Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1 | //===--- Sema.cpp - AST Builder and Semantic Analysis Implementation ------===// |
| 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 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This file implements the actions class which performs semantic analysis and |
| 11 | // builds an AST out of a parse stream. |
| 12 | // |
| 13 | //===----------------------------------------------------------------------===// |
| 14 | |
John McCall | 9c3087b | 2010-08-26 02:13:20 +0000 | [diff] [blame] | 15 | #include "clang/Sema/SemaInternal.h" |
| 16 | #include "clang/Sema/DelayedDiagnostic.h" |
Anton Korobeynikov | 82d0a41 | 2010-01-10 12:58:08 +0000 | [diff] [blame] | 17 | #include "TargetAttributesSema.h" |
Ryan Flynn | e25ff83 | 2009-07-30 03:15:39 +0000 | [diff] [blame] | 18 | #include "llvm/ADT/DenseMap.h" |
Sebastian Redl | e9d12b6 | 2010-01-31 22:27:38 +0000 | [diff] [blame] | 19 | #include "llvm/ADT/SmallSet.h" |
John McCall | 680523a | 2009-11-07 03:30:10 +0000 | [diff] [blame] | 20 | #include "llvm/ADT/APFloat.h" |
John McCall | 9257664 | 2012-05-07 06:16:41 +0000 | [diff] [blame] | 21 | #include "llvm/Support/CrashRecoveryContext.h" |
John McCall | 5f1e094 | 2010-08-24 08:50:51 +0000 | [diff] [blame] | 22 | #include "clang/Sema/CXXFieldCollector.h" |
Douglas Gregor | 9b62363 | 2010-10-12 23:32:35 +0000 | [diff] [blame] | 23 | #include "clang/Sema/TemplateDeduction.h" |
John McCall | 76bd1f3 | 2010-06-01 09:23:16 +0000 | [diff] [blame] | 24 | #include "clang/Sema/ExternalSemaSource.h" |
Sebastian Redl | 8c84571 | 2010-09-28 20:23:00 +0000 | [diff] [blame] | 25 | #include "clang/Sema/ObjCMethodList.h" |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 26 | #include "clang/Sema/PrettyDeclStackTrace.h" |
John McCall | 5f1e094 | 2010-08-24 08:50:51 +0000 | [diff] [blame] | 27 | #include "clang/Sema/Scope.h" |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 28 | #include "clang/Sema/ScopeInfo.h" |
Douglas Gregor | 46ea32a | 2010-08-12 22:51:45 +0000 | [diff] [blame] | 29 | #include "clang/Sema/SemaConsumer.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 30 | #include "clang/AST/ASTContext.h" |
Douglas Gregor | 79a9a34 | 2010-02-09 22:26:47 +0000 | [diff] [blame] | 31 | #include "clang/AST/ASTDiagnostic.h" |
John McCall | 384aff8 | 2010-08-25 07:42:41 +0000 | [diff] [blame] | 32 | #include "clang/AST/DeclCXX.h" |
Daniel Jasper | f8cc02e | 2012-06-06 08:32:04 +0000 | [diff] [blame] | 33 | #include "clang/AST/DeclFriend.h" |
Daniel Dunbar | c4a1dea | 2008-08-11 05:35:13 +0000 | [diff] [blame] | 34 | #include "clang/AST/DeclObjC.h" |
Daniel Dunbar | e91593e | 2008-08-11 04:54:23 +0000 | [diff] [blame] | 35 | #include "clang/AST/Expr.h" |
Matt Beaumont-Gay | c9366ba | 2011-05-04 22:10:40 +0000 | [diff] [blame] | 36 | #include "clang/AST/ExprCXX.h" |
Chris Lattner | ad8dcf4 | 2011-02-17 07:39:24 +0000 | [diff] [blame] | 37 | #include "clang/AST/StmtCXX.h" |
Douglas Gregor | 90db260 | 2011-12-02 01:47:07 +0000 | [diff] [blame] | 38 | #include "clang/Lex/HeaderSearch.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 39 | #include "clang/Lex/Preprocessor.h" |
Douglas Gregor | f7572a6 | 2011-09-20 18:13:03 +0000 | [diff] [blame] | 40 | #include "clang/Basic/FileManager.h" |
Anders Carlsson | 91a0cc9 | 2009-08-26 22:33:56 +0000 | [diff] [blame] | 41 | #include "clang/Basic/PartialDiagnostic.h" |
Chris Lattner | 4d150c8 | 2009-04-30 06:18:40 +0000 | [diff] [blame] | 42 | #include "clang/Basic/TargetInfo.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 43 | using namespace clang; |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 44 | using namespace sema; |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 45 | |
| 46 | FunctionScopeInfo::~FunctionScopeInfo() { } |
| 47 | |
Argyrios Kyrtzidis | 8fc32d2 | 2010-11-19 00:19:15 +0000 | [diff] [blame] | 48 | void FunctionScopeInfo::Clear() { |
John McCall | b60a77e | 2010-08-01 00:26:45 +0000 | [diff] [blame] | 49 | HasBranchProtectedScope = false; |
| 50 | HasBranchIntoScope = false; |
| 51 | HasIndirectGoto = false; |
| 52 | |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 53 | SwitchStack.clear(); |
Douglas Gregor | 5077c38 | 2010-05-15 06:01:05 +0000 | [diff] [blame] | 54 | Returns.clear(); |
Argyrios Kyrtzidis | 8fc32d2 | 2010-11-19 00:19:15 +0000 | [diff] [blame] | 55 | ErrorTrap.reset(); |
Ted Kremenek | 351ba91 | 2011-02-23 01:52:04 +0000 | [diff] [blame] | 56 | PossiblyUnreachableDiags.clear(); |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 57 | } |
| 58 | |
| 59 | BlockScopeInfo::~BlockScopeInfo() { } |
Eli Friedman | ec9ea72 | 2012-01-05 03:35:19 +0000 | [diff] [blame] | 60 | LambdaScopeInfo::~LambdaScopeInfo() { } |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 61 | |
Argyrios Kyrtzidis | ea8c59a | 2012-01-17 02:15:51 +0000 | [diff] [blame] | 62 | PrintingPolicy Sema::getPrintingPolicy(const ASTContext &Context, |
| 63 | const Preprocessor &PP) { |
Douglas Gregor | 8987b23 | 2011-09-27 23:30:47 +0000 | [diff] [blame] | 64 | PrintingPolicy Policy = Context.getPrintingPolicy(); |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 65 | Policy.Bool = Context.getLangOpts().Bool; |
Douglas Gregor | 8987b23 | 2011-09-27 23:30:47 +0000 | [diff] [blame] | 66 | if (!Policy.Bool) { |
| 67 | if (MacroInfo *BoolMacro = PP.getMacroInfo(&Context.Idents.get("bool"))) { |
| 68 | Policy.Bool = BoolMacro->isObjectLike() && |
| 69 | BoolMacro->getNumTokens() == 1 && |
| 70 | BoolMacro->getReplacementToken(0).is(tok::kw__Bool); |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | return Policy; |
| 75 | } |
| 76 | |
Douglas Gregor | c1a3e5e | 2010-08-25 18:07:12 +0000 | [diff] [blame] | 77 | void Sema::ActOnTranslationUnitScope(Scope *S) { |
Steve Naroff | b216c88 | 2007-10-09 22:01:59 +0000 | [diff] [blame] | 78 | TUScope = S; |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 79 | PushDeclContext(S, Context.getTranslationUnitDecl()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 80 | |
John McCall | c7e04da | 2010-05-28 18:45:08 +0000 | [diff] [blame] | 81 | VAListTagName = PP.getIdentifierInfo("__va_list_tag"); |
Steve Naroff | 3b95017 | 2007-10-10 21:53:07 +0000 | [diff] [blame] | 82 | } |
| 83 | |
Douglas Gregor | f807fe0 | 2009-04-14 16:27:31 +0000 | [diff] [blame] | 84 | Sema::Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, |
Douglas Gregor | 467dc88 | 2011-08-25 22:30:56 +0000 | [diff] [blame] | 85 | TranslationUnitKind TUKind, |
Daniel Dunbar | 3a2838d | 2009-11-13 08:58:20 +0000 | [diff] [blame] | 86 | CodeCompleteConsumer *CodeCompleter) |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 87 | : TheTargetAttributesSema(0), FPFeatures(pp.getLangOpts()), |
| 88 | LangOpts(pp.getLangOpts()), PP(pp), Context(ctxt), Consumer(consumer), |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 89 | Diags(PP.getDiagnostics()), SourceMgr(PP.getSourceManager()), |
Chandler Carruth | 5d98994 | 2011-07-06 16:21:37 +0000 | [diff] [blame] | 90 | CollectStats(false), ExternalSource(0), CodeCompleter(CodeCompleter), |
Argyrios Kyrtzidis | 3a38744 | 2011-10-06 23:23:20 +0000 | [diff] [blame] | 91 | CurContext(0), OriginalLexicalContext(0), |
| 92 | PackContext(0), MSStructPragmaOn(false), VisContext(0), |
John McCall | 80ee6e8 | 2011-11-10 05:35:25 +0000 | [diff] [blame] | 93 | ExprNeedsCleanups(false), LateTemplateParser(0), OpaqueParser(0), |
Sebastian Redl | 395e04d | 2012-01-17 22:49:33 +0000 | [diff] [blame] | 94 | IdResolver(pp), StdInitializerList(0), CXXTypeInfoDecl(0), MSVCGuidDecl(0), |
Benjamin Kramer | 471131a | 2012-04-22 20:43:35 +0000 | [diff] [blame] | 95 | NSNumberDecl(0), |
| 96 | NSStringDecl(0), StringWithUTF8StringMethod(0), |
| 97 | NSArrayDecl(0), ArrayWithObjectsMethod(0), |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 98 | NSDictionaryDecl(0), DictionaryWithObjectsMethod(0), |
Bill Wendling | b7566d8 | 2010-09-08 21:30:16 +0000 | [diff] [blame] | 99 | GlobalNewDeleteDeclared(false), |
Douglas Gregor | 467dc88 | 2011-08-25 22:30:56 +0000 | [diff] [blame] | 100 | TUKind(TUKind), |
John McCall | 1348967 | 2012-05-07 06:16:58 +0000 | [diff] [blame] | 101 | NumSFINAEErrors(0), InFunctionDeclarator(0), |
Douglas Gregor | 1eee5dc | 2011-01-27 22:31:44 +0000 | [diff] [blame] | 102 | AccessCheckingSFINAE(false), InNonInstantiationSFINAEContext(false), |
Douglas Gregor | 8491ffe | 2010-12-20 22:05:00 +0000 | [diff] [blame] | 103 | NonInstantiationEntries(0), ArgumentPackSubstitutionIndex(-1), |
| 104 | CurrentInstantiationScope(0), TyposCorrected(0), |
Bill Wendling | b7566d8 | 2010-09-08 21:30:16 +0000 | [diff] [blame] | 105 | AnalysisWarnings(*this) |
Douglas Gregor | f35f828 | 2009-11-11 21:54:23 +0000 | [diff] [blame] | 106 | { |
Steve Naroff | 3b95017 | 2007-10-10 21:53:07 +0000 | [diff] [blame] | 107 | TUScope = 0; |
Douglas Gregor | cefc3af | 2012-04-16 07:05:22 +0000 | [diff] [blame] | 108 | |
Douglas Gregor | d8bba9c | 2011-06-28 16:20:02 +0000 | [diff] [blame] | 109 | LoadedExternalKnownNamespaces = false; |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 110 | for (unsigned I = 0; I != NSAPI::NumNSNumberLiteralMethods; ++I) |
| 111 | NSNumberLiteralMethods[I] = 0; |
| 112 | |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 113 | if (getLangOpts().ObjC1) |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 114 | NSAPIObj.reset(new NSAPI(Context)); |
| 115 | |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 116 | if (getLangOpts().CPlusPlus) |
Argyrios Kyrtzidis | 0795232 | 2008-07-01 10:37:29 +0000 | [diff] [blame] | 117 | FieldCollector.reset(new CXXFieldCollector()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 118 | |
Chris Lattner | 22caddc | 2008-11-23 09:13:29 +0000 | [diff] [blame] | 119 | // Tell diagnostics how to render things from the AST library. |
Douglas Gregor | 79a9a34 | 2010-02-09 22:26:47 +0000 | [diff] [blame] | 120 | PP.getDiagnostics().SetArgToStringFn(&FormatASTNodeDiagnosticArgument, |
