Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1 | //===--- SemaExprCXX.cpp - Semantic Analysis for Expressions --------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
Chris Lattner | 0bc735f | 2007-12-29 19:59:25 +0000 | [diff] [blame] | 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
James Dennett | 306f179 | 2012-06-22 05:14:59 +0000 | [diff] [blame] | 9 | /// |
| 10 | /// \file |
| 11 | /// \brief Implements semantic analysis for C++ expressions. |
| 12 | /// |
| 13 | //===----------------------------------------------------------------------===// |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 14 | |
John McCall | 2d88708 | 2010-08-25 22:03:47 +0000 | [diff] [blame] | 15 | #include "clang/Sema/SemaInternal.h" |
Chandler Carruth | 55fc873 | 2012-12-04 09:13:33 +0000 | [diff] [blame] | 16 | #include "TypeLocBuilder.h" |
Steve Naroff | 210679c | 2007-08-25 14:02:58 +0000 | [diff] [blame] | 17 | #include "clang/AST/ASTContext.h" |
Douglas Gregor | a8f32e0 | 2009-10-06 17:59:45 +0000 | [diff] [blame] | 18 | #include "clang/AST/CXXInheritance.h" |
Chandler Carruth | 55fc873 | 2012-12-04 09:13:33 +0000 | [diff] [blame] | 19 | #include "clang/AST/CharUnits.h" |
John McCall | 7cd088e | 2010-08-24 07:21:54 +0000 | [diff] [blame] | 20 | #include "clang/AST/DeclObjC.h" |
Anders Carlsson | d497ba7 | 2009-08-26 22:59:12 +0000 | [diff] [blame] | 21 | #include "clang/AST/ExprCXX.h" |
Fariborz Jahanian | d426662 | 2010-06-16 18:56:04 +0000 | [diff] [blame] | 22 | #include "clang/AST/ExprObjC.h" |
Douglas Gregor | b57fb49 | 2010-02-24 22:38:50 +0000 | [diff] [blame] | 23 | #include "clang/AST/TypeLoc.h" |
Anders Carlsson | d497ba7 | 2009-08-26 22:59:12 +0000 | [diff] [blame] | 24 | #include "clang/Basic/PartialDiagnostic.h" |
Sebastian Redl | b5a57a6 | 2008-12-03 20:26:15 +0000 | [diff] [blame] | 25 | #include "clang/Basic/TargetInfo.h" |
Anders Carlsson | d497ba7 | 2009-08-26 22:59:12 +0000 | [diff] [blame] | 26 | #include "clang/Lex/Preprocessor.h" |
Chandler Carruth | 55fc873 | 2012-12-04 09:13:33 +0000 | [diff] [blame] | 27 | #include "clang/Sema/DeclSpec.h" |
| 28 | #include "clang/Sema/Initialization.h" |
| 29 | #include "clang/Sema/Lookup.h" |
| 30 | #include "clang/Sema/ParsedTemplate.h" |
| 31 | #include "clang/Sema/Scope.h" |
| 32 | #include "clang/Sema/ScopeInfo.h" |
| 33 | #include "clang/Sema/TemplateDeduction.h" |
Sebastian Redl | bd45d25 | 2012-02-16 12:59:47 +0000 | [diff] [blame] | 34 | #include "llvm/ADT/APInt.h" |
Douglas Gregor | 3fc749d | 2008-12-23 00:26:44 +0000 | [diff] [blame] | 35 | #include "llvm/ADT/STLExtras.h" |
Chandler Carruth | 73e0a91 | 2011-05-01 07:23:17 +0000 | [diff] [blame] | 36 | #include "llvm/Support/ErrorHandling.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 37 | using namespace clang; |
John McCall | 2a7fb27 | 2010-08-25 05:32:35 +0000 | [diff] [blame] | 38 | using namespace sema; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 39 | |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 40 | ParsedType Sema::getDestructorName(SourceLocation TildeLoc, |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 41 | IdentifierInfo &II, |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 42 | SourceLocation NameLoc, |
| 43 | Scope *S, CXXScopeSpec &SS, |
| 44 | ParsedType ObjectTypePtr, |
| 45 | bool EnteringContext) { |
Douglas Gregor | 124b878 | 2010-02-16 19:09:40 +0000 | [diff] [blame] | 46 | // Determine where to perform name lookup. |
| 47 | |
| 48 | // FIXME: This area of the standard is very messy, and the current |
| 49 | // wording is rather unclear about which scopes we search for the |
| 50 | // destructor name; see core issues 399 and 555. Issue 399 in |
| 51 | // particular shows where the current description of destructor name |
| 52 | // lookup is completely out of line with existing practice, e.g., |
| 53 | // this appears to be ill-formed: |
| 54 | // |
| 55 | // namespace N { |
| 56 | // template <typename T> struct S { |
| 57 | // ~S(); |
| 58 | // }; |
| 59 | // } |
| 60 | // |
| 61 | // void f(N::S<int>* s) { |
| 62 | // s->N::S<int>::~S(); |
| 63 | // } |
| 64 | // |
Douglas Gregor | 93649fd | 2010-02-23 00:15:22 +0000 | [diff] [blame] | 65 | // See also PR6358 and PR6359. |
Sebastian Redl | c0fee50 | 2010-07-07 23:17:38 +0000 | [diff] [blame] | 66 | // For this reason, we're currently only doing the C++03 version of this |
| 67 | // code; the C++0x version has to wait until we get a proper spec. |
Douglas Gregor | 124b878 | 2010-02-16 19:09:40 +0000 | [diff] [blame] | 68 | QualType SearchType; |
| 69 | DeclContext *LookupCtx = 0; |
| 70 | bool isDependent = false; |
| 71 | bool LookInScope = false; |
| 72 | |
| 73 | // If we have an object type, it's because we are in a |
| 74 | // pseudo-destructor-expression or a member access expression, and |
| 75 | // we know what type we're looking for. |
| 76 | if (ObjectTypePtr) |
| 77 | SearchType = GetTypeFromParser(ObjectTypePtr); |
| 78 | |
| 79 | if (SS.isSet()) { |
Douglas Gregor | 93649fd | 2010-02-23 00:15:22 +0000 | [diff] [blame] | 80 | NestedNameSpecifier *NNS = (NestedNameSpecifier *)SS.getScopeRep(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 81 | |
Douglas Gregor | 93649fd | 2010-02-23 00:15:22 +0000 | [diff] [blame] | 82 | bool AlreadySearched = false; |
| 83 | bool LookAtPrefix = true; |
Sebastian Redl | c0fee50 | 2010-07-07 23:17:38 +0000 | [diff] [blame] | 84 | // C++ [basic.lookup.qual]p6: |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 85 | // If a pseudo-destructor-name (5.2.4) contains a nested-name-specifier, |
Sebastian Redl | c0fee50 | 2010-07-07 23:17:38 +0000 | [diff] [blame] | 86 | // the type-names are looked up as types in the scope designated by the |
| 87 | // nested-name-specifier. In a qualified-id of the form: |
NAKAMURA Takumi | 0099530 | 2011-01-27 07:09:49 +0000 | [diff] [blame] | 88 | // |
| 89 | // ::[opt] nested-name-specifier ~ class-name |
Sebastian Redl | c0fee50 | 2010-07-07 23:17:38 +0000 | [diff] [blame] | 90 | // |
| 91 | // where the nested-name-specifier designates a namespace scope, and in |
Chandler Carruth | 5e895a8 | 2010-02-21 10:19:54 +0000 | [diff] [blame] | 92 | // a qualified-id of the form: |
Douglas Gregor | 124b878 | 2010-02-16 19:09:40 +0000 | [diff] [blame] | 93 | // |
NAKAMURA Takumi | 0099530 | 2011-01-27 07:09:49 +0000 | [diff] [blame] | 94 | // ::opt nested-name-specifier class-name :: ~ class-name |
Douglas Gregor | 124b878 | 2010-02-16 19:09:40 +0000 | [diff] [blame] | 95 | // |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 96 | // the class-names are looked up as types in the scope designated by |
Sebastian Redl | c0fee50 | 2010-07-07 23:17:38 +0000 | [diff] [blame] | 97 | // the nested-name-specifier. |
Douglas Gregor | 124b878 | 2010-02-16 19:09:40 +0000 | [diff] [blame] | 98 | // |
Sebastian Redl | c0fee50 | 2010-07-07 23:17:38 +0000 | [diff] [blame] | 99 | // Here, we check the first case (completely) and determine whether the |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 100 | // code below is permitted to look at the prefix of the |
Sebastian Redl | c0fee50 | 2010-07-07 23:17:38 +0000 | [diff] [blame] | 101 | // nested-name-specifier. |
| 102 | DeclContext *DC = computeDeclContext(SS, EnteringContext); |
| 103 | if (DC && DC->isFileContext()) { |
| 104 | AlreadySearched = true; |
| 105 | LookupCtx = DC; |
| 106 | isDependent = false; |
| 107 | } else if (DC && isa<CXXRecordDecl>(DC)) |
| 108 | LookAtPrefix = false; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 109 | |
Sebastian Redl | c0fee50 | 2010-07-07 23:17:38 +0000 | [diff] [blame] | 110 | // The second case from the C++03 rules quoted further above. |
Douglas Gregor | 93649fd | 2010-02-23 00:15:22 +0000 | [diff] [blame] | 111 | NestedNameSpecifier *Prefix = 0; |
| 112 | if (AlreadySearched) { |
| 113 | // Nothing left to do. |
| 114 | } else if (LookAtPrefix && (Prefix = NNS->getPrefix())) { |
| 115 | CXXScopeSpec PrefixSS; |
Douglas Gregor | 7e38494 | 2011-02-25 16:07:42 +0000 | [diff] [blame] | 116 | PrefixSS.Adopt(NestedNameSpecifierLoc(Prefix, SS.location_data())); |
Douglas Gregor | 93649fd | 2010-02-23 00:15:22 +0000 | [diff] [blame] | 117 | LookupCtx = computeDeclContext(PrefixSS, EnteringContext); |
| 118 | isDependent = isDependentScopeSpecifier(PrefixSS); |
Douglas Gregor | 93649fd | 2010-02-23 00:15:22 +0000 | [diff] [blame] | 119 | } else if (ObjectTypePtr) { |
Douglas Gregor | 124b878 | 2010-02-16 19:09:40 +0000 | [diff] [blame] | 120 | LookupCtx = computeDeclContext(SearchType); |
| 121 | isDependent = SearchType->isDependentType(); |
| 122 | } else { |
| 123 | LookupCtx = computeDeclContext(SS, EnteringContext); |
Douglas Gregor | 93649fd | 2010-02-23 00:15:22 +0000 | [diff] [blame] | 124 | isDependent = LookupCtx && LookupCtx->isDependentContext(); |
Douglas Gregor | 124b878 | 2010-02-16 19:09:40 +0000 | [diff] [blame] | 125 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 126 | |
Douglas Gregor | edc9050 | 2010-02-25 04:46:04 +0000 | [diff] [blame] | 127 | LookInScope = false; |
Douglas Gregor | 124b878 | 2010-02-16 19:09:40 +0000 | [diff] [blame] | 128 | } else if (ObjectTypePtr) { |
| 129 | // C++ [basic.lookup.classref]p3: |
| 130 | // If the unqualified-id is ~type-name, the type-name is looked up |
| 131 | // in the context of the entire postfix-expression. If the type T |
| 132 | // of the object expression is of a class type C, the type-name is |
| 133 | // also looked up in the scope of class C. At least one of the |
| 134 | // lookups shall find a name that refers to (possibly |
| 135 | // cv-qualified) T. |
| 136 | LookupCtx = computeDeclContext(SearchType); |
| 137 | isDependent = SearchType->isDependentType(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 138 | assert((isDependent || !SearchType->isIncompleteType()) && |
Douglas Gregor | 124b878 | 2010-02-16 19:09:40 +0000 | [diff] [blame] | 139 | "Caller should have completed object type"); |
| 140 | |
| 141 | LookInScope = true; |
| 142 | } else { |
| 143 | // Perform lookup into the current scope (only). |
| 144 | LookInScope = true; |
| 145 | } |
| 146 | |
Douglas Gregor | 7ec1873 | 2011-03-04 22:32:08 +0000 | [diff] [blame] | 147 | TypeDecl *NonMatchingTypeDecl = 0; |
Douglas Gregor | 124b878 | 2010-02-16 19:09:40 +0000 | [diff] [blame] | 148 | LookupResult Found(*this, &II, NameLoc, LookupOrdinaryName); |
| 149 | for (unsigned Step = 0; Step != 2; ++Step) { |
| 150 | // Look for the name first in the computed lookup context (if we |
Douglas Gregor | 7ec1873 | 2011-03-04 22:32:08 +0000 | [diff] [blame] | 151 | // have one) and, if that fails to find a match, in the scope (if |
Douglas Gregor | 124b878 | 2010-02-16 19:09:40 +0000 | [diff] [blame] | 152 | // we're allowed to look there). |
| 153 | Found.clear(); |
| 154 | if (Step == 0 && LookupCtx) |
| 155 | LookupQualifiedName(Found, LookupCtx); |
Douglas Gregor | a2e7dd2 | 2010-02-25 01:56:36 +0000 | [diff] [blame] | 156 | else if (Step == 1 && LookInScope && S) |
Douglas Gregor | 124b878 | 2010-02-16 19:09:40 +0000 | [diff] [blame] | 157 | LookupName(Found, S); |
| 158 | else |
| 159 | continue; |
| 160 | |
| 161 | // FIXME: Should we be suppressing ambiguities here? |
| 162 | if (Found.isAmbiguous()) |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 163 | return ParsedType(); |
Douglas Gregor | 124b878 | 2010-02-16 19:09:40 +0000 | [diff] [blame] | 164 | |
| 165 | if (TypeDecl *Type = Found.getAsSingle<TypeDecl>()) { |
| 166 | QualType T = Context.getTypeDeclType(Type); |
Douglas Gregor | 124b878 | 2010-02-16 19:09:40 +0000 | [diff] [blame] | 167 | |
| 168 | if (SearchType.isNull() || SearchType->isDependentType() || |
| 169 | Context.hasSameUnqualifiedType(T, SearchType)) { |
| 170 | // We found our type! |
| 171 | |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 172 | return ParsedType::make(T); |
Douglas Gregor | 124b878 | 2010-02-16 19:09:40 +0000 | [diff] [blame] | 173 | } |
John Wiegley | 36784e7 | 2011-03-08 08:13:22 +0000 | [diff] [blame] | 174 | |
Douglas Gregor | 7ec1873 | 2011-03-04 22:32:08 +0000 | [diff] [blame] | 175 | if (!SearchType.isNull()) |
| 176 | NonMatchingTypeDecl = Type; |
Douglas Gregor | 124b878 | 2010-02-16 19:09:40 +0000 | [diff] [blame] | 177 | } |
| 178 | |
| 179 | // If the name that we found is a class template name, and it is |
| 180 | // the same name as the template name in the last part of the |
| 181 | // nested-name-specifier (if present) or the object type, then |
| 182 | // this is the destructor for that class. |
| 183 | // FIXME: This is a workaround until we get real drafting for core |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 184 | // issue 399, for which there isn't even an obvious direction. |
Douglas Gregor | 124b878 | 2010-02-16 19:09:40 +0000 | [diff] [blame] | 185 | if (ClassTemplateDecl *Template = Found.getAsSingle<ClassTemplateDecl>()) { |
| 186 | QualType MemberOfType; |
| 187 | if (SS.isSet()) { |
| 188 | if (DeclContext *Ctx = computeDeclContext(SS, EnteringContext)) { |
| 189 | // Figure out the type of the context, if it has one. |
John McCall | 3cb0ebd | 2010-03-10 03:28:59 +0000 | [diff] [blame] | 190 | if (CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(Ctx)) |
| 191 | MemberOfType = Context.getTypeDeclType(Record); |
Douglas Gregor | 124b878 | 2010-02-16 19:09:40 +0000 | [diff] [blame] | 192 | } |
| 193 | } |
| 194 | if (MemberOfType.isNull()) |
| 195 | MemberOfType = SearchType; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 196 | |
Douglas Gregor | 124b878 | 2010-02-16 19:09:40 +0000 | [diff] [blame] | 197 | if (MemberOfType.isNull()) |
| 198 | continue; |
| 199 | |
| 200 | // We're referring into a class template specialization. If the |
| 201 | // class template we found is the same as the template being |
| 202 | // specialized, we found what we are looking for. |
| 203 | if (const RecordType *Record = MemberOfType->getAs<RecordType>()) { |
| 204 | if (ClassTemplateSpecializationDecl *Spec |
| 205 | = dyn_cast<ClassTemplateSpecializationDecl>(Record->getDecl())) { |
| 206 | if (Spec->getSpecializedTemplate()->getCanonicalDecl() == |
| 207 | Template->getCanonicalDecl()) |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 208 | return ParsedType::make(MemberOfType); |
Douglas Gregor | 124b878 | 2010-02-16 19:09:40 +0000 | [diff] [blame] | 209 | } |
| 210 | |
| 211 | continue; |
| 212 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 213 | |
Douglas Gregor | 124b878 | 2010-02-16 19:09:40 +0000 | [diff] [blame] | 214 | // We're referring to an unresolved class template |
| 215 | // specialization. Determine whether we class template we found |
| 216 | // is the same as the template being specialized or, if we don't |
| 217 | // know which template is being specialized, that it at least |
| 218 | // has the same name. |
| 219 | if (const TemplateSpecializationType *SpecType |
| 220 | = MemberOfType->getAs<TemplateSpecializationType>()) { |
| 221 | TemplateName SpecName = SpecType->getTemplateName(); |
| 222 | |
| 223 | // The class template we found is the same template being |
| 224 | // specialized. |
| 225 | if (TemplateDecl *SpecTemplate = SpecName.getAsTemplateDecl()) { |
| 226 | if (SpecTemplate->getCanonicalDecl() == Template->getCanonicalDecl()) |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 227 | return ParsedType::make(MemberOfType); |
Douglas Gregor | 124b878 | 2010-02-16 19:09:40 +0000 | [diff] [blame] | 228 | |
| 229 | continue; |
| 230 | } |
| 231 | |
| 232 | // The class template we found has the same name as the |
| 233 | // (dependent) template name being specialized. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 234 | if (DependentTemplateName *DepTemplate |
Douglas Gregor | 124b878 | 2010-02-16 19:09:40 +0000 | [diff] [blame] | 235 | = SpecName.getAsDependentTemplateName()) { |
| 236 | if (DepTemplate->isIdentifier() && |
| 237 | DepTemplate->getIdentifier() == Template->getIdentifier()) |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 238 | return ParsedType::make(MemberOfType); |
Douglas Gregor | 124b878 | 2010-02-16 19:09:40 +0000 | [diff] [blame] | 239 | |
| 240 | continue; |
| 241 | } |
| 242 | } |
| 243 | } |
| 244 | } |
| 245 | |
| 246 | if (isDependent) { |
| 247 | // We didn't find our type, but that's okay: it's dependent |
| 248 | // anyway. |
Douglas Gregor | e29425b | 2011-02-28 22:42:13 +0000 | [diff] [blame] | 249 | |
| 250 | // FIXME: What if we have no nested-name-specifier? |
| 251 | QualType T = CheckTypenameType(ETK_None, SourceLocation(), |
| 252 | SS.getWithLocInContext(Context), |
| 253 | II, NameLoc); |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 254 | return ParsedType::make(T); |
Douglas Gregor | 124b878 | 2010-02-16 19:09:40 +0000 | [diff] [blame] | 255 | } |
| 256 | |
Douglas Gregor | 7ec1873 | 2011-03-04 22:32:08 +0000 | [diff] [blame] | 257 | if (NonMatchingTypeDecl) { |
| 258 | QualType T = Context.getTypeDeclType(NonMatchingTypeDecl); |
| 259 | Diag(NameLoc, diag::err_destructor_expr_type_mismatch) |
| 260 | << T << SearchType; |
| 261 | Diag(NonMatchingTypeDecl->getLocation(), diag::note_destructor_type_here) |
| 262 | << T; |
| 263 | } else if (ObjectTypePtr) |
| 264 | Diag(NameLoc, diag::err_ident_in_dtor_not_a_type) |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 265 | << &II; |
Douglas Gregor | 124b878 | 2010-02-16 19:09:40 +0000 | [diff] [blame] | 266 | else |
| 267 | Diag(NameLoc, diag::err_destructor_class_name); |
| 268 | |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 269 | return ParsedType(); |
Douglas Gregor | 124b878 | 2010-02-16 19:09:40 +0000 | [diff] [blame] | 270 | } |
| 271 | |
David Blaikie | 53a75c0 | 2011-12-08 16:13:53 +0000 | [diff] [blame] | 272 | ParsedType Sema::getDestructorType(const DeclSpec& DS, ParsedType ObjectType) { |
David Blaikie | 4db8c44 | 2011-12-12 04:13:55 +0000 | [diff] [blame] | 273 | if (DS.getTypeSpecType() == DeclSpec::TST_error || !ObjectType) |
David Blaikie | 53a75c0 | 2011-12-08 16:13:53 +0000 | [diff] [blame] | 274 | return ParsedType(); |
| 275 | assert(DS.getTypeSpecType() == DeclSpec::TST_decltype |
| 276 | && "only get destructor types from declspecs"); |
| 277 | QualType T = BuildDecltypeType(DS.getRepAsExpr(), DS.getTypeSpecTypeLoc()); |
| 278 | QualType SearchType = GetTypeFromParser(ObjectType); |
| 279 | if (SearchType->isDependentType() || Context.hasSameUnqualifiedType(SearchType, T)) { |
| 280 | return ParsedType::make(T); |
| 281 | } |
| 282 | |
| 283 | Diag(DS.getTypeSpecTypeLoc(), diag::err_destructor_expr_type_mismatch) |
| 284 | << T << SearchType; |
| 285 | return ParsedType(); |
| 286 | } |
| 287 | |
Douglas Gregor | 57fdc8a | 2010-04-26 22:37:10 +0000 | [diff] [blame] | 288 | /// \brief Build a C++ typeid expression with a type operand. |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 289 | ExprResult Sema::BuildCXXTypeId(QualType TypeInfoType, |
Douglas Gregor | 4eb4f0f | 2010-09-08 23:14:30 +0000 | [diff] [blame] | 290 | SourceLocation TypeidLoc, |
| 291 | TypeSourceInfo *Operand, |
| 292 | SourceLocation RParenLoc) { |
Douglas Gregor | 57fdc8a | 2010-04-26 22:37:10 +0000 | [diff] [blame] | 293 | // C++ [expr.typeid]p4: |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 294 | // The top-level cv-qualifiers of the lvalue expression or the type-id |
Douglas Gregor | 57fdc8a | 2010-04-26 22:37:10 +0000 | [diff] [blame] | 295 | // that is the operand of typeid are always ignored. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 296 | // If the type of the type-id is a class type or a reference to a class |
Douglas Gregor | 57fdc8a | 2010-04-26 22:37:10 +0000 | [diff] [blame] | 297 | // type, the class shall be completely-defined. |
Douglas Gregor | d1c1d7b | 2010-06-02 06:16:02 +0000 | [diff] [blame] | 298 | Qualifiers Quals; |
| 299 | QualType T |
| 300 | = Context.getUnqualifiedArrayType(Operand->getType().getNonReferenceType(), |
| 301 | Quals); |
Douglas Gregor | 57fdc8a | 2010-04-26 22:37:10 +0000 | [diff] [blame] | 302 | if (T->getAs<RecordType>() && |
| 303 | RequireCompleteType(TypeidLoc, T, diag::err_incomplete_typeid)) |
| 304 | return ExprError(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 305 | |
Douglas Gregor | 57fdc8a | 2010-04-26 22:37:10 +0000 | [diff] [blame] | 306 | return Owned(new (Context) CXXTypeidExpr(TypeInfoType.withConst(), |
| 307 | Operand, |
| 308 | SourceRange(TypeidLoc, RParenLoc))); |
| 309 | } |
| 310 | |
| 311 | /// \brief Build a C++ typeid expression with an expression operand. |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 312 | ExprResult Sema::BuildCXXTypeId(QualType TypeInfoType, |
Douglas Gregor | 4eb4f0f | 2010-09-08 23:14:30 +0000 | [diff] [blame] | 313 | SourceLocation TypeidLoc, |
| 314 | Expr *E, |
| 315 | SourceLocation RParenLoc) { |
Douglas Gregor | 57fdc8a | 2010-04-26 22:37:10 +0000 | [diff] [blame] | 316 | if (E && !E->isTypeDependent()) { |
John McCall | 6dbba4f | 2011-10-11 23:14:30 +0000 | [diff] [blame] | 317 | if (E->getType()->isPlaceholderType()) { |
| 318 | ExprResult result = CheckPlaceholderExpr(E); |
| 319 | if (result.isInvalid()) return ExprError(); |
| 320 | E = result.take(); |
| 321 | } |
| 322 | |
Douglas Gregor | 57fdc8a | 2010-04-26 22:37:10 +0000 | [diff] [blame] | 323 | QualType T = E->getType(); |
| 324 | if (const RecordType *RecordT = T->getAs<RecordType>()) { |
| 325 | CXXRecordDecl *RecordD = cast<CXXRecordDecl>(RecordT->getDecl()); |
| 326 | // C++ [expr.typeid]p3: |
| 327 | // [...] If the type of the expression is a class type, the class |
| 328 | // shall be completely-defined. |
| 329 | if (RequireCompleteType(TypeidLoc, T, diag::err_incomplete_typeid)) |
| 330 | return ExprError(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 331 | |
Douglas Gregor | 57fdc8a | 2010-04-26 22:37:10 +0000 | [diff] [blame] | 332 | // C++ [expr.typeid]p3: |
Sebastian Redl | 906082e | 2010-07-20 04:20:21 +0000 | [diff] [blame] | 333 | // When typeid is applied to an expression other than an glvalue of a |
Douglas Gregor | 57fdc8a | 2010-04-26 22:37:10 +0000 | [diff] [blame] | 334 | // polymorphic class type [...] [the] expression is an unevaluated |
| 335 | // operand. [...] |
Richard Smith | 0d72910 | 2012-08-13 20:08:14 +0000 | [diff] [blame] | 336 | if (RecordD->isPolymorphic() && E->isGLValue()) { |
Eli Friedman | ef331b7 | 2012-01-20 01:26:23 +0000 | [diff] [blame] | 337 | // The subexpression is potentially evaluated; switch the context |
| 338 | // and recheck the subexpression. |
Benjamin Kramer | accaf19 | 2012-11-14 15:08:31 +0000 | [diff] [blame] | 339 | ExprResult Result = TransformToPotentiallyEvaluated(E); |
Eli Friedman | ef331b7 | 2012-01-20 01:26:23 +0000 | [diff] [blame] | 340 | if (Result.isInvalid()) return ExprError(); |
| 341 | E = Result.take(); |
Douglas Gregor | 6fb745b | 2010-05-13 16:44:06 +0000 | [diff] [blame] | 342 | |
| 343 | // We require a vtable to query the type at run time. |
| 344 | MarkVTableUsed(TypeidLoc, RecordD); |
| 345 | } |
Douglas Gregor | 57fdc8a | 2010-04-26 22:37:10 +0000 | [diff] [blame] | 346 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 347 | |
Douglas Gregor | 57fdc8a | 2010-04-26 22:37:10 +0000 | [diff] [blame] | 348 | // C++ [expr.typeid]p4: |
| 349 | // [...] If the type of the type-id is a reference to a possibly |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 350 | // cv-qualified type, the result of the typeid expression refers to a |
| 351 | // std::type_info object representing the cv-unqualified referenced |
Douglas Gregor | 57fdc8a | 2010-04-26 22:37:10 +0000 | [diff] [blame] | 352 | // type. |
Douglas Gregor | d1c1d7b | 2010-06-02 06:16:02 +0000 | [diff] [blame] | 353 | Qualifiers Quals; |
| 354 | QualType UnqualT = Context.getUnqualifiedArrayType(T, Quals); |
| 355 | if (!Context.hasSameType(T, UnqualT)) { |
| 356 | T = UnqualT; |
Eli Friedman | c1c0dfb | 2011-09-27 21:58:52 +0000 | [diff] [blame] | 357 | E = ImpCastExprToType(E, UnqualT, CK_NoOp, E->getValueKind()).take(); |
Douglas Gregor | 57fdc8a | 2010-04-26 22:37:10 +0000 | [diff] [blame] | 358 | } |
| 359 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 360 | |
Douglas Gregor | 57fdc8a | 2010-04-26 22:37:10 +0000 | [diff] [blame] | 361 | return Owned(new (Context) CXXTypeidExpr(TypeInfoType.withConst(), |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 362 | E, |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 363 | SourceRange(TypeidLoc, RParenLoc))); |
Douglas Gregor | 57fdc8a | 2010-04-26 22:37:10 +0000 | [diff] [blame] | 364 | } |
| 365 | |
| 366 | /// ActOnCXXTypeidOfType - Parse typeid( type-id ) or typeid (expression); |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 367 | ExprResult |
Sebastian Redl | c42e118 | 2008-11-11 11:37:55 +0000 | [diff] [blame] | 368 | Sema::ActOnCXXTypeid(SourceLocation OpLoc, SourceLocation LParenLoc, |
| 369 | bool isType, void *TyOrExpr, SourceLocation RParenLoc) { |
Douglas Gregor | 57fdc8a | 2010-04-26 22:37:10 +0000 | [diff] [blame] | 370 | // Find the std::type_info type. |
Sebastian Redl | ce0682f | 2011-03-31 19:29:24 +0000 | [diff] [blame] | 371 | if (!getStdNamespace()) |
Sebastian Redl | f53597f | 2009-03-15 17:47:39 +0000 | [diff] [blame] | 372 | return ExprError(Diag(OpLoc, diag::err_need_header_before_typeid)); |
Argyrios Kyrtzidis | e866190 | 2009-08-19 01:28:28 +0000 | [diff] [blame] | 373 | |
Douglas Gregor | 4eb4f0f | 2010-09-08 23:14:30 +0000 | [diff] [blame] | 374 | if (!CXXTypeInfoDecl) { |
| 375 | IdentifierInfo *TypeInfoII = &PP.getIdentifierTable().get("type_info"); |
| 376 | LookupResult R(*this, TypeInfoII, SourceLocation(), LookupTagName); |
| 377 | LookupQualifiedName(R, getStdNamespace()); |
| 378 | CXXTypeInfoDecl = R.getAsSingle<RecordDecl>(); |
Nico Weber | ed36b2a | 2012-06-19 23:58:27 +0000 | [diff] [blame] | 379 | // Microsoft's typeinfo doesn't have type_info in std but in the global |
| 380 | // namespace if _HAS_EXCEPTIONS is defined to 0. See PR13153. |
| 381 | if (!CXXTypeInfoDecl && LangOpts.MicrosoftMode) { |
| 382 | LookupQualifiedName(R, Context.getTranslationUnitDecl()); |
| 383 | CXXTypeInfoDecl = R.getAsSingle<RecordDecl>(); |
| 384 | } |
Douglas Gregor | 4eb4f0f | 2010-09-08 23:14:30 +0000 | [diff] [blame] | 385 | if (!CXXTypeInfoDecl) |
| 386 | return ExprError(Diag(OpLoc, diag::err_need_header_before_typeid)); |
| 387 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 388 | |
Nico Weber | 11d1a69 | 2012-05-20 01:27:21 +0000 | [diff] [blame] | 389 | if (!getLangOpts().RTTI) { |
| 390 | return ExprError(Diag(OpLoc, diag::err_no_typeid_with_fno_rtti)); |
| 391 | } |
| 392 | |
Douglas Gregor | 4eb4f0f | 2010-09-08 23:14:30 +0000 | [diff] [blame] | 393 | QualType TypeInfoType = Context.getTypeDeclType(CXXTypeInfoDecl); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 394 | |
Douglas Gregor | 57fdc8a | 2010-04-26 22:37:10 +0000 | [diff] [blame] | 395 | if (isType) { |
| 396 | // The operand is a type; handle it as such. |
| 397 | TypeSourceInfo *TInfo = 0; |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 398 | QualType T = GetTypeFromParser(ParsedType::getFromOpaquePtr(TyOrExpr), |
| 399 | &TInfo); |
Douglas Gregor | 57fdc8a | 2010-04-26 22:37:10 +0000 | [diff] [blame] | 400 | if (T.isNull()) |
| 401 | return ExprError(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 402 | |
Douglas Gregor | 57fdc8a | 2010-04-26 22:37:10 +0000 | [diff] [blame] | 403 | if (!TInfo) |
| 404 | TInfo = Context.getTrivialTypeSourceInfo(T, OpLoc); |
Sebastian Redl | c42e118 | 2008-11-11 11:37:55 +0000 | [diff] [blame] | 405 | |
Douglas Gregor | 57fdc8a | 2010-04-26 22:37:10 +0000 | [diff] [blame] | 406 | return BuildCXXTypeId(TypeInfoType, OpLoc, TInfo, RParenLoc); |
Douglas Gregor | ac7610d | 2009-06-22 20:57:11 +0000 | [diff] [blame] | 407 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 408 | |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 409 | // The operand is an expression. |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 410 | return BuildCXXTypeId(TypeInfoType, OpLoc, (Expr*)TyOrExpr, RParenLoc); |
Sebastian Redl | c42e118 | 2008-11-11 11:37:55 +0000 | [diff] [blame] | 411 | } |
| 412 | |
Francois Pichet | 01b7c30 | 2010-09-08 12:20:18 +0000 | [diff] [blame] | 413 | /// \brief Build a Microsoft __uuidof expression with a type operand. |
| 414 | ExprResult Sema::BuildCXXUuidof(QualType TypeInfoType, |
| 415 | SourceLocation TypeidLoc, |
| 416 | TypeSourceInfo *Operand, |
| 417 | SourceLocation RParenLoc) { |
Francois Pichet | 6915c52 | 2010-12-27 01:32:00 +0000 | [diff] [blame] | 418 | if (!Operand->getType()->isDependentType()) { |
Nico Weber | c5f8046 | 2012-10-11 10:13:44 +0000 | [diff] [blame] | 419 | if (!CXXUuidofExpr::GetUuidAttrOfType(Operand->getType())) |
Francois Pichet | 6915c52 | 2010-12-27 01:32:00 +0000 | [diff] [blame] | 420 | return ExprError(Diag(TypeidLoc, diag::err_uuidof_without_guid)); |
| 421 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 422 | |
Francois Pichet | 01b7c30 | 2010-09-08 12:20:18 +0000 | [diff] [blame] | 423 | // FIXME: add __uuidof semantic analysis for type operand. |
| 424 | return Owned(new (Context) CXXUuidofExpr(TypeInfoType.withConst(), |
| 425 | Operand, |
| 426 | SourceRange(TypeidLoc, RParenLoc))); |
| 427 | } |
| 428 | |
| 429 | /// \brief Build a Microsoft __uuidof expression with an expression operand. |
| 430 | ExprResult Sema::BuildCXXUuidof(QualType TypeInfoType, |
| 431 | SourceLocation TypeidLoc, |
| 432 | Expr *E, |
| 433 | SourceLocation RParenLoc) { |
Francois Pichet | 6915c52 | 2010-12-27 01:32:00 +0000 | [diff] [blame] | 434 | if (!E->getType()->isDependentType()) { |
Nico Weber | c5f8046 | 2012-10-11 10:13:44 +0000 | [diff] [blame] | 435 | if (!CXXUuidofExpr::GetUuidAttrOfType(E->getType()) && |
Francois Pichet | 6915c52 | 2010-12-27 01:32:00 +0000 | [diff] [blame] | 436 | !E->isNullPointerConstant(Context, Expr::NPC_ValueDependentIsNull)) |
| 437 | return ExprError(Diag(TypeidLoc, diag::err_uuidof_without_guid)); |
| 438 | } |
| 439 | // FIXME: add __uuidof semantic analysis for type operand. |
Francois Pichet | 01b7c30 | 2010-09-08 12:20:18 +0000 | [diff] [blame] | 440 | return Owned(new (Context) CXXUuidofExpr(TypeInfoType.withConst(), |
| 441 | E, |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 442 | SourceRange(TypeidLoc, RParenLoc))); |
Francois Pichet | 01b7c30 | 2010-09-08 12:20:18 +0000 | [diff] [blame] | 443 | } |
| 444 | |
| 445 | /// ActOnCXXUuidof - Parse __uuidof( type-id ) or __uuidof (expression); |
| 446 | ExprResult |
| 447 | Sema::ActOnCXXUuidof(SourceLocation OpLoc, SourceLocation LParenLoc, |
| 448 | bool isType, void *TyOrExpr, SourceLocation RParenLoc) { |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 449 | // If MSVCGuidDecl has not been cached, do the lookup. |
Francois Pichet | 01b7c30 | 2010-09-08 12:20:18 +0000 | [diff] [blame] | 450 | if (!MSVCGuidDecl) { |
| 451 | IdentifierInfo *GuidII = &PP.getIdentifierTable().get("_GUID"); |
| 452 | LookupResult R(*this, GuidII, SourceLocation(), LookupTagName); |
| 453 | LookupQualifiedName(R, Context.getTranslationUnitDecl()); |
| 454 | MSVCGuidDecl = R.getAsSingle<RecordDecl>(); |
| 455 | if (!MSVCGuidDecl) |
| 456 | return ExprError(Diag(OpLoc, diag::err_need_header_before_ms_uuidof)); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 457 | } |
| 458 | |
Francois Pichet | 01b7c30 | 2010-09-08 12:20:18 +0000 | [diff] [blame] | 459 | QualType GuidType = Context.getTypeDeclType(MSVCGuidDecl); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 460 | |
Francois Pichet | 01b7c30 | 2010-09-08 12:20:18 +0000 | [diff] [blame] | 461 | if (isType) { |
| 462 | // The operand is a type; handle it as such. |
| 463 | TypeSourceInfo *TInfo = 0; |
| 464 | QualType T = GetTypeFromParser(ParsedType::getFromOpaquePtr(TyOrExpr), |
| 465 | &TInfo); |
| 466 | if (T.isNull()) |
| 467 | return ExprError(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 468 | |
Francois Pichet | 01b7c30 | 2010-09-08 12:20:18 +0000 | [diff] [blame] | 469 | if (!TInfo) |
| 470 | TInfo = Context.getTrivialTypeSourceInfo(T, OpLoc); |
| 471 | |
| 472 | return BuildCXXUuidof(GuidType, OpLoc, TInfo, RParenLoc); |
| 473 | } |
| 474 | |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 475 | // The operand is an expression. |
Francois Pichet | 01b7c30 | 2010-09-08 12:20:18 +0000 | [diff] [blame] | 476 | return BuildCXXUuidof(GuidType, OpLoc, (Expr*)TyOrExpr, RParenLoc); |
| 477 | } |
| 478 | |
Steve Naroff | 1b273c4 | 2007-09-16 14:56:35 +0000 | [diff] [blame] | 479 | /// ActOnCXXBoolLiteral - Parse {true,false} literals. |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 480 | ExprResult |
Steve Naroff | 1b273c4 | 2007-09-16 14:56:35 +0000 | [diff] [blame] | 481 | Sema::ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind) { |
Douglas Gregor | 2f639b9 | 2008-10-24 15:36:09 +0000 | [diff] [blame] | 482 | assert((Kind == tok::kw_true || Kind == tok::kw_false) && |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 483 | "Unknown C++ Boolean value!"); |
Sebastian Redl | f53597f | 2009-03-15 17:47:39 +0000 | [diff] [blame] | 484 | return Owned(new (Context) CXXBoolLiteralExpr(Kind == tok::kw_true, |
| 485 | Context.BoolTy, OpLoc)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 486 | } |
Chris Lattner | 50dd289 | 2008-02-26 00:51:44 +0000 | [diff] [blame] | 487 | |
Sebastian Redl | 6e8ed16 | 2009-05-10 18:38:11 +0000 | [diff] [blame] | 488 | /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 489 | ExprResult |
Sebastian Redl | 6e8ed16 | 2009-05-10 18:38:11 +0000 | [diff] [blame] | 490 | Sema::ActOnCXXNullPtrLiteral(SourceLocation Loc) { |
| 491 | return Owned(new (Context) CXXNullPtrLiteralExpr(Context.NullPtrTy, Loc)); |
| 492 | } |
| 493 | |
Chris Lattner | 50dd289 | 2008-02-26 00:51:44 +0000 | [diff] [blame] | 494 | /// ActOnCXXThrow - Parse throw expressions. |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 495 | ExprResult |
Douglas Gregor | bca01b4 | 2011-07-06 22:04:06 +0000 | [diff] [blame] | 496 | Sema::ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *Ex) { |
| 497 | bool IsThrownVarInScope = false; |
| 498 | if (Ex) { |
| 499 | // C++0x [class.copymove]p31: |
| 500 | // When certain criteria are met, an implementation is allowed to omit the |
| 501 | // copy/move construction of a class object [...] |
| 502 | // |
| 503 | // - in a throw-expression, when the operand is the name of a |
| 504 | // non-volatile automatic object (other than a function or catch- |
| 505 | // clause parameter) whose scope does not extend beyond the end of the |
| 506 | // innermost enclosing try-block (if there is one), the copy/move |
| 507 | // operation from the operand to the exception object (15.1) can be |
| 508 | // omitted by constructing the automatic object directly into the |
| 509 | // exception object |
| 510 | if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Ex->IgnoreParens())) |
| 511 | if (VarDecl *Var = dyn_cast<VarDecl>(DRE->getDecl())) { |
| 512 | if (Var->hasLocalStorage() && !Var->getType().isVolatileQualified()) { |
| 513 | for( ; S; S = S->getParent()) { |
| 514 | if (S->isDeclScope(Var)) { |
| 515 | IsThrownVarInScope = true; |
| 516 | break; |
| 517 | } |
| 518 | |
| 519 | if (S->getFlags() & |
| 520 | (Scope::FnScope | Scope::ClassScope | Scope::BlockScope | |
| 521 | Scope::FunctionPrototypeScope | Scope::ObjCMethodScope | |
| 522 | Scope::TryScope)) |
| 523 | break; |
| 524 | } |
| 525 | } |
| 526 | } |
| 527 | } |
| 528 | |
| 529 | return BuildCXXThrow(OpLoc, Ex, IsThrownVarInScope); |
| 530 | } |
| 531 | |
| 532 | ExprResult Sema::BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, |
| 533 | bool IsThrownVarInScope) { |
Anders Carlsson | 729b853 | 2011-02-23 03:46:46 +0000 | [diff] [blame] | 534 | // Don't report an error if 'throw' is used in system headers. |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 535 | if (!getLangOpts().CXXExceptions && |
Anders Carlsson | 729b853 | 2011-02-23 03:46:46 +0000 | [diff] [blame] | 536 | !getSourceManager().isInSystemHeader(OpLoc)) |
Anders Carlsson | b1fba31 | 2011-02-19 21:53:09 +0000 | [diff] [blame] | 537 | Diag(OpLoc, diag::err_exceptions_disabled) << "throw"; |
Douglas Gregor | bca01b4 | 2011-07-06 22:04:06 +0000 | [diff] [blame] | 538 | |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 539 | if (Ex && !Ex->isTypeDependent()) { |
Douglas Gregor | bca01b4 | 2011-07-06 22:04:06 +0000 | [diff] [blame] | 540 | ExprResult ExRes = CheckCXXThrowOperand(OpLoc, Ex, IsThrownVarInScope); |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 541 | if (ExRes.isInvalid()) |
| 542 | return ExprError(); |
| 543 | Ex = ExRes.take(); |
| 544 | } |
Douglas Gregor | bca01b4 | 2011-07-06 22:04:06 +0000 | [diff] [blame] | 545 | |
| 546 | return Owned(new (Context) CXXThrowExpr(Ex, Context.VoidTy, OpLoc, |
| 547 | IsThrownVarInScope)); |
Sebastian Redl | 972041f | 2009-04-27 20:27:31 +0000 | [diff] [blame] | 548 | } |
| 549 | |
| 550 | /// CheckCXXThrowOperand - Validate the operand of a throw. |
Douglas Gregor | bca01b4 | 2011-07-06 22:04:06 +0000 | [diff] [blame] | 551 | ExprResult Sema::CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, |
| 552 | bool IsThrownVarInScope) { |
Sebastian Redl | 972041f | 2009-04-27 20:27:31 +0000 | [diff] [blame] | 553 | // C++ [except.throw]p3: |
Douglas Gregor | 154fe98 | 2009-12-23 22:04:40 +0000 | [diff] [blame] | 554 | // A throw-expression initializes a temporary object, called the exception |
| 555 | // object, the type of which is determined by removing any top-level |
| 556 | // cv-qualifiers from the static type of the operand of throw and adjusting |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 557 | // the type from "array of T" or "function returning T" to "pointer to T" |
Douglas Gregor | 154fe98 | 2009-12-23 22:04:40 +0000 | [diff] [blame] | 558 | // or "pointer to function returning T", [...] |
| 559 | if (E->getType().hasQualifiers()) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 560 | E = ImpCastExprToType(E, E->getType().getUnqualifiedType(), CK_NoOp, |
Eli Friedman | c1c0dfb | 2011-09-27 21:58:52 +0000 | [diff] [blame] | 561 | E->getValueKind()).take(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 562 | |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 563 | ExprResult Res = DefaultFunctionArrayConversion(E); |
| 564 | if (Res.isInvalid()) |
| 565 | return ExprError(); |
| 566 | E = Res.take(); |
Sebastian Redl | 972041f | 2009-04-27 20:27:31 +0000 | [diff] [blame] | 567 | |
| 568 | // If the type of the exception would be an incomplete type or a pointer |
| 569 | // to an incomplete type other than (cv) void the program is ill-formed. |
| 570 | QualType Ty = E->getType(); |
John McCall | ac41816 | 2010-04-22 01:10:34 +0000 | [diff] [blame] | 571 | bool isPointer = false; |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 572 | if (const PointerType* Ptr = Ty->getAs<PointerType>()) { |
Sebastian Redl | 972041f | 2009-04-27 20:27:31 +0000 | [diff] [blame] | 573 | Ty = Ptr->getPointeeType(); |
John McCall | ac41816 | 2010-04-22 01:10:34 +0000 | [diff] [blame] | 574 | isPointer = true; |
Sebastian Redl | 972041f | 2009-04-27 20:27:31 +0000 | [diff] [blame] | 575 | } |
| 576 | if (!isPointer || !Ty->isVoidType()) { |
| 577 | if (RequireCompleteType(ThrowLoc, Ty, |
Douglas Gregor | d10099e | 2012-05-04 16:32:21 +0000 | [diff] [blame] | 578 | isPointer? diag::err_throw_incomplete_ptr |
| 579 | : diag::err_throw_incomplete, |
| 580 | E->getSourceRange())) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 581 | return ExprError(); |
Rafael Espindola | 7b9a5aa | 2010-03-02 21:28:26 +0000 | [diff] [blame] | 582 | |
Douglas Gregor | bf422f9 | 2010-04-15 18:05:39 +0000 | [diff] [blame] | 583 | if (RequireNonAbstractType(ThrowLoc, E->getType(), |
Douglas Gregor | 6a26e2e | 2012-05-04 17:09:59 +0000 | [diff] [blame] | 584 | diag::err_throw_abstract_type, E)) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 585 | return ExprError(); |
Sebastian Redl | 972041f | 2009-04-27 20:27:31 +0000 | [diff] [blame] | 586 | } |
| 587 | |
John McCall | ac41816 | 2010-04-22 01:10:34 +0000 | [diff] [blame] | 588 | // Initialize the exception result. This implicitly weeds out |
| 589 | // abstract types or types with inaccessible copy constructors. |
Douglas Gregor | bca01b4 | 2011-07-06 22:04:06 +0000 | [diff] [blame] | 590 | |
| 591 | // C++0x [class.copymove]p31: |
| 592 | // When certain criteria are met, an implementation is allowed to omit the |
| 593 | // copy/move construction of a class object [...] |
| 594 | // |
| 595 | // - in a throw-expression, when the operand is the name of a |
| 596 | // non-volatile automatic object (other than a function or catch-clause |
| 597 | // parameter) whose scope does not extend beyond the end of the |
| 598 | // innermost enclosing try-block (if there is one), the copy/move |
| 599 | // operation from the operand to the exception object (15.1) can be |
| 600 | // omitted by constructing the automatic object directly into the |
| 601 | // exception object |
| 602 | const VarDecl *NRVOVariable = 0; |
| 603 | if (IsThrownVarInScope) |
| 604 | NRVOVariable = getCopyElisionCandidate(QualType(), E, false); |
| 605 | |
John McCall | ac41816 | 2010-04-22 01:10:34 +0000 | [diff] [blame] | 606 | InitializedEntity Entity = |
Douglas Gregor | 72dfa27 | 2011-01-21 22:46:35 +0000 | [diff] [blame] | 607 | InitializedEntity::InitializeException(ThrowLoc, E->getType(), |
Douglas Gregor | bca01b4 | 2011-07-06 22:04:06 +0000 | [diff] [blame] | 608 | /*NRVO=*/NRVOVariable != 0); |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 609 | Res = PerformMoveOrCopyInitialization(Entity, NRVOVariable, |
Douglas Gregor | bca01b4 | 2011-07-06 22:04:06 +0000 | [diff] [blame] | 610 | QualType(), E, |
| 611 | IsThrownVarInScope); |
John McCall | ac41816 | 2010-04-22 01:10:34 +0000 | [diff] [blame] | 612 | if (Res.isInvalid()) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 613 | return ExprError(); |
| 614 | E = Res.take(); |
Douglas Gregor | 6fb745b | 2010-05-13 16:44:06 +0000 | [diff] [blame] | 615 | |
Eli Friedman | 5ed9b93 | 2010-06-03 20:39:03 +0000 | [diff] [blame] | 616 | // If the exception has class type, we need additional handling. |
| 617 | const RecordType *RecordTy = Ty->getAs<RecordType>(); |
| 618 | if (!RecordTy) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 619 | return Owned(E); |
Eli Friedman | 5ed9b93 | 2010-06-03 20:39:03 +0000 | [diff] [blame] | 620 | CXXRecordDecl *RD = cast<CXXRecordDecl>(RecordTy->getDecl()); |
| 621 | |
Douglas Gregor | 6fb745b | 2010-05-13 16:44:06 +0000 | [diff] [blame] | 622 | // If we are throwing a polymorphic class type or pointer thereof, |
| 623 | // exception handling will make use of the vtable. |
Eli Friedman | 5ed9b93 | 2010-06-03 20:39:03 +0000 | [diff] [blame] | 624 | MarkVTableUsed(ThrowLoc, RD); |
| 625 | |
Eli Friedman | 98efb9f | 2010-10-12 20:32:36 +0000 | [diff] [blame] | 626 | // If a pointer is thrown, the referenced object will not be destroyed. |
| 627 | if (isPointer) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 628 | return Owned(E); |
Eli Friedman | 98efb9f | 2010-10-12 20:32:36 +0000 | [diff] [blame] | 629 | |
Richard Smith | 213d70b | 2012-02-18 04:13:32 +0000 | [diff] [blame] | 630 | // If the class has a destructor, we must be able to call it. |
| 631 | if (RD->hasIrrelevantDestructor()) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 632 | return Owned(E); |
Eli Friedman | 5ed9b93 | 2010-06-03 20:39:03 +0000 | [diff] [blame] | 633 | |
Sebastian Redl | 2835745 | 2012-03-05 19:35:43 +0000 | [diff] [blame] | 634 | CXXDestructorDecl *Destructor = LookupDestructor(RD); |
Eli Friedman | 5ed9b93 | 2010-06-03 20:39:03 +0000 | [diff] [blame] | 635 | if (!Destructor) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 636 | return Owned(E); |
Eli Friedman | 5ed9b93 | 2010-06-03 20:39:03 +0000 | [diff] [blame] | 637 | |
Eli Friedman | 5f2987c | 2012-02-02 03:46:19 +0000 | [diff] [blame] | 638 | MarkFunctionReferenced(E->getExprLoc(), Destructor); |
Eli Friedman | 5ed9b93 | 2010-06-03 20:39:03 +0000 | [diff] [blame] | 639 | CheckDestructorAccess(E->getExprLoc(), Destructor, |
Douglas Gregor | ed8abf1 | 2010-07-08 06:14:04 +0000 | [diff] [blame] | 640 | PDiag(diag::err_access_dtor_exception) << Ty); |
Richard Smith | 213d70b | 2012-02-18 04:13:32 +0000 | [diff] [blame] | 641 | DiagnoseUseOfDecl(Destructor, E->getExprLoc()); |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 642 | return Owned(E); |
Chris Lattner | 50dd289 | 2008-02-26 00:51:44 +0000 | [diff] [blame] | 643 | } |
Argyrios Kyrtzidis | 0795232 | 2008-07-01 10:37:29 +0000 | [diff] [blame] | 644 | |
Eli Friedman | 72899c3 | 2012-01-07 04:59:52 +0000 | [diff] [blame] | 645 | QualType Sema::getCurrentThisType() { |
| 646 | DeclContext *DC = getFunctionLevelDeclContext(); |
Douglas Gregor | cefc3af | 2012-04-16 07:05:22 +0000 | [diff] [blame] | 647 | QualType ThisTy = CXXThisTypeOverride; |
Richard Smith | 7a614d8 | 2011-06-11 17:19:42 +0000 | [diff] [blame] | 648 | if (CXXMethodDecl *method = dyn_cast<CXXMethodDecl>(DC)) { |
| 649 | if (method && method->isInstance()) |
| 650 | ThisTy = method->getThisType(Context); |
Richard Smith | 7a614d8 | 2011-06-11 17:19:42 +0000 | [diff] [blame] | 651 | } |
Douglas Gregor | cefc3af | 2012-04-16 07:05:22 +0000 | [diff] [blame] | 652 | |
Richard Smith | 7a614d8 | 2011-06-11 17:19:42 +0000 | [diff] [blame] | 653 | return ThisTy; |
John McCall | 5808ce4 | 2011-02-03 08:15:49 +0000 | [diff] [blame] | 654 | } |
| 655 | |
Douglas Gregor | cefc3af | 2012-04-16 07:05:22 +0000 | [diff] [blame] | 656 | Sema::CXXThisScopeRAII::CXXThisScopeRAII(Sema &S, |
| 657 | Decl *ContextDecl, |
| 658 | unsigned CXXThisTypeQuals, |
| 659 | bool Enabled) |
| 660 | : S(S), OldCXXThisTypeOverride(S.CXXThisTypeOverride), Enabled(false) |
| 661 | { |
| 662 | if (!Enabled || !ContextDecl) |
| 663 | return; |
| 664 | |
| 665 | CXXRecordDecl *Record = 0; |
| 666 | if (ClassTemplateDecl *Template = dyn_cast<ClassTemplateDecl>(ContextDecl)) |
| 667 | Record = Template->getTemplatedDecl(); |
| 668 | else |
| 669 | Record = cast<CXXRecordDecl>(ContextDecl); |
| 670 | |
| 671 | S.CXXThisTypeOverride |
| 672 | = S.Context.getPointerType( |
| 673 | S.Context.getRecordType(Record).withCVRQualifiers(CXXThisTypeQuals)); |
| 674 | |
| 675 | this->Enabled = true; |
| 676 | } |
| 677 | |
| 678 | |
| 679 | Sema::CXXThisScopeRAII::~CXXThisScopeRAII() { |
| 680 | if (Enabled) { |
| 681 | S.CXXThisTypeOverride = OldCXXThisTypeOverride; |
| 682 | } |
| 683 | } |
| 684 | |
Douglas Gregor | a1f2114 | 2012-02-01 17:04:21 +0000 | [diff] [blame] | 685 | void Sema::CheckCXXThisCapture(SourceLocation Loc, bool Explicit) { |
Eli Friedman | 72899c3 | 2012-01-07 04:59:52 +0000 | [diff] [blame] | 686 | // We don't need to capture this in an unevaluated context. |
Douglas Gregor | a1f2114 | 2012-02-01 17:04:21 +0000 | [diff] [blame] | 687 | if (ExprEvalContexts.back().Context == Unevaluated && !Explicit) |
Eli Friedman | 72899c3 | 2012-01-07 04:59:52 +0000 | [diff] [blame] | 688 | return; |
| 689 | |
| 690 | // Otherwise, check that we can capture 'this'. |
| 691 | unsigned NumClosures = 0; |
| 692 | for (unsigned idx = FunctionScopes.size() - 1; idx != 0; idx--) { |
Eli Friedman | b69b42c | 2012-01-11 02:36:31 +0000 | [diff] [blame] | 693 | if (CapturingScopeInfo *CSI = |
| 694 | dyn_cast<CapturingScopeInfo>(FunctionScopes[idx])) { |
| 695 | if (CSI->CXXThisCaptureIndex != 0) { |
| 696 | // 'this' is already being captured; there isn't anything more to do. |
Eli Friedman | 72899c3 | 2012-01-07 04:59:52 +0000 | [diff] [blame] | 697 | break; |
| 698 | } |
Douglas Gregor | a1f2114 | 2012-02-01 17:04:21 +0000 | [diff] [blame] | 699 | |
Eli Friedman | b69b42c | 2012-01-11 02:36:31 +0000 | [diff] [blame] | 700 | if (CSI->ImpCaptureStyle == CapturingScopeInfo::ImpCap_LambdaByref || |
Douglas Gregor | 3ac109c | 2012-02-10 17:46:20 +0000 | [diff] [blame] | 701 | CSI->ImpCaptureStyle == CapturingScopeInfo::ImpCap_LambdaByval || |
Douglas Gregor | a1f2114 | 2012-02-01 17:04:21 +0000 | [diff] [blame] | 702 | CSI->ImpCaptureStyle == CapturingScopeInfo::ImpCap_Block || |
| 703 | Explicit) { |
| 704 | // This closure can capture 'this'; continue looking upwards. |
Eli Friedman | 72899c3 | 2012-01-07 04:59:52 +0000 | [diff] [blame] | 705 | NumClosures++; |
Douglas Gregor | a1f2114 | 2012-02-01 17:04:21 +0000 | [diff] [blame] | 706 | Explicit = false; |
Eli Friedman | 72899c3 | 2012-01-07 04:59:52 +0000 | [diff] [blame] | 707 | continue; |
| 708 | } |
Eli Friedman | b69b42c | 2012-01-11 02:36:31 +0000 | [diff] [blame] | 709 | // This context can't implicitly capture 'this'; fail out. |
Douglas Gregor | a1f2114 | 2012-02-01 17:04:21 +0000 | [diff] [blame] | 710 | Diag(Loc, diag::err_this_capture) << Explicit; |
