Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 1 | //===------- SemaTemplate.cpp - Semantic Analysis for C++ Templates -------===/ |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
Douglas Gregor | 99ebf65 | 2009-02-27 19:31:52 +0000 | [diff] [blame] | 7 | //===----------------------------------------------------------------------===/ |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 8 | // |
| 9 | // This file implements semantic analysis for C++ templates. |
Douglas Gregor | 99ebf65 | 2009-02-27 19:31:52 +0000 | [diff] [blame] | 10 | //===----------------------------------------------------------------------===/ |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 11 | |
Douglas Gregor | 4a959d8 | 2009-08-06 16:20:37 +0000 | [diff] [blame] | 12 | #include "TreeTransform.h" |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 13 | #include "clang/AST/ASTContext.h" |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 14 | #include "clang/AST/ASTConsumer.h" |
John McCall | 92b7f70 | 2010-03-11 07:50:04 +0000 | [diff] [blame] | 15 | #include "clang/AST/DeclFriend.h" |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 16 | #include "clang/AST/DeclTemplate.h" |
Chandler Carruth | 55fc873 | 2012-12-04 09:13:33 +0000 | [diff] [blame] | 17 | #include "clang/AST/Expr.h" |
| 18 | #include "clang/AST/ExprCXX.h" |
John McCall | 4e2cbb2 | 2010-10-20 05:44:58 +0000 | [diff] [blame] | 19 | #include "clang/AST/RecursiveASTVisitor.h" |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 20 | #include "clang/AST/TypeVisitor.h" |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 21 | #include "clang/Basic/LangOptions.h" |
Douglas Gregor | d5a423b | 2009-09-25 18:43:00 +0000 | [diff] [blame] | 22 | #include "clang/Basic/PartialDiagnostic.h" |
Chandler Carruth | 55fc873 | 2012-12-04 09:13:33 +0000 | [diff] [blame] | 23 | #include "clang/Sema/DeclSpec.h" |
| 24 | #include "clang/Sema/Lookup.h" |
| 25 | #include "clang/Sema/ParsedTemplate.h" |
| 26 | #include "clang/Sema/Scope.h" |
| 27 | #include "clang/Sema/SemaInternal.h" |
| 28 | #include "clang/Sema/Template.h" |
| 29 | #include "clang/Sema/TemplateDeduction.h" |
Benjamin Kramer | 013b366 | 2012-01-30 16:17:39 +0000 | [diff] [blame] | 30 | #include "llvm/ADT/SmallBitVector.h" |
Benjamin Kramer | 8fe83e1 | 2012-02-04 13:45:25 +0000 | [diff] [blame] | 31 | #include "llvm/ADT/SmallString.h" |
Douglas Gregor | bf4ea56 | 2009-09-15 16:23:51 +0000 | [diff] [blame] | 32 | #include "llvm/ADT/StringExtras.h" |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 33 | using namespace clang; |
John McCall | 2a7fb27 | 2010-08-25 05:32:35 +0000 | [diff] [blame] | 34 | using namespace sema; |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 35 | |
John McCall | 78b8105 | 2010-11-10 02:40:36 +0000 | [diff] [blame] | 36 | // Exported for use by Parser. |
| 37 | SourceRange |
| 38 | clang::getTemplateParamsRange(TemplateParameterList const * const *Ps, |
| 39 | unsigned N) { |
| 40 | if (!N) return SourceRange(); |
| 41 | return SourceRange(Ps[0]->getTemplateLoc(), Ps[N-1]->getRAngleLoc()); |
| 42 | } |
| 43 | |
Douglas Gregor | 2dd078a | 2009-09-02 22:59:36 +0000 | [diff] [blame] | 44 | /// \brief Determine whether the declaration found is acceptable as the name |
| 45 | /// of a template and, if so, return that template declaration. Otherwise, |
| 46 | /// returns NULL. |
John McCall | ad00b77 | 2010-06-16 08:42:20 +0000 | [diff] [blame] | 47 | static NamedDecl *isAcceptableTemplateName(ASTContext &Context, |
Douglas Gregor | 5a7a5bb | 2012-03-10 23:52:41 +0000 | [diff] [blame] | 48 | NamedDecl *Orig, |
| 49 | bool AllowFunctionTemplates) { |
John McCall | ad00b77 | 2010-06-16 08:42:20 +0000 | [diff] [blame] | 50 | NamedDecl *D = Orig->getUnderlyingDecl(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 51 | |
Douglas Gregor | 5a7a5bb | 2012-03-10 23:52:41 +0000 | [diff] [blame] | 52 | if (isa<TemplateDecl>(D)) { |
| 53 | if (!AllowFunctionTemplates && isa<FunctionTemplateDecl>(D)) |
| 54 | return 0; |
| 55 | |
John McCall | ad00b77 | 2010-06-16 08:42:20 +0000 | [diff] [blame] | 56 | return Orig; |
Douglas Gregor | 5a7a5bb | 2012-03-10 23:52:41 +0000 | [diff] [blame] | 57 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 58 | |
Douglas Gregor | 2dd078a | 2009-09-02 22:59:36 +0000 | [diff] [blame] | 59 | if (CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(D)) { |
| 60 | // C++ [temp.local]p1: |
| 61 | // Like normal (non-template) classes, class templates have an |
| 62 | // injected-class-name (Clause 9). The injected-class-name |
| 63 | // can be used with or without a template-argument-list. When |
| 64 | // it is used without a template-argument-list, it is |
| 65 | // equivalent to the injected-class-name followed by the |
| 66 | // template-parameters of the class template enclosed in |
| 67 | // <>. When it is used with a template-argument-list, it |
| 68 | // refers to the specified class template specialization, |
| 69 | // which could be the current specialization or another |
| 70 | // specialization. |
| 71 | if (Record->isInjectedClassName()) { |
Douglas Gregor | 542b548 | 2009-10-14 17:30:58 +0000 | [diff] [blame] | 72 | Record = cast<CXXRecordDecl>(Record->getDeclContext()); |
Douglas Gregor | 2dd078a | 2009-09-02 22:59:36 +0000 | [diff] [blame] | 73 | if (Record->getDescribedClassTemplate()) |
| 74 | return Record->getDescribedClassTemplate(); |
| 75 | |
| 76 | if (ClassTemplateSpecializationDecl *Spec |
| 77 | = dyn_cast<ClassTemplateSpecializationDecl>(Record)) |
| 78 | return Spec->getSpecializedTemplate(); |
| 79 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 80 | |
Douglas Gregor | 2dd078a | 2009-09-02 22:59:36 +0000 | [diff] [blame] | 81 | return 0; |
| 82 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 83 | |
Douglas Gregor | 2dd078a | 2009-09-02 22:59:36 +0000 | [diff] [blame] | 84 | return 0; |
| 85 | } |
| 86 | |
Douglas Gregor | 5a7a5bb | 2012-03-10 23:52:41 +0000 | [diff] [blame] | 87 | void Sema::FilterAcceptableTemplateNames(LookupResult &R, |
| 88 | bool AllowFunctionTemplates) { |
Douglas Gregor | 01e56ae | 2010-04-12 20:54:26 +0000 | [diff] [blame] | 89 | // The set of class templates we've already seen. |
| 90 | llvm::SmallPtrSet<ClassTemplateDecl *, 8> ClassTemplates; |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 91 | LookupResult::Filter filter = R.makeFilter(); |
| 92 | while (filter.hasNext()) { |
| 93 | NamedDecl *Orig = filter.next(); |
Douglas Gregor | 5a7a5bb | 2012-03-10 23:52:41 +0000 | [diff] [blame] | 94 | NamedDecl *Repl = isAcceptableTemplateName(Context, Orig, |
| 95 | AllowFunctionTemplates); |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 96 | if (!Repl) |
| 97 | filter.erase(); |
Douglas Gregor | 01e56ae | 2010-04-12 20:54:26 +0000 | [diff] [blame] | 98 | else if (Repl != Orig) { |
| 99 | |
| 100 | // C++ [temp.local]p3: |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 101 | // A lookup that finds an injected-class-name (10.2) can result in an |
Douglas Gregor | 01e56ae | 2010-04-12 20:54:26 +0000 | [diff] [blame] | 102 | // ambiguity in certain cases (for example, if it is found in more than |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 103 | // one base class). If all of the injected-class-names that are found |
| 104 | // refer to specializations of the same class template, and if the name |
Richard Smith | 3e4c6c4 | 2011-05-05 21:57:07 +0000 | [diff] [blame] | 105 | // is used as a template-name, the reference refers to the class |
| 106 | // template itself and not a specialization thereof, and is not |
Douglas Gregor | 01e56ae | 2010-04-12 20:54:26 +0000 | [diff] [blame] | 107 | // ambiguous. |
Douglas Gregor | 01e56ae | 2010-04-12 20:54:26 +0000 | [diff] [blame] | 108 | if (ClassTemplateDecl *ClassTmpl = dyn_cast<ClassTemplateDecl>(Repl)) |
| 109 | if (!ClassTemplates.insert(ClassTmpl)) { |
| 110 | filter.erase(); |
| 111 | continue; |
| 112 | } |
John McCall | 8ba6691 | 2010-08-13 07:02:08 +0000 | [diff] [blame] | 113 | |
| 114 | // FIXME: we promote access to public here as a workaround to |
| 115 | // the fact that LookupResult doesn't let us remember that we |
| 116 | // found this template through a particular injected class name, |
| 117 | // which means we end up doing nasty things to the invariants. |
| 118 | // Pretending that access is public is *much* safer. |
| 119 | filter.replace(Repl, AS_public); |
Douglas Gregor | 01e56ae | 2010-04-12 20:54:26 +0000 | [diff] [blame] | 120 | } |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 121 | } |
| 122 | filter.done(); |
| 123 | } |
| 124 | |
Douglas Gregor | 5a7a5bb | 2012-03-10 23:52:41 +0000 | [diff] [blame] | 125 | bool Sema::hasAnyAcceptableTemplateNames(LookupResult &R, |
| 126 | bool AllowFunctionTemplates) { |
Douglas Gregor | 312eadb | 2011-04-24 05:37:28 +0000 | [diff] [blame] | 127 | for (LookupResult::iterator I = R.begin(), IEnd = R.end(); I != IEnd; ++I) |
Douglas Gregor | 5a7a5bb | 2012-03-10 23:52:41 +0000 | [diff] [blame] | 128 | if (isAcceptableTemplateName(Context, *I, AllowFunctionTemplates)) |
Douglas Gregor | 312eadb | 2011-04-24 05:37:28 +0000 | [diff] [blame] | 129 | return true; |
| 130 | |
Douglas Gregor | 3b88735 | 2011-04-27 04:48:22 +0000 | [diff] [blame] | 131 | return false; |
Douglas Gregor | 312eadb | 2011-04-24 05:37:28 +0000 | [diff] [blame] | 132 | } |
| 133 | |
Douglas Gregor | 2dd078a | 2009-09-02 22:59:36 +0000 | [diff] [blame] | 134 | TemplateNameKind Sema::isTemplateName(Scope *S, |
Jeffrey Yasskin | 9ab1454 | 2010-04-08 16:38:48 +0000 | [diff] [blame] | 135 | CXXScopeSpec &SS, |
Abramo Bagnara | 7c15353 | 2010-08-06 12:11:11 +0000 | [diff] [blame] | 136 | bool hasTemplateKeyword, |
Douglas Gregor | 014e88d | 2009-11-03 23:16:33 +0000 | [diff] [blame] | 137 | UnqualifiedId &Name, |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 138 | ParsedType ObjectTypePtr, |
Douglas Gregor | 495c35d | 2009-08-25 22:51:20 +0000 | [diff] [blame] | 139 | bool EnteringContext, |
Douglas Gregor | 1fd6d44 | 2010-05-21 23:18:07 +0000 | [diff] [blame] | 140 | TemplateTy &TemplateResult, |
| 141 | bool &MemberOfUnknownSpecialization) { |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 142 | assert(getLangOpts().CPlusPlus && "No template names in C!"); |
Douglas Gregor | b862b8f | 2010-01-11 23:29:10 +0000 | [diff] [blame] | 143 | |
Douglas Gregor | 014e88d | 2009-11-03 23:16:33 +0000 | [diff] [blame] | 144 | DeclarationName TName; |
Douglas Gregor | 1fd6d44 | 2010-05-21 23:18:07 +0000 | [diff] [blame] | 145 | MemberOfUnknownSpecialization = false; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 146 | |
Douglas Gregor | 014e88d | 2009-11-03 23:16:33 +0000 | [diff] [blame] | 147 | switch (Name.getKind()) { |
| 148 | case UnqualifiedId::IK_Identifier: |
| 149 | TName = DeclarationName(Name.Identifier); |
| 150 | break; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 151 | |
Douglas Gregor | 014e88d | 2009-11-03 23:16:33 +0000 | [diff] [blame] | 152 | case UnqualifiedId::IK_OperatorFunctionId: |
| 153 | TName = Context.DeclarationNames.getCXXOperatorName( |
| 154 | Name.OperatorFunctionId.Operator); |
| 155 | break; |
| 156 | |
Sean Hunt | e6252d1 | 2009-11-28 08:58:14 +0000 | [diff] [blame] | 157 | case UnqualifiedId::IK_LiteralOperatorId: |
Sean Hunt | 3e518bd | 2009-11-29 07:34:05 +0000 | [diff] [blame] | 158 | TName = Context.DeclarationNames.getCXXLiteralOperatorName(Name.Identifier); |
| 159 | break; |
Sean Hunt | e6252d1 | 2009-11-28 08:58:14 +0000 | [diff] [blame] | 160 | |
Douglas Gregor | 014e88d | 2009-11-03 23:16:33 +0000 | [diff] [blame] | 161 | default: |
| 162 | return TNK_Non_template; |
| 163 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 164 | |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 165 | QualType ObjectType = ObjectTypePtr.get(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 166 | |
Daniel Dunbar | 96a0014 | 2012-03-09 18:35:03 +0000 | [diff] [blame] | 167 | LookupResult R(*this, TName, Name.getLocStart(), LookupOrdinaryName); |
Douglas Gregor | 1fd6d44 | 2010-05-21 23:18:07 +0000 | [diff] [blame] | 168 | LookupTemplateName(R, S, SS, ObjectType, EnteringContext, |
| 169 | MemberOfUnknownSpecialization); |
John McCall | 67d22fb | 2010-08-28 20:17:00 +0000 | [diff] [blame] | 170 | if (R.empty()) return TNK_Non_template; |
| 171 | if (R.isAmbiguous()) { |
| 172 | // Suppress diagnostics; we'll redo this lookup later. |
John McCall | b859206 | 2010-08-13 02:23:42 +0000 | [diff] [blame] | 173 | R.suppressDiagnostics(); |
John McCall | 67d22fb | 2010-08-28 20:17:00 +0000 | [diff] [blame] | 174 | |
| 175 | // FIXME: we might have ambiguous templates, in which case we |
| 176 | // should at least parse them properly! |
Douglas Gregor | 2dd078a | 2009-09-02 22:59:36 +0000 | [diff] [blame] | 177 | return TNK_Non_template; |
John McCall | b859206 | 2010-08-13 02:23:42 +0000 | [diff] [blame] | 178 | } |
Douglas Gregor | 2dd078a | 2009-09-02 22:59:36 +0000 | [diff] [blame] | 179 | |
John McCall | 0bd6feb | 2009-12-02 08:04:21 +0000 | [diff] [blame] | 180 | TemplateName Template; |
| 181 | TemplateNameKind TemplateKind; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 182 | |
John McCall | 0bd6feb | 2009-12-02 08:04:21 +0000 | [diff] [blame] | 183 | unsigned ResultCount = R.end() - R.begin(); |
| 184 | if (ResultCount > 1) { |
| 185 | // We assume that we'll preserve the qualifier from a function |
| 186 | // template name in other ways. |
| 187 | Template = Context.getOverloadedTemplateName(R.begin(), R.end()); |
| 188 | TemplateKind = TNK_Function_template; |
John McCall | b859206 | 2010-08-13 02:23:42 +0000 | [diff] [blame] | 189 | |
| 190 | // We'll do this lookup again later. |
| 191 | R.suppressDiagnostics(); |
Douglas Gregor | 2dd078a | 2009-09-02 22:59:36 +0000 | [diff] [blame] | 192 | } else { |
John McCall | 0bd6feb | 2009-12-02 08:04:21 +0000 | [diff] [blame] | 193 | TemplateDecl *TD = cast<TemplateDecl>((*R.begin())->getUnderlyingDecl()); |
| 194 | |
| 195 | if (SS.isSet() && !SS.isInvalid()) { |
| 196 | NestedNameSpecifier *Qualifier |
| 197 | = static_cast<NestedNameSpecifier *>(SS.getScopeRep()); |
Abramo Bagnara | 7c15353 | 2010-08-06 12:11:11 +0000 | [diff] [blame] | 198 | Template = Context.getQualifiedTemplateName(Qualifier, |
| 199 | hasTemplateKeyword, TD); |
John McCall | 0bd6feb | 2009-12-02 08:04:21 +0000 | [diff] [blame] | 200 | } else { |
| 201 | Template = TemplateName(TD); |
| 202 | } |
| 203 | |
John McCall | b859206 | 2010-08-13 02:23:42 +0000 | [diff] [blame] | 204 | if (isa<FunctionTemplateDecl>(TD)) { |
John McCall | 0bd6feb | 2009-12-02 08:04:21 +0000 | [diff] [blame] | 205 | TemplateKind = TNK_Function_template; |
John McCall | b859206 | 2010-08-13 02:23:42 +0000 | [diff] [blame] | 206 | |
| 207 | // We'll do this lookup again later. |
| 208 | R.suppressDiagnostics(); |
| 209 | } else { |
Richard Smith | 3e4c6c4 | 2011-05-05 21:57:07 +0000 | [diff] [blame] | 210 | assert(isa<ClassTemplateDecl>(TD) || isa<TemplateTemplateParmDecl>(TD) || |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 211 | isa<TypeAliasTemplateDecl>(TD) || isa<VarTemplateDecl>(TD)); |
| 212 | TemplateKind = |
| 213 | isa<VarTemplateDecl>(TD) ? TNK_Var_template : TNK_Type_template; |
John McCall | 0bd6feb | 2009-12-02 08:04:21 +0000 | [diff] [blame] | 214 | } |
Douglas Gregor | 2dd078a | 2009-09-02 22:59:36 +0000 | [diff] [blame] | 215 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 216 | |
John McCall | 0bd6feb | 2009-12-02 08:04:21 +0000 | [diff] [blame] | 217 | TemplateResult = TemplateTy::make(Template); |
| 218 | return TemplateKind; |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 219 | } |
| 220 | |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 221 | bool Sema::DiagnoseUnknownTemplateName(const IdentifierInfo &II, |
Douglas Gregor | 84d0a19 | 2010-01-12 21:28:44 +0000 | [diff] [blame] | 222 | SourceLocation IILoc, |
| 223 | Scope *S, |
| 224 | const CXXScopeSpec *SS, |
| 225 | TemplateTy &SuggestedTemplate, |
| 226 | TemplateNameKind &SuggestedKind) { |
| 227 | // We can't recover unless there's a dependent scope specifier preceding the |
| 228 | // template name. |
Douglas Gregor | d5ab9b0 | 2010-05-21 23:43:39 +0000 | [diff] [blame] | 229 | // FIXME: Typo correction? |
Douglas Gregor | 84d0a19 | 2010-01-12 21:28:44 +0000 | [diff] [blame] | 230 | if (!SS || !SS->isSet() || !isDependentScopeSpecifier(*SS) || |
| 231 | computeDeclContext(*SS)) |
| 232 | return false; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 233 | |
Douglas Gregor | 84d0a19 | 2010-01-12 21:28:44 +0000 | [diff] [blame] | 234 | // The code is missing a 'template' keyword prior to the dependent template |
| 235 | // name. |
| 236 | NestedNameSpecifier *Qualifier = (NestedNameSpecifier*)SS->getScopeRep(); |
| 237 | Diag(IILoc, diag::err_template_kw_missing) |
| 238 | << Qualifier << II.getName() |
Douglas Gregor | 849b243 | 2010-03-31 17:46:05 +0000 | [diff] [blame] | 239 | << FixItHint::CreateInsertion(IILoc, "template "); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 240 | SuggestedTemplate |
Douglas Gregor | 84d0a19 | 2010-01-12 21:28:44 +0000 | [diff] [blame] | 241 | = TemplateTy::make(Context.getDependentTemplateName(Qualifier, &II)); |
| 242 | SuggestedKind = TNK_Dependent_template_name; |
| 243 | return true; |
| 244 | } |
| 245 | |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 246 | void Sema::LookupTemplateName(LookupResult &Found, |
Jeffrey Yasskin | 9ab1454 | 2010-04-08 16:38:48 +0000 | [diff] [blame] | 247 | Scope *S, CXXScopeSpec &SS, |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 248 | QualType ObjectType, |
Douglas Gregor | 1fd6d44 | 2010-05-21 23:18:07 +0000 | [diff] [blame] | 249 | bool EnteringContext, |
| 250 | bool &MemberOfUnknownSpecialization) { |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 251 | // Determine where to perform name lookup |
Douglas Gregor | 1fd6d44 | 2010-05-21 23:18:07 +0000 | [diff] [blame] | 252 | MemberOfUnknownSpecialization = false; |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 253 | DeclContext *LookupCtx = 0; |
| 254 | bool isDependent = false; |
| 255 | if (!ObjectType.isNull()) { |
| 256 | // This nested-name-specifier occurs in a member access expression, e.g., |
| 257 | // x->B::f, and we are looking into the type of the object. |
| 258 | assert(!SS.isSet() && "ObjectType and scope specifier cannot coexist"); |
| 259 | LookupCtx = computeDeclContext(ObjectType); |
| 260 | isDependent = ObjectType->isDependentType(); |
Richard Smith | 33f0faa | 2013-06-07 20:03:01 +0000 | [diff] [blame] | 261 | assert((isDependent || !ObjectType->isIncompleteType() || |
| 262 | ObjectType->castAs<TagType>()->isBeingDefined()) && |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 263 | "Caller should have completed object type"); |
Douglas Gregor | 1d7049a | 2012-01-12 16:11:24 +0000 | [diff] [blame] | 264 | |
| 265 | // Template names cannot appear inside an Objective-C class or object type. |
| 266 | if (ObjectType->isObjCObjectOrInterfaceType()) { |
| 267 | Found.clear(); |
| 268 | return; |
| 269 | } |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 270 | } else if (SS.isSet()) { |
| 271 | // This nested-name-specifier occurs after another nested-name-specifier, |
| 272 | // so long into the context associated with the prior nested-name-specifier. |
| 273 | LookupCtx = computeDeclContext(SS, EnteringContext); |
| 274 | isDependent = isDependentScopeSpecifier(SS); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 275 | |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 276 | // The declaration context must be complete. |
John McCall | 77bb1aa | 2010-05-01 00:40:08 +0000 | [diff] [blame] | 277 | if (LookupCtx && RequireCompleteDeclContext(SS, LookupCtx)) |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 278 | return; |
| 279 | } |
| 280 | |
| 281 | bool ObjectTypeSearchedInScope = false; |
Douglas Gregor | 5a7a5bb | 2012-03-10 23:52:41 +0000 | [diff] [blame] | 282 | bool AllowFunctionTemplatesInLookup = true; |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 283 | if (LookupCtx) { |
| 284 | // Perform "qualified" name lookup into the declaration context we |
| 285 | // computed, which is either the type of the base of a member access |
| 286 | // expression or the declaration context associated with a prior |
| 287 | // nested-name-specifier. |
| 288 | LookupQualifiedName(Found, LookupCtx); |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 289 | if (!ObjectType.isNull() && Found.empty()) { |
| 290 | // C++ [basic.lookup.classref]p1: |
| 291 | // In a class member access expression (5.2.5), if the . or -> token is |
| 292 | // immediately followed by an identifier followed by a <, the |
| 293 | // identifier must be looked up to determine whether the < is the |
| 294 | // beginning of a template argument list (14.2) or a less-than operator. |
| 295 | // The identifier is first looked up in the class of the object |
| 296 | // expression. If the identifier is not found, it is then looked up in |
| 297 | // the context of the entire postfix-expression and shall name a class |
| 298 | // or function template. |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 299 | if (S) LookupName(Found, S); |
| 300 | ObjectTypeSearchedInScope = true; |
Douglas Gregor | 5a7a5bb | 2012-03-10 23:52:41 +0000 | [diff] [blame] | 301 | AllowFunctionTemplatesInLookup = false; |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 302 | } |
Douglas Gregor | f9f97a0 | 2010-07-16 16:54:17 +0000 | [diff] [blame] | 303 | } else if (isDependent && (!S || ObjectType.isNull())) { |
Douglas Gregor | 2e93388 | 2010-01-12 17:06:20 +0000 | [diff] [blame] | 304 | // We cannot look into a dependent object type or nested nme |
| 305 | // specifier. |
Douglas Gregor | 1fd6d44 | 2010-05-21 23:18:07 +0000 | [diff] [blame] | 306 | MemberOfUnknownSpecialization = true; |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 307 | return; |
| 308 | } else { |
| 309 | // Perform unqualified name lookup in the current scope. |
| 310 | LookupName(Found, S); |
Douglas Gregor | 5a7a5bb | 2012-03-10 23:52:41 +0000 | [diff] [blame] | 311 | |
| 312 | if (!ObjectType.isNull()) |
| 313 | AllowFunctionTemplatesInLookup = false; |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 314 | } |
| 315 | |
Douglas Gregor | 2e93388 | 2010-01-12 17:06:20 +0000 | [diff] [blame] | 316 | if (Found.empty() && !isDependent) { |
Douglas Gregor | bfea239 | 2009-12-31 08:11:17 +0000 | [diff] [blame] | 317 | // If we did not find any names, attempt to correct any typos. |
| 318 | DeclarationName Name = Found.getLookupName(); |
Douglas Gregor | d8bba9c | 2011-06-28 16:20:02 +0000 | [diff] [blame] | 319 | Found.clear(); |
Kaelyn Uhrain | f8ec8c9 | 2012-01-13 23:10:36 +0000 | [diff] [blame] | 320 | // Simple filter callback that, for keywords, only accepts the C++ *_cast |
| 321 | CorrectionCandidateCallback FilterCCC; |
| 322 | FilterCCC.WantTypeSpecifiers = false; |
| 323 | FilterCCC.WantExpressionKeywords = false; |
| 324 | FilterCCC.WantRemainingKeywords = false; |
| 325 | FilterCCC.WantCXXNamedCasts = true; |
Douglas Gregor | d8bba9c | 2011-06-28 16:20:02 +0000 | [diff] [blame] | 326 | if (TypoCorrection Corrected = CorrectTypo(Found.getLookupNameInfo(), |
| 327 | Found.getLookupKind(), S, &SS, |
Kaelyn Uhrain | 16e46dd | 2012-01-31 23:49:25 +0000 | [diff] [blame] | 328 | FilterCCC, LookupCtx)) { |
Douglas Gregor | d8bba9c | 2011-06-28 16:20:02 +0000 | [diff] [blame] | 329 | Found.setLookupName(Corrected.getCorrection()); |
| 330 | if (Corrected.getCorrectionDecl()) |
| 331 | Found.addDecl(Corrected.getCorrectionDecl()); |
Douglas Gregor | 312eadb | 2011-04-24 05:37:28 +0000 | [diff] [blame] | 332 | FilterAcceptableTemplateNames(Found); |
John McCall | ad00b77 | 2010-06-16 08:42:20 +0000 | [diff] [blame] | 333 | if (!Found.empty()) { |
Kaelyn Uhrain | b2567dd | 2013-07-02 23:47:44 +0000 | [diff] [blame] | 334 | if (LookupCtx) { |
Richard Smith | 2d67097 | 2013-08-17 00:46:16 +0000 | [diff] [blame] | 335 | std::string CorrectedStr(Corrected.getAsString(getLangOpts())); |
| 336 | bool DroppedSpecifier = Corrected.WillReplaceSpecifier() && |
Kaelyn Uhrain | b2567dd | 2013-07-02 23:47:44 +0000 | [diff] [blame] | 337 | Name.getAsString() == CorrectedStr; |
Richard Smith | 2d67097 | 2013-08-17 00:46:16 +0000 | [diff] [blame] | 338 | diagnoseTypo(Corrected, PDiag(diag::err_no_member_template_suggest) |
| 339 | << Name << LookupCtx << DroppedSpecifier |
| 340 | << SS.getRange()); |
Kaelyn Uhrain | b2567dd | 2013-07-02 23:47:44 +0000 | [diff] [blame] | 341 | } else { |
Richard Smith | 2d67097 | 2013-08-17 00:46:16 +0000 | [diff] [blame] | 342 | diagnoseTypo(Corrected, PDiag(diag::err_no_template_suggest) << Name); |
Kaelyn Uhrain | b2567dd | 2013-07-02 23:47:44 +0000 | [diff] [blame] | 343 | } |
John McCall | ad00b77 | 2010-06-16 08:42:20 +0000 | [diff] [blame] | 344 | } |
Douglas Gregor | bfea239 | 2009-12-31 08:11:17 +0000 | [diff] [blame] | 345 | } else { |
Douglas Gregor | 12eb5d6 | 2010-06-29 19:27:42 +0000 | [diff] [blame] | 346 | Found.setLookupName(Name); |
Douglas Gregor | bfea239 | 2009-12-31 08:11:17 +0000 | [diff] [blame] | 347 | } |
| 348 | } |
| 349 | |
Douglas Gregor | 5a7a5bb | 2012-03-10 23:52:41 +0000 | [diff] [blame] | 350 | FilterAcceptableTemplateNames(Found, AllowFunctionTemplatesInLookup); |
Douglas Gregor | f9f97a0 | 2010-07-16 16:54:17 +0000 | [diff] [blame] | 351 | if (Found.empty()) { |
| 352 | if (isDependent) |
| 353 | MemberOfUnknownSpecialization = true; |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 354 | return; |
Douglas Gregor | f9f97a0 | 2010-07-16 16:54:17 +0000 | [diff] [blame] | 355 | } |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 356 | |
Douglas Gregor | 05e6076 | 2012-05-01 20:23:02 +0000 | [diff] [blame] | 357 | if (S && !ObjectType.isNull() && !ObjectTypeSearchedInScope && |
Richard Smith | efd570e | 2013-09-03 21:22:41 +0000 | [diff] [blame] | 358 | !getLangOpts().CPlusPlus11) { |
Douglas Gregor | 05e6076 | 2012-05-01 20:23:02 +0000 | [diff] [blame] | 359 | // C++03 [basic.lookup.classref]p1: |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 360 | // [...] If the lookup in the class of the object expression finds a |
| 361 | // template, the name is also looked up in the context of the entire |
| 362 | // postfix-expression and [...] |
| 363 | // |
Douglas Gregor | 05e6076 | 2012-05-01 20:23:02 +0000 | [diff] [blame] | 364 | // Note: C++11 does not perform this second lookup. |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 365 | LookupResult FoundOuter(*this, Found.getLookupName(), Found.getNameLoc(), |
| 366 | LookupOrdinaryName); |
| 367 | LookupName(FoundOuter, S); |
Douglas Gregor | 5a7a5bb | 2012-03-10 23:52:41 +0000 | [diff] [blame] | 368 | FilterAcceptableTemplateNames(FoundOuter, /*AllowFunctionTemplates=*/false); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 369 | |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 370 | if (FoundOuter.empty()) { |
| 371 | // - if the name is not found, the name found in the class of the |
| 372 | // object expression is used, otherwise |
Douglas Gregor | a6d1e76 | 2011-08-10 21:59:45 +0000 | [diff] [blame] | 373 | } else if (!FoundOuter.getAsSingle<ClassTemplateDecl>() || |
| 374 | FoundOuter.isAmbiguous()) { |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 375 | // - if the name is found in the context of the entire |
| 376 | // postfix-expression and does not name a class template, the name |
| 377 | // found in the class of the object expression is used, otherwise |
Douglas Gregor | a6d1e76 | 2011-08-10 21:59:45 +0000 | [diff] [blame] | 378 | FoundOuter.clear(); |
John McCall | ad00b77 | 2010-06-16 08:42:20 +0000 | [diff] [blame] | 379 | } else if (!Found.isSuppressingDiagnostics()) { |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 380 | // - if the name found is a class template, it must refer to the same |
| 381 | // entity as the one found in the class of the object expression, |
| 382 | // otherwise the program is ill-formed. |
| 383 | if (!Found.isSingleResult() || |
| 384 | Found.getFoundDecl()->getCanonicalDecl() |
| 385 | != FoundOuter.getFoundDecl()->getCanonicalDecl()) { |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 386 | Diag(Found.getNameLoc(), |
Jeffrey Yasskin | 21d07e4 | 2010-06-05 01:39:57 +0000 | [diff] [blame] | 387 | diag::ext_nested_name_member_ref_lookup_ambiguous) |
| 388 | << Found.getLookupName() |
| 389 | << ObjectType; |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 390 | Diag(Found.getRepresentativeDecl()->getLocation(), |
| 391 | diag::note_ambig_member_ref_object_type) |
| 392 | << ObjectType; |
| 393 | Diag(FoundOuter.getFoundDecl()->getLocation(), |
| 394 | diag::note_ambig_member_ref_scope); |
| 395 | |
| 396 | // Recover by taking the template that we found in the object |
| 397 | // expression's type. |
| 398 | } |
| 399 | } |
| 400 | } |
| 401 | } |
| 402 | |
John McCall | 2f841ba | 2009-12-02 03:53:29 +0000 | [diff] [blame] | 403 | /// ActOnDependentIdExpression - Handle a dependent id-expression that |
| 404 | /// was just parsed. This is only possible with an explicit scope |
| 405 | /// specifier naming a dependent type. |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 406 | ExprResult |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 407 | Sema::ActOnDependentIdExpression(const CXXScopeSpec &SS, |
Abramo Bagnara | e4b9276 | 2012-01-27 09:46:47 +0000 | [diff] [blame] | 408 | SourceLocation TemplateKWLoc, |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 409 | const DeclarationNameInfo &NameInfo, |
John McCall | 2f841ba | 2009-12-02 03:53:29 +0000 | [diff] [blame] | 410 | bool isAddressOfOperand, |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 411 | const TemplateArgumentListInfo *TemplateArgs) { |
John McCall | ea1471e | 2010-05-20 01:18:31 +0000 | [diff] [blame] | 412 | DeclContext *DC = getFunctionLevelDeclContext(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 413 | |
John McCall | 2f841ba | 2009-12-02 03:53:29 +0000 | [diff] [blame] | 414 | if (!isAddressOfOperand && |
John McCall | ea1471e | 2010-05-20 01:18:31 +0000 | [diff] [blame] | 415 | isa<CXXMethodDecl>(DC) && |
| 416 | cast<CXXMethodDecl>(DC)->isInstance()) { |
| 417 | QualType ThisType = cast<CXXMethodDecl>(DC)->getThisType(Context); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 418 | |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 419 | // Since the 'this' expression is synthesized, we don't need to |
| 420 | // perform the double-lookup check. |
| 421 | NamedDecl *FirstQualifierInScope = 0; |
| 422 | |
John McCall | aa81e16 | 2009-12-01 22:10:20 +0000 | [diff] [blame] | 423 | return Owned(CXXDependentScopeMemberExpr::Create(Context, |
| 424 | /*This*/ 0, ThisType, |
| 425 | /*IsArrow*/ true, |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 426 | /*Op*/ SourceLocation(), |
Douglas Gregor | 7c3179c | 2011-02-28 18:50:33 +0000 | [diff] [blame] | 427 | SS.getWithLocInContext(Context), |
Abramo Bagnara | e4b9276 | 2012-01-27 09:46:47 +0000 | [diff] [blame] | 428 | TemplateKWLoc, |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 429 | FirstQualifierInScope, |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 430 | NameInfo, |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 431 | TemplateArgs)); |
| 432 | } |
| 433 | |
Abramo Bagnara | e4b9276 | 2012-01-27 09:46:47 +0000 | [diff] [blame] | 434 | return BuildDependentDeclRefExpr(SS, TemplateKWLoc, NameInfo, TemplateArgs); |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 435 | } |
| 436 | |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 437 | ExprResult |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 438 | Sema::BuildDependentDeclRefExpr(const CXXScopeSpec &SS, |
Abramo Bagnara | e4b9276 | 2012-01-27 09:46:47 +0000 | [diff] [blame] | 439 | SourceLocation TemplateKWLoc, |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 440 | const DeclarationNameInfo &NameInfo, |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 441 | const TemplateArgumentListInfo *TemplateArgs) { |
| 442 | return Owned(DependentScopeDeclRefExpr::Create(Context, |
Douglas Gregor | 00cf3cc | 2011-02-25 20:49:16 +0000 | [diff] [blame] | 443 | SS.getWithLocInContext(Context), |
Abramo Bagnara | e4b9276 | 2012-01-27 09:46:47 +0000 | [diff] [blame] | 444 | TemplateKWLoc, |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 445 | NameInfo, |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 446 | TemplateArgs)); |
Douglas Gregor | d6fb7ef | 2008-12-18 19:37:40 +0000 | [diff] [blame] | 447 | } |
| 448 | |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 449 | /// DiagnoseTemplateParameterShadow - Produce a diagnostic complaining |
| 450 | /// that the template parameter 'PrevDecl' is being shadowed by a new |
| 451 | /// declaration at location Loc. Returns true to indicate that this is |
| 452 | /// an error, and false otherwise. |
Douglas Gregor | cb8f951 | 2011-10-20 17:58:49 +0000 | [diff] [blame] | 453 | void Sema::DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl) { |
Douglas Gregor | f57172b | 2008-12-08 18:40:42 +0000 | [diff] [blame] | 454 | assert(PrevDecl->isTemplateParameter() && "Not a template parameter"); |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 455 | |
| 456 | // Microsoft Visual C++ permits template parameters to be shadowed. |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 457 | if (getLangOpts().MicrosoftExt) |
Douglas Gregor | cb8f951 | 2011-10-20 17:58:49 +0000 | [diff] [blame] | 458 | return; |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 459 | |
| 460 | // C++ [temp.local]p4: |
| 461 | // A template-parameter shall not be redeclared within its |
| 462 | // scope (including nested scopes). |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 463 | Diag(Loc, diag::err_template_param_shadow) |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 464 | << cast<NamedDecl>(PrevDecl)->getDeclName(); |
| 465 | Diag(PrevDecl->getLocation(), diag::note_template_param_here); |
Douglas Gregor | cb8f951 | 2011-10-20 17:58:49 +0000 | [diff] [blame] | 466 | return; |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 467 | } |
| 468 | |
Douglas Gregor | 2943aed | 2009-03-03 04:44:36 +0000 | [diff] [blame] | 469 | /// AdjustDeclIfTemplate - If the given decl happens to be a template, reset |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 470 | /// the parameter D to reference the templated declaration and return a pointer |
| 471 | /// to the template declaration. Otherwise, do nothing to D and return null. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 472 | TemplateDecl *Sema::AdjustDeclIfTemplate(Decl *&D) { |
| 473 | if (TemplateDecl *Temp = dyn_cast_or_null<TemplateDecl>(D)) { |
| 474 | D = Temp->getTemplatedDecl(); |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 475 | return Temp; |
| 476 | } |
| 477 | return 0; |
| 478 | } |
| 479 | |
Douglas Gregor | ba68eca | 2011-01-05 17:40:24 +0000 | [diff] [blame] | 480 | ParsedTemplateArgument ParsedTemplateArgument::getTemplatePackExpansion( |
| 481 | SourceLocation EllipsisLoc) const { |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 482 | assert(Kind == Template && |
Douglas Gregor | ba68eca | 2011-01-05 17:40:24 +0000 | [diff] [blame] | 483 | "Only template template arguments can be pack expansions here"); |
| 484 | assert(getAsTemplate().get().containsUnexpandedParameterPack() && |
| 485 | "Template template argument pack expansion without packs"); |
| 486 | ParsedTemplateArgument Result(*this); |
| 487 | Result.EllipsisLoc = EllipsisLoc; |
| 488 | return Result; |
| 489 | } |
| 490 | |
Douglas Gregor | 788cd06 | 2009-11-11 01:00:40 +0000 | [diff] [blame] | 491 | static TemplateArgumentLoc translateTemplateArgument(Sema &SemaRef, |
| 492 | const ParsedTemplateArgument &Arg) { |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 493 | |
Douglas Gregor | 788cd06 | 2009-11-11 01:00:40 +0000 | [diff] [blame] | 494 | switch (Arg.getKind()) { |
| 495 | case ParsedTemplateArgument::Type: { |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 496 | TypeSourceInfo *DI; |
Douglas Gregor | 788cd06 | 2009-11-11 01:00:40 +0000 | [diff] [blame] | 497 | QualType T = SemaRef.GetTypeFromParser(Arg.getAsType(), &DI); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 498 | if (!DI) |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 499 | DI = SemaRef.Context.getTrivialTypeSourceInfo(T, Arg.getLocation()); |
Douglas Gregor | 788cd06 | 2009-11-11 01:00:40 +0000 | [diff] [blame] | 500 | return TemplateArgumentLoc(TemplateArgument(T), DI); |
| 501 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 502 | |
Douglas Gregor | 788cd06 | 2009-11-11 01:00:40 +0000 | [diff] [blame] | 503 | case ParsedTemplateArgument::NonType: { |
| 504 | Expr *E = static_cast<Expr *>(Arg.getAsExpr()); |
| 505 | return TemplateArgumentLoc(TemplateArgument(E), E); |
| 506 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 507 | |
Douglas Gregor | 788cd06 | 2009-11-11 01:00:40 +0000 | [diff] [blame] | 508 | case ParsedTemplateArgument::Template: { |
John McCall | 2b5289b | 2010-08-23 07:28:44 +0000 | [diff] [blame] | 509 | TemplateName Template = Arg.getAsTemplate().get(); |
Douglas Gregor | 2be29f4 | 2011-01-14 23:41:42 +0000 | [diff] [blame] | 510 | TemplateArgument TArg; |
| 511 | if (Arg.getEllipsisLoc().isValid()) |
David Blaikie | dc84cd5 | 2013-02-20 22:23:23 +0000 | [diff] [blame] | 512 | TArg = TemplateArgument(Template, Optional<unsigned int>()); |
Douglas Gregor | 2be29f4 | 2011-01-14 23:41:42 +0000 | [diff] [blame] | 513 | else |
| 514 | TArg = Template; |
| 515 | return TemplateArgumentLoc(TArg, |
Douglas Gregor | b6744ef | 2011-03-02 17:09:35 +0000 | [diff] [blame] | 516 | Arg.getScopeSpec().getWithLocInContext( |
| 517 | SemaRef.Context), |
Douglas Gregor | ba68eca | 2011-01-05 17:40:24 +0000 | [diff] [blame] | 518 | Arg.getLocation(), |
| 519 | Arg.getEllipsisLoc()); |
Douglas Gregor | 788cd06 | 2009-11-11 01:00:40 +0000 | [diff] [blame] | 520 | } |
| 521 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 522 | |
Jeffrey Yasskin | 9f61aa9 | 2009-12-12 05:05:38 +0000 | [diff] [blame] | 523 | llvm_unreachable("Unhandled parsed template argument"); |
Douglas Gregor | 788cd06 | 2009-11-11 01:00:40 +0000 | [diff] [blame] | 524 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 525 | |
Douglas Gregor | 788cd06 | 2009-11-11 01:00:40 +0000 | [diff] [blame] | 526 | /// \brief Translates template arguments as provided by the parser |
| 527 | /// into template arguments used by semantic analysis. |
John McCall | d5532b6 | 2009-11-23 01:53:49 +0000 | [diff] [blame] | 528 | void Sema::translateTemplateArguments(const ASTTemplateArgsPtr &TemplateArgsIn, |
| 529 | TemplateArgumentListInfo &TemplateArgs) { |
Douglas Gregor | 788cd06 | 2009-11-11 01:00:40 +0000 | [diff] [blame] | 530 | for (unsigned I = 0, Last = TemplateArgsIn.size(); I != Last; ++I) |
John McCall | d5532b6 | 2009-11-23 01:53:49 +0000 | [diff] [blame] | 531 | TemplateArgs.addArgument(translateTemplateArgument(*this, |
| 532 | TemplateArgsIn[I])); |
Douglas Gregor | 788cd06 | 2009-11-11 01:00:40 +0000 | [diff] [blame] | 533 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 534 | |
Richard Smith | c7e863f | 2013-06-25 22:21:36 +0000 | [diff] [blame] | 535 | static void maybeDiagnoseTemplateParameterShadow(Sema &SemaRef, Scope *S, |
| 536 | SourceLocation Loc, |
| 537 | IdentifierInfo *Name) { |
| 538 | NamedDecl *PrevDecl = SemaRef.LookupSingleName( |
| 539 | S, Name, Loc, Sema::LookupOrdinaryName, Sema::ForRedeclaration); |
| 540 | if (PrevDecl && PrevDecl->isTemplateParameter()) |
| 541 | SemaRef.DiagnoseTemplateParameterShadow(Loc, PrevDecl); |
| 542 | } |
| 543 | |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 544 | /// ActOnTypeParameter - Called when a C++ template type parameter |
| 545 | /// (e.g., "typename T") has been parsed. Typename specifies whether |
| 546 | /// the keyword "typename" was used to declare the type parameter |
| 547 | /// (otherwise, "class" was used), and KeyLoc is the location of the |
| 548 | /// "class" or "typename" keyword. ParamName is the name of the |
| 549 | /// parameter (NULL indicates an unnamed template parameter) and |
Chandler Carruth | 4fb86f8 | 2011-05-01 00:51:33 +0000 | [diff] [blame] | 550 | /// ParamNameLoc is the location of the parameter name (if any). |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 551 | /// If the type parameter has a default argument, it will be added |
| 552 | /// later via ActOnTypeParameterDefault. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 553 | Decl *Sema::ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, |
| 554 | SourceLocation EllipsisLoc, |
| 555 | SourceLocation KeyLoc, |
| 556 | IdentifierInfo *ParamName, |
| 557 | SourceLocation ParamNameLoc, |
| 558 | unsigned Depth, unsigned Position, |
| 559 | SourceLocation EqualLoc, |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 560 | ParsedType DefaultArg) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 561 | assert(S->isTemplateParamScope() && |
| 562 | "Template type parameter not in template parameter scope!"); |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 563 | bool Invalid = false; |
| 564 | |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 565 | SourceLocation Loc = ParamNameLoc; |
| 566 | if (!ParamName) |
| 567 | Loc = KeyLoc; |
| 568 | |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 569 | TemplateTypeParmDecl *Param |
John McCall | 7a9813c | 2010-01-22 00:28:27 +0000 | [diff] [blame] | 570 | = TemplateTypeParmDecl::Create(Context, Context.getTranslationUnitDecl(), |
Abramo Bagnara | 344577e | 2011-03-06 15:48:19 +0000 | [diff] [blame] | 571 | KeyLoc, Loc, Depth, Position, ParamName, |
| 572 | Typename, Ellipsis); |
Douglas Gregor | 9a299e0 | 2011-03-04 17:52:15 +0000 | [diff] [blame] | 573 | Param->setAccess(AS_public); |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 574 | if (Invalid) |
| 575 | Param->setInvalidDecl(); |
| 576 | |
| 577 | if (ParamName) { |
Richard Smith | c7e863f | 2013-06-25 22:21:36 +0000 | [diff] [blame] | 578 | maybeDiagnoseTemplateParameterShadow(*this, S, ParamNameLoc, ParamName); |
| 579 | |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 580 | // Add the template parameter into the current scope. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 581 | S->AddDecl(Param); |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 582 | IdResolver.AddDecl(Param); |
| 583 | } |
| 584 | |
Douglas Gregor | 61c4d28 | 2011-01-05 15:48:55 +0000 | [diff] [blame] | 585 | // C++0x [temp.param]p9: |
| 586 | // A default template-argument may be specified for any kind of |
| 587 | // template-parameter that is not a template parameter pack. |
| 588 | if (DefaultArg && Ellipsis) { |
| 589 | Diag(EqualLoc, diag::err_template_param_pack_default_arg); |
| 590 | DefaultArg = ParsedType(); |
| 591 | } |
| 592 | |
Douglas Gregor | bb3310a | 2010-07-01 00:00:45 +0000 | [diff] [blame] | 593 | // Handle the default argument, if provided. |
| 594 | if (DefaultArg) { |
| 595 | TypeSourceInfo *DefaultTInfo; |
| 596 | GetTypeFromParser(DefaultArg, &DefaultTInfo); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 597 | |
Douglas Gregor | bb3310a | 2010-07-01 00:00:45 +0000 | [diff] [blame] | 598 | assert(DefaultTInfo && "expected source information for type"); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 599 | |
Douglas Gregor | 6f52675 | 2010-12-16 08:48:57 +0000 | [diff] [blame] | 600 | // Check for unexpanded parameter packs. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 601 | if (DiagnoseUnexpandedParameterPack(Loc, DefaultTInfo, |
Douglas Gregor | 6f52675 | 2010-12-16 08:48:57 +0000 | [diff] [blame] | 602 | UPPC_DefaultArgument)) |
| 603 | return Param; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 604 | |
Douglas Gregor | bb3310a | 2010-07-01 00:00:45 +0000 | [diff] [blame] | 605 | // Check the template argument itself. |
| 606 | if (CheckTemplateArgument(Param, DefaultTInfo)) { |
| 607 | Param->setInvalidDecl(); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 608 | return Param; |
Douglas Gregor | bb3310a | 2010-07-01 00:00:45 +0000 | [diff] [blame] | 609 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 610 | |
Douglas Gregor | bb3310a | 2010-07-01 00:00:45 +0000 | [diff] [blame] | 611 | Param->setDefaultArgument(DefaultTInfo, false); |
| 612 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 613 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 614 | return Param; |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 615 | } |
| 616 | |
Douglas Gregor | 2943aed | 2009-03-03 04:44:36 +0000 | [diff] [blame] | 617 | /// \brief Check that the type of a non-type template parameter is |
| 618 | /// well-formed. |
| 619 | /// |
| 620 | /// \returns the (possibly-promoted) parameter type if valid; |
| 621 | /// otherwise, produces a diagnostic and returns a NULL type. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 622 | QualType |
Douglas Gregor | 2943aed | 2009-03-03 04:44:36 +0000 | [diff] [blame] | 623 | Sema::CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc) { |
Douglas Gregor | a481ec4 | 2010-05-23 19:57:01 +0000 | [diff] [blame] | 624 | // We don't allow variably-modified types as the type of non-type template |
| 625 | // parameters. |
| 626 | if (T->isVariablyModifiedType()) { |
| 627 | Diag(Loc, diag::err_variably_modified_nontype_template_param) |
| 628 | << T; |
| 629 | return QualType(); |
| 630 | } |
| 631 | |
Douglas Gregor | 2943aed | 2009-03-03 04:44:36 +0000 | [diff] [blame] | 632 | // C++ [temp.param]p4: |
| 633 | // |
| 634 | // A non-type template-parameter shall have one of the following |
| 635 | // (optionally cv-qualified) types: |
| 636 | // |
| 637 | // -- integral or enumeration type, |
Douglas Gregor | 2ade35e | 2010-06-16 00:17:44 +0000 | [diff] [blame] | 638 | if (T->isIntegralOrEnumerationType() || |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 639 | // -- pointer to object or pointer to function, |
Eli Friedman | 1357869 | 2010-08-05 02:49:48 +0000 | [diff] [blame] | 640 | T->isPointerType() || |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 641 | // -- reference to object or reference to function, |
Douglas Gregor | 2943aed | 2009-03-03 04:44:36 +0000 | [diff] [blame] | 642 | T->isReferenceType() || |
Douglas Gregor | 84ee2ee | 2011-05-21 23:15:46 +0000 | [diff] [blame] | 643 | // -- pointer to member, |
Douglas Gregor | 2943aed | 2009-03-03 04:44:36 +0000 | [diff] [blame] | 644 | T->isMemberPointerType() || |
Douglas Gregor | 84ee2ee | 2011-05-21 23:15:46 +0000 | [diff] [blame] | 645 | // -- std::nullptr_t. |
| 646 | T->isNullPtrType() || |
Douglas Gregor | 2943aed | 2009-03-03 04:44:36 +0000 | [diff] [blame] | 647 | // If T is a dependent type, we can't do the check now, so we |
| 648 | // assume that it is well-formed. |
Richard Smith | e37f484 | 2012-03-13 07:21:50 +0000 | [diff] [blame] | 649 | T->isDependentType()) { |
| 650 | // C++ [temp.param]p5: The top-level cv-qualifiers on the template-parameter |
| 651 | // are ignored when determining its type. |
| 652 | return T.getUnqualifiedType(); |
| 653 | } |
| 654 | |
Douglas Gregor | 2943aed | 2009-03-03 04:44:36 +0000 | [diff] [blame] | 655 | // C++ [temp.param]p8: |
| 656 | // |
| 657 | // A non-type template-parameter of type "array of T" or |
| 658 | // "function returning T" is adjusted to be of type "pointer to |
| 659 | // T" or "pointer to function returning T", respectively. |
| 660 | else if (T->isArrayType()) |
| 661 | // FIXME: Keep the type prior to promotion? |
| 662 | return Context.getArrayDecayedType(T); |
| 663 | else if (T->isFunctionType()) |
| 664 | // FIXME: Keep the type prior to promotion? |
| 665 | return Context.getPointerType(T); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 666 | |
Douglas Gregor | 2943aed | 2009-03-03 04:44:36 +0000 | [diff] [blame] | 667 | Diag(Loc, diag::err_template_nontype_parm_bad_type) |
| 668 | << T; |
| 669 | |
| 670 | return QualType(); |
| 671 | } |
| 672 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 673 | Decl *Sema::ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, |
| 674 | unsigned Depth, |
| 675 | unsigned Position, |
| 676 | SourceLocation EqualLoc, |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 677 | Expr *Default) { |
John McCall | bf1a028 | 2010-06-04 23:28:52 +0000 | [diff] [blame] | 678 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); |
| 679 | QualType T = TInfo->getType(); |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 680 | |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 681 | assert(S->isTemplateParamScope() && |
| 682 | "Non-type template parameter not in template parameter scope!"); |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 683 | bool Invalid = false; |
| 684 | |
Douglas Gregor | 4d2abba | 2010-12-16 15:36:43 +0000 | [diff] [blame] | 685 | T = CheckNonTypeTemplateParameterType(T, D.getIdentifierLoc()); |
| 686 | if (T.isNull()) { |
Douglas Gregor | 2943aed | 2009-03-03 04:44:36 +0000 | [diff] [blame] | 687 | T = Context.IntTy; // Recover with an 'int' type. |
Douglas Gregor | ceef30c | 2009-03-09 16:46:39 +0000 | [diff] [blame] | 688 | Invalid = true; |
| 689 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 690 | |
Richard Smith | c7e863f | 2013-06-25 22:21:36 +0000 | [diff] [blame] | 691 | IdentifierInfo *ParamName = D.getIdentifier(); |
Douglas Gregor | 10738d3 | 2010-12-23 23:51:58 +0000 | [diff] [blame] | 692 | bool IsParameterPack = D.hasEllipsis(); |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 693 | NonTypeTemplateParmDecl *Param |
John McCall | 7a9813c | 2010-01-22 00:28:27 +0000 | [diff] [blame] | 694 | = NonTypeTemplateParmDecl::Create(Context, Context.getTranslationUnitDecl(), |
Daniel Dunbar | 96a0014 | 2012-03-09 18:35:03 +0000 | [diff] [blame] | 695 | D.getLocStart(), |
John McCall | 7a9813c | 2010-01-22 00:28:27 +0000 | [diff] [blame] | 696 | D.getIdentifierLoc(), |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 697 | Depth, Position, ParamName, T, |
Douglas Gregor | 10738d3 | 2010-12-23 23:51:58 +0000 | [diff] [blame] | 698 | IsParameterPack, TInfo); |
Douglas Gregor | 9a299e0 | 2011-03-04 17:52:15 +0000 | [diff] [blame] | 699 | Param->setAccess(AS_public); |
Richard Smith | c7e863f | 2013-06-25 22:21:36 +0000 | [diff] [blame] | 700 | |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 701 | if (Invalid) |
| 702 | Param->setInvalidDecl(); |
| 703 | |
Richard Smith | c7e863f | 2013-06-25 22:21:36 +0000 | [diff] [blame] | 704 | if (ParamName) { |
| 705 | maybeDiagnoseTemplateParameterShadow(*this, S, D.getIdentifierLoc(), |
| 706 | ParamName); |
| 707 | |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 708 | // Add the template parameter into the current scope. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 709 | S->AddDecl(Param); |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 710 | IdResolver.AddDecl(Param); |
| 711 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 712 | |
Douglas Gregor | 61c4d28 | 2011-01-05 15:48:55 +0000 | [diff] [blame] | 713 | // C++0x [temp.param]p9: |
| 714 | // A default template-argument may be specified for any kind of |
| 715 | // template-parameter that is not a template parameter pack. |
| 716 | if (Default && IsParameterPack) { |
| 717 | Diag(EqualLoc, diag::err_template_param_pack_default_arg); |
| 718 | Default = 0; |
| 719 | } |
| 720 | |
Douglas Gregor | bb3310a | 2010-07-01 00:00:45 +0000 | [diff] [blame] | 721 | // Check the well-formedness of the default template argument, if provided. |
Douglas Gregor | 10738d3 | 2010-12-23 23:51:58 +0000 | [diff] [blame] | 722 | if (Default) { |
Douglas Gregor | 6f52675 | 2010-12-16 08:48:57 +0000 | [diff] [blame] | 723 | // Check for unexpanded parameter packs. |
| 724 | if (DiagnoseUnexpandedParameterPack(Default, UPPC_DefaultArgument)) |
| 725 | return Param; |
| 726 | |
Douglas Gregor | bb3310a | 2010-07-01 00:00:45 +0000 | [diff] [blame] | 727 | TemplateArgument Converted; |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 728 | ExprResult DefaultRes = CheckTemplateArgument(Param, Param->getType(), Default, Converted); |
| 729 | if (DefaultRes.isInvalid()) { |
Douglas Gregor | bb3310a | 2010-07-01 00:00:45 +0000 | [diff] [blame] | 730 | Param->setInvalidDecl(); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 731 | return Param; |
Douglas Gregor | bb3310a | 2010-07-01 00:00:45 +0000 | [diff] [blame] | 732 | } |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 733 | Default = DefaultRes.take(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 734 | |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 735 | Param->setDefaultArgument(Default, false); |
Douglas Gregor | bb3310a | 2010-07-01 00:00:45 +0000 | [diff] [blame] | 736 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 737 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 738 | return Param; |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 739 | } |
Douglas Gregor | c4b4e7b | 2008-12-24 02:52:09 +0000 | [diff] [blame] | 740 | |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 741 | /// ActOnTemplateTemplateParameter - Called when a C++ template template |
James Dennett | 699c904 | 2012-06-15 07:13:21 +0000 | [diff] [blame] | 742 | /// parameter (e.g. T in template <template \<typename> class T> class array) |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 743 | /// has been parsed. S is the current scope. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 744 | Decl *Sema::ActOnTemplateTemplateParameter(Scope* S, |
| 745 | SourceLocation TmpLoc, |
Richard Trieu | 90ab75b | 2011-09-09 03:18:59 +0000 | [diff] [blame] | 746 | TemplateParameterList *Params, |
Douglas Gregor | 61c4d28 | 2011-01-05 15:48:55 +0000 | [diff] [blame] | 747 | SourceLocation EllipsisLoc, |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 748 | IdentifierInfo *Name, |
| 749 | SourceLocation NameLoc, |
| 750 | unsigned Depth, |
| 751 | unsigned Position, |
| 752 | SourceLocation EqualLoc, |
Douglas Gregor | 61c4d28 | 2011-01-05 15:48:55 +0000 | [diff] [blame] | 753 | ParsedTemplateArgument Default) { |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 754 | assert(S->isTemplateParamScope() && |
| 755 | "Template template parameter not in template parameter scope!"); |
| 756 | |
| 757 | // Construct the parameter object. |
Douglas Gregor | 61c4d28 | 2011-01-05 15:48:55 +0000 | [diff] [blame] | 758 | bool IsParameterPack = EllipsisLoc.isValid(); |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 759 | TemplateTemplateParmDecl *Param = |
John McCall | 7a9813c | 2010-01-22 00:28:27 +0000 | [diff] [blame] | 760 | TemplateTemplateParmDecl::Create(Context, Context.getTranslationUnitDecl(), |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 761 | NameLoc.isInvalid()? TmpLoc : NameLoc, |
| 762 | Depth, Position, IsParameterPack, |
Douglas Gregor | 61c4d28 | 2011-01-05 15:48:55 +0000 | [diff] [blame] | 763 | Name, Params); |
Douglas Gregor | 9a299e0 | 2011-03-04 17:52:15 +0000 | [diff] [blame] | 764 | Param->setAccess(AS_public); |
| 765 | |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 766 | // If the template template parameter has a name, then link the identifier |
Douglas Gregor | bb3310a | 2010-07-01 00:00:45 +0000 | [diff] [blame] | 767 | // into the scope and lookup mechanisms. |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 768 | if (Name) { |
Richard Smith | c7e863f | 2013-06-25 22:21:36 +0000 | [diff] [blame] | 769 | maybeDiagnoseTemplateParameterShadow(*this, S, NameLoc, Name); |
| 770 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 771 | S->AddDecl(Param); |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 772 | IdResolver.AddDecl(Param); |
| 773 | } |
| 774 | |
Douglas Gregor | 6f52675 | 2010-12-16 08:48:57 +0000 | [diff] [blame] | 775 | if (Params->size() == 0) { |
| 776 | Diag(Param->getLocation(), diag::err_template_template_parm_no_parms) |
| 777 | << SourceRange(Params->getLAngleLoc(), Params->getRAngleLoc()); |
| 778 | Param->setInvalidDecl(); |
| 779 | } |
| 780 | |
Douglas Gregor | 61c4d28 | 2011-01-05 15:48:55 +0000 | [diff] [blame] | 781 | // C++0x [temp.param]p9: |
| 782 | // A default template-argument may be specified for any kind of |
| 783 | // template-parameter that is not a template parameter pack. |
| 784 | if (IsParameterPack && !Default.isInvalid()) { |
| 785 | Diag(EqualLoc, diag::err_template_param_pack_default_arg); |
| 786 | Default = ParsedTemplateArgument(); |
| 787 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 788 | |
Douglas Gregor | bb3310a | 2010-07-01 00:00:45 +0000 | [diff] [blame] | 789 | if (!Default.isInvalid()) { |
| 790 | // Check only that we have a template template argument. We don't want to |
| 791 | // try to check well-formedness now, because our template template parameter |
| 792 | // might have dependent types in its template parameters, which we wouldn't |
| 793 | // be able to match now. |
| 794 | // |
| 795 | // If none of the template template parameter's template arguments mention |
| 796 | // other template parameters, we could actually perform more checking here. |
| 797 | // However, it isn't worth doing. |
| 798 | TemplateArgumentLoc DefaultArg = translateTemplateArgument(*this, Default); |
| 799 | if (DefaultArg.getArgument().getAsTemplate().isNull()) { |
| 800 | Diag(DefaultArg.getLocation(), diag::err_template_arg_not_class_template) |
| 801 | << DefaultArg.getSourceRange(); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 802 | return Param; |
Douglas Gregor | bb3310a | 2010-07-01 00:00:45 +0000 | [diff] [blame] | 803 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 804 | |
Douglas Gregor | 6f52675 | 2010-12-16 08:48:57 +0000 | [diff] [blame] | 805 | // Check for unexpanded parameter packs. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 806 | if (DiagnoseUnexpandedParameterPack(DefaultArg.getLocation(), |
Douglas Gregor | 6f52675 | 2010-12-16 08:48:57 +0000 | [diff] [blame] | 807 | DefaultArg.getArgument().getAsTemplate(), |
| 808 | UPPC_DefaultArgument)) |
| 809 | return Param; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 810 | |
Douglas Gregor | bb3310a | 2010-07-01 00:00:45 +0000 | [diff] [blame] | 811 | Param->setDefaultArgument(DefaultArg, false); |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 812 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 813 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 814 | return Param; |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 815 | } |
| 816 | |
Douglas Gregor | c4b4e7b | 2008-12-24 02:52:09 +0000 | [diff] [blame] | 817 | /// ActOnTemplateParameterList - Builds a TemplateParameterList that |
| 818 | /// contains the template parameters in Params/NumParams. |
Richard Trieu | 90ab75b | 2011-09-09 03:18:59 +0000 | [diff] [blame] | 819 | TemplateParameterList * |
Douglas Gregor | c4b4e7b | 2008-12-24 02:52:09 +0000 | [diff] [blame] | 820 | Sema::ActOnTemplateParameterList(unsigned Depth, |
| 821 | SourceLocation ExportLoc, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 822 | SourceLocation TemplateLoc, |
Douglas Gregor | c4b4e7b | 2008-12-24 02:52:09 +0000 | [diff] [blame] | 823 | SourceLocation LAngleLoc, |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 824 | Decl **Params, unsigned NumParams, |
Douglas Gregor | c4b4e7b | 2008-12-24 02:52:09 +0000 | [diff] [blame] | 825 | SourceLocation RAngleLoc) { |
| 826 | if (ExportLoc.isValid()) |
Douglas Gregor | 51ffb0c | 2009-11-25 18:55:14 +0000 | [diff] [blame] | 827 | Diag(ExportLoc, diag::warn_template_export_unsupported); |
Douglas Gregor | c4b4e7b | 2008-12-24 02:52:09 +0000 | [diff] [blame] | 828 | |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 829 | return TemplateParameterList::Create(Context, TemplateLoc, LAngleLoc, |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 830 | (NamedDecl**)Params, NumParams, |
Douglas Gregor | bf4ea56 | 2009-09-15 16:23:51 +0000 | [diff] [blame] | 831 | RAngleLoc); |
Douglas Gregor | c4b4e7b | 2008-12-24 02:52:09 +0000 | [diff] [blame] | 832 | } |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 833 | |
John McCall | b621766 | 2010-03-15 10:12:16 +0000 | [diff] [blame] | 834 | static void SetNestedNameSpecifier(TagDecl *T, const CXXScopeSpec &SS) { |
| 835 | if (SS.isSet()) |
Douglas Gregor | c22b5ff | 2011-02-25 02:25:35 +0000 | [diff] [blame] | 836 | T->setQualifierInfo(SS.getWithLocInContext(T->getASTContext())); |
John McCall | b621766 | 2010-03-15 10:12:16 +0000 | [diff] [blame] | 837 | } |
| 838 | |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 839 | DeclResult |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 840 | Sema::CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, |
Jeffrey Yasskin | 9ab1454 | 2010-04-08 16:38:48 +0000 | [diff] [blame] | 841 | SourceLocation KWLoc, CXXScopeSpec &SS, |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 842 | IdentifierInfo *Name, SourceLocation NameLoc, |
| 843 | AttributeList *Attr, |
Douglas Gregor | 05396e2 | 2009-08-25 17:23:04 +0000 | [diff] [blame] | 844 | TemplateParameterList *TemplateParams, |
Douglas Gregor | e761230 | 2011-09-09 19:05:14 +0000 | [diff] [blame] | 845 | AccessSpecifier AS, SourceLocation ModulePrivateLoc, |
Abramo Bagnara | c57c17d | 2011-03-10 13:28:31 +0000 | [diff] [blame] | 846 | unsigned NumOuterTemplateParamLists, |
| 847 | TemplateParameterList** OuterTemplateParamLists) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 848 | assert(TemplateParams && TemplateParams->size() > 0 && |
Douglas Gregor | 05396e2 | 2009-08-25 17:23:04 +0000 | [diff] [blame] | 849 | "No template parameters"); |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 850 | assert(TUK != TUK_Reference && "Can only declare or define class templates"); |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 851 | bool Invalid = false; |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 852 | |
| 853 | // Check that we can declare a template here. |
Douglas Gregor | 05396e2 | 2009-08-25 17:23:04 +0000 | [diff] [blame] | 854 | if (CheckTemplateDeclScope(S, TemplateParams)) |
Douglas Gregor | 212e81c | 2009-03-25 00:13:59 +0000 | [diff] [blame] | 855 | return true; |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 856 | |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 857 | TagTypeKind Kind = TypeWithKeyword::getTagTypeKindForTypeSpec(TagSpec); |
| 858 | assert(Kind != TTK_Enum && "can't build template of enumerated type"); |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 859 | |
| 860 | // There is no such thing as an unnamed class template. |
| 861 | if (!Name) { |
| 862 | Diag(KWLoc, diag::err_template_unnamed_class); |
Douglas Gregor | 212e81c | 2009-03-25 00:13:59 +0000 | [diff] [blame] | 863 | return true; |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 864 | } |
| 865 | |
Richard Smith | 71c598f | 2012-04-21 01:27:54 +0000 | [diff] [blame] | 866 | // Find any previous declaration with this name. For a friend with no |
| 867 | // scope explicitly specified, we only look for tag declarations (per |
| 868 | // C++11 [basic.lookup.elab]p2). |
Douglas Gregor | 05396e2 | 2009-08-25 17:23:04 +0000 | [diff] [blame] | 869 | DeclContext *SemanticContext; |
Richard Smith | 71c598f | 2012-04-21 01:27:54 +0000 | [diff] [blame] | 870 | LookupResult Previous(*this, Name, NameLoc, |
| 871 | (SS.isEmpty() && TUK == TUK_Friend) |
| 872 | ? LookupTagName : LookupOrdinaryName, |
John McCall | 7d384dd | 2009-11-18 07:57:50 +0000 | [diff] [blame] | 873 | ForRedeclaration); |
Douglas Gregor | 05396e2 | 2009-08-25 17:23:04 +0000 | [diff] [blame] | 874 | if (SS.isNotEmpty() && !SS.isInvalid()) { |
| 875 | SemanticContext = computeDeclContext(SS, true); |
| 876 | if (!SemanticContext) { |
Douglas Gregor | 8b0fa52 | 2012-03-30 16:20:47 +0000 | [diff] [blame] | 877 | // FIXME: Horrible, horrible hack! We can't currently represent this |
| 878 | // in the AST, and historically we have just ignored such friend |
| 879 | // class templates, so don't complain here. |
| 880 | if (TUK != TUK_Friend) |
| 881 | Diag(NameLoc, diag::err_template_qualified_declarator_no_match) |
| 882 | << SS.getScopeRep() << SS.getRange(); |
Douglas Gregor | 05396e2 | 2009-08-25 17:23:04 +0000 | [diff] [blame] | 883 | return true; |
| 884 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 885 | |
John McCall | 77bb1aa | 2010-05-01 00:40:08 +0000 | [diff] [blame] | 886 | if (RequireCompleteDeclContext(SS, SemanticContext)) |
| 887 | return true; |
| 888 | |
Douglas Gregor | 2060650 | 2011-10-14 15:31:12 +0000 | [diff] [blame] | 889 | // If we're adding a template to a dependent context, we may need to |
| 890 | // rebuilding some of the types used within the template parameter list, |
| 891 | // now that we know what the current instantiation is. |
| 892 | if (SemanticContext->isDependentContext()) { |
| 893 | ContextRAII SavedContext(*this, SemanticContext); |
| 894 | if (RebuildTemplateParamsInCurrentInstantiation(TemplateParams)) |
| 895 | Invalid = true; |
Douglas Gregor | 6960587 | 2012-03-28 16:01:27 +0000 | [diff] [blame] | 896 | } else if (TUK != TUK_Friend && TUK != TUK_Reference) |
| 897 | diagnoseQualifiedDeclaration(SS, SemanticContext, Name, NameLoc); |
Richard Smith | 71c598f | 2012-04-21 01:27:54 +0000 | [diff] [blame] | 898 | |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 899 | LookupQualifiedName(Previous, SemanticContext); |
Douglas Gregor | 05396e2 | 2009-08-25 17:23:04 +0000 | [diff] [blame] | 900 | } else { |
| 901 | SemanticContext = CurContext; |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 902 | LookupName(Previous, S); |
Douglas Gregor | 05396e2 | 2009-08-25 17:23:04 +0000 | [diff] [blame] | 903 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 904 | |
Douglas Gregor | 57265e3 | 2010-04-12 16:00:01 +0000 | [diff] [blame] | 905 | if (Previous.isAmbiguous()) |
| 906 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 907 | |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 908 | NamedDecl *PrevDecl = 0; |
| 909 | if (Previous.begin() != Previous.end()) |
Douglas Gregor | 57265e3 | 2010-04-12 16:00:01 +0000 | [diff] [blame] | 910 | PrevDecl = (*Previous.begin())->getUnderlyingDecl(); |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 911 | |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 912 | // If there is a previous declaration with the same name, check |
| 913 | // whether this is a valid redeclaration. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 914 | ClassTemplateDecl *PrevClassTemplate |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 915 | = dyn_cast_or_null<ClassTemplateDecl>(PrevDecl); |
Douglas Gregor | d7e5bdb | 2009-10-09 21:11:42 +0000 | [diff] [blame] | 916 | |
| 917 | // We may have found the injected-class-name of a class template, |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 918 | // class template partial specialization, or class template specialization. |
Douglas Gregor | d7e5bdb | 2009-10-09 21:11:42 +0000 | [diff] [blame] | 919 | // In these cases, grab the template that is being defined or specialized. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 920 | if (!PrevClassTemplate && PrevDecl && isa<CXXRecordDecl>(PrevDecl) && |
Douglas Gregor | d7e5bdb | 2009-10-09 21:11:42 +0000 | [diff] [blame] | 921 | cast<CXXRecordDecl>(PrevDecl)->isInjectedClassName()) { |
| 922 | PrevDecl = cast<CXXRecordDecl>(PrevDecl->getDeclContext()); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 923 | PrevClassTemplate |
Douglas Gregor | d7e5bdb | 2009-10-09 21:11:42 +0000 | [diff] [blame] | 924 | = cast<CXXRecordDecl>(PrevDecl)->getDescribedClassTemplate(); |
| 925 | if (!PrevClassTemplate && isa<ClassTemplateSpecializationDecl>(PrevDecl)) { |
| 926 | PrevClassTemplate |
| 927 | = cast<ClassTemplateSpecializationDecl>(PrevDecl) |
| 928 | ->getSpecializedTemplate(); |
| 929 | } |
| 930 | } |
| 931 | |
John McCall | 65c4946 | 2009-12-18 11:25:59 +0000 | [diff] [blame] | 932 | if (TUK == TUK_Friend) { |
John McCall | e129d44 | 2009-12-17 23:21:11 +0000 | [diff] [blame] | 933 | // C++ [namespace.memdef]p3: |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 934 | // [...] When looking for a prior declaration of a class or a function |
| 935 | // declared as a friend, and when the name of the friend class or |
John McCall | e129d44 | 2009-12-17 23:21:11 +0000 | [diff] [blame] | 936 | // function is neither a qualified name nor a template-id, scopes outside |
| 937 | // the innermost enclosing namespace scope are not considered. |
Douglas Gregor | c1c9df7 | 2010-04-18 17:37:40 +0000 | [diff] [blame] | 938 | if (!SS.isSet()) { |
| 939 | DeclContext *OutermostContext = CurContext; |
| 940 | while (!OutermostContext->isFileContext()) |
| 941 | OutermostContext = OutermostContext->getLookupParent(); |