| 121 | &Context); |
Douglas Gregor | 2afce72 | 2009-11-26 00:44:06 +0000 | [diff] [blame] | 122 | |
| 123 | ExprEvalContexts.push_back( |
Richard Smith | 76f3f69 | 2012-02-22 02:04:18 +0000 | [diff] [blame] | 124 | ExpressionEvaluationContextRecord(PotentiallyEvaluated, 0, |
| 125 | false, 0, false)); |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 126 | |
Argyrios Kyrtzidis | 8fc32d2 | 2010-11-19 00:19:15 +0000 | [diff] [blame] | 127 | FunctionScopes.push_back(new FunctionScopeInfo(Diags)); |
Douglas Gregor | 46ea32a | 2010-08-12 22:51:45 +0000 | [diff] [blame] | 128 | } |
| 129 | |
| 130 | void Sema::Initialize() { |
| 131 | // Tell the AST consumer about this Sema object. |
| 132 | Consumer.Initialize(Context); |
| 133 | |
| 134 | // FIXME: Isn't this redundant with the initialization above? |
| 135 | if (SemaConsumer *SC = dyn_cast<SemaConsumer>(&Consumer)) |
| 136 | SC->InitializeSema(*this); |
| 137 | |
| 138 | // Tell the external Sema source about this Sema object. |
| 139 | if (ExternalSemaSource *ExternalSema |
| 140 | = dyn_cast_or_null<ExternalSemaSource>(Context.getExternalSource())) |
| 141 | ExternalSema->InitializeSema(*this); |
Douglas Gregor | 4dfd02a | 2011-08-12 05:46:01 +0000 | [diff] [blame] | 142 | |
Douglas Gregor | 772eeae | 2011-08-12 06:49:56 +0000 | [diff] [blame] | 143 | // Initialize predefined 128-bit integer types, if needed. |
| 144 | if (PP.getTargetInfo().getPointerWidth(0) >= 64) { |
| 145 | // If either of the 128-bit integer types are unavailable to name lookup, |
| 146 | // define them now. |
| 147 | DeclarationName Int128 = &Context.Idents.get("__int128_t"); |
Douglas Gregor | eee242f | 2011-10-27 09:33:13 +0000 | [diff] [blame] | 148 | if (IdResolver.begin(Int128) == IdResolver.end()) |
Douglas Gregor | 772eeae | 2011-08-12 06:49:56 +0000 | [diff] [blame] | 149 | PushOnScopeChains(Context.getInt128Decl(), TUScope); |
| 150 | |
| 151 | DeclarationName UInt128 = &Context.Idents.get("__uint128_t"); |
Douglas Gregor | eee242f | 2011-10-27 09:33:13 +0000 | [diff] [blame] | 152 | if (IdResolver.begin(UInt128) == IdResolver.end()) |
Douglas Gregor | 772eeae | 2011-08-12 06:49:56 +0000 | [diff] [blame] | 153 | PushOnScopeChains(Context.getUInt128Decl(), TUScope); |
| 154 | } |
| 155 | |
| 156 | |
Douglas Gregor | 4dfd02a | 2011-08-12 05:46:01 +0000 | [diff] [blame] | 157 | // Initialize predefined Objective-C types: |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 158 | if (PP.getLangOpts().ObjC1) { |
Douglas Gregor | 7a27ea5 | 2011-08-12 06:17:30 +0000 | [diff] [blame] | 159 | // If 'SEL' does not yet refer to any declarations, make it refer to the |
| 160 | // predefined 'SEL'. |
| 161 | DeclarationName SEL = &Context.Idents.get("SEL"); |
Douglas Gregor | eee242f | 2011-10-27 09:33:13 +0000 | [diff] [blame] | 162 | if (IdResolver.begin(SEL) == IdResolver.end()) |
Douglas Gregor | 7a27ea5 | 2011-08-12 06:17:30 +0000 | [diff] [blame] | 163 | PushOnScopeChains(Context.getObjCSelDecl(), TUScope); |
| 164 | |
Douglas Gregor | 4dfd02a | 2011-08-12 05:46:01 +0000 | [diff] [blame] | 165 | // If 'id' does not yet refer to any declarations, make it refer to the |
| 166 | // predefined 'id'. |
| 167 | DeclarationName Id = &Context.Idents.get("id"); |
Douglas Gregor | eee242f | 2011-10-27 09:33:13 +0000 | [diff] [blame] | 168 | if (IdResolver.begin(Id) == IdResolver.end()) |
Douglas Gregor | 4dfd02a | 2011-08-12 05:46:01 +0000 | [diff] [blame] | 169 | PushOnScopeChains(Context.getObjCIdDecl(), TUScope); |
Douglas Gregor | 79d6726 | 2011-08-12 05:59:41 +0000 | [diff] [blame] | 170 | |
| 171 | // Create the built-in typedef for 'Class'. |
| 172 | DeclarationName Class = &Context.Idents.get("Class"); |
Douglas Gregor | eee242f | 2011-10-27 09:33:13 +0000 | [diff] [blame] | 173 | if (IdResolver.begin(Class) == IdResolver.end()) |
Douglas Gregor | 79d6726 | 2011-08-12 05:59:41 +0000 | [diff] [blame] | 174 | PushOnScopeChains(Context.getObjCClassDecl(), TUScope); |
Douglas Gregor | a6ea10e | 2012-01-17 18:09:05 +0000 | [diff] [blame] | 175 | |
| 176 | // Create the built-in forward declaratino for 'Protocol'. |
| 177 | DeclarationName Protocol = &Context.Idents.get("Protocol"); |
| 178 | if (IdResolver.begin(Protocol) == IdResolver.end()) |
| 179 | PushOnScopeChains(Context.getObjCProtocolDecl(), TUScope); |
Douglas Gregor | 4dfd02a | 2011-08-12 05:46:01 +0000 | [diff] [blame] | 180 | } |
Meador Inge | c5613b2 | 2012-06-16 03:34:49 +0000 | [diff] [blame] | 181 | |
| 182 | DeclarationName BuiltinVaList = &Context.Idents.get("__builtin_va_list"); |
| 183 | if (IdResolver.begin(BuiltinVaList) == IdResolver.end()) |
| 184 | PushOnScopeChains(Context.getBuiltinVaListDecl(), TUScope); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 185 | } |
| 186 | |
Anton Korobeynikov | 82d0a41 | 2010-01-10 12:58:08 +0000 | [diff] [blame] | 187 | Sema::~Sema() { |
| 188 | if (PackContext) FreePackedContext(); |
Eli Friedman | aa8b0d1 | 2010-08-05 06:57:20 +0000 | [diff] [blame] | 189 | if (VisContext) FreeVisContext(); |
Anton Korobeynikov | 82d0a41 | 2010-01-10 12:58:08 +0000 | [diff] [blame] | 190 | delete TheTargetAttributesSema; |
Fariborz Jahanian | 62c9258 | 2011-04-25 18:49:15 +0000 | [diff] [blame] | 191 | MSStructPragmaOn = false; |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 192 | // Kill all the active scopes. |
| 193 | for (unsigned I = 1, E = FunctionScopes.size(); I != E; ++I) |
| 194 | delete FunctionScopes[I]; |
| 195 | if (FunctionScopes.size() == 1) |
| 196 | delete FunctionScopes[0]; |
Douglas Gregor | 46ea32a | 2010-08-12 22:51:45 +0000 | [diff] [blame] | 197 | |
| 198 | // Tell the SemaConsumer to forget about us; we're going out of scope. |
| 199 | if (SemaConsumer *SC = dyn_cast<SemaConsumer>(&Consumer)) |
| 200 | SC->ForgetSema(); |
| 201 | |
| 202 | // Detach from the external Sema source. |
| 203 | if (ExternalSemaSource *ExternalSema |
Douglas Gregor | 914ed9d | 2010-08-13 03:15:25 +0000 | [diff] [blame] | 204 | = dyn_cast_or_null<ExternalSemaSource>(Context.getExternalSource())) |
Douglas Gregor | 46ea32a | 2010-08-12 22:51:45 +0000 | [diff] [blame] | 205 | ExternalSema->ForgetSema(); |
Anton Korobeynikov | 82d0a41 | 2010-01-10 12:58:08 +0000 | [diff] [blame] | 206 | } |
| 207 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 208 | /// makeUnavailableInSystemHeader - There is an error in the current |
| 209 | /// context. If we're still in a system header, and we can plausibly |
| 210 | /// make the relevant declaration unavailable instead of erroring, do |
| 211 | /// so and return true. |
| 212 | bool Sema::makeUnavailableInSystemHeader(SourceLocation loc, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 213 | StringRef msg) { |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 214 | // If we're not in a function, it's an error. |
| 215 | FunctionDecl *fn = dyn_cast<FunctionDecl>(CurContext); |
| 216 | if (!fn) return false; |
| 217 | |
| 218 | // If we're in template instantiation, it's an error. |
| 219 | if (!ActiveTemplateInstantiations.empty()) |
| 220 | return false; |
| 221 | |
| 222 | // If that function's not in a system header, it's an error. |
| 223 | if (!Context.getSourceManager().isInSystemHeader(loc)) |
| 224 | return false; |
| 225 | |
| 226 | // If the function is already unavailable, it's not an error. |
| 227 | if (fn->hasAttr<UnavailableAttr>()) return true; |
| 228 | |
| 229 | fn->addAttr(new (Context) UnavailableAttr(loc, Context, msg)); |
| 230 | return true; |
| 231 | } |
| 232 | |
Sebastian Redl | 58a2cd8 | 2011-04-24 16:28:06 +0000 | [diff] [blame] | 233 | ASTMutationListener *Sema::getASTMutationListener() const { |
| 234 | return getASTConsumer().GetASTMutationListener(); |
| 235 | } |
| 236 | |
Chandler Carruth | 5d98994 | 2011-07-06 16:21:37 +0000 | [diff] [blame] | 237 | /// \brief Print out statistics about the semantic analysis. |
| 238 | void Sema::PrintStats() const { |
| 239 | llvm::errs() << "\n*** Semantic Analysis Stats:\n"; |
| 240 | llvm::errs() << NumSFINAEErrors << " SFINAE diagnostics trapped.\n"; |
| 241 | |
| 242 | BumpAlloc.PrintStats(); |
| 243 | AnalysisWarnings.PrintStats(); |
| 244 | } |
| 245 | |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 246 | /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit cast. |
| 247 | /// If there is already an implicit cast, merge into the existing one. |
| 248 | /// The result is of the given category. |
| 249 | ExprResult Sema::ImpCastExprToType(Expr *E, QualType Ty, |
| 250 | CastKind Kind, ExprValueKind VK, |
| 251 | const CXXCastPath *BasePath, |
| 252 | CheckedConversionKind CCK) { |
Richard Smith | 9c129f8 | 2011-10-28 03:31:48 +0000 | [diff] [blame] | 253 | #ifndef NDEBUG |
| 254 | if (VK == VK_RValue && !E->isRValue()) { |
| 255 | switch (Kind) { |
| 256 | default: |
| 257 | assert(0 && "can't implicitly cast lvalue to rvalue with this cast kind"); |
| 258 | case CK_LValueToRValue: |
| 259 | case CK_ArrayToPointerDecay: |
| 260 | case CK_FunctionToPointerDecay: |
| 261 | case CK_ToVoid: |
| 262 | break; |
| 263 | } |
| 264 | } |
Richard Smith | acdfa4d | 2011-11-10 23:32:36 +0000 | [diff] [blame] | 265 | assert((VK == VK_RValue || !E->isRValue()) && "can't cast rvalue to lvalue"); |
Richard Smith | 9c129f8 | 2011-10-28 03:31:48 +0000 | [diff] [blame] | 266 | #endif |
| 267 | |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 268 | QualType ExprTy = Context.getCanonicalType(E->getType()); |
Mon P Wang | 3a2c744 | 2008-09-04 08:38:01 +0000 | [diff] [blame] | 269 | QualType TypeTy = Context.getCanonicalType(Ty); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 270 | |
Mon P Wang | 3a2c744 | 2008-09-04 08:38:01 +0000 | [diff] [blame] | 271 | if (ExprTy == TypeTy) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 272 | return Owned(E); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 273 | |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 274 | if (getLangOpts().ObjCAutoRefCount) |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 275 | CheckObjCARCConversion(SourceRange(), Ty, E, CCK); |