Eli Friedman | 72899c3 | 2012-01-07 04:59:52 +0000 | [diff] [blame] | 711 | return; |
| 712 | } |
Eli Friedman | 72899c3 | 2012-01-07 04:59:52 +0000 | [diff] [blame] | 713 | break; |
| 714 | } |
| 715 | |
| 716 | // Mark that we're implicitly capturing 'this' in all the scopes we skipped. |
| 717 | // FIXME: We need to delay this marking in PotentiallyPotentiallyEvaluated |
| 718 | // contexts. |
| 719 | for (unsigned idx = FunctionScopes.size() - 1; |
| 720 | NumClosures; --idx, --NumClosures) { |
Eli Friedman | b69b42c | 2012-01-11 02:36:31 +0000 | [diff] [blame] | 721 | CapturingScopeInfo *CSI = cast<CapturingScopeInfo>(FunctionScopes[idx]); |
Eli Friedman | 668165a | 2012-02-11 02:51:16 +0000 | [diff] [blame] | 722 | Expr *ThisExpr = 0; |
Douglas Gregor | 999713e | 2012-02-18 09:37:24 +0000 | [diff] [blame] | 723 | QualType ThisTy = getCurrentThisType(); |
Eli Friedman | 668165a | 2012-02-11 02:51:16 +0000 | [diff] [blame] | 724 | if (LambdaScopeInfo *LSI = dyn_cast<LambdaScopeInfo>(CSI)) { |
| 725 | // For lambda expressions, build a field and an initializing expression. |
Eli Friedman | 668165a | 2012-02-11 02:51:16 +0000 | [diff] [blame] | 726 | CXXRecordDecl *Lambda = LSI->Lambda; |
| 727 | FieldDecl *Field |
| 728 | = FieldDecl::Create(Context, Lambda, Loc, Loc, 0, ThisTy, |
| 729 | Context.getTrivialTypeSourceInfo(ThisTy, Loc), |
Richard Smith | ca52330 | 2012-06-10 03:12:00 +0000 | [diff] [blame] | 730 | 0, false, ICIS_NoInit); |
Eli Friedman | 668165a | 2012-02-11 02:51:16 +0000 | [diff] [blame] | 731 | Field->setImplicit(true); |
| 732 | Field->setAccess(AS_private); |
| 733 | Lambda->addDecl(Field); |
| 734 | ThisExpr = new (Context) CXXThisExpr(Loc, ThisTy, /*isImplicit=*/true); |
| 735 | } |
Eli Friedman | b69b42c | 2012-01-11 02:36:31 +0000 | [diff] [blame] | 736 | bool isNested = NumClosures > 1; |
Douglas Gregor | 999713e | 2012-02-18 09:37:24 +0000 | [diff] [blame] | 737 | CSI->addThisCapture(isNested, Loc, ThisTy, ThisExpr); |
Eli Friedman | 72899c3 | 2012-01-07 04:59:52 +0000 | [diff] [blame] | 738 | } |
| 739 | } |
| 740 | |
Richard Smith | 7a614d8 | 2011-06-11 17:19:42 +0000 | [diff] [blame] | 741 | ExprResult Sema::ActOnCXXThis(SourceLocation Loc) { |
John McCall | 5808ce4 | 2011-02-03 08:15:49 +0000 | [diff] [blame] | 742 | /// C++ 9.3.2: In the body of a non-static member function, the keyword this |
| 743 | /// is a non-lvalue expression whose value is the address of the object for |
| 744 | /// which the function is called. |
| 745 | |
Douglas Gregor | 341350e | 2011-10-18 16:47:30 +0000 | [diff] [blame] | 746 | QualType ThisTy = getCurrentThisType(); |
Richard Smith | 7a614d8 | 2011-06-11 17:19:42 +0000 | [diff] [blame] | 747 | if (ThisTy.isNull()) return Diag(Loc, diag::err_invalid_this_use); |
John McCall | 5808ce4 | 2011-02-03 08:15:49 +0000 | [diff] [blame] | 748 | |
Eli Friedman | 72899c3 | 2012-01-07 04:59:52 +0000 | [diff] [blame] | 749 | CheckCXXThisCapture(Loc); |
Richard Smith | 7a614d8 | 2011-06-11 17:19:42 +0000 | [diff] [blame] | 750 | return Owned(new (Context) CXXThisExpr(Loc, ThisTy, /*isImplicit=*/false)); |
Argyrios Kyrtzidis | 0795232 | 2008-07-01 10:37:29 +0000 | [diff] [blame] | 751 | } |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 752 | |
Douglas Gregor | cefc3af | 2012-04-16 07:05:22 +0000 | [diff] [blame] | 753 | bool Sema::isThisOutsideMemberFunctionBody(QualType BaseType) { |
| 754 | // If we're outside the body of a member function, then we'll have a specified |
| 755 | // type for 'this'. |
| 756 | if (CXXThisTypeOverride.isNull()) |
| 757 | return false; |
| 758 | |
| 759 | // Determine whether we're looking into a class that's currently being |
| 760 | // defined. |
| 761 | CXXRecordDecl *Class = BaseType->getAsCXXRecordDecl(); |
| 762 | return Class && Class->isBeingDefined(); |
| 763 | } |
| 764 | |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 765 | ExprResult |
Douglas Gregor | ab6677e | 2010-09-08 00:15:04 +0000 | [diff] [blame] | 766 | Sema::ActOnCXXTypeConstructExpr(ParsedType TypeRep, |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 767 | SourceLocation LParenLoc, |
Sebastian Redl | f53597f | 2009-03-15 17:47:39 +0000 | [diff] [blame] | 768 | MultiExprArg exprs, |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 769 | SourceLocation RParenLoc) { |
Douglas Gregor | ae4c77d | 2010-02-05 19:11:37 +0000 | [diff] [blame] | 770 | if (!TypeRep) |
| 771 | return ExprError(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 772 | |
John McCall | 9d12503 | 2010-01-15 18:39:57 +0000 | [diff] [blame] | 773 | TypeSourceInfo *TInfo; |
| 774 | QualType Ty = GetTypeFromParser(TypeRep, &TInfo); |
| 775 | if (!TInfo) |
| 776 | TInfo = Context.getTrivialTypeSourceInfo(Ty, SourceLocation()); |
Douglas Gregor | ab6677e | 2010-09-08 00:15:04 +0000 | [diff] [blame] | 777 | |
| 778 | return BuildCXXTypeConstructExpr(TInfo, LParenLoc, exprs, RParenLoc); |
| 779 | } |
| 780 | |
| 781 | /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. |
| 782 | /// Can be interpreted either as function-style casting ("int(x)") |
| 783 | /// or class type construction ("ClassType(x,y,z)") |
| 784 | /// or creation of a value-initialized type ("int()"). |
| 785 | ExprResult |
| 786 | Sema::BuildCXXTypeConstructExpr(TypeSourceInfo *TInfo, |
| 787 | SourceLocation LParenLoc, |
| 788 | MultiExprArg exprs, |
| 789 | SourceLocation RParenLoc) { |
| 790 | QualType Ty = TInfo->getType(); |
Douglas Gregor | ab6677e | 2010-09-08 00:15:04 +0000 | [diff] [blame] | 791 | SourceLocation TyBeginLoc = TInfo->getTypeLoc().getBeginLoc(); |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 792 | |
Benjamin Kramer | 3b6bef9 | 2012-08-24 11:54:20 +0000 | [diff] [blame] | 793 | if (Ty->isDependentType() || CallExpr::hasAnyTypeDependentArguments(exprs)) { |
Douglas Gregor | ab6677e | 2010-09-08 00:15:04 +0000 | [diff] [blame] | 794 | return Owned(CXXUnresolvedConstructExpr::Create(Context, TInfo, |
Douglas Gregor | d81e6ca | 2009-05-20 18:46:25 +0000 | [diff] [blame] | 795 | LParenLoc, |
Benjamin Kramer | 3b6bef9 | 2012-08-24 11:54:20 +0000 | [diff] [blame] | 796 | exprs, |
Douglas Gregor | d81e6ca | 2009-05-20 18:46:25 +0000 | [diff] [blame] | 797 | RParenLoc)); |
Douglas Gregor | ba49817 | 2009-03-13 21:01:28 +0000 | [diff] [blame] | 798 | } |
| 799 | |
Benjamin Kramer | 3b6bef9 | 2012-08-24 11:54:20 +0000 | [diff] [blame] | 800 | unsigned NumExprs = exprs.size(); |
| 801 | Expr **Exprs = exprs.data(); |
| 802 | |
Sebastian Redl | 6dc00f6 | 2012-02-12 18:41:05 +0000 | [diff] [blame] | 803 | bool ListInitialization = LParenLoc.isInvalid(); |
| 804 | assert((!ListInitialization || (NumExprs == 1 && isa<InitListExpr>(Exprs[0]))) |
| 805 | && "List initialization must have initializer list as expression."); |
| 806 | SourceRange FullRange = SourceRange(TyBeginLoc, |
| 807 | ListInitialization ? Exprs[0]->getSourceRange().getEnd() : RParenLoc); |
| 808 | |
Douglas Gregor | 506ae41 | 2009-01-16 18:33:17 +0000 | [diff] [blame] | 809 | // C++ [expr.type.conv]p1: |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 810 | // If the expression list is a single expression, the type conversion |
| 811 | // expression is equivalent (in definedness, and if defined in meaning) to the |
| 812 | // corresponding cast expression. |
Sebastian Redl | 20ff0e2 | 2012-02-13 19:55:43 +0000 | [diff] [blame] | 813 | if (NumExprs == 1 && !ListInitialization) { |
John McCall | b45ae25 | 2011-10-05 07:41:44 +0000 | [diff] [blame] | 814 | Expr *Arg = Exprs[0]; |
John McCall | b45ae25 | 2011-10-05 07:41:44 +0000 | [diff] [blame] | 815 | return BuildCXXFunctionalCastExpr(TInfo, LParenLoc, Arg, RParenLoc); |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 816 | } |
| 817 | |
Eli Friedman | c60ccf5 | 2012-02-29 00:00:28 +0000 | [diff] [blame] | 818 | QualType ElemTy = Ty; |
| 819 | if (Ty->isArrayType()) { |
| 820 | if (!ListInitialization) |
| 821 | return ExprError(Diag(TyBeginLoc, |
| 822 | diag::err_value_init_for_array_type) << FullRange); |
| 823 | ElemTy = Context.getBaseElementType(Ty); |
| 824 | } |
| 825 | |
| 826 | if (!Ty->isVoidType() && |
| 827 | RequireCompleteType(TyBeginLoc, ElemTy, |
Douglas Gregor | d10099e | 2012-05-04 16:32:21 +0000 | [diff] [blame] | 828 | diag::err_invalid_incomplete_type_use, FullRange)) |
Eli Friedman | c60ccf5 | 2012-02-29 00:00:28 +0000 | [diff] [blame] | 829 | return ExprError(); |
| 830 | |
| 831 | if (RequireNonAbstractType(TyBeginLoc, Ty, |
| 832 | diag::err_allocation_of_abstract_type)) |
| 833 | return ExprError(); |
| 834 | |
Douglas Gregor | 19311e7 | 2010-09-08 21:40:08 +0000 | [diff] [blame] | 835 | InitializedEntity Entity = InitializedEntity::InitializeTemporary(TInfo); |
| 836 | InitializationKind Kind |
Sebastian Redl | 20ff0e2 | 2012-02-13 19:55:43 +0000 | [diff] [blame] | 837 | = NumExprs ? ListInitialization |
| 838 | ? InitializationKind::CreateDirectList(TyBeginLoc) |
| 839 | : InitializationKind::CreateDirect(TyBeginLoc, |
| 840 | LParenLoc, RParenLoc) |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 841 | : InitializationKind::CreateValue(TyBeginLoc, |
Douglas Gregor | 19311e7 | 2010-09-08 21:40:08 +0000 | [diff] [blame] | 842 | LParenLoc, RParenLoc); |
| 843 | InitializationSequence InitSeq(*this, Entity, Kind, Exprs, NumExprs); |
Benjamin Kramer | 3fe198b | 2012-08-23 21:35:17 +0000 | [diff] [blame] | 844 | ExprResult Result = InitSeq.Perform(*this, Entity, Kind, exprs); |
Sebastian Redl | f53597f | 2009-03-15 17:47:39 +0000 | [diff] [blame] | 845 | |
Sebastian Redl | 20ff0e2 | 2012-02-13 19:55:43 +0000 | [diff] [blame] | 846 | if (!Result.isInvalid() && ListInitialization && |
| 847 | isa<InitListExpr>(Result.get())) { |
| 848 | // If the list-initialization doesn't involve a constructor call, we'll get |
| 849 | // the initializer-list (with corrected type) back, but that's not what we |
| 850 | // want, since it will be treated as an initializer list in further |
| 851 | // processing. Explicitly insert a cast here. |
| 852 | InitListExpr *List = cast<InitListExpr>(Result.take()); |
| 853 | Result = Owned(CXXFunctionalCastExpr::Create(Context, List->getType(), |
| 854 | Expr::getValueKindForType(TInfo->getType()), |
| 855 | TInfo, TyBeginLoc, CK_NoOp, |
| 856 | List, /*Path=*/0, RParenLoc)); |
| 857 | } |
| 858 | |
Douglas Gregor | 19311e7 | 2010-09-08 21:40:08 +0000 | [diff] [blame] | 859 | // FIXME: Improve AST representation? |
Benjamin Kramer | 3fe198b | 2012-08-23 21:35:17 +0000 | [diff] [blame] | 860 | return Result; |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 861 | } |
Argyrios Kyrtzidis | 5921093 | 2008-09-10 02:17:11 +0000 | [diff] [blame] | 862 | |
John McCall | 6ec278d | 2011-01-27 09:37:56 +0000 | [diff] [blame] | 863 | /// doesUsualArrayDeleteWantSize - Answers whether the usual |
| 864 | /// operator delete[] for the given type has a size_t parameter. |
| 865 | static bool doesUsualArrayDeleteWantSize(Sema &S, SourceLocation loc, |
| 866 | QualType allocType) { |
| 867 | const RecordType *record = |
| 868 | allocType->getBaseElementTypeUnsafe()->getAs<RecordType>(); |
| 869 | if (!record) return false; |
| 870 | |
| 871 | // Try to find an operator delete[] in class scope. |
| 872 | |
| 873 | DeclarationName deleteName = |
| 874 | S.Context.DeclarationNames.getCXXOperatorName(OO_Array_Delete); |
| 875 | LookupResult ops(S, deleteName, loc, Sema::LookupOrdinaryName); |
| 876 | S.LookupQualifiedName(ops, record->getDecl()); |
| 877 | |
| 878 | // We're just doing this for information. |
| 879 | ops.suppressDiagnostics(); |
| 880 | |
| 881 | // Very likely: there's no operator delete[]. |
| 882 | if (ops.empty()) return false; |
| 883 | |
| 884 | // If it's ambiguous, it should be illegal to call operator delete[] |
| 885 | // on this thing, so it doesn't matter if we allocate extra space or not. |
| 886 | if (ops.isAmbiguous()) return false; |
| 887 | |
| 888 | LookupResult::Filter filter = ops.makeFilter(); |
| 889 | while (filter.hasNext()) { |
| 890 | NamedDecl *del = filter.next()->getUnderlyingDecl(); |
| 891 | |
| 892 | // C++0x [basic.stc.dynamic.deallocation]p2: |
| 893 | // A template instance is never a usual deallocation function, |
| 894 | // regardless of its signature. |
| 895 | if (isa<FunctionTemplateDecl>(del)) { |
| 896 | filter.erase(); |
| 897 | continue; |
| 898 | } |
| 899 | |
| 900 | // C++0x [basic.stc.dynamic.deallocation]p2: |
| 901 | // If class T does not declare [an operator delete[] with one |
| 902 | // parameter] but does declare a member deallocation function |
| 903 | // named operator delete[] with exactly two parameters, the |
| 904 | // second of which has type std::size_t, then this function |
| 905 | // is a usual deallocation function. |
| 906 | if (!cast<CXXMethodDecl>(del)->isUsualDeallocationFunction()) { |
| 907 | filter.erase(); |
| 908 | continue; |
| 909 | } |
| 910 | } |
| 911 | filter.done(); |
| 912 | |
| 913 | if (!ops.isSingleResult()) return false; |
| 914 | |
| 915 | const FunctionDecl *del = cast<FunctionDecl>(ops.getFoundDecl()); |
| 916 | return (del->getNumParams() == 2); |
| 917 | } |
Argyrios Kyrtzidis | 5921093 | 2008-09-10 02:17:11 +0000 | [diff] [blame] | 918 | |
Sebastian Redl | 6dc00f6 | 2012-02-12 18:41:05 +0000 | [diff] [blame] | 919 | /// \brief Parsed a C++ 'new' expression (C++ 5.3.4). |
James Dennett | ef2b5b3 | 2012-06-15 22:23:43 +0000 | [diff] [blame] | 920 | /// |
Sebastian Redl | 6dc00f6 | 2012-02-12 18:41:05 +0000 | [diff] [blame] | 921 | /// E.g.: |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 922 | /// @code new (memory) int[size][4] @endcode |
| 923 | /// or |
| 924 | /// @code ::new Foo(23, "hello") @endcode |
Sebastian Redl | 6dc00f6 | 2012-02-12 18:41:05 +0000 | [diff] [blame] | 925 | /// |
| 926 | /// \param StartLoc The first location of the expression. |
| 927 | /// \param UseGlobal True if 'new' was prefixed with '::'. |
| 928 | /// \param PlacementLParen Opening paren of the placement arguments. |
| 929 | /// \param PlacementArgs Placement new arguments. |
| 930 | /// \param PlacementRParen Closing paren of the placement arguments. |
| 931 | /// \param TypeIdParens If the type is in parens, the source range. |
| 932 | /// \param D The type to be allocated, as well as array dimensions. |
James Dennett | ef2b5b3 | 2012-06-15 22:23:43 +0000 | [diff] [blame] | 933 | /// \param Initializer The initializing expression or initializer-list, or null |
| 934 | /// if there is none. |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 935 | ExprResult |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 936 | Sema::ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, |
Sebastian Redl | f53597f | 2009-03-15 17:47:39 +0000 | [diff] [blame] | 937 | SourceLocation PlacementLParen, MultiExprArg PlacementArgs, |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 938 | SourceLocation PlacementRParen, SourceRange TypeIdParens, |
Sebastian Redl | 2aed8b8 | 2012-02-16 12:22:20 +0000 | [diff] [blame] | 939 | Declarator &D, Expr *Initializer) { |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 940 | bool TypeContainsAuto = D.getDeclSpec().getTypeSpecType() == DeclSpec::TST_auto; |
| 941 | |
Sebastian Redl | cee63fb | 2008-12-02 14:43:59 +0000 | [diff] [blame] | 942 | Expr *ArraySize = 0; |
Sebastian Redl | cee63fb | 2008-12-02 14:43:59 +0000 | [diff] [blame] | 943 | // If the specified type is an array, unwrap it and save the expression. |
| 944 | if (D.getNumTypeObjects() > 0 && |
| 945 | D.getTypeObject(0).Kind == DeclaratorChunk::Array) { |
James Dennett | ef2b5b3 | 2012-06-15 22:23:43 +0000 | [diff] [blame] | 946 | DeclaratorChunk &Chunk = D.getTypeObject(0); |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 947 | if (TypeContainsAuto) |
| 948 | return ExprError(Diag(Chunk.Loc, diag::err_new_array_of_auto) |
| 949 | << D.getSourceRange()); |
Sebastian Redl | cee63fb | 2008-12-02 14:43:59 +0000 | [diff] [blame] | 950 | if (Chunk.Arr.hasStatic) |
Sebastian Redl | f53597f | 2009-03-15 17:47:39 +0000 | [diff] [blame] | 951 | return ExprError(Diag(Chunk.Loc, diag::err_static_illegal_in_new) |
| 952 | << D.getSourceRange()); |
Sebastian Redl | cee63fb | 2008-12-02 14:43:59 +0000 | [diff] [blame] | 953 | if (!Chunk.Arr.NumElts) |
Sebastian Redl | f53597f | 2009-03-15 17:47:39 +0000 | [diff] [blame] | 954 | return ExprError(Diag(Chunk.Loc, diag::err_array_new_needs_size) |
| 955 | << D.getSourceRange()); |
Sebastian Redl | 8ce35b0 | 2009-10-25 21:45:37 +0000 | [diff] [blame] | 956 | |
Sebastian Redl | cee63fb | 2008-12-02 14:43:59 +0000 | [diff] [blame] | 957 | ArraySize = static_cast<Expr*>(Chunk.Arr.NumElts); |
Sebastian Redl | 8ce35b0 | 2009-10-25 21:45:37 +0000 | [diff] [blame] | 958 | D.DropFirstTypeObject(); |
Sebastian Redl | cee63fb | 2008-12-02 14:43:59 +0000 | [diff] [blame] | 959 | } |
| 960 | |
Douglas Gregor | 043cad2 | 2009-09-11 00:18:58 +0000 | [diff] [blame] | 961 | // Every dimension shall be of constant size. |
Sebastian Redl | 8ce35b0 | 2009-10-25 21:45:37 +0000 | [diff] [blame] | 962 | if (ArraySize) { |
| 963 | for (unsigned I = 0, N = D.getNumTypeObjects(); I < N; ++I) { |
Douglas Gregor | 043cad2 | 2009-09-11 00:18:58 +0000 | [diff] [blame] | 964 | if (D.getTypeObject(I).Kind != DeclaratorChunk::Array) |
| 965 | break; |
| 966 | |
| 967 | DeclaratorChunk::ArrayTypeInfo &Array = D.getTypeObject(I).Arr; |
| 968 | if (Expr *NumElts = (Expr *)Array.NumElts) { |
Richard Smith | 282e7e6 | 2012-02-04 09:53:13 +0000 | [diff] [blame] | 969 | if (!NumElts->isTypeDependent() && !NumElts->isValueDependent()) { |
Douglas Gregor | ab41fe9 | 2012-05-04 22:38:52 +0000 | [diff] [blame] | 970 | Array.NumElts |
| 971 | = VerifyIntegerConstantExpression(NumElts, 0, |
| 972 | diag::err_new_array_nonconst) |
| 973 | .take(); |
Richard Smith | 282e7e6 | 2012-02-04 09:53:13 +0000 | [diff] [blame] | 974 | if (!Array.NumElts) |
| 975 | return ExprError(); |
Douglas Gregor | 043cad2 | 2009-09-11 00:18:58 +0000 | [diff] [blame] | 976 | } |
| 977 | } |
| 978 | } |
| 979 | } |
Sebastian Redl | 8ce35b0 | 2009-10-25 21:45:37 +0000 | [diff] [blame] | 980 | |
Argyrios Kyrtzidis | 0b8c98f | 2011-06-28 03:01:23 +0000 | [diff] [blame] | 981 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, /*Scope=*/0); |
John McCall | bf1a028 | 2010-06-04 23:28:52 +0000 | [diff] [blame] | 982 | QualType AllocType = TInfo->getType(); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 983 | if (D.isInvalidType()) |
Sebastian Redl | f53597f | 2009-03-15 17:47:39 +0000 | [diff] [blame] | 984 | return ExprError(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 985 | |
Sebastian Redl | 2aed8b8 | 2012-02-16 12:22:20 +0000 | [diff] [blame] | 986 | SourceRange DirectInitRange; |
| 987 | if (ParenListExpr *List = dyn_cast_or_null<ParenListExpr>(Initializer)) |
| 988 | DirectInitRange = List->getSourceRange(); |
| 989 | |
David Blaikie | 5305641 | 2012-11-07 00:12:38 +0000 | [diff] [blame] | 990 | return BuildCXXNew(SourceRange(StartLoc, D.getLocEnd()), UseGlobal, |
Douglas Gregor | 3433cf7 | 2009-05-21 00:00:09 +0000 | [diff] [blame] | 991 | PlacementLParen, |
Benjamin Kramer | 3fe198b | 2012-08-23 21:35:17 +0000 | [diff] [blame] | 992 | PlacementArgs, |
Douglas Gregor | 3433cf7 | 2009-05-21 00:00:09 +0000 | [diff] [blame] | 993 | PlacementRParen, |
Douglas Gregor | 4bd4031 | 2010-07-13 15:54:32 +0000 | [diff] [blame] | 994 | TypeIdParens, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 995 | AllocType, |
Douglas Gregor | 1bb2a93 | 2010-09-07 21:49:58 +0000 | [diff] [blame] | 996 | TInfo, |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 997 | ArraySize, |
Sebastian Redl | 2aed8b8 | 2012-02-16 12:22:20 +0000 | [diff] [blame] | 998 | DirectInitRange, |
| 999 | Initializer, |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 1000 | TypeContainsAuto); |
Douglas Gregor | 3433cf7 | 2009-05-21 00:00:09 +0000 | [diff] [blame] | 1001 | } |
| 1002 | |
Sebastian Redl | bd45d25 | 2012-02-16 12:59:47 +0000 | [diff] [blame] | 1003 | static bool isLegalArrayNewInitializer(CXXNewExpr::InitializationStyle Style, |
| 1004 | Expr *Init) { |
Sebastian Redl | 2aed8b8 | 2012-02-16 12:22:20 +0000 | [diff] [blame] | 1005 | if (!Init) |
| 1006 | return true; |
Sebastian Redl | 1f27805 | 2012-02-17 08:42:32 +0000 | [diff] [blame] | 1007 | if (ParenListExpr *PLE = dyn_cast<ParenListExpr>(Init)) |
| 1008 | return PLE->getNumExprs() == 0; |
Sebastian Redl | 2aed8b8 | 2012-02-16 12:22:20 +0000 | [diff] [blame] | 1009 | if (isa<ImplicitValueInitExpr>(Init)) |
| 1010 | return true; |
| 1011 | else if (CXXConstructExpr *CCE = dyn_cast<CXXConstructExpr>(Init)) |
| 1012 | return !CCE->isListInitialization() && |
| 1013 | CCE->getConstructor()->isDefaultConstructor(); |
Sebastian Redl | bd45d25 | 2012-02-16 12:59:47 +0000 | [diff] [blame] | 1014 | else if (Style == CXXNewExpr::ListInit) { |
| 1015 | assert(isa<InitListExpr>(Init) && |
| 1016 | "Shouldn't create list CXXConstructExprs for arrays."); |
| 1017 | return true; |
| 1018 | } |
Sebastian Redl | 2aed8b8 | 2012-02-16 12:22:20 +0000 | [diff] [blame] | 1019 | return false; |
| 1020 | } |
| 1021 | |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1022 | ExprResult |
David Blaikie | 5305641 | 2012-11-07 00:12:38 +0000 | [diff] [blame] | 1023 | Sema::BuildCXXNew(SourceRange Range, bool UseGlobal, |
Douglas Gregor | 3433cf7 | 2009-05-21 00:00:09 +0000 | [diff] [blame] | 1024 | SourceLocation PlacementLParen, |
| 1025 | MultiExprArg PlacementArgs, |
| 1026 | SourceLocation PlacementRParen, |
Douglas Gregor | 4bd4031 | 2010-07-13 15:54:32 +0000 | [diff] [blame] | 1027 | SourceRange TypeIdParens, |
Douglas Gregor | 3433cf7 | 2009-05-21 00:00:09 +0000 | [diff] [blame] | 1028 | QualType AllocType, |
Douglas Gregor | 1bb2a93 | 2010-09-07 21:49:58 +0000 | [diff] [blame] | 1029 | TypeSourceInfo *AllocTypeInfo, |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1030 | Expr *ArraySize, |
Sebastian Redl | 2aed8b8 | 2012-02-16 12:22:20 +0000 | [diff] [blame] | 1031 | SourceRange DirectInitRange, |
| 1032 | Expr *Initializer, |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 1033 | bool TypeMayContainAuto) { |
Douglas Gregor | 1bb2a93 | 2010-09-07 21:49:58 +0000 | [diff] [blame] | 1034 | SourceRange TypeRange = AllocTypeInfo->getTypeLoc().getSourceRange(); |
David Blaikie | 5305641 | 2012-11-07 00:12:38 +0000 | [diff] [blame] | 1035 | SourceLocation StartLoc = Range.getBegin(); |
Sebastian Redl | cee63fb | 2008-12-02 14:43:59 +0000 | [diff] [blame] | 1036 | |
Sebastian Redl | 2aed8b8 | 2012-02-16 12:22:20 +0000 | [diff] [blame] | 1037 | CXXNewExpr::InitializationStyle initStyle; |
| 1038 | if (DirectInitRange.isValid()) { |
| 1039 | assert(Initializer && "Have parens but no initializer."); |
| 1040 | initStyle = CXXNewExpr::CallInit; |
| 1041 | } else if (Initializer && isa<InitListExpr>(Initializer)) |
| 1042 | initStyle = CXXNewExpr::ListInit; |
| 1043 | else { |
| 1044 | assert((!Initializer || isa<ImplicitValueInitExpr>(Initializer) || |
| 1045 | isa<CXXConstructExpr>(Initializer)) && |
| 1046 | "Initializer expression that cannot have been implicitly created."); |
| 1047 | initStyle = CXXNewExpr::NoInit; |
| 1048 | } |
| 1049 | |
| 1050 | Expr **Inits = &Initializer; |
| 1051 | unsigned NumInits = Initializer ? 1 : 0; |
Richard Smith | 73ed67c | 2012-11-26 08:32:48 +0000 | [diff] [blame] | 1052 | if (ParenListExpr *List = dyn_cast_or_null<ParenListExpr>(Initializer)) { |
| 1053 | assert(initStyle == CXXNewExpr::CallInit && "paren init for non-call init"); |
| 1054 | Inits = List->getExprs(); |
| 1055 | NumInits = List->getNumExprs(); |
Sebastian Redl | 2aed8b8 | 2012-02-16 12:22:20 +0000 | [diff] [blame] | 1056 | } |
| 1057 | |
Richard Smith | 73ed67c | 2012-11-26 08:32:48 +0000 | [diff] [blame] | 1058 | // Determine whether we've already built the initializer. |
| 1059 | bool HaveCompleteInit = false; |
| 1060 | if (Initializer && isa<CXXConstructExpr>(Initializer) && |
| 1061 | !isa<CXXTemporaryObjectExpr>(Initializer)) |
| 1062 | HaveCompleteInit = true; |
| 1063 | else if (Initializer && isa<ImplicitValueInitExpr>(Initializer)) |
| 1064 | HaveCompleteInit = true; |
| 1065 | |
Richard Smith | 8ad6c86 | 2012-07-08 04:13:07 +0000 | [diff] [blame] | 1066 | // C++11 [decl.spec.auto]p6. Deduce the type which 'auto' stands in for. |
| 1067 | AutoType *AT = 0; |
| 1068 | if (TypeMayContainAuto && |
| 1069 | (AT = AllocType->getContainedAutoType()) && !AT->isDeduced()) { |
Sebastian Redl | 2aed8b8 | 2012-02-16 12:22:20 +0000 | [diff] [blame] | 1070 | if (initStyle == CXXNewExpr::NoInit || NumInits == 0) |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 1071 | return ExprError(Diag(StartLoc, diag::err_auto_new_requires_ctor_arg) |
| 1072 | << AllocType << TypeRange); |
Sebastian Redl | 2aed8b8 | 2012-02-16 12:22:20 +0000 | [diff] [blame] | 1073 | if (initStyle == CXXNewExpr::ListInit) |
Daniel Dunbar | 96a0014 | 2012-03-09 18:35:03 +0000 | [diff] [blame] | 1074 | return ExprError(Diag(Inits[0]->getLocStart(), |
Sebastian Redl | 2aed8b8 | 2012-02-16 12:22:20 +0000 | [diff] [blame] | 1075 | diag::err_auto_new_requires_parens) |
| 1076 | << AllocType << TypeRange); |
| 1077 | if (NumInits > 1) { |
| 1078 | Expr *FirstBad = Inits[1]; |
Daniel Dunbar | 96a0014 | 2012-03-09 18:35:03 +0000 | [diff] [blame] | 1079 | return ExprError(Diag(FirstBad->getLocStart(), |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 1080 | diag::err_auto_new_ctor_multiple_expressions) |
| 1081 | << AllocType << TypeRange); |
| 1082 | } |
Sebastian Redl | 2aed8b8 | 2012-02-16 12:22:20 +0000 | [diff] [blame] | 1083 | Expr *Deduce = Inits[0]; |
Richard Smith | a085da8 | 2011-03-17 16:11:59 +0000 | [diff] [blame] | 1084 | TypeSourceInfo *DeducedType = 0; |
Richard Smith | 8ad6c86 | 2012-07-08 04:13:07 +0000 | [diff] [blame] | 1085 | if (DeduceAutoType(AllocTypeInfo, Deduce, DeducedType) == DAR_Failed) |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 1086 | return ExprError(Diag(StartLoc, diag::err_auto_new_deduction_failure) |
Sebastian Redl | 6dc00f6 | 2012-02-12 18:41:05 +0000 | [diff] [blame] | 1087 | << AllocType << Deduce->getType() |
| 1088 | << TypeRange << Deduce->getSourceRange()); |
Richard Smith | a085da8 | 2011-03-17 16:11:59 +0000 | [diff] [blame] | 1089 | if (!DeducedType) |
| 1090 | return ExprError(); |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 1091 | |
Richard Smith | a085da8 | 2011-03-17 16:11:59 +0000 | [diff] [blame] | 1092 | AllocTypeInfo = DeducedType; |
| 1093 | AllocType = AllocTypeInfo->getType(); |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 1094 | } |
Sebastian Redl | 6dc00f6 | 2012-02-12 18:41:05 +0000 | [diff] [blame] | 1095 | |
Douglas Gregor | 3caf04e | 2010-05-16 16:01:03 +0000 | [diff] [blame] | 1096 | // Per C++0x [expr.new]p5, the type being constructed may be a |
| 1097 | // typedef of an array type. |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1098 | if (!ArraySize) { |
Douglas Gregor | 3caf04e | 2010-05-16 16:01:03 +0000 | [diff] [blame] | 1099 | if (const ConstantArrayType *Array |
| 1100 | = Context.getAsConstantArrayType(AllocType)) { |
Argyrios Kyrtzidis | 9996a7f | 2010-08-28 09:06:06 +0000 | [diff] [blame] | 1101 | ArraySize = IntegerLiteral::Create(Context, Array->getSize(), |
| 1102 | Context.getSizeType(), |
| 1103 | TypeRange.getEnd()); |
Douglas Gregor | 3caf04e | 2010-05-16 16:01:03 +0000 | [diff] [blame] | 1104 | AllocType = Array->getElementType(); |
| 1105 | } |
| 1106 | } |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 1107 | |
Douglas Gregor | a075076 | 2010-10-06 16:00:31 +0000 | [diff] [blame] | 1108 | if (CheckAllocatedType(AllocType, TypeRange.getBegin(), TypeRange)) |
| 1109 | return ExprError(); |
| 1110 | |
Sebastian Redl | 2aed8b8 | 2012-02-16 12:22:20 +0000 | [diff] [blame] | 1111 | if (initStyle == CXXNewExpr::ListInit && isStdInitializerList(AllocType, 0)) { |
Sebastian Redl | 6dc00f6 | 2012-02-12 18:41:05 +0000 | [diff] [blame] | 1112 | Diag(AllocTypeInfo->getTypeLoc().getBeginLoc(), |
| 1113 | diag::warn_dangling_std_initializer_list) |
Sebastian Redl | 772291a | 2012-02-19 16:31:05 +0000 | [diff] [blame] | 1114 | << /*at end of FE*/0 << Inits[0]->getSourceRange(); |
Sebastian Redl | 6dc00f6 | 2012-02-12 18:41:05 +0000 | [diff] [blame] | 1115 | } |
| 1116 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1117 | // In ARC, infer 'retaining' for the allocated |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 1118 | if (getLangOpts().ObjCAutoRefCount && |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1119 | AllocType.getObjCLifetime() == Qualifiers::OCL_None && |
| 1120 | AllocType->isObjCLifetimeType()) { |
| 1121 | AllocType = Context.getLifetimeQualifiedType(AllocType, |
| 1122 | AllocType->getObjCARCImplicitLifetime()); |
| 1123 | } |
Sebastian Redl | cee63fb | 2008-12-02 14:43:59 +0000 | [diff] [blame] | 1124 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1125 | QualType ResultType = Context.getPointerType(AllocType); |
| 1126 | |
Richard Smith | f39aec1 | 2012-02-04 07:07:42 +0000 | [diff] [blame] | 1127 | // C++98 5.3.4p6: "The expression in a direct-new-declarator shall have |
| 1128 | // integral or enumeration type with a non-negative value." |
| 1129 | // C++11 [expr.new]p6: The expression [...] shall be of integral or unscoped |
| 1130 | // enumeration type, or a class type for which a single non-explicit |
| 1131 | // conversion function to integral or unscoped enumeration type exists. |
Sebastian Redl | 2850784 | 2009-02-26 14:39:58 +0000 | [diff] [blame] | 1132 | if (ArraySize && !ArraySize->isTypeDependent()) { |
Douglas Gregor | ab41fe9 | 2012-05-04 22:38:52 +0000 | [diff] [blame] | 1133 | class SizeConvertDiagnoser : public ICEConvertDiagnoser { |
| 1134 | Expr *ArraySize; |
| 1135 | |
| 1136 | public: |
| 1137 | SizeConvertDiagnoser(Expr *ArraySize) |
| 1138 | : ICEConvertDiagnoser(false, false), ArraySize(ArraySize) { } |
| 1139 | |
| 1140 | virtual DiagnosticBuilder diagnoseNotInt(Sema &S, SourceLocation Loc, |
| 1141 | QualType T) { |
| 1142 | return S.Diag(Loc, diag::err_array_size_not_integral) |
| 1143 | << S.getLangOpts().CPlusPlus0x << T; |
| 1144 | } |
| 1145 | |
| 1146 | virtual DiagnosticBuilder diagnoseIncomplete(Sema &S, SourceLocation Loc, |
| 1147 | QualType T) { |
| 1148 | return S.Diag(Loc, diag::err_array_size_incomplete_type) |
| 1149 | << T << ArraySize->getSourceRange(); |
| 1150 | } |
| 1151 | |
| 1152 | virtual DiagnosticBuilder diagnoseExplicitConv(Sema &S, |
| 1153 | SourceLocation Loc, |
| 1154 | QualType T, |
| 1155 | QualType ConvTy) { |
| 1156 | return S.Diag(Loc, diag::err_array_size_explicit_conversion) << T << ConvTy; |
| 1157 | } |
| 1158 | |
| 1159 | virtual DiagnosticBuilder noteExplicitConv(Sema &S, |
| 1160 | CXXConversionDecl *Conv, |
| 1161 | QualType ConvTy) { |
| 1162 | return S.Diag(Conv->getLocation(), diag::note_array_size_conversion) |
| 1163 | << ConvTy->isEnumeralType() << ConvTy; |
| 1164 | } |
| 1165 | |
| 1166 | virtual DiagnosticBuilder diagnoseAmbiguous(Sema &S, SourceLocation Loc, |
| 1167 | QualType T) { |
| 1168 | return S.Diag(Loc, diag::err_array_size_ambiguous_conversion) << T; |
| 1169 | } |
| 1170 | |
| 1171 | virtual DiagnosticBuilder noteAmbiguous(Sema &S, CXXConversionDecl *Conv, |
| 1172 | QualType ConvTy) { |
| 1173 | return S.Diag(Conv->getLocation(), diag::note_array_size_conversion) |
| 1174 | << ConvTy->isEnumeralType() << ConvTy; |
| 1175 | } |
| 1176 | |
| 1177 | virtual DiagnosticBuilder diagnoseConversion(Sema &S, SourceLocation Loc, |
| 1178 | QualType T, |
| 1179 | QualType ConvTy) { |
| 1180 | return S.Diag(Loc, |
| 1181 | S.getLangOpts().CPlusPlus0x |
| 1182 | ? diag::warn_cxx98_compat_array_size_conversion |
| 1183 | : diag::ext_array_size_conversion) |
| 1184 | << T << ConvTy->isEnumeralType() << ConvTy; |
| 1185 | } |
| 1186 | } SizeDiagnoser(ArraySize); |
| 1187 | |
| 1188 | ExprResult ConvertedSize |
| 1189 | = ConvertToIntegralOrEnumerationType(StartLoc, ArraySize, SizeDiagnoser, |
| 1190 | /*AllowScopedEnumerations*/ false); |
Douglas Gregor | 6bc574d | 2010-06-30 00:20:43 +0000 | [diff] [blame] | 1191 | if (ConvertedSize.isInvalid()) |
| 1192 | return ExprError(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1193 | |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1194 | ArraySize = ConvertedSize.take(); |
John McCall | 806054d | 2012-01-11 00:14:46 +0000 | [diff] [blame] | 1195 | QualType SizeType = ArraySize->getType(); |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 1196 | if (!SizeType->isIntegralOrUnscopedEnumerationType()) |
Douglas Gregor | 6bc574d | 2010-06-30 00:20:43 +0000 | [diff] [blame] | 1197 | return ExprError(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1198 | |
Richard Smith | 0b458fd | 2012-02-04 05:35:53 +0000 | [diff] [blame] | 1199 | // C++98 [expr.new]p7: |
| 1200 | // The expression in a direct-new-declarator shall have integral type |
| 1201 | // with a non-negative value. |
| 1202 | // |
| 1203 | // Let's see if this is a constant < 0. If so, we reject it out of |
| 1204 | // hand. Otherwise, if it's not a constant, we must have an unparenthesized |
| 1205 | // array type. |
| 1206 | // |
| 1207 | // Note: such a construct has well-defined semantics in C++11: it throws |
| 1208 | // std::bad_array_new_length. |
Sebastian Redl | 2850784 | 2009-02-26 14:39:58 +0000 | [diff] [blame] | 1209 | if (!ArraySize->isValueDependent()) { |
| 1210 | llvm::APSInt Value; |
Richard Smith | 282e7e6 | 2012-02-04 09:53:13 +0000 | [diff] [blame] | 1211 | // We've already performed any required implicit conversion to integer or |
| 1212 | // unscoped enumeration type. |
Richard Smith | 0b458fd | 2012-02-04 05:35:53 +0000 | [diff] [blame] | 1213 | if (ArraySize->isIntegerConstantExpr(Value, Context)) { |
Sebastian Redl | 2850784 | 2009-02-26 14:39:58 +0000 | [diff] [blame] | 1214 | if (Value < llvm::APSInt( |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1215 | llvm::APInt::getNullValue(Value.getBitWidth()), |
Richard Smith | 0b458fd | 2012-02-04 05:35:53 +0000 | [diff] [blame] | 1216 | Value.isUnsigned())) { |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 1217 | if (getLangOpts().CPlusPlus0x) |
Daniel Dunbar | 96a0014 | 2012-03-09 18:35:03 +0000 | [diff] [blame] | 1218 | Diag(ArraySize->getLocStart(), |
Richard Smith | 0b458fd | 2012-02-04 05:35:53 +0000 | [diff] [blame] | 1219 | diag::warn_typecheck_negative_array_new_size) |
Douglas Gregor | 2767ce2 | 2010-08-18 00:39:00 +0000 | [diff] [blame] | 1220 | << ArraySize->getSourceRange(); |
Richard Smith | 0b458fd | 2012-02-04 05:35:53 +0000 | [diff] [blame] | 1221 | else |
Daniel Dunbar | 96a0014 | 2012-03-09 18:35:03 +0000 | [diff] [blame] | 1222 | return ExprError(Diag(ArraySize->getLocStart(), |
Richard Smith | 0b458fd | 2012-02-04 05:35:53 +0000 | [diff] [blame] | 1223 | diag::err_typecheck_negative_array_size) |
| 1224 | << ArraySize->getSourceRange()); |
| 1225 | } else if (!AllocType->isDependentType()) { |
| 1226 | unsigned ActiveSizeBits = |
| 1227 | ConstantArrayType::getNumAddressingBits(Context, AllocType, Value); |
| 1228 | if (ActiveSizeBits > ConstantArrayType::getMaxSizeBits(Context)) { |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 1229 | if (getLangOpts().CPlusPlus0x) |
Daniel Dunbar | 96a0014 | 2012-03-09 18:35:03 +0000 | [diff] [blame] | 1230 | Diag(ArraySize->getLocStart(), |
Richard Smith | 0b458fd | 2012-02-04 05:35:53 +0000 | [diff] [blame] | 1231 | diag::warn_array_new_too_large) |
| 1232 | << Value.toString(10) |
| 1233 | << ArraySize->getSourceRange(); |
| 1234 | else |
Daniel Dunbar | 96a0014 | 2012-03-09 18:35:03 +0000 | [diff] [blame] | 1235 | return ExprError(Diag(ArraySize->getLocStart(), |
Richard Smith | 0b458fd | 2012-02-04 05:35:53 +0000 | [diff] [blame] | 1236 | diag::err_array_too_large) |
| 1237 | << Value.toString(10) |
| 1238 | << ArraySize->getSourceRange()); |
Douglas Gregor | 2767ce2 | 2010-08-18 00:39:00 +0000 | [diff] [blame] | 1239 | } |
| 1240 | } |
Douglas Gregor | 4bd4031 | 2010-07-13 15:54:32 +0000 | [diff] [blame] | 1241 | } else if (TypeIdParens.isValid()) { |
| 1242 | // Can't have dynamic array size when the type-id is in parentheses. |
| 1243 | Diag(ArraySize->getLocStart(), diag::ext_new_paren_array_nonconst) |
| 1244 | << ArraySize->getSourceRange() |
| 1245 | << FixItHint::CreateRemoval(TypeIdParens.getBegin()) |
| 1246 | << FixItHint::CreateRemoval(TypeIdParens.getEnd()); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1247 | |
Douglas Gregor | 4bd4031 | 2010-07-13 15:54:32 +0000 | [diff] [blame] | 1248 | TypeIdParens = SourceRange(); |
Sebastian Redl | 2850784 | 2009-02-26 14:39:58 +0000 | [diff] [blame] | 1249 | } |
Sebastian Redl | cee63fb | 2008-12-02 14:43:59 +0000 | [diff] [blame] | 1250 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1251 | |
John McCall | 7d16627 | 2011-05-15 07:14:44 +0000 | [diff] [blame] | 1252 | // Note that we do *not* convert the argument in any way. It can |
| 1253 | // be signed, larger than size_t, whatever. |
Sebastian Redl | cee63fb | 2008-12-02 14:43:59 +0000 | [diff] [blame] | 1254 | } |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 1255 | |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 1256 | FunctionDecl *OperatorNew = 0; |
| 1257 | FunctionDecl *OperatorDelete = 0; |
Benjamin Kramer | 5354e77 | 2012-08-23 23:38:35 +0000 | [diff] [blame] | 1258 | Expr **PlaceArgs = PlacementArgs.data(); |
Sebastian Redl | f53597f | 2009-03-15 17:47:39 +0000 | [diff] [blame] | 1259 | unsigned NumPlaceArgs = PlacementArgs.size(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1260 | |
Sebastian Redl | 2850784 | 2009-02-26 14:39:58 +0000 | [diff] [blame] | 1261 | if (!AllocType->isDependentType() && |
Ahmed Charles | 13a140c | 2012-02-25 11:00:22 +0000 | [diff] [blame] | 1262 | !Expr::hasAnyTypeDependentArguments( |
| 1263 | llvm::makeArrayRef(PlaceArgs, NumPlaceArgs)) && |
Sebastian Redl | 2850784 | 2009-02-26 14:39:58 +0000 | [diff] [blame] | 1264 | FindAllocationFunctions(StartLoc, |
Sebastian Redl | 00e68e2 | 2009-02-09 18:24:27 +0000 | [diff] [blame] | 1265 | SourceRange(PlacementLParen, PlacementRParen), |
| 1266 | UseGlobal, AllocType, ArraySize, PlaceArgs, |
| 1267 | NumPlaceArgs, OperatorNew, OperatorDelete)) |
Sebastian Redl | f53597f | 2009-03-15 17:47:39 +0000 | [diff] [blame] | 1268 | return ExprError(); |
John McCall | 6ec278d | 2011-01-27 09:37:56 +0000 | [diff] [blame] | 1269 | |
| 1270 | // If this is an array allocation, compute whether the usual array |
| 1271 | // deallocation function for the type has a size_t parameter. |
| 1272 | bool UsualArrayDeleteWantsSize = false; |
| 1273 | if (ArraySize && !AllocType->isDependentType()) |
| 1274 | UsualArrayDeleteWantsSize |
| 1275 | = doesUsualArrayDeleteWantSize(*this, StartLoc, AllocType); |
| 1276 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1277 | SmallVector<Expr *, 8> AllPlaceArgs; |
Fariborz Jahanian | 498429f | 2009-11-19 18:39:40 +0000 | [diff] [blame] | 1278 | if (OperatorNew) { |
| 1279 | // Add default arguments, if any. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1280 | const FunctionProtoType *Proto = |
Fariborz Jahanian | 498429f | 2009-11-19 18:39:40 +0000 | [diff] [blame] | 1281 | OperatorNew->getType()->getAs<FunctionProtoType>(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1282 | VariadicCallType CallType = |
Fariborz Jahanian | 4cd1c70 | 2009-11-24 19:27:49 +0000 | [diff] [blame] | 1283 | Proto->isVariadic() ? VariadicFunction : VariadicDoesNotApply; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1284 | |
Anders Carlsson | 28e9483 | 2010-05-03 02:07:56 +0000 | [diff] [blame] | 1285 | if (GatherArgumentsForCall(PlacementLParen, OperatorNew, |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1286 | Proto, 1, PlaceArgs, NumPlaceArgs, |
Anders Carlsson | 28e9483 | 2010-05-03 02:07:56 +0000 | [diff] [blame] | 1287 | AllPlaceArgs, CallType)) |
Fariborz Jahanian | 048f52a | 2009-11-24 18:29:37 +0000 | [diff] [blame] | 1288 | return ExprError(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1289 | |
Fariborz Jahanian | 498429f | 2009-11-19 18:39:40 +0000 | [diff] [blame] | 1290 | NumPlaceArgs = AllPlaceArgs.size(); |
| 1291 | if (NumPlaceArgs > 0) |
| 1292 | PlaceArgs = &AllPlaceArgs[0]; |
Eli Friedman | e61eb04 | 2012-02-18 04:48:30 +0000 | [diff] [blame] | 1293 | |
| 1294 | DiagnoseSentinelCalls(OperatorNew, PlacementLParen, |
| 1295 | PlaceArgs, NumPlaceArgs); |
| 1296 | |
| 1297 | // FIXME: Missing call to CheckFunctionCall or equivalent |
Fariborz Jahanian | 498429f | 2009-11-19 18:39:40 +0000 | [diff] [blame] | 1298 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1299 | |
Nick Lewycky | fca84b2 | 2012-01-24 21:15:41 +0000 | [diff] [blame] | 1300 | // Warn if the type is over-aligned and is being allocated by global operator |
| 1301 | // new. |
Nick Lewycky | 507a8a3 | 2012-02-04 03:30:14 +0000 | [diff] [blame] | 1302 | if (NumPlaceArgs == 0 && OperatorNew && |
Nick Lewycky | fca84b2 | 2012-01-24 21:15:41 +0000 | [diff] [blame] | 1303 | (OperatorNew->isImplicit() || |
| 1304 | getSourceManager().isInSystemHeader(OperatorNew->getLocStart()))) { |
| 1305 | if (unsigned Align = Context.getPreferredTypeAlign(AllocType.getTypePtr())){ |
| 1306 | unsigned SuitableAlign = Context.getTargetInfo().getSuitableAlign(); |
| 1307 | if (Align > SuitableAlign) |
| 1308 | Diag(StartLoc, diag::warn_overaligned_type) |
| 1309 | << AllocType |
| 1310 | << unsigned(Align / Context.getCharWidth()) |
| 1311 | << unsigned(SuitableAlign / Context.getCharWidth()); |
| 1312 | } |
| 1313 | } |
| 1314 | |
Sebastian Redl | bd45d25 | 2012-02-16 12:59:47 +0000 | [diff] [blame] | 1315 | QualType InitType = AllocType; |
Sebastian Redl | 2aed8b8 | 2012-02-16 12:22:20 +0000 | [diff] [blame] | 1316 | // Array 'new' can't have any initializers except empty parentheses. |
Sebastian Redl | bd45d25 | 2012-02-16 12:59:47 +0000 | [diff] [blame] | 1317 | // Initializer lists are also allowed, in C++11. Rely on the parser for the |
| 1318 | // dialect distinction. |
| 1319 | if (ResultType->isArrayType() || ArraySize) { |
| 1320 | if (!isLegalArrayNewInitializer(initStyle, Initializer)) { |
| 1321 | SourceRange InitRange(Inits[0]->getLocStart(), |
| 1322 | Inits[NumInits - 1]->getLocEnd()); |
| 1323 | Diag(StartLoc, diag::err_new_array_init_args) << InitRange; |
| 1324 | return ExprError(); |
| 1325 | } |
| 1326 | if (InitListExpr *ILE = dyn_cast_or_null<InitListExpr>(Initializer)) { |
| 1327 | // We do the initialization typechecking against the array type |
| 1328 | // corresponding to the number of initializers + 1 (to also check |
| 1329 | // default-initialization). |
| 1330 | unsigned NumElements = ILE->getNumInits() + 1; |
| 1331 | InitType = Context.getConstantArrayType(AllocType, |
| 1332 | llvm::APInt(Context.getTypeSize(Context.getSizeType()), NumElements), |
| 1333 | ArrayType::Normal, 0); |
| 1334 | } |
Anders Carlsson | 48c9501 | 2010-05-03 15:45:23 +0000 | [diff] [blame] | 1335 | } |
| 1336 | |
Richard Smith | 73ed67c | 2012-11-26 08:32:48 +0000 | [diff] [blame] | 1337 | // If we can perform the initialization, and we've not already done so, |
| 1338 | // do it now. |
Douglas Gregor | 99a2e60 | 2009-12-16 01:38:02 +0000 | [diff] [blame] | 1339 | if (!AllocType->isDependentType() && |
Ahmed Charles | 13a140c | 2012-02-25 11:00:22 +0000 | [diff] [blame] | 1340 | !Expr::hasAnyTypeDependentArguments( |
Richard Smith | 73ed67c | 2012-11-26 08:32:48 +0000 | [diff] [blame] | 1341 | llvm::makeArrayRef(Inits, NumInits)) && |
| 1342 | !HaveCompleteInit) { |
Sebastian Redl | 6dc00f6 | 2012-02-12 18:41:05 +0000 | [diff] [blame] | 1343 | // C++11 [expr.new]p15: |
Douglas Gregor | 99a2e60 | 2009-12-16 01:38:02 +0000 | [diff] [blame] | 1344 | // A new-expression that creates an object of type T initializes that |
| 1345 | // object as follows: |
| 1346 | InitializationKind Kind |
| 1347 | // - If the new-initializer is omitted, the object is default- |
| 1348 | // initialized (8.5); if no initialization is performed, |
| 1349 | // the object has indeterminate value |
Sebastian Redl | 2aed8b8 | 2012-02-16 12:22:20 +0000 | [diff] [blame] | 1350 | = initStyle == CXXNewExpr::NoInit |
| 1351 | ? InitializationKind::CreateDefault(TypeRange.getBegin()) |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1352 | // - Otherwise, the new-initializer is interpreted according to the |
Douglas Gregor | 99a2e60 | 2009-12-16 01:38:02 +0000 | [diff] [blame] | 1353 | // initialization rules of 8.5 for direct-initialization. |
Sebastian Redl | 2aed8b8 | 2012-02-16 12:22:20 +0000 | [diff] [blame] | 1354 | : initStyle == CXXNewExpr::ListInit |
| 1355 | ? InitializationKind::CreateDirectList(TypeRange.getBegin()) |
| 1356 | : InitializationKind::CreateDirect(TypeRange.getBegin(), |
| 1357 | DirectInitRange.getBegin(), |
| 1358 | DirectInitRange.getEnd()); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1359 | |
Douglas Gregor | 99a2e60 | 2009-12-16 01:38:02 +0000 | [diff] [blame] | 1360 | InitializedEntity Entity |
Sebastian Redl | bd45d25 | 2012-02-16 12:59:47 +0000 | [diff] [blame] | 1361 | = InitializedEntity::InitializeNew(StartLoc, InitType); |
Sebastian Redl | 2aed8b8 | 2012-02-16 12:22:20 +0000 | [diff] [blame] | 1362 | InitializationSequence InitSeq(*this, Entity, Kind, Inits, NumInits); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1363 | ExprResult FullInit = InitSeq.Perform(*this, Entity, Kind, |
Sebastian Redl | 2aed8b8 | 2012-02-16 12:22:20 +0000 | [diff] [blame] | 1364 | MultiExprArg(Inits, NumInits)); |
Douglas Gregor | 99a2e60 | 2009-12-16 01:38:02 +0000 | [diff] [blame] | 1365 | if (FullInit.isInvalid()) |
| 1366 | return ExprError(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1367 | |
Sebastian Redl | 2aed8b8 | 2012-02-16 12:22:20 +0000 | [diff] [blame] | 1368 | // FullInit is our initializer; strip off CXXBindTemporaryExprs, because |
| 1369 | // we don't want the initialized object to be destructed. |
| 1370 | if (CXXBindTemporaryExpr *Binder = |
| 1371 | dyn_cast_or_null<CXXBindTemporaryExpr>(FullInit.get())) |
| 1372 | FullInit = Owned(Binder->getSubExpr()); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1373 | |
Sebastian Redl | 2aed8b8 | 2012-02-16 12:22:20 +0000 | [diff] [blame] | 1374 | Initializer = FullInit.take(); |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 1375 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1376 | |
Douglas Gregor | 6d90870 | 2010-02-26 05:06:18 +0000 | [diff] [blame] | 1377 | // Mark the new and delete operators as referenced. |
| 1378 | if (OperatorNew) |
Eli Friedman | 5f2987c | 2012-02-02 03:46:19 +0000 | [diff] [blame] | 1379 | MarkFunctionReferenced(StartLoc, OperatorNew); |
Douglas Gregor | 6d90870 | 2010-02-26 05:06:18 +0000 | [diff] [blame] | 1380 | if (OperatorDelete) |
Eli Friedman | 5f2987c | 2012-02-02 03:46:19 +0000 | [diff] [blame] | 1381 | MarkFunctionReferenced(StartLoc, OperatorDelete); |
Douglas Gregor | 6d90870 | 2010-02-26 05:06:18 +0000 | [diff] [blame] | 1382 | |
John McCall | 84ff0fc | 2011-07-13 20:12:57 +0000 | [diff] [blame] | 1383 | // C++0x [expr.new]p17: |
| 1384 | // If the new expression creates an array of objects of class type, |
| 1385 | // access and ambiguity control are done for the destructor. |
David Blaikie | 426d6ca | 2012-03-10 23:40:02 +0000 | [diff] [blame] | 1386 | QualType BaseAllocType = Context.getBaseElementType(AllocType); |
| 1387 | if (ArraySize && !BaseAllocType->isDependentType()) { |
| 1388 | if (const RecordType *BaseRecordType = BaseAllocType->getAs<RecordType>()) { |
| 1389 | if (CXXDestructorDecl *dtor = LookupDestructor( |
| 1390 | cast<CXXRecordDecl>(BaseRecordType->getDecl()))) { |
| 1391 | MarkFunctionReferenced(StartLoc, dtor); |
| 1392 | CheckDestructorAccess(StartLoc, dtor, |
| 1393 | PDiag(diag::err_access_dtor) |
| 1394 | << BaseAllocType); |
| 1395 | DiagnoseUseOfDecl(dtor, StartLoc); |
| 1396 | } |
John McCall | 84ff0fc | 2011-07-13 20:12:57 +0000 | [diff] [blame] | 1397 | } |
| 1398 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1399 | |
Ted Kremenek | ad7fe86 | 2010-02-11 22:51:03 +0000 | [diff] [blame] | 1400 | return Owned(new (Context) CXXNewExpr(Context, UseGlobal, OperatorNew, |
Abramo Bagnara | 7cc58b4 | 2011-10-05 07:56:41 +0000 | [diff] [blame] | 1401 | OperatorDelete, |
John McCall | 6ec278d | 2011-01-27 09:37:56 +0000 | [diff] [blame] | 1402 | UsualArrayDeleteWantsSize, |
Benjamin Kramer | 3b6bef9 | 2012-08-24 11:54:20 +0000 | [diff] [blame] | 1403 | llvm::makeArrayRef(PlaceArgs, NumPlaceArgs), |
| 1404 | TypeIdParens, |
Sebastian Redl | 2aed8b8 | 2012-02-16 12:22:20 +0000 | [diff] [blame] | 1405 | ArraySize, initStyle, Initializer, |
Douglas Gregor | 1bb2a93 | 2010-09-07 21:49:58 +0000 | [diff] [blame] | 1406 | ResultType, AllocTypeInfo, |
David Blaikie | 5305641 | 2012-11-07 00:12:38 +0000 | [diff] [blame] | 1407 | Range, DirectInitRange)); |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 1408 | } |
