Sema.h revision 76e3da57b0e8cf72d221f44d54566ef206341668
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 llvm::SmallPtrSet<Expr*, 8> MaybeODRUseExprs; 237 238 /// \brief Stack containing information about each of the nested 239 /// function, block, and method scopes that are currently active. 240 /// 241 /// This array is never empty. Clients should ignore the first 242 /// element, which is used to cache a single FunctionScopeInfo 243 /// that's used to parse every top-level function. 244 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 245 246 typedef LazyVector<TypedefNameDecl *, ExternalSemaSource, 247 &ExternalSemaSource::ReadExtVectorDecls, 2, 2> 248 ExtVectorDeclsType; 249 250 /// ExtVectorDecls - This is a list all the extended vector types. This allows 251 /// us to associate a raw vector type with one of the ext_vector type names. 252 /// This is only necessary for issuing pretty diagnostics. 253 ExtVectorDeclsType ExtVectorDecls; 254 255 /// \brief The set of types for which we have already complained about the 256 /// definitions being hidden. 257 /// 258 /// This set is used to suppress redundant diagnostics. 259 llvm::SmallPtrSet<NamedDecl *, 4> HiddenDefinitions; 260 261 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 262 OwningPtr<CXXFieldCollector> FieldCollector; 263 264 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 265 266 /// PureVirtualClassDiagSet - a set of class declarations which we have 267 /// emitted a list of pure virtual functions. Used to prevent emitting the 268 /// same list more than once. 269 OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 270 271 /// ParsingInitForAutoVars - a set of declarations with auto types for which 272 /// we are currently parsing the initializer. 273 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 274 275 /// \brief A mapping from external names to the most recent 276 /// locally-scoped external declaration with that name. 277 /// 278 /// This map contains external declarations introduced in local 279 /// scoped, e.g., 280 /// 281 /// \code 282 /// void f() { 283 /// void foo(int, int); 284 /// } 285 /// \endcode 286 /// 287 /// Here, the name "foo" will be associated with the declaration on 288 /// "foo" within f. This name is not visible outside of 289 /// "f". However, we still find it in two cases: 290 /// 291 /// - If we are declaring another external with the name "foo", we 292 /// can find "foo" as a previous declaration, so that the types 293 /// of this external declaration can be checked for 294 /// compatibility. 295 /// 296 /// - If we would implicitly declare "foo" (e.g., due to a call to 297 /// "foo" in C when no prototype or definition is visible), then 298 /// we find this declaration of "foo" and complain that it is 299 /// not visible. 300 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 301 302 /// \brief Look for a locally scoped external declaration by the given name. 303 llvm::DenseMap<DeclarationName, NamedDecl *>::iterator 304 findLocallyScopedExternalDecl(DeclarationName Name); 305 306 typedef LazyVector<VarDecl *, ExternalSemaSource, 307 &ExternalSemaSource::ReadTentativeDefinitions, 2, 2> 308 TentativeDefinitionsType; 309 310 /// \brief All the tentative definitions encountered in the TU. 311 TentativeDefinitionsType TentativeDefinitions; 312 313 typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource, 314 &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2> 315 UnusedFileScopedDeclsType; 316 317 /// \brief The set of file scoped decls seen so far that have not been used 318 /// and must warn if not used. Only contains the first declaration. 319 UnusedFileScopedDeclsType UnusedFileScopedDecls; 320 321 typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource, 322 &ExternalSemaSource::ReadDelegatingConstructors, 2, 2> 323 DelegatingCtorDeclsType; 324 325 /// \brief All the delegating constructors seen so far in the file, used for 326 /// cycle detection at the end of the TU. 327 DelegatingCtorDeclsType DelegatingCtorDecls; 328 329 /// \brief All the overriding destructors seen during a class definition 330 /// (there could be multiple due to nested classes) that had their exception 331 /// spec checks delayed, plus the overridden destructor. 332 SmallVector<std::pair<const CXXDestructorDecl*, 333 const CXXDestructorDecl*>, 2> 334 DelayedDestructorExceptionSpecChecks; 335 336 /// \brief Callback to the parser to parse templated functions when needed. 337 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 338 LateTemplateParserCB *LateTemplateParser; 339 void *OpaqueParser; 340 341 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 342 LateTemplateParser = LTP; 343 OpaqueParser = P; 344 } 345 346 class DelayedDiagnostics; 347 348 class ParsingDeclState { 349 unsigned SavedStackSize; 350 friend class Sema::DelayedDiagnostics; 351 }; 352 353 class ProcessingContextState { 354 unsigned SavedParsingDepth; 355 unsigned SavedActiveStackBase; 356 friend class Sema::DelayedDiagnostics; 357 }; 358 359 /// A class which encapsulates the logic for delaying diagnostics 360 /// during parsing and other processing. 361 class DelayedDiagnostics { 362 /// \brief The stack of diagnostics that were delayed due to being 363 /// produced during the parsing of a declaration. 364 sema::DelayedDiagnostic *Stack; 365 366 /// \brief The number of objects on the delayed-diagnostics stack. 367 unsigned StackSize; 368 369 /// \brief The current capacity of the delayed-diagnostics stack. 370 unsigned StackCapacity; 371 372 /// \brief The index of the first "active" delayed diagnostic in 373 /// the stack. When parsing class definitions, we ignore active 374 /// delayed diagnostics from the surrounding context. 375 unsigned ActiveStackBase; 376 377 /// \brief The depth of the declarations we're currently parsing. 378 /// This gets saved and reset whenever we enter a class definition. 379 unsigned ParsingDepth; 380 381 public: 382 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 383 ActiveStackBase(0), ParsingDepth(0) {} 384 385 ~DelayedDiagnostics() { 386 delete[] reinterpret_cast<char*>(Stack); 387 } 388 389 /// Adds a delayed diagnostic. 390 void add(const sema::DelayedDiagnostic &diag); 391 392 /// Determines whether diagnostics should be delayed. 393 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 394 395 /// Observe that we've started parsing a declaration. Access and 396 /// deprecation diagnostics will be delayed; when the declaration 397 /// is completed, all active delayed diagnostics will be evaluated 398 /// in its context, and then active diagnostics stack will be 399 /// popped down to the saved depth. 400 ParsingDeclState pushParsingDecl() { 401 ParsingDepth++; 402 403 ParsingDeclState state; 404 state.SavedStackSize = StackSize; 405 return state; 406 } 407 408 /// Observe that we're completed parsing a declaration. 409 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 410 411 /// Observe that we've started processing a different context, the 412 /// contents of which are semantically separate from the 413 /// declarations it may lexically appear in. This sets aside the 414 /// current stack of active diagnostics and starts afresh. 415 ProcessingContextState pushContext() { 416 assert(StackSize >= ActiveStackBase); 417 418 ProcessingContextState state; 419 state.SavedParsingDepth = ParsingDepth; 420 state.SavedActiveStackBase = ActiveStackBase; 421 422 ActiveStackBase = StackSize; 423 ParsingDepth = 0; 424 425 return state; 426 } 427 428 /// Observe that we've stopped processing a context. This 429 /// restores the previous stack of active diagnostics. 430 void popContext(ProcessingContextState state) { 431 assert(ActiveStackBase == StackSize); 432 assert(ParsingDepth == 0); 433 ActiveStackBase = state.SavedActiveStackBase; 434 ParsingDepth = state.SavedParsingDepth; 435 } 436 } DelayedDiagnostics; 437 438 /// A RAII object to temporarily push a declaration context. 439 class ContextRAII { 440 private: 441 Sema &S; 442 DeclContext *SavedContext; 443 ProcessingContextState SavedContextState; 444 445 public: 446 ContextRAII(Sema &S, DeclContext *ContextToPush) 447 : S(S), SavedContext(S.CurContext), 448 SavedContextState(S.DelayedDiagnostics.pushContext()) 449 { 450 assert(ContextToPush && "pushing null context"); 451 S.CurContext = ContextToPush; 452 } 453 454 void pop() { 455 if (!SavedContext) return; 456 S.CurContext = SavedContext; 457 S.DelayedDiagnostics.popContext(SavedContextState); 458 SavedContext = 0; 459 } 460 461 ~ContextRAII() { 462 pop(); 463 } 464 }; 465 466 /// WeakUndeclaredIdentifiers - Identifiers contained in 467 /// #pragma weak before declared. rare. may alias another 468 /// identifier, declared or undeclared 469 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 470 471 /// \brief Load weak undeclared identifiers from the external source. 472 void LoadExternalWeakUndeclaredIdentifiers(); 473 474 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 475 /// #pragma weak during processing of other Decls. 476 /// I couldn't figure out a clean way to generate these in-line, so 477 /// we store them here and handle separately -- which is a hack. 478 /// It would be best to refactor this. 479 SmallVector<Decl*,2> WeakTopLevelDecl; 480 481 IdentifierResolver IdResolver; 482 483 /// Translation Unit Scope - useful to Objective-C actions that need 484 /// to lookup file scope declarations in the "ordinary" C decl namespace. 485 /// For example, user-defined classes, built-in "id" type, etc. 486 Scope *TUScope; 487 488 /// \brief The C++ "std" namespace, where the standard library resides. 489 LazyDeclPtr StdNamespace; 490 491 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 492 /// standard library. 493 LazyDeclPtr StdBadAlloc; 494 495 /// \brief The C++ "std::initializer_list" template, which is defined in 496 /// <initializer_list>. 497 ClassTemplateDecl *StdInitializerList; 498 499 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 500 RecordDecl *CXXTypeInfoDecl; 501 502 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 503 RecordDecl *MSVCGuidDecl; 504 505 /// A flag to remember whether the implicit forms of operator new and delete 506 /// have been declared. 507 bool GlobalNewDeleteDeclared; 508 509 510 /// A flag that is set when parsing a -dealloc method and no [super dealloc] 511 /// call was found yet. 512 bool ObjCShouldCallSuperDealloc; 513 /// A flag that is set when parsing a -finalize method and no [super finalize] 514 /// call was found yet. 515 bool ObjCShouldCallSuperFinalize; 516 517 /// \brief Describes how the expressions currently being parsed are 518 /// evaluated at run-time, if at all. 519 enum ExpressionEvaluationContext { 520 /// \brief The current expression and its subexpressions occur within an 521 /// unevaluated operand (C++11 [expr]p7), such as the subexpression of 522 /// \c sizeof, where the type of the expression may be significant but 523 /// no code will be generated to evaluate the value of the expression at 524 /// run time. 525 Unevaluated, 526 527 /// \brief The current context is "potentially evaluated" in C++11 terms, 528 /// but the expression is evaluated at compile-time (like the values of 529 /// cases in a switch statment). 530 ConstantEvaluated, 531 532 /// \brief The current expression is potentially evaluated at run time, 533 /// which means that code may be generated to evaluate the value of the 534 /// expression at run time. 535 PotentiallyEvaluated, 536 537 /// \brief The current expression is potentially evaluated, but any 538 /// declarations referenced inside that expression are only used if 539 /// in fact the current expression is used. 540 /// 541 /// This value is used when parsing default function arguments, for which 542 /// we would like to provide diagnostics (e.g., passing non-POD arguments 543 /// through varargs) but do not want to mark declarations as "referenced" 544 /// until the default argument is used. 545 PotentiallyEvaluatedIfUsed 546 }; 547 548 /// \brief Data structure used to record current or nested 549 /// expression evaluation contexts. 550 struct ExpressionEvaluationContextRecord { 551 /// \brief The expression evaluation context. 552 ExpressionEvaluationContext Context; 553 554 /// \brief Whether the enclosing context needed a cleanup. 555 bool ParentNeedsCleanups; 556 557 /// \brief The number of active cleanup objects when we entered 558 /// this expression evaluation context. 559 unsigned NumCleanupObjects; 560 561 llvm::SmallPtrSet<Expr*, 8> SavedMaybeODRUseExprs; 562 563 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 564 unsigned NumCleanupObjects, 565 bool ParentNeedsCleanups) 566 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups), 567 NumCleanupObjects(NumCleanupObjects) { } 568 }; 569 570 /// A stack of expression evaluation contexts. 571 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 572 573 /// SpecialMemberOverloadResult - The overloading result for a special member 574 /// function. 575 /// 576 /// This is basically a wrapper around PointerIntPair. The lowest bit of the 577 /// integer is used to determine whether we have a parameter qualification 578 /// match, the second-lowest is whether we had success in resolving the 579 /// overload to a unique non-deleted function. 580 /// 581 /// The ConstParamMatch bit represents whether, when looking up a copy 582 /// constructor or assignment operator, we found a potential copy 583 /// constructor/assignment operator whose first parameter is const-qualified. 584 /// This is used for determining parameter types of other objects and is 585 /// utterly meaningless on other types of special members. 586 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 587 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 588 public: 589 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 590 : FastFoldingSetNode(ID) 591 {} 592 593 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 594 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 595 596 bool hasSuccess() const { return Pair.getInt() & 0x1; } 597 void setSuccess(bool B) { 598 Pair.setInt(unsigned(B) | hasConstParamMatch() << 1); 599 } 600 601 bool hasConstParamMatch() const { return Pair.getInt() & 0x2; } 602 void setConstParamMatch(bool B) { 603 Pair.setInt(B << 1 | unsigned(hasSuccess())); 604 } 605 }; 606 607 /// \brief A cache of special member function overload resolution results 608 /// for C++ records. 609 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 610 611 /// \brief The kind of translation unit we are processing. 612 /// 613 /// When we're processing a complete translation unit, Sema will perform 614 /// end-of-translation-unit semantic tasks (such as creating 615 /// initializers for tentative definitions in C) once parsing has 616 /// completed. Modules and precompiled headers perform different kinds of 617 /// checks. 618 TranslationUnitKind TUKind; 619 620 llvm::BumpPtrAllocator BumpAlloc; 621 622 /// \brief The number of SFINAE diagnostics that have been trapped. 623 unsigned NumSFINAEErrors; 624 625 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> > 626 UnparsedDefaultArgInstantiationsMap; 627 628 /// \brief A mapping from parameters with unparsed default arguments to the 629 /// set of instantiations of each parameter. 630 /// 631 /// This mapping is a temporary data structure used when parsing 632 /// nested class templates or nested classes of class templates, 633 /// where we might end up instantiating an inner class before the 634 /// default arguments of its methods have been parsed. 635 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 636 637 // Contains the locations of the beginning of unparsed default 638 // argument locations. 639 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 640 641 /// UndefinedInternals - all the used, undefined objects with 642 /// internal linkage in this translation unit. 643 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 644 645 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 646 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 647 648 /// Method Pool - allows efficient lookup when typechecking messages to "id". 649 /// We need to maintain a list, since selectors can have differing signatures 650 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 651 /// of selectors are "overloaded"). 652 GlobalMethodPool MethodPool; 653 654 /// Method selectors used in a @selector expression. Used for implementation 655 /// of -Wselector. 656 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 657 658 void ReadMethodPool(Selector Sel); 659 660 /// Private Helper predicate to check for 'self'. 661 bool isSelfExpr(Expr *RExpr); 662public: 663 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 664 TranslationUnitKind TUKind = TU_Complete, 665 CodeCompleteConsumer *CompletionConsumer = 0); 666 ~Sema(); 667 668 /// \brief Perform initialization that occurs after the parser has been 669 /// initialized but before it parses anything. 670 void Initialize(); 671 672 const LangOptions &getLangOptions() const { return LangOpts; } 673 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 674 FPOptions &getFPOptions() { return FPFeatures; } 675 676 DiagnosticsEngine &getDiagnostics() const { return Diags; } 677 SourceManager &getSourceManager() const { return SourceMgr; } 678 const TargetAttributesSema &getTargetAttributesSema() const; 679 Preprocessor &getPreprocessor() const { return PP; } 680 ASTContext &getASTContext() const { return Context; } 681 ASTConsumer &getASTConsumer() const { return Consumer; } 682 ASTMutationListener *getASTMutationListener() const; 683 684 void PrintStats() const; 685 686 /// \brief Helper class that creates diagnostics with optional 687 /// template instantiation stacks. 688 /// 689 /// This class provides a wrapper around the basic DiagnosticBuilder 690 /// class that emits diagnostics. SemaDiagnosticBuilder is 691 /// responsible for emitting the diagnostic (as DiagnosticBuilder 692 /// does) and, if the diagnostic comes from inside a template 693 /// instantiation, printing the template instantiation stack as 694 /// well. 695 class SemaDiagnosticBuilder : public DiagnosticBuilder { 696 Sema &SemaRef; 697 unsigned DiagID; 698 699 public: 700 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 701 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 702 703 explicit SemaDiagnosticBuilder(Sema &SemaRef) 704 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 705 706 ~SemaDiagnosticBuilder(); 707 }; 708 709 /// \brief Emit a diagnostic. 710 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 711 712 /// \brief Emit a partial diagnostic. 713 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 714 715 /// \brief Build a partial diagnostic. 716 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 717 718 bool findMacroSpelling(SourceLocation &loc, StringRef name); 719 720 /// \brief Get a string to suggest for zero-initialization of a type. 721 const char *getFixItZeroInitializerForType(QualType T) const; 722 723 ExprResult Owned(Expr* E) { return E; } 724 ExprResult Owned(ExprResult R) { return R; } 725 StmtResult Owned(Stmt* S) { return S; } 726 727 void ActOnEndOfTranslationUnit(); 728 729 void CheckDelegatingCtorCycles(); 730 731 Scope *getScopeForContext(DeclContext *Ctx); 732 733 void PushFunctionScope(); 734 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 735 void PushLambdaScope(CXXRecordDecl *Lambda, CXXMethodDecl *CallOperator); 736 void PopFunctionScopeInfo(const sema::AnalysisBasedWarnings::Policy *WP =0, 737 const Decl *D = 0, const BlockExpr *blkExpr = 0); 738 739 sema::FunctionScopeInfo *getCurFunction() const { 740 return FunctionScopes.back(); 741 } 742 743 bool hasAnyUnrecoverableErrorsInThisFunction() const; 744 745 /// \brief Retrieve the current block, if any. 746 sema::BlockScopeInfo *getCurBlock(); 747 748 /// \brief Retrieve the current lambda expression, if any. 749 sema::LambdaScopeInfo *getCurLambda(); 750 751 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 752 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 753 754 //===--------------------------------------------------------------------===// 755 // Type Analysis / Processing: SemaType.cpp. 756 // 757 758 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 759 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 760 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 761 } 762 QualType BuildPointerType(QualType T, 763 SourceLocation Loc, DeclarationName Entity); 764 QualType BuildReferenceType(QualType T, bool LValueRef, 765 SourceLocation Loc, DeclarationName Entity); 766 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 767 Expr *ArraySize, unsigned Quals, 768 SourceRange Brackets, DeclarationName Entity); 769 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 770 SourceLocation AttrLoc); 771 QualType BuildFunctionType(QualType T, 772 QualType *ParamTypes, unsigned NumParamTypes, 773 bool Variadic, unsigned Quals, 774 RefQualifierKind RefQualifier, 775 SourceLocation Loc, DeclarationName Entity, 776 FunctionType::ExtInfo Info); 777 QualType BuildMemberPointerType(QualType T, QualType Class, 778 SourceLocation Loc, 779 DeclarationName Entity); 780 QualType BuildBlockPointerType(QualType T, 781 SourceLocation Loc, DeclarationName Entity); 782 QualType BuildParenType(QualType T); 783 QualType BuildAtomicType(QualType T, SourceLocation Loc); 784 785 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); 786 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); 787 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 788 TypeSourceInfo *ReturnTypeInfo); 789 /// \brief Package the given type and TSI into a ParsedType. 790 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 791 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 792 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 793 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 794 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 795 bool CheckDistantExceptionSpec(QualType T); 796 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 797 bool CheckEquivalentExceptionSpec( 798 const FunctionProtoType *Old, SourceLocation OldLoc, 799 const FunctionProtoType *New, SourceLocation NewLoc); 800 bool CheckEquivalentExceptionSpec( 801 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 802 const FunctionProtoType *Old, SourceLocation OldLoc, 803 const FunctionProtoType *New, SourceLocation NewLoc, 804 bool *MissingExceptionSpecification = 0, 805 bool *MissingEmptyExceptionSpecification = 0, 806 bool AllowNoexceptAllMatchWithNoSpec = false, 807 bool IsOperatorNew = false); 808 bool CheckExceptionSpecSubset( 809 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 810 const FunctionProtoType *Superset, SourceLocation SuperLoc, 811 const FunctionProtoType *Subset, SourceLocation SubLoc); 812 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 813 const FunctionProtoType *Target, SourceLocation TargetLoc, 814 const FunctionProtoType *Source, SourceLocation SourceLoc); 815 816 TypeResult ActOnTypeName(Scope *S, Declarator &D); 817 818 /// \brief The parser has parsed the context-sensitive type 'instancetype' 819 /// in an Objective-C message declaration. Return the appropriate type. 820 ParsedType ActOnObjCInstanceType(SourceLocation Loc); 821 822 bool RequireCompleteType(SourceLocation Loc, QualType T, 823 const PartialDiagnostic &PD, 824 std::pair<SourceLocation, PartialDiagnostic> Note); 825 bool RequireCompleteType(SourceLocation Loc, QualType T, 826 const PartialDiagnostic &PD); 827 bool RequireCompleteType(SourceLocation Loc, QualType T, 828 unsigned DiagID); 829 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 830 std::pair<SourceLocation, 831 PartialDiagnostic> Note); 832 833 bool RequireLiteralType(SourceLocation Loc, QualType T, 834 const PartialDiagnostic &PD, 835 bool AllowIncompleteType = false); 836 837 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 838 const CXXScopeSpec &SS, QualType T); 839 840 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 841 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 842 QualType BuildUnaryTransformType(QualType BaseType, 843 UnaryTransformType::UTTKind UKind, 844 SourceLocation Loc); 845 846 //===--------------------------------------------------------------------===// 847 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 848 // 849 850 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 851 852 void DiagnoseUseOfUnimplementedSelectors(); 853 854 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 855 Scope *S, CXXScopeSpec *SS = 0, 856 bool isClassName = false, 857 bool HasTrailingDot = false, 858 ParsedType ObjectType = ParsedType(), 859 bool IsCtorOrDtorName = false, 860 bool WantNontrivialTypeSourceInfo = false, 861 IdentifierInfo **CorrectedII = 0); 862 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 863 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS, Scope *S); 864 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 865 SourceLocation IILoc, 866 Scope *S, 867 CXXScopeSpec *SS, 868 ParsedType &SuggestedType); 869 870 /// \brief Describes the result of the name lookup and resolution performed 871 /// by \c ClassifyName(). 