Sema.h revision 6a26e2e54aa2a8cc6c977081befd8e80e7573ca4
1ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com//===--- Sema.h - Semantic Analysis & AST Building --------------*- C++ -*-===// 28a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com// 3ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com// The LLVM Compiler Infrastructure 48a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com// 5ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com// This file is distributed under the University of Illinois Open Source 6ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com// License. See LICENSE.TXT for details. 78a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com// 88a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com//===----------------------------------------------------------------------===// 9ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com// 108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com// This file defines the Sema class, which performs semantic analysis and 118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com// builds ASTs. 128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com// 1318dc47731f4b37d8896b51f1b92ab31abd78b5a0reed@google.com//===----------------------------------------------------------------------===// 148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#ifndef LLVM_CLANG_SEMA_SEMA_H 168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#define LLVM_CLANG_SEMA_SEMA_H 178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "clang/Sema/Ownership.h" 198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "clang/Sema/AnalysisBasedWarnings.h" 208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "clang/Sema/IdentifierResolver.h" 218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "clang/Sema/ObjCMethodList.h" 226b919c353727f72342a20a7aa4ded9c022f5d816mike@reedtribe.org#include "clang/Sema/DeclSpec.h" 238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "clang/Sema/ExternalSemaSource.h" 248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "clang/Sema/LocInfoType.h" 256b919c353727f72342a20a7aa4ded9c022f5d816mike@reedtribe.org#include "clang/Sema/TypoCorrection.h" 266b919c353727f72342a20a7aa4ded9c022f5d816mike@reedtribe.org#include "clang/Sema/Weak.h" 278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "clang/AST/Expr.h" 288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "clang/AST/ExprObjC.h" 298a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "clang/AST/DeclarationName.h" 308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "clang/AST/ExternalASTSource.h" 318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "clang/AST/TypeLoc.h" 328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "clang/AST/NSAPI.h" 338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "clang/Lex/ModuleLoader.h" 348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "clang/Basic/Specifiers.h" 358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "clang/Basic/TemplateKinds.h" 368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "clang/Basic/TypeTraits.h" 378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "clang/Basic/ExpressionTraits.h" 388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "llvm/ADT/ArrayRef.h" 398a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "llvm/ADT/OwningPtr.h" 408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "llvm/ADT/SmallPtrSet.h" 418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "llvm/ADT/SmallVector.h" 428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include <deque> 438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include <string> 448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comnamespace llvm { 468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com class APSInt; 478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com template <typename ValueT> struct DenseMapInfo; 488a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com template <typename ValueT, typename ValueInfoT> class DenseSet; 498a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com class SmallBitVector; 508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comnamespace clang { 538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com class ADLResult; 548a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com class ASTConsumer; 558a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com class ASTContext; 5618dc47731f4b37d8896b51f1b92ab31abd78b5a0reed@google.com class ASTMutationListener; 5718dc47731f4b37d8896b51f1b92ab31abd78b5a0reed@google.com class ASTReader; 588a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com class ASTWriter; 598a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com class ArrayType; 608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com class AttributeList; 618a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com class BlockDecl; 6218dc47731f4b37d8896b51f1b92ab31abd78b5a0reed@google.com class CXXBasePath; 6318dc47731f4b37d8896b51f1b92ab31abd78b5a0reed@google.com class CXXBasePaths; 6418dc47731f4b37d8896b51f1b92ab31abd78b5a0reed@google.com class CXXBindTemporaryExpr; 6518dc47731f4b37d8896b51f1b92ab31abd78b5a0reed@google.com typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 6618dc47731f4b37d8896b51f1b92ab31abd78b5a0reed@google.com class CXXConstructorDecl; 6718dc47731f4b37d8896b51f1b92ab31abd78b5a0reed@google.com class CXXConversionDecl; 6818dc47731f4b37d8896b51f1b92ab31abd78b5a0reed@google.com class CXXDestructorDecl; 6918dc47731f4b37d8896b51f1b92ab31abd78b5a0reed@google.com class CXXFieldCollector; 7018dc47731f4b37d8896b51f1b92ab31abd78b5a0reed@google.com class CXXMemberCallExpr; 7118dc47731f4b37d8896b51f1b92ab31abd78b5a0reed@google.com class CXXMethodDecl; 7218dc47731f4b37d8896b51f1b92ab31abd78b5a0reed@google.com class CXXScopeSpec; 7318dc47731f4b37d8896b51f1b92ab31abd78b5a0reed@google.com class CXXTemporary; 7418dc47731f4b37d8896b51f1b92ab31abd78b5a0reed@google.com class CXXTryStmt; 7518dc47731f4b37d8896b51f1b92ab31abd78b5a0reed@google.com class CallExpr; 7618dc47731f4b37d8896b51f1b92ab31abd78b5a0reed@google.com class ClassTemplateDecl; 7718dc47731f4b37d8896b51f1b92ab31abd78b5a0reed@google.com class ClassTemplatePartialSpecializationDecl; 7818dc47731f4b37d8896b51f1b92ab31abd78b5a0reed@google.com class ClassTemplateSpecializationDecl; 7918dc47731f4b37d8896b51f1b92ab31abd78b5a0reed@google.com class CodeCompleteConsumer; 8018dc47731f4b37d8896b51f1b92ab31abd78b5a0reed@google.com class CodeCompletionAllocator; 8118dc47731f4b37d8896b51f1b92ab31abd78b5a0reed@google.com class CodeCompletionTUInfo; 8218dc47731f4b37d8896b51f1b92ab31abd78b5a0reed@google.com class CodeCompletionResult; 8318dc47731f4b37d8896b51f1b92ab31abd78b5a0reed@google.com class Decl; 8418dc47731f4b37d8896b51f1b92ab31abd78b5a0reed@google.com class DeclAccessPair; 8518dc47731f4b37d8896b51f1b92ab31abd78b5a0reed@google.com class DeclContext; 868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com class DeclRefExpr; 87 class DeclaratorDecl; 88 class DeducedTemplateArgument; 89 class DependentDiagnostic; 90 class DesignatedInitExpr; 91 class Designation; 92 class EnumConstantDecl; 93 class Expr; 94 class ExtVectorType; 95 class ExternalSemaSource; 96 class FormatAttr; 97 class FriendDecl; 98 class FunctionDecl; 99 class FunctionProtoType; 100 class FunctionTemplateDecl; 101 class ImplicitConversionSequence; 102 class InitListExpr; 103 class InitializationKind; 104 class InitializationSequence; 105 class InitializedEntity; 106 class IntegerLiteral; 107 class LabelStmt; 108 class LambdaExpr; 109 class LangOptions; 110 class LocalInstantiationScope; 111 class LookupResult; 112 class MacroInfo; 113 class MultiLevelTemplateArgumentList; 114 class NamedDecl; 115 class NonNullAttr; 116 class ObjCCategoryDecl; 117 class ObjCCategoryImplDecl; 118 class ObjCCompatibleAliasDecl; 119 class ObjCContainerDecl; 120 class ObjCImplDecl; 121 class ObjCImplementationDecl; 122 class ObjCInterfaceDecl; 123 class ObjCIvarDecl; 124 template <class T> class ObjCList; 125 class ObjCMessageExpr; 126 class ObjCMethodDecl; 127 class ObjCPropertyDecl; 128 class ObjCProtocolDecl; 129 class OverloadCandidateSet; 130 class OverloadExpr; 131 class ParenListExpr; 132 class ParmVarDecl; 133 class Preprocessor; 134 class PseudoDestructorTypeStorage; 135 class PseudoObjectExpr; 136 class QualType; 137 class StandardConversionSequence; 138 class Stmt; 139 class StringLiteral; 140 class SwitchStmt; 141 class TargetAttributesSema; 142 class TemplateArgument; 143 class TemplateArgumentList; 144 class TemplateArgumentLoc; 145 class TemplateDecl; 146 class TemplateParameterList; 147 class TemplatePartialOrderingContext; 148 class TemplateTemplateParmDecl; 149 class Token; 150 class TypeAliasDecl; 151 class TypedefDecl; 152 class TypedefNameDecl; 153 class TypeLoc; 154 class UnqualifiedId; 155 class UnresolvedLookupExpr; 156 class UnresolvedMemberExpr; 157 class UnresolvedSetImpl; 158 class UnresolvedSetIterator; 159 class UsingDecl; 160 class UsingShadowDecl; 161 class ValueDecl; 162 class VarDecl; 163 class VisibilityAttr; 164 class VisibleDeclConsumer; 165 class IndirectFieldDecl; 166 167namespace sema { 168 class AccessedEntity; 169 class BlockScopeInfo; 170 class CompoundScopeInfo; 171 class DelayedDiagnostic; 172 class FunctionScopeInfo; 173 class LambdaScopeInfo; 174 class PossiblyUnreachableDiag; 175 class TemplateDeductionInfo; 176} 177 178// FIXME: No way to easily map from TemplateTypeParmTypes to 179// TemplateTypeParmDecls, so we have this horrible PointerUnion. 180typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 181 SourceLocation> UnexpandedParameterPack; 182 183/// Sema - This implements semantic analysis and AST building for C. 184class Sema { 185 Sema(const Sema&); // DO NOT IMPLEMENT 186 void operator=(const Sema&); // DO NOT IMPLEMENT 187 mutable const TargetAttributesSema* TheTargetAttributesSema; 188public: 189 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 190 typedef OpaquePtr<TemplateName> TemplateTy; 191 typedef OpaquePtr<QualType> TypeTy; 192 193 OpenCLOptions OpenCLFeatures; 194 FPOptions FPFeatures; 195 196 const LangOptions &LangOpts; 197 Preprocessor &PP; 198 ASTContext &Context; 199 ASTConsumer &Consumer; 200 DiagnosticsEngine &Diags; 201 SourceManager &SourceMgr; 202 203 /// \brief Flag indicating whether or not to collect detailed statistics. 204 bool CollectStats; 205 206 /// \brief Source of additional semantic information. 207 ExternalSemaSource *ExternalSource; 208 209 /// \brief Code-completion consumer. 210 CodeCompleteConsumer *CodeCompleter; 211 212 /// CurContext - This is the current declaration context of parsing. 213 DeclContext *CurContext; 214 215 /// \brief Generally null except when we temporarily switch decl contexts, 216 /// like in \see ActOnObjCTemporaryExitContainerContext. 217 DeclContext *OriginalLexicalContext; 218 219 /// VAListTagName - The declaration name corresponding to __va_list_tag. 220 /// This is used as part of a hack to omit that class from ADL results. 221 DeclarationName VAListTagName; 222 223 /// PackContext - Manages the stack for #pragma pack. An alignment 224 /// of 0 indicates default alignment. 225 void *PackContext; // Really a "PragmaPackStack*" 226 227 bool MSStructPragmaOn; // True when #pragma ms_struct on 228 229 /// VisContext - Manages the stack for #pragma GCC visibility. 230 void *VisContext; // Really a "PragmaVisStack*" 231 232 /// ExprNeedsCleanups - True if the current evaluation context 233 /// requires cleanups to be run at its conclusion. 234 bool ExprNeedsCleanups; 235 236 /// ExprCleanupObjects - This is the stack of objects requiring 237 /// cleanup that are created by the current full expression. The 238 /// element type here is ExprWithCleanups::Object. 239 SmallVector<BlockDecl*, 8> ExprCleanupObjects; 240 241 llvm::SmallPtrSet<Expr*, 8> MaybeODRUseExprs; 242 243 /// \brief Stack containing information about each of the nested 244 /// function, block, and method scopes that are currently active. 245 /// 246 /// This array is never empty. Clients should ignore the first 247 /// element, which is used to cache a single FunctionScopeInfo 248 /// that's used to parse every top-level function. 249 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 250 251 typedef LazyVector<TypedefNameDecl *, ExternalSemaSource, 252 &ExternalSemaSource::ReadExtVectorDecls, 2, 2> 253 ExtVectorDeclsType; 254 255 /// ExtVectorDecls - This is a list all the extended vector types. This allows 256 /// us to associate a raw vector type with one of the ext_vector type names. 257 /// This is only necessary for issuing pretty diagnostics. 258 ExtVectorDeclsType ExtVectorDecls; 259 260 /// \brief The set of types for which we have already complained about the 261 /// definitions being hidden. 262 /// 263 /// This set is used to suppress redundant diagnostics. 264 llvm::SmallPtrSet<NamedDecl *, 4> HiddenDefinitions; 265 266 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 267 OwningPtr<CXXFieldCollector> FieldCollector; 268 269 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 270 271 /// PureVirtualClassDiagSet - a set of class declarations which we have 272 /// emitted a list of pure virtual functions. Used to prevent emitting the 273 /// same list more than once. 274 OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 275 276 /// ParsingInitForAutoVars - a set of declarations with auto types for which 277 /// we are currently parsing the initializer. 278 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 279 280 /// \brief A mapping from external names to the most recent 281 /// locally-scoped external declaration with that name. 282 /// 283 /// This map contains external declarations introduced in local 284 /// scoped, e.g., 285 /// 286 /// \code 287 /// void f() { 288 /// void foo(int, int); 289 /// } 290 /// \endcode 291 /// 292 /// Here, the name "foo" will be associated with the declaration on 293 /// "foo" within f. This name is not visible outside of 294 /// "f". However, we still find it in two cases: 295 /// 296 /// - If we are declaring another external with the name "foo", we 297 /// can find "foo" as a previous declaration, so that the types 298 /// of this external declaration can be checked for 299 /// compatibility. 300 /// 301 /// - If we would implicitly declare "foo" (e.g., due to a call to 302 /// "foo" in C when no prototype or definition is visible), then 303 /// we find this declaration of "foo" and complain that it is 304 /// not visible. 305 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 306 307 /// \brief Look for a locally scoped external declaration by the given name. 308 llvm::DenseMap<DeclarationName, NamedDecl *>::iterator 309 findLocallyScopedExternalDecl(DeclarationName Name); 310 311 typedef LazyVector<VarDecl *, ExternalSemaSource, 312 &ExternalSemaSource::ReadTentativeDefinitions, 2, 2> 313 TentativeDefinitionsType; 314 315 /// \brief All the tentative definitions encountered in the TU. 316 TentativeDefinitionsType TentativeDefinitions; 317 318 typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource, 319 &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2> 320 UnusedFileScopedDeclsType; 321 322 /// \brief The set of file scoped decls seen so far that have not been used 323 /// and must warn if not used. Only contains the first declaration. 324 UnusedFileScopedDeclsType UnusedFileScopedDecls; 325 326 typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource, 327 &ExternalSemaSource::ReadDelegatingConstructors, 2, 2> 328 DelegatingCtorDeclsType; 329 330 /// \brief All the delegating constructors seen so far in the file, used for 331 /// cycle detection at the end of the TU. 332 DelegatingCtorDeclsType DelegatingCtorDecls; 333 334 /// \brief All the destructors seen during a class definition that had their 335 /// exception spec computation delayed because it depended on an unparsed 336 /// exception spec. 337 SmallVector<CXXDestructorDecl*, 2> DelayedDestructorExceptionSpecs; 338 339 /// \brief All the overriding destructors seen during a class definition 340 /// (there could be multiple due to nested classes) that had their exception 341 /// spec checks delayed, plus the overridden destructor. 342 SmallVector<std::pair<const CXXDestructorDecl*, 343 const CXXDestructorDecl*>, 2> 344 DelayedDestructorExceptionSpecChecks; 345 346 /// \brief Callback to the parser to parse templated functions when needed. 347 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 348 LateTemplateParserCB *LateTemplateParser; 349 void *OpaqueParser; 350 351 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 352 LateTemplateParser = LTP; 353 OpaqueParser = P; 354 } 355 356 class DelayedDiagnostics; 357 358 class ParsingDeclState { 359 unsigned SavedStackSize; 360 friend class Sema::DelayedDiagnostics; 361 }; 362 363 class ProcessingContextState { 364 unsigned SavedParsingDepth; 365 unsigned SavedActiveStackBase; 366 friend class Sema::DelayedDiagnostics; 367 }; 368 369 /// A class which encapsulates the logic for delaying diagnostics 370 /// during parsing and other processing. 371 class DelayedDiagnostics { 372 /// \brief The stack of diagnostics that were delayed due to being 373 /// produced during the parsing of a declaration. 374 sema::DelayedDiagnostic *Stack; 375 376 /// \brief The number of objects on the delayed-diagnostics stack. 377 unsigned StackSize; 378 379 /// \brief The current capacity of the delayed-diagnostics stack. 380 unsigned StackCapacity; 381 382 /// \brief The index of the first "active" delayed diagnostic in 383 /// the stack. When parsing class definitions, we ignore active 384 /// delayed diagnostics from the surrounding context. 385 unsigned ActiveStackBase; 386 387 /// \brief The depth of the declarations we're currently parsing. 388 /// This gets saved and reset whenever we enter a class definition. 389 unsigned ParsingDepth; 390 391 public: 392 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 393 ActiveStackBase(0), ParsingDepth(0) {} 394 395 ~DelayedDiagnostics() { 396 delete[] reinterpret_cast<char*>(Stack); 397 } 398 399 /// Adds a delayed diagnostic. 400 void add(const sema::DelayedDiagnostic &diag); 401 402 /// Determines whether diagnostics should be delayed. 403 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 404 405 /// Observe that we've started parsing a declaration. Access and 406 /// deprecation diagnostics will be delayed; when the declaration 407 /// is completed, all active delayed diagnostics will be evaluated 408 /// in its context, and then active diagnostics stack will be 409 /// popped down to the saved depth. 410 ParsingDeclState pushParsingDecl() { 411 ParsingDepth++; 412 413 ParsingDeclState state; 414 state.SavedStackSize = StackSize; 415 return state; 416 } 417 418 /// Observe that we're completed parsing a declaration. 419 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 420 421 /// Observe that we've started processing a different context, the 422 /// contents of which are semantically separate from the 423 /// declarations it may lexically appear in. This sets aside the 424 /// current stack of active diagnostics and starts afresh. 425 ProcessingContextState pushContext() { 426 assert(StackSize >= ActiveStackBase); 427 428 ProcessingContextState state; 429 state.SavedParsingDepth = ParsingDepth; 430 state.SavedActiveStackBase = ActiveStackBase; 431 432 ActiveStackBase = StackSize; 433 ParsingDepth = 0; 434 435 return state; 436 } 437 438 /// Observe that we've stopped processing a context. This 439 /// restores the previous stack of active diagnostics. 440 void popContext(ProcessingContextState state) { 441 assert(ActiveStackBase == StackSize); 442 assert(ParsingDepth == 0); 443 ActiveStackBase = state.SavedActiveStackBase; 444 ParsingDepth = state.SavedParsingDepth; 445 } 446 } DelayedDiagnostics; 447 448 /// A RAII object to temporarily push a declaration context. 449 class ContextRAII { 450 private: 451 Sema &S; 452 DeclContext *SavedContext; 453 ProcessingContextState SavedContextState; 454 QualType SavedCXXThisTypeOverride; 455 456 public: 457 ContextRAII(Sema &S, DeclContext *ContextToPush) 458 : S(S), SavedContext(S.CurContext), 459 SavedContextState(S.DelayedDiagnostics.pushContext()), 460 SavedCXXThisTypeOverride(S.CXXThisTypeOverride) 461 { 462 assert(ContextToPush && "pushing null context"); 463 S.CurContext = ContextToPush; 464 } 465 466 void pop() { 467 if (!SavedContext) return; 468 S.CurContext = SavedContext; 469 S.DelayedDiagnostics.popContext(SavedContextState); 470 S.CXXThisTypeOverride = SavedCXXThisTypeOverride; 471 SavedContext = 0; 472 } 473 474 ~ContextRAII() { 475 pop(); 476 } 477 }; 478 479 /// WeakUndeclaredIdentifiers - Identifiers contained in 480 /// #pragma weak before declared. rare. may alias another 481 /// identifier, declared or undeclared 482 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 483 484 /// ExtnameUndeclaredIdentifiers - Identifiers contained in 485 /// #pragma redefine_extname before declared. Used in Solaris system headers 486 /// to define functions that occur in multiple standards to call the version 487 /// in the currently selected standard. 488 llvm::DenseMap<IdentifierInfo*,AsmLabelAttr*> ExtnameUndeclaredIdentifiers; 489 490 491 /// \brief Load weak undeclared identifiers from the external source. 492 void LoadExternalWeakUndeclaredIdentifiers(); 493 494 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 495 /// #pragma weak during processing of other Decls. 496 /// I couldn't figure out a clean way to generate these in-line, so 497 /// we store them here and handle separately -- which is a hack. 498 /// It would be best to refactor this. 499 SmallVector<Decl*,2> WeakTopLevelDecl; 500 501 IdentifierResolver IdResolver; 502 503 /// Translation Unit Scope - useful to Objective-C actions that need 504 /// to lookup file scope declarations in the "ordinary" C decl namespace. 505 /// For example, user-defined classes, built-in "id" type, etc. 506 Scope *TUScope; 507 508 /// \brief The C++ "std" namespace, where the standard library resides. 509 LazyDeclPtr StdNamespace; 510 511 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 512 /// standard library. 513 LazyDeclPtr StdBadAlloc; 514 515 /// \brief The C++ "std::initializer_list" template, which is defined in 516 /// <initializer_list>. 517 ClassTemplateDecl *StdInitializerList; 518 519 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 520 RecordDecl *CXXTypeInfoDecl; 521 522 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 523 RecordDecl *MSVCGuidDecl; 524 525 /// \brief Caches identifiers/selectors for NSFoundation APIs. 526 llvm::OwningPtr<NSAPI> NSAPIObj; 527 528 /// \brief The declaration of the Objective-C NSNumber class. 529 ObjCInterfaceDecl *NSNumberDecl; 530 531 /// \brief Pointer to NSNumber type (NSNumber *). 532 QualType NSNumberPointer; 533 534 /// \brief The Objective-C NSNumber methods used to create NSNumber literals. 535 ObjCMethodDecl *NSNumberLiteralMethods[NSAPI::NumNSNumberLiteralMethods]; 536 537 /// \brief The declaration of the Objective-C NSString class. 538 ObjCInterfaceDecl *NSStringDecl; 539 540 /// \brief Pointer to NSString type (NSString *). 541 QualType NSStringPointer; 542 543 /// \brief The declaration of the stringWithUTF8String: method. 544 ObjCMethodDecl *StringWithUTF8StringMethod; 545 546 /// \brief The declaration of the Objective-C NSArray class. 547 ObjCInterfaceDecl *NSArrayDecl; 548 549 /// \brief The declaration of the arrayWithObjects:count: method. 550 ObjCMethodDecl *ArrayWithObjectsMethod; 551 552 /// \brief The declaration of the Objective-C NSDictionary class. 553 ObjCInterfaceDecl *NSDictionaryDecl; 554 555 /// \brief The declaration of the dictionaryWithObjects:forKeys:count: method. 556 ObjCMethodDecl *DictionaryWithObjectsMethod; 557 558 /// \brief id<NSCopying> type. 559 QualType QIDNSCopying; 560 561 /// A flag to remember whether the implicit forms of operator new and delete 562 /// have been declared. 563 bool GlobalNewDeleteDeclared; 564 565 /// A flag that is set when parsing a -dealloc method and no [super dealloc] 566 /// call was found yet. 567 bool ObjCShouldCallSuperDealloc; 568 /// A flag that is set when parsing a -finalize method and no [super finalize] 569 /// call was found yet. 570 bool ObjCShouldCallSuperFinalize; 571 572 /// \brief Describes how the expressions currently being parsed are 573 /// evaluated at run-time, if at all. 574 enum ExpressionEvaluationContext { 575 /// \brief The current expression and its subexpressions occur within an 576 /// unevaluated operand (C++11 [expr]p7), such as the subexpression of 577 /// \c sizeof, where the type of the expression may be significant but 578 /// no code will be generated to evaluate the value of the expression at 579 /// run time. 580 Unevaluated, 581 582 /// \brief The current context is "potentially evaluated" in C++11 terms, 583 /// but the expression is evaluated at compile-time (like the values of 584 /// cases in a switch statment). 585 ConstantEvaluated, 586 587 /// \brief The current expression is potentially evaluated at run time, 588 /// which means that code may be generated to evaluate the value of the 589 /// expression at run time. 590 PotentiallyEvaluated, 591 592 /// \brief The current expression is potentially evaluated, but any 593 /// declarations referenced inside that expression are only used if 594 /// in fact the current expression is used. 595 /// 596 /// This value is used when parsing default function arguments, for which 597 /// we would like to provide diagnostics (e.g., passing non-POD arguments 598 /// through varargs) but do not want to mark declarations as "referenced" 599 /// until the default argument is used. 600 PotentiallyEvaluatedIfUsed 601 }; 602 603 /// \brief Data structure used to record current or nested 604 /// expression evaluation contexts. 605 struct ExpressionEvaluationContextRecord { 606 /// \brief The expression evaluation context. 607 ExpressionEvaluationContext Context; 608 609 /// \brief Whether the enclosing context needed a cleanup. 610 bool ParentNeedsCleanups; 611 612 /// \brief Whether we are in a decltype expression. 613 bool IsDecltype; 614 615 /// \brief The number of active cleanup objects when we entered 616 /// this expression evaluation context. 617 unsigned NumCleanupObjects; 618 619 llvm::SmallPtrSet<Expr*, 8> SavedMaybeODRUseExprs; 620 621 /// \brief The lambdas that are present within this context, if it 622 /// is indeed an unevaluated context. 623 llvm::SmallVector<LambdaExpr *, 2> Lambdas; 624 625 /// \brief The declaration that provides context for the lambda expression 626 /// if the normal declaration context does not suffice, e.g., in a 627 /// default function argument. 628 Decl *LambdaContextDecl; 629 630 /// \brief The context information used to mangle lambda expressions 631 /// within this context. 632 /// 633 /// This mangling information is allocated lazily, since most contexts 634 /// do not have lambda expressions. 635 LambdaMangleContext *LambdaMangle; 636 637 /// \brief If we are processing a decltype type, a set of call expressions 638 /// for which we have deferred checking the completeness of the return type. 639 llvm::SmallVector<CallExpr*, 8> DelayedDecltypeCalls; 640 641 /// \brief If we are processing a decltype type, a set of temporary binding 642 /// expressions for which we have deferred checking the destructor. 643 llvm::SmallVector<CXXBindTemporaryExpr*, 8> DelayedDecltypeBinds; 644 645 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 646 unsigned NumCleanupObjects, 647 bool ParentNeedsCleanups, 648 Decl *LambdaContextDecl, 649 bool IsDecltype) 650 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups), 651 IsDecltype(IsDecltype), NumCleanupObjects(NumCleanupObjects), 652 LambdaContextDecl(LambdaContextDecl), LambdaMangle() { } 653 654 ~ExpressionEvaluationContextRecord() { 655 delete LambdaMangle; 656 } 657 658 /// \brief Retrieve the mangling context for lambdas. 659 LambdaMangleContext &getLambdaMangleContext() { 660 assert(LambdaContextDecl && "Need to have a lambda context declaration"); 661 if (!LambdaMangle) 662 LambdaMangle = new LambdaMangleContext; 663 return *LambdaMangle; 664 } 665 }; 666 667 /// A stack of expression evaluation contexts. 668 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 669 670 /// SpecialMemberOverloadResult - The overloading result for a special member 671 /// function. 672 /// 673 /// This is basically a wrapper around PointerIntPair. The lowest bits of the 674 /// integer are used to determine whether overload resolution succeeded. 675 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 676 public: 677 enum Kind { 678 NoMemberOrDeleted, 679 Ambiguous, 680 Success 681 }; 682 683 private: 684 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 685 686 public: 687 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 688 : FastFoldingSetNode(ID) 689 {} 690 691 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 692 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 693 694 Kind getKind() const { return static_cast<Kind>(Pair.getInt()); } 695 void setKind(Kind K) { Pair.setInt(K); } 696 }; 697 698 /// \brief A cache of special member function overload resolution results 699 /// for C++ records. 700 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 701 702 /// \brief The kind of translation unit we are processing. 703 /// 704 /// When we're processing a complete translation unit, Sema will perform 705 /// end-of-translation-unit semantic tasks (such as creating 706 /// initializers for tentative definitions in C) once parsing has 707 /// completed. Modules and precompiled headers perform different kinds of 708 /// checks. 709 TranslationUnitKind TUKind; 710 711 llvm::BumpPtrAllocator BumpAlloc; 712 713 /// \brief The number of SFINAE diagnostics that have been trapped. 714 unsigned NumSFINAEErrors; 715 716 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> > 717 UnparsedDefaultArgInstantiationsMap; 718 719 /// \brief A mapping from parameters with unparsed default arguments to the 720 /// set of instantiations of each parameter. 721 /// 722 /// This mapping is a temporary data structure used when parsing 723 /// nested class templates or nested classes of class templates, 724 /// where we might end up instantiating an inner class before the 725 /// default arguments of its methods have been parsed. 726 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 727 728 // Contains the locations of the beginning of unparsed default 729 // argument locations. 730 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 731 732 /// UndefinedInternals - all the used, undefined objects with 733 /// internal linkage in this translation unit. 734 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 735 736 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 737 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 738 739 /// Method Pool - allows efficient lookup when typechecking messages to "id". 740 /// We need to maintain a list, since selectors can have differing signatures 741 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 742 /// of selectors are "overloaded"). 743 GlobalMethodPool MethodPool; 744 745 /// Method selectors used in a @selector expression. Used for implementation 746 /// of -Wselector. 747 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 748 749 void ReadMethodPool(Selector Sel); 750 751 /// Private Helper predicate to check for 'self'. 752 bool isSelfExpr(Expr *RExpr); 753 754 /// \brief Cause the active diagnostic on the DiagosticsEngine to be 755 /// emitted. This is closely coupled to the SemaDiagnosticBuilder class and 756 /// should not be used elsewhere. 757 void EmitCurrentDiagnostic(unsigned DiagID); 758 759public: 760 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 761 TranslationUnitKind TUKind = TU_Complete, 762 CodeCompleteConsumer *CompletionConsumer = 0); 763 ~Sema(); 764 765 /// \brief Perform initialization that occurs after the parser has been 766 /// initialized but before it parses anything. 767 void Initialize(); 768 769 const LangOptions &getLangOpts() const { return LangOpts; } 770 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 771 FPOptions &getFPOptions() { return FPFeatures; } 772 773 DiagnosticsEngine &getDiagnostics() const { return Diags; } 774 SourceManager &getSourceManager() const { return SourceMgr; } 775 const TargetAttributesSema &getTargetAttributesSema() const; 776 Preprocessor &getPreprocessor() const { return PP; } 777 ASTContext &getASTContext() const { return Context; } 778 ASTConsumer &getASTConsumer() const { return Consumer; } 779 ASTMutationListener *getASTMutationListener() const; 780 781 void PrintStats() const; 782 783 /// \brief Helper class that creates diagnostics with optional 784 /// template instantiation stacks. 785 /// 786 /// This class provides a wrapper around the basic DiagnosticBuilder 787 /// class that emits diagnostics. SemaDiagnosticBuilder is 788 /// responsible for emitting the diagnostic (as DiagnosticBuilder 789 /// does) and, if the diagnostic comes from inside a template 790 /// instantiation, printing the template instantiation stack as 791 /// well. 792 class SemaDiagnosticBuilder : public DiagnosticBuilder { 793 Sema &SemaRef; 794 unsigned DiagID; 795 796 public: 797 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 798 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 799 800 ~SemaDiagnosticBuilder() { 801 // If we aren't active, there is nothing to do. 802 if (!isActive()) return; 803 804 // Otherwise, we need to emit the diagnostic. First flush the underlying 805 // DiagnosticBuilder data, and clear the diagnostic builder itself so it 806 // won't emit the diagnostic in its own destructor. 807 // 808 // This seems wasteful, in that as written the DiagnosticBuilder dtor will 809 // do its own needless checks to see if the diagnostic needs to be 810 // emitted. However, because we take care to ensure that the builder 811 // objects never escape, a sufficiently smart compiler will be able to 812 // eliminate that code. 813 FlushCounts(); 814 Clear(); 815 816 // Dispatch to Sema to emit the diagnostic. 817 SemaRef.EmitCurrentDiagnostic(DiagID); 818 } 819 }; 820 821 /// \brief Emit a diagnostic. 822 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID) { 823 DiagnosticBuilder DB = Diags.Report(Loc, DiagID); 824 return SemaDiagnosticBuilder(DB, *this, DiagID); 825 } 826 827 /// \brief Emit a partial diagnostic. 