Sema.h revision 78a542478dd63c2789816dcc1cdab5c9a6eef99b
1//===--- Sema.h - Semantic Analysis & AST Building --------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Sema class, which performs semantic analysis and 11// builds ASTs. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef LLVM_CLANG_SEMA_SEMA_H 16#define LLVM_CLANG_SEMA_SEMA_H 17 18#include "clang/Sema/Ownership.h" 19#include "clang/Sema/AnalysisBasedWarnings.h" 20#include "clang/Sema/IdentifierResolver.h" 21#include "clang/Sema/ObjCMethodList.h" 22#include "clang/Sema/DeclSpec.h" 23#include "clang/Sema/ExternalSemaSource.h" 24#include "clang/Sema/LocInfoType.h" 25#include "clang/Sema/MultiInitializer.h" 26#include "clang/Sema/TypoCorrection.h" 27#include "clang/Sema/Weak.h" 28#include "clang/AST/Expr.h" 29#include "clang/AST/DeclarationName.h" 30#include "clang/AST/ExternalASTSource.h" 31#include "clang/AST/TypeLoc.h" 32#include "clang/Lex/ModuleLoader.h" 33#include "clang/Basic/Specifiers.h" 34#include "clang/Basic/TemplateKinds.h" 35#include "clang/Basic/TypeTraits.h" 36#include "clang/Basic/ExpressionTraits.h" 37#include "llvm/ADT/ArrayRef.h" 38#include "llvm/ADT/OwningPtr.h" 39#include "llvm/ADT/SmallPtrSet.h" 40#include "llvm/ADT/SmallVector.h" 41#include <deque> 42#include <string> 43 44namespace llvm { 45 class APSInt; 46 template <typename ValueT> struct DenseMapInfo; 47 template <typename ValueT, typename ValueInfoT> class DenseSet; 48} 49 50namespace clang { 51 class ADLResult; 52 class ASTConsumer; 53 class ASTContext; 54 class ASTMutationListener; 55 class ASTReader; 56 class ASTWriter; 57 class ArrayType; 58 class AttributeList; 59 class BlockDecl; 60 class CXXBasePath; 61 class CXXBasePaths; 62 typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 63 class CXXConstructorDecl; 64 class CXXConversionDecl; 65 class CXXDestructorDecl; 66 class CXXFieldCollector; 67 class CXXMemberCallExpr; 68 class CXXMethodDecl; 69 class CXXScopeSpec; 70 class CXXTemporary; 71 class CXXTryStmt; 72 class CallExpr; 73 class ClassTemplateDecl; 74 class ClassTemplatePartialSpecializationDecl; 75 class ClassTemplateSpecializationDecl; 76 class CodeCompleteConsumer; 77 class CodeCompletionAllocator; 78 class CodeCompletionResult; 79 class Decl; 80 class DeclAccessPair; 81 class DeclContext; 82 class DeclRefExpr; 83 class DeclaratorDecl; 84 class DeducedTemplateArgument; 85 class DependentDiagnostic; 86 class DesignatedInitExpr; 87 class Designation; 88 class EnumConstantDecl; 89 class Expr; 90 class ExtVectorType; 91 class ExternalSemaSource; 92 class FormatAttr; 93 class FriendDecl; 94 class FunctionDecl; 95 class FunctionProtoType; 96 class FunctionTemplateDecl; 97 class ImplicitConversionSequence; 98 class InitListExpr; 99 class InitializationKind; 100 class InitializationSequence; 101 class InitializedEntity; 102 class IntegerLiteral; 103 class LabelStmt; 104 class LangOptions; 105 class LocalInstantiationScope; 106 class LookupResult; 107 class MacroInfo; 108 class MultiLevelTemplateArgumentList; 109 class NamedDecl; 110 class NonNullAttr; 111 class ObjCCategoryDecl; 112 class ObjCCategoryImplDecl; 113 class ObjCCompatibleAliasDecl; 114 class ObjCContainerDecl; 115 class ObjCImplDecl; 116 class ObjCImplementationDecl; 117 class ObjCInterfaceDecl; 118 class ObjCIvarDecl; 119 template <class T> class ObjCList; 120 class ObjCMessageExpr; 121 class ObjCMethodDecl; 122 class ObjCPropertyDecl; 123 class ObjCProtocolDecl; 124 class OverloadCandidateSet; 125 class OverloadExpr; 126 class ParenListExpr; 127 class ParmVarDecl; 128 class Preprocessor; 129 class PseudoDestructorTypeStorage; 130 class PseudoObjectExpr; 131 class QualType; 132 class StandardConversionSequence; 133 class Stmt; 134 class StringLiteral; 135 class SwitchStmt; 136 class TargetAttributesSema; 137 class TemplateArgument; 138 class TemplateArgumentList; 139 class TemplateArgumentLoc; 140 class TemplateDecl; 141 class TemplateParameterList; 142 class TemplatePartialOrderingContext; 143 class TemplateTemplateParmDecl; 144 class Token; 145 class TypeAliasDecl; 146 class TypedefDecl; 147 class TypedefNameDecl; 148 class TypeLoc; 149 class UnqualifiedId; 150 class UnresolvedLookupExpr; 151 class UnresolvedMemberExpr; 152 class UnresolvedSetImpl; 153 class UnresolvedSetIterator; 154 class UsingDecl; 155 class UsingShadowDecl; 156 class ValueDecl; 157 class VarDecl; 158 class VisibilityAttr; 159 class VisibleDeclConsumer; 160 class IndirectFieldDecl; 161 162namespace sema { 163 class AccessedEntity; 164 class BlockScopeInfo; 165 class DelayedDiagnostic; 166 class FunctionScopeInfo; 167 class LambdaScopeInfo; 168 class PossiblyUnreachableDiag; 169 class TemplateDeductionInfo; 170} 171 172// FIXME: No way to easily map from TemplateTypeParmTypes to 173// TemplateTypeParmDecls, so we have this horrible PointerUnion. 174typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 175 SourceLocation> UnexpandedParameterPack; 176 177/// Sema - This implements semantic analysis and AST building for C. 178class Sema { 179 Sema(const Sema&); // DO NOT IMPLEMENT 180 void operator=(const Sema&); // DO NOT IMPLEMENT 181 mutable const TargetAttributesSema* TheTargetAttributesSema; 182public: 183 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 184 typedef OpaquePtr<TemplateName> TemplateTy; 185 typedef OpaquePtr<QualType> TypeTy; 186 187 OpenCLOptions OpenCLFeatures; 188 FPOptions FPFeatures; 189 190 const LangOptions &LangOpts; 191 Preprocessor &PP; 192 ASTContext &Context; 193 ASTConsumer &Consumer; 194 DiagnosticsEngine &Diags; 195 SourceManager &SourceMgr; 196 197 /// \brief Flag indicating whether or not to collect detailed statistics. 198 bool CollectStats; 199 200 /// \brief Source of additional semantic information. 201 ExternalSemaSource *ExternalSource; 202 203 /// \brief Code-completion consumer. 204 CodeCompleteConsumer *CodeCompleter; 205 206 /// CurContext - This is the current declaration context of parsing. 207 DeclContext *CurContext; 208 209 /// \brief Generally null except when we temporarily switch decl contexts, 210 /// like in \see ActOnObjCTemporaryExitContainerContext. 211 DeclContext *OriginalLexicalContext; 212 213 /// VAListTagName - The declaration name corresponding to __va_list_tag. 214 /// This is used as part of a hack to omit that class from ADL results. 215 DeclarationName VAListTagName; 216 217 /// PackContext - Manages the stack for #pragma pack. An alignment 218 /// of 0 indicates default alignment. 219 void *PackContext; // Really a "PragmaPackStack*" 220 221 bool MSStructPragmaOn; // True when #pragma ms_struct on 222 223 /// VisContext - Manages the stack for #pragma GCC visibility. 224 void *VisContext; // Really a "PragmaVisStack*" 225 226 /// ExprNeedsCleanups - True if the current evaluation context 227 /// requires cleanups to be run at its conclusion. 228 bool ExprNeedsCleanups; 229 230 /// ExprCleanupObjects - This is the stack of objects requiring 231 /// cleanup that are created by the current full expression. The 232 /// element type here is ExprWithCleanups::Object. 233 SmallVector<BlockDecl*, 8> ExprCleanupObjects; 234 235 /// \brief Stack containing information about each of the nested 236 /// function, block, and method scopes that are currently active. 237 /// 238 /// This array is never empty. Clients should ignore the first 239 /// element, which is used to cache a single FunctionScopeInfo 240 /// that's used to parse every top-level function. 241 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 242 243 typedef LazyVector<TypedefNameDecl *, ExternalSemaSource, 244 &ExternalSemaSource::ReadExtVectorDecls, 2, 2> 245 ExtVectorDeclsType; 246 247 /// ExtVectorDecls - This is a list all the extended vector types. This allows 248 /// us to associate a raw vector type with one of the ext_vector type names. 249 /// This is only necessary for issuing pretty diagnostics. 250 ExtVectorDeclsType ExtVectorDecls; 251 252 /// \brief The set of types for which we have already complained about the 253 /// definitions being hidden. 254 /// 255 /// This set is used to suppress redundant diagnostics. 256 llvm::SmallPtrSet<NamedDecl *, 4> HiddenDefinitions; 257 258 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 259 llvm::OwningPtr<CXXFieldCollector> FieldCollector; 260 261 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 262 263 /// PureVirtualClassDiagSet - a set of class declarations which we have 264 /// emitted a list of pure virtual functions. Used to prevent emitting the 265 /// same list more than once. 266 llvm::OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 267 268 /// ParsingInitForAutoVars - a set of declarations with auto types for which 269 /// we are currently parsing the initializer. 270 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 271 272 /// \brief A mapping from external names to the most recent 273 /// locally-scoped external declaration with that name. 274 /// 275 /// This map contains external declarations introduced in local 276 /// scoped, e.g., 277 /// 278 /// \code 279 /// void f() { 280 /// void foo(int, int); 281 /// } 282 /// \endcode 283 /// 284 /// Here, the name "foo" will be associated with the declaration on 285 /// "foo" within f. This name is not visible outside of 286 /// "f". However, we still find it in two cases: 287 /// 288 /// - If we are declaring another external with the name "foo", we 289 /// can find "foo" as a previous declaration, so that the types 290 /// of this external declaration can be checked for 291 /// compatibility. 292 /// 293 /// - If we would implicitly declare "foo" (e.g., due to a call to 294 /// "foo" in C when no prototype or definition is visible), then 295 /// we find this declaration of "foo" and complain that it is 296 /// not visible. 297 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 298 299 /// \brief Look for a locally scoped external declaration by the given name. 300 llvm::DenseMap<DeclarationName, NamedDecl *>::iterator 301 findLocallyScopedExternalDecl(DeclarationName Name); 302 303 typedef LazyVector<VarDecl *, ExternalSemaSource, 304 &ExternalSemaSource::ReadTentativeDefinitions, 2, 2> 305 TentativeDefinitionsType; 306 307 /// \brief All the tentative definitions encountered in the TU. 308 TentativeDefinitionsType TentativeDefinitions; 309 310 typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource, 311 &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2> 312 UnusedFileScopedDeclsType; 313 314 /// \brief The set of file scoped decls seen so far that have not been used 315 /// and must warn if not used. Only contains the first declaration. 316 UnusedFileScopedDeclsType UnusedFileScopedDecls; 317 318 typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource, 319 &ExternalSemaSource::ReadDelegatingConstructors, 2, 2> 320 DelegatingCtorDeclsType; 321 322 /// \brief All the delegating constructors seen so far in the file, used for 323 /// cycle detection at the end of the TU. 324 DelegatingCtorDeclsType DelegatingCtorDecls; 325 326 /// \brief All the overriding destructors seen during a class definition 327 /// (there could be multiple due to nested classes) that had their exception 328 /// spec checks delayed, plus the overridden destructor. 329 SmallVector<std::pair<const CXXDestructorDecl*, 330 const CXXDestructorDecl*>, 2> 331 DelayedDestructorExceptionSpecChecks; 332 333 /// \brief Callback to the parser to parse templated functions when needed. 334 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 335 LateTemplateParserCB *LateTemplateParser; 336 void *OpaqueParser; 337 338 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 339 LateTemplateParser = LTP; 340 OpaqueParser = P; 341 } 342 343 class DelayedDiagnostics; 344 345 class ParsingDeclState { 346 unsigned SavedStackSize; 347 friend class Sema::DelayedDiagnostics; 348 }; 349 350 class ProcessingContextState { 351 unsigned SavedParsingDepth; 352 unsigned SavedActiveStackBase; 353 friend class Sema::DelayedDiagnostics; 354 }; 355 356 /// A class which encapsulates the logic for delaying diagnostics 357 /// during parsing and other processing. 358 class DelayedDiagnostics { 359 /// \brief The stack of diagnostics that were delayed due to being 360 /// produced during the parsing of a declaration. 361 sema::DelayedDiagnostic *Stack; 362 363 /// \brief The number of objects on the delayed-diagnostics stack. 364 unsigned StackSize; 365 366 /// \brief The current capacity of the delayed-diagnostics stack. 367 unsigned StackCapacity; 368 369 /// \brief The index of the first "active" delayed diagnostic in 370 /// the stack. When parsing class definitions, we ignore active 371 /// delayed diagnostics from the surrounding context. 372 unsigned ActiveStackBase; 373 374 /// \brief The depth of the declarations we're currently parsing. 375 /// This gets saved and reset whenever we enter a class definition. 376 unsigned ParsingDepth; 377 378 public: 379 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 380 ActiveStackBase(0), ParsingDepth(0) {} 381 382 ~DelayedDiagnostics() { 383 delete[] reinterpret_cast<char*>(Stack); 384 } 385 386 /// Adds a delayed diagnostic. 387 void add(const sema::DelayedDiagnostic &diag); 388 389 /// Determines whether diagnostics should be delayed. 390 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 391 392 /// Observe that we've started parsing a declaration. Access and 393 /// deprecation diagnostics will be delayed; when the declaration 394 /// is completed, all active delayed diagnostics will be evaluated 395 /// in its context, and then active diagnostics stack will be 396 /// popped down to the saved depth. 397 ParsingDeclState pushParsingDecl() { 398 ParsingDepth++; 399 400 ParsingDeclState state; 401 state.SavedStackSize = StackSize; 402 return state; 403 } 404 405 /// Observe that we're completed parsing a declaration. 406 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 407 408 /// Observe that we've started processing a different context, the 409 /// contents of which are semantically separate from the 410 /// declarations it may lexically appear in. This sets aside the 411 /// current stack of active diagnostics and starts afresh. 412 ProcessingContextState pushContext() { 413 assert(StackSize >= ActiveStackBase); 414 415 ProcessingContextState state; 416 state.SavedParsingDepth = ParsingDepth; 417 state.SavedActiveStackBase = ActiveStackBase; 418 419 ActiveStackBase = StackSize; 420 ParsingDepth = 0; 421 422 return state; 423 } 424 425 /// Observe that we've stopped processing a context. This 426 /// restores the previous stack of active diagnostics. 427 void popContext(ProcessingContextState state) { 428 assert(ActiveStackBase == StackSize); 429 assert(ParsingDepth == 0); 430 ActiveStackBase = state.SavedActiveStackBase; 431 ParsingDepth = state.SavedParsingDepth; 432 } 433 } DelayedDiagnostics; 434 435 /// A RAII object to temporarily push a declaration context. 436 class ContextRAII { 437 private: 438 Sema &S; 439 DeclContext *SavedContext; 440 ProcessingContextState SavedContextState; 441 442 public: 443 ContextRAII(Sema &S, DeclContext *ContextToPush) 444 : S(S), SavedContext(S.CurContext), 445 SavedContextState(S.DelayedDiagnostics.pushContext()) 446 { 447 assert(ContextToPush && "pushing null context"); 448 S.CurContext = ContextToPush; 449 } 450 451 void pop() { 452 if (!SavedContext) return; 453 S.CurContext = SavedContext; 454 S.DelayedDiagnostics.popContext(SavedContextState); 455 SavedContext = 0; 456 } 457 458 ~ContextRAII() { 459 pop(); 460 } 461 }; 462 463 /// WeakUndeclaredIdentifiers - Identifiers contained in 464 /// #pragma weak before declared. rare. may alias another 465 /// identifier, declared or undeclared 466 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 467 468 /// \brief Load weak undeclared identifiers from the external source. 469 void LoadExternalWeakUndeclaredIdentifiers(); 470 471 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 472 /// #pragma weak during processing of other Decls. 473 /// I couldn't figure out a clean way to generate these in-line, so 474 /// we store them here and handle separately -- which is a hack. 475 /// It would be best to refactor this. 476 SmallVector<Decl*,2> WeakTopLevelDecl; 477 478 IdentifierResolver IdResolver; 479 480 /// Translation Unit Scope - useful to Objective-C actions that need 481 /// to lookup file scope declarations in the "ordinary" C decl namespace. 482 /// For example, user-defined classes, built-in "id" type, etc. 483 Scope *TUScope; 484 485 /// \brief The C++ "std" namespace, where the standard library resides. 486 LazyDeclPtr StdNamespace; 487 488 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 489 /// standard library. 490 LazyDeclPtr StdBadAlloc; 491 492 /// \brief The C++ "std::initializer_list" template, which is defined in 493 /// <initializer_list>. 494 ClassTemplateDecl *StdInitializerList; 495 496 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 497 RecordDecl *CXXTypeInfoDecl; 498 499 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 500 RecordDecl *MSVCGuidDecl; 501 502 /// A flag to remember whether the implicit forms of operator new and delete 503 /// have been declared. 504 bool GlobalNewDeleteDeclared; 505 506 507 /// A flag that is set when parsing a -dealloc method and no [super dealloc] 508 /// call was found yet. 509 bool ObjCShouldCallSuperDealloc; 510 /// A flag that is set when parsing a -finalize method and no [super finalize] 511 /// call was found yet. 512 bool ObjCShouldCallSuperFinalize; 513 514 /// \brief Describes how the expressions currently being parsed are 515 /// evaluated at run-time, if at all. 516 enum ExpressionEvaluationContext { 517 /// \brief The current expression and its subexpressions occur within an 518 /// unevaluated operand (C++11 [expr]p7), such as the subexpression of 519 /// \c sizeof, where the type of the expression may be significant but 520 /// no code will be generated to evaluate the value of the expression at 521 /// run time. 522 Unevaluated, 523 524 /// \brief The current context is "potentially evaluated" in C++11 terms, 525 /// but the expression is evaluated at compile-time (like the values of 526 /// cases in a switch statment). 527 ConstantEvaluated, 528 529 /// \brief The current expression is potentially evaluated at run time, 530 /// which means that code may be generated to evaluate the value of the 531 /// expression at run time. 532 PotentiallyEvaluated, 533 534 /// \brief The current expression is potentially evaluated, but any 535 /// declarations referenced inside that expression are only used if 536 /// in fact the current expression is used. 537 /// 538 /// This value is used when parsing default function arguments, for which 539 /// we would like to provide diagnostics (e.g., passing non-POD arguments 540 /// through varargs) but do not want to mark declarations as "referenced" 541 /// until the default argument is used. 542 PotentiallyEvaluatedIfUsed 543 }; 544 545 /// \brief Data structure used to record current or nested 546 /// expression evaluation contexts. 547 struct ExpressionEvaluationContextRecord { 548 /// \brief The expression evaluation context. 549 ExpressionEvaluationContext Context; 550 551 /// \brief Whether the enclosing context needed a cleanup. 552 bool ParentNeedsCleanups; 553 554 /// \brief The number of active cleanup objects when we entered 555 /// this expression evaluation context. 556 unsigned NumCleanupObjects; 557 558 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 559 unsigned NumCleanupObjects, 560 bool ParentNeedsCleanups) 561 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups), 562 NumCleanupObjects(NumCleanupObjects) { } 563 }; 564 565 /// A stack of expression evaluation contexts. 566 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 567 568 /// SpecialMemberOverloadResult - The overloading result for a special member 569 /// function. 570 /// 571 /// This is basically a wrapper around PointerIntPair. The lowest bit of the 572 /// integer is used to determine whether we have a parameter qualification 573 /// match, the second-lowest is whether we had success in resolving the 574 /// overload to a unique non-deleted function. 575 /// 576 /// The ConstParamMatch bit represents whether, when looking up a copy 577 /// constructor or assignment operator, we found a potential copy 578 /// constructor/assignment operator whose first parameter is const-qualified. 579 /// This is used for determining parameter types of other objects and is 580 /// utterly meaningless on other types of special members. 581 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 582 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 583 public: 584 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 585 : FastFoldingSetNode(ID) 586 {} 587 588 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 589 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 590 591 bool hasSuccess() const { return Pair.getInt() & 0x1; } 592 void setSuccess(bool B) { 593 Pair.setInt(unsigned(B) | hasConstParamMatch() << 1); 594 } 595 596 bool hasConstParamMatch() const { return Pair.getInt() & 0x2; } 597 void setConstParamMatch(bool B) { 598 Pair.setInt(B << 1 | unsigned(hasSuccess())); 599 } 600 }; 601 602 /// \brief A cache of special member function overload resolution results 603 /// for C++ records. 604 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 605 606 /// \brief The kind of translation unit we are processing. 607 /// 608 /// When we're processing a complete translation unit, Sema will perform 609 /// end-of-translation-unit semantic tasks (such as creating 610 /// initializers for tentative definitions in C) once parsing has 611 /// completed. Modules and precompiled headers perform different kinds of 612 /// checks. 613 TranslationUnitKind TUKind; 614 615 llvm::BumpPtrAllocator BumpAlloc; 616 617 /// \brief The number of SFINAE diagnostics that have been trapped. 618 unsigned NumSFINAEErrors; 619 620 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> > 621 UnparsedDefaultArgInstantiationsMap; 622 623 /// \brief A mapping from parameters with unparsed default arguments to the 624 /// set of instantiations of each parameter. 625 /// 626 /// This mapping is a temporary data structure used when parsing 627 /// nested class templates or nested classes of class templates, 628 /// where we might end up instantiating an inner class before the 629 /// default arguments of its methods have been parsed. 630 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 631 632 // Contains the locations of the beginning of unparsed default 633 // argument locations. 634 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 635 636 /// UndefinedInternals - all the used, undefined objects with 637 /// internal linkage in this translation unit. 638 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 639 640 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 641 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 642 643 /// Method Pool - allows efficient lookup when typechecking messages to "id". 644 /// We need to maintain a list, since selectors can have differing signatures 645 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 646 /// of selectors are "overloaded"). 647 GlobalMethodPool MethodPool; 648 649 /// Method selectors used in a @selector expression. Used for implementation 650 /// of -Wselector. 651 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 652 653 GlobalMethodPool::iterator ReadMethodPool(Selector Sel); 654 655 /// Private Helper predicate to check for 'self'. 656 bool isSelfExpr(Expr *RExpr); 657public: 658 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 659 TranslationUnitKind TUKind = TU_Complete, 660 CodeCompleteConsumer *CompletionConsumer = 0); 661 ~Sema(); 662 663 /// \brief Perform initialization that occurs after the parser has been 664 /// initialized but before it parses anything. 665 void Initialize(); 666 667 const LangOptions &getLangOptions() const { return LangOpts; } 668 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 669 FPOptions &getFPOptions() { return FPFeatures; } 670 671 DiagnosticsEngine &getDiagnostics() const { return Diags; } 672 SourceManager &getSourceManager() const { return SourceMgr; } 673 const TargetAttributesSema &getTargetAttributesSema() const; 674 Preprocessor &getPreprocessor() const { return PP; } 675 ASTContext &getASTContext() const { return Context; } 676 ASTConsumer &getASTConsumer() const { return Consumer; } 677 ASTMutationListener *getASTMutationListener() const; 678 679 void PrintStats() const; 680 681 /// \brief Helper class that creates diagnostics with optional 682 /// template instantiation stacks. 683 /// 684 /// This class provides a wrapper around the basic DiagnosticBuilder 685 /// class that emits diagnostics. SemaDiagnosticBuilder is 686 /// responsible for emitting the diagnostic (as DiagnosticBuilder 687 /// does) and, if the diagnostic comes from inside a template 688 /// instantiation, printing the template instantiation stack as 689 /// well. 690 class SemaDiagnosticBuilder : public DiagnosticBuilder { 691 Sema &SemaRef; 692 unsigned DiagID; 693 694 public: 695 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 696 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 697 698 explicit SemaDiagnosticBuilder(Sema &SemaRef) 699 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 700 701 ~SemaDiagnosticBuilder(); 702 }; 703 704 /// \brief Emit a diagnostic. 705 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 706 707 /// \brief Emit a partial diagnostic. 708 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 709 710 /// \brief Build a partial diagnostic. 711 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 712 713 bool findMacroSpelling(SourceLocation &loc, StringRef name); 714 715 /// \brief Get a string to suggest for zero-initialization of a type. 716 const char *getFixItZeroInitializerForType(QualType T) const; 717 718 ExprResult Owned(Expr* E) { return E; } 719 ExprResult Owned(ExprResult R) { return R; } 720 StmtResult Owned(Stmt* S) { return S; } 721 722 void ActOnEndOfTranslationUnit(); 723 724 void CheckDelegatingCtorCycles(); 725 726 Scope *getScopeForContext(DeclContext *Ctx); 727 728 void PushFunctionScope(); 729 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 730 void PushLambdaScope(CXXRecordDecl *Lambda); 731 void PopFunctionScopeInfo(const sema::AnalysisBasedWarnings::Policy *WP =0, 732 const Decl *D = 0, const BlockExpr *blkExpr = 0); 733 734 sema::FunctionScopeInfo *getCurFunction() const { 735 return FunctionScopes.back(); 736 } 737 738 bool hasAnyUnrecoverableErrorsInThisFunction() const; 739 740 /// \brief Retrieve the current block, if any. 741 sema::BlockScopeInfo *getCurBlock(); 742 743 /// \brief Retrieve the current lambda expression, if any. 744 sema::LambdaScopeInfo *getCurLambda(); 745 746 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 747 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 748 749 //===--------------------------------------------------------------------===// 750 // Type Analysis / Processing: SemaType.cpp. 751 // 752 753 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 754 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 755 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 756 } 757 QualType BuildPointerType(QualType T, 758 SourceLocation Loc, DeclarationName Entity); 759 QualType BuildReferenceType(QualType T, bool LValueRef, 760 SourceLocation Loc, DeclarationName Entity); 761 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 762 Expr *ArraySize, unsigned Quals, 763 SourceRange Brackets, DeclarationName Entity); 764 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 765 SourceLocation AttrLoc); 766 QualType BuildFunctionType(QualType T, 767 QualType *ParamTypes, unsigned NumParamTypes, 768 bool Variadic, unsigned Quals, 769 RefQualifierKind RefQualifier, 770 SourceLocation Loc, DeclarationName Entity, 771 FunctionType::ExtInfo Info); 772 QualType BuildMemberPointerType(QualType T, QualType Class, 773 SourceLocation Loc, 774 DeclarationName Entity); 775 QualType BuildBlockPointerType(QualType T, 776 SourceLocation Loc, DeclarationName Entity); 777 QualType BuildParenType(QualType T); 778 QualType BuildAtomicType(QualType T, SourceLocation Loc); 779 780 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); 781 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); 782 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 783 TypeSourceInfo *ReturnTypeInfo); 784 /// \brief Package the given type and TSI into a ParsedType. 785 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 786 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 787 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 788 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 789 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 790 bool CheckDistantExceptionSpec(QualType T); 791 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 792 bool CheckEquivalentExceptionSpec( 793 const FunctionProtoType *Old, SourceLocation OldLoc, 794 const FunctionProtoType *New, SourceLocation NewLoc); 795 bool CheckEquivalentExceptionSpec( 796 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 797 const FunctionProtoType *Old, SourceLocation OldLoc, 798 const FunctionProtoType *New, SourceLocation NewLoc, 799 bool *MissingExceptionSpecification = 0, 800 bool *MissingEmptyExceptionSpecification = 0, 801 bool AllowNoexceptAllMatchWithNoSpec = false, 802 bool IsOperatorNew = false); 803 bool CheckExceptionSpecSubset( 804 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 805 const FunctionProtoType *Superset, SourceLocation SuperLoc, 806 const FunctionProtoType *Subset, SourceLocation SubLoc); 807 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 808 const FunctionProtoType *Target, SourceLocation TargetLoc, 809 const FunctionProtoType *Source, SourceLocation SourceLoc); 810 811 TypeResult ActOnTypeName(Scope *S, Declarator &D); 812 813 /// \brief The parser has parsed the context-sensitive type 'instancetype' 814 /// in an Objective-C message declaration. Return the appropriate type. 815 ParsedType ActOnObjCInstanceType(SourceLocation Loc); 816 817 bool RequireCompleteType(SourceLocation Loc, QualType T, 818 const PartialDiagnostic &PD, 819 std::pair<SourceLocation, PartialDiagnostic> Note); 820 bool RequireCompleteType(SourceLocation Loc, QualType T, 821 const PartialDiagnostic &PD); 822 bool RequireCompleteType(SourceLocation Loc, QualType T, 823 unsigned DiagID); 824 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 825 std::pair<SourceLocation, 826 PartialDiagnostic> Note); 827 828 bool RequireLiteralType(SourceLocation Loc, QualType T, 829 const PartialDiagnostic &PD, 830 bool AllowIncompleteType = false); 831 832 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 833 const CXXScopeSpec &SS, QualType T); 834 835 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 836 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 837 QualType BuildUnaryTransformType(QualType BaseType, 838 UnaryTransformType::UTTKind UKind, 839 SourceLocation Loc); 840 841 //===--------------------------------------------------------------------===// 842 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 843 // 844 845 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 846 847 void DiagnoseUseOfUnimplementedSelectors(); 848 849 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 850 Scope *S, CXXScopeSpec *SS = 0, 851 bool isClassName = false, 852 bool HasTrailingDot = false, 853 ParsedType ObjectType = ParsedType(), 854 bool WantNontrivialTypeSourceInfo = false, 855 IdentifierInfo **CorrectedII = 0); 856 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 857 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS, Scope *S); 858 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 859 SourceLocation IILoc, 860 Scope *S, 861 CXXScopeSpec *SS, 862 ParsedType &SuggestedType); 863 864 /// \brief Describes the result of the name lookup and resolution performed 865 /// by \c ClassifyName(). 