John McCall | 65c4946 | 2009-12-18 11:25:59 +0000 | [diff] [blame] | 942 | |
Richard Smith | c93e014 | 2012-04-20 07:12:26 +0000 | [diff] [blame] | 943 | if (PrevDecl && |
Douglas Gregor | c1c9df7 | 2010-04-18 17:37:40 +0000 | [diff] [blame] | 944 | (OutermostContext->Equals(PrevDecl->getDeclContext()) || |
| 945 | OutermostContext->Encloses(PrevDecl->getDeclContext()))) { |
| 946 | SemanticContext = PrevDecl->getDeclContext(); |
| 947 | } else { |
| 948 | // Declarations in outer scopes don't matter. However, the outermost |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 949 | // context we computed is the semantic context for our new |
Douglas Gregor | c1c9df7 | 2010-04-18 17:37:40 +0000 | [diff] [blame] | 950 | // declaration. |
| 951 | PrevDecl = PrevClassTemplate = 0; |
| 952 | SemanticContext = OutermostContext; |
Richard Smith | 71c598f | 2012-04-21 01:27:54 +0000 | [diff] [blame] | 953 | |
| 954 | // Check that the chosen semantic context doesn't already contain a |
| 955 | // declaration of this name as a non-tag type. |
| 956 | LookupResult Previous(*this, Name, NameLoc, LookupOrdinaryName, |
| 957 | ForRedeclaration); |
| 958 | DeclContext *LookupContext = SemanticContext; |
| 959 | while (LookupContext->isTransparentContext()) |
| 960 | LookupContext = LookupContext->getLookupParent(); |
| 961 | LookupQualifiedName(Previous, LookupContext); |
| 962 | |
| 963 | if (Previous.isAmbiguous()) |
| 964 | return true; |
| 965 | |
| 966 | if (Previous.begin() != Previous.end()) |
| 967 | PrevDecl = (*Previous.begin())->getUnderlyingDecl(); |
Douglas Gregor | c1c9df7 | 2010-04-18 17:37:40 +0000 | [diff] [blame] | 968 | } |
John McCall | e129d44 | 2009-12-17 23:21:11 +0000 | [diff] [blame] | 969 | } |
John McCall | e129d44 | 2009-12-17 23:21:11 +0000 | [diff] [blame] | 970 | } else if (PrevDecl && !isDeclInScope(PrevDecl, SemanticContext, S)) |
| 971 | PrevDecl = PrevClassTemplate = 0; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 972 | |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 973 | if (PrevClassTemplate) { |
Richard Smith | 6e21b16 | 2012-04-22 02:13:50 +0000 | [diff] [blame] | 974 | // Ensure that the template parameter lists are compatible. Skip this check |
| 975 | // for a friend in a dependent context: the template parameter list itself |
| 976 | // could be dependent. |
| 977 | if (!(TUK == TUK_Friend && CurContext->isDependentContext()) && |
| 978 | !TemplateParameterListsAreEqual(TemplateParams, |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 979 | PrevClassTemplate->getTemplateParameters(), |
Douglas Gregor | fb898e1 | 2009-11-12 16:20:59 +0000 | [diff] [blame] | 980 | /*Complain=*/true, |
| 981 | TPL_TemplateMatch)) |
Douglas Gregor | 212e81c | 2009-03-25 00:13:59 +0000 | [diff] [blame] | 982 | return true; |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 983 | |
| 984 | // C++ [temp.class]p4: |
| 985 | // In a redeclaration, partial specialization, explicit |
| 986 | // specialization or explicit instantiation of a class template, |
| 987 | // the class-key shall agree in kind with the original class |
| 988 | // template declaration (7.1.5.3). |
| 989 | RecordDecl *PrevRecordDecl = PrevClassTemplate->getTemplatedDecl(); |
Richard Trieu | bbf34c0 | 2011-06-10 03:11:26 +0000 | [diff] [blame] | 990 | if (!isAcceptableTagRedeclaration(PrevRecordDecl, Kind, |
| 991 | TUK == TUK_Definition, KWLoc, *Name)) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 992 | Diag(KWLoc, diag::err_use_with_wrong_tag) |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 993 | << Name |
Douglas Gregor | 849b243 | 2010-03-31 17:46:05 +0000 | [diff] [blame] | 994 | << FixItHint::CreateReplacement(KWLoc, PrevRecordDecl->getKindName()); |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 995 | Diag(PrevRecordDecl->getLocation(), diag::note_previous_use); |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 996 | Kind = PrevRecordDecl->getTagKind(); |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 997 | } |
| 998 | |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 999 | // Check for redefinition of this class template. |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 1000 | if (TUK == TUK_Definition) { |
Douglas Gregor | 952b017 | 2010-02-11 01:04:33 +0000 | [diff] [blame] | 1001 | if (TagDecl *Def = PrevRecordDecl->getDefinition()) { |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 1002 | Diag(NameLoc, diag::err_redefinition) << Name; |
| 1003 | Diag(Def->getLocation(), diag::note_previous_definition); |
| 1004 | // FIXME: Would it make sense to try to "forget" the previous |
| 1005 | // definition, as part of error recovery? |
Douglas Gregor | 212e81c | 2009-03-25 00:13:59 +0000 | [diff] [blame] | 1006 | return true; |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 1007 | } |
Douglas Gregor | 6311d2b | 2011-09-09 18:32:39 +0000 | [diff] [blame] | 1008 | } |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 1009 | } else if (PrevDecl && PrevDecl->isTemplateParameter()) { |
| 1010 | // Maybe we will complain about the shadowed template parameter. |
| 1011 | DiagnoseTemplateParameterShadow(NameLoc, PrevDecl); |
| 1012 | // Just pretend that we didn't see the previous declaration. |
| 1013 | PrevDecl = 0; |
| 1014 | } else if (PrevDecl) { |
| 1015 | // C++ [temp]p5: |
| 1016 | // A class template shall not have the same name as any other |
| 1017 | // template, class, function, object, enumeration, enumerator, |
| 1018 | // namespace, or type in the same scope (3.3), except as specified |
| 1019 | // in (14.5.4). |
| 1020 | Diag(NameLoc, diag::err_redefinition_different_kind) << Name; |
| 1021 | Diag(PrevDecl->getLocation(), diag::note_previous_definition); |
Douglas Gregor | 212e81c | 2009-03-25 00:13:59 +0000 | [diff] [blame] | 1022 | return true; |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 1023 | } |
| 1024 | |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1025 | // Check the template parameter list of this declaration, possibly |
| 1026 | // merging in the template parameter list from the previous class |
Richard Smith | 6e21b16 | 2012-04-22 02:13:50 +0000 | [diff] [blame] | 1027 | // template declaration. Skip this check for a friend in a dependent |
| 1028 | // context, because the template parameter list might be dependent. |
| 1029 | if (!(TUK == TUK_Friend && CurContext->isDependentContext()) && |
David Majnemer | 87b12b2 | 2013-06-25 22:08:55 +0000 | [diff] [blame] | 1030 | CheckTemplateParameterList( |
| 1031 | TemplateParams, |
| 1032 | PrevClassTemplate ? PrevClassTemplate->getTemplateParameters() : 0, |
| 1033 | (SS.isSet() && SemanticContext && SemanticContext->isRecord() && |
| 1034 | SemanticContext->isDependentContext()) |
| 1035 | ? TPC_ClassTemplateMember |
| 1036 | : TUK == TUK_Friend ? TPC_FriendClassTemplate |
| 1037 | : TPC_ClassTemplate)) |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1038 | Invalid = true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1039 | |
Douglas Gregor | 57265e3 | 2010-04-12 16:00:01 +0000 | [diff] [blame] | 1040 | if (SS.isSet()) { |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1041 | // If the name of the template was qualified, we must be defining the |
Douglas Gregor | 57265e3 | 2010-04-12 16:00:01 +0000 | [diff] [blame] | 1042 | // template out-of-line. |
Richard Smith | 6e21b16 | 2012-04-22 02:13:50 +0000 | [diff] [blame] | 1043 | if (!SS.isInvalid() && !Invalid && !PrevClassTemplate) { |
| 1044 | Diag(NameLoc, TUK == TUK_Friend ? diag::err_friend_decl_does_not_match |
Richard Smith | 4e9686b | 2013-08-09 04:35:01 +0000 | [diff] [blame] | 1045 | : diag::err_member_decl_does_not_match) |
| 1046 | << Name << SemanticContext << /*IsDefinition*/true << SS.getRange(); |
Douglas Gregor | ea9f54a | 2011-11-01 21:35:16 +0000 | [diff] [blame] | 1047 | Invalid = true; |
| 1048 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1049 | } |
| 1050 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1051 | CXXRecordDecl *NewClass = |
Abramo Bagnara | ba877ad | 2011-03-09 14:09:51 +0000 | [diff] [blame] | 1052 | CXXRecordDecl::Create(Context, Kind, SemanticContext, KWLoc, NameLoc, Name, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1053 | PrevClassTemplate? |
Douglas Gregor | aafc0cc | 2009-05-15 19:11:46 +0000 | [diff] [blame] | 1054 | PrevClassTemplate->getTemplatedDecl() : 0, |
| 1055 | /*DelayTypeCreation=*/true); |
John McCall | b621766 | 2010-03-15 10:12:16 +0000 | [diff] [blame] | 1056 | SetNestedNameSpecifier(NewClass, SS); |
Abramo Bagnara | c57c17d | 2011-03-10 13:28:31 +0000 | [diff] [blame] | 1057 | if (NumOuterTemplateParamLists > 0) |
| 1058 | NewClass->setTemplateParameterListsInfo(Context, |
| 1059 | NumOuterTemplateParamLists, |
| 1060 | OuterTemplateParamLists); |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 1061 | |
Eli Friedman | 572ae0a | 2012-02-10 02:02:21 +0000 | [diff] [blame] | 1062 | // Add alignment attributes if necessary; these attributes are checked when |
| 1063 | // the ASTContext lays out the structure. |
Eli Friedman | 2016c8c | 2012-08-08 21:08:34 +0000 | [diff] [blame] | 1064 | if (TUK == TUK_Definition) { |
| 1065 | AddAlignmentAttributesForRecord(NewClass); |
| 1066 | AddMsStructLayoutForRecord(NewClass); |
| 1067 | } |
Eli Friedman | 572ae0a | 2012-02-10 02:02:21 +0000 | [diff] [blame] | 1068 | |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 1069 | ClassTemplateDecl *NewTemplate |
| 1070 | = ClassTemplateDecl::Create(Context, SemanticContext, NameLoc, |
| 1071 | DeclarationName(Name), TemplateParams, |
Douglas Gregor | 5953d8b | 2009-03-19 17:26:29 +0000 | [diff] [blame] | 1072 | NewClass, PrevClassTemplate); |
Douglas Gregor | befc20e | 2009-03-26 00:10:35 +0000 | [diff] [blame] | 1073 | NewClass->setDescribedClassTemplate(NewTemplate); |
Douglas Gregor | 6311d2b | 2011-09-09 18:32:39 +0000 | [diff] [blame] | 1074 | |
Douglas Gregor | 2ccd89c | 2011-12-20 18:11:52 +0000 | [diff] [blame] | 1075 | if (ModulePrivateLoc.isValid()) |
Douglas Gregor | 6311d2b | 2011-09-09 18:32:39 +0000 | [diff] [blame] | 1076 | NewTemplate->setModulePrivate(); |
Douglas Gregor | 8d267c5 | 2011-09-09 02:06:17 +0000 | [diff] [blame] | 1077 | |
Douglas Gregor | aafc0cc | 2009-05-15 19:11:46 +0000 | [diff] [blame] | 1078 | // Build the type for the class template declaration now. |
Douglas Gregor | 24bae92 | 2010-07-08 18:37:38 +0000 | [diff] [blame] | 1079 | QualType T = NewTemplate->getInjectedClassNameSpecialization(); |
John McCall | 3cb0ebd | 2010-03-10 03:28:59 +0000 | [diff] [blame] | 1080 | T = Context.getInjectedClassNameType(NewClass, T); |
Douglas Gregor | aafc0cc | 2009-05-15 19:11:46 +0000 | [diff] [blame] | 1081 | assert(T->isDependentType() && "Class template type is not dependent?"); |
| 1082 | (void)T; |
| 1083 | |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1084 | // If we are providing an explicit specialization of a member that is a |
Douglas Gregor | fd056bc | 2009-10-13 16:30:37 +0000 | [diff] [blame] | 1085 | // class template, make a note of that. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1086 | if (PrevClassTemplate && |
Douglas Gregor | fd056bc | 2009-10-13 16:30:37 +0000 | [diff] [blame] | 1087 | PrevClassTemplate->getInstantiatedFromMemberTemplate()) |
| 1088 | PrevClassTemplate->setMemberSpecialization(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1089 | |
Anders Carlsson | 4cbe82c | 2009-03-26 01:24:28 +0000 | [diff] [blame] | 1090 | // Set the access specifier. |
Douglas Gregor | 42acead | 2012-03-17 23:06:31 +0000 | [diff] [blame] | 1091 | if (!Invalid && TUK != TUK_Friend && NewTemplate->getDeclContext()->isRecord()) |
John McCall | 05b23ea | 2009-09-14 21:59:20 +0000 | [diff] [blame] | 1092 | SetMemberAccessSpecifier(NewTemplate, PrevClassTemplate, AS); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1093 | |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 1094 | // Set the lexical context of these templates |
| 1095 | NewClass->setLexicalDeclContext(CurContext); |
| 1096 | NewTemplate->setLexicalDeclContext(CurContext); |
| 1097 | |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 1098 | if (TUK == TUK_Definition) |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 1099 | NewClass->startDefinition(); |
| 1100 | |
| 1101 | if (Attr) |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 1102 | ProcessDeclAttributeList(S, NewClass, Attr); |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 1103 | |
Rafael Espindola | 4bda1d8 | 2012-08-22 14:52:14 +0000 | [diff] [blame] | 1104 | if (PrevClassTemplate) |
| 1105 | mergeDeclAttributes(NewClass, PrevClassTemplate->getTemplatedDecl()); |
| 1106 | |
Rafael Espindola | 6b60370 | 2012-07-13 18:04:45 +0000 | [diff] [blame] | 1107 | AddPushedVisibilityAttribute(NewClass); |
| 1108 | |
John McCall | 05b23ea | 2009-09-14 21:59:20 +0000 | [diff] [blame] | 1109 | if (TUK != TUK_Friend) |
| 1110 | PushOnScopeChains(NewTemplate, S); |
| 1111 | else { |
Douglas Gregor | d85bea2 | 2009-09-26 06:47:28 +0000 | [diff] [blame] | 1112 | if (PrevClassTemplate && PrevClassTemplate->getAccess() != AS_none) { |
John McCall | 05b23ea | 2009-09-14 21:59:20 +0000 | [diff] [blame] | 1113 | NewTemplate->setAccess(PrevClassTemplate->getAccess()); |
Douglas Gregor | d85bea2 | 2009-09-26 06:47:28 +0000 | [diff] [blame] | 1114 | NewClass->setAccess(PrevClassTemplate->getAccess()); |
| 1115 | } |
John McCall | 05b23ea | 2009-09-14 21:59:20 +0000 | [diff] [blame] | 1116 | |
Richard Smith | 22050f2 | 2013-07-17 23:53:16 +0000 | [diff] [blame] | 1117 | NewTemplate->setObjectOfFriendDecl(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1118 | |
John McCall | 05b23ea | 2009-09-14 21:59:20 +0000 | [diff] [blame] | 1119 | // Friend templates are visible in fairly strange ways. |
| 1120 | if (!CurContext->isDependentContext()) { |
Sebastian Redl | 7a126a4 | 2010-08-31 00:36:30 +0000 | [diff] [blame] | 1121 | DeclContext *DC = SemanticContext->getRedeclContext(); |
Richard Smith | 1b7f9cb | 2012-03-13 03:12:56 +0000 | [diff] [blame] | 1122 | DC->makeDeclVisibleInContext(NewTemplate); |
John McCall | 05b23ea | 2009-09-14 21:59:20 +0000 | [diff] [blame] | 1123 | if (Scope *EnclosingScope = getScopeForDeclContext(S, DC)) |
| 1124 | PushOnScopeChains(NewTemplate, EnclosingScope, |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1125 | /* AddToContext = */ false); |
John McCall | 05b23ea | 2009-09-14 21:59:20 +0000 | [diff] [blame] | 1126 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1127 | |
Douglas Gregor | d85bea2 | 2009-09-26 06:47:28 +0000 | [diff] [blame] | 1128 | FriendDecl *Friend = FriendDecl::Create(Context, CurContext, |
| 1129 | NewClass->getLocation(), |
| 1130 | NewTemplate, |
| 1131 | /*FIXME:*/NewClass->getLocation()); |
| 1132 | Friend->setAccess(AS_public); |
| 1133 | CurContext->addDecl(Friend); |
John McCall | 05b23ea | 2009-09-14 21:59:20 +0000 | [diff] [blame] | 1134 | } |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 1135 | |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1136 | if (Invalid) { |
| 1137 | NewTemplate->setInvalidDecl(); |
| 1138 | NewClass->setInvalidDecl(); |
| 1139 | } |
Rafael Espindola | d3d02dd | 2012-07-13 01:19:08 +0000 | [diff] [blame] | 1140 | |
Dmitri Gribenko | 96b0986 | 2012-07-31 22:37:06 +0000 | [diff] [blame] | 1141 | ActOnDocumentableDecl(NewTemplate); |
| 1142 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 1143 | return NewTemplate; |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 1144 | } |
| 1145 | |
Douglas Gregor | 5b6d70e | 2009-11-25 17:50:39 +0000 | [diff] [blame] | 1146 | /// \brief Diagnose the presence of a default template argument on a |
| 1147 | /// template parameter, which is ill-formed in certain contexts. |
| 1148 | /// |
| 1149 | /// \returns true if the default template argument should be dropped. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1150 | static bool DiagnoseDefaultTemplateArgument(Sema &S, |
Douglas Gregor | 5b6d70e | 2009-11-25 17:50:39 +0000 | [diff] [blame] | 1151 | Sema::TemplateParamListContext TPC, |
| 1152 | SourceLocation ParamLoc, |
| 1153 | SourceRange DefArgRange) { |
| 1154 | switch (TPC) { |
| 1155 | case Sema::TPC_ClassTemplate: |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 1156 | case Sema::TPC_VarTemplate: |
Richard Smith | 3e4c6c4 | 2011-05-05 21:57:07 +0000 | [diff] [blame] | 1157 | case Sema::TPC_TypeAliasTemplate: |
Douglas Gregor | 5b6d70e | 2009-11-25 17:50:39 +0000 | [diff] [blame] | 1158 | return false; |
| 1159 | |
| 1160 | case Sema::TPC_FunctionTemplate: |
Douglas Gregor | d89d86f | 2011-02-04 04:20:44 +0000 | [diff] [blame] | 1161 | case Sema::TPC_FriendFunctionTemplateDefinition: |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1162 | // C++ [temp.param]p9: |
Douglas Gregor | 5b6d70e | 2009-11-25 17:50:39 +0000 | [diff] [blame] | 1163 | // A default template-argument shall not be specified in a |
| 1164 | // function template declaration or a function template |
| 1165 | // definition [...] |
Douglas Gregor | d89d86f | 2011-02-04 04:20:44 +0000 | [diff] [blame] | 1166 | // If a friend function template declaration specifies a default |
| 1167 | // template-argument, that declaration shall be a definition and shall be |
| 1168 | // the only declaration of the function template in the translation unit. |
| 1169 | // (C++98/03 doesn't have this wording; see DR226). |
Richard Smith | 80ad52f | 2013-01-02 11:42:31 +0000 | [diff] [blame] | 1170 | S.Diag(ParamLoc, S.getLangOpts().CPlusPlus11 ? |
Richard Smith | ebaf0e6 | 2011-10-18 20:49:44 +0000 | [diff] [blame] | 1171 | diag::warn_cxx98_compat_template_parameter_default_in_function_template |
| 1172 | : diag::ext_template_parameter_default_in_function_template) |
| 1173 | << DefArgRange; |
Douglas Gregor | 5b6d70e | 2009-11-25 17:50:39 +0000 | [diff] [blame] | 1174 | return false; |
| 1175 | |
| 1176 | case Sema::TPC_ClassTemplateMember: |
| 1177 | // C++0x [temp.param]p9: |
| 1178 | // A default template-argument shall not be specified in the |
| 1179 | // template-parameter-lists of the definition of a member of a |
| 1180 | // class template that appears outside of the member's class. |
| 1181 | S.Diag(ParamLoc, diag::err_template_parameter_default_template_member) |
| 1182 | << DefArgRange; |
| 1183 | return true; |
| 1184 | |
David Majnemer | 87b12b2 | 2013-06-25 22:08:55 +0000 | [diff] [blame] | 1185 | case Sema::TPC_FriendClassTemplate: |
Douglas Gregor | 5b6d70e | 2009-11-25 17:50:39 +0000 | [diff] [blame] | 1186 | case Sema::TPC_FriendFunctionTemplate: |
| 1187 | // C++ [temp.param]p9: |
| 1188 | // A default template-argument shall not be specified in a |
| 1189 | // friend template declaration. |
| 1190 | S.Diag(ParamLoc, diag::err_template_parameter_default_friend_template) |
| 1191 | << DefArgRange; |
| 1192 | return true; |
| 1193 | |
| 1194 | // FIXME: C++0x [temp.param]p9 allows default template-arguments |
| 1195 | // for friend function templates if there is only a single |
| 1196 | // declaration (and it is a definition). Strange! |
| 1197 | } |
| 1198 | |
David Blaikie | 7530c03 | 2012-01-17 06:56:22 +0000 | [diff] [blame] | 1199 | llvm_unreachable("Invalid TemplateParamListContext!"); |
Douglas Gregor | 5b6d70e | 2009-11-25 17:50:39 +0000 | [diff] [blame] | 1200 | } |
| 1201 | |
Douglas Gregor | 4d2abba | 2010-12-16 15:36:43 +0000 | [diff] [blame] | 1202 | /// \brief Check for unexpanded parameter packs within the template parameters |
| 1203 | /// of a template template parameter, recursively. |
Benjamin Kramer | da57f3e | 2011-03-26 12:38:21 +0000 | [diff] [blame] | 1204 | static bool DiagnoseUnexpandedParameterPacks(Sema &S, |
| 1205 | TemplateTemplateParmDecl *TTP) { |
Richard Smith | 6964b3f | 2012-09-07 02:06:42 +0000 | [diff] [blame] | 1206 | // A template template parameter which is a parameter pack is also a pack |
| 1207 | // expansion. |
| 1208 | if (TTP->isParameterPack()) |
| 1209 | return false; |
| 1210 | |
Douglas Gregor | 4d2abba | 2010-12-16 15:36:43 +0000 | [diff] [blame] | 1211 | TemplateParameterList *Params = TTP->getTemplateParameters(); |
| 1212 | for (unsigned I = 0, N = Params->size(); I != N; ++I) { |
| 1213 | NamedDecl *P = Params->getParam(I); |
| 1214 | if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(P)) { |
Richard Smith | 6964b3f | 2012-09-07 02:06:42 +0000 | [diff] [blame] | 1215 | if (!NTTP->isParameterPack() && |
| 1216 | S.DiagnoseUnexpandedParameterPack(NTTP->getLocation(), |
Douglas Gregor | 4d2abba | 2010-12-16 15:36:43 +0000 | [diff] [blame] | 1217 | NTTP->getTypeSourceInfo(), |
| 1218 | Sema::UPPC_NonTypeTemplateParameterType)) |
| 1219 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1220 | |
Douglas Gregor | 4d2abba | 2010-12-16 15:36:43 +0000 | [diff] [blame] | 1221 | continue; |
| 1222 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1223 | |
| 1224 | if (TemplateTemplateParmDecl *InnerTTP |
Douglas Gregor | 4d2abba | 2010-12-16 15:36:43 +0000 | [diff] [blame] | 1225 | = dyn_cast<TemplateTemplateParmDecl>(P)) |
| 1226 | if (DiagnoseUnexpandedParameterPacks(S, InnerTTP)) |
| 1227 | return true; |
| 1228 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1229 | |
Douglas Gregor | 4d2abba | 2010-12-16 15:36:43 +0000 | [diff] [blame] | 1230 | return false; |
| 1231 | } |
| 1232 | |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1233 | /// \brief Checks the validity of a template parameter list, possibly |
| 1234 | /// considering the template parameter list from a previous |
| 1235 | /// declaration. |
| 1236 | /// |
| 1237 | /// If an "old" template parameter list is provided, it must be |
| 1238 | /// equivalent (per TemplateParameterListsAreEqual) to the "new" |
| 1239 | /// template parameter list. |
| 1240 | /// |
| 1241 | /// \param NewParams Template parameter list for a new template |
| 1242 | /// declaration. This template parameter list will be updated with any |
| 1243 | /// default arguments that are carried through from the previous |
| 1244 | /// template parameter list. |
| 1245 | /// |
| 1246 | /// \param OldParams If provided, template parameter list from a |
| 1247 | /// previous declaration of the same template. Default template |
| 1248 | /// arguments will be merged from the old template parameter list to |
| 1249 | /// the new template parameter list. |
| 1250 | /// |
Douglas Gregor | 5b6d70e | 2009-11-25 17:50:39 +0000 | [diff] [blame] | 1251 | /// \param TPC Describes the context in which we are checking the given |
| 1252 | /// template parameter list. |
| 1253 | /// |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1254 | /// \returns true if an error occurred, false otherwise. |
| 1255 | bool Sema::CheckTemplateParameterList(TemplateParameterList *NewParams, |
Douglas Gregor | 5b6d70e | 2009-11-25 17:50:39 +0000 | [diff] [blame] | 1256 | TemplateParameterList *OldParams, |
| 1257 | TemplateParamListContext TPC) { |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1258 | bool Invalid = false; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1259 | |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1260 | // C++ [temp.param]p10: |
| 1261 | // The set of default template-arguments available for use with a |
| 1262 | // template declaration or definition is obtained by merging the |
| 1263 | // default arguments from the definition (if in scope) and all |
| 1264 | // declarations in scope in the same way default function |
| 1265 | // arguments are (8.3.6). |
| 1266 | bool SawDefaultArgument = false; |
| 1267 | SourceLocation PreviousDefaultArgLoc; |
Douglas Gregor | c15cb38 | 2009-02-09 23:23:08 +0000 | [diff] [blame] | 1268 | |
Mike Stump | 1a35fde | 2009-02-11 23:03:27 +0000 | [diff] [blame] | 1269 | // Dummy initialization to avoid warnings. |
Douglas Gregor | 1bc6913 | 2009-02-11 20:46:19 +0000 | [diff] [blame] | 1270 | TemplateParameterList::iterator OldParam = NewParams->end(); |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1271 | if (OldParams) |
| 1272 | OldParam = OldParams->begin(); |
| 1273 | |
Douglas Gregor | fd1a8fd | 2011-01-27 01:40:17 +0000 | [diff] [blame] | 1274 | bool RemoveDefaultArguments = false; |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1275 | for (TemplateParameterList::iterator NewParam = NewParams->begin(), |
| 1276 | NewParamEnd = NewParams->end(); |
| 1277 | NewParam != NewParamEnd; ++NewParam) { |
| 1278 | // Variables used to diagnose redundant default arguments |
| 1279 | bool RedundantDefaultArg = false; |
| 1280 | SourceLocation OldDefaultLoc; |
| 1281 | SourceLocation NewDefaultLoc; |
| 1282 | |
David Blaikie | 1368e58 | 2011-10-19 05:19:50 +0000 | [diff] [blame] | 1283 | // Variable used to diagnose missing default arguments |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1284 | bool MissingDefaultArg = false; |
| 1285 | |
David Blaikie | 1368e58 | 2011-10-19 05:19:50 +0000 | [diff] [blame] | 1286 | // Variable used to diagnose non-final parameter packs |
| 1287 | bool SawParameterPack = false; |
Anders Carlsson | 49d2557 | 2009-06-12 23:20:15 +0000 | [diff] [blame] | 1288 | |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1289 | if (TemplateTypeParmDecl *NewTypeParm |
| 1290 | = dyn_cast<TemplateTypeParmDecl>(*NewParam)) { |
Douglas Gregor | 5b6d70e | 2009-11-25 17:50:39 +0000 | [diff] [blame] | 1291 | // Check the presence of a default argument here. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1292 | if (NewTypeParm->hasDefaultArgument() && |
| 1293 | DiagnoseDefaultTemplateArgument(*this, TPC, |
| 1294 | NewTypeParm->getLocation(), |
Douglas Gregor | 5b6d70e | 2009-11-25 17:50:39 +0000 | [diff] [blame] | 1295 | NewTypeParm->getDefaultArgumentInfo()->getTypeLoc() |
Abramo Bagnara | bd054db | 2010-05-20 10:00:11 +0000 | [diff] [blame] | 1296 | .getSourceRange())) |
Douglas Gregor | 5b6d70e | 2009-11-25 17:50:39 +0000 | [diff] [blame] | 1297 | NewTypeParm->removeDefaultArgument(); |
| 1298 | |
| 1299 | // Merge default arguments for template type parameters. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1300 | TemplateTypeParmDecl *OldTypeParm |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1301 | = OldParams? cast<TemplateTypeParmDecl>(*OldParam) : 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1302 | |
Anders Carlsson | 49d2557 | 2009-06-12 23:20:15 +0000 | [diff] [blame] | 1303 | if (NewTypeParm->isParameterPack()) { |
| 1304 | assert(!NewTypeParm->hasDefaultArgument() && |
| 1305 | "Parameter packs can't have a default argument!"); |
| 1306 | SawParameterPack = true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1307 | } else if (OldTypeParm && OldTypeParm->hasDefaultArgument() && |
John McCall | 833ca99 | 2009-10-29 08:12:44 +0000 | [diff] [blame] | 1308 | NewTypeParm->hasDefaultArgument()) { |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1309 | OldDefaultLoc = OldTypeParm->getDefaultArgumentLoc(); |
| 1310 | NewDefaultLoc = NewTypeParm->getDefaultArgumentLoc(); |
| 1311 | SawDefaultArgument = true; |
| 1312 | RedundantDefaultArg = true; |
| 1313 | PreviousDefaultArgLoc = NewDefaultLoc; |
| 1314 | } else if (OldTypeParm && OldTypeParm->hasDefaultArgument()) { |
| 1315 | // Merge the default argument from the old declaration to the |
| 1316 | // new declaration. |
John McCall | 833ca99 | 2009-10-29 08:12:44 +0000 | [diff] [blame] | 1317 | NewTypeParm->setDefaultArgument(OldTypeParm->getDefaultArgumentInfo(), |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1318 | true); |
| 1319 | PreviousDefaultArgLoc = OldTypeParm->getDefaultArgumentLoc(); |
| 1320 | } else if (NewTypeParm->hasDefaultArgument()) { |
| 1321 | SawDefaultArgument = true; |
| 1322 | PreviousDefaultArgLoc = NewTypeParm->getDefaultArgumentLoc(); |
| 1323 | } else if (SawDefaultArgument) |
| 1324 | MissingDefaultArg = true; |
Mike Stump | ac5fc7c | 2009-08-04 21:02:39 +0000 | [diff] [blame] | 1325 | } else if (NonTypeTemplateParmDecl *NewNonTypeParm |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1326 | = dyn_cast<NonTypeTemplateParmDecl>(*NewParam)) { |
Douglas Gregor | 4d2abba | 2010-12-16 15:36:43 +0000 | [diff] [blame] | 1327 | // Check for unexpanded parameter packs. |
Richard Smith | 6964b3f | 2012-09-07 02:06:42 +0000 | [diff] [blame] | 1328 | if (!NewNonTypeParm->isParameterPack() && |
| 1329 | DiagnoseUnexpandedParameterPack(NewNonTypeParm->getLocation(), |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1330 | NewNonTypeParm->getTypeSourceInfo(), |
Douglas Gregor | 4d2abba | 2010-12-16 15:36:43 +0000 | [diff] [blame] | 1331 | UPPC_NonTypeTemplateParameterType)) { |
| 1332 | Invalid = true; |
| 1333 | continue; |
| 1334 | } |
| 1335 | |
Douglas Gregor | 5b6d70e | 2009-11-25 17:50:39 +0000 | [diff] [blame] | 1336 | // Check the presence of a default argument here. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1337 | if (NewNonTypeParm->hasDefaultArgument() && |
| 1338 | DiagnoseDefaultTemplateArgument(*this, TPC, |
| 1339 | NewNonTypeParm->getLocation(), |
Douglas Gregor | 5b6d70e | 2009-11-25 17:50:39 +0000 | [diff] [blame] | 1340 | NewNonTypeParm->getDefaultArgument()->getSourceRange())) { |
Abramo Bagnara | d92f7a2 | 2010-06-09 09:26:05 +0000 | [diff] [blame] | 1341 | NewNonTypeParm->removeDefaultArgument(); |
Douglas Gregor | 5b6d70e | 2009-11-25 17:50:39 +0000 | [diff] [blame] | 1342 | } |
| 1343 | |
Mike Stump | ac5fc7c | 2009-08-04 21:02:39 +0000 | [diff] [blame] | 1344 | // Merge default arguments for non-type template parameters |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1345 | NonTypeTemplateParmDecl *OldNonTypeParm |
| 1346 | = OldParams? cast<NonTypeTemplateParmDecl>(*OldParam) : 0; |
Douglas Gregor | 1ed6476 | 2011-01-05 16:19:19 +0000 | [diff] [blame] | 1347 | if (NewNonTypeParm->isParameterPack()) { |
| 1348 | assert(!NewNonTypeParm->hasDefaultArgument() && |
| 1349 | "Parameter packs can't have a default argument!"); |
Richard Smith | 6964b3f | 2012-09-07 02:06:42 +0000 | [diff] [blame] | 1350 | if (!NewNonTypeParm->isPackExpansion()) |
| 1351 | SawParameterPack = true; |
Douglas Gregor | 1ed6476 | 2011-01-05 16:19:19 +0000 | [diff] [blame] | 1352 | } else if (OldNonTypeParm && OldNonTypeParm->hasDefaultArgument() && |
Richard Smith | 03c55be | 2013-07-22 03:31:14 +0000 | [diff] [blame] | 1353 | NewNonTypeParm->hasDefaultArgument()) { |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1354 | OldDefaultLoc = OldNonTypeParm->getDefaultArgumentLoc(); |
| 1355 | NewDefaultLoc = NewNonTypeParm->getDefaultArgumentLoc(); |
| 1356 | SawDefaultArgument = true; |
| 1357 | RedundantDefaultArg = true; |
| 1358 | PreviousDefaultArgLoc = NewDefaultLoc; |
| 1359 | } else if (OldNonTypeParm && OldNonTypeParm->hasDefaultArgument()) { |
| 1360 | // Merge the default argument from the old declaration to the |
| 1361 | // new declaration. |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1362 | // FIXME: We need to create a new kind of "default argument" |
Douglas Gregor | 61c4d28 | 2011-01-05 15:48:55 +0000 | [diff] [blame] | 1363 | // expression that points to a previous non-type template |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1364 | // parameter. |
| 1365 | NewNonTypeParm->setDefaultArgument( |
Abramo Bagnara | d92f7a2 | 2010-06-09 09:26:05 +0000 | [diff] [blame] | 1366 | OldNonTypeParm->getDefaultArgument(), |
| 1367 | /*Inherited=*/ true); |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1368 | PreviousDefaultArgLoc = OldNonTypeParm->getDefaultArgumentLoc(); |
| 1369 | } else if (NewNonTypeParm->hasDefaultArgument()) { |
| 1370 | SawDefaultArgument = true; |
| 1371 | PreviousDefaultArgLoc = NewNonTypeParm->getDefaultArgumentLoc(); |
| 1372 | } else if (SawDefaultArgument) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1373 | MissingDefaultArg = true; |
Mike Stump | ac5fc7c | 2009-08-04 21:02:39 +0000 | [diff] [blame] | 1374 | } else { |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1375 | TemplateTemplateParmDecl *NewTemplateParm |
| 1376 | = cast<TemplateTemplateParmDecl>(*NewParam); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1377 | |
Douglas Gregor | 4d2abba | 2010-12-16 15:36:43 +0000 | [diff] [blame] | 1378 | // Check for unexpanded parameter packs, recursively. |
Douglas Gregor | 65019ac | 2011-10-25 03:44:56 +0000 | [diff] [blame] | 1379 | if (::DiagnoseUnexpandedParameterPacks(*this, NewTemplateParm)) { |
Douglas Gregor | 4d2abba | 2010-12-16 15:36:43 +0000 | [diff] [blame] | 1380 | Invalid = true; |
| 1381 | continue; |
| 1382 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1383 | |
David Blaikie | 1368e58 | 2011-10-19 05:19:50 +0000 | [diff] [blame] | 1384 | // Check the presence of a default argument here. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1385 | if (NewTemplateParm->hasDefaultArgument() && |
| 1386 | DiagnoseDefaultTemplateArgument(*this, TPC, |
| 1387 | NewTemplateParm->getLocation(), |
Douglas Gregor | 5b6d70e | 2009-11-25 17:50:39 +0000 | [diff] [blame] | 1388 | NewTemplateParm->getDefaultArgument().getSourceRange())) |
Abramo Bagnara | d92f7a2 | 2010-06-09 09:26:05 +0000 | [diff] [blame] | 1389 | NewTemplateParm->removeDefaultArgument(); |
Douglas Gregor | 5b6d70e | 2009-11-25 17:50:39 +0000 | [diff] [blame] | 1390 | |
| 1391 | // Merge default arguments for template template parameters |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1392 | TemplateTemplateParmDecl *OldTemplateParm |
| 1393 | = OldParams? cast<TemplateTemplateParmDecl>(*OldParam) : 0; |
Douglas Gregor | 1ed6476 | 2011-01-05 16:19:19 +0000 | [diff] [blame] | 1394 | if (NewTemplateParm->isParameterPack()) { |
| 1395 | assert(!NewTemplateParm->hasDefaultArgument() && |
| 1396 | "Parameter packs can't have a default argument!"); |
Richard Smith | 6964b3f | 2012-09-07 02:06:42 +0000 | [diff] [blame] | 1397 | if (!NewTemplateParm->isPackExpansion()) |
| 1398 | SawParameterPack = true; |
Douglas Gregor | 1ed6476 | 2011-01-05 16:19:19 +0000 | [diff] [blame] | 1399 | } else if (OldTemplateParm && OldTemplateParm->hasDefaultArgument() && |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1400 | NewTemplateParm->hasDefaultArgument()) { |
Douglas Gregor | 788cd06 | 2009-11-11 01:00:40 +0000 | [diff] [blame] | 1401 | OldDefaultLoc = OldTemplateParm->getDefaultArgument().getLocation(); |
| 1402 | NewDefaultLoc = NewTemplateParm->getDefaultArgument().getLocation(); |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1403 | SawDefaultArgument = true; |
| 1404 | RedundantDefaultArg = true; |
| 1405 | PreviousDefaultArgLoc = NewDefaultLoc; |
| 1406 | } else if (OldTemplateParm && OldTemplateParm->hasDefaultArgument()) { |
| 1407 | // Merge the default argument from the old declaration to the |
| 1408 | // new declaration. |
Mike Stump | 390b4cc | 2009-05-16 07:39:55 +0000 | [diff] [blame] | 1409 | // FIXME: We need to create a new kind of "default argument" expression |
| 1410 | // that points to a previous template template parameter. |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1411 | NewTemplateParm->setDefaultArgument( |
Abramo Bagnara | d92f7a2 | 2010-06-09 09:26:05 +0000 | [diff] [blame] | 1412 | OldTemplateParm->getDefaultArgument(), |
| 1413 | /*Inherited=*/ true); |
Douglas Gregor | 788cd06 | 2009-11-11 01:00:40 +0000 | [diff] [blame] | 1414 | PreviousDefaultArgLoc |
| 1415 | = OldTemplateParm->getDefaultArgument().getLocation(); |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1416 | } else if (NewTemplateParm->hasDefaultArgument()) { |
| 1417 | SawDefaultArgument = true; |
Douglas Gregor | 788cd06 | 2009-11-11 01:00:40 +0000 | [diff] [blame] | 1418 | PreviousDefaultArgLoc |
| 1419 | = NewTemplateParm->getDefaultArgument().getLocation(); |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1420 | } else if (SawDefaultArgument) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1421 | MissingDefaultArg = true; |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1422 | } |
| 1423 | |
Richard Smith | 6964b3f | 2012-09-07 02:06:42 +0000 | [diff] [blame] | 1424 | // C++11 [temp.param]p11: |
David Blaikie | 1368e58 | 2011-10-19 05:19:50 +0000 | [diff] [blame] | 1425 | // If a template parameter of a primary class template or alias template |
| 1426 | // is a template parameter pack, it shall be the last template parameter. |
Richard Smith | 6964b3f | 2012-09-07 02:06:42 +0000 | [diff] [blame] | 1427 | if (SawParameterPack && (NewParam + 1) != NewParamEnd && |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 1428 | (TPC == TPC_ClassTemplate || TPC == TPC_VarTemplate || |
| 1429 | TPC == TPC_TypeAliasTemplate)) { |
David Blaikie | 1368e58 | 2011-10-19 05:19:50 +0000 | [diff] [blame] | 1430 | Diag((*NewParam)->getLocation(), |
| 1431 | diag::err_template_param_pack_must_be_last_template_parameter); |
| 1432 | Invalid = true; |
| 1433 | } |
| 1434 | |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1435 | if (RedundantDefaultArg) { |
| 1436 | // C++ [temp.param]p12: |
| 1437 | // A template-parameter shall not be given default arguments |
| 1438 | // by two different declarations in the same scope. |
| 1439 | Diag(NewDefaultLoc, diag::err_template_param_default_arg_redefinition); |
| 1440 | Diag(OldDefaultLoc, diag::note_template_param_prev_default_arg); |
| 1441 | Invalid = true; |
Douglas Gregor | ee5d21f | 2011-02-04 03:57:22 +0000 | [diff] [blame] | 1442 | } else if (MissingDefaultArg && TPC != TPC_FunctionTemplate) { |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1443 | // C++ [temp.param]p11: |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1444 | // If a template-parameter of a class template has a default |
| 1445 | // template-argument, each subsequent template-parameter shall either |
Douglas Gregor | b49e415 | 2011-01-05 16:21:17 +0000 | [diff] [blame] | 1446 | // have a default template-argument supplied or be a template parameter |
| 1447 | // pack. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1448 | Diag((*NewParam)->getLocation(), |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1449 | diag::err_template_param_default_arg_missing); |
| 1450 | Diag(PreviousDefaultArgLoc, diag::note_template_param_prev_default_arg); |
| 1451 | Invalid = true; |
Douglas Gregor | fd1a8fd | 2011-01-27 01:40:17 +0000 | [diff] [blame] | 1452 | RemoveDefaultArguments = true; |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1453 | } |
| 1454 | |
| 1455 | // If we have an old template parameter list that we're merging |
| 1456 | // in, move on to the next parameter. |
| 1457 | if (OldParams) |
| 1458 | ++OldParam; |
| 1459 | } |
| 1460 | |
Douglas Gregor | fd1a8fd | 2011-01-27 01:40:17 +0000 | [diff] [blame] | 1461 | // We were missing some default arguments at the end of the list, so remove |
| 1462 | // all of the default arguments. |
| 1463 | if (RemoveDefaultArguments) { |
| 1464 | for (TemplateParameterList::iterator NewParam = NewParams->begin(), |
| 1465 | NewParamEnd = NewParams->end(); |
| 1466 | NewParam != NewParamEnd; ++NewParam) { |
| 1467 | if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*NewParam)) |
| 1468 | TTP->removeDefaultArgument(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1469 | else if (NonTypeTemplateParmDecl *NTTP |
Douglas Gregor | fd1a8fd | 2011-01-27 01:40:17 +0000 | [diff] [blame] | 1470 | = dyn_cast<NonTypeTemplateParmDecl>(*NewParam)) |
| 1471 | NTTP->removeDefaultArgument(); |
| 1472 | else |
| 1473 | cast<TemplateTemplateParmDecl>(*NewParam)->removeDefaultArgument(); |
| 1474 | } |
| 1475 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1476 | |
Douglas Gregor | d684b00 | 2009-02-10 19:49:53 +0000 | [diff] [blame] | 1477 | return Invalid; |
| 1478 | } |
Douglas Gregor | c15cb38 | 2009-02-09 23:23:08 +0000 | [diff] [blame] | 1479 | |
John McCall | 4e2cbb2 | 2010-10-20 05:44:58 +0000 | [diff] [blame] | 1480 | namespace { |
| 1481 | |
| 1482 | /// A class which looks for a use of a certain level of template |
| 1483 | /// parameter. |
| 1484 | struct DependencyChecker : RecursiveASTVisitor<DependencyChecker> { |
| 1485 | typedef RecursiveASTVisitor<DependencyChecker> super; |
| 1486 | |
| 1487 | unsigned Depth; |
| 1488 | bool Match; |
| 1489 | |
| 1490 | DependencyChecker(TemplateParameterList *Params) : Match(false) { |
| 1491 | NamedDecl *ND = Params->getParam(0); |
| 1492 | if (TemplateTypeParmDecl *PD = dyn_cast<TemplateTypeParmDecl>(ND)) { |
| 1493 | Depth = PD->getDepth(); |
| 1494 | } else if (NonTypeTemplateParmDecl *PD = |
| 1495 | dyn_cast<NonTypeTemplateParmDecl>(ND)) { |
| 1496 | Depth = PD->getDepth(); |
| 1497 | } else { |
| 1498 | Depth = cast<TemplateTemplateParmDecl>(ND)->getDepth(); |
| 1499 | } |
| 1500 | } |
| 1501 | |
| 1502 | bool Matches(unsigned ParmDepth) { |
| 1503 | if (ParmDepth >= Depth) { |
| 1504 | Match = true; |
| 1505 | return true; |
| 1506 | } |
| 1507 | return false; |
| 1508 | } |
| 1509 | |
| 1510 | bool VisitTemplateTypeParmType(const TemplateTypeParmType *T) { |
| 1511 | return !Matches(T->getDepth()); |
| 1512 | } |
| 1513 | |
| 1514 | bool TraverseTemplateName(TemplateName N) { |
| 1515 | if (TemplateTemplateParmDecl *PD = |
| 1516 | dyn_cast_or_null<TemplateTemplateParmDecl>(N.getAsTemplateDecl())) |
| 1517 | if (Matches(PD->getDepth())) return false; |
| 1518 | return super::TraverseTemplateName(N); |
| 1519 | } |
| 1520 | |
| 1521 | bool VisitDeclRefExpr(DeclRefExpr *E) { |
| 1522 | if (NonTypeTemplateParmDecl *PD = |
| 1523 | dyn_cast<NonTypeTemplateParmDecl>(E->getDecl())) { |
| 1524 | if (PD->getDepth() == Depth) { |
| 1525 | Match = true; |
| 1526 | return false; |
| 1527 | } |
| 1528 | } |
| 1529 | return super::VisitDeclRefExpr(E); |
| 1530 | } |
Douglas Gregor | 18c8339 | 2011-05-13 00:34:01 +0000 | [diff] [blame] | 1531 | |
| 1532 | bool TraverseInjectedClassNameType(const InjectedClassNameType *T) { |
| 1533 | return TraverseType(T->getInjectedSpecializationType()); |
| 1534 | } |
John McCall | 4e2cbb2 | 2010-10-20 05:44:58 +0000 | [diff] [blame] | 1535 | }; |
| 1536 | } |
| 1537 | |
Douglas Gregor | c840649 | 2011-05-10 18:27:06 +0000 | [diff] [blame] | 1538 | /// Determines whether a given type depends on the given parameter |
John McCall | 4e2cbb2 | 2010-10-20 05:44:58 +0000 | [diff] [blame] | 1539 | /// list. |
| 1540 | static bool |
Douglas Gregor | c840649 | 2011-05-10 18:27:06 +0000 | [diff] [blame] | 1541 | DependsOnTemplateParameters(QualType T, TemplateParameterList *Params) { |
John McCall | 4e2cbb2 | 2010-10-20 05:44:58 +0000 | [diff] [blame] | 1542 | DependencyChecker Checker(Params); |
Douglas Gregor | c840649 | 2011-05-10 18:27:06 +0000 | [diff] [blame] | 1543 | Checker.TraverseType(T); |
John McCall | 4e2cbb2 | 2010-10-20 05:44:58 +0000 | [diff] [blame] | 1544 | return Checker.Match; |
| 1545 | } |
| 1546 | |
Douglas Gregor | c840649 | 2011-05-10 18:27:06 +0000 | [diff] [blame] | 1547 | // Find the source range corresponding to the named type in the given |
| 1548 | // nested-name-specifier, if any. |
| 1549 | static SourceRange getRangeOfTypeInNestedNameSpecifier(ASTContext &Context, |
| 1550 | QualType T, |
| 1551 | const CXXScopeSpec &SS) { |
| 1552 | NestedNameSpecifierLoc NNSLoc(SS.getScopeRep(), SS.location_data()); |
| 1553 | while (NestedNameSpecifier *NNS = NNSLoc.getNestedNameSpecifier()) { |
| 1554 | if (const Type *CurType = NNS->getAsType()) { |
| 1555 | if (Context.hasSameUnqualifiedType(T, QualType(CurType, 0))) |
| 1556 | return NNSLoc.getTypeLoc().getSourceRange(); |
| 1557 | } else |
| 1558 | break; |
| 1559 | |
| 1560 | NNSLoc = NNSLoc.getPrefix(); |
| 1561 | } |
| 1562 | |
| 1563 | return SourceRange(); |
| 1564 | } |
| 1565 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1566 | /// \brief Match the given template parameter lists to the given scope |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 1567 | /// specifier, returning the template parameter list that applies to the |
| 1568 | /// name. |
| 1569 | /// |
| 1570 | /// \param DeclStartLoc the start of the declaration that has a scope |
| 1571 | /// specifier or a template parameter list. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1572 | /// |
Douglas Gregor | c840649 | 2011-05-10 18:27:06 +0000 | [diff] [blame] | 1573 | /// \param DeclLoc The location of the declaration itself. |
| 1574 | /// |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 1575 | /// \param SS the scope specifier that will be matched to the given template |
| 1576 | /// parameter lists. This scope specifier precedes a qualified name that is |
| 1577 | /// being declared. |
| 1578 | /// |
| 1579 | /// \param ParamLists the template parameter lists, from the outermost to the |
| 1580 | /// innermost template parameter lists. |
| 1581 | /// |
John McCall | 77e8b11 | 2010-04-13 20:37:33 +0000 | [diff] [blame] | 1582 | /// \param IsFriend Whether to apply the slightly different rules for |
| 1583 | /// matching template parameters to scope specifiers in friend |
| 1584 | /// declarations. |
| 1585 | /// |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 1586 | /// \param IsExplicitSpecialization will be set true if the entity being |
| 1587 | /// declared is an explicit specialization, false otherwise. |
| 1588 | /// |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1589 | /// \returns the template parameter list, if any, that corresponds to the |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 1590 | /// name that is preceded by the scope specifier @p SS. This template |
Abramo Bagnara | 7f0a915 | 2011-03-18 15:16:37 +0000 | [diff] [blame] | 1591 | /// parameter list may have template parameters (if we're declaring a |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1592 | /// template) or may have no template parameters (if we're declaring a |
Abramo Bagnara | 7f0a915 | 2011-03-18 15:16:37 +0000 | [diff] [blame] | 1593 | /// template specialization), or may be NULL (if what we're declaring isn't |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 1594 | /// itself a template). |
Robert Wilhelm | 1169e2f | 2013-07-21 15:20:44 +0000 | [diff] [blame] | 1595 | TemplateParameterList *Sema::MatchTemplateParametersToScopeSpecifier( |
| 1596 | SourceLocation DeclStartLoc, SourceLocation DeclLoc, const CXXScopeSpec &SS, |
| 1597 | ArrayRef<TemplateParameterList *> ParamLists, bool IsFriend, |
| 1598 | bool &IsExplicitSpecialization, bool &Invalid) { |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 1599 | IsExplicitSpecialization = false; |
Douglas Gregor | c840649 | 2011-05-10 18:27:06 +0000 | [diff] [blame] | 1600 | Invalid = false; |
| 1601 | |
| 1602 | // The sequence of nested types to which we will match up the template |
| 1603 | // parameter lists. We first build this list by starting with the type named |
| 1604 | // by the nested-name-specifier and walking out until we run out of types. |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1605 | SmallVector<QualType, 4> NestedTypes; |
Douglas Gregor | c840649 | 2011-05-10 18:27:06 +0000 | [diff] [blame] | 1606 | QualType T; |
Douglas Gregor | 714c992 | 2011-05-15 17:27:27 +0000 | [diff] [blame] | 1607 | if (SS.getScopeRep()) { |
| 1608 | if (CXXRecordDecl *Record |
| 1609 | = dyn_cast_or_null<CXXRecordDecl>(computeDeclContext(SS, true))) |
| 1610 | T = Context.getTypeDeclType(Record); |
| 1611 | else |
| 1612 | T = QualType(SS.getScopeRep()->getAsType(), 0); |
| 1613 | } |
Douglas Gregor | c840649 | 2011-05-10 18:27:06 +0000 | [diff] [blame] | 1614 | |
| 1615 | // If we found an explicit specialization that prevents us from needing |
| 1616 | // 'template<>' headers, this will be set to the location of that |
| 1617 | // explicit specialization. |
| 1618 | SourceLocation ExplicitSpecLoc; |
| 1619 | |
| 1620 | while (!T.isNull()) { |
| 1621 | NestedTypes.push_back(T); |
| 1622 | |
| 1623 | // Retrieve the parent of a record type. |
| 1624 | if (CXXRecordDecl *Record = T->getAsCXXRecordDecl()) { |
| 1625 | // If this type is an explicit specialization, we're done. |
| 1626 | if (ClassTemplateSpecializationDecl *Spec |
| 1627 | = dyn_cast<ClassTemplateSpecializationDecl>(Record)) { |
| 1628 | if (!isa<ClassTemplatePartialSpecializationDecl>(Spec) && |
| 1629 | Spec->getSpecializationKind() == TSK_ExplicitSpecialization) { |
| 1630 | ExplicitSpecLoc = Spec->getLocation(); |
| 1631 | break; |
Douglas Gregor | 3ebd753 | 2009-11-23 12:11:45 +0000 | [diff] [blame] | 1632 | } |
Douglas Gregor | c840649 | 2011-05-10 18:27:06 +0000 | [diff] [blame] | 1633 | } else if (Record->getTemplateSpecializationKind() |
| 1634 | == TSK_ExplicitSpecialization) { |
| 1635 | ExplicitSpecLoc = Record->getLocation(); |
John McCall | 77e8b11 | 2010-04-13 20:37:33 +0000 | [diff] [blame] | 1636 | break; |
| 1637 | } |
Douglas Gregor | c840649 | 2011-05-10 18:27:06 +0000 | [diff] [blame] | 1638 | |
| 1639 | if (TypeDecl *Parent = dyn_cast<TypeDecl>(Record->getParent())) |
| 1640 | T = Context.getTypeDeclType(Parent); |
| 1641 | else |
| 1642 | T = QualType(); |
| 1643 | continue; |
| 1644 | } |
| 1645 | |
| 1646 | if (const TemplateSpecializationType *TST |
| 1647 | = T->getAs<TemplateSpecializationType>()) { |
| 1648 | if (TemplateDecl *Template = TST->getTemplateName().getAsTemplateDecl()) { |
| 1649 | if (TypeDecl *Parent = dyn_cast<TypeDecl>(Template->getDeclContext())) |
| 1650 | T = Context.getTypeDeclType(Parent); |
| 1651 | else |
| 1652 | T = QualType(); |
| 1653 | continue; |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 1654 | } |
Douglas Gregor | c840649 | 2011-05-10 18:27:06 +0000 | [diff] [blame] | 1655 | } |
| 1656 | |
| 1657 | // Look one step prior in a dependent template specialization type. |
| 1658 | if (const DependentTemplateSpecializationType *DependentTST |
| 1659 | = T->getAs<DependentTemplateSpecializationType>()) { |
| 1660 | if (NestedNameSpecifier *NNS = DependentTST->getQualifier()) |
| 1661 | T = QualType(NNS->getAsType(), 0); |
| 1662 | else |
| 1663 | T = QualType(); |
| 1664 | continue; |
| 1665 | } |
| 1666 | |
| 1667 | // Look one step prior in a dependent name type. |
| 1668 | if (const DependentNameType *DependentName = T->getAs<DependentNameType>()){ |
| 1669 | if (NestedNameSpecifier *NNS = DependentName->getQualifier()) |
| 1670 | T = QualType(NNS->getAsType(), 0); |
| 1671 | else |
| 1672 | T = QualType(); |
| 1673 | continue; |
| 1674 | } |
| 1675 | |
| 1676 | // Retrieve the parent of an enumeration type. |
| 1677 | if (const EnumType *EnumT = T->getAs<EnumType>()) { |
| 1678 | // FIXME: Forward-declared enums require a TSK_ExplicitSpecialization |
| 1679 | // check here. |
| 1680 | EnumDecl *Enum = EnumT->getDecl(); |
| 1681 | |
| 1682 | // Get to the parent type. |
| 1683 | if (TypeDecl *Parent = dyn_cast<TypeDecl>(Enum->getParent())) |
| 1684 | T = Context.getTypeDeclType(Parent); |
| 1685 | else |
| 1686 | T = QualType(); |
| 1687 | continue; |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 1688 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1689 | |
Douglas Gregor | c840649 | 2011-05-10 18:27:06 +0000 | [diff] [blame] | 1690 | T = QualType(); |
| 1691 | } |
| 1692 | // Reverse the nested types list, since we want to traverse from the outermost |
| 1693 | // to the innermost while checking template-parameter-lists. |
| 1694 | std::reverse(NestedTypes.begin(), NestedTypes.end()); |
Douglas Gregor | b88e888 | 2009-07-30 17:40:51 +0000 | [diff] [blame] | 1695 | |
Douglas Gregor | c840649 | 2011-05-10 18:27:06 +0000 | [diff] [blame] | 1696 | // C++0x [temp.expl.spec]p17: |
| 1697 | // A member or a member template may be nested within many |
| 1698 | // enclosing class templates. In an explicit specialization for |
| 1699 | // such a member, the member declaration shall be preceded by a |
| 1700 | // template<> for each enclosing class template that is |
| 1701 | // explicitly specialized. |
Douglas Gregor | 89b9f10 | 2011-06-06 15:22:55 +0000 | [diff] [blame] | 1702 | bool SawNonEmptyTemplateParameterList = false; |
Douglas Gregor | c840649 | 2011-05-10 18:27:06 +0000 | [diff] [blame] | 1703 | unsigned ParamIdx = 0; |
| 1704 | for (unsigned TypeIdx = 0, NumTypes = NestedTypes.size(); TypeIdx != NumTypes; |
| 1705 | ++TypeIdx) { |
| 1706 | T = NestedTypes[TypeIdx]; |
| 1707 | |
| 1708 | // Whether we expect a 'template<>' header. |
| 1709 | bool NeedEmptyTemplateHeader = false; |
| 1710 | |
| 1711 | // Whether we expect a template header with parameters. |
| 1712 | bool NeedNonemptyTemplateHeader = false; |
| 1713 | |
| 1714 | // For a dependent type, the set of template parameters that we |
| 1715 | // expect to see. |
| 1716 | TemplateParameterList *ExpectedTemplateParams = 0; |
| 1717 | |
Douglas Gregor | 175c5bb | 2011-05-11 23:26:17 +0000 | [diff] [blame] | 1718 | // C++0x [temp.expl.spec]p15: |
| 1719 | // A member or a member template may be nested within many enclosing |
| 1720 | // class templates. In an explicit specialization for such a member, the |
| 1721 | // member declaration shall be preceded by a template<> for each |
| 1722 | // enclosing class template that is explicitly specialized. |
Douglas Gregor | c840649 | 2011-05-10 18:27:06 +0000 | [diff] [blame] | 1723 | if (CXXRecordDecl *Record = T->getAsCXXRecordDecl()) { |
| 1724 | if (ClassTemplatePartialSpecializationDecl *Partial |
| 1725 | = dyn_cast<ClassTemplatePartialSpecializationDecl>(Record)) { |
| 1726 | ExpectedTemplateParams = Partial->getTemplateParameters(); |
| 1727 | NeedNonemptyTemplateHeader = true; |
| 1728 | } else if (Record->isDependentType()) { |
| 1729 | if (Record->getDescribedClassTemplate()) { |
John McCall | 31f17ec | 2010-04-27 00:57:59 +0000 | [diff] [blame] | 1730 | ExpectedTemplateParams = Record->getDescribedClassTemplate() |
Douglas Gregor | c840649 | 2011-05-10 18:27:06 +0000 | [diff] [blame] | 1731 | ->getTemplateParameters(); |
| 1732 | NeedNonemptyTemplateHeader = true; |
| 1733 | } |
| 1734 | } else if (ClassTemplateSpecializationDecl *Spec |
| 1735 | = dyn_cast<ClassTemplateSpecializationDecl>(Record)) { |
| 1736 | // C++0x [temp.expl.spec]p4: |
| 1737 | // Members of an explicitly specialized class template are defined |
| 1738 | // in the same manner as members of normal classes, and not using |
| 1739 | // the template<> syntax. |
| 1740 | if (Spec->getSpecializationKind() != TSK_ExplicitSpecialization) |
| 1741 | NeedEmptyTemplateHeader = true; |
| 1742 | else |
Douglas Gregor | 95ea450 | 2011-06-01 22:37:07 +0000 | [diff] [blame] | 1743 | continue; |
Douglas Gregor | c840649 | 2011-05-10 18:27:06 +0000 | [diff] [blame] | 1744 | } else if (Record->getTemplateSpecializationKind()) { |
| 1745 | if (Record->getTemplateSpecializationKind() |
Douglas Gregor | 175c5bb | 2011-05-11 23:26:17 +0000 | [diff] [blame] | 1746 | != TSK_ExplicitSpecialization && |
| 1747 | TypeIdx == NumTypes - 1) |
| 1748 | IsExplicitSpecialization = true; |
| 1749 | |
| 1750 | continue; |
Douglas Gregor | c840649 | 2011-05-10 18:27:06 +0000 | [diff] [blame] | 1751 | } |
| 1752 | } else if (const TemplateSpecializationType *TST |
| 1753 | = T->getAs<TemplateSpecializationType>()) { |
| 1754 | if (TemplateDecl *Template = TST->getTemplateName().getAsTemplateDecl()) { |
| 1755 | ExpectedTemplateParams = Template->getTemplateParameters(); |
| 1756 | NeedNonemptyTemplateHeader = true; |
| 1757 | } |
| 1758 | } else if (T->getAs<DependentTemplateSpecializationType>()) { |
| 1759 | // FIXME: We actually could/should check the template arguments here |
| 1760 | // against the corresponding template parameter list. |
| 1761 | NeedNonemptyTemplateHeader = false; |
| 1762 | } |
| 1763 | |
Douglas Gregor | 89b9f10 | 2011-06-06 15:22:55 +0000 | [diff] [blame] | 1764 | // C++ [temp.expl.spec]p16: |
| 1765 | // In an explicit specialization declaration for a member of a class |
| 1766 | // template or a member template that ap- pears in namespace scope, the |
| 1767 | // member template and some of its enclosing class templates may remain |
| 1768 | // unspecialized, except that the declaration shall not explicitly |
| 1769 | // specialize a class member template if its en- closing class templates |
| 1770 | // are not explicitly specialized as well. |
Robert Wilhelm | 1169e2f | 2013-07-21 15:20:44 +0000 | [diff] [blame] | 1771 | if (ParamIdx < ParamLists.size()) { |
Douglas Gregor | 89b9f10 | 2011-06-06 15:22:55 +0000 | [diff] [blame] | 1772 | if (ParamLists[ParamIdx]->size() == 0) { |
| 1773 | if (SawNonEmptyTemplateParameterList) { |
| 1774 | Diag(DeclLoc, diag::err_specialize_member_of_template) |
| 1775 | << ParamLists[ParamIdx]->getSourceRange(); |
| 1776 | Invalid = true; |
| 1777 | IsExplicitSpecialization = false; |
| 1778 | return 0; |
| 1779 | } |
| 1780 | } else |
| 1781 | SawNonEmptyTemplateParameterList = true; |
| 1782 | } |
| 1783 | |
Douglas Gregor | c840649 | 2011-05-10 18:27:06 +0000 | [diff] [blame] | 1784 | if (NeedEmptyTemplateHeader) { |
| 1785 | // If we're on the last of the types, and we need a 'template<>' header |
| 1786 | // here, then it's an explicit specialization. |
| 1787 | if (TypeIdx == NumTypes - 1) |
| 1788 | IsExplicitSpecialization = true; |
Robert Wilhelm | 1169e2f | 2013-07-21 15:20:44 +0000 | [diff] [blame] | 1789 | |
| 1790 | if (ParamIdx < ParamLists.size()) { |
Douglas Gregor | c840649 | 2011-05-10 18:27:06 +0000 | [diff] [blame] | 1791 | if (ParamLists[ParamIdx]->size() > 0) { |
| 1792 | // The header has template parameters when it shouldn't. Complain. |
| 1793 | Diag(ParamLists[ParamIdx]->getTemplateLoc(), |
| 1794 | diag::err_template_param_list_matches_nontemplate) |
| 1795 | << T |
| 1796 | << SourceRange(ParamLists[ParamIdx]->getLAngleLoc(), |
| 1797 | ParamLists[ParamIdx]->getRAngleLoc()) |
| 1798 | << getRangeOfTypeInNestedNameSpecifier(Context, T, SS); |
| 1799 | Invalid = true; |
| 1800 | return 0; |
| 1801 | } |
| 1802 | |
| 1803 | // Consume this template header. |
| 1804 | ++ParamIdx; |
| 1805 | continue; |
| 1806 | } |
| 1807 | |
| 1808 | if (!IsFriend) { |
| 1809 | // We don't have a template header, but we should. |
| 1810 | SourceLocation ExpectedTemplateLoc; |
Robert Wilhelm | 1169e2f | 2013-07-21 15:20:44 +0000 | [diff] [blame] | 1811 | if (!ParamLists.empty()) |
Douglas Gregor | c840649 | 2011-05-10 18:27:06 +0000 | [diff] [blame] | 1812 | ExpectedTemplateLoc = ParamLists[0]->getTemplateLoc(); |
| 1813 | else |
| 1814 | ExpectedTemplateLoc = DeclStartLoc; |
| 1815 | |
| 1816 | Diag(DeclLoc, diag::err_template_spec_needs_header) |
| 1817 | << getRangeOfTypeInNestedNameSpecifier(Context, T, SS) |
| 1818 | << FixItHint::CreateInsertion(ExpectedTemplateLoc, "template<> "); |
| 1819 | } |
| 1820 | |
| 1821 | continue; |
| 1822 | } |
| 1823 | |
| 1824 | if (NeedNonemptyTemplateHeader) { |
| 1825 | // In friend declarations we can have template-ids which don't |
| 1826 | // depend on the corresponding template parameter lists. But |
| 1827 | // assume that empty parameter lists are supposed to match this |
| 1828 | // template-id. |
| 1829 | if (IsFriend && T->isDependentType()) { |
Robert Wilhelm | 1169e2f | 2013-07-21 15:20:44 +0000 | [diff] [blame] | 1830 | if (ParamIdx < ParamLists.size() && |
Douglas Gregor | c840649 | 2011-05-10 18:27:06 +0000 | [diff] [blame] | 1831 | DependsOnTemplateParameters(T, ParamLists[ParamIdx])) |
| 1832 | ExpectedTemplateParams = 0; |
| 1833 | else |
| 1834 | continue; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1835 | } |
Douglas Gregor | 5b6d70e | 2009-11-25 17:50:39 +0000 | [diff] [blame] | 1836 | |
Robert Wilhelm | 1169e2f | 2013-07-21 15:20:44 +0000 | [diff] [blame] | 1837 | if (ParamIdx < ParamLists.size()) { |
| 1838 | // Check the template parameter list, if we can. |
Douglas Gregor | c840649 | 2011-05-10 18:27:06 +0000 | [diff] [blame] | 1839 | if (ExpectedTemplateParams && |
| 1840 | !TemplateParameterListsAreEqual(ParamLists[ParamIdx], |
| 1841 | ExpectedTemplateParams, |
| 1842 | true, TPL_TemplateMatch)) |
| 1843 | Invalid = true; |
| 1844 | |
| 1845 | if (!Invalid && |
| 1846 | CheckTemplateParameterList(ParamLists[ParamIdx], 0, |
| 1847 | TPC_ClassTemplateMember)) |
| 1848 | Invalid = true; |
| 1849 | |
| 1850 | ++ParamIdx; |
| 1851 | continue; |
| 1852 | } |
| 1853 | |
| 1854 | Diag(DeclLoc, diag::err_template_spec_needs_template_parameters) |
| 1855 | << T |
| 1856 | << getRangeOfTypeInNestedNameSpecifier(Context, T, SS); |
| 1857 | Invalid = true; |
| 1858 | continue; |
| 1859 | } |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 1860 | } |
Douglas Gregor | c840649 | 2011-05-10 18:27:06 +0000 | [diff] [blame] | 1861 | |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 1862 | // If there were at least as many template-ids as there were template |
| 1863 | // parameter lists, then there are no template parameter lists remaining for |
| 1864 | // the declaration itself. |
Robert Wilhelm | 1169e2f | 2013-07-21 15:20:44 +0000 | [diff] [blame] | 1865 | if (ParamIdx >= ParamLists.size()) |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 1866 | return 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1867 | |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 1868 | // If there were too many template parameter lists, complain about that now. |
Robert Wilhelm | 1169e2f | 2013-07-21 15:20:44 +0000 | [diff] [blame] | 1869 | if (ParamIdx < ParamLists.size() - 1) { |
Douglas Gregor | c840649 | 2011-05-10 18:27:06 +0000 | [diff] [blame] | 1870 | bool HasAnyExplicitSpecHeader = false; |
| 1871 | bool AllExplicitSpecHeaders = true; |
Robert Wilhelm | 1169e2f | 2013-07-21 15:20:44 +0000 | [diff] [blame] | 1872 | for (unsigned I = ParamIdx, E = ParamLists.size() - 1; I != E; ++I) { |
Douglas Gregor | c840649 | 2011-05-10 18:27:06 +0000 | [diff] [blame] | 1873 | if (ParamLists[I]->size() == 0) |
| 1874 | HasAnyExplicitSpecHeader = true; |
| 1875 | else |
| 1876 | AllExplicitSpecHeaders = false; |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 1877 | } |
Robert Wilhelm | 1169e2f | 2013-07-21 15:20:44 +0000 | [diff] [blame] | 1878 | |
Douglas Gregor | c840649 | 2011-05-10 18:27:06 +0000 | [diff] [blame] | 1879 | Diag(ParamLists[ParamIdx]->getTemplateLoc(), |
Robert Wilhelm | 1169e2f | 2013-07-21 15:20:44 +0000 | [diff] [blame] | 1880 | AllExplicitSpecHeaders ? diag::warn_template_spec_extra_headers |
| 1881 | : diag::err_template_spec_extra_headers) |
| 1882 | << SourceRange(ParamLists[ParamIdx]->getTemplateLoc(), |
| 1883 | ParamLists[ParamLists.size() - 2]->getRAngleLoc()); |
Douglas Gregor | c840649 | 2011-05-10 18:27:06 +0000 | [diff] [blame] | 1884 | |
| 1885 | // If there was a specialization somewhere, such that 'template<>' is |
| 1886 | // not required, and there were any 'template<>' headers, note where the |
| 1887 | // specialization occurred. |
| 1888 | if (ExplicitSpecLoc.isValid() && HasAnyExplicitSpecHeader) |
| 1889 | Diag(ExplicitSpecLoc, |
| 1890 | diag::note_explicit_template_spec_does_not_need_header) |
| 1891 | << NestedTypes.back(); |
| 1892 | |
| 1893 | // We have a template parameter list with no corresponding scope, which |
| 1894 | // means that the resulting template declaration can't be instantiated |
| 1895 | // properly (we'll end up with dependent nodes when we shouldn't). |
| 1896 | if (!AllExplicitSpecHeaders) |
| 1897 | Invalid = true; |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 1898 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1899 | |
Douglas Gregor | 89b9f10 | 2011-06-06 15:22:55 +0000 | [diff] [blame] | 1900 | // C++ [temp.expl.spec]p16: |
| 1901 | // In an explicit specialization declaration for a member of a class |
| 1902 | // template or a member template that ap- pears in namespace scope, the |
| 1903 | // member template and some of its enclosing class templates may remain |
| 1904 | // unspecialized, except that the declaration shall not explicitly |
| 1905 | // specialize a class member template if its en- closing class templates |
| 1906 | // are not explicitly specialized as well. |
Robert Wilhelm | 1169e2f | 2013-07-21 15:20:44 +0000 | [diff] [blame] | 1907 | if (ParamLists.back()->size() == 0 && SawNonEmptyTemplateParameterList) { |
Douglas Gregor | 89b9f10 | 2011-06-06 15:22:55 +0000 | [diff] [blame] | 1908 | Diag(DeclLoc, diag::err_specialize_member_of_template) |
| 1909 | << ParamLists[ParamIdx]->getSourceRange(); |
| 1910 | Invalid = true; |
| 1911 | IsExplicitSpecialization = false; |
| 1912 | return 0; |
| 1913 | } |
| 1914 | |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 1915 | // Return the last template parameter list, which corresponds to the |
| 1916 | // entity being declared. |
Robert Wilhelm | 1169e2f | 2013-07-21 15:20:44 +0000 | [diff] [blame] | 1917 | return ParamLists.back(); |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 1918 | } |
| 1919 | |
Douglas Gregor | 6cd9d4a | 2011-03-04 21:37:14 +0000 | [diff] [blame] | 1920 | void Sema::NoteAllFoundTemplates(TemplateName Name) { |
| 1921 | if (TemplateDecl *Template = Name.getAsTemplateDecl()) { |
| 1922 | Diag(Template->getLocation(), diag::note_template_declared_here) |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 1923 | << (isa<FunctionTemplateDecl>(Template) |
| 1924 | ? 0 |
| 1925 | : isa<ClassTemplateDecl>(Template) |
| 1926 | ? 1 |
| 1927 | : isa<VarTemplateDecl>(Template) |
| 1928 | ? 2 |
| 1929 | : isa<TypeAliasTemplateDecl>(Template) ? 3 : 4) |
| 1930 | << Template->getDeclName(); |
Douglas Gregor | 6cd9d4a | 2011-03-04 21:37:14 +0000 | [diff] [blame] | 1931 | return; |
| 1932 | } |
| 1933 | |
| 1934 | if (OverloadedTemplateStorage *OST = Name.getAsOverloadedTemplate()) { |
| 1935 | for (OverloadedTemplateStorage::iterator I = OST->begin(), |
| 1936 | IEnd = OST->end(); |
| 1937 | I != IEnd; ++I) |
| 1938 | Diag((*I)->getLocation(), diag::note_template_declared_here) |
| 1939 | << 0 << (*I)->getDeclName(); |
| 1940 | |
| 1941 | return; |
| 1942 | } |
| 1943 | } |
| 1944 | |
Douglas Gregor | 7532dc6 | 2009-03-30 22:58:21 +0000 | [diff] [blame] | 1945 | QualType Sema::CheckTemplateIdType(TemplateName Name, |
| 1946 | SourceLocation TemplateLoc, |
Douglas Gregor | 6771423 | 2011-03-03 02:41:12 +0000 | [diff] [blame] | 1947 | TemplateArgumentListInfo &TemplateArgs) { |
John McCall | 1460604 | 2011-06-30 08:33:18 +0000 | [diff] [blame] | 1948 | DependentTemplateName *DTN |
| 1949 | = Name.getUnderlying().getAsDependentTemplateName(); |
Richard Smith | 3e4c6c4 | 2011-05-05 21:57:07 +0000 | [diff] [blame] | 1950 | if (DTN && DTN->isIdentifier()) |
| 1951 | // When building a template-id where the template-name is dependent, |
| 1952 | // assume the template is a type template. Either our assumption is |
| 1953 | // correct, or the code is ill-formed and will be diagnosed when the |
| 1954 | // dependent name is substituted. |
| 1955 | return Context.getDependentTemplateSpecializationType(ETK_None, |
| 1956 | DTN->getQualifier(), |
| 1957 | DTN->getIdentifier(), |
| 1958 | TemplateArgs); |
| 1959 | |
Douglas Gregor | 7532dc6 | 2009-03-30 22:58:21 +0000 | [diff] [blame] | 1960 | TemplateDecl *Template = Name.getAsTemplateDecl(); |
Douglas Gregor | 6cd9d4a | 2011-03-04 21:37:14 +0000 | [diff] [blame] | 1961 | if (!Template || isa<FunctionTemplateDecl>(Template)) { |
| 1962 | // We might have a substituted template template parameter pack. If so, |
| 1963 | // build a template specialization type for it. |
| 1964 | if (Name.getAsSubstTemplateTemplateParmPack()) |
| 1965 | return Context.getTemplateSpecializationType(Name, TemplateArgs); |
Richard Smith | 3e4c6c4 | 2011-05-05 21:57:07 +0000 | [diff] [blame] | 1966 | |
Douglas Gregor | 6cd9d4a | 2011-03-04 21:37:14 +0000 | [diff] [blame] | 1967 | Diag(TemplateLoc, diag::err_template_id_not_a_type) |
| 1968 | << Name; |
| 1969 | NoteAllFoundTemplates(Name); |
| 1970 | return QualType(); |
Douglas Gregor | c45c232 | 2009-03-31 00:43:58 +0000 | [diff] [blame] | 1971 | } |
Douglas Gregor | 7532dc6 | 2009-03-30 22:58:21 +0000 | [diff] [blame] | 1972 | |
Douglas Gregor | 40808ce | 2009-03-09 23:48:35 +0000 | [diff] [blame] | 1973 | // Check that the template argument list is well-formed for this |
| 1974 | // template. |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1975 | SmallVector<TemplateArgument, 4> Converted; |
Douglas Gregor | b70126a | 2012-02-03 17:16:23 +0000 | [diff] [blame] | 1976 | bool ExpansionIntoFixedList = false; |
John McCall | d5532b6 | 2009-11-23 01:53:49 +0000 | [diff] [blame] | 1977 | if (CheckTemplateArgumentList(Template, TemplateLoc, TemplateArgs, |
Douglas Gregor | b70126a | 2012-02-03 17:16:23 +0000 | [diff] [blame] | 1978 | false, Converted, &ExpansionIntoFixedList)) |
Douglas Gregor | 40808ce | 2009-03-09 23:48:35 +0000 | [diff] [blame] | 1979 | return QualType(); |
| 1980 | |
Douglas Gregor | 40808ce | 2009-03-09 23:48:35 +0000 | [diff] [blame] | 1981 | QualType CanonType; |
| 1982 | |
Douglas Gregor | 561f812 | 2011-07-01 01:22:09 +0000 | [diff] [blame] | 1983 | bool InstantiationDependent = false; |
Douglas Gregor | b70126a | 2012-02-03 17:16:23 +0000 | [diff] [blame] | 1984 | TypeAliasTemplateDecl *AliasTemplate = 0; |
| 1985 | if (!ExpansionIntoFixedList && |
| 1986 | (AliasTemplate = dyn_cast<TypeAliasTemplateDecl>(Template))) { |
Richard Smith | 3e4c6c4 | 2011-05-05 21:57:07 +0000 | [diff] [blame] | 1987 | // Find the canonical type for this type alias template specialization. |