828 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 829 830 /// \brief Build a partial diagnostic. 831 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 832 833 bool findMacroSpelling(SourceLocation &loc, StringRef name); 834 835 /// \brief Get a string to suggest for zero-initialization of a type. 836 std::string getFixItZeroInitializerForType(QualType T) const; 837 std::string getFixItZeroLiteralForType(QualType T) const; 838 839 ExprResult Owned(Expr* E) { return E; } 840 ExprResult Owned(ExprResult R) { return R; } 841 StmtResult Owned(Stmt* S) { return S; } 842 843 void ActOnEndOfTranslationUnit(); 844 845 void CheckDelegatingCtorCycles(); 846 847 Scope *getScopeForContext(DeclContext *Ctx); 848 849 void PushFunctionScope(); 850 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 851 void PushLambdaScope(CXXRecordDecl *Lambda, CXXMethodDecl *CallOperator); 852 void PopFunctionScopeInfo(const sema::AnalysisBasedWarnings::Policy *WP =0, 853 const Decl *D = 0, const BlockExpr *blkExpr = 0); 854 855 sema::FunctionScopeInfo *getCurFunction() const { 856 return FunctionScopes.back(); 857 } 858 859 void PushCompoundScope(); 860 void PopCompoundScope(); 861 862 sema::CompoundScopeInfo &getCurCompoundScope() const; 863 864 bool hasAnyUnrecoverableErrorsInThisFunction() const; 865 866 /// \brief Retrieve the current block, if any. 867 sema::BlockScopeInfo *getCurBlock(); 868 869 /// \brief Retrieve the current lambda expression, if any. 870 sema::LambdaScopeInfo *getCurLambda(); 871 872 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 873 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 874 875 //===--------------------------------------------------------------------===// 876 // Type Analysis / Processing: SemaType.cpp. 877 // 878 879 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 880 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 881 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 882 } 883 QualType BuildPointerType(QualType T, 884 SourceLocation Loc, DeclarationName Entity); 885 QualType BuildReferenceType(QualType T, bool LValueRef, 886 SourceLocation Loc, DeclarationName Entity); 887 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 888 Expr *ArraySize, unsigned Quals, 889 SourceRange Brackets, DeclarationName Entity); 890 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 891 SourceLocation AttrLoc); 892 QualType BuildFunctionType(QualType T, 893 QualType *ParamTypes, unsigned NumParamTypes, 894 bool Variadic, bool HasTrailingReturn, 895 unsigned Quals, RefQualifierKind RefQualifier, 896 SourceLocation Loc, DeclarationName Entity, 897 FunctionType::ExtInfo Info); 898 QualType BuildMemberPointerType(QualType T, QualType Class, 899 SourceLocation Loc, 900 DeclarationName Entity); 901 QualType BuildBlockPointerType(QualType T, 902 SourceLocation Loc, DeclarationName Entity); 903 QualType BuildParenType(QualType T); 904 QualType BuildAtomicType(QualType T, SourceLocation Loc); 905 906 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); 907 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); 908 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 909 TypeSourceInfo *ReturnTypeInfo); 910 911 /// \brief Package the given type and TSI into a ParsedType. 912 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 913 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 914 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 915 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 916 CanThrowResult canThrow(const Expr *E); 917 const FunctionProtoType *ResolveExceptionSpec(SourceLocation Loc, 918 const FunctionProtoType *FPT); 919 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 920 bool CheckDistantExceptionSpec(QualType T); 921 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 922 bool CheckEquivalentExceptionSpec( 923 const FunctionProtoType *Old, SourceLocation OldLoc, 924 const FunctionProtoType *New, SourceLocation NewLoc); 925 bool CheckEquivalentExceptionSpec( 926 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 927 const FunctionProtoType *Old, SourceLocation OldLoc, 928 const FunctionProtoType *New, SourceLocation NewLoc, 929 bool *MissingExceptionSpecification = 0, 930 bool *MissingEmptyExceptionSpecification = 0, 931 bool AllowNoexceptAllMatchWithNoSpec = false, 932 bool IsOperatorNew = false); 933 bool CheckExceptionSpecSubset( 934 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 935 const FunctionProtoType *Superset, SourceLocation SuperLoc, 936 const FunctionProtoType *Subset, SourceLocation SubLoc); 937 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 938 const FunctionProtoType *Target, SourceLocation TargetLoc, 939 const FunctionProtoType *Source, SourceLocation SourceLoc); 940 941 TypeResult ActOnTypeName(Scope *S, Declarator &D); 942 943 /// \brief The parser has parsed the context-sensitive type 'instancetype' 944 /// in an Objective-C message declaration. Return the appropriate type. 945 ParsedType ActOnObjCInstanceType(SourceLocation Loc); 946 947 /// \brief Abstract class used to diagnose incomplete types. 948 struct TypeDiagnoser { 949 bool Suppressed; 950 951 TypeDiagnoser(bool Suppressed = false) : Suppressed(Suppressed) { } 952 953 virtual void diagnose(Sema &S, SourceLocation Loc, QualType T) = 0; 954 virtual ~TypeDiagnoser() {} 955 }; 956 957 static int getPrintable(int I) { return I; } 958 static unsigned getPrintable(unsigned I) { return I; } 959 static bool getPrintable(bool B) { return B; } 960 static const char * getPrintable(const char *S) { return S; } 961 static StringRef getPrintable(StringRef S) { return S; } 962 static const std::string &getPrintable(const std::string &S) { return S; } 963 static const IdentifierInfo *getPrintable(const IdentifierInfo *II) { 964 return II; 965 } 966 static DeclarationName getPrintable(DeclarationName N) { return N; } 967 static QualType getPrintable(QualType T) { return T; } 968 static SourceRange getPrintable(SourceRange R) { return R; } 969 static SourceRange getPrintable(SourceLocation L) { return L; } 970 static SourceRange getPrintable(Expr *E) { return E->getSourceRange(); } 971 static SourceRange getPrintable(TypeLoc TL) { return TL.getSourceRange();} 972 973 template<typename T1> 974 class BoundTypeDiagnoser1 : public TypeDiagnoser { 975 unsigned DiagID; 976 const T1 &Arg1; 977 978 public: 979 BoundTypeDiagnoser1(unsigned DiagID, const T1 &Arg1) 980 : TypeDiagnoser(DiagID == 0), DiagID(DiagID), Arg1(Arg1) { } 981 virtual void diagnose(Sema &S, SourceLocation Loc, QualType T) { 982 if (Suppressed) return; 983 S.Diag(Loc, DiagID) << getPrintable(Arg1) << T; 984 } 985 986 virtual ~BoundTypeDiagnoser1() { } 987 }; 988 989 template<typename T1, typename T2> 990 class BoundTypeDiagnoser2 : public TypeDiagnoser { 991 unsigned DiagID; 992 const T1 &Arg1; 993 const T2 &Arg2; 994 995 public: 996 BoundTypeDiagnoser2(unsigned DiagID, const T1 &Arg1, 997 const T2 &Arg2) 998 : TypeDiagnoser(DiagID == 0), DiagID(DiagID), Arg1(Arg1), 999 Arg2(Arg2) { } 1000 1001 virtual void diagnose(Sema &S, SourceLocation Loc, QualType T) { 1002 if (Suppressed) return; 1003 S.Diag(Loc, DiagID) << getPrintable(Arg1) << getPrintable(Arg2) << T; 1004 } 1005 1006 virtual ~BoundTypeDiagnoser2() { } 1007 }; 1008 1009 template<typename T1, typename T2, typename T3> 1010 class BoundTypeDiagnoser3 : public TypeDiagnoser { 1011 unsigned DiagID; 1012 const T1 &Arg1; 1013 const T2 &Arg2; 1014 const T3 &Arg3; 1015 1016 public: 1017 BoundTypeDiagnoser3(unsigned DiagID, const T1 &Arg1, 1018 const T2 &Arg2, const T3 &Arg3) 1019 : TypeDiagnoser(DiagID == 0), DiagID(DiagID), Arg1(Arg1), 1020 Arg2(Arg2), Arg3(Arg3) { } 1021 1022 virtual void diagnose(Sema &S, SourceLocation Loc, QualType T) { 1023 if (Suppressed) return; 1024 S.Diag(Loc, DiagID) 1025 << getPrintable(Arg1) << getPrintable(Arg2) << getPrintable(Arg3) << T; 1026 } 1027 1028 virtual ~BoundTypeDiagnoser3() { } 1029 }; 1030 1031 bool RequireCompleteType(SourceLocation Loc, QualType T, 1032 TypeDiagnoser &Diagnoser); 1033 bool RequireCompleteType(SourceLocation Loc, QualType T, 1034 unsigned DiagID); 1035 1036 template<typename T1> 1037 bool RequireCompleteType(SourceLocation Loc, QualType T, 1038 unsigned DiagID, const T1 &Arg1) { 1039 BoundTypeDiagnoser1<T1> Diagnoser(DiagID, Arg1); 1040 return RequireCompleteType(Loc, T, Diagnoser); 1041 } 1042 1043 template<typename T1, typename T2> 1044 bool RequireCompleteType(SourceLocation Loc, QualType T, 1045 unsigned DiagID, const T1 &Arg1, const T2 &Arg2) { 1046 BoundTypeDiagnoser2<T1, T2> Diagnoser(DiagID, Arg1, Arg2); 1047 return RequireCompleteType(Loc, T, Diagnoser); 1048 } 1049 1050 template<typename T1, typename T2, typename T3> 1051 bool RequireCompleteType(SourceLocation Loc, QualType T, 1052 unsigned DiagID, const T1 &Arg1, const T2 &Arg2, 1053 const T3 &Arg3) { 1054 BoundTypeDiagnoser3<T1, T2, T3> Diagnoser(DiagID, Arg1, Arg2, 1055 Arg3); 1056 return RequireCompleteType(Loc, T, Diagnoser); 1057 } 1058 1059 bool RequireCompleteExprType(Expr *E, TypeDiagnoser &Diagnoser); 1060 bool RequireCompleteExprType(Expr *E, unsigned DiagID); 1061 1062 template<typename T1> 1063 bool RequireCompleteExprType(Expr *E, unsigned DiagID, const T1 &Arg1) { 1064 BoundTypeDiagnoser1<T1> Diagnoser(DiagID, Arg1); 1065 return RequireCompleteExprType(E, Diagnoser); 1066 } 1067 1068 template<typename T1, typename T2> 1069 bool RequireCompleteExprType(Expr *E, unsigned DiagID, const T1 &Arg1, 1070 const T2 &Arg2) { 1071 BoundTypeDiagnoser2<T1, T2> Diagnoser(DiagID, Arg1, Arg2); 1072 return RequireCompleteExprType(E, Diagnoser); 1073 } 1074 1075 template<typename T1, typename T2, typename T3> 1076 bool RequireCompleteExprType(Expr *E, unsigned DiagID, const T1 &Arg1, 1077 const T2 &Arg2, const T3 &Arg3) { 1078 BoundTypeDiagnoser3<T1, T2, T3> Diagnoser(DiagID, Arg1, Arg2, 1079 Arg3); 1080 return RequireCompleteExprType(E, Diagnoser); 1081 } 1082 1083 bool RequireLiteralType(SourceLocation Loc, QualType T, 1084 TypeDiagnoser &Diagnoser); 1085 bool RequireLiteralType(SourceLocation Loc, QualType T, unsigned DiagID); 1086 1087 template<typename T1> 1088 bool RequireLiteralType(SourceLocation Loc, QualType T, 1089 unsigned DiagID, const T1 &Arg1) { 1090 BoundTypeDiagnoser1<T1> Diagnoser(DiagID, Arg1); 1091 return RequireLiteralType(Loc, T, Diagnoser); 1092 } 1093 1094 template<typename T1, typename T2> 1095 bool RequireLiteralType(SourceLocation Loc, QualType T, 1096 unsigned DiagID, const T1 &Arg1, const T2 &Arg2) { 1097 BoundTypeDiagnoser2<T1, T2> Diagnoser(DiagID, Arg1, Arg2); 1098 return RequireLiteralType(Loc, T, Diagnoser); 1099 } 1100 1101 template<typename T1, typename T2, typename T3> 1102 bool RequireLiteralType(SourceLocation Loc, QualType T, 1103 unsigned DiagID, const T1 &Arg1, const T2 &Arg2, 1104 const T3 &Arg3) { 1105 BoundTypeDiagnoser3<T1, T2, T3> Diagnoser(DiagID, Arg1, Arg2, 1106 Arg3); 1107 return RequireLiteralType(Loc, T, Diagnoser); 1108 } 1109 1110 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 1111 const CXXScopeSpec &SS, QualType T); 1112 1113 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 1114 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 1115 QualType BuildUnaryTransformType(QualType BaseType, 1116 UnaryTransformType::UTTKind UKind, 1117 SourceLocation Loc); 1118 1119 //===--------------------------------------------------------------------===// 1120 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 1121 // 1122 1123 /// List of decls defined in a function prototype. This contains EnumConstants 1124 /// that incorrectly end up in translation unit scope because there is no 1125 /// function to pin them on. ActOnFunctionDeclarator reads this list and patches 1126 /// them into the FunctionDecl. 1127 std::vector<NamedDecl*> DeclsInPrototypeScope; 1128 /// Nonzero if we are currently parsing a function declarator. This is a counter 1129 /// as opposed to a boolean so we can deal with nested function declarators 1130 /// such as: 1131 /// void f(void (*g)(), ...) 1132 unsigned InFunctionDeclarator; 1133 1134 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 1135 1136 void DiagnoseUseOfUnimplementedSelectors(); 1137 1138 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 1139 Scope *S, CXXScopeSpec *SS = 0, 1140 bool isClassName = false, 1141 bool HasTrailingDot = false, 1142 ParsedType ObjectType = ParsedType(), 1143 bool IsCtorOrDtorName = false, 1144 bool WantNontrivialTypeSourceInfo = false, 1145 IdentifierInfo **CorrectedII = 0); 1146 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 1147 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS, Scope *S); 1148 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 1149 SourceLocation IILoc, 1150 Scope *S, 1151 CXXScopeSpec *SS, 1152 ParsedType &SuggestedType); 1153 1154 /// \brief Describes the result of the name lookup and resolution performed 1155 /// by \c ClassifyName(). 1156 enum NameClassificationKind { 1157 NC_Unknown, 1158 NC_Error, 1159 NC_Keyword, 1160 NC_Type, 1161 NC_Expression, 1162 NC_NestedNameSpecifier, 1163 NC_TypeTemplate, 1164 NC_FunctionTemplate 1165 }; 1166 1167 class NameClassification { 1168 NameClassificationKind Kind; 1169 ExprResult Expr; 1170 TemplateName Template; 1171 ParsedType Type; 1172 const IdentifierInfo *Keyword; 1173 1174 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 1175 1176 public: 1177 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 1178 1179 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 1180 1181 NameClassification(const IdentifierInfo *Keyword) 1182 : Kind(NC_Keyword), Keyword(Keyword) { } 1183 1184 static NameClassification Error() { 1185 return NameClassification(NC_Error); 1186 } 1187 1188 static NameClassification Unknown() { 1189 return NameClassification(NC_Unknown); 1190 } 1191 1192 static NameClassification NestedNameSpecifier() { 1193 return NameClassification(NC_NestedNameSpecifier); 1194 } 1195 1196 static NameClassification TypeTemplate(TemplateName Name) { 1197 NameClassification Result(NC_TypeTemplate); 1198 Result.Template = Name; 1199 return Result; 1200 } 1201 1202 static NameClassification FunctionTemplate(TemplateName Name) { 1203 NameClassification Result(NC_FunctionTemplate); 1204 Result.Template = Name; 1205 return Result; 1206 } 1207 1208 NameClassificationKind getKind() const { return Kind; } 1209 1210 ParsedType getType() const { 1211 assert(Kind == NC_Type); 1212 return Type; 1213 } 1214 1215 ExprResult getExpression() const { 1216 assert(Kind == NC_Expression); 1217 return Expr; 1218 } 1219 1220 TemplateName getTemplateName() const { 1221 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 1222 return Template; 1223 } 1224 1225 TemplateNameKind getTemplateNameKind() const { 1226 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 1227 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 1228 } 1229}; 1230 1231 /// \brief Perform name lookup on the given name, classifying it based on 1232 /// the results of name lookup and the following token. 1233 /// 1234 /// This routine is used by the parser to resolve identifiers and help direct 1235 /// parsing. When the identifier cannot be found, this routine will attempt 1236 /// to correct the typo and classify based on the resulting name. 1237 /// 1238 /// \param S The scope in which we're performing name lookup. 1239 /// 1240 /// \param SS The nested-name-specifier that precedes the name. 1241 /// 1242 /// \param Name The identifier. If typo correction finds an alternative name, 1243 /// this pointer parameter will be updated accordingly. 1244 /// 1245 /// \param NameLoc The location of the identifier. 1246 /// 1247 /// \param NextToken The token following the identifier. Used to help 1248 /// disambiguate the name. 1249 NameClassification ClassifyName(Scope *S, 1250 CXXScopeSpec &SS, 1251 IdentifierInfo *&Name, 1252 SourceLocation NameLoc, 1253 const Token &NextToken); 1254 1255 Decl *ActOnDeclarator(Scope *S, Declarator &D); 1256 1257 Decl *HandleDeclarator(Scope *S, Declarator &D, 1258 MultiTemplateParamsArg TemplateParameterLists); 1259 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 1260 const LookupResult &Previous, 1261 Scope *S); 1262 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 1263 bool diagnoseQualifiedDeclaration(CXXScopeSpec &SS, DeclContext *DC, 1264 DeclarationName Name, 1265 SourceLocation Loc); 1266 void DiagnoseFunctionSpecifiers(Declarator& D); 1267 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 1268 void CheckShadow(Scope *S, VarDecl *D); 1269 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 1270 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 1271 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1272 TypeSourceInfo *TInfo, 1273 LookupResult &Previous); 1274 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 1275 LookupResult &Previous, bool &Redeclaration); 1276 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1277 TypeSourceInfo *TInfo, 1278 LookupResult &Previous, 1279 MultiTemplateParamsArg TemplateParamLists); 1280 // Returns true if the variable declaration is a redeclaration 1281 bool CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous); 1282 void CheckCompleteVariableDeclaration(VarDecl *var); 1283 void ActOnStartFunctionDeclarator(); 1284 void ActOnEndFunctionDeclarator(); 1285 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1286 TypeSourceInfo *TInfo, 1287 LookupResult &Previous, 1288 MultiTemplateParamsArg TemplateParamLists, 1289 bool &AddToScope); 1290 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1291 1292 bool CheckConstexprFunctionDecl(const FunctionDecl *FD); 1293 bool CheckConstexprFunctionBody(const FunctionDecl *FD, Stmt *Body); 1294 1295 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1296 // Returns true if the function declaration is a redeclaration 1297 bool CheckFunctionDeclaration(Scope *S, 1298 FunctionDecl *NewFD, LookupResult &Previous, 1299 bool IsExplicitSpecialization); 1300 void CheckMain(FunctionDecl *FD, const DeclSpec &D); 1301 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1302 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1303 SourceLocation Loc, 1304 QualType T); 1305 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1306 SourceLocation NameLoc, IdentifierInfo *Name, 1307 QualType T, TypeSourceInfo *TSInfo, 1308 StorageClass SC, StorageClass SCAsWritten); 1309 void ActOnParamDefaultArgument(Decl *param, 1310 SourceLocation EqualLoc, 1311 Expr *defarg); 1312 void ActOnParamUnparsedDefaultArgument(Decl *param, 1313 SourceLocation EqualLoc, 1314 SourceLocation ArgLoc); 1315 void ActOnParamDefaultArgumentError(Decl *param); 1316 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1317 SourceLocation EqualLoc); 1318 1319 void CheckSelfReference(Decl *OrigDecl, Expr *E); 1320 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1321 bool TypeMayContainAuto); 1322 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1323 void ActOnInitializerError(Decl *Dcl); 1324 void ActOnCXXForRangeDecl(Decl *D); 1325 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1326 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1327 void FinalizeDeclaration(Decl *D); 1328 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1329 Decl **Group, 1330 unsigned NumDecls); 1331 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1332 bool TypeMayContainAuto = true); 1333 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1334 SourceLocation LocAfterDecls); 1335 void CheckForFunctionRedefinition(FunctionDecl *FD); 1336 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1337 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1338 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1339 1340 void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope); 1341 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1342 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1343 1344 /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an 1345 /// attribute for which parsing is delayed. 1346 void ActOnFinishDelayedAttribute(Scope *S, Decl *D, ParsedAttributes &Attrs); 1347 1348 /// \brief Diagnose any unused parameters in the given sequence of 1349 /// ParmVarDecl pointers. 1350 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1351 ParmVarDecl * const *End); 1352 1353 /// \brief Diagnose whether the size of parameters or return value of a 1354 /// function or obj-c method definition is pass-by-value and larger than a 1355 /// specified threshold. 1356 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1357 ParmVarDecl * const *End, 1358 QualType ReturnTy, 1359 NamedDecl *D); 1360 1361 void DiagnoseInvalidJumps(Stmt *Body); 1362 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1363 SourceLocation AsmLoc, 1364 SourceLocation RParenLoc); 1365 1366 /// \brief The parser has processed a module import declaration. 1367 /// 1368 /// \param AtLoc The location of the '@' symbol, if any. 1369 /// 1370 /// \param ImportLoc The location of the 'import' keyword. 1371 /// 1372 /// \param Path The module access path. 1373 DeclResult ActOnModuleImport(SourceLocation AtLoc, SourceLocation ImportLoc, 1374 ModuleIdPath Path); 1375 1376 /// \brief Retrieve a suitable printing policy. 1377 PrintingPolicy getPrintingPolicy() const { 1378 return getPrintingPolicy(Context, PP); 1379 } 1380 1381 /// \brief Retrieve a suitable printing policy. 1382 static PrintingPolicy getPrintingPolicy(const ASTContext &Ctx, 1383 const Preprocessor &PP); 1384 1385 /// Scope actions. 1386 void ActOnPopScope(SourceLocation Loc, Scope *S); 1387 void ActOnTranslationUnitScope(Scope *S); 1388 1389 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1390 DeclSpec &DS); 1391 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1392 DeclSpec &DS, 1393 MultiTemplateParamsArg TemplateParams); 1394 1395 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1396 AccessSpecifier AS, 1397 RecordDecl *Record); 1398 1399 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1400 RecordDecl *Record); 1401 1402 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1403 TagTypeKind NewTag, bool isDefinition, 1404 SourceLocation NewTagLoc, 1405 const IdentifierInfo &Name); 1406 1407 enum TagUseKind { 1408 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1409 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1410 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1411 TUK_Friend // Friend declaration: 'friend struct foo;' 1412 }; 1413 1414 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1415 SourceLocation KWLoc, CXXScopeSpec &SS, 1416 IdentifierInfo *Name, SourceLocation NameLoc, 1417 AttributeList *Attr, AccessSpecifier AS, 1418 SourceLocation ModulePrivateLoc, 1419 MultiTemplateParamsArg TemplateParameterLists, 1420 bool &OwnedDecl, bool &IsDependent, 1421 SourceLocation ScopedEnumKWLoc, 1422 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1423 1424 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1425 unsigned TagSpec, SourceLocation TagLoc, 1426 CXXScopeSpec &SS, 1427 IdentifierInfo *Name, SourceLocation NameLoc, 1428 AttributeList *Attr, 1429 MultiTemplateParamsArg TempParamLists); 1430 1431 TypeResult ActOnDependentTag(Scope *S, 1432 unsigned TagSpec, 1433 TagUseKind TUK, 1434 const CXXScopeSpec &SS, 1435 IdentifierInfo *Name, 1436 SourceLocation TagLoc, 1437 SourceLocation NameLoc); 1438 1439 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1440 IdentifierInfo *ClassName, 1441 SmallVectorImpl<Decl *> &Decls); 1442 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1443 Declarator &D, Expr *BitfieldWidth); 1444 1445 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1446 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1447 AccessSpecifier AS); 1448 1449 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1450 TypeSourceInfo *TInfo, 1451 RecordDecl *Record, SourceLocation Loc, 1452 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1453 SourceLocation TSSL, 1454 AccessSpecifier AS, NamedDecl *PrevDecl, 1455 Declarator *D = 0); 1456 1457 enum CXXSpecialMember { 1458 CXXDefaultConstructor, 1459 CXXCopyConstructor, 1460 CXXMoveConstructor, 1461 CXXCopyAssignment, 1462 CXXMoveAssignment, 1463 CXXDestructor, 1464 CXXInvalid 1465 }; 1466 bool CheckNontrivialField(FieldDecl *FD); 1467 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1468 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1469 void ActOnLastBitfield(SourceLocation DeclStart, 1470 SmallVectorImpl<Decl *> &AllIvarDecls); 1471 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, 1472 Declarator &D, Expr *BitfieldWidth, 1473 tok::ObjCKeywordKind visibility); 1474 1475 // This is used for both record definitions and ObjC interface declarations. 1476 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1477 llvm::ArrayRef<Decl *> Fields, 1478 SourceLocation LBrac, SourceLocation RBrac, 1479 AttributeList *AttrList); 1480 1481 /// ActOnTagStartDefinition - Invoked when we have entered the 1482 /// scope of a tag's definition (e.g., for an enumeration, class, 1483 /// struct, or union). 1484 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1485 1486 Decl *ActOnObjCContainerStartDefinition(Decl *IDecl); 1487 1488 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1489 /// C++ record definition's base-specifiers clause and are starting its 1490 /// member declarations. 1491 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1492 SourceLocation FinalLoc, 1493 SourceLocation LBraceLoc); 1494 1495 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1496 /// the definition of a tag (enumeration, class, struct, or union). 1497 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1498 SourceLocation RBraceLoc); 1499 1500 void ActOnObjCContainerFinishDefinition(); 1501 1502 /// \brief Invoked when we must temporarily exit the objective-c container 1503 /// scope for parsing/looking-up C constructs. 1504 /// 1505 /// Must be followed by a call to \see ActOnObjCReenterContainerContext 1506 void ActOnObjCTemporaryExitContainerContext(DeclContext *DC); 1507 void ActOnObjCReenterContainerContext(DeclContext *DC); 1508 1509 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1510 /// error parsing the definition of a tag. 1511 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1512 1513 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1514 EnumConstantDecl *LastEnumConst, 1515 SourceLocation IdLoc, 1516 IdentifierInfo *Id, 1517 Expr *val); 1518 bool CheckEnumUnderlyingType(TypeSourceInfo *TI); 1519 bool CheckEnumRedeclaration(SourceLocation EnumLoc, bool IsScoped, 1520 QualType EnumUnderlyingTy, const EnumDecl *Prev); 1521 1522 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1523 SourceLocation IdLoc, IdentifierInfo *Id, 1524 AttributeList *Attrs, 1525 SourceLocation EqualLoc, Expr *Val); 1526 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1527 SourceLocation RBraceLoc, Decl *EnumDecl, 1528 Decl **Elements, unsigned NumElements, 1529 Scope *S, AttributeList *Attr); 1530 1531 DeclContext *getContainingDC(DeclContext *DC); 1532 1533 /// Set the current declaration context until it gets popped. 1534 void PushDeclContext(Scope *S, DeclContext *DC); 1535 void PopDeclContext(); 1536 1537 /// EnterDeclaratorContext - Used when we must lookup names in the context 1538 /// of a declarator's nested name specifier. 1539 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1540 void ExitDeclaratorContext(Scope *S); 1541 1542 /// Push the parameters of D, which must be a function, into scope. 1543 void ActOnReenterFunctionContext(Scope* S, Decl* D); 1544 void ActOnExitFunctionContext(); 1545 1546 DeclContext *getFunctionLevelDeclContext(); 1547 1548 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1549 /// to the function decl for the function being parsed. If we're currently 1550 /// in a 'block', this returns the containing context. 1551 FunctionDecl *getCurFunctionDecl(); 1552 1553 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1554 /// the method decl for the method being parsed. If we're currently 1555 /// in a 'block', this returns the containing context. 1556 ObjCMethodDecl *getCurMethodDecl(); 1557 1558 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1559 /// or C function we're in, otherwise return null. If we're currently 1560 /// in a 'block', this returns the containing context. 1561 NamedDecl *getCurFunctionOrMethodDecl(); 1562 1563 /// Add this decl to the scope shadowed decl chains. 1564 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1565 1566 /// \brief Make the given externally-produced declaration visible at the 1567 /// top level scope. 1568 /// 1569 /// \param D The externally-produced declaration to push. 1570 /// 1571 /// \param Name The name of the externally-produced declaration. 1572 void pushExternalDeclIntoScope(NamedDecl *D, DeclarationName Name); 1573 1574 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1575 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1576 /// true if 'D' belongs to the given declaration context. 1577 /// 1578 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1579 /// whether the declaration is in scope for the purposes of explicit template 1580 /// instantiation or specialization. The default is false. 1581 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1582 bool ExplicitInstantiationOrSpecialization = false); 1583 1584 /// Finds the scope corresponding to the given decl context, if it 1585 /// happens to be an enclosing scope. Otherwise return NULL. 1586 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1587 1588 /// Subroutines of ActOnDeclarator(). 1589 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1590 TypeSourceInfo *TInfo); 1591 bool isIncompatibleTypedef(TypeDecl *Old, TypedefNameDecl *New); 1592 void mergeDeclAttributes(Decl *New, Decl *Old, bool MergeDeprecation = true); 1593 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1594 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old, Scope *S); 1595 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old, 1596 Scope *S); 1597 void mergeObjCMethodDecls(ObjCMethodDecl *New, ObjCMethodDecl *Old); 1598 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1599 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1600 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1601 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old, Scope *S); 1602 1603 // AssignmentAction - This is used by all the assignment diagnostic functions 1604 // to represent what is actually causing the operation 1605 enum AssignmentAction { 1606 AA_Assigning, 1607 AA_Passing, 1608 AA_Returning, 1609 AA_Converting, 1610 AA_Initializing, 1611 AA_Sending, 1612 AA_Casting 1613 }; 1614 1615 /// C++ Overloading. 1616 enum OverloadKind { 1617 /// This is a legitimate overload: the existing declarations are 1618 /// functions or function templates with different signatures. 1619 Ovl_Overload, 1620 1621 /// This is not an overload because the signature exactly matches 1622 /// an existing declaration. 1623 Ovl_Match, 1624 1625 /// This is not an overload because the lookup results contain a 1626 /// non-function. 1627 Ovl_NonFunction 1628 }; 1629 OverloadKind CheckOverload(Scope *S, 1630 FunctionDecl *New, 1631 const LookupResult &OldDecls, 1632 NamedDecl *&OldDecl, 1633 bool IsForUsingDecl); 1634 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1635 1636 /// \brief Checks availability of the function depending on the current 1637 /// function context.Inside an unavailable function,unavailability is ignored. 1638 /// 1639 /// \returns true if \arg FD is unavailable and current context is inside 1640 /// an available function, false otherwise. 1641 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1642 1643 ImplicitConversionSequence 1644 TryImplicitConversion(Expr *From, QualType ToType, 1645 bool SuppressUserConversions, 1646 bool AllowExplicit, 1647 bool InOverloadResolution, 1648 bool CStyle, 1649 bool AllowObjCWritebackConversion); 1650 1651 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1652 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1653 bool IsComplexPromotion(QualType FromType, QualType ToType); 1654 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1655 bool InOverloadResolution, 1656 QualType& ConvertedType, bool &IncompatibleObjC); 1657 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1658 QualType& ConvertedType, bool &IncompatibleObjC); 1659 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1660 QualType &ConvertedType); 1661 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1662 QualType& ConvertedType); 1663 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1664 const FunctionProtoType *NewType, 1665 unsigned *ArgPos = 0); 1666 void HandleFunctionTypeMismatch(PartialDiagnostic &PDiag, 1667 QualType FromType, QualType ToType); 1668 1669 CastKind PrepareCastToObjCObjectPointer(ExprResult &E); 1670 bool CheckPointerConversion(Expr *From, QualType ToType, 1671 CastKind &Kind, 1672 CXXCastPath& BasePath, 1673 bool IgnoreBaseAccess); 1674 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1675 bool InOverloadResolution, 1676 QualType &ConvertedType); 1677 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1678 CastKind &Kind, 1679 CXXCastPath &BasePath, 1680 bool IgnoreBaseAccess); 1681 bool IsQualificationConversion(QualType FromType, QualType ToType, 1682 bool CStyle, bool &ObjCLifetimeConversion); 1683 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1684 QualType &ResultTy); 1685 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1686 1687 1688 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1689 const VarDecl *NRVOCandidate, 1690 QualType ResultType, 1691 Expr *Value, 1692 bool AllowNRVO = true); 1693 1694 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1695 ExprResult Init); 1696 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1697 SourceLocation EqualLoc, 1698 ExprResult Init, 1699 bool TopLevelOfInitList = false, 1700 bool AllowExplicit = false); 1701 ExprResult PerformObjectArgumentInitialization(Expr *From, 1702 NestedNameSpecifier *Qualifier, 1703 NamedDecl *FoundDecl, 1704 CXXMethodDecl *Method); 1705 1706 ExprResult PerformContextuallyConvertToBool(Expr *From); 1707 ExprResult PerformContextuallyConvertToObjCPointer(Expr *From); 1708 1709 /// Contexts in which a converted constant expression is required. 1710 enum CCEKind { 1711 CCEK_CaseValue, ///< Expression in a case label. 