872 enum NameClassificationKind { 873 NC_Unknown, 874 NC_Error, 875 NC_Keyword, 876 NC_Type, 877 NC_Expression, 878 NC_NestedNameSpecifier, 879 NC_TypeTemplate, 880 NC_FunctionTemplate 881 }; 882 883 class NameClassification { 884 NameClassificationKind Kind; 885 ExprResult Expr; 886 TemplateName Template; 887 ParsedType Type; 888 const IdentifierInfo *Keyword; 889 890 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 891 892 public: 893 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 894 895 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 896 897 NameClassification(const IdentifierInfo *Keyword) 898 : Kind(NC_Keyword), Keyword(Keyword) { } 899 900 static NameClassification Error() { 901 return NameClassification(NC_Error); 902 } 903 904 static NameClassification Unknown() { 905 return NameClassification(NC_Unknown); 906 } 907 908 static NameClassification NestedNameSpecifier() { 909 return NameClassification(NC_NestedNameSpecifier); 910 } 911 912 static NameClassification TypeTemplate(TemplateName Name) { 913 NameClassification Result(NC_TypeTemplate); 914 Result.Template = Name; 915 return Result; 916 } 917 918 static NameClassification FunctionTemplate(TemplateName Name) { 919 NameClassification Result(NC_FunctionTemplate); 920 Result.Template = Name; 921 return Result; 922 } 923 924 NameClassificationKind getKind() const { return Kind; } 925 926 ParsedType getType() const { 927 assert(Kind == NC_Type); 928 return Type; 929 } 930 931 ExprResult getExpression() const { 932 assert(Kind == NC_Expression); 933 return Expr; 934 } 935 936 TemplateName getTemplateName() const { 937 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 938 return Template; 939 } 940 941 TemplateNameKind getTemplateNameKind() const { 942 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 943 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 944 } 945}; 946 947 /// \brief Perform name lookup on the given name, classifying it based on 948 /// the results of name lookup and the following token. 949 /// 950 /// This routine is used by the parser to resolve identifiers and help direct 951 /// parsing. When the identifier cannot be found, this routine will attempt 952 /// to correct the typo and classify based on the resulting name. 953 /// 954 /// \param S The scope in which we're performing name lookup. 955 /// 956 /// \param SS The nested-name-specifier that precedes the name. 957 /// 958 /// \param Name The identifier. If typo correction finds an alternative name, 959 /// this pointer parameter will be updated accordingly. 960 /// 961 /// \param NameLoc The location of the identifier. 962 /// 963 /// \param NextToken The token following the identifier. Used to help 964 /// disambiguate the name. 965 NameClassification ClassifyName(Scope *S, 966 CXXScopeSpec &SS, 967 IdentifierInfo *&Name, 968 SourceLocation NameLoc, 969 const Token &NextToken); 970 971 Decl *ActOnDeclarator(Scope *S, Declarator &D); 972 973 Decl *HandleDeclarator(Scope *S, Declarator &D, 974 MultiTemplateParamsArg TemplateParameterLists); 975 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 976 const LookupResult &Previous, 977 Scope *S); 978 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 979 void DiagnoseFunctionSpecifiers(Declarator& D); 980 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 981 void CheckShadow(Scope *S, VarDecl *D); 982 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 983 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 984 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 985 TypeSourceInfo *TInfo, 986 LookupResult &Previous); 987 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 988 LookupResult &Previous, bool &Redeclaration); 989 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 990 TypeSourceInfo *TInfo, 991 LookupResult &Previous, 992 MultiTemplateParamsArg TemplateParamLists); 993 // Returns true if the variable declaration is a redeclaration 994 bool CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous); 995 void CheckCompleteVariableDeclaration(VarDecl *var); 996 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 997 TypeSourceInfo *TInfo, 998 LookupResult &Previous, 999 MultiTemplateParamsArg TemplateParamLists, 1000 bool &AddToScope); 1001 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1002 1003 /// \brief The kind of constexpr declaration checking we are performing. 1004 /// 1005 /// The kind affects which diagnostics (if any) are emitted if the function 1006 /// does not satisfy the requirements of a constexpr function declaration. 1007 enum CheckConstexprKind { 1008 /// \brief Check a constexpr function declaration, and produce errors if it 1009 /// does not satisfy the requirements. 1010 CCK_Declaration, 1011 /// \brief Check a constexpr function template instantiation. 1012 CCK_Instantiation, 1013 /// \brief Produce notes explaining why an instantiation was not constexpr. 1014 CCK_NoteNonConstexprInstantiation 1015 }; 1016 bool CheckConstexprFunctionDecl(const FunctionDecl *FD, 1017 CheckConstexprKind CCK); 1018 bool CheckConstexprFunctionBody(const FunctionDecl *FD, Stmt *Body, 1019 bool IsInstantiation); 1020 1021 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1022 // Returns true if the function declaration is a redeclaration 1023 bool CheckFunctionDeclaration(Scope *S, 1024 FunctionDecl *NewFD, LookupResult &Previous, 1025 bool IsExplicitSpecialization); 1026 void CheckMain(FunctionDecl *FD, const DeclSpec &D); 1027 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1028 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1029 SourceLocation Loc, 1030 QualType T); 1031 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1032 SourceLocation NameLoc, IdentifierInfo *Name, 1033 QualType T, TypeSourceInfo *TSInfo, 1034 StorageClass SC, StorageClass SCAsWritten); 1035 void ActOnParamDefaultArgument(Decl *param, 1036 SourceLocation EqualLoc, 1037 Expr *defarg); 1038 void ActOnParamUnparsedDefaultArgument(Decl *param, 1039 SourceLocation EqualLoc, 1040 SourceLocation ArgLoc); 1041 void ActOnParamDefaultArgumentError(Decl *param); 1042 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1043 SourceLocation EqualLoc); 1044 1045 void CheckSelfReference(Decl *OrigDecl, Expr *E); 1046 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1047 bool TypeMayContainAuto); 1048 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1049 void ActOnInitializerError(Decl *Dcl); 1050 void ActOnCXXForRangeDecl(Decl *D); 1051 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1052 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1053 void FinalizeDeclaration(Decl *D); 1054 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1055 Decl **Group, 1056 unsigned NumDecls); 1057 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1058 bool TypeMayContainAuto = true); 1059 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1060 SourceLocation LocAfterDecls); 1061 void CheckForFunctionRedefinition(FunctionDecl *FD); 1062 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1063 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1064 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1065 1066 void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope); 1067 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1068 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1069 1070 /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an 1071 /// attribute for which parsing is delayed. 1072 void ActOnFinishDelayedAttribute(Scope *S, Decl *D, ParsedAttributes &Attrs); 1073 1074 /// \brief Diagnose any unused parameters in the given sequence of 1075 /// ParmVarDecl pointers. 1076 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1077 ParmVarDecl * const *End); 1078 1079 /// \brief Diagnose whether the size of parameters or return value of a 1080 /// function or obj-c method definition is pass-by-value and larger than a 1081 /// specified threshold. 1082 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1083 ParmVarDecl * const *End, 1084 QualType ReturnTy, 1085 NamedDecl *D); 1086 1087 void DiagnoseInvalidJumps(Stmt *Body); 1088 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1089 SourceLocation AsmLoc, 1090 SourceLocation RParenLoc); 1091 1092 /// \brief The parser has processed a module import declaration. 1093 /// 1094 /// \param AtLoc The location of the '@' symbol, if any. 1095 /// 1096 /// \param ImportLoc The location of the 'import' keyword. 1097 /// 1098 /// \param Path The module access path. 1099 DeclResult ActOnModuleImport(SourceLocation AtLoc, SourceLocation ImportLoc, 1100 ModuleIdPath Path); 1101 1102 /// \brief Retrieve a suitable printing policy. 1103 PrintingPolicy getPrintingPolicy() const { 1104 return getPrintingPolicy(Context, PP); 1105 } 1106 1107 /// \brief Retrieve a suitable printing policy. 1108 static PrintingPolicy getPrintingPolicy(const ASTContext &Ctx, 1109 const Preprocessor &PP); 1110 1111 /// Scope actions. 1112 void ActOnPopScope(SourceLocation Loc, Scope *S); 1113 void ActOnTranslationUnitScope(Scope *S); 1114 1115 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1116 DeclSpec &DS); 1117 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1118 DeclSpec &DS, 1119 MultiTemplateParamsArg TemplateParams); 1120 1121 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1122 AccessSpecifier AS, 1123 RecordDecl *Record); 1124 1125 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1126 RecordDecl *Record); 1127 1128 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1129 TagTypeKind NewTag, bool isDefinition, 1130 SourceLocation NewTagLoc, 1131 const IdentifierInfo &Name); 1132 1133 enum TagUseKind { 1134 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1135 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1136 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1137 TUK_Friend // Friend declaration: 'friend struct foo;' 1138 }; 1139 1140 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1141 SourceLocation KWLoc, CXXScopeSpec &SS, 1142 IdentifierInfo *Name, SourceLocation NameLoc, 1143 AttributeList *Attr, AccessSpecifier AS, 1144 SourceLocation ModulePrivateLoc, 1145 MultiTemplateParamsArg TemplateParameterLists, 1146 bool &OwnedDecl, bool &IsDependent, 1147 SourceLocation ScopedEnumKWLoc, 1148 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1149 1150 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1151 unsigned TagSpec, SourceLocation TagLoc, 1152 CXXScopeSpec &SS, 1153 IdentifierInfo *Name, SourceLocation NameLoc, 1154 AttributeList *Attr, 1155 MultiTemplateParamsArg TempParamLists); 1156 1157 TypeResult ActOnDependentTag(Scope *S, 1158 unsigned TagSpec, 1159 TagUseKind TUK, 1160 const CXXScopeSpec &SS, 1161 IdentifierInfo *Name, 1162 SourceLocation TagLoc, 1163 SourceLocation NameLoc); 1164 1165 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1166 IdentifierInfo *ClassName, 1167 SmallVectorImpl<Decl *> &Decls); 1168 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1169 Declarator &D, Expr *BitfieldWidth); 1170 1171 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1172 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1173 AccessSpecifier AS); 1174 1175 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1176 TypeSourceInfo *TInfo, 1177 RecordDecl *Record, SourceLocation Loc, 1178 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1179 SourceLocation TSSL, 1180 AccessSpecifier AS, NamedDecl *PrevDecl, 1181 Declarator *D = 0); 1182 1183 enum CXXSpecialMember { 1184 CXXDefaultConstructor, 1185 CXXCopyConstructor, 1186 CXXMoveConstructor, 1187 CXXCopyAssignment, 1188 CXXMoveAssignment, 1189 CXXDestructor, 1190 CXXInvalid 1191 }; 1192 bool CheckNontrivialField(FieldDecl *FD); 1193 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1194 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1195 void ActOnLastBitfield(SourceLocation DeclStart, 1196 SmallVectorImpl<Decl *> &AllIvarDecls); 1197 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, 1198 Declarator &D, Expr *BitfieldWidth, 1199 tok::ObjCKeywordKind visibility); 1200 1201 // This is used for both record definitions and ObjC interface declarations. 1202 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1203 llvm::ArrayRef<Decl *> Fields, 1204 SourceLocation LBrac, SourceLocation RBrac, 1205 AttributeList *AttrList); 1206 1207 /// ActOnTagStartDefinition - Invoked when we have entered the 1208 /// scope of a tag's definition (e.g., for an enumeration, class, 1209 /// struct, or union). 1210 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1211 1212 Decl *ActOnObjCContainerStartDefinition(Decl *IDecl); 1213 1214 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1215 /// C++ record definition's base-specifiers clause and are starting its 1216 /// member declarations. 1217 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1218 SourceLocation FinalLoc, 1219 SourceLocation LBraceLoc); 1220 1221 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1222 /// the definition of a tag (enumeration, class, struct, or union). 1223 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1224 SourceLocation RBraceLoc); 1225 1226 void ActOnObjCContainerFinishDefinition(); 1227 1228 /// \brief Invoked when we must temporarily exit the objective-c container 1229 /// scope for parsing/looking-up C constructs. 1230 /// 1231 /// Must be followed by a call to \see ActOnObjCReenterContainerContext 1232 void ActOnObjCTemporaryExitContainerContext(DeclContext *DC); 1233 void ActOnObjCReenterContainerContext(DeclContext *DC); 1234 1235 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1236 /// error parsing the definition of a tag. 1237 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1238 1239 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1240 EnumConstantDecl *LastEnumConst, 1241 SourceLocation IdLoc, 1242 IdentifierInfo *Id, 1243 Expr *val); 1244 1245 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1246 SourceLocation IdLoc, IdentifierInfo *Id, 1247 AttributeList *Attrs, 1248 SourceLocation EqualLoc, Expr *Val); 1249 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1250 SourceLocation RBraceLoc, Decl *EnumDecl, 1251 Decl **Elements, unsigned NumElements, 1252 Scope *S, AttributeList *Attr); 1253 1254 DeclContext *getContainingDC(DeclContext *DC); 1255 1256 /// Set the current declaration context until it gets popped. 1257 void PushDeclContext(Scope *S, DeclContext *DC); 1258 void PopDeclContext(); 1259 1260 /// EnterDeclaratorContext - Used when we must lookup names in the context 1261 /// of a declarator's nested name specifier. 1262 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1263 void ExitDeclaratorContext(Scope *S); 1264 1265 /// Push the parameters of D, which must be a function, into scope. 1266 void ActOnReenterFunctionContext(Scope* S, Decl* D); 1267 void ActOnExitFunctionContext() { PopDeclContext(); } 1268 1269 DeclContext *getFunctionLevelDeclContext(); 1270 1271 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1272 /// to the function decl for the function being parsed. If we're currently 1273 /// in a 'block', this returns the containing context. 1274 FunctionDecl *getCurFunctionDecl(); 1275 1276 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1277 /// the method decl for the method being parsed. If we're currently 1278 /// in a 'block', this returns the containing context. 1279 ObjCMethodDecl *getCurMethodDecl(); 1280 1281 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1282 /// or C function we're in, otherwise return null. If we're currently 1283 /// in a 'block', this returns the containing context. 1284 NamedDecl *getCurFunctionOrMethodDecl(); 1285 1286 /// Add this decl to the scope shadowed decl chains. 1287 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1288 1289 /// \brief Make the given externally-produced declaration visible at the 1290 /// top level scope. 1291 /// 1292 /// \param D The externally-produced declaration to push. 1293 /// 1294 /// \param Name The name of the externally-produced declaration. 1295 void pushExternalDeclIntoScope(NamedDecl *D, DeclarationName Name); 1296 1297 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1298 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1299 /// true if 'D' belongs to the given declaration context. 1300 /// 1301 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1302 /// whether the declaration is in scope for the purposes of explicit template 1303 /// instantiation or specialization. The default is false. 1304 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1305 bool ExplicitInstantiationOrSpecialization = false); 1306 1307 /// Finds the scope corresponding to the given decl context, if it 1308 /// happens to be an enclosing scope. Otherwise return NULL. 1309 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1310 1311 /// Subroutines of ActOnDeclarator(). 1312 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1313 TypeSourceInfo *TInfo); 1314 bool isIncompatibleTypedef(TypeDecl *Old, TypedefNameDecl *New); 1315 void mergeDeclAttributes(Decl *New, Decl *Old, bool MergeDeprecation = true); 1316 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1317 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1318 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1319 void mergeObjCMethodDecls(ObjCMethodDecl *New, ObjCMethodDecl *Old); 1320 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1321 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1322 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1323 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1324 1325 // AssignmentAction - This is used by all the assignment diagnostic functions 1326 // to represent what is actually causing the operation 1327 enum AssignmentAction { 1328 AA_Assigning, 1329 AA_Passing, 1330 AA_Returning, 1331 AA_Converting, 1332 AA_Initializing, 1333 AA_Sending, 1334 AA_Casting 1335 }; 1336 1337 /// C++ Overloading. 1338 enum OverloadKind { 1339 /// This is a legitimate overload: the existing declarations are 1340 /// functions or function templates with different signatures. 1341 Ovl_Overload, 1342 1343 /// This is not an overload because the signature exactly matches 1344 /// an existing declaration. 1345 Ovl_Match, 1346 1347 /// This is not an overload because the lookup results contain a 1348 /// non-function. 1349 Ovl_NonFunction 1350 }; 1351 OverloadKind CheckOverload(Scope *S, 1352 FunctionDecl *New, 1353 const LookupResult &OldDecls, 1354 NamedDecl *&OldDecl, 1355 bool IsForUsingDecl); 1356 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1357 1358 /// \brief Checks availability of the function depending on the current 1359 /// function context.Inside an unavailable function,unavailability is ignored. 1360 /// 1361 /// \returns true if \arg FD is unavailable and current context is inside 1362 /// an available function, false otherwise. 1363 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1364 1365 ImplicitConversionSequence 1366 TryImplicitConversion(Expr *From, QualType ToType, 1367 bool SuppressUserConversions, 1368 bool AllowExplicit, 1369 bool InOverloadResolution, 1370 bool CStyle, 1371 bool AllowObjCWritebackConversion); 1372 1373 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1374 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1375 bool IsComplexPromotion(QualType FromType, QualType ToType); 1376 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1377 bool InOverloadResolution, 1378 QualType& ConvertedType, bool &IncompatibleObjC); 1379 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1380 QualType& ConvertedType, bool &IncompatibleObjC); 1381 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1382 QualType &ConvertedType); 1383 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1384 QualType& ConvertedType); 1385 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1386 const FunctionProtoType *NewType, 1387 unsigned *ArgPos = 0); 1388 void HandleFunctionTypeMismatch(PartialDiagnostic &PDiag, 1389 QualType FromType, QualType ToType); 1390 1391 CastKind PrepareCastToObjCObjectPointer(ExprResult &E); 1392 bool CheckPointerConversion(Expr *From, QualType ToType, 1393 CastKind &Kind, 1394 CXXCastPath& BasePath, 1395 bool IgnoreBaseAccess); 1396 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1397 bool InOverloadResolution, 1398 QualType &ConvertedType); 1399 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1400 CastKind &Kind, 1401 CXXCastPath &BasePath, 1402 bool IgnoreBaseAccess); 1403 bool IsQualificationConversion(QualType FromType, QualType ToType, 1404 bool CStyle, bool &ObjCLifetimeConversion); 1405 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1406 QualType &ResultTy); 1407 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1408 1409 1410 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1411 const VarDecl *NRVOCandidate, 1412 QualType ResultType, 1413 Expr *Value, 1414 bool AllowNRVO = true); 1415 1416 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1417 ExprResult Init); 1418 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1419 SourceLocation EqualLoc, 1420 ExprResult Init, 1421 bool TopLevelOfInitList = false); 1422 ExprResult PerformObjectArgumentInitialization(Expr *From, 1423 NestedNameSpecifier *Qualifier, 1424 NamedDecl *FoundDecl, 1425 CXXMethodDecl *Method); 1426 1427 ExprResult PerformContextuallyConvertToBool(Expr *From); 1428 ExprResult PerformContextuallyConvertToObjCPointer(Expr *From); 1429 1430 /// Contexts in which a converted constant expression is required. 1431 enum CCEKind { 1432 CCEK_CaseValue, ///< Expression in a case label. 1433 CCEK_Enumerator, ///< Enumerator value with fixed underlying type. 1434 CCEK_TemplateArg ///< Value of a non-type template parameter. 1435 }; 1436 ExprResult CheckConvertedConstantExpression(Expr *From, QualType T, 1437 llvm::APSInt &Value, CCEKind CCE); 1438 1439 ExprResult 1440 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1441 const PartialDiagnostic &NotIntDiag, 1442 const PartialDiagnostic &IncompleteDiag, 1443 const PartialDiagnostic &ExplicitConvDiag, 1444 const PartialDiagnostic &ExplicitConvNote, 1445 const PartialDiagnostic &AmbigDiag, 1446 const PartialDiagnostic &AmbigNote, 1447 const PartialDiagnostic &ConvDiag, 1448 bool AllowScopedEnumerations); 1449 1450 ExprResult PerformObjectMemberConversion(Expr *From, 1451 NestedNameSpecifier *Qualifier, 1452 NamedDecl *FoundDecl, 1453 NamedDecl *Member); 1454 1455 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1456 // TODO: make this is a typesafe union. 1457 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1458 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 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 // Functions for marking a declaration referenced. These functions also 2269 // contain the relevant logic for marking if a reference to a function or 2270 // variable is an odr-use (in the C++11 sense). There are separate variants 2271 // for expressions referring to a decl; these exist because odr-use marking 2272 // needs to be delayed for some constant variables when we build one of the 2273 // named expressions. 2274 void MarkAnyDeclReferenced(SourceLocation Loc, Decl *D); 2275 void MarkFunctionReferenced(SourceLocation Loc, FunctionDecl *Func); 2276 void MarkVariableReferenced(SourceLocation Loc, VarDecl *Var); 2277 void MarkBlockDeclRefReferenced(BlockDeclRefExpr *E); 2278 void MarkDeclRefReferenced(DeclRefExpr *E); 2279 void MarkMemberReferenced(MemberExpr *E); 2280 2281 void UpdateMarkingForLValueToRValue(Expr *E); 2282 void CleanupVarDeclMarking(); 2283 2284 enum TryCaptureKind { 2285 TryCapture_Implicit, TryCapture_ExplicitByVal, TryCapture_ExplicitByRef 2286 }; 2287 void TryCaptureVar(VarDecl *var, SourceLocation loc, 2288 TryCaptureKind Kind = TryCapture_Implicit); 2289 2290 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2291 void MarkDeclarationsReferencedInExpr(Expr *E); 2292 2293 /// \brief Try to recover by turning the given expression into a 2294 /// call. Returns true if recovery was attempted or an error was 2295 /// emitted; this may also leave the ExprResult invalid. 2296 bool tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD, 2297 bool ForceComplain = false, 2298 bool (*IsPlausibleResult)(QualType) = 0); 2299 2300 /// \brief Figure out if an expression could be turned into a call. 2301 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2302 UnresolvedSetImpl &NonTemplateOverloads); 2303 2304 /// \brief Conditionally issue a diagnostic based on the current 2305 /// evaluation context. 2306 /// 2307 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2308 /// the function body is parsed, and then do a basic reachability analysis to 2309 /// determine if the statement is reachable. If it is unreachable, the 2310 /// diagnostic will not be emitted. 2311 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement, 2312 const PartialDiagnostic &PD); 2313 2314 // Primary Expressions. 2315 SourceRange getExprRange(Expr *E) const; 2316 2317 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, 2318 SourceLocation TemplateKWLoc, 2319 UnqualifiedId &Id, 2320 bool HasTrailingLParen, bool IsAddressOfOperand, 2321 CorrectionCandidateCallback *CCC = 0); 2322 2323 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2324 TemplateArgumentListInfo &Buffer, 2325 DeclarationNameInfo &NameInfo, 2326 const TemplateArgumentListInfo *&TemplateArgs); 2327 2328 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2329 CorrectionCandidateCallback &CCC, 2330 TemplateArgumentListInfo *ExplicitTemplateArgs = 0, 2331 Expr **Args = 0, unsigned NumArgs = 0); 2332 2333 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S, 2334 IdentifierInfo *II, 2335 bool AllowBuiltinCreation=false); 2336 2337 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2338 SourceLocation TemplateKWLoc, 2339 const DeclarationNameInfo &NameInfo, 2340 bool isAddressOfOperand, 2341 const TemplateArgumentListInfo *TemplateArgs); 2342 2343 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2344 ExprValueKind VK, 2345 SourceLocation Loc, 2346 const CXXScopeSpec *SS = 0); 2347 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2348 ExprValueKind VK, 2349 const DeclarationNameInfo &NameInfo, 2350 const CXXScopeSpec *SS = 0); 2351 ExprResult 2352 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2353 SourceLocation nameLoc, 2354 IndirectFieldDecl *indirectField, 2355 Expr *baseObjectExpr = 0, 2356 SourceLocation opLoc = SourceLocation()); 2357 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2358 SourceLocation TemplateKWLoc, 2359 LookupResult &R, 2360 const TemplateArgumentListInfo *TemplateArgs); 2361 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2362 SourceLocation TemplateKWLoc, 2363 LookupResult &R, 2364 const TemplateArgumentListInfo *TemplateArgs, 2365 bool IsDefiniteInstance); 2366 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2367 const LookupResult &R, 2368 bool HasTrailingLParen); 2369 2370 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2371 const DeclarationNameInfo &NameInfo); 2372 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2373 SourceLocation TemplateKWLoc, 2374 const DeclarationNameInfo &NameInfo, 2375 const TemplateArgumentListInfo *TemplateArgs); 2376 2377 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2378 LookupResult &R, 2379 bool NeedsADL); 2380 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2381 const DeclarationNameInfo &NameInfo, 2382 NamedDecl *D); 2383 2384 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2385 ExprResult ActOnNumericConstant(const Token &Tok); 2386 ExprResult ActOnCharacterConstant(const Token &Tok); 2387 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E); 2388 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2389 SourceLocation R, 2390 MultiExprArg Val); 2391 2392 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2393 /// fragments (e.g. "foo" "bar" L"baz"). 