| 1988 | TypeAliasDecl *Pattern = AliasTemplate->getTemplatedDecl(); |
| 1989 | if (Pattern->isInvalidDecl()) |
| 1990 | return QualType(); |
| 1991 | |
| 1992 | TemplateArgumentList TemplateArgs(TemplateArgumentList::OnStack, |
| 1993 | Converted.data(), Converted.size()); |
| 1994 | |
| 1995 | // Only substitute for the innermost template argument list. |
| 1996 | MultiLevelTemplateArgumentList TemplateArgLists; |
Richard Smith | 1804174 | 2011-05-14 15:04:18 +0000 | [diff] [blame] | 1997 | TemplateArgLists.addOuterTemplateArguments(&TemplateArgs); |
Richard Smith | aff37b4 | 2011-05-12 00:06:17 +0000 | [diff] [blame] | 1998 | unsigned Depth = AliasTemplate->getTemplateParameters()->getDepth(); |
| 1999 | for (unsigned I = 0; I < Depth; ++I) |
Richard Smith | 7a9f7c7 | 2013-05-17 03:04:50 +0000 | [diff] [blame] | 2000 | TemplateArgLists.addOuterTemplateArguments(None); |
Richard Smith | 3e4c6c4 | 2011-05-05 21:57:07 +0000 | [diff] [blame] | 2001 | |
Richard Smith | a8eaf00 | 2012-08-23 06:16:52 +0000 | [diff] [blame] | 2002 | LocalInstantiationScope Scope(*this); |
Richard Smith | 3e4c6c4 | 2011-05-05 21:57:07 +0000 | [diff] [blame] | 2003 | InstantiatingTemplate Inst(*this, TemplateLoc, Template); |
Richard Smith | ab91ef1 | 2012-07-08 02:38:24 +0000 | [diff] [blame] | 2004 | if (Inst) |
| 2005 | return QualType(); |
Richard Smith | a8eaf00 | 2012-08-23 06:16:52 +0000 | [diff] [blame] | 2006 | |
Richard Smith | 3e4c6c4 | 2011-05-05 21:57:07 +0000 | [diff] [blame] | 2007 | CanonType = SubstType(Pattern->getUnderlyingType(), |
| 2008 | TemplateArgLists, AliasTemplate->getLocation(), |
| 2009 | AliasTemplate->getDeclName()); |
| 2010 | if (CanonType.isNull()) |
| 2011 | return QualType(); |
| 2012 | } else if (Name.isDependent() || |
| 2013 | TemplateSpecializationType::anyDependentTemplateArguments( |
Douglas Gregor | 561f812 | 2011-07-01 01:22:09 +0000 | [diff] [blame] | 2014 | TemplateArgs, InstantiationDependent)) { |
Douglas Gregor | 40808ce | 2009-03-09 23:48:35 +0000 | [diff] [blame] | 2015 | // This class template specialization is a dependent |
| 2016 | // type. Therefore, its canonical type is another class template |
| 2017 | // specialization type that contains all of the converted |
| 2018 | // arguments in canonical form. This ensures that, e.g., A<T> and |
| 2019 | // A<T, T> have identical types when A is declared as: |
| 2020 | // |
| 2021 | // template<typename T, typename U = T> struct A; |
Douglas Gregor | 25a3ef7 | 2009-05-07 06:41:52 +0000 | [diff] [blame] | 2022 | TemplateName CanonName = Context.getCanonicalTemplateName(Name); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2023 | CanonType = Context.getTemplateSpecializationType(CanonName, |
Douglas Gregor | 910f800 | 2010-11-07 23:05:16 +0000 | [diff] [blame] | 2024 | Converted.data(), |
| 2025 | Converted.size()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2026 | |
Douglas Gregor | 1275ae0 | 2009-07-28 23:00:59 +0000 | [diff] [blame] | 2027 | // FIXME: CanonType is not actually the canonical type, and unfortunately |
John McCall | 833ca99 | 2009-10-29 08:12:44 +0000 | [diff] [blame] | 2028 | // it is a TemplateSpecializationType that we will never use again. |
Douglas Gregor | 1275ae0 | 2009-07-28 23:00:59 +0000 | [diff] [blame] | 2029 | // In the future, we need to teach getTemplateSpecializationType to only |
| 2030 | // build the canonical type and return that to us. |
| 2031 | CanonType = Context.getCanonicalType(CanonType); |
John McCall | 31f17ec | 2010-04-27 00:57:59 +0000 | [diff] [blame] | 2032 | |
| 2033 | // This might work out to be a current instantiation, in which |
| 2034 | // case the canonical type needs to be the InjectedClassNameType. |
| 2035 | // |
| 2036 | // TODO: in theory this could be a simple hashtable lookup; most |
| 2037 | // changes to CurContext don't change the set of current |
| 2038 | // instantiations. |
| 2039 | if (isa<ClassTemplateDecl>(Template)) { |
| 2040 | for (DeclContext *Ctx = CurContext; Ctx; Ctx = Ctx->getLookupParent()) { |
| 2041 | // If we get out to a namespace, we're done. |
| 2042 | if (Ctx->isFileContext()) break; |
| 2043 | |
| 2044 | // If this isn't a record, keep looking. |
| 2045 | CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(Ctx); |
| 2046 | if (!Record) continue; |
| 2047 | |
| 2048 | // Look for one of the two cases with InjectedClassNameTypes |
| 2049 | // and check whether it's the same template. |
| 2050 | if (!isa<ClassTemplatePartialSpecializationDecl>(Record) && |
| 2051 | !Record->getDescribedClassTemplate()) |
| 2052 | continue; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2053 | |
John McCall | 31f17ec | 2010-04-27 00:57:59 +0000 | [diff] [blame] | 2054 | // Fetch the injected class name type and check whether its |
| 2055 | // injected type is equal to the type we just built. |
| 2056 | QualType ICNT = Context.getTypeDeclType(Record); |
| 2057 | QualType Injected = cast<InjectedClassNameType>(ICNT) |
| 2058 | ->getInjectedSpecializationType(); |
| 2059 | |
| 2060 | if (CanonType != Injected->getCanonicalTypeInternal()) |
| 2061 | continue; |
| 2062 | |
| 2063 | // If so, the canonical type of this TST is the injected |
| 2064 | // class name type of the record we just found. |
| 2065 | assert(ICNT.isCanonical()); |
| 2066 | CanonType = ICNT; |
John McCall | 31f17ec | 2010-04-27 00:57:59 +0000 | [diff] [blame] | 2067 | break; |
| 2068 | } |
| 2069 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2070 | } else if (ClassTemplateDecl *ClassTemplate |
Douglas Gregor | 7532dc6 | 2009-03-30 22:58:21 +0000 | [diff] [blame] | 2071 | = dyn_cast<ClassTemplateDecl>(Template)) { |
Douglas Gregor | 40808ce | 2009-03-09 23:48:35 +0000 | [diff] [blame] | 2072 | // Find the class template specialization declaration that |
| 2073 | // corresponds to these arguments. |
Douglas Gregor | 40808ce | 2009-03-09 23:48:35 +0000 | [diff] [blame] | 2074 | void *InsertPos = 0; |
| 2075 | ClassTemplateSpecializationDecl *Decl |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2076 | = ClassTemplate->findSpecialization(Converted.data(), Converted.size(), |
Douglas Gregor | 910f800 | 2010-11-07 23:05:16 +0000 | [diff] [blame] | 2077 | InsertPos); |
Douglas Gregor | 40808ce | 2009-03-09 23:48:35 +0000 | [diff] [blame] | 2078 | if (!Decl) { |
| 2079 | // This is the first time we have referenced this class template |
| 2080 | // specialization. Create the canonical declaration and add it to |
| 2081 | // the set of specializations. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2082 | Decl = ClassTemplateSpecializationDecl::Create(Context, |
Douglas Gregor | 13c8577 | 2010-05-06 00:28:52 +0000 | [diff] [blame] | 2083 | ClassTemplate->getTemplatedDecl()->getTagKind(), |
| 2084 | ClassTemplate->getDeclContext(), |
Abramo Bagnara | 09d8212 | 2011-10-03 20:34:03 +0000 | [diff] [blame] | 2085 | ClassTemplate->getTemplatedDecl()->getLocStart(), |
Abramo Bagnara | ba877ad | 2011-03-09 14:09:51 +0000 | [diff] [blame] | 2086 | ClassTemplate->getLocation(), |
Douglas Gregor | 910f800 | 2010-11-07 23:05:16 +0000 | [diff] [blame] | 2087 | ClassTemplate, |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2088 | Converted.data(), |
Douglas Gregor | 910f800 | 2010-11-07 23:05:16 +0000 | [diff] [blame] | 2089 | Converted.size(), 0); |
Argyrios Kyrtzidis | cc0b1bc | 2010-07-20 13:59:28 +0000 | [diff] [blame] | 2090 | ClassTemplate->AddSpecialization(Decl, InsertPos); |
Abramo Bagnara | 4f216d38 | 2012-09-05 09:05:18 +0000 | [diff] [blame] | 2091 | if (ClassTemplate->isOutOfLine()) |
| 2092 | Decl->setLexicalDeclContext(ClassTemplate->getLexicalDeclContext()); |
Douglas Gregor | 40808ce | 2009-03-09 23:48:35 +0000 | [diff] [blame] | 2093 | } |
| 2094 | |
| 2095 | CanonType = Context.getTypeDeclType(Decl); |
John McCall | 3cb0ebd | 2010-03-10 03:28:59 +0000 | [diff] [blame] | 2096 | assert(isa<RecordType>(CanonType) && |
| 2097 | "type of non-dependent specialization is not a RecordType"); |
Douglas Gregor | 40808ce | 2009-03-09 23:48:35 +0000 | [diff] [blame] | 2098 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2099 | |
Douglas Gregor | 40808ce | 2009-03-09 23:48:35 +0000 | [diff] [blame] | 2100 | // Build the fully-sugared type for this class template |
| 2101 | // specialization, which refers back to the class template |
| 2102 | // specialization we created or found. |
John McCall | 71d74bc | 2010-06-13 09:25:03 +0000 | [diff] [blame] | 2103 | return Context.getTemplateSpecializationType(Name, TemplateArgs, CanonType); |
Douglas Gregor | 40808ce | 2009-03-09 23:48:35 +0000 | [diff] [blame] | 2104 | } |
| 2105 | |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 2106 | TypeResult |
Abramo Bagnara | 55d23c9 | 2012-02-06 14:41:24 +0000 | [diff] [blame] | 2107 | Sema::ActOnTemplateIdType(CXXScopeSpec &SS, SourceLocation TemplateKWLoc, |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 2108 | TemplateTy TemplateD, SourceLocation TemplateLoc, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2109 | SourceLocation LAngleLoc, |
Douglas Gregor | 7532dc6 | 2009-03-30 22:58:21 +0000 | [diff] [blame] | 2110 | ASTTemplateArgsPtr TemplateArgsIn, |
Abramo Bagnara | fad03b7 | 2012-01-27 08:46:19 +0000 | [diff] [blame] | 2111 | SourceLocation RAngleLoc, |
| 2112 | bool IsCtorOrDtorName) { |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 2113 | if (SS.isInvalid()) |
| 2114 | return true; |
| 2115 | |
Serge Pavlov | 1806239 | 2013-08-27 13:15:56 +0000 | [diff] [blame] | 2116 | TemplateName Template = TemplateD.get(); |
Douglas Gregor | 55f6b14 | 2009-02-09 18:46:07 +0000 | [diff] [blame] | 2117 | |
Douglas Gregor | 40808ce | 2009-03-09 23:48:35 +0000 | [diff] [blame] | 2118 | // Translate the parser's template argument list in our AST format. |
John McCall | d5532b6 | 2009-11-23 01:53:49 +0000 | [diff] [blame] | 2119 | TemplateArgumentListInfo TemplateArgs(LAngleLoc, RAngleLoc); |
Douglas Gregor | 314b97f | 2009-11-10 19:49:08 +0000 | [diff] [blame] | 2120 | translateTemplateArguments(TemplateArgsIn, TemplateArgs); |
Douglas Gregor | c15cb38 | 2009-02-09 23:23:08 +0000 | [diff] [blame] | 2121 | |
Douglas Gregor | a88f09f | 2011-02-28 17:23:35 +0000 | [diff] [blame] | 2122 | if (DependentTemplateName *DTN = Template.getAsDependentTemplateName()) { |
Abramo Bagnara | fad03b7 | 2012-01-27 08:46:19 +0000 | [diff] [blame] | 2123 | QualType T |
| 2124 | = Context.getDependentTemplateSpecializationType(ETK_None, |
| 2125 | DTN->getQualifier(), |
| 2126 | DTN->getIdentifier(), |
| 2127 | TemplateArgs); |
| 2128 | // Build type-source information. |
Douglas Gregor | a88f09f | 2011-02-28 17:23:35 +0000 | [diff] [blame] | 2129 | TypeLocBuilder TLB; |
| 2130 | DependentTemplateSpecializationTypeLoc SpecTL |
| 2131 | = TLB.push<DependentTemplateSpecializationTypeLoc>(T); |
Abramo Bagnara | 55d23c9 | 2012-02-06 14:41:24 +0000 | [diff] [blame] | 2132 | SpecTL.setElaboratedKeywordLoc(SourceLocation()); |
| 2133 | SpecTL.setQualifierLoc(SS.getWithLocInContext(Context)); |
Abramo Bagnara | 66581d4 | 2012-02-06 22:45:07 +0000 | [diff] [blame] | 2134 | SpecTL.setTemplateKeywordLoc(TemplateKWLoc); |
Abramo Bagnara | 55d23c9 | 2012-02-06 14:41:24 +0000 | [diff] [blame] | 2135 | SpecTL.setTemplateNameLoc(TemplateLoc); |
Douglas Gregor | a88f09f | 2011-02-28 17:23:35 +0000 | [diff] [blame] | 2136 | SpecTL.setLAngleLoc(LAngleLoc); |
| 2137 | SpecTL.setRAngleLoc(RAngleLoc); |
Douglas Gregor | a88f09f | 2011-02-28 17:23:35 +0000 | [diff] [blame] | 2138 | for (unsigned I = 0, N = SpecTL.getNumArgs(); I != N; ++I) |
| 2139 | SpecTL.setArgLocInfo(I, TemplateArgs[I].getLocInfo()); |
| 2140 | return CreateParsedType(T, TLB.getTypeSourceInfo(Context, T)); |
| 2141 | } |
| 2142 | |
John McCall | d5532b6 | 2009-11-23 01:53:49 +0000 | [diff] [blame] | 2143 | QualType Result = CheckTemplateIdType(Template, TemplateLoc, TemplateArgs); |
Douglas Gregor | 31a19b6 | 2009-04-01 21:51:26 +0000 | [diff] [blame] | 2144 | |
| 2145 | if (Result.isNull()) |
| 2146 | return true; |
| 2147 | |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 2148 | // Build type-source information. |
Abramo Bagnara | 55d23c9 | 2012-02-06 14:41:24 +0000 | [diff] [blame] | 2149 | TypeLocBuilder TLB; |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 2150 | TemplateSpecializationTypeLoc SpecTL |
| 2151 | = TLB.push<TemplateSpecializationTypeLoc>(Result); |
Abramo Bagnara | 55d23c9 | 2012-02-06 14:41:24 +0000 | [diff] [blame] | 2152 | SpecTL.setTemplateKeywordLoc(TemplateKWLoc); |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 2153 | SpecTL.setTemplateNameLoc(TemplateLoc); |
| 2154 | SpecTL.setLAngleLoc(LAngleLoc); |
| 2155 | SpecTL.setRAngleLoc(RAngleLoc); |
| 2156 | for (unsigned i = 0, e = SpecTL.getNumArgs(); i != e; ++i) |
| 2157 | SpecTL.setArgLocInfo(i, TemplateArgs[i].getLocInfo()); |
John McCall | 833ca99 | 2009-10-29 08:12:44 +0000 | [diff] [blame] | 2158 | |
Abramo Bagnara | fad03b7 | 2012-01-27 08:46:19 +0000 | [diff] [blame] | 2159 | // NOTE: avoid constructing an ElaboratedTypeLoc if this is a |
| 2160 | // constructor or destructor name (in such a case, the scope specifier |
| 2161 | // will be attached to the enclosing Decl or Expr node). |
| 2162 | if (SS.isNotEmpty() && !IsCtorOrDtorName) { |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 2163 | // Create an elaborated-type-specifier containing the nested-name-specifier. |
| 2164 | Result = Context.getElaboratedType(ETK_None, SS.getScopeRep(), Result); |
| 2165 | ElaboratedTypeLoc ElabTL = TLB.push<ElaboratedTypeLoc>(Result); |
Abramo Bagnara | 38a4291 | 2012-02-06 19:09:27 +0000 | [diff] [blame] | 2166 | ElabTL.setElaboratedKeywordLoc(SourceLocation()); |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 2167 | ElabTL.setQualifierLoc(SS.getWithLocInContext(Context)); |
| 2168 | } |
| 2169 | |
| 2170 | return CreateParsedType(Result, TLB.getTypeSourceInfo(Context, Result)); |
John McCall | 6b2becf | 2009-09-08 17:47:29 +0000 | [diff] [blame] | 2171 | } |
John McCall | f1bbbb4 | 2009-09-04 01:14:41 +0000 | [diff] [blame] | 2172 | |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 2173 | TypeResult Sema::ActOnTagTemplateIdType(TagUseKind TUK, |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 2174 | TypeSpecifierType TagSpec, |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 2175 | SourceLocation TagLoc, |
| 2176 | CXXScopeSpec &SS, |
Abramo Bagnara | 55d23c9 | 2012-02-06 14:41:24 +0000 | [diff] [blame] | 2177 | SourceLocation TemplateKWLoc, |
| 2178 | TemplateTy TemplateD, |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 2179 | SourceLocation TemplateLoc, |
| 2180 | SourceLocation LAngleLoc, |
| 2181 | ASTTemplateArgsPtr TemplateArgsIn, |
| 2182 | SourceLocation RAngleLoc) { |
Serge Pavlov | 1806239 | 2013-08-27 13:15:56 +0000 | [diff] [blame] | 2183 | TemplateName Template = TemplateD.get(); |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 2184 | |
| 2185 | // Translate the parser's template argument list in our AST format. |
| 2186 | TemplateArgumentListInfo TemplateArgs(LAngleLoc, RAngleLoc); |
| 2187 | translateTemplateArguments(TemplateArgsIn, TemplateArgs); |
| 2188 | |
| 2189 | // Determine the tag kind |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 2190 | TagTypeKind TagKind = TypeWithKeyword::getTagTypeKindForTypeSpec(TagSpec); |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 2191 | ElaboratedTypeKeyword Keyword |
| 2192 | = TypeWithKeyword::getKeywordForTagTypeKind(TagKind); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2193 | |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 2194 | if (DependentTemplateName *DTN = Template.getAsDependentTemplateName()) { |
| 2195 | QualType T = Context.getDependentTemplateSpecializationType(Keyword, |
| 2196 | DTN->getQualifier(), |
| 2197 | DTN->getIdentifier(), |
| 2198 | TemplateArgs); |
| 2199 | |
| 2200 | // Build type-source information. |
| 2201 | TypeLocBuilder TLB; |
| 2202 | DependentTemplateSpecializationTypeLoc SpecTL |
Abramo Bagnara | 55d23c9 | 2012-02-06 14:41:24 +0000 | [diff] [blame] | 2203 | = TLB.push<DependentTemplateSpecializationTypeLoc>(T); |
| 2204 | SpecTL.setElaboratedKeywordLoc(TagLoc); |
| 2205 | SpecTL.setQualifierLoc(SS.getWithLocInContext(Context)); |
Abramo Bagnara | 66581d4 | 2012-02-06 22:45:07 +0000 | [diff] [blame] | 2206 | SpecTL.setTemplateKeywordLoc(TemplateKWLoc); |
Abramo Bagnara | 55d23c9 | 2012-02-06 14:41:24 +0000 | [diff] [blame] | 2207 | SpecTL.setTemplateNameLoc(TemplateLoc); |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 2208 | SpecTL.setLAngleLoc(LAngleLoc); |
| 2209 | SpecTL.setRAngleLoc(RAngleLoc); |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 2210 | for (unsigned I = 0, N = SpecTL.getNumArgs(); I != N; ++I) |
| 2211 | SpecTL.setArgLocInfo(I, TemplateArgs[I].getLocInfo()); |
| 2212 | return CreateParsedType(T, TLB.getTypeSourceInfo(Context, T)); |
| 2213 | } |
Richard Smith | 3e4c6c4 | 2011-05-05 21:57:07 +0000 | [diff] [blame] | 2214 | |
| 2215 | if (TypeAliasTemplateDecl *TAT = |
| 2216 | dyn_cast_or_null<TypeAliasTemplateDecl>(Template.getAsTemplateDecl())) { |
| 2217 | // C++0x [dcl.type.elab]p2: |
| 2218 | // If the identifier resolves to a typedef-name or the simple-template-id |
| 2219 | // resolves to an alias template specialization, the |
| 2220 | // elaborated-type-specifier is ill-formed. |
| 2221 | Diag(TemplateLoc, diag::err_tag_reference_non_tag) << 4; |
| 2222 | Diag(TAT->getLocation(), diag::note_declared_at); |
| 2223 | } |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 2224 | |
| 2225 | QualType Result = CheckTemplateIdType(Template, TemplateLoc, TemplateArgs); |
| 2226 | if (Result.isNull()) |
Matt Beaumont-Gay | 3a51d41 | 2011-08-25 23:22:24 +0000 | [diff] [blame] | 2227 | return TypeResult(true); |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 2228 | |
| 2229 | // Check the tag kind |
| 2230 | if (const RecordType *RT = Result->getAs<RecordType>()) { |
John McCall | 6b2becf | 2009-09-08 17:47:29 +0000 | [diff] [blame] | 2231 | RecordDecl *D = RT->getDecl(); |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 2232 | |
John McCall | 6b2becf | 2009-09-08 17:47:29 +0000 | [diff] [blame] | 2233 | IdentifierInfo *Id = D->getIdentifier(); |
| 2234 | assert(Id && "templated class must have an identifier"); |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 2235 | |
Richard Trieu | bbf34c0 | 2011-06-10 03:11:26 +0000 | [diff] [blame] | 2236 | if (!isAcceptableTagRedeclaration(D, TagKind, TUK == TUK_Definition, |
| 2237 | TagLoc, *Id)) { |
John McCall | 6b2becf | 2009-09-08 17:47:29 +0000 | [diff] [blame] | 2238 | Diag(TagLoc, diag::err_use_with_wrong_tag) |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 2239 | << Result |
Douglas Gregor | 849b243 | 2010-03-31 17:46:05 +0000 | [diff] [blame] | 2240 | << FixItHint::CreateReplacement(SourceRange(TagLoc), D->getKindName()); |
John McCall | c4e7019 | 2009-09-11 04:59:25 +0000 | [diff] [blame] | 2241 | Diag(D->getLocation(), diag::note_previous_use); |
John McCall | f1bbbb4 | 2009-09-04 01:14:41 +0000 | [diff] [blame] | 2242 | } |
| 2243 | } |
Abramo Bagnara | 55d23c9 | 2012-02-06 14:41:24 +0000 | [diff] [blame] | 2244 | |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 2245 | // Provide source-location information for the template specialization. |
| 2246 | TypeLocBuilder TLB; |
| 2247 | TemplateSpecializationTypeLoc SpecTL |
| 2248 | = TLB.push<TemplateSpecializationTypeLoc>(Result); |
Abramo Bagnara | 55d23c9 | 2012-02-06 14:41:24 +0000 | [diff] [blame] | 2249 | SpecTL.setTemplateKeywordLoc(TemplateKWLoc); |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 2250 | SpecTL.setTemplateNameLoc(TemplateLoc); |
| 2251 | SpecTL.setLAngleLoc(LAngleLoc); |
| 2252 | SpecTL.setRAngleLoc(RAngleLoc); |
| 2253 | for (unsigned i = 0, e = SpecTL.getNumArgs(); i != e; ++i) |
| 2254 | SpecTL.setArgLocInfo(i, TemplateArgs[i].getLocInfo()); |
John McCall | f1bbbb4 | 2009-09-04 01:14:41 +0000 | [diff] [blame] | 2255 | |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 2256 | // Construct an elaborated type containing the nested-name-specifier (if any) |
Abramo Bagnara | 55d23c9 | 2012-02-06 14:41:24 +0000 | [diff] [blame] | 2257 | // and tag keyword. |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 2258 | Result = Context.getElaboratedType(Keyword, SS.getScopeRep(), Result); |
| 2259 | ElaboratedTypeLoc ElabTL = TLB.push<ElaboratedTypeLoc>(Result); |
Abramo Bagnara | 38a4291 | 2012-02-06 19:09:27 +0000 | [diff] [blame] | 2260 | ElabTL.setElaboratedKeywordLoc(TagLoc); |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 2261 | ElabTL.setQualifierLoc(SS.getWithLocInContext(Context)); |
| 2262 | return CreateParsedType(Result, TLB.getTypeSourceInfo(Context, Result)); |
Douglas Gregor | 55f6b14 | 2009-02-09 18:46:07 +0000 | [diff] [blame] | 2263 | } |
| 2264 | |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 2265 | static bool CheckTemplatePartialSpecializationArgs( |
| 2266 | Sema &S, TemplateParameterList *TemplateParams, |
| 2267 | SmallVectorImpl<TemplateArgument> &TemplateArgs); |
| 2268 | |
| 2269 | static bool CheckTemplateSpecializationScope(Sema &S, NamedDecl *Specialized, |
| 2270 | NamedDecl *PrevDecl, |
| 2271 | SourceLocation Loc, |
| 2272 | bool IsPartialSpecialization); |
| 2273 | |
| 2274 | static TemplateSpecializationKind getTemplateSpecializationKind(Decl *D); |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 2275 | |
| 2276 | DeclResult Sema::ActOnVarTemplateSpecialization( |
| 2277 | Scope *S, VarTemplateDecl *VarTemplate, Declarator &D, TypeSourceInfo *DI, |
| 2278 | SourceLocation TemplateKWLoc, TemplateParameterList *TemplateParams, |
| 2279 | VarDecl::StorageClass SC, bool IsPartialSpecialization) { |
| 2280 | assert(VarTemplate && "A variable template id without template?"); |
| 2281 | |
| 2282 | // D must be variable template id. |
| 2283 | assert(D.getName().getKind() == UnqualifiedId::IK_TemplateId && |
| 2284 | "Variable template specialization is declared with a template it."); |
| 2285 | |
| 2286 | TemplateIdAnnotation *TemplateId = D.getName().TemplateId; |
| 2287 | SourceLocation TemplateNameLoc = D.getIdentifierLoc(); |
| 2288 | SourceLocation LAngleLoc = TemplateId->LAngleLoc; |
| 2289 | SourceLocation RAngleLoc = TemplateId->RAngleLoc; |
| 2290 | ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(), |
| 2291 | TemplateId->NumArgs); |
| 2292 | TemplateArgumentListInfo TemplateArgs(LAngleLoc, RAngleLoc); |
| 2293 | translateTemplateArguments(TemplateArgsPtr, TemplateArgs); |
| 2294 | TemplateName Name(VarTemplate); |
| 2295 | |
| 2296 | // Check for unexpanded parameter packs in any of the template arguments. |
| 2297 | for (unsigned I = 0, N = TemplateArgs.size(); I != N; ++I) |
| 2298 | if (DiagnoseUnexpandedParameterPack(TemplateArgs[I], |
| 2299 | UPPC_PartialSpecialization)) |
| 2300 | return true; |
| 2301 | |
| 2302 | // Check that the template argument list is well-formed for this |
| 2303 | // template. |
| 2304 | SmallVector<TemplateArgument, 4> Converted; |
| 2305 | if (CheckTemplateArgumentList(VarTemplate, TemplateNameLoc, TemplateArgs, |
| 2306 | false, Converted)) |
| 2307 | return true; |
| 2308 | |
| 2309 | // Check that the type of this variable template specialization |
| 2310 | // matches the expected type. |
| 2311 | TypeSourceInfo *ExpectedDI; |
| 2312 | { |
| 2313 | // Do substitution on the type of the declaration |
| 2314 | TemplateArgumentList TemplateArgList(TemplateArgumentList::OnStack, |
| 2315 | Converted.data(), Converted.size()); |
| 2316 | InstantiatingTemplate Inst(*this, TemplateKWLoc, VarTemplate); |
| 2317 | if (Inst) |
| 2318 | return true; |
| 2319 | VarDecl *Templated = VarTemplate->getTemplatedDecl(); |
| 2320 | ExpectedDI = |
| 2321 | SubstType(Templated->getTypeSourceInfo(), |
| 2322 | MultiLevelTemplateArgumentList(TemplateArgList), |
| 2323 | Templated->getTypeSpecStartLoc(), Templated->getDeclName()); |
| 2324 | } |
| 2325 | if (!ExpectedDI) |
| 2326 | return true; |
| 2327 | |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 2328 | // Find the variable template (partial) specialization declaration that |
| 2329 | // corresponds to these arguments. |
| 2330 | if (IsPartialSpecialization) { |
| 2331 | if (CheckTemplatePartialSpecializationArgs( |
| 2332 | *this, VarTemplate->getTemplateParameters(), Converted)) |
| 2333 | return true; |
| 2334 | |
| 2335 | bool InstantiationDependent; |
| 2336 | if (!Name.isDependent() && |
| 2337 | !TemplateSpecializationType::anyDependentTemplateArguments( |
| 2338 | TemplateArgs.getArgumentArray(), TemplateArgs.size(), |
| 2339 | InstantiationDependent)) { |
| 2340 | Diag(TemplateNameLoc, diag::err_partial_spec_fully_specialized) |
| 2341 | << VarTemplate->getDeclName(); |
| 2342 | IsPartialSpecialization = false; |
| 2343 | } |
| 2344 | } |
| 2345 | |
| 2346 | void *InsertPos = 0; |
| 2347 | VarTemplateSpecializationDecl *PrevDecl = 0; |
| 2348 | |
| 2349 | if (IsPartialSpecialization) |
| 2350 | // FIXME: Template parameter list matters too |
| 2351 | PrevDecl = VarTemplate->findPartialSpecialization( |
| 2352 | Converted.data(), Converted.size(), InsertPos); |
| 2353 | else |
| 2354 | PrevDecl = VarTemplate->findSpecialization(Converted.data(), |
| 2355 | Converted.size(), InsertPos); |
| 2356 | |
| 2357 | VarTemplateSpecializationDecl *Specialization = 0; |
| 2358 | |
| 2359 | // Check whether we can declare a variable template specialization in |
| 2360 | // the current scope. |
| 2361 | if (CheckTemplateSpecializationScope(*this, VarTemplate, PrevDecl, |
| 2362 | TemplateNameLoc, |
| 2363 | IsPartialSpecialization)) |
| 2364 | return true; |
| 2365 | |
| 2366 | if (PrevDecl && PrevDecl->getSpecializationKind() == TSK_Undeclared) { |
| 2367 | // Since the only prior variable template specialization with these |
| 2368 | // arguments was referenced but not declared, reuse that |
| 2369 | // declaration node as our own, updating its source location and |
| 2370 | // the list of outer template parameters to reflect our new declaration. |
| 2371 | Specialization = PrevDecl; |
| 2372 | Specialization->setLocation(TemplateNameLoc); |
| 2373 | PrevDecl = 0; |
| 2374 | } else if (IsPartialSpecialization) { |
| 2375 | // Create a new class template partial specialization declaration node. |
| 2376 | VarTemplatePartialSpecializationDecl *PrevPartial = |
| 2377 | cast_or_null<VarTemplatePartialSpecializationDecl>(PrevDecl); |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 2378 | VarTemplatePartialSpecializationDecl *Partial = |
| 2379 | VarTemplatePartialSpecializationDecl::Create( |
| 2380 | Context, VarTemplate->getDeclContext(), TemplateKWLoc, |
| 2381 | TemplateNameLoc, TemplateParams, VarTemplate, DI->getType(), DI, SC, |
Richard Smith | 37fd27d | 2013-08-22 23:27:37 +0000 | [diff] [blame] | 2382 | Converted.data(), Converted.size(), TemplateArgs); |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 2383 | |
| 2384 | if (!PrevPartial) |
| 2385 | VarTemplate->AddPartialSpecialization(Partial, InsertPos); |
| 2386 | Specialization = Partial; |
| 2387 | |
| 2388 | // If we are providing an explicit specialization of a member variable |
| 2389 | // template specialization, make a note of that. |
| 2390 | if (PrevPartial && PrevPartial->getInstantiatedFromMember()) |
Larisse Voufo | 04592e7 | 2013-08-22 00:28:27 +0000 | [diff] [blame] | 2391 | PrevPartial->setMemberSpecialization(); |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 2392 | |
| 2393 | // Check that all of the template parameters of the variable template |
| 2394 | // partial specialization are deducible from the template |
| 2395 | // arguments. If not, this variable template partial specialization |
| 2396 | // will never be used. |
| 2397 | llvm::SmallBitVector DeducibleParams(TemplateParams->size()); |
| 2398 | MarkUsedTemplateParameters(Partial->getTemplateArgs(), true, |
| 2399 | TemplateParams->getDepth(), DeducibleParams); |
| 2400 | |
| 2401 | if (!DeducibleParams.all()) { |
| 2402 | unsigned NumNonDeducible = |
| 2403 | DeducibleParams.size() - DeducibleParams.count(); |
| 2404 | Diag(TemplateNameLoc, diag::warn_partial_specs_not_deducible) |
| 2405 | << (NumNonDeducible > 1) << SourceRange(TemplateNameLoc, RAngleLoc); |
| 2406 | for (unsigned I = 0, N = DeducibleParams.size(); I != N; ++I) { |
| 2407 | if (!DeducibleParams[I]) { |
| 2408 | NamedDecl *Param = cast<NamedDecl>(TemplateParams->getParam(I)); |
| 2409 | if (Param->getDeclName()) |
| 2410 | Diag(Param->getLocation(), diag::note_partial_spec_unused_parameter) |
| 2411 | << Param->getDeclName(); |
| 2412 | else |
| 2413 | Diag(Param->getLocation(), diag::note_partial_spec_unused_parameter) |
| 2414 | << "<anonymous>"; |
| 2415 | } |
| 2416 | } |
| 2417 | } |
| 2418 | } else { |
| 2419 | // Create a new class template specialization declaration node for |
| 2420 | // this explicit specialization or friend declaration. |
| 2421 | Specialization = VarTemplateSpecializationDecl::Create( |
| 2422 | Context, VarTemplate->getDeclContext(), TemplateKWLoc, TemplateNameLoc, |
| 2423 | VarTemplate, DI->getType(), DI, SC, Converted.data(), Converted.size()); |
| 2424 | Specialization->setTemplateArgsInfo(TemplateArgs); |
| 2425 | |
| 2426 | if (!PrevDecl) |
| 2427 | VarTemplate->AddSpecialization(Specialization, InsertPos); |
| 2428 | } |
| 2429 | |
| 2430 | // C++ [temp.expl.spec]p6: |
| 2431 | // If a template, a member template or the member of a class template is |
| 2432 | // explicitly specialized then that specialization shall be declared |
| 2433 | // before the first use of that specialization that would cause an implicit |
| 2434 | // instantiation to take place, in every translation unit in which such a |
| 2435 | // use occurs; no diagnostic is required. |
| 2436 | if (PrevDecl && PrevDecl->getPointOfInstantiation().isValid()) { |
| 2437 | bool Okay = false; |
| 2438 | for (Decl *Prev = PrevDecl; Prev; Prev = Prev->getPreviousDecl()) { |
| 2439 | // Is there any previous explicit specialization declaration? |
| 2440 | if (getTemplateSpecializationKind(Prev) == TSK_ExplicitSpecialization) { |
| 2441 | Okay = true; |
| 2442 | break; |
| 2443 | } |
| 2444 | } |
| 2445 | |
| 2446 | if (!Okay) { |
| 2447 | SourceRange Range(TemplateNameLoc, RAngleLoc); |
| 2448 | Diag(TemplateNameLoc, diag::err_specialization_after_instantiation) |
| 2449 | << Name << Range; |
| 2450 | |
| 2451 | Diag(PrevDecl->getPointOfInstantiation(), |
| 2452 | diag::note_instantiation_required_here) |
| 2453 | << (PrevDecl->getTemplateSpecializationKind() != |
| 2454 | TSK_ImplicitInstantiation); |
| 2455 | return true; |
| 2456 | } |
| 2457 | } |
| 2458 | |
| 2459 | Specialization->setTemplateKeywordLoc(TemplateKWLoc); |
| 2460 | Specialization->setLexicalDeclContext(CurContext); |
| 2461 | |
| 2462 | // Add the specialization into its lexical context, so that it can |
| 2463 | // be seen when iterating through the list of declarations in that |
| 2464 | // context. However, specializations are not found by name lookup. |
| 2465 | CurContext->addDecl(Specialization); |
| 2466 | |
| 2467 | // Note that this is an explicit specialization. |
| 2468 | Specialization->setSpecializationKind(TSK_ExplicitSpecialization); |
| 2469 | |
| 2470 | if (PrevDecl) { |
| 2471 | // Check that this isn't a redefinition of this specialization, |
| 2472 | // merging with previous declarations. |
| 2473 | LookupResult PrevSpec(*this, GetNameForDeclarator(D), LookupOrdinaryName, |
| 2474 | ForRedeclaration); |
| 2475 | PrevSpec.addDecl(PrevDecl); |
| 2476 | D.setRedeclaration(CheckVariableDeclaration(Specialization, PrevSpec)); |
Larisse Voufo | 04592e7 | 2013-08-22 00:28:27 +0000 | [diff] [blame] | 2477 | } else if (Specialization->isStaticDataMember() && |
| 2478 | Specialization->isOutOfLine()) { |
| 2479 | Specialization->setAccess(VarTemplate->getAccess()); |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 2480 | } |
| 2481 | |
| 2482 | // Link instantiations of static data members back to the template from |
| 2483 | // which they were instantiated. |
| 2484 | if (Specialization->isStaticDataMember()) |
| 2485 | Specialization->setInstantiationOfStaticDataMember( |
| 2486 | VarTemplate->getTemplatedDecl(), |
| 2487 | Specialization->getSpecializationKind()); |
| 2488 | |
| 2489 | return Specialization; |
| 2490 | } |
| 2491 | |
| 2492 | namespace { |
| 2493 | /// \brief A partial specialization whose template arguments have matched |
| 2494 | /// a given template-id. |
| 2495 | struct PartialSpecMatchResult { |
| 2496 | VarTemplatePartialSpecializationDecl *Partial; |
| 2497 | TemplateArgumentList *Args; |
| 2498 | }; |
| 2499 | } |
| 2500 | |
| 2501 | DeclResult |
| 2502 | Sema::CheckVarTemplateId(VarTemplateDecl *Template, SourceLocation TemplateLoc, |
| 2503 | SourceLocation TemplateNameLoc, |
| 2504 | const TemplateArgumentListInfo &TemplateArgs) { |
| 2505 | assert(Template && "A variable template id without template?"); |
| 2506 | |
| 2507 | // Check that the template argument list is well-formed for this template. |
| 2508 | SmallVector<TemplateArgument, 4> Converted; |
| 2509 | bool ExpansionIntoFixedList = false; |
| 2510 | if (CheckTemplateArgumentList( |
| 2511 | Template, TemplateNameLoc, |
| 2512 | const_cast<TemplateArgumentListInfo &>(TemplateArgs), false, |
| 2513 | Converted, &ExpansionIntoFixedList)) |
| 2514 | return true; |
| 2515 | |
| 2516 | // Find the variable template specialization declaration that |
| 2517 | // corresponds to these arguments. |
| 2518 | void *InsertPos = 0; |
| 2519 | if (VarTemplateSpecializationDecl *Spec = Template->findSpecialization( |
| 2520 | Converted.data(), Converted.size(), InsertPos)) |
| 2521 | // If we already have a variable template specialization, return it. |
| 2522 | return Spec; |
| 2523 | |
| 2524 | // This is the first time we have referenced this variable template |
| 2525 | // specialization. Create the canonical declaration and add it to |
| 2526 | // the set of specializations, based on the closest partial specialization |
| 2527 | // that it represents. That is, |
| 2528 | VarDecl *InstantiationPattern = Template->getTemplatedDecl(); |
| 2529 | TemplateArgumentList TemplateArgList(TemplateArgumentList::OnStack, |
| 2530 | Converted.data(), Converted.size()); |
| 2531 | TemplateArgumentList *InstantiationArgs = &TemplateArgList; |
| 2532 | bool AmbiguousPartialSpec = false; |
| 2533 | typedef PartialSpecMatchResult MatchResult; |
| 2534 | SmallVector<MatchResult, 4> Matched; |
| 2535 | SourceLocation PointOfInstantiation = TemplateNameLoc; |
| 2536 | TemplateSpecCandidateSet FailedCandidates(PointOfInstantiation); |
| 2537 | |
| 2538 | // 1. Attempt to find the closest partial specialization that this |
| 2539 | // specializes, if any. |
| 2540 | // If any of the template arguments is dependent, then this is probably |
| 2541 | // a placeholder for an incomplete declarative context; which must be |
| 2542 | // complete by instantiation time. Thus, do not search through the partial |
| 2543 | // specializations yet. |
Larisse Voufo | 8d2a5ea | 2013-08-23 22:21:36 +0000 | [diff] [blame] | 2544 | // TODO: Unify with InstantiateClassTemplateSpecialization()? |
| 2545 | // Perhaps better after unification of DeduceTemplateArguments() and |
| 2546 | // getMoreSpecializedPartialSpecialization(). |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 2547 | bool InstantiationDependent = false; |
| 2548 | if (!TemplateSpecializationType::anyDependentTemplateArguments( |
| 2549 | TemplateArgs, InstantiationDependent)) { |
| 2550 | |
| 2551 | SmallVector<VarTemplatePartialSpecializationDecl *, 4> PartialSpecs; |
| 2552 | Template->getPartialSpecializations(PartialSpecs); |
| 2553 | |
| 2554 | for (unsigned I = 0, N = PartialSpecs.size(); I != N; ++I) { |
| 2555 | VarTemplatePartialSpecializationDecl *Partial = PartialSpecs[I]; |
| 2556 | TemplateDeductionInfo Info(FailedCandidates.getLocation()); |
| 2557 | |
| 2558 | if (TemplateDeductionResult Result = |
| 2559 | DeduceTemplateArguments(Partial, TemplateArgList, Info)) { |
| 2560 | // Store the failed-deduction information for use in diagnostics, later. |
Larisse Voufo | 8d2a5ea | 2013-08-23 22:21:36 +0000 | [diff] [blame] | 2561 | // TODO: Actually use the failed-deduction info? |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 2562 | FailedCandidates.addCandidate() |
| 2563 | .set(Partial, MakeDeductionFailureInfo(Context, Result, Info)); |
| 2564 | (void)Result; |
| 2565 | } else { |
| 2566 | Matched.push_back(PartialSpecMatchResult()); |
| 2567 | Matched.back().Partial = Partial; |
| 2568 | Matched.back().Args = Info.take(); |
| 2569 | } |
| 2570 | } |
| 2571 | |
| 2572 | // If we're dealing with a member template where the template parameters |
| 2573 | // have been instantiated, this provides the original template parameters |
| 2574 | // from which the member template's parameters were instantiated. |
| 2575 | SmallVector<const NamedDecl *, 4> InstantiatedTemplateParameters; |
| 2576 | |
| 2577 | if (Matched.size() >= 1) { |
| 2578 | SmallVector<MatchResult, 4>::iterator Best = Matched.begin(); |
| 2579 | if (Matched.size() == 1) { |
| 2580 | // -- If exactly one matching specialization is found, the |
| 2581 | // instantiation is generated from that specialization. |
| 2582 | // We don't need to do anything for this. |
| 2583 | } else { |
| 2584 | // -- If more than one matching specialization is found, the |
| 2585 | // partial order rules (14.5.4.2) are used to determine |
| 2586 | // whether one of the specializations is more specialized |
| 2587 | // than the others. If none of the specializations is more |
| 2588 | // specialized than all of the other matching |
| 2589 | // specializations, then the use of the variable template is |
| 2590 | // ambiguous and the program is ill-formed. |
| 2591 | for (SmallVector<MatchResult, 4>::iterator P = Best + 1, |
| 2592 | PEnd = Matched.end(); |
| 2593 | P != PEnd; ++P) { |
| 2594 | if (getMoreSpecializedPartialSpecialization(P->Partial, Best->Partial, |
| 2595 | PointOfInstantiation) == |
| 2596 | P->Partial) |
| 2597 | Best = P; |
| 2598 | } |
| 2599 | |
| 2600 | // Determine if the best partial specialization is more specialized than |
| 2601 | // the others. |
| 2602 | for (SmallVector<MatchResult, 4>::iterator P = Matched.begin(), |
| 2603 | PEnd = Matched.end(); |
| 2604 | P != PEnd; ++P) { |
| 2605 | if (P != Best && getMoreSpecializedPartialSpecialization( |
| 2606 | P->Partial, Best->Partial, |
| 2607 | PointOfInstantiation) != Best->Partial) { |
| 2608 | AmbiguousPartialSpec = true; |
| 2609 | break; |
| 2610 | } |
| 2611 | } |
| 2612 | } |
| 2613 | |
| 2614 | // Instantiate using the best variable template partial specialization. |
| 2615 | InstantiationPattern = Best->Partial; |
| 2616 | InstantiationArgs = Best->Args; |
| 2617 | } else { |
| 2618 | // -- If no match is found, the instantiation is generated |
| 2619 | // from the primary template. |
| 2620 | // InstantiationPattern = Template->getTemplatedDecl(); |
| 2621 | } |
| 2622 | } |
| 2623 | |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 2624 | // 2. Create the canonical declaration. |
| 2625 | // Note that we do not instantiate the variable just yet, since |
| 2626 | // instantiation is handled in DoMarkVarDeclReferenced(). |
| 2627 | // FIXME: LateAttrs et al.? |
| 2628 | VarTemplateSpecializationDecl *Decl = BuildVarTemplateInstantiation( |
| 2629 | Template, InstantiationPattern, *InstantiationArgs, TemplateArgs, |
| 2630 | Converted, TemplateNameLoc, InsertPos /*, LateAttrs, StartingScope*/); |
| 2631 | if (!Decl) |
| 2632 | return true; |
| 2633 | |
| 2634 | if (AmbiguousPartialSpec) { |
| 2635 | // Partial ordering did not produce a clear winner. Complain. |
| 2636 | Decl->setInvalidDecl(); |
| 2637 | Diag(PointOfInstantiation, diag::err_partial_spec_ordering_ambiguous) |
| 2638 | << Decl; |
| 2639 | |
| 2640 | // Print the matching partial specializations. |
| 2641 | for (SmallVector<MatchResult, 4>::iterator P = Matched.begin(), |
| 2642 | PEnd = Matched.end(); |
| 2643 | P != PEnd; ++P) |
| 2644 | Diag(P->Partial->getLocation(), diag::note_partial_spec_match) |
| 2645 | << getTemplateArgumentBindingsText( |
| 2646 | P->Partial->getTemplateParameters(), *P->Args); |
| 2647 | return true; |
| 2648 | } |
| 2649 | |
| 2650 | if (VarTemplatePartialSpecializationDecl *D = |
| 2651 | dyn_cast<VarTemplatePartialSpecializationDecl>(InstantiationPattern)) |
| 2652 | Decl->setInstantiationOf(D, InstantiationArgs); |
| 2653 | |
| 2654 | assert(Decl && "No variable template specialization?"); |
| 2655 | return Decl; |
| 2656 | } |
| 2657 | |
| 2658 | ExprResult |
| 2659 | Sema::CheckVarTemplateId(const CXXScopeSpec &SS, |
| 2660 | const DeclarationNameInfo &NameInfo, |
| 2661 | VarTemplateDecl *Template, SourceLocation TemplateLoc, |
| 2662 | const TemplateArgumentListInfo *TemplateArgs) { |
| 2663 | |
| 2664 | DeclResult Decl = CheckVarTemplateId(Template, TemplateLoc, NameInfo.getLoc(), |
| 2665 | *TemplateArgs); |
| 2666 | if (Decl.isInvalid()) |
| 2667 | return ExprError(); |
| 2668 | |
| 2669 | VarDecl *Var = cast<VarDecl>(Decl.get()); |
| 2670 | if (!Var->getTemplateSpecializationKind()) |
| 2671 | Var->setTemplateSpecializationKind(TSK_ImplicitInstantiation, |
| 2672 | NameInfo.getLoc()); |
| 2673 | |
| 2674 | // Build an ordinary singleton decl ref. |
| 2675 | return BuildDeclarationNameExpr(SS, NameInfo, Var, |
| 2676 | /*FoundD=*/0, TemplateArgs); |
| 2677 | } |
| 2678 | |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 2679 | ExprResult Sema::BuildTemplateIdExpr(const CXXScopeSpec &SS, |
Abramo Bagnara | e4b9276 | 2012-01-27 09:46:47 +0000 | [diff] [blame] | 2680 | SourceLocation TemplateKWLoc, |
Douglas Gregor | 4c9be89 | 2011-02-28 20:01:57 +0000 | [diff] [blame] | 2681 | LookupResult &R, |
| 2682 | bool RequiresADL, |
Abramo Bagnara | 9d9922a | 2012-02-06 14:31:00 +0000 | [diff] [blame] | 2683 | const TemplateArgumentListInfo *TemplateArgs) { |
Douglas Gregor | edce4dd | 2009-06-30 22:34:41 +0000 | [diff] [blame] | 2684 | // FIXME: Can we do any checking at this point? I guess we could check the |
| 2685 | // template arguments that we have against the template name, if the template |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2686 | // name refers to a single template. That's not a terribly common case, |
Douglas Gregor | edce4dd | 2009-06-30 22:34:41 +0000 | [diff] [blame] | 2687 | // though. |
Douglas Gregor | 1be8eec | 2011-02-19 21:32:49 +0000 | [diff] [blame] | 2688 | // foo<int> could identify a single function unambiguously |
| 2689 | // This approach does NOT work, since f<int>(1); |
| 2690 | // gets resolved prior to resorting to overload resolution |
| 2691 | // i.e., template<class T> void f(double); |
| 2692 | // vs template<class T, class U> void f(U); |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 2693 | |
| 2694 | // These should be filtered out by our callers. |
| 2695 | assert(!R.empty() && "empty lookup results when building templateid"); |
| 2696 | assert(!R.isAmbiguous() && "ambiguous lookup when building templateid"); |
| 2697 | |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 2698 | // In C++1y, check variable template ids. |
| 2699 | if (R.getAsSingle<VarTemplateDecl>()) { |
| 2700 | return Owned(CheckVarTemplateId(SS, R.getLookupNameInfo(), |
| 2701 | R.getAsSingle<VarTemplateDecl>(), |
| 2702 | TemplateKWLoc, TemplateArgs)); |
| 2703 | } |
| 2704 | |
John McCall | c373d48 | 2010-01-27 01:50:18 +0000 | [diff] [blame] | 2705 | // We don't want lookup warnings at this point. |
| 2706 | R.suppressDiagnostics(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2707 | |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 2708 | UnresolvedLookupExpr *ULE |
Douglas Gregor | bebbe0d | 2010-12-15 01:34:56 +0000 | [diff] [blame] | 2709 | = UnresolvedLookupExpr::Create(Context, R.getNamingClass(), |
Douglas Gregor | 4c9be89 | 2011-02-28 20:01:57 +0000 | [diff] [blame] | 2710 | SS.getWithLocInContext(Context), |
Abramo Bagnara | e4b9276 | 2012-01-27 09:46:47 +0000 | [diff] [blame] | 2711 | TemplateKWLoc, |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 2712 | R.getLookupNameInfo(), |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2713 | RequiresADL, TemplateArgs, |
Douglas Gregor | 5a84dec | 2010-05-23 18:57:34 +0000 | [diff] [blame] | 2714 | R.begin(), R.end()); |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 2715 | |
| 2716 | return Owned(ULE); |
Douglas Gregor | edce4dd | 2009-06-30 22:34:41 +0000 | [diff] [blame] | 2717 | } |
| 2718 | |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 2719 | // We actually only call this from template instantiation. |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 2720 | ExprResult |
Jeffrey Yasskin | 9ab1454 | 2010-04-08 16:38:48 +0000 | [diff] [blame] | 2721 | Sema::BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, |
Abramo Bagnara | e4b9276 | 2012-01-27 09:46:47 +0000 | [diff] [blame] | 2722 | SourceLocation TemplateKWLoc, |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 2723 | const DeclarationNameInfo &NameInfo, |
Abramo Bagnara | 9d9922a | 2012-02-06 14:31:00 +0000 | [diff] [blame] | 2724 | const TemplateArgumentListInfo *TemplateArgs) { |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 2725 | |
Abramo Bagnara | 9d9922a | 2012-02-06 14:31:00 +0000 | [diff] [blame] | 2726 | assert(TemplateArgs || TemplateKWLoc.isValid()); |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 2727 | DeclContext *DC; |
| 2728 | if (!(DC = computeDeclContext(SS, false)) || |
| 2729 | DC->isDependentContext() || |
John McCall | 77bb1aa | 2010-05-01 00:40:08 +0000 | [diff] [blame] | 2730 | RequireCompleteDeclContext(SS, DC)) |
Abramo Bagnara | 9d9922a | 2012-02-06 14:31:00 +0000 | [diff] [blame] | 2731 | return BuildDependentDeclRefExpr(SS, TemplateKWLoc, NameInfo, TemplateArgs); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2732 | |
Douglas Gregor | 1fd6d44 | 2010-05-21 23:18:07 +0000 | [diff] [blame] | 2733 | bool MemberOfUnknownSpecialization; |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 2734 | LookupResult R(*this, NameInfo, LookupOrdinaryName); |
Douglas Gregor | 1fd6d44 | 2010-05-21 23:18:07 +0000 | [diff] [blame] | 2735 | LookupTemplateName(R, (Scope*) 0, SS, QualType(), /*Entering*/ false, |
| 2736 | MemberOfUnknownSpecialization); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2737 | |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 2738 | if (R.isAmbiguous()) |
| 2739 | return ExprError(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2740 | |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 2741 | if (R.empty()) { |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 2742 | Diag(NameInfo.getLoc(), diag::err_template_kw_refers_to_non_template) |
| 2743 | << NameInfo.getName() << SS.getRange(); |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 2744 | return ExprError(); |
| 2745 | } |
| 2746 | |
| 2747 | if (ClassTemplateDecl *Temp = R.getAsSingle<ClassTemplateDecl>()) { |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 2748 | Diag(NameInfo.getLoc(), diag::err_template_kw_refers_to_class_template) |
| 2749 | << (NestedNameSpecifier*) SS.getScopeRep() |
| 2750 | << NameInfo.getName() << SS.getRange(); |
John McCall | f7a1a74 | 2009-11-24 19:00:30 +0000 | [diff] [blame] | 2751 | Diag(Temp->getLocation(), diag::note_referenced_class_template); |
| 2752 | return ExprError(); |
| 2753 | } |
| 2754 | |
Abramo Bagnara | e4b9276 | 2012-01-27 09:46:47 +0000 | [diff] [blame] | 2755 | return BuildTemplateIdExpr(SS, TemplateKWLoc, R, /*ADL*/ false, TemplateArgs); |
Douglas Gregor | edce4dd | 2009-06-30 22:34:41 +0000 | [diff] [blame] | 2756 | } |
| 2757 | |
Douglas Gregor | c45c232 | 2009-03-31 00:43:58 +0000 | [diff] [blame] | 2758 | /// \brief Form a dependent template name. |
| 2759 | /// |
| 2760 | /// This action forms a dependent template name given the template |
| 2761 | /// name and its (presumably dependent) scope specifier. For |
| 2762 | /// example, given "MetaFun::template apply", the scope specifier \p |
| 2763 | /// SS will be "MetaFun::", \p TemplateKWLoc contains the location |
| 2764 | /// of the "template" keyword, and "apply" is the \p Name. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2765 | TemplateNameKind Sema::ActOnDependentTemplateName(Scope *S, |
Douglas Gregor | d6ab232 | 2010-06-16 23:00:59 +0000 | [diff] [blame] | 2766 | CXXScopeSpec &SS, |
Abramo Bagnara | e4b9276 | 2012-01-27 09:46:47 +0000 | [diff] [blame] | 2767 | SourceLocation TemplateKWLoc, |
Douglas Gregor | d6ab232 | 2010-06-16 23:00:59 +0000 | [diff] [blame] | 2768 | UnqualifiedId &Name, |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 2769 | ParsedType ObjectType, |
Douglas Gregor | d6ab232 | 2010-06-16 23:00:59 +0000 | [diff] [blame] | 2770 | bool EnteringContext, |
| 2771 | TemplateTy &Result) { |
Richard Smith | ebaf0e6 | 2011-10-18 20:49:44 +0000 | [diff] [blame] | 2772 | if (TemplateKWLoc.isValid() && S && !S->getTemplateParamParent()) |
| 2773 | Diag(TemplateKWLoc, |
Richard Smith | 80ad52f | 2013-01-02 11:42:31 +0000 | [diff] [blame] | 2774 | getLangOpts().CPlusPlus11 ? |
Richard Smith | ebaf0e6 | 2011-10-18 20:49:44 +0000 | [diff] [blame] | 2775 | diag::warn_cxx98_compat_template_outside_of_template : |
| 2776 | diag::ext_template_outside_of_template) |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2777 | << FixItHint::CreateRemoval(TemplateKWLoc); |
| 2778 | |
Douglas Gregor | 0707bc5 | 2010-01-19 16:01:07 +0000 | [diff] [blame] | 2779 | DeclContext *LookupCtx = 0; |
| 2780 | if (SS.isSet()) |
| 2781 | LookupCtx = computeDeclContext(SS, EnteringContext); |
| 2782 | if (!LookupCtx && ObjectType) |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 2783 | LookupCtx = computeDeclContext(ObjectType.get()); |
Douglas Gregor | 0707bc5 | 2010-01-19 16:01:07 +0000 | [diff] [blame] | 2784 | if (LookupCtx) { |
Douglas Gregor | c45c232 | 2009-03-31 00:43:58 +0000 | [diff] [blame] | 2785 | // C++0x [temp.names]p5: |
| 2786 | // If a name prefixed by the keyword template is not the name of |
| 2787 | // a template, the program is ill-formed. [Note: the keyword |
| 2788 | // template may not be applied to non-template members of class |
| 2789 | // templates. -end note ] [ Note: as is the case with the |
| 2790 | // typename prefix, the template prefix is allowed in cases |
| 2791 | // where it is not strictly necessary; i.e., when the |
| 2792 | // nested-name-specifier or the expression on the left of the -> |
| 2793 | // or . is not dependent on a template-parameter, or the use |
| 2794 | // does not appear in the scope of a template. -end note] |
| 2795 | // |
| 2796 | // Note: C++03 was more strict here, because it banned the use of |
| 2797 | // the "template" keyword prior to a template-name that was not a |
| 2798 | // dependent name. C++ DR468 relaxed this requirement (the |
| 2799 | // "template" keyword is now permitted). We follow the C++0x |
Douglas Gregor | 732281d | 2010-06-14 22:07:54 +0000 | [diff] [blame] | 2800 | // rules, even in C++03 mode with a warning, retroactively applying the DR. |
Douglas Gregor | 1fd6d44 | 2010-05-21 23:18:07 +0000 | [diff] [blame] | 2801 | bool MemberOfUnknownSpecialization; |
Richard Smith | d653701 | 2012-11-15 00:31:27 +0000 | [diff] [blame] | 2802 | TemplateNameKind TNK = isTemplateName(S, SS, TemplateKWLoc.isValid(), Name, |
Abramo Bagnara | 7c15353 | 2010-08-06 12:11:11 +0000 | [diff] [blame] | 2803 | ObjectType, EnteringContext, Result, |
Douglas Gregor | 1fd6d44 | 2010-05-21 23:18:07 +0000 | [diff] [blame] | 2804 | MemberOfUnknownSpecialization); |
Douglas Gregor | 0707bc5 | 2010-01-19 16:01:07 +0000 | [diff] [blame] | 2805 | if (TNK == TNK_Non_template && LookupCtx->isDependentContext() && |
| 2806 | isa<CXXRecordDecl>(LookupCtx) && |
Douglas Gregor | d078bd2 | 2011-03-11 23:27:41 +0000 | [diff] [blame] | 2807 | (!cast<CXXRecordDecl>(LookupCtx)->hasDefinition() || |
| 2808 | cast<CXXRecordDecl>(LookupCtx)->hasAnyDependentBases())) { |
Douglas Gregor | d6ab232 | 2010-06-16 23:00:59 +0000 | [diff] [blame] | 2809 | // This is a dependent template. Handle it below. |
Douglas Gregor | 9edad9b | 2010-01-14 17:47:39 +0000 | [diff] [blame] | 2810 | } else if (TNK == TNK_Non_template) { |
Daniel Dunbar | 96a0014 | 2012-03-09 18:35:03 +0000 | [diff] [blame] | 2811 | Diag(Name.getLocStart(), |
Douglas Gregor | 014e88d | 2009-11-03 23:16:33 +0000 | [diff] [blame] | 2812 | diag::err_template_kw_refers_to_non_template) |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 2813 | << GetNameFromUnqualifiedId(Name).getName() |
Douglas Gregor | 0278e12 | 2010-05-05 05:58:24 +0000 | [diff] [blame] | 2814 | << Name.getSourceRange() |
| 2815 | << TemplateKWLoc; |
Douglas Gregor | d6ab232 | 2010-06-16 23:00:59 +0000 | [diff] [blame] | 2816 | return TNK_Non_template; |
Douglas Gregor | 9edad9b | 2010-01-14 17:47:39 +0000 | [diff] [blame] | 2817 | } else { |
| 2818 | // We found something; return it. |
Douglas Gregor | d6ab232 | 2010-06-16 23:00:59 +0000 | [diff] [blame] | 2819 | return TNK; |
Douglas Gregor | c45c232 | 2009-03-31 00:43:58 +0000 | [diff] [blame] | 2820 | } |
Douglas Gregor | c45c232 | 2009-03-31 00:43:58 +0000 | [diff] [blame] | 2821 | } |
| 2822 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2823 | NestedNameSpecifier *Qualifier |
Douglas Gregor | 2dd078a | 2009-09-02 22:59:36 +0000 | [diff] [blame] | 2824 | = static_cast<NestedNameSpecifier *>(SS.getScopeRep()); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2825 | |
Douglas Gregor | 014e88d | 2009-11-03 23:16:33 +0000 | [diff] [blame] | 2826 | switch (Name.getKind()) { |
| 2827 | case UnqualifiedId::IK_Identifier: |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2828 | Result = TemplateTy::make(Context.getDependentTemplateName(Qualifier, |
Douglas Gregor | d6ab232 | 2010-06-16 23:00:59 +0000 | [diff] [blame] | 2829 | Name.Identifier)); |
| 2830 | return TNK_Dependent_template_name; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2831 | |
Douglas Gregor | ca1bdd7 | 2009-11-04 00:56:37 +0000 | [diff] [blame] | 2832 | case UnqualifiedId::IK_OperatorFunctionId: |
Douglas Gregor | d6ab232 | 2010-06-16 23:00:59 +0000 | [diff] [blame] | 2833 | Result = TemplateTy::make(Context.getDependentTemplateName(Qualifier, |
Douglas Gregor | ca1bdd7 | 2009-11-04 00:56:37 +0000 | [diff] [blame] | 2834 | Name.OperatorFunctionId.Operator)); |
Douglas Gregor | d6ab232 | 2010-06-16 23:00:59 +0000 | [diff] [blame] | 2835 | return TNK_Dependent_template_name; |
Sean Hunt | e6252d1 | 2009-11-28 08:58:14 +0000 | [diff] [blame] | 2836 | |
| 2837 | case UnqualifiedId::IK_LiteralOperatorId: |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 2838 | llvm_unreachable( |
| 2839 | "We don't support these; Parse shouldn't have allowed propagation"); |
Sean Hunt | e6252d1 | 2009-11-28 08:58:14 +0000 | [diff] [blame] | 2840 | |
Douglas Gregor | 014e88d | 2009-11-03 23:16:33 +0000 | [diff] [blame] | 2841 | default: |
| 2842 | break; |
| 2843 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2844 | |
Daniel Dunbar | 96a0014 | 2012-03-09 18:35:03 +0000 | [diff] [blame] | 2845 | Diag(Name.getLocStart(), |
Douglas Gregor | 014e88d | 2009-11-03 23:16:33 +0000 | [diff] [blame] | 2846 | diag::err_template_kw_refers_to_non_template) |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 2847 | << GetNameFromUnqualifiedId(Name).getName() |
Douglas Gregor | 0278e12 | 2010-05-05 05:58:24 +0000 | [diff] [blame] | 2848 | << Name.getSourceRange() |
| 2849 | << TemplateKWLoc; |
Douglas Gregor | d6ab232 | 2010-06-16 23:00:59 +0000 | [diff] [blame] | 2850 | return TNK_Non_template; |
Douglas Gregor | c45c232 | 2009-03-31 00:43:58 +0000 | [diff] [blame] | 2851 | } |
| 2852 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2853 | bool Sema::CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, |
John McCall | 833ca99 | 2009-10-29 08:12:44 +0000 | [diff] [blame] | 2854 | const TemplateArgumentLoc &AL, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 2855 | SmallVectorImpl<TemplateArgument> &Converted) { |
John McCall | 833ca99 | 2009-10-29 08:12:44 +0000 | [diff] [blame] | 2856 | const TemplateArgument &Arg = AL.getArgument(); |
| 2857 | |
Anders Carlsson | 436b156 | 2009-06-13 00:33:33 +0000 | [diff] [blame] | 2858 | // Check template type parameter. |
Jeffrey Yasskin | db88d8a | 2010-04-08 00:03:06 +0000 | [diff] [blame] | 2859 | switch(Arg.getKind()) { |
| 2860 | case TemplateArgument::Type: |
Anders Carlsson | 436b156 | 2009-06-13 00:33:33 +0000 | [diff] [blame] | 2861 | // C++ [temp.arg.type]p1: |
| 2862 | // A template-argument for a template-parameter which is a |
| 2863 | // type shall be a type-id. |
Jeffrey Yasskin | db88d8a | 2010-04-08 00:03:06 +0000 | [diff] [blame] | 2864 | break; |
| 2865 | case TemplateArgument::Template: { |
| 2866 | // We have a template type parameter but the template argument |
| 2867 | // is a template without any arguments. |
| 2868 | SourceRange SR = AL.getSourceRange(); |
| 2869 | TemplateName Name = Arg.getAsTemplate(); |
| 2870 | Diag(SR.getBegin(), diag::err_template_missing_args) |
| 2871 | << Name << SR; |
| 2872 | if (TemplateDecl *Decl = Name.getAsTemplateDecl()) |
| 2873 | Diag(Decl->getLocation(), diag::note_template_decl_here); |
Anders Carlsson | 436b156 | 2009-06-13 00:33:33 +0000 | [diff] [blame] | 2874 | |
Jeffrey Yasskin | db88d8a | 2010-04-08 00:03:06 +0000 | [diff] [blame] | 2875 | return true; |
| 2876 | } |
Kaelyn Uhrain | ab7ad72 | 2012-05-18 23:42:49 +0000 | [diff] [blame] | 2877 | case TemplateArgument::Expression: { |
| 2878 | // We have a template type parameter but the template argument is an |
| 2879 | // expression; see if maybe it is missing the "typename" keyword. |
| 2880 | CXXScopeSpec SS; |
| 2881 | DeclarationNameInfo NameInfo; |
| 2882 | |
| 2883 | if (DeclRefExpr *ArgExpr = dyn_cast<DeclRefExpr>(Arg.getAsExpr())) { |
| 2884 | SS.Adopt(ArgExpr->getQualifierLoc()); |
| 2885 | NameInfo = ArgExpr->getNameInfo(); |
| 2886 | } else if (DependentScopeDeclRefExpr *ArgExpr = |
| 2887 | dyn_cast<DependentScopeDeclRefExpr>(Arg.getAsExpr())) { |
| 2888 | SS.Adopt(ArgExpr->getQualifierLoc()); |
| 2889 | NameInfo = ArgExpr->getNameInfo(); |
| 2890 | } else if (CXXDependentScopeMemberExpr *ArgExpr = |
| 2891 | dyn_cast<CXXDependentScopeMemberExpr>(Arg.getAsExpr())) { |
Kaelyn Uhrain | 8c14de8 | 2012-06-08 01:07:26 +0000 | [diff] [blame] | 2892 | if (ArgExpr->isImplicitAccess()) { |
| 2893 | SS.Adopt(ArgExpr->getQualifierLoc()); |
| 2894 | NameInfo = ArgExpr->getMemberNameInfo(); |
| 2895 | } |
Kaelyn Uhrain | ab7ad72 | 2012-05-18 23:42:49 +0000 | [diff] [blame] | 2896 | } |
| 2897 | |
Kaelyn Uhrain | 8c14de8 | 2012-06-08 01:07:26 +0000 | [diff] [blame] | 2898 | if (NameInfo.getName().isIdentifier()) { |
Kaelyn Uhrain | ab7ad72 | 2012-05-18 23:42:49 +0000 | [diff] [blame] | 2899 | LookupResult Result(*this, NameInfo, LookupOrdinaryName); |
| 2900 | LookupParsedName(Result, CurScope, &SS); |
| 2901 | |
Kaelyn Uhrain | 8c14de8 | 2012-06-08 01:07:26 +0000 | [diff] [blame] | 2902 | if (Result.getAsSingle<TypeDecl>() || |
| 2903 | Result.getResultKind() == |
| 2904 | LookupResult::NotFoundInCurrentInstantiation) { |
| 2905 | // FIXME: Add a FixIt and fix up the template argument for recovery. |
Kaelyn Uhrain | ab7ad72 | 2012-05-18 23:42:49 +0000 | [diff] [blame] | 2906 | SourceLocation Loc = AL.getSourceRange().getBegin(); |
| 2907 | Diag(Loc, diag::err_template_arg_must_be_type_suggest); |
| 2908 | Diag(Param->getLocation(), diag::note_template_param_here); |
| 2909 | return true; |
| 2910 | } |
| 2911 | } |
| 2912 | // fallthrough |
| 2913 | } |
Jeffrey Yasskin | db88d8a | 2010-04-08 00:03:06 +0000 | [diff] [blame] | 2914 | default: { |
Anders Carlsson | 436b156 | 2009-06-13 00:33:33 +0000 | [diff] [blame] | 2915 | // We have a template type parameter but the template argument |
| 2916 | // is not a type. |
John McCall | 828bff2 | 2009-10-29 18:45:58 +0000 | [diff] [blame] | 2917 | SourceRange SR = AL.getSourceRange(); |
| 2918 | Diag(SR.getBegin(), diag::err_template_arg_must_be_type) << SR; |
Anders Carlsson | 436b156 | 2009-06-13 00:33:33 +0000 | [diff] [blame] | 2919 | Diag(Param->getLocation(), diag::note_template_param_here); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2920 | |
Anders Carlsson | 436b156 | 2009-06-13 00:33:33 +0000 | [diff] [blame] | 2921 | return true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2922 | } |
Jeffrey Yasskin | db88d8a | 2010-04-08 00:03:06 +0000 | [diff] [blame] | 2923 | } |
Anders Carlsson | 436b156 | 2009-06-13 00:33:33 +0000 | [diff] [blame] | 2924 | |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 2925 | if (CheckTemplateArgument(Param, AL.getTypeSourceInfo())) |
Anders Carlsson | 436b156 | 2009-06-13 00:33:33 +0000 | [diff] [blame] | 2926 | return true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2927 | |
Anders Carlsson | 436b156 | 2009-06-13 00:33:33 +0000 | [diff] [blame] | 2928 | // Add the converted template type argument. |
Douglas Gregor | e559ca1 | 2011-06-17 22:11:49 +0000 | [diff] [blame] | 2929 | QualType ArgType = Context.getCanonicalType(Arg.getAsType()); |
| 2930 | |
| 2931 | // Objective-C ARC: |
| 2932 | // If an explicitly-specified template argument type is a lifetime type |
| 2933 | // with no lifetime qualifier, the __strong lifetime qualifier is inferred. |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 2934 | if (getLangOpts().ObjCAutoRefCount && |
Douglas Gregor | e559ca1 | 2011-06-17 22:11:49 +0000 | [diff] [blame] | 2935 | ArgType->isObjCLifetimeType() && |
| 2936 | !ArgType.getObjCLifetime()) { |
| 2937 | Qualifiers Qs; |
| 2938 | Qs.setObjCLifetime(Qualifiers::OCL_Strong); |
| 2939 | ArgType = Context.getQualifiedType(ArgType, Qs); |
| 2940 | } |
| 2941 | |
| 2942 | Converted.push_back(TemplateArgument(ArgType)); |
Anders Carlsson | 436b156 | 2009-06-13 00:33:33 +0000 | [diff] [blame] | 2943 | return false; |
| 2944 | } |
| 2945 | |
Douglas Gregor | 0f8716b | 2009-11-09 19:17:50 +0000 | [diff] [blame] | 2946 | /// \brief Substitute template arguments into the default template argument for |
| 2947 | /// the given template type parameter. |
| 2948 | /// |
| 2949 | /// \param SemaRef the semantic analysis object for which we are performing |
| 2950 | /// the substitution. |
| 2951 | /// |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2952 | /// \param Template the template that we are synthesizing template arguments |
Douglas Gregor | 0f8716b | 2009-11-09 19:17:50 +0000 | [diff] [blame] | 2953 | /// for. |
| 2954 | /// |
| 2955 | /// \param TemplateLoc the location of the template name that started the |
| 2956 | /// template-id we are checking. |
| 2957 | /// |
| 2958 | /// \param RAngleLoc the location of the right angle bracket ('>') that |
| 2959 | /// terminates the template-id. |
| 2960 | /// |
| 2961 | /// \param Param the template template parameter whose default we are |
| 2962 | /// substituting into. |
| 2963 | /// |
| 2964 | /// \param Converted the list of template arguments provided for template |
| 2965 | /// parameters that precede \p Param in the template parameter list. |
Douglas Gregor | 0f8716b | 2009-11-09 19:17:50 +0000 | [diff] [blame] | 2966 | /// \returns the substituted template argument, or NULL if an error occurred. |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 2967 | static TypeSourceInfo * |
Douglas Gregor | 0f8716b | 2009-11-09 19:17:50 +0000 | [diff] [blame] | 2968 | SubstDefaultTemplateArgument(Sema &SemaRef, |
| 2969 | TemplateDecl *Template, |
| 2970 | SourceLocation TemplateLoc, |
| 2971 | SourceLocation RAngleLoc, |
| 2972 | TemplateTypeParmDecl *Param, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 2973 | SmallVectorImpl<TemplateArgument> &Converted) { |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 2974 | TypeSourceInfo *ArgType = Param->getDefaultArgumentInfo(); |
Douglas Gregor | 0f8716b | 2009-11-09 19:17:50 +0000 | [diff] [blame] | 2975 | |
| 2976 | // If the argument type is dependent, instantiate it now based |
| 2977 | // on the previously-computed template arguments. |
| 2978 | if (ArgType->getType()->isDependentType()) { |
Douglas Gregor | 0f8716b | 2009-11-09 19:17:50 +0000 | [diff] [blame] | 2979 | Sema::InstantiatingTemplate Inst(SemaRef, TemplateLoc, |
Richard Smith | 7e54fb5 | 2012-07-16 01:09:10 +0000 | [diff] [blame] | 2980 | Template, Converted, |
Douglas Gregor | 0f8716b | 2009-11-09 19:17:50 +0000 | [diff] [blame] | 2981 | SourceRange(TemplateLoc, RAngleLoc)); |
Richard Smith | ab91ef1 | 2012-07-08 02:38:24 +0000 | [diff] [blame] | 2982 | if (Inst) |
| 2983 | return 0; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2984 | |
David Majnemer | 9d57b8d | 2013-08-28 23:48:32 +0000 | [diff] [blame] | 2985 | TemplateArgumentList TemplateArgs(TemplateArgumentList::OnStack, |
| 2986 | Converted.data(), Converted.size()); |
| 2987 | |
| 2988 | // Only substitute for the innermost template argument list. |
| 2989 | MultiLevelTemplateArgumentList TemplateArgLists; |
| 2990 | TemplateArgLists.addOuterTemplateArguments(&TemplateArgs); |
| 2991 | for (unsigned i = 0, e = Param->getDepth(); i != e; ++i) |
| 2992 | TemplateArgLists.addOuterTemplateArguments(None); |
| 2993 | |
Argyrios Kyrtzidis | ad57991 | 2012-04-25 18:39:17 +0000 | [diff] [blame] | 2994 | Sema::ContextRAII SavedContext(SemaRef, Template->getDeclContext()); |
David Majnemer | 9d57b8d | 2013-08-28 23:48:32 +0000 | [diff] [blame] | 2995 | ArgType = |
| 2996 | SemaRef.SubstType(ArgType, TemplateArgLists, |
| 2997 | Param->getDefaultArgumentLoc(), Param->getDeclName()); |
Douglas Gregor | 0f8716b | 2009-11-09 19:17:50 +0000 | [diff] [blame] | 2998 | } |
| 2999 | |
| 3000 | return ArgType; |
| 3001 | } |
| 3002 | |
| 3003 | /// \brief Substitute template arguments into the default template argument for |
| 3004 | /// the given non-type template parameter. |
| 3005 | /// |
| 3006 | /// \param SemaRef the semantic analysis object for which we are performing |
| 3007 | /// the substitution. |
| 3008 | /// |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3009 | /// \param Template the template that we are synthesizing template arguments |
Douglas Gregor | 0f8716b | 2009-11-09 19:17:50 +0000 | [diff] [blame] | 3010 | /// for. |
| 3011 | /// |
| 3012 | /// \param TemplateLoc the location of the template name that started the |
| 3013 | /// template-id we are checking. |
| 3014 | /// |
| 3015 | /// \param RAngleLoc the location of the right angle bracket ('>') that |
| 3016 | /// terminates the template-id. |
| 3017 | /// |
Douglas Gregor | 788cd06 | 2009-11-11 01:00:40 +0000 | [diff] [blame] | 3018 | /// \param Param the non-type template parameter whose default we are |
Douglas Gregor | 0f8716b | 2009-11-09 19:17:50 +0000 | [diff] [blame] | 3019 | /// substituting into. |
| 3020 | /// |
| 3021 | /// \param Converted the list of template arguments provided for template |
| 3022 | /// parameters that precede \p Param in the template parameter list. |
| 3023 | /// |
| 3024 | /// \returns the substituted template argument, or NULL if an error occurred. |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 3025 | static ExprResult |
Douglas Gregor | 0f8716b | 2009-11-09 19:17:50 +0000 | [diff] [blame] | 3026 | SubstDefaultTemplateArgument(Sema &SemaRef, |
| 3027 | TemplateDecl *Template, |
| 3028 | SourceLocation TemplateLoc, |
| 3029 | SourceLocation RAngleLoc, |
| 3030 | NonTypeTemplateParmDecl *Param, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 3031 | SmallVectorImpl<TemplateArgument> &Converted) { |
Douglas Gregor | 0f8716b | 2009-11-09 19:17:50 +0000 | [diff] [blame] | 3032 | Sema::InstantiatingTemplate Inst(SemaRef, TemplateLoc, |
Richard Smith | 7e54fb5 | 2012-07-16 01:09:10 +0000 | [diff] [blame] | 3033 | Template, Converted, |
Douglas Gregor | 0f8716b | 2009-11-09 19:17:50 +0000 | [diff] [blame] | 3034 | SourceRange(TemplateLoc, RAngleLoc)); |
Richard Smith | ab91ef1 | 2012-07-08 02:38:24 +0000 | [diff] [blame] | 3035 | if (Inst) |
| 3036 | return ExprError(); |
Douglas Gregor | 0f8716b | 2009-11-09 19:17:50 +0000 | [diff] [blame] | 3037 | |
David Majnemer | 9d57b8d | 2013-08-28 23:48:32 +0000 | [diff] [blame] | 3038 | TemplateArgumentList TemplateArgs(TemplateArgumentList::OnStack, |
| 3039 | Converted.data(), Converted.size()); |
| 3040 | |
| 3041 | // Only substitute for the innermost template argument list. |
| 3042 | MultiLevelTemplateArgumentList TemplateArgLists; |
| 3043 | TemplateArgLists.addOuterTemplateArguments(&TemplateArgs); |
| 3044 | for (unsigned i = 0, e = Param->getDepth(); i != e; ++i) |
| 3045 | TemplateArgLists.addOuterTemplateArguments(None); |
| 3046 | |
Argyrios Kyrtzidis | ad57991 | 2012-04-25 18:39:17 +0000 | [diff] [blame] | 3047 | Sema::ContextRAII SavedContext(SemaRef, Template->getDeclContext()); |
Eli Friedman | 9b94cd1 | 2012-04-26 22:43:24 +0000 | [diff] [blame] | 3048 | EnterExpressionEvaluationContext Unevaluated(SemaRef, Sema::Unevaluated); |
