Sema.h revision e6975e9b0985ad7f7ff9187e38d95bfe9ac4181b
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/TypoCorrection.h" 26#include "clang/Sema/Weak.h" 27#include "clang/AST/Expr.h" 28#include "clang/AST/ExprObjC.h" 29#include "clang/AST/DeclarationName.h" 30#include "clang/AST/ExternalASTSource.h" 31#include "clang/AST/TypeLoc.h" 32#include "clang/AST/NSAPI.h" 33#include "clang/Lex/ModuleLoader.h" 34#include "clang/Basic/Specifiers.h" 35#include "clang/Basic/TemplateKinds.h" 36#include "clang/Basic/TypeTraits.h" 37#include "clang/Basic/ExpressionTraits.h" 38#include "llvm/ADT/ArrayRef.h" 39#include "llvm/ADT/OwningPtr.h" 40#include "llvm/ADT/SmallPtrSet.h" 41#include "llvm/ADT/SmallVector.h" 42#include <deque> 43#include <string> 44 45namespace llvm { 46 class APSInt; 47 template <typename ValueT> struct DenseMapInfo; 48 template <typename ValueT, typename ValueInfoT> class DenseSet; 49 class SmallBitVector; 50} 51 52namespace clang { 53 class ADLResult; 54 class ASTConsumer; 55 class ASTContext; 56 class ASTMutationListener; 57 class ASTReader; 58 class ASTWriter; 59 class ArrayType; 60 class AttributeList; 61 class BlockDecl; 62 class CXXBasePath; 63 class CXXBasePaths; 64 class CXXBindTemporaryExpr; 65 typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 66 class CXXConstructorDecl; 67 class CXXConversionDecl; 68 class CXXDestructorDecl; 69 class CXXFieldCollector; 70 class CXXMemberCallExpr; 71 class CXXMethodDecl; 72 class CXXScopeSpec; 73 class CXXTemporary; 74 class CXXTryStmt; 75 class CallExpr; 76 class ClassTemplateDecl; 77 class ClassTemplatePartialSpecializationDecl; 78 class ClassTemplateSpecializationDecl; 79 class CodeCompleteConsumer; 80 class CodeCompletionAllocator; 81 class CodeCompletionTUInfo; 82 class CodeCompletionResult; 83 class Decl; 84 class DeclAccessPair; 85 class DeclContext; 86 class DeclRefExpr; 87 class DeclaratorDecl; 88 class DeducedTemplateArgument; 89 class DependentDiagnostic; 90 class DesignatedInitExpr; 91 class Designation; 92 class EnumConstantDecl; 93 class Expr; 94 class ExtVectorType; 95 class ExternalSemaSource; 96 class FormatAttr; 97 class FriendDecl; 98 class FunctionDecl; 99 class FunctionProtoType; 100 class FunctionTemplateDecl; 101 class ImplicitConversionSequence; 102 class InitListExpr; 103 class InitializationKind; 104 class InitializationSequence; 105 class InitializedEntity; 106 class IntegerLiteral; 107 class LabelStmt; 108 class LambdaExpr; 109 class LangOptions; 110 class LocalInstantiationScope; 111 class LookupResult; 112 class MacroInfo; 113 class MultiLevelTemplateArgumentList; 114 class NamedDecl; 115 class NonNullAttr; 116 class ObjCCategoryDecl; 117 class ObjCCategoryImplDecl; 118 class ObjCCompatibleAliasDecl; 119 class ObjCContainerDecl; 120 class ObjCImplDecl; 121 class ObjCImplementationDecl; 122 class ObjCInterfaceDecl; 123 class ObjCIvarDecl; 124 template <class T> class ObjCList; 125 class ObjCMessageExpr; 126 class ObjCMethodDecl; 127 class ObjCPropertyDecl; 128 class ObjCProtocolDecl; 129 class OverloadCandidateSet; 130 class OverloadExpr; 131 class ParenListExpr; 132 class ParmVarDecl; 133 class Preprocessor; 134 class PseudoDestructorTypeStorage; 135 class PseudoObjectExpr; 136 class QualType; 137 class StandardConversionSequence; 138 class Stmt; 139 class StringLiteral; 140 class SwitchStmt; 141 class TargetAttributesSema; 142 class TemplateArgument; 143 class TemplateArgumentList; 144 class TemplateArgumentLoc; 145 class TemplateDecl; 146 class TemplateParameterList; 147 class TemplatePartialOrderingContext; 148 class TemplateTemplateParmDecl; 149 class Token; 150 class TypeAliasDecl; 151 class TypedefDecl; 152 class TypedefNameDecl; 153 class TypeLoc; 154 class UnqualifiedId; 155 class UnresolvedLookupExpr; 156 class UnresolvedMemberExpr; 157 class UnresolvedSetImpl; 158 class UnresolvedSetIterator; 159 class UsingDecl; 160 class UsingShadowDecl; 161 class ValueDecl; 162 class VarDecl; 163 class VisibilityAttr; 164 class VisibleDeclConsumer; 165 class IndirectFieldDecl; 166 167namespace sema { 168 class AccessedEntity; 169 class BlockScopeInfo; 170 class CompoundScopeInfo; 171 class DelayedDiagnostic; 172 class FunctionScopeInfo; 173 class LambdaScopeInfo; 174 class PossiblyUnreachableDiag; 175 class TemplateDeductionInfo; 176} 177 178// FIXME: No way to easily map from TemplateTypeParmTypes to 179// TemplateTypeParmDecls, so we have this horrible PointerUnion. 180typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 181 SourceLocation> UnexpandedParameterPack; 182 183/// Sema - This implements semantic analysis and AST building for C. 184class Sema { 185 Sema(const Sema&); // DO NOT IMPLEMENT 186 void operator=(const Sema&); // DO NOT IMPLEMENT 187 mutable const TargetAttributesSema* TheTargetAttributesSema; 188public: 189 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 190 typedef OpaquePtr<TemplateName> TemplateTy; 191 typedef OpaquePtr<QualType> TypeTy; 192 193 OpenCLOptions OpenCLFeatures; 194 FPOptions FPFeatures; 195 196 const LangOptions &LangOpts; 197 Preprocessor &PP; 198 ASTContext &Context; 199 ASTConsumer &Consumer; 200 DiagnosticsEngine &Diags; 201 SourceManager &SourceMgr; 202 203 /// \brief Flag indicating whether or not to collect detailed statistics. 204 bool CollectStats; 205 206 /// \brief Source of additional semantic information. 207 ExternalSemaSource *ExternalSource; 208 209 /// \brief Code-completion consumer. 210 CodeCompleteConsumer *CodeCompleter; 211 212 /// CurContext - This is the current declaration context of parsing. 213 DeclContext *CurContext; 214 215 /// \brief Generally null except when we temporarily switch decl contexts, 216 /// like in \see ActOnObjCTemporaryExitContainerContext. 217 DeclContext *OriginalLexicalContext; 218 219 /// VAListTagName - The declaration name corresponding to __va_list_tag. 220 /// This is used as part of a hack to omit that class from ADL results. 221 DeclarationName VAListTagName; 222 223 /// PackContext - Manages the stack for #pragma pack. An alignment 224 /// of 0 indicates default alignment. 225 void *PackContext; // Really a "PragmaPackStack*" 226 227 bool MSStructPragmaOn; // True when #pragma ms_struct on 228 229 /// VisContext - Manages the stack for #pragma GCC visibility. 230 void *VisContext; // Really a "PragmaVisStack*" 231 232 /// ExprNeedsCleanups - True if the current evaluation context 233 /// requires cleanups to be run at its conclusion. 234 bool ExprNeedsCleanups; 235 236 /// ExprCleanupObjects - This is the stack of objects requiring 237 /// cleanup that are created by the current full expression. The 238 /// element type here is ExprWithCleanups::Object. 239 SmallVector<BlockDecl*, 8> ExprCleanupObjects; 240 241 llvm::SmallPtrSet<Expr*, 8> MaybeODRUseExprs; 242 243 /// \brief Stack containing information about each of the nested 244 /// function, block, and method scopes that are currently active. 245 /// 246 /// This array is never empty. Clients should ignore the first 247 /// element, which is used to cache a single FunctionScopeInfo 248 /// that's used to parse every top-level function. 249 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 250 251 typedef LazyVector<TypedefNameDecl *, ExternalSemaSource, 252 &ExternalSemaSource::ReadExtVectorDecls, 2, 2> 253 ExtVectorDeclsType; 254 255 /// ExtVectorDecls - This is a list all the extended vector types. This allows 256 /// us to associate a raw vector type with one of the ext_vector type names. 257 /// This is only necessary for issuing pretty diagnostics. 258 ExtVectorDeclsType ExtVectorDecls; 259 260 /// \brief The set of types for which we have already complained about the 261 /// definitions being hidden. 262 /// 263 /// This set is used to suppress redundant diagnostics. 264 llvm::SmallPtrSet<NamedDecl *, 4> HiddenDefinitions; 265 266 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 267 OwningPtr<CXXFieldCollector> FieldCollector; 268 269 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 270 271 /// PureVirtualClassDiagSet - a set of class declarations which we have 272 /// emitted a list of pure virtual functions. Used to prevent emitting the 273 /// same list more than once. 274 OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 275 276 /// ParsingInitForAutoVars - a set of declarations with auto types for which 277 /// we are currently parsing the initializer. 278 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 279 280 /// \brief A mapping from external names to the most recent 281 /// locally-scoped external declaration with that name. 282 /// 283 /// This map contains external declarations introduced in local 284 /// scoped, e.g., 285 /// 286 /// \code 287 /// void f() { 288 /// void foo(int, int); 289 /// } 290 /// \endcode 291 /// 292 /// Here, the name "foo" will be associated with the declaration on 293 /// "foo" within f. This name is not visible outside of 294 /// "f". However, we still find it in two cases: 295 /// 296 /// - If we are declaring another external with the name "foo", we 297 /// can find "foo" as a previous declaration, so that the types 298 /// of this external declaration can be checked for 299 /// compatibility. 300 /// 301 /// - If we would implicitly declare "foo" (e.g., due to a call to 302 /// "foo" in C when no prototype or definition is visible), then 303 /// we find this declaration of "foo" and complain that it is 304 /// not visible. 305 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 306 307 /// \brief Look for a locally scoped external declaration by the given name. 308 llvm::DenseMap<DeclarationName, NamedDecl *>::iterator 309 findLocallyScopedExternalDecl(DeclarationName Name); 310 311 typedef LazyVector<VarDecl *, ExternalSemaSource, 312 &ExternalSemaSource::ReadTentativeDefinitions, 2, 2> 313 TentativeDefinitionsType; 314 315 /// \brief All the tentative definitions encountered in the TU. 316 TentativeDefinitionsType TentativeDefinitions; 317 318 typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource, 319 &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2> 320 UnusedFileScopedDeclsType; 321 322 /// \brief The set of file scoped decls seen so far that have not been used 323 /// and must warn if not used. Only contains the first declaration. 324 UnusedFileScopedDeclsType UnusedFileScopedDecls; 325 326 typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource, 327 &ExternalSemaSource::ReadDelegatingConstructors, 2, 2> 328 DelegatingCtorDeclsType; 329 330 /// \brief All the delegating constructors seen so far in the file, used for 331 /// cycle detection at the end of the TU. 332 DelegatingCtorDeclsType DelegatingCtorDecls; 333 334 /// \brief All the overriding destructors seen during a class definition 335 /// (there could be multiple due to nested classes) that had their exception 336 /// spec checks delayed, plus the overridden destructor. 337 SmallVector<std::pair<const CXXDestructorDecl*, 338 const CXXDestructorDecl*>, 2> 339 DelayedDestructorExceptionSpecChecks; 340 341 /// \brief Callback to the parser to parse templated functions when needed. 342 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 343 LateTemplateParserCB *LateTemplateParser; 344 void *OpaqueParser; 345 346 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 347 LateTemplateParser = LTP; 348 OpaqueParser = P; 349 } 350 351 class DelayedDiagnostics; 352 353 class ParsingDeclState { 354 unsigned SavedStackSize; 355 friend class Sema::DelayedDiagnostics; 356 }; 357 358 class ProcessingContextState { 359 unsigned SavedParsingDepth; 360 unsigned SavedActiveStackBase; 361 friend class Sema::DelayedDiagnostics; 362 }; 363 364 /// A class which encapsulates the logic for delaying diagnostics 365 /// during parsing and other processing. 366 class DelayedDiagnostics { 367 /// \brief The stack of diagnostics that were delayed due to being 368 /// produced during the parsing of a declaration. 369 sema::DelayedDiagnostic *Stack; 370 371 /// \brief The number of objects on the delayed-diagnostics stack. 372 unsigned StackSize; 373 374 /// \brief The current capacity of the delayed-diagnostics stack. 375 unsigned StackCapacity; 376 377 /// \brief The index of the first "active" delayed diagnostic in 378 /// the stack. When parsing class definitions, we ignore active 379 /// delayed diagnostics from the surrounding context. 380 unsigned ActiveStackBase; 381 382 /// \brief The depth of the declarations we're currently parsing. 383 /// This gets saved and reset whenever we enter a class definition. 384 unsigned ParsingDepth; 385 386 public: 387 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 388 ActiveStackBase(0), ParsingDepth(0) {} 389 390 ~DelayedDiagnostics() { 391 delete[] reinterpret_cast<char*>(Stack); 392 } 393 394 /// Adds a delayed diagnostic. 395 void add(const sema::DelayedDiagnostic &diag); 396 397 /// Determines whether diagnostics should be delayed. 398 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 399 400 /// Observe that we've started parsing a declaration. Access and 401 /// deprecation diagnostics will be delayed; when the declaration 402 /// is completed, all active delayed diagnostics will be evaluated 403 /// in its context, and then active diagnostics stack will be 404 /// popped down to the saved depth. 405 ParsingDeclState pushParsingDecl() { 406 ParsingDepth++; 407 408 ParsingDeclState state; 409 state.SavedStackSize = StackSize; 410 return state; 411 } 412 413 /// Observe that we're completed parsing a declaration. 414 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 415 416 /// Observe that we've started processing a different context, the 417 /// contents of which are semantically separate from the 418 /// declarations it may lexically appear in. This sets aside the 419 /// current stack of active diagnostics and starts afresh. 420 ProcessingContextState pushContext() { 421 assert(StackSize >= ActiveStackBase); 422 423 ProcessingContextState state; 424 state.SavedParsingDepth = ParsingDepth; 425 state.SavedActiveStackBase = ActiveStackBase; 426 427 ActiveStackBase = StackSize; 428 ParsingDepth = 0; 429 430 return state; 431 } 432 433 /// Observe that we've stopped processing a context. This 434 /// restores the previous stack of active diagnostics. 435 void popContext(ProcessingContextState state) { 436 assert(ActiveStackBase == StackSize); 437 assert(ParsingDepth == 0); 438 ActiveStackBase = state.SavedActiveStackBase; 439 ParsingDepth = state.SavedParsingDepth; 440 } 441 } DelayedDiagnostics; 442 443 /// A RAII object to temporarily push a declaration context. 444 class ContextRAII { 445 private: 446 Sema &S; 447 DeclContext *SavedContext; 448 ProcessingContextState SavedContextState; 449 QualType SavedCXXThisTypeOverride; 450 451 public: 452 ContextRAII(Sema &S, DeclContext *ContextToPush) 453 : S(S), SavedContext(S.CurContext), 454 SavedContextState(S.DelayedDiagnostics.pushContext()), 455 SavedCXXThisTypeOverride(S.CXXThisTypeOverride) 456 { 457 assert(ContextToPush && "pushing null context"); 458 S.CurContext = ContextToPush; 459 } 460 461 void pop() { 462 if (!SavedContext) return; 463 S.CurContext = SavedContext; 464 S.DelayedDiagnostics.popContext(SavedContextState); 465 S.CXXThisTypeOverride = SavedCXXThisTypeOverride; 466 SavedContext = 0; 467 } 468 469 ~ContextRAII() { 470 pop(); 471 } 472 }; 473 474 /// WeakUndeclaredIdentifiers - Identifiers contained in 475 /// #pragma weak before declared. rare. may alias another 476 /// identifier, declared or undeclared 477 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 478 479 /// ExtnameUndeclaredIdentifiers - Identifiers contained in 480 /// #pragma redefine_extname before declared. Used in Solaris system headers 481 /// to define functions that occur in multiple standards to call the version 482 /// in the currently selected standard. 483 llvm::DenseMap<IdentifierInfo*,AsmLabelAttr*> ExtnameUndeclaredIdentifiers; 484 485 486 /// \brief Load weak undeclared identifiers from the external source. 487 void LoadExternalWeakUndeclaredIdentifiers(); 488 489 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 490 /// #pragma weak during processing of other Decls. 491 /// I couldn't figure out a clean way to generate these in-line, so 492 /// we store them here and handle separately -- which is a hack. 493 /// It would be best to refactor this. 494 SmallVector<Decl*,2> WeakTopLevelDecl; 495 496 IdentifierResolver IdResolver; 497 498 /// Translation Unit Scope - useful to Objective-C actions that need 499 /// to lookup file scope declarations in the "ordinary" C decl namespace. 500 /// For example, user-defined classes, built-in "id" type, etc. 501 Scope *TUScope; 502 503 /// \brief The C++ "std" namespace, where the standard library resides. 504 LazyDeclPtr StdNamespace; 505 506 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 507 /// standard library. 508 LazyDeclPtr StdBadAlloc; 509 510 /// \brief The C++ "std::initializer_list" template, which is defined in 511 /// <initializer_list>. 