Sema.h revision 16e46dd0c284296cea819dfbf67942ecef02894d
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 class SmallBitVector; 49} 50 51namespace clang { 52 class ADLResult; 53 class ASTConsumer; 54 class ASTContext; 55 class ASTMutationListener; 56 class ASTReader; 57 class ASTWriter; 58 class ArrayType; 59 class AttributeList; 60 class BlockDecl; 61 class CXXBasePath; 62 class CXXBasePaths; 63 typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 64 class CXXConstructorDecl; 65 class CXXConversionDecl; 66 class CXXDestructorDecl; 67 class CXXFieldCollector; 68 class CXXMemberCallExpr; 69 class CXXMethodDecl; 70 class CXXScopeSpec; 71 class CXXTemporary; 72 class CXXTryStmt; 73 class CallExpr; 74 class ClassTemplateDecl; 75 class ClassTemplatePartialSpecializationDecl; 76 class ClassTemplateSpecializationDecl; 77 class CodeCompleteConsumer; 78 class CodeCompletionAllocator; 79 class CodeCompletionResult; 80 class Decl; 81 class DeclAccessPair; 82 class DeclContext; 83 class DeclRefExpr; 84 class DeclaratorDecl; 85 class DeducedTemplateArgument; 86 class DependentDiagnostic; 87 class DesignatedInitExpr; 88 class Designation; 89 class EnumConstantDecl; 90 class Expr; 91 class ExtVectorType; 92 class ExternalSemaSource; 93 class FormatAttr; 94 class FriendDecl; 95 class FunctionDecl; 96 class FunctionProtoType; 97 class FunctionTemplateDecl; 98 class ImplicitConversionSequence; 99 class InitListExpr; 100 class InitializationKind; 101 class InitializationSequence; 102 class InitializedEntity; 103 class IntegerLiteral; 104 class LabelStmt; 105 class LangOptions; 106 class LocalInstantiationScope; 107 class LookupResult; 108 class MacroInfo; 109 class MultiLevelTemplateArgumentList; 110 class NamedDecl; 111 class NonNullAttr; 112 class ObjCCategoryDecl; 113 class ObjCCategoryImplDecl; 114 class ObjCCompatibleAliasDecl; 115 class ObjCContainerDecl; 116 class ObjCImplDecl; 117 class ObjCImplementationDecl; 118 class ObjCInterfaceDecl; 119 class ObjCIvarDecl; 120 template <class T> class ObjCList; 121 class ObjCMessageExpr; 122 class ObjCMethodDecl; 123 class ObjCPropertyDecl; 124 class ObjCProtocolDecl; 125 class OverloadCandidateSet; 126 class OverloadExpr; 127 class ParenListExpr; 128 class ParmVarDecl; 129 class Preprocessor; 130 class PseudoDestructorTypeStorage; 131 class PseudoObjectExpr; 132 class QualType; 133 class StandardConversionSequence; 134 class Stmt; 135 class StringLiteral; 136 class SwitchStmt; 137 class TargetAttributesSema; 138 class TemplateArgument; 139 class TemplateArgumentList; 140 class TemplateArgumentLoc; 141 class TemplateDecl; 142 class TemplateParameterList; 143 class TemplatePartialOrderingContext; 144 class TemplateTemplateParmDecl; 145 class Token; 146 class TypeAliasDecl; 147 class TypedefDecl; 148 class TypedefNameDecl; 149 class TypeLoc; 150 class UnqualifiedId; 151 class UnresolvedLookupExpr; 152 class UnresolvedMemberExpr; 153 class UnresolvedSetImpl; 154 class UnresolvedSetIterator; 155 class UsingDecl; 156 class UsingShadowDecl; 157 class ValueDecl; 158 class VarDecl; 159 class VisibilityAttr; 160 class VisibleDeclConsumer; 161 class IndirectFieldDecl; 162 163namespace sema { 164 class AccessedEntity; 165 class BlockScopeInfo; 166 class DelayedDiagnostic; 167 class FunctionScopeInfo; 168 class LambdaScopeInfo; 169 class PossiblyUnreachableDiag; 170 class TemplateDeductionInfo; 171} 172 173// FIXME: No way to easily map from TemplateTypeParmTypes to 174// TemplateTypeParmDecls, so we have this horrible PointerUnion. 175typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 176 SourceLocation> UnexpandedParameterPack; 177 178/// Sema - This implements semantic analysis and AST building for C. 179class Sema { 180 Sema(const Sema&); // DO NOT IMPLEMENT 181 void operator=(const Sema&); // DO NOT IMPLEMENT 182 mutable const TargetAttributesSema* TheTargetAttributesSema; 183public: 184 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 185 typedef OpaquePtr<TemplateName> TemplateTy; 186 typedef OpaquePtr<QualType> TypeTy; 187 188 OpenCLOptions OpenCLFeatures; 189 FPOptions FPFeatures; 190 191 const LangOptions &LangOpts; 192 Preprocessor &PP; 193 ASTContext &Context; 194 ASTConsumer &Consumer; 195 DiagnosticsEngine &Diags; 196 SourceManager &SourceMgr; 197 198 /// \brief Flag indicating whether or not to collect detailed statistics. 199 bool CollectStats; 200 201 /// \brief Source of additional semantic information. 202 ExternalSemaSource *ExternalSource; 203 204 /// \brief Code-completion consumer. 205 CodeCompleteConsumer *CodeCompleter; 206 207 /// CurContext - This is the current declaration context of parsing. 208 DeclContext *CurContext; 209 210 /// \brief Generally null except when we temporarily switch decl contexts, 211 /// like in \see ActOnObjCTemporaryExitContainerContext. 212 DeclContext *OriginalLexicalContext; 213 214 /// VAListTagName - The declaration name corresponding to __va_list_tag. 215 /// This is used as part of a hack to omit that class from ADL results. 216 DeclarationName VAListTagName; 217 218 /// PackContext - Manages the stack for #pragma pack. An alignment 219 /// of 0 indicates default alignment. 220 void *PackContext; // Really a "PragmaPackStack*" 221 222 bool MSStructPragmaOn; // True when #pragma ms_struct on 223 224 /// VisContext - Manages the stack for #pragma GCC visibility. 225 void *VisContext; // Really a "PragmaVisStack*" 226 227 /// ExprNeedsCleanups - True if the current evaluation context 228 /// requires cleanups to be run at its conclusion. 229 bool ExprNeedsCleanups; 230 231 /// ExprCleanupObjects - This is the stack of objects requiring 232 /// cleanup that are created by the current full expression. The 233 /// element type here is ExprWithCleanups::Object. 234 SmallVector<BlockDecl*, 8> ExprCleanupObjects; 235 236 /// \brief Stack containing information about each of the nested 237 /// function, block, and method scopes that are currently active. 238 /// 239 /// This array is never empty. Clients should ignore the first 240 /// element, which is used to cache a single FunctionScopeInfo 241 /// that's used to parse every top-level function. 242 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 243 244 typedef LazyVector<TypedefNameDecl *, ExternalSemaSource, 245 &ExternalSemaSource::ReadExtVectorDecls, 2, 2> 246 ExtVectorDeclsType; 247 248 /// ExtVectorDecls - This is a list all the extended vector types. This allows 249 /// us to associate a raw vector type with one of the ext_vector type names. 250 /// This is only necessary for issuing pretty diagnostics. 251 ExtVectorDeclsType ExtVectorDecls; 252 253 /// \brief The set of types for which we have already complained about the 254 /// definitions being hidden. 255 /// 256 /// This set is used to suppress redundant diagnostics. 257 llvm::SmallPtrSet<NamedDecl *, 4> HiddenDefinitions; 258 259 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 260 llvm::OwningPtr<CXXFieldCollector> FieldCollector; 261 262 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 263 264 /// PureVirtualClassDiagSet - a set of class declarations which we have 265 /// emitted a list of pure virtual functions. Used to prevent emitting the 266 /// same list more than once. 267 llvm::OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 268 269 /// ParsingInitForAutoVars - a set of declarations with auto types for which 270 /// we are currently parsing the initializer. 271 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 272 273 /// \brief A mapping from external names to the most recent 274 /// locally-scoped external declaration with that name. 275 /// 276 /// This map contains external declarations introduced in local 277 /// scoped, e.g., 278 /// 279 /// \code 280 /// void f() { 281 /// void foo(int, int); 282 /// } 283 /// \endcode 284 /// 285 /// Here, the name "foo" will be associated with the declaration on 286 /// "foo" within f. This name is not visible outside of 287 /// "f". However, we still find it in two cases: 288 /// 289 /// - If we are declaring another external with the name "foo", we 290 /// can find "foo" as a previous declaration, so that the types 291 /// of this external declaration can be checked for 292 /// compatibility. 293 /// 294 /// - If we would implicitly declare "foo" (e.g., due to a call to 295 /// "foo" in C when no prototype or definition is visible), then 296 /// we find this declaration of "foo" and complain that it is 297 /// not visible. 298 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 299 300 /// \brief Look for a locally scoped external declaration by the given name. 301 llvm::DenseMap<DeclarationName, NamedDecl *>::iterator 302 findLocallyScopedExternalDecl(DeclarationName Name); 303 304 typedef LazyVector<VarDecl *, ExternalSemaSource, 305 &ExternalSemaSource::ReadTentativeDefinitions, 2, 2> 306 TentativeDefinitionsType; 307 308 /// \brief All the tentative definitions encountered in the TU. 309 TentativeDefinitionsType TentativeDefinitions; 310 311 typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource, 312 &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2> 313 UnusedFileScopedDeclsType; 314 315 /// \brief The set of file scoped decls seen so far that have not been used 316 /// and must warn if not used. Only contains the first declaration. 317 UnusedFileScopedDeclsType UnusedFileScopedDecls; 318 319 typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource, 320 &ExternalSemaSource::ReadDelegatingConstructors, 2, 2> 321 DelegatingCtorDeclsType; 322 323 /// \brief All the delegating constructors seen so far in the file, used for 324 /// cycle detection at the end of the TU. 325 DelegatingCtorDeclsType DelegatingCtorDecls; 326 327 /// \brief All the overriding destructors seen during a class definition 328 /// (there could be multiple due to nested classes) that had their exception 329 /// spec checks delayed, plus the overridden destructor. 330 SmallVector<std::pair<const CXXDestructorDecl*, 331 const CXXDestructorDecl*>, 2> 332 DelayedDestructorExceptionSpecChecks; 333 334 /// \brief Callback to the parser to parse templated functions when needed. 335 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 336 LateTemplateParserCB *LateTemplateParser; 337 void *OpaqueParser; 338 339 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 340 LateTemplateParser = LTP; 341 OpaqueParser = P; 342 } 343 344 class DelayedDiagnostics; 345 346 class ParsingDeclState { 347 unsigned SavedStackSize; 348 friend class Sema::DelayedDiagnostics; 349 }; 350 351 class ProcessingContextState { 352 unsigned SavedParsingDepth; 353 unsigned SavedActiveStackBase; 354 friend class Sema::DelayedDiagnostics; 355 }; 356 357 /// A class which encapsulates the logic for delaying diagnostics 358 /// during parsing and other processing. 359 class DelayedDiagnostics { 360 /// \brief The stack of diagnostics that were delayed due to being 361 /// produced during the parsing of a declaration. 362 sema::DelayedDiagnostic *Stack; 363 364 /// \brief The number of objects on the delayed-diagnostics stack. 365 unsigned StackSize; 366 367 /// \brief The current capacity of the delayed-diagnostics stack. 368 unsigned StackCapacity; 369 370 /// \brief The index of the first "active" delayed diagnostic in 371 /// the stack. When parsing class definitions, we ignore active 372 /// delayed diagnostics from the surrounding context. 373 unsigned ActiveStackBase; 374 375 /// \brief The depth of the declarations we're currently parsing. 376 /// This gets saved and reset whenever we enter a class definition. 377 unsigned ParsingDepth; 378 379 public: 380 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 381 ActiveStackBase(0), ParsingDepth(0) {} 382 383 ~DelayedDiagnostics() { 384 delete[] reinterpret_cast<char*>(Stack); 385 } 386 387 /// Adds a delayed diagnostic. 388 void add(const sema::DelayedDiagnostic &diag); 389 390 /// Determines whether diagnostics should be delayed. 391 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 392 393 /// Observe that we've started parsing a declaration. Access and 394 /// deprecation diagnostics will be delayed; when the declaration 395 /// is completed, all active delayed diagnostics will be evaluated 396 /// in its context, and then active diagnostics stack will be 397 /// popped down to the saved depth. 398 ParsingDeclState pushParsingDecl() { 399 ParsingDepth++; 400 401 ParsingDeclState state; 402 state.SavedStackSize = StackSize; 403 return state; 404 } 405 406 /// Observe that we're completed parsing a declaration. 407 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 408 409 /// Observe that we've started processing a different context, the 410 /// contents of which are semantically separate from the 411 /// declarations it may lexically appear in. This sets aside the 412 /// current stack of active diagnostics and starts afresh. 413 ProcessingContextState pushContext() { 414 assert(StackSize >= ActiveStackBase); 415 416 ProcessingContextState state; 417 state.SavedParsingDepth = ParsingDepth; 418 state.SavedActiveStackBase = ActiveStackBase; 419 420 ActiveStackBase = StackSize; 421 ParsingDepth = 0; 422 423 return state; 424 } 425 426 /// Observe that we've stopped processing a context. This 427 /// restores the previous stack of active diagnostics. 428 void popContext(ProcessingContextState state) { 429 assert(ActiveStackBase == StackSize); 430 assert(ParsingDepth == 0); 431 ActiveStackBase = state.SavedActiveStackBase; 432 ParsingDepth = state.SavedParsingDepth; 433 } 434 } DelayedDiagnostics; 435 436 /// A RAII object to temporarily push a declaration context. 437 class ContextRAII { 438 private: 439 Sema &S; 440 DeclContext *SavedContext; 441 ProcessingContextState SavedContextState; 442 443 public: 444 ContextRAII(Sema &S, DeclContext *ContextToPush) 445 : S(S), SavedContext(S.CurContext), 446 SavedContextState(S.DelayedDiagnostics.pushContext()) 447 { 448 assert(ContextToPush && "pushing null context"); 449 S.CurContext = ContextToPush; 450 } 451 452 void pop() { 453 if (!SavedContext) return; 454 S.CurContext = SavedContext; 455 S.DelayedDiagnostics.popContext(SavedContextState); 456 SavedContext = 0; 457 } 458 459 ~ContextRAII() { 460 pop(); 461 } 462 }; 463 464 /// WeakUndeclaredIdentifiers - Identifiers contained in 465 /// #pragma weak before declared. rare. may alias another 466 /// identifier, declared or undeclared 467 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 468 469 /// \brief Load weak undeclared identifiers from the external source. 470 void LoadExternalWeakUndeclaredIdentifiers(); 471 472 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 473 /// #pragma weak during processing of other Decls. 474 /// I couldn't figure out a clean way to generate these in-line, so 475 /// we store them here and handle separately -- which is a hack. 476 /// It would be best to refactor this. 477 SmallVector<Decl*,2> WeakTopLevelDecl; 478 479 IdentifierResolver IdResolver; 480 481 /// Translation Unit Scope - useful to Objective-C actions that need 482 /// to lookup file scope declarations in the "ordinary" C decl namespace. 483 /// For example, user-defined classes, built-in "id" type, etc. 484 Scope *TUScope; 485 486 /// \brief The C++ "std" namespace, where the standard library resides. 487 LazyDeclPtr StdNamespace; 488 489 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 490 /// standard library. 491 LazyDeclPtr StdBadAlloc; 492 493 /// \brief The C++ "std::initializer_list" template, which is defined in 494 /// <initializer_list>. 495 ClassTemplateDecl *StdInitializerList; 496 497 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 498 RecordDecl *CXXTypeInfoDecl; 499 500 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 501 RecordDecl *MSVCGuidDecl; 502 503 /// A flag to remember whether the implicit forms of operator new and delete 504 /// have been declared. 505 bool GlobalNewDeleteDeclared; 506 507 508 /// A flag that is set when parsing a -dealloc method and no [super dealloc] 509 /// call was found yet. 510 bool ObjCShouldCallSuperDealloc; 511 /// A flag that is set when parsing a -finalize method and no [super finalize] 512 /// call was found yet. 513 bool ObjCShouldCallSuperFinalize; 514 515 /// \brief Describes how the expressions currently being parsed are 516 /// evaluated at run-time, if at all. 517 enum ExpressionEvaluationContext { 518 /// \brief The current expression and its subexpressions occur within an 519 /// unevaluated operand (C++11 [expr]p7), such as the subexpression of 520 /// \c sizeof, where the type of the expression may be significant but 521 /// no code will be generated to evaluate the value of the expression at 522 /// run time. 523 Unevaluated, 524 525 /// \brief The current context is "potentially evaluated" in C++11 terms, 526 /// but the expression is evaluated at compile-time (like the values of 527 /// cases in a switch statment). 528 ConstantEvaluated, 529 530 /// \brief The current expression is potentially evaluated at run time, 531 /// which means that code may be generated to evaluate the value of the 532 /// expression at run time. 533 PotentiallyEvaluated, 534 535 /// \brief The current expression is potentially evaluated, but any 536 /// declarations referenced inside that expression are only used if 537 /// in fact the current expression is used. 538 /// 539 /// This value is used when parsing default function arguments, for which 540 /// we would like to provide diagnostics (e.g., passing non-POD arguments 541 /// through varargs) but do not want to mark declarations as "referenced" 542 /// until the default argument is used. 543 PotentiallyEvaluatedIfUsed 544 }; 545 546 /// \brief Data structure used to record current or nested 547 /// expression evaluation contexts. 548 struct ExpressionEvaluationContextRecord { 549 /// \brief The expression evaluation context. 550 ExpressionEvaluationContext Context; 551 552 /// \brief Whether the enclosing context needed a cleanup. 553 bool ParentNeedsCleanups; 554 555 /// \brief The number of active cleanup objects when we entered 556 /// this expression evaluation context. 557 unsigned NumCleanupObjects; 558 559 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 560 unsigned NumCleanupObjects, 561 bool ParentNeedsCleanups) 562 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups), 563 NumCleanupObjects(NumCleanupObjects) { } 564 }; 565 566 /// A stack of expression evaluation contexts. 567 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 568 569 /// SpecialMemberOverloadResult - The overloading result for a special member 570 /// function. 571 /// 572 /// This is basically a wrapper around PointerIntPair. The lowest bit of the 573 /// integer is used to determine whether we have a parameter qualification 574 /// match, the second-lowest is whether we had success in resolving the 575 /// overload to a unique non-deleted function. 576 /// 577 /// The ConstParamMatch bit represents whether, when looking up a copy 578 /// constructor or assignment operator, we found a potential copy 579 /// constructor/assignment operator whose first parameter is const-qualified. 580 /// This is used for determining parameter types of other objects and is 581 /// utterly meaningless on other types of special members. 582 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 583 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 584 public: 585 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 586 : FastFoldingSetNode(ID) 587 {} 588 589 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 590 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 591 592 bool hasSuccess() const { return Pair.getInt() & 0x1; } 593 void setSuccess(bool B) { 594 Pair.setInt(unsigned(B) | hasConstParamMatch() << 1); 595 } 596 597 bool hasConstParamMatch() const { return Pair.getInt() & 0x2; } 598 void setConstParamMatch(bool B) { 599 Pair.setInt(B << 1 | unsigned(hasSuccess())); 600 } 601 }; 602 603 /// \brief A cache of special member function overload resolution results 604 /// for C++ records. 605 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 606 607 /// \brief The kind of translation unit we are processing. 608 /// 609 /// When we're processing a complete translation unit, Sema will perform 610 /// end-of-translation-unit semantic tasks (such as creating 611 /// initializers for tentative definitions in C) once parsing has 612 /// completed. Modules and precompiled headers perform different kinds of 613 /// checks. 614 TranslationUnitKind TUKind; 615 616 llvm::BumpPtrAllocator BumpAlloc; 617 618 /// \brief The number of SFINAE diagnostics that have been trapped. 619 unsigned NumSFINAEErrors; 620 621 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> > 622 UnparsedDefaultArgInstantiationsMap; 623 624 /// \brief A mapping from parameters with unparsed default arguments to the 625 /// set of instantiations of each parameter. 626 /// 627 /// This mapping is a temporary data structure used when parsing 628 /// nested class templates or nested classes of class templates, 629 /// where we might end up instantiating an inner class before the 630 /// default arguments of its methods have been parsed. 631 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 632 633 // Contains the locations of the beginning of unparsed default 634 // argument locations. 635 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 636 637 /// UndefinedInternals - all the used, undefined objects with 638 /// internal linkage in this translation unit. 639 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 640 641 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 642 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 643 644 /// Method Pool - allows efficient lookup when typechecking messages to "id". 645 /// We need to maintain a list, since selectors can have differing signatures 646 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 647 /// of selectors are "overloaded"). 648 GlobalMethodPool MethodPool; 649 650 /// Method selectors used in a @selector expression. Used for implementation 651 /// of -Wselector. 652 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 653 654 void ReadMethodPool(Selector Sel); 655 656 /// Private Helper predicate to check for 'self'. 657 bool isSelfExpr(Expr *RExpr); 658public: 659 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 660 TranslationUnitKind TUKind = TU_Complete, 661 CodeCompleteConsumer *CompletionConsumer = 0); 662 ~Sema(); 663 664 /// \brief Perform initialization that occurs after the parser has been 665 /// initialized but before it parses anything. 666 void Initialize(); 667 668 const LangOptions &getLangOptions() const { return LangOpts; } 669 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 670 FPOptions &getFPOptions() { return FPFeatures; } 671 672 DiagnosticsEngine &getDiagnostics() const { return Diags; } 673 SourceManager &getSourceManager() const { return SourceMgr; } 674 const TargetAttributesSema &getTargetAttributesSema() const; 675 Preprocessor &getPreprocessor() const { return PP; } 676 ASTContext &getASTContext() const { return Context; } 677 ASTConsumer &getASTConsumer() const { return Consumer; } 678 ASTMutationListener *getASTMutationListener() const; 679 680 void PrintStats() const; 681 682 /// \brief Helper class that creates diagnostics with optional 683 /// template instantiation stacks. 684 /// 685 /// This class provides a wrapper around the basic DiagnosticBuilder 686 /// class that emits diagnostics. SemaDiagnosticBuilder is 687 /// responsible for emitting the diagnostic (as DiagnosticBuilder 688 /// does) and, if the diagnostic comes from inside a template 689 /// instantiation, printing the template instantiation stack as 690 /// well. 691 class SemaDiagnosticBuilder : public DiagnosticBuilder { 692 Sema &SemaRef; 693 unsigned DiagID; 694 695 public: 696 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 697 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 698 699 explicit SemaDiagnosticBuilder(Sema &SemaRef) 700 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 701 702 ~SemaDiagnosticBuilder(); 703 }; 704 705 /// \brief Emit a diagnostic. 706 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 707 708 /// \brief Emit a partial diagnostic. 709 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 710 711 /// \brief Build a partial diagnostic. 712 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 713 714 bool findMacroSpelling(SourceLocation &loc, StringRef name); 715 716 /// \brief Get a string to suggest for zero-initialization of a type. 717 const char *getFixItZeroInitializerForType(QualType T) const; 718 719 ExprResult Owned(Expr* E) { return E; } 720 ExprResult Owned(ExprResult R) { return R; } 721 StmtResult Owned(Stmt* S) { return S; } 722 723 void ActOnEndOfTranslationUnit(); 724 725 void CheckDelegatingCtorCycles(); 726 727 Scope *getScopeForContext(DeclContext *Ctx); 728 729 void PushFunctionScope(); 730 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 731 void PushLambdaScope(CXXRecordDecl *Lambda); 732 void PopFunctionScopeInfo(const sema::AnalysisBasedWarnings::Policy *WP =0, 733 const Decl *D = 0, const BlockExpr *blkExpr = 0); 734 735 sema::FunctionScopeInfo *getCurFunction() const { 736 return FunctionScopes.back(); 737 } 738 739 bool hasAnyUnrecoverableErrorsInThisFunction() const; 740 741 /// \brief Retrieve the current block, if any. 742 sema::BlockScopeInfo *getCurBlock(); 743 744 /// \brief Retrieve the current lambda expression, if any. 745 sema::LambdaScopeInfo *getCurLambda(); 746 747 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 748 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 749 750 //===--------------------------------------------------------------------===// 751 // Type Analysis / Processing: SemaType.cpp. 752 // 753 754 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 755 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 756 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 757 } 758 QualType BuildPointerType(QualType T, 759 SourceLocation Loc, DeclarationName Entity); 760 QualType BuildReferenceType(QualType T, bool LValueRef, 761 SourceLocation Loc, DeclarationName Entity); 762 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 763 Expr *ArraySize, unsigned Quals, 764 SourceRange Brackets, DeclarationName Entity); 765 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 766 SourceLocation AttrLoc); 767 QualType BuildFunctionType(QualType T, 768 QualType *ParamTypes, unsigned NumParamTypes, 769 bool Variadic, unsigned Quals, 770 RefQualifierKind RefQualifier, 771 SourceLocation Loc, DeclarationName Entity, 772 FunctionType::ExtInfo Info); 773 QualType BuildMemberPointerType(QualType T, QualType Class, 774 SourceLocation Loc, 775 DeclarationName Entity); 776 QualType BuildBlockPointerType(QualType T, 777 SourceLocation Loc, DeclarationName Entity); 778 QualType BuildParenType(QualType T); 779 QualType BuildAtomicType(QualType T, SourceLocation Loc); 780 781 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); 782 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); 783 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 784 TypeSourceInfo *ReturnTypeInfo); 785 /// \brief Package the given type and TSI into a ParsedType. 786 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 787 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 788 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 789 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 790 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 791 bool CheckDistantExceptionSpec(QualType T); 792 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 793 bool CheckEquivalentExceptionSpec( 794 const FunctionProtoType *Old, SourceLocation OldLoc, 795 const FunctionProtoType *New, SourceLocation NewLoc); 796 bool CheckEquivalentExceptionSpec( 797 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 798 const FunctionProtoType *Old, SourceLocation OldLoc, 799 const FunctionProtoType *New, SourceLocation NewLoc, 800 bool *MissingExceptionSpecification = 0, 801 bool *MissingEmptyExceptionSpecification = 0, 802 bool AllowNoexceptAllMatchWithNoSpec = false, 803 bool IsOperatorNew = false); 804 bool CheckExceptionSpecSubset( 805 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 806 const FunctionProtoType *Superset, SourceLocation SuperLoc, 807 const FunctionProtoType *Subset, SourceLocation SubLoc); 808 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 809 const FunctionProtoType *Target, SourceLocation TargetLoc, 810 const FunctionProtoType *Source, SourceLocation SourceLoc); 811 812 TypeResult ActOnTypeName(Scope *S, Declarator &D); 813 814 /// \brief The parser has parsed the context-sensitive type 'instancetype' 815 /// in an Objective-C message declaration. Return the appropriate type. 816 ParsedType ActOnObjCInstanceType(SourceLocation Loc); 817 818 bool RequireCompleteType(SourceLocation Loc, QualType T, 819 const PartialDiagnostic &PD, 820 std::pair<SourceLocation, PartialDiagnostic> Note); 821 bool RequireCompleteType(SourceLocation Loc, QualType T, 822 const PartialDiagnostic &PD); 823 bool RequireCompleteType(SourceLocation Loc, QualType T, 824 unsigned DiagID); 825 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 826 std::pair<SourceLocation, 827 PartialDiagnostic> Note); 828 829 bool RequireLiteralType(SourceLocation Loc, QualType T, 830 const PartialDiagnostic &PD, 831 bool AllowIncompleteType = false); 832 833 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 834 const CXXScopeSpec &SS, QualType T); 835 836 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 837 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 838 QualType BuildUnaryTransformType(QualType BaseType, 839 UnaryTransformType::UTTKind UKind, 840 SourceLocation Loc); 841 842 //===--------------------------------------------------------------------===// 843 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 844 // 845 846 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 847 848 void DiagnoseUseOfUnimplementedSelectors(); 849 850 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 851 Scope *S, CXXScopeSpec *SS = 0, 852 bool isClassName = false, 853 bool HasTrailingDot = false, 854 ParsedType ObjectType = ParsedType(), 855 bool IsCtorOrDtorName = false, 856 bool WantNontrivialTypeSourceInfo = false, 857 IdentifierInfo **CorrectedII = 0); 858 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 859 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS, Scope *S); 860 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 861 SourceLocation IILoc, 862 Scope *S, 863 CXXScopeSpec *SS, 864 ParsedType &SuggestedType); 865 866 /// \brief Describes the result of the name lookup and resolution performed 867 /// by \c ClassifyName(). 