| 276 | |
Douglas Gregor | 6fb745b | 2010-05-13 16:44:06 +0000 | [diff] [blame] | 277 | // If this is a derived-to-base cast to a through a virtual base, we |
| 278 | // need a vtable. |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 279 | if (Kind == CK_DerivedToBase && |
John McCall | f871d0c | 2010-08-07 06:22:56 +0000 | [diff] [blame] | 280 | BasePathInvolvesVirtualBase(*BasePath)) { |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 281 | QualType T = E->getType(); |
Douglas Gregor | 6fb745b | 2010-05-13 16:44:06 +0000 | [diff] [blame] | 282 | if (const PointerType *Pointer = T->getAs<PointerType>()) |
| 283 | T = Pointer->getPointeeType(); |
| 284 | if (const RecordType *RecordTy = T->getAs<RecordType>()) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 285 | MarkVTableUsed(E->getLocStart(), |
Douglas Gregor | 6fb745b | 2010-05-13 16:44:06 +0000 | [diff] [blame] | 286 | cast<CXXRecordDecl>(RecordTy->getDecl())); |
| 287 | } |
Anders Carlsson | 4c5fad3 | 2009-09-15 05:28:24 +0000 | [diff] [blame] | 288 | |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 289 | if (ImplicitCastExpr *ImpCast = dyn_cast<ImplicitCastExpr>(E)) { |
| 290 | if (ImpCast->getCastKind() == Kind && (!BasePath || BasePath->empty())) { |
| 291 | ImpCast->setType(Ty); |
| 292 | ImpCast->setValueKind(VK); |
| 293 | return Owned(E); |
| 294 | } |
| 295 | } |
| 296 | |
| 297 | return Owned(ImplicitCastExpr::Create(Context, Ty, Kind, E, BasePath, VK)); |
Sebastian Redl | 906082e | 2010-07-20 04:20:21 +0000 | [diff] [blame] | 298 | } |
| 299 | |
Abramo Bagnara | 737d544 | 2011-04-07 09:26:19 +0000 | [diff] [blame] | 300 | /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding |
| 301 | /// to the conversion from scalar type ScalarTy to the Boolean type. |
| 302 | CastKind Sema::ScalarTypeToBooleanCastKind(QualType ScalarTy) { |
| 303 | switch (ScalarTy->getScalarTypeKind()) { |
| 304 | case Type::STK_Bool: return CK_NoOp; |
John McCall | 1d9b3b2 | 2011-09-09 05:25:32 +0000 | [diff] [blame] | 305 | case Type::STK_CPointer: return CK_PointerToBoolean; |
| 306 | case Type::STK_BlockPointer: return CK_PointerToBoolean; |
| 307 | case Type::STK_ObjCObjectPointer: return CK_PointerToBoolean; |
Abramo Bagnara | 737d544 | 2011-04-07 09:26:19 +0000 | [diff] [blame] | 308 | case Type::STK_MemberPointer: return CK_MemberPointerToBoolean; |
| 309 | case Type::STK_Integral: return CK_IntegralToBoolean; |
| 310 | case Type::STK_Floating: return CK_FloatingToBoolean; |
| 311 | case Type::STK_IntegralComplex: return CK_IntegralComplexToBoolean; |
| 312 | case Type::STK_FloatingComplex: return CK_FloatingComplexToBoolean; |
| 313 | } |
| 314 | return CK_Invalid; |
| 315 | } |
| 316 | |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 317 | /// \brief Used to prune the decls of Sema's UnusedFileScopedDecls vector. |
| 318 | static bool ShouldRemoveFromUnused(Sema *SemaRef, const DeclaratorDecl *D) { |
| 319 | if (D->isUsed()) |
| 320 | return true; |
| 321 | |
| 322 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { |
| 323 | // UnusedFileScopedDecls stores the first declaration. |
| 324 | // The declaration may have become definition so check again. |
| 325 | const FunctionDecl *DeclToCheck; |
| 326 | if (FD->hasBody(DeclToCheck)) |
| 327 | return !SemaRef->ShouldWarnIfUnusedFileScopedDecl(DeclToCheck); |
| 328 | |
| 329 | // Later redecls may add new information resulting in not having to warn, |
| 330 | // so check again. |
Douglas Gregor | ef96ee0 | 2012-01-14 16:38:05 +0000 | [diff] [blame] | 331 | DeclToCheck = FD->getMostRecentDecl(); |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 332 | if (DeclToCheck != FD) |
| 333 | return !SemaRef->ShouldWarnIfUnusedFileScopedDecl(DeclToCheck); |
| 334 | } |
| 335 | |
| 336 | if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { |
| 337 | // UnusedFileScopedDecls stores the first declaration. |
| 338 | // The declaration may have become definition so check again. |
| 339 | const VarDecl *DeclToCheck = VD->getDefinition(); |
| 340 | if (DeclToCheck) |
| 341 | return !SemaRef->ShouldWarnIfUnusedFileScopedDecl(DeclToCheck); |
| 342 | |
| 343 | // Later redecls may add new information resulting in not having to warn, |
| 344 | // so check again. |
Douglas Gregor | ef96ee0 | 2012-01-14 16:38:05 +0000 | [diff] [blame] | 345 | DeclToCheck = VD->getMostRecentDecl(); |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 346 | if (DeclToCheck != VD) |
| 347 | return !SemaRef->ShouldWarnIfUnusedFileScopedDecl(DeclToCheck); |
| 348 | } |
| 349 | |
| 350 | return false; |
| 351 | } |
| 352 | |
John McCall | 15e310a | 2011-02-19 02:53:41 +0000 | [diff] [blame] | 353 | namespace { |
| 354 | struct UndefinedInternal { |
| 355 | NamedDecl *decl; |
| 356 | FullSourceLoc useLoc; |
| 357 | |
| 358 | UndefinedInternal(NamedDecl *decl, FullSourceLoc useLoc) |
| 359 | : decl(decl), useLoc(useLoc) {} |
| 360 | }; |
| 361 | |
| 362 | bool operator<(const UndefinedInternal &l, const UndefinedInternal &r) { |
| 363 | return l.useLoc.isBeforeInTranslationUnitThan(r.useLoc); |
| 364 | } |
| 365 | } |
| 366 | |
| 367 | /// checkUndefinedInternals - Check for undefined objects with internal linkage. |
| 368 | static void checkUndefinedInternals(Sema &S) { |
| 369 | if (S.UndefinedInternals.empty()) return; |
| 370 | |
| 371 | // Collect all the still-undefined entities with internal linkage. |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 372 | SmallVector<UndefinedInternal, 16> undefined; |
John McCall | 15e310a | 2011-02-19 02:53:41 +0000 | [diff] [blame] | 373 | for (llvm::DenseMap<NamedDecl*,SourceLocation>::iterator |
| 374 | i = S.UndefinedInternals.begin(), e = S.UndefinedInternals.end(); |
| 375 | i != e; ++i) { |
| 376 | NamedDecl *decl = i->first; |
| 377 | |
| 378 | // Ignore attributes that have become invalid. |
| 379 | if (decl->isInvalidDecl()) continue; |
| 380 | |
| 381 | // __attribute__((weakref)) is basically a definition. |
| 382 | if (decl->hasAttr<WeakRefAttr>()) continue; |
| 383 | |
| 384 | if (FunctionDecl *fn = dyn_cast<FunctionDecl>(decl)) { |
| 385 | if (fn->isPure() || fn->hasBody()) |
| 386 | continue; |
| 387 | } else { |
| 388 | if (cast<VarDecl>(decl)->hasDefinition() != VarDecl::DeclarationOnly) |
| 389 | continue; |
| 390 | } |
| 391 | |
| 392 | // We build a FullSourceLoc so that we can sort with array_pod_sort. |
| 393 | FullSourceLoc loc(i->second, S.Context.getSourceManager()); |
| 394 | undefined.push_back(UndefinedInternal(decl, loc)); |
| 395 | } |
| 396 | |
| 397 | if (undefined.empty()) return; |
| 398 | |
| 399 | // Sort (in order of use site) so that we're not (as) dependent on |
| 400 | // the iteration order through an llvm::DenseMap. |
| 401 | llvm::array_pod_sort(undefined.begin(), undefined.end()); |
| 402 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 403 | for (SmallVectorImpl<UndefinedInternal>::iterator |
John McCall | 15e310a | 2011-02-19 02:53:41 +0000 | [diff] [blame] | 404 | i = undefined.begin(), e = undefined.end(); i != e; ++i) { |
| 405 | NamedDecl *decl = i->decl; |
| 406 | S.Diag(decl->getLocation(), diag::warn_undefined_internal) |
| 407 | << isa<VarDecl>(decl) << decl; |
| 408 | S.Diag(i->useLoc, diag::note_used_here); |
| 409 | } |
| 410 | } |
| 411 | |
Douglas Gregor | 31e37b2 | 2011-07-28 18:09:57 +0000 | [diff] [blame] | 412 | void Sema::LoadExternalWeakUndeclaredIdentifiers() { |
| 413 | if (!ExternalSource) |
| 414 | return; |
| 415 | |
| 416 | SmallVector<std::pair<IdentifierInfo *, WeakInfo>, 4> WeakIDs; |
| 417 | ExternalSource->ReadWeakUndeclaredIdentifiers(WeakIDs); |
| 418 | for (unsigned I = 0, N = WeakIDs.size(); I != N; ++I) { |
| 419 | llvm::DenseMap<IdentifierInfo*,WeakInfo>::iterator Pos |
| 420 | = WeakUndeclaredIdentifiers.find(WeakIDs[I].first); |
| 421 | if (Pos != WeakUndeclaredIdentifiers.end()) |
| 422 | continue; |
| 423 | |
| 424 | WeakUndeclaredIdentifiers.insert(WeakIDs[I]); |
| 425 | } |
| 426 | } |
| 427 | |
Daniel Jasper | f8cc02e | 2012-06-06 08:32:04 +0000 | [diff] [blame] | 428 | |
| 429 | typedef llvm::DenseMap<const CXXRecordDecl*, bool> RecordCompleteMap; |
| 430 | |
| 431 | /// \brief Returns true, if all methods and nested classes of the given |
| 432 | /// CXXRecordDecl are defined in this translation unit. |
| 433 | /// |
| 434 | /// Should only be called from ActOnEndOfTranslationUnit so that all |
| 435 | /// definitions are actually read. |
| 436 | static bool MethodsAndNestedClassesComplete(const CXXRecordDecl *RD, |
| 437 | RecordCompleteMap &MNCComplete) { |
| 438 | RecordCompleteMap::iterator Cache = MNCComplete.find(RD); |
| 439 | if (Cache != MNCComplete.end()) |
| 440 | return Cache->second; |
| 441 | if (!RD->isCompleteDefinition()) |
| 442 | return false; |
| 443 | bool Complete = true; |
| 444 | for (DeclContext::decl_iterator I = RD->decls_begin(), |
| 445 | E = RD->decls_end(); |
| 446 | I != E && Complete; ++I) { |
| 447 | if (const CXXMethodDecl *M = dyn_cast<CXXMethodDecl>(*I)) |
| 448 | Complete = M->isDefined() || (M->isPure() && !isa<CXXDestructorDecl>(M)); |
Daniel Jasper | 0e9e9f8 | 2012-06-14 20:56:06 +0000 | [diff] [blame] | 449 | else if (const FunctionTemplateDecl *F = dyn_cast<FunctionTemplateDecl>(*I)) |
| 450 | Complete = F->getTemplatedDecl()->isDefined(); |
Daniel Jasper | f8cc02e | 2012-06-06 08:32:04 +0000 | [diff] [blame] | 451 | else if (const CXXRecordDecl *R = dyn_cast<CXXRecordDecl>(*I)) { |
| 452 | if (R->isInjectedClassName()) |
| 453 | continue; |
| 454 | if (R->hasDefinition()) |
| 455 | Complete = MethodsAndNestedClassesComplete(R->getDefinition(), |
| 456 | MNCComplete); |
| 457 | else |
| 458 | Complete = false; |
| 459 | } |
| 460 | } |
| 461 | MNCComplete[RD] = Complete; |
| 462 | return Complete; |
| 463 | } |
| 464 | |
| 465 | /// \brief Returns true, if the given CXXRecordDecl is fully defined in this |
| 466 | /// translation unit, i.e. all methods are defined or pure virtual and all |