512 ClassTemplateDecl *StdInitializerList; 513 514 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 515 RecordDecl *CXXTypeInfoDecl; 516 517 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 518 RecordDecl *MSVCGuidDecl; 519 520 /// \brief Caches identifiers/selectors for NSFoundation APIs. 521 llvm::OwningPtr<NSAPI> NSAPIObj; 522 523 /// \brief The declaration of the Objective-C NSNumber class. 524 ObjCInterfaceDecl *NSNumberDecl; 525 526 /// \brief The Objective-C NSNumber methods used to create NSNumber literals. 527 ObjCMethodDecl *NSNumberLiteralMethods[NSAPI::NumNSNumberLiteralMethods]; 528 529 /// \brief The declaration of the Objective-C NSArray class. 530 ObjCInterfaceDecl *NSArrayDecl; 531 532 /// \brief The declaration of the arrayWithObjects:count: method. 533 ObjCMethodDecl *ArrayWithObjectsMethod; 534 535 /// \brief The declaration of the Objective-C NSDictionary class. 536 ObjCInterfaceDecl *NSDictionaryDecl; 537 538 /// \brief The declaration of the dictionaryWithObjects:forKeys:count: method. 539 ObjCMethodDecl *DictionaryWithObjectsMethod; 540 541 /// \brief id<NSCopying> type. 542 QualType QIDNSCopying; 543 544 /// A flag to remember whether the implicit forms of operator new and delete 545 /// have been declared. 546 bool GlobalNewDeleteDeclared; 547 548 /// A flag that is set when parsing a -dealloc method and no [super dealloc] 549 /// call was found yet. 550 bool ObjCShouldCallSuperDealloc; 551 /// A flag that is set when parsing a -finalize method and no [super finalize] 552 /// call was found yet. 553 bool ObjCShouldCallSuperFinalize; 554 555 /// \brief Describes how the expressions currently being parsed are 556 /// evaluated at run-time, if at all. 557 enum ExpressionEvaluationContext { 558 /// \brief The current expression and its subexpressions occur within an 559 /// unevaluated operand (C++11 [expr]p7), such as the subexpression of 560 /// \c sizeof, where the type of the expression may be significant but 561 /// no code will be generated to evaluate the value of the expression at 562 /// run time. 563 Unevaluated, 564 565 /// \brief The current context is "potentially evaluated" in C++11 terms, 566 /// but the expression is evaluated at compile-time (like the values of 567 /// cases in a switch statment). 568 ConstantEvaluated, 569 570 /// \brief The current expression is potentially evaluated at run time, 571 /// which means that code may be generated to evaluate the value of the 572 /// expression at run time. 573 PotentiallyEvaluated, 574 575 /// \brief The current expression is potentially evaluated, but any 576 /// declarations referenced inside that expression are only used if 577 /// in fact the current expression is used. 578 /// 579 /// This value is used when parsing default function arguments, for which 580 /// we would like to provide diagnostics (e.g., passing non-POD arguments 581 /// through varargs) but do not want to mark declarations as "referenced" 582 /// until the default argument is used. 583 PotentiallyEvaluatedIfUsed 584 }; 585 586 /// \brief Data structure used to record current or nested 587 /// expression evaluation contexts. 588 struct ExpressionEvaluationContextRecord { 589 /// \brief The expression evaluation context. 590 ExpressionEvaluationContext Context; 591 592 /// \brief Whether the enclosing context needed a cleanup. 593 bool ParentNeedsCleanups; 594 595 /// \brief Whether we are in a decltype expression. 596 bool IsDecltype; 597 598 /// \brief The number of active cleanup objects when we entered 599 /// this expression evaluation context. 600 unsigned NumCleanupObjects; 601 602 llvm::SmallPtrSet<Expr*, 8> SavedMaybeODRUseExprs; 603 604 /// \brief The lambdas that are present within this context, if it 605 /// is indeed an unevaluated context. 606 llvm::SmallVector<LambdaExpr *, 2> Lambdas; 607 608 /// \brief The declaration that provides context for the lambda expression 609 /// if the normal declaration context does not suffice, e.g., in a 610 /// default function argument. 611 Decl *LambdaContextDecl; 612 613 /// \brief The context information used to mangle lambda expressions 614 /// within this context. 615 /// 616 /// This mangling information is allocated lazily, since most contexts 617 /// do not have lambda expressions. 618 LambdaMangleContext *LambdaMangle; 619 620 /// \brief If we are processing a decltype type, a set of call expressions 621 /// for which we have deferred checking the completeness of the return type. 622 llvm::SmallVector<CallExpr*, 8> DelayedDecltypeCalls; 623 624 /// \brief If we are processing a decltype type, a set of temporary binding 625 /// expressions for which we have deferred checking the destructor. 626 llvm::SmallVector<CXXBindTemporaryExpr*, 8> DelayedDecltypeBinds; 627 628 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 629 unsigned NumCleanupObjects, 630 bool ParentNeedsCleanups, 631 Decl *LambdaContextDecl, 632 bool IsDecltype) 633 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups), 634 IsDecltype(IsDecltype), NumCleanupObjects(NumCleanupObjects), 635 LambdaContextDecl(LambdaContextDecl), LambdaMangle() { } 636 637 ~ExpressionEvaluationContextRecord() { 638 delete LambdaMangle; 639 } 640 641 /// \brief Retrieve the mangling context for lambdas. 642 LambdaMangleContext &getLambdaMangleContext() { 643 assert(LambdaContextDecl && "Need to have a lambda context declaration"); 644 if (!LambdaMangle) 645 LambdaMangle = new LambdaMangleContext; 646 return *LambdaMangle; 647 } 648 }; 649 650 /// A stack of expression evaluation contexts. 651 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 652 653 /// SpecialMemberOverloadResult - The overloading result for a special member 654 /// function. 655 /// 656 /// This is basically a wrapper around PointerIntPair. The lowest bit of the 657 /// integer is used to determine whether we have a parameter qualification 658 /// match, the second-lowest is whether we had success in resolving the 659 /// overload to a unique non-deleted function. 660 /// 661 /// The ConstParamMatch bit represents whether, when looking up a copy 662 /// constructor or assignment operator, we found a potential copy 663 /// constructor/assignment operator whose first parameter is const-qualified. 664 /// This is used for determining parameter types of other objects and is 665 /// utterly meaningless on other types of special members. 666 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 667 public: 668 enum Kind { 669 NoMemberOrDeleted, 670 Ambiguous, 671 SuccessNonConst, 672 SuccessConst 673 }; 674 675 private: 676 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 677 678 public: 679 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 680 : FastFoldingSetNode(ID) 681 {} 682 683 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 684 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 685 686 Kind getKind() const { return static_cast<Kind>(Pair.getInt()); } 687 void setKind(Kind K) { Pair.setInt(K); } 688 689 bool hasSuccess() const { return getKind() >= SuccessNonConst; } 690 bool hasConstParamMatch() const { return getKind() == SuccessConst; } 691 }; 692 693 /// \brief A cache of special member function overload resolution results 694 /// for C++ records. 695 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 696 697 /// \brief The kind of translation unit we are processing. 698 /// 699 /// When we're processing a complete translation unit, Sema will perform 700 /// end-of-translation-unit semantic tasks (such as creating 701 /// initializers for tentative definitions in C) once parsing has 702 /// completed. Modules and precompiled headers perform different kinds of 703 /// checks. 704 TranslationUnitKind TUKind; 705 706 llvm::BumpPtrAllocator BumpAlloc; 707 708 /// \brief The number of SFINAE diagnostics that have been trapped. 709 unsigned NumSFINAEErrors; 710 711 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> > 712 UnparsedDefaultArgInstantiationsMap; 713 714 /// \brief A mapping from parameters with unparsed default arguments to the 715 /// set of instantiations of each parameter. 716 /// 717 /// This mapping is a temporary data structure used when parsing 718 /// nested class templates or nested classes of class templates, 719 /// where we might end up instantiating an inner class before the 720 /// default arguments of its methods have been parsed. 721 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 722 723 // Contains the locations of the beginning of unparsed default 724 // argument locations. 725 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 726 727 /// UndefinedInternals - all the used, undefined objects with 728 /// internal linkage in this translation unit. 729 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 730 731 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 732 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 733 734 /// Method Pool - allows efficient lookup when typechecking messages to "id". 735 /// We need to maintain a list, since selectors can have differing signatures 736 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 737 /// of selectors are "overloaded"). 738 GlobalMethodPool MethodPool; 739 740 /// Method selectors used in a @selector expression. Used for implementation 741 /// of -Wselector. 742 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 743 744 void ReadMethodPool(Selector Sel); 745 746 /// Private Helper predicate to check for 'self'. 747 bool isSelfExpr(Expr *RExpr); 748 749 /// \brief Cause the active diagnostic on the DiagosticsEngine to be 750 /// emitted. This is closely coupled to the SemaDiagnosticBuilder class and 751 /// should not be used elsewhere. 752 void EmitCurrentDiagnostic(unsigned DiagID); 753 754public: 755 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 756 TranslationUnitKind TUKind = TU_Complete, 757 CodeCompleteConsumer *CompletionConsumer = 0); 758 ~Sema(); 759 760 /// \brief Perform initialization that occurs after the parser has been 761 /// initialized but before it parses anything. 762 void Initialize(); 763 764 const LangOptions &getLangOpts() const { return LangOpts; } 765 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 766 FPOptions &getFPOptions() { return FPFeatures; } 767 768 DiagnosticsEngine &getDiagnostics() const { return Diags; } 769 SourceManager &getSourceManager() const { return SourceMgr; } 770 const TargetAttributesSema &getTargetAttributesSema() const; 771 Preprocessor &getPreprocessor() const { return PP; } 772 ASTContext &getASTContext() const { return Context; } 773 ASTConsumer &getASTConsumer() const { return Consumer; } 774 ASTMutationListener *getASTMutationListener() const; 775 776 void PrintStats() const; 777 778 /// \brief Helper class that creates diagnostics with optional 779 /// template instantiation stacks. 780 /// 781 /// This class provides a wrapper around the basic DiagnosticBuilder 782 /// class that emits diagnostics. SemaDiagnosticBuilder is 783 /// responsible for emitting the diagnostic (as DiagnosticBuilder 784 /// does) and, if the diagnostic comes from inside a template 785 /// instantiation, printing the template instantiation stack as 786 /// well. 787 class SemaDiagnosticBuilder : public DiagnosticBuilder { 788 Sema &SemaRef; 789 unsigned DiagID; 790 791 public: 792 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 793 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 794 795 ~SemaDiagnosticBuilder() { 796 // If we aren't active, there is nothing to do. 797 if (!isActive()) return; 798 799 // Otherwise, we need to emit the diagnostic. First flush the underlying 800 // DiagnosticBuilder data, and clear the diagnostic builder itself so it 801 // won't emit the diagnostic in its own destructor. 802 // 803 // This seems wasteful, in that as written the DiagnosticBuilder dtor will 804 // do its own needless checks to see if the diagnostic needs to be 805 // emitted. However, because we take care to ensure that the builder 806 // objects never escape, a sufficiently smart compiler will be able to 807 // eliminate that code. 808 FlushCounts(); 809 Clear(); 810 811 // Dispatch to Sema to emit the diagnostic. 812 SemaRef.EmitCurrentDiagnostic(DiagID); 813 } 814 }; 815 816 /// \brief Emit a diagnostic. 817 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID) { 818 DiagnosticBuilder DB = Diags.Report(Loc, DiagID); 819 return SemaDiagnosticBuilder(DB, *this, DiagID); 820 } 821 822 /// \brief Emit a partial diagnostic. 823 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 824 825 /// \brief Build a partial diagnostic. 826 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 827 828 bool findMacroSpelling(SourceLocation &loc, StringRef name); 829 830 /// \brief Get a string to suggest for zero-initialization of a type. 831 const char *getFixItZeroInitializerForType(QualType T) const; 832 833 ExprResult Owned(Expr* E) { return E; } 834 ExprResult Owned(ExprResult R) { return R; } 835 StmtResult Owned(Stmt* S) { return S; } 836 837 void ActOnEndOfTranslationUnit(); 838 839 void CheckDelegatingCtorCycles(); 840 841 Scope *getScopeForContext(DeclContext *Ctx); 842 843 void PushFunctionScope(); 844 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 845 void PushLambdaScope(CXXRecordDecl *Lambda, CXXMethodDecl *CallOperator); 846 void PopFunctionScopeInfo(const sema::AnalysisBasedWarnings::Policy *WP =0, 847 const Decl *D = 0, const BlockExpr *blkExpr = 0); 848 849 sema::FunctionScopeInfo *getCurFunction() const { 850 return FunctionScopes.back(); 851 } 852 853 void PushCompoundScope(); 854 void PopCompoundScope(); 855 856 sema::CompoundScopeInfo &getCurCompoundScope() const; 857 858 bool hasAnyUnrecoverableErrorsInThisFunction() const; 859 860 /// \brief Retrieve the current block, if any. 861 sema::BlockScopeInfo *getCurBlock(); 862 863 /// \brief Retrieve the current lambda expression, if any. 864 sema::LambdaScopeInfo *getCurLambda(); 865 866 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 867 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 868 869 //===--------------------------------------------------------------------===// 870 // Type Analysis / Processing: SemaType.cpp. 871 // 872 873 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 874 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 875 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 876 } 877 QualType BuildPointerType(QualType T, 878 SourceLocation Loc, DeclarationName Entity); 879 QualType BuildReferenceType(QualType T, bool LValueRef, 880 SourceLocation Loc, DeclarationName Entity); 881 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 882 Expr *ArraySize, unsigned Quals, 883 SourceRange Brackets, DeclarationName Entity); 884 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 885 SourceLocation AttrLoc); 886 QualType BuildFunctionType(QualType T, 887 QualType *ParamTypes, unsigned NumParamTypes, 888 bool Variadic, bool HasTrailingReturn, 889 unsigned Quals, RefQualifierKind RefQualifier, 890 SourceLocation Loc, DeclarationName Entity, 891 FunctionType::ExtInfo Info); 892 QualType BuildMemberPointerType(QualType T, QualType Class, 893 SourceLocation Loc, 894 DeclarationName Entity); 895 QualType BuildBlockPointerType(QualType T, 896 SourceLocation Loc, DeclarationName Entity); 897 QualType BuildParenType(QualType T); 898 QualType BuildAtomicType(QualType T, SourceLocation Loc); 899 900 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); 901 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); 902 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 903 TypeSourceInfo *ReturnTypeInfo); 904 905 /// \brief Package the given type and TSI into a ParsedType. 906 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 907 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 908 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 909 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 910 CanThrowResult canThrow(const Expr *E); 911 const FunctionProtoType *ResolveExceptionSpec(SourceLocation Loc, 912 const FunctionProtoType *FPT); 913 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 914 bool CheckDistantExceptionSpec(QualType T); 915 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 916 bool CheckEquivalentExceptionSpec( 917 const FunctionProtoType *Old, SourceLocation OldLoc, 918 const FunctionProtoType *New, SourceLocation NewLoc); 919 bool CheckEquivalentExceptionSpec( 920 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 921 const FunctionProtoType *Old, SourceLocation OldLoc, 922 const FunctionProtoType *New, SourceLocation NewLoc, 923 bool *MissingExceptionSpecification = 0, 924 bool *MissingEmptyExceptionSpecification = 0, 925 bool AllowNoexceptAllMatchWithNoSpec = false, 926 bool IsOperatorNew = false); 927 bool CheckExceptionSpecSubset( 928 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 929 const FunctionProtoType *Superset, SourceLocation SuperLoc, 930 const FunctionProtoType *Subset, SourceLocation SubLoc); 931 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 932 const FunctionProtoType *Target, SourceLocation TargetLoc, 933 const FunctionProtoType *Source, SourceLocation SourceLoc); 934 935 TypeResult ActOnTypeName(Scope *S, Declarator &D); 936 937 /// \brief The parser has parsed the context-sensitive type 'instancetype' 938 /// in an Objective-C message declaration. Return the appropriate type. 939 ParsedType ActOnObjCInstanceType(SourceLocation Loc); 940 941 bool RequireCompleteType(SourceLocation Loc, QualType T, 942 const PartialDiagnostic &PD, 943 std::pair<SourceLocation, PartialDiagnostic> Note); 944 bool RequireCompleteType(SourceLocation Loc, QualType T, 945 const PartialDiagnostic &PD); 946 bool RequireCompleteType(SourceLocation Loc, QualType T, 947 unsigned DiagID); 948 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 949 std::pair<SourceLocation, 950 PartialDiagnostic> Note); 951 952 bool RequireLiteralType(SourceLocation Loc, QualType T, 953 const PartialDiagnostic &PD); 954 955 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 956 const CXXScopeSpec &SS, QualType T); 957 958 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 959 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 960 QualType BuildUnaryTransformType(QualType BaseType, 961 UnaryTransformType::UTTKind UKind, 962 SourceLocation Loc); 963 964 //===--------------------------------------------------------------------===// 965 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 966 // 967 968 /// List of decls defined in a function prototype. This contains EnumConstants 969 /// that incorrectly end up in translation unit scope because there is no 970 /// function to pin them on. ActOnFunctionDeclarator reads this list and patches 971 /// them into the FunctionDecl. 