David Majnemer | 9d57b8d | 2013-08-28 23:48:32 +0000 | [diff] [blame] | 3049 | return SemaRef.SubstExpr(Param->getDefaultArgument(), TemplateArgLists); |
Douglas Gregor | 0f8716b | 2009-11-09 19:17:50 +0000 | [diff] [blame] | 3050 | } |
| 3051 | |
Douglas Gregor | 788cd06 | 2009-11-11 01:00:40 +0000 | [diff] [blame] | 3052 | /// \brief Substitute template arguments into the default template argument for |
| 3053 | /// the given template template parameter. |
| 3054 | /// |
| 3055 | /// \param SemaRef the semantic analysis object for which we are performing |
| 3056 | /// the substitution. |
| 3057 | /// |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3058 | /// \param Template the template that we are synthesizing template arguments |
Douglas Gregor | 788cd06 | 2009-11-11 01:00:40 +0000 | [diff] [blame] | 3059 | /// for. |
| 3060 | /// |
| 3061 | /// \param TemplateLoc the location of the template name that started the |
| 3062 | /// template-id we are checking. |
| 3063 | /// |
| 3064 | /// \param RAngleLoc the location of the right angle bracket ('>') that |
| 3065 | /// terminates the template-id. |
| 3066 | /// |
| 3067 | /// \param Param the template template parameter whose default we are |
| 3068 | /// substituting into. |
| 3069 | /// |
| 3070 | /// \param Converted the list of template arguments provided for template |
| 3071 | /// parameters that precede \p Param in the template parameter list. |
| 3072 | /// |
Douglas Gregor | 1d752d7 | 2011-03-02 18:46:51 +0000 | [diff] [blame] | 3073 | /// \param QualifierLoc Will be set to the nested-name-specifier (with |
| 3074 | /// source-location information) that precedes the template name. |
Douglas Gregor | b6744ef | 2011-03-02 17:09:35 +0000 | [diff] [blame] | 3075 | /// |
Douglas Gregor | 788cd06 | 2009-11-11 01:00:40 +0000 | [diff] [blame] | 3076 | /// \returns the substituted template argument, or NULL if an error occurred. |
| 3077 | static TemplateName |
| 3078 | SubstDefaultTemplateArgument(Sema &SemaRef, |
| 3079 | TemplateDecl *Template, |
| 3080 | SourceLocation TemplateLoc, |
| 3081 | SourceLocation RAngleLoc, |
| 3082 | TemplateTemplateParmDecl *Param, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 3083 | SmallVectorImpl<TemplateArgument> &Converted, |
Douglas Gregor | b6744ef | 2011-03-02 17:09:35 +0000 | [diff] [blame] | 3084 | NestedNameSpecifierLoc &QualifierLoc) { |
David Majnemer | 9d57b8d | 2013-08-28 23:48:32 +0000 | [diff] [blame] | 3085 | Sema::InstantiatingTemplate Inst(SemaRef, TemplateLoc, Template, Converted, |
Douglas Gregor | 788cd06 | 2009-11-11 01:00:40 +0000 | [diff] [blame] | 3086 | SourceRange(TemplateLoc, RAngleLoc)); |
Richard Smith | ab91ef1 | 2012-07-08 02:38:24 +0000 | [diff] [blame] | 3087 | if (Inst) |
| 3088 | return TemplateName(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3089 | |
David Majnemer | 9d57b8d | 2013-08-28 23:48:32 +0000 | [diff] [blame] | 3090 | TemplateArgumentList TemplateArgs(TemplateArgumentList::OnStack, |
| 3091 | Converted.data(), Converted.size()); |
| 3092 | |
| 3093 | // Only substitute for the innermost template argument list. |
| 3094 | MultiLevelTemplateArgumentList TemplateArgLists; |
| 3095 | TemplateArgLists.addOuterTemplateArguments(&TemplateArgs); |
| 3096 | for (unsigned i = 0, e = Param->getDepth(); i != e; ++i) |
| 3097 | TemplateArgLists.addOuterTemplateArguments(None); |
| 3098 | |
Argyrios Kyrtzidis | ad57991 | 2012-04-25 18:39:17 +0000 | [diff] [blame] | 3099 | Sema::ContextRAII SavedContext(SemaRef, Template->getDeclContext()); |
David Majnemer | 9d57b8d | 2013-08-28 23:48:32 +0000 | [diff] [blame] | 3100 | // Substitute into the nested-name-specifier first, |
Douglas Gregor | 1d752d7 | 2011-03-02 18:46:51 +0000 | [diff] [blame] | 3101 | QualifierLoc = Param->getDefaultArgument().getTemplateQualifierLoc(); |
Douglas Gregor | b6744ef | 2011-03-02 17:09:35 +0000 | [diff] [blame] | 3102 | if (QualifierLoc) { |
David Majnemer | 9d57b8d | 2013-08-28 23:48:32 +0000 | [diff] [blame] | 3103 | QualifierLoc = |
| 3104 | SemaRef.SubstNestedNameSpecifierLoc(QualifierLoc, TemplateArgLists); |
Douglas Gregor | b6744ef | 2011-03-02 17:09:35 +0000 | [diff] [blame] | 3105 | if (!QualifierLoc) |
| 3106 | return TemplateName(); |
| 3107 | } |
David Majnemer | 9d57b8d | 2013-08-28 23:48:32 +0000 | [diff] [blame] | 3108 | |
| 3109 | return SemaRef.SubstTemplateName( |
| 3110 | QualifierLoc, |
| 3111 | Param->getDefaultArgument().getArgument().getAsTemplate(), |
| 3112 | Param->getDefaultArgument().getTemplateNameLoc(), |
| 3113 | TemplateArgLists); |
Douglas Gregor | 788cd06 | 2009-11-11 01:00:40 +0000 | [diff] [blame] | 3114 | } |
| 3115 | |
Douglas Gregor | 51ffb0c | 2009-11-25 18:55:14 +0000 | [diff] [blame] | 3116 | /// \brief If the given template parameter has a default template |
| 3117 | /// argument, substitute into that default template argument and |
| 3118 | /// return the corresponding template argument. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3119 | TemplateArgumentLoc |
Douglas Gregor | 51ffb0c | 2009-11-25 18:55:14 +0000 | [diff] [blame] | 3120 | Sema::SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, |
| 3121 | SourceLocation TemplateLoc, |
| 3122 | SourceLocation RAngleLoc, |
| 3123 | Decl *Param, |
Richard Smith | 305e5b4 | 2013-07-04 01:01:24 +0000 | [diff] [blame] | 3124 | SmallVectorImpl<TemplateArgument> |
| 3125 | &Converted, |
| 3126 | bool &HasDefaultArg) { |
| 3127 | HasDefaultArg = false; |
| 3128 | |
| 3129 | if (TemplateTypeParmDecl *TypeParm = dyn_cast<TemplateTypeParmDecl>(Param)) { |
Douglas Gregor | 51ffb0c | 2009-11-25 18:55:14 +0000 | [diff] [blame] | 3130 | if (!TypeParm->hasDefaultArgument()) |
| 3131 | return TemplateArgumentLoc(); |
| 3132 | |
Richard Smith | 305e5b4 | 2013-07-04 01:01:24 +0000 | [diff] [blame] | 3133 | HasDefaultArg = true; |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 3134 | TypeSourceInfo *DI = SubstDefaultTemplateArgument(*this, Template, |
Douglas Gregor | 51ffb0c | 2009-11-25 18:55:14 +0000 | [diff] [blame] | 3135 | TemplateLoc, |
| 3136 | RAngleLoc, |
| 3137 | TypeParm, |
| 3138 | Converted); |
| 3139 | if (DI) |
| 3140 | return TemplateArgumentLoc(TemplateArgument(DI->getType()), DI); |
| 3141 | |
| 3142 | return TemplateArgumentLoc(); |
| 3143 | } |
| 3144 | |
| 3145 | if (NonTypeTemplateParmDecl *NonTypeParm |
| 3146 | = dyn_cast<NonTypeTemplateParmDecl>(Param)) { |
| 3147 | if (!NonTypeParm->hasDefaultArgument()) |
| 3148 | return TemplateArgumentLoc(); |
| 3149 | |
Richard Smith | 305e5b4 | 2013-07-04 01:01:24 +0000 | [diff] [blame] | 3150 | HasDefaultArg = true; |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 3151 | ExprResult Arg = SubstDefaultTemplateArgument(*this, Template, |
Douglas Gregor | b6744ef | 2011-03-02 17:09:35 +0000 | [diff] [blame] | 3152 | TemplateLoc, |
| 3153 | RAngleLoc, |
| 3154 | NonTypeParm, |
| 3155 | Converted); |
Douglas Gregor | 51ffb0c | 2009-11-25 18:55:14 +0000 | [diff] [blame] | 3156 | if (Arg.isInvalid()) |
| 3157 | return TemplateArgumentLoc(); |
| 3158 | |
| 3159 | Expr *ArgE = Arg.takeAs<Expr>(); |
| 3160 | return TemplateArgumentLoc(TemplateArgument(ArgE), ArgE); |
| 3161 | } |
| 3162 | |
| 3163 | TemplateTemplateParmDecl *TempTempParm |
| 3164 | = cast<TemplateTemplateParmDecl>(Param); |
| 3165 | if (!TempTempParm->hasDefaultArgument()) |
| 3166 | return TemplateArgumentLoc(); |
| 3167 | |
Richard Smith | 305e5b4 | 2013-07-04 01:01:24 +0000 | [diff] [blame] | 3168 | HasDefaultArg = true; |
Douglas Gregor | 1d752d7 | 2011-03-02 18:46:51 +0000 | [diff] [blame] | 3169 | NestedNameSpecifierLoc QualifierLoc; |
Douglas Gregor | 51ffb0c | 2009-11-25 18:55:14 +0000 | [diff] [blame] | 3170 | TemplateName TName = SubstDefaultTemplateArgument(*this, Template, |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3171 | TemplateLoc, |
Douglas Gregor | 51ffb0c | 2009-11-25 18:55:14 +0000 | [diff] [blame] | 3172 | RAngleLoc, |
| 3173 | TempTempParm, |
Douglas Gregor | b6744ef | 2011-03-02 17:09:35 +0000 | [diff] [blame] | 3174 | Converted, |
| 3175 | QualifierLoc); |
Douglas Gregor | 51ffb0c | 2009-11-25 18:55:14 +0000 | [diff] [blame] | 3176 | if (TName.isNull()) |
| 3177 | return TemplateArgumentLoc(); |
| 3178 | |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3179 | return TemplateArgumentLoc(TemplateArgument(TName), |
Douglas Gregor | b6744ef | 2011-03-02 17:09:35 +0000 | [diff] [blame] | 3180 | TempTempParm->getDefaultArgument().getTemplateQualifierLoc(), |
Douglas Gregor | 51ffb0c | 2009-11-25 18:55:14 +0000 | [diff] [blame] | 3181 | TempTempParm->getDefaultArgument().getTemplateNameLoc()); |
| 3182 | } |
| 3183 | |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3184 | /// \brief Check that the given template argument corresponds to the given |
| 3185 | /// template parameter. |
Douglas Gregor | 6952f1e | 2011-01-19 20:10:05 +0000 | [diff] [blame] | 3186 | /// |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3187 | /// \param Param The template parameter against which the argument will be |
Douglas Gregor | 6952f1e | 2011-01-19 20:10:05 +0000 | [diff] [blame] | 3188 | /// checked. |
| 3189 | /// |
| 3190 | /// \param Arg The template argument. |
| 3191 | /// |
| 3192 | /// \param Template The template in which the template argument resides. |
| 3193 | /// |
| 3194 | /// \param TemplateLoc The location of the template name for the template |
| 3195 | /// whose argument list we're matching. |
| 3196 | /// |
| 3197 | /// \param RAngleLoc The location of the right angle bracket ('>') that closes |
| 3198 | /// the template argument list. |
| 3199 | /// |
| 3200 | /// \param ArgumentPackIndex The index into the argument pack where this |
| 3201 | /// argument will be placed. Only valid if the parameter is a parameter pack. |
| 3202 | /// |
| 3203 | /// \param Converted The checked, converted argument will be added to the |
| 3204 | /// end of this small vector. |
| 3205 | /// |
| 3206 | /// \param CTAK Describes how we arrived at this particular template argument: |
| 3207 | /// explicitly written, deduced, etc. |
| 3208 | /// |
| 3209 | /// \returns true on error, false otherwise. |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3210 | bool Sema::CheckTemplateArgument(NamedDecl *Param, |
| 3211 | const TemplateArgumentLoc &Arg, |
Douglas Gregor | 54c53cc | 2011-01-04 23:35:54 +0000 | [diff] [blame] | 3212 | NamedDecl *Template, |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3213 | SourceLocation TemplateLoc, |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3214 | SourceLocation RAngleLoc, |
Douglas Gregor | 6952f1e | 2011-01-19 20:10:05 +0000 | [diff] [blame] | 3215 | unsigned ArgumentPackIndex, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 3216 | SmallVectorImpl<TemplateArgument> &Converted, |
Douglas Gregor | 02024a9 | 2010-03-28 02:42:43 +0000 | [diff] [blame] | 3217 | CheckTemplateArgumentKind CTAK) { |
Douglas Gregor | d9e1530 | 2009-11-11 19:41:09 +0000 | [diff] [blame] | 3218 | // Check template type parameters. |
| 3219 | if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(Param)) |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3220 | return CheckTemplateTypeArgument(TTP, Arg, Converted); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3221 | |
Douglas Gregor | d9e1530 | 2009-11-11 19:41:09 +0000 | [diff] [blame] | 3222 | // Check non-type template parameters. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3223 | if (NonTypeTemplateParmDecl *NTTP =dyn_cast<NonTypeTemplateParmDecl>(Param)) { |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3224 | // Do substitution on the type of the non-type template parameter |
Peter Collingbourne | 9f6f6a1 | 2010-12-10 17:08:53 +0000 | [diff] [blame] | 3225 | // with the template arguments we've seen thus far. But if the |
| 3226 | // template has a dependent context then we cannot substitute yet. |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3227 | QualType NTTPType = NTTP->getType(); |
Douglas Gregor | 6952f1e | 2011-01-19 20:10:05 +0000 | [diff] [blame] | 3228 | if (NTTP->isParameterPack() && NTTP->isExpandedParameterPack()) |
| 3229 | NTTPType = NTTP->getExpansionType(ArgumentPackIndex); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3230 | |
Peter Collingbourne | 9f6f6a1 | 2010-12-10 17:08:53 +0000 | [diff] [blame] | 3231 | if (NTTPType->isDependentType() && |
| 3232 | !isa<TemplateTemplateParmDecl>(Template) && |
| 3233 | !Template->getDeclContext()->isDependentContext()) { |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3234 | // Do substitution on the type of the non-type template parameter. |
| 3235 | InstantiatingTemplate Inst(*this, TemplateLoc, Template, |
Richard Smith | 7e54fb5 | 2012-07-16 01:09:10 +0000 | [diff] [blame] | 3236 | NTTP, Converted, |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3237 | SourceRange(TemplateLoc, RAngleLoc)); |
Richard Smith | ab91ef1 | 2012-07-08 02:38:24 +0000 | [diff] [blame] | 3238 | if (Inst) |
| 3239 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3240 | |
| 3241 | TemplateArgumentList TemplateArgs(TemplateArgumentList::OnStack, |
Douglas Gregor | 910f800 | 2010-11-07 23:05:16 +0000 | [diff] [blame] | 3242 | Converted.data(), Converted.size()); |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3243 | NTTPType = SubstType(NTTPType, |
| 3244 | MultiLevelTemplateArgumentList(TemplateArgs), |
| 3245 | NTTP->getLocation(), |
| 3246 | NTTP->getDeclName()); |
| 3247 | // If that worked, check the non-type template parameter type |
| 3248 | // for validity. |
| 3249 | if (!NTTPType.isNull()) |
| 3250 | NTTPType = CheckNonTypeTemplateParameterType(NTTPType, |
| 3251 | NTTP->getLocation()); |
| 3252 | if (NTTPType.isNull()) |
| 3253 | return true; |
| 3254 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3255 | |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3256 | switch (Arg.getArgument().getKind()) { |
| 3257 | case TemplateArgument::Null: |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 3258 | llvm_unreachable("Should never see a NULL template argument here"); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3259 | |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3260 | case TemplateArgument::Expression: { |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3261 | TemplateArgument Result; |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 3262 | ExprResult Res = |
| 3263 | CheckTemplateArgument(NTTP, NTTPType, Arg.getArgument().getAsExpr(), |
| 3264 | Result, CTAK); |
| 3265 | if (Res.isInvalid()) |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3266 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3267 | |
Douglas Gregor | 910f800 | 2010-11-07 23:05:16 +0000 | [diff] [blame] | 3268 | Converted.push_back(Result); |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3269 | break; |
| 3270 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3271 | |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3272 | case TemplateArgument::Declaration: |
| 3273 | case TemplateArgument::Integral: |
Eli Friedman | d7a6b16 | 2012-09-26 02:36:12 +0000 | [diff] [blame] | 3274 | case TemplateArgument::NullPtr: |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3275 | // We've already checked this template argument, so just copy |
| 3276 | // it to the list of converted arguments. |
Douglas Gregor | 910f800 | 2010-11-07 23:05:16 +0000 | [diff] [blame] | 3277 | Converted.push_back(Arg.getArgument()); |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3278 | break; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3279 | |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3280 | case TemplateArgument::Template: |
Douglas Gregor | a7fc901 | 2011-01-05 18:58:31 +0000 | [diff] [blame] | 3281 | case TemplateArgument::TemplateExpansion: |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3282 | // We were given a template template argument. It may not be ill-formed; |
| 3283 | // see below. |
| 3284 | if (DependentTemplateName *DTN |
Douglas Gregor | a7fc901 | 2011-01-05 18:58:31 +0000 | [diff] [blame] | 3285 | = Arg.getArgument().getAsTemplateOrTemplatePattern() |
| 3286 | .getAsDependentTemplateName()) { |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3287 | // We have a template argument such as \c T::template X, which we |
| 3288 | // parsed as a template template argument. However, since we now |
| 3289 | // know that we need a non-type template argument, convert this |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 3290 | // template name into an expression. |
| 3291 | |
| 3292 | DeclarationNameInfo NameInfo(DTN->getIdentifier(), |
| 3293 | Arg.getTemplateNameLoc()); |
| 3294 | |
Douglas Gregor | 00cf3cc | 2011-02-25 20:49:16 +0000 | [diff] [blame] | 3295 | CXXScopeSpec SS; |
Douglas Gregor | b6744ef | 2011-03-02 17:09:35 +0000 | [diff] [blame] | 3296 | SS.Adopt(Arg.getTemplateQualifierLoc()); |
Abramo Bagnara | e4b9276 | 2012-01-27 09:46:47 +0000 | [diff] [blame] | 3297 | // FIXME: the template-template arg was a DependentTemplateName, |
| 3298 | // so it was provided with a template keyword. However, its source |
| 3299 | // location is not stored in the template argument structure. |
| 3300 | SourceLocation TemplateKWLoc; |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 3301 | ExprResult E = Owned(DependentScopeDeclRefExpr::Create(Context, |
Douglas Gregor | 00cf3cc | 2011-02-25 20:49:16 +0000 | [diff] [blame] | 3302 | SS.getWithLocInContext(Context), |
Abramo Bagnara | e4b9276 | 2012-01-27 09:46:47 +0000 | [diff] [blame] | 3303 | TemplateKWLoc, |
| 3304 | NameInfo, 0)); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3305 | |
Douglas Gregor | a7fc901 | 2011-01-05 18:58:31 +0000 | [diff] [blame] | 3306 | // If we parsed the template argument as a pack expansion, create a |
| 3307 | // pack expansion expression. |
| 3308 | if (Arg.getArgument().getKind() == TemplateArgument::TemplateExpansion){ |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 3309 | E = ActOnPackExpansion(E.take(), Arg.getTemplateEllipsisLoc()); |
| 3310 | if (E.isInvalid()) |
Douglas Gregor | a7fc901 | 2011-01-05 18:58:31 +0000 | [diff] [blame] | 3311 | return true; |
Douglas Gregor | a7fc901 | 2011-01-05 18:58:31 +0000 | [diff] [blame] | 3312 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3313 | |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3314 | TemplateArgument Result; |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 3315 | E = CheckTemplateArgument(NTTP, NTTPType, E.take(), Result); |
| 3316 | if (E.isInvalid()) |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3317 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3318 | |
Douglas Gregor | 910f800 | 2010-11-07 23:05:16 +0000 | [diff] [blame] | 3319 | Converted.push_back(Result); |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3320 | break; |
| 3321 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3322 | |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3323 | // We have a template argument that actually does refer to a class |
Richard Smith | 3e4c6c4 | 2011-05-05 21:57:07 +0000 | [diff] [blame] | 3324 | // template, alias template, or template template parameter, and |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3325 | // therefore cannot be a non-type template argument. |
| 3326 | Diag(Arg.getLocation(), diag::err_template_arg_must_be_expr) |
| 3327 | << Arg.getSourceRange(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3328 | |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3329 | Diag(Param->getLocation(), diag::note_template_param_here); |
| 3330 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3331 | |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3332 | case TemplateArgument::Type: { |
| 3333 | // We have a non-type template parameter but the template |
| 3334 | // argument is a type. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3335 | |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3336 | // C++ [temp.arg]p2: |
| 3337 | // In a template-argument, an ambiguity between a type-id and |
| 3338 | // an expression is resolved to a type-id, regardless of the |
| 3339 | // form of the corresponding template-parameter. |
| 3340 | // |
| 3341 | // We warn specifically about this case, since it can be rather |
| 3342 | // confusing for users. |
| 3343 | QualType T = Arg.getArgument().getAsType(); |
| 3344 | SourceRange SR = Arg.getSourceRange(); |
| 3345 | if (T->isFunctionType()) |
| 3346 | Diag(SR.getBegin(), diag::err_template_arg_nontype_ambig) << SR << T; |
| 3347 | else |
| 3348 | Diag(SR.getBegin(), diag::err_template_arg_must_be_expr) << SR; |
| 3349 | Diag(Param->getLocation(), diag::note_template_param_here); |
| 3350 | return true; |
| 3351 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3352 | |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3353 | case TemplateArgument::Pack: |
Jeffrey Yasskin | 9f61aa9 | 2009-12-12 05:05:38 +0000 | [diff] [blame] | 3354 | llvm_unreachable("Caller must expand template argument packs"); |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3355 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3356 | |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3357 | return false; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3358 | } |
| 3359 | |
| 3360 | |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3361 | // Check template template parameters. |
| 3362 | TemplateTemplateParmDecl *TempParm = cast<TemplateTemplateParmDecl>(Param); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3363 | |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3364 | // Substitute into the template parameter list of the template |
| 3365 | // template parameter, since previously-supplied template arguments |
| 3366 | // may appear within the template template parameter. |
| 3367 | { |
| 3368 | // Set up a template instantiation context. |
| 3369 | LocalInstantiationScope Scope(*this); |
| 3370 | InstantiatingTemplate Inst(*this, TemplateLoc, Template, |
Richard Smith | 7e54fb5 | 2012-07-16 01:09:10 +0000 | [diff] [blame] | 3371 | TempParm, Converted, |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3372 | SourceRange(TemplateLoc, RAngleLoc)); |
Richard Smith | ab91ef1 | 2012-07-08 02:38:24 +0000 | [diff] [blame] | 3373 | if (Inst) |
| 3374 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3375 | |
| 3376 | TemplateArgumentList TemplateArgs(TemplateArgumentList::OnStack, |
Douglas Gregor | 910f800 | 2010-11-07 23:05:16 +0000 | [diff] [blame] | 3377 | Converted.data(), Converted.size()); |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3378 | TempParm = cast_or_null<TemplateTemplateParmDecl>( |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3379 | SubstDecl(TempParm, CurContext, |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3380 | MultiLevelTemplateArgumentList(TemplateArgs))); |
| 3381 | if (!TempParm) |
| 3382 | return true; |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3383 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3384 | |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3385 | switch (Arg.getArgument().getKind()) { |
| 3386 | case TemplateArgument::Null: |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 3387 | llvm_unreachable("Should never see a NULL template argument here"); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3388 | |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3389 | case TemplateArgument::Template: |
Douglas Gregor | a7fc901 | 2011-01-05 18:58:31 +0000 | [diff] [blame] | 3390 | case TemplateArgument::TemplateExpansion: |
Richard Smith | 6964b3f | 2012-09-07 02:06:42 +0000 | [diff] [blame] | 3391 | if (CheckTemplateArgument(TempParm, Arg, ArgumentPackIndex)) |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3392 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3393 | |
Douglas Gregor | 910f800 | 2010-11-07 23:05:16 +0000 | [diff] [blame] | 3394 | Converted.push_back(Arg.getArgument()); |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3395 | break; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3396 | |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3397 | case TemplateArgument::Expression: |
| 3398 | case TemplateArgument::Type: |
| 3399 | // We have a template template parameter but the template |
| 3400 | // argument does not refer to a template. |
Richard Smith | 3e4c6c4 | 2011-05-05 21:57:07 +0000 | [diff] [blame] | 3401 | Diag(Arg.getLocation(), diag::err_template_arg_must_be_template) |
Richard Smith | 80ad52f | 2013-01-02 11:42:31 +0000 | [diff] [blame] | 3402 | << getLangOpts().CPlusPlus11; |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3403 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3404 | |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3405 | case TemplateArgument::Declaration: |
David Blaikie | 7530c03 | 2012-01-17 06:56:22 +0000 | [diff] [blame] | 3406 | llvm_unreachable("Declaration argument with template template parameter"); |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3407 | case TemplateArgument::Integral: |
David Blaikie | 7530c03 | 2012-01-17 06:56:22 +0000 | [diff] [blame] | 3408 | llvm_unreachable("Integral argument with template template parameter"); |
Eli Friedman | d7a6b16 | 2012-09-26 02:36:12 +0000 | [diff] [blame] | 3409 | case TemplateArgument::NullPtr: |
| 3410 | llvm_unreachable("Null pointer argument with template template parameter"); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3411 | |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3412 | case TemplateArgument::Pack: |
Jeffrey Yasskin | 9f61aa9 | 2009-12-12 05:05:38 +0000 | [diff] [blame] | 3413 | llvm_unreachable("Caller must expand template argument packs"); |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3414 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3415 | |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3416 | return false; |
| 3417 | } |
| 3418 | |
Douglas Gregor | 8fbbae5 | 2012-02-03 07:34:46 +0000 | [diff] [blame] | 3419 | /// \brief Diagnose an arity mismatch in the |
| 3420 | static bool diagnoseArityMismatch(Sema &S, TemplateDecl *Template, |
| 3421 | SourceLocation TemplateLoc, |
| 3422 | TemplateArgumentListInfo &TemplateArgs) { |
| 3423 | TemplateParameterList *Params = Template->getTemplateParameters(); |
| 3424 | unsigned NumParams = Params->size(); |
| 3425 | unsigned NumArgs = TemplateArgs.size(); |
| 3426 | |
| 3427 | SourceRange Range; |
| 3428 | if (NumArgs > NumParams) |
| 3429 | Range = SourceRange(TemplateArgs[NumParams].getLocation(), |
| 3430 | TemplateArgs.getRAngleLoc()); |
| 3431 | S.Diag(TemplateLoc, diag::err_template_arg_list_different_arity) |
| 3432 | << (NumArgs > NumParams) |
| 3433 | << (isa<ClassTemplateDecl>(Template)? 0 : |
| 3434 | isa<FunctionTemplateDecl>(Template)? 1 : |
| 3435 | isa<TemplateTemplateParmDecl>(Template)? 2 : 3) |
| 3436 | << Template << Range; |
| 3437 | S.Diag(Template->getLocation(), diag::note_template_decl_here) |
| 3438 | << Params->getSourceRange(); |
| 3439 | return true; |
| 3440 | } |
| 3441 | |
Richard Smith | 6964b3f | 2012-09-07 02:06:42 +0000 | [diff] [blame] | 3442 | /// \brief Check whether the template parameter is a pack expansion, and if so, |
| 3443 | /// determine the number of parameters produced by that expansion. For instance: |
| 3444 | /// |
| 3445 | /// \code |
| 3446 | /// template<typename ...Ts> struct A { |
| 3447 | /// template<Ts ...NTs, template<Ts> class ...TTs, typename ...Us> struct B; |
| 3448 | /// }; |
| 3449 | /// \endcode |
| 3450 | /// |
| 3451 | /// In \c A<int,int>::B, \c NTs and \c TTs have expanded pack size 2, and \c Us |
| 3452 | /// is not a pack expansion, so returns an empty Optional. |
David Blaikie | dc84cd5 | 2013-02-20 22:23:23 +0000 | [diff] [blame] | 3453 | static Optional<unsigned> getExpandedPackSize(NamedDecl *Param) { |
Richard Smith | 6964b3f | 2012-09-07 02:06:42 +0000 | [diff] [blame] | 3454 | if (NonTypeTemplateParmDecl *NTTP |
| 3455 | = dyn_cast<NonTypeTemplateParmDecl>(Param)) { |
| 3456 | if (NTTP->isExpandedParameterPack()) |
| 3457 | return NTTP->getNumExpansionTypes(); |
| 3458 | } |
| 3459 | |
| 3460 | if (TemplateTemplateParmDecl *TTP |
| 3461 | = dyn_cast<TemplateTemplateParmDecl>(Param)) { |
| 3462 | if (TTP->isExpandedParameterPack()) |
| 3463 | return TTP->getNumExpansionTemplateParameters(); |
| 3464 | } |
| 3465 | |
David Blaikie | 66874fb | 2013-02-21 01:47:18 +0000 | [diff] [blame] | 3466 | return None; |
Richard Smith | 6964b3f | 2012-09-07 02:06:42 +0000 | [diff] [blame] | 3467 | } |
| 3468 | |
Douglas Gregor | c15cb38 | 2009-02-09 23:23:08 +0000 | [diff] [blame] | 3469 | /// \brief Check that the given template argument list is well-formed |
| 3470 | /// for specializing the given template. |
| 3471 | bool Sema::CheckTemplateArgumentList(TemplateDecl *Template, |
| 3472 | SourceLocation TemplateLoc, |
Douglas Gregor | 6771423 | 2011-03-03 02:41:12 +0000 | [diff] [blame] | 3473 | TemplateArgumentListInfo &TemplateArgs, |
Douglas Gregor | 16134c6 | 2009-07-01 00:28:38 +0000 | [diff] [blame] | 3474 | bool PartialTemplateArgs, |
Douglas Gregor | b70126a | 2012-02-03 17:16:23 +0000 | [diff] [blame] | 3475 | SmallVectorImpl<TemplateArgument> &Converted, |
| 3476 | bool *ExpansionIntoFixedList) { |
| 3477 | if (ExpansionIntoFixedList) |
| 3478 | *ExpansionIntoFixedList = false; |
| 3479 | |
Douglas Gregor | c15cb38 | 2009-02-09 23:23:08 +0000 | [diff] [blame] | 3480 | TemplateParameterList *Params = Template->getTemplateParameters(); |
Douglas Gregor | c15cb38 | 2009-02-09 23:23:08 +0000 | [diff] [blame] | 3481 | |
John McCall | d5532b6 | 2009-11-23 01:53:49 +0000 | [diff] [blame] | 3482 | SourceLocation RAngleLoc = TemplateArgs.getRAngleLoc(); |
| 3483 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3484 | // C++ [temp.arg]p1: |
Douglas Gregor | c15cb38 | 2009-02-09 23:23:08 +0000 | [diff] [blame] | 3485 | // [...] The type and form of each template-argument specified in |
| 3486 | // a template-id shall match the type and form specified for the |
| 3487 | // corresponding parameter declared by the template in its |
| 3488 | // template-parameter-list. |
Douglas Gregor | 6771423 | 2011-03-03 02:41:12 +0000 | [diff] [blame] | 3489 | bool isTemplateTemplateParameter = isa<TemplateTemplateParmDecl>(Template); |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 3490 | SmallVector<TemplateArgument, 2> ArgumentPack; |
Richard Smith | 6964b3f | 2012-09-07 02:06:42 +0000 | [diff] [blame] | 3491 | unsigned ArgIdx = 0, NumArgs = TemplateArgs.size(); |
Douglas Gregor | 8dde14e | 2011-01-24 16:14:37 +0000 | [diff] [blame] | 3492 | LocalInstantiationScope InstScope(*this, true); |
Richard Smith | 6964b3f | 2012-09-07 02:06:42 +0000 | [diff] [blame] | 3493 | for (TemplateParameterList::iterator Param = Params->begin(), |
| 3494 | ParamEnd = Params->end(); |
| 3495 | Param != ParamEnd; /* increment in loop */) { |
| 3496 | // If we have an expanded parameter pack, make sure we don't have too |
| 3497 | // many arguments. |
David Blaikie | dc84cd5 | 2013-02-20 22:23:23 +0000 | [diff] [blame] | 3498 | if (Optional<unsigned> Expansions = getExpandedPackSize(*Param)) { |
Richard Smith | 6964b3f | 2012-09-07 02:06:42 +0000 | [diff] [blame] | 3499 | if (*Expansions == ArgumentPack.size()) { |
| 3500 | // We're done with this parameter pack. Pack up its arguments and add |
| 3501 | // them to the list. |
Eli Friedman | d7a6b16 | 2012-09-26 02:36:12 +0000 | [diff] [blame] | 3502 | Converted.push_back( |
| 3503 | TemplateArgument::CreatePackCopy(Context, |
| 3504 | ArgumentPack.data(), |
| 3505 | ArgumentPack.size())); |
| 3506 | ArgumentPack.clear(); |
| 3507 | |
Richard Smith | 6964b3f | 2012-09-07 02:06:42 +0000 | [diff] [blame] | 3508 | // This argument is assigned to the next parameter. |
| 3509 | ++Param; |
| 3510 | continue; |
| 3511 | } else if (ArgIdx == NumArgs && !PartialTemplateArgs) { |
| 3512 | // Not enough arguments for this parameter pack. |
| 3513 | Diag(TemplateLoc, diag::err_template_arg_list_different_arity) |
| 3514 | << false |
| 3515 | << (isa<ClassTemplateDecl>(Template)? 0 : |
| 3516 | isa<FunctionTemplateDecl>(Template)? 1 : |
| 3517 | isa<TemplateTemplateParmDecl>(Template)? 2 : 3) |
| 3518 | << Template; |
| 3519 | Diag(Template->getLocation(), diag::note_template_decl_here) |
| 3520 | << Params->getSourceRange(); |
| 3521 | return true; |
Douglas Gregor | 6952f1e | 2011-01-19 20:10:05 +0000 | [diff] [blame] | 3522 | } |
Richard Smith | 6964b3f | 2012-09-07 02:06:42 +0000 | [diff] [blame] | 3523 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3524 | |
Richard Smith | 6964b3f | 2012-09-07 02:06:42 +0000 | [diff] [blame] | 3525 | if (ArgIdx < NumArgs) { |
Douglas Gregor | f35f828 | 2009-11-11 21:54:23 +0000 | [diff] [blame] | 3526 | // Check the template argument we were given. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3527 | if (CheckTemplateArgument(*Param, TemplateArgs[ArgIdx], Template, |
| 3528 | TemplateLoc, RAngleLoc, |
Douglas Gregor | 6952f1e | 2011-01-19 20:10:05 +0000 | [diff] [blame] | 3529 | ArgumentPack.size(), Converted)) |
Douglas Gregor | f35f828 | 2009-11-11 21:54:23 +0000 | [diff] [blame] | 3530 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3531 | |
Richard Smith | 6964b3f | 2012-09-07 02:06:42 +0000 | [diff] [blame] | 3532 | // We're now done with this argument. |
| 3533 | ++ArgIdx; |
| 3534 | |
Douglas Gregor | 14be16b | 2010-12-20 16:57:52 +0000 | [diff] [blame] | 3535 | if ((*Param)->isTemplateParameterPack()) { |
| 3536 | // The template parameter was a template parameter pack, so take the |
| 3537 | // deduced argument and place it on the argument pack. Note that we |
| 3538 | // stay on the same template parameter so that we can deduce more |
| 3539 | // arguments. |
Robert Wilhelm | 344472e | 2013-08-23 16:11:15 +0000 | [diff] [blame] | 3540 | ArgumentPack.push_back(Converted.pop_back_val()); |
Douglas Gregor | 14be16b | 2010-12-20 16:57:52 +0000 | [diff] [blame] | 3541 | } else { |
| 3542 | // Move to the next template parameter. |
| 3543 | ++Param; |
| 3544 | } |
Richard Smith | 6964b3f | 2012-09-07 02:06:42 +0000 | [diff] [blame] | 3545 | |
| 3546 | // If we just saw a pack expansion, then directly convert the remaining |
| 3547 | // arguments, because we don't know what parameters they'll match up |
| 3548 | // with. |
| 3549 | if (TemplateArgs[ArgIdx-1].getArgument().isPackExpansion()) { |
| 3550 | bool InFinalParameterPack = Param != ParamEnd && |
| 3551 | Param + 1 == ParamEnd && |
| 3552 | (*Param)->isTemplateParameterPack() && |
| 3553 | !getExpandedPackSize(*Param); |
| 3554 | |
| 3555 | if (!InFinalParameterPack && !ArgumentPack.empty()) { |
| 3556 | // If we were part way through filling in an expanded parameter pack, |
| 3557 | // fall back to just producing individual arguments. |
| 3558 | Converted.insert(Converted.end(), |
| 3559 | ArgumentPack.begin(), ArgumentPack.end()); |
| 3560 | ArgumentPack.clear(); |
| 3561 | } |
| 3562 | |
| 3563 | while (ArgIdx < NumArgs) { |
| 3564 | if (InFinalParameterPack) |
| 3565 | ArgumentPack.push_back(TemplateArgs[ArgIdx].getArgument()); |
| 3566 | else |
| 3567 | Converted.push_back(TemplateArgs[ArgIdx].getArgument()); |
| 3568 | ++ArgIdx; |
| 3569 | } |
| 3570 | |
| 3571 | // Push the argument pack onto the list of converted arguments. |
| 3572 | if (InFinalParameterPack) { |
Eli Friedman | d7a6b16 | 2012-09-26 02:36:12 +0000 | [diff] [blame] | 3573 | Converted.push_back( |
| 3574 | TemplateArgument::CreatePackCopy(Context, |
| 3575 | ArgumentPack.data(), |
| 3576 | ArgumentPack.size())); |
| 3577 | ArgumentPack.clear(); |
Richard Smith | 6964b3f | 2012-09-07 02:06:42 +0000 | [diff] [blame] | 3578 | } else if (ExpansionIntoFixedList) { |
| 3579 | // We have expanded a pack into a fixed list. |
| 3580 | *ExpansionIntoFixedList = true; |
| 3581 | } |
| 3582 | |
| 3583 | return false; |
Douglas Gregor | 8fbbae5 | 2012-02-03 07:34:46 +0000 | [diff] [blame] | 3584 | } |
Richard Smith | 6964b3f | 2012-09-07 02:06:42 +0000 | [diff] [blame] | 3585 | |
Douglas Gregor | f35f828 | 2009-11-11 21:54:23 +0000 | [diff] [blame] | 3586 | continue; |
Douglas Gregor | 3e00bad | 2009-02-17 01:05:43 +0000 | [diff] [blame] | 3587 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3588 | |
Douglas Gregor | 8735b29 | 2011-06-03 02:59:40 +0000 | [diff] [blame] | 3589 | // If we're checking a partial template argument list, we're done. |
| 3590 | if (PartialTemplateArgs) { |
| 3591 | if ((*Param)->isTemplateParameterPack() && !ArgumentPack.empty()) |
| 3592 | Converted.push_back(TemplateArgument::CreatePackCopy(Context, |
| 3593 | ArgumentPack.data(), |
| 3594 | ArgumentPack.size())); |
| 3595 | |
Richard Smith | 6964b3f | 2012-09-07 02:06:42 +0000 | [diff] [blame] | 3596 | return false; |
Douglas Gregor | 8735b29 | 2011-06-03 02:59:40 +0000 | [diff] [blame] | 3597 | } |
| 3598 | |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3599 | // If we have a template parameter pack with no more corresponding |
Douglas Gregor | 14be16b | 2010-12-20 16:57:52 +0000 | [diff] [blame] | 3600 | // arguments, just break out now and we'll fill in the argument pack below. |
Richard Smith | 6964b3f | 2012-09-07 02:06:42 +0000 | [diff] [blame] | 3601 | if ((*Param)->isTemplateParameterPack()) { |
| 3602 | assert(!getExpandedPackSize(*Param) && |
| 3603 | "Should have dealt with this already"); |
| 3604 | |
| 3605 | // A non-expanded parameter pack before the end of the parameter list |
| 3606 | // only occurs for an ill-formed template parameter list, unless we've |
| 3607 | // got a partial argument list for a function template, so just bail out. |
| 3608 | if (Param + 1 != ParamEnd) |
| 3609 | return true; |
| 3610 | |
Eli Friedman | d7a6b16 | 2012-09-26 02:36:12 +0000 | [diff] [blame] | 3611 | Converted.push_back(TemplateArgument::CreatePackCopy(Context, |
| 3612 | ArgumentPack.data(), |
| 3613 | ArgumentPack.size())); |
| 3614 | ArgumentPack.clear(); |
Richard Smith | 6964b3f | 2012-09-07 02:06:42 +0000 | [diff] [blame] | 3615 | |
| 3616 | ++Param; |
| 3617 | continue; |
| 3618 | } |
| 3619 | |
Douglas Gregor | 8fbbae5 | 2012-02-03 07:34:46 +0000 | [diff] [blame] | 3620 | // Check whether we have a default argument. |
Douglas Gregor | f35f828 | 2009-11-11 21:54:23 +0000 | [diff] [blame] | 3621 | TemplateArgumentLoc Arg; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3622 | |
Douglas Gregor | f35f828 | 2009-11-11 21:54:23 +0000 | [diff] [blame] | 3623 | // Retrieve the default template argument from the template |
| 3624 | // parameter. For each kind of template parameter, we substitute the |
| 3625 | // template arguments provided thus far and any "outer" template arguments |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3626 | // (when the template parameter was part of a nested template) into |
Douglas Gregor | f35f828 | 2009-11-11 21:54:23 +0000 | [diff] [blame] | 3627 | // the default argument. |
| 3628 | if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*Param)) { |
Douglas Gregor | 8fbbae5 | 2012-02-03 07:34:46 +0000 | [diff] [blame] | 3629 | if (!TTP->hasDefaultArgument()) |
| 3630 | return diagnoseArityMismatch(*this, Template, TemplateLoc, |
| 3631 | TemplateArgs); |
Douglas Gregor | f35f828 | 2009-11-11 21:54:23 +0000 | [diff] [blame] | 3632 | |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3633 | TypeSourceInfo *ArgType = SubstDefaultTemplateArgument(*this, |
Douglas Gregor | f35f828 | 2009-11-11 21:54:23 +0000 | [diff] [blame] | 3634 | Template, |
| 3635 | TemplateLoc, |
| 3636 | RAngleLoc, |
| 3637 | TTP, |
| 3638 | Converted); |
| 3639 | if (!ArgType) |
| 3640 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3641 | |
Douglas Gregor | f35f828 | 2009-11-11 21:54:23 +0000 | [diff] [blame] | 3642 | Arg = TemplateArgumentLoc(TemplateArgument(ArgType->getType()), |
| 3643 | ArgType); |
| 3644 | } else if (NonTypeTemplateParmDecl *NTTP |
| 3645 | = dyn_cast<NonTypeTemplateParmDecl>(*Param)) { |
Douglas Gregor | 8fbbae5 | 2012-02-03 07:34:46 +0000 | [diff] [blame] | 3646 | if (!NTTP->hasDefaultArgument()) |
| 3647 | return diagnoseArityMismatch(*this, Template, TemplateLoc, |
| 3648 | TemplateArgs); |
Douglas Gregor | f35f828 | 2009-11-11 21:54:23 +0000 | [diff] [blame] | 3649 | |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 3650 | ExprResult E = SubstDefaultTemplateArgument(*this, Template, |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3651 | TemplateLoc, |
| 3652 | RAngleLoc, |
| 3653 | NTTP, |
Douglas Gregor | f35f828 | 2009-11-11 21:54:23 +0000 | [diff] [blame] | 3654 | Converted); |
| 3655 | if (E.isInvalid()) |
| 3656 | return true; |
| 3657 | |
| 3658 | Expr *Ex = E.takeAs<Expr>(); |
| 3659 | Arg = TemplateArgumentLoc(TemplateArgument(Ex), Ex); |
| 3660 | } else { |
| 3661 | TemplateTemplateParmDecl *TempParm |
| 3662 | = cast<TemplateTemplateParmDecl>(*Param); |
| 3663 | |
Douglas Gregor | 8fbbae5 | 2012-02-03 07:34:46 +0000 | [diff] [blame] | 3664 | if (!TempParm->hasDefaultArgument()) |
| 3665 | return diagnoseArityMismatch(*this, Template, TemplateLoc, |
| 3666 | TemplateArgs); |
Douglas Gregor | f35f828 | 2009-11-11 21:54:23 +0000 | [diff] [blame] | 3667 | |
Douglas Gregor | 1d752d7 | 2011-03-02 18:46:51 +0000 | [diff] [blame] | 3668 | NestedNameSpecifierLoc QualifierLoc; |
Douglas Gregor | f35f828 | 2009-11-11 21:54:23 +0000 | [diff] [blame] | 3669 | TemplateName Name = SubstDefaultTemplateArgument(*this, Template, |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3670 | TemplateLoc, |
| 3671 | RAngleLoc, |
Douglas Gregor | f35f828 | 2009-11-11 21:54:23 +0000 | [diff] [blame] | 3672 | TempParm, |
Douglas Gregor | b6744ef | 2011-03-02 17:09:35 +0000 | [diff] [blame] | 3673 | Converted, |
| 3674 | QualifierLoc); |
Douglas Gregor | f35f828 | 2009-11-11 21:54:23 +0000 | [diff] [blame] | 3675 | if (Name.isNull()) |
| 3676 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3677 | |
Douglas Gregor | b6744ef | 2011-03-02 17:09:35 +0000 | [diff] [blame] | 3678 | Arg = TemplateArgumentLoc(TemplateArgument(Name), QualifierLoc, |
| 3679 | TempParm->getDefaultArgument().getTemplateNameLoc()); |
Douglas Gregor | f35f828 | 2009-11-11 21:54:23 +0000 | [diff] [blame] | 3680 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3681 | |
Douglas Gregor | f35f828 | 2009-11-11 21:54:23 +0000 | [diff] [blame] | 3682 | // Introduce an instantiation record that describes where we are using |
| 3683 | // the default template argument. |
Richard Smith | 7e54fb5 | 2012-07-16 01:09:10 +0000 | [diff] [blame] | 3684 | InstantiatingTemplate Instantiating(*this, RAngleLoc, Template, |
| 3685 | *Param, Converted, |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3686 | SourceRange(TemplateLoc, RAngleLoc)); |
Richard Smith | ab91ef1 | 2012-07-08 02:38:24 +0000 | [diff] [blame] | 3687 | if (Instantiating) |
| 3688 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3689 | |
Douglas Gregor | f35f828 | 2009-11-11 21:54:23 +0000 | [diff] [blame] | 3690 | // Check the default template argument. |
Douglas Gregor | d9e1530 | 2009-11-11 19:41:09 +0000 | [diff] [blame] | 3691 | if (CheckTemplateArgument(*Param, Arg, Template, TemplateLoc, |
Douglas Gregor | 6952f1e | 2011-01-19 20:10:05 +0000 | [diff] [blame] | 3692 | RAngleLoc, 0, Converted)) |
Douglas Gregor | e752641 | 2009-11-11 19:31:23 +0000 | [diff] [blame] | 3693 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3694 | |
Douglas Gregor | 6771423 | 2011-03-03 02:41:12 +0000 | [diff] [blame] | 3695 | // Core issue 150 (assumed resolution): if this is a template template |
| 3696 | // parameter, keep track of the default template arguments from the |
| 3697 | // template definition. |
| 3698 | if (isTemplateTemplateParameter) |
| 3699 | TemplateArgs.addArgument(Arg); |
| 3700 | |
Douglas Gregor | 14be16b | 2010-12-20 16:57:52 +0000 | [diff] [blame] | 3701 | // Move to the next template parameter and argument. |
| 3702 | ++Param; |
| 3703 | ++ArgIdx; |
Douglas Gregor | c15cb38 | 2009-02-09 23:23:08 +0000 | [diff] [blame] | 3704 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3705 | |
Douglas Gregor | 8fbbae5 | 2012-02-03 07:34:46 +0000 | [diff] [blame] | 3706 | // If we have any leftover arguments, then there were too many arguments. |
| 3707 | // Complain and fail. |
| 3708 | if (ArgIdx < NumArgs) |
| 3709 | return diagnoseArityMismatch(*this, Template, TemplateLoc, TemplateArgs); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3710 | |
Richard Smith | 6964b3f | 2012-09-07 02:06:42 +0000 | [diff] [blame] | 3711 | return false; |
Douglas Gregor | c15cb38 | 2009-02-09 23:23:08 +0000 | [diff] [blame] | 3712 | } |
| 3713 | |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3714 | namespace { |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3715 | class UnnamedLocalNoLinkageFinder |
| 3716 | : public TypeVisitor<UnnamedLocalNoLinkageFinder, bool> |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3717 | { |
| 3718 | Sema &S; |
| 3719 | SourceRange SR; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3720 | |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3721 | typedef TypeVisitor<UnnamedLocalNoLinkageFinder, bool> inherited; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3722 | |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3723 | public: |
| 3724 | UnnamedLocalNoLinkageFinder(Sema &S, SourceRange SR) : S(S), SR(SR) { } |
| 3725 | |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3726 | bool Visit(QualType T) { |
| 3727 | return inherited::Visit(T.getTypePtr()); |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3728 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3729 | |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3730 | #define TYPE(Class, Parent) \ |
| 3731 | bool Visit##Class##Type(const Class##Type *); |
| 3732 | #define ABSTRACT_TYPE(Class, Parent) \ |
| 3733 | bool Visit##Class##Type(const Class##Type *) { return false; } |
| 3734 | #define NON_CANONICAL_TYPE(Class, Parent) \ |
| 3735 | bool Visit##Class##Type(const Class##Type *) { return false; } |
| 3736 | #include "clang/AST/TypeNodes.def" |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3737 | |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3738 | bool VisitTagDecl(const TagDecl *Tag); |
| 3739 | bool VisitNestedNameSpecifier(NestedNameSpecifier *NNS); |
| 3740 | }; |
| 3741 | } |
| 3742 | |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3743 | bool UnnamedLocalNoLinkageFinder::VisitBuiltinType(const BuiltinType*) { |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3744 | return false; |
| 3745 | } |
| 3746 | |
| 3747 | bool UnnamedLocalNoLinkageFinder::VisitComplexType(const ComplexType* T) { |
| 3748 | return Visit(T->getElementType()); |
| 3749 | } |
| 3750 | |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3751 | bool UnnamedLocalNoLinkageFinder::VisitPointerType(const PointerType* T) { |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3752 | return Visit(T->getPointeeType()); |
| 3753 | } |
| 3754 | |
| 3755 | bool UnnamedLocalNoLinkageFinder::VisitBlockPointerType( |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3756 | const BlockPointerType* T) { |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3757 | return Visit(T->getPointeeType()); |
| 3758 | } |
| 3759 | |
| 3760 | bool UnnamedLocalNoLinkageFinder::VisitLValueReferenceType( |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3761 | const LValueReferenceType* T) { |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3762 | return Visit(T->getPointeeType()); |
| 3763 | } |
| 3764 | |
| 3765 | bool UnnamedLocalNoLinkageFinder::VisitRValueReferenceType( |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3766 | const RValueReferenceType* T) { |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3767 | return Visit(T->getPointeeType()); |
| 3768 | } |
| 3769 | |
| 3770 | bool UnnamedLocalNoLinkageFinder::VisitMemberPointerType( |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3771 | const MemberPointerType* T) { |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3772 | return Visit(T->getPointeeType()) || Visit(QualType(T->getClass(), 0)); |
| 3773 | } |
| 3774 | |
| 3775 | bool UnnamedLocalNoLinkageFinder::VisitConstantArrayType( |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3776 | const ConstantArrayType* T) { |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3777 | return Visit(T->getElementType()); |
| 3778 | } |
| 3779 | |
| 3780 | bool UnnamedLocalNoLinkageFinder::VisitIncompleteArrayType( |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3781 | const IncompleteArrayType* T) { |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3782 | return Visit(T->getElementType()); |
| 3783 | } |
| 3784 | |
| 3785 | bool UnnamedLocalNoLinkageFinder::VisitVariableArrayType( |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3786 | const VariableArrayType* T) { |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3787 | return Visit(T->getElementType()); |
| 3788 | } |
| 3789 | |
| 3790 | bool UnnamedLocalNoLinkageFinder::VisitDependentSizedArrayType( |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3791 | const DependentSizedArrayType* T) { |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3792 | return Visit(T->getElementType()); |
| 3793 | } |
| 3794 | |
| 3795 | bool UnnamedLocalNoLinkageFinder::VisitDependentSizedExtVectorType( |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3796 | const DependentSizedExtVectorType* T) { |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3797 | return Visit(T->getElementType()); |
| 3798 | } |
| 3799 | |
| 3800 | bool UnnamedLocalNoLinkageFinder::VisitVectorType(const VectorType* T) { |
| 3801 | return Visit(T->getElementType()); |
| 3802 | } |
| 3803 | |
| 3804 | bool UnnamedLocalNoLinkageFinder::VisitExtVectorType(const ExtVectorType* T) { |
| 3805 | return Visit(T->getElementType()); |
| 3806 | } |
| 3807 | |
| 3808 | bool UnnamedLocalNoLinkageFinder::VisitFunctionProtoType( |
| 3809 | const FunctionProtoType* T) { |
| 3810 | for (FunctionProtoType::arg_type_iterator A = T->arg_type_begin(), |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3811 | AEnd = T->arg_type_end(); |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3812 | A != AEnd; ++A) { |
| 3813 | if (Visit(*A)) |
| 3814 | return true; |
| 3815 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3816 | |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3817 | return Visit(T->getResultType()); |
| 3818 | } |
| 3819 | |
| 3820 | bool UnnamedLocalNoLinkageFinder::VisitFunctionNoProtoType( |
| 3821 | const FunctionNoProtoType* T) { |
| 3822 | return Visit(T->getResultType()); |
| 3823 | } |
| 3824 | |
| 3825 | bool UnnamedLocalNoLinkageFinder::VisitUnresolvedUsingType( |
| 3826 | const UnresolvedUsingType*) { |
| 3827 | return false; |
| 3828 | } |
| 3829 | |
| 3830 | bool UnnamedLocalNoLinkageFinder::VisitTypeOfExprType(const TypeOfExprType*) { |
| 3831 | return false; |
| 3832 | } |
| 3833 | |
| 3834 | bool UnnamedLocalNoLinkageFinder::VisitTypeOfType(const TypeOfType* T) { |
| 3835 | return Visit(T->getUnderlyingType()); |
| 3836 | } |
| 3837 | |
| 3838 | bool UnnamedLocalNoLinkageFinder::VisitDecltypeType(const DecltypeType*) { |
| 3839 | return false; |
| 3840 | } |
| 3841 | |
Sean Hunt | ca63c20 | 2011-05-24 22:41:36 +0000 | [diff] [blame] | 3842 | bool UnnamedLocalNoLinkageFinder::VisitUnaryTransformType( |
| 3843 | const UnaryTransformType*) { |
| 3844 | return false; |
| 3845 | } |
| 3846 | |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 3847 | bool UnnamedLocalNoLinkageFinder::VisitAutoType(const AutoType *T) { |
| 3848 | return Visit(T->getDeducedType()); |
| 3849 | } |
| 3850 | |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3851 | bool UnnamedLocalNoLinkageFinder::VisitRecordType(const RecordType* T) { |
| 3852 | return VisitTagDecl(T->getDecl()); |
| 3853 | } |
| 3854 | |
| 3855 | bool UnnamedLocalNoLinkageFinder::VisitEnumType(const EnumType* T) { |
| 3856 | return VisitTagDecl(T->getDecl()); |
| 3857 | } |
| 3858 | |
| 3859 | bool UnnamedLocalNoLinkageFinder::VisitTemplateTypeParmType( |
| 3860 | const TemplateTypeParmType*) { |
| 3861 | return false; |
| 3862 | } |
| 3863 | |
Douglas Gregor | c3069d6 | 2011-01-14 02:55:32 +0000 | [diff] [blame] | 3864 | bool UnnamedLocalNoLinkageFinder::VisitSubstTemplateTypeParmPackType( |
| 3865 | const SubstTemplateTypeParmPackType *) { |
| 3866 | return false; |
| 3867 | } |
| 3868 | |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3869 | bool UnnamedLocalNoLinkageFinder::VisitTemplateSpecializationType( |
| 3870 | const TemplateSpecializationType*) { |
| 3871 | return false; |
| 3872 | } |
| 3873 | |
| 3874 | bool UnnamedLocalNoLinkageFinder::VisitInjectedClassNameType( |
| 3875 | const InjectedClassNameType* T) { |
| 3876 | return VisitTagDecl(T->getDecl()); |
| 3877 | } |
| 3878 | |
| 3879 | bool UnnamedLocalNoLinkageFinder::VisitDependentNameType( |
| 3880 | const DependentNameType* T) { |
| 3881 | return VisitNestedNameSpecifier(T->getQualifier()); |
| 3882 | } |
| 3883 | |
| 3884 | bool UnnamedLocalNoLinkageFinder::VisitDependentTemplateSpecializationType( |
| 3885 | const DependentTemplateSpecializationType* T) { |
| 3886 | return VisitNestedNameSpecifier(T->getQualifier()); |
| 3887 | } |
| 3888 | |
Douglas Gregor | 7536dd5 | 2010-12-20 02:24:11 +0000 | [diff] [blame] | 3889 | bool UnnamedLocalNoLinkageFinder::VisitPackExpansionType( |
| 3890 | const PackExpansionType* T) { |
| 3891 | return Visit(T->getPattern()); |
| 3892 | } |
| 3893 | |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3894 | bool UnnamedLocalNoLinkageFinder::VisitObjCObjectType(const ObjCObjectType *) { |
| 3895 | return false; |
| 3896 | } |
| 3897 | |
| 3898 | bool UnnamedLocalNoLinkageFinder::VisitObjCInterfaceType( |
| 3899 | const ObjCInterfaceType *) { |
| 3900 | return false; |
| 3901 | } |
| 3902 | |
| 3903 | bool UnnamedLocalNoLinkageFinder::VisitObjCObjectPointerType( |
| 3904 | const ObjCObjectPointerType *) { |
| 3905 | return false; |
| 3906 | } |
| 3907 | |
Eli Friedman | b001de7 | 2011-10-06 23:00:33 +0000 | [diff] [blame] | 3908 | bool UnnamedLocalNoLinkageFinder::VisitAtomicType(const AtomicType* T) { |
| 3909 | return Visit(T->getValueType()); |
| 3910 | } |
| 3911 | |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3912 | bool UnnamedLocalNoLinkageFinder::VisitTagDecl(const TagDecl *Tag) { |
| 3913 | if (Tag->getDeclContext()->isFunctionOrMethod()) { |
Richard Smith | ebaf0e6 | 2011-10-18 20:49:44 +0000 | [diff] [blame] | 3914 | S.Diag(SR.getBegin(), |
Richard Smith | 80ad52f | 2013-01-02 11:42:31 +0000 | [diff] [blame] | 3915 | S.getLangOpts().CPlusPlus11 ? |
Richard Smith | ebaf0e6 | 2011-10-18 20:49:44 +0000 | [diff] [blame] | 3916 | diag::warn_cxx98_compat_template_arg_local_type : |
| 3917 | diag::ext_template_arg_local_type) |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3918 | << S.Context.getTypeDeclType(Tag) << SR; |
| 3919 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3920 | } |
| 3921 | |
John McCall | 83972f1 | 2013-03-09 00:54:27 +0000 | [diff] [blame] | 3922 | if (!Tag->hasNameForLinkage()) { |
Richard Smith | ebaf0e6 | 2011-10-18 20:49:44 +0000 | [diff] [blame] | 3923 | S.Diag(SR.getBegin(), |
Richard Smith | 80ad52f | 2013-01-02 11:42:31 +0000 | [diff] [blame] | 3924 | S.getLangOpts().CPlusPlus11 ? |
Richard Smith | ebaf0e6 | 2011-10-18 20:49:44 +0000 | [diff] [blame] | 3925 | diag::warn_cxx98_compat_template_arg_unnamed_type : |
| 3926 | diag::ext_template_arg_unnamed_type) << SR; |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3927 | S.Diag(Tag->getLocation(), diag::note_template_unnamed_type_here); |
| 3928 | return true; |
| 3929 | } |
| 3930 | |
| 3931 | return false; |
| 3932 | } |
| 3933 | |
| 3934 | bool UnnamedLocalNoLinkageFinder::VisitNestedNameSpecifier( |
| 3935 | NestedNameSpecifier *NNS) { |
| 3936 | if (NNS->getPrefix() && VisitNestedNameSpecifier(NNS->getPrefix())) |
| 3937 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3938 | |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3939 | switch (NNS->getKind()) { |
| 3940 | case NestedNameSpecifier::Identifier: |
| 3941 | case NestedNameSpecifier::Namespace: |
Douglas Gregor | 14aba76 | 2011-02-24 02:36:08 +0000 | [diff] [blame] | 3942 | case NestedNameSpecifier::NamespaceAlias: |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3943 | case NestedNameSpecifier::Global: |
| 3944 | return false; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3945 | |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3946 | case NestedNameSpecifier::TypeSpec: |
| 3947 | case NestedNameSpecifier::TypeSpecWithTemplate: |
| 3948 | return Visit(QualType(NNS->getAsType(), 0)); |
| 3949 | } |
David Blaikie | 7530c03 | 2012-01-17 06:56:22 +0000 | [diff] [blame] | 3950 | llvm_unreachable("Invalid NestedNameSpecifier::Kind!"); |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3951 | } |
| 3952 | |
| 3953 | |
Douglas Gregor | c15cb38 | 2009-02-09 23:23:08 +0000 | [diff] [blame] | 3954 | /// \brief Check a template argument against its corresponding |
| 3955 | /// template type parameter. |
| 3956 | /// |
| 3957 | /// This routine implements the semantics of C++ [temp.arg.type]. It |
| 3958 | /// returns true if an error occurred, and false otherwise. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3959 | bool Sema::CheckTemplateArgument(TemplateTypeParmDecl *Param, |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 3960 | TypeSourceInfo *ArgInfo) { |
| 3961 | assert(ArgInfo && "invalid TypeSourceInfo"); |
John McCall | 833ca99 | 2009-10-29 08:12:44 +0000 | [diff] [blame] | 3962 | QualType Arg = ArgInfo->getType(); |
Douglas Gregor | 0fddb97 | 2010-05-22 16:17:30 +0000 | [diff] [blame] | 3963 | SourceRange SR = ArgInfo->getTypeLoc().getSourceRange(); |
Chandler Carruth | 17fb855 | 2010-09-03 21:12:34 +0000 | [diff] [blame] | 3964 | |
| 3965 | if (Arg->isVariablyModifiedType()) { |
| 3966 | return Diag(SR.getBegin(), diag::err_variably_modified_template_arg) << Arg; |
Douglas Gregor | 4b52e25 | 2009-12-21 23:17:24 +0000 | [diff] [blame] | 3967 | } else if (Context.hasSameUnqualifiedType(Arg, Context.OverloadTy)) { |
Douglas Gregor | 4b52e25 | 2009-12-21 23:17:24 +0000 | [diff] [blame] | 3968 | return Diag(SR.getBegin(), diag::err_template_arg_overload_type) << SR; |
Douglas Gregor | c15cb38 | 2009-02-09 23:23:08 +0000 | [diff] [blame] | 3969 | } |
| 3970 | |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3971 | // C++03 [temp.arg.type]p2: |
| 3972 | // A local type, a type with no linkage, an unnamed type or a type |
| 3973 | // compounded from any of these types shall not be used as a |
| 3974 | // template-argument for a template type-parameter. |
| 3975 | // |
Richard Smith | ebaf0e6 | 2011-10-18 20:49:44 +0000 | [diff] [blame] | 3976 | // C++11 allows these, and even in C++03 we allow them as an extension with |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3977 | // a warning. |
Richard Smith | 80ad52f | 2013-01-02 11:42:31 +0000 | [diff] [blame] | 3978 | if (LangOpts.CPlusPlus11 ? |
Richard Smith | ebaf0e6 | 2011-10-18 20:49:44 +0000 | [diff] [blame] | 3979 | Diags.getDiagnosticLevel(diag::warn_cxx98_compat_template_arg_unnamed_type, |
| 3980 | SR.getBegin()) != DiagnosticsEngine::Ignored || |
| 3981 | Diags.getDiagnosticLevel(diag::warn_cxx98_compat_template_arg_local_type, |
| 3982 | SR.getBegin()) != DiagnosticsEngine::Ignored : |
| 3983 | Arg->hasUnnamedOrLocalType()) { |
Douglas Gregor | 5f3aeb6 | 2010-10-13 00:27:52 +0000 | [diff] [blame] | 3984 | UnnamedLocalNoLinkageFinder Finder(*this, SR); |
| 3985 | (void)Finder.Visit(Context.getCanonicalType(Arg)); |
| 3986 | } |
| 3987 | |
Douglas Gregor | c15cb38 | 2009-02-09 23:23:08 +0000 | [diff] [blame] | 3988 | return false; |
| 3989 | } |
| 3990 | |
Douglas Gregor | 4296361 | 2012-04-10 17:08:25 +0000 | [diff] [blame] | 3991 | enum NullPointerValueKind { |
| 3992 | NPV_NotNullPointer, |
| 3993 | NPV_NullPointer, |
| 3994 | NPV_Error |
| 3995 | }; |
| 3996 | |
| 3997 | /// \brief Determine whether the given template argument is a null pointer |
| 3998 | /// value of the appropriate type. |
| 3999 | static NullPointerValueKind |
| 4000 | isNullPointerValueTemplateArgument(Sema &S, NonTypeTemplateParmDecl *Param, |
| 4001 | QualType ParamType, Expr *Arg) { |
| 4002 | if (Arg->isValueDependent() || Arg->isTypeDependent()) |
| 4003 | return NPV_NotNullPointer; |
| 4004 | |
Richard Smith | 80ad52f | 2013-01-02 11:42:31 +0000 | [diff] [blame] | 4005 | if (!S.getLangOpts().CPlusPlus11) |
Douglas Gregor | 4296361 | 2012-04-10 17:08:25 +0000 | [diff] [blame] | 4006 | return NPV_NotNullPointer; |
| 4007 | |
| 4008 | // Determine whether we have a constant expression. |
Douglas Gregor | 50fadd1 | 2012-04-10 19:03:30 +0000 | [diff] [blame] | 4009 | ExprResult ArgRV = S.DefaultFunctionArrayConversion(Arg); |
| 4010 | if (ArgRV.isInvalid()) |
| 4011 | return NPV_Error; |
| 4012 | Arg = ArgRV.take(); |
| 4013 | |
Douglas Gregor | 4296361 | 2012-04-10 17:08:25 +0000 | [diff] [blame] | 4014 | Expr::EvalResult EvalResult; |
Dmitri Gribenko | cfa88f8 | 2013-01-12 19:30:44 +0000 | [diff] [blame] | 4015 | SmallVector<PartialDiagnosticAt, 8> Notes; |
Douglas Gregor | 50fadd1 | 2012-04-10 19:03:30 +0000 | [diff] [blame] | 4016 | EvalResult.Diag = &Notes; |
Douglas Gregor | 4296361 | 2012-04-10 17:08:25 +0000 | [diff] [blame] | 4017 | if (!Arg->EvaluateAsRValue(EvalResult, S.Context) || |
Douglas Gregor | 50fadd1 | 2012-04-10 19:03:30 +0000 | [diff] [blame] | 4018 | EvalResult.HasSideEffects) { |
| 4019 | SourceLocation DiagLoc = Arg->getExprLoc(); |
| 4020 | |
| 4021 | // If our only note is the usual "invalid subexpression" note, just point |
| 4022 | // the caret at its location rather than producing an essentially |
| 4023 | // redundant note. |
| 4024 | if (Notes.size() == 1 && Notes[0].second.getDiagID() == |
| 4025 | diag::note_invalid_subexpr_in_const_expr) { |
| 4026 | DiagLoc = Notes[0].first; |
| 4027 | Notes.clear(); |
| 4028 | } |
| 4029 | |
| 4030 | S.Diag(DiagLoc, diag::err_template_arg_not_address_constant) |
| 4031 | << Arg->getType() << Arg->getSourceRange(); |
| 4032 | for (unsigned I = 0, N = Notes.size(); I != N; ++I) |
| 4033 | S.Diag(Notes[I].first, Notes[I].second); |
| 4034 | |
| 4035 | S.Diag(Param->getLocation(), diag::note_template_param_here); |
| 4036 | return NPV_Error; |
| 4037 | } |
Douglas Gregor | 4296361 | 2012-04-10 17:08:25 +0000 | [diff] [blame] | 4038 | |
| 4039 | // C++11 [temp.arg.nontype]p1: |
| 4040 | // - an address constant expression of type std::nullptr_t |
| 4041 | if (Arg->getType()->isNullPtrType()) |
| 4042 | return NPV_NullPointer; |
| 4043 | |
| 4044 | // - a constant expression that evaluates to a null pointer value (4.10); or |
| 4045 | // - a constant expression that evaluates to a null member pointer value |
| 4046 | // (4.11); or |
| 4047 | if ((EvalResult.Val.isLValue() && !EvalResult.Val.getLValueBase()) || |
| 4048 | (EvalResult.Val.isMemberPointer() && |
| 4049 | !EvalResult.Val.getMemberPointerDecl())) { |
| 4050 | // If our expression has an appropriate type, we've succeeded. |
| 4051 | bool ObjCLifetimeConversion; |
| 4052 | if (S.Context.hasSameUnqualifiedType(Arg->getType(), ParamType) || |
| 4053 | S.IsQualificationConversion(Arg->getType(), ParamType, false, |
| 4054 | ObjCLifetimeConversion)) |
| 4055 | return NPV_NullPointer; |
| 4056 | |
| 4057 | // The types didn't match, but we know we got a null pointer; complain, |
| 4058 | // then recover as if the types were correct. |
| 4059 | S.Diag(Arg->getExprLoc(), diag::err_template_arg_wrongtype_null_constant) |
| 4060 | << Arg->getType() << ParamType << Arg->getSourceRange(); |
| 4061 | S.Diag(Param->getLocation(), diag::note_template_param_here); |
| 4062 | return NPV_NullPointer; |
| 4063 | } |
| 4064 | |
| 4065 | // If we don't have a null pointer value, but we do have a NULL pointer |
| 4066 | // constant, suggest a cast to the appropriate type. |
| 4067 | if (Arg->isNullPointerConstant(S.Context, Expr::NPC_NeverValueDependent)) { |
| 4068 | std::string Code = "static_cast<" + ParamType.getAsString() + ">("; |
| 4069 | S.Diag(Arg->getExprLoc(), diag::err_template_arg_untyped_null_constant) |
| 4070 | << ParamType |
| 4071 | << FixItHint::CreateInsertion(Arg->getLocStart(), Code) |
| 4072 | << FixItHint::CreateInsertion(S.PP.getLocForEndOfToken(Arg->getLocEnd()), |
| 4073 | ")"); |
| 4074 | S.Diag(Param->getLocation(), diag::note_template_param_here); |
| 4075 | return NPV_NullPointer; |
| 4076 | } |
| 4077 | |
| 4078 | // FIXME: If we ever want to support general, address-constant expressions |
| 4079 | // as non-type template arguments, we should return the ExprResult here to |
| 4080 | // be interpreted by the caller. |
| 4081 | return NPV_NotNullPointer; |
| 4082 | } |
| 4083 | |
David Majnemer | d1282ec | 2013-08-23 05:39:39 +0000 | [diff] [blame] | 4084 | /// \brief Checks whether the given template argument is compatible with its |
| 4085 | /// template parameter. |
| 4086 | static bool CheckTemplateArgumentIsCompatibleWithParameter( |
| 4087 | Sema &S, NonTypeTemplateParmDecl *Param, QualType ParamType, Expr *ArgIn, |
| 4088 | Expr *Arg, QualType ArgType) { |
| 4089 | bool ObjCLifetimeConversion; |
| 4090 | if (ParamType->isPointerType() && |
| 4091 | !ParamType->getAs<PointerType>()->getPointeeType()->isFunctionType() && |
| 4092 | S.IsQualificationConversion(ArgType, ParamType, false, |
| 4093 | ObjCLifetimeConversion)) { |
| 4094 | // For pointer-to-object types, qualification conversions are |
| 4095 | // permitted. |
| 4096 | } else { |
| 4097 | if (const ReferenceType *ParamRef = ParamType->getAs<ReferenceType>()) { |
| 4098 | if (!ParamRef->getPointeeType()->isFunctionType()) { |
| 4099 | // C++ [temp.arg.nontype]p5b3: |
| 4100 | // For a non-type template-parameter of type reference to |
| 4101 | // object, no conversions apply. The type referred to by the |
| 4102 | // reference may be more cv-qualified than the (otherwise |
| 4103 | // identical) type of the template- argument. The |
| 4104 | // template-parameter is bound directly to the |
| 4105 | // template-argument, which shall be an lvalue. |
| 4106 | |
| 4107 | // FIXME: Other qualifiers? |
| 4108 | unsigned ParamQuals = ParamRef->getPointeeType().getCVRQualifiers(); |
| 4109 | unsigned ArgQuals = ArgType.getCVRQualifiers(); |
| 4110 | |
| 4111 | if ((ParamQuals | ArgQuals) != ParamQuals) { |
| 4112 | S.Diag(Arg->getLocStart(), |
| 4113 | diag::err_template_arg_ref_bind_ignores_quals) |
| 4114 | << ParamType << Arg->getType() << Arg->getSourceRange(); |
| 4115 | S.Diag(Param->getLocation(), diag::note_template_param_here); |
| 4116 | return true; |
| 4117 | } |
| 4118 | } |
| 4119 | } |
| 4120 | |
| 4121 | // At this point, the template argument refers to an object or |
| 4122 | // function with external linkage. We now need to check whether the |
| 4123 | // argument and parameter types are compatible. |
| 4124 | if (!S.Context.hasSameUnqualifiedType(ArgType, |
| 4125 | ParamType.getNonReferenceType())) { |
| 4126 | // We can't perform this conversion or binding. |
| 4127 | if (ParamType->isReferenceType()) |
| 4128 | S.Diag(Arg->getLocStart(), diag::err_template_arg_no_ref_bind) |
| 4129 | << ParamType << ArgIn->getType() << Arg->getSourceRange(); |
| 4130 | else |
| 4131 | S.Diag(Arg->getLocStart(), diag::err_template_arg_not_convertible) |
| 4132 | << ArgIn->getType() << ParamType << Arg->getSourceRange(); |
| 4133 | S.Diag(Param->getLocation(), diag::note_template_param_here); |
| 4134 | return true; |
| 4135 | } |
| 4136 | } |
| 4137 | |
| 4138 | return false; |
| 4139 | } |
| 4140 | |
Douglas Gregor | cc45cb3 | 2009-02-11 19:52:55 +0000 | [diff] [blame] | 4141 | /// \brief Checks whether the given template argument is the address |
| 4142 | /// of an object or function according to C++ [temp.arg.nontype]p1. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4143 | static bool |
Douglas Gregor | b7a0926 | 2010-04-01 18:32:35 +0000 | [diff] [blame] | 4144 | CheckTemplateArgumentAddressOfObjectOrFunction(Sema &S, |
| 4145 | NonTypeTemplateParmDecl *Param, |
| 4146 | QualType ParamType, |
| 4147 | Expr *ArgIn, |
| 4148 | TemplateArgument &Converted) { |
Douglas Gregor | cc45cb3 | 2009-02-11 19:52:55 +0000 | [diff] [blame] | 4149 | bool Invalid = false; |
Douglas Gregor | b7a0926 | 2010-04-01 18:32:35 +0000 | [diff] [blame] | 4150 | Expr *Arg = ArgIn; |
| 4151 | QualType ArgType = Arg->getType(); |
Douglas Gregor | cc45cb3 | 2009-02-11 19:52:55 +0000 | [diff] [blame] | 4152 | |
Douglas Gregor | 4296361 | 2012-04-10 17:08:25 +0000 | [diff] [blame] | 4153 | // If our parameter has pointer type, check for a null template value. |
| 4154 | if (ParamType->isPointerType() || ParamType->isNullPtrType()) { |
| 4155 | switch (isNullPointerValueTemplateArgument(S, Param, ParamType, Arg)) { |
| 4156 | case NPV_NullPointer: |