2394 ExprResult ActOnStringLiteral(const Token *StringToks, 2395 unsigned NumStringToks); 2396 2397 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2398 SourceLocation DefaultLoc, 2399 SourceLocation RParenLoc, 2400 Expr *ControllingExpr, 2401 MultiTypeArg ArgTypes, 2402 MultiExprArg ArgExprs); 2403 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2404 SourceLocation DefaultLoc, 2405 SourceLocation RParenLoc, 2406 Expr *ControllingExpr, 2407 TypeSourceInfo **Types, 2408 Expr **Exprs, 2409 unsigned NumAssocs); 2410 2411 // Binary/Unary Operators. 'Tok' is the token for the operator. 2412 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2413 Expr *InputExpr); 2414 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2415 UnaryOperatorKind Opc, Expr *Input); 2416 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2417 tok::TokenKind Op, Expr *Input); 2418 2419 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo, 2420 SourceLocation OpLoc, 2421 UnaryExprOrTypeTrait ExprKind, 2422 SourceRange R); 2423 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2424 UnaryExprOrTypeTrait ExprKind); 2425 ExprResult 2426 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2427 UnaryExprOrTypeTrait ExprKind, 2428 bool IsType, void *TyOrEx, 2429 const SourceRange &ArgRange); 2430 2431 ExprResult CheckPlaceholderExpr(Expr *E); 2432 bool CheckVecStepExpr(Expr *E); 2433 2434 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2435 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc, 2436 SourceRange ExprRange, 2437 UnaryExprOrTypeTrait ExprKind); 2438 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2439 SourceLocation OpLoc, 2440 IdentifierInfo &Name, 2441 SourceLocation NameLoc, 2442 SourceLocation RParenLoc); 2443 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2444 tok::TokenKind Kind, Expr *Input); 2445 2446 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2447 Expr *Idx, SourceLocation RLoc); 2448 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2449 Expr *Idx, SourceLocation RLoc); 2450 2451 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2452 SourceLocation OpLoc, bool IsArrow, 2453 CXXScopeSpec &SS, 2454 SourceLocation TemplateKWLoc, 2455 NamedDecl *FirstQualifierInScope, 2456 const DeclarationNameInfo &NameInfo, 2457 const TemplateArgumentListInfo *TemplateArgs); 2458 2459 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2460 SourceLocation OpLoc, bool IsArrow, 2461 const CXXScopeSpec &SS, 2462 SourceLocation TemplateKWLoc, 2463 NamedDecl *FirstQualifierInScope, 2464 LookupResult &R, 2465 const TemplateArgumentListInfo *TemplateArgs, 2466 bool SuppressQualifierCheck = false); 2467 2468 ExprResult PerformMemberExprBaseConversion(Expr *Base, bool IsArrow); 2469 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2470 bool &IsArrow, SourceLocation OpLoc, 2471 CXXScopeSpec &SS, 2472 Decl *ObjCImpDecl, 2473 bool HasTemplateArgs); 2474 2475 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2476 const CXXScopeSpec &SS, 2477 const LookupResult &R); 2478 2479 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2480 bool IsArrow, SourceLocation OpLoc, 2481 const CXXScopeSpec &SS, 2482 SourceLocation TemplateKWLoc, 2483 NamedDecl *FirstQualifierInScope, 2484 const DeclarationNameInfo &NameInfo, 2485 const TemplateArgumentListInfo *TemplateArgs); 2486 2487 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2488 SourceLocation OpLoc, 2489 tok::TokenKind OpKind, 2490 CXXScopeSpec &SS, 2491 SourceLocation TemplateKWLoc, 2492 UnqualifiedId &Member, 2493 Decl *ObjCImpDecl, 2494 bool HasTrailingLParen); 2495 2496 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2497 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2498 FunctionDecl *FDecl, 2499 const FunctionProtoType *Proto, 2500 Expr **Args, unsigned NumArgs, 2501 SourceLocation RParenLoc, 2502 bool ExecConfig = false); 2503 void CheckStaticArrayArgument(SourceLocation CallLoc, 2504 ParmVarDecl *Param, 2505 const Expr *ArgExpr); 2506 2507 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2508 /// This provides the location of the left/right parens and a list of comma 2509 /// locations. 2510 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2511 MultiExprArg ArgExprs, SourceLocation RParenLoc, 2512 Expr *ExecConfig = 0, bool IsExecConfig = false); 2513 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2514 SourceLocation LParenLoc, 2515 Expr **Args, unsigned NumArgs, 2516 SourceLocation RParenLoc, 2517 Expr *Config = 0, 2518 bool IsExecConfig = false); 2519 2520 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2521 MultiExprArg ExecConfig, 2522 SourceLocation GGGLoc); 2523 2524 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2525 Declarator &D, ParsedType &Ty, 2526 SourceLocation RParenLoc, Expr *CastExpr); 2527 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2528 TypeSourceInfo *Ty, 2529 SourceLocation RParenLoc, 2530 Expr *Op); 2531 CastKind PrepareScalarCast(ExprResult &src, QualType destType); 2532 2533 /// \brief Build an altivec or OpenCL literal. 2534 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2535 SourceLocation RParenLoc, Expr *E, 2536 TypeSourceInfo *TInfo); 2537 2538 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2539 2540 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2541 ParsedType Ty, 2542 SourceLocation RParenLoc, 2543 Expr *InitExpr); 2544 2545 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2546 TypeSourceInfo *TInfo, 2547 SourceLocation RParenLoc, 2548 Expr *LiteralExpr); 2549 2550 ExprResult ActOnInitList(SourceLocation LBraceLoc, 2551 MultiExprArg InitArgList, 2552 SourceLocation RBraceLoc); 2553 2554 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2555 SourceLocation Loc, 2556 bool GNUSyntax, 2557 ExprResult Init); 2558 2559 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2560 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr); 2561 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2562 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr); 2563 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc, 2564 Expr *LHSExpr, Expr *RHSExpr); 2565 2566 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2567 /// in the case of a the GNU conditional expr extension. 2568 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2569 SourceLocation ColonLoc, 2570 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr); 2571 2572 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2573 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2574 LabelDecl *TheDecl); 2575 2576 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2577 SourceLocation RPLoc); // "({..})" 2578 2579 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2580 struct OffsetOfComponent { 2581 SourceLocation LocStart, LocEnd; 2582 bool isBrackets; // true if [expr], false if .ident 2583 union { 2584 IdentifierInfo *IdentInfo; 2585 Expr *E; 2586 } U; 2587 }; 2588 2589 /// __builtin_offsetof(type, a.b[123][456].c) 2590 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2591 TypeSourceInfo *TInfo, 2592 OffsetOfComponent *CompPtr, 2593 unsigned NumComponents, 2594 SourceLocation RParenLoc); 2595 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2596 SourceLocation BuiltinLoc, 2597 SourceLocation TypeLoc, 2598 ParsedType ParsedArgTy, 2599 OffsetOfComponent *CompPtr, 2600 unsigned NumComponents, 2601 SourceLocation RParenLoc); 2602 2603 // __builtin_choose_expr(constExpr, expr1, expr2) 2604 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2605 Expr *CondExpr, Expr *LHSExpr, 2606 Expr *RHSExpr, SourceLocation RPLoc); 2607 2608 // __builtin_va_arg(expr, type) 2609 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, 2610 SourceLocation RPLoc); 2611 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E, 2612 TypeSourceInfo *TInfo, SourceLocation RPLoc); 2613 2614 // __null 2615 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2616 2617 bool CheckCaseExpression(Expr *E); 2618 2619 /// \brief Describes the result of an "if-exists" condition check. 2620 enum IfExistsResult { 2621 /// \brief The symbol exists. 2622 IER_Exists, 2623 2624 /// \brief The symbol does not exist. 2625 IER_DoesNotExist, 2626 2627 /// \brief The name is a dependent name, so the results will differ 2628 /// from one instantiation to the next. 2629 IER_Dependent, 2630 2631 /// \brief An error occurred. 2632 IER_Error 2633 }; 2634 2635 IfExistsResult 2636 CheckMicrosoftIfExistsSymbol(Scope *S, CXXScopeSpec &SS, 2637 const DeclarationNameInfo &TargetNameInfo); 2638 2639 IfExistsResult 2640 CheckMicrosoftIfExistsSymbol(Scope *S, SourceLocation KeywordLoc, 2641 bool IsIfExists, CXXScopeSpec &SS, 2642 UnqualifiedId &Name); 2643 2644 StmtResult BuildMSDependentExistsStmt(SourceLocation KeywordLoc, 2645 bool IsIfExists, 2646 NestedNameSpecifierLoc QualifierLoc, 2647 DeclarationNameInfo NameInfo, 2648 Stmt *Nested); 2649 StmtResult ActOnMSDependentExistsStmt(SourceLocation KeywordLoc, 2650 bool IsIfExists, 2651 CXXScopeSpec &SS, UnqualifiedId &Name, 2652 Stmt *Nested); 2653 2654 //===------------------------- "Block" Extension ------------------------===// 2655 2656 /// ActOnBlockStart - This callback is invoked when a block literal is 2657 /// started. 2658 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2659 2660 /// ActOnBlockArguments - This callback allows processing of block arguments. 2661 /// If there are no arguments, this is still invoked. 2662 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2663 2664 /// ActOnBlockError - If there is an error parsing a block, this callback 2665 /// is invoked to pop the information about the block from the action impl. 2666 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2667 2668 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2669 /// literal was successfully completed. ^(int x){...} 2670 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body, 2671 Scope *CurScope); 2672 2673 //===---------------------------- OpenCL Features -----------------------===// 2674 2675 /// __builtin_astype(...) 2676 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, 2677 SourceLocation BuiltinLoc, 2678 SourceLocation RParenLoc); 2679 2680 //===---------------------------- C++ Features --------------------------===// 2681 2682 // Act on C++ namespaces 2683 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2684 SourceLocation NamespaceLoc, 2685 SourceLocation IdentLoc, 2686 IdentifierInfo *Ident, 2687 SourceLocation LBrace, 2688 AttributeList *AttrList); 2689 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2690 2691 NamespaceDecl *getStdNamespace() const; 2692 NamespaceDecl *getOrCreateStdNamespace(); 2693 2694 CXXRecordDecl *getStdBadAlloc() const; 2695 2696 /// \brief Tests whether Ty is an instance of std::initializer_list and, if 2697 /// it is and Element is not NULL, assigns the element type to Element. 2698 bool isStdInitializerList(QualType Ty, QualType *Element); 2699 2700 /// \brief Looks for the std::initializer_list template and instantiates it 2701 /// with Element, or emits an error if it's not found. 2702 /// 2703 /// \returns The instantiated template, or null on error. 2704 QualType BuildStdInitializerList(QualType Element, SourceLocation Loc); 2705 2706 /// \brief Determine whether Ctor is an initializer-list constructor, as 2707 /// defined in [dcl.init.list]p2. 2708 bool isInitListConstructor(const CXXConstructorDecl *Ctor); 2709 2710 Decl *ActOnUsingDirective(Scope *CurScope, 2711 SourceLocation UsingLoc, 2712 SourceLocation NamespcLoc, 2713 CXXScopeSpec &SS, 2714 SourceLocation IdentLoc, 2715 IdentifierInfo *NamespcName, 2716 AttributeList *AttrList); 2717 2718 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2719 2720 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2721 SourceLocation NamespaceLoc, 2722 SourceLocation AliasLoc, 2723 IdentifierInfo *Alias, 2724 CXXScopeSpec &SS, 2725 SourceLocation IdentLoc, 2726 IdentifierInfo *Ident); 2727 2728 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2729 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2730 const LookupResult &PreviousDecls); 2731 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2732 NamedDecl *Target); 2733 2734 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2735 bool isTypeName, 2736 const CXXScopeSpec &SS, 2737 SourceLocation NameLoc, 2738 const LookupResult &Previous); 2739 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2740 const CXXScopeSpec &SS, 2741 SourceLocation NameLoc); 2742 2743 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2744 SourceLocation UsingLoc, 2745 CXXScopeSpec &SS, 2746 const DeclarationNameInfo &NameInfo, 2747 AttributeList *AttrList, 2748 bool IsInstantiation, 2749 bool IsTypeName, 2750 SourceLocation TypenameLoc); 2751 2752 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2753 2754 Decl *ActOnUsingDeclaration(Scope *CurScope, 2755 AccessSpecifier AS, 2756 bool HasUsingKeyword, 2757 SourceLocation UsingLoc, 2758 CXXScopeSpec &SS, 2759 UnqualifiedId &Name, 2760 AttributeList *AttrList, 2761 bool IsTypeName, 2762 SourceLocation TypenameLoc); 2763 Decl *ActOnAliasDeclaration(Scope *CurScope, 2764 AccessSpecifier AS, 2765 MultiTemplateParamsArg TemplateParams, 2766 SourceLocation UsingLoc, 2767 UnqualifiedId &Name, 2768 TypeResult Type); 2769 2770 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2771 /// ActOnDeclarator, when a C++ direct initializer is present. 2772 /// e.g: "int x(1);" 2773 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2774 SourceLocation LParenLoc, 2775 MultiExprArg Exprs, 2776 SourceLocation RParenLoc, 2777 bool TypeMayContainAuto); 2778 2779 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2780 /// and sets it as the initializer for the the passed in VarDecl. 2781 bool InitializeVarWithConstructor(VarDecl *VD, 2782 CXXConstructorDecl *Constructor, 2783 MultiExprArg Exprs, 2784 bool HadMultipleCandidates); 2785 2786 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2787 /// including handling of its default argument expressions. 2788 /// 2789 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2790 ExprResult 2791 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2792 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2793 bool HadMultipleCandidates, bool RequiresZeroInit, 2794 unsigned ConstructKind, SourceRange ParenRange); 2795 2796 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2797 // the constructor can be elidable? 2798 ExprResult 2799 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2800 CXXConstructorDecl *Constructor, bool Elidable, 2801 MultiExprArg Exprs, bool HadMultipleCandidates, 2802 bool RequiresZeroInit, unsigned ConstructKind, 2803 SourceRange ParenRange); 2804 2805 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2806 /// the default expr if needed. 2807 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2808 FunctionDecl *FD, 2809 ParmVarDecl *Param); 2810 2811 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2812 /// constructed variable. 2813 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2814 2815 /// \brief Helper class that collects exception specifications for 2816 /// implicitly-declared special member functions. 2817 class ImplicitExceptionSpecification { 2818 // Pointer to allow copying 2819 ASTContext *Context; 2820 // We order exception specifications thus: 2821 // noexcept is the most restrictive, but is only used in C++0x. 2822 // throw() comes next. 2823 // Then a throw(collected exceptions) 2824 // Finally no specification. 2825 // throw(...) is used instead if any called function uses it. 2826 // 2827 // If this exception specification cannot be known yet (for instance, 2828 // because this is the exception specification for a defaulted default 2829 // constructor and we haven't finished parsing the deferred parts of the 2830 // class yet), the C++0x standard does not specify how to behave. We 2831 // record this as an 'unknown' exception specification, which overrules 2832 // any other specification (even 'none', to keep this rule simple). 2833 ExceptionSpecificationType ComputedEST; 2834 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2835 SmallVector<QualType, 4> Exceptions; 2836 2837 void ClearExceptions() { 2838 ExceptionsSeen.clear(); 2839 Exceptions.clear(); 2840 } 2841 2842 public: 2843 explicit ImplicitExceptionSpecification(ASTContext &Context) 2844 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2845 if (!Context.getLangOptions().CPlusPlus0x) 2846 ComputedEST = EST_DynamicNone; 2847 } 2848 2849 /// \brief Get the computed exception specification type. 2850 ExceptionSpecificationType getExceptionSpecType() const { 2851 assert(ComputedEST != EST_ComputedNoexcept && 2852 "noexcept(expr) should not be a possible result"); 2853 return ComputedEST; 2854 } 2855 2856 /// \brief The number of exceptions in the exception specification. 2857 unsigned size() const { return Exceptions.size(); } 2858 2859 /// \brief The set of exceptions in the exception specification. 2860 const QualType *data() const { return Exceptions.data(); } 2861 2862 /// \brief Integrate another called method into the collected data. 2863 void CalledDecl(CXXMethodDecl *Method); 2864 2865 /// \brief Integrate an invoked expression into the collected data. 2866 void CalledExpr(Expr *E); 2867 2868 /// \brief Specify that the exception specification can't be detemined yet. 2869 void SetDelayed() { 2870 ClearExceptions(); 2871 ComputedEST = EST_Delayed; 2872 } 2873 2874 FunctionProtoType::ExtProtoInfo getEPI() const { 2875 FunctionProtoType::ExtProtoInfo EPI; 2876 EPI.ExceptionSpecType = getExceptionSpecType(); 2877 EPI.NumExceptions = size(); 2878 EPI.Exceptions = data(); 2879 return EPI; 2880 } 2881 }; 2882 2883 /// \brief Determine what sort of exception specification a defaulted 2884 /// copy constructor of a class will have. 2885 ImplicitExceptionSpecification 2886 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2887 2888 /// \brief Determine what sort of exception specification a defaulted 2889 /// default constructor of a class will have, and whether the parameter 2890 /// will be const. 2891 std::pair<ImplicitExceptionSpecification, bool> 2892 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2893 2894 /// \brief Determine what sort of exception specification a defautled 2895 /// copy assignment operator of a class will have, and whether the 2896 /// parameter will be const. 2897 std::pair<ImplicitExceptionSpecification, bool> 2898 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2899 2900 /// \brief Determine what sort of exception specification a defaulted move 2901 /// constructor of a class will have. 2902 ImplicitExceptionSpecification 2903 ComputeDefaultedMoveCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2904 2905 /// \brief Determine what sort of exception specification a defaulted move 2906 /// assignment operator of a class will have. 2907 ImplicitExceptionSpecification 2908 ComputeDefaultedMoveAssignmentExceptionSpec(CXXRecordDecl *ClassDecl); 2909 2910 /// \brief Determine what sort of exception specification a defaulted 2911 /// destructor of a class will have. 2912 ImplicitExceptionSpecification 2913 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 2914 2915 /// \brief Determine if a special member function should have a deleted 2916 /// definition when it is defaulted. 2917 bool ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM); 2918 2919 /// \brief Determine if a defaulted copy assignment operator ought to be 2920 /// deleted. 2921 bool ShouldDeleteCopyAssignmentOperator(CXXMethodDecl *MD); 2922 2923 /// \brief Determine if a defaulted move assignment operator ought to be 2924 /// deleted. 2925 bool ShouldDeleteMoveAssignmentOperator(CXXMethodDecl *MD); 2926 2927 /// \brief Determine if a defaulted destructor ought to be deleted. 2928 bool ShouldDeleteDestructor(CXXDestructorDecl *DD); 2929 2930 /// \brief Declare the implicit default constructor for the given class. 2931 /// 2932 /// \param ClassDecl The class declaration into which the implicit 2933 /// default constructor will be added. 2934 /// 2935 /// \returns The implicitly-declared default constructor. 2936 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2937 CXXRecordDecl *ClassDecl); 2938 2939 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2940 /// defining this constructor as the default constructor. 2941 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2942 CXXConstructorDecl *Constructor); 2943 2944 /// \brief Declare the implicit destructor for the given class. 2945 /// 2946 /// \param ClassDecl The class declaration into which the implicit 2947 /// destructor will be added. 2948 /// 2949 /// \returns The implicitly-declared destructor. 2950 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2951 2952 /// DefineImplicitDestructor - Checks for feasibility of 2953 /// defining this destructor as the default destructor. 2954 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2955 CXXDestructorDecl *Destructor); 2956 2957 /// \brief Build an exception spec for destructors that don't have one. 2958 /// 2959 /// C++11 says that user-defined destructors with no exception spec get one 2960 /// that looks as if the destructor was implicitly declared. 2961 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 2962 CXXDestructorDecl *Destructor); 2963 2964 /// \brief Declare all inherited constructors for the given class. 2965 /// 2966 /// \param ClassDecl The class declaration into which the inherited 2967 /// constructors will be added. 2968 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2969 2970 /// \brief Declare the implicit copy constructor for the given class. 2971 /// 2972 /// \param ClassDecl The class declaration into which the implicit 2973 /// copy constructor will be added. 2974 /// 2975 /// \returns The implicitly-declared copy constructor. 2976 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2977 2978 /// DefineImplicitCopyConstructor - Checks for feasibility of 2979 /// defining this constructor as the copy constructor. 2980 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2981 CXXConstructorDecl *Constructor); 2982 2983 /// \brief Declare the implicit move constructor for the given class. 2984 /// 2985 /// \param ClassDecl The Class declaration into which the implicit 2986 /// move constructor will be added. 2987 /// 2988 /// \returns The implicitly-declared move constructor, or NULL if it wasn't 2989 /// declared. 2990 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl); 2991 2992 /// DefineImplicitMoveConstructor - Checks for feasibility of 2993 /// defining this constructor as the move constructor. 2994 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation, 2995 CXXConstructorDecl *Constructor); 2996 2997 /// \brief Declare the implicit copy assignment operator for the given class. 2998 /// 2999 /// \param ClassDecl The class declaration into which the implicit 3000 /// copy assignment operator will be added. 3001 /// 3002 /// \returns The implicitly-declared copy assignment operator. 3003 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 3004 3005 /// \brief Defines an implicitly-declared copy assignment operator. 3006 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 3007 CXXMethodDecl *MethodDecl); 3008 3009 /// \brief Declare the implicit move assignment operator for the given class. 3010 /// 3011 /// \param ClassDecl The Class declaration into which the implicit 3012 /// move assignment operator will be added. 3013 /// 3014 /// \returns The implicitly-declared move assignment operator, or NULL if it 3015 /// wasn't declared. 3016 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl); 3017 3018 /// \brief Defines an implicitly-declared move assignment operator. 3019 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation, 3020 CXXMethodDecl *MethodDecl); 3021 3022 /// \brief Force the declaration of any implicitly-declared members of this 3023 /// class. 3024 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 3025 3026 /// MaybeBindToTemporary - If the passed in expression has a record type with 3027 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 3028 /// it simply returns the passed in expression. 3029 ExprResult MaybeBindToTemporary(Expr *E); 3030 3031 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 3032 MultiExprArg ArgsPtr, 3033 SourceLocation Loc, 3034 ASTOwningVector<Expr*> &ConvertedArgs); 3035 3036 ParsedType getDestructorName(SourceLocation TildeLoc, 3037 IdentifierInfo &II, SourceLocation NameLoc, 3038 Scope *S, CXXScopeSpec &SS, 3039 ParsedType ObjectType, 3040 bool EnteringContext); 3041 3042 ParsedType getDestructorType(const DeclSpec& DS, ParsedType ObjectType); 3043 3044 // Checks that reinterpret casts don't have undefined behavior. 