1712 CCEK_Enumerator, ///< Enumerator value with fixed underlying type. 1713 CCEK_TemplateArg ///< Value of a non-type template parameter. 1714 }; 1715 ExprResult CheckConvertedConstantExpression(Expr *From, QualType T, 1716 llvm::APSInt &Value, CCEKind CCE); 1717 1718 ExprResult 1719 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1720 const PartialDiagnostic &NotIntDiag, 1721 const PartialDiagnostic &IncompleteDiag, 1722 const PartialDiagnostic &ExplicitConvDiag, 1723 const PartialDiagnostic &ExplicitConvNote, 1724 const PartialDiagnostic &AmbigDiag, 1725 const PartialDiagnostic &AmbigNote, 1726 const PartialDiagnostic &ConvDiag, 1727 bool AllowScopedEnumerations); 1728 enum ObjCSubscriptKind { 1729 OS_Array, 1730 OS_Dictionary, 1731 OS_Error 1732 }; 1733 ObjCSubscriptKind CheckSubscriptingKind(Expr *FromE); 1734 1735 ExprResult PerformObjectMemberConversion(Expr *From, 1736 NestedNameSpecifier *Qualifier, 1737 NamedDecl *FoundDecl, 1738 NamedDecl *Member); 1739 1740 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1741 // TODO: make this is a typesafe union. 1742 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1743 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1744 1745 void AddOverloadCandidate(FunctionDecl *Function, 1746 DeclAccessPair FoundDecl, 1747 llvm::ArrayRef<Expr *> Args, 1748 OverloadCandidateSet& CandidateSet, 1749 bool SuppressUserConversions = false, 1750 bool PartialOverloading = false, 1751 bool AllowExplicit = false); 1752 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1753 llvm::ArrayRef<Expr *> Args, 1754 OverloadCandidateSet& CandidateSet, 1755 bool SuppressUserConversions = false, 1756 TemplateArgumentListInfo *ExplicitTemplateArgs = 0); 1757 void AddMethodCandidate(DeclAccessPair FoundDecl, 1758 QualType ObjectType, 1759 Expr::Classification ObjectClassification, 1760 Expr **Args, unsigned NumArgs, 1761 OverloadCandidateSet& CandidateSet, 1762 bool SuppressUserConversion = false); 1763 void AddMethodCandidate(CXXMethodDecl *Method, 1764 DeclAccessPair FoundDecl, 1765 CXXRecordDecl *ActingContext, QualType ObjectType, 1766 Expr::Classification ObjectClassification, 1767 llvm::ArrayRef<Expr *> Args, 1768 OverloadCandidateSet& CandidateSet, 1769 bool SuppressUserConversions = false); 1770 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1771 DeclAccessPair FoundDecl, 1772 CXXRecordDecl *ActingContext, 1773 TemplateArgumentListInfo *ExplicitTemplateArgs, 1774 QualType ObjectType, 1775 Expr::Classification ObjectClassification, 1776 llvm::ArrayRef<Expr *> Args, 1777 OverloadCandidateSet& CandidateSet, 1778 bool SuppressUserConversions = false); 1779 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1780 DeclAccessPair FoundDecl, 1781 TemplateArgumentListInfo *ExplicitTemplateArgs, 1782 llvm::ArrayRef<Expr *> Args, 1783 OverloadCandidateSet& CandidateSet, 1784 bool SuppressUserConversions = false); 1785 void AddConversionCandidate(CXXConversionDecl *Conversion, 1786 DeclAccessPair FoundDecl, 1787 CXXRecordDecl *ActingContext, 1788 Expr *From, QualType ToType, 1789 OverloadCandidateSet& CandidateSet); 1790 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1791 DeclAccessPair FoundDecl, 1792 CXXRecordDecl *ActingContext, 1793 Expr *From, QualType ToType, 1794 OverloadCandidateSet &CandidateSet); 1795 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1796 DeclAccessPair FoundDecl, 1797 CXXRecordDecl *ActingContext, 1798 const FunctionProtoType *Proto, 1799 Expr *Object, llvm::ArrayRef<Expr*> Args, 1800 OverloadCandidateSet& CandidateSet); 1801 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1802 SourceLocation OpLoc, 1803 Expr **Args, unsigned NumArgs, 1804 OverloadCandidateSet& CandidateSet, 1805 SourceRange OpRange = SourceRange()); 1806 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1807 Expr **Args, unsigned NumArgs, 1808 OverloadCandidateSet& CandidateSet, 1809 bool IsAssignmentOperator = false, 1810 unsigned NumContextualBoolArguments = 0); 1811 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1812 SourceLocation OpLoc, 1813 Expr **Args, unsigned NumArgs, 1814 OverloadCandidateSet& CandidateSet); 1815 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1816 bool Operator, SourceLocation Loc, 1817 llvm::ArrayRef<Expr *> Args, 1818 TemplateArgumentListInfo *ExplicitTemplateArgs, 1819 OverloadCandidateSet& CandidateSet, 1820 bool PartialOverloading = false, 1821 bool StdNamespaceIsAssociated = false); 1822 1823 // Emit as a 'note' the specific overload candidate 1824 void NoteOverloadCandidate(FunctionDecl *Fn, QualType DestType = QualType()); 1825 1826 // Emit as a series of 'note's all template and non-templates 1827 // identified by the expression Expr 1828 void NoteAllOverloadCandidates(Expr* E, QualType DestType = QualType()); 1829 1830 // [PossiblyAFunctionType] --> [Return] 1831 // NonFunctionType --> NonFunctionType 1832 // R (A) --> R(A) 1833 // R (*)(A) --> R (A) 1834 // R (&)(A) --> R (A) 1835 // R (S::*)(A) --> R (A) 1836 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1837 1838 FunctionDecl * 1839 ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, 1840 QualType TargetType, 1841 bool Complain, 1842 DeclAccessPair &Found, 1843 bool *pHadMultipleCandidates = 0); 1844 1845 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1846 bool Complain = false, 1847 DeclAccessPair* Found = 0); 1848 1849 bool ResolveAndFixSingleFunctionTemplateSpecialization( 1850 ExprResult &SrcExpr, 1851 bool DoFunctionPointerConverion = false, 1852 bool Complain = false, 1853 const SourceRange& OpRangeForComplaining = SourceRange(), 1854 QualType DestTypeForComplaining = QualType(), 1855 unsigned DiagIDForComplaining = 0); 1856 1857 1858 Expr *FixOverloadedFunctionReference(Expr *E, 1859 DeclAccessPair FoundDecl, 1860 FunctionDecl *Fn); 1861 ExprResult FixOverloadedFunctionReference(ExprResult, 1862 DeclAccessPair FoundDecl, 1863 FunctionDecl *Fn); 1864 1865 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1866 llvm::ArrayRef<Expr *> Args, 1867 OverloadCandidateSet &CandidateSet, 1868 bool PartialOverloading = false); 1869 1870 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1871 UnresolvedLookupExpr *ULE, 1872 SourceLocation LParenLoc, 1873 Expr **Args, unsigned NumArgs, 1874 SourceLocation RParenLoc, 1875 Expr *ExecConfig, 1876 bool AllowTypoCorrection=true); 1877 1878 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1879 unsigned Opc, 1880 const UnresolvedSetImpl &Fns, 1881 Expr *input); 1882 1883 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1884 unsigned Opc, 1885 const UnresolvedSetImpl &Fns, 1886 Expr *LHS, Expr *RHS); 1887 1888 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1889 SourceLocation RLoc, 1890 Expr *Base,Expr *Idx); 1891 1892 ExprResult 1893 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1894 SourceLocation LParenLoc, Expr **Args, 1895 unsigned NumArgs, SourceLocation RParenLoc); 1896 ExprResult 1897 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1898 Expr **Args, unsigned NumArgs, 1899 SourceLocation RParenLoc); 1900 1901 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1902 SourceLocation OpLoc); 1903 1904 /// CheckCallReturnType - Checks that a call expression's return type is 1905 /// complete. Returns true on failure. The location passed in is the location 1906 /// that best represents the call. 1907 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1908 CallExpr *CE, FunctionDecl *FD); 1909 1910 /// Helpers for dealing with blocks and functions. 1911 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1912 bool CheckParameterNames); 1913 void CheckCXXDefaultArguments(FunctionDecl *FD); 1914 void CheckExtraCXXDefaultArguments(Declarator &D); 1915 Scope *getNonFieldDeclScope(Scope *S); 1916 1917 /// \name Name lookup 1918 /// 1919 /// These routines provide name lookup that is used during semantic 1920 /// analysis to resolve the various kinds of names (identifiers, 1921 /// overloaded operator names, constructor names, etc.) into zero or 1922 /// more declarations within a particular scope. The major entry 1923 /// points are LookupName, which performs unqualified name lookup, 1924 /// and LookupQualifiedName, which performs qualified name lookup. 1925 /// 1926 /// All name lookup is performed based on some specific criteria, 1927 /// which specify what names will be visible to name lookup and how 1928 /// far name lookup should work. These criteria are important both 1929 /// for capturing language semantics (certain lookups will ignore 1930 /// certain names, for example) and for performance, since name 1931 /// lookup is often a bottleneck in the compilation of C++. Name 1932 /// lookup criteria is specified via the LookupCriteria enumeration. 1933 /// 1934 /// The results of name lookup can vary based on the kind of name 1935 /// lookup performed, the current language, and the translation 1936 /// unit. In C, for example, name lookup will either return nothing 1937 /// (no entity found) or a single declaration. In C++, name lookup 1938 /// can additionally refer to a set of overloaded functions or 1939 /// result in an ambiguity. All of the possible results of name 1940 /// lookup are captured by the LookupResult class, which provides 1941 /// the ability to distinguish among them. 1942 //@{ 1943 1944 /// @brief Describes the kind of name lookup to perform. 1945 enum LookupNameKind { 1946 /// Ordinary name lookup, which finds ordinary names (functions, 1947 /// variables, typedefs, etc.) in C and most kinds of names 1948 /// (functions, variables, members, types, etc.) in C++. 1949 LookupOrdinaryName = 0, 1950 /// Tag name lookup, which finds the names of enums, classes, 1951 /// structs, and unions. 1952 LookupTagName, 1953 /// Label name lookup. 1954 LookupLabel, 1955 /// Member name lookup, which finds the names of 1956 /// class/struct/union members. 1957 LookupMemberName, 1958 /// Look up of an operator name (e.g., operator+) for use with 1959 /// operator overloading. This lookup is similar to ordinary name 1960 /// lookup, but will ignore any declarations that are class members. 1961 LookupOperatorName, 1962 /// Look up of a name that precedes the '::' scope resolution 1963 /// operator in C++. This lookup completely ignores operator, object, 1964 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1965 LookupNestedNameSpecifierName, 1966 /// Look up a namespace name within a C++ using directive or 1967 /// namespace alias definition, ignoring non-namespace names (C++ 1968 /// [basic.lookup.udir]p1). 1969 LookupNamespaceName, 1970 /// Look up all declarations in a scope with the given name, 1971 /// including resolved using declarations. This is appropriate 1972 /// for checking redeclarations for a using declaration. 1973 LookupUsingDeclName, 1974 /// Look up an ordinary name that is going to be redeclared as a 1975 /// name with linkage. This lookup ignores any declarations that 1976 /// are outside of the current scope unless they have linkage. See 1977 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1978 LookupRedeclarationWithLinkage, 1979 /// Look up the name of an Objective-C protocol. 1980 LookupObjCProtocolName, 1981 /// Look up implicit 'self' parameter of an objective-c method. 1982 LookupObjCImplicitSelfParam, 1983 /// \brief Look up any declaration with any name. 1984 LookupAnyName 1985 }; 1986 1987 /// \brief Specifies whether (or how) name lookup is being performed for a 1988 /// redeclaration (vs. a reference). 1989 enum RedeclarationKind { 1990 /// \brief The lookup is a reference to this name that is not for the 1991 /// purpose of redeclaring the name. 1992 NotForRedeclaration = 0, 1993 /// \brief The lookup results will be used for redeclaration of a name, 1994 /// if an entity by that name already exists. 1995 ForRedeclaration 1996 }; 1997 1998 /// \brief The possible outcomes of name lookup for a literal operator. 1999 enum LiteralOperatorLookupResult { 2000 /// \brief The lookup resulted in an error. 2001 LOLR_Error, 2002 /// \brief The lookup found a single 'cooked' literal operator, which 2003 /// expects a normal literal to be built and passed to it. 2004 LOLR_Cooked, 2005 /// \brief The lookup found a single 'raw' literal operator, which expects 2006 /// a string literal containing the spelling of the literal token. 2007 LOLR_Raw, 2008 /// \brief The lookup found an overload set of literal operator templates, 2009 /// which expect the characters of the spelling of the literal token to be 2010 /// passed as a non-type template argument pack. 2011 LOLR_Template 2012 }; 2013 2014 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 2015 CXXSpecialMember SM, 2016 bool ConstArg, 2017 bool VolatileArg, 2018 bool RValueThis, 2019 bool ConstThis, 2020 bool VolatileThis); 2021 2022private: 2023 bool CppLookupName(LookupResult &R, Scope *S); 2024 2025 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 2026 // 2027 // The boolean value will be true to indicate that the namespace was loaded 2028 // from an AST/PCH file, or false otherwise. 2029 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 2030 2031 /// \brief Whether we have already loaded known namespaces from an extenal 2032 /// source. 2033 bool LoadedExternalKnownNamespaces; 2034 2035public: 2036 /// \brief Look up a name, looking for a single declaration. Return 2037 /// null if the results were absent, ambiguous, or overloaded. 2038 /// 2039 /// It is preferable to use the elaborated form and explicitly handle 2040 /// ambiguity and overloaded. 2041 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 2042 SourceLocation Loc, 2043 LookupNameKind NameKind, 2044 RedeclarationKind Redecl 2045 = NotForRedeclaration); 2046 bool LookupName(LookupResult &R, Scope *S, 2047 bool AllowBuiltinCreation = false); 2048 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 2049 bool InUnqualifiedLookup = false); 2050 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 2051 bool AllowBuiltinCreation = false, 2052 bool EnteringContext = false); 2053 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc, 2054 RedeclarationKind Redecl 2055 = NotForRedeclaration); 2056 2057 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 2058 QualType T1, QualType T2, 2059 UnresolvedSetImpl &Functions); 2060 2061 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 2062 SourceLocation GnuLabelLoc = SourceLocation()); 2063 2064 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 2065 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 2066 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 2067 unsigned Quals); 2068 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 2069 bool RValueThis, unsigned ThisQuals); 2070 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class); 2071 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, bool RValueThis, 2072 unsigned ThisQuals); 2073 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 2074 2075 LiteralOperatorLookupResult LookupLiteralOperator(Scope *S, LookupResult &R, 2076 ArrayRef<QualType> ArgTys, 2077 bool AllowRawAndTemplate); 2078 2079 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 2080 SourceLocation Loc, 2081 llvm::ArrayRef<Expr *> Args, 2082 ADLResult &Functions, 2083 bool StdNamespaceIsAssociated = false); 2084 2085 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 2086 VisibleDeclConsumer &Consumer, 2087 bool IncludeGlobalScope = true); 2088 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 2089 VisibleDeclConsumer &Consumer, 2090 bool IncludeGlobalScope = true); 2091 2092 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 2093 Sema::LookupNameKind LookupKind, 2094 Scope *S, CXXScopeSpec *SS, 2095 CorrectionCandidateCallback &CCC, 2096 DeclContext *MemberContext = 0, 2097 bool EnteringContext = false, 2098 const ObjCObjectPointerType *OPT = 0); 2099 2100 void FindAssociatedClassesAndNamespaces(llvm::ArrayRef<Expr *> Args, 2101 AssociatedNamespaceSet &AssociatedNamespaces, 2102 AssociatedClassSet &AssociatedClasses); 2103 2104 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 2105 bool ConsiderLinkage, 2106 bool ExplicitInstantiationOrSpecialization); 2107 2108 bool DiagnoseAmbiguousLookup(LookupResult &Result); 2109 //@} 2110 2111 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 2112 SourceLocation IdLoc, 2113 bool TypoCorrection = false); 2114 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 2115 Scope *S, bool ForRedeclaration, 2116 SourceLocation Loc); 2117 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 2118 Scope *S); 2119 void AddKnownFunctionAttributes(FunctionDecl *FD); 2120 2121 // More parsing and symbol table subroutines. 2122 2123 // Decl attributes - this routine is the top level dispatcher. 2124 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 2125 bool NonInheritable = true, bool Inheritable = true); 2126 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 2127 bool NonInheritable = true, bool Inheritable = true); 2128 bool ProcessAccessDeclAttributeList(AccessSpecDecl *ASDecl, 2129 const AttributeList *AttrList); 2130 2131 void checkUnusedDeclAttributes(Declarator &D); 2132 2133 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 2134 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 2135 bool CheckNoReturnAttr(const AttributeList &attr); 2136 2137 /// \brief Stmt attributes - this routine is the top level dispatcher. 2138 StmtResult ProcessStmtAttributes(Stmt *Stmt, AttributeList *Attrs, 2139 SourceRange Range); 2140 2141 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 2142 bool &IncompleteImpl, unsigned DiagID); 2143 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 2144 ObjCMethodDecl *MethodDecl, 2145 bool IsProtocolMethodDecl); 2146 2147 void CheckConflictingOverridingMethod(ObjCMethodDecl *Method, 2148 ObjCMethodDecl *Overridden, 2149 bool IsProtocolMethodDecl); 2150 2151 /// WarnExactTypedMethods - This routine issues a warning if method 2152 /// implementation declaration matches exactly that of its declaration. 2153 void WarnExactTypedMethods(ObjCMethodDecl *Method, 2154 ObjCMethodDecl *MethodDecl, 2155 bool IsProtocolMethodDecl); 2156 2157 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 2158 ObjCInterfaceDecl *IDecl); 2159 2160 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 2161 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap; 2162 2163 /// CheckProtocolMethodDefs - This routine checks unimplemented 2164 /// methods declared in protocol, and those referenced by it. 2165 /// \param IDecl - Used for checking for methods which may have been 2166 /// inherited. 2167 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 2168 ObjCProtocolDecl *PDecl, 2169 bool& IncompleteImpl, 2170 const SelectorSet &InsMap, 2171 const SelectorSet &ClsMap, 2172 ObjCContainerDecl *CDecl); 2173 2174 /// CheckImplementationIvars - This routine checks if the instance variables 2175 /// listed in the implelementation match those listed in the interface. 2176 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 2177 ObjCIvarDecl **Fields, unsigned nIvars, 2178 SourceLocation Loc); 2179 2180 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 2181 /// remains unimplemented in the class or category @implementation. 2182 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 2183 ObjCContainerDecl* IDecl, 2184 bool IncompleteImpl = false); 2185 2186 /// DiagnoseUnimplementedProperties - This routine warns on those properties 2187 /// which must be implemented by this implementation. 2188 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 2189 ObjCContainerDecl *CDecl, 2190 const SelectorSet &InsMap); 2191 2192 /// DefaultSynthesizeProperties - This routine default synthesizes all 2193 /// properties which must be synthesized in class's @implementation. 2194 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 2195 ObjCInterfaceDecl *IDecl); 2196 void DefaultSynthesizeProperties(Scope *S, Decl *D); 2197 2198 /// CollectImmediateProperties - This routine collects all properties in 2199 /// the class and its conforming protocols; but not those it its super class. 2200 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 2201 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 2202 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 2203 2204 2205 /// LookupPropertyDecl - Looks up a property in the current class and all 2206 /// its protocols. 2207 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 2208 IdentifierInfo *II); 2209 2210 /// Called by ActOnProperty to handle @property declarations in 2211 //// class extensions. 2212 Decl *HandlePropertyInClassExtension(Scope *S, 2213 SourceLocation AtLoc, 2214 SourceLocation LParenLoc, 2215 FieldDeclarator &FD, 2216 Selector GetterSel, 2217 Selector SetterSel, 2218 const bool isAssign, 2219 const bool isReadWrite, 2220 const unsigned Attributes, 2221 const unsigned AttributesAsWritten, 2222 bool *isOverridingProperty, 2223 TypeSourceInfo *T, 2224 tok::ObjCKeywordKind MethodImplKind); 2225 2226 /// Called by ActOnProperty and HandlePropertyInClassExtension to 2227 /// handle creating the ObjcPropertyDecl for a category or @interface. 2228 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 2229 ObjCContainerDecl *CDecl, 2230 SourceLocation AtLoc, 2231 SourceLocation LParenLoc, 2232 FieldDeclarator &FD, 2233 Selector GetterSel, 2234 Selector SetterSel, 2235 const bool isAssign, 2236 const bool isReadWrite, 2237 const unsigned Attributes, 2238 const unsigned AttributesAsWritten, 2239 TypeSourceInfo *T, 2240 tok::ObjCKeywordKind MethodImplKind, 2241 DeclContext *lexicalDC = 0); 2242 2243 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 2244 /// warning) when atomic property has one but not the other user-declared 2245 /// setter or getter. 2246 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 2247 ObjCContainerDecl* IDecl); 2248 2249 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 2250 2251 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 2252 2253 enum MethodMatchStrategy { 2254 MMS_loose, 2255 MMS_strict 2256 }; 2257 2258 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 2259 /// true, or false, accordingly. 2260 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 2261 const ObjCMethodDecl *PrevMethod, 2262 MethodMatchStrategy strategy = MMS_strict); 2263 2264 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 2265 /// or protocol against those declared in their implementations. 2266 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 2267 const SelectorSet &ClsMap, 2268 SelectorSet &InsMapSeen, 2269 SelectorSet &ClsMapSeen, 2270 ObjCImplDecl* IMPDecl, 2271 ObjCContainerDecl* IDecl, 2272 bool &IncompleteImpl, 2273 bool ImmediateClass, 2274 bool WarnCategoryMethodImpl=false); 2275 2276 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in 2277 /// category matches with those implemented in its primary class and 2278 /// warns each time an exact match is found. 2279 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP); 2280 2281 /// \brief Add the given method to the list of globally-known methods. 2282 void addMethodToGlobalList(ObjCMethodList *List, ObjCMethodDecl *Method); 2283 2284private: 2285 /// AddMethodToGlobalPool - Add an instance or factory method to the global 2286 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 2287 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 2288 2289 /// LookupMethodInGlobalPool - Returns the instance or factory method and 2290 /// optionally warns if there are multiple signatures. 2291 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 2292 bool receiverIdOrClass, 2293 bool warn, bool instance); 2294 2295public: 2296 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 2297 /// unit are added to a global pool. This allows us to efficiently associate 2298 /// a selector with a method declaraation for purposes of typechecking 2299 /// messages sent to "id" (where the class of the object is unknown). 2300 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2301 AddMethodToGlobalPool(Method, impl, /*instance*/true); 2302 } 2303 2304 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 2305 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2306 AddMethodToGlobalPool(Method, impl, /*instance*/false); 2307 } 2308 2309 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global 2310 /// pool. 2311 void AddAnyMethodToGlobalPool(Decl *D); 2312 2313 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 2314 /// there are multiple signatures. 2315 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 2316 bool receiverIdOrClass=false, 2317 bool warn=true) { 2318 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2319 warn, /*instance*/true); 2320 } 2321 2322 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 2323 /// there are multiple signatures. 2324 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 2325 bool receiverIdOrClass=false, 2326 bool warn=true) { 2327 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2328 warn, /*instance*/false); 2329 } 2330 2331 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 2332 /// implementation. 2333 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 2334 2335 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 2336 /// initialization. 2337 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 2338 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 2339 2340 //===--------------------------------------------------------------------===// 2341 // Statement Parsing Callbacks: SemaStmt.cpp. 2342public: 2343 class FullExprArg { 2344 public: 2345 FullExprArg(Sema &actions) : E(0) { } 2346 2347 // FIXME: The const_cast here is ugly. RValue references would make this 2348 // much nicer (or we could duplicate a bunch of the move semantics 2349 // emulation code from Ownership.h). 2350 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 2351 2352 ExprResult release() { 2353 return move(E); 2354 } 2355 2356 Expr *get() const { return E; } 2357 2358 Expr *operator->() { 2359 return E; 2360 } 2361 2362 private: 2363 // FIXME: No need to make the entire Sema class a friend when it's just 2364 // Sema::MakeFullExpr that needs access to the constructor below. 2365 friend class Sema; 2366 2367 explicit FullExprArg(Expr *expr) : E(expr) {} 2368 2369 Expr *E; 2370 }; 2371 2372 FullExprArg MakeFullExpr(Expr *Arg) { 2373 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 2374 } 2375 2376 StmtResult ActOnExprStmt(FullExprArg Expr); 2377 2378 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 2379 bool HasLeadingEmptyMacro = false); 2380 2381 void ActOnStartOfCompoundStmt(); 2382 void ActOnFinishOfCompoundStmt(); 2383 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 2384 MultiStmtArg Elts, 2385 bool isStmtExpr); 2386 2387 /// \brief A RAII object to enter scope of a compound statement. 2388 class CompoundScopeRAII { 2389 public: 2390 CompoundScopeRAII(Sema &S): S(S) { 2391 S.ActOnStartOfCompoundStmt(); 2392 } 2393 2394 ~CompoundScopeRAII() { 2395 S.ActOnFinishOfCompoundStmt(); 2396 } 2397 2398 private: 2399 Sema &S; 2400 }; 2401 2402 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2403 SourceLocation StartLoc, 2404 SourceLocation EndLoc); 2405 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2406 StmtResult ActOnForEachLValueExpr(Expr *E); 2407 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2408 SourceLocation DotDotDotLoc, Expr *RHSVal, 2409 SourceLocation ColonLoc); 2410 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2411 2412 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2413 SourceLocation ColonLoc, 2414 Stmt *SubStmt, Scope *CurScope); 2415 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2416 SourceLocation ColonLoc, Stmt *SubStmt); 2417 2418 StmtResult ActOnAttributedStmt(SourceLocation AttrLoc, const AttrVec &Attrs, 2419 Stmt *SubStmt); 2420 2421 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2422 FullExprArg CondVal, Decl *CondVar, 2423 Stmt *ThenVal, 2424 SourceLocation ElseLoc, Stmt *ElseVal); 2425 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2426 Expr *Cond, 2427 Decl *CondVar); 2428 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2429 Stmt *Switch, Stmt *Body); 2430 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2431 FullExprArg Cond, 2432 Decl *CondVar, Stmt *Body); 2433 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2434 SourceLocation WhileLoc, 2435 SourceLocation CondLParen, Expr *Cond, 2436 SourceLocation CondRParen); 2437 2438 StmtResult ActOnForStmt(SourceLocation ForLoc, 2439 SourceLocation LParenLoc, 2440 Stmt *First, FullExprArg Second, 2441 Decl *SecondVar, 2442 FullExprArg Third, 2443 SourceLocation RParenLoc, 2444 Stmt *Body); 2445 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc, 2446 Expr *collection); 2447 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2448 SourceLocation LParenLoc, 2449 Stmt *First, Expr *Second, 2450 SourceLocation RParenLoc, Stmt *Body); 2451 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2452 SourceLocation LParenLoc, Stmt *LoopVar, 2453 SourceLocation ColonLoc, Expr *Collection, 2454 SourceLocation RParenLoc); 2455 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2456 SourceLocation ColonLoc, 2457 Stmt *RangeDecl, Stmt *BeginEndDecl, 2458 Expr *Cond, Expr *Inc, 2459 Stmt *LoopVarDecl, 2460 SourceLocation RParenLoc); 2461 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2462 2463 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2464 SourceLocation LabelLoc, 2465 LabelDecl *TheDecl); 2466 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2467 SourceLocation StarLoc, 2468 Expr *DestExp); 2469 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2470 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2471 2472 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2473 bool AllowFunctionParameters); 2474 2475 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2476 StmtResult ActOnCapScopeReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2477 2478 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2479 bool IsSimple, bool IsVolatile, 2480 unsigned NumOutputs, unsigned NumInputs, 2481 IdentifierInfo **Names, 2482 MultiExprArg Constraints, 2483 MultiExprArg Exprs, 2484 Expr *AsmString, 2485 MultiExprArg Clobbers, 2486 SourceLocation RParenLoc, 2487 bool MSAsm = false); 2488 2489 2490 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2491 SourceLocation StartLoc, 2492 SourceLocation IdLoc, IdentifierInfo *Id, 2493 bool Invalid = false); 2494 2495 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2496 2497 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2498 Decl *Parm, Stmt *Body); 2499 2500 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2501 2502 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2503 MultiStmtArg Catch, Stmt *Finally); 2504 2505 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2506 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2507 Scope *CurScope); 2508 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, 2509 Expr *operand); 2510 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2511 Expr *SynchExpr, 2512 Stmt *SynchBody); 2513 2514 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2515 2516 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2517 SourceLocation StartLoc, 2518 SourceLocation IdLoc, 2519 IdentifierInfo *Id); 2520 2521 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2522 2523 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2524 Decl *ExDecl, Stmt *HandlerBlock); 2525 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2526 MultiStmtArg Handlers); 2527 2528 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2529 SourceLocation TryLoc, 2530 Stmt *TryBlock, 2531 Stmt *Handler); 2532 2533 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2534 Expr *FilterExpr, 2535 Stmt *Block); 2536 2537 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2538 Stmt *Block); 2539 2540 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2541 2542 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2543 2544 /// \brief If it's a file scoped decl that must warn if not used, keep track 2545 /// of it. 2546 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2547 2548 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2549 /// whose result is unused, warn. 2550 void DiagnoseUnusedExprResult(const Stmt *S); 2551 void DiagnoseUnusedDecl(const NamedDecl *ND); 2552 2553 /// Emit \p DiagID if statement located on \p StmtLoc has a suspicious null 2554 /// statement as a \p Body, and it is located on the same line. 2555 /// 2556 /// This helps prevent bugs due to typos, such as: 2557 /// if (condition); 2558 /// do_stuff(); 2559 void DiagnoseEmptyStmtBody(SourceLocation StmtLoc, 2560 const Stmt *Body, 2561 unsigned DiagID); 2562 2563 /// Warn if a for/while loop statement \p S, which is followed by 2564 /// \p PossibleBody, has a suspicious null statement as a body. 2565 void DiagnoseEmptyLoopBody(const Stmt *S, 2566 const Stmt *PossibleBody); 2567 2568 ParsingDeclState PushParsingDeclaration() { 2569 return DelayedDiagnostics.pushParsingDecl(); 2570 } 2571 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2572 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2573 } 2574 2575 typedef ProcessingContextState ParsingClassState; 2576 ParsingClassState PushParsingClass() { 2577 return DelayedDiagnostics.pushContext(); 2578 } 2579 void PopParsingClass(ParsingClassState state) { 2580 DelayedDiagnostics.popContext(state); 2581 } 2582 2583 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2584 SourceLocation Loc, 2585 const ObjCInterfaceDecl *UnknownObjCClass=0); 2586 2587 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2588 2589 bool makeUnavailableInSystemHeader(SourceLocation loc, 2590 StringRef message); 2591 2592 //===--------------------------------------------------------------------===// 2593 // Expression Parsing Callbacks: SemaExpr.cpp. 2594 2595 bool CanUseDecl(NamedDecl *D); 2596 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2597 const ObjCInterfaceDecl *UnknownObjCClass=0); 2598 void NoteDeletedFunction(FunctionDecl *FD); 2599 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2600 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2601 ObjCMethodDecl *Getter, 2602 SourceLocation Loc); 2603 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2604 Expr **Args, unsigned NumArgs); 2605 2606 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext, 2607 Decl *LambdaContextDecl = 0, 2608 bool IsDecltype = false); 2609 2610 void PopExpressionEvaluationContext(); 2611 2612 void DiscardCleanupsInEvaluationContext(); 2613 2614 ExprResult TranformToPotentiallyEvaluated(Expr *E); 2615 ExprResult HandleExprEvaluationContextForTypeof(Expr *E); 2616 2617 ExprResult ActOnConstantExpression(ExprResult Res); 2618 2619 // Functions for marking a declaration referenced. These functions also 2620 // contain the relevant logic for marking if a reference to a function or 2621 // variable is an odr-use (in the C++11 sense). There are separate variants 2622 // for expressions referring to a decl; these exist because odr-use marking 2623 // needs to be delayed for some constant variables when we build one of the 2624 // named expressions. 