Sema.h revision d6cf912e1e33167452f328d15b98a790c58c03c0
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 LambdaExpr; 106 class LangOptions; 107 class LocalInstantiationScope; 108 class LookupResult; 109 class MacroInfo; 110 class MultiLevelTemplateArgumentList; 111 class NamedDecl; 112 class NonNullAttr; 113 class ObjCCategoryDecl; 114 class ObjCCategoryImplDecl; 115 class ObjCCompatibleAliasDecl; 116 class ObjCContainerDecl; 117 class ObjCImplDecl; 118 class ObjCImplementationDecl; 119 class ObjCInterfaceDecl; 120 class ObjCIvarDecl; 121 template <class T> class ObjCList; 122 class ObjCMessageExpr; 123 class ObjCMethodDecl; 124 class ObjCPropertyDecl; 125 class ObjCProtocolDecl; 126 class OverloadCandidateSet; 127 class OverloadExpr; 128 class ParenListExpr; 129 class ParmVarDecl; 130 class Preprocessor; 131 class PseudoDestructorTypeStorage; 132 class PseudoObjectExpr; 133 class QualType; 134 class StandardConversionSequence; 135 class Stmt; 136 class StringLiteral; 137 class SwitchStmt; 138 class TargetAttributesSema; 139 class TemplateArgument; 140 class TemplateArgumentList; 141 class TemplateArgumentLoc; 142 class TemplateDecl; 143 class TemplateParameterList; 144 class TemplatePartialOrderingContext; 145 class TemplateTemplateParmDecl; 146 class Token; 147 class TypeAliasDecl; 148 class TypedefDecl; 149 class TypedefNameDecl; 150 class TypeLoc; 151 class UnqualifiedId; 152 class UnresolvedLookupExpr; 153 class UnresolvedMemberExpr; 154 class UnresolvedSetImpl; 155 class UnresolvedSetIterator; 156 class UsingDecl; 157 class UsingShadowDecl; 158 class ValueDecl; 159 class VarDecl; 160 class VisibilityAttr; 161 class VisibleDeclConsumer; 162 class IndirectFieldDecl; 163 164namespace sema { 165 class AccessedEntity; 166 class BlockScopeInfo; 167 class DelayedDiagnostic; 168 class FunctionScopeInfo; 169 class LambdaScopeInfo; 170 class PossiblyUnreachableDiag; 171 class TemplateDeductionInfo; 172} 173 174// FIXME: No way to easily map from TemplateTypeParmTypes to 175// TemplateTypeParmDecls, so we have this horrible PointerUnion. 176typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 177 SourceLocation> UnexpandedParameterPack; 178 179/// Sema - This implements semantic analysis and AST building for C. 180class Sema { 181 Sema(const Sema&); // DO NOT IMPLEMENT 182 void operator=(const Sema&); // DO NOT IMPLEMENT 183 mutable const TargetAttributesSema* TheTargetAttributesSema; 184public: 185 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 186 typedef OpaquePtr<TemplateName> TemplateTy; 187 typedef OpaquePtr<QualType> TypeTy; 188 189 OpenCLOptions OpenCLFeatures; 190 FPOptions FPFeatures; 191 192 const LangOptions &LangOpts; 193 Preprocessor &PP; 194 ASTContext &Context; 195 ASTConsumer &Consumer; 196 DiagnosticsEngine &Diags; 197 SourceManager &SourceMgr; 198 199 /// \brief Flag indicating whether or not to collect detailed statistics. 200 bool CollectStats; 201 202 /// \brief Source of additional semantic information. 203 ExternalSemaSource *ExternalSource; 204 205 /// \brief Code-completion consumer. 206 CodeCompleteConsumer *CodeCompleter; 207 208 /// CurContext - This is the current declaration context of parsing. 209 DeclContext *CurContext; 210 211 /// \brief Generally null except when we temporarily switch decl contexts, 212 /// like in \see ActOnObjCTemporaryExitContainerContext. 213 DeclContext *OriginalLexicalContext; 214 215 /// VAListTagName - The declaration name corresponding to __va_list_tag. 216 /// This is used as part of a hack to omit that class from ADL results. 217 DeclarationName VAListTagName; 218 219 /// PackContext - Manages the stack for #pragma pack. An alignment 220 /// of 0 indicates default alignment. 221 void *PackContext; // Really a "PragmaPackStack*" 222 223 bool MSStructPragmaOn; // True when #pragma ms_struct on 224 225 /// VisContext - Manages the stack for #pragma GCC visibility. 226 void *VisContext; // Really a "PragmaVisStack*" 227 228 /// ExprNeedsCleanups - True if the current evaluation context 229 /// requires cleanups to be run at its conclusion. 230 bool ExprNeedsCleanups; 231 232 /// ExprCleanupObjects - This is the stack of objects requiring 233 /// cleanup that are created by the current full expression. The 234 /// element type here is ExprWithCleanups::Object. 235 SmallVector<BlockDecl*, 8> ExprCleanupObjects; 236 237 llvm::SmallPtrSet<Expr*, 8> MaybeODRUseExprs; 238 239 /// \brief Stack containing information about each of the nested 240 /// function, block, and method scopes that are currently active. 241 /// 242 /// This array is never empty. Clients should ignore the first 243 /// element, which is used to cache a single FunctionScopeInfo 244 /// that's used to parse every top-level function. 245 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 246 247 typedef LazyVector<TypedefNameDecl *, ExternalSemaSource, 248 &ExternalSemaSource::ReadExtVectorDecls, 2, 2> 249 ExtVectorDeclsType; 250 251 /// ExtVectorDecls - This is a list all the extended vector types. This allows 252 /// us to associate a raw vector type with one of the ext_vector type names. 253 /// This is only necessary for issuing pretty diagnostics. 254 ExtVectorDeclsType ExtVectorDecls; 255 256 /// \brief The set of types for which we have already complained about the 257 /// definitions being hidden. 258 /// 259 /// This set is used to suppress redundant diagnostics. 260 llvm::SmallPtrSet<NamedDecl *, 4> HiddenDefinitions; 261 262 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 263 OwningPtr<CXXFieldCollector> FieldCollector; 264 265 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 266 267 /// PureVirtualClassDiagSet - a set of class declarations which we have 268 /// emitted a list of pure virtual functions. Used to prevent emitting the 269 /// same list more than once. 270 OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 271 272 /// ParsingInitForAutoVars - a set of declarations with auto types for which 273 /// we are currently parsing the initializer. 274 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 275 276 /// \brief A mapping from external names to the most recent 277 /// locally-scoped external declaration with that name. 278 /// 279 /// This map contains external declarations introduced in local 280 /// scoped, e.g., 281 /// 282 /// \code 283 /// void f() { 284 /// void foo(int, int); 285 /// } 286 /// \endcode 287 /// 288 /// Here, the name "foo" will be associated with the declaration on 289 /// "foo" within f. This name is not visible outside of 290 /// "f". However, we still find it in two cases: 291 /// 292 /// - If we are declaring another external with the name "foo", we 293 /// can find "foo" as a previous declaration, so that the types 294 /// of this external declaration can be checked for 295 /// compatibility. 296 /// 297 /// - If we would implicitly declare "foo" (e.g., due to a call to 298 /// "foo" in C when no prototype or definition is visible), then 299 /// we find this declaration of "foo" and complain that it is 300 /// not visible. 301 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 302 303 /// \brief Look for a locally scoped external declaration by the given name. 304 llvm::DenseMap<DeclarationName, NamedDecl *>::iterator 305 findLocallyScopedExternalDecl(DeclarationName Name); 306 307 typedef LazyVector<VarDecl *, ExternalSemaSource, 308 &ExternalSemaSource::ReadTentativeDefinitions, 2, 2> 309 TentativeDefinitionsType; 310 311 /// \brief All the tentative definitions encountered in the TU. 312 TentativeDefinitionsType TentativeDefinitions; 313 314 typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource, 315 &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2> 316 UnusedFileScopedDeclsType; 317 318 /// \brief The set of file scoped decls seen so far that have not been used 319 /// and must warn if not used. Only contains the first declaration. 320 UnusedFileScopedDeclsType UnusedFileScopedDecls; 321 322 typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource, 323 &ExternalSemaSource::ReadDelegatingConstructors, 2, 2> 324 DelegatingCtorDeclsType; 325 326 /// \brief All the delegating constructors seen so far in the file, used for 327 /// cycle detection at the end of the TU. 328 DelegatingCtorDeclsType DelegatingCtorDecls; 329 330 /// \brief All the overriding destructors seen during a class definition 331 /// (there could be multiple due to nested classes) that had their exception 332 /// spec checks delayed, plus the overridden destructor. 333 SmallVector<std::pair<const CXXDestructorDecl*, 334 const CXXDestructorDecl*>, 2> 335 DelayedDestructorExceptionSpecChecks; 336 337 /// \brief Callback to the parser to parse templated functions when needed. 338 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 339 LateTemplateParserCB *LateTemplateParser; 340 void *OpaqueParser; 341 342 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 343 LateTemplateParser = LTP; 344 OpaqueParser = P; 345 } 346 347 class DelayedDiagnostics; 348 349 class ParsingDeclState { 350 unsigned SavedStackSize; 351 friend class Sema::DelayedDiagnostics; 352 }; 353 354 class ProcessingContextState { 355 unsigned SavedParsingDepth; 356 unsigned SavedActiveStackBase; 357 friend class Sema::DelayedDiagnostics; 358 }; 359 360 /// A class which encapsulates the logic for delaying diagnostics 361 /// during parsing and other processing. 362 class DelayedDiagnostics { 363 /// \brief The stack of diagnostics that were delayed due to being 364 /// produced during the parsing of a declaration. 365 sema::DelayedDiagnostic *Stack; 366 367 /// \brief The number of objects on the delayed-diagnostics stack. 368 unsigned StackSize; 369 370 /// \brief The current capacity of the delayed-diagnostics stack. 371 unsigned StackCapacity; 372 373 /// \brief The index of the first "active" delayed diagnostic in 374 /// the stack. When parsing class definitions, we ignore active 375 /// delayed diagnostics from the surrounding context. 376 unsigned ActiveStackBase; 377 378 /// \brief The depth of the declarations we're currently parsing. 379 /// This gets saved and reset whenever we enter a class definition. 380 unsigned ParsingDepth; 381 382 public: 383 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 384 ActiveStackBase(0), ParsingDepth(0) {} 385 386 ~DelayedDiagnostics() { 387 delete[] reinterpret_cast<char*>(Stack); 388 } 389 390 /// Adds a delayed diagnostic. 391 void add(const sema::DelayedDiagnostic &diag); 392 393 /// Determines whether diagnostics should be delayed. 394 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 395 396 /// Observe that we've started parsing a declaration. Access and 397 /// deprecation diagnostics will be delayed; when the declaration 398 /// is completed, all active delayed diagnostics will be evaluated 399 /// in its context, and then active diagnostics stack will be 400 /// popped down to the saved depth. 401 ParsingDeclState pushParsingDecl() { 402 ParsingDepth++; 403 404 ParsingDeclState state; 405 state.SavedStackSize = StackSize; 406 return state; 407 } 408 409 /// Observe that we're completed parsing a declaration. 410 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 411 412 /// Observe that we've started processing a different context, the 413 /// contents of which are semantically separate from the 414 /// declarations it may lexically appear in. This sets aside the 415 /// current stack of active diagnostics and starts afresh. 416 ProcessingContextState pushContext() { 417 assert(StackSize >= ActiveStackBase); 418 419 ProcessingContextState state; 420 state.SavedParsingDepth = ParsingDepth; 421 state.SavedActiveStackBase = ActiveStackBase; 422 423 ActiveStackBase = StackSize; 424 ParsingDepth = 0; 425 426 return state; 427 } 428 429 /// Observe that we've stopped processing a context. This 430 /// restores the previous stack of active diagnostics. 431 void popContext(ProcessingContextState state) { 432 assert(ActiveStackBase == StackSize); 433 assert(ParsingDepth == 0); 434 ActiveStackBase = state.SavedActiveStackBase; 435 ParsingDepth = state.SavedParsingDepth; 436 } 437 } DelayedDiagnostics; 438 439 /// A RAII object to temporarily push a declaration context. 440 class ContextRAII { 441 private: 442 Sema &S; 443 DeclContext *SavedContext; 444 ProcessingContextState SavedContextState; 445 446 public: 447 ContextRAII(Sema &S, DeclContext *ContextToPush) 448 : S(S), SavedContext(S.CurContext), 449 SavedContextState(S.DelayedDiagnostics.pushContext()) 450 { 451 assert(ContextToPush && "pushing null context"); 452 S.CurContext = ContextToPush; 453 } 454 455 void pop() { 456 if (!SavedContext) return; 457 S.CurContext = SavedContext; 458 S.DelayedDiagnostics.popContext(SavedContextState); 459 SavedContext = 0; 460 } 461 462 ~ContextRAII() { 463 pop(); 464 } 465 }; 466 467 /// WeakUndeclaredIdentifiers - Identifiers contained in 468 /// #pragma weak before declared. rare. may alias another 469 /// identifier, declared or undeclared 470 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 471 472 /// \brief Load weak undeclared identifiers from the external source. 473 void LoadExternalWeakUndeclaredIdentifiers(); 474 475 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 476 /// #pragma weak during processing of other Decls. 477 /// I couldn't figure out a clean way to generate these in-line, so 478 /// we store them here and handle separately -- which is a hack. 479 /// It would be best to refactor this. 480 SmallVector<Decl*,2> WeakTopLevelDecl; 481 482 IdentifierResolver IdResolver; 483 484 /// Translation Unit Scope - useful to Objective-C actions that need 485 /// to lookup file scope declarations in the "ordinary" C decl namespace. 486 /// For example, user-defined classes, built-in "id" type, etc. 487 Scope *TUScope; 488 489 /// \brief The C++ "std" namespace, where the standard library resides. 490 LazyDeclPtr StdNamespace; 491 492 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 493 /// standard library. 494 LazyDeclPtr StdBadAlloc; 495 496 /// \brief The C++ "std::initializer_list" template, which is defined in 497 /// <initializer_list>. 498 ClassTemplateDecl *StdInitializerList; 499 500 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 501 RecordDecl *CXXTypeInfoDecl; 502 503 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 504 RecordDecl *MSVCGuidDecl; 505 506 /// A flag to remember whether the implicit forms of operator new and delete 507 /// have been declared. 508 bool GlobalNewDeleteDeclared; 509 510 511 /// A flag that is set when parsing a -dealloc method and no [super dealloc] 512 /// call was found yet. 513 bool ObjCShouldCallSuperDealloc; 514 /// A flag that is set when parsing a -finalize method and no [super finalize] 515 /// call was found yet. 516 bool ObjCShouldCallSuperFinalize; 517 518 /// \brief Describes how the expressions currently being parsed are 519 /// evaluated at run-time, if at all. 520 enum ExpressionEvaluationContext { 521 /// \brief The current expression and its subexpressions occur within an 522 /// unevaluated operand (C++11 [expr]p7), such as the subexpression of 523 /// \c sizeof, where the type of the expression may be significant but 524 /// no code will be generated to evaluate the value of the expression at 525 /// run time. 526 Unevaluated, 527 528 /// \brief The current context is "potentially evaluated" in C++11 terms, 529 /// but the expression is evaluated at compile-time (like the values of 530 /// cases in a switch statment). 531 ConstantEvaluated, 532 533 /// \brief The current expression is potentially evaluated at run time, 534 /// which means that code may be generated to evaluate the value of the 535 /// expression at run time. 536 PotentiallyEvaluated, 537 538 /// \brief The current expression is potentially evaluated, but any 539 /// declarations referenced inside that expression are only used if 540 /// in fact the current expression is used. 541 /// 542 /// This value is used when parsing default function arguments, for which 543 /// we would like to provide diagnostics (e.g., passing non-POD arguments 544 /// through varargs) but do not want to mark declarations as "referenced" 545 /// until the default argument is used. 546 PotentiallyEvaluatedIfUsed 547 }; 548 549 /// \brief Data structure used to record current or nested 550 /// expression evaluation contexts. 551 struct ExpressionEvaluationContextRecord { 552 /// \brief The expression evaluation context. 553 ExpressionEvaluationContext Context; 554 555 /// \brief Whether the enclosing context needed a cleanup. 556 bool ParentNeedsCleanups; 557 558 /// \brief The number of active cleanup objects when we entered 559 /// this expression evaluation context. 560 unsigned NumCleanupObjects; 561 562 llvm::SmallPtrSet<Expr*, 8> SavedMaybeODRUseExprs; 563 564 /// \brief The lambdas that are present within this context, if it 565 /// is indeed an unevaluated context. 566 llvm::SmallVector<LambdaExpr *, 2> Lambdas; 567 568 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 569 unsigned NumCleanupObjects, 570 bool ParentNeedsCleanups) 571 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups), 572 NumCleanupObjects(NumCleanupObjects) { } 573 }; 574 575 /// A stack of expression evaluation contexts. 576 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 577 578 /// SpecialMemberOverloadResult - The overloading result for a special member 579 /// function. 580 /// 581 /// This is basically a wrapper around PointerIntPair. The lowest bit of the 582 /// integer is used to determine whether we have a parameter qualification 583 /// match, the second-lowest is whether we had success in resolving the 584 /// overload to a unique non-deleted function. 585 /// 586 /// The ConstParamMatch bit represents whether, when looking up a copy 587 /// constructor or assignment operator, we found a potential copy 588 /// constructor/assignment operator whose first parameter is const-qualified. 589 /// This is used for determining parameter types of other objects and is 590 /// utterly meaningless on other types of special members. 591 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 592 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 593 public: 594 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 595 : FastFoldingSetNode(ID) 596 {} 597 598 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 599 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 600 601 bool hasSuccess() const { return Pair.getInt() & 0x1; } 602 void setSuccess(bool B) { 603 Pair.setInt(unsigned(B) | hasConstParamMatch() << 1); 604 } 605 606 bool hasConstParamMatch() const { return Pair.getInt() & 0x2; } 607 void setConstParamMatch(bool B) { 608 Pair.setInt(B << 1 | unsigned(hasSuccess())); 609 } 610 }; 611 612 /// \brief A cache of special member function overload resolution results 613 /// for C++ records. 614 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 615 616 /// \brief The kind of translation unit we are processing. 617 /// 618 /// When we're processing a complete translation unit, Sema will perform 619 /// end-of-translation-unit semantic tasks (such as creating 620 /// initializers for tentative definitions in C) once parsing has 621 /// completed. Modules and precompiled headers perform different kinds of 622 /// checks. 623 TranslationUnitKind TUKind; 624 625 llvm::BumpPtrAllocator BumpAlloc; 626 627 /// \brief The number of SFINAE diagnostics that have been trapped. 628 unsigned NumSFINAEErrors; 629 630 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> > 631 UnparsedDefaultArgInstantiationsMap; 632 633 /// \brief A mapping from parameters with unparsed default arguments to the 634 /// set of instantiations of each parameter. 635 /// 636 /// This mapping is a temporary data structure used when parsing 637 /// nested class templates or nested classes of class templates, 638 /// where we might end up instantiating an inner class before the 639 /// default arguments of its methods have been parsed. 640 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 641 642 // Contains the locations of the beginning of unparsed default 643 // argument locations. 644 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 645 646 /// UndefinedInternals - all the used, undefined objects with 647 /// internal linkage in this translation unit. 648 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 649 650 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 651 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 652 653 /// Method Pool - allows efficient lookup when typechecking messages to "id". 654 /// We need to maintain a list, since selectors can have differing signatures 655 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 656 /// of selectors are "overloaded"). 657 GlobalMethodPool MethodPool; 658 659 /// Method selectors used in a @selector expression. Used for implementation 660 /// of -Wselector. 661 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 662 663 void ReadMethodPool(Selector Sel); 664 665 /// Private Helper predicate to check for 'self'. 666 bool isSelfExpr(Expr *RExpr); 667public: 668 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 669 TranslationUnitKind TUKind = TU_Complete, 670 CodeCompleteConsumer *CompletionConsumer = 0); 671 ~Sema(); 672 673 /// \brief Perform initialization that occurs after the parser has been 674 /// initialized but before it parses anything. 675 void Initialize(); 676 677 const LangOptions &getLangOptions() const { return LangOpts; } 678 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 679 FPOptions &getFPOptions() { return FPFeatures; } 680 681 DiagnosticsEngine &getDiagnostics() const { return Diags; } 682 SourceManager &getSourceManager() const { return SourceMgr; } 683 const TargetAttributesSema &getTargetAttributesSema() const; 684 Preprocessor &getPreprocessor() const { return PP; } 685 ASTContext &getASTContext() const { return Context; } 686 ASTConsumer &getASTConsumer() const { return Consumer; } 687 ASTMutationListener *getASTMutationListener() const; 688 689 void PrintStats() const; 690 691 /// \brief Helper class that creates diagnostics with optional 692 /// template instantiation stacks. 693 /// 694 /// This class provides a wrapper around the basic DiagnosticBuilder 695 /// class that emits diagnostics. SemaDiagnosticBuilder is 696 /// responsible for emitting the diagnostic (as DiagnosticBuilder 697 /// does) and, if the diagnostic comes from inside a template 698 /// instantiation, printing the template instantiation stack as 699 /// well. 700 class SemaDiagnosticBuilder : public DiagnosticBuilder { 701 Sema &SemaRef; 702 unsigned DiagID; 703 704 public: 705 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 706 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 707 708 explicit SemaDiagnosticBuilder(Sema &SemaRef) 709 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 710 711 ~SemaDiagnosticBuilder(); 712 }; 713 714 /// \brief Emit a diagnostic. 715 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 716 717 /// \brief Emit a partial diagnostic. 718 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 719 720 /// \brief Build a partial diagnostic. 721 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 722 723 bool findMacroSpelling(SourceLocation &loc, StringRef name); 724 725 /// \brief Get a string to suggest for zero-initialization of a type. 726 const char *getFixItZeroInitializerForType(QualType T) const; 727 728 ExprResult Owned(Expr* E) { return E; } 729 ExprResult Owned(ExprResult R) { return R; } 730 StmtResult Owned(Stmt* S) { return S; } 731 732 void ActOnEndOfTranslationUnit(); 733 734 void CheckDelegatingCtorCycles(); 735 736 Scope *getScopeForContext(DeclContext *Ctx); 737 738 void PushFunctionScope(); 739 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 740 void PushLambdaScope(CXXRecordDecl *Lambda, CXXMethodDecl *CallOperator); 741 void PopFunctionScopeInfo(const sema::AnalysisBasedWarnings::Policy *WP =0, 742 const Decl *D = 0, const BlockExpr *blkExpr = 0); 743 744 sema::FunctionScopeInfo *getCurFunction() const { 745 return FunctionScopes.back(); 746 } 747 748 bool hasAnyUnrecoverableErrorsInThisFunction() const; 749 750 /// \brief Retrieve the current block, if any. 751 sema::BlockScopeInfo *getCurBlock(); 752 753 /// \brief Retrieve the current lambda expression, if any. 754 sema::LambdaScopeInfo *getCurLambda(); 755 756 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 757 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 758 759 //===--------------------------------------------------------------------===// 760 // Type Analysis / Processing: SemaType.cpp. 761 // 762 763 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 764 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 765 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 766 } 767 QualType BuildPointerType(QualType T, 768 SourceLocation Loc, DeclarationName Entity); 769 QualType BuildReferenceType(QualType T, bool LValueRef, 770 SourceLocation Loc, DeclarationName Entity); 771 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 772 Expr *ArraySize, unsigned Quals, 773 SourceRange Brackets, DeclarationName Entity); 774 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 775 SourceLocation AttrLoc); 776 QualType BuildFunctionType(QualType T, 777 QualType *ParamTypes, unsigned NumParamTypes, 778 bool Variadic, unsigned Quals, 779 RefQualifierKind RefQualifier, 780 SourceLocation Loc, DeclarationName Entity, 781 FunctionType::ExtInfo Info); 782 QualType BuildMemberPointerType(QualType T, QualType Class, 783 SourceLocation Loc, 784 DeclarationName Entity); 785 QualType BuildBlockPointerType(QualType T, 786 SourceLocation Loc, DeclarationName Entity); 787 QualType BuildParenType(QualType T); 788 QualType BuildAtomicType(QualType T, SourceLocation Loc); 789 790 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); 791 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); 792 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 793 TypeSourceInfo *ReturnTypeInfo); 794 /// \brief Package the given type and TSI into a ParsedType. 795 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 796 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 797 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 798 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 799 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 800 bool CheckDistantExceptionSpec(QualType T); 801 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 802 bool CheckEquivalentExceptionSpec( 803 const FunctionProtoType *Old, SourceLocation OldLoc, 804 const FunctionProtoType *New, SourceLocation NewLoc); 805 bool CheckEquivalentExceptionSpec( 806 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 807 const FunctionProtoType *Old, SourceLocation OldLoc, 808 const FunctionProtoType *New, SourceLocation NewLoc, 809 bool *MissingExceptionSpecification = 0, 810 bool *MissingEmptyExceptionSpecification = 0, 811 bool AllowNoexceptAllMatchWithNoSpec = false, 812 bool IsOperatorNew = false); 813 bool CheckExceptionSpecSubset( 814 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 815 const FunctionProtoType *Superset, SourceLocation SuperLoc, 816 const FunctionProtoType *Subset, SourceLocation SubLoc); 817 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 818 const FunctionProtoType *Target, SourceLocation TargetLoc, 819 const FunctionProtoType *Source, SourceLocation SourceLoc); 820 821 TypeResult ActOnTypeName(Scope *S, Declarator &D); 822 823 /// \brief The parser has parsed the context-sensitive type 'instancetype' 824 /// in an Objective-C message declaration. Return the appropriate type. 825 ParsedType ActOnObjCInstanceType(SourceLocation Loc); 826 827 bool RequireCompleteType(SourceLocation Loc, QualType T, 828 const PartialDiagnostic &PD, 829 std::pair<SourceLocation, PartialDiagnostic> Note); 830 bool RequireCompleteType(SourceLocation Loc, QualType T, 831 const PartialDiagnostic &PD); 832 bool RequireCompleteType(SourceLocation Loc, QualType T, 833 unsigned DiagID); 834 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 835 std::pair<SourceLocation, 836 PartialDiagnostic> Note); 837 838 bool RequireLiteralType(SourceLocation Loc, QualType T, 839 const PartialDiagnostic &PD, 840 bool AllowIncompleteType = false); 841 842 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 843 const CXXScopeSpec &SS, QualType T); 844 845 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 846 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 847 QualType BuildUnaryTransformType(QualType BaseType, 848 UnaryTransformType::UTTKind UKind, 849 SourceLocation Loc); 850 851 //===--------------------------------------------------------------------===// 852 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 853 // 854 855 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 856 857 void DiagnoseUseOfUnimplementedSelectors(); 858 859 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 860 Scope *S, CXXScopeSpec *SS = 0, 861 bool isClassName = false, 862 bool HasTrailingDot = false, 863 ParsedType ObjectType = ParsedType(), 864 bool IsCtorOrDtorName = false, 865 bool WantNontrivialTypeSourceInfo = false, 866 IdentifierInfo **CorrectedII = 0); 867 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 868 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS, Scope *S); 869 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 870 SourceLocation IILoc, 871 Scope *S, 872 CXXScopeSpec *SS, 873 ParsedType &SuggestedType); 874 875 /// \brief Describes the result of the name lookup and resolution performed 876 /// by \c ClassifyName(). 