972 std::vector<NamedDecl*> DeclsInPrototypeScope; 973 /// Nonzero if we are currently parsing a function declarator. This is a counter 974 /// as opposed to a boolean so we can deal with nested function declarators 975 /// such as: 976 /// void f(void (*g)(), ...) 977 unsigned InFunctionDeclarator; 978 979 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 980 981 void DiagnoseUseOfUnimplementedSelectors(); 982 983 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 984 Scope *S, CXXScopeSpec *SS = 0, 985 bool isClassName = false, 986 bool HasTrailingDot = false, 987 ParsedType ObjectType = ParsedType(), 988 bool IsCtorOrDtorName = false, 989 bool WantNontrivialTypeSourceInfo = false, 990 IdentifierInfo **CorrectedII = 0); 991 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 992 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS, Scope *S); 993 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 994 SourceLocation IILoc, 995 Scope *S, 996 CXXScopeSpec *SS, 997 ParsedType &SuggestedType); 998 999 /// \brief Describes the result of the name lookup and resolution performed 1000 /// by \c ClassifyName(). 1001 enum NameClassificationKind { 1002 NC_Unknown, 1003 NC_Error, 1004 NC_Keyword, 1005 NC_Type, 1006 NC_Expression, 1007 NC_NestedNameSpecifier, 1008 NC_TypeTemplate, 1009 NC_FunctionTemplate 1010 }; 1011 1012 class NameClassification { 1013 NameClassificationKind Kind; 1014 ExprResult Expr; 1015 TemplateName Template; 1016 ParsedType Type; 1017 const IdentifierInfo *Keyword; 1018 1019 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 1020 1021 public: 1022 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 1023 1024 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 1025 1026 NameClassification(const IdentifierInfo *Keyword) 1027 : Kind(NC_Keyword), Keyword(Keyword) { } 1028 1029 static NameClassification Error() { 1030 return NameClassification(NC_Error); 1031 } 1032 1033 static NameClassification Unknown() { 1034 return NameClassification(NC_Unknown); 1035 } 1036 1037 static NameClassification NestedNameSpecifier() { 1038 return NameClassification(NC_NestedNameSpecifier); 1039 } 1040 1041 static NameClassification TypeTemplate(TemplateName Name) { 1042 NameClassification Result(NC_TypeTemplate); 1043 Result.Template = Name; 1044 return Result; 1045 } 1046 1047 static NameClassification FunctionTemplate(TemplateName Name) { 1048 NameClassification Result(NC_FunctionTemplate); 1049 Result.Template = Name; 1050 return Result; 1051 } 1052 1053 NameClassificationKind getKind() const { return Kind; } 1054 1055 ParsedType getType() const { 1056 assert(Kind == NC_Type); 1057 return Type; 1058 } 1059 1060 ExprResult getExpression() const { 1061 assert(Kind == NC_Expression); 1062 return Expr; 1063 } 1064 1065 TemplateName getTemplateName() const { 1066 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 1067 return Template; 1068 } 1069 1070 TemplateNameKind getTemplateNameKind() const { 1071 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 1072 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 1073 } 1074}; 1075 1076 /// \brief Perform name lookup on the given name, classifying it based on 1077 /// the results of name lookup and the following token. 1078 /// 1079 /// This routine is used by the parser to resolve identifiers and help direct 1080 /// parsing. When the identifier cannot be found, this routine will attempt 1081 /// to correct the typo and classify based on the resulting name. 1082 /// 1083 /// \param S The scope in which we're performing name lookup. 1084 /// 1085 /// \param SS The nested-name-specifier that precedes the name. 1086 /// 1087 /// \param Name The identifier. If typo correction finds an alternative name, 1088 /// this pointer parameter will be updated accordingly. 1089 /// 1090 /// \param NameLoc The location of the identifier. 1091 /// 1092 /// \param NextToken The token following the identifier. Used to help 1093 /// disambiguate the name. 1094 NameClassification ClassifyName(Scope *S, 1095 CXXScopeSpec &SS, 1096 IdentifierInfo *&Name, 1097 SourceLocation NameLoc, 1098 const Token &NextToken); 1099 1100 Decl *ActOnDeclarator(Scope *S, Declarator &D); 1101 1102 Decl *HandleDeclarator(Scope *S, Declarator &D, 1103 MultiTemplateParamsArg TemplateParameterLists); 1104 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 1105 const LookupResult &Previous, 1106 Scope *S); 1107 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 1108 bool diagnoseQualifiedDeclaration(CXXScopeSpec &SS, DeclContext *DC, 1109 DeclarationName Name, 1110 SourceLocation Loc); 1111 void DiagnoseFunctionSpecifiers(Declarator& D); 1112 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 1113 void CheckShadow(Scope *S, VarDecl *D); 1114 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 1115 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 1116 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1117 TypeSourceInfo *TInfo, 1118 LookupResult &Previous); 1119 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 1120 LookupResult &Previous, bool &Redeclaration); 1121 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1122 TypeSourceInfo *TInfo, 1123 LookupResult &Previous, 1124 MultiTemplateParamsArg TemplateParamLists); 1125 // Returns true if the variable declaration is a redeclaration 1126 bool CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous); 1127 void CheckCompleteVariableDeclaration(VarDecl *var); 1128 void ActOnStartFunctionDeclarator(); 1129 void ActOnEndFunctionDeclarator(); 1130 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1131 TypeSourceInfo *TInfo, 1132 LookupResult &Previous, 1133 MultiTemplateParamsArg TemplateParamLists, 1134 bool &AddToScope); 1135 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1136 1137 bool CheckConstexprFunctionDecl(const FunctionDecl *FD); 1138 bool CheckConstexprFunctionBody(const FunctionDecl *FD, Stmt *Body); 1139 1140 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1141 // Returns true if the function declaration is a redeclaration 1142 bool CheckFunctionDeclaration(Scope *S, 1143 FunctionDecl *NewFD, LookupResult &Previous, 1144 bool IsExplicitSpecialization); 1145 void CheckMain(FunctionDecl *FD, const DeclSpec &D); 1146 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1147 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1148 SourceLocation Loc, 1149 QualType T); 1150 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1151 SourceLocation NameLoc, IdentifierInfo *Name, 1152 QualType T, TypeSourceInfo *TSInfo, 1153 StorageClass SC, StorageClass SCAsWritten); 1154 void ActOnParamDefaultArgument(Decl *param, 1155 SourceLocation EqualLoc, 1156 Expr *defarg); 1157 void ActOnParamUnparsedDefaultArgument(Decl *param, 1158 SourceLocation EqualLoc, 1159 SourceLocation ArgLoc); 1160 void ActOnParamDefaultArgumentError(Decl *param); 1161 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1162 SourceLocation EqualLoc); 1163 1164 void CheckSelfReference(Decl *OrigDecl, Expr *E); 1165 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1166 bool TypeMayContainAuto); 1167 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1168 void ActOnInitializerError(Decl *Dcl); 1169 void ActOnCXXForRangeDecl(Decl *D); 1170 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1171 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1172 void FinalizeDeclaration(Decl *D); 1173 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1174 Decl **Group, 1175 unsigned NumDecls); 1176 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1177 bool TypeMayContainAuto = true); 1178 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1179 SourceLocation LocAfterDecls); 1180 void CheckForFunctionRedefinition(FunctionDecl *FD); 1181 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1182 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1183 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1184 1185 void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope); 1186 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1187 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1188 1189 /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an 1190 /// attribute for which parsing is delayed. 1191 void ActOnFinishDelayedAttribute(Scope *S, Decl *D, ParsedAttributes &Attrs); 1192 1193 /// \brief Diagnose any unused parameters in the given sequence of 1194 /// ParmVarDecl pointers. 1195 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1196 ParmVarDecl * const *End); 1197 1198 /// \brief Diagnose whether the size of parameters or return value of a 1199 /// function or obj-c method definition is pass-by-value and larger than a 1200 /// specified threshold. 1201 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1202 ParmVarDecl * const *End, 1203 QualType ReturnTy, 1204 NamedDecl *D); 1205 1206 void DiagnoseInvalidJumps(Stmt *Body); 1207 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1208 SourceLocation AsmLoc, 1209 SourceLocation RParenLoc); 1210 1211 /// \brief The parser has processed a module import declaration. 1212 /// 1213 /// \param AtLoc The location of the '@' symbol, if any. 1214 /// 1215 /// \param ImportLoc The location of the 'import' keyword. 1216 /// 1217 /// \param Path The module access path. 1218 DeclResult ActOnModuleImport(SourceLocation AtLoc, SourceLocation ImportLoc, 1219 ModuleIdPath Path); 1220 1221 /// \brief Retrieve a suitable printing policy. 1222 PrintingPolicy getPrintingPolicy() const { 1223 return getPrintingPolicy(Context, PP); 1224 } 1225 1226 /// \brief Retrieve a suitable printing policy. 1227 static PrintingPolicy getPrintingPolicy(const ASTContext &Ctx, 1228 const Preprocessor &PP); 1229 1230 /// Scope actions. 1231 void ActOnPopScope(SourceLocation Loc, Scope *S); 1232 void ActOnTranslationUnitScope(Scope *S); 1233 1234 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1235 DeclSpec &DS); 1236 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1237 DeclSpec &DS, 1238 MultiTemplateParamsArg TemplateParams); 1239 1240 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1241 AccessSpecifier AS, 1242 RecordDecl *Record); 1243 1244 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1245 RecordDecl *Record); 1246 1247 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1248 TagTypeKind NewTag, bool isDefinition, 1249 SourceLocation NewTagLoc, 1250 const IdentifierInfo &Name); 1251 1252 enum TagUseKind { 1253 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1254 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1255 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1256 TUK_Friend // Friend declaration: 'friend struct foo;' 1257 }; 1258 1259 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1260 SourceLocation KWLoc, CXXScopeSpec &SS, 1261 IdentifierInfo *Name, SourceLocation NameLoc, 1262 AttributeList *Attr, AccessSpecifier AS, 1263 SourceLocation ModulePrivateLoc, 1264 MultiTemplateParamsArg TemplateParameterLists, 1265 bool &OwnedDecl, bool &IsDependent, 1266 SourceLocation ScopedEnumKWLoc, 1267 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1268 1269 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1270 unsigned TagSpec, SourceLocation TagLoc, 1271 CXXScopeSpec &SS, 1272 IdentifierInfo *Name, SourceLocation NameLoc, 1273 AttributeList *Attr, 1274 MultiTemplateParamsArg TempParamLists); 1275 1276 TypeResult ActOnDependentTag(Scope *S, 1277 unsigned TagSpec, 1278 TagUseKind TUK, 1279 const CXXScopeSpec &SS, 1280 IdentifierInfo *Name, 1281 SourceLocation TagLoc, 1282 SourceLocation NameLoc); 1283 1284 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1285 IdentifierInfo *ClassName, 1286 SmallVectorImpl<Decl *> &Decls); 1287 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1288 Declarator &D, Expr *BitfieldWidth); 1289 1290 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1291 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1292 AccessSpecifier AS); 1293 1294 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1295 TypeSourceInfo *TInfo, 1296 RecordDecl *Record, SourceLocation Loc, 1297 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1298 SourceLocation TSSL, 1299 AccessSpecifier AS, NamedDecl *PrevDecl, 1300 Declarator *D = 0); 1301 1302 enum CXXSpecialMember { 1303 CXXDefaultConstructor, 1304 CXXCopyConstructor, 1305 CXXMoveConstructor, 1306 CXXCopyAssignment, 1307 CXXMoveAssignment, 1308 CXXDestructor, 1309 CXXInvalid 1310 }; 1311 bool CheckNontrivialField(FieldDecl *FD); 1312 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1313 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1314 void ActOnLastBitfield(SourceLocation DeclStart, 1315 SmallVectorImpl<Decl *> &AllIvarDecls); 1316 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, 1317 Declarator &D, Expr *BitfieldWidth, 1318 tok::ObjCKeywordKind visibility); 1319 1320 // This is used for both record definitions and ObjC interface declarations. 1321 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1322 llvm::ArrayRef<Decl *> Fields, 1323 SourceLocation LBrac, SourceLocation RBrac, 1324 AttributeList *AttrList); 1325 1326 /// ActOnTagStartDefinition - Invoked when we have entered the 1327 /// scope of a tag's definition (e.g., for an enumeration, class, 1328 /// struct, or union). 1329 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1330 1331 Decl *ActOnObjCContainerStartDefinition(Decl *IDecl); 1332 1333 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1334 /// C++ record definition's base-specifiers clause and are starting its 1335 /// member declarations. 1336 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1337 SourceLocation FinalLoc, 1338 SourceLocation LBraceLoc); 1339 1340 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1341 /// the definition of a tag (enumeration, class, struct, or union). 1342 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1343 SourceLocation RBraceLoc); 1344 1345 void ActOnObjCContainerFinishDefinition(); 1346 1347 /// \brief Invoked when we must temporarily exit the objective-c container 1348 /// scope for parsing/looking-up C constructs. 1349 /// 1350 /// Must be followed by a call to \see ActOnObjCReenterContainerContext 1351 void ActOnObjCTemporaryExitContainerContext(DeclContext *DC); 1352 void ActOnObjCReenterContainerContext(DeclContext *DC); 1353 1354 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1355 /// error parsing the definition of a tag. 1356 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1357 1358 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1359 EnumConstantDecl *LastEnumConst, 1360 SourceLocation IdLoc, 1361 IdentifierInfo *Id, 1362 Expr *val); 1363 bool CheckEnumUnderlyingType(TypeSourceInfo *TI); 1364 bool CheckEnumRedeclaration(SourceLocation EnumLoc, bool IsScoped, 1365 QualType EnumUnderlyingTy, const EnumDecl *Prev); 1366 1367 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1368 SourceLocation IdLoc, IdentifierInfo *Id, 1369 AttributeList *Attrs, 1370 SourceLocation EqualLoc, Expr *Val); 1371 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1372 SourceLocation RBraceLoc, Decl *EnumDecl, 1373 Decl **Elements, unsigned NumElements, 1374 Scope *S, AttributeList *Attr); 1375 1376 DeclContext *getContainingDC(DeclContext *DC); 1377 1378 /// Set the current declaration context until it gets popped. 1379 void PushDeclContext(Scope *S, DeclContext *DC); 1380 void PopDeclContext(); 1381 1382 /// EnterDeclaratorContext - Used when we must lookup names in the context 1383 /// of a declarator's nested name specifier. 