2625 void MarkAnyDeclReferenced(SourceLocation Loc, Decl *D); 2626 void MarkFunctionReferenced(SourceLocation Loc, FunctionDecl *Func); 2627 void MarkVariableReferenced(SourceLocation Loc, VarDecl *Var); 2628 void MarkDeclRefReferenced(DeclRefExpr *E); 2629 void MarkMemberReferenced(MemberExpr *E); 2630 2631 void UpdateMarkingForLValueToRValue(Expr *E); 2632 void CleanupVarDeclMarking(); 2633 2634 enum TryCaptureKind { 2635 TryCapture_Implicit, TryCapture_ExplicitByVal, TryCapture_ExplicitByRef 2636 }; 2637 2638 /// \brief Try to capture the given variable. 2639 /// 2640 /// \param Var The variable to capture. 2641 /// 2642 /// \param Loc The location at which the capture occurs. 2643 /// 2644 /// \param Kind The kind of capture, which may be implicit (for either a 2645 /// block or a lambda), or explicit by-value or by-reference (for a lambda). 2646 /// 2647 /// \param EllipsisLoc The location of the ellipsis, if one is provided in 2648 /// an explicit lambda capture. 2649 /// 2650 /// \param BuildAndDiagnose Whether we are actually supposed to add the 2651 /// captures or diagnose errors. If false, this routine merely check whether 2652 /// the capture can occur without performing the capture itself or complaining 2653 /// if the variable cannot be captured. 2654 /// 2655 /// \param CaptureType Will be set to the type of the field used to capture 2656 /// this variable in the innermost block or lambda. Only valid when the 2657 /// variable can be captured. 2658 /// 2659 /// \param DeclRefType Will be set to the type of a refernce to the capture 2660 /// from within the current scope. Only valid when the variable can be 2661 /// captured. 2662 /// 2663 /// \returns true if an error occurred (i.e., the variable cannot be 2664 /// captured) and false if the capture succeeded. 2665 bool tryCaptureVariable(VarDecl *Var, SourceLocation Loc, TryCaptureKind Kind, 2666 SourceLocation EllipsisLoc, bool BuildAndDiagnose, 2667 QualType &CaptureType, 2668 QualType &DeclRefType); 2669 2670 /// \brief Try to capture the given variable. 2671 bool tryCaptureVariable(VarDecl *Var, SourceLocation Loc, 2672 TryCaptureKind Kind = TryCapture_Implicit, 2673 SourceLocation EllipsisLoc = SourceLocation()); 2674 2675 /// \brief Given a variable, determine the type that a reference to that 2676 /// variable will have in the given scope. 2677 QualType getCapturedDeclRefType(VarDecl *Var, SourceLocation Loc); 2678 2679 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2680 void MarkDeclarationsReferencedInExpr(Expr *E, 2681 bool SkipLocalVariables = false); 2682 2683 /// \brief Try to recover by turning the given expression into a 2684 /// call. Returns true if recovery was attempted or an error was 2685 /// emitted; this may also leave the ExprResult invalid. 2686 bool tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD, 2687 bool ForceComplain = false, 2688 bool (*IsPlausibleResult)(QualType) = 0); 2689 2690 /// \brief Figure out if an expression could be turned into a call. 2691 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2692 UnresolvedSetImpl &NonTemplateOverloads); 2693 2694 /// \brief Conditionally issue a diagnostic based on the current 2695 /// evaluation context. 2696 /// 2697 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2698 /// the function body is parsed, and then do a basic reachability analysis to 2699 /// determine if the statement is reachable. If it is unreachable, the 2700 /// diagnostic will not be emitted. 2701 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement, 2702 const PartialDiagnostic &PD); 2703 2704 // Primary Expressions. 2705 SourceRange getExprRange(Expr *E) const; 2706 2707 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, 2708 SourceLocation TemplateKWLoc, 2709 UnqualifiedId &Id, 2710 bool HasTrailingLParen, bool IsAddressOfOperand, 2711 CorrectionCandidateCallback *CCC = 0); 2712 2713 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2714 TemplateArgumentListInfo &Buffer, 2715 DeclarationNameInfo &NameInfo, 2716 const TemplateArgumentListInfo *&TemplateArgs); 2717 2718 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2719 CorrectionCandidateCallback &CCC, 2720 TemplateArgumentListInfo *ExplicitTemplateArgs = 0, 2721 llvm::ArrayRef<Expr *> Args = llvm::ArrayRef<Expr *>()); 2722 2723 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S, 2724 IdentifierInfo *II, 2725 bool AllowBuiltinCreation=false); 2726 2727 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2728 SourceLocation TemplateKWLoc, 2729 const DeclarationNameInfo &NameInfo, 2730 bool isAddressOfOperand, 2731 const TemplateArgumentListInfo *TemplateArgs); 2732 2733 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2734 ExprValueKind VK, 2735 SourceLocation Loc, 2736 const CXXScopeSpec *SS = 0); 2737 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2738 ExprValueKind VK, 2739 const DeclarationNameInfo &NameInfo, 2740 const CXXScopeSpec *SS = 0); 2741 ExprResult 2742 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2743 SourceLocation nameLoc, 2744 IndirectFieldDecl *indirectField, 2745 Expr *baseObjectExpr = 0, 2746 SourceLocation opLoc = SourceLocation()); 2747 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2748 SourceLocation TemplateKWLoc, 2749 LookupResult &R, 2750 const TemplateArgumentListInfo *TemplateArgs); 2751 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2752 SourceLocation TemplateKWLoc, 2753 LookupResult &R, 2754 const TemplateArgumentListInfo *TemplateArgs, 2755 bool IsDefiniteInstance); 2756 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2757 const LookupResult &R, 2758 bool HasTrailingLParen); 2759 2760 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2761 const DeclarationNameInfo &NameInfo); 2762 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2763 SourceLocation TemplateKWLoc, 2764 const DeclarationNameInfo &NameInfo, 2765 const TemplateArgumentListInfo *TemplateArgs); 2766 2767 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2768 LookupResult &R, 2769 bool NeedsADL); 2770 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2771 const DeclarationNameInfo &NameInfo, 2772 NamedDecl *D); 2773 2774 ExprResult BuildLiteralOperatorCall(LookupResult &R, 2775 DeclarationNameInfo &SuffixInfo, 2776 ArrayRef<Expr*> Args, 2777 SourceLocation LitEndLoc, 2778 TemplateArgumentListInfo *ExplicitTemplateArgs = 0); 2779 2780 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2781 ExprResult ActOnIntegerConstant(SourceLocation Loc, uint64_t Val); 2782 ExprResult ActOnNumericConstant(const Token &Tok, Scope *UDLScope = 0); 2783 ExprResult ActOnCharacterConstant(const Token &Tok, Scope *UDLScope = 0); 2784 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E); 2785 ExprResult ActOnParenListExpr(SourceLocation L, 2786 SourceLocation R, 2787 MultiExprArg Val); 2788 2789 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2790 /// fragments (e.g. "foo" "bar" L"baz"). 2791 ExprResult ActOnStringLiteral(const Token *StringToks, unsigned NumStringToks, 2792 Scope *UDLScope = 0); 2793 2794 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2795 SourceLocation DefaultLoc, 2796 SourceLocation RParenLoc, 2797 Expr *ControllingExpr, 2798 MultiTypeArg ArgTypes, 2799 MultiExprArg ArgExprs); 2800 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2801 SourceLocation DefaultLoc, 2802 SourceLocation RParenLoc, 2803 Expr *ControllingExpr, 2804 TypeSourceInfo **Types, 2805 Expr **Exprs, 2806 unsigned NumAssocs); 2807 2808 // Binary/Unary Operators. 'Tok' is the token for the operator. 2809 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2810 Expr *InputExpr); 2811 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2812 UnaryOperatorKind Opc, Expr *Input); 2813 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2814 tok::TokenKind Op, Expr *Input); 2815 2816 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo, 2817 SourceLocation OpLoc, 2818 UnaryExprOrTypeTrait ExprKind, 2819 SourceRange R); 2820 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2821 UnaryExprOrTypeTrait ExprKind); 2822 ExprResult 2823 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2824 UnaryExprOrTypeTrait ExprKind, 2825 bool IsType, void *TyOrEx, 2826 const SourceRange &ArgRange); 2827 2828 ExprResult CheckPlaceholderExpr(Expr *E); 2829 bool CheckVecStepExpr(Expr *E); 2830 2831 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2832 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc, 2833 SourceRange ExprRange, 2834 UnaryExprOrTypeTrait ExprKind); 2835 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2836 SourceLocation OpLoc, 2837 IdentifierInfo &Name, 2838 SourceLocation NameLoc, 2839 SourceLocation RParenLoc); 2840 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2841 tok::TokenKind Kind, Expr *Input); 2842 2843 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2844 Expr *Idx, SourceLocation RLoc); 2845 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2846 Expr *Idx, SourceLocation RLoc); 2847 2848 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2849 SourceLocation OpLoc, bool IsArrow, 2850 CXXScopeSpec &SS, 2851 SourceLocation TemplateKWLoc, 2852 NamedDecl *FirstQualifierInScope, 2853 const DeclarationNameInfo &NameInfo, 2854 const TemplateArgumentListInfo *TemplateArgs); 2855 2856 // This struct is for use by ActOnMemberAccess to allow 2857 // BuildMemberReferenceExpr to be able to reinvoke ActOnMemberAccess after 2858 // changing the access operator from a '.' to a '->' (to see if that is the 2859 // change needed to fix an error about an unknown member, e.g. when the class 2860 // defines a custom operator->). 2861 struct ActOnMemberAccessExtraArgs { 2862 Scope *S; 2863 UnqualifiedId &Id; 2864 Decl *ObjCImpDecl; 2865 bool HasTrailingLParen; 2866 }; 2867 2868 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2869 SourceLocation OpLoc, bool IsArrow, 2870 const CXXScopeSpec &SS, 2871 SourceLocation TemplateKWLoc, 2872 NamedDecl *FirstQualifierInScope, 2873 LookupResult &R, 2874 const TemplateArgumentListInfo *TemplateArgs, 2875 bool SuppressQualifierCheck = false, 2876 ActOnMemberAccessExtraArgs *ExtraArgs = 0); 2877 2878 ExprResult PerformMemberExprBaseConversion(Expr *Base, bool IsArrow); 2879 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2880 bool &IsArrow, SourceLocation OpLoc, 2881 CXXScopeSpec &SS, 2882 Decl *ObjCImpDecl, 2883 bool HasTemplateArgs); 2884 2885 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2886 const CXXScopeSpec &SS, 2887 const LookupResult &R); 2888 2889 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2890 bool IsArrow, SourceLocation OpLoc, 2891 const CXXScopeSpec &SS, 2892 SourceLocation TemplateKWLoc, 2893 NamedDecl *FirstQualifierInScope, 2894 const DeclarationNameInfo &NameInfo, 2895 const TemplateArgumentListInfo *TemplateArgs); 2896 2897 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2898 SourceLocation OpLoc, 2899 tok::TokenKind OpKind, 2900 CXXScopeSpec &SS, 2901 SourceLocation TemplateKWLoc, 2902 UnqualifiedId &Member, 2903 Decl *ObjCImpDecl, 2904 bool HasTrailingLParen); 2905 2906 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2907 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2908 FunctionDecl *FDecl, 2909 const FunctionProtoType *Proto, 2910 Expr **Args, unsigned NumArgs, 2911 SourceLocation RParenLoc, 2912 bool ExecConfig = false); 2913 void CheckStaticArrayArgument(SourceLocation CallLoc, 2914 ParmVarDecl *Param, 2915 const Expr *ArgExpr); 2916 2917 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2918 /// This provides the location of the left/right parens and a list of comma 2919 /// locations. 2920 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2921 MultiExprArg ArgExprs, SourceLocation RParenLoc, 2922 Expr *ExecConfig = 0, bool IsExecConfig = false); 2923 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2924 SourceLocation LParenLoc, 2925 Expr **Args, unsigned NumArgs, 2926 SourceLocation RParenLoc, 2927 Expr *Config = 0, 2928 bool IsExecConfig = false); 2929 2930 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2931 MultiExprArg ExecConfig, 2932 SourceLocation GGGLoc); 2933 2934 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2935 Declarator &D, ParsedType &Ty, 2936 SourceLocation RParenLoc, Expr *CastExpr); 2937 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2938 TypeSourceInfo *Ty, 2939 SourceLocation RParenLoc, 2940 Expr *Op); 2941 CastKind PrepareScalarCast(ExprResult &src, QualType destType); 2942 2943 /// \brief Build an altivec or OpenCL literal. 2944 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2945 SourceLocation RParenLoc, Expr *E, 2946 TypeSourceInfo *TInfo); 2947 2948 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2949 2950 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2951 ParsedType Ty, 2952 SourceLocation RParenLoc, 2953 Expr *InitExpr); 2954 2955 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2956 TypeSourceInfo *TInfo, 2957 SourceLocation RParenLoc, 2958 Expr *LiteralExpr); 2959 2960 ExprResult ActOnInitList(SourceLocation LBraceLoc, 2961 MultiExprArg InitArgList, 2962 SourceLocation RBraceLoc); 2963 2964 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2965 SourceLocation Loc, 2966 bool GNUSyntax, 2967 ExprResult Init); 2968 2969 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2970 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr); 2971 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2972 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr); 2973 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc, 2974 Expr *LHSExpr, Expr *RHSExpr); 2975 2976 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2977 /// in the case of a the GNU conditional expr extension. 2978 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2979 SourceLocation ColonLoc, 2980 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr); 2981 2982 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2983 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2984 LabelDecl *TheDecl); 2985 2986 void ActOnStartStmtExpr(); 2987 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2988 SourceLocation RPLoc); // "({..})" 2989 void ActOnStmtExprError(); 2990 2991 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2992 struct OffsetOfComponent { 2993 SourceLocation LocStart, LocEnd; 2994 bool isBrackets; // true if [expr], false if .ident 2995 union { 2996 IdentifierInfo *IdentInfo; 2997 Expr *E; 2998 } U; 2999 }; 3000 3001 /// __builtin_offsetof(type, a.b[123][456].c) 3002 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 3003 TypeSourceInfo *TInfo, 3004 OffsetOfComponent *CompPtr, 3005 unsigned NumComponents, 3006 SourceLocation RParenLoc); 3007 ExprResult ActOnBuiltinOffsetOf(Scope *S, 3008 SourceLocation BuiltinLoc, 3009 SourceLocation TypeLoc, 3010 ParsedType ParsedArgTy, 3011 OffsetOfComponent *CompPtr, 3012 unsigned NumComponents, 3013 SourceLocation RParenLoc); 3014 3015 // __builtin_choose_expr(constExpr, expr1, expr2) 3016 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 3017 Expr *CondExpr, Expr *LHSExpr, 3018 Expr *RHSExpr, SourceLocation RPLoc); 3019 3020 // __builtin_va_arg(expr, type) 3021 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, 3022 SourceLocation RPLoc); 3023 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E, 3024 TypeSourceInfo *TInfo, SourceLocation RPLoc); 3025 3026 // __null 3027 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 3028 3029 bool CheckCaseExpression(Expr *E); 3030 3031 /// \brief Describes the result of an "if-exists" condition check. 3032 enum IfExistsResult { 3033 /// \brief The symbol exists. 3034 IER_Exists, 3035 3036 /// \brief The symbol does not exist. 3037 IER_DoesNotExist, 3038 3039 /// \brief The name is a dependent name, so the results will differ 3040 /// from one instantiation to the next. 3041 IER_Dependent, 3042 3043 /// \brief An error occurred. 3044 IER_Error 3045 }; 3046 3047 IfExistsResult 3048 CheckMicrosoftIfExistsSymbol(Scope *S, CXXScopeSpec &SS, 3049 const DeclarationNameInfo &TargetNameInfo); 3050 3051 IfExistsResult 3052 CheckMicrosoftIfExistsSymbol(Scope *S, SourceLocation KeywordLoc, 3053 bool IsIfExists, CXXScopeSpec &SS, 3054 UnqualifiedId &Name); 3055 3056 StmtResult BuildMSDependentExistsStmt(SourceLocation KeywordLoc, 3057 bool IsIfExists, 3058 NestedNameSpecifierLoc QualifierLoc, 3059 DeclarationNameInfo NameInfo, 3060 Stmt *Nested); 3061 StmtResult ActOnMSDependentExistsStmt(SourceLocation KeywordLoc, 3062 bool IsIfExists, 3063 CXXScopeSpec &SS, UnqualifiedId &Name, 3064 Stmt *Nested); 3065 3066 //===------------------------- "Block" Extension ------------------------===// 3067 3068 /// ActOnBlockStart - This callback is invoked when a block literal is 3069 /// started. 3070 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 3071 3072 /// ActOnBlockArguments - This callback allows processing of block arguments. 3073 /// If there are no arguments, this is still invoked. 3074 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 3075 3076 /// ActOnBlockError - If there is an error parsing a block, this callback 3077 /// is invoked to pop the information about the block from the action impl. 3078 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 3079 3080 /// ActOnBlockStmtExpr - This is called when the body of a block statement 3081 /// literal was successfully completed. ^(int x){...} 3082 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body, 3083 Scope *CurScope); 3084 3085 //===---------------------------- OpenCL Features -----------------------===// 3086 3087 /// __builtin_astype(...) 3088 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, 3089 SourceLocation BuiltinLoc, 3090 SourceLocation RParenLoc); 3091 3092 //===---------------------------- C++ Features --------------------------===// 3093 3094 // Act on C++ namespaces 3095 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 3096 SourceLocation NamespaceLoc, 3097 SourceLocation IdentLoc, 3098 IdentifierInfo *Ident, 3099 SourceLocation LBrace, 3100 AttributeList *AttrList); 3101 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 3102 3103 NamespaceDecl *getStdNamespace() const; 3104 NamespaceDecl *getOrCreateStdNamespace(); 3105 3106 CXXRecordDecl *getStdBadAlloc() const; 3107 3108 /// \brief Tests whether Ty is an instance of std::initializer_list and, if 3109 /// it is and Element is not NULL, assigns the element type to Element. 3110 bool isStdInitializerList(QualType Ty, QualType *Element); 3111 3112 /// \brief Looks for the std::initializer_list template and instantiates it 3113 /// with Element, or emits an error if it's not found. 3114 /// 3115 /// \returns The instantiated template, or null on error. 3116 QualType BuildStdInitializerList(QualType Element, SourceLocation Loc); 3117 3118 /// \brief Determine whether Ctor is an initializer-list constructor, as 3119 /// defined in [dcl.init.list]p2. 3120 bool isInitListConstructor(const CXXConstructorDecl *Ctor); 3121 3122 Decl *ActOnUsingDirective(Scope *CurScope, 3123 SourceLocation UsingLoc, 3124 SourceLocation NamespcLoc, 3125 CXXScopeSpec &SS, 3126 SourceLocation IdentLoc, 3127 IdentifierInfo *NamespcName, 3128 AttributeList *AttrList); 3129 3130 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 3131 3132 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 3133 SourceLocation NamespaceLoc, 3134 SourceLocation AliasLoc, 3135 IdentifierInfo *Alias, 3136 CXXScopeSpec &SS, 3137 SourceLocation IdentLoc, 3138 IdentifierInfo *Ident); 3139 3140 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 3141 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 3142 const LookupResult &PreviousDecls); 3143 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 3144 NamedDecl *Target); 3145 3146 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 3147 bool isTypeName, 3148 const CXXScopeSpec &SS, 3149 SourceLocation NameLoc, 3150 const LookupResult &Previous); 3151 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 3152 const CXXScopeSpec &SS, 3153 SourceLocation NameLoc); 3154 3155 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 3156 SourceLocation UsingLoc, 3157 CXXScopeSpec &SS, 3158 const DeclarationNameInfo &NameInfo, 3159 AttributeList *AttrList, 3160 bool IsInstantiation, 3161 bool IsTypeName, 3162 SourceLocation TypenameLoc); 3163 3164 bool CheckInheritingConstructorUsingDecl(UsingDecl *UD); 3165 3166 Decl *ActOnUsingDeclaration(Scope *CurScope, 3167 AccessSpecifier AS, 3168 bool HasUsingKeyword, 3169 SourceLocation UsingLoc, 3170 CXXScopeSpec &SS, 3171 UnqualifiedId &Name, 3172 AttributeList *AttrList, 3173 bool IsTypeName, 3174 SourceLocation TypenameLoc); 3175 Decl *ActOnAliasDeclaration(Scope *CurScope, 3176 AccessSpecifier AS, 3177 MultiTemplateParamsArg TemplateParams, 3178 SourceLocation UsingLoc, 3179 UnqualifiedId &Name, 3180 TypeResult Type); 3181 3182 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 3183 /// and sets it as the initializer for the the passed in VarDecl. 3184 bool InitializeVarWithConstructor(VarDecl *VD, 3185 CXXConstructorDecl *Constructor, 3186 MultiExprArg Exprs, 3187 bool HadMultipleCandidates); 3188 3189 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 3190 /// including handling of its default argument expressions. 3191 /// 3192 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 3193 ExprResult 3194 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 3195 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 3196 bool HadMultipleCandidates, bool RequiresZeroInit, 3197 unsigned ConstructKind, SourceRange ParenRange); 3198 3199 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 3200 // the constructor can be elidable? 3201 ExprResult 3202 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 3203 CXXConstructorDecl *Constructor, bool Elidable, 3204 MultiExprArg Exprs, bool HadMultipleCandidates, 3205 bool RequiresZeroInit, unsigned ConstructKind, 3206 SourceRange ParenRange); 3207 3208 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 3209 /// the default expr if needed. 3210 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 3211 FunctionDecl *FD, 3212 ParmVarDecl *Param); 3213 3214 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 3215 /// constructed variable. 3216 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 3217 3218 /// \brief Helper class that collects exception specifications for 3219 /// implicitly-declared special member functions. 3220 class ImplicitExceptionSpecification { 3221 // Pointer to allow copying 3222 Sema *Self; 3223 // We order exception specifications thus: 3224 // noexcept is the most restrictive, but is only used in C++0x. 3225 // throw() comes next. 3226 // Then a throw(collected exceptions) 3227 // Finally no specification. 3228 // throw(...) is used instead if any called function uses it. 3229 // 3230 // If this exception specification cannot be known yet (for instance, 3231 // because this is the exception specification for a defaulted default 3232 // constructor and we haven't finished parsing the deferred parts of the 3233 // class yet), the C++0x standard does not specify how to behave. We 3234 // record this as an 'unknown' exception specification, which overrules 3235 // any other specification (even 'none', to keep this rule simple). 3236 ExceptionSpecificationType ComputedEST; 3237 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 3238 SmallVector<QualType, 4> Exceptions; 3239 3240 void ClearExceptions() { 3241 ExceptionsSeen.clear(); 3242 Exceptions.clear(); 3243 } 3244 3245 public: 3246 explicit ImplicitExceptionSpecification(Sema &Self) 3247 : Self(&Self), ComputedEST(EST_BasicNoexcept) { 3248 if (!Self.Context.getLangOpts().CPlusPlus0x) 3249 ComputedEST = EST_DynamicNone; 3250 } 3251 3252 /// \brief Get the computed exception specification type. 3253 ExceptionSpecificationType getExceptionSpecType() const { 3254 assert(ComputedEST != EST_ComputedNoexcept && 3255 "noexcept(expr) should not be a possible result"); 3256 return ComputedEST; 3257 } 3258 3259 /// \brief The number of exceptions in the exception specification. 3260 unsigned size() const { return Exceptions.size(); } 3261 3262 /// \brief The set of exceptions in the exception specification. 3263 const QualType *data() const { return Exceptions.data(); } 3264 3265 /// \brief Integrate another called method into the collected data. 3266 void CalledDecl(SourceLocation CallLoc, CXXMethodDecl *Method); 3267 3268 /// \brief Integrate an invoked expression into the collected data. 3269 void CalledExpr(Expr *E); 3270 3271 /// \brief Specify that the exception specification can't be detemined yet. 3272 void SetDelayed() { 3273 ClearExceptions(); 3274 ComputedEST = EST_Delayed; 3275 } 3276 3277 FunctionProtoType::ExtProtoInfo getEPI() const { 3278 FunctionProtoType::ExtProtoInfo EPI; 3279 EPI.ExceptionSpecType = getExceptionSpecType(); 3280 EPI.NumExceptions = size(); 3281 EPI.Exceptions = data(); 3282 return EPI; 3283 } 3284 }; 3285 3286 /// \brief Determine what sort of exception specification a defaulted 3287 /// copy constructor of a class will have. 3288 ImplicitExceptionSpecification 3289 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 3290 3291 /// \brief Determine what sort of exception specification a defaulted 3292 /// default constructor of a class will have, and whether the parameter 3293 /// will be const. 3294 std::pair<ImplicitExceptionSpecification, bool> 3295 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 3296 3297 /// \brief Determine what sort of exception specification a defautled 3298 /// copy assignment operator of a class will have, and whether the 3299 /// parameter will be const. 3300 std::pair<ImplicitExceptionSpecification, bool> 3301 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 3302 3303 /// \brief Determine what sort of exception specification a defaulted move 3304 /// constructor of a class will have. 3305 ImplicitExceptionSpecification 3306 ComputeDefaultedMoveCtorExceptionSpec(CXXRecordDecl *ClassDecl); 3307 3308 /// \brief Determine what sort of exception specification a defaulted move 3309 /// assignment operator of a class will have. 3310 ImplicitExceptionSpecification 3311 ComputeDefaultedMoveAssignmentExceptionSpec(CXXRecordDecl *ClassDecl); 3312 3313 /// \brief Determine what sort of exception specification a defaulted 3314 /// destructor of a class will have. 3315 ImplicitExceptionSpecification 3316 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 3317 3318 /// \brief Check the given exception-specification and update the 3319 /// extended prototype information with the results. 3320 void checkExceptionSpecification(ExceptionSpecificationType EST, 3321 ArrayRef<ParsedType> DynamicExceptions, 3322 ArrayRef<SourceRange> DynamicExceptionRanges, 3323 Expr *NoexceptExpr, 3324 llvm::SmallVectorImpl<QualType> &Exceptions, 3325 FunctionProtoType::ExtProtoInfo &EPI); 3326 3327 /// \brief Determine if a special member function should have a deleted 3328 /// definition when it is defaulted. 3329 bool ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM, 3330 bool Diagnose = false); 3331 3332 /// \brief Declare the implicit default constructor for the given class. 3333 /// 3334 /// \param ClassDecl The class declaration into which the implicit 3335 /// default constructor will be added. 3336 /// 3337 /// \returns The implicitly-declared default constructor. 3338 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 3339 CXXRecordDecl *ClassDecl); 3340 3341 /// DefineImplicitDefaultConstructor - Checks for feasibility of 3342 /// defining this constructor as the default constructor. 3343 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 3344 CXXConstructorDecl *Constructor); 3345 3346 /// \brief Declare the implicit destructor for the given class. 3347 /// 3348 /// \param ClassDecl The class declaration into which the implicit 3349 /// destructor will be added. 3350 /// 3351 /// \returns The implicitly-declared destructor. 3352 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 3353 3354 /// DefineImplicitDestructor - Checks for feasibility of 3355 /// defining this destructor as the default destructor. 3356 void DefineImplicitDestructor(SourceLocation CurrentLocation, 3357 CXXDestructorDecl *Destructor); 3358 3359 /// \brief Build an exception spec for destructors that don't have one. 3360 /// 3361 /// C++11 says that user-defined destructors with no exception spec get one 3362 /// that looks as if the destructor was implicitly declared. 3363 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 3364 CXXDestructorDecl *Destructor, 3365 bool WasDelayed = false); 3366 3367 /// \brief Declare all inherited constructors for the given class. 3368 /// 3369 /// \param ClassDecl The class declaration into which the inherited 3370 /// constructors will be added. 3371 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 3372 3373 /// \brief Declare the implicit copy constructor for the given class. 3374 /// 3375 /// \param ClassDecl The class declaration into which the implicit 3376 /// copy constructor will be added. 3377 /// 3378 /// \returns The implicitly-declared copy constructor. 3379 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 3380 3381 /// DefineImplicitCopyConstructor - Checks for feasibility of 3382 /// defining this constructor as the copy constructor. 3383 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 3384 CXXConstructorDecl *Constructor); 3385 3386 /// \brief Declare the implicit move constructor for the given class. 3387 /// 3388 /// \param ClassDecl The Class declaration into which the implicit 3389 /// move constructor will be added. 3390 /// 3391 /// \returns The implicitly-declared move constructor, or NULL if it wasn't 3392 /// declared. 3393 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl); 3394 3395 /// DefineImplicitMoveConstructor - Checks for feasibility of 3396 /// defining this constructor as the move constructor. 3397 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation, 3398 CXXConstructorDecl *Constructor); 3399 3400 /// \brief Declare the implicit copy assignment operator for the given class. 3401 /// 3402 /// \param ClassDecl The class declaration into which the implicit 3403 /// copy assignment operator will be added. 3404 /// 3405 /// \returns The implicitly-declared copy assignment operator. 3406 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 3407 3408 /// \brief Defines an implicitly-declared copy assignment operator. 3409 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 3410 CXXMethodDecl *MethodDecl); 3411 3412 /// \brief Declare the implicit move assignment operator for the given class. 3413 /// 3414 /// \param ClassDecl The Class declaration into which the implicit 3415 /// move assignment operator will be added. 3416 /// 3417 /// \returns The implicitly-declared move assignment operator, or NULL if it 3418 /// wasn't declared. 3419 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl); 3420 3421 /// \brief Defines an implicitly-declared move assignment operator. 3422 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation, 3423 CXXMethodDecl *MethodDecl); 3424 3425 /// \brief Force the declaration of any implicitly-declared members of this 3426 /// class. 3427 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 3428 3429 /// \brief Determine whether the given function is an implicitly-deleted 3430 /// special member function. 3431 bool isImplicitlyDeleted(FunctionDecl *FD); 3432 3433 /// \brief Check whether 'this' shows up in the type of a static member 3434 /// function after the (naturally empty) cv-qualifier-seq would be. 3435 /// 3436 /// \returns true if an error occurred. 3437 bool checkThisInStaticMemberFunctionType(CXXMethodDecl *Method); 3438 3439 /// \brief Whether this' shows up in the exception specification of a static 3440 /// member function. 3441 bool checkThisInStaticMemberFunctionExceptionSpec(CXXMethodDecl *Method); 3442 3443 /// \brief Check whether 'this' shows up in the attributes of the given 3444 /// static member function. 3445 /// 3446 /// \returns true if an error occurred. 3447 bool checkThisInStaticMemberFunctionAttributes(CXXMethodDecl *Method); 3448 3449 /// MaybeBindToTemporary - If the passed in expression has a record type with 3450 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 3451 /// it simply returns the passed in expression. 3452 ExprResult MaybeBindToTemporary(Expr *E); 3453 3454 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 3455 MultiExprArg ArgsPtr, 3456 SourceLocation Loc, 3457 ASTOwningVector<Expr*> &ConvertedArgs, 3458 bool AllowExplicit = false); 3459 3460 ParsedType getDestructorName(SourceLocation TildeLoc, 3461 IdentifierInfo &II, SourceLocation NameLoc, 3462 Scope *S, CXXScopeSpec &SS, 3463 ParsedType ObjectType, 3464 bool EnteringContext); 3465 3466 ParsedType getDestructorType(const DeclSpec& DS, ParsedType ObjectType); 3467 3468 // Checks that reinterpret casts don't have undefined behavior. 3469 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 3470 bool IsDereference, SourceRange Range); 3471 3472 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 3473 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 3474 tok::TokenKind Kind, 3475 SourceLocation LAngleBracketLoc, 3476 Declarator &D, 3477 SourceLocation RAngleBracketLoc, 3478 SourceLocation LParenLoc, 3479 Expr *E, 3480 SourceLocation RParenLoc); 3481 3482 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 3483 tok::TokenKind Kind, 3484 TypeSourceInfo *Ty, 3485 Expr *E, 3486 SourceRange AngleBrackets, 3487 SourceRange Parens); 3488 3489 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3490 SourceLocation TypeidLoc, 3491 TypeSourceInfo *Operand, 3492 SourceLocation RParenLoc); 3493 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3494 SourceLocation TypeidLoc, 3495 Expr *Operand, 3496 SourceLocation RParenLoc); 3497 3498 /// ActOnCXXTypeid - Parse typeid( something ). 