3045 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 3046 bool IsDereference, SourceRange Range); 3047 3048 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 3049 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 3050 tok::TokenKind Kind, 3051 SourceLocation LAngleBracketLoc, 3052 Declarator &D, 3053 SourceLocation RAngleBracketLoc, 3054 SourceLocation LParenLoc, 3055 Expr *E, 3056 SourceLocation RParenLoc); 3057 3058 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 3059 tok::TokenKind Kind, 3060 TypeSourceInfo *Ty, 3061 Expr *E, 3062 SourceRange AngleBrackets, 3063 SourceRange Parens); 3064 3065 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3066 SourceLocation TypeidLoc, 3067 TypeSourceInfo *Operand, 3068 SourceLocation RParenLoc); 3069 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3070 SourceLocation TypeidLoc, 3071 Expr *Operand, 3072 SourceLocation RParenLoc); 3073 3074 /// ActOnCXXTypeid - Parse typeid( something ). 3075 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 3076 SourceLocation LParenLoc, bool isType, 3077 void *TyOrExpr, 3078 SourceLocation RParenLoc); 3079 3080 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3081 SourceLocation TypeidLoc, 3082 TypeSourceInfo *Operand, 3083 SourceLocation RParenLoc); 3084 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3085 SourceLocation TypeidLoc, 3086 Expr *Operand, 3087 SourceLocation RParenLoc); 3088 3089 /// ActOnCXXUuidof - Parse __uuidof( something ). 3090 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 3091 SourceLocation LParenLoc, bool isType, 3092 void *TyOrExpr, 3093 SourceLocation RParenLoc); 3094 3095 3096 //// ActOnCXXThis - Parse 'this' pointer. 3097 ExprResult ActOnCXXThis(SourceLocation loc); 3098 3099 /// \brief Try to retrieve the type of the 'this' pointer. 3100 /// 3101 /// \param Capture If true, capture 'this' in this context. 3102 /// 3103 /// \returns The type of 'this', if possible. Otherwise, returns a NULL type. 3104 QualType getCurrentThisType(); 3105 3106 /// \brief Make sure the value of 'this' is actually available in the current 3107 /// context, if it is a potentially evaluated context. 3108 /// 3109 /// \param Loc The location at which the capture of 'this' occurs. 3110 /// 3111 /// \param Explicit Whether 'this' is explicitly captured in a lambda 3112 /// capture list. 3113 void CheckCXXThisCapture(SourceLocation Loc, bool Explicit = false); 3114 3115 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 3116 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 3117 3118 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 3119 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 3120 3121 //// ActOnCXXThrow - Parse throw expressions. 3122 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 3123 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 3124 bool IsThrownVarInScope); 3125 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 3126 bool IsThrownVarInScope); 3127 3128 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 3129 /// Can be interpreted either as function-style casting ("int(x)") 3130 /// or class type construction ("ClassType(x,y,z)") 3131 /// or creation of a value-initialized type ("int()"). 3132 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 3133 SourceLocation LParenLoc, 3134 MultiExprArg Exprs, 3135 SourceLocation RParenLoc); 3136 3137 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 3138 SourceLocation LParenLoc, 3139 MultiExprArg Exprs, 3140 SourceLocation RParenLoc); 3141 3142 /// ActOnCXXNew - Parsed a C++ 'new' expression. 3143 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 3144 SourceLocation PlacementLParen, 3145 MultiExprArg PlacementArgs, 3146 SourceLocation PlacementRParen, 3147 SourceRange TypeIdParens, Declarator &D, 3148 SourceLocation ConstructorLParen, 3149 MultiExprArg ConstructorArgs, 3150 SourceLocation ConstructorRParen); 3151 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 3152 SourceLocation PlacementLParen, 3153 MultiExprArg PlacementArgs, 3154 SourceLocation PlacementRParen, 3155 SourceRange TypeIdParens, 3156 QualType AllocType, 3157 TypeSourceInfo *AllocTypeInfo, 3158 Expr *ArraySize, 3159 SourceLocation ConstructorLParen, 3160 MultiExprArg ConstructorArgs, 3161 SourceLocation ConstructorRParen, 3162 bool TypeMayContainAuto = true); 3163 3164 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 3165 SourceRange R); 3166 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 3167 bool UseGlobal, QualType AllocType, bool IsArray, 3168 Expr **PlaceArgs, unsigned NumPlaceArgs, 3169 FunctionDecl *&OperatorNew, 3170 FunctionDecl *&OperatorDelete); 3171 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 3172 DeclarationName Name, Expr** Args, 3173 unsigned NumArgs, DeclContext *Ctx, 3174 bool AllowMissing, FunctionDecl *&Operator, 3175 bool Diagnose = true); 3176 void DeclareGlobalNewDelete(); 3177 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 3178 QualType Argument, 3179 bool addMallocAttr = false); 3180 3181 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 3182 DeclarationName Name, FunctionDecl* &Operator, 3183 bool Diagnose = true); 3184 3185 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 3186 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 3187 bool UseGlobal, bool ArrayForm, 3188 Expr *Operand); 3189 3190 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 3191 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 3192 SourceLocation StmtLoc, 3193 bool ConvertToBoolean); 3194 3195 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 3196 Expr *Operand, SourceLocation RParen); 3197 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 3198 SourceLocation RParen); 3199 3200 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 3201 /// pseudo-functions. 3202 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 3203 SourceLocation KWLoc, 3204 ParsedType Ty, 3205 SourceLocation RParen); 3206 3207 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3208 SourceLocation KWLoc, 3209 TypeSourceInfo *T, 3210 SourceLocation RParen); 3211 3212 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3213 /// pseudo-functions. 3214 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3215 SourceLocation KWLoc, 3216 ParsedType LhsTy, 3217 ParsedType RhsTy, 3218 SourceLocation RParen); 3219 3220 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3221 SourceLocation KWLoc, 3222 TypeSourceInfo *LhsT, 3223 TypeSourceInfo *RhsT, 3224 SourceLocation RParen); 3225 3226 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3227 /// pseudo-functions. 3228 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3229 SourceLocation KWLoc, 3230 ParsedType LhsTy, 3231 Expr *DimExpr, 3232 SourceLocation RParen); 3233 3234 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3235 SourceLocation KWLoc, 3236 TypeSourceInfo *TSInfo, 3237 Expr *DimExpr, 3238 SourceLocation RParen); 3239 3240 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3241 /// pseudo-functions. 3242 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3243 SourceLocation KWLoc, 3244 Expr *Queried, 3245 SourceLocation RParen); 3246 3247 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3248 SourceLocation KWLoc, 3249 Expr *Queried, 3250 SourceLocation RParen); 3251 3252 ExprResult ActOnStartCXXMemberReference(Scope *S, 3253 Expr *Base, 3254 SourceLocation OpLoc, 3255 tok::TokenKind OpKind, 3256 ParsedType &ObjectType, 3257 bool &MayBePseudoDestructor); 3258 3259 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3260 3261 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3262 SourceLocation OpLoc, 3263 tok::TokenKind OpKind, 3264 const CXXScopeSpec &SS, 3265 TypeSourceInfo *ScopeType, 3266 SourceLocation CCLoc, 3267 SourceLocation TildeLoc, 3268 PseudoDestructorTypeStorage DestroyedType, 3269 bool HasTrailingLParen); 3270 3271 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3272 SourceLocation OpLoc, 3273 tok::TokenKind OpKind, 3274 CXXScopeSpec &SS, 3275 UnqualifiedId &FirstTypeName, 3276 SourceLocation CCLoc, 3277 SourceLocation TildeLoc, 3278 UnqualifiedId &SecondTypeName, 3279 bool HasTrailingLParen); 3280 3281 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3282 SourceLocation OpLoc, 3283 tok::TokenKind OpKind, 3284 SourceLocation TildeLoc, 3285 const DeclSpec& DS, 3286 bool HasTrailingLParen); 3287 3288 /// MaybeCreateExprWithCleanups - If the current full-expression 3289 /// requires any cleanups, surround it with a ExprWithCleanups node. 3290 /// Otherwise, just returns the passed-in expression. 3291 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3292 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3293 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3294 3295 ExprResult ActOnFinishFullExpr(Expr *Expr); 3296 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3297 3298 // Marks SS invalid if it represents an incomplete type. 3299 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3300 3301 DeclContext *computeDeclContext(QualType T); 3302 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3303 bool EnteringContext = false); 3304 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3305 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3306 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3307 3308 /// \brief The parser has parsed a global nested-name-specifier '::'. 3309 /// 3310 /// \param S The scope in which this nested-name-specifier occurs. 3311 /// 3312 /// \param CCLoc The location of the '::'. 3313 /// 3314 /// \param SS The nested-name-specifier, which will be updated in-place 3315 /// to reflect the parsed nested-name-specifier. 3316 /// 3317 /// \returns true if an error occurred, false otherwise. 3318 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3319 CXXScopeSpec &SS); 3320 3321 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3322 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3323 3324 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3325 SourceLocation IdLoc, 3326 IdentifierInfo &II, 3327 ParsedType ObjectType); 3328 3329 bool BuildCXXNestedNameSpecifier(Scope *S, 3330 IdentifierInfo &Identifier, 3331 SourceLocation IdentifierLoc, 3332 SourceLocation CCLoc, 3333 QualType ObjectType, 3334 bool EnteringContext, 3335 CXXScopeSpec &SS, 3336 NamedDecl *ScopeLookupResult, 3337 bool ErrorRecoveryLookup); 3338 3339 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3340 /// 3341 /// \param S The scope in which this nested-name-specifier occurs. 3342 /// 3343 /// \param Identifier The identifier preceding the '::'. 3344 /// 3345 /// \param IdentifierLoc The location of the identifier. 3346 /// 3347 /// \param CCLoc The location of the '::'. 3348 /// 3349 /// \param ObjectType The type of the object, if we're parsing 3350 /// nested-name-specifier in a member access expression. 3351 /// 3352 /// \param EnteringContext Whether we're entering the context nominated by 3353 /// this nested-name-specifier. 3354 /// 3355 /// \param SS The nested-name-specifier, which is both an input 3356 /// parameter (the nested-name-specifier before this type) and an 3357 /// output parameter (containing the full nested-name-specifier, 3358 /// including this new type). 3359 /// 3360 /// \returns true if an error occurred, false otherwise. 3361 bool ActOnCXXNestedNameSpecifier(Scope *S, 3362 IdentifierInfo &Identifier, 3363 SourceLocation IdentifierLoc, 3364 SourceLocation CCLoc, 3365 ParsedType ObjectType, 3366 bool EnteringContext, 3367 CXXScopeSpec &SS); 3368 3369 bool ActOnCXXNestedNameSpecifierDecltype(CXXScopeSpec &SS, 3370 const DeclSpec &DS, 3371 SourceLocation ColonColonLoc); 3372 3373 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3374 IdentifierInfo &Identifier, 3375 SourceLocation IdentifierLoc, 3376 SourceLocation ColonLoc, 3377 ParsedType ObjectType, 3378 bool EnteringContext); 3379 3380 /// \brief The parser has parsed a nested-name-specifier 3381 /// 'template[opt] template-name < template-args >::'. 3382 /// 3383 /// \param S The scope in which this nested-name-specifier occurs. 3384 /// 3385 /// \param SS The nested-name-specifier, which is both an input 3386 /// parameter (the nested-name-specifier before this type) and an 3387 /// output parameter (containing the full nested-name-specifier, 3388 /// including this new type). 3389 /// 3390 /// \param TemplateKWLoc the location of the 'template' keyword, if any. 3391 /// \param TemplateName The template name. 3392 /// \param TemplateNameLoc The location of the template name. 3393 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3394 /// \param TemplateArgs The template arguments. 3395 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3396 /// \param CCLoc The location of the '::'. 3397 /// 3398 /// \param EnteringContext Whether we're entering the context of the 3399 /// nested-name-specifier. 3400 /// 3401 /// 3402 /// \returns true if an error occurred, false otherwise. 3403 bool ActOnCXXNestedNameSpecifier(Scope *S, 3404 CXXScopeSpec &SS, 3405 SourceLocation TemplateKWLoc, 3406 TemplateTy Template, 3407 SourceLocation TemplateNameLoc, 3408 SourceLocation LAngleLoc, 3409 ASTTemplateArgsPtr TemplateArgs, 3410 SourceLocation RAngleLoc, 3411 SourceLocation CCLoc, 3412 bool EnteringContext); 3413 3414 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3415 /// that the parser can use later to reconstruct the given 3416 /// nested-name-specifier. 3417 /// 3418 /// \param SS A nested-name-specifier. 3419 /// 3420 /// \returns A pointer containing all of the information in the 3421 /// nested-name-specifier \p SS. 3422 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3423 3424 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3425 /// the nested-name-specifier structure. 3426 /// 3427 /// \param Annotation The annotation pointer, produced by 3428 /// \c SaveNestedNameSpecifierAnnotation(). 3429 /// 3430 /// \param AnnotationRange The source range corresponding to the annotation. 3431 /// 3432 /// \param SS The nested-name-specifier that will be updated with the contents 3433 /// of the annotation pointer. 3434 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3435 SourceRange AnnotationRange, 3436 CXXScopeSpec &SS); 3437 3438 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3439 3440 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3441 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3442 /// After this method is called, according to [C++ 3.4.3p3], names should be 3443 /// looked up in the declarator-id's scope, until the declarator is parsed and 3444 /// ActOnCXXExitDeclaratorScope is called. 3445 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3446 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3447 3448 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3449 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3450 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3451 /// Used to indicate that names should revert to being looked up in the 3452 /// defining scope. 3453 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3454 3455 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3456 /// initializer for the declaration 'Dcl'. 3457 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3458 /// static data member of class X, names should be looked up in the scope of 3459 /// class X. 3460 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3461 3462 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3463 /// initializer for the declaration 'Dcl'. 3464 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3465 3466 /// ActOnStartOfLambdaDefinition - This is called just before we start 3467 /// parsing the body of a lambda; it analyzes the explicit captures and 3468 /// arguments, and sets up various data-structures for the body of the 3469 /// lambda. 3470 void ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro, 3471 Declarator &ParamInfo, Scope *CurScope); 3472 3473 /// ActOnLambdaError - If there is an error parsing a lambda, this callback 3474 /// is invoked to pop the information about the lambda. 3475 void ActOnLambdaError(SourceLocation StartLoc, Scope *CurScope); 3476 3477 /// ActOnLambdaExpr - This is called when the body of a lambda expression 3478 /// was successfully completed. 3479 ExprResult ActOnLambdaExpr(SourceLocation StartLoc, Stmt *Body, 3480 Scope *CurScope); 3481 3482 // ParseObjCStringLiteral - Parse Objective-C string literals. 3483 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3484 Expr **Strings, 3485 unsigned NumStrings); 3486 3487 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3488 TypeSourceInfo *EncodedTypeInfo, 3489 SourceLocation RParenLoc); 3490 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3491 CXXMethodDecl *Method, 3492 bool HadMultipleCandidates); 3493 3494 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3495 SourceLocation EncodeLoc, 3496 SourceLocation LParenLoc, 3497 ParsedType Ty, 3498 SourceLocation RParenLoc); 3499 3500 // ParseObjCSelectorExpression - Build selector expression for @selector 3501 ExprResult ParseObjCSelectorExpression(Selector Sel, 3502 SourceLocation AtLoc, 3503 SourceLocation SelLoc, 3504 SourceLocation LParenLoc, 3505 SourceLocation RParenLoc); 3506 3507 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3508 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3509 SourceLocation AtLoc, 3510 SourceLocation ProtoLoc, 3511 SourceLocation LParenLoc, 3512 SourceLocation RParenLoc); 3513 3514 //===--------------------------------------------------------------------===// 3515 // C++ Declarations 3516 // 3517 Decl *ActOnStartLinkageSpecification(Scope *S, 3518 SourceLocation ExternLoc, 3519 SourceLocation LangLoc, 3520 StringRef Lang, 3521 SourceLocation LBraceLoc); 3522 Decl *ActOnFinishLinkageSpecification(Scope *S, 3523 Decl *LinkageSpec, 3524 SourceLocation RBraceLoc); 3525 3526 3527 //===--------------------------------------------------------------------===// 3528 // C++ Classes 3529 // 3530 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3531 const CXXScopeSpec *SS = 0); 3532 3533 bool ActOnAccessSpecifier(AccessSpecifier Access, 3534 SourceLocation ASLoc, 3535 SourceLocation ColonLoc, 3536 AttributeList *Attrs = 0); 3537 3538 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3539 Declarator &D, 3540 MultiTemplateParamsArg TemplateParameterLists, 3541 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3542 bool HasDeferredInit); 3543 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3544 Expr *Init); 3545 3546 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3547 Scope *S, 3548 CXXScopeSpec &SS, 3549 IdentifierInfo *MemberOrBase, 3550 ParsedType TemplateTypeTy, 3551 const DeclSpec &DS, 3552 SourceLocation IdLoc, 3553 SourceLocation LParenLoc, 3554 Expr **Args, unsigned NumArgs, 3555 SourceLocation RParenLoc, 3556 SourceLocation EllipsisLoc); 3557 3558 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3559 Scope *S, 3560 CXXScopeSpec &SS, 3561 IdentifierInfo *MemberOrBase, 3562 ParsedType TemplateTypeTy, 3563 const DeclSpec &DS, 3564 SourceLocation IdLoc, 3565 Expr *InitList, 3566 SourceLocation EllipsisLoc); 3567 3568 MemInitResult BuildMemInitializer(Decl *ConstructorD, 3569 Scope *S, 3570 CXXScopeSpec &SS, 3571 IdentifierInfo *MemberOrBase, 3572 ParsedType TemplateTypeTy, 3573 const DeclSpec &DS, 3574 SourceLocation IdLoc, 3575 const MultiInitializer &Init, 3576 SourceLocation EllipsisLoc); 3577 3578 MemInitResult BuildMemberInitializer(ValueDecl *Member, 3579 const MultiInitializer &Args, 3580 SourceLocation IdLoc); 3581 3582 MemInitResult BuildBaseInitializer(QualType BaseType, 3583 TypeSourceInfo *BaseTInfo, 3584 const MultiInitializer &Args, 3585 CXXRecordDecl *ClassDecl, 3586 SourceLocation EllipsisLoc); 3587 3588 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3589 const MultiInitializer &Args, 3590 CXXRecordDecl *ClassDecl); 3591 3592 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3593 CXXCtorInitializer *Initializer); 3594 3595 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3596 CXXCtorInitializer **Initializers, 3597 unsigned NumInitializers, bool AnyErrors); 3598 3599 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3600 3601 3602 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3603 /// mark all the non-trivial destructors of its members and bases as 3604 /// referenced. 3605 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3606 CXXRecordDecl *Record); 3607 3608 /// \brief The list of classes whose vtables have been used within 3609 /// this translation unit, and the source locations at which the 3610 /// first use occurred. 3611 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3612 3613 /// \brief The list of vtables that are required but have not yet been 3614 /// materialized. 3615 SmallVector<VTableUse, 16> VTableUses; 3616 3617 /// \brief The set of classes whose vtables have been used within 3618 /// this translation unit, and a bit that will be true if the vtable is 3619 /// required to be emitted (otherwise, it should be emitted only if needed 3620 /// by code generation). 3621 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3622 3623 /// \brief Load any externally-stored vtable uses. 3624 void LoadExternalVTableUses(); 3625 3626 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 3627 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 3628 DynamicClassesType; 3629 3630 /// \brief A list of all of the dynamic classes in this translation 3631 /// unit. 3632 DynamicClassesType DynamicClasses; 3633 3634 /// \brief Note that the vtable for the given class was used at the 3635 /// given location. 3636 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3637 bool DefinitionRequired = false); 3638 3639 /// MarkVirtualMembersReferenced - Will mark all members of the given 3640 /// CXXRecordDecl referenced. 3641 void MarkVirtualMembersReferenced(SourceLocation Loc, 3642 const CXXRecordDecl *RD); 3643 3644 /// \brief Define all of the vtables that have been used in this 3645 /// translation unit and reference any virtual members used by those 3646 /// vtables. 3647 /// 3648 /// \returns true if any work was done, false otherwise. 3649 bool DefineUsedVTables(); 3650 3651 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3652 3653 void ActOnMemInitializers(Decl *ConstructorDecl, 3654 SourceLocation ColonLoc, 3655 CXXCtorInitializer **MemInits, 3656 unsigned NumMemInits, 3657 bool AnyErrors); 3658 3659 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3660 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3661 Decl *TagDecl, 3662 SourceLocation LBrac, 3663 SourceLocation RBrac, 3664 AttributeList *AttrList); 3665 3666 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3667 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3668 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3669 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3670 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3671 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3672 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3673 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3674 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3675 bool IsInsideALocalClassWithinATemplateFunction(); 3676 3677 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3678 Expr *AssertExpr, 3679 Expr *AssertMessageExpr, 3680 SourceLocation RParenLoc); 3681 3682 FriendDecl *CheckFriendTypeDecl(SourceLocation Loc, 3683 SourceLocation FriendLoc, 3684 TypeSourceInfo *TSInfo); 3685 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3686 MultiTemplateParamsArg TemplateParams); 3687 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, 3688 MultiTemplateParamsArg TemplateParams); 3689 3690 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3691 StorageClass& SC); 3692 void CheckConstructor(CXXConstructorDecl *Constructor); 3693 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3694 StorageClass& SC); 3695 bool CheckDestructor(CXXDestructorDecl *Destructor); 3696 void CheckConversionDeclarator(Declarator &D, QualType &R, 3697 StorageClass& SC); 3698 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3699 3700 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3701 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3702 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3703 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3704 void CheckExplicitlyDefaultedMoveConstructor(CXXConstructorDecl *Ctor); 3705 void CheckExplicitlyDefaultedMoveAssignment(CXXMethodDecl *Method); 3706 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3707 3708 //===--------------------------------------------------------------------===// 3709 // C++ Derived Classes 3710 // 3711 3712 /// ActOnBaseSpecifier - Parsed a base specifier 3713 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3714 SourceRange SpecifierRange, 3715 bool Virtual, AccessSpecifier Access, 3716 TypeSourceInfo *TInfo, 3717 SourceLocation EllipsisLoc); 3718 3719 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3720 SourceRange SpecifierRange, 3721 bool Virtual, AccessSpecifier Access, 3722 ParsedType basetype, 3723 SourceLocation BaseLoc, 3724 SourceLocation EllipsisLoc); 3725 3726 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3727 unsigned NumBases); 3728 void ActOnBaseSpecifiers(Decl *ClassDecl, CXXBaseSpecifier **Bases, 3729 unsigned NumBases); 3730 3731 bool IsDerivedFrom(QualType Derived, QualType Base); 3732 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3733 3734 // FIXME: I don't like this name. 3735 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3736 3737 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3738 3739 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3740 SourceLocation Loc, SourceRange Range, 3741 CXXCastPath *BasePath = 0, 3742 bool IgnoreAccess = false); 3743 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3744 unsigned InaccessibleBaseID, 3745 unsigned AmbigiousBaseConvID, 3746 SourceLocation Loc, SourceRange Range, 3747 DeclarationName Name, 3748 CXXCastPath *BasePath); 3749 3750 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3751 3752 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3753 /// covariant, according to C++ [class.virtual]p5. 