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 Dunbar | c4a1dea | 2008-08-11 05:35:13 +0000 | [diff] [blame] | 33 | #include "clang/AST/DeclObjC.h" |
Daniel Dunbar | e91593e | 2008-08-11 04:54:23 +0000 | [diff] [blame] | 34 | #include "clang/AST/Expr.h" |
Matt Beaumont-Gay | c9366ba | 2011-05-04 22:10:40 +0000 | [diff] [blame] | 35 | #include "clang/AST/ExprCXX.h" |
Chris Lattner | ad8dcf4 | 2011-02-17 07:39:24 +0000 | [diff] [blame] | 36 | #include "clang/AST/StmtCXX.h" |
Douglas Gregor | 90db260 | 2011-12-02 01:47:07 +0000 | [diff] [blame] | 37 | #include "clang/Lex/HeaderSearch.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 38 | #include "clang/Lex/Preprocessor.h" |
Douglas Gregor | f7572a6 | 2011-09-20 18:13:03 +0000 | [diff] [blame] | 39 | #include "clang/Basic/FileManager.h" |
Anders Carlsson | 91a0cc9 | 2009-08-26 22:33:56 +0000 | [diff] [blame] | 40 | #include "clang/Basic/PartialDiagnostic.h" |
Chris Lattner | 4d150c8 | 2009-04-30 06:18:40 +0000 | [diff] [blame] | 41 | #include "clang/Basic/TargetInfo.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 42 | using namespace clang; |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 43 | using namespace sema; |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 44 | |
| 45 | FunctionScopeInfo::~FunctionScopeInfo() { } |
| 46 | |
Argyrios Kyrtzidis | 8fc32d2 | 2010-11-19 00:19:15 +0000 | [diff] [blame] | 47 | void FunctionScopeInfo::Clear() { |
John McCall | b60a77e | 2010-08-01 00:26:45 +0000 | [diff] [blame] | 48 | HasBranchProtectedScope = false; |
| 49 | HasBranchIntoScope = false; |
| 50 | HasIndirectGoto = false; |
| 51 | |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 52 | SwitchStack.clear(); |
Douglas Gregor | 5077c38 | 2010-05-15 06:01:05 +0000 | [diff] [blame] | 53 | Returns.clear(); |
Argyrios Kyrtzidis | 8fc32d2 | 2010-11-19 00:19:15 +0000 | [diff] [blame] | 54 | ErrorTrap.reset(); |
Ted Kremenek | 351ba91 | 2011-02-23 01:52:04 +0000 | [diff] [blame] | 55 | PossiblyUnreachableDiags.clear(); |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 56 | } |
| 57 | |
| 58 | BlockScopeInfo::~BlockScopeInfo() { } |
Eli Friedman | ec9ea72 | 2012-01-05 03:35:19 +0000 | [diff] [blame] | 59 | LambdaScopeInfo::~LambdaScopeInfo() { } |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 60 | |
Argyrios Kyrtzidis | ea8c59a | 2012-01-17 02:15:51 +0000 | [diff] [blame] | 61 | PrintingPolicy Sema::getPrintingPolicy(const ASTContext &Context, |
| 62 | const Preprocessor &PP) { |
Douglas Gregor | 8987b23 | 2011-09-27 23:30:47 +0000 | [diff] [blame] | 63 | PrintingPolicy Policy = Context.getPrintingPolicy(); |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 64 | Policy.Bool = Context.getLangOpts().Bool; |
Douglas Gregor | 8987b23 | 2011-09-27 23:30:47 +0000 | [diff] [blame] | 65 | if (!Policy.Bool) { |
| 66 | if (MacroInfo *BoolMacro = PP.getMacroInfo(&Context.Idents.get("bool"))) { |
| 67 | Policy.Bool = BoolMacro->isObjectLike() && |
| 68 | BoolMacro->getNumTokens() == 1 && |
| 69 | BoolMacro->getReplacementToken(0).is(tok::kw__Bool); |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | return Policy; |
| 74 | } |
| 75 | |
Douglas Gregor | c1a3e5e | 2010-08-25 18:07:12 +0000 | [diff] [blame] | 76 | void Sema::ActOnTranslationUnitScope(Scope *S) { |
Steve Naroff | b216c88 | 2007-10-09 22:01:59 +0000 | [diff] [blame] | 77 | TUScope = S; |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 78 | PushDeclContext(S, Context.getTranslationUnitDecl()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 79 | |
John McCall | c7e04da | 2010-05-28 18:45:08 +0000 | [diff] [blame] | 80 | VAListTagName = PP.getIdentifierInfo("__va_list_tag"); |
Steve Naroff | 3b95017 | 2007-10-10 21:53:07 +0000 | [diff] [blame] | 81 | } |
| 82 | |
Douglas Gregor | f807fe0 | 2009-04-14 16:27:31 +0000 | [diff] [blame] | 83 | Sema::Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, |
Douglas Gregor | 467dc88 | 2011-08-25 22:30:56 +0000 | [diff] [blame] | 84 | TranslationUnitKind TUKind, |
Daniel Dunbar | 3a2838d | 2009-11-13 08:58:20 +0000 | [diff] [blame] | 85 | CodeCompleteConsumer *CodeCompleter) |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 86 | : TheTargetAttributesSema(0), FPFeatures(pp.getLangOpts()), |
| 87 | LangOpts(pp.getLangOpts()), PP(pp), Context(ctxt), Consumer(consumer), |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 88 | Diags(PP.getDiagnostics()), SourceMgr(PP.getSourceManager()), |
Chandler Carruth | 5d98994 | 2011-07-06 16:21:37 +0000 | [diff] [blame] | 89 | CollectStats(false), ExternalSource(0), CodeCompleter(CodeCompleter), |
Argyrios Kyrtzidis | 3a38744 | 2011-10-06 23:23:20 +0000 | [diff] [blame] | 90 | CurContext(0), OriginalLexicalContext(0), |
| 91 | PackContext(0), MSStructPragmaOn(false), VisContext(0), |
John McCall | 80ee6e8 | 2011-11-10 05:35:25 +0000 | [diff] [blame] | 92 | ExprNeedsCleanups(false), LateTemplateParser(0), OpaqueParser(0), |
Sebastian Redl | 395e04d | 2012-01-17 22:49:33 +0000 | [diff] [blame] | 93 | IdResolver(pp), StdInitializerList(0), CXXTypeInfoDecl(0), MSVCGuidDecl(0), |
Benjamin Kramer | 471131a | 2012-04-22 20:43:35 +0000 | [diff] [blame] | 94 | NSNumberDecl(0), |
| 95 | NSStringDecl(0), StringWithUTF8StringMethod(0), |
| 96 | NSArrayDecl(0), ArrayWithObjectsMethod(0), |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 97 | NSDictionaryDecl(0), DictionaryWithObjectsMethod(0), |
Bill Wendling | b7566d8 | 2010-09-08 21:30:16 +0000 | [diff] [blame] | 98 | GlobalNewDeleteDeclared(false), |
Nico Weber | 9a1ecf0 | 2011-08-22 17:25:57 +0000 | [diff] [blame] | 99 | ObjCShouldCallSuperDealloc(false), |
Nico Weber | 80cb6e6 | 2011-08-28 22:35:17 +0000 | [diff] [blame] | 100 | ObjCShouldCallSuperFinalize(false), |
Douglas Gregor | 467dc88 | 2011-08-25 22:30:56 +0000 | [diff] [blame] | 101 | TUKind(TUKind), |
James Molloy | 16f1f71 | 2012-02-29 10:24:19 +0000 | [diff] [blame] | 102 | NumSFINAEErrors(0), InFunctionDeclarator(0), SuppressAccessChecking(false), |
Douglas Gregor | 1eee5dc | 2011-01-27 22:31:44 +0000 | [diff] [blame] | 103 | AccessCheckingSFINAE(false), InNonInstantiationSFINAEContext(false), |
Douglas Gregor | 8491ffe | 2010-12-20 22:05:00 +0000 | [diff] [blame] | 104 | NonInstantiationEntries(0), ArgumentPackSubstitutionIndex(-1), |
| 105 | CurrentInstantiationScope(0), TyposCorrected(0), |
Bill Wendling | b7566d8 | 2010-09-08 21:30:16 +0000 | [diff] [blame] | 106 | AnalysisWarnings(*this) |
Douglas Gregor | f35f828 | 2009-11-11 21:54:23 +0000 | [diff] [blame] | 107 | { |
Steve Naroff | 3b95017 | 2007-10-10 21:53:07 +0000 | [diff] [blame] | 108 | TUScope = 0; |
Douglas Gregor | cefc3af | 2012-04-16 07:05:22 +0000 | [diff] [blame] | 109 | |
Douglas Gregor | d8bba9c | 2011-06-28 16:20:02 +0000 | [diff] [blame] | 110 | LoadedExternalKnownNamespaces = false; |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 111 | for (unsigned I = 0; I != NSAPI::NumNSNumberLiteralMethods; ++I) |
| 112 | NSNumberLiteralMethods[I] = 0; |
| 113 | |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 114 | if (getLangOpts().ObjC1) |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 115 | NSAPIObj.reset(new NSAPI(Context)); |
| 116 | |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 117 | if (getLangOpts().CPlusPlus) |
Argyrios Kyrtzidis | 0795232 | 2008-07-01 10:37:29 +0000 | [diff] [blame] | 118 | FieldCollector.reset(new CXXFieldCollector()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 119 | |
Chris Lattner | 22caddc | 2008-11-23 09:13:29 +0000 | [diff] [blame] | 120 | // Tell diagnostics how to render things from the AST library. |
Douglas Gregor | 79a9a34 | 2010-02-09 22:26:47 +0000 | [diff] [blame] | 121 | PP.getDiagnostics().SetArgToStringFn(&FormatASTNodeDiagnosticArgument, |
| 122 | &Context); |
Douglas Gregor | 2afce72 | 2009-11-26 00:44:06 +0000 | [diff] [blame] | 123 | |
| 124 | ExprEvalContexts.push_back( |
Richard Smith | 76f3f69 | 2012-02-22 02:04:18 +0000 | [diff] [blame] | 125 | ExpressionEvaluationContextRecord(PotentiallyEvaluated, 0, |
| 126 | false, 0, false)); |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 127 | |
Argyrios Kyrtzidis | 8fc32d2 | 2010-11-19 00:19:15 +0000 | [diff] [blame] | 128 | FunctionScopes.push_back(new FunctionScopeInfo(Diags)); |
Douglas Gregor | 46ea32a | 2010-08-12 22:51:45 +0000 | [diff] [blame] | 129 | } |
| 130 | |
| 131 | void Sema::Initialize() { |
| 132 | // Tell the AST consumer about this Sema object. |
| 133 | Consumer.Initialize(Context); |
| 134 | |
| 135 | // FIXME: Isn't this redundant with the initialization above? |
| 136 | if (SemaConsumer *SC = dyn_cast<SemaConsumer>(&Consumer)) |
| 137 | SC->InitializeSema(*this); |
| 138 | |
| 139 | // Tell the external Sema source about this Sema object. |