866 enum NameClassificationKind { 867 NC_Unknown, 868 NC_Error, 869 NC_Keyword, 870 NC_Type, 871 NC_Expression, 872 NC_NestedNameSpecifier, 873 NC_TypeTemplate, 874 NC_FunctionTemplate 875 }; 876 877 class NameClassification { 878 NameClassificationKind Kind; 879 ExprResult Expr; 880 TemplateName Template; 881 ParsedType Type; 882 const IdentifierInfo *Keyword; 883 884 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 885 886 public: 887 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 888 889 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 890 891 NameClassification(const IdentifierInfo *Keyword) 892 : Kind(NC_Keyword), Keyword(Keyword) { } 893 894 static NameClassification Error() { 895 return NameClassification(NC_Error); 896 } 897 898 static NameClassification Unknown() { 899 return NameClassification(NC_Unknown); 900 } 901 902 static NameClassification NestedNameSpecifier() { 903 return NameClassification(NC_NestedNameSpecifier); 904 } 905 906 static NameClassification TypeTemplate(TemplateName Name) { 907 NameClassification Result(NC_TypeTemplate); 908 Result.Template = Name; 909 return Result; 910 } 911 912 static NameClassification FunctionTemplate(TemplateName Name) { 913 NameClassification Result(NC_FunctionTemplate); 914 Result.Template = Name; 915 return Result; 916 } 917 918 NameClassificationKind getKind() const { return Kind; } 919 920 ParsedType getType() const { 921 assert(Kind == NC_Type); 922 return Type; 923 } 924 925 ExprResult getExpression() const { 926 assert(Kind == NC_Expression); 927 return Expr; 928 } 929 930 TemplateName getTemplateName() const { 931 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 932 return Template; 933 } 934 935 TemplateNameKind getTemplateNameKind() const { 936 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 937 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 938 } 939}; 940 941 /// \brief Perform name lookup on the given name, classifying it based on 942 /// the results of name lookup and the following token. 943 /// 944 /// This routine is used by the parser to resolve identifiers and help direct 945 /// parsing. When the identifier cannot be found, this routine will attempt 946 /// to correct the typo and classify based on the resulting name. 947 /// 948 /// \param S The scope in which we're performing name lookup. 949 /// 950 /// \param SS The nested-name-specifier that precedes the name. 951 /// 952 /// \param Name The identifier. If typo correction finds an alternative name, 953 /// this pointer parameter will be updated accordingly. 954 /// 955 /// \param NameLoc The location of the identifier. 956 /// 957 /// \param NextToken The token following the identifier. Used to help 958 /// disambiguate the name. 959 NameClassification ClassifyName(Scope *S, 960 CXXScopeSpec &SS, 961 IdentifierInfo *&Name, 962 SourceLocation NameLoc, 963 const Token &NextToken); 964 965 Decl *ActOnDeclarator(Scope *S, Declarator &D); 966 967 Decl *HandleDeclarator(Scope *S, Declarator &D, 968 MultiTemplateParamsArg TemplateParameterLists); 969 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 970 const LookupResult &Previous, 971 Scope *S); 972 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 973 void DiagnoseFunctionSpecifiers(Declarator& D); 974 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 975 void CheckShadow(Scope *S, VarDecl *D); 976 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 977 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 978 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 979 TypeSourceInfo *TInfo, 980 LookupResult &Previous); 981 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 982 LookupResult &Previous, bool &Redeclaration); 983 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 984 TypeSourceInfo *TInfo, 985 LookupResult &Previous, 986 MultiTemplateParamsArg TemplateParamLists); 987 // Returns true if the variable declaration is a redeclaration 988 bool CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous); 989 void CheckCompleteVariableDeclaration(VarDecl *var); 990 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 991 TypeSourceInfo *TInfo, 992 LookupResult &Previous, 993 MultiTemplateParamsArg TemplateParamLists, 994 bool &AddToScope); 995 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 996 997 /// \brief The kind of constexpr declaration checking we are performing. 998 /// 999 /// The kind affects which diagnostics (if any) are emitted if the function 1000 /// does not satisfy the requirements of a constexpr function declaration. 1001 enum CheckConstexprKind { 1002 /// \brief Check a constexpr function declaration, and produce errors if it 1003 /// does not satisfy the requirements. 1004 CCK_Declaration, 1005 /// \brief Check a constexpr function template instantiation. 1006 CCK_Instantiation, 1007 /// \brief Produce notes explaining why an instantiation was not constexpr. 1008 CCK_NoteNonConstexprInstantiation 1009 }; 1010 bool CheckConstexprFunctionDecl(const FunctionDecl *FD, 1011 CheckConstexprKind CCK); 1012 bool CheckConstexprFunctionBody(const FunctionDecl *FD, Stmt *Body); 1013 1014 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1015 // Returns true if the function declaration is a redeclaration 1016 bool CheckFunctionDeclaration(Scope *S, 1017 FunctionDecl *NewFD, LookupResult &Previous, 1018 bool IsExplicitSpecialization); 1019 void CheckMain(FunctionDecl *FD, const DeclSpec &D); 1020 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1021 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1022 SourceLocation Loc, 1023 QualType T); 1024 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1025 SourceLocation NameLoc, IdentifierInfo *Name, 1026 QualType T, TypeSourceInfo *TSInfo, 1027 StorageClass SC, StorageClass SCAsWritten); 1028 void ActOnParamDefaultArgument(Decl *param, 1029 SourceLocation EqualLoc, 1030 Expr *defarg); 1031 void ActOnParamUnparsedDefaultArgument(Decl *param, 1032 SourceLocation EqualLoc, 1033 SourceLocation ArgLoc); 1034 void ActOnParamDefaultArgumentError(Decl *param); 1035 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1036 SourceLocation EqualLoc); 1037 1038 void CheckSelfReference(Decl *OrigDecl, Expr *E); 1039 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1040 bool TypeMayContainAuto); 1041 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1042 void ActOnInitializerError(Decl *Dcl); 1043 void ActOnCXXForRangeDecl(Decl *D); 1044 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1045 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1046 void FinalizeDeclaration(Decl *D); 1047 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1048 Decl **Group, 1049 unsigned NumDecls); 1050 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1051 bool TypeMayContainAuto = true); 1052 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1053 SourceLocation LocAfterDecls); 1054 void CheckForFunctionRedefinition(FunctionDecl *FD); 1055 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1056 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1057 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1058 1059 void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope); 1060 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1061 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1062 1063 /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an 1064 /// attribute for which parsing is delayed. 1065 void ActOnFinishDelayedAttribute(Scope *S, Decl *D, ParsedAttributes &Attrs); 1066 1067 /// \brief Diagnose any unused parameters in the given sequence of 1068 /// ParmVarDecl pointers. 1069 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1070 ParmVarDecl * const *End); 1071 1072 /// \brief Diagnose whether the size of parameters or return value of a 1073 /// function or obj-c method definition is pass-by-value and larger than a 1074 /// specified threshold. 1075 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1076 ParmVarDecl * const *End, 1077 QualType ReturnTy, 1078 NamedDecl *D); 1079 1080 void DiagnoseInvalidJumps(Stmt *Body); 1081 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1082 SourceLocation AsmLoc, 1083 SourceLocation RParenLoc); 1084 1085 /// \brief The parser has processed a module import declaration. 1086 /// 1087 /// \param AtLoc The location of the '@' symbol, if any. 1088 /// 1089 /// \param ImportLoc The location of the 'import' keyword. 1090 /// 1091 /// \param Path The module access path. 1092 DeclResult ActOnModuleImport(SourceLocation AtLoc, SourceLocation ImportLoc, 1093 ModuleIdPath Path); 1094 1095 /// \brief Retrieve a suitable printing policy. 1096 PrintingPolicy getPrintingPolicy() const { 1097 return getPrintingPolicy(Context, PP); 1098 } 1099 1100 /// \brief Retrieve a suitable printing policy. 1101 static PrintingPolicy getPrintingPolicy(const ASTContext &Ctx, 1102 const Preprocessor &PP); 1103 1104 /// Scope actions. 1105 void ActOnPopScope(SourceLocation Loc, Scope *S); 1106 void ActOnTranslationUnitScope(Scope *S); 1107 1108 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1109 DeclSpec &DS); 1110 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1111 DeclSpec &DS, 1112 MultiTemplateParamsArg TemplateParams); 1113 1114 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1115 AccessSpecifier AS, 1116 RecordDecl *Record); 1117 1118 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1119 RecordDecl *Record); 1120 1121 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1122 TagTypeKind NewTag, bool isDefinition, 1123 SourceLocation NewTagLoc, 1124 const IdentifierInfo &Name); 1125 1126 enum TagUseKind { 1127 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1128 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1129 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1130 TUK_Friend // Friend declaration: 'friend struct foo;' 1131 }; 1132 1133 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1134 SourceLocation KWLoc, CXXScopeSpec &SS, 1135 IdentifierInfo *Name, SourceLocation NameLoc, 1136 AttributeList *Attr, AccessSpecifier AS, 1137 SourceLocation ModulePrivateLoc, 1138 MultiTemplateParamsArg TemplateParameterLists, 1139 bool &OwnedDecl, bool &IsDependent, 1140 SourceLocation ScopedEnumKWLoc, 1141 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1142 1143 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1144 unsigned TagSpec, SourceLocation TagLoc, 1145 CXXScopeSpec &SS, 1146 IdentifierInfo *Name, SourceLocation NameLoc, 1147 AttributeList *Attr, 1148 MultiTemplateParamsArg TempParamLists); 1149 1150 TypeResult ActOnDependentTag(Scope *S, 1151 unsigned TagSpec, 1152 TagUseKind TUK, 1153 const CXXScopeSpec &SS, 1154 IdentifierInfo *Name, 1155 SourceLocation TagLoc, 1156 SourceLocation NameLoc); 1157 1158 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1159 IdentifierInfo *ClassName, 1160 SmallVectorImpl<Decl *> &Decls); 1161 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1162 Declarator &D, Expr *BitfieldWidth); 1163 1164 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1165 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1166 AccessSpecifier AS); 1167 1168 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1169 TypeSourceInfo *TInfo, 1170 RecordDecl *Record, SourceLocation Loc, 1171 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1172 SourceLocation TSSL, 1173 AccessSpecifier AS, NamedDecl *PrevDecl, 1174 Declarator *D = 0); 1175 1176 enum CXXSpecialMember { 1177 CXXDefaultConstructor, 1178 CXXCopyConstructor, 1179 CXXMoveConstructor, 1180 CXXCopyAssignment, 1181 CXXMoveAssignment, 1182 CXXDestructor, 1183 CXXInvalid 1184 }; 1185 bool CheckNontrivialField(FieldDecl *FD); 1186 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1187 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1188 void ActOnLastBitfield(SourceLocation DeclStart, 1189 SmallVectorImpl<Decl *> &AllIvarDecls); 1190 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, 1191 Declarator &D, Expr *BitfieldWidth, 1192 tok::ObjCKeywordKind visibility); 1193 1194 // This is used for both record definitions and ObjC interface declarations. 1195 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1196 llvm::ArrayRef<Decl *> Fields, 1197 SourceLocation LBrac, SourceLocation RBrac, 1198 AttributeList *AttrList); 1199 1200 /// ActOnTagStartDefinition - Invoked when we have entered the 1201 /// scope of a tag's definition (e.g., for an enumeration, class, 1202 /// struct, or union). 1203 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1204 1205 Decl *ActOnObjCContainerStartDefinition(Decl *IDecl); 1206 1207 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1208 /// C++ record definition's base-specifiers clause and are starting its 1209 /// member declarations. 1210 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1211 SourceLocation FinalLoc, 1212 SourceLocation LBraceLoc); 1213 1214 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1215 /// the definition of a tag (enumeration, class, struct, or union). 1216 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1217 SourceLocation RBraceLoc); 1218 1219 void ActOnObjCContainerFinishDefinition(); 1220 1221 /// \brief Invoked when we must temporarily exit the objective-c container 1222 /// scope for parsing/looking-up C constructs. 1223 /// 1224 /// Must be followed by a call to \see ActOnObjCReenterContainerContext 1225 void ActOnObjCTemporaryExitContainerContext(DeclContext *DC); 1226 void ActOnObjCReenterContainerContext(DeclContext *DC); 1227 1228 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1229 /// error parsing the definition of a tag. 1230 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1231 1232 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1233 EnumConstantDecl *LastEnumConst, 1234 SourceLocation IdLoc, 1235 IdentifierInfo *Id, 1236 Expr *val); 1237 1238 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1239 SourceLocation IdLoc, IdentifierInfo *Id, 1240 AttributeList *Attrs, 1241 SourceLocation EqualLoc, Expr *Val); 1242 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1243 SourceLocation RBraceLoc, Decl *EnumDecl, 1244 Decl **Elements, unsigned NumElements, 1245 Scope *S, AttributeList *Attr); 1246 1247 DeclContext *getContainingDC(DeclContext *DC); 1248 1249 /// Set the current declaration context until it gets popped. 1250 void PushDeclContext(Scope *S, DeclContext *DC); 1251 void PopDeclContext(); 1252 1253 /// EnterDeclaratorContext - Used when we must lookup names in the context 1254 /// of a declarator's nested name specifier. 1255 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1256 void ExitDeclaratorContext(Scope *S); 1257 1258 /// Push the parameters of D, which must be a function, into scope. 1259 void ActOnReenterFunctionContext(Scope* S, Decl* D); 1260 void ActOnExitFunctionContext() { PopDeclContext(); } 1261 1262 DeclContext *getFunctionLevelDeclContext(); 1263 1264 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1265 /// to the function decl for the function being parsed. If we're currently 1266 /// in a 'block', this returns the containing context. 1267 FunctionDecl *getCurFunctionDecl(); 1268 1269 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1270 /// the method decl for the method being parsed. If we're currently 1271 /// in a 'block', this returns the containing context. 1272 ObjCMethodDecl *getCurMethodDecl(); 1273 1274 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1275 /// or C function we're in, otherwise return null. If we're currently 1276 /// in a 'block', this returns the containing context. 1277 NamedDecl *getCurFunctionOrMethodDecl(); 1278 1279 /// Add this decl to the scope shadowed decl chains. 1280 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1281 1282 /// \brief Make the given externally-produced declaration visible at the 1283 /// top level scope. 1284 /// 1285 /// \param D The externally-produced declaration to push. 1286 /// 1287 /// \param Name The name of the externally-produced declaration. 1288 void pushExternalDeclIntoScope(NamedDecl *D, DeclarationName Name); 1289 1290 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1291 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1292 /// true if 'D' belongs to the given declaration context. 1293 /// 1294 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1295 /// whether the declaration is in scope for the purposes of explicit template 1296 /// instantiation or specialization. The default is false. 1297 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1298 bool ExplicitInstantiationOrSpecialization = false); 1299 1300 /// Finds the scope corresponding to the given decl context, if it 1301 /// happens to be an enclosing scope. Otherwise return NULL. 1302 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1303 1304 /// Subroutines of ActOnDeclarator(). 1305 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1306 TypeSourceInfo *TInfo); 1307 bool isIncompatibleTypedef(TypeDecl *Old, TypedefNameDecl *New); 1308 void mergeDeclAttributes(Decl *New, Decl *Old, bool MergeDeprecation = true); 1309 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1310 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1311 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1312 void mergeObjCMethodDecls(ObjCMethodDecl *New, ObjCMethodDecl *Old); 1313 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1314 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1315 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1316 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1317 1318 // AssignmentAction - This is used by all the assignment diagnostic functions 1319 // to represent what is actually causing the operation 1320 enum AssignmentAction { 1321 AA_Assigning, 1322 AA_Passing, 1323 AA_Returning, 1324 AA_Converting, 1325 AA_Initializing, 1326 AA_Sending, 1327 AA_Casting 1328 }; 1329 1330 /// C++ Overloading. 1331 enum OverloadKind { 1332 /// This is a legitimate overload: the existing declarations are 1333 /// functions or function templates with different signatures. 1334 Ovl_Overload, 1335 1336 /// This is not an overload because the signature exactly matches 1337 /// an existing declaration. 1338 Ovl_Match, 1339 1340 /// This is not an overload because the lookup results contain a 1341 /// non-function. 1342 Ovl_NonFunction 1343 }; 1344 OverloadKind CheckOverload(Scope *S, 1345 FunctionDecl *New, 1346 const LookupResult &OldDecls, 1347 NamedDecl *&OldDecl, 1348 bool IsForUsingDecl); 1349 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1350 1351 /// \brief Checks availability of the function depending on the current 1352 /// function context.Inside an unavailable function,unavailability is ignored. 1353 /// 1354 /// \returns true if \arg FD is unavailable and current context is inside 1355 /// an available function, false otherwise. 1356 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1357 1358 ImplicitConversionSequence 1359 TryImplicitConversion(Expr *From, QualType ToType, 1360 bool SuppressUserConversions, 1361 bool AllowExplicit, 1362 bool InOverloadResolution, 1363 bool CStyle, 1364 bool AllowObjCWritebackConversion); 1365 1366 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1367 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1368 bool IsComplexPromotion(QualType FromType, QualType ToType); 1369 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1370 bool InOverloadResolution, 1371 QualType& ConvertedType, bool &IncompatibleObjC); 1372 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1373 QualType& ConvertedType, bool &IncompatibleObjC); 1374 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1375 QualType &ConvertedType); 1376 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1377 QualType& ConvertedType); 1378 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1379 const FunctionProtoType *NewType, 1380 unsigned *ArgPos = 0); 1381 void HandleFunctionTypeMismatch(PartialDiagnostic &PDiag, 1382 QualType FromType, QualType ToType); 1383 1384 CastKind PrepareCastToObjCObjectPointer(ExprResult &E); 1385 bool CheckPointerConversion(Expr *From, QualType ToType, 1386 CastKind &Kind, 1387 CXXCastPath& BasePath, 1388 bool IgnoreBaseAccess); 1389 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1390 bool InOverloadResolution, 1391 QualType &ConvertedType); 1392 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1393 CastKind &Kind, 1394 CXXCastPath &BasePath, 1395 bool IgnoreBaseAccess); 1396 bool IsQualificationConversion(QualType FromType, QualType ToType, 1397 bool CStyle, bool &ObjCLifetimeConversion); 1398 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1399 QualType &ResultTy); 1400 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1401 1402 1403 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1404 const VarDecl *NRVOCandidate, 1405 QualType ResultType, 1406 Expr *Value, 1407 bool AllowNRVO = true); 1408 1409 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1410 ExprResult Init); 1411 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1412 SourceLocation EqualLoc, 1413 ExprResult Init, 1414 bool TopLevelOfInitList = false); 1415 ExprResult PerformObjectArgumentInitialization(Expr *From, 1416 NestedNameSpecifier *Qualifier, 1417 NamedDecl *FoundDecl, 1418 CXXMethodDecl *Method); 1419 1420 ExprResult PerformContextuallyConvertToBool(Expr *From); 1421 ExprResult PerformContextuallyConvertToObjCPointer(Expr *From); 1422 1423 /// Contexts in which a converted constant expression is required. 1424 enum CCEKind { 1425 CCEK_CaseValue, ///< Expression in a case label. 1426 CCEK_Enumerator, ///< Enumerator value with fixed underlying type. 1427 CCEK_TemplateArg ///< Value of a non-type template parameter. 1428 }; 1429 ExprResult CheckConvertedConstantExpression(Expr *From, QualType T, 1430 llvm::APSInt &Value, CCEKind CCE); 1431 1432 ExprResult 1433 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1434 const PartialDiagnostic &NotIntDiag, 1435 const PartialDiagnostic &IncompleteDiag, 1436 const PartialDiagnostic &ExplicitConvDiag, 1437 const PartialDiagnostic &ExplicitConvNote, 1438 const PartialDiagnostic &AmbigDiag, 1439 const PartialDiagnostic &AmbigNote, 1440 const PartialDiagnostic &ConvDiag); 1441 1442 ExprResult PerformObjectMemberConversion(Expr *From, 1443 NestedNameSpecifier *Qualifier, 1444 NamedDecl *FoundDecl, 1445 NamedDecl *Member); 1446 1447 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1448 // TODO: make this is a typesafe union. 1449 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1450 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1451 1452 void AddOverloadCandidate(NamedDecl *Function, 1453 DeclAccessPair FoundDecl, 1454 Expr **Args, unsigned NumArgs, 1455 OverloadCandidateSet &CandidateSet); 1456 1457 void AddOverloadCandidate(FunctionDecl *Function, 1458 DeclAccessPair FoundDecl, 1459 Expr **Args, unsigned NumArgs, 1460 OverloadCandidateSet& CandidateSet, 1461 bool SuppressUserConversions = false, 1462 bool PartialOverloading = false); 1463 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1464 Expr **Args, unsigned NumArgs, 1465 OverloadCandidateSet& CandidateSet, 1466 bool SuppressUserConversions = false); 1467 void AddMethodCandidate(DeclAccessPair FoundDecl, 1468 QualType ObjectType, 1469 Expr::Classification ObjectClassification, 1470 Expr **Args, unsigned NumArgs, 1471 OverloadCandidateSet& CandidateSet, 1472 bool SuppressUserConversion = false); 1473 void AddMethodCandidate(CXXMethodDecl *Method, 1474 DeclAccessPair FoundDecl, 1475 CXXRecordDecl *ActingContext, QualType ObjectType, 1476 Expr::Classification ObjectClassification, 1477 Expr **Args, unsigned NumArgs, 1478 OverloadCandidateSet& CandidateSet, 1479 bool SuppressUserConversions = false); 1480 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1481 DeclAccessPair FoundDecl, 1482 CXXRecordDecl *ActingContext, 1483 TemplateArgumentListInfo *ExplicitTemplateArgs, 1484 QualType ObjectType, 1485 Expr::Classification ObjectClassification, 1486 Expr **Args, unsigned NumArgs, 1487 OverloadCandidateSet& CandidateSet, 1488 bool SuppressUserConversions = false); 1489 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1490 DeclAccessPair FoundDecl, 1491 TemplateArgumentListInfo *ExplicitTemplateArgs, 1492 Expr **Args, unsigned NumArgs, 1493 OverloadCandidateSet& CandidateSet, 1494 bool SuppressUserConversions = false); 1495 void AddConversionCandidate(CXXConversionDecl *Conversion, 1496 DeclAccessPair FoundDecl, 1497 CXXRecordDecl *ActingContext, 1498 Expr *From, QualType ToType, 1499 OverloadCandidateSet& CandidateSet); 1500 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1501 DeclAccessPair FoundDecl, 1502 CXXRecordDecl *ActingContext, 1503 Expr *From, QualType ToType, 1504 OverloadCandidateSet &CandidateSet); 1505 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1506 DeclAccessPair FoundDecl, 1507 CXXRecordDecl *ActingContext, 1508 const FunctionProtoType *Proto, 1509 Expr *Object, Expr **Args, unsigned NumArgs, 1510 OverloadCandidateSet& CandidateSet); 1511 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1512 SourceLocation OpLoc, 1513 Expr **Args, unsigned NumArgs, 1514 OverloadCandidateSet& CandidateSet, 1515 SourceRange OpRange = SourceRange()); 1516 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1517 Expr **Args, unsigned NumArgs, 1518 OverloadCandidateSet& CandidateSet, 1519 bool IsAssignmentOperator = false, 1520 unsigned NumContextualBoolArguments = 0); 1521 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1522 SourceLocation OpLoc, 1523 Expr **Args, unsigned NumArgs, 1524 OverloadCandidateSet& CandidateSet); 1525 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1526 bool Operator, 1527 Expr **Args, unsigned NumArgs, 1528 TemplateArgumentListInfo *ExplicitTemplateArgs, 1529 OverloadCandidateSet& CandidateSet, 1530 bool PartialOverloading = false, 1531 bool StdNamespaceIsAssociated = false); 1532 1533 // Emit as a 'note' the specific overload candidate 1534 void NoteOverloadCandidate(FunctionDecl *Fn, QualType DestType = QualType()); 1535 1536 // Emit as a series of 'note's all template and non-templates 1537 // identified by the expression Expr 1538 void NoteAllOverloadCandidates(Expr* E, QualType DestType = QualType()); 1539 1540 // [PossiblyAFunctionType] --> [Return] 1541 // NonFunctionType --> NonFunctionType 1542 // R (A) --> R(A) 1543 // R (*)(A) --> R (A) 1544 // R (&)(A) --> R (A) 1545 // R (S::*)(A) --> R (A) 1546 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1547 1548 FunctionDecl * 1549 ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, 1550 QualType TargetType, 1551 bool Complain, 1552 DeclAccessPair &Found, 1553 bool *pHadMultipleCandidates = 0); 1554 1555 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1556 bool Complain = false, 1557 DeclAccessPair* Found = 0); 1558 1559 bool ResolveAndFixSingleFunctionTemplateSpecialization( 1560 ExprResult &SrcExpr, 1561 bool DoFunctionPointerConverion = false, 1562 bool Complain = false, 1563 const SourceRange& OpRangeForComplaining = SourceRange(), 1564 QualType DestTypeForComplaining = QualType(), 1565 unsigned DiagIDForComplaining = 0); 1566 1567 1568 Expr *FixOverloadedFunctionReference(Expr *E, 1569 DeclAccessPair FoundDecl, 1570 FunctionDecl *Fn); 1571 ExprResult FixOverloadedFunctionReference(ExprResult, 1572 DeclAccessPair FoundDecl, 1573 FunctionDecl *Fn); 1574 1575 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1576 Expr **Args, unsigned NumArgs, 1577 OverloadCandidateSet &CandidateSet, 1578 bool PartialOverloading = false); 1579 1580 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1581 UnresolvedLookupExpr *ULE, 1582 SourceLocation LParenLoc, 1583 Expr **Args, unsigned NumArgs, 1584 SourceLocation RParenLoc, 1585 Expr *ExecConfig); 1586 1587 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1588 unsigned Opc, 1589 const UnresolvedSetImpl &Fns, 1590 Expr *input); 1591 1592 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1593 unsigned Opc, 1594 const UnresolvedSetImpl &Fns, 1595 Expr *LHS, Expr *RHS); 1596 1597 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1598 SourceLocation RLoc, 1599 Expr *Base,Expr *Idx); 1600 1601 ExprResult 1602 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1603 SourceLocation LParenLoc, Expr **Args, 1604 unsigned NumArgs, SourceLocation RParenLoc); 1605 ExprResult 1606 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1607 Expr **Args, unsigned NumArgs, 1608 SourceLocation RParenLoc); 1609 1610 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1611 SourceLocation OpLoc); 1612 1613 /// CheckCallReturnType - Checks that a call expression's return type is 1614 /// complete. Returns true on failure. The location passed in is the location 1615 /// that best represents the call. 1616 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1617 CallExpr *CE, FunctionDecl *FD); 1618 1619 /// Helpers for dealing with blocks and functions. 