877 enum NameClassificationKind { 878 NC_Unknown, 879 NC_Error, 880 NC_Keyword, 881 NC_Type, 882 NC_Expression, 883 NC_NestedNameSpecifier, 884 NC_TypeTemplate, 885 NC_FunctionTemplate 886 }; 887 888 class NameClassification { 889 NameClassificationKind Kind; 890 ExprResult Expr; 891 TemplateName Template; 892 ParsedType Type; 893 const IdentifierInfo *Keyword; 894 895 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 896 897 public: 898 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 899 900 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 901 902 NameClassification(const IdentifierInfo *Keyword) 903 : Kind(NC_Keyword), Keyword(Keyword) { } 904 905 static NameClassification Error() { 906 return NameClassification(NC_Error); 907 } 908 909 static NameClassification Unknown() { 910 return NameClassification(NC_Unknown); 911 } 912 913 static NameClassification NestedNameSpecifier() { 914 return NameClassification(NC_NestedNameSpecifier); 915 } 916 917 static NameClassification TypeTemplate(TemplateName Name) { 918 NameClassification Result(NC_TypeTemplate); 919 Result.Template = Name; 920 return Result; 921 } 922 923 static NameClassification FunctionTemplate(TemplateName Name) { 924 NameClassification Result(NC_FunctionTemplate); 925 Result.Template = Name; 926 return Result; 927 } 928 929 NameClassificationKind getKind() const { return Kind; } 930 931 ParsedType getType() const { 932 assert(Kind == NC_Type); 933 return Type; 934 } 935 936 ExprResult getExpression() const { 937 assert(Kind == NC_Expression); 938 return Expr; 939 } 940 941 TemplateName getTemplateName() const { 942 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 943 return Template; 944 } 945 946 TemplateNameKind getTemplateNameKind() const { 947 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 948 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 949 } 950}; 951 952 /// \brief Perform name lookup on the given name, classifying it based on 953 /// the results of name lookup and the following token. 954 /// 955 /// This routine is used by the parser to resolve identifiers and help direct 956 /// parsing. When the identifier cannot be found, this routine will attempt 957 /// to correct the typo and classify based on the resulting name. 958 /// 959 /// \param S The scope in which we're performing name lookup. 960 /// 961 /// \param SS The nested-name-specifier that precedes the name. 962 /// 963 /// \param Name The identifier. If typo correction finds an alternative name, 964 /// this pointer parameter will be updated accordingly. 965 /// 966 /// \param NameLoc The location of the identifier. 967 /// 968 /// \param NextToken The token following the identifier. Used to help 969 /// disambiguate the name. 970 NameClassification ClassifyName(Scope *S, 971 CXXScopeSpec &SS, 972 IdentifierInfo *&Name, 973 SourceLocation NameLoc, 974 const Token &NextToken); 975 976 Decl *ActOnDeclarator(Scope *S, Declarator &D); 977 978 Decl *HandleDeclarator(Scope *S, Declarator &D, 979 MultiTemplateParamsArg TemplateParameterLists); 980 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 981 const LookupResult &Previous, 982 Scope *S); 983 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 984 void DiagnoseFunctionSpecifiers(Declarator& D); 985 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 986 void CheckShadow(Scope *S, VarDecl *D); 987 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 988 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 989 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 990 TypeSourceInfo *TInfo, 991 LookupResult &Previous); 992 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 993 LookupResult &Previous, bool &Redeclaration); 994 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 995 TypeSourceInfo *TInfo, 996 LookupResult &Previous, 997 MultiTemplateParamsArg TemplateParamLists); 998 // Returns true if the variable declaration is a redeclaration 999 bool CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous); 1000 void CheckCompleteVariableDeclaration(VarDecl *var); 1001 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1002 TypeSourceInfo *TInfo, 1003 LookupResult &Previous, 1004 MultiTemplateParamsArg TemplateParamLists, 1005 bool &AddToScope); 1006 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1007 1008 /// \brief The kind of constexpr declaration checking we are performing. 1009 /// 1010 /// The kind affects which diagnostics (if any) are emitted if the function 1011 /// does not satisfy the requirements of a constexpr function declaration. 1012 enum CheckConstexprKind { 1013 /// \brief Check a constexpr function declaration, and produce errors if it 1014 /// does not satisfy the requirements. 1015 CCK_Declaration, 1016 /// \brief Check a constexpr function template instantiation. 1017 CCK_Instantiation, 1018 /// \brief Produce notes explaining why an instantiation was not constexpr. 1019 CCK_NoteNonConstexprInstantiation 1020 }; 1021 bool CheckConstexprFunctionDecl(const FunctionDecl *FD, 1022 CheckConstexprKind CCK); 1023 bool CheckConstexprFunctionBody(const FunctionDecl *FD, Stmt *Body, 1024 bool IsInstantiation); 1025 1026 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1027 // Returns true if the function declaration is a redeclaration 1028 bool CheckFunctionDeclaration(Scope *S, 1029 FunctionDecl *NewFD, LookupResult &Previous, 1030 bool IsExplicitSpecialization); 1031 void CheckMain(FunctionDecl *FD, const DeclSpec &D); 1032 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1033 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1034 SourceLocation Loc, 1035 QualType T); 1036 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1037 SourceLocation NameLoc, IdentifierInfo *Name, 1038 QualType T, TypeSourceInfo *TSInfo, 1039 StorageClass SC, StorageClass SCAsWritten); 1040 void ActOnParamDefaultArgument(Decl *param, 1041 SourceLocation EqualLoc, 1042 Expr *defarg); 1043 void ActOnParamUnparsedDefaultArgument(Decl *param, 1044 SourceLocation EqualLoc, 1045 SourceLocation ArgLoc); 1046 void ActOnParamDefaultArgumentError(Decl *param); 1047 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1048 SourceLocation EqualLoc); 1049 1050 void CheckSelfReference(Decl *OrigDecl, Expr *E); 1051 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1052 bool TypeMayContainAuto); 1053 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1054 void ActOnInitializerError(Decl *Dcl); 1055 void ActOnCXXForRangeDecl(Decl *D); 1056 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1057 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1058 void FinalizeDeclaration(Decl *D); 1059 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1060 Decl **Group, 1061 unsigned NumDecls); 1062 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1063 bool TypeMayContainAuto = true); 1064 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1065 SourceLocation LocAfterDecls); 1066 void CheckForFunctionRedefinition(FunctionDecl *FD); 1067 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1068 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1069 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1070 1071 void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope); 1072 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1073 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1074 1075 /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an 1076 /// attribute for which parsing is delayed. 1077 void ActOnFinishDelayedAttribute(Scope *S, Decl *D, ParsedAttributes &Attrs); 1078 1079 /// \brief Diagnose any unused parameters in the given sequence of 1080 /// ParmVarDecl pointers. 1081 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1082 ParmVarDecl * const *End); 1083 1084 /// \brief Diagnose whether the size of parameters or return value of a 1085 /// function or obj-c method definition is pass-by-value and larger than a 1086 /// specified threshold. 1087 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1088 ParmVarDecl * const *End, 1089 QualType ReturnTy, 1090 NamedDecl *D); 1091 1092 void DiagnoseInvalidJumps(Stmt *Body); 1093 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1094 SourceLocation AsmLoc, 1095 SourceLocation RParenLoc); 1096 1097 /// \brief The parser has processed a module import declaration. 1098 /// 1099 /// \param AtLoc The location of the '@' symbol, if any. 1100 /// 1101 /// \param ImportLoc The location of the 'import' keyword. 1102 /// 1103 /// \param Path The module access path. 1104 DeclResult ActOnModuleImport(SourceLocation AtLoc, SourceLocation ImportLoc, 1105 ModuleIdPath Path); 1106 1107 /// \brief Retrieve a suitable printing policy. 1108 PrintingPolicy getPrintingPolicy() const { 1109 return getPrintingPolicy(Context, PP); 1110 } 1111 1112 /// \brief Retrieve a suitable printing policy. 1113 static PrintingPolicy getPrintingPolicy(const ASTContext &Ctx, 1114 const Preprocessor &PP); 1115 1116 /// Scope actions. 1117 void ActOnPopScope(SourceLocation Loc, Scope *S); 1118 void ActOnTranslationUnitScope(Scope *S); 1119 1120 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1121 DeclSpec &DS); 1122 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1123 DeclSpec &DS, 1124 MultiTemplateParamsArg TemplateParams); 1125 1126 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1127 AccessSpecifier AS, 1128 RecordDecl *Record); 1129 1130 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1131 RecordDecl *Record); 1132 1133 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1134 TagTypeKind NewTag, bool isDefinition, 1135 SourceLocation NewTagLoc, 1136 const IdentifierInfo &Name); 1137 1138 enum TagUseKind { 1139 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1140 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1141 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1142 TUK_Friend // Friend declaration: 'friend struct foo;' 1143 }; 1144 1145 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1146 SourceLocation KWLoc, CXXScopeSpec &SS, 1147 IdentifierInfo *Name, SourceLocation NameLoc, 1148 AttributeList *Attr, AccessSpecifier AS, 1149 SourceLocation ModulePrivateLoc, 1150 MultiTemplateParamsArg TemplateParameterLists, 1151 bool &OwnedDecl, bool &IsDependent, 1152 SourceLocation ScopedEnumKWLoc, 1153 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1154 1155 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1156 unsigned TagSpec, SourceLocation TagLoc, 1157 CXXScopeSpec &SS, 1158 IdentifierInfo *Name, SourceLocation NameLoc, 1159 AttributeList *Attr, 1160 MultiTemplateParamsArg TempParamLists); 1161 1162 TypeResult ActOnDependentTag(Scope *S, 1163 unsigned TagSpec, 1164 TagUseKind TUK, 1165 const CXXScopeSpec &SS, 1166 IdentifierInfo *Name, 1167 SourceLocation TagLoc, 1168 SourceLocation NameLoc); 1169 1170 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1171 IdentifierInfo *ClassName, 1172 SmallVectorImpl<Decl *> &Decls); 1173 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1174 Declarator &D, Expr *BitfieldWidth); 1175 1176 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1177 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1178 AccessSpecifier AS); 1179 1180 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1181 TypeSourceInfo *TInfo, 1182 RecordDecl *Record, SourceLocation Loc, 1183 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1184 SourceLocation TSSL, 1185 AccessSpecifier AS, NamedDecl *PrevDecl, 1186 Declarator *D = 0); 1187 1188 enum CXXSpecialMember { 1189 CXXDefaultConstructor, 1190 CXXCopyConstructor, 1191 CXXMoveConstructor, 1192 CXXCopyAssignment, 1193 CXXMoveAssignment, 1194 CXXDestructor, 1195 CXXInvalid 1196 }; 1197 bool CheckNontrivialField(FieldDecl *FD); 1198 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1199 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1200 void ActOnLastBitfield(SourceLocation DeclStart, 1201 SmallVectorImpl<Decl *> &AllIvarDecls); 1202 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, 1203 Declarator &D, Expr *BitfieldWidth, 1204 tok::ObjCKeywordKind visibility); 1205 1206 // This is used for both record definitions and ObjC interface declarations. 1207 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1208 llvm::ArrayRef<Decl *> Fields, 1209 SourceLocation LBrac, SourceLocation RBrac, 1210 AttributeList *AttrList); 1211 1212 /// ActOnTagStartDefinition - Invoked when we have entered the 1213 /// scope of a tag's definition (e.g., for an enumeration, class, 1214 /// struct, or union). 1215 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1216 1217 Decl *ActOnObjCContainerStartDefinition(Decl *IDecl); 1218 1219 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1220 /// C++ record definition's base-specifiers clause and are starting its 1221 /// member declarations. 1222 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1223 SourceLocation FinalLoc, 1224 SourceLocation LBraceLoc); 1225 1226 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1227 /// the definition of a tag (enumeration, class, struct, or union). 1228 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1229 SourceLocation RBraceLoc); 1230 1231 void ActOnObjCContainerFinishDefinition(); 1232 1233 /// \brief Invoked when we must temporarily exit the objective-c container 1234 /// scope for parsing/looking-up C constructs. 1235 /// 1236 /// Must be followed by a call to \see ActOnObjCReenterContainerContext 1237 void ActOnObjCTemporaryExitContainerContext(DeclContext *DC); 1238 void ActOnObjCReenterContainerContext(DeclContext *DC); 1239 1240 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1241 /// error parsing the definition of a tag. 1242 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1243 1244 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1245 EnumConstantDecl *LastEnumConst, 1246 SourceLocation IdLoc, 1247 IdentifierInfo *Id, 1248 Expr *val); 1249 1250 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1251 SourceLocation IdLoc, IdentifierInfo *Id, 1252 AttributeList *Attrs, 1253 SourceLocation EqualLoc, Expr *Val); 1254 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1255 SourceLocation RBraceLoc, Decl *EnumDecl, 1256 Decl **Elements, unsigned NumElements, 1257 Scope *S, AttributeList *Attr); 1258 1259 DeclContext *getContainingDC(DeclContext *DC); 1260 1261 /// Set the current declaration context until it gets popped. 1262 void PushDeclContext(Scope *S, DeclContext *DC); 1263 void PopDeclContext(); 1264 1265 /// EnterDeclaratorContext - Used when we must lookup names in the context 1266 /// of a declarator's nested name specifier. 1267 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1268 void ExitDeclaratorContext(Scope *S); 1269 1270 /// Push the parameters of D, which must be a function, into scope. 1271 void ActOnReenterFunctionContext(Scope* S, Decl* D); 1272 void ActOnExitFunctionContext() { PopDeclContext(); } 1273 1274 DeclContext *getFunctionLevelDeclContext(); 1275 1276 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1277 /// to the function decl for the function being parsed. If we're currently 1278 /// in a 'block', this returns the containing context. 1279 FunctionDecl *getCurFunctionDecl(); 1280 1281 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1282 /// the method decl for the method being parsed. If we're currently 1283 /// in a 'block', this returns the containing context. 1284 ObjCMethodDecl *getCurMethodDecl(); 1285 1286 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1287 /// or C function we're in, otherwise return null. If we're currently 1288 /// in a 'block', this returns the containing context. 1289 NamedDecl *getCurFunctionOrMethodDecl(); 1290 1291 /// Add this decl to the scope shadowed decl chains. 1292 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1293 1294 /// \brief Make the given externally-produced declaration visible at the 1295 /// top level scope. 1296 /// 1297 /// \param D The externally-produced declaration to push. 1298 /// 1299 /// \param Name The name of the externally-produced declaration. 1300 void pushExternalDeclIntoScope(NamedDecl *D, DeclarationName Name); 1301 1302 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1303 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1304 /// true if 'D' belongs to the given declaration context. 1305 /// 1306 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1307 /// whether the declaration is in scope for the purposes of explicit template 1308 /// instantiation or specialization. The default is false. 1309 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1310 bool ExplicitInstantiationOrSpecialization = false); 1311 1312 /// Finds the scope corresponding to the given decl context, if it 1313 /// happens to be an enclosing scope. Otherwise return NULL. 1314 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1315 1316 /// Subroutines of ActOnDeclarator(). 1317 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1318 TypeSourceInfo *TInfo); 1319 bool isIncompatibleTypedef(TypeDecl *Old, TypedefNameDecl *New); 1320 void mergeDeclAttributes(Decl *New, Decl *Old, bool MergeDeprecation = true); 1321 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1322 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1323 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1324 void mergeObjCMethodDecls(ObjCMethodDecl *New, ObjCMethodDecl *Old); 1325 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1326 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1327 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1328 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1329 1330 // AssignmentAction - This is used by all the assignment diagnostic functions 1331 // to represent what is actually causing the operation 1332 enum AssignmentAction { 1333 AA_Assigning, 1334 AA_Passing, 1335 AA_Returning, 1336 AA_Converting, 1337 AA_Initializing, 1338 AA_Sending, 1339 AA_Casting 1340 }; 1341 1342 /// C++ Overloading. 1343 enum OverloadKind { 1344 /// This is a legitimate overload: the existing declarations are 1345 /// functions or function templates with different signatures. 1346 Ovl_Overload, 1347 1348 /// This is not an overload because the signature exactly matches 1349 /// an existing declaration. 1350 Ovl_Match, 1351 1352 /// This is not an overload because the lookup results contain a 1353 /// non-function. 1354 Ovl_NonFunction 1355 }; 1356 OverloadKind CheckOverload(Scope *S, 1357 FunctionDecl *New, 1358 const LookupResult &OldDecls, 1359 NamedDecl *&OldDecl, 1360 bool IsForUsingDecl); 1361 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1362 1363 /// \brief Checks availability of the function depending on the current 1364 /// function context.Inside an unavailable function,unavailability is ignored. 1365 /// 1366 /// \returns true if \arg FD is unavailable and current context is inside 1367 /// an available function, false otherwise. 1368 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1369 1370 ImplicitConversionSequence 1371 TryImplicitConversion(Expr *From, QualType ToType, 1372 bool SuppressUserConversions, 1373 bool AllowExplicit, 1374 bool InOverloadResolution, 1375 bool CStyle, 1376 bool AllowObjCWritebackConversion); 1377 1378 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1379 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1380 bool IsComplexPromotion(QualType FromType, QualType ToType); 1381 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1382 bool InOverloadResolution, 1383 QualType& ConvertedType, bool &IncompatibleObjC); 1384 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1385 QualType& ConvertedType, bool &IncompatibleObjC); 1386 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1387 QualType &ConvertedType); 1388 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1389 QualType& ConvertedType); 1390 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1391 const FunctionProtoType *NewType, 1392 unsigned *ArgPos = 0); 1393 void HandleFunctionTypeMismatch(PartialDiagnostic &PDiag, 1394 QualType FromType, QualType ToType); 1395 1396 CastKind PrepareCastToObjCObjectPointer(ExprResult &E); 1397 bool CheckPointerConversion(Expr *From, QualType ToType, 1398 CastKind &Kind, 1399 CXXCastPath& BasePath, 1400 bool IgnoreBaseAccess); 1401 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1402 bool InOverloadResolution, 1403 QualType &ConvertedType); 1404 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1405 CastKind &Kind, 1406 CXXCastPath &BasePath, 1407 bool IgnoreBaseAccess); 1408 bool IsQualificationConversion(QualType FromType, QualType ToType, 1409 bool CStyle, bool &ObjCLifetimeConversion); 1410 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1411 QualType &ResultTy); 1412 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1413 1414 1415 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1416 const VarDecl *NRVOCandidate, 1417 QualType ResultType, 1418 Expr *Value, 1419 bool AllowNRVO = true); 1420 1421 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1422 ExprResult Init); 1423 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1424 SourceLocation EqualLoc, 1425 ExprResult Init, 1426 bool TopLevelOfInitList = false); 1427 ExprResult PerformObjectArgumentInitialization(Expr *From, 1428 NestedNameSpecifier *Qualifier, 1429 NamedDecl *FoundDecl, 1430 CXXMethodDecl *Method); 1431 1432 ExprResult PerformContextuallyConvertToBool(Expr *From); 1433 ExprResult PerformContextuallyConvertToObjCPointer(Expr *From); 1434 1435 /// Contexts in which a converted constant expression is required. 1436 enum CCEKind { 1437 CCEK_CaseValue, ///< Expression in a case label. 1438 CCEK_Enumerator, ///< Enumerator value with fixed underlying type. 1439 CCEK_TemplateArg ///< Value of a non-type template parameter. 1440 }; 1441 ExprResult CheckConvertedConstantExpression(Expr *From, QualType T, 1442 llvm::APSInt &Value, CCEKind CCE); 1443 1444 ExprResult 1445 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1446 const PartialDiagnostic &NotIntDiag, 1447 const PartialDiagnostic &IncompleteDiag, 1448 const PartialDiagnostic &ExplicitConvDiag, 1449 const PartialDiagnostic &ExplicitConvNote, 1450 const PartialDiagnostic &AmbigDiag, 1451 const PartialDiagnostic &AmbigNote, 1452 const PartialDiagnostic &ConvDiag, 1453 bool AllowScopedEnumerations); 1454 1455 ExprResult PerformObjectMemberConversion(Expr *From, 1456 NestedNameSpecifier *Qualifier, 1457 NamedDecl *FoundDecl, 1458 NamedDecl *Member); 1459 1460 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1461 // TODO: make this is a typesafe union. 1462 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1463 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1464 1465 void AddOverloadCandidate(FunctionDecl *Function, 1466 DeclAccessPair FoundDecl, 1467 Expr **Args, unsigned NumArgs, 1468 OverloadCandidateSet& CandidateSet, 1469 bool SuppressUserConversions = false, 1470 bool PartialOverloading = false); 1471 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1472 Expr **Args, unsigned NumArgs, 1473 OverloadCandidateSet& CandidateSet, 1474 bool SuppressUserConversions = false); 1475 void AddMethodCandidate(DeclAccessPair FoundDecl, 1476 QualType ObjectType, 1477 Expr::Classification ObjectClassification, 1478 Expr **Args, unsigned NumArgs, 1479 OverloadCandidateSet& CandidateSet, 1480 bool SuppressUserConversion = false); 1481 void AddMethodCandidate(CXXMethodDecl *Method, 1482 DeclAccessPair FoundDecl, 1483 CXXRecordDecl *ActingContext, QualType ObjectType, 1484 Expr::Classification ObjectClassification, 1485 Expr **Args, unsigned NumArgs, 1486 OverloadCandidateSet& CandidateSet, 1487 bool SuppressUserConversions = false); 1488 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1489 DeclAccessPair FoundDecl, 1490 CXXRecordDecl *ActingContext, 1491 TemplateArgumentListInfo *ExplicitTemplateArgs, 1492 QualType ObjectType, 1493 Expr::Classification ObjectClassification, 1494 Expr **Args, unsigned NumArgs, 1495 OverloadCandidateSet& CandidateSet, 1496 bool SuppressUserConversions = false); 1497 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1498 DeclAccessPair FoundDecl, 1499 TemplateArgumentListInfo *ExplicitTemplateArgs, 1500 Expr **Args, unsigned NumArgs, 1501 OverloadCandidateSet& CandidateSet, 1502 bool SuppressUserConversions = false); 1503 void AddConversionCandidate(CXXConversionDecl *Conversion, 1504 DeclAccessPair FoundDecl, 1505 CXXRecordDecl *ActingContext, 1506 Expr *From, QualType ToType, 1507 OverloadCandidateSet& CandidateSet); 1508 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1509 DeclAccessPair FoundDecl, 1510 CXXRecordDecl *ActingContext, 1511 Expr *From, QualType ToType, 1512 OverloadCandidateSet &CandidateSet); 1513 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1514 DeclAccessPair FoundDecl, 1515 CXXRecordDecl *ActingContext, 1516 const FunctionProtoType *Proto, 1517 Expr *Object, Expr **Args, unsigned NumArgs, 1518 OverloadCandidateSet& CandidateSet); 1519 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1520 SourceLocation OpLoc, 1521 Expr **Args, unsigned NumArgs, 1522 OverloadCandidateSet& CandidateSet, 1523 SourceRange OpRange = SourceRange()); 1524 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1525 Expr **Args, unsigned NumArgs, 1526 OverloadCandidateSet& CandidateSet, 1527 bool IsAssignmentOperator = false, 1528 unsigned NumContextualBoolArguments = 0); 1529 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1530 SourceLocation OpLoc, 1531 Expr **Args, unsigned NumArgs, 1532 OverloadCandidateSet& CandidateSet); 1533 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1534 bool Operator, 1535 Expr **Args, unsigned NumArgs, 1536 TemplateArgumentListInfo *ExplicitTemplateArgs, 1537 OverloadCandidateSet& CandidateSet, 1538 bool PartialOverloading = false, 1539 bool StdNamespaceIsAssociated = false); 1540 1541 // Emit as a 'note' the specific overload candidate 1542 void NoteOverloadCandidate(FunctionDecl *Fn, QualType DestType = QualType()); 1543 1544 // Emit as a series of 'note's all template and non-templates 1545 // identified by the expression Expr 1546 void NoteAllOverloadCandidates(Expr* E, QualType DestType = QualType()); 1547 1548 // [PossiblyAFunctionType] --> [Return] 1549 // NonFunctionType --> NonFunctionType 1550 // R (A) --> R(A) 1551 // R (*)(A) --> R (A) 1552 // R (&)(A) --> R (A) 1553 // R (S::*)(A) --> R (A) 1554 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1555 1556 FunctionDecl * 1557 ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, 1558 QualType TargetType, 1559 bool Complain, 1560 DeclAccessPair &Found, 1561 bool *pHadMultipleCandidates = 0); 1562 1563 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1564 bool Complain = false, 1565 DeclAccessPair* Found = 0); 1566 1567 bool ResolveAndFixSingleFunctionTemplateSpecialization( 1568 ExprResult &SrcExpr, 1569 bool DoFunctionPointerConverion = false, 1570 bool Complain = false, 1571 const SourceRange& OpRangeForComplaining = SourceRange(), 1572 QualType DestTypeForComplaining = QualType(), 1573 unsigned DiagIDForComplaining = 0); 1574 1575 1576 Expr *FixOverloadedFunctionReference(Expr *E, 1577 DeclAccessPair FoundDecl, 1578 FunctionDecl *Fn); 1579 ExprResult FixOverloadedFunctionReference(ExprResult, 1580 DeclAccessPair FoundDecl, 1581 FunctionDecl *Fn); 1582 1583 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1584 Expr **Args, unsigned NumArgs, 1585 OverloadCandidateSet &CandidateSet, 1586 bool PartialOverloading = false); 1587 1588 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1589 UnresolvedLookupExpr *ULE, 1590 SourceLocation LParenLoc, 1591 Expr **Args, unsigned NumArgs, 1592 SourceLocation RParenLoc, 1593 Expr *ExecConfig, 1594 bool AllowTypoCorrection=true); 1595 1596 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1597 unsigned Opc, 1598 const UnresolvedSetImpl &Fns, 1599 Expr *input); 1600 1601 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1602 unsigned Opc, 1603 const UnresolvedSetImpl &Fns, 1604 Expr *LHS, Expr *RHS); 1605 1606 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1607 SourceLocation RLoc, 1608 Expr *Base,Expr *Idx); 1609 1610 ExprResult 1611 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1612 SourceLocation LParenLoc, Expr **Args, 1613 unsigned NumArgs, SourceLocation RParenLoc); 1614 ExprResult 1615 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1616 Expr **Args, unsigned NumArgs, 1617 SourceLocation RParenLoc); 1618 1619 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1620 SourceLocation OpLoc); 1621 1622 /// CheckCallReturnType - Checks that a call expression's return type is 1623 /// complete. Returns true on failure. The location passed in is the location 1624 /// that best represents the call. 1625 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1626 CallExpr *CE, FunctionDecl *FD); 1627 1628 /// Helpers for dealing with blocks and functions. 1629 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1630 bool CheckParameterNames); 1631 void CheckCXXDefaultArguments(FunctionDecl *FD); 1632 void CheckExtraCXXDefaultArguments(Declarator &D); 1633 Scope *getNonFieldDeclScope(Scope *S); 1634 1635 /// \name Name lookup 1636 /// 1637 /// These routines provide name lookup that is used during semantic 1638 /// analysis to resolve the various kinds of names (identifiers, 1639 /// overloaded operator names, constructor names, etc.) into zero or 1640 /// more declarations within a particular scope. The major entry 1641 /// points are LookupName, which performs unqualified name lookup, 1642 /// and LookupQualifiedName, which performs qualified name lookup. 1643 /// 1644 /// All name lookup is performed based on some specific criteria, 1645 /// which specify what names will be visible to name lookup and how 1646 /// far name lookup should work. These criteria are important both 1647 /// for capturing language semantics (certain lookups will ignore 1648 /// certain names, for example) and for performance, since name 1649 /// lookup is often a bottleneck in the compilation of C++. Name 1650 /// lookup criteria is specified via the LookupCriteria enumeration. 1651 /// 1652 /// The results of name lookup can vary based on the kind of name 1653 /// lookup performed, the current language, and the translation 1654 /// unit. In C, for example, name lookup will either return nothing 1655 /// (no entity found) or a single declaration. In C++, name lookup 1656 /// can additionally refer to a set of overloaded functions or 1657 /// result in an ambiguity. All of the possible results of name 1658 /// lookup are captured by the LookupResult class, which provides 1659 /// the ability to distinguish among them. 1660 //@{ 1661 1662 /// @brief Describes the kind of name lookup to perform. 1663 enum LookupNameKind { 1664 /// Ordinary name lookup, which finds ordinary names (functions, 1665 /// variables, typedefs, etc.) in C and most kinds of names 1666 /// (functions, variables, members, types, etc.) in C++. 1667 LookupOrdinaryName = 0, 1668 /// Tag name lookup, which finds the names of enums, classes, 1669 /// structs, and unions. 1670 LookupTagName, 1671 /// Label name lookup. 1672 LookupLabel, 1673 /// Member name lookup, which finds the names of 1674 /// class/struct/union members. 