1384 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1385 void ExitDeclaratorContext(Scope *S); 1386 1387 /// Push the parameters of D, which must be a function, into scope. 1388 void ActOnReenterFunctionContext(Scope* S, Decl* D); 1389 void ActOnExitFunctionContext(); 1390 1391 DeclContext *getFunctionLevelDeclContext(); 1392 1393 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1394 /// to the function decl for the function being parsed. If we're currently 1395 /// in a 'block', this returns the containing context. 1396 FunctionDecl *getCurFunctionDecl(); 1397 1398 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1399 /// the method decl for the method being parsed. If we're currently 1400 /// in a 'block', this returns the containing context. 1401 ObjCMethodDecl *getCurMethodDecl(); 1402 1403 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1404 /// or C function we're in, otherwise return null. If we're currently 1405 /// in a 'block', this returns the containing context. 1406 NamedDecl *getCurFunctionOrMethodDecl(); 1407 1408 /// Add this decl to the scope shadowed decl chains. 1409 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1410 1411 /// \brief Make the given externally-produced declaration visible at the 1412 /// top level scope. 1413 /// 1414 /// \param D The externally-produced declaration to push. 1415 /// 1416 /// \param Name The name of the externally-produced declaration. 1417 void pushExternalDeclIntoScope(NamedDecl *D, DeclarationName Name); 1418 1419 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1420 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1421 /// true if 'D' belongs to the given declaration context. 1422 /// 1423 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1424 /// whether the declaration is in scope for the purposes of explicit template 1425 /// instantiation or specialization. The default is false. 1426 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1427 bool ExplicitInstantiationOrSpecialization = false); 1428 1429 /// Finds the scope corresponding to the given decl context, if it 1430 /// happens to be an enclosing scope. Otherwise return NULL. 1431 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1432 1433 /// Subroutines of ActOnDeclarator(). 1434 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1435 TypeSourceInfo *TInfo); 1436 bool isIncompatibleTypedef(TypeDecl *Old, TypedefNameDecl *New); 1437 void mergeDeclAttributes(Decl *New, Decl *Old, bool MergeDeprecation = true); 1438 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1439 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old, Scope *S); 1440 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old, 1441 Scope *S); 1442 void mergeObjCMethodDecls(ObjCMethodDecl *New, ObjCMethodDecl *Old); 1443 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1444 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1445 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1446 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old, Scope *S); 1447 1448 // AssignmentAction - This is used by all the assignment diagnostic functions 1449 // to represent what is actually causing the operation 1450 enum AssignmentAction { 1451 AA_Assigning, 1452 AA_Passing, 1453 AA_Returning, 1454 AA_Converting, 1455 AA_Initializing, 1456 AA_Sending, 1457 AA_Casting 1458 }; 1459 1460 /// C++ Overloading. 1461 enum OverloadKind { 1462 /// This is a legitimate overload: the existing declarations are 1463 /// functions or function templates with different signatures. 1464 Ovl_Overload, 1465 1466 /// This is not an overload because the signature exactly matches 1467 /// an existing declaration. 1468 Ovl_Match, 1469 1470 /// This is not an overload because the lookup results contain a 1471 /// non-function. 1472 Ovl_NonFunction 1473 }; 1474 OverloadKind CheckOverload(Scope *S, 1475 FunctionDecl *New, 1476 const LookupResult &OldDecls, 1477 NamedDecl *&OldDecl, 1478 bool IsForUsingDecl); 1479 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1480 1481 /// \brief Checks availability of the function depending on the current 1482 /// function context.Inside an unavailable function,unavailability is ignored. 1483 /// 1484 /// \returns true if \arg FD is unavailable and current context is inside 1485 /// an available function, false otherwise. 1486 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1487 1488 ImplicitConversionSequence 1489 TryImplicitConversion(Expr *From, QualType ToType, 1490 bool SuppressUserConversions, 1491 bool AllowExplicit, 1492 bool InOverloadResolution, 1493 bool CStyle, 1494 bool AllowObjCWritebackConversion); 1495 1496 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1497 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1498 bool IsComplexPromotion(QualType FromType, QualType ToType); 1499 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1500 bool InOverloadResolution, 1501 QualType& ConvertedType, bool &IncompatibleObjC); 1502 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1503 QualType& ConvertedType, bool &IncompatibleObjC); 1504 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1505 QualType &ConvertedType); 1506 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1507 QualType& ConvertedType); 1508 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1509 const FunctionProtoType *NewType, 1510 unsigned *ArgPos = 0); 1511 void HandleFunctionTypeMismatch(PartialDiagnostic &PDiag, 1512 QualType FromType, QualType ToType); 1513 1514 CastKind PrepareCastToObjCObjectPointer(ExprResult &E); 1515 bool CheckPointerConversion(Expr *From, QualType ToType, 1516 CastKind &Kind, 1517 CXXCastPath& BasePath, 1518 bool IgnoreBaseAccess); 1519 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1520 bool InOverloadResolution, 1521 QualType &ConvertedType); 1522 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1523 CastKind &Kind, 1524 CXXCastPath &BasePath, 1525 bool IgnoreBaseAccess); 1526 bool IsQualificationConversion(QualType FromType, QualType ToType, 1527 bool CStyle, bool &ObjCLifetimeConversion); 1528 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1529 QualType &ResultTy); 1530 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1531 1532 1533 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1534 const VarDecl *NRVOCandidate, 1535 QualType ResultType, 1536 Expr *Value, 1537 bool AllowNRVO = true); 1538 1539 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1540 ExprResult Init); 1541 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1542 SourceLocation EqualLoc, 1543 ExprResult Init, 1544 bool TopLevelOfInitList = false, 1545 bool AllowExplicit = false); 1546 ExprResult PerformObjectArgumentInitialization(Expr *From, 1547 NestedNameSpecifier *Qualifier, 1548 NamedDecl *FoundDecl, 1549 CXXMethodDecl *Method); 1550 1551 ExprResult PerformContextuallyConvertToBool(Expr *From); 1552 ExprResult PerformContextuallyConvertToObjCPointer(Expr *From); 1553 1554 /// Contexts in which a converted constant expression is required. 1555 enum CCEKind { 1556 CCEK_CaseValue, ///< Expression in a case label. 1557 CCEK_Enumerator, ///< Enumerator value with fixed underlying type. 1558 CCEK_TemplateArg ///< Value of a non-type template parameter. 1559 }; 1560 ExprResult CheckConvertedConstantExpression(Expr *From, QualType T, 1561 llvm::APSInt &Value, CCEKind CCE); 1562 1563 ExprResult 1564 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1565 const PartialDiagnostic &NotIntDiag, 1566 const PartialDiagnostic &IncompleteDiag, 1567 const PartialDiagnostic &ExplicitConvDiag, 1568 const PartialDiagnostic &ExplicitConvNote, 1569 const PartialDiagnostic &AmbigDiag, 1570 const PartialDiagnostic &AmbigNote, 1571 const PartialDiagnostic &ConvDiag, 1572 bool AllowScopedEnumerations); 1573 enum ObjCSubscriptKind { 1574 OS_Array, 1575 OS_Dictionary, 1576 OS_Error 1577 }; 1578 ObjCSubscriptKind CheckSubscriptingKind(Expr *FromE); 1579 1580 ExprResult PerformObjectMemberConversion(Expr *From, 1581 NestedNameSpecifier *Qualifier, 1582 NamedDecl *FoundDecl, 1583 NamedDecl *Member); 1584 1585 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1586 // TODO: make this is a typesafe union. 1587 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1588 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1589 1590 void AddOverloadCandidate(FunctionDecl *Function, 1591 DeclAccessPair FoundDecl, 1592 llvm::ArrayRef<Expr *> Args, 1593 OverloadCandidateSet& CandidateSet, 1594 bool SuppressUserConversions = false, 1595 bool PartialOverloading = false, 1596 bool AllowExplicit = false); 1597 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1598 llvm::ArrayRef<Expr *> Args, 1599 OverloadCandidateSet& CandidateSet, 1600 bool SuppressUserConversions = false, 1601 TemplateArgumentListInfo *ExplicitTemplateArgs = 0); 1602 void AddMethodCandidate(DeclAccessPair FoundDecl, 1603 QualType ObjectType, 1604 Expr::Classification ObjectClassification, 1605 Expr **Args, unsigned NumArgs, 1606 OverloadCandidateSet& CandidateSet, 1607 bool SuppressUserConversion = false); 1608 void AddMethodCandidate(CXXMethodDecl *Method, 1609 DeclAccessPair FoundDecl, 1610 CXXRecordDecl *ActingContext, QualType ObjectType, 1611 Expr::Classification ObjectClassification, 1612 llvm::ArrayRef<Expr *> Args, 1613 OverloadCandidateSet& CandidateSet, 1614 bool SuppressUserConversions = false); 1615 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1616 DeclAccessPair FoundDecl, 1617 CXXRecordDecl *ActingContext, 1618 TemplateArgumentListInfo *ExplicitTemplateArgs, 1619 QualType ObjectType, 1620 Expr::Classification ObjectClassification, 1621 llvm::ArrayRef<Expr *> Args, 1622 OverloadCandidateSet& CandidateSet, 1623 bool SuppressUserConversions = false); 1624 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1625 DeclAccessPair FoundDecl, 1626 TemplateArgumentListInfo *ExplicitTemplateArgs, 1627 llvm::ArrayRef<Expr *> Args, 1628 OverloadCandidateSet& CandidateSet, 1629 bool SuppressUserConversions = false); 1630 void AddConversionCandidate(CXXConversionDecl *Conversion, 1631 DeclAccessPair FoundDecl, 1632 CXXRecordDecl *ActingContext, 1633 Expr *From, QualType ToType, 1634 OverloadCandidateSet& CandidateSet); 1635 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1636 DeclAccessPair FoundDecl, 1637 CXXRecordDecl *ActingContext, 1638 Expr *From, QualType ToType, 1639 OverloadCandidateSet &CandidateSet); 1640 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1641 DeclAccessPair FoundDecl, 1642 CXXRecordDecl *ActingContext, 1643 const FunctionProtoType *Proto, 1644 Expr *Object, llvm::ArrayRef<Expr*> Args, 1645 OverloadCandidateSet& CandidateSet); 1646 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1647 SourceLocation OpLoc, 1648 Expr **Args, unsigned NumArgs, 1649 OverloadCandidateSet& CandidateSet, 1650 SourceRange OpRange = SourceRange()); 1651 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1652 Expr **Args, unsigned NumArgs, 1653 OverloadCandidateSet& CandidateSet, 1654 bool IsAssignmentOperator = false, 1655 unsigned NumContextualBoolArguments = 0); 1656 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1657 SourceLocation OpLoc, 1658 Expr **Args, unsigned NumArgs, 1659 OverloadCandidateSet& CandidateSet); 1660 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1661 bool Operator, SourceLocation Loc, 1662 llvm::ArrayRef<Expr *> Args, 1663 TemplateArgumentListInfo *ExplicitTemplateArgs, 1664 OverloadCandidateSet& CandidateSet, 1665 bool PartialOverloading = false, 1666 bool StdNamespaceIsAssociated = false); 1667 1668 // Emit as a 'note' the specific overload candidate 1669 void NoteOverloadCandidate(FunctionDecl *Fn, QualType DestType = QualType()); 1670 1671 // Emit as a series of 'note's all template and non-templates 1672 // identified by the expression Expr 1673 void NoteAllOverloadCandidates(Expr* E, QualType DestType = QualType()); 1674 1675 // [PossiblyAFunctionType] --> [Return] 1676 // NonFunctionType --> NonFunctionType 1677 // R (A) --> R(A) 1678 // R (*)(A) --> R (A) 1679 // R (&)(A) --> R (A) 1680 // R (S::*)(A) --> R (A) 1681 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1682 1683 FunctionDecl * 1684 ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, 1685 QualType TargetType, 1686 bool Complain, 1687 DeclAccessPair &Found, 1688 bool *pHadMultipleCandidates = 0); 1689 1690 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1691 bool Complain = false, 1692 DeclAccessPair* Found = 0); 1693 1694 bool ResolveAndFixSingleFunctionTemplateSpecialization( 1695 ExprResult &SrcExpr, 1696 bool DoFunctionPointerConverion = false, 1697 bool Complain = false, 1698 const SourceRange& OpRangeForComplaining = SourceRange(), 1699 QualType DestTypeForComplaining = QualType(), 1700 unsigned DiagIDForComplaining = 0); 1701 1702 1703 Expr *FixOverloadedFunctionReference(Expr *E, 1704 DeclAccessPair FoundDecl, 1705 FunctionDecl *Fn); 1706 ExprResult FixOverloadedFunctionReference(ExprResult, 1707 DeclAccessPair FoundDecl, 1708 FunctionDecl *Fn); 1709 1710 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1711 llvm::ArrayRef<Expr *> Args, 1712 OverloadCandidateSet &CandidateSet, 1713 bool PartialOverloading = false); 1714 1715 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1716 UnresolvedLookupExpr *ULE, 1717 SourceLocation LParenLoc, 1718 Expr **Args, unsigned NumArgs, 1719 SourceLocation RParenLoc, 1720 Expr *ExecConfig, 1721 bool AllowTypoCorrection=true); 1722 1723 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1724 unsigned Opc, 1725 const UnresolvedSetImpl &Fns, 1726 Expr *input); 1727 1728 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1729 unsigned Opc, 1730 const UnresolvedSetImpl &Fns, 1731 Expr *LHS, Expr *RHS); 1732 1733 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1734 SourceLocation RLoc, 1735 Expr *Base,Expr *Idx); 1736 1737 ExprResult 1738 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1739 SourceLocation LParenLoc, Expr **Args, 1740 unsigned NumArgs, SourceLocation RParenLoc); 1741 ExprResult 1742 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1743 Expr **Args, unsigned NumArgs, 1744 SourceLocation RParenLoc); 1745 1746 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1747 SourceLocation OpLoc); 1748 1749 /// CheckCallReturnType - Checks that a call expression's return type is 1750 /// complete. Returns true on failure. The location passed in is the location 1751 /// that best represents the call. 1752 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1753 CallExpr *CE, FunctionDecl *FD); 1754 1755 /// Helpers for dealing with blocks and functions. 1756 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1757 bool CheckParameterNames); 1758 void CheckCXXDefaultArguments(FunctionDecl *FD); 1759 void CheckExtraCXXDefaultArguments(Declarator &D); 1760 Scope *getNonFieldDeclScope(Scope *S); 1761 1762 /// \name Name lookup 1763 /// 1764 /// These routines provide name lookup that is used during semantic 1765 /// analysis to resolve the various kinds of names (identifiers, 1766 /// overloaded operator names, constructor names, etc.) into zero or 1767 /// more declarations within a particular scope. The major entry 1768 /// points are LookupName, which performs unqualified name lookup, 1769 /// and LookupQualifiedName, which performs qualified name lookup. 1770 /// 1771 /// All name lookup is performed based on some specific criteria, 1772 /// which specify what names will be visible to name lookup and how 1773 /// far name lookup should work. These criteria are important both 1774 /// for capturing language semantics (certain lookups will ignore 1775 /// certain names, for example) and for performance, since name 1776 /// lookup is often a bottleneck in the compilation of C++. Name 1777 /// lookup criteria is specified via the LookupCriteria enumeration. 1778 /// 1779 /// The results of name lookup can vary based on the kind of name 1780 /// lookup performed, the current language, and the translation 1781 /// unit. In C, for example, name lookup will either return nothing 1782 /// (no entity found) or a single declaration. In C++, name lookup 1783 /// can additionally refer to a set of overloaded functions or 1784 /// result in an ambiguity. All of the possible results of name 1785 /// lookup are captured by the LookupResult class, which provides 1786 /// the ability to distinguish among them. 1787 //@{ 1788 1789 /// @brief Describes the kind of name lookup to perform. 1790 enum LookupNameKind { 1791 /// Ordinary name lookup, which finds ordinary names (functions, 1792 /// variables, typedefs, etc.) in C and most kinds of names 1793 /// (functions, variables, members, types, etc.) in C++. 1794 LookupOrdinaryName = 0, 1795 /// Tag name lookup, which finds the names of enums, classes, 1796 /// structs, and unions. 1797 LookupTagName, 1798 /// Label name lookup. 1799 LookupLabel, 1800 /// Member name lookup, which finds the names of 1801 /// class/struct/union members. 1802 LookupMemberName, 1803 /// Look up of an operator name (e.g., operator+) for use with 1804 /// operator overloading. This lookup is similar to ordinary name 1805 /// lookup, but will ignore any declarations that are class members. 