3499 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 3500 SourceLocation LParenLoc, bool isType, 3501 void *TyOrExpr, 3502 SourceLocation RParenLoc); 3503 3504 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3505 SourceLocation TypeidLoc, 3506 TypeSourceInfo *Operand, 3507 SourceLocation RParenLoc); 3508 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3509 SourceLocation TypeidLoc, 3510 Expr *Operand, 3511 SourceLocation RParenLoc); 3512 3513 /// ActOnCXXUuidof - Parse __uuidof( something ). 3514 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 3515 SourceLocation LParenLoc, bool isType, 3516 void *TyOrExpr, 3517 SourceLocation RParenLoc); 3518 3519 3520 //// ActOnCXXThis - Parse 'this' pointer. 3521 ExprResult ActOnCXXThis(SourceLocation loc); 3522 3523 /// \brief Try to retrieve the type of the 'this' pointer. 3524 /// 3525 /// \param Capture If true, capture 'this' in this context. 3526 /// 3527 /// \returns The type of 'this', if possible. Otherwise, returns a NULL type. 3528 QualType getCurrentThisType(); 3529 3530 /// \brief When non-NULL, the C++ 'this' expression is allowed despite the 3531 /// current context not being a non-static member function. In such cases, 3532 /// this provides the type used for 'this'. 3533 QualType CXXThisTypeOverride; 3534 3535 /// \brief RAII object used to temporarily allow the C++ 'this' expression 3536 /// to be used, with the given qualifiers on the current class type. 3537 class CXXThisScopeRAII { 3538 Sema &S; 3539 QualType OldCXXThisTypeOverride; 3540 bool Enabled; 3541 3542 public: 3543 /// \brief Introduce a new scope where 'this' may be allowed (when enabled), 3544 /// using the given declaration (which is either a class template or a 3545 /// class) along with the given qualifiers. 3546 /// along with the qualifiers placed on '*this'. 3547 CXXThisScopeRAII(Sema &S, Decl *ContextDecl, unsigned CXXThisTypeQuals, 3548 bool Enabled = true); 3549 3550 ~CXXThisScopeRAII(); 3551 }; 3552 3553 /// \brief Make sure the value of 'this' is actually available in the current 3554 /// context, if it is a potentially evaluated context. 3555 /// 3556 /// \param Loc The location at which the capture of 'this' occurs. 3557 /// 3558 /// \param Explicit Whether 'this' is explicitly captured in a lambda 3559 /// capture list. 3560 void CheckCXXThisCapture(SourceLocation Loc, bool Explicit = false); 3561 3562 /// \brief Determine whether the given type is the type of *this that is used 3563 /// outside of the body of a member function for a type that is currently 3564 /// being defined. 3565 bool isThisOutsideMemberFunctionBody(QualType BaseType); 3566 3567 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 3568 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 3569 3570 3571 /// ActOnObjCBoolLiteral - Parse {__objc_yes,__objc_no} literals. 3572 ExprResult ActOnObjCBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 3573 3574 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 3575 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 3576 3577 //// ActOnCXXThrow - Parse throw expressions. 3578 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 3579 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 3580 bool IsThrownVarInScope); 3581 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 3582 bool IsThrownVarInScope); 3583 3584 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 3585 /// Can be interpreted either as function-style casting ("int(x)") 3586 /// or class type construction ("ClassType(x,y,z)") 3587 /// or creation of a value-initialized type ("int()"). 3588 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 3589 SourceLocation LParenLoc, 3590 MultiExprArg Exprs, 3591 SourceLocation RParenLoc); 3592 3593 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 3594 SourceLocation LParenLoc, 3595 MultiExprArg Exprs, 3596 SourceLocation RParenLoc); 3597 3598 /// ActOnCXXNew - Parsed a C++ 'new' expression. 3599 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 3600 SourceLocation PlacementLParen, 3601 MultiExprArg PlacementArgs, 3602 SourceLocation PlacementRParen, 3603 SourceRange TypeIdParens, Declarator &D, 3604 Expr *Initializer); 3605 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 3606 SourceLocation PlacementLParen, 3607 MultiExprArg PlacementArgs, 3608 SourceLocation PlacementRParen, 3609 SourceRange TypeIdParens, 3610 QualType AllocType, 3611 TypeSourceInfo *AllocTypeInfo, 3612 Expr *ArraySize, 3613 SourceRange DirectInitRange, 3614 Expr *Initializer, 3615 bool TypeMayContainAuto = true); 3616 3617 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 3618 SourceRange R); 3619 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 3620 bool UseGlobal, QualType AllocType, bool IsArray, 3621 Expr **PlaceArgs, unsigned NumPlaceArgs, 3622 FunctionDecl *&OperatorNew, 3623 FunctionDecl *&OperatorDelete); 3624 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 3625 DeclarationName Name, Expr** Args, 3626 unsigned NumArgs, DeclContext *Ctx, 3627 bool AllowMissing, FunctionDecl *&Operator, 3628 bool Diagnose = true); 3629 void DeclareGlobalNewDelete(); 3630 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 3631 QualType Argument, 3632 bool addMallocAttr = false); 3633 3634 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 3635 DeclarationName Name, FunctionDecl* &Operator, 3636 bool Diagnose = true); 3637 3638 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 3639 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 3640 bool UseGlobal, bool ArrayForm, 3641 Expr *Operand); 3642 3643 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 3644 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 3645 SourceLocation StmtLoc, 3646 bool ConvertToBoolean); 3647 3648 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 3649 Expr *Operand, SourceLocation RParen); 3650 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 3651 SourceLocation RParen); 3652 3653 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 3654 /// pseudo-functions. 3655 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 3656 SourceLocation KWLoc, 3657 ParsedType Ty, 3658 SourceLocation RParen); 3659 3660 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3661 SourceLocation KWLoc, 3662 TypeSourceInfo *T, 3663 SourceLocation RParen); 3664 3665 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3666 /// pseudo-functions. 3667 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3668 SourceLocation KWLoc, 3669 ParsedType LhsTy, 3670 ParsedType RhsTy, 3671 SourceLocation RParen); 3672 3673 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3674 SourceLocation KWLoc, 3675 TypeSourceInfo *LhsT, 3676 TypeSourceInfo *RhsT, 3677 SourceLocation RParen); 3678 3679 /// \brief Parsed one of the type trait support pseudo-functions. 3680 ExprResult ActOnTypeTrait(TypeTrait Kind, SourceLocation KWLoc, 3681 ArrayRef<ParsedType> Args, 3682 SourceLocation RParenLoc); 3683 ExprResult BuildTypeTrait(TypeTrait Kind, SourceLocation KWLoc, 3684 ArrayRef<TypeSourceInfo *> Args, 3685 SourceLocation RParenLoc); 3686 3687 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3688 /// pseudo-functions. 3689 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3690 SourceLocation KWLoc, 3691 ParsedType LhsTy, 3692 Expr *DimExpr, 3693 SourceLocation RParen); 3694 3695 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3696 SourceLocation KWLoc, 3697 TypeSourceInfo *TSInfo, 3698 Expr *DimExpr, 3699 SourceLocation RParen); 3700 3701 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3702 /// pseudo-functions. 3703 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3704 SourceLocation KWLoc, 3705 Expr *Queried, 3706 SourceLocation RParen); 3707 3708 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3709 SourceLocation KWLoc, 3710 Expr *Queried, 3711 SourceLocation RParen); 3712 3713 ExprResult ActOnStartCXXMemberReference(Scope *S, 3714 Expr *Base, 3715 SourceLocation OpLoc, 3716 tok::TokenKind OpKind, 3717 ParsedType &ObjectType, 3718 bool &MayBePseudoDestructor); 3719 3720 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3721 3722 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3723 SourceLocation OpLoc, 3724 tok::TokenKind OpKind, 3725 const CXXScopeSpec &SS, 3726 TypeSourceInfo *ScopeType, 3727 SourceLocation CCLoc, 3728 SourceLocation TildeLoc, 3729 PseudoDestructorTypeStorage DestroyedType, 3730 bool HasTrailingLParen); 3731 3732 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3733 SourceLocation OpLoc, 3734 tok::TokenKind OpKind, 3735 CXXScopeSpec &SS, 3736 UnqualifiedId &FirstTypeName, 3737 SourceLocation CCLoc, 3738 SourceLocation TildeLoc, 3739 UnqualifiedId &SecondTypeName, 3740 bool HasTrailingLParen); 3741 3742 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3743 SourceLocation OpLoc, 3744 tok::TokenKind OpKind, 3745 SourceLocation TildeLoc, 3746 const DeclSpec& DS, 3747 bool HasTrailingLParen); 3748 3749 /// MaybeCreateExprWithCleanups - If the current full-expression 3750 /// requires any cleanups, surround it with a ExprWithCleanups node. 3751 /// Otherwise, just returns the passed-in expression. 3752 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3753 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3754 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3755 3756 ExprResult ActOnFinishFullExpr(Expr *Expr); 3757 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3758 3759 // Marks SS invalid if it represents an incomplete type. 3760 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3761 3762 DeclContext *computeDeclContext(QualType T); 3763 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3764 bool EnteringContext = false); 3765 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3766 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3767 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3768 3769 /// \brief The parser has parsed a global nested-name-specifier '::'. 3770 /// 3771 /// \param S The scope in which this nested-name-specifier occurs. 3772 /// 3773 /// \param CCLoc The location of the '::'. 3774 /// 3775 /// \param SS The nested-name-specifier, which will be updated in-place 3776 /// to reflect the parsed nested-name-specifier. 3777 /// 3778 /// \returns true if an error occurred, false otherwise. 3779 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3780 CXXScopeSpec &SS); 3781 3782 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3783 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3784 3785 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3786 SourceLocation IdLoc, 3787 IdentifierInfo &II, 3788 ParsedType ObjectType); 3789 3790 bool BuildCXXNestedNameSpecifier(Scope *S, 3791 IdentifierInfo &Identifier, 3792 SourceLocation IdentifierLoc, 3793 SourceLocation CCLoc, 3794 QualType ObjectType, 3795 bool EnteringContext, 3796 CXXScopeSpec &SS, 3797 NamedDecl *ScopeLookupResult, 3798 bool ErrorRecoveryLookup); 3799 3800 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3801 /// 3802 /// \param S The scope in which this nested-name-specifier occurs. 3803 /// 3804 /// \param Identifier The identifier preceding the '::'. 3805 /// 3806 /// \param IdentifierLoc The location of the identifier. 3807 /// 3808 /// \param CCLoc The location of the '::'. 3809 /// 3810 /// \param ObjectType The type of the object, if we're parsing 3811 /// nested-name-specifier in a member access expression. 3812 /// 3813 /// \param EnteringContext Whether we're entering the context nominated by 3814 /// this nested-name-specifier. 3815 /// 3816 /// \param SS The nested-name-specifier, which is both an input 3817 /// parameter (the nested-name-specifier before this type) and an 3818 /// output parameter (containing the full nested-name-specifier, 3819 /// including this new type). 3820 /// 3821 /// \returns true if an error occurred, false otherwise. 3822 bool ActOnCXXNestedNameSpecifier(Scope *S, 3823 IdentifierInfo &Identifier, 3824 SourceLocation IdentifierLoc, 3825 SourceLocation CCLoc, 3826 ParsedType ObjectType, 3827 bool EnteringContext, 3828 CXXScopeSpec &SS); 3829 3830 ExprResult ActOnDecltypeExpression(Expr *E); 3831 3832 bool ActOnCXXNestedNameSpecifierDecltype(CXXScopeSpec &SS, 3833 const DeclSpec &DS, 3834 SourceLocation ColonColonLoc); 3835 3836 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3837 IdentifierInfo &Identifier, 3838 SourceLocation IdentifierLoc, 3839 SourceLocation ColonLoc, 3840 ParsedType ObjectType, 3841 bool EnteringContext); 3842 3843 /// \brief The parser has parsed a nested-name-specifier 3844 /// 'template[opt] template-name < template-args >::'. 3845 /// 3846 /// \param S The scope in which this nested-name-specifier occurs. 3847 /// 3848 /// \param SS The nested-name-specifier, which is both an input 3849 /// parameter (the nested-name-specifier before this type) and an 3850 /// output parameter (containing the full nested-name-specifier, 3851 /// including this new type). 3852 /// 3853 /// \param TemplateKWLoc the location of the 'template' keyword, if any. 3854 /// \param TemplateName The template name. 3855 /// \param TemplateNameLoc The location of the template name. 3856 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3857 /// \param TemplateArgs The template arguments. 3858 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3859 /// \param CCLoc The location of the '::'. 3860 /// 3861 /// \param EnteringContext Whether we're entering the context of the 3862 /// nested-name-specifier. 3863 /// 3864 /// 3865 /// \returns true if an error occurred, false otherwise. 3866 bool ActOnCXXNestedNameSpecifier(Scope *S, 3867 CXXScopeSpec &SS, 3868 SourceLocation TemplateKWLoc, 3869 TemplateTy Template, 3870 SourceLocation TemplateNameLoc, 3871 SourceLocation LAngleLoc, 3872 ASTTemplateArgsPtr TemplateArgs, 3873 SourceLocation RAngleLoc, 3874 SourceLocation CCLoc, 3875 bool EnteringContext); 3876 3877 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3878 /// that the parser can use later to reconstruct the given 3879 /// nested-name-specifier. 3880 /// 3881 /// \param SS A nested-name-specifier. 3882 /// 3883 /// \returns A pointer containing all of the information in the 3884 /// nested-name-specifier \p SS. 3885 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3886 3887 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3888 /// the nested-name-specifier structure. 3889 /// 3890 /// \param Annotation The annotation pointer, produced by 3891 /// \c SaveNestedNameSpecifierAnnotation(). 3892 /// 3893 /// \param AnnotationRange The source range corresponding to the annotation. 3894 /// 3895 /// \param SS The nested-name-specifier that will be updated with the contents 3896 /// of the annotation pointer. 3897 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3898 SourceRange AnnotationRange, 3899 CXXScopeSpec &SS); 3900 3901 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3902 3903 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3904 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3905 /// After this method is called, according to [C++ 3.4.3p3], names should be 3906 /// looked up in the declarator-id's scope, until the declarator is parsed and 3907 /// ActOnCXXExitDeclaratorScope is called. 3908 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3909 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3910 3911 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3912 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3913 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3914 /// Used to indicate that names should revert to being looked up in the 3915 /// defining scope. 3916 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3917 3918 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3919 /// initializer for the declaration 'Dcl'. 3920 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3921 /// static data member of class X, names should be looked up in the scope of 3922 /// class X. 3923 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3924 3925 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3926 /// initializer for the declaration 'Dcl'. 3927 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3928 3929 /// \brief Create a new lambda closure type. 3930 CXXRecordDecl *createLambdaClosureType(SourceRange IntroducerRange, 3931 bool KnownDependent = false); 3932 3933 /// \brief Start the definition of a lambda expression. 3934 CXXMethodDecl *startLambdaDefinition(CXXRecordDecl *Class, 3935 SourceRange IntroducerRange, 3936 TypeSourceInfo *MethodType, 3937 SourceLocation EndLoc, 3938 llvm::ArrayRef<ParmVarDecl *> Params, 3939 llvm::Optional<unsigned> ManglingNumber 3940 = llvm::Optional<unsigned>(), 3941 Decl *ContextDecl = 0); 3942 3943 /// \brief Introduce the scope for a lambda expression. 3944 sema::LambdaScopeInfo *enterLambdaScope(CXXMethodDecl *CallOperator, 3945 SourceRange IntroducerRange, 3946 LambdaCaptureDefault CaptureDefault, 3947 bool ExplicitParams, 3948 bool ExplicitResultType, 3949 bool Mutable); 3950 3951 /// \brief Note that we have finished the explicit captures for the 3952 /// given lambda. 3953 void finishLambdaExplicitCaptures(sema::LambdaScopeInfo *LSI); 3954 3955 /// \brief Introduce the lambda parameters into scope. 3956 void addLambdaParameters(CXXMethodDecl *CallOperator, Scope *CurScope); 3957 3958 /// ActOnStartOfLambdaDefinition - This is called just before we start 3959 /// parsing the body of a lambda; it analyzes the explicit captures and 3960 /// arguments, and sets up various data-structures for the body of the 3961 /// lambda. 3962 void ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro, 3963 Declarator &ParamInfo, Scope *CurScope); 3964 3965 /// ActOnLambdaError - If there is an error parsing a lambda, this callback 3966 /// is invoked to pop the information about the lambda. 3967 void ActOnLambdaError(SourceLocation StartLoc, Scope *CurScope, 3968 bool IsInstantiation = false); 3969 3970 /// ActOnLambdaExpr - This is called when the body of a lambda expression 3971 /// was successfully completed. 3972 ExprResult ActOnLambdaExpr(SourceLocation StartLoc, Stmt *Body, 3973 Scope *CurScope, 3974 bool IsInstantiation = false); 3975 3976 /// \brief Define the "body" of the conversion from a lambda object to a 3977 /// function pointer. 3978 /// 3979 /// This routine doesn't actually define a sensible body; rather, it fills 3980 /// in the initialization expression needed to copy the lambda object into 3981 /// the block, and IR generation actually generates the real body of the 3982 /// block pointer conversion. 3983 void DefineImplicitLambdaToFunctionPointerConversion( 3984 SourceLocation CurrentLoc, CXXConversionDecl *Conv); 3985 3986 /// \brief Define the "body" of the conversion from a lambda object to a 3987 /// block pointer. 3988 /// 3989 /// This routine doesn't actually define a sensible body; rather, it fills 3990 /// in the initialization expression needed to copy the lambda object into 3991 /// the block, and IR generation actually generates the real body of the 3992 /// block pointer conversion. 3993 void DefineImplicitLambdaToBlockPointerConversion(SourceLocation CurrentLoc, 3994 CXXConversionDecl *Conv); 3995 3996 ExprResult BuildBlockForLambdaConversion(SourceLocation CurrentLocation, 3997 SourceLocation ConvLocation, 3998 CXXConversionDecl *Conv, 3999 Expr *Src); 4000 4001 // ParseObjCStringLiteral - Parse Objective-C string literals. 4002 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 4003 Expr **Strings, 4004 unsigned NumStrings); 4005 4006 ExprResult BuildObjCStringLiteral(SourceLocation AtLoc, StringLiteral *S); 4007 4008 /// BuildObjCNumericLiteral - builds an ObjCBoxedExpr AST node for the 4009 /// numeric literal expression. Type of the expression will be "NSNumber *" 4010 /// or "id" if NSNumber is unavailable. 4011 ExprResult BuildObjCNumericLiteral(SourceLocation AtLoc, Expr *Number); 4012 ExprResult ActOnObjCBoolLiteral(SourceLocation AtLoc, SourceLocation ValueLoc, 4013 bool Value); 4014 ExprResult BuildObjCArrayLiteral(SourceRange SR, MultiExprArg Elements); 4015 4016 // BuildObjCBoxedExpr - builds an ObjCBoxedExpr AST node for the 4017 // '@' prefixed parenthesized expression. The type of the expression will 4018 // either be "NSNumber *" or "NSString *" depending on the type of 4019 // ValueType, which is allowed to be a built-in numeric type or 4020 // "char *" or "const char *". 4021 ExprResult BuildObjCBoxedExpr(SourceRange SR, Expr *ValueExpr); 4022 4023 ExprResult BuildObjCSubscriptExpression(SourceLocation RB, Expr *BaseExpr, 4024 Expr *IndexExpr, 4025 ObjCMethodDecl *getterMethod, 4026 ObjCMethodDecl *setterMethod); 4027 4028 ExprResult BuildObjCDictionaryLiteral(SourceRange SR, 4029 ObjCDictionaryElement *Elements, 4030 unsigned NumElements); 4031 4032 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 4033 TypeSourceInfo *EncodedTypeInfo, 4034 SourceLocation RParenLoc); 4035 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 4036 CXXConversionDecl *Method, 4037 bool HadMultipleCandidates); 4038 4039 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 4040 SourceLocation EncodeLoc, 4041 SourceLocation LParenLoc, 4042 ParsedType Ty, 4043 SourceLocation RParenLoc); 4044 4045 // ParseObjCSelectorExpression - Build selector expression for @selector 4046 ExprResult ParseObjCSelectorExpression(Selector Sel, 4047 SourceLocation AtLoc, 4048 SourceLocation SelLoc, 4049 SourceLocation LParenLoc, 4050 SourceLocation RParenLoc); 4051 4052 // ParseObjCProtocolExpression - Build protocol expression for @protocol 4053 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 4054 SourceLocation AtLoc, 4055 SourceLocation ProtoLoc, 4056 SourceLocation LParenLoc, 4057 SourceLocation RParenLoc); 4058 4059 //===--------------------------------------------------------------------===// 4060 // C++ Declarations 4061 // 4062 Decl *ActOnStartLinkageSpecification(Scope *S, 4063 SourceLocation ExternLoc, 4064 SourceLocation LangLoc, 4065 StringRef Lang, 4066 SourceLocation LBraceLoc); 4067 Decl *ActOnFinishLinkageSpecification(Scope *S, 4068 Decl *LinkageSpec, 4069 SourceLocation RBraceLoc); 4070 4071 4072 //===--------------------------------------------------------------------===// 4073 // C++ Classes 4074 // 4075 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 4076 const CXXScopeSpec *SS = 0); 4077 4078 bool ActOnAccessSpecifier(AccessSpecifier Access, 4079 SourceLocation ASLoc, 4080 SourceLocation ColonLoc, 4081 AttributeList *Attrs = 0); 4082 4083 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 4084 Declarator &D, 4085 MultiTemplateParamsArg TemplateParameterLists, 4086 Expr *BitfieldWidth, const VirtSpecifiers &VS, 4087 bool HasDeferredInit); 4088 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 4089 Expr *Init); 4090 4091 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 4092 Scope *S, 4093 CXXScopeSpec &SS, 4094 IdentifierInfo *MemberOrBase, 4095 ParsedType TemplateTypeTy, 4096 const DeclSpec &DS, 4097 SourceLocation IdLoc, 4098 SourceLocation LParenLoc, 4099 Expr **Args, unsigned NumArgs, 4100 SourceLocation RParenLoc, 4101 SourceLocation EllipsisLoc); 4102 4103 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 4104 Scope *S, 4105 CXXScopeSpec &SS, 4106 IdentifierInfo *MemberOrBase, 4107 ParsedType TemplateTypeTy, 4108 const DeclSpec &DS, 4109 SourceLocation IdLoc, 4110 Expr *InitList, 4111 SourceLocation EllipsisLoc); 4112 4113 MemInitResult BuildMemInitializer(Decl *ConstructorD, 4114 Scope *S, 4115 CXXScopeSpec &SS, 4116 IdentifierInfo *MemberOrBase, 4117 ParsedType TemplateTypeTy, 4118 const DeclSpec &DS, 4119 SourceLocation IdLoc, 4120 Expr *Init, 4121 SourceLocation EllipsisLoc); 4122 4123 MemInitResult BuildMemberInitializer(ValueDecl *Member, 4124 Expr *Init, 4125 SourceLocation IdLoc); 4126 4127 MemInitResult BuildBaseInitializer(QualType BaseType, 4128 TypeSourceInfo *BaseTInfo, 4129 Expr *Init, 4130 CXXRecordDecl *ClassDecl, 4131 SourceLocation EllipsisLoc); 4132 4133 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 4134 Expr *Init, 4135 CXXRecordDecl *ClassDecl); 4136 4137 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 4138 CXXCtorInitializer *Initializer); 4139 4140 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 4141 CXXCtorInitializer **Initializers, 4142 unsigned NumInitializers, bool AnyErrors); 4143 4144 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 4145 4146 4147 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 4148 /// mark all the non-trivial destructors of its members and bases as 4149 /// referenced. 4150 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 4151 CXXRecordDecl *Record); 4152 4153 /// \brief The list of classes whose vtables have been used within 4154 /// this translation unit, and the source locations at which the 4155 /// first use occurred. 4156 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 4157 4158 /// \brief The list of vtables that are required but have not yet been 4159 /// materialized. 4160 SmallVector<VTableUse, 16> VTableUses; 4161 4162 /// \brief The set of classes whose vtables have been used within 4163 /// this translation unit, and a bit that will be true if the vtable is 4164 /// required to be emitted (otherwise, it should be emitted only if needed 4165 /// by code generation). 4166 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 4167 4168 /// \brief Load any externally-stored vtable uses. 4169 void LoadExternalVTableUses(); 4170 4171 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 4172 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 4173 DynamicClassesType; 4174 4175 /// \brief A list of all of the dynamic classes in this translation 4176 /// unit. 4177 DynamicClassesType DynamicClasses; 4178 4179 /// \brief Note that the vtable for the given class was used at the 4180 /// given location. 4181 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 4182 bool DefinitionRequired = false); 4183 4184 /// MarkVirtualMembersReferenced - Will mark all members of the given 4185 /// CXXRecordDecl referenced. 4186 void MarkVirtualMembersReferenced(SourceLocation Loc, 4187 const CXXRecordDecl *RD); 4188 4189 /// \brief Define all of the vtables that have been used in this 4190 /// translation unit and reference any virtual members used by those 4191 /// vtables. 4192 /// 4193 /// \returns true if any work was done, false otherwise. 4194 bool DefineUsedVTables(); 4195 4196 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 4197 4198 void ActOnMemInitializers(Decl *ConstructorDecl, 4199 SourceLocation ColonLoc, 4200 CXXCtorInitializer **MemInits, 4201 unsigned NumMemInits, 4202 bool AnyErrors); 4203 4204 void CheckCompletedCXXClass(CXXRecordDecl *Record); 4205 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 4206 Decl *TagDecl, 4207 SourceLocation LBrac, 4208 SourceLocation RBrac, 4209 AttributeList *AttrList); 4210 void ActOnFinishCXXMemberDecls(); 4211 4212 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 4213 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 4214 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 4215 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 4216 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 4217 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 4218 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 4219 void ActOnFinishDelayedMemberInitializers(Decl *Record); 4220 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 4221 bool IsInsideALocalClassWithinATemplateFunction(); 4222 4223 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 4224 Expr *AssertExpr, 4225 Expr *AssertMessageExpr, 4226 SourceLocation RParenLoc); 4227 4228 FriendDecl *CheckFriendTypeDecl(SourceLocation Loc, 4229 SourceLocation FriendLoc, 4230 TypeSourceInfo *TSInfo); 4231 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 4232 MultiTemplateParamsArg TemplateParams); 4233 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, 4234 MultiTemplateParamsArg TemplateParams); 4235 4236 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 4237 StorageClass& SC); 4238 void CheckConstructor(CXXConstructorDecl *Constructor); 4239 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 4240 StorageClass& SC); 4241 bool CheckDestructor(CXXDestructorDecl *Destructor); 4242 void CheckConversionDeclarator(Declarator &D, QualType &R, 4243 StorageClass& SC); 4244 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 4245 4246 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 4247 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 4248 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 4249 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 4250 void CheckExplicitlyDefaultedMoveConstructor(CXXConstructorDecl *Ctor); 4251 void CheckExplicitlyDefaultedMoveAssignment(CXXMethodDecl *Method); 4252 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 4253 4254 //===--------------------------------------------------------------------===// 4255 // C++ Derived Classes 4256 // 4257 4258 /// ActOnBaseSpecifier - Parsed a base specifier 4259 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 4260 SourceRange SpecifierRange, 4261 bool Virtual, AccessSpecifier Access, 4262 TypeSourceInfo *TInfo, 4263 SourceLocation EllipsisLoc); 4264 4265 BaseResult ActOnBaseSpecifier(Decl *classdecl, 4266 SourceRange SpecifierRange, 4267 bool Virtual, AccessSpecifier Access, 4268 ParsedType basetype, 4269 SourceLocation BaseLoc, 4270 SourceLocation EllipsisLoc); 4271 4272 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 4273 unsigned NumBases); 4274 void ActOnBaseSpecifiers(Decl *ClassDecl, CXXBaseSpecifier **Bases, 4275 unsigned NumBases); 4276 4277 bool IsDerivedFrom(QualType Derived, QualType Base); 4278 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 4279 4280 // FIXME: I don't like this name. 4281 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 4282 4283 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 4284 4285 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 4286 SourceLocation Loc, SourceRange Range, 4287 CXXCastPath *BasePath = 0, 4288 bool IgnoreAccess = false); 4289 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 4290 unsigned InaccessibleBaseID, 4291 unsigned AmbigiousBaseConvID, 4292 SourceLocation Loc, SourceRange Range, 4293 DeclarationName Name, 4294 CXXCastPath *BasePath); 4295 4296 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 4297 4298 /// CheckOverridingFunctionReturnType - Checks whether the return types are 4299 /// covariant, according to C++ [class.virtual]p5. 4300 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 4301 const CXXMethodDecl *Old); 4302 4303 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 4304 /// spec is a subset of base spec. 4305 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 4306 const CXXMethodDecl *Old); 4307 4308 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 4309 4310 /// CheckOverrideControl - Check C++0x override control semantics. 4311 void CheckOverrideControl(const Decl *D); 4312 4313 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 4314 /// overrides a virtual member function marked 'final', according to 4315 /// C++0x [class.virtual]p3. 4316 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 4317 const CXXMethodDecl *Old); 4318 4319 4320 //===--------------------------------------------------------------------===// 4321 // C++ Access Control 4322 // 4323 4324 enum AccessResult { 4325 AR_accessible, 4326 AR_inaccessible, 4327 AR_dependent, 4328 AR_delayed 4329 }; 4330 4331 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 4332 NamedDecl *PrevMemberDecl, 4333 AccessSpecifier LexicalAS); 4334 4335 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 4336 DeclAccessPair FoundDecl); 4337 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 4338 DeclAccessPair FoundDecl); 4339 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 4340 SourceRange PlacementRange, 4341 CXXRecordDecl *NamingClass, 4342 DeclAccessPair FoundDecl, 4343 bool Diagnose = true); 4344 AccessResult CheckConstructorAccess(SourceLocation Loc, 4345 CXXConstructorDecl *D, 4346 const InitializedEntity &Entity, 4347 AccessSpecifier Access, 4348 bool IsCopyBindingRefToTemp = false); 4349 AccessResult CheckConstructorAccess(SourceLocation Loc, 4350 CXXConstructorDecl *D, 4351 const InitializedEntity &Entity, 4352 AccessSpecifier Access, 4353 const PartialDiagnostic &PDiag); 4354 AccessResult CheckDestructorAccess(SourceLocation Loc, 4355 CXXDestructorDecl *Dtor, 4356 const PartialDiagnostic &PDiag, 4357 QualType objectType = QualType()); 4358 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 4359 NamedDecl *D, 4360 const PartialDiagnostic &PDiag); 4361 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 4362 Expr *ObjectExpr, 4363 Expr *ArgExpr, 4364 DeclAccessPair FoundDecl); 4365 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 4366 DeclAccessPair FoundDecl); 4367 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 4368 QualType Base, QualType Derived, 4369 const CXXBasePath &Path, 4370 unsigned DiagID, 4371 bool ForceCheck = false, 4372 bool ForceUnprivileged = false); 4373 void CheckLookupAccess(const LookupResult &R); 4374 bool IsSimplyAccessible(NamedDecl *decl, DeclContext *Ctx); 4375 bool isSpecialMemberAccessibleForDeletion(CXXMethodDecl *decl, 4376 AccessSpecifier access, 4377 QualType objectType); 4378 4379 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 4380 const MultiLevelTemplateArgumentList &TemplateArgs); 4381 void PerformDependentDiagnostics(const DeclContext *Pattern, 4382 const MultiLevelTemplateArgumentList &TemplateArgs); 4383 4384 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 4385 4386 /// A flag to suppress access checking. 4387 bool SuppressAccessChecking; 4388 4389 /// \brief When true, access checking violations are treated as SFINAE 4390 /// failures rather than hard errors. 4391 bool AccessCheckingSFINAE; 4392 4393 /// \brief RAII object used to temporarily suppress access checking. 