3754 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3755 const CXXMethodDecl *Old); 3756 3757 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3758 /// spec is a subset of base spec. 3759 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3760 const CXXMethodDecl *Old); 3761 3762 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3763 3764 /// CheckOverrideControl - Check C++0x override control semantics. 3765 void CheckOverrideControl(const Decl *D); 3766 3767 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3768 /// overrides a virtual member function marked 'final', according to 3769 /// C++0x [class.virtual]p3. 3770 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3771 const CXXMethodDecl *Old); 3772 3773 3774 //===--------------------------------------------------------------------===// 3775 // C++ Access Control 3776 // 3777 3778 enum AccessResult { 3779 AR_accessible, 3780 AR_inaccessible, 3781 AR_dependent, 3782 AR_delayed 3783 }; 3784 3785 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3786 NamedDecl *PrevMemberDecl, 3787 AccessSpecifier LexicalAS); 3788 3789 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3790 DeclAccessPair FoundDecl); 3791 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3792 DeclAccessPair FoundDecl); 3793 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3794 SourceRange PlacementRange, 3795 CXXRecordDecl *NamingClass, 3796 DeclAccessPair FoundDecl, 3797 bool Diagnose = true); 3798 AccessResult CheckConstructorAccess(SourceLocation Loc, 3799 CXXConstructorDecl *D, 3800 const InitializedEntity &Entity, 3801 AccessSpecifier Access, 3802 bool IsCopyBindingRefToTemp = false); 3803 AccessResult CheckConstructorAccess(SourceLocation Loc, 3804 CXXConstructorDecl *D, 3805 AccessSpecifier Access, 3806 PartialDiagnostic PD); 3807 AccessResult CheckDestructorAccess(SourceLocation Loc, 3808 CXXDestructorDecl *Dtor, 3809 const PartialDiagnostic &PDiag); 3810 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3811 NamedDecl *D, 3812 const PartialDiagnostic &PDiag); 3813 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3814 Expr *ObjectExpr, 3815 Expr *ArgExpr, 3816 DeclAccessPair FoundDecl); 3817 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3818 DeclAccessPair FoundDecl); 3819 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3820 QualType Base, QualType Derived, 3821 const CXXBasePath &Path, 3822 unsigned DiagID, 3823 bool ForceCheck = false, 3824 bool ForceUnprivileged = false); 3825 void CheckLookupAccess(const LookupResult &R); 3826 bool IsSimplyAccessible(NamedDecl *decl, DeclContext *Ctx); 3827 3828 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3829 const MultiLevelTemplateArgumentList &TemplateArgs); 3830 void PerformDependentDiagnostics(const DeclContext *Pattern, 3831 const MultiLevelTemplateArgumentList &TemplateArgs); 3832 3833 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3834 3835 /// A flag to suppress access checking. 3836 bool SuppressAccessChecking; 3837 3838 /// \brief When true, access checking violations are treated as SFINAE 3839 /// failures rather than hard errors. 3840 bool AccessCheckingSFINAE; 3841 3842 void ActOnStartSuppressingAccessChecks(); 3843 void ActOnStopSuppressingAccessChecks(); 3844 3845 enum AbstractDiagSelID { 3846 AbstractNone = -1, 3847 AbstractReturnType, 3848 AbstractParamType, 3849 AbstractVariableType, 3850 AbstractFieldType, 3851 AbstractArrayType 3852 }; 3853 3854 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3855 const PartialDiagnostic &PD); 3856 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3857 3858 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3859 AbstractDiagSelID SelID = AbstractNone); 3860 3861 //===--------------------------------------------------------------------===// 3862 // C++ Overloaded Operators [C++ 13.5] 3863 // 3864 3865 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3866 3867 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3868 3869 //===--------------------------------------------------------------------===// 3870 // C++ Templates [C++ 14] 3871 // 3872 void FilterAcceptableTemplateNames(LookupResult &R); 3873 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3874 3875 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3876 QualType ObjectType, bool EnteringContext, 3877 bool &MemberOfUnknownSpecialization); 3878 3879 TemplateNameKind isTemplateName(Scope *S, 3880 CXXScopeSpec &SS, 3881 bool hasTemplateKeyword, 3882 UnqualifiedId &Name, 3883 ParsedType ObjectType, 3884 bool EnteringContext, 3885 TemplateTy &Template, 3886 bool &MemberOfUnknownSpecialization); 3887 3888 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3889 SourceLocation IILoc, 3890 Scope *S, 3891 const CXXScopeSpec *SS, 3892 TemplateTy &SuggestedTemplate, 3893 TemplateNameKind &SuggestedKind); 3894 3895 void DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3896 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3897 3898 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3899 SourceLocation EllipsisLoc, 3900 SourceLocation KeyLoc, 3901 IdentifierInfo *ParamName, 3902 SourceLocation ParamNameLoc, 3903 unsigned Depth, unsigned Position, 3904 SourceLocation EqualLoc, 3905 ParsedType DefaultArg); 3906 3907 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3908 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3909 unsigned Depth, 3910 unsigned Position, 3911 SourceLocation EqualLoc, 3912 Expr *DefaultArg); 3913 Decl *ActOnTemplateTemplateParameter(Scope *S, 3914 SourceLocation TmpLoc, 3915 TemplateParameterList *Params, 3916 SourceLocation EllipsisLoc, 3917 IdentifierInfo *ParamName, 3918 SourceLocation ParamNameLoc, 3919 unsigned Depth, 3920 unsigned Position, 3921 SourceLocation EqualLoc, 3922 ParsedTemplateArgument DefaultArg); 3923 3924 TemplateParameterList * 3925 ActOnTemplateParameterList(unsigned Depth, 3926 SourceLocation ExportLoc, 3927 SourceLocation TemplateLoc, 3928 SourceLocation LAngleLoc, 3929 Decl **Params, unsigned NumParams, 3930 SourceLocation RAngleLoc); 3931 3932 /// \brief The context in which we are checking a template parameter 3933 /// list. 3934 enum TemplateParamListContext { 3935 TPC_ClassTemplate, 3936 TPC_FunctionTemplate, 3937 TPC_ClassTemplateMember, 3938 TPC_FriendFunctionTemplate, 3939 TPC_FriendFunctionTemplateDefinition, 3940 TPC_TypeAliasTemplate 3941 }; 3942 3943 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3944 TemplateParameterList *OldParams, 3945 TemplateParamListContext TPC); 3946 TemplateParameterList * 3947 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3948 SourceLocation DeclLoc, 3949 const CXXScopeSpec &SS, 3950 TemplateParameterList **ParamLists, 3951 unsigned NumParamLists, 3952 bool IsFriend, 3953 bool &IsExplicitSpecialization, 3954 bool &Invalid); 3955 3956 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3957 SourceLocation KWLoc, CXXScopeSpec &SS, 3958 IdentifierInfo *Name, SourceLocation NameLoc, 3959 AttributeList *Attr, 3960 TemplateParameterList *TemplateParams, 3961 AccessSpecifier AS, 3962 SourceLocation ModulePrivateLoc, 3963 unsigned NumOuterTemplateParamLists, 3964 TemplateParameterList **OuterTemplateParamLists); 3965 3966 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3967 TemplateArgumentListInfo &Out); 3968 3969 void NoteAllFoundTemplates(TemplateName Name); 3970 3971 QualType CheckTemplateIdType(TemplateName Template, 3972 SourceLocation TemplateLoc, 3973 TemplateArgumentListInfo &TemplateArgs); 3974 3975 TypeResult 3976 ActOnTemplateIdType(CXXScopeSpec &SS, SourceLocation TemplateKWLoc, 3977 TemplateTy Template, SourceLocation TemplateLoc, 3978 SourceLocation LAngleLoc, 3979 ASTTemplateArgsPtr TemplateArgs, 3980 SourceLocation RAngleLoc, 3981 bool IsCtorOrDtorName = false); 3982 3983 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3984 /// such as \c class T::template apply<U>. 3985 /// 3986 /// \param TUK 3987 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3988 TypeSpecifierType TagSpec, 3989 SourceLocation TagLoc, 3990 CXXScopeSpec &SS, 3991 SourceLocation TemplateKWLoc, 3992 TemplateTy TemplateD, 3993 SourceLocation TemplateLoc, 3994 SourceLocation LAngleLoc, 3995 ASTTemplateArgsPtr TemplateArgsIn, 3996 SourceLocation RAngleLoc); 3997 3998 3999 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 4000 SourceLocation TemplateKWLoc, 4001 LookupResult &R, 4002 bool RequiresADL, 4003 const TemplateArgumentListInfo *TemplateArgs); 4004 4005 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 4006 SourceLocation TemplateKWLoc, 4007 const DeclarationNameInfo &NameInfo, 4008 const TemplateArgumentListInfo *TemplateArgs); 4009 4010 TemplateNameKind ActOnDependentTemplateName(Scope *S, 4011 CXXScopeSpec &SS, 4012 SourceLocation TemplateKWLoc, 4013 UnqualifiedId &Name, 4014 ParsedType ObjectType, 4015 bool EnteringContext, 4016 TemplateTy &Template); 4017 4018 DeclResult 4019 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 4020 SourceLocation KWLoc, 4021 SourceLocation ModulePrivateLoc, 4022 CXXScopeSpec &SS, 4023 TemplateTy Template, 4024 SourceLocation TemplateNameLoc, 4025 SourceLocation LAngleLoc, 4026 ASTTemplateArgsPtr TemplateArgs, 4027 SourceLocation RAngleLoc, 4028 AttributeList *Attr, 4029 MultiTemplateParamsArg TemplateParameterLists); 4030 4031 Decl *ActOnTemplateDeclarator(Scope *S, 4032 MultiTemplateParamsArg TemplateParameterLists, 4033 Declarator &D); 4034 4035 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 4036 MultiTemplateParamsArg TemplateParameterLists, 4037 Declarator &D); 4038 4039 bool 4040 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 4041 TemplateSpecializationKind NewTSK, 4042 NamedDecl *PrevDecl, 4043 TemplateSpecializationKind PrevTSK, 4044 SourceLocation PrevPtOfInstantiation, 4045 bool &SuppressNew); 4046 4047 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 4048 const TemplateArgumentListInfo &ExplicitTemplateArgs, 4049 LookupResult &Previous); 4050 4051 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 4052 TemplateArgumentListInfo *ExplicitTemplateArgs, 4053 LookupResult &Previous); 4054 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 4055 4056 DeclResult 4057 ActOnExplicitInstantiation(Scope *S, 4058 SourceLocation ExternLoc, 4059 SourceLocation TemplateLoc, 4060 unsigned TagSpec, 4061 SourceLocation KWLoc, 4062 const CXXScopeSpec &SS, 4063 TemplateTy Template, 4064 SourceLocation TemplateNameLoc, 4065 SourceLocation LAngleLoc, 4066 ASTTemplateArgsPtr TemplateArgs, 4067 SourceLocation RAngleLoc, 4068 AttributeList *Attr); 4069 4070 DeclResult 4071 ActOnExplicitInstantiation(Scope *S, 4072 SourceLocation ExternLoc, 4073 SourceLocation TemplateLoc, 4074 unsigned TagSpec, 4075 SourceLocation KWLoc, 4076 CXXScopeSpec &SS, 4077 IdentifierInfo *Name, 4078 SourceLocation NameLoc, 4079 AttributeList *Attr); 4080 4081 DeclResult ActOnExplicitInstantiation(Scope *S, 4082 SourceLocation ExternLoc, 4083 SourceLocation TemplateLoc, 4084 Declarator &D); 4085 4086 TemplateArgumentLoc 4087 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 4088 SourceLocation TemplateLoc, 4089 SourceLocation RAngleLoc, 4090 Decl *Param, 4091 SmallVectorImpl<TemplateArgument> &Converted); 4092 4093 /// \brief Specifies the context in which a particular template 4094 /// argument is being checked. 4095 enum CheckTemplateArgumentKind { 4096 /// \brief The template argument was specified in the code or was 4097 /// instantiated with some deduced template arguments. 4098 CTAK_Specified, 4099 4100 /// \brief The template argument was deduced via template argument 4101 /// deduction. 4102 CTAK_Deduced, 4103 4104 /// \brief The template argument was deduced from an array bound 4105 /// via template argument deduction. 4106 CTAK_DeducedFromArrayBound 4107 }; 4108 4109 bool CheckTemplateArgument(NamedDecl *Param, 4110 const TemplateArgumentLoc &Arg, 4111 NamedDecl *Template, 4112 SourceLocation TemplateLoc, 4113 SourceLocation RAngleLoc, 4114 unsigned ArgumentPackIndex, 4115 SmallVectorImpl<TemplateArgument> &Converted, 4116 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4117 4118 /// \brief Check that the given template arguments can be be provided to 4119 /// the given template, converting the arguments along the way. 4120 /// 4121 /// \param Template The template to which the template arguments are being 4122 /// provided. 4123 /// 4124 /// \param TemplateLoc The location of the template name in the source. 4125 /// 4126 /// \param TemplateArgs The list of template arguments. If the template is 4127 /// a template template parameter, this function may extend the set of 4128 /// template arguments to also include substituted, defaulted template 4129 /// arguments. 4130 /// 4131 /// \param PartialTemplateArgs True if the list of template arguments is 4132 /// intentionally partial, e.g., because we're checking just the initial 4133 /// set of template arguments. 4134 /// 4135 /// \param Converted Will receive the converted, canonicalized template 4136 /// arguments. 4137 /// 4138 /// 4139 /// \param ExpansionIntoFixedList If non-NULL, will be set true to indicate 4140 /// when the template arguments contain a pack expansion that is being 4141 /// expanded into a fixed parameter list. 4142 /// 4143 /// \returns True if an error occurred, false otherwise. 4144 bool CheckTemplateArgumentList(TemplateDecl *Template, 4145 SourceLocation TemplateLoc, 4146 TemplateArgumentListInfo &TemplateArgs, 4147 bool PartialTemplateArgs, 4148 SmallVectorImpl<TemplateArgument> &Converted, 4149 bool *ExpansionIntoFixedList = 0); 4150 4151 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 4152 const TemplateArgumentLoc &Arg, 4153 SmallVectorImpl<TemplateArgument> &Converted); 4154 4155 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 4156 TypeSourceInfo *Arg); 4157 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 4158 TemplateArgument &Converted); 4159 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 4160 QualType InstantiatedParamType, Expr *Arg, 4161 TemplateArgument &Converted, 4162 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4163 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 4164 const TemplateArgumentLoc &Arg); 4165 4166 ExprResult 4167 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 4168 QualType ParamType, 4169 SourceLocation Loc); 4170 ExprResult 4171 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 4172 SourceLocation Loc); 4173 4174 /// \brief Enumeration describing how template parameter lists are compared 4175 /// for equality. 4176 enum TemplateParameterListEqualKind { 4177 /// \brief We are matching the template parameter lists of two templates 4178 /// that might be redeclarations. 4179 /// 4180 /// \code 4181 /// template<typename T> struct X; 4182 /// template<typename T> struct X; 4183 /// \endcode 4184 TPL_TemplateMatch, 4185 4186 /// \brief We are matching the template parameter lists of two template 4187 /// template parameters as part of matching the template parameter lists 4188 /// of two templates that might be redeclarations. 4189 /// 4190 /// \code 4191 /// template<template<int I> class TT> struct X; 4192 /// template<template<int Value> class Other> struct X; 4193 /// \endcode 4194 TPL_TemplateTemplateParmMatch, 4195 4196 /// \brief We are matching the template parameter lists of a template 4197 /// template argument against the template parameter lists of a template 4198 /// template parameter. 4199 /// 4200 /// \code 4201 /// template<template<int Value> class Metafun> struct X; 4202 /// template<int Value> struct integer_c; 4203 /// X<integer_c> xic; 4204 /// \endcode 4205 TPL_TemplateTemplateArgumentMatch 4206 }; 4207 4208 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 4209 TemplateParameterList *Old, 4210 bool Complain, 4211 TemplateParameterListEqualKind Kind, 4212 SourceLocation TemplateArgLoc 4213 = SourceLocation()); 4214 4215 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 4216 4217 /// \brief Called when the parser has parsed a C++ typename 4218 /// specifier, e.g., "typename T::type". 4219 /// 4220 /// \param S The scope in which this typename type occurs. 4221 /// \param TypenameLoc the location of the 'typename' keyword 4222 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4223 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 4224 /// \param IdLoc the location of the identifier. 4225 TypeResult 4226 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4227 const CXXScopeSpec &SS, const IdentifierInfo &II, 4228 SourceLocation IdLoc); 4229 4230 /// \brief Called when the parser has parsed a C++ typename 4231 /// specifier that ends in a template-id, e.g., 4232 /// "typename MetaFun::template apply<T1, T2>". 4233 /// 4234 /// \param S The scope in which this typename type occurs. 4235 /// \param TypenameLoc the location of the 'typename' keyword 4236 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4237 /// \param TemplateLoc the location of the 'template' keyword, if any. 4238 /// \param TemplateName The template name. 4239 /// \param TemplateNameLoc The location of the template name. 4240 /// \param LAngleLoc The location of the opening angle bracket ('<'). 4241 /// \param TemplateArgs The template arguments. 4242 /// \param RAngleLoc The location of the closing angle bracket ('>'). 4243 TypeResult 4244 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4245 const CXXScopeSpec &SS, 4246 SourceLocation TemplateLoc, 4247 TemplateTy Template, 4248 SourceLocation TemplateNameLoc, 4249 SourceLocation LAngleLoc, 4250 ASTTemplateArgsPtr TemplateArgs, 4251 SourceLocation RAngleLoc); 4252 4253 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 4254 SourceLocation KeywordLoc, 4255 NestedNameSpecifierLoc QualifierLoc, 4256 const IdentifierInfo &II, 4257 SourceLocation IILoc); 4258 4259 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 4260 SourceLocation Loc, 4261 DeclarationName Name); 4262 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 4263 4264 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 4265 bool RebuildTemplateParamsInCurrentInstantiation( 4266 TemplateParameterList *Params); 4267 4268 std::string 4269 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4270 const TemplateArgumentList &Args); 4271 4272 std::string 4273 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4274 const TemplateArgument *Args, 4275 unsigned NumArgs); 4276 4277 //===--------------------------------------------------------------------===// 4278 // C++ Variadic Templates (C++0x [temp.variadic]) 4279 //===--------------------------------------------------------------------===// 4280 4281 /// \brief The context in which an unexpanded parameter pack is 4282 /// being diagnosed. 4283 /// 4284 /// Note that the values of this enumeration line up with the first 4285 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4286 enum UnexpandedParameterPackContext { 4287 /// \brief An arbitrary expression. 4288 UPPC_Expression = 0, 4289 4290 /// \brief The base type of a class type. 4291 UPPC_BaseType, 4292 4293 /// \brief The type of an arbitrary declaration. 4294 UPPC_DeclarationType, 4295 4296 /// \brief The type of a data member. 4297 UPPC_DataMemberType, 4298 4299 /// \brief The size of a bit-field. 4300 UPPC_BitFieldWidth, 4301 4302 /// \brief The expression in a static assertion. 4303 UPPC_StaticAssertExpression, 4304 4305 /// \brief The fixed underlying type of an enumeration. 4306 UPPC_FixedUnderlyingType, 4307 4308 /// \brief The enumerator value. 4309 UPPC_EnumeratorValue, 4310 4311 /// \brief A using declaration. 4312 UPPC_UsingDeclaration, 4313 4314 /// \brief A friend declaration. 4315 UPPC_FriendDeclaration, 4316 4317 /// \brief A declaration qualifier. 4318 UPPC_DeclarationQualifier, 4319 4320 /// \brief An initializer. 4321 UPPC_Initializer, 4322 4323 /// \brief A default argument. 4324 UPPC_DefaultArgument, 4325 4326 /// \brief The type of a non-type template parameter. 4327 UPPC_NonTypeTemplateParameterType, 4328 4329 /// \brief The type of an exception. 4330 UPPC_ExceptionType, 4331 4332 /// \brief Partial specialization. 4333 UPPC_PartialSpecialization, 4334 4335 /// \brief Microsoft __if_exists. 4336 UPPC_IfExists, 4337 4338 /// \brief Microsoft __if_not_exists. 4339 UPPC_IfNotExists 4340}; 4341 4342 /// \brief Diagnose unexpanded parameter packs. 4343 /// 4344 /// \param Loc The location at which we should emit the diagnostic. 4345 /// 4346 /// \param UPPC The context in which we are diagnosing unexpanded 4347 /// parameter packs. 4348 /// 4349 /// \param Unexpanded the set of unexpanded parameter packs. 4350 void DiagnoseUnexpandedParameterPacks(SourceLocation Loc, 4351 UnexpandedParameterPackContext UPPC, 4352 const SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4353 4354 /// \brief If the given type contains an unexpanded parameter pack, 4355 /// diagnose the error. 4356 /// 4357 /// \param Loc The source location where a diagnostc should be emitted. 4358 /// 4359 /// \param T The type that is being checked for unexpanded parameter 4360 /// packs. 4361 /// 4362 /// \returns true if an error occurred, false otherwise. 4363 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4364 UnexpandedParameterPackContext UPPC); 4365 4366 /// \brief If the given expression contains an unexpanded parameter 4367 /// pack, diagnose the error. 4368 /// 4369 /// \param E The expression that is being checked for unexpanded 4370 /// parameter packs. 4371 /// 4372 /// \returns true if an error occurred, false otherwise. 4373 bool DiagnoseUnexpandedParameterPack(Expr *E, 4374 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4375 4376 /// \brief If the given nested-name-specifier contains an unexpanded 4377 /// parameter pack, diagnose the error. 4378 /// 4379 /// \param SS The nested-name-specifier that is being checked for 4380 /// unexpanded parameter packs. 4381 /// 4382 /// \returns true if an error occurred, false otherwise. 4383 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4384 UnexpandedParameterPackContext UPPC); 4385 4386 /// \brief If the given name contains an unexpanded parameter pack, 4387 /// diagnose the error. 4388 /// 4389 /// \param NameInfo The name (with source location information) that 4390 /// is being checked for unexpanded parameter packs. 4391 /// 4392 /// \returns true if an error occurred, false otherwise. 4393 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4394 UnexpandedParameterPackContext UPPC); 4395 4396 /// \brief If the given template name contains an unexpanded parameter pack, 4397 /// diagnose the error. 4398 /// 4399 /// \param Loc The location of the template name. 4400 /// 4401 /// \param Template The template name that is being checked for unexpanded 4402 /// parameter packs. 4403 /// 4404 /// \returns true if an error occurred, false otherwise. 4405 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4406 TemplateName Template, 4407 UnexpandedParameterPackContext UPPC); 4408 4409 /// \brief If the given template argument contains an unexpanded parameter 4410 /// pack, diagnose the error. 4411 /// 4412 /// \param Arg The template argument that is being checked for unexpanded 4413 /// parameter packs. 4414 /// 4415 /// \returns true if an error occurred, false otherwise. 4416 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4417 UnexpandedParameterPackContext UPPC); 4418 4419 /// \brief Collect the set of unexpanded parameter packs within the given 4420 /// template argument. 4421 /// 4422 /// \param Arg The template argument that will be traversed to find 4423 /// unexpanded parameter packs. 4424 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4425 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4426 4427 /// \brief Collect the set of unexpanded parameter packs within the given 4428 /// template argument. 4429 /// 4430 /// \param Arg The template argument that will be traversed to find 4431 /// unexpanded parameter packs. 4432 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4433 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4434 4435 /// \brief Collect the set of unexpanded parameter packs within the given 4436 /// type. 4437 /// 4438 /// \param T The type that will be traversed to find 4439 /// unexpanded parameter packs. 4440 void collectUnexpandedParameterPacks(QualType T, 4441 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4442 4443 /// \brief Collect the set of unexpanded parameter packs within the given 4444 /// type. 4445 /// 4446 /// \param TL The type that will be traversed to find 4447 /// unexpanded parameter packs. 4448 void collectUnexpandedParameterPacks(TypeLoc TL, 4449 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4450 4451 /// \brief Collect the set of unexpanded parameter packs within the given 4452 /// nested-name-specifier. 4453 /// 4454 /// \param SS The nested-name-specifier that will be traversed to find 4455 /// unexpanded parameter packs. 4456 void collectUnexpandedParameterPacks(CXXScopeSpec &SS, 4457 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4458 4459 /// \brief Collect the set of unexpanded parameter packs within the given 4460 /// name. 4461 /// 4462 /// \param NameInfo The name that will be traversed to find 4463 /// unexpanded parameter packs. 4464 void collectUnexpandedParameterPacks(const DeclarationNameInfo &NameInfo, 4465 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4466 4467 /// \brief Invoked when parsing a template argument followed by an 4468 /// ellipsis, which creates a pack expansion. 4469 /// 4470 /// \param Arg The template argument preceding the ellipsis, which 4471 /// may already be invalid. 4472 /// 4473 /// \param EllipsisLoc The location of the ellipsis. 4474 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4475 SourceLocation EllipsisLoc); 4476 4477 /// \brief Invoked when parsing a type followed by an ellipsis, which 4478 /// creates a pack expansion. 