868 enum NameClassificationKind { 869 NC_Unknown, 870 NC_Error, 871 NC_Keyword, 872 NC_Type, 873 NC_Expression, 874 NC_NestedNameSpecifier, 875 NC_TypeTemplate, 876 NC_FunctionTemplate 877 }; 878 879 class NameClassification { 880 NameClassificationKind Kind; 881 ExprResult Expr; 882 TemplateName Template; 883 ParsedType Type; 884 const IdentifierInfo *Keyword; 885 886 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 887 888 public: 889 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 890 891 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 892 893 NameClassification(const IdentifierInfo *Keyword) 894 : Kind(NC_Keyword), Keyword(Keyword) { } 895 896 static NameClassification Error() { 897 return NameClassification(NC_Error); 898 } 899 900 static NameClassification Unknown() { 901 return NameClassification(NC_Unknown); 902 } 903 904 static NameClassification NestedNameSpecifier() { 905 return NameClassification(NC_NestedNameSpecifier); 906 } 907 908 static NameClassification TypeTemplate(TemplateName Name) { 909 NameClassification Result(NC_TypeTemplate); 910 Result.Template = Name; 911 return Result; 912 } 913 914 static NameClassification FunctionTemplate(TemplateName Name) { 915 NameClassification Result(NC_FunctionTemplate); 916 Result.Template = Name; 917 return Result; 918 } 919 920 NameClassificationKind getKind() const { return Kind; } 921 922 ParsedType getType() const { 923 assert(Kind == NC_Type); 924 return Type; 925 } 926 927 ExprResult getExpression() const { 928 assert(Kind == NC_Expression); 929 return Expr; 930 } 931 932 TemplateName getTemplateName() const { 933 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 934 return Template; 935 } 936 937 TemplateNameKind getTemplateNameKind() const { 938 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 939 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 940 } 941}; 942 943 /// \brief Perform name lookup on the given name, classifying it based on 944 /// the results of name lookup and the following token. 945 /// 946 /// This routine is used by the parser to resolve identifiers and help direct 947 /// parsing. When the identifier cannot be found, this routine will attempt 948 /// to correct the typo and classify based on the resulting name. 949 /// 950 /// \param S The scope in which we're performing name lookup. 951 /// 952 /// \param SS The nested-name-specifier that precedes the name. 953 /// 954 /// \param Name The identifier. If typo correction finds an alternative name, 955 /// this pointer parameter will be updated accordingly. 956 /// 957 /// \param NameLoc The location of the identifier. 958 /// 959 /// \param NextToken The token following the identifier. Used to help 960 /// disambiguate the name. 961 NameClassification ClassifyName(Scope *S, 962 CXXScopeSpec &SS, 963 IdentifierInfo *&Name, 964 SourceLocation NameLoc, 965 const Token &NextToken); 966 967 Decl *ActOnDeclarator(Scope *S, Declarator &D); 968 969 Decl *HandleDeclarator(Scope *S, Declarator &D, 970 MultiTemplateParamsArg TemplateParameterLists); 971 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 972 const LookupResult &Previous, 973 Scope *S); 974 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 975 void DiagnoseFunctionSpecifiers(Declarator& D); 976 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 977 void CheckShadow(Scope *S, VarDecl *D); 978 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 979 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 980 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 981 TypeSourceInfo *TInfo, 982 LookupResult &Previous); 983 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 984 LookupResult &Previous, bool &Redeclaration); 985 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 986 TypeSourceInfo *TInfo, 987 LookupResult &Previous, 988 MultiTemplateParamsArg TemplateParamLists); 989 // Returns true if the variable declaration is a redeclaration 990 bool CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous); 991 void CheckCompleteVariableDeclaration(VarDecl *var); 992 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 993 TypeSourceInfo *TInfo, 994 LookupResult &Previous, 995 MultiTemplateParamsArg TemplateParamLists, 996 bool &AddToScope); 997 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 998 999 /// \brief The kind of constexpr declaration checking we are performing. 1000 /// 1001 /// The kind affects which diagnostics (if any) are emitted if the function 1002 /// does not satisfy the requirements of a constexpr function declaration. 1003 enum CheckConstexprKind { 1004 /// \brief Check a constexpr function declaration, and produce errors if it 1005 /// does not satisfy the requirements. 1006 CCK_Declaration, 1007 /// \brief Check a constexpr function template instantiation. 1008 CCK_Instantiation, 1009 /// \brief Produce notes explaining why an instantiation was not constexpr. 1010 CCK_NoteNonConstexprInstantiation 1011 }; 1012 bool CheckConstexprFunctionDecl(const FunctionDecl *FD, 1013 CheckConstexprKind CCK); 1014 bool CheckConstexprFunctionBody(const FunctionDecl *FD, Stmt *Body); 1015 1016 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1017 // Returns true if the function declaration is a redeclaration 1018 bool CheckFunctionDeclaration(Scope *S, 1019 FunctionDecl *NewFD, LookupResult &Previous, 1020 bool IsExplicitSpecialization); 1021 void CheckMain(FunctionDecl *FD, const DeclSpec &D); 1022 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1023 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1024 SourceLocation Loc, 1025 QualType T); 1026 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1027 SourceLocation NameLoc, IdentifierInfo *Name, 1028 QualType T, TypeSourceInfo *TSInfo, 1029 StorageClass SC, StorageClass SCAsWritten); 1030 void ActOnParamDefaultArgument(Decl *param, 1031 SourceLocation EqualLoc, 1032 Expr *defarg); 1033 void ActOnParamUnparsedDefaultArgument(Decl *param, 1034 SourceLocation EqualLoc, 1035 SourceLocation ArgLoc); 1036 void ActOnParamDefaultArgumentError(Decl *param); 1037 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1038 SourceLocation EqualLoc); 1039 1040 void CheckSelfReference(Decl *OrigDecl, Expr *E); 1041 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1042 bool TypeMayContainAuto); 1043 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1044 void ActOnInitializerError(Decl *Dcl); 1045 void ActOnCXXForRangeDecl(Decl *D); 1046 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1047 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1048 void FinalizeDeclaration(Decl *D); 1049 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1050 Decl **Group, 1051 unsigned NumDecls); 1052 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1053 bool TypeMayContainAuto = true); 1054 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1055 SourceLocation LocAfterDecls); 1056 void CheckForFunctionRedefinition(FunctionDecl *FD); 1057 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1058 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1059 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1060 1061 void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope); 1062 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1063 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1064 1065 /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an 1066 /// attribute for which parsing is delayed. 1067 void ActOnFinishDelayedAttribute(Scope *S, Decl *D, ParsedAttributes &Attrs); 1068 1069 /// \brief Diagnose any unused parameters in the given sequence of 1070 /// ParmVarDecl pointers. 1071 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1072 ParmVarDecl * const *End); 1073 1074 /// \brief Diagnose whether the size of parameters or return value of a 1075 /// function or obj-c method definition is pass-by-value and larger than a 1076 /// specified threshold. 1077 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1078 ParmVarDecl * const *End, 1079 QualType ReturnTy, 1080 NamedDecl *D); 1081 1082 void DiagnoseInvalidJumps(Stmt *Body); 1083 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1084 SourceLocation AsmLoc, 1085 SourceLocation RParenLoc); 1086 1087 /// \brief The parser has processed a module import declaration. 1088 /// 1089 /// \param AtLoc The location of the '@' symbol, if any. 1090 /// 1091 /// \param ImportLoc The location of the 'import' keyword. 1092 /// 1093 /// \param Path The module access path. 1094 DeclResult ActOnModuleImport(SourceLocation AtLoc, SourceLocation ImportLoc, 1095 ModuleIdPath Path); 1096 1097 /// \brief Retrieve a suitable printing policy. 1098 PrintingPolicy getPrintingPolicy() const { 1099 return getPrintingPolicy(Context, PP); 1100 } 1101 1102 /// \brief Retrieve a suitable printing policy. 1103 static PrintingPolicy getPrintingPolicy(const ASTContext &Ctx, 1104 const Preprocessor &PP); 1105 1106 /// Scope actions. 1107 void ActOnPopScope(SourceLocation Loc, Scope *S); 1108 void ActOnTranslationUnitScope(Scope *S); 1109 1110 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1111 DeclSpec &DS); 1112 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1113 DeclSpec &DS, 1114 MultiTemplateParamsArg TemplateParams); 1115 1116 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1117 AccessSpecifier AS, 1118 RecordDecl *Record); 1119 1120 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1121 RecordDecl *Record); 1122 1123 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1124 TagTypeKind NewTag, bool isDefinition, 1125 SourceLocation NewTagLoc, 1126 const IdentifierInfo &Name); 1127 1128 enum TagUseKind { 1129 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1130 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1131 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1132 TUK_Friend // Friend declaration: 'friend struct foo;' 1133 }; 1134 1135 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1136 SourceLocation KWLoc, CXXScopeSpec &SS, 1137 IdentifierInfo *Name, SourceLocation NameLoc, 1138 AttributeList *Attr, AccessSpecifier AS, 1139 SourceLocation ModulePrivateLoc, 1140 MultiTemplateParamsArg TemplateParameterLists, 1141 bool &OwnedDecl, bool &IsDependent, 1142 SourceLocation ScopedEnumKWLoc, 1143 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1144 1145 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1146 unsigned TagSpec, SourceLocation TagLoc, 1147 CXXScopeSpec &SS, 1148 IdentifierInfo *Name, SourceLocation NameLoc, 1149 AttributeList *Attr, 1150 MultiTemplateParamsArg TempParamLists); 1151 1152 TypeResult ActOnDependentTag(Scope *S, 1153 unsigned TagSpec, 1154 TagUseKind TUK, 1155 const CXXScopeSpec &SS, 1156 IdentifierInfo *Name, 1157 SourceLocation TagLoc, 1158 SourceLocation NameLoc); 1159 1160 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1161 IdentifierInfo *ClassName, 1162 SmallVectorImpl<Decl *> &Decls); 1163 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1164 Declarator &D, Expr *BitfieldWidth); 1165 1166 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1167 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1168 AccessSpecifier AS); 1169 1170 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1171 TypeSourceInfo *TInfo, 1172 RecordDecl *Record, SourceLocation Loc, 1173 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1174 SourceLocation TSSL, 1175 AccessSpecifier AS, NamedDecl *PrevDecl, 1176 Declarator *D = 0); 1177 1178 enum CXXSpecialMember { 1179 CXXDefaultConstructor, 1180 CXXCopyConstructor, 1181 CXXMoveConstructor, 1182 CXXCopyAssignment, 1183 CXXMoveAssignment, 1184 CXXDestructor, 1185 CXXInvalid 1186 }; 1187 bool CheckNontrivialField(FieldDecl *FD); 1188 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1189 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1190 void ActOnLastBitfield(SourceLocation DeclStart, 1191 SmallVectorImpl<Decl *> &AllIvarDecls); 1192 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, 1193 Declarator &D, Expr *BitfieldWidth, 1194 tok::ObjCKeywordKind visibility); 1195 1196 // This is used for both record definitions and ObjC interface declarations. 1197 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1198 llvm::ArrayRef<Decl *> Fields, 1199 SourceLocation LBrac, SourceLocation RBrac, 1200 AttributeList *AttrList); 1201 1202 /// ActOnTagStartDefinition - Invoked when we have entered the 1203 /// scope of a tag's definition (e.g., for an enumeration, class, 1204 /// struct, or union). 1205 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1206 1207 Decl *ActOnObjCContainerStartDefinition(Decl *IDecl); 1208 1209 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1210 /// C++ record definition's base-specifiers clause and are starting its 1211 /// member declarations. 1212 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1213 SourceLocation FinalLoc, 1214 SourceLocation LBraceLoc); 1215 1216 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1217 /// the definition of a tag (enumeration, class, struct, or union). 1218 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1219 SourceLocation RBraceLoc); 1220 1221 void ActOnObjCContainerFinishDefinition(); 1222 1223 /// \brief Invoked when we must temporarily exit the objective-c container 1224 /// scope for parsing/looking-up C constructs. 1225 /// 1226 /// Must be followed by a call to \see ActOnObjCReenterContainerContext 1227 void ActOnObjCTemporaryExitContainerContext(DeclContext *DC); 1228 void ActOnObjCReenterContainerContext(DeclContext *DC); 1229 1230 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1231 /// error parsing the definition of a tag. 1232 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1233 1234 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1235 EnumConstantDecl *LastEnumConst, 1236 SourceLocation IdLoc, 1237 IdentifierInfo *Id, 1238 Expr *val); 1239 1240 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1241 SourceLocation IdLoc, IdentifierInfo *Id, 1242 AttributeList *Attrs, 1243 SourceLocation EqualLoc, Expr *Val); 1244 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1245 SourceLocation RBraceLoc, Decl *EnumDecl, 1246 Decl **Elements, unsigned NumElements, 1247 Scope *S, AttributeList *Attr); 1248 1249 DeclContext *getContainingDC(DeclContext *DC); 1250 1251 /// Set the current declaration context until it gets popped. 1252 void PushDeclContext(Scope *S, DeclContext *DC); 1253 void PopDeclContext(); 1254 1255 /// EnterDeclaratorContext - Used when we must lookup names in the context 1256 /// of a declarator's nested name specifier. 1257 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1258 void ExitDeclaratorContext(Scope *S); 1259 1260 /// Push the parameters of D, which must be a function, into scope. 1261 void ActOnReenterFunctionContext(Scope* S, Decl* D); 1262 void ActOnExitFunctionContext() { PopDeclContext(); } 1263 1264 DeclContext *getFunctionLevelDeclContext(); 1265 1266 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1267 /// to the function decl for the function being parsed. If we're currently 1268 /// in a 'block', this returns the containing context. 1269 FunctionDecl *getCurFunctionDecl(); 1270 1271 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1272 /// the method decl for the method being parsed. If we're currently 1273 /// in a 'block', this returns the containing context. 1274 ObjCMethodDecl *getCurMethodDecl(); 1275 1276 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1277 /// or C function we're in, otherwise return null. If we're currently 1278 /// in a 'block', this returns the containing context. 1279 NamedDecl *getCurFunctionOrMethodDecl(); 1280 1281 /// Add this decl to the scope shadowed decl chains. 1282 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1283 1284 /// \brief Make the given externally-produced declaration visible at the 1285 /// top level scope. 1286 /// 1287 /// \param D The externally-produced declaration to push. 1288 /// 1289 /// \param Name The name of the externally-produced declaration. 1290 void pushExternalDeclIntoScope(NamedDecl *D, DeclarationName Name); 1291 1292 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1293 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1294 /// true if 'D' belongs to the given declaration context. 1295 /// 1296 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1297 /// whether the declaration is in scope for the purposes of explicit template 1298 /// instantiation or specialization. The default is false. 1299 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1300 bool ExplicitInstantiationOrSpecialization = false); 1301 1302 /// Finds the scope corresponding to the given decl context, if it 1303 /// happens to be an enclosing scope. Otherwise return NULL. 1304 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1305 1306 /// Subroutines of ActOnDeclarator(). 1307 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1308 TypeSourceInfo *TInfo); 1309 bool isIncompatibleTypedef(TypeDecl *Old, TypedefNameDecl *New); 1310 void mergeDeclAttributes(Decl *New, Decl *Old, bool MergeDeprecation = true); 1311 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1312 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1313 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1314 void mergeObjCMethodDecls(ObjCMethodDecl *New, ObjCMethodDecl *Old); 1315 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1316 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1317 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1318 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1319 1320 // AssignmentAction - This is used by all the assignment diagnostic functions 1321 // to represent what is actually causing the operation 1322 enum AssignmentAction { 1323 AA_Assigning, 1324 AA_Passing, 1325 AA_Returning, 1326 AA_Converting, 1327 AA_Initializing, 1328 AA_Sending, 1329 AA_Casting 1330 }; 1331 1332 /// C++ Overloading. 1333 enum OverloadKind { 1334 /// This is a legitimate overload: the existing declarations are 1335 /// functions or function templates with different signatures. 1336 Ovl_Overload, 1337 1338 /// This is not an overload because the signature exactly matches 1339 /// an existing declaration. 1340 Ovl_Match, 1341 1342 /// This is not an overload because the lookup results contain a 1343 /// non-function. 1344 Ovl_NonFunction 1345 }; 1346 OverloadKind CheckOverload(Scope *S, 1347 FunctionDecl *New, 1348 const LookupResult &OldDecls, 1349 NamedDecl *&OldDecl, 1350 bool IsForUsingDecl); 1351 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1352 1353 /// \brief Checks availability of the function depending on the current 1354 /// function context.Inside an unavailable function,unavailability is ignored. 1355 /// 1356 /// \returns true if \arg FD is unavailable and current context is inside 1357 /// an available function, false otherwise. 1358 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1359 1360 ImplicitConversionSequence 1361 TryImplicitConversion(Expr *From, QualType ToType, 1362 bool SuppressUserConversions, 1363 bool AllowExplicit, 1364 bool InOverloadResolution, 1365 bool CStyle, 1366 bool AllowObjCWritebackConversion); 1367 1368 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1369 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1370 bool IsComplexPromotion(QualType FromType, QualType ToType); 1371 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1372 bool InOverloadResolution, 1373 QualType& ConvertedType, bool &IncompatibleObjC); 1374 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1375 QualType& ConvertedType, bool &IncompatibleObjC); 1376 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1377 QualType &ConvertedType); 1378 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1379 QualType& ConvertedType); 1380 bool isSentinelNullExpr(const Expr *E) const; 1381 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1382 const FunctionProtoType *NewType, 1383 unsigned *ArgPos = 0); 1384 void HandleFunctionTypeMismatch(PartialDiagnostic &PDiag, 1385 QualType FromType, QualType ToType); 1386 1387 CastKind PrepareCastToObjCObjectPointer(ExprResult &E); 1388 bool CheckPointerConversion(Expr *From, QualType ToType, 1389 CastKind &Kind, 1390 CXXCastPath& BasePath, 1391 bool IgnoreBaseAccess); 1392 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1393 bool InOverloadResolution, 1394 QualType &ConvertedType); 1395 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1396 CastKind &Kind, 1397 CXXCastPath &BasePath, 1398 bool IgnoreBaseAccess); 1399 bool IsQualificationConversion(QualType FromType, QualType ToType, 1400 bool CStyle, bool &ObjCLifetimeConversion); 1401 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1402 QualType &ResultTy); 1403 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1404 1405 1406 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1407 const VarDecl *NRVOCandidate, 1408 QualType ResultType, 1409 Expr *Value, 1410 bool AllowNRVO = true); 1411 1412 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1413 ExprResult Init); 1414 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1415 SourceLocation EqualLoc, 1416 ExprResult Init, 1417 bool TopLevelOfInitList = false); 1418 ExprResult PerformObjectArgumentInitialization(Expr *From, 1419 NestedNameSpecifier *Qualifier, 1420 NamedDecl *FoundDecl, 1421 CXXMethodDecl *Method); 1422 1423 ExprResult PerformContextuallyConvertToBool(Expr *From); 1424 ExprResult PerformContextuallyConvertToObjCPointer(Expr *From); 1425 1426 /// Contexts in which a converted constant expression is required. 1427 enum CCEKind { 1428 CCEK_CaseValue, ///< Expression in a case label. 1429 CCEK_Enumerator, ///< Enumerator value with fixed underlying type. 1430 CCEK_TemplateArg ///< Value of a non-type template parameter. 1431 }; 1432 ExprResult CheckConvertedConstantExpression(Expr *From, QualType T, 1433 llvm::APSInt &Value, CCEKind CCE); 1434 1435 ExprResult 1436 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1437 const PartialDiagnostic &NotIntDiag, 1438 const PartialDiagnostic &IncompleteDiag, 1439 const PartialDiagnostic &ExplicitConvDiag, 1440 const PartialDiagnostic &ExplicitConvNote, 1441 const PartialDiagnostic &AmbigDiag, 1442 const PartialDiagnostic &AmbigNote, 1443 const PartialDiagnostic &ConvDiag); 1444 1445 ExprResult PerformObjectMemberConversion(Expr *From, 1446 NestedNameSpecifier *Qualifier, 1447 NamedDecl *FoundDecl, 1448 NamedDecl *Member); 1449 1450 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1451 // TODO: make this is a typesafe union. 1452 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1453 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1454 1455 void AddOverloadCandidate(NamedDecl *Function, 1456 DeclAccessPair FoundDecl, 1457 Expr **Args, unsigned NumArgs, 1458 OverloadCandidateSet &CandidateSet); 1459 1460 void AddOverloadCandidate(FunctionDecl *Function, 1461 DeclAccessPair FoundDecl, 1462 Expr **Args, unsigned NumArgs, 1463 OverloadCandidateSet& CandidateSet, 1464 bool SuppressUserConversions = false, 1465 bool PartialOverloading = false); 1466 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1467 Expr **Args, unsigned NumArgs, 1468 OverloadCandidateSet& CandidateSet, 1469 bool SuppressUserConversions = false); 1470 void AddMethodCandidate(DeclAccessPair FoundDecl, 1471 QualType ObjectType, 1472 Expr::Classification ObjectClassification, 1473 Expr **Args, unsigned NumArgs, 1474 OverloadCandidateSet& CandidateSet, 1475 bool SuppressUserConversion = false); 1476 void AddMethodCandidate(CXXMethodDecl *Method, 1477 DeclAccessPair FoundDecl, 1478 CXXRecordDecl *ActingContext, QualType ObjectType, 1479 Expr::Classification ObjectClassification, 1480 Expr **Args, unsigned NumArgs, 1481 OverloadCandidateSet& CandidateSet, 1482 bool SuppressUserConversions = false); 1483 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1484 DeclAccessPair FoundDecl, 1485 CXXRecordDecl *ActingContext, 1486 TemplateArgumentListInfo *ExplicitTemplateArgs, 1487 QualType ObjectType, 1488 Expr::Classification ObjectClassification, 1489 Expr **Args, unsigned NumArgs, 1490 OverloadCandidateSet& CandidateSet, 1491 bool SuppressUserConversions = false); 1492 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1493 DeclAccessPair FoundDecl, 1494 TemplateArgumentListInfo *ExplicitTemplateArgs, 1495 Expr **Args, unsigned NumArgs, 1496 OverloadCandidateSet& CandidateSet, 1497 bool SuppressUserConversions = false); 1498 void AddConversionCandidate(CXXConversionDecl *Conversion, 1499 DeclAccessPair FoundDecl, 1500 CXXRecordDecl *ActingContext, 1501 Expr *From, QualType ToType, 1502 OverloadCandidateSet& CandidateSet); 1503 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1504 DeclAccessPair FoundDecl, 1505 CXXRecordDecl *ActingContext, 1506 Expr *From, QualType ToType, 1507 OverloadCandidateSet &CandidateSet); 1508 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1509 DeclAccessPair FoundDecl, 1510 CXXRecordDecl *ActingContext, 1511 const FunctionProtoType *Proto, 1512 Expr *Object, Expr **Args, unsigned NumArgs, 1513 OverloadCandidateSet& CandidateSet); 1514 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1515 SourceLocation OpLoc, 1516 Expr **Args, unsigned NumArgs, 1517 OverloadCandidateSet& CandidateSet, 1518 SourceRange OpRange = SourceRange()); 1519 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1520 Expr **Args, unsigned NumArgs, 1521 OverloadCandidateSet& CandidateSet, 1522 bool IsAssignmentOperator = false, 1523 unsigned NumContextualBoolArguments = 0); 1524 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1525 SourceLocation OpLoc, 1526 Expr **Args, unsigned NumArgs, 1527 OverloadCandidateSet& CandidateSet); 1528 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1529 bool Operator, 1530 Expr **Args, unsigned NumArgs, 1531 TemplateArgumentListInfo *ExplicitTemplateArgs, 1532 OverloadCandidateSet& CandidateSet, 1533 bool PartialOverloading = false, 1534 bool StdNamespaceIsAssociated = false); 1535 1536 // Emit as a 'note' the specific overload candidate 1537 void NoteOverloadCandidate(FunctionDecl *Fn, QualType DestType = QualType()); 1538 1539 // Emit as a series of 'note's all template and non-templates 1540 // identified by the expression Expr 1541 void NoteAllOverloadCandidates(Expr* E, QualType DestType = QualType()); 1542 1543 // [PossiblyAFunctionType] --> [Return] 1544 // NonFunctionType --> NonFunctionType 1545 // R (A) --> R(A) 1546 // R (*)(A) --> R (A) 1547 // R (&)(A) --> R (A) 1548 // R (S::*)(A) --> R (A) 1549 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1550 1551 FunctionDecl * 1552 ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, 1553 QualType TargetType, 1554 bool Complain, 1555 DeclAccessPair &Found, 1556 bool *pHadMultipleCandidates = 0); 1557 1558 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1559 bool Complain = false, 1560 DeclAccessPair* Found = 0); 1561 1562 bool ResolveAndFixSingleFunctionTemplateSpecialization( 1563 ExprResult &SrcExpr, 1564 bool DoFunctionPointerConverion = false, 1565 bool Complain = false, 1566 const SourceRange& OpRangeForComplaining = SourceRange(), 1567 QualType DestTypeForComplaining = QualType(), 1568 unsigned DiagIDForComplaining = 0); 1569 1570 1571 Expr *FixOverloadedFunctionReference(Expr *E, 1572 DeclAccessPair FoundDecl, 1573 FunctionDecl *Fn); 1574 ExprResult FixOverloadedFunctionReference(ExprResult, 1575 DeclAccessPair FoundDecl, 1576 FunctionDecl *Fn); 1577 1578 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1579 Expr **Args, unsigned NumArgs, 1580 OverloadCandidateSet &CandidateSet, 1581 bool PartialOverloading = false); 1582 1583 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1584 UnresolvedLookupExpr *ULE, 1585 SourceLocation LParenLoc, 1586 Expr **Args, unsigned NumArgs, 1587 SourceLocation RParenLoc, 1588 Expr *ExecConfig, 1589 bool AllowTypoCorrection=true); 1590 1591 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1592 unsigned Opc, 1593 const UnresolvedSetImpl &Fns, 1594 Expr *input); 1595 1596 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1597 unsigned Opc, 1598 const UnresolvedSetImpl &Fns, 1599 Expr *LHS, Expr *RHS); 1600 1601 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1602 SourceLocation RLoc, 1603 Expr *Base,Expr *Idx); 1604 1605 ExprResult 1606 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1607 SourceLocation LParenLoc, Expr **Args, 1608 unsigned NumArgs, SourceLocation RParenLoc); 1609 ExprResult 1610 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1611 Expr **Args, unsigned NumArgs, 1612 SourceLocation RParenLoc); 1613 1614 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1615 SourceLocation OpLoc); 1616 1617 /// CheckCallReturnType - Checks that a call expression's return type is 1618 /// complete. Returns true on failure. The location passed in is the location 1619 /// that best represents the call. 1620 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1621 CallExpr *CE, FunctionDecl *FD); 1622 1623 /// Helpers for dealing with blocks and functions. 1624 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1625 bool CheckParameterNames); 1626 void CheckCXXDefaultArguments(FunctionDecl *FD); 1627 void CheckExtraCXXDefaultArguments(Declarator &D); 1628 Scope *getNonFieldDeclScope(Scope *S); 1629 1630 /// \name Name lookup 1631 /// 1632 /// These routines provide name lookup that is used during semantic 1633 /// analysis to resolve the various kinds of names (identifiers, 1634 /// overloaded operator names, constructor names, etc.) into zero or 1635 /// more declarations within a particular scope. The major entry 1636 /// points are LookupName, which performs unqualified name lookup, 1637 /// and LookupQualifiedName, which performs qualified name lookup. 