| 467 | /// friends, friend functions and nested classes are fully defined in this |
| 468 | /// translation unit. |
| 469 | /// |
| 470 | /// Should only be called from ActOnEndOfTranslationUnit so that all |
| 471 | /// definitions are actually read. |
| 472 | static bool IsRecordFullyDefined(const CXXRecordDecl *RD, |
| 473 | RecordCompleteMap &RecordsComplete, |
| 474 | RecordCompleteMap &MNCComplete) { |
| 475 | RecordCompleteMap::iterator Cache = RecordsComplete.find(RD); |
| 476 | if (Cache != RecordsComplete.end()) |
| 477 | return Cache->second; |
| 478 | bool Complete = MethodsAndNestedClassesComplete(RD, MNCComplete); |
| 479 | for (CXXRecordDecl::friend_iterator I = RD->friend_begin(), |
| 480 | E = RD->friend_end(); |
| 481 | I != E && Complete; ++I) { |
| 482 | // Check if friend classes and methods are complete. |
| 483 | if (TypeSourceInfo *TSI = (*I)->getFriendType()) { |
| 484 | // Friend classes are available as the TypeSourceInfo of the FriendDecl. |
| 485 | if (CXXRecordDecl *FriendD = TSI->getType()->getAsCXXRecordDecl()) |
| 486 | Complete = MethodsAndNestedClassesComplete(FriendD, MNCComplete); |
| 487 | else |
| 488 | Complete = false; |
| 489 | } else { |
| 490 | // Friend functions are available through the NamedDecl of FriendDecl. |
| 491 | if (const FunctionDecl *FD = |
| 492 | dyn_cast<FunctionDecl>((*I)->getFriendDecl())) |
| 493 | Complete = FD->isDefined(); |
| 494 | else |
| 495 | // This is a template friend, give up. |
| 496 | Complete = false; |
| 497 | } |
| 498 | } |
| 499 | RecordsComplete[RD] = Complete; |
| 500 | return Complete; |
| 501 | } |
| 502 | |
Chris Lattner | 9299f3f | 2008-08-23 03:19:52 +0000 | [diff] [blame] | 503 | /// ActOnEndOfTranslationUnit - This is called at the very end of the |
| 504 | /// translation unit when EOF is reached and all but the top-level scope is |
| 505 | /// popped. |
Argyrios Kyrtzidis | 0e03638 | 2010-08-05 09:48:16 +0000 | [diff] [blame] | 506 | void Sema::ActOnEndOfTranslationUnit() { |
John McCall | 9257664 | 2012-05-07 06:16:41 +0000 | [diff] [blame] | 507 | assert(DelayedDiagnostics.getCurrentPool() == NULL |
| 508 | && "reached end of translation unit with a pool attached?"); |
| 509 | |
Douglas Gregor | d82f5eb | 2012-08-17 22:17:36 +0000 | [diff] [blame] | 510 | // If code completion is enabled, don't perform any end-of-translation-unit |
| 511 | // work. |
| 512 | if (PP.isCodeCompletionEnabled()) |
| 513 | return; |
| 514 | |
Douglas Gregor | 467dc88 | 2011-08-25 22:30:56 +0000 | [diff] [blame] | 515 | // Only complete translation units define vtables and perform implicit |
| 516 | // instantiations. |
| 517 | if (TUKind == TU_Complete) { |
Argyrios Kyrtzidis | 849639d | 2012-02-07 16:50:53 +0000 | [diff] [blame] | 518 | DiagnoseUseOfUnimplementedSelectors(); |
| 519 | |
Chandler Carruth | aee543a | 2010-12-12 21:36:11 +0000 | [diff] [blame] | 520 | // If any dynamic classes have their key function defined within |
| 521 | // this translation unit, then those vtables are considered "used" and must |
| 522 | // be emitted. |
Douglas Gregor | a126f17 | 2011-07-28 00:53:40 +0000 | [diff] [blame] | 523 | for (DynamicClassesType::iterator I = DynamicClasses.begin(ExternalSource), |
| 524 | E = DynamicClasses.end(); |
| 525 | I != E; ++I) { |
| 526 | assert(!(*I)->isDependentType() && |
Anders Carlsson | a5c6c2a | 2011-01-25 18:08:22 +0000 | [diff] [blame] | 527 | "Should not see dependent types here!"); |
Douglas Gregor | a126f17 | 2011-07-28 00:53:40 +0000 | [diff] [blame] | 528 | if (const CXXMethodDecl *KeyFunction = Context.getKeyFunction(*I)) { |
Chandler Carruth | aee543a | 2010-12-12 21:36:11 +0000 | [diff] [blame] | 529 | const FunctionDecl *Definition = 0; |
| 530 | if (KeyFunction->hasBody(Definition)) |
Douglas Gregor | a126f17 | 2011-07-28 00:53:40 +0000 | [diff] [blame] | 531 | MarkVTableUsed(Definition->getLocation(), *I, true); |
Chandler Carruth | aee543a | 2010-12-12 21:36:11 +0000 | [diff] [blame] | 532 | } |
| 533 | } |
| 534 | |
Nick Lewycky | 8155910 | 2011-05-31 07:58:42 +0000 | [diff] [blame] | 535 | // If DefinedUsedVTables ends up marking any virtual member functions it |
| 536 | // might lead to more pending template instantiations, which we then need |
| 537 | // to instantiate. |
| 538 | DefineUsedVTables(); |
Argyrios Kyrtzidis | 0e03638 | 2010-08-05 09:48:16 +0000 | [diff] [blame] | 539 | |
Nick Lewycky | 8155910 | 2011-05-31 07:58:42 +0000 | [diff] [blame] | 540 | // C++: Perform implicit template instantiations. |
| 541 | // |
| 542 | // FIXME: When we perform these implicit instantiations, we do not |
| 543 | // carefully keep track of the point of instantiation (C++ [temp.point]). |
| 544 | // This means that name lookup that occurs within the template |
| 545 | // instantiation will always happen at the end of the translation unit, |
| 546 | // so it will find some names that should not be found. Although this is |
| 547 | // common behavior for C++ compilers, it is technically wrong. In the |
| 548 | // future, we either need to be able to filter the results of name lookup |
| 549 | // or we need to perform template instantiations earlier. |
| 550 | PerformPendingInstantiations(); |
Nick Lewycky | 2a5f99e | 2010-11-25 00:35:20 +0000 | [diff] [blame] | 551 | } |
Anders Carlsson | d6a637f | 2009-12-07 08:24:59 +0000 | [diff] [blame] | 552 | |
Argyrios Kyrtzidis | 49b96d1 | 2010-08-13 18:42:17 +0000 | [diff] [blame] | 553 | // Remove file scoped decls that turned out to be used. |
Douglas Gregor | a2ee20a | 2011-07-27 21:45:57 +0000 | [diff] [blame] | 554 | UnusedFileScopedDecls.erase(std::remove_if(UnusedFileScopedDecls.begin(0, |
| 555 | true), |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 556 | UnusedFileScopedDecls.end(), |
| 557 | std::bind1st(std::ptr_fun(ShouldRemoveFromUnused), |
| 558 | this)), |
Argyrios Kyrtzidis | 49b96d1 | 2010-08-13 18:42:17 +0000 | [diff] [blame] | 559 | UnusedFileScopedDecls.end()); |
Douglas Gregor | 47268a3 | 2010-04-09 17:41:13 +0000 | [diff] [blame] | 560 | |
Douglas Gregor | 467dc88 | 2011-08-25 22:30:56 +0000 | [diff] [blame] | 561 | if (TUKind == TU_Prefix) { |
| 562 | // Translation unit prefixes don't need any of the checking below. |
Douglas Gregor | 87c08a5 | 2010-08-13 22:48:40 +0000 | [diff] [blame] | 563 | TUScope = 0; |
Argyrios Kyrtzidis | 72b9057 | 2010-08-05 09:48:08 +0000 | [diff] [blame] | 564 | return; |
Douglas Gregor | 87c08a5 | 2010-08-13 22:48:40 +0000 | [diff] [blame] | 565 | } |
Argyrios Kyrtzidis | 72b9057 | 2010-08-05 09:48:08 +0000 | [diff] [blame] | 566 | |
Chris Lattner | 63d65f8 | 2009-09-08 18:19:27 +0000 | [diff] [blame] | 567 | // Check for #pragma weak identifiers that were never declared |
| 568 | // FIXME: This will cause diagnostics to be emitted in a non-determinstic |
| 569 | // order! Iterating over a densemap like this is bad. |
Douglas Gregor | 31e37b2 | 2011-07-28 18:09:57 +0000 | [diff] [blame] | 570 | LoadExternalWeakUndeclaredIdentifiers(); |
Ryan Flynn | e25ff83 | 2009-07-30 03:15:39 +0000 | [diff] [blame] | 571 | for (llvm::DenseMap<IdentifierInfo*,WeakInfo>::iterator |
Chris Lattner | 63d65f8 | 2009-09-08 18:19:27 +0000 | [diff] [blame] | 572 | I = WeakUndeclaredIdentifiers.begin(), |
| 573 | E = WeakUndeclaredIdentifiers.end(); I != E; ++I) { |
| 574 | if (I->second.getUsed()) continue; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 575 | |
Chris Lattner | 63d65f8 | 2009-09-08 18:19:27 +0000 | [diff] [blame] | 576 | Diag(I->second.getLocation(), diag::warn_weak_identifier_undeclared) |
| 577 | << I->first; |
Ryan Flynn | e25ff83 | 2009-07-30 03:15:39 +0000 | [diff] [blame] | 578 | } |
| 579 | |
Douglas Gregor | 467dc88 | 2011-08-25 22:30:56 +0000 | [diff] [blame] | 580 | if (TUKind == TU_Module) { |
Douglas Gregor | 90db260 | 2011-12-02 01:47:07 +0000 | [diff] [blame] | 581 | // If we are building a module, resolve all of the exported declarations |
| 582 | // now. |
| 583 | if (Module *CurrentModule = PP.getCurrentModule()) { |
| 584 | ModuleMap &ModMap = PP.getHeaderSearchInfo().getModuleMap(); |
| 585 | |
| 586 | llvm::SmallVector<Module *, 2> Stack; |
| 587 | Stack.push_back(CurrentModule); |
| 588 | while (!Stack.empty()) { |
| 589 | Module *Mod = Stack.back(); |
| 590 | Stack.pop_back(); |
| 591 | |
| 592 | // Resolve the exported declarations. |
| 593 | // FIXME: Actually complain, once we figure out how to teach the |
| 594 | // diagnostic client to deal with complains in the module map at this |
| 595 | // point. |
| 596 | ModMap.resolveExports(Mod, /*Complain=*/false); |
| 597 | |
| 598 | // Queue the submodules, so their exports will also be resolved. |
Douglas Gregor | b7a7819 | 2012-01-04 23:32:19 +0000 | [diff] [blame] | 599 | for (Module::submodule_iterator Sub = Mod->submodule_begin(), |
| 600 | SubEnd = Mod->submodule_end(); |
Douglas Gregor | 90db260 | 2011-12-02 01:47:07 +0000 | [diff] [blame] | 601 | Sub != SubEnd; ++Sub) { |
Douglas Gregor | b7a7819 | 2012-01-04 23:32:19 +0000 | [diff] [blame] | 602 | Stack.push_back(*Sub); |
Douglas Gregor | 90db260 | 2011-12-02 01:47:07 +0000 | [diff] [blame] | 603 | } |
| 604 | } |
| 605 | } |
| 606 | |
Douglas Gregor | 467dc88 | 2011-08-25 22:30:56 +0000 | [diff] [blame] | 607 | // Modules don't need any of the checking below. |
| 608 | TUScope = 0; |
| 609 | return; |
| 610 | } |
| 611 | |
Douglas Gregor | 275a369 | 2009-03-10 23:43:53 +0000 | [diff] [blame] | 612 | // C99 6.9.2p2: |
| 613 | // A declaration of an identifier for an object that has file |
| 614 | // scope without an initializer, and without a storage-class |
| 615 | // specifier or with the storage-class specifier static, |
| 616 | // constitutes a tentative definition. If a translation unit |
| 617 | // contains one or more tentative definitions for an identifier, |
| 618 | // and the translation unit contains no external definition for |
| 619 | // that identifier, then the behavior is exactly as if the |
| 620 | // translation unit contains a file scope declaration of that |