1806 LookupOperatorName, 1807 /// Look up of a name that precedes the '::' scope resolution 1808 /// operator in C++. This lookup completely ignores operator, object, 1809 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1810 LookupNestedNameSpecifierName, 1811 /// Look up a namespace name within a C++ using directive or 1812 /// namespace alias definition, ignoring non-namespace names (C++ 1813 /// [basic.lookup.udir]p1). 1814 LookupNamespaceName, 1815 /// Look up all declarations in a scope with the given name, 1816 /// including resolved using declarations. This is appropriate 1817 /// for checking redeclarations for a using declaration. 1818 LookupUsingDeclName, 1819 /// Look up an ordinary name that is going to be redeclared as a 1820 /// name with linkage. This lookup ignores any declarations that 1821 /// are outside of the current scope unless they have linkage. See 1822 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1823 LookupRedeclarationWithLinkage, 1824 /// Look up the name of an Objective-C protocol. 1825 LookupObjCProtocolName, 1826 /// Look up implicit 'self' parameter of an objective-c method. 1827 LookupObjCImplicitSelfParam, 1828 /// \brief Look up any declaration with any name. 1829 LookupAnyName 1830 }; 1831 1832 /// \brief Specifies whether (or how) name lookup is being performed for a 1833 /// redeclaration (vs. a reference). 1834 enum RedeclarationKind { 1835 /// \brief The lookup is a reference to this name that is not for the 1836 /// purpose of redeclaring the name. 1837 NotForRedeclaration = 0, 1838 /// \brief The lookup results will be used for redeclaration of a name, 1839 /// if an entity by that name already exists. 1840 ForRedeclaration 1841 }; 1842 1843 /// \brief The possible outcomes of name lookup for a literal operator. 1844 enum LiteralOperatorLookupResult { 1845 /// \brief The lookup resulted in an error. 1846 LOLR_Error, 1847 /// \brief The lookup found a single 'cooked' literal operator, which 1848 /// expects a normal literal to be built and passed to it. 1849 LOLR_Cooked, 1850 /// \brief The lookup found a single 'raw' literal operator, which expects 1851 /// a string literal containing the spelling of the literal token. 1852 LOLR_Raw, 1853 /// \brief The lookup found an overload set of literal operator templates, 1854 /// which expect the characters of the spelling of the literal token to be 1855 /// passed as a non-type template argument pack. 1856 LOLR_Template 1857 }; 1858 1859 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1860 CXXSpecialMember SM, 1861 bool ConstArg, 1862 bool VolatileArg, 1863 bool RValueThis, 1864 bool ConstThis, 1865 bool VolatileThis); 1866 1867private: 1868 bool CppLookupName(LookupResult &R, Scope *S); 1869 1870 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1871 // 1872 // The boolean value will be true to indicate that the namespace was loaded 1873 // from an AST/PCH file, or false otherwise. 1874 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1875 1876 /// \brief Whether we have already loaded known namespaces from an extenal 1877 /// source. 1878 bool LoadedExternalKnownNamespaces; 1879 1880public: 1881 /// \brief Look up a name, looking for a single declaration. Return 1882 /// null if the results were absent, ambiguous, or overloaded. 1883 /// 1884 /// It is preferable to use the elaborated form and explicitly handle 1885 /// ambiguity and overloaded. 1886 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1887 SourceLocation Loc, 1888 LookupNameKind NameKind, 1889 RedeclarationKind Redecl 1890 = NotForRedeclaration); 1891 bool LookupName(LookupResult &R, Scope *S, 1892 bool AllowBuiltinCreation = false); 1893 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1894 bool InUnqualifiedLookup = false); 1895 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1896 bool AllowBuiltinCreation = false, 1897 bool EnteringContext = false); 1898 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc, 1899 RedeclarationKind Redecl 1900 = NotForRedeclaration); 1901 1902 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1903 QualType T1, QualType T2, 1904 UnresolvedSetImpl &Functions); 1905 1906 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1907 SourceLocation GnuLabelLoc = SourceLocation()); 1908 1909 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1910 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1911 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1912 unsigned Quals, 1913 bool *ConstParam = 0); 1914 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1915 bool RValueThis, unsigned ThisQuals, 1916 bool *ConstParam = 0); 1917 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class); 1918 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, bool RValueThis, 1919 unsigned ThisQuals); 1920 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1921 1922 LiteralOperatorLookupResult LookupLiteralOperator(Scope *S, LookupResult &R, 1923 ArrayRef<QualType> ArgTys, 1924 bool AllowRawAndTemplate); 1925 1926 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1927 SourceLocation Loc, 1928 llvm::ArrayRef<Expr *> Args, 1929 ADLResult &Functions, 1930 bool StdNamespaceIsAssociated = false); 1931 1932 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1933 VisibleDeclConsumer &Consumer, 1934 bool IncludeGlobalScope = true); 1935 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1936 VisibleDeclConsumer &Consumer, 1937 bool IncludeGlobalScope = true); 1938 1939 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1940 Sema::LookupNameKind LookupKind, 1941 Scope *S, CXXScopeSpec *SS, 1942 CorrectionCandidateCallback &CCC, 1943 DeclContext *MemberContext = 0, 1944 bool EnteringContext = false, 1945 const ObjCObjectPointerType *OPT = 0); 1946 1947 void FindAssociatedClassesAndNamespaces(llvm::ArrayRef<Expr *> Args, 1948 AssociatedNamespaceSet &AssociatedNamespaces, 1949 AssociatedClassSet &AssociatedClasses); 1950 1951 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1952 bool ConsiderLinkage, 1953 bool ExplicitInstantiationOrSpecialization); 1954 1955 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1956 //@} 1957 1958 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1959 SourceLocation IdLoc, 1960 bool TypoCorrection = false); 1961 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1962 Scope *S, bool ForRedeclaration, 1963 SourceLocation Loc); 1964 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1965 Scope *S); 1966 void AddKnownFunctionAttributes(FunctionDecl *FD); 1967 1968 // More parsing and symbol table subroutines. 1969 1970 // Decl attributes - this routine is the top level dispatcher. 1971 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1972 bool NonInheritable = true, bool Inheritable = true); 1973 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1974 bool NonInheritable = true, bool Inheritable = true); 1975 bool ProcessAccessDeclAttributeList(AccessSpecDecl *ASDecl, 1976 const AttributeList *AttrList); 1977 1978 void checkUnusedDeclAttributes(Declarator &D); 1979 1980 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1981 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1982 bool CheckNoReturnAttr(const AttributeList &attr); 1983 1984 /// \brief Stmt attributes - this routine is the top level dispatcher. 1985 StmtResult ProcessStmtAttributes(Stmt *Stmt, AttributeList *Attrs, 1986 SourceRange Range); 1987 1988 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1989 bool &IncompleteImpl, unsigned DiagID); 1990 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 1991 ObjCMethodDecl *MethodDecl, 1992 bool IsProtocolMethodDecl); 1993 1994 void CheckConflictingOverridingMethod(ObjCMethodDecl *Method, 1995 ObjCMethodDecl *Overridden, 1996 bool IsProtocolMethodDecl); 1997 1998 /// WarnExactTypedMethods - This routine issues a warning if method 1999 /// implementation declaration matches exactly that of its declaration. 2000 void WarnExactTypedMethods(ObjCMethodDecl *Method, 2001 ObjCMethodDecl *MethodDecl, 2002 bool IsProtocolMethodDecl); 2003 2004 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 2005 ObjCInterfaceDecl *IDecl); 2006 2007 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 2008 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap; 2009 2010 /// CheckProtocolMethodDefs - This routine checks unimplemented 2011 /// methods declared in protocol, and those referenced by it. 2012 /// \param IDecl - Used for checking for methods which may have been 2013 /// inherited. 2014 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 2015 ObjCProtocolDecl *PDecl, 2016 bool& IncompleteImpl, 2017 const SelectorSet &InsMap, 2018 const SelectorSet &ClsMap, 2019 ObjCContainerDecl *CDecl); 2020 2021 /// CheckImplementationIvars - This routine checks if the instance variables 2022 /// listed in the implelementation match those listed in the interface. 2023 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 2024 ObjCIvarDecl **Fields, unsigned nIvars, 2025 SourceLocation Loc); 2026 2027 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 2028 /// remains unimplemented in the class or category @implementation. 2029 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 2030 ObjCContainerDecl* IDecl, 2031 bool IncompleteImpl = false); 2032 2033 /// DiagnoseUnimplementedProperties - This routine warns on those properties 2034 /// which must be implemented by this implementation. 2035 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 2036 ObjCContainerDecl *CDecl, 2037 const SelectorSet &InsMap); 2038 2039 /// DefaultSynthesizeProperties - This routine default synthesizes all 2040 /// properties which must be synthesized in class's @implementation. 2041 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 2042 ObjCInterfaceDecl *IDecl); 2043 void DefaultSynthesizeProperties(Scope *S, Decl *D); 2044 2045 /// CollectImmediateProperties - This routine collects all properties in 2046 /// the class and its conforming protocols; but not those it its super class. 2047 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 2048 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 2049 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 2050 2051 2052 /// LookupPropertyDecl - Looks up a property in the current class and all 2053 /// its protocols. 2054 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 2055 IdentifierInfo *II); 2056 2057 /// Called by ActOnProperty to handle @property declarations in 2058 //// class extensions. 2059 Decl *HandlePropertyInClassExtension(Scope *S, 2060 SourceLocation AtLoc, 2061 SourceLocation LParenLoc, 2062 FieldDeclarator &FD, 2063 Selector GetterSel, 2064 Selector SetterSel, 2065 const bool isAssign, 2066 const bool isReadWrite, 2067 const unsigned Attributes, 2068 const unsigned AttributesAsWritten, 2069 bool *isOverridingProperty, 2070 TypeSourceInfo *T, 2071 tok::ObjCKeywordKind MethodImplKind); 2072 2073 /// Called by ActOnProperty and HandlePropertyInClassExtension to 2074 /// handle creating the ObjcPropertyDecl for a category or @interface. 2075 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 2076 ObjCContainerDecl *CDecl, 2077 SourceLocation AtLoc, 2078 SourceLocation LParenLoc, 2079 FieldDeclarator &FD, 2080 Selector GetterSel, 2081 Selector SetterSel, 2082 const bool isAssign, 2083 const bool isReadWrite, 2084 const unsigned Attributes, 2085 const unsigned AttributesAsWritten, 2086 TypeSourceInfo *T, 2087 tok::ObjCKeywordKind MethodImplKind, 2088 DeclContext *lexicalDC = 0); 2089 2090 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 2091 /// warning) when atomic property has one but not the other user-declared 2092 /// setter or getter. 2093 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 2094 ObjCContainerDecl* IDecl); 2095 2096 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 2097 2098 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 2099 2100 enum MethodMatchStrategy { 2101 MMS_loose, 2102 MMS_strict 2103 }; 2104 2105 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 2106 /// true, or false, accordingly. 2107 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 2108 const ObjCMethodDecl *PrevMethod, 2109 MethodMatchStrategy strategy = MMS_strict); 2110 2111 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 2112 /// or protocol against those declared in their implementations. 2113 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 2114 const SelectorSet &ClsMap, 2115 SelectorSet &InsMapSeen, 2116 SelectorSet &ClsMapSeen, 2117 ObjCImplDecl* IMPDecl, 2118 ObjCContainerDecl* IDecl, 2119 bool &IncompleteImpl, 2120 bool ImmediateClass, 2121 bool WarnCategoryMethodImpl=false); 2122 2123 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in 2124 /// category matches with those implemented in its primary class and 2125 /// warns each time an exact match is found. 2126 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP); 2127 2128 /// \brief Add the given method to the list of globally-known methods. 2129 void addMethodToGlobalList(ObjCMethodList *List, ObjCMethodDecl *Method); 2130 2131private: 2132 /// AddMethodToGlobalPool - Add an instance or factory method to the global 2133 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 2134 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 2135 2136 /// LookupMethodInGlobalPool - Returns the instance or factory method and 2137 /// optionally warns if there are multiple signatures. 2138 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 2139 bool receiverIdOrClass, 2140 bool warn, bool instance); 2141 2142public: 2143 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 2144 /// unit are added to a global pool. This allows us to efficiently associate 2145 /// a selector with a method declaraation for purposes of typechecking 2146 /// messages sent to "id" (where the class of the object is unknown). 2147 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2148 AddMethodToGlobalPool(Method, impl, /*instance*/true); 2149 } 2150 2151 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 2152 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2153 AddMethodToGlobalPool(Method, impl, /*instance*/false); 2154 } 2155 2156 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global 2157 /// pool. 2158 void AddAnyMethodToGlobalPool(Decl *D); 2159 2160 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 2161 /// there are multiple signatures. 2162 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 2163 bool receiverIdOrClass=false, 2164 bool warn=true) { 2165 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2166 warn, /*instance*/true); 2167 } 2168 2169 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 2170 /// there are multiple signatures. 2171 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 2172 bool receiverIdOrClass=false, 2173 bool warn=true) { 2174 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2175 warn, /*instance*/false); 2176 } 2177 2178 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 2179 /// implementation. 2180 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 2181 2182 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 2183 /// initialization. 2184 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 2185 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 2186 2187 //===--------------------------------------------------------------------===// 2188 // Statement Parsing Callbacks: SemaStmt.cpp. 2189public: 2190 class FullExprArg { 2191 public: 2192 FullExprArg(Sema &actions) : E(0) { } 2193 2194 // FIXME: The const_cast here is ugly. RValue references would make this 2195 // much nicer (or we could duplicate a bunch of the move semantics 2196 // emulation code from Ownership.h). 2197 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 2198 2199 ExprResult release() { 2200 return move(E); 2201 } 2202 2203 Expr *get() const { return E; } 2204 2205 Expr *operator->() { 2206 return E; 2207 } 2208 2209 private: 2210 // FIXME: No need to make the entire Sema class a friend when it's just 2211 // Sema::MakeFullExpr that needs access to the constructor below. 2212 friend class Sema; 2213 2214 explicit FullExprArg(Expr *expr) : E(expr) {} 2215 2216 Expr *E; 2217 }; 2218 2219 FullExprArg MakeFullExpr(Expr *Arg) { 2220 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 2221 } 2222 2223 StmtResult ActOnExprStmt(FullExprArg Expr); 2224 2225 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 2226 bool HasLeadingEmptyMacro = false); 2227 2228 void ActOnStartOfCompoundStmt(); 2229 void ActOnFinishOfCompoundStmt(); 2230 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 2231 MultiStmtArg Elts, 2232 bool isStmtExpr); 2233 2234 /// \brief A RAII object to enter scope of a compound statement. 