| 140 | if (ExternalSemaSource *ExternalSema |
| 141 | = dyn_cast_or_null<ExternalSemaSource>(Context.getExternalSource())) |
| 142 | ExternalSema->InitializeSema(*this); |
Douglas Gregor | 4dfd02a | 2011-08-12 05:46:01 +0000 | [diff] [blame] | 143 | |
Douglas Gregor | 772eeae | 2011-08-12 06:49:56 +0000 | [diff] [blame] | 144 | // Initialize predefined 128-bit integer types, if needed. |
| 145 | if (PP.getTargetInfo().getPointerWidth(0) >= 64) { |
| 146 | // If either of the 128-bit integer types are unavailable to name lookup, |
| 147 | // define them now. |
| 148 | DeclarationName Int128 = &Context.Idents.get("__int128_t"); |
Douglas Gregor | eee242f | 2011-10-27 09:33:13 +0000 | [diff] [blame] | 149 | if (IdResolver.begin(Int128) == IdResolver.end()) |
Douglas Gregor | 772eeae | 2011-08-12 06:49:56 +0000 | [diff] [blame] | 150 | PushOnScopeChains(Context.getInt128Decl(), TUScope); |
| 151 | |
| 152 | DeclarationName UInt128 = &Context.Idents.get("__uint128_t"); |
Douglas Gregor | eee242f | 2011-10-27 09:33:13 +0000 | [diff] [blame] | 153 | if (IdResolver.begin(UInt128) == IdResolver.end()) |
Douglas Gregor | 772eeae | 2011-08-12 06:49:56 +0000 | [diff] [blame] | 154 | PushOnScopeChains(Context.getUInt128Decl(), TUScope); |
| 155 | } |
| 156 | |
| 157 | |
Douglas Gregor | 4dfd02a | 2011-08-12 05:46:01 +0000 | [diff] [blame] | 158 | // Initialize predefined Objective-C types: |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 159 | if (PP.getLangOpts().ObjC1) { |
Douglas Gregor | 7a27ea5 | 2011-08-12 06:17:30 +0000 | [diff] [blame] | 160 | // If 'SEL' does not yet refer to any declarations, make it refer to the |
| 161 | // predefined 'SEL'. |
| 162 | DeclarationName SEL = &Context.Idents.get("SEL"); |
Douglas Gregor | eee242f | 2011-10-27 09:33:13 +0000 | [diff] [blame] | 163 | if (IdResolver.begin(SEL) == IdResolver.end()) |
Douglas Gregor | 7a27ea5 | 2011-08-12 06:17:30 +0000 | [diff] [blame] | 164 | PushOnScopeChains(Context.getObjCSelDecl(), TUScope); |
| 165 | |
Douglas Gregor | 4dfd02a | 2011-08-12 05:46:01 +0000 | [diff] [blame] | 166 | // If 'id' does not yet refer to any declarations, make it refer to the |
| 167 | // predefined 'id'. |
| 168 | DeclarationName Id = &Context.Idents.get("id"); |
Douglas Gregor | eee242f | 2011-10-27 09:33:13 +0000 | [diff] [blame] | 169 | if (IdResolver.begin(Id) == IdResolver.end()) |
Douglas Gregor | 4dfd02a | 2011-08-12 05:46:01 +0000 | [diff] [blame] | 170 | PushOnScopeChains(Context.getObjCIdDecl(), TUScope); |
Douglas Gregor | 79d6726 | 2011-08-12 05:59:41 +0000 | [diff] [blame] | 171 | |
| 172 | // Create the built-in typedef for 'Class'. |
| 173 | DeclarationName Class = &Context.Idents.get("Class"); |
Douglas Gregor | eee242f | 2011-10-27 09:33:13 +0000 | [diff] [blame] | 174 | if (IdResolver.begin(Class) == IdResolver.end()) |
Douglas Gregor | 79d6726 | 2011-08-12 05:59:41 +0000 | [diff] [blame] | 175 | PushOnScopeChains(Context.getObjCClassDecl(), TUScope); |
Douglas Gregor | a6ea10e | 2012-01-17 18:09:05 +0000 | [diff] [blame] | 176 | |
| 177 | // Create the built-in forward declaratino for 'Protocol'. |
| 178 | DeclarationName Protocol = &Context.Idents.get("Protocol"); |
| 179 | if (IdResolver.begin(Protocol) == IdResolver.end()) |
| 180 | PushOnScopeChains(Context.getObjCProtocolDecl(), TUScope); |
Douglas Gregor | 4dfd02a | 2011-08-12 05:46:01 +0000 | [diff] [blame] | 181 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 182 | } |
| 183 | |
Anton Korobeynikov | 82d0a41 | 2010-01-10 12:58:08 +0000 | [diff] [blame] | 184 | Sema::~Sema() { |
| 185 | if (PackContext) FreePackedContext(); |
Eli Friedman | aa8b0d1 | 2010-08-05 06:57:20 +0000 | [diff] [blame] | 186 | if (VisContext) FreeVisContext(); |
Anton Korobeynikov | 82d0a41 | 2010-01-10 12:58:08 +0000 | [diff] [blame] | 187 | delete TheTargetAttributesSema; |
Fariborz Jahanian | 62c9258 | 2011-04-25 18:49:15 +0000 | [diff] [blame] | 188 | MSStructPragmaOn = false; |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 189 | // Kill all the active scopes. |
| 190 | for (unsigned I = 1, E = FunctionScopes.size(); I != E; ++I) |
| 191 | delete FunctionScopes[I]; |
| 192 | if (FunctionScopes.size() == 1) |
| 193 | delete FunctionScopes[0]; |
Douglas Gregor | 46ea32a | 2010-08-12 22:51:45 +0000 | [diff] [blame] | 194 | |
| 195 | // Tell the SemaConsumer to forget about us; we're going out of scope. |
| 196 | if (SemaConsumer *SC = dyn_cast<SemaConsumer>(&Consumer)) |
| 197 | SC->ForgetSema(); |
| 198 | |
| 199 | // Detach from the external Sema source. |
| 200 | if (ExternalSemaSource *ExternalSema |
Douglas Gregor | 914ed9d | 2010-08-13 03:15:25 +0000 | [diff] [blame] | 201 | = dyn_cast_or_null<ExternalSemaSource>(Context.getExternalSource())) |
Douglas Gregor | 46ea32a | 2010-08-12 22:51:45 +0000 | [diff] [blame] | 202 | ExternalSema->ForgetSema(); |
Anton Korobeynikov | 82d0a41 | 2010-01-10 12:58:08 +0000 | [diff] [blame] | 203 | } |
| 204 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 205 | /// makeUnavailableInSystemHeader - There is an error in the current |
| 206 | /// context. If we're still in a system header, and we can plausibly |
| 207 | /// make the relevant declaration unavailable instead of erroring, do |
| 208 | /// so and return true. |
| 209 | bool Sema::makeUnavailableInSystemHeader(SourceLocation loc, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 210 | StringRef msg) { |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 211 | // If we're not in a function, it's an error. |
| 212 | FunctionDecl *fn = dyn_cast<FunctionDecl>(CurContext); |
| 213 | if (!fn) return false; |
| 214 | |
| 215 | // If we're in template instantiation, it's an error. |
| 216 | if (!ActiveTemplateInstantiations.empty()) |
| 217 | return false; |
| 218 | |
| 219 | // If that function's not in a system header, it's an error. |
| 220 | if (!Context.getSourceManager().isInSystemHeader(loc)) |
| 221 | return false; |
| 222 | |
| 223 | // If the function is already unavailable, it's not an error. |
| 224 | if (fn->hasAttr<UnavailableAttr>()) return true; |
| 225 | |
| 226 | fn->addAttr(new (Context) UnavailableAttr(loc, Context, msg)); |
| 227 | return true; |
| 228 | } |
| 229 | |
Sebastian Redl | 58a2cd8 | 2011-04-24 16:28:06 +0000 | [diff] [blame] | 230 | ASTMutationListener *Sema::getASTMutationListener() const { |
| 231 | return getASTConsumer().GetASTMutationListener(); |
| 232 | } |
| 233 | |
Chandler Carruth | 5d98994 | 2011-07-06 16:21:37 +0000 | [diff] [blame] | 234 | /// \brief Print out statistics about the semantic analysis. |
| 235 | void Sema::PrintStats() const { |
| 236 | llvm::errs() << "\n*** Semantic Analysis Stats:\n"; |
| 237 | llvm::errs() << NumSFINAEErrors << " SFINAE diagnostics trapped.\n"; |
| 238 | |
| 239 | BumpAlloc.PrintStats(); |
| 240 | AnalysisWarnings.PrintStats(); |
| 241 | } |
| 242 | |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 243 | /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit cast. |
| 244 | /// If there is already an implicit cast, merge into the existing one. |
| 245 | /// The result is of the given category. |
| 246 | ExprResult Sema::ImpCastExprToType(Expr *E, QualType Ty, |
| 247 | CastKind Kind, ExprValueKind VK, |
| 248 | const CXXCastPath *BasePath, |
| 249 | CheckedConversionKind CCK) { |
Richard Smith | 9c129f8 | 2011-10-28 03:31:48 +0000 | [diff] [blame] | 250 | #ifndef NDEBUG |
| 251 | if (VK == VK_RValue && !E->isRValue()) { |
| 252 | switch (Kind) { |
| 253 | default: |
| 254 | assert(0 && "can't implicitly cast lvalue to rvalue with this cast kind"); |
| 255 | case CK_LValueToRValue: |
| 256 | case CK_ArrayToPointerDecay: |
| 257 | case CK_FunctionToPointerDecay: |
| 258 | case CK_ToVoid: |
| 259 | break; |
| 260 | } |
| 261 | } |
Richard Smith | acdfa4d | 2011-11-10 23:32:36 +0000 | [diff] [blame] | 262 | assert((VK == VK_RValue || !E->isRValue()) && "can't cast rvalue to lvalue"); |
Richard Smith | 9c129f8 | 2011-10-28 03:31:48 +0000 | [diff] [blame] | 263 | #endif |
| 264 | |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 265 | QualType ExprTy = Context.getCanonicalType(E->getType()); |
Mon P Wang | 3a2c744 | 2008-09-04 08:38:01 +0000 | [diff] [blame] | 266 | QualType TypeTy = Context.getCanonicalType(Ty); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 267 | |
Mon P Wang | 3a2c744 | 2008-09-04 08:38:01 +0000 | [diff] [blame] | 268 | if (ExprTy == TypeTy) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 269 | return Owned(E); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 270 | |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 271 | if (getLangOpts().ObjCAutoRefCount) |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 272 | CheckObjCARCConversion(SourceRange(), Ty, E, CCK); |