| 621 | // identifier, with the composite type as of the end of the |
| 622 | // translation unit, with an initializer equal to 0. |
Sebastian Redl | e9d12b6 | 2010-01-31 22:27:38 +0000 | [diff] [blame] | 623 | llvm::SmallSet<VarDecl *, 32> Seen; |
Douglas Gregor | a862320 | 2011-07-27 20:58:46 +0000 | [diff] [blame] | 624 | for (TentativeDefinitionsType::iterator |
| 625 | T = TentativeDefinitions.begin(ExternalSource), |
| 626 | TEnd = TentativeDefinitions.end(); |
| 627 | T != TEnd; ++T) |
| 628 | { |
| 629 | VarDecl *VD = (*T)->getActingDefinition(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 630 | |
Sebastian Redl | e9d12b6 | 2010-01-31 22:27:38 +0000 | [diff] [blame] | 631 | // If the tentative definition was completed, getActingDefinition() returns |
| 632 | // null. If we've already seen this variable before, insert()'s second |
| 633 | // return value is false. |
| 634 | if (VD == 0 || VD->isInvalidDecl() || !Seen.insert(VD)) |
Douglas Gregor | b6c8c8b | 2009-04-21 17:11:58 +0000 | [diff] [blame] | 635 | continue; |
| 636 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 637 | if (const IncompleteArrayType *ArrayT |
Douglas Gregor | b6c8c8b | 2009-04-21 17:11:58 +0000 | [diff] [blame] | 638 | = Context.getAsIncompleteArrayType(VD->getType())) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 639 | if (RequireCompleteType(VD->getLocation(), |
Douglas Gregor | b6c8c8b | 2009-04-21 17:11:58 +0000 | [diff] [blame] | 640 | ArrayT->getElementType(), |
Chris Lattner | 63d65f8 | 2009-09-08 18:19:27 +0000 | [diff] [blame] | 641 | diag::err_tentative_def_incomplete_type_arr)) { |
Douglas Gregor | b6c8c8b | 2009-04-21 17:11:58 +0000 | [diff] [blame] | 642 | VD->setInvalidDecl(); |
Chris Lattner | 63d65f8 | 2009-09-08 18:19:27 +0000 | [diff] [blame] | 643 | continue; |
Douglas Gregor | 275a369 | 2009-03-10 23:43:53 +0000 | [diff] [blame] | 644 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 645 | |
Chris Lattner | 63d65f8 | 2009-09-08 18:19:27 +0000 | [diff] [blame] | 646 | // Set the length of the array to 1 (C99 6.9.2p5). |
| 647 | Diag(VD->getLocation(), diag::warn_tentative_incomplete_array); |
| 648 | llvm::APInt One(Context.getTypeSize(Context.getSizeType()), true); |
John McCall | 46a617a | 2009-10-16 00:14:28 +0000 | [diff] [blame] | 649 | QualType T = Context.getConstantArrayType(ArrayT->getElementType(), |
| 650 | One, ArrayType::Normal, 0); |
Chris Lattner | 63d65f8 | 2009-09-08 18:19:27 +0000 | [diff] [blame] | 651 | VD->setType(T); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 652 | } else if (RequireCompleteType(VD->getLocation(), VD->getType(), |
Douglas Gregor | b6c8c8b | 2009-04-21 17:11:58 +0000 | [diff] [blame] | 653 | diag::err_tentative_def_incomplete_type)) |
| 654 | VD->setInvalidDecl(); |
| 655 | |
| 656 | // Notify the consumer that we've completed a tentative definition. |
| 657 | if (!VD->isInvalidDecl()) |
| 658 | Consumer.CompleteTentativeDefinition(VD); |
| 659 | |
Douglas Gregor | 275a369 | 2009-03-10 23:43:53 +0000 | [diff] [blame] | 660 | } |
Argyrios Kyrtzidis | 43f0a7c | 2011-01-31 07:04:37 +0000 | [diff] [blame] | 661 | |
Sean Hunt | c159870 | 2011-05-05 00:05:47 +0000 | [diff] [blame] | 662 | if (LangOpts.CPlusPlus0x && |
| 663 | Diags.getDiagnosticLevel(diag::warn_delegating_ctor_cycle, |
| 664 | SourceLocation()) |
David Blaikie | d6471f7 | 2011-09-25 23:23:43 +0000 | [diff] [blame] | 665 | != DiagnosticsEngine::Ignored) |
Sean Hunt | fe57eef | 2011-05-04 05:57:24 +0000 | [diff] [blame] | 666 | CheckDelegatingCtorCycles(); |
| 667 | |
Argyrios Kyrtzidis | 43f0a7c | 2011-01-31 07:04:37 +0000 | [diff] [blame] | 668 | // If there were errors, disable 'unused' warnings since they will mostly be |
| 669 | // noise. |
| 670 | if (!Diags.hasErrorOccurred()) { |
| 671 | // Output warning for unused file scoped decls. |
Douglas Gregor | a2ee20a | 2011-07-27 21:45:57 +0000 | [diff] [blame] | 672 | for (UnusedFileScopedDeclsType::iterator |
| 673 | I = UnusedFileScopedDecls.begin(ExternalSource), |
Argyrios Kyrtzidis | 43f0a7c | 2011-01-31 07:04:37 +0000 | [diff] [blame] | 674 | E = UnusedFileScopedDecls.end(); I != E; ++I) { |
Douglas Gregor | a2ee20a | 2011-07-27 21:45:57 +0000 | [diff] [blame] | 675 | if (ShouldRemoveFromUnused(this, *I)) |
| 676 | continue; |
| 677 | |
Argyrios Kyrtzidis | 43f0a7c | 2011-01-31 07:04:37 +0000 | [diff] [blame] | 678 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(*I)) { |
| 679 | const FunctionDecl *DiagD; |
| 680 | if (!FD->hasBody(DiagD)) |
| 681 | DiagD = FD; |
Argyrios Kyrtzidis | 48b8959 | 2011-03-03 17:47:42 +0000 | [diff] [blame] | 682 | if (DiagD->isDeleted()) |
| 683 | continue; // Deleted functions are supposed to be unused. |
Argyrios Kyrtzidis | 6b6b42a | 2011-04-19 19:51:10 +0000 | [diff] [blame] | 684 | if (DiagD->isReferenced()) { |
| 685 | if (isa<CXXMethodDecl>(DiagD)) |
| 686 | Diag(DiagD->getLocation(), diag::warn_unneeded_member_function) |
| 687 | << DiagD->getDeclName(); |
Fariborz Jahanian | 12d2cc7 | 2012-06-27 19:43:29 +0000 | [diff] [blame] | 688 | else { |
| 689 | if (FD->getStorageClassAsWritten() == SC_Static && |
| 690 | !FD->isInlineSpecified() && |
| 691 | !SourceMgr.isFromMainFile( |
| 692 | SourceMgr.getExpansionLoc(FD->getLocation()))) |
| 693 | Diag(DiagD->getLocation(), diag::warn_unneeded_static_internal_decl) |
| 694 | << DiagD->getDeclName(); |
| 695 | else |
| 696 | Diag(DiagD->getLocation(), diag::warn_unneeded_internal_decl) |
| 697 | << /*function*/0 << DiagD->getDeclName(); |
| 698 | } |
Argyrios Kyrtzidis | 6b6b42a | 2011-04-19 19:51:10 +0000 | [diff] [blame] | 699 | } else { |
| 700 | Diag(DiagD->getLocation(), |
| 701 | isa<CXXMethodDecl>(DiagD) ? diag::warn_unused_member_function |
| 702 | : diag::warn_unused_function) |
| 703 | << DiagD->getDeclName(); |
| 704 | } |
Argyrios Kyrtzidis | 43f0a7c | 2011-01-31 07:04:37 +0000 | [diff] [blame] | 705 | } else { |
| 706 | const VarDecl *DiagD = cast<VarDecl>(*I)->getDefinition(); |
| 707 | if (!DiagD) |
| 708 | DiagD = cast<VarDecl>(*I); |
Argyrios Kyrtzidis | 6b6b42a | 2011-04-19 19:51:10 +0000 | [diff] [blame] | 709 | if (DiagD->isReferenced()) { |
| 710 | Diag(DiagD->getLocation(), diag::warn_unneeded_internal_decl) |
| 711 | << /*variable*/1 << DiagD->getDeclName(); |
| 712 | } else { |
| 713 | Diag(DiagD->getLocation(), diag::warn_unused_variable) |
| 714 | << DiagD->getDeclName(); |
| 715 | } |
Argyrios Kyrtzidis | 43f0a7c | 2011-01-31 07:04:37 +0000 | [diff] [blame] | 716 | } |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 717 | } |
John McCall | 15e310a | 2011-02-19 02:53:41 +0000 | [diff] [blame] | 718 | |
| 719 | checkUndefinedInternals(*this); |
Argyrios Kyrtzidis | 49b96d1 | 2010-08-13 18:42:17 +0000 | [diff] [blame] | 720 | } |
Douglas Gregor | 87c08a5 | 2010-08-13 22:48:40 +0000 | [diff] [blame] | 721 | |
Daniel Jasper | f8cc02e | 2012-06-06 08:32:04 +0000 | [diff] [blame] | 722 | if (Diags.getDiagnosticLevel(diag::warn_unused_private_field, |
| 723 | SourceLocation()) |
| 724 | != DiagnosticsEngine::Ignored) { |
| 725 | RecordCompleteMap RecordsComplete; |
| 726 | RecordCompleteMap MNCComplete; |
| 727 | for (NamedDeclSetType::iterator I = UnusedPrivateFields.begin(), |
| 728 | E = UnusedPrivateFields.end(); I != E; ++I) { |
| 729 | const NamedDecl *D = *I; |
| 730 | const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D->getDeclContext()); |
| 731 | if (RD && !RD->isUnion() && |
| 732 | IsRecordFullyDefined(RD, RecordsComplete, MNCComplete)) { |
| 733 | Diag(D->getLocation(), diag::warn_unused_private_field) |
| 734 | << D->getDeclName(); |
| 735 | } |
| 736 | } |
| 737 | } |
| 738 | |
Richard Smith | 483b9f3 | 2011-02-21 20:05:19 +0000 | [diff] [blame] | 739 | // Check we've noticed that we're no longer parsing the initializer for every |
| 740 | // variable. If we miss cases, then at best we have a performance issue and |
| 741 | // at worst a rejects-valid bug. |
| 742 | assert(ParsingInitForAutoVars.empty() && |
| 743 | "Didn't unmark var as having its initializer parsed"); |
| 744 | |
Douglas Gregor | 87c08a5 | 2010-08-13 22:48:40 +0000 | [diff] [blame] | 745 | TUScope = 0; |
Chris Lattner | 9299f3f | 2008-08-23 03:19:52 +0000 | [diff] [blame] | 746 | } |
| 747 | |
| 748 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 749 | //===----------------------------------------------------------------------===// |
| 750 | // Helper functions. |
| 751 | //===----------------------------------------------------------------------===// |
| 752 | |
Anders Carlsson | 8517d9b | 2009-08-08 17:45:02 +0000 | [diff] [blame] | 753 | DeclContext *Sema::getFunctionLevelDeclContext() { |
John McCall | db0ee1d | 2009-12-19 10:53:49 +0000 | [diff] [blame] | 754 | DeclContext *DC = CurContext; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 755 | |
Eli Friedman | 72899c3 | 2012-01-07 04:59:52 +0000 | [diff] [blame] | 756 | while (true) { |
| 757 | if (isa<BlockDecl>(DC) || isa<EnumDecl>(DC)) { |
| 758 | DC = DC->getParent(); |
| 759 | } else if (isa<CXXMethodDecl>(DC) && |
Douglas Gregor | 215e4e1 | 2012-02-12 17:34:23 +0000 | [diff] [blame] | 760 | cast<CXXMethodDecl>(DC)->getOverloadedOperator() == OO_Call && |
Eli Friedman | 72899c3 | 2012-01-07 04:59:52 +0000 | [diff] [blame] | 761 | cast<CXXRecordDecl>(DC->getParent())->isLambda()) { |
| 762 | DC = DC->getParent()->getParent(); |
| 763 | } |
| 764 | else break; |
| 765 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 766 | |
Anders Carlsson | 8517d9b | 2009-08-08 17:45:02 +0000 | [diff] [blame] | 767 | return DC; |
| 768 | } |
| 769 | |
Chris Lattner | 371f258 | 2008-12-04 23:50:19 +0000 | [diff] [blame] | 770 | /// getCurFunctionDecl - If inside of a function body, this returns a pointer |
| 771 | /// to the function decl for the function being parsed. If we're currently |
| 772 | /// in a 'block', this returns the containing context. |
| 773 | FunctionDecl *Sema::getCurFunctionDecl() { |
Anders Carlsson | 8517d9b | 2009-08-08 17:45:02 +0000 | [diff] [blame] | 774 | DeclContext *DC = getFunctionLevelDeclContext(); |