1620 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1621 bool CheckParameterNames); 1622 void CheckCXXDefaultArguments(FunctionDecl *FD); 1623 void CheckExtraCXXDefaultArguments(Declarator &D); 1624 Scope *getNonFieldDeclScope(Scope *S); 1625 1626 /// \name Name lookup 1627 /// 1628 /// These routines provide name lookup that is used during semantic 1629 /// analysis to resolve the various kinds of names (identifiers, 1630 /// overloaded operator names, constructor names, etc.) into zero or 1631 /// more declarations within a particular scope. The major entry 1632 /// points are LookupName, which performs unqualified name lookup, 1633 /// and LookupQualifiedName, which performs qualified name lookup. 1634 /// 1635 /// All name lookup is performed based on some specific criteria, 1636 /// which specify what names will be visible to name lookup and how 1637 /// far name lookup should work. These criteria are important both 1638 /// for capturing language semantics (certain lookups will ignore 1639 /// certain names, for example) and for performance, since name 1640 /// lookup is often a bottleneck in the compilation of C++. Name 1641 /// lookup criteria is specified via the LookupCriteria enumeration. 1642 /// 1643 /// The results of name lookup can vary based on the kind of name 1644 /// lookup performed, the current language, and the translation 1645 /// unit. In C, for example, name lookup will either return nothing 1646 /// (no entity found) or a single declaration. In C++, name lookup 1647 /// can additionally refer to a set of overloaded functions or 1648 /// result in an ambiguity. All of the possible results of name 1649 /// lookup are captured by the LookupResult class, which provides 1650 /// the ability to distinguish among them. 1651 //@{ 1652 1653 /// @brief Describes the kind of name lookup to perform. 1654 enum LookupNameKind { 1655 /// Ordinary name lookup, which finds ordinary names (functions, 1656 /// variables, typedefs, etc.) in C and most kinds of names 1657 /// (functions, variables, members, types, etc.) in C++. 1658 LookupOrdinaryName = 0, 1659 /// Tag name lookup, which finds the names of enums, classes, 1660 /// structs, and unions. 1661 LookupTagName, 1662 /// Label name lookup. 1663 LookupLabel, 1664 /// Member name lookup, which finds the names of 1665 /// class/struct/union members. 1666 LookupMemberName, 1667 /// Look up of an operator name (e.g., operator+) for use with 1668 /// operator overloading. This lookup is similar to ordinary name 1669 /// lookup, but will ignore any declarations that are class members. 1670 LookupOperatorName, 1671 /// Look up of a name that precedes the '::' scope resolution 1672 /// operator in C++. This lookup completely ignores operator, object, 1673 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1674 LookupNestedNameSpecifierName, 1675 /// Look up a namespace name within a C++ using directive or 1676 /// namespace alias definition, ignoring non-namespace names (C++ 1677 /// [basic.lookup.udir]p1). 1678 LookupNamespaceName, 1679 /// Look up all declarations in a scope with the given name, 1680 /// including resolved using declarations. This is appropriate 1681 /// for checking redeclarations for a using declaration. 1682 LookupUsingDeclName, 1683 /// Look up an ordinary name that is going to be redeclared as a 1684 /// name with linkage. This lookup ignores any declarations that 1685 /// are outside of the current scope unless they have linkage. See 1686 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1687 LookupRedeclarationWithLinkage, 1688 /// Look up the name of an Objective-C protocol. 1689 LookupObjCProtocolName, 1690 /// Look up implicit 'self' parameter of an objective-c method. 1691 LookupObjCImplicitSelfParam, 1692 /// \brief Look up any declaration with any name. 1693 LookupAnyName 1694 }; 1695 1696 /// \brief Specifies whether (or how) name lookup is being performed for a 1697 /// redeclaration (vs. a reference). 1698 enum RedeclarationKind { 1699 /// \brief The lookup is a reference to this name that is not for the 1700 /// purpose of redeclaring the name. 1701 NotForRedeclaration = 0, 1702 /// \brief The lookup results will be used for redeclaration of a name, 1703 /// if an entity by that name already exists. 1704 ForRedeclaration 1705 }; 1706 1707private: 1708 bool CppLookupName(LookupResult &R, Scope *S); 1709 1710 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1711 CXXSpecialMember SM, 1712 bool ConstArg, 1713 bool VolatileArg, 1714 bool RValueThis, 1715 bool ConstThis, 1716 bool VolatileThis); 1717 1718 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1719 // 1720 // The boolean value will be true to indicate that the namespace was loaded 1721 // from an AST/PCH file, or false otherwise. 1722 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1723 1724 /// \brief Whether we have already loaded known namespaces from an extenal 1725 /// source. 1726 bool LoadedExternalKnownNamespaces; 1727 1728public: 1729 /// \brief Look up a name, looking for a single declaration. Return 1730 /// null if the results were absent, ambiguous, or overloaded. 1731 /// 1732 /// It is preferable to use the elaborated form and explicitly handle 1733 /// ambiguity and overloaded. 1734 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1735 SourceLocation Loc, 1736 LookupNameKind NameKind, 1737 RedeclarationKind Redecl 1738 = NotForRedeclaration); 1739 bool LookupName(LookupResult &R, Scope *S, 1740 bool AllowBuiltinCreation = false); 1741 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1742 bool InUnqualifiedLookup = false); 1743 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1744 bool AllowBuiltinCreation = false, 1745 bool EnteringContext = false); 1746 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc, 1747 RedeclarationKind Redecl 1748 = NotForRedeclaration); 1749 1750 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1751 QualType T1, QualType T2, 1752 UnresolvedSetImpl &Functions); 1753 1754 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1755 SourceLocation GnuLabelLoc = SourceLocation()); 1756 1757 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1758 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1759 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1760 unsigned Quals, 1761 bool *ConstParam = 0); 1762 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1763 bool RValueThis, unsigned ThisQuals, 1764 bool *ConstParam = 0); 1765 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class); 1766 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, bool RValueThis, 1767 unsigned ThisQuals); 1768 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1769 1770 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1771 Expr **Args, unsigned NumArgs, 1772 ADLResult &Functions, 1773 bool StdNamespaceIsAssociated = false); 1774 1775 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1776 VisibleDeclConsumer &Consumer, 1777 bool IncludeGlobalScope = true); 1778 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1779 VisibleDeclConsumer &Consumer, 1780 bool IncludeGlobalScope = true); 1781 1782 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1783 Sema::LookupNameKind LookupKind, 1784 Scope *S, CXXScopeSpec *SS, 1785 CorrectionCandidateCallback *CCC, 1786 DeclContext *MemberContext = 0, 1787 bool EnteringContext = false, 1788 const ObjCObjectPointerType *OPT = 0); 1789 1790 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1791 AssociatedNamespaceSet &AssociatedNamespaces, 1792 AssociatedClassSet &AssociatedClasses); 1793 1794 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1795 bool ConsiderLinkage, 1796 bool ExplicitInstantiationOrSpecialization); 1797 1798 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1799 //@} 1800 1801 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1802 SourceLocation IdLoc, 1803 bool TypoCorrection = false); 1804 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1805 Scope *S, bool ForRedeclaration, 1806 SourceLocation Loc); 1807 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1808 Scope *S); 1809 void AddKnownFunctionAttributes(FunctionDecl *FD); 1810 1811 // More parsing and symbol table subroutines. 1812 1813 // Decl attributes - this routine is the top level dispatcher. 1814 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1815 bool NonInheritable = true, bool Inheritable = true); 1816 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1817 bool NonInheritable = true, bool Inheritable = true); 1818 bool ProcessAccessDeclAttributeList(AccessSpecDecl *ASDecl, 1819 const AttributeList *AttrList); 1820 1821 void checkUnusedDeclAttributes(Declarator &D); 1822 1823 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1824 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1825 bool CheckNoReturnAttr(const AttributeList &attr); 1826 1827 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1828 bool &IncompleteImpl, unsigned DiagID); 1829 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 1830 ObjCMethodDecl *MethodDecl, 1831 bool IsProtocolMethodDecl); 1832 1833 void CheckConflictingOverridingMethod(ObjCMethodDecl *Method, 1834 ObjCMethodDecl *Overridden, 1835 bool IsProtocolMethodDecl); 1836 1837 /// WarnExactTypedMethods - This routine issues a warning if method 1838 /// implementation declaration matches exactly that of its declaration. 1839 void WarnExactTypedMethods(ObjCMethodDecl *Method, 1840 ObjCMethodDecl *MethodDecl, 1841 bool IsProtocolMethodDecl); 1842 1843 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1844 ObjCInterfaceDecl *IDecl); 1845 1846 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1847 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap; 1848 1849 /// CheckProtocolMethodDefs - This routine checks unimplemented 1850 /// methods declared in protocol, and those referenced by it. 1851 /// \param IDecl - Used for checking for methods which may have been 1852 /// inherited. 1853 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1854 ObjCProtocolDecl *PDecl, 1855 bool& IncompleteImpl, 1856 const SelectorSet &InsMap, 1857 const SelectorSet &ClsMap, 1858 ObjCContainerDecl *CDecl); 1859 1860 /// CheckImplementationIvars - This routine checks if the instance variables 1861 /// listed in the implelementation match those listed in the interface. 1862 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1863 ObjCIvarDecl **Fields, unsigned nIvars, 1864 SourceLocation Loc); 1865 1866 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1867 /// remains unimplemented in the class or category @implementation. 1868 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1869 ObjCContainerDecl* IDecl, 1870 bool IncompleteImpl = false); 1871 1872 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1873 /// which must be implemented by this implementation. 1874 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1875 ObjCContainerDecl *CDecl, 1876 const SelectorSet &InsMap); 1877 1878 /// DefaultSynthesizeProperties - This routine default synthesizes all 1879 /// properties which must be synthesized in class's @implementation. 1880 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1881 ObjCInterfaceDecl *IDecl); 1882 void DefaultSynthesizeProperties(Scope *S, Decl *D); 1883 1884 /// CollectImmediateProperties - This routine collects all properties in 1885 /// the class and its conforming protocols; but not those it its super class. 1886 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1887 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1888 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1889 1890 1891 /// LookupPropertyDecl - Looks up a property in the current class and all 1892 /// its protocols. 1893 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1894 IdentifierInfo *II); 1895 1896 /// Called by ActOnProperty to handle @property declarations in 1897 //// class extensions. 1898 Decl *HandlePropertyInClassExtension(Scope *S, 1899 SourceLocation AtLoc, 1900 FieldDeclarator &FD, 1901 Selector GetterSel, 1902 Selector SetterSel, 1903 const bool isAssign, 1904 const bool isReadWrite, 1905 const unsigned Attributes, 1906 const unsigned AttributesAsWritten, 1907 bool *isOverridingProperty, 1908 TypeSourceInfo *T, 1909 tok::ObjCKeywordKind MethodImplKind); 1910 1911 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1912 /// handle creating the ObjcPropertyDecl for a category or @interface. 1913 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1914 ObjCContainerDecl *CDecl, 1915 SourceLocation AtLoc, 1916 FieldDeclarator &FD, 1917 Selector GetterSel, 1918 Selector SetterSel, 1919 const bool isAssign, 1920 const bool isReadWrite, 1921 const unsigned Attributes, 1922 const unsigned AttributesAsWritten, 1923 TypeSourceInfo *T, 1924 tok::ObjCKeywordKind MethodImplKind, 1925 DeclContext *lexicalDC = 0); 1926 1927 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1928 /// warning) when atomic property has one but not the other user-declared 1929 /// setter or getter. 1930 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1931 ObjCContainerDecl* IDecl); 1932 1933 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 1934 1935 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1936 1937 enum MethodMatchStrategy { 1938 MMS_loose, 1939 MMS_strict 1940 }; 1941 1942 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1943 /// true, or false, accordingly. 1944 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1945 const ObjCMethodDecl *PrevMethod, 1946 MethodMatchStrategy strategy = MMS_strict); 1947 1948 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1949 /// or protocol against those declared in their implementations. 1950 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1951 const SelectorSet &ClsMap, 1952 SelectorSet &InsMapSeen, 1953 SelectorSet &ClsMapSeen, 1954 ObjCImplDecl* IMPDecl, 1955 ObjCContainerDecl* IDecl, 1956 bool &IncompleteImpl, 1957 bool ImmediateClass, 1958 bool WarnExactMatch=false); 1959 1960 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in 1961 /// category matches with those implemented in its primary class and 1962 /// warns each time an exact match is found. 1963 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP); 1964 1965private: 1966 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1967 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1968 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1969 1970 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1971 /// optionally warns if there are multiple signatures. 1972 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1973 bool receiverIdOrClass, 1974 bool warn, bool instance); 1975 1976public: 1977 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1978 /// unit are added to a global pool. This allows us to efficiently associate 1979 /// a selector with a method declaraation for purposes of typechecking 1980 /// messages sent to "id" (where the class of the object is unknown). 1981 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1982 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1983 } 1984 1985 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1986 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1987 AddMethodToGlobalPool(Method, impl, /*instance*/false); 1988 } 1989 1990 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global 1991 /// pool. 1992 void AddAnyMethodToGlobalPool(Decl *D); 1993 1994 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 1995 /// there are multiple signatures. 1996 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 1997 bool receiverIdOrClass=false, 1998 bool warn=true) { 1999 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2000 warn, /*instance*/true); 2001 } 2002 2003 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 2004 /// there are multiple signatures. 2005 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 2006 bool receiverIdOrClass=false, 2007 bool warn=true) { 2008 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2009 warn, /*instance*/false); 2010 } 2011 2012 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 2013 /// implementation. 2014 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 2015 2016 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 2017 /// initialization. 2018 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 2019 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 2020 2021 //===--------------------------------------------------------------------===// 2022 // Statement Parsing Callbacks: SemaStmt.cpp. 2023public: 2024 class FullExprArg { 2025 public: 2026 FullExprArg(Sema &actions) : E(0) { } 2027 2028 // FIXME: The const_cast here is ugly. RValue references would make this 2029 // much nicer (or we could duplicate a bunch of the move semantics 2030 // emulation code from Ownership.h). 2031 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 2032 2033 ExprResult release() { 2034 return move(E); 2035 } 2036 2037 Expr *get() const { return E; } 2038 2039 Expr *operator->() { 2040 return E; 2041 } 2042 2043 private: 2044 // FIXME: No need to make the entire Sema class a friend when it's just 2045 // Sema::MakeFullExpr that needs access to the constructor below. 2046 friend class Sema; 2047 2048 explicit FullExprArg(Expr *expr) : E(expr) {} 2049 2050 Expr *E; 2051 }; 2052 2053 FullExprArg MakeFullExpr(Expr *Arg) { 2054 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 2055 } 2056 2057 StmtResult ActOnExprStmt(FullExprArg Expr); 2058 2059 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 2060 bool HasLeadingEmptyMacro = false); 2061 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 2062 MultiStmtArg Elts, 2063 bool isStmtExpr); 2064 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2065 SourceLocation StartLoc, 2066 SourceLocation EndLoc); 2067 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2068 StmtResult ActOnForEachLValueExpr(Expr *E); 2069 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2070 SourceLocation DotDotDotLoc, Expr *RHSVal, 2071 SourceLocation ColonLoc); 2072 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2073 2074 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2075 SourceLocation ColonLoc, 2076 Stmt *SubStmt, Scope *CurScope); 2077 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2078 SourceLocation ColonLoc, Stmt *SubStmt); 2079 2080 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2081 FullExprArg CondVal, Decl *CondVar, 2082 Stmt *ThenVal, 2083 SourceLocation ElseLoc, Stmt *ElseVal); 2084 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2085 Expr *Cond, 2086 Decl *CondVar); 2087 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2088 Stmt *Switch, Stmt *Body); 2089 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2090 FullExprArg Cond, 2091 Decl *CondVar, Stmt *Body); 2092 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2093 SourceLocation WhileLoc, 2094 SourceLocation CondLParen, Expr *Cond, 2095 SourceLocation CondRParen); 2096 2097 StmtResult ActOnForStmt(SourceLocation ForLoc, 2098 SourceLocation LParenLoc, 2099 Stmt *First, FullExprArg Second, 2100 Decl *SecondVar, 2101 FullExprArg Third, 2102 SourceLocation RParenLoc, 2103 Stmt *Body); 2104 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc, 2105 Expr *collection); 2106 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2107 SourceLocation LParenLoc, 2108 Stmt *First, Expr *Second, 2109 SourceLocation RParenLoc, Stmt *Body); 2110 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2111 SourceLocation LParenLoc, Stmt *LoopVar, 2112 SourceLocation ColonLoc, Expr *Collection, 2113 SourceLocation RParenLoc); 2114 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2115 SourceLocation ColonLoc, 2116 Stmt *RangeDecl, Stmt *BeginEndDecl, 2117 Expr *Cond, Expr *Inc, 2118 Stmt *LoopVarDecl, 2119 SourceLocation RParenLoc); 2120 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2121 2122 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2123 SourceLocation LabelLoc, 2124 LabelDecl *TheDecl); 2125 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2126 SourceLocation StarLoc, 2127 Expr *DestExp); 2128 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2129 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2130 2131 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2132 bool AllowFunctionParameters); 2133 2134 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2135 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2136 2137 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2138 bool IsSimple, bool IsVolatile, 2139 unsigned NumOutputs, unsigned NumInputs, 2140 IdentifierInfo **Names, 2141 MultiExprArg Constraints, 2142 MultiExprArg Exprs, 2143 Expr *AsmString, 2144 MultiExprArg Clobbers, 2145 SourceLocation RParenLoc, 2146 bool MSAsm = false); 2147 2148 2149 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2150 SourceLocation StartLoc, 2151 SourceLocation IdLoc, IdentifierInfo *Id, 2152 bool Invalid = false); 2153 2154 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2155 2156 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2157 Decl *Parm, Stmt *Body); 2158 2159 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2160 2161 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2162 MultiStmtArg Catch, Stmt *Finally); 2163 2164 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2165 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2166 Scope *CurScope); 2167 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, 2168 Expr *operand); 2169 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2170 Expr *SynchExpr, 2171 Stmt *SynchBody); 2172 2173 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2174 2175 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2176 SourceLocation StartLoc, 2177 SourceLocation IdLoc, 2178 IdentifierInfo *Id); 2179 2180 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2181 2182 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2183 Decl *ExDecl, Stmt *HandlerBlock); 2184 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2185 MultiStmtArg Handlers); 2186 2187 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2188 SourceLocation TryLoc, 2189 Stmt *TryBlock, 2190 Stmt *Handler); 2191 2192 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2193 Expr *FilterExpr, 2194 Stmt *Block); 2195 2196 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2197 Stmt *Block); 2198 2199 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2200 2201 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2202 2203 /// \brief If it's a file scoped decl that must warn if not used, keep track 2204 /// of it. 2205 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2206 2207 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2208 /// whose result is unused, warn. 2209 void DiagnoseUnusedExprResult(const Stmt *S); 2210 void DiagnoseUnusedDecl(const NamedDecl *ND); 2211 2212 ParsingDeclState PushParsingDeclaration() { 2213 return DelayedDiagnostics.pushParsingDecl(); 2214 } 2215 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2216 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2217 } 2218 2219 typedef ProcessingContextState ParsingClassState; 2220 ParsingClassState PushParsingClass() { 2221 return DelayedDiagnostics.pushContext(); 2222 } 2223 void PopParsingClass(ParsingClassState state) { 2224 DelayedDiagnostics.popContext(state); 2225 } 2226 2227 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2228 SourceLocation Loc, 2229 const ObjCInterfaceDecl *UnknownObjCClass=0); 2230 2231 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2232 2233 bool makeUnavailableInSystemHeader(SourceLocation loc, 2234 StringRef message); 2235 2236 //===--------------------------------------------------------------------===// 2237 // Expression Parsing Callbacks: SemaExpr.cpp. 2238 2239 bool CanUseDecl(NamedDecl *D); 2240 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2241 const ObjCInterfaceDecl *UnknownObjCClass=0); 2242 AvailabilityResult DiagnoseAvailabilityOfDecl(NamedDecl *D, 2243 SourceLocation Loc, 2244 const ObjCInterfaceDecl *UnknownObjCClass); 2245 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2246 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2247 ObjCMethodDecl *Getter, 2248 SourceLocation Loc); 2249 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2250 Expr **Args, unsigned NumArgs); 2251 2252 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 2253 2254 void PopExpressionEvaluationContext(); 2255 2256 void DiscardCleanupsInEvaluationContext(); 2257 2258 ExprResult TranformToPotentiallyEvaluated(Expr *E); 2259 ExprResult HandleExprEvaluationContextForTypeof(Expr *E); 2260 2261 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 2262 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2263 void MarkDeclarationsReferencedInExpr(Expr *E); 2264 2265 /// \brief Try to recover by turning the given expression into a 2266 /// call. Returns true if recovery was attempted or an error was 2267 /// emitted; this may also leave the ExprResult invalid. 2268 bool tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD, 2269 bool ForceComplain = false, 2270 bool (*IsPlausibleResult)(QualType) = 0); 2271 2272 /// \brief Figure out if an expression could be turned into a call. 2273 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2274 UnresolvedSetImpl &NonTemplateOverloads); 2275 2276 /// \brief Conditionally issue a diagnostic based on the current 2277 /// evaluation context. 2278 /// 2279 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2280 /// the function body is parsed, and then do a basic reachability analysis to 2281 /// determine if the statement is reachable. If it is unreachable, the 2282 /// diagnostic will not be emitted. 2283 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement, 2284 const PartialDiagnostic &PD); 2285 2286 // Primary Expressions. 2287 SourceRange getExprRange(Expr *E) const; 2288 2289 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Id, 2290 bool HasTrailingLParen, bool IsAddressOfOperand); 2291 2292 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2293 TemplateArgumentListInfo &Buffer, 2294 DeclarationNameInfo &NameInfo, 2295 const TemplateArgumentListInfo *&TemplateArgs); 2296 2297 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2298 CorrectionCandidateCallback &CCC, 2299 TemplateArgumentListInfo *ExplicitTemplateArgs = 0, 2300 Expr **Args = 0, unsigned NumArgs = 0); 2301 2302 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S, 2303 IdentifierInfo *II, 2304 bool AllowBuiltinCreation=false); 2305 2306 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2307 const DeclarationNameInfo &NameInfo, 2308 bool isAddressOfOperand, 2309 const TemplateArgumentListInfo *TemplateArgs); 2310 2311 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2312 ExprValueKind VK, 2313 SourceLocation Loc, 2314 const CXXScopeSpec *SS = 0); 2315 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2316 ExprValueKind VK, 2317 const DeclarationNameInfo &NameInfo, 2318 const CXXScopeSpec *SS = 0); 2319 ExprResult 2320 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2321 SourceLocation nameLoc, 2322 IndirectFieldDecl *indirectField, 2323 Expr *baseObjectExpr = 0, 2324 SourceLocation opLoc = SourceLocation()); 2325 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2326 LookupResult &R, 2327 const TemplateArgumentListInfo *TemplateArgs); 2328 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2329 LookupResult &R, 2330 const TemplateArgumentListInfo *TemplateArgs, 2331 bool IsDefiniteInstance); 2332 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2333 const LookupResult &R, 2334 bool HasTrailingLParen); 2335 2336 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2337 const DeclarationNameInfo &NameInfo); 2338 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2339 const DeclarationNameInfo &NameInfo, 2340 const TemplateArgumentListInfo *TemplateArgs); 2341 2342 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2343 LookupResult &R, 2344 bool NeedsADL); 2345 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2346 const DeclarationNameInfo &NameInfo, 2347 NamedDecl *D); 2348 2349 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2350 ExprResult ActOnNumericConstant(const Token &Tok); 2351 ExprResult ActOnCharacterConstant(const Token &Tok); 2352 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E); 2353 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2354 SourceLocation R, 2355 MultiExprArg Val); 2356 2357 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2358 /// fragments (e.g. "foo" "bar" L"baz"). 2359 ExprResult ActOnStringLiteral(const Token *StringToks, 2360 unsigned NumStringToks); 2361 2362 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2363 SourceLocation DefaultLoc, 2364 SourceLocation RParenLoc, 2365 Expr *ControllingExpr, 2366 MultiTypeArg ArgTypes, 2367 MultiExprArg ArgExprs); 2368 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2369 SourceLocation DefaultLoc, 2370 SourceLocation RParenLoc, 2371 Expr *ControllingExpr, 2372 TypeSourceInfo **Types, 2373 Expr **Exprs, 2374 unsigned NumAssocs); 2375 2376 // Binary/Unary Operators. 'Tok' is the token for the operator. 