4394 class SuppressAccessChecksRAII { 4395 Sema &S; 4396 bool SuppressingAccess; 4397 4398 public: 4399 SuppressAccessChecksRAII(Sema &S, bool Suppress) 4400 : S(S), SuppressingAccess(Suppress) { 4401 if (Suppress) S.ActOnStartSuppressingAccessChecks(); 4402 } 4403 ~SuppressAccessChecksRAII() { 4404 done(); 4405 } 4406 void done() { 4407 if (!SuppressingAccess) return; 4408 S.ActOnStopSuppressingAccessChecks(); 4409 SuppressingAccess = false; 4410 } 4411 }; 4412 4413 void ActOnStartSuppressingAccessChecks(); 4414 void ActOnStopSuppressingAccessChecks(); 4415 4416 enum AbstractDiagSelID { 4417 AbstractNone = -1, 4418 AbstractReturnType, 4419 AbstractParamType, 4420 AbstractVariableType, 4421 AbstractFieldType, 4422 AbstractArrayType 4423 }; 4424 4425 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 4426 TypeDiagnoser &Diagnoser); 4427 template<typename T1> 4428 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 4429 unsigned DiagID, 4430 const T1 &Arg1) { 4431 BoundTypeDiagnoser1<T1> Diagnoser(DiagID, Arg1); 4432 return RequireNonAbstractType(Loc, T, Diagnoser); 4433 } 4434 4435 template<typename T1, typename T2> 4436 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 4437 unsigned DiagID, 4438 const T1 &Arg1, const T2 &Arg2) { 4439 BoundTypeDiagnoser2<T1, T2> Diagnoser(DiagID, Arg1, Arg2); 4440 return RequireNonAbstractType(Loc, T, Diagnoser); 4441 } 4442 4443 template<typename T1, typename T2, typename T3> 4444 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 4445 unsigned DiagID, 4446 const T1 &Arg1, const T2 &Arg2, const T3 &Arg3) { 4447 BoundTypeDiagnoser3<T1, T2, T3> Diagnoser(DiagID, Arg1, Arg2, Arg3); 4448 return RequireNonAbstractType(Loc, T, Diagnoser); 4449 } 4450 4451 void DiagnoseAbstractType(const CXXRecordDecl *RD); 4452 4453 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 4454 AbstractDiagSelID SelID = AbstractNone); 4455 4456 //===--------------------------------------------------------------------===// 4457 // C++ Overloaded Operators [C++ 13.5] 4458 // 4459 4460 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 4461 4462 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 4463 4464 //===--------------------------------------------------------------------===// 4465 // C++ Templates [C++ 14] 4466 // 4467 void FilterAcceptableTemplateNames(LookupResult &R, 4468 bool AllowFunctionTemplates = true); 4469 bool hasAnyAcceptableTemplateNames(LookupResult &R, 4470 bool AllowFunctionTemplates = true); 4471 4472 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 4473 QualType ObjectType, bool EnteringContext, 4474 bool &MemberOfUnknownSpecialization); 4475 4476 TemplateNameKind isTemplateName(Scope *S, 4477 CXXScopeSpec &SS, 4478 bool hasTemplateKeyword, 4479 UnqualifiedId &Name, 4480 ParsedType ObjectType, 4481 bool EnteringContext, 4482 TemplateTy &Template, 4483 bool &MemberOfUnknownSpecialization); 4484 4485 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 4486 SourceLocation IILoc, 4487 Scope *S, 4488 const CXXScopeSpec *SS, 4489 TemplateTy &SuggestedTemplate, 4490 TemplateNameKind &SuggestedKind); 4491 4492 void DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 4493 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 4494 4495 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 4496 SourceLocation EllipsisLoc, 4497 SourceLocation KeyLoc, 4498 IdentifierInfo *ParamName, 4499 SourceLocation ParamNameLoc, 4500 unsigned Depth, unsigned Position, 4501 SourceLocation EqualLoc, 4502 ParsedType DefaultArg); 4503 4504 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 4505 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 4506 unsigned Depth, 4507 unsigned Position, 4508 SourceLocation EqualLoc, 4509 Expr *DefaultArg); 4510 Decl *ActOnTemplateTemplateParameter(Scope *S, 4511 SourceLocation TmpLoc, 4512 TemplateParameterList *Params, 4513 SourceLocation EllipsisLoc, 4514 IdentifierInfo *ParamName, 4515 SourceLocation ParamNameLoc, 4516 unsigned Depth, 4517 unsigned Position, 4518 SourceLocation EqualLoc, 4519 ParsedTemplateArgument DefaultArg); 4520 4521 TemplateParameterList * 4522 ActOnTemplateParameterList(unsigned Depth, 4523 SourceLocation ExportLoc, 4524 SourceLocation TemplateLoc, 4525 SourceLocation LAngleLoc, 4526 Decl **Params, unsigned NumParams, 4527 SourceLocation RAngleLoc); 4528 4529 /// \brief The context in which we are checking a template parameter 4530 /// list. 4531 enum TemplateParamListContext { 4532 TPC_ClassTemplate, 4533 TPC_FunctionTemplate, 4534 TPC_ClassTemplateMember, 4535 TPC_FriendFunctionTemplate, 4536 TPC_FriendFunctionTemplateDefinition, 4537 TPC_TypeAliasTemplate 4538 }; 4539 4540 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 4541 TemplateParameterList *OldParams, 4542 TemplateParamListContext TPC); 4543 TemplateParameterList * 4544 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 4545 SourceLocation DeclLoc, 4546 const CXXScopeSpec &SS, 4547 TemplateParameterList **ParamLists, 4548 unsigned NumParamLists, 4549 bool IsFriend, 4550 bool &IsExplicitSpecialization, 4551 bool &Invalid); 4552 4553 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 4554 SourceLocation KWLoc, CXXScopeSpec &SS, 4555 IdentifierInfo *Name, SourceLocation NameLoc, 4556 AttributeList *Attr, 4557 TemplateParameterList *TemplateParams, 4558 AccessSpecifier AS, 4559 SourceLocation ModulePrivateLoc, 4560 unsigned NumOuterTemplateParamLists, 4561 TemplateParameterList **OuterTemplateParamLists); 4562 4563 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 4564 TemplateArgumentListInfo &Out); 4565 4566 void NoteAllFoundTemplates(TemplateName Name); 4567 4568 QualType CheckTemplateIdType(TemplateName Template, 4569 SourceLocation TemplateLoc, 4570 TemplateArgumentListInfo &TemplateArgs); 4571 4572 TypeResult 4573 ActOnTemplateIdType(CXXScopeSpec &SS, SourceLocation TemplateKWLoc, 4574 TemplateTy Template, SourceLocation TemplateLoc, 4575 SourceLocation LAngleLoc, 4576 ASTTemplateArgsPtr TemplateArgs, 4577 SourceLocation RAngleLoc, 4578 bool IsCtorOrDtorName = false); 4579 4580 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 4581 /// such as \c class T::template apply<U>. 4582 /// 4583 /// \param TUK 4584 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 4585 TypeSpecifierType TagSpec, 4586 SourceLocation TagLoc, 4587 CXXScopeSpec &SS, 4588 SourceLocation TemplateKWLoc, 4589 TemplateTy TemplateD, 4590 SourceLocation TemplateLoc, 4591 SourceLocation LAngleLoc, 4592 ASTTemplateArgsPtr TemplateArgsIn, 4593 SourceLocation RAngleLoc); 4594 4595 4596 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 4597 SourceLocation TemplateKWLoc, 4598 LookupResult &R, 4599 bool RequiresADL, 4600 const TemplateArgumentListInfo *TemplateArgs); 4601 4602 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 4603 SourceLocation TemplateKWLoc, 4604 const DeclarationNameInfo &NameInfo, 4605 const TemplateArgumentListInfo *TemplateArgs); 4606 4607 TemplateNameKind ActOnDependentTemplateName(Scope *S, 4608 CXXScopeSpec &SS, 4609 SourceLocation TemplateKWLoc, 4610 UnqualifiedId &Name, 4611 ParsedType ObjectType, 4612 bool EnteringContext, 4613 TemplateTy &Template); 4614 4615 DeclResult 4616 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 4617 SourceLocation KWLoc, 4618 SourceLocation ModulePrivateLoc, 4619 CXXScopeSpec &SS, 4620 TemplateTy Template, 4621 SourceLocation TemplateNameLoc, 4622 SourceLocation LAngleLoc, 4623 ASTTemplateArgsPtr TemplateArgs, 4624 SourceLocation RAngleLoc, 4625 AttributeList *Attr, 4626 MultiTemplateParamsArg TemplateParameterLists); 4627 4628 Decl *ActOnTemplateDeclarator(Scope *S, 4629 MultiTemplateParamsArg TemplateParameterLists, 4630 Declarator &D); 4631 4632 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 4633 MultiTemplateParamsArg TemplateParameterLists, 4634 Declarator &D); 4635 4636 bool 4637 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 4638 TemplateSpecializationKind NewTSK, 4639 NamedDecl *PrevDecl, 4640 TemplateSpecializationKind PrevTSK, 4641 SourceLocation PrevPtOfInstantiation, 4642 bool &SuppressNew); 4643 4644 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 4645 const TemplateArgumentListInfo &ExplicitTemplateArgs, 4646 LookupResult &Previous); 4647 4648 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 4649 TemplateArgumentListInfo *ExplicitTemplateArgs, 4650 LookupResult &Previous); 4651 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 4652 4653 DeclResult 4654 ActOnExplicitInstantiation(Scope *S, 4655 SourceLocation ExternLoc, 4656 SourceLocation TemplateLoc, 4657 unsigned TagSpec, 4658 SourceLocation KWLoc, 4659 const CXXScopeSpec &SS, 4660 TemplateTy Template, 4661 SourceLocation TemplateNameLoc, 4662 SourceLocation LAngleLoc, 4663 ASTTemplateArgsPtr TemplateArgs, 4664 SourceLocation RAngleLoc, 4665 AttributeList *Attr); 4666 4667 DeclResult 4668 ActOnExplicitInstantiation(Scope *S, 4669 SourceLocation ExternLoc, 4670 SourceLocation TemplateLoc, 4671 unsigned TagSpec, 4672 SourceLocation KWLoc, 4673 CXXScopeSpec &SS, 4674 IdentifierInfo *Name, 4675 SourceLocation NameLoc, 4676 AttributeList *Attr); 4677 4678 DeclResult ActOnExplicitInstantiation(Scope *S, 4679 SourceLocation ExternLoc, 4680 SourceLocation TemplateLoc, 4681 Declarator &D); 4682 4683 TemplateArgumentLoc 4684 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 4685 SourceLocation TemplateLoc, 4686 SourceLocation RAngleLoc, 4687 Decl *Param, 4688 SmallVectorImpl<TemplateArgument> &Converted); 4689 4690 /// \brief Specifies the context in which a particular template 4691 /// argument is being checked. 4692 enum CheckTemplateArgumentKind { 4693 /// \brief The template argument was specified in the code or was 4694 /// instantiated with some deduced template arguments. 4695 CTAK_Specified, 4696 4697 /// \brief The template argument was deduced via template argument 4698 /// deduction. 4699 CTAK_Deduced, 4700 4701 /// \brief The template argument was deduced from an array bound 4702 /// via template argument deduction. 4703 CTAK_DeducedFromArrayBound 4704 }; 4705 4706 bool CheckTemplateArgument(NamedDecl *Param, 4707 const TemplateArgumentLoc &Arg, 4708 NamedDecl *Template, 4709 SourceLocation TemplateLoc, 4710 SourceLocation RAngleLoc, 4711 unsigned ArgumentPackIndex, 4712 SmallVectorImpl<TemplateArgument> &Converted, 4713 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4714 4715 /// \brief Check that the given template arguments can be be provided to 4716 /// the given template, converting the arguments along the way. 4717 /// 4718 /// \param Template The template to which the template arguments are being 4719 /// provided. 4720 /// 4721 /// \param TemplateLoc The location of the template name in the source. 4722 /// 4723 /// \param TemplateArgs The list of template arguments. If the template is 4724 /// a template template parameter, this function may extend the set of 4725 /// template arguments to also include substituted, defaulted template 4726 /// arguments. 4727 /// 4728 /// \param PartialTemplateArgs True if the list of template arguments is 4729 /// intentionally partial, e.g., because we're checking just the initial 4730 /// set of template arguments. 4731 /// 4732 /// \param Converted Will receive the converted, canonicalized template 4733 /// arguments. 4734 /// 4735 /// 4736 /// \param ExpansionIntoFixedList If non-NULL, will be set true to indicate 4737 /// when the template arguments contain a pack expansion that is being 4738 /// expanded into a fixed parameter list. 4739 /// 4740 /// \returns True if an error occurred, false otherwise. 4741 bool CheckTemplateArgumentList(TemplateDecl *Template, 4742 SourceLocation TemplateLoc, 4743 TemplateArgumentListInfo &TemplateArgs, 4744 bool PartialTemplateArgs, 4745 SmallVectorImpl<TemplateArgument> &Converted, 4746 bool *ExpansionIntoFixedList = 0); 4747 4748 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 4749 const TemplateArgumentLoc &Arg, 4750 SmallVectorImpl<TemplateArgument> &Converted); 4751 4752 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 4753 TypeSourceInfo *Arg); 4754 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 4755 QualType InstantiatedParamType, Expr *Arg, 4756 TemplateArgument &Converted, 4757 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4758 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 4759 const TemplateArgumentLoc &Arg); 4760 4761 ExprResult 4762 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 4763 QualType ParamType, 4764 SourceLocation Loc); 4765 ExprResult 4766 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 4767 SourceLocation Loc); 4768 4769 /// \brief Enumeration describing how template parameter lists are compared 4770 /// for equality. 4771 enum TemplateParameterListEqualKind { 4772 /// \brief We are matching the template parameter lists of two templates 4773 /// that might be redeclarations. 4774 /// 4775 /// \code 4776 /// template<typename T> struct X; 4777 /// template<typename T> struct X; 4778 /// \endcode 4779 TPL_TemplateMatch, 4780 4781 /// \brief We are matching the template parameter lists of two template 4782 /// template parameters as part of matching the template parameter lists 4783 /// of two templates that might be redeclarations. 4784 /// 4785 /// \code 4786 /// template<template<int I> class TT> struct X; 4787 /// template<template<int Value> class Other> struct X; 4788 /// \endcode 4789 TPL_TemplateTemplateParmMatch, 4790 4791 /// \brief We are matching the template parameter lists of a template 4792 /// template argument against the template parameter lists of a template 4793 /// template parameter. 4794 /// 4795 /// \code 4796 /// template<template<int Value> class Metafun> struct X; 4797 /// template<int Value> struct integer_c; 4798 /// X<integer_c> xic; 4799 /// \endcode 4800 TPL_TemplateTemplateArgumentMatch 4801 }; 4802 4803 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 4804 TemplateParameterList *Old, 4805 bool Complain, 4806 TemplateParameterListEqualKind Kind, 4807 SourceLocation TemplateArgLoc 4808 = SourceLocation()); 4809 4810 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 4811 4812 /// \brief Called when the parser has parsed a C++ typename 4813 /// specifier, e.g., "typename T::type". 4814 /// 4815 /// \param S The scope in which this typename type occurs. 4816 /// \param TypenameLoc the location of the 'typename' keyword 4817 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4818 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 4819 /// \param IdLoc the location of the identifier. 4820 TypeResult 4821 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4822 const CXXScopeSpec &SS, const IdentifierInfo &II, 4823 SourceLocation IdLoc); 4824 4825 /// \brief Called when the parser has parsed a C++ typename 4826 /// specifier that ends in a template-id, e.g., 4827 /// "typename MetaFun::template apply<T1, T2>". 4828 /// 4829 /// \param S The scope in which this typename type occurs. 4830 /// \param TypenameLoc the location of the 'typename' keyword 4831 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4832 /// \param TemplateLoc the location of the 'template' keyword, if any. 4833 /// \param TemplateName The template name. 4834 /// \param TemplateNameLoc The location of the template name. 4835 /// \param LAngleLoc The location of the opening angle bracket ('<'). 4836 /// \param TemplateArgs The template arguments. 4837 /// \param RAngleLoc The location of the closing angle bracket ('>'). 4838 TypeResult 4839 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4840 const CXXScopeSpec &SS, 4841 SourceLocation TemplateLoc, 4842 TemplateTy Template, 4843 SourceLocation TemplateNameLoc, 4844 SourceLocation LAngleLoc, 4845 ASTTemplateArgsPtr TemplateArgs, 4846 SourceLocation RAngleLoc); 4847 4848 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 4849 SourceLocation KeywordLoc, 4850 NestedNameSpecifierLoc QualifierLoc, 4851 const IdentifierInfo &II, 4852 SourceLocation IILoc); 4853 4854 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 4855 SourceLocation Loc, 4856 DeclarationName Name); 4857 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 4858 4859 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 4860 bool RebuildTemplateParamsInCurrentInstantiation( 4861 TemplateParameterList *Params); 4862 4863 std::string 4864 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4865 const TemplateArgumentList &Args); 4866 4867 std::string 4868 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4869 const TemplateArgument *Args, 4870 unsigned NumArgs); 4871 4872 //===--------------------------------------------------------------------===// 4873 // C++ Variadic Templates (C++0x [temp.variadic]) 4874 //===--------------------------------------------------------------------===// 4875 4876 /// \brief The context in which an unexpanded parameter pack is 4877 /// being diagnosed. 4878 /// 4879 /// Note that the values of this enumeration line up with the first 4880 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4881 enum UnexpandedParameterPackContext { 4882 /// \brief An arbitrary expression. 4883 UPPC_Expression = 0, 4884 4885 /// \brief The base type of a class type. 4886 UPPC_BaseType, 4887 4888 /// \brief The type of an arbitrary declaration. 4889 UPPC_DeclarationType, 4890 4891 /// \brief The type of a data member. 4892 UPPC_DataMemberType, 4893 4894 /// \brief The size of a bit-field. 4895 UPPC_BitFieldWidth, 4896 4897 /// \brief The expression in a static assertion. 4898 UPPC_StaticAssertExpression, 4899 4900 /// \brief The fixed underlying type of an enumeration. 4901 UPPC_FixedUnderlyingType, 4902 4903 /// \brief The enumerator value. 4904 UPPC_EnumeratorValue, 4905 4906 /// \brief A using declaration. 4907 UPPC_UsingDeclaration, 4908 4909 /// \brief A friend declaration. 4910 UPPC_FriendDeclaration, 4911 4912 /// \brief A declaration qualifier. 4913 UPPC_DeclarationQualifier, 4914 4915 /// \brief An initializer. 4916 UPPC_Initializer, 4917 4918 /// \brief A default argument. 4919 UPPC_DefaultArgument, 4920 4921 /// \brief The type of a non-type template parameter. 4922 UPPC_NonTypeTemplateParameterType, 4923 4924 /// \brief The type of an exception. 4925 UPPC_ExceptionType, 4926 4927 /// \brief Partial specialization. 4928 UPPC_PartialSpecialization, 4929 4930 /// \brief Microsoft __if_exists. 4931 UPPC_IfExists, 4932 4933 /// \brief Microsoft __if_not_exists. 4934 UPPC_IfNotExists 4935}; 4936 4937 /// \brief Diagnose unexpanded parameter packs. 4938 /// 4939 /// \param Loc The location at which we should emit the diagnostic. 4940 /// 4941 /// \param UPPC The context in which we are diagnosing unexpanded 4942 /// parameter packs. 4943 /// 4944 /// \param Unexpanded the set of unexpanded parameter packs. 4945 void DiagnoseUnexpandedParameterPacks(SourceLocation Loc, 4946 UnexpandedParameterPackContext UPPC, 4947 ArrayRef<UnexpandedParameterPack> Unexpanded); 4948 4949 /// \brief If the given type contains an unexpanded parameter pack, 4950 /// diagnose the error. 4951 /// 4952 /// \param Loc The source location where a diagnostc should be emitted. 4953 /// 4954 /// \param T The type that is being checked for unexpanded parameter 4955 /// packs. 4956 /// 4957 /// \returns true if an error occurred, false otherwise. 4958 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4959 UnexpandedParameterPackContext UPPC); 4960 4961 /// \brief If the given expression contains an unexpanded parameter 4962 /// pack, diagnose the error. 4963 /// 4964 /// \param E The expression that is being checked for unexpanded 4965 /// parameter packs. 4966 /// 4967 /// \returns true if an error occurred, false otherwise. 4968 bool DiagnoseUnexpandedParameterPack(Expr *E, 4969 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4970 4971 /// \brief If the given nested-name-specifier contains an unexpanded 4972 /// parameter pack, diagnose the error. 4973 /// 4974 /// \param SS The nested-name-specifier that is being checked for 4975 /// unexpanded parameter packs. 4976 /// 4977 /// \returns true if an error occurred, false otherwise. 4978 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4979 UnexpandedParameterPackContext UPPC); 4980 4981 /// \brief If the given name contains an unexpanded parameter pack, 4982 /// diagnose the error. 4983 /// 4984 /// \param NameInfo The name (with source location information) that 4985 /// is being checked for unexpanded parameter packs. 4986 /// 4987 /// \returns true if an error occurred, false otherwise. 4988 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4989 UnexpandedParameterPackContext UPPC); 4990 4991 /// \brief If the given template name contains an unexpanded parameter pack, 4992 /// diagnose the error. 4993 /// 4994 /// \param Loc The location of the template name. 4995 /// 4996 /// \param Template The template name that is being checked for unexpanded 4997 /// parameter packs. 4998 /// 4999 /// \returns true if an error occurred, false otherwise. 5000 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 5001 TemplateName Template, 5002 UnexpandedParameterPackContext UPPC); 5003 5004 /// \brief If the given template argument contains an unexpanded parameter 5005 /// pack, diagnose the error. 5006 /// 5007 /// \param Arg The template argument that is being checked for unexpanded 5008 /// parameter packs. 5009 /// 5010 /// \returns true if an error occurred, false otherwise. 5011 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 5012 UnexpandedParameterPackContext UPPC); 5013 5014 /// \brief Collect the set of unexpanded parameter packs within the given 5015 /// template argument. 5016 /// 5017 /// \param Arg The template argument that will be traversed to find 5018 /// unexpanded parameter packs. 5019 void collectUnexpandedParameterPacks(TemplateArgument Arg, 5020 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 5021 5022 /// \brief Collect the set of unexpanded parameter packs within the given 5023 /// template argument. 5024 /// 5025 /// \param Arg The template argument that will be traversed to find 5026 /// unexpanded parameter packs. 5027 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 5028 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 5029 5030 /// \brief Collect the set of unexpanded parameter packs within the given 5031 /// type. 5032 /// 5033 /// \param T The type that will be traversed to find 5034 /// unexpanded parameter packs. 5035 void collectUnexpandedParameterPacks(QualType T, 5036 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 5037 5038 /// \brief Collect the set of unexpanded parameter packs within the given 5039 /// type. 5040 /// 5041 /// \param TL The type that will be traversed to find 5042 /// unexpanded parameter packs. 5043 void collectUnexpandedParameterPacks(TypeLoc TL, 5044 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 5045 5046 /// \brief Collect the set of unexpanded parameter packs within the given 5047 /// nested-name-specifier. 5048 /// 5049 /// \param SS The nested-name-specifier that will be traversed to find 5050 /// unexpanded parameter packs. 5051 void collectUnexpandedParameterPacks(CXXScopeSpec &SS, 5052 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 5053 5054 /// \brief Collect the set of unexpanded parameter packs within the given 5055 /// name. 5056 /// 5057 /// \param NameInfo The name that will be traversed to find 5058 /// unexpanded parameter packs. 5059 void collectUnexpandedParameterPacks(const DeclarationNameInfo &NameInfo, 5060 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 5061 5062 /// \brief Invoked when parsing a template argument followed by an 5063 /// ellipsis, which creates a pack expansion. 5064 /// 5065 /// \param Arg The template argument preceding the ellipsis, which 5066 /// may already be invalid. 5067 /// 5068 /// \param EllipsisLoc The location of the ellipsis. 5069 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 5070 SourceLocation EllipsisLoc); 5071 5072 /// \brief Invoked when parsing a type followed by an ellipsis, which 5073 /// creates a pack expansion. 5074 /// 5075 /// \param Type The type preceding the ellipsis, which will become 5076 /// the pattern of the pack expansion. 5077 /// 5078 /// \param EllipsisLoc The location of the ellipsis. 5079 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 5080 5081 /// \brief Construct a pack expansion type from the pattern of the pack 5082 /// expansion. 5083 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 5084 SourceLocation EllipsisLoc, 5085 llvm::Optional<unsigned> NumExpansions); 5086 5087 /// \brief Construct a pack expansion type from the pattern of the pack 5088 /// expansion. 5089 QualType CheckPackExpansion(QualType Pattern, 5090 SourceRange PatternRange, 5091 SourceLocation EllipsisLoc, 5092 llvm::Optional<unsigned> NumExpansions); 5093 5094 /// \brief Invoked when parsing an expression followed by an ellipsis, which 5095 /// creates a pack expansion. 5096 /// 5097 /// \param Pattern The expression preceding the ellipsis, which will become 5098 /// the pattern of the pack expansion. 5099 /// 5100 /// \param EllipsisLoc The location of the ellipsis. 5101 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 5102 5103 /// \brief Invoked when parsing an expression followed by an ellipsis, which 5104 /// creates a pack expansion. 5105 /// 5106 /// \param Pattern The expression preceding the ellipsis, which will become 5107 /// the pattern of the pack expansion. 5108 /// 5109 /// \param EllipsisLoc The location of the ellipsis. 5110 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 5111 llvm::Optional<unsigned> NumExpansions); 5112 5113 /// \brief Determine whether we could expand a pack expansion with the 5114 /// given set of parameter packs into separate arguments by repeatedly 5115 /// transforming the pattern. 5116 /// 5117 /// \param EllipsisLoc The location of the ellipsis that identifies the 5118 /// pack expansion. 5119 /// 5120 /// \param PatternRange The source range that covers the entire pattern of 5121 /// the pack expansion. 5122 /// 5123 /// \param Unexpanded The set of unexpanded parameter packs within the 5124 /// pattern. 5125 /// 5126 /// \param NumUnexpanded The number of unexpanded parameter packs in 5127 /// \p Unexpanded. 5128 /// 5129 /// \param ShouldExpand Will be set to \c true if the transformer should 5130 /// expand the corresponding pack expansions into separate arguments. When 5131 /// set, \c NumExpansions must also be set. 5132 /// 5133 /// \param RetainExpansion Whether the caller should add an unexpanded 5134 /// pack expansion after all of the expanded arguments. This is used 5135 /// when extending explicitly-specified template argument packs per 5136 /// C++0x [temp.arg.explicit]p9. 5137 /// 5138 /// \param NumExpansions The number of separate arguments that will be in 5139 /// the expanded form of the corresponding pack expansion. This is both an 5140 /// input and an output parameter, which can be set by the caller if the 5141 /// number of expansions is known a priori (e.g., due to a prior substitution) 5142 /// and will be set by the callee when the number of expansions is known. 5143 /// The callee must set this value when \c ShouldExpand is \c true; it may 5144 /// set this value in other cases. 5145 /// 5146 /// \returns true if an error occurred (e.g., because the parameter packs 5147 /// are to be instantiated with arguments of different lengths), false 5148 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 5149 /// must be set. 5150 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 5151 SourceRange PatternRange, 5152 llvm::ArrayRef<UnexpandedParameterPack> Unexpanded, 5153 const MultiLevelTemplateArgumentList &TemplateArgs, 5154 bool &ShouldExpand, 5155 bool &RetainExpansion, 5156 llvm::Optional<unsigned> &NumExpansions); 5157 5158 /// \brief Determine the number of arguments in the given pack expansion 5159 /// type. 5160 /// 5161 /// This routine already assumes that the pack expansion type can be 5162 /// expanded and that the number of arguments in the expansion is 5163 /// consistent across all of the unexpanded parameter packs in its pattern. 5164 unsigned getNumArgumentsInExpansion(QualType T, 5165 const MultiLevelTemplateArgumentList &TemplateArgs); 5166 5167 /// \brief Determine whether the given declarator contains any unexpanded 5168 /// parameter packs. 5169 /// 5170 /// This routine is used by the parser to disambiguate function declarators 5171 /// with an ellipsis prior to the ')', e.g., 5172 /// 5173 /// \code 5174 /// void f(T...); 5175 /// \endcode 5176 /// 5177 /// To determine whether we have an (unnamed) function parameter pack or 5178 /// a variadic function. 5179 /// 5180 /// \returns true if the declarator contains any unexpanded parameter packs, 5181 /// false otherwise. 5182 bool containsUnexpandedParameterPacks(Declarator &D); 5183 5184 //===--------------------------------------------------------------------===// 5185 // C++ Template Argument Deduction (C++ [temp.deduct]) 5186 //===--------------------------------------------------------------------===// 5187 5188 /// \brief Describes the result of template argument deduction. 5189 /// 5190 /// The TemplateDeductionResult enumeration describes the result of 5191 /// template argument deduction, as returned from 5192 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 5193 /// structure provides additional information about the results of 5194 /// template argument deduction, e.g., the deduced template argument 5195 /// list (if successful) or the specific template parameters or 5196 /// deduced arguments that were involved in the failure. 5197 enum TemplateDeductionResult { 5198 /// \brief Template argument deduction was successful. 5199 TDK_Success = 0, 5200 /// \brief Template argument deduction exceeded the maximum template 5201 /// instantiation depth (which has already been diagnosed). 5202 TDK_InstantiationDepth, 5203 /// \brief Template argument deduction did not deduce a value 5204 /// for every template parameter. 5205 TDK_Incomplete, 5206 /// \brief Template argument deduction produced inconsistent 5207 /// deduced values for the given template parameter. 5208 TDK_Inconsistent, 5209 /// \brief Template argument deduction failed due to inconsistent 5210 /// cv-qualifiers on a template parameter type that would 5211 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 5212 /// but were given a non-const "X". 5213 TDK_Underqualified, 5214 /// \brief Substitution of the deduced template argument values 5215 /// resulted in an error. 5216 TDK_SubstitutionFailure, 5217 /// \brief Substitution of the deduced template argument values 5218 /// into a non-deduced context produced a type or value that 5219 /// produces a type that does not match the original template 5220 /// arguments provided. 5221 TDK_NonDeducedMismatch, 5222 /// \brief When performing template argument deduction for a function 5223 /// template, there were too many call arguments. 5224 TDK_TooManyArguments, 5225 /// \brief When performing template argument deduction for a function 5226 /// template, there were too few call arguments. 5227 TDK_TooFewArguments, 5228 /// \brief The explicitly-specified template arguments were not valid 5229 /// template arguments for the given template. 5230 TDK_InvalidExplicitArguments, 5231 /// \brief The arguments included an overloaded function name that could 5232 /// not be resolved to a suitable function. 5233 TDK_FailedOverloadResolution 5234 }; 5235 5236 TemplateDeductionResult 5237 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 5238 const TemplateArgumentList &TemplateArgs, 5239 sema::TemplateDeductionInfo &Info); 5240 5241 TemplateDeductionResult 5242 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 5243 TemplateArgumentListInfo &ExplicitTemplateArgs, 5244 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 5245 SmallVectorImpl<QualType> &ParamTypes, 5246 QualType *FunctionType, 5247 sema::TemplateDeductionInfo &Info); 5248 5249 /// brief A function argument from which we performed template argument 5250 // deduction for a call. 5251 struct OriginalCallArg { 5252 OriginalCallArg(QualType OriginalParamType, 5253 unsigned ArgIdx, 5254 QualType OriginalArgType) 5255 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 5256 OriginalArgType(OriginalArgType) { } 5257 5258 QualType OriginalParamType; 5259 unsigned ArgIdx; 5260 QualType OriginalArgType; 5261 }; 5262 5263 TemplateDeductionResult 5264 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 5265 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 5266 unsigned NumExplicitlySpecified, 5267 FunctionDecl *&Specialization, 5268 sema::TemplateDeductionInfo &Info, 5269 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 5270 5271 TemplateDeductionResult 5272 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 5273 TemplateArgumentListInfo *ExplicitTemplateArgs, 5274 llvm::ArrayRef<Expr *> Args, 5275 FunctionDecl *&Specialization, 5276 sema::TemplateDeductionInfo &Info); 5277 5278 TemplateDeductionResult 5279 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 5280 TemplateArgumentListInfo *ExplicitTemplateArgs, 5281 QualType ArgFunctionType, 5282 FunctionDecl *&Specialization, 5283 sema::TemplateDeductionInfo &Info); 5284 5285 TemplateDeductionResult 5286 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 5287 QualType ToType, 5288 CXXConversionDecl *&Specialization, 5289 sema::TemplateDeductionInfo &Info); 5290 5291 TemplateDeductionResult 5292 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 5293 TemplateArgumentListInfo *ExplicitTemplateArgs, 5294 FunctionDecl *&Specialization, 5295 sema::TemplateDeductionInfo &Info); 5296 5297 /// \brief Result type of DeduceAutoType. 5298 enum DeduceAutoResult { 5299 DAR_Succeeded, 5300 DAR_Failed, 5301 DAR_FailedAlreadyDiagnosed 5302 }; 5303 5304 DeduceAutoResult DeduceAutoType(TypeSourceInfo *AutoType, Expr *&Initializer, 5305 TypeSourceInfo *&Result); 5306 void DiagnoseAutoDeductionFailure(VarDecl *VDecl, Expr *Init); 5307 5308 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 5309 FunctionTemplateDecl *FT2, 5310 SourceLocation Loc, 5311 TemplatePartialOrderingContext TPOC, 5312 unsigned NumCallArguments); 5313 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 5314 UnresolvedSetIterator SEnd, 5315 TemplatePartialOrderingContext TPOC, 5316 unsigned NumCallArguments, 5317 SourceLocation Loc, 5318 const PartialDiagnostic &NoneDiag, 5319 const PartialDiagnostic &AmbigDiag, 5320 const PartialDiagnostic &CandidateDiag, 5321 bool Complain = true, 5322 QualType TargetType = QualType()); 5323 5324 ClassTemplatePartialSpecializationDecl * 5325 getMoreSpecializedPartialSpecialization( 5326 ClassTemplatePartialSpecializationDecl *PS1, 5327 ClassTemplatePartialSpecializationDecl *PS2, 5328 SourceLocation Loc); 5329 5330 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 5331 bool OnlyDeduced, 5332 unsigned Depth, 5333 llvm::SmallBitVector &Used); 5334 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 5335 llvm::SmallBitVector &Deduced) { 5336 return MarkDeducedTemplateParameters(Context, FunctionTemplate, Deduced); 5337 } 5338 static void MarkDeducedTemplateParameters(ASTContext &Ctx, 5339 FunctionTemplateDecl *FunctionTemplate, 5340 llvm::SmallBitVector &Deduced); 5341 5342 //===--------------------------------------------------------------------===// 5343 // C++ Template Instantiation 5344 // 5345 5346 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 5347 const TemplateArgumentList *Innermost = 0, 5348 bool RelativeToPrimary = false, 5349 const FunctionDecl *Pattern = 0); 5350 5351 /// \brief A template instantiation that is currently in progress. 