| 273 | |
Douglas Gregor | 6fb745b | 2010-05-13 16:44:06 +0000 | [diff] [blame] | 274 | // If this is a derived-to-base cast to a through a virtual base, we |
| 275 | // need a vtable. |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 276 | if (Kind == CK_DerivedToBase && |
John McCall | f871d0c | 2010-08-07 06:22:56 +0000 | [diff] [blame] | 277 | BasePathInvolvesVirtualBase(*BasePath)) { |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 278 | QualType T = E->getType(); |
Douglas Gregor | 6fb745b | 2010-05-13 16:44:06 +0000 | [diff] [blame] | 279 | if (const PointerType *Pointer = T->getAs<PointerType>()) |
| 280 | T = Pointer->getPointeeType(); |
| 281 | if (const RecordType *RecordTy = T->getAs<RecordType>()) |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 282 | MarkVTableUsed(E->getLocStart(), |
Douglas Gregor | 6fb745b | 2010-05-13 16:44:06 +0000 | [diff] [blame] | 283 | cast<CXXRecordDecl>(RecordTy->getDecl())); |
| 284 | } |
Anders Carlsson | 4c5fad3 | 2009-09-15 05:28:24 +0000 | [diff] [blame] | 285 | |
Richard Smith | c8d7f58 | 2011-11-29 22:48:16 +0000 | [diff] [blame] | 286 | if (ImplicitCastExpr *ImpCast = dyn_cast<ImplicitCastExpr>(E)) { |
| 287 | if (ImpCast->getCastKind() == Kind && (!BasePath || BasePath->empty())) { |
| 288 | ImpCast->setType(Ty); |
| 289 | ImpCast->setValueKind(VK); |
| 290 | return Owned(E); |
| 291 | } |
| 292 | } |
| 293 | |
| 294 | return Owned(ImplicitCastExpr::Create(Context, Ty, Kind, E, BasePath, VK)); |
Sebastian Redl | 906082e | 2010-07-20 04:20:21 +0000 | [diff] [blame] | 295 | } |
| 296 | |
Abramo Bagnara | 737d544 | 2011-04-07 09:26:19 +0000 | [diff] [blame] | 297 | /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding |
| 298 | /// to the conversion from scalar type ScalarTy to the Boolean type. |
| 299 | CastKind Sema::ScalarTypeToBooleanCastKind(QualType ScalarTy) { |
| 300 | switch (ScalarTy->getScalarTypeKind()) { |
| 301 | case Type::STK_Bool: return CK_NoOp; |
John McCall | 1d9b3b2 | 2011-09-09 05:25:32 +0000 | [diff] [blame] | 302 | case Type::STK_CPointer: return CK_PointerToBoolean; |
| 303 | case Type::STK_BlockPointer: return CK_PointerToBoolean; |
| 304 | case Type::STK_ObjCObjectPointer: return CK_PointerToBoolean; |
Abramo Bagnara | 737d544 | 2011-04-07 09:26:19 +0000 | [diff] [blame] | 305 | case Type::STK_MemberPointer: return CK_MemberPointerToBoolean; |
| 306 | case Type::STK_Integral: return CK_IntegralToBoolean; |
| 307 | case Type::STK_Floating: return CK_FloatingToBoolean; |
| 308 | case Type::STK_IntegralComplex: return CK_IntegralComplexToBoolean; |
| 309 | case Type::STK_FloatingComplex: return CK_FloatingComplexToBoolean; |
| 310 | } |
| 311 | return CK_Invalid; |
| 312 | } |
| 313 | |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 314 | /// \brief Used to prune the decls of Sema's UnusedFileScopedDecls vector. |
| 315 | static bool ShouldRemoveFromUnused(Sema *SemaRef, const DeclaratorDecl *D) { |
| 316 | if (D->isUsed()) |
| 317 | return true; |
| 318 | |
| 319 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { |
| 320 | // UnusedFileScopedDecls stores the first declaration. |
| 321 | // The declaration may have become definition so check again. |
| 322 | const FunctionDecl *DeclToCheck; |
| 323 | if (FD->hasBody(DeclToCheck)) |
| 324 | return !SemaRef->ShouldWarnIfUnusedFileScopedDecl(DeclToCheck); |
| 325 | |
| 326 | // Later redecls may add new information resulting in not having to warn, |
| 327 | // so check again. |
Douglas Gregor | ef96ee0 | 2012-01-14 16:38:05 +0000 | [diff] [blame] | 328 | DeclToCheck = FD->getMostRecentDecl(); |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 329 | if (DeclToCheck != FD) |
| 330 | return !SemaRef->ShouldWarnIfUnusedFileScopedDecl(DeclToCheck); |
| 331 | } |
| 332 | |
| 333 | if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { |
| 334 | // UnusedFileScopedDecls stores the first declaration. |
| 335 | // The declaration may have become definition so check again. |
| 336 | const VarDecl *DeclToCheck = VD->getDefinition(); |
| 337 | if (DeclToCheck) |
| 338 | return !SemaRef->ShouldWarnIfUnusedFileScopedDecl(DeclToCheck); |
| 339 | |
| 340 | // Later redecls may add new information resulting in not having to warn, |
| 341 | // so check again. |
Douglas Gregor | ef96ee0 | 2012-01-14 16:38:05 +0000 | [diff] [blame] | 342 | DeclToCheck = VD->getMostRecentDecl(); |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 343 | if (DeclToCheck != VD) |
| 344 | return !SemaRef->ShouldWarnIfUnusedFileScopedDecl(DeclToCheck); |
| 345 | } |
| 346 | |
| 347 | return false; |
| 348 | } |
| 349 | |
John McCall | 15e310a | 2011-02-19 02:53:41 +0000 | [diff] [blame] | 350 | namespace { |
| 351 | struct UndefinedInternal { |
| 352 | NamedDecl *decl; |
| 353 | FullSourceLoc useLoc; |
| 354 | |
| 355 | UndefinedInternal(NamedDecl *decl, FullSourceLoc useLoc) |
| 356 | : decl(decl), useLoc(useLoc) {} |
| 357 | }; |
| 358 | |
| 359 | bool operator<(const UndefinedInternal &l, const UndefinedInternal &r) { |
| 360 | return l.useLoc.isBeforeInTranslationUnitThan(r.useLoc); |
| 361 | } |
| 362 | } |
| 363 | |
| 364 | /// checkUndefinedInternals - Check for undefined objects with internal linkage. |
| 365 | static void checkUndefinedInternals(Sema &S) { |
| 366 | if (S.UndefinedInternals.empty()) return; |
| 367 | |
| 368 | // Collect all the still-undefined entities with internal linkage. |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 369 | SmallVector<UndefinedInternal, 16> undefined; |
John McCall | 15e310a | 2011-02-19 02:53:41 +0000 | [diff] [blame] | 370 | for (llvm::DenseMap<NamedDecl*,SourceLocation>::iterator |
| 371 | i = S.UndefinedInternals.begin(), e = S.UndefinedInternals.end(); |
| 372 | i != e; ++i) { |
| 373 | NamedDecl *decl = i->first; |
| 374 | |
| 375 | // Ignore attributes that have become invalid. |
| 376 | if (decl->isInvalidDecl()) continue; |
| 377 | |
| 378 | // __attribute__((weakref)) is basically a definition. |
| 379 | if (decl->hasAttr<WeakRefAttr>()) continue; |
| 380 | |
| 381 | if (FunctionDecl *fn = dyn_cast<FunctionDecl>(decl)) { |
| 382 | if (fn->isPure() || fn->hasBody()) |
| 383 | continue; |
| 384 | } else { |
| 385 | if (cast<VarDecl>(decl)->hasDefinition() != VarDecl::DeclarationOnly) |
| 386 | continue; |
| 387 | } |
| 388 | |
| 389 | // We build a FullSourceLoc so that we can sort with array_pod_sort. |
| 390 | FullSourceLoc loc(i->second, S.Context.getSourceManager()); |
| 391 | undefined.push_back(UndefinedInternal(decl, loc)); |
| 392 | } |
| 393 | |
| 394 | if (undefined.empty()) return; |
| 395 | |
| 396 | // Sort (in order of use site) so that we're not (as) dependent on |
| 397 | // the iteration order through an llvm::DenseMap. |
| 398 | llvm::array_pod_sort(undefined.begin(), undefined.end()); |
| 399 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 400 | for (SmallVectorImpl<UndefinedInternal>::iterator |
John McCall | 15e310a | 2011-02-19 02:53:41 +0000 | [diff] [blame] | 401 | i = undefined.begin(), e = undefined.end(); i != e; ++i) { |
| 402 | NamedDecl *decl = i->decl; |
| 403 | S.Diag(decl->getLocation(), diag::warn_undefined_internal) |
| 404 | << isa<VarDecl>(decl) << decl; |
| 405 | S.Diag(i->useLoc, diag::note_used_here); |
| 406 | } |
| 407 | } |
| 408 | |
Douglas Gregor | 31e37b2 | 2011-07-28 18:09:57 +0000 | [diff] [blame] | 409 | void Sema::LoadExternalWeakUndeclaredIdentifiers() { |
| 410 | if (!ExternalSource) |
| 411 | return; |
| 412 | |
| 413 | SmallVector<std::pair<IdentifierInfo *, WeakInfo>, 4> WeakIDs; |
| 414 | ExternalSource->ReadWeakUndeclaredIdentifiers(WeakIDs); |
| 415 | for (unsigned I = 0, N = WeakIDs.size(); I != N; ++I) { |
| 416 | llvm::DenseMap<IdentifierInfo*,WeakInfo>::iterator Pos |
| 417 | = WeakUndeclaredIdentifiers.find(WeakIDs[I].first); |
| 418 | if (Pos != WeakUndeclaredIdentifiers.end()) |
| 419 | continue; |
| 420 | |
| 421 | WeakUndeclaredIdentifiers.insert(WeakIDs[I]); |
| 422 | } |
| 423 | } |
| 424 | |
Chris Lattner | 9299f3f | 2008-08-23 03:19:52 +0000 | [diff] [blame] | 425 | /// ActOnEndOfTranslationUnit - This is called at the very end of the |
| 426 | /// translation unit when EOF is reached and all but the top-level scope is |
| 427 | /// popped. |
Argyrios Kyrtzidis | 0e03638 | 2010-08-05 09:48:16 +0000 | [diff] [blame] | 428 | void Sema::ActOnEndOfTranslationUnit() { |
John McCall | 9257664 | 2012-05-07 06:16:41 +0000 | [diff] [blame^] | 429 | assert(DelayedDiagnostics.getCurrentPool() == NULL |
| 430 | && "reached end of translation unit with a pool attached?"); |
| 431 | |
Douglas Gregor | 467dc88 | 2011-08-25 22:30:56 +0000 | [diff] [blame] | 432 | // Only complete translation units define vtables and perform implicit |