1638 /// 1639 /// All name lookup is performed based on some specific criteria, 1640 /// which specify what names will be visible to name lookup and how 1641 /// far name lookup should work. These criteria are important both 1642 /// for capturing language semantics (certain lookups will ignore 1643 /// certain names, for example) and for performance, since name 1644 /// lookup is often a bottleneck in the compilation of C++. Name 1645 /// lookup criteria is specified via the LookupCriteria enumeration. 1646 /// 1647 /// The results of name lookup can vary based on the kind of name 1648 /// lookup performed, the current language, and the translation 1649 /// unit. In C, for example, name lookup will either return nothing 1650 /// (no entity found) or a single declaration. In C++, name lookup 1651 /// can additionally refer to a set of overloaded functions or 1652 /// result in an ambiguity. All of the possible results of name 1653 /// lookup are captured by the LookupResult class, which provides 1654 /// the ability to distinguish among them. 1655 //@{ 1656 1657 /// @brief Describes the kind of name lookup to perform. 1658 enum LookupNameKind { 1659 /// Ordinary name lookup, which finds ordinary names (functions, 1660 /// variables, typedefs, etc.) in C and most kinds of names 1661 /// (functions, variables, members, types, etc.) in C++. 1662 LookupOrdinaryName = 0, 1663 /// Tag name lookup, which finds the names of enums, classes, 1664 /// structs, and unions. 1665 LookupTagName, 1666 /// Label name lookup. 1667 LookupLabel, 1668 /// Member name lookup, which finds the names of 1669 /// class/struct/union members. 1670 LookupMemberName, 1671 /// Look up of an operator name (e.g., operator+) for use with 1672 /// operator overloading. This lookup is similar to ordinary name 1673 /// lookup, but will ignore any declarations that are class members. 1674 LookupOperatorName, 1675 /// Look up of a name that precedes the '::' scope resolution 1676 /// operator in C++. This lookup completely ignores operator, object, 1677 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1678 LookupNestedNameSpecifierName, 1679 /// Look up a namespace name within a C++ using directive or 1680 /// namespace alias definition, ignoring non-namespace names (C++ 1681 /// [basic.lookup.udir]p1). 1682 LookupNamespaceName, 1683 /// Look up all declarations in a scope with the given name, 1684 /// including resolved using declarations. This is appropriate 1685 /// for checking redeclarations for a using declaration. 1686 LookupUsingDeclName, 1687 /// Look up an ordinary name that is going to be redeclared as a 1688 /// name with linkage. This lookup ignores any declarations that 1689 /// are outside of the current scope unless they have linkage. See 1690 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1691 LookupRedeclarationWithLinkage, 1692 /// Look up the name of an Objective-C protocol. 1693 LookupObjCProtocolName, 1694 /// Look up implicit 'self' parameter of an objective-c method. 1695 LookupObjCImplicitSelfParam, 1696 /// \brief Look up any declaration with any name. 1697 LookupAnyName 1698 }; 1699 1700 /// \brief Specifies whether (or how) name lookup is being performed for a 1701 /// redeclaration (vs. a reference). 1702 enum RedeclarationKind { 1703 /// \brief The lookup is a reference to this name that is not for the 1704 /// purpose of redeclaring the name. 1705 NotForRedeclaration = 0, 1706 /// \brief The lookup results will be used for redeclaration of a name, 1707 /// if an entity by that name already exists. 1708 ForRedeclaration 1709 }; 1710 1711private: 1712 bool CppLookupName(LookupResult &R, Scope *S); 1713 1714 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1715 CXXSpecialMember SM, 1716 bool ConstArg, 1717 bool VolatileArg, 1718 bool RValueThis, 1719 bool ConstThis, 1720 bool VolatileThis); 1721 1722 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1723 // 1724 // The boolean value will be true to indicate that the namespace was loaded 1725 // from an AST/PCH file, or false otherwise. 1726 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1727 1728 /// \brief Whether we have already loaded known namespaces from an extenal 1729 /// source. 1730 bool LoadedExternalKnownNamespaces; 1731 1732public: 1733 /// \brief Look up a name, looking for a single declaration. Return 1734 /// null if the results were absent, ambiguous, or overloaded. 1735 /// 1736 /// It is preferable to use the elaborated form and explicitly handle 1737 /// ambiguity and overloaded. 1738 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1739 SourceLocation Loc, 1740 LookupNameKind NameKind, 1741 RedeclarationKind Redecl 1742 = NotForRedeclaration); 1743 bool LookupName(LookupResult &R, Scope *S, 1744 bool AllowBuiltinCreation = false); 1745 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1746 bool InUnqualifiedLookup = false); 1747 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1748 bool AllowBuiltinCreation = false, 1749 bool EnteringContext = false); 1750 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc, 1751 RedeclarationKind Redecl 1752 = NotForRedeclaration); 1753 1754 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1755 QualType T1, QualType T2, 1756 UnresolvedSetImpl &Functions); 1757 1758 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1759 SourceLocation GnuLabelLoc = SourceLocation()); 1760 1761 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1762 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1763 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1764 unsigned Quals, 1765 bool *ConstParam = 0); 1766 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1767 bool RValueThis, unsigned ThisQuals, 1768 bool *ConstParam = 0); 1769 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class); 1770 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, bool RValueThis, 1771 unsigned ThisQuals); 1772 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1773 1774 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1775 Expr **Args, unsigned NumArgs, 1776 ADLResult &Functions, 1777 bool StdNamespaceIsAssociated = false); 1778 1779 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1780 VisibleDeclConsumer &Consumer, 1781 bool IncludeGlobalScope = true); 1782 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1783 VisibleDeclConsumer &Consumer, 1784 bool IncludeGlobalScope = true); 1785 1786 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1787 Sema::LookupNameKind LookupKind, 1788 Scope *S, CXXScopeSpec *SS, 1789 CorrectionCandidateCallback &CCC, 1790 DeclContext *MemberContext = 0, 1791 bool EnteringContext = false, 1792 const ObjCObjectPointerType *OPT = 0); 1793 1794 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1795 AssociatedNamespaceSet &AssociatedNamespaces, 1796 AssociatedClassSet &AssociatedClasses); 1797 1798 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1799 bool ConsiderLinkage, 1800 bool ExplicitInstantiationOrSpecialization); 1801 1802 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1803 //@} 1804 1805 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1806 SourceLocation IdLoc, 1807 bool TypoCorrection = false); 1808 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1809 Scope *S, bool ForRedeclaration, 1810 SourceLocation Loc); 1811 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1812 Scope *S); 1813 void AddKnownFunctionAttributes(FunctionDecl *FD); 1814 1815 // More parsing and symbol table subroutines. 1816 1817 // Decl attributes - this routine is the top level dispatcher. 1818 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1819 bool NonInheritable = true, bool Inheritable = true); 1820 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1821 bool NonInheritable = true, bool Inheritable = true); 1822 bool ProcessAccessDeclAttributeList(AccessSpecDecl *ASDecl, 1823 const AttributeList *AttrList); 1824 1825 void checkUnusedDeclAttributes(Declarator &D); 1826 1827 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1828 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1829 bool CheckNoReturnAttr(const AttributeList &attr); 1830 1831 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1832 bool &IncompleteImpl, unsigned DiagID); 1833 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 1834 ObjCMethodDecl *MethodDecl, 1835 bool IsProtocolMethodDecl); 1836 1837 void CheckConflictingOverridingMethod(ObjCMethodDecl *Method, 1838 ObjCMethodDecl *Overridden, 1839 bool IsProtocolMethodDecl); 1840 1841 /// WarnExactTypedMethods - This routine issues a warning if method 1842 /// implementation declaration matches exactly that of its declaration. 1843 void WarnExactTypedMethods(ObjCMethodDecl *Method, 1844 ObjCMethodDecl *MethodDecl, 1845 bool IsProtocolMethodDecl); 1846 1847 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1848 ObjCInterfaceDecl *IDecl); 1849 1850 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1851 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap; 1852 1853 /// CheckProtocolMethodDefs - This routine checks unimplemented 1854 /// methods declared in protocol, and those referenced by it. 1855 /// \param IDecl - Used for checking for methods which may have been 1856 /// inherited. 1857 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1858 ObjCProtocolDecl *PDecl, 1859 bool& IncompleteImpl, 1860 const SelectorSet &InsMap, 1861 const SelectorSet &ClsMap, 1862 ObjCContainerDecl *CDecl); 1863 1864 /// CheckImplementationIvars - This routine checks if the instance variables 1865 /// listed in the implelementation match those listed in the interface. 1866 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1867 ObjCIvarDecl **Fields, unsigned nIvars, 1868 SourceLocation Loc); 1869 1870 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1871 /// remains unimplemented in the class or category @implementation. 1872 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1873 ObjCContainerDecl* IDecl, 1874 bool IncompleteImpl = false); 1875 1876 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1877 /// which must be implemented by this implementation. 1878 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1879 ObjCContainerDecl *CDecl, 1880 const SelectorSet &InsMap); 1881 1882 /// DefaultSynthesizeProperties - This routine default synthesizes all 1883 /// properties which must be synthesized in class's @implementation. 1884 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1885 ObjCInterfaceDecl *IDecl); 1886 void DefaultSynthesizeProperties(Scope *S, Decl *D); 1887 1888 /// CollectImmediateProperties - This routine collects all properties in 1889 /// the class and its conforming protocols; but not those it its super class. 1890 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1891 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1892 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1893 1894 1895 /// LookupPropertyDecl - Looks up a property in the current class and all 1896 /// its protocols. 1897 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1898 IdentifierInfo *II); 1899 1900 /// Called by ActOnProperty to handle @property declarations in 1901 //// class extensions. 1902 Decl *HandlePropertyInClassExtension(Scope *S, 1903 SourceLocation AtLoc, 1904 FieldDeclarator &FD, 1905 Selector GetterSel, 1906 Selector SetterSel, 1907 const bool isAssign, 1908 const bool isReadWrite, 1909 const unsigned Attributes, 1910 const unsigned AttributesAsWritten, 1911 bool *isOverridingProperty, 1912 TypeSourceInfo *T, 1913 tok::ObjCKeywordKind MethodImplKind); 1914 1915 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1916 /// handle creating the ObjcPropertyDecl for a category or @interface. 1917 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1918 ObjCContainerDecl *CDecl, 1919 SourceLocation AtLoc, 1920 FieldDeclarator &FD, 1921 Selector GetterSel, 1922 Selector SetterSel, 1923 const bool isAssign, 1924 const bool isReadWrite, 1925 const unsigned Attributes, 1926 const unsigned AttributesAsWritten, 1927 TypeSourceInfo *T, 1928 tok::ObjCKeywordKind MethodImplKind, 1929 DeclContext *lexicalDC = 0); 1930 1931 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1932 /// warning) when atomic property has one but not the other user-declared 1933 /// setter or getter. 1934 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1935 ObjCContainerDecl* IDecl); 1936 1937 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 1938 1939 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1940 1941 enum MethodMatchStrategy { 1942 MMS_loose, 1943 MMS_strict 1944 }; 1945 1946 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1947 /// true, or false, accordingly. 1948 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1949 const ObjCMethodDecl *PrevMethod, 1950 MethodMatchStrategy strategy = MMS_strict); 1951 1952 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1953 /// or protocol against those declared in their implementations. 1954 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1955 const SelectorSet &ClsMap, 1956 SelectorSet &InsMapSeen, 1957 SelectorSet &ClsMapSeen, 1958 ObjCImplDecl* IMPDecl, 1959 ObjCContainerDecl* IDecl, 1960 bool &IncompleteImpl, 1961 bool ImmediateClass, 1962 bool WarnExactMatch=false); 1963 1964 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in 1965 /// category matches with those implemented in its primary class and 1966 /// warns each time an exact match is found. 1967 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP); 1968 1969 /// \brief Add the given method to the list of globally-known methods. 1970 void addMethodToGlobalList(ObjCMethodList *List, ObjCMethodDecl *Method); 1971 1972private: 1973 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1974 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1975 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1976 1977 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1978 /// optionally warns if there are multiple signatures. 1979 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1980 bool receiverIdOrClass, 1981 bool warn, bool instance); 1982 1983public: 1984 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1985 /// unit are added to a global pool. This allows us to efficiently associate 1986 /// a selector with a method declaraation for purposes of typechecking 1987 /// messages sent to "id" (where the class of the object is unknown). 1988 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1989 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1990 } 1991 1992 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1993 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1994 AddMethodToGlobalPool(Method, impl, /*instance*/false); 1995 } 1996 1997 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global 1998 /// pool. 1999 void AddAnyMethodToGlobalPool(Decl *D); 2000 2001 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 2002 /// there are multiple signatures. 2003 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 2004 bool receiverIdOrClass=false, 2005 bool warn=true) { 2006 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2007 warn, /*instance*/true); 2008 } 2009 2010 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 2011 /// there are multiple signatures. 2012 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 2013 bool receiverIdOrClass=false, 2014 bool warn=true) { 2015 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2016 warn, /*instance*/false); 2017 } 2018 2019 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 2020 /// implementation. 2021 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 2022 2023 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 2024 /// initialization. 2025 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 2026 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 2027 2028 //===--------------------------------------------------------------------===// 2029 // Statement Parsing Callbacks: SemaStmt.cpp. 2030public: 2031 class FullExprArg { 2032 public: 2033 FullExprArg(Sema &actions) : E(0) { } 2034 2035 // FIXME: The const_cast here is ugly. RValue references would make this 2036 // much nicer (or we could duplicate a bunch of the move semantics 2037 // emulation code from Ownership.h). 2038 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 2039 2040 ExprResult release() { 2041 return move(E); 2042 } 2043 2044 Expr *get() const { return E; } 2045 2046 Expr *operator->() { 2047 return E; 2048 } 2049 2050 private: 2051 // FIXME: No need to make the entire Sema class a friend when it's just 2052 // Sema::MakeFullExpr that needs access to the constructor below. 2053 friend class Sema; 2054 2055 explicit FullExprArg(Expr *expr) : E(expr) {} 2056 2057 Expr *E; 2058 }; 2059 2060 FullExprArg MakeFullExpr(Expr *Arg) { 2061 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 2062 } 2063 2064 StmtResult ActOnExprStmt(FullExprArg Expr); 2065 2066 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 2067 bool HasLeadingEmptyMacro = false); 2068 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 2069 MultiStmtArg Elts, 2070 bool isStmtExpr); 2071 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2072 SourceLocation StartLoc, 2073 SourceLocation EndLoc); 2074 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2075 StmtResult ActOnForEachLValueExpr(Expr *E); 2076 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2077 SourceLocation DotDotDotLoc, Expr *RHSVal, 2078 SourceLocation ColonLoc); 2079 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2080 2081 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2082 SourceLocation ColonLoc, 2083 Stmt *SubStmt, Scope *CurScope); 2084 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2085 SourceLocation ColonLoc, Stmt *SubStmt); 2086 2087 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2088 FullExprArg CondVal, Decl *CondVar, 2089 Stmt *ThenVal, 2090 SourceLocation ElseLoc, Stmt *ElseVal); 2091 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2092 Expr *Cond, 2093 Decl *CondVar); 2094 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2095 Stmt *Switch, Stmt *Body); 2096 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2097 FullExprArg Cond, 2098 Decl *CondVar, Stmt *Body); 2099 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2100 SourceLocation WhileLoc, 2101 SourceLocation CondLParen, Expr *Cond, 2102 SourceLocation CondRParen); 2103 2104 StmtResult ActOnForStmt(SourceLocation ForLoc, 2105 SourceLocation LParenLoc, 2106 Stmt *First, FullExprArg Second, 2107 Decl *SecondVar, 2108 FullExprArg Third, 2109 SourceLocation RParenLoc, 2110 Stmt *Body); 2111 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc, 2112 Expr *collection); 2113 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2114 SourceLocation LParenLoc, 2115 Stmt *First, Expr *Second, 2116 SourceLocation RParenLoc, Stmt *Body); 2117 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2118 SourceLocation LParenLoc, Stmt *LoopVar, 2119 SourceLocation ColonLoc, Expr *Collection, 2120 SourceLocation RParenLoc); 2121 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2122 SourceLocation ColonLoc, 2123 Stmt *RangeDecl, Stmt *BeginEndDecl, 2124 Expr *Cond, Expr *Inc, 2125 Stmt *LoopVarDecl, 2126 SourceLocation RParenLoc); 2127 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2128 2129 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2130 SourceLocation LabelLoc, 2131 LabelDecl *TheDecl); 2132 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2133 SourceLocation StarLoc, 2134 Expr *DestExp); 2135 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2136 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2137 2138 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2139 bool AllowFunctionParameters); 2140 2141 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2142 StmtResult ActOnCapScopeReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2143 2144 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2145 bool IsSimple, bool IsVolatile, 2146 unsigned NumOutputs, unsigned NumInputs, 2147 IdentifierInfo **Names, 2148 MultiExprArg Constraints, 2149 MultiExprArg Exprs, 2150 Expr *AsmString, 2151 MultiExprArg Clobbers, 2152 SourceLocation RParenLoc, 2153 bool MSAsm = false); 2154 2155 2156 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2157 SourceLocation StartLoc, 2158 SourceLocation IdLoc, IdentifierInfo *Id, 2159 bool Invalid = false); 2160 2161 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2162 2163 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2164 Decl *Parm, Stmt *Body); 2165 2166 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2167 2168 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2169 MultiStmtArg Catch, Stmt *Finally); 2170 2171 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2172 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2173 Scope *CurScope); 2174 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, 2175 Expr *operand); 2176 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2177 Expr *SynchExpr, 2178 Stmt *SynchBody); 2179 2180 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2181 2182 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2183 SourceLocation StartLoc, 2184 SourceLocation IdLoc, 2185 IdentifierInfo *Id); 2186 2187 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2188 2189 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2190 Decl *ExDecl, Stmt *HandlerBlock); 2191 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2192 MultiStmtArg Handlers); 2193 2194 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2195 SourceLocation TryLoc, 2196 Stmt *TryBlock, 2197 Stmt *Handler); 2198 2199 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2200 Expr *FilterExpr, 2201 Stmt *Block); 2202 2203 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2204 Stmt *Block); 2205 2206 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2207 2208 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2209 2210 /// \brief If it's a file scoped decl that must warn if not used, keep track 2211 /// of it. 2212 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2213 2214 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2215 /// whose result is unused, warn. 2216 void DiagnoseUnusedExprResult(const Stmt *S); 2217 void DiagnoseUnusedDecl(const NamedDecl *ND); 2218 2219 ParsingDeclState PushParsingDeclaration() { 2220 return DelayedDiagnostics.pushParsingDecl(); 2221 } 2222 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2223 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2224 } 2225 2226 typedef ProcessingContextState ParsingClassState; 2227 ParsingClassState PushParsingClass() { 2228 return DelayedDiagnostics.pushContext(); 2229 } 2230 void PopParsingClass(ParsingClassState state) { 2231 DelayedDiagnostics.popContext(state); 2232 } 2233 2234 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2235 SourceLocation Loc, 2236 const ObjCInterfaceDecl *UnknownObjCClass=0); 2237 2238 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2239 2240 bool makeUnavailableInSystemHeader(SourceLocation loc, 2241 StringRef message); 2242 2243 //===--------------------------------------------------------------------===// 2244 // Expression Parsing Callbacks: SemaExpr.cpp. 2245 2246 bool CanUseDecl(NamedDecl *D); 2247 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2248 const ObjCInterfaceDecl *UnknownObjCClass=0); 2249 AvailabilityResult DiagnoseAvailabilityOfDecl(NamedDecl *D, 2250 SourceLocation Loc, 2251 const ObjCInterfaceDecl *UnknownObjCClass); 2252 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2253 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2254 ObjCMethodDecl *Getter, 2255 SourceLocation Loc); 2256 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2257 Expr **Args, unsigned NumArgs); 2258 2259 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 2260 2261 void PopExpressionEvaluationContext(); 2262 2263 void DiscardCleanupsInEvaluationContext(); 2264 2265 ExprResult TranformToPotentiallyEvaluated(Expr *E); 2266 ExprResult HandleExprEvaluationContextForTypeof(Expr *E); 2267 2268 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 2269 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2270 void MarkDeclarationsReferencedInExpr(Expr *E); 2271 2272 /// \brief Try to recover by turning the given expression into a 2273 /// call. Returns true if recovery was attempted or an error was 2274 /// emitted; this may also leave the ExprResult invalid. 2275 bool tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD, 2276 bool ForceComplain = false, 2277 bool (*IsPlausibleResult)(QualType) = 0); 2278 2279 /// \brief Figure out if an expression could be turned into a call. 2280 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2281 UnresolvedSetImpl &NonTemplateOverloads); 2282 2283 /// \brief Conditionally issue a diagnostic based on the current 2284 /// evaluation context. 2285 /// 2286 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2287 /// the function body is parsed, and then do a basic reachability analysis to 2288 /// determine if the statement is reachable. If it is unreachable, the 2289 /// diagnostic will not be emitted. 2290 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement, 2291 const PartialDiagnostic &PD); 2292 2293 // Primary Expressions. 2294 SourceRange getExprRange(Expr *E) const; 2295 2296 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, 2297 SourceLocation TemplateKWLoc, 2298 UnqualifiedId &Id, 2299 bool HasTrailingLParen, bool IsAddressOfOperand, 2300 CorrectionCandidateCallback *CCC = 0); 2301 2302 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2303 TemplateArgumentListInfo &Buffer, 2304 DeclarationNameInfo &NameInfo, 2305 const TemplateArgumentListInfo *&TemplateArgs); 2306 2307 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2308 CorrectionCandidateCallback &CCC, 2309 TemplateArgumentListInfo *ExplicitTemplateArgs = 0, 2310 Expr **Args = 0, unsigned NumArgs = 0); 2311 2312 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S, 2313 IdentifierInfo *II, 2314 bool AllowBuiltinCreation=false); 2315 2316 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2317 SourceLocation TemplateKWLoc, 2318 const DeclarationNameInfo &NameInfo, 2319 bool isAddressOfOperand, 2320 const TemplateArgumentListInfo *TemplateArgs); 2321 2322 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2323 ExprValueKind VK, 2324 SourceLocation Loc, 2325 const CXXScopeSpec *SS = 0); 2326 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2327 ExprValueKind VK, 2328 const DeclarationNameInfo &NameInfo, 2329 const CXXScopeSpec *SS = 0); 2330 ExprResult 2331 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2332 SourceLocation nameLoc, 2333 IndirectFieldDecl *indirectField, 2334 Expr *baseObjectExpr = 0, 2335 SourceLocation opLoc = SourceLocation()); 2336 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2337 SourceLocation TemplateKWLoc, 2338 LookupResult &R, 2339 const TemplateArgumentListInfo *TemplateArgs); 2340 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2341 SourceLocation TemplateKWLoc, 2342 LookupResult &R, 2343 const TemplateArgumentListInfo *TemplateArgs, 2344 bool IsDefiniteInstance); 2345 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2346 const LookupResult &R, 2347 bool HasTrailingLParen); 2348 2349 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2350 SourceLocation TemplateKWLoc, 2351 const DeclarationNameInfo &NameInfo); 2352 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2353 SourceLocation TemplateKWLoc, 2354 const DeclarationNameInfo &NameInfo, 2355 const TemplateArgumentListInfo *TemplateArgs); 2356 2357 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2358 LookupResult &R, 2359 bool NeedsADL); 2360 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2361 const DeclarationNameInfo &NameInfo, 2362 NamedDecl *D); 2363 2364 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2365 ExprResult ActOnNumericConstant(const Token &Tok); 2366 ExprResult ActOnCharacterConstant(const Token &Tok); 2367 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E); 2368 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2369 SourceLocation R, 2370 MultiExprArg Val); 2371 2372 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2373 /// fragments (e.g. "foo" "bar" L"baz"). 2374 ExprResult ActOnStringLiteral(const Token *StringToks, 2375 unsigned NumStringToks); 2376 2377 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2378 SourceLocation DefaultLoc, 2379 SourceLocation RParenLoc, 2380 Expr *ControllingExpr, 2381 MultiTypeArg ArgTypes, 2382 MultiExprArg ArgExprs); 2383 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2384 SourceLocation DefaultLoc, 2385 SourceLocation RParenLoc, 2386 Expr *ControllingExpr, 2387 TypeSourceInfo **Types, 2388 Expr **Exprs, 2389 unsigned NumAssocs); 2390 2391 // Binary/Unary Operators. 'Tok' is the token for the operator. 