Chris Lattner | 371f258 | 2008-12-04 23:50:19 +0000 | [diff] [blame] | 775 | return dyn_cast<FunctionDecl>(DC); |
| 776 | } |
| 777 | |
Daniel Dunbar | c4a1dea | 2008-08-11 05:35:13 +0000 | [diff] [blame] | 778 | ObjCMethodDecl *Sema::getCurMethodDecl() { |
Anders Carlsson | 8517d9b | 2009-08-08 17:45:02 +0000 | [diff] [blame] | 779 | DeclContext *DC = getFunctionLevelDeclContext(); |
Steve Naroff | d7612e1 | 2008-11-17 16:28:52 +0000 | [diff] [blame] | 780 | return dyn_cast<ObjCMethodDecl>(DC); |
Daniel Dunbar | c4a1dea | 2008-08-11 05:35:13 +0000 | [diff] [blame] | 781 | } |
Chris Lattner | 371f258 | 2008-12-04 23:50:19 +0000 | [diff] [blame] | 782 | |
| 783 | NamedDecl *Sema::getCurFunctionOrMethodDecl() { |
Anders Carlsson | 8517d9b | 2009-08-08 17:45:02 +0000 | [diff] [blame] | 784 | DeclContext *DC = getFunctionLevelDeclContext(); |
Chris Lattner | 371f258 | 2008-12-04 23:50:19 +0000 | [diff] [blame] | 785 | if (isa<ObjCMethodDecl>(DC) || isa<FunctionDecl>(DC)) |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 786 | return cast<NamedDecl>(DC); |
Chris Lattner | 371f258 | 2008-12-04 23:50:19 +0000 | [diff] [blame] | 787 | return 0; |
| 788 | } |
| 789 | |
Daniel Dunbar | 393eed7 | 2012-03-14 09:49:32 +0000 | [diff] [blame] | 790 | void Sema::EmitCurrentDiagnostic(unsigned DiagID) { |
| 791 | // FIXME: It doesn't make sense to me that DiagID is an incoming argument here |
| 792 | // and yet we also use the current diag ID on the DiagnosticsEngine. This has |
| 793 | // been made more painfully obvious by the refactor that introduced this |
| 794 | // function, but it is possible that the incoming argument can be |
| 795 | // eliminnated. If it truly cannot be (for example, there is some reentrancy |
| 796 | // issue I am not seeing yet), then there should at least be a clarifying |
| 797 | // comment somewhere. |
| 798 | if (llvm::Optional<TemplateDeductionInfo*> Info = isSFINAEContext()) { |
| 799 | switch (DiagnosticIDs::getDiagnosticSFINAEResponse( |
| 800 | Diags.getCurrentDiagID())) { |
Argyrios Kyrtzidis | 33e4e70 | 2010-11-18 20:06:41 +0000 | [diff] [blame] | 801 | case DiagnosticIDs::SFINAE_Report: |
Richard Smith | 77faa36 | 2011-10-19 00:07:01 +0000 | [diff] [blame] | 802 | // We'll report the diagnostic below. |
Douglas Gregor | 9b62363 | 2010-10-12 23:32:35 +0000 | [diff] [blame] | 803 | break; |
| 804 | |
Argyrios Kyrtzidis | 33e4e70 | 2010-11-18 20:06:41 +0000 | [diff] [blame] | 805 | case DiagnosticIDs::SFINAE_SubstitutionFailure: |
Douglas Gregor | 9b62363 | 2010-10-12 23:32:35 +0000 | [diff] [blame] | 806 | // Count this failure so that we know that template argument deduction |
| 807 | // has failed. |
Daniel Dunbar | 393eed7 | 2012-03-14 09:49:32 +0000 | [diff] [blame] | 808 | ++NumSFINAEErrors; |
Richard Smith | b8590f3 | 2012-05-07 09:03:25 +0000 | [diff] [blame] | 809 | |
| 810 | // Make a copy of this suppressed diagnostic and store it with the |
| 811 | // template-deduction information. |
| 812 | if (*Info && !(*Info)->hasSFINAEDiagnostic()) { |
| 813 | Diagnostic DiagInfo(&Diags); |
| 814 | (*Info)->addSFINAEDiagnostic(DiagInfo.getLocation(), |
| 815 | PartialDiagnostic(DiagInfo, Context.getDiagAllocator())); |
| 816 | } |
| 817 | |
Daniel Dunbar | 393eed7 | 2012-03-14 09:49:32 +0000 | [diff] [blame] | 818 | Diags.setLastDiagnosticIgnored(); |
| 819 | Diags.Clear(); |
Douglas Gregor | 9b62363 | 2010-10-12 23:32:35 +0000 | [diff] [blame] | 820 | return; |
| 821 | |
Richard Smith | 77faa36 | 2011-10-19 00:07:01 +0000 | [diff] [blame] | 822 | case DiagnosticIDs::SFINAE_AccessControl: { |
| 823 | // Per C++ Core Issue 1170, access control is part of SFINAE. |
Daniel Dunbar | 00b4384 | 2012-03-13 18:30:54 +0000 | [diff] [blame] | 824 | // Additionally, the AccessCheckingSFINAE flag can be used to temporarily |
Richard Smith | 77faa36 | 2011-10-19 00:07:01 +0000 | [diff] [blame] | 825 | // make access control a part of SFINAE for the purposes of checking |
| 826 | // type traits. |
Daniel Dunbar | 393eed7 | 2012-03-14 09:49:32 +0000 | [diff] [blame] | 827 | if (!AccessCheckingSFINAE && !getLangOpts().CPlusPlus0x) |
Richard Smith | 77faa36 | 2011-10-19 00:07:01 +0000 | [diff] [blame] | 828 | break; |
| 829 | |
Daniel Dunbar | 393eed7 | 2012-03-14 09:49:32 +0000 | [diff] [blame] | 830 | SourceLocation Loc = Diags.getCurrentDiagLoc(); |
Richard Smith | 77faa36 | 2011-10-19 00:07:01 +0000 | [diff] [blame] | 831 | |
| 832 | // Suppress this diagnostic. |
Daniel Dunbar | 393eed7 | 2012-03-14 09:49:32 +0000 | [diff] [blame] | 833 | ++NumSFINAEErrors; |
Richard Smith | b8590f3 | 2012-05-07 09:03:25 +0000 | [diff] [blame] | 834 | |
| 835 | // Make a copy of this suppressed diagnostic and store it with the |
| 836 | // template-deduction information. |
| 837 | if (*Info && !(*Info)->hasSFINAEDiagnostic()) { |
| 838 | Diagnostic DiagInfo(&Diags); |
| 839 | (*Info)->addSFINAEDiagnostic(DiagInfo.getLocation(), |
| 840 | PartialDiagnostic(DiagInfo, Context.getDiagAllocator())); |
| 841 | } |
| 842 | |
Daniel Dunbar | 393eed7 | 2012-03-14 09:49:32 +0000 | [diff] [blame] | 843 | Diags.setLastDiagnosticIgnored(); |
| 844 | Diags.Clear(); |
Richard Smith | 77faa36 | 2011-10-19 00:07:01 +0000 | [diff] [blame] | 845 | |
| 846 | // Now the diagnostic state is clear, produce a C++98 compatibility |
| 847 | // warning. |
Daniel Dunbar | 393eed7 | 2012-03-14 09:49:32 +0000 | [diff] [blame] | 848 | Diag(Loc, diag::warn_cxx98_compat_sfinae_access_control); |
Richard Smith | 77faa36 | 2011-10-19 00:07:01 +0000 | [diff] [blame] | 849 | |
| 850 | // The last diagnostic which Sema produced was ignored. Suppress any |
| 851 | // notes attached to it. |
Daniel Dunbar | 393eed7 | 2012-03-14 09:49:32 +0000 | [diff] [blame] | 852 | Diags.setLastDiagnosticIgnored(); |
Richard Smith | 77faa36 | 2011-10-19 00:07:01 +0000 | [diff] [blame] | 853 | return; |
| 854 | } |
| 855 | |
Argyrios Kyrtzidis | 33e4e70 | 2010-11-18 20:06:41 +0000 | [diff] [blame] | 856 | case DiagnosticIDs::SFINAE_Suppress: |
Douglas Gregor | 9b62363 | 2010-10-12 23:32:35 +0000 | [diff] [blame] | 857 | // Make a copy of this suppressed diagnostic and store it with the |
| 858 | // template-deduction information; |
Richard Smith | b8590f3 | 2012-05-07 09:03:25 +0000 | [diff] [blame] | 859 | if (*Info) { |
| 860 | Diagnostic DiagInfo(&Diags); |
Douglas Gregor | 1eee5dc | 2011-01-27 22:31:44 +0000 | [diff] [blame] | 861 | (*Info)->addSuppressedDiagnostic(DiagInfo.getLocation(), |
Richard Smith | b8590f3 | 2012-05-07 09:03:25 +0000 | [diff] [blame] | 862 | PartialDiagnostic(DiagInfo, Context.getDiagAllocator())); |
| 863 | } |
| 864 | |
| 865 | // Suppress this diagnostic. |
Daniel Dunbar | 393eed7 | 2012-03-14 09:49:32 +0000 | [diff] [blame] | 866 | Diags.setLastDiagnosticIgnored(); |
| 867 | Diags.Clear(); |
Douglas Gregor | 9b62363 | 2010-10-12 23:32:35 +0000 | [diff] [blame] | 868 | return; |
| 869 | } |
| 870 | } |
| 871 | |
Douglas Gregor | 8987b23 | 2011-09-27 23:30:47 +0000 | [diff] [blame] | 872 | // Set up the context's printing policy based on our current state. |
Daniel Dunbar | 393eed7 | 2012-03-14 09:49:32 +0000 | [diff] [blame] | 873 | Context.setPrintingPolicy(getPrintingPolicy()); |
Douglas Gregor | 8987b23 | 2011-09-27 23:30:47 +0000 | [diff] [blame] | 874 | |
Douglas Gregor | 9b62363 | 2010-10-12 23:32:35 +0000 | [diff] [blame] | 875 | // Emit the diagnostic. |
Daniel Dunbar | 393eed7 | 2012-03-14 09:49:32 +0000 | [diff] [blame] | 876 | if (!Diags.EmitCurrentDiagnostic()) |
Douglas Gregor | 5e9f35c | 2009-06-14 07:33:30 +0000 | [diff] [blame] | 877 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 878 | |
Douglas Gregor | 25a88bb | 2009-03-20 22:48:49 +0000 | [diff] [blame] | 879 | // If this is not a note, and we're in a template instantiation |
| 880 | // that is different from the last template instantiation where |
| 881 | // we emitted an error, print a template instantiation |
| 882 | // backtrace. |
Argyrios Kyrtzidis | 33e4e70 | 2010-11-18 20:06:41 +0000 | [diff] [blame] | 883 | if (!DiagnosticIDs::isBuiltinNote(DiagID) && |
Daniel Dunbar | 393eed7 | 2012-03-14 09:49:32 +0000 | [diff] [blame] | 884 | !ActiveTemplateInstantiations.empty() && |
| 885 | ActiveTemplateInstantiations.back() |
| 886 | != LastTemplateInstantiationErrorContext) { |
| 887 | PrintInstantiationStack(); |
| 888 | LastTemplateInstantiationErrorContext = ActiveTemplateInstantiations.back(); |
Douglas Gregor | 25a88bb | 2009-03-20 22:48:49 +0000 | [diff] [blame] | 889 | } |
| 890 | } |
Douglas Gregor | 2e22253 | 2009-07-02 17:08:52 +0000 | [diff] [blame] | 891 | |
Anders Carlsson | 91a0cc9 | 2009-08-26 22:33:56 +0000 | [diff] [blame] | 892 | Sema::SemaDiagnosticBuilder |
| 893 | Sema::Diag(SourceLocation Loc, const PartialDiagnostic& PD) { |
| 894 | SemaDiagnosticBuilder Builder(Diag(Loc, PD.getDiagID())); |
| 895 | PD.Emit(Builder); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 896 | |
Anders Carlsson | 91a0cc9 | 2009-08-26 22:33:56 +0000 | [diff] [blame] | 897 | return Builder; |
| 898 | } |
| 899 | |
Chandler Carruth | 108f756 | 2011-07-26 05:40:03 +0000 | [diff] [blame] | 900 | /// \brief Looks through the macro-expansion chain for the given |
| 901 | /// location, looking for a macro expansion with the given name. |
John McCall | 834e3f6 | 2011-03-08 07:59:04 +0000 | [diff] [blame] | 902 | /// If one is found, returns true and sets the location to that |
Chandler Carruth | 108f756 | 2011-07-26 05:40:03 +0000 | [diff] [blame] | 903 | /// expansion loc. |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 904 | bool Sema::findMacroSpelling(SourceLocation &locref, StringRef name) { |
John McCall | 834e3f6 | 2011-03-08 07:59:04 +0000 | [diff] [blame] | 905 | SourceLocation loc = locref; |
| 906 | if (!loc.isMacroID()) return false; |
| 907 | |
| 908 | // There's no good way right now to look at the intermediate |
Chandler Carruth | 108f756 | 2011-07-26 05:40:03 +0000 | [diff] [blame] | 909 | // expansions, so just jump to the expansion location. |