2235 class CompoundScopeRAII { 2236 public: 2237 CompoundScopeRAII(Sema &S): S(S) { 2238 S.ActOnStartOfCompoundStmt(); 2239 } 2240 2241 ~CompoundScopeRAII() { 2242 S.ActOnFinishOfCompoundStmt(); 2243 } 2244 2245 private: 2246 Sema &S; 2247 }; 2248 2249 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2250 SourceLocation StartLoc, 2251 SourceLocation EndLoc); 2252 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2253 StmtResult ActOnForEachLValueExpr(Expr *E); 2254 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2255 SourceLocation DotDotDotLoc, Expr *RHSVal, 2256 SourceLocation ColonLoc); 2257 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2258 2259 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2260 SourceLocation ColonLoc, 2261 Stmt *SubStmt, Scope *CurScope); 2262 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2263 SourceLocation ColonLoc, Stmt *SubStmt); 2264 2265 StmtResult ActOnAttributedStmt(SourceLocation AttrLoc, const AttrVec &Attrs, 2266 Stmt *SubStmt); 2267 2268 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2269 FullExprArg CondVal, Decl *CondVar, 2270 Stmt *ThenVal, 2271 SourceLocation ElseLoc, Stmt *ElseVal); 2272 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2273 Expr *Cond, 2274 Decl *CondVar); 2275 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2276 Stmt *Switch, Stmt *Body); 2277 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2278 FullExprArg Cond, 2279 Decl *CondVar, Stmt *Body); 2280 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2281 SourceLocation WhileLoc, 2282 SourceLocation CondLParen, Expr *Cond, 2283 SourceLocation CondRParen); 2284 2285 StmtResult ActOnForStmt(SourceLocation ForLoc, 2286 SourceLocation LParenLoc, 2287 Stmt *First, FullExprArg Second, 2288 Decl *SecondVar, 2289 FullExprArg Third, 2290 SourceLocation RParenLoc, 2291 Stmt *Body); 2292 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc, 2293 Expr *collection); 2294 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2295 SourceLocation LParenLoc, 2296 Stmt *First, Expr *Second, 2297 SourceLocation RParenLoc, Stmt *Body); 2298 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2299 SourceLocation LParenLoc, Stmt *LoopVar, 2300 SourceLocation ColonLoc, Expr *Collection, 2301 SourceLocation RParenLoc); 2302 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2303 SourceLocation ColonLoc, 2304 Stmt *RangeDecl, Stmt *BeginEndDecl, 2305 Expr *Cond, Expr *Inc, 2306 Stmt *LoopVarDecl, 2307 SourceLocation RParenLoc); 2308 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2309 2310 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2311 SourceLocation LabelLoc, 2312 LabelDecl *TheDecl); 2313 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2314 SourceLocation StarLoc, 2315 Expr *DestExp); 2316 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2317 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2318 2319 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2320 bool AllowFunctionParameters); 2321 2322 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2323 StmtResult ActOnCapScopeReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2324 2325 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2326 bool IsSimple, bool IsVolatile, 2327 unsigned NumOutputs, unsigned NumInputs, 2328 IdentifierInfo **Names, 2329 MultiExprArg Constraints, 2330 MultiExprArg Exprs, 2331 Expr *AsmString, 2332 MultiExprArg Clobbers, 2333 SourceLocation RParenLoc, 2334 bool MSAsm = false); 2335 2336 2337 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2338 SourceLocation StartLoc, 2339 SourceLocation IdLoc, IdentifierInfo *Id, 2340 bool Invalid = false); 2341 2342 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2343 2344 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2345 Decl *Parm, Stmt *Body); 2346 2347 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2348 2349 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2350 MultiStmtArg Catch, Stmt *Finally); 2351 2352 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2353 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2354 Scope *CurScope); 2355 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, 2356 Expr *operand); 2357 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2358 Expr *SynchExpr, 2359 Stmt *SynchBody); 2360 2361 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2362 2363 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2364 SourceLocation StartLoc, 2365 SourceLocation IdLoc, 2366 IdentifierInfo *Id); 2367 2368 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2369 2370 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2371 Decl *ExDecl, Stmt *HandlerBlock); 2372 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2373 MultiStmtArg Handlers); 2374 2375 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2376 SourceLocation TryLoc, 2377 Stmt *TryBlock, 2378 Stmt *Handler); 2379 2380 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2381 Expr *FilterExpr, 2382 Stmt *Block); 2383 2384 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2385 Stmt *Block); 2386 2387 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2388 2389 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2390 2391 /// \brief If it's a file scoped decl that must warn if not used, keep track 2392 /// of it. 2393 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2394 2395 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2396 /// whose result is unused, warn. 2397 void DiagnoseUnusedExprResult(const Stmt *S); 2398 void DiagnoseUnusedDecl(const NamedDecl *ND); 2399 2400 /// Emit \p DiagID if statement located on \p StmtLoc has a suspicious null 2401 /// statement as a \p Body, and it is located on the same line. 2402 /// 2403 /// This helps prevent bugs due to typos, such as: 2404 /// if (condition); 2405 /// do_stuff(); 2406 void DiagnoseEmptyStmtBody(SourceLocation StmtLoc, 2407 const Stmt *Body, 2408 unsigned DiagID); 2409 2410 /// Warn if a for/while loop statement \p S, which is followed by 2411 /// \p PossibleBody, has a suspicious null statement as a body. 2412 void DiagnoseEmptyLoopBody(const Stmt *S, 2413 const Stmt *PossibleBody); 2414 2415 ParsingDeclState PushParsingDeclaration() { 2416 return DelayedDiagnostics.pushParsingDecl(); 2417 } 2418 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2419 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2420 } 2421 2422 typedef ProcessingContextState ParsingClassState; 2423 ParsingClassState PushParsingClass() { 2424 return DelayedDiagnostics.pushContext(); 2425 } 2426 void PopParsingClass(ParsingClassState state) { 2427 DelayedDiagnostics.popContext(state); 2428 } 2429 2430 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2431 SourceLocation Loc, 2432 const ObjCInterfaceDecl *UnknownObjCClass=0); 2433 2434 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2435 2436 bool makeUnavailableInSystemHeader(SourceLocation loc, 2437 StringRef message); 2438 2439 //===--------------------------------------------------------------------===// 2440 // Expression Parsing Callbacks: SemaExpr.cpp. 2441 2442 bool CanUseDecl(NamedDecl *D); 2443 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2444 const ObjCInterfaceDecl *UnknownObjCClass=0); 2445 void NoteDeletedFunction(FunctionDecl *FD); 2446 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2447 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2448 ObjCMethodDecl *Getter, 2449 SourceLocation Loc); 2450 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2451 Expr **Args, unsigned NumArgs); 2452 2453 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext, 2454 Decl *LambdaContextDecl = 0, 2455 bool IsDecltype = false); 2456 2457 void PopExpressionEvaluationContext(); 2458 2459 void DiscardCleanupsInEvaluationContext(); 2460 2461 ExprResult TranformToPotentiallyEvaluated(Expr *E); 2462 ExprResult HandleExprEvaluationContextForTypeof(Expr *E); 2463 2464 ExprResult ActOnConstantExpression(ExprResult Res); 2465 2466 // Functions for marking a declaration referenced. These functions also 2467 // contain the relevant logic for marking if a reference to a function or 2468 // variable is an odr-use (in the C++11 sense). There are separate variants 2469 // for expressions referring to a decl; these exist because odr-use marking 2470 // needs to be delayed for some constant variables when we build one of the 2471 // named expressions. 2472 void MarkAnyDeclReferenced(SourceLocation Loc, Decl *D); 2473 void MarkFunctionReferenced(SourceLocation Loc, FunctionDecl *Func); 2474 void MarkVariableReferenced(SourceLocation Loc, VarDecl *Var); 2475 void MarkDeclRefReferenced(DeclRefExpr *E); 2476 void MarkMemberReferenced(MemberExpr *E); 2477 2478 void UpdateMarkingForLValueToRValue(Expr *E); 2479 void CleanupVarDeclMarking(); 2480 2481 enum TryCaptureKind { 2482 TryCapture_Implicit, TryCapture_ExplicitByVal, TryCapture_ExplicitByRef 2483 }; 2484 2485 /// \brief Try to capture the given variable. 2486 /// 2487 /// \param Var The variable to capture. 2488 /// 2489 /// \param Loc The location at which the capture occurs. 2490 /// 2491 /// \param Kind The kind of capture, which may be implicit (for either a 2492 /// block or a lambda), or explicit by-value or by-reference (for a lambda). 2493 /// 2494 /// \param EllipsisLoc The location of the ellipsis, if one is provided in 2495 /// an explicit lambda capture. 2496 /// 2497 /// \param BuildAndDiagnose Whether we are actually supposed to add the 2498 /// captures or diagnose errors. If false, this routine merely check whether 2499 /// the capture can occur without performing the capture itself or complaining 2500 /// if the variable cannot be captured. 2501 /// 2502 /// \param CaptureType Will be set to the type of the field used to capture 2503 /// this variable in the innermost block or lambda. Only valid when the 2504 /// variable can be captured. 2505 /// 2506 /// \param DeclRefType Will be set to the type of a refernce to the capture 2507 /// from within the current scope. Only valid when the variable can be 2508 /// captured. 2509 /// 2510 /// \returns true if an error occurred (i.e., the variable cannot be 2511 /// captured) and false if the capture succeeded. 2512 bool tryCaptureVariable(VarDecl *Var, SourceLocation Loc, TryCaptureKind Kind, 2513 SourceLocation EllipsisLoc, bool BuildAndDiagnose, 2514 QualType &CaptureType, 2515 QualType &DeclRefType); 2516 2517 /// \brief Try to capture the given variable. 2518 bool tryCaptureVariable(VarDecl *Var, SourceLocation Loc, 2519 TryCaptureKind Kind = TryCapture_Implicit, 2520 SourceLocation EllipsisLoc = SourceLocation()); 2521 2522 /// \brief Given a variable, determine the type that a reference to that 2523 /// variable will have in the given scope. 2524 QualType getCapturedDeclRefType(VarDecl *Var, SourceLocation Loc); 2525 2526 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2527 void MarkDeclarationsReferencedInExpr(Expr *E, 2528 bool SkipLocalVariables = false); 2529 2530 /// \brief Try to recover by turning the given expression into a 2531 /// call. Returns true if recovery was attempted or an error was 2532 /// emitted; this may also leave the ExprResult invalid. 2533 bool tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD, 2534 bool ForceComplain = false, 2535 bool (*IsPlausibleResult)(QualType) = 0); 2536 2537 /// \brief Figure out if an expression could be turned into a call. 2538 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2539 UnresolvedSetImpl &NonTemplateOverloads); 2540 2541 /// \brief Conditionally issue a diagnostic based on the current 2542 /// evaluation context. 2543 /// 2544 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2545 /// the function body is parsed, and then do a basic reachability analysis to 2546 /// determine if the statement is reachable. If it is unreachable, the 2547 /// diagnostic will not be emitted. 2548 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement, 2549 const PartialDiagnostic &PD); 2550 2551 // Primary Expressions. 2552 SourceRange getExprRange(Expr *E) const; 2553 2554 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, 2555 SourceLocation TemplateKWLoc, 2556 UnqualifiedId &Id, 2557 bool HasTrailingLParen, bool IsAddressOfOperand, 2558 CorrectionCandidateCallback *CCC = 0); 2559 2560 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2561 TemplateArgumentListInfo &Buffer, 2562 DeclarationNameInfo &NameInfo, 2563 const TemplateArgumentListInfo *&TemplateArgs); 2564 2565 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2566 CorrectionCandidateCallback &CCC, 2567 TemplateArgumentListInfo *ExplicitTemplateArgs = 0, 2568 llvm::ArrayRef<Expr *> Args = llvm::ArrayRef<Expr *>()); 2569 2570 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S, 2571 IdentifierInfo *II, 2572 bool AllowBuiltinCreation=false); 2573 2574 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2575 SourceLocation TemplateKWLoc, 2576 const DeclarationNameInfo &NameInfo, 2577 bool isAddressOfOperand, 2578 const TemplateArgumentListInfo *TemplateArgs); 2579 2580 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2581 ExprValueKind VK, 2582 SourceLocation Loc, 2583 const CXXScopeSpec *SS = 0); 2584 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2585 ExprValueKind VK, 2586 const DeclarationNameInfo &NameInfo, 2587 const CXXScopeSpec *SS = 0); 2588 ExprResult 2589 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2590 SourceLocation nameLoc, 2591 IndirectFieldDecl *indirectField, 2592 Expr *baseObjectExpr = 0, 2593 SourceLocation opLoc = SourceLocation()); 2594 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2595 SourceLocation TemplateKWLoc, 2596 LookupResult &R, 2597 const TemplateArgumentListInfo *TemplateArgs); 2598 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2599 SourceLocation TemplateKWLoc, 2600 LookupResult &R, 2601 const TemplateArgumentListInfo *TemplateArgs, 2602 bool IsDefiniteInstance); 2603 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2604 const LookupResult &R, 2605 bool HasTrailingLParen); 2606 2607 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2608 const DeclarationNameInfo &NameInfo); 2609 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2610 SourceLocation TemplateKWLoc, 2611 const DeclarationNameInfo &NameInfo, 2612 const TemplateArgumentListInfo *TemplateArgs); 2613 2614 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2615 LookupResult &R, 2616 bool NeedsADL); 2617 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2618 const DeclarationNameInfo &NameInfo, 2619 NamedDecl *D); 2620 2621 ExprResult BuildLiteralOperatorCall(LookupResult &R, 2622 DeclarationNameInfo &SuffixInfo, 2623 ArrayRef<Expr*> Args, 2624 SourceLocation LitEndLoc, 2625 TemplateArgumentListInfo *ExplicitTemplateArgs = 0); 2626 2627 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2628 ExprResult ActOnIntegerConstant(SourceLocation Loc, uint64_t Val); 2629 ExprResult ActOnNumericConstant(const Token &Tok, Scope *UDLScope = 0); 2630 ExprResult ActOnCharacterConstant(const Token &Tok, Scope *UDLScope = 0); 2631 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E); 2632 ExprResult ActOnParenListExpr(SourceLocation L, 2633 SourceLocation R, 2634 MultiExprArg Val); 2635 2636 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2637 /// fragments (e.g. "foo" "bar" L"baz"). 2638 ExprResult ActOnStringLiteral(const Token *StringToks, unsigned NumStringToks, 2639 Scope *UDLScope = 0); 2640 2641 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2642 SourceLocation DefaultLoc, 2643 SourceLocation RParenLoc, 2644 Expr *ControllingExpr, 2645 MultiTypeArg ArgTypes, 2646 MultiExprArg ArgExprs); 2647 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2648 SourceLocation DefaultLoc, 2649 SourceLocation RParenLoc, 2650 Expr *ControllingExpr, 2651 TypeSourceInfo **Types, 2652 Expr **Exprs, 2653 unsigned NumAssocs); 2654 2655 // Binary/Unary Operators. 'Tok' is the token for the operator. 