1675 LookupMemberName, 1676 /// Look up of an operator name (e.g., operator+) for use with 1677 /// operator overloading. This lookup is similar to ordinary name 1678 /// lookup, but will ignore any declarations that are class members. 1679 LookupOperatorName, 1680 /// Look up of a name that precedes the '::' scope resolution 1681 /// operator in C++. This lookup completely ignores operator, object, 1682 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1683 LookupNestedNameSpecifierName, 1684 /// Look up a namespace name within a C++ using directive or 1685 /// namespace alias definition, ignoring non-namespace names (C++ 1686 /// [basic.lookup.udir]p1). 1687 LookupNamespaceName, 1688 /// Look up all declarations in a scope with the given name, 1689 /// including resolved using declarations. This is appropriate 1690 /// for checking redeclarations for a using declaration. 1691 LookupUsingDeclName, 1692 /// Look up an ordinary name that is going to be redeclared as a 1693 /// name with linkage. This lookup ignores any declarations that 1694 /// are outside of the current scope unless they have linkage. See 1695 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1696 LookupRedeclarationWithLinkage, 1697 /// Look up the name of an Objective-C protocol. 1698 LookupObjCProtocolName, 1699 /// Look up implicit 'self' parameter of an objective-c method. 1700 LookupObjCImplicitSelfParam, 1701 /// \brief Look up any declaration with any name. 1702 LookupAnyName 1703 }; 1704 1705 /// \brief Specifies whether (or how) name lookup is being performed for a 1706 /// redeclaration (vs. a reference). 1707 enum RedeclarationKind { 1708 /// \brief The lookup is a reference to this name that is not for the 1709 /// purpose of redeclaring the name. 1710 NotForRedeclaration = 0, 1711 /// \brief The lookup results will be used for redeclaration of a name, 1712 /// if an entity by that name already exists. 1713 ForRedeclaration 1714 }; 1715 1716private: 1717 bool CppLookupName(LookupResult &R, Scope *S); 1718 1719 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1720 CXXSpecialMember SM, 1721 bool ConstArg, 1722 bool VolatileArg, 1723 bool RValueThis, 1724 bool ConstThis, 1725 bool VolatileThis); 1726 1727 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1728 // 1729 // The boolean value will be true to indicate that the namespace was loaded 1730 // from an AST/PCH file, or false otherwise. 1731 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1732 1733 /// \brief Whether we have already loaded known namespaces from an extenal 1734 /// source. 1735 bool LoadedExternalKnownNamespaces; 1736 1737public: 1738 /// \brief Look up a name, looking for a single declaration. Return 1739 /// null if the results were absent, ambiguous, or overloaded. 1740 /// 1741 /// It is preferable to use the elaborated form and explicitly handle 1742 /// ambiguity and overloaded. 1743 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1744 SourceLocation Loc, 1745 LookupNameKind NameKind, 1746 RedeclarationKind Redecl 1747 = NotForRedeclaration); 1748 bool LookupName(LookupResult &R, Scope *S, 1749 bool AllowBuiltinCreation = false); 1750 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1751 bool InUnqualifiedLookup = false); 1752 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1753 bool AllowBuiltinCreation = false, 1754 bool EnteringContext = false); 1755 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc, 1756 RedeclarationKind Redecl 1757 = NotForRedeclaration); 1758 1759 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1760 QualType T1, QualType T2, 1761 UnresolvedSetImpl &Functions); 1762 1763 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1764 SourceLocation GnuLabelLoc = SourceLocation()); 1765 1766 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1767 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1768 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1769 unsigned Quals, 1770 bool *ConstParam = 0); 1771 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1772 bool RValueThis, unsigned ThisQuals, 1773 bool *ConstParam = 0); 1774 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class); 1775 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, bool RValueThis, 1776 unsigned ThisQuals); 1777 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1778 1779 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1780 Expr **Args, unsigned NumArgs, 1781 ADLResult &Functions, 1782 bool StdNamespaceIsAssociated = false); 1783 1784 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1785 VisibleDeclConsumer &Consumer, 1786 bool IncludeGlobalScope = true); 1787 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1788 VisibleDeclConsumer &Consumer, 1789 bool IncludeGlobalScope = true); 1790 1791 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1792 Sema::LookupNameKind LookupKind, 1793 Scope *S, CXXScopeSpec *SS, 1794 CorrectionCandidateCallback &CCC, 1795 DeclContext *MemberContext = 0, 1796 bool EnteringContext = false, 1797 const ObjCObjectPointerType *OPT = 0); 1798 1799 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1800 AssociatedNamespaceSet &AssociatedNamespaces, 1801 AssociatedClassSet &AssociatedClasses); 1802 1803 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1804 bool ConsiderLinkage, 1805 bool ExplicitInstantiationOrSpecialization); 1806 1807 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1808 //@} 1809 1810 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1811 SourceLocation IdLoc, 1812 bool TypoCorrection = false); 1813 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1814 Scope *S, bool ForRedeclaration, 1815 SourceLocation Loc); 1816 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1817 Scope *S); 1818 void AddKnownFunctionAttributes(FunctionDecl *FD); 1819 1820 // More parsing and symbol table subroutines. 1821 1822 // Decl attributes - this routine is the top level dispatcher. 1823 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1824 bool NonInheritable = true, bool Inheritable = true); 1825 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1826 bool NonInheritable = true, bool Inheritable = true); 1827 bool ProcessAccessDeclAttributeList(AccessSpecDecl *ASDecl, 1828 const AttributeList *AttrList); 1829 1830 void checkUnusedDeclAttributes(Declarator &D); 1831 1832 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1833 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1834 bool CheckNoReturnAttr(const AttributeList &attr); 1835 1836 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1837 bool &IncompleteImpl, unsigned DiagID); 1838 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 1839 ObjCMethodDecl *MethodDecl, 1840 bool IsProtocolMethodDecl); 1841 1842 void CheckConflictingOverridingMethod(ObjCMethodDecl *Method, 1843 ObjCMethodDecl *Overridden, 1844 bool IsProtocolMethodDecl); 1845 1846 /// WarnExactTypedMethods - This routine issues a warning if method 1847 /// implementation declaration matches exactly that of its declaration. 1848 void WarnExactTypedMethods(ObjCMethodDecl *Method, 1849 ObjCMethodDecl *MethodDecl, 1850 bool IsProtocolMethodDecl); 1851 1852 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1853 ObjCInterfaceDecl *IDecl); 1854 1855 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1856 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap; 1857 1858 /// CheckProtocolMethodDefs - This routine checks unimplemented 1859 /// methods declared in protocol, and those referenced by it. 1860 /// \param IDecl - Used for checking for methods which may have been 1861 /// inherited. 1862 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1863 ObjCProtocolDecl *PDecl, 1864 bool& IncompleteImpl, 1865 const SelectorSet &InsMap, 1866 const SelectorSet &ClsMap, 1867 ObjCContainerDecl *CDecl); 1868 1869 /// CheckImplementationIvars - This routine checks if the instance variables 1870 /// listed in the implelementation match those listed in the interface. 1871 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1872 ObjCIvarDecl **Fields, unsigned nIvars, 1873 SourceLocation Loc); 1874 1875 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1876 /// remains unimplemented in the class or category @implementation. 1877 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1878 ObjCContainerDecl* IDecl, 1879 bool IncompleteImpl = false); 1880 1881 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1882 /// which must be implemented by this implementation. 1883 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1884 ObjCContainerDecl *CDecl, 1885 const SelectorSet &InsMap); 1886 1887 /// DefaultSynthesizeProperties - This routine default synthesizes all 1888 /// properties which must be synthesized in class's @implementation. 1889 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1890 ObjCInterfaceDecl *IDecl); 1891 void DefaultSynthesizeProperties(Scope *S, Decl *D); 1892 1893 /// CollectImmediateProperties - This routine collects all properties in 1894 /// the class and its conforming protocols; but not those it its super class. 1895 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1896 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1897 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1898 1899 1900 /// LookupPropertyDecl - Looks up a property in the current class and all 1901 /// its protocols. 1902 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1903 IdentifierInfo *II); 1904 1905 /// Called by ActOnProperty to handle @property declarations in 1906 //// class extensions. 1907 Decl *HandlePropertyInClassExtension(Scope *S, 1908 SourceLocation AtLoc, 1909 FieldDeclarator &FD, 1910 Selector GetterSel, 1911 Selector SetterSel, 1912 const bool isAssign, 1913 const bool isReadWrite, 1914 const unsigned Attributes, 1915 const unsigned AttributesAsWritten, 1916 bool *isOverridingProperty, 1917 TypeSourceInfo *T, 1918 tok::ObjCKeywordKind MethodImplKind); 1919 1920 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1921 /// handle creating the ObjcPropertyDecl for a category or @interface. 1922 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1923 ObjCContainerDecl *CDecl, 1924 SourceLocation AtLoc, 1925 FieldDeclarator &FD, 1926 Selector GetterSel, 1927 Selector SetterSel, 1928 const bool isAssign, 1929 const bool isReadWrite, 1930 const unsigned Attributes, 1931 const unsigned AttributesAsWritten, 1932 TypeSourceInfo *T, 1933 tok::ObjCKeywordKind MethodImplKind, 1934 DeclContext *lexicalDC = 0); 1935 1936 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1937 /// warning) when atomic property has one but not the other user-declared 1938 /// setter or getter. 1939 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1940 ObjCContainerDecl* IDecl); 1941 1942 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 1943 1944 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1945 1946 enum MethodMatchStrategy { 1947 MMS_loose, 1948 MMS_strict 1949 }; 1950 1951 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1952 /// true, or false, accordingly. 1953 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1954 const ObjCMethodDecl *PrevMethod, 1955 MethodMatchStrategy strategy = MMS_strict); 1956 1957 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1958 /// or protocol against those declared in their implementations. 1959 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1960 const SelectorSet &ClsMap, 1961 SelectorSet &InsMapSeen, 1962 SelectorSet &ClsMapSeen, 1963 ObjCImplDecl* IMPDecl, 1964 ObjCContainerDecl* IDecl, 1965 bool &IncompleteImpl, 1966 bool ImmediateClass, 1967 bool WarnCategoryMethodImpl=false); 1968 1969 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in 1970 /// category matches with those implemented in its primary class and 1971 /// warns each time an exact match is found. 1972 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP); 1973 1974 /// \brief Add the given method to the list of globally-known methods. 1975 void addMethodToGlobalList(ObjCMethodList *List, ObjCMethodDecl *Method); 1976 1977private: 1978 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1979 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1980 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1981 1982 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1983 /// optionally warns if there are multiple signatures. 1984 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1985 bool receiverIdOrClass, 1986 bool warn, bool instance); 1987 1988public: 1989 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1990 /// unit are added to a global pool. This allows us to efficiently associate 1991 /// a selector with a method declaraation for purposes of typechecking 1992 /// messages sent to "id" (where the class of the object is unknown). 1993 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1994 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1995 } 1996 1997 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1998 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1999 AddMethodToGlobalPool(Method, impl, /*instance*/false); 2000 } 2001 2002 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global 2003 /// pool. 2004 void AddAnyMethodToGlobalPool(Decl *D); 2005 2006 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 2007 /// there are multiple signatures. 2008 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 2009 bool receiverIdOrClass=false, 2010 bool warn=true) { 2011 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2012 warn, /*instance*/true); 2013 } 2014 2015 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 2016 /// there are multiple signatures. 2017 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 2018 bool receiverIdOrClass=false, 2019 bool warn=true) { 2020 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2021 warn, /*instance*/false); 2022 } 2023 2024 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 2025 /// implementation. 2026 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 2027 2028 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 2029 /// initialization. 2030 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 2031 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 2032 2033 //===--------------------------------------------------------------------===// 2034 // Statement Parsing Callbacks: SemaStmt.cpp. 2035public: 2036 class FullExprArg { 2037 public: 2038 FullExprArg(Sema &actions) : E(0) { } 2039 2040 // FIXME: The const_cast here is ugly. RValue references would make this 2041 // much nicer (or we could duplicate a bunch of the move semantics 2042 // emulation code from Ownership.h). 2043 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 2044 2045 ExprResult release() { 2046 return move(E); 2047 } 2048 2049 Expr *get() const { return E; } 2050 2051 Expr *operator->() { 2052 return E; 2053 } 2054 2055 private: 2056 // FIXME: No need to make the entire Sema class a friend when it's just 2057 // Sema::MakeFullExpr that needs access to the constructor below. 2058 friend class Sema; 2059 2060 explicit FullExprArg(Expr *expr) : E(expr) {} 2061 2062 Expr *E; 2063 }; 2064 2065 FullExprArg MakeFullExpr(Expr *Arg) { 2066 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 2067 } 2068 2069 StmtResult ActOnExprStmt(FullExprArg Expr); 2070 2071 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 2072 bool HasLeadingEmptyMacro = false); 2073 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 2074 MultiStmtArg Elts, 2075 bool isStmtExpr); 2076 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2077 SourceLocation StartLoc, 2078 SourceLocation EndLoc); 2079 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2080 StmtResult ActOnForEachLValueExpr(Expr *E); 2081 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2082 SourceLocation DotDotDotLoc, Expr *RHSVal, 2083 SourceLocation ColonLoc); 2084 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2085 2086 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2087 SourceLocation ColonLoc, 2088 Stmt *SubStmt, Scope *CurScope); 2089 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2090 SourceLocation ColonLoc, Stmt *SubStmt); 2091 2092 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2093 FullExprArg CondVal, Decl *CondVar, 2094 Stmt *ThenVal, 2095 SourceLocation ElseLoc, Stmt *ElseVal); 2096 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2097 Expr *Cond, 2098 Decl *CondVar); 2099 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2100 Stmt *Switch, Stmt *Body); 2101 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2102 FullExprArg Cond, 2103 Decl *CondVar, Stmt *Body); 2104 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2105 SourceLocation WhileLoc, 2106 SourceLocation CondLParen, Expr *Cond, 2107 SourceLocation CondRParen); 2108 2109 StmtResult ActOnForStmt(SourceLocation ForLoc, 2110 SourceLocation LParenLoc, 2111 Stmt *First, FullExprArg Second, 2112 Decl *SecondVar, 2113 FullExprArg Third, 2114 SourceLocation RParenLoc, 2115 Stmt *Body); 2116 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc, 2117 Expr *collection); 2118 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2119 SourceLocation LParenLoc, 2120 Stmt *First, Expr *Second, 2121 SourceLocation RParenLoc, Stmt *Body); 2122 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2123 SourceLocation LParenLoc, Stmt *LoopVar, 2124 SourceLocation ColonLoc, Expr *Collection, 2125 SourceLocation RParenLoc); 2126 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2127 SourceLocation ColonLoc, 2128 Stmt *RangeDecl, Stmt *BeginEndDecl, 2129 Expr *Cond, Expr *Inc, 2130 Stmt *LoopVarDecl, 2131 SourceLocation RParenLoc); 2132 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2133 2134 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2135 SourceLocation LabelLoc, 2136 LabelDecl *TheDecl); 2137 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2138 SourceLocation StarLoc, 2139 Expr *DestExp); 2140 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2141 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2142 2143 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2144 bool AllowFunctionParameters); 2145 2146 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2147 StmtResult ActOnCapScopeReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2148 2149 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2150 bool IsSimple, bool IsVolatile, 2151 unsigned NumOutputs, unsigned NumInputs, 2152 IdentifierInfo **Names, 2153 MultiExprArg Constraints, 2154 MultiExprArg Exprs, 2155 Expr *AsmString, 2156 MultiExprArg Clobbers, 2157 SourceLocation RParenLoc, 2158 bool MSAsm = false); 2159 2160 2161 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2162 SourceLocation StartLoc, 2163 SourceLocation IdLoc, IdentifierInfo *Id, 2164 bool Invalid = false); 2165 2166 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2167 2168 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2169 Decl *Parm, Stmt *Body); 2170 2171 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2172 2173 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2174 MultiStmtArg Catch, Stmt *Finally); 2175 2176 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2177 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2178 Scope *CurScope); 2179 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, 2180 Expr *operand); 2181 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2182 Expr *SynchExpr, 2183 Stmt *SynchBody); 2184 2185 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2186 2187 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2188 SourceLocation StartLoc, 2189 SourceLocation IdLoc, 2190 IdentifierInfo *Id); 2191 2192 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2193 2194 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2195 Decl *ExDecl, Stmt *HandlerBlock); 2196 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2197 MultiStmtArg Handlers); 2198 2199 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2200 SourceLocation TryLoc, 2201 Stmt *TryBlock, 2202 Stmt *Handler); 2203 2204 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2205 Expr *FilterExpr, 2206 Stmt *Block); 2207 2208 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2209 Stmt *Block); 2210 2211 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2212 2213 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2214 2215 /// \brief If it's a file scoped decl that must warn if not used, keep track 2216 /// of it. 2217 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2218 2219 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2220 /// whose result is unused, warn. 2221 void DiagnoseUnusedExprResult(const Stmt *S); 2222 void DiagnoseUnusedDecl(const NamedDecl *ND); 2223 2224 ParsingDeclState PushParsingDeclaration() { 2225 return DelayedDiagnostics.pushParsingDecl(); 2226 } 2227 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2228 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2229 } 2230 2231 typedef ProcessingContextState ParsingClassState; 2232 ParsingClassState PushParsingClass() { 2233 return DelayedDiagnostics.pushContext(); 2234 } 2235 void PopParsingClass(ParsingClassState state) { 2236 DelayedDiagnostics.popContext(state); 2237 } 2238 2239 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2240 SourceLocation Loc, 2241 const ObjCInterfaceDecl *UnknownObjCClass=0); 2242 2243 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2244 2245 bool makeUnavailableInSystemHeader(SourceLocation loc, 2246 StringRef message); 2247 2248 //===--------------------------------------------------------------------===// 2249 // Expression Parsing Callbacks: SemaExpr.cpp. 2250 2251 bool CanUseDecl(NamedDecl *D); 2252 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2253 const ObjCInterfaceDecl *UnknownObjCClass=0); 2254 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2255 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2256 ObjCMethodDecl *Getter, 2257 SourceLocation Loc); 2258 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2259 Expr **Args, unsigned NumArgs); 2260 2261 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 2262 2263 void PopExpressionEvaluationContext(); 2264 2265 void DiscardCleanupsInEvaluationContext(); 2266 2267 ExprResult TranformToPotentiallyEvaluated(Expr *E); 2268 ExprResult HandleExprEvaluationContextForTypeof(Expr *E); 2269 2270 // Functions for marking a declaration referenced. These functions also 2271 // contain the relevant logic for marking if a reference to a function or 2272 // variable is an odr-use (in the C++11 sense). There are separate variants 2273 // for expressions referring to a decl; these exist because odr-use marking 2274 // needs to be delayed for some constant variables when we build one of the 2275 // named expressions. 2276 void MarkAnyDeclReferenced(SourceLocation Loc, Decl *D); 2277 void MarkFunctionReferenced(SourceLocation Loc, FunctionDecl *Func); 2278 void MarkVariableReferenced(SourceLocation Loc, VarDecl *Var); 2279 void MarkBlockDeclRefReferenced(BlockDeclRefExpr *E); 2280 void MarkDeclRefReferenced(DeclRefExpr *E); 2281 void MarkMemberReferenced(MemberExpr *E); 2282 2283 void UpdateMarkingForLValueToRValue(Expr *E); 2284 void CleanupVarDeclMarking(); 2285 2286 enum TryCaptureKind { 2287 TryCapture_Implicit, TryCapture_ExplicitByVal, TryCapture_ExplicitByRef 2288 }; 2289 void TryCaptureVar(VarDecl *var, SourceLocation loc, 2290 TryCaptureKind Kind = TryCapture_Implicit); 2291 2292 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2293 void MarkDeclarationsReferencedInExpr(Expr *E); 2294 2295 /// \brief Try to recover by turning the given expression into a 2296 /// call. Returns true if recovery was attempted or an error was 2297 /// emitted; this may also leave the ExprResult invalid. 2298 bool tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD, 2299 bool ForceComplain = false, 2300 bool (*IsPlausibleResult)(QualType) = 0); 2301 2302 /// \brief Figure out if an expression could be turned into a call. 2303 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2304 UnresolvedSetImpl &NonTemplateOverloads); 2305 2306 /// \brief Conditionally issue a diagnostic based on the current 2307 /// evaluation context. 2308 /// 2309 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2310 /// the function body is parsed, and then do a basic reachability analysis to 2311 /// determine if the statement is reachable. If it is unreachable, the 2312 /// diagnostic will not be emitted. 2313 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement, 2314 const PartialDiagnostic &PD); 2315 2316 // Primary Expressions. 2317 SourceRange getExprRange(Expr *E) const; 2318 2319 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, 2320 SourceLocation TemplateKWLoc, 2321 UnqualifiedId &Id, 2322 bool HasTrailingLParen, bool IsAddressOfOperand, 2323 CorrectionCandidateCallback *CCC = 0); 2324 2325 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2326 TemplateArgumentListInfo &Buffer, 2327 DeclarationNameInfo &NameInfo, 2328 const TemplateArgumentListInfo *&TemplateArgs); 2329 2330 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2331 CorrectionCandidateCallback &CCC, 2332 TemplateArgumentListInfo *ExplicitTemplateArgs = 0, 2333 Expr **Args = 0, unsigned NumArgs = 0); 2334 2335 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S, 2336 IdentifierInfo *II, 2337 bool AllowBuiltinCreation=false); 2338 2339 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2340 SourceLocation TemplateKWLoc, 2341 const DeclarationNameInfo &NameInfo, 2342 bool isAddressOfOperand, 2343 const TemplateArgumentListInfo *TemplateArgs); 2344 2345 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2346 ExprValueKind VK, 2347 SourceLocation Loc, 2348 const CXXScopeSpec *SS = 0); 2349 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2350 ExprValueKind VK, 2351 const DeclarationNameInfo &NameInfo, 2352 const CXXScopeSpec *SS = 0); 2353 ExprResult 2354 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2355 SourceLocation nameLoc, 2356 IndirectFieldDecl *indirectField, 2357 Expr *baseObjectExpr = 0, 2358 SourceLocation opLoc = SourceLocation()); 2359 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2360 SourceLocation TemplateKWLoc, 2361 LookupResult &R, 2362 const TemplateArgumentListInfo *TemplateArgs); 2363 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2364 SourceLocation TemplateKWLoc, 2365 LookupResult &R, 2366 const TemplateArgumentListInfo *TemplateArgs, 2367 bool IsDefiniteInstance); 2368 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2369 const LookupResult &R, 2370 bool HasTrailingLParen); 2371 2372 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2373 const DeclarationNameInfo &NameInfo); 2374 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2375 SourceLocation TemplateKWLoc, 2376 const DeclarationNameInfo &NameInfo, 2377 const TemplateArgumentListInfo *TemplateArgs); 2378 2379 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2380 LookupResult &R, 2381 bool NeedsADL); 2382 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2383 const DeclarationNameInfo &NameInfo, 2384 NamedDecl *D); 2385 2386 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2387 ExprResult ActOnNumericConstant(const Token &Tok); 2388 ExprResult ActOnCharacterConstant(const Token &Tok); 2389 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E); 2390 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2391 SourceLocation R, 2392 MultiExprArg Val); 2393 2394 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2395 /// fragments (e.g. "foo" "bar" L"baz"). 2396 ExprResult ActOnStringLiteral(const Token *StringToks, 2397 unsigned NumStringToks); 2398 2399 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2400 SourceLocation DefaultLoc, 2401 SourceLocation RParenLoc, 2402 Expr *ControllingExpr, 2403 MultiTypeArg ArgTypes, 2404 MultiExprArg ArgExprs); 2405 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2406 SourceLocation DefaultLoc, 2407 SourceLocation RParenLoc, 2408 Expr *ControllingExpr, 2409 TypeSourceInfo **Types, 2410 Expr **Exprs, 2411 unsigned NumAssocs); 2412 2413 // Binary/Unary Operators. 'Tok' is the token for the operator. 2414 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2415 Expr *InputExpr); 2416 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2417 UnaryOperatorKind Opc, Expr *Input); 2418 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2419 tok::TokenKind Op, Expr *Input); 2420 2421 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo, 2422 SourceLocation OpLoc, 2423 UnaryExprOrTypeTrait ExprKind, 2424 SourceRange R); 2425 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2426 UnaryExprOrTypeTrait ExprKind); 2427 ExprResult 2428 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2429 UnaryExprOrTypeTrait ExprKind, 2430 bool IsType, void *TyOrEx, 2431 const SourceRange &ArgRange); 2432 2433 ExprResult CheckPlaceholderExpr(Expr *E); 2434 bool CheckVecStepExpr(Expr *E); 2435 2436 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2437 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc, 2438 SourceRange ExprRange, 2439 UnaryExprOrTypeTrait ExprKind); 2440 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2441 SourceLocation OpLoc, 2442 IdentifierInfo &Name, 2443 SourceLocation NameLoc, 2444 SourceLocation RParenLoc); 2445 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2446 tok::TokenKind Kind, Expr *Input); 2447 2448 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2449 Expr *Idx, SourceLocation RLoc); 2450 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2451 Expr *Idx, SourceLocation RLoc); 2452 2453 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2454 SourceLocation OpLoc, bool IsArrow, 2455 CXXScopeSpec &SS, 2456 SourceLocation TemplateKWLoc, 2457 NamedDecl *FirstQualifierInScope, 2458 const DeclarationNameInfo &NameInfo, 2459 const TemplateArgumentListInfo *TemplateArgs); 2460 2461 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2462 SourceLocation OpLoc, bool IsArrow, 2463 const CXXScopeSpec &SS, 2464 SourceLocation TemplateKWLoc, 2465 NamedDecl *FirstQualifierInScope, 2466 LookupResult &R, 2467 const TemplateArgumentListInfo *TemplateArgs, 2468 bool SuppressQualifierCheck = false); 2469 2470 ExprResult PerformMemberExprBaseConversion(Expr *Base, bool IsArrow); 2471 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2472 bool &IsArrow, SourceLocation OpLoc, 2473 CXXScopeSpec &SS, 2474 Decl *ObjCImpDecl, 2475 bool HasTemplateArgs); 2476 2477 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2478 const CXXScopeSpec &SS, 2479 const LookupResult &R); 2480 2481 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2482 bool IsArrow, SourceLocation OpLoc, 2483 const CXXScopeSpec &SS, 2484 SourceLocation TemplateKWLoc, 2485 NamedDecl *FirstQualifierInScope, 2486 const DeclarationNameInfo &NameInfo, 2487 const TemplateArgumentListInfo *TemplateArgs); 2488 2489 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2490 SourceLocation OpLoc, 2491 tok::TokenKind OpKind, 2492 CXXScopeSpec &SS, 2493 SourceLocation TemplateKWLoc, 2494 UnqualifiedId &Member, 2495 Decl *ObjCImpDecl, 2496 bool HasTrailingLParen); 2497 2498 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2499 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2500 FunctionDecl *FDecl, 2501 const FunctionProtoType *Proto, 2502 Expr **Args, unsigned NumArgs, 2503 SourceLocation RParenLoc, 2504 bool ExecConfig = false); 2505 void CheckStaticArrayArgument(SourceLocation CallLoc, 2506 ParmVarDecl *Param, 2507 const Expr *ArgExpr); 2508 2509 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2510 /// This provides the location of the left/right parens and a list of comma 2511 /// locations. 