2377 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2378 Expr *InputExpr); 2379 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2380 UnaryOperatorKind Opc, Expr *Input); 2381 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2382 tok::TokenKind Op, Expr *Input); 2383 2384 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo, 2385 SourceLocation OpLoc, 2386 UnaryExprOrTypeTrait ExprKind, 2387 SourceRange R); 2388 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2389 UnaryExprOrTypeTrait ExprKind); 2390 ExprResult 2391 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2392 UnaryExprOrTypeTrait ExprKind, 2393 bool IsType, void *TyOrEx, 2394 const SourceRange &ArgRange); 2395 2396 ExprResult CheckPlaceholderExpr(Expr *E); 2397 bool CheckVecStepExpr(Expr *E); 2398 2399 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2400 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc, 2401 SourceRange ExprRange, 2402 UnaryExprOrTypeTrait ExprKind); 2403 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2404 SourceLocation OpLoc, 2405 IdentifierInfo &Name, 2406 SourceLocation NameLoc, 2407 SourceLocation RParenLoc); 2408 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2409 tok::TokenKind Kind, Expr *Input); 2410 2411 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2412 Expr *Idx, SourceLocation RLoc); 2413 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2414 Expr *Idx, SourceLocation RLoc); 2415 2416 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2417 SourceLocation OpLoc, bool IsArrow, 2418 CXXScopeSpec &SS, 2419 NamedDecl *FirstQualifierInScope, 2420 const DeclarationNameInfo &NameInfo, 2421 const TemplateArgumentListInfo *TemplateArgs); 2422 2423 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2424 SourceLocation OpLoc, bool IsArrow, 2425 const CXXScopeSpec &SS, 2426 NamedDecl *FirstQualifierInScope, 2427 LookupResult &R, 2428 const TemplateArgumentListInfo *TemplateArgs, 2429 bool SuppressQualifierCheck = false); 2430 2431 ExprResult PerformMemberExprBaseConversion(Expr *Base, bool IsArrow); 2432 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2433 bool &IsArrow, SourceLocation OpLoc, 2434 CXXScopeSpec &SS, 2435 Decl *ObjCImpDecl, 2436 bool HasTemplateArgs); 2437 2438 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2439 const CXXScopeSpec &SS, 2440 const LookupResult &R); 2441 2442 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2443 bool IsArrow, SourceLocation OpLoc, 2444 const CXXScopeSpec &SS, 2445 NamedDecl *FirstQualifierInScope, 2446 const DeclarationNameInfo &NameInfo, 2447 const TemplateArgumentListInfo *TemplateArgs); 2448 2449 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2450 SourceLocation OpLoc, 2451 tok::TokenKind OpKind, 2452 CXXScopeSpec &SS, 2453 UnqualifiedId &Member, 2454 Decl *ObjCImpDecl, 2455 bool HasTrailingLParen); 2456 2457 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2458 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2459 FunctionDecl *FDecl, 2460 const FunctionProtoType *Proto, 2461 Expr **Args, unsigned NumArgs, 2462 SourceLocation RParenLoc, 2463 bool ExecConfig = false); 2464 void CheckStaticArrayArgument(SourceLocation CallLoc, 2465 ParmVarDecl *Param, 2466 const Expr *ArgExpr); 2467 2468 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2469 /// This provides the location of the left/right parens and a list of comma 2470 /// locations. 2471 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2472 MultiExprArg ArgExprs, SourceLocation RParenLoc, 2473 Expr *ExecConfig = 0, bool IsExecConfig = false); 2474 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2475 SourceLocation LParenLoc, 2476 Expr **Args, unsigned NumArgs, 2477 SourceLocation RParenLoc, 2478 Expr *Config = 0, 2479 bool IsExecConfig = false); 2480 2481 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2482 MultiExprArg ExecConfig, 2483 SourceLocation GGGLoc); 2484 2485 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2486 Declarator &D, ParsedType &Ty, 2487 SourceLocation RParenLoc, Expr *CastExpr); 2488 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2489 TypeSourceInfo *Ty, 2490 SourceLocation RParenLoc, 2491 Expr *Op); 2492 CastKind PrepareScalarCast(ExprResult &src, QualType destType); 2493 2494 /// \brief Build an altivec or OpenCL literal. 2495 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2496 SourceLocation RParenLoc, Expr *E, 2497 TypeSourceInfo *TInfo); 2498 2499 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2500 2501 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2502 ParsedType Ty, 2503 SourceLocation RParenLoc, 2504 Expr *InitExpr); 2505 2506 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2507 TypeSourceInfo *TInfo, 2508 SourceLocation RParenLoc, 2509 Expr *LiteralExpr); 2510 2511 ExprResult ActOnInitList(SourceLocation LBraceLoc, 2512 MultiExprArg InitArgList, 2513 SourceLocation RBraceLoc); 2514 2515 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2516 SourceLocation Loc, 2517 bool GNUSyntax, 2518 ExprResult Init); 2519 2520 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2521 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr); 2522 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2523 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr); 2524 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc, 2525 Expr *LHSExpr, Expr *RHSExpr); 2526 2527 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2528 /// in the case of a the GNU conditional expr extension. 2529 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2530 SourceLocation ColonLoc, 2531 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr); 2532 2533 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2534 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2535 LabelDecl *TheDecl); 2536 2537 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2538 SourceLocation RPLoc); // "({..})" 2539 2540 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2541 struct OffsetOfComponent { 2542 SourceLocation LocStart, LocEnd; 2543 bool isBrackets; // true if [expr], false if .ident 2544 union { 2545 IdentifierInfo *IdentInfo; 2546 Expr *E; 2547 } U; 2548 }; 2549 2550 /// __builtin_offsetof(type, a.b[123][456].c) 2551 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2552 TypeSourceInfo *TInfo, 2553 OffsetOfComponent *CompPtr, 2554 unsigned NumComponents, 2555 SourceLocation RParenLoc); 2556 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2557 SourceLocation BuiltinLoc, 2558 SourceLocation TypeLoc, 2559 ParsedType ParsedArgTy, 2560 OffsetOfComponent *CompPtr, 2561 unsigned NumComponents, 2562 SourceLocation RParenLoc); 2563 2564 // __builtin_choose_expr(constExpr, expr1, expr2) 2565 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2566 Expr *CondExpr, Expr *LHSExpr, 2567 Expr *RHSExpr, SourceLocation RPLoc); 2568 2569 // __builtin_va_arg(expr, type) 2570 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, 2571 SourceLocation RPLoc); 2572 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E, 2573 TypeSourceInfo *TInfo, SourceLocation RPLoc); 2574 2575 // __null 2576 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2577 2578 bool CheckCaseExpression(Expr *E); 2579 2580 /// \brief Describes the result of an "if-exists" condition check. 2581 enum IfExistsResult { 2582 /// \brief The symbol exists. 2583 IER_Exists, 2584 2585 /// \brief The symbol does not exist. 2586 IER_DoesNotExist, 2587 2588 /// \brief The name is a dependent name, so the results will differ 2589 /// from one instantiation to the next. 2590 IER_Dependent, 2591 2592 /// \brief An error occurred. 2593 IER_Error 2594 }; 2595 2596 IfExistsResult 2597 CheckMicrosoftIfExistsSymbol(Scope *S, CXXScopeSpec &SS, 2598 const DeclarationNameInfo &TargetNameInfo); 2599 2600 IfExistsResult 2601 CheckMicrosoftIfExistsSymbol(Scope *S, SourceLocation KeywordLoc, 2602 bool IsIfExists, CXXScopeSpec &SS, 2603 UnqualifiedId &Name); 2604 2605 StmtResult BuildMSDependentExistsStmt(SourceLocation KeywordLoc, 2606 bool IsIfExists, 2607 NestedNameSpecifierLoc QualifierLoc, 2608 DeclarationNameInfo NameInfo, 2609 Stmt *Nested); 2610 StmtResult ActOnMSDependentExistsStmt(SourceLocation KeywordLoc, 2611 bool IsIfExists, 2612 CXXScopeSpec &SS, UnqualifiedId &Name, 2613 Stmt *Nested); 2614 2615 //===------------------------- "Block" Extension ------------------------===// 2616 2617 /// ActOnBlockStart - This callback is invoked when a block literal is 2618 /// started. 2619 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2620 2621 /// ActOnBlockArguments - This callback allows processing of block arguments. 2622 /// If there are no arguments, this is still invoked. 2623 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2624 2625 /// ActOnBlockError - If there is an error parsing a block, this callback 2626 /// is invoked to pop the information about the block from the action impl. 2627 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2628 2629 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2630 /// literal was successfully completed. ^(int x){...} 2631 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body, 2632 Scope *CurScope); 2633 2634 //===---------------------------- OpenCL Features -----------------------===// 2635 2636 /// __builtin_astype(...) 2637 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, 2638 SourceLocation BuiltinLoc, 2639 SourceLocation RParenLoc); 2640 2641 //===---------------------------- C++ Features --------------------------===// 2642 2643 // Act on C++ namespaces 2644 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2645 SourceLocation NamespaceLoc, 2646 SourceLocation IdentLoc, 2647 IdentifierInfo *Ident, 2648 SourceLocation LBrace, 2649 AttributeList *AttrList); 2650 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2651 2652 NamespaceDecl *getStdNamespace() const; 2653 NamespaceDecl *getOrCreateStdNamespace(); 2654 2655 CXXRecordDecl *getStdBadAlloc() const; 2656 2657 /// \brief Tests whether Ty is an instance of std::initializer_list and, if 2658 /// it is and Element is not NULL, assigns the element type to Element. 2659 bool isStdInitializerList(QualType Ty, QualType *Element); 2660 2661 /// \brief Looks for the std::initializer_list template and instantiates it 2662 /// with Element, or emits an error if it's not found. 2663 /// 2664 /// \returns The instantiated template, or null on error. 2665 QualType BuildStdInitializerList(QualType Element, SourceLocation Loc); 2666 2667 /// \brief Determine whether Ctor is an initializer-list constructor, as 2668 /// defined in [dcl.init.list]p2. 2669 bool isInitListConstructor(const CXXConstructorDecl *Ctor); 2670 2671 Decl *ActOnUsingDirective(Scope *CurScope, 2672 SourceLocation UsingLoc, 2673 SourceLocation NamespcLoc, 2674 CXXScopeSpec &SS, 2675 SourceLocation IdentLoc, 2676 IdentifierInfo *NamespcName, 2677 AttributeList *AttrList); 2678 2679 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2680 2681 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2682 SourceLocation NamespaceLoc, 2683 SourceLocation AliasLoc, 2684 IdentifierInfo *Alias, 2685 CXXScopeSpec &SS, 2686 SourceLocation IdentLoc, 2687 IdentifierInfo *Ident); 2688 2689 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2690 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2691 const LookupResult &PreviousDecls); 2692 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2693 NamedDecl *Target); 2694 2695 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2696 bool isTypeName, 2697 const CXXScopeSpec &SS, 2698 SourceLocation NameLoc, 2699 const LookupResult &Previous); 2700 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2701 const CXXScopeSpec &SS, 2702 SourceLocation NameLoc); 2703 2704 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2705 SourceLocation UsingLoc, 2706 CXXScopeSpec &SS, 2707 const DeclarationNameInfo &NameInfo, 2708 AttributeList *AttrList, 2709 bool IsInstantiation, 2710 bool IsTypeName, 2711 SourceLocation TypenameLoc); 2712 2713 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2714 2715 Decl *ActOnUsingDeclaration(Scope *CurScope, 2716 AccessSpecifier AS, 2717 bool HasUsingKeyword, 2718 SourceLocation UsingLoc, 2719 CXXScopeSpec &SS, 2720 UnqualifiedId &Name, 2721 AttributeList *AttrList, 2722 bool IsTypeName, 2723 SourceLocation TypenameLoc); 2724 Decl *ActOnAliasDeclaration(Scope *CurScope, 2725 AccessSpecifier AS, 2726 MultiTemplateParamsArg TemplateParams, 2727 SourceLocation UsingLoc, 2728 UnqualifiedId &Name, 2729 TypeResult Type); 2730 2731 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2732 /// ActOnDeclarator, when a C++ direct initializer is present. 2733 /// e.g: "int x(1);" 2734 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2735 SourceLocation LParenLoc, 2736 MultiExprArg Exprs, 2737 SourceLocation RParenLoc, 2738 bool TypeMayContainAuto); 2739 2740 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2741 /// and sets it as the initializer for the the passed in VarDecl. 2742 bool InitializeVarWithConstructor(VarDecl *VD, 2743 CXXConstructorDecl *Constructor, 2744 MultiExprArg Exprs, 2745 bool HadMultipleCandidates); 2746 2747 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2748 /// including handling of its default argument expressions. 2749 /// 2750 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2751 ExprResult 2752 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2753 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2754 bool HadMultipleCandidates, bool RequiresZeroInit, 2755 unsigned ConstructKind, SourceRange ParenRange); 2756 2757 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2758 // the constructor can be elidable? 2759 ExprResult 2760 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2761 CXXConstructorDecl *Constructor, bool Elidable, 2762 MultiExprArg Exprs, bool HadMultipleCandidates, 2763 bool RequiresZeroInit, unsigned ConstructKind, 2764 SourceRange ParenRange); 2765 2766 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2767 /// the default expr if needed. 2768 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2769 FunctionDecl *FD, 2770 ParmVarDecl *Param); 2771 2772 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2773 /// constructed variable. 2774 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2775 2776 /// \brief Helper class that collects exception specifications for 2777 /// implicitly-declared special member functions. 2778 class ImplicitExceptionSpecification { 2779 // Pointer to allow copying 2780 ASTContext *Context; 2781 // We order exception specifications thus: 2782 // noexcept is the most restrictive, but is only used in C++0x. 2783 // throw() comes next. 2784 // Then a throw(collected exceptions) 2785 // Finally no specification. 2786 // throw(...) is used instead if any called function uses it. 2787 // 2788 // If this exception specification cannot be known yet (for instance, 2789 // because this is the exception specification for a defaulted default 2790 // constructor and we haven't finished parsing the deferred parts of the 2791 // class yet), the C++0x standard does not specify how to behave. We 2792 // record this as an 'unknown' exception specification, which overrules 2793 // any other specification (even 'none', to keep this rule simple). 2794 ExceptionSpecificationType ComputedEST; 2795 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2796 SmallVector<QualType, 4> Exceptions; 2797 2798 void ClearExceptions() { 2799 ExceptionsSeen.clear(); 2800 Exceptions.clear(); 2801 } 2802 2803 public: 2804 explicit ImplicitExceptionSpecification(ASTContext &Context) 2805 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2806 if (!Context.getLangOptions().CPlusPlus0x) 2807 ComputedEST = EST_DynamicNone; 2808 } 2809 2810 /// \brief Get the computed exception specification type. 2811 ExceptionSpecificationType getExceptionSpecType() const { 2812 assert(ComputedEST != EST_ComputedNoexcept && 2813 "noexcept(expr) should not be a possible result"); 2814 return ComputedEST; 2815 } 2816 2817 /// \brief The number of exceptions in the exception specification. 2818 unsigned size() const { return Exceptions.size(); } 2819 2820 /// \brief The set of exceptions in the exception specification. 2821 const QualType *data() const { return Exceptions.data(); } 2822 2823 /// \brief Integrate another called method into the collected data. 2824 void CalledDecl(CXXMethodDecl *Method); 2825 2826 /// \brief Integrate an invoked expression into the collected data. 2827 void CalledExpr(Expr *E); 2828 2829 /// \brief Specify that the exception specification can't be detemined yet. 2830 void SetDelayed() { 2831 ClearExceptions(); 2832 ComputedEST = EST_Delayed; 2833 } 2834 2835 FunctionProtoType::ExtProtoInfo getEPI() const { 2836 FunctionProtoType::ExtProtoInfo EPI; 2837 EPI.ExceptionSpecType = getExceptionSpecType(); 2838 EPI.NumExceptions = size(); 2839 EPI.Exceptions = data(); 2840 return EPI; 2841 } 2842 }; 2843 2844 /// \brief Determine what sort of exception specification a defaulted 2845 /// copy constructor of a class will have. 2846 ImplicitExceptionSpecification 2847 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2848 2849 /// \brief Determine what sort of exception specification a defaulted 2850 /// default constructor of a class will have, and whether the parameter 2851 /// will be const. 2852 std::pair<ImplicitExceptionSpecification, bool> 2853 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2854 2855 /// \brief Determine what sort of exception specification a defautled 2856 /// copy assignment operator of a class will have, and whether the 2857 /// parameter will be const. 2858 std::pair<ImplicitExceptionSpecification, bool> 2859 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2860 2861 /// \brief Determine what sort of exception specification a defaulted move 2862 /// constructor of a class will have. 2863 ImplicitExceptionSpecification 2864 ComputeDefaultedMoveCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2865 2866 /// \brief Determine what sort of exception specification a defaulted move 2867 /// assignment operator of a class will have. 2868 ImplicitExceptionSpecification 2869 ComputeDefaultedMoveAssignmentExceptionSpec(CXXRecordDecl *ClassDecl); 2870 2871 /// \brief Determine what sort of exception specification a defaulted 2872 /// destructor of a class will have. 2873 ImplicitExceptionSpecification 2874 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 2875 2876 /// \brief Determine if a special member function should have a deleted 2877 /// definition when it is defaulted. 2878 bool ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM); 2879 2880 /// \brief Determine if a defaulted copy assignment operator ought to be 2881 /// deleted. 2882 bool ShouldDeleteCopyAssignmentOperator(CXXMethodDecl *MD); 2883 2884 /// \brief Determine if a defaulted move assignment operator ought to be 2885 /// deleted. 2886 bool ShouldDeleteMoveAssignmentOperator(CXXMethodDecl *MD); 2887 2888 /// \brief Determine if a defaulted destructor ought to be deleted. 2889 bool ShouldDeleteDestructor(CXXDestructorDecl *DD); 2890 2891 /// \brief Declare the implicit default constructor for the given class. 2892 /// 2893 /// \param ClassDecl The class declaration into which the implicit 2894 /// default constructor will be added. 2895 /// 2896 /// \returns The implicitly-declared default constructor. 2897 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2898 CXXRecordDecl *ClassDecl); 2899 2900 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2901 /// defining this constructor as the default constructor. 2902 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2903 CXXConstructorDecl *Constructor); 2904 2905 /// \brief Declare the implicit destructor for the given class. 2906 /// 2907 /// \param ClassDecl The class declaration into which the implicit 2908 /// destructor will be added. 2909 /// 2910 /// \returns The implicitly-declared destructor. 2911 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2912 2913 /// DefineImplicitDestructor - Checks for feasibility of 2914 /// defining this destructor as the default destructor. 2915 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2916 CXXDestructorDecl *Destructor); 2917 2918 /// \brief Build an exception spec for destructors that don't have one. 2919 /// 2920 /// C++11 says that user-defined destructors with no exception spec get one 2921 /// that looks as if the destructor was implicitly declared. 2922 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 2923 CXXDestructorDecl *Destructor); 2924 2925 /// \brief Declare all inherited constructors for the given class. 2926 /// 2927 /// \param ClassDecl The class declaration into which the inherited 2928 /// constructors will be added. 2929 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2930 2931 /// \brief Declare the implicit copy constructor for the given class. 2932 /// 2933 /// \param ClassDecl The class declaration into which the implicit 2934 /// copy constructor will be added. 2935 /// 2936 /// \returns The implicitly-declared copy constructor. 2937 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2938 2939 /// DefineImplicitCopyConstructor - Checks for feasibility of 2940 /// defining this constructor as the copy constructor. 2941 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2942 CXXConstructorDecl *Constructor); 2943 2944 /// \brief Declare the implicit move constructor for the given class. 2945 /// 2946 /// \param ClassDecl The Class declaration into which the implicit 2947 /// move constructor will be added. 2948 /// 2949 /// \returns The implicitly-declared move constructor, or NULL if it wasn't 2950 /// declared. 2951 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl); 2952 2953 /// DefineImplicitMoveConstructor - Checks for feasibility of 2954 /// defining this constructor as the move constructor. 2955 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation, 2956 CXXConstructorDecl *Constructor); 2957 2958 /// \brief Declare the implicit copy assignment operator for the given class. 2959 /// 2960 /// \param ClassDecl The class declaration into which the implicit 2961 /// copy assignment operator will be added. 2962 /// 2963 /// \returns The implicitly-declared copy assignment operator. 2964 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2965 2966 /// \brief Defines an implicitly-declared copy assignment operator. 2967 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2968 CXXMethodDecl *MethodDecl); 2969 2970 /// \brief Declare the implicit move assignment operator for the given class. 2971 /// 2972 /// \param ClassDecl The Class declaration into which the implicit 2973 /// move assignment operator will be added. 2974 /// 2975 /// \returns The implicitly-declared move assignment operator, or NULL if it 2976 /// wasn't declared. 2977 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl); 2978 2979 /// \brief Defines an implicitly-declared move assignment operator. 2980 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation, 2981 CXXMethodDecl *MethodDecl); 2982 2983 /// \brief Force the declaration of any implicitly-declared members of this 2984 /// class. 2985 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2986 2987 /// MaybeBindToTemporary - If the passed in expression has a record type with 2988 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 2989 /// it simply returns the passed in expression. 2990 ExprResult MaybeBindToTemporary(Expr *E); 2991 2992 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 2993 MultiExprArg ArgsPtr, 2994 SourceLocation Loc, 2995 ASTOwningVector<Expr*> &ConvertedArgs); 2996 2997 ParsedType getDestructorName(SourceLocation TildeLoc, 2998 IdentifierInfo &II, SourceLocation NameLoc, 2999 Scope *S, CXXScopeSpec &SS, 3000 ParsedType ObjectType, 3001 bool EnteringContext); 3002 3003 ParsedType getDestructorType(const DeclSpec& DS, ParsedType ObjectType); 3004 3005 // Checks that reinterpret casts don't have undefined behavior. 3006 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 3007 bool IsDereference, SourceRange Range); 3008 3009 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 3010 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 3011 tok::TokenKind Kind, 3012 SourceLocation LAngleBracketLoc, 3013 Declarator &D, 3014 SourceLocation RAngleBracketLoc, 3015 SourceLocation LParenLoc, 3016 Expr *E, 3017 SourceLocation RParenLoc); 3018 3019 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 3020 tok::TokenKind Kind, 3021 TypeSourceInfo *Ty, 3022 Expr *E, 3023 SourceRange AngleBrackets, 3024 SourceRange Parens); 3025 3026 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3027 SourceLocation TypeidLoc, 3028 TypeSourceInfo *Operand, 3029 SourceLocation RParenLoc); 3030 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3031 SourceLocation TypeidLoc, 3032 Expr *Operand, 3033 SourceLocation RParenLoc); 3034 3035 /// ActOnCXXTypeid - Parse typeid( something ). 3036 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 3037 SourceLocation LParenLoc, bool isType, 3038 void *TyOrExpr, 3039 SourceLocation RParenLoc); 3040 3041 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3042 SourceLocation TypeidLoc, 3043 TypeSourceInfo *Operand, 3044 SourceLocation RParenLoc); 3045 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3046 SourceLocation TypeidLoc, 3047 Expr *Operand, 3048 SourceLocation RParenLoc); 3049 3050 /// ActOnCXXUuidof - Parse __uuidof( something ). 3051 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 3052 SourceLocation LParenLoc, bool isType, 3053 void *TyOrExpr, 3054 SourceLocation RParenLoc); 3055 3056 3057 //// ActOnCXXThis - Parse 'this' pointer. 3058 ExprResult ActOnCXXThis(SourceLocation loc); 3059 3060 /// \brief Try to retrieve the type of the 'this' pointer. 3061 /// 3062 /// \param Capture If true, capture 'this' in this context. 3063 /// 3064 /// \returns The type of 'this', if possible. Otherwise, returns a NULL type. 3065 QualType getCurrentThisType(); 3066 3067 /// \brief Make sure the value of 'this' is actually available in the current 3068 /// context, if it is a potentially evaluated context. 3069 void CheckCXXThisCapture(SourceLocation Loc); 3070 3071 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 3072 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 3073 3074 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 3075 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 3076 3077 //// ActOnCXXThrow - Parse throw expressions. 3078 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 3079 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 3080 bool IsThrownVarInScope); 3081 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 3082 bool IsThrownVarInScope); 3083 3084 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 3085 /// Can be interpreted either as function-style casting ("int(x)") 3086 /// or class type construction ("ClassType(x,y,z)") 3087 /// or creation of a value-initialized type ("int()"). 3088 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 3089 SourceLocation LParenLoc, 3090 MultiExprArg Exprs, 3091 SourceLocation RParenLoc); 3092 3093 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 3094 SourceLocation LParenLoc, 3095 MultiExprArg Exprs, 3096 SourceLocation RParenLoc); 3097 3098 /// ActOnCXXNew - Parsed a C++ 'new' expression. 3099 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 3100 SourceLocation PlacementLParen, 3101 MultiExprArg PlacementArgs, 3102 SourceLocation PlacementRParen, 3103 SourceRange TypeIdParens, Declarator &D, 3104 SourceLocation ConstructorLParen, 3105 MultiExprArg ConstructorArgs, 3106 SourceLocation ConstructorRParen); 3107 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 3108 SourceLocation PlacementLParen, 3109 MultiExprArg PlacementArgs, 3110 SourceLocation PlacementRParen, 3111 SourceRange TypeIdParens, 3112 QualType AllocType, 3113 TypeSourceInfo *AllocTypeInfo, 3114 Expr *ArraySize, 3115 SourceLocation ConstructorLParen, 3116 MultiExprArg ConstructorArgs, 3117 SourceLocation ConstructorRParen, 3118 bool TypeMayContainAuto = true); 3119 3120 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 3121 SourceRange R); 3122 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 3123 bool UseGlobal, QualType AllocType, bool IsArray, 3124 Expr **PlaceArgs, unsigned NumPlaceArgs, 3125 FunctionDecl *&OperatorNew, 3126 FunctionDecl *&OperatorDelete); 3127 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 3128 DeclarationName Name, Expr** Args, 3129 unsigned NumArgs, DeclContext *Ctx, 3130 bool AllowMissing, FunctionDecl *&Operator, 3131 bool Diagnose = true); 3132 void DeclareGlobalNewDelete(); 3133 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 3134 QualType Argument, 3135 bool addMallocAttr = false); 3136 3137 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 3138 DeclarationName Name, FunctionDecl* &Operator, 3139 bool Diagnose = true); 3140 3141 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 3142 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 3143 bool UseGlobal, bool ArrayForm, 3144 Expr *Operand); 3145 3146 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 3147 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 3148 SourceLocation StmtLoc, 3149 bool ConvertToBoolean); 3150 3151 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 3152 Expr *Operand, SourceLocation RParen); 3153 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 3154 SourceLocation RParen); 3155 3156 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 3157 /// pseudo-functions. 3158 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 3159 SourceLocation KWLoc, 3160 ParsedType Ty, 3161 SourceLocation RParen); 3162 3163 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3164 SourceLocation KWLoc, 3165 TypeSourceInfo *T, 3166 SourceLocation RParen); 3167 3168 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3169 /// pseudo-functions. 3170 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3171 SourceLocation KWLoc, 3172 ParsedType LhsTy, 3173 ParsedType RhsTy, 3174 SourceLocation RParen); 3175 3176 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3177 SourceLocation KWLoc, 3178 TypeSourceInfo *LhsT, 3179 TypeSourceInfo *RhsT, 3180 SourceLocation RParen); 3181 3182 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3183 /// pseudo-functions. 3184 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3185 SourceLocation KWLoc, 3186 ParsedType LhsTy, 3187 Expr *DimExpr, 3188 SourceLocation RParen); 3189 3190 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3191 SourceLocation KWLoc, 3192 TypeSourceInfo *TSInfo, 3193 Expr *DimExpr, 3194 SourceLocation RParen); 3195 3196 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3197 /// pseudo-functions. 