Chandler Carruth | 4027853 | 2011-07-25 16:49:02 +0000 | [diff] [blame] | 910 | loc = getSourceManager().getExpansionLoc(loc); |
John McCall | 834e3f6 | 2011-03-08 07:59:04 +0000 | [diff] [blame] | 911 | |
| 912 | // If that's written with the name, stop here. |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 913 | SmallVector<char, 16> buffer; |
John McCall | 834e3f6 | 2011-03-08 07:59:04 +0000 | [diff] [blame] | 914 | if (getPreprocessor().getSpelling(loc, buffer) == name) { |
| 915 | locref = loc; |
| 916 | return true; |
| 917 | } |
| 918 | return false; |
| 919 | } |
| 920 | |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 921 | /// \brief Determines the active Scope associated with the given declaration |
| 922 | /// context. |
| 923 | /// |
| 924 | /// This routine maps a declaration context to the active Scope object that |
| 925 | /// represents that declaration context in the parser. It is typically used |
| 926 | /// from "scope-less" code (e.g., template instantiation, lazy creation of |
| 927 | /// declarations) that injects a name for name-lookup purposes and, therefore, |
| 928 | /// must update the Scope. |
| 929 | /// |
| 930 | /// \returns The scope corresponding to the given declaraion context, or NULL |
| 931 | /// if no such scope is open. |
| 932 | Scope *Sema::getScopeForContext(DeclContext *Ctx) { |
| 933 | |
| 934 | if (!Ctx) |
| 935 | return 0; |
| 936 | |
| 937 | Ctx = Ctx->getPrimaryContext(); |
| 938 | for (Scope *S = getCurScope(); S; S = S->getParent()) { |
Sebastian Redl | cddc69f | 2010-07-08 23:07:34 +0000 | [diff] [blame] | 939 | // Ignore scopes that cannot have declarations. This is important for |
| 940 | // out-of-line definitions of static class members. |
| 941 | if (S->getFlags() & (Scope::DeclScope | Scope::TemplateParamScope)) |
| 942 | if (DeclContext *Entity = static_cast<DeclContext *> (S->getEntity())) |
| 943 | if (Ctx == Entity->getPrimaryContext()) |
| 944 | return S; |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 945 | } |
| 946 | |
| 947 | return 0; |
| 948 | } |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 949 | |
| 950 | /// \brief Enter a new function scope |
| 951 | void Sema::PushFunctionScope() { |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 952 | if (FunctionScopes.size() == 1) { |
| 953 | // Use the "top" function scope rather than having to allocate |
| 954 | // memory for a new scope. |
Argyrios Kyrtzidis | 8fc32d2 | 2010-11-19 00:19:15 +0000 | [diff] [blame] | 955 | FunctionScopes.back()->Clear(); |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 956 | FunctionScopes.push_back(FunctionScopes.back()); |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 957 | return; |
| 958 | } |
| 959 | |
Argyrios Kyrtzidis | 8fc32d2 | 2010-11-19 00:19:15 +0000 | [diff] [blame] | 960 | FunctionScopes.push_back(new FunctionScopeInfo(getDiagnostics())); |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 961 | } |
| 962 | |
| 963 | void Sema::PushBlockScope(Scope *BlockScope, BlockDecl *Block) { |
Argyrios Kyrtzidis | 8fc32d2 | 2010-11-19 00:19:15 +0000 | [diff] [blame] | 964 | FunctionScopes.push_back(new BlockScopeInfo(getDiagnostics(), |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 965 | BlockScope, Block)); |
| 966 | } |
| 967 | |
Douglas Gregor | 76e3da5 | 2012-02-08 20:17:14 +0000 | [diff] [blame] | 968 | void Sema::PushLambdaScope(CXXRecordDecl *Lambda, |
| 969 | CXXMethodDecl *CallOperator) { |
| 970 | FunctionScopes.push_back(new LambdaScopeInfo(getDiagnostics(), Lambda, |
| 971 | CallOperator)); |
Eli Friedman | ec9ea72 | 2012-01-05 03:35:19 +0000 | [diff] [blame] | 972 | } |
| 973 | |
| 974 | void Sema::PopFunctionScopeInfo(const AnalysisBasedWarnings::Policy *WP, |
| 975 | const Decl *D, const BlockExpr *blkExpr) { |
Ted Kremenek | 3ed6fc0 | 2011-02-23 01:51:48 +0000 | [diff] [blame] | 976 | FunctionScopeInfo *Scope = FunctionScopes.pop_back_val(); |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 977 | assert(!FunctionScopes.empty() && "mismatched push/pop!"); |
Ted Kremenek | 3ed6fc0 | 2011-02-23 01:51:48 +0000 | [diff] [blame] | 978 | |
| 979 | // Issue any analysis-based warnings. |
| 980 | if (WP && D) |
Ted Kremenek | 283a358 | 2011-02-23 01:51:53 +0000 | [diff] [blame] | 981 | AnalysisWarnings.IssueWarnings(*WP, Scope, D, blkExpr); |
Ted Kremenek | 351ba91 | 2011-02-23 01:52:04 +0000 | [diff] [blame] | 982 | else { |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 983 | for (SmallVectorImpl<sema::PossiblyUnreachableDiag>::iterator |
Ted Kremenek | 351ba91 | 2011-02-23 01:52:04 +0000 | [diff] [blame] | 984 | i = Scope->PossiblyUnreachableDiags.begin(), |
| 985 | e = Scope->PossiblyUnreachableDiags.end(); |
| 986 | i != e; ++i) { |
| 987 | const sema::PossiblyUnreachableDiag &D = *i; |
| 988 | Diag(D.Loc, D.PD); |
| 989 | } |
| 990 | } |
Ted Kremenek | 3ed6fc0 | 2011-02-23 01:51:48 +0000 | [diff] [blame] | 991 | |
Ted Kremenek | 351ba91 | 2011-02-23 01:52:04 +0000 | [diff] [blame] | 992 | if (FunctionScopes.back() != Scope) { |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 993 | delete Scope; |
Ted Kremenek | 351ba91 | 2011-02-23 01:52:04 +0000 | [diff] [blame] | 994 | } |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 995 | } |
| 996 | |
Dmitri Gribenko | 625bb56 | 2012-02-14 22:14:32 +0000 | [diff] [blame] | 997 | void Sema::PushCompoundScope() { |
| 998 | getCurFunction()->CompoundScopes.push_back(CompoundScopeInfo()); |
| 999 | } |
| 1000 | |
| 1001 | void Sema::PopCompoundScope() { |
| 1002 | FunctionScopeInfo *CurFunction = getCurFunction(); |
| 1003 | assert(!CurFunction->CompoundScopes.empty() && "mismatched push/pop"); |
| 1004 | |
| 1005 | CurFunction->CompoundScopes.pop_back(); |
| 1006 | } |
| 1007 | |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 1008 | /// \brief Determine whether any errors occurred within this function/method/ |
| 1009 | /// block. |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1010 | bool Sema::hasAnyUnrecoverableErrorsInThisFunction() const { |
| 1011 | return getCurFunction()->ErrorTrap.hasUnrecoverableErrorOccurred(); |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 1012 | } |
| 1013 | |
| 1014 | BlockScopeInfo *Sema::getCurBlock() { |
| 1015 | if (FunctionScopes.empty()) |
| 1016 | return 0; |
| 1017 | |
| 1018 | return dyn_cast<BlockScopeInfo>(FunctionScopes.back()); |
| 1019 | } |
John McCall | 76bd1f3 | 2010-06-01 09:23:16 +0000 | [diff] [blame] | 1020 | |
Eli Friedman | 906a7e1 | 2012-01-06 03:05:34 +0000 | [diff] [blame] | 1021 | LambdaScopeInfo *Sema::getCurLambda() { |
| 1022 | if (FunctionScopes.empty()) |
| 1023 | return 0; |
| 1024 | |
| 1025 | return dyn_cast<LambdaScopeInfo>(FunctionScopes.back()); |
| 1026 | } |
| 1027 | |
Dmitri Gribenko | aa0cd85 | 2012-06-20 00:34:58 +0000 | [diff] [blame] | 1028 | void Sema::ActOnComment(SourceRange Comment) { |
| 1029 | RawComment RC(SourceMgr, Comment); |
Dmitri Gribenko | 9dda474 | 2012-06-22 16:02:55 +0000 | [diff] [blame] | 1030 | if (RC.isAlmostTrailingComment()) { |
| 1031 | SourceRange MagicMarkerRange(Comment.getBegin(), |
| 1032 | Comment.getBegin().getLocWithOffset(3)); |
| 1033 | StringRef MagicMarkerText; |
| 1034 | switch (RC.getKind()) { |
Abramo Bagnara | c50a0e3 | 2012-07-04 07:30:26 +0000 | [diff] [blame] | 1035 | case RawComment::RCK_OrdinaryBCPL: |
Dmitri Gribenko | 9dda474 | 2012-06-22 16:02:55 +0000 | [diff] [blame] | 1036 | MagicMarkerText = "///<"; |
| 1037 | break; |
Abramo Bagnara | c50a0e3 | 2012-07-04 07:30:26 +0000 | [diff] [blame] | 1038 | case RawComment::RCK_OrdinaryC: |
Dmitri Gribenko | 9dda474 | 2012-06-22 16:02:55 +0000 | [diff] [blame] | 1039 | MagicMarkerText = "/**<"; |
| 1040 | break; |
| 1041 | default: |
| 1042 | llvm_unreachable("if this is an almost Doxygen comment, " |
| 1043 | "it should be ordinary"); |
| 1044 | } |
| 1045 | Diag(Comment.getBegin(), diag::warn_not_a_doxygen_trailing_member_comment) << |
| 1046 | FixItHint::CreateReplacement(MagicMarkerRange, MagicMarkerText); |
| 1047 | } |
Dmitri Gribenko | aa0cd85 | 2012-06-20 00:34:58 +0000 | [diff] [blame] | 1048 | Context.addComment(RC); |
| 1049 | } |
| 1050 | |
John McCall | 76bd1f3 | 2010-06-01 09:23:16 +0000 | [diff] [blame] | 1051 | // Pin this vtable to this file. |
| 1052 | ExternalSemaSource::~ExternalSemaSource() {} |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 1053 | |
Douglas Gregor | 5ac4b69 | 2012-01-25 00:49:42 +0000 | [diff] [blame] | 1054 | void ExternalSemaSource::ReadMethodPool(Selector Sel) { } |
Sebastian Redl | 8c84571 | 2010-09-28 20:23:00 +0000 | [diff] [blame] | 1055 | |
Douglas Gregor | d8bba9c | 2011-06-28 16:20:02 +0000 | [diff] [blame] | 1056 | void ExternalSemaSource::ReadKnownNamespaces( |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1057 | SmallVectorImpl<NamespaceDecl *> &Namespaces) { |
Douglas Gregor | d8bba9c | 2011-06-28 16:20:02 +0000 | [diff] [blame] | 1058 | } |
| 1059 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1060 | void PrettyDeclStackTraceEntry::print(raw_ostream &OS) const { |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 1061 | SourceLocation Loc = this->Loc; |
| 1062 | if (!Loc.isValid() && TheDecl) Loc = TheDecl->getLocation(); |
| 1063 | if (Loc.isValid()) { |
| 1064 | Loc.print(OS, S.getSourceManager()); |
| 1065 | OS << ": "; |
| 1066 | } |
| 1067 | OS << Message; |
| 1068 | |
| 1069 | if (TheDecl && isa<NamedDecl>(TheDecl)) { |
| 1070 | std::string Name = cast<NamedDecl>(TheDecl)->getNameAsString(); |
| 1071 | if (!Name.empty()) |
| 1072 | OS << " '" << Name << '\''; |
| 1073 | } |
| 1074 | |
| 1075 | OS << '\n'; |
| 1076 | } |
Matt Beaumont-Gay | c9366ba | 2011-05-04 22:10:40 +0000 | [diff] [blame] | 1077 | |
| 1078 | /// \brief Figure out if an expression could be turned into a call. |
| 1079 | /// |
| 1080 | /// Use this when trying to recover from an error where the programmer may have |
| 1081 | /// written just the name of a function instead of actually calling it. |