2512 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2513 MultiExprArg ArgExprs, SourceLocation RParenLoc, 2514 Expr *ExecConfig = 0, bool IsExecConfig = false); 2515 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2516 SourceLocation LParenLoc, 2517 Expr **Args, unsigned NumArgs, 2518 SourceLocation RParenLoc, 2519 Expr *Config = 0, 2520 bool IsExecConfig = false); 2521 2522 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2523 MultiExprArg ExecConfig, 2524 SourceLocation GGGLoc); 2525 2526 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2527 Declarator &D, ParsedType &Ty, 2528 SourceLocation RParenLoc, Expr *CastExpr); 2529 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2530 TypeSourceInfo *Ty, 2531 SourceLocation RParenLoc, 2532 Expr *Op); 2533 CastKind PrepareScalarCast(ExprResult &src, QualType destType); 2534 2535 /// \brief Build an altivec or OpenCL literal. 2536 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2537 SourceLocation RParenLoc, Expr *E, 2538 TypeSourceInfo *TInfo); 2539 2540 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2541 2542 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2543 ParsedType Ty, 2544 SourceLocation RParenLoc, 2545 Expr *InitExpr); 2546 2547 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2548 TypeSourceInfo *TInfo, 2549 SourceLocation RParenLoc, 2550 Expr *LiteralExpr); 2551 2552 ExprResult ActOnInitList(SourceLocation LBraceLoc, 2553 MultiExprArg InitArgList, 2554 SourceLocation RBraceLoc); 2555 2556 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2557 SourceLocation Loc, 2558 bool GNUSyntax, 2559 ExprResult Init); 2560 2561 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2562 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr); 2563 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2564 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr); 2565 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc, 2566 Expr *LHSExpr, Expr *RHSExpr); 2567 2568 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2569 /// in the case of a the GNU conditional expr extension. 2570 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2571 SourceLocation ColonLoc, 2572 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr); 2573 2574 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2575 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2576 LabelDecl *TheDecl); 2577 2578 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2579 SourceLocation RPLoc); // "({..})" 2580 2581 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2582 struct OffsetOfComponent { 2583 SourceLocation LocStart, LocEnd; 2584 bool isBrackets; // true if [expr], false if .ident 2585 union { 2586 IdentifierInfo *IdentInfo; 2587 Expr *E; 2588 } U; 2589 }; 2590 2591 /// __builtin_offsetof(type, a.b[123][456].c) 2592 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2593 TypeSourceInfo *TInfo, 2594 OffsetOfComponent *CompPtr, 2595 unsigned NumComponents, 2596 SourceLocation RParenLoc); 2597 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2598 SourceLocation BuiltinLoc, 2599 SourceLocation TypeLoc, 2600 ParsedType ParsedArgTy, 2601 OffsetOfComponent *CompPtr, 2602 unsigned NumComponents, 2603 SourceLocation RParenLoc); 2604 2605 // __builtin_choose_expr(constExpr, expr1, expr2) 2606 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2607 Expr *CondExpr, Expr *LHSExpr, 2608 Expr *RHSExpr, SourceLocation RPLoc); 2609 2610 // __builtin_va_arg(expr, type) 2611 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, 2612 SourceLocation RPLoc); 2613 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E, 2614 TypeSourceInfo *TInfo, SourceLocation RPLoc); 2615 2616 // __null 2617 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2618 2619 bool CheckCaseExpression(Expr *E); 2620 2621 /// \brief Describes the result of an "if-exists" condition check. 2622 enum IfExistsResult { 2623 /// \brief The symbol exists. 2624 IER_Exists, 2625 2626 /// \brief The symbol does not exist. 2627 IER_DoesNotExist, 2628 2629 /// \brief The name is a dependent name, so the results will differ 2630 /// from one instantiation to the next. 2631 IER_Dependent, 2632 2633 /// \brief An error occurred. 2634 IER_Error 2635 }; 2636 2637 IfExistsResult 2638 CheckMicrosoftIfExistsSymbol(Scope *S, CXXScopeSpec &SS, 2639 const DeclarationNameInfo &TargetNameInfo); 2640 2641 IfExistsResult 2642 CheckMicrosoftIfExistsSymbol(Scope *S, SourceLocation KeywordLoc, 2643 bool IsIfExists, CXXScopeSpec &SS, 2644 UnqualifiedId &Name); 2645 2646 StmtResult BuildMSDependentExistsStmt(SourceLocation KeywordLoc, 2647 bool IsIfExists, 2648 NestedNameSpecifierLoc QualifierLoc, 2649 DeclarationNameInfo NameInfo, 2650 Stmt *Nested); 2651 StmtResult ActOnMSDependentExistsStmt(SourceLocation KeywordLoc, 2652 bool IsIfExists, 2653 CXXScopeSpec &SS, UnqualifiedId &Name, 2654 Stmt *Nested); 2655 2656 //===------------------------- "Block" Extension ------------------------===// 2657 2658 /// ActOnBlockStart - This callback is invoked when a block literal is 2659 /// started. 2660 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2661 2662 /// ActOnBlockArguments - This callback allows processing of block arguments. 2663 /// If there are no arguments, this is still invoked. 2664 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2665 2666 /// ActOnBlockError - If there is an error parsing a block, this callback 2667 /// is invoked to pop the information about the block from the action impl. 2668 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2669 2670 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2671 /// literal was successfully completed. ^(int x){...} 2672 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body, 2673 Scope *CurScope); 2674 2675 //===---------------------------- OpenCL Features -----------------------===// 2676 2677 /// __builtin_astype(...) 2678 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, 2679 SourceLocation BuiltinLoc, 2680 SourceLocation RParenLoc); 2681 2682 //===---------------------------- C++ Features --------------------------===// 2683 2684 // Act on C++ namespaces 2685 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2686 SourceLocation NamespaceLoc, 2687 SourceLocation IdentLoc, 2688 IdentifierInfo *Ident, 2689 SourceLocation LBrace, 2690 AttributeList *AttrList); 2691 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2692 2693 NamespaceDecl *getStdNamespace() const; 2694 NamespaceDecl *getOrCreateStdNamespace(); 2695 2696 CXXRecordDecl *getStdBadAlloc() const; 2697 2698 /// \brief Tests whether Ty is an instance of std::initializer_list and, if 2699 /// it is and Element is not NULL, assigns the element type to Element. 2700 bool isStdInitializerList(QualType Ty, QualType *Element); 2701 2702 /// \brief Looks for the std::initializer_list template and instantiates it 2703 /// with Element, or emits an error if it's not found. 2704 /// 2705 /// \returns The instantiated template, or null on error. 2706 QualType BuildStdInitializerList(QualType Element, SourceLocation Loc); 2707 2708 /// \brief Determine whether Ctor is an initializer-list constructor, as 2709 /// defined in [dcl.init.list]p2. 2710 bool isInitListConstructor(const CXXConstructorDecl *Ctor); 2711 2712 Decl *ActOnUsingDirective(Scope *CurScope, 2713 SourceLocation UsingLoc, 2714 SourceLocation NamespcLoc, 2715 CXXScopeSpec &SS, 2716 SourceLocation IdentLoc, 2717 IdentifierInfo *NamespcName, 2718 AttributeList *AttrList); 2719 2720 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2721 2722 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2723 SourceLocation NamespaceLoc, 2724 SourceLocation AliasLoc, 2725 IdentifierInfo *Alias, 2726 CXXScopeSpec &SS, 2727 SourceLocation IdentLoc, 2728 IdentifierInfo *Ident); 2729 2730 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2731 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2732 const LookupResult &PreviousDecls); 2733 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2734 NamedDecl *Target); 2735 2736 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2737 bool isTypeName, 2738 const CXXScopeSpec &SS, 2739 SourceLocation NameLoc, 2740 const LookupResult &Previous); 2741 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2742 const CXXScopeSpec &SS, 2743 SourceLocation NameLoc); 2744 2745 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2746 SourceLocation UsingLoc, 2747 CXXScopeSpec &SS, 2748 const DeclarationNameInfo &NameInfo, 2749 AttributeList *AttrList, 2750 bool IsInstantiation, 2751 bool IsTypeName, 2752 SourceLocation TypenameLoc); 2753 2754 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2755 2756 Decl *ActOnUsingDeclaration(Scope *CurScope, 2757 AccessSpecifier AS, 2758 bool HasUsingKeyword, 2759 SourceLocation UsingLoc, 2760 CXXScopeSpec &SS, 2761 UnqualifiedId &Name, 2762 AttributeList *AttrList, 2763 bool IsTypeName, 2764 SourceLocation TypenameLoc); 2765 Decl *ActOnAliasDeclaration(Scope *CurScope, 2766 AccessSpecifier AS, 2767 MultiTemplateParamsArg TemplateParams, 2768 SourceLocation UsingLoc, 2769 UnqualifiedId &Name, 2770 TypeResult Type); 2771 2772 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2773 /// ActOnDeclarator, when a C++ direct initializer is present. 2774 /// e.g: "int x(1);" 2775 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2776 SourceLocation LParenLoc, 2777 MultiExprArg Exprs, 2778 SourceLocation RParenLoc, 2779 bool TypeMayContainAuto); 2780 2781 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2782 /// and sets it as the initializer for the the passed in VarDecl. 2783 bool InitializeVarWithConstructor(VarDecl *VD, 2784 CXXConstructorDecl *Constructor, 2785 MultiExprArg Exprs, 2786 bool HadMultipleCandidates); 2787 2788 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2789 /// including handling of its default argument expressions. 2790 /// 2791 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2792 ExprResult 2793 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2794 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2795 bool HadMultipleCandidates, bool RequiresZeroInit, 2796 unsigned ConstructKind, SourceRange ParenRange); 2797 2798 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2799 // the constructor can be elidable? 2800 ExprResult 2801 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2802 CXXConstructorDecl *Constructor, bool Elidable, 2803 MultiExprArg Exprs, bool HadMultipleCandidates, 2804 bool RequiresZeroInit, unsigned ConstructKind, 2805 SourceRange ParenRange); 2806 2807 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2808 /// the default expr if needed. 2809 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2810 FunctionDecl *FD, 2811 ParmVarDecl *Param); 2812 2813 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2814 /// constructed variable. 2815 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2816 2817 /// \brief Helper class that collects exception specifications for 2818 /// implicitly-declared special member functions. 2819 class ImplicitExceptionSpecification { 2820 // Pointer to allow copying 2821 ASTContext *Context; 2822 // We order exception specifications thus: 2823 // noexcept is the most restrictive, but is only used in C++0x. 2824 // throw() comes next. 2825 // Then a throw(collected exceptions) 2826 // Finally no specification. 2827 // throw(...) is used instead if any called function uses it. 2828 // 2829 // If this exception specification cannot be known yet (for instance, 2830 // because this is the exception specification for a defaulted default 2831 // constructor and we haven't finished parsing the deferred parts of the 2832 // class yet), the C++0x standard does not specify how to behave. We 2833 // record this as an 'unknown' exception specification, which overrules 2834 // any other specification (even 'none', to keep this rule simple). 2835 ExceptionSpecificationType ComputedEST; 2836 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2837 SmallVector<QualType, 4> Exceptions; 2838 2839 void ClearExceptions() { 2840 ExceptionsSeen.clear(); 2841 Exceptions.clear(); 2842 } 2843 2844 public: 2845 explicit ImplicitExceptionSpecification(ASTContext &Context) 2846 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2847 if (!Context.getLangOptions().CPlusPlus0x) 2848 ComputedEST = EST_DynamicNone; 2849 } 2850 2851 /// \brief Get the computed exception specification type. 2852 ExceptionSpecificationType getExceptionSpecType() const { 2853 assert(ComputedEST != EST_ComputedNoexcept && 2854 "noexcept(expr) should not be a possible result"); 2855 return ComputedEST; 2856 } 2857 2858 /// \brief The number of exceptions in the exception specification. 2859 unsigned size() const { return Exceptions.size(); } 2860 2861 /// \brief The set of exceptions in the exception specification. 2862 const QualType *data() const { return Exceptions.data(); } 2863 2864 /// \brief Integrate another called method into the collected data. 2865 void CalledDecl(CXXMethodDecl *Method); 2866 2867 /// \brief Integrate an invoked expression into the collected data. 2868 void CalledExpr(Expr *E); 2869 2870 /// \brief Specify that the exception specification can't be detemined yet. 2871 void SetDelayed() { 2872 ClearExceptions(); 2873 ComputedEST = EST_Delayed; 2874 } 2875 2876 FunctionProtoType::ExtProtoInfo getEPI() const { 2877 FunctionProtoType::ExtProtoInfo EPI; 2878 EPI.ExceptionSpecType = getExceptionSpecType(); 2879 EPI.NumExceptions = size(); 2880 EPI.Exceptions = data(); 2881 return EPI; 2882 } 2883 }; 2884 2885 /// \brief Determine what sort of exception specification a defaulted 2886 /// copy constructor of a class will have. 2887 ImplicitExceptionSpecification 2888 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2889 2890 /// \brief Determine what sort of exception specification a defaulted 2891 /// default constructor of a class will have, and whether the parameter 2892 /// will be const. 2893 std::pair<ImplicitExceptionSpecification, bool> 2894 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2895 2896 /// \brief Determine what sort of exception specification a defautled 2897 /// copy assignment operator of a class will have, and whether the 2898 /// parameter will be const. 2899 std::pair<ImplicitExceptionSpecification, bool> 2900 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2901 2902 /// \brief Determine what sort of exception specification a defaulted move 2903 /// constructor of a class will have. 2904 ImplicitExceptionSpecification 2905 ComputeDefaultedMoveCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2906 2907 /// \brief Determine what sort of exception specification a defaulted move 2908 /// assignment operator of a class will have. 2909 ImplicitExceptionSpecification 2910 ComputeDefaultedMoveAssignmentExceptionSpec(CXXRecordDecl *ClassDecl); 2911 2912 /// \brief Determine what sort of exception specification a defaulted 2913 /// destructor of a class will have. 2914 ImplicitExceptionSpecification 2915 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 2916 2917 /// \brief Determine if a special member function should have a deleted 2918 /// definition when it is defaulted. 2919 bool ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM); 2920 2921 /// \brief Determine if a defaulted copy assignment operator ought to be 2922 /// deleted. 2923 bool ShouldDeleteCopyAssignmentOperator(CXXMethodDecl *MD); 2924 2925 /// \brief Determine if a defaulted move assignment operator ought to be 2926 /// deleted. 2927 bool ShouldDeleteMoveAssignmentOperator(CXXMethodDecl *MD); 2928 2929 /// \brief Determine if a defaulted destructor ought to be deleted. 2930 bool ShouldDeleteDestructor(CXXDestructorDecl *DD); 2931 2932 /// \brief Declare the implicit default constructor for the given class. 2933 /// 2934 /// \param ClassDecl The class declaration into which the implicit 2935 /// default constructor will be added. 2936 /// 2937 /// \returns The implicitly-declared default constructor. 2938 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2939 CXXRecordDecl *ClassDecl); 2940 2941 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2942 /// defining this constructor as the default constructor. 2943 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2944 CXXConstructorDecl *Constructor); 2945 2946 /// \brief Declare the implicit destructor for the given class. 2947 /// 2948 /// \param ClassDecl The class declaration into which the implicit 2949 /// destructor will be added. 2950 /// 2951 /// \returns The implicitly-declared destructor. 2952 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2953 2954 /// DefineImplicitDestructor - Checks for feasibility of 2955 /// defining this destructor as the default destructor. 2956 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2957 CXXDestructorDecl *Destructor); 2958 2959 /// \brief Build an exception spec for destructors that don't have one. 2960 /// 2961 /// C++11 says that user-defined destructors with no exception spec get one 2962 /// that looks as if the destructor was implicitly declared. 2963 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 2964 CXXDestructorDecl *Destructor); 2965 2966 /// \brief Declare all inherited constructors for the given class. 2967 /// 2968 /// \param ClassDecl The class declaration into which the inherited 2969 /// constructors will be added. 2970 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2971 2972 /// \brief Declare the implicit copy constructor for the given class. 2973 /// 2974 /// \param ClassDecl The class declaration into which the implicit 2975 /// copy constructor will be added. 2976 /// 2977 /// \returns The implicitly-declared copy constructor. 2978 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2979 2980 /// DefineImplicitCopyConstructor - Checks for feasibility of 2981 /// defining this constructor as the copy constructor. 2982 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2983 CXXConstructorDecl *Constructor); 2984 2985 /// \brief Declare the implicit move constructor for the given class. 2986 /// 2987 /// \param ClassDecl The Class declaration into which the implicit 2988 /// move constructor will be added. 2989 /// 2990 /// \returns The implicitly-declared move constructor, or NULL if it wasn't 2991 /// declared. 2992 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl); 2993 2994 /// DefineImplicitMoveConstructor - Checks for feasibility of 2995 /// defining this constructor as the move constructor. 2996 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation, 2997 CXXConstructorDecl *Constructor); 2998 2999 /// \brief Declare the implicit copy assignment operator for the given class. 3000 /// 3001 /// \param ClassDecl The class declaration into which the implicit 3002 /// copy assignment operator will be added. 3003 /// 3004 /// \returns The implicitly-declared copy assignment operator. 3005 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 3006 3007 /// \brief Defines an implicitly-declared copy assignment operator. 3008 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 3009 CXXMethodDecl *MethodDecl); 3010 3011 /// \brief Declare the implicit move assignment operator for the given class. 3012 /// 3013 /// \param ClassDecl The Class declaration into which the implicit 3014 /// move assignment operator will be added. 3015 /// 3016 /// \returns The implicitly-declared move assignment operator, or NULL if it 3017 /// wasn't declared. 3018 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl); 3019 3020 /// \brief Defines an implicitly-declared move assignment operator. 3021 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation, 3022 CXXMethodDecl *MethodDecl); 3023 3024 /// \brief Force the declaration of any implicitly-declared members of this 3025 /// class. 3026 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 3027 3028 /// MaybeBindToTemporary - If the passed in expression has a record type with 3029 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 3030 /// it simply returns the passed in expression. 3031 ExprResult MaybeBindToTemporary(Expr *E); 3032 3033 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 3034 MultiExprArg ArgsPtr, 3035 SourceLocation Loc, 3036 ASTOwningVector<Expr*> &ConvertedArgs); 3037 3038 ParsedType getDestructorName(SourceLocation TildeLoc, 3039 IdentifierInfo &II, SourceLocation NameLoc, 3040 Scope *S, CXXScopeSpec &SS, 3041 ParsedType ObjectType, 3042 bool EnteringContext); 3043 3044 ParsedType getDestructorType(const DeclSpec& DS, ParsedType ObjectType); 3045 3046 // Checks that reinterpret casts don't have undefined behavior. 3047 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 3048 bool IsDereference, SourceRange Range); 3049 3050 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 3051 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 3052 tok::TokenKind Kind, 3053 SourceLocation LAngleBracketLoc, 3054 Declarator &D, 3055 SourceLocation RAngleBracketLoc, 3056 SourceLocation LParenLoc, 3057 Expr *E, 3058 SourceLocation RParenLoc); 3059 3060 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 3061 tok::TokenKind Kind, 3062 TypeSourceInfo *Ty, 3063 Expr *E, 3064 SourceRange AngleBrackets, 3065 SourceRange Parens); 3066 3067 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3068 SourceLocation TypeidLoc, 3069 TypeSourceInfo *Operand, 3070 SourceLocation RParenLoc); 3071 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3072 SourceLocation TypeidLoc, 3073 Expr *Operand, 3074 SourceLocation RParenLoc); 3075 3076 /// ActOnCXXTypeid - Parse typeid( something ). 3077 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 3078 SourceLocation LParenLoc, bool isType, 3079 void *TyOrExpr, 3080 SourceLocation RParenLoc); 3081 3082 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3083 SourceLocation TypeidLoc, 3084 TypeSourceInfo *Operand, 3085 SourceLocation RParenLoc); 3086 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3087 SourceLocation TypeidLoc, 3088 Expr *Operand, 3089 SourceLocation RParenLoc); 3090 3091 /// ActOnCXXUuidof - Parse __uuidof( something ). 3092 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 3093 SourceLocation LParenLoc, bool isType, 3094 void *TyOrExpr, 3095 SourceLocation RParenLoc); 3096 3097 3098 //// ActOnCXXThis - Parse 'this' pointer. 3099 ExprResult ActOnCXXThis(SourceLocation loc); 3100 3101 /// \brief Try to retrieve the type of the 'this' pointer. 3102 /// 3103 /// \param Capture If true, capture 'this' in this context. 3104 /// 3105 /// \returns The type of 'this', if possible. Otherwise, returns a NULL type. 3106 QualType getCurrentThisType(); 3107 3108 /// \brief Make sure the value of 'this' is actually available in the current 3109 /// context, if it is a potentially evaluated context. 3110 /// 3111 /// \param Loc The location at which the capture of 'this' occurs. 3112 /// 3113 /// \param Explicit Whether 'this' is explicitly captured in a lambda 3114 /// capture list. 3115 void CheckCXXThisCapture(SourceLocation Loc, bool Explicit = false); 3116 3117 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 3118 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 3119 3120 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 3121 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 3122 3123 //// ActOnCXXThrow - Parse throw expressions. 3124 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 3125 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 3126 bool IsThrownVarInScope); 3127 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 3128 bool IsThrownVarInScope); 3129 3130 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 3131 /// Can be interpreted either as function-style casting ("int(x)") 3132 /// or class type construction ("ClassType(x,y,z)") 3133 /// or creation of a value-initialized type ("int()"). 3134 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 3135 SourceLocation LParenLoc, 3136 MultiExprArg Exprs, 3137 SourceLocation RParenLoc); 3138 3139 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 3140 SourceLocation LParenLoc, 3141 MultiExprArg Exprs, 3142 SourceLocation RParenLoc); 3143 3144 /// ActOnCXXNew - Parsed a C++ 'new' expression. 3145 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 3146 SourceLocation PlacementLParen, 3147 MultiExprArg PlacementArgs, 3148 SourceLocation PlacementRParen, 3149 SourceRange TypeIdParens, Declarator &D, 3150 SourceLocation ConstructorLParen, 3151 MultiExprArg ConstructorArgs, 3152 SourceLocation ConstructorRParen); 3153 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 3154 SourceLocation PlacementLParen, 3155 MultiExprArg PlacementArgs, 3156 SourceLocation PlacementRParen, 3157 SourceRange TypeIdParens, 3158 QualType AllocType, 3159 TypeSourceInfo *AllocTypeInfo, 3160 Expr *ArraySize, 3161 SourceLocation ConstructorLParen, 3162 MultiExprArg ConstructorArgs, 3163 SourceLocation ConstructorRParen, 3164 bool TypeMayContainAuto = true); 3165 3166 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 3167 SourceRange R); 3168 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 3169 bool UseGlobal, QualType AllocType, bool IsArray, 3170 Expr **PlaceArgs, unsigned NumPlaceArgs, 3171 FunctionDecl *&OperatorNew, 3172 FunctionDecl *&OperatorDelete); 3173 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 3174 DeclarationName Name, Expr** Args, 3175 unsigned NumArgs, DeclContext *Ctx, 3176 bool AllowMissing, FunctionDecl *&Operator, 3177 bool Diagnose = true); 3178 void DeclareGlobalNewDelete(); 3179 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 3180 QualType Argument, 3181 bool addMallocAttr = false); 3182 3183 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 3184 DeclarationName Name, FunctionDecl* &Operator, 3185 bool Diagnose = true); 3186 3187 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 3188 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 3189 bool UseGlobal, bool ArrayForm, 3190 Expr *Operand); 3191 3192 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 3193 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 3194 SourceLocation StmtLoc, 3195 bool ConvertToBoolean); 3196 3197 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 3198 Expr *Operand, SourceLocation RParen); 3199 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 3200 SourceLocation RParen); 3201 3202 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 3203 /// pseudo-functions. 3204 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 3205 SourceLocation KWLoc, 3206 ParsedType Ty, 3207 SourceLocation RParen); 3208 3209 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3210 SourceLocation KWLoc, 3211 TypeSourceInfo *T, 3212 SourceLocation RParen); 3213 3214 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3215 /// pseudo-functions. 3216 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3217 SourceLocation KWLoc, 3218 ParsedType LhsTy, 3219 ParsedType RhsTy, 3220 SourceLocation RParen); 3221 3222 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3223 SourceLocation KWLoc, 3224 TypeSourceInfo *LhsT, 3225 TypeSourceInfo *RhsT, 3226 SourceLocation RParen); 3227 3228 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3229 /// pseudo-functions. 3230 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3231 SourceLocation KWLoc, 3232 ParsedType LhsTy, 3233 Expr *DimExpr, 3234 SourceLocation RParen); 3235 3236 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3237 SourceLocation KWLoc, 3238 TypeSourceInfo *TSInfo, 3239 Expr *DimExpr, 3240 SourceLocation RParen); 3241 3242 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3243 /// pseudo-functions. 3244 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3245 SourceLocation KWLoc, 3246 Expr *Queried, 3247 SourceLocation RParen); 3248 3249 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3250 SourceLocation KWLoc, 3251 Expr *Queried, 3252 SourceLocation RParen); 3253 3254 ExprResult ActOnStartCXXMemberReference(Scope *S, 3255 Expr *Base, 3256 SourceLocation OpLoc, 3257 tok::TokenKind OpKind, 3258 ParsedType &ObjectType, 3259 bool &MayBePseudoDestructor); 3260 3261 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3262 3263 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3264 SourceLocation OpLoc, 3265 tok::TokenKind OpKind, 3266 const CXXScopeSpec &SS, 3267 TypeSourceInfo *ScopeType, 3268 SourceLocation CCLoc, 3269 SourceLocation TildeLoc, 3270 PseudoDestructorTypeStorage DestroyedType, 3271 bool HasTrailingLParen); 3272 3273 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3274 SourceLocation OpLoc, 3275 tok::TokenKind OpKind, 3276 CXXScopeSpec &SS, 3277 UnqualifiedId &FirstTypeName, 3278 SourceLocation CCLoc, 3279 SourceLocation TildeLoc, 3280 UnqualifiedId &SecondTypeName, 3281 bool HasTrailingLParen); 3282 3283 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3284 SourceLocation OpLoc, 3285 tok::TokenKind OpKind, 3286 SourceLocation TildeLoc, 3287 const DeclSpec& DS, 3288 bool HasTrailingLParen); 3289 3290 /// MaybeCreateExprWithCleanups - If the current full-expression 3291 /// requires any cleanups, surround it with a ExprWithCleanups node. 3292 /// Otherwise, just returns the passed-in expression. 