3198 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3199 SourceLocation KWLoc, 3200 Expr *Queried, 3201 SourceLocation RParen); 3202 3203 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3204 SourceLocation KWLoc, 3205 Expr *Queried, 3206 SourceLocation RParen); 3207 3208 ExprResult ActOnStartCXXMemberReference(Scope *S, 3209 Expr *Base, 3210 SourceLocation OpLoc, 3211 tok::TokenKind OpKind, 3212 ParsedType &ObjectType, 3213 bool &MayBePseudoDestructor); 3214 3215 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3216 3217 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3218 SourceLocation OpLoc, 3219 tok::TokenKind OpKind, 3220 const CXXScopeSpec &SS, 3221 TypeSourceInfo *ScopeType, 3222 SourceLocation CCLoc, 3223 SourceLocation TildeLoc, 3224 PseudoDestructorTypeStorage DestroyedType, 3225 bool HasTrailingLParen); 3226 3227 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3228 SourceLocation OpLoc, 3229 tok::TokenKind OpKind, 3230 CXXScopeSpec &SS, 3231 UnqualifiedId &FirstTypeName, 3232 SourceLocation CCLoc, 3233 SourceLocation TildeLoc, 3234 UnqualifiedId &SecondTypeName, 3235 bool HasTrailingLParen); 3236 3237 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3238 SourceLocation OpLoc, 3239 tok::TokenKind OpKind, 3240 SourceLocation TildeLoc, 3241 const DeclSpec& DS, 3242 bool HasTrailingLParen); 3243 3244 /// MaybeCreateExprWithCleanups - If the current full-expression 3245 /// requires any cleanups, surround it with a ExprWithCleanups node. 3246 /// Otherwise, just returns the passed-in expression. 3247 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3248 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3249 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3250 3251 ExprResult ActOnFinishFullExpr(Expr *Expr); 3252 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3253 3254 // Marks SS invalid if it represents an incomplete type. 3255 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3256 3257 DeclContext *computeDeclContext(QualType T); 3258 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3259 bool EnteringContext = false); 3260 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3261 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3262 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3263 3264 /// \brief The parser has parsed a global nested-name-specifier '::'. 3265 /// 3266 /// \param S The scope in which this nested-name-specifier occurs. 3267 /// 3268 /// \param CCLoc The location of the '::'. 3269 /// 3270 /// \param SS The nested-name-specifier, which will be updated in-place 3271 /// to reflect the parsed nested-name-specifier. 3272 /// 3273 /// \returns true if an error occurred, false otherwise. 3274 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3275 CXXScopeSpec &SS); 3276 3277 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3278 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3279 3280 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3281 SourceLocation IdLoc, 3282 IdentifierInfo &II, 3283 ParsedType ObjectType); 3284 3285 bool BuildCXXNestedNameSpecifier(Scope *S, 3286 IdentifierInfo &Identifier, 3287 SourceLocation IdentifierLoc, 3288 SourceLocation CCLoc, 3289 QualType ObjectType, 3290 bool EnteringContext, 3291 CXXScopeSpec &SS, 3292 NamedDecl *ScopeLookupResult, 3293 bool ErrorRecoveryLookup); 3294 3295 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3296 /// 3297 /// \param S The scope in which this nested-name-specifier occurs. 3298 /// 3299 /// \param Identifier The identifier preceding the '::'. 3300 /// 3301 /// \param IdentifierLoc The location of the identifier. 3302 /// 3303 /// \param CCLoc The location of the '::'. 3304 /// 3305 /// \param ObjectType The type of the object, if we're parsing 3306 /// nested-name-specifier in a member access expression. 3307 /// 3308 /// \param EnteringContext Whether we're entering the context nominated by 3309 /// this nested-name-specifier. 3310 /// 3311 /// \param SS The nested-name-specifier, which is both an input 3312 /// parameter (the nested-name-specifier before this type) and an 3313 /// output parameter (containing the full nested-name-specifier, 3314 /// including this new type). 3315 /// 3316 /// \returns true if an error occurred, false otherwise. 3317 bool ActOnCXXNestedNameSpecifier(Scope *S, 3318 IdentifierInfo &Identifier, 3319 SourceLocation IdentifierLoc, 3320 SourceLocation CCLoc, 3321 ParsedType ObjectType, 3322 bool EnteringContext, 3323 CXXScopeSpec &SS); 3324 3325 bool ActOnCXXNestedNameSpecifierDecltype(CXXScopeSpec &SS, 3326 const DeclSpec &DS, 3327 SourceLocation ColonColonLoc); 3328 3329 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3330 IdentifierInfo &Identifier, 3331 SourceLocation IdentifierLoc, 3332 SourceLocation ColonLoc, 3333 ParsedType ObjectType, 3334 bool EnteringContext); 3335 3336 /// \brief The parser has parsed a nested-name-specifier 3337 /// 'template[opt] template-name < template-args >::'. 3338 /// 3339 /// \param S The scope in which this nested-name-specifier occurs. 3340 /// 3341 /// \param TemplateLoc The location of the 'template' keyword, if any. 3342 /// 3343 /// \param SS The nested-name-specifier, which is both an input 3344 /// parameter (the nested-name-specifier before this type) and an 3345 /// output parameter (containing the full nested-name-specifier, 3346 /// including this new type). 3347 /// 3348 /// \param TemplateLoc the location of the 'template' keyword, if any. 3349 /// \param TemplateName The template name. 3350 /// \param TemplateNameLoc The location of the template name. 3351 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3352 /// \param TemplateArgs The template arguments. 3353 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3354 /// \param CCLoc The location of the '::'. 3355 3356 /// \param EnteringContext Whether we're entering the context of the 3357 /// nested-name-specifier. 3358 /// 3359 /// 3360 /// \returns true if an error occurred, false otherwise. 3361 bool ActOnCXXNestedNameSpecifier(Scope *S, 3362 SourceLocation TemplateLoc, 3363 CXXScopeSpec &SS, 3364 TemplateTy Template, 3365 SourceLocation TemplateNameLoc, 3366 SourceLocation LAngleLoc, 3367 ASTTemplateArgsPtr TemplateArgs, 3368 SourceLocation RAngleLoc, 3369 SourceLocation CCLoc, 3370 bool EnteringContext); 3371 3372 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3373 /// that the parser can use later to reconstruct the given 3374 /// nested-name-specifier. 3375 /// 3376 /// \param SS A nested-name-specifier. 3377 /// 3378 /// \returns A pointer containing all of the information in the 3379 /// nested-name-specifier \p SS. 3380 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3381 3382 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3383 /// the nested-name-specifier structure. 3384 /// 3385 /// \param Annotation The annotation pointer, produced by 3386 /// \c SaveNestedNameSpecifierAnnotation(). 3387 /// 3388 /// \param AnnotationRange The source range corresponding to the annotation. 3389 /// 3390 /// \param SS The nested-name-specifier that will be updated with the contents 3391 /// of the annotation pointer. 3392 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3393 SourceRange AnnotationRange, 3394 CXXScopeSpec &SS); 3395 3396 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3397 3398 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3399 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3400 /// After this method is called, according to [C++ 3.4.3p3], names should be 3401 /// looked up in the declarator-id's scope, until the declarator is parsed and 3402 /// ActOnCXXExitDeclaratorScope is called. 3403 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3404 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3405 3406 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3407 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3408 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3409 /// Used to indicate that names should revert to being looked up in the 3410 /// defining scope. 3411 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3412 3413 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3414 /// initializer for the declaration 'Dcl'. 3415 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3416 /// static data member of class X, names should be looked up in the scope of 3417 /// class X. 3418 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3419 3420 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3421 /// initializer for the declaration 'Dcl'. 3422 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3423 3424 /// ActOnStartOfLambdaDefinition - This is called just before we start 3425 /// parsing the body of a lambda; it analyzes the explicit captures and 3426 /// arguments, and sets up various data-structures for the body of the 3427 /// lambda. 3428 void ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro, 3429 Declarator &ParamInfo, Scope *CurScope); 3430 3431 /// ActOnLambdaError - If there is an error parsing a lambda, this callback 3432 /// is invoked to pop the information about the lambda. 3433 void ActOnLambdaError(SourceLocation StartLoc, Scope *CurScope); 3434 3435 /// ActOnLambdaExpr - This is called when the body of a lambda expression 3436 /// was successfully completed. 3437 ExprResult ActOnLambdaExpr(SourceLocation StartLoc, Stmt *Body, 3438 Scope *CurScope); 3439 3440 // ParseObjCStringLiteral - Parse Objective-C string literals. 3441 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3442 Expr **Strings, 3443 unsigned NumStrings); 3444 3445 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3446 TypeSourceInfo *EncodedTypeInfo, 3447 SourceLocation RParenLoc); 3448 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3449 CXXMethodDecl *Method, 3450 bool HadMultipleCandidates); 3451 3452 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3453 SourceLocation EncodeLoc, 3454 SourceLocation LParenLoc, 3455 ParsedType Ty, 3456 SourceLocation RParenLoc); 3457 3458 // ParseObjCSelectorExpression - Build selector expression for @selector 3459 ExprResult ParseObjCSelectorExpression(Selector Sel, 3460 SourceLocation AtLoc, 3461 SourceLocation SelLoc, 3462 SourceLocation LParenLoc, 3463 SourceLocation RParenLoc); 3464 3465 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3466 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3467 SourceLocation AtLoc, 3468 SourceLocation ProtoLoc, 3469 SourceLocation LParenLoc, 3470 SourceLocation RParenLoc); 3471 3472 //===--------------------------------------------------------------------===// 3473 // C++ Declarations 3474 // 3475 Decl *ActOnStartLinkageSpecification(Scope *S, 3476 SourceLocation ExternLoc, 3477 SourceLocation LangLoc, 3478 StringRef Lang, 3479 SourceLocation LBraceLoc); 3480 Decl *ActOnFinishLinkageSpecification(Scope *S, 3481 Decl *LinkageSpec, 3482 SourceLocation RBraceLoc); 3483 3484 3485 //===--------------------------------------------------------------------===// 3486 // C++ Classes 3487 // 3488 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3489 const CXXScopeSpec *SS = 0); 3490 3491 bool ActOnAccessSpecifier(AccessSpecifier Access, 3492 SourceLocation ASLoc, 3493 SourceLocation ColonLoc, 3494 AttributeList *Attrs = 0); 3495 3496 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3497 Declarator &D, 3498 MultiTemplateParamsArg TemplateParameterLists, 3499 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3500 bool HasDeferredInit); 3501 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3502 Expr *Init); 3503 3504 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3505 Scope *S, 3506 CXXScopeSpec &SS, 3507 IdentifierInfo *MemberOrBase, 3508 ParsedType TemplateTypeTy, 3509 SourceLocation IdLoc, 3510 SourceLocation LParenLoc, 3511 Expr **Args, unsigned NumArgs, 3512 SourceLocation RParenLoc, 3513 SourceLocation EllipsisLoc); 3514 3515 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3516 Scope *S, 3517 CXXScopeSpec &SS, 3518 IdentifierInfo *MemberOrBase, 3519 ParsedType TemplateTypeTy, 3520 SourceLocation IdLoc, 3521 Expr *InitList, 3522 SourceLocation EllipsisLoc); 3523 3524 MemInitResult BuildMemInitializer(Decl *ConstructorD, 3525 Scope *S, 3526 CXXScopeSpec &SS, 3527 IdentifierInfo *MemberOrBase, 3528 ParsedType TemplateTypeTy, 3529 SourceLocation IdLoc, 3530 const MultiInitializer &Init, 3531 SourceLocation EllipsisLoc); 3532 3533 MemInitResult BuildMemberInitializer(ValueDecl *Member, 3534 const MultiInitializer &Args, 3535 SourceLocation IdLoc); 3536 3537 MemInitResult BuildBaseInitializer(QualType BaseType, 3538 TypeSourceInfo *BaseTInfo, 3539 const MultiInitializer &Args, 3540 CXXRecordDecl *ClassDecl, 3541 SourceLocation EllipsisLoc); 3542 3543 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3544 const MultiInitializer &Args, 3545 CXXRecordDecl *ClassDecl); 3546 3547 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3548 CXXCtorInitializer *Initializer); 3549 3550 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3551 CXXCtorInitializer **Initializers, 3552 unsigned NumInitializers, bool AnyErrors); 3553 3554 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3555 3556 3557 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3558 /// mark all the non-trivial destructors of its members and bases as 3559 /// referenced. 3560 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3561 CXXRecordDecl *Record); 3562 3563 /// \brief The list of classes whose vtables have been used within 3564 /// this translation unit, and the source locations at which the 3565 /// first use occurred. 3566 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3567 3568 /// \brief The list of vtables that are required but have not yet been 3569 /// materialized. 3570 SmallVector<VTableUse, 16> VTableUses; 3571 3572 /// \brief The set of classes whose vtables have been used within 3573 /// this translation unit, and a bit that will be true if the vtable is 3574 /// required to be emitted (otherwise, it should be emitted only if needed 3575 /// by code generation). 3576 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3577 3578 /// \brief Load any externally-stored vtable uses. 3579 void LoadExternalVTableUses(); 3580 3581 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 3582 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 3583 DynamicClassesType; 3584 3585 /// \brief A list of all of the dynamic classes in this translation 3586 /// unit. 3587 DynamicClassesType DynamicClasses; 3588 3589 /// \brief Note that the vtable for the given class was used at the 3590 /// given location. 3591 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3592 bool DefinitionRequired = false); 3593 3594 /// MarkVirtualMembersReferenced - Will mark all members of the given 3595 /// CXXRecordDecl referenced. 3596 void MarkVirtualMembersReferenced(SourceLocation Loc, 3597 const CXXRecordDecl *RD); 3598 3599 /// \brief Define all of the vtables that have been used in this 3600 /// translation unit and reference any virtual members used by those 3601 /// vtables. 3602 /// 3603 /// \returns true if any work was done, false otherwise. 3604 bool DefineUsedVTables(); 3605 3606 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3607 3608 void ActOnMemInitializers(Decl *ConstructorDecl, 3609 SourceLocation ColonLoc, 3610 CXXCtorInitializer **MemInits, 3611 unsigned NumMemInits, 3612 bool AnyErrors); 3613 3614 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3615 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3616 Decl *TagDecl, 3617 SourceLocation LBrac, 3618 SourceLocation RBrac, 3619 AttributeList *AttrList); 3620 3621 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3622 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3623 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3624 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3625 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3626 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3627 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3628 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3629 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3630 bool IsInsideALocalClassWithinATemplateFunction(); 3631 3632 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3633 Expr *AssertExpr, 3634 Expr *AssertMessageExpr, 3635 SourceLocation RParenLoc); 3636 3637 FriendDecl *CheckFriendTypeDecl(SourceLocation Loc, 3638 SourceLocation FriendLoc, 3639 TypeSourceInfo *TSInfo); 3640 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3641 MultiTemplateParamsArg TemplateParams); 3642 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, 3643 MultiTemplateParamsArg TemplateParams); 3644 3645 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3646 StorageClass& SC); 3647 void CheckConstructor(CXXConstructorDecl *Constructor); 3648 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3649 StorageClass& SC); 3650 bool CheckDestructor(CXXDestructorDecl *Destructor); 3651 void CheckConversionDeclarator(Declarator &D, QualType &R, 3652 StorageClass& SC); 3653 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3654 3655 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3656 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3657 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3658 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3659 void CheckExplicitlyDefaultedMoveConstructor(CXXConstructorDecl *Ctor); 3660 void CheckExplicitlyDefaultedMoveAssignment(CXXMethodDecl *Method); 3661 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3662 3663 //===--------------------------------------------------------------------===// 3664 // C++ Derived Classes 3665 // 3666 3667 /// ActOnBaseSpecifier - Parsed a base specifier 3668 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3669 SourceRange SpecifierRange, 3670 bool Virtual, AccessSpecifier Access, 3671 TypeSourceInfo *TInfo, 3672 SourceLocation EllipsisLoc); 3673 3674 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3675 SourceRange SpecifierRange, 3676 bool Virtual, AccessSpecifier Access, 3677 ParsedType basetype, 3678 SourceLocation BaseLoc, 3679 SourceLocation EllipsisLoc); 3680 3681 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3682 unsigned NumBases); 3683 void ActOnBaseSpecifiers(Decl *ClassDecl, CXXBaseSpecifier **Bases, 3684 unsigned NumBases); 3685 3686 bool IsDerivedFrom(QualType Derived, QualType Base); 3687 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3688 3689 // FIXME: I don't like this name. 3690 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3691 3692 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3693 3694 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3695 SourceLocation Loc, SourceRange Range, 3696 CXXCastPath *BasePath = 0, 3697 bool IgnoreAccess = false); 3698 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3699 unsigned InaccessibleBaseID, 3700 unsigned AmbigiousBaseConvID, 3701 SourceLocation Loc, SourceRange Range, 3702 DeclarationName Name, 3703 CXXCastPath *BasePath); 3704 3705 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3706 3707 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3708 /// covariant, according to C++ [class.virtual]p5. 3709 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3710 const CXXMethodDecl *Old); 3711 3712 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3713 /// spec is a subset of base spec. 3714 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3715 const CXXMethodDecl *Old); 3716 3717 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3718 3719 /// CheckOverrideControl - Check C++0x override control semantics. 3720 void CheckOverrideControl(const Decl *D); 3721 3722 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3723 /// overrides a virtual member function marked 'final', according to 3724 /// C++0x [class.virtual]p3. 3725 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3726 const CXXMethodDecl *Old); 3727 3728 3729 //===--------------------------------------------------------------------===// 3730 // C++ Access Control 3731 // 3732 3733 enum AccessResult { 3734 AR_accessible, 3735 AR_inaccessible, 3736 AR_dependent, 3737 AR_delayed 3738 }; 3739 3740 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3741 NamedDecl *PrevMemberDecl, 3742 AccessSpecifier LexicalAS); 3743 3744 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3745 DeclAccessPair FoundDecl); 3746 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3747 DeclAccessPair FoundDecl); 3748 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3749 SourceRange PlacementRange, 3750 CXXRecordDecl *NamingClass, 3751 DeclAccessPair FoundDecl, 3752 bool Diagnose = true); 3753 AccessResult CheckConstructorAccess(SourceLocation Loc, 3754 CXXConstructorDecl *D, 3755 const InitializedEntity &Entity, 3756 AccessSpecifier Access, 3757 bool IsCopyBindingRefToTemp = false); 3758 AccessResult CheckConstructorAccess(SourceLocation Loc, 3759 CXXConstructorDecl *D, 3760 AccessSpecifier Access, 3761 PartialDiagnostic PD); 3762 AccessResult CheckDestructorAccess(SourceLocation Loc, 3763 CXXDestructorDecl *Dtor, 3764 const PartialDiagnostic &PDiag); 3765 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3766 NamedDecl *D, 3767 const PartialDiagnostic &PDiag); 3768 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3769 Expr *ObjectExpr, 3770 Expr *ArgExpr, 3771 DeclAccessPair FoundDecl); 3772 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3773 DeclAccessPair FoundDecl); 3774 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3775 QualType Base, QualType Derived, 3776 const CXXBasePath &Path, 3777 unsigned DiagID, 3778 bool ForceCheck = false, 3779 bool ForceUnprivileged = false); 3780 void CheckLookupAccess(const LookupResult &R); 3781 bool IsSimplyAccessible(NamedDecl *decl, DeclContext *Ctx); 3782 3783 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3784 const MultiLevelTemplateArgumentList &TemplateArgs); 3785 void PerformDependentDiagnostics(const DeclContext *Pattern, 3786 const MultiLevelTemplateArgumentList &TemplateArgs); 3787 3788 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3789 3790 /// A flag to suppress access checking. 3791 bool SuppressAccessChecking; 3792 3793 /// \brief When true, access checking violations are treated as SFINAE 3794 /// failures rather than hard errors. 3795 bool AccessCheckingSFINAE; 3796 3797 void ActOnStartSuppressingAccessChecks(); 3798 void ActOnStopSuppressingAccessChecks(); 3799 3800 enum AbstractDiagSelID { 3801 AbstractNone = -1, 3802 AbstractReturnType, 3803 AbstractParamType, 3804 AbstractVariableType, 3805 AbstractFieldType, 3806 AbstractArrayType 3807 }; 3808 3809 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3810 const PartialDiagnostic &PD); 3811 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3812 3813 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3814 AbstractDiagSelID SelID = AbstractNone); 3815 3816 //===--------------------------------------------------------------------===// 3817 // C++ Overloaded Operators [C++ 13.5] 3818 // 3819 3820 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3821 3822 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3823 3824 //===--------------------------------------------------------------------===// 3825 // C++ Templates [C++ 14] 3826 // 3827 void FilterAcceptableTemplateNames(LookupResult &R); 3828 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3829 3830 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3831 QualType ObjectType, bool EnteringContext, 3832 bool &MemberOfUnknownSpecialization); 3833 3834 TemplateNameKind isTemplateName(Scope *S, 3835 CXXScopeSpec &SS, 3836 bool hasTemplateKeyword, 3837 UnqualifiedId &Name, 3838 ParsedType ObjectType, 3839 bool EnteringContext, 3840 TemplateTy &Template, 3841 bool &MemberOfUnknownSpecialization); 3842 3843 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3844 SourceLocation IILoc, 3845 Scope *S, 3846 const CXXScopeSpec *SS, 3847 TemplateTy &SuggestedTemplate, 3848 TemplateNameKind &SuggestedKind); 3849 3850 void DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3851 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3852 3853 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3854 SourceLocation EllipsisLoc, 3855 SourceLocation KeyLoc, 3856 IdentifierInfo *ParamName, 3857 SourceLocation ParamNameLoc, 3858 unsigned Depth, unsigned Position, 3859 SourceLocation EqualLoc, 3860 ParsedType DefaultArg); 3861 3862 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3863 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3864 unsigned Depth, 3865 unsigned Position, 3866 SourceLocation EqualLoc, 3867 Expr *DefaultArg); 3868 Decl *ActOnTemplateTemplateParameter(Scope *S, 3869 SourceLocation TmpLoc, 3870 TemplateParameterList *Params, 3871 SourceLocation EllipsisLoc, 3872 IdentifierInfo *ParamName, 3873 SourceLocation ParamNameLoc, 3874 unsigned Depth, 3875 unsigned Position, 3876 SourceLocation EqualLoc, 3877 ParsedTemplateArgument DefaultArg); 3878 3879 TemplateParameterList * 3880 ActOnTemplateParameterList(unsigned Depth, 3881 SourceLocation ExportLoc, 3882 SourceLocation TemplateLoc, 3883 SourceLocation LAngleLoc, 3884 Decl **Params, unsigned NumParams, 3885 SourceLocation RAngleLoc); 3886 3887 /// \brief The context in which we are checking a template parameter 3888 /// list. 3889 enum TemplateParamListContext { 3890 TPC_ClassTemplate, 3891 TPC_FunctionTemplate, 3892 TPC_ClassTemplateMember, 3893 TPC_FriendFunctionTemplate, 3894 TPC_FriendFunctionTemplateDefinition, 3895 TPC_TypeAliasTemplate 3896 }; 3897 3898 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3899 TemplateParameterList *OldParams, 3900 TemplateParamListContext TPC); 3901 TemplateParameterList * 3902 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3903 SourceLocation DeclLoc, 3904 const CXXScopeSpec &SS, 3905 TemplateParameterList **ParamLists, 3906 unsigned NumParamLists, 3907 bool IsFriend, 3908 bool &IsExplicitSpecialization, 3909 bool &Invalid); 3910 3911 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3912 SourceLocation KWLoc, CXXScopeSpec &SS, 3913 IdentifierInfo *Name, SourceLocation NameLoc, 3914 AttributeList *Attr, 3915 TemplateParameterList *TemplateParams, 3916 AccessSpecifier AS, 3917 SourceLocation ModulePrivateLoc, 3918 unsigned NumOuterTemplateParamLists, 3919 TemplateParameterList **OuterTemplateParamLists); 3920 3921 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3922 TemplateArgumentListInfo &Out); 3923 3924 void NoteAllFoundTemplates(TemplateName Name); 3925 3926 QualType CheckTemplateIdType(TemplateName Template, 3927 SourceLocation TemplateLoc, 3928 TemplateArgumentListInfo &TemplateArgs); 3929 3930 TypeResult 3931 ActOnTemplateIdType(CXXScopeSpec &SS, 3932 TemplateTy Template, SourceLocation TemplateLoc, 3933 SourceLocation LAngleLoc, 3934 ASTTemplateArgsPtr TemplateArgs, 3935 SourceLocation RAngleLoc); 3936 3937 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3938 /// such as \c class T::template apply<U>. 3939 /// 3940 /// \param TUK 3941 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3942 TypeSpecifierType TagSpec, 3943 SourceLocation TagLoc, 3944 CXXScopeSpec &SS, 3945 TemplateTy TemplateD, 3946 SourceLocation TemplateLoc, 3947 SourceLocation LAngleLoc, 3948 ASTTemplateArgsPtr TemplateArgsIn, 3949 SourceLocation RAngleLoc); 3950 3951 3952 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3953 LookupResult &R, 3954 bool RequiresADL, 3955 const TemplateArgumentListInfo &TemplateArgs); 3956 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3957 const DeclarationNameInfo &NameInfo, 3958 const TemplateArgumentListInfo &TemplateArgs); 3959 3960 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3961 SourceLocation TemplateKWLoc, 3962 CXXScopeSpec &SS, 3963 UnqualifiedId &Name, 3964 ParsedType ObjectType, 3965 bool EnteringContext, 3966 TemplateTy &Template); 3967 3968 DeclResult 3969 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3970 SourceLocation KWLoc, 3971 SourceLocation ModulePrivateLoc, 3972 CXXScopeSpec &SS, 3973 TemplateTy Template, 3974 SourceLocation TemplateNameLoc, 3975 SourceLocation LAngleLoc, 3976 ASTTemplateArgsPtr TemplateArgs, 3977 SourceLocation RAngleLoc, 3978 AttributeList *Attr, 3979 MultiTemplateParamsArg TemplateParameterLists); 3980 3981 Decl *ActOnTemplateDeclarator(Scope *S, 3982 MultiTemplateParamsArg TemplateParameterLists, 3983 Declarator &D); 3984 3985 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3986 MultiTemplateParamsArg TemplateParameterLists, 3987 Declarator &D); 3988 3989 bool 3990 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3991 TemplateSpecializationKind NewTSK, 3992 NamedDecl *PrevDecl, 3993 TemplateSpecializationKind PrevTSK, 3994 SourceLocation PrevPtOfInstantiation, 3995 bool &SuppressNew); 3996 3997 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3998 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3999 LookupResult &Previous); 4000 4001 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 4002 TemplateArgumentListInfo *ExplicitTemplateArgs, 4003 LookupResult &Previous); 4004 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 4005 4006 DeclResult 4007 ActOnExplicitInstantiation(Scope *S, 4008 SourceLocation ExternLoc, 4009 SourceLocation TemplateLoc, 4010 unsigned TagSpec, 4011 SourceLocation KWLoc, 4012 const CXXScopeSpec &SS, 4013 TemplateTy Template, 4014 SourceLocation TemplateNameLoc, 4015 SourceLocation LAngleLoc, 4016 ASTTemplateArgsPtr TemplateArgs, 4017 SourceLocation RAngleLoc, 4018 AttributeList *Attr); 4019 4020 DeclResult 4021 ActOnExplicitInstantiation(Scope *S, 4022 SourceLocation ExternLoc, 4023 SourceLocation TemplateLoc, 4024 unsigned TagSpec, 4025 SourceLocation KWLoc, 4026 CXXScopeSpec &SS, 4027 IdentifierInfo *Name, 4028 SourceLocation NameLoc, 4029 AttributeList *Attr); 4030 4031 DeclResult ActOnExplicitInstantiation(Scope *S, 4032 SourceLocation ExternLoc, 4033 SourceLocation TemplateLoc, 4034 Declarator &D); 4035 4036 TemplateArgumentLoc 4037 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 4038 SourceLocation TemplateLoc, 4039 SourceLocation RAngleLoc, 4040 Decl *Param, 4041 SmallVectorImpl<TemplateArgument> &Converted); 4042 4043 /// \brief Specifies the context in which a particular template 4044 /// argument is being checked. 4045 enum CheckTemplateArgumentKind { 4046 /// \brief The template argument was specified in the code or was 4047 /// instantiated with some deduced template arguments. 4048 CTAK_Specified, 4049 4050 /// \brief The template argument was deduced via template argument 4051 /// deduction. 