| 1409 | |
Sebastian Redl | 2aed8b8 | 2012-02-16 12:22:20 +0000 | [diff] [blame] | 1410 | /// \brief Checks that a type is suitable as the allocated type |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 1411 | /// in a new-expression. |
Douglas Gregor | 3433cf7 | 2009-05-21 00:00:09 +0000 | [diff] [blame] | 1412 | bool Sema::CheckAllocatedType(QualType AllocType, SourceLocation Loc, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1413 | SourceRange R) { |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 1414 | // C++ 5.3.4p1: "[The] type shall be a complete object type, but not an |
| 1415 | // abstract class type or array thereof. |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 1416 | if (AllocType->isFunctionType()) |
Douglas Gregor | 3433cf7 | 2009-05-21 00:00:09 +0000 | [diff] [blame] | 1417 | return Diag(Loc, diag::err_bad_new_type) |
| 1418 | << AllocType << 0 << R; |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 1419 | else if (AllocType->isReferenceType()) |
Douglas Gregor | 3433cf7 | 2009-05-21 00:00:09 +0000 | [diff] [blame] | 1420 | return Diag(Loc, diag::err_bad_new_type) |
| 1421 | << AllocType << 1 << R; |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 1422 | else if (!AllocType->isDependentType() && |
Douglas Gregor | d10099e | 2012-05-04 16:32:21 +0000 | [diff] [blame] | 1423 | RequireCompleteType(Loc, AllocType, diag::err_new_incomplete_type,R)) |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 1424 | return true; |
Douglas Gregor | 3433cf7 | 2009-05-21 00:00:09 +0000 | [diff] [blame] | 1425 | else if (RequireNonAbstractType(Loc, AllocType, |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 1426 | diag::err_allocation_of_abstract_type)) |
| 1427 | return true; |
Douglas Gregor | a075076 | 2010-10-06 16:00:31 +0000 | [diff] [blame] | 1428 | else if (AllocType->isVariablyModifiedType()) |
| 1429 | return Diag(Loc, diag::err_variably_modified_new_type) |
| 1430 | << AllocType; |
Douglas Gregor | 5666d36 | 2011-04-15 19:46:20 +0000 | [diff] [blame] | 1431 | else if (unsigned AddressSpace = AllocType.getAddressSpace()) |
| 1432 | return Diag(Loc, diag::err_address_space_qualified_new) |
| 1433 | << AllocType.getUnqualifiedType() << AddressSpace; |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 1434 | else if (getLangOpts().ObjCAutoRefCount) { |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1435 | if (const ArrayType *AT = Context.getAsArrayType(AllocType)) { |
| 1436 | QualType BaseAllocType = Context.getBaseElementType(AT); |
| 1437 | if (BaseAllocType.getObjCLifetime() == Qualifiers::OCL_None && |
| 1438 | BaseAllocType->isObjCLifetimeType()) |
Argyrios Kyrtzidis | b8b0313 | 2011-06-24 00:08:59 +0000 | [diff] [blame] | 1439 | return Diag(Loc, diag::err_arc_new_array_without_ownership) |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1440 | << BaseAllocType; |
| 1441 | } |
| 1442 | } |
Douglas Gregor | 5666d36 | 2011-04-15 19:46:20 +0000 | [diff] [blame] | 1443 | |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 1444 | return false; |
| 1445 | } |
| 1446 | |
Douglas Gregor | 6d90870 | 2010-02-26 05:06:18 +0000 | [diff] [blame] | 1447 | /// \brief Determine whether the given function is a non-placement |
| 1448 | /// deallocation function. |
| 1449 | static bool isNonPlacementDeallocationFunction(FunctionDecl *FD) { |
| 1450 | if (FD->isInvalidDecl()) |
| 1451 | return false; |
| 1452 | |
| 1453 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(FD)) |
| 1454 | return Method->isUsualDeallocationFunction(); |
| 1455 | |
| 1456 | return ((FD->getOverloadedOperator() == OO_Delete || |
| 1457 | FD->getOverloadedOperator() == OO_Array_Delete) && |
| 1458 | FD->getNumParams() == 1); |
| 1459 | } |
| 1460 | |
Sebastian Redl | b5a57a6 | 2008-12-03 20:26:15 +0000 | [diff] [blame] | 1461 | /// FindAllocationFunctions - Finds the overloads of operator new and delete |
| 1462 | /// that are appropriate for the allocation. |
Sebastian Redl | 00e68e2 | 2009-02-09 18:24:27 +0000 | [diff] [blame] | 1463 | bool Sema::FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, |
| 1464 | bool UseGlobal, QualType AllocType, |
| 1465 | bool IsArray, Expr **PlaceArgs, |
| 1466 | unsigned NumPlaceArgs, |
Sebastian Redl | b5a57a6 | 2008-12-03 20:26:15 +0000 | [diff] [blame] | 1467 | FunctionDecl *&OperatorNew, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1468 | FunctionDecl *&OperatorDelete) { |
Sebastian Redl | b5a57a6 | 2008-12-03 20:26:15 +0000 | [diff] [blame] | 1469 | // --- Choosing an allocation function --- |
| 1470 | // C++ 5.3.4p8 - 14 & 18 |
| 1471 | // 1) If UseGlobal is true, only look in the global scope. Else, also look |
| 1472 | // in the scope of the allocated class. |
| 1473 | // 2) If an array size is given, look for operator new[], else look for |
| 1474 | // operator new. |
| 1475 | // 3) The first argument is always size_t. Append the arguments from the |
| 1476 | // placement form. |
Sebastian Redl | b5a57a6 | 2008-12-03 20:26:15 +0000 | [diff] [blame] | 1477 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1478 | SmallVector<Expr*, 8> AllocArgs(1 + NumPlaceArgs); |
Sebastian Redl | b5a57a6 | 2008-12-03 20:26:15 +0000 | [diff] [blame] | 1479 | // We don't care about the actual value of this argument. |
| 1480 | // FIXME: Should the Sema create the expression and embed it in the syntax |
| 1481 | // tree? Or should the consumer just recalculate the value? |
Argyrios Kyrtzidis | 9996a7f | 2010-08-28 09:06:06 +0000 | [diff] [blame] | 1482 | IntegerLiteral Size(Context, llvm::APInt::getNullValue( |
Douglas Gregor | bcfd1f5 | 2011-09-02 00:18:52 +0000 | [diff] [blame] | 1483 | Context.getTargetInfo().getPointerWidth(0)), |
Anders Carlsson | d67c4c3 | 2009-08-16 20:29:29 +0000 | [diff] [blame] | 1484 | Context.getSizeType(), |
| 1485 | SourceLocation()); |
| 1486 | AllocArgs[0] = &Size; |
Sebastian Redl | b5a57a6 | 2008-12-03 20:26:15 +0000 | [diff] [blame] | 1487 | std::copy(PlaceArgs, PlaceArgs + NumPlaceArgs, AllocArgs.begin() + 1); |
| 1488 | |
Douglas Gregor | 6d90870 | 2010-02-26 05:06:18 +0000 | [diff] [blame] | 1489 | // C++ [expr.new]p8: |
| 1490 | // If the allocated type is a non-array type, the allocation |
NAKAMURA Takumi | 0099530 | 2011-01-27 07:09:49 +0000 | [diff] [blame] | 1491 | // function's name is operator new and the deallocation function's |
Douglas Gregor | 6d90870 | 2010-02-26 05:06:18 +0000 | [diff] [blame] | 1492 | // name is operator delete. If the allocated type is an array |
NAKAMURA Takumi | 0099530 | 2011-01-27 07:09:49 +0000 | [diff] [blame] | 1493 | // type, the allocation function's name is operator new[] and the |
| 1494 | // deallocation function's name is operator delete[]. |
Sebastian Redl | b5a57a6 | 2008-12-03 20:26:15 +0000 | [diff] [blame] | 1495 | DeclarationName NewName = Context.DeclarationNames.getCXXOperatorName( |
| 1496 | IsArray ? OO_Array_New : OO_New); |
Douglas Gregor | 6d90870 | 2010-02-26 05:06:18 +0000 | [diff] [blame] | 1497 | DeclarationName DeleteName = Context.DeclarationNames.getCXXOperatorName( |
| 1498 | IsArray ? OO_Array_Delete : OO_Delete); |
| 1499 | |
Argyrios Kyrtzidis | d293298 | 2010-08-25 23:14:56 +0000 | [diff] [blame] | 1500 | QualType AllocElemType = Context.getBaseElementType(AllocType); |
| 1501 | |
| 1502 | if (AllocElemType->isRecordType() && !UseGlobal) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1503 | CXXRecordDecl *Record |
Argyrios Kyrtzidis | d293298 | 2010-08-25 23:14:56 +0000 | [diff] [blame] | 1504 | = cast<CXXRecordDecl>(AllocElemType->getAs<RecordType>()->getDecl()); |
Sebastian Redl | 00e68e2 | 2009-02-09 18:24:27 +0000 | [diff] [blame] | 1505 | if (FindAllocationOverload(StartLoc, Range, NewName, &AllocArgs[0], |
Sebastian Redl | 7f66239 | 2008-12-04 22:20:51 +0000 | [diff] [blame] | 1506 | AllocArgs.size(), Record, /*AllowMissing=*/true, |
| 1507 | OperatorNew)) |
Sebastian Redl | b5a57a6 | 2008-12-03 20:26:15 +0000 | [diff] [blame] | 1508 | return true; |
Sebastian Redl | b5a57a6 | 2008-12-03 20:26:15 +0000 | [diff] [blame] | 1509 | } |
| 1510 | if (!OperatorNew) { |
| 1511 | // Didn't find a member overload. Look for a global one. |
| 1512 | DeclareGlobalNewDelete(); |
Sebastian Redl | 7f66239 | 2008-12-04 22:20:51 +0000 | [diff] [blame] | 1513 | DeclContext *TUDecl = Context.getTranslationUnitDecl(); |
Sebastian Redl | 00e68e2 | 2009-02-09 18:24:27 +0000 | [diff] [blame] | 1514 | if (FindAllocationOverload(StartLoc, Range, NewName, &AllocArgs[0], |
Sebastian Redl | 7f66239 | 2008-12-04 22:20:51 +0000 | [diff] [blame] | 1515 | AllocArgs.size(), TUDecl, /*AllowMissing=*/false, |
| 1516 | OperatorNew)) |
Sebastian Redl | b5a57a6 | 2008-12-03 20:26:15 +0000 | [diff] [blame] | 1517 | return true; |
Sebastian Redl | b5a57a6 | 2008-12-03 20:26:15 +0000 | [diff] [blame] | 1518 | } |
| 1519 | |
John McCall | 9c82afc | 2010-04-20 02:18:25 +0000 | [diff] [blame] | 1520 | // We don't need an operator delete if we're running under |
| 1521 | // -fno-exceptions. |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 1522 | if (!getLangOpts().Exceptions) { |
John McCall | 9c82afc | 2010-04-20 02:18:25 +0000 | [diff] [blame] | 1523 | OperatorDelete = 0; |
| 1524 | return false; |
| 1525 | } |
| 1526 | |
Anders Carlsson | d958389 | 2009-05-31 20:26:12 +0000 | [diff] [blame] | 1527 | // FindAllocationOverload can change the passed in arguments, so we need to |
| 1528 | // copy them back. |
| 1529 | if (NumPlaceArgs > 0) |
| 1530 | std::copy(&AllocArgs[1], AllocArgs.end(), PlaceArgs); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1531 | |
Douglas Gregor | 6d90870 | 2010-02-26 05:06:18 +0000 | [diff] [blame] | 1532 | // C++ [expr.new]p19: |
| 1533 | // |
| 1534 | // If the new-expression begins with a unary :: operator, the |
NAKAMURA Takumi | 0099530 | 2011-01-27 07:09:49 +0000 | [diff] [blame] | 1535 | // deallocation function's name is looked up in the global |
Douglas Gregor | 6d90870 | 2010-02-26 05:06:18 +0000 | [diff] [blame] | 1536 | // scope. Otherwise, if the allocated type is a class type T or an |
NAKAMURA Takumi | 0099530 | 2011-01-27 07:09:49 +0000 | [diff] [blame] | 1537 | // array thereof, the deallocation function's name is looked up in |
Douglas Gregor | 6d90870 | 2010-02-26 05:06:18 +0000 | [diff] [blame] | 1538 | // the scope of T. If this lookup fails to find the name, or if |
| 1539 | // the allocated type is not a class type or array thereof, the |
NAKAMURA Takumi | 0099530 | 2011-01-27 07:09:49 +0000 | [diff] [blame] | 1540 | // deallocation function's name is looked up in the global scope. |
Douglas Gregor | 6d90870 | 2010-02-26 05:06:18 +0000 | [diff] [blame] | 1541 | LookupResult FoundDelete(*this, DeleteName, StartLoc, LookupOrdinaryName); |
Argyrios Kyrtzidis | d293298 | 2010-08-25 23:14:56 +0000 | [diff] [blame] | 1542 | if (AllocElemType->isRecordType() && !UseGlobal) { |
Douglas Gregor | 6d90870 | 2010-02-26 05:06:18 +0000 | [diff] [blame] | 1543 | CXXRecordDecl *RD |
Argyrios Kyrtzidis | d293298 | 2010-08-25 23:14:56 +0000 | [diff] [blame] | 1544 | = cast<CXXRecordDecl>(AllocElemType->getAs<RecordType>()->getDecl()); |
Douglas Gregor | 6d90870 | 2010-02-26 05:06:18 +0000 | [diff] [blame] | 1545 | LookupQualifiedName(FoundDelete, RD); |
| 1546 | } |
John McCall | 90c8c57 | 2010-03-18 08:19:33 +0000 | [diff] [blame] | 1547 | if (FoundDelete.isAmbiguous()) |
| 1548 | return true; // FIXME: clean up expressions? |
Douglas Gregor | 6d90870 | 2010-02-26 05:06:18 +0000 | [diff] [blame] | 1549 | |
| 1550 | if (FoundDelete.empty()) { |
| 1551 | DeclareGlobalNewDelete(); |
| 1552 | LookupQualifiedName(FoundDelete, Context.getTranslationUnitDecl()); |
| 1553 | } |
| 1554 | |
| 1555 | FoundDelete.suppressDiagnostics(); |
John McCall | 9aa472c | 2010-03-19 07:35:19 +0000 | [diff] [blame] | 1556 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1557 | SmallVector<std::pair<DeclAccessPair,FunctionDecl*>, 2> Matches; |
John McCall | 9aa472c | 2010-03-19 07:35:19 +0000 | [diff] [blame] | 1558 | |
John McCall | edeb6c9 | 2010-09-14 21:34:24 +0000 | [diff] [blame] | 1559 | // Whether we're looking for a placement operator delete is dictated |
| 1560 | // by whether we selected a placement operator new, not by whether |
| 1561 | // we had explicit placement arguments. This matters for things like |
| 1562 | // struct A { void *operator new(size_t, int = 0); ... }; |
| 1563 | // A *a = new A() |
| 1564 | bool isPlacementNew = (NumPlaceArgs > 0 || OperatorNew->param_size() != 1); |
| 1565 | |
| 1566 | if (isPlacementNew) { |
Douglas Gregor | 6d90870 | 2010-02-26 05:06:18 +0000 | [diff] [blame] | 1567 | // C++ [expr.new]p20: |
| 1568 | // A declaration of a placement deallocation function matches the |
| 1569 | // declaration of a placement allocation function if it has the |
| 1570 | // same number of parameters and, after parameter transformations |
| 1571 | // (8.3.5), all parameter types except the first are |
| 1572 | // identical. [...] |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1573 | // |
Douglas Gregor | 6d90870 | 2010-02-26 05:06:18 +0000 | [diff] [blame] | 1574 | // To perform this comparison, we compute the function type that |
| 1575 | // the deallocation function should have, and use that type both |
| 1576 | // for template argument deduction and for comparison purposes. |
John McCall | e23cf43 | 2010-12-14 08:05:40 +0000 | [diff] [blame] | 1577 | // |
| 1578 | // FIXME: this comparison should ignore CC and the like. |
Douglas Gregor | 6d90870 | 2010-02-26 05:06:18 +0000 | [diff] [blame] | 1579 | QualType ExpectedFunctionType; |
| 1580 | { |
| 1581 | const FunctionProtoType *Proto |
| 1582 | = OperatorNew->getType()->getAs<FunctionProtoType>(); |
John McCall | e23cf43 | 2010-12-14 08:05:40 +0000 | [diff] [blame] | 1583 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1584 | SmallVector<QualType, 4> ArgTypes; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1585 | ArgTypes.push_back(Context.VoidPtrTy); |
Douglas Gregor | 6d90870 | 2010-02-26 05:06:18 +0000 | [diff] [blame] | 1586 | for (unsigned I = 1, N = Proto->getNumArgs(); I < N; ++I) |
| 1587 | ArgTypes.push_back(Proto->getArgType(I)); |
| 1588 | |
John McCall | e23cf43 | 2010-12-14 08:05:40 +0000 | [diff] [blame] | 1589 | FunctionProtoType::ExtProtoInfo EPI; |
| 1590 | EPI.Variadic = Proto->isVariadic(); |
| 1591 | |
Douglas Gregor | 6d90870 | 2010-02-26 05:06:18 +0000 | [diff] [blame] | 1592 | ExpectedFunctionType |
| 1593 | = Context.getFunctionType(Context.VoidTy, ArgTypes.data(), |
John McCall | e23cf43 | 2010-12-14 08:05:40 +0000 | [diff] [blame] | 1594 | ArgTypes.size(), EPI); |
Douglas Gregor | 6d90870 | 2010-02-26 05:06:18 +0000 | [diff] [blame] | 1595 | } |
| 1596 | |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1597 | for (LookupResult::iterator D = FoundDelete.begin(), |
Douglas Gregor | 6d90870 | 2010-02-26 05:06:18 +0000 | [diff] [blame] | 1598 | DEnd = FoundDelete.end(); |
| 1599 | D != DEnd; ++D) { |
| 1600 | FunctionDecl *Fn = 0; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1601 | if (FunctionTemplateDecl *FnTmpl |
Douglas Gregor | 6d90870 | 2010-02-26 05:06:18 +0000 | [diff] [blame] | 1602 | = dyn_cast<FunctionTemplateDecl>((*D)->getUnderlyingDecl())) { |
| 1603 | // Perform template argument deduction to try to match the |
| 1604 | // expected function type. |
Craig Topper | 93e4599 | 2012-09-19 02:26:47 +0000 | [diff] [blame] | 1605 | TemplateDeductionInfo Info(StartLoc); |
Douglas Gregor | 6d90870 | 2010-02-26 05:06:18 +0000 | [diff] [blame] | 1606 | if (DeduceTemplateArguments(FnTmpl, 0, ExpectedFunctionType, Fn, Info)) |
| 1607 | continue; |
| 1608 | } else |
| 1609 | Fn = cast<FunctionDecl>((*D)->getUnderlyingDecl()); |
| 1610 | |
| 1611 | if (Context.hasSameType(Fn->getType(), ExpectedFunctionType)) |
John McCall | 9aa472c | 2010-03-19 07:35:19 +0000 | [diff] [blame] | 1612 | Matches.push_back(std::make_pair(D.getPair(), Fn)); |
Douglas Gregor | 6d90870 | 2010-02-26 05:06:18 +0000 | [diff] [blame] | 1613 | } |
| 1614 | } else { |
| 1615 | // C++ [expr.new]p20: |
| 1616 | // [...] Any non-placement deallocation function matches a |
| 1617 | // non-placement allocation function. [...] |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1618 | for (LookupResult::iterator D = FoundDelete.begin(), |
Douglas Gregor | 6d90870 | 2010-02-26 05:06:18 +0000 | [diff] [blame] | 1619 | DEnd = FoundDelete.end(); |
| 1620 | D != DEnd; ++D) { |
| 1621 | if (FunctionDecl *Fn = dyn_cast<FunctionDecl>((*D)->getUnderlyingDecl())) |
| 1622 | if (isNonPlacementDeallocationFunction(Fn)) |
John McCall | 9aa472c | 2010-03-19 07:35:19 +0000 | [diff] [blame] | 1623 | Matches.push_back(std::make_pair(D.getPair(), Fn)); |
Douglas Gregor | 6d90870 | 2010-02-26 05:06:18 +0000 | [diff] [blame] | 1624 | } |
| 1625 | } |
| 1626 | |
| 1627 | // C++ [expr.new]p20: |
| 1628 | // [...] If the lookup finds a single matching deallocation |
| 1629 | // function, that function will be called; otherwise, no |
| 1630 | // deallocation function will be called. |
| 1631 | if (Matches.size() == 1) { |
John McCall | 9aa472c | 2010-03-19 07:35:19 +0000 | [diff] [blame] | 1632 | OperatorDelete = Matches[0].second; |
Douglas Gregor | 6d90870 | 2010-02-26 05:06:18 +0000 | [diff] [blame] | 1633 | |
| 1634 | // C++0x [expr.new]p20: |
| 1635 | // If the lookup finds the two-parameter form of a usual |
| 1636 | // deallocation function (3.7.4.2) and that function, considered |
| 1637 | // as a placement deallocation function, would have been |
| 1638 | // selected as a match for the allocation function, the program |
| 1639 | // is ill-formed. |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 1640 | if (NumPlaceArgs && getLangOpts().CPlusPlus0x && |
Douglas Gregor | 6d90870 | 2010-02-26 05:06:18 +0000 | [diff] [blame] | 1641 | isNonPlacementDeallocationFunction(OperatorDelete)) { |
| 1642 | Diag(StartLoc, diag::err_placement_new_non_placement_delete) |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1643 | << SourceRange(PlaceArgs[0]->getLocStart(), |
Douglas Gregor | 6d90870 | 2010-02-26 05:06:18 +0000 | [diff] [blame] | 1644 | PlaceArgs[NumPlaceArgs - 1]->getLocEnd()); |
| 1645 | Diag(OperatorDelete->getLocation(), diag::note_previous_decl) |
| 1646 | << DeleteName; |
John McCall | 90c8c57 | 2010-03-18 08:19:33 +0000 | [diff] [blame] | 1647 | } else { |
| 1648 | CheckAllocationAccess(StartLoc, Range, FoundDelete.getNamingClass(), |
John McCall | 9aa472c | 2010-03-19 07:35:19 +0000 | [diff] [blame] | 1649 | Matches[0].first); |
Douglas Gregor | 6d90870 | 2010-02-26 05:06:18 +0000 | [diff] [blame] | 1650 | } |
| 1651 | } |
| 1652 | |
Sebastian Redl | b5a57a6 | 2008-12-03 20:26:15 +0000 | [diff] [blame] | 1653 | return false; |
| 1654 | } |
| 1655 | |
Sebastian Redl | 7f66239 | 2008-12-04 22:20:51 +0000 | [diff] [blame] | 1656 | /// FindAllocationOverload - Find an fitting overload for the allocation |
| 1657 | /// function in the specified scope. |
Sebastian Redl | 00e68e2 | 2009-02-09 18:24:27 +0000 | [diff] [blame] | 1658 | bool Sema::FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, |
| 1659 | DeclarationName Name, Expr** Args, |
| 1660 | unsigned NumArgs, DeclContext *Ctx, |
Sean Hunt | 2be7e90 | 2011-05-12 22:46:29 +0000 | [diff] [blame] | 1661 | bool AllowMissing, FunctionDecl *&Operator, |
| 1662 | bool Diagnose) { |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 1663 | LookupResult R(*this, Name, StartLoc, LookupOrdinaryName); |
| 1664 | LookupQualifiedName(R, Ctx); |
John McCall | f36e02d | 2009-10-09 21:13:30 +0000 | [diff] [blame] | 1665 | if (R.empty()) { |
Sean Hunt | 2be7e90 | 2011-05-12 22:46:29 +0000 | [diff] [blame] | 1666 | if (AllowMissing || !Diagnose) |
Sebastian Redl | 7f66239 | 2008-12-04 22:20:51 +0000 | [diff] [blame] | 1667 | return false; |
Sebastian Redl | 7f66239 | 2008-12-04 22:20:51 +0000 | [diff] [blame] | 1668 | return Diag(StartLoc, diag::err_ovl_no_viable_function_in_call) |
Chris Lattner | 4330d65 | 2009-02-17 07:29:20 +0000 | [diff] [blame] | 1669 | << Name << Range; |
Sebastian Redl | 7f66239 | 2008-12-04 22:20:51 +0000 | [diff] [blame] | 1670 | } |
| 1671 | |
John McCall | 90c8c57 | 2010-03-18 08:19:33 +0000 | [diff] [blame] | 1672 | if (R.isAmbiguous()) |
| 1673 | return true; |
| 1674 | |
| 1675 | R.suppressDiagnostics(); |
John McCall | f36e02d | 2009-10-09 21:13:30 +0000 | [diff] [blame] | 1676 | |
John McCall | 5769d61 | 2010-02-08 23:07:23 +0000 | [diff] [blame] | 1677 | OverloadCandidateSet Candidates(StartLoc); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1678 | for (LookupResult::iterator Alloc = R.begin(), AllocEnd = R.end(); |
Douglas Gregor | 5d64e5b | 2009-09-30 00:03:47 +0000 | [diff] [blame] | 1679 | Alloc != AllocEnd; ++Alloc) { |
Douglas Gregor | 3fc749d | 2008-12-23 00:26:44 +0000 | [diff] [blame] | 1680 | // Even member operator new/delete are implicitly treated as |
| 1681 | // static, so don't use AddMemberCandidate. |
John McCall | 9aa472c | 2010-03-19 07:35:19 +0000 | [diff] [blame] | 1682 | NamedDecl *D = (*Alloc)->getUnderlyingDecl(); |
Chandler Carruth | 4a73ea9 | 2010-02-03 11:02:14 +0000 | [diff] [blame] | 1683 | |
John McCall | 9aa472c | 2010-03-19 07:35:19 +0000 | [diff] [blame] | 1684 | if (FunctionTemplateDecl *FnTemplate = dyn_cast<FunctionTemplateDecl>(D)) { |
| 1685 | AddTemplateOverloadCandidate(FnTemplate, Alloc.getPair(), |
Ahmed Charles | 13a140c | 2012-02-25 11:00:22 +0000 | [diff] [blame] | 1686 | /*ExplicitTemplateArgs=*/0, |
| 1687 | llvm::makeArrayRef(Args, NumArgs), |
Chandler Carruth | 4a73ea9 | 2010-02-03 11:02:14 +0000 | [diff] [blame] | 1688 | Candidates, |
| 1689 | /*SuppressUserConversions=*/false); |
Douglas Gregor | 9091656 | 2009-09-29 18:16:17 +0000 | [diff] [blame] | 1690 | continue; |
Chandler Carruth | 4a73ea9 | 2010-02-03 11:02:14 +0000 | [diff] [blame] | 1691 | } |
| 1692 | |
John McCall | 9aa472c | 2010-03-19 07:35:19 +0000 | [diff] [blame] | 1693 | FunctionDecl *Fn = cast<FunctionDecl>(D); |
Ahmed Charles | 13a140c | 2012-02-25 11:00:22 +0000 | [diff] [blame] | 1694 | AddOverloadCandidate(Fn, Alloc.getPair(), |
| 1695 | llvm::makeArrayRef(Args, NumArgs), Candidates, |
Chandler Carruth | 4a73ea9 | 2010-02-03 11:02:14 +0000 | [diff] [blame] | 1696 | /*SuppressUserConversions=*/false); |
Sebastian Redl | 7f66239 | 2008-12-04 22:20:51 +0000 | [diff] [blame] | 1697 | } |
| 1698 | |
| 1699 | // Do the resolution. |
| 1700 | OverloadCandidateSet::iterator Best; |
John McCall | 120d63c | 2010-08-24 20:38:10 +0000 | [diff] [blame] | 1701 | switch (Candidates.BestViableFunction(*this, StartLoc, Best)) { |
Sebastian Redl | 7f66239 | 2008-12-04 22:20:51 +0000 | [diff] [blame] | 1702 | case OR_Success: { |
| 1703 | // Got one! |
| 1704 | FunctionDecl *FnDecl = Best->Function; |
Eli Friedman | 5f2987c | 2012-02-02 03:46:19 +0000 | [diff] [blame] | 1705 | MarkFunctionReferenced(StartLoc, FnDecl); |
Sebastian Redl | 7f66239 | 2008-12-04 22:20:51 +0000 | [diff] [blame] | 1706 | // The first argument is size_t, and the first parameter must be size_t, |
| 1707 | // too. This is checked on declaration and can be assumed. (It can't be |
| 1708 | // asserted on, though, since invalid decls are left in there.) |
John McCall | 90c8c57 | 2010-03-18 08:19:33 +0000 | [diff] [blame] | 1709 | // Watch out for variadic allocator function. |
Fariborz Jahanian | 048f52a | 2009-11-24 18:29:37 +0000 | [diff] [blame] | 1710 | unsigned NumArgsInFnDecl = FnDecl->getNumParams(); |
| 1711 | for (unsigned i = 0; (i < NumArgs && i < NumArgsInFnDecl); ++i) { |
Sean Hunt | 2be7e90 | 2011-05-12 22:46:29 +0000 | [diff] [blame] | 1712 | InitializedEntity Entity = InitializedEntity::InitializeParameter(Context, |
| 1713 | FnDecl->getParamDecl(i)); |
| 1714 | |
| 1715 | if (!Diagnose && !CanPerformCopyInitialization(Entity, Owned(Args[i]))) |
| 1716 | return true; |
| 1717 | |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1718 | ExprResult Result |
Sean Hunt | 2be7e90 | 2011-05-12 22:46:29 +0000 | [diff] [blame] | 1719 | = PerformCopyInitialization(Entity, SourceLocation(), Owned(Args[i])); |
Douglas Gregor | 29ecaba | 2010-03-26 20:35:59 +0000 | [diff] [blame] | 1720 | if (Result.isInvalid()) |
Sebastian Redl | 7f66239 | 2008-12-04 22:20:51 +0000 | [diff] [blame] | 1721 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1722 | |
Douglas Gregor | 29ecaba | 2010-03-26 20:35:59 +0000 | [diff] [blame] | 1723 | Args[i] = Result.takeAs<Expr>(); |
Sebastian Redl | 7f66239 | 2008-12-04 22:20:51 +0000 | [diff] [blame] | 1724 | } |
Richard Smith | 9a561d5 | 2012-02-26 09:11:52 +0000 | [diff] [blame] | 1725 | |
Sebastian Redl | 7f66239 | 2008-12-04 22:20:51 +0000 | [diff] [blame] | 1726 | Operator = FnDecl; |
Richard Smith | 9a561d5 | 2012-02-26 09:11:52 +0000 | [diff] [blame] | 1727 | |
| 1728 | if (CheckAllocationAccess(StartLoc, Range, R.getNamingClass(), |
| 1729 | Best->FoundDecl, Diagnose) == AR_inaccessible) |
| 1730 | return true; |
| 1731 | |
Sebastian Redl | 7f66239 | 2008-12-04 22:20:51 +0000 | [diff] [blame] | 1732 | return false; |
| 1733 | } |
| 1734 | |
| 1735 | case OR_No_Viable_Function: |
Chandler Carruth | 361d380 | 2011-06-08 10:26:03 +0000 | [diff] [blame] | 1736 | if (Diagnose) { |
Sean Hunt | 2be7e90 | 2011-05-12 22:46:29 +0000 | [diff] [blame] | 1737 | Diag(StartLoc, diag::err_ovl_no_viable_function_in_call) |
| 1738 | << Name << Range; |
Ahmed Charles | 13a140c | 2012-02-25 11:00:22 +0000 | [diff] [blame] | 1739 | Candidates.NoteCandidates(*this, OCD_AllCandidates, |
| 1740 | llvm::makeArrayRef(Args, NumArgs)); |
Chandler Carruth | 361d380 | 2011-06-08 10:26:03 +0000 | [diff] [blame] | 1741 | } |
Sebastian Redl | 7f66239 | 2008-12-04 22:20:51 +0000 | [diff] [blame] | 1742 | return true; |
| 1743 | |
| 1744 | case OR_Ambiguous: |
Chandler Carruth | 361d380 | 2011-06-08 10:26:03 +0000 | [diff] [blame] | 1745 | if (Diagnose) { |
Sean Hunt | 2be7e90 | 2011-05-12 22:46:29 +0000 | [diff] [blame] | 1746 | Diag(StartLoc, diag::err_ovl_ambiguous_call) |
| 1747 | << Name << Range; |
Ahmed Charles | 13a140c | 2012-02-25 11:00:22 +0000 | [diff] [blame] | 1748 | Candidates.NoteCandidates(*this, OCD_ViableCandidates, |
| 1749 | llvm::makeArrayRef(Args, NumArgs)); |
Chandler Carruth | 361d380 | 2011-06-08 10:26:03 +0000 | [diff] [blame] | 1750 | } |
Sebastian Redl | 7f66239 | 2008-12-04 22:20:51 +0000 | [diff] [blame] | 1751 | return true; |
Douglas Gregor | 48f3bb9 | 2009-02-18 21:56:37 +0000 | [diff] [blame] | 1752 | |
Douglas Gregor | 0a0d2b1 | 2011-03-23 00:50:03 +0000 | [diff] [blame] | 1753 | case OR_Deleted: { |
Chandler Carruth | 361d380 | 2011-06-08 10:26:03 +0000 | [diff] [blame] | 1754 | if (Diagnose) { |
Sean Hunt | 2be7e90 | 2011-05-12 22:46:29 +0000 | [diff] [blame] | 1755 | Diag(StartLoc, diag::err_ovl_deleted_call) |
| 1756 | << Best->Function->isDeleted() |
| 1757 | << Name |
| 1758 | << getDeletedOrUnavailableSuffix(Best->Function) |
| 1759 | << Range; |
Ahmed Charles | 13a140c | 2012-02-25 11:00:22 +0000 | [diff] [blame] | 1760 | Candidates.NoteCandidates(*this, OCD_AllCandidates, |
| 1761 | llvm::makeArrayRef(Args, NumArgs)); |
Chandler Carruth | 361d380 | 2011-06-08 10:26:03 +0000 | [diff] [blame] | 1762 | } |
Douglas Gregor | 48f3bb9 | 2009-02-18 21:56:37 +0000 | [diff] [blame] | 1763 | return true; |
Sebastian Redl | 7f66239 | 2008-12-04 22:20:51 +0000 | [diff] [blame] | 1764 | } |
Douglas Gregor | 0a0d2b1 | 2011-03-23 00:50:03 +0000 | [diff] [blame] | 1765 | } |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 1766 | llvm_unreachable("Unreachable, bad result from BestViableFunction"); |
Sebastian Redl | 7f66239 | 2008-12-04 22:20:51 +0000 | [diff] [blame] | 1767 | } |
| 1768 | |
| 1769 | |
Sebastian Redl | b5a57a6 | 2008-12-03 20:26:15 +0000 | [diff] [blame] | 1770 | /// DeclareGlobalNewDelete - Declare the global forms of operator new and |
| 1771 | /// delete. These are: |
| 1772 | /// @code |
Sebastian Redl | 8999fe1 | 2011-03-14 18:08:30 +0000 | [diff] [blame] | 1773 | /// // C++03: |
Sebastian Redl | b5a57a6 | 2008-12-03 20:26:15 +0000 | [diff] [blame] | 1774 | /// void* operator new(std::size_t) throw(std::bad_alloc); |
| 1775 | /// void* operator new[](std::size_t) throw(std::bad_alloc); |
| 1776 | /// void operator delete(void *) throw(); |
| 1777 | /// void operator delete[](void *) throw(); |
Sebastian Redl | 8999fe1 | 2011-03-14 18:08:30 +0000 | [diff] [blame] | 1778 | /// // C++0x: |
| 1779 | /// void* operator new(std::size_t); |
| 1780 | /// void* operator new[](std::size_t); |
| 1781 | /// void operator delete(void *); |
| 1782 | /// void operator delete[](void *); |
Sebastian Redl | b5a57a6 | 2008-12-03 20:26:15 +0000 | [diff] [blame] | 1783 | /// @endcode |
Sebastian Redl | 8999fe1 | 2011-03-14 18:08:30 +0000 | [diff] [blame] | 1784 | /// C++0x operator delete is implicitly noexcept. |
Sebastian Redl | b5a57a6 | 2008-12-03 20:26:15 +0000 | [diff] [blame] | 1785 | /// Note that the placement and nothrow forms of new are *not* implicitly |
| 1786 | /// declared. Their use requires including \<new\>. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1787 | void Sema::DeclareGlobalNewDelete() { |
Sebastian Redl | b5a57a6 | 2008-12-03 20:26:15 +0000 | [diff] [blame] | 1788 | if (GlobalNewDeleteDeclared) |
| 1789 | return; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1790 | |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 1791 | // C++ [basic.std.dynamic]p2: |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1792 | // [...] The following allocation and deallocation functions (18.4) are |
| 1793 | // implicitly declared in global scope in each translation unit of a |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 1794 | // program |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1795 | // |
Sebastian Redl | 8999fe1 | 2011-03-14 18:08:30 +0000 | [diff] [blame] | 1796 | // C++03: |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 1797 | // void* operator new(std::size_t) throw(std::bad_alloc); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1798 | // void* operator new[](std::size_t) throw(std::bad_alloc); |
| 1799 | // void operator delete(void*) throw(); |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 1800 | // void operator delete[](void*) throw(); |
Sebastian Redl | 8999fe1 | 2011-03-14 18:08:30 +0000 | [diff] [blame] | 1801 | // C++0x: |
| 1802 | // void* operator new(std::size_t); |
| 1803 | // void* operator new[](std::size_t); |
| 1804 | // void operator delete(void*); |
| 1805 | // void operator delete[](void*); |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 1806 | // |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1807 | // These implicit declarations introduce only the function names operator |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 1808 | // new, operator new[], operator delete, operator delete[]. |
| 1809 | // |
| 1810 | // Here, we need to refer to std::bad_alloc, so we will implicitly declare |
| 1811 | // "std" or "bad_alloc" as necessary to form the exception specification. |
| 1812 | // However, we do not make these implicit declarations visible to name |
| 1813 | // lookup. |
Sebastian Redl | 8999fe1 | 2011-03-14 18:08:30 +0000 | [diff] [blame] | 1814 | // Note that the C++0x versions of operator delete are deallocation functions, |
| 1815 | // and thus are implicitly noexcept. |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 1816 | if (!StdBadAlloc && !getLangOpts().CPlusPlus0x) { |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 1817 | // The "std::bad_alloc" class has not yet been declared, so build it |
| 1818 | // implicitly. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1819 | StdBadAlloc = CXXRecordDecl::Create(Context, TTK_Class, |
| 1820 | getOrCreateStdNamespace(), |
Abramo Bagnara | ba877ad | 2011-03-09 14:09:51 +0000 | [diff] [blame] | 1821 | SourceLocation(), SourceLocation(), |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1822 | &PP.getIdentifierTable().get("bad_alloc"), |
Abramo Bagnara | ba877ad | 2011-03-09 14:09:51 +0000 | [diff] [blame] | 1823 | 0); |
Argyrios Kyrtzidis | 76c38d3 | 2010-08-02 07:14:54 +0000 | [diff] [blame] | 1824 | getStdBadAlloc()->setImplicit(true); |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 1825 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1826 | |
Sebastian Redl | b5a57a6 | 2008-12-03 20:26:15 +0000 | [diff] [blame] | 1827 | GlobalNewDeleteDeclared = true; |
| 1828 | |
| 1829 | QualType VoidPtr = Context.getPointerType(Context.VoidTy); |
| 1830 | QualType SizeT = Context.getSizeType(); |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 1831 | bool AssumeSaneOperatorNew = getLangOpts().AssumeSaneOperatorNew; |
Sebastian Redl | b5a57a6 | 2008-12-03 20:26:15 +0000 | [diff] [blame] | 1832 | |
Sebastian Redl | b5a57a6 | 2008-12-03 20:26:15 +0000 | [diff] [blame] | 1833 | DeclareGlobalAllocationFunction( |
| 1834 | Context.DeclarationNames.getCXXOperatorName(OO_New), |
Nuno Lopes | fc28448 | 2009-12-16 16:59:22 +0000 | [diff] [blame] | 1835 | VoidPtr, SizeT, AssumeSaneOperatorNew); |
Sebastian Redl | b5a57a6 | 2008-12-03 20:26:15 +0000 | [diff] [blame] | 1836 | DeclareGlobalAllocationFunction( |
| 1837 | Context.DeclarationNames.getCXXOperatorName(OO_Array_New), |
Nuno Lopes | fc28448 | 2009-12-16 16:59:22 +0000 | [diff] [blame] | 1838 | VoidPtr, SizeT, AssumeSaneOperatorNew); |
Sebastian Redl | b5a57a6 | 2008-12-03 20:26:15 +0000 | [diff] [blame] | 1839 | DeclareGlobalAllocationFunction( |
| 1840 | Context.DeclarationNames.getCXXOperatorName(OO_Delete), |
| 1841 | Context.VoidTy, VoidPtr); |
| 1842 | DeclareGlobalAllocationFunction( |
| 1843 | Context.DeclarationNames.getCXXOperatorName(OO_Array_Delete), |
| 1844 | Context.VoidTy, VoidPtr); |
| 1845 | } |
| 1846 | |
| 1847 | /// DeclareGlobalAllocationFunction - Declares a single implicit global |
| 1848 | /// allocation function if it doesn't already exist. |
| 1849 | void Sema::DeclareGlobalAllocationFunction(DeclarationName Name, |
Nuno Lopes | fc28448 | 2009-12-16 16:59:22 +0000 | [diff] [blame] | 1850 | QualType Return, QualType Argument, |
| 1851 | bool AddMallocAttr) { |
Sebastian Redl | b5a57a6 | 2008-12-03 20:26:15 +0000 | [diff] [blame] | 1852 | DeclContext *GlobalCtx = Context.getTranslationUnitDecl(); |
| 1853 | |
| 1854 | // Check if this function is already declared. |
Douglas Gregor | 6ed40e3 | 2008-12-23 21:05:05 +0000 | [diff] [blame] | 1855 | { |
David Blaikie | 3bc93e3 | 2012-12-19 00:45:41 +0000 | [diff] [blame] | 1856 | DeclContext::lookup_result R = GlobalCtx->lookup(Name); |
| 1857 | for (DeclContext::lookup_iterator Alloc = R.begin(), AllocEnd = R.end(); |
Douglas Gregor | 6ed40e3 | 2008-12-23 21:05:05 +0000 | [diff] [blame] | 1858 | Alloc != AllocEnd; ++Alloc) { |
Chandler Carruth | 4a73ea9 | 2010-02-03 11:02:14 +0000 | [diff] [blame] | 1859 | // Only look at non-template functions, as it is the predefined, |
| 1860 | // non-templated allocation function we are trying to declare here. |
| 1861 | if (FunctionDecl *Func = dyn_cast<FunctionDecl>(*Alloc)) { |
| 1862 | QualType InitialParamType = |
Douglas Gregor | 6e790ab | 2009-12-22 23:42:49 +0000 | [diff] [blame] | 1863 | Context.getCanonicalType( |
Chandler Carruth | 4a73ea9 | 2010-02-03 11:02:14 +0000 | [diff] [blame] | 1864 | Func->getParamDecl(0)->getType().getUnqualifiedType()); |
| 1865 | // FIXME: Do we need to check for default arguments here? |
Douglas Gregor | 7b86862 | 2010-08-18 15:06:25 +0000 | [diff] [blame] | 1866 | if (Func->getNumParams() == 1 && InitialParamType == Argument) { |
| 1867 | if(AddMallocAttr && !Func->hasAttr<MallocAttr>()) |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 1868 | Func->addAttr(::new (Context) MallocAttr(SourceLocation(), Context)); |
Chandler Carruth | 4a73ea9 | 2010-02-03 11:02:14 +0000 | [diff] [blame] | 1869 | return; |
Douglas Gregor | 7b86862 | 2010-08-18 15:06:25 +0000 | [diff] [blame] | 1870 | } |
Chandler Carruth | 4a73ea9 | 2010-02-03 11:02:14 +0000 | [diff] [blame] | 1871 | } |
Sebastian Redl | b5a57a6 | 2008-12-03 20:26:15 +0000 | [diff] [blame] | 1872 | } |
| 1873 | } |
| 1874 | |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 1875 | QualType BadAllocType; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1876 | bool HasBadAllocExceptionSpec |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 1877 | = (Name.getCXXOverloadedOperator() == OO_New || |
| 1878 | Name.getCXXOverloadedOperator() == OO_Array_New); |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 1879 | if (HasBadAllocExceptionSpec && !getLangOpts().CPlusPlus0x) { |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 1880 | assert(StdBadAlloc && "Must have std::bad_alloc declared"); |
Argyrios Kyrtzidis | 76c38d3 | 2010-08-02 07:14:54 +0000 | [diff] [blame] | 1881 | BadAllocType = Context.getTypeDeclType(getStdBadAlloc()); |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 1882 | } |
John McCall | e23cf43 | 2010-12-14 08:05:40 +0000 | [diff] [blame] | 1883 | |
| 1884 | FunctionProtoType::ExtProtoInfo EPI; |
John McCall | e23cf43 | 2010-12-14 08:05:40 +0000 | [diff] [blame] | 1885 | if (HasBadAllocExceptionSpec) { |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 1886 | if (!getLangOpts().CPlusPlus0x) { |
Sebastian Redl | 8999fe1 | 2011-03-14 18:08:30 +0000 | [diff] [blame] | 1887 | EPI.ExceptionSpecType = EST_Dynamic; |
| 1888 | EPI.NumExceptions = 1; |
| 1889 | EPI.Exceptions = &BadAllocType; |
| 1890 | } |
Sebastian Redl | 60618fa | 2011-03-12 11:50:43 +0000 | [diff] [blame] | 1891 | } else { |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 1892 | EPI.ExceptionSpecType = getLangOpts().CPlusPlus0x ? |
Sebastian Redl | 8999fe1 | 2011-03-14 18:08:30 +0000 | [diff] [blame] | 1893 | EST_BasicNoexcept : EST_DynamicNone; |
John McCall | e23cf43 | 2010-12-14 08:05:40 +0000 | [diff] [blame] | 1894 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1895 | |
John McCall | e23cf43 | 2010-12-14 08:05:40 +0000 | [diff] [blame] | 1896 | QualType FnType = Context.getFunctionType(Return, &Argument, 1, EPI); |
Sebastian Redl | b5a57a6 | 2008-12-03 20:26:15 +0000 | [diff] [blame] | 1897 | FunctionDecl *Alloc = |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 1898 | FunctionDecl::Create(Context, GlobalCtx, SourceLocation(), |
| 1899 | SourceLocation(), Name, |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 1900 | FnType, /*TInfo=*/0, SC_None, |
| 1901 | SC_None, false, true); |
Sebastian Redl | b5a57a6 | 2008-12-03 20:26:15 +0000 | [diff] [blame] | 1902 | Alloc->setImplicit(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1903 | |
Nuno Lopes | fc28448 | 2009-12-16 16:59:22 +0000 | [diff] [blame] | 1904 | if (AddMallocAttr) |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 1905 | Alloc->addAttr(::new (Context) MallocAttr(SourceLocation(), Context)); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1906 | |
Sebastian Redl | b5a57a6 | 2008-12-03 20:26:15 +0000 | [diff] [blame] | 1907 | ParmVarDecl *Param = ParmVarDecl::Create(Context, Alloc, SourceLocation(), |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 1908 | SourceLocation(), 0, |
| 1909 | Argument, /*TInfo=*/0, |
| 1910 | SC_None, SC_None, 0); |
David Blaikie | 4278c65 | 2011-09-21 18:16:56 +0000 | [diff] [blame] | 1911 | Alloc->setParams(Param); |
Sebastian Redl | b5a57a6 | 2008-12-03 20:26:15 +0000 | [diff] [blame] | 1912 | |
Douglas Gregor | 6ed40e3 | 2008-12-23 21:05:05 +0000 | [diff] [blame] | 1913 | // FIXME: Also add this declaration to the IdentifierResolver, but |
| 1914 | // make sure it is at the end of the chain to coincide with the |
| 1915 | // global scope. |
John McCall | 5f1e094 | 2010-08-24 08:50:51 +0000 | [diff] [blame] | 1916 | Context.getTranslationUnitDecl()->addDecl(Alloc); |
Sebastian Redl | b5a57a6 | 2008-12-03 20:26:15 +0000 | [diff] [blame] | 1917 | } |
| 1918 | |
Anders Carlsson | 78f7455 | 2009-11-15 18:45:20 +0000 | [diff] [blame] | 1919 | bool Sema::FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, |
| 1920 | DeclarationName Name, |
Sean Hunt | 2be7e90 | 2011-05-12 22:46:29 +0000 | [diff] [blame] | 1921 | FunctionDecl* &Operator, bool Diagnose) { |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 1922 | LookupResult Found(*this, Name, StartLoc, LookupOrdinaryName); |
Anders Carlsson | 78f7455 | 2009-11-15 18:45:20 +0000 | [diff] [blame] | 1923 | // Try to find operator delete/operator delete[] in class scope. |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 1924 | LookupQualifiedName(Found, RD); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1925 | |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 1926 | if (Found.isAmbiguous()) |
Anders Carlsson | 78f7455 | 2009-11-15 18:45:20 +0000 | [diff] [blame] | 1927 | return true; |
Anders Carlsson | 78f7455 | 2009-11-15 18:45:20 +0000 | [diff] [blame] | 1928 | |
Chandler Carruth | 2389324 | 2010-06-28 00:30:51 +0000 | [diff] [blame] | 1929 | Found.suppressDiagnostics(); |
| 1930 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1931 | SmallVector<DeclAccessPair,4> Matches; |
Anders Carlsson | 78f7455 | 2009-11-15 18:45:20 +0000 | [diff] [blame] | 1932 | for (LookupResult::iterator F = Found.begin(), FEnd = Found.end(); |
| 1933 | F != FEnd; ++F) { |
Chandler Carruth | 09556fd | 2010-08-08 07:04:00 +0000 | [diff] [blame] | 1934 | NamedDecl *ND = (*F)->getUnderlyingDecl(); |
| 1935 | |
| 1936 | // Ignore template operator delete members from the check for a usual |
| 1937 | // deallocation function. |
| 1938 | if (isa<FunctionTemplateDecl>(ND)) |
| 1939 | continue; |
| 1940 | |
| 1941 | if (cast<CXXMethodDecl>(ND)->isUsualDeallocationFunction()) |
John McCall | 046a746 | 2010-08-04 00:31:26 +0000 | [diff] [blame] | 1942 | Matches.push_back(F.getPair()); |
| 1943 | } |
| 1944 | |
| 1945 | // There's exactly one suitable operator; pick it. |
| 1946 | if (Matches.size() == 1) { |
| 1947 | Operator = cast<CXXMethodDecl>(Matches[0]->getUnderlyingDecl()); |
Sean Hunt | 2be7e90 | 2011-05-12 22:46:29 +0000 | [diff] [blame] | 1948 | |
| 1949 | if (Operator->isDeleted()) { |
| 1950 | if (Diagnose) { |
| 1951 | Diag(StartLoc, diag::err_deleted_function_use); |
Richard Smith | 6c4c36c | 2012-03-30 20:53:28 +0000 | [diff] [blame] | 1952 | NoteDeletedFunction(Operator); |
Sean Hunt | 2be7e90 | 2011-05-12 22:46:29 +0000 | [diff] [blame] | 1953 | } |
| 1954 | return true; |
| 1955 | } |
| 1956 | |
Richard Smith | 9a561d5 | 2012-02-26 09:11:52 +0000 | [diff] [blame] | 1957 | if (CheckAllocationAccess(StartLoc, SourceRange(), Found.getNamingClass(), |
| 1958 | Matches[0], Diagnose) == AR_inaccessible) |
| 1959 | return true; |
| 1960 | |
John McCall | 046a746 | 2010-08-04 00:31:26 +0000 | [diff] [blame] | 1961 | return false; |
| 1962 | |
| 1963 | // We found multiple suitable operators; complain about the ambiguity. |
| 1964 | } else if (!Matches.empty()) { |
Sean Hunt | 2be7e90 | 2011-05-12 22:46:29 +0000 | [diff] [blame] | 1965 | if (Diagnose) { |
Sean Hunt | cb45a0f | 2011-05-12 22:46:25 +0000 | [diff] [blame] | 1966 | Diag(StartLoc, diag::err_ambiguous_suitable_delete_member_function_found) |
| 1967 | << Name << RD; |
John McCall | 046a746 | 2010-08-04 00:31:26 +0000 | [diff] [blame] | 1968 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1969 | for (SmallVectorImpl<DeclAccessPair>::iterator |
Sean Hunt | cb45a0f | 2011-05-12 22:46:25 +0000 | [diff] [blame] | 1970 | F = Matches.begin(), FEnd = Matches.end(); F != FEnd; ++F) |
| 1971 | Diag((*F)->getUnderlyingDecl()->getLocation(), |
| 1972 | diag::note_member_declared_here) << Name; |
| 1973 | } |
John McCall | 046a746 | 2010-08-04 00:31:26 +0000 | [diff] [blame] | 1974 | return true; |
Anders Carlsson | 78f7455 | 2009-11-15 18:45:20 +0000 | [diff] [blame] | 1975 | } |
| 1976 | |
| 1977 | // We did find operator delete/operator delete[] declarations, but |
| 1978 | // none of them were suitable. |
| 1979 | if (!Found.empty()) { |
Sean Hunt | 2be7e90 | 2011-05-12 22:46:29 +0000 | [diff] [blame] | 1980 | if (Diagnose) { |
Sean Hunt | cb45a0f | 2011-05-12 22:46:25 +0000 | [diff] [blame] | 1981 | Diag(StartLoc, diag::err_no_suitable_delete_member_function_found) |
| 1982 | << Name << RD; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1983 | |
Sean Hunt | cb45a0f | 2011-05-12 22:46:25 +0000 | [diff] [blame] | 1984 | for (LookupResult::iterator F = Found.begin(), FEnd = Found.end(); |
| 1985 | F != FEnd; ++F) |
| 1986 | Diag((*F)->getUnderlyingDecl()->getLocation(), |
| 1987 | diag::note_member_declared_here) << Name; |
| 1988 | } |
Anders Carlsson | 78f7455 | 2009-11-15 18:45:20 +0000 | [diff] [blame] | 1989 | return true; |
| 1990 | } |
| 1991 | |
| 1992 | // Look for a global declaration. |
| 1993 | DeclareGlobalNewDelete(); |
| 1994 | DeclContext *TUDecl = Context.getTranslationUnitDecl(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 1995 | |
Anders Carlsson | 78f7455 | 2009-11-15 18:45:20 +0000 | [diff] [blame] | 1996 | CXXNullPtrLiteralExpr Null(Context.VoidPtrTy, SourceLocation()); |
| 1997 | Expr* DeallocArgs[1]; |
| 1998 | DeallocArgs[0] = &Null; |
| 1999 | if (FindAllocationOverload(StartLoc, SourceRange(), Name, |
Sean Hunt | 2be7e90 | 2011-05-12 22:46:29 +0000 | [diff] [blame] | 2000 | DeallocArgs, 1, TUDecl, !Diagnose, |
| 2001 | Operator, Diagnose)) |
Anders Carlsson | 78f7455 | 2009-11-15 18:45:20 +0000 | [diff] [blame] | 2002 | return true; |
| 2003 | |
| 2004 | assert(Operator && "Did not find a deallocation function!"); |
| 2005 | return false; |
| 2006 | } |
| 2007 | |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 2008 | /// ActOnCXXDelete - Parsed a C++ 'delete' expression (C++ 5.3.5), as in: |
| 2009 | /// @code ::delete ptr; @endcode |
| 2010 | /// or |
| 2011 | /// @code delete [] ptr; @endcode |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 2012 | ExprResult |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 2013 | Sema::ActOnCXXDelete(SourceLocation StartLoc, bool UseGlobal, |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2014 | bool ArrayForm, Expr *ExE) { |
Douglas Gregor | 9cd9f3f | 2009-09-09 23:39:55 +0000 | [diff] [blame] | 2015 | // C++ [expr.delete]p1: |
| 2016 | // The operand shall have a pointer type, or a class type having a single |
| 2017 | // conversion function to a pointer type. The result has type void. |
| 2018 | // |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 2019 | // DR599 amends "pointer type" to "pointer to object type" in both cases. |
| 2020 | |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2021 | ExprResult Ex = Owned(ExE); |
Anders Carlsson | d67c4c3 | 2009-08-16 20:29:29 +0000 | [diff] [blame] | 2022 | FunctionDecl *OperatorDelete = 0; |
Argyrios Kyrtzidis | 4076dac | 2010-09-13 20:15:54 +0000 | [diff] [blame] | 2023 | bool ArrayFormAsWritten = ArrayForm; |
John McCall | 6ec278d | 2011-01-27 09:37:56 +0000 | [diff] [blame] | 2024 | bool UsualArrayDeleteWantsSize = false; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2025 | |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2026 | if (!Ex.get()->isTypeDependent()) { |
John McCall | 5aba3eb | 2012-03-09 04:08:29 +0000 | [diff] [blame] | 2027 | // Perform lvalue-to-rvalue cast, if needed. |
| 2028 | Ex = DefaultLvalueConversion(Ex.take()); |
Eli Friedman | 206491d | 2012-12-13 00:37:17 +0000 | [diff] [blame] | 2029 | if (Ex.isInvalid()) |
| 2030 | return ExprError(); |
John McCall | 5aba3eb | 2012-03-09 04:08:29 +0000 | [diff] [blame] | 2031 | |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2032 | QualType Type = Ex.get()->getType(); |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 2033 | |
Douglas Gregor | 9cd9f3f | 2009-09-09 23:39:55 +0000 | [diff] [blame] | 2034 | if (const RecordType *Record = Type->getAs<RecordType>()) { |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2035 | if (RequireCompleteType(StartLoc, Type, |
Douglas Gregor | d10099e | 2012-05-04 16:32:21 +0000 | [diff] [blame] | 2036 | diag::err_delete_incomplete_class_type)) |
Douglas Gregor | 254a942 | 2010-07-29 14:44:35 +0000 | [diff] [blame] | 2037 | return ExprError(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2038 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 2039 | SmallVector<CXXConversionDecl*, 4> ObjectPtrConversions; |
John McCall | 32daa42 | 2010-03-31 01:36:47 +0000 | [diff] [blame] | 2040 | |
Fariborz Jahanian | 5346278 | 2009-09-11 21:44:33 +0000 | [diff] [blame] | 2041 | CXXRecordDecl *RD = cast<CXXRecordDecl>(Record->getDecl()); |
Argyrios Kyrtzidis | 9d29543 | 2012-11-28 03:56:09 +0000 | [diff] [blame] | 2042 | std::pair<CXXRecordDecl::conversion_iterator, |
| 2043 | CXXRecordDecl::conversion_iterator> |
| 2044 | Conversions = RD->getVisibleConversionFunctions(); |
| 2045 | for (CXXRecordDecl::conversion_iterator |
| 2046 | I = Conversions.first, E = Conversions.second; I != E; ++I) { |