| 433 | // instantiations. |
| 434 | if (TUKind == TU_Complete) { |
Argyrios Kyrtzidis | 849639d | 2012-02-07 16:50:53 +0000 | [diff] [blame] | 435 | DiagnoseUseOfUnimplementedSelectors(); |
| 436 | |
Chandler Carruth | aee543a | 2010-12-12 21:36:11 +0000 | [diff] [blame] | 437 | // If any dynamic classes have their key function defined within |
| 438 | // this translation unit, then those vtables are considered "used" and must |
| 439 | // be emitted. |
Douglas Gregor | a126f17 | 2011-07-28 00:53:40 +0000 | [diff] [blame] | 440 | for (DynamicClassesType::iterator I = DynamicClasses.begin(ExternalSource), |
| 441 | E = DynamicClasses.end(); |
| 442 | I != E; ++I) { |
| 443 | assert(!(*I)->isDependentType() && |
Anders Carlsson | a5c6c2a | 2011-01-25 18:08:22 +0000 | [diff] [blame] | 444 | "Should not see dependent types here!"); |
Douglas Gregor | a126f17 | 2011-07-28 00:53:40 +0000 | [diff] [blame] | 445 | if (const CXXMethodDecl *KeyFunction = Context.getKeyFunction(*I)) { |
Chandler Carruth | aee543a | 2010-12-12 21:36:11 +0000 | [diff] [blame] | 446 | const FunctionDecl *Definition = 0; |
| 447 | if (KeyFunction->hasBody(Definition)) |
Douglas Gregor | a126f17 | 2011-07-28 00:53:40 +0000 | [diff] [blame] | 448 | MarkVTableUsed(Definition->getLocation(), *I, true); |
Chandler Carruth | aee543a | 2010-12-12 21:36:11 +0000 | [diff] [blame] | 449 | } |
| 450 | } |
| 451 | |
Nick Lewycky | 8155910 | 2011-05-31 07:58:42 +0000 | [diff] [blame] | 452 | // If DefinedUsedVTables ends up marking any virtual member functions it |
| 453 | // might lead to more pending template instantiations, which we then need |
| 454 | // to instantiate. |
| 455 | DefineUsedVTables(); |
Argyrios Kyrtzidis | 0e03638 | 2010-08-05 09:48:16 +0000 | [diff] [blame] | 456 | |
Nick Lewycky | 8155910 | 2011-05-31 07:58:42 +0000 | [diff] [blame] | 457 | // C++: Perform implicit template instantiations. |
| 458 | // |
| 459 | // FIXME: When we perform these implicit instantiations, we do not |
| 460 | // carefully keep track of the point of instantiation (C++ [temp.point]). |
| 461 | // This means that name lookup that occurs within the template |
| 462 | // instantiation will always happen at the end of the translation unit, |
| 463 | // so it will find some names that should not be found. Although this is |
| 464 | // common behavior for C++ compilers, it is technically wrong. In the |
| 465 | // future, we either need to be able to filter the results of name lookup |
| 466 | // or we need to perform template instantiations earlier. |
| 467 | PerformPendingInstantiations(); |
Nick Lewycky | 2a5f99e | 2010-11-25 00:35:20 +0000 | [diff] [blame] | 468 | } |
Anders Carlsson | d6a637f | 2009-12-07 08:24:59 +0000 | [diff] [blame] | 469 | |
Argyrios Kyrtzidis | 49b96d1 | 2010-08-13 18:42:17 +0000 | [diff] [blame] | 470 | // Remove file scoped decls that turned out to be used. |
Douglas Gregor | a2ee20a | 2011-07-27 21:45:57 +0000 | [diff] [blame] | 471 | UnusedFileScopedDecls.erase(std::remove_if(UnusedFileScopedDecls.begin(0, |
| 472 | true), |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 473 | UnusedFileScopedDecls.end(), |
| 474 | std::bind1st(std::ptr_fun(ShouldRemoveFromUnused), |
| 475 | this)), |
Argyrios Kyrtzidis | 49b96d1 | 2010-08-13 18:42:17 +0000 | [diff] [blame] | 476 | UnusedFileScopedDecls.end()); |
Douglas Gregor | 47268a3 | 2010-04-09 17:41:13 +0000 | [diff] [blame] | 477 | |
Douglas Gregor | 467dc88 | 2011-08-25 22:30:56 +0000 | [diff] [blame] | 478 | if (TUKind == TU_Prefix) { |
| 479 | // Translation unit prefixes don't need any of the checking below. |
Douglas Gregor | 87c08a5 | 2010-08-13 22:48:40 +0000 | [diff] [blame] | 480 | TUScope = 0; |
Argyrios Kyrtzidis | 72b9057 | 2010-08-05 09:48:08 +0000 | [diff] [blame] | 481 | return; |
Douglas Gregor | 87c08a5 | 2010-08-13 22:48:40 +0000 | [diff] [blame] | 482 | } |
Argyrios Kyrtzidis | 72b9057 | 2010-08-05 09:48:08 +0000 | [diff] [blame] | 483 | |
Chris Lattner | 63d65f8 | 2009-09-08 18:19:27 +0000 | [diff] [blame] | 484 | // Check for #pragma weak identifiers that were never declared |
| 485 | // FIXME: This will cause diagnostics to be emitted in a non-determinstic |
| 486 | // order! Iterating over a densemap like this is bad. |
Douglas Gregor | 31e37b2 | 2011-07-28 18:09:57 +0000 | [diff] [blame] | 487 | LoadExternalWeakUndeclaredIdentifiers(); |
Ryan Flynn | e25ff83 | 2009-07-30 03:15:39 +0000 | [diff] [blame] | 488 | for (llvm::DenseMap<IdentifierInfo*,WeakInfo>::iterator |
Chris Lattner | 63d65f8 | 2009-09-08 18:19:27 +0000 | [diff] [blame] | 489 | I = WeakUndeclaredIdentifiers.begin(), |
| 490 | E = WeakUndeclaredIdentifiers.end(); I != E; ++I) { |
| 491 | if (I->second.getUsed()) continue; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 492 | |
Chris Lattner | 63d65f8 | 2009-09-08 18:19:27 +0000 | [diff] [blame] | 493 | Diag(I->second.getLocation(), diag::warn_weak_identifier_undeclared) |
| 494 | << I->first; |
Ryan Flynn | e25ff83 | 2009-07-30 03:15:39 +0000 | [diff] [blame] | 495 | } |
| 496 | |
Douglas Gregor | 467dc88 | 2011-08-25 22:30:56 +0000 | [diff] [blame] | 497 | if (TUKind == TU_Module) { |
Douglas Gregor | 90db260 | 2011-12-02 01:47:07 +0000 | [diff] [blame] | 498 | // If we are building a module, resolve all of the exported declarations |
| 499 | // now. |
| 500 | if (Module *CurrentModule = PP.getCurrentModule()) { |
| 501 | ModuleMap &ModMap = PP.getHeaderSearchInfo().getModuleMap(); |
| 502 | |
| 503 | llvm::SmallVector<Module *, 2> Stack; |
| 504 | Stack.push_back(CurrentModule); |
| 505 | while (!Stack.empty()) { |
| 506 | Module *Mod = Stack.back(); |
| 507 | Stack.pop_back(); |
| 508 | |
| 509 | // Resolve the exported declarations. |
| 510 | // FIXME: Actually complain, once we figure out how to teach the |
| 511 | // diagnostic client to deal with complains in the module map at this |
| 512 | // point. |
| 513 | ModMap.resolveExports(Mod, /*Complain=*/false); |
| 514 | |
| 515 | // Queue the submodules, so their exports will also be resolved. |
Douglas Gregor | b7a7819 | 2012-01-04 23:32:19 +0000 | [diff] [blame] | 516 | for (Module::submodule_iterator Sub = Mod->submodule_begin(), |
| 517 | SubEnd = Mod->submodule_end(); |
Douglas Gregor | 90db260 | 2011-12-02 01:47:07 +0000 | [diff] [blame] | 518 | Sub != SubEnd; ++Sub) { |
Douglas Gregor | b7a7819 | 2012-01-04 23:32:19 +0000 | [diff] [blame] | 519 | Stack.push_back(*Sub); |
Douglas Gregor | 90db260 | 2011-12-02 01:47:07 +0000 | [diff] [blame] | 520 | } |
| 521 | } |
| 522 | } |
| 523 | |
Douglas Gregor | 467dc88 | 2011-08-25 22:30:56 +0000 | [diff] [blame] | 524 | // Modules don't need any of the checking below. |
| 525 | TUScope = 0; |
| 526 | return; |
| 527 | } |
| 528 | |
Douglas Gregor | 275a369 | 2009-03-10 23:43:53 +0000 | [diff] [blame] | 529 | // C99 6.9.2p2: |
| 530 | // A declaration of an identifier for an object that has file |
| 531 | // scope without an initializer, and without a storage-class |
| 532 | // specifier or with the storage-class specifier static, |
| 533 | // constitutes a tentative definition. If a translation unit |
| 534 | // contains one or more tentative definitions for an identifier, |
| 535 | // and the translation unit contains no external definition for |
| 536 | // that identifier, then the behavior is exactly as if the |
| 537 | // translation unit contains a file scope declaration of that |
| 538 | // identifier, with the composite type as of the end of the |
| 539 | // translation unit, with an initializer equal to 0. |
Sebastian Redl | e9d12b6 | 2010-01-31 22:27:38 +0000 | [diff] [blame] | 540 | llvm::SmallSet<VarDecl *, 32> Seen; |
Douglas Gregor | a862320 | 2011-07-27 20:58:46 +0000 | [diff] [blame] | 541 | for (TentativeDefinitionsType::iterator |
| 542 | T = TentativeDefinitions.begin(ExternalSource), |
| 543 | TEnd = TentativeDefinitions.end(); |
| 544 | T != TEnd; ++T) |
| 545 | { |
| 546 | VarDecl *VD = (*T)->getActingDefinition(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 547 | |
Sebastian Redl | e9d12b6 | 2010-01-31 22:27:38 +0000 | [diff] [blame] | 548 | // If the tentative definition was completed, getActingDefinition() returns |
| 549 | // null. If we've already seen this variable before, insert()'s second |
| 550 | // return value is false. |
| 551 | if (VD == 0 || VD->isInvalidDecl() || !Seen.insert(VD)) |
Douglas Gregor | b6c8c8b | 2009-04-21 17:11:58 +0000 | [diff] [blame] | 552 | continue; |
| 553 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 554 | if (const IncompleteArrayType *ArrayT |
Douglas Gregor | b6c8c8b | 2009-04-21 17:11:58 +0000 | [diff] [blame] | 555 | = Context.getAsIncompleteArrayType(VD->getType())) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 556 | if (RequireCompleteType(VD->getLocation(), |