4479 /// 4480 /// \param Type The type preceding the ellipsis, which will become 4481 /// the pattern of the pack expansion. 4482 /// 4483 /// \param EllipsisLoc The location of the ellipsis. 4484 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4485 4486 /// \brief Construct a pack expansion type from the pattern of the pack 4487 /// expansion. 4488 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4489 SourceLocation EllipsisLoc, 4490 llvm::Optional<unsigned> NumExpansions); 4491 4492 /// \brief Construct a pack expansion type from the pattern of the pack 4493 /// expansion. 4494 QualType CheckPackExpansion(QualType Pattern, 4495 SourceRange PatternRange, 4496 SourceLocation EllipsisLoc, 4497 llvm::Optional<unsigned> NumExpansions); 4498 4499 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4500 /// creates a pack expansion. 4501 /// 4502 /// \param Pattern The expression preceding the ellipsis, which will become 4503 /// the pattern of the pack expansion. 4504 /// 4505 /// \param EllipsisLoc The location of the ellipsis. 4506 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4507 4508 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4509 /// creates a pack expansion. 4510 /// 4511 /// \param Pattern The expression preceding the ellipsis, which will become 4512 /// the pattern of the pack expansion. 4513 /// 4514 /// \param EllipsisLoc The location of the ellipsis. 4515 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4516 llvm::Optional<unsigned> NumExpansions); 4517 4518 /// \brief Determine whether we could expand a pack expansion with the 4519 /// given set of parameter packs into separate arguments by repeatedly 4520 /// transforming the pattern. 4521 /// 4522 /// \param EllipsisLoc The location of the ellipsis that identifies the 4523 /// pack expansion. 4524 /// 4525 /// \param PatternRange The source range that covers the entire pattern of 4526 /// the pack expansion. 4527 /// 4528 /// \param Unexpanded The set of unexpanded parameter packs within the 4529 /// pattern. 4530 /// 4531 /// \param NumUnexpanded The number of unexpanded parameter packs in 4532 /// \p Unexpanded. 4533 /// 4534 /// \param ShouldExpand Will be set to \c true if the transformer should 4535 /// expand the corresponding pack expansions into separate arguments. When 4536 /// set, \c NumExpansions must also be set. 4537 /// 4538 /// \param RetainExpansion Whether the caller should add an unexpanded 4539 /// pack expansion after all of the expanded arguments. This is used 4540 /// when extending explicitly-specified template argument packs per 4541 /// C++0x [temp.arg.explicit]p9. 4542 /// 4543 /// \param NumExpansions The number of separate arguments that will be in 4544 /// the expanded form of the corresponding pack expansion. This is both an 4545 /// input and an output parameter, which can be set by the caller if the 4546 /// number of expansions is known a priori (e.g., due to a prior substitution) 4547 /// and will be set by the callee when the number of expansions is known. 4548 /// The callee must set this value when \c ShouldExpand is \c true; it may 4549 /// set this value in other cases. 4550 /// 4551 /// \returns true if an error occurred (e.g., because the parameter packs 4552 /// are to be instantiated with arguments of different lengths), false 4553 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4554 /// must be set. 4555 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4556 SourceRange PatternRange, 4557 llvm::ArrayRef<UnexpandedParameterPack> Unexpanded, 4558 const MultiLevelTemplateArgumentList &TemplateArgs, 4559 bool &ShouldExpand, 4560 bool &RetainExpansion, 4561 llvm::Optional<unsigned> &NumExpansions); 4562 4563 /// \brief Determine the number of arguments in the given pack expansion 4564 /// type. 4565 /// 4566 /// This routine already assumes that the pack expansion type can be 4567 /// expanded and that the number of arguments in the expansion is 4568 /// consistent across all of the unexpanded parameter packs in its pattern. 4569 unsigned getNumArgumentsInExpansion(QualType T, 4570 const MultiLevelTemplateArgumentList &TemplateArgs); 4571 4572 /// \brief Determine whether the given declarator contains any unexpanded 4573 /// parameter packs. 4574 /// 4575 /// This routine is used by the parser to disambiguate function declarators 4576 /// with an ellipsis prior to the ')', e.g., 4577 /// 4578 /// \code 4579 /// void f(T...); 4580 /// \endcode 4581 /// 4582 /// To determine whether we have an (unnamed) function parameter pack or 4583 /// a variadic function. 4584 /// 4585 /// \returns true if the declarator contains any unexpanded parameter packs, 4586 /// false otherwise. 4587 bool containsUnexpandedParameterPacks(Declarator &D); 4588 4589 //===--------------------------------------------------------------------===// 4590 // C++ Template Argument Deduction (C++ [temp.deduct]) 4591 //===--------------------------------------------------------------------===// 4592 4593 /// \brief Describes the result of template argument deduction. 4594 /// 4595 /// The TemplateDeductionResult enumeration describes the result of 4596 /// template argument deduction, as returned from 4597 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4598 /// structure provides additional information about the results of 4599 /// template argument deduction, e.g., the deduced template argument 4600 /// list (if successful) or the specific template parameters or 4601 /// deduced arguments that were involved in the failure. 4602 enum TemplateDeductionResult { 4603 /// \brief Template argument deduction was successful. 4604 TDK_Success = 0, 4605 /// \brief Template argument deduction exceeded the maximum template 4606 /// instantiation depth (which has already been diagnosed). 4607 TDK_InstantiationDepth, 4608 /// \brief Template argument deduction did not deduce a value 4609 /// for every template parameter. 4610 TDK_Incomplete, 4611 /// \brief Template argument deduction produced inconsistent 4612 /// deduced values for the given template parameter. 4613 TDK_Inconsistent, 4614 /// \brief Template argument deduction failed due to inconsistent 4615 /// cv-qualifiers on a template parameter type that would 4616 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4617 /// but were given a non-const "X". 4618 TDK_Underqualified, 4619 /// \brief Substitution of the deduced template argument values 4620 /// resulted in an error. 4621 TDK_SubstitutionFailure, 4622 /// \brief Substitution of the deduced template argument values 4623 /// into a non-deduced context produced a type or value that 4624 /// produces a type that does not match the original template 4625 /// arguments provided. 4626 TDK_NonDeducedMismatch, 4627 /// \brief When performing template argument deduction for a function 4628 /// template, there were too many call arguments. 4629 TDK_TooManyArguments, 4630 /// \brief When performing template argument deduction for a function 4631 /// template, there were too few call arguments. 4632 TDK_TooFewArguments, 4633 /// \brief The explicitly-specified template arguments were not valid 4634 /// template arguments for the given template. 4635 TDK_InvalidExplicitArguments, 4636 /// \brief The arguments included an overloaded function name that could 4637 /// not be resolved to a suitable function. 4638 TDK_FailedOverloadResolution 4639 }; 4640 4641 TemplateDeductionResult 4642 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4643 const TemplateArgumentList &TemplateArgs, 4644 sema::TemplateDeductionInfo &Info); 4645 4646 TemplateDeductionResult 4647 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4648 TemplateArgumentListInfo &ExplicitTemplateArgs, 4649 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4650 SmallVectorImpl<QualType> &ParamTypes, 4651 QualType *FunctionType, 4652 sema::TemplateDeductionInfo &Info); 4653 4654 /// brief A function argument from which we performed template argument 4655 // deduction for a call. 4656 struct OriginalCallArg { 4657 OriginalCallArg(QualType OriginalParamType, 4658 unsigned ArgIdx, 4659 QualType OriginalArgType) 4660 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4661 OriginalArgType(OriginalArgType) { } 4662 4663 QualType OriginalParamType; 4664 unsigned ArgIdx; 4665 QualType OriginalArgType; 4666 }; 4667 4668 TemplateDeductionResult 4669 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4670 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4671 unsigned NumExplicitlySpecified, 4672 FunctionDecl *&Specialization, 4673 sema::TemplateDeductionInfo &Info, 4674 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4675 4676 TemplateDeductionResult 4677 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4678 TemplateArgumentListInfo *ExplicitTemplateArgs, 4679 Expr **Args, unsigned NumArgs, 4680 FunctionDecl *&Specialization, 4681 sema::TemplateDeductionInfo &Info); 4682 4683 TemplateDeductionResult 4684 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4685 TemplateArgumentListInfo *ExplicitTemplateArgs, 4686 QualType ArgFunctionType, 4687 FunctionDecl *&Specialization, 4688 sema::TemplateDeductionInfo &Info); 4689 4690 TemplateDeductionResult 4691 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4692 QualType ToType, 4693 CXXConversionDecl *&Specialization, 4694 sema::TemplateDeductionInfo &Info); 4695 4696 TemplateDeductionResult 4697 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4698 TemplateArgumentListInfo *ExplicitTemplateArgs, 4699 FunctionDecl *&Specialization, 4700 sema::TemplateDeductionInfo &Info); 4701 4702 /// \brief Result type of DeduceAutoType. 4703 enum DeduceAutoResult { 4704 DAR_Succeeded, 4705 DAR_Failed, 4706 DAR_FailedAlreadyDiagnosed 4707 }; 4708 4709 DeduceAutoResult DeduceAutoType(TypeSourceInfo *AutoType, Expr *&Initializer, 4710 TypeSourceInfo *&Result); 4711 void DiagnoseAutoDeductionFailure(VarDecl *VDecl, Expr *Init); 4712 4713 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4714 FunctionTemplateDecl *FT2, 4715 SourceLocation Loc, 4716 TemplatePartialOrderingContext TPOC, 4717 unsigned NumCallArguments); 4718 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4719 UnresolvedSetIterator SEnd, 4720 TemplatePartialOrderingContext TPOC, 4721 unsigned NumCallArguments, 4722 SourceLocation Loc, 4723 const PartialDiagnostic &NoneDiag, 4724 const PartialDiagnostic &AmbigDiag, 4725 const PartialDiagnostic &CandidateDiag, 4726 bool Complain = true, 4727 QualType TargetType = QualType()); 4728 4729 ClassTemplatePartialSpecializationDecl * 4730 getMoreSpecializedPartialSpecialization( 4731 ClassTemplatePartialSpecializationDecl *PS1, 4732 ClassTemplatePartialSpecializationDecl *PS2, 4733 SourceLocation Loc); 4734 4735 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4736 bool OnlyDeduced, 4737 unsigned Depth, 4738 llvm::SmallBitVector &Used); 4739 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4740 llvm::SmallBitVector &Deduced) { 4741 return MarkDeducedTemplateParameters(Context, FunctionTemplate, Deduced); 4742 } 4743 static void MarkDeducedTemplateParameters(ASTContext &Ctx, 4744 FunctionTemplateDecl *FunctionTemplate, 4745 llvm::SmallBitVector &Deduced); 4746 4747 //===--------------------------------------------------------------------===// 4748 // C++ Template Instantiation 4749 // 4750 4751 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4752 const TemplateArgumentList *Innermost = 0, 4753 bool RelativeToPrimary = false, 4754 const FunctionDecl *Pattern = 0); 4755 4756 /// \brief A template instantiation that is currently in progress. 4757 struct ActiveTemplateInstantiation { 4758 /// \brief The kind of template instantiation we are performing 4759 enum InstantiationKind { 4760 /// We are instantiating a template declaration. The entity is 4761 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4762 TemplateInstantiation, 4763 4764 /// We are instantiating a default argument for a template 4765 /// parameter. The Entity is the template, and 4766 /// TemplateArgs/NumTemplateArguments provides the template 4767 /// arguments as specified. 4768 /// FIXME: Use a TemplateArgumentList 4769 DefaultTemplateArgumentInstantiation, 4770 4771 /// We are instantiating a default argument for a function. 4772 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4773 /// provides the template arguments as specified. 4774 DefaultFunctionArgumentInstantiation, 4775 4776 /// We are substituting explicit template arguments provided for 4777 /// a function template. The entity is a FunctionTemplateDecl. 4778 ExplicitTemplateArgumentSubstitution, 4779 4780 /// We are substituting template argument determined as part of 4781 /// template argument deduction for either a class template 4782 /// partial specialization or a function template. The 4783 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4784 /// a FunctionTemplateDecl. 4785 DeducedTemplateArgumentSubstitution, 4786 4787 /// We are substituting prior template arguments into a new 4788 /// template parameter. The template parameter itself is either a 4789 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4790 PriorTemplateArgumentSubstitution, 4791 4792 /// We are checking the validity of a default template argument that 4793 /// has been used when naming a template-id. 4794 DefaultTemplateArgumentChecking 4795 } Kind; 4796 4797 /// \brief The point of instantiation within the source code. 4798 SourceLocation PointOfInstantiation; 4799 4800 /// \brief The template (or partial specialization) in which we are 4801 /// performing the instantiation, for substitutions of prior template 4802 /// arguments. 4803 NamedDecl *Template; 4804 4805 /// \brief The entity that is being instantiated. 4806 uintptr_t Entity; 4807 4808 /// \brief The list of template arguments we are substituting, if they 4809 /// are not part of the entity. 4810 const TemplateArgument *TemplateArgs; 4811 4812 /// \brief The number of template arguments in TemplateArgs. 4813 unsigned NumTemplateArgs; 4814 4815 /// \brief The template deduction info object associated with the 4816 /// substitution or checking of explicit or deduced template arguments. 4817 sema::TemplateDeductionInfo *DeductionInfo; 4818 4819 /// \brief The source range that covers the construct that cause 4820 /// the instantiation, e.g., the template-id that causes a class 4821 /// template instantiation. 4822 SourceRange InstantiationRange; 4823 4824 ActiveTemplateInstantiation() 4825 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4826 NumTemplateArgs(0), DeductionInfo(0) {} 4827 4828 /// \brief Determines whether this template is an actual instantiation 4829 /// that should be counted toward the maximum instantiation depth. 4830 bool isInstantiationRecord() const; 4831 4832 friend bool operator==(const ActiveTemplateInstantiation &X, 4833 const ActiveTemplateInstantiation &Y) { 4834 if (X.Kind != Y.Kind) 4835 return false; 4836 4837 if (X.Entity != Y.Entity) 4838 return false; 4839 4840 switch (X.Kind) { 4841 case TemplateInstantiation: 4842 return true; 4843 4844 case PriorTemplateArgumentSubstitution: 4845 case DefaultTemplateArgumentChecking: 4846 if (X.Template != Y.Template) 4847 return false; 4848 4849 // Fall through 4850 4851 case DefaultTemplateArgumentInstantiation: 4852 case ExplicitTemplateArgumentSubstitution: 4853 case DeducedTemplateArgumentSubstitution: 4854 case DefaultFunctionArgumentInstantiation: 4855 return X.TemplateArgs == Y.TemplateArgs; 4856 4857 } 4858 4859 llvm_unreachable("Invalid InstantiationKind!"); 4860 } 4861 4862 friend bool operator!=(const ActiveTemplateInstantiation &X, 4863 const ActiveTemplateInstantiation &Y) { 4864 return !(X == Y); 4865 } 4866 }; 4867 4868 /// \brief List of active template instantiations. 4869 /// 4870 /// This vector is treated as a stack. As one template instantiation 4871 /// requires another template instantiation, additional 4872 /// instantiations are pushed onto the stack up to a 4873 /// user-configurable limit LangOptions::InstantiationDepth. 4874 SmallVector<ActiveTemplateInstantiation, 16> 4875 ActiveTemplateInstantiations; 4876 4877 /// \brief Whether we are in a SFINAE context that is not associated with 4878 /// template instantiation. 4879 /// 4880 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4881 /// of a template instantiation or template argument deduction. 4882 bool InNonInstantiationSFINAEContext; 4883 4884 /// \brief The number of ActiveTemplateInstantiation entries in 4885 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4886 /// therefore, should not be counted as part of the instantiation depth. 4887 unsigned NonInstantiationEntries; 4888 4889 /// \brief The last template from which a template instantiation 4890 /// error or warning was produced. 4891 /// 4892 /// This value is used to suppress printing of redundant template 4893 /// instantiation backtraces when there are multiple errors in the 4894 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4895 /// to implement it anywhere else. 4896 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4897 4898 /// \brief The current index into pack expansion arguments that will be 4899 /// used for substitution of parameter packs. 4900 /// 4901 /// The pack expansion index will be -1 to indicate that parameter packs 4902 /// should be instantiated as themselves. Otherwise, the index specifies 4903 /// which argument within the parameter pack will be used for substitution. 4904 int ArgumentPackSubstitutionIndex; 4905 4906 /// \brief RAII object used to change the argument pack substitution index 4907 /// within a \c Sema object. 4908 /// 4909 /// See \c ArgumentPackSubstitutionIndex for more information. 4910 class ArgumentPackSubstitutionIndexRAII { 4911 Sema &Self; 4912 int OldSubstitutionIndex; 4913 4914 public: 4915 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4916 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4917 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4918 } 4919 4920 ~ArgumentPackSubstitutionIndexRAII() { 4921 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4922 } 4923 }; 4924 4925 friend class ArgumentPackSubstitutionRAII; 4926 4927 /// \brief The stack of calls expression undergoing template instantiation. 4928 /// 4929 /// The top of this stack is used by a fixit instantiating unresolved 4930 /// function calls to fix the AST to match the textual change it prints. 4931 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4932 4933 /// \brief For each declaration that involved template argument deduction, the 4934 /// set of diagnostics that were suppressed during that template argument 4935 /// deduction. 4936 /// 4937 /// FIXME: Serialize this structure to the AST file. 4938 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 4939 SuppressedDiagnostics; 4940 4941 /// \brief A stack object to be created when performing template 4942 /// instantiation. 4943 /// 4944 /// Construction of an object of type \c InstantiatingTemplate 4945 /// pushes the current instantiation onto the stack of active 4946 /// instantiations. If the size of this stack exceeds the maximum 4947 /// number of recursive template instantiations, construction 4948 /// produces an error and evaluates true. 4949 /// 4950 /// Destruction of this object will pop the named instantiation off 4951 /// the stack. 4952 struct InstantiatingTemplate { 4953 /// \brief Note that we are instantiating a class template, 4954 /// function template, or a member thereof. 4955 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4956 Decl *Entity, 4957 SourceRange InstantiationRange = SourceRange()); 4958 4959 /// \brief Note that we are instantiating a default argument in a 4960 /// template-id. 4961 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4962 TemplateDecl *Template, 4963 const TemplateArgument *TemplateArgs, 4964 unsigned NumTemplateArgs, 4965 SourceRange InstantiationRange = SourceRange()); 4966 4967 /// \brief Note that we are instantiating a default argument in a 4968 /// template-id. 4969 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4970 FunctionTemplateDecl *FunctionTemplate, 4971 const TemplateArgument *TemplateArgs, 4972 unsigned NumTemplateArgs, 4973 ActiveTemplateInstantiation::InstantiationKind Kind, 4974 sema::TemplateDeductionInfo &DeductionInfo, 4975 SourceRange InstantiationRange = SourceRange()); 4976 4977 /// \brief Note that we are instantiating as part of template 4978 /// argument deduction for a class template partial 4979 /// specialization. 4980 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4981 ClassTemplatePartialSpecializationDecl *PartialSpec, 4982 const TemplateArgument *TemplateArgs, 4983 unsigned NumTemplateArgs, 4984 sema::TemplateDeductionInfo &DeductionInfo, 4985 SourceRange InstantiationRange = SourceRange()); 4986 4987 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4988 ParmVarDecl *Param, 4989 const TemplateArgument *TemplateArgs, 4990 unsigned NumTemplateArgs, 4991 SourceRange InstantiationRange = SourceRange()); 4992 4993 /// \brief Note that we are substituting prior template arguments into a 4994 /// non-type or template template parameter. 4995 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4996 NamedDecl *Template, 4997 NonTypeTemplateParmDecl *Param, 4998 const TemplateArgument *TemplateArgs, 4999 unsigned NumTemplateArgs, 5000 SourceRange InstantiationRange); 5001 5002 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5003 NamedDecl *Template, 5004 TemplateTemplateParmDecl *Param, 5005 const TemplateArgument *TemplateArgs, 5006 unsigned NumTemplateArgs, 5007 SourceRange InstantiationRange); 5008 5009 /// \brief Note that we are checking the default template argument 5010 /// against the template parameter for a given template-id. 5011 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5012 TemplateDecl *Template, 5013 NamedDecl *Param, 5014 const TemplateArgument *TemplateArgs, 5015 unsigned NumTemplateArgs, 5016 SourceRange InstantiationRange); 5017 5018 5019 /// \brief Note that we have finished instantiating this template. 5020 void Clear(); 5021 5022 ~InstantiatingTemplate() { Clear(); } 5023 5024 /// \brief Determines whether we have exceeded the maximum 5025 /// recursive template instantiations. 5026 operator bool() const { return Invalid; } 5027 5028 private: 5029 Sema &SemaRef; 5030 bool Invalid; 5031 bool SavedInNonInstantiationSFINAEContext; 5032 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 5033 SourceRange InstantiationRange); 5034 5035 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 5036 5037 InstantiatingTemplate& 5038 operator=(const InstantiatingTemplate&); // not implemented 5039 }; 5040 5041 void PrintInstantiationStack(); 5042 5043 /// \brief Determines whether we are currently in a context where 5044 /// template argument substitution failures are not considered 5045 /// errors. 5046 /// 5047 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 5048 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 5049 /// template-deduction context object, which can be used to capture 5050 /// diagnostics that will be suppressed. 5051 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 5052 5053 /// \brief RAII class used to determine whether SFINAE has 5054 /// trapped any errors that occur during template argument 5055 /// deduction.` 5056 class SFINAETrap { 5057 Sema &SemaRef; 5058 unsigned PrevSFINAEErrors; 5059 bool PrevInNonInstantiationSFINAEContext; 5060 bool PrevAccessCheckingSFINAE; 5061 5062 public: 5063 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 5064 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 5065 PrevInNonInstantiationSFINAEContext( 5066 SemaRef.InNonInstantiationSFINAEContext), 5067 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 5068 { 5069 if (!SemaRef.isSFINAEContext()) 5070 SemaRef.InNonInstantiationSFINAEContext = true; 5071 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 5072 } 5073 5074 ~SFINAETrap() { 5075 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 5076 SemaRef.InNonInstantiationSFINAEContext 5077 = PrevInNonInstantiationSFINAEContext; 5078 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 5079 } 5080 5081 /// \brief Determine whether any SFINAE errors have been trapped. 5082 bool hasErrorOccurred() const { 5083 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 5084 } 5085 }; 5086 5087 /// \brief The current instantiation scope used to store local 5088 /// variables. 5089 LocalInstantiationScope *CurrentInstantiationScope; 5090 5091 /// \brief The number of typos corrected by CorrectTypo. 5092 unsigned TyposCorrected; 5093 5094 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 5095 UnqualifiedTyposCorrectedMap; 5096 5097 /// \brief A cache containing the results of typo correction for unqualified 5098 /// name lookup. 5099 /// 5100 /// The string is the string that we corrected to (which may be empty, if 5101 /// there was no correction), while the boolean will be true when the 5102 /// string represents a keyword. 5103 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 5104 5105 /// \brief Worker object for performing CFG-based warnings. 5106 sema::AnalysisBasedWarnings AnalysisWarnings; 5107 5108 /// \brief An entity for which implicit template instantiation is required. 5109 /// 5110 /// The source location associated with the declaration is the first place in 5111 /// the source code where the declaration was "used". It is not necessarily 5112 /// the point of instantiation (which will be either before or after the 5113 /// namespace-scope declaration that triggered this implicit instantiation), 5114 /// However, it is the location that diagnostics should generally refer to, 5115 /// because users will need to know what code triggered the instantiation. 5116 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 5117 5118 /// \brief The queue of implicit template instantiations that are required 5119 /// but have not yet been performed. 