John McCall | 32daa42 | 2010-03-31 01:36:47 +0000 | [diff] [blame] | 2047 | NamedDecl *D = I.getDecl(); |
| 2048 | if (isa<UsingShadowDecl>(D)) |
| 2049 | D = cast<UsingShadowDecl>(D)->getTargetDecl(); |
| 2050 | |
Douglas Gregor | 9cd9f3f | 2009-09-09 23:39:55 +0000 | [diff] [blame] | 2051 | // Skip over templated conversion functions; they aren't considered. |
John McCall | 32daa42 | 2010-03-31 01:36:47 +0000 | [diff] [blame] | 2052 | if (isa<FunctionTemplateDecl>(D)) |
Douglas Gregor | 9cd9f3f | 2009-09-09 23:39:55 +0000 | [diff] [blame] | 2053 | continue; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2054 | |
John McCall | 32daa42 | 2010-03-31 01:36:47 +0000 | [diff] [blame] | 2055 | CXXConversionDecl *Conv = cast<CXXConversionDecl>(D); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2056 | |
Douglas Gregor | 9cd9f3f | 2009-09-09 23:39:55 +0000 | [diff] [blame] | 2057 | QualType ConvType = Conv->getConversionType().getNonReferenceType(); |
| 2058 | if (const PointerType *ConvPtrType = ConvType->getAs<PointerType>()) |
Eli Friedman | 1357869 | 2010-08-05 02:49:48 +0000 | [diff] [blame] | 2059 | if (ConvPtrType->getPointeeType()->isIncompleteOrObjectType()) |
Fariborz Jahanian | 8b915e7 | 2009-09-15 22:15:23 +0000 | [diff] [blame] | 2060 | ObjectPtrConversions.push_back(Conv); |
Douglas Gregor | 9cd9f3f | 2009-09-09 23:39:55 +0000 | [diff] [blame] | 2061 | } |
Fariborz Jahanian | 8b915e7 | 2009-09-15 22:15:23 +0000 | [diff] [blame] | 2062 | if (ObjectPtrConversions.size() == 1) { |
| 2063 | // We have a single conversion to a pointer-to-object type. Perform |
| 2064 | // that conversion. |
John McCall | 32daa42 | 2010-03-31 01:36:47 +0000 | [diff] [blame] | 2065 | // TODO: don't redo the conversion calculation. |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2066 | ExprResult Res = |
| 2067 | PerformImplicitConversion(Ex.get(), |
John McCall | 32daa42 | 2010-03-31 01:36:47 +0000 | [diff] [blame] | 2068 | ObjectPtrConversions.front()->getConversionType(), |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2069 | AA_Converting); |
| 2070 | if (Res.isUsable()) { |
Benjamin Kramer | 3fe198b | 2012-08-23 21:35:17 +0000 | [diff] [blame] | 2071 | Ex = Res; |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2072 | Type = Ex.get()->getType(); |
Fariborz Jahanian | 8b915e7 | 2009-09-15 22:15:23 +0000 | [diff] [blame] | 2073 | } |
| 2074 | } |
| 2075 | else if (ObjectPtrConversions.size() > 1) { |
| 2076 | Diag(StartLoc, diag::err_ambiguous_delete_operand) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2077 | << Type << Ex.get()->getSourceRange(); |
John McCall | 32daa42 | 2010-03-31 01:36:47 +0000 | [diff] [blame] | 2078 | for (unsigned i= 0; i < ObjectPtrConversions.size(); i++) |
| 2079 | NoteOverloadCandidate(ObjectPtrConversions[i]); |
Fariborz Jahanian | 8b915e7 | 2009-09-15 22:15:23 +0000 | [diff] [blame] | 2080 | return ExprError(); |
Douglas Gregor | 9cd9f3f | 2009-09-09 23:39:55 +0000 | [diff] [blame] | 2081 | } |
Sebastian Redl | 2850784 | 2009-02-26 14:39:58 +0000 | [diff] [blame] | 2082 | } |
| 2083 | |
Sebastian Redl | f53597f | 2009-03-15 17:47:39 +0000 | [diff] [blame] | 2084 | if (!Type->isPointerType()) |
| 2085 | return ExprError(Diag(StartLoc, diag::err_delete_operand) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2086 | << Type << Ex.get()->getSourceRange()); |
Sebastian Redl | 2850784 | 2009-02-26 14:39:58 +0000 | [diff] [blame] | 2087 | |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 2088 | QualType Pointee = Type->getAs<PointerType>()->getPointeeType(); |
Eli Friedman | e52c914 | 2011-07-26 22:25:31 +0000 | [diff] [blame] | 2089 | QualType PointeeElem = Context.getBaseElementType(Pointee); |
| 2090 | |
| 2091 | if (unsigned AddressSpace = Pointee.getAddressSpace()) |
| 2092 | return Diag(Ex.get()->getLocStart(), |
| 2093 | diag::err_address_space_qualified_delete) |
| 2094 | << Pointee.getUnqualifiedType() << AddressSpace; |
| 2095 | |
| 2096 | CXXRecordDecl *PointeeRD = 0; |
Douglas Gregor | 94a6157 | 2010-05-24 17:01:56 +0000 | [diff] [blame] | 2097 | if (Pointee->isVoidType() && !isSFINAEContext()) { |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2098 | // The C++ standard bans deleting a pointer to a non-object type, which |
Douglas Gregor | 94a6157 | 2010-05-24 17:01:56 +0000 | [diff] [blame] | 2099 | // effectively bans deletion of "void*". However, most compilers support |
| 2100 | // this, so we treat it as a warning unless we're in a SFINAE context. |
| 2101 | Diag(StartLoc, diag::ext_delete_void_ptr_operand) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2102 | << Type << Ex.get()->getSourceRange(); |
Eli Friedman | e52c914 | 2011-07-26 22:25:31 +0000 | [diff] [blame] | 2103 | } else if (Pointee->isFunctionType() || Pointee->isVoidType()) { |
Sebastian Redl | f53597f | 2009-03-15 17:47:39 +0000 | [diff] [blame] | 2104 | return ExprError(Diag(StartLoc, diag::err_delete_operand) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2105 | << Type << Ex.get()->getSourceRange()); |
Eli Friedman | e52c914 | 2011-07-26 22:25:31 +0000 | [diff] [blame] | 2106 | } else if (!Pointee->isDependentType()) { |
| 2107 | if (!RequireCompleteType(StartLoc, Pointee, |
Douglas Gregor | d10099e | 2012-05-04 16:32:21 +0000 | [diff] [blame] | 2108 | diag::warn_delete_incomplete, Ex.get())) { |
Eli Friedman | e52c914 | 2011-07-26 22:25:31 +0000 | [diff] [blame] | 2109 | if (const RecordType *RT = PointeeElem->getAs<RecordType>()) |
| 2110 | PointeeRD = cast<CXXRecordDecl>(RT->getDecl()); |
| 2111 | } |
| 2112 | } |
| 2113 | |
Douglas Gregor | 1070c9f | 2009-09-29 21:38:53 +0000 | [diff] [blame] | 2114 | // C++ [expr.delete]p2: |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2115 | // [Note: a pointer to a const type can be the operand of a |
| 2116 | // delete-expression; it is not necessary to cast away the constness |
| 2117 | // (5.2.11) of the pointer expression before it is used as the operand |
Douglas Gregor | 1070c9f | 2009-09-29 21:38:53 +0000 | [diff] [blame] | 2118 | // of the delete-expression. ] |
Argyrios Kyrtzidis | 4076dac | 2010-09-13 20:15:54 +0000 | [diff] [blame] | 2119 | |
| 2120 | if (Pointee->isArrayType() && !ArrayForm) { |
| 2121 | Diag(StartLoc, diag::warn_delete_array_type) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2122 | << Type << Ex.get()->getSourceRange() |
Argyrios Kyrtzidis | 4076dac | 2010-09-13 20:15:54 +0000 | [diff] [blame] | 2123 | << FixItHint::CreateInsertion(PP.getLocForEndOfToken(StartLoc), "[]"); |
| 2124 | ArrayForm = true; |
| 2125 | } |
| 2126 | |
Anders Carlsson | d67c4c3 | 2009-08-16 20:29:29 +0000 | [diff] [blame] | 2127 | DeclarationName DeleteName = Context.DeclarationNames.getCXXOperatorName( |
| 2128 | ArrayForm ? OO_Array_Delete : OO_Delete); |
| 2129 | |
Eli Friedman | e52c914 | 2011-07-26 22:25:31 +0000 | [diff] [blame] | 2130 | if (PointeeRD) { |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2131 | if (!UseGlobal && |
Eli Friedman | e52c914 | 2011-07-26 22:25:31 +0000 | [diff] [blame] | 2132 | FindDeallocationFunction(StartLoc, PointeeRD, DeleteName, |
| 2133 | OperatorDelete)) |
Anders Carlsson | 0ba63ea | 2009-11-14 03:17:38 +0000 | [diff] [blame] | 2134 | return ExprError(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2135 | |
John McCall | 6ec278d | 2011-01-27 09:37:56 +0000 | [diff] [blame] | 2136 | // If we're allocating an array of records, check whether the |
| 2137 | // usual operator delete[] has a size_t parameter. |
| 2138 | if (ArrayForm) { |
| 2139 | // If the user specifically asked to use the global allocator, |
| 2140 | // we'll need to do the lookup into the class. |
| 2141 | if (UseGlobal) |
| 2142 | UsualArrayDeleteWantsSize = |
| 2143 | doesUsualArrayDeleteWantSize(*this, StartLoc, PointeeElem); |
| 2144 | |
| 2145 | // Otherwise, the usual operator delete[] should be the |
| 2146 | // function we just found. |
| 2147 | else if (isa<CXXMethodDecl>(OperatorDelete)) |
| 2148 | UsualArrayDeleteWantsSize = (OperatorDelete->getNumParams() == 2); |
| 2149 | } |
| 2150 | |
Richard Smith | 213d70b | 2012-02-18 04:13:32 +0000 | [diff] [blame] | 2151 | if (!PointeeRD->hasIrrelevantDestructor()) |
Eli Friedman | e52c914 | 2011-07-26 22:25:31 +0000 | [diff] [blame] | 2152 | if (CXXDestructorDecl *Dtor = LookupDestructor(PointeeRD)) { |
Eli Friedman | 5f2987c | 2012-02-02 03:46:19 +0000 | [diff] [blame] | 2153 | MarkFunctionReferenced(StartLoc, |
Fariborz Jahanian | 34374e6 | 2009-09-03 23:18:17 +0000 | [diff] [blame] | 2154 | const_cast<CXXDestructorDecl*>(Dtor)); |
Douglas Gregor | 9b62363 | 2010-10-12 23:32:35 +0000 | [diff] [blame] | 2155 | DiagnoseUseOfDecl(Dtor, StartLoc); |
| 2156 | } |
Argyrios Kyrtzidis | 6f0074a | 2011-05-24 19:53:26 +0000 | [diff] [blame] | 2157 | |
| 2158 | // C++ [expr.delete]p3: |
| 2159 | // In the first alternative (delete object), if the static type of the |
| 2160 | // object to be deleted is different from its dynamic type, the static |
| 2161 | // type shall be a base class of the dynamic type of the object to be |
| 2162 | // deleted and the static type shall have a virtual destructor or the |
| 2163 | // behavior is undefined. |
| 2164 | // |
| 2165 | // Note: a final class cannot be derived from, no issue there |
Eli Friedman | ef8c79c | 2011-07-26 23:27:24 +0000 | [diff] [blame] | 2166 | if (PointeeRD->isPolymorphic() && !PointeeRD->hasAttr<FinalAttr>()) { |
Eli Friedman | e52c914 | 2011-07-26 22:25:31 +0000 | [diff] [blame] | 2167 | CXXDestructorDecl *dtor = PointeeRD->getDestructor(); |
Eli Friedman | ef8c79c | 2011-07-26 23:27:24 +0000 | [diff] [blame] | 2168 | if (dtor && !dtor->isVirtual()) { |
| 2169 | if (PointeeRD->isAbstract()) { |
| 2170 | // If the class is abstract, we warn by default, because we're |
| 2171 | // sure the code has undefined behavior. |
| 2172 | Diag(StartLoc, diag::warn_delete_abstract_non_virtual_dtor) |
| 2173 | << PointeeElem; |
| 2174 | } else if (!ArrayForm) { |
| 2175 | // Otherwise, if this is not an array delete, it's a bit suspect, |
| 2176 | // but not necessarily wrong. |
| 2177 | Diag(StartLoc, diag::warn_delete_non_virtual_dtor) << PointeeElem; |
| 2178 | } |
| 2179 | } |
Argyrios Kyrtzidis | 6f0074a | 2011-05-24 19:53:26 +0000 | [diff] [blame] | 2180 | } |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2181 | |
Anders Carlsson | d67c4c3 | 2009-08-16 20:29:29 +0000 | [diff] [blame] | 2182 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2183 | |
Anders Carlsson | d67c4c3 | 2009-08-16 20:29:29 +0000 | [diff] [blame] | 2184 | if (!OperatorDelete) { |
Anders Carlsson | 78f7455 | 2009-11-15 18:45:20 +0000 | [diff] [blame] | 2185 | // Look for a global declaration. |
Anders Carlsson | d67c4c3 | 2009-08-16 20:29:29 +0000 | [diff] [blame] | 2186 | DeclareGlobalNewDelete(); |
| 2187 | DeclContext *TUDecl = Context.getTranslationUnitDecl(); |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2188 | Expr *Arg = Ex.get(); |
Abramo Bagnara | 34f60a4 | 2012-07-09 21:15:43 +0000 | [diff] [blame] | 2189 | if (!Context.hasSameType(Arg->getType(), Context.VoidPtrTy)) |
| 2190 | Arg = ImplicitCastExpr::Create(Context, Context.VoidPtrTy, |
| 2191 | CK_BitCast, Arg, 0, VK_RValue); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2192 | if (FindAllocationOverload(StartLoc, SourceRange(), DeleteName, |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2193 | &Arg, 1, TUDecl, /*AllowMissing=*/false, |
Anders Carlsson | d67c4c3 | 2009-08-16 20:29:29 +0000 | [diff] [blame] | 2194 | OperatorDelete)) |
| 2195 | return ExprError(); |
| 2196 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2197 | |
Eli Friedman | 5f2987c | 2012-02-02 03:46:19 +0000 | [diff] [blame] | 2198 | MarkFunctionReferenced(StartLoc, OperatorDelete); |
John McCall | 6ec278d | 2011-01-27 09:37:56 +0000 | [diff] [blame] | 2199 | |
Douglas Gregor | d880f52 | 2011-02-01 15:50:11 +0000 | [diff] [blame] | 2200 | // Check access and ambiguity of operator delete and destructor. |
Eli Friedman | e52c914 | 2011-07-26 22:25:31 +0000 | [diff] [blame] | 2201 | if (PointeeRD) { |
| 2202 | if (CXXDestructorDecl *Dtor = LookupDestructor(PointeeRD)) { |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2203 | CheckDestructorAccess(Ex.get()->getExprLoc(), Dtor, |
Douglas Gregor | d880f52 | 2011-02-01 15:50:11 +0000 | [diff] [blame] | 2204 | PDiag(diag::err_access_dtor) << PointeeElem); |
| 2205 | } |
| 2206 | } |
| 2207 | |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 2208 | } |
| 2209 | |
Sebastian Redl | f53597f | 2009-03-15 17:47:39 +0000 | [diff] [blame] | 2210 | return Owned(new (Context) CXXDeleteExpr(Context.VoidTy, UseGlobal, ArrayForm, |
John McCall | 6ec278d | 2011-01-27 09:37:56 +0000 | [diff] [blame] | 2211 | ArrayFormAsWritten, |
| 2212 | UsualArrayDeleteWantsSize, |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2213 | OperatorDelete, Ex.take(), StartLoc)); |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 2214 | } |
| 2215 | |
Douglas Gregor | 8cfe5a7 | 2009-11-23 23:44:04 +0000 | [diff] [blame] | 2216 | /// \brief Check the use of the given variable as a C++ condition in an if, |
| 2217 | /// while, do-while, or switch statement. |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 2218 | ExprResult Sema::CheckConditionVariable(VarDecl *ConditionVar, |
John McCall | f89e55a | 2010-11-18 06:31:45 +0000 | [diff] [blame] | 2219 | SourceLocation StmtLoc, |
| 2220 | bool ConvertToBoolean) { |
Douglas Gregor | 8cfe5a7 | 2009-11-23 23:44:04 +0000 | [diff] [blame] | 2221 | QualType T = ConditionVar->getType(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2222 | |
Douglas Gregor | 8cfe5a7 | 2009-11-23 23:44:04 +0000 | [diff] [blame] | 2223 | // C++ [stmt.select]p2: |
| 2224 | // The declarator shall not specify a function or an array. |
| 2225 | if (T->isFunctionType()) |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2226 | return ExprError(Diag(ConditionVar->getLocation(), |
Douglas Gregor | 8cfe5a7 | 2009-11-23 23:44:04 +0000 | [diff] [blame] | 2227 | diag::err_invalid_use_of_function_type) |
| 2228 | << ConditionVar->getSourceRange()); |
| 2229 | else if (T->isArrayType()) |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2230 | return ExprError(Diag(ConditionVar->getLocation(), |
Douglas Gregor | 8cfe5a7 | 2009-11-23 23:44:04 +0000 | [diff] [blame] | 2231 | diag::err_invalid_use_of_array_type) |
| 2232 | << ConditionVar->getSourceRange()); |
Douglas Gregor | a7605db | 2009-11-24 16:07:02 +0000 | [diff] [blame] | 2233 | |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2234 | ExprResult Condition = |
Abramo Bagnara | e4b9276 | 2012-01-27 09:46:47 +0000 | [diff] [blame] | 2235 | Owned(DeclRefExpr::Create(Context, NestedNameSpecifierLoc(), |
| 2236 | SourceLocation(), |
| 2237 | ConditionVar, |
John McCall | f4b88a4 | 2012-03-10 09:33:50 +0000 | [diff] [blame] | 2238 | /*enclosing*/ false, |
Abramo Bagnara | e4b9276 | 2012-01-27 09:46:47 +0000 | [diff] [blame] | 2239 | ConditionVar->getLocation(), |
| 2240 | ConditionVar->getType().getNonReferenceType(), |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2241 | VK_LValue)); |
Eli Friedman | cf7c14c | 2012-01-16 21:00:51 +0000 | [diff] [blame] | 2242 | |
Eli Friedman | 5f2987c | 2012-02-02 03:46:19 +0000 | [diff] [blame] | 2243 | MarkDeclRefReferenced(cast<DeclRefExpr>(Condition.get())); |
Eli Friedman | cf7c14c | 2012-01-16 21:00:51 +0000 | [diff] [blame] | 2244 | |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2245 | if (ConvertToBoolean) { |
| 2246 | Condition = CheckBooleanCondition(Condition.take(), StmtLoc); |
| 2247 | if (Condition.isInvalid()) |
| 2248 | return ExprError(); |
| 2249 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2250 | |
Benjamin Kramer | 3fe198b | 2012-08-23 21:35:17 +0000 | [diff] [blame] | 2251 | return Condition; |
Douglas Gregor | 8cfe5a7 | 2009-11-23 23:44:04 +0000 | [diff] [blame] | 2252 | } |
| 2253 | |
Argyrios Kyrtzidis | 5921093 | 2008-09-10 02:17:11 +0000 | [diff] [blame] | 2254 | /// CheckCXXBooleanCondition - Returns true if a conversion to bool is invalid. |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2255 | ExprResult Sema::CheckCXXBooleanCondition(Expr *CondExpr) { |
Argyrios Kyrtzidis | 5921093 | 2008-09-10 02:17:11 +0000 | [diff] [blame] | 2256 | // C++ 6.4p4: |
| 2257 | // The value of a condition that is an initialized declaration in a statement |
| 2258 | // other than a switch statement is the value of the declared variable |
| 2259 | // implicitly converted to type bool. If that conversion is ill-formed, the |
| 2260 | // program is ill-formed. |
| 2261 | // The value of a condition that is an expression is the value of the |
| 2262 | // expression, implicitly converted to bool. |
| 2263 | // |
Douglas Gregor | 09f41cf | 2009-01-14 15:45:31 +0000 | [diff] [blame] | 2264 | return PerformContextuallyConvertToBool(CondExpr); |
Argyrios Kyrtzidis | 5921093 | 2008-09-10 02:17:11 +0000 | [diff] [blame] | 2265 | } |
Douglas Gregor | 77a5223 | 2008-09-12 00:47:35 +0000 | [diff] [blame] | 2266 | |
| 2267 | /// Helper function to determine whether this is the (deprecated) C++ |
| 2268 | /// conversion from a string literal to a pointer to non-const char or |
| 2269 | /// non-const wchar_t (for narrow and wide string literals, |
| 2270 | /// respectively). |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2271 | bool |
Douglas Gregor | 77a5223 | 2008-09-12 00:47:35 +0000 | [diff] [blame] | 2272 | Sema::IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType) { |
| 2273 | // Look inside the implicit cast, if it exists. |
| 2274 | if (ImplicitCastExpr *Cast = dyn_cast<ImplicitCastExpr>(From)) |
| 2275 | From = Cast->getSubExpr(); |
| 2276 | |
| 2277 | // A string literal (2.13.4) that is not a wide string literal can |
| 2278 | // be converted to an rvalue of type "pointer to char"; a wide |
| 2279 | // string literal can be converted to an rvalue of type "pointer |
| 2280 | // to wchar_t" (C++ 4.2p2). |
Douglas Gregor | 1984eb9 | 2010-06-22 23:47:37 +0000 | [diff] [blame] | 2281 | if (StringLiteral *StrLit = dyn_cast<StringLiteral>(From->IgnoreParens())) |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 2282 | if (const PointerType *ToPtrType = ToType->getAs<PointerType>()) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2283 | if (const BuiltinType *ToPointeeType |
John McCall | 183700f | 2009-09-21 23:43:11 +0000 | [diff] [blame] | 2284 | = ToPtrType->getPointeeType()->getAs<BuiltinType>()) { |
Douglas Gregor | 77a5223 | 2008-09-12 00:47:35 +0000 | [diff] [blame] | 2285 | // This conversion is considered only when there is an |
| 2286 | // explicit appropriate pointer target type (C++ 4.2p2). |
Douglas Gregor | 5cee119 | 2011-07-27 05:40:30 +0000 | [diff] [blame] | 2287 | if (!ToPtrType->getPointeeType().hasQualifiers()) { |
| 2288 | switch (StrLit->getKind()) { |
| 2289 | case StringLiteral::UTF8: |
| 2290 | case StringLiteral::UTF16: |
| 2291 | case StringLiteral::UTF32: |
| 2292 | // We don't allow UTF literals to be implicitly converted |
| 2293 | break; |
| 2294 | case StringLiteral::Ascii: |
| 2295 | return (ToPointeeType->getKind() == BuiltinType::Char_U || |
| 2296 | ToPointeeType->getKind() == BuiltinType::Char_S); |
| 2297 | case StringLiteral::Wide: |
| 2298 | return ToPointeeType->isWideCharType(); |
| 2299 | } |
| 2300 | } |
Douglas Gregor | 77a5223 | 2008-09-12 00:47:35 +0000 | [diff] [blame] | 2301 | } |
| 2302 | |
| 2303 | return false; |
| 2304 | } |
Douglas Gregor | 94b1dd2 | 2008-10-24 04:54:22 +0000 | [diff] [blame] | 2305 | |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2306 | static ExprResult BuildCXXCastArgument(Sema &S, |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2307 | SourceLocation CastLoc, |
| 2308 | QualType Ty, |
| 2309 | CastKind Kind, |
| 2310 | CXXMethodDecl *Method, |
John McCall | ca82a82 | 2011-09-21 08:36:56 +0000 | [diff] [blame] | 2311 | DeclAccessPair FoundDecl, |
Abramo Bagnara | 7cc58b4 | 2011-10-05 07:56:41 +0000 | [diff] [blame] | 2312 | bool HadMultipleCandidates, |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2313 | Expr *From) { |
Douglas Gregor | ba70ab6 | 2010-04-16 22:17:36 +0000 | [diff] [blame] | 2314 | switch (Kind) { |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 2315 | default: llvm_unreachable("Unhandled cast kind!"); |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2316 | case CK_ConstructorConversion: { |
Douglas Gregor | 13e1bca | 2011-10-10 22:41:00 +0000 | [diff] [blame] | 2317 | CXXConstructorDecl *Constructor = cast<CXXConstructorDecl>(Method); |
Benjamin Kramer | 4e28d9e | 2012-08-23 22:51:59 +0000 | [diff] [blame] | 2318 | SmallVector<Expr*, 8> ConstructorArgs; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2319 | |
Benjamin Kramer | 5354e77 | 2012-08-23 23:38:35 +0000 | [diff] [blame] | 2320 | if (S.CompleteConstructorCall(Constructor, From, CastLoc, ConstructorArgs)) |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 2321 | return ExprError(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2322 | |
John McCall | b9abd872 | 2012-04-07 03:04:20 +0000 | [diff] [blame] | 2323 | S.CheckConstructorAccess(CastLoc, Constructor, |
| 2324 | InitializedEntity::InitializeTemporary(Ty), |
| 2325 | Constructor->getAccess()); |
Richard Smith | c83c230 | 2012-12-19 01:39:02 +0000 | [diff] [blame] | 2326 | |
Douglas Gregor | 13e1bca | 2011-10-10 22:41:00 +0000 | [diff] [blame] | 2327 | ExprResult Result |
| 2328 | = S.BuildCXXConstructExpr(CastLoc, Ty, cast<CXXConstructorDecl>(Method), |
Richard Smith | c83c230 | 2012-12-19 01:39:02 +0000 | [diff] [blame] | 2329 | ConstructorArgs, HadMultipleCandidates, |
| 2330 | /*ListInit*/ false, /*ZeroInit*/ false, |
Douglas Gregor | 13e1bca | 2011-10-10 22:41:00 +0000 | [diff] [blame] | 2331 | CXXConstructExpr::CK_Complete, SourceRange()); |
Douglas Gregor | ba70ab6 | 2010-04-16 22:17:36 +0000 | [diff] [blame] | 2332 | if (Result.isInvalid()) |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 2333 | return ExprError(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2334 | |
Douglas Gregor | ba70ab6 | 2010-04-16 22:17:36 +0000 | [diff] [blame] | 2335 | return S.MaybeBindToTemporary(Result.takeAs<Expr>()); |
| 2336 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2337 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2338 | case CK_UserDefinedConversion: { |
Douglas Gregor | ba70ab6 | 2010-04-16 22:17:36 +0000 | [diff] [blame] | 2339 | assert(!From->getType()->isPointerType() && "Arg can't have pointer type!"); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2340 | |
Douglas Gregor | ba70ab6 | 2010-04-16 22:17:36 +0000 | [diff] [blame] | 2341 | // Create an implicit call expr that calls it. |
Eli Friedman | 3f01c8a | 2012-03-01 01:30:04 +0000 | [diff] [blame] | 2342 | CXXConversionDecl *Conv = cast<CXXConversionDecl>(Method); |
| 2343 | ExprResult Result = S.BuildCXXMemberCallExpr(From, FoundDecl, Conv, |
Abramo Bagnara | 7cc58b4 | 2011-10-05 07:56:41 +0000 | [diff] [blame] | 2344 | HadMultipleCandidates); |
Douglas Gregor | f2ae526 | 2011-01-20 00:18:04 +0000 | [diff] [blame] | 2345 | if (Result.isInvalid()) |
| 2346 | return ExprError(); |
Abramo Bagnara | 960809e | 2011-11-16 22:46:05 +0000 | [diff] [blame] | 2347 | // Record usage of conversion in an implicit cast. |
| 2348 | Result = S.Owned(ImplicitCastExpr::Create(S.Context, |
| 2349 | Result.get()->getType(), |
| 2350 | CK_UserDefinedConversion, |
| 2351 | Result.get(), 0, |
| 2352 | Result.get()->getValueKind())); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2353 | |
John McCall | ca82a82 | 2011-09-21 08:36:56 +0000 | [diff] [blame] | 2354 | S.CheckMemberOperatorAccess(CastLoc, From, /*arg*/ 0, FoundDecl); |
| 2355 | |
Douglas Gregor | f2ae526 | 2011-01-20 00:18:04 +0000 | [diff] [blame] | 2356 | return S.MaybeBindToTemporary(Result.get()); |
Douglas Gregor | ba70ab6 | 2010-04-16 22:17:36 +0000 | [diff] [blame] | 2357 | } |
| 2358 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2359 | } |
Douglas Gregor | ba70ab6 | 2010-04-16 22:17:36 +0000 | [diff] [blame] | 2360 | |
Douglas Gregor | 09f41cf | 2009-01-14 15:45:31 +0000 | [diff] [blame] | 2361 | /// PerformImplicitConversion - Perform an implicit conversion of the |
| 2362 | /// expression From to the type ToType using the pre-computed implicit |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2363 | /// conversion sequence ICS. Returns the converted |
Douglas Gregor | 6864748 | 2009-12-16 03:45:30 +0000 | [diff] [blame] | 2364 | /// expression. Action is the kind of conversion we're performing, |
Douglas Gregor | 09f41cf | 2009-01-14 15:45:31 +0000 | [diff] [blame] | 2365 | /// used in the error message. |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2366 | ExprResult |
| 2367 | Sema::PerformImplicitConversion(Expr *From, QualType ToType, |
Douglas Gregor | 09f41cf | 2009-01-14 15:45:31 +0000 | [diff] [blame] | 2368 | const ImplicitConversionSequence &ICS, |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2369 | AssignmentAction Action, |
| 2370 | CheckedConversionKind CCK) { |
John McCall | 1d31833 | 2010-01-12 00:44:57 +0000 | [diff] [blame] | 2371 | switch (ICS.getKind()) { |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2372 | case ImplicitConversionSequence::StandardConversion: { |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 2373 | ExprResult Res = PerformImplicitConversion(From, ToType, ICS.Standard, |
| 2374 | Action, CCK); |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2375 | if (Res.isInvalid()) |
| 2376 | return ExprError(); |
| 2377 | From = Res.take(); |
Douglas Gregor | 94b1dd2 | 2008-10-24 04:54:22 +0000 | [diff] [blame] | 2378 | break; |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2379 | } |
Douglas Gregor | 94b1dd2 | 2008-10-24 04:54:22 +0000 | [diff] [blame] | 2380 | |
Anders Carlsson | f6c213a | 2009-09-15 06:28:28 +0000 | [diff] [blame] | 2381 | case ImplicitConversionSequence::UserDefinedConversion: { |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2382 | |
Fariborz Jahanian | 7fe5d72 | 2009-08-28 22:04:50 +0000 | [diff] [blame] | 2383 | FunctionDecl *FD = ICS.UserDefined.ConversionFunction; |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 2384 | CastKind CastKind; |
Anders Carlsson | f6c213a | 2009-09-15 06:28:28 +0000 | [diff] [blame] | 2385 | QualType BeforeToType; |
Sebastian Redl | cc7a648 | 2011-11-01 15:53:09 +0000 | [diff] [blame] | 2386 | assert(FD && "FIXME: aggregate initialization from init list"); |
Anders Carlsson | f6c213a | 2009-09-15 06:28:28 +0000 | [diff] [blame] | 2387 | if (const CXXConversionDecl *Conv = dyn_cast<CXXConversionDecl>(FD)) { |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2388 | CastKind = CK_UserDefinedConversion; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2389 | |
Anders Carlsson | f6c213a | 2009-09-15 06:28:28 +0000 | [diff] [blame] | 2390 | // If the user-defined conversion is specified by a conversion function, |
| 2391 | // the initial standard conversion sequence converts the source type to |
| 2392 | // the implicit object parameter of the conversion function. |
| 2393 | BeforeToType = Context.getTagDeclType(Conv->getParent()); |
John McCall | 9ec9445 | 2010-12-04 09:57:16 +0000 | [diff] [blame] | 2394 | } else { |
| 2395 | const CXXConstructorDecl *Ctor = cast<CXXConstructorDecl>(FD); |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2396 | CastKind = CK_ConstructorConversion; |
Fariborz Jahanian | 966256a | 2009-11-06 00:23:08 +0000 | [diff] [blame] | 2397 | // Do no conversion if dealing with ... for the first conversion. |
Douglas Gregor | e44201a | 2009-11-20 02:31:03 +0000 | [diff] [blame] | 2398 | if (!ICS.UserDefined.EllipsisConversion) { |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2399 | // If the user-defined conversion is specified by a constructor, the |
Fariborz Jahanian | 966256a | 2009-11-06 00:23:08 +0000 | [diff] [blame] | 2400 | // initial standard conversion sequence converts the source type to the |
| 2401 | // type required by the argument of the constructor |
Douglas Gregor | e44201a | 2009-11-20 02:31:03 +0000 | [diff] [blame] | 2402 | BeforeToType = Ctor->getParamDecl(0)->getType().getNonReferenceType(); |
| 2403 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2404 | } |
Douglas Gregor | a3998bd | 2010-12-02 21:47:04 +0000 | [diff] [blame] | 2405 | // Watch out for elipsis conversion. |
Fariborz Jahanian | 4c0cea2 | 2009-11-06 00:55:14 +0000 | [diff] [blame] | 2406 | if (!ICS.UserDefined.EllipsisConversion) { |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2407 | ExprResult Res = |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 2408 | PerformImplicitConversion(From, BeforeToType, |
| 2409 | ICS.UserDefined.Before, AA_Converting, |
| 2410 | CCK); |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2411 | if (Res.isInvalid()) |
| 2412 | return ExprError(); |
| 2413 | From = Res.take(); |
Fariborz Jahanian | 966256a | 2009-11-06 00:23:08 +0000 | [diff] [blame] | 2414 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2415 | |
| 2416 | ExprResult CastArg |
Douglas Gregor | ba70ab6 | 2010-04-16 22:17:36 +0000 | [diff] [blame] | 2417 | = BuildCXXCastArgument(*this, |
| 2418 | From->getLocStart(), |
Anders Carlsson | 0aebc81 | 2009-09-09 21:33:21 +0000 | [diff] [blame] | 2419 | ToType.getNonReferenceType(), |
Douglas Gregor | 83eecbe | 2011-01-20 01:32:05 +0000 | [diff] [blame] | 2420 | CastKind, cast<CXXMethodDecl>(FD), |
| 2421 | ICS.UserDefined.FoundConversionFunction, |
Abramo Bagnara | 7cc58b4 | 2011-10-05 07:56:41 +0000 | [diff] [blame] | 2422 | ICS.UserDefined.HadMultipleCandidates, |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 2423 | From); |
Anders Carlsson | 0aebc81 | 2009-09-09 21:33:21 +0000 | [diff] [blame] | 2424 | |
| 2425 | if (CastArg.isInvalid()) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2426 | return ExprError(); |
Eli Friedman | d888962 | 2009-11-27 04:41:50 +0000 | [diff] [blame] | 2427 | |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2428 | From = CastArg.take(); |
Eli Friedman | d888962 | 2009-11-27 04:41:50 +0000 | [diff] [blame] | 2429 | |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 2430 | return PerformImplicitConversion(From, ToType, ICS.UserDefined.After, |
| 2431 | AA_Converting, CCK); |
Fariborz Jahanian | 93034ca | 2009-10-16 19:20:59 +0000 | [diff] [blame] | 2432 | } |
John McCall | 1d31833 | 2010-01-12 00:44:57 +0000 | [diff] [blame] | 2433 | |
| 2434 | case ImplicitConversionSequence::AmbiguousConversion: |
John McCall | 120d63c | 2010-08-24 20:38:10 +0000 | [diff] [blame] | 2435 | ICS.DiagnoseAmbiguousConversion(*this, From->getExprLoc(), |
John McCall | 1d31833 | 2010-01-12 00:44:57 +0000 | [diff] [blame] | 2436 | PDiag(diag::err_typecheck_ambiguous_condition) |
| 2437 | << From->getSourceRange()); |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2438 | return ExprError(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2439 | |
Douglas Gregor | 94b1dd2 | 2008-10-24 04:54:22 +0000 | [diff] [blame] | 2440 | case ImplicitConversionSequence::EllipsisConversion: |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 2441 | llvm_unreachable("Cannot perform an ellipsis conversion"); |
Douglas Gregor | 94b1dd2 | 2008-10-24 04:54:22 +0000 | [diff] [blame] | 2442 | |
| 2443 | case ImplicitConversionSequence::BadConversion: |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2444 | return ExprError(); |
Douglas Gregor | 94b1dd2 | 2008-10-24 04:54:22 +0000 | [diff] [blame] | 2445 | } |
| 2446 | |
| 2447 | // Everything went well. |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2448 | return Owned(From); |
Douglas Gregor | 94b1dd2 | 2008-10-24 04:54:22 +0000 | [diff] [blame] | 2449 | } |
| 2450 | |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 2451 | /// PerformImplicitConversion - Perform an implicit conversion of the |
Douglas Gregor | 94b1dd2 | 2008-10-24 04:54:22 +0000 | [diff] [blame] | 2452 | /// expression From to the type ToType by following the standard |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2453 | /// conversion sequence SCS. Returns the converted |
Douglas Gregor | 45920e8 | 2008-12-19 17:40:08 +0000 | [diff] [blame] | 2454 | /// expression. Flavor is the context in which we're performing this |
| 2455 | /// conversion, for use in error messages. |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2456 | ExprResult |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 2457 | Sema::PerformImplicitConversion(Expr *From, QualType ToType, |
Douglas Gregor | 45920e8 | 2008-12-19 17:40:08 +0000 | [diff] [blame] | 2458 | const StandardConversionSequence& SCS, |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2459 | AssignmentAction Action, |
| 2460 | CheckedConversionKind CCK) { |
| 2461 | bool CStyle = (CCK == CCK_CStyleCast || CCK == CCK_FunctionalCast); |
| 2462 | |
Mike Stump | 390b4cc | 2009-05-16 07:39:55 +0000 | [diff] [blame] | 2463 | // Overall FIXME: we are recomputing too many types here and doing far too |
| 2464 | // much extra work. What this means is that we need to keep track of more |
| 2465 | // information that is computed when we try the implicit conversion initially, |
| 2466 | // so that we don't need to recompute anything here. |
Douglas Gregor | 94b1dd2 | 2008-10-24 04:54:22 +0000 | [diff] [blame] | 2467 | QualType FromType = From->getType(); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2468 | |
Douglas Gregor | 225c41e | 2008-11-03 19:09:14 +0000 | [diff] [blame] | 2469 | if (SCS.CopyConstructor) { |
Anders Carlsson | 7c3e8a1 | 2009-05-19 04:45:15 +0000 | [diff] [blame] | 2470 | // FIXME: When can ToType be a reference type? |
| 2471 | assert(!ToType->isReferenceType()); |
Fariborz Jahanian | b3c4774 | 2009-09-25 18:59:21 +0000 | [diff] [blame] | 2472 | if (SCS.Second == ICK_Derived_To_Base) { |
Benjamin Kramer | 4e28d9e | 2012-08-23 22:51:59 +0000 | [diff] [blame] | 2473 | SmallVector<Expr*, 8> ConstructorArgs; |
Fariborz Jahanian | b3c4774 | 2009-09-25 18:59:21 +0000 | [diff] [blame] | 2474 | if (CompleteConstructorCall(cast<CXXConstructorDecl>(SCS.CopyConstructor), |
Benjamin Kramer | 5354e77 | 2012-08-23 23:38:35 +0000 | [diff] [blame] | 2475 | From, /*FIXME:ConstructLoc*/SourceLocation(), |
Fariborz Jahanian | b3c4774 | 2009-09-25 18:59:21 +0000 | [diff] [blame] | 2476 | ConstructorArgs)) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2477 | return ExprError(); |
| 2478 | return BuildCXXConstructExpr(/*FIXME:ConstructLoc*/SourceLocation(), |
| 2479 | ToType, SCS.CopyConstructor, |
Benjamin Kramer | 3fe198b | 2012-08-23 21:35:17 +0000 | [diff] [blame] | 2480 | ConstructorArgs, |
Abramo Bagnara | 7cc58b4 | 2011-10-05 07:56:41 +0000 | [diff] [blame] | 2481 | /*HadMultipleCandidates*/ false, |
Richard Smith | c83c230 | 2012-12-19 01:39:02 +0000 | [diff] [blame] | 2482 | /*ListInit*/ false, /*ZeroInit*/ false, |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2483 | CXXConstructExpr::CK_Complete, |
| 2484 | SourceRange()); |
Fariborz Jahanian | b3c4774 | 2009-09-25 18:59:21 +0000 | [diff] [blame] | 2485 | } |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2486 | return BuildCXXConstructExpr(/*FIXME:ConstructLoc*/SourceLocation(), |
| 2487 | ToType, SCS.CopyConstructor, |
Benjamin Kramer | 5354e77 | 2012-08-23 23:38:35 +0000 | [diff] [blame] | 2488 | From, /*HadMultipleCandidates*/ false, |
Richard Smith | c83c230 | 2012-12-19 01:39:02 +0000 | [diff] [blame] | 2489 | /*ListInit*/ false, /*ZeroInit*/ false, |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2490 | CXXConstructExpr::CK_Complete, |
| 2491 | SourceRange()); |
Douglas Gregor | 225c41e | 2008-11-03 19:09:14 +0000 | [diff] [blame] | 2492 | } |
| 2493 | |
Douglas Gregor | ad4e02f | 2010-04-29 18:24:40 +0000 | [diff] [blame] | 2494 | // Resolve overloaded function references. |
| 2495 | if (Context.hasSameType(FromType, Context.OverloadTy)) { |
| 2496 | DeclAccessPair Found; |
| 2497 | FunctionDecl *Fn = ResolveAddressOfOverloadedFunction(From, ToType, |
| 2498 | true, Found); |
| 2499 | if (!Fn) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2500 | return ExprError(); |
Douglas Gregor | ad4e02f | 2010-04-29 18:24:40 +0000 | [diff] [blame] | 2501 | |
Daniel Dunbar | 96a0014 | 2012-03-09 18:35:03 +0000 | [diff] [blame] | 2502 | if (DiagnoseUseOfDecl(Fn, From->getLocStart())) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2503 | return ExprError(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2504 | |
Douglas Gregor | ad4e02f | 2010-04-29 18:24:40 +0000 | [diff] [blame] | 2505 | From = FixOverloadedFunctionReference(From, Found, Fn); |
| 2506 | FromType = From->getType(); |
| 2507 | } |
| 2508 | |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 2509 | // Perform the first implicit conversion. |
Douglas Gregor | 94b1dd2 | 2008-10-24 04:54:22 +0000 | [diff] [blame] | 2510 | switch (SCS.First) { |
| 2511 | case ICK_Identity: |
Douglas Gregor | 94b1dd2 | 2008-10-24 04:54:22 +0000 | [diff] [blame] | 2512 | // Nothing to do. |
| 2513 | break; |
| 2514 | |
Eli Friedman | d814eaf | 2012-01-24 22:51:26 +0000 | [diff] [blame] | 2515 | case ICK_Lvalue_To_Rvalue: { |
John McCall | 3c3b7f9 | 2011-10-25 17:37:35 +0000 | [diff] [blame] | 2516 | assert(From->getObjectKind() != OK_ObjCProperty); |
John McCall | f6a1648 | 2010-12-04 03:47:34 +0000 | [diff] [blame] | 2517 | FromType = FromType.getUnqualifiedType(); |
Eli Friedman | d814eaf | 2012-01-24 22:51:26 +0000 | [diff] [blame] | 2518 | ExprResult FromRes = DefaultLvalueConversion(From); |
| 2519 | assert(!FromRes.isInvalid() && "Can't perform deduced conversion?!"); |
| 2520 | From = FromRes.take(); |
John McCall | f6a1648 | 2010-12-04 03:47:34 +0000 | [diff] [blame] | 2521 | break; |
Eli Friedman | d814eaf | 2012-01-24 22:51:26 +0000 | [diff] [blame] | 2522 | } |
John McCall | f6a1648 | 2010-12-04 03:47:34 +0000 | [diff] [blame] | 2523 | |
Douglas Gregor | 94b1dd2 | 2008-10-24 04:54:22 +0000 | [diff] [blame] | 2524 | case ICK_Array_To_Pointer: |
Douglas Gregor | 48f3bb9 | 2009-02-18 21:56:37 +0000 | [diff] [blame] | 2525 | FromType = Context.getArrayDecayedType(FromType); |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 2526 | From = ImpCastExprToType(From, FromType, CK_ArrayToPointerDecay, |
| 2527 | VK_RValue, /*BasePath=*/0, CCK).take(); |
Douglas Gregor | 48f3bb9 | 2009-02-18 21:56:37 +0000 | [diff] [blame] | 2528 | break; |
| 2529 | |
| 2530 | case ICK_Function_To_Pointer: |
Douglas Gregor | 94b1dd2 | 2008-10-24 04:54:22 +0000 | [diff] [blame] | 2531 | FromType = Context.getPointerType(FromType); |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 2532 | From = ImpCastExprToType(From, FromType, CK_FunctionToPointerDecay, |
| 2533 | VK_RValue, /*BasePath=*/0, CCK).take(); |
Douglas Gregor | 94b1dd2 | 2008-10-24 04:54:22 +0000 | [diff] [blame] | 2534 | break; |
| 2535 | |
| 2536 | default: |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 2537 | llvm_unreachable("Improper first standard conversion"); |
Douglas Gregor | 94b1dd2 | 2008-10-24 04:54:22 +0000 | [diff] [blame] | 2538 | } |
| 2539 | |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 2540 | // Perform the second implicit conversion |
Douglas Gregor | 94b1dd2 | 2008-10-24 04:54:22 +0000 | [diff] [blame] | 2541 | switch (SCS.Second) { |
| 2542 | case ICK_Identity: |
Sebastian Redl | 2c7588f | 2009-10-10 12:04:10 +0000 | [diff] [blame] | 2543 | // If both sides are functions (or pointers/references to them), there could |
| 2544 | // be incompatible exception declarations. |
| 2545 | if (CheckExceptionSpecCompatibility(From, ToType)) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2546 | return ExprError(); |
Sebastian Redl | 2c7588f | 2009-10-10 12:04:10 +0000 | [diff] [blame] | 2547 | // Nothing else to do. |
Douglas Gregor | 94b1dd2 | 2008-10-24 04:54:22 +0000 | [diff] [blame] | 2548 | break; |
| 2549 | |
Douglas Gregor | 43c79c2 | 2009-12-09 00:47:37 +0000 | [diff] [blame] | 2550 | case ICK_NoReturn_Adjustment: |
| 2551 | // If both sides are functions (or pointers/references to them), there could |
| 2552 | // be incompatible exception declarations. |
| 2553 | if (CheckExceptionSpecCompatibility(From, ToType)) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2554 | return ExprError(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2555 | |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 2556 | From = ImpCastExprToType(From, ToType, CK_NoOp, |
| 2557 | VK_RValue, /*BasePath=*/0, CCK).take(); |
Douglas Gregor | 43c79c2 | 2009-12-09 00:47:37 +0000 | [diff] [blame] | 2558 | break; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2559 | |
Douglas Gregor | 94b1dd2 | 2008-10-24 04:54:22 +0000 | [diff] [blame] | 2560 | case ICK_Integral_Promotion: |
Douglas Gregor | 94b1dd2 | 2008-10-24 04:54:22 +0000 | [diff] [blame] | 2561 | case ICK_Integral_Conversion: |
Richard Smith | e7ff919 | 2012-09-13 21:18:54 +0000 | [diff] [blame] | 2562 | if (ToType->isBooleanType()) { |
| 2563 | assert(FromType->castAs<EnumType>()->getDecl()->isFixed() && |
| 2564 | SCS.Second == ICK_Integral_Promotion && |
| 2565 | "only enums with fixed underlying type can promote to bool"); |
| 2566 | From = ImpCastExprToType(From, ToType, CK_IntegralToBoolean, |
| 2567 | VK_RValue, /*BasePath=*/0, CCK).take(); |
| 2568 | } else { |
| 2569 | From = ImpCastExprToType(From, ToType, CK_IntegralCast, |
| 2570 | VK_RValue, /*BasePath=*/0, CCK).take(); |
| 2571 | } |
Eli Friedman | 73c39ab | 2009-10-20 08:27:19 +0000 | [diff] [blame] | 2572 | break; |
| 2573 | |
| 2574 | case ICK_Floating_Promotion: |
Douglas Gregor | 94b1dd2 | 2008-10-24 04:54:22 +0000 | [diff] [blame] | 2575 | case ICK_Floating_Conversion: |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 2576 | From = ImpCastExprToType(From, ToType, CK_FloatingCast, |
| 2577 | VK_RValue, /*BasePath=*/0, CCK).take(); |
Eli Friedman | 73c39ab | 2009-10-20 08:27:19 +0000 | [diff] [blame] | 2578 | break; |
| 2579 | |
| 2580 | case ICK_Complex_Promotion: |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 2581 | case ICK_Complex_Conversion: { |
| 2582 | QualType FromEl = From->getType()->getAs<ComplexType>()->getElementType(); |
| 2583 | QualType ToEl = ToType->getAs<ComplexType>()->getElementType(); |
| 2584 | CastKind CK; |
| 2585 | if (FromEl->isRealFloatingType()) { |
| 2586 | if (ToEl->isRealFloatingType()) |
| 2587 | CK = CK_FloatingComplexCast; |
| 2588 | else |
| 2589 | CK = CK_FloatingComplexToIntegralComplex; |
| 2590 | } else if (ToEl->isRealFloatingType()) { |
| 2591 | CK = CK_IntegralComplexToFloatingComplex; |
| 2592 | } else { |
| 2593 | CK = CK_IntegralComplexCast; |
| 2594 | } |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 2595 | From = ImpCastExprToType(From, ToType, CK, |
| 2596 | VK_RValue, /*BasePath=*/0, CCK).take(); |
Eli Friedman | 73c39ab | 2009-10-20 08:27:19 +0000 | [diff] [blame] | 2597 | break; |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 2598 | } |
Eli Friedman | 73c39ab | 2009-10-20 08:27:19 +0000 | [diff] [blame] | 2599 | |
Douglas Gregor | 94b1dd2 | 2008-10-24 04:54:22 +0000 | [diff] [blame] | 2600 | case ICK_Floating_Integral: |
Douglas Gregor | 0c293ea | 2010-06-22 23:07:26 +0000 | [diff] [blame] | 2601 | if (ToType->isRealFloatingType()) |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 2602 | From = ImpCastExprToType(From, ToType, CK_IntegralToFloating, |
| 2603 | VK_RValue, /*BasePath=*/0, CCK).take(); |
Eli Friedman | 73c39ab | 2009-10-20 08:27:19 +0000 | [diff] [blame] | 2604 | else |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 2605 | From = ImpCastExprToType(From, ToType, CK_FloatingToIntegral, |
| 2606 | VK_RValue, /*BasePath=*/0, CCK).take(); |
Eli Friedman | 73c39ab | 2009-10-20 08:27:19 +0000 | [diff] [blame] | 2607 | break; |
| 2608 | |
Douglas Gregor | f9201e0 | 2009-02-11 23:02:49 +0000 | [diff] [blame] | 2609 | case ICK_Compatible_Conversion: |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 2610 | From = ImpCastExprToType(From, ToType, CK_NoOp, |
| 2611 | VK_RValue, /*BasePath=*/0, CCK).take(); |
Douglas Gregor | 94b1dd2 | 2008-10-24 04:54:22 +0000 | [diff] [blame] | 2612 | break; |
| 2613 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2614 | case ICK_Writeback_Conversion: |
Anders Carlsson | 61faec1 | 2009-09-12 04:46:44 +0000 | [diff] [blame] | 2615 | case ICK_Pointer_Conversion: { |
Douglas Gregor | a3998bd | 2010-12-02 21:47:04 +0000 | [diff] [blame] | 2616 | if (SCS.IncompatibleObjC && Action != AA_Casting) { |
Douglas Gregor | 45920e8 | 2008-12-19 17:40:08 +0000 | [diff] [blame] | 2617 | // Diagnose incompatible Objective-C conversions |
Douglas Gregor | 8cf0d22 | 2011-06-11 04:42:12 +0000 | [diff] [blame] | 2618 | if (Action == AA_Initializing || Action == AA_Assigning) |
Daniel Dunbar | 96a0014 | 2012-03-09 18:35:03 +0000 | [diff] [blame] | 2619 | Diag(From->getLocStart(), |
Fariborz Jahanian | 84950c7 | 2011-03-21 19:08:42 +0000 | [diff] [blame] | 2620 | diag::ext_typecheck_convert_incompatible_pointer) |
| 2621 | << ToType << From->getType() << Action |
Anna Zaks | 6722155 | 2011-07-28 19:51:27 +0000 | [diff] [blame] | 2622 | << From->getSourceRange() << 0; |
Fariborz Jahanian | 84950c7 | 2011-03-21 19:08:42 +0000 | [diff] [blame] | 2623 | else |
Daniel Dunbar | 96a0014 | 2012-03-09 18:35:03 +0000 | [diff] [blame] | 2624 | Diag(From->getLocStart(), |
Fariborz Jahanian | 84950c7 | 2011-03-21 19:08:42 +0000 | [diff] [blame] | 2625 | diag::ext_typecheck_convert_incompatible_pointer) |
| 2626 | << From->getType() << ToType << Action |
Anna Zaks | 6722155 | 2011-07-28 19:51:27 +0000 | [diff] [blame] | 2627 | << From->getSourceRange() << 0; |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2628 | |
Douglas Gregor | 926df6c | 2011-06-11 01:09:30 +0000 | [diff] [blame] | 2629 | if (From->getType()->isObjCObjectPointerType() && |
| 2630 | ToType->isObjCObjectPointerType()) |
| 2631 | EmitRelatedResultTypeNote(From); |
Fariborz Jahanian | 82007c3 | 2011-07-08 17:41:42 +0000 | [diff] [blame] | 2632 | } |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 2633 | else if (getLangOpts().ObjCAutoRefCount && |
Fariborz Jahanian | 82007c3 | 2011-07-08 17:41:42 +0000 | [diff] [blame] | 2634 | !CheckObjCARCUnavailableWeakConversion(ToType, |
| 2635 | From->getType())) { |
John McCall | 7f3a6d3 | 2011-09-09 06:12:06 +0000 | [diff] [blame] | 2636 | if (Action == AA_Initializing) |
Daniel Dunbar | 96a0014 | 2012-03-09 18:35:03 +0000 | [diff] [blame] | 2637 | Diag(From->getLocStart(), |
John McCall | 7f3a6d3 | 2011-09-09 06:12:06 +0000 | [diff] [blame] | 2638 | diag::err_arc_weak_unavailable_assign); |
| 2639 | else |
Daniel Dunbar | 96a0014 | 2012-03-09 18:35:03 +0000 | [diff] [blame] | 2640 | Diag(From->getLocStart(), |
John McCall | 7f3a6d3 | 2011-09-09 06:12:06 +0000 | [diff] [blame] | 2641 | diag::err_arc_convesion_of_weak_unavailable) |
| 2642 | << (Action == AA_Casting) << From->getType() << ToType |
| 2643 | << From->getSourceRange(); |
| 2644 | } |
Fariborz Jahanian | 82007c3 | 2011-07-08 17:41:42 +0000 | [diff] [blame] | 2645 | |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 2646 | CastKind Kind = CK_Invalid; |
John McCall | f871d0c | 2010-08-07 06:22:56 +0000 | [diff] [blame] | 2647 | CXXCastPath BasePath; |
Douglas Gregor | 14d0aee | 2011-01-27 00:58:17 +0000 | [diff] [blame] | 2648 | if (CheckPointerConversion(From, ToType, Kind, BasePath, CStyle)) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2649 | return ExprError(); |
John McCall | dc05b11 | 2011-09-10 01:16:55 +0000 | [diff] [blame] | 2650 | |
| 2651 | // Make sure we extend blocks if necessary. |
| 2652 | // FIXME: doing this here is really ugly. |
| 2653 | if (Kind == CK_BlockPointerToObjCPointerCast) { |
| 2654 | ExprResult E = From; |
| 2655 | (void) PrepareCastToObjCObjectPointer(E); |
| 2656 | From = E.take(); |
| 2657 | } |
| 2658 | |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 2659 | From = ImpCastExprToType(From, ToType, Kind, VK_RValue, &BasePath, CCK) |
| 2660 | .take(); |
Douglas Gregor | 94b1dd2 | 2008-10-24 04:54:22 +0000 | [diff] [blame] | 2661 | break; |
Anders Carlsson | 61faec1 | 2009-09-12 04:46:44 +0000 | [diff] [blame] | 2662 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2663 | |
Anders Carlsson | 61faec1 | 2009-09-12 04:46:44 +0000 | [diff] [blame] | 2664 | case ICK_Pointer_Member: { |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 2665 | CastKind Kind = CK_Invalid; |
John McCall | f871d0c | 2010-08-07 06:22:56 +0000 | [diff] [blame] | 2666 | CXXCastPath BasePath; |
Douglas Gregor | 14d0aee | 2011-01-27 00:58:17 +0000 | [diff] [blame] | 2667 | if (CheckMemberPointerConversion(From, ToType, Kind, BasePath, CStyle)) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2668 | return ExprError(); |