Douglas Gregor | b6c8c8b | 2009-04-21 17:11:58 +0000 | [diff] [blame] | 557 | ArrayT->getElementType(), |
Chris Lattner | 63d65f8 | 2009-09-08 18:19:27 +0000 | [diff] [blame] | 558 | diag::err_tentative_def_incomplete_type_arr)) { |
Douglas Gregor | b6c8c8b | 2009-04-21 17:11:58 +0000 | [diff] [blame] | 559 | VD->setInvalidDecl(); |
Chris Lattner | 63d65f8 | 2009-09-08 18:19:27 +0000 | [diff] [blame] | 560 | continue; |
Douglas Gregor | 275a369 | 2009-03-10 23:43:53 +0000 | [diff] [blame] | 561 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 562 | |
Chris Lattner | 63d65f8 | 2009-09-08 18:19:27 +0000 | [diff] [blame] | 563 | // Set the length of the array to 1 (C99 6.9.2p5). |
| 564 | Diag(VD->getLocation(), diag::warn_tentative_incomplete_array); |
| 565 | llvm::APInt One(Context.getTypeSize(Context.getSizeType()), true); |
John McCall | 46a617a | 2009-10-16 00:14:28 +0000 | [diff] [blame] | 566 | QualType T = Context.getConstantArrayType(ArrayT->getElementType(), |
| 567 | One, ArrayType::Normal, 0); |
Chris Lattner | 63d65f8 | 2009-09-08 18:19:27 +0000 | [diff] [blame] | 568 | VD->setType(T); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 569 | } else if (RequireCompleteType(VD->getLocation(), VD->getType(), |
Douglas Gregor | b6c8c8b | 2009-04-21 17:11:58 +0000 | [diff] [blame] | 570 | diag::err_tentative_def_incomplete_type)) |
| 571 | VD->setInvalidDecl(); |
| 572 | |
| 573 | // Notify the consumer that we've completed a tentative definition. |
| 574 | if (!VD->isInvalidDecl()) |
| 575 | Consumer.CompleteTentativeDefinition(VD); |
| 576 | |
Douglas Gregor | 275a369 | 2009-03-10 23:43:53 +0000 | [diff] [blame] | 577 | } |
Argyrios Kyrtzidis | 43f0a7c | 2011-01-31 07:04:37 +0000 | [diff] [blame] | 578 | |
Sean Hunt | c159870 | 2011-05-05 00:05:47 +0000 | [diff] [blame] | 579 | if (LangOpts.CPlusPlus0x && |
| 580 | Diags.getDiagnosticLevel(diag::warn_delegating_ctor_cycle, |
| 581 | SourceLocation()) |
David Blaikie | d6471f7 | 2011-09-25 23:23:43 +0000 | [diff] [blame] | 582 | != DiagnosticsEngine::Ignored) |
Sean Hunt | fe57eef | 2011-05-04 05:57:24 +0000 | [diff] [blame] | 583 | CheckDelegatingCtorCycles(); |
| 584 | |
Argyrios Kyrtzidis | 43f0a7c | 2011-01-31 07:04:37 +0000 | [diff] [blame] | 585 | // If there were errors, disable 'unused' warnings since they will mostly be |
| 586 | // noise. |
| 587 | if (!Diags.hasErrorOccurred()) { |
| 588 | // Output warning for unused file scoped decls. |
Douglas Gregor | a2ee20a | 2011-07-27 21:45:57 +0000 | [diff] [blame] | 589 | for (UnusedFileScopedDeclsType::iterator |
| 590 | I = UnusedFileScopedDecls.begin(ExternalSource), |
Argyrios Kyrtzidis | 43f0a7c | 2011-01-31 07:04:37 +0000 | [diff] [blame] | 591 | E = UnusedFileScopedDecls.end(); I != E; ++I) { |
Douglas Gregor | a2ee20a | 2011-07-27 21:45:57 +0000 | [diff] [blame] | 592 | if (ShouldRemoveFromUnused(this, *I)) |
| 593 | continue; |
| 594 | |
Argyrios Kyrtzidis | 43f0a7c | 2011-01-31 07:04:37 +0000 | [diff] [blame] | 595 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(*I)) { |
| 596 | const FunctionDecl *DiagD; |
| 597 | if (!FD->hasBody(DiagD)) |
| 598 | DiagD = FD; |
Argyrios Kyrtzidis | 48b8959 | 2011-03-03 17:47:42 +0000 | [diff] [blame] | 599 | if (DiagD->isDeleted()) |
| 600 | continue; // Deleted functions are supposed to be unused. |
Argyrios Kyrtzidis | 6b6b42a | 2011-04-19 19:51:10 +0000 | [diff] [blame] | 601 | if (DiagD->isReferenced()) { |
| 602 | if (isa<CXXMethodDecl>(DiagD)) |
| 603 | Diag(DiagD->getLocation(), diag::warn_unneeded_member_function) |
| 604 | << DiagD->getDeclName(); |
| 605 | else |
| 606 | Diag(DiagD->getLocation(), diag::warn_unneeded_internal_decl) |
| 607 | << /*function*/0 << DiagD->getDeclName(); |
| 608 | } else { |
| 609 | Diag(DiagD->getLocation(), |
| 610 | isa<CXXMethodDecl>(DiagD) ? diag::warn_unused_member_function |
| 611 | : diag::warn_unused_function) |
| 612 | << DiagD->getDeclName(); |
| 613 | } |
Argyrios Kyrtzidis | 43f0a7c | 2011-01-31 07:04:37 +0000 | [diff] [blame] | 614 | } else { |
| 615 | const VarDecl *DiagD = cast<VarDecl>(*I)->getDefinition(); |
| 616 | if (!DiagD) |
| 617 | DiagD = cast<VarDecl>(*I); |
Argyrios Kyrtzidis | 6b6b42a | 2011-04-19 19:51:10 +0000 | [diff] [blame] | 618 | if (DiagD->isReferenced()) { |
| 619 | Diag(DiagD->getLocation(), diag::warn_unneeded_internal_decl) |
| 620 | << /*variable*/1 << DiagD->getDeclName(); |
| 621 | } else { |
| 622 | Diag(DiagD->getLocation(), diag::warn_unused_variable) |
| 623 | << DiagD->getDeclName(); |
| 624 | } |
Argyrios Kyrtzidis | 43f0a7c | 2011-01-31 07:04:37 +0000 | [diff] [blame] | 625 | } |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 626 | } |
John McCall | 15e310a | 2011-02-19 02:53:41 +0000 | [diff] [blame] | 627 | |
| 628 | checkUndefinedInternals(*this); |
Argyrios Kyrtzidis | 49b96d1 | 2010-08-13 18:42:17 +0000 | [diff] [blame] | 629 | } |
Douglas Gregor | 87c08a5 | 2010-08-13 22:48:40 +0000 | [diff] [blame] | 630 | |
Richard Smith | 483b9f3 | 2011-02-21 20:05:19 +0000 | [diff] [blame] | 631 | // Check we've noticed that we're no longer parsing the initializer for every |
| 632 | // variable. If we miss cases, then at best we have a performance issue and |
| 633 | // at worst a rejects-valid bug. |
| 634 | assert(ParsingInitForAutoVars.empty() && |
| 635 | "Didn't unmark var as having its initializer parsed"); |
| 636 | |
Douglas Gregor | 87c08a5 | 2010-08-13 22:48:40 +0000 | [diff] [blame] | 637 | TUScope = 0; |
Chris Lattner | 9299f3f | 2008-08-23 03:19:52 +0000 | [diff] [blame] | 638 | } |
| 639 | |
| 640 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 641 | //===----------------------------------------------------------------------===// |
| 642 | // Helper functions. |
| 643 | //===----------------------------------------------------------------------===// |
| 644 | |
Anders Carlsson | 8517d9b | 2009-08-08 17:45:02 +0000 | [diff] [blame] | 645 | DeclContext *Sema::getFunctionLevelDeclContext() { |
John McCall | db0ee1d | 2009-12-19 10:53:49 +0000 | [diff] [blame] | 646 | DeclContext *DC = CurContext; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 647 | |
Eli Friedman | 72899c3 | 2012-01-07 04:59:52 +0000 | [diff] [blame] | 648 | while (true) { |
| 649 | if (isa<BlockDecl>(DC) || isa<EnumDecl>(DC)) { |
| 650 | DC = DC->getParent(); |
| 651 | } else if (isa<CXXMethodDecl>(DC) && |
Douglas Gregor | 215e4e1 | 2012-02-12 17:34:23 +0000 | [diff] [blame] | 652 | cast<CXXMethodDecl>(DC)->getOverloadedOperator() == OO_Call && |
Eli Friedman | 72899c3 | 2012-01-07 04:59:52 +0000 | [diff] [blame] | 653 | cast<CXXRecordDecl>(DC->getParent())->isLambda()) { |
| 654 | DC = DC->getParent()->getParent(); |
| 655 | } |
| 656 | else break; |
| 657 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 658 | |
Anders Carlsson | 8517d9b | 2009-08-08 17:45:02 +0000 | [diff] [blame] | 659 | return DC; |
| 660 | } |
| 661 | |
Chris Lattner | 371f258 | 2008-12-04 23:50:19 +0000 | [diff] [blame] | 662 | /// getCurFunctionDecl - If inside of a function body, this returns a pointer |
| 663 | /// to the function decl for the function being parsed. If we're currently |
| 664 | /// in a 'block', this returns the containing context. |
| 665 | FunctionDecl *Sema::getCurFunctionDecl() { |
Anders Carlsson | 8517d9b | 2009-08-08 17:45:02 +0000 | [diff] [blame] | 666 | DeclContext *DC = getFunctionLevelDeclContext(); |
Chris Lattner | 371f258 | 2008-12-04 23:50:19 +0000 | [diff] [blame] | 667 | return dyn_cast<FunctionDecl>(DC); |
| 668 | } |
| 669 | |
Daniel Dunbar | c4a1dea | 2008-08-11 05:35:13 +0000 | [diff] [blame] | 670 | ObjCMethodDecl *Sema::getCurMethodDecl() { |
Anders Carlsson | 8517d9b | 2009-08-08 17:45:02 +0000 | [diff] [blame] | 671 | DeclContext *DC = getFunctionLevelDeclContext(); |
Steve Naroff | d7612e1 | 2008-11-17 16:28:52 +0000 | [diff] [blame] | 672 | return dyn_cast<ObjCMethodDecl>(DC); |
Daniel Dunbar | c4a1dea | 2008-08-11 05:35:13 +0000 | [diff] [blame] | 673 | } |
Chris Lattner | 371f258 | 2008-12-04 23:50:19 +0000 | [diff] [blame] | 674 | |
| 675 | NamedDecl *Sema::getCurFunctionOrMethodDecl() { |
Anders Carlsson | 8517d9b | 2009-08-08 17:45:02 +0000 | [diff] [blame] | 676 | DeclContext *DC = getFunctionLevelDeclContext(); |
Chris Lattner | 371f258 | 2008-12-04 23:50:19 +0000 | [diff] [blame] | 677 | if (isa<ObjCMethodDecl>(DC) || isa<FunctionDecl>(DC)) |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 678 | return cast<NamedDecl>(DC); |
Chris Lattner | 371f258 | 2008-12-04 23:50:19 +0000 | [diff] [blame] | 679 | return 0; |
| 680 | } |
| 681 | |
Daniel Dunbar | 393eed7 | 2012-03-14 09:49:32 +0000 | [diff] [blame] | 682 | void Sema::EmitCurrentDiagnostic(unsigned DiagID) { |