5120 std::deque<PendingImplicitInstantiation> PendingInstantiations; 5121 5122 /// \brief The queue of implicit template instantiations that are required 5123 /// and must be performed within the current local scope. 5124 /// 5125 /// This queue is only used for member functions of local classes in 5126 /// templates, which must be instantiated in the same scope as their 5127 /// enclosing function, so that they can reference function-local 5128 /// types, static variables, enumerators, etc. 5129 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 5130 5131 void PerformPendingInstantiations(bool LocalOnly = false); 5132 5133 TypeSourceInfo *SubstType(TypeSourceInfo *T, 5134 const MultiLevelTemplateArgumentList &TemplateArgs, 5135 SourceLocation Loc, DeclarationName Entity); 5136 5137 QualType SubstType(QualType T, 5138 const MultiLevelTemplateArgumentList &TemplateArgs, 5139 SourceLocation Loc, DeclarationName Entity); 5140 5141 TypeSourceInfo *SubstType(TypeLoc TL, 5142 const MultiLevelTemplateArgumentList &TemplateArgs, 5143 SourceLocation Loc, DeclarationName Entity); 5144 5145 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 5146 const MultiLevelTemplateArgumentList &TemplateArgs, 5147 SourceLocation Loc, 5148 DeclarationName Entity); 5149 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 5150 const MultiLevelTemplateArgumentList &TemplateArgs, 5151 int indexAdjustment, 5152 llvm::Optional<unsigned> NumExpansions, 5153 bool ExpectParameterPack); 5154 bool SubstParmTypes(SourceLocation Loc, 5155 ParmVarDecl **Params, unsigned NumParams, 5156 const MultiLevelTemplateArgumentList &TemplateArgs, 5157 SmallVectorImpl<QualType> &ParamTypes, 5158 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 5159 ExprResult SubstExpr(Expr *E, 5160 const MultiLevelTemplateArgumentList &TemplateArgs); 5161 5162 /// \brief Substitute the given template arguments into a list of 5163 /// expressions, expanding pack expansions if required. 5164 /// 5165 /// \param Exprs The list of expressions to substitute into. 5166 /// 5167 /// \param NumExprs The number of expressions in \p Exprs. 5168 /// 5169 /// \param IsCall Whether this is some form of call, in which case 5170 /// default arguments will be dropped. 5171 /// 5172 /// \param TemplateArgs The set of template arguments to substitute. 5173 /// 5174 /// \param Outputs Will receive all of the substituted arguments. 5175 /// 5176 /// \returns true if an error occurred, false otherwise. 5177 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 5178 const MultiLevelTemplateArgumentList &TemplateArgs, 5179 SmallVectorImpl<Expr *> &Outputs); 5180 5181 StmtResult SubstStmt(Stmt *S, 5182 const MultiLevelTemplateArgumentList &TemplateArgs); 5183 5184 Decl *SubstDecl(Decl *D, DeclContext *Owner, 5185 const MultiLevelTemplateArgumentList &TemplateArgs); 5186 5187 bool 5188 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 5189 CXXRecordDecl *Pattern, 5190 const MultiLevelTemplateArgumentList &TemplateArgs); 5191 5192 bool 5193 InstantiateClass(SourceLocation PointOfInstantiation, 5194 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 5195 const MultiLevelTemplateArgumentList &TemplateArgs, 5196 TemplateSpecializationKind TSK, 5197 bool Complain = true); 5198 5199 struct LateInstantiatedAttribute { 5200 const Attr *TmplAttr; 5201 LocalInstantiationScope *Scope; 5202 Decl *NewDecl; 5203 5204 LateInstantiatedAttribute(const Attr *A, LocalInstantiationScope *S, 5205 Decl *D) 5206 : TmplAttr(A), Scope(S), NewDecl(D) 5207 { } 5208 }; 5209 typedef SmallVector<LateInstantiatedAttribute, 16> LateInstantiatedAttrVec; 5210 5211 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 5212 const Decl *Pattern, Decl *Inst, 5213 LateInstantiatedAttrVec *LateAttrs = 0, 5214 LocalInstantiationScope *OuterMostScope = 0); 5215 5216 bool 5217 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 5218 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5219 TemplateSpecializationKind TSK, 5220 bool Complain = true); 5221 5222 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 5223 CXXRecordDecl *Instantiation, 5224 const MultiLevelTemplateArgumentList &TemplateArgs, 5225 TemplateSpecializationKind TSK); 5226 5227 void InstantiateClassTemplateSpecializationMembers( 5228 SourceLocation PointOfInstantiation, 5229 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5230 TemplateSpecializationKind TSK); 5231 5232 NestedNameSpecifierLoc 5233 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 5234 const MultiLevelTemplateArgumentList &TemplateArgs); 5235 5236 DeclarationNameInfo 5237 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 5238 const MultiLevelTemplateArgumentList &TemplateArgs); 5239 TemplateName 5240 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 5241 SourceLocation Loc, 5242 const MultiLevelTemplateArgumentList &TemplateArgs); 5243 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 5244 TemplateArgumentListInfo &Result, 5245 const MultiLevelTemplateArgumentList &TemplateArgs); 5246 5247 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 5248 FunctionDecl *Function, 5249 bool Recursive = false, 5250 bool DefinitionRequired = false); 5251 void InstantiateStaticDataMemberDefinition( 5252 SourceLocation PointOfInstantiation, 5253 VarDecl *Var, 5254 bool Recursive = false, 5255 bool DefinitionRequired = false); 5256 5257 void InstantiateMemInitializers(CXXConstructorDecl *New, 5258 const CXXConstructorDecl *Tmpl, 5259 const MultiLevelTemplateArgumentList &TemplateArgs); 5260 bool InstantiateInitializer(Expr *Init, 5261 const MultiLevelTemplateArgumentList &TemplateArgs, 5262 SourceLocation &LParenLoc, 5263 ASTOwningVector<Expr*> &NewArgs, 5264 SourceLocation &RParenLoc); 5265 5266 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 5267 const MultiLevelTemplateArgumentList &TemplateArgs); 5268 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 5269 const MultiLevelTemplateArgumentList &TemplateArgs); 5270 5271 // Objective-C declarations. 5272 enum ObjCContainerKind { 5273 OCK_None = -1, 5274 OCK_Interface = 0, 5275 OCK_Protocol, 5276 OCK_Category, 5277 OCK_ClassExtension, 5278 OCK_Implementation, 5279 OCK_CategoryImplementation 5280 }; 5281 ObjCContainerKind getObjCContainerKind() const; 5282 5283 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 5284 IdentifierInfo *ClassName, 5285 SourceLocation ClassLoc, 5286 IdentifierInfo *SuperName, 5287 SourceLocation SuperLoc, 5288 Decl * const *ProtoRefs, 5289 unsigned NumProtoRefs, 5290 const SourceLocation *ProtoLocs, 5291 SourceLocation EndProtoLoc, 5292 AttributeList *AttrList); 5293 5294 Decl *ActOnCompatiblityAlias( 5295 SourceLocation AtCompatibilityAliasLoc, 5296 IdentifierInfo *AliasName, SourceLocation AliasLocation, 5297 IdentifierInfo *ClassName, SourceLocation ClassLocation); 5298 5299 bool CheckForwardProtocolDeclarationForCircularDependency( 5300 IdentifierInfo *PName, 5301 SourceLocation &PLoc, SourceLocation PrevLoc, 5302 const ObjCList<ObjCProtocolDecl> &PList); 5303 5304 Decl *ActOnStartProtocolInterface( 5305 SourceLocation AtProtoInterfaceLoc, 5306 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 5307 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 5308 const SourceLocation *ProtoLocs, 5309 SourceLocation EndProtoLoc, 5310 AttributeList *AttrList); 5311 5312 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 5313 IdentifierInfo *ClassName, 5314 SourceLocation ClassLoc, 5315 IdentifierInfo *CategoryName, 5316 SourceLocation CategoryLoc, 5317 Decl * const *ProtoRefs, 5318 unsigned NumProtoRefs, 5319 const SourceLocation *ProtoLocs, 5320 SourceLocation EndProtoLoc); 5321 5322 Decl *ActOnStartClassImplementation( 5323 SourceLocation AtClassImplLoc, 5324 IdentifierInfo *ClassName, SourceLocation ClassLoc, 5325 IdentifierInfo *SuperClassname, 5326 SourceLocation SuperClassLoc); 5327 5328 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 5329 IdentifierInfo *ClassName, 5330 SourceLocation ClassLoc, 5331 IdentifierInfo *CatName, 5332 SourceLocation CatLoc); 5333 5334 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc, 5335 IdentifierInfo **IdentList, 5336 SourceLocation *IdentLocs, 5337 unsigned NumElts); 5338 5339 DeclGroupPtrTy ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 5340 const IdentifierLocPair *IdentList, 5341 unsigned NumElts, 5342 AttributeList *attrList); 5343 5344 void FindProtocolDeclaration(bool WarnOnDeclarations, 5345 const IdentifierLocPair *ProtocolId, 5346 unsigned NumProtocols, 5347 SmallVectorImpl<Decl *> &Protocols); 5348 5349 /// Ensure attributes are consistent with type. 5350 /// \param [in, out] Attributes The attributes to check; they will 5351 /// be modified to be consistent with \arg PropertyTy. 5352 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5353 SourceLocation Loc, 5354 unsigned &Attributes); 5355 5356 /// Process the specified property declaration and create decls for the 5357 /// setters and getters as needed. 5358 /// \param property The property declaration being processed 5359 /// \param DC The semantic container for the property 5360 /// \param redeclaredProperty Declaration for property if redeclared 5361 /// in class extension. 5362 /// \param lexicalDC Container for redeclaredProperty. 5363 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5364 ObjCContainerDecl *DC, 5365 ObjCPropertyDecl *redeclaredProperty = 0, 5366 ObjCContainerDecl *lexicalDC = 0); 5367 5368 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5369 ObjCPropertyDecl *SuperProperty, 5370 const IdentifierInfo *Name); 5371 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5372 5373 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5374 ObjCMethodDecl *MethodDecl, 5375 bool IsInstance); 5376 5377 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5378 5379 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5380 ObjCInterfaceDecl *ID); 5381 5382 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5383 ObjCProtocolDecl *PDecl); 5384 5385 Decl *ActOnAtEnd(Scope *S, SourceRange AtEnd, 5386 Decl **allMethods = 0, unsigned allNum = 0, 5387 Decl **allProperties = 0, unsigned pNum = 0, 5388 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5389 5390 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5391 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5392 Selector GetterSel, Selector SetterSel, 5393 bool *OverridingProperty, 5394 tok::ObjCKeywordKind MethodImplKind, 5395 DeclContext *lexicalDC = 0); 5396 5397 Decl *ActOnPropertyImplDecl(Scope *S, 5398 SourceLocation AtLoc, 5399 SourceLocation PropertyLoc, 5400 bool ImplKind, 5401 IdentifierInfo *PropertyId, 5402 IdentifierInfo *PropertyIvar, 5403 SourceLocation PropertyIvarLoc); 5404 5405 enum ObjCSpecialMethodKind { 5406 OSMK_None, 5407 OSMK_Alloc, 5408 OSMK_New, 5409 OSMK_Copy, 5410 OSMK_RetainingInit, 5411 OSMK_NonRetainingInit 5412 }; 5413 5414 struct ObjCArgInfo { 5415 IdentifierInfo *Name; 5416 SourceLocation NameLoc; 5417 // The Type is null if no type was specified, and the DeclSpec is invalid 5418 // in this case. 5419 ParsedType Type; 5420 ObjCDeclSpec DeclSpec; 5421 5422 /// ArgAttrs - Attribute list for this argument. 5423 AttributeList *ArgAttrs; 5424 }; 5425 5426 Decl *ActOnMethodDeclaration( 5427 Scope *S, 5428 SourceLocation BeginLoc, // location of the + or -. 5429 SourceLocation EndLoc, // location of the ; or {. 5430 tok::TokenKind MethodType, 5431 ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5432 ArrayRef<SourceLocation> SelectorLocs, Selector Sel, 5433 // optional arguments. The number of types/arguments is obtained 5434 // from the Sel.getNumArgs(). 5435 ObjCArgInfo *ArgInfo, 5436 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5437 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5438 bool isVariadic, bool MethodDefinition); 5439 5440 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5441 // Will search "local" class/category implementations for a method decl. 5442 // Will also search in class's root looking for instance method. 5443 // Returns 0 if no method is found. 5444 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5445 ObjCInterfaceDecl *CDecl); 5446 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5447 ObjCInterfaceDecl *ClassDecl); 5448 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5449 const ObjCObjectPointerType *OPT, 5450 bool IsInstance); 5451 ObjCMethodDecl *LookupMethodInObjectType(Selector Sel, QualType Ty, 5452 bool IsInstance); 5453 5454 bool inferObjCARCLifetime(ValueDecl *decl); 5455 5456 ExprResult 5457 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5458 Expr *BaseExpr, 5459 SourceLocation OpLoc, 5460 DeclarationName MemberName, 5461 SourceLocation MemberLoc, 5462 SourceLocation SuperLoc, QualType SuperType, 5463 bool Super); 5464 5465 ExprResult 5466 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5467 IdentifierInfo &propertyName, 5468 SourceLocation receiverNameLoc, 5469 SourceLocation propertyNameLoc); 5470 5471 ObjCMethodDecl *tryCaptureObjCSelf(SourceLocation Loc); 5472 5473 /// \brief Describes the kind of message expression indicated by a message 5474 /// send that starts with an identifier. 5475 enum ObjCMessageKind { 5476 /// \brief The message is sent to 'super'. 5477 ObjCSuperMessage, 5478 /// \brief The message is an instance message. 5479 ObjCInstanceMessage, 5480 /// \brief The message is a class message, and the identifier is a type 5481 /// name. 5482 ObjCClassMessage 5483 }; 5484 5485 ObjCMessageKind getObjCMessageKind(Scope *S, 5486 IdentifierInfo *Name, 5487 SourceLocation NameLoc, 5488 bool IsSuper, 5489 bool HasTrailingDot, 5490 ParsedType &ReceiverType); 5491 5492 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5493 Selector Sel, 5494 SourceLocation LBracLoc, 5495 ArrayRef<SourceLocation> SelectorLocs, 5496 SourceLocation RBracLoc, 5497 MultiExprArg Args); 5498 5499 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5500 QualType ReceiverType, 5501 SourceLocation SuperLoc, 5502 Selector Sel, 5503 ObjCMethodDecl *Method, 5504 SourceLocation LBracLoc, 5505 ArrayRef<SourceLocation> SelectorLocs, 5506 SourceLocation RBracLoc, 5507 MultiExprArg Args, 5508 bool isImplicit = false); 5509 5510 ExprResult BuildClassMessageImplicit(QualType ReceiverType, 5511 bool isSuperReceiver, 5512 SourceLocation Loc, 5513 Selector Sel, 5514 ObjCMethodDecl *Method, 5515 MultiExprArg Args); 5516 5517 ExprResult ActOnClassMessage(Scope *S, 5518 ParsedType Receiver, 5519 Selector Sel, 5520 SourceLocation LBracLoc, 5521 ArrayRef<SourceLocation> SelectorLocs, 5522 SourceLocation RBracLoc, 5523 MultiExprArg Args); 5524 5525 ExprResult BuildInstanceMessage(Expr *Receiver, 5526 QualType ReceiverType, 5527 SourceLocation SuperLoc, 5528 Selector Sel, 5529 ObjCMethodDecl *Method, 5530 SourceLocation LBracLoc, 5531 ArrayRef<SourceLocation> SelectorLocs, 5532 SourceLocation RBracLoc, 5533 MultiExprArg Args, 5534 bool isImplicit = false); 5535 5536 ExprResult BuildInstanceMessageImplicit(Expr *Receiver, 5537 QualType ReceiverType, 5538 SourceLocation Loc, 5539 Selector Sel, 5540 ObjCMethodDecl *Method, 5541 MultiExprArg Args); 5542 5543 ExprResult ActOnInstanceMessage(Scope *S, 5544 Expr *Receiver, 5545 Selector Sel, 5546 SourceLocation LBracLoc, 5547 ArrayRef<SourceLocation> SelectorLocs, 5548 SourceLocation RBracLoc, 5549 MultiExprArg Args); 5550 5551 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5552 ObjCBridgeCastKind Kind, 5553 SourceLocation BridgeKeywordLoc, 5554 TypeSourceInfo *TSInfo, 5555 Expr *SubExpr); 5556 5557 ExprResult ActOnObjCBridgedCast(Scope *S, 5558 SourceLocation LParenLoc, 5559 ObjCBridgeCastKind Kind, 5560 SourceLocation BridgeKeywordLoc, 5561 ParsedType Type, 5562 SourceLocation RParenLoc, 5563 Expr *SubExpr); 5564 5565 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5566 5567 /// \brief Check whether the given new method is a valid override of the 5568 /// given overridden method, and set any properties that should be inherited. 5569 void CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5570 const ObjCMethodDecl *Overridden, 5571 bool IsImplementation); 5572 5573 /// \brief Check whether the given method overrides any methods in its class, 5574 /// calling \c CheckObjCMethodOverride for each overridden method. 5575 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5576 5577 enum PragmaOptionsAlignKind { 5578 POAK_Native, // #pragma options align=native 5579 POAK_Natural, // #pragma options align=natural 5580 POAK_Packed, // #pragma options align=packed 5581 POAK_Power, // #pragma options align=power 5582 POAK_Mac68k, // #pragma options align=mac68k 5583 POAK_Reset // #pragma options align=reset 5584 }; 5585 5586 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5587 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5588 SourceLocation PragmaLoc, 5589 SourceLocation KindLoc); 5590 5591 enum PragmaPackKind { 5592 PPK_Default, // #pragma pack([n]) 5593 PPK_Show, // #pragma pack(show), only supported by MSVC. 5594 PPK_Push, // #pragma pack(push, [identifier], [n]) 5595 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5596 }; 5597 5598 enum PragmaMSStructKind { 5599 PMSST_OFF, // #pragms ms_struct off 5600 PMSST_ON // #pragms ms_struct on 5601 }; 5602 5603 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5604 void ActOnPragmaPack(PragmaPackKind Kind, 5605 IdentifierInfo *Name, 5606 Expr *Alignment, 5607 SourceLocation PragmaLoc, 5608 SourceLocation LParenLoc, 5609 SourceLocation RParenLoc); 5610 5611 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5612 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5613 5614 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5615 void ActOnPragmaUnused(const Token &Identifier, 5616 Scope *curScope, 5617 SourceLocation PragmaLoc); 5618 5619 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5620 void ActOnPragmaVisibility(const IdentifierInfo* VisType, 5621 SourceLocation PragmaLoc); 5622 5623 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II, 5624 SourceLocation Loc); 5625 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5626 5627 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5628 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5629 SourceLocation PragmaLoc, 5630 SourceLocation WeakNameLoc); 5631 5632 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5633 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5634 IdentifierInfo* AliasName, 5635 SourceLocation PragmaLoc, 5636 SourceLocation WeakNameLoc, 5637 SourceLocation AliasNameLoc); 5638 5639 /// ActOnPragmaFPContract - Called on well formed 5640 /// #pragma {STDC,OPENCL} FP_CONTRACT 5641 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5642 5643 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5644 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5645 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5646 5647 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5648 void AddMsStructLayoutForRecord(RecordDecl *RD); 5649 5650 /// FreePackedContext - Deallocate and null out PackContext. 5651 void FreePackedContext(); 5652 5653 /// PushNamespaceVisibilityAttr - Note that we've entered a 5654 /// namespace with a visibility attribute. 5655 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr, 5656 SourceLocation Loc); 5657 5658 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5659 /// add an appropriate visibility attribute. 5660 void AddPushedVisibilityAttribute(Decl *RD); 5661 5662 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5663 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5664 void PopPragmaVisibility(bool IsNamespaceEnd, SourceLocation EndLoc); 5665 5666 /// FreeVisContext - Deallocate and null out VisContext. 5667 void FreeVisContext(); 5668 5669 /// AddCFAuditedAttribute - Check whether we're currently within 5670 /// '#pragma clang arc_cf_code_audited' and, if so, consider adding 5671 /// the appropriate attribute. 5672 void AddCFAuditedAttribute(Decl *D); 5673 5674 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5675 void AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E); 5676 void AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *T); 5677 5678 /// \brief The kind of conversion being performed. 5679 enum CheckedConversionKind { 5680 /// \brief An implicit conversion. 5681 CCK_ImplicitConversion, 5682 /// \brief A C-style cast. 5683 CCK_CStyleCast, 5684 /// \brief A functional-style cast. 5685 CCK_FunctionalCast, 5686 /// \brief A cast other than a C-style cast. 5687 CCK_OtherCast 5688 }; 5689 5690 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5691 /// cast. If there is already an implicit cast, merge into the existing one. 5692 /// If isLvalue, the result of the cast is an lvalue. 5693 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5694 ExprValueKind VK = VK_RValue, 5695 const CXXCastPath *BasePath = 0, 5696 CheckedConversionKind CCK 5697 = CCK_ImplicitConversion); 5698 5699 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5700 /// to the conversion from scalar type ScalarTy to the Boolean type. 5701 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5702 5703 /// IgnoredValueConversions - Given that an expression's result is 5704 /// syntactically ignored, perform any conversions that are 5705 /// required. 5706 ExprResult IgnoredValueConversions(Expr *E); 5707 5708 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5709 // functions and arrays to their respective pointers (C99 6.3.2.1). 5710 ExprResult UsualUnaryConversions(Expr *E); 5711 5712 // DefaultFunctionArrayConversion - converts functions and arrays 5713 // to their respective pointers (C99 6.3.2.1). 5714 ExprResult DefaultFunctionArrayConversion(Expr *E); 5715 5716 // DefaultFunctionArrayLvalueConversion - converts functions and 5717 // arrays to their respective pointers and performs the 5718 // lvalue-to-rvalue conversion. 5719 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5720 5721 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5722 // the operand. This is DefaultFunctionArrayLvalueConversion, 5723 // except that it assumes the operand isn't of function or array 5724 // type. 5725 ExprResult DefaultLvalueConversion(Expr *E); 5726 5727 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5728 // do not have a prototype. Integer promotions are performed on each 5729 // argument, and arguments that have type float are promoted to double. 5730 ExprResult DefaultArgumentPromotion(Expr *E); 5731 5732 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5733 enum VariadicCallType { 5734 VariadicFunction, 5735 VariadicBlock, 5736 VariadicMethod, 5737 VariadicConstructor, 5738 VariadicDoesNotApply 5739 }; 5740 5741 /// GatherArgumentsForCall - Collector argument expressions for various 5742 /// form of call prototypes. 5743 bool GatherArgumentsForCall(SourceLocation CallLoc, 5744 FunctionDecl *FDecl, 5745 const FunctionProtoType *Proto, 5746 unsigned FirstProtoArg, 5747 Expr **Args, unsigned NumArgs, 5748 SmallVector<Expr *, 8> &AllArgs, 5749 VariadicCallType CallType = VariadicDoesNotApply); 5750 5751 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5752 // will warn if the resulting type is not a POD type. 5753 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5754 FunctionDecl *FDecl); 5755 5756 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5757 // operands and then handles various conversions that are common to binary 5758 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5759 // routine returns the first non-arithmetic type found. The client is 5760 // responsible for emitting appropriate error diagnostics. 5761 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS, 5762 bool IsCompAssign = false); 5763 5764 /// AssignConvertType - All of the 'assignment' semantic checks return this 5765 /// enum to indicate whether the assignment was allowed. These checks are 5766 /// done for simple assignments, as well as initialization, return from 5767 /// function, argument passing, etc. The query is phrased in terms of a 5768 /// source and destination type. 5769 enum AssignConvertType { 5770 /// Compatible - the types are compatible according to the standard. 5771 Compatible, 5772 5773 /// PointerToInt - The assignment converts a pointer to an int, which we 5774 /// accept as an extension. 5775 PointerToInt, 5776 5777 /// IntToPointer - The assignment converts an int to a pointer, which we 5778 /// accept as an extension. 5779 IntToPointer, 5780 5781 /// FunctionVoidPointer - The assignment is between a function pointer and 5782 /// void*, which the standard doesn't allow, but we accept as an extension. 5783 FunctionVoidPointer, 5784 5785 /// IncompatiblePointer - The assignment is between two pointers types that 5786 /// are not compatible, but we accept them as an extension. 5787 IncompatiblePointer, 5788 5789 /// IncompatiblePointer - The assignment is between two pointers types which 5790 /// point to integers which have a different sign, but are otherwise 5791 /// identical. This is a subset of the above, but broken out because it's by 5792 /// far the most common case of incompatible pointers. 5793 IncompatiblePointerSign, 5794 5795 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5796 /// c/v/r qualifiers, which we accept as an extension. 5797 CompatiblePointerDiscardsQualifiers, 5798 5799 /// IncompatiblePointerDiscardsQualifiers - The assignment 5800 /// discards qualifiers that we don't permit to be discarded, 5801 /// like address spaces. 5802 IncompatiblePointerDiscardsQualifiers, 5803 5804 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5805 /// nested pointer types, and the qualifiers other than the first two 5806 /// levels differ e.g. char ** -> const char **, but we accept them as an 5807 /// extension. 5808 IncompatibleNestedPointerQualifiers, 5809 5810 /// IncompatibleVectors - The assignment is between two vector types that 5811 /// have the same size, which we accept as an extension. 5812 IncompatibleVectors, 5813 5814 /// IntToBlockPointer - The assignment converts an int to a block 5815 /// pointer. We disallow this. 5816 IntToBlockPointer, 5817 5818 /// IncompatibleBlockPointer - The assignment is between two block 5819 /// pointers types that are not compatible. 