Richard Smith | 86e6fdc | 2012-04-26 01:51:03 +0000 | [diff] [blame] | 4157 | S.Diag(Arg->getExprLoc(), diag::warn_cxx98_compat_template_arg_null); |
Eli Friedman | d7a6b16 | 2012-09-26 02:36:12 +0000 | [diff] [blame] | 4158 | Converted = TemplateArgument(ParamType, /*isNullPtr*/true); |
Douglas Gregor | 4296361 | 2012-04-10 17:08:25 +0000 | [diff] [blame] | 4159 | return false; |
| 4160 | |
| 4161 | case NPV_Error: |
| 4162 | return true; |
| 4163 | |
| 4164 | case NPV_NotNullPointer: |
| 4165 | break; |
| 4166 | } |
| 4167 | } |
John McCall | 91a5755 | 2011-07-15 05:09:51 +0000 | [diff] [blame] | 4168 | |
Douglas Gregor | b7a0926 | 2010-04-01 18:32:35 +0000 | [diff] [blame] | 4169 | bool AddressTaken = false; |
| 4170 | SourceLocation AddrOpLoc; |
David Majnemer | d1282ec | 2013-08-23 05:39:39 +0000 | [diff] [blame] | 4171 | if (S.getLangOpts().MicrosoftExt) { |
| 4172 | // Microsoft Visual C++ strips all casts, allows an arbitrary number of |
| 4173 | // dereference and address-of operators. |
| 4174 | Arg = Arg->IgnoreParenCasts(); |
| 4175 | |
| 4176 | bool ExtWarnMSTemplateArg = false; |
| 4177 | UnaryOperatorKind FirstOpKind; |
| 4178 | SourceLocation FirstOpLoc; |
| 4179 | while (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(Arg)) { |
| 4180 | UnaryOperatorKind UnOpKind = UnOp->getOpcode(); |
| 4181 | if (UnOpKind == UO_Deref) |
| 4182 | ExtWarnMSTemplateArg = true; |
| 4183 | if (UnOpKind == UO_AddrOf || UnOpKind == UO_Deref) { |
| 4184 | Arg = UnOp->getSubExpr()->IgnoreParenCasts(); |
| 4185 | if (!AddrOpLoc.isValid()) { |
| 4186 | FirstOpKind = UnOpKind; |
| 4187 | FirstOpLoc = UnOp->getOperatorLoc(); |
| 4188 | } |
| 4189 | } else |
| 4190 | break; |
Douglas Gregor | b7a0926 | 2010-04-01 18:32:35 +0000 | [diff] [blame] | 4191 | } |
David Majnemer | d1282ec | 2013-08-23 05:39:39 +0000 | [diff] [blame] | 4192 | if (FirstOpLoc.isValid()) { |
| 4193 | if (ExtWarnMSTemplateArg) |
| 4194 | S.Diag(ArgIn->getLocStart(), diag::ext_ms_deref_template_argument) |
| 4195 | << ArgIn->getSourceRange(); |
John McCall | 91a5755 | 2011-07-15 05:09:51 +0000 | [diff] [blame] | 4196 | |
David Majnemer | d1282ec | 2013-08-23 05:39:39 +0000 | [diff] [blame] | 4197 | if (FirstOpKind == UO_AddrOf) |
| 4198 | AddressTaken = true; |
| 4199 | else if (Arg->getType()->isPointerType()) { |
| 4200 | // We cannot let pointers get dereferenced here, that is obviously not a |
| 4201 | // constant expression. |
| 4202 | assert(FirstOpKind == UO_Deref); |
| 4203 | S.Diag(Arg->getLocStart(), diag::err_template_arg_not_decl_ref) |
| 4204 | << Arg->getSourceRange(); |
| 4205 | } |
| 4206 | } |
| 4207 | } else { |
| 4208 | // See through any implicit casts we added to fix the type. |
| 4209 | Arg = Arg->IgnoreImpCasts(); |
John McCall | 91a5755 | 2011-07-15 05:09:51 +0000 | [diff] [blame] | 4210 | |
David Majnemer | d1282ec | 2013-08-23 05:39:39 +0000 | [diff] [blame] | 4211 | // C++ [temp.arg.nontype]p1: |
| 4212 | // |
| 4213 | // A template-argument for a non-type, non-template |
| 4214 | // template-parameter shall be one of: [...] |
| 4215 | // |
| 4216 | // -- the address of an object or function with external |
| 4217 | // linkage, including function templates and function |
| 4218 | // template-ids but excluding non-static class members, |
| 4219 | // expressed as & id-expression where the & is optional if |
| 4220 | // the name refers to a function or array, or if the |
| 4221 | // corresponding template-parameter is a reference; or |
| 4222 | |
| 4223 | // In C++98/03 mode, give an extension warning on any extra parentheses. |
| 4224 | // See http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#773 |
| 4225 | bool ExtraParens = false; |
| 4226 | while (ParenExpr *Parens = dyn_cast<ParenExpr>(Arg)) { |
| 4227 | if (!Invalid && !ExtraParens) { |
| 4228 | S.Diag(Arg->getLocStart(), |
| 4229 | S.getLangOpts().CPlusPlus11 |
| 4230 | ? diag::warn_cxx98_compat_template_arg_extra_parens |
| 4231 | : diag::ext_template_arg_extra_parens) |
| 4232 | << Arg->getSourceRange(); |
| 4233 | ExtraParens = true; |
| 4234 | } |
| 4235 | |
| 4236 | Arg = Parens->getSubExpr(); |
| 4237 | } |
| 4238 | |
| 4239 | while (SubstNonTypeTemplateParmExpr *subst = |
| 4240 | dyn_cast<SubstNonTypeTemplateParmExpr>(Arg)) |
| 4241 | Arg = subst->getReplacement()->IgnoreImpCasts(); |
| 4242 | |
| 4243 | if (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(Arg)) { |
| 4244 | if (UnOp->getOpcode() == UO_AddrOf) { |
| 4245 | Arg = UnOp->getSubExpr(); |
| 4246 | AddressTaken = true; |
| 4247 | AddrOpLoc = UnOp->getOperatorLoc(); |
| 4248 | } |
| 4249 | } |
| 4250 | |
| 4251 | while (SubstNonTypeTemplateParmExpr *subst = |
| 4252 | dyn_cast<SubstNonTypeTemplateParmExpr>(Arg)) |
| 4253 | Arg = subst->getReplacement()->IgnoreImpCasts(); |
| 4254 | } |
John McCall | 91a5755 | 2011-07-15 05:09:51 +0000 | [diff] [blame] | 4255 | |
Chandler Carruth | 038cc39 | 2010-01-31 10:01:20 +0000 | [diff] [blame] | 4256 | // Stop checking the precise nature of the argument if it is value dependent, |
| 4257 | // it should be checked when instantiated. |
Douglas Gregor | b7a0926 | 2010-04-01 18:32:35 +0000 | [diff] [blame] | 4258 | if (Arg->isValueDependent()) { |
John McCall | 3fa5cae | 2010-10-26 07:05:15 +0000 | [diff] [blame] | 4259 | Converted = TemplateArgument(ArgIn); |
Chandler Carruth | 038cc39 | 2010-01-31 10:01:20 +0000 | [diff] [blame] | 4260 | return false; |
Douglas Gregor | b7a0926 | 2010-04-01 18:32:35 +0000 | [diff] [blame] | 4261 | } |
David Majnemer | d1282ec | 2013-08-23 05:39:39 +0000 | [diff] [blame] | 4262 | |
| 4263 | if (isa<CXXUuidofExpr>(Arg)) { |
| 4264 | if (CheckTemplateArgumentIsCompatibleWithParameter(S, Param, ParamType, |
| 4265 | ArgIn, Arg, ArgType)) |
| 4266 | return true; |
| 4267 | |
| 4268 | Converted = TemplateArgument(ArgIn); |
| 4269 | return false; |
| 4270 | } |
| 4271 | |
Douglas Gregor | d2008e2 | 2012-04-06 22:40:38 +0000 | [diff] [blame] | 4272 | DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Arg); |
| 4273 | if (!DRE) { |
| 4274 | S.Diag(Arg->getLocStart(), diag::err_template_arg_not_decl_ref) |
| 4275 | << Arg->getSourceRange(); |
| 4276 | S.Diag(Param->getLocation(), diag::note_template_param_here); |
| 4277 | return true; |
| 4278 | } |
Chandler Carruth | 038cc39 | 2010-01-31 10:01:20 +0000 | [diff] [blame] | 4279 | |
Eli Friedman | d7a6b16 | 2012-09-26 02:36:12 +0000 | [diff] [blame] | 4280 | ValueDecl *Entity = DRE->getDecl(); |
Douglas Gregor | cc45cb3 | 2009-02-11 19:52:55 +0000 | [diff] [blame] | 4281 | |
| 4282 | // Cannot refer to non-static data members |
Richard Smith | b4051e7 | 2012-04-04 21:11:30 +0000 | [diff] [blame] | 4283 | if (FieldDecl *Field = dyn_cast<FieldDecl>(Entity)) { |
Daniel Dunbar | 96a0014 | 2012-03-09 18:35:03 +0000 | [diff] [blame] | 4284 | S.Diag(Arg->getLocStart(), diag::err_template_arg_field) |
Douglas Gregor | cc45cb3 | 2009-02-11 19:52:55 +0000 | [diff] [blame] | 4285 | << Field << Arg->getSourceRange(); |
Douglas Gregor | b7a0926 | 2010-04-01 18:32:35 +0000 | [diff] [blame] | 4286 | S.Diag(Param->getLocation(), diag::note_template_param_here); |
| 4287 | return true; |
| 4288 | } |
Douglas Gregor | cc45cb3 | 2009-02-11 19:52:55 +0000 | [diff] [blame] | 4289 | |
| 4290 | // Cannot refer to non-static member functions |
Richard Smith | b4051e7 | 2012-04-04 21:11:30 +0000 | [diff] [blame] | 4291 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(Entity)) { |
Douglas Gregor | b7a0926 | 2010-04-01 18:32:35 +0000 | [diff] [blame] | 4292 | if (!Method->isStatic()) { |
Daniel Dunbar | 96a0014 | 2012-03-09 18:35:03 +0000 | [diff] [blame] | 4293 | S.Diag(Arg->getLocStart(), diag::err_template_arg_method) |
Douglas Gregor | cc45cb3 | 2009-02-11 19:52:55 +0000 | [diff] [blame] | 4294 | << Method << Arg->getSourceRange(); |
Douglas Gregor | b7a0926 | 2010-04-01 18:32:35 +0000 | [diff] [blame] | 4295 | S.Diag(Param->getLocation(), diag::note_template_param_here); |
| 4296 | return true; |
| 4297 | } |
Richard Smith | b4051e7 | 2012-04-04 21:11:30 +0000 | [diff] [blame] | 4298 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4299 | |
Richard Smith | b4051e7 | 2012-04-04 21:11:30 +0000 | [diff] [blame] | 4300 | FunctionDecl *Func = dyn_cast<FunctionDecl>(Entity); |
| 4301 | VarDecl *Var = dyn_cast<VarDecl>(Entity); |
Douglas Gregor | cc45cb3 | 2009-02-11 19:52:55 +0000 | [diff] [blame] | 4302 | |
Richard Smith | b4051e7 | 2012-04-04 21:11:30 +0000 | [diff] [blame] | 4303 | // A non-type template argument must refer to an object or function. |
| 4304 | if (!Func && !Var) { |
| 4305 | // We found something, but we don't know specifically what it is. |
| 4306 | S.Diag(Arg->getLocStart(), diag::err_template_arg_not_object_or_func) |
| 4307 | << Arg->getSourceRange(); |
| 4308 | S.Diag(DRE->getDecl()->getLocation(), diag::note_template_arg_refers_here); |
| 4309 | return true; |
| 4310 | } |
Douglas Gregor | cc45cb3 | 2009-02-11 19:52:55 +0000 | [diff] [blame] | 4311 | |
Richard Smith | b4051e7 | 2012-04-04 21:11:30 +0000 | [diff] [blame] | 4312 | // Address / reference template args must have external linkage in C++98. |
Rafael Espindola | 181e3ec | 2013-05-13 00:12:11 +0000 | [diff] [blame] | 4313 | if (Entity->getFormalLinkage() == InternalLinkage) { |
Richard Smith | 80ad52f | 2013-01-02 11:42:31 +0000 | [diff] [blame] | 4314 | S.Diag(Arg->getLocStart(), S.getLangOpts().CPlusPlus11 ? |
Richard Smith | b4051e7 | 2012-04-04 21:11:30 +0000 | [diff] [blame] | 4315 | diag::warn_cxx98_compat_template_arg_object_internal : |
| 4316 | diag::ext_template_arg_object_internal) |
| 4317 | << !Func << Entity << Arg->getSourceRange(); |
| 4318 | S.Diag(Entity->getLocation(), diag::note_template_arg_internal_object) |
| 4319 | << !Func; |
Rafael Espindola | 181e3ec | 2013-05-13 00:12:11 +0000 | [diff] [blame] | 4320 | } else if (!Entity->hasLinkage()) { |
Richard Smith | b4051e7 | 2012-04-04 21:11:30 +0000 | [diff] [blame] | 4321 | S.Diag(Arg->getLocStart(), diag::err_template_arg_object_no_linkage) |
| 4322 | << !Func << Entity << Arg->getSourceRange(); |
| 4323 | S.Diag(Entity->getLocation(), diag::note_template_arg_internal_object) |
| 4324 | << !Func; |
| 4325 | return true; |
| 4326 | } |
| 4327 | |
| 4328 | if (Func) { |
Douglas Gregor | b7a0926 | 2010-04-01 18:32:35 +0000 | [diff] [blame] | 4329 | // If the template parameter has pointer type, the function decays. |
| 4330 | if (ParamType->isPointerType() && !AddressTaken) |
| 4331 | ArgType = S.Context.getPointerType(Func->getType()); |
| 4332 | else if (AddressTaken && ParamType->isReferenceType()) { |
| 4333 | // If we originally had an address-of operator, but the |
| 4334 | // parameter has reference type, complain and (if things look |
| 4335 | // like they will work) drop the address-of operator. |
| 4336 | if (!S.Context.hasSameUnqualifiedType(Func->getType(), |
| 4337 | ParamType.getNonReferenceType())) { |
| 4338 | S.Diag(AddrOpLoc, diag::err_template_arg_address_of_non_pointer) |
| 4339 | << ParamType; |
| 4340 | S.Diag(Param->getLocation(), diag::note_template_param_here); |
| 4341 | return true; |
| 4342 | } |
| 4343 | |
| 4344 | S.Diag(AddrOpLoc, diag::err_template_arg_address_of_non_pointer) |
| 4345 | << ParamType |
| 4346 | << FixItHint::CreateRemoval(AddrOpLoc); |
| 4347 | S.Diag(Param->getLocation(), diag::note_template_param_here); |
| 4348 | |
| 4349 | ArgType = Func->getType(); |
| 4350 | } |
Richard Smith | b4051e7 | 2012-04-04 21:11:30 +0000 | [diff] [blame] | 4351 | } else { |
Douglas Gregor | b7a0926 | 2010-04-01 18:32:35 +0000 | [diff] [blame] | 4352 | // A value of reference type is not an object. |
| 4353 | if (Var->getType()->isReferenceType()) { |
Daniel Dunbar | 96a0014 | 2012-03-09 18:35:03 +0000 | [diff] [blame] | 4354 | S.Diag(Arg->getLocStart(), |
Douglas Gregor | b7a0926 | 2010-04-01 18:32:35 +0000 | [diff] [blame] | 4355 | diag::err_template_arg_reference_var) |
| 4356 | << Var->getType() << Arg->getSourceRange(); |
| 4357 | S.Diag(Param->getLocation(), diag::note_template_param_here); |
| 4358 | return true; |
| 4359 | } |
| 4360 | |
Richard Smith | b4051e7 | 2012-04-04 21:11:30 +0000 | [diff] [blame] | 4361 | // A template argument must have static storage duration. |
Richard Smith | 38afbc7 | 2013-04-13 02:43:54 +0000 | [diff] [blame] | 4362 | if (Var->getTLSKind()) { |
Richard Smith | b4051e7 | 2012-04-04 21:11:30 +0000 | [diff] [blame] | 4363 | S.Diag(Arg->getLocStart(), diag::err_template_arg_thread_local) |
| 4364 | << Arg->getSourceRange(); |
| 4365 | S.Diag(Var->getLocation(), diag::note_template_arg_refers_here); |
| 4366 | return true; |
| 4367 | } |
Douglas Gregor | b7a0926 | 2010-04-01 18:32:35 +0000 | [diff] [blame] | 4368 | |
| 4369 | // If the template parameter has pointer type, we must have taken |
| 4370 | // the address of this object. |
| 4371 | if (ParamType->isReferenceType()) { |
| 4372 | if (AddressTaken) { |
| 4373 | // If we originally had an address-of operator, but the |
| 4374 | // parameter has reference type, complain and (if things look |
| 4375 | // like they will work) drop the address-of operator. |
| 4376 | if (!S.Context.hasSameUnqualifiedType(Var->getType(), |
| 4377 | ParamType.getNonReferenceType())) { |
| 4378 | S.Diag(AddrOpLoc, diag::err_template_arg_address_of_non_pointer) |
| 4379 | << ParamType; |
| 4380 | S.Diag(Param->getLocation(), diag::note_template_param_here); |
| 4381 | return true; |
| 4382 | } |
| 4383 | |
| 4384 | S.Diag(AddrOpLoc, diag::err_template_arg_address_of_non_pointer) |
| 4385 | << ParamType |
| 4386 | << FixItHint::CreateRemoval(AddrOpLoc); |
| 4387 | S.Diag(Param->getLocation(), diag::note_template_param_here); |
| 4388 | |
| 4389 | ArgType = Var->getType(); |
| 4390 | } |
| 4391 | } else if (!AddressTaken && ParamType->isPointerType()) { |
| 4392 | if (Var->getType()->isArrayType()) { |
| 4393 | // Array-to-pointer decay. |
| 4394 | ArgType = S.Context.getArrayDecayedType(Var->getType()); |
| 4395 | } else { |
| 4396 | // If the template parameter has pointer type but the address of |
| 4397 | // this object was not taken, complain and (possibly) recover by |
| 4398 | // taking the address of the entity. |
| 4399 | ArgType = S.Context.getPointerType(Var->getType()); |
| 4400 | if (!S.Context.hasSameUnqualifiedType(ArgType, ParamType)) { |
| 4401 | S.Diag(Arg->getLocStart(), diag::err_template_arg_not_address_of) |
| 4402 | << ParamType; |
| 4403 | S.Diag(Param->getLocation(), diag::note_template_param_here); |
| 4404 | return true; |
| 4405 | } |
| 4406 | |
| 4407 | S.Diag(Arg->getLocStart(), diag::err_template_arg_not_address_of) |
| 4408 | << ParamType |
| 4409 | << FixItHint::CreateInsertion(Arg->getLocStart(), "&"); |
| 4410 | |
| 4411 | S.Diag(Param->getLocation(), diag::note_template_param_here); |
| 4412 | } |
| 4413 | } |
Douglas Gregor | cc45cb3 | 2009-02-11 19:52:55 +0000 | [diff] [blame] | 4414 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4415 | |
David Majnemer | d1282ec | 2013-08-23 05:39:39 +0000 | [diff] [blame] | 4416 | if (CheckTemplateArgumentIsCompatibleWithParameter(S, Param, ParamType, ArgIn, |
| 4417 | Arg, ArgType)) |
| 4418 | return true; |
Douglas Gregor | b7a0926 | 2010-04-01 18:32:35 +0000 | [diff] [blame] | 4419 | |
| 4420 | // Create the template argument. |
Eli Friedman | d7a6b16 | 2012-09-26 02:36:12 +0000 | [diff] [blame] | 4421 | Converted = TemplateArgument(cast<ValueDecl>(Entity->getCanonicalDecl()), |
| 4422 | ParamType->isReferenceType()); |
Nick Lewycky | b7e5eec | 2013-02-02 00:25:55 +0000 | [diff] [blame] | 4423 | S.MarkAnyDeclReferenced(Arg->getLocStart(), Entity, false); |
Douglas Gregor | b7a0926 | 2010-04-01 18:32:35 +0000 | [diff] [blame] | 4424 | return false; |
Douglas Gregor | cc45cb3 | 2009-02-11 19:52:55 +0000 | [diff] [blame] | 4425 | } |
| 4426 | |
| 4427 | /// \brief Checks whether the given template argument is a pointer to |
| 4428 | /// member constant according to C++ [temp.arg.nontype]p1. |
Douglas Gregor | 4296361 | 2012-04-10 17:08:25 +0000 | [diff] [blame] | 4429 | static bool CheckTemplateArgumentPointerToMember(Sema &S, |
| 4430 | NonTypeTemplateParmDecl *Param, |
| 4431 | QualType ParamType, |
| 4432 | Expr *&ResultArg, |
| 4433 | TemplateArgument &Converted) { |
Douglas Gregor | cc45cb3 | 2009-02-11 19:52:55 +0000 | [diff] [blame] | 4434 | bool Invalid = false; |
| 4435 | |
Douglas Gregor | 4296361 | 2012-04-10 17:08:25 +0000 | [diff] [blame] | 4436 | // Check for a null pointer value. |
| 4437 | Expr *Arg = ResultArg; |
| 4438 | switch (isNullPointerValueTemplateArgument(S, Param, ParamType, Arg)) { |
| 4439 | case NPV_Error: |
| 4440 | return true; |
| 4441 | case NPV_NullPointer: |
Richard Smith | 86e6fdc | 2012-04-26 01:51:03 +0000 | [diff] [blame] | 4442 | S.Diag(Arg->getExprLoc(), diag::warn_cxx98_compat_template_arg_null); |
Eli Friedman | d7a6b16 | 2012-09-26 02:36:12 +0000 | [diff] [blame] | 4443 | Converted = TemplateArgument(ParamType, /*isNullPtr*/true); |
Douglas Gregor | 4296361 | 2012-04-10 17:08:25 +0000 | [diff] [blame] | 4444 | return false; |
| 4445 | case NPV_NotNullPointer: |
| 4446 | break; |
| 4447 | } |
| 4448 | |
| 4449 | bool ObjCLifetimeConversion; |
| 4450 | if (S.IsQualificationConversion(Arg->getType(), |
| 4451 | ParamType.getNonReferenceType(), |
| 4452 | false, ObjCLifetimeConversion)) { |
| 4453 | Arg = S.ImpCastExprToType(Arg, ParamType, CK_NoOp, |
| 4454 | Arg->getValueKind()).take(); |
| 4455 | ResultArg = Arg; |
| 4456 | } else if (!S.Context.hasSameUnqualifiedType(Arg->getType(), |
| 4457 | ParamType.getNonReferenceType())) { |
| 4458 | // We can't perform this conversion. |
| 4459 | S.Diag(Arg->getLocStart(), diag::err_template_arg_not_convertible) |
| 4460 | << Arg->getType() << ParamType << Arg->getSourceRange(); |
| 4461 | S.Diag(Param->getLocation(), diag::note_template_param_here); |
| 4462 | return true; |
| 4463 | } |
| 4464 | |
Douglas Gregor | cc45cb3 | 2009-02-11 19:52:55 +0000 | [diff] [blame] | 4465 | // See through any implicit casts we added to fix the type. |
Eli Friedman | 73c39ab | 2009-10-20 08:27:19 +0000 | [diff] [blame] | 4466 | while (ImplicitCastExpr *Cast = dyn_cast<ImplicitCastExpr>(Arg)) |
Douglas Gregor | cc45cb3 | 2009-02-11 19:52:55 +0000 | [diff] [blame] | 4467 | Arg = Cast->getSubExpr(); |
| 4468 | |
| 4469 | // C++ [temp.arg.nontype]p1: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4470 | // |
Douglas Gregor | cc45cb3 | 2009-02-11 19:52:55 +0000 | [diff] [blame] | 4471 | // A template-argument for a non-type, non-template |
| 4472 | // template-parameter shall be one of: [...] |
| 4473 | // |
| 4474 | // -- a pointer to member expressed as described in 5.3.1. |
Douglas Gregor | a2813ce | 2009-10-23 18:54:35 +0000 | [diff] [blame] | 4475 | DeclRefExpr *DRE = 0; |
Douglas Gregor | cc45cb3 | 2009-02-11 19:52:55 +0000 | [diff] [blame] | 4476 | |
Abramo Bagnara | 2c5399f | 2010-09-13 06:06:58 +0000 | [diff] [blame] | 4477 | // In C++98/03 mode, give an extension warning on any extra parentheses. |
| 4478 | // See http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#773 |
| 4479 | bool ExtraParens = false; |
Douglas Gregor | cc45cb3 | 2009-02-11 19:52:55 +0000 | [diff] [blame] | 4480 | while (ParenExpr *Parens = dyn_cast<ParenExpr>(Arg)) { |
Richard Smith | ebaf0e6 | 2011-10-18 20:49:44 +0000 | [diff] [blame] | 4481 | if (!Invalid && !ExtraParens) { |
Douglas Gregor | 4296361 | 2012-04-10 17:08:25 +0000 | [diff] [blame] | 4482 | S.Diag(Arg->getLocStart(), |
Richard Smith | 80ad52f | 2013-01-02 11:42:31 +0000 | [diff] [blame] | 4483 | S.getLangOpts().CPlusPlus11 ? |
Douglas Gregor | 4296361 | 2012-04-10 17:08:25 +0000 | [diff] [blame] | 4484 | diag::warn_cxx98_compat_template_arg_extra_parens : |
| 4485 | diag::ext_template_arg_extra_parens) |
Douglas Gregor | cc45cb3 | 2009-02-11 19:52:55 +0000 | [diff] [blame] | 4486 | << Arg->getSourceRange(); |
Abramo Bagnara | 2c5399f | 2010-09-13 06:06:58 +0000 | [diff] [blame] | 4487 | ExtraParens = true; |
Douglas Gregor | cc45cb3 | 2009-02-11 19:52:55 +0000 | [diff] [blame] | 4488 | } |
| 4489 | |
| 4490 | Arg = Parens->getSubExpr(); |
| 4491 | } |
| 4492 | |
John McCall | 91a5755 | 2011-07-15 05:09:51 +0000 | [diff] [blame] | 4493 | while (SubstNonTypeTemplateParmExpr *subst = |
| 4494 | dyn_cast<SubstNonTypeTemplateParmExpr>(Arg)) |
| 4495 | Arg = subst->getReplacement()->IgnoreImpCasts(); |
| 4496 | |
Douglas Gregor | caddba0 | 2009-11-12 18:38:13 +0000 | [diff] [blame] | 4497 | // A pointer-to-member constant written &Class::member. |
| 4498 | if (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(Arg)) { |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 4499 | if (UnOp->getOpcode() == UO_AddrOf) { |
Douglas Gregor | a2813ce | 2009-10-23 18:54:35 +0000 | [diff] [blame] | 4500 | DRE = dyn_cast<DeclRefExpr>(UnOp->getSubExpr()); |
| 4501 | if (DRE && !DRE->getQualifier()) |
| 4502 | DRE = 0; |
| 4503 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4504 | } |
Douglas Gregor | caddba0 | 2009-11-12 18:38:13 +0000 | [diff] [blame] | 4505 | // A constant of pointer-to-member type. |
| 4506 | else if ((DRE = dyn_cast<DeclRefExpr>(Arg))) { |
| 4507 | if (ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) { |
| 4508 | if (VD->getType()->isMemberPointerType()) { |
| 4509 | if (isa<NonTypeTemplateParmDecl>(VD) || |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4510 | (isa<VarDecl>(VD) && |
Douglas Gregor | 4296361 | 2012-04-10 17:08:25 +0000 | [diff] [blame] | 4511 | S.Context.getCanonicalType(VD->getType()).isConstQualified())) { |
Eli Friedman | d7a6b16 | 2012-09-26 02:36:12 +0000 | [diff] [blame] | 4512 | if (Arg->isTypeDependent() || Arg->isValueDependent()) { |
John McCall | 3fa5cae | 2010-10-26 07:05:15 +0000 | [diff] [blame] | 4513 | Converted = TemplateArgument(Arg); |
Eli Friedman | d7a6b16 | 2012-09-26 02:36:12 +0000 | [diff] [blame] | 4514 | } else { |
| 4515 | VD = cast<ValueDecl>(VD->getCanonicalDecl()); |
| 4516 | Converted = TemplateArgument(VD, /*isReferenceParam*/false); |
| 4517 | } |
Douglas Gregor | caddba0 | 2009-11-12 18:38:13 +0000 | [diff] [blame] | 4518 | return Invalid; |
| 4519 | } |
| 4520 | } |
| 4521 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4522 | |
Douglas Gregor | caddba0 | 2009-11-12 18:38:13 +0000 | [diff] [blame] | 4523 | DRE = 0; |
| 4524 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4525 | |
Douglas Gregor | cc45cb3 | 2009-02-11 19:52:55 +0000 | [diff] [blame] | 4526 | if (!DRE) |
Douglas Gregor | 4296361 | 2012-04-10 17:08:25 +0000 | [diff] [blame] | 4527 | return S.Diag(Arg->getLocStart(), |
| 4528 | diag::err_template_arg_not_pointer_to_member_form) |
Douglas Gregor | cc45cb3 | 2009-02-11 19:52:55 +0000 | [diff] [blame] | 4529 | << Arg->getSourceRange(); |
| 4530 | |
| 4531 | if (isa<FieldDecl>(DRE->getDecl()) || isa<CXXMethodDecl>(DRE->getDecl())) { |
| 4532 | assert((isa<FieldDecl>(DRE->getDecl()) || |
| 4533 | !cast<CXXMethodDecl>(DRE->getDecl())->isStatic()) && |
| 4534 | "Only non-static member pointers can make it here"); |
| 4535 | |
| 4536 | // Okay: this is the address of a non-static member, and therefore |
| 4537 | // a member pointer constant. |
Eli Friedman | d7a6b16 | 2012-09-26 02:36:12 +0000 | [diff] [blame] | 4538 | if (Arg->isTypeDependent() || Arg->isValueDependent()) { |
John McCall | 3fa5cae | 2010-10-26 07:05:15 +0000 | [diff] [blame] | 4539 | Converted = TemplateArgument(Arg); |
Eli Friedman | d7a6b16 | 2012-09-26 02:36:12 +0000 | [diff] [blame] | 4540 | } else { |
| 4541 | ValueDecl *D = cast<ValueDecl>(DRE->getDecl()->getCanonicalDecl()); |
| 4542 | Converted = TemplateArgument(D, /*isReferenceParam*/false); |
| 4543 | } |
Douglas Gregor | cc45cb3 | 2009-02-11 19:52:55 +0000 | [diff] [blame] | 4544 | return Invalid; |
| 4545 | } |
| 4546 | |
| 4547 | // We found something else, but we don't know specifically what it is. |
Douglas Gregor | 4296361 | 2012-04-10 17:08:25 +0000 | [diff] [blame] | 4548 | S.Diag(Arg->getLocStart(), |
| 4549 | diag::err_template_arg_not_pointer_to_member_form) |
| 4550 | << Arg->getSourceRange(); |
| 4551 | S.Diag(DRE->getDecl()->getLocation(), diag::note_template_arg_refers_here); |
Douglas Gregor | cc45cb3 | 2009-02-11 19:52:55 +0000 | [diff] [blame] | 4552 | return true; |
| 4553 | } |
| 4554 | |
Douglas Gregor | c15cb38 | 2009-02-09 23:23:08 +0000 | [diff] [blame] | 4555 | /// \brief Check a template argument against its corresponding |
| 4556 | /// non-type template parameter. |
| 4557 | /// |
Douglas Gregor | 2943aed | 2009-03-03 04:44:36 +0000 | [diff] [blame] | 4558 | /// This routine implements the semantics of C++ [temp.arg.nontype]. |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4559 | /// If an error occurred, it returns ExprError(); otherwise, it |
| 4560 | /// returns the converted template argument. \p |
Douglas Gregor | 2943aed | 2009-03-03 04:44:36 +0000 | [diff] [blame] | 4561 | /// InstantiatedParamType is the type of the non-type template |
| 4562 | /// parameter after it has been instantiated. |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4563 | ExprResult Sema::CheckTemplateArgument(NonTypeTemplateParmDecl *Param, |
| 4564 | QualType InstantiatedParamType, Expr *Arg, |
| 4565 | TemplateArgument &Converted, |
| 4566 | CheckTemplateArgumentKind CTAK) { |
Daniel Dunbar | 96a0014 | 2012-03-09 18:35:03 +0000 | [diff] [blame] | 4567 | SourceLocation StartLoc = Arg->getLocStart(); |
Douglas Gregor | 40808ce | 2009-03-09 23:48:35 +0000 | [diff] [blame] | 4568 | |
Douglas Gregor | 6ae5e66 | 2009-02-10 23:36:10 +0000 | [diff] [blame] | 4569 | // If either the parameter has a dependent type or the argument is |
| 4570 | // type-dependent, there's nothing we can check now. |
Douglas Gregor | 40808ce | 2009-03-09 23:48:35 +0000 | [diff] [blame] | 4571 | if (InstantiatedParamType->isDependentType() || Arg->isTypeDependent()) { |
| 4572 | // FIXME: Produce a cloned, canonical expression? |
Douglas Gregor | 02cbbd2 | 2009-06-11 18:10:32 +0000 | [diff] [blame] | 4573 | Converted = TemplateArgument(Arg); |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4574 | return Owned(Arg); |
Douglas Gregor | 40808ce | 2009-03-09 23:48:35 +0000 | [diff] [blame] | 4575 | } |
Douglas Gregor | 6ae5e66 | 2009-02-10 23:36:10 +0000 | [diff] [blame] | 4576 | |
| 4577 | // C++ [temp.arg.nontype]p5: |
| 4578 | // The following conversions are performed on each expression used |
| 4579 | // as a non-type template-argument. If a non-type |
| 4580 | // template-argument cannot be converted to the type of the |
| 4581 | // corresponding template-parameter then the program is |
| 4582 | // ill-formed. |
Douglas Gregor | 2943aed | 2009-03-03 04:44:36 +0000 | [diff] [blame] | 4583 | QualType ParamType = InstantiatedParamType; |
Douglas Gregor | 2ade35e | 2010-06-16 00:17:44 +0000 | [diff] [blame] | 4584 | if (ParamType->isIntegralOrEnumerationType()) { |
Richard Smith | 8ef7b20 | 2012-01-18 23:55:52 +0000 | [diff] [blame] | 4585 | // C++11: |
| 4586 | // -- for a non-type template-parameter of integral or |
| 4587 | // enumeration type, conversions permitted in a converted |
| 4588 | // constant expression are applied. |
| 4589 | // |
| 4590 | // C++98: |
| 4591 | // -- for a non-type template-parameter of integral or |
| 4592 | // enumeration type, integral promotions (4.5) and integral |
| 4593 | // conversions (4.7) are applied. |
| 4594 | |
| 4595 | if (CTAK == CTAK_Deduced && |
| 4596 | !Context.hasSameUnqualifiedType(ParamType, Arg->getType())) { |
| 4597 | // C++ [temp.deduct.type]p17: |
| 4598 | // If, in the declaration of a function template with a non-type |
| 4599 | // template-parameter, the non-type template-parameter is used |
| 4600 | // in an expression in the function parameter-list and, if the |
| 4601 | // corresponding template-argument is deduced, the |
| 4602 | // template-argument type shall match the type of the |
| 4603 | // template-parameter exactly, except that a template-argument |
| 4604 | // deduced from an array bound may be of any integral type. |
| 4605 | Diag(StartLoc, diag::err_deduced_non_type_template_arg_type_mismatch) |
| 4606 | << Arg->getType().getUnqualifiedType() |
| 4607 | << ParamType.getUnqualifiedType(); |
| 4608 | Diag(Param->getLocation(), diag::note_template_param_here); |
| 4609 | return ExprError(); |
| 4610 | } |
| 4611 | |
Richard Smith | 80ad52f | 2013-01-02 11:42:31 +0000 | [diff] [blame] | 4612 | if (getLangOpts().CPlusPlus11) { |
Richard Smith | 8ef7b20 | 2012-01-18 23:55:52 +0000 | [diff] [blame] | 4613 | // We can't check arbitrary value-dependent arguments. |
| 4614 | // FIXME: If there's no viable conversion to the template parameter type, |
| 4615 | // we should be able to diagnose that prior to instantiation. |
| 4616 | if (Arg->isValueDependent()) { |
| 4617 | Converted = TemplateArgument(Arg); |
| 4618 | return Owned(Arg); |
| 4619 | } |
| 4620 | |
| 4621 | // C++ [temp.arg.nontype]p1: |
| 4622 | // A template-argument for a non-type, non-template template-parameter |
| 4623 | // shall be one of: |
| 4624 | // |
| 4625 | // -- for a non-type template-parameter of integral or enumeration |
| 4626 | // type, a converted constant expression of the type of the |
| 4627 | // template-parameter; or |
| 4628 | llvm::APSInt Value; |
| 4629 | ExprResult ArgResult = |
| 4630 | CheckConvertedConstantExpression(Arg, ParamType, Value, |
| 4631 | CCEK_TemplateArg); |
| 4632 | if (ArgResult.isInvalid()) |
| 4633 | return ExprError(); |
| 4634 | |
| 4635 | // Widen the argument value to sizeof(parameter type). This is almost |
| 4636 | // always a no-op, except when the parameter type is bool. In |
| 4637 | // that case, this may extend the argument from 1 bit to 8 bits. |
| 4638 | QualType IntegerType = ParamType; |
| 4639 | if (const EnumType *Enum = IntegerType->getAs<EnumType>()) |
| 4640 | IntegerType = Enum->getDecl()->getIntegerType(); |
| 4641 | Value = Value.extOrTrunc(Context.getTypeSize(IntegerType)); |
| 4642 | |
Benjamin Kramer | 8552437 | 2012-06-07 15:09:51 +0000 | [diff] [blame] | 4643 | Converted = TemplateArgument(Context, Value, |
| 4644 | Context.getCanonicalType(ParamType)); |
Richard Smith | 8ef7b20 | 2012-01-18 23:55:52 +0000 | [diff] [blame] | 4645 | return ArgResult; |
| 4646 | } |
| 4647 | |
Richard Smith | 4f87062 | 2011-10-27 22:11:44 +0000 | [diff] [blame] | 4648 | ExprResult ArgResult = DefaultLvalueConversion(Arg); |
| 4649 | if (ArgResult.isInvalid()) |
| 4650 | return ExprError(); |
| 4651 | Arg = ArgResult.take(); |
| 4652 | |
| 4653 | QualType ArgType = Arg->getType(); |
| 4654 | |
Douglas Gregor | 6ae5e66 | 2009-02-10 23:36:10 +0000 | [diff] [blame] | 4655 | // C++ [temp.arg.nontype]p1: |
| 4656 | // A template-argument for a non-type, non-template |
| 4657 | // template-parameter shall be one of: |
| 4658 | // |
| 4659 | // -- an integral constant-expression of integral or enumeration |
| 4660 | // type; or |
| 4661 | // -- the name of a non-type template-parameter; or |
| 4662 | SourceLocation NonConstantLoc; |
Douglas Gregor | 3e00bad | 2009-02-17 01:05:43 +0000 | [diff] [blame] | 4663 | llvm::APSInt Value; |
Douglas Gregor | 2ade35e | 2010-06-16 00:17:44 +0000 | [diff] [blame] | 4664 | if (!ArgType->isIntegralOrEnumerationType()) { |
Daniel Dunbar | 96a0014 | 2012-03-09 18:35:03 +0000 | [diff] [blame] | 4665 | Diag(Arg->getLocStart(), |
Douglas Gregor | 6ae5e66 | 2009-02-10 23:36:10 +0000 | [diff] [blame] | 4666 | diag::err_template_arg_not_integral_or_enumeral) |
| 4667 | << ArgType << Arg->getSourceRange(); |
| 4668 | Diag(Param->getLocation(), diag::note_template_param_here); |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4669 | return ExprError(); |
Richard Smith | 282e7e6 | 2012-02-04 09:53:13 +0000 | [diff] [blame] | 4670 | } else if (!Arg->isValueDependent()) { |
Douglas Gregor | ab41fe9 | 2012-05-04 22:38:52 +0000 | [diff] [blame] | 4671 | class TmplArgICEDiagnoser : public VerifyICEDiagnoser { |
| 4672 | QualType T; |
| 4673 | |
| 4674 | public: |
| 4675 | TmplArgICEDiagnoser(QualType T) : T(T) { } |
| 4676 | |
| 4677 | virtual void diagnoseNotICE(Sema &S, SourceLocation Loc, |
| 4678 | SourceRange SR) { |
| 4679 | S.Diag(Loc, diag::err_template_arg_not_ice) << T << SR; |
| 4680 | } |
| 4681 | } Diagnoser(ArgType); |
| 4682 | |
| 4683 | Arg = VerifyIntegerConstantExpression(Arg, &Value, Diagnoser, |
| 4684 | false).take(); |
Richard Smith | 282e7e6 | 2012-02-04 09:53:13 +0000 | [diff] [blame] | 4685 | if (!Arg) |
| 4686 | return ExprError(); |
Douglas Gregor | 6ae5e66 | 2009-02-10 23:36:10 +0000 | [diff] [blame] | 4687 | } |
| 4688 | |
Douglas Gregor | 02024a9 | 2010-03-28 02:42:43 +0000 | [diff] [blame] | 4689 | // From here on out, all we care about are the unqualified forms |
| 4690 | // of the parameter and argument types. |
| 4691 | ParamType = ParamType.getUnqualifiedType(); |
| 4692 | ArgType = ArgType.getUnqualifiedType(); |
Douglas Gregor | 6ae5e66 | 2009-02-10 23:36:10 +0000 | [diff] [blame] | 4693 | |
| 4694 | // Try to convert the argument to the parameter's type. |
Douglas Gregor | ff52439 | 2009-11-04 21:50:46 +0000 | [diff] [blame] | 4695 | if (Context.hasSameType(ParamType, ArgType)) { |
Douglas Gregor | 6ae5e66 | 2009-02-10 23:36:10 +0000 | [diff] [blame] | 4696 | // Okay: no conversion necessary |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 4697 | } else if (ParamType->isBooleanType()) { |
| 4698 | // This is an integral-to-boolean conversion. |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4699 | Arg = ImpCastExprToType(Arg, ParamType, CK_IntegralToBoolean).take(); |
Douglas Gregor | 6ae5e66 | 2009-02-10 23:36:10 +0000 | [diff] [blame] | 4700 | } else if (IsIntegralPromotion(Arg, ArgType, ParamType) || |
| 4701 | !ParamType->isEnumeralType()) { |
| 4702 | // This is an integral promotion or conversion. |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4703 | Arg = ImpCastExprToType(Arg, ParamType, CK_IntegralCast).take(); |
Douglas Gregor | 6ae5e66 | 2009-02-10 23:36:10 +0000 | [diff] [blame] | 4704 | } else { |
| 4705 | // We can't perform this conversion. |
Daniel Dunbar | 96a0014 | 2012-03-09 18:35:03 +0000 | [diff] [blame] | 4706 | Diag(Arg->getLocStart(), |
Douglas Gregor | 6ae5e66 | 2009-02-10 23:36:10 +0000 | [diff] [blame] | 4707 | diag::err_template_arg_not_convertible) |
Douglas Gregor | 2943aed | 2009-03-03 04:44:36 +0000 | [diff] [blame] | 4708 | << Arg->getType() << InstantiatedParamType << Arg->getSourceRange(); |
Douglas Gregor | 6ae5e66 | 2009-02-10 23:36:10 +0000 | [diff] [blame] | 4709 | Diag(Param->getLocation(), diag::note_template_param_here); |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4710 | return ExprError(); |
Douglas Gregor | 6ae5e66 | 2009-02-10 23:36:10 +0000 | [diff] [blame] | 4711 | } |
| 4712 | |
Douglas Gregor | c746937 | 2011-05-04 21:55:00 +0000 | [diff] [blame] | 4713 | // Add the value of this argument to the list of converted |
| 4714 | // arguments. We use the bitwidth and signedness of the template |
| 4715 | // parameter. |
| 4716 | if (Arg->isValueDependent()) { |
| 4717 | // The argument is value-dependent. Create a new |
| 4718 | // TemplateArgument with the converted expression. |
| 4719 | Converted = TemplateArgument(Arg); |
| 4720 | return Owned(Arg); |
| 4721 | } |
| 4722 | |
Douglas Gregor | f80a9d5 | 2009-03-14 00:20:21 +0000 | [diff] [blame] | 4723 | QualType IntegerType = Context.getCanonicalType(ParamType); |
John McCall | 183700f | 2009-09-21 23:43:11 +0000 | [diff] [blame] | 4724 | if (const EnumType *Enum = IntegerType->getAs<EnumType>()) |
Douglas Gregor | 02cbbd2 | 2009-06-11 18:10:32 +0000 | [diff] [blame] | 4725 | IntegerType = Context.getCanonicalType(Enum->getDecl()->getIntegerType()); |
Douglas Gregor | f80a9d5 | 2009-03-14 00:20:21 +0000 | [diff] [blame] | 4726 | |
Douglas Gregor | c746937 | 2011-05-04 21:55:00 +0000 | [diff] [blame] | 4727 | if (ParamType->isBooleanType()) { |
| 4728 | // Value must be zero or one. |
| 4729 | Value = Value != 0; |
| 4730 | unsigned AllowedBits = Context.getTypeSize(IntegerType); |
| 4731 | if (Value.getBitWidth() != AllowedBits) |
| 4732 | Value = Value.extOrTrunc(AllowedBits); |
Douglas Gregor | 575a1c9 | 2011-05-20 16:38:50 +0000 | [diff] [blame] | 4733 | Value.setIsSigned(IntegerType->isSignedIntegerOrEnumerationType()); |
Douglas Gregor | c746937 | 2011-05-04 21:55:00 +0000 | [diff] [blame] | 4734 | } else { |
Douglas Gregor | 1a6e034 | 2010-03-26 02:38:37 +0000 | [diff] [blame] | 4735 | llvm::APSInt OldValue = Value; |
Douglas Gregor | c746937 | 2011-05-04 21:55:00 +0000 | [diff] [blame] | 4736 | |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4737 | // Coerce the template argument's value to the value it will have |
Douglas Gregor | 1a6e034 | 2010-03-26 02:38:37 +0000 | [diff] [blame] | 4738 | // based on the template parameter's type. |
Douglas Gregor | 0d4fd8e | 2010-03-26 00:39:40 +0000 | [diff] [blame] | 4739 | unsigned AllowedBits = Context.getTypeSize(IntegerType); |
Douglas Gregor | 0d4fd8e | 2010-03-26 00:39:40 +0000 | [diff] [blame] | 4740 | if (Value.getBitWidth() != AllowedBits) |
Jay Foad | 9f71a8f | 2010-12-07 08:25:34 +0000 | [diff] [blame] | 4741 | Value = Value.extOrTrunc(AllowedBits); |
Douglas Gregor | 575a1c9 | 2011-05-20 16:38:50 +0000 | [diff] [blame] | 4742 | Value.setIsSigned(IntegerType->isSignedIntegerOrEnumerationType()); |
Douglas Gregor | c746937 | 2011-05-04 21:55:00 +0000 | [diff] [blame] | 4743 | |
Douglas Gregor | 1a6e034 | 2010-03-26 02:38:37 +0000 | [diff] [blame] | 4744 | // Complain if an unsigned parameter received a negative value. |
Douglas Gregor | 575a1c9 | 2011-05-20 16:38:50 +0000 | [diff] [blame] | 4745 | if (IntegerType->isUnsignedIntegerOrEnumerationType() |
Douglas Gregor | c746937 | 2011-05-04 21:55:00 +0000 | [diff] [blame] | 4746 | && (OldValue.isSigned() && OldValue.isNegative())) { |
Daniel Dunbar | 96a0014 | 2012-03-09 18:35:03 +0000 | [diff] [blame] | 4747 | Diag(Arg->getLocStart(), diag::warn_template_arg_negative) |
Douglas Gregor | 1a6e034 | 2010-03-26 02:38:37 +0000 | [diff] [blame] | 4748 | << OldValue.toString(10) << Value.toString(10) << Param->getType() |
| 4749 | << Arg->getSourceRange(); |
| 4750 | Diag(Param->getLocation(), diag::note_template_param_here); |
| 4751 | } |
Douglas Gregor | c746937 | 2011-05-04 21:55:00 +0000 | [diff] [blame] | 4752 | |
Douglas Gregor | 1a6e034 | 2010-03-26 02:38:37 +0000 | [diff] [blame] | 4753 | // Complain if we overflowed the template parameter's type. |
| 4754 | unsigned RequiredBits; |
Douglas Gregor | 575a1c9 | 2011-05-20 16:38:50 +0000 | [diff] [blame] | 4755 | if (IntegerType->isUnsignedIntegerOrEnumerationType()) |
Douglas Gregor | 1a6e034 | 2010-03-26 02:38:37 +0000 | [diff] [blame] | 4756 | RequiredBits = OldValue.getActiveBits(); |
| 4757 | else if (OldValue.isUnsigned()) |
| 4758 | RequiredBits = OldValue.getActiveBits() + 1; |
| 4759 | else |
| 4760 | RequiredBits = OldValue.getMinSignedBits(); |
| 4761 | if (RequiredBits > AllowedBits) { |
Daniel Dunbar | 96a0014 | 2012-03-09 18:35:03 +0000 | [diff] [blame] | 4762 | Diag(Arg->getLocStart(), |
Douglas Gregor | 1a6e034 | 2010-03-26 02:38:37 +0000 | [diff] [blame] | 4763 | diag::warn_template_arg_too_large) |
| 4764 | << OldValue.toString(10) << Value.toString(10) << Param->getType() |
| 4765 | << Arg->getSourceRange(); |
| 4766 | Diag(Param->getLocation(), diag::note_template_param_here); |
| 4767 | } |
Douglas Gregor | f80a9d5 | 2009-03-14 00:20:21 +0000 | [diff] [blame] | 4768 | } |
Douglas Gregor | 3e00bad | 2009-02-17 01:05:43 +0000 | [diff] [blame] | 4769 | |
Benjamin Kramer | 8552437 | 2012-06-07 15:09:51 +0000 | [diff] [blame] | 4770 | Converted = TemplateArgument(Context, Value, |
Douglas Gregor | 6b63f55 | 2011-08-09 01:55:14 +0000 | [diff] [blame] | 4771 | ParamType->isEnumeralType() |
| 4772 | ? Context.getCanonicalType(ParamType) |
| 4773 | : IntegerType); |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4774 | return Owned(Arg); |
Douglas Gregor | 6ae5e66 | 2009-02-10 23:36:10 +0000 | [diff] [blame] | 4775 | } |
Douglas Gregor | a35284b | 2009-02-11 00:19:33 +0000 | [diff] [blame] | 4776 | |
Richard Smith | 4f87062 | 2011-10-27 22:11:44 +0000 | [diff] [blame] | 4777 | QualType ArgType = Arg->getType(); |
John McCall | 6bb8017 | 2010-03-30 21:47:33 +0000 | [diff] [blame] | 4778 | DeclAccessPair FoundResult; // temporary for ResolveOverloadedFunction |
| 4779 | |
Douglas Gregor | b86b057 | 2009-02-11 01:18:59 +0000 | [diff] [blame] | 4780 | // Handle pointer-to-function, reference-to-function, and |
| 4781 | // pointer-to-member-function all in (roughly) the same way. |
| 4782 | if (// -- For a non-type template-parameter of type pointer to |
| 4783 | // function, only the function-to-pointer conversion (4.3) is |
| 4784 | // applied. If the template-argument represents a set of |
| 4785 | // overloaded functions (or a pointer to such), the matching |
| 4786 | // function is selected from the set (13.4). |
| 4787 | (ParamType->isPointerType() && |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 4788 | ParamType->getAs<PointerType>()->getPointeeType()->isFunctionType()) || |
Douglas Gregor | b86b057 | 2009-02-11 01:18:59 +0000 | [diff] [blame] | 4789 | // -- For a non-type template-parameter of type reference to |
| 4790 | // function, no conversions apply. If the template-argument |
| 4791 | // represents a set of overloaded functions, the matching |
| 4792 | // function is selected from the set (13.4). |
| 4793 | (ParamType->isReferenceType() && |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 4794 | ParamType->getAs<ReferenceType>()->getPointeeType()->isFunctionType()) || |
Douglas Gregor | b86b057 | 2009-02-11 01:18:59 +0000 | [diff] [blame] | 4795 | // -- For a non-type template-parameter of type pointer to |
| 4796 | // member function, no conversions apply. If the |
| 4797 | // template-argument represents a set of overloaded member |
| 4798 | // functions, the matching member function is selected from |
| 4799 | // the set (13.4). |
| 4800 | (ParamType->isMemberPointerType() && |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 4801 | ParamType->getAs<MemberPointerType>()->getPointeeType() |
Douglas Gregor | b86b057 | 2009-02-11 01:18:59 +0000 | [diff] [blame] | 4802 | ->isFunctionType())) { |
Douglas Gregor | b7a0926 | 2010-04-01 18:32:35 +0000 | [diff] [blame] | 4803 | |
Douglas Gregor | 1a8cf73 | 2010-04-14 23:11:21 +0000 | [diff] [blame] | 4804 | if (Arg->getType() == Context.OverloadTy) { |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4805 | if (FunctionDecl *Fn = ResolveAddressOfOverloadedFunction(Arg, ParamType, |
Douglas Gregor | 1a8cf73 | 2010-04-14 23:11:21 +0000 | [diff] [blame] | 4806 | true, |
| 4807 | FoundResult)) { |
Daniel Dunbar | 96a0014 | 2012-03-09 18:35:03 +0000 | [diff] [blame] | 4808 | if (DiagnoseUseOfDecl(Fn, Arg->getLocStart())) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4809 | return ExprError(); |
Douglas Gregor | 1a8cf73 | 2010-04-14 23:11:21 +0000 | [diff] [blame] | 4810 | |
| 4811 | Arg = FixOverloadedFunctionReference(Arg, FoundResult, Fn); |
| 4812 | ArgType = Arg->getType(); |
| 4813 | } else |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4814 | return ExprError(); |
Douglas Gregor | a35284b | 2009-02-11 00:19:33 +0000 | [diff] [blame] | 4815 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4816 | |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4817 | if (!ParamType->isMemberPointerType()) { |
| 4818 | if (CheckTemplateArgumentAddressOfObjectOrFunction(*this, Param, |
| 4819 | ParamType, |
| 4820 | Arg, Converted)) |
| 4821 | return ExprError(); |
| 4822 | return Owned(Arg); |
| 4823 | } |
Douglas Gregor | b7a0926 | 2010-04-01 18:32:35 +0000 | [diff] [blame] | 4824 | |
Douglas Gregor | 4296361 | 2012-04-10 17:08:25 +0000 | [diff] [blame] | 4825 | if (CheckTemplateArgumentPointerToMember(*this, Param, ParamType, Arg, |
| 4826 | Converted)) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4827 | return ExprError(); |
| 4828 | return Owned(Arg); |
Douglas Gregor | a35284b | 2009-02-11 00:19:33 +0000 | [diff] [blame] | 4829 | } |
| 4830 | |
Chris Lattner | fe90de7 | 2009-02-20 21:37:53 +0000 | [diff] [blame] | 4831 | if (ParamType->isPointerType()) { |
Douglas Gregor | b86b057 | 2009-02-11 01:18:59 +0000 | [diff] [blame] | 4832 | // -- for a non-type template-parameter of type pointer to |
| 4833 | // object, qualification conversions (4.4) and the |
| 4834 | // array-to-pointer conversion (4.2) are applied. |
Sebastian Redl | 6e8ed16 | 2009-05-10 18:38:11 +0000 | [diff] [blame] | 4835 | // C++0x also allows a value of std::nullptr_t. |
Eli Friedman | 1357869 | 2010-08-05 02:49:48 +0000 | [diff] [blame] | 4836 | assert(ParamType->getPointeeType()->isIncompleteOrObjectType() && |
Douglas Gregor | b86b057 | 2009-02-11 01:18:59 +0000 | [diff] [blame] | 4837 | "Only object pointers allowed here"); |
Douglas Gregor | f684e6e | 2009-02-11 00:44:29 +0000 | [diff] [blame] | 4838 | |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4839 | if (CheckTemplateArgumentAddressOfObjectOrFunction(*this, Param, |
| 4840 | ParamType, |
| 4841 | Arg, Converted)) |
| 4842 | return ExprError(); |
| 4843 | return Owned(Arg); |
Douglas Gregor | f684e6e | 2009-02-11 00:44:29 +0000 | [diff] [blame] | 4844 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4845 | |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 4846 | if (const ReferenceType *ParamRefType = ParamType->getAs<ReferenceType>()) { |
Douglas Gregor | b86b057 | 2009-02-11 01:18:59 +0000 | [diff] [blame] | 4847 | // -- For a non-type template-parameter of type reference to |
| 4848 | // object, no conversions apply. The type referred to by the |
| 4849 | // reference may be more cv-qualified than the (otherwise |
| 4850 | // identical) type of the template-argument. The |
| 4851 | // template-parameter is bound directly to the |
| 4852 | // template-argument, which must be an lvalue. |
Eli Friedman | 1357869 | 2010-08-05 02:49:48 +0000 | [diff] [blame] | 4853 | assert(ParamRefType->getPointeeType()->isIncompleteOrObjectType() && |
Douglas Gregor | b86b057 | 2009-02-11 01:18:59 +0000 | [diff] [blame] | 4854 | "Only object references allowed here"); |
Douglas Gregor | f684e6e | 2009-02-11 00:44:29 +0000 | [diff] [blame] | 4855 | |
Douglas Gregor | 1a8cf73 | 2010-04-14 23:11:21 +0000 | [diff] [blame] | 4856 | if (Arg->getType() == Context.OverloadTy) { |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4857 | if (FunctionDecl *Fn = ResolveAddressOfOverloadedFunction(Arg, |
| 4858 | ParamRefType->getPointeeType(), |
Douglas Gregor | 1a8cf73 | 2010-04-14 23:11:21 +0000 | [diff] [blame] | 4859 | true, |
| 4860 | FoundResult)) { |
Daniel Dunbar | 96a0014 | 2012-03-09 18:35:03 +0000 | [diff] [blame] | 4861 | if (DiagnoseUseOfDecl(Fn, Arg->getLocStart())) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4862 | return ExprError(); |
Douglas Gregor | 1a8cf73 | 2010-04-14 23:11:21 +0000 | [diff] [blame] | 4863 | |
| 4864 | Arg = FixOverloadedFunctionReference(Arg, FoundResult, Fn); |
| 4865 | ArgType = Arg->getType(); |
| 4866 | } else |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4867 | return ExprError(); |
Douglas Gregor | b86b057 | 2009-02-11 01:18:59 +0000 | [diff] [blame] | 4868 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4869 | |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4870 | if (CheckTemplateArgumentAddressOfObjectOrFunction(*this, Param, |
| 4871 | ParamType, |
| 4872 | Arg, Converted)) |
| 4873 | return ExprError(); |
| 4874 | return Owned(Arg); |
Douglas Gregor | b86b057 | 2009-02-11 01:18:59 +0000 | [diff] [blame] | 4875 | } |
Douglas Gregor | 658bbb5 | 2009-02-11 16:16:59 +0000 | [diff] [blame] | 4876 | |
Douglas Gregor | 4296361 | 2012-04-10 17:08:25 +0000 | [diff] [blame] | 4877 | // Deal with parameters of type std::nullptr_t. |
| 4878 | if (ParamType->isNullPtrType()) { |
| 4879 | if (Arg->isTypeDependent() || Arg->isValueDependent()) { |
| 4880 | Converted = TemplateArgument(Arg); |
| 4881 | return Owned(Arg); |
| 4882 | } |
| 4883 | |
| 4884 | switch (isNullPointerValueTemplateArgument(*this, Param, ParamType, Arg)) { |
| 4885 | case NPV_NotNullPointer: |
| 4886 | Diag(Arg->getExprLoc(), diag::err_template_arg_not_convertible) |
| 4887 | << Arg->getType() << ParamType; |
| 4888 | Diag(Param->getLocation(), diag::note_template_param_here); |
| 4889 | return ExprError(); |
| 4890 | |
| 4891 | case NPV_Error: |
| 4892 | return ExprError(); |
| 4893 | |
| 4894 | case NPV_NullPointer: |
Richard Smith | 86e6fdc | 2012-04-26 01:51:03 +0000 | [diff] [blame] | 4895 | Diag(Arg->getExprLoc(), diag::warn_cxx98_compat_template_arg_null); |
Eli Friedman | d7a6b16 | 2012-09-26 02:36:12 +0000 | [diff] [blame] | 4896 | Converted = TemplateArgument(ParamType, /*isNullPtr*/true); |
Dmitri Gribenko | 1ad23d6 | 2012-09-10 21:20:09 +0000 | [diff] [blame] | 4897 | return Owned(Arg); |
Douglas Gregor | 4296361 | 2012-04-10 17:08:25 +0000 | [diff] [blame] | 4898 | } |
| 4899 | } |
| 4900 | |
Douglas Gregor | 658bbb5 | 2009-02-11 16:16:59 +0000 | [diff] [blame] | 4901 | // -- For a non-type template-parameter of type pointer to data |
| 4902 | // member, qualification conversions (4.4) are applied. |
| 4903 | assert(ParamType->isMemberPointerType() && "Only pointers to members remain"); |
| 4904 | |
Douglas Gregor | 4296361 | 2012-04-10 17:08:25 +0000 | [diff] [blame] | 4905 | if (CheckTemplateArgumentPointerToMember(*this, Param, ParamType, Arg, |
| 4906 | Converted)) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4907 | return ExprError(); |
| 4908 | return Owned(Arg); |
Douglas Gregor | c15cb38 | 2009-02-09 23:23:08 +0000 | [diff] [blame] | 4909 | } |
| 4910 | |
| 4911 | /// \brief Check a template argument against its corresponding |
| 4912 | /// template template parameter. |
| 4913 | /// |
| 4914 | /// This routine implements the semantics of C++ [temp.arg.template]. |
| 4915 | /// It returns true if an error occurred, and false otherwise. |
| 4916 | bool Sema::CheckTemplateArgument(TemplateTemplateParmDecl *Param, |
Richard Smith | 6964b3f | 2012-09-07 02:06:42 +0000 | [diff] [blame] | 4917 | const TemplateArgumentLoc &Arg, |
| 4918 | unsigned ArgumentPackIndex) { |
Eli Friedman | d7a6b16 | 2012-09-26 02:36:12 +0000 | [diff] [blame] | 4919 | TemplateName Name = Arg.getArgument().getAsTemplateOrTemplatePattern(); |
Douglas Gregor | 788cd06 | 2009-11-11 01:00:40 +0000 | [diff] [blame] | 4920 | TemplateDecl *Template = Name.getAsTemplateDecl(); |
| 4921 | if (!Template) { |
| 4922 | // Any dependent template name is fine. |
| 4923 | assert(Name.isDependent() && "Non-dependent template isn't a declaration?"); |
| 4924 | return false; |
| 4925 | } |
Douglas Gregor | dd0574e | 2009-02-10 00:24:35 +0000 | [diff] [blame] | 4926 | |
Richard Smith | 3e4c6c4 | 2011-05-05 21:57:07 +0000 | [diff] [blame] | 4927 | // C++0x [temp.arg.template]p1: |
Douglas Gregor | dd0574e | 2009-02-10 00:24:35 +0000 | [diff] [blame] | 4928 | // A template-argument for a template template-parameter shall be |
Richard Smith | 3e4c6c4 | 2011-05-05 21:57:07 +0000 | [diff] [blame] | 4929 | // the name of a class template or an alias template, expressed as an |
| 4930 | // id-expression. When the template-argument names a class template, only |
Douglas Gregor | dd0574e | 2009-02-10 00:24:35 +0000 | [diff] [blame] | 4931 | // primary class templates are considered when matching the |
| 4932 | // template template argument with the corresponding parameter; |
| 4933 | // partial specializations are not considered even if their |
| 4934 | // parameter lists match that of the template template parameter. |
Douglas Gregor | ba1ecb5 | 2009-06-12 19:43:02 +0000 | [diff] [blame] | 4935 | // |
| 4936 | // Note that we also allow template template parameters here, which |
| 4937 | // will happen when we are dealing with, e.g., class template |
| 4938 | // partial specializations. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4939 | if (!isa<ClassTemplateDecl>(Template) && |
Richard Smith | 3e4c6c4 | 2011-05-05 21:57:07 +0000 | [diff] [blame] | 4940 | !isa<TemplateTemplateParmDecl>(Template) && |
| 4941 | !isa<TypeAliasTemplateDecl>(Template)) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4942 | assert(isa<FunctionTemplateDecl>(Template) && |
Douglas Gregor | dd0574e | 2009-02-10 00:24:35 +0000 | [diff] [blame] | 4943 | "Only function templates are possible here"); |
Douglas Gregor | 788cd06 | 2009-11-11 01:00:40 +0000 | [diff] [blame] | 4944 | Diag(Arg.getLocation(), diag::err_template_arg_not_class_template); |
Douglas Gregor | e53060f | 2009-06-25 22:08:12 +0000 | [diff] [blame] | 4945 | Diag(Template->getLocation(), diag::note_template_arg_refers_here_func) |
Douglas Gregor | dd0574e | 2009-02-10 00:24:35 +0000 | [diff] [blame] | 4946 | << Template; |
| 4947 | } |
| 4948 | |
Richard Smith | 6964b3f | 2012-09-07 02:06:42 +0000 | [diff] [blame] | 4949 | TemplateParameterList *Params = Param->getTemplateParameters(); |
| 4950 | if (Param->isExpandedParameterPack()) |
| 4951 | Params = Param->getExpansionTemplateParameters(ArgumentPackIndex); |
| 4952 | |
Douglas Gregor | dd0574e | 2009-02-10 00:24:35 +0000 | [diff] [blame] | 4953 | return !TemplateParameterListsAreEqual(Template->getTemplateParameters(), |
Richard Smith | 6964b3f | 2012-09-07 02:06:42 +0000 | [diff] [blame] | 4954 | Params, |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4955 | true, |
Douglas Gregor | fb898e1 | 2009-11-12 16:20:59 +0000 | [diff] [blame] | 4956 | TPL_TemplateTemplateArgumentMatch, |
Douglas Gregor | 788cd06 | 2009-11-11 01:00:40 +0000 | [diff] [blame] | 4957 | Arg.getLocation()); |
Douglas Gregor | c15cb38 | 2009-02-09 23:23:08 +0000 | [diff] [blame] | 4958 | } |
| 4959 | |
Douglas Gregor | 02024a9 | 2010-03-28 02:42:43 +0000 | [diff] [blame] | 4960 | /// \brief Given a non-type template argument that refers to a |
| 4961 | /// declaration and the type of its corresponding non-type template |
| 4962 | /// parameter, produce an expression that properly refers to that |
| 4963 | /// declaration. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4964 | ExprResult |
Douglas Gregor | 02024a9 | 2010-03-28 02:42:43 +0000 | [diff] [blame] | 4965 | Sema::BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, |
| 4966 | QualType ParamType, |
| 4967 | SourceLocation Loc) { |
David Blaikie | c0cedbe | 2013-02-27 22:10:40 +0000 | [diff] [blame] | 4968 | // C++ [temp.param]p8: |
| 4969 | // |
| 4970 | // A non-type template-parameter of type "array of T" or |
| 4971 | // "function returning T" is adjusted to be of type "pointer to |
| 4972 | // T" or "pointer to function returning T", respectively. |
| 4973 | if (ParamType->isArrayType()) |
| 4974 | ParamType = Context.getArrayDecayedType(ParamType); |
| 4975 | else if (ParamType->isFunctionType()) |
| 4976 | ParamType = Context.getPointerType(ParamType); |
| 4977 | |
Douglas Gregor | d2008e2 | 2012-04-06 22:40:38 +0000 | [diff] [blame] | 4978 | // For a NULL non-type template argument, return nullptr casted to the |
| 4979 | // parameter's type. |
Eli Friedman | d7a6b16 | 2012-09-26 02:36:12 +0000 | [diff] [blame] | 4980 | if (Arg.getKind() == TemplateArgument::NullPtr) { |
Douglas Gregor | d2008e2 | 2012-04-06 22:40:38 +0000 | [diff] [blame] | 4981 | return ImpCastExprToType( |
| 4982 | new (Context) CXXNullPtrLiteralExpr(Context.NullPtrTy, Loc), |
| 4983 | ParamType, |
| 4984 | ParamType->getAs<MemberPointerType>() |
| 4985 | ? CK_NullToMemberPointer |
| 4986 | : CK_NullToPointer); |
| 4987 | } |
Eli Friedman | d7a6b16 | 2012-09-26 02:36:12 +0000 | [diff] [blame] | 4988 | assert(Arg.getKind() == TemplateArgument::Declaration && |
| 4989 | "Only declaration template arguments permitted here"); |
| 4990 | |
Douglas Gregor | 02024a9 | 2010-03-28 02:42:43 +0000 | [diff] [blame] | 4991 | ValueDecl *VD = cast<ValueDecl>(Arg.getAsDecl()); |
| 4992 | |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4993 | if (VD->getDeclContext()->isRecord() && |
Douglas Gregor | 02024a9 | 2010-03-28 02:42:43 +0000 | [diff] [blame] | 4994 | (isa<CXXMethodDecl>(VD) || isa<FieldDecl>(VD))) { |
| 4995 | // If the value is a class member, we might have a pointer-to-member. |
| 4996 | // Determine whether the non-type template template parameter is of |
| 4997 | // pointer-to-member type. If so, we need to build an appropriate |
| 4998 | // expression for a pointer-to-member, since a "normal" DeclRefExpr |
| 4999 | // would refer to the member itself. |
| 5000 | if (ParamType->isMemberPointerType()) { |
| 5001 | QualType ClassType |
| 5002 | = Context.getTypeDeclType(cast<RecordDecl>(VD->getDeclContext())); |
| 5003 | NestedNameSpecifier *Qualifier |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 5004 | = NestedNameSpecifier::Create(Context, 0, false, |
| 5005 | ClassType.getTypePtr()); |
Douglas Gregor | 02024a9 | 2010-03-28 02:42:43 +0000 | [diff] [blame] | 5006 | CXXScopeSpec SS; |
Douglas Gregor | c34348a | 2011-02-24 17:54:50 +0000 | [diff] [blame] | 5007 | SS.MakeTrivial(Context, Qualifier, Loc); |
John McCall | dfa1edb | 2010-11-23 20:48:44 +0000 | [diff] [blame] | 5008 | |
| 5009 | // The actual value-ness of this is unimportant, but for |
| 5010 | // internal consistency's sake, references to instance methods |
| 5011 | // are r-values. |
| 5012 | ExprValueKind VK = VK_LValue; |
| 5013 | if (isa<CXXMethodDecl>(VD) && cast<CXXMethodDecl>(VD)->isInstance()) |
| 5014 | VK = VK_RValue; |
| 5015 | |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5016 | ExprResult RefExpr = BuildDeclRefExpr(VD, |
John McCall | f89e55a | 2010-11-18 06:31:45 +0000 | [diff] [blame] | 5017 | VD->getType().getNonReferenceType(), |
John McCall | dfa1edb | 2010-11-23 20:48:44 +0000 | [diff] [blame] | 5018 | VK, |
John McCall | f89e55a | 2010-11-18 06:31:45 +0000 | [diff] [blame] | 5019 | Loc, |
| 5020 | &SS); |
Douglas Gregor | 02024a9 | 2010-03-28 02:42:43 +0000 | [diff] [blame] | 5021 | if (RefExpr.isInvalid()) |
| 5022 | return ExprError(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5023 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 5024 | RefExpr = CreateBuiltinUnaryOp(Loc, UO_AddrOf, RefExpr.get()); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5025 | |
Douglas Gregor | c0c8300 | 2010-04-30 21:46:38 +0000 | [diff] [blame] | 5026 | // We might need to perform a trailing qualification conversion, since |
| 5027 | // the element type on the parameter could be more qualified than the |
| 5028 | // element type in the expression we constructed. |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 5029 | bool ObjCLifetimeConversion; |
Douglas Gregor | c0c8300 | 2010-04-30 21:46:38 +0000 | [diff] [blame] | 5030 | if (IsQualificationConversion(((Expr*) RefExpr.get())->getType(), |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 5031 | ParamType.getUnqualifiedType(), false, |
| 5032 | ObjCLifetimeConversion)) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 5033 | RefExpr = ImpCastExprToType(RefExpr.take(), ParamType.getUnqualifiedType(), CK_NoOp); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5034 | |
Douglas Gregor | 02024a9 | 2010-03-28 02:42:43 +0000 | [diff] [blame] | 5035 | assert(!RefExpr.isInvalid() && |
| 5036 | Context.hasSameType(((Expr*) RefExpr.get())->getType(), |
Douglas Gregor | c0c8300 | 2010-04-30 21:46:38 +0000 | [diff] [blame] | 5037 | ParamType.getUnqualifiedType())); |
Benjamin Kramer | 3fe198b | 2012-08-23 21:35:17 +0000 | [diff] [blame] | 5038 | return RefExpr; |
Douglas Gregor | 02024a9 | 2010-03-28 02:42:43 +0000 | [diff] [blame] | 5039 | } |
| 5040 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5041 | |
Douglas Gregor | 02024a9 | 2010-03-28 02:42:43 +0000 | [diff] [blame] | 5042 | QualType T = VD->getType().getNonReferenceType(); |
Douglas Gregor | b9df75f | 2013-01-16 00:52:15 +0000 | [diff] [blame] | 5043 | |
Douglas Gregor | 02024a9 | 2010-03-28 02:42:43 +0000 | [diff] [blame] | 5044 | if (ParamType->isPointerType()) { |
Douglas Gregor | b7a0926 | 2010-04-01 18:32:35 +0000 | [diff] [blame] | 5045 | // When the non-type template parameter is a pointer, take the |
| 5046 | // address of the declaration. |
John McCall | f89e55a | 2010-11-18 06:31:45 +0000 | [diff] [blame] | 5047 | ExprResult RefExpr = BuildDeclRefExpr(VD, T, VK_LValue, Loc); |
Douglas Gregor | 02024a9 | 2010-03-28 02:42:43 +0000 | [diff] [blame] | 5048 | if (RefExpr.isInvalid()) |
| 5049 | return ExprError(); |
Douglas Gregor | b7a0926 | 2010-04-01 18:32:35 +0000 | [diff] [blame] | 5050 | |
| 5051 | if (T->isFunctionType() || T->isArrayType()) { |
| 5052 | // Decay functions and arrays. |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 5053 | RefExpr = DefaultFunctionArrayConversion(RefExpr.take()); |
| 5054 | if (RefExpr.isInvalid()) |
| 5055 | return ExprError(); |
Douglas Gregor | b7a0926 | 2010-04-01 18:32:35 +0000 | [diff] [blame] | 5056 | |
Benjamin Kramer | 3fe198b | 2012-08-23 21:35:17 +0000 | [diff] [blame] | 5057 | return RefExpr; |
Douglas Gregor | 02024a9 | 2010-03-28 02:42:43 +0000 | [diff] [blame] | 5058 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5059 | |
Douglas Gregor | b7a0926 | 2010-04-01 18:32:35 +0000 | [diff] [blame] | 5060 | // Take the address of everything else |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 5061 | return CreateBuiltinUnaryOp(Loc, UO_AddrOf, RefExpr.get()); |
Douglas Gregor | 02024a9 | 2010-03-28 02:42:43 +0000 | [diff] [blame] | 5062 | } |
| 5063 | |
John McCall | f89e55a | 2010-11-18 06:31:45 +0000 | [diff] [blame] | 5064 | ExprValueKind VK = VK_RValue; |
| 5065 | |
Douglas Gregor | 02024a9 | 2010-03-28 02:42:43 +0000 | [diff] [blame] | 5066 | // If the non-type template parameter has reference type, qualify the |
| 5067 | // resulting declaration reference with the extra qualifiers on the |
| 5068 | // type that the reference refers to. |
John McCall | f89e55a | 2010-11-18 06:31:45 +0000 | [diff] [blame] | 5069 | if (const ReferenceType *TargetRef = ParamType->getAs<ReferenceType>()) { |
| 5070 | VK = VK_LValue; |
| 5071 | T = Context.getQualifiedType(T, |
| 5072 | TargetRef->getPointeeType().getQualifiers()); |
Douglas Gregor | b9df75f | 2013-01-16 00:52:15 +0000 | [diff] [blame] | 5073 | } else if (isa<FunctionDecl>(VD)) { |
| 5074 | // References to functions are always lvalues. |
| 5075 | VK = VK_LValue; |
John McCall | f89e55a | 2010-11-18 06:31:45 +0000 | [diff] [blame] | 5076 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5077 | |
John McCall | f89e55a | 2010-11-18 06:31:45 +0000 | [diff] [blame] | 5078 | return BuildDeclRefExpr(VD, T, VK, Loc); |
Douglas Gregor | 02024a9 | 2010-03-28 02:42:43 +0000 | [diff] [blame] | 5079 | } |
| 5080 | |
| 5081 | /// \brief Construct a new expression that refers to the given |
| 5082 | /// integral template argument with the given source-location |
| 5083 | /// information. |
| 5084 | /// |
| 5085 | /// This routine takes care of the mapping from an integral template |
| 5086 | /// argument (which may have any integral type) to the appropriate |
| 5087 | /// literal value. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5088 | ExprResult |
Douglas Gregor | 02024a9 | 2010-03-28 02:42:43 +0000 | [diff] [blame] | 5089 | Sema::BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, |
| 5090 | SourceLocation Loc) { |
| 5091 | assert(Arg.getKind() == TemplateArgument::Integral && |
Douglas Gregor | d373119 | 2011-01-10 07:32:04 +0000 | [diff] [blame] | 5092 | "Operation is only valid for integral template arguments"); |
Benjamin Kramer | 39ad0f0 | 2012-11-21 17:42:47 +0000 | [diff] [blame] | 5093 | QualType OrigT = Arg.getIntegralType(); |
| 5094 | |
| 5095 | // If this is an enum type that we're instantiating, we need to use an integer |
| 5096 | // type the same size as the enumerator. We don't want to build an |
| 5097 | // IntegerLiteral with enum type. The integer type of an enum type can be of |
| 5098 | // any integral type with C++11 enum classes, make sure we create the right |
| 5099 | // type of literal for it. |
| 5100 | QualType T = OrigT; |
| 5101 | if (const EnumType *ET = OrigT->getAs<EnumType>()) |
| 5102 | T = ET->getDecl()->getIntegerType(); |
| 5103 | |
| 5104 | Expr *E; |
Douglas Gregor | 5cee119 | 2011-07-27 05:40:30 +0000 | [diff] [blame] | 5105 | if (T->isAnyCharacterType()) { |
| 5106 | CharacterLiteral::CharacterKind Kind; |
| 5107 | if (T->isWideCharType()) |
| 5108 | Kind = CharacterLiteral::Wide; |
| 5109 | else if (T->isChar16Type()) |
| 5110 | Kind = CharacterLiteral::UTF16; |
| 5111 | else if (T->isChar32Type()) |
| 5112 | Kind = CharacterLiteral::UTF32; |
| 5113 | else |
| 5114 | Kind = CharacterLiteral::Ascii; |
| 5115 | |
Benjamin Kramer | 39ad0f0 | 2012-11-21 17:42:47 +0000 | [diff] [blame] | 5116 | E = new (Context) CharacterLiteral(Arg.getAsIntegral().getZExtValue(), |
| 5117 | Kind, T, Loc); |
| 5118 | } else if (T->isBooleanType()) { |
| 5119 | E = new (Context) CXXBoolLiteralExpr(Arg.getAsIntegral().getBoolValue(), |
| 5120 | T, Loc); |
| 5121 | } else if (T->isNullPtrType()) { |
| 5122 | E = new (Context) CXXNullPtrLiteralExpr(Context.NullPtrTy, Loc); |
| 5123 | } else { |
| 5124 | E = IntegerLiteral::Create(Context, Arg.getAsIntegral(), T, Loc); |
Douglas Gregor | 5cee119 | 2011-07-27 05:40:30 +0000 | [diff] [blame] | 5125 | } |
| 5126 | |
Benjamin Kramer | 39ad0f0 | 2012-11-21 17:42:47 +0000 | [diff] [blame] | 5127 | if (OrigT->isEnumeralType()) { |
John McCall | 4e9272d | 2011-07-15 07:47:58 +0000 | [diff] [blame] | 5128 | // FIXME: This is a hack. We need a better way to handle substituted |
| 5129 | // non-type template parameters. |
Benjamin Kramer | 39ad0f0 | 2012-11-21 17:42:47 +0000 | [diff] [blame] | 5130 | E = CStyleCastExpr::Create(Context, OrigT, VK_RValue, CK_IntegralCast, E, 0, |
| 5131 | Context.getTrivialTypeSourceInfo(OrigT, Loc), |
John McCall | 4e9272d | 2011-07-15 07:47:58 +0000 | [diff] [blame] | 5132 | Loc, Loc); |
| 5133 | } |
| 5134 | |
| 5135 | return Owned(E); |
Douglas Gregor | 02024a9 | 2010-03-28 02:42:43 +0000 | [diff] [blame] | 5136 | } |
| 5137 | |
Douglas Gregor | ab7ddf0 | 2011-01-12 23:45:44 +0000 | [diff] [blame] | 5138 | /// \brief Match two template parameters within template parameter lists. |
| 5139 | static bool MatchTemplateParameterKind(Sema &S, NamedDecl *New, NamedDecl *Old, |
| 5140 | bool Complain, |
| 5141 | Sema::TemplateParameterListEqualKind Kind, |
| 5142 | SourceLocation TemplateArgLoc) { |
| 5143 | // Check the actual kind (type, non-type, template). |
| 5144 | if (Old->getKind() != New->getKind()) { |
| 5145 | if (Complain) { |
| 5146 | unsigned NextDiag = diag::err_template_param_different_kind; |
| 5147 | if (TemplateArgLoc.isValid()) { |
| 5148 | S.Diag(TemplateArgLoc, diag::err_template_arg_template_params_mismatch); |
| 5149 | NextDiag = diag::note_template_param_different_kind; |
| 5150 | } |
| 5151 | S.Diag(New->getLocation(), NextDiag) |
| 5152 | << (Kind != Sema::TPL_TemplateMatch); |
| 5153 | S.Diag(Old->getLocation(), diag::note_template_prev_declaration) |
| 5154 | << (Kind != Sema::TPL_TemplateMatch); |
| 5155 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5156 | |
Douglas Gregor | ab7ddf0 | 2011-01-12 23:45:44 +0000 | [diff] [blame] | 5157 | return false; |
| 5158 | } |
| 5159 | |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5160 | // Check that both are parameter packs are neither are parameter packs. |
| 5161 | // However, if we are matching a template template argument to a |
Douglas Gregor | a034782 | 2011-01-13 00:08:50 +0000 | [diff] [blame] | 5162 | // template template parameter, the template template parameter can have |
| 5163 | // a parameter pack where the template template argument does not. |
| 5164 | if (Old->isTemplateParameterPack() != New->isTemplateParameterPack() && |
| 5165 | !(Kind == Sema::TPL_TemplateTemplateArgumentMatch && |
| 5166 | Old->isTemplateParameterPack())) { |
Douglas Gregor | ab7ddf0 | 2011-01-12 23:45:44 +0000 | [diff] [blame] | 5167 | if (Complain) { |
| 5168 | unsigned NextDiag = diag::err_template_parameter_pack_non_pack; |
| 5169 | if (TemplateArgLoc.isValid()) { |
| 5170 | S.Diag(TemplateArgLoc, |
| 5171 | diag::err_template_arg_template_params_mismatch); |
| 5172 | NextDiag = diag::note_template_parameter_pack_non_pack; |
| 5173 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5174 | |
Douglas Gregor | ab7ddf0 | 2011-01-12 23:45:44 +0000 | [diff] [blame] | 5175 | unsigned ParamKind = isa<TemplateTypeParmDecl>(New)? 0 |
| 5176 | : isa<NonTypeTemplateParmDecl>(New)? 1 |
| 5177 | : 2; |
| 5178 | S.Diag(New->getLocation(), NextDiag) |
| 5179 | << ParamKind << New->isParameterPack(); |
| 5180 | S.Diag(Old->getLocation(), diag::note_template_parameter_pack_here) |
| 5181 | << ParamKind << Old->isParameterPack(); |
| 5182 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5183 | |
Douglas Gregor | ab7ddf0 | 2011-01-12 23:45:44 +0000 | [diff] [blame] | 5184 | return false; |
| 5185 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5186 | |
Douglas Gregor | ab7ddf0 | 2011-01-12 23:45:44 +0000 | [diff] [blame] | 5187 | // For non-type template parameters, check the type of the parameter. |