2656 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2657 Expr *InputExpr); 2658 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2659 UnaryOperatorKind Opc, Expr *Input); 2660 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2661 tok::TokenKind Op, Expr *Input); 2662 2663 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo, 2664 SourceLocation OpLoc, 2665 UnaryExprOrTypeTrait ExprKind, 2666 SourceRange R); 2667 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2668 UnaryExprOrTypeTrait ExprKind); 2669 ExprResult 2670 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2671 UnaryExprOrTypeTrait ExprKind, 2672 bool IsType, void *TyOrEx, 2673 const SourceRange &ArgRange); 2674 2675 ExprResult CheckPlaceholderExpr(Expr *E); 2676 bool CheckVecStepExpr(Expr *E); 2677 2678 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2679 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc, 2680 SourceRange ExprRange, 2681 UnaryExprOrTypeTrait ExprKind); 2682 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2683 SourceLocation OpLoc, 2684 IdentifierInfo &Name, 2685 SourceLocation NameLoc, 2686 SourceLocation RParenLoc); 2687 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2688 tok::TokenKind Kind, Expr *Input); 2689 2690 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2691 Expr *Idx, SourceLocation RLoc); 2692 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2693 Expr *Idx, SourceLocation RLoc); 2694 2695 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2696 SourceLocation OpLoc, bool IsArrow, 2697 CXXScopeSpec &SS, 2698 SourceLocation TemplateKWLoc, 2699 NamedDecl *FirstQualifierInScope, 2700 const DeclarationNameInfo &NameInfo, 2701 const TemplateArgumentListInfo *TemplateArgs); 2702 2703 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2704 SourceLocation OpLoc, bool IsArrow, 2705 const CXXScopeSpec &SS, 2706 SourceLocation TemplateKWLoc, 2707 NamedDecl *FirstQualifierInScope, 2708 LookupResult &R, 2709 const TemplateArgumentListInfo *TemplateArgs, 2710 bool SuppressQualifierCheck = false); 2711 2712 ExprResult PerformMemberExprBaseConversion(Expr *Base, bool IsArrow); 2713 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2714 bool &IsArrow, SourceLocation OpLoc, 2715 CXXScopeSpec &SS, 2716 Decl *ObjCImpDecl, 2717 bool HasTemplateArgs); 2718 2719 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2720 const CXXScopeSpec &SS, 2721 const LookupResult &R); 2722 2723 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2724 bool IsArrow, SourceLocation OpLoc, 2725 const CXXScopeSpec &SS, 2726 SourceLocation TemplateKWLoc, 2727 NamedDecl *FirstQualifierInScope, 2728 const DeclarationNameInfo &NameInfo, 2729 const TemplateArgumentListInfo *TemplateArgs); 2730 2731 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2732 SourceLocation OpLoc, 2733 tok::TokenKind OpKind, 2734 CXXScopeSpec &SS, 2735 SourceLocation TemplateKWLoc, 2736 UnqualifiedId &Member, 2737 Decl *ObjCImpDecl, 2738 bool HasTrailingLParen); 2739 2740 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2741 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2742 FunctionDecl *FDecl, 2743 const FunctionProtoType *Proto, 2744 Expr **Args, unsigned NumArgs, 2745 SourceLocation RParenLoc, 2746 bool ExecConfig = false); 2747 void CheckStaticArrayArgument(SourceLocation CallLoc, 2748 ParmVarDecl *Param, 2749 const Expr *ArgExpr); 2750 2751 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2752 /// This provides the location of the left/right parens and a list of comma 2753 /// locations. 2754 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2755 MultiExprArg ArgExprs, SourceLocation RParenLoc, 2756 Expr *ExecConfig = 0, bool IsExecConfig = false); 2757 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2758 SourceLocation LParenLoc, 2759 Expr **Args, unsigned NumArgs, 2760 SourceLocation RParenLoc, 2761 Expr *Config = 0, 2762 bool IsExecConfig = false); 2763 2764 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2765 MultiExprArg ExecConfig, 2766 SourceLocation GGGLoc); 2767 2768 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2769 Declarator &D, ParsedType &Ty, 2770 SourceLocation RParenLoc, Expr *CastExpr); 2771 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2772 TypeSourceInfo *Ty, 2773 SourceLocation RParenLoc, 2774 Expr *Op); 2775 CastKind PrepareScalarCast(ExprResult &src, QualType destType); 2776 2777 /// \brief Build an altivec or OpenCL literal. 2778 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2779 SourceLocation RParenLoc, Expr *E, 2780 TypeSourceInfo *TInfo); 2781 2782 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2783 2784 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2785 ParsedType Ty, 2786 SourceLocation RParenLoc, 2787 Expr *InitExpr); 2788 2789 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2790 TypeSourceInfo *TInfo, 2791 SourceLocation RParenLoc, 2792 Expr *LiteralExpr); 2793 2794 ExprResult ActOnInitList(SourceLocation LBraceLoc, 2795 MultiExprArg InitArgList, 2796 SourceLocation RBraceLoc); 2797 2798 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2799 SourceLocation Loc, 2800 bool GNUSyntax, 2801 ExprResult Init); 2802 2803 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2804 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr); 2805 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2806 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr); 2807 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc, 2808 Expr *LHSExpr, Expr *RHSExpr); 2809 2810 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2811 /// in the case of a the GNU conditional expr extension. 2812 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2813 SourceLocation ColonLoc, 2814 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr); 2815 2816 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2817 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2818 LabelDecl *TheDecl); 2819 2820 void ActOnStartStmtExpr(); 2821 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2822 SourceLocation RPLoc); // "({..})" 2823 void ActOnStmtExprError(); 2824 2825 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2826 struct OffsetOfComponent { 2827 SourceLocation LocStart, LocEnd; 2828 bool isBrackets; // true if [expr], false if .ident 2829 union { 2830 IdentifierInfo *IdentInfo; 2831 Expr *E; 2832 } U; 2833 }; 2834 2835 /// __builtin_offsetof(type, a.b[123][456].c) 2836 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2837 TypeSourceInfo *TInfo, 2838 OffsetOfComponent *CompPtr, 2839 unsigned NumComponents, 2840 SourceLocation RParenLoc); 2841 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2842 SourceLocation BuiltinLoc, 2843 SourceLocation TypeLoc, 2844 ParsedType ParsedArgTy, 2845 OffsetOfComponent *CompPtr, 2846 unsigned NumComponents, 2847 SourceLocation RParenLoc); 2848 2849 // __builtin_choose_expr(constExpr, expr1, expr2) 2850 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2851 Expr *CondExpr, Expr *LHSExpr, 2852 Expr *RHSExpr, SourceLocation RPLoc); 2853 2854 // __builtin_va_arg(expr, type) 2855 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, 2856 SourceLocation RPLoc); 2857 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E, 2858 TypeSourceInfo *TInfo, SourceLocation RPLoc); 2859 2860 // __null 2861 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2862 2863 bool CheckCaseExpression(Expr *E); 2864 2865 /// \brief Describes the result of an "if-exists" condition check. 2866 enum IfExistsResult { 2867 /// \brief The symbol exists. 2868 IER_Exists, 2869 2870 /// \brief The symbol does not exist. 2871 IER_DoesNotExist, 2872 2873 /// \brief The name is a dependent name, so the results will differ 2874 /// from one instantiation to the next. 2875 IER_Dependent, 2876 2877 /// \brief An error occurred. 2878 IER_Error 2879 }; 2880 2881 IfExistsResult 2882 CheckMicrosoftIfExistsSymbol(Scope *S, CXXScopeSpec &SS, 2883 const DeclarationNameInfo &TargetNameInfo); 2884 2885 IfExistsResult 2886 CheckMicrosoftIfExistsSymbol(Scope *S, SourceLocation KeywordLoc, 2887 bool IsIfExists, CXXScopeSpec &SS, 2888 UnqualifiedId &Name); 2889 2890 StmtResult BuildMSDependentExistsStmt(SourceLocation KeywordLoc, 2891 bool IsIfExists, 2892 NestedNameSpecifierLoc QualifierLoc, 2893 DeclarationNameInfo NameInfo, 2894 Stmt *Nested); 2895 StmtResult ActOnMSDependentExistsStmt(SourceLocation KeywordLoc, 2896 bool IsIfExists, 2897 CXXScopeSpec &SS, UnqualifiedId &Name, 2898 Stmt *Nested); 2899 2900 //===------------------------- "Block" Extension ------------------------===// 2901 2902 /// ActOnBlockStart - This callback is invoked when a block literal is 2903 /// started. 2904 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2905 2906 /// ActOnBlockArguments - This callback allows processing of block arguments. 2907 /// If there are no arguments, this is still invoked. 2908 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2909 2910 /// ActOnBlockError - If there is an error parsing a block, this callback 2911 /// is invoked to pop the information about the block from the action impl. 2912 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2913 2914 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2915 /// literal was successfully completed. ^(int x){...} 2916 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body, 2917 Scope *CurScope); 2918 2919 //===---------------------------- OpenCL Features -----------------------===// 2920 2921 /// __builtin_astype(...) 2922 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, 2923 SourceLocation BuiltinLoc, 2924 SourceLocation RParenLoc); 2925 2926 //===---------------------------- C++ Features --------------------------===// 2927 2928 // Act on C++ namespaces 2929 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2930 SourceLocation NamespaceLoc, 2931 SourceLocation IdentLoc, 2932 IdentifierInfo *Ident, 2933 SourceLocation LBrace, 2934 AttributeList *AttrList); 2935 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2936 2937 NamespaceDecl *getStdNamespace() const; 2938 NamespaceDecl *getOrCreateStdNamespace(); 2939 2940 CXXRecordDecl *getStdBadAlloc() const; 2941 2942 /// \brief Tests whether Ty is an instance of std::initializer_list and, if 2943 /// it is and Element is not NULL, assigns the element type to Element. 2944 bool isStdInitializerList(QualType Ty, QualType *Element); 2945 2946 /// \brief Looks for the std::initializer_list template and instantiates it 2947 /// with Element, or emits an error if it's not found. 2948 /// 2949 /// \returns The instantiated template, or null on error. 2950 QualType BuildStdInitializerList(QualType Element, SourceLocation Loc); 2951 2952 /// \brief Determine whether Ctor is an initializer-list constructor, as 2953 /// defined in [dcl.init.list]p2. 2954 bool isInitListConstructor(const CXXConstructorDecl *Ctor); 2955 2956 Decl *ActOnUsingDirective(Scope *CurScope, 2957 SourceLocation UsingLoc, 2958 SourceLocation NamespcLoc, 2959 CXXScopeSpec &SS, 2960 SourceLocation IdentLoc, 2961 IdentifierInfo *NamespcName, 2962 AttributeList *AttrList); 2963 2964 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2965 2966 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2967 SourceLocation NamespaceLoc, 2968 SourceLocation AliasLoc, 2969 IdentifierInfo *Alias, 2970 CXXScopeSpec &SS, 2971 SourceLocation IdentLoc, 2972 IdentifierInfo *Ident); 2973 2974 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2975 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2976 const LookupResult &PreviousDecls); 2977 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2978 NamedDecl *Target); 2979 2980 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2981 bool isTypeName, 2982 const CXXScopeSpec &SS, 2983 SourceLocation NameLoc, 2984 const LookupResult &Previous); 2985 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2986 const CXXScopeSpec &SS, 2987 SourceLocation NameLoc); 2988 2989 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2990 SourceLocation UsingLoc, 2991 CXXScopeSpec &SS, 2992 const DeclarationNameInfo &NameInfo, 2993 AttributeList *AttrList, 2994 bool IsInstantiation, 2995 bool IsTypeName, 2996 SourceLocation TypenameLoc); 2997 2998 bool CheckInheritingConstructorUsingDecl(UsingDecl *UD); 2999 3000 Decl *ActOnUsingDeclaration(Scope *CurScope, 3001 AccessSpecifier AS, 3002 bool HasUsingKeyword, 3003 SourceLocation UsingLoc, 3004 CXXScopeSpec &SS, 3005 UnqualifiedId &Name, 3006 AttributeList *AttrList, 3007 bool IsTypeName, 3008 SourceLocation TypenameLoc); 3009 Decl *ActOnAliasDeclaration(Scope *CurScope, 3010 AccessSpecifier AS, 3011 MultiTemplateParamsArg TemplateParams, 3012 SourceLocation UsingLoc, 3013 UnqualifiedId &Name, 3014 TypeResult Type); 3015 3016 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 3017 /// and sets it as the initializer for the the passed in VarDecl. 3018 bool InitializeVarWithConstructor(VarDecl *VD, 3019 CXXConstructorDecl *Constructor, 3020 MultiExprArg Exprs, 3021 bool HadMultipleCandidates); 3022 3023 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 3024 /// including handling of its default argument expressions. 3025 /// 3026 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 3027 ExprResult 3028 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 3029 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 3030 bool HadMultipleCandidates, bool RequiresZeroInit, 3031 unsigned ConstructKind, SourceRange ParenRange); 3032 3033 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 3034 // the constructor can be elidable? 3035 ExprResult 3036 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 3037 CXXConstructorDecl *Constructor, bool Elidable, 3038 MultiExprArg Exprs, bool HadMultipleCandidates, 3039 bool RequiresZeroInit, unsigned ConstructKind, 3040 SourceRange ParenRange); 3041 3042 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 3043 /// the default expr if needed. 3044 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 3045 FunctionDecl *FD, 3046 ParmVarDecl *Param); 3047 3048 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 3049 /// constructed variable. 3050 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 3051 3052 /// \brief Helper class that collects exception specifications for 3053 /// implicitly-declared special member functions. 3054 class ImplicitExceptionSpecification { 3055 // Pointer to allow copying 3056 Sema *Self; 3057 // We order exception specifications thus: 3058 // noexcept is the most restrictive, but is only used in C++0x. 3059 // throw() comes next. 3060 // Then a throw(collected exceptions) 3061 // Finally no specification. 3062 // throw(...) is used instead if any called function uses it. 3063 // 3064 // If this exception specification cannot be known yet (for instance, 3065 // because this is the exception specification for a defaulted default 3066 // constructor and we haven't finished parsing the deferred parts of the 3067 // class yet), the C++0x standard does not specify how to behave. We 3068 // record this as an 'unknown' exception specification, which overrules 3069 // any other specification (even 'none', to keep this rule simple). 3070 ExceptionSpecificationType ComputedEST; 3071 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 3072 SmallVector<QualType, 4> Exceptions; 3073 3074 void ClearExceptions() { 3075 ExceptionsSeen.clear(); 3076 Exceptions.clear(); 3077 } 3078 3079 public: 3080 explicit ImplicitExceptionSpecification(Sema &Self) 3081 : Self(&Self), ComputedEST(EST_BasicNoexcept) { 3082 if (!Self.Context.getLangOpts().CPlusPlus0x) 3083 ComputedEST = EST_DynamicNone; 3084 } 3085 3086 /// \brief Get the computed exception specification type. 3087 ExceptionSpecificationType getExceptionSpecType() const { 3088 assert(ComputedEST != EST_ComputedNoexcept && 3089 "noexcept(expr) should not be a possible result"); 3090 return ComputedEST; 3091 } 3092 3093 /// \brief The number of exceptions in the exception specification. 3094 unsigned size() const { return Exceptions.size(); } 3095 3096 /// \brief The set of exceptions in the exception specification. 3097 const QualType *data() const { return Exceptions.data(); } 3098 3099 /// \brief Integrate another called method into the collected data. 3100 void CalledDecl(SourceLocation CallLoc, CXXMethodDecl *Method); 3101 3102 /// \brief Integrate an invoked expression into the collected data. 3103 void CalledExpr(Expr *E); 3104 3105 /// \brief Specify that the exception specification can't be detemined yet. 3106 void SetDelayed() { 3107 ClearExceptions(); 3108 ComputedEST = EST_Delayed; 3109 } 3110 3111 FunctionProtoType::ExtProtoInfo getEPI() const { 3112 FunctionProtoType::ExtProtoInfo EPI; 3113 EPI.ExceptionSpecType = getExceptionSpecType(); 3114 EPI.NumExceptions = size(); 3115 EPI.Exceptions = data(); 3116 return EPI; 3117 } 3118 }; 3119 3120 /// \brief Determine what sort of exception specification a defaulted 3121 /// copy constructor of a class will have. 3122 ImplicitExceptionSpecification 3123 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 3124 3125 /// \brief Determine what sort of exception specification a defaulted 3126 /// default constructor of a class will have, and whether the parameter 3127 /// will be const. 3128 std::pair<ImplicitExceptionSpecification, bool> 3129 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 3130 3131 /// \brief Determine what sort of exception specification a defautled 3132 /// copy assignment operator of a class will have, and whether the 3133 /// parameter will be const. 3134 std::pair<ImplicitExceptionSpecification, bool> 3135 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 3136 3137 /// \brief Determine what sort of exception specification a defaulted move 3138 /// constructor of a class will have. 3139 ImplicitExceptionSpecification 3140 ComputeDefaultedMoveCtorExceptionSpec(CXXRecordDecl *ClassDecl); 3141 3142 /// \brief Determine what sort of exception specification a defaulted move 3143 /// assignment operator of a class will have. 3144 ImplicitExceptionSpecification 3145 ComputeDefaultedMoveAssignmentExceptionSpec(CXXRecordDecl *ClassDecl); 3146 3147 /// \brief Determine what sort of exception specification a defaulted 3148 /// destructor of a class will have. 3149 ImplicitExceptionSpecification 3150 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 3151 3152 /// \brief Check the given exception-specification and update the 3153 /// extended prototype information with the results. 