5352 struct ActiveTemplateInstantiation { 5353 /// \brief The kind of template instantiation we are performing 5354 enum InstantiationKind { 5355 /// We are instantiating a template declaration. The entity is 5356 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 5357 TemplateInstantiation, 5358 5359 /// We are instantiating a default argument for a template 5360 /// parameter. The Entity is the template, and 5361 /// TemplateArgs/NumTemplateArguments provides the template 5362 /// arguments as specified. 5363 /// FIXME: Use a TemplateArgumentList 5364 DefaultTemplateArgumentInstantiation, 5365 5366 /// We are instantiating a default argument for a function. 5367 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 5368 /// provides the template arguments as specified. 5369 DefaultFunctionArgumentInstantiation, 5370 5371 /// We are substituting explicit template arguments provided for 5372 /// a function template. The entity is a FunctionTemplateDecl. 5373 ExplicitTemplateArgumentSubstitution, 5374 5375 /// We are substituting template argument determined as part of 5376 /// template argument deduction for either a class template 5377 /// partial specialization or a function template. The 5378 /// Entity is either a ClassTemplatePartialSpecializationDecl or 5379 /// a FunctionTemplateDecl. 5380 DeducedTemplateArgumentSubstitution, 5381 5382 /// We are substituting prior template arguments into a new 5383 /// template parameter. The template parameter itself is either a 5384 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 5385 PriorTemplateArgumentSubstitution, 5386 5387 /// We are checking the validity of a default template argument that 5388 /// has been used when naming a template-id. 5389 DefaultTemplateArgumentChecking, 5390 5391 /// We are instantiating the exception specification for a function 5392 /// template which was deferred until it was needed. 5393 ExceptionSpecInstantiation 5394 } Kind; 5395 5396 /// \brief The point of instantiation within the source code. 5397 SourceLocation PointOfInstantiation; 5398 5399 /// \brief The template (or partial specialization) in which we are 5400 /// performing the instantiation, for substitutions of prior template 5401 /// arguments. 5402 NamedDecl *Template; 5403 5404 /// \brief The entity that is being instantiated. 5405 uintptr_t Entity; 5406 5407 /// \brief The list of template arguments we are substituting, if they 5408 /// are not part of the entity. 5409 const TemplateArgument *TemplateArgs; 5410 5411 /// \brief The number of template arguments in TemplateArgs. 5412 unsigned NumTemplateArgs; 5413 5414 /// \brief The template deduction info object associated with the 5415 /// substitution or checking of explicit or deduced template arguments. 5416 sema::TemplateDeductionInfo *DeductionInfo; 5417 5418 /// \brief The source range that covers the construct that cause 5419 /// the instantiation, e.g., the template-id that causes a class 5420 /// template instantiation. 5421 SourceRange InstantiationRange; 5422 5423 ActiveTemplateInstantiation() 5424 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 5425 NumTemplateArgs(0), DeductionInfo(0) {} 5426 5427 /// \brief Determines whether this template is an actual instantiation 5428 /// that should be counted toward the maximum instantiation depth. 5429 bool isInstantiationRecord() const; 5430 5431 friend bool operator==(const ActiveTemplateInstantiation &X, 5432 const ActiveTemplateInstantiation &Y) { 5433 if (X.Kind != Y.Kind) 5434 return false; 5435 5436 if (X.Entity != Y.Entity) 5437 return false; 5438 5439 switch (X.Kind) { 5440 case TemplateInstantiation: 5441 case ExceptionSpecInstantiation: 5442 return true; 5443 5444 case PriorTemplateArgumentSubstitution: 5445 case DefaultTemplateArgumentChecking: 5446 if (X.Template != Y.Template) 5447 return false; 5448 5449 // Fall through 5450 5451 case DefaultTemplateArgumentInstantiation: 5452 case ExplicitTemplateArgumentSubstitution: 5453 case DeducedTemplateArgumentSubstitution: 5454 case DefaultFunctionArgumentInstantiation: 5455 return X.TemplateArgs == Y.TemplateArgs; 5456 5457 } 5458 5459 llvm_unreachable("Invalid InstantiationKind!"); 5460 } 5461 5462 friend bool operator!=(const ActiveTemplateInstantiation &X, 5463 const ActiveTemplateInstantiation &Y) { 5464 return !(X == Y); 5465 } 5466 }; 5467 5468 /// \brief List of active template instantiations. 5469 /// 5470 /// This vector is treated as a stack. As one template instantiation 5471 /// requires another template instantiation, additional 5472 /// instantiations are pushed onto the stack up to a 5473 /// user-configurable limit LangOptions::InstantiationDepth. 5474 SmallVector<ActiveTemplateInstantiation, 16> 5475 ActiveTemplateInstantiations; 5476 5477 /// \brief Whether we are in a SFINAE context that is not associated with 5478 /// template instantiation. 5479 /// 5480 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 5481 /// of a template instantiation or template argument deduction. 5482 bool InNonInstantiationSFINAEContext; 5483 5484 /// \brief The number of ActiveTemplateInstantiation entries in 5485 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 5486 /// therefore, should not be counted as part of the instantiation depth. 5487 unsigned NonInstantiationEntries; 5488 5489 /// \brief The last template from which a template instantiation 5490 /// error or warning was produced. 5491 /// 5492 /// This value is used to suppress printing of redundant template 5493 /// instantiation backtraces when there are multiple errors in the 5494 /// same instantiation. FIXME: Does this belong in Sema? It's tough 5495 /// to implement it anywhere else. 5496 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 5497 5498 /// \brief The current index into pack expansion arguments that will be 5499 /// used for substitution of parameter packs. 5500 /// 5501 /// The pack expansion index will be -1 to indicate that parameter packs 5502 /// should be instantiated as themselves. Otherwise, the index specifies 5503 /// which argument within the parameter pack will be used for substitution. 5504 int ArgumentPackSubstitutionIndex; 5505 5506 /// \brief RAII object used to change the argument pack substitution index 5507 /// within a \c Sema object. 5508 /// 5509 /// See \c ArgumentPackSubstitutionIndex for more information. 5510 class ArgumentPackSubstitutionIndexRAII { 5511 Sema &Self; 5512 int OldSubstitutionIndex; 5513 5514 public: 5515 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 5516 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 5517 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 5518 } 5519 5520 ~ArgumentPackSubstitutionIndexRAII() { 5521 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 5522 } 5523 }; 5524 5525 friend class ArgumentPackSubstitutionRAII; 5526 5527 /// \brief The stack of calls expression undergoing template instantiation. 5528 /// 5529 /// The top of this stack is used by a fixit instantiating unresolved 5530 /// function calls to fix the AST to match the textual change it prints. 5531 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 5532 5533 /// \brief For each declaration that involved template argument deduction, the 5534 /// set of diagnostics that were suppressed during that template argument 5535 /// deduction. 5536 /// 5537 /// FIXME: Serialize this structure to the AST file. 5538 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 5539 SuppressedDiagnostics; 5540 5541 /// \brief A stack object to be created when performing template 5542 /// instantiation. 5543 /// 5544 /// Construction of an object of type \c InstantiatingTemplate 5545 /// pushes the current instantiation onto the stack of active 5546 /// instantiations. If the size of this stack exceeds the maximum 5547 /// number of recursive template instantiations, construction 5548 /// produces an error and evaluates true. 5549 /// 5550 /// Destruction of this object will pop the named instantiation off 5551 /// the stack. 5552 struct InstantiatingTemplate { 5553 /// \brief Note that we are instantiating a class template, 5554 /// function template, or a member thereof. 5555 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5556 Decl *Entity, 5557 SourceRange InstantiationRange = SourceRange()); 5558 5559 struct ExceptionSpecification {}; 5560 /// \brief Note that we are instantiating an exception specification 5561 /// of a function template. 5562 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5563 FunctionDecl *Entity, ExceptionSpecification, 5564 SourceRange InstantiationRange = SourceRange()); 5565 5566 /// \brief Note that we are instantiating a default argument in a 5567 /// template-id. 5568 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5569 TemplateDecl *Template, 5570 const TemplateArgument *TemplateArgs, 5571 unsigned NumTemplateArgs, 5572 SourceRange InstantiationRange = SourceRange()); 5573 5574 /// \brief Note that we are instantiating a default argument in a 5575 /// template-id. 5576 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5577 FunctionTemplateDecl *FunctionTemplate, 5578 const TemplateArgument *TemplateArgs, 5579 unsigned NumTemplateArgs, 5580 ActiveTemplateInstantiation::InstantiationKind Kind, 5581 sema::TemplateDeductionInfo &DeductionInfo, 5582 SourceRange InstantiationRange = SourceRange()); 5583 5584 /// \brief Note that we are instantiating as part of template 5585 /// argument deduction for a class template partial 5586 /// specialization. 5587 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5588 ClassTemplatePartialSpecializationDecl *PartialSpec, 5589 const TemplateArgument *TemplateArgs, 5590 unsigned NumTemplateArgs, 5591 sema::TemplateDeductionInfo &DeductionInfo, 5592 SourceRange InstantiationRange = SourceRange()); 5593 5594 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5595 ParmVarDecl *Param, 5596 const TemplateArgument *TemplateArgs, 5597 unsigned NumTemplateArgs, 5598 SourceRange InstantiationRange = SourceRange()); 5599 5600 /// \brief Note that we are substituting prior template arguments into a 5601 /// non-type or template template parameter. 5602 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5603 NamedDecl *Template, 5604 NonTypeTemplateParmDecl *Param, 5605 const TemplateArgument *TemplateArgs, 5606 unsigned NumTemplateArgs, 5607 SourceRange InstantiationRange); 5608 5609 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5610 NamedDecl *Template, 5611 TemplateTemplateParmDecl *Param, 5612 const TemplateArgument *TemplateArgs, 5613 unsigned NumTemplateArgs, 5614 SourceRange InstantiationRange); 5615 5616 /// \brief Note that we are checking the default template argument 5617 /// against the template parameter for a given template-id. 5618 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5619 TemplateDecl *Template, 5620 NamedDecl *Param, 5621 const TemplateArgument *TemplateArgs, 5622 unsigned NumTemplateArgs, 5623 SourceRange InstantiationRange); 5624 5625 5626 /// \brief Note that we have finished instantiating this template. 5627 void Clear(); 5628 5629 ~InstantiatingTemplate() { Clear(); } 5630 5631 /// \brief Determines whether we have exceeded the maximum 5632 /// recursive template instantiations. 5633 operator bool() const { return Invalid; } 5634 5635 private: 5636 Sema &SemaRef; 5637 bool Invalid; 5638 bool SavedInNonInstantiationSFINAEContext; 5639 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 5640 SourceRange InstantiationRange); 5641 5642 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 5643 5644 InstantiatingTemplate& 5645 operator=(const InstantiatingTemplate&); // not implemented 5646 }; 5647 5648 void PrintInstantiationStack(); 5649 5650 /// \brief Determines whether we are currently in a context where 5651 /// template argument substitution failures are not considered 5652 /// errors. 5653 /// 5654 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 5655 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 5656 /// template-deduction context object, which can be used to capture 5657 /// diagnostics that will be suppressed. 5658 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 5659 5660 /// \brief RAII class used to determine whether SFINAE has 5661 /// trapped any errors that occur during template argument 5662 /// deduction.` 5663 class SFINAETrap { 5664 Sema &SemaRef; 5665 unsigned PrevSFINAEErrors; 5666 bool PrevInNonInstantiationSFINAEContext; 5667 bool PrevAccessCheckingSFINAE; 5668 5669 public: 5670 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 5671 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 5672 PrevInNonInstantiationSFINAEContext( 5673 SemaRef.InNonInstantiationSFINAEContext), 5674 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 5675 { 5676 if (!SemaRef.isSFINAEContext()) 5677 SemaRef.InNonInstantiationSFINAEContext = true; 5678 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 5679 } 5680 5681 ~SFINAETrap() { 5682 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 5683 SemaRef.InNonInstantiationSFINAEContext 5684 = PrevInNonInstantiationSFINAEContext; 5685 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 5686 } 5687 5688 /// \brief Determine whether any SFINAE errors have been trapped. 5689 bool hasErrorOccurred() const { 5690 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 5691 } 5692 }; 5693 5694 /// \brief The current instantiation scope used to store local 5695 /// variables. 5696 LocalInstantiationScope *CurrentInstantiationScope; 5697 5698 /// \brief The number of typos corrected by CorrectTypo. 5699 unsigned TyposCorrected; 5700 5701 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 5702 UnqualifiedTyposCorrectedMap; 5703 5704 /// \brief A cache containing the results of typo correction for unqualified 5705 /// name lookup. 5706 /// 5707 /// The string is the string that we corrected to (which may be empty, if 5708 /// there was no correction), while the boolean will be true when the 5709 /// string represents a keyword. 5710 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 5711 5712 /// \brief Worker object for performing CFG-based warnings. 5713 sema::AnalysisBasedWarnings AnalysisWarnings; 5714 5715 /// \brief An entity for which implicit template instantiation is required. 5716 /// 5717 /// The source location associated with the declaration is the first place in 5718 /// the source code where the declaration was "used". It is not necessarily 5719 /// the point of instantiation (which will be either before or after the 5720 /// namespace-scope declaration that triggered this implicit instantiation), 5721 /// However, it is the location that diagnostics should generally refer to, 5722 /// because users will need to know what code triggered the instantiation. 5723 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 5724 5725 /// \brief The queue of implicit template instantiations that are required 5726 /// but have not yet been performed. 5727 std::deque<PendingImplicitInstantiation> PendingInstantiations; 5728 5729 /// \brief The queue of implicit template instantiations that are required 5730 /// and must be performed within the current local scope. 5731 /// 5732 /// This queue is only used for member functions of local classes in 5733 /// templates, which must be instantiated in the same scope as their 5734 /// enclosing function, so that they can reference function-local 5735 /// types, static variables, enumerators, etc. 5736 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 5737 5738 void PerformPendingInstantiations(bool LocalOnly = false); 5739 5740 TypeSourceInfo *SubstType(TypeSourceInfo *T, 5741 const MultiLevelTemplateArgumentList &TemplateArgs, 5742 SourceLocation Loc, DeclarationName Entity); 5743 5744 QualType SubstType(QualType T, 5745 const MultiLevelTemplateArgumentList &TemplateArgs, 5746 SourceLocation Loc, DeclarationName Entity); 5747 5748 TypeSourceInfo *SubstType(TypeLoc TL, 5749 const MultiLevelTemplateArgumentList &TemplateArgs, 5750 SourceLocation Loc, DeclarationName Entity); 5751 5752 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 5753 const MultiLevelTemplateArgumentList &TemplateArgs, 5754 SourceLocation Loc, 5755 DeclarationName Entity, 5756 CXXRecordDecl *ThisContext, 5757 unsigned ThisTypeQuals); 5758 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 5759 const MultiLevelTemplateArgumentList &TemplateArgs, 5760 int indexAdjustment, 5761 llvm::Optional<unsigned> NumExpansions, 5762 bool ExpectParameterPack); 5763 bool SubstParmTypes(SourceLocation Loc, 5764 ParmVarDecl **Params, unsigned NumParams, 5765 const MultiLevelTemplateArgumentList &TemplateArgs, 5766 SmallVectorImpl<QualType> &ParamTypes, 5767 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 5768 ExprResult SubstExpr(Expr *E, 5769 const MultiLevelTemplateArgumentList &TemplateArgs); 5770 5771 /// \brief Substitute the given template arguments into a list of 5772 /// expressions, expanding pack expansions if required. 5773 /// 5774 /// \param Exprs The list of expressions to substitute into. 5775 /// 5776 /// \param NumExprs The number of expressions in \p Exprs. 5777 /// 5778 /// \param IsCall Whether this is some form of call, in which case 5779 /// default arguments will be dropped. 5780 /// 5781 /// \param TemplateArgs The set of template arguments to substitute. 5782 /// 5783 /// \param Outputs Will receive all of the substituted arguments. 5784 /// 5785 /// \returns true if an error occurred, false otherwise. 5786 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 5787 const MultiLevelTemplateArgumentList &TemplateArgs, 5788 SmallVectorImpl<Expr *> &Outputs); 5789 5790 StmtResult SubstStmt(Stmt *S, 5791 const MultiLevelTemplateArgumentList &TemplateArgs); 5792 5793 Decl *SubstDecl(Decl *D, DeclContext *Owner, 5794 const MultiLevelTemplateArgumentList &TemplateArgs); 5795 5796 ExprResult SubstInitializer(Expr *E, 5797 const MultiLevelTemplateArgumentList &TemplateArgs, 5798 bool CXXDirectInit); 5799 5800 bool 5801 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 5802 CXXRecordDecl *Pattern, 5803 const MultiLevelTemplateArgumentList &TemplateArgs); 5804 5805 bool 5806 InstantiateClass(SourceLocation PointOfInstantiation, 5807 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 5808 const MultiLevelTemplateArgumentList &TemplateArgs, 5809 TemplateSpecializationKind TSK, 5810 bool Complain = true); 5811 5812 bool InstantiateEnum(SourceLocation PointOfInstantiation, 5813 EnumDecl *Instantiation, EnumDecl *Pattern, 5814 const MultiLevelTemplateArgumentList &TemplateArgs, 5815 TemplateSpecializationKind TSK); 5816 5817 struct LateInstantiatedAttribute { 5818 const Attr *TmplAttr; 5819 LocalInstantiationScope *Scope; 5820 Decl *NewDecl; 5821 5822 LateInstantiatedAttribute(const Attr *A, LocalInstantiationScope *S, 5823 Decl *D) 5824 : TmplAttr(A), Scope(S), NewDecl(D) 5825 { } 5826 }; 5827 typedef SmallVector<LateInstantiatedAttribute, 16> LateInstantiatedAttrVec; 5828 5829 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 5830 const Decl *Pattern, Decl *Inst, 5831 LateInstantiatedAttrVec *LateAttrs = 0, 5832 LocalInstantiationScope *OuterMostScope = 0); 5833 5834 bool 5835 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 5836 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5837 TemplateSpecializationKind TSK, 5838 bool Complain = true); 5839 5840 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 5841 CXXRecordDecl *Instantiation, 5842 const MultiLevelTemplateArgumentList &TemplateArgs, 5843 TemplateSpecializationKind TSK); 5844 5845 void InstantiateClassTemplateSpecializationMembers( 5846 SourceLocation PointOfInstantiation, 5847 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5848 TemplateSpecializationKind TSK); 5849 5850 NestedNameSpecifierLoc 5851 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 5852 const MultiLevelTemplateArgumentList &TemplateArgs); 5853 5854 DeclarationNameInfo 5855 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 5856 const MultiLevelTemplateArgumentList &TemplateArgs); 5857 TemplateName 5858 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 5859 SourceLocation Loc, 5860 const MultiLevelTemplateArgumentList &TemplateArgs); 5861 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 5862 TemplateArgumentListInfo &Result, 5863 const MultiLevelTemplateArgumentList &TemplateArgs); 5864 5865 void InstantiateExceptionSpec(SourceLocation PointOfInstantiation, 5866 FunctionDecl *Function); 5867 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 5868 FunctionDecl *Function, 5869 bool Recursive = false, 5870 bool DefinitionRequired = false); 5871 void InstantiateStaticDataMemberDefinition( 5872 SourceLocation PointOfInstantiation, 5873 VarDecl *Var, 5874 bool Recursive = false, 5875 bool DefinitionRequired = false); 5876 5877 void InstantiateMemInitializers(CXXConstructorDecl *New, 5878 const CXXConstructorDecl *Tmpl, 5879 const MultiLevelTemplateArgumentList &TemplateArgs); 5880 5881 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 5882 const MultiLevelTemplateArgumentList &TemplateArgs); 5883 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 5884 const MultiLevelTemplateArgumentList &TemplateArgs); 5885 5886 // Objective-C declarations. 5887 enum ObjCContainerKind { 5888 OCK_None = -1, 5889 OCK_Interface = 0, 5890 OCK_Protocol, 5891 OCK_Category, 5892 OCK_ClassExtension, 5893 OCK_Implementation, 5894 OCK_CategoryImplementation 5895 }; 5896 ObjCContainerKind getObjCContainerKind() const; 5897 5898 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 5899 IdentifierInfo *ClassName, 5900 SourceLocation ClassLoc, 5901 IdentifierInfo *SuperName, 5902 SourceLocation SuperLoc, 5903 Decl * const *ProtoRefs, 5904 unsigned NumProtoRefs, 5905 const SourceLocation *ProtoLocs, 5906 SourceLocation EndProtoLoc, 5907 AttributeList *AttrList); 5908 5909 Decl *ActOnCompatiblityAlias( 5910 SourceLocation AtCompatibilityAliasLoc, 5911 IdentifierInfo *AliasName, SourceLocation AliasLocation, 5912 IdentifierInfo *ClassName, SourceLocation ClassLocation); 5913 5914 bool CheckForwardProtocolDeclarationForCircularDependency( 5915 IdentifierInfo *PName, 5916 SourceLocation &PLoc, SourceLocation PrevLoc, 5917 const ObjCList<ObjCProtocolDecl> &PList); 5918 5919 Decl *ActOnStartProtocolInterface( 5920 SourceLocation AtProtoInterfaceLoc, 5921 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 5922 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 5923 const SourceLocation *ProtoLocs, 5924 SourceLocation EndProtoLoc, 5925 AttributeList *AttrList); 5926 5927 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 5928 IdentifierInfo *ClassName, 5929 SourceLocation ClassLoc, 5930 IdentifierInfo *CategoryName, 5931 SourceLocation CategoryLoc, 5932 Decl * const *ProtoRefs, 5933 unsigned NumProtoRefs, 5934 const SourceLocation *ProtoLocs, 5935 SourceLocation EndProtoLoc); 5936 5937 Decl *ActOnStartClassImplementation( 5938 SourceLocation AtClassImplLoc, 5939 IdentifierInfo *ClassName, SourceLocation ClassLoc, 5940 IdentifierInfo *SuperClassname, 5941 SourceLocation SuperClassLoc); 5942 5943 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 5944 IdentifierInfo *ClassName, 5945 SourceLocation ClassLoc, 5946 IdentifierInfo *CatName, 5947 SourceLocation CatLoc); 5948 5949 DeclGroupPtrTy ActOnFinishObjCImplementation(Decl *ObjCImpDecl, 5950 ArrayRef<Decl *> Decls); 5951 5952 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc, 5953 IdentifierInfo **IdentList, 5954 SourceLocation *IdentLocs, 5955 unsigned NumElts); 5956 5957 DeclGroupPtrTy ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 5958 const IdentifierLocPair *IdentList, 5959 unsigned NumElts, 5960 AttributeList *attrList); 5961 5962 void FindProtocolDeclaration(bool WarnOnDeclarations, 5963 const IdentifierLocPair *ProtocolId, 5964 unsigned NumProtocols, 5965 SmallVectorImpl<Decl *> &Protocols); 5966 5967 /// Ensure attributes are consistent with type. 5968 /// \param [in, out] Attributes The attributes to check; they will 5969 /// be modified to be consistent with \arg PropertyTy. 5970 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5971 SourceLocation Loc, 5972 unsigned &Attributes); 5973 5974 /// Process the specified property declaration and create decls for the 5975 /// setters and getters as needed. 5976 /// \param property The property declaration being processed 5977 /// \param DC The semantic container for the property 5978 /// \param redeclaredProperty Declaration for property if redeclared 5979 /// in class extension. 5980 /// \param lexicalDC Container for redeclaredProperty. 5981 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5982 ObjCContainerDecl *DC, 5983 ObjCPropertyDecl *redeclaredProperty = 0, 5984 ObjCContainerDecl *lexicalDC = 0); 5985 5986 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5987 ObjCPropertyDecl *SuperProperty, 5988 const IdentifierInfo *Name); 5989 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5990 5991 5992 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5993 5994 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5995 ObjCInterfaceDecl *ID); 5996 5997 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5998 ObjCProtocolDecl *PDecl); 5999 6000 Decl *ActOnAtEnd(Scope *S, SourceRange AtEnd, 6001 Decl **allMethods = 0, unsigned allNum = 0, 6002 Decl **allProperties = 0, unsigned pNum = 0, 6003 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 6004 6005 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 6006 SourceLocation LParenLoc, 6007 FieldDeclarator &FD, ObjCDeclSpec &ODS, 6008 Selector GetterSel, Selector SetterSel, 6009 bool *OverridingProperty, 6010 tok::ObjCKeywordKind MethodImplKind, 6011 DeclContext *lexicalDC = 0); 6012 6013 Decl *ActOnPropertyImplDecl(Scope *S, 6014 SourceLocation AtLoc, 6015 SourceLocation PropertyLoc, 6016 bool ImplKind, 6017 IdentifierInfo *PropertyId, 6018 IdentifierInfo *PropertyIvar, 6019 SourceLocation PropertyIvarLoc); 6020 6021 enum ObjCSpecialMethodKind { 6022 OSMK_None, 6023 OSMK_Alloc, 6024 OSMK_New, 6025 OSMK_Copy, 6026 OSMK_RetainingInit, 6027 OSMK_NonRetainingInit 6028 }; 6029 6030 struct ObjCArgInfo { 6031 IdentifierInfo *Name; 6032 SourceLocation NameLoc; 6033 // The Type is null if no type was specified, and the DeclSpec is invalid 6034 // in this case. 6035 ParsedType Type; 6036 ObjCDeclSpec DeclSpec; 6037 6038 /// ArgAttrs - Attribute list for this argument. 6039 AttributeList *ArgAttrs; 6040 }; 6041 6042 Decl *ActOnMethodDeclaration( 6043 Scope *S, 6044 SourceLocation BeginLoc, // location of the + or -. 6045 SourceLocation EndLoc, // location of the ; or {. 6046 tok::TokenKind MethodType, 6047 ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 6048 ArrayRef<SourceLocation> SelectorLocs, Selector Sel, 6049 // optional arguments. The number of types/arguments is obtained 6050 // from the Sel.getNumArgs(). 6051 ObjCArgInfo *ArgInfo, 6052 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 6053 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 6054 bool isVariadic, bool MethodDefinition); 6055 6056 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 6057 // Will search "local" class/category implementations for a method decl. 6058 // Will also search in class's root looking for instance method. 6059 // Returns 0 if no method is found. 6060 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 6061 ObjCInterfaceDecl *CDecl); 6062 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 6063 ObjCInterfaceDecl *ClassDecl); 6064 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 6065 const ObjCObjectPointerType *OPT, 6066 bool IsInstance); 6067 ObjCMethodDecl *LookupMethodInObjectType(Selector Sel, QualType Ty, 6068 bool IsInstance); 6069 6070 bool inferObjCARCLifetime(ValueDecl *decl); 6071 6072 ExprResult 6073 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 6074 Expr *BaseExpr, 6075 SourceLocation OpLoc, 6076 DeclarationName MemberName, 6077 SourceLocation MemberLoc, 6078 SourceLocation SuperLoc, QualType SuperType, 6079 bool Super); 6080 6081 ExprResult 6082 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 6083 IdentifierInfo &propertyName, 6084 SourceLocation receiverNameLoc, 6085 SourceLocation propertyNameLoc); 6086 6087 ObjCMethodDecl *tryCaptureObjCSelf(SourceLocation Loc); 6088 6089 /// \brief Describes the kind of message expression indicated by a message 6090 /// send that starts with an identifier. 6091 enum ObjCMessageKind { 6092 /// \brief The message is sent to 'super'. 6093 ObjCSuperMessage, 6094 /// \brief The message is an instance message. 6095 ObjCInstanceMessage, 6096 /// \brief The message is a class message, and the identifier is a type 6097 /// name. 6098 ObjCClassMessage 6099 }; 6100 6101 ObjCMessageKind getObjCMessageKind(Scope *S, 6102 IdentifierInfo *Name, 6103 SourceLocation NameLoc, 6104 bool IsSuper, 6105 bool HasTrailingDot, 6106 ParsedType &ReceiverType); 6107 6108 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 6109 Selector Sel, 6110 SourceLocation LBracLoc, 6111 ArrayRef<SourceLocation> SelectorLocs, 6112 SourceLocation RBracLoc, 6113 MultiExprArg Args); 6114 6115 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 6116 QualType ReceiverType, 6117 SourceLocation SuperLoc, 6118 Selector Sel, 6119 ObjCMethodDecl *Method, 6120 SourceLocation LBracLoc, 6121 ArrayRef<SourceLocation> SelectorLocs, 6122 SourceLocation RBracLoc, 6123 MultiExprArg Args, 6124 bool isImplicit = false); 6125 6126 ExprResult BuildClassMessageImplicit(QualType ReceiverType, 6127 bool isSuperReceiver, 6128 SourceLocation Loc, 6129 Selector Sel, 6130 ObjCMethodDecl *Method, 6131 MultiExprArg Args); 6132 6133 ExprResult ActOnClassMessage(Scope *S, 6134 ParsedType Receiver, 6135 Selector Sel, 6136 SourceLocation LBracLoc, 6137 ArrayRef<SourceLocation> SelectorLocs, 6138 SourceLocation RBracLoc, 6139 MultiExprArg Args); 6140 6141 ExprResult BuildInstanceMessage(Expr *Receiver, 6142 QualType ReceiverType, 6143 SourceLocation SuperLoc, 6144 Selector Sel, 6145 ObjCMethodDecl *Method, 6146 SourceLocation LBracLoc, 6147 ArrayRef<SourceLocation> SelectorLocs, 6148 SourceLocation RBracLoc, 6149 MultiExprArg Args, 6150 bool isImplicit = false); 6151 6152 ExprResult BuildInstanceMessageImplicit(Expr *Receiver, 6153 QualType ReceiverType, 6154 SourceLocation Loc, 6155 Selector Sel, 6156 ObjCMethodDecl *Method, 6157 MultiExprArg Args); 6158 6159 ExprResult ActOnInstanceMessage(Scope *S, 6160 Expr *Receiver, 6161 Selector Sel, 6162 SourceLocation LBracLoc, 6163 ArrayRef<SourceLocation> SelectorLocs, 6164 SourceLocation RBracLoc, 6165 MultiExprArg Args); 6166 6167 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 6168 ObjCBridgeCastKind Kind, 6169 SourceLocation BridgeKeywordLoc, 6170 TypeSourceInfo *TSInfo, 6171 Expr *SubExpr); 6172 6173 ExprResult ActOnObjCBridgedCast(Scope *S, 6174 SourceLocation LParenLoc, 6175 ObjCBridgeCastKind Kind, 6176 SourceLocation BridgeKeywordLoc, 6177 ParsedType Type, 6178 SourceLocation RParenLoc, 6179 Expr *SubExpr); 6180 6181 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 6182 6183 /// \brief Check whether the given new method is a valid override of the 6184 /// given overridden method, and set any properties that should be inherited. 6185 void CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 6186 const ObjCMethodDecl *Overridden, 6187 bool IsImplementation); 6188 6189 /// \brief Check whether the given method overrides any methods in its class, 6190 /// calling \c CheckObjCMethodOverride for each overridden method. 6191 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 6192 6193 enum PragmaOptionsAlignKind { 6194 POAK_Native, // #pragma options align=native 6195 POAK_Natural, // #pragma options align=natural 6196 POAK_Packed, // #pragma options align=packed 6197 POAK_Power, // #pragma options align=power 6198 POAK_Mac68k, // #pragma options align=mac68k 6199 POAK_Reset // #pragma options align=reset 6200 }; 6201 6202 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 6203 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 6204 SourceLocation PragmaLoc, 6205 SourceLocation KindLoc); 6206 6207 enum PragmaPackKind { 6208 PPK_Default, // #pragma pack([n]) 6209 PPK_Show, // #pragma pack(show), only supported by MSVC. 6210 PPK_Push, // #pragma pack(push, [identifier], [n]) 6211 PPK_Pop // #pragma pack(pop, [identifier], [n]) 6212 }; 6213 6214 enum PragmaMSStructKind { 6215 PMSST_OFF, // #pragms ms_struct off 6216 PMSST_ON // #pragms ms_struct on 6217 }; 6218 6219 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 6220 void ActOnPragmaPack(PragmaPackKind Kind, 6221 IdentifierInfo *Name, 6222 Expr *Alignment, 6223 SourceLocation PragmaLoc, 6224 SourceLocation LParenLoc, 6225 SourceLocation RParenLoc); 6226 6227 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 6228 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 6229 6230 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 6231 void ActOnPragmaUnused(const Token &Identifier, 6232 Scope *curScope, 6233 SourceLocation PragmaLoc); 6234 6235 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 6236 void ActOnPragmaVisibility(const IdentifierInfo* VisType, 6237 SourceLocation PragmaLoc); 6238 6239 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II, 6240 SourceLocation Loc); 6241 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 6242 6243 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 6244 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 6245 SourceLocation PragmaLoc, 6246 SourceLocation WeakNameLoc); 6247 6248 /// ActOnPragmaRedefineExtname - Called on well formed 6249 /// #pragma redefine_extname oldname newname. 