4052 CTAK_Deduced, 4053 4054 /// \brief The template argument was deduced from an array bound 4055 /// via template argument deduction. 4056 CTAK_DeducedFromArrayBound 4057 }; 4058 4059 bool CheckTemplateArgument(NamedDecl *Param, 4060 const TemplateArgumentLoc &Arg, 4061 NamedDecl *Template, 4062 SourceLocation TemplateLoc, 4063 SourceLocation RAngleLoc, 4064 unsigned ArgumentPackIndex, 4065 SmallVectorImpl<TemplateArgument> &Converted, 4066 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4067 4068 /// \brief Check that the given template arguments can be be provided to 4069 /// the given template, converting the arguments along the way. 4070 /// 4071 /// \param Template The template to which the template arguments are being 4072 /// provided. 4073 /// 4074 /// \param TemplateLoc The location of the template name in the source. 4075 /// 4076 /// \param TemplateArgs The list of template arguments. If the template is 4077 /// a template template parameter, this function may extend the set of 4078 /// template arguments to also include substituted, defaulted template 4079 /// arguments. 4080 /// 4081 /// \param PartialTemplateArgs True if the list of template arguments is 4082 /// intentionally partial, e.g., because we're checking just the initial 4083 /// set of template arguments. 4084 /// 4085 /// \param Converted Will receive the converted, canonicalized template 4086 /// arguments. 4087 /// 4088 /// \returns True if an error occurred, false otherwise. 4089 bool CheckTemplateArgumentList(TemplateDecl *Template, 4090 SourceLocation TemplateLoc, 4091 TemplateArgumentListInfo &TemplateArgs, 4092 bool PartialTemplateArgs, 4093 SmallVectorImpl<TemplateArgument> &Converted); 4094 4095 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 4096 const TemplateArgumentLoc &Arg, 4097 SmallVectorImpl<TemplateArgument> &Converted); 4098 4099 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 4100 TypeSourceInfo *Arg); 4101 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 4102 TemplateArgument &Converted); 4103 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 4104 QualType InstantiatedParamType, Expr *Arg, 4105 TemplateArgument &Converted, 4106 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4107 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 4108 const TemplateArgumentLoc &Arg); 4109 4110 ExprResult 4111 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 4112 QualType ParamType, 4113 SourceLocation Loc); 4114 ExprResult 4115 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 4116 SourceLocation Loc); 4117 4118 /// \brief Enumeration describing how template parameter lists are compared 4119 /// for equality. 4120 enum TemplateParameterListEqualKind { 4121 /// \brief We are matching the template parameter lists of two templates 4122 /// that might be redeclarations. 4123 /// 4124 /// \code 4125 /// template<typename T> struct X; 4126 /// template<typename T> struct X; 4127 /// \endcode 4128 TPL_TemplateMatch, 4129 4130 /// \brief We are matching the template parameter lists of two template 4131 /// template parameters as part of matching the template parameter lists 4132 /// of two templates that might be redeclarations. 4133 /// 4134 /// \code 4135 /// template<template<int I> class TT> struct X; 4136 /// template<template<int Value> class Other> struct X; 4137 /// \endcode 4138 TPL_TemplateTemplateParmMatch, 4139 4140 /// \brief We are matching the template parameter lists of a template 4141 /// template argument against the template parameter lists of a template 4142 /// template parameter. 4143 /// 4144 /// \code 4145 /// template<template<int Value> class Metafun> struct X; 4146 /// template<int Value> struct integer_c; 4147 /// X<integer_c> xic; 4148 /// \endcode 4149 TPL_TemplateTemplateArgumentMatch 4150 }; 4151 4152 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 4153 TemplateParameterList *Old, 4154 bool Complain, 4155 TemplateParameterListEqualKind Kind, 4156 SourceLocation TemplateArgLoc 4157 = SourceLocation()); 4158 4159 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 4160 4161 /// \brief Called when the parser has parsed a C++ typename 4162 /// specifier, e.g., "typename T::type". 4163 /// 4164 /// \param S The scope in which this typename type occurs. 4165 /// \param TypenameLoc the location of the 'typename' keyword 4166 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4167 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 4168 /// \param IdLoc the location of the identifier. 4169 TypeResult 4170 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4171 const CXXScopeSpec &SS, const IdentifierInfo &II, 4172 SourceLocation IdLoc); 4173 4174 /// \brief Called when the parser has parsed a C++ typename 4175 /// specifier that ends in a template-id, e.g., 4176 /// "typename MetaFun::template apply<T1, T2>". 4177 /// 4178 /// \param S The scope in which this typename type occurs. 4179 /// \param TypenameLoc the location of the 'typename' keyword 4180 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4181 /// \param TemplateLoc the location of the 'template' keyword, if any. 4182 /// \param TemplateName The template name. 4183 /// \param TemplateNameLoc The location of the template name. 4184 /// \param LAngleLoc The location of the opening angle bracket ('<'). 4185 /// \param TemplateArgs The template arguments. 4186 /// \param RAngleLoc The location of the closing angle bracket ('>'). 4187 TypeResult 4188 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4189 const CXXScopeSpec &SS, 4190 SourceLocation TemplateLoc, 4191 TemplateTy Template, 4192 SourceLocation TemplateNameLoc, 4193 SourceLocation LAngleLoc, 4194 ASTTemplateArgsPtr TemplateArgs, 4195 SourceLocation RAngleLoc); 4196 4197 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 4198 SourceLocation KeywordLoc, 4199 NestedNameSpecifierLoc QualifierLoc, 4200 const IdentifierInfo &II, 4201 SourceLocation IILoc); 4202 4203 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 4204 SourceLocation Loc, 4205 DeclarationName Name); 4206 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 4207 4208 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 4209 bool RebuildTemplateParamsInCurrentInstantiation( 4210 TemplateParameterList *Params); 4211 4212 std::string 4213 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4214 const TemplateArgumentList &Args); 4215 4216 std::string 4217 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4218 const TemplateArgument *Args, 4219 unsigned NumArgs); 4220 4221 //===--------------------------------------------------------------------===// 4222 // C++ Variadic Templates (C++0x [temp.variadic]) 4223 //===--------------------------------------------------------------------===// 4224 4225 /// \brief The context in which an unexpanded parameter pack is 4226 /// being diagnosed. 4227 /// 4228 /// Note that the values of this enumeration line up with the first 4229 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4230 enum UnexpandedParameterPackContext { 4231 /// \brief An arbitrary expression. 4232 UPPC_Expression = 0, 4233 4234 /// \brief The base type of a class type. 4235 UPPC_BaseType, 4236 4237 /// \brief The type of an arbitrary declaration. 4238 UPPC_DeclarationType, 4239 4240 /// \brief The type of a data member. 4241 UPPC_DataMemberType, 4242 4243 /// \brief The size of a bit-field. 4244 UPPC_BitFieldWidth, 4245 4246 /// \brief The expression in a static assertion. 4247 UPPC_StaticAssertExpression, 4248 4249 /// \brief The fixed underlying type of an enumeration. 4250 UPPC_FixedUnderlyingType, 4251 4252 /// \brief The enumerator value. 4253 UPPC_EnumeratorValue, 4254 4255 /// \brief A using declaration. 4256 UPPC_UsingDeclaration, 4257 4258 /// \brief A friend declaration. 4259 UPPC_FriendDeclaration, 4260 4261 /// \brief A declaration qualifier. 4262 UPPC_DeclarationQualifier, 4263 4264 /// \brief An initializer. 4265 UPPC_Initializer, 4266 4267 /// \brief A default argument. 4268 UPPC_DefaultArgument, 4269 4270 /// \brief The type of a non-type template parameter. 4271 UPPC_NonTypeTemplateParameterType, 4272 4273 /// \brief The type of an exception. 4274 UPPC_ExceptionType, 4275 4276 /// \brief Partial specialization. 4277 UPPC_PartialSpecialization, 4278 4279 /// \brief Microsoft __if_exists. 4280 UPPC_IfExists, 4281 4282 /// \brief Microsoft __if_not_exists. 4283 UPPC_IfNotExists 4284}; 4285 4286 /// \brief Diagnose unexpanded parameter packs. 4287 /// 4288 /// \param Loc The location at which we should emit the diagnostic. 4289 /// 4290 /// \param UPPC The context in which we are diagnosing unexpanded 4291 /// parameter packs. 4292 /// 4293 /// \param Unexpanded the set of unexpanded parameter packs. 4294 void DiagnoseUnexpandedParameterPacks(SourceLocation Loc, 4295 UnexpandedParameterPackContext UPPC, 4296 const SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4297 4298 /// \brief If the given type contains an unexpanded parameter pack, 4299 /// diagnose the error. 4300 /// 4301 /// \param Loc The source location where a diagnostc should be emitted. 4302 /// 4303 /// \param T The type that is being checked for unexpanded parameter 4304 /// packs. 4305 /// 4306 /// \returns true if an error occurred, false otherwise. 4307 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4308 UnexpandedParameterPackContext UPPC); 4309 4310 /// \brief If the given expression contains an unexpanded parameter 4311 /// pack, diagnose the error. 4312 /// 4313 /// \param E The expression that is being checked for unexpanded 4314 /// parameter packs. 4315 /// 4316 /// \returns true if an error occurred, false otherwise. 4317 bool DiagnoseUnexpandedParameterPack(Expr *E, 4318 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4319 4320 /// \brief If the given nested-name-specifier contains an unexpanded 4321 /// parameter pack, diagnose the error. 4322 /// 4323 /// \param SS The nested-name-specifier that is being checked for 4324 /// unexpanded parameter packs. 4325 /// 4326 /// \returns true if an error occurred, false otherwise. 4327 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4328 UnexpandedParameterPackContext UPPC); 4329 4330 /// \brief If the given name contains an unexpanded parameter pack, 4331 /// diagnose the error. 4332 /// 4333 /// \param NameInfo The name (with source location information) that 4334 /// is being checked for unexpanded parameter packs. 4335 /// 4336 /// \returns true if an error occurred, false otherwise. 4337 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4338 UnexpandedParameterPackContext UPPC); 4339 4340 /// \brief If the given template name contains an unexpanded parameter pack, 4341 /// diagnose the error. 4342 /// 4343 /// \param Loc The location of the template name. 4344 /// 4345 /// \param Template The template name that is being checked for unexpanded 4346 /// parameter packs. 4347 /// 4348 /// \returns true if an error occurred, false otherwise. 4349 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4350 TemplateName Template, 4351 UnexpandedParameterPackContext UPPC); 4352 4353 /// \brief If the given template argument contains an unexpanded parameter 4354 /// pack, diagnose the error. 4355 /// 4356 /// \param Arg The template argument that is being checked for unexpanded 4357 /// parameter packs. 4358 /// 4359 /// \returns true if an error occurred, false otherwise. 4360 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4361 UnexpandedParameterPackContext UPPC); 4362 4363 /// \brief Collect the set of unexpanded parameter packs within the given 4364 /// template argument. 4365 /// 4366 /// \param Arg The template argument that will be traversed to find 4367 /// unexpanded parameter packs. 4368 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4369 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4370 4371 /// \brief Collect the set of unexpanded parameter packs within the given 4372 /// template argument. 4373 /// 4374 /// \param Arg The template argument that will be traversed to find 4375 /// unexpanded parameter packs. 4376 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4377 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4378 4379 /// \brief Collect the set of unexpanded parameter packs within the given 4380 /// type. 4381 /// 4382 /// \param T The type that will be traversed to find 4383 /// unexpanded parameter packs. 4384 void collectUnexpandedParameterPacks(QualType T, 4385 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4386 4387 /// \brief Collect the set of unexpanded parameter packs within the given 4388 /// type. 4389 /// 4390 /// \param TL The type that will be traversed to find 4391 /// unexpanded parameter packs. 4392 void collectUnexpandedParameterPacks(TypeLoc TL, 4393 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4394 4395 /// \brief Collect the set of unexpanded parameter packs within the given 4396 /// nested-name-specifier. 4397 /// 4398 /// \param SS The nested-name-specifier that will be traversed to find 4399 /// unexpanded parameter packs. 4400 void collectUnexpandedParameterPacks(CXXScopeSpec &SS, 4401 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4402 4403 /// \brief Collect the set of unexpanded parameter packs within the given 4404 /// name. 4405 /// 4406 /// \param NameInfo The name that will be traversed to find 4407 /// unexpanded parameter packs. 4408 void collectUnexpandedParameterPacks(const DeclarationNameInfo &NameInfo, 4409 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4410 4411 /// \brief Invoked when parsing a template argument followed by an 4412 /// ellipsis, which creates a pack expansion. 4413 /// 4414 /// \param Arg The template argument preceding the ellipsis, which 4415 /// may already be invalid. 4416 /// 4417 /// \param EllipsisLoc The location of the ellipsis. 4418 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4419 SourceLocation EllipsisLoc); 4420 4421 /// \brief Invoked when parsing a type followed by an ellipsis, which 4422 /// creates a pack expansion. 4423 /// 4424 /// \param Type The type preceding the ellipsis, which will become 4425 /// the pattern of the pack expansion. 4426 /// 4427 /// \param EllipsisLoc The location of the ellipsis. 4428 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4429 4430 /// \brief Construct a pack expansion type from the pattern of the pack 4431 /// expansion. 4432 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4433 SourceLocation EllipsisLoc, 4434 llvm::Optional<unsigned> NumExpansions); 4435 4436 /// \brief Construct a pack expansion type from the pattern of the pack 4437 /// expansion. 4438 QualType CheckPackExpansion(QualType Pattern, 4439 SourceRange PatternRange, 4440 SourceLocation EllipsisLoc, 4441 llvm::Optional<unsigned> NumExpansions); 4442 4443 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4444 /// creates a pack expansion. 4445 /// 4446 /// \param Pattern The expression preceding the ellipsis, which will become 4447 /// the pattern of the pack expansion. 4448 /// 4449 /// \param EllipsisLoc The location of the ellipsis. 4450 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4451 4452 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4453 /// creates a pack expansion. 4454 /// 4455 /// \param Pattern The expression preceding the ellipsis, which will become 4456 /// the pattern of the pack expansion. 4457 /// 4458 /// \param EllipsisLoc The location of the ellipsis. 4459 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4460 llvm::Optional<unsigned> NumExpansions); 4461 4462 /// \brief Determine whether we could expand a pack expansion with the 4463 /// given set of parameter packs into separate arguments by repeatedly 4464 /// transforming the pattern. 4465 /// 4466 /// \param EllipsisLoc The location of the ellipsis that identifies the 4467 /// pack expansion. 4468 /// 4469 /// \param PatternRange The source range that covers the entire pattern of 4470 /// the pack expansion. 4471 /// 4472 /// \param Unexpanded The set of unexpanded parameter packs within the 4473 /// pattern. 4474 /// 4475 /// \param NumUnexpanded The number of unexpanded parameter packs in 4476 /// \p Unexpanded. 4477 /// 4478 /// \param ShouldExpand Will be set to \c true if the transformer should 4479 /// expand the corresponding pack expansions into separate arguments. When 4480 /// set, \c NumExpansions must also be set. 4481 /// 4482 /// \param RetainExpansion Whether the caller should add an unexpanded 4483 /// pack expansion after all of the expanded arguments. This is used 4484 /// when extending explicitly-specified template argument packs per 4485 /// C++0x [temp.arg.explicit]p9. 4486 /// 4487 /// \param NumExpansions The number of separate arguments that will be in 4488 /// the expanded form of the corresponding pack expansion. This is both an 4489 /// input and an output parameter, which can be set by the caller if the 4490 /// number of expansions is known a priori (e.g., due to a prior substitution) 4491 /// and will be set by the callee when the number of expansions is known. 4492 /// The callee must set this value when \c ShouldExpand is \c true; it may 4493 /// set this value in other cases. 4494 /// 4495 /// \returns true if an error occurred (e.g., because the parameter packs 4496 /// are to be instantiated with arguments of different lengths), false 4497 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4498 /// must be set. 4499 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4500 SourceRange PatternRange, 4501 llvm::ArrayRef<UnexpandedParameterPack> Unexpanded, 4502 const MultiLevelTemplateArgumentList &TemplateArgs, 4503 bool &ShouldExpand, 4504 bool &RetainExpansion, 4505 llvm::Optional<unsigned> &NumExpansions); 4506 4507 /// \brief Determine the number of arguments in the given pack expansion 4508 /// type. 4509 /// 4510 /// This routine already assumes that the pack expansion type can be 4511 /// expanded and that the number of arguments in the expansion is 4512 /// consistent across all of the unexpanded parameter packs in its pattern. 4513 unsigned getNumArgumentsInExpansion(QualType T, 4514 const MultiLevelTemplateArgumentList &TemplateArgs); 4515 4516 /// \brief Determine whether the given declarator contains any unexpanded 4517 /// parameter packs. 4518 /// 4519 /// This routine is used by the parser to disambiguate function declarators 4520 /// with an ellipsis prior to the ')', e.g., 4521 /// 4522 /// \code 4523 /// void f(T...); 4524 /// \endcode 4525 /// 4526 /// To determine whether we have an (unnamed) function parameter pack or 4527 /// a variadic function. 4528 /// 4529 /// \returns true if the declarator contains any unexpanded parameter packs, 4530 /// false otherwise. 4531 bool containsUnexpandedParameterPacks(Declarator &D); 4532 4533 //===--------------------------------------------------------------------===// 4534 // C++ Template Argument Deduction (C++ [temp.deduct]) 4535 //===--------------------------------------------------------------------===// 4536 4537 /// \brief Describes the result of template argument deduction. 4538 /// 4539 /// The TemplateDeductionResult enumeration describes the result of 4540 /// template argument deduction, as returned from 4541 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4542 /// structure provides additional information about the results of 4543 /// template argument deduction, e.g., the deduced template argument 4544 /// list (if successful) or the specific template parameters or 4545 /// deduced arguments that were involved in the failure. 4546 enum TemplateDeductionResult { 4547 /// \brief Template argument deduction was successful. 4548 TDK_Success = 0, 4549 /// \brief Template argument deduction exceeded the maximum template 4550 /// instantiation depth (which has already been diagnosed). 4551 TDK_InstantiationDepth, 4552 /// \brief Template argument deduction did not deduce a value 4553 /// for every template parameter. 4554 TDK_Incomplete, 4555 /// \brief Template argument deduction produced inconsistent 4556 /// deduced values for the given template parameter. 4557 TDK_Inconsistent, 4558 /// \brief Template argument deduction failed due to inconsistent 4559 /// cv-qualifiers on a template parameter type that would 4560 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4561 /// but were given a non-const "X". 4562 TDK_Underqualified, 4563 /// \brief Substitution of the deduced template argument values 4564 /// resulted in an error. 4565 TDK_SubstitutionFailure, 4566 /// \brief Substitution of the deduced template argument values 4567 /// into a non-deduced context produced a type or value that 4568 /// produces a type that does not match the original template 4569 /// arguments provided. 4570 TDK_NonDeducedMismatch, 4571 /// \brief When performing template argument deduction for a function 4572 /// template, there were too many call arguments. 4573 TDK_TooManyArguments, 4574 /// \brief When performing template argument deduction for a function 4575 /// template, there were too few call arguments. 4576 TDK_TooFewArguments, 4577 /// \brief The explicitly-specified template arguments were not valid 4578 /// template arguments for the given template. 4579 TDK_InvalidExplicitArguments, 4580 /// \brief The arguments included an overloaded function name that could 4581 /// not be resolved to a suitable function. 4582 TDK_FailedOverloadResolution 4583 }; 4584 4585 TemplateDeductionResult 4586 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4587 const TemplateArgumentList &TemplateArgs, 4588 sema::TemplateDeductionInfo &Info); 4589 4590 TemplateDeductionResult 4591 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4592 TemplateArgumentListInfo &ExplicitTemplateArgs, 4593 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4594 SmallVectorImpl<QualType> &ParamTypes, 4595 QualType *FunctionType, 4596 sema::TemplateDeductionInfo &Info); 4597 4598 /// brief A function argument from which we performed template argument 4599 // deduction for a call. 4600 struct OriginalCallArg { 4601 OriginalCallArg(QualType OriginalParamType, 4602 unsigned ArgIdx, 4603 QualType OriginalArgType) 4604 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4605 OriginalArgType(OriginalArgType) { } 4606 4607 QualType OriginalParamType; 4608 unsigned ArgIdx; 4609 QualType OriginalArgType; 4610 }; 4611 4612 TemplateDeductionResult 4613 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4614 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4615 unsigned NumExplicitlySpecified, 4616 FunctionDecl *&Specialization, 4617 sema::TemplateDeductionInfo &Info, 4618 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4619 4620 TemplateDeductionResult 4621 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4622 TemplateArgumentListInfo *ExplicitTemplateArgs, 4623 Expr **Args, unsigned NumArgs, 4624 FunctionDecl *&Specialization, 4625 sema::TemplateDeductionInfo &Info); 4626 4627 TemplateDeductionResult 4628 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4629 TemplateArgumentListInfo *ExplicitTemplateArgs, 4630 QualType ArgFunctionType, 4631 FunctionDecl *&Specialization, 4632 sema::TemplateDeductionInfo &Info); 4633 4634 TemplateDeductionResult 4635 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4636 QualType ToType, 4637 CXXConversionDecl *&Specialization, 4638 sema::TemplateDeductionInfo &Info); 4639 4640 TemplateDeductionResult 4641 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4642 TemplateArgumentListInfo *ExplicitTemplateArgs, 4643 FunctionDecl *&Specialization, 4644 sema::TemplateDeductionInfo &Info); 4645 4646 bool DeduceAutoType(TypeSourceInfo *AutoType, Expr *&Initializer, 4647 TypeSourceInfo *&Result); 4648 void DiagnoseAutoDeductionFailure(VarDecl *VDecl, Expr *Init); 4649 4650 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4651 FunctionTemplateDecl *FT2, 4652 SourceLocation Loc, 4653 TemplatePartialOrderingContext TPOC, 4654 unsigned NumCallArguments); 4655 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4656 UnresolvedSetIterator SEnd, 4657 TemplatePartialOrderingContext TPOC, 4658 unsigned NumCallArguments, 4659 SourceLocation Loc, 4660 const PartialDiagnostic &NoneDiag, 4661 const PartialDiagnostic &AmbigDiag, 4662 const PartialDiagnostic &CandidateDiag, 4663 bool Complain = true, 4664 QualType TargetType = QualType()); 4665 4666 ClassTemplatePartialSpecializationDecl * 4667 getMoreSpecializedPartialSpecialization( 4668 ClassTemplatePartialSpecializationDecl *PS1, 4669 ClassTemplatePartialSpecializationDecl *PS2, 4670 SourceLocation Loc); 4671 4672 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4673 bool OnlyDeduced, 4674 unsigned Depth, 4675 SmallVectorImpl<bool> &Used); 4676 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4677 SmallVectorImpl<bool> &Deduced) { 4678 return MarkDeducedTemplateParameters(Context, FunctionTemplate, Deduced); 4679 } 4680 static void MarkDeducedTemplateParameters(ASTContext &Ctx, 4681 FunctionTemplateDecl *FunctionTemplate, 4682 SmallVectorImpl<bool> &Deduced); 4683 4684 //===--------------------------------------------------------------------===// 4685 // C++ Template Instantiation 4686 // 4687 4688 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4689 const TemplateArgumentList *Innermost = 0, 4690 bool RelativeToPrimary = false, 4691 const FunctionDecl *Pattern = 0); 4692 4693 /// \brief A template instantiation that is currently in progress. 4694 struct ActiveTemplateInstantiation { 4695 /// \brief The kind of template instantiation we are performing 4696 enum InstantiationKind { 4697 /// We are instantiating a template declaration. The entity is 4698 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4699 TemplateInstantiation, 4700 4701 /// We are instantiating a default argument for a template 4702 /// parameter. The Entity is the template, and 4703 /// TemplateArgs/NumTemplateArguments provides the template 4704 /// arguments as specified. 4705 /// FIXME: Use a TemplateArgumentList 4706 DefaultTemplateArgumentInstantiation, 4707 4708 /// We are instantiating a default argument for a function. 4709 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4710 /// provides the template arguments as specified. 4711 DefaultFunctionArgumentInstantiation, 4712 4713 /// We are substituting explicit template arguments provided for 4714 /// a function template. The entity is a FunctionTemplateDecl. 4715 ExplicitTemplateArgumentSubstitution, 4716 4717 /// We are substituting template argument determined as part of 4718 /// template argument deduction for either a class template 4719 /// partial specialization or a function template. The 4720 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4721 /// a FunctionTemplateDecl. 4722 DeducedTemplateArgumentSubstitution, 4723 4724 /// We are substituting prior template arguments into a new 4725 /// template parameter. The template parameter itself is either a 4726 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4727 PriorTemplateArgumentSubstitution, 4728 4729 /// We are checking the validity of a default template argument that 4730 /// has been used when naming a template-id. 4731 DefaultTemplateArgumentChecking 4732 } Kind; 4733 4734 /// \brief The point of instantiation within the source code. 4735 SourceLocation PointOfInstantiation; 4736 4737 /// \brief The template (or partial specialization) in which we are 4738 /// performing the instantiation, for substitutions of prior template 4739 /// arguments. 4740 NamedDecl *Template; 4741 4742 /// \brief The entity that is being instantiated. 4743 uintptr_t Entity; 4744 4745 /// \brief The list of template arguments we are substituting, if they 4746 /// are not part of the entity. 4747 const TemplateArgument *TemplateArgs; 4748 4749 /// \brief The number of template arguments in TemplateArgs. 4750 unsigned NumTemplateArgs; 4751 4752 /// \brief The template deduction info object associated with the 4753 /// substitution or checking of explicit or deduced template arguments. 4754 sema::TemplateDeductionInfo *DeductionInfo; 4755 4756 /// \brief The source range that covers the construct that cause 4757 /// the instantiation, e.g., the template-id that causes a class 4758 /// template instantiation. 4759 SourceRange InstantiationRange; 4760 4761 ActiveTemplateInstantiation() 4762 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4763 NumTemplateArgs(0), DeductionInfo(0) {} 4764 4765 /// \brief Determines whether this template is an actual instantiation 4766 /// that should be counted toward the maximum instantiation depth. 4767 bool isInstantiationRecord() const; 4768 4769 friend bool operator==(const ActiveTemplateInstantiation &X, 4770 const ActiveTemplateInstantiation &Y) { 4771 if (X.Kind != Y.Kind) 4772 return false; 4773 4774 if (X.Entity != Y.Entity) 4775 return false; 4776 4777 switch (X.Kind) { 4778 case TemplateInstantiation: 4779 return true; 4780 4781 case PriorTemplateArgumentSubstitution: 4782 case DefaultTemplateArgumentChecking: 4783 if (X.Template != Y.Template) 4784 return false; 4785 4786 // Fall through 4787 4788 case DefaultTemplateArgumentInstantiation: 4789 case ExplicitTemplateArgumentSubstitution: 4790 case DeducedTemplateArgumentSubstitution: 4791 case DefaultFunctionArgumentInstantiation: 4792 return X.TemplateArgs == Y.TemplateArgs; 4793 4794 } 4795 4796 llvm_unreachable("Invalid InstantiationKind!"); 4797 } 4798 4799 friend bool operator!=(const ActiveTemplateInstantiation &X, 4800 const ActiveTemplateInstantiation &Y) { 4801 return !(X == Y); 4802 } 4803 }; 4804 4805 /// \brief List of active template instantiations. 4806 /// 4807 /// This vector is treated as a stack. As one template instantiation 4808 /// requires another template instantiation, additional 4809 /// instantiations are pushed onto the stack up to a 4810 /// user-configurable limit LangOptions::InstantiationDepth. 4811 SmallVector<ActiveTemplateInstantiation, 16> 4812 ActiveTemplateInstantiations; 4813 4814 /// \brief Whether we are in a SFINAE context that is not associated with 4815 /// template instantiation. 4816 /// 4817 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4818 /// of a template instantiation or template argument deduction. 4819 bool InNonInstantiationSFINAEContext; 4820 4821 /// \brief The number of ActiveTemplateInstantiation entries in 4822 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4823 /// therefore, should not be counted as part of the instantiation depth. 