| 683 | // FIXME: It doesn't make sense to me that DiagID is an incoming argument here |
| 684 | // and yet we also use the current diag ID on the DiagnosticsEngine. This has |
| 685 | // been made more painfully obvious by the refactor that introduced this |
| 686 | // function, but it is possible that the incoming argument can be |
| 687 | // eliminnated. If it truly cannot be (for example, there is some reentrancy |
| 688 | // issue I am not seeing yet), then there should at least be a clarifying |
| 689 | // comment somewhere. |
| 690 | if (llvm::Optional<TemplateDeductionInfo*> Info = isSFINAEContext()) { |
| 691 | switch (DiagnosticIDs::getDiagnosticSFINAEResponse( |
| 692 | Diags.getCurrentDiagID())) { |
Argyrios Kyrtzidis | 33e4e70 | 2010-11-18 20:06:41 +0000 | [diff] [blame] | 693 | case DiagnosticIDs::SFINAE_Report: |
Richard Smith | 77faa36 | 2011-10-19 00:07:01 +0000 | [diff] [blame] | 694 | // We'll report the diagnostic below. |
Douglas Gregor | 9b62363 | 2010-10-12 23:32:35 +0000 | [diff] [blame] | 695 | break; |
| 696 | |
Argyrios Kyrtzidis | 33e4e70 | 2010-11-18 20:06:41 +0000 | [diff] [blame] | 697 | case DiagnosticIDs::SFINAE_SubstitutionFailure: |
Douglas Gregor | 9b62363 | 2010-10-12 23:32:35 +0000 | [diff] [blame] | 698 | // Count this failure so that we know that template argument deduction |
| 699 | // has failed. |
Daniel Dunbar | 393eed7 | 2012-03-14 09:49:32 +0000 | [diff] [blame] | 700 | ++NumSFINAEErrors; |
| 701 | Diags.setLastDiagnosticIgnored(); |
| 702 | Diags.Clear(); |
Douglas Gregor | 9b62363 | 2010-10-12 23:32:35 +0000 | [diff] [blame] | 703 | return; |
| 704 | |
Richard Smith | 77faa36 | 2011-10-19 00:07:01 +0000 | [diff] [blame] | 705 | case DiagnosticIDs::SFINAE_AccessControl: { |
| 706 | // Per C++ Core Issue 1170, access control is part of SFINAE. |
Daniel Dunbar | 00b4384 | 2012-03-13 18:30:54 +0000 | [diff] [blame] | 707 | // Additionally, the AccessCheckingSFINAE flag can be used to temporarily |
Richard Smith | 77faa36 | 2011-10-19 00:07:01 +0000 | [diff] [blame] | 708 | // make access control a part of SFINAE for the purposes of checking |
| 709 | // type traits. |
Daniel Dunbar | 393eed7 | 2012-03-14 09:49:32 +0000 | [diff] [blame] | 710 | if (!AccessCheckingSFINAE && !getLangOpts().CPlusPlus0x) |
Richard Smith | 77faa36 | 2011-10-19 00:07:01 +0000 | [diff] [blame] | 711 | break; |
| 712 | |
Daniel Dunbar | 393eed7 | 2012-03-14 09:49:32 +0000 | [diff] [blame] | 713 | SourceLocation Loc = Diags.getCurrentDiagLoc(); |
Richard Smith | 77faa36 | 2011-10-19 00:07:01 +0000 | [diff] [blame] | 714 | |
| 715 | // Suppress this diagnostic. |
Daniel Dunbar | 393eed7 | 2012-03-14 09:49:32 +0000 | [diff] [blame] | 716 | ++NumSFINAEErrors; |
| 717 | Diags.setLastDiagnosticIgnored(); |
| 718 | Diags.Clear(); |
Richard Smith | 77faa36 | 2011-10-19 00:07:01 +0000 | [diff] [blame] | 719 | |
| 720 | // Now the diagnostic state is clear, produce a C++98 compatibility |
| 721 | // warning. |
Daniel Dunbar | 393eed7 | 2012-03-14 09:49:32 +0000 | [diff] [blame] | 722 | Diag(Loc, diag::warn_cxx98_compat_sfinae_access_control); |
Richard Smith | 77faa36 | 2011-10-19 00:07:01 +0000 | [diff] [blame] | 723 | |
| 724 | // The last diagnostic which Sema produced was ignored. Suppress any |
| 725 | // notes attached to it. |
Daniel Dunbar | 393eed7 | 2012-03-14 09:49:32 +0000 | [diff] [blame] | 726 | Diags.setLastDiagnosticIgnored(); |
Richard Smith | 77faa36 | 2011-10-19 00:07:01 +0000 | [diff] [blame] | 727 | return; |
| 728 | } |
| 729 | |
Argyrios Kyrtzidis | 33e4e70 | 2010-11-18 20:06:41 +0000 | [diff] [blame] | 730 | case DiagnosticIDs::SFINAE_Suppress: |
Douglas Gregor | 9b62363 | 2010-10-12 23:32:35 +0000 | [diff] [blame] | 731 | // Make a copy of this suppressed diagnostic and store it with the |
| 732 | // template-deduction information; |
Daniel Dunbar | 393eed7 | 2012-03-14 09:49:32 +0000 | [diff] [blame] | 733 | Diagnostic DiagInfo(&Diags); |
Douglas Gregor | b535041 | 2010-10-13 17:22:14 +0000 | [diff] [blame] | 734 | |
Douglas Gregor | 1eee5dc | 2011-01-27 22:31:44 +0000 | [diff] [blame] | 735 | if (*Info) |
| 736 | (*Info)->addSuppressedDiagnostic(DiagInfo.getLocation(), |
Daniel Dunbar | 393eed7 | 2012-03-14 09:49:32 +0000 | [diff] [blame] | 737 | PartialDiagnostic(DiagInfo,Context.getDiagAllocator())); |
Douglas Gregor | 9b62363 | 2010-10-12 23:32:35 +0000 | [diff] [blame] | 738 | |
| 739 | // Suppress this diagnostic. |
Daniel Dunbar | 393eed7 | 2012-03-14 09:49:32 +0000 | [diff] [blame] | 740 | Diags.setLastDiagnosticIgnored(); |
| 741 | Diags.Clear(); |
Douglas Gregor | 9b62363 | 2010-10-12 23:32:35 +0000 | [diff] [blame] | 742 | return; |
| 743 | } |
| 744 | } |
| 745 | |
Douglas Gregor | 8987b23 | 2011-09-27 23:30:47 +0000 | [diff] [blame] | 746 | // Set up the context's printing policy based on our current state. |
Daniel Dunbar | 393eed7 | 2012-03-14 09:49:32 +0000 | [diff] [blame] | 747 | Context.setPrintingPolicy(getPrintingPolicy()); |
Douglas Gregor | 8987b23 | 2011-09-27 23:30:47 +0000 | [diff] [blame] | 748 | |
Douglas Gregor | 9b62363 | 2010-10-12 23:32:35 +0000 | [diff] [blame] | 749 | // Emit the diagnostic. |
Daniel Dunbar | 393eed7 | 2012-03-14 09:49:32 +0000 | [diff] [blame] | 750 | if (!Diags.EmitCurrentDiagnostic()) |
Douglas Gregor | 5e9f35c | 2009-06-14 07:33:30 +0000 | [diff] [blame] | 751 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 752 | |
Douglas Gregor | 25a88bb | 2009-03-20 22:48:49 +0000 | [diff] [blame] | 753 | // If this is not a note, and we're in a template instantiation |
| 754 | // that is different from the last template instantiation where |
| 755 | // we emitted an error, print a template instantiation |
| 756 | // backtrace. |
Argyrios Kyrtzidis | 33e4e70 | 2010-11-18 20:06:41 +0000 | [diff] [blame] | 757 | if (!DiagnosticIDs::isBuiltinNote(DiagID) && |
Daniel Dunbar | 393eed7 | 2012-03-14 09:49:32 +0000 | [diff] [blame] | 758 | !ActiveTemplateInstantiations.empty() && |
| 759 | ActiveTemplateInstantiations.back() |
| 760 | != LastTemplateInstantiationErrorContext) { |
| 761 | PrintInstantiationStack(); |
| 762 | LastTemplateInstantiationErrorContext = ActiveTemplateInstantiations.back(); |
Douglas Gregor | 25a88bb | 2009-03-20 22:48:49 +0000 | [diff] [blame] | 763 | } |
| 764 | } |
Douglas Gregor | 2e22253 | 2009-07-02 17:08:52 +0000 | [diff] [blame] | 765 | |
Anders Carlsson | 91a0cc9 | 2009-08-26 22:33:56 +0000 | [diff] [blame] | 766 | Sema::SemaDiagnosticBuilder |
| 767 | Sema::Diag(SourceLocation Loc, const PartialDiagnostic& PD) { |
| 768 | SemaDiagnosticBuilder Builder(Diag(Loc, PD.getDiagID())); |
| 769 | PD.Emit(Builder); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 770 | |
Anders Carlsson | 91a0cc9 | 2009-08-26 22:33:56 +0000 | [diff] [blame] | 771 | return Builder; |
| 772 | } |
| 773 | |
Chandler Carruth | 108f756 | 2011-07-26 05:40:03 +0000 | [diff] [blame] | 774 | /// \brief Looks through the macro-expansion chain for the given |
| 775 | /// location, looking for a macro expansion with the given name. |
John McCall | 834e3f6 | 2011-03-08 07:59:04 +0000 | [diff] [blame] | 776 | /// If one is found, returns true and sets the location to that |
Chandler Carruth | 108f756 | 2011-07-26 05:40:03 +0000 | [diff] [blame] | 777 | /// expansion loc. |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 778 | bool Sema::findMacroSpelling(SourceLocation &locref, StringRef name) { |
John McCall | 834e3f6 | 2011-03-08 07:59:04 +0000 | [diff] [blame] | 779 | SourceLocation loc = locref; |
| 780 | if (!loc.isMacroID()) return false; |
| 781 | |
| 782 | // There's no good way right now to look at the intermediate |
Chandler Carruth | 108f756 | 2011-07-26 05:40:03 +0000 | [diff] [blame] | 783 | // expansions, so just jump to the expansion location. |
Chandler Carruth | 4027853 | 2011-07-25 16:49:02 +0000 | [diff] [blame] | 784 | loc = getSourceManager().getExpansionLoc(loc); |
John McCall | 834e3f6 | 2011-03-08 07:59:04 +0000 | [diff] [blame] | 785 | |
| 786 | // If that's written with the name, stop here. |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 787 | SmallVector<char, 16> buffer; |
John McCall | 834e3f6 | 2011-03-08 07:59:04 +0000 | [diff] [blame] | 788 | if (getPreprocessor().getSpelling(loc, buffer) == name) { |
| 789 | locref = loc; |
| 790 | return true; |
| 791 | } |
| 792 | return false; |
| 793 | } |
| 794 | |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 795 | /// \brief Determines the active Scope associated with the given declaration |
| 796 | /// context. |
| 797 | /// |
| 798 | /// This routine maps a declaration context to the active Scope object that |
| 799 | /// represents that declaration context in the parser. It is typically used |