Sebastian Redl | 2c7588f | 2009-10-10 12:04:10 +0000 | [diff] [blame] | 2669 | if (CheckExceptionSpecCompatibility(From, ToType)) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2670 | return ExprError(); |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 2671 | From = ImpCastExprToType(From, ToType, Kind, VK_RValue, &BasePath, CCK) |
| 2672 | .take(); |
Anders Carlsson | 61faec1 | 2009-09-12 04:46:44 +0000 | [diff] [blame] | 2673 | break; |
| 2674 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2675 | |
Abramo Bagnara | 737d544 | 2011-04-07 09:26:19 +0000 | [diff] [blame] | 2676 | case ICK_Boolean_Conversion: |
Anton Korobeynikov | aa4a99b | 2011-10-14 23:23:15 +0000 | [diff] [blame] | 2677 | // Perform half-to-boolean conversion via float. |
| 2678 | if (From->getType()->isHalfType()) { |
| 2679 | From = ImpCastExprToType(From, Context.FloatTy, CK_FloatingCast).take(); |
| 2680 | FromType = Context.FloatTy; |
| 2681 | } |
| 2682 | |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 2683 | From = ImpCastExprToType(From, Context.BoolTy, |
| 2684 | ScalarTypeToBooleanCastKind(FromType), |
| 2685 | VK_RValue, /*BasePath=*/0, CCK).take(); |
Douglas Gregor | 94b1dd2 | 2008-10-24 04:54:22 +0000 | [diff] [blame] | 2686 | break; |
| 2687 | |
Douglas Gregor | 6fb745b | 2010-05-13 16:44:06 +0000 | [diff] [blame] | 2688 | case ICK_Derived_To_Base: { |
John McCall | f871d0c | 2010-08-07 06:22:56 +0000 | [diff] [blame] | 2689 | CXXCastPath BasePath; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2690 | if (CheckDerivedToBaseConversion(From->getType(), |
Douglas Gregor | b7a86f5 | 2009-11-06 01:02:41 +0000 | [diff] [blame] | 2691 | ToType.getNonReferenceType(), |
| 2692 | From->getLocStart(), |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2693 | From->getSourceRange(), |
Douglas Gregor | 6fb745b | 2010-05-13 16:44:06 +0000 | [diff] [blame] | 2694 | &BasePath, |
Douglas Gregor | 14d0aee | 2011-01-27 00:58:17 +0000 | [diff] [blame] | 2695 | CStyle)) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2696 | return ExprError(); |
Douglas Gregor | 6fb745b | 2010-05-13 16:44:06 +0000 | [diff] [blame] | 2697 | |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 2698 | From = ImpCastExprToType(From, ToType.getNonReferenceType(), |
| 2699 | CK_DerivedToBase, From->getValueKind(), |
| 2700 | &BasePath, CCK).take(); |
Douglas Gregor | b7a86f5 | 2009-11-06 01:02:41 +0000 | [diff] [blame] | 2701 | break; |
Douglas Gregor | 6fb745b | 2010-05-13 16:44:06 +0000 | [diff] [blame] | 2702 | } |
| 2703 | |
Douglas Gregor | fb4a543 | 2010-05-18 22:42:18 +0000 | [diff] [blame] | 2704 | case ICK_Vector_Conversion: |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 2705 | From = ImpCastExprToType(From, ToType, CK_BitCast, |
| 2706 | VK_RValue, /*BasePath=*/0, CCK).take(); |
Douglas Gregor | fb4a543 | 2010-05-18 22:42:18 +0000 | [diff] [blame] | 2707 | break; |
| 2708 | |
| 2709 | case ICK_Vector_Splat: |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 2710 | From = ImpCastExprToType(From, ToType, CK_VectorSplat, |
| 2711 | VK_RValue, /*BasePath=*/0, CCK).take(); |
Douglas Gregor | fb4a543 | 2010-05-18 22:42:18 +0000 | [diff] [blame] | 2712 | break; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 2713 | |
Douglas Gregor | fb4a543 | 2010-05-18 22:42:18 +0000 | [diff] [blame] | 2714 | case ICK_Complex_Real: |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 2715 | // Case 1. x -> _Complex y |
| 2716 | if (const ComplexType *ToComplex = ToType->getAs<ComplexType>()) { |
| 2717 | QualType ElType = ToComplex->getElementType(); |
| 2718 | bool isFloatingComplex = ElType->isRealFloatingType(); |
| 2719 | |
| 2720 | // x -> y |
| 2721 | if (Context.hasSameUnqualifiedType(ElType, From->getType())) { |
| 2722 | // do nothing |
| 2723 | } else if (From->getType()->isRealFloatingType()) { |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 2724 | From = ImpCastExprToType(From, ElType, |
| 2725 | isFloatingComplex ? CK_FloatingCast : CK_FloatingToIntegral).take(); |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 2726 | } else { |
| 2727 | assert(From->getType()->isIntegerType()); |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 2728 | From = ImpCastExprToType(From, ElType, |
| 2729 | isFloatingComplex ? CK_IntegralToFloating : CK_IntegralCast).take(); |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 2730 | } |
| 2731 | // y -> _Complex y |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 2732 | From = ImpCastExprToType(From, ToType, |
| 2733 | isFloatingComplex ? CK_FloatingRealToComplex |
| 2734 | : CK_IntegralRealToComplex).take(); |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 2735 | |
| 2736 | // Case 2. _Complex x -> y |
| 2737 | } else { |
| 2738 | const ComplexType *FromComplex = From->getType()->getAs<ComplexType>(); |
| 2739 | assert(FromComplex); |
| 2740 | |
| 2741 | QualType ElType = FromComplex->getElementType(); |
| 2742 | bool isFloatingComplex = ElType->isRealFloatingType(); |
| 2743 | |
| 2744 | // _Complex x -> x |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 2745 | From = ImpCastExprToType(From, ElType, |
| 2746 | isFloatingComplex ? CK_FloatingComplexToReal |
| 2747 | : CK_IntegralComplexToReal, |
| 2748 | VK_RValue, /*BasePath=*/0, CCK).take(); |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 2749 | |
| 2750 | // x -> y |
| 2751 | if (Context.hasSameUnqualifiedType(ElType, ToType)) { |
| 2752 | // do nothing |
| 2753 | } else if (ToType->isRealFloatingType()) { |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 2754 | From = ImpCastExprToType(From, ToType, |
| 2755 | isFloatingComplex ? CK_FloatingCast : CK_IntegralToFloating, |
| 2756 | VK_RValue, /*BasePath=*/0, CCK).take(); |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 2757 | } else { |
| 2758 | assert(ToType->isIntegerType()); |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 2759 | From = ImpCastExprToType(From, ToType, |
| 2760 | isFloatingComplex ? CK_FloatingToIntegral : CK_IntegralCast, |
| 2761 | VK_RValue, /*BasePath=*/0, CCK).take(); |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 2762 | } |
| 2763 | } |
Douglas Gregor | fb4a543 | 2010-05-18 22:42:18 +0000 | [diff] [blame] | 2764 | break; |
Fariborz Jahanian | e3c8c64 | 2011-02-12 19:07:46 +0000 | [diff] [blame] | 2765 | |
| 2766 | case ICK_Block_Pointer_Conversion: { |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 2767 | From = ImpCastExprToType(From, ToType.getUnqualifiedType(), CK_BitCast, |
| 2768 | VK_RValue, /*BasePath=*/0, CCK).take(); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2769 | break; |
| 2770 | } |
Fariborz Jahanian | e3c8c64 | 2011-02-12 19:07:46 +0000 | [diff] [blame] | 2771 | |
Fariborz Jahanian | d97f558 | 2011-03-23 19:50:54 +0000 | [diff] [blame] | 2772 | case ICK_TransparentUnionConversion: { |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2773 | ExprResult FromRes = Owned(From); |
Fariborz Jahanian | d97f558 | 2011-03-23 19:50:54 +0000 | [diff] [blame] | 2774 | Sema::AssignConvertType ConvTy = |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2775 | CheckTransparentUnionArgumentConstraints(ToType, FromRes); |
| 2776 | if (FromRes.isInvalid()) |
| 2777 | return ExprError(); |
| 2778 | From = FromRes.take(); |
Fariborz Jahanian | d97f558 | 2011-03-23 19:50:54 +0000 | [diff] [blame] | 2779 | assert ((ConvTy == Sema::Compatible) && |
| 2780 | "Improper transparent union conversion"); |
| 2781 | (void)ConvTy; |
| 2782 | break; |
| 2783 | } |
| 2784 | |
Douglas Gregor | fb4a543 | 2010-05-18 22:42:18 +0000 | [diff] [blame] | 2785 | case ICK_Lvalue_To_Rvalue: |
| 2786 | case ICK_Array_To_Pointer: |
| 2787 | case ICK_Function_To_Pointer: |
| 2788 | case ICK_Qualification: |
| 2789 | case ICK_Num_Conversion_Kinds: |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 2790 | llvm_unreachable("Improper second standard conversion"); |
Douglas Gregor | 94b1dd2 | 2008-10-24 04:54:22 +0000 | [diff] [blame] | 2791 | } |
| 2792 | |
| 2793 | switch (SCS.Third) { |
| 2794 | case ICK_Identity: |
| 2795 | // Nothing to do. |
| 2796 | break; |
| 2797 | |
Sebastian Redl | 906082e | 2010-07-20 04:20:21 +0000 | [diff] [blame] | 2798 | case ICK_Qualification: { |
| 2799 | // The qualification keeps the category of the inner expression, unless the |
| 2800 | // target type isn't a reference. |
John McCall | 5baba9d | 2010-08-25 10:28:54 +0000 | [diff] [blame] | 2801 | ExprValueKind VK = ToType->isReferenceType() ? |
Eli Friedman | c1c0dfb | 2011-09-27 21:58:52 +0000 | [diff] [blame] | 2802 | From->getValueKind() : VK_RValue; |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 2803 | From = ImpCastExprToType(From, ToType.getNonLValueExprType(Context), |
| 2804 | CK_NoOp, VK, /*BasePath=*/0, CCK).take(); |
Douglas Gregor | a9bff30 | 2010-02-28 18:30:25 +0000 | [diff] [blame] | 2805 | |
Douglas Gregor | 069a6da | 2011-03-14 16:13:32 +0000 | [diff] [blame] | 2806 | if (SCS.DeprecatedStringLiteralToCharPtr && |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 2807 | !getLangOpts().WritableStrings) |
Douglas Gregor | a9bff30 | 2010-02-28 18:30:25 +0000 | [diff] [blame] | 2808 | Diag(From->getLocStart(), diag::warn_deprecated_string_literal_conversion) |
| 2809 | << ToType.getNonReferenceType(); |
| 2810 | |
Douglas Gregor | 94b1dd2 | 2008-10-24 04:54:22 +0000 | [diff] [blame] | 2811 | break; |
Sebastian Redl | 906082e | 2010-07-20 04:20:21 +0000 | [diff] [blame] | 2812 | } |
| 2813 | |
Douglas Gregor | 94b1dd2 | 2008-10-24 04:54:22 +0000 | [diff] [blame] | 2814 | default: |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 2815 | llvm_unreachable("Improper third standard conversion"); |
Douglas Gregor | 94b1dd2 | 2008-10-24 04:54:22 +0000 | [diff] [blame] | 2816 | } |
| 2817 | |
Douglas Gregor | 47bfcca | 2012-04-12 20:42:30 +0000 | [diff] [blame] | 2818 | // If this conversion sequence involved a scalar -> atomic conversion, perform |
| 2819 | // that conversion now. |
| 2820 | if (const AtomicType *ToAtomic = ToType->getAs<AtomicType>()) |
| 2821 | if (Context.hasSameType(ToAtomic->getValueType(), From->getType())) |
| 2822 | From = ImpCastExprToType(From, ToType, CK_NonAtomicToAtomic, VK_RValue, 0, |
| 2823 | CCK).take(); |
| 2824 | |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 2825 | return Owned(From); |
Douglas Gregor | 94b1dd2 | 2008-10-24 04:54:22 +0000 | [diff] [blame] | 2826 | } |
| 2827 | |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 2828 | ExprResult Sema::ActOnUnaryTypeTrait(UnaryTypeTrait UTT, |
Douglas Gregor | 3d37c0a | 2010-09-09 16:14:44 +0000 | [diff] [blame] | 2829 | SourceLocation KWLoc, |
| 2830 | ParsedType Ty, |
| 2831 | SourceLocation RParen) { |
| 2832 | TypeSourceInfo *TSInfo; |
| 2833 | QualType T = GetTypeFromParser(Ty, &TSInfo); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2834 | |
Douglas Gregor | 3d37c0a | 2010-09-09 16:14:44 +0000 | [diff] [blame] | 2835 | if (!TSInfo) |
| 2836 | TSInfo = Context.getTrivialTypeSourceInfo(T); |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 2837 | return BuildUnaryTypeTrait(UTT, KWLoc, TSInfo, RParen); |
Douglas Gregor | 3d37c0a | 2010-09-09 16:14:44 +0000 | [diff] [blame] | 2838 | } |
| 2839 | |
Chandler Carruth | ccb4ecf | 2011-05-01 06:51:22 +0000 | [diff] [blame] | 2840 | /// \brief Check the completeness of a type in a unary type trait. |
| 2841 | /// |
| 2842 | /// If the particular type trait requires a complete type, tries to complete |
| 2843 | /// it. If completing the type fails, a diagnostic is emitted and false |
| 2844 | /// returned. If completing the type succeeds or no completion was required, |
| 2845 | /// returns true. |
| 2846 | static bool CheckUnaryTypeTraitTypeCompleteness(Sema &S, |
| 2847 | UnaryTypeTrait UTT, |
| 2848 | SourceLocation Loc, |
| 2849 | QualType ArgTy) { |
| 2850 | // C++0x [meta.unary.prop]p3: |
| 2851 | // For all of the class templates X declared in this Clause, instantiating |
| 2852 | // that template with a template argument that is a class template |
| 2853 | // specialization may result in the implicit instantiation of the template |
| 2854 | // argument if and only if the semantics of X require that the argument |
| 2855 | // must be a complete type. |
| 2856 | // We apply this rule to all the type trait expressions used to implement |
| 2857 | // these class templates. We also try to follow any GCC documented behavior |
| 2858 | // in these expressions to ensure portability of standard libraries. |
| 2859 | switch (UTT) { |
Chandler Carruth | ccb4ecf | 2011-05-01 06:51:22 +0000 | [diff] [blame] | 2860 | // is_complete_type somewhat obviously cannot require a complete type. |
| 2861 | case UTT_IsCompleteType: |
Chandler Carruth | d6efe9b | 2011-05-01 19:18:02 +0000 | [diff] [blame] | 2862 | // Fall-through |
Chandler Carruth | ccb4ecf | 2011-05-01 06:51:22 +0000 | [diff] [blame] | 2863 | |
| 2864 | // These traits are modeled on the type predicates in C++0x |
| 2865 | // [meta.unary.cat] and [meta.unary.comp]. They are not specified as |
| 2866 | // requiring a complete type, as whether or not they return true cannot be |
| 2867 | // impacted by the completeness of the type. |
| 2868 | case UTT_IsVoid: |
| 2869 | case UTT_IsIntegral: |
| 2870 | case UTT_IsFloatingPoint: |
| 2871 | case UTT_IsArray: |
| 2872 | case UTT_IsPointer: |
| 2873 | case UTT_IsLvalueReference: |
| 2874 | case UTT_IsRvalueReference: |
| 2875 | case UTT_IsMemberFunctionPointer: |
| 2876 | case UTT_IsMemberObjectPointer: |
| 2877 | case UTT_IsEnum: |
| 2878 | case UTT_IsUnion: |
| 2879 | case UTT_IsClass: |
| 2880 | case UTT_IsFunction: |
| 2881 | case UTT_IsReference: |
| 2882 | case UTT_IsArithmetic: |
| 2883 | case UTT_IsFundamental: |
| 2884 | case UTT_IsObject: |
| 2885 | case UTT_IsScalar: |
| 2886 | case UTT_IsCompound: |
| 2887 | case UTT_IsMemberPointer: |
Chandler Carruth | d6efe9b | 2011-05-01 19:18:02 +0000 | [diff] [blame] | 2888 | // Fall-through |
Chandler Carruth | ccb4ecf | 2011-05-01 06:51:22 +0000 | [diff] [blame] | 2889 | |
| 2890 | // These traits are modeled on type predicates in C++0x [meta.unary.prop] |
| 2891 | // which requires some of its traits to have the complete type. However, |
| 2892 | // the completeness of the type cannot impact these traits' semantics, and |
| 2893 | // so they don't require it. This matches the comments on these traits in |
| 2894 | // Table 49. |
| 2895 | case UTT_IsConst: |
| 2896 | case UTT_IsVolatile: |
| 2897 | case UTT_IsSigned: |
| 2898 | case UTT_IsUnsigned: |
| 2899 | return true; |
| 2900 | |
| 2901 | // C++0x [meta.unary.prop] Table 49 requires the following traits to be |
Chandler Carruth | d6efe9b | 2011-05-01 19:18:02 +0000 | [diff] [blame] | 2902 | // applied to a complete type. |
Chandler Carruth | ccb4ecf | 2011-05-01 06:51:22 +0000 | [diff] [blame] | 2903 | case UTT_IsTrivial: |
Sean Hunt | feb375d | 2011-05-13 00:31:07 +0000 | [diff] [blame] | 2904 | case UTT_IsTriviallyCopyable: |
Chandler Carruth | ccb4ecf | 2011-05-01 06:51:22 +0000 | [diff] [blame] | 2905 | case UTT_IsStandardLayout: |
| 2906 | case UTT_IsPOD: |
| 2907 | case UTT_IsLiteral: |
| 2908 | case UTT_IsEmpty: |
| 2909 | case UTT_IsPolymorphic: |
| 2910 | case UTT_IsAbstract: |
John McCall | ea30e2f | 2012-09-25 07:32:49 +0000 | [diff] [blame] | 2911 | case UTT_IsInterfaceClass: |
Chandler Carruth | d6efe9b | 2011-05-01 19:18:02 +0000 | [diff] [blame] | 2912 | // Fall-through |
Chandler Carruth | ccb4ecf | 2011-05-01 06:51:22 +0000 | [diff] [blame] | 2913 | |
Douglas Gregor | 5e9392b | 2011-12-03 18:14:24 +0000 | [diff] [blame] | 2914 | // These traits require a complete type. |
| 2915 | case UTT_IsFinal: |
| 2916 | |
Chandler Carruth | d6efe9b | 2011-05-01 19:18:02 +0000 | [diff] [blame] | 2917 | // These trait expressions are designed to help implement predicates in |
Chandler Carruth | ccb4ecf | 2011-05-01 06:51:22 +0000 | [diff] [blame] | 2918 | // [meta.unary.prop] despite not being named the same. They are specified |
| 2919 | // by both GCC and the Embarcadero C++ compiler, and require the complete |
| 2920 | // type due to the overarching C++0x type predicates being implemented |
| 2921 | // requiring the complete type. |
| 2922 | case UTT_HasNothrowAssign: |
| 2923 | case UTT_HasNothrowConstructor: |
| 2924 | case UTT_HasNothrowCopy: |
| 2925 | case UTT_HasTrivialAssign: |
Sean Hunt | 023df37 | 2011-05-09 18:22:59 +0000 | [diff] [blame] | 2926 | case UTT_HasTrivialDefaultConstructor: |
Chandler Carruth | ccb4ecf | 2011-05-01 06:51:22 +0000 | [diff] [blame] | 2927 | case UTT_HasTrivialCopy: |
| 2928 | case UTT_HasTrivialDestructor: |
| 2929 | case UTT_HasVirtualDestructor: |
| 2930 | // Arrays of unknown bound are expressly allowed. |
| 2931 | QualType ElTy = ArgTy; |
| 2932 | if (ArgTy->isIncompleteArrayType()) |
| 2933 | ElTy = S.Context.getAsArrayType(ArgTy)->getElementType(); |
| 2934 | |
| 2935 | // The void type is expressly allowed. |
| 2936 | if (ElTy->isVoidType()) |
| 2937 | return true; |
| 2938 | |
| 2939 | return !S.RequireCompleteType( |
| 2940 | Loc, ElTy, diag::err_incomplete_type_used_in_type_trait_expr); |
John Wiegley | cf56641 | 2011-04-28 02:06:46 +0000 | [diff] [blame] | 2941 | } |
Chandler Carruth | 73e0a91 | 2011-05-01 07:23:17 +0000 | [diff] [blame] | 2942 | llvm_unreachable("Type trait not handled by switch"); |
Chandler Carruth | ccb4ecf | 2011-05-01 06:51:22 +0000 | [diff] [blame] | 2943 | } |
| 2944 | |
| 2945 | static bool EvaluateUnaryTypeTrait(Sema &Self, UnaryTypeTrait UTT, |
| 2946 | SourceLocation KeyLoc, QualType T) { |
Chandler Carruth | d064c70 | 2011-05-01 08:41:10 +0000 | [diff] [blame] | 2947 | assert(!T->isDependentType() && "Cannot evaluate traits of dependent type"); |
John Wiegley | cf56641 | 2011-04-28 02:06:46 +0000 | [diff] [blame] | 2948 | |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 2949 | ASTContext &C = Self.Context; |
| 2950 | switch(UTT) { |
Chandler Carruth | c41d6b5 | 2011-05-01 06:11:07 +0000 | [diff] [blame] | 2951 | // Type trait expressions corresponding to the primary type category |
| 2952 | // predicates in C++0x [meta.unary.cat]. |
| 2953 | case UTT_IsVoid: |
| 2954 | return T->isVoidType(); |
| 2955 | case UTT_IsIntegral: |
| 2956 | return T->isIntegralType(C); |
| 2957 | case UTT_IsFloatingPoint: |
| 2958 | return T->isFloatingType(); |
| 2959 | case UTT_IsArray: |
| 2960 | return T->isArrayType(); |
| 2961 | case UTT_IsPointer: |
| 2962 | return T->isPointerType(); |
| 2963 | case UTT_IsLvalueReference: |
| 2964 | return T->isLValueReferenceType(); |
| 2965 | case UTT_IsRvalueReference: |
| 2966 | return T->isRValueReferenceType(); |
| 2967 | case UTT_IsMemberFunctionPointer: |
| 2968 | return T->isMemberFunctionPointerType(); |
| 2969 | case UTT_IsMemberObjectPointer: |
| 2970 | return T->isMemberDataPointerType(); |
| 2971 | case UTT_IsEnum: |
| 2972 | return T->isEnumeralType(); |
Chandler Carruth | 28eeb38 | 2011-05-01 06:11:03 +0000 | [diff] [blame] | 2973 | case UTT_IsUnion: |
Chandler Carruth | aaf147b | 2011-05-01 09:29:58 +0000 | [diff] [blame] | 2974 | return T->isUnionType(); |
Chandler Carruth | c41d6b5 | 2011-05-01 06:11:07 +0000 | [diff] [blame] | 2975 | case UTT_IsClass: |
Joao Matos | 6666ed4 | 2012-08-31 18:45:21 +0000 | [diff] [blame] | 2976 | return T->isClassType() || T->isStructureType() || T->isInterfaceType(); |
Chandler Carruth | c41d6b5 | 2011-05-01 06:11:07 +0000 | [diff] [blame] | 2977 | case UTT_IsFunction: |
| 2978 | return T->isFunctionType(); |
| 2979 | |
| 2980 | // Type trait expressions which correspond to the convenient composition |
| 2981 | // predicates in C++0x [meta.unary.comp]. |
| 2982 | case UTT_IsReference: |
| 2983 | return T->isReferenceType(); |
| 2984 | case UTT_IsArithmetic: |
Chandler Carruth | aaf147b | 2011-05-01 09:29:58 +0000 | [diff] [blame] | 2985 | return T->isArithmeticType() && !T->isEnumeralType(); |
Chandler Carruth | c41d6b5 | 2011-05-01 06:11:07 +0000 | [diff] [blame] | 2986 | case UTT_IsFundamental: |
Chandler Carruth | aaf147b | 2011-05-01 09:29:58 +0000 | [diff] [blame] | 2987 | return T->isFundamentalType(); |
Chandler Carruth | c41d6b5 | 2011-05-01 06:11:07 +0000 | [diff] [blame] | 2988 | case UTT_IsObject: |
Chandler Carruth | aaf147b | 2011-05-01 09:29:58 +0000 | [diff] [blame] | 2989 | return T->isObjectType(); |
Chandler Carruth | c41d6b5 | 2011-05-01 06:11:07 +0000 | [diff] [blame] | 2990 | case UTT_IsScalar: |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2991 | // Note: semantic analysis depends on Objective-C lifetime types to be |
| 2992 | // considered scalar types. However, such types do not actually behave |
| 2993 | // like scalar types at run time (since they may require retain/release |
| 2994 | // operations), so we report them as non-scalar. |
| 2995 | if (T->isObjCLifetimeType()) { |
| 2996 | switch (T.getObjCLifetime()) { |
| 2997 | case Qualifiers::OCL_None: |
| 2998 | case Qualifiers::OCL_ExplicitNone: |
| 2999 | return true; |
| 3000 | |
| 3001 | case Qualifiers::OCL_Strong: |
| 3002 | case Qualifiers::OCL_Weak: |
| 3003 | case Qualifiers::OCL_Autoreleasing: |
| 3004 | return false; |
| 3005 | } |
| 3006 | } |
| 3007 | |
Chandler Carruth | cec0ced | 2011-05-01 09:29:55 +0000 | [diff] [blame] | 3008 | return T->isScalarType(); |
Chandler Carruth | c41d6b5 | 2011-05-01 06:11:07 +0000 | [diff] [blame] | 3009 | case UTT_IsCompound: |
Chandler Carruth | aaf147b | 2011-05-01 09:29:58 +0000 | [diff] [blame] | 3010 | return T->isCompoundType(); |
Chandler Carruth | c41d6b5 | 2011-05-01 06:11:07 +0000 | [diff] [blame] | 3011 | case UTT_IsMemberPointer: |
| 3012 | return T->isMemberPointerType(); |
| 3013 | |
| 3014 | // Type trait expressions which correspond to the type property predicates |
| 3015 | // in C++0x [meta.unary.prop]. |
| 3016 | case UTT_IsConst: |
| 3017 | return T.isConstQualified(); |
| 3018 | case UTT_IsVolatile: |
| 3019 | return T.isVolatileQualified(); |
| 3020 | case UTT_IsTrivial: |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 3021 | return T.isTrivialType(Self.Context); |
Sean Hunt | feb375d | 2011-05-13 00:31:07 +0000 | [diff] [blame] | 3022 | case UTT_IsTriviallyCopyable: |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 3023 | return T.isTriviallyCopyableType(Self.Context); |
Chandler Carruth | c41d6b5 | 2011-05-01 06:11:07 +0000 | [diff] [blame] | 3024 | case UTT_IsStandardLayout: |
| 3025 | return T->isStandardLayoutType(); |
| 3026 | case UTT_IsPOD: |
Benjamin Kramer | 470360d | 2012-04-28 10:00:33 +0000 | [diff] [blame] | 3027 | return T.isPODType(Self.Context); |
Chandler Carruth | c41d6b5 | 2011-05-01 06:11:07 +0000 | [diff] [blame] | 3028 | case UTT_IsLiteral: |
| 3029 | return T->isLiteralType(); |
| 3030 | case UTT_IsEmpty: |
| 3031 | if (const CXXRecordDecl *RD = T->getAsCXXRecordDecl()) |
| 3032 | return !RD->isUnion() && RD->isEmpty(); |
| 3033 | return false; |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3034 | case UTT_IsPolymorphic: |
Chandler Carruth | 28eeb38 | 2011-05-01 06:11:03 +0000 | [diff] [blame] | 3035 | if (const CXXRecordDecl *RD = T->getAsCXXRecordDecl()) |
| 3036 | return RD->isPolymorphic(); |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3037 | return false; |
| 3038 | case UTT_IsAbstract: |
Chandler Carruth | 28eeb38 | 2011-05-01 06:11:03 +0000 | [diff] [blame] | 3039 | if (const CXXRecordDecl *RD = T->getAsCXXRecordDecl()) |
| 3040 | return RD->isAbstract(); |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3041 | return false; |
John McCall | ea30e2f | 2012-09-25 07:32:49 +0000 | [diff] [blame] | 3042 | case UTT_IsInterfaceClass: |
| 3043 | if (const CXXRecordDecl *RD = T->getAsCXXRecordDecl()) |
| 3044 | return RD->isInterface(); |
| 3045 | return false; |
Douglas Gregor | 5e9392b | 2011-12-03 18:14:24 +0000 | [diff] [blame] | 3046 | case UTT_IsFinal: |
| 3047 | if (const CXXRecordDecl *RD = T->getAsCXXRecordDecl()) |
| 3048 | return RD->hasAttr<FinalAttr>(); |
| 3049 | return false; |
John Wiegley | 20c0da7 | 2011-04-27 23:09:49 +0000 | [diff] [blame] | 3050 | case UTT_IsSigned: |
| 3051 | return T->isSignedIntegerType(); |
John Wiegley | 20c0da7 | 2011-04-27 23:09:49 +0000 | [diff] [blame] | 3052 | case UTT_IsUnsigned: |
| 3053 | return T->isUnsignedIntegerType(); |
Chandler Carruth | c41d6b5 | 2011-05-01 06:11:07 +0000 | [diff] [blame] | 3054 | |
| 3055 | // Type trait expressions which query classes regarding their construction, |
| 3056 | // destruction, and copying. Rather than being based directly on the |
| 3057 | // related type predicates in the standard, they are specified by both |
| 3058 | // GCC[1] and the Embarcadero C++ compiler[2], and Clang implements those |
| 3059 | // specifications. |
| 3060 | // |
| 3061 | // 1: http://gcc.gnu/.org/onlinedocs/gcc/Type-Traits.html |
| 3062 | // 2: http://docwiki.embarcadero.com/RADStudio/XE/en/Type_Trait_Functions_(C%2B%2B0x)_Index |
Richard Smith | ac71351 | 2012-12-08 02:53:02 +0000 | [diff] [blame] | 3063 | // |
| 3064 | // Note that these builtins do not behave as documented in g++: if a class |
| 3065 | // has both a trivial and a non-trivial special member of a particular kind, |
| 3066 | // they return false! For now, we emulate this behavior. |
| 3067 | // FIXME: This appears to be a g++ bug: more complex cases reveal that it |
| 3068 | // does not correctly compute triviality in the presence of multiple special |
| 3069 | // members of the same kind. Revisit this once the g++ bug is fixed. |
Sean Hunt | 023df37 | 2011-05-09 18:22:59 +0000 | [diff] [blame] | 3070 | case UTT_HasTrivialDefaultConstructor: |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3071 | // http://gcc.gnu.org/onlinedocs/gcc/Type-Traits.html: |
| 3072 | // If __is_pod (type) is true then the trait is true, else if type is |
| 3073 | // a cv class or union type (or array thereof) with a trivial default |
| 3074 | // constructor ([class.ctor]) then the trait is true, else it is false. |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 3075 | if (T.isPODType(Self.Context)) |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3076 | return true; |
Richard Smith | ac71351 | 2012-12-08 02:53:02 +0000 | [diff] [blame] | 3077 | if (CXXRecordDecl *RD = C.getBaseElementType(T)->getAsCXXRecordDecl()) |
| 3078 | return RD->hasTrivialDefaultConstructor() && |
| 3079 | !RD->hasNonTrivialDefaultConstructor(); |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3080 | return false; |
| 3081 | case UTT_HasTrivialCopy: |
| 3082 | // http://gcc.gnu.org/onlinedocs/gcc/Type-Traits.html: |
| 3083 | // If __is_pod (type) is true or type is a reference type then |
| 3084 | // the trait is true, else if type is a cv class or union type |
| 3085 | // with a trivial copy constructor ([class.copy]) then the trait |
| 3086 | // is true, else it is false. |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 3087 | if (T.isPODType(Self.Context) || T->isReferenceType()) |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3088 | return true; |
Richard Smith | ac71351 | 2012-12-08 02:53:02 +0000 | [diff] [blame] | 3089 | if (CXXRecordDecl *RD = T->getAsCXXRecordDecl()) |
| 3090 | return RD->hasTrivialCopyConstructor() && |
| 3091 | !RD->hasNonTrivialCopyConstructor(); |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3092 | return false; |
| 3093 | case UTT_HasTrivialAssign: |
| 3094 | // http://gcc.gnu.org/onlinedocs/gcc/Type-Traits.html: |
| 3095 | // If type is const qualified or is a reference type then the |
| 3096 | // trait is false. Otherwise if __is_pod (type) is true then the |
| 3097 | // trait is true, else if type is a cv class or union type with |
| 3098 | // a trivial copy assignment ([class.copy]) then the trait is |
| 3099 | // true, else it is false. |
| 3100 | // Note: the const and reference restrictions are interesting, |
| 3101 | // given that const and reference members don't prevent a class |
| 3102 | // from having a trivial copy assignment operator (but do cause |
| 3103 | // errors if the copy assignment operator is actually used, q.v. |
| 3104 | // [class.copy]p12). |
| 3105 | |
Richard Smith | ac71351 | 2012-12-08 02:53:02 +0000 | [diff] [blame] | 3106 | if (T.isConstQualified()) |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3107 | return false; |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 3108 | if (T.isPODType(Self.Context)) |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3109 | return true; |
Richard Smith | ac71351 | 2012-12-08 02:53:02 +0000 | [diff] [blame] | 3110 | if (CXXRecordDecl *RD = T->getAsCXXRecordDecl()) |
| 3111 | return RD->hasTrivialCopyAssignment() && |
| 3112 | !RD->hasNonTrivialCopyAssignment(); |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3113 | return false; |
| 3114 | case UTT_HasTrivialDestructor: |
| 3115 | // http://gcc.gnu.org/onlinedocs/gcc/Type-Traits.html: |
| 3116 | // If __is_pod (type) is true or type is a reference type |
| 3117 | // then the trait is true, else if type is a cv class or union |
| 3118 | // type (or array thereof) with a trivial destructor |
| 3119 | // ([class.dtor]) then the trait is true, else it is |
| 3120 | // false. |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 3121 | if (T.isPODType(Self.Context) || T->isReferenceType()) |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3122 | return true; |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 3123 | |
| 3124 | // Objective-C++ ARC: autorelease types don't require destruction. |
| 3125 | if (T->isObjCLifetimeType() && |
| 3126 | T.getObjCLifetime() == Qualifiers::OCL_Autoreleasing) |
| 3127 | return true; |
| 3128 | |
Richard Smith | ac71351 | 2012-12-08 02:53:02 +0000 | [diff] [blame] | 3129 | if (CXXRecordDecl *RD = C.getBaseElementType(T)->getAsCXXRecordDecl()) |
| 3130 | return RD->hasTrivialDestructor(); |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3131 | return false; |
| 3132 | // TODO: Propagate nothrowness for implicitly declared special members. |
| 3133 | case UTT_HasNothrowAssign: |
| 3134 | // http://gcc.gnu.org/onlinedocs/gcc/Type-Traits.html: |
| 3135 | // If type is const qualified or is a reference type then the |
| 3136 | // trait is false. Otherwise if __has_trivial_assign (type) |
| 3137 | // is true then the trait is true, else if type is a cv class |
| 3138 | // or union type with copy assignment operators that are known |
| 3139 | // not to throw an exception then the trait is true, else it is |
| 3140 | // false. |
| 3141 | if (C.getBaseElementType(T).isConstQualified()) |
| 3142 | return false; |
| 3143 | if (T->isReferenceType()) |
| 3144 | return false; |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 3145 | if (T.isPODType(Self.Context) || T->isObjCLifetimeType()) |
| 3146 | return true; |
Richard Smith | ac71351 | 2012-12-08 02:53:02 +0000 | [diff] [blame] | 3147 | if (CXXRecordDecl *RD = T->getAsCXXRecordDecl()) { |
| 3148 | if (RD->hasTrivialCopyAssignment() && !RD->hasNonTrivialCopyAssignment()) |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3149 | return true; |
| 3150 | |
| 3151 | bool FoundAssign = false; |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3152 | DeclarationName Name = C.DeclarationNames.getCXXOperatorName(OO_Equal); |
Sebastian Redl | f8aca86 | 2010-09-14 23:40:14 +0000 | [diff] [blame] | 3153 | LookupResult Res(Self, DeclarationNameInfo(Name, KeyLoc), |
| 3154 | Sema::LookupOrdinaryName); |
| 3155 | if (Self.LookupQualifiedName(Res, RD)) { |
Douglas Gregor | d41679d | 2011-10-12 15:40:49 +0000 | [diff] [blame] | 3156 | Res.suppressDiagnostics(); |
Sebastian Redl | f8aca86 | 2010-09-14 23:40:14 +0000 | [diff] [blame] | 3157 | for (LookupResult::iterator Op = Res.begin(), OpEnd = Res.end(); |
| 3158 | Op != OpEnd; ++Op) { |
Douglas Gregor | d41679d | 2011-10-12 15:40:49 +0000 | [diff] [blame] | 3159 | if (isa<FunctionTemplateDecl>(*Op)) |
| 3160 | continue; |
| 3161 | |
Sebastian Redl | f8aca86 | 2010-09-14 23:40:14 +0000 | [diff] [blame] | 3162 | CXXMethodDecl *Operator = cast<CXXMethodDecl>(*Op); |
| 3163 | if (Operator->isCopyAssignmentOperator()) { |
| 3164 | FoundAssign = true; |
| 3165 | const FunctionProtoType *CPT |
| 3166 | = Operator->getType()->getAs<FunctionProtoType>(); |
Richard Smith | e6975e9 | 2012-04-17 00:58:00 +0000 | [diff] [blame] | 3167 | CPT = Self.ResolveExceptionSpec(KeyLoc, CPT); |
| 3168 | if (!CPT) |
| 3169 | return false; |
Richard Smith | 7a614d8 | 2011-06-11 17:19:42 +0000 | [diff] [blame] | 3170 | if (!CPT->isNothrow(Self.Context)) |
| 3171 | return false; |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3172 | } |
| 3173 | } |
| 3174 | } |
Douglas Gregor | d41679d | 2011-10-12 15:40:49 +0000 | [diff] [blame] | 3175 | |
Richard Smith | 7a614d8 | 2011-06-11 17:19:42 +0000 | [diff] [blame] | 3176 | return FoundAssign; |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3177 | } |
| 3178 | return false; |
| 3179 | case UTT_HasNothrowCopy: |
| 3180 | // http://gcc.gnu.org/onlinedocs/gcc/Type-Traits.html: |
| 3181 | // If __has_trivial_copy (type) is true then the trait is true, else |
| 3182 | // if type is a cv class or union type with copy constructors that are |
| 3183 | // known not to throw an exception then the trait is true, else it is |
| 3184 | // false. |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 3185 | if (T.isPODType(C) || T->isReferenceType() || T->isObjCLifetimeType()) |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3186 | return true; |
Richard Smith | ac71351 | 2012-12-08 02:53:02 +0000 | [diff] [blame] | 3187 | if (CXXRecordDecl *RD = T->getAsCXXRecordDecl()) { |
| 3188 | if (RD->hasTrivialCopyConstructor() && |
| 3189 | !RD->hasNonTrivialCopyConstructor()) |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3190 | return true; |
| 3191 | |
| 3192 | bool FoundConstructor = false; |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3193 | unsigned FoundTQs; |
David Blaikie | 3bc93e3 | 2012-12-19 00:45:41 +0000 | [diff] [blame] | 3194 | DeclContext::lookup_const_result R = Self.LookupConstructors(RD); |
| 3195 | for (DeclContext::lookup_const_iterator Con = R.begin(), |
| 3196 | ConEnd = R.end(); Con != ConEnd; ++Con) { |
Sebastian Redl | 08295a5 | 2010-09-13 22:18:28 +0000 | [diff] [blame] | 3197 | // A template constructor is never a copy constructor. |
| 3198 | // FIXME: However, it may actually be selected at the actual overload |
| 3199 | // resolution point. |
| 3200 | if (isa<FunctionTemplateDecl>(*Con)) |
| 3201 | continue; |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3202 | CXXConstructorDecl *Constructor = cast<CXXConstructorDecl>(*Con); |
| 3203 | if (Constructor->isCopyConstructor(FoundTQs)) { |
| 3204 | FoundConstructor = true; |
| 3205 | const FunctionProtoType *CPT |
| 3206 | = Constructor->getType()->getAs<FunctionProtoType>(); |
Richard Smith | e6975e9 | 2012-04-17 00:58:00 +0000 | [diff] [blame] | 3207 | CPT = Self.ResolveExceptionSpec(KeyLoc, CPT); |
| 3208 | if (!CPT) |
| 3209 | return false; |
Sebastian Redl | 60618fa | 2011-03-12 11:50:43 +0000 | [diff] [blame] | 3210 | // FIXME: check whether evaluating default arguments can throw. |
Sebastian Redl | 751025d | 2010-09-13 22:02:47 +0000 | [diff] [blame] | 3211 | // For now, we'll be conservative and assume that they can throw. |
Richard Smith | 7a614d8 | 2011-06-11 17:19:42 +0000 | [diff] [blame] | 3212 | if (!CPT->isNothrow(Self.Context) || CPT->getNumArgs() > 1) |
| 3213 | return false; |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3214 | } |
| 3215 | } |
| 3216 | |
Richard Smith | 7a614d8 | 2011-06-11 17:19:42 +0000 | [diff] [blame] | 3217 | return FoundConstructor; |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3218 | } |
| 3219 | return false; |
| 3220 | case UTT_HasNothrowConstructor: |
| 3221 | // http://gcc.gnu.org/onlinedocs/gcc/Type-Traits.html: |
| 3222 | // If __has_trivial_constructor (type) is true then the trait is |
| 3223 | // true, else if type is a cv class or union type (or array |
| 3224 | // thereof) with a default constructor that is known not to |
| 3225 | // throw an exception then the trait is true, else it is false. |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 3226 | if (T.isPODType(C) || T->isObjCLifetimeType()) |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3227 | return true; |
Richard Smith | ac71351 | 2012-12-08 02:53:02 +0000 | [diff] [blame] | 3228 | if (CXXRecordDecl *RD = C.getBaseElementType(T)->getAsCXXRecordDecl()) { |
| 3229 | if (RD->hasTrivialDefaultConstructor() && |
| 3230 | !RD->hasNonTrivialDefaultConstructor()) |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3231 | return true; |
| 3232 | |
David Blaikie | 3bc93e3 | 2012-12-19 00:45:41 +0000 | [diff] [blame] | 3233 | DeclContext::lookup_const_result R = Self.LookupConstructors(RD); |
| 3234 | for (DeclContext::lookup_const_iterator Con = R.begin(), |
| 3235 | ConEnd = R.end(); Con != ConEnd; ++Con) { |
Sebastian Redl | 08295a5 | 2010-09-13 22:18:28 +0000 | [diff] [blame] | 3236 | // FIXME: In C++0x, a constructor template can be a default constructor. |
| 3237 | if (isa<FunctionTemplateDecl>(*Con)) |
| 3238 | continue; |
Sebastian Redl | 751025d | 2010-09-13 22:02:47 +0000 | [diff] [blame] | 3239 | CXXConstructorDecl *Constructor = cast<CXXConstructorDecl>(*Con); |
| 3240 | if (Constructor->isDefaultConstructor()) { |
| 3241 | const FunctionProtoType *CPT |
| 3242 | = Constructor->getType()->getAs<FunctionProtoType>(); |
Richard Smith | e6975e9 | 2012-04-17 00:58:00 +0000 | [diff] [blame] | 3243 | CPT = Self.ResolveExceptionSpec(KeyLoc, CPT); |
| 3244 | if (!CPT) |
| 3245 | return false; |
Sebastian Redl | 751025d | 2010-09-13 22:02:47 +0000 | [diff] [blame] | 3246 | // TODO: check whether evaluating default arguments can throw. |
| 3247 | // For now, we'll be conservative and assume that they can throw. |
Sebastian Redl | 8026f6d | 2011-03-13 17:09:40 +0000 | [diff] [blame] | 3248 | return CPT->isNothrow(Self.Context) && CPT->getNumArgs() == 0; |
Sebastian Redl | 751025d | 2010-09-13 22:02:47 +0000 | [diff] [blame] | 3249 | } |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3250 | } |
| 3251 | } |
| 3252 | return false; |
| 3253 | case UTT_HasVirtualDestructor: |
| 3254 | // http://gcc.gnu.org/onlinedocs/gcc/Type-Traits.html: |
| 3255 | // If type is a class type with a virtual destructor ([class.dtor]) |
| 3256 | // then the trait is true, else it is false. |
Richard Smith | ac71351 | 2012-12-08 02:53:02 +0000 | [diff] [blame] | 3257 | if (CXXRecordDecl *RD = T->getAsCXXRecordDecl()) |
Sebastian Redl | f8aca86 | 2010-09-14 23:40:14 +0000 | [diff] [blame] | 3258 | if (CXXDestructorDecl *Destructor = Self.LookupDestructor(RD)) |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3259 | return Destructor->isVirtual(); |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3260 | return false; |
Chandler Carruth | c41d6b5 | 2011-05-01 06:11:07 +0000 | [diff] [blame] | 3261 | |
| 3262 | // These type trait expressions are modeled on the specifications for the |
| 3263 | // Embarcadero C++0x type trait functions: |
| 3264 | // http://docwiki.embarcadero.com/RADStudio/XE/en/Type_Trait_Functions_(C%2B%2B0x)_Index |
| 3265 | case UTT_IsCompleteType: |
| 3266 | // http://docwiki.embarcadero.com/RADStudio/XE/en/Is_complete_type_(typename_T_): |
| 3267 | // Returns True if and only if T is a complete type at the point of the |
| 3268 | // function call. |
| 3269 | return !T->isIncompleteType(); |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3270 | } |
Chandler Carruth | 83f563c | 2011-05-01 07:44:17 +0000 | [diff] [blame] | 3271 | llvm_unreachable("Type trait not covered by switch"); |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3272 | } |
| 3273 | |
| 3274 | ExprResult Sema::BuildUnaryTypeTrait(UnaryTypeTrait UTT, |
Douglas Gregor | 3d37c0a | 2010-09-09 16:14:44 +0000 | [diff] [blame] | 3275 | SourceLocation KWLoc, |
| 3276 | TypeSourceInfo *TSInfo, |
| 3277 | SourceLocation RParen) { |
| 3278 | QualType T = TSInfo->getType(); |
Chandler Carruth | eb65a10 | 2011-04-30 10:07:32 +0000 | [diff] [blame] | 3279 | if (!CheckUnaryTypeTraitTypeCompleteness(*this, UTT, KWLoc, T)) |
| 3280 | return ExprError(); |
Sebastian Redl | 64b45f7 | 2009-01-05 20:52:13 +0000 | [diff] [blame] | 3281 | |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3282 | bool Value = false; |
| 3283 | if (!T->isDependentType()) |
Chandler Carruth | ccb4ecf | 2011-05-01 06:51:22 +0000 | [diff] [blame] | 3284 | Value = EvaluateUnaryTypeTrait(*this, UTT, KWLoc, T); |
Sebastian Redl | 0dfd848 | 2010-09-13 20:56:31 +0000 | [diff] [blame] | 3285 | |
| 3286 | return Owned(new (Context) UnaryTypeTraitExpr(KWLoc, UTT, TSInfo, Value, |
Anders Carlsson | 3292d5c | 2009-07-07 19:06:02 +0000 | [diff] [blame] | 3287 | RParen, Context.BoolTy)); |
Sebastian Redl | 64b45f7 | 2009-01-05 20:52:13 +0000 | [diff] [blame] | 3288 | } |
Sebastian Redl | 7c8bd60 | 2009-02-07 20:10:22 +0000 | [diff] [blame] | 3289 | |
Francois Pichet | 6ad6f28 | 2010-12-07 00:08:36 +0000 | [diff] [blame] | 3290 | ExprResult Sema::ActOnBinaryTypeTrait(BinaryTypeTrait BTT, |
| 3291 | SourceLocation KWLoc, |
| 3292 | ParsedType LhsTy, |
| 3293 | ParsedType RhsTy, |
| 3294 | SourceLocation RParen) { |
| 3295 | TypeSourceInfo *LhsTSInfo; |
| 3296 | QualType LhsT = GetTypeFromParser(LhsTy, &LhsTSInfo); |
| 3297 | if (!LhsTSInfo) |
| 3298 | LhsTSInfo = Context.getTrivialTypeSourceInfo(LhsT); |
| 3299 | |
| 3300 | TypeSourceInfo *RhsTSInfo; |
| 3301 | QualType RhsT = GetTypeFromParser(RhsTy, &RhsTSInfo); |
| 3302 | if (!RhsTSInfo) |
| 3303 | RhsTSInfo = Context.getTrivialTypeSourceInfo(RhsT); |
| 3304 | |
| 3305 | return BuildBinaryTypeTrait(BTT, KWLoc, LhsTSInfo, RhsTSInfo, RParen); |
| 3306 | } |
| 3307 | |
Douglas Gregor | 14b2327 | 2012-06-29 00:49:17 +0000 | [diff] [blame] | 3308 | /// \brief Determine whether T has a non-trivial Objective-C lifetime in |
| 3309 | /// ARC mode. |
| 3310 | static bool hasNontrivialObjCLifetime(QualType T) { |
| 3311 | switch (T.getObjCLifetime()) { |
| 3312 | case Qualifiers::OCL_ExplicitNone: |
| 3313 | return false; |
| 3314 | |
| 3315 | case Qualifiers::OCL_Strong: |
| 3316 | case Qualifiers::OCL_Weak: |
| 3317 | case Qualifiers::OCL_Autoreleasing: |
| 3318 | return true; |
| 3319 | |
| 3320 | case Qualifiers::OCL_None: |
| 3321 | return T->isObjCLifetimeType(); |
| 3322 | } |
| 3323 | |
| 3324 | llvm_unreachable("Unknown ObjC lifetime qualifier"); |
| 3325 | } |
| 3326 | |
Douglas Gregor | 4ca8ac2 | 2012-02-24 07:38:34 +0000 | [diff] [blame] | 3327 | static bool evaluateTypeTrait(Sema &S, TypeTrait Kind, SourceLocation KWLoc, |
| 3328 | ArrayRef<TypeSourceInfo *> Args, |
| 3329 | SourceLocation RParenLoc) { |
| 3330 | switch (Kind) { |
| 3331 | case clang::TT_IsTriviallyConstructible: { |
| 3332 | // C++11 [meta.unary.prop]: |
Dmitri Gribenko | 62348f0 | 2012-02-24 20:03:35 +0000 | [diff] [blame] | 3333 | // is_trivially_constructible is defined as: |
Douglas Gregor | 4ca8ac2 | 2012-02-24 07:38:34 +0000 | [diff] [blame] | 3334 | // |
Dmitri Gribenko | 62348f0 | 2012-02-24 20:03:35 +0000 | [diff] [blame] | 3335 | // is_constructible<T, Args...>::value is true and the variable |
| 3336 | // definition for is_constructible, as defined below, is known to call no |
| 3337 | // operation that is not trivial. |
Douglas Gregor | 4ca8ac2 | 2012-02-24 07:38:34 +0000 | [diff] [blame] | 3338 | // |
| 3339 | // The predicate condition for a template specialization |
| 3340 | // is_constructible<T, Args...> shall be satisfied if and only if the |
| 3341 | // following variable definition would be well-formed for some invented |
| 3342 | // variable t: |
| 3343 | // |
| 3344 | // T t(create<Args>()...); |
| 3345 | if (Args.empty()) { |
| 3346 | S.Diag(KWLoc, diag::err_type_trait_arity) |
| 3347 | << 1 << 1 << 1 << (int)Args.size(); |
| 3348 | return false; |
| 3349 | } |
| 3350 | |
| 3351 | bool SawVoid = false; |
| 3352 | for (unsigned I = 0, N = Args.size(); I != N; ++I) { |
| 3353 | if (Args[I]->getType()->isVoidType()) { |
| 3354 | SawVoid = true; |
| 3355 | continue; |
| 3356 | } |
| 3357 | |
| 3358 | if (!Args[I]->getType()->isIncompleteType() && |
| 3359 | S.RequireCompleteType(KWLoc, Args[I]->getType(), |
| 3360 | diag::err_incomplete_type_used_in_type_trait_expr)) |
| 3361 | return false; |
| 3362 | } |
| 3363 | |
| 3364 | // If any argument was 'void', of course it won't type-check. |
| 3365 | if (SawVoid) |
| 3366 | return false; |
| 3367 | |
| 3368 | llvm::SmallVector<OpaqueValueExpr, 2> OpaqueArgExprs; |
| 3369 | llvm::SmallVector<Expr *, 2> ArgExprs; |
| 3370 | ArgExprs.reserve(Args.size() - 1); |
| 3371 | for (unsigned I = 1, N = Args.size(); I != N; ++I) { |
| 3372 | QualType T = Args[I]->getType(); |
| 3373 | if (T->isObjectType() || T->isFunctionType()) |
| 3374 | T = S.Context.getRValueReferenceType(T); |
| 3375 | OpaqueArgExprs.push_back( |
Daniel Dunbar | 96a0014 | 2012-03-09 18:35:03 +0000 | [diff] [blame] | 3376 | OpaqueValueExpr(Args[I]->getTypeLoc().getLocStart(), |
Douglas Gregor | 4ca8ac2 | 2012-02-24 07:38:34 +0000 | [diff] [blame] | 3377 | T.getNonLValueExprType(S.Context), |
| 3378 | Expr::getValueKindForType(T))); |
| 3379 | ArgExprs.push_back(&OpaqueArgExprs.back()); |
| 3380 | } |
| 3381 | |
| 3382 | // Perform the initialization in an unevaluated context within a SFINAE |
| 3383 | // trap at translation unit scope. |
| 3384 | EnterExpressionEvaluationContext Unevaluated(S, Sema::Unevaluated); |
| 3385 | Sema::SFINAETrap SFINAE(S, /*AccessCheckingSFINAE=*/true); |
| 3386 | Sema::ContextRAII TUContext(S, S.Context.getTranslationUnitDecl()); |
| 3387 | InitializedEntity To(InitializedEntity::InitializeTemporary(Args[0])); |
| 3388 | InitializationKind InitKind(InitializationKind::CreateDirect(KWLoc, KWLoc, |
| 3389 | RParenLoc)); |
| 3390 | InitializationSequence Init(S, To, InitKind, |
| 3391 | ArgExprs.begin(), ArgExprs.size()); |
| 3392 | if (Init.Failed()) |
| 3393 | return false; |
| 3394 | |
Benjamin Kramer | 5354e77 | 2012-08-23 23:38:35 +0000 | [diff] [blame] | 3395 | ExprResult Result = Init.Perform(S, To, InitKind, ArgExprs); |
Douglas Gregor | 4ca8ac2 | 2012-02-24 07:38:34 +0000 | [diff] [blame] | 3396 | if (Result.isInvalid() || SFINAE.hasErrorOccurred()) |
| 3397 | return false; |
Douglas Gregor | 14b2327 | 2012-06-29 00:49:17 +0000 | [diff] [blame] | 3398 | |
| 3399 | // Under Objective-C ARC, if the destination has non-trivial Objective-C |
| 3400 | // lifetime, this is a non-trivial construction. |
| 3401 | if (S.getLangOpts().ObjCAutoRefCount && |
| 3402 | hasNontrivialObjCLifetime(Args[0]->getType().getNonReferenceType())) |
| 3403 | return false; |
| 3404 | |
| 3405 | // The initialization succeeded; now make sure there are no non-trivial |
Douglas Gregor | 4ca8ac2 | 2012-02-24 07:38:34 +0000 | [diff] [blame] | 3406 | // calls. |
| 3407 | return !Result.get()->hasNonTrivialCall(S.Context); |
| 3408 | } |
| 3409 | } |
| 3410 | |
| 3411 | return false; |
| 3412 | } |
| 3413 | |
| 3414 | ExprResult Sema::BuildTypeTrait(TypeTrait Kind, SourceLocation KWLoc, |
| 3415 | ArrayRef<TypeSourceInfo *> Args, |
| 3416 | SourceLocation RParenLoc) { |
| 3417 | bool Dependent = false; |
| 3418 | for (unsigned I = 0, N = Args.size(); I != N; ++I) { |
| 3419 | if (Args[I]->getType()->isDependentType()) { |
| 3420 | Dependent = true; |
| 3421 | break; |
| 3422 | } |
| 3423 | } |
| 3424 | |
| 3425 | bool Value = false; |
| 3426 | if (!Dependent) |
| 3427 | Value = evaluateTypeTrait(*this, Kind, KWLoc, Args, RParenLoc); |
| 3428 | |
| 3429 | return TypeTraitExpr::Create(Context, Context.BoolTy, KWLoc, Kind, |
| 3430 | Args, RParenLoc, Value); |
| 3431 | } |
| 3432 | |
| 3433 | ExprResult Sema::ActOnTypeTrait(TypeTrait Kind, SourceLocation KWLoc, |
| 3434 | ArrayRef<ParsedType> Args, |
| 3435 | SourceLocation RParenLoc) { |
| 3436 | llvm::SmallVector<TypeSourceInfo *, 4> ConvertedArgs; |
| 3437 | ConvertedArgs.reserve(Args.size()); |
| 3438 | |
| 3439 | for (unsigned I = 0, N = Args.size(); I != N; ++I) { |
| 3440 | TypeSourceInfo *TInfo; |
| 3441 | QualType T = GetTypeFromParser(Args[I], &TInfo); |
| 3442 | if (!TInfo) |
| 3443 | TInfo = Context.getTrivialTypeSourceInfo(T, KWLoc); |
| 3444 | |
| 3445 | ConvertedArgs.push_back(TInfo); |
| 3446 | } |
| 3447 | |
| 3448 | return BuildTypeTrait(Kind, KWLoc, ConvertedArgs, RParenLoc); |
| 3449 | } |
| 3450 | |
Francois Pichet | 6ad6f28 | 2010-12-07 00:08:36 +0000 | [diff] [blame] | 3451 | static bool EvaluateBinaryTypeTrait(Sema &Self, BinaryTypeTrait BTT, |
| 3452 | QualType LhsT, QualType RhsT, |
| 3453 | SourceLocation KeyLoc) { |
Chandler Carruth | d064c70 | 2011-05-01 08:41:10 +0000 | [diff] [blame] | 3454 | assert(!LhsT->isDependentType() && !RhsT->isDependentType() && |
| 3455 | "Cannot evaluate traits of dependent types"); |
Francois Pichet | 6ad6f28 | 2010-12-07 00:08:36 +0000 | [diff] [blame] | 3456 | |
| 3457 | switch(BTT) { |
John McCall | d89d30f | 2011-01-28 22:02:36 +0000 | [diff] [blame] | 3458 | case BTT_IsBaseOf: { |