2392 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2393 Expr *InputExpr); 2394 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2395 UnaryOperatorKind Opc, Expr *Input); 2396 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2397 tok::TokenKind Op, Expr *Input); 2398 2399 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo, 2400 SourceLocation OpLoc, 2401 UnaryExprOrTypeTrait ExprKind, 2402 SourceRange R); 2403 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2404 UnaryExprOrTypeTrait ExprKind); 2405 ExprResult 2406 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2407 UnaryExprOrTypeTrait ExprKind, 2408 bool IsType, void *TyOrEx, 2409 const SourceRange &ArgRange); 2410 2411 ExprResult CheckPlaceholderExpr(Expr *E); 2412 bool CheckVecStepExpr(Expr *E); 2413 2414 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2415 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc, 2416 SourceRange ExprRange, 2417 UnaryExprOrTypeTrait ExprKind); 2418 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2419 SourceLocation OpLoc, 2420 IdentifierInfo &Name, 2421 SourceLocation NameLoc, 2422 SourceLocation RParenLoc); 2423 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2424 tok::TokenKind Kind, Expr *Input); 2425 2426 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2427 Expr *Idx, SourceLocation RLoc); 2428 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2429 Expr *Idx, SourceLocation RLoc); 2430 2431 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2432 SourceLocation OpLoc, bool IsArrow, 2433 CXXScopeSpec &SS, 2434 SourceLocation TemplateKWLoc, 2435 NamedDecl *FirstQualifierInScope, 2436 const DeclarationNameInfo &NameInfo, 2437 const TemplateArgumentListInfo *TemplateArgs); 2438 2439 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2440 SourceLocation OpLoc, bool IsArrow, 2441 const CXXScopeSpec &SS, 2442 SourceLocation TemplateKWLoc, 2443 NamedDecl *FirstQualifierInScope, 2444 LookupResult &R, 2445 const TemplateArgumentListInfo *TemplateArgs, 2446 bool SuppressQualifierCheck = false); 2447 2448 ExprResult PerformMemberExprBaseConversion(Expr *Base, bool IsArrow); 2449 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2450 bool &IsArrow, SourceLocation OpLoc, 2451 CXXScopeSpec &SS, 2452 Decl *ObjCImpDecl, 2453 bool HasTemplateArgs); 2454 2455 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2456 const CXXScopeSpec &SS, 2457 const LookupResult &R); 2458 2459 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2460 bool IsArrow, SourceLocation OpLoc, 2461 const CXXScopeSpec &SS, 2462 SourceLocation TemplateKWLoc, 2463 NamedDecl *FirstQualifierInScope, 2464 const DeclarationNameInfo &NameInfo, 2465 const TemplateArgumentListInfo *TemplateArgs); 2466 2467 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2468 SourceLocation OpLoc, 2469 tok::TokenKind OpKind, 2470 CXXScopeSpec &SS, 2471 SourceLocation TemplateKWLoc, 2472 UnqualifiedId &Member, 2473 Decl *ObjCImpDecl, 2474 bool HasTrailingLParen); 2475 2476 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2477 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2478 FunctionDecl *FDecl, 2479 const FunctionProtoType *Proto, 2480 Expr **Args, unsigned NumArgs, 2481 SourceLocation RParenLoc, 2482 bool ExecConfig = false); 2483 void CheckStaticArrayArgument(SourceLocation CallLoc, 2484 ParmVarDecl *Param, 2485 const Expr *ArgExpr); 2486 2487 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2488 /// This provides the location of the left/right parens and a list of comma 2489 /// locations. 2490 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2491 MultiExprArg ArgExprs, SourceLocation RParenLoc, 2492 Expr *ExecConfig = 0, bool IsExecConfig = false); 2493 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2494 SourceLocation LParenLoc, 2495 Expr **Args, unsigned NumArgs, 2496 SourceLocation RParenLoc, 2497 Expr *Config = 0, 2498 bool IsExecConfig = false); 2499 2500 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2501 MultiExprArg ExecConfig, 2502 SourceLocation GGGLoc); 2503 2504 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2505 Declarator &D, ParsedType &Ty, 2506 SourceLocation RParenLoc, Expr *CastExpr); 2507 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2508 TypeSourceInfo *Ty, 2509 SourceLocation RParenLoc, 2510 Expr *Op); 2511 CastKind PrepareScalarCast(ExprResult &src, QualType destType); 2512 2513 /// \brief Build an altivec or OpenCL literal. 2514 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2515 SourceLocation RParenLoc, Expr *E, 2516 TypeSourceInfo *TInfo); 2517 2518 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2519 2520 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2521 ParsedType Ty, 2522 SourceLocation RParenLoc, 2523 Expr *InitExpr); 2524 2525 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2526 TypeSourceInfo *TInfo, 2527 SourceLocation RParenLoc, 2528 Expr *LiteralExpr); 2529 2530 ExprResult ActOnInitList(SourceLocation LBraceLoc, 2531 MultiExprArg InitArgList, 2532 SourceLocation RBraceLoc); 2533 2534 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2535 SourceLocation Loc, 2536 bool GNUSyntax, 2537 ExprResult Init); 2538 2539 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2540 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr); 2541 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2542 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr); 2543 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc, 2544 Expr *LHSExpr, Expr *RHSExpr); 2545 2546 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2547 /// in the case of a the GNU conditional expr extension. 2548 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2549 SourceLocation ColonLoc, 2550 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr); 2551 2552 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2553 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2554 LabelDecl *TheDecl); 2555 2556 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2557 SourceLocation RPLoc); // "({..})" 2558 2559 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2560 struct OffsetOfComponent { 2561 SourceLocation LocStart, LocEnd; 2562 bool isBrackets; // true if [expr], false if .ident 2563 union { 2564 IdentifierInfo *IdentInfo; 2565 Expr *E; 2566 } U; 2567 }; 2568 2569 /// __builtin_offsetof(type, a.b[123][456].c) 2570 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2571 TypeSourceInfo *TInfo, 2572 OffsetOfComponent *CompPtr, 2573 unsigned NumComponents, 2574 SourceLocation RParenLoc); 2575 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2576 SourceLocation BuiltinLoc, 2577 SourceLocation TypeLoc, 2578 ParsedType ParsedArgTy, 2579 OffsetOfComponent *CompPtr, 2580 unsigned NumComponents, 2581 SourceLocation RParenLoc); 2582 2583 // __builtin_choose_expr(constExpr, expr1, expr2) 2584 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2585 Expr *CondExpr, Expr *LHSExpr, 2586 Expr *RHSExpr, SourceLocation RPLoc); 2587 2588 // __builtin_va_arg(expr, type) 2589 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, 2590 SourceLocation RPLoc); 2591 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E, 2592 TypeSourceInfo *TInfo, SourceLocation RPLoc); 2593 2594 // __null 2595 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2596 2597 bool CheckCaseExpression(Expr *E); 2598 2599 /// \brief Describes the result of an "if-exists" condition check. 2600 enum IfExistsResult { 2601 /// \brief The symbol exists. 2602 IER_Exists, 2603 2604 /// \brief The symbol does not exist. 2605 IER_DoesNotExist, 2606 2607 /// \brief The name is a dependent name, so the results will differ 2608 /// from one instantiation to the next. 2609 IER_Dependent, 2610 2611 /// \brief An error occurred. 2612 IER_Error 2613 }; 2614 2615 IfExistsResult 2616 CheckMicrosoftIfExistsSymbol(Scope *S, CXXScopeSpec &SS, 2617 const DeclarationNameInfo &TargetNameInfo); 2618 2619 IfExistsResult 2620 CheckMicrosoftIfExistsSymbol(Scope *S, SourceLocation KeywordLoc, 2621 bool IsIfExists, CXXScopeSpec &SS, 2622 UnqualifiedId &Name); 2623 2624 StmtResult BuildMSDependentExistsStmt(SourceLocation KeywordLoc, 2625 bool IsIfExists, 2626 NestedNameSpecifierLoc QualifierLoc, 2627 DeclarationNameInfo NameInfo, 2628 Stmt *Nested); 2629 StmtResult ActOnMSDependentExistsStmt(SourceLocation KeywordLoc, 2630 bool IsIfExists, 2631 CXXScopeSpec &SS, UnqualifiedId &Name, 2632 Stmt *Nested); 2633 2634 //===------------------------- "Block" Extension ------------------------===// 2635 2636 /// ActOnBlockStart - This callback is invoked when a block literal is 2637 /// started. 2638 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2639 2640 /// ActOnBlockArguments - This callback allows processing of block arguments. 2641 /// If there are no arguments, this is still invoked. 2642 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2643 2644 /// ActOnBlockError - If there is an error parsing a block, this callback 2645 /// is invoked to pop the information about the block from the action impl. 2646 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2647 2648 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2649 /// literal was successfully completed. ^(int x){...} 2650 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body, 2651 Scope *CurScope); 2652 2653 //===---------------------------- OpenCL Features -----------------------===// 2654 2655 /// __builtin_astype(...) 2656 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, 2657 SourceLocation BuiltinLoc, 2658 SourceLocation RParenLoc); 2659 2660 //===---------------------------- C++ Features --------------------------===// 2661 2662 // Act on C++ namespaces 2663 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2664 SourceLocation NamespaceLoc, 2665 SourceLocation IdentLoc, 2666 IdentifierInfo *Ident, 2667 SourceLocation LBrace, 2668 AttributeList *AttrList); 2669 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2670 2671 NamespaceDecl *getStdNamespace() const; 2672 NamespaceDecl *getOrCreateStdNamespace(); 2673 2674 CXXRecordDecl *getStdBadAlloc() const; 2675 2676 /// \brief Tests whether Ty is an instance of std::initializer_list and, if 2677 /// it is and Element is not NULL, assigns the element type to Element. 2678 bool isStdInitializerList(QualType Ty, QualType *Element); 2679 2680 /// \brief Looks for the std::initializer_list template and instantiates it 2681 /// with Element, or emits an error if it's not found. 2682 /// 2683 /// \returns The instantiated template, or null on error. 2684 QualType BuildStdInitializerList(QualType Element, SourceLocation Loc); 2685 2686 /// \brief Determine whether Ctor is an initializer-list constructor, as 2687 /// defined in [dcl.init.list]p2. 2688 bool isInitListConstructor(const CXXConstructorDecl *Ctor); 2689 2690 Decl *ActOnUsingDirective(Scope *CurScope, 2691 SourceLocation UsingLoc, 2692 SourceLocation NamespcLoc, 2693 CXXScopeSpec &SS, 2694 SourceLocation IdentLoc, 2695 IdentifierInfo *NamespcName, 2696 AttributeList *AttrList); 2697 2698 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2699 2700 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2701 SourceLocation NamespaceLoc, 2702 SourceLocation AliasLoc, 2703 IdentifierInfo *Alias, 2704 CXXScopeSpec &SS, 2705 SourceLocation IdentLoc, 2706 IdentifierInfo *Ident); 2707 2708 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2709 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2710 const LookupResult &PreviousDecls); 2711 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2712 NamedDecl *Target); 2713 2714 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2715 bool isTypeName, 2716 const CXXScopeSpec &SS, 2717 SourceLocation NameLoc, 2718 const LookupResult &Previous); 2719 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2720 const CXXScopeSpec &SS, 2721 SourceLocation NameLoc); 2722 2723 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2724 SourceLocation UsingLoc, 2725 CXXScopeSpec &SS, 2726 const DeclarationNameInfo &NameInfo, 2727 AttributeList *AttrList, 2728 bool IsInstantiation, 2729 bool IsTypeName, 2730 SourceLocation TypenameLoc); 2731 2732 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2733 2734 Decl *ActOnUsingDeclaration(Scope *CurScope, 2735 AccessSpecifier AS, 2736 bool HasUsingKeyword, 2737 SourceLocation UsingLoc, 2738 CXXScopeSpec &SS, 2739 UnqualifiedId &Name, 2740 AttributeList *AttrList, 2741 bool IsTypeName, 2742 SourceLocation TypenameLoc); 2743 Decl *ActOnAliasDeclaration(Scope *CurScope, 2744 AccessSpecifier AS, 2745 MultiTemplateParamsArg TemplateParams, 2746 SourceLocation UsingLoc, 2747 UnqualifiedId &Name, 2748 TypeResult Type); 2749 2750 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2751 /// ActOnDeclarator, when a C++ direct initializer is present. 2752 /// e.g: "int x(1);" 2753 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2754 SourceLocation LParenLoc, 2755 MultiExprArg Exprs, 2756 SourceLocation RParenLoc, 2757 bool TypeMayContainAuto); 2758 2759 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2760 /// and sets it as the initializer for the the passed in VarDecl. 2761 bool InitializeVarWithConstructor(VarDecl *VD, 2762 CXXConstructorDecl *Constructor, 2763 MultiExprArg Exprs, 2764 bool HadMultipleCandidates); 2765 2766 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2767 /// including handling of its default argument expressions. 2768 /// 2769 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2770 ExprResult 2771 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2772 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2773 bool HadMultipleCandidates, bool RequiresZeroInit, 2774 unsigned ConstructKind, SourceRange ParenRange); 2775 2776 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2777 // the constructor can be elidable? 2778 ExprResult 2779 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2780 CXXConstructorDecl *Constructor, bool Elidable, 2781 MultiExprArg Exprs, bool HadMultipleCandidates, 2782 bool RequiresZeroInit, unsigned ConstructKind, 2783 SourceRange ParenRange); 2784 2785 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2786 /// the default expr if needed. 2787 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2788 FunctionDecl *FD, 2789 ParmVarDecl *Param); 2790 2791 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2792 /// constructed variable. 2793 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2794 2795 /// \brief Helper class that collects exception specifications for 2796 /// implicitly-declared special member functions. 2797 class ImplicitExceptionSpecification { 2798 // Pointer to allow copying 2799 ASTContext *Context; 2800 // We order exception specifications thus: 2801 // noexcept is the most restrictive, but is only used in C++0x. 2802 // throw() comes next. 2803 // Then a throw(collected exceptions) 2804 // Finally no specification. 2805 // throw(...) is used instead if any called function uses it. 2806 // 2807 // If this exception specification cannot be known yet (for instance, 2808 // because this is the exception specification for a defaulted default 2809 // constructor and we haven't finished parsing the deferred parts of the 2810 // class yet), the C++0x standard does not specify how to behave. We 2811 // record this as an 'unknown' exception specification, which overrules 2812 // any other specification (even 'none', to keep this rule simple). 2813 ExceptionSpecificationType ComputedEST; 2814 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2815 SmallVector<QualType, 4> Exceptions; 2816 2817 void ClearExceptions() { 2818 ExceptionsSeen.clear(); 2819 Exceptions.clear(); 2820 } 2821 2822 public: 2823 explicit ImplicitExceptionSpecification(ASTContext &Context) 2824 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2825 if (!Context.getLangOptions().CPlusPlus0x) 2826 ComputedEST = EST_DynamicNone; 2827 } 2828 2829 /// \brief Get the computed exception specification type. 2830 ExceptionSpecificationType getExceptionSpecType() const { 2831 assert(ComputedEST != EST_ComputedNoexcept && 2832 "noexcept(expr) should not be a possible result"); 2833 return ComputedEST; 2834 } 2835 2836 /// \brief The number of exceptions in the exception specification. 2837 unsigned size() const { return Exceptions.size(); } 2838 2839 /// \brief The set of exceptions in the exception specification. 2840 const QualType *data() const { return Exceptions.data(); } 2841 2842 /// \brief Integrate another called method into the collected data. 2843 void CalledDecl(CXXMethodDecl *Method); 2844 2845 /// \brief Integrate an invoked expression into the collected data. 2846 void CalledExpr(Expr *E); 2847 2848 /// \brief Specify that the exception specification can't be detemined yet. 2849 void SetDelayed() { 2850 ClearExceptions(); 2851 ComputedEST = EST_Delayed; 2852 } 2853 2854 FunctionProtoType::ExtProtoInfo getEPI() const { 2855 FunctionProtoType::ExtProtoInfo EPI; 2856 EPI.ExceptionSpecType = getExceptionSpecType(); 2857 EPI.NumExceptions = size(); 2858 EPI.Exceptions = data(); 2859 return EPI; 2860 } 2861 }; 2862 2863 /// \brief Determine what sort of exception specification a defaulted 2864 /// copy constructor of a class will have. 2865 ImplicitExceptionSpecification 2866 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2867 2868 /// \brief Determine what sort of exception specification a defaulted 2869 /// default constructor of a class will have, and whether the parameter 2870 /// will be const. 2871 std::pair<ImplicitExceptionSpecification, bool> 2872 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2873 2874 /// \brief Determine what sort of exception specification a defautled 2875 /// copy assignment operator of a class will have, and whether the 2876 /// parameter will be const. 2877 std::pair<ImplicitExceptionSpecification, bool> 2878 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2879 2880 /// \brief Determine what sort of exception specification a defaulted move 2881 /// constructor of a class will have. 2882 ImplicitExceptionSpecification 2883 ComputeDefaultedMoveCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2884 2885 /// \brief Determine what sort of exception specification a defaulted move 2886 /// assignment operator of a class will have. 2887 ImplicitExceptionSpecification 2888 ComputeDefaultedMoveAssignmentExceptionSpec(CXXRecordDecl *ClassDecl); 2889 2890 /// \brief Determine what sort of exception specification a defaulted 2891 /// destructor of a class will have. 2892 ImplicitExceptionSpecification 2893 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 2894 2895 /// \brief Determine if a special member function should have a deleted 2896 /// definition when it is defaulted. 2897 bool ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM); 2898 2899 /// \brief Determine if a defaulted copy assignment operator ought to be 2900 /// deleted. 2901 bool ShouldDeleteCopyAssignmentOperator(CXXMethodDecl *MD); 2902 2903 /// \brief Determine if a defaulted move assignment operator ought to be 2904 /// deleted. 2905 bool ShouldDeleteMoveAssignmentOperator(CXXMethodDecl *MD); 2906 2907 /// \brief Determine if a defaulted destructor ought to be deleted. 2908 bool ShouldDeleteDestructor(CXXDestructorDecl *DD); 2909 2910 /// \brief Declare the implicit default constructor for the given class. 2911 /// 2912 /// \param ClassDecl The class declaration into which the implicit 2913 /// default constructor will be added. 2914 /// 2915 /// \returns The implicitly-declared default constructor. 2916 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2917 CXXRecordDecl *ClassDecl); 2918 2919 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2920 /// defining this constructor as the default constructor. 2921 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2922 CXXConstructorDecl *Constructor); 2923 2924 /// \brief Declare the implicit destructor for the given class. 2925 /// 2926 /// \param ClassDecl The class declaration into which the implicit 2927 /// destructor will be added. 2928 /// 2929 /// \returns The implicitly-declared destructor. 2930 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2931 2932 /// DefineImplicitDestructor - Checks for feasibility of 2933 /// defining this destructor as the default destructor. 2934 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2935 CXXDestructorDecl *Destructor); 2936 2937 /// \brief Build an exception spec for destructors that don't have one. 2938 /// 2939 /// C++11 says that user-defined destructors with no exception spec get one 2940 /// that looks as if the destructor was implicitly declared. 2941 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 2942 CXXDestructorDecl *Destructor); 2943 2944 /// \brief Declare all inherited constructors for the given class. 2945 /// 2946 /// \param ClassDecl The class declaration into which the inherited 2947 /// constructors will be added. 2948 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2949 2950 /// \brief Declare the implicit copy constructor for the given class. 2951 /// 2952 /// \param ClassDecl The class declaration into which the implicit 2953 /// copy constructor will be added. 2954 /// 2955 /// \returns The implicitly-declared copy constructor. 2956 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2957 2958 /// DefineImplicitCopyConstructor - Checks for feasibility of 2959 /// defining this constructor as the copy constructor. 2960 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2961 CXXConstructorDecl *Constructor); 2962 2963 /// \brief Declare the implicit move constructor for the given class. 2964 /// 2965 /// \param ClassDecl The Class declaration into which the implicit 2966 /// move constructor will be added. 2967 /// 2968 /// \returns The implicitly-declared move constructor, or NULL if it wasn't 2969 /// declared. 2970 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl); 2971 2972 /// DefineImplicitMoveConstructor - Checks for feasibility of 2973 /// defining this constructor as the move constructor. 2974 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation, 2975 CXXConstructorDecl *Constructor); 2976 2977 /// \brief Declare the implicit copy assignment operator for the given class. 2978 /// 2979 /// \param ClassDecl The class declaration into which the implicit 2980 /// copy assignment operator will be added. 2981 /// 2982 /// \returns The implicitly-declared copy assignment operator. 2983 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2984 2985 /// \brief Defines an implicitly-declared copy assignment operator. 2986 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2987 CXXMethodDecl *MethodDecl); 2988 2989 /// \brief Declare the implicit move assignment operator for the given class. 2990 /// 2991 /// \param ClassDecl The Class declaration into which the implicit 2992 /// move assignment operator will be added. 2993 /// 2994 /// \returns The implicitly-declared move assignment operator, or NULL if it 2995 /// wasn't declared. 2996 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl); 2997 2998 /// \brief Defines an implicitly-declared move assignment operator. 2999 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation, 3000 CXXMethodDecl *MethodDecl); 3001 3002 /// \brief Force the declaration of any implicitly-declared members of this 3003 /// class. 3004 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 3005 3006 /// MaybeBindToTemporary - If the passed in expression has a record type with 3007 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 3008 /// it simply returns the passed in expression. 3009 ExprResult MaybeBindToTemporary(Expr *E); 3010 3011 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 3012 MultiExprArg ArgsPtr, 3013 SourceLocation Loc, 3014 ASTOwningVector<Expr*> &ConvertedArgs); 3015 3016 ParsedType getDestructorName(SourceLocation TildeLoc, 3017 IdentifierInfo &II, SourceLocation NameLoc, 3018 Scope *S, CXXScopeSpec &SS, 3019 ParsedType ObjectType, 3020 bool EnteringContext); 3021 3022 ParsedType getDestructorType(const DeclSpec& DS, ParsedType ObjectType); 3023 3024 // Checks that reinterpret casts don't have undefined behavior. 3025 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 3026 bool IsDereference, SourceRange Range); 3027 3028 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 3029 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 3030 tok::TokenKind Kind, 3031 SourceLocation LAngleBracketLoc, 3032 Declarator &D, 3033 SourceLocation RAngleBracketLoc, 3034 SourceLocation LParenLoc, 3035 Expr *E, 3036 SourceLocation RParenLoc); 3037 3038 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 3039 tok::TokenKind Kind, 3040 TypeSourceInfo *Ty, 3041 Expr *E, 3042 SourceRange AngleBrackets, 3043 SourceRange Parens); 3044 3045 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3046 SourceLocation TypeidLoc, 3047 TypeSourceInfo *Operand, 3048 SourceLocation RParenLoc); 3049 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3050 SourceLocation TypeidLoc, 3051 Expr *Operand, 3052 SourceLocation RParenLoc); 3053 3054 /// ActOnCXXTypeid - Parse typeid( something ). 3055 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 3056 SourceLocation LParenLoc, bool isType, 3057 void *TyOrExpr, 3058 SourceLocation RParenLoc); 3059 3060 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3061 SourceLocation TypeidLoc, 3062 TypeSourceInfo *Operand, 3063 SourceLocation RParenLoc); 3064 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3065 SourceLocation TypeidLoc, 3066 Expr *Operand, 3067 SourceLocation RParenLoc); 3068 3069 /// ActOnCXXUuidof - Parse __uuidof( something ). 3070 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 3071 SourceLocation LParenLoc, bool isType, 3072 void *TyOrExpr, 3073 SourceLocation RParenLoc); 3074 3075 3076 //// ActOnCXXThis - Parse 'this' pointer. 3077 ExprResult ActOnCXXThis(SourceLocation loc); 3078 3079 /// \brief Try to retrieve the type of the 'this' pointer. 3080 /// 3081 /// \param Capture If true, capture 'this' in this context. 3082 /// 3083 /// \returns The type of 'this', if possible. Otherwise, returns a NULL type. 3084 QualType getCurrentThisType(); 3085 3086 /// \brief Make sure the value of 'this' is actually available in the current 3087 /// context, if it is a potentially evaluated context. 3088 void CheckCXXThisCapture(SourceLocation Loc); 3089 3090 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 3091 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 3092 3093 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 3094 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 3095 3096 //// ActOnCXXThrow - Parse throw expressions. 3097 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 3098 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 3099 bool IsThrownVarInScope); 3100 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 3101 bool IsThrownVarInScope); 3102 3103 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 3104 /// Can be interpreted either as function-style casting ("int(x)") 3105 /// or class type construction ("ClassType(x,y,z)") 3106 /// or creation of a value-initialized type ("int()"). 3107 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 3108 SourceLocation LParenLoc, 3109 MultiExprArg Exprs, 3110 SourceLocation RParenLoc); 3111 3112 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 3113 SourceLocation LParenLoc, 3114 MultiExprArg Exprs, 3115 SourceLocation RParenLoc); 3116 3117 /// ActOnCXXNew - Parsed a C++ 'new' expression. 3118 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 3119 SourceLocation PlacementLParen, 3120 MultiExprArg PlacementArgs, 3121 SourceLocation PlacementRParen, 3122 SourceRange TypeIdParens, Declarator &D, 3123 SourceLocation ConstructorLParen, 3124 MultiExprArg ConstructorArgs, 3125 SourceLocation ConstructorRParen); 3126 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 3127 SourceLocation PlacementLParen, 3128 MultiExprArg PlacementArgs, 3129 SourceLocation PlacementRParen, 3130 SourceRange TypeIdParens, 3131 QualType AllocType, 3132 TypeSourceInfo *AllocTypeInfo, 3133 Expr *ArraySize, 3134 SourceLocation ConstructorLParen, 3135 MultiExprArg ConstructorArgs, 3136 SourceLocation ConstructorRParen, 3137 bool TypeMayContainAuto = true); 3138 3139 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 3140 SourceRange R); 3141 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 3142 bool UseGlobal, QualType AllocType, bool IsArray, 3143 Expr **PlaceArgs, unsigned NumPlaceArgs, 3144 FunctionDecl *&OperatorNew, 3145 FunctionDecl *&OperatorDelete); 3146 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 3147 DeclarationName Name, Expr** Args, 3148 unsigned NumArgs, DeclContext *Ctx, 3149 bool AllowMissing, FunctionDecl *&Operator, 3150 bool Diagnose = true); 3151 void DeclareGlobalNewDelete(); 3152 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 3153 QualType Argument, 3154 bool addMallocAttr = false); 3155 3156 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 3157 DeclarationName Name, FunctionDecl* &Operator, 3158 bool Diagnose = true); 3159 3160 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 3161 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 3162 bool UseGlobal, bool ArrayForm, 3163 Expr *Operand); 3164 3165 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 3166 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 3167 SourceLocation StmtLoc, 3168 bool ConvertToBoolean); 3169 3170 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 3171 Expr *Operand, SourceLocation RParen); 3172 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 3173 SourceLocation RParen); 3174 3175 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 3176 /// pseudo-functions. 3177 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 3178 SourceLocation KWLoc, 3179 ParsedType Ty, 3180 SourceLocation RParen); 3181 3182 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3183 SourceLocation KWLoc, 3184 TypeSourceInfo *T, 3185 SourceLocation RParen); 3186 3187 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3188 /// pseudo-functions. 3189 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3190 SourceLocation KWLoc, 3191 ParsedType LhsTy, 3192 ParsedType RhsTy, 3193 SourceLocation RParen); 3194 3195 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3196 SourceLocation KWLoc, 3197 TypeSourceInfo *LhsT, 3198 TypeSourceInfo *RhsT, 3199 SourceLocation RParen); 3200 3201 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3202 /// pseudo-functions. 3203 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3204 SourceLocation KWLoc, 3205 ParsedType LhsTy, 3206 Expr *DimExpr, 3207 SourceLocation RParen); 3208 3209 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3210 SourceLocation KWLoc, 3211 TypeSourceInfo *TSInfo, 3212 Expr *DimExpr, 3213 SourceLocation RParen); 3214 3215 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3216 /// pseudo-functions. 3217 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3218 SourceLocation KWLoc, 3219 Expr *Queried, 3220 SourceLocation RParen); 3221 3222 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3223 SourceLocation KWLoc, 3224 Expr *Queried, 3225 SourceLocation RParen); 3226 3227 ExprResult ActOnStartCXXMemberReference(Scope *S, 3228 Expr *Base, 3229 SourceLocation OpLoc, 3230 tok::TokenKind OpKind, 3231 ParsedType &ObjectType, 3232 bool &MayBePseudoDestructor); 3233 3234 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3235 3236 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3237 SourceLocation OpLoc, 3238 tok::TokenKind OpKind, 3239 const CXXScopeSpec &SS, 3240 TypeSourceInfo *ScopeType, 3241 SourceLocation CCLoc, 3242 SourceLocation TildeLoc, 3243 PseudoDestructorTypeStorage DestroyedType, 3244 bool HasTrailingLParen); 3245 3246 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3247 SourceLocation OpLoc, 3248 tok::TokenKind OpKind, 3249 CXXScopeSpec &SS, 3250 UnqualifiedId &FirstTypeName, 3251 SourceLocation CCLoc, 3252 SourceLocation TildeLoc, 3253 UnqualifiedId &SecondTypeName, 3254 bool HasTrailingLParen); 3255 3256 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3257 SourceLocation OpLoc, 3258 tok::TokenKind OpKind, 3259 SourceLocation TildeLoc, 3260 const DeclSpec& DS, 3261 bool HasTrailingLParen); 3262 3263 /// MaybeCreateExprWithCleanups - If the current full-expression 3264 /// requires any cleanups, surround it with a ExprWithCleanups node. 3265 /// Otherwise, just returns the passed-in expression. 