| 800 | /// from "scope-less" code (e.g., template instantiation, lazy creation of |
| 801 | /// declarations) that injects a name for name-lookup purposes and, therefore, |
| 802 | /// must update the Scope. |
| 803 | /// |
| 804 | /// \returns The scope corresponding to the given declaraion context, or NULL |
| 805 | /// if no such scope is open. |
| 806 | Scope *Sema::getScopeForContext(DeclContext *Ctx) { |
| 807 | |
| 808 | if (!Ctx) |
| 809 | return 0; |
| 810 | |
| 811 | Ctx = Ctx->getPrimaryContext(); |
| 812 | for (Scope *S = getCurScope(); S; S = S->getParent()) { |
Sebastian Redl | cddc69f | 2010-07-08 23:07:34 +0000 | [diff] [blame] | 813 | // Ignore scopes that cannot have declarations. This is important for |
| 814 | // out-of-line definitions of static class members. |
| 815 | if (S->getFlags() & (Scope::DeclScope | Scope::TemplateParamScope)) |
| 816 | if (DeclContext *Entity = static_cast<DeclContext *> (S->getEntity())) |
| 817 | if (Ctx == Entity->getPrimaryContext()) |
| 818 | return S; |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 819 | } |
| 820 | |
| 821 | return 0; |
| 822 | } |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 823 | |
| 824 | /// \brief Enter a new function scope |
| 825 | void Sema::PushFunctionScope() { |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 826 | if (FunctionScopes.size() == 1) { |
| 827 | // Use the "top" function scope rather than having to allocate |
| 828 | // memory for a new scope. |
Argyrios Kyrtzidis | 8fc32d2 | 2010-11-19 00:19:15 +0000 | [diff] [blame] | 829 | FunctionScopes.back()->Clear(); |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 830 | FunctionScopes.push_back(FunctionScopes.back()); |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 831 | return; |
| 832 | } |
| 833 | |
Argyrios Kyrtzidis | 8fc32d2 | 2010-11-19 00:19:15 +0000 | [diff] [blame] | 834 | FunctionScopes.push_back(new FunctionScopeInfo(getDiagnostics())); |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 835 | } |
| 836 | |
| 837 | void Sema::PushBlockScope(Scope *BlockScope, BlockDecl *Block) { |
Argyrios Kyrtzidis | 8fc32d2 | 2010-11-19 00:19:15 +0000 | [diff] [blame] | 838 | FunctionScopes.push_back(new BlockScopeInfo(getDiagnostics(), |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 839 | BlockScope, Block)); |
| 840 | } |
| 841 | |
Douglas Gregor | 76e3da5 | 2012-02-08 20:17:14 +0000 | [diff] [blame] | 842 | void Sema::PushLambdaScope(CXXRecordDecl *Lambda, |
| 843 | CXXMethodDecl *CallOperator) { |
| 844 | FunctionScopes.push_back(new LambdaScopeInfo(getDiagnostics(), Lambda, |
| 845 | CallOperator)); |
Eli Friedman | ec9ea72 | 2012-01-05 03:35:19 +0000 | [diff] [blame] | 846 | } |
| 847 | |
| 848 | void Sema::PopFunctionScopeInfo(const AnalysisBasedWarnings::Policy *WP, |
| 849 | const Decl *D, const BlockExpr *blkExpr) { |
Ted Kremenek | 3ed6fc0 | 2011-02-23 01:51:48 +0000 | [diff] [blame] | 850 | FunctionScopeInfo *Scope = FunctionScopes.pop_back_val(); |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 851 | assert(!FunctionScopes.empty() && "mismatched push/pop!"); |
Ted Kremenek | 3ed6fc0 | 2011-02-23 01:51:48 +0000 | [diff] [blame] | 852 | |
| 853 | // Issue any analysis-based warnings. |
| 854 | if (WP && D) |
Ted Kremenek | 283a358 | 2011-02-23 01:51:53 +0000 | [diff] [blame] | 855 | AnalysisWarnings.IssueWarnings(*WP, Scope, D, blkExpr); |
Ted Kremenek | 351ba91 | 2011-02-23 01:52:04 +0000 | [diff] [blame] | 856 | else { |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 857 | for (SmallVectorImpl<sema::PossiblyUnreachableDiag>::iterator |
Ted Kremenek | 351ba91 | 2011-02-23 01:52:04 +0000 | [diff] [blame] | 858 | i = Scope->PossiblyUnreachableDiags.begin(), |
| 859 | e = Scope->PossiblyUnreachableDiags.end(); |
| 860 | i != e; ++i) { |
| 861 | const sema::PossiblyUnreachableDiag &D = *i; |
| 862 | Diag(D.Loc, D.PD); |
| 863 | } |
| 864 | } |
Ted Kremenek | 3ed6fc0 | 2011-02-23 01:51:48 +0000 | [diff] [blame] | 865 | |
Ted Kremenek | 351ba91 | 2011-02-23 01:52:04 +0000 | [diff] [blame] | 866 | if (FunctionScopes.back() != Scope) { |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 867 | delete Scope; |
Ted Kremenek | 351ba91 | 2011-02-23 01:52:04 +0000 | [diff] [blame] | 868 | } |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 869 | } |
| 870 | |
Dmitri Gribenko | 625bb56 | 2012-02-14 22:14:32 +0000 | [diff] [blame] | 871 | void Sema::PushCompoundScope() { |
| 872 | getCurFunction()->CompoundScopes.push_back(CompoundScopeInfo()); |
| 873 | } |
| 874 | |
| 875 | void Sema::PopCompoundScope() { |
| 876 | FunctionScopeInfo *CurFunction = getCurFunction(); |
| 877 | assert(!CurFunction->CompoundScopes.empty() && "mismatched push/pop"); |
| 878 | |
| 879 | CurFunction->CompoundScopes.pop_back(); |
| 880 | } |
| 881 | |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 882 | /// \brief Determine whether any errors occurred within this function/method/ |
| 883 | /// block. |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 884 | bool Sema::hasAnyUnrecoverableErrorsInThisFunction() const { |
| 885 | return getCurFunction()->ErrorTrap.hasUnrecoverableErrorOccurred(); |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 886 | } |
| 887 | |
| 888 | BlockScopeInfo *Sema::getCurBlock() { |
| 889 | if (FunctionScopes.empty()) |
| 890 | return 0; |
| 891 | |
| 892 | return dyn_cast<BlockScopeInfo>(FunctionScopes.back()); |
| 893 | } |
John McCall | 76bd1f3 | 2010-06-01 09:23:16 +0000 | [diff] [blame] | 894 | |
Eli Friedman | 906a7e1 | 2012-01-06 03:05:34 +0000 | [diff] [blame] | 895 | LambdaScopeInfo *Sema::getCurLambda() { |
| 896 | if (FunctionScopes.empty()) |
| 897 | return 0; |
| 898 | |
| 899 | return dyn_cast<LambdaScopeInfo>(FunctionScopes.back()); |
| 900 | } |
| 901 | |
John McCall | 76bd1f3 | 2010-06-01 09:23:16 +0000 | [diff] [blame] | 902 | // Pin this vtable to this file. |
| 903 | ExternalSemaSource::~ExternalSemaSource() {} |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 904 | |
Douglas Gregor | 5ac4b69 | 2012-01-25 00:49:42 +0000 | [diff] [blame] | 905 | void ExternalSemaSource::ReadMethodPool(Selector Sel) { } |
Sebastian Redl | 8c84571 | 2010-09-28 20:23:00 +0000 | [diff] [blame] | 906 | |
Douglas Gregor | d8bba9c | 2011-06-28 16:20:02 +0000 | [diff] [blame] | 907 | void ExternalSemaSource::ReadKnownNamespaces( |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 908 | SmallVectorImpl<NamespaceDecl *> &Namespaces) { |
Douglas Gregor | d8bba9c | 2011-06-28 16:20:02 +0000 | [diff] [blame] | 909 | } |
| 910 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 911 | void PrettyDeclStackTraceEntry::print(raw_ostream &OS) const { |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 912 | SourceLocation Loc = this->Loc; |
| 913 | if (!Loc.isValid() && TheDecl) Loc = TheDecl->getLocation(); |
| 914 | if (Loc.isValid()) { |
| 915 | Loc.print(OS, S.getSourceManager()); |
| 916 | OS << ": "; |
| 917 | } |
| 918 | OS << Message; |
| 919 | |
| 920 | if (TheDecl && isa<NamedDecl>(TheDecl)) { |
| 921 | std::string Name = cast<NamedDecl>(TheDecl)->getNameAsString(); |
| 922 | if (!Name.empty()) |
| 923 | OS << " '" << Name << '\''; |
| 924 | } |
| 925 | |
| 926 | OS << '\n'; |
| 927 | } |
Matt Beaumont-Gay | c9366ba | 2011-05-04 22:10:40 +0000 | [diff] [blame] | 928 | |
| 929 | /// \brief Figure out if an expression could be turned into a call. |
| 930 | /// |
| 931 | /// Use this when trying to recover from an error where the programmer may have |
| 932 | /// written just the name of a function instead of actually calling it. |
| 933 | /// |
| 934 | /// \param E - The expression to examine. |
| 935 | /// \param ZeroArgCallReturnTy - If the expression can be turned into a call |
| 936 | /// with no arguments, this parameter is set to the type returned by such a |
| 937 | /// call; otherwise, it is set to an empty QualType. |
John McCall | 6dbba4f | 2011-10-11 23:14:30 +0000 | [diff] [blame] | 938 | /// \param OverloadSet - If the expression is an overloaded function |
Matt Beaumont-Gay | c9366ba | 2011-05-04 22:10:40 +0000 | [diff] [blame] | 939 | /// name, this parameter is populated with the decls of the various overloads. |
| 940 | bool Sema::isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, |
John McCall | 6dbba4f | 2011-10-11 23:14:30 +0000 | [diff] [blame] | 941 | UnresolvedSetImpl &OverloadSet) { |
Matt Beaumont-Gay | c9366ba | 2011-05-04 22:10:40 +0000 | [diff] [blame] | 942 | ZeroArgCallReturnTy = QualType(); |
John McCall | 6dbba4f | 2011-10-11 23:14:30 +0000 | [diff] [blame] | 943 | OverloadSet.clear(); |
| 944 | |
| 945 | if (E.getType() == Context.OverloadTy) { |
| 946 | OverloadExpr::FindResult FR = OverloadExpr::find(const_cast<Expr*>(&E)); |