Francois Pichet | 6ad6f28 | 2010-12-07 00:08:36 +0000 | [diff] [blame] | 3459 | // C++0x [meta.rel]p2 |
John McCall | d89d30f | 2011-01-28 22:02:36 +0000 | [diff] [blame] | 3460 | // Base is a base class of Derived without regard to cv-qualifiers or |
Francois Pichet | 6ad6f28 | 2010-12-07 00:08:36 +0000 | [diff] [blame] | 3461 | // Base and Derived are not unions and name the same class type without |
| 3462 | // regard to cv-qualifiers. |
Francois Pichet | 6ad6f28 | 2010-12-07 00:08:36 +0000 | [diff] [blame] | 3463 | |
John McCall | d89d30f | 2011-01-28 22:02:36 +0000 | [diff] [blame] | 3464 | const RecordType *lhsRecord = LhsT->getAs<RecordType>(); |
| 3465 | if (!lhsRecord) return false; |
| 3466 | |
| 3467 | const RecordType *rhsRecord = RhsT->getAs<RecordType>(); |
| 3468 | if (!rhsRecord) return false; |
| 3469 | |
| 3470 | assert(Self.Context.hasSameUnqualifiedType(LhsT, RhsT) |
| 3471 | == (lhsRecord == rhsRecord)); |
| 3472 | |
| 3473 | if (lhsRecord == rhsRecord) |
| 3474 | return !lhsRecord->getDecl()->isUnion(); |
| 3475 | |
| 3476 | // C++0x [meta.rel]p2: |
| 3477 | // If Base and Derived are class types and are different types |
| 3478 | // (ignoring possible cv-qualifiers) then Derived shall be a |
| 3479 | // complete type. |
| 3480 | if (Self.RequireCompleteType(KeyLoc, RhsT, |
| 3481 | diag::err_incomplete_type_used_in_type_trait_expr)) |
| 3482 | return false; |
| 3483 | |
| 3484 | return cast<CXXRecordDecl>(rhsRecord->getDecl()) |
| 3485 | ->isDerivedFrom(cast<CXXRecordDecl>(lhsRecord->getDecl())); |
| 3486 | } |
John Wiegley | 20c0da7 | 2011-04-27 23:09:49 +0000 | [diff] [blame] | 3487 | case BTT_IsSame: |
| 3488 | return Self.Context.hasSameType(LhsT, RhsT); |
Francois Pichet | f187237 | 2010-12-08 22:35:30 +0000 | [diff] [blame] | 3489 | case BTT_TypeCompatible: |
| 3490 | return Self.Context.typesAreCompatible(LhsT.getUnqualifiedType(), |
| 3491 | RhsT.getUnqualifiedType()); |
John Wiegley | 20c0da7 | 2011-04-27 23:09:49 +0000 | [diff] [blame] | 3492 | case BTT_IsConvertible: |
Douglas Gregor | 9f36113 | 2011-01-27 20:28:01 +0000 | [diff] [blame] | 3493 | case BTT_IsConvertibleTo: { |
| 3494 | // C++0x [meta.rel]p4: |
| 3495 | // Given the following function prototype: |
| 3496 | // |
| 3497 | // template <class T> |
| 3498 | // typename add_rvalue_reference<T>::type create(); |
| 3499 | // |
| 3500 | // the predicate condition for a template specialization |
| 3501 | // is_convertible<From, To> shall be satisfied if and only if |
| 3502 | // the return expression in the following code would be |
| 3503 | // well-formed, including any implicit conversions to the return |
| 3504 | // type of the function: |
| 3505 | // |
| 3506 | // To test() { |
| 3507 | // return create<From>(); |
| 3508 | // } |
| 3509 | // |
| 3510 | // Access checking is performed as if in a context unrelated to To and |
| 3511 | // From. Only the validity of the immediate context of the expression |
| 3512 | // of the return-statement (including conversions to the return type) |
| 3513 | // is considered. |
| 3514 | // |
| 3515 | // We model the initialization as a copy-initialization of a temporary |
| 3516 | // of the appropriate type, which for this expression is identical to the |
| 3517 | // return statement (since NRVO doesn't apply). |
Eli Friedman | 2217f85 | 2012-08-14 02:06:07 +0000 | [diff] [blame] | 3518 | |
| 3519 | // Functions aren't allowed to return function or array types. |
| 3520 | if (RhsT->isFunctionType() || RhsT->isArrayType()) |
| 3521 | return false; |
| 3522 | |
| 3523 | // A return statement in a void function must have void type. |
| 3524 | if (RhsT->isVoidType()) |
| 3525 | return LhsT->isVoidType(); |
| 3526 | |
| 3527 | // A function definition requires a complete, non-abstract return type. |
| 3528 | if (Self.RequireCompleteType(KeyLoc, RhsT, 0) || |
| 3529 | Self.RequireNonAbstractType(KeyLoc, RhsT, 0)) |
| 3530 | return false; |
| 3531 | |
| 3532 | // Compute the result of add_rvalue_reference. |
Douglas Gregor | 9f36113 | 2011-01-27 20:28:01 +0000 | [diff] [blame] | 3533 | if (LhsT->isObjectType() || LhsT->isFunctionType()) |
| 3534 | LhsT = Self.Context.getRValueReferenceType(LhsT); |
Eli Friedman | 2217f85 | 2012-08-14 02:06:07 +0000 | [diff] [blame] | 3535 | |
| 3536 | // Build a fake source and destination for initialization. |
Douglas Gregor | 9f36113 | 2011-01-27 20:28:01 +0000 | [diff] [blame] | 3537 | InitializedEntity To(InitializedEntity::InitializeTemporary(RhsT)); |
Douglas Gregor | b608b98 | 2011-01-28 02:26:04 +0000 | [diff] [blame] | 3538 | OpaqueValueExpr From(KeyLoc, LhsT.getNonLValueExprType(Self.Context), |
Douglas Gregor | 9f36113 | 2011-01-27 20:28:01 +0000 | [diff] [blame] | 3539 | Expr::getValueKindForType(LhsT)); |
| 3540 | Expr *FromPtr = &From; |
| 3541 | InitializationKind Kind(InitializationKind::CreateCopy(KeyLoc, |
| 3542 | SourceLocation())); |
| 3543 | |
Eli Friedman | 3add9f0 | 2012-01-25 01:05:57 +0000 | [diff] [blame] | 3544 | // Perform the initialization in an unevaluated context within a SFINAE |
| 3545 | // trap at translation unit scope. |
| 3546 | EnterExpressionEvaluationContext Unevaluated(Self, Sema::Unevaluated); |
Douglas Gregor | 1eee5dc | 2011-01-27 22:31:44 +0000 | [diff] [blame] | 3547 | Sema::SFINAETrap SFINAE(Self, /*AccessCheckingSFINAE=*/true); |
| 3548 | Sema::ContextRAII TUContext(Self, Self.Context.getTranslationUnitDecl()); |
Douglas Gregor | 9f36113 | 2011-01-27 20:28:01 +0000 | [diff] [blame] | 3549 | InitializationSequence Init(Self, To, Kind, &FromPtr, 1); |
Sebastian Redl | 383616c | 2011-06-05 12:23:28 +0000 | [diff] [blame] | 3550 | if (Init.Failed()) |
Douglas Gregor | 9f36113 | 2011-01-27 20:28:01 +0000 | [diff] [blame] | 3551 | return false; |
Douglas Gregor | 1eee5dc | 2011-01-27 22:31:44 +0000 | [diff] [blame] | 3552 | |
Benjamin Kramer | 5354e77 | 2012-08-23 23:38:35 +0000 | [diff] [blame] | 3553 | ExprResult Result = Init.Perform(Self, To, Kind, FromPtr); |
Douglas Gregor | 9f36113 | 2011-01-27 20:28:01 +0000 | [diff] [blame] | 3554 | return !Result.isInvalid() && !SFINAE.hasErrorOccurred(); |
| 3555 | } |
Douglas Gregor | 25d0a0f | 2012-02-23 07:33:15 +0000 | [diff] [blame] | 3556 | |
| 3557 | case BTT_IsTriviallyAssignable: { |
| 3558 | // C++11 [meta.unary.prop]p3: |
| 3559 | // is_trivially_assignable is defined as: |
| 3560 | // is_assignable<T, U>::value is true and the assignment, as defined by |
| 3561 | // is_assignable, is known to call no operation that is not trivial |
| 3562 | // |
| 3563 | // is_assignable is defined as: |
| 3564 | // The expression declval<T>() = declval<U>() is well-formed when |
| 3565 | // treated as an unevaluated operand (Clause 5). |
| 3566 | // |
| 3567 | // For both, T and U shall be complete types, (possibly cv-qualified) |
| 3568 | // void, or arrays of unknown bound. |
| 3569 | if (!LhsT->isVoidType() && !LhsT->isIncompleteArrayType() && |
| 3570 | Self.RequireCompleteType(KeyLoc, LhsT, |
| 3571 | diag::err_incomplete_type_used_in_type_trait_expr)) |
| 3572 | return false; |
| 3573 | if (!RhsT->isVoidType() && !RhsT->isIncompleteArrayType() && |
| 3574 | Self.RequireCompleteType(KeyLoc, RhsT, |
| 3575 | diag::err_incomplete_type_used_in_type_trait_expr)) |
| 3576 | return false; |
| 3577 | |
| 3578 | // cv void is never assignable. |
| 3579 | if (LhsT->isVoidType() || RhsT->isVoidType()) |
| 3580 | return false; |
| 3581 | |
| 3582 | // Build expressions that emulate the effect of declval<T>() and |
| 3583 | // declval<U>(). |
| 3584 | if (LhsT->isObjectType() || LhsT->isFunctionType()) |
| 3585 | LhsT = Self.Context.getRValueReferenceType(LhsT); |
| 3586 | if (RhsT->isObjectType() || RhsT->isFunctionType()) |
| 3587 | RhsT = Self.Context.getRValueReferenceType(RhsT); |
| 3588 | OpaqueValueExpr Lhs(KeyLoc, LhsT.getNonLValueExprType(Self.Context), |
| 3589 | Expr::getValueKindForType(LhsT)); |
| 3590 | OpaqueValueExpr Rhs(KeyLoc, RhsT.getNonLValueExprType(Self.Context), |
| 3591 | Expr::getValueKindForType(RhsT)); |
| 3592 | |
| 3593 | // Attempt the assignment in an unevaluated context within a SFINAE |
| 3594 | // trap at translation unit scope. |
| 3595 | EnterExpressionEvaluationContext Unevaluated(Self, Sema::Unevaluated); |
| 3596 | Sema::SFINAETrap SFINAE(Self, /*AccessCheckingSFINAE=*/true); |
| 3597 | Sema::ContextRAII TUContext(Self, Self.Context.getTranslationUnitDecl()); |
| 3598 | ExprResult Result = Self.BuildBinOp(/*S=*/0, KeyLoc, BO_Assign, &Lhs, &Rhs); |
| 3599 | if (Result.isInvalid() || SFINAE.hasErrorOccurred()) |
| 3600 | return false; |
| 3601 | |
Douglas Gregor | 14b2327 | 2012-06-29 00:49:17 +0000 | [diff] [blame] | 3602 | // Under Objective-C ARC, if the destination has non-trivial Objective-C |
| 3603 | // lifetime, this is a non-trivial assignment. |
| 3604 | if (Self.getLangOpts().ObjCAutoRefCount && |
| 3605 | hasNontrivialObjCLifetime(LhsT.getNonReferenceType())) |
| 3606 | return false; |
| 3607 | |
Douglas Gregor | 25d0a0f | 2012-02-23 07:33:15 +0000 | [diff] [blame] | 3608 | return !Result.get()->hasNonTrivialCall(Self.Context); |
| 3609 | } |
Francois Pichet | 6ad6f28 | 2010-12-07 00:08:36 +0000 | [diff] [blame] | 3610 | } |
| 3611 | llvm_unreachable("Unknown type trait or not implemented"); |
| 3612 | } |
| 3613 | |
| 3614 | ExprResult Sema::BuildBinaryTypeTrait(BinaryTypeTrait BTT, |
| 3615 | SourceLocation KWLoc, |
| 3616 | TypeSourceInfo *LhsTSInfo, |
| 3617 | TypeSourceInfo *RhsTSInfo, |
| 3618 | SourceLocation RParen) { |
| 3619 | QualType LhsT = LhsTSInfo->getType(); |
| 3620 | QualType RhsT = RhsTSInfo->getType(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3621 | |
John McCall | d89d30f | 2011-01-28 22:02:36 +0000 | [diff] [blame] | 3622 | if (BTT == BTT_TypeCompatible) { |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 3623 | if (getLangOpts().CPlusPlus) { |
Francois Pichet | f187237 | 2010-12-08 22:35:30 +0000 | [diff] [blame] | 3624 | Diag(KWLoc, diag::err_types_compatible_p_in_cplusplus) |
| 3625 | << SourceRange(KWLoc, RParen); |
| 3626 | return ExprError(); |
| 3627 | } |
Francois Pichet | 6ad6f28 | 2010-12-07 00:08:36 +0000 | [diff] [blame] | 3628 | } |
| 3629 | |
| 3630 | bool Value = false; |
| 3631 | if (!LhsT->isDependentType() && !RhsT->isDependentType()) |
| 3632 | Value = EvaluateBinaryTypeTrait(*this, BTT, LhsT, RhsT, KWLoc); |
| 3633 | |
Francois Pichet | f187237 | 2010-12-08 22:35:30 +0000 | [diff] [blame] | 3634 | // Select trait result type. |
| 3635 | QualType ResultType; |
| 3636 | switch (BTT) { |
Francois Pichet | f187237 | 2010-12-08 22:35:30 +0000 | [diff] [blame] | 3637 | case BTT_IsBaseOf: ResultType = Context.BoolTy; break; |
John Wiegley | 20c0da7 | 2011-04-27 23:09:49 +0000 | [diff] [blame] | 3638 | case BTT_IsConvertible: ResultType = Context.BoolTy; break; |
| 3639 | case BTT_IsSame: ResultType = Context.BoolTy; break; |
Francois Pichet | f187237 | 2010-12-08 22:35:30 +0000 | [diff] [blame] | 3640 | case BTT_TypeCompatible: ResultType = Context.IntTy; break; |
Douglas Gregor | 9f36113 | 2011-01-27 20:28:01 +0000 | [diff] [blame] | 3641 | case BTT_IsConvertibleTo: ResultType = Context.BoolTy; break; |
Douglas Gregor | 25d0a0f | 2012-02-23 07:33:15 +0000 | [diff] [blame] | 3642 | case BTT_IsTriviallyAssignable: ResultType = Context.BoolTy; |
Francois Pichet | f187237 | 2010-12-08 22:35:30 +0000 | [diff] [blame] | 3643 | } |
| 3644 | |
Francois Pichet | 6ad6f28 | 2010-12-07 00:08:36 +0000 | [diff] [blame] | 3645 | return Owned(new (Context) BinaryTypeTraitExpr(KWLoc, BTT, LhsTSInfo, |
| 3646 | RhsTSInfo, Value, RParen, |
Francois Pichet | f187237 | 2010-12-08 22:35:30 +0000 | [diff] [blame] | 3647 | ResultType)); |
Francois Pichet | 6ad6f28 | 2010-12-07 00:08:36 +0000 | [diff] [blame] | 3648 | } |
| 3649 | |
John Wiegley | 21ff2e5 | 2011-04-28 00:16:57 +0000 | [diff] [blame] | 3650 | ExprResult Sema::ActOnArrayTypeTrait(ArrayTypeTrait ATT, |
| 3651 | SourceLocation KWLoc, |
| 3652 | ParsedType Ty, |
| 3653 | Expr* DimExpr, |
| 3654 | SourceLocation RParen) { |
| 3655 | TypeSourceInfo *TSInfo; |
| 3656 | QualType T = GetTypeFromParser(Ty, &TSInfo); |
| 3657 | if (!TSInfo) |
| 3658 | TSInfo = Context.getTrivialTypeSourceInfo(T); |
| 3659 | |
| 3660 | return BuildArrayTypeTrait(ATT, KWLoc, TSInfo, DimExpr, RParen); |
| 3661 | } |
| 3662 | |
| 3663 | static uint64_t EvaluateArrayTypeTrait(Sema &Self, ArrayTypeTrait ATT, |
| 3664 | QualType T, Expr *DimExpr, |
| 3665 | SourceLocation KeyLoc) { |
Chandler Carruth | d064c70 | 2011-05-01 08:41:10 +0000 | [diff] [blame] | 3666 | assert(!T->isDependentType() && "Cannot evaluate traits of dependent type"); |
John Wiegley | 21ff2e5 | 2011-04-28 00:16:57 +0000 | [diff] [blame] | 3667 | |
| 3668 | switch(ATT) { |
| 3669 | case ATT_ArrayRank: |
| 3670 | if (T->isArrayType()) { |
| 3671 | unsigned Dim = 0; |
| 3672 | while (const ArrayType *AT = Self.Context.getAsArrayType(T)) { |
| 3673 | ++Dim; |
| 3674 | T = AT->getElementType(); |
| 3675 | } |
| 3676 | return Dim; |
John Wiegley | 21ff2e5 | 2011-04-28 00:16:57 +0000 | [diff] [blame] | 3677 | } |
John Wiegley | cf56641 | 2011-04-28 02:06:46 +0000 | [diff] [blame] | 3678 | return 0; |
| 3679 | |
John Wiegley | 21ff2e5 | 2011-04-28 00:16:57 +0000 | [diff] [blame] | 3680 | case ATT_ArrayExtent: { |
| 3681 | llvm::APSInt Value; |
| 3682 | uint64_t Dim; |
Richard Smith | 282e7e6 | 2012-02-04 09:53:13 +0000 | [diff] [blame] | 3683 | if (Self.VerifyIntegerConstantExpression(DimExpr, &Value, |
Douglas Gregor | ab41fe9 | 2012-05-04 22:38:52 +0000 | [diff] [blame] | 3684 | diag::err_dimension_expr_not_constant_integer, |
Richard Smith | 282e7e6 | 2012-02-04 09:53:13 +0000 | [diff] [blame] | 3685 | false).isInvalid()) |
| 3686 | return 0; |
| 3687 | if (Value.isSigned() && Value.isNegative()) { |
Daniel Dunbar | e7d6ca0 | 2012-03-09 21:38:22 +0000 | [diff] [blame] | 3688 | Self.Diag(KeyLoc, diag::err_dimension_expr_not_constant_integer) |
| 3689 | << DimExpr->getSourceRange(); |
Richard Smith | 282e7e6 | 2012-02-04 09:53:13 +0000 | [diff] [blame] | 3690 | return 0; |
John Wiegley | cf56641 | 2011-04-28 02:06:46 +0000 | [diff] [blame] | 3691 | } |
Richard Smith | 282e7e6 | 2012-02-04 09:53:13 +0000 | [diff] [blame] | 3692 | Dim = Value.getLimitedValue(); |
John Wiegley | 21ff2e5 | 2011-04-28 00:16:57 +0000 | [diff] [blame] | 3693 | |
| 3694 | if (T->isArrayType()) { |
| 3695 | unsigned D = 0; |
| 3696 | bool Matched = false; |
| 3697 | while (const ArrayType *AT = Self.Context.getAsArrayType(T)) { |
| 3698 | if (Dim == D) { |
| 3699 | Matched = true; |
| 3700 | break; |
| 3701 | } |
| 3702 | ++D; |
| 3703 | T = AT->getElementType(); |
| 3704 | } |
| 3705 | |
John Wiegley | cf56641 | 2011-04-28 02:06:46 +0000 | [diff] [blame] | 3706 | if (Matched && T->isArrayType()) { |
| 3707 | if (const ConstantArrayType *CAT = Self.Context.getAsConstantArrayType(T)) |
| 3708 | return CAT->getSize().getLimitedValue(); |
| 3709 | } |
John Wiegley | 21ff2e5 | 2011-04-28 00:16:57 +0000 | [diff] [blame] | 3710 | } |
John Wiegley | cf56641 | 2011-04-28 02:06:46 +0000 | [diff] [blame] | 3711 | return 0; |
John Wiegley | 21ff2e5 | 2011-04-28 00:16:57 +0000 | [diff] [blame] | 3712 | } |
| 3713 | } |
| 3714 | llvm_unreachable("Unknown type trait or not implemented"); |
| 3715 | } |
| 3716 | |
| 3717 | ExprResult Sema::BuildArrayTypeTrait(ArrayTypeTrait ATT, |
| 3718 | SourceLocation KWLoc, |
| 3719 | TypeSourceInfo *TSInfo, |
| 3720 | Expr* DimExpr, |
| 3721 | SourceLocation RParen) { |
| 3722 | QualType T = TSInfo->getType(); |
John Wiegley | 21ff2e5 | 2011-04-28 00:16:57 +0000 | [diff] [blame] | 3723 | |
Chandler Carruth | af5a3c6 | 2011-05-01 08:48:21 +0000 | [diff] [blame] | 3724 | // FIXME: This should likely be tracked as an APInt to remove any host |
| 3725 | // assumptions about the width of size_t on the target. |
Chandler Carruth | d064c70 | 2011-05-01 08:41:10 +0000 | [diff] [blame] | 3726 | uint64_t Value = 0; |
| 3727 | if (!T->isDependentType()) |
| 3728 | Value = EvaluateArrayTypeTrait(*this, ATT, T, DimExpr, KWLoc); |
| 3729 | |
Chandler Carruth | af5a3c6 | 2011-05-01 08:48:21 +0000 | [diff] [blame] | 3730 | // While the specification for these traits from the Embarcadero C++ |
| 3731 | // compiler's documentation says the return type is 'unsigned int', Clang |
| 3732 | // returns 'size_t'. On Windows, the primary platform for the Embarcadero |
| 3733 | // compiler, there is no difference. On several other platforms this is an |
| 3734 | // important distinction. |
John Wiegley | 21ff2e5 | 2011-04-28 00:16:57 +0000 | [diff] [blame] | 3735 | return Owned(new (Context) ArrayTypeTraitExpr(KWLoc, ATT, TSInfo, Value, |
Chandler Carruth | 06207f6 | 2011-05-01 07:49:26 +0000 | [diff] [blame] | 3736 | DimExpr, RParen, |
Chandler Carruth | af5a3c6 | 2011-05-01 08:48:21 +0000 | [diff] [blame] | 3737 | Context.getSizeType())); |
John Wiegley | 21ff2e5 | 2011-04-28 00:16:57 +0000 | [diff] [blame] | 3738 | } |
| 3739 | |
John Wiegley | 5526220 | 2011-04-25 06:54:41 +0000 | [diff] [blame] | 3740 | ExprResult Sema::ActOnExpressionTrait(ExpressionTrait ET, |
Chandler Carruth | 4aa0af3 | 2011-05-01 07:44:20 +0000 | [diff] [blame] | 3741 | SourceLocation KWLoc, |
| 3742 | Expr *Queried, |
| 3743 | SourceLocation RParen) { |
John Wiegley | 5526220 | 2011-04-25 06:54:41 +0000 | [diff] [blame] | 3744 | // If error parsing the expression, ignore. |
| 3745 | if (!Queried) |
Chandler Carruth | 4aa0af3 | 2011-05-01 07:44:20 +0000 | [diff] [blame] | 3746 | return ExprError(); |
John Wiegley | 5526220 | 2011-04-25 06:54:41 +0000 | [diff] [blame] | 3747 | |
Chandler Carruth | 4aa0af3 | 2011-05-01 07:44:20 +0000 | [diff] [blame] | 3748 | ExprResult Result = BuildExpressionTrait(ET, KWLoc, Queried, RParen); |
John Wiegley | 5526220 | 2011-04-25 06:54:41 +0000 | [diff] [blame] | 3749 | |
Benjamin Kramer | 3fe198b | 2012-08-23 21:35:17 +0000 | [diff] [blame] | 3750 | return Result; |
John Wiegley | 5526220 | 2011-04-25 06:54:41 +0000 | [diff] [blame] | 3751 | } |
| 3752 | |
Chandler Carruth | 4aa0af3 | 2011-05-01 07:44:20 +0000 | [diff] [blame] | 3753 | static bool EvaluateExpressionTrait(ExpressionTrait ET, Expr *E) { |
| 3754 | switch (ET) { |
| 3755 | case ET_IsLValueExpr: return E->isLValue(); |
| 3756 | case ET_IsRValueExpr: return E->isRValue(); |
| 3757 | } |
| 3758 | llvm_unreachable("Expression trait not covered by switch"); |
| 3759 | } |
| 3760 | |
John Wiegley | 5526220 | 2011-04-25 06:54:41 +0000 | [diff] [blame] | 3761 | ExprResult Sema::BuildExpressionTrait(ExpressionTrait ET, |
Chandler Carruth | 4aa0af3 | 2011-05-01 07:44:20 +0000 | [diff] [blame] | 3762 | SourceLocation KWLoc, |
| 3763 | Expr *Queried, |
| 3764 | SourceLocation RParen) { |
John Wiegley | 5526220 | 2011-04-25 06:54:41 +0000 | [diff] [blame] | 3765 | if (Queried->isTypeDependent()) { |
| 3766 | // Delay type-checking for type-dependent expressions. |
| 3767 | } else if (Queried->getType()->isPlaceholderType()) { |
| 3768 | ExprResult PE = CheckPlaceholderExpr(Queried); |
| 3769 | if (PE.isInvalid()) return ExprError(); |
| 3770 | return BuildExpressionTrait(ET, KWLoc, PE.take(), RParen); |
| 3771 | } |
| 3772 | |
Chandler Carruth | 4aa0af3 | 2011-05-01 07:44:20 +0000 | [diff] [blame] | 3773 | bool Value = EvaluateExpressionTrait(ET, Queried); |
Chandler Carruth | f7ef000 | 2011-05-01 08:48:19 +0000 | [diff] [blame] | 3774 | |
Chandler Carruth | 4aa0af3 | 2011-05-01 07:44:20 +0000 | [diff] [blame] | 3775 | return Owned(new (Context) ExpressionTraitExpr(KWLoc, ET, Queried, Value, |
| 3776 | RParen, Context.BoolTy)); |
John Wiegley | 5526220 | 2011-04-25 06:54:41 +0000 | [diff] [blame] | 3777 | } |
| 3778 | |
Richard Trieu | dd22509 | 2011-09-15 21:56:47 +0000 | [diff] [blame] | 3779 | QualType Sema::CheckPointerToMemberOperands(ExprResult &LHS, ExprResult &RHS, |
John McCall | f89e55a | 2010-11-18 06:31:45 +0000 | [diff] [blame] | 3780 | ExprValueKind &VK, |
| 3781 | SourceLocation Loc, |
| 3782 | bool isIndirect) { |
Richard Trieu | dd22509 | 2011-09-15 21:56:47 +0000 | [diff] [blame] | 3783 | assert(!LHS.get()->getType()->isPlaceholderType() && |
| 3784 | !RHS.get()->getType()->isPlaceholderType() && |
John McCall | ea4aba0 | 2011-06-30 17:15:34 +0000 | [diff] [blame] | 3785 | "placeholders should have been weeded out by now"); |
| 3786 | |
| 3787 | // The LHS undergoes lvalue conversions if this is ->*. |
| 3788 | if (isIndirect) { |
Richard Trieu | dd22509 | 2011-09-15 21:56:47 +0000 | [diff] [blame] | 3789 | LHS = DefaultLvalueConversion(LHS.take()); |
| 3790 | if (LHS.isInvalid()) return QualType(); |
John McCall | ea4aba0 | 2011-06-30 17:15:34 +0000 | [diff] [blame] | 3791 | } |
| 3792 | |
| 3793 | // The RHS always undergoes lvalue conversions. |
Richard Trieu | dd22509 | 2011-09-15 21:56:47 +0000 | [diff] [blame] | 3794 | RHS = DefaultLvalueConversion(RHS.take()); |
| 3795 | if (RHS.isInvalid()) return QualType(); |
John McCall | ea4aba0 | 2011-06-30 17:15:34 +0000 | [diff] [blame] | 3796 | |
Sebastian Redl | 7c8bd60 | 2009-02-07 20:10:22 +0000 | [diff] [blame] | 3797 | const char *OpSpelling = isIndirect ? "->*" : ".*"; |
| 3798 | // C++ 5.5p2 |
| 3799 | // The binary operator .* [p3: ->*] binds its second operand, which shall |
| 3800 | // be of type "pointer to member of T" (where T is a completely-defined |
| 3801 | // class type) [...] |
Richard Trieu | dd22509 | 2011-09-15 21:56:47 +0000 | [diff] [blame] | 3802 | QualType RHSType = RHS.get()->getType(); |
| 3803 | const MemberPointerType *MemPtr = RHSType->getAs<MemberPointerType>(); |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 3804 | if (!MemPtr) { |
Sebastian Redl | 7c8bd60 | 2009-02-07 20:10:22 +0000 | [diff] [blame] | 3805 | Diag(Loc, diag::err_bad_memptr_rhs) |
Richard Trieu | dd22509 | 2011-09-15 21:56:47 +0000 | [diff] [blame] | 3806 | << OpSpelling << RHSType << RHS.get()->getSourceRange(); |
Sebastian Redl | 7c8bd60 | 2009-02-07 20:10:22 +0000 | [diff] [blame] | 3807 | return QualType(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3808 | } |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 3809 | |
Sebastian Redl | 7c8bd60 | 2009-02-07 20:10:22 +0000 | [diff] [blame] | 3810 | QualType Class(MemPtr->getClass(), 0); |
| 3811 | |
Douglas Gregor | 7d520ba | 2010-10-13 20:41:14 +0000 | [diff] [blame] | 3812 | // Note: C++ [expr.mptr.oper]p2-3 says that the class type into which the |
| 3813 | // member pointer points must be completely-defined. However, there is no |
| 3814 | // reason for this semantic distinction, and the rule is not enforced by |
| 3815 | // other compilers. Therefore, we do not check this property, as it is |
| 3816 | // likely to be considered a defect. |
Sebastian Redl | 59fc269 | 2010-04-10 10:14:54 +0000 | [diff] [blame] | 3817 | |
Sebastian Redl | 7c8bd60 | 2009-02-07 20:10:22 +0000 | [diff] [blame] | 3818 | // C++ 5.5p2 |
| 3819 | // [...] to its first operand, which shall be of class T or of a class of |
| 3820 | // which T is an unambiguous and accessible base class. [p3: a pointer to |
| 3821 | // such a class] |
Richard Trieu | dd22509 | 2011-09-15 21:56:47 +0000 | [diff] [blame] | 3822 | QualType LHSType = LHS.get()->getType(); |
Sebastian Redl | 7c8bd60 | 2009-02-07 20:10:22 +0000 | [diff] [blame] | 3823 | if (isIndirect) { |
Richard Trieu | dd22509 | 2011-09-15 21:56:47 +0000 | [diff] [blame] | 3824 | if (const PointerType *Ptr = LHSType->getAs<PointerType>()) |
| 3825 | LHSType = Ptr->getPointeeType(); |
Sebastian Redl | 7c8bd60 | 2009-02-07 20:10:22 +0000 | [diff] [blame] | 3826 | else { |
| 3827 | Diag(Loc, diag::err_bad_memptr_lhs) |
Richard Trieu | dd22509 | 2011-09-15 21:56:47 +0000 | [diff] [blame] | 3828 | << OpSpelling << 1 << LHSType |
Douglas Gregor | 849b243 | 2010-03-31 17:46:05 +0000 | [diff] [blame] | 3829 | << FixItHint::CreateReplacement(SourceRange(Loc), ".*"); |
Sebastian Redl | 7c8bd60 | 2009-02-07 20:10:22 +0000 | [diff] [blame] | 3830 | return QualType(); |
| 3831 | } |
| 3832 | } |
| 3833 | |
Richard Trieu | dd22509 | 2011-09-15 21:56:47 +0000 | [diff] [blame] | 3834 | if (!Context.hasSameUnqualifiedType(Class, LHSType)) { |
Sebastian Redl | 17e1d35 | 2010-04-23 17:18:26 +0000 | [diff] [blame] | 3835 | // If we want to check the hierarchy, we need a complete type. |
Douglas Gregor | d10099e | 2012-05-04 16:32:21 +0000 | [diff] [blame] | 3836 | if (RequireCompleteType(Loc, LHSType, diag::err_bad_memptr_lhs, |
| 3837 | OpSpelling, (int)isIndirect)) { |
Sebastian Redl | 17e1d35 | 2010-04-23 17:18:26 +0000 | [diff] [blame] | 3838 | return QualType(); |
| 3839 | } |
Anders Carlsson | 5cf86ba | 2010-04-24 19:06:50 +0000 | [diff] [blame] | 3840 | CXXBasePaths Paths(/*FindAmbiguities=*/true, /*RecordPaths=*/true, |
Douglas Gregor | a8f32e0 | 2009-10-06 17:59:45 +0000 | [diff] [blame] | 3841 | /*DetectVirtual=*/false); |
Mike Stump | 390b4cc | 2009-05-16 07:39:55 +0000 | [diff] [blame] | 3842 | // FIXME: Would it be useful to print full ambiguity paths, or is that |
| 3843 | // overkill? |
Richard Trieu | dd22509 | 2011-09-15 21:56:47 +0000 | [diff] [blame] | 3844 | if (!IsDerivedFrom(LHSType, Class, Paths) || |
Sebastian Redl | 7c8bd60 | 2009-02-07 20:10:22 +0000 | [diff] [blame] | 3845 | Paths.isAmbiguous(Context.getCanonicalType(Class))) { |
| 3846 | Diag(Loc, diag::err_bad_memptr_lhs) << OpSpelling |
Richard Trieu | dd22509 | 2011-09-15 21:56:47 +0000 | [diff] [blame] | 3847 | << (int)isIndirect << LHS.get()->getType(); |
Sebastian Redl | 7c8bd60 | 2009-02-07 20:10:22 +0000 | [diff] [blame] | 3848 | return QualType(); |
| 3849 | } |
Eli Friedman | 3005efe | 2010-01-16 00:00:48 +0000 | [diff] [blame] | 3850 | // Cast LHS to type of use. |
| 3851 | QualType UseType = isIndirect ? Context.getPointerType(Class) : Class; |
Eli Friedman | c1c0dfb | 2011-09-27 21:58:52 +0000 | [diff] [blame] | 3852 | ExprValueKind VK = isIndirect ? VK_RValue : LHS.get()->getValueKind(); |
Sebastian Redl | 906082e | 2010-07-20 04:20:21 +0000 | [diff] [blame] | 3853 | |
John McCall | f871d0c | 2010-08-07 06:22:56 +0000 | [diff] [blame] | 3854 | CXXCastPath BasePath; |
Anders Carlsson | 5cf86ba | 2010-04-24 19:06:50 +0000 | [diff] [blame] | 3855 | BuildBasePathArray(Paths, BasePath); |
Richard Trieu | dd22509 | 2011-09-15 21:56:47 +0000 | [diff] [blame] | 3856 | LHS = ImpCastExprToType(LHS.take(), UseType, CK_DerivedToBase, VK, |
| 3857 | &BasePath); |
Sebastian Redl | 7c8bd60 | 2009-02-07 20:10:22 +0000 | [diff] [blame] | 3858 | } |
| 3859 | |
Richard Trieu | dd22509 | 2011-09-15 21:56:47 +0000 | [diff] [blame] | 3860 | if (isa<CXXScalarValueInitExpr>(RHS.get()->IgnoreParens())) { |
Fariborz Jahanian | 05ebda9 | 2009-11-18 21:54:48 +0000 | [diff] [blame] | 3861 | // Diagnose use of pointer-to-member type which when used as |
| 3862 | // the functional cast in a pointer-to-member expression. |
| 3863 | Diag(Loc, diag::err_pointer_to_member_type) << isIndirect; |
| 3864 | return QualType(); |
| 3865 | } |
John McCall | f89e55a | 2010-11-18 06:31:45 +0000 | [diff] [blame] | 3866 | |
Sebastian Redl | 7c8bd60 | 2009-02-07 20:10:22 +0000 | [diff] [blame] | 3867 | // C++ 5.5p2 |
| 3868 | // The result is an object or a function of the type specified by the |
| 3869 | // second operand. |
| 3870 | // The cv qualifiers are the union of those in the pointer and the left side, |
| 3871 | // in accordance with 5.5p5 and 5.2.5. |
Sebastian Redl | 7c8bd60 | 2009-02-07 20:10:22 +0000 | [diff] [blame] | 3872 | QualType Result = MemPtr->getPointeeType(); |
Richard Trieu | dd22509 | 2011-09-15 21:56:47 +0000 | [diff] [blame] | 3873 | Result = Context.getCVRQualifiedType(Result, LHSType.getCVRQualifiers()); |
John McCall | f89e55a | 2010-11-18 06:31:45 +0000 | [diff] [blame] | 3874 | |
Douglas Gregor | 6b4df91 | 2011-01-26 16:40:18 +0000 | [diff] [blame] | 3875 | // C++0x [expr.mptr.oper]p6: |
| 3876 | // In a .* expression whose object expression is an rvalue, the program is |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3877 | // ill-formed if the second operand is a pointer to member function with |
| 3878 | // ref-qualifier &. In a ->* expression or in a .* expression whose object |
| 3879 | // expression is an lvalue, the program is ill-formed if the second operand |
Douglas Gregor | 6b4df91 | 2011-01-26 16:40:18 +0000 | [diff] [blame] | 3880 | // is a pointer to member function with ref-qualifier &&. |
| 3881 | if (const FunctionProtoType *Proto = Result->getAs<FunctionProtoType>()) { |
| 3882 | switch (Proto->getRefQualifier()) { |
| 3883 | case RQ_None: |
| 3884 | // Do nothing |
| 3885 | break; |
| 3886 | |
| 3887 | case RQ_LValue: |
Richard Trieu | dd22509 | 2011-09-15 21:56:47 +0000 | [diff] [blame] | 3888 | if (!isIndirect && !LHS.get()->Classify(Context).isLValue()) |
Douglas Gregor | 6b4df91 | 2011-01-26 16:40:18 +0000 | [diff] [blame] | 3889 | Diag(Loc, diag::err_pointer_to_member_oper_value_classify) |
Richard Trieu | dd22509 | 2011-09-15 21:56:47 +0000 | [diff] [blame] | 3890 | << RHSType << 1 << LHS.get()->getSourceRange(); |
Douglas Gregor | 6b4df91 | 2011-01-26 16:40:18 +0000 | [diff] [blame] | 3891 | break; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3892 | |
Douglas Gregor | 6b4df91 | 2011-01-26 16:40:18 +0000 | [diff] [blame] | 3893 | case RQ_RValue: |
Richard Trieu | dd22509 | 2011-09-15 21:56:47 +0000 | [diff] [blame] | 3894 | if (isIndirect || !LHS.get()->Classify(Context).isRValue()) |
Douglas Gregor | 6b4df91 | 2011-01-26 16:40:18 +0000 | [diff] [blame] | 3895 | Diag(Loc, diag::err_pointer_to_member_oper_value_classify) |
Richard Trieu | dd22509 | 2011-09-15 21:56:47 +0000 | [diff] [blame] | 3896 | << RHSType << 0 << LHS.get()->getSourceRange(); |
Douglas Gregor | 6b4df91 | 2011-01-26 16:40:18 +0000 | [diff] [blame] | 3897 | break; |
| 3898 | } |
| 3899 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3900 | |
John McCall | f89e55a | 2010-11-18 06:31:45 +0000 | [diff] [blame] | 3901 | // C++ [expr.mptr.oper]p6: |
| 3902 | // The result of a .* expression whose second operand is a pointer |
| 3903 | // to a data member is of the same value category as its |
| 3904 | // first operand. The result of a .* expression whose second |
| 3905 | // operand is a pointer to a member function is a prvalue. The |
| 3906 | // result of an ->* expression is an lvalue if its second operand |
| 3907 | // is a pointer to data member and a prvalue otherwise. |
John McCall | 864c041 | 2011-04-26 20:42:42 +0000 | [diff] [blame] | 3908 | if (Result->isFunctionType()) { |
John McCall | f89e55a | 2010-11-18 06:31:45 +0000 | [diff] [blame] | 3909 | VK = VK_RValue; |
John McCall | 864c041 | 2011-04-26 20:42:42 +0000 | [diff] [blame] | 3910 | return Context.BoundMemberTy; |
| 3911 | } else if (isIndirect) { |
John McCall | f89e55a | 2010-11-18 06:31:45 +0000 | [diff] [blame] | 3912 | VK = VK_LValue; |
John McCall | 864c041 | 2011-04-26 20:42:42 +0000 | [diff] [blame] | 3913 | } else { |
Richard Trieu | dd22509 | 2011-09-15 21:56:47 +0000 | [diff] [blame] | 3914 | VK = LHS.get()->getValueKind(); |
John McCall | 864c041 | 2011-04-26 20:42:42 +0000 | [diff] [blame] | 3915 | } |
John McCall | f89e55a | 2010-11-18 06:31:45 +0000 | [diff] [blame] | 3916 | |
Sebastian Redl | 7c8bd60 | 2009-02-07 20:10:22 +0000 | [diff] [blame] | 3917 | return Result; |
| 3918 | } |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 3919 | |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 3920 | /// \brief Try to convert a type to another according to C++0x 5.16p3. |
| 3921 | /// |
| 3922 | /// This is part of the parameter validation for the ? operator. If either |
| 3923 | /// value operand is a class type, the two operands are attempted to be |
| 3924 | /// converted to each other. This function does the conversion in one direction. |
Douglas Gregor | b70cf44 | 2010-03-26 20:14:36 +0000 | [diff] [blame] | 3925 | /// It returns true if the program is ill-formed and has already been diagnosed |
| 3926 | /// as such. |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 3927 | static bool TryClassUnification(Sema &Self, Expr *From, Expr *To, |
| 3928 | SourceLocation QuestionLoc, |
Douglas Gregor | b70cf44 | 2010-03-26 20:14:36 +0000 | [diff] [blame] | 3929 | bool &HaveConversion, |
| 3930 | QualType &ToType) { |
| 3931 | HaveConversion = false; |
| 3932 | ToType = To->getType(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3933 | |
| 3934 | InitializationKind Kind = InitializationKind::CreateCopy(To->getLocStart(), |
Douglas Gregor | b70cf44 | 2010-03-26 20:14:36 +0000 | [diff] [blame] | 3935 | SourceLocation()); |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 3936 | // C++0x 5.16p3 |
| 3937 | // The process for determining whether an operand expression E1 of type T1 |
| 3938 | // can be converted to match an operand expression E2 of type T2 is defined |
| 3939 | // as follows: |
| 3940 | // -- If E2 is an lvalue: |
John McCall | 7eb0a9e | 2010-11-24 05:12:34 +0000 | [diff] [blame] | 3941 | bool ToIsLvalue = To->isLValue(); |
Douglas Gregor | 0fd8ff7 | 2010-03-26 20:59:55 +0000 | [diff] [blame] | 3942 | if (ToIsLvalue) { |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 3943 | // E1 can be converted to match E2 if E1 can be implicitly converted to |
| 3944 | // type "lvalue reference to T2", subject to the constraint that in the |
| 3945 | // conversion the reference must bind directly to E1. |
Douglas Gregor | b70cf44 | 2010-03-26 20:14:36 +0000 | [diff] [blame] | 3946 | QualType T = Self.Context.getLValueReferenceType(ToType); |
| 3947 | InitializedEntity Entity = InitializedEntity::InitializeTemporary(T); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3948 | |
Douglas Gregor | b70cf44 | 2010-03-26 20:14:36 +0000 | [diff] [blame] | 3949 | InitializationSequence InitSeq(Self, Entity, Kind, &From, 1); |
| 3950 | if (InitSeq.isDirectReferenceBinding()) { |
| 3951 | ToType = T; |
| 3952 | HaveConversion = true; |
| 3953 | return false; |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 3954 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3955 | |
Douglas Gregor | b70cf44 | 2010-03-26 20:14:36 +0000 | [diff] [blame] | 3956 | if (InitSeq.isAmbiguous()) |
| 3957 | return InitSeq.Diagnose(Self, Entity, Kind, &From, 1); |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 3958 | } |
John McCall | b1bdc62 | 2010-02-25 01:37:24 +0000 | [diff] [blame] | 3959 | |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 3960 | // -- If E2 is an rvalue, or if the conversion above cannot be done: |
| 3961 | // -- if E1 and E2 have class type, and the underlying class types are |
| 3962 | // the same or one is a base class of the other: |
| 3963 | QualType FTy = From->getType(); |
| 3964 | QualType TTy = To->getType(); |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 3965 | const RecordType *FRec = FTy->getAs<RecordType>(); |
| 3966 | const RecordType *TRec = TTy->getAs<RecordType>(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3967 | bool FDerivedFromT = FRec && TRec && FRec != TRec && |
Douglas Gregor | b70cf44 | 2010-03-26 20:14:36 +0000 | [diff] [blame] | 3968 | Self.IsDerivedFrom(FTy, TTy); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3969 | if (FRec && TRec && |
Douglas Gregor | b70cf44 | 2010-03-26 20:14:36 +0000 | [diff] [blame] | 3970 | (FRec == TRec || FDerivedFromT || Self.IsDerivedFrom(TTy, FTy))) { |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 3971 | // E1 can be converted to match E2 if the class of T2 is the |
| 3972 | // same type as, or a base class of, the class of T1, and |
| 3973 | // [cv2 > cv1]. |
John McCall | b1bdc62 | 2010-02-25 01:37:24 +0000 | [diff] [blame] | 3974 | if (FRec == TRec || FDerivedFromT) { |
| 3975 | if (TTy.isAtLeastAsQualifiedAs(FTy)) { |
Douglas Gregor | b70cf44 | 2010-03-26 20:14:36 +0000 | [diff] [blame] | 3976 | InitializedEntity Entity = InitializedEntity::InitializeTemporary(TTy); |
| 3977 | InitializationSequence InitSeq(Self, Entity, Kind, &From, 1); |
Sebastian Redl | 383616c | 2011-06-05 12:23:28 +0000 | [diff] [blame] | 3978 | if (InitSeq) { |
Douglas Gregor | b70cf44 | 2010-03-26 20:14:36 +0000 | [diff] [blame] | 3979 | HaveConversion = true; |
| 3980 | return false; |
| 3981 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3982 | |
Douglas Gregor | b70cf44 | 2010-03-26 20:14:36 +0000 | [diff] [blame] | 3983 | if (InitSeq.isAmbiguous()) |
| 3984 | return InitSeq.Diagnose(Self, Entity, Kind, &From, 1); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3985 | } |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 3986 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3987 | |
Douglas Gregor | b70cf44 | 2010-03-26 20:14:36 +0000 | [diff] [blame] | 3988 | return false; |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 3989 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3990 | |
Douglas Gregor | b70cf44 | 2010-03-26 20:14:36 +0000 | [diff] [blame] | 3991 | // -- Otherwise: E1 can be converted to match E2 if E1 can be |
| 3992 | // implicitly converted to the type that expression E2 would have |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 3993 | // if E2 were converted to an rvalue (or the type it has, if E2 is |
Douglas Gregor | 0fd8ff7 | 2010-03-26 20:59:55 +0000 | [diff] [blame] | 3994 | // an rvalue). |
| 3995 | // |
| 3996 | // This actually refers very narrowly to the lvalue-to-rvalue conversion, not |
| 3997 | // to the array-to-pointer or function-to-pointer conversions. |
| 3998 | if (!TTy->getAs<TagType>()) |
| 3999 | TTy = TTy.getUnqualifiedType(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4000 | |
Douglas Gregor | b70cf44 | 2010-03-26 20:14:36 +0000 | [diff] [blame] | 4001 | InitializedEntity Entity = InitializedEntity::InitializeTemporary(TTy); |
| 4002 | InitializationSequence InitSeq(Self, Entity, Kind, &From, 1); |
Sebastian Redl | 383616c | 2011-06-05 12:23:28 +0000 | [diff] [blame] | 4003 | HaveConversion = !InitSeq.Failed(); |
Douglas Gregor | b70cf44 | 2010-03-26 20:14:36 +0000 | [diff] [blame] | 4004 | ToType = TTy; |
| 4005 | if (InitSeq.isAmbiguous()) |
| 4006 | return InitSeq.Diagnose(Self, Entity, Kind, &From, 1); |
| 4007 | |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4008 | return false; |
| 4009 | } |
| 4010 | |
| 4011 | /// \brief Try to find a common type for two according to C++0x 5.16p5. |
| 4012 | /// |
| 4013 | /// This is part of the parameter validation for the ? operator. If either |
| 4014 | /// value operand is a class type, overload resolution is used to find a |
| 4015 | /// conversion to a common type. |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4016 | static bool FindConditionalOverload(Sema &Self, ExprResult &LHS, ExprResult &RHS, |
Chandler Carruth | 82214a8 | 2011-02-18 23:54:50 +0000 | [diff] [blame] | 4017 | SourceLocation QuestionLoc) { |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4018 | Expr *Args[2] = { LHS.get(), RHS.get() }; |
Chandler Carruth | 82214a8 | 2011-02-18 23:54:50 +0000 | [diff] [blame] | 4019 | OverloadCandidateSet CandidateSet(QuestionLoc); |
| 4020 | Self.AddBuiltinOperatorCandidates(OO_Conditional, QuestionLoc, Args, 2, |
| 4021 | CandidateSet); |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4022 | |
| 4023 | OverloadCandidateSet::iterator Best; |
Chandler Carruth | 82214a8 | 2011-02-18 23:54:50 +0000 | [diff] [blame] | 4024 | switch (CandidateSet.BestViableFunction(Self, QuestionLoc, Best)) { |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4025 | case OR_Success: { |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4026 | // We found a match. Perform the conversions on the arguments and move on. |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4027 | ExprResult LHSRes = |
| 4028 | Self.PerformImplicitConversion(LHS.get(), Best->BuiltinTypes.ParamTypes[0], |
| 4029 | Best->Conversions[0], Sema::AA_Converting); |
| 4030 | if (LHSRes.isInvalid()) |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4031 | break; |
Benjamin Kramer | 3fe198b | 2012-08-23 21:35:17 +0000 | [diff] [blame] | 4032 | LHS = LHSRes; |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4033 | |
| 4034 | ExprResult RHSRes = |
| 4035 | Self.PerformImplicitConversion(RHS.get(), Best->BuiltinTypes.ParamTypes[1], |
| 4036 | Best->Conversions[1], Sema::AA_Converting); |
| 4037 | if (RHSRes.isInvalid()) |
| 4038 | break; |
Benjamin Kramer | 3fe198b | 2012-08-23 21:35:17 +0000 | [diff] [blame] | 4039 | RHS = RHSRes; |
Chandler Carruth | 25ca421 | 2011-02-25 19:41:05 +0000 | [diff] [blame] | 4040 | if (Best->Function) |
Eli Friedman | 5f2987c | 2012-02-02 03:46:19 +0000 | [diff] [blame] | 4041 | Self.MarkFunctionReferenced(QuestionLoc, Best->Function); |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4042 | return false; |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4043 | } |
| 4044 | |
Douglas Gregor | 20093b4 | 2009-12-09 23:02:17 +0000 | [diff] [blame] | 4045 | case OR_No_Viable_Function: |
Chandler Carruth | 82214a8 | 2011-02-18 23:54:50 +0000 | [diff] [blame] | 4046 | |
| 4047 | // Emit a better diagnostic if one of the expressions is a null pointer |
| 4048 | // constant and the other is a pointer type. In this case, the user most |
| 4049 | // likely forgot to take the address of the other expression. |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4050 | if (Self.DiagnoseConditionalForNull(LHS.get(), RHS.get(), QuestionLoc)) |
Chandler Carruth | 82214a8 | 2011-02-18 23:54:50 +0000 | [diff] [blame] | 4051 | return true; |
| 4052 | |
| 4053 | Self.Diag(QuestionLoc, diag::err_typecheck_cond_incompatible_operands) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4054 | << LHS.get()->getType() << RHS.get()->getType() |
| 4055 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4056 | return true; |
| 4057 | |
Douglas Gregor | 20093b4 | 2009-12-09 23:02:17 +0000 | [diff] [blame] | 4058 | case OR_Ambiguous: |
Chandler Carruth | 82214a8 | 2011-02-18 23:54:50 +0000 | [diff] [blame] | 4059 | Self.Diag(QuestionLoc, diag::err_conditional_ambiguous_ovl) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4060 | << LHS.get()->getType() << RHS.get()->getType() |
| 4061 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); |
Mike Stump | 390b4cc | 2009-05-16 07:39:55 +0000 | [diff] [blame] | 4062 | // FIXME: Print the possible common types by printing the return types of |
| 4063 | // the viable candidates. |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4064 | break; |
| 4065 | |
Douglas Gregor | 20093b4 | 2009-12-09 23:02:17 +0000 | [diff] [blame] | 4066 | case OR_Deleted: |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 4067 | llvm_unreachable("Conditional operator has only built-in overloads"); |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4068 | } |
| 4069 | return true; |
| 4070 | } |
| 4071 | |
Sebastian Redl | 7645850 | 2009-04-17 16:30:52 +0000 | [diff] [blame] | 4072 | /// \brief Perform an "extended" implicit conversion as returned by |
| 4073 | /// TryClassUnification. |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4074 | static bool ConvertForConditional(Sema &Self, ExprResult &E, QualType T) { |
Douglas Gregor | b70cf44 | 2010-03-26 20:14:36 +0000 | [diff] [blame] | 4075 | InitializedEntity Entity = InitializedEntity::InitializeTemporary(T); |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4076 | InitializationKind Kind = InitializationKind::CreateCopy(E.get()->getLocStart(), |
Douglas Gregor | b70cf44 | 2010-03-26 20:14:36 +0000 | [diff] [blame] | 4077 | SourceLocation()); |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4078 | Expr *Arg = E.take(); |
| 4079 | InitializationSequence InitSeq(Self, Entity, Kind, &Arg, 1); |
Benjamin Kramer | 5354e77 | 2012-08-23 23:38:35 +0000 | [diff] [blame] | 4080 | ExprResult Result = InitSeq.Perform(Self, Entity, Kind, Arg); |
Douglas Gregor | b70cf44 | 2010-03-26 20:14:36 +0000 | [diff] [blame] | 4081 | if (Result.isInvalid()) |
Sebastian Redl | 7645850 | 2009-04-17 16:30:52 +0000 | [diff] [blame] | 4082 | return true; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4083 | |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4084 | E = Result; |
Sebastian Redl | 7645850 | 2009-04-17 16:30:52 +0000 | [diff] [blame] | 4085 | return false; |
| 4086 | } |
| 4087 | |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4088 | /// \brief Check the operands of ?: under C++ semantics. |
| 4089 | /// |
| 4090 | /// See C++ [expr.cond]. Note that LHS is never null, even for the GNU x ?: y |
| 4091 | /// extension. In this case, LHS == Cond. (But they're not aliases.) |
Richard Smith | 50d61c8 | 2012-08-08 06:13:49 +0000 | [diff] [blame] | 4092 | QualType Sema::CXXCheckConditionalOperands(ExprResult &Cond, ExprResult &LHS, |
| 4093 | ExprResult &RHS, ExprValueKind &VK, |
| 4094 | ExprObjectKind &OK, |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4095 | SourceLocation QuestionLoc) { |
Mike Stump | 390b4cc | 2009-05-16 07:39:55 +0000 | [diff] [blame] | 4096 | // FIXME: Handle C99's complex types, vector types, block pointers and Obj-C++ |
| 4097 | // interface pointers. |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4098 | |
Richard Smith | 604fb38 | 2012-08-07 22:06:48 +0000 | [diff] [blame] | 4099 | // C++11 [expr.cond]p1 |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4100 | // The first expression is contextually converted to bool. |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4101 | if (!Cond.get()->isTypeDependent()) { |
| 4102 | ExprResult CondRes = CheckCXXBooleanCondition(Cond.take()); |
| 4103 | if (CondRes.isInvalid()) |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4104 | return QualType(); |
Benjamin Kramer | 3fe198b | 2012-08-23 21:35:17 +0000 | [diff] [blame] | 4105 | Cond = CondRes; |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4106 | } |
| 4107 | |
John McCall | f89e55a | 2010-11-18 06:31:45 +0000 | [diff] [blame] | 4108 | // Assume r-value. |
| 4109 | VK = VK_RValue; |
John McCall | 0943168 | 2010-11-18 19:01:18 +0000 | [diff] [blame] | 4110 | OK = OK_Ordinary; |
John McCall | f89e55a | 2010-11-18 06:31:45 +0000 | [diff] [blame] | 4111 | |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4112 | // Either of the arguments dependent? |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4113 | if (LHS.get()->isTypeDependent() || RHS.get()->isTypeDependent()) |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4114 | return Context.DependentTy; |
| 4115 | |
Richard Smith | 604fb38 | 2012-08-07 22:06:48 +0000 | [diff] [blame] | 4116 | // C++11 [expr.cond]p2 |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4117 | // If either the second or the third operand has type (cv) void, ... |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4118 | QualType LTy = LHS.get()->getType(); |
| 4119 | QualType RTy = RHS.get()->getType(); |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4120 | bool LVoid = LTy->isVoidType(); |
| 4121 | bool RVoid = RTy->isVoidType(); |
| 4122 | if (LVoid || RVoid) { |
| 4123 | // ... then the [l2r] conversions are performed on the second and third |
| 4124 | // operands ... |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4125 | LHS = DefaultFunctionArrayLvalueConversion(LHS.take()); |
| 4126 | RHS = DefaultFunctionArrayLvalueConversion(RHS.take()); |
| 4127 | if (LHS.isInvalid() || RHS.isInvalid()) |
| 4128 | return QualType(); |
Richard Smith | 604fb38 | 2012-08-07 22:06:48 +0000 | [diff] [blame] | 4129 | |
| 4130 | // Finish off the lvalue-to-rvalue conversion by copy-initializing a |
| 4131 | // temporary if necessary. DefaultFunctionArrayLvalueConversion doesn't |
| 4132 | // do this part for us. |
| 4133 | ExprResult &NonVoid = LVoid ? RHS : LHS; |
| 4134 | if (NonVoid.get()->getType()->isRecordType() && |
| 4135 | NonVoid.get()->isGLValue()) { |
David Blaikie | 654f1d5 | 2012-09-10 22:05:41 +0000 | [diff] [blame] | 4136 | if (RequireNonAbstractType(QuestionLoc, NonVoid.get()->getType(), |
| 4137 | diag::err_allocation_of_abstract_type)) |
| 4138 | return QualType(); |
Richard Smith | 604fb38 | 2012-08-07 22:06:48 +0000 | [diff] [blame] | 4139 | InitializedEntity Entity = |
| 4140 | InitializedEntity::InitializeTemporary(NonVoid.get()->getType()); |
| 4141 | NonVoid = PerformCopyInitialization(Entity, SourceLocation(), NonVoid); |
| 4142 | if (NonVoid.isInvalid()) |
| 4143 | return QualType(); |
| 4144 | } |
| 4145 | |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4146 | LTy = LHS.get()->getType(); |
| 4147 | RTy = RHS.get()->getType(); |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4148 | |
| 4149 | // ... and one of the following shall hold: |
| 4150 | // -- The second or the third operand (but not both) is a throw- |
Richard Smith | 604fb38 | 2012-08-07 22:06:48 +0000 | [diff] [blame] | 4151 | // expression; the result is of the type of the other and is a prvalue. |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4152 | bool LThrow = isa<CXXThrowExpr>(LHS.get()); |