3266 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3267 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3268 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3269 3270 ExprResult ActOnFinishFullExpr(Expr *Expr); 3271 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3272 3273 // Marks SS invalid if it represents an incomplete type. 3274 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3275 3276 DeclContext *computeDeclContext(QualType T); 3277 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3278 bool EnteringContext = false); 3279 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3280 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3281 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3282 3283 /// \brief The parser has parsed a global nested-name-specifier '::'. 3284 /// 3285 /// \param S The scope in which this nested-name-specifier occurs. 3286 /// 3287 /// \param CCLoc The location of the '::'. 3288 /// 3289 /// \param SS The nested-name-specifier, which will be updated in-place 3290 /// to reflect the parsed nested-name-specifier. 3291 /// 3292 /// \returns true if an error occurred, false otherwise. 3293 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3294 CXXScopeSpec &SS); 3295 3296 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3297 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3298 3299 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3300 SourceLocation IdLoc, 3301 IdentifierInfo &II, 3302 ParsedType ObjectType); 3303 3304 bool BuildCXXNestedNameSpecifier(Scope *S, 3305 IdentifierInfo &Identifier, 3306 SourceLocation IdentifierLoc, 3307 SourceLocation CCLoc, 3308 QualType ObjectType, 3309 bool EnteringContext, 3310 CXXScopeSpec &SS, 3311 NamedDecl *ScopeLookupResult, 3312 bool ErrorRecoveryLookup); 3313 3314 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3315 /// 3316 /// \param S The scope in which this nested-name-specifier occurs. 3317 /// 3318 /// \param Identifier The identifier preceding the '::'. 3319 /// 3320 /// \param IdentifierLoc The location of the identifier. 3321 /// 3322 /// \param CCLoc The location of the '::'. 3323 /// 3324 /// \param ObjectType The type of the object, if we're parsing 3325 /// nested-name-specifier in a member access expression. 3326 /// 3327 /// \param EnteringContext Whether we're entering the context nominated by 3328 /// this nested-name-specifier. 3329 /// 3330 /// \param SS The nested-name-specifier, which is both an input 3331 /// parameter (the nested-name-specifier before this type) and an 3332 /// output parameter (containing the full nested-name-specifier, 3333 /// including this new type). 3334 /// 3335 /// \returns true if an error occurred, false otherwise. 3336 bool ActOnCXXNestedNameSpecifier(Scope *S, 3337 IdentifierInfo &Identifier, 3338 SourceLocation IdentifierLoc, 3339 SourceLocation CCLoc, 3340 ParsedType ObjectType, 3341 bool EnteringContext, 3342 CXXScopeSpec &SS); 3343 3344 bool ActOnCXXNestedNameSpecifierDecltype(CXXScopeSpec &SS, 3345 const DeclSpec &DS, 3346 SourceLocation ColonColonLoc); 3347 3348 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3349 IdentifierInfo &Identifier, 3350 SourceLocation IdentifierLoc, 3351 SourceLocation ColonLoc, 3352 ParsedType ObjectType, 3353 bool EnteringContext); 3354 3355 /// \brief The parser has parsed a nested-name-specifier 3356 /// 'template[opt] template-name < template-args >::'. 3357 /// 3358 /// \param S The scope in which this nested-name-specifier occurs. 3359 /// 3360 /// \param SS The nested-name-specifier, which is both an input 3361 /// parameter (the nested-name-specifier before this type) and an 3362 /// output parameter (containing the full nested-name-specifier, 3363 /// including this new type). 3364 /// 3365 /// \param TemplateKWLoc the location of the 'template' keyword, if any. 3366 /// \param TemplateName The template name. 3367 /// \param TemplateNameLoc The location of the template name. 3368 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3369 /// \param TemplateArgs The template arguments. 3370 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3371 /// \param CCLoc The location of the '::'. 3372 /// 3373 /// \param EnteringContext Whether we're entering the context of the 3374 /// nested-name-specifier. 3375 /// 3376 /// 3377 /// \returns true if an error occurred, false otherwise. 3378 bool ActOnCXXNestedNameSpecifier(Scope *S, 3379 CXXScopeSpec &SS, 3380 SourceLocation TemplateKWLoc, 3381 TemplateTy Template, 3382 SourceLocation TemplateNameLoc, 3383 SourceLocation LAngleLoc, 3384 ASTTemplateArgsPtr TemplateArgs, 3385 SourceLocation RAngleLoc, 3386 SourceLocation CCLoc, 3387 bool EnteringContext); 3388 3389 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3390 /// that the parser can use later to reconstruct the given 3391 /// nested-name-specifier. 3392 /// 3393 /// \param SS A nested-name-specifier. 3394 /// 3395 /// \returns A pointer containing all of the information in the 3396 /// nested-name-specifier \p SS. 3397 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3398 3399 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3400 /// the nested-name-specifier structure. 3401 /// 3402 /// \param Annotation The annotation pointer, produced by 3403 /// \c SaveNestedNameSpecifierAnnotation(). 3404 /// 3405 /// \param AnnotationRange The source range corresponding to the annotation. 3406 /// 3407 /// \param SS The nested-name-specifier that will be updated with the contents 3408 /// of the annotation pointer. 3409 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3410 SourceRange AnnotationRange, 3411 CXXScopeSpec &SS); 3412 3413 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3414 3415 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3416 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3417 /// After this method is called, according to [C++ 3.4.3p3], names should be 3418 /// looked up in the declarator-id's scope, until the declarator is parsed and 3419 /// ActOnCXXExitDeclaratorScope is called. 3420 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3421 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3422 3423 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3424 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3425 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3426 /// Used to indicate that names should revert to being looked up in the 3427 /// defining scope. 3428 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3429 3430 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3431 /// initializer for the declaration 'Dcl'. 3432 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3433 /// static data member of class X, names should be looked up in the scope of 3434 /// class X. 3435 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3436 3437 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3438 /// initializer for the declaration 'Dcl'. 3439 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3440 3441 /// ActOnStartOfLambdaDefinition - This is called just before we start 3442 /// parsing the body of a lambda; it analyzes the explicit captures and 3443 /// arguments, and sets up various data-structures for the body of the 3444 /// lambda. 3445 void ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro, 3446 Declarator &ParamInfo, Scope *CurScope); 3447 3448 /// ActOnLambdaError - If there is an error parsing a lambda, this callback 3449 /// is invoked to pop the information about the lambda. 3450 void ActOnLambdaError(SourceLocation StartLoc, Scope *CurScope); 3451 3452 /// ActOnLambdaExpr - This is called when the body of a lambda expression 3453 /// was successfully completed. 3454 ExprResult ActOnLambdaExpr(SourceLocation StartLoc, Stmt *Body, 3455 Scope *CurScope); 3456 3457 // ParseObjCStringLiteral - Parse Objective-C string literals. 3458 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3459 Expr **Strings, 3460 unsigned NumStrings); 3461 3462 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3463 TypeSourceInfo *EncodedTypeInfo, 3464 SourceLocation RParenLoc); 3465 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3466 CXXMethodDecl *Method, 3467 bool HadMultipleCandidates); 3468 3469 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3470 SourceLocation EncodeLoc, 3471 SourceLocation LParenLoc, 3472 ParsedType Ty, 3473 SourceLocation RParenLoc); 3474 3475 // ParseObjCSelectorExpression - Build selector expression for @selector 3476 ExprResult ParseObjCSelectorExpression(Selector Sel, 3477 SourceLocation AtLoc, 3478 SourceLocation SelLoc, 3479 SourceLocation LParenLoc, 3480 SourceLocation RParenLoc); 3481 3482 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3483 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3484 SourceLocation AtLoc, 3485 SourceLocation ProtoLoc, 3486 SourceLocation LParenLoc, 3487 SourceLocation RParenLoc); 3488 3489 //===--------------------------------------------------------------------===// 3490 // C++ Declarations 3491 // 3492 Decl *ActOnStartLinkageSpecification(Scope *S, 3493 SourceLocation ExternLoc, 3494 SourceLocation LangLoc, 3495 StringRef Lang, 3496 SourceLocation LBraceLoc); 3497 Decl *ActOnFinishLinkageSpecification(Scope *S, 3498 Decl *LinkageSpec, 3499 SourceLocation RBraceLoc); 3500 3501 3502 //===--------------------------------------------------------------------===// 3503 // C++ Classes 3504 // 3505 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3506 const CXXScopeSpec *SS = 0); 3507 3508 bool ActOnAccessSpecifier(AccessSpecifier Access, 3509 SourceLocation ASLoc, 3510 SourceLocation ColonLoc, 3511 AttributeList *Attrs = 0); 3512 3513 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3514 Declarator &D, 3515 MultiTemplateParamsArg TemplateParameterLists, 3516 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3517 bool HasDeferredInit); 3518 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3519 Expr *Init); 3520 3521 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3522 Scope *S, 3523 CXXScopeSpec &SS, 3524 IdentifierInfo *MemberOrBase, 3525 ParsedType TemplateTypeTy, 3526 const DeclSpec &DS, 3527 SourceLocation IdLoc, 3528 SourceLocation LParenLoc, 3529 Expr **Args, unsigned NumArgs, 3530 SourceLocation RParenLoc, 3531 SourceLocation EllipsisLoc); 3532 3533 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3534 Scope *S, 3535 CXXScopeSpec &SS, 3536 IdentifierInfo *MemberOrBase, 3537 ParsedType TemplateTypeTy, 3538 const DeclSpec &DS, 3539 SourceLocation IdLoc, 3540 Expr *InitList, 3541 SourceLocation EllipsisLoc); 3542 3543 MemInitResult BuildMemInitializer(Decl *ConstructorD, 3544 Scope *S, 3545 CXXScopeSpec &SS, 3546 IdentifierInfo *MemberOrBase, 3547 ParsedType TemplateTypeTy, 3548 const DeclSpec &DS, 3549 SourceLocation IdLoc, 3550 const MultiInitializer &Init, 3551 SourceLocation EllipsisLoc); 3552 3553 MemInitResult BuildMemberInitializer(ValueDecl *Member, 3554 const MultiInitializer &Args, 3555 SourceLocation IdLoc); 3556 3557 MemInitResult BuildBaseInitializer(QualType BaseType, 3558 TypeSourceInfo *BaseTInfo, 3559 const MultiInitializer &Args, 3560 CXXRecordDecl *ClassDecl, 3561 SourceLocation EllipsisLoc); 3562 3563 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3564 const MultiInitializer &Args, 3565 CXXRecordDecl *ClassDecl); 3566 3567 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3568 CXXCtorInitializer *Initializer); 3569 3570 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3571 CXXCtorInitializer **Initializers, 3572 unsigned NumInitializers, bool AnyErrors); 3573 3574 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3575 3576 3577 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3578 /// mark all the non-trivial destructors of its members and bases as 3579 /// referenced. 3580 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3581 CXXRecordDecl *Record); 3582 3583 /// \brief The list of classes whose vtables have been used within 3584 /// this translation unit, and the source locations at which the 3585 /// first use occurred. 3586 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3587 3588 /// \brief The list of vtables that are required but have not yet been 3589 /// materialized. 3590 SmallVector<VTableUse, 16> VTableUses; 3591 3592 /// \brief The set of classes whose vtables have been used within 3593 /// this translation unit, and a bit that will be true if the vtable is 3594 /// required to be emitted (otherwise, it should be emitted only if needed 3595 /// by code generation). 3596 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3597 3598 /// \brief Load any externally-stored vtable uses. 3599 void LoadExternalVTableUses(); 3600 3601 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 3602 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 3603 DynamicClassesType; 3604 3605 /// \brief A list of all of the dynamic classes in this translation 3606 /// unit. 3607 DynamicClassesType DynamicClasses; 3608 3609 /// \brief Note that the vtable for the given class was used at the 3610 /// given location. 3611 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3612 bool DefinitionRequired = false); 3613 3614 /// MarkVirtualMembersReferenced - Will mark all members of the given 3615 /// CXXRecordDecl referenced. 3616 void MarkVirtualMembersReferenced(SourceLocation Loc, 3617 const CXXRecordDecl *RD); 3618 3619 /// \brief Define all of the vtables that have been used in this 3620 /// translation unit and reference any virtual members used by those 3621 /// vtables. 3622 /// 3623 /// \returns true if any work was done, false otherwise. 3624 bool DefineUsedVTables(); 3625 3626 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3627 3628 void ActOnMemInitializers(Decl *ConstructorDecl, 3629 SourceLocation ColonLoc, 3630 CXXCtorInitializer **MemInits, 3631 unsigned NumMemInits, 3632 bool AnyErrors); 3633 3634 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3635 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3636 Decl *TagDecl, 3637 SourceLocation LBrac, 3638 SourceLocation RBrac, 3639 AttributeList *AttrList); 3640 3641 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3642 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3643 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3644 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3645 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3646 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3647 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3648 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3649 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3650 bool IsInsideALocalClassWithinATemplateFunction(); 3651 3652 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3653 Expr *AssertExpr, 3654 Expr *AssertMessageExpr, 3655 SourceLocation RParenLoc); 3656 3657 FriendDecl *CheckFriendTypeDecl(SourceLocation Loc, 3658 SourceLocation FriendLoc, 3659 TypeSourceInfo *TSInfo); 3660 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3661 MultiTemplateParamsArg TemplateParams); 3662 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, 3663 MultiTemplateParamsArg TemplateParams); 3664 3665 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3666 StorageClass& SC); 3667 void CheckConstructor(CXXConstructorDecl *Constructor); 3668 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3669 StorageClass& SC); 3670 bool CheckDestructor(CXXDestructorDecl *Destructor); 3671 void CheckConversionDeclarator(Declarator &D, QualType &R, 3672 StorageClass& SC); 3673 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3674 3675 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3676 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3677 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3678 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3679 void CheckExplicitlyDefaultedMoveConstructor(CXXConstructorDecl *Ctor); 3680 void CheckExplicitlyDefaultedMoveAssignment(CXXMethodDecl *Method); 3681 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3682 3683 //===--------------------------------------------------------------------===// 3684 // C++ Derived Classes 3685 // 3686 3687 /// ActOnBaseSpecifier - Parsed a base specifier 3688 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3689 SourceRange SpecifierRange, 3690 bool Virtual, AccessSpecifier Access, 3691 TypeSourceInfo *TInfo, 3692 SourceLocation EllipsisLoc); 3693 3694 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3695 SourceRange SpecifierRange, 3696 bool Virtual, AccessSpecifier Access, 3697 ParsedType basetype, 3698 SourceLocation BaseLoc, 3699 SourceLocation EllipsisLoc); 3700 3701 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3702 unsigned NumBases); 3703 void ActOnBaseSpecifiers(Decl *ClassDecl, CXXBaseSpecifier **Bases, 3704 unsigned NumBases); 3705 3706 bool IsDerivedFrom(QualType Derived, QualType Base); 3707 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3708 3709 // FIXME: I don't like this name. 3710 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3711 3712 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3713 3714 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3715 SourceLocation Loc, SourceRange Range, 3716 CXXCastPath *BasePath = 0, 3717 bool IgnoreAccess = false); 3718 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3719 unsigned InaccessibleBaseID, 3720 unsigned AmbigiousBaseConvID, 3721 SourceLocation Loc, SourceRange Range, 3722 DeclarationName Name, 3723 CXXCastPath *BasePath); 3724 3725 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3726 3727 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3728 /// covariant, according to C++ [class.virtual]p5. 3729 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3730 const CXXMethodDecl *Old); 3731 3732 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3733 /// spec is a subset of base spec. 3734 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3735 const CXXMethodDecl *Old); 3736 3737 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3738 3739 /// CheckOverrideControl - Check C++0x override control semantics. 3740 void CheckOverrideControl(const Decl *D); 3741 3742 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3743 /// overrides a virtual member function marked 'final', according to 3744 /// C++0x [class.virtual]p3. 3745 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3746 const CXXMethodDecl *Old); 3747 3748 3749 //===--------------------------------------------------------------------===// 3750 // C++ Access Control 3751 // 3752 3753 enum AccessResult { 3754 AR_accessible, 3755 AR_inaccessible, 3756 AR_dependent, 3757 AR_delayed 3758 }; 3759 3760 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3761 NamedDecl *PrevMemberDecl, 3762 AccessSpecifier LexicalAS); 3763 3764 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3765 DeclAccessPair FoundDecl); 3766 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3767 DeclAccessPair FoundDecl); 3768 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3769 SourceRange PlacementRange, 3770 CXXRecordDecl *NamingClass, 3771 DeclAccessPair FoundDecl, 3772 bool Diagnose = true); 3773 AccessResult CheckConstructorAccess(SourceLocation Loc, 3774 CXXConstructorDecl *D, 3775 const InitializedEntity &Entity, 3776 AccessSpecifier Access, 3777 bool IsCopyBindingRefToTemp = false); 3778 AccessResult CheckConstructorAccess(SourceLocation Loc, 3779 CXXConstructorDecl *D, 3780 AccessSpecifier Access, 3781 PartialDiagnostic PD); 3782 AccessResult CheckDestructorAccess(SourceLocation Loc, 3783 CXXDestructorDecl *Dtor, 3784 const PartialDiagnostic &PDiag); 3785 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3786 NamedDecl *D, 3787 const PartialDiagnostic &PDiag); 3788 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3789 Expr *ObjectExpr, 3790 Expr *ArgExpr, 3791 DeclAccessPair FoundDecl); 3792 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3793 DeclAccessPair FoundDecl); 3794 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3795 QualType Base, QualType Derived, 3796 const CXXBasePath &Path, 3797 unsigned DiagID, 3798 bool ForceCheck = false, 3799 bool ForceUnprivileged = false); 3800 void CheckLookupAccess(const LookupResult &R); 3801 bool IsSimplyAccessible(NamedDecl *decl, DeclContext *Ctx); 3802 3803 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3804 const MultiLevelTemplateArgumentList &TemplateArgs); 3805 void PerformDependentDiagnostics(const DeclContext *Pattern, 3806 const MultiLevelTemplateArgumentList &TemplateArgs); 3807 3808 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3809 3810 /// A flag to suppress access checking. 3811 bool SuppressAccessChecking; 3812 3813 /// \brief When true, access checking violations are treated as SFINAE 3814 /// failures rather than hard errors. 3815 bool AccessCheckingSFINAE; 3816 3817 void ActOnStartSuppressingAccessChecks(); 3818 void ActOnStopSuppressingAccessChecks(); 3819 3820 enum AbstractDiagSelID { 3821 AbstractNone = -1, 3822 AbstractReturnType, 3823 AbstractParamType, 3824 AbstractVariableType, 3825 AbstractFieldType, 3826 AbstractArrayType 3827 }; 3828 3829 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3830 const PartialDiagnostic &PD); 3831 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3832 3833 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3834 AbstractDiagSelID SelID = AbstractNone); 3835 3836 //===--------------------------------------------------------------------===// 3837 // C++ Overloaded Operators [C++ 13.5] 3838 // 3839 3840 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3841 3842 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3843 3844 //===--------------------------------------------------------------------===// 3845 // C++ Templates [C++ 14] 3846 // 3847 void FilterAcceptableTemplateNames(LookupResult &R); 3848 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3849 3850 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3851 QualType ObjectType, bool EnteringContext, 3852 bool &MemberOfUnknownSpecialization); 3853 3854 TemplateNameKind isTemplateName(Scope *S, 3855 CXXScopeSpec &SS, 3856 bool hasTemplateKeyword, 3857 UnqualifiedId &Name, 3858 ParsedType ObjectType, 3859 bool EnteringContext, 3860 TemplateTy &Template, 3861 bool &MemberOfUnknownSpecialization); 3862 3863 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3864 SourceLocation IILoc, 3865 Scope *S, 3866 const CXXScopeSpec *SS, 3867 TemplateTy &SuggestedTemplate, 3868 TemplateNameKind &SuggestedKind); 3869 3870 void DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3871 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3872 3873 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3874 SourceLocation EllipsisLoc, 3875 SourceLocation KeyLoc, 3876 IdentifierInfo *ParamName, 3877 SourceLocation ParamNameLoc, 3878 unsigned Depth, unsigned Position, 3879 SourceLocation EqualLoc, 3880 ParsedType DefaultArg); 3881 3882 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3883 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3884 unsigned Depth, 3885 unsigned Position, 3886 SourceLocation EqualLoc, 3887 Expr *DefaultArg); 3888 Decl *ActOnTemplateTemplateParameter(Scope *S, 3889 SourceLocation TmpLoc, 3890 TemplateParameterList *Params, 3891 SourceLocation EllipsisLoc, 3892 IdentifierInfo *ParamName, 3893 SourceLocation ParamNameLoc, 3894 unsigned Depth, 3895 unsigned Position, 3896 SourceLocation EqualLoc, 3897 ParsedTemplateArgument DefaultArg); 3898 3899 TemplateParameterList * 3900 ActOnTemplateParameterList(unsigned Depth, 3901 SourceLocation ExportLoc, 3902 SourceLocation TemplateLoc, 3903 SourceLocation LAngleLoc, 3904 Decl **Params, unsigned NumParams, 3905 SourceLocation RAngleLoc); 3906 3907 /// \brief The context in which we are checking a template parameter 3908 /// list. 3909 enum TemplateParamListContext { 3910 TPC_ClassTemplate, 3911 TPC_FunctionTemplate, 3912 TPC_ClassTemplateMember, 3913 TPC_FriendFunctionTemplate, 3914 TPC_FriendFunctionTemplateDefinition, 3915 TPC_TypeAliasTemplate 3916 }; 3917 3918 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3919 TemplateParameterList *OldParams, 3920 TemplateParamListContext TPC); 3921 TemplateParameterList * 3922 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3923 SourceLocation DeclLoc, 3924 const CXXScopeSpec &SS, 3925 TemplateParameterList **ParamLists, 3926 unsigned NumParamLists, 3927 bool IsFriend, 3928 bool &IsExplicitSpecialization, 3929 bool &Invalid); 3930 3931 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3932 SourceLocation KWLoc, CXXScopeSpec &SS, 3933 IdentifierInfo *Name, SourceLocation NameLoc, 3934 AttributeList *Attr, 3935 TemplateParameterList *TemplateParams, 3936 AccessSpecifier AS, 3937 SourceLocation ModulePrivateLoc, 3938 unsigned NumOuterTemplateParamLists, 3939 TemplateParameterList **OuterTemplateParamLists); 3940 3941 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3942 TemplateArgumentListInfo &Out); 3943 3944 void NoteAllFoundTemplates(TemplateName Name); 3945 3946 QualType CheckTemplateIdType(TemplateName Template, 3947 SourceLocation TemplateLoc, 3948 TemplateArgumentListInfo &TemplateArgs); 3949 3950 TypeResult 3951 ActOnTemplateIdType(CXXScopeSpec &SS, 3952 TemplateTy Template, SourceLocation TemplateLoc, 3953 SourceLocation LAngleLoc, 3954 ASTTemplateArgsPtr TemplateArgs, 3955 SourceLocation RAngleLoc, 3956 bool IsCtorOrDtorName = false); 3957 3958 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3959 /// such as \c class T::template apply<U>. 3960 /// 3961 /// \param TUK 3962 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3963 TypeSpecifierType TagSpec, 3964 SourceLocation TagLoc, 3965 CXXScopeSpec &SS, 3966 TemplateTy TemplateD, 3967 SourceLocation TemplateLoc, 3968 SourceLocation LAngleLoc, 3969 ASTTemplateArgsPtr TemplateArgsIn, 3970 SourceLocation RAngleLoc); 3971 3972 3973 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3974 SourceLocation TemplateKWLoc, 3975 LookupResult &R, 3976 bool RequiresADL, 3977 const TemplateArgumentListInfo &TemplateArgs); 3978 3979 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3980 SourceLocation TemplateKWLoc, 3981 const DeclarationNameInfo &NameInfo, 3982 const TemplateArgumentListInfo &TemplateArgs); 3983 3984 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3985 CXXScopeSpec &SS, 3986 SourceLocation TemplateKWLoc, 3987 UnqualifiedId &Name, 3988 ParsedType ObjectType, 3989 bool EnteringContext, 3990 TemplateTy &Template); 3991 3992 DeclResult 3993 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3994 SourceLocation KWLoc, 3995 SourceLocation ModulePrivateLoc, 3996 CXXScopeSpec &SS, 3997 TemplateTy Template, 3998 SourceLocation TemplateNameLoc, 3999 SourceLocation LAngleLoc, 4000 ASTTemplateArgsPtr TemplateArgs, 4001 SourceLocation RAngleLoc, 4002 AttributeList *Attr, 4003 MultiTemplateParamsArg TemplateParameterLists); 4004 4005 Decl *ActOnTemplateDeclarator(Scope *S, 4006 MultiTemplateParamsArg TemplateParameterLists, 4007 Declarator &D); 4008 4009 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 4010 MultiTemplateParamsArg TemplateParameterLists, 4011 Declarator &D); 4012 4013 bool 4014 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 4015 TemplateSpecializationKind NewTSK, 4016 NamedDecl *PrevDecl, 4017 TemplateSpecializationKind PrevTSK, 4018 SourceLocation PrevPtOfInstantiation, 4019 bool &SuppressNew); 4020 4021 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 4022 const TemplateArgumentListInfo &ExplicitTemplateArgs, 4023 LookupResult &Previous); 4024 4025 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 4026 TemplateArgumentListInfo *ExplicitTemplateArgs, 4027 LookupResult &Previous); 4028 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 4029 4030 DeclResult 4031 ActOnExplicitInstantiation(Scope *S, 4032 SourceLocation ExternLoc, 4033 SourceLocation TemplateLoc, 4034 unsigned TagSpec, 4035 SourceLocation KWLoc, 4036 const CXXScopeSpec &SS, 4037 TemplateTy Template, 4038 SourceLocation TemplateNameLoc, 4039 SourceLocation LAngleLoc, 4040 ASTTemplateArgsPtr TemplateArgs, 4041 SourceLocation RAngleLoc, 4042 AttributeList *Attr); 4043 4044 DeclResult 4045 ActOnExplicitInstantiation(Scope *S, 4046 SourceLocation ExternLoc, 4047 SourceLocation TemplateLoc, 4048 unsigned TagSpec, 4049 SourceLocation KWLoc, 4050 CXXScopeSpec &SS, 4051 IdentifierInfo *Name, 4052 SourceLocation NameLoc, 4053 AttributeList *Attr); 4054 4055 DeclResult ActOnExplicitInstantiation(Scope *S, 4056 SourceLocation ExternLoc, 4057 SourceLocation TemplateLoc, 4058 Declarator &D); 4059 4060 TemplateArgumentLoc 4061 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 4062 SourceLocation TemplateLoc, 4063 SourceLocation RAngleLoc, 4064 Decl *Param, 4065 SmallVectorImpl<TemplateArgument> &Converted); 4066 4067 /// \brief Specifies the context in which a particular template 4068 /// argument is being checked. 4069 enum CheckTemplateArgumentKind { 4070 /// \brief The template argument was specified in the code or was 4071 /// instantiated with some deduced template arguments. 4072 CTAK_Specified, 4073 4074 /// \brief The template argument was deduced via template argument 4075 /// deduction. 4076 CTAK_Deduced, 4077 4078 /// \brief The template argument was deduced from an array bound 4079 /// via template argument deduction. 4080 CTAK_DeducedFromArrayBound 4081 }; 4082 4083 bool CheckTemplateArgument(NamedDecl *Param, 4084 const TemplateArgumentLoc &Arg, 4085 NamedDecl *Template, 4086 SourceLocation TemplateLoc, 4087 SourceLocation RAngleLoc, 4088 unsigned ArgumentPackIndex, 4089 SmallVectorImpl<TemplateArgument> &Converted, 4090 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4091 4092 /// \brief Check that the given template arguments can be be provided to 4093 /// the given template, converting the arguments along the way. 4094 /// 4095 /// \param Template The template to which the template arguments are being 4096 /// provided. 