| 5188 | if (NonTypeTemplateParmDecl *OldNTTP |
| 5189 | = dyn_cast<NonTypeTemplateParmDecl>(Old)) { |
| 5190 | NonTypeTemplateParmDecl *NewNTTP = cast<NonTypeTemplateParmDecl>(New); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5191 | |
Douglas Gregor | ab7ddf0 | 2011-01-12 23:45:44 +0000 | [diff] [blame] | 5192 | // If we are matching a template template argument to a template |
| 5193 | // template parameter and one of the non-type template parameter types |
| 5194 | // is dependent, then we must wait until template instantiation time |
| 5195 | // to actually compare the arguments. |
| 5196 | if (Kind == Sema::TPL_TemplateTemplateArgumentMatch && |
| 5197 | (OldNTTP->getType()->isDependentType() || |
| 5198 | NewNTTP->getType()->isDependentType())) |
| 5199 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5200 | |
Douglas Gregor | ab7ddf0 | 2011-01-12 23:45:44 +0000 | [diff] [blame] | 5201 | if (!S.Context.hasSameType(OldNTTP->getType(), NewNTTP->getType())) { |
| 5202 | if (Complain) { |
| 5203 | unsigned NextDiag = diag::err_template_nontype_parm_different_type; |
| 5204 | if (TemplateArgLoc.isValid()) { |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5205 | S.Diag(TemplateArgLoc, |
Douglas Gregor | ab7ddf0 | 2011-01-12 23:45:44 +0000 | [diff] [blame] | 5206 | diag::err_template_arg_template_params_mismatch); |
| 5207 | NextDiag = diag::note_template_nontype_parm_different_type; |
| 5208 | } |
| 5209 | S.Diag(NewNTTP->getLocation(), NextDiag) |
| 5210 | << NewNTTP->getType() |
| 5211 | << (Kind != Sema::TPL_TemplateMatch); |
| 5212 | S.Diag(OldNTTP->getLocation(), |
| 5213 | diag::note_template_nontype_parm_prev_declaration) |
| 5214 | << OldNTTP->getType(); |
| 5215 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5216 | |
Douglas Gregor | ab7ddf0 | 2011-01-12 23:45:44 +0000 | [diff] [blame] | 5217 | return false; |
| 5218 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5219 | |
Douglas Gregor | ab7ddf0 | 2011-01-12 23:45:44 +0000 | [diff] [blame] | 5220 | return true; |
| 5221 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5222 | |
Douglas Gregor | ab7ddf0 | 2011-01-12 23:45:44 +0000 | [diff] [blame] | 5223 | // For template template parameters, check the template parameter types. |
| 5224 | // The template parameter lists of template template |
| 5225 | // parameters must agree. |
| 5226 | if (TemplateTemplateParmDecl *OldTTP |
| 5227 | = dyn_cast<TemplateTemplateParmDecl>(Old)) { |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5228 | TemplateTemplateParmDecl *NewTTP = cast<TemplateTemplateParmDecl>(New); |
Douglas Gregor | ab7ddf0 | 2011-01-12 23:45:44 +0000 | [diff] [blame] | 5229 | return S.TemplateParameterListsAreEqual(NewTTP->getTemplateParameters(), |
| 5230 | OldTTP->getTemplateParameters(), |
| 5231 | Complain, |
| 5232 | (Kind == Sema::TPL_TemplateMatch |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5233 | ? Sema::TPL_TemplateTemplateParmMatch |
Douglas Gregor | ab7ddf0 | 2011-01-12 23:45:44 +0000 | [diff] [blame] | 5234 | : Kind), |
| 5235 | TemplateArgLoc); |
| 5236 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5237 | |
Douglas Gregor | ab7ddf0 | 2011-01-12 23:45:44 +0000 | [diff] [blame] | 5238 | return true; |
| 5239 | } |
Douglas Gregor | 02024a9 | 2010-03-28 02:42:43 +0000 | [diff] [blame] | 5240 | |
Douglas Gregor | a034782 | 2011-01-13 00:08:50 +0000 | [diff] [blame] | 5241 | /// \brief Diagnose a known arity mismatch when comparing template argument |
| 5242 | /// lists. |
| 5243 | static |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5244 | void DiagnoseTemplateParameterListArityMismatch(Sema &S, |
Douglas Gregor | a034782 | 2011-01-13 00:08:50 +0000 | [diff] [blame] | 5245 | TemplateParameterList *New, |
| 5246 | TemplateParameterList *Old, |
| 5247 | Sema::TemplateParameterListEqualKind Kind, |
| 5248 | SourceLocation TemplateArgLoc) { |
| 5249 | unsigned NextDiag = diag::err_template_param_list_different_arity; |
| 5250 | if (TemplateArgLoc.isValid()) { |
| 5251 | S.Diag(TemplateArgLoc, diag::err_template_arg_template_params_mismatch); |
| 5252 | NextDiag = diag::note_template_param_list_different_arity; |
| 5253 | } |
| 5254 | S.Diag(New->getTemplateLoc(), NextDiag) |
| 5255 | << (New->size() > Old->size()) |
| 5256 | << (Kind != Sema::TPL_TemplateMatch) |
| 5257 | << SourceRange(New->getTemplateLoc(), New->getRAngleLoc()); |
| 5258 | S.Diag(Old->getTemplateLoc(), diag::note_template_prev_declaration) |
| 5259 | << (Kind != Sema::TPL_TemplateMatch) |
| 5260 | << SourceRange(Old->getTemplateLoc(), Old->getRAngleLoc()); |
| 5261 | } |
| 5262 | |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 5263 | /// \brief Determine whether the given template parameter lists are |
| 5264 | /// equivalent. |
| 5265 | /// |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5266 | /// \param New The new template parameter list, typically written in the |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 5267 | /// source code as part of a new template declaration. |
| 5268 | /// |
| 5269 | /// \param Old The old template parameter list, typically found via |
| 5270 | /// name lookup of the template declared with this template parameter |
| 5271 | /// list. |
| 5272 | /// |
| 5273 | /// \param Complain If true, this routine will produce a diagnostic if |
| 5274 | /// the template parameter lists are not equivalent. |
| 5275 | /// |
Douglas Gregor | fb898e1 | 2009-11-12 16:20:59 +0000 | [diff] [blame] | 5276 | /// \param Kind describes how we are to match the template parameter lists. |
Douglas Gregor | dd0574e | 2009-02-10 00:24:35 +0000 | [diff] [blame] | 5277 | /// |
| 5278 | /// \param TemplateArgLoc If this source location is valid, then we |
| 5279 | /// are actually checking the template parameter list of a template |
| 5280 | /// argument (New) against the template parameter list of its |
| 5281 | /// corresponding template template parameter (Old). We produce |
| 5282 | /// slightly different diagnostics in this scenario. |
| 5283 | /// |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 5284 | /// \returns True if the template parameter lists are equal, false |
| 5285 | /// otherwise. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5286 | bool |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 5287 | Sema::TemplateParameterListsAreEqual(TemplateParameterList *New, |
| 5288 | TemplateParameterList *Old, |
| 5289 | bool Complain, |
Douglas Gregor | fb898e1 | 2009-11-12 16:20:59 +0000 | [diff] [blame] | 5290 | TemplateParameterListEqualKind Kind, |
Douglas Gregor | dd0574e | 2009-02-10 00:24:35 +0000 | [diff] [blame] | 5291 | SourceLocation TemplateArgLoc) { |
Douglas Gregor | a034782 | 2011-01-13 00:08:50 +0000 | [diff] [blame] | 5292 | if (Old->size() != New->size() && Kind != TPL_TemplateTemplateArgumentMatch) { |
| 5293 | if (Complain) |
| 5294 | DiagnoseTemplateParameterListArityMismatch(*this, New, Old, Kind, |
| 5295 | TemplateArgLoc); |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 5296 | |
| 5297 | return false; |
| 5298 | } |
| 5299 | |
Douglas Gregor | ab7ddf0 | 2011-01-12 23:45:44 +0000 | [diff] [blame] | 5300 | // C++0x [temp.arg.template]p3: |
| 5301 | // A template-argument matches a template template-parameter (call it P) |
NAKAMURA Takumi | 0099530 | 2011-01-27 07:09:49 +0000 | [diff] [blame] | 5302 | // when each of the template parameters in the template-parameter-list of |
Richard Smith | 3e4c6c4 | 2011-05-05 21:57:07 +0000 | [diff] [blame] | 5303 | // the template-argument's corresponding class template or alias template |
NAKAMURA Takumi | 0099530 | 2011-01-27 07:09:49 +0000 | [diff] [blame] | 5304 | // (call it A) matches the corresponding template parameter in the |
Douglas Gregor | a034782 | 2011-01-13 00:08:50 +0000 | [diff] [blame] | 5305 | // template-parameter-list of P. [...] |
| 5306 | TemplateParameterList::iterator NewParm = New->begin(); |
| 5307 | TemplateParameterList::iterator NewParmEnd = New->end(); |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 5308 | for (TemplateParameterList::iterator OldParm = Old->begin(), |
Douglas Gregor | a034782 | 2011-01-13 00:08:50 +0000 | [diff] [blame] | 5309 | OldParmEnd = Old->end(); |
| 5310 | OldParm != OldParmEnd; ++OldParm) { |
Douglas Gregor | c421f54 | 2011-01-13 18:47:47 +0000 | [diff] [blame] | 5311 | if (Kind != TPL_TemplateTemplateArgumentMatch || |
| 5312 | !(*OldParm)->isTemplateParameterPack()) { |
Douglas Gregor | a034782 | 2011-01-13 00:08:50 +0000 | [diff] [blame] | 5313 | if (NewParm == NewParmEnd) { |
| 5314 | if (Complain) |
| 5315 | DiagnoseTemplateParameterListArityMismatch(*this, New, Old, Kind, |
| 5316 | TemplateArgLoc); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5317 | |
Douglas Gregor | a034782 | 2011-01-13 00:08:50 +0000 | [diff] [blame] | 5318 | return false; |
| 5319 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5320 | |
Douglas Gregor | a034782 | 2011-01-13 00:08:50 +0000 | [diff] [blame] | 5321 | if (!MatchTemplateParameterKind(*this, *NewParm, *OldParm, Complain, |
| 5322 | Kind, TemplateArgLoc)) |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5323 | return false; |
| 5324 | |
Douglas Gregor | a034782 | 2011-01-13 00:08:50 +0000 | [diff] [blame] | 5325 | ++NewParm; |
| 5326 | continue; |
| 5327 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5328 | |
Douglas Gregor | a034782 | 2011-01-13 00:08:50 +0000 | [diff] [blame] | 5329 | // C++0x [temp.arg.template]p3: |
NAKAMURA Takumi | 0099530 | 2011-01-27 07:09:49 +0000 | [diff] [blame] | 5330 | // [...] When P's template- parameter-list contains a template parameter |
| 5331 | // pack (14.5.3), the template parameter pack will match zero or more |
| 5332 | // template parameters or template parameter packs in the |
Douglas Gregor | a034782 | 2011-01-13 00:08:50 +0000 | [diff] [blame] | 5333 | // template-parameter-list of A with the same type and form as the |
| 5334 | // template parameter pack in P (ignoring whether those template |
| 5335 | // parameters are template parameter packs). |
| 5336 | for (; NewParm != NewParmEnd; ++NewParm) { |
| 5337 | if (!MatchTemplateParameterKind(*this, *NewParm, *OldParm, Complain, |
| 5338 | Kind, TemplateArgLoc)) |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5339 | return false; |
Douglas Gregor | a034782 | 2011-01-13 00:08:50 +0000 | [diff] [blame] | 5340 | } |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 5341 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5342 | |
Douglas Gregor | a034782 | 2011-01-13 00:08:50 +0000 | [diff] [blame] | 5343 | // Make sure we exhausted all of the arguments. |
| 5344 | if (NewParm != NewParmEnd) { |
| 5345 | if (Complain) |
| 5346 | DiagnoseTemplateParameterListArityMismatch(*this, New, Old, Kind, |
| 5347 | TemplateArgLoc); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5348 | |
Douglas Gregor | a034782 | 2011-01-13 00:08:50 +0000 | [diff] [blame] | 5349 | return false; |
| 5350 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5351 | |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 5352 | return true; |
| 5353 | } |
| 5354 | |
| 5355 | /// \brief Check whether a template can be declared within this scope. |
| 5356 | /// |
| 5357 | /// If the template declaration is valid in this scope, returns |
| 5358 | /// false. Otherwise, issues a diagnostic and returns true. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5359 | bool |
Douglas Gregor | 05396e2 | 2009-08-25 17:23:04 +0000 | [diff] [blame] | 5360 | Sema::CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams) { |
Douglas Gregor | fb35e8f | 2011-11-03 16:37:14 +0000 | [diff] [blame] | 5361 | if (!S) |
| 5362 | return false; |
| 5363 | |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 5364 | // Find the nearest enclosing declaration scope. |
| 5365 | while ((S->getFlags() & Scope::DeclScope) == 0 || |
| 5366 | (S->getFlags() & Scope::TemplateParamScope) != 0) |
| 5367 | S = S->getParent(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5368 | |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 5369 | // C++ [temp]p2: |
| 5370 | // A template-declaration can appear only as a namespace scope or |
| 5371 | // class scope declaration. |
| 5372 | DeclContext *Ctx = static_cast<DeclContext *>(S->getEntity()); |
Eli Friedman | 1503f77 | 2009-07-31 01:43:05 +0000 | [diff] [blame] | 5373 | if (Ctx && isa<LinkageSpecDecl>(Ctx) && |
| 5374 | cast<LinkageSpecDecl>(Ctx)->getLanguage() != LinkageSpecDecl::lang_cxx) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5375 | return Diag(TemplateParams->getTemplateLoc(), diag::err_template_linkage) |
Douglas Gregor | 05396e2 | 2009-08-25 17:23:04 +0000 | [diff] [blame] | 5376 | << TemplateParams->getSourceRange(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5377 | |
Eli Friedman | 1503f77 | 2009-07-31 01:43:05 +0000 | [diff] [blame] | 5378 | while (Ctx && isa<LinkageSpecDecl>(Ctx)) |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 5379 | Ctx = Ctx->getParent(); |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 5380 | |
| 5381 | if (Ctx && (Ctx->isFileContext() || Ctx->isRecord())) |
| 5382 | return false; |
| 5383 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5384 | return Diag(TemplateParams->getTemplateLoc(), |
Douglas Gregor | 05396e2 | 2009-08-25 17:23:04 +0000 | [diff] [blame] | 5385 | diag::err_template_outside_namespace_or_class_scope) |
| 5386 | << TemplateParams->getSourceRange(); |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 5387 | } |
Douglas Gregor | cc63668 | 2009-02-17 23:15:12 +0000 | [diff] [blame] | 5388 | |
Douglas Gregor | d5cb876 | 2009-10-07 00:13:32 +0000 | [diff] [blame] | 5389 | /// \brief Determine what kind of template specialization the given declaration |
| 5390 | /// is. |
Douglas Gregor | f785a7d | 2012-01-14 15:55:47 +0000 | [diff] [blame] | 5391 | static TemplateSpecializationKind getTemplateSpecializationKind(Decl *D) { |
Douglas Gregor | d5cb876 | 2009-10-07 00:13:32 +0000 | [diff] [blame] | 5392 | if (!D) |
| 5393 | return TSK_Undeclared; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5394 | |
Douglas Gregor | f6b1185 | 2009-10-08 15:14:33 +0000 | [diff] [blame] | 5395 | if (CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(D)) |
| 5396 | return Record->getTemplateSpecializationKind(); |
Douglas Gregor | d5cb876 | 2009-10-07 00:13:32 +0000 | [diff] [blame] | 5397 | if (FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) |
| 5398 | return Function->getTemplateSpecializationKind(); |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 5399 | if (VarDecl *Var = dyn_cast<VarDecl>(D)) |
| 5400 | return Var->getTemplateSpecializationKind(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5401 | |
Douglas Gregor | d5cb876 | 2009-10-07 00:13:32 +0000 | [diff] [blame] | 5402 | return TSK_Undeclared; |
| 5403 | } |
| 5404 | |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5405 | /// \brief Check whether a specialization is well-formed in the current |
Douglas Gregor | 9302da6 | 2009-10-14 23:50:59 +0000 | [diff] [blame] | 5406 | /// context. |
Douglas Gregor | 88b7094 | 2009-02-25 22:02:03 +0000 | [diff] [blame] | 5407 | /// |
Douglas Gregor | 9302da6 | 2009-10-14 23:50:59 +0000 | [diff] [blame] | 5408 | /// This routine determines whether a template specialization can be declared |
| 5409 | /// in the current context (C++ [temp.expl.spec]p2). |
Douglas Gregor | d5cb876 | 2009-10-07 00:13:32 +0000 | [diff] [blame] | 5410 | /// |
| 5411 | /// \param S the semantic analysis object for which this check is being |
| 5412 | /// performed. |
| 5413 | /// |
| 5414 | /// \param Specialized the entity being specialized or instantiated, which |
| 5415 | /// may be a kind of template (class template, function template, etc.) or |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5416 | /// a member of a class template (member function, static data member, |
Douglas Gregor | d5cb876 | 2009-10-07 00:13:32 +0000 | [diff] [blame] | 5417 | /// member class). |
| 5418 | /// |
| 5419 | /// \param PrevDecl the previous declaration of this entity, if any. |
| 5420 | /// |
| 5421 | /// \param Loc the location of the explicit specialization or instantiation of |
| 5422 | /// this entity. |
| 5423 | /// |
| 5424 | /// \param IsPartialSpecialization whether this is a partial specialization of |
| 5425 | /// a class template. |
| 5426 | /// |
Douglas Gregor | d5cb876 | 2009-10-07 00:13:32 +0000 | [diff] [blame] | 5427 | /// \returns true if there was an error that we cannot recover from, false |
| 5428 | /// otherwise. |
| 5429 | static bool CheckTemplateSpecializationScope(Sema &S, |
| 5430 | NamedDecl *Specialized, |
| 5431 | NamedDecl *PrevDecl, |
| 5432 | SourceLocation Loc, |
Douglas Gregor | 9302da6 | 2009-10-14 23:50:59 +0000 | [diff] [blame] | 5433 | bool IsPartialSpecialization) { |
Douglas Gregor | d5cb876 | 2009-10-07 00:13:32 +0000 | [diff] [blame] | 5434 | // Keep these "kind" numbers in sync with the %select statements in the |
| 5435 | // various diagnostics emitted by this routine. |
| 5436 | int EntityKind = 0; |
Ted Kremenek | fe62b06 | 2011-01-14 22:31:36 +0000 | [diff] [blame] | 5437 | if (isa<ClassTemplateDecl>(Specialized)) |
Douglas Gregor | d5cb876 | 2009-10-07 00:13:32 +0000 | [diff] [blame] | 5438 | EntityKind = IsPartialSpecialization? 1 : 0; |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 5439 | else if (isa<VarTemplateDecl>(Specialized)) |
| 5440 | EntityKind = IsPartialSpecialization ? 3 : 2; |
Ted Kremenek | fe62b06 | 2011-01-14 22:31:36 +0000 | [diff] [blame] | 5441 | else if (isa<FunctionTemplateDecl>(Specialized)) |
Douglas Gregor | d5cb876 | 2009-10-07 00:13:32 +0000 | [diff] [blame] | 5442 | EntityKind = 4; |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 5443 | else if (isa<CXXMethodDecl>(Specialized)) |
Douglas Gregor | d5cb876 | 2009-10-07 00:13:32 +0000 | [diff] [blame] | 5444 | EntityKind = 5; |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 5445 | else if (isa<VarDecl>(Specialized)) |
Richard Smith | 1af83c4 | 2012-03-23 03:33:32 +0000 | [diff] [blame] | 5446 | EntityKind = 6; |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 5447 | else if (isa<RecordDecl>(Specialized)) |
| 5448 | EntityKind = 7; |
| 5449 | else if (isa<EnumDecl>(Specialized) && S.getLangOpts().CPlusPlus11) |
| 5450 | EntityKind = 8; |
Douglas Gregor | d5cb876 | 2009-10-07 00:13:32 +0000 | [diff] [blame] | 5451 | else { |
Richard Smith | 1af83c4 | 2012-03-23 03:33:32 +0000 | [diff] [blame] | 5452 | S.Diag(Loc, diag::err_template_spec_unknown_kind) |
Richard Smith | 80ad52f | 2013-01-02 11:42:31 +0000 | [diff] [blame] | 5453 | << S.getLangOpts().CPlusPlus11; |
Douglas Gregor | 9302da6 | 2009-10-14 23:50:59 +0000 | [diff] [blame] | 5454 | S.Diag(Specialized->getLocation(), diag::note_specialized_entity); |
Douglas Gregor | d5cb876 | 2009-10-07 00:13:32 +0000 | [diff] [blame] | 5455 | return true; |
| 5456 | } |
| 5457 | |
Douglas Gregor | 88b7094 | 2009-02-25 22:02:03 +0000 | [diff] [blame] | 5458 | // C++ [temp.expl.spec]p2: |
| 5459 | // An explicit specialization shall be declared in the namespace |
| 5460 | // of which the template is a member, or, for member templates, in |
| 5461 | // the namespace of which the enclosing class or enclosing class |
| 5462 | // template is a member. An explicit specialization of a member |
| 5463 | // function, member class or static data member of a class |
| 5464 | // template shall be declared in the namespace of which the class |
| 5465 | // template is a member. Such a declaration may also be a |
| 5466 | // definition. If the declaration is not a definition, the |
| 5467 | // specialization may be defined later in the name- space in which |
| 5468 | // the explicit specialization was declared, or in a namespace |
| 5469 | // that encloses the one in which the explicit specialization was |
| 5470 | // declared. |
Sebastian Redl | 7a126a4 | 2010-08-31 00:36:30 +0000 | [diff] [blame] | 5471 | if (S.CurContext->getRedeclContext()->isFunctionOrMethod()) { |
Douglas Gregor | d5cb876 | 2009-10-07 00:13:32 +0000 | [diff] [blame] | 5472 | S.Diag(Loc, diag::err_template_spec_decl_function_scope) |
Douglas Gregor | 9302da6 | 2009-10-14 23:50:59 +0000 | [diff] [blame] | 5473 | << Specialized; |
Douglas Gregor | 88b7094 | 2009-02-25 22:02:03 +0000 | [diff] [blame] | 5474 | return true; |
| 5475 | } |
Douglas Gregor | 7974c3b | 2009-10-07 17:21:34 +0000 | [diff] [blame] | 5476 | |
Douglas Gregor | 0a40747 | 2009-10-07 17:30:37 +0000 | [diff] [blame] | 5477 | if (S.CurContext->isRecord() && !IsPartialSpecialization) { |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 5478 | if (S.getLangOpts().MicrosoftExt) { |
Francois Pichet | af0f4d0 | 2011-08-14 03:52:19 +0000 | [diff] [blame] | 5479 | // Do not warn for class scope explicit specialization during |
| 5480 | // instantiation, warning was already emitted during pattern |
| 5481 | // semantic analysis. |
| 5482 | if (!S.ActiveTemplateInstantiations.size()) |
| 5483 | S.Diag(Loc, diag::ext_function_specialization_in_class) |
| 5484 | << Specialized; |
| 5485 | } else { |
| 5486 | S.Diag(Loc, diag::err_template_spec_decl_class_scope) |
| 5487 | << Specialized; |
| 5488 | return true; |
| 5489 | } |
Douglas Gregor | 0a40747 | 2009-10-07 17:30:37 +0000 | [diff] [blame] | 5490 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5491 | |
Douglas Gregor | 8e0c118 | 2011-10-20 16:41:18 +0000 | [diff] [blame] | 5492 | if (S.CurContext->isRecord() && |
| 5493 | !S.CurContext->Equals(Specialized->getDeclContext())) { |
| 5494 | // Make sure that we're specializing in the right record context. |
| 5495 | // Otherwise, things can go horribly wrong. |
| 5496 | S.Diag(Loc, diag::err_template_spec_decl_class_scope) |
| 5497 | << Specialized; |
| 5498 | return true; |
| 5499 | } |
| 5500 | |
Douglas Gregor | 7974c3b | 2009-10-07 17:21:34 +0000 | [diff] [blame] | 5501 | // C++ [temp.class.spec]p6: |
| 5502 | // A class template partial specialization may be declared or redeclared |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5503 | // in any namespace scope in which its definition may be defined (14.5.1 |
| 5504 | // and 14.5.2). |
Douglas Gregor | d5cb876 | 2009-10-07 00:13:32 +0000 | [diff] [blame] | 5505 | bool ComplainedAboutScope = false; |
Douglas Gregor | 8e0c118 | 2011-10-20 16:41:18 +0000 | [diff] [blame] | 5506 | DeclContext *SpecializedContext |
Douglas Gregor | d5cb876 | 2009-10-07 00:13:32 +0000 | [diff] [blame] | 5507 | = Specialized->getDeclContext()->getEnclosingNamespaceContext(); |
Douglas Gregor | 7974c3b | 2009-10-07 17:21:34 +0000 | [diff] [blame] | 5508 | DeclContext *DC = S.CurContext->getEnclosingNamespaceContext(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5509 | if ((!PrevDecl || |
Douglas Gregor | 9302da6 | 2009-10-14 23:50:59 +0000 | [diff] [blame] | 5510 | getTemplateSpecializationKind(PrevDecl) == TSK_Undeclared || |
| 5511 | getTemplateSpecializationKind(PrevDecl) == TSK_ImplicitInstantiation)){ |
Douglas Gregor | 121dc9a | 2010-09-12 05:08:28 +0000 | [diff] [blame] | 5512 | // C++ [temp.exp.spec]p2: |
| 5513 | // An explicit specialization shall be declared in the namespace of which |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5514 | // the template is a member, or, for member templates, in the namespace |
Douglas Gregor | 121dc9a | 2010-09-12 05:08:28 +0000 | [diff] [blame] | 5515 | // of which the enclosing class or enclosing class template is a member. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5516 | // An explicit specialization of a member function, member class or |
| 5517 | // static data member of a class template shall be declared in the |
Douglas Gregor | 121dc9a | 2010-09-12 05:08:28 +0000 | [diff] [blame] | 5518 | // namespace of which the class template is a member. |
| 5519 | // |
| 5520 | // C++0x [temp.expl.spec]p2: |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5521 | // An explicit specialization shall be declared in a namespace enclosing |
Douglas Gregor | 121dc9a | 2010-09-12 05:08:28 +0000 | [diff] [blame] | 5522 | // the specialized template. |
Richard Smith | ebaf0e6 | 2011-10-18 20:49:44 +0000 | [diff] [blame] | 5523 | if (!DC->InEnclosingNamespaceSetOf(SpecializedContext)) { |
Richard Smith | 80ad52f | 2013-01-02 11:42:31 +0000 | [diff] [blame] | 5524 | bool IsCPlusPlus11Extension = DC->Encloses(SpecializedContext); |
Richard Smith | ebaf0e6 | 2011-10-18 20:49:44 +0000 | [diff] [blame] | 5525 | if (isa<TranslationUnitDecl>(SpecializedContext)) { |
Richard Smith | 80ad52f | 2013-01-02 11:42:31 +0000 | [diff] [blame] | 5526 | assert(!IsCPlusPlus11Extension && |
Richard Smith | ebaf0e6 | 2011-10-18 20:49:44 +0000 | [diff] [blame] | 5527 | "DC encloses TU but isn't in enclosing namespace set"); |
| 5528 | S.Diag(Loc, diag::err_template_spec_decl_out_of_scope_global) |
Douglas Gregor | a4d5de5 | 2010-09-12 05:24:55 +0000 | [diff] [blame] | 5529 | << EntityKind << Specialized; |
Richard Smith | ebaf0e6 | 2011-10-18 20:49:44 +0000 | [diff] [blame] | 5530 | } else if (isa<NamespaceDecl>(SpecializedContext)) { |
| 5531 | int Diag; |
Richard Smith | 80ad52f | 2013-01-02 11:42:31 +0000 | [diff] [blame] | 5532 | if (!IsCPlusPlus11Extension) |
Richard Smith | ebaf0e6 | 2011-10-18 20:49:44 +0000 | [diff] [blame] | 5533 | Diag = diag::err_template_spec_decl_out_of_scope; |
Richard Smith | 80ad52f | 2013-01-02 11:42:31 +0000 | [diff] [blame] | 5534 | else if (!S.getLangOpts().CPlusPlus11) |
Richard Smith | ebaf0e6 | 2011-10-18 20:49:44 +0000 | [diff] [blame] | 5535 | Diag = diag::ext_template_spec_decl_out_of_scope; |
| 5536 | else |
| 5537 | Diag = diag::warn_cxx98_compat_template_spec_decl_out_of_scope; |
| 5538 | S.Diag(Loc, Diag) |
| 5539 | << EntityKind << Specialized << cast<NamedDecl>(SpecializedContext); |
| 5540 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5541 | |
Douglas Gregor | 9302da6 | 2009-10-14 23:50:59 +0000 | [diff] [blame] | 5542 | S.Diag(Specialized->getLocation(), diag::note_specialized_entity); |
Richard Smith | ebaf0e6 | 2011-10-18 20:49:44 +0000 | [diff] [blame] | 5543 | ComplainedAboutScope = |
Richard Smith | 80ad52f | 2013-01-02 11:42:31 +0000 | [diff] [blame] | 5544 | !(IsCPlusPlus11Extension && S.getLangOpts().CPlusPlus11); |
Douglas Gregor | 88b7094 | 2009-02-25 22:02:03 +0000 | [diff] [blame] | 5545 | } |
Douglas Gregor | 88b7094 | 2009-02-25 22:02:03 +0000 | [diff] [blame] | 5546 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5547 | |
| 5548 | // Make sure that this redeclaration (or definition) occurs in an enclosing |
Douglas Gregor | 9302da6 | 2009-10-14 23:50:59 +0000 | [diff] [blame] | 5549 | // namespace. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5550 | // Note that HandleDeclarator() performs this check for explicit |
Douglas Gregor | d5cb876 | 2009-10-07 00:13:32 +0000 | [diff] [blame] | 5551 | // specializations of function templates, static data members, and member |
| 5552 | // functions, so we skip the check here for those kinds of entities. |
| 5553 | // FIXME: HandleDeclarator's diagnostics aren't quite as good, though. |
Douglas Gregor | 7974c3b | 2009-10-07 17:21:34 +0000 | [diff] [blame] | 5554 | // Should we refactor that check, so that it occurs later? |
| 5555 | if (!ComplainedAboutScope && !DC->Encloses(SpecializedContext) && |
Douglas Gregor | 9302da6 | 2009-10-14 23:50:59 +0000 | [diff] [blame] | 5556 | !(isa<FunctionTemplateDecl>(Specialized) || isa<VarDecl>(Specialized) || |
| 5557 | isa<FunctionDecl>(Specialized))) { |
Douglas Gregor | d5cb876 | 2009-10-07 00:13:32 +0000 | [diff] [blame] | 5558 | if (isa<TranslationUnitDecl>(SpecializedContext)) |
| 5559 | S.Diag(Loc, diag::err_template_spec_redecl_global_scope) |
| 5560 | << EntityKind << Specialized; |
| 5561 | else if (isa<NamespaceDecl>(SpecializedContext)) |
| 5562 | S.Diag(Loc, diag::err_template_spec_redecl_out_of_scope) |
| 5563 | << EntityKind << Specialized |
| 5564 | << cast<NamedDecl>(SpecializedContext); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5565 | |
Douglas Gregor | 9302da6 | 2009-10-14 23:50:59 +0000 | [diff] [blame] | 5566 | S.Diag(Specialized->getLocation(), diag::note_specialized_entity); |
Douglas Gregor | 88b7094 | 2009-02-25 22:02:03 +0000 | [diff] [blame] | 5567 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5568 | |
Douglas Gregor | d5cb876 | 2009-10-07 00:13:32 +0000 | [diff] [blame] | 5569 | // FIXME: check for specialization-after-instantiation errors and such. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5570 | |
Douglas Gregor | 88b7094 | 2009-02-25 22:02:03 +0000 | [diff] [blame] | 5571 | return false; |
| 5572 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5573 | |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 5574 | /// \brief Subroutine of Sema::CheckTemplatePartialSpecializationArgs |
Douglas Gregor | bacb949 | 2011-01-03 21:13:47 +0000 | [diff] [blame] | 5575 | /// that checks non-type template partial specialization arguments. |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 5576 | static bool CheckNonTypeTemplatePartialSpecializationArgs( |
| 5577 | Sema &S, NonTypeTemplateParmDecl *Param, const TemplateArgument *Args, |
| 5578 | unsigned NumArgs) { |
Douglas Gregor | bacb949 | 2011-01-03 21:13:47 +0000 | [diff] [blame] | 5579 | for (unsigned I = 0; I != NumArgs; ++I) { |
| 5580 | if (Args[I].getKind() == TemplateArgument::Pack) { |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 5581 | if (CheckNonTypeTemplatePartialSpecializationArgs( |
| 5582 | S, Param, Args[I].pack_begin(), Args[I].pack_size())) |
Douglas Gregor | bacb949 | 2011-01-03 21:13:47 +0000 | [diff] [blame] | 5583 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5584 | |
Douglas Gregor | e94866f | 2009-06-12 21:21:02 +0000 | [diff] [blame] | 5585 | continue; |
Douglas Gregor | bacb949 | 2011-01-03 21:13:47 +0000 | [diff] [blame] | 5586 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5587 | |
Eli Friedman | d7a6b16 | 2012-09-26 02:36:12 +0000 | [diff] [blame] | 5588 | if (Args[I].getKind() != TemplateArgument::Expression) |
Douglas Gregor | e94866f | 2009-06-12 21:21:02 +0000 | [diff] [blame] | 5589 | continue; |
Eli Friedman | d7a6b16 | 2012-09-26 02:36:12 +0000 | [diff] [blame] | 5590 | |
| 5591 | Expr *ArgExpr = Args[I].getAsExpr(); |
Douglas Gregor | e94866f | 2009-06-12 21:21:02 +0000 | [diff] [blame] | 5592 | |
Douglas Gregor | 7a21fd4 | 2011-01-03 21:37:45 +0000 | [diff] [blame] | 5593 | // We can have a pack expansion of any of the bullets below. |
Douglas Gregor | bacb949 | 2011-01-03 21:13:47 +0000 | [diff] [blame] | 5594 | if (PackExpansionExpr *Expansion = dyn_cast<PackExpansionExpr>(ArgExpr)) |
| 5595 | ArgExpr = Expansion->getPattern(); |
Douglas Gregor | 54c53cc | 2011-01-04 23:35:54 +0000 | [diff] [blame] | 5596 | |
| 5597 | // Strip off any implicit casts we added as part of type checking. |
| 5598 | while (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(ArgExpr)) |
| 5599 | ArgExpr = ICE->getSubExpr(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5600 | |
Douglas Gregor | e94866f | 2009-06-12 21:21:02 +0000 | [diff] [blame] | 5601 | // C++ [temp.class.spec]p8: |
| 5602 | // A non-type argument is non-specialized if it is the name of a |
| 5603 | // non-type parameter. All other non-type arguments are |
| 5604 | // specialized. |
| 5605 | // |
| 5606 | // Below, we check the two conditions that only apply to |
| 5607 | // specialized non-type arguments, so skip any non-specialized |
| 5608 | // arguments. |
| 5609 | if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ArgExpr)) |
Douglas Gregor | 54c53cc | 2011-01-04 23:35:54 +0000 | [diff] [blame] | 5610 | if (isa<NonTypeTemplateParmDecl>(DRE->getDecl())) |
Douglas Gregor | e94866f | 2009-06-12 21:21:02 +0000 | [diff] [blame] | 5611 | continue; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5612 | |
Douglas Gregor | e94866f | 2009-06-12 21:21:02 +0000 | [diff] [blame] | 5613 | // C++ [temp.class.spec]p9: |
| 5614 | // Within the argument list of a class template partial |
| 5615 | // specialization, the following restrictions apply: |
| 5616 | // -- A partially specialized non-type argument expression |
| 5617 | // shall not involve a template parameter of the partial |
| 5618 | // specialization except when the argument expression is a |
| 5619 | // simple identifier. |
| 5620 | if (ArgExpr->isTypeDependent() || ArgExpr->isValueDependent()) { |
Douglas Gregor | bacb949 | 2011-01-03 21:13:47 +0000 | [diff] [blame] | 5621 | S.Diag(ArgExpr->getLocStart(), |
Douglas Gregor | e94866f | 2009-06-12 21:21:02 +0000 | [diff] [blame] | 5622 | diag::err_dependent_non_type_arg_in_partial_spec) |
| 5623 | << ArgExpr->getSourceRange(); |
| 5624 | return true; |
| 5625 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5626 | |
Douglas Gregor | e94866f | 2009-06-12 21:21:02 +0000 | [diff] [blame] | 5627 | // -- The type of a template parameter corresponding to a |
| 5628 | // specialized non-type argument shall not be dependent on a |
| 5629 | // parameter of the specialization. |
| 5630 | if (Param->getType()->isDependentType()) { |
Douglas Gregor | bacb949 | 2011-01-03 21:13:47 +0000 | [diff] [blame] | 5631 | S.Diag(ArgExpr->getLocStart(), |
Douglas Gregor | e94866f | 2009-06-12 21:21:02 +0000 | [diff] [blame] | 5632 | diag::err_dependent_typed_non_type_arg_in_partial_spec) |
| 5633 | << Param->getType() |
| 5634 | << ArgExpr->getSourceRange(); |
Douglas Gregor | bacb949 | 2011-01-03 21:13:47 +0000 | [diff] [blame] | 5635 | S.Diag(Param->getLocation(), diag::note_template_param_here); |
Douglas Gregor | e94866f | 2009-06-12 21:21:02 +0000 | [diff] [blame] | 5636 | return true; |
| 5637 | } |
| 5638 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5639 | |
Douglas Gregor | bacb949 | 2011-01-03 21:13:47 +0000 | [diff] [blame] | 5640 | return false; |
| 5641 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5642 | |
Douglas Gregor | bacb949 | 2011-01-03 21:13:47 +0000 | [diff] [blame] | 5643 | /// \brief Check the non-type template arguments of a class template |
| 5644 | /// partial specialization according to C++ [temp.class.spec]p9. |
| 5645 | /// |
| 5646 | /// \param TemplateParams the template parameters of the primary class |
| 5647 | /// template. |
| 5648 | /// |
James Dennett | 1dfbd92 | 2012-06-14 21:40:34 +0000 | [diff] [blame] | 5649 | /// \param TemplateArgs the template arguments of the class template |
Douglas Gregor | bacb949 | 2011-01-03 21:13:47 +0000 | [diff] [blame] | 5650 | /// partial specialization. |
| 5651 | /// |
| 5652 | /// \returns true if there was an error, false otherwise. |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 5653 | static bool CheckTemplatePartialSpecializationArgs( |
| 5654 | Sema &S, TemplateParameterList *TemplateParams, |
| 5655 | SmallVectorImpl<TemplateArgument> &TemplateArgs) { |
Douglas Gregor | bacb949 | 2011-01-03 21:13:47 +0000 | [diff] [blame] | 5656 | const TemplateArgument *ArgList = TemplateArgs.data(); |
| 5657 | |
| 5658 | for (unsigned I = 0, N = TemplateParams->size(); I != N; ++I) { |
| 5659 | NonTypeTemplateParmDecl *Param |
| 5660 | = dyn_cast<NonTypeTemplateParmDecl>(TemplateParams->getParam(I)); |
| 5661 | if (!Param) |
| 5662 | continue; |
| 5663 | |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 5664 | if (CheckNonTypeTemplatePartialSpecializationArgs(S, Param, &ArgList[I], 1)) |
Douglas Gregor | bacb949 | 2011-01-03 21:13:47 +0000 | [diff] [blame] | 5665 | return true; |
| 5666 | } |
Douglas Gregor | e94866f | 2009-06-12 21:21:02 +0000 | [diff] [blame] | 5667 | |
| 5668 | return false; |
| 5669 | } |
| 5670 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 5671 | DeclResult |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 5672 | Sema::ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, |
| 5673 | TagUseKind TUK, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5674 | SourceLocation KWLoc, |
Douglas Gregor | d023aec | 2011-09-09 20:53:38 +0000 | [diff] [blame] | 5675 | SourceLocation ModulePrivateLoc, |
Jeffrey Yasskin | 9ab1454 | 2010-04-08 16:38:48 +0000 | [diff] [blame] | 5676 | CXXScopeSpec &SS, |
Douglas Gregor | 7532dc6 | 2009-03-30 22:58:21 +0000 | [diff] [blame] | 5677 | TemplateTy TemplateD, |
Douglas Gregor | cc63668 | 2009-02-17 23:15:12 +0000 | [diff] [blame] | 5678 | SourceLocation TemplateNameLoc, |
| 5679 | SourceLocation LAngleLoc, |
Douglas Gregor | 40808ce | 2009-03-09 23:48:35 +0000 | [diff] [blame] | 5680 | ASTTemplateArgsPtr TemplateArgsIn, |
Douglas Gregor | cc63668 | 2009-02-17 23:15:12 +0000 | [diff] [blame] | 5681 | SourceLocation RAngleLoc, |
| 5682 | AttributeList *Attr, |
| 5683 | MultiTemplateParamsArg TemplateParameterLists) { |
Douglas Gregor | fc9cd61 | 2009-09-26 20:57:03 +0000 | [diff] [blame] | 5684 | assert(TUK != TUK_Reference && "References are not specializations"); |
John McCall | f1bbbb4 | 2009-09-04 01:14:41 +0000 | [diff] [blame] | 5685 | |
Abramo Bagnara | 7f0a915 | 2011-03-18 15:16:37 +0000 | [diff] [blame] | 5686 | // NOTE: KWLoc is the location of the tag keyword. This will instead |
| 5687 | // store the location of the outermost template keyword in the declaration. |
| 5688 | SourceLocation TemplateKWLoc = TemplateParameterLists.size() > 0 |
Benjamin Kramer | 3fe198b | 2012-08-23 21:35:17 +0000 | [diff] [blame] | 5689 | ? TemplateParameterLists[0]->getTemplateLoc() : SourceLocation(); |
Abramo Bagnara | 7f0a915 | 2011-03-18 15:16:37 +0000 | [diff] [blame] | 5690 | |
Douglas Gregor | cc63668 | 2009-02-17 23:15:12 +0000 | [diff] [blame] | 5691 | // Find the class template we're specializing |
Serge Pavlov | 1806239 | 2013-08-27 13:15:56 +0000 | [diff] [blame] | 5692 | TemplateName Name = TemplateD.get(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5693 | ClassTemplateDecl *ClassTemplate |
Douglas Gregor | 8b13c08 | 2009-11-12 00:46:20 +0000 | [diff] [blame] | 5694 | = dyn_cast_or_null<ClassTemplateDecl>(Name.getAsTemplateDecl()); |
| 5695 | |
| 5696 | if (!ClassTemplate) { |
| 5697 | Diag(TemplateNameLoc, diag::err_not_class_template_specialization) |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5698 | << (Name.getAsTemplateDecl() && |
Douglas Gregor | 8b13c08 | 2009-11-12 00:46:20 +0000 | [diff] [blame] | 5699 | isa<TemplateTemplateParmDecl>(Name.getAsTemplateDecl())); |
| 5700 | return true; |
| 5701 | } |
Douglas Gregor | cc63668 | 2009-02-17 23:15:12 +0000 | [diff] [blame] | 5702 | |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 5703 | bool isExplicitSpecialization = false; |
Douglas Gregor | c8ab256 | 2009-05-31 09:31:02 +0000 | [diff] [blame] | 5704 | bool isPartialSpecialization = false; |
| 5705 | |
Douglas Gregor | 88b7094 | 2009-02-25 22:02:03 +0000 | [diff] [blame] | 5706 | // Check the validity of the template headers that introduce this |
| 5707 | // template. |
Douglas Gregor | fc9cd61 | 2009-09-26 20:57:03 +0000 | [diff] [blame] | 5708 | // FIXME: We probably shouldn't complain about these headers for |
| 5709 | // friend declarations. |
Douglas Gregor | 0167f3c | 2010-07-14 23:14:12 +0000 | [diff] [blame] | 5710 | bool Invalid = false; |
Robert Wilhelm | 1169e2f | 2013-07-21 15:20:44 +0000 | [diff] [blame] | 5711 | TemplateParameterList *TemplateParams = |
| 5712 | MatchTemplateParametersToScopeSpecifier( |
| 5713 | TemplateNameLoc, TemplateNameLoc, SS, TemplateParameterLists, |
| 5714 | TUK == TUK_Friend, isExplicitSpecialization, Invalid); |
Douglas Gregor | 0167f3c | 2010-07-14 23:14:12 +0000 | [diff] [blame] | 5715 | if (Invalid) |
| 5716 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5717 | |
Douglas Gregor | 05396e2 | 2009-08-25 17:23:04 +0000 | [diff] [blame] | 5718 | if (TemplateParams && TemplateParams->size() > 0) { |
| 5719 | isPartialSpecialization = true; |
Douglas Gregor | 88b7094 | 2009-02-25 22:02:03 +0000 | [diff] [blame] | 5720 | |
Douglas Gregor | b0ee93c | 2010-12-21 08:14:57 +0000 | [diff] [blame] | 5721 | if (TUK == TUK_Friend) { |
| 5722 | Diag(KWLoc, diag::err_partial_specialization_friend) |
| 5723 | << SourceRange(LAngleLoc, RAngleLoc); |
| 5724 | return true; |
| 5725 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5726 | |
Douglas Gregor | 05396e2 | 2009-08-25 17:23:04 +0000 | [diff] [blame] | 5727 | // C++ [temp.class.spec]p10: |
| 5728 | // The template parameter list of a specialization shall not |
| 5729 | // contain default template argument values. |
| 5730 | for (unsigned I = 0, N = TemplateParams->size(); I != N; ++I) { |
| 5731 | Decl *Param = TemplateParams->getParam(I); |
| 5732 | if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(Param)) { |
| 5733 | if (TTP->hasDefaultArgument()) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5734 | Diag(TTP->getDefaultArgumentLoc(), |
Douglas Gregor | 05396e2 | 2009-08-25 17:23:04 +0000 | [diff] [blame] | 5735 | diag::err_default_arg_in_partial_spec); |
John McCall | 833ca99 | 2009-10-29 08:12:44 +0000 | [diff] [blame] | 5736 | TTP->removeDefaultArgument(); |
Douglas Gregor | 05396e2 | 2009-08-25 17:23:04 +0000 | [diff] [blame] | 5737 | } |
| 5738 | } else if (NonTypeTemplateParmDecl *NTTP |
| 5739 | = dyn_cast<NonTypeTemplateParmDecl>(Param)) { |
| 5740 | if (Expr *DefArg = NTTP->getDefaultArgument()) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5741 | Diag(NTTP->getDefaultArgumentLoc(), |
Douglas Gregor | 05396e2 | 2009-08-25 17:23:04 +0000 | [diff] [blame] | 5742 | diag::err_default_arg_in_partial_spec) |
| 5743 | << DefArg->getSourceRange(); |
Abramo Bagnara | d92f7a2 | 2010-06-09 09:26:05 +0000 | [diff] [blame] | 5744 | NTTP->removeDefaultArgument(); |
Douglas Gregor | 05396e2 | 2009-08-25 17:23:04 +0000 | [diff] [blame] | 5745 | } |
| 5746 | } else { |
| 5747 | TemplateTemplateParmDecl *TTP = cast<TemplateTemplateParmDecl>(Param); |
Douglas Gregor | 788cd06 | 2009-11-11 01:00:40 +0000 | [diff] [blame] | 5748 | if (TTP->hasDefaultArgument()) { |
| 5749 | Diag(TTP->getDefaultArgument().getLocation(), |
Douglas Gregor | 05396e2 | 2009-08-25 17:23:04 +0000 | [diff] [blame] | 5750 | diag::err_default_arg_in_partial_spec) |
Douglas Gregor | 788cd06 | 2009-11-11 01:00:40 +0000 | [diff] [blame] | 5751 | << TTP->getDefaultArgument().getSourceRange(); |
Abramo Bagnara | d92f7a2 | 2010-06-09 09:26:05 +0000 | [diff] [blame] | 5752 | TTP->removeDefaultArgument(); |
Douglas Gregor | ba1ecb5 | 2009-06-12 19:43:02 +0000 | [diff] [blame] | 5753 | } |
| 5754 | } |
| 5755 | } |
Douglas Gregor | a735b20 | 2009-10-13 14:39:41 +0000 | [diff] [blame] | 5756 | } else if (TemplateParams) { |
| 5757 | if (TUK == TUK_Friend) |
| 5758 | Diag(KWLoc, diag::err_template_spec_friend) |
Douglas Gregor | 849b243 | 2010-03-31 17:46:05 +0000 | [diff] [blame] | 5759 | << FixItHint::CreateRemoval( |
Douglas Gregor | a735b20 | 2009-10-13 14:39:41 +0000 | [diff] [blame] | 5760 | SourceRange(TemplateParams->getTemplateLoc(), |
| 5761 | TemplateParams->getRAngleLoc())) |
| 5762 | << SourceRange(LAngleLoc, RAngleLoc); |
| 5763 | else |
| 5764 | isExplicitSpecialization = true; |
| 5765 | } else if (TUK != TUK_Friend) { |
Douglas Gregor | 05396e2 | 2009-08-25 17:23:04 +0000 | [diff] [blame] | 5766 | Diag(KWLoc, diag::err_template_spec_needs_header) |
Douglas Gregor | 849b243 | 2010-03-31 17:46:05 +0000 | [diff] [blame] | 5767 | << FixItHint::CreateInsertion(KWLoc, "template<> "); |
Argyrios Kyrtzidis | d62d901 | 2013-06-05 17:52:24 +0000 | [diff] [blame] | 5768 | TemplateKWLoc = KWLoc; |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 5769 | isExplicitSpecialization = true; |
| 5770 | } |
Douglas Gregor | 88b7094 | 2009-02-25 22:02:03 +0000 | [diff] [blame] | 5771 | |
Douglas Gregor | cc63668 | 2009-02-17 23:15:12 +0000 | [diff] [blame] | 5772 | // Check that the specialization uses the same tag kind as the |
| 5773 | // original template. |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 5774 | TagTypeKind Kind = TypeWithKeyword::getTagTypeKindForTypeSpec(TagSpec); |
| 5775 | assert(Kind != TTK_Enum && "Invalid enum tag in class template spec!"); |
Douglas Gregor | 501c5ce | 2009-05-14 16:41:31 +0000 | [diff] [blame] | 5776 | if (!isAcceptableTagRedeclaration(ClassTemplate->getTemplatedDecl(), |
Richard Trieu | bbf34c0 | 2011-06-10 03:11:26 +0000 | [diff] [blame] | 5777 | Kind, TUK == TUK_Definition, KWLoc, |
Douglas Gregor | 501c5ce | 2009-05-14 16:41:31 +0000 | [diff] [blame] | 5778 | *ClassTemplate->getIdentifier())) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5779 | Diag(KWLoc, diag::err_use_with_wrong_tag) |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 5780 | << ClassTemplate |
Douglas Gregor | 849b243 | 2010-03-31 17:46:05 +0000 | [diff] [blame] | 5781 | << FixItHint::CreateReplacement(KWLoc, |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 5782 | ClassTemplate->getTemplatedDecl()->getKindName()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5783 | Diag(ClassTemplate->getTemplatedDecl()->getLocation(), |
Douglas Gregor | cc63668 | 2009-02-17 23:15:12 +0000 | [diff] [blame] | 5784 | diag::note_previous_use); |
| 5785 | Kind = ClassTemplate->getTemplatedDecl()->getTagKind(); |
| 5786 | } |
| 5787 | |
Douglas Gregor | 40808ce | 2009-03-09 23:48:35 +0000 | [diff] [blame] | 5788 | // Translate the parser's template argument list in our AST format. |
John McCall | d5532b6 | 2009-11-23 01:53:49 +0000 | [diff] [blame] | 5789 | TemplateArgumentListInfo TemplateArgs; |
| 5790 | TemplateArgs.setLAngleLoc(LAngleLoc); |
| 5791 | TemplateArgs.setRAngleLoc(RAngleLoc); |
Douglas Gregor | 314b97f | 2009-11-10 19:49:08 +0000 | [diff] [blame] | 5792 | translateTemplateArguments(TemplateArgsIn, TemplateArgs); |
Douglas Gregor | 40808ce | 2009-03-09 23:48:35 +0000 | [diff] [blame] | 5793 | |
Douglas Gregor | 925910d | 2011-01-03 20:35:03 +0000 | [diff] [blame] | 5794 | // Check for unexpanded parameter packs in any of the template arguments. |
| 5795 | for (unsigned I = 0, N = TemplateArgs.size(); I != N; ++I) |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5796 | if (DiagnoseUnexpandedParameterPack(TemplateArgs[I], |
Douglas Gregor | 925910d | 2011-01-03 20:35:03 +0000 | [diff] [blame] | 5797 | UPPC_PartialSpecialization)) |
| 5798 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5799 | |
Douglas Gregor | cc63668 | 2009-02-17 23:15:12 +0000 | [diff] [blame] | 5800 | // Check that the template argument list is well-formed for this |
| 5801 | // template. |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 5802 | SmallVector<TemplateArgument, 4> Converted; |
John McCall | d5532b6 | 2009-11-23 01:53:49 +0000 | [diff] [blame] | 5803 | if (CheckTemplateArgumentList(ClassTemplate, TemplateNameLoc, |
| 5804 | TemplateArgs, false, Converted)) |
Douglas Gregor | 212e81c | 2009-03-25 00:13:59 +0000 | [diff] [blame] | 5805 | return true; |
Douglas Gregor | cc63668 | 2009-02-17 23:15:12 +0000 | [diff] [blame] | 5806 | |
Douglas Gregor | c8ab256 | 2009-05-31 09:31:02 +0000 | [diff] [blame] | 5807 | // Find the class template (partial) specialization declaration that |
Douglas Gregor | cc63668 | 2009-02-17 23:15:12 +0000 | [diff] [blame] | 5808 | // corresponds to these arguments. |
Douglas Gregor | ba1ecb5 | 2009-06-12 19:43:02 +0000 | [diff] [blame] | 5809 | if (isPartialSpecialization) { |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 5810 | if (CheckTemplatePartialSpecializationArgs( |
| 5811 | *this, ClassTemplate->getTemplateParameters(), Converted)) |
Douglas Gregor | e94866f | 2009-06-12 21:21:02 +0000 | [diff] [blame] | 5812 | return true; |
| 5813 | |
Douglas Gregor | 561f812 | 2011-07-01 01:22:09 +0000 | [diff] [blame] | 5814 | bool InstantiationDependent; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5815 | if (!Name.isDependent() && |
Douglas Gregor | de09096 | 2010-02-09 00:37:32 +0000 | [diff] [blame] | 5816 | !TemplateSpecializationType::anyDependentTemplateArguments( |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5817 | TemplateArgs.getArgumentArray(), |
Douglas Gregor | 561f812 | 2011-07-01 01:22:09 +0000 | [diff] [blame] | 5818 | TemplateArgs.size(), |
| 5819 | InstantiationDependent)) { |
Douglas Gregor | de09096 | 2010-02-09 00:37:32 +0000 | [diff] [blame] | 5820 | Diag(TemplateNameLoc, diag::err_partial_spec_fully_specialized) |
| 5821 | << ClassTemplate->getDeclName(); |
| 5822 | isPartialSpecialization = false; |
Douglas Gregor | de09096 | 2010-02-09 00:37:32 +0000 | [diff] [blame] | 5823 | } |
| 5824 | } |
Argyrios Kyrtzidis | cc0b1bc | 2010-07-20 13:59:28 +0000 | [diff] [blame] | 5825 | |
Douglas Gregor | cc63668 | 2009-02-17 23:15:12 +0000 | [diff] [blame] | 5826 | void *InsertPos = 0; |
Douglas Gregor | c8ab256 | 2009-05-31 09:31:02 +0000 | [diff] [blame] | 5827 | ClassTemplateSpecializationDecl *PrevDecl = 0; |
| 5828 | |
| 5829 | if (isPartialSpecialization) |
Argyrios Kyrtzidis | cc0b1bc | 2010-07-20 13:59:28 +0000 | [diff] [blame] | 5830 | // FIXME: Template parameter list matters, too |
Douglas Gregor | c8ab256 | 2009-05-31 09:31:02 +0000 | [diff] [blame] | 5831 | PrevDecl |
Douglas Gregor | 910f800 | 2010-11-07 23:05:16 +0000 | [diff] [blame] | 5832 | = ClassTemplate->findPartialSpecialization(Converted.data(), |
| 5833 | Converted.size(), |
Argyrios Kyrtzidis | cc0b1bc | 2010-07-20 13:59:28 +0000 | [diff] [blame] | 5834 | InsertPos); |
Douglas Gregor | c8ab256 | 2009-05-31 09:31:02 +0000 | [diff] [blame] | 5835 | else |
| 5836 | PrevDecl |
Douglas Gregor | 910f800 | 2010-11-07 23:05:16 +0000 | [diff] [blame] | 5837 | = ClassTemplate->findSpecialization(Converted.data(), |
| 5838 | Converted.size(), InsertPos); |
Douglas Gregor | cc63668 | 2009-02-17 23:15:12 +0000 | [diff] [blame] | 5839 | |
| 5840 | ClassTemplateSpecializationDecl *Specialization = 0; |
| 5841 | |
Douglas Gregor | 88b7094 | 2009-02-25 22:02:03 +0000 | [diff] [blame] | 5842 | // Check whether we can declare a class template specialization in |
| 5843 | // the current scope. |
Douglas Gregor | fc9cd61 | 2009-09-26 20:57:03 +0000 | [diff] [blame] | 5844 | if (TUK != TUK_Friend && |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5845 | CheckTemplateSpecializationScope(*this, ClassTemplate, PrevDecl, |
| 5846 | TemplateNameLoc, |
Douglas Gregor | 9302da6 | 2009-10-14 23:50:59 +0000 | [diff] [blame] | 5847 | isPartialSpecialization)) |
Douglas Gregor | 212e81c | 2009-03-25 00:13:59 +0000 | [diff] [blame] | 5848 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5849 | |
Douglas Gregor | b88e888 | 2009-07-30 17:40:51 +0000 | [diff] [blame] | 5850 | // The canonical type |
| 5851 | QualType CanonType; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5852 | if (PrevDecl && |
Douglas Gregor | fc9cd61 | 2009-09-26 20:57:03 +0000 | [diff] [blame] | 5853 | (PrevDecl->getSpecializationKind() == TSK_Undeclared || |
Douglas Gregor | de09096 | 2010-02-09 00:37:32 +0000 | [diff] [blame] | 5854 | TUK == TUK_Friend)) { |
Douglas Gregor | cc63668 | 2009-02-17 23:15:12 +0000 | [diff] [blame] | 5855 | // Since the only prior class template specialization with these |
Douglas Gregor | fc9cd61 | 2009-09-26 20:57:03 +0000 | [diff] [blame] | 5856 | // arguments was referenced but not declared, or we're only |
| 5857 | // referencing this specialization as a friend, reuse that |
Abramo Bagnara | 7f0a915 | 2011-03-18 15:16:37 +0000 | [diff] [blame] | 5858 | // declaration node as our own, updating its source location and |
| 5859 | // the list of outer template parameters to reflect our new declaration. |
Douglas Gregor | cc63668 | 2009-02-17 23:15:12 +0000 | [diff] [blame] | 5860 | Specialization = PrevDecl; |
Douglas Gregor | 6bc9f7e | 2009-02-25 22:18:32 +0000 | [diff] [blame] | 5861 | Specialization->setLocation(TemplateNameLoc); |
Abramo Bagnara | 7f0a915 | 2011-03-18 15:16:37 +0000 | [diff] [blame] | 5862 | if (TemplateParameterLists.size() > 0) { |
| 5863 | Specialization->setTemplateParameterListsInfo(Context, |
| 5864 | TemplateParameterLists.size(), |
Benjamin Kramer | 5354e77 | 2012-08-23 23:38:35 +0000 | [diff] [blame] | 5865 | TemplateParameterLists.data()); |
Abramo Bagnara | 7f0a915 | 2011-03-18 15:16:37 +0000 | [diff] [blame] | 5866 | } |
Douglas Gregor | cc63668 | 2009-02-17 23:15:12 +0000 | [diff] [blame] | 5867 | PrevDecl = 0; |
Douglas Gregor | b88e888 | 2009-07-30 17:40:51 +0000 | [diff] [blame] | 5868 | CanonType = Context.getTypeDeclType(Specialization); |
Douglas Gregor | c8ab256 | 2009-05-31 09:31:02 +0000 | [diff] [blame] | 5869 | } else if (isPartialSpecialization) { |
Douglas Gregor | b88e888 | 2009-07-30 17:40:51 +0000 | [diff] [blame] | 5870 | // Build the canonical type that describes the converted template |
| 5871 | // arguments of the class template partial specialization. |
Douglas Gregor | de09096 | 2010-02-09 00:37:32 +0000 | [diff] [blame] | 5872 | TemplateName CanonTemplate = Context.getCanonicalTemplateName(Name); |
| 5873 | CanonType = Context.getTemplateSpecializationType(CanonTemplate, |
Douglas Gregor | b9c6631 | 2010-12-23 17:13:55 +0000 | [diff] [blame] | 5874 | Converted.data(), |
| 5875 | Converted.size()); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5876 | |
| 5877 | if (Context.hasSameType(CanonType, |
Douglas Gregor | b9c6631 | 2010-12-23 17:13:55 +0000 | [diff] [blame] | 5878 | ClassTemplate->getInjectedClassNameSpecialization())) { |
| 5879 | // C++ [temp.class.spec]p9b3: |
| 5880 | // |
| 5881 | // -- The argument list of the specialization shall not be identical |
| 5882 | // to the implicit argument list of the primary template. |
| 5883 | Diag(TemplateNameLoc, diag::err_partial_spec_args_match_primary_template) |
Douglas Gregor | 8d267c5 | 2011-09-09 02:06:17 +0000 | [diff] [blame] | 5884 | << (TUK == TUK_Definition) |
| 5885 | << FixItHint::CreateRemoval(SourceRange(LAngleLoc, RAngleLoc)); |
Douglas Gregor | b9c6631 | 2010-12-23 17:13:55 +0000 | [diff] [blame] | 5886 | return CheckClassTemplate(S, TagSpec, TUK, KWLoc, SS, |
| 5887 | ClassTemplate->getIdentifier(), |
| 5888 | TemplateNameLoc, |
| 5889 | Attr, |
| 5890 | TemplateParams, |
Douglas Gregor | e761230 | 2011-09-09 19:05:14 +0000 | [diff] [blame] | 5891 | AS_none, /*ModulePrivateLoc=*/SourceLocation(), |
Abramo Bagnara | 7f0a915 | 2011-03-18 15:16:37 +0000 | [diff] [blame] | 5892 | TemplateParameterLists.size() - 1, |
Benjamin Kramer | 5354e77 | 2012-08-23 23:38:35 +0000 | [diff] [blame] | 5893 | TemplateParameterLists.data()); |
Douglas Gregor | b9c6631 | 2010-12-23 17:13:55 +0000 | [diff] [blame] | 5894 | } |
Douglas Gregor | b88e888 | 2009-07-30 17:40:51 +0000 | [diff] [blame] | 5895 | |
Douglas Gregor | c8ab256 | 2009-05-31 09:31:02 +0000 | [diff] [blame] | 5896 | // Create a new class template partial specialization declaration node. |
Douglas Gregor | c8ab256 | 2009-05-31 09:31:02 +0000 | [diff] [blame] | 5897 | ClassTemplatePartialSpecializationDecl *PrevPartial |
| 5898 | = cast_or_null<ClassTemplatePartialSpecializationDecl>(PrevDecl); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5899 | ClassTemplatePartialSpecializationDecl *Partial |
Douglas Gregor | 13c8577 | 2010-05-06 00:28:52 +0000 | [diff] [blame] | 5900 | = ClassTemplatePartialSpecializationDecl::Create(Context, Kind, |
Douglas Gregor | c8ab256 | 2009-05-31 09:31:02 +0000 | [diff] [blame] | 5901 | ClassTemplate->getDeclContext(), |
Abramo Bagnara | ba877ad | 2011-03-09 14:09:51 +0000 | [diff] [blame] | 5902 | KWLoc, TemplateNameLoc, |
Anders Carlsson | 91fdf6f | 2009-06-05 04:06:48 +0000 | [diff] [blame] | 5903 | TemplateParams, |
| 5904 | ClassTemplate, |
Douglas Gregor | 910f800 | 2010-11-07 23:05:16 +0000 | [diff] [blame] | 5905 | Converted.data(), |
| 5906 | Converted.size(), |
John McCall | d5532b6 | 2009-11-23 01:53:49 +0000 | [diff] [blame] | 5907 | TemplateArgs, |
John McCall | 3cb0ebd | 2010-03-10 03:28:59 +0000 | [diff] [blame] | 5908 | CanonType, |
Richard Smith | 37fd27d | 2013-08-22 23:27:37 +0000 | [diff] [blame] | 5909 | PrevPartial); |
John McCall | b621766 | 2010-03-15 10:12:16 +0000 | [diff] [blame] | 5910 | SetNestedNameSpecifier(Partial, SS); |
Abramo Bagnara | 7f0a915 | 2011-03-18 15:16:37 +0000 | [diff] [blame] | 5911 | if (TemplateParameterLists.size() > 1 && SS.isSet()) { |
Douglas Gregor | c722ea4 | 2010-06-15 17:44:38 +0000 | [diff] [blame] | 5912 | Partial->setTemplateParameterListsInfo(Context, |
Abramo Bagnara | 7f0a915 | 2011-03-18 15:16:37 +0000 | [diff] [blame] | 5913 | TemplateParameterLists.size() - 1, |
Benjamin Kramer | 5354e77 | 2012-08-23 23:38:35 +0000 | [diff] [blame] | 5914 | TemplateParameterLists.data()); |
Abramo Bagnara | 9b93488 | 2010-06-12 08:15:14 +0000 | [diff] [blame] | 5915 | } |
Douglas Gregor | c8ab256 | 2009-05-31 09:31:02 +0000 | [diff] [blame] | 5916 | |
Argyrios Kyrtzidis | cc0b1bc | 2010-07-20 13:59:28 +0000 | [diff] [blame] | 5917 | if (!PrevPartial) |
| 5918 | ClassTemplate->AddPartialSpecialization(Partial, InsertPos); |
Douglas Gregor | c8ab256 | 2009-05-31 09:31:02 +0000 | [diff] [blame] | 5919 | Specialization = Partial; |
Douglas Gregor | 031a588 | 2009-06-13 00:26:55 +0000 | [diff] [blame] | 5920 | |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5921 | // If we are providing an explicit specialization of a member class |
Douglas Gregor | ed9c0f9 | 2009-10-29 00:04:11 +0000 | [diff] [blame] | 5922 | // template specialization, make a note of that. |
| 5923 | if (PrevPartial && PrevPartial->getInstantiatedFromMember()) |
| 5924 | PrevPartial->setMemberSpecialization(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5925 | |
Douglas Gregor | 031a588 | 2009-06-13 00:26:55 +0000 | [diff] [blame] | 5926 | // Check that all of the template parameters of the class template |
| 5927 | // partial specialization are deducible from the template |
| 5928 | // arguments. If not, this class template partial specialization |
| 5929 | // will never be used. |
Benjamin Kramer | 013b366 | 2012-01-30 16:17:39 +0000 | [diff] [blame] | 5930 | llvm::SmallBitVector DeducibleParams(TemplateParams->size()); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5931 | MarkUsedTemplateParameters(Partial->getTemplateArgs(), true, |
Douglas Gregor | ed9c0f9 | 2009-10-29 00:04:11 +0000 | [diff] [blame] | 5932 | TemplateParams->getDepth(), |
Douglas Gregor | e73bb60 | 2009-09-14 21:25:05 +0000 | [diff] [blame] | 5933 | DeducibleParams); |
Douglas Gregor | 031a588 | 2009-06-13 00:26:55 +0000 | [diff] [blame] | 5934 | |
Benjamin Kramer | 013b366 | 2012-01-30 16:17:39 +0000 | [diff] [blame] | 5935 | if (!DeducibleParams.all()) { |
| 5936 | unsigned NumNonDeducible = DeducibleParams.size()-DeducibleParams.count(); |
Douglas Gregor | 031a588 | 2009-06-13 00:26:55 +0000 | [diff] [blame] | 5937 | Diag(TemplateNameLoc, diag::warn_partial_specs_not_deducible) |
| 5938 | << (NumNonDeducible > 1) |
| 5939 | << SourceRange(TemplateNameLoc, RAngleLoc); |
| 5940 | for (unsigned I = 0, N = DeducibleParams.size(); I != N; ++I) { |
| 5941 | if (!DeducibleParams[I]) { |
| 5942 | NamedDecl *Param = cast<NamedDecl>(TemplateParams->getParam(I)); |
| 5943 | if (Param->getDeclName()) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5944 | Diag(Param->getLocation(), |
Douglas Gregor | 031a588 | 2009-06-13 00:26:55 +0000 | [diff] [blame] | 5945 | diag::note_partial_spec_unused_parameter) |
| 5946 | << Param->getDeclName(); |
| 5947 | else |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5948 | Diag(Param->getLocation(), |
Douglas Gregor | 031a588 | 2009-06-13 00:26:55 +0000 | [diff] [blame] | 5949 | diag::note_partial_spec_unused_parameter) |
Benjamin Kramer | 476d8b8 | 2010-08-11 14:47:12 +0000 | [diff] [blame] | 5950 | << "<anonymous>"; |
Douglas Gregor | 031a588 | 2009-06-13 00:26:55 +0000 | [diff] [blame] | 5951 | } |
| 5952 | } |
| 5953 | } |
Douglas Gregor | cc63668 | 2009-02-17 23:15:12 +0000 | [diff] [blame] | 5954 | } else { |
| 5955 | // Create a new class template specialization declaration node for |
Douglas Gregor | fc9cd61 | 2009-09-26 20:57:03 +0000 | [diff] [blame] | 5956 | // this explicit specialization or friend declaration. |
Douglas Gregor | cc63668 | 2009-02-17 23:15:12 +0000 | [diff] [blame] | 5957 | Specialization |
Douglas Gregor | 13c8577 | 2010-05-06 00:28:52 +0000 | [diff] [blame] | 5958 | = ClassTemplateSpecializationDecl::Create(Context, Kind, |
Douglas Gregor | cc63668 | 2009-02-17 23:15:12 +0000 | [diff] [blame] | 5959 | ClassTemplate->getDeclContext(), |
Abramo Bagnara | ba877ad | 2011-03-09 14:09:51 +0000 | [diff] [blame] | 5960 | KWLoc, TemplateNameLoc, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5961 | ClassTemplate, |
Douglas Gregor | 910f800 | 2010-11-07 23:05:16 +0000 | [diff] [blame] | 5962 | Converted.data(), |
| 5963 | Converted.size(), |
Douglas Gregor | cc63668 | 2009-02-17 23:15:12 +0000 | [diff] [blame] | 5964 | PrevDecl); |
John McCall | b621766 | 2010-03-15 10:12:16 +0000 | [diff] [blame] | 5965 | SetNestedNameSpecifier(Specialization, SS); |
Abramo Bagnara | 7f0a915 | 2011-03-18 15:16:37 +0000 | [diff] [blame] | 5966 | if (TemplateParameterLists.size() > 0) { |
Douglas Gregor | c722ea4 | 2010-06-15 17:44:38 +0000 | [diff] [blame] | 5967 | Specialization->setTemplateParameterListsInfo(Context, |
Abramo Bagnara | 7f0a915 | 2011-03-18 15:16:37 +0000 | [diff] [blame] | 5968 | TemplateParameterLists.size(), |
Benjamin Kramer | 5354e77 | 2012-08-23 23:38:35 +0000 | [diff] [blame] | 5969 | TemplateParameterLists.data()); |
Abramo Bagnara | 9b93488 | 2010-06-12 08:15:14 +0000 | [diff] [blame] | 5970 | } |
Douglas Gregor | cc63668 | 2009-02-17 23:15:12 +0000 | [diff] [blame] | 5971 | |
Argyrios Kyrtzidis | cc0b1bc | 2010-07-20 13:59:28 +0000 | [diff] [blame] | 5972 | if (!PrevDecl) |
| 5973 | ClassTemplate->AddSpecialization(Specialization, InsertPos); |
Douglas Gregor | b88e888 | 2009-07-30 17:40:51 +0000 | [diff] [blame] | 5974 | |
| 5975 | CanonType = Context.getTypeDeclType(Specialization); |
Douglas Gregor | cc63668 | 2009-02-17 23:15:12 +0000 | [diff] [blame] | 5976 | } |
| 5977 | |
Douglas Gregor | b3ae4fc | 2009-10-12 20:18:28 +0000 | [diff] [blame] | 5978 | // C++ [temp.expl.spec]p6: |
| 5979 | // If a template, a member template or the member of a class template is |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5980 | // explicitly specialized then that specialization shall be declared |
Douglas Gregor | b3ae4fc | 2009-10-12 20:18:28 +0000 | [diff] [blame] | 5981 | // before the first use of that specialization that would cause an implicit |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5982 | // instantiation to take place, in every translation unit in which such a |
Douglas Gregor | b3ae4fc | 2009-10-12 20:18:28 +0000 | [diff] [blame] | 5983 | // use occurs; no diagnostic is required. |
| 5984 | if (PrevDecl && PrevDecl->getPointOfInstantiation().isValid()) { |
Douglas Gregor | dc0a11c | 2010-02-26 06:03:23 +0000 | [diff] [blame] | 5985 | bool Okay = false; |
Douglas Gregor | f785a7d | 2012-01-14 15:55:47 +0000 | [diff] [blame] | 5986 | for (Decl *Prev = PrevDecl; Prev; Prev = Prev->getPreviousDecl()) { |
Douglas Gregor | dc0a11c | 2010-02-26 06:03:23 +0000 | [diff] [blame] | 5987 | // Is there any previous explicit specialization declaration? |
| 5988 | if (getTemplateSpecializationKind(Prev) == TSK_ExplicitSpecialization) { |
| 5989 | Okay = true; |
| 5990 | break; |
| 5991 | } |
| 5992 | } |
Douglas Gregor | b3ae4fc | 2009-10-12 20:18:28 +0000 | [diff] [blame] | 5993 | |
Douglas Gregor | dc0a11c | 2010-02-26 06:03:23 +0000 | [diff] [blame] | 5994 | if (!Okay) { |
| 5995 | SourceRange Range(TemplateNameLoc, RAngleLoc); |
| 5996 | Diag(TemplateNameLoc, diag::err_specialization_after_instantiation) |
| 5997 | << Context.getTypeDeclType(Specialization) << Range; |
| 5998 | |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5999 | Diag(PrevDecl->getPointOfInstantiation(), |
Douglas Gregor | dc0a11c | 2010-02-26 06:03:23 +0000 | [diff] [blame] | 6000 | diag::note_instantiation_required_here) |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6001 | << (PrevDecl->getTemplateSpecializationKind() |
Douglas Gregor | b3ae4fc | 2009-10-12 20:18:28 +0000 | [diff] [blame] | 6002 | != TSK_ImplicitInstantiation); |
Douglas Gregor | dc0a11c | 2010-02-26 06:03:23 +0000 | [diff] [blame] | 6003 | return true; |
| 6004 | } |
Douglas Gregor | b3ae4fc | 2009-10-12 20:18:28 +0000 | [diff] [blame] | 6005 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6006 | |
Douglas Gregor | fc9cd61 | 2009-09-26 20:57:03 +0000 | [diff] [blame] | 6007 | // If this is not a friend, note that this is an explicit specialization. |
| 6008 | if (TUK != TUK_Friend) |
| 6009 | Specialization->setSpecializationKind(TSK_ExplicitSpecialization); |
Douglas Gregor | cc63668 | 2009-02-17 23:15:12 +0000 | [diff] [blame] | 6010 | |
| 6011 | // Check that this isn't a redefinition of this specialization. |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 6012 | if (TUK == TUK_Definition) { |
Douglas Gregor | 952b017 | 2010-02-11 01:04:33 +0000 | [diff] [blame] | 6013 | if (RecordDecl *Def = Specialization->getDefinition()) { |
Douglas Gregor | cc63668 | 2009-02-17 23:15:12 +0000 | [diff] [blame] | 6014 | SourceRange Range(TemplateNameLoc, RAngleLoc); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6015 | Diag(TemplateNameLoc, diag::err_redefinition) |
Douglas Gregor | c8ab256 | 2009-05-31 09:31:02 +0000 | [diff] [blame] | 6016 | << Context.getTypeDeclType(Specialization) << Range; |
Douglas Gregor | cc63668 | 2009-02-17 23:15:12 +0000 | [diff] [blame] | 6017 | Diag(Def->getLocation(), diag::note_previous_definition); |
| 6018 | Specialization->setInvalidDecl(); |
Douglas Gregor | 212e81c | 2009-03-25 00:13:59 +0000 | [diff] [blame] | 6019 | return true; |
Douglas Gregor | cc63668 | 2009-02-17 23:15:12 +0000 | [diff] [blame] | 6020 | } |
| 6021 | } |
| 6022 | |
John McCall | 7f1b987 | 2010-12-18 03:30:47 +0000 | [diff] [blame] | 6023 | if (Attr) |
| 6024 | ProcessDeclAttributeList(S, Specialization, Attr); |
| 6025 | |
Richard Smith | 0652c35 | 2012-08-17 03:20:55 +0000 | [diff] [blame] | 6026 | // Add alignment attributes if necessary; these attributes are checked when |
| 6027 | // the ASTContext lays out the structure. |
| 6028 | if (TUK == TUK_Definition) { |
| 6029 | AddAlignmentAttributesForRecord(Specialization); |
| 6030 | AddMsStructLayoutForRecord(Specialization); |
| 6031 | } |
| 6032 | |
Douglas Gregor | d023aec | 2011-09-09 20:53:38 +0000 | [diff] [blame] | 6033 | if (ModulePrivateLoc.isValid()) |
| 6034 | Diag(Specialization->getLocation(), diag::err_module_private_specialization) |
| 6035 | << (isPartialSpecialization? 1 : 0) |
| 6036 | << FixItHint::CreateRemoval(ModulePrivateLoc); |
| 6037 | |
Douglas Gregor | fc705b8 | 2009-02-26 22:19:44 +0000 | [diff] [blame] | 6038 | // Build the fully-sugared type for this class template |
| 6039 | // specialization as the user wrote in the specialization |
| 6040 | // itself. This means that we'll pretty-print the type retrieved |
| 6041 | // from the specialization's declaration the way that the user |
| 6042 | // actually wrote the specialization, rather than formatting the |
| 6043 | // name based on the "canonical" representation used to store the |
| 6044 | // template arguments in the specialization. |
John McCall | 3cb0ebd | 2010-03-10 03:28:59 +0000 | [diff] [blame] | 6045 | TypeSourceInfo *WrittenTy |
| 6046 | = Context.getTemplateSpecializationTypeInfo(Name, TemplateNameLoc, |
| 6047 | TemplateArgs, CanonType); |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 6048 | if (TUK != TUK_Friend) { |
Douglas Gregor | fc9cd61 | 2009-09-26 20:57:03 +0000 | [diff] [blame] | 6049 | Specialization->setTypeAsWritten(WrittenTy); |
Abramo Bagnara | 7f0a915 | 2011-03-18 15:16:37 +0000 | [diff] [blame] | 6050 | Specialization->setTemplateKeywordLoc(TemplateKWLoc); |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 6051 | } |
Douglas Gregor | cc63668 | 2009-02-17 23:15:12 +0000 | [diff] [blame] | 6052 | |
Douglas Gregor | 6bc9f7e | 2009-02-25 22:18:32 +0000 | [diff] [blame] | 6053 | // C++ [temp.expl.spec]p9: |
| 6054 | // A template explicit specialization is in the scope of the |
| 6055 | // namespace in which the template was defined. |
| 6056 | // |
| 6057 | // We actually implement this paragraph where we set the semantic |
| 6058 | // context (in the creation of the ClassTemplateSpecializationDecl), |
| 6059 | // but we also maintain the lexical context where the actual |
| 6060 | // definition occurs. |
Douglas Gregor | cc63668 | 2009-02-17 23:15:12 +0000 | [diff] [blame] | 6061 | Specialization->setLexicalDeclContext(CurContext); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6062 | |
Douglas Gregor | cc63668 | 2009-02-17 23:15:12 +0000 | [diff] [blame] | 6063 | // We may be starting the definition of this specialization. |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 6064 | if (TUK == TUK_Definition) |
Douglas Gregor | cc63668 | 2009-02-17 23:15:12 +0000 | [diff] [blame] | 6065 | Specialization->startDefinition(); |
| 6066 | |
Douglas Gregor | fc9cd61 | 2009-09-26 20:57:03 +0000 | [diff] [blame] | 6067 | if (TUK == TUK_Friend) { |
| 6068 | FriendDecl *Friend = FriendDecl::Create(Context, CurContext, |