3293 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3294 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3295 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3296 3297 ExprResult ActOnFinishFullExpr(Expr *Expr); 3298 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3299 3300 // Marks SS invalid if it represents an incomplete type. 3301 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3302 3303 DeclContext *computeDeclContext(QualType T); 3304 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3305 bool EnteringContext = false); 3306 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3307 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3308 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3309 3310 /// \brief The parser has parsed a global nested-name-specifier '::'. 3311 /// 3312 /// \param S The scope in which this nested-name-specifier occurs. 3313 /// 3314 /// \param CCLoc The location of the '::'. 3315 /// 3316 /// \param SS The nested-name-specifier, which will be updated in-place 3317 /// to reflect the parsed nested-name-specifier. 3318 /// 3319 /// \returns true if an error occurred, false otherwise. 3320 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3321 CXXScopeSpec &SS); 3322 3323 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3324 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3325 3326 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3327 SourceLocation IdLoc, 3328 IdentifierInfo &II, 3329 ParsedType ObjectType); 3330 3331 bool BuildCXXNestedNameSpecifier(Scope *S, 3332 IdentifierInfo &Identifier, 3333 SourceLocation IdentifierLoc, 3334 SourceLocation CCLoc, 3335 QualType ObjectType, 3336 bool EnteringContext, 3337 CXXScopeSpec &SS, 3338 NamedDecl *ScopeLookupResult, 3339 bool ErrorRecoveryLookup); 3340 3341 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3342 /// 3343 /// \param S The scope in which this nested-name-specifier occurs. 3344 /// 3345 /// \param Identifier The identifier preceding the '::'. 3346 /// 3347 /// \param IdentifierLoc The location of the identifier. 3348 /// 3349 /// \param CCLoc The location of the '::'. 3350 /// 3351 /// \param ObjectType The type of the object, if we're parsing 3352 /// nested-name-specifier in a member access expression. 3353 /// 3354 /// \param EnteringContext Whether we're entering the context nominated by 3355 /// this nested-name-specifier. 3356 /// 3357 /// \param SS The nested-name-specifier, which is both an input 3358 /// parameter (the nested-name-specifier before this type) and an 3359 /// output parameter (containing the full nested-name-specifier, 3360 /// including this new type). 3361 /// 3362 /// \returns true if an error occurred, false otherwise. 3363 bool ActOnCXXNestedNameSpecifier(Scope *S, 3364 IdentifierInfo &Identifier, 3365 SourceLocation IdentifierLoc, 3366 SourceLocation CCLoc, 3367 ParsedType ObjectType, 3368 bool EnteringContext, 3369 CXXScopeSpec &SS); 3370 3371 bool ActOnCXXNestedNameSpecifierDecltype(CXXScopeSpec &SS, 3372 const DeclSpec &DS, 3373 SourceLocation ColonColonLoc); 3374 3375 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3376 IdentifierInfo &Identifier, 3377 SourceLocation IdentifierLoc, 3378 SourceLocation ColonLoc, 3379 ParsedType ObjectType, 3380 bool EnteringContext); 3381 3382 /// \brief The parser has parsed a nested-name-specifier 3383 /// 'template[opt] template-name < template-args >::'. 3384 /// 3385 /// \param S The scope in which this nested-name-specifier occurs. 3386 /// 3387 /// \param SS The nested-name-specifier, which is both an input 3388 /// parameter (the nested-name-specifier before this type) and an 3389 /// output parameter (containing the full nested-name-specifier, 3390 /// including this new type). 3391 /// 3392 /// \param TemplateKWLoc the location of the 'template' keyword, if any. 3393 /// \param TemplateName The template name. 3394 /// \param TemplateNameLoc The location of the template name. 3395 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3396 /// \param TemplateArgs The template arguments. 3397 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3398 /// \param CCLoc The location of the '::'. 3399 /// 3400 /// \param EnteringContext Whether we're entering the context of the 3401 /// nested-name-specifier. 3402 /// 3403 /// 3404 /// \returns true if an error occurred, false otherwise. 3405 bool ActOnCXXNestedNameSpecifier(Scope *S, 3406 CXXScopeSpec &SS, 3407 SourceLocation TemplateKWLoc, 3408 TemplateTy Template, 3409 SourceLocation TemplateNameLoc, 3410 SourceLocation LAngleLoc, 3411 ASTTemplateArgsPtr TemplateArgs, 3412 SourceLocation RAngleLoc, 3413 SourceLocation CCLoc, 3414 bool EnteringContext); 3415 3416 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3417 /// that the parser can use later to reconstruct the given 3418 /// nested-name-specifier. 3419 /// 3420 /// \param SS A nested-name-specifier. 3421 /// 3422 /// \returns A pointer containing all of the information in the 3423 /// nested-name-specifier \p SS. 3424 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3425 3426 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3427 /// the nested-name-specifier structure. 3428 /// 3429 /// \param Annotation The annotation pointer, produced by 3430 /// \c SaveNestedNameSpecifierAnnotation(). 3431 /// 3432 /// \param AnnotationRange The source range corresponding to the annotation. 3433 /// 3434 /// \param SS The nested-name-specifier that will be updated with the contents 3435 /// of the annotation pointer. 3436 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3437 SourceRange AnnotationRange, 3438 CXXScopeSpec &SS); 3439 3440 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3441 3442 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3443 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3444 /// After this method is called, according to [C++ 3.4.3p3], names should be 3445 /// looked up in the declarator-id's scope, until the declarator is parsed and 3446 /// ActOnCXXExitDeclaratorScope is called. 3447 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3448 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3449 3450 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3451 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3452 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3453 /// Used to indicate that names should revert to being looked up in the 3454 /// defining scope. 3455 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3456 3457 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3458 /// initializer for the declaration 'Dcl'. 3459 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3460 /// static data member of class X, names should be looked up in the scope of 3461 /// class X. 3462 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3463 3464 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3465 /// initializer for the declaration 'Dcl'. 3466 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3467 3468 /// ActOnStartOfLambdaDefinition - This is called just before we start 3469 /// parsing the body of a lambda; it analyzes the explicit captures and 3470 /// arguments, and sets up various data-structures for the body of the 3471 /// lambda. 3472 void ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro, 3473 Declarator &ParamInfo, Scope *CurScope); 3474 3475 /// ActOnLambdaError - If there is an error parsing a lambda, this callback 3476 /// is invoked to pop the information about the lambda. 3477 void ActOnLambdaError(SourceLocation StartLoc, Scope *CurScope); 3478 3479 /// ActOnLambdaExpr - This is called when the body of a lambda expression 3480 /// was successfully completed. 3481 ExprResult ActOnLambdaExpr(SourceLocation StartLoc, Stmt *Body, 3482 Scope *CurScope); 3483 3484 // ParseObjCStringLiteral - Parse Objective-C string literals. 3485 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3486 Expr **Strings, 3487 unsigned NumStrings); 3488 3489 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3490 TypeSourceInfo *EncodedTypeInfo, 3491 SourceLocation RParenLoc); 3492 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3493 CXXMethodDecl *Method, 3494 bool HadMultipleCandidates); 3495 3496 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3497 SourceLocation EncodeLoc, 3498 SourceLocation LParenLoc, 3499 ParsedType Ty, 3500 SourceLocation RParenLoc); 3501 3502 // ParseObjCSelectorExpression - Build selector expression for @selector 3503 ExprResult ParseObjCSelectorExpression(Selector Sel, 3504 SourceLocation AtLoc, 3505 SourceLocation SelLoc, 3506 SourceLocation LParenLoc, 3507 SourceLocation RParenLoc); 3508 3509 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3510 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3511 SourceLocation AtLoc, 3512 SourceLocation ProtoLoc, 3513 SourceLocation LParenLoc, 3514 SourceLocation RParenLoc); 3515 3516 //===--------------------------------------------------------------------===// 3517 // C++ Declarations 3518 // 3519 Decl *ActOnStartLinkageSpecification(Scope *S, 3520 SourceLocation ExternLoc, 3521 SourceLocation LangLoc, 3522 StringRef Lang, 3523 SourceLocation LBraceLoc); 3524 Decl *ActOnFinishLinkageSpecification(Scope *S, 3525 Decl *LinkageSpec, 3526 SourceLocation RBraceLoc); 3527 3528 3529 //===--------------------------------------------------------------------===// 3530 // C++ Classes 3531 // 3532 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3533 const CXXScopeSpec *SS = 0); 3534 3535 bool ActOnAccessSpecifier(AccessSpecifier Access, 3536 SourceLocation ASLoc, 3537 SourceLocation ColonLoc, 3538 AttributeList *Attrs = 0); 3539 3540 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3541 Declarator &D, 3542 MultiTemplateParamsArg TemplateParameterLists, 3543 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3544 bool HasDeferredInit); 3545 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3546 Expr *Init); 3547 3548 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3549 Scope *S, 3550 CXXScopeSpec &SS, 3551 IdentifierInfo *MemberOrBase, 3552 ParsedType TemplateTypeTy, 3553 const DeclSpec &DS, 3554 SourceLocation IdLoc, 3555 SourceLocation LParenLoc, 3556 Expr **Args, unsigned NumArgs, 3557 SourceLocation RParenLoc, 3558 SourceLocation EllipsisLoc); 3559 3560 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3561 Scope *S, 3562 CXXScopeSpec &SS, 3563 IdentifierInfo *MemberOrBase, 3564 ParsedType TemplateTypeTy, 3565 const DeclSpec &DS, 3566 SourceLocation IdLoc, 3567 Expr *InitList, 3568 SourceLocation EllipsisLoc); 3569 3570 MemInitResult BuildMemInitializer(Decl *ConstructorD, 3571 Scope *S, 3572 CXXScopeSpec &SS, 3573 IdentifierInfo *MemberOrBase, 3574 ParsedType TemplateTypeTy, 3575 const DeclSpec &DS, 3576 SourceLocation IdLoc, 3577 const MultiInitializer &Init, 3578 SourceLocation EllipsisLoc); 3579 3580 MemInitResult BuildMemberInitializer(ValueDecl *Member, 3581 const MultiInitializer &Args, 3582 SourceLocation IdLoc); 3583 3584 MemInitResult BuildBaseInitializer(QualType BaseType, 3585 TypeSourceInfo *BaseTInfo, 3586 const MultiInitializer &Args, 3587 CXXRecordDecl *ClassDecl, 3588 SourceLocation EllipsisLoc); 3589 3590 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3591 const MultiInitializer &Args, 3592 CXXRecordDecl *ClassDecl); 3593 3594 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3595 CXXCtorInitializer *Initializer); 3596 3597 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3598 CXXCtorInitializer **Initializers, 3599 unsigned NumInitializers, bool AnyErrors); 3600 3601 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3602 3603 3604 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3605 /// mark all the non-trivial destructors of its members and bases as 3606 /// referenced. 3607 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3608 CXXRecordDecl *Record); 3609 3610 /// \brief The list of classes whose vtables have been used within 3611 /// this translation unit, and the source locations at which the 3612 /// first use occurred. 3613 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3614 3615 /// \brief The list of vtables that are required but have not yet been 3616 /// materialized. 3617 SmallVector<VTableUse, 16> VTableUses; 3618 3619 /// \brief The set of classes whose vtables have been used within 3620 /// this translation unit, and a bit that will be true if the vtable is 3621 /// required to be emitted (otherwise, it should be emitted only if needed 3622 /// by code generation). 3623 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3624 3625 /// \brief Load any externally-stored vtable uses. 3626 void LoadExternalVTableUses(); 3627 3628 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 3629 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 3630 DynamicClassesType; 3631 3632 /// \brief A list of all of the dynamic classes in this translation 3633 /// unit. 3634 DynamicClassesType DynamicClasses; 3635 3636 /// \brief Note that the vtable for the given class was used at the 3637 /// given location. 3638 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3639 bool DefinitionRequired = false); 3640 3641 /// MarkVirtualMembersReferenced - Will mark all members of the given 3642 /// CXXRecordDecl referenced. 3643 void MarkVirtualMembersReferenced(SourceLocation Loc, 3644 const CXXRecordDecl *RD); 3645 3646 /// \brief Define all of the vtables that have been used in this 3647 /// translation unit and reference any virtual members used by those 3648 /// vtables. 3649 /// 3650 /// \returns true if any work was done, false otherwise. 3651 bool DefineUsedVTables(); 3652 3653 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3654 3655 void ActOnMemInitializers(Decl *ConstructorDecl, 3656 SourceLocation ColonLoc, 3657 CXXCtorInitializer **MemInits, 3658 unsigned NumMemInits, 3659 bool AnyErrors); 3660 3661 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3662 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3663 Decl *TagDecl, 3664 SourceLocation LBrac, 3665 SourceLocation RBrac, 3666 AttributeList *AttrList); 3667 3668 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3669 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3670 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3671 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3672 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3673 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3674 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3675 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3676 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3677 bool IsInsideALocalClassWithinATemplateFunction(); 3678 3679 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3680 Expr *AssertExpr, 3681 Expr *AssertMessageExpr, 3682 SourceLocation RParenLoc); 3683 3684 FriendDecl *CheckFriendTypeDecl(SourceLocation Loc, 3685 SourceLocation FriendLoc, 3686 TypeSourceInfo *TSInfo); 3687 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3688 MultiTemplateParamsArg TemplateParams); 3689 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, 3690 MultiTemplateParamsArg TemplateParams); 3691 3692 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3693 StorageClass& SC); 3694 void CheckConstructor(CXXConstructorDecl *Constructor); 3695 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3696 StorageClass& SC); 3697 bool CheckDestructor(CXXDestructorDecl *Destructor); 3698 void CheckConversionDeclarator(Declarator &D, QualType &R, 3699 StorageClass& SC); 3700 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3701 3702 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3703 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3704 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3705 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3706 void CheckExplicitlyDefaultedMoveConstructor(CXXConstructorDecl *Ctor); 3707 void CheckExplicitlyDefaultedMoveAssignment(CXXMethodDecl *Method); 3708 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3709 3710 //===--------------------------------------------------------------------===// 3711 // C++ Derived Classes 3712 // 3713 3714 /// ActOnBaseSpecifier - Parsed a base specifier 3715 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3716 SourceRange SpecifierRange, 3717 bool Virtual, AccessSpecifier Access, 3718 TypeSourceInfo *TInfo, 3719 SourceLocation EllipsisLoc); 3720 3721 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3722 SourceRange SpecifierRange, 3723 bool Virtual, AccessSpecifier Access, 3724 ParsedType basetype, 3725 SourceLocation BaseLoc, 3726 SourceLocation EllipsisLoc); 3727 3728 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3729 unsigned NumBases); 3730 void ActOnBaseSpecifiers(Decl *ClassDecl, CXXBaseSpecifier **Bases, 3731 unsigned NumBases); 3732 3733 bool IsDerivedFrom(QualType Derived, QualType Base); 3734 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3735 3736 // FIXME: I don't like this name. 3737 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3738 3739 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3740 3741 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3742 SourceLocation Loc, SourceRange Range, 3743 CXXCastPath *BasePath = 0, 3744 bool IgnoreAccess = false); 3745 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3746 unsigned InaccessibleBaseID, 3747 unsigned AmbigiousBaseConvID, 3748 SourceLocation Loc, SourceRange Range, 3749 DeclarationName Name, 3750 CXXCastPath *BasePath); 3751 3752 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3753 3754 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3755 /// covariant, according to C++ [class.virtual]p5. 3756 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3757 const CXXMethodDecl *Old); 3758 3759 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3760 /// spec is a subset of base spec. 3761 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3762 const CXXMethodDecl *Old); 3763 3764 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3765 3766 /// CheckOverrideControl - Check C++0x override control semantics. 3767 void CheckOverrideControl(const Decl *D); 3768 3769 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3770 /// overrides a virtual member function marked 'final', according to 3771 /// C++0x [class.virtual]p3. 3772 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3773 const CXXMethodDecl *Old); 3774 3775 3776 //===--------------------------------------------------------------------===// 3777 // C++ Access Control 3778 // 3779 3780 enum AccessResult { 3781 AR_accessible, 3782 AR_inaccessible, 3783 AR_dependent, 3784 AR_delayed 3785 }; 3786 3787 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3788 NamedDecl *PrevMemberDecl, 3789 AccessSpecifier LexicalAS); 3790 3791 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3792 DeclAccessPair FoundDecl); 3793 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3794 DeclAccessPair FoundDecl); 3795 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3796 SourceRange PlacementRange, 3797 CXXRecordDecl *NamingClass, 3798 DeclAccessPair FoundDecl, 3799 bool Diagnose = true); 3800 AccessResult CheckConstructorAccess(SourceLocation Loc, 3801 CXXConstructorDecl *D, 3802 const InitializedEntity &Entity, 3803 AccessSpecifier Access, 3804 bool IsCopyBindingRefToTemp = false); 3805 AccessResult CheckConstructorAccess(SourceLocation Loc, 3806 CXXConstructorDecl *D, 3807 AccessSpecifier Access, 3808 PartialDiagnostic PD); 3809 AccessResult CheckDestructorAccess(SourceLocation Loc, 3810 CXXDestructorDecl *Dtor, 3811 const PartialDiagnostic &PDiag); 3812 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3813 NamedDecl *D, 3814 const PartialDiagnostic &PDiag); 3815 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3816 Expr *ObjectExpr, 3817 Expr *ArgExpr, 3818 DeclAccessPair FoundDecl); 3819 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3820 DeclAccessPair FoundDecl); 3821 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3822 QualType Base, QualType Derived, 3823 const CXXBasePath &Path, 3824 unsigned DiagID, 3825 bool ForceCheck = false, 3826 bool ForceUnprivileged = false); 3827 void CheckLookupAccess(const LookupResult &R); 3828 bool IsSimplyAccessible(NamedDecl *decl, DeclContext *Ctx); 3829 3830 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3831 const MultiLevelTemplateArgumentList &TemplateArgs); 3832 void PerformDependentDiagnostics(const DeclContext *Pattern, 3833 const MultiLevelTemplateArgumentList &TemplateArgs); 3834 3835 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3836 3837 /// A flag to suppress access checking. 3838 bool SuppressAccessChecking; 3839 3840 /// \brief When true, access checking violations are treated as SFINAE 3841 /// failures rather than hard errors. 3842 bool AccessCheckingSFINAE; 3843 3844 void ActOnStartSuppressingAccessChecks(); 3845 void ActOnStopSuppressingAccessChecks(); 3846 3847 enum AbstractDiagSelID { 3848 AbstractNone = -1, 3849 AbstractReturnType, 3850 AbstractParamType, 3851 AbstractVariableType, 3852 AbstractFieldType, 3853 AbstractArrayType 3854 }; 3855 3856 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3857 const PartialDiagnostic &PD); 3858 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3859 3860 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3861 AbstractDiagSelID SelID = AbstractNone); 3862 3863 //===--------------------------------------------------------------------===// 3864 // C++ Overloaded Operators [C++ 13.5] 3865 // 3866 3867 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3868 3869 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3870 3871 //===--------------------------------------------------------------------===// 3872 // C++ Templates [C++ 14] 3873 // 3874 void FilterAcceptableTemplateNames(LookupResult &R); 3875 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3876 3877 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3878 QualType ObjectType, bool EnteringContext, 3879 bool &MemberOfUnknownSpecialization); 3880 3881 TemplateNameKind isTemplateName(Scope *S, 3882 CXXScopeSpec &SS, 3883 bool hasTemplateKeyword, 3884 UnqualifiedId &Name, 3885 ParsedType ObjectType, 3886 bool EnteringContext, 3887 TemplateTy &Template, 3888 bool &MemberOfUnknownSpecialization); 3889 3890 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3891 SourceLocation IILoc, 3892 Scope *S, 3893 const CXXScopeSpec *SS, 3894 TemplateTy &SuggestedTemplate, 3895 TemplateNameKind &SuggestedKind); 3896 3897 void DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3898 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3899 3900 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3901 SourceLocation EllipsisLoc, 3902 SourceLocation KeyLoc, 3903 IdentifierInfo *ParamName, 3904 SourceLocation ParamNameLoc, 3905 unsigned Depth, unsigned Position, 3906 SourceLocation EqualLoc, 3907 ParsedType DefaultArg); 3908 3909 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3910 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3911 unsigned Depth, 3912 unsigned Position, 3913 SourceLocation EqualLoc, 3914 Expr *DefaultArg); 3915 Decl *ActOnTemplateTemplateParameter(Scope *S, 3916 SourceLocation TmpLoc, 3917 TemplateParameterList *Params, 3918 SourceLocation EllipsisLoc, 3919 IdentifierInfo *ParamName, 3920 SourceLocation ParamNameLoc, 3921 unsigned Depth, 3922 unsigned Position, 3923 SourceLocation EqualLoc, 3924 ParsedTemplateArgument DefaultArg); 3925 3926 TemplateParameterList * 3927 ActOnTemplateParameterList(unsigned Depth, 3928 SourceLocation ExportLoc, 3929 SourceLocation TemplateLoc, 3930 SourceLocation LAngleLoc, 3931 Decl **Params, unsigned NumParams, 3932 SourceLocation RAngleLoc); 3933 3934 /// \brief The context in which we are checking a template parameter 3935 /// list. 3936 enum TemplateParamListContext { 3937 TPC_ClassTemplate, 3938 TPC_FunctionTemplate, 3939 TPC_ClassTemplateMember, 3940 TPC_FriendFunctionTemplate, 3941 TPC_FriendFunctionTemplateDefinition, 3942 TPC_TypeAliasTemplate 3943 }; 3944 3945 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3946 TemplateParameterList *OldParams, 3947 TemplateParamListContext TPC); 3948 TemplateParameterList * 3949 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3950 SourceLocation DeclLoc, 3951 const CXXScopeSpec &SS, 3952 TemplateParameterList **ParamLists, 3953 unsigned NumParamLists, 3954 bool IsFriend, 3955 bool &IsExplicitSpecialization, 3956 bool &Invalid); 3957 3958 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3959 SourceLocation KWLoc, CXXScopeSpec &SS, 3960 IdentifierInfo *Name, SourceLocation NameLoc, 3961 AttributeList *Attr, 3962 TemplateParameterList *TemplateParams, 3963 AccessSpecifier AS, 3964 SourceLocation ModulePrivateLoc, 3965 unsigned NumOuterTemplateParamLists, 3966 TemplateParameterList **OuterTemplateParamLists); 3967 3968 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3969 TemplateArgumentListInfo &Out); 3970 3971 void NoteAllFoundTemplates(TemplateName Name); 3972 3973 QualType CheckTemplateIdType(TemplateName Template, 3974 SourceLocation TemplateLoc, 3975 TemplateArgumentListInfo &TemplateArgs); 3976 3977 TypeResult 3978 ActOnTemplateIdType(CXXScopeSpec &SS, SourceLocation TemplateKWLoc, 3979 TemplateTy Template, SourceLocation TemplateLoc, 3980 SourceLocation LAngleLoc, 3981 ASTTemplateArgsPtr TemplateArgs, 3982 SourceLocation RAngleLoc, 3983 bool IsCtorOrDtorName = false); 3984 3985 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3986 /// such as \c class T::template apply<U>. 3987 /// 3988 /// \param TUK 3989 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3990 TypeSpecifierType TagSpec, 3991 SourceLocation TagLoc, 3992 CXXScopeSpec &SS, 3993 SourceLocation TemplateKWLoc, 3994 TemplateTy TemplateD, 3995 SourceLocation TemplateLoc, 3996 SourceLocation LAngleLoc, 3997 ASTTemplateArgsPtr TemplateArgsIn, 3998 SourceLocation RAngleLoc); 3999 4000 4001 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 4002 SourceLocation TemplateKWLoc, 4003 LookupResult &R, 4004 bool RequiresADL, 4005 const TemplateArgumentListInfo *TemplateArgs); 4006 4007 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 4008 SourceLocation TemplateKWLoc, 4009 const DeclarationNameInfo &NameInfo, 4010 const TemplateArgumentListInfo *TemplateArgs); 4011 4012 TemplateNameKind ActOnDependentTemplateName(Scope *S, 4013 CXXScopeSpec &SS, 4014 SourceLocation TemplateKWLoc, 4015 UnqualifiedId &Name, 4016 ParsedType ObjectType, 4017 bool EnteringContext, 4018 TemplateTy &Template); 4019 4020 DeclResult 4021 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 4022 SourceLocation KWLoc, 4023 SourceLocation ModulePrivateLoc, 4024 CXXScopeSpec &SS, 4025 TemplateTy Template, 4026 SourceLocation TemplateNameLoc, 4027 SourceLocation LAngleLoc, 4028 ASTTemplateArgsPtr TemplateArgs, 4029 SourceLocation RAngleLoc, 4030 AttributeList *Attr, 4031 MultiTemplateParamsArg TemplateParameterLists); 4032 4033 Decl *ActOnTemplateDeclarator(Scope *S, 4034 MultiTemplateParamsArg TemplateParameterLists, 4035 Declarator &D); 4036 4037 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 4038 MultiTemplateParamsArg TemplateParameterLists, 4039 Declarator &D); 4040 4041 bool 4042 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 4043 TemplateSpecializationKind NewTSK, 4044 NamedDecl *PrevDecl, 4045 TemplateSpecializationKind PrevTSK, 4046 SourceLocation PrevPtOfInstantiation, 4047 bool &SuppressNew); 4048 4049 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 4050 const TemplateArgumentListInfo &ExplicitTemplateArgs, 4051 LookupResult &Previous); 4052 4053 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 4054 TemplateArgumentListInfo *ExplicitTemplateArgs, 4055 LookupResult &Previous); 4056 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 4057 4058 DeclResult 4059 ActOnExplicitInstantiation(Scope *S, 4060 SourceLocation ExternLoc, 4061 SourceLocation TemplateLoc, 4062 unsigned TagSpec, 4063 SourceLocation KWLoc, 4064 const CXXScopeSpec &SS, 4065 TemplateTy Template, 4066 SourceLocation TemplateNameLoc, 4067 SourceLocation LAngleLoc, 4068 ASTTemplateArgsPtr TemplateArgs, 4069 SourceLocation RAngleLoc, 4070 AttributeList *Attr); 4071 4072 DeclResult 4073 ActOnExplicitInstantiation(Scope *S, 4074 SourceLocation ExternLoc, 4075 SourceLocation TemplateLoc, 4076 unsigned TagSpec, 4077 SourceLocation KWLoc, 4078 CXXScopeSpec &SS, 4079 IdentifierInfo *Name, 4080 SourceLocation NameLoc, 4081 AttributeList *Attr); 4082 4083 DeclResult ActOnExplicitInstantiation(Scope *S, 4084 SourceLocation ExternLoc, 4085 SourceLocation TemplateLoc, 4086 Declarator &D); 4087 4088 TemplateArgumentLoc 4089 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 4090 SourceLocation TemplateLoc, 4091 SourceLocation RAngleLoc, 4092 Decl *Param, 4093 SmallVectorImpl<TemplateArgument> &Converted); 4094 4095 /// \brief Specifies the context in which a particular template 4096 /// argument is being checked. 4097 enum CheckTemplateArgumentKind { 4098 /// \brief The template argument was specified in the code or was 4099 /// instantiated with some deduced template arguments. 4100 CTAK_Specified, 4101 4102 /// \brief The template argument was deduced via template argument 4103 /// deduction. 4104 CTAK_Deduced, 4105 4106 /// \brief The template argument was deduced from an array bound 4107 /// via template argument deduction. 4108 CTAK_DeducedFromArrayBound 4109 }; 4110 4111 bool CheckTemplateArgument(NamedDecl *Param, 4112 const TemplateArgumentLoc &Arg, 4113 NamedDecl *Template, 4114 SourceLocation TemplateLoc, 4115 SourceLocation RAngleLoc, 4116 unsigned ArgumentPackIndex, 4117 SmallVectorImpl<TemplateArgument> &Converted, 4118 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4119 4120 /// \brief Check that the given template arguments can be be provided to 4121 /// the given template, converting the arguments along the way. 4122 /// 4123 /// \param Template The template to which the template arguments are being 4124 /// provided. 4125 /// 4126 /// \param TemplateLoc The location of the template name in the source. 4127 /// 4128 /// \param TemplateArgs The list of template arguments. If the template is 4129 /// a template template parameter, this function may extend the set of 4130 /// template arguments to also include substituted, defaulted template 4131 /// arguments. 