4097 /// 4098 /// \param TemplateLoc The location of the template name in the source. 4099 /// 4100 /// \param TemplateArgs The list of template arguments. If the template is 4101 /// a template template parameter, this function may extend the set of 4102 /// template arguments to also include substituted, defaulted template 4103 /// arguments. 4104 /// 4105 /// \param PartialTemplateArgs True if the list of template arguments is 4106 /// intentionally partial, e.g., because we're checking just the initial 4107 /// set of template arguments. 4108 /// 4109 /// \param Converted Will receive the converted, canonicalized template 4110 /// arguments. 4111 /// 4112 /// \returns True if an error occurred, false otherwise. 4113 bool CheckTemplateArgumentList(TemplateDecl *Template, 4114 SourceLocation TemplateLoc, 4115 TemplateArgumentListInfo &TemplateArgs, 4116 bool PartialTemplateArgs, 4117 SmallVectorImpl<TemplateArgument> &Converted); 4118 4119 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 4120 const TemplateArgumentLoc &Arg, 4121 SmallVectorImpl<TemplateArgument> &Converted); 4122 4123 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 4124 TypeSourceInfo *Arg); 4125 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 4126 TemplateArgument &Converted); 4127 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 4128 QualType InstantiatedParamType, Expr *Arg, 4129 TemplateArgument &Converted, 4130 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4131 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 4132 const TemplateArgumentLoc &Arg); 4133 4134 ExprResult 4135 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 4136 QualType ParamType, 4137 SourceLocation Loc); 4138 ExprResult 4139 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 4140 SourceLocation Loc); 4141 4142 /// \brief Enumeration describing how template parameter lists are compared 4143 /// for equality. 4144 enum TemplateParameterListEqualKind { 4145 /// \brief We are matching the template parameter lists of two templates 4146 /// that might be redeclarations. 4147 /// 4148 /// \code 4149 /// template<typename T> struct X; 4150 /// template<typename T> struct X; 4151 /// \endcode 4152 TPL_TemplateMatch, 4153 4154 /// \brief We are matching the template parameter lists of two template 4155 /// template parameters as part of matching the template parameter lists 4156 /// of two templates that might be redeclarations. 4157 /// 4158 /// \code 4159 /// template<template<int I> class TT> struct X; 4160 /// template<template<int Value> class Other> struct X; 4161 /// \endcode 4162 TPL_TemplateTemplateParmMatch, 4163 4164 /// \brief We are matching the template parameter lists of a template 4165 /// template argument against the template parameter lists of a template 4166 /// template parameter. 4167 /// 4168 /// \code 4169 /// template<template<int Value> class Metafun> struct X; 4170 /// template<int Value> struct integer_c; 4171 /// X<integer_c> xic; 4172 /// \endcode 4173 TPL_TemplateTemplateArgumentMatch 4174 }; 4175 4176 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 4177 TemplateParameterList *Old, 4178 bool Complain, 4179 TemplateParameterListEqualKind Kind, 4180 SourceLocation TemplateArgLoc 4181 = SourceLocation()); 4182 4183 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 4184 4185 /// \brief Called when the parser has parsed a C++ typename 4186 /// specifier, e.g., "typename T::type". 4187 /// 4188 /// \param S The scope in which this typename type occurs. 4189 /// \param TypenameLoc the location of the 'typename' keyword 4190 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4191 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 4192 /// \param IdLoc the location of the identifier. 4193 TypeResult 4194 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4195 const CXXScopeSpec &SS, const IdentifierInfo &II, 4196 SourceLocation IdLoc); 4197 4198 /// \brief Called when the parser has parsed a C++ typename 4199 /// specifier that ends in a template-id, e.g., 4200 /// "typename MetaFun::template apply<T1, T2>". 4201 /// 4202 /// \param S The scope in which this typename type occurs. 4203 /// \param TypenameLoc the location of the 'typename' keyword 4204 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4205 /// \param TemplateLoc the location of the 'template' keyword, if any. 4206 /// \param TemplateName The template name. 4207 /// \param TemplateNameLoc The location of the template name. 4208 /// \param LAngleLoc The location of the opening angle bracket ('<'). 4209 /// \param TemplateArgs The template arguments. 4210 /// \param RAngleLoc The location of the closing angle bracket ('>'). 4211 TypeResult 4212 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4213 const CXXScopeSpec &SS, 4214 SourceLocation TemplateLoc, 4215 TemplateTy Template, 4216 SourceLocation TemplateNameLoc, 4217 SourceLocation LAngleLoc, 4218 ASTTemplateArgsPtr TemplateArgs, 4219 SourceLocation RAngleLoc); 4220 4221 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 4222 SourceLocation KeywordLoc, 4223 NestedNameSpecifierLoc QualifierLoc, 4224 const IdentifierInfo &II, 4225 SourceLocation IILoc); 4226 4227 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 4228 SourceLocation Loc, 4229 DeclarationName Name); 4230 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 4231 4232 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 4233 bool RebuildTemplateParamsInCurrentInstantiation( 4234 TemplateParameterList *Params); 4235 4236 std::string 4237 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4238 const TemplateArgumentList &Args); 4239 4240 std::string 4241 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4242 const TemplateArgument *Args, 4243 unsigned NumArgs); 4244 4245 //===--------------------------------------------------------------------===// 4246 // C++ Variadic Templates (C++0x [temp.variadic]) 4247 //===--------------------------------------------------------------------===// 4248 4249 /// \brief The context in which an unexpanded parameter pack is 4250 /// being diagnosed. 4251 /// 4252 /// Note that the values of this enumeration line up with the first 4253 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4254 enum UnexpandedParameterPackContext { 4255 /// \brief An arbitrary expression. 4256 UPPC_Expression = 0, 4257 4258 /// \brief The base type of a class type. 4259 UPPC_BaseType, 4260 4261 /// \brief The type of an arbitrary declaration. 4262 UPPC_DeclarationType, 4263 4264 /// \brief The type of a data member. 4265 UPPC_DataMemberType, 4266 4267 /// \brief The size of a bit-field. 4268 UPPC_BitFieldWidth, 4269 4270 /// \brief The expression in a static assertion. 4271 UPPC_StaticAssertExpression, 4272 4273 /// \brief The fixed underlying type of an enumeration. 4274 UPPC_FixedUnderlyingType, 4275 4276 /// \brief The enumerator value. 4277 UPPC_EnumeratorValue, 4278 4279 /// \brief A using declaration. 4280 UPPC_UsingDeclaration, 4281 4282 /// \brief A friend declaration. 4283 UPPC_FriendDeclaration, 4284 4285 /// \brief A declaration qualifier. 4286 UPPC_DeclarationQualifier, 4287 4288 /// \brief An initializer. 4289 UPPC_Initializer, 4290 4291 /// \brief A default argument. 4292 UPPC_DefaultArgument, 4293 4294 /// \brief The type of a non-type template parameter. 4295 UPPC_NonTypeTemplateParameterType, 4296 4297 /// \brief The type of an exception. 4298 UPPC_ExceptionType, 4299 4300 /// \brief Partial specialization. 4301 UPPC_PartialSpecialization, 4302 4303 /// \brief Microsoft __if_exists. 4304 UPPC_IfExists, 4305 4306 /// \brief Microsoft __if_not_exists. 4307 UPPC_IfNotExists 4308}; 4309 4310 /// \brief Diagnose unexpanded parameter packs. 4311 /// 4312 /// \param Loc The location at which we should emit the diagnostic. 4313 /// 4314 /// \param UPPC The context in which we are diagnosing unexpanded 4315 /// parameter packs. 4316 /// 4317 /// \param Unexpanded the set of unexpanded parameter packs. 4318 void DiagnoseUnexpandedParameterPacks(SourceLocation Loc, 4319 UnexpandedParameterPackContext UPPC, 4320 const SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4321 4322 /// \brief If the given type contains an unexpanded parameter pack, 4323 /// diagnose the error. 4324 /// 4325 /// \param Loc The source location where a diagnostc should be emitted. 4326 /// 4327 /// \param T The type that is being checked for unexpanded parameter 4328 /// packs. 4329 /// 4330 /// \returns true if an error occurred, false otherwise. 4331 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4332 UnexpandedParameterPackContext UPPC); 4333 4334 /// \brief If the given expression contains an unexpanded parameter 4335 /// pack, diagnose the error. 4336 /// 4337 /// \param E The expression that is being checked for unexpanded 4338 /// parameter packs. 4339 /// 4340 /// \returns true if an error occurred, false otherwise. 4341 bool DiagnoseUnexpandedParameterPack(Expr *E, 4342 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4343 4344 /// \brief If the given nested-name-specifier contains an unexpanded 4345 /// parameter pack, diagnose the error. 4346 /// 4347 /// \param SS The nested-name-specifier that is being checked for 4348 /// unexpanded parameter packs. 4349 /// 4350 /// \returns true if an error occurred, false otherwise. 4351 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4352 UnexpandedParameterPackContext UPPC); 4353 4354 /// \brief If the given name contains an unexpanded parameter pack, 4355 /// diagnose the error. 4356 /// 4357 /// \param NameInfo The name (with source location information) that 4358 /// is being checked for unexpanded parameter packs. 4359 /// 4360 /// \returns true if an error occurred, false otherwise. 4361 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4362 UnexpandedParameterPackContext UPPC); 4363 4364 /// \brief If the given template name contains an unexpanded parameter pack, 4365 /// diagnose the error. 4366 /// 4367 /// \param Loc The location of the template name. 4368 /// 4369 /// \param Template The template name that is being checked for unexpanded 4370 /// parameter packs. 4371 /// 4372 /// \returns true if an error occurred, false otherwise. 4373 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4374 TemplateName Template, 4375 UnexpandedParameterPackContext UPPC); 4376 4377 /// \brief If the given template argument contains an unexpanded parameter 4378 /// pack, diagnose the error. 4379 /// 4380 /// \param Arg The template argument that is being checked for unexpanded 4381 /// parameter packs. 4382 /// 4383 /// \returns true if an error occurred, false otherwise. 4384 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4385 UnexpandedParameterPackContext UPPC); 4386 4387 /// \brief Collect the set of unexpanded parameter packs within the given 4388 /// template argument. 4389 /// 4390 /// \param Arg The template argument that will be traversed to find 4391 /// unexpanded parameter packs. 4392 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4393 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4394 4395 /// \brief Collect the set of unexpanded parameter packs within the given 4396 /// template argument. 4397 /// 4398 /// \param Arg The template argument that will be traversed to find 4399 /// unexpanded parameter packs. 4400 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4401 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4402 4403 /// \brief Collect the set of unexpanded parameter packs within the given 4404 /// type. 4405 /// 4406 /// \param T The type that will be traversed to find 4407 /// unexpanded parameter packs. 4408 void collectUnexpandedParameterPacks(QualType T, 4409 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4410 4411 /// \brief Collect the set of unexpanded parameter packs within the given 4412 /// type. 4413 /// 4414 /// \param TL The type that will be traversed to find 4415 /// unexpanded parameter packs. 4416 void collectUnexpandedParameterPacks(TypeLoc TL, 4417 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4418 4419 /// \brief Collect the set of unexpanded parameter packs within the given 4420 /// nested-name-specifier. 4421 /// 4422 /// \param SS The nested-name-specifier that will be traversed to find 4423 /// unexpanded parameter packs. 4424 void collectUnexpandedParameterPacks(CXXScopeSpec &SS, 4425 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4426 4427 /// \brief Collect the set of unexpanded parameter packs within the given 4428 /// name. 4429 /// 4430 /// \param NameInfo The name that will be traversed to find 4431 /// unexpanded parameter packs. 4432 void collectUnexpandedParameterPacks(const DeclarationNameInfo &NameInfo, 4433 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4434 4435 /// \brief Invoked when parsing a template argument followed by an 4436 /// ellipsis, which creates a pack expansion. 4437 /// 4438 /// \param Arg The template argument preceding the ellipsis, which 4439 /// may already be invalid. 4440 /// 4441 /// \param EllipsisLoc The location of the ellipsis. 4442 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4443 SourceLocation EllipsisLoc); 4444 4445 /// \brief Invoked when parsing a type followed by an ellipsis, which 4446 /// creates a pack expansion. 4447 /// 4448 /// \param Type The type preceding the ellipsis, which will become 4449 /// the pattern of the pack expansion. 4450 /// 4451 /// \param EllipsisLoc The location of the ellipsis. 4452 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4453 4454 /// \brief Construct a pack expansion type from the pattern of the pack 4455 /// expansion. 4456 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4457 SourceLocation EllipsisLoc, 4458 llvm::Optional<unsigned> NumExpansions); 4459 4460 /// \brief Construct a pack expansion type from the pattern of the pack 4461 /// expansion. 4462 QualType CheckPackExpansion(QualType Pattern, 4463 SourceRange PatternRange, 4464 SourceLocation EllipsisLoc, 4465 llvm::Optional<unsigned> NumExpansions); 4466 4467 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4468 /// creates a pack expansion. 4469 /// 4470 /// \param Pattern The expression preceding the ellipsis, which will become 4471 /// the pattern of the pack expansion. 4472 /// 4473 /// \param EllipsisLoc The location of the ellipsis. 4474 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4475 4476 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4477 /// creates a pack expansion. 4478 /// 4479 /// \param Pattern The expression preceding the ellipsis, which will become 4480 /// the pattern of the pack expansion. 4481 /// 4482 /// \param EllipsisLoc The location of the ellipsis. 4483 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4484 llvm::Optional<unsigned> NumExpansions); 4485 4486 /// \brief Determine whether we could expand a pack expansion with the 4487 /// given set of parameter packs into separate arguments by repeatedly 4488 /// transforming the pattern. 4489 /// 4490 /// \param EllipsisLoc The location of the ellipsis that identifies the 4491 /// pack expansion. 4492 /// 4493 /// \param PatternRange The source range that covers the entire pattern of 4494 /// the pack expansion. 4495 /// 4496 /// \param Unexpanded The set of unexpanded parameter packs within the 4497 /// pattern. 4498 /// 4499 /// \param NumUnexpanded The number of unexpanded parameter packs in 4500 /// \p Unexpanded. 4501 /// 4502 /// \param ShouldExpand Will be set to \c true if the transformer should 4503 /// expand the corresponding pack expansions into separate arguments. When 4504 /// set, \c NumExpansions must also be set. 4505 /// 4506 /// \param RetainExpansion Whether the caller should add an unexpanded 4507 /// pack expansion after all of the expanded arguments. This is used 4508 /// when extending explicitly-specified template argument packs per 4509 /// C++0x [temp.arg.explicit]p9. 4510 /// 4511 /// \param NumExpansions The number of separate arguments that will be in 4512 /// the expanded form of the corresponding pack expansion. This is both an 4513 /// input and an output parameter, which can be set by the caller if the 4514 /// number of expansions is known a priori (e.g., due to a prior substitution) 4515 /// and will be set by the callee when the number of expansions is known. 4516 /// The callee must set this value when \c ShouldExpand is \c true; it may 4517 /// set this value in other cases. 4518 /// 4519 /// \returns true if an error occurred (e.g., because the parameter packs 4520 /// are to be instantiated with arguments of different lengths), false 4521 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4522 /// must be set. 4523 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4524 SourceRange PatternRange, 4525 llvm::ArrayRef<UnexpandedParameterPack> Unexpanded, 4526 const MultiLevelTemplateArgumentList &TemplateArgs, 4527 bool &ShouldExpand, 4528 bool &RetainExpansion, 4529 llvm::Optional<unsigned> &NumExpansions); 4530 4531 /// \brief Determine the number of arguments in the given pack expansion 4532 /// type. 4533 /// 4534 /// This routine already assumes that the pack expansion type can be 4535 /// expanded and that the number of arguments in the expansion is 4536 /// consistent across all of the unexpanded parameter packs in its pattern. 4537 unsigned getNumArgumentsInExpansion(QualType T, 4538 const MultiLevelTemplateArgumentList &TemplateArgs); 4539 4540 /// \brief Determine whether the given declarator contains any unexpanded 4541 /// parameter packs. 4542 /// 4543 /// This routine is used by the parser to disambiguate function declarators 4544 /// with an ellipsis prior to the ')', e.g., 4545 /// 4546 /// \code 4547 /// void f(T...); 4548 /// \endcode 4549 /// 4550 /// To determine whether we have an (unnamed) function parameter pack or 4551 /// a variadic function. 4552 /// 4553 /// \returns true if the declarator contains any unexpanded parameter packs, 4554 /// false otherwise. 4555 bool containsUnexpandedParameterPacks(Declarator &D); 4556 4557 //===--------------------------------------------------------------------===// 4558 // C++ Template Argument Deduction (C++ [temp.deduct]) 4559 //===--------------------------------------------------------------------===// 4560 4561 /// \brief Describes the result of template argument deduction. 4562 /// 4563 /// The TemplateDeductionResult enumeration describes the result of 4564 /// template argument deduction, as returned from 4565 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4566 /// structure provides additional information about the results of 4567 /// template argument deduction, e.g., the deduced template argument 4568 /// list (if successful) or the specific template parameters or 4569 /// deduced arguments that were involved in the failure. 4570 enum TemplateDeductionResult { 4571 /// \brief Template argument deduction was successful. 4572 TDK_Success = 0, 4573 /// \brief Template argument deduction exceeded the maximum template 4574 /// instantiation depth (which has already been diagnosed). 4575 TDK_InstantiationDepth, 4576 /// \brief Template argument deduction did not deduce a value 4577 /// for every template parameter. 4578 TDK_Incomplete, 4579 /// \brief Template argument deduction produced inconsistent 4580 /// deduced values for the given template parameter. 4581 TDK_Inconsistent, 4582 /// \brief Template argument deduction failed due to inconsistent 4583 /// cv-qualifiers on a template parameter type that would 4584 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4585 /// but were given a non-const "X". 4586 TDK_Underqualified, 4587 /// \brief Substitution of the deduced template argument values 4588 /// resulted in an error. 4589 TDK_SubstitutionFailure, 4590 /// \brief Substitution of the deduced template argument values 4591 /// into a non-deduced context produced a type or value that 4592 /// produces a type that does not match the original template 4593 /// arguments provided. 4594 TDK_NonDeducedMismatch, 4595 /// \brief When performing template argument deduction for a function 4596 /// template, there were too many call arguments. 4597 TDK_TooManyArguments, 4598 /// \brief When performing template argument deduction for a function 4599 /// template, there were too few call arguments. 4600 TDK_TooFewArguments, 4601 /// \brief The explicitly-specified template arguments were not valid 4602 /// template arguments for the given template. 4603 TDK_InvalidExplicitArguments, 4604 /// \brief The arguments included an overloaded function name that could 4605 /// not be resolved to a suitable function. 4606 TDK_FailedOverloadResolution 4607 }; 4608 4609 TemplateDeductionResult 4610 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4611 const TemplateArgumentList &TemplateArgs, 4612 sema::TemplateDeductionInfo &Info); 4613 4614 TemplateDeductionResult 4615 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4616 TemplateArgumentListInfo &ExplicitTemplateArgs, 4617 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4618 SmallVectorImpl<QualType> &ParamTypes, 4619 QualType *FunctionType, 4620 sema::TemplateDeductionInfo &Info); 4621 4622 /// brief A function argument from which we performed template argument 4623 // deduction for a call. 4624 struct OriginalCallArg { 4625 OriginalCallArg(QualType OriginalParamType, 4626 unsigned ArgIdx, 4627 QualType OriginalArgType) 4628 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4629 OriginalArgType(OriginalArgType) { } 4630 4631 QualType OriginalParamType; 4632 unsigned ArgIdx; 4633 QualType OriginalArgType; 4634 }; 4635 4636 TemplateDeductionResult 4637 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4638 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4639 unsigned NumExplicitlySpecified, 4640 FunctionDecl *&Specialization, 4641 sema::TemplateDeductionInfo &Info, 4642 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4643 4644 TemplateDeductionResult 4645 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4646 TemplateArgumentListInfo *ExplicitTemplateArgs, 4647 Expr **Args, unsigned NumArgs, 4648 FunctionDecl *&Specialization, 4649 sema::TemplateDeductionInfo &Info); 4650 4651 TemplateDeductionResult 4652 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4653 TemplateArgumentListInfo *ExplicitTemplateArgs, 4654 QualType ArgFunctionType, 4655 FunctionDecl *&Specialization, 4656 sema::TemplateDeductionInfo &Info); 4657 4658 TemplateDeductionResult 4659 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4660 QualType ToType, 4661 CXXConversionDecl *&Specialization, 4662 sema::TemplateDeductionInfo &Info); 4663 4664 TemplateDeductionResult 4665 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4666 TemplateArgumentListInfo *ExplicitTemplateArgs, 4667 FunctionDecl *&Specialization, 4668 sema::TemplateDeductionInfo &Info); 4669 4670 /// \brief Result type of DeduceAutoType. 4671 enum DeduceAutoResult { 4672 DAR_Succeeded, 4673 DAR_Failed, 4674 DAR_FailedAlreadyDiagnosed 4675 }; 4676 4677 DeduceAutoResult DeduceAutoType(TypeSourceInfo *AutoType, Expr *&Initializer, 4678 TypeSourceInfo *&Result); 4679 void DiagnoseAutoDeductionFailure(VarDecl *VDecl, Expr *Init); 4680 4681 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4682 FunctionTemplateDecl *FT2, 4683 SourceLocation Loc, 4684 TemplatePartialOrderingContext TPOC, 4685 unsigned NumCallArguments); 4686 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4687 UnresolvedSetIterator SEnd, 4688 TemplatePartialOrderingContext TPOC, 4689 unsigned NumCallArguments, 4690 SourceLocation Loc, 4691 const PartialDiagnostic &NoneDiag, 4692 const PartialDiagnostic &AmbigDiag, 4693 const PartialDiagnostic &CandidateDiag, 4694 bool Complain = true, 4695 QualType TargetType = QualType()); 4696 4697 ClassTemplatePartialSpecializationDecl * 4698 getMoreSpecializedPartialSpecialization( 4699 ClassTemplatePartialSpecializationDecl *PS1, 4700 ClassTemplatePartialSpecializationDecl *PS2, 4701 SourceLocation Loc); 4702 4703 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4704 bool OnlyDeduced, 4705 unsigned Depth, 4706 llvm::SmallBitVector &Used); 4707 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4708 llvm::SmallBitVector &Deduced) { 4709 return MarkDeducedTemplateParameters(Context, FunctionTemplate, Deduced); 4710 } 4711 static void MarkDeducedTemplateParameters(ASTContext &Ctx, 4712 FunctionTemplateDecl *FunctionTemplate, 4713 llvm::SmallBitVector &Deduced); 4714 4715 //===--------------------------------------------------------------------===// 4716 // C++ Template Instantiation 4717 // 4718 4719 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4720 const TemplateArgumentList *Innermost = 0, 4721 bool RelativeToPrimary = false, 4722 const FunctionDecl *Pattern = 0); 4723 4724 /// \brief A template instantiation that is currently in progress. 4725 struct ActiveTemplateInstantiation { 4726 /// \brief The kind of template instantiation we are performing 4727 enum InstantiationKind { 4728 /// We are instantiating a template declaration. The entity is 4729 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4730 TemplateInstantiation, 4731 4732 /// We are instantiating a default argument for a template 4733 /// parameter. The Entity is the template, and 4734 /// TemplateArgs/NumTemplateArguments provides the template 4735 /// arguments as specified. 4736 /// FIXME: Use a TemplateArgumentList 4737 DefaultTemplateArgumentInstantiation, 4738 4739 /// We are instantiating a default argument for a function. 4740 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4741 /// provides the template arguments as specified. 4742 DefaultFunctionArgumentInstantiation, 4743 4744 /// We are substituting explicit template arguments provided for 4745 /// a function template. The entity is a FunctionTemplateDecl. 4746 ExplicitTemplateArgumentSubstitution, 4747 4748 /// We are substituting template argument determined as part of 4749 /// template argument deduction for either a class template 4750 /// partial specialization or a function template. The 4751 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4752 /// a FunctionTemplateDecl. 4753 DeducedTemplateArgumentSubstitution, 4754 4755 /// We are substituting prior template arguments into a new 4756 /// template parameter. The template parameter itself is either a 4757 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4758 PriorTemplateArgumentSubstitution, 4759 4760 /// We are checking the validity of a default template argument that 4761 /// has been used when naming a template-id. 4762 DefaultTemplateArgumentChecking 4763 } Kind; 4764 4765 /// \brief The point of instantiation within the source code. 4766 SourceLocation PointOfInstantiation; 4767 4768 /// \brief The template (or partial specialization) in which we are 4769 /// performing the instantiation, for substitutions of prior template 4770 /// arguments. 4771 NamedDecl *Template; 4772 4773 /// \brief The entity that is being instantiated. 4774 uintptr_t Entity; 4775 4776 /// \brief The list of template arguments we are substituting, if they 4777 /// are not part of the entity. 4778 const TemplateArgument *TemplateArgs; 4779 4780 /// \brief The number of template arguments in TemplateArgs. 4781 unsigned NumTemplateArgs; 4782 4783 /// \brief The template deduction info object associated with the 4784 /// substitution or checking of explicit or deduced template arguments. 4785 sema::TemplateDeductionInfo *DeductionInfo; 4786 4787 /// \brief The source range that covers the construct that cause 4788 /// the instantiation, e.g., the template-id that causes a class 4789 /// template instantiation. 4790 SourceRange InstantiationRange; 4791 4792 ActiveTemplateInstantiation() 4793 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4794 NumTemplateArgs(0), DeductionInfo(0) {} 4795 4796 /// \brief Determines whether this template is an actual instantiation 4797 /// that should be counted toward the maximum instantiation depth. 4798 bool isInstantiationRecord() const; 4799 4800 friend bool operator==(const ActiveTemplateInstantiation &X, 4801 const ActiveTemplateInstantiation &Y) { 4802 if (X.Kind != Y.Kind) 4803 return false; 4804 4805 if (X.Entity != Y.Entity) 4806 return false; 4807 4808 switch (X.Kind) { 4809 case TemplateInstantiation: 4810 return true; 4811 4812 case PriorTemplateArgumentSubstitution: 4813 case DefaultTemplateArgumentChecking: 4814 if (X.Template != Y.Template) 4815 return false; 4816 4817 // Fall through 4818 4819 case DefaultTemplateArgumentInstantiation: 4820 case ExplicitTemplateArgumentSubstitution: 4821 case DeducedTemplateArgumentSubstitution: 4822 case DefaultFunctionArgumentInstantiation: 4823 return X.TemplateArgs == Y.TemplateArgs; 4824 4825 } 4826 4827 llvm_unreachable("Invalid InstantiationKind!"); 4828 } 4829 4830 friend bool operator!=(const ActiveTemplateInstantiation &X, 4831 const ActiveTemplateInstantiation &Y) { 4832 return !(X == Y); 4833 } 4834 }; 4835 4836 /// \brief List of active template instantiations. 4837 /// 4838 /// This vector is treated as a stack. As one template instantiation 4839 /// requires another template instantiation, additional 4840 /// instantiations are pushed onto the stack up to a 4841 /// user-configurable limit LangOptions::InstantiationDepth. 4842 SmallVector<ActiveTemplateInstantiation, 16> 4843 ActiveTemplateInstantiations; 4844 4845 /// \brief Whether we are in a SFINAE context that is not associated with 4846 /// template instantiation. 4847 /// 4848 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4849 /// of a template instantiation or template argument deduction. 4850 bool InNonInstantiationSFINAEContext; 4851 4852 /// \brief The number of ActiveTemplateInstantiation entries in 4853 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4854 /// therefore, should not be counted as part of the instantiation depth. 4855 unsigned NonInstantiationEntries; 4856 4857 /// \brief The last template from which a template instantiation 4858 /// error or warning was produced. 