| 4153 | bool RThrow = isa<CXXThrowExpr>(RHS.get()); |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4154 | if (LThrow && !RThrow) |
| 4155 | return RTy; |
| 4156 | if (RThrow && !LThrow) |
| 4157 | return LTy; |
| 4158 | |
| 4159 | // -- Both the second and third operands have type void; the result is of |
Richard Smith | 604fb38 | 2012-08-07 22:06:48 +0000 | [diff] [blame] | 4160 | // type void and is a prvalue. |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4161 | if (LVoid && RVoid) |
| 4162 | return Context.VoidTy; |
| 4163 | |
| 4164 | // Neither holds, error. |
| 4165 | Diag(QuestionLoc, diag::err_conditional_void_nonvoid) |
| 4166 | << (LVoid ? RTy : LTy) << (LVoid ? 0 : 1) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4167 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4168 | return QualType(); |
| 4169 | } |
| 4170 | |
| 4171 | // Neither is void. |
| 4172 | |
Richard Smith | 50d61c8 | 2012-08-08 06:13:49 +0000 | [diff] [blame] | 4173 | // C++11 [expr.cond]p3 |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4174 | // Otherwise, if the second and third operand have different types, and |
Richard Smith | 50d61c8 | 2012-08-08 06:13:49 +0000 | [diff] [blame] | 4175 | // either has (cv) class type [...] an attempt is made to convert each of |
| 4176 | // those operands to the type of the other. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4177 | if (!Context.hasSameType(LTy, RTy) && |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4178 | (LTy->isRecordType() || RTy->isRecordType())) { |
| 4179 | ImplicitConversionSequence ICSLeftToRight, ICSRightToLeft; |
| 4180 | // These return true if a single direction is already ambiguous. |
Douglas Gregor | b70cf44 | 2010-03-26 20:14:36 +0000 | [diff] [blame] | 4181 | QualType L2RType, R2LType; |
| 4182 | bool HaveL2R, HaveR2L; |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4183 | if (TryClassUnification(*this, LHS.get(), RHS.get(), QuestionLoc, HaveL2R, L2RType)) |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4184 | return QualType(); |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4185 | if (TryClassUnification(*this, RHS.get(), LHS.get(), QuestionLoc, HaveR2L, R2LType)) |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4186 | return QualType(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4187 | |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4188 | // If both can be converted, [...] the program is ill-formed. |
| 4189 | if (HaveL2R && HaveR2L) { |
| 4190 | Diag(QuestionLoc, diag::err_conditional_ambiguous) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4191 | << LTy << RTy << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4192 | return QualType(); |
| 4193 | } |
| 4194 | |
| 4195 | // If exactly one conversion is possible, that conversion is applied to |
| 4196 | // the chosen operand and the converted operands are used in place of the |
| 4197 | // original operands for the remainder of this section. |
| 4198 | if (HaveL2R) { |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4199 | if (ConvertForConditional(*this, LHS, L2RType) || LHS.isInvalid()) |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4200 | return QualType(); |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4201 | LTy = LHS.get()->getType(); |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4202 | } else if (HaveR2L) { |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4203 | if (ConvertForConditional(*this, RHS, R2LType) || RHS.isInvalid()) |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4204 | return QualType(); |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4205 | RTy = RHS.get()->getType(); |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4206 | } |
| 4207 | } |
| 4208 | |
Richard Smith | 50d61c8 | 2012-08-08 06:13:49 +0000 | [diff] [blame] | 4209 | // C++11 [expr.cond]p3 |
| 4210 | // if both are glvalues of the same value category and the same type except |
| 4211 | // for cv-qualification, an attempt is made to convert each of those |
| 4212 | // operands to the type of the other. |
| 4213 | ExprValueKind LVK = LHS.get()->getValueKind(); |
| 4214 | ExprValueKind RVK = RHS.get()->getValueKind(); |
| 4215 | if (!Context.hasSameType(LTy, RTy) && |
| 4216 | Context.hasSameUnqualifiedType(LTy, RTy) && |
| 4217 | LVK == RVK && LVK != VK_RValue) { |
| 4218 | // Since the unqualified types are reference-related and we require the |
| 4219 | // result to be as if a reference bound directly, the only conversion |
| 4220 | // we can perform is to add cv-qualifiers. |
| 4221 | Qualifiers LCVR = Qualifiers::fromCVRMask(LTy.getCVRQualifiers()); |
| 4222 | Qualifiers RCVR = Qualifiers::fromCVRMask(RTy.getCVRQualifiers()); |
| 4223 | if (RCVR.isStrictSupersetOf(LCVR)) { |
| 4224 | LHS = ImpCastExprToType(LHS.take(), RTy, CK_NoOp, LVK); |
| 4225 | LTy = LHS.get()->getType(); |
| 4226 | } |
| 4227 | else if (LCVR.isStrictSupersetOf(RCVR)) { |
| 4228 | RHS = ImpCastExprToType(RHS.take(), LTy, CK_NoOp, RVK); |
| 4229 | RTy = RHS.get()->getType(); |
| 4230 | } |
| 4231 | } |
| 4232 | |
| 4233 | // C++11 [expr.cond]p4 |
John McCall | f89e55a | 2010-11-18 06:31:45 +0000 | [diff] [blame] | 4234 | // If the second and third operands are glvalues of the same value |
| 4235 | // category and have the same type, the result is of that type and |
| 4236 | // value category and it is a bit-field if the second or the third |
| 4237 | // operand is a bit-field, or if both are bit-fields. |
John McCall | 0943168 | 2010-11-18 19:01:18 +0000 | [diff] [blame] | 4238 | // We only extend this to bitfields, not to the crazy other kinds of |
| 4239 | // l-values. |
Douglas Gregor | 1927b1f | 2010-04-01 22:47:07 +0000 | [diff] [blame] | 4240 | bool Same = Context.hasSameType(LTy, RTy); |
Richard Smith | 50d61c8 | 2012-08-08 06:13:49 +0000 | [diff] [blame] | 4241 | if (Same && LVK == RVK && LVK != VK_RValue && |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4242 | LHS.get()->isOrdinaryOrBitFieldObject() && |
| 4243 | RHS.get()->isOrdinaryOrBitFieldObject()) { |
| 4244 | VK = LHS.get()->getValueKind(); |
| 4245 | if (LHS.get()->getObjectKind() == OK_BitField || |
| 4246 | RHS.get()->getObjectKind() == OK_BitField) |
John McCall | 0943168 | 2010-11-18 19:01:18 +0000 | [diff] [blame] | 4247 | OK = OK_BitField; |
John McCall | f89e55a | 2010-11-18 06:31:45 +0000 | [diff] [blame] | 4248 | return LTy; |
Fariborz Jahanian | 3911a1a | 2010-09-25 01:08:05 +0000 | [diff] [blame] | 4249 | } |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4250 | |
Richard Smith | 50d61c8 | 2012-08-08 06:13:49 +0000 | [diff] [blame] | 4251 | // C++11 [expr.cond]p5 |
| 4252 | // Otherwise, the result is a prvalue. If the second and third operands |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4253 | // do not have the same type, and either has (cv) class type, ... |
| 4254 | if (!Same && (LTy->isRecordType() || RTy->isRecordType())) { |
| 4255 | // ... overload resolution is used to determine the conversions (if any) |
| 4256 | // to be applied to the operands. If the overload resolution fails, the |
| 4257 | // program is ill-formed. |
| 4258 | if (FindConditionalOverload(*this, LHS, RHS, QuestionLoc)) |
| 4259 | return QualType(); |
| 4260 | } |
| 4261 | |
Richard Smith | 50d61c8 | 2012-08-08 06:13:49 +0000 | [diff] [blame] | 4262 | // C++11 [expr.cond]p6 |
| 4263 | // Lvalue-to-rvalue, array-to-pointer, and function-to-pointer standard |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4264 | // conversions are performed on the second and third operands. |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4265 | LHS = DefaultFunctionArrayLvalueConversion(LHS.take()); |
| 4266 | RHS = DefaultFunctionArrayLvalueConversion(RHS.take()); |
| 4267 | if (LHS.isInvalid() || RHS.isInvalid()) |
| 4268 | return QualType(); |
| 4269 | LTy = LHS.get()->getType(); |
| 4270 | RTy = RHS.get()->getType(); |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4271 | |
| 4272 | // After those conversions, one of the following shall hold: |
| 4273 | // -- The second and third operands have the same type; the result |
Douglas Gregor | b65a458 | 2010-05-19 23:40:50 +0000 | [diff] [blame] | 4274 | // is of that type. If the operands have class type, the result |
| 4275 | // is a prvalue temporary of the result type, which is |
| 4276 | // copy-initialized from either the second operand or the third |
| 4277 | // operand depending on the value of the first operand. |
| 4278 | if (Context.getCanonicalType(LTy) == Context.getCanonicalType(RTy)) { |
| 4279 | if (LTy->isRecordType()) { |
| 4280 | // The operands have class type. Make a temporary copy. |
David Blaikie | 654f1d5 | 2012-09-10 22:05:41 +0000 | [diff] [blame] | 4281 | if (RequireNonAbstractType(QuestionLoc, LTy, |
| 4282 | diag::err_allocation_of_abstract_type)) |
| 4283 | return QualType(); |
Douglas Gregor | b65a458 | 2010-05-19 23:40:50 +0000 | [diff] [blame] | 4284 | InitializedEntity Entity = InitializedEntity::InitializeTemporary(LTy); |
David Blaikie | 654f1d5 | 2012-09-10 22:05:41 +0000 | [diff] [blame] | 4285 | |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4286 | ExprResult LHSCopy = PerformCopyInitialization(Entity, |
| 4287 | SourceLocation(), |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4288 | LHS); |
Douglas Gregor | b65a458 | 2010-05-19 23:40:50 +0000 | [diff] [blame] | 4289 | if (LHSCopy.isInvalid()) |
| 4290 | return QualType(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4291 | |
| 4292 | ExprResult RHSCopy = PerformCopyInitialization(Entity, |
| 4293 | SourceLocation(), |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4294 | RHS); |
Douglas Gregor | b65a458 | 2010-05-19 23:40:50 +0000 | [diff] [blame] | 4295 | if (RHSCopy.isInvalid()) |
| 4296 | return QualType(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4297 | |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4298 | LHS = LHSCopy; |
| 4299 | RHS = RHSCopy; |
Douglas Gregor | b65a458 | 2010-05-19 23:40:50 +0000 | [diff] [blame] | 4300 | } |
| 4301 | |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4302 | return LTy; |
Douglas Gregor | b65a458 | 2010-05-19 23:40:50 +0000 | [diff] [blame] | 4303 | } |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4304 | |
Douglas Gregor | fb4a543 | 2010-05-18 22:42:18 +0000 | [diff] [blame] | 4305 | // Extension: conditional operator involving vector types. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4306 | if (LTy->isVectorType() || RTy->isVectorType()) |
Eli Friedman | b9b4b78 | 2011-06-23 18:10:35 +0000 | [diff] [blame] | 4307 | return CheckVectorOperands(LHS, RHS, QuestionLoc, /*isCompAssign*/false); |
Douglas Gregor | fb4a543 | 2010-05-18 22:42:18 +0000 | [diff] [blame] | 4308 | |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4309 | // -- The second and third operands have arithmetic or enumeration type; |
| 4310 | // the usual arithmetic conversions are performed to bring them to a |
| 4311 | // common type, and the result is of that type. |
| 4312 | if (LTy->isArithmeticType() && RTy->isArithmeticType()) { |
| 4313 | UsualArithmeticConversions(LHS, RHS); |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4314 | if (LHS.isInvalid() || RHS.isInvalid()) |
| 4315 | return QualType(); |
| 4316 | return LHS.get()->getType(); |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4317 | } |
| 4318 | |
| 4319 | // -- The second and third operands have pointer type, or one has pointer |
Richard Smith | 50d61c8 | 2012-08-08 06:13:49 +0000 | [diff] [blame] | 4320 | // type and the other is a null pointer constant, or both are null |
| 4321 | // pointer constants, at least one of which is non-integral; pointer |
| 4322 | // conversions and qualification conversions are performed to bring them |
| 4323 | // to their composite pointer type. The result is of the composite |
| 4324 | // pointer type. |
Eli Friedman | de8ac49 | 2010-01-02 22:56:07 +0000 | [diff] [blame] | 4325 | // -- The second and third operands have pointer to member type, or one has |
| 4326 | // pointer to member type and the other is a null pointer constant; |
| 4327 | // pointer to member conversions and qualification conversions are |
| 4328 | // performed to bring them to a common type, whose cv-qualification |
| 4329 | // shall match the cv-qualification of either the second or the third |
| 4330 | // operand. The result is of the common type. |
Douglas Gregor | b2cb1cb | 2010-02-25 22:29:57 +0000 | [diff] [blame] | 4331 | bool NonStandardCompositeType = false; |
Douglas Gregor | 8f00dcf | 2010-04-16 23:20:25 +0000 | [diff] [blame] | 4332 | QualType Composite = FindCompositePointerType(QuestionLoc, LHS, RHS, |
Douglas Gregor | b2cb1cb | 2010-02-25 22:29:57 +0000 | [diff] [blame] | 4333 | isSFINAEContext()? 0 : &NonStandardCompositeType); |
| 4334 | if (!Composite.isNull()) { |
| 4335 | if (NonStandardCompositeType) |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4336 | Diag(QuestionLoc, |
Douglas Gregor | b2cb1cb | 2010-02-25 22:29:57 +0000 | [diff] [blame] | 4337 | diag::ext_typecheck_cond_incompatible_operands_nonstandard) |
| 4338 | << LTy << RTy << Composite |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4339 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4340 | |
Sebastian Redl | d1bd7fc | 2009-04-19 19:26:31 +0000 | [diff] [blame] | 4341 | return Composite; |
Douglas Gregor | b2cb1cb | 2010-02-25 22:29:57 +0000 | [diff] [blame] | 4342 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4343 | |
Douglas Gregor | 1927b1f | 2010-04-01 22:47:07 +0000 | [diff] [blame] | 4344 | // Similarly, attempt to find composite type of two objective-c pointers. |
Fariborz Jahanian | 5501636 | 2009-12-10 20:46:08 +0000 | [diff] [blame] | 4345 | Composite = FindCompositeObjCPointerType(LHS, RHS, QuestionLoc); |
| 4346 | if (!Composite.isNull()) |
| 4347 | return Composite; |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4348 | |
Chandler Carruth | 7ef9324 | 2011-02-19 00:13:59 +0000 | [diff] [blame] | 4349 | // Check if we are using a null with a non-pointer type. |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4350 | if (DiagnoseConditionalForNull(LHS.get(), RHS.get(), QuestionLoc)) |
Chandler Carruth | 7ef9324 | 2011-02-19 00:13:59 +0000 | [diff] [blame] | 4351 | return QualType(); |
| 4352 | |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4353 | Diag(QuestionLoc, diag::err_typecheck_cond_incompatible_operands) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4354 | << LHS.get()->getType() << RHS.get()->getType() |
| 4355 | << LHS.get()->getSourceRange() << RHS.get()->getSourceRange(); |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 4356 | return QualType(); |
| 4357 | } |
Sebastian Redl | d1bd7fc | 2009-04-19 19:26:31 +0000 | [diff] [blame] | 4358 | |
| 4359 | /// \brief Find a merged pointer type and convert the two expressions to it. |
| 4360 | /// |
Douglas Gregor | 20b3e99 | 2009-08-24 17:42:35 +0000 | [diff] [blame] | 4361 | /// This finds the composite pointer type (or member pointer type) for @p E1 |
Richard Smith | 50d61c8 | 2012-08-08 06:13:49 +0000 | [diff] [blame] | 4362 | /// and @p E2 according to C++11 5.9p2. It converts both expressions to this |
Douglas Gregor | 20b3e99 | 2009-08-24 17:42:35 +0000 | [diff] [blame] | 4363 | /// type and returns it. |
Sebastian Redl | d1bd7fc | 2009-04-19 19:26:31 +0000 | [diff] [blame] | 4364 | /// It does not emit diagnostics. |
Douglas Gregor | b2cb1cb | 2010-02-25 22:29:57 +0000 | [diff] [blame] | 4365 | /// |
Douglas Gregor | 8f00dcf | 2010-04-16 23:20:25 +0000 | [diff] [blame] | 4366 | /// \param Loc The location of the operator requiring these two expressions to |
| 4367 | /// be converted to the composite pointer type. |
| 4368 | /// |
Douglas Gregor | b2cb1cb | 2010-02-25 22:29:57 +0000 | [diff] [blame] | 4369 | /// If \p NonStandardCompositeType is non-NULL, then we are permitted to find |
| 4370 | /// a non-standard (but still sane) composite type to which both expressions |
| 4371 | /// can be converted. When such a type is chosen, \c *NonStandardCompositeType |
| 4372 | /// will be set true. |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4373 | QualType Sema::FindCompositePointerType(SourceLocation Loc, |
Douglas Gregor | 8f00dcf | 2010-04-16 23:20:25 +0000 | [diff] [blame] | 4374 | Expr *&E1, Expr *&E2, |
Douglas Gregor | b2cb1cb | 2010-02-25 22:29:57 +0000 | [diff] [blame] | 4375 | bool *NonStandardCompositeType) { |
| 4376 | if (NonStandardCompositeType) |
| 4377 | *NonStandardCompositeType = false; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4378 | |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 4379 | assert(getLangOpts().CPlusPlus && "This function assumes C++"); |
Sebastian Redl | d1bd7fc | 2009-04-19 19:26:31 +0000 | [diff] [blame] | 4380 | QualType T1 = E1->getType(), T2 = E2->getType(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4381 | |
Richard Smith | 50d61c8 | 2012-08-08 06:13:49 +0000 | [diff] [blame] | 4382 | // C++11 5.9p2 |
Sebastian Redl | d1bd7fc | 2009-04-19 19:26:31 +0000 | [diff] [blame] | 4383 | // Pointer conversions and qualification conversions are performed on |
| 4384 | // pointer operands to bring them to their composite pointer type. If |
| 4385 | // one operand is a null pointer constant, the composite pointer type is |
Richard Smith | 50d61c8 | 2012-08-08 06:13:49 +0000 | [diff] [blame] | 4386 | // std::nullptr_t if the other operand is also a null pointer constant or, |
| 4387 | // if the other operand is a pointer, the type of the other operand. |
| 4388 | if (!T1->isAnyPointerType() && !T1->isMemberPointerType() && |
| 4389 | !T2->isAnyPointerType() && !T2->isMemberPointerType()) { |
| 4390 | if (T1->isNullPtrType() && |
| 4391 | E2->isNullPointerConstant(Context, Expr::NPC_ValueDependentIsNull)) { |
| 4392 | E2 = ImpCastExprToType(E2, T1, CK_NullToPointer).take(); |
| 4393 | return T1; |
| 4394 | } |
| 4395 | if (T2->isNullPtrType() && |
| 4396 | E1->isNullPointerConstant(Context, Expr::NPC_ValueDependentIsNull)) { |
| 4397 | E1 = ImpCastExprToType(E1, T2, CK_NullToPointer).take(); |
| 4398 | return T2; |
| 4399 | } |
| 4400 | return QualType(); |
| 4401 | } |
| 4402 | |
Douglas Gregor | ce94049 | 2009-09-25 04:25:58 +0000 | [diff] [blame] | 4403 | if (E1->isNullPointerConstant(Context, Expr::NPC_ValueDependentIsNull)) { |
Eli Friedman | 73c39ab | 2009-10-20 08:27:19 +0000 | [diff] [blame] | 4404 | if (T2->isMemberPointerType()) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4405 | E1 = ImpCastExprToType(E1, T2, CK_NullToMemberPointer).take(); |
Eli Friedman | 73c39ab | 2009-10-20 08:27:19 +0000 | [diff] [blame] | 4406 | else |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4407 | E1 = ImpCastExprToType(E1, T2, CK_NullToPointer).take(); |
Sebastian Redl | d1bd7fc | 2009-04-19 19:26:31 +0000 | [diff] [blame] | 4408 | return T2; |
| 4409 | } |
Douglas Gregor | ce94049 | 2009-09-25 04:25:58 +0000 | [diff] [blame] | 4410 | if (E2->isNullPointerConstant(Context, Expr::NPC_ValueDependentIsNull)) { |
Eli Friedman | 73c39ab | 2009-10-20 08:27:19 +0000 | [diff] [blame] | 4411 | if (T1->isMemberPointerType()) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4412 | E2 = ImpCastExprToType(E2, T1, CK_NullToMemberPointer).take(); |
Eli Friedman | 73c39ab | 2009-10-20 08:27:19 +0000 | [diff] [blame] | 4413 | else |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 4414 | E2 = ImpCastExprToType(E2, T1, CK_NullToPointer).take(); |
Sebastian Redl | d1bd7fc | 2009-04-19 19:26:31 +0000 | [diff] [blame] | 4415 | return T1; |
| 4416 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4417 | |
Douglas Gregor | 20b3e99 | 2009-08-24 17:42:35 +0000 | [diff] [blame] | 4418 | // Now both have to be pointers or member pointers. |
Sebastian Redl | a439e6f | 2009-11-16 21:03:45 +0000 | [diff] [blame] | 4419 | if ((!T1->isPointerType() && !T1->isMemberPointerType()) || |
| 4420 | (!T2->isPointerType() && !T2->isMemberPointerType())) |
Sebastian Redl | d1bd7fc | 2009-04-19 19:26:31 +0000 | [diff] [blame] | 4421 | return QualType(); |
| 4422 | |
| 4423 | // Otherwise, of one of the operands has type "pointer to cv1 void," then |
| 4424 | // the other has type "pointer to cv2 T" and the composite pointer type is |
| 4425 | // "pointer to cv12 void," where cv12 is the union of cv1 and cv2. |
| 4426 | // Otherwise, the composite pointer type is a pointer type similar to the |
| 4427 | // type of one of the operands, with a cv-qualification signature that is |
| 4428 | // the union of the cv-qualification signatures of the operand types. |
| 4429 | // In practice, the first part here is redundant; it's subsumed by the second. |
| 4430 | // What we do here is, we build the two possible composite types, and try the |
| 4431 | // conversions in both directions. If only one works, or if the two composite |
| 4432 | // types are the same, we have succeeded. |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 4433 | // FIXME: extended qualifiers? |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 4434 | typedef SmallVector<unsigned, 4> QualifierVector; |
Sebastian Redl | a439e6f | 2009-11-16 21:03:45 +0000 | [diff] [blame] | 4435 | QualifierVector QualifierUnion; |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 4436 | typedef SmallVector<std::pair<const Type *, const Type *>, 4> |
Sebastian Redl | a439e6f | 2009-11-16 21:03:45 +0000 | [diff] [blame] | 4437 | ContainingClassVector; |
| 4438 | ContainingClassVector MemberOfClass; |
| 4439 | QualType Composite1 = Context.getCanonicalType(T1), |
| 4440 | Composite2 = Context.getCanonicalType(T2); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4441 | unsigned NeedConstBefore = 0; |
Douglas Gregor | 20b3e99 | 2009-08-24 17:42:35 +0000 | [diff] [blame] | 4442 | do { |
| 4443 | const PointerType *Ptr1, *Ptr2; |
| 4444 | if ((Ptr1 = Composite1->getAs<PointerType>()) && |
| 4445 | (Ptr2 = Composite2->getAs<PointerType>())) { |
| 4446 | Composite1 = Ptr1->getPointeeType(); |
| 4447 | Composite2 = Ptr2->getPointeeType(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4448 | |
Douglas Gregor | b2cb1cb | 2010-02-25 22:29:57 +0000 | [diff] [blame] | 4449 | // If we're allowed to create a non-standard composite type, keep track |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4450 | // of where we need to fill in additional 'const' qualifiers. |
Douglas Gregor | b2cb1cb | 2010-02-25 22:29:57 +0000 | [diff] [blame] | 4451 | if (NonStandardCompositeType && |
| 4452 | Composite1.getCVRQualifiers() != Composite2.getCVRQualifiers()) |
| 4453 | NeedConstBefore = QualifierUnion.size(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4454 | |
Douglas Gregor | 20b3e99 | 2009-08-24 17:42:35 +0000 | [diff] [blame] | 4455 | QualifierUnion.push_back( |
| 4456 | Composite1.getCVRQualifiers() | Composite2.getCVRQualifiers()); |
| 4457 | MemberOfClass.push_back(std::make_pair((const Type *)0, (const Type *)0)); |
| 4458 | continue; |
| 4459 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4460 | |
Douglas Gregor | 20b3e99 | 2009-08-24 17:42:35 +0000 | [diff] [blame] | 4461 | const MemberPointerType *MemPtr1, *MemPtr2; |
| 4462 | if ((MemPtr1 = Composite1->getAs<MemberPointerType>()) && |
| 4463 | (MemPtr2 = Composite2->getAs<MemberPointerType>())) { |
| 4464 | Composite1 = MemPtr1->getPointeeType(); |
| 4465 | Composite2 = MemPtr2->getPointeeType(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4466 | |
Douglas Gregor | b2cb1cb | 2010-02-25 22:29:57 +0000 | [diff] [blame] | 4467 | // If we're allowed to create a non-standard composite type, keep track |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4468 | // of where we need to fill in additional 'const' qualifiers. |
Douglas Gregor | b2cb1cb | 2010-02-25 22:29:57 +0000 | [diff] [blame] | 4469 | if (NonStandardCompositeType && |
| 4470 | Composite1.getCVRQualifiers() != Composite2.getCVRQualifiers()) |
| 4471 | NeedConstBefore = QualifierUnion.size(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4472 | |
Douglas Gregor | 20b3e99 | 2009-08-24 17:42:35 +0000 | [diff] [blame] | 4473 | QualifierUnion.push_back( |
| 4474 | Composite1.getCVRQualifiers() | Composite2.getCVRQualifiers()); |
| 4475 | MemberOfClass.push_back(std::make_pair(MemPtr1->getClass(), |
| 4476 | MemPtr2->getClass())); |
| 4477 | continue; |
| 4478 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4479 | |
Douglas Gregor | 20b3e99 | 2009-08-24 17:42:35 +0000 | [diff] [blame] | 4480 | // FIXME: block pointer types? |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4481 | |
Douglas Gregor | 20b3e99 | 2009-08-24 17:42:35 +0000 | [diff] [blame] | 4482 | // Cannot unwrap any more types. |
| 4483 | break; |
| 4484 | } while (true); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4485 | |
Douglas Gregor | b2cb1cb | 2010-02-25 22:29:57 +0000 | [diff] [blame] | 4486 | if (NeedConstBefore && NonStandardCompositeType) { |
| 4487 | // Extension: Add 'const' to qualifiers that come before the first qualifier |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4488 | // mismatch, so that our (non-standard!) composite type meets the |
Douglas Gregor | b2cb1cb | 2010-02-25 22:29:57 +0000 | [diff] [blame] | 4489 | // requirements of C++ [conv.qual]p4 bullet 3. |
| 4490 | for (unsigned I = 0; I != NeedConstBefore; ++I) { |
| 4491 | if ((QualifierUnion[I] & Qualifiers::Const) == 0) { |
| 4492 | QualifierUnion[I] = QualifierUnion[I] | Qualifiers::Const; |
| 4493 | *NonStandardCompositeType = true; |
| 4494 | } |
| 4495 | } |
| 4496 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4497 | |
Douglas Gregor | 20b3e99 | 2009-08-24 17:42:35 +0000 | [diff] [blame] | 4498 | // Rewrap the composites as pointers or member pointers with the union CVRs. |
Sebastian Redl | a439e6f | 2009-11-16 21:03:45 +0000 | [diff] [blame] | 4499 | ContainingClassVector::reverse_iterator MOC |
| 4500 | = MemberOfClass.rbegin(); |
| 4501 | for (QualifierVector::reverse_iterator |
| 4502 | I = QualifierUnion.rbegin(), |
| 4503 | E = QualifierUnion.rend(); |
Douglas Gregor | 20b3e99 | 2009-08-24 17:42:35 +0000 | [diff] [blame] | 4504 | I != E; (void)++I, ++MOC) { |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 4505 | Qualifiers Quals = Qualifiers::fromCVRMask(*I); |
Douglas Gregor | 20b3e99 | 2009-08-24 17:42:35 +0000 | [diff] [blame] | 4506 | if (MOC->first && MOC->second) { |
| 4507 | // Rebuild member pointer type |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 4508 | Composite1 = Context.getMemberPointerType( |
| 4509 | Context.getQualifiedType(Composite1, Quals), |
| 4510 | MOC->first); |
| 4511 | Composite2 = Context.getMemberPointerType( |
| 4512 | Context.getQualifiedType(Composite2, Quals), |
| 4513 | MOC->second); |
Douglas Gregor | 20b3e99 | 2009-08-24 17:42:35 +0000 | [diff] [blame] | 4514 | } else { |
| 4515 | // Rebuild pointer type |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 4516 | Composite1 |
| 4517 | = Context.getPointerType(Context.getQualifiedType(Composite1, Quals)); |
| 4518 | Composite2 |
| 4519 | = Context.getPointerType(Context.getQualifiedType(Composite2, Quals)); |
Douglas Gregor | 20b3e99 | 2009-08-24 17:42:35 +0000 | [diff] [blame] | 4520 | } |
Sebastian Redl | d1bd7fc | 2009-04-19 19:26:31 +0000 | [diff] [blame] | 4521 | } |
| 4522 | |
Douglas Gregor | 8f00dcf | 2010-04-16 23:20:25 +0000 | [diff] [blame] | 4523 | // Try to convert to the first composite pointer type. |
| 4524 | InitializedEntity Entity1 |
| 4525 | = InitializedEntity::InitializeTemporary(Composite1); |
| 4526 | InitializationKind Kind |
| 4527 | = InitializationKind::CreateCopy(Loc, SourceLocation()); |
| 4528 | InitializationSequence E1ToC1(*this, Entity1, Kind, &E1, 1); |
| 4529 | InitializationSequence E2ToC1(*this, Entity1, Kind, &E2, 1); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4530 | |
Douglas Gregor | 8f00dcf | 2010-04-16 23:20:25 +0000 | [diff] [blame] | 4531 | if (E1ToC1 && E2ToC1) { |
| 4532 | // Conversion to Composite1 is viable. |
| 4533 | if (!Context.hasSameType(Composite1, Composite2)) { |
| 4534 | // Composite2 is a different type from Composite1. Check whether |
| 4535 | // Composite2 is also viable. |
| 4536 | InitializedEntity Entity2 |
| 4537 | = InitializedEntity::InitializeTemporary(Composite2); |
| 4538 | InitializationSequence E1ToC2(*this, Entity2, Kind, &E1, 1); |
| 4539 | InitializationSequence E2ToC2(*this, Entity2, Kind, &E2, 1); |
| 4540 | if (E1ToC2 && E2ToC2) { |
| 4541 | // Both Composite1 and Composite2 are viable and are different; |
| 4542 | // this is an ambiguity. |
| 4543 | return QualType(); |
| 4544 | } |
| 4545 | } |
| 4546 | |
| 4547 | // Convert E1 to Composite1 |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 4548 | ExprResult E1Result |
Benjamin Kramer | 5354e77 | 2012-08-23 23:38:35 +0000 | [diff] [blame] | 4549 | = E1ToC1.Perform(*this, Entity1, Kind, E1); |
Douglas Gregor | 8f00dcf | 2010-04-16 23:20:25 +0000 | [diff] [blame] | 4550 | if (E1Result.isInvalid()) |
| 4551 | return QualType(); |
| 4552 | E1 = E1Result.takeAs<Expr>(); |
| 4553 | |
| 4554 | // Convert E2 to Composite1 |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 4555 | ExprResult E2Result |
Benjamin Kramer | 5354e77 | 2012-08-23 23:38:35 +0000 | [diff] [blame] | 4556 | = E2ToC1.Perform(*this, Entity1, Kind, E2); |
Douglas Gregor | 8f00dcf | 2010-04-16 23:20:25 +0000 | [diff] [blame] | 4557 | if (E2Result.isInvalid()) |
| 4558 | return QualType(); |
| 4559 | E2 = E2Result.takeAs<Expr>(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4560 | |
Douglas Gregor | 8f00dcf | 2010-04-16 23:20:25 +0000 | [diff] [blame] | 4561 | return Composite1; |
Sebastian Redl | d1bd7fc | 2009-04-19 19:26:31 +0000 | [diff] [blame] | 4562 | } |
| 4563 | |
Douglas Gregor | 8f00dcf | 2010-04-16 23:20:25 +0000 | [diff] [blame] | 4564 | // Check whether Composite2 is viable. |
| 4565 | InitializedEntity Entity2 |
| 4566 | = InitializedEntity::InitializeTemporary(Composite2); |
| 4567 | InitializationSequence E1ToC2(*this, Entity2, Kind, &E1, 1); |
| 4568 | InitializationSequence E2ToC2(*this, Entity2, Kind, &E2, 1); |
| 4569 | if (!E1ToC2 || !E2ToC2) |
| 4570 | return QualType(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4571 | |
Douglas Gregor | 8f00dcf | 2010-04-16 23:20:25 +0000 | [diff] [blame] | 4572 | // Convert E1 to Composite2 |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 4573 | ExprResult E1Result |
Benjamin Kramer | 5354e77 | 2012-08-23 23:38:35 +0000 | [diff] [blame] | 4574 | = E1ToC2.Perform(*this, Entity2, Kind, E1); |
Douglas Gregor | 8f00dcf | 2010-04-16 23:20:25 +0000 | [diff] [blame] | 4575 | if (E1Result.isInvalid()) |
| 4576 | return QualType(); |
| 4577 | E1 = E1Result.takeAs<Expr>(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4578 | |
Douglas Gregor | 8f00dcf | 2010-04-16 23:20:25 +0000 | [diff] [blame] | 4579 | // Convert E2 to Composite2 |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 4580 | ExprResult E2Result |
Benjamin Kramer | 5354e77 | 2012-08-23 23:38:35 +0000 | [diff] [blame] | 4581 | = E2ToC2.Perform(*this, Entity2, Kind, E2); |
Douglas Gregor | 8f00dcf | 2010-04-16 23:20:25 +0000 | [diff] [blame] | 4582 | if (E2Result.isInvalid()) |
| 4583 | return QualType(); |
| 4584 | E2 = E2Result.takeAs<Expr>(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4585 | |
Douglas Gregor | 8f00dcf | 2010-04-16 23:20:25 +0000 | [diff] [blame] | 4586 | return Composite2; |
Sebastian Redl | d1bd7fc | 2009-04-19 19:26:31 +0000 | [diff] [blame] | 4587 | } |
Anders Carlsson | 165a0a0 | 2009-05-17 18:41:29 +0000 | [diff] [blame] | 4588 | |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 4589 | ExprResult Sema::MaybeBindToTemporary(Expr *E) { |
Douglas Gregor | 19cc1c7 | 2010-11-01 21:10:29 +0000 | [diff] [blame] | 4590 | if (!E) |
| 4591 | return ExprError(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4592 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 4593 | assert(!isa<CXXBindTemporaryExpr>(E) && "Double-bound temporary?"); |
| 4594 | |
| 4595 | // If the result is a glvalue, we shouldn't bind it. |
| 4596 | if (!E->isRValue()) |
Anders Carlsson | 089c260 | 2009-08-15 23:41:35 +0000 | [diff] [blame] | 4597 | return Owned(E); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4598 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 4599 | // In ARC, calls that return a retainable type can return retained, |
| 4600 | // in which case we have to insert a consuming cast. |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 4601 | if (getLangOpts().ObjCAutoRefCount && |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 4602 | E->getType()->isObjCRetainableType()) { |
| 4603 | |
| 4604 | bool ReturnsRetained; |
| 4605 | |
| 4606 | // For actual calls, we compute this by examining the type of the |
| 4607 | // called value. |
| 4608 | if (CallExpr *Call = dyn_cast<CallExpr>(E)) { |
| 4609 | Expr *Callee = Call->getCallee()->IgnoreParens(); |
| 4610 | QualType T = Callee->getType(); |
| 4611 | |
| 4612 | if (T == Context.BoundMemberTy) { |
| 4613 | // Handle pointer-to-members. |
| 4614 | if (BinaryOperator *BinOp = dyn_cast<BinaryOperator>(Callee)) |
| 4615 | T = BinOp->getRHS()->getType(); |
| 4616 | else if (MemberExpr *Mem = dyn_cast<MemberExpr>(Callee)) |
| 4617 | T = Mem->getMemberDecl()->getType(); |
| 4618 | } |
| 4619 | |
| 4620 | if (const PointerType *Ptr = T->getAs<PointerType>()) |
| 4621 | T = Ptr->getPointeeType(); |
| 4622 | else if (const BlockPointerType *Ptr = T->getAs<BlockPointerType>()) |
| 4623 | T = Ptr->getPointeeType(); |
| 4624 | else if (const MemberPointerType *MemPtr = T->getAs<MemberPointerType>()) |
| 4625 | T = MemPtr->getPointeeType(); |
| 4626 | |
| 4627 | const FunctionType *FTy = T->getAs<FunctionType>(); |
| 4628 | assert(FTy && "call to value not of function type?"); |
| 4629 | ReturnsRetained = FTy->getExtInfo().getProducesResult(); |
| 4630 | |
| 4631 | // ActOnStmtExpr arranges things so that StmtExprs of retainable |
| 4632 | // type always produce a +1 object. |
| 4633 | } else if (isa<StmtExpr>(E)) { |
| 4634 | ReturnsRetained = true; |
| 4635 | |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 4636 | // We hit this case with the lambda conversion-to-block optimization; |
| 4637 | // we don't want any extra casts here. |
| 4638 | } else if (isa<CastExpr>(E) && |
| 4639 | isa<BlockExpr>(cast<CastExpr>(E)->getSubExpr())) { |
| 4640 | return Owned(E); |
| 4641 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 4642 | // For message sends and property references, we try to find an |
| 4643 | // actual method. FIXME: we should infer retention by selector in |
| 4644 | // cases where we don't have an actual method. |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 4645 | } else { |
| 4646 | ObjCMethodDecl *D = 0; |
| 4647 | if (ObjCMessageExpr *Send = dyn_cast<ObjCMessageExpr>(E)) { |
| 4648 | D = Send->getMethodDecl(); |
Patrick Beard | eb382ec | 2012-04-19 00:25:12 +0000 | [diff] [blame] | 4649 | } else if (ObjCBoxedExpr *BoxedExpr = dyn_cast<ObjCBoxedExpr>(E)) { |
| 4650 | D = BoxedExpr->getBoxingMethod(); |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 4651 | } else if (ObjCArrayLiteral *ArrayLit = dyn_cast<ObjCArrayLiteral>(E)) { |
| 4652 | D = ArrayLit->getArrayWithObjectsMethod(); |
| 4653 | } else if (ObjCDictionaryLiteral *DictLit |
| 4654 | = dyn_cast<ObjCDictionaryLiteral>(E)) { |
| 4655 | D = DictLit->getDictWithObjectsMethod(); |
| 4656 | } |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 4657 | |
| 4658 | ReturnsRetained = (D && D->hasAttr<NSReturnsRetainedAttr>()); |
John McCall | fc4b191 | 2011-08-03 07:02:44 +0000 | [diff] [blame] | 4659 | |
| 4660 | // Don't do reclaims on performSelector calls; despite their |
| 4661 | // return type, the invoked method doesn't necessarily actually |
| 4662 | // return an object. |
| 4663 | if (!ReturnsRetained && |
| 4664 | D && D->getMethodFamily() == OMF_performSelector) |
| 4665 | return Owned(E); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 4666 | } |
| 4667 | |
John McCall | 567c586 | 2011-11-14 19:53:16 +0000 | [diff] [blame] | 4668 | // Don't reclaim an object of Class type. |
| 4669 | if (!ReturnsRetained && E->getType()->isObjCARCImplicitlyUnretainedType()) |
| 4670 | return Owned(E); |
| 4671 | |
John McCall | 7e5e5f4 | 2011-07-07 06:58:02 +0000 | [diff] [blame] | 4672 | ExprNeedsCleanups = true; |
| 4673 | |
John McCall | 33e56f3 | 2011-09-10 06:18:15 +0000 | [diff] [blame] | 4674 | CastKind ck = (ReturnsRetained ? CK_ARCConsumeObject |
| 4675 | : CK_ARCReclaimReturnedObject); |
John McCall | 7e5e5f4 | 2011-07-07 06:58:02 +0000 | [diff] [blame] | 4676 | return Owned(ImplicitCastExpr::Create(Context, E->getType(), ck, E, 0, |
| 4677 | VK_RValue)); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 4678 | } |
| 4679 | |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 4680 | if (!getLangOpts().CPlusPlus) |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 4681 | return Owned(E); |
Douglas Gregor | 5132655 | 2009-12-24 18:51:59 +0000 | [diff] [blame] | 4682 | |
Peter Collingbourne | b4ab843 | 2012-01-26 03:33:51 +0000 | [diff] [blame] | 4683 | // Search for the base element type (cf. ASTContext::getBaseElementType) with |
| 4684 | // a fast path for the common case that the type is directly a RecordType. |
| 4685 | const Type *T = Context.getCanonicalType(E->getType().getTypePtr()); |
| 4686 | const RecordType *RT = 0; |
| 4687 | while (!RT) { |
| 4688 | switch (T->getTypeClass()) { |
| 4689 | case Type::Record: |
| 4690 | RT = cast<RecordType>(T); |
| 4691 | break; |
| 4692 | case Type::ConstantArray: |
| 4693 | case Type::IncompleteArray: |
| 4694 | case Type::VariableArray: |
| 4695 | case Type::DependentSizedArray: |
| 4696 | T = cast<ArrayType>(T)->getElementType().getTypePtr(); |
| 4697 | break; |
| 4698 | default: |
| 4699 | return Owned(E); |
| 4700 | } |
| 4701 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4702 | |
Richard Smith | 76f3f69 | 2012-02-22 02:04:18 +0000 | [diff] [blame] | 4703 | // That should be enough to guarantee that this type is complete, if we're |
| 4704 | // not processing a decltype expression. |
Jeffrey Yasskin | b7ee2e5 | 2011-01-27 19:17:54 +0000 | [diff] [blame] | 4705 | CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl()); |
Richard Smith | 213d70b | 2012-02-18 04:13:32 +0000 | [diff] [blame] | 4706 | if (RD->isInvalidDecl() || RD->isDependentContext()) |
John McCall | 86ff308 | 2010-02-04 22:26:26 +0000 | [diff] [blame] | 4707 | return Owned(E); |
Richard Smith | 76f3f69 | 2012-02-22 02:04:18 +0000 | [diff] [blame] | 4708 | |
| 4709 | bool IsDecltype = ExprEvalContexts.back().IsDecltype; |
| 4710 | CXXDestructorDecl *Destructor = IsDecltype ? 0 : LookupDestructor(RD); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 4711 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 4712 | if (Destructor) { |
Eli Friedman | 5f2987c | 2012-02-02 03:46:19 +0000 | [diff] [blame] | 4713 | MarkFunctionReferenced(E->getExprLoc(), Destructor); |
John McCall | c91cc66 | 2010-04-07 00:41:46 +0000 | [diff] [blame] | 4714 | CheckDestructorAccess(E->getExprLoc(), Destructor, |
| 4715 | PDiag(diag::err_access_dtor_temp) |
| 4716 | << E->getType()); |
Richard Smith | 213d70b | 2012-02-18 04:13:32 +0000 | [diff] [blame] | 4717 | DiagnoseUseOfDecl(Destructor, E->getExprLoc()); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 4718 | |
Richard Smith | 76f3f69 | 2012-02-22 02:04:18 +0000 | [diff] [blame] | 4719 | // If destructor is trivial, we can avoid the extra copy. |
| 4720 | if (Destructor->isTrivial()) |
| 4721 | return Owned(E); |
Richard Smith | 213d70b | 2012-02-18 04:13:32 +0000 | [diff] [blame] | 4722 | |
John McCall | 80ee6e8 | 2011-11-10 05:35:25 +0000 | [diff] [blame] | 4723 | // We need a cleanup, but we don't need to remember the temporary. |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 4724 | ExprNeedsCleanups = true; |
Richard Smith | 76f3f69 | 2012-02-22 02:04:18 +0000 | [diff] [blame] | 4725 | } |
Richard Smith | 213d70b | 2012-02-18 04:13:32 +0000 | [diff] [blame] | 4726 | |
| 4727 | CXXTemporary *Temp = CXXTemporary::Create(Context, Destructor); |
Richard Smith | 76f3f69 | 2012-02-22 02:04:18 +0000 | [diff] [blame] | 4728 | CXXBindTemporaryExpr *Bind = CXXBindTemporaryExpr::Create(Context, Temp, E); |
| 4729 | |
| 4730 | if (IsDecltype) |
| 4731 | ExprEvalContexts.back().DelayedDecltypeBinds.push_back(Bind); |
| 4732 | |
| 4733 | return Owned(Bind); |
Anders Carlsson | def1199 | 2009-05-30 20:36:53 +0000 | [diff] [blame] | 4734 | } |
| 4735 | |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4736 | ExprResult |
John McCall | 4765fa0 | 2010-12-06 08:20:24 +0000 | [diff] [blame] | 4737 | Sema::MaybeCreateExprWithCleanups(ExprResult SubExpr) { |
Douglas Gregor | 90f9382 | 2009-12-22 22:17:25 +0000 | [diff] [blame] | 4738 | if (SubExpr.isInvalid()) |
| 4739 | return ExprError(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4740 | |
John McCall | 4765fa0 | 2010-12-06 08:20:24 +0000 | [diff] [blame] | 4741 | return Owned(MaybeCreateExprWithCleanups(SubExpr.take())); |
Douglas Gregor | 90f9382 | 2009-12-22 22:17:25 +0000 | [diff] [blame] | 4742 | } |
| 4743 | |
John McCall | 80ee6e8 | 2011-11-10 05:35:25 +0000 | [diff] [blame] | 4744 | Expr *Sema::MaybeCreateExprWithCleanups(Expr *SubExpr) { |
| 4745 | assert(SubExpr && "sub expression can't be null!"); |
| 4746 | |
Eli Friedman | d2cce13 | 2012-02-02 23:15:15 +0000 | [diff] [blame] | 4747 | CleanupVarDeclMarking(); |
| 4748 | |
John McCall | 80ee6e8 | 2011-11-10 05:35:25 +0000 | [diff] [blame] | 4749 | unsigned FirstCleanup = ExprEvalContexts.back().NumCleanupObjects; |
| 4750 | assert(ExprCleanupObjects.size() >= FirstCleanup); |
| 4751 | assert(ExprNeedsCleanups || ExprCleanupObjects.size() == FirstCleanup); |
| 4752 | if (!ExprNeedsCleanups) |
| 4753 | return SubExpr; |
| 4754 | |
| 4755 | ArrayRef<ExprWithCleanups::CleanupObject> Cleanups |
| 4756 | = llvm::makeArrayRef(ExprCleanupObjects.begin() + FirstCleanup, |
| 4757 | ExprCleanupObjects.size() - FirstCleanup); |
| 4758 | |
| 4759 | Expr *E = ExprWithCleanups::Create(Context, SubExpr, Cleanups); |
| 4760 | DiscardCleanupsInEvaluationContext(); |
| 4761 | |
| 4762 | return E; |
| 4763 | } |
| 4764 | |
John McCall | 4765fa0 | 2010-12-06 08:20:24 +0000 | [diff] [blame] | 4765 | Stmt *Sema::MaybeCreateStmtWithCleanups(Stmt *SubStmt) { |
Argyrios Kyrtzidis | bf8cafa | 2010-11-02 02:33:08 +0000 | [diff] [blame] | 4766 | assert(SubStmt && "sub statement can't be null!"); |
| 4767 | |
Eli Friedman | d2cce13 | 2012-02-02 23:15:15 +0000 | [diff] [blame] | 4768 | CleanupVarDeclMarking(); |
| 4769 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 4770 | if (!ExprNeedsCleanups) |
Argyrios Kyrtzidis | bf8cafa | 2010-11-02 02:33:08 +0000 | [diff] [blame] | 4771 | return SubStmt; |
| 4772 | |
| 4773 | // FIXME: In order to attach the temporaries, wrap the statement into |
| 4774 | // a StmtExpr; currently this is only used for asm statements. |
| 4775 | // This is hacky, either create a new CXXStmtWithTemporaries statement or |
| 4776 | // a new AsmStmtWithTemporaries. |
| 4777 | CompoundStmt *CompStmt = new (Context) CompoundStmt(Context, &SubStmt, 1, |
| 4778 | SourceLocation(), |
| 4779 | SourceLocation()); |
| 4780 | Expr *E = new (Context) StmtExpr(CompStmt, Context.VoidTy, SourceLocation(), |
| 4781 | SourceLocation()); |
John McCall | 4765fa0 | 2010-12-06 08:20:24 +0000 | [diff] [blame] | 4782 | return MaybeCreateExprWithCleanups(E); |
Argyrios Kyrtzidis | bf8cafa | 2010-11-02 02:33:08 +0000 | [diff] [blame] | 4783 | } |
| 4784 | |
Richard Smith | 76f3f69 | 2012-02-22 02:04:18 +0000 | [diff] [blame] | 4785 | /// Process the expression contained within a decltype. For such expressions, |
| 4786 | /// certain semantic checks on temporaries are delayed until this point, and |
| 4787 | /// are omitted for the 'topmost' call in the decltype expression. If the |
| 4788 | /// topmost call bound a temporary, strip that temporary off the expression. |
| 4789 | ExprResult Sema::ActOnDecltypeExpression(Expr *E) { |
Benjamin Kramer | 1b48633 | 2012-11-15 15:18:42 +0000 | [diff] [blame] | 4790 | assert(ExprEvalContexts.back().IsDecltype && "not in a decltype expression"); |
Richard Smith | 76f3f69 | 2012-02-22 02:04:18 +0000 | [diff] [blame] | 4791 | |
| 4792 | // C++11 [expr.call]p11: |
| 4793 | // If a function call is a prvalue of object type, |
| 4794 | // -- if the function call is either |
| 4795 | // -- the operand of a decltype-specifier, or |
| 4796 | // -- the right operand of a comma operator that is the operand of a |
| 4797 | // decltype-specifier, |
| 4798 | // a temporary object is not introduced for the prvalue. |
| 4799 | |
| 4800 | // Recursively rebuild ParenExprs and comma expressions to strip out the |
| 4801 | // outermost CXXBindTemporaryExpr, if any. |
| 4802 | if (ParenExpr *PE = dyn_cast<ParenExpr>(E)) { |
| 4803 | ExprResult SubExpr = ActOnDecltypeExpression(PE->getSubExpr()); |
| 4804 | if (SubExpr.isInvalid()) |
| 4805 | return ExprError(); |
| 4806 | if (SubExpr.get() == PE->getSubExpr()) |
| 4807 | return Owned(E); |
| 4808 | return ActOnParenExpr(PE->getLParen(), PE->getRParen(), SubExpr.take()); |
| 4809 | } |
| 4810 | if (BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) { |
| 4811 | if (BO->getOpcode() == BO_Comma) { |
| 4812 | ExprResult RHS = ActOnDecltypeExpression(BO->getRHS()); |
| 4813 | if (RHS.isInvalid()) |
| 4814 | return ExprError(); |
| 4815 | if (RHS.get() == BO->getRHS()) |
| 4816 | return Owned(E); |
| 4817 | return Owned(new (Context) BinaryOperator(BO->getLHS(), RHS.take(), |
| 4818 | BO_Comma, BO->getType(), |
| 4819 | BO->getValueKind(), |
| 4820 | BO->getObjectKind(), |
Lang Hames | be9af12 | 2012-10-02 04:45:10 +0000 | [diff] [blame] | 4821 | BO->getOperatorLoc(), |
| 4822 | BO->isFPContractable())); |
Richard Smith | 76f3f69 | 2012-02-22 02:04:18 +0000 | [diff] [blame] | 4823 | } |
| 4824 | } |
| 4825 | |
| 4826 | CXXBindTemporaryExpr *TopBind = dyn_cast<CXXBindTemporaryExpr>(E); |
| 4827 | if (TopBind) |
| 4828 | E = TopBind->getSubExpr(); |
| 4829 | |
| 4830 | // Disable the special decltype handling now. |
Benjamin Kramer | 1b48633 | 2012-11-15 15:18:42 +0000 | [diff] [blame] | 4831 | ExprEvalContexts.back().IsDecltype = false; |
Richard Smith | 76f3f69 | 2012-02-22 02:04:18 +0000 | [diff] [blame] | 4832 | |
Richard Smith | d22f084 | 2012-07-28 19:54:11 +0000 | [diff] [blame] | 4833 | // In MS mode, don't perform any extra checking of call return types within a |
| 4834 | // decltype expression. |
| 4835 | if (getLangOpts().MicrosoftMode) |
| 4836 | return Owned(E); |
| 4837 | |
Richard Smith | 76f3f69 | 2012-02-22 02:04:18 +0000 | [diff] [blame] | 4838 | // Perform the semantic checks we delayed until this point. |
| 4839 | CallExpr *TopCall = dyn_cast<CallExpr>(E); |
Benjamin Kramer | 1b48633 | 2012-11-15 15:18:42 +0000 | [diff] [blame] | 4840 | for (unsigned I = 0, N = ExprEvalContexts.back().DelayedDecltypeCalls.size(); |
| 4841 | I != N; ++I) { |
| 4842 | CallExpr *Call = ExprEvalContexts.back().DelayedDecltypeCalls[I]; |
Richard Smith | 76f3f69 | 2012-02-22 02:04:18 +0000 | [diff] [blame] | 4843 | if (Call == TopCall) |
| 4844 | continue; |
| 4845 | |
| 4846 | if (CheckCallReturnType(Call->getCallReturnType(), |
Daniel Dunbar | 96a0014 | 2012-03-09 18:35:03 +0000 | [diff] [blame] | 4847 | Call->getLocStart(), |
Richard Smith | 76f3f69 | 2012-02-22 02:04:18 +0000 | [diff] [blame] | 4848 | Call, Call->getDirectCallee())) |
| 4849 | return ExprError(); |
| 4850 | } |
| 4851 | |
| 4852 | // Now all relevant types are complete, check the destructors are accessible |
| 4853 | // and non-deleted, and annotate them on the temporaries. |
Benjamin Kramer | 1b48633 | 2012-11-15 15:18:42 +0000 | [diff] [blame] | 4854 | for (unsigned I = 0, N = ExprEvalContexts.back().DelayedDecltypeBinds.size(); |
| 4855 | I != N; ++I) { |
| 4856 | CXXBindTemporaryExpr *Bind = |
| 4857 | ExprEvalContexts.back().DelayedDecltypeBinds[I]; |
Richard Smith | 76f3f69 | 2012-02-22 02:04:18 +0000 | [diff] [blame] | 4858 | if (Bind == TopBind) |
| 4859 | continue; |
| 4860 | |
| 4861 | CXXTemporary *Temp = Bind->getTemporary(); |
| 4862 | |
| 4863 | CXXRecordDecl *RD = |
| 4864 | Bind->getType()->getBaseElementTypeUnsafe()->getAsCXXRecordDecl(); |
| 4865 | CXXDestructorDecl *Destructor = LookupDestructor(RD); |
| 4866 | Temp->setDestructor(Destructor); |
| 4867 | |
Richard Smith | 2f68ca0 | 2012-05-11 22:20:10 +0000 | [diff] [blame] | 4868 | MarkFunctionReferenced(Bind->getExprLoc(), Destructor); |
| 4869 | CheckDestructorAccess(Bind->getExprLoc(), Destructor, |
Richard Smith | 76f3f69 | 2012-02-22 02:04:18 +0000 | [diff] [blame] | 4870 | PDiag(diag::err_access_dtor_temp) |