4824 unsigned NonInstantiationEntries; 4825 4826 /// \brief The last template from which a template instantiation 4827 /// error or warning was produced. 4828 /// 4829 /// This value is used to suppress printing of redundant template 4830 /// instantiation backtraces when there are multiple errors in the 4831 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4832 /// to implement it anywhere else. 4833 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4834 4835 /// \brief The current index into pack expansion arguments that will be 4836 /// used for substitution of parameter packs. 4837 /// 4838 /// The pack expansion index will be -1 to indicate that parameter packs 4839 /// should be instantiated as themselves. Otherwise, the index specifies 4840 /// which argument within the parameter pack will be used for substitution. 4841 int ArgumentPackSubstitutionIndex; 4842 4843 /// \brief RAII object used to change the argument pack substitution index 4844 /// within a \c Sema object. 4845 /// 4846 /// See \c ArgumentPackSubstitutionIndex for more information. 4847 class ArgumentPackSubstitutionIndexRAII { 4848 Sema &Self; 4849 int OldSubstitutionIndex; 4850 4851 public: 4852 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4853 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4854 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4855 } 4856 4857 ~ArgumentPackSubstitutionIndexRAII() { 4858 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4859 } 4860 }; 4861 4862 friend class ArgumentPackSubstitutionRAII; 4863 4864 /// \brief The stack of calls expression undergoing template instantiation. 4865 /// 4866 /// The top of this stack is used by a fixit instantiating unresolved 4867 /// function calls to fix the AST to match the textual change it prints. 4868 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4869 4870 /// \brief For each declaration that involved template argument deduction, the 4871 /// set of diagnostics that were suppressed during that template argument 4872 /// deduction. 4873 /// 4874 /// FIXME: Serialize this structure to the AST file. 4875 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 4876 SuppressedDiagnostics; 4877 4878 /// \brief A stack object to be created when performing template 4879 /// instantiation. 4880 /// 4881 /// Construction of an object of type \c InstantiatingTemplate 4882 /// pushes the current instantiation onto the stack of active 4883 /// instantiations. If the size of this stack exceeds the maximum 4884 /// number of recursive template instantiations, construction 4885 /// produces an error and evaluates true. 4886 /// 4887 /// Destruction of this object will pop the named instantiation off 4888 /// the stack. 4889 struct InstantiatingTemplate { 4890 /// \brief Note that we are instantiating a class template, 4891 /// function template, or a member thereof. 4892 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4893 Decl *Entity, 4894 SourceRange InstantiationRange = SourceRange()); 4895 4896 /// \brief Note that we are instantiating a default argument in a 4897 /// template-id. 4898 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4899 TemplateDecl *Template, 4900 const TemplateArgument *TemplateArgs, 4901 unsigned NumTemplateArgs, 4902 SourceRange InstantiationRange = SourceRange()); 4903 4904 /// \brief Note that we are instantiating a default argument in a 4905 /// template-id. 4906 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4907 FunctionTemplateDecl *FunctionTemplate, 4908 const TemplateArgument *TemplateArgs, 4909 unsigned NumTemplateArgs, 4910 ActiveTemplateInstantiation::InstantiationKind Kind, 4911 sema::TemplateDeductionInfo &DeductionInfo, 4912 SourceRange InstantiationRange = SourceRange()); 4913 4914 /// \brief Note that we are instantiating as part of template 4915 /// argument deduction for a class template partial 4916 /// specialization. 4917 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4918 ClassTemplatePartialSpecializationDecl *PartialSpec, 4919 const TemplateArgument *TemplateArgs, 4920 unsigned NumTemplateArgs, 4921 sema::TemplateDeductionInfo &DeductionInfo, 4922 SourceRange InstantiationRange = SourceRange()); 4923 4924 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4925 ParmVarDecl *Param, 4926 const TemplateArgument *TemplateArgs, 4927 unsigned NumTemplateArgs, 4928 SourceRange InstantiationRange = SourceRange()); 4929 4930 /// \brief Note that we are substituting prior template arguments into a 4931 /// non-type or template template parameter. 4932 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4933 NamedDecl *Template, 4934 NonTypeTemplateParmDecl *Param, 4935 const TemplateArgument *TemplateArgs, 4936 unsigned NumTemplateArgs, 4937 SourceRange InstantiationRange); 4938 4939 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4940 NamedDecl *Template, 4941 TemplateTemplateParmDecl *Param, 4942 const TemplateArgument *TemplateArgs, 4943 unsigned NumTemplateArgs, 4944 SourceRange InstantiationRange); 4945 4946 /// \brief Note that we are checking the default template argument 4947 /// against the template parameter for a given template-id. 4948 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4949 TemplateDecl *Template, 4950 NamedDecl *Param, 4951 const TemplateArgument *TemplateArgs, 4952 unsigned NumTemplateArgs, 4953 SourceRange InstantiationRange); 4954 4955 4956 /// \brief Note that we have finished instantiating this template. 4957 void Clear(); 4958 4959 ~InstantiatingTemplate() { Clear(); } 4960 4961 /// \brief Determines whether we have exceeded the maximum 4962 /// recursive template instantiations. 4963 operator bool() const { return Invalid; } 4964 4965 private: 4966 Sema &SemaRef; 4967 bool Invalid; 4968 bool SavedInNonInstantiationSFINAEContext; 4969 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4970 SourceRange InstantiationRange); 4971 4972 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4973 4974 InstantiatingTemplate& 4975 operator=(const InstantiatingTemplate&); // not implemented 4976 }; 4977 4978 void PrintInstantiationStack(); 4979 4980 /// \brief Determines whether we are currently in a context where 4981 /// template argument substitution failures are not considered 4982 /// errors. 4983 /// 4984 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4985 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4986 /// template-deduction context object, which can be used to capture 4987 /// diagnostics that will be suppressed. 4988 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4989 4990 /// \brief RAII class used to determine whether SFINAE has 4991 /// trapped any errors that occur during template argument 4992 /// deduction.` 4993 class SFINAETrap { 4994 Sema &SemaRef; 4995 unsigned PrevSFINAEErrors; 4996 bool PrevInNonInstantiationSFINAEContext; 4997 bool PrevAccessCheckingSFINAE; 4998 4999 public: 5000 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 5001 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 5002 PrevInNonInstantiationSFINAEContext( 5003 SemaRef.InNonInstantiationSFINAEContext), 5004 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 5005 { 5006 if (!SemaRef.isSFINAEContext()) 5007 SemaRef.InNonInstantiationSFINAEContext = true; 5008 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 5009 } 5010 5011 ~SFINAETrap() { 5012 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 5013 SemaRef.InNonInstantiationSFINAEContext 5014 = PrevInNonInstantiationSFINAEContext; 5015 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 5016 } 5017 5018 /// \brief Determine whether any SFINAE errors have been trapped. 5019 bool hasErrorOccurred() const { 5020 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 5021 } 5022 }; 5023 5024 /// \brief The current instantiation scope used to store local 5025 /// variables. 5026 LocalInstantiationScope *CurrentInstantiationScope; 5027 5028 /// \brief The number of typos corrected by CorrectTypo. 5029 unsigned TyposCorrected; 5030 5031 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 5032 UnqualifiedTyposCorrectedMap; 5033 5034 /// \brief A cache containing the results of typo correction for unqualified 5035 /// name lookup. 5036 /// 5037 /// The string is the string that we corrected to (which may be empty, if 5038 /// there was no correction), while the boolean will be true when the 5039 /// string represents a keyword. 5040 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 5041 5042 /// \brief Worker object for performing CFG-based warnings. 5043 sema::AnalysisBasedWarnings AnalysisWarnings; 5044 5045 /// \brief An entity for which implicit template instantiation is required. 5046 /// 5047 /// The source location associated with the declaration is the first place in 5048 /// the source code where the declaration was "used". It is not necessarily 5049 /// the point of instantiation (which will be either before or after the 5050 /// namespace-scope declaration that triggered this implicit instantiation), 5051 /// However, it is the location that diagnostics should generally refer to, 5052 /// because users will need to know what code triggered the instantiation. 5053 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 5054 5055 /// \brief The queue of implicit template instantiations that are required 5056 /// but have not yet been performed. 5057 std::deque<PendingImplicitInstantiation> PendingInstantiations; 5058 5059 /// \brief The queue of implicit template instantiations that are required 5060 /// and must be performed within the current local scope. 5061 /// 5062 /// This queue is only used for member functions of local classes in 5063 /// templates, which must be instantiated in the same scope as their 5064 /// enclosing function, so that they can reference function-local 5065 /// types, static variables, enumerators, etc. 5066 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 5067 5068 void PerformPendingInstantiations(bool LocalOnly = false); 5069 5070 TypeSourceInfo *SubstType(TypeSourceInfo *T, 5071 const MultiLevelTemplateArgumentList &TemplateArgs, 5072 SourceLocation Loc, DeclarationName Entity); 5073 5074 QualType SubstType(QualType T, 5075 const MultiLevelTemplateArgumentList &TemplateArgs, 5076 SourceLocation Loc, DeclarationName Entity); 5077 5078 TypeSourceInfo *SubstType(TypeLoc TL, 5079 const MultiLevelTemplateArgumentList &TemplateArgs, 5080 SourceLocation Loc, DeclarationName Entity); 5081 5082 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 5083 const MultiLevelTemplateArgumentList &TemplateArgs, 5084 SourceLocation Loc, 5085 DeclarationName Entity); 5086 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 5087 const MultiLevelTemplateArgumentList &TemplateArgs, 5088 int indexAdjustment, 5089 llvm::Optional<unsigned> NumExpansions); 5090 bool SubstParmTypes(SourceLocation Loc, 5091 ParmVarDecl **Params, unsigned NumParams, 5092 const MultiLevelTemplateArgumentList &TemplateArgs, 5093 SmallVectorImpl<QualType> &ParamTypes, 5094 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 5095 ExprResult SubstExpr(Expr *E, 5096 const MultiLevelTemplateArgumentList &TemplateArgs); 5097 5098 /// \brief Substitute the given template arguments into a list of 5099 /// expressions, expanding pack expansions if required. 5100 /// 5101 /// \param Exprs The list of expressions to substitute into. 5102 /// 5103 /// \param NumExprs The number of expressions in \p Exprs. 5104 /// 5105 /// \param IsCall Whether this is some form of call, in which case 5106 /// default arguments will be dropped. 5107 /// 5108 /// \param TemplateArgs The set of template arguments to substitute. 5109 /// 5110 /// \param Outputs Will receive all of the substituted arguments. 5111 /// 5112 /// \returns true if an error occurred, false otherwise. 5113 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 5114 const MultiLevelTemplateArgumentList &TemplateArgs, 5115 SmallVectorImpl<Expr *> &Outputs); 5116 5117 StmtResult SubstStmt(Stmt *S, 5118 const MultiLevelTemplateArgumentList &TemplateArgs); 5119 5120 Decl *SubstDecl(Decl *D, DeclContext *Owner, 5121 const MultiLevelTemplateArgumentList &TemplateArgs); 5122 5123 bool 5124 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 5125 CXXRecordDecl *Pattern, 5126 const MultiLevelTemplateArgumentList &TemplateArgs); 5127 5128 bool 5129 InstantiateClass(SourceLocation PointOfInstantiation, 5130 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 5131 const MultiLevelTemplateArgumentList &TemplateArgs, 5132 TemplateSpecializationKind TSK, 5133 bool Complain = true); 5134 5135 struct LateInstantiatedAttribute { 5136 const Attr *TmplAttr; 5137 LocalInstantiationScope *Scope; 5138 Decl *NewDecl; 5139 5140 LateInstantiatedAttribute(const Attr *A, LocalInstantiationScope *S, 5141 Decl *D) 5142 : TmplAttr(A), Scope(S), NewDecl(D) 5143 { } 5144 }; 5145 typedef SmallVector<LateInstantiatedAttribute, 16> LateInstantiatedAttrVec; 5146 5147 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 5148 const Decl *Pattern, Decl *Inst, 5149 LateInstantiatedAttrVec *LateAttrs = 0, 5150 LocalInstantiationScope *OuterMostScope = 0); 5151 5152 bool 5153 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 5154 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5155 TemplateSpecializationKind TSK, 5156 bool Complain = true); 5157 5158 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 5159 CXXRecordDecl *Instantiation, 5160 const MultiLevelTemplateArgumentList &TemplateArgs, 5161 TemplateSpecializationKind TSK); 5162 5163 void InstantiateClassTemplateSpecializationMembers( 5164 SourceLocation PointOfInstantiation, 5165 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5166 TemplateSpecializationKind TSK); 5167 5168 NestedNameSpecifierLoc 5169 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 5170 const MultiLevelTemplateArgumentList &TemplateArgs); 5171 5172 DeclarationNameInfo 5173 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 5174 const MultiLevelTemplateArgumentList &TemplateArgs); 5175 TemplateName 5176 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 5177 SourceLocation Loc, 5178 const MultiLevelTemplateArgumentList &TemplateArgs); 5179 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 5180 TemplateArgumentListInfo &Result, 5181 const MultiLevelTemplateArgumentList &TemplateArgs); 5182 5183 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 5184 FunctionDecl *Function, 5185 bool Recursive = false, 5186 bool DefinitionRequired = false); 5187 void InstantiateStaticDataMemberDefinition( 5188 SourceLocation PointOfInstantiation, 5189 VarDecl *Var, 5190 bool Recursive = false, 5191 bool DefinitionRequired = false); 5192 5193 void InstantiateMemInitializers(CXXConstructorDecl *New, 5194 const CXXConstructorDecl *Tmpl, 5195 const MultiLevelTemplateArgumentList &TemplateArgs); 5196 bool InstantiateInitializer(Expr *Init, 5197 const MultiLevelTemplateArgumentList &TemplateArgs, 5198 SourceLocation &LParenLoc, 5199 ASTOwningVector<Expr*> &NewArgs, 5200 SourceLocation &RParenLoc); 5201 5202 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 5203 const MultiLevelTemplateArgumentList &TemplateArgs); 5204 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 5205 const MultiLevelTemplateArgumentList &TemplateArgs); 5206 5207 // Objective-C declarations. 5208 enum ObjCContainerKind { 5209 OCK_None = -1, 5210 OCK_Interface = 0, 5211 OCK_Protocol, 5212 OCK_Category, 5213 OCK_ClassExtension, 5214 OCK_Implementation, 5215 OCK_CategoryImplementation 5216 }; 5217 ObjCContainerKind getObjCContainerKind() const; 5218 5219 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 5220 IdentifierInfo *ClassName, 5221 SourceLocation ClassLoc, 5222 IdentifierInfo *SuperName, 5223 SourceLocation SuperLoc, 5224 Decl * const *ProtoRefs, 5225 unsigned NumProtoRefs, 5226 const SourceLocation *ProtoLocs, 5227 SourceLocation EndProtoLoc, 5228 AttributeList *AttrList); 5229 5230 Decl *ActOnCompatiblityAlias( 5231 SourceLocation AtCompatibilityAliasLoc, 5232 IdentifierInfo *AliasName, SourceLocation AliasLocation, 5233 IdentifierInfo *ClassName, SourceLocation ClassLocation); 5234 5235 bool CheckForwardProtocolDeclarationForCircularDependency( 5236 IdentifierInfo *PName, 5237 SourceLocation &PLoc, SourceLocation PrevLoc, 5238 const ObjCList<ObjCProtocolDecl> &PList); 5239 5240 Decl *ActOnStartProtocolInterface( 5241 SourceLocation AtProtoInterfaceLoc, 5242 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 5243 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 5244 const SourceLocation *ProtoLocs, 5245 SourceLocation EndProtoLoc, 5246 AttributeList *AttrList); 5247 5248 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 5249 IdentifierInfo *ClassName, 5250 SourceLocation ClassLoc, 5251 IdentifierInfo *CategoryName, 5252 SourceLocation CategoryLoc, 5253 Decl * const *ProtoRefs, 5254 unsigned NumProtoRefs, 5255 const SourceLocation *ProtoLocs, 5256 SourceLocation EndProtoLoc); 5257 5258 Decl *ActOnStartClassImplementation( 5259 SourceLocation AtClassImplLoc, 5260 IdentifierInfo *ClassName, SourceLocation ClassLoc, 5261 IdentifierInfo *SuperClassname, 5262 SourceLocation SuperClassLoc); 5263 5264 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 5265 IdentifierInfo *ClassName, 5266 SourceLocation ClassLoc, 5267 IdentifierInfo *CatName, 5268 SourceLocation CatLoc); 5269 5270 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc, 5271 IdentifierInfo **IdentList, 5272 SourceLocation *IdentLocs, 5273 unsigned NumElts); 5274 5275 DeclGroupPtrTy ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 5276 const IdentifierLocPair *IdentList, 5277 unsigned NumElts, 5278 AttributeList *attrList); 5279 5280 void FindProtocolDeclaration(bool WarnOnDeclarations, 5281 const IdentifierLocPair *ProtocolId, 5282 unsigned NumProtocols, 5283 SmallVectorImpl<Decl *> &Protocols); 5284 5285 /// Ensure attributes are consistent with type. 5286 /// \param [in, out] Attributes The attributes to check; they will 5287 /// be modified to be consistent with \arg PropertyTy. 5288 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5289 SourceLocation Loc, 5290 unsigned &Attributes); 5291 5292 /// Process the specified property declaration and create decls for the 5293 /// setters and getters as needed. 5294 /// \param property The property declaration being processed 5295 /// \param DC The semantic container for the property 5296 /// \param redeclaredProperty Declaration for property if redeclared 5297 /// in class extension. 5298 /// \param lexicalDC Container for redeclaredProperty. 5299 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5300 ObjCContainerDecl *DC, 5301 ObjCPropertyDecl *redeclaredProperty = 0, 5302 ObjCContainerDecl *lexicalDC = 0); 5303 5304 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5305 ObjCPropertyDecl *SuperProperty, 5306 const IdentifierInfo *Name); 5307 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5308 5309 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5310 ObjCMethodDecl *MethodDecl, 5311 bool IsInstance); 5312 5313 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5314 5315 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5316 ObjCInterfaceDecl *ID); 5317 5318 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5319 ObjCProtocolDecl *PDecl); 5320 5321 Decl *ActOnAtEnd(Scope *S, SourceRange AtEnd, 5322 Decl **allMethods = 0, unsigned allNum = 0, 5323 Decl **allProperties = 0, unsigned pNum = 0, 5324 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5325 5326 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5327 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5328 Selector GetterSel, Selector SetterSel, 5329 bool *OverridingProperty, 5330 tok::ObjCKeywordKind MethodImplKind, 5331 DeclContext *lexicalDC = 0); 5332 5333 Decl *ActOnPropertyImplDecl(Scope *S, 5334 SourceLocation AtLoc, 5335 SourceLocation PropertyLoc, 5336 bool ImplKind, 5337 IdentifierInfo *PropertyId, 5338 IdentifierInfo *PropertyIvar, 5339 SourceLocation PropertyIvarLoc); 5340 5341 enum ObjCSpecialMethodKind { 5342 OSMK_None, 5343 OSMK_Alloc, 5344 OSMK_New, 5345 OSMK_Copy, 5346 OSMK_RetainingInit, 5347 OSMK_NonRetainingInit 5348 }; 5349 5350 struct ObjCArgInfo { 5351 IdentifierInfo *Name; 5352 SourceLocation NameLoc; 5353 // The Type is null if no type was specified, and the DeclSpec is invalid 5354 // in this case. 5355 ParsedType Type; 5356 ObjCDeclSpec DeclSpec; 5357 5358 /// ArgAttrs - Attribute list for this argument. 5359 AttributeList *ArgAttrs; 5360 }; 5361 5362 Decl *ActOnMethodDeclaration( 5363 Scope *S, 5364 SourceLocation BeginLoc, // location of the + or -. 5365 SourceLocation EndLoc, // location of the ; or {. 5366 tok::TokenKind MethodType, 5367 ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5368 ArrayRef<SourceLocation> SelectorLocs, Selector Sel, 5369 // optional arguments. The number of types/arguments is obtained 5370 // from the Sel.getNumArgs(). 5371 ObjCArgInfo *ArgInfo, 5372 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5373 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5374 bool isVariadic, bool MethodDefinition); 5375 5376 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5377 // Will search "local" class/category implementations for a method decl. 5378 // Will also search in class's root looking for instance method. 5379 // Returns 0 if no method is found. 5380 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5381 ObjCInterfaceDecl *CDecl); 5382 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5383 ObjCInterfaceDecl *ClassDecl); 5384 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5385 const ObjCObjectPointerType *OPT, 5386 bool IsInstance); 5387 ObjCMethodDecl *LookupMethodInObjectType(Selector Sel, QualType Ty, 5388 bool IsInstance); 5389 5390 bool inferObjCARCLifetime(ValueDecl *decl); 5391 5392 ExprResult 5393 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5394 Expr *BaseExpr, 5395 SourceLocation OpLoc, 5396 DeclarationName MemberName, 5397 SourceLocation MemberLoc, 5398 SourceLocation SuperLoc, QualType SuperType, 5399 bool Super); 5400 5401 ExprResult 5402 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5403 IdentifierInfo &propertyName, 5404 SourceLocation receiverNameLoc, 5405 SourceLocation propertyNameLoc); 5406 5407 ObjCMethodDecl *tryCaptureObjCSelf(); 5408 5409 /// \brief Describes the kind of message expression indicated by a message 5410 /// send that starts with an identifier. 5411 enum ObjCMessageKind { 5412 /// \brief The message is sent to 'super'. 5413 ObjCSuperMessage, 5414 /// \brief The message is an instance message. 5415 ObjCInstanceMessage, 5416 /// \brief The message is a class message, and the identifier is a type 5417 /// name. 5418 ObjCClassMessage 5419 }; 5420 5421 ObjCMessageKind getObjCMessageKind(Scope *S, 5422 IdentifierInfo *Name, 5423 SourceLocation NameLoc, 5424 bool IsSuper, 5425 bool HasTrailingDot, 5426 ParsedType &ReceiverType); 5427 5428 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5429 Selector Sel, 5430 SourceLocation LBracLoc, 5431 ArrayRef<SourceLocation> SelectorLocs, 5432 SourceLocation RBracLoc, 5433 MultiExprArg Args); 5434 5435 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5436 QualType ReceiverType, 5437 SourceLocation SuperLoc, 5438 Selector Sel, 5439 ObjCMethodDecl *Method, 5440 SourceLocation LBracLoc, 5441 ArrayRef<SourceLocation> SelectorLocs, 5442 SourceLocation RBracLoc, 5443 MultiExprArg Args, 5444 bool isImplicit = false); 5445 5446 ExprResult BuildClassMessageImplicit(QualType ReceiverType, 5447 bool isSuperReceiver, 5448 SourceLocation Loc, 5449 Selector Sel, 5450 ObjCMethodDecl *Method, 5451 MultiExprArg Args); 5452 5453 ExprResult ActOnClassMessage(Scope *S, 5454 ParsedType Receiver, 5455 Selector Sel, 5456 SourceLocation LBracLoc, 5457 ArrayRef<SourceLocation> SelectorLocs, 5458 SourceLocation RBracLoc, 5459 MultiExprArg Args); 5460 5461 ExprResult BuildInstanceMessage(Expr *Receiver, 5462 QualType ReceiverType, 5463 SourceLocation SuperLoc, 5464 Selector Sel, 5465 ObjCMethodDecl *Method, 5466 SourceLocation LBracLoc, 5467 ArrayRef<SourceLocation> SelectorLocs, 5468 SourceLocation RBracLoc, 5469 MultiExprArg Args, 5470 bool isImplicit = false); 5471 5472 ExprResult BuildInstanceMessageImplicit(Expr *Receiver, 5473 QualType ReceiverType, 5474 SourceLocation Loc, 5475 Selector Sel, 5476 ObjCMethodDecl *Method, 5477 MultiExprArg Args); 5478 5479 ExprResult ActOnInstanceMessage(Scope *S, 5480 Expr *Receiver, 5481 Selector Sel, 5482 SourceLocation LBracLoc, 5483 ArrayRef<SourceLocation> SelectorLocs, 5484 SourceLocation RBracLoc, 5485 MultiExprArg Args); 5486 5487 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5488 ObjCBridgeCastKind Kind, 5489 SourceLocation BridgeKeywordLoc, 5490 TypeSourceInfo *TSInfo, 5491 Expr *SubExpr); 5492 5493 ExprResult ActOnObjCBridgedCast(Scope *S, 5494 SourceLocation LParenLoc, 5495 ObjCBridgeCastKind Kind, 5496 SourceLocation BridgeKeywordLoc, 5497 ParsedType Type, 5498 SourceLocation RParenLoc, 5499 Expr *SubExpr); 5500 5501 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5502 5503 /// \brief Check whether the given new method is a valid override of the 5504 /// given overridden method, and set any properties that should be inherited. 5505 void CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5506 const ObjCMethodDecl *Overridden, 5507 bool IsImplementation); 5508 5509 /// \brief Check whether the given method overrides any methods in its class, 5510 /// calling \c CheckObjCMethodOverride for each overridden method. 5511 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5512 5513 enum PragmaOptionsAlignKind { 5514 POAK_Native, // #pragma options align=native 5515 POAK_Natural, // #pragma options align=natural 5516 POAK_Packed, // #pragma options align=packed 5517 POAK_Power, // #pragma options align=power 5518 POAK_Mac68k, // #pragma options align=mac68k 5519 POAK_Reset // #pragma options align=reset 5520 }; 5521 5522 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5523 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5524 SourceLocation PragmaLoc, 5525 SourceLocation KindLoc); 5526 5527 enum PragmaPackKind { 5528 PPK_Default, // #pragma pack([n]) 5529 PPK_Show, // #pragma pack(show), only supported by MSVC. 5530 PPK_Push, // #pragma pack(push, [identifier], [n]) 5531 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5532 }; 5533 5534 enum PragmaMSStructKind { 5535 PMSST_OFF, // #pragms ms_struct off 5536 PMSST_ON // #pragms ms_struct on 5537 }; 5538 5539 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5540 void ActOnPragmaPack(PragmaPackKind Kind, 5541 IdentifierInfo *Name, 5542 Expr *Alignment, 5543 SourceLocation PragmaLoc, 5544 SourceLocation LParenLoc, 5545 SourceLocation RParenLoc); 5546 5547 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5548 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5549 5550 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5551 void ActOnPragmaUnused(const Token &Identifier, 5552 Scope *curScope, 5553 SourceLocation PragmaLoc); 5554 5555 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5556 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 5557 SourceLocation PragmaLoc); 5558 5559 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II, 5560 SourceLocation Loc); 5561 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5562 5563 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5564 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5565 SourceLocation PragmaLoc, 5566 SourceLocation WeakNameLoc); 5567 5568 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5569 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5570 IdentifierInfo* AliasName, 5571 SourceLocation PragmaLoc, 5572 SourceLocation WeakNameLoc, 5573 SourceLocation AliasNameLoc); 5574 5575 /// ActOnPragmaFPContract - Called on well formed 5576 /// #pragma {STDC,OPENCL} FP_CONTRACT 5577 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5578 5579 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5580 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5581 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5582 5583 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5584 void AddMsStructLayoutForRecord(RecordDecl *RD); 5585 5586 /// FreePackedContext - Deallocate and null out PackContext. 5587 void FreePackedContext(); 5588 5589 /// PushNamespaceVisibilityAttr - Note that we've entered a 5590 /// namespace with a visibility attribute. 5591 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 5592 5593 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5594 /// add an appropriate visibility attribute. 5595 void AddPushedVisibilityAttribute(Decl *RD); 5596 5597 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5598 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5599 void PopPragmaVisibility(); 5600 5601 /// FreeVisContext - Deallocate and null out VisContext. 5602 void FreeVisContext(); 5603 5604 /// AddCFAuditedAttribute - Check whether we're currently within 5605 /// '#pragma clang arc_cf_code_audited' and, if so, consider adding 5606 /// the appropriate attribute. 5607 void AddCFAuditedAttribute(Decl *D); 5608 5609 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5610 void AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E); 5611 void AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *T); 5612 5613 /// \brief The kind of conversion being performed. 5614 enum CheckedConversionKind { 5615 /// \brief An implicit conversion. 5616 CCK_ImplicitConversion, 5617 /// \brief A C-style cast. 5618 CCK_CStyleCast, 5619 /// \brief A functional-style cast. 5620 CCK_FunctionalCast, 5621 /// \brief A cast other than a C-style cast. 5622 CCK_OtherCast 5623 }; 5624 5625 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5626 /// cast. If there is already an implicit cast, merge into the existing one. 5627 /// If isLvalue, the result of the cast is an lvalue. 5628 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5629 ExprValueKind VK = VK_RValue, 5630 const CXXCastPath *BasePath = 0, 5631 CheckedConversionKind CCK 5632 = CCK_ImplicitConversion); 5633 5634 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5635 /// to the conversion from scalar type ScalarTy to the Boolean type. 5636 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5637 5638 /// IgnoredValueConversions - Given that an expression's result is 5639 /// syntactically ignored, perform any conversions that are 5640 /// required. 