| 6069 | TemplateNameLoc, |
John McCall | 32f2fb5 | 2010-03-25 18:04:51 +0000 | [diff] [blame] | 6070 | WrittenTy, |
Douglas Gregor | fc9cd61 | 2009-09-26 20:57:03 +0000 | [diff] [blame] | 6071 | /*FIXME:*/KWLoc); |
| 6072 | Friend->setAccess(AS_public); |
| 6073 | CurContext->addDecl(Friend); |
| 6074 | } else { |
| 6075 | // Add the specialization into its lexical context, so that it can |
| 6076 | // be seen when iterating through the list of declarations in that |
| 6077 | // context. However, specializations are not found by name lookup. |
| 6078 | CurContext->addDecl(Specialization); |
| 6079 | } |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6080 | return Specialization; |
Douglas Gregor | cc63668 | 2009-02-17 23:15:12 +0000 | [diff] [blame] | 6081 | } |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 6082 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6083 | Decl *Sema::ActOnTemplateDeclarator(Scope *S, |
Douglas Gregor | e542c86 | 2009-06-23 23:11:28 +0000 | [diff] [blame] | 6084 | MultiTemplateParamsArg TemplateParameterLists, |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6085 | Declarator &D) { |
Benjamin Kramer | 3fe198b | 2012-08-23 21:35:17 +0000 | [diff] [blame] | 6086 | Decl *NewDecl = HandleDeclarator(S, D, TemplateParameterLists); |
Dmitri Gribenko | 96b0986 | 2012-07-31 22:37:06 +0000 | [diff] [blame] | 6087 | ActOnDocumentableDecl(NewDecl); |
| 6088 | return NewDecl; |
Douglas Gregor | e542c86 | 2009-06-23 23:11:28 +0000 | [diff] [blame] | 6089 | } |
| 6090 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6091 | Decl *Sema::ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, |
Douglas Gregor | 52591bf | 2009-06-24 00:54:41 +0000 | [diff] [blame] | 6092 | MultiTemplateParamsArg TemplateParameterLists, |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6093 | Declarator &D) { |
Douglas Gregor | 52591bf | 2009-06-24 00:54:41 +0000 | [diff] [blame] | 6094 | assert(getCurFunctionDecl() == 0 && "Function parsing confused"); |
Abramo Bagnara | 075f8f1 | 2010-12-10 16:29:40 +0000 | [diff] [blame] | 6095 | DeclaratorChunk::FunctionTypeInfo &FTI = D.getFunctionTypeInfo(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6096 | |
Douglas Gregor | 52591bf | 2009-06-24 00:54:41 +0000 | [diff] [blame] | 6097 | if (FTI.hasPrototype) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6098 | // FIXME: Diagnose arguments without names in C. |
Douglas Gregor | 52591bf | 2009-06-24 00:54:41 +0000 | [diff] [blame] | 6099 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6100 | |
Douglas Gregor | 52591bf | 2009-06-24 00:54:41 +0000 | [diff] [blame] | 6101 | Scope *ParentScope = FnBodyScope->getParent(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6102 | |
Douglas Gregor | 45fa560 | 2011-11-07 20:56:01 +0000 | [diff] [blame] | 6103 | D.setFunctionDefinitionKind(FDK_Definition); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6104 | Decl *DP = HandleDeclarator(ParentScope, D, |
Benjamin Kramer | 3fe198b | 2012-08-23 21:35:17 +0000 | [diff] [blame] | 6105 | TemplateParameterLists); |
Argyrios Kyrtzidis | 3abc768 | 2012-12-14 06:53:58 +0000 | [diff] [blame] | 6106 | return ActOnStartOfFunctionDef(FnBodyScope, DP); |
Douglas Gregor | 52591bf | 2009-06-24 00:54:41 +0000 | [diff] [blame] | 6107 | } |
| 6108 | |
John McCall | 7504239 | 2010-02-11 01:33:53 +0000 | [diff] [blame] | 6109 | /// \brief Strips various properties off an implicit instantiation |
| 6110 | /// that has just been explicitly specialized. |
| 6111 | static void StripImplicitInstantiation(NamedDecl *D) { |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 6112 | D->dropAttrs(); |
John McCall | 7504239 | 2010-02-11 01:33:53 +0000 | [diff] [blame] | 6113 | |
| 6114 | if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { |
| 6115 | FD->setInlineSpecified(false); |
Jordan Rose | 0918989 | 2013-03-08 22:25:36 +0000 | [diff] [blame] | 6116 | |
| 6117 | for (FunctionDecl::param_iterator I = FD->param_begin(), |
| 6118 | E = FD->param_end(); |
| 6119 | I != E; ++I) |
| 6120 | (*I)->dropAttrs(); |
John McCall | 7504239 | 2010-02-11 01:33:53 +0000 | [diff] [blame] | 6121 | } |
| 6122 | } |
| 6123 | |
Nico Weber | d1d512a | 2012-01-09 19:52:25 +0000 | [diff] [blame] | 6124 | /// \brief Compute the diagnostic location for an explicit instantiation |
| 6125 | // declaration or definition. |
| 6126 | static SourceLocation DiagLocForExplicitInstantiation( |
Douglas Gregor | f785a7d | 2012-01-14 15:55:47 +0000 | [diff] [blame] | 6127 | NamedDecl* D, SourceLocation PointOfInstantiation) { |
Nico Weber | d1d512a | 2012-01-09 19:52:25 +0000 | [diff] [blame] | 6128 | // Explicit instantiations following a specialization have no effect and |
| 6129 | // hence no PointOfInstantiation. In that case, walk decl backwards |
| 6130 | // until a valid name loc is found. |
| 6131 | SourceLocation PrevDiagLoc = PointOfInstantiation; |
Douglas Gregor | f785a7d | 2012-01-14 15:55:47 +0000 | [diff] [blame] | 6132 | for (Decl *Prev = D; Prev && !PrevDiagLoc.isValid(); |
| 6133 | Prev = Prev->getPreviousDecl()) { |
Nico Weber | d1d512a | 2012-01-09 19:52:25 +0000 | [diff] [blame] | 6134 | PrevDiagLoc = Prev->getLocation(); |
| 6135 | } |
| 6136 | assert(PrevDiagLoc.isValid() && |
| 6137 | "Explicit instantiation without point of instantiation?"); |
| 6138 | return PrevDiagLoc; |
| 6139 | } |
| 6140 | |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6141 | /// \brief Diagnose cases where we have an explicit template specialization |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6142 | /// before/after an explicit template instantiation, producing diagnostics |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6143 | /// for those cases where they are required and determining whether the |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6144 | /// new specialization/instantiation will have any effect. |
| 6145 | /// |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6146 | /// \param NewLoc the location of the new explicit specialization or |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6147 | /// instantiation. |
| 6148 | /// |
| 6149 | /// \param NewTSK the kind of the new explicit specialization or instantiation. |
| 6150 | /// |
| 6151 | /// \param PrevDecl the previous declaration of the entity. |
| 6152 | /// |
| 6153 | /// \param PrevTSK the kind of the old explicit specialization or instantiatin. |
| 6154 | /// |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6155 | /// \param PrevPointOfInstantiation if valid, indicates where the previus |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6156 | /// declaration was instantiated (either implicitly or explicitly). |
| 6157 | /// |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6158 | /// \param HasNoEffect will be set to true to indicate that the new |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6159 | /// specialization or instantiation has no effect and should be ignored. |
| 6160 | /// |
| 6161 | /// \returns true if there was an error that should prevent the introduction of |
| 6162 | /// the new declaration into the AST, false otherwise. |
Douglas Gregor | 0d03514 | 2009-10-27 18:42:08 +0000 | [diff] [blame] | 6163 | bool |
| 6164 | Sema::CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, |
| 6165 | TemplateSpecializationKind NewTSK, |
| 6166 | NamedDecl *PrevDecl, |
| 6167 | TemplateSpecializationKind PrevTSK, |
| 6168 | SourceLocation PrevPointOfInstantiation, |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 6169 | bool &HasNoEffect) { |
| 6170 | HasNoEffect = false; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6171 | |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6172 | switch (NewTSK) { |
| 6173 | case TSK_Undeclared: |
| 6174 | case TSK_ImplicitInstantiation: |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 6175 | llvm_unreachable("Don't check implicit instantiations here"); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6176 | |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6177 | case TSK_ExplicitSpecialization: |
| 6178 | switch (PrevTSK) { |
| 6179 | case TSK_Undeclared: |
| 6180 | case TSK_ExplicitSpecialization: |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6181 | // Okay, we're just specializing something that is either already |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6182 | // explicitly specialized or has merely been mentioned without any |
| 6183 | // instantiation. |
| 6184 | return false; |
| 6185 | |
| 6186 | case TSK_ImplicitInstantiation: |
| 6187 | if (PrevPointOfInstantiation.isInvalid()) { |
| 6188 | // The declaration itself has not actually been instantiated, so it is |
| 6189 | // still okay to specialize it. |
John McCall | 7504239 | 2010-02-11 01:33:53 +0000 | [diff] [blame] | 6190 | StripImplicitInstantiation(PrevDecl); |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6191 | return false; |
| 6192 | } |
| 6193 | // Fall through |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6194 | |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6195 | case TSK_ExplicitInstantiationDeclaration: |
| 6196 | case TSK_ExplicitInstantiationDefinition: |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6197 | assert((PrevTSK == TSK_ImplicitInstantiation || |
| 6198 | PrevPointOfInstantiation.isValid()) && |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6199 | "Explicit instantiation without point of instantiation?"); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6200 | |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6201 | // C++ [temp.expl.spec]p6: |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6202 | // If a template, a member template or the member of a class template |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6203 | // is explicitly specialized then that specialization shall be declared |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6204 | // before the first use of that specialization that would cause an |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6205 | // implicit instantiation to take place, in every translation unit in |
| 6206 | // which such a use occurs; no diagnostic is required. |
Douglas Gregor | f785a7d | 2012-01-14 15:55:47 +0000 | [diff] [blame] | 6207 | for (Decl *Prev = PrevDecl; Prev; Prev = Prev->getPreviousDecl()) { |
Douglas Gregor | dc0a11c | 2010-02-26 06:03:23 +0000 | [diff] [blame] | 6208 | // Is there any previous explicit specialization declaration? |
| 6209 | if (getTemplateSpecializationKind(Prev) == TSK_ExplicitSpecialization) |
| 6210 | return false; |
| 6211 | } |
| 6212 | |
Douglas Gregor | 0d03514 | 2009-10-27 18:42:08 +0000 | [diff] [blame] | 6213 | Diag(NewLoc, diag::err_specialization_after_instantiation) |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6214 | << PrevDecl; |
Douglas Gregor | 0d03514 | 2009-10-27 18:42:08 +0000 | [diff] [blame] | 6215 | Diag(PrevPointOfInstantiation, diag::note_instantiation_required_here) |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6216 | << (PrevTSK != TSK_ImplicitInstantiation); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6217 | |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6218 | return true; |
| 6219 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6220 | |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6221 | case TSK_ExplicitInstantiationDeclaration: |
| 6222 | switch (PrevTSK) { |
| 6223 | case TSK_ExplicitInstantiationDeclaration: |
| 6224 | // This explicit instantiation declaration is redundant (that's okay). |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 6225 | HasNoEffect = true; |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6226 | return false; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6227 | |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6228 | case TSK_Undeclared: |
| 6229 | case TSK_ImplicitInstantiation: |
| 6230 | // We're explicitly instantiating something that may have already been |
| 6231 | // implicitly instantiated; that's fine. |
| 6232 | return false; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6233 | |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6234 | case TSK_ExplicitSpecialization: |
| 6235 | // C++0x [temp.explicit]p4: |
| 6236 | // For a given set of template parameters, if an explicit instantiation |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6237 | // of a template appears after a declaration of an explicit |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6238 | // specialization for that template, the explicit instantiation has no |
| 6239 | // effect. |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 6240 | HasNoEffect = true; |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6241 | return false; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6242 | |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6243 | case TSK_ExplicitInstantiationDefinition: |
| 6244 | // C++0x [temp.explicit]p10: |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6245 | // If an entity is the subject of both an explicit instantiation |
| 6246 | // declaration and an explicit instantiation definition in the same |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6247 | // translation unit, the definition shall follow the declaration. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6248 | Diag(NewLoc, |
Douglas Gregor | 0d03514 | 2009-10-27 18:42:08 +0000 | [diff] [blame] | 6249 | diag::err_explicit_instantiation_declaration_after_definition); |
Nico Weber | ff91d24 | 2011-12-23 20:58:04 +0000 | [diff] [blame] | 6250 | |
| 6251 | // Explicit instantiations following a specialization have no effect and |
| 6252 | // hence no PrevPointOfInstantiation. In that case, walk decl backwards |
| 6253 | // until a valid name loc is found. |
Nico Weber | d1d512a | 2012-01-09 19:52:25 +0000 | [diff] [blame] | 6254 | Diag(DiagLocForExplicitInstantiation(PrevDecl, PrevPointOfInstantiation), |
| 6255 | diag::note_explicit_instantiation_definition_here); |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 6256 | HasNoEffect = true; |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6257 | return false; |
| 6258 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6259 | |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6260 | case TSK_ExplicitInstantiationDefinition: |
| 6261 | switch (PrevTSK) { |
| 6262 | case TSK_Undeclared: |
| 6263 | case TSK_ImplicitInstantiation: |
| 6264 | // We're explicitly instantiating something that may have already been |
| 6265 | // implicitly instantiated; that's fine. |
| 6266 | return false; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6267 | |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6268 | case TSK_ExplicitSpecialization: |
| 6269 | // C++ DR 259, C++0x [temp.explicit]p4: |
| 6270 | // For a given set of template parameters, if an explicit |
| 6271 | // instantiation of a template appears after a declaration of |
| 6272 | // an explicit specialization for that template, the explicit |
| 6273 | // instantiation has no effect. |
| 6274 | // |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6275 | // In C++98/03 mode, we only give an extension warning here, because it |
Douglas Gregor | c42b652 | 2010-04-09 21:02:29 +0000 | [diff] [blame] | 6276 | // is not harmful to try to explicitly instantiate something that |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6277 | // has been explicitly specialized. |
Richard Smith | 80ad52f | 2013-01-02 11:42:31 +0000 | [diff] [blame] | 6278 | Diag(NewLoc, getLangOpts().CPlusPlus11 ? |
Richard Smith | ebaf0e6 | 2011-10-18 20:49:44 +0000 | [diff] [blame] | 6279 | diag::warn_cxx98_compat_explicit_instantiation_after_specialization : |
| 6280 | diag::ext_explicit_instantiation_after_specialization) |
| 6281 | << PrevDecl; |
| 6282 | Diag(PrevDecl->getLocation(), |
| 6283 | diag::note_previous_template_specialization); |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 6284 | HasNoEffect = true; |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6285 | return false; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6286 | |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6287 | case TSK_ExplicitInstantiationDeclaration: |
| 6288 | // We're explicity instantiating a definition for something for which we |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6289 | // were previously asked to suppress instantiations. That's fine. |
Nico Weber | ff91d24 | 2011-12-23 20:58:04 +0000 | [diff] [blame] | 6290 | |
| 6291 | // C++0x [temp.explicit]p4: |
| 6292 | // For a given set of template parameters, if an explicit instantiation |
| 6293 | // of a template appears after a declaration of an explicit |
| 6294 | // specialization for that template, the explicit instantiation has no |
| 6295 | // effect. |
Douglas Gregor | f785a7d | 2012-01-14 15:55:47 +0000 | [diff] [blame] | 6296 | for (Decl *Prev = PrevDecl; Prev; Prev = Prev->getPreviousDecl()) { |
Nico Weber | ff91d24 | 2011-12-23 20:58:04 +0000 | [diff] [blame] | 6297 | // Is there any previous explicit specialization declaration? |
| 6298 | if (getTemplateSpecializationKind(Prev) == TSK_ExplicitSpecialization) { |
| 6299 | HasNoEffect = true; |
| 6300 | break; |
| 6301 | } |
| 6302 | } |
| 6303 | |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6304 | return false; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6305 | |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6306 | case TSK_ExplicitInstantiationDefinition: |
| 6307 | // C++0x [temp.spec]p5: |
| 6308 | // For a given template and a given set of template-arguments, |
| 6309 | // - an explicit instantiation definition shall appear at most once |
| 6310 | // in a program, |
Douglas Gregor | 0d03514 | 2009-10-27 18:42:08 +0000 | [diff] [blame] | 6311 | Diag(NewLoc, diag::err_explicit_instantiation_duplicate) |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6312 | << PrevDecl; |
Nico Weber | d1d512a | 2012-01-09 19:52:25 +0000 | [diff] [blame] | 6313 | Diag(DiagLocForExplicitInstantiation(PrevDecl, PrevPointOfInstantiation), |
Douglas Gregor | 0d03514 | 2009-10-27 18:42:08 +0000 | [diff] [blame] | 6314 | diag::note_previous_explicit_instantiation); |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 6315 | HasNoEffect = true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6316 | return false; |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6317 | } |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6318 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6319 | |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 6320 | llvm_unreachable("Missing specialization/instantiation case?"); |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 6321 | } |
| 6322 | |
John McCall | af2094e | 2010-04-08 09:05:18 +0000 | [diff] [blame] | 6323 | /// \brief Perform semantic analysis for the given dependent function |
James Dennett | ef2b5b3 | 2012-06-15 22:23:43 +0000 | [diff] [blame] | 6324 | /// template specialization. |
John McCall | af2094e | 2010-04-08 09:05:18 +0000 | [diff] [blame] | 6325 | /// |
James Dennett | ef2b5b3 | 2012-06-15 22:23:43 +0000 | [diff] [blame] | 6326 | /// The only possible way to get a dependent function template specialization |
| 6327 | /// is with a friend declaration, like so: |
| 6328 | /// |
| 6329 | /// \code |
| 6330 | /// template \<class T> void foo(T); |
| 6331 | /// template \<class T> class A { |
John McCall | af2094e | 2010-04-08 09:05:18 +0000 | [diff] [blame] | 6332 | /// friend void foo<>(T); |
| 6333 | /// }; |
James Dennett | ef2b5b3 | 2012-06-15 22:23:43 +0000 | [diff] [blame] | 6334 | /// \endcode |
John McCall | af2094e | 2010-04-08 09:05:18 +0000 | [diff] [blame] | 6335 | /// |
| 6336 | /// There really isn't any useful analysis we can do here, so we |
| 6337 | /// just store the information. |
| 6338 | bool |
| 6339 | Sema::CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, |
| 6340 | const TemplateArgumentListInfo &ExplicitTemplateArgs, |
| 6341 | LookupResult &Previous) { |
| 6342 | // Remove anything from Previous that isn't a function template in |
| 6343 | // the correct context. |
Sebastian Redl | 7a126a4 | 2010-08-31 00:36:30 +0000 | [diff] [blame] | 6344 | DeclContext *FDLookupContext = FD->getDeclContext()->getRedeclContext(); |
John McCall | af2094e | 2010-04-08 09:05:18 +0000 | [diff] [blame] | 6345 | LookupResult::Filter F = Previous.makeFilter(); |
| 6346 | while (F.hasNext()) { |
| 6347 | NamedDecl *D = F.next()->getUnderlyingDecl(); |
| 6348 | if (!isa<FunctionTemplateDecl>(D) || |
Sebastian Redl | 7a126a4 | 2010-08-31 00:36:30 +0000 | [diff] [blame] | 6349 | !FDLookupContext->InEnclosingNamespaceSetOf( |
| 6350 | D->getDeclContext()->getRedeclContext())) |
John McCall | af2094e | 2010-04-08 09:05:18 +0000 | [diff] [blame] | 6351 | F.erase(); |
| 6352 | } |
| 6353 | F.done(); |
| 6354 | |
| 6355 | // Should this be diagnosed here? |
| 6356 | if (Previous.empty()) return true; |
| 6357 | |
| 6358 | FD->setDependentTemplateSpecialization(Context, Previous.asUnresolvedSet(), |
| 6359 | ExplicitTemplateArgs); |
| 6360 | return false; |
| 6361 | } |
| 6362 | |
Abramo Bagnara | e03db98 | 2010-05-20 15:32:11 +0000 | [diff] [blame] | 6363 | /// \brief Perform semantic analysis for the given function template |
Douglas Gregor | b9aa6b2 | 2009-09-24 23:14:47 +0000 | [diff] [blame] | 6364 | /// specialization. |
| 6365 | /// |
Abramo Bagnara | e03db98 | 2010-05-20 15:32:11 +0000 | [diff] [blame] | 6366 | /// This routine performs all of the semantic analysis required for an |
Douglas Gregor | b9aa6b2 | 2009-09-24 23:14:47 +0000 | [diff] [blame] | 6367 | /// explicit function template specialization. On successful completion, |
| 6368 | /// the function declaration \p FD will become a function template |
| 6369 | /// specialization. |
| 6370 | /// |
| 6371 | /// \param FD the function declaration, which will be updated to become a |
| 6372 | /// function template specialization. |
| 6373 | /// |
Abramo Bagnara | e03db98 | 2010-05-20 15:32:11 +0000 | [diff] [blame] | 6374 | /// \param ExplicitTemplateArgs the explicitly-provided template arguments, |
| 6375 | /// if any. Note that this may be valid info even when 0 arguments are |
| 6376 | /// explicitly provided as in, e.g., \c void sort<>(char*, char*); |
| 6377 | /// as it anyway contains info on the angle brackets locations. |
Douglas Gregor | b9aa6b2 | 2009-09-24 23:14:47 +0000 | [diff] [blame] | 6378 | /// |
Francois Pichet | 59e7c56 | 2011-07-08 06:21:47 +0000 | [diff] [blame] | 6379 | /// \param Previous the set of declarations that may be specialized by |
Abramo Bagnara | e03db98 | 2010-05-20 15:32:11 +0000 | [diff] [blame] | 6380 | /// this function specialization. |
Larisse Voufo | 4384712 | 2013-07-19 23:00:19 +0000 | [diff] [blame] | 6381 | bool Sema::CheckFunctionTemplateSpecialization( |
| 6382 | FunctionDecl *FD, TemplateArgumentListInfo *ExplicitTemplateArgs, |
| 6383 | LookupResult &Previous) { |
Douglas Gregor | b9aa6b2 | 2009-09-24 23:14:47 +0000 | [diff] [blame] | 6384 | // The set of function template specializations that could match this |
| 6385 | // explicit function template specialization. |
John McCall | c373d48 | 2010-01-27 01:50:18 +0000 | [diff] [blame] | 6386 | UnresolvedSet<8> Candidates; |
Larisse Voufo | 4384712 | 2013-07-19 23:00:19 +0000 | [diff] [blame] | 6387 | TemplateSpecCandidateSet FailedCandidates(FD->getLocation()); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6388 | |
Sebastian Redl | 7a126a4 | 2010-08-31 00:36:30 +0000 | [diff] [blame] | 6389 | DeclContext *FDLookupContext = FD->getDeclContext()->getRedeclContext(); |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6390 | for (LookupResult::iterator I = Previous.begin(), E = Previous.end(); |
| 6391 | I != E; ++I) { |
| 6392 | NamedDecl *Ovl = (*I)->getUnderlyingDecl(); |
| 6393 | if (FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(Ovl)) { |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6394 | // Only consider templates found within the same semantic lookup scope as |
Douglas Gregor | b9aa6b2 | 2009-09-24 23:14:47 +0000 | [diff] [blame] | 6395 | // FD. |
Sebastian Redl | 7a126a4 | 2010-08-31 00:36:30 +0000 | [diff] [blame] | 6396 | if (!FDLookupContext->InEnclosingNamespaceSetOf( |
| 6397 | Ovl->getDeclContext()->getRedeclContext())) |
Douglas Gregor | b9aa6b2 | 2009-09-24 23:14:47 +0000 | [diff] [blame] | 6398 | continue; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6399 | |
Richard Smith | 21c8fa8 | 2013-01-14 05:37:29 +0000 | [diff] [blame] | 6400 | // When matching a constexpr member function template specialization |
| 6401 | // against the primary template, we don't yet know whether the |
| 6402 | // specialization has an implicit 'const' (because we don't know whether |
| 6403 | // it will be a static member function until we know which template it |
| 6404 | // specializes), so adjust it now assuming it specializes this template. |
| 6405 | QualType FT = FD->getType(); |
| 6406 | if (FD->isConstexpr()) { |
| 6407 | CXXMethodDecl *OldMD = |
| 6408 | dyn_cast<CXXMethodDecl>(FunTmpl->getTemplatedDecl()); |
| 6409 | if (OldMD && OldMD->isConst()) { |
| 6410 | const FunctionProtoType *FPT = FT->castAs<FunctionProtoType>(); |
| 6411 | FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); |
| 6412 | EPI.TypeQuals |= Qualifiers::Const; |
Reid Kleckner | 0567a79 | 2013-06-10 20:51:09 +0000 | [diff] [blame] | 6413 | FT = Context.getFunctionType(FPT->getResultType(), FPT->getArgTypes(), |
Jordan Rose | bea522f | 2013-03-08 21:51:21 +0000 | [diff] [blame] | 6414 | EPI); |
Richard Smith | 21c8fa8 | 2013-01-14 05:37:29 +0000 | [diff] [blame] | 6415 | } |
| 6416 | } |
| 6417 | |
Douglas Gregor | b9aa6b2 | 2009-09-24 23:14:47 +0000 | [diff] [blame] | 6418 | // C++ [temp.expl.spec]p11: |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6419 | // A trailing template-argument can be left unspecified in the |
| 6420 | // template-id naming an explicit function template specialization |
Douglas Gregor | b9aa6b2 | 2009-09-24 23:14:47 +0000 | [diff] [blame] | 6421 | // provided it can be deduced from the function argument type. |
| 6422 | // Perform template argument deduction to determine whether we may be |
| 6423 | // specializing this template. |
| 6424 | // FIXME: It is somewhat wasteful to build |
Larisse Voufo | 4384712 | 2013-07-19 23:00:19 +0000 | [diff] [blame] | 6425 | TemplateDeductionInfo Info(FailedCandidates.getLocation()); |
Douglas Gregor | b9aa6b2 | 2009-09-24 23:14:47 +0000 | [diff] [blame] | 6426 | FunctionDecl *Specialization = 0; |
| 6427 | if (TemplateDeductionResult TDK |
Richard Smith | 21c8fa8 | 2013-01-14 05:37:29 +0000 | [diff] [blame] | 6428 | = DeduceTemplateArguments(FunTmpl, ExplicitTemplateArgs, FT, |
| 6429 | Specialization, Info)) { |
Larisse Voufo | 4384712 | 2013-07-19 23:00:19 +0000 | [diff] [blame] | 6430 | // Template argument deduction failed; record why it failed, so |
Douglas Gregor | b9aa6b2 | 2009-09-24 23:14:47 +0000 | [diff] [blame] | 6431 | // that we can provide nifty diagnostics. |
Larisse Voufo | 4384712 | 2013-07-19 23:00:19 +0000 | [diff] [blame] | 6432 | FailedCandidates.addCandidate() |
| 6433 | .set(FunTmpl->getTemplatedDecl(), |
| 6434 | MakeDeductionFailureInfo(Context, TDK, Info)); |
Douglas Gregor | b9aa6b2 | 2009-09-24 23:14:47 +0000 | [diff] [blame] | 6435 | (void)TDK; |
| 6436 | continue; |
| 6437 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6438 | |
Douglas Gregor | b9aa6b2 | 2009-09-24 23:14:47 +0000 | [diff] [blame] | 6439 | // Record this candidate. |
John McCall | c373d48 | 2010-01-27 01:50:18 +0000 | [diff] [blame] | 6440 | Candidates.addDecl(Specialization, I.getAccess()); |
Douglas Gregor | b9aa6b2 | 2009-09-24 23:14:47 +0000 | [diff] [blame] | 6441 | } |
| 6442 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6443 | |
Douglas Gregor | c5df30f | 2009-09-26 03:41:46 +0000 | [diff] [blame] | 6444 | // Find the most specialized function template. |
Larisse Voufo | 4384712 | 2013-07-19 23:00:19 +0000 | [diff] [blame] | 6445 | UnresolvedSetIterator Result = getMostSpecialized( |
| 6446 | Candidates.begin(), Candidates.end(), FailedCandidates, TPOC_Other, 0, |
| 6447 | FD->getLocation(), |
| 6448 | PDiag(diag::err_function_template_spec_no_match) << FD->getDeclName(), |
| 6449 | PDiag(diag::err_function_template_spec_ambiguous) |
| 6450 | << FD->getDeclName() << (ExplicitTemplateArgs != 0), |
| 6451 | PDiag(diag::note_function_template_spec_matched)); |
| 6452 | |
John McCall | c373d48 | 2010-01-27 01:50:18 +0000 | [diff] [blame] | 6453 | if (Result == Candidates.end()) |
Douglas Gregor | b9aa6b2 | 2009-09-24 23:14:47 +0000 | [diff] [blame] | 6454 | return true; |
John McCall | c373d48 | 2010-01-27 01:50:18 +0000 | [diff] [blame] | 6455 | |
| 6456 | // Ignore access information; it doesn't figure into redeclaration checking. |
| 6457 | FunctionDecl *Specialization = cast<FunctionDecl>(*Result); |
Abramo Bagnara | abfb405 | 2011-03-04 17:20:30 +0000 | [diff] [blame] | 6458 | |
| 6459 | FunctionTemplateSpecializationInfo *SpecInfo |
| 6460 | = Specialization->getTemplateSpecializationInfo(); |
| 6461 | assert(SpecInfo && "Function template specialization info missing?"); |
Francois Pichet | 59e7c56 | 2011-07-08 06:21:47 +0000 | [diff] [blame] | 6462 | |
| 6463 | // Note: do not overwrite location info if previous template |
| 6464 | // specialization kind was explicit. |
| 6465 | TemplateSpecializationKind TSK = SpecInfo->getTemplateSpecializationKind(); |
Richard Smith | ff23488 | 2012-02-20 23:28:05 +0000 | [diff] [blame] | 6466 | if (TSK == TSK_Undeclared || TSK == TSK_ImplicitInstantiation) { |
Francois Pichet | 59e7c56 | 2011-07-08 06:21:47 +0000 | [diff] [blame] | 6467 | Specialization->setLocation(FD->getLocation()); |
Richard Smith | ff23488 | 2012-02-20 23:28:05 +0000 | [diff] [blame] | 6468 | // C++11 [dcl.constexpr]p1: An explicit specialization of a constexpr |
| 6469 | // function can differ from the template declaration with respect to |
| 6470 | // the constexpr specifier. |
| 6471 | Specialization->setConstexpr(FD->isConstexpr()); |
| 6472 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6473 | |
Douglas Gregor | b9aa6b2 | 2009-09-24 23:14:47 +0000 | [diff] [blame] | 6474 | // FIXME: Check if the prior specialization has a point of instantiation. |
Douglas Gregor | b3ae4fc | 2009-10-12 20:18:28 +0000 | [diff] [blame] | 6475 | // If so, we have run afoul of . |
John McCall | 7ad650f | 2010-03-24 07:46:06 +0000 | [diff] [blame] | 6476 | |
| 6477 | // If this is a friend declaration, then we're not really declaring |
| 6478 | // an explicit specialization. |
| 6479 | bool isFriend = (FD->getFriendObjectKind() != Decl::FOK_None); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6480 | |
Douglas Gregor | d5cb876 | 2009-10-07 00:13:32 +0000 | [diff] [blame] | 6481 | // Check the scope of this explicit specialization. |
John McCall | 7ad650f | 2010-03-24 07:46:06 +0000 | [diff] [blame] | 6482 | if (!isFriend && |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6483 | CheckTemplateSpecializationScope(*this, |
Douglas Gregor | d5cb876 | 2009-10-07 00:13:32 +0000 | [diff] [blame] | 6484 | Specialization->getPrimaryTemplate(), |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6485 | Specialization, FD->getLocation(), |
Douglas Gregor | 9302da6 | 2009-10-14 23:50:59 +0000 | [diff] [blame] | 6486 | false)) |
Douglas Gregor | d5cb876 | 2009-10-07 00:13:32 +0000 | [diff] [blame] | 6487 | return true; |
Douglas Gregor | b3ae4fc | 2009-10-12 20:18:28 +0000 | [diff] [blame] | 6488 | |
| 6489 | // C++ [temp.expl.spec]p6: |
| 6490 | // If a template, a member template or the member of a class template is |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6491 | // explicitly specialized then that specialization shall be declared |
Douglas Gregor | b3ae4fc | 2009-10-12 20:18:28 +0000 | [diff] [blame] | 6492 | // before the first use of that specialization that would cause an implicit |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6493 | // instantiation to take place, in every translation unit in which such a |
Douglas Gregor | b3ae4fc | 2009-10-12 20:18:28 +0000 | [diff] [blame] | 6494 | // use occurs; no diagnostic is required. |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 6495 | bool HasNoEffect = false; |
John McCall | 7ad650f | 2010-03-24 07:46:06 +0000 | [diff] [blame] | 6496 | if (!isFriend && |
| 6497 | CheckSpecializationInstantiationRedecl(FD->getLocation(), |
John McCall | 7504239 | 2010-02-11 01:33:53 +0000 | [diff] [blame] | 6498 | TSK_ExplicitSpecialization, |
| 6499 | Specialization, |
| 6500 | SpecInfo->getTemplateSpecializationKind(), |
| 6501 | SpecInfo->getPointOfInstantiation(), |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 6502 | HasNoEffect)) |
Douglas Gregor | b3ae4fc | 2009-10-12 20:18:28 +0000 | [diff] [blame] | 6503 | return true; |
Douglas Gregor | e885e18 | 2011-05-21 18:53:30 +0000 | [diff] [blame] | 6504 | |
Douglas Gregor | b9aa6b2 | 2009-09-24 23:14:47 +0000 | [diff] [blame] | 6505 | // Mark the prior declaration as an explicit specialization, so that later |
| 6506 | // clients know that this is an explicit specialization. |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 6507 | if (!isFriend) { |
John McCall | 7ad650f | 2010-03-24 07:46:06 +0000 | [diff] [blame] | 6508 | SpecInfo->setTemplateSpecializationKind(TSK_ExplicitSpecialization); |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 6509 | MarkUnusedFileScopedDecl(Specialization); |
| 6510 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6511 | |
Douglas Gregor | b9aa6b2 | 2009-09-24 23:14:47 +0000 | [diff] [blame] | 6512 | // Turn the given function declaration into a function template |
| 6513 | // specialization, with the template arguments from the previous |
| 6514 | // specialization. |
Abramo Bagnara | e03db98 | 2010-05-20 15:32:11 +0000 | [diff] [blame] | 6515 | // Take copies of (semantic and syntactic) template argument lists. |
| 6516 | const TemplateArgumentList* TemplArgs = new (Context) |
| 6517 | TemplateArgumentList(Specialization->getTemplateSpecializationArgs()); |
Douglas Gregor | 838db38 | 2010-02-11 01:19:42 +0000 | [diff] [blame] | 6518 | FD->setFunctionTemplateSpecialization(Specialization->getPrimaryTemplate(), |
Abramo Bagnara | e03db98 | 2010-05-20 15:32:11 +0000 | [diff] [blame] | 6519 | TemplArgs, /*InsertPos=*/0, |
| 6520 | SpecInfo->getTemplateSpecializationKind(), |
Argyrios Kyrtzidis | 71a7605 | 2011-09-22 20:07:09 +0000 | [diff] [blame] | 6521 | ExplicitTemplateArgs); |
Rafael Espindola | d2615cc | 2013-04-03 19:27:57 +0000 | [diff] [blame] | 6522 | |
Douglas Gregor | b9aa6b2 | 2009-09-24 23:14:47 +0000 | [diff] [blame] | 6523 | // The "previous declaration" for this function template specialization is |
| 6524 | // the prior function template specialization. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6525 | Previous.clear(); |
| 6526 | Previous.addDecl(Specialization); |
Douglas Gregor | b9aa6b2 | 2009-09-24 23:14:47 +0000 | [diff] [blame] | 6527 | return false; |
| 6528 | } |
| 6529 | |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 6530 | /// \brief Perform semantic analysis for the given non-template member |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 6531 | /// specialization. |
| 6532 | /// |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6533 | /// This routine performs all of the semantic analysis required for an |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 6534 | /// explicit member function specialization. On successful completion, |
| 6535 | /// the function declaration \p FD will become a member function |
| 6536 | /// specialization. |
| 6537 | /// |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 6538 | /// \param Member the member declaration, which will be updated to become a |
| 6539 | /// specialization. |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 6540 | /// |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6541 | /// \param Previous the set of declarations, one of which may be specialized |
| 6542 | /// by this function specialization; the set will be modified to contain the |
| 6543 | /// redeclared member. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6544 | bool |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6545 | Sema::CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous) { |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 6546 | assert(!isa<TemplateDecl>(Member) && "Only for non-template members"); |
John McCall | 77e8b11 | 2010-04-13 20:37:33 +0000 | [diff] [blame] | 6547 | |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 6548 | // Try to find the member we are instantiating. |
| 6549 | NamedDecl *Instantiation = 0; |
| 6550 | NamedDecl *InstantiatedFrom = 0; |
Douglas Gregor | b3ae4fc | 2009-10-12 20:18:28 +0000 | [diff] [blame] | 6551 | MemberSpecializationInfo *MSInfo = 0; |
| 6552 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6553 | if (Previous.empty()) { |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 6554 | // Nowhere to look anyway. |
| 6555 | } else if (FunctionDecl *Function = dyn_cast<FunctionDecl>(Member)) { |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6556 | for (LookupResult::iterator I = Previous.begin(), E = Previous.end(); |
| 6557 | I != E; ++I) { |
| 6558 | NamedDecl *D = (*I)->getUnderlyingDecl(); |
| 6559 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) { |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 6560 | if (Context.hasSameType(Function->getType(), Method->getType())) { |
| 6561 | Instantiation = Method; |
| 6562 | InstantiatedFrom = Method->getInstantiatedFromMemberFunction(); |
Douglas Gregor | b3ae4fc | 2009-10-12 20:18:28 +0000 | [diff] [blame] | 6563 | MSInfo = Method->getMemberSpecializationInfo(); |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 6564 | break; |
| 6565 | } |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 6566 | } |
| 6567 | } |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 6568 | } else if (isa<VarDecl>(Member)) { |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6569 | VarDecl *PrevVar; |
| 6570 | if (Previous.isSingleResult() && |
| 6571 | (PrevVar = dyn_cast<VarDecl>(Previous.getFoundDecl()))) |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 6572 | if (PrevVar->isStaticDataMember()) { |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6573 | Instantiation = PrevVar; |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 6574 | InstantiatedFrom = PrevVar->getInstantiatedFromStaticDataMember(); |
Douglas Gregor | b3ae4fc | 2009-10-12 20:18:28 +0000 | [diff] [blame] | 6575 | MSInfo = PrevVar->getMemberSpecializationInfo(); |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 6576 | } |
| 6577 | } else if (isa<RecordDecl>(Member)) { |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6578 | CXXRecordDecl *PrevRecord; |
| 6579 | if (Previous.isSingleResult() && |
| 6580 | (PrevRecord = dyn_cast<CXXRecordDecl>(Previous.getFoundDecl()))) { |
| 6581 | Instantiation = PrevRecord; |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 6582 | InstantiatedFrom = PrevRecord->getInstantiatedFromMemberClass(); |
Douglas Gregor | b3ae4fc | 2009-10-12 20:18:28 +0000 | [diff] [blame] | 6583 | MSInfo = PrevRecord->getMemberSpecializationInfo(); |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 6584 | } |
Richard Smith | 1af83c4 | 2012-03-23 03:33:32 +0000 | [diff] [blame] | 6585 | } else if (isa<EnumDecl>(Member)) { |
| 6586 | EnumDecl *PrevEnum; |
| 6587 | if (Previous.isSingleResult() && |
| 6588 | (PrevEnum = dyn_cast<EnumDecl>(Previous.getFoundDecl()))) { |
| 6589 | Instantiation = PrevEnum; |
| 6590 | InstantiatedFrom = PrevEnum->getInstantiatedFromMemberEnum(); |
| 6591 | MSInfo = PrevEnum->getMemberSpecializationInfo(); |
| 6592 | } |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 6593 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6594 | |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 6595 | if (!Instantiation) { |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 6596 | // There is no previous declaration that matches. Since member |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 6597 | // specializations are always out-of-line, the caller will complain about |
| 6598 | // this mismatch later. |
| 6599 | return false; |
| 6600 | } |
John McCall | 77e8b11 | 2010-04-13 20:37:33 +0000 | [diff] [blame] | 6601 | |
| 6602 | // If this is a friend, just bail out here before we start turning |
| 6603 | // things into explicit specializations. |
| 6604 | if (Member->getFriendObjectKind() != Decl::FOK_None) { |
| 6605 | // Preserve instantiation information. |
| 6606 | if (InstantiatedFrom && isa<CXXMethodDecl>(Member)) { |
| 6607 | cast<CXXMethodDecl>(Member)->setInstantiationOfMemberFunction( |
| 6608 | cast<CXXMethodDecl>(InstantiatedFrom), |
| 6609 | cast<CXXMethodDecl>(Instantiation)->getTemplateSpecializationKind()); |
| 6610 | } else if (InstantiatedFrom && isa<CXXRecordDecl>(Member)) { |
| 6611 | cast<CXXRecordDecl>(Member)->setInstantiationOfMemberClass( |
| 6612 | cast<CXXRecordDecl>(InstantiatedFrom), |
| 6613 | cast<CXXRecordDecl>(Instantiation)->getTemplateSpecializationKind()); |
| 6614 | } |
| 6615 | |
| 6616 | Previous.clear(); |
| 6617 | Previous.addDecl(Instantiation); |
| 6618 | return false; |
| 6619 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6620 | |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 6621 | // Make sure that this is a specialization of a member. |
| 6622 | if (!InstantiatedFrom) { |
| 6623 | Diag(Member->getLocation(), diag::err_spec_member_not_instantiated) |
| 6624 | << Member; |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 6625 | Diag(Instantiation->getLocation(), diag::note_specialized_decl); |
| 6626 | return true; |
| 6627 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6628 | |
Douglas Gregor | b3ae4fc | 2009-10-12 20:18:28 +0000 | [diff] [blame] | 6629 | // C++ [temp.expl.spec]p6: |
| 6630 | // If a template, a member template or the member of a class template is |
Nico Weber | ff91d24 | 2011-12-23 20:58:04 +0000 | [diff] [blame] | 6631 | // explicitly specialized then that specialization shall be declared |
Douglas Gregor | b3ae4fc | 2009-10-12 20:18:28 +0000 | [diff] [blame] | 6632 | // before the first use of that specialization that would cause an implicit |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6633 | // instantiation to take place, in every translation unit in which such a |
Douglas Gregor | b3ae4fc | 2009-10-12 20:18:28 +0000 | [diff] [blame] | 6634 | // use occurs; no diagnostic is required. |
| 6635 | assert(MSInfo && "Member specialization info missing?"); |
John McCall | 7504239 | 2010-02-11 01:33:53 +0000 | [diff] [blame] | 6636 | |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 6637 | bool HasNoEffect = false; |
John McCall | 7504239 | 2010-02-11 01:33:53 +0000 | [diff] [blame] | 6638 | if (CheckSpecializationInstantiationRedecl(Member->getLocation(), |
| 6639 | TSK_ExplicitSpecialization, |
| 6640 | Instantiation, |
| 6641 | MSInfo->getTemplateSpecializationKind(), |
| 6642 | MSInfo->getPointOfInstantiation(), |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 6643 | HasNoEffect)) |
Douglas Gregor | b3ae4fc | 2009-10-12 20:18:28 +0000 | [diff] [blame] | 6644 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6645 | |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 6646 | // Check the scope of this explicit specialization. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6647 | if (CheckTemplateSpecializationScope(*this, |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 6648 | InstantiatedFrom, |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6649 | Instantiation, Member->getLocation(), |
Douglas Gregor | 9302da6 | 2009-10-14 23:50:59 +0000 | [diff] [blame] | 6650 | false)) |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 6651 | return true; |
Douglas Gregor | 2db3232 | 2009-10-07 23:56:10 +0000 | [diff] [blame] | 6652 | |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 6653 | // Note that this is an explicit instantiation of a member. |
Douglas Gregor | f6b1185 | 2009-10-08 15:14:33 +0000 | [diff] [blame] | 6654 | // the original declaration to note that it is an explicit specialization |
| 6655 | // (if it was previously an implicit instantiation). This latter step |
| 6656 | // makes bookkeeping easier. |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 6657 | if (isa<FunctionDecl>(Member)) { |
Douglas Gregor | f6b1185 | 2009-10-08 15:14:33 +0000 | [diff] [blame] | 6658 | FunctionDecl *InstantiationFunction = cast<FunctionDecl>(Instantiation); |
| 6659 | if (InstantiationFunction->getTemplateSpecializationKind() == |
| 6660 | TSK_ImplicitInstantiation) { |
| 6661 | InstantiationFunction->setTemplateSpecializationKind( |
| 6662 | TSK_ExplicitSpecialization); |
| 6663 | InstantiationFunction->setLocation(Member->getLocation()); |
| 6664 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6665 | |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 6666 | cast<FunctionDecl>(Member)->setInstantiationOfMemberFunction( |
| 6667 | cast<CXXMethodDecl>(InstantiatedFrom), |
| 6668 | TSK_ExplicitSpecialization); |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 6669 | MarkUnusedFileScopedDecl(InstantiationFunction); |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 6670 | } else if (isa<VarDecl>(Member)) { |
Douglas Gregor | f6b1185 | 2009-10-08 15:14:33 +0000 | [diff] [blame] | 6671 | VarDecl *InstantiationVar = cast<VarDecl>(Instantiation); |
| 6672 | if (InstantiationVar->getTemplateSpecializationKind() == |
| 6673 | TSK_ImplicitInstantiation) { |
| 6674 | InstantiationVar->setTemplateSpecializationKind( |
| 6675 | TSK_ExplicitSpecialization); |
| 6676 | InstantiationVar->setLocation(Member->getLocation()); |
| 6677 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6678 | |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 6679 | cast<VarDecl>(Member)->setInstantiationOfStaticDataMember( |
| 6680 | cast<VarDecl>(InstantiatedFrom), TSK_ExplicitSpecialization); |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 6681 | MarkUnusedFileScopedDecl(InstantiationVar); |
Richard Smith | 1af83c4 | 2012-03-23 03:33:32 +0000 | [diff] [blame] | 6682 | } else if (isa<CXXRecordDecl>(Member)) { |
Douglas Gregor | f6b1185 | 2009-10-08 15:14:33 +0000 | [diff] [blame] | 6683 | CXXRecordDecl *InstantiationClass = cast<CXXRecordDecl>(Instantiation); |
| 6684 | if (InstantiationClass->getTemplateSpecializationKind() == |
| 6685 | TSK_ImplicitInstantiation) { |
| 6686 | InstantiationClass->setTemplateSpecializationKind( |
| 6687 | TSK_ExplicitSpecialization); |
| 6688 | InstantiationClass->setLocation(Member->getLocation()); |
| 6689 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6690 | |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 6691 | cast<CXXRecordDecl>(Member)->setInstantiationOfMemberClass( |
Douglas Gregor | f6b1185 | 2009-10-08 15:14:33 +0000 | [diff] [blame] | 6692 | cast<CXXRecordDecl>(InstantiatedFrom), |
| 6693 | TSK_ExplicitSpecialization); |
Richard Smith | 1af83c4 | 2012-03-23 03:33:32 +0000 | [diff] [blame] | 6694 | } else { |
| 6695 | assert(isa<EnumDecl>(Member) && "Only member enums remain"); |
| 6696 | EnumDecl *InstantiationEnum = cast<EnumDecl>(Instantiation); |
| 6697 | if (InstantiationEnum->getTemplateSpecializationKind() == |
| 6698 | TSK_ImplicitInstantiation) { |
| 6699 | InstantiationEnum->setTemplateSpecializationKind( |
| 6700 | TSK_ExplicitSpecialization); |
| 6701 | InstantiationEnum->setLocation(Member->getLocation()); |
| 6702 | } |
| 6703 | |
| 6704 | cast<EnumDecl>(Member)->setInstantiationOfMemberEnum( |
| 6705 | cast<EnumDecl>(InstantiatedFrom), TSK_ExplicitSpecialization); |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 6706 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6707 | |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 6708 | // Save the caller the trouble of having to figure out which declaration |
| 6709 | // this specialization matches. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6710 | Previous.clear(); |
| 6711 | Previous.addDecl(Instantiation); |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 6712 | return false; |
| 6713 | } |
| 6714 | |
Douglas Gregor | 558c032 | 2009-10-14 23:41:34 +0000 | [diff] [blame] | 6715 | /// \brief Check the scope of an explicit instantiation. |
Douglas Gregor | 669eed8 | 2010-07-13 00:10:04 +0000 | [diff] [blame] | 6716 | /// |
| 6717 | /// \returns true if a serious error occurs, false otherwise. |
| 6718 | static bool CheckExplicitInstantiationScope(Sema &S, NamedDecl *D, |
Douglas Gregor | 558c032 | 2009-10-14 23:41:34 +0000 | [diff] [blame] | 6719 | SourceLocation InstLoc, |
| 6720 | bool WasQualifiedName) { |
Sebastian Redl | 7a126a4 | 2010-08-31 00:36:30 +0000 | [diff] [blame] | 6721 | DeclContext *OrigContext= D->getDeclContext()->getEnclosingNamespaceContext(); |
| 6722 | DeclContext *CurContext = S.CurContext->getRedeclContext(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6723 | |
Douglas Gregor | 669eed8 | 2010-07-13 00:10:04 +0000 | [diff] [blame] | 6724 | if (CurContext->isRecord()) { |
| 6725 | S.Diag(InstLoc, diag::err_explicit_instantiation_in_class) |
| 6726 | << D; |
| 6727 | return true; |
| 6728 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6729 | |
Richard Smith | 3e2e91e | 2011-10-18 02:28:33 +0000 | [diff] [blame] | 6730 | // C++11 [temp.explicit]p3: |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6731 | // An explicit instantiation shall appear in an enclosing namespace of its |
Richard Smith | 3e2e91e | 2011-10-18 02:28:33 +0000 | [diff] [blame] | 6732 | // template. If the name declared in the explicit instantiation is an |
| 6733 | // unqualified name, the explicit instantiation shall appear in the |
| 6734 | // namespace where its template is declared or, if that namespace is inline |
| 6735 | // (7.3.1), any namespace from its enclosing namespace set. |
Douglas Gregor | 558c032 | 2009-10-14 23:41:34 +0000 | [diff] [blame] | 6736 | // |
| 6737 | // This is DR275, which we do not retroactively apply to C++98/03. |
Richard Smith | 3e2e91e | 2011-10-18 02:28:33 +0000 | [diff] [blame] | 6738 | if (WasQualifiedName) { |
| 6739 | if (CurContext->Encloses(OrigContext)) |
| 6740 | return false; |
| 6741 | } else { |
| 6742 | if (CurContext->InEnclosingNamespaceSetOf(OrigContext)) |
| 6743 | return false; |
| 6744 | } |
| 6745 | |
| 6746 | if (NamespaceDecl *NS = dyn_cast<NamespaceDecl>(OrigContext)) { |
| 6747 | if (WasQualifiedName) |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6748 | S.Diag(InstLoc, |
Richard Smith | 80ad52f | 2013-01-02 11:42:31 +0000 | [diff] [blame] | 6749 | S.getLangOpts().CPlusPlus11? |
Richard Smith | 3e2e91e | 2011-10-18 02:28:33 +0000 | [diff] [blame] | 6750 | diag::err_explicit_instantiation_out_of_scope : |
| 6751 | diag::warn_explicit_instantiation_out_of_scope_0x) |
Douglas Gregor | 558c032 | 2009-10-14 23:41:34 +0000 | [diff] [blame] | 6752 | << D << NS; |
| 6753 | else |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6754 | S.Diag(InstLoc, |
Richard Smith | 80ad52f | 2013-01-02 11:42:31 +0000 | [diff] [blame] | 6755 | S.getLangOpts().CPlusPlus11? |
Richard Smith | 3e2e91e | 2011-10-18 02:28:33 +0000 | [diff] [blame] | 6756 | diag::err_explicit_instantiation_unqualified_wrong_namespace : |
| 6757 | diag::warn_explicit_instantiation_unqualified_wrong_namespace_0x) |
| 6758 | << D << NS; |
| 6759 | } else |
| 6760 | S.Diag(InstLoc, |
Richard Smith | 80ad52f | 2013-01-02 11:42:31 +0000 | [diff] [blame] | 6761 | S.getLangOpts().CPlusPlus11? |
Richard Smith | 3e2e91e | 2011-10-18 02:28:33 +0000 | [diff] [blame] | 6762 | diag::err_explicit_instantiation_must_be_global : |
| 6763 | diag::warn_explicit_instantiation_must_be_global_0x) |
| 6764 | << D; |
Douglas Gregor | 558c032 | 2009-10-14 23:41:34 +0000 | [diff] [blame] | 6765 | S.Diag(D->getLocation(), diag::note_explicit_instantiation_here); |
Douglas Gregor | 669eed8 | 2010-07-13 00:10:04 +0000 | [diff] [blame] | 6766 | return false; |
Douglas Gregor | 558c032 | 2009-10-14 23:41:34 +0000 | [diff] [blame] | 6767 | } |
| 6768 | |
| 6769 | /// \brief Determine whether the given scope specifier has a template-id in it. |
| 6770 | static bool ScopeSpecifierHasTemplateId(const CXXScopeSpec &SS) { |
| 6771 | if (!SS.isSet()) |
| 6772 | return false; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6773 | |
Richard Smith | 3e2e91e | 2011-10-18 02:28:33 +0000 | [diff] [blame] | 6774 | // C++11 [temp.explicit]p3: |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6775 | // If the explicit instantiation is for a member function, a member class |
Douglas Gregor | 558c032 | 2009-10-14 23:41:34 +0000 | [diff] [blame] | 6776 | // or a static data member of a class template specialization, the name of |
| 6777 | // the class template specialization in the qualified-id for the member |
| 6778 | // name shall be a simple-template-id. |
| 6779 | // |
| 6780 | // C++98 has the same restriction, just worded differently. |
| 6781 | for (NestedNameSpecifier *NNS = (NestedNameSpecifier *)SS.getScopeRep(); |
| 6782 | NNS; NNS = NNS->getPrefix()) |
John McCall | f4c7371 | 2011-01-19 06:33:43 +0000 | [diff] [blame] | 6783 | if (const Type *T = NNS->getAsType()) |
Douglas Gregor | 558c032 | 2009-10-14 23:41:34 +0000 | [diff] [blame] | 6784 | if (isa<TemplateSpecializationType>(T)) |
| 6785 | return true; |
| 6786 | |
| 6787 | return false; |
| 6788 | } |
| 6789 | |
Douglas Gregor | 3f5b61c | 2009-05-14 00:28:11 +0000 | [diff] [blame] | 6790 | // Explicit instantiation of a class template specialization |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 6791 | DeclResult |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6792 | Sema::ActOnExplicitInstantiation(Scope *S, |
Douglas Gregor | 45f9655 | 2009-09-04 06:33:52 +0000 | [diff] [blame] | 6793 | SourceLocation ExternLoc, |
| 6794 | SourceLocation TemplateLoc, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6795 | unsigned TagSpec, |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 6796 | SourceLocation KWLoc, |
| 6797 | const CXXScopeSpec &SS, |
| 6798 | TemplateTy TemplateD, |
| 6799 | SourceLocation TemplateNameLoc, |
| 6800 | SourceLocation LAngleLoc, |
| 6801 | ASTTemplateArgsPtr TemplateArgsIn, |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 6802 | SourceLocation RAngleLoc, |
| 6803 | AttributeList *Attr) { |
| 6804 | // Find the class template we're specializing |
Serge Pavlov | 1806239 | 2013-08-27 13:15:56 +0000 | [diff] [blame] | 6805 | TemplateName Name = TemplateD.get(); |
Richard Smith | b1ce929 | 2013-06-22 22:03:31 +0000 | [diff] [blame] | 6806 | TemplateDecl *TD = Name.getAsTemplateDecl(); |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 6807 | // Check that the specialization uses the same tag kind as the |
| 6808 | // original template. |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 6809 | TagTypeKind Kind = TypeWithKeyword::getTagTypeKindForTypeSpec(TagSpec); |
| 6810 | assert(Kind != TTK_Enum && |
| 6811 | "Invalid enum tag in class template explicit instantiation!"); |
Richard Smith | b1ce929 | 2013-06-22 22:03:31 +0000 | [diff] [blame] | 6812 | |
| 6813 | if (isa<TypeAliasTemplateDecl>(TD)) { |
| 6814 | Diag(KWLoc, diag::err_tag_reference_non_tag) << Kind; |
| 6815 | Diag(TD->getTemplatedDecl()->getLocation(), |
| 6816 | diag::note_previous_use); |
| 6817 | return true; |
| 6818 | } |
| 6819 | |
| 6820 | ClassTemplateDecl *ClassTemplate = cast<ClassTemplateDecl>(TD); |
| 6821 | |
Douglas Gregor | 501c5ce | 2009-05-14 16:41:31 +0000 | [diff] [blame] | 6822 | if (!isAcceptableTagRedeclaration(ClassTemplate->getTemplatedDecl(), |
Richard Trieu | bbf34c0 | 2011-06-10 03:11:26 +0000 | [diff] [blame] | 6823 | Kind, /*isDefinition*/false, KWLoc, |
Douglas Gregor | 501c5ce | 2009-05-14 16:41:31 +0000 | [diff] [blame] | 6824 | *ClassTemplate->getIdentifier())) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6825 | Diag(KWLoc, diag::err_use_with_wrong_tag) |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 6826 | << ClassTemplate |
Douglas Gregor | 849b243 | 2010-03-31 17:46:05 +0000 | [diff] [blame] | 6827 | << FixItHint::CreateReplacement(KWLoc, |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 6828 | ClassTemplate->getTemplatedDecl()->getKindName()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6829 | Diag(ClassTemplate->getTemplatedDecl()->getLocation(), |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 6830 | diag::note_previous_use); |
| 6831 | Kind = ClassTemplate->getTemplatedDecl()->getTagKind(); |
| 6832 | } |
| 6833 | |
Douglas Gregor | 558c032 | 2009-10-14 23:41:34 +0000 | [diff] [blame] | 6834 | // C++0x [temp.explicit]p2: |
| 6835 | // There are two forms of explicit instantiation: an explicit instantiation |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6836 | // definition and an explicit instantiation declaration. An explicit |
| 6837 | // instantiation declaration begins with the extern keyword. [...] |
Douglas Gregor | d5cb876 | 2009-10-07 00:13:32 +0000 | [diff] [blame] | 6838 | TemplateSpecializationKind TSK |
| 6839 | = ExternLoc.isInvalid()? TSK_ExplicitInstantiationDefinition |
| 6840 | : TSK_ExplicitInstantiationDeclaration; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6841 | |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 6842 | // Translate the parser's template argument list in our AST format. |
John McCall | d5532b6 | 2009-11-23 01:53:49 +0000 | [diff] [blame] | 6843 | TemplateArgumentListInfo TemplateArgs(LAngleLoc, RAngleLoc); |
Douglas Gregor | 314b97f | 2009-11-10 19:49:08 +0000 | [diff] [blame] | 6844 | translateTemplateArguments(TemplateArgsIn, TemplateArgs); |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 6845 | |
| 6846 | // Check that the template argument list is well-formed for this |
| 6847 | // template. |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 6848 | SmallVector<TemplateArgument, 4> Converted; |
John McCall | d5532b6 | 2009-11-23 01:53:49 +0000 | [diff] [blame] | 6849 | if (CheckTemplateArgumentList(ClassTemplate, TemplateNameLoc, |
| 6850 | TemplateArgs, false, Converted)) |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 6851 | return true; |
| 6852 | |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 6853 | // Find the class template specialization declaration that |
| 6854 | // corresponds to these arguments. |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 6855 | void *InsertPos = 0; |
| 6856 | ClassTemplateSpecializationDecl *PrevDecl |
Douglas Gregor | 910f800 | 2010-11-07 23:05:16 +0000 | [diff] [blame] | 6857 | = ClassTemplate->findSpecialization(Converted.data(), |
| 6858 | Converted.size(), InsertPos); |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 6859 | |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 6860 | TemplateSpecializationKind PrevDecl_TSK |
| 6861 | = PrevDecl ? PrevDecl->getTemplateSpecializationKind() : TSK_Undeclared; |
| 6862 | |
Douglas Gregor | d5cb876 | 2009-10-07 00:13:32 +0000 | [diff] [blame] | 6863 | // C++0x [temp.explicit]p2: |
| 6864 | // [...] An explicit instantiation shall appear in an enclosing |
| 6865 | // namespace of its template. [...] |
| 6866 | // |
| 6867 | // This is C++ DR 275. |
Douglas Gregor | 669eed8 | 2010-07-13 00:10:04 +0000 | [diff] [blame] | 6868 | if (CheckExplicitInstantiationScope(*this, ClassTemplate, TemplateNameLoc, |
| 6869 | SS.isSet())) |
| 6870 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 6871 | |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 6872 | ClassTemplateSpecializationDecl *Specialization = 0; |
| 6873 | |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 6874 | bool HasNoEffect = false; |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 6875 | if (PrevDecl) { |
Douglas Gregor | 0d03514 | 2009-10-27 18:42:08 +0000 | [diff] [blame] | 6876 | if (CheckSpecializationInstantiationRedecl(TemplateNameLoc, TSK, |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 6877 | PrevDecl, PrevDecl_TSK, |
Douglas Gregor | 89a5bea | 2009-10-15 22:53:21 +0000 | [diff] [blame] | 6878 | PrevDecl->getPointOfInstantiation(), |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 6879 | HasNoEffect)) |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6880 | return PrevDecl; |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 6881 | |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 6882 | // Even though HasNoEffect == true means that this explicit instantiation |
| 6883 | // has no effect on semantics, we go on to put its syntax in the AST. |
| 6884 | |
| 6885 | if (PrevDecl_TSK == TSK_ImplicitInstantiation || |
| 6886 | PrevDecl_TSK == TSK_Undeclared) { |
Douglas Gregor | 52604ab | 2009-09-11 21:19:12 +0000 | [diff] [blame] | 6887 | // Since the only prior class template specialization with these |
| 6888 | // arguments was referenced but not declared, reuse that |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 6889 | // declaration node as our own, updating the source location |
| 6890 | // for the template name to reflect our new declaration. |
| 6891 | // (Other source locations will be updated later.) |
Douglas Gregor | 52604ab | 2009-09-11 21:19:12 +0000 | [diff] [blame] | 6892 | Specialization = PrevDecl; |
| 6893 | Specialization->setLocation(TemplateNameLoc); |
| 6894 | PrevDecl = 0; |
| 6895 | } |
Douglas Gregor | 89a5bea | 2009-10-15 22:53:21 +0000 | [diff] [blame] | 6896 | } |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 6897 | |
Douglas Gregor | 52604ab | 2009-09-11 21:19:12 +0000 | [diff] [blame] | 6898 | if (!Specialization) { |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 6899 | // Create a new class template specialization declaration node for |
| 6900 | // this explicit specialization. |
| 6901 | Specialization |
Douglas Gregor | 13c8577 | 2010-05-06 00:28:52 +0000 | [diff] [blame] | 6902 | = ClassTemplateSpecializationDecl::Create(Context, Kind, |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 6903 | ClassTemplate->getDeclContext(), |
Abramo Bagnara | ba877ad | 2011-03-09 14:09:51 +0000 | [diff] [blame] | 6904 | KWLoc, TemplateNameLoc, |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 6905 | ClassTemplate, |
Douglas Gregor | 910f800 | 2010-11-07 23:05:16 +0000 | [diff] [blame] | 6906 | Converted.data(), |
| 6907 | Converted.size(), |
| 6908 | PrevDecl); |
John McCall | b621766 | 2010-03-15 10:12:16 +0000 | [diff] [blame] | 6909 | SetNestedNameSpecifier(Specialization, SS); |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 6910 | |
Argyrios Kyrtzidis | cc0b1bc | 2010-07-20 13:59:28 +0000 | [diff] [blame] | 6911 | if (!HasNoEffect && !PrevDecl) { |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 6912 | // Insert the new specialization. |
Argyrios Kyrtzidis | cc0b1bc | 2010-07-20 13:59:28 +0000 | [diff] [blame] | 6913 | ClassTemplate->AddSpecialization(Specialization, InsertPos); |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 6914 | } |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 6915 | } |
| 6916 | |
| 6917 | // Build the fully-sugared type for this explicit instantiation as |
| 6918 | // the user wrote in the explicit instantiation itself. This means |
| 6919 | // that we'll pretty-print the type retrieved from the |
| 6920 | // specialization's declaration the way that the user actually wrote |
| 6921 | // the explicit instantiation, rather than formatting the name based |
| 6922 | // on the "canonical" representation used to store the template |
| 6923 | // arguments in the specialization. |
John McCall | 3cb0ebd | 2010-03-10 03:28:59 +0000 | [diff] [blame] | 6924 | TypeSourceInfo *WrittenTy |
| 6925 | = Context.getTemplateSpecializationTypeInfo(Name, TemplateNameLoc, |
| 6926 | TemplateArgs, |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 6927 | Context.getTypeDeclType(Specialization)); |
| 6928 | Specialization->setTypeAsWritten(WrittenTy); |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 6929 | |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 6930 | // Set source locations for keywords. |
| 6931 | Specialization->setExternLoc(ExternLoc); |
| 6932 | Specialization->setTemplateKeywordLoc(TemplateLoc); |
Argyrios Kyrtzidis | 2fb5d12 | 2013-04-22 23:23:42 +0000 | [diff] [blame] | 6933 | Specialization->setRBraceLoc(SourceLocation()); |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 6934 | |
Rafael Espindola | 0257b7f | 2012-01-03 06:04:21 +0000 | [diff] [blame] | 6935 | if (Attr) |
| 6936 | ProcessDeclAttributeList(S, Specialization, Attr); |
| 6937 | |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 6938 | // Add the explicit instantiation into its lexical context. However, |
| 6939 | // since explicit instantiations are never found by name lookup, we |
| 6940 | // just put it into the declaration context directly. |
| 6941 | Specialization->setLexicalDeclContext(CurContext); |
| 6942 | CurContext->addDecl(Specialization); |
| 6943 | |
| 6944 | // Syntax is now OK, so return if it has no other effect on semantics. |
| 6945 | if (HasNoEffect) { |
| 6946 | // Set the template specialization kind. |
| 6947 | Specialization->setTemplateSpecializationKind(TSK); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6948 | return Specialization; |
Douglas Gregor | d78f598 | 2009-11-25 06:01:46 +0000 | [diff] [blame] | 6949 | } |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 6950 | |
| 6951 | // C++ [temp.explicit]p3: |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 6952 | // A definition of a class template or class member template |
| 6953 | // shall be in scope at the point of the explicit instantiation of |
| 6954 | // the class template or class member template. |
| 6955 | // |
| 6956 | // This check comes when we actually try to perform the |
| 6957 | // instantiation. |
Douglas Gregor | 89a5bea | 2009-10-15 22:53:21 +0000 | [diff] [blame] | 6958 | ClassTemplateSpecializationDecl *Def |
| 6959 | = cast_or_null<ClassTemplateSpecializationDecl>( |
Douglas Gregor | 952b017 | 2010-02-11 01:04:33 +0000 | [diff] [blame] | 6960 | Specialization->getDefinition()); |
Douglas Gregor | 89a5bea | 2009-10-15 22:53:21 +0000 | [diff] [blame] | 6961 | if (!Def) |
Douglas Gregor | 972e6ce | 2009-10-27 06:26:26 +0000 | [diff] [blame] | 6962 | InstantiateClassTemplateSpecialization(TemplateNameLoc, Specialization, TSK); |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 6963 | else if (TSK == TSK_ExplicitInstantiationDefinition) { |
Douglas Gregor | 6fb745b | 2010-05-13 16:44:06 +0000 | [diff] [blame] | 6964 | MarkVTableUsed(TemplateNameLoc, Specialization, true); |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 6965 | Specialization->setPointOfInstantiation(Def->getPointOfInstantiation()); |
| 6966 | } |
Douglas Gregor | 6fb745b | 2010-05-13 16:44:06 +0000 | [diff] [blame] | 6967 | |
Douglas Gregor | 0d03514 | 2009-10-27 18:42:08 +0000 | [diff] [blame] | 6968 | // Instantiate the members of this class template specialization. |
| 6969 | Def = cast_or_null<ClassTemplateSpecializationDecl>( |
Douglas Gregor | 952b017 | 2010-02-11 01:04:33 +0000 | [diff] [blame] | 6970 | Specialization->getDefinition()); |
Rafael Espindola | b0f65ca | 2010-03-22 23:12:48 +0000 | [diff] [blame] | 6971 | if (Def) { |
Rafael Espindola | f075b22 | 2010-03-23 19:55:22 +0000 | [diff] [blame] | 6972 | TemplateSpecializationKind Old_TSK = Def->getTemplateSpecializationKind(); |
| 6973 | |
| 6974 | // Fix a TSK_ExplicitInstantiationDeclaration followed by a |
| 6975 | // TSK_ExplicitInstantiationDefinition |
| 6976 | if (Old_TSK == TSK_ExplicitInstantiationDeclaration && |
| 6977 | TSK == TSK_ExplicitInstantiationDefinition) |
| 6978 | Def->setTemplateSpecializationKind(TSK); |
Rafael Espindola | b0f65ca | 2010-03-22 23:12:48 +0000 | [diff] [blame] | 6979 | |
Douglas Gregor | 89a5bea | 2009-10-15 22:53:21 +0000 | [diff] [blame] | 6980 | InstantiateClassTemplateSpecializationMembers(TemplateNameLoc, Def, TSK); |
Rafael Espindola | b0f65ca | 2010-03-22 23:12:48 +0000 | [diff] [blame] | 6981 | } |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 6982 | |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 6983 | // Set the template specialization kind. |
| 6984 | Specialization->setTemplateSpecializationKind(TSK); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6985 | return Specialization; |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 6986 | } |
| 6987 | |
Douglas Gregor | 3f5b61c | 2009-05-14 00:28:11 +0000 | [diff] [blame] | 6988 | // Explicit instantiation of a member class of a class template. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6989 | DeclResult |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6990 | Sema::ActOnExplicitInstantiation(Scope *S, |
Douglas Gregor | 45f9655 | 2009-09-04 06:33:52 +0000 | [diff] [blame] | 6991 | SourceLocation ExternLoc, |