| 947 | const OverloadExpr *Overloads = FR.Expression; |
| 948 | |
Matt Beaumont-Gay | c9366ba | 2011-05-04 22:10:40 +0000 | [diff] [blame] | 949 | for (OverloadExpr::decls_iterator it = Overloads->decls_begin(), |
| 950 | DeclsEnd = Overloads->decls_end(); it != DeclsEnd; ++it) { |
John McCall | 6dbba4f | 2011-10-11 23:14:30 +0000 | [diff] [blame] | 951 | OverloadSet.addDecl(*it); |
| 952 | |
| 953 | // Check whether the function is a non-template which takes no |
| 954 | // arguments. |
| 955 | if (const FunctionDecl *OverloadDecl |
| 956 | = dyn_cast<FunctionDecl>((*it)->getUnderlyingDecl())) { |
Matt Beaumont-Gay | c9366ba | 2011-05-04 22:10:40 +0000 | [diff] [blame] | 957 | if (OverloadDecl->getMinRequiredArguments() == 0) |
| 958 | ZeroArgCallReturnTy = OverloadDecl->getResultType(); |
| 959 | } |
| 960 | } |
John McCall | 6dbba4f | 2011-10-11 23:14:30 +0000 | [diff] [blame] | 961 | |
Douglas Gregor | 64a371f | 2011-10-13 18:26:27 +0000 | [diff] [blame] | 962 | // Ignore overloads that are pointer-to-member constants. |
| 963 | if (FR.HasFormOfMemberPointer) |
John McCall | 6dbba4f | 2011-10-11 23:14:30 +0000 | [diff] [blame] | 964 | return false; |
| 965 | |
Matt Beaumont-Gay | c9366ba | 2011-05-04 22:10:40 +0000 | [diff] [blame] | 966 | return true; |
| 967 | } |
| 968 | |
John McCall | 6dbba4f | 2011-10-11 23:14:30 +0000 | [diff] [blame] | 969 | if (const DeclRefExpr *DeclRef = dyn_cast<DeclRefExpr>(E.IgnoreParens())) { |
Matt Beaumont-Gay | c9366ba | 2011-05-04 22:10:40 +0000 | [diff] [blame] | 970 | if (const FunctionDecl *Fun = dyn_cast<FunctionDecl>(DeclRef->getDecl())) { |
| 971 | if (Fun->getMinRequiredArguments() == 0) |
| 972 | ZeroArgCallReturnTy = Fun->getResultType(); |
| 973 | return true; |
| 974 | } |
| 975 | } |
| 976 | |
| 977 | // We don't have an expression that's convenient to get a FunctionDecl from, |
| 978 | // but we can at least check if the type is "function of 0 arguments". |
| 979 | QualType ExprTy = E.getType(); |
| 980 | const FunctionType *FunTy = NULL; |
Matt Beaumont-Gay | 9389ddc | 2011-05-05 00:59:35 +0000 | [diff] [blame] | 981 | QualType PointeeTy = ExprTy->getPointeeType(); |
| 982 | if (!PointeeTy.isNull()) |
| 983 | FunTy = PointeeTy->getAs<FunctionType>(); |
Matt Beaumont-Gay | c9366ba | 2011-05-04 22:10:40 +0000 | [diff] [blame] | 984 | if (!FunTy) |
| 985 | FunTy = ExprTy->getAs<FunctionType>(); |
| 986 | if (!FunTy && ExprTy == Context.BoundMemberTy) { |
| 987 | // Look for the bound-member type. If it's still overloaded, give up, |
| 988 | // although we probably should have fallen into the OverloadExpr case above |
| 989 | // if we actually have an overloaded bound member. |
| 990 | QualType BoundMemberTy = Expr::findBoundMemberType(&E); |
| 991 | if (!BoundMemberTy.isNull()) |
| 992 | FunTy = BoundMemberTy->castAs<FunctionType>(); |
| 993 | } |
| 994 | |
| 995 | if (const FunctionProtoType *FPT = |
| 996 | dyn_cast_or_null<FunctionProtoType>(FunTy)) { |
| 997 | if (FPT->getNumArgs() == 0) |
| 998 | ZeroArgCallReturnTy = FunTy->getResultType(); |
| 999 | return true; |
| 1000 | } |
| 1001 | return false; |
| 1002 | } |
| 1003 | |
| 1004 | /// \brief Give notes for a set of overloads. |
| 1005 | /// |
| 1006 | /// A companion to isExprCallable. In cases when the name that the programmer |
| 1007 | /// wrote was an overloaded function, we may be able to make some guesses about |
| 1008 | /// plausible overloads based on their return types; such guesses can be handed |
| 1009 | /// off to this method to be emitted as notes. |
| 1010 | /// |
| 1011 | /// \param Overloads - The overloads to note. |
| 1012 | /// \param FinalNoteLoc - If we've suppressed printing some overloads due to |
| 1013 | /// -fshow-overloads=best, this is the location to attach to the note about too |
| 1014 | /// many candidates. Typically this will be the location of the original |
| 1015 | /// ill-formed expression. |
John McCall | 6dbba4f | 2011-10-11 23:14:30 +0000 | [diff] [blame] | 1016 | static void noteOverloads(Sema &S, const UnresolvedSetImpl &Overloads, |
| 1017 | const SourceLocation FinalNoteLoc) { |
Matt Beaumont-Gay | c9366ba | 2011-05-04 22:10:40 +0000 | [diff] [blame] | 1018 | int ShownOverloads = 0; |
| 1019 | int SuppressedOverloads = 0; |
| 1020 | for (UnresolvedSetImpl::iterator It = Overloads.begin(), |
| 1021 | DeclsEnd = Overloads.end(); It != DeclsEnd; ++It) { |
| 1022 | // FIXME: Magic number for max shown overloads stolen from |
| 1023 | // OverloadCandidateSet::NoteCandidates. |
| 1024 | if (ShownOverloads >= 4 && |
John McCall | 6dbba4f | 2011-10-11 23:14:30 +0000 | [diff] [blame] | 1025 | S.Diags.getShowOverloads() == DiagnosticsEngine::Ovl_Best) { |
Matt Beaumont-Gay | c9366ba | 2011-05-04 22:10:40 +0000 | [diff] [blame] | 1026 | ++SuppressedOverloads; |
| 1027 | continue; |
| 1028 | } |
John McCall | 6dbba4f | 2011-10-11 23:14:30 +0000 | [diff] [blame] | 1029 | |
| 1030 | NamedDecl *Fn = (*It)->getUnderlyingDecl(); |
Abramo Bagnara | 9c0e1ec | 2011-11-15 21:43:28 +0000 | [diff] [blame] | 1031 | S.Diag(Fn->getLocation(), diag::note_possible_target_of_call); |
Matt Beaumont-Gay | c9366ba | 2011-05-04 22:10:40 +0000 | [diff] [blame] | 1032 | ++ShownOverloads; |
| 1033 | } |
John McCall | 6dbba4f | 2011-10-11 23:14:30 +0000 | [diff] [blame] | 1034 | |
Matt Beaumont-Gay | c9366ba | 2011-05-04 22:10:40 +0000 | [diff] [blame] | 1035 | if (SuppressedOverloads) |
John McCall | 6dbba4f | 2011-10-11 23:14:30 +0000 | [diff] [blame] | 1036 | S.Diag(FinalNoteLoc, diag::note_ovl_too_many_candidates) |
| 1037 | << SuppressedOverloads; |
| 1038 | } |
| 1039 | |
| 1040 | static void notePlausibleOverloads(Sema &S, SourceLocation Loc, |
| 1041 | const UnresolvedSetImpl &Overloads, |
| 1042 | bool (*IsPlausibleResult)(QualType)) { |
| 1043 | if (!IsPlausibleResult) |
| 1044 | return noteOverloads(S, Overloads, Loc); |
| 1045 | |
| 1046 | UnresolvedSet<2> PlausibleOverloads; |
| 1047 | for (OverloadExpr::decls_iterator It = Overloads.begin(), |
| 1048 | DeclsEnd = Overloads.end(); It != DeclsEnd; ++It) { |
| 1049 | const FunctionDecl *OverloadDecl = cast<FunctionDecl>(*It); |
| 1050 | QualType OverloadResultTy = OverloadDecl->getResultType(); |
| 1051 | if (IsPlausibleResult(OverloadResultTy)) |
| 1052 | PlausibleOverloads.addDecl(It.getDecl()); |
| 1053 | } |
| 1054 | noteOverloads(S, PlausibleOverloads, Loc); |
| 1055 | } |
| 1056 | |
| 1057 | /// Determine whether the given expression can be called by just |
| 1058 | /// putting parentheses after it. Notably, expressions with unary |
| 1059 | /// operators can't be because the unary operator will start parsing |
| 1060 | /// outside the call. |
| 1061 | static bool IsCallableWithAppend(Expr *E) { |
| 1062 | E = E->IgnoreImplicit(); |
| 1063 | return (!isa<CStyleCastExpr>(E) && |
| 1064 | !isa<UnaryOperator>(E) && |
| 1065 | !isa<BinaryOperator>(E) && |
| 1066 | !isa<CXXOperatorCallExpr>(E)); |
| 1067 | } |
| 1068 | |
| 1069 | bool Sema::tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD, |
| 1070 | bool ForceComplain, |
| 1071 | bool (*IsPlausibleResult)(QualType)) { |
| 1072 | SourceLocation Loc = E.get()->getExprLoc(); |
| 1073 | SourceRange Range = E.get()->getSourceRange(); |
| 1074 | |
| 1075 | QualType ZeroArgCallTy; |
| 1076 | UnresolvedSet<4> Overloads; |
| 1077 | if (isExprCallable(*E.get(), ZeroArgCallTy, Overloads) && |
| 1078 | !ZeroArgCallTy.isNull() && |
| 1079 | (!IsPlausibleResult || IsPlausibleResult(ZeroArgCallTy))) { |
| 1080 | // At this point, we know E is potentially callable with 0 |
| 1081 | // arguments and that it returns something of a reasonable type, |
| 1082 | // so we can emit a fixit and carry on pretending that E was |
| 1083 | // actually a CallExpr. |
| 1084 | SourceLocation ParenInsertionLoc = |
| 1085 | PP.getLocForEndOfToken(Range.getEnd()); |
| 1086 | Diag(Loc, PD) |
| 1087 | << /*zero-arg*/ 1 << Range |
| 1088 | << (IsCallableWithAppend(E.get()) |
| 1089 | ? FixItHint::CreateInsertion(ParenInsertionLoc, "()") |
| 1090 | : FixItHint()); |
| 1091 | notePlausibleOverloads(*this, Loc, Overloads, IsPlausibleResult); |
| 1092 | |
| 1093 | // FIXME: Try this before emitting the fixit, and suppress diagnostics |
| 1094 | // while doing so. |
| 1095 | E = ActOnCallExpr(0, E.take(), ParenInsertionLoc, |
| 1096 | MultiExprArg(*this, 0, 0), |
| 1097 | ParenInsertionLoc.getLocWithOffset(1)); |
| 1098 | return true; |
| 1099 | } |
| 1100 | |
| 1101 | if (!ForceComplain) return false; |
| 1102 | |
| 1103 | Diag(Loc, PD) << /*not zero-arg*/ 0 << Range; |
| 1104 | notePlausibleOverloads(*this, Loc, Overloads, IsPlausibleResult); |
| 1105 | E = ExprError(); |
| 1106 | return true; |
Matt Beaumont-Gay | c9366ba | 2011-05-04 22:10:40 +0000 | [diff] [blame] | 1107 | } |