| 1082 | /// |
| 1083 | /// \param E - The expression to examine. |
| 1084 | /// \param ZeroArgCallReturnTy - If the expression can be turned into a call |
| 1085 | /// with no arguments, this parameter is set to the type returned by such a |
| 1086 | /// call; otherwise, it is set to an empty QualType. |
John McCall | 6dbba4f | 2011-10-11 23:14:30 +0000 | [diff] [blame] | 1087 | /// \param OverloadSet - If the expression is an overloaded function |
Matt Beaumont-Gay | c9366ba | 2011-05-04 22:10:40 +0000 | [diff] [blame] | 1088 | /// name, this parameter is populated with the decls of the various overloads. |
| 1089 | bool Sema::isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, |
John McCall | 6dbba4f | 2011-10-11 23:14:30 +0000 | [diff] [blame] | 1090 | UnresolvedSetImpl &OverloadSet) { |
Matt Beaumont-Gay | c9366ba | 2011-05-04 22:10:40 +0000 | [diff] [blame] | 1091 | ZeroArgCallReturnTy = QualType(); |
John McCall | 6dbba4f | 2011-10-11 23:14:30 +0000 | [diff] [blame] | 1092 | OverloadSet.clear(); |
| 1093 | |
| 1094 | if (E.getType() == Context.OverloadTy) { |
| 1095 | OverloadExpr::FindResult FR = OverloadExpr::find(const_cast<Expr*>(&E)); |
| 1096 | const OverloadExpr *Overloads = FR.Expression; |
| 1097 | |
Matt Beaumont-Gay | c9366ba | 2011-05-04 22:10:40 +0000 | [diff] [blame] | 1098 | for (OverloadExpr::decls_iterator it = Overloads->decls_begin(), |
| 1099 | DeclsEnd = Overloads->decls_end(); it != DeclsEnd; ++it) { |
John McCall | 6dbba4f | 2011-10-11 23:14:30 +0000 | [diff] [blame] | 1100 | OverloadSet.addDecl(*it); |
| 1101 | |
| 1102 | // Check whether the function is a non-template which takes no |
| 1103 | // arguments. |
| 1104 | if (const FunctionDecl *OverloadDecl |
| 1105 | = dyn_cast<FunctionDecl>((*it)->getUnderlyingDecl())) { |
Matt Beaumont-Gay | c9366ba | 2011-05-04 22:10:40 +0000 | [diff] [blame] | 1106 | if (OverloadDecl->getMinRequiredArguments() == 0) |
| 1107 | ZeroArgCallReturnTy = OverloadDecl->getResultType(); |
| 1108 | } |
| 1109 | } |
John McCall | 6dbba4f | 2011-10-11 23:14:30 +0000 | [diff] [blame] | 1110 | |
Douglas Gregor | 64a371f | 2011-10-13 18:26:27 +0000 | [diff] [blame] | 1111 | // Ignore overloads that are pointer-to-member constants. |
| 1112 | if (FR.HasFormOfMemberPointer) |
John McCall | 6dbba4f | 2011-10-11 23:14:30 +0000 | [diff] [blame] | 1113 | return false; |
| 1114 | |
Matt Beaumont-Gay | c9366ba | 2011-05-04 22:10:40 +0000 | [diff] [blame] | 1115 | return true; |
| 1116 | } |
| 1117 | |
John McCall | 6dbba4f | 2011-10-11 23:14:30 +0000 | [diff] [blame] | 1118 | if (const DeclRefExpr *DeclRef = dyn_cast<DeclRefExpr>(E.IgnoreParens())) { |
Matt Beaumont-Gay | c9366ba | 2011-05-04 22:10:40 +0000 | [diff] [blame] | 1119 | if (const FunctionDecl *Fun = dyn_cast<FunctionDecl>(DeclRef->getDecl())) { |
| 1120 | if (Fun->getMinRequiredArguments() == 0) |
| 1121 | ZeroArgCallReturnTy = Fun->getResultType(); |
| 1122 | return true; |
| 1123 | } |
| 1124 | } |
| 1125 | |
| 1126 | // We don't have an expression that's convenient to get a FunctionDecl from, |
| 1127 | // but we can at least check if the type is "function of 0 arguments". |
| 1128 | QualType ExprTy = E.getType(); |
| 1129 | const FunctionType *FunTy = NULL; |
Matt Beaumont-Gay | 9389ddc | 2011-05-05 00:59:35 +0000 | [diff] [blame] | 1130 | QualType PointeeTy = ExprTy->getPointeeType(); |
| 1131 | if (!PointeeTy.isNull()) |
| 1132 | FunTy = PointeeTy->getAs<FunctionType>(); |
Matt Beaumont-Gay | c9366ba | 2011-05-04 22:10:40 +0000 | [diff] [blame] | 1133 | if (!FunTy) |
| 1134 | FunTy = ExprTy->getAs<FunctionType>(); |
| 1135 | if (!FunTy && ExprTy == Context.BoundMemberTy) { |
| 1136 | // Look for the bound-member type. If it's still overloaded, give up, |
| 1137 | // although we probably should have fallen into the OverloadExpr case above |
| 1138 | // if we actually have an overloaded bound member. |
| 1139 | QualType BoundMemberTy = Expr::findBoundMemberType(&E); |
| 1140 | if (!BoundMemberTy.isNull()) |
| 1141 | FunTy = BoundMemberTy->castAs<FunctionType>(); |
| 1142 | } |
| 1143 | |
| 1144 | if (const FunctionProtoType *FPT = |
| 1145 | dyn_cast_or_null<FunctionProtoType>(FunTy)) { |
| 1146 | if (FPT->getNumArgs() == 0) |
| 1147 | ZeroArgCallReturnTy = FunTy->getResultType(); |
| 1148 | return true; |
| 1149 | } |
| 1150 | return false; |
| 1151 | } |
| 1152 | |
| 1153 | /// \brief Give notes for a set of overloads. |
| 1154 | /// |
| 1155 | /// A companion to isExprCallable. In cases when the name that the programmer |
| 1156 | /// wrote was an overloaded function, we may be able to make some guesses about |
| 1157 | /// plausible overloads based on their return types; such guesses can be handed |
| 1158 | /// off to this method to be emitted as notes. |
| 1159 | /// |
| 1160 | /// \param Overloads - The overloads to note. |
| 1161 | /// \param FinalNoteLoc - If we've suppressed printing some overloads due to |
| 1162 | /// -fshow-overloads=best, this is the location to attach to the note about too |
| 1163 | /// many candidates. Typically this will be the location of the original |
| 1164 | /// ill-formed expression. |
John McCall | 6dbba4f | 2011-10-11 23:14:30 +0000 | [diff] [blame] | 1165 | static void noteOverloads(Sema &S, const UnresolvedSetImpl &Overloads, |
| 1166 | const SourceLocation FinalNoteLoc) { |
Matt Beaumont-Gay | c9366ba | 2011-05-04 22:10:40 +0000 | [diff] [blame] | 1167 | int ShownOverloads = 0; |
| 1168 | int SuppressedOverloads = 0; |
| 1169 | for (UnresolvedSetImpl::iterator It = Overloads.begin(), |
| 1170 | DeclsEnd = Overloads.end(); It != DeclsEnd; ++It) { |
| 1171 | // FIXME: Magic number for max shown overloads stolen from |
| 1172 | // OverloadCandidateSet::NoteCandidates. |
| 1173 | if (ShownOverloads >= 4 && |
John McCall | 6dbba4f | 2011-10-11 23:14:30 +0000 | [diff] [blame] | 1174 | S.Diags.getShowOverloads() == DiagnosticsEngine::Ovl_Best) { |
Matt Beaumont-Gay | c9366ba | 2011-05-04 22:10:40 +0000 | [diff] [blame] | 1175 | ++SuppressedOverloads; |
| 1176 | continue; |
| 1177 | } |
John McCall | 6dbba4f | 2011-10-11 23:14:30 +0000 | [diff] [blame] | 1178 | |
| 1179 | NamedDecl *Fn = (*It)->getUnderlyingDecl(); |
Abramo Bagnara | 9c0e1ec | 2011-11-15 21:43:28 +0000 | [diff] [blame] | 1180 | S.Diag(Fn->getLocation(), diag::note_possible_target_of_call); |
Matt Beaumont-Gay | c9366ba | 2011-05-04 22:10:40 +0000 | [diff] [blame] | 1181 | ++ShownOverloads; |
| 1182 | } |
John McCall | 6dbba4f | 2011-10-11 23:14:30 +0000 | [diff] [blame] | 1183 | |
Matt Beaumont-Gay | c9366ba | 2011-05-04 22:10:40 +0000 | [diff] [blame] | 1184 | if (SuppressedOverloads) |
John McCall | 6dbba4f | 2011-10-11 23:14:30 +0000 | [diff] [blame] | 1185 | S.Diag(FinalNoteLoc, diag::note_ovl_too_many_candidates) |
| 1186 | << SuppressedOverloads; |
| 1187 | } |
| 1188 | |
| 1189 | static void notePlausibleOverloads(Sema &S, SourceLocation Loc, |
| 1190 | const UnresolvedSetImpl &Overloads, |
| 1191 | bool (*IsPlausibleResult)(QualType)) { |
| 1192 | if (!IsPlausibleResult) |
| 1193 | return noteOverloads(S, Overloads, Loc); |
| 1194 | |
| 1195 | UnresolvedSet<2> PlausibleOverloads; |
| 1196 | for (OverloadExpr::decls_iterator It = Overloads.begin(), |
| 1197 | DeclsEnd = Overloads.end(); It != DeclsEnd; ++It) { |
| 1198 | const FunctionDecl *OverloadDecl = cast<FunctionDecl>(*It); |
| 1199 | QualType OverloadResultTy = OverloadDecl->getResultType(); |
| 1200 | if (IsPlausibleResult(OverloadResultTy)) |
| 1201 | PlausibleOverloads.addDecl(It.getDecl()); |
| 1202 | } |
| 1203 | noteOverloads(S, PlausibleOverloads, Loc); |
| 1204 | } |
| 1205 | |
| 1206 | /// Determine whether the given expression can be called by just |
| 1207 | /// putting parentheses after it. Notably, expressions with unary |
| 1208 | /// operators can't be because the unary operator will start parsing |
| 1209 | /// outside the call. |
| 1210 | static bool IsCallableWithAppend(Expr *E) { |
| 1211 | E = E->IgnoreImplicit(); |
| 1212 | return (!isa<CStyleCastExpr>(E) && |
| 1213 | !isa<UnaryOperator>(E) && |
| 1214 | !isa<BinaryOperator>(E) && |
| 1215 | !isa<CXXOperatorCallExpr>(E)); |
| 1216 | } |
| 1217 | |
| 1218 | bool Sema::tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD, |
| 1219 | bool ForceComplain, |
| 1220 | bool (*IsPlausibleResult)(QualType)) { |
| 1221 | SourceLocation Loc = E.get()->getExprLoc(); |
| 1222 | SourceRange Range = E.get()->getSourceRange(); |
| 1223 | |
| 1224 | QualType ZeroArgCallTy; |
| 1225 | UnresolvedSet<4> Overloads; |
| 1226 | if (isExprCallable(*E.get(), ZeroArgCallTy, Overloads) && |
| 1227 | !ZeroArgCallTy.isNull() && |
| 1228 | (!IsPlausibleResult || IsPlausibleResult(ZeroArgCallTy))) { |
| 1229 | // At this point, we know E is potentially callable with 0 |
| 1230 | // arguments and that it returns something of a reasonable type, |
| 1231 | // so we can emit a fixit and carry on pretending that E was |
| 1232 | // actually a CallExpr. |
| 1233 | SourceLocation ParenInsertionLoc = |
| 1234 | PP.getLocForEndOfToken(Range.getEnd()); |
| 1235 | Diag(Loc, PD) |
| 1236 | << /*zero-arg*/ 1 << Range |
| 1237 | << (IsCallableWithAppend(E.get()) |
| 1238 | ? FixItHint::CreateInsertion(ParenInsertionLoc, "()") |
| 1239 | : FixItHint()); |
| 1240 | notePlausibleOverloads(*this, Loc, Overloads, IsPlausibleResult); |
| 1241 | |
| 1242 | // FIXME: Try this before emitting the fixit, and suppress diagnostics |
| 1243 | // while doing so. |
| 1244 | E = ActOnCallExpr(0, E.take(), ParenInsertionLoc, |
| 1245 | MultiExprArg(*this, 0, 0), |
| 1246 | ParenInsertionLoc.getLocWithOffset(1)); |
| 1247 | return true; |
| 1248 | } |
| 1249 | |
| 1250 | if (!ForceComplain) return false; |
| 1251 | |
| 1252 | Diag(Loc, PD) << /*not zero-arg*/ 0 << Range; |
| 1253 | notePlausibleOverloads(*this, Loc, Overloads, IsPlausibleResult); |
| 1254 | E = ExprError(); |
| 1255 | return true; |
Matt Beaumont-Gay | c9366ba | 2011-05-04 22:10:40 +0000 | [diff] [blame] | 1256 | } |