4132 /// 4133 /// \param PartialTemplateArgs True if the list of template arguments is 4134 /// intentionally partial, e.g., because we're checking just the initial 4135 /// set of template arguments. 4136 /// 4137 /// \param Converted Will receive the converted, canonicalized template 4138 /// arguments. 4139 /// 4140 /// 4141 /// \param ExpansionIntoFixedList If non-NULL, will be set true to indicate 4142 /// when the template arguments contain a pack expansion that is being 4143 /// expanded into a fixed parameter list. 4144 /// 4145 /// \returns True if an error occurred, false otherwise. 4146 bool CheckTemplateArgumentList(TemplateDecl *Template, 4147 SourceLocation TemplateLoc, 4148 TemplateArgumentListInfo &TemplateArgs, 4149 bool PartialTemplateArgs, 4150 SmallVectorImpl<TemplateArgument> &Converted, 4151 bool *ExpansionIntoFixedList = 0); 4152 4153 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 4154 const TemplateArgumentLoc &Arg, 4155 SmallVectorImpl<TemplateArgument> &Converted); 4156 4157 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 4158 TypeSourceInfo *Arg); 4159 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 4160 TemplateArgument &Converted); 4161 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 4162 QualType InstantiatedParamType, Expr *Arg, 4163 TemplateArgument &Converted, 4164 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4165 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 4166 const TemplateArgumentLoc &Arg); 4167 4168 ExprResult 4169 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 4170 QualType ParamType, 4171 SourceLocation Loc); 4172 ExprResult 4173 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 4174 SourceLocation Loc); 4175 4176 /// \brief Enumeration describing how template parameter lists are compared 4177 /// for equality. 4178 enum TemplateParameterListEqualKind { 4179 /// \brief We are matching the template parameter lists of two templates 4180 /// that might be redeclarations. 4181 /// 4182 /// \code 4183 /// template<typename T> struct X; 4184 /// template<typename T> struct X; 4185 /// \endcode 4186 TPL_TemplateMatch, 4187 4188 /// \brief We are matching the template parameter lists of two template 4189 /// template parameters as part of matching the template parameter lists 4190 /// of two templates that might be redeclarations. 4191 /// 4192 /// \code 4193 /// template<template<int I> class TT> struct X; 4194 /// template<template<int Value> class Other> struct X; 4195 /// \endcode 4196 TPL_TemplateTemplateParmMatch, 4197 4198 /// \brief We are matching the template parameter lists of a template 4199 /// template argument against the template parameter lists of a template 4200 /// template parameter. 4201 /// 4202 /// \code 4203 /// template<template<int Value> class Metafun> struct X; 4204 /// template<int Value> struct integer_c; 4205 /// X<integer_c> xic; 4206 /// \endcode 4207 TPL_TemplateTemplateArgumentMatch 4208 }; 4209 4210 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 4211 TemplateParameterList *Old, 4212 bool Complain, 4213 TemplateParameterListEqualKind Kind, 4214 SourceLocation TemplateArgLoc 4215 = SourceLocation()); 4216 4217 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 4218 4219 /// \brief Called when the parser has parsed a C++ typename 4220 /// specifier, e.g., "typename T::type". 4221 /// 4222 /// \param S The scope in which this typename type occurs. 4223 /// \param TypenameLoc the location of the 'typename' keyword 4224 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4225 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 4226 /// \param IdLoc the location of the identifier. 4227 TypeResult 4228 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4229 const CXXScopeSpec &SS, const IdentifierInfo &II, 4230 SourceLocation IdLoc); 4231 4232 /// \brief Called when the parser has parsed a C++ typename 4233 /// specifier that ends in a template-id, e.g., 4234 /// "typename MetaFun::template apply<T1, T2>". 4235 /// 4236 /// \param S The scope in which this typename type occurs. 4237 /// \param TypenameLoc the location of the 'typename' keyword 4238 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4239 /// \param TemplateLoc the location of the 'template' keyword, if any. 4240 /// \param TemplateName The template name. 4241 /// \param TemplateNameLoc The location of the template name. 4242 /// \param LAngleLoc The location of the opening angle bracket ('<'). 4243 /// \param TemplateArgs The template arguments. 4244 /// \param RAngleLoc The location of the closing angle bracket ('>'). 4245 TypeResult 4246 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4247 const CXXScopeSpec &SS, 4248 SourceLocation TemplateLoc, 4249 TemplateTy Template, 4250 SourceLocation TemplateNameLoc, 4251 SourceLocation LAngleLoc, 4252 ASTTemplateArgsPtr TemplateArgs, 4253 SourceLocation RAngleLoc); 4254 4255 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 4256 SourceLocation KeywordLoc, 4257 NestedNameSpecifierLoc QualifierLoc, 4258 const IdentifierInfo &II, 4259 SourceLocation IILoc); 4260 4261 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 4262 SourceLocation Loc, 4263 DeclarationName Name); 4264 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 4265 4266 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 4267 bool RebuildTemplateParamsInCurrentInstantiation( 4268 TemplateParameterList *Params); 4269 4270 std::string 4271 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4272 const TemplateArgumentList &Args); 4273 4274 std::string 4275 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4276 const TemplateArgument *Args, 4277 unsigned NumArgs); 4278 4279 //===--------------------------------------------------------------------===// 4280 // C++ Variadic Templates (C++0x [temp.variadic]) 4281 //===--------------------------------------------------------------------===// 4282 4283 /// \brief The context in which an unexpanded parameter pack is 4284 /// being diagnosed. 4285 /// 4286 /// Note that the values of this enumeration line up with the first 4287 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4288 enum UnexpandedParameterPackContext { 4289 /// \brief An arbitrary expression. 4290 UPPC_Expression = 0, 4291 4292 /// \brief The base type of a class type. 4293 UPPC_BaseType, 4294 4295 /// \brief The type of an arbitrary declaration. 4296 UPPC_DeclarationType, 4297 4298 /// \brief The type of a data member. 4299 UPPC_DataMemberType, 4300 4301 /// \brief The size of a bit-field. 4302 UPPC_BitFieldWidth, 4303 4304 /// \brief The expression in a static assertion. 4305 UPPC_StaticAssertExpression, 4306 4307 /// \brief The fixed underlying type of an enumeration. 4308 UPPC_FixedUnderlyingType, 4309 4310 /// \brief The enumerator value. 4311 UPPC_EnumeratorValue, 4312 4313 /// \brief A using declaration. 4314 UPPC_UsingDeclaration, 4315 4316 /// \brief A friend declaration. 4317 UPPC_FriendDeclaration, 4318 4319 /// \brief A declaration qualifier. 4320 UPPC_DeclarationQualifier, 4321 4322 /// \brief An initializer. 4323 UPPC_Initializer, 4324 4325 /// \brief A default argument. 4326 UPPC_DefaultArgument, 4327 4328 /// \brief The type of a non-type template parameter. 4329 UPPC_NonTypeTemplateParameterType, 4330 4331 /// \brief The type of an exception. 4332 UPPC_ExceptionType, 4333 4334 /// \brief Partial specialization. 4335 UPPC_PartialSpecialization, 4336 4337 /// \brief Microsoft __if_exists. 4338 UPPC_IfExists, 4339 4340 /// \brief Microsoft __if_not_exists. 4341 UPPC_IfNotExists 4342}; 4343 4344 /// \brief Diagnose unexpanded parameter packs. 4345 /// 4346 /// \param Loc The location at which we should emit the diagnostic. 4347 /// 4348 /// \param UPPC The context in which we are diagnosing unexpanded 4349 /// parameter packs. 4350 /// 4351 /// \param Unexpanded the set of unexpanded parameter packs. 4352 void DiagnoseUnexpandedParameterPacks(SourceLocation Loc, 4353 UnexpandedParameterPackContext UPPC, 4354 const SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4355 4356 /// \brief If the given type contains an unexpanded parameter pack, 4357 /// diagnose the error. 4358 /// 4359 /// \param Loc The source location where a diagnostc should be emitted. 4360 /// 4361 /// \param T The type that is being checked for unexpanded parameter 4362 /// packs. 4363 /// 4364 /// \returns true if an error occurred, false otherwise. 4365 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4366 UnexpandedParameterPackContext UPPC); 4367 4368 /// \brief If the given expression contains an unexpanded parameter 4369 /// pack, diagnose the error. 4370 /// 4371 /// \param E The expression that is being checked for unexpanded 4372 /// parameter packs. 4373 /// 4374 /// \returns true if an error occurred, false otherwise. 4375 bool DiagnoseUnexpandedParameterPack(Expr *E, 4376 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4377 4378 /// \brief If the given nested-name-specifier contains an unexpanded 4379 /// parameter pack, diagnose the error. 4380 /// 4381 /// \param SS The nested-name-specifier that is being checked for 4382 /// unexpanded parameter packs. 4383 /// 4384 /// \returns true if an error occurred, false otherwise. 4385 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4386 UnexpandedParameterPackContext UPPC); 4387 4388 /// \brief If the given name contains an unexpanded parameter pack, 4389 /// diagnose the error. 4390 /// 4391 /// \param NameInfo The name (with source location information) that 4392 /// is being checked for unexpanded parameter packs. 4393 /// 4394 /// \returns true if an error occurred, false otherwise. 4395 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4396 UnexpandedParameterPackContext UPPC); 4397 4398 /// \brief If the given template name contains an unexpanded parameter pack, 4399 /// diagnose the error. 4400 /// 4401 /// \param Loc The location of the template name. 4402 /// 4403 /// \param Template The template name that is being checked for unexpanded 4404 /// parameter packs. 4405 /// 4406 /// \returns true if an error occurred, false otherwise. 4407 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4408 TemplateName Template, 4409 UnexpandedParameterPackContext UPPC); 4410 4411 /// \brief If the given template argument contains an unexpanded parameter 4412 /// pack, diagnose the error. 4413 /// 4414 /// \param Arg The template argument that is being checked for unexpanded 4415 /// parameter packs. 4416 /// 4417 /// \returns true if an error occurred, false otherwise. 4418 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4419 UnexpandedParameterPackContext UPPC); 4420 4421 /// \brief Collect the set of unexpanded parameter packs within the given 4422 /// template argument. 4423 /// 4424 /// \param Arg The template argument that will be traversed to find 4425 /// unexpanded parameter packs. 4426 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4427 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4428 4429 /// \brief Collect the set of unexpanded parameter packs within the given 4430 /// template argument. 4431 /// 4432 /// \param Arg The template argument that will be traversed to find 4433 /// unexpanded parameter packs. 4434 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4435 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4436 4437 /// \brief Collect the set of unexpanded parameter packs within the given 4438 /// type. 4439 /// 4440 /// \param T The type that will be traversed to find 4441 /// unexpanded parameter packs. 4442 void collectUnexpandedParameterPacks(QualType T, 4443 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4444 4445 /// \brief Collect the set of unexpanded parameter packs within the given 4446 /// type. 4447 /// 4448 /// \param TL The type that will be traversed to find 4449 /// unexpanded parameter packs. 4450 void collectUnexpandedParameterPacks(TypeLoc TL, 4451 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4452 4453 /// \brief Collect the set of unexpanded parameter packs within the given 4454 /// nested-name-specifier. 4455 /// 4456 /// \param SS The nested-name-specifier that will be traversed to find 4457 /// unexpanded parameter packs. 4458 void collectUnexpandedParameterPacks(CXXScopeSpec &SS, 4459 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4460 4461 /// \brief Collect the set of unexpanded parameter packs within the given 4462 /// name. 4463 /// 4464 /// \param NameInfo The name that will be traversed to find 4465 /// unexpanded parameter packs. 4466 void collectUnexpandedParameterPacks(const DeclarationNameInfo &NameInfo, 4467 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4468 4469 /// \brief Invoked when parsing a template argument followed by an 4470 /// ellipsis, which creates a pack expansion. 4471 /// 4472 /// \param Arg The template argument preceding the ellipsis, which 4473 /// may already be invalid. 4474 /// 4475 /// \param EllipsisLoc The location of the ellipsis. 4476 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4477 SourceLocation EllipsisLoc); 4478 4479 /// \brief Invoked when parsing a type followed by an ellipsis, which 4480 /// creates a pack expansion. 4481 /// 4482 /// \param Type The type preceding the ellipsis, which will become 4483 /// the pattern of the pack expansion. 4484 /// 4485 /// \param EllipsisLoc The location of the ellipsis. 4486 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4487 4488 /// \brief Construct a pack expansion type from the pattern of the pack 4489 /// expansion. 4490 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4491 SourceLocation EllipsisLoc, 4492 llvm::Optional<unsigned> NumExpansions); 4493 4494 /// \brief Construct a pack expansion type from the pattern of the pack 4495 /// expansion. 4496 QualType CheckPackExpansion(QualType Pattern, 4497 SourceRange PatternRange, 4498 SourceLocation EllipsisLoc, 4499 llvm::Optional<unsigned> NumExpansions); 4500 4501 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4502 /// creates a pack expansion. 4503 /// 4504 /// \param Pattern The expression preceding the ellipsis, which will become 4505 /// the pattern of the pack expansion. 4506 /// 4507 /// \param EllipsisLoc The location of the ellipsis. 4508 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4509 4510 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4511 /// creates a pack expansion. 4512 /// 4513 /// \param Pattern The expression preceding the ellipsis, which will become 4514 /// the pattern of the pack expansion. 4515 /// 4516 /// \param EllipsisLoc The location of the ellipsis. 4517 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4518 llvm::Optional<unsigned> NumExpansions); 4519 4520 /// \brief Determine whether we could expand a pack expansion with the 4521 /// given set of parameter packs into separate arguments by repeatedly 4522 /// transforming the pattern. 4523 /// 4524 /// \param EllipsisLoc The location of the ellipsis that identifies the 4525 /// pack expansion. 4526 /// 4527 /// \param PatternRange The source range that covers the entire pattern of 4528 /// the pack expansion. 4529 /// 4530 /// \param Unexpanded The set of unexpanded parameter packs within the 4531 /// pattern. 4532 /// 4533 /// \param NumUnexpanded The number of unexpanded parameter packs in 4534 /// \p Unexpanded. 4535 /// 4536 /// \param ShouldExpand Will be set to \c true if the transformer should 4537 /// expand the corresponding pack expansions into separate arguments. When 4538 /// set, \c NumExpansions must also be set. 4539 /// 4540 /// \param RetainExpansion Whether the caller should add an unexpanded 4541 /// pack expansion after all of the expanded arguments. This is used 4542 /// when extending explicitly-specified template argument packs per 4543 /// C++0x [temp.arg.explicit]p9. 4544 /// 4545 /// \param NumExpansions The number of separate arguments that will be in 4546 /// the expanded form of the corresponding pack expansion. This is both an 4547 /// input and an output parameter, which can be set by the caller if the 4548 /// number of expansions is known a priori (e.g., due to a prior substitution) 4549 /// and will be set by the callee when the number of expansions is known. 4550 /// The callee must set this value when \c ShouldExpand is \c true; it may 4551 /// set this value in other cases. 4552 /// 4553 /// \returns true if an error occurred (e.g., because the parameter packs 4554 /// are to be instantiated with arguments of different lengths), false 4555 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4556 /// must be set. 4557 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4558 SourceRange PatternRange, 4559 llvm::ArrayRef<UnexpandedParameterPack> Unexpanded, 4560 const MultiLevelTemplateArgumentList &TemplateArgs, 4561 bool &ShouldExpand, 4562 bool &RetainExpansion, 4563 llvm::Optional<unsigned> &NumExpansions); 4564 4565 /// \brief Determine the number of arguments in the given pack expansion 4566 /// type. 4567 /// 4568 /// This routine already assumes that the pack expansion type can be 4569 /// expanded and that the number of arguments in the expansion is 4570 /// consistent across all of the unexpanded parameter packs in its pattern. 4571 unsigned getNumArgumentsInExpansion(QualType T, 4572 const MultiLevelTemplateArgumentList &TemplateArgs); 4573 4574 /// \brief Determine whether the given declarator contains any unexpanded 4575 /// parameter packs. 4576 /// 4577 /// This routine is used by the parser to disambiguate function declarators 4578 /// with an ellipsis prior to the ')', e.g., 4579 /// 4580 /// \code 4581 /// void f(T...); 4582 /// \endcode 4583 /// 4584 /// To determine whether we have an (unnamed) function parameter pack or 4585 /// a variadic function. 4586 /// 4587 /// \returns true if the declarator contains any unexpanded parameter packs, 4588 /// false otherwise. 4589 bool containsUnexpandedParameterPacks(Declarator &D); 4590 4591 //===--------------------------------------------------------------------===// 4592 // C++ Template Argument Deduction (C++ [temp.deduct]) 4593 //===--------------------------------------------------------------------===// 4594 4595 /// \brief Describes the result of template argument deduction. 4596 /// 4597 /// The TemplateDeductionResult enumeration describes the result of 4598 /// template argument deduction, as returned from 4599 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4600 /// structure provides additional information about the results of 4601 /// template argument deduction, e.g., the deduced template argument 4602 /// list (if successful) or the specific template parameters or 4603 /// deduced arguments that were involved in the failure. 4604 enum TemplateDeductionResult { 4605 /// \brief Template argument deduction was successful. 4606 TDK_Success = 0, 4607 /// \brief Template argument deduction exceeded the maximum template 4608 /// instantiation depth (which has already been diagnosed). 4609 TDK_InstantiationDepth, 4610 /// \brief Template argument deduction did not deduce a value 4611 /// for every template parameter. 4612 TDK_Incomplete, 4613 /// \brief Template argument deduction produced inconsistent 4614 /// deduced values for the given template parameter. 4615 TDK_Inconsistent, 4616 /// \brief Template argument deduction failed due to inconsistent 4617 /// cv-qualifiers on a template parameter type that would 4618 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4619 /// but were given a non-const "X". 4620 TDK_Underqualified, 4621 /// \brief Substitution of the deduced template argument values 4622 /// resulted in an error. 4623 TDK_SubstitutionFailure, 4624 /// \brief Substitution of the deduced template argument values 4625 /// into a non-deduced context produced a type or value that 4626 /// produces a type that does not match the original template 4627 /// arguments provided. 4628 TDK_NonDeducedMismatch, 4629 /// \brief When performing template argument deduction for a function 4630 /// template, there were too many call arguments. 4631 TDK_TooManyArguments, 4632 /// \brief When performing template argument deduction for a function 4633 /// template, there were too few call arguments. 4634 TDK_TooFewArguments, 4635 /// \brief The explicitly-specified template arguments were not valid 4636 /// template arguments for the given template. 4637 TDK_InvalidExplicitArguments, 4638 /// \brief The arguments included an overloaded function name that could 4639 /// not be resolved to a suitable function. 4640 TDK_FailedOverloadResolution 4641 }; 4642 4643 TemplateDeductionResult 4644 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4645 const TemplateArgumentList &TemplateArgs, 4646 sema::TemplateDeductionInfo &Info); 4647 4648 TemplateDeductionResult 4649 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4650 TemplateArgumentListInfo &ExplicitTemplateArgs, 4651 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4652 SmallVectorImpl<QualType> &ParamTypes, 4653 QualType *FunctionType, 4654 sema::TemplateDeductionInfo &Info); 4655 4656 /// brief A function argument from which we performed template argument 4657 // deduction for a call. 4658 struct OriginalCallArg { 4659 OriginalCallArg(QualType OriginalParamType, 4660 unsigned ArgIdx, 4661 QualType OriginalArgType) 4662 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4663 OriginalArgType(OriginalArgType) { } 4664 4665 QualType OriginalParamType; 4666 unsigned ArgIdx; 4667 QualType OriginalArgType; 4668 }; 4669 4670 TemplateDeductionResult 4671 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4672 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4673 unsigned NumExplicitlySpecified, 4674 FunctionDecl *&Specialization, 4675 sema::TemplateDeductionInfo &Info, 4676 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4677 4678 TemplateDeductionResult 4679 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4680 TemplateArgumentListInfo *ExplicitTemplateArgs, 4681 Expr **Args, unsigned NumArgs, 4682 FunctionDecl *&Specialization, 4683 sema::TemplateDeductionInfo &Info); 4684 4685 TemplateDeductionResult 4686 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4687 TemplateArgumentListInfo *ExplicitTemplateArgs, 4688 QualType ArgFunctionType, 4689 FunctionDecl *&Specialization, 4690 sema::TemplateDeductionInfo &Info); 4691 4692 TemplateDeductionResult 4693 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4694 QualType ToType, 4695 CXXConversionDecl *&Specialization, 4696 sema::TemplateDeductionInfo &Info); 4697 4698 TemplateDeductionResult 4699 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4700 TemplateArgumentListInfo *ExplicitTemplateArgs, 4701 FunctionDecl *&Specialization, 4702 sema::TemplateDeductionInfo &Info); 4703 4704 /// \brief Result type of DeduceAutoType. 4705 enum DeduceAutoResult { 4706 DAR_Succeeded, 4707 DAR_Failed, 4708 DAR_FailedAlreadyDiagnosed 4709 }; 4710 4711 DeduceAutoResult DeduceAutoType(TypeSourceInfo *AutoType, Expr *&Initializer, 4712 TypeSourceInfo *&Result); 4713 void DiagnoseAutoDeductionFailure(VarDecl *VDecl, Expr *Init); 4714 4715 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4716 FunctionTemplateDecl *FT2, 4717 SourceLocation Loc, 4718 TemplatePartialOrderingContext TPOC, 4719 unsigned NumCallArguments); 4720 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4721 UnresolvedSetIterator SEnd, 4722 TemplatePartialOrderingContext TPOC, 4723 unsigned NumCallArguments, 4724 SourceLocation Loc, 4725 const PartialDiagnostic &NoneDiag, 4726 const PartialDiagnostic &AmbigDiag, 4727 const PartialDiagnostic &CandidateDiag, 4728 bool Complain = true, 4729 QualType TargetType = QualType()); 4730 4731 ClassTemplatePartialSpecializationDecl * 4732 getMoreSpecializedPartialSpecialization( 4733 ClassTemplatePartialSpecializationDecl *PS1, 4734 ClassTemplatePartialSpecializationDecl *PS2, 4735 SourceLocation Loc); 4736 4737 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4738 bool OnlyDeduced, 4739 unsigned Depth, 4740 llvm::SmallBitVector &Used); 4741 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4742 llvm::SmallBitVector &Deduced) { 4743 return MarkDeducedTemplateParameters(Context, FunctionTemplate, Deduced); 4744 } 4745 static void MarkDeducedTemplateParameters(ASTContext &Ctx, 4746 FunctionTemplateDecl *FunctionTemplate, 4747 llvm::SmallBitVector &Deduced); 4748 4749 //===--------------------------------------------------------------------===// 4750 // C++ Template Instantiation 4751 // 4752 4753 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4754 const TemplateArgumentList *Innermost = 0, 4755 bool RelativeToPrimary = false, 4756 const FunctionDecl *Pattern = 0); 4757 4758 /// \brief A template instantiation that is currently in progress. 4759 struct ActiveTemplateInstantiation { 4760 /// \brief The kind of template instantiation we are performing 4761 enum InstantiationKind { 4762 /// We are instantiating a template declaration. The entity is 4763 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4764 TemplateInstantiation, 4765 4766 /// We are instantiating a default argument for a template 4767 /// parameter. The Entity is the template, and 4768 /// TemplateArgs/NumTemplateArguments provides the template 4769 /// arguments as specified. 4770 /// FIXME: Use a TemplateArgumentList 4771 DefaultTemplateArgumentInstantiation, 4772 4773 /// We are instantiating a default argument for a function. 4774 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4775 /// provides the template arguments as specified. 4776 DefaultFunctionArgumentInstantiation, 4777 4778 /// We are substituting explicit template arguments provided for 4779 /// a function template. The entity is a FunctionTemplateDecl. 4780 ExplicitTemplateArgumentSubstitution, 4781 4782 /// We are substituting template argument determined as part of 4783 /// template argument deduction for either a class template 4784 /// partial specialization or a function template. The 4785 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4786 /// a FunctionTemplateDecl. 4787 DeducedTemplateArgumentSubstitution, 4788 4789 /// We are substituting prior template arguments into a new 4790 /// template parameter. The template parameter itself is either a 4791 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4792 PriorTemplateArgumentSubstitution, 4793 4794 /// We are checking the validity of a default template argument that 4795 /// has been used when naming a template-id. 4796 DefaultTemplateArgumentChecking 4797 } Kind; 4798 4799 /// \brief The point of instantiation within the source code. 4800 SourceLocation PointOfInstantiation; 4801 4802 /// \brief The template (or partial specialization) in which we are 4803 /// performing the instantiation, for substitutions of prior template 4804 /// arguments. 4805 NamedDecl *Template; 4806 4807 /// \brief The entity that is being instantiated. 4808 uintptr_t Entity; 4809 4810 /// \brief The list of template arguments we are substituting, if they 4811 /// are not part of the entity. 4812 const TemplateArgument *TemplateArgs; 4813 4814 /// \brief The number of template arguments in TemplateArgs. 4815 unsigned NumTemplateArgs; 4816 4817 /// \brief The template deduction info object associated with the 4818 /// substitution or checking of explicit or deduced template arguments. 4819 sema::TemplateDeductionInfo *DeductionInfo; 4820 4821 /// \brief The source range that covers the construct that cause 4822 /// the instantiation, e.g., the template-id that causes a class 4823 /// template instantiation. 4824 SourceRange InstantiationRange; 4825 4826 ActiveTemplateInstantiation() 4827 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4828 NumTemplateArgs(0), DeductionInfo(0) {} 4829 4830 /// \brief Determines whether this template is an actual instantiation 4831 /// that should be counted toward the maximum instantiation depth. 4832 bool isInstantiationRecord() const; 4833 4834 friend bool operator==(const ActiveTemplateInstantiation &X, 4835 const ActiveTemplateInstantiation &Y) { 4836 if (X.Kind != Y.Kind) 4837 return false; 4838 4839 if (X.Entity != Y.Entity) 4840 return false; 4841 4842 switch (X.Kind) { 4843 case TemplateInstantiation: 4844 return true; 4845 4846 case PriorTemplateArgumentSubstitution: 4847 case DefaultTemplateArgumentChecking: 4848 if (X.Template != Y.Template) 4849 return false; 4850 4851 // Fall through 4852 4853 case DefaultTemplateArgumentInstantiation: 4854 case ExplicitTemplateArgumentSubstitution: 4855 case DeducedTemplateArgumentSubstitution: 4856 case DefaultFunctionArgumentInstantiation: 4857 return X.TemplateArgs == Y.TemplateArgs; 4858 4859 } 4860 4861 llvm_unreachable("Invalid InstantiationKind!"); 4862 } 4863 4864 friend bool operator!=(const ActiveTemplateInstantiation &X, 4865 const ActiveTemplateInstantiation &Y) { 4866 return !(X == Y); 4867 } 4868 }; 4869 4870 /// \brief List of active template instantiations. 4871 /// 4872 /// This vector is treated as a stack. As one template instantiation 4873 /// requires another template instantiation, additional 4874 /// instantiations are pushed onto the stack up to a 4875 /// user-configurable limit LangOptions::InstantiationDepth. 4876 SmallVector<ActiveTemplateInstantiation, 16> 4877 ActiveTemplateInstantiations; 4878 4879 /// \brief Whether we are in a SFINAE context that is not associated with 4880 /// template instantiation. 4881 /// 4882 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4883 /// of a template instantiation or template argument deduction. 4884 bool InNonInstantiationSFINAEContext; 4885 4886 /// \brief The number of ActiveTemplateInstantiation entries in 4887 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4888 /// therefore, should not be counted as part of the instantiation depth. 4889 unsigned NonInstantiationEntries; 4890 4891 /// \brief The last template from which a template instantiation 4892 /// error or warning was produced. 4893 /// 4894 /// This value is used to suppress printing of redundant template 4895 /// instantiation backtraces when there are multiple errors in the 4896 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4897 /// to implement it anywhere else. 4898 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4899 4900 /// \brief The current index into pack expansion arguments that will be 4901 /// used for substitution of parameter packs. 