| 6992 | SourceLocation TemplateLoc, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6993 | unsigned TagSpec, |
Douglas Gregor | 3f5b61c | 2009-05-14 00:28:11 +0000 | [diff] [blame] | 6994 | SourceLocation KWLoc, |
Jeffrey Yasskin | 9ab1454 | 2010-04-08 16:38:48 +0000 | [diff] [blame] | 6995 | CXXScopeSpec &SS, |
Douglas Gregor | 3f5b61c | 2009-05-14 00:28:11 +0000 | [diff] [blame] | 6996 | IdentifierInfo *Name, |
| 6997 | SourceLocation NameLoc, |
| 6998 | AttributeList *Attr) { |
| 6999 | |
Douglas Gregor | 402abb5 | 2009-05-28 23:31:59 +0000 | [diff] [blame] | 7000 | bool Owned = false; |
John McCall | c4e7019 | 2009-09-11 04:59:25 +0000 | [diff] [blame] | 7001 | bool IsDependent = false; |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 7002 | Decl *TagD = ActOnTag(S, TagSpec, Sema::TUK_Reference, |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7003 | KWLoc, SS, Name, NameLoc, Attr, AS_none, |
Douglas Gregor | e761230 | 2011-09-09 19:05:14 +0000 | [diff] [blame] | 7004 | /*ModulePrivateLoc=*/SourceLocation(), |
Benjamin Kramer | 5354e77 | 2012-08-23 23:38:35 +0000 | [diff] [blame] | 7005 | MultiTemplateParamsArg(), Owned, IsDependent, |
| 7006 | SourceLocation(), false, TypeResult()); |
John McCall | c4e7019 | 2009-09-11 04:59:25 +0000 | [diff] [blame] | 7007 | assert(!IsDependent && "explicit instantiation of dependent name not yet handled"); |
| 7008 | |
Douglas Gregor | 3f5b61c | 2009-05-14 00:28:11 +0000 | [diff] [blame] | 7009 | if (!TagD) |
| 7010 | return true; |
| 7011 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7012 | TagDecl *Tag = cast<TagDecl>(TagD); |
Richard Smith | 1af83c4 | 2012-03-23 03:33:32 +0000 | [diff] [blame] | 7013 | assert(!Tag->isEnum() && "shouldn't see enumerations here"); |
Douglas Gregor | 3f5b61c | 2009-05-14 00:28:11 +0000 | [diff] [blame] | 7014 | |
Douglas Gregor | d0c8737 | 2009-05-27 17:30:49 +0000 | [diff] [blame] | 7015 | if (Tag->isInvalidDecl()) |
| 7016 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7017 | |
Douglas Gregor | 3f5b61c | 2009-05-14 00:28:11 +0000 | [diff] [blame] | 7018 | CXXRecordDecl *Record = cast<CXXRecordDecl>(Tag); |
| 7019 | CXXRecordDecl *Pattern = Record->getInstantiatedFromMemberClass(); |
| 7020 | if (!Pattern) { |
| 7021 | Diag(TemplateLoc, diag::err_explicit_instantiation_nontemplate_type) |
| 7022 | << Context.getTypeDeclType(Record); |
| 7023 | Diag(Record->getLocation(), diag::note_nontemplate_decl_here); |
| 7024 | return true; |
| 7025 | } |
| 7026 | |
Douglas Gregor | 558c032 | 2009-10-14 23:41:34 +0000 | [diff] [blame] | 7027 | // C++0x [temp.explicit]p2: |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7028 | // If the explicit instantiation is for a class or member class, the |
| 7029 | // elaborated-type-specifier in the declaration shall include a |
Douglas Gregor | 558c032 | 2009-10-14 23:41:34 +0000 | [diff] [blame] | 7030 | // simple-template-id. |
| 7031 | // |
| 7032 | // C++98 has the same restriction, just worded differently. |
| 7033 | if (!ScopeSpecifierHasTemplateId(SS)) |
Douglas Gregor | a2dd828 | 2010-06-16 16:26:47 +0000 | [diff] [blame] | 7034 | Diag(TemplateLoc, diag::ext_explicit_instantiation_without_qualified_id) |
Douglas Gregor | 558c032 | 2009-10-14 23:41:34 +0000 | [diff] [blame] | 7035 | << Record << SS.getRange(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7036 | |
Douglas Gregor | 558c032 | 2009-10-14 23:41:34 +0000 | [diff] [blame] | 7037 | // C++0x [temp.explicit]p2: |
| 7038 | // There are two forms of explicit instantiation: an explicit instantiation |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7039 | // definition and an explicit instantiation declaration. An explicit |
Douglas Gregor | 558c032 | 2009-10-14 23:41:34 +0000 | [diff] [blame] | 7040 | // instantiation declaration begins with the extern keyword. [...] |
Douglas Gregor | a74bbe2 | 2009-10-14 21:46:58 +0000 | [diff] [blame] | 7041 | TemplateSpecializationKind TSK |
| 7042 | = ExternLoc.isInvalid()? TSK_ExplicitInstantiationDefinition |
| 7043 | : TSK_ExplicitInstantiationDeclaration; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7044 | |
Douglas Gregor | 3f5b61c | 2009-05-14 00:28:11 +0000 | [diff] [blame] | 7045 | // C++0x [temp.explicit]p2: |
| 7046 | // [...] An explicit instantiation shall appear in an enclosing |
| 7047 | // namespace of its template. [...] |
| 7048 | // |
| 7049 | // This is C++ DR 275. |
Douglas Gregor | 558c032 | 2009-10-14 23:41:34 +0000 | [diff] [blame] | 7050 | CheckExplicitInstantiationScope(*this, Record, NameLoc, true); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7051 | |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 7052 | // Verify that it is okay to explicitly instantiate here. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7053 | CXXRecordDecl *PrevDecl |
Douglas Gregor | ef96ee0 | 2012-01-14 16:38:05 +0000 | [diff] [blame] | 7054 | = cast_or_null<CXXRecordDecl>(Record->getPreviousDecl()); |
Douglas Gregor | 952b017 | 2010-02-11 01:04:33 +0000 | [diff] [blame] | 7055 | if (!PrevDecl && Record->getDefinition()) |
Douglas Gregor | 583f33b | 2009-10-15 18:07:02 +0000 | [diff] [blame] | 7056 | PrevDecl = Record; |
| 7057 | if (PrevDecl) { |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 7058 | MemberSpecializationInfo *MSInfo = PrevDecl->getMemberSpecializationInfo(); |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 7059 | bool HasNoEffect = false; |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 7060 | assert(MSInfo && "No member specialization information?"); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7061 | if (CheckSpecializationInstantiationRedecl(TemplateLoc, TSK, |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 7062 | PrevDecl, |
| 7063 | MSInfo->getTemplateSpecializationKind(), |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7064 | MSInfo->getPointOfInstantiation(), |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 7065 | HasNoEffect)) |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 7066 | return true; |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 7067 | if (HasNoEffect) |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 7068 | return TagD; |
| 7069 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7070 | |
Douglas Gregor | 89a5bea | 2009-10-15 22:53:21 +0000 | [diff] [blame] | 7071 | CXXRecordDecl *RecordDef |
Douglas Gregor | 952b017 | 2010-02-11 01:04:33 +0000 | [diff] [blame] | 7072 | = cast_or_null<CXXRecordDecl>(Record->getDefinition()); |
Douglas Gregor | 89a5bea | 2009-10-15 22:53:21 +0000 | [diff] [blame] | 7073 | if (!RecordDef) { |
Douglas Gregor | bf7643e | 2009-10-15 12:53:22 +0000 | [diff] [blame] | 7074 | // C++ [temp.explicit]p3: |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7075 | // A definition of a member class of a class template shall be in scope |
Douglas Gregor | bf7643e | 2009-10-15 12:53:22 +0000 | [diff] [blame] | 7076 | // at the point of an explicit instantiation of the member class. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7077 | CXXRecordDecl *Def |
Douglas Gregor | 952b017 | 2010-02-11 01:04:33 +0000 | [diff] [blame] | 7078 | = cast_or_null<CXXRecordDecl>(Pattern->getDefinition()); |
Douglas Gregor | bf7643e | 2009-10-15 12:53:22 +0000 | [diff] [blame] | 7079 | if (!Def) { |
Douglas Gregor | e2d3a3d | 2009-10-15 14:05:49 +0000 | [diff] [blame] | 7080 | Diag(TemplateLoc, diag::err_explicit_instantiation_undefined_member) |
| 7081 | << 0 << Record->getDeclName() << Record->getDeclContext(); |
Douglas Gregor | bf7643e | 2009-10-15 12:53:22 +0000 | [diff] [blame] | 7082 | Diag(Pattern->getLocation(), diag::note_forward_declaration) |
| 7083 | << Pattern; |
| 7084 | return true; |
Douglas Gregor | 0d03514 | 2009-10-27 18:42:08 +0000 | [diff] [blame] | 7085 | } else { |
| 7086 | if (InstantiateClass(NameLoc, Record, Def, |
| 7087 | getTemplateInstantiationArgs(Record), |
| 7088 | TSK)) |
| 7089 | return true; |
| 7090 | |
Douglas Gregor | 952b017 | 2010-02-11 01:04:33 +0000 | [diff] [blame] | 7091 | RecordDef = cast_or_null<CXXRecordDecl>(Record->getDefinition()); |
Douglas Gregor | 0d03514 | 2009-10-27 18:42:08 +0000 | [diff] [blame] | 7092 | if (!RecordDef) |
| 7093 | return true; |
| 7094 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7095 | } |
| 7096 | |
Douglas Gregor | 0d03514 | 2009-10-27 18:42:08 +0000 | [diff] [blame] | 7097 | // Instantiate all of the members of the class. |
| 7098 | InstantiateClassMembers(NameLoc, RecordDef, |
| 7099 | getTemplateInstantiationArgs(Record), TSK); |
Douglas Gregor | 3f5b61c | 2009-05-14 00:28:11 +0000 | [diff] [blame] | 7100 | |
Douglas Gregor | 6fb745b | 2010-05-13 16:44:06 +0000 | [diff] [blame] | 7101 | if (TSK == TSK_ExplicitInstantiationDefinition) |
| 7102 | MarkVTableUsed(NameLoc, RecordDef, true); |
| 7103 | |
Mike Stump | 390b4cc | 2009-05-16 07:39:55 +0000 | [diff] [blame] | 7104 | // FIXME: We don't have any representation for explicit instantiations of |
| 7105 | // member classes. Such a representation is not needed for compilation, but it |
| 7106 | // should be available for clients that want to see all of the declarations in |
| 7107 | // the source code. |
Douglas Gregor | 3f5b61c | 2009-05-14 00:28:11 +0000 | [diff] [blame] | 7108 | return TagD; |
| 7109 | } |
| 7110 | |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 7111 | DeclResult Sema::ActOnExplicitInstantiation(Scope *S, |
| 7112 | SourceLocation ExternLoc, |
| 7113 | SourceLocation TemplateLoc, |
| 7114 | Declarator &D) { |
Douglas Gregor | d5a423b | 2009-09-25 18:43:00 +0000 | [diff] [blame] | 7115 | // Explicit instantiations always require a name. |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 7116 | // TODO: check if/when DNInfo should replace Name. |
| 7117 | DeclarationNameInfo NameInfo = GetNameForDeclarator(D); |
| 7118 | DeclarationName Name = NameInfo.getName(); |
Douglas Gregor | d5a423b | 2009-09-25 18:43:00 +0000 | [diff] [blame] | 7119 | if (!Name) { |
| 7120 | if (!D.isInvalidType()) |
Daniel Dunbar | 96a0014 | 2012-03-09 18:35:03 +0000 | [diff] [blame] | 7121 | Diag(D.getDeclSpec().getLocStart(), |
Douglas Gregor | d5a423b | 2009-09-25 18:43:00 +0000 | [diff] [blame] | 7122 | diag::err_explicit_instantiation_requires_name) |
| 7123 | << D.getDeclSpec().getSourceRange() |
| 7124 | << D.getSourceRange(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7125 | |
Douglas Gregor | d5a423b | 2009-09-25 18:43:00 +0000 | [diff] [blame] | 7126 | return true; |
| 7127 | } |
| 7128 | |
| 7129 | // The scope passed in may not be a decl scope. Zip up the scope tree until |
| 7130 | // we find one that is. |
| 7131 | while ((S->getFlags() & Scope::DeclScope) == 0 || |
| 7132 | (S->getFlags() & Scope::TemplateParamScope) != 0) |
| 7133 | S = S->getParent(); |
| 7134 | |
| 7135 | // Determine the type of the declaration. |
John McCall | bf1a028 | 2010-06-04 23:28:52 +0000 | [diff] [blame] | 7136 | TypeSourceInfo *T = GetTypeForDeclarator(D, S); |
| 7137 | QualType R = T->getType(); |
Douglas Gregor | d5a423b | 2009-09-25 18:43:00 +0000 | [diff] [blame] | 7138 | if (R.isNull()) |
| 7139 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7140 | |
Douglas Gregor | e885e18 | 2011-05-21 18:53:30 +0000 | [diff] [blame] | 7141 | // C++ [dcl.stc]p1: |
| 7142 | // A storage-class-specifier shall not be specified in [...] an explicit |
| 7143 | // instantiation (14.7.2) directive. |
Douglas Gregor | d5a423b | 2009-09-25 18:43:00 +0000 | [diff] [blame] | 7144 | if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) { |
Douglas Gregor | d5a423b | 2009-09-25 18:43:00 +0000 | [diff] [blame] | 7145 | Diag(D.getIdentifierLoc(), diag::err_explicit_instantiation_of_typedef) |
| 7146 | << Name; |
| 7147 | return true; |
Douglas Gregor | e885e18 | 2011-05-21 18:53:30 +0000 | [diff] [blame] | 7148 | } else if (D.getDeclSpec().getStorageClassSpec() |
| 7149 | != DeclSpec::SCS_unspecified) { |
| 7150 | // Complain about then remove the storage class specifier. |
| 7151 | Diag(D.getIdentifierLoc(), diag::err_explicit_instantiation_storage_class) |
| 7152 | << FixItHint::CreateRemoval(D.getDeclSpec().getStorageClassSpecLoc()); |
| 7153 | |
| 7154 | D.getMutableDeclSpec().ClearStorageClassSpecs(); |
Douglas Gregor | d5a423b | 2009-09-25 18:43:00 +0000 | [diff] [blame] | 7155 | } |
| 7156 | |
Douglas Gregor | 663b5a0 | 2009-10-14 20:14:33 +0000 | [diff] [blame] | 7157 | // C++0x [temp.explicit]p1: |
| 7158 | // [...] An explicit instantiation of a function template shall not use the |
| 7159 | // inline or constexpr specifiers. |
| 7160 | // Presumably, this also applies to member functions of class templates as |
| 7161 | // well. |
Richard Smith | 2dc7ece | 2011-10-18 03:44:03 +0000 | [diff] [blame] | 7162 | if (D.getDeclSpec().isInlineSpecified()) |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7163 | Diag(D.getDeclSpec().getInlineSpecLoc(), |
Richard Smith | 80ad52f | 2013-01-02 11:42:31 +0000 | [diff] [blame] | 7164 | getLangOpts().CPlusPlus11 ? |
Richard Smith | 2dc7ece | 2011-10-18 03:44:03 +0000 | [diff] [blame] | 7165 | diag::err_explicit_instantiation_inline : |
| 7166 | diag::warn_explicit_instantiation_inline_0x) |
Richard Smith | fe6f648 | 2011-10-14 19:58:02 +0000 | [diff] [blame] | 7167 | << FixItHint::CreateRemoval(D.getDeclSpec().getInlineSpecLoc()); |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 7168 | if (D.getDeclSpec().isConstexprSpecified() && R->isFunctionType()) |
Richard Smith | fe6f648 | 2011-10-14 19:58:02 +0000 | [diff] [blame] | 7169 | // FIXME: Add a fix-it to remove the 'constexpr' and add a 'const' if one is |
| 7170 | // not already specified. |
| 7171 | Diag(D.getDeclSpec().getConstexprSpecLoc(), |
| 7172 | diag::err_explicit_instantiation_constexpr); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7173 | |
Douglas Gregor | 558c032 | 2009-10-14 23:41:34 +0000 | [diff] [blame] | 7174 | // C++0x [temp.explicit]p2: |
| 7175 | // There are two forms of explicit instantiation: an explicit instantiation |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7176 | // definition and an explicit instantiation declaration. An explicit |
| 7177 | // instantiation declaration begins with the extern keyword. [...] |
Douglas Gregor | d5a423b | 2009-09-25 18:43:00 +0000 | [diff] [blame] | 7178 | TemplateSpecializationKind TSK |
| 7179 | = ExternLoc.isInvalid()? TSK_ExplicitInstantiationDefinition |
| 7180 | : TSK_ExplicitInstantiationDeclaration; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7181 | |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 7182 | LookupResult Previous(*this, NameInfo, LookupOrdinaryName); |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 7183 | LookupParsedName(Previous, S, &D.getCXXScopeSpec()); |
Douglas Gregor | d5a423b | 2009-09-25 18:43:00 +0000 | [diff] [blame] | 7184 | |
| 7185 | if (!R->isFunctionType()) { |
| 7186 | // C++ [temp.explicit]p1: |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7187 | // A [...] static data member of a class template can be explicitly |
| 7188 | // instantiated from the member definition associated with its class |
Douglas Gregor | d5a423b | 2009-09-25 18:43:00 +0000 | [diff] [blame] | 7189 | // template. |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 7190 | // C++1y [temp.explicit]p1: |
| 7191 | // A [...] variable [...] template specialization can be explicitly |
| 7192 | // instantiated from its template. |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 7193 | if (Previous.isAmbiguous()) |
| 7194 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7195 | |
John McCall | 1bcee0a | 2009-12-02 08:25:40 +0000 | [diff] [blame] | 7196 | VarDecl *Prev = Previous.getAsSingle<VarDecl>(); |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 7197 | VarTemplateDecl *PrevTemplate = Previous.getAsSingle<VarTemplateDecl>(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7198 | |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 7199 | if (!PrevTemplate) { |
| 7200 | if (!Prev || !Prev->isStaticDataMember()) { |
| 7201 | // We expect to see a data data member here. |
| 7202 | Diag(D.getIdentifierLoc(), diag::err_explicit_instantiation_not_known) |
| 7203 | << Name; |
| 7204 | for (LookupResult::iterator P = Previous.begin(), PEnd = Previous.end(); |
| 7205 | P != PEnd; ++P) |
| 7206 | Diag((*P)->getLocation(), diag::note_explicit_instantiation_here); |
| 7207 | return true; |
| 7208 | } |
| 7209 | |
| 7210 | if (!Prev->getInstantiatedFromStaticDataMember()) { |
| 7211 | // FIXME: Check for explicit specialization? |
| 7212 | Diag(D.getIdentifierLoc(), |
| 7213 | diag::err_explicit_instantiation_data_member_not_instantiated) |
| 7214 | << Prev; |
| 7215 | Diag(Prev->getLocation(), diag::note_explicit_instantiation_here); |
| 7216 | // FIXME: Can we provide a note showing where this was declared? |
| 7217 | return true; |
| 7218 | } |
| 7219 | } else { |
| 7220 | // Explicitly instantiate a variable template. |
| 7221 | |
| 7222 | // C++1y [dcl.spec.auto]p6: |
| 7223 | // ... A program that uses auto or decltype(auto) in a context not |
| 7224 | // explicitly allowed in this section is ill-formed. |
| 7225 | // |
| 7226 | // This includes auto-typed variable template instantiations. |
| 7227 | if (R->isUndeducedType()) { |
| 7228 | Diag(T->getTypeLoc().getLocStart(), |
| 7229 | diag::err_auto_not_allowed_var_inst); |
| 7230 | return true; |
| 7231 | } |
| 7232 | |
| 7233 | TemplateArgumentListInfo TemplateArgs; |
| 7234 | if (D.getName().getKind() == UnqualifiedId::IK_TemplateId) { |
| 7235 | // Translate the parser's template argument list into our AST format. |
| 7236 | TemplateIdAnnotation *TemplateId = D.getName().TemplateId; |
| 7237 | TemplateArgs.setLAngleLoc(TemplateId->LAngleLoc); |
| 7238 | TemplateArgs.setRAngleLoc(TemplateId->RAngleLoc); |
| 7239 | ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(), |
| 7240 | TemplateId->NumArgs); |
| 7241 | translateTemplateArguments(TemplateArgsPtr, TemplateArgs); |
| 7242 | } |
| 7243 | |
| 7244 | DeclResult Res = CheckVarTemplateId(PrevTemplate, TemplateLoc, |
| 7245 | D.getIdentifierLoc(), TemplateArgs); |
| 7246 | if (Res.isInvalid()) |
| 7247 | return true; |
| 7248 | |
| 7249 | // Ignore access control bits, we don't need them for redeclaration |
| 7250 | // checking. |
| 7251 | Prev = cast<VarDecl>(Res.get()); |
Douglas Gregor | d5a423b | 2009-09-25 18:43:00 +0000 | [diff] [blame] | 7252 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7253 | |
Douglas Gregor | 558c032 | 2009-10-14 23:41:34 +0000 | [diff] [blame] | 7254 | // C++0x [temp.explicit]p2: |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7255 | // If the explicit instantiation is for a member function, a member class |
Douglas Gregor | 558c032 | 2009-10-14 23:41:34 +0000 | [diff] [blame] | 7256 | // or a static data member of a class template specialization, the name of |
| 7257 | // the class template specialization in the qualified-id for the member |
| 7258 | // name shall be a simple-template-id. |
| 7259 | // |
| 7260 | // C++98 has the same restriction, just worded differently. |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 7261 | // |
| 7262 | // C++1y If the explicit instantiation is for a variable, the |
| 7263 | // unqualified-id in the declaration shall be a template-id. |
| 7264 | if (!ScopeSpecifierHasTemplateId(D.getCXXScopeSpec()) && |
| 7265 | (!PrevTemplate || |
| 7266 | (D.getName().getKind() != UnqualifiedId::IK_TemplateId && |
| 7267 | D.getCXXScopeSpec().isSet()))) |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7268 | Diag(D.getIdentifierLoc(), |
Douglas Gregor | a2dd828 | 2010-06-16 16:26:47 +0000 | [diff] [blame] | 7269 | diag::ext_explicit_instantiation_without_qualified_id) |
Douglas Gregor | 558c032 | 2009-10-14 23:41:34 +0000 | [diff] [blame] | 7270 | << Prev << D.getCXXScopeSpec().getRange(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7271 | |
Douglas Gregor | 558c032 | 2009-10-14 23:41:34 +0000 | [diff] [blame] | 7272 | // Check the scope of this explicit instantiation. |
| 7273 | CheckExplicitInstantiationScope(*this, Prev, D.getIdentifierLoc(), true); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7274 | |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 7275 | // Verify that it is okay to explicitly instantiate here. |
| 7276 | MemberSpecializationInfo *MSInfo = Prev->getMemberSpecializationInfo(); |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 7277 | TemplateSpecializationKind PrevTSK = |
| 7278 | MSInfo ? MSInfo->getTemplateSpecializationKind() |
| 7279 | : Prev->getTemplateSpecializationKind(); |
| 7280 | SourceLocation POI = MSInfo ? MSInfo->getPointOfInstantiation() |
| 7281 | : cast<VarTemplateSpecializationDecl>(Prev) |
| 7282 | ->getPointOfInstantiation(); |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 7283 | bool HasNoEffect = false; |
Douglas Gregor | 0d03514 | 2009-10-27 18:42:08 +0000 | [diff] [blame] | 7284 | if (CheckSpecializationInstantiationRedecl(D.getIdentifierLoc(), TSK, Prev, |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 7285 | PrevTSK, POI, HasNoEffect)) |
Douglas Gregor | 454885e | 2009-10-15 15:54:05 +0000 | [diff] [blame] | 7286 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7287 | |
Larisse Voufo | ef4579c | 2013-08-06 01:03:05 +0000 | [diff] [blame] | 7288 | if (!HasNoEffect) { |
| 7289 | // Instantiate static data member or variable template. |
| 7290 | |
| 7291 | Prev->setTemplateSpecializationKind(TSK, D.getIdentifierLoc()); |
| 7292 | if (PrevTemplate) { |
| 7293 | // Merge attributes. |
| 7294 | if (AttributeList *Attr = D.getDeclSpec().getAttributes().getList()) |
| 7295 | ProcessDeclAttributeList(S, Prev, Attr); |
| 7296 | } |
| 7297 | if (TSK == TSK_ExplicitInstantiationDefinition) |
| 7298 | InstantiateVariableDefinition(D.getIdentifierLoc(), Prev); |
| 7299 | } |
| 7300 | |
| 7301 | // Check the new variable specialization against the parsed input. |
| 7302 | if (PrevTemplate && Prev && !Context.hasSameType(Prev->getType(), R)) { |
| 7303 | Diag(T->getTypeLoc().getLocStart(), |
| 7304 | diag::err_invalid_var_template_spec_type) |
| 7305 | << 0 << PrevTemplate << R << Prev->getType(); |
| 7306 | Diag(PrevTemplate->getLocation(), diag::note_template_declared_here) |
| 7307 | << 2 << PrevTemplate->getDeclName(); |
| 7308 | return true; |
| 7309 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7310 | |
Douglas Gregor | d5a423b | 2009-09-25 18:43:00 +0000 | [diff] [blame] | 7311 | // FIXME: Create an ExplicitInstantiation node? |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7312 | return (Decl*) 0; |
Douglas Gregor | d5a423b | 2009-09-25 18:43:00 +0000 | [diff] [blame] | 7313 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7314 | |
| 7315 | // If the declarator is a template-id, translate the parser's template |
Douglas Gregor | 0b60d9e | 2009-09-25 23:53:26 +0000 | [diff] [blame] | 7316 | // argument list into our AST format. |
Douglas Gregor | db422df | 2009-09-25 21:45:23 +0000 | [diff] [blame] | 7317 | bool HasExplicitTemplateArgs = false; |
John McCall | d5532b6 | 2009-11-23 01:53:49 +0000 | [diff] [blame] | 7318 | TemplateArgumentListInfo TemplateArgs; |
Douglas Gregor | 3f9a056 | 2009-11-03 01:35:08 +0000 | [diff] [blame] | 7319 | if (D.getName().getKind() == UnqualifiedId::IK_TemplateId) { |
| 7320 | TemplateIdAnnotation *TemplateId = D.getName().TemplateId; |
John McCall | d5532b6 | 2009-11-23 01:53:49 +0000 | [diff] [blame] | 7321 | TemplateArgs.setLAngleLoc(TemplateId->LAngleLoc); |
| 7322 | TemplateArgs.setRAngleLoc(TemplateId->RAngleLoc); |
Benjamin Kramer | 5354e77 | 2012-08-23 23:38:35 +0000 | [diff] [blame] | 7323 | ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(), |
Douglas Gregor | db422df | 2009-09-25 21:45:23 +0000 | [diff] [blame] | 7324 | TemplateId->NumArgs); |
John McCall | d5532b6 | 2009-11-23 01:53:49 +0000 | [diff] [blame] | 7325 | translateTemplateArguments(TemplateArgsPtr, TemplateArgs); |
Douglas Gregor | db422df | 2009-09-25 21:45:23 +0000 | [diff] [blame] | 7326 | HasExplicitTemplateArgs = true; |
| 7327 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7328 | |
Douglas Gregor | d5a423b | 2009-09-25 18:43:00 +0000 | [diff] [blame] | 7329 | // C++ [temp.explicit]p1: |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7330 | // A [...] function [...] can be explicitly instantiated from its template. |
| 7331 | // A member function [...] of a class template can be explicitly |
| 7332 | // instantiated from the member definition associated with its class |
Douglas Gregor | d5a423b | 2009-09-25 18:43:00 +0000 | [diff] [blame] | 7333 | // template. |
John McCall | c373d48 | 2010-01-27 01:50:18 +0000 | [diff] [blame] | 7334 | UnresolvedSet<8> Matches; |
Larisse Voufo | 4384712 | 2013-07-19 23:00:19 +0000 | [diff] [blame] | 7335 | TemplateSpecCandidateSet FailedCandidates(D.getIdentifierLoc()); |
Douglas Gregor | d5a423b | 2009-09-25 18:43:00 +0000 | [diff] [blame] | 7336 | for (LookupResult::iterator P = Previous.begin(), PEnd = Previous.end(); |
| 7337 | P != PEnd; ++P) { |
| 7338 | NamedDecl *Prev = *P; |
Douglas Gregor | db422df | 2009-09-25 21:45:23 +0000 | [diff] [blame] | 7339 | if (!HasExplicitTemplateArgs) { |
| 7340 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(Prev)) { |
| 7341 | if (Context.hasSameUnqualifiedType(Method->getType(), R)) { |
| 7342 | Matches.clear(); |
Douglas Gregor | 48026d2 | 2010-01-11 18:40:55 +0000 | [diff] [blame] | 7343 | |
John McCall | c373d48 | 2010-01-27 01:50:18 +0000 | [diff] [blame] | 7344 | Matches.addDecl(Method, P.getAccess()); |
Douglas Gregor | 48026d2 | 2010-01-11 18:40:55 +0000 | [diff] [blame] | 7345 | if (Method->getTemplateSpecializationKind() == TSK_Undeclared) |
| 7346 | break; |
Douglas Gregor | db422df | 2009-09-25 21:45:23 +0000 | [diff] [blame] | 7347 | } |
Douglas Gregor | d5a423b | 2009-09-25 18:43:00 +0000 | [diff] [blame] | 7348 | } |
| 7349 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7350 | |
Douglas Gregor | d5a423b | 2009-09-25 18:43:00 +0000 | [diff] [blame] | 7351 | FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(Prev); |
| 7352 | if (!FunTmpl) |
| 7353 | continue; |
| 7354 | |
Larisse Voufo | 4384712 | 2013-07-19 23:00:19 +0000 | [diff] [blame] | 7355 | TemplateDeductionInfo Info(FailedCandidates.getLocation()); |
Douglas Gregor | d5a423b | 2009-09-25 18:43:00 +0000 | [diff] [blame] | 7356 | FunctionDecl *Specialization = 0; |
| 7357 | if (TemplateDeductionResult TDK |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7358 | = DeduceTemplateArguments(FunTmpl, |
John McCall | d5532b6 | 2009-11-23 01:53:49 +0000 | [diff] [blame] | 7359 | (HasExplicitTemplateArgs ? &TemplateArgs : 0), |
Douglas Gregor | d5a423b | 2009-09-25 18:43:00 +0000 | [diff] [blame] | 7360 | R, Specialization, Info)) { |
Larisse Voufo | 4384712 | 2013-07-19 23:00:19 +0000 | [diff] [blame] | 7361 | // Keep track of almost-matches. |
| 7362 | FailedCandidates.addCandidate() |
| 7363 | .set(FunTmpl->getTemplatedDecl(), |
| 7364 | MakeDeductionFailureInfo(Context, TDK, Info)); |
Douglas Gregor | d5a423b | 2009-09-25 18:43:00 +0000 | [diff] [blame] | 7365 | (void)TDK; |
| 7366 | continue; |
| 7367 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7368 | |
John McCall | c373d48 | 2010-01-27 01:50:18 +0000 | [diff] [blame] | 7369 | Matches.addDecl(Specialization, P.getAccess()); |
Douglas Gregor | d5a423b | 2009-09-25 18:43:00 +0000 | [diff] [blame] | 7370 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7371 | |
Douglas Gregor | d5a423b | 2009-09-25 18:43:00 +0000 | [diff] [blame] | 7372 | // Find the most specialized function template specialization. |
Larisse Voufo | 4384712 | 2013-07-19 23:00:19 +0000 | [diff] [blame] | 7373 | UnresolvedSetIterator Result = getMostSpecialized( |
| 7374 | Matches.begin(), Matches.end(), FailedCandidates, TPOC_Other, 0, |
| 7375 | D.getIdentifierLoc(), |
| 7376 | PDiag(diag::err_explicit_instantiation_not_known) << Name, |
| 7377 | PDiag(diag::err_explicit_instantiation_ambiguous) << Name, |
| 7378 | PDiag(diag::note_explicit_instantiation_candidate)); |
Douglas Gregor | d5a423b | 2009-09-25 18:43:00 +0000 | [diff] [blame] | 7379 | |
John McCall | c373d48 | 2010-01-27 01:50:18 +0000 | [diff] [blame] | 7380 | if (Result == Matches.end()) |
Douglas Gregor | d5a423b | 2009-09-25 18:43:00 +0000 | [diff] [blame] | 7381 | return true; |
John McCall | c373d48 | 2010-01-27 01:50:18 +0000 | [diff] [blame] | 7382 | |
| 7383 | // Ignore access control bits, we don't need them for redeclaration checking. |
| 7384 | FunctionDecl *Specialization = cast<FunctionDecl>(*Result); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7385 | |
Douglas Gregor | 0a897e3 | 2009-10-15 17:21:20 +0000 | [diff] [blame] | 7386 | if (Specialization->getTemplateSpecializationKind() == TSK_Undeclared) { |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7387 | Diag(D.getIdentifierLoc(), |
Douglas Gregor | d5a423b | 2009-09-25 18:43:00 +0000 | [diff] [blame] | 7388 | diag::err_explicit_instantiation_member_function_not_instantiated) |
| 7389 | << Specialization |
| 7390 | << (Specialization->getTemplateSpecializationKind() == |
| 7391 | TSK_ExplicitSpecialization); |
| 7392 | Diag(Specialization->getLocation(), diag::note_explicit_instantiation_here); |
| 7393 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7394 | } |
| 7395 | |
Douglas Gregor | ef96ee0 | 2012-01-14 16:38:05 +0000 | [diff] [blame] | 7396 | FunctionDecl *PrevDecl = Specialization->getPreviousDecl(); |
Douglas Gregor | 583f33b | 2009-10-15 18:07:02 +0000 | [diff] [blame] | 7397 | if (!PrevDecl && Specialization->isThisDeclarationADefinition()) |
| 7398 | PrevDecl = Specialization; |
| 7399 | |
Douglas Gregor | 0a897e3 | 2009-10-15 17:21:20 +0000 | [diff] [blame] | 7400 | if (PrevDecl) { |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 7401 | bool HasNoEffect = false; |
Douglas Gregor | 0d03514 | 2009-10-27 18:42:08 +0000 | [diff] [blame] | 7402 | if (CheckSpecializationInstantiationRedecl(D.getIdentifierLoc(), TSK, |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7403 | PrevDecl, |
| 7404 | PrevDecl->getTemplateSpecializationKind(), |
Douglas Gregor | 0a897e3 | 2009-10-15 17:21:20 +0000 | [diff] [blame] | 7405 | PrevDecl->getPointOfInstantiation(), |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 7406 | HasNoEffect)) |
Douglas Gregor | 0a897e3 | 2009-10-15 17:21:20 +0000 | [diff] [blame] | 7407 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7408 | |
Douglas Gregor | 0a897e3 | 2009-10-15 17:21:20 +0000 | [diff] [blame] | 7409 | // FIXME: We may still want to build some representation of this |
| 7410 | // explicit specialization. |
Abramo Bagnara | c98971d | 2010-06-12 07:44:57 +0000 | [diff] [blame] | 7411 | if (HasNoEffect) |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7412 | return (Decl*) 0; |
Douglas Gregor | 0a897e3 | 2009-10-15 17:21:20 +0000 | [diff] [blame] | 7413 | } |
Anders Carlsson | 26d6e9d | 2009-11-24 05:34:41 +0000 | [diff] [blame] | 7414 | |
| 7415 | Specialization->setTemplateSpecializationKind(TSK, D.getIdentifierLoc()); |
Rafael Espindola | 256fc4d | 2012-01-04 05:40:59 +0000 | [diff] [blame] | 7416 | AttributeList *Attr = D.getDeclSpec().getAttributes().getList(); |
| 7417 | if (Attr) |
| 7418 | ProcessDeclAttributeList(S, Specialization, Attr); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7419 | |
Douglas Gregor | 0a897e3 | 2009-10-15 17:21:20 +0000 | [diff] [blame] | 7420 | if (TSK == TSK_ExplicitInstantiationDefinition) |
Chandler Carruth | 58e390e | 2010-08-25 08:27:02 +0000 | [diff] [blame] | 7421 | InstantiateFunctionDefinition(D.getIdentifierLoc(), Specialization); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7422 | |
Douglas Gregor | 558c032 | 2009-10-14 23:41:34 +0000 | [diff] [blame] | 7423 | // C++0x [temp.explicit]p2: |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7424 | // If the explicit instantiation is for a member function, a member class |
Douglas Gregor | 558c032 | 2009-10-14 23:41:34 +0000 | [diff] [blame] | 7425 | // or a static data member of a class template specialization, the name of |
| 7426 | // the class template specialization in the qualified-id for the member |
| 7427 | // name shall be a simple-template-id. |
| 7428 | // |
| 7429 | // C++98 has the same restriction, just worded differently. |
Douglas Gregor | 0a897e3 | 2009-10-15 17:21:20 +0000 | [diff] [blame] | 7430 | FunctionTemplateDecl *FunTmpl = Specialization->getPrimaryTemplate(); |
Douglas Gregor | 3f9a056 | 2009-11-03 01:35:08 +0000 | [diff] [blame] | 7431 | if (D.getName().getKind() != UnqualifiedId::IK_TemplateId && !FunTmpl && |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7432 | D.getCXXScopeSpec().isSet() && |
Douglas Gregor | 558c032 | 2009-10-14 23:41:34 +0000 | [diff] [blame] | 7433 | !ScopeSpecifierHasTemplateId(D.getCXXScopeSpec())) |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7434 | Diag(D.getIdentifierLoc(), |
Douglas Gregor | a2dd828 | 2010-06-16 16:26:47 +0000 | [diff] [blame] | 7435 | diag::ext_explicit_instantiation_without_qualified_id) |
Douglas Gregor | 558c032 | 2009-10-14 23:41:34 +0000 | [diff] [blame] | 7436 | << Specialization << D.getCXXScopeSpec().getRange(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7437 | |
Douglas Gregor | 558c032 | 2009-10-14 23:41:34 +0000 | [diff] [blame] | 7438 | CheckExplicitInstantiationScope(*this, |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7439 | FunTmpl? (NamedDecl *)FunTmpl |
Douglas Gregor | 558c032 | 2009-10-14 23:41:34 +0000 | [diff] [blame] | 7440 | : Specialization->getInstantiatedFromMemberFunction(), |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7441 | D.getIdentifierLoc(), |
Douglas Gregor | 558c032 | 2009-10-14 23:41:34 +0000 | [diff] [blame] | 7442 | D.getCXXScopeSpec().isSet()); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7443 | |
Douglas Gregor | d5a423b | 2009-09-25 18:43:00 +0000 | [diff] [blame] | 7444 | // FIXME: Create some kind of ExplicitInstantiationDecl here. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7445 | return (Decl*) 0; |
Douglas Gregor | d5a423b | 2009-09-25 18:43:00 +0000 | [diff] [blame] | 7446 | } |
| 7447 | |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 7448 | TypeResult |
John McCall | c4e7019 | 2009-09-11 04:59:25 +0000 | [diff] [blame] | 7449 | Sema::ActOnDependentTag(Scope *S, unsigned TagSpec, TagUseKind TUK, |
| 7450 | const CXXScopeSpec &SS, IdentifierInfo *Name, |
| 7451 | SourceLocation TagLoc, SourceLocation NameLoc) { |
| 7452 | // This has to hold, because SS is expected to be defined. |
| 7453 | assert(Name && "Expected a name in a dependent tag"); |
| 7454 | |
| 7455 | NestedNameSpecifier *NNS |
| 7456 | = static_cast<NestedNameSpecifier *>(SS.getScopeRep()); |
| 7457 | if (!NNS) |
| 7458 | return true; |
| 7459 | |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 7460 | TagTypeKind Kind = TypeWithKeyword::getTagTypeKindForTypeSpec(TagSpec); |
Daniel Dunbar | 12c0ade | 2010-04-01 16:50:48 +0000 | [diff] [blame] | 7461 | |
Douglas Gregor | 48c89f4 | 2010-04-24 16:38:41 +0000 | [diff] [blame] | 7462 | if (TUK == TUK_Declaration || TUK == TUK_Definition) { |
| 7463 | Diag(NameLoc, diag::err_dependent_tag_decl) |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 7464 | << (TUK == TUK_Definition) << Kind << SS.getRange(); |
Douglas Gregor | 48c89f4 | 2010-04-24 16:38:41 +0000 | [diff] [blame] | 7465 | return true; |
| 7466 | } |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 7467 | |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 7468 | // Create the resulting type. |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 7469 | ElaboratedTypeKeyword Kwd = TypeWithKeyword::getKeywordForTagTypeKind(Kind); |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 7470 | QualType Result = Context.getDependentNameType(Kwd, NNS, Name); |
| 7471 | |
| 7472 | // Create type-source location information for this type. |
| 7473 | TypeLocBuilder TLB; |
| 7474 | DependentNameTypeLoc TL = TLB.push<DependentNameTypeLoc>(Result); |
Abramo Bagnara | 38a4291 | 2012-02-06 19:09:27 +0000 | [diff] [blame] | 7475 | TL.setElaboratedKeywordLoc(TagLoc); |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 7476 | TL.setQualifierLoc(SS.getWithLocInContext(Context)); |
| 7477 | TL.setNameLoc(NameLoc); |
| 7478 | return CreateParsedType(Result, TLB.getTypeSourceInfo(Context, Result)); |
John McCall | c4e7019 | 2009-09-11 04:59:25 +0000 | [diff] [blame] | 7479 | } |
| 7480 | |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 7481 | TypeResult |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7482 | Sema::ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, |
| 7483 | const CXXScopeSpec &SS, const IdentifierInfo &II, |
Douglas Gregor | 1a15dae | 2010-06-16 22:31:08 +0000 | [diff] [blame] | 7484 | SourceLocation IdLoc) { |
Douglas Gregor | e29425b | 2011-02-28 22:42:13 +0000 | [diff] [blame] | 7485 | if (SS.isInvalid()) |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 7486 | return true; |
Douglas Gregor | e29425b | 2011-02-28 22:42:13 +0000 | [diff] [blame] | 7487 | |
Richard Smith | ebaf0e6 | 2011-10-18 20:49:44 +0000 | [diff] [blame] | 7488 | if (TypenameLoc.isValid() && S && !S->getTemplateParamParent()) |
| 7489 | Diag(TypenameLoc, |
Richard Smith | 80ad52f | 2013-01-02 11:42:31 +0000 | [diff] [blame] | 7490 | getLangOpts().CPlusPlus11 ? |
Richard Smith | ebaf0e6 | 2011-10-18 20:49:44 +0000 | [diff] [blame] | 7491 | diag::warn_cxx98_compat_typename_outside_of_template : |
| 7492 | diag::ext_typename_outside_of_template) |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7493 | << FixItHint::CreateRemoval(TypenameLoc); |
| 7494 | |
Douglas Gregor | 2494dd0 | 2011-03-01 01:34:45 +0000 | [diff] [blame] | 7495 | NestedNameSpecifierLoc QualifierLoc = SS.getWithLocInContext(Context); |
Douglas Gregor | 9e87687 | 2011-03-01 18:12:44 +0000 | [diff] [blame] | 7496 | QualType T = CheckTypenameType(TypenameLoc.isValid()? ETK_Typename : ETK_None, |
| 7497 | TypenameLoc, QualifierLoc, II, IdLoc); |
Douglas Gregor | 31a19b6 | 2009-04-01 21:51:26 +0000 | [diff] [blame] | 7498 | if (T.isNull()) |
| 7499 | return true; |
John McCall | 63b4385 | 2010-04-29 23:50:39 +0000 | [diff] [blame] | 7500 | |
| 7501 | TypeSourceInfo *TSI = Context.CreateTypeSourceInfo(T); |
| 7502 | if (isa<DependentNameType>(T)) { |
David Blaikie | 39e6ab4 | 2013-02-18 22:06:02 +0000 | [diff] [blame] | 7503 | DependentNameTypeLoc TL = TSI->getTypeLoc().castAs<DependentNameTypeLoc>(); |
Abramo Bagnara | 38a4291 | 2012-02-06 19:09:27 +0000 | [diff] [blame] | 7504 | TL.setElaboratedKeywordLoc(TypenameLoc); |
Douglas Gregor | 2494dd0 | 2011-03-01 01:34:45 +0000 | [diff] [blame] | 7505 | TL.setQualifierLoc(QualifierLoc); |
John McCall | 4e44983 | 2010-05-28 23:32:21 +0000 | [diff] [blame] | 7506 | TL.setNameLoc(IdLoc); |
John McCall | 63b4385 | 2010-04-29 23:50:39 +0000 | [diff] [blame] | 7507 | } else { |
David Blaikie | 39e6ab4 | 2013-02-18 22:06:02 +0000 | [diff] [blame] | 7508 | ElaboratedTypeLoc TL = TSI->getTypeLoc().castAs<ElaboratedTypeLoc>(); |
Abramo Bagnara | 38a4291 | 2012-02-06 19:09:27 +0000 | [diff] [blame] | 7509 | TL.setElaboratedKeywordLoc(TypenameLoc); |
Douglas Gregor | 9e87687 | 2011-03-01 18:12:44 +0000 | [diff] [blame] | 7510 | TL.setQualifierLoc(QualifierLoc); |
David Blaikie | 39e6ab4 | 2013-02-18 22:06:02 +0000 | [diff] [blame] | 7511 | TL.getNamedTypeLoc().castAs<TypeSpecTypeLoc>().setNameLoc(IdLoc); |
John McCall | 63b4385 | 2010-04-29 23:50:39 +0000 | [diff] [blame] | 7512 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7513 | |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 7514 | return CreateParsedType(T, TSI); |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 7515 | } |
| 7516 | |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 7517 | TypeResult |
Abramo Bagnara | 55d23c9 | 2012-02-06 14:41:24 +0000 | [diff] [blame] | 7518 | Sema::ActOnTypenameType(Scope *S, |
| 7519 | SourceLocation TypenameLoc, |
| 7520 | const CXXScopeSpec &SS, |
| 7521 | SourceLocation TemplateKWLoc, |
Douglas Gregor | a02411e | 2011-02-27 22:46:49 +0000 | [diff] [blame] | 7522 | TemplateTy TemplateIn, |
| 7523 | SourceLocation TemplateNameLoc, |
| 7524 | SourceLocation LAngleLoc, |
| 7525 | ASTTemplateArgsPtr TemplateArgsIn, |
| 7526 | SourceLocation RAngleLoc) { |
Richard Smith | ebaf0e6 | 2011-10-18 20:49:44 +0000 | [diff] [blame] | 7527 | if (TypenameLoc.isValid() && S && !S->getTemplateParamParent()) |
| 7528 | Diag(TypenameLoc, |
Richard Smith | 80ad52f | 2013-01-02 11:42:31 +0000 | [diff] [blame] | 7529 | getLangOpts().CPlusPlus11 ? |
Richard Smith | ebaf0e6 | 2011-10-18 20:49:44 +0000 | [diff] [blame] | 7530 | diag::warn_cxx98_compat_typename_outside_of_template : |
| 7531 | diag::ext_typename_outside_of_template) |
| 7532 | << FixItHint::CreateRemoval(TypenameLoc); |
Douglas Gregor | a02411e | 2011-02-27 22:46:49 +0000 | [diff] [blame] | 7533 | |
| 7534 | // Translate the parser's template argument list in our AST format. |
| 7535 | TemplateArgumentListInfo TemplateArgs(LAngleLoc, RAngleLoc); |
| 7536 | translateTemplateArguments(TemplateArgsIn, TemplateArgs); |
| 7537 | |
| 7538 | TemplateName Template = TemplateIn.get(); |
Douglas Gregor | ef24c4b | 2011-03-01 16:44:30 +0000 | [diff] [blame] | 7539 | if (DependentTemplateName *DTN = Template.getAsDependentTemplateName()) { |
| 7540 | // Construct a dependent template specialization type. |
| 7541 | assert(DTN && "dependent template has non-dependent name?"); |
| 7542 | assert(DTN->getQualifier() |
| 7543 | == static_cast<NestedNameSpecifier*>(SS.getScopeRep())); |
| 7544 | QualType T = Context.getDependentTemplateSpecializationType(ETK_Typename, |
| 7545 | DTN->getQualifier(), |
| 7546 | DTN->getIdentifier(), |
| 7547 | TemplateArgs); |
Douglas Gregor | a02411e | 2011-02-27 22:46:49 +0000 | [diff] [blame] | 7548 | |
Douglas Gregor | ef24c4b | 2011-03-01 16:44:30 +0000 | [diff] [blame] | 7549 | // Create source-location information for this type. |
John McCall | 4e44983 | 2010-05-28 23:32:21 +0000 | [diff] [blame] | 7550 | TypeLocBuilder Builder; |
Douglas Gregor | ef24c4b | 2011-03-01 16:44:30 +0000 | [diff] [blame] | 7551 | DependentTemplateSpecializationTypeLoc SpecTL |
| 7552 | = Builder.push<DependentTemplateSpecializationTypeLoc>(T); |
Abramo Bagnara | 55d23c9 | 2012-02-06 14:41:24 +0000 | [diff] [blame] | 7553 | SpecTL.setElaboratedKeywordLoc(TypenameLoc); |
| 7554 | SpecTL.setQualifierLoc(SS.getWithLocInContext(Context)); |
Abramo Bagnara | 66581d4 | 2012-02-06 22:45:07 +0000 | [diff] [blame] | 7555 | SpecTL.setTemplateKeywordLoc(TemplateKWLoc); |
Abramo Bagnara | 55d23c9 | 2012-02-06 14:41:24 +0000 | [diff] [blame] | 7556 | SpecTL.setTemplateNameLoc(TemplateNameLoc); |
Douglas Gregor | a02411e | 2011-02-27 22:46:49 +0000 | [diff] [blame] | 7557 | SpecTL.setLAngleLoc(LAngleLoc); |
| 7558 | SpecTL.setRAngleLoc(RAngleLoc); |
Douglas Gregor | a02411e | 2011-02-27 22:46:49 +0000 | [diff] [blame] | 7559 | for (unsigned I = 0, N = TemplateArgs.size(); I != N; ++I) |
| 7560 | SpecTL.setArgLocInfo(I, TemplateArgs[I].getLocInfo()); |
Douglas Gregor | ef24c4b | 2011-03-01 16:44:30 +0000 | [diff] [blame] | 7561 | return CreateParsedType(T, Builder.getTypeSourceInfo(Context, T)); |
Douglas Gregor | 6946baf | 2009-09-02 13:05:45 +0000 | [diff] [blame] | 7562 | } |
Douglas Gregor | a02411e | 2011-02-27 22:46:49 +0000 | [diff] [blame] | 7563 | |
Douglas Gregor | ef24c4b | 2011-03-01 16:44:30 +0000 | [diff] [blame] | 7564 | QualType T = CheckTemplateIdType(Template, TemplateNameLoc, TemplateArgs); |
| 7565 | if (T.isNull()) |
| 7566 | return true; |
Douglas Gregor | a02411e | 2011-02-27 22:46:49 +0000 | [diff] [blame] | 7567 | |
Abramo Bagnara | 55d23c9 | 2012-02-06 14:41:24 +0000 | [diff] [blame] | 7568 | // Provide source-location information for the template specialization type. |
Douglas Gregor | a02411e | 2011-02-27 22:46:49 +0000 | [diff] [blame] | 7569 | TypeLocBuilder Builder; |
Abramo Bagnara | 55d23c9 | 2012-02-06 14:41:24 +0000 | [diff] [blame] | 7570 | TemplateSpecializationTypeLoc SpecTL |
Douglas Gregor | ef24c4b | 2011-03-01 16:44:30 +0000 | [diff] [blame] | 7571 | = Builder.push<TemplateSpecializationTypeLoc>(T); |
Abramo Bagnara | 55d23c9 | 2012-02-06 14:41:24 +0000 | [diff] [blame] | 7572 | SpecTL.setTemplateKeywordLoc(TemplateKWLoc); |
| 7573 | SpecTL.setTemplateNameLoc(TemplateNameLoc); |
Douglas Gregor | a02411e | 2011-02-27 22:46:49 +0000 | [diff] [blame] | 7574 | SpecTL.setLAngleLoc(LAngleLoc); |
| 7575 | SpecTL.setRAngleLoc(RAngleLoc); |
Douglas Gregor | a02411e | 2011-02-27 22:46:49 +0000 | [diff] [blame] | 7576 | for (unsigned I = 0, N = TemplateArgs.size(); I != N; ++I) |
| 7577 | SpecTL.setArgLocInfo(I, TemplateArgs[I].getLocInfo()); |
| 7578 | |
Douglas Gregor | ef24c4b | 2011-03-01 16:44:30 +0000 | [diff] [blame] | 7579 | T = Context.getElaboratedType(ETK_Typename, SS.getScopeRep(), T); |
| 7580 | ElaboratedTypeLoc TL = Builder.push<ElaboratedTypeLoc>(T); |
Abramo Bagnara | 38a4291 | 2012-02-06 19:09:27 +0000 | [diff] [blame] | 7581 | TL.setElaboratedKeywordLoc(TypenameLoc); |
Douglas Gregor | 9e87687 | 2011-03-01 18:12:44 +0000 | [diff] [blame] | 7582 | TL.setQualifierLoc(SS.getWithLocInContext(Context)); |
| 7583 | |
Douglas Gregor | ef24c4b | 2011-03-01 16:44:30 +0000 | [diff] [blame] | 7584 | TypeSourceInfo *TSI = Builder.getTypeSourceInfo(Context, T); |
| 7585 | return CreateParsedType(T, TSI); |
Douglas Gregor | 1734317 | 2009-04-01 00:28:59 +0000 | [diff] [blame] | 7586 | } |
| 7587 | |
Douglas Gregor | a02411e | 2011-02-27 22:46:49 +0000 | [diff] [blame] | 7588 | |
Richard Smith | 4493c0a | 2012-05-09 05:17:00 +0000 | [diff] [blame] | 7589 | /// Determine whether this failed name lookup should be treated as being |
| 7590 | /// disabled by a usage of std::enable_if. |
| 7591 | static bool isEnableIf(NestedNameSpecifierLoc NNS, const IdentifierInfo &II, |
| 7592 | SourceRange &CondRange) { |
| 7593 | // We must be looking for a ::type... |
| 7594 | if (!II.isStr("type")) |
| 7595 | return false; |
| 7596 | |
| 7597 | // ... within an explicitly-written template specialization... |
| 7598 | if (!NNS || !NNS.getNestedNameSpecifier()->getAsType()) |
| 7599 | return false; |
| 7600 | TypeLoc EnableIfTy = NNS.getTypeLoc(); |
David Blaikie | 39e6ab4 | 2013-02-18 22:06:02 +0000 | [diff] [blame] | 7601 | TemplateSpecializationTypeLoc EnableIfTSTLoc = |
| 7602 | EnableIfTy.getAs<TemplateSpecializationTypeLoc>(); |
| 7603 | if (!EnableIfTSTLoc || EnableIfTSTLoc.getNumArgs() == 0) |
Richard Smith | 4493c0a | 2012-05-09 05:17:00 +0000 | [diff] [blame] | 7604 | return false; |
| 7605 | const TemplateSpecializationType *EnableIfTST = |
David Blaikie | 39e6ab4 | 2013-02-18 22:06:02 +0000 | [diff] [blame] | 7606 | cast<TemplateSpecializationType>(EnableIfTSTLoc.getTypePtr()); |
Richard Smith | 4493c0a | 2012-05-09 05:17:00 +0000 | [diff] [blame] | 7607 | |
| 7608 | // ... which names a complete class template declaration... |
| 7609 | const TemplateDecl *EnableIfDecl = |
| 7610 | EnableIfTST->getTemplateName().getAsTemplateDecl(); |
| 7611 | if (!EnableIfDecl || EnableIfTST->isIncompleteType()) |
| 7612 | return false; |
| 7613 | |
| 7614 | // ... called "enable_if". |
| 7615 | const IdentifierInfo *EnableIfII = |
| 7616 | EnableIfDecl->getDeclName().getAsIdentifierInfo(); |
| 7617 | if (!EnableIfII || !EnableIfII->isStr("enable_if")) |
| 7618 | return false; |
| 7619 | |
| 7620 | // Assume the first template argument is the condition. |
David Blaikie | 39e6ab4 | 2013-02-18 22:06:02 +0000 | [diff] [blame] | 7621 | CondRange = EnableIfTSTLoc.getArgLoc(0).getSourceRange(); |
Richard Smith | 4493c0a | 2012-05-09 05:17:00 +0000 | [diff] [blame] | 7622 | return true; |
| 7623 | } |
| 7624 | |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 7625 | /// \brief Build the type that describes a C++ typename specifier, |
| 7626 | /// e.g., "typename T::type". |
| 7627 | QualType |
Douglas Gregor | e29425b | 2011-02-28 22:42:13 +0000 | [diff] [blame] | 7628 | Sema::CheckTypenameType(ElaboratedTypeKeyword Keyword, |
| 7629 | SourceLocation KeywordLoc, |
| 7630 | NestedNameSpecifierLoc QualifierLoc, |
| 7631 | const IdentifierInfo &II, |
Abramo Bagnara | e4da7a0 | 2010-05-19 21:37:53 +0000 | [diff] [blame] | 7632 | SourceLocation IILoc) { |
John McCall | 77bb1aa | 2010-05-01 00:40:08 +0000 | [diff] [blame] | 7633 | CXXScopeSpec SS; |
Douglas Gregor | e29425b | 2011-02-28 22:42:13 +0000 | [diff] [blame] | 7634 | SS.Adopt(QualifierLoc); |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 7635 | |
John McCall | 77bb1aa | 2010-05-01 00:40:08 +0000 | [diff] [blame] | 7636 | DeclContext *Ctx = computeDeclContext(SS); |
| 7637 | if (!Ctx) { |
| 7638 | // If the nested-name-specifier is dependent and couldn't be |
| 7639 | // resolved to a type, build a typename type. |
Douglas Gregor | e29425b | 2011-02-28 22:42:13 +0000 | [diff] [blame] | 7640 | assert(QualifierLoc.getNestedNameSpecifier()->isDependent()); |
| 7641 | return Context.getDependentNameType(Keyword, |
| 7642 | QualifierLoc.getNestedNameSpecifier(), |
| 7643 | &II); |
Douglas Gregor | 42af25f | 2009-05-11 19:58:34 +0000 | [diff] [blame] | 7644 | } |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 7645 | |
John McCall | 77bb1aa | 2010-05-01 00:40:08 +0000 | [diff] [blame] | 7646 | // If the nested-name-specifier refers to the current instantiation, |
| 7647 | // the "typename" keyword itself is superfluous. In C++03, the |
| 7648 | // program is actually ill-formed. However, DR 382 (in C++0x CD1) |
| 7649 | // allows such extraneous "typename" keywords, and we retroactively |
Douglas Gregor | 732281d | 2010-06-14 22:07:54 +0000 | [diff] [blame] | 7650 | // apply this DR to C++03 code with only a warning. In any case we continue. |
Douglas Gregor | 42af25f | 2009-05-11 19:58:34 +0000 | [diff] [blame] | 7651 | |
John McCall | 77bb1aa | 2010-05-01 00:40:08 +0000 | [diff] [blame] | 7652 | if (RequireCompleteDeclContext(SS, Ctx)) |
| 7653 | return QualType(); |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 7654 | |
| 7655 | DeclarationName Name(&II); |
Abramo Bagnara | e4da7a0 | 2010-05-19 21:37:53 +0000 | [diff] [blame] | 7656 | LookupResult Result(*this, Name, IILoc, LookupOrdinaryName); |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 7657 | LookupQualifiedName(Result, Ctx); |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 7658 | unsigned DiagID = 0; |
| 7659 | Decl *Referenced = 0; |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 7660 | switch (Result.getResultKind()) { |
Richard Smith | 4493c0a | 2012-05-09 05:17:00 +0000 | [diff] [blame] | 7661 | case LookupResult::NotFound: { |
| 7662 | // If we're looking up 'type' within a template named 'enable_if', produce |
| 7663 | // a more specific diagnostic. |
| 7664 | SourceRange CondRange; |
| 7665 | if (isEnableIf(QualifierLoc, II, CondRange)) { |
| 7666 | Diag(CondRange.getBegin(), diag::err_typename_nested_not_found_enable_if) |
| 7667 | << Ctx << CondRange; |
| 7668 | return QualType(); |
| 7669 | } |
| 7670 | |
Douglas Gregor | 3f09327 | 2009-10-13 21:16:44 +0000 | [diff] [blame] | 7671 | DiagID = diag::err_typename_nested_not_found; |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 7672 | break; |
Richard Smith | 4493c0a | 2012-05-09 05:17:00 +0000 | [diff] [blame] | 7673 | } |
Douglas Gregor | d954504 | 2010-12-09 00:06:27 +0000 | [diff] [blame] | 7674 | |
| 7675 | case LookupResult::FoundUnresolvedValue: { |
| 7676 | // We found a using declaration that is a value. Most likely, the using |
| 7677 | // declaration itself is meant to have the 'typename' keyword. |
Douglas Gregor | e29425b | 2011-02-28 22:42:13 +0000 | [diff] [blame] | 7678 | SourceRange FullRange(KeywordLoc.isValid() ? KeywordLoc : SS.getBeginLoc(), |
Douglas Gregor | d954504 | 2010-12-09 00:06:27 +0000 | [diff] [blame] | 7679 | IILoc); |
| 7680 | Diag(IILoc, diag::err_typename_refers_to_using_value_decl) |
| 7681 | << Name << Ctx << FullRange; |
| 7682 | if (UnresolvedUsingValueDecl *Using |
| 7683 | = dyn_cast<UnresolvedUsingValueDecl>(Result.getRepresentativeDecl())){ |
Douglas Gregor | dc35571 | 2011-02-25 00:36:19 +0000 | [diff] [blame] | 7684 | SourceLocation Loc = Using->getQualifierLoc().getBeginLoc(); |
Douglas Gregor | d954504 | 2010-12-09 00:06:27 +0000 | [diff] [blame] | 7685 | Diag(Loc, diag::note_using_value_decl_missing_typename) |
| 7686 | << FixItHint::CreateInsertion(Loc, "typename "); |
| 7687 | } |
| 7688 | } |
| 7689 | // Fall through to create a dependent typename type, from which we can recover |
| 7690 | // better. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7691 | |
Douglas Gregor | 7d3f576 | 2010-01-15 01:44:47 +0000 | [diff] [blame] | 7692 | case LookupResult::NotFoundInCurrentInstantiation: |
| 7693 | // Okay, it's a member of an unknown instantiation. |
Douglas Gregor | e29425b | 2011-02-28 22:42:13 +0000 | [diff] [blame] | 7694 | return Context.getDependentNameType(Keyword, |
| 7695 | QualifierLoc.getNestedNameSpecifier(), |
| 7696 | &II); |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 7697 | |
| 7698 | case LookupResult::Found: |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7699 | if (TypeDecl *Type = dyn_cast<TypeDecl>(Result.getFoundDecl())) { |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 7700 | // We found a type. Build an ElaboratedType, since the |
| 7701 | // typename-specifier was just sugar. |
Douglas Gregor | e29425b | 2011-02-28 22:42:13 +0000 | [diff] [blame] | 7702 | return Context.getElaboratedType(ETK_Typename, |
| 7703 | QualifierLoc.getNestedNameSpecifier(), |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 7704 | Context.getTypeDeclType(Type)); |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 7705 | } |
| 7706 | |
| 7707 | DiagID = diag::err_typename_nested_not_type; |
John McCall | f36e02d | 2009-10-09 21:13:30 +0000 | [diff] [blame] | 7708 | Referenced = Result.getFoundDecl(); |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 7709 | break; |
| 7710 | |
| 7711 | case LookupResult::FoundOverloaded: |
| 7712 | DiagID = diag::err_typename_nested_not_type; |
| 7713 | Referenced = *Result.begin(); |
| 7714 | break; |
| 7715 | |
John McCall | 6e24726 | 2009-10-10 05:48:19 +0000 | [diff] [blame] | 7716 | case LookupResult::Ambiguous: |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 7717 | return QualType(); |
| 7718 | } |
| 7719 | |
| 7720 | // If we get here, it's because name lookup did not find a |
| 7721 | // type. Emit an appropriate diagnostic and return an error. |
Douglas Gregor | e29425b | 2011-02-28 22:42:13 +0000 | [diff] [blame] | 7722 | SourceRange FullRange(KeywordLoc.isValid() ? KeywordLoc : SS.getBeginLoc(), |
Abramo Bagnara | e4da7a0 | 2010-05-19 21:37:53 +0000 | [diff] [blame] | 7723 | IILoc); |
| 7724 | Diag(IILoc, DiagID) << FullRange << Name << Ctx; |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 7725 | if (Referenced) |
| 7726 | Diag(Referenced->getLocation(), diag::note_typename_refers_here) |
| 7727 | << Name; |
| 7728 | return QualType(); |
| 7729 | } |
Douglas Gregor | 4a959d8 | 2009-08-06 16:20:37 +0000 | [diff] [blame] | 7730 | |
| 7731 | namespace { |
| 7732 | // See Sema::RebuildTypeInCurrentInstantiation |
Benjamin Kramer | 85b4521 | 2009-11-28 19:45:26 +0000 | [diff] [blame] | 7733 | class CurrentInstantiationRebuilder |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7734 | : public TreeTransform<CurrentInstantiationRebuilder> { |
Douglas Gregor | 4a959d8 | 2009-08-06 16:20:37 +0000 | [diff] [blame] | 7735 | SourceLocation Loc; |
| 7736 | DeclarationName Entity; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7737 | |
Douglas Gregor | 4a959d8 | 2009-08-06 16:20:37 +0000 | [diff] [blame] | 7738 | public: |
Douglas Gregor | 895162d | 2010-04-30 18:55:50 +0000 | [diff] [blame] | 7739 | typedef TreeTransform<CurrentInstantiationRebuilder> inherited; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7740 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7741 | CurrentInstantiationRebuilder(Sema &SemaRef, |
Douglas Gregor | 4a959d8 | 2009-08-06 16:20:37 +0000 | [diff] [blame] | 7742 | SourceLocation Loc, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7743 | DeclarationName Entity) |
| 7744 | : TreeTransform<CurrentInstantiationRebuilder>(SemaRef), |
Douglas Gregor | 4a959d8 | 2009-08-06 16:20:37 +0000 | [diff] [blame] | 7745 | Loc(Loc), Entity(Entity) { } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7746 | |
| 7747 | /// \brief Determine whether the given type \p T has already been |
Douglas Gregor | 4a959d8 | 2009-08-06 16:20:37 +0000 | [diff] [blame] | 7748 | /// transformed. |
| 7749 | /// |
| 7750 | /// For the purposes of type reconstruction, a type has already been |
| 7751 | /// transformed if it is NULL or if it is not dependent. |
| 7752 | bool AlreadyTransformed(QualType T) { |
| 7753 | return T.isNull() || !T->isDependentType(); |
| 7754 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7755 | |
| 7756 | /// \brief Returns the location of the entity whose type is being |
Douglas Gregor | 4a959d8 | 2009-08-06 16:20:37 +0000 | [diff] [blame] | 7757 | /// rebuilt. |
| 7758 | SourceLocation getBaseLocation() { return Loc; } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7759 | |
Douglas Gregor | 4a959d8 | 2009-08-06 16:20:37 +0000 | [diff] [blame] | 7760 | /// \brief Returns the name of the entity whose type is being rebuilt. |
| 7761 | DeclarationName getBaseEntity() { return Entity; } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7762 | |
Douglas Gregor | 972e6ce | 2009-10-27 06:26:26 +0000 | [diff] [blame] | 7763 | /// \brief Sets the "base" location and entity when that |
| 7764 | /// information is known based on another transformation. |
| 7765 | void setBase(SourceLocation Loc, DeclarationName Entity) { |
| 7766 | this->Loc = Loc; |
| 7767 | this->Entity = Entity; |
| 7768 | } |
Douglas Gregor | dfca6f5 | 2012-02-13 22:00:16 +0000 | [diff] [blame] | 7769 | |
| 7770 | ExprResult TransformLambdaExpr(LambdaExpr *E) { |
| 7771 | // Lambdas never need to be transformed. |
| 7772 | return E; |
| 7773 | } |
Douglas Gregor | 4a959d8 | 2009-08-06 16:20:37 +0000 | [diff] [blame] | 7774 | }; |
| 7775 | } |
| 7776 | |
Douglas Gregor | 4a959d8 | 2009-08-06 16:20:37 +0000 | [diff] [blame] | 7777 | /// \brief Rebuilds a type within the context of the current instantiation. |
| 7778 | /// |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7779 | /// The type \p T is part of the type of an out-of-line member definition of |
Douglas Gregor | 4a959d8 | 2009-08-06 16:20:37 +0000 | [diff] [blame] | 7780 | /// a class template (or class template partial specialization) that was parsed |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7781 | /// and constructed before we entered the scope of the class template (or |
Douglas Gregor | 4a959d8 | 2009-08-06 16:20:37 +0000 | [diff] [blame] | 7782 | /// partial specialization thereof). This routine will rebuild that type now |
| 7783 | /// that we have entered the declarator's scope, which may produce different |
| 7784 | /// canonical types, e.g., |
| 7785 | /// |
| 7786 | /// \code |
| 7787 | /// template<typename T> |
| 7788 | /// struct X { |
| 7789 | /// typedef T* pointer; |
| 7790 | /// pointer data(); |
| 7791 | /// }; |
| 7792 | /// |
| 7793 | /// template<typename T> |
| 7794 | /// typename X<T>::pointer X<T>::data() { ... } |
| 7795 | /// \endcode |
| 7796 | /// |
Douglas Gregor | 4714c12 | 2010-03-31 17:34:00 +0000 | [diff] [blame] | 7797 | /// Here, the type "typename X<T>::pointer" will be created as a DependentNameType, |
Douglas Gregor | 4a959d8 | 2009-08-06 16:20:37 +0000 | [diff] [blame] | 7798 | /// since we do not know that we can look into X<T> when we parsed the type. |
| 7799 | /// This function will rebuild the type, performing the lookup of "pointer" |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 7800 | /// in X<T> and returning an ElaboratedType whose canonical type is the same |
Douglas Gregor | 4a959d8 | 2009-08-06 16:20:37 +0000 | [diff] [blame] | 7801 | /// as the canonical type of T*, allowing the return types of the out-of-line |
| 7802 | /// definition and the declaration to match. |
John McCall | 63b4385 | 2010-04-29 23:50:39 +0000 | [diff] [blame] | 7803 | TypeSourceInfo *Sema::RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, |
| 7804 | SourceLocation Loc, |
| 7805 | DeclarationName Name) { |
| 7806 | if (!T || !T->getType()->isDependentType()) |
Douglas Gregor | 4a959d8 | 2009-08-06 16:20:37 +0000 | [diff] [blame] | 7807 | return T; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7808 | |
Douglas Gregor | 4a959d8 | 2009-08-06 16:20:37 +0000 | [diff] [blame] | 7809 | CurrentInstantiationRebuilder Rebuilder(*this, Loc, Name); |
| 7810 | return Rebuilder.TransformType(T); |
Benjamin Kramer | 27ba2f0 | 2009-08-11 22:33:06 +0000 | [diff] [blame] | 7811 | } |
Douglas Gregor | bf4ea56 | 2009-09-15 16:23:51 +0000 | [diff] [blame] | 7812 | |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 7813 | ExprResult Sema::RebuildExprInCurrentInstantiation(Expr *E) { |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 7814 | CurrentInstantiationRebuilder Rebuilder(*this, E->getExprLoc(), |
| 7815 | DeclarationName()); |
| 7816 | return Rebuilder.TransformExpr(E); |
| 7817 | } |
| 7818 | |
John McCall | 63b4385 | 2010-04-29 23:50:39 +0000 | [diff] [blame] | 7819 | bool Sema::RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS) { |
Douglas Gregor | 7e38494 | 2011-02-25 16:07:42 +0000 | [diff] [blame] | 7820 | if (SS.isInvalid()) |
| 7821 | return true; |
John McCall | 31f17ec | 2010-04-27 00:57:59 +0000 | [diff] [blame] | 7822 | |
Douglas Gregor | 7e38494 | 2011-02-25 16:07:42 +0000 | [diff] [blame] | 7823 | NestedNameSpecifierLoc QualifierLoc = SS.getWithLocInContext(Context); |
John McCall | 31f17ec | 2010-04-27 00:57:59 +0000 | [diff] [blame] | 7824 | CurrentInstantiationRebuilder Rebuilder(*this, SS.getRange().getBegin(), |
| 7825 | DeclarationName()); |
Douglas Gregor | 7e38494 | 2011-02-25 16:07:42 +0000 | [diff] [blame] | 7826 | NestedNameSpecifierLoc Rebuilt |
| 7827 | = Rebuilder.TransformNestedNameSpecifierLoc(QualifierLoc); |
| 7828 | if (!Rebuilt) |
| 7829 | return true; |
John McCall | 63b4385 | 2010-04-29 23:50:39 +0000 | [diff] [blame] | 7830 | |
Douglas Gregor | 7e38494 | 2011-02-25 16:07:42 +0000 | [diff] [blame] | 7831 | SS.Adopt(Rebuilt); |
John McCall | 63b4385 | 2010-04-29 23:50:39 +0000 | [diff] [blame] | 7832 | return false; |
John McCall | 31f17ec | 2010-04-27 00:57:59 +0000 | [diff] [blame] | 7833 | } |
| 7834 | |
Douglas Gregor | 2060650 | 2011-10-14 15:31:12 +0000 | [diff] [blame] | 7835 | /// \brief Rebuild the template parameters now that we know we're in a current |
| 7836 | /// instantiation. |
| 7837 | bool Sema::RebuildTemplateParamsInCurrentInstantiation( |
| 7838 | TemplateParameterList *Params) { |
| 7839 | for (unsigned I = 0, N = Params->size(); I != N; ++I) { |
| 7840 | Decl *Param = Params->getParam(I); |
| 7841 | |
| 7842 | // There is nothing to rebuild in a type parameter. |
| 7843 | if (isa<TemplateTypeParmDecl>(Param)) |
| 7844 | continue; |
| 7845 | |
| 7846 | // Rebuild the template parameter list of a template template parameter. |
| 7847 | if (TemplateTemplateParmDecl *TTP |
| 7848 | = dyn_cast<TemplateTemplateParmDecl>(Param)) { |
| 7849 | if (RebuildTemplateParamsInCurrentInstantiation( |
| 7850 | TTP->getTemplateParameters())) |
| 7851 | return true; |
| 7852 | |
| 7853 | continue; |
| 7854 | } |
| 7855 | |
| 7856 | // Rebuild the type of a non-type template parameter. |
| 7857 | NonTypeTemplateParmDecl *NTTP = cast<NonTypeTemplateParmDecl>(Param); |
| 7858 | TypeSourceInfo *NewTSI |
| 7859 | = RebuildTypeInCurrentInstantiation(NTTP->getTypeSourceInfo(), |
| 7860 | NTTP->getLocation(), |
| 7861 | NTTP->getDeclName()); |
| 7862 | if (!NewTSI) |
| 7863 | return true; |
| 7864 | |
| 7865 | if (NewTSI != NTTP->getTypeSourceInfo()) { |
| 7866 | NTTP->setTypeSourceInfo(NewTSI); |
| 7867 | NTTP->setType(NewTSI->getType()); |
| 7868 | } |
| 7869 | } |
| 7870 | |
| 7871 | return false; |
| 7872 | } |
| 7873 | |
Douglas Gregor | bf4ea56 | 2009-09-15 16:23:51 +0000 | [diff] [blame] | 7874 | /// \brief Produces a formatted string that describes the binding of |
| 7875 | /// template parameters to template arguments. |
| 7876 | std::string |
| 7877 | Sema::getTemplateArgumentBindingsText(const TemplateParameterList *Params, |
| 7878 | const TemplateArgumentList &Args) { |
Douglas Gregor | 910f800 | 2010-11-07 23:05:16 +0000 | [diff] [blame] | 7879 | return getTemplateArgumentBindingsText(Params, Args.data(), Args.size()); |
Douglas Gregor | 9148c3f | 2009-11-11 19:13:48 +0000 | [diff] [blame] | 7880 | } |
| 7881 | |
| 7882 | std::string |
| 7883 | Sema::getTemplateArgumentBindingsText(const TemplateParameterList *Params, |
| 7884 | const TemplateArgument *Args, |
| 7885 | unsigned NumArgs) { |
Dylan Noblesmith | f7ccbad | 2012-02-05 02:13:05 +0000 | [diff] [blame] | 7886 | SmallString<128> Str; |
Douglas Gregor | 87dd697 | 2010-12-20 16:52:59 +0000 | [diff] [blame] | 7887 | llvm::raw_svector_ostream Out(Str); |
Douglas Gregor | bf4ea56 | 2009-09-15 16:23:51 +0000 | [diff] [blame] | 7888 | |
Douglas Gregor | 9148c3f | 2009-11-11 19:13:48 +0000 | [diff] [blame] | 7889 | if (!Params || Params->size() == 0 || NumArgs == 0) |
Douglas Gregor | 87dd697 | 2010-12-20 16:52:59 +0000 | [diff] [blame] | 7890 | return std::string(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7891 | |
Douglas Gregor | bf4ea56 | 2009-09-15 16:23:51 +0000 | [diff] [blame] | 7892 | for (unsigned I = 0, N = Params->size(); I != N; ++I) { |
Douglas Gregor | 9148c3f | 2009-11-11 19:13:48 +0000 | [diff] [blame] | 7893 | if (I >= NumArgs) |
| 7894 | break; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7895 | |
Douglas Gregor | bf4ea56 | 2009-09-15 16:23:51 +0000 | [diff] [blame] | 7896 | if (I == 0) |
Douglas Gregor | 87dd697 | 2010-12-20 16:52:59 +0000 | [diff] [blame] | 7897 | Out << "[with "; |
Douglas Gregor | bf4ea56 | 2009-09-15 16:23:51 +0000 | [diff] [blame] | 7898 | else |
Douglas Gregor | 87dd697 | 2010-12-20 16:52:59 +0000 | [diff] [blame] | 7899 | Out << ", "; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7900 | |
Douglas Gregor | bf4ea56 | 2009-09-15 16:23:51 +0000 | [diff] [blame] | 7901 | if (const IdentifierInfo *Id = Params->getParam(I)->getIdentifier()) { |
Douglas Gregor | 87dd697 | 2010-12-20 16:52:59 +0000 | [diff] [blame] | 7902 | Out << Id->getName(); |
Douglas Gregor | bf4ea56 | 2009-09-15 16:23:51 +0000 | [diff] [blame] | 7903 | } else { |
Douglas Gregor | 87dd697 | 2010-12-20 16:52:59 +0000 | [diff] [blame] | 7904 | Out << '$' << I; |
Douglas Gregor | bf4ea56 | 2009-09-15 16:23:51 +0000 | [diff] [blame] | 7905 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 7906 | |
Douglas Gregor | 87dd697 | 2010-12-20 16:52:59 +0000 | [diff] [blame] | 7907 | Out << " = "; |
Douglas Gregor | 8987b23 | 2011-09-27 23:30:47 +0000 | [diff] [blame] | 7908 | Args[I].print(getPrintingPolicy(), Out); |
Douglas Gregor | bf4ea56 | 2009-09-15 16:23:51 +0000 | [diff] [blame] | 7909 | } |
Douglas Gregor | 87dd697 | 2010-12-20 16:52:59 +0000 | [diff] [blame] | 7910 | |
| 7911 | Out << ']'; |
| 7912 | return Out.str(); |
Douglas Gregor | bf4ea56 | 2009-09-15 16:23:51 +0000 | [diff] [blame] | 7913 | } |
Francois Pichet | 8387e2a | 2011-04-22 22:18:13 +0000 | [diff] [blame] | 7914 | |
Richard Smith | ac32d90 | 2013-08-07 21:41:30 +0000 | [diff] [blame] | 7915 | void Sema::MarkAsLateParsedTemplate(FunctionDecl *FD, Decl *FnD, |
| 7916 | CachedTokens &Toks) { |
Francois Pichet | 8387e2a | 2011-04-22 22:18:13 +0000 | [diff] [blame] | 7917 | if (!FD) |
| 7918 | return; |
Richard Smith | ac32d90 | 2013-08-07 21:41:30 +0000 | [diff] [blame] | 7919 | |
| 7920 | LateParsedTemplate *LPT = new LateParsedTemplate; |
| 7921 | |
| 7922 | // Take tokens to avoid allocations |
| 7923 | LPT->Toks.swap(Toks); |
| 7924 | LPT->D = FnD; |
| 7925 | LateParsedTemplateMap[FD] = LPT; |
| 7926 | |
| 7927 | FD->setLateTemplateParsed(true); |
| 7928 | } |
| 7929 | |
| 7930 | void Sema::UnmarkAsLateParsedTemplate(FunctionDecl *FD) { |
| 7931 | if (!FD) |
| 7932 | return; |
| 7933 | FD->setLateTemplateParsed(false); |
| 7934 | } |
Francois Pichet | 8387e2a | 2011-04-22 22:18:13 +0000 | [diff] [blame] | 7935 | |
| 7936 | bool Sema::IsInsideALocalClassWithinATemplateFunction() { |
| 7937 | DeclContext *DC = CurContext; |
| 7938 | |
| 7939 | while (DC) { |
| 7940 | if (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(CurContext)) { |
| 7941 | const FunctionDecl *FD = RD->isLocalClass(); |
| 7942 | return (FD && FD->getTemplatedKind() != FunctionDecl::TK_NonTemplate); |
| 7943 | } else if (DC->isTranslationUnit() || DC->isNamespace()) |
| 7944 | return false; |
| 7945 | |
| 7946 | DC = DC->getParent(); |
| 7947 | } |
| 7948 | return false; |
| 7949 | } |