4859 /// 4860 /// This value is used to suppress printing of redundant template 4861 /// instantiation backtraces when there are multiple errors in the 4862 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4863 /// to implement it anywhere else. 4864 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4865 4866 /// \brief The current index into pack expansion arguments that will be 4867 /// used for substitution of parameter packs. 4868 /// 4869 /// The pack expansion index will be -1 to indicate that parameter packs 4870 /// should be instantiated as themselves. Otherwise, the index specifies 4871 /// which argument within the parameter pack will be used for substitution. 4872 int ArgumentPackSubstitutionIndex; 4873 4874 /// \brief RAII object used to change the argument pack substitution index 4875 /// within a \c Sema object. 4876 /// 4877 /// See \c ArgumentPackSubstitutionIndex for more information. 4878 class ArgumentPackSubstitutionIndexRAII { 4879 Sema &Self; 4880 int OldSubstitutionIndex; 4881 4882 public: 4883 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4884 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4885 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4886 } 4887 4888 ~ArgumentPackSubstitutionIndexRAII() { 4889 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4890 } 4891 }; 4892 4893 friend class ArgumentPackSubstitutionRAII; 4894 4895 /// \brief The stack of calls expression undergoing template instantiation. 4896 /// 4897 /// The top of this stack is used by a fixit instantiating unresolved 4898 /// function calls to fix the AST to match the textual change it prints. 4899 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4900 4901 /// \brief For each declaration that involved template argument deduction, the 4902 /// set of diagnostics that were suppressed during that template argument 4903 /// deduction. 4904 /// 4905 /// FIXME: Serialize this structure to the AST file. 4906 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 4907 SuppressedDiagnostics; 4908 4909 /// \brief A stack object to be created when performing template 4910 /// instantiation. 4911 /// 4912 /// Construction of an object of type \c InstantiatingTemplate 4913 /// pushes the current instantiation onto the stack of active 4914 /// instantiations. If the size of this stack exceeds the maximum 4915 /// number of recursive template instantiations, construction 4916 /// produces an error and evaluates true. 4917 /// 4918 /// Destruction of this object will pop the named instantiation off 4919 /// the stack. 4920 struct InstantiatingTemplate { 4921 /// \brief Note that we are instantiating a class template, 4922 /// function template, or a member thereof. 4923 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4924 Decl *Entity, 4925 SourceRange InstantiationRange = SourceRange()); 4926 4927 /// \brief Note that we are instantiating a default argument in a 4928 /// template-id. 4929 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4930 TemplateDecl *Template, 4931 const TemplateArgument *TemplateArgs, 4932 unsigned NumTemplateArgs, 4933 SourceRange InstantiationRange = SourceRange()); 4934 4935 /// \brief Note that we are instantiating a default argument in a 4936 /// template-id. 4937 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4938 FunctionTemplateDecl *FunctionTemplate, 4939 const TemplateArgument *TemplateArgs, 4940 unsigned NumTemplateArgs, 4941 ActiveTemplateInstantiation::InstantiationKind Kind, 4942 sema::TemplateDeductionInfo &DeductionInfo, 4943 SourceRange InstantiationRange = SourceRange()); 4944 4945 /// \brief Note that we are instantiating as part of template 4946 /// argument deduction for a class template partial 4947 /// specialization. 4948 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4949 ClassTemplatePartialSpecializationDecl *PartialSpec, 4950 const TemplateArgument *TemplateArgs, 4951 unsigned NumTemplateArgs, 4952 sema::TemplateDeductionInfo &DeductionInfo, 4953 SourceRange InstantiationRange = SourceRange()); 4954 4955 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4956 ParmVarDecl *Param, 4957 const TemplateArgument *TemplateArgs, 4958 unsigned NumTemplateArgs, 4959 SourceRange InstantiationRange = SourceRange()); 4960 4961 /// \brief Note that we are substituting prior template arguments into a 4962 /// non-type or template template parameter. 4963 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4964 NamedDecl *Template, 4965 NonTypeTemplateParmDecl *Param, 4966 const TemplateArgument *TemplateArgs, 4967 unsigned NumTemplateArgs, 4968 SourceRange InstantiationRange); 4969 4970 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4971 NamedDecl *Template, 4972 TemplateTemplateParmDecl *Param, 4973 const TemplateArgument *TemplateArgs, 4974 unsigned NumTemplateArgs, 4975 SourceRange InstantiationRange); 4976 4977 /// \brief Note that we are checking the default template argument 4978 /// against the template parameter for a given template-id. 4979 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4980 TemplateDecl *Template, 4981 NamedDecl *Param, 4982 const TemplateArgument *TemplateArgs, 4983 unsigned NumTemplateArgs, 4984 SourceRange InstantiationRange); 4985 4986 4987 /// \brief Note that we have finished instantiating this template. 4988 void Clear(); 4989 4990 ~InstantiatingTemplate() { Clear(); } 4991 4992 /// \brief Determines whether we have exceeded the maximum 4993 /// recursive template instantiations. 4994 operator bool() const { return Invalid; } 4995 4996 private: 4997 Sema &SemaRef; 4998 bool Invalid; 4999 bool SavedInNonInstantiationSFINAEContext; 5000 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 5001 SourceRange InstantiationRange); 5002 5003 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 5004 5005 InstantiatingTemplate& 5006 operator=(const InstantiatingTemplate&); // not implemented 5007 }; 5008 5009 void PrintInstantiationStack(); 5010 5011 /// \brief Determines whether we are currently in a context where 5012 /// template argument substitution failures are not considered 5013 /// errors. 5014 /// 5015 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 5016 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 5017 /// template-deduction context object, which can be used to capture 5018 /// diagnostics that will be suppressed. 5019 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 5020 5021 /// \brief RAII class used to determine whether SFINAE has 5022 /// trapped any errors that occur during template argument 5023 /// deduction.` 5024 class SFINAETrap { 5025 Sema &SemaRef; 5026 unsigned PrevSFINAEErrors; 5027 bool PrevInNonInstantiationSFINAEContext; 5028 bool PrevAccessCheckingSFINAE; 5029 5030 public: 5031 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 5032 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 5033 PrevInNonInstantiationSFINAEContext( 5034 SemaRef.InNonInstantiationSFINAEContext), 5035 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 5036 { 5037 if (!SemaRef.isSFINAEContext()) 5038 SemaRef.InNonInstantiationSFINAEContext = true; 5039 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 5040 } 5041 5042 ~SFINAETrap() { 5043 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 5044 SemaRef.InNonInstantiationSFINAEContext 5045 = PrevInNonInstantiationSFINAEContext; 5046 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 5047 } 5048 5049 /// \brief Determine whether any SFINAE errors have been trapped. 5050 bool hasErrorOccurred() const { 5051 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 5052 } 5053 }; 5054 5055 /// \brief The current instantiation scope used to store local 5056 /// variables. 5057 LocalInstantiationScope *CurrentInstantiationScope; 5058 5059 /// \brief The number of typos corrected by CorrectTypo. 5060 unsigned TyposCorrected; 5061 5062 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 5063 UnqualifiedTyposCorrectedMap; 5064 5065 /// \brief A cache containing the results of typo correction for unqualified 5066 /// name lookup. 5067 /// 5068 /// The string is the string that we corrected to (which may be empty, if 5069 /// there was no correction), while the boolean will be true when the 5070 /// string represents a keyword. 5071 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 5072 5073 /// \brief Worker object for performing CFG-based warnings. 5074 sema::AnalysisBasedWarnings AnalysisWarnings; 5075 5076 /// \brief An entity for which implicit template instantiation is required. 5077 /// 5078 /// The source location associated with the declaration is the first place in 5079 /// the source code where the declaration was "used". It is not necessarily 5080 /// the point of instantiation (which will be either before or after the 5081 /// namespace-scope declaration that triggered this implicit instantiation), 5082 /// However, it is the location that diagnostics should generally refer to, 5083 /// because users will need to know what code triggered the instantiation. 5084 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 5085 5086 /// \brief The queue of implicit template instantiations that are required 5087 /// but have not yet been performed. 5088 std::deque<PendingImplicitInstantiation> PendingInstantiations; 5089 5090 /// \brief The queue of implicit template instantiations that are required 5091 /// and must be performed within the current local scope. 5092 /// 5093 /// This queue is only used for member functions of local classes in 5094 /// templates, which must be instantiated in the same scope as their 5095 /// enclosing function, so that they can reference function-local 5096 /// types, static variables, enumerators, etc. 5097 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 5098 5099 void PerformPendingInstantiations(bool LocalOnly = false); 5100 5101 TypeSourceInfo *SubstType(TypeSourceInfo *T, 5102 const MultiLevelTemplateArgumentList &TemplateArgs, 5103 SourceLocation Loc, DeclarationName Entity); 5104 5105 QualType SubstType(QualType T, 5106 const MultiLevelTemplateArgumentList &TemplateArgs, 5107 SourceLocation Loc, DeclarationName Entity); 5108 5109 TypeSourceInfo *SubstType(TypeLoc TL, 5110 const MultiLevelTemplateArgumentList &TemplateArgs, 5111 SourceLocation Loc, DeclarationName Entity); 5112 5113 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 5114 const MultiLevelTemplateArgumentList &TemplateArgs, 5115 SourceLocation Loc, 5116 DeclarationName Entity); 5117 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 5118 const MultiLevelTemplateArgumentList &TemplateArgs, 5119 int indexAdjustment, 5120 llvm::Optional<unsigned> NumExpansions, 5121 bool ExpectParameterPack); 5122 bool SubstParmTypes(SourceLocation Loc, 5123 ParmVarDecl **Params, unsigned NumParams, 5124 const MultiLevelTemplateArgumentList &TemplateArgs, 5125 SmallVectorImpl<QualType> &ParamTypes, 5126 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 5127 ExprResult SubstExpr(Expr *E, 5128 const MultiLevelTemplateArgumentList &TemplateArgs); 5129 5130 /// \brief Substitute the given template arguments into a list of 5131 /// expressions, expanding pack expansions if required. 5132 /// 5133 /// \param Exprs The list of expressions to substitute into. 5134 /// 5135 /// \param NumExprs The number of expressions in \p Exprs. 5136 /// 5137 /// \param IsCall Whether this is some form of call, in which case 5138 /// default arguments will be dropped. 5139 /// 5140 /// \param TemplateArgs The set of template arguments to substitute. 5141 /// 5142 /// \param Outputs Will receive all of the substituted arguments. 5143 /// 5144 /// \returns true if an error occurred, false otherwise. 5145 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 5146 const MultiLevelTemplateArgumentList &TemplateArgs, 5147 SmallVectorImpl<Expr *> &Outputs); 5148 5149 StmtResult SubstStmt(Stmt *S, 5150 const MultiLevelTemplateArgumentList &TemplateArgs); 5151 5152 Decl *SubstDecl(Decl *D, DeclContext *Owner, 5153 const MultiLevelTemplateArgumentList &TemplateArgs); 5154 5155 bool 5156 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 5157 CXXRecordDecl *Pattern, 5158 const MultiLevelTemplateArgumentList &TemplateArgs); 5159 5160 bool 5161 InstantiateClass(SourceLocation PointOfInstantiation, 5162 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 5163 const MultiLevelTemplateArgumentList &TemplateArgs, 5164 TemplateSpecializationKind TSK, 5165 bool Complain = true); 5166 5167 struct LateInstantiatedAttribute { 5168 const Attr *TmplAttr; 5169 LocalInstantiationScope *Scope; 5170 Decl *NewDecl; 5171 5172 LateInstantiatedAttribute(const Attr *A, LocalInstantiationScope *S, 5173 Decl *D) 5174 : TmplAttr(A), Scope(S), NewDecl(D) 5175 { } 5176 }; 5177 typedef SmallVector<LateInstantiatedAttribute, 16> LateInstantiatedAttrVec; 5178 5179 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 5180 const Decl *Pattern, Decl *Inst, 5181 LateInstantiatedAttrVec *LateAttrs = 0, 5182 LocalInstantiationScope *OuterMostScope = 0); 5183 5184 bool 5185 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 5186 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5187 TemplateSpecializationKind TSK, 5188 bool Complain = true); 5189 5190 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 5191 CXXRecordDecl *Instantiation, 5192 const MultiLevelTemplateArgumentList &TemplateArgs, 5193 TemplateSpecializationKind TSK); 5194 5195 void InstantiateClassTemplateSpecializationMembers( 5196 SourceLocation PointOfInstantiation, 5197 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5198 TemplateSpecializationKind TSK); 5199 5200 NestedNameSpecifierLoc 5201 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 5202 const MultiLevelTemplateArgumentList &TemplateArgs); 5203 5204 DeclarationNameInfo 5205 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 5206 const MultiLevelTemplateArgumentList &TemplateArgs); 5207 TemplateName 5208 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 5209 SourceLocation Loc, 5210 const MultiLevelTemplateArgumentList &TemplateArgs); 5211 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 5212 TemplateArgumentListInfo &Result, 5213 const MultiLevelTemplateArgumentList &TemplateArgs); 5214 5215 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 5216 FunctionDecl *Function, 5217 bool Recursive = false, 5218 bool DefinitionRequired = false); 5219 void InstantiateStaticDataMemberDefinition( 5220 SourceLocation PointOfInstantiation, 5221 VarDecl *Var, 5222 bool Recursive = false, 5223 bool DefinitionRequired = false); 5224 5225 void InstantiateMemInitializers(CXXConstructorDecl *New, 5226 const CXXConstructorDecl *Tmpl, 5227 const MultiLevelTemplateArgumentList &TemplateArgs); 5228 bool InstantiateInitializer(Expr *Init, 5229 const MultiLevelTemplateArgumentList &TemplateArgs, 5230 SourceLocation &LParenLoc, 5231 ASTOwningVector<Expr*> &NewArgs, 5232 SourceLocation &RParenLoc); 5233 5234 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 5235 const MultiLevelTemplateArgumentList &TemplateArgs); 5236 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 5237 const MultiLevelTemplateArgumentList &TemplateArgs); 5238 5239 // Objective-C declarations. 5240 enum ObjCContainerKind { 5241 OCK_None = -1, 5242 OCK_Interface = 0, 5243 OCK_Protocol, 5244 OCK_Category, 5245 OCK_ClassExtension, 5246 OCK_Implementation, 5247 OCK_CategoryImplementation 5248 }; 5249 ObjCContainerKind getObjCContainerKind() const; 5250 5251 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 5252 IdentifierInfo *ClassName, 5253 SourceLocation ClassLoc, 5254 IdentifierInfo *SuperName, 5255 SourceLocation SuperLoc, 5256 Decl * const *ProtoRefs, 5257 unsigned NumProtoRefs, 5258 const SourceLocation *ProtoLocs, 5259 SourceLocation EndProtoLoc, 5260 AttributeList *AttrList); 5261 5262 Decl *ActOnCompatiblityAlias( 5263 SourceLocation AtCompatibilityAliasLoc, 5264 IdentifierInfo *AliasName, SourceLocation AliasLocation, 5265 IdentifierInfo *ClassName, SourceLocation ClassLocation); 5266 5267 bool CheckForwardProtocolDeclarationForCircularDependency( 5268 IdentifierInfo *PName, 5269 SourceLocation &PLoc, SourceLocation PrevLoc, 5270 const ObjCList<ObjCProtocolDecl> &PList); 5271 5272 Decl *ActOnStartProtocolInterface( 5273 SourceLocation AtProtoInterfaceLoc, 5274 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 5275 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 5276 const SourceLocation *ProtoLocs, 5277 SourceLocation EndProtoLoc, 5278 AttributeList *AttrList); 5279 5280 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 5281 IdentifierInfo *ClassName, 5282 SourceLocation ClassLoc, 5283 IdentifierInfo *CategoryName, 5284 SourceLocation CategoryLoc, 5285 Decl * const *ProtoRefs, 5286 unsigned NumProtoRefs, 5287 const SourceLocation *ProtoLocs, 5288 SourceLocation EndProtoLoc); 5289 5290 Decl *ActOnStartClassImplementation( 5291 SourceLocation AtClassImplLoc, 5292 IdentifierInfo *ClassName, SourceLocation ClassLoc, 5293 IdentifierInfo *SuperClassname, 5294 SourceLocation SuperClassLoc); 5295 5296 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 5297 IdentifierInfo *ClassName, 5298 SourceLocation ClassLoc, 5299 IdentifierInfo *CatName, 5300 SourceLocation CatLoc); 5301 5302 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc, 5303 IdentifierInfo **IdentList, 5304 SourceLocation *IdentLocs, 5305 unsigned NumElts); 5306 5307 DeclGroupPtrTy ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 5308 const IdentifierLocPair *IdentList, 5309 unsigned NumElts, 5310 AttributeList *attrList); 5311 5312 void FindProtocolDeclaration(bool WarnOnDeclarations, 5313 const IdentifierLocPair *ProtocolId, 5314 unsigned NumProtocols, 5315 SmallVectorImpl<Decl *> &Protocols); 5316 5317 /// Ensure attributes are consistent with type. 5318 /// \param [in, out] Attributes The attributes to check; they will 5319 /// be modified to be consistent with \arg PropertyTy. 5320 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5321 SourceLocation Loc, 5322 unsigned &Attributes); 5323 5324 /// Process the specified property declaration and create decls for the 5325 /// setters and getters as needed. 5326 /// \param property The property declaration being processed 5327 /// \param DC The semantic container for the property 5328 /// \param redeclaredProperty Declaration for property if redeclared 5329 /// in class extension. 5330 /// \param lexicalDC Container for redeclaredProperty. 5331 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5332 ObjCContainerDecl *DC, 5333 ObjCPropertyDecl *redeclaredProperty = 0, 5334 ObjCContainerDecl *lexicalDC = 0); 5335 5336 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5337 ObjCPropertyDecl *SuperProperty, 5338 const IdentifierInfo *Name); 5339 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5340 5341 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5342 ObjCMethodDecl *MethodDecl, 5343 bool IsInstance); 5344 5345 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5346 5347 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5348 ObjCInterfaceDecl *ID); 5349 5350 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5351 ObjCProtocolDecl *PDecl); 5352 5353 Decl *ActOnAtEnd(Scope *S, SourceRange AtEnd, 5354 Decl **allMethods = 0, unsigned allNum = 0, 5355 Decl **allProperties = 0, unsigned pNum = 0, 5356 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5357 5358 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5359 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5360 Selector GetterSel, Selector SetterSel, 5361 bool *OverridingProperty, 5362 tok::ObjCKeywordKind MethodImplKind, 5363 DeclContext *lexicalDC = 0); 5364 5365 Decl *ActOnPropertyImplDecl(Scope *S, 5366 SourceLocation AtLoc, 5367 SourceLocation PropertyLoc, 5368 bool ImplKind, 5369 IdentifierInfo *PropertyId, 5370 IdentifierInfo *PropertyIvar, 5371 SourceLocation PropertyIvarLoc); 5372 5373 enum ObjCSpecialMethodKind { 5374 OSMK_None, 5375 OSMK_Alloc, 5376 OSMK_New, 5377 OSMK_Copy, 5378 OSMK_RetainingInit, 5379 OSMK_NonRetainingInit 5380 }; 5381 5382 struct ObjCArgInfo { 5383 IdentifierInfo *Name; 5384 SourceLocation NameLoc; 5385 // The Type is null if no type was specified, and the DeclSpec is invalid 5386 // in this case. 5387 ParsedType Type; 5388 ObjCDeclSpec DeclSpec; 5389 5390 /// ArgAttrs - Attribute list for this argument. 5391 AttributeList *ArgAttrs; 5392 }; 5393 5394 Decl *ActOnMethodDeclaration( 5395 Scope *S, 5396 SourceLocation BeginLoc, // location of the + or -. 5397 SourceLocation EndLoc, // location of the ; or {. 5398 tok::TokenKind MethodType, 5399 ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5400 ArrayRef<SourceLocation> SelectorLocs, Selector Sel, 5401 // optional arguments. The number of types/arguments is obtained 5402 // from the Sel.getNumArgs(). 5403 ObjCArgInfo *ArgInfo, 5404 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5405 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5406 bool isVariadic, bool MethodDefinition); 5407 5408 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5409 // Will search "local" class/category implementations for a method decl. 5410 // Will also search in class's root looking for instance method. 5411 // Returns 0 if no method is found. 5412 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5413 ObjCInterfaceDecl *CDecl); 5414 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5415 ObjCInterfaceDecl *ClassDecl); 5416 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5417 const ObjCObjectPointerType *OPT, 5418 bool IsInstance); 5419 ObjCMethodDecl *LookupMethodInObjectType(Selector Sel, QualType Ty, 5420 bool IsInstance); 5421 5422 bool inferObjCARCLifetime(ValueDecl *decl); 5423 5424 ExprResult 5425 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5426 Expr *BaseExpr, 5427 SourceLocation OpLoc, 5428 DeclarationName MemberName, 5429 SourceLocation MemberLoc, 5430 SourceLocation SuperLoc, QualType SuperType, 5431 bool Super); 5432 5433 ExprResult 5434 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5435 IdentifierInfo &propertyName, 5436 SourceLocation receiverNameLoc, 5437 SourceLocation propertyNameLoc); 5438 5439 ObjCMethodDecl *tryCaptureObjCSelf(); 5440 5441 /// \brief Describes the kind of message expression indicated by a message 5442 /// send that starts with an identifier. 5443 enum ObjCMessageKind { 5444 /// \brief The message is sent to 'super'. 5445 ObjCSuperMessage, 5446 /// \brief The message is an instance message. 5447 ObjCInstanceMessage, 5448 /// \brief The message is a class message, and the identifier is a type 5449 /// name. 5450 ObjCClassMessage 5451 }; 5452 5453 ObjCMessageKind getObjCMessageKind(Scope *S, 5454 IdentifierInfo *Name, 5455 SourceLocation NameLoc, 5456 bool IsSuper, 5457 bool HasTrailingDot, 5458 ParsedType &ReceiverType); 5459 5460 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5461 Selector Sel, 5462 SourceLocation LBracLoc, 5463 ArrayRef<SourceLocation> SelectorLocs, 5464 SourceLocation RBracLoc, 5465 MultiExprArg Args); 5466 5467 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5468 QualType ReceiverType, 5469 SourceLocation SuperLoc, 5470 Selector Sel, 5471 ObjCMethodDecl *Method, 5472 SourceLocation LBracLoc, 5473 ArrayRef<SourceLocation> SelectorLocs, 5474 SourceLocation RBracLoc, 5475 MultiExprArg Args, 5476 bool isImplicit = false); 5477 5478 ExprResult BuildClassMessageImplicit(QualType ReceiverType, 5479 bool isSuperReceiver, 5480 SourceLocation Loc, 5481 Selector Sel, 5482 ObjCMethodDecl *Method, 5483 MultiExprArg Args); 5484 5485 ExprResult ActOnClassMessage(Scope *S, 5486 ParsedType Receiver, 5487 Selector Sel, 5488 SourceLocation LBracLoc, 5489 ArrayRef<SourceLocation> SelectorLocs, 5490 SourceLocation RBracLoc, 5491 MultiExprArg Args); 5492 5493 ExprResult BuildInstanceMessage(Expr *Receiver, 5494 QualType ReceiverType, 5495 SourceLocation SuperLoc, 5496 Selector Sel, 5497 ObjCMethodDecl *Method, 5498 SourceLocation LBracLoc, 5499 ArrayRef<SourceLocation> SelectorLocs, 5500 SourceLocation RBracLoc, 5501 MultiExprArg Args, 5502 bool isImplicit = false); 5503 5504 ExprResult BuildInstanceMessageImplicit(Expr *Receiver, 5505 QualType ReceiverType, 5506 SourceLocation Loc, 5507 Selector Sel, 5508 ObjCMethodDecl *Method, 5509 MultiExprArg Args); 5510 5511 ExprResult ActOnInstanceMessage(Scope *S, 5512 Expr *Receiver, 5513 Selector Sel, 5514 SourceLocation LBracLoc, 5515 ArrayRef<SourceLocation> SelectorLocs, 5516 SourceLocation RBracLoc, 5517 MultiExprArg Args); 5518 5519 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5520 ObjCBridgeCastKind Kind, 5521 SourceLocation BridgeKeywordLoc, 5522 TypeSourceInfo *TSInfo, 5523 Expr *SubExpr); 5524 5525 ExprResult ActOnObjCBridgedCast(Scope *S, 5526 SourceLocation LParenLoc, 5527 ObjCBridgeCastKind Kind, 5528 SourceLocation BridgeKeywordLoc, 5529 ParsedType Type, 5530 SourceLocation RParenLoc, 5531 Expr *SubExpr); 5532 5533 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5534 5535 /// \brief Check whether the given new method is a valid override of the 5536 /// given overridden method, and set any properties that should be inherited. 5537 void CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5538 const ObjCMethodDecl *Overridden, 5539 bool IsImplementation); 5540 5541 /// \brief Check whether the given method overrides any methods in its class, 5542 /// calling \c CheckObjCMethodOverride for each overridden method. 5543 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5544 5545 enum PragmaOptionsAlignKind { 5546 POAK_Native, // #pragma options align=native 5547 POAK_Natural, // #pragma options align=natural 5548 POAK_Packed, // #pragma options align=packed 5549 POAK_Power, // #pragma options align=power 5550 POAK_Mac68k, // #pragma options align=mac68k 5551 POAK_Reset // #pragma options align=reset 5552 }; 5553 5554 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5555 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5556 SourceLocation PragmaLoc, 5557 SourceLocation KindLoc); 5558 5559 enum PragmaPackKind { 5560 PPK_Default, // #pragma pack([n]) 5561 PPK_Show, // #pragma pack(show), only supported by MSVC. 5562 PPK_Push, // #pragma pack(push, [identifier], [n]) 5563 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5564 }; 5565 5566 enum PragmaMSStructKind { 5567 PMSST_OFF, // #pragms ms_struct off 5568 PMSST_ON // #pragms ms_struct on 5569 }; 5570 5571 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5572 void ActOnPragmaPack(PragmaPackKind Kind, 5573 IdentifierInfo *Name, 5574 Expr *Alignment, 5575 SourceLocation PragmaLoc, 5576 SourceLocation LParenLoc, 5577 SourceLocation RParenLoc); 5578 5579 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5580 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5581 5582 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5583 void ActOnPragmaUnused(const Token &Identifier, 5584 Scope *curScope, 5585 SourceLocation PragmaLoc); 5586 5587 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5588 void ActOnPragmaVisibility(const IdentifierInfo* VisType, 5589 SourceLocation PragmaLoc); 5590 5591 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II, 5592 SourceLocation Loc); 5593 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5594 5595 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5596 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5597 SourceLocation PragmaLoc, 5598 SourceLocation WeakNameLoc); 5599 5600 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5601 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5602 IdentifierInfo* AliasName, 5603 SourceLocation PragmaLoc, 5604 SourceLocation WeakNameLoc, 5605 SourceLocation AliasNameLoc); 5606 5607 /// ActOnPragmaFPContract - Called on well formed 5608 /// #pragma {STDC,OPENCL} FP_CONTRACT 5609 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5610 5611 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5612 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5613 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5614 5615 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5616 void AddMsStructLayoutForRecord(RecordDecl *RD); 5617 5618 /// FreePackedContext - Deallocate and null out PackContext. 5619 void FreePackedContext(); 5620 5621 /// PushNamespaceVisibilityAttr - Note that we've entered a 5622 /// namespace with a visibility attribute. 5623 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 5624 5625 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5626 /// add an appropriate visibility attribute. 5627 void AddPushedVisibilityAttribute(Decl *RD); 5628 5629 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5630 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5631 void PopPragmaVisibility(); 5632 5633 /// FreeVisContext - Deallocate and null out VisContext. 5634 void FreeVisContext(); 5635 5636 /// AddCFAuditedAttribute - Check whether we're currently within 5637 /// '#pragma clang arc_cf_code_audited' and, if so, consider adding 5638 /// the appropriate attribute. 5639 void AddCFAuditedAttribute(Decl *D); 5640 5641 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5642 void AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E); 5643 void AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *T); 5644 5645 /// \brief The kind of conversion being performed. 5646 enum CheckedConversionKind { 5647 /// \brief An implicit conversion. 5648 CCK_ImplicitConversion, 5649 /// \brief A C-style cast. 5650 CCK_CStyleCast, 5651 /// \brief A functional-style cast. 5652 CCK_FunctionalCast, 5653 /// \brief A cast other than a C-style cast. 5654 CCK_OtherCast 5655 }; 5656 5657 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5658 /// cast. If there is already an implicit cast, merge into the existing one. 5659 /// If isLvalue, the result of the cast is an lvalue. 5660 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5661 ExprValueKind VK = VK_RValue, 5662 const CXXCastPath *BasePath = 0, 5663 CheckedConversionKind CCK 5664 = CCK_ImplicitConversion); 5665 5666 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5667 /// to the conversion from scalar type ScalarTy to the Boolean type. 5668 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5669 5670 /// IgnoredValueConversions - Given that an expression's result is 5671 /// syntactically ignored, perform any conversions that are 5672 /// required. 