4902 /// 4903 /// The pack expansion index will be -1 to indicate that parameter packs 4904 /// should be instantiated as themselves. Otherwise, the index specifies 4905 /// which argument within the parameter pack will be used for substitution. 4906 int ArgumentPackSubstitutionIndex; 4907 4908 /// \brief RAII object used to change the argument pack substitution index 4909 /// within a \c Sema object. 4910 /// 4911 /// See \c ArgumentPackSubstitutionIndex for more information. 4912 class ArgumentPackSubstitutionIndexRAII { 4913 Sema &Self; 4914 int OldSubstitutionIndex; 4915 4916 public: 4917 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4918 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4919 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4920 } 4921 4922 ~ArgumentPackSubstitutionIndexRAII() { 4923 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4924 } 4925 }; 4926 4927 friend class ArgumentPackSubstitutionRAII; 4928 4929 /// \brief The stack of calls expression undergoing template instantiation. 4930 /// 4931 /// The top of this stack is used by a fixit instantiating unresolved 4932 /// function calls to fix the AST to match the textual change it prints. 4933 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4934 4935 /// \brief For each declaration that involved template argument deduction, the 4936 /// set of diagnostics that were suppressed during that template argument 4937 /// deduction. 4938 /// 4939 /// FIXME: Serialize this structure to the AST file. 4940 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 4941 SuppressedDiagnostics; 4942 4943 /// \brief A stack object to be created when performing template 4944 /// instantiation. 4945 /// 4946 /// Construction of an object of type \c InstantiatingTemplate 4947 /// pushes the current instantiation onto the stack of active 4948 /// instantiations. If the size of this stack exceeds the maximum 4949 /// number of recursive template instantiations, construction 4950 /// produces an error and evaluates true. 4951 /// 4952 /// Destruction of this object will pop the named instantiation off 4953 /// the stack. 4954 struct InstantiatingTemplate { 4955 /// \brief Note that we are instantiating a class template, 4956 /// function template, or a member thereof. 4957 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4958 Decl *Entity, 4959 SourceRange InstantiationRange = SourceRange()); 4960 4961 /// \brief Note that we are instantiating a default argument in a 4962 /// template-id. 4963 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4964 TemplateDecl *Template, 4965 const TemplateArgument *TemplateArgs, 4966 unsigned NumTemplateArgs, 4967 SourceRange InstantiationRange = SourceRange()); 4968 4969 /// \brief Note that we are instantiating a default argument in a 4970 /// template-id. 4971 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4972 FunctionTemplateDecl *FunctionTemplate, 4973 const TemplateArgument *TemplateArgs, 4974 unsigned NumTemplateArgs, 4975 ActiveTemplateInstantiation::InstantiationKind Kind, 4976 sema::TemplateDeductionInfo &DeductionInfo, 4977 SourceRange InstantiationRange = SourceRange()); 4978 4979 /// \brief Note that we are instantiating as part of template 4980 /// argument deduction for a class template partial 4981 /// specialization. 4982 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4983 ClassTemplatePartialSpecializationDecl *PartialSpec, 4984 const TemplateArgument *TemplateArgs, 4985 unsigned NumTemplateArgs, 4986 sema::TemplateDeductionInfo &DeductionInfo, 4987 SourceRange InstantiationRange = SourceRange()); 4988 4989 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4990 ParmVarDecl *Param, 4991 const TemplateArgument *TemplateArgs, 4992 unsigned NumTemplateArgs, 4993 SourceRange InstantiationRange = SourceRange()); 4994 4995 /// \brief Note that we are substituting prior template arguments into a 4996 /// non-type or template template parameter. 4997 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4998 NamedDecl *Template, 4999 NonTypeTemplateParmDecl *Param, 5000 const TemplateArgument *TemplateArgs, 5001 unsigned NumTemplateArgs, 5002 SourceRange InstantiationRange); 5003 5004 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5005 NamedDecl *Template, 5006 TemplateTemplateParmDecl *Param, 5007 const TemplateArgument *TemplateArgs, 5008 unsigned NumTemplateArgs, 5009 SourceRange InstantiationRange); 5010 5011 /// \brief Note that we are checking the default template argument 5012 /// against the template parameter for a given template-id. 5013 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5014 TemplateDecl *Template, 5015 NamedDecl *Param, 5016 const TemplateArgument *TemplateArgs, 5017 unsigned NumTemplateArgs, 5018 SourceRange InstantiationRange); 5019 5020 5021 /// \brief Note that we have finished instantiating this template. 5022 void Clear(); 5023 5024 ~InstantiatingTemplate() { Clear(); } 5025 5026 /// \brief Determines whether we have exceeded the maximum 5027 /// recursive template instantiations. 5028 operator bool() const { return Invalid; } 5029 5030 private: 5031 Sema &SemaRef; 5032 bool Invalid; 5033 bool SavedInNonInstantiationSFINAEContext; 5034 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 5035 SourceRange InstantiationRange); 5036 5037 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 5038 5039 InstantiatingTemplate& 5040 operator=(const InstantiatingTemplate&); // not implemented 5041 }; 5042 5043 void PrintInstantiationStack(); 5044 5045 /// \brief Determines whether we are currently in a context where 5046 /// template argument substitution failures are not considered 5047 /// errors. 5048 /// 5049 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 5050 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 5051 /// template-deduction context object, which can be used to capture 5052 /// diagnostics that will be suppressed. 5053 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 5054 5055 /// \brief RAII class used to determine whether SFINAE has 5056 /// trapped any errors that occur during template argument 5057 /// deduction.` 5058 class SFINAETrap { 5059 Sema &SemaRef; 5060 unsigned PrevSFINAEErrors; 5061 bool PrevInNonInstantiationSFINAEContext; 5062 bool PrevAccessCheckingSFINAE; 5063 5064 public: 5065 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 5066 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 5067 PrevInNonInstantiationSFINAEContext( 5068 SemaRef.InNonInstantiationSFINAEContext), 5069 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 5070 { 5071 if (!SemaRef.isSFINAEContext()) 5072 SemaRef.InNonInstantiationSFINAEContext = true; 5073 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 5074 } 5075 5076 ~SFINAETrap() { 5077 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 5078 SemaRef.InNonInstantiationSFINAEContext 5079 = PrevInNonInstantiationSFINAEContext; 5080 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 5081 } 5082 5083 /// \brief Determine whether any SFINAE errors have been trapped. 5084 bool hasErrorOccurred() const { 5085 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 5086 } 5087 }; 5088 5089 /// \brief The current instantiation scope used to store local 5090 /// variables. 5091 LocalInstantiationScope *CurrentInstantiationScope; 5092 5093 /// \brief The number of typos corrected by CorrectTypo. 5094 unsigned TyposCorrected; 5095 5096 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 5097 UnqualifiedTyposCorrectedMap; 5098 5099 /// \brief A cache containing the results of typo correction for unqualified 5100 /// name lookup. 5101 /// 5102 /// The string is the string that we corrected to (which may be empty, if 5103 /// there was no correction), while the boolean will be true when the 5104 /// string represents a keyword. 5105 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 5106 5107 /// \brief Worker object for performing CFG-based warnings. 5108 sema::AnalysisBasedWarnings AnalysisWarnings; 5109 5110 /// \brief An entity for which implicit template instantiation is required. 5111 /// 5112 /// The source location associated with the declaration is the first place in 5113 /// the source code where the declaration was "used". It is not necessarily 5114 /// the point of instantiation (which will be either before or after the 5115 /// namespace-scope declaration that triggered this implicit instantiation), 5116 /// However, it is the location that diagnostics should generally refer to, 5117 /// because users will need to know what code triggered the instantiation. 5118 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 5119 5120 /// \brief The queue of implicit template instantiations that are required 5121 /// but have not yet been performed. 5122 std::deque<PendingImplicitInstantiation> PendingInstantiations; 5123 5124 /// \brief The queue of implicit template instantiations that are required 5125 /// and must be performed within the current local scope. 5126 /// 5127 /// This queue is only used for member functions of local classes in 5128 /// templates, which must be instantiated in the same scope as their 5129 /// enclosing function, so that they can reference function-local 5130 /// types, static variables, enumerators, etc. 5131 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 5132 5133 void PerformPendingInstantiations(bool LocalOnly = false); 5134 5135 TypeSourceInfo *SubstType(TypeSourceInfo *T, 5136 const MultiLevelTemplateArgumentList &TemplateArgs, 5137 SourceLocation Loc, DeclarationName Entity); 5138 5139 QualType SubstType(QualType T, 5140 const MultiLevelTemplateArgumentList &TemplateArgs, 5141 SourceLocation Loc, DeclarationName Entity); 5142 5143 TypeSourceInfo *SubstType(TypeLoc TL, 5144 const MultiLevelTemplateArgumentList &TemplateArgs, 5145 SourceLocation Loc, DeclarationName Entity); 5146 5147 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 5148 const MultiLevelTemplateArgumentList &TemplateArgs, 5149 SourceLocation Loc, 5150 DeclarationName Entity); 5151 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 5152 const MultiLevelTemplateArgumentList &TemplateArgs, 5153 int indexAdjustment, 5154 llvm::Optional<unsigned> NumExpansions, 5155 bool ExpectParameterPack); 5156 bool SubstParmTypes(SourceLocation Loc, 5157 ParmVarDecl **Params, unsigned NumParams, 5158 const MultiLevelTemplateArgumentList &TemplateArgs, 5159 SmallVectorImpl<QualType> &ParamTypes, 5160 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 5161 ExprResult SubstExpr(Expr *E, 5162 const MultiLevelTemplateArgumentList &TemplateArgs); 5163 5164 /// \brief Substitute the given template arguments into a list of 5165 /// expressions, expanding pack expansions if required. 5166 /// 5167 /// \param Exprs The list of expressions to substitute into. 5168 /// 5169 /// \param NumExprs The number of expressions in \p Exprs. 5170 /// 5171 /// \param IsCall Whether this is some form of call, in which case 5172 /// default arguments will be dropped. 5173 /// 5174 /// \param TemplateArgs The set of template arguments to substitute. 5175 /// 5176 /// \param Outputs Will receive all of the substituted arguments. 5177 /// 5178 /// \returns true if an error occurred, false otherwise. 5179 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 5180 const MultiLevelTemplateArgumentList &TemplateArgs, 5181 SmallVectorImpl<Expr *> &Outputs); 5182 5183 StmtResult SubstStmt(Stmt *S, 5184 const MultiLevelTemplateArgumentList &TemplateArgs); 5185 5186 Decl *SubstDecl(Decl *D, DeclContext *Owner, 5187 const MultiLevelTemplateArgumentList &TemplateArgs); 5188 5189 bool 5190 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 5191 CXXRecordDecl *Pattern, 5192 const MultiLevelTemplateArgumentList &TemplateArgs); 5193 5194 bool 5195 InstantiateClass(SourceLocation PointOfInstantiation, 5196 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 5197 const MultiLevelTemplateArgumentList &TemplateArgs, 5198 TemplateSpecializationKind TSK, 5199 bool Complain = true); 5200 5201 struct LateInstantiatedAttribute { 5202 const Attr *TmplAttr; 5203 LocalInstantiationScope *Scope; 5204 Decl *NewDecl; 5205 5206 LateInstantiatedAttribute(const Attr *A, LocalInstantiationScope *S, 5207 Decl *D) 5208 : TmplAttr(A), Scope(S), NewDecl(D) 5209 { } 5210 }; 5211 typedef SmallVector<LateInstantiatedAttribute, 16> LateInstantiatedAttrVec; 5212 5213 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 5214 const Decl *Pattern, Decl *Inst, 5215 LateInstantiatedAttrVec *LateAttrs = 0, 5216 LocalInstantiationScope *OuterMostScope = 0); 5217 5218 bool 5219 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 5220 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5221 TemplateSpecializationKind TSK, 5222 bool Complain = true); 5223 5224 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 5225 CXXRecordDecl *Instantiation, 5226 const MultiLevelTemplateArgumentList &TemplateArgs, 5227 TemplateSpecializationKind TSK); 5228 5229 void InstantiateClassTemplateSpecializationMembers( 5230 SourceLocation PointOfInstantiation, 5231 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5232 TemplateSpecializationKind TSK); 5233 5234 NestedNameSpecifierLoc 5235 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 5236 const MultiLevelTemplateArgumentList &TemplateArgs); 5237 5238 DeclarationNameInfo 5239 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 5240 const MultiLevelTemplateArgumentList &TemplateArgs); 5241 TemplateName 5242 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 5243 SourceLocation Loc, 5244 const MultiLevelTemplateArgumentList &TemplateArgs); 5245 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 5246 TemplateArgumentListInfo &Result, 5247 const MultiLevelTemplateArgumentList &TemplateArgs); 5248 5249 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 5250 FunctionDecl *Function, 5251 bool Recursive = false, 5252 bool DefinitionRequired = false); 5253 void InstantiateStaticDataMemberDefinition( 5254 SourceLocation PointOfInstantiation, 5255 VarDecl *Var, 5256 bool Recursive = false, 5257 bool DefinitionRequired = false); 5258 5259 void InstantiateMemInitializers(CXXConstructorDecl *New, 5260 const CXXConstructorDecl *Tmpl, 5261 const MultiLevelTemplateArgumentList &TemplateArgs); 5262 bool InstantiateInitializer(Expr *Init, 5263 const MultiLevelTemplateArgumentList &TemplateArgs, 5264 SourceLocation &LParenLoc, 5265 ASTOwningVector<Expr*> &NewArgs, 5266 SourceLocation &RParenLoc); 5267 5268 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 5269 const MultiLevelTemplateArgumentList &TemplateArgs); 5270 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 5271 const MultiLevelTemplateArgumentList &TemplateArgs); 5272 5273 // Objective-C declarations. 5274 enum ObjCContainerKind { 5275 OCK_None = -1, 5276 OCK_Interface = 0, 5277 OCK_Protocol, 5278 OCK_Category, 5279 OCK_ClassExtension, 5280 OCK_Implementation, 5281 OCK_CategoryImplementation 5282 }; 5283 ObjCContainerKind getObjCContainerKind() const; 5284 5285 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 5286 IdentifierInfo *ClassName, 5287 SourceLocation ClassLoc, 5288 IdentifierInfo *SuperName, 5289 SourceLocation SuperLoc, 5290 Decl * const *ProtoRefs, 5291 unsigned NumProtoRefs, 5292 const SourceLocation *ProtoLocs, 5293 SourceLocation EndProtoLoc, 5294 AttributeList *AttrList); 5295 5296 Decl *ActOnCompatiblityAlias( 5297 SourceLocation AtCompatibilityAliasLoc, 5298 IdentifierInfo *AliasName, SourceLocation AliasLocation, 5299 IdentifierInfo *ClassName, SourceLocation ClassLocation); 5300 5301 bool CheckForwardProtocolDeclarationForCircularDependency( 5302 IdentifierInfo *PName, 5303 SourceLocation &PLoc, SourceLocation PrevLoc, 5304 const ObjCList<ObjCProtocolDecl> &PList); 5305 5306 Decl *ActOnStartProtocolInterface( 5307 SourceLocation AtProtoInterfaceLoc, 5308 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 5309 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 5310 const SourceLocation *ProtoLocs, 5311 SourceLocation EndProtoLoc, 5312 AttributeList *AttrList); 5313 5314 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 5315 IdentifierInfo *ClassName, 5316 SourceLocation ClassLoc, 5317 IdentifierInfo *CategoryName, 5318 SourceLocation CategoryLoc, 5319 Decl * const *ProtoRefs, 5320 unsigned NumProtoRefs, 5321 const SourceLocation *ProtoLocs, 5322 SourceLocation EndProtoLoc); 5323 5324 Decl *ActOnStartClassImplementation( 5325 SourceLocation AtClassImplLoc, 5326 IdentifierInfo *ClassName, SourceLocation ClassLoc, 5327 IdentifierInfo *SuperClassname, 5328 SourceLocation SuperClassLoc); 5329 5330 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 5331 IdentifierInfo *ClassName, 5332 SourceLocation ClassLoc, 5333 IdentifierInfo *CatName, 5334 SourceLocation CatLoc); 5335 5336 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc, 5337 IdentifierInfo **IdentList, 5338 SourceLocation *IdentLocs, 5339 unsigned NumElts); 5340 5341 DeclGroupPtrTy ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 5342 const IdentifierLocPair *IdentList, 5343 unsigned NumElts, 5344 AttributeList *attrList); 5345 5346 void FindProtocolDeclaration(bool WarnOnDeclarations, 5347 const IdentifierLocPair *ProtocolId, 5348 unsigned NumProtocols, 5349 SmallVectorImpl<Decl *> &Protocols); 5350 5351 /// Ensure attributes are consistent with type. 5352 /// \param [in, out] Attributes The attributes to check; they will 5353 /// be modified to be consistent with \arg PropertyTy. 5354 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5355 SourceLocation Loc, 5356 unsigned &Attributes); 5357 5358 /// Process the specified property declaration and create decls for the 5359 /// setters and getters as needed. 5360 /// \param property The property declaration being processed 5361 /// \param DC The semantic container for the property 5362 /// \param redeclaredProperty Declaration for property if redeclared 5363 /// in class extension. 5364 /// \param lexicalDC Container for redeclaredProperty. 5365 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5366 ObjCContainerDecl *DC, 5367 ObjCPropertyDecl *redeclaredProperty = 0, 5368 ObjCContainerDecl *lexicalDC = 0); 5369 5370 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5371 ObjCPropertyDecl *SuperProperty, 5372 const IdentifierInfo *Name); 5373 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5374 5375 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5376 ObjCMethodDecl *MethodDecl, 5377 bool IsInstance); 5378 5379 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5380 5381 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5382 ObjCInterfaceDecl *ID); 5383 5384 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5385 ObjCProtocolDecl *PDecl); 5386 5387 Decl *ActOnAtEnd(Scope *S, SourceRange AtEnd, 5388 Decl **allMethods = 0, unsigned allNum = 0, 5389 Decl **allProperties = 0, unsigned pNum = 0, 5390 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5391 5392 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5393 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5394 Selector GetterSel, Selector SetterSel, 5395 bool *OverridingProperty, 5396 tok::ObjCKeywordKind MethodImplKind, 5397 DeclContext *lexicalDC = 0); 5398 5399 Decl *ActOnPropertyImplDecl(Scope *S, 5400 SourceLocation AtLoc, 5401 SourceLocation PropertyLoc, 5402 bool ImplKind, 5403 IdentifierInfo *PropertyId, 5404 IdentifierInfo *PropertyIvar, 5405 SourceLocation PropertyIvarLoc); 5406 5407 enum ObjCSpecialMethodKind { 5408 OSMK_None, 5409 OSMK_Alloc, 5410 OSMK_New, 5411 OSMK_Copy, 5412 OSMK_RetainingInit, 5413 OSMK_NonRetainingInit 5414 }; 5415 5416 struct ObjCArgInfo { 5417 IdentifierInfo *Name; 5418 SourceLocation NameLoc; 5419 // The Type is null if no type was specified, and the DeclSpec is invalid 5420 // in this case. 5421 ParsedType Type; 5422 ObjCDeclSpec DeclSpec; 5423 5424 /// ArgAttrs - Attribute list for this argument. 5425 AttributeList *ArgAttrs; 5426 }; 5427 5428 Decl *ActOnMethodDeclaration( 5429 Scope *S, 5430 SourceLocation BeginLoc, // location of the + or -. 5431 SourceLocation EndLoc, // location of the ; or {. 5432 tok::TokenKind MethodType, 5433 ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5434 ArrayRef<SourceLocation> SelectorLocs, Selector Sel, 5435 // optional arguments. The number of types/arguments is obtained 5436 // from the Sel.getNumArgs(). 5437 ObjCArgInfo *ArgInfo, 5438 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5439 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5440 bool isVariadic, bool MethodDefinition); 5441 5442 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5443 // Will search "local" class/category implementations for a method decl. 5444 // Will also search in class's root looking for instance method. 5445 // Returns 0 if no method is found. 5446 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5447 ObjCInterfaceDecl *CDecl); 5448 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5449 ObjCInterfaceDecl *ClassDecl); 5450 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5451 const ObjCObjectPointerType *OPT, 5452 bool IsInstance); 5453 ObjCMethodDecl *LookupMethodInObjectType(Selector Sel, QualType Ty, 5454 bool IsInstance); 5455 5456 bool inferObjCARCLifetime(ValueDecl *decl); 5457 5458 ExprResult 5459 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5460 Expr *BaseExpr, 5461 SourceLocation OpLoc, 5462 DeclarationName MemberName, 5463 SourceLocation MemberLoc, 5464 SourceLocation SuperLoc, QualType SuperType, 5465 bool Super); 5466 5467 ExprResult 5468 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5469 IdentifierInfo &propertyName, 5470 SourceLocation receiverNameLoc, 5471 SourceLocation propertyNameLoc); 5472 5473 ObjCMethodDecl *tryCaptureObjCSelf(SourceLocation Loc); 5474 5475 /// \brief Describes the kind of message expression indicated by a message 5476 /// send that starts with an identifier. 5477 enum ObjCMessageKind { 5478 /// \brief The message is sent to 'super'. 5479 ObjCSuperMessage, 5480 /// \brief The message is an instance message. 5481 ObjCInstanceMessage, 5482 /// \brief The message is a class message, and the identifier is a type 5483 /// name. 5484 ObjCClassMessage 5485 }; 5486 5487 ObjCMessageKind getObjCMessageKind(Scope *S, 5488 IdentifierInfo *Name, 5489 SourceLocation NameLoc, 5490 bool IsSuper, 5491 bool HasTrailingDot, 5492 ParsedType &ReceiverType); 5493 5494 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5495 Selector Sel, 5496 SourceLocation LBracLoc, 5497 ArrayRef<SourceLocation> SelectorLocs, 5498 SourceLocation RBracLoc, 5499 MultiExprArg Args); 5500 5501 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5502 QualType ReceiverType, 5503 SourceLocation SuperLoc, 5504 Selector Sel, 5505 ObjCMethodDecl *Method, 5506 SourceLocation LBracLoc, 5507 ArrayRef<SourceLocation> SelectorLocs, 5508 SourceLocation RBracLoc, 5509 MultiExprArg Args, 5510 bool isImplicit = false); 5511 5512 ExprResult BuildClassMessageImplicit(QualType ReceiverType, 5513 bool isSuperReceiver, 5514 SourceLocation Loc, 5515 Selector Sel, 5516 ObjCMethodDecl *Method, 5517 MultiExprArg Args); 5518 5519 ExprResult ActOnClassMessage(Scope *S, 5520 ParsedType Receiver, 5521 Selector Sel, 5522 SourceLocation LBracLoc, 5523 ArrayRef<SourceLocation> SelectorLocs, 5524 SourceLocation RBracLoc, 5525 MultiExprArg Args); 5526 5527 ExprResult BuildInstanceMessage(Expr *Receiver, 5528 QualType ReceiverType, 5529 SourceLocation SuperLoc, 5530 Selector Sel, 5531 ObjCMethodDecl *Method, 5532 SourceLocation LBracLoc, 5533 ArrayRef<SourceLocation> SelectorLocs, 5534 SourceLocation RBracLoc, 5535 MultiExprArg Args, 5536 bool isImplicit = false); 5537 5538 ExprResult BuildInstanceMessageImplicit(Expr *Receiver, 5539 QualType ReceiverType, 5540 SourceLocation Loc, 5541 Selector Sel, 5542 ObjCMethodDecl *Method, 5543 MultiExprArg Args); 5544 5545 ExprResult ActOnInstanceMessage(Scope *S, 5546 Expr *Receiver, 5547 Selector Sel, 5548 SourceLocation LBracLoc, 5549 ArrayRef<SourceLocation> SelectorLocs, 5550 SourceLocation RBracLoc, 5551 MultiExprArg Args); 5552 5553 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5554 ObjCBridgeCastKind Kind, 5555 SourceLocation BridgeKeywordLoc, 5556 TypeSourceInfo *TSInfo, 5557 Expr *SubExpr); 5558 5559 ExprResult ActOnObjCBridgedCast(Scope *S, 5560 SourceLocation LParenLoc, 5561 ObjCBridgeCastKind Kind, 5562 SourceLocation BridgeKeywordLoc, 5563 ParsedType Type, 5564 SourceLocation RParenLoc, 5565 Expr *SubExpr); 5566 5567 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5568 5569 /// \brief Check whether the given new method is a valid override of the 5570 /// given overridden method, and set any properties that should be inherited. 5571 void CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5572 const ObjCMethodDecl *Overridden, 5573 bool IsImplementation); 5574 5575 /// \brief Check whether the given method overrides any methods in its class, 5576 /// calling \c CheckObjCMethodOverride for each overridden method. 5577 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5578 5579 enum PragmaOptionsAlignKind { 5580 POAK_Native, // #pragma options align=native 5581 POAK_Natural, // #pragma options align=natural 5582 POAK_Packed, // #pragma options align=packed 5583 POAK_Power, // #pragma options align=power 5584 POAK_Mac68k, // #pragma options align=mac68k 5585 POAK_Reset // #pragma options align=reset 5586 }; 5587 5588 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5589 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5590 SourceLocation PragmaLoc, 5591 SourceLocation KindLoc); 5592 5593 enum PragmaPackKind { 5594 PPK_Default, // #pragma pack([n]) 5595 PPK_Show, // #pragma pack(show), only supported by MSVC. 5596 PPK_Push, // #pragma pack(push, [identifier], [n]) 5597 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5598 }; 5599 5600 enum PragmaMSStructKind { 5601 PMSST_OFF, // #pragms ms_struct off 5602 PMSST_ON // #pragms ms_struct on 5603 }; 5604 5605 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5606 void ActOnPragmaPack(PragmaPackKind Kind, 5607 IdentifierInfo *Name, 5608 Expr *Alignment, 5609 SourceLocation PragmaLoc, 5610 SourceLocation LParenLoc, 5611 SourceLocation RParenLoc); 5612 5613 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5614 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5615 5616 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5617 void ActOnPragmaUnused(const Token &Identifier, 5618 Scope *curScope, 5619 SourceLocation PragmaLoc); 5620 5621 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5622 void ActOnPragmaVisibility(const IdentifierInfo* VisType, 5623 SourceLocation PragmaLoc); 5624 5625 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II, 5626 SourceLocation Loc); 5627 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5628 5629 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5630 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5631 SourceLocation PragmaLoc, 5632 SourceLocation WeakNameLoc); 5633 5634 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5635 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5636 IdentifierInfo* AliasName, 5637 SourceLocation PragmaLoc, 5638 SourceLocation WeakNameLoc, 5639 SourceLocation AliasNameLoc); 5640 5641 /// ActOnPragmaFPContract - Called on well formed 5642 /// #pragma {STDC,OPENCL} FP_CONTRACT 5643 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5644 5645 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5646 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5647 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5648 5649 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5650 void AddMsStructLayoutForRecord(RecordDecl *RD); 5651 5652 /// FreePackedContext - Deallocate and null out PackContext. 5653 void FreePackedContext(); 5654 5655 /// PushNamespaceVisibilityAttr - Note that we've entered a 5656 /// namespace with a visibility attribute. 5657 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr, 5658 SourceLocation Loc); 5659 5660 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5661 /// add an appropriate visibility attribute. 5662 void AddPushedVisibilityAttribute(Decl *RD); 5663 5664 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5665 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5666 void PopPragmaVisibility(bool IsNamespaceEnd, SourceLocation EndLoc); 5667 5668 /// FreeVisContext - Deallocate and null out VisContext. 5669 void FreeVisContext(); 5670 5671 /// AddCFAuditedAttribute - Check whether we're currently within 5672 /// '#pragma clang arc_cf_code_audited' and, if so, consider adding 5673 /// the appropriate attribute. 5674 void AddCFAuditedAttribute(Decl *D); 5675 5676 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5677 void AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E); 5678 void AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *T); 5679 5680 /// \brief The kind of conversion being performed. 5681 enum CheckedConversionKind { 5682 /// \brief An implicit conversion. 5683 CCK_ImplicitConversion, 5684 /// \brief A C-style cast. 5685 CCK_CStyleCast, 5686 /// \brief A functional-style cast. 5687 CCK_FunctionalCast, 5688 /// \brief A cast other than a C-style cast. 5689 CCK_OtherCast 5690 }; 5691 5692 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5693 /// cast. If there is already an implicit cast, merge into the existing one. 5694 /// If isLvalue, the result of the cast is an lvalue. 5695 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5696 ExprValueKind VK = VK_RValue, 5697 const CXXCastPath *BasePath = 0, 5698 CheckedConversionKind CCK 5699 = CCK_ImplicitConversion); 5700 5701 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5702 /// to the conversion from scalar type ScalarTy to the Boolean type. 5703 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5704 5705 /// IgnoredValueConversions - Given that an expression's result is 5706 /// syntactically ignored, perform any conversions that are 5707 /// required. 5708 ExprResult IgnoredValueConversions(Expr *E); 5709 5710 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5711 // functions and arrays to their respective pointers (C99 6.3.2.1). 5712 ExprResult UsualUnaryConversions(Expr *E); 5713 5714 // DefaultFunctionArrayConversion - converts functions and arrays 5715 // to their respective pointers (C99 6.3.2.1). 