6250 void ActOnPragmaRedefineExtname(IdentifierInfo* WeakName, 6251 IdentifierInfo* AliasName, 6252 SourceLocation PragmaLoc, 6253 SourceLocation WeakNameLoc, 6254 SourceLocation AliasNameLoc); 6255 6256 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 6257 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 6258 IdentifierInfo* AliasName, 6259 SourceLocation PragmaLoc, 6260 SourceLocation WeakNameLoc, 6261 SourceLocation AliasNameLoc); 6262 6263 /// ActOnPragmaFPContract - Called on well formed 6264 /// #pragma {STDC,OPENCL} FP_CONTRACT 6265 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 6266 6267 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 6268 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 6269 void AddAlignmentAttributesForRecord(RecordDecl *RD); 6270 6271 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 6272 void AddMsStructLayoutForRecord(RecordDecl *RD); 6273 6274 /// FreePackedContext - Deallocate and null out PackContext. 6275 void FreePackedContext(); 6276 6277 /// PushNamespaceVisibilityAttr - Note that we've entered a 6278 /// namespace with a visibility attribute. 6279 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr, 6280 SourceLocation Loc); 6281 6282 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 6283 /// add an appropriate visibility attribute. 6284 void AddPushedVisibilityAttribute(Decl *RD); 6285 6286 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 6287 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 6288 void PopPragmaVisibility(bool IsNamespaceEnd, SourceLocation EndLoc); 6289 6290 /// FreeVisContext - Deallocate and null out VisContext. 6291 void FreeVisContext(); 6292 6293 /// AddCFAuditedAttribute - Check whether we're currently within 6294 /// '#pragma clang arc_cf_code_audited' and, if so, consider adding 6295 /// the appropriate attribute. 6296 void AddCFAuditedAttribute(Decl *D); 6297 6298 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 6299 void AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E); 6300 void AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *T); 6301 6302 /// \brief The kind of conversion being performed. 6303 enum CheckedConversionKind { 6304 /// \brief An implicit conversion. 6305 CCK_ImplicitConversion, 6306 /// \brief A C-style cast. 6307 CCK_CStyleCast, 6308 /// \brief A functional-style cast. 6309 CCK_FunctionalCast, 6310 /// \brief A cast other than a C-style cast. 6311 CCK_OtherCast 6312 }; 6313 6314 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 6315 /// cast. If there is already an implicit cast, merge into the existing one. 6316 /// If isLvalue, the result of the cast is an lvalue. 6317 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 6318 ExprValueKind VK = VK_RValue, 6319 const CXXCastPath *BasePath = 0, 6320 CheckedConversionKind CCK 6321 = CCK_ImplicitConversion); 6322 6323 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 6324 /// to the conversion from scalar type ScalarTy to the Boolean type. 6325 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 6326 6327 /// IgnoredValueConversions - Given that an expression's result is 6328 /// syntactically ignored, perform any conversions that are 6329 /// required. 6330 ExprResult IgnoredValueConversions(Expr *E); 6331 6332 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 6333 // functions and arrays to their respective pointers (C99 6.3.2.1). 6334 ExprResult UsualUnaryConversions(Expr *E); 6335 6336 // DefaultFunctionArrayConversion - converts functions and arrays 6337 // to their respective pointers (C99 6.3.2.1). 6338 ExprResult DefaultFunctionArrayConversion(Expr *E); 6339 6340 // DefaultFunctionArrayLvalueConversion - converts functions and 6341 // arrays to their respective pointers and performs the 6342 // lvalue-to-rvalue conversion. 6343 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 6344 6345 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 6346 // the operand. This is DefaultFunctionArrayLvalueConversion, 6347 // except that it assumes the operand isn't of function or array 6348 // type. 6349 ExprResult DefaultLvalueConversion(Expr *E); 6350 6351 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 6352 // do not have a prototype. Integer promotions are performed on each 6353 // argument, and arguments that have type float are promoted to double. 6354 ExprResult DefaultArgumentPromotion(Expr *E); 6355 6356 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 6357 enum VariadicCallType { 6358 VariadicFunction, 6359 VariadicBlock, 6360 VariadicMethod, 6361 VariadicConstructor, 6362 VariadicDoesNotApply 6363 }; 6364 6365 /// GatherArgumentsForCall - Collector argument expressions for various 6366 /// form of call prototypes. 6367 bool GatherArgumentsForCall(SourceLocation CallLoc, 6368 FunctionDecl *FDecl, 6369 const FunctionProtoType *Proto, 6370 unsigned FirstProtoArg, 6371 Expr **Args, unsigned NumArgs, 6372 SmallVector<Expr *, 8> &AllArgs, 6373 VariadicCallType CallType = VariadicDoesNotApply, 6374 bool AllowExplicit = false); 6375 6376 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 6377 // will warn if the resulting type is not a POD type. 6378 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 6379 FunctionDecl *FDecl); 6380 6381 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 6382 // operands and then handles various conversions that are common to binary 6383 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 6384 // routine returns the first non-arithmetic type found. The client is 6385 // responsible for emitting appropriate error diagnostics. 6386 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS, 6387 bool IsCompAssign = false); 6388 6389 /// AssignConvertType - All of the 'assignment' semantic checks return this 6390 /// enum to indicate whether the assignment was allowed. These checks are 6391 /// done for simple assignments, as well as initialization, return from 6392 /// function, argument passing, etc. The query is phrased in terms of a 6393 /// source and destination type. 6394 enum AssignConvertType { 6395 /// Compatible - the types are compatible according to the standard. 6396 Compatible, 6397 6398 /// PointerToInt - The assignment converts a pointer to an int, which we 6399 /// accept as an extension. 6400 PointerToInt, 6401 6402 /// IntToPointer - The assignment converts an int to a pointer, which we 6403 /// accept as an extension. 6404 IntToPointer, 6405 6406 /// FunctionVoidPointer - The assignment is between a function pointer and 6407 /// void*, which the standard doesn't allow, but we accept as an extension. 6408 FunctionVoidPointer, 6409 6410 /// IncompatiblePointer - The assignment is between two pointers types that 6411 /// are not compatible, but we accept them as an extension. 6412 IncompatiblePointer, 6413 6414 /// IncompatiblePointer - The assignment is between two pointers types which 6415 /// point to integers which have a different sign, but are otherwise 6416 /// identical. This is a subset of the above, but broken out because it's by 6417 /// far the most common case of incompatible pointers. 6418 IncompatiblePointerSign, 6419 6420 /// CompatiblePointerDiscardsQualifiers - The assignment discards 6421 /// c/v/r qualifiers, which we accept as an extension. 6422 CompatiblePointerDiscardsQualifiers, 6423 6424 /// IncompatiblePointerDiscardsQualifiers - The assignment 6425 /// discards qualifiers that we don't permit to be discarded, 6426 /// like address spaces. 6427 IncompatiblePointerDiscardsQualifiers, 6428 6429 /// IncompatibleNestedPointerQualifiers - The assignment is between two 6430 /// nested pointer types, and the qualifiers other than the first two 6431 /// levels differ e.g. char ** -> const char **, but we accept them as an 6432 /// extension. 6433 IncompatibleNestedPointerQualifiers, 6434 6435 /// IncompatibleVectors - The assignment is between two vector types that 6436 /// have the same size, which we accept as an extension. 6437 IncompatibleVectors, 6438 6439 /// IntToBlockPointer - The assignment converts an int to a block 6440 /// pointer. We disallow this. 6441 IntToBlockPointer, 6442 6443 /// IncompatibleBlockPointer - The assignment is between two block 6444 /// pointers types that are not compatible. 6445 IncompatibleBlockPointer, 6446 6447 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 6448 /// id type and something else (that is incompatible with it). For example, 6449 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 6450 IncompatibleObjCQualifiedId, 6451 6452 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 6453 /// object with __weak qualifier. 6454 IncompatibleObjCWeakRef, 6455 6456 /// Incompatible - We reject this conversion outright, it is invalid to 6457 /// represent it in the AST. 6458 Incompatible 6459 }; 6460 6461 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 6462 /// assignment conversion type specified by ConvTy. This returns true if the 6463 /// conversion was invalid or false if the conversion was accepted. 6464 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 6465 SourceLocation Loc, 6466 QualType DstType, QualType SrcType, 6467 Expr *SrcExpr, AssignmentAction Action, 6468 bool *Complained = 0); 6469 6470 /// CheckAssignmentConstraints - Perform type checking for assignment, 6471 /// argument passing, variable initialization, and function return values. 6472 /// C99 6.5.16. 6473 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 6474 QualType LHSType, 6475 QualType RHSType); 6476 6477 /// Check assignment constraints and prepare for a conversion of the 6478 /// RHS to the LHS type. 6479 AssignConvertType CheckAssignmentConstraints(QualType LHSType, 6480 ExprResult &RHS, 6481 CastKind &Kind); 6482 6483 // CheckSingleAssignmentConstraints - Currently used by 6484 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 6485 // this routine performs the default function/array converions. 6486 AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType, 6487 ExprResult &RHS, 6488 bool Diagnose = true); 6489 6490 // \brief If the lhs type is a transparent union, check whether we 6491 // can initialize the transparent union with the given expression. 6492 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType, 6493 ExprResult &RHS); 6494 6495 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 6496 6497 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 6498 6499 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6500 AssignmentAction Action, 6501 bool AllowExplicit = false); 6502 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6503 AssignmentAction Action, 6504 bool AllowExplicit, 6505 ImplicitConversionSequence& ICS); 6506 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6507 const ImplicitConversionSequence& ICS, 6508 AssignmentAction Action, 6509 CheckedConversionKind CCK 6510 = CCK_ImplicitConversion); 6511 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6512 const StandardConversionSequence& SCS, 6513 AssignmentAction Action, 6514 CheckedConversionKind CCK); 6515 6516 /// the following "Check" methods will return a valid/converted QualType 6517 /// or a null QualType (indicating an error diagnostic was issued). 6518 6519 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 6520 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS, 6521 ExprResult &RHS); 6522 QualType CheckPointerToMemberOperands( // C++ 5.5 6523 ExprResult &LHS, ExprResult &RHS, ExprValueKind &VK, 6524 SourceLocation OpLoc, bool isIndirect); 6525 QualType CheckMultiplyDivideOperands( // C99 6.5.5 6526 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign, 6527 bool IsDivide); 6528 QualType CheckRemainderOperands( // C99 6.5.5 6529 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6530 bool IsCompAssign = false); 6531 QualType CheckAdditionOperands( // C99 6.5.6 6532 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 6533 QualType* CompLHSTy = 0); 6534 QualType CheckSubtractionOperands( // C99 6.5.6 6535 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6536 QualType* CompLHSTy = 0); 6537 QualType CheckShiftOperands( // C99 6.5.7 6538 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 6539 bool IsCompAssign = false); 6540 QualType CheckCompareOperands( // C99 6.5.8/9 6541 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned OpaqueOpc, 6542 bool isRelational); 6543 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 6544 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6545 bool IsCompAssign = false); 6546 QualType CheckLogicalOperands( // C99 6.5.[13,14] 6547 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc); 6548 // CheckAssignmentOperands is used for both simple and compound assignment. 6549 // For simple assignment, pass both expressions and a null converted type. 6550 // For compound assignment, pass both expressions and the converted type. 6551 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 6552 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType); 6553 6554 ExprResult checkPseudoObjectIncDec(Scope *S, SourceLocation OpLoc, 6555 UnaryOperatorKind Opcode, Expr *Op); 6556 ExprResult checkPseudoObjectAssignment(Scope *S, SourceLocation OpLoc, 6557 BinaryOperatorKind Opcode, 6558 Expr *LHS, Expr *RHS); 6559 ExprResult checkPseudoObjectRValue(Expr *E); 6560 Expr *recreateSyntacticForm(PseudoObjectExpr *E); 6561 6562 QualType CheckConditionalOperands( // C99 6.5.15 6563 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS, 6564 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc); 6565 QualType CXXCheckConditionalOperands( // C++ 5.16 6566 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 6567 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 6568 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 6569 bool *NonStandardCompositeType = 0); 6570 QualType FindCompositePointerType(SourceLocation Loc, 6571 ExprResult &E1, ExprResult &E2, 6572 bool *NonStandardCompositeType = 0) { 6573 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 6574 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, 6575 NonStandardCompositeType); 6576 E1 = Owned(E1Tmp); 6577 E2 = Owned(E2Tmp); 6578 return Composite; 6579 } 6580 6581 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 6582 SourceLocation QuestionLoc); 6583 6584 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr, 6585 SourceLocation QuestionLoc); 6586 6587 /// type checking for vector binary operators. 6588 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS, 6589 SourceLocation Loc, bool IsCompAssign); 6590 QualType GetSignedVectorType(QualType V); 6591 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS, 6592 SourceLocation Loc, bool isRelational); 6593 QualType CheckVectorLogicalOperands(ExprResult &LHS, ExprResult &RHS, 6594 SourceLocation Loc); 6595 6596 /// type checking declaration initializers (C99 6.7.8) 6597 bool CheckForConstantInitializer(Expr *e, QualType t); 6598 6599 // type checking C++ declaration initializers (C++ [dcl.init]). 6600 6601 /// ReferenceCompareResult - Expresses the result of comparing two 6602 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 6603 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 6604 enum ReferenceCompareResult { 6605 /// Ref_Incompatible - The two types are incompatible, so direct 6606 /// reference binding is not possible. 6607 Ref_Incompatible = 0, 6608 /// Ref_Related - The two types are reference-related, which means 6609 /// that their unqualified forms (T1 and T2) are either the same 6610 /// or T1 is a base class of T2. 6611 Ref_Related, 6612 /// Ref_Compatible_With_Added_Qualification - The two types are 6613 /// reference-compatible with added qualification, meaning that 6614 /// they are reference-compatible and the qualifiers on T1 (cv1) 6615 /// are greater than the qualifiers on T2 (cv2). 6616 Ref_Compatible_With_Added_Qualification, 6617 /// Ref_Compatible - The two types are reference-compatible and 6618 /// have equivalent qualifiers (cv1 == cv2). 6619 Ref_Compatible 6620 }; 6621 6622 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 6623 QualType T1, QualType T2, 6624 bool &DerivedToBase, 6625 bool &ObjCConversion, 6626 bool &ObjCLifetimeConversion); 6627 6628 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType, 6629 Expr *CastExpr, CastKind &CastKind, 6630 ExprValueKind &VK, CXXCastPath &Path); 6631 6632 /// \brief Force an expression with unknown-type to an expression of the 6633 /// given type. 6634 ExprResult forceUnknownAnyToType(Expr *E, QualType ToType); 6635 6636 // CheckVectorCast - check type constraints for vectors. 6637 // Since vectors are an extension, there are no C standard reference for this. 6638 // We allow casting between vectors and integer datatypes of the same size. 6639 // returns true if the cast is invalid 6640 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 6641 CastKind &Kind); 6642 6643 // CheckExtVectorCast - check type constraints for extended vectors. 6644 // Since vectors are an extension, there are no C standard reference for this. 6645 // We allow casting between vectors and integer datatypes of the same size, 6646 // or vectors and the element type of that vector. 6647 // returns the cast expr 6648 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr, 6649 CastKind &Kind); 6650 6651 ExprResult BuildCXXFunctionalCastExpr(TypeSourceInfo *TInfo, 6652 SourceLocation LParenLoc, 6653 Expr *CastExpr, 6654 SourceLocation RParenLoc); 6655 6656 enum ARCConversionResult { ACR_okay, ACR_unbridged }; 6657 6658 /// \brief Checks for invalid conversions and casts between 6659 /// retainable pointers and other pointer kinds. 6660 ARCConversionResult CheckObjCARCConversion(SourceRange castRange, 6661 QualType castType, Expr *&op, 6662 CheckedConversionKind CCK); 6663 6664 Expr *stripARCUnbridgedCast(Expr *e); 6665 void diagnoseARCUnbridgedCast(Expr *e); 6666 6667 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 6668 QualType ExprType); 6669 6670 /// checkRetainCycles - Check whether an Objective-C message send 6671 /// might create an obvious retain cycle. 6672 void checkRetainCycles(ObjCMessageExpr *msg); 6673 void checkRetainCycles(Expr *receiver, Expr *argument); 6674 6675 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 6676 /// to weak/__unsafe_unretained type. 6677 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 6678 6679 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 6680 /// to weak/__unsafe_unretained expression. 6681 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 6682 6683 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 6684 /// \param Method - May be null. 6685 /// \param [out] ReturnType - The return type of the send. 6686 /// \return true iff there were any incompatible types. 6687 bool CheckMessageArgumentTypes(QualType ReceiverType, 6688 Expr **Args, unsigned NumArgs, Selector Sel, 6689 ObjCMethodDecl *Method, bool isClassMessage, 6690 bool isSuperMessage, 6691 SourceLocation lbrac, SourceLocation rbrac, 6692 QualType &ReturnType, ExprValueKind &VK); 6693 6694 /// \brief Determine the result of a message send expression based on 6695 /// the type of the receiver, the method expected to receive the message, 6696 /// and the form of the message send. 6697 QualType getMessageSendResultType(QualType ReceiverType, 6698 ObjCMethodDecl *Method, 6699 bool isClassMessage, bool isSuperMessage); 6700 6701 /// \brief If the given expression involves a message send to a method 6702 /// with a related result type, emit a note describing what happened. 6703 void EmitRelatedResultTypeNote(const Expr *E); 6704 6705 /// CheckBooleanCondition - Diagnose problems involving the use of 6706 /// the given expression as a boolean condition (e.g. in an if 6707 /// statement). Also performs the standard function and array 6708 /// decays, possibly changing the input variable. 6709 /// 6710 /// \param Loc - A location associated with the condition, e.g. the 6711 /// 'if' keyword. 6712 /// \return true iff there were any errors 6713 ExprResult CheckBooleanCondition(Expr *E, SourceLocation Loc); 6714 6715 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 6716 Expr *SubExpr); 6717 6718 /// DiagnoseAssignmentAsCondition - Given that an expression is 6719 /// being used as a boolean condition, warn if it's an assignment. 6720 void DiagnoseAssignmentAsCondition(Expr *E); 6721 6722 /// \brief Redundant parentheses over an equality comparison can indicate 6723 /// that the user intended an assignment used as condition. 6724 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE); 6725 6726 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 6727 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 6728 6729 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 6730 /// the specified width and sign. If an overflow occurs, detect it and emit 6731 /// the specified diagnostic. 6732 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 6733 unsigned NewWidth, bool NewSign, 6734 SourceLocation Loc, unsigned DiagID); 6735 6736 /// Checks that the Objective-C declaration is declared in the global scope. 6737 /// Emits an error and marks the declaration as invalid if it's not declared 6738 /// in the global scope. 6739 bool CheckObjCDeclScope(Decl *D); 6740 6741 /// VerifyIntegerConstantExpression - Verifies that an expression is an ICE, 6742 /// and reports the appropriate diagnostics. Returns false on success. 6743 /// Can optionally return the value of the expression. 6744 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, 6745 const PartialDiagnostic &Diag, 6746 bool AllowFold, 6747 const PartialDiagnostic &FoldDiag); 6748 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, 6749 const PartialDiagnostic &Diag, 6750 bool AllowFold = true) { 6751 return VerifyIntegerConstantExpression(E, Result, Diag, AllowFold, 6752 PDiag(0)); 6753 } 6754 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result = 0); 6755 6756 /// VerifyBitField - verifies that a bit field expression is an ICE and has 6757 /// the correct width, and that the field type is valid. 6758 /// Returns false on success. 6759 /// Can optionally return whether the bit-field is of width 0 6760 ExprResult VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 6761 QualType FieldTy, Expr *BitWidth, 6762 bool *ZeroWidth = 0); 6763 6764 enum CUDAFunctionTarget { 6765 CFT_Device, 6766 CFT_Global, 6767 CFT_Host, 6768 CFT_HostDevice 6769 }; 6770 6771 CUDAFunctionTarget IdentifyCUDATarget(const FunctionDecl *D); 6772 6773 bool CheckCUDATarget(CUDAFunctionTarget CallerTarget, 6774 CUDAFunctionTarget CalleeTarget); 6775 6776 bool CheckCUDATarget(const FunctionDecl *Caller, const FunctionDecl *Callee) { 6777 return CheckCUDATarget(IdentifyCUDATarget(Caller), 6778 IdentifyCUDATarget(Callee)); 6779 } 6780 6781 /// \name Code completion 6782 //@{ 6783 /// \brief Describes the context in which code completion occurs. 6784 enum ParserCompletionContext { 6785 /// \brief Code completion occurs at top-level or namespace context. 6786 PCC_Namespace, 6787 /// \brief Code completion occurs within a class, struct, or union. 6788 PCC_Class, 6789 /// \brief Code completion occurs within an Objective-C interface, protocol, 6790 /// or category. 6791 PCC_ObjCInterface, 6792 /// \brief Code completion occurs within an Objective-C implementation or 6793 /// category implementation 6794 PCC_ObjCImplementation, 6795 /// \brief Code completion occurs within the list of instance variables 6796 /// in an Objective-C interface, protocol, category, or implementation. 6797 PCC_ObjCInstanceVariableList, 6798 /// \brief Code completion occurs following one or more template 6799 /// headers. 6800 PCC_Template, 6801 /// \brief Code completion occurs following one or more template 6802 /// headers within a class. 6803 PCC_MemberTemplate, 6804 /// \brief Code completion occurs within an expression. 6805 PCC_Expression, 6806 /// \brief Code completion occurs within a statement, which may 6807 /// also be an expression or a declaration. 6808 PCC_Statement, 6809 /// \brief Code completion occurs at the beginning of the 6810 /// initialization statement (or expression) in a for loop. 6811 PCC_ForInit, 6812 /// \brief Code completion occurs within the condition of an if, 6813 /// while, switch, or for statement. 6814 PCC_Condition, 6815 /// \brief Code completion occurs within the body of a function on a 6816 /// recovery path, where we do not have a specific handle on our position 6817 /// in the grammar. 6818 PCC_RecoveryInFunction, 6819 /// \brief Code completion occurs where only a type is permitted. 6820 PCC_Type, 6821 /// \brief Code completion occurs in a parenthesized expression, which 6822 /// might also be a type cast. 6823 PCC_ParenthesizedExpression, 6824 /// \brief Code completion occurs within a sequence of declaration 6825 /// specifiers within a function, method, or block. 6826 PCC_LocalDeclarationSpecifiers 6827 }; 6828 6829 void CodeCompleteModuleImport(SourceLocation ImportLoc, ModuleIdPath Path); 6830 void CodeCompleteOrdinaryName(Scope *S, 6831 ParserCompletionContext CompletionContext); 6832 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 6833 bool AllowNonIdentifiers, 6834 bool AllowNestedNameSpecifiers); 6835 6836 struct CodeCompleteExpressionData; 6837 void CodeCompleteExpression(Scope *S, 6838 const CodeCompleteExpressionData &Data); 6839 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 6840 SourceLocation OpLoc, 6841 bool IsArrow); 6842 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 6843 void CodeCompleteTag(Scope *S, unsigned TagSpec); 6844 void CodeCompleteTypeQualifiers(DeclSpec &DS); 6845 void CodeCompleteCase(Scope *S); 6846 void CodeCompleteCall(Scope *S, Expr *Fn, llvm::ArrayRef<Expr *> Args); 6847 void CodeCompleteInitializer(Scope *S, Decl *D); 6848 void CodeCompleteReturn(Scope *S); 6849 void CodeCompleteAfterIf(Scope *S); 6850 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 6851 6852 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 6853 bool EnteringContext); 6854 void CodeCompleteUsing(Scope *S); 6855 void CodeCompleteUsingDirective(Scope *S); 6856 void CodeCompleteNamespaceDecl(Scope *S); 6857 void CodeCompleteNamespaceAliasDecl(Scope *S); 6858 void CodeCompleteOperatorName(Scope *S); 6859 void CodeCompleteConstructorInitializer(Decl *Constructor, 6860 CXXCtorInitializer** Initializers, 6861 unsigned NumInitializers); 6862 void CodeCompleteLambdaIntroducer(Scope *S, LambdaIntroducer &Intro, 6863 bool AfterAmpersand); 6864 6865 void CodeCompleteObjCAtDirective(Scope *S); 6866 void CodeCompleteObjCAtVisibility(Scope *S); 6867 void CodeCompleteObjCAtStatement(Scope *S); 6868 void CodeCompleteObjCAtExpression(Scope *S); 6869 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 6870 void CodeCompleteObjCPropertyGetter(Scope *S); 6871 void CodeCompleteObjCPropertySetter(Scope *S); 6872 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 6873 bool IsParameter); 6874 void CodeCompleteObjCMessageReceiver(Scope *S); 6875 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 6876 IdentifierInfo **SelIdents, 6877 unsigned NumSelIdents, 6878 bool AtArgumentExpression); 6879 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 6880 IdentifierInfo **SelIdents, 6881 unsigned NumSelIdents, 6882 bool AtArgumentExpression, 6883 bool IsSuper = false); 6884 void CodeCompleteObjCInstanceMessage(Scope *S, Expr *Receiver, 6885 IdentifierInfo **SelIdents, 6886 unsigned NumSelIdents, 6887 bool AtArgumentExpression, 6888 ObjCInterfaceDecl *Super = 0); 6889 void CodeCompleteObjCForCollection(Scope *S, 6890 DeclGroupPtrTy IterationVar); 6891 void CodeCompleteObjCSelector(Scope *S, 6892 IdentifierInfo **SelIdents, 6893 unsigned NumSelIdents); 6894 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 6895 unsigned NumProtocols); 6896 void CodeCompleteObjCProtocolDecl(Scope *S); 6897 void CodeCompleteObjCInterfaceDecl(Scope *S); 6898 void CodeCompleteObjCSuperclass(Scope *S, 6899 IdentifierInfo *ClassName, 6900 SourceLocation ClassNameLoc); 6901 void CodeCompleteObjCImplementationDecl(Scope *S); 6902 void CodeCompleteObjCInterfaceCategory(Scope *S, 6903 IdentifierInfo *ClassName, 6904 SourceLocation ClassNameLoc); 6905 void CodeCompleteObjCImplementationCategory(Scope *S, 6906 IdentifierInfo *ClassName, 6907 SourceLocation ClassNameLoc); 6908 void CodeCompleteObjCPropertyDefinition(Scope *S); 6909 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 6910 IdentifierInfo *PropertyName); 6911 void CodeCompleteObjCMethodDecl(Scope *S, 6912 bool IsInstanceMethod, 6913 ParsedType ReturnType); 6914 void CodeCompleteObjCMethodDeclSelector(Scope *S, 6915 bool IsInstanceMethod, 6916 bool AtParameterName, 6917 ParsedType ReturnType, 6918 IdentifierInfo **SelIdents, 6919 unsigned NumSelIdents); 6920 void CodeCompletePreprocessorDirective(bool InConditional); 6921 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 6922 void CodeCompletePreprocessorMacroName(bool IsDefinition); 6923 void CodeCompletePreprocessorExpression(); 6924 void CodeCompletePreprocessorMacroArgument(Scope *S, 6925 IdentifierInfo *Macro, 6926 MacroInfo *MacroInfo, 6927 unsigned Argument); 6928 void CodeCompleteNaturalLanguage(); 6929 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 6930 CodeCompletionTUInfo &CCTUInfo, 6931 SmallVectorImpl<CodeCompletionResult> &Results); 6932 //@} 6933 6934 //===--------------------------------------------------------------------===// 6935 // Extra semantic analysis beyond the C type system 6936 6937public: 6938 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 6939 unsigned ByteNo) const; 6940 6941private: 6942 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr, 6943 const ArraySubscriptExpr *ASE=0, 6944 bool AllowOnePastEnd=true, bool IndexNegated=false); 6945 void CheckArrayAccess(const Expr *E); 6946 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 6947 bool CheckObjCMethodCall(ObjCMethodDecl *Method, SourceLocation loc, 6948 Expr **Args, unsigned NumArgs); 6949 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 6950 6951 bool CheckObjCString(Expr *Arg); 6952 6953 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6954 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6955 6956 bool SemaBuiltinVAStart(CallExpr *TheCall); 6957 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 6958 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 6959 6960public: 6961 // Used by C++ template instantiation. 6962 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 6963 6964private: 6965 bool SemaBuiltinPrefetch(CallExpr *TheCall); 6966 bool SemaBuiltinObjectSize(CallExpr *TheCall); 6967 bool SemaBuiltinLongjmp(CallExpr *TheCall); 6968 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 6969 ExprResult SemaAtomicOpsOverloaded(ExprResult TheCallResult, 6970 AtomicExpr::AtomicOp Op); 6971 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 6972 llvm::APSInt &Result); 6973 6974 enum FormatStringType { 6975 FST_Scanf, 6976 FST_Printf, 6977 FST_NSString, 6978 FST_Strftime, 6979 FST_Strfmon, 6980 FST_Kprintf, 6981 FST_Unknown 6982 }; 6983 static FormatStringType GetFormatStringType(const FormatAttr *Format); 6984 bool SemaCheckStringLiteral(const Expr *E, Expr **Args, unsigned NumArgs, 6985 bool HasVAListArg, unsigned format_idx, 6986 unsigned firstDataArg, FormatStringType Type, 6987 bool inFunctionCall = true); 6988 6989 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 6990 Expr **Args, unsigned NumArgs, bool HasVAListArg, 6991 unsigned format_idx, unsigned firstDataArg, 6992 FormatStringType Type, bool inFunctionCall); 6993 6994 void CheckFormatArguments(const FormatAttr *Format, CallExpr *TheCall); 6995 void CheckFormatArguments(const FormatAttr *Format, Expr **Args, 6996 unsigned NumArgs, bool IsCXXMember, 6997 SourceLocation Loc, SourceRange Range); 6998 void CheckFormatArguments(Expr **Args, unsigned NumArgs, 6999 bool HasVAListArg, unsigned format_idx, 7000 unsigned firstDataArg, FormatStringType Type, 7001 SourceLocation Loc, SourceRange range); 7002 7003 void CheckNonNullArguments(const NonNullAttr *NonNull, 7004 const Expr * const *ExprArgs, 7005 SourceLocation CallSiteLoc); 7006 7007 void CheckMemaccessArguments(const CallExpr *Call, 7008 unsigned BId, 7009 IdentifierInfo *FnName); 7010 7011 void CheckStrlcpycatArguments(const CallExpr *Call, 7012 IdentifierInfo *FnName); 7013 7014 void CheckStrncatArguments(const CallExpr *Call, 7015 IdentifierInfo *FnName); 7016 7017 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 7018 SourceLocation ReturnLoc); 7019 void CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr* RHS); 7020 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 7021 7022 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 7023 Expr *Init); 7024 7025 /// \brief The parser's current scope. 7026 /// 7027 /// The parser maintains this state here. 7028 Scope *CurScope; 7029 7030protected: 7031 friend class Parser; 7032 friend class InitializationSequence; 7033 friend class ASTReader; 7034 friend class ASTWriter; 7035 7036public: 7037 /// \brief Retrieve the parser's current scope. 7038 /// 7039 /// This routine must only be used when it is certain that semantic analysis 7040 /// and the parser are in precisely the same context, which is not the case 7041 /// when, e.g., we are performing any kind of template instantiation. 7042 /// Therefore, the only safe places to use this scope are in the parser 7043 /// itself and in routines directly invoked from the parser and *never* from 7044 /// template substitution or instantiation. 7045 Scope *getCurScope() const { return CurScope; } 7046 7047 Decl *getObjCDeclContext() const; 7048 7049 DeclContext *getCurLexicalContext() const { 7050 return OriginalLexicalContext ? OriginalLexicalContext : CurContext; 7051 } 7052 7053 AvailabilityResult getCurContextAvailability() const; 7054}; 7055 7056/// \brief RAII object that enters a new expression evaluation context. 7057class EnterExpressionEvaluationContext { 7058 Sema &Actions; 7059 7060public: 7061 EnterExpressionEvaluationContext(Sema &Actions, 7062 Sema::ExpressionEvaluationContext NewContext, 7063 Decl *LambdaContextDecl = 0, 7064 bool IsDecltype = false) 7065 : Actions(Actions) { 7066 Actions.PushExpressionEvaluationContext(NewContext, LambdaContextDecl, 7067 IsDecltype); 7068 } 7069 7070 ~EnterExpressionEvaluationContext() { 7071 Actions.PopExpressionEvaluationContext(); 7072 } 7073}; 7074 7075} // end namespace clang 7076 7077#endif 7078