5673 ExprResult IgnoredValueConversions(Expr *E); 5674 5675 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5676 // functions and arrays to their respective pointers (C99 6.3.2.1). 5677 ExprResult UsualUnaryConversions(Expr *E); 5678 5679 // DefaultFunctionArrayConversion - converts functions and arrays 5680 // to their respective pointers (C99 6.3.2.1). 5681 ExprResult DefaultFunctionArrayConversion(Expr *E); 5682 5683 // DefaultFunctionArrayLvalueConversion - converts functions and 5684 // arrays to their respective pointers and performs the 5685 // lvalue-to-rvalue conversion. 5686 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5687 5688 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5689 // the operand. This is DefaultFunctionArrayLvalueConversion, 5690 // except that it assumes the operand isn't of function or array 5691 // type. 5692 ExprResult DefaultLvalueConversion(Expr *E); 5693 5694 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5695 // do not have a prototype. Integer promotions are performed on each 5696 // argument, and arguments that have type float are promoted to double. 5697 ExprResult DefaultArgumentPromotion(Expr *E); 5698 5699 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5700 enum VariadicCallType { 5701 VariadicFunction, 5702 VariadicBlock, 5703 VariadicMethod, 5704 VariadicConstructor, 5705 VariadicDoesNotApply 5706 }; 5707 5708 /// GatherArgumentsForCall - Collector argument expressions for various 5709 /// form of call prototypes. 5710 bool GatherArgumentsForCall(SourceLocation CallLoc, 5711 FunctionDecl *FDecl, 5712 const FunctionProtoType *Proto, 5713 unsigned FirstProtoArg, 5714 Expr **Args, unsigned NumArgs, 5715 SmallVector<Expr *, 8> &AllArgs, 5716 VariadicCallType CallType = VariadicDoesNotApply); 5717 5718 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5719 // will warn if the resulting type is not a POD type. 5720 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5721 FunctionDecl *FDecl); 5722 5723 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5724 // operands and then handles various conversions that are common to binary 5725 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5726 // routine returns the first non-arithmetic type found. The client is 5727 // responsible for emitting appropriate error diagnostics. 5728 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS, 5729 bool IsCompAssign = false); 5730 5731 /// AssignConvertType - All of the 'assignment' semantic checks return this 5732 /// enum to indicate whether the assignment was allowed. These checks are 5733 /// done for simple assignments, as well as initialization, return from 5734 /// function, argument passing, etc. The query is phrased in terms of a 5735 /// source and destination type. 5736 enum AssignConvertType { 5737 /// Compatible - the types are compatible according to the standard. 5738 Compatible, 5739 5740 /// PointerToInt - The assignment converts a pointer to an int, which we 5741 /// accept as an extension. 5742 PointerToInt, 5743 5744 /// IntToPointer - The assignment converts an int to a pointer, which we 5745 /// accept as an extension. 5746 IntToPointer, 5747 5748 /// FunctionVoidPointer - The assignment is between a function pointer and 5749 /// void*, which the standard doesn't allow, but we accept as an extension. 5750 FunctionVoidPointer, 5751 5752 /// IncompatiblePointer - The assignment is between two pointers types that 5753 /// are not compatible, but we accept them as an extension. 5754 IncompatiblePointer, 5755 5756 /// IncompatiblePointer - The assignment is between two pointers types which 5757 /// point to integers which have a different sign, but are otherwise 5758 /// identical. This is a subset of the above, but broken out because it's by 5759 /// far the most common case of incompatible pointers. 5760 IncompatiblePointerSign, 5761 5762 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5763 /// c/v/r qualifiers, which we accept as an extension. 5764 CompatiblePointerDiscardsQualifiers, 5765 5766 /// IncompatiblePointerDiscardsQualifiers - The assignment 5767 /// discards qualifiers that we don't permit to be discarded, 5768 /// like address spaces. 5769 IncompatiblePointerDiscardsQualifiers, 5770 5771 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5772 /// nested pointer types, and the qualifiers other than the first two 5773 /// levels differ e.g. char ** -> const char **, but we accept them as an 5774 /// extension. 5775 IncompatibleNestedPointerQualifiers, 5776 5777 /// IncompatibleVectors - The assignment is between two vector types that 5778 /// have the same size, which we accept as an extension. 5779 IncompatibleVectors, 5780 5781 /// IntToBlockPointer - The assignment converts an int to a block 5782 /// pointer. We disallow this. 5783 IntToBlockPointer, 5784 5785 /// IncompatibleBlockPointer - The assignment is between two block 5786 /// pointers types that are not compatible. 5787 IncompatibleBlockPointer, 5788 5789 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5790 /// id type and something else (that is incompatible with it). For example, 5791 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5792 IncompatibleObjCQualifiedId, 5793 5794 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 5795 /// object with __weak qualifier. 5796 IncompatibleObjCWeakRef, 5797 5798 /// Incompatible - We reject this conversion outright, it is invalid to 5799 /// represent it in the AST. 5800 Incompatible 5801 }; 5802 5803 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5804 /// assignment conversion type specified by ConvTy. This returns true if the 5805 /// conversion was invalid or false if the conversion was accepted. 5806 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5807 SourceLocation Loc, 5808 QualType DstType, QualType SrcType, 5809 Expr *SrcExpr, AssignmentAction Action, 5810 bool *Complained = 0); 5811 5812 /// CheckAssignmentConstraints - Perform type checking for assignment, 5813 /// argument passing, variable initialization, and function return values. 5814 /// C99 6.5.16. 5815 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5816 QualType LHSType, 5817 QualType RHSType); 5818 5819 /// Check assignment constraints and prepare for a conversion of the 5820 /// RHS to the LHS type. 5821 AssignConvertType CheckAssignmentConstraints(QualType LHSType, 5822 ExprResult &RHS, 5823 CastKind &Kind); 5824 5825 // CheckSingleAssignmentConstraints - Currently used by 5826 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5827 // this routine performs the default function/array converions. 5828 AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType, 5829 ExprResult &RHS, 5830 bool Diagnose = true); 5831 5832 // \brief If the lhs type is a transparent union, check whether we 5833 // can initialize the transparent union with the given expression. 5834 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType, 5835 ExprResult &RHS); 5836 5837 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5838 5839 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5840 5841 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5842 AssignmentAction Action, 5843 bool AllowExplicit = false); 5844 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5845 AssignmentAction Action, 5846 bool AllowExplicit, 5847 ImplicitConversionSequence& ICS); 5848 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5849 const ImplicitConversionSequence& ICS, 5850 AssignmentAction Action, 5851 CheckedConversionKind CCK 5852 = CCK_ImplicitConversion); 5853 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5854 const StandardConversionSequence& SCS, 5855 AssignmentAction Action, 5856 CheckedConversionKind CCK); 5857 5858 /// the following "Check" methods will return a valid/converted QualType 5859 /// or a null QualType (indicating an error diagnostic was issued). 5860 5861 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5862 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS, 5863 ExprResult &RHS); 5864 QualType CheckPointerToMemberOperands( // C++ 5.5 5865 ExprResult &LHS, ExprResult &RHS, ExprValueKind &VK, 5866 SourceLocation OpLoc, bool isIndirect); 5867 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5868 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign, 5869 bool IsDivide); 5870 QualType CheckRemainderOperands( // C99 6.5.5 5871 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5872 bool IsCompAssign = false); 5873 QualType CheckAdditionOperands( // C99 6.5.6 5874 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5875 QualType* CompLHSTy = 0); 5876 QualType CheckSubtractionOperands( // C99 6.5.6 5877 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5878 QualType* CompLHSTy = 0); 5879 QualType CheckShiftOperands( // C99 6.5.7 5880 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 5881 bool IsCompAssign = false); 5882 QualType CheckCompareOperands( // C99 6.5.8/9 5883 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned OpaqueOpc, 5884 bool isRelational); 5885 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 5886 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5887 bool IsCompAssign = false); 5888 QualType CheckLogicalOperands( // C99 6.5.[13,14] 5889 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc); 5890 // CheckAssignmentOperands is used for both simple and compound assignment. 5891 // For simple assignment, pass both expressions and a null converted type. 5892 // For compound assignment, pass both expressions and the converted type. 5893 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 5894 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType); 5895 5896 ExprResult checkPseudoObjectIncDec(Scope *S, SourceLocation OpLoc, 5897 UnaryOperatorKind Opcode, Expr *Op); 5898 ExprResult checkPseudoObjectAssignment(Scope *S, SourceLocation OpLoc, 5899 BinaryOperatorKind Opcode, 5900 Expr *LHS, Expr *RHS); 5901 ExprResult checkPseudoObjectRValue(Expr *E); 5902 Expr *recreateSyntacticForm(PseudoObjectExpr *E); 5903 5904 QualType CheckConditionalOperands( // C99 6.5.15 5905 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS, 5906 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc); 5907 QualType CXXCheckConditionalOperands( // C++ 5.16 5908 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5909 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5910 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 5911 bool *NonStandardCompositeType = 0); 5912 QualType FindCompositePointerType(SourceLocation Loc, 5913 ExprResult &E1, ExprResult &E2, 5914 bool *NonStandardCompositeType = 0) { 5915 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 5916 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, 5917 NonStandardCompositeType); 5918 E1 = Owned(E1Tmp); 5919 E2 = Owned(E2Tmp); 5920 return Composite; 5921 } 5922 5923 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5924 SourceLocation QuestionLoc); 5925 5926 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr, 5927 SourceLocation QuestionLoc); 5928 5929 /// type checking for vector binary operators. 5930 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS, 5931 SourceLocation Loc, bool IsCompAssign); 5932 QualType GetSignedVectorType(QualType V); 5933 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS, 5934 SourceLocation Loc, bool isRelational); 5935 QualType CheckVectorLogicalOperands(ExprResult &LHS, ExprResult &RHS, 5936 SourceLocation Loc); 5937 5938 /// type checking declaration initializers (C99 6.7.8) 5939 bool CheckForConstantInitializer(Expr *e, QualType t); 5940 5941 // type checking C++ declaration initializers (C++ [dcl.init]). 5942 5943 /// ReferenceCompareResult - Expresses the result of comparing two 5944 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5945 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5946 enum ReferenceCompareResult { 5947 /// Ref_Incompatible - The two types are incompatible, so direct 5948 /// reference binding is not possible. 5949 Ref_Incompatible = 0, 5950 /// Ref_Related - The two types are reference-related, which means 5951 /// that their unqualified forms (T1 and T2) are either the same 5952 /// or T1 is a base class of T2. 5953 Ref_Related, 5954 /// Ref_Compatible_With_Added_Qualification - The two types are 5955 /// reference-compatible with added qualification, meaning that 5956 /// they are reference-compatible and the qualifiers on T1 (cv1) 5957 /// are greater than the qualifiers on T2 (cv2). 5958 Ref_Compatible_With_Added_Qualification, 5959 /// Ref_Compatible - The two types are reference-compatible and 5960 /// have equivalent qualifiers (cv1 == cv2). 5961 Ref_Compatible 5962 }; 5963 5964 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 5965 QualType T1, QualType T2, 5966 bool &DerivedToBase, 5967 bool &ObjCConversion, 5968 bool &ObjCLifetimeConversion); 5969 5970 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType, 5971 Expr *CastExpr, CastKind &CastKind, 5972 ExprValueKind &VK, CXXCastPath &Path); 5973 5974 /// \brief Force an expression with unknown-type to an expression of the 5975 /// given type. 5976 ExprResult forceUnknownAnyToType(Expr *E, QualType ToType); 5977 5978 // CheckVectorCast - check type constraints for vectors. 5979 // Since vectors are an extension, there are no C standard reference for this. 5980 // We allow casting between vectors and integer datatypes of the same size. 5981 // returns true if the cast is invalid 5982 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 5983 CastKind &Kind); 5984 5985 // CheckExtVectorCast - check type constraints for extended vectors. 5986 // Since vectors are an extension, there are no C standard reference for this. 5987 // We allow casting between vectors and integer datatypes of the same size, 5988 // or vectors and the element type of that vector. 5989 // returns the cast expr 5990 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr, 5991 CastKind &Kind); 5992 5993 ExprResult BuildCXXFunctionalCastExpr(TypeSourceInfo *TInfo, 5994 SourceLocation LParenLoc, 5995 Expr *CastExpr, 5996 SourceLocation RParenLoc); 5997 5998 enum ARCConversionResult { ACR_okay, ACR_unbridged }; 5999 6000 /// \brief Checks for invalid conversions and casts between 6001 /// retainable pointers and other pointer kinds. 6002 ARCConversionResult CheckObjCARCConversion(SourceRange castRange, 6003 QualType castType, Expr *&op, 6004 CheckedConversionKind CCK); 6005 6006 Expr *stripARCUnbridgedCast(Expr *e); 6007 void diagnoseARCUnbridgedCast(Expr *e); 6008 6009 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 6010 QualType ExprType); 6011 6012 /// checkRetainCycles - Check whether an Objective-C message send 6013 /// might create an obvious retain cycle. 6014 void checkRetainCycles(ObjCMessageExpr *msg); 6015 void checkRetainCycles(Expr *receiver, Expr *argument); 6016 6017 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 6018 /// to weak/__unsafe_unretained type. 6019 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 6020 6021 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 6022 /// to weak/__unsafe_unretained expression. 6023 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 6024 6025 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 6026 /// \param Method - May be null. 6027 /// \param [out] ReturnType - The return type of the send. 6028 /// \return true iff there were any incompatible types. 6029 bool CheckMessageArgumentTypes(QualType ReceiverType, 6030 Expr **Args, unsigned NumArgs, Selector Sel, 6031 ObjCMethodDecl *Method, bool isClassMessage, 6032 bool isSuperMessage, 6033 SourceLocation lbrac, SourceLocation rbrac, 6034 QualType &ReturnType, ExprValueKind &VK); 6035 6036 /// \brief Determine the result of a message send expression based on 6037 /// the type of the receiver, the method expected to receive the message, 6038 /// and the form of the message send. 6039 QualType getMessageSendResultType(QualType ReceiverType, 6040 ObjCMethodDecl *Method, 6041 bool isClassMessage, bool isSuperMessage); 6042 6043 /// \brief If the given expression involves a message send to a method 6044 /// with a related result type, emit a note describing what happened. 6045 void EmitRelatedResultTypeNote(const Expr *E); 6046 6047 /// CheckBooleanCondition - Diagnose problems involving the use of 6048 /// the given expression as a boolean condition (e.g. in an if 6049 /// statement). Also performs the standard function and array 6050 /// decays, possibly changing the input variable. 6051 /// 6052 /// \param Loc - A location associated with the condition, e.g. the 6053 /// 'if' keyword. 6054 /// \return true iff there were any errors 6055 ExprResult CheckBooleanCondition(Expr *E, SourceLocation Loc); 6056 6057 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 6058 Expr *SubExpr); 6059 6060 /// DiagnoseAssignmentAsCondition - Given that an expression is 6061 /// being used as a boolean condition, warn if it's an assignment. 6062 void DiagnoseAssignmentAsCondition(Expr *E); 6063 6064 /// \brief Redundant parentheses over an equality comparison can indicate 6065 /// that the user intended an assignment used as condition. 6066 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE); 6067 6068 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 6069 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 6070 6071 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 6072 /// the specified width and sign. If an overflow occurs, detect it and emit 6073 /// the specified diagnostic. 6074 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 6075 unsigned NewWidth, bool NewSign, 6076 SourceLocation Loc, unsigned DiagID); 6077 6078 /// Checks that the Objective-C declaration is declared in the global scope. 6079 /// Emits an error and marks the declaration as invalid if it's not declared 6080 /// in the global scope. 6081 bool CheckObjCDeclScope(Decl *D); 6082 6083 /// VerifyIntegerConstantExpression - Verifies that an expression is an ICE, 6084 /// and reports the appropriate diagnostics. Returns false on success. 6085 /// Can optionally return the value of the expression. 6086 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0, 6087 unsigned DiagId = 0, 6088 bool AllowFold = true); 6089 6090 /// VerifyBitField - verifies that a bit field expression is an ICE and has 6091 /// the correct width, and that the field type is valid. 6092 /// Returns false on success. 6093 /// Can optionally return whether the bit-field is of width 0 6094 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 6095 QualType FieldTy, const Expr *BitWidth, 6096 bool *ZeroWidth = 0); 6097 6098 enum CUDAFunctionTarget { 6099 CFT_Device, 6100 CFT_Global, 6101 CFT_Host, 6102 CFT_HostDevice 6103 }; 6104 6105 CUDAFunctionTarget IdentifyCUDATarget(const FunctionDecl *D); 6106 6107 bool CheckCUDATarget(CUDAFunctionTarget CallerTarget, 6108 CUDAFunctionTarget CalleeTarget); 6109 6110 bool CheckCUDATarget(const FunctionDecl *Caller, const FunctionDecl *Callee) { 6111 return CheckCUDATarget(IdentifyCUDATarget(Caller), 6112 IdentifyCUDATarget(Callee)); 6113 } 6114 6115 /// \name Code completion 6116 //@{ 6117 /// \brief Describes the context in which code completion occurs. 6118 enum ParserCompletionContext { 6119 /// \brief Code completion occurs at top-level or namespace context. 6120 PCC_Namespace, 6121 /// \brief Code completion occurs within a class, struct, or union. 6122 PCC_Class, 6123 /// \brief Code completion occurs within an Objective-C interface, protocol, 6124 /// or category. 6125 PCC_ObjCInterface, 6126 /// \brief Code completion occurs within an Objective-C implementation or 6127 /// category implementation 6128 PCC_ObjCImplementation, 6129 /// \brief Code completion occurs within the list of instance variables 6130 /// in an Objective-C interface, protocol, category, or implementation. 6131 PCC_ObjCInstanceVariableList, 6132 /// \brief Code completion occurs following one or more template 6133 /// headers. 6134 PCC_Template, 6135 /// \brief Code completion occurs following one or more template 6136 /// headers within a class. 6137 PCC_MemberTemplate, 6138 /// \brief Code completion occurs within an expression. 6139 PCC_Expression, 6140 /// \brief Code completion occurs within a statement, which may 6141 /// also be an expression or a declaration. 6142 PCC_Statement, 6143 /// \brief Code completion occurs at the beginning of the 6144 /// initialization statement (or expression) in a for loop. 6145 PCC_ForInit, 6146 /// \brief Code completion occurs within the condition of an if, 6147 /// while, switch, or for statement. 6148 PCC_Condition, 6149 /// \brief Code completion occurs within the body of a function on a 6150 /// recovery path, where we do not have a specific handle on our position 6151 /// in the grammar. 6152 PCC_RecoveryInFunction, 6153 /// \brief Code completion occurs where only a type is permitted. 6154 PCC_Type, 6155 /// \brief Code completion occurs in a parenthesized expression, which 6156 /// might also be a type cast. 6157 PCC_ParenthesizedExpression, 6158 /// \brief Code completion occurs within a sequence of declaration 6159 /// specifiers within a function, method, or block. 6160 PCC_LocalDeclarationSpecifiers 6161 }; 6162 6163 void CodeCompleteModuleImport(SourceLocation ImportLoc, ModuleIdPath Path); 6164 void CodeCompleteOrdinaryName(Scope *S, 6165 ParserCompletionContext CompletionContext); 6166 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 6167 bool AllowNonIdentifiers, 6168 bool AllowNestedNameSpecifiers); 6169 6170 struct CodeCompleteExpressionData; 6171 void CodeCompleteExpression(Scope *S, 6172 const CodeCompleteExpressionData &Data); 6173 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 6174 SourceLocation OpLoc, 6175 bool IsArrow); 6176 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 6177 void CodeCompleteTag(Scope *S, unsigned TagSpec); 6178 void CodeCompleteTypeQualifiers(DeclSpec &DS); 6179 void CodeCompleteCase(Scope *S); 6180 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 6181 void CodeCompleteInitializer(Scope *S, Decl *D); 6182 void CodeCompleteReturn(Scope *S); 6183 void CodeCompleteAfterIf(Scope *S); 6184 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 6185 6186 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 6187 bool EnteringContext); 6188 void CodeCompleteUsing(Scope *S); 6189 void CodeCompleteUsingDirective(Scope *S); 6190 void CodeCompleteNamespaceDecl(Scope *S); 6191 void CodeCompleteNamespaceAliasDecl(Scope *S); 6192 void CodeCompleteOperatorName(Scope *S); 6193 void CodeCompleteConstructorInitializer(Decl *Constructor, 6194 CXXCtorInitializer** Initializers, 6195 unsigned NumInitializers); 6196 6197 void CodeCompleteObjCAtDirective(Scope *S); 6198 void CodeCompleteObjCAtVisibility(Scope *S); 6199 void CodeCompleteObjCAtStatement(Scope *S); 6200 void CodeCompleteObjCAtExpression(Scope *S); 6201 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 6202 void CodeCompleteObjCPropertyGetter(Scope *S); 6203 void CodeCompleteObjCPropertySetter(Scope *S); 6204 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 6205 bool IsParameter); 6206 void CodeCompleteObjCMessageReceiver(Scope *S); 6207 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 6208 IdentifierInfo **SelIdents, 6209 unsigned NumSelIdents, 6210 bool AtArgumentExpression); 6211 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 6212 IdentifierInfo **SelIdents, 6213 unsigned NumSelIdents, 6214 bool AtArgumentExpression, 6215 bool IsSuper = false); 6216 void CodeCompleteObjCInstanceMessage(Scope *S, Expr *Receiver, 6217 IdentifierInfo **SelIdents, 6218 unsigned NumSelIdents, 6219 bool AtArgumentExpression, 6220 ObjCInterfaceDecl *Super = 0); 6221 void CodeCompleteObjCForCollection(Scope *S, 6222 DeclGroupPtrTy IterationVar); 6223 void CodeCompleteObjCSelector(Scope *S, 6224 IdentifierInfo **SelIdents, 6225 unsigned NumSelIdents); 6226 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 6227 unsigned NumProtocols); 6228 void CodeCompleteObjCProtocolDecl(Scope *S); 6229 void CodeCompleteObjCInterfaceDecl(Scope *S); 6230 void CodeCompleteObjCSuperclass(Scope *S, 6231 IdentifierInfo *ClassName, 6232 SourceLocation ClassNameLoc); 6233 void CodeCompleteObjCImplementationDecl(Scope *S); 6234 void CodeCompleteObjCInterfaceCategory(Scope *S, 6235 IdentifierInfo *ClassName, 6236 SourceLocation ClassNameLoc); 6237 void CodeCompleteObjCImplementationCategory(Scope *S, 6238 IdentifierInfo *ClassName, 6239 SourceLocation ClassNameLoc); 6240 void CodeCompleteObjCPropertyDefinition(Scope *S); 6241 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 6242 IdentifierInfo *PropertyName); 6243 void CodeCompleteObjCMethodDecl(Scope *S, 6244 bool IsInstanceMethod, 6245 ParsedType ReturnType); 6246 void CodeCompleteObjCMethodDeclSelector(Scope *S, 6247 bool IsInstanceMethod, 6248 bool AtParameterName, 6249 ParsedType ReturnType, 6250 IdentifierInfo **SelIdents, 6251 unsigned NumSelIdents); 6252 void CodeCompletePreprocessorDirective(bool InConditional); 6253 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 6254 void CodeCompletePreprocessorMacroName(bool IsDefinition); 6255 void CodeCompletePreprocessorExpression(); 6256 void CodeCompletePreprocessorMacroArgument(Scope *S, 6257 IdentifierInfo *Macro, 6258 MacroInfo *MacroInfo, 6259 unsigned Argument); 6260 void CodeCompleteNaturalLanguage(); 6261 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 6262 SmallVectorImpl<CodeCompletionResult> &Results); 6263 //@} 6264 6265 //===--------------------------------------------------------------------===// 6266 // Extra semantic analysis beyond the C type system 6267 6268public: 6269 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 6270 unsigned ByteNo) const; 6271 6272private: 6273 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr, 6274 const ArraySubscriptExpr *ASE=0, 6275 bool AllowOnePastEnd=true, bool IndexNegated=false); 6276 void CheckArrayAccess(const Expr *E); 6277 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 6278 bool CheckObjCMethodCall(ObjCMethodDecl *Method, SourceLocation loc, 6279 Expr **Args, unsigned NumArgs); 6280 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 6281 6282 bool CheckObjCString(Expr *Arg); 6283 6284 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6285 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6286 6287 bool SemaBuiltinVAStart(CallExpr *TheCall); 6288 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 6289 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 6290 6291public: 6292 // Used by C++ template instantiation. 6293 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 6294 6295private: 6296 bool SemaBuiltinPrefetch(CallExpr *TheCall); 6297 bool SemaBuiltinObjectSize(CallExpr *TheCall); 6298 bool SemaBuiltinLongjmp(CallExpr *TheCall); 6299 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 6300 ExprResult SemaAtomicOpsOverloaded(ExprResult TheCallResult, 6301 AtomicExpr::AtomicOp Op); 6302 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 6303 llvm::APSInt &Result); 6304 6305 enum FormatStringType { 6306 FST_Scanf, 6307 FST_Printf, 6308 FST_NSString, 6309 FST_Strftime, 6310 FST_Strfmon, 6311 FST_Kprintf, 6312 FST_Unknown 6313 }; 6314 static FormatStringType GetFormatStringType(const FormatAttr *Format); 6315 bool SemaCheckStringLiteral(const Expr *E, Expr **Args, unsigned NumArgs, 6316 bool HasVAListArg, unsigned format_idx, 6317 unsigned firstDataArg, FormatStringType Type, 6318 bool inFunctionCall = true); 6319 6320 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 6321 Expr **Args, unsigned NumArgs, bool HasVAListArg, 6322 unsigned format_idx, unsigned firstDataArg, 6323 FormatStringType Type, bool inFunctionCall); 6324 6325 void CheckFormatArguments(const FormatAttr *Format, CallExpr *TheCall); 6326 void CheckFormatArguments(const FormatAttr *Format, Expr **Args, 6327 unsigned NumArgs, bool IsCXXMember, 6328 SourceLocation Loc, SourceRange Range); 6329 void CheckFormatArguments(Expr **Args, unsigned NumArgs, 6330 bool HasVAListArg, unsigned format_idx, 6331 unsigned firstDataArg, FormatStringType Type, 6332 SourceLocation Loc, SourceRange range); 6333 6334 void CheckNonNullArguments(const NonNullAttr *NonNull, 6335 const Expr * const *ExprArgs, 6336 SourceLocation CallSiteLoc); 6337 6338 void CheckMemaccessArguments(const CallExpr *Call, 6339 unsigned BId, 6340 IdentifierInfo *FnName); 6341 6342 void CheckStrlcpycatArguments(const CallExpr *Call, 6343 IdentifierInfo *FnName); 6344 6345 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 6346 SourceLocation ReturnLoc); 6347 void CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr* RHS); 6348 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 6349 6350 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 6351 Expr *Init); 6352 6353 /// \brief The parser's current scope. 6354 /// 6355 /// The parser maintains this state here. 6356 Scope *CurScope; 6357 6358protected: 6359 friend class Parser; 6360 friend class InitializationSequence; 6361 friend class ASTReader; 6362 friend class ASTWriter; 6363 6364public: 6365 /// \brief Retrieve the parser's current scope. 6366 /// 6367 /// This routine must only be used when it is certain that semantic analysis 6368 /// and the parser are in precisely the same context, which is not the case 6369 /// when, e.g., we are performing any kind of template instantiation. 6370 /// Therefore, the only safe places to use this scope are in the parser 6371 /// itself and in routines directly invoked from the parser and *never* from 6372 /// template substitution or instantiation. 6373 Scope *getCurScope() const { return CurScope; } 6374 6375 Decl *getObjCDeclContext() const; 6376 6377 DeclContext *getCurLexicalContext() const { 6378 return OriginalLexicalContext ? OriginalLexicalContext : CurContext; 6379 } 6380 6381 AvailabilityResult getCurContextAvailability() const; 6382}; 6383 6384/// \brief RAII object that enters a new expression evaluation context. 6385class EnterExpressionEvaluationContext { 6386 Sema &Actions; 6387 6388public: 6389 EnterExpressionEvaluationContext(Sema &Actions, 6390 Sema::ExpressionEvaluationContext NewContext) 6391 : Actions(Actions) { 6392 Actions.PushExpressionEvaluationContext(NewContext); 6393 } 6394 6395 ~EnterExpressionEvaluationContext() { 6396 Actions.PopExpressionEvaluationContext(); 6397 } 6398}; 6399 6400} // end namespace clang 6401 6402#endif 6403