5716 ExprResult DefaultFunctionArrayConversion(Expr *E); 5717 5718 // DefaultFunctionArrayLvalueConversion - converts functions and 5719 // arrays to their respective pointers and performs the 5720 // lvalue-to-rvalue conversion. 5721 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5722 5723 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5724 // the operand. This is DefaultFunctionArrayLvalueConversion, 5725 // except that it assumes the operand isn't of function or array 5726 // type. 5727 ExprResult DefaultLvalueConversion(Expr *E); 5728 5729 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5730 // do not have a prototype. Integer promotions are performed on each 5731 // argument, and arguments that have type float are promoted to double. 5732 ExprResult DefaultArgumentPromotion(Expr *E); 5733 5734 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5735 enum VariadicCallType { 5736 VariadicFunction, 5737 VariadicBlock, 5738 VariadicMethod, 5739 VariadicConstructor, 5740 VariadicDoesNotApply 5741 }; 5742 5743 /// GatherArgumentsForCall - Collector argument expressions for various 5744 /// form of call prototypes. 5745 bool GatherArgumentsForCall(SourceLocation CallLoc, 5746 FunctionDecl *FDecl, 5747 const FunctionProtoType *Proto, 5748 unsigned FirstProtoArg, 5749 Expr **Args, unsigned NumArgs, 5750 SmallVector<Expr *, 8> &AllArgs, 5751 VariadicCallType CallType = VariadicDoesNotApply); 5752 5753 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5754 // will warn if the resulting type is not a POD type. 5755 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5756 FunctionDecl *FDecl); 5757 5758 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5759 // operands and then handles various conversions that are common to binary 5760 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5761 // routine returns the first non-arithmetic type found. The client is 5762 // responsible for emitting appropriate error diagnostics. 5763 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS, 5764 bool IsCompAssign = false); 5765 5766 /// AssignConvertType - All of the 'assignment' semantic checks return this 5767 /// enum to indicate whether the assignment was allowed. These checks are 5768 /// done for simple assignments, as well as initialization, return from 5769 /// function, argument passing, etc. The query is phrased in terms of a 5770 /// source and destination type. 5771 enum AssignConvertType { 5772 /// Compatible - the types are compatible according to the standard. 5773 Compatible, 5774 5775 /// PointerToInt - The assignment converts a pointer to an int, which we 5776 /// accept as an extension. 5777 PointerToInt, 5778 5779 /// IntToPointer - The assignment converts an int to a pointer, which we 5780 /// accept as an extension. 5781 IntToPointer, 5782 5783 /// FunctionVoidPointer - The assignment is between a function pointer and 5784 /// void*, which the standard doesn't allow, but we accept as an extension. 5785 FunctionVoidPointer, 5786 5787 /// IncompatiblePointer - The assignment is between two pointers types that 5788 /// are not compatible, but we accept them as an extension. 5789 IncompatiblePointer, 5790 5791 /// IncompatiblePointer - The assignment is between two pointers types which 5792 /// point to integers which have a different sign, but are otherwise 5793 /// identical. This is a subset of the above, but broken out because it's by 5794 /// far the most common case of incompatible pointers. 5795 IncompatiblePointerSign, 5796 5797 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5798 /// c/v/r qualifiers, which we accept as an extension. 5799 CompatiblePointerDiscardsQualifiers, 5800 5801 /// IncompatiblePointerDiscardsQualifiers - The assignment 5802 /// discards qualifiers that we don't permit to be discarded, 5803 /// like address spaces. 5804 IncompatiblePointerDiscardsQualifiers, 5805 5806 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5807 /// nested pointer types, and the qualifiers other than the first two 5808 /// levels differ e.g. char ** -> const char **, but we accept them as an 5809 /// extension. 5810 IncompatibleNestedPointerQualifiers, 5811 5812 /// IncompatibleVectors - The assignment is between two vector types that 5813 /// have the same size, which we accept as an extension. 5814 IncompatibleVectors, 5815 5816 /// IntToBlockPointer - The assignment converts an int to a block 5817 /// pointer. We disallow this. 5818 IntToBlockPointer, 5819 5820 /// IncompatibleBlockPointer - The assignment is between two block 5821 /// pointers types that are not compatible. 5822 IncompatibleBlockPointer, 5823 5824 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5825 /// id type and something else (that is incompatible with it). For example, 5826 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5827 IncompatibleObjCQualifiedId, 5828 5829 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 5830 /// object with __weak qualifier. 5831 IncompatibleObjCWeakRef, 5832 5833 /// Incompatible - We reject this conversion outright, it is invalid to 5834 /// represent it in the AST. 5835 Incompatible 5836 }; 5837 5838 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5839 /// assignment conversion type specified by ConvTy. This returns true if the 5840 /// conversion was invalid or false if the conversion was accepted. 5841 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5842 SourceLocation Loc, 5843 QualType DstType, QualType SrcType, 5844 Expr *SrcExpr, AssignmentAction Action, 5845 bool *Complained = 0); 5846 5847 /// CheckAssignmentConstraints - Perform type checking for assignment, 5848 /// argument passing, variable initialization, and function return values. 5849 /// C99 6.5.16. 5850 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5851 QualType LHSType, 5852 QualType RHSType); 5853 5854 /// Check assignment constraints and prepare for a conversion of the 5855 /// RHS to the LHS type. 5856 AssignConvertType CheckAssignmentConstraints(QualType LHSType, 5857 ExprResult &RHS, 5858 CastKind &Kind); 5859 5860 // CheckSingleAssignmentConstraints - Currently used by 5861 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5862 // this routine performs the default function/array converions. 5863 AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType, 5864 ExprResult &RHS, 5865 bool Diagnose = true); 5866 5867 // \brief If the lhs type is a transparent union, check whether we 5868 // can initialize the transparent union with the given expression. 5869 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType, 5870 ExprResult &RHS); 5871 5872 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5873 5874 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5875 5876 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5877 AssignmentAction Action, 5878 bool AllowExplicit = false); 5879 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5880 AssignmentAction Action, 5881 bool AllowExplicit, 5882 ImplicitConversionSequence& ICS); 5883 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5884 const ImplicitConversionSequence& ICS, 5885 AssignmentAction Action, 5886 CheckedConversionKind CCK 5887 = CCK_ImplicitConversion); 5888 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5889 const StandardConversionSequence& SCS, 5890 AssignmentAction Action, 5891 CheckedConversionKind CCK); 5892 5893 /// the following "Check" methods will return a valid/converted QualType 5894 /// or a null QualType (indicating an error diagnostic was issued). 5895 5896 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5897 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS, 5898 ExprResult &RHS); 5899 QualType CheckPointerToMemberOperands( // C++ 5.5 5900 ExprResult &LHS, ExprResult &RHS, ExprValueKind &VK, 5901 SourceLocation OpLoc, bool isIndirect); 5902 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5903 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign, 5904 bool IsDivide); 5905 QualType CheckRemainderOperands( // C99 6.5.5 5906 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5907 bool IsCompAssign = false); 5908 QualType CheckAdditionOperands( // C99 6.5.6 5909 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5910 QualType* CompLHSTy = 0); 5911 QualType CheckSubtractionOperands( // C99 6.5.6 5912 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5913 QualType* CompLHSTy = 0); 5914 QualType CheckShiftOperands( // C99 6.5.7 5915 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 5916 bool IsCompAssign = false); 5917 QualType CheckCompareOperands( // C99 6.5.8/9 5918 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned OpaqueOpc, 5919 bool isRelational); 5920 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 5921 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5922 bool IsCompAssign = false); 5923 QualType CheckLogicalOperands( // C99 6.5.[13,14] 5924 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc); 5925 // CheckAssignmentOperands is used for both simple and compound assignment. 5926 // For simple assignment, pass both expressions and a null converted type. 5927 // For compound assignment, pass both expressions and the converted type. 5928 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 5929 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType); 5930 5931 ExprResult checkPseudoObjectIncDec(Scope *S, SourceLocation OpLoc, 5932 UnaryOperatorKind Opcode, Expr *Op); 5933 ExprResult checkPseudoObjectAssignment(Scope *S, SourceLocation OpLoc, 5934 BinaryOperatorKind Opcode, 5935 Expr *LHS, Expr *RHS); 5936 ExprResult checkPseudoObjectRValue(Expr *E); 5937 Expr *recreateSyntacticForm(PseudoObjectExpr *E); 5938 5939 QualType CheckConditionalOperands( // C99 6.5.15 5940 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS, 5941 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc); 5942 QualType CXXCheckConditionalOperands( // C++ 5.16 5943 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5944 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5945 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 5946 bool *NonStandardCompositeType = 0); 5947 QualType FindCompositePointerType(SourceLocation Loc, 5948 ExprResult &E1, ExprResult &E2, 5949 bool *NonStandardCompositeType = 0) { 5950 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 5951 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, 5952 NonStandardCompositeType); 5953 E1 = Owned(E1Tmp); 5954 E2 = Owned(E2Tmp); 5955 return Composite; 5956 } 5957 5958 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5959 SourceLocation QuestionLoc); 5960 5961 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr, 5962 SourceLocation QuestionLoc); 5963 5964 /// type checking for vector binary operators. 5965 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS, 5966 SourceLocation Loc, bool IsCompAssign); 5967 QualType GetSignedVectorType(QualType V); 5968 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS, 5969 SourceLocation Loc, bool isRelational); 5970 QualType CheckVectorLogicalOperands(ExprResult &LHS, ExprResult &RHS, 5971 SourceLocation Loc); 5972 5973 /// type checking declaration initializers (C99 6.7.8) 5974 bool CheckForConstantInitializer(Expr *e, QualType t); 5975 5976 // type checking C++ declaration initializers (C++ [dcl.init]). 5977 5978 /// ReferenceCompareResult - Expresses the result of comparing two 5979 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5980 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5981 enum ReferenceCompareResult { 5982 /// Ref_Incompatible - The two types are incompatible, so direct 5983 /// reference binding is not possible. 5984 Ref_Incompatible = 0, 5985 /// Ref_Related - The two types are reference-related, which means 5986 /// that their unqualified forms (T1 and T2) are either the same 5987 /// or T1 is a base class of T2. 5988 Ref_Related, 5989 /// Ref_Compatible_With_Added_Qualification - The two types are 5990 /// reference-compatible with added qualification, meaning that 5991 /// they are reference-compatible and the qualifiers on T1 (cv1) 5992 /// are greater than the qualifiers on T2 (cv2). 5993 Ref_Compatible_With_Added_Qualification, 5994 /// Ref_Compatible - The two types are reference-compatible and 5995 /// have equivalent qualifiers (cv1 == cv2). 5996 Ref_Compatible 5997 }; 5998 5999 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 6000 QualType T1, QualType T2, 6001 bool &DerivedToBase, 6002 bool &ObjCConversion, 6003 bool &ObjCLifetimeConversion); 6004 6005 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType, 6006 Expr *CastExpr, CastKind &CastKind, 6007 ExprValueKind &VK, CXXCastPath &Path); 6008 6009 /// \brief Force an expression with unknown-type to an expression of the 6010 /// given type. 6011 ExprResult forceUnknownAnyToType(Expr *E, QualType ToType); 6012 6013 // CheckVectorCast - check type constraints for vectors. 6014 // Since vectors are an extension, there are no C standard reference for this. 6015 // We allow casting between vectors and integer datatypes of the same size. 6016 // returns true if the cast is invalid 6017 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 6018 CastKind &Kind); 6019 6020 // CheckExtVectorCast - check type constraints for extended vectors. 6021 // Since vectors are an extension, there are no C standard reference for this. 6022 // We allow casting between vectors and integer datatypes of the same size, 6023 // or vectors and the element type of that vector. 6024 // returns the cast expr 6025 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr, 6026 CastKind &Kind); 6027 6028 ExprResult BuildCXXFunctionalCastExpr(TypeSourceInfo *TInfo, 6029 SourceLocation LParenLoc, 6030 Expr *CastExpr, 6031 SourceLocation RParenLoc); 6032 6033 enum ARCConversionResult { ACR_okay, ACR_unbridged }; 6034 6035 /// \brief Checks for invalid conversions and casts between 6036 /// retainable pointers and other pointer kinds. 6037 ARCConversionResult CheckObjCARCConversion(SourceRange castRange, 6038 QualType castType, Expr *&op, 6039 CheckedConversionKind CCK); 6040 6041 Expr *stripARCUnbridgedCast(Expr *e); 6042 void diagnoseARCUnbridgedCast(Expr *e); 6043 6044 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 6045 QualType ExprType); 6046 6047 /// checkRetainCycles - Check whether an Objective-C message send 6048 /// might create an obvious retain cycle. 6049 void checkRetainCycles(ObjCMessageExpr *msg); 6050 void checkRetainCycles(Expr *receiver, Expr *argument); 6051 6052 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 6053 /// to weak/__unsafe_unretained type. 6054 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 6055 6056 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 6057 /// to weak/__unsafe_unretained expression. 6058 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 6059 6060 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 6061 /// \param Method - May be null. 6062 /// \param [out] ReturnType - The return type of the send. 6063 /// \return true iff there were any incompatible types. 6064 bool CheckMessageArgumentTypes(QualType ReceiverType, 6065 Expr **Args, unsigned NumArgs, Selector Sel, 6066 ObjCMethodDecl *Method, bool isClassMessage, 6067 bool isSuperMessage, 6068 SourceLocation lbrac, SourceLocation rbrac, 6069 QualType &ReturnType, ExprValueKind &VK); 6070 6071 /// \brief Determine the result of a message send expression based on 6072 /// the type of the receiver, the method expected to receive the message, 6073 /// and the form of the message send. 6074 QualType getMessageSendResultType(QualType ReceiverType, 6075 ObjCMethodDecl *Method, 6076 bool isClassMessage, bool isSuperMessage); 6077 6078 /// \brief If the given expression involves a message send to a method 6079 /// with a related result type, emit a note describing what happened. 6080 void EmitRelatedResultTypeNote(const Expr *E); 6081 6082 /// CheckBooleanCondition - Diagnose problems involving the use of 6083 /// the given expression as a boolean condition (e.g. in an if 6084 /// statement). Also performs the standard function and array 6085 /// decays, possibly changing the input variable. 6086 /// 6087 /// \param Loc - A location associated with the condition, e.g. the 6088 /// 'if' keyword. 6089 /// \return true iff there were any errors 6090 ExprResult CheckBooleanCondition(Expr *E, SourceLocation Loc); 6091 6092 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 6093 Expr *SubExpr); 6094 6095 /// DiagnoseAssignmentAsCondition - Given that an expression is 6096 /// being used as a boolean condition, warn if it's an assignment. 6097 void DiagnoseAssignmentAsCondition(Expr *E); 6098 6099 /// \brief Redundant parentheses over an equality comparison can indicate 6100 /// that the user intended an assignment used as condition. 6101 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE); 6102 6103 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 6104 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 6105 6106 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 6107 /// the specified width and sign. If an overflow occurs, detect it and emit 6108 /// the specified diagnostic. 6109 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 6110 unsigned NewWidth, bool NewSign, 6111 SourceLocation Loc, unsigned DiagID); 6112 6113 /// Checks that the Objective-C declaration is declared in the global scope. 6114 /// Emits an error and marks the declaration as invalid if it's not declared 6115 /// in the global scope. 6116 bool CheckObjCDeclScope(Decl *D); 6117 6118 /// VerifyIntegerConstantExpression - Verifies that an expression is an ICE, 6119 /// and reports the appropriate diagnostics. Returns false on success. 6120 /// Can optionally return the value of the expression. 6121 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, 6122 PartialDiagnostic Diag, 6123 bool AllowFold, 6124 PartialDiagnostic FoldDiag); 6125 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, 6126 PartialDiagnostic Diag, 6127 bool AllowFold = true) { 6128 return VerifyIntegerConstantExpression(E, Result, Diag, AllowFold, 6129 PDiag(0)); 6130 } 6131 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result = 0); 6132 6133 /// VerifyBitField - verifies that a bit field expression is an ICE and has 6134 /// the correct width, and that the field type is valid. 6135 /// Returns false on success. 6136 /// Can optionally return whether the bit-field is of width 0 6137 ExprResult VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 6138 QualType FieldTy, Expr *BitWidth, 6139 bool *ZeroWidth = 0); 6140 6141 enum CUDAFunctionTarget { 6142 CFT_Device, 6143 CFT_Global, 6144 CFT_Host, 6145 CFT_HostDevice 6146 }; 6147 6148 CUDAFunctionTarget IdentifyCUDATarget(const FunctionDecl *D); 6149 6150 bool CheckCUDATarget(CUDAFunctionTarget CallerTarget, 6151 CUDAFunctionTarget CalleeTarget); 6152 6153 bool CheckCUDATarget(const FunctionDecl *Caller, const FunctionDecl *Callee) { 6154 return CheckCUDATarget(IdentifyCUDATarget(Caller), 6155 IdentifyCUDATarget(Callee)); 6156 } 6157 6158 /// \name Code completion 6159 //@{ 6160 /// \brief Describes the context in which code completion occurs. 6161 enum ParserCompletionContext { 6162 /// \brief Code completion occurs at top-level or namespace context. 6163 PCC_Namespace, 6164 /// \brief Code completion occurs within a class, struct, or union. 6165 PCC_Class, 6166 /// \brief Code completion occurs within an Objective-C interface, protocol, 6167 /// or category. 6168 PCC_ObjCInterface, 6169 /// \brief Code completion occurs within an Objective-C implementation or 6170 /// category implementation 6171 PCC_ObjCImplementation, 6172 /// \brief Code completion occurs within the list of instance variables 6173 /// in an Objective-C interface, protocol, category, or implementation. 6174 PCC_ObjCInstanceVariableList, 6175 /// \brief Code completion occurs following one or more template 6176 /// headers. 6177 PCC_Template, 6178 /// \brief Code completion occurs following one or more template 6179 /// headers within a class. 6180 PCC_MemberTemplate, 6181 /// \brief Code completion occurs within an expression. 6182 PCC_Expression, 6183 /// \brief Code completion occurs within a statement, which may 6184 /// also be an expression or a declaration. 6185 PCC_Statement, 6186 /// \brief Code completion occurs at the beginning of the 6187 /// initialization statement (or expression) in a for loop. 6188 PCC_ForInit, 6189 /// \brief Code completion occurs within the condition of an if, 6190 /// while, switch, or for statement. 6191 PCC_Condition, 6192 /// \brief Code completion occurs within the body of a function on a 6193 /// recovery path, where we do not have a specific handle on our position 6194 /// in the grammar. 6195 PCC_RecoveryInFunction, 6196 /// \brief Code completion occurs where only a type is permitted. 6197 PCC_Type, 6198 /// \brief Code completion occurs in a parenthesized expression, which 6199 /// might also be a type cast. 6200 PCC_ParenthesizedExpression, 6201 /// \brief Code completion occurs within a sequence of declaration 6202 /// specifiers within a function, method, or block. 6203 PCC_LocalDeclarationSpecifiers 6204 }; 6205 6206 void CodeCompleteModuleImport(SourceLocation ImportLoc, ModuleIdPath Path); 6207 void CodeCompleteOrdinaryName(Scope *S, 6208 ParserCompletionContext CompletionContext); 6209 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 6210 bool AllowNonIdentifiers, 6211 bool AllowNestedNameSpecifiers); 6212 6213 struct CodeCompleteExpressionData; 6214 void CodeCompleteExpression(Scope *S, 6215 const CodeCompleteExpressionData &Data); 6216 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 6217 SourceLocation OpLoc, 6218 bool IsArrow); 6219 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 6220 void CodeCompleteTag(Scope *S, unsigned TagSpec); 6221 void CodeCompleteTypeQualifiers(DeclSpec &DS); 6222 void CodeCompleteCase(Scope *S); 6223 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 6224 void CodeCompleteInitializer(Scope *S, Decl *D); 6225 void CodeCompleteReturn(Scope *S); 6226 void CodeCompleteAfterIf(Scope *S); 6227 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 6228 6229 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 6230 bool EnteringContext); 6231 void CodeCompleteUsing(Scope *S); 6232 void CodeCompleteUsingDirective(Scope *S); 6233 void CodeCompleteNamespaceDecl(Scope *S); 6234 void CodeCompleteNamespaceAliasDecl(Scope *S); 6235 void CodeCompleteOperatorName(Scope *S); 6236 void CodeCompleteConstructorInitializer(Decl *Constructor, 6237 CXXCtorInitializer** Initializers, 6238 unsigned NumInitializers); 6239 6240 void CodeCompleteObjCAtDirective(Scope *S); 6241 void CodeCompleteObjCAtVisibility(Scope *S); 6242 void CodeCompleteObjCAtStatement(Scope *S); 6243 void CodeCompleteObjCAtExpression(Scope *S); 6244 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 6245 void CodeCompleteObjCPropertyGetter(Scope *S); 6246 void CodeCompleteObjCPropertySetter(Scope *S); 6247 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 6248 bool IsParameter); 6249 void CodeCompleteObjCMessageReceiver(Scope *S); 6250 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 6251 IdentifierInfo **SelIdents, 6252 unsigned NumSelIdents, 6253 bool AtArgumentExpression); 6254 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 6255 IdentifierInfo **SelIdents, 6256 unsigned NumSelIdents, 6257 bool AtArgumentExpression, 6258 bool IsSuper = false); 6259 void CodeCompleteObjCInstanceMessage(Scope *S, Expr *Receiver, 6260 IdentifierInfo **SelIdents, 6261 unsigned NumSelIdents, 6262 bool AtArgumentExpression, 6263 ObjCInterfaceDecl *Super = 0); 6264 void CodeCompleteObjCForCollection(Scope *S, 6265 DeclGroupPtrTy IterationVar); 6266 void CodeCompleteObjCSelector(Scope *S, 6267 IdentifierInfo **SelIdents, 6268 unsigned NumSelIdents); 6269 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 6270 unsigned NumProtocols); 6271 void CodeCompleteObjCProtocolDecl(Scope *S); 6272 void CodeCompleteObjCInterfaceDecl(Scope *S); 6273 void CodeCompleteObjCSuperclass(Scope *S, 6274 IdentifierInfo *ClassName, 6275 SourceLocation ClassNameLoc); 6276 void CodeCompleteObjCImplementationDecl(Scope *S); 6277 void CodeCompleteObjCInterfaceCategory(Scope *S, 6278 IdentifierInfo *ClassName, 6279 SourceLocation ClassNameLoc); 6280 void CodeCompleteObjCImplementationCategory(Scope *S, 6281 IdentifierInfo *ClassName, 6282 SourceLocation ClassNameLoc); 6283 void CodeCompleteObjCPropertyDefinition(Scope *S); 6284 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 6285 IdentifierInfo *PropertyName); 6286 void CodeCompleteObjCMethodDecl(Scope *S, 6287 bool IsInstanceMethod, 6288 ParsedType ReturnType); 6289 void CodeCompleteObjCMethodDeclSelector(Scope *S, 6290 bool IsInstanceMethod, 6291 bool AtParameterName, 6292 ParsedType ReturnType, 6293 IdentifierInfo **SelIdents, 6294 unsigned NumSelIdents); 6295 void CodeCompletePreprocessorDirective(bool InConditional); 6296 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 6297 void CodeCompletePreprocessorMacroName(bool IsDefinition); 6298 void CodeCompletePreprocessorExpression(); 6299 void CodeCompletePreprocessorMacroArgument(Scope *S, 6300 IdentifierInfo *Macro, 6301 MacroInfo *MacroInfo, 6302 unsigned Argument); 6303 void CodeCompleteNaturalLanguage(); 6304 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 6305 SmallVectorImpl<CodeCompletionResult> &Results); 6306 //@} 6307 6308 //===--------------------------------------------------------------------===// 6309 // Extra semantic analysis beyond the C type system 6310 6311public: 6312 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 6313 unsigned ByteNo) const; 6314 6315private: 6316 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr, 6317 const ArraySubscriptExpr *ASE=0, 6318 bool AllowOnePastEnd=true, bool IndexNegated=false); 6319 void CheckArrayAccess(const Expr *E); 6320 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 6321 bool CheckObjCMethodCall(ObjCMethodDecl *Method, SourceLocation loc, 6322 Expr **Args, unsigned NumArgs); 6323 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 6324 6325 bool CheckObjCString(Expr *Arg); 6326 6327 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6328 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6329 6330 bool SemaBuiltinVAStart(CallExpr *TheCall); 6331 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 6332 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 6333 6334public: 6335 // Used by C++ template instantiation. 6336 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 6337 6338private: 6339 bool SemaBuiltinPrefetch(CallExpr *TheCall); 6340 bool SemaBuiltinObjectSize(CallExpr *TheCall); 6341 bool SemaBuiltinLongjmp(CallExpr *TheCall); 6342 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 6343 ExprResult SemaAtomicOpsOverloaded(ExprResult TheCallResult, 6344 AtomicExpr::AtomicOp Op); 6345 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 6346 llvm::APSInt &Result); 6347 6348 enum FormatStringType { 6349 FST_Scanf, 6350 FST_Printf, 6351 FST_NSString, 6352 FST_Strftime, 6353 FST_Strfmon, 6354 FST_Kprintf, 6355 FST_Unknown 6356 }; 6357 static FormatStringType GetFormatStringType(const FormatAttr *Format); 6358 bool SemaCheckStringLiteral(const Expr *E, Expr **Args, unsigned NumArgs, 6359 bool HasVAListArg, unsigned format_idx, 6360 unsigned firstDataArg, FormatStringType Type, 6361 bool inFunctionCall = true); 6362 6363 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 6364 Expr **Args, unsigned NumArgs, bool HasVAListArg, 6365 unsigned format_idx, unsigned firstDataArg, 6366 FormatStringType Type, bool inFunctionCall); 6367 6368 void CheckFormatArguments(const FormatAttr *Format, CallExpr *TheCall); 6369 void CheckFormatArguments(const FormatAttr *Format, Expr **Args, 6370 unsigned NumArgs, bool IsCXXMember, 6371 SourceLocation Loc, SourceRange Range); 6372 void CheckFormatArguments(Expr **Args, unsigned NumArgs, 6373 bool HasVAListArg, unsigned format_idx, 6374 unsigned firstDataArg, FormatStringType Type, 6375 SourceLocation Loc, SourceRange range); 6376 6377 void CheckNonNullArguments(const NonNullAttr *NonNull, 6378 const Expr * const *ExprArgs, 6379 SourceLocation CallSiteLoc); 6380 6381 void CheckMemaccessArguments(const CallExpr *Call, 6382 unsigned BId, 6383 IdentifierInfo *FnName); 6384 6385 void CheckStrlcpycatArguments(const CallExpr *Call, 6386 IdentifierInfo *FnName); 6387 6388 void CheckStrncatArguments(const CallExpr *Call, 6389 IdentifierInfo *FnName); 6390 6391 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 6392 SourceLocation ReturnLoc); 6393 void CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr* RHS); 6394 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 6395 6396 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 6397 Expr *Init); 6398 6399 /// \brief The parser's current scope. 6400 /// 6401 /// The parser maintains this state here. 6402 Scope *CurScope; 6403 6404protected: 6405 friend class Parser; 6406 friend class InitializationSequence; 6407 friend class ASTReader; 6408 friend class ASTWriter; 6409 6410public: 6411 /// \brief Retrieve the parser's current scope. 6412 /// 6413 /// This routine must only be used when it is certain that semantic analysis 6414 /// and the parser are in precisely the same context, which is not the case 6415 /// when, e.g., we are performing any kind of template instantiation. 6416 /// Therefore, the only safe places to use this scope are in the parser 6417 /// itself and in routines directly invoked from the parser and *never* from 6418 /// template substitution or instantiation. 6419 Scope *getCurScope() const { return CurScope; } 6420 6421 Decl *getObjCDeclContext() const; 6422 6423 DeclContext *getCurLexicalContext() const { 6424 return OriginalLexicalContext ? OriginalLexicalContext : CurContext; 6425 } 6426 6427 AvailabilityResult getCurContextAvailability() const; 6428}; 6429 6430/// \brief RAII object that enters a new expression evaluation context. 6431class EnterExpressionEvaluationContext { 6432 Sema &Actions; 6433 6434public: 6435 EnterExpressionEvaluationContext(Sema &Actions, 6436 Sema::ExpressionEvaluationContext NewContext) 6437 : Actions(Actions) { 6438 Actions.PushExpressionEvaluationContext(NewContext); 6439 } 6440 6441 ~EnterExpressionEvaluationContext() { 6442 Actions.PopExpressionEvaluationContext(); 6443 } 6444}; 6445 6446} // end namespace clang 6447 6448#endif 6449