Richard Smith | 2f68ca0 | 2012-05-11 22:20:10 +0000 | [diff] [blame] | 4871 | << Bind->getType()); |
| 4872 | DiagnoseUseOfDecl(Destructor, Bind->getExprLoc()); |
Richard Smith | 76f3f69 | 2012-02-22 02:04:18 +0000 | [diff] [blame] | 4873 | |
| 4874 | // We need a cleanup, but we don't need to remember the temporary. |
| 4875 | ExprNeedsCleanups = true; |
| 4876 | } |
| 4877 | |
| 4878 | // Possibly strip off the top CXXBindTemporaryExpr. |
| 4879 | return Owned(E); |
| 4880 | } |
| 4881 | |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 4882 | ExprResult |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 4883 | Sema::ActOnStartCXXMemberReference(Scope *S, Expr *Base, SourceLocation OpLoc, |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 4884 | tok::TokenKind OpKind, ParsedType &ObjectType, |
Douglas Gregor | d4dca08 | 2010-02-24 18:44:31 +0000 | [diff] [blame] | 4885 | bool &MayBePseudoDestructor) { |
Douglas Gregor | 2dd078a | 2009-09-02 22:59:36 +0000 | [diff] [blame] | 4886 | // Since this might be a postfix expression, get rid of ParenListExprs. |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 4887 | ExprResult Result = MaybeConvertParenListExprToParenExpr(S, Base); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 4888 | if (Result.isInvalid()) return ExprError(); |
| 4889 | Base = Result.get(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4890 | |
John McCall | 3c3b7f9 | 2011-10-25 17:37:35 +0000 | [diff] [blame] | 4891 | Result = CheckPlaceholderExpr(Base); |
| 4892 | if (Result.isInvalid()) return ExprError(); |
| 4893 | Base = Result.take(); |
| 4894 | |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 4895 | QualType BaseType = Base->getType(); |
Douglas Gregor | d4dca08 | 2010-02-24 18:44:31 +0000 | [diff] [blame] | 4896 | MayBePseudoDestructor = false; |
Douglas Gregor | 2dd078a | 2009-09-02 22:59:36 +0000 | [diff] [blame] | 4897 | if (BaseType->isDependentType()) { |
Douglas Gregor | 43d8863 | 2009-11-04 22:49:18 +0000 | [diff] [blame] | 4898 | // If we have a pointer to a dependent type and are using the -> operator, |
| 4899 | // the object type is the type that the pointer points to. We might still |
| 4900 | // have enough information about that type to do something useful. |
| 4901 | if (OpKind == tok::arrow) |
| 4902 | if (const PointerType *Ptr = BaseType->getAs<PointerType>()) |
| 4903 | BaseType = Ptr->getPointeeType(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4904 | |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 4905 | ObjectType = ParsedType::make(BaseType); |
Douglas Gregor | d4dca08 | 2010-02-24 18:44:31 +0000 | [diff] [blame] | 4906 | MayBePseudoDestructor = true; |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 4907 | return Owned(Base); |
Douglas Gregor | 2dd078a | 2009-09-02 22:59:36 +0000 | [diff] [blame] | 4908 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4909 | |
Douglas Gregor | 2dd078a | 2009-09-02 22:59:36 +0000 | [diff] [blame] | 4910 | // C++ [over.match.oper]p8: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4911 | // [...] When operator->returns, the operator-> is applied to the value |
Douglas Gregor | 2dd078a | 2009-09-02 22:59:36 +0000 | [diff] [blame] | 4912 | // returned, with the original second operand. |
| 4913 | if (OpKind == tok::arrow) { |
John McCall | c4e8321 | 2009-09-30 01:01:30 +0000 | [diff] [blame] | 4914 | // The set of types we've considered so far. |
John McCall | 432887f | 2009-09-30 01:30:54 +0000 | [diff] [blame] | 4915 | llvm::SmallPtrSet<CanQualType,8> CTypes; |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 4916 | SmallVector<SourceLocation, 8> Locations; |
John McCall | 432887f | 2009-09-30 01:30:54 +0000 | [diff] [blame] | 4917 | CTypes.insert(Context.getCanonicalType(BaseType)); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4918 | |
Douglas Gregor | 2dd078a | 2009-09-02 22:59:36 +0000 | [diff] [blame] | 4919 | while (BaseType->isRecordType()) { |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 4920 | Result = BuildOverloadedArrowExpr(S, Base, OpLoc); |
| 4921 | if (Result.isInvalid()) |
Douglas Gregor | 2dd078a | 2009-09-02 22:59:36 +0000 | [diff] [blame] | 4922 | return ExprError(); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 4923 | Base = Result.get(); |
| 4924 | if (CXXOperatorCallExpr *OpCall = dyn_cast<CXXOperatorCallExpr>(Base)) |
Anders Carlsson | de699e5 | 2009-10-13 22:55:59 +0000 | [diff] [blame] | 4925 | Locations.push_back(OpCall->getDirectCallee()->getLocation()); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 4926 | BaseType = Base->getType(); |
John McCall | c4e8321 | 2009-09-30 01:01:30 +0000 | [diff] [blame] | 4927 | CanQualType CBaseType = Context.getCanonicalType(BaseType); |
John McCall | 432887f | 2009-09-30 01:30:54 +0000 | [diff] [blame] | 4928 | if (!CTypes.insert(CBaseType)) { |
Fariborz Jahanian | 4a4e345 | 2009-09-30 00:19:41 +0000 | [diff] [blame] | 4929 | Diag(OpLoc, diag::err_operator_arrow_circular); |
Fariborz Jahanian | 7a8233a | 2009-09-30 17:46:20 +0000 | [diff] [blame] | 4930 | for (unsigned i = 0; i < Locations.size(); i++) |
| 4931 | Diag(Locations[i], diag::note_declared_at); |
Fariborz Jahanian | 4a4e345 | 2009-09-30 00:19:41 +0000 | [diff] [blame] | 4932 | return ExprError(); |
| 4933 | } |
Douglas Gregor | 2dd078a | 2009-09-02 22:59:36 +0000 | [diff] [blame] | 4934 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4935 | |
Douglas Gregor | 1d7049a | 2012-01-12 16:11:24 +0000 | [diff] [blame] | 4936 | if (BaseType->isPointerType() || BaseType->isObjCObjectPointerType()) |
Douglas Gregor | 31658df | 2009-11-20 19:58:21 +0000 | [diff] [blame] | 4937 | BaseType = BaseType->getPointeeType(); |
| 4938 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4939 | |
Douglas Gregor | 1d7049a | 2012-01-12 16:11:24 +0000 | [diff] [blame] | 4940 | // Objective-C properties allow "." access on Objective-C pointer types, |
| 4941 | // so adjust the base type to the object type itself. |
| 4942 | if (BaseType->isObjCObjectPointerType()) |
| 4943 | BaseType = BaseType->getPointeeType(); |
| 4944 | |
| 4945 | // C++ [basic.lookup.classref]p2: |
| 4946 | // [...] If the type of the object expression is of pointer to scalar |
| 4947 | // type, the unqualified-id is looked up in the context of the complete |
| 4948 | // postfix-expression. |
| 4949 | // |
| 4950 | // This also indicates that we could be parsing a pseudo-destructor-name. |
| 4951 | // Note that Objective-C class and object types can be pseudo-destructor |
| 4952 | // expressions or normal member (ivar or property) access expressions. |
| 4953 | if (BaseType->isObjCObjectOrInterfaceType()) { |
| 4954 | MayBePseudoDestructor = true; |
| 4955 | } else if (!BaseType->isRecordType()) { |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 4956 | ObjectType = ParsedType(); |
Douglas Gregor | d4dca08 | 2010-02-24 18:44:31 +0000 | [diff] [blame] | 4957 | MayBePseudoDestructor = true; |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 4958 | return Owned(Base); |
Douglas Gregor | c68afe2 | 2009-09-03 21:38:09 +0000 | [diff] [blame] | 4959 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4960 | |
Douglas Gregor | cefc3af | 2012-04-16 07:05:22 +0000 | [diff] [blame] | 4961 | // The object type must be complete (or dependent), or |
| 4962 | // C++11 [expr.prim.general]p3: |
| 4963 | // Unlike the object expression in other contexts, *this is not required to |
| 4964 | // be of complete type for purposes of class member access (5.2.5) outside |
| 4965 | // the member function body. |
Douglas Gregor | 03c5705 | 2009-11-17 05:17:33 +0000 | [diff] [blame] | 4966 | if (!BaseType->isDependentType() && |
Douglas Gregor | cefc3af | 2012-04-16 07:05:22 +0000 | [diff] [blame] | 4967 | !isThisOutsideMemberFunctionBody(BaseType) && |
Douglas Gregor | d10099e | 2012-05-04 16:32:21 +0000 | [diff] [blame] | 4968 | RequireCompleteType(OpLoc, BaseType, diag::err_incomplete_member_access)) |
Douglas Gregor | 03c5705 | 2009-11-17 05:17:33 +0000 | [diff] [blame] | 4969 | return ExprError(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4970 | |
Douglas Gregor | c68afe2 | 2009-09-03 21:38:09 +0000 | [diff] [blame] | 4971 | // C++ [basic.lookup.classref]p2: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4972 | // If the id-expression in a class member access (5.2.5) is an |
Douglas Gregor | 03c5705 | 2009-11-17 05:17:33 +0000 | [diff] [blame] | 4973 | // unqualified-id, and the type of the object expression is of a class |
Douglas Gregor | c68afe2 | 2009-09-03 21:38:09 +0000 | [diff] [blame] | 4974 | // type C (or of pointer to a class type C), the unqualified-id is looked |
| 4975 | // up in the scope of class C. [...] |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 4976 | ObjectType = ParsedType::make(BaseType); |
Benjamin Kramer | 3fe198b | 2012-08-23 21:35:17 +0000 | [diff] [blame] | 4977 | return Base; |
Douglas Gregor | 2dd078a | 2009-09-02 22:59:36 +0000 | [diff] [blame] | 4978 | } |
| 4979 | |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 4980 | ExprResult Sema::DiagnoseDtorReference(SourceLocation NameLoc, |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 4981 | Expr *MemExpr) { |
Douglas Gregor | 7754908 | 2010-02-24 21:29:12 +0000 | [diff] [blame] | 4982 | SourceLocation ExpectedLParenLoc = PP.getLocForEndOfToken(NameLoc); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 4983 | Diag(MemExpr->getLocStart(), diag::err_dtor_expr_without_call) |
| 4984 | << isa<CXXPseudoDestructorExpr>(MemExpr) |
Douglas Gregor | 849b243 | 2010-03-31 17:46:05 +0000 | [diff] [blame] | 4985 | << FixItHint::CreateInsertion(ExpectedLParenLoc, "()"); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 4986 | |
Douglas Gregor | 7754908 | 2010-02-24 21:29:12 +0000 | [diff] [blame] | 4987 | return ActOnCallExpr(/*Scope*/ 0, |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 4988 | MemExpr, |
Douglas Gregor | 7754908 | 2010-02-24 21:29:12 +0000 | [diff] [blame] | 4989 | /*LPLoc*/ ExpectedLParenLoc, |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 4990 | MultiExprArg(), |
Douglas Gregor | 7754908 | 2010-02-24 21:29:12 +0000 | [diff] [blame] | 4991 | /*RPLoc*/ ExpectedLParenLoc); |
| 4992 | } |
Douglas Gregor | d4dca08 | 2010-02-24 18:44:31 +0000 | [diff] [blame] | 4993 | |
Eli Friedman | e0dbedf | 2012-01-25 04:29:24 +0000 | [diff] [blame] | 4994 | static bool CheckArrow(Sema& S, QualType& ObjectType, Expr *&Base, |
David Blaikie | 91ec789 | 2011-12-16 16:03:09 +0000 | [diff] [blame] | 4995 | tok::TokenKind& OpKind, SourceLocation OpLoc) { |
Eli Friedman | e0dbedf | 2012-01-25 04:29:24 +0000 | [diff] [blame] | 4996 | if (Base->hasPlaceholderType()) { |
| 4997 | ExprResult result = S.CheckPlaceholderExpr(Base); |
| 4998 | if (result.isInvalid()) return true; |
| 4999 | Base = result.take(); |
| 5000 | } |
| 5001 | ObjectType = Base->getType(); |
| 5002 | |
David Blaikie | 91ec789 | 2011-12-16 16:03:09 +0000 | [diff] [blame] | 5003 | // C++ [expr.pseudo]p2: |
| 5004 | // The left-hand side of the dot operator shall be of scalar type. The |
| 5005 | // left-hand side of the arrow operator shall be of pointer to scalar type. |
| 5006 | // This scalar type is the object type. |
Eli Friedman | e0dbedf | 2012-01-25 04:29:24 +0000 | [diff] [blame] | 5007 | // Note that this is rather different from the normal handling for the |
| 5008 | // arrow operator. |
David Blaikie | 91ec789 | 2011-12-16 16:03:09 +0000 | [diff] [blame] | 5009 | if (OpKind == tok::arrow) { |
| 5010 | if (const PointerType *Ptr = ObjectType->getAs<PointerType>()) { |
| 5011 | ObjectType = Ptr->getPointeeType(); |
| 5012 | } else if (!Base->isTypeDependent()) { |
| 5013 | // The user wrote "p->" when she probably meant "p."; fix it. |
| 5014 | S.Diag(OpLoc, diag::err_typecheck_member_reference_suggestion) |
| 5015 | << ObjectType << true |
| 5016 | << FixItHint::CreateReplacement(OpLoc, "."); |
| 5017 | if (S.isSFINAEContext()) |
| 5018 | return true; |
| 5019 | |
| 5020 | OpKind = tok::period; |
| 5021 | } |
| 5022 | } |
| 5023 | |
| 5024 | return false; |
| 5025 | } |
| 5026 | |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 5027 | ExprResult Sema::BuildPseudoDestructorExpr(Expr *Base, |
John McCall | 2d9f5fa | 2011-02-25 05:21:17 +0000 | [diff] [blame] | 5028 | SourceLocation OpLoc, |
| 5029 | tok::TokenKind OpKind, |
| 5030 | const CXXScopeSpec &SS, |
| 5031 | TypeSourceInfo *ScopeTypeInfo, |
| 5032 | SourceLocation CCLoc, |
| 5033 | SourceLocation TildeLoc, |
Douglas Gregor | a2e7dd2 | 2010-02-25 01:56:36 +0000 | [diff] [blame] | 5034 | PseudoDestructorTypeStorage Destructed, |
John McCall | 2d9f5fa | 2011-02-25 05:21:17 +0000 | [diff] [blame] | 5035 | bool HasTrailingLParen) { |
Douglas Gregor | a2e7dd2 | 2010-02-25 01:56:36 +0000 | [diff] [blame] | 5036 | TypeSourceInfo *DestructedTypeInfo = Destructed.getTypeSourceInfo(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5037 | |
Eli Friedman | 8c9fe20 | 2012-01-25 04:35:06 +0000 | [diff] [blame] | 5038 | QualType ObjectType; |
David Blaikie | 91ec789 | 2011-12-16 16:03:09 +0000 | [diff] [blame] | 5039 | if (CheckArrow(*this, ObjectType, Base, OpKind, OpLoc)) |
| 5040 | return ExprError(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5041 | |
Douglas Gregor | 0cb8939 | 2012-09-10 14:57:06 +0000 | [diff] [blame] | 5042 | if (!ObjectType->isDependentType() && !ObjectType->isScalarType() && |
| 5043 | !ObjectType->isVectorType()) { |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 5044 | if (getLangOpts().MicrosoftMode && ObjectType->isVoidType()) |
Nico Weber | 2d757ec | 2012-01-23 06:08:16 +0000 | [diff] [blame] | 5045 | Diag(OpLoc, diag::ext_pseudo_dtor_on_void) << Base->getSourceRange(); |
Nico Weber | df1be86 | 2012-01-23 05:50:57 +0000 | [diff] [blame] | 5046 | else |
| 5047 | Diag(OpLoc, diag::err_pseudo_dtor_base_not_scalar) |
| 5048 | << ObjectType << Base->getSourceRange(); |
Douglas Gregor | b57fb49 | 2010-02-24 22:38:50 +0000 | [diff] [blame] | 5049 | return ExprError(); |
| 5050 | } |
| 5051 | |
| 5052 | // C++ [expr.pseudo]p2: |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5053 | // [...] The cv-unqualified versions of the object type and of the type |
Douglas Gregor | b57fb49 | 2010-02-24 22:38:50 +0000 | [diff] [blame] | 5054 | // designated by the pseudo-destructor-name shall be the same type. |
Douglas Gregor | a2e7dd2 | 2010-02-25 01:56:36 +0000 | [diff] [blame] | 5055 | if (DestructedTypeInfo) { |
| 5056 | QualType DestructedType = DestructedTypeInfo->getType(); |
| 5057 | SourceLocation DestructedTypeStart |
Abramo Bagnara | bd054db | 2010-05-20 10:00:11 +0000 | [diff] [blame] | 5058 | = DestructedTypeInfo->getTypeLoc().getLocalSourceRange().getBegin(); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 5059 | if (!DestructedType->isDependentType() && !ObjectType->isDependentType()) { |
| 5060 | if (!Context.hasSameUnqualifiedType(DestructedType, ObjectType)) { |
| 5061 | Diag(DestructedTypeStart, diag::err_pseudo_dtor_type_mismatch) |
| 5062 | << ObjectType << DestructedType << Base->getSourceRange() |
| 5063 | << DestructedTypeInfo->getTypeLoc().getLocalSourceRange(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5064 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 5065 | // Recover by setting the destructed type to the object type. |
| 5066 | DestructedType = ObjectType; |
| 5067 | DestructedTypeInfo = Context.getTrivialTypeSourceInfo(ObjectType, |
Douglas Gregor | a2e7dd2 | 2010-02-25 01:56:36 +0000 | [diff] [blame] | 5068 | DestructedTypeStart); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 5069 | Destructed = PseudoDestructorTypeStorage(DestructedTypeInfo); |
| 5070 | } else if (DestructedType.getObjCLifetime() != |
| 5071 | ObjectType.getObjCLifetime()) { |
| 5072 | |
| 5073 | if (DestructedType.getObjCLifetime() == Qualifiers::OCL_None) { |
| 5074 | // Okay: just pretend that the user provided the correctly-qualified |
| 5075 | // type. |
| 5076 | } else { |
| 5077 | Diag(DestructedTypeStart, diag::err_arc_pseudo_dtor_inconstant_quals) |
| 5078 | << ObjectType << DestructedType << Base->getSourceRange() |
| 5079 | << DestructedTypeInfo->getTypeLoc().getLocalSourceRange(); |
| 5080 | } |
| 5081 | |
| 5082 | // Recover by setting the destructed type to the object type. |
| 5083 | DestructedType = ObjectType; |
| 5084 | DestructedTypeInfo = Context.getTrivialTypeSourceInfo(ObjectType, |
| 5085 | DestructedTypeStart); |
| 5086 | Destructed = PseudoDestructorTypeStorage(DestructedTypeInfo); |
| 5087 | } |
Douglas Gregor | a2e7dd2 | 2010-02-25 01:56:36 +0000 | [diff] [blame] | 5088 | } |
Douglas Gregor | b57fb49 | 2010-02-24 22:38:50 +0000 | [diff] [blame] | 5089 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5090 | |
Douglas Gregor | b57fb49 | 2010-02-24 22:38:50 +0000 | [diff] [blame] | 5091 | // C++ [expr.pseudo]p2: |
| 5092 | // [...] Furthermore, the two type-names in a pseudo-destructor-name of the |
| 5093 | // form |
| 5094 | // |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5095 | // ::[opt] nested-name-specifier[opt] type-name :: ~ type-name |
Douglas Gregor | b57fb49 | 2010-02-24 22:38:50 +0000 | [diff] [blame] | 5096 | // |
| 5097 | // shall designate the same scalar type. |
| 5098 | if (ScopeTypeInfo) { |
| 5099 | QualType ScopeType = ScopeTypeInfo->getType(); |
| 5100 | if (!ScopeType->isDependentType() && !ObjectType->isDependentType() && |
John McCall | 81e317a | 2010-06-11 17:36:40 +0000 | [diff] [blame] | 5101 | !Context.hasSameUnqualifiedType(ScopeType, ObjectType)) { |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5102 | |
Abramo Bagnara | bd054db | 2010-05-20 10:00:11 +0000 | [diff] [blame] | 5103 | Diag(ScopeTypeInfo->getTypeLoc().getLocalSourceRange().getBegin(), |
Douglas Gregor | b57fb49 | 2010-02-24 22:38:50 +0000 | [diff] [blame] | 5104 | diag::err_pseudo_dtor_type_mismatch) |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 5105 | << ObjectType << ScopeType << Base->getSourceRange() |
Abramo Bagnara | bd054db | 2010-05-20 10:00:11 +0000 | [diff] [blame] | 5106 | << ScopeTypeInfo->getTypeLoc().getLocalSourceRange(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5107 | |
Douglas Gregor | b57fb49 | 2010-02-24 22:38:50 +0000 | [diff] [blame] | 5108 | ScopeType = QualType(); |
| 5109 | ScopeTypeInfo = 0; |
| 5110 | } |
| 5111 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5112 | |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 5113 | Expr *Result |
| 5114 | = new (Context) CXXPseudoDestructorExpr(Context, Base, |
| 5115 | OpKind == tok::arrow, OpLoc, |
Douglas Gregor | f3db29f | 2011-02-25 18:19:59 +0000 | [diff] [blame] | 5116 | SS.getWithLocInContext(Context), |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 5117 | ScopeTypeInfo, |
| 5118 | CCLoc, |
| 5119 | TildeLoc, |
| 5120 | Destructed); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5121 | |
Douglas Gregor | b57fb49 | 2010-02-24 22:38:50 +0000 | [diff] [blame] | 5122 | if (HasTrailingLParen) |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 5123 | return Owned(Result); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5124 | |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 5125 | return DiagnoseDtorReference(Destructed.getLocation(), Result); |
Douglas Gregor | 7754908 | 2010-02-24 21:29:12 +0000 | [diff] [blame] | 5126 | } |
| 5127 | |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 5128 | ExprResult Sema::ActOnPseudoDestructorExpr(Scope *S, Expr *Base, |
John McCall | 2d9f5fa | 2011-02-25 05:21:17 +0000 | [diff] [blame] | 5129 | SourceLocation OpLoc, |
| 5130 | tok::TokenKind OpKind, |
| 5131 | CXXScopeSpec &SS, |
| 5132 | UnqualifiedId &FirstTypeName, |
| 5133 | SourceLocation CCLoc, |
| 5134 | SourceLocation TildeLoc, |
| 5135 | UnqualifiedId &SecondTypeName, |
| 5136 | bool HasTrailingLParen) { |
Douglas Gregor | 7754908 | 2010-02-24 21:29:12 +0000 | [diff] [blame] | 5137 | assert((FirstTypeName.getKind() == UnqualifiedId::IK_TemplateId || |
| 5138 | FirstTypeName.getKind() == UnqualifiedId::IK_Identifier) && |
| 5139 | "Invalid first type name in pseudo-destructor"); |
| 5140 | assert((SecondTypeName.getKind() == UnqualifiedId::IK_TemplateId || |
| 5141 | SecondTypeName.getKind() == UnqualifiedId::IK_Identifier) && |
| 5142 | "Invalid second type name in pseudo-destructor"); |
| 5143 | |
Eli Friedman | 8c9fe20 | 2012-01-25 04:35:06 +0000 | [diff] [blame] | 5144 | QualType ObjectType; |
David Blaikie | 91ec789 | 2011-12-16 16:03:09 +0000 | [diff] [blame] | 5145 | if (CheckArrow(*this, ObjectType, Base, OpKind, OpLoc)) |
| 5146 | return ExprError(); |
Douglas Gregor | a2e7dd2 | 2010-02-25 01:56:36 +0000 | [diff] [blame] | 5147 | |
| 5148 | // Compute the object type that we should use for name lookup purposes. Only |
| 5149 | // record types and dependent types matter. |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 5150 | ParsedType ObjectTypePtrForLookup; |
Douglas Gregor | a2e7dd2 | 2010-02-25 01:56:36 +0000 | [diff] [blame] | 5151 | if (!SS.isSet()) { |
John McCall | 2d9f5fa | 2011-02-25 05:21:17 +0000 | [diff] [blame] | 5152 | if (ObjectType->isRecordType()) |
| 5153 | ObjectTypePtrForLookup = ParsedType::make(ObjectType); |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 5154 | else if (ObjectType->isDependentType()) |
| 5155 | ObjectTypePtrForLookup = ParsedType::make(Context.DependentTy); |
Douglas Gregor | a2e7dd2 | 2010-02-25 01:56:36 +0000 | [diff] [blame] | 5156 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5157 | |
| 5158 | // Convert the name of the type being destructed (following the ~) into a |
Douglas Gregor | b57fb49 | 2010-02-24 22:38:50 +0000 | [diff] [blame] | 5159 | // type (with source-location information). |
Douglas Gregor | 7754908 | 2010-02-24 21:29:12 +0000 | [diff] [blame] | 5160 | QualType DestructedType; |
| 5161 | TypeSourceInfo *DestructedTypeInfo = 0; |
Douglas Gregor | a2e7dd2 | 2010-02-25 01:56:36 +0000 | [diff] [blame] | 5162 | PseudoDestructorTypeStorage Destructed; |
Douglas Gregor | 7754908 | 2010-02-24 21:29:12 +0000 | [diff] [blame] | 5163 | if (SecondTypeName.getKind() == UnqualifiedId::IK_Identifier) { |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5164 | ParsedType T = getTypeName(*SecondTypeName.Identifier, |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 5165 | SecondTypeName.StartLocation, |
Fariborz Jahanian | 1e52dfc | 2011-02-08 18:05:59 +0000 | [diff] [blame] | 5166 | S, &SS, true, false, ObjectTypePtrForLookup); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5167 | if (!T && |
Douglas Gregor | a2e7dd2 | 2010-02-25 01:56:36 +0000 | [diff] [blame] | 5168 | ((SS.isSet() && !computeDeclContext(SS, false)) || |
| 5169 | (!SS.isSet() && ObjectType->isDependentType()))) { |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5170 | // The name of the type being destroyed is a dependent name, and we |
Douglas Gregor | a2e7dd2 | 2010-02-25 01:56:36 +0000 | [diff] [blame] | 5171 | // couldn't find anything useful in scope. Just store the identifier and |
| 5172 | // it's location, and we'll perform (qualified) name lookup again at |
| 5173 | // template instantiation time. |
| 5174 | Destructed = PseudoDestructorTypeStorage(SecondTypeName.Identifier, |
| 5175 | SecondTypeName.StartLocation); |
| 5176 | } else if (!T) { |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5177 | Diag(SecondTypeName.StartLocation, |
Douglas Gregor | 7754908 | 2010-02-24 21:29:12 +0000 | [diff] [blame] | 5178 | diag::err_pseudo_dtor_destructor_non_type) |
| 5179 | << SecondTypeName.Identifier << ObjectType; |
| 5180 | if (isSFINAEContext()) |
| 5181 | return ExprError(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5182 | |
Douglas Gregor | 7754908 | 2010-02-24 21:29:12 +0000 | [diff] [blame] | 5183 | // Recover by assuming we had the right type all along. |
| 5184 | DestructedType = ObjectType; |
Douglas Gregor | b57fb49 | 2010-02-24 22:38:50 +0000 | [diff] [blame] | 5185 | } else |
Douglas Gregor | 7754908 | 2010-02-24 21:29:12 +0000 | [diff] [blame] | 5186 | DestructedType = GetTypeFromParser(T, &DestructedTypeInfo); |
Douglas Gregor | 7754908 | 2010-02-24 21:29:12 +0000 | [diff] [blame] | 5187 | } else { |
Douglas Gregor | b57fb49 | 2010-02-24 22:38:50 +0000 | [diff] [blame] | 5188 | // Resolve the template-id to a type. |
Douglas Gregor | 7754908 | 2010-02-24 21:29:12 +0000 | [diff] [blame] | 5189 | TemplateIdAnnotation *TemplateId = SecondTypeName.TemplateId; |
Benjamin Kramer | 5354e77 | 2012-08-23 23:38:35 +0000 | [diff] [blame] | 5190 | ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(), |
Douglas Gregor | b57fb49 | 2010-02-24 22:38:50 +0000 | [diff] [blame] | 5191 | TemplateId->NumArgs); |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 5192 | TypeResult T = ActOnTemplateIdType(TemplateId->SS, |
Abramo Bagnara | 55d23c9 | 2012-02-06 14:41:24 +0000 | [diff] [blame] | 5193 | TemplateId->TemplateKWLoc, |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 5194 | TemplateId->Template, |
Douglas Gregor | b57fb49 | 2010-02-24 22:38:50 +0000 | [diff] [blame] | 5195 | TemplateId->TemplateNameLoc, |
| 5196 | TemplateId->LAngleLoc, |
| 5197 | TemplateArgsPtr, |
| 5198 | TemplateId->RAngleLoc); |
| 5199 | if (T.isInvalid() || !T.get()) { |
| 5200 | // Recover by assuming we had the right type all along. |
| 5201 | DestructedType = ObjectType; |
| 5202 | } else |
| 5203 | DestructedType = GetTypeFromParser(T.get(), &DestructedTypeInfo); |
Douglas Gregor | 7754908 | 2010-02-24 21:29:12 +0000 | [diff] [blame] | 5204 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5205 | |
| 5206 | // If we've performed some kind of recovery, (re-)build the type source |
Douglas Gregor | b57fb49 | 2010-02-24 22:38:50 +0000 | [diff] [blame] | 5207 | // information. |
Douglas Gregor | a2e7dd2 | 2010-02-25 01:56:36 +0000 | [diff] [blame] | 5208 | if (!DestructedType.isNull()) { |
| 5209 | if (!DestructedTypeInfo) |
| 5210 | DestructedTypeInfo = Context.getTrivialTypeSourceInfo(DestructedType, |
Douglas Gregor | b57fb49 | 2010-02-24 22:38:50 +0000 | [diff] [blame] | 5211 | SecondTypeName.StartLocation); |
Douglas Gregor | a2e7dd2 | 2010-02-25 01:56:36 +0000 | [diff] [blame] | 5212 | Destructed = PseudoDestructorTypeStorage(DestructedTypeInfo); |
| 5213 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5214 | |
Douglas Gregor | b57fb49 | 2010-02-24 22:38:50 +0000 | [diff] [blame] | 5215 | // Convert the name of the scope type (the type prior to '::') into a type. |
| 5216 | TypeSourceInfo *ScopeTypeInfo = 0; |
Douglas Gregor | 7754908 | 2010-02-24 21:29:12 +0000 | [diff] [blame] | 5217 | QualType ScopeType; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5218 | if (FirstTypeName.getKind() == UnqualifiedId::IK_TemplateId || |
Douglas Gregor | 7754908 | 2010-02-24 21:29:12 +0000 | [diff] [blame] | 5219 | FirstTypeName.Identifier) { |
| 5220 | if (FirstTypeName.getKind() == UnqualifiedId::IK_Identifier) { |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5221 | ParsedType T = getTypeName(*FirstTypeName.Identifier, |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 5222 | FirstTypeName.StartLocation, |
Douglas Gregor | f3db29f | 2011-02-25 18:19:59 +0000 | [diff] [blame] | 5223 | S, &SS, true, false, ObjectTypePtrForLookup); |
Douglas Gregor | 7754908 | 2010-02-24 21:29:12 +0000 | [diff] [blame] | 5224 | if (!T) { |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5225 | Diag(FirstTypeName.StartLocation, |
Douglas Gregor | 7754908 | 2010-02-24 21:29:12 +0000 | [diff] [blame] | 5226 | diag::err_pseudo_dtor_destructor_non_type) |
| 5227 | << FirstTypeName.Identifier << ObjectType; |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5228 | |
Douglas Gregor | b57fb49 | 2010-02-24 22:38:50 +0000 | [diff] [blame] | 5229 | if (isSFINAEContext()) |
| 5230 | return ExprError(); |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5231 | |
Douglas Gregor | b57fb49 | 2010-02-24 22:38:50 +0000 | [diff] [blame] | 5232 | // Just drop this type. It's unnecessary anyway. |
| 5233 | ScopeType = QualType(); |
| 5234 | } else |
| 5235 | ScopeType = GetTypeFromParser(T, &ScopeTypeInfo); |
Douglas Gregor | 7754908 | 2010-02-24 21:29:12 +0000 | [diff] [blame] | 5236 | } else { |
Douglas Gregor | b57fb49 | 2010-02-24 22:38:50 +0000 | [diff] [blame] | 5237 | // Resolve the template-id to a type. |
Douglas Gregor | 7754908 | 2010-02-24 21:29:12 +0000 | [diff] [blame] | 5238 | TemplateIdAnnotation *TemplateId = FirstTypeName.TemplateId; |
Benjamin Kramer | 5354e77 | 2012-08-23 23:38:35 +0000 | [diff] [blame] | 5239 | ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(), |
Douglas Gregor | b57fb49 | 2010-02-24 22:38:50 +0000 | [diff] [blame] | 5240 | TemplateId->NumArgs); |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 5241 | TypeResult T = ActOnTemplateIdType(TemplateId->SS, |
Abramo Bagnara | 55d23c9 | 2012-02-06 14:41:24 +0000 | [diff] [blame] | 5242 | TemplateId->TemplateKWLoc, |
Douglas Gregor | 059101f | 2011-03-02 00:47:37 +0000 | [diff] [blame] | 5243 | TemplateId->Template, |
Douglas Gregor | b57fb49 | 2010-02-24 22:38:50 +0000 | [diff] [blame] | 5244 | TemplateId->TemplateNameLoc, |
| 5245 | TemplateId->LAngleLoc, |
| 5246 | TemplateArgsPtr, |
| 5247 | TemplateId->RAngleLoc); |
| 5248 | if (T.isInvalid() || !T.get()) { |
| 5249 | // Recover by dropping this type. |
| 5250 | ScopeType = QualType(); |
| 5251 | } else |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5252 | ScopeType = GetTypeFromParser(T.get(), &ScopeTypeInfo); |
Douglas Gregor | 7754908 | 2010-02-24 21:29:12 +0000 | [diff] [blame] | 5253 | } |
| 5254 | } |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5255 | |
Douglas Gregor | b4a418f | 2010-02-24 23:02:30 +0000 | [diff] [blame] | 5256 | if (!ScopeType.isNull() && !ScopeTypeInfo) |
| 5257 | ScopeTypeInfo = Context.getTrivialTypeSourceInfo(ScopeType, |
| 5258 | FirstTypeName.StartLocation); |
| 5259 | |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5260 | |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 5261 | return BuildPseudoDestructorExpr(Base, OpLoc, OpKind, SS, |
Douglas Gregor | fce46ee | 2010-02-24 23:50:37 +0000 | [diff] [blame] | 5262 | ScopeTypeInfo, CCLoc, TildeLoc, |
Douglas Gregor | a2e7dd2 | 2010-02-25 01:56:36 +0000 | [diff] [blame] | 5263 | Destructed, HasTrailingLParen); |
Douglas Gregor | d4dca08 | 2010-02-24 18:44:31 +0000 | [diff] [blame] | 5264 | } |
| 5265 | |
David Blaikie | 91ec789 | 2011-12-16 16:03:09 +0000 | [diff] [blame] | 5266 | ExprResult Sema::ActOnPseudoDestructorExpr(Scope *S, Expr *Base, |
| 5267 | SourceLocation OpLoc, |
| 5268 | tok::TokenKind OpKind, |
| 5269 | SourceLocation TildeLoc, |
| 5270 | const DeclSpec& DS, |
| 5271 | bool HasTrailingLParen) { |
Eli Friedman | 8c9fe20 | 2012-01-25 04:35:06 +0000 | [diff] [blame] | 5272 | QualType ObjectType; |
David Blaikie | 91ec789 | 2011-12-16 16:03:09 +0000 | [diff] [blame] | 5273 | if (CheckArrow(*this, ObjectType, Base, OpKind, OpLoc)) |
| 5274 | return ExprError(); |
| 5275 | |
| 5276 | QualType T = BuildDecltypeType(DS.getRepAsExpr(), DS.getTypeSpecTypeLoc()); |
| 5277 | |
| 5278 | TypeLocBuilder TLB; |
| 5279 | DecltypeTypeLoc DecltypeTL = TLB.push<DecltypeTypeLoc>(T); |
| 5280 | DecltypeTL.setNameLoc(DS.getTypeSpecTypeLoc()); |
| 5281 | TypeSourceInfo *DestructedTypeInfo = TLB.getTypeSourceInfo(Context, T); |
| 5282 | PseudoDestructorTypeStorage Destructed(DestructedTypeInfo); |
| 5283 | |
| 5284 | return BuildPseudoDestructorExpr(Base, OpLoc, OpKind, CXXScopeSpec(), |
| 5285 | 0, SourceLocation(), TildeLoc, |
| 5286 | Destructed, HasTrailingLParen); |
| 5287 | } |
| 5288 | |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 5289 | ExprResult Sema::BuildCXXMemberCallExpr(Expr *E, NamedDecl *FoundDecl, |
Eli Friedman | 3f01c8a | 2012-03-01 01:30:04 +0000 | [diff] [blame] | 5290 | CXXConversionDecl *Method, |
Abramo Bagnara | 7cc58b4 | 2011-10-05 07:56:41 +0000 | [diff] [blame] | 5291 | bool HadMultipleCandidates) { |
Eli Friedman | 23f0267 | 2012-03-01 04:01:32 +0000 | [diff] [blame] | 5292 | if (Method->getParent()->isLambda() && |
| 5293 | Method->getConversionType()->isBlockPointerType()) { |
| 5294 | // This is a lambda coversion to block pointer; check if the argument |
| 5295 | // is a LambdaExpr. |
| 5296 | Expr *SubE = E; |
| 5297 | CastExpr *CE = dyn_cast<CastExpr>(SubE); |
| 5298 | if (CE && CE->getCastKind() == CK_NoOp) |
| 5299 | SubE = CE->getSubExpr(); |
| 5300 | SubE = SubE->IgnoreParens(); |
| 5301 | if (CXXBindTemporaryExpr *BE = dyn_cast<CXXBindTemporaryExpr>(SubE)) |
| 5302 | SubE = BE->getSubExpr(); |
| 5303 | if (isa<LambdaExpr>(SubE)) { |
| 5304 | // For the conversion to block pointer on a lambda expression, we |
| 5305 | // construct a special BlockLiteral instead; this doesn't really make |
| 5306 | // a difference in ARC, but outside of ARC the resulting block literal |
| 5307 | // follows the normal lifetime rules for block literals instead of being |
| 5308 | // autoreleased. |
| 5309 | DiagnosticErrorTrap Trap(Diags); |
| 5310 | ExprResult Exp = BuildBlockForLambdaConversion(E->getExprLoc(), |
| 5311 | E->getExprLoc(), |
| 5312 | Method, E); |
| 5313 | if (Exp.isInvalid()) |
| 5314 | Diag(E->getExprLoc(), diag::note_lambda_to_block_conv); |
| 5315 | return Exp; |
| 5316 | } |
| 5317 | } |
| 5318 | |
| 5319 | |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 5320 | ExprResult Exp = PerformObjectArgumentInitialization(E, /*Qualifier=*/0, |
| 5321 | FoundDecl, Method); |
| 5322 | if (Exp.isInvalid()) |
Douglas Gregor | f2ae526 | 2011-01-20 00:18:04 +0000 | [diff] [blame] | 5323 | return true; |
Eli Friedman | 772fffa | 2009-12-09 04:53:56 +0000 | [diff] [blame] | 5324 | |
NAKAMURA Takumi | dfbb02a | 2011-01-27 07:10:08 +0000 | [diff] [blame] | 5325 | MemberExpr *ME = |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 5326 | new (Context) MemberExpr(Exp.take(), /*IsArrow=*/false, Method, |
Abramo Bagnara | 960809e | 2011-11-16 22:46:05 +0000 | [diff] [blame] | 5327 | SourceLocation(), Context.BoundMemberTy, |
John McCall | f89e55a | 2010-11-18 06:31:45 +0000 | [diff] [blame] | 5328 | VK_RValue, OK_Ordinary); |
Abramo Bagnara | 7cc58b4 | 2011-10-05 07:56:41 +0000 | [diff] [blame] | 5329 | if (HadMultipleCandidates) |
| 5330 | ME->setHadMultipleCandidates(true); |
| 5331 | |
John McCall | f89e55a | 2010-11-18 06:31:45 +0000 | [diff] [blame] | 5332 | QualType ResultType = Method->getResultType(); |
| 5333 | ExprValueKind VK = Expr::getValueKindForType(ResultType); |
| 5334 | ResultType = ResultType.getNonLValueExprType(Context); |
| 5335 | |
Eli Friedman | 5f2987c | 2012-02-02 03:46:19 +0000 | [diff] [blame] | 5336 | MarkFunctionReferenced(Exp.get()->getLocStart(), Method); |
Douglas Gregor | 7edfb69 | 2009-11-23 12:27:39 +0000 | [diff] [blame] | 5337 | CXXMemberCallExpr *CE = |
Benjamin Kramer | 3b6bef9 | 2012-08-24 11:54:20 +0000 | [diff] [blame] | 5338 | new (Context) CXXMemberCallExpr(Context, ME, MultiExprArg(), ResultType, VK, |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 5339 | Exp.get()->getLocEnd()); |
Fariborz Jahanian | b740023 | 2009-09-28 23:23:40 +0000 | [diff] [blame] | 5340 | return CE; |
| 5341 | } |
| 5342 | |
Sebastian Redl | 2e15622 | 2010-09-10 20:55:43 +0000 | [diff] [blame] | 5343 | ExprResult Sema::BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, |
| 5344 | SourceLocation RParen) { |
Richard Smith | e6975e9 | 2012-04-17 00:58:00 +0000 | [diff] [blame] | 5345 | CanThrowResult CanThrow = canThrow(Operand); |
Sebastian Redl | 2e15622 | 2010-09-10 20:55:43 +0000 | [diff] [blame] | 5346 | return Owned(new (Context) CXXNoexceptExpr(Context.BoolTy, Operand, |
Richard Smith | e6975e9 | 2012-04-17 00:58:00 +0000 | [diff] [blame] | 5347 | CanThrow, KeyLoc, RParen)); |
Sebastian Redl | 2e15622 | 2010-09-10 20:55:43 +0000 | [diff] [blame] | 5348 | } |
| 5349 | |
| 5350 | ExprResult Sema::ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation, |
| 5351 | Expr *Operand, SourceLocation RParen) { |
| 5352 | return BuildCXXNoexceptExpr(KeyLoc, Operand, RParen); |
Sebastian Redl | 02bc21a | 2010-09-10 20:55:37 +0000 | [diff] [blame] | 5353 | } |
| 5354 | |
Eli Friedman | e26073c | 2012-05-24 22:04:19 +0000 | [diff] [blame] | 5355 | static bool IsSpecialDiscardedValue(Expr *E) { |
| 5356 | // In C++11, discarded-value expressions of a certain form are special, |
| 5357 | // according to [expr]p10: |
| 5358 | // The lvalue-to-rvalue conversion (4.1) is applied only if the |
| 5359 | // expression is an lvalue of volatile-qualified type and it has |
| 5360 | // one of the following forms: |
| 5361 | E = E->IgnoreParens(); |
| 5362 | |
Eli Friedman | 0218068 | 2012-05-24 22:36:31 +0000 | [diff] [blame] | 5363 | // - id-expression (5.1.1), |
Eli Friedman | e26073c | 2012-05-24 22:04:19 +0000 | [diff] [blame] | 5364 | if (isa<DeclRefExpr>(E)) |
| 5365 | return true; |
| 5366 | |
Eli Friedman | 0218068 | 2012-05-24 22:36:31 +0000 | [diff] [blame] | 5367 | // - subscripting (5.2.1), |
Eli Friedman | e26073c | 2012-05-24 22:04:19 +0000 | [diff] [blame] | 5368 | if (isa<ArraySubscriptExpr>(E)) |
| 5369 | return true; |
| 5370 | |
Eli Friedman | 0218068 | 2012-05-24 22:36:31 +0000 | [diff] [blame] | 5371 | // - class member access (5.2.5), |
Eli Friedman | e26073c | 2012-05-24 22:04:19 +0000 | [diff] [blame] | 5372 | if (isa<MemberExpr>(E)) |
| 5373 | return true; |
| 5374 | |
Eli Friedman | 0218068 | 2012-05-24 22:36:31 +0000 | [diff] [blame] | 5375 | // - indirection (5.3.1), |
Eli Friedman | e26073c | 2012-05-24 22:04:19 +0000 | [diff] [blame] | 5376 | if (UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) |
| 5377 | if (UO->getOpcode() == UO_Deref) |
| 5378 | return true; |
| 5379 | |
| 5380 | if (BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) { |
Eli Friedman | 0218068 | 2012-05-24 22:36:31 +0000 | [diff] [blame] | 5381 | // - pointer-to-member operation (5.5), |
Eli Friedman | e26073c | 2012-05-24 22:04:19 +0000 | [diff] [blame] | 5382 | if (BO->isPtrMemOp()) |
| 5383 | return true; |
| 5384 | |
Eli Friedman | 0218068 | 2012-05-24 22:36:31 +0000 | [diff] [blame] | 5385 | // - comma expression (5.18) where the right operand is one of the above. |
Eli Friedman | e26073c | 2012-05-24 22:04:19 +0000 | [diff] [blame] | 5386 | if (BO->getOpcode() == BO_Comma) |
| 5387 | return IsSpecialDiscardedValue(BO->getRHS()); |
| 5388 | } |
| 5389 | |
Eli Friedman | 0218068 | 2012-05-24 22:36:31 +0000 | [diff] [blame] | 5390 | // - conditional expression (5.16) where both the second and the third |
Eli Friedman | e26073c | 2012-05-24 22:04:19 +0000 | [diff] [blame] | 5391 | // operands are one of the above, or |
| 5392 | if (ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E)) |
| 5393 | return IsSpecialDiscardedValue(CO->getTrueExpr()) && |
| 5394 | IsSpecialDiscardedValue(CO->getFalseExpr()); |
| 5395 | // The related edge case of "*x ?: *x". |
| 5396 | if (BinaryConditionalOperator *BCO = |
| 5397 | dyn_cast<BinaryConditionalOperator>(E)) { |
| 5398 | if (OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(BCO->getTrueExpr())) |
| 5399 | return IsSpecialDiscardedValue(OVE->getSourceExpr()) && |
| 5400 | IsSpecialDiscardedValue(BCO->getFalseExpr()); |
| 5401 | } |
| 5402 | |
| 5403 | // Objective-C++ extensions to the rule. |
| 5404 | if (isa<PseudoObjectExpr>(E) || isa<ObjCIvarRefExpr>(E)) |
| 5405 | return true; |
| 5406 | |
| 5407 | return false; |
| 5408 | } |
| 5409 | |
John McCall | f6a1648 | 2010-12-04 03:47:34 +0000 | [diff] [blame] | 5410 | /// Perform the conversions required for an expression used in a |
| 5411 | /// context that ignores the result. |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 5412 | ExprResult Sema::IgnoredValueConversions(Expr *E) { |
John McCall | 3c3b7f9 | 2011-10-25 17:37:35 +0000 | [diff] [blame] | 5413 | if (E->hasPlaceholderType()) { |
| 5414 | ExprResult result = CheckPlaceholderExpr(E); |
| 5415 | if (result.isInvalid()) return Owned(E); |
| 5416 | E = result.take(); |
| 5417 | } |
| 5418 | |
John McCall | a878cda | 2010-12-02 02:07:15 +0000 | [diff] [blame] | 5419 | // C99 6.3.2.1: |
| 5420 | // [Except in specific positions,] an lvalue that does not have |
| 5421 | // array type is converted to the value stored in the |
| 5422 | // designated object (and is no longer an lvalue). |
John McCall | e6d134b | 2011-06-27 21:24:11 +0000 | [diff] [blame] | 5423 | if (E->isRValue()) { |
| 5424 | // In C, function designators (i.e. expressions of function type) |
| 5425 | // are r-values, but we still want to do function-to-pointer decay |
| 5426 | // on them. This is both technically correct and convenient for |
| 5427 | // some clients. |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 5428 | if (!getLangOpts().CPlusPlus && E->getType()->isFunctionType()) |
John McCall | e6d134b | 2011-06-27 21:24:11 +0000 | [diff] [blame] | 5429 | return DefaultFunctionArrayConversion(E); |
| 5430 | |
| 5431 | return Owned(E); |
| 5432 | } |
John McCall | a878cda | 2010-12-02 02:07:15 +0000 | [diff] [blame] | 5433 | |
Eli Friedman | e26073c | 2012-05-24 22:04:19 +0000 | [diff] [blame] | 5434 | if (getLangOpts().CPlusPlus) { |
| 5435 | // The C++11 standard defines the notion of a discarded-value expression; |
| 5436 | // normally, we don't need to do anything to handle it, but if it is a |
| 5437 | // volatile lvalue with a special form, we perform an lvalue-to-rvalue |
| 5438 | // conversion. |
| 5439 | if (getLangOpts().CPlusPlus0x && E->isGLValue() && |
| 5440 | E->getType().isVolatileQualified() && |
| 5441 | IsSpecialDiscardedValue(E)) { |
| 5442 | ExprResult Res = DefaultLvalueConversion(E); |
| 5443 | if (Res.isInvalid()) |
| 5444 | return Owned(E); |
| 5445 | E = Res.take(); |
| 5446 | } |
| 5447 | return Owned(E); |
| 5448 | } |
John McCall | f6a1648 | 2010-12-04 03:47:34 +0000 | [diff] [blame] | 5449 | |
| 5450 | // GCC seems to also exclude expressions of incomplete enum type. |
| 5451 | if (const EnumType *T = E->getType()->getAs<EnumType>()) { |
| 5452 | if (!T->getDecl()->isComplete()) { |
| 5453 | // FIXME: stupid workaround for a codegen bug! |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 5454 | E = ImpCastExprToType(E, Context.VoidTy, CK_ToVoid).take(); |
| 5455 | return Owned(E); |
John McCall | f6a1648 | 2010-12-04 03:47:34 +0000 | [diff] [blame] | 5456 | } |
| 5457 | } |
| 5458 | |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 5459 | ExprResult Res = DefaultFunctionArrayLvalueConversion(E); |
| 5460 | if (Res.isInvalid()) |
| 5461 | return Owned(E); |
| 5462 | E = Res.take(); |
| 5463 | |
John McCall | 85515d6 | 2010-12-04 12:29:11 +0000 | [diff] [blame] | 5464 | if (!E->getType()->isVoidType()) |
| 5465 | RequireCompleteType(E->getExprLoc(), E->getType(), |
| 5466 | diag::err_incomplete_type); |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 5467 | return Owned(E); |
John McCall | f6a1648 | 2010-12-04 03:47:34 +0000 | [diff] [blame] | 5468 | } |
| 5469 | |
David Blaikie | def0762 | 2012-05-16 04:20:04 +0000 | [diff] [blame] | 5470 | ExprResult Sema::ActOnFinishFullExpr(Expr *FE, SourceLocation CC) { |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 5471 | ExprResult FullExpr = Owned(FE); |
| 5472 | |
| 5473 | if (!FullExpr.get()) |
Douglas Gregor | bebbe0d | 2010-12-15 01:34:56 +0000 | [diff] [blame] | 5474 | return ExprError(); |
John McCall | f6a1648 | 2010-12-04 03:47:34 +0000 | [diff] [blame] | 5475 | |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 5476 | if (DiagnoseUnexpandedParameterPack(FullExpr.get())) |
Douglas Gregor | d093722 | 2010-12-13 22:49:22 +0000 | [diff] [blame] | 5477 | return ExprError(); |
| 5478 | |
Douglas Gregor | 5e3a8be | 2011-12-15 00:53:32 +0000 | [diff] [blame] | 5479 | // Top-level message sends default to 'id' when we're in a debugger. |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 5480 | if (getLangOpts().DebuggerCastResultToId && |
Douglas Gregor | 5e3a8be | 2011-12-15 00:53:32 +0000 | [diff] [blame] | 5481 | FullExpr.get()->getType() == Context.UnknownAnyTy && |
| 5482 | isa<ObjCMessageExpr>(FullExpr.get())) { |
| 5483 | FullExpr = forceUnknownAnyToType(FullExpr.take(), Context.getObjCIdType()); |
| 5484 | if (FullExpr.isInvalid()) |
| 5485 | return ExprError(); |
| 5486 | } |
| 5487 | |
John McCall | fb8721c | 2011-04-10 19:13:55 +0000 | [diff] [blame] | 5488 | FullExpr = CheckPlaceholderExpr(FullExpr.take()); |
| 5489 | if (FullExpr.isInvalid()) |
| 5490 | return ExprError(); |
Douglas Gregor | 353ee24 | 2011-03-07 02:05:23 +0000 | [diff] [blame] | 5491 | |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 5492 | FullExpr = IgnoredValueConversions(FullExpr.take()); |
| 5493 | if (FullExpr.isInvalid()) |
| 5494 | return ExprError(); |
| 5495 | |
David Blaikie | def0762 | 2012-05-16 04:20:04 +0000 | [diff] [blame] | 5496 | CheckImplicitConversions(FullExpr.get(), CC); |
John McCall | 4765fa0 | 2010-12-06 08:20:24 +0000 | [diff] [blame] | 5497 | return MaybeCreateExprWithCleanups(FullExpr); |
Anders Carlsson | 165a0a0 | 2009-05-17 18:41:29 +0000 | [diff] [blame] | 5498 | } |
Argyrios Kyrtzidis | bf8cafa | 2010-11-02 02:33:08 +0000 | [diff] [blame] | 5499 | |
| 5500 | StmtResult Sema::ActOnFinishFullStmt(Stmt *FullStmt) { |
| 5501 | if (!FullStmt) return StmtError(); |
| 5502 | |
John McCall | 4765fa0 | 2010-12-06 08:20:24 +0000 | [diff] [blame] | 5503 | return MaybeCreateStmtWithCleanups(FullStmt); |
Argyrios Kyrtzidis | bf8cafa | 2010-11-02 02:33:08 +0000 | [diff] [blame] | 5504 | } |
Francois Pichet | 1e86269 | 2011-05-06 20:48:22 +0000 | [diff] [blame] | 5505 | |
Douglas Gregor | ba0513d | 2011-10-25 01:33:02 +0000 | [diff] [blame] | 5506 | Sema::IfExistsResult |
| 5507 | Sema::CheckMicrosoftIfExistsSymbol(Scope *S, |
| 5508 | CXXScopeSpec &SS, |
| 5509 | const DeclarationNameInfo &TargetNameInfo) { |
Francois Pichet | 1e86269 | 2011-05-06 20:48:22 +0000 | [diff] [blame] | 5510 | DeclarationName TargetName = TargetNameInfo.getName(); |
| 5511 | if (!TargetName) |
Douglas Gregor | 3896fc5 | 2011-10-24 22:31:10 +0000 | [diff] [blame] | 5512 | return IER_DoesNotExist; |
Douglas Gregor | ba0513d | 2011-10-25 01:33:02 +0000 | [diff] [blame] | 5513 | |
Douglas Gregor | 3896fc5 | 2011-10-24 22:31:10 +0000 | [diff] [blame] | 5514 | // If the name itself is dependent, then the result is dependent. |
| 5515 | if (TargetName.isDependentName()) |
| 5516 | return IER_Dependent; |
Douglas Gregor | ba0513d | 2011-10-25 01:33:02 +0000 | [diff] [blame] | 5517 | |
Francois Pichet | 1e86269 | 2011-05-06 20:48:22 +0000 | [diff] [blame] | 5518 | // Do the redeclaration lookup in the current scope. |
| 5519 | LookupResult R(*this, TargetNameInfo, Sema::LookupAnyName, |
| 5520 | Sema::NotForRedeclaration); |
Douglas Gregor | 3896fc5 | 2011-10-24 22:31:10 +0000 | [diff] [blame] | 5521 | LookupParsedName(R, S, &SS); |
Francois Pichet | 1e86269 | 2011-05-06 20:48:22 +0000 | [diff] [blame] | 5522 | R.suppressDiagnostics(); |
Douglas Gregor | 3896fc5 | 2011-10-24 22:31:10 +0000 | [diff] [blame] | 5523 | |
| 5524 | switch (R.getResultKind()) { |
| 5525 | case LookupResult::Found: |
| 5526 | case LookupResult::FoundOverloaded: |
| 5527 | case LookupResult::FoundUnresolvedValue: |
| 5528 | case LookupResult::Ambiguous: |
| 5529 | return IER_Exists; |
| 5530 | |
| 5531 | case LookupResult::NotFound: |
| 5532 | return IER_DoesNotExist; |
| 5533 | |
| 5534 | case LookupResult::NotFoundInCurrentInstantiation: |
| 5535 | return IER_Dependent; |
| 5536 | } |
David Blaikie | 7530c03 | 2012-01-17 06:56:22 +0000 | [diff] [blame] | 5537 | |
| 5538 | llvm_unreachable("Invalid LookupResult Kind!"); |
Francois Pichet | 1e86269 | 2011-05-06 20:48:22 +0000 | [diff] [blame] | 5539 | } |
Douglas Gregor | ba0513d | 2011-10-25 01:33:02 +0000 | [diff] [blame] | 5540 | |
Douglas Gregor | 65019ac | 2011-10-25 03:44:56 +0000 | [diff] [blame] | 5541 | Sema::IfExistsResult |
| 5542 | Sema::CheckMicrosoftIfExistsSymbol(Scope *S, SourceLocation KeywordLoc, |
| 5543 | bool IsIfExists, CXXScopeSpec &SS, |
| 5544 | UnqualifiedId &Name) { |
Douglas Gregor | ba0513d | 2011-10-25 01:33:02 +0000 | [diff] [blame] | 5545 | DeclarationNameInfo TargetNameInfo = GetNameFromUnqualifiedId(Name); |
Douglas Gregor | 65019ac | 2011-10-25 03:44:56 +0000 | [diff] [blame] | 5546 | |
| 5547 | // Check for unexpanded parameter packs. |
| 5548 | SmallVector<UnexpandedParameterPack, 4> Unexpanded; |
| 5549 | collectUnexpandedParameterPacks(SS, Unexpanded); |
| 5550 | collectUnexpandedParameterPacks(TargetNameInfo, Unexpanded); |
| 5551 | if (!Unexpanded.empty()) { |
| 5552 | DiagnoseUnexpandedParameterPacks(KeywordLoc, |
| 5553 | IsIfExists? UPPC_IfExists |
| 5554 | : UPPC_IfNotExists, |
| 5555 | Unexpanded); |
| 5556 | return IER_Error; |
| 5557 | } |
| 5558 | |
Douglas Gregor | ba0513d | 2011-10-25 01:33:02 +0000 | [diff] [blame] | 5559 | return CheckMicrosoftIfExistsSymbol(S, SS, TargetNameInfo); |
| 5560 | } |