5820 IncompatibleBlockPointer, 5821 5822 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5823 /// id type and something else (that is incompatible with it). For example, 5824 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5825 IncompatibleObjCQualifiedId, 5826 5827 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 5828 /// object with __weak qualifier. 5829 IncompatibleObjCWeakRef, 5830 5831 /// Incompatible - We reject this conversion outright, it is invalid to 5832 /// represent it in the AST. 5833 Incompatible 5834 }; 5835 5836 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5837 /// assignment conversion type specified by ConvTy. This returns true if the 5838 /// conversion was invalid or false if the conversion was accepted. 5839 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5840 SourceLocation Loc, 5841 QualType DstType, QualType SrcType, 5842 Expr *SrcExpr, AssignmentAction Action, 5843 bool *Complained = 0); 5844 5845 /// CheckAssignmentConstraints - Perform type checking for assignment, 5846 /// argument passing, variable initialization, and function return values. 5847 /// C99 6.5.16. 5848 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5849 QualType LHSType, 5850 QualType RHSType); 5851 5852 /// Check assignment constraints and prepare for a conversion of the 5853 /// RHS to the LHS type. 5854 AssignConvertType CheckAssignmentConstraints(QualType LHSType, 5855 ExprResult &RHS, 5856 CastKind &Kind); 5857 5858 // CheckSingleAssignmentConstraints - Currently used by 5859 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5860 // this routine performs the default function/array converions. 5861 AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType, 5862 ExprResult &RHS, 5863 bool Diagnose = true); 5864 5865 // \brief If the lhs type is a transparent union, check whether we 5866 // can initialize the transparent union with the given expression. 5867 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType, 5868 ExprResult &RHS); 5869 5870 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5871 5872 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5873 5874 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5875 AssignmentAction Action, 5876 bool AllowExplicit = false); 5877 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5878 AssignmentAction Action, 5879 bool AllowExplicit, 5880 ImplicitConversionSequence& ICS); 5881 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5882 const ImplicitConversionSequence& ICS, 5883 AssignmentAction Action, 5884 CheckedConversionKind CCK 5885 = CCK_ImplicitConversion); 5886 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5887 const StandardConversionSequence& SCS, 5888 AssignmentAction Action, 5889 CheckedConversionKind CCK); 5890 5891 /// the following "Check" methods will return a valid/converted QualType 5892 /// or a null QualType (indicating an error diagnostic was issued). 5893 5894 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5895 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS, 5896 ExprResult &RHS); 5897 QualType CheckPointerToMemberOperands( // C++ 5.5 5898 ExprResult &LHS, ExprResult &RHS, ExprValueKind &VK, 5899 SourceLocation OpLoc, bool isIndirect); 5900 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5901 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign, 5902 bool IsDivide); 5903 QualType CheckRemainderOperands( // C99 6.5.5 5904 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5905 bool IsCompAssign = false); 5906 QualType CheckAdditionOperands( // C99 6.5.6 5907 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5908 QualType* CompLHSTy = 0); 5909 QualType CheckSubtractionOperands( // C99 6.5.6 5910 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5911 QualType* CompLHSTy = 0); 5912 QualType CheckShiftOperands( // C99 6.5.7 5913 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 5914 bool IsCompAssign = false); 5915 QualType CheckCompareOperands( // C99 6.5.8/9 5916 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned OpaqueOpc, 5917 bool isRelational); 5918 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 5919 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5920 bool IsCompAssign = false); 5921 QualType CheckLogicalOperands( // C99 6.5.[13,14] 5922 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc); 5923 // CheckAssignmentOperands is used for both simple and compound assignment. 5924 // For simple assignment, pass both expressions and a null converted type. 5925 // For compound assignment, pass both expressions and the converted type. 5926 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 5927 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType); 5928 5929 ExprResult checkPseudoObjectIncDec(Scope *S, SourceLocation OpLoc, 5930 UnaryOperatorKind Opcode, Expr *Op); 5931 ExprResult checkPseudoObjectAssignment(Scope *S, SourceLocation OpLoc, 5932 BinaryOperatorKind Opcode, 5933 Expr *LHS, Expr *RHS); 5934 ExprResult checkPseudoObjectRValue(Expr *E); 5935 Expr *recreateSyntacticForm(PseudoObjectExpr *E); 5936 5937 QualType CheckConditionalOperands( // C99 6.5.15 5938 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS, 5939 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc); 5940 QualType CXXCheckConditionalOperands( // C++ 5.16 5941 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5942 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5943 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 5944 bool *NonStandardCompositeType = 0); 5945 QualType FindCompositePointerType(SourceLocation Loc, 5946 ExprResult &E1, ExprResult &E2, 5947 bool *NonStandardCompositeType = 0) { 5948 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 5949 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, 5950 NonStandardCompositeType); 5951 E1 = Owned(E1Tmp); 5952 E2 = Owned(E2Tmp); 5953 return Composite; 5954 } 5955 5956 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5957 SourceLocation QuestionLoc); 5958 5959 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr, 5960 SourceLocation QuestionLoc); 5961 5962 /// type checking for vector binary operators. 5963 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS, 5964 SourceLocation Loc, bool IsCompAssign); 5965 QualType GetSignedVectorType(QualType V); 5966 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS, 5967 SourceLocation Loc, bool isRelational); 5968 QualType CheckVectorLogicalOperands(ExprResult &LHS, ExprResult &RHS, 5969 SourceLocation Loc); 5970 5971 /// type checking declaration initializers (C99 6.7.8) 5972 bool CheckForConstantInitializer(Expr *e, QualType t); 5973 5974 // type checking C++ declaration initializers (C++ [dcl.init]). 5975 5976 /// ReferenceCompareResult - Expresses the result of comparing two 5977 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5978 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5979 enum ReferenceCompareResult { 5980 /// Ref_Incompatible - The two types are incompatible, so direct 5981 /// reference binding is not possible. 5982 Ref_Incompatible = 0, 5983 /// Ref_Related - The two types are reference-related, which means 5984 /// that their unqualified forms (T1 and T2) are either the same 5985 /// or T1 is a base class of T2. 5986 Ref_Related, 5987 /// Ref_Compatible_With_Added_Qualification - The two types are 5988 /// reference-compatible with added qualification, meaning that 5989 /// they are reference-compatible and the qualifiers on T1 (cv1) 5990 /// are greater than the qualifiers on T2 (cv2). 5991 Ref_Compatible_With_Added_Qualification, 5992 /// Ref_Compatible - The two types are reference-compatible and 5993 /// have equivalent qualifiers (cv1 == cv2). 5994 Ref_Compatible 5995 }; 5996 5997 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 5998 QualType T1, QualType T2, 5999 bool &DerivedToBase, 6000 bool &ObjCConversion, 6001 bool &ObjCLifetimeConversion); 6002 6003 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType, 6004 Expr *CastExpr, CastKind &CastKind, 6005 ExprValueKind &VK, CXXCastPath &Path); 6006 6007 /// \brief Force an expression with unknown-type to an expression of the 6008 /// given type. 6009 ExprResult forceUnknownAnyToType(Expr *E, QualType ToType); 6010 6011 // CheckVectorCast - check type constraints for vectors. 6012 // Since vectors are an extension, there are no C standard reference for this. 6013 // We allow casting between vectors and integer datatypes of the same size. 6014 // returns true if the cast is invalid 6015 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 6016 CastKind &Kind); 6017 6018 // CheckExtVectorCast - check type constraints for extended vectors. 6019 // Since vectors are an extension, there are no C standard reference for this. 6020 // We allow casting between vectors and integer datatypes of the same size, 6021 // or vectors and the element type of that vector. 6022 // returns the cast expr 6023 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr, 6024 CastKind &Kind); 6025 6026 ExprResult BuildCXXFunctionalCastExpr(TypeSourceInfo *TInfo, 6027 SourceLocation LParenLoc, 6028 Expr *CastExpr, 6029 SourceLocation RParenLoc); 6030 6031 enum ARCConversionResult { ACR_okay, ACR_unbridged }; 6032 6033 /// \brief Checks for invalid conversions and casts between 6034 /// retainable pointers and other pointer kinds. 6035 ARCConversionResult CheckObjCARCConversion(SourceRange castRange, 6036 QualType castType, Expr *&op, 6037 CheckedConversionKind CCK); 6038 6039 Expr *stripARCUnbridgedCast(Expr *e); 6040 void diagnoseARCUnbridgedCast(Expr *e); 6041 6042 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 6043 QualType ExprType); 6044 6045 /// checkRetainCycles - Check whether an Objective-C message send 6046 /// might create an obvious retain cycle. 6047 void checkRetainCycles(ObjCMessageExpr *msg); 6048 void checkRetainCycles(Expr *receiver, Expr *argument); 6049 6050 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 6051 /// to weak/__unsafe_unretained type. 6052 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 6053 6054 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 6055 /// to weak/__unsafe_unretained expression. 6056 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 6057 6058 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 6059 /// \param Method - May be null. 6060 /// \param [out] ReturnType - The return type of the send. 6061 /// \return true iff there were any incompatible types. 6062 bool CheckMessageArgumentTypes(QualType ReceiverType, 6063 Expr **Args, unsigned NumArgs, Selector Sel, 6064 ObjCMethodDecl *Method, bool isClassMessage, 6065 bool isSuperMessage, 6066 SourceLocation lbrac, SourceLocation rbrac, 6067 QualType &ReturnType, ExprValueKind &VK); 6068 6069 /// \brief Determine the result of a message send expression based on 6070 /// the type of the receiver, the method expected to receive the message, 6071 /// and the form of the message send. 6072 QualType getMessageSendResultType(QualType ReceiverType, 6073 ObjCMethodDecl *Method, 6074 bool isClassMessage, bool isSuperMessage); 6075 6076 /// \brief If the given expression involves a message send to a method 6077 /// with a related result type, emit a note describing what happened. 6078 void EmitRelatedResultTypeNote(const Expr *E); 6079 6080 /// CheckBooleanCondition - Diagnose problems involving the use of 6081 /// the given expression as a boolean condition (e.g. in an if 6082 /// statement). Also performs the standard function and array 6083 /// decays, possibly changing the input variable. 6084 /// 6085 /// \param Loc - A location associated with the condition, e.g. the 6086 /// 'if' keyword. 6087 /// \return true iff there were any errors 6088 ExprResult CheckBooleanCondition(Expr *E, SourceLocation Loc); 6089 6090 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 6091 Expr *SubExpr); 6092 6093 /// DiagnoseAssignmentAsCondition - Given that an expression is 6094 /// being used as a boolean condition, warn if it's an assignment. 6095 void DiagnoseAssignmentAsCondition(Expr *E); 6096 6097 /// \brief Redundant parentheses over an equality comparison can indicate 6098 /// that the user intended an assignment used as condition. 6099 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE); 6100 6101 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 6102 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 6103 6104 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 6105 /// the specified width and sign. If an overflow occurs, detect it and emit 6106 /// the specified diagnostic. 6107 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 6108 unsigned NewWidth, bool NewSign, 6109 SourceLocation Loc, unsigned DiagID); 6110 6111 /// Checks that the Objective-C declaration is declared in the global scope. 6112 /// Emits an error and marks the declaration as invalid if it's not declared 6113 /// in the global scope. 6114 bool CheckObjCDeclScope(Decl *D); 6115 6116 /// VerifyIntegerConstantExpression - Verifies that an expression is an ICE, 6117 /// and reports the appropriate diagnostics. Returns false on success. 6118 /// Can optionally return the value of the expression. 6119 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, 6120 PartialDiagnostic Diag, 6121 bool AllowFold, 6122 PartialDiagnostic FoldDiag); 6123 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, 6124 PartialDiagnostic Diag, 6125 bool AllowFold = true) { 6126 return VerifyIntegerConstantExpression(E, Result, Diag, AllowFold, 6127 PDiag(0)); 6128 } 6129 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result = 0); 6130 6131 /// VerifyBitField - verifies that a bit field expression is an ICE and has 6132 /// the correct width, and that the field type is valid. 6133 /// Returns false on success. 6134 /// Can optionally return whether the bit-field is of width 0 6135 ExprResult VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 6136 QualType FieldTy, Expr *BitWidth, 6137 bool *ZeroWidth = 0); 6138 6139 enum CUDAFunctionTarget { 6140 CFT_Device, 6141 CFT_Global, 6142 CFT_Host, 6143 CFT_HostDevice 6144 }; 6145 6146 CUDAFunctionTarget IdentifyCUDATarget(const FunctionDecl *D); 6147 6148 bool CheckCUDATarget(CUDAFunctionTarget CallerTarget, 6149 CUDAFunctionTarget CalleeTarget); 6150 6151 bool CheckCUDATarget(const FunctionDecl *Caller, const FunctionDecl *Callee) { 6152 return CheckCUDATarget(IdentifyCUDATarget(Caller), 6153 IdentifyCUDATarget(Callee)); 6154 } 6155 6156 /// \name Code completion 6157 //@{ 6158 /// \brief Describes the context in which code completion occurs. 6159 enum ParserCompletionContext { 6160 /// \brief Code completion occurs at top-level or namespace context. 6161 PCC_Namespace, 6162 /// \brief Code completion occurs within a class, struct, or union. 6163 PCC_Class, 6164 /// \brief Code completion occurs within an Objective-C interface, protocol, 6165 /// or category. 6166 PCC_ObjCInterface, 6167 /// \brief Code completion occurs within an Objective-C implementation or 6168 /// category implementation 6169 PCC_ObjCImplementation, 6170 /// \brief Code completion occurs within the list of instance variables 6171 /// in an Objective-C interface, protocol, category, or implementation. 6172 PCC_ObjCInstanceVariableList, 6173 /// \brief Code completion occurs following one or more template 6174 /// headers. 6175 PCC_Template, 6176 /// \brief Code completion occurs following one or more template 6177 /// headers within a class. 6178 PCC_MemberTemplate, 6179 /// \brief Code completion occurs within an expression. 6180 PCC_Expression, 6181 /// \brief Code completion occurs within a statement, which may 6182 /// also be an expression or a declaration. 6183 PCC_Statement, 6184 /// \brief Code completion occurs at the beginning of the 6185 /// initialization statement (or expression) in a for loop. 6186 PCC_ForInit, 6187 /// \brief Code completion occurs within the condition of an if, 6188 /// while, switch, or for statement. 6189 PCC_Condition, 6190 /// \brief Code completion occurs within the body of a function on a 6191 /// recovery path, where we do not have a specific handle on our position 6192 /// in the grammar. 6193 PCC_RecoveryInFunction, 6194 /// \brief Code completion occurs where only a type is permitted. 6195 PCC_Type, 6196 /// \brief Code completion occurs in a parenthesized expression, which 6197 /// might also be a type cast. 6198 PCC_ParenthesizedExpression, 6199 /// \brief Code completion occurs within a sequence of declaration 6200 /// specifiers within a function, method, or block. 6201 PCC_LocalDeclarationSpecifiers 6202 }; 6203 6204 void CodeCompleteModuleImport(SourceLocation ImportLoc, ModuleIdPath Path); 6205 void CodeCompleteOrdinaryName(Scope *S, 6206 ParserCompletionContext CompletionContext); 6207 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 6208 bool AllowNonIdentifiers, 6209 bool AllowNestedNameSpecifiers); 6210 6211 struct CodeCompleteExpressionData; 6212 void CodeCompleteExpression(Scope *S, 6213 const CodeCompleteExpressionData &Data); 6214 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 6215 SourceLocation OpLoc, 6216 bool IsArrow); 6217 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 6218 void CodeCompleteTag(Scope *S, unsigned TagSpec); 6219 void CodeCompleteTypeQualifiers(DeclSpec &DS); 6220 void CodeCompleteCase(Scope *S); 6221 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 6222 void CodeCompleteInitializer(Scope *S, Decl *D); 6223 void CodeCompleteReturn(Scope *S); 6224 void CodeCompleteAfterIf(Scope *S); 6225 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 6226 6227 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 6228 bool EnteringContext); 6229 void CodeCompleteUsing(Scope *S); 6230 void CodeCompleteUsingDirective(Scope *S); 6231 void CodeCompleteNamespaceDecl(Scope *S); 6232 void CodeCompleteNamespaceAliasDecl(Scope *S); 6233 void CodeCompleteOperatorName(Scope *S); 6234 void CodeCompleteConstructorInitializer(Decl *Constructor, 6235 CXXCtorInitializer** Initializers, 6236 unsigned NumInitializers); 6237 6238 void CodeCompleteObjCAtDirective(Scope *S); 6239 void CodeCompleteObjCAtVisibility(Scope *S); 6240 void CodeCompleteObjCAtStatement(Scope *S); 6241 void CodeCompleteObjCAtExpression(Scope *S); 6242 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 6243 void CodeCompleteObjCPropertyGetter(Scope *S); 6244 void CodeCompleteObjCPropertySetter(Scope *S); 6245 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 6246 bool IsParameter); 6247 void CodeCompleteObjCMessageReceiver(Scope *S); 6248 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 6249 IdentifierInfo **SelIdents, 6250 unsigned NumSelIdents, 6251 bool AtArgumentExpression); 6252 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 6253 IdentifierInfo **SelIdents, 6254 unsigned NumSelIdents, 6255 bool AtArgumentExpression, 6256 bool IsSuper = false); 6257 void CodeCompleteObjCInstanceMessage(Scope *S, Expr *Receiver, 6258 IdentifierInfo **SelIdents, 6259 unsigned NumSelIdents, 6260 bool AtArgumentExpression, 6261 ObjCInterfaceDecl *Super = 0); 6262 void CodeCompleteObjCForCollection(Scope *S, 6263 DeclGroupPtrTy IterationVar); 6264 void CodeCompleteObjCSelector(Scope *S, 6265 IdentifierInfo **SelIdents, 6266 unsigned NumSelIdents); 6267 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 6268 unsigned NumProtocols); 6269 void CodeCompleteObjCProtocolDecl(Scope *S); 6270 void CodeCompleteObjCInterfaceDecl(Scope *S); 6271 void CodeCompleteObjCSuperclass(Scope *S, 6272 IdentifierInfo *ClassName, 6273 SourceLocation ClassNameLoc); 6274 void CodeCompleteObjCImplementationDecl(Scope *S); 6275 void CodeCompleteObjCInterfaceCategory(Scope *S, 6276 IdentifierInfo *ClassName, 6277 SourceLocation ClassNameLoc); 6278 void CodeCompleteObjCImplementationCategory(Scope *S, 6279 IdentifierInfo *ClassName, 6280 SourceLocation ClassNameLoc); 6281 void CodeCompleteObjCPropertyDefinition(Scope *S); 6282 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 6283 IdentifierInfo *PropertyName); 6284 void CodeCompleteObjCMethodDecl(Scope *S, 6285 bool IsInstanceMethod, 6286 ParsedType ReturnType); 6287 void CodeCompleteObjCMethodDeclSelector(Scope *S, 6288 bool IsInstanceMethod, 6289 bool AtParameterName, 6290 ParsedType ReturnType, 6291 IdentifierInfo **SelIdents, 6292 unsigned NumSelIdents); 6293 void CodeCompletePreprocessorDirective(bool InConditional); 6294 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 6295 void CodeCompletePreprocessorMacroName(bool IsDefinition); 6296 void CodeCompletePreprocessorExpression(); 6297 void CodeCompletePreprocessorMacroArgument(Scope *S, 6298 IdentifierInfo *Macro, 6299 MacroInfo *MacroInfo, 6300 unsigned Argument); 6301 void CodeCompleteNaturalLanguage(); 6302 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 6303 SmallVectorImpl<CodeCompletionResult> &Results); 6304 //@} 6305 6306 //===--------------------------------------------------------------------===// 6307 // Extra semantic analysis beyond the C type system 6308 6309public: 6310 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 6311 unsigned ByteNo) const; 6312 6313private: 6314 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr, 6315 const ArraySubscriptExpr *ASE=0, 6316 bool AllowOnePastEnd=true, bool IndexNegated=false); 6317 void CheckArrayAccess(const Expr *E); 6318 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 6319 bool CheckObjCMethodCall(ObjCMethodDecl *Method, SourceLocation loc, 6320 Expr **Args, unsigned NumArgs); 6321 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 6322 6323 bool CheckObjCString(Expr *Arg); 6324 6325 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6326 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6327 6328 bool SemaBuiltinVAStart(CallExpr *TheCall); 6329 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 6330 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 6331 6332public: 6333 // Used by C++ template instantiation. 6334 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 6335 6336private: 6337 bool SemaBuiltinPrefetch(CallExpr *TheCall); 6338 bool SemaBuiltinObjectSize(CallExpr *TheCall); 6339 bool SemaBuiltinLongjmp(CallExpr *TheCall); 6340 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 6341 ExprResult SemaAtomicOpsOverloaded(ExprResult TheCallResult, 6342 AtomicExpr::AtomicOp Op); 6343 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 6344 llvm::APSInt &Result); 6345 6346 enum FormatStringType { 6347 FST_Scanf, 6348 FST_Printf, 6349 FST_NSString, 6350 FST_Strftime, 6351 FST_Strfmon, 6352 FST_Kprintf, 6353 FST_Unknown 6354 }; 6355 static FormatStringType GetFormatStringType(const FormatAttr *Format); 6356 bool SemaCheckStringLiteral(const Expr *E, Expr **Args, unsigned NumArgs, 6357 bool HasVAListArg, unsigned format_idx, 6358 unsigned firstDataArg, FormatStringType Type, 6359 bool inFunctionCall = true); 6360 6361 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 6362 Expr **Args, unsigned NumArgs, bool HasVAListArg, 6363 unsigned format_idx, unsigned firstDataArg, 6364 FormatStringType Type, bool inFunctionCall); 6365 6366 void CheckFormatArguments(const FormatAttr *Format, CallExpr *TheCall); 6367 void CheckFormatArguments(const FormatAttr *Format, Expr **Args, 6368 unsigned NumArgs, bool IsCXXMember, 6369 SourceLocation Loc, SourceRange Range); 6370 void CheckFormatArguments(Expr **Args, unsigned NumArgs, 6371 bool HasVAListArg, unsigned format_idx, 6372 unsigned firstDataArg, FormatStringType Type, 6373 SourceLocation Loc, SourceRange range); 6374 6375 void CheckNonNullArguments(const NonNullAttr *NonNull, 6376 const Expr * const *ExprArgs, 6377 SourceLocation CallSiteLoc); 6378 6379 void CheckMemaccessArguments(const CallExpr *Call, 6380 unsigned BId, 6381 IdentifierInfo *FnName); 6382 6383 void CheckStrlcpycatArguments(const CallExpr *Call, 6384 IdentifierInfo *FnName); 6385 6386 void CheckStrncatArguments(const CallExpr *Call, 6387 IdentifierInfo *FnName); 6388 6389 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 6390 SourceLocation ReturnLoc); 6391 void CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr* RHS); 6392 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 6393 6394 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 6395 Expr *Init); 6396 6397 /// \brief The parser's current scope. 6398 /// 6399 /// The parser maintains this state here. 6400 Scope *CurScope; 6401 6402protected: 6403 friend class Parser; 6404 friend class InitializationSequence; 6405 friend class ASTReader; 6406 friend class ASTWriter; 6407 6408public: 6409 /// \brief Retrieve the parser's current scope. 6410 /// 6411 /// This routine must only be used when it is certain that semantic analysis 6412 /// and the parser are in precisely the same context, which is not the case 6413 /// when, e.g., we are performing any kind of template instantiation. 6414 /// Therefore, the only safe places to use this scope are in the parser 6415 /// itself and in routines directly invoked from the parser and *never* from 6416 /// template substitution or instantiation. 6417 Scope *getCurScope() const { return CurScope; } 6418 6419 Decl *getObjCDeclContext() const; 6420 6421 DeclContext *getCurLexicalContext() const { 6422 return OriginalLexicalContext ? OriginalLexicalContext : CurContext; 6423 } 6424 6425 AvailabilityResult getCurContextAvailability() const; 6426}; 6427 6428/// \brief RAII object that enters a new expression evaluation context. 6429class EnterExpressionEvaluationContext { 6430 Sema &Actions; 6431 6432public: 6433 EnterExpressionEvaluationContext(Sema &Actions, 6434 Sema::ExpressionEvaluationContext NewContext) 6435 : Actions(Actions) { 6436 Actions.PushExpressionEvaluationContext(NewContext); 6437 } 6438 6439 ~EnterExpressionEvaluationContext() { 6440 Actions.PopExpressionEvaluationContext(); 6441 } 6442}; 6443 6444} // end namespace clang 6445 6446#endif 6447