5641 ExprResult IgnoredValueConversions(Expr *E); 5642 5643 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5644 // functions and arrays to their respective pointers (C99 6.3.2.1). 5645 ExprResult UsualUnaryConversions(Expr *E); 5646 5647 // DefaultFunctionArrayConversion - converts functions and arrays 5648 // to their respective pointers (C99 6.3.2.1). 5649 ExprResult DefaultFunctionArrayConversion(Expr *E); 5650 5651 // DefaultFunctionArrayLvalueConversion - converts functions and 5652 // arrays to their respective pointers and performs the 5653 // lvalue-to-rvalue conversion. 5654 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5655 5656 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5657 // the operand. This is DefaultFunctionArrayLvalueConversion, 5658 // except that it assumes the operand isn't of function or array 5659 // type. 5660 ExprResult DefaultLvalueConversion(Expr *E); 5661 5662 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5663 // do not have a prototype. Integer promotions are performed on each 5664 // argument, and arguments that have type float are promoted to double. 5665 ExprResult DefaultArgumentPromotion(Expr *E); 5666 5667 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5668 enum VariadicCallType { 5669 VariadicFunction, 5670 VariadicBlock, 5671 VariadicMethod, 5672 VariadicConstructor, 5673 VariadicDoesNotApply 5674 }; 5675 5676 /// GatherArgumentsForCall - Collector argument expressions for various 5677 /// form of call prototypes. 5678 bool GatherArgumentsForCall(SourceLocation CallLoc, 5679 FunctionDecl *FDecl, 5680 const FunctionProtoType *Proto, 5681 unsigned FirstProtoArg, 5682 Expr **Args, unsigned NumArgs, 5683 SmallVector<Expr *, 8> &AllArgs, 5684 VariadicCallType CallType = VariadicDoesNotApply); 5685 5686 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5687 // will warn if the resulting type is not a POD type. 5688 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5689 FunctionDecl *FDecl); 5690 5691 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5692 // operands and then handles various conversions that are common to binary 5693 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5694 // routine returns the first non-arithmetic type found. The client is 5695 // responsible for emitting appropriate error diagnostics. 5696 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS, 5697 bool IsCompAssign = false); 5698 5699 /// AssignConvertType - All of the 'assignment' semantic checks return this 5700 /// enum to indicate whether the assignment was allowed. These checks are 5701 /// done for simple assignments, as well as initialization, return from 5702 /// function, argument passing, etc. The query is phrased in terms of a 5703 /// source and destination type. 5704 enum AssignConvertType { 5705 /// Compatible - the types are compatible according to the standard. 5706 Compatible, 5707 5708 /// PointerToInt - The assignment converts a pointer to an int, which we 5709 /// accept as an extension. 5710 PointerToInt, 5711 5712 /// IntToPointer - The assignment converts an int to a pointer, which we 5713 /// accept as an extension. 5714 IntToPointer, 5715 5716 /// FunctionVoidPointer - The assignment is between a function pointer and 5717 /// void*, which the standard doesn't allow, but we accept as an extension. 5718 FunctionVoidPointer, 5719 5720 /// IncompatiblePointer - The assignment is between two pointers types that 5721 /// are not compatible, but we accept them as an extension. 5722 IncompatiblePointer, 5723 5724 /// IncompatiblePointer - The assignment is between two pointers types which 5725 /// point to integers which have a different sign, but are otherwise 5726 /// identical. This is a subset of the above, but broken out because it's by 5727 /// far the most common case of incompatible pointers. 5728 IncompatiblePointerSign, 5729 5730 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5731 /// c/v/r qualifiers, which we accept as an extension. 5732 CompatiblePointerDiscardsQualifiers, 5733 5734 /// IncompatiblePointerDiscardsQualifiers - The assignment 5735 /// discards qualifiers that we don't permit to be discarded, 5736 /// like address spaces. 5737 IncompatiblePointerDiscardsQualifiers, 5738 5739 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5740 /// nested pointer types, and the qualifiers other than the first two 5741 /// levels differ e.g. char ** -> const char **, but we accept them as an 5742 /// extension. 5743 IncompatibleNestedPointerQualifiers, 5744 5745 /// IncompatibleVectors - The assignment is between two vector types that 5746 /// have the same size, which we accept as an extension. 5747 IncompatibleVectors, 5748 5749 /// IntToBlockPointer - The assignment converts an int to a block 5750 /// pointer. We disallow this. 5751 IntToBlockPointer, 5752 5753 /// IncompatibleBlockPointer - The assignment is between two block 5754 /// pointers types that are not compatible. 5755 IncompatibleBlockPointer, 5756 5757 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5758 /// id type and something else (that is incompatible with it). For example, 5759 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5760 IncompatibleObjCQualifiedId, 5761 5762 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 5763 /// object with __weak qualifier. 5764 IncompatibleObjCWeakRef, 5765 5766 /// Incompatible - We reject this conversion outright, it is invalid to 5767 /// represent it in the AST. 5768 Incompatible 5769 }; 5770 5771 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5772 /// assignment conversion type specified by ConvTy. This returns true if the 5773 /// conversion was invalid or false if the conversion was accepted. 5774 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5775 SourceLocation Loc, 5776 QualType DstType, QualType SrcType, 5777 Expr *SrcExpr, AssignmentAction Action, 5778 bool *Complained = 0); 5779 5780 /// CheckAssignmentConstraints - Perform type checking for assignment, 5781 /// argument passing, variable initialization, and function return values. 5782 /// C99 6.5.16. 5783 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5784 QualType LHSType, 5785 QualType RHSType); 5786 5787 /// Check assignment constraints and prepare for a conversion of the 5788 /// RHS to the LHS type. 5789 AssignConvertType CheckAssignmentConstraints(QualType LHSType, 5790 ExprResult &RHS, 5791 CastKind &Kind); 5792 5793 // CheckSingleAssignmentConstraints - Currently used by 5794 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5795 // this routine performs the default function/array converions. 5796 AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType, 5797 ExprResult &RHS, 5798 bool Diagnose = true); 5799 5800 // \brief If the lhs type is a transparent union, check whether we 5801 // can initialize the transparent union with the given expression. 5802 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType, 5803 ExprResult &RHS); 5804 5805 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5806 5807 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5808 5809 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5810 AssignmentAction Action, 5811 bool AllowExplicit = false); 5812 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5813 AssignmentAction Action, 5814 bool AllowExplicit, 5815 ImplicitConversionSequence& ICS); 5816 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5817 const ImplicitConversionSequence& ICS, 5818 AssignmentAction Action, 5819 CheckedConversionKind CCK 5820 = CCK_ImplicitConversion); 5821 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5822 const StandardConversionSequence& SCS, 5823 AssignmentAction Action, 5824 CheckedConversionKind CCK); 5825 5826 /// the following "Check" methods will return a valid/converted QualType 5827 /// or a null QualType (indicating an error diagnostic was issued). 5828 5829 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5830 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS, 5831 ExprResult &RHS); 5832 QualType CheckPointerToMemberOperands( // C++ 5.5 5833 ExprResult &LHS, ExprResult &RHS, ExprValueKind &VK, 5834 SourceLocation OpLoc, bool isIndirect); 5835 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5836 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign, 5837 bool IsDivide); 5838 QualType CheckRemainderOperands( // C99 6.5.5 5839 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5840 bool IsCompAssign = false); 5841 QualType CheckAdditionOperands( // C99 6.5.6 5842 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5843 QualType* CompLHSTy = 0); 5844 QualType CheckSubtractionOperands( // C99 6.5.6 5845 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5846 QualType* CompLHSTy = 0); 5847 QualType CheckShiftOperands( // C99 6.5.7 5848 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 5849 bool IsCompAssign = false); 5850 QualType CheckCompareOperands( // C99 6.5.8/9 5851 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned OpaqueOpc, 5852 bool isRelational); 5853 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 5854 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5855 bool IsCompAssign = false); 5856 QualType CheckLogicalOperands( // C99 6.5.[13,14] 5857 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc); 5858 // CheckAssignmentOperands is used for both simple and compound assignment. 5859 // For simple assignment, pass both expressions and a null converted type. 5860 // For compound assignment, pass both expressions and the converted type. 5861 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 5862 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType); 5863 5864 ExprResult checkPseudoObjectIncDec(Scope *S, SourceLocation OpLoc, 5865 UnaryOperatorKind Opcode, Expr *Op); 5866 ExprResult checkPseudoObjectAssignment(Scope *S, SourceLocation OpLoc, 5867 BinaryOperatorKind Opcode, 5868 Expr *LHS, Expr *RHS); 5869 ExprResult checkPseudoObjectRValue(Expr *E); 5870 Expr *recreateSyntacticForm(PseudoObjectExpr *E); 5871 5872 QualType CheckConditionalOperands( // C99 6.5.15 5873 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS, 5874 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc); 5875 QualType CXXCheckConditionalOperands( // C++ 5.16 5876 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5877 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5878 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 5879 bool *NonStandardCompositeType = 0); 5880 QualType FindCompositePointerType(SourceLocation Loc, 5881 ExprResult &E1, ExprResult &E2, 5882 bool *NonStandardCompositeType = 0) { 5883 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 5884 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, 5885 NonStandardCompositeType); 5886 E1 = Owned(E1Tmp); 5887 E2 = Owned(E2Tmp); 5888 return Composite; 5889 } 5890 5891 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5892 SourceLocation QuestionLoc); 5893 5894 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr, 5895 SourceLocation QuestionLoc); 5896 5897 /// type checking for vector binary operators. 5898 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS, 5899 SourceLocation Loc, bool IsCompAssign); 5900 QualType GetSignedVectorType(QualType V); 5901 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS, 5902 SourceLocation Loc, bool isRelational); 5903 QualType CheckVectorLogicalOperands(ExprResult &LHS, ExprResult &RHS, 5904 SourceLocation Loc); 5905 5906 /// type checking declaration initializers (C99 6.7.8) 5907 bool CheckForConstantInitializer(Expr *e, QualType t); 5908 5909 // type checking C++ declaration initializers (C++ [dcl.init]). 5910 5911 /// ReferenceCompareResult - Expresses the result of comparing two 5912 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5913 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5914 enum ReferenceCompareResult { 5915 /// Ref_Incompatible - The two types are incompatible, so direct 5916 /// reference binding is not possible. 5917 Ref_Incompatible = 0, 5918 /// Ref_Related - The two types are reference-related, which means 5919 /// that their unqualified forms (T1 and T2) are either the same 5920 /// or T1 is a base class of T2. 5921 Ref_Related, 5922 /// Ref_Compatible_With_Added_Qualification - The two types are 5923 /// reference-compatible with added qualification, meaning that 5924 /// they are reference-compatible and the qualifiers on T1 (cv1) 5925 /// are greater than the qualifiers on T2 (cv2). 5926 Ref_Compatible_With_Added_Qualification, 5927 /// Ref_Compatible - The two types are reference-compatible and 5928 /// have equivalent qualifiers (cv1 == cv2). 5929 Ref_Compatible 5930 }; 5931 5932 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 5933 QualType T1, QualType T2, 5934 bool &DerivedToBase, 5935 bool &ObjCConversion, 5936 bool &ObjCLifetimeConversion); 5937 5938 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType, 5939 Expr *CastExpr, CastKind &CastKind, 5940 ExprValueKind &VK, CXXCastPath &Path); 5941 5942 /// \brief Force an expression with unknown-type to an expression of the 5943 /// given type. 5944 ExprResult forceUnknownAnyToType(Expr *E, QualType ToType); 5945 5946 // CheckVectorCast - check type constraints for vectors. 5947 // Since vectors are an extension, there are no C standard reference for this. 5948 // We allow casting between vectors and integer datatypes of the same size. 5949 // returns true if the cast is invalid 5950 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 5951 CastKind &Kind); 5952 5953 // CheckExtVectorCast - check type constraints for extended vectors. 5954 // Since vectors are an extension, there are no C standard reference for this. 5955 // We allow casting between vectors and integer datatypes of the same size, 5956 // or vectors and the element type of that vector. 5957 // returns the cast expr 5958 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr, 5959 CastKind &Kind); 5960 5961 ExprResult BuildCXXFunctionalCastExpr(TypeSourceInfo *TInfo, 5962 SourceLocation LParenLoc, 5963 Expr *CastExpr, 5964 SourceLocation RParenLoc); 5965 5966 enum ARCConversionResult { ACR_okay, ACR_unbridged }; 5967 5968 /// \brief Checks for invalid conversions and casts between 5969 /// retainable pointers and other pointer kinds. 5970 ARCConversionResult CheckObjCARCConversion(SourceRange castRange, 5971 QualType castType, Expr *&op, 5972 CheckedConversionKind CCK); 5973 5974 Expr *stripARCUnbridgedCast(Expr *e); 5975 void diagnoseARCUnbridgedCast(Expr *e); 5976 5977 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 5978 QualType ExprType); 5979 5980 /// checkRetainCycles - Check whether an Objective-C message send 5981 /// might create an obvious retain cycle. 5982 void checkRetainCycles(ObjCMessageExpr *msg); 5983 void checkRetainCycles(Expr *receiver, Expr *argument); 5984 5985 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 5986 /// to weak/__unsafe_unretained type. 5987 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 5988 5989 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 5990 /// to weak/__unsafe_unretained expression. 5991 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 5992 5993 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 5994 /// \param Method - May be null. 5995 /// \param [out] ReturnType - The return type of the send. 5996 /// \return true iff there were any incompatible types. 5997 bool CheckMessageArgumentTypes(QualType ReceiverType, 5998 Expr **Args, unsigned NumArgs, Selector Sel, 5999 ObjCMethodDecl *Method, bool isClassMessage, 6000 bool isSuperMessage, 6001 SourceLocation lbrac, SourceLocation rbrac, 6002 QualType &ReturnType, ExprValueKind &VK); 6003 6004 /// \brief Determine the result of a message send expression based on 6005 /// the type of the receiver, the method expected to receive the message, 6006 /// and the form of the message send. 6007 QualType getMessageSendResultType(QualType ReceiverType, 6008 ObjCMethodDecl *Method, 6009 bool isClassMessage, bool isSuperMessage); 6010 6011 /// \brief If the given expression involves a message send to a method 6012 /// with a related result type, emit a note describing what happened. 6013 void EmitRelatedResultTypeNote(const Expr *E); 6014 6015 /// CheckBooleanCondition - Diagnose problems involving the use of 6016 /// the given expression as a boolean condition (e.g. in an if 6017 /// statement). Also performs the standard function and array 6018 /// decays, possibly changing the input variable. 6019 /// 6020 /// \param Loc - A location associated with the condition, e.g. the 6021 /// 'if' keyword. 6022 /// \return true iff there were any errors 6023 ExprResult CheckBooleanCondition(Expr *E, SourceLocation Loc); 6024 6025 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 6026 Expr *SubExpr); 6027 6028 /// DiagnoseAssignmentAsCondition - Given that an expression is 6029 /// being used as a boolean condition, warn if it's an assignment. 6030 void DiagnoseAssignmentAsCondition(Expr *E); 6031 6032 /// \brief Redundant parentheses over an equality comparison can indicate 6033 /// that the user intended an assignment used as condition. 6034 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE); 6035 6036 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 6037 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 6038 6039 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 6040 /// the specified width and sign. If an overflow occurs, detect it and emit 6041 /// the specified diagnostic. 6042 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 6043 unsigned NewWidth, bool NewSign, 6044 SourceLocation Loc, unsigned DiagID); 6045 6046 /// Checks that the Objective-C declaration is declared in the global scope. 6047 /// Emits an error and marks the declaration as invalid if it's not declared 6048 /// in the global scope. 6049 bool CheckObjCDeclScope(Decl *D); 6050 6051 /// VerifyIntegerConstantExpression - Verifies that an expression is an ICE, 6052 /// and reports the appropriate diagnostics. Returns false on success. 6053 /// Can optionally return the value of the expression. 6054 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0, 6055 unsigned DiagId = 0, 6056 bool AllowFold = true); 6057 6058 /// VerifyBitField - verifies that a bit field expression is an ICE and has 6059 /// the correct width, and that the field type is valid. 6060 /// Returns false on success. 6061 /// Can optionally return whether the bit-field is of width 0 6062 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 6063 QualType FieldTy, const Expr *BitWidth, 6064 bool *ZeroWidth = 0); 6065 6066 enum CUDAFunctionTarget { 6067 CFT_Device, 6068 CFT_Global, 6069 CFT_Host, 6070 CFT_HostDevice 6071 }; 6072 6073 CUDAFunctionTarget IdentifyCUDATarget(const FunctionDecl *D); 6074 6075 bool CheckCUDATarget(CUDAFunctionTarget CallerTarget, 6076 CUDAFunctionTarget CalleeTarget); 6077 6078 bool CheckCUDATarget(const FunctionDecl *Caller, const FunctionDecl *Callee) { 6079 return CheckCUDATarget(IdentifyCUDATarget(Caller), 6080 IdentifyCUDATarget(Callee)); 6081 } 6082 6083 /// \name Code completion 6084 //@{ 6085 /// \brief Describes the context in which code completion occurs. 6086 enum ParserCompletionContext { 6087 /// \brief Code completion occurs at top-level or namespace context. 6088 PCC_Namespace, 6089 /// \brief Code completion occurs within a class, struct, or union. 6090 PCC_Class, 6091 /// \brief Code completion occurs within an Objective-C interface, protocol, 6092 /// or category. 6093 PCC_ObjCInterface, 6094 /// \brief Code completion occurs within an Objective-C implementation or 6095 /// category implementation 6096 PCC_ObjCImplementation, 6097 /// \brief Code completion occurs within the list of instance variables 6098 /// in an Objective-C interface, protocol, category, or implementation. 6099 PCC_ObjCInstanceVariableList, 6100 /// \brief Code completion occurs following one or more template 6101 /// headers. 6102 PCC_Template, 6103 /// \brief Code completion occurs following one or more template 6104 /// headers within a class. 6105 PCC_MemberTemplate, 6106 /// \brief Code completion occurs within an expression. 6107 PCC_Expression, 6108 /// \brief Code completion occurs within a statement, which may 6109 /// also be an expression or a declaration. 6110 PCC_Statement, 6111 /// \brief Code completion occurs at the beginning of the 6112 /// initialization statement (or expression) in a for loop. 6113 PCC_ForInit, 6114 /// \brief Code completion occurs within the condition of an if, 6115 /// while, switch, or for statement. 6116 PCC_Condition, 6117 /// \brief Code completion occurs within the body of a function on a 6118 /// recovery path, where we do not have a specific handle on our position 6119 /// in the grammar. 6120 PCC_RecoveryInFunction, 6121 /// \brief Code completion occurs where only a type is permitted. 6122 PCC_Type, 6123 /// \brief Code completion occurs in a parenthesized expression, which 6124 /// might also be a type cast. 6125 PCC_ParenthesizedExpression, 6126 /// \brief Code completion occurs within a sequence of declaration 6127 /// specifiers within a function, method, or block. 6128 PCC_LocalDeclarationSpecifiers 6129 }; 6130 6131 void CodeCompleteOrdinaryName(Scope *S, 6132 ParserCompletionContext CompletionContext); 6133 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 6134 bool AllowNonIdentifiers, 6135 bool AllowNestedNameSpecifiers); 6136 6137 struct CodeCompleteExpressionData; 6138 void CodeCompleteExpression(Scope *S, 6139 const CodeCompleteExpressionData &Data); 6140 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 6141 SourceLocation OpLoc, 6142 bool IsArrow); 6143 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 6144 void CodeCompleteTag(Scope *S, unsigned TagSpec); 6145 void CodeCompleteTypeQualifiers(DeclSpec &DS); 6146 void CodeCompleteCase(Scope *S); 6147 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 6148 void CodeCompleteInitializer(Scope *S, Decl *D); 6149 void CodeCompleteReturn(Scope *S); 6150 void CodeCompleteAfterIf(Scope *S); 6151 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 6152 6153 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 6154 bool EnteringContext); 6155 void CodeCompleteUsing(Scope *S); 6156 void CodeCompleteUsingDirective(Scope *S); 6157 void CodeCompleteNamespaceDecl(Scope *S); 6158 void CodeCompleteNamespaceAliasDecl(Scope *S); 6159 void CodeCompleteOperatorName(Scope *S); 6160 void CodeCompleteConstructorInitializer(Decl *Constructor, 6161 CXXCtorInitializer** Initializers, 6162 unsigned NumInitializers); 6163 6164 void CodeCompleteObjCAtDirective(Scope *S); 6165 void CodeCompleteObjCAtVisibility(Scope *S); 6166 void CodeCompleteObjCAtStatement(Scope *S); 6167 void CodeCompleteObjCAtExpression(Scope *S); 6168 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 6169 void CodeCompleteObjCPropertyGetter(Scope *S); 6170 void CodeCompleteObjCPropertySetter(Scope *S); 6171 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 6172 bool IsParameter); 6173 void CodeCompleteObjCMessageReceiver(Scope *S); 6174 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 6175 IdentifierInfo **SelIdents, 6176 unsigned NumSelIdents, 6177 bool AtArgumentExpression); 6178 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 6179 IdentifierInfo **SelIdents, 6180 unsigned NumSelIdents, 6181 bool AtArgumentExpression, 6182 bool IsSuper = false); 6183 void CodeCompleteObjCInstanceMessage(Scope *S, Expr *Receiver, 6184 IdentifierInfo **SelIdents, 6185 unsigned NumSelIdents, 6186 bool AtArgumentExpression, 6187 ObjCInterfaceDecl *Super = 0); 6188 void CodeCompleteObjCForCollection(Scope *S, 6189 DeclGroupPtrTy IterationVar); 6190 void CodeCompleteObjCSelector(Scope *S, 6191 IdentifierInfo **SelIdents, 6192 unsigned NumSelIdents); 6193 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 6194 unsigned NumProtocols); 6195 void CodeCompleteObjCProtocolDecl(Scope *S); 6196 void CodeCompleteObjCInterfaceDecl(Scope *S); 6197 void CodeCompleteObjCSuperclass(Scope *S, 6198 IdentifierInfo *ClassName, 6199 SourceLocation ClassNameLoc); 6200 void CodeCompleteObjCImplementationDecl(Scope *S); 6201 void CodeCompleteObjCInterfaceCategory(Scope *S, 6202 IdentifierInfo *ClassName, 6203 SourceLocation ClassNameLoc); 6204 void CodeCompleteObjCImplementationCategory(Scope *S, 6205 IdentifierInfo *ClassName, 6206 SourceLocation ClassNameLoc); 6207 void CodeCompleteObjCPropertyDefinition(Scope *S); 6208 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 6209 IdentifierInfo *PropertyName); 6210 void CodeCompleteObjCMethodDecl(Scope *S, 6211 bool IsInstanceMethod, 6212 ParsedType ReturnType); 6213 void CodeCompleteObjCMethodDeclSelector(Scope *S, 6214 bool IsInstanceMethod, 6215 bool AtParameterName, 6216 ParsedType ReturnType, 6217 IdentifierInfo **SelIdents, 6218 unsigned NumSelIdents); 6219 void CodeCompletePreprocessorDirective(bool InConditional); 6220 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 6221 void CodeCompletePreprocessorMacroName(bool IsDefinition); 6222 void CodeCompletePreprocessorExpression(); 6223 void CodeCompletePreprocessorMacroArgument(Scope *S, 6224 IdentifierInfo *Macro, 6225 MacroInfo *MacroInfo, 6226 unsigned Argument); 6227 void CodeCompleteNaturalLanguage(); 6228 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 6229 SmallVectorImpl<CodeCompletionResult> &Results); 6230 //@} 6231 6232 //===--------------------------------------------------------------------===// 6233 // Extra semantic analysis beyond the C type system 6234 6235public: 6236 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 6237 unsigned ByteNo) const; 6238 6239private: 6240 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr, 6241 const ArraySubscriptExpr *ASE=0, 6242 bool AllowOnePastEnd=true, bool IndexNegated=false); 6243 void CheckArrayAccess(const Expr *E); 6244 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 6245 bool CheckObjCMethodCall(ObjCMethodDecl *Method, SourceLocation loc, 6246 Expr **Args, unsigned NumArgs); 6247 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 6248 6249 bool CheckablePrintfAttr(const FormatAttr *Format, Expr **Args, 6250 unsigned NumArgs, bool IsCXXMemberCall); 6251 bool CheckObjCString(Expr *Arg); 6252 6253 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6254 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6255 6256 bool SemaBuiltinVAStart(CallExpr *TheCall); 6257 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 6258 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 6259 6260public: 6261 // Used by C++ template instantiation. 6262 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 6263 6264private: 6265 bool SemaBuiltinPrefetch(CallExpr *TheCall); 6266 bool SemaBuiltinObjectSize(CallExpr *TheCall); 6267 bool SemaBuiltinLongjmp(CallExpr *TheCall); 6268 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 6269 ExprResult SemaAtomicOpsOverloaded(ExprResult TheCallResult, 6270 AtomicExpr::AtomicOp Op); 6271 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 6272 llvm::APSInt &Result); 6273 6274 bool SemaCheckStringLiteral(const Expr *E, Expr **Args, unsigned NumArgs, 6275 bool HasVAListArg, unsigned format_idx, 6276 unsigned firstDataArg, bool isPrintf, 6277 bool inFunctionCall = true); 6278 6279 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 6280 Expr **Args, unsigned NumArgs, bool HasVAListArg, 6281 unsigned format_idx, unsigned firstDataArg, 6282 bool isPrintf, bool inFunctionCall); 6283 6284 void CheckNonNullArguments(const NonNullAttr *NonNull, 6285 const Expr * const *ExprArgs, 6286 SourceLocation CallSiteLoc); 6287 6288 void CheckFormatArguments(const FormatAttr *Format, CallExpr *TheCall); 6289 void CheckFormatArguments(const FormatAttr *Format, Expr **Args, 6290 unsigned NumArgs, bool IsCXXMember, 6291 SourceLocation Loc, SourceRange Range); 6292 void CheckPrintfScanfArguments(Expr **Args, unsigned NumArgs, 6293 bool HasVAListArg, unsigned format_idx, 6294 unsigned firstDataArg, bool isPrintf, 6295 SourceLocation Loc, SourceRange range); 6296 6297 void CheckMemaccessArguments(const CallExpr *Call, 6298 unsigned BId, 6299 IdentifierInfo *FnName); 6300 6301 void CheckStrlcpycatArguments(const CallExpr *Call, 6302 IdentifierInfo *FnName); 6303 6304 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 6305 SourceLocation ReturnLoc); 6306 void CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr* RHS); 6307 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 6308 6309 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 6310 Expr *Init); 6311 6312 /// \brief The parser's current scope. 6313 /// 6314 /// The parser maintains this state here. 6315 Scope *CurScope; 6316 6317protected: 6318 friend class Parser; 6319 friend class InitializationSequence; 6320 friend class ASTReader; 6321 friend class ASTWriter; 6322 6323public: 6324 /// \brief Retrieve the parser's current scope. 6325 /// 6326 /// This routine must only be used when it is certain that semantic analysis 6327 /// and the parser are in precisely the same context, which is not the case 6328 /// when, e.g., we are performing any kind of template instantiation. 6329 /// Therefore, the only safe places to use this scope are in the parser 6330 /// itself and in routines directly invoked from the parser and *never* from 6331 /// template substitution or instantiation. 6332 Scope *getCurScope() const { return CurScope; } 6333 6334 Decl *getObjCDeclContext() const; 6335 6336 DeclContext *getCurLexicalContext() const { 6337 return OriginalLexicalContext ? OriginalLexicalContext : CurContext; 6338 } 6339 6340 AvailabilityResult getCurContextAvailability() const; 6341}; 6342 6343/// \brief RAII object that enters a new expression evaluation context. 6344class EnterExpressionEvaluationContext { 6345 Sema &Actions; 6346 6347public: 6348 EnterExpressionEvaluationContext(Sema &Actions, 6349 Sema::ExpressionEvaluationContext NewContext) 6350 : Actions(Actions) { 6351 Actions.PushExpressionEvaluationContext(NewContext); 6352 } 6353 6354 ~EnterExpressionEvaluationContext() { 6355 Actions.PopExpressionEvaluationContext(); 6356 } 6357}; 6358 6359} // end namespace clang 6360 6361#endif 6362