3154 void checkExceptionSpecification(ExceptionSpecificationType EST, 3155 ArrayRef<ParsedType> DynamicExceptions, 3156 ArrayRef<SourceRange> DynamicExceptionRanges, 3157 Expr *NoexceptExpr, 3158 llvm::SmallVectorImpl<QualType> &Exceptions, 3159 FunctionProtoType::ExtProtoInfo &EPI); 3160 3161 /// \brief Add an exception-specification to the given member function 3162 /// (or member function template). The exception-specification was parsed 3163 /// after the method itself was declared. 3164 void actOnDelayedExceptionSpecification(Decl *Method, 3165 ExceptionSpecificationType EST, 3166 SourceRange SpecificationRange, 3167 ArrayRef<ParsedType> DynamicExceptions, 3168 ArrayRef<SourceRange> DynamicExceptionRanges, 3169 Expr *NoexceptExpr); 3170 3171 /// \brief Determine if a special member function should have a deleted 3172 /// definition when it is defaulted. 3173 bool ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM, 3174 bool Diagnose = false); 3175 3176 /// \brief Declare the implicit default constructor for the given class. 3177 /// 3178 /// \param ClassDecl The class declaration into which the implicit 3179 /// default constructor will be added. 3180 /// 3181 /// \returns The implicitly-declared default constructor. 3182 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 3183 CXXRecordDecl *ClassDecl); 3184 3185 /// DefineImplicitDefaultConstructor - Checks for feasibility of 3186 /// defining this constructor as the default constructor. 3187 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 3188 CXXConstructorDecl *Constructor); 3189 3190 /// \brief Declare the implicit destructor for the given class. 3191 /// 3192 /// \param ClassDecl The class declaration into which the implicit 3193 /// destructor will be added. 3194 /// 3195 /// \returns The implicitly-declared destructor. 3196 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 3197 3198 /// DefineImplicitDestructor - Checks for feasibility of 3199 /// defining this destructor as the default destructor. 3200 void DefineImplicitDestructor(SourceLocation CurrentLocation, 3201 CXXDestructorDecl *Destructor); 3202 3203 /// \brief Build an exception spec for destructors that don't have one. 3204 /// 3205 /// C++11 says that user-defined destructors with no exception spec get one 3206 /// that looks as if the destructor was implicitly declared. 3207 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 3208 CXXDestructorDecl *Destructor); 3209 3210 /// \brief Declare all inherited constructors for the given class. 3211 /// 3212 /// \param ClassDecl The class declaration into which the inherited 3213 /// constructors will be added. 3214 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 3215 3216 /// \brief Declare the implicit copy constructor for the given class. 3217 /// 3218 /// \param ClassDecl The class declaration into which the implicit 3219 /// copy constructor will be added. 3220 /// 3221 /// \returns The implicitly-declared copy constructor. 3222 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 3223 3224 /// DefineImplicitCopyConstructor - Checks for feasibility of 3225 /// defining this constructor as the copy constructor. 3226 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 3227 CXXConstructorDecl *Constructor); 3228 3229 /// \brief Declare the implicit move constructor for the given class. 3230 /// 3231 /// \param ClassDecl The Class declaration into which the implicit 3232 /// move constructor will be added. 3233 /// 3234 /// \returns The implicitly-declared move constructor, or NULL if it wasn't 3235 /// declared. 3236 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl); 3237 3238 /// DefineImplicitMoveConstructor - Checks for feasibility of 3239 /// defining this constructor as the move constructor. 3240 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation, 3241 CXXConstructorDecl *Constructor); 3242 3243 /// \brief Declare the implicit copy assignment operator for the given class. 3244 /// 3245 /// \param ClassDecl The class declaration into which the implicit 3246 /// copy assignment operator will be added. 3247 /// 3248 /// \returns The implicitly-declared copy assignment operator. 3249 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 3250 3251 /// \brief Defines an implicitly-declared copy assignment operator. 3252 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 3253 CXXMethodDecl *MethodDecl); 3254 3255 /// \brief Declare the implicit move assignment operator for the given class. 3256 /// 3257 /// \param ClassDecl The Class declaration into which the implicit 3258 /// move assignment operator will be added. 3259 /// 3260 /// \returns The implicitly-declared move assignment operator, or NULL if it 3261 /// wasn't declared. 3262 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl); 3263 3264 /// \brief Defines an implicitly-declared move assignment operator. 3265 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation, 3266 CXXMethodDecl *MethodDecl); 3267 3268 /// \brief Force the declaration of any implicitly-declared members of this 3269 /// class. 3270 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 3271 3272 /// \brief Determine whether the given function is an implicitly-deleted 3273 /// special member function. 3274 bool isImplicitlyDeleted(FunctionDecl *FD); 3275 3276 /// \brief Check whether 'this' shows up in the type of a static member 3277 /// function after the (naturally empty) cv-qualifier-seq would be. 3278 /// 3279 /// \returns true if an error occurred. 3280 bool checkThisInStaticMemberFunctionType(CXXMethodDecl *Method); 3281 3282 /// \brief Whether this' shows up in the exception specification of a static 3283 /// member function. 3284 bool checkThisInStaticMemberFunctionExceptionSpec(CXXMethodDecl *Method); 3285 3286 /// \brief Check whether 'this' shows up in the attributes of the given 3287 /// static member function. 3288 /// 3289 /// \returns true if an error occurred. 3290 bool checkThisInStaticMemberFunctionAttributes(CXXMethodDecl *Method); 3291 3292 /// MaybeBindToTemporary - If the passed in expression has a record type with 3293 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 3294 /// it simply returns the passed in expression. 3295 ExprResult MaybeBindToTemporary(Expr *E); 3296 3297 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 3298 MultiExprArg ArgsPtr, 3299 SourceLocation Loc, 3300 ASTOwningVector<Expr*> &ConvertedArgs, 3301 bool AllowExplicit = false); 3302 3303 ParsedType getDestructorName(SourceLocation TildeLoc, 3304 IdentifierInfo &II, SourceLocation NameLoc, 3305 Scope *S, CXXScopeSpec &SS, 3306 ParsedType ObjectType, 3307 bool EnteringContext); 3308 3309 ParsedType getDestructorType(const DeclSpec& DS, ParsedType ObjectType); 3310 3311 // Checks that reinterpret casts don't have undefined behavior. 3312 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 3313 bool IsDereference, SourceRange Range); 3314 3315 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 3316 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 3317 tok::TokenKind Kind, 3318 SourceLocation LAngleBracketLoc, 3319 Declarator &D, 3320 SourceLocation RAngleBracketLoc, 3321 SourceLocation LParenLoc, 3322 Expr *E, 3323 SourceLocation RParenLoc); 3324 3325 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 3326 tok::TokenKind Kind, 3327 TypeSourceInfo *Ty, 3328 Expr *E, 3329 SourceRange AngleBrackets, 3330 SourceRange Parens); 3331 3332 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3333 SourceLocation TypeidLoc, 3334 TypeSourceInfo *Operand, 3335 SourceLocation RParenLoc); 3336 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3337 SourceLocation TypeidLoc, 3338 Expr *Operand, 3339 SourceLocation RParenLoc); 3340 3341 /// ActOnCXXTypeid - Parse typeid( something ). 3342 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 3343 SourceLocation LParenLoc, bool isType, 3344 void *TyOrExpr, 3345 SourceLocation RParenLoc); 3346 3347 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3348 SourceLocation TypeidLoc, 3349 TypeSourceInfo *Operand, 3350 SourceLocation RParenLoc); 3351 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3352 SourceLocation TypeidLoc, 3353 Expr *Operand, 3354 SourceLocation RParenLoc); 3355 3356 /// ActOnCXXUuidof - Parse __uuidof( something ). 3357 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 3358 SourceLocation LParenLoc, bool isType, 3359 void *TyOrExpr, 3360 SourceLocation RParenLoc); 3361 3362 3363 //// ActOnCXXThis - Parse 'this' pointer. 3364 ExprResult ActOnCXXThis(SourceLocation loc); 3365 3366 /// \brief Try to retrieve the type of the 'this' pointer. 3367 /// 3368 /// \param Capture If true, capture 'this' in this context. 3369 /// 3370 /// \returns The type of 'this', if possible. Otherwise, returns a NULL type. 3371 QualType getCurrentThisType(); 3372 3373 /// \brief When non-NULL, the C++ 'this' expression is allowed despite the 3374 /// current context not being a non-static member function. In such cases, 3375 /// this provides the type used for 'this'. 3376 QualType CXXThisTypeOverride; 3377 3378 /// \brief RAII object used to temporarily allow the C++ 'this' expression 3379 /// to be used, with the given qualifiers on the current class type. 3380 class CXXThisScopeRAII { 3381 Sema &S; 3382 QualType OldCXXThisTypeOverride; 3383 bool Enabled; 3384 3385 public: 3386 /// \brief Introduce a new scope where 'this' may be allowed (when enabled), 3387 /// using the given declaration (which is either a class template or a 3388 /// class) along with the given qualifiers. 3389 /// along with the qualifiers placed on '*this'. 3390 CXXThisScopeRAII(Sema &S, Decl *ContextDecl, unsigned CXXThisTypeQuals, 3391 bool Enabled = true); 3392 3393 ~CXXThisScopeRAII(); 3394 }; 3395 3396 /// \brief Make sure the value of 'this' is actually available in the current 3397 /// context, if it is a potentially evaluated context. 3398 /// 3399 /// \param Loc The location at which the capture of 'this' occurs. 3400 /// 3401 /// \param Explicit Whether 'this' is explicitly captured in a lambda 3402 /// capture list. 3403 void CheckCXXThisCapture(SourceLocation Loc, bool Explicit = false); 3404 3405 /// \brief Determine whether the given type is the type of *this that is used 3406 /// outside of the body of a member function for a type that is currently 3407 /// being defined. 3408 bool isThisOutsideMemberFunctionBody(QualType BaseType); 3409 3410 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 3411 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 3412 3413 3414 /// ActOnObjCBoolLiteral - Parse {__objc_yes,__objc_no} literals. 3415 ExprResult ActOnObjCBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 3416 3417 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 3418 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 3419 3420 //// ActOnCXXThrow - Parse throw expressions. 3421 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 3422 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 3423 bool IsThrownVarInScope); 3424 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 3425 bool IsThrownVarInScope); 3426 3427 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 3428 /// Can be interpreted either as function-style casting ("int(x)") 3429 /// or class type construction ("ClassType(x,y,z)") 3430 /// or creation of a value-initialized type ("int()"). 3431 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 3432 SourceLocation LParenLoc, 3433 MultiExprArg Exprs, 3434 SourceLocation RParenLoc); 3435 3436 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 3437 SourceLocation LParenLoc, 3438 MultiExprArg Exprs, 3439 SourceLocation RParenLoc); 3440 3441 /// ActOnCXXNew - Parsed a C++ 'new' expression. 3442 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 3443 SourceLocation PlacementLParen, 3444 MultiExprArg PlacementArgs, 3445 SourceLocation PlacementRParen, 3446 SourceRange TypeIdParens, Declarator &D, 3447 Expr *Initializer); 3448 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 3449 SourceLocation PlacementLParen, 3450 MultiExprArg PlacementArgs, 3451 SourceLocation PlacementRParen, 3452 SourceRange TypeIdParens, 3453 QualType AllocType, 3454 TypeSourceInfo *AllocTypeInfo, 3455 Expr *ArraySize, 3456 SourceRange DirectInitRange, 3457 Expr *Initializer, 3458 bool TypeMayContainAuto = true); 3459 3460 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 3461 SourceRange R); 3462 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 3463 bool UseGlobal, QualType AllocType, bool IsArray, 3464 Expr **PlaceArgs, unsigned NumPlaceArgs, 3465 FunctionDecl *&OperatorNew, 3466 FunctionDecl *&OperatorDelete); 3467 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 3468 DeclarationName Name, Expr** Args, 3469 unsigned NumArgs, DeclContext *Ctx, 3470 bool AllowMissing, FunctionDecl *&Operator, 3471 bool Diagnose = true); 3472 void DeclareGlobalNewDelete(); 3473 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 3474 QualType Argument, 3475 bool addMallocAttr = false); 3476 3477 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 3478 DeclarationName Name, FunctionDecl* &Operator, 3479 bool Diagnose = true); 3480 3481 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 3482 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 3483 bool UseGlobal, bool ArrayForm, 3484 Expr *Operand); 3485 3486 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 3487 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 3488 SourceLocation StmtLoc, 3489 bool ConvertToBoolean); 3490 3491 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 3492 Expr *Operand, SourceLocation RParen); 3493 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 3494 SourceLocation RParen); 3495 3496 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 3497 /// pseudo-functions. 3498 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 3499 SourceLocation KWLoc, 3500 ParsedType Ty, 3501 SourceLocation RParen); 3502 3503 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3504 SourceLocation KWLoc, 3505 TypeSourceInfo *T, 3506 SourceLocation RParen); 3507 3508 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3509 /// pseudo-functions. 3510 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3511 SourceLocation KWLoc, 3512 ParsedType LhsTy, 3513 ParsedType RhsTy, 3514 SourceLocation RParen); 3515 3516 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3517 SourceLocation KWLoc, 3518 TypeSourceInfo *LhsT, 3519 TypeSourceInfo *RhsT, 3520 SourceLocation RParen); 3521 3522 /// \brief Parsed one of the type trait support pseudo-functions. 3523 ExprResult ActOnTypeTrait(TypeTrait Kind, SourceLocation KWLoc, 3524 ArrayRef<ParsedType> Args, 3525 SourceLocation RParenLoc); 3526 ExprResult BuildTypeTrait(TypeTrait Kind, SourceLocation KWLoc, 3527 ArrayRef<TypeSourceInfo *> Args, 3528 SourceLocation RParenLoc); 3529 3530 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3531 /// pseudo-functions. 3532 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3533 SourceLocation KWLoc, 3534 ParsedType LhsTy, 3535 Expr *DimExpr, 3536 SourceLocation RParen); 3537 3538 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3539 SourceLocation KWLoc, 3540 TypeSourceInfo *TSInfo, 3541 Expr *DimExpr, 3542 SourceLocation RParen); 3543 3544 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3545 /// pseudo-functions. 3546 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3547 SourceLocation KWLoc, 3548 Expr *Queried, 3549 SourceLocation RParen); 3550 3551 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3552 SourceLocation KWLoc, 3553 Expr *Queried, 3554 SourceLocation RParen); 3555 3556 ExprResult ActOnStartCXXMemberReference(Scope *S, 3557 Expr *Base, 3558 SourceLocation OpLoc, 3559 tok::TokenKind OpKind, 3560 ParsedType &ObjectType, 3561 bool &MayBePseudoDestructor); 3562 3563 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3564 3565 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3566 SourceLocation OpLoc, 3567 tok::TokenKind OpKind, 3568 const CXXScopeSpec &SS, 3569 TypeSourceInfo *ScopeType, 3570 SourceLocation CCLoc, 3571 SourceLocation TildeLoc, 3572 PseudoDestructorTypeStorage DestroyedType, 3573 bool HasTrailingLParen); 3574 3575 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3576 SourceLocation OpLoc, 3577 tok::TokenKind OpKind, 3578 CXXScopeSpec &SS, 3579 UnqualifiedId &FirstTypeName, 3580 SourceLocation CCLoc, 3581 SourceLocation TildeLoc, 3582 UnqualifiedId &SecondTypeName, 3583 bool HasTrailingLParen); 3584 3585 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3586 SourceLocation OpLoc, 3587 tok::TokenKind OpKind, 3588 SourceLocation TildeLoc, 3589 const DeclSpec& DS, 3590 bool HasTrailingLParen); 3591 3592 /// MaybeCreateExprWithCleanups - If the current full-expression 3593 /// requires any cleanups, surround it with a ExprWithCleanups node. 3594 /// Otherwise, just returns the passed-in expression. 3595 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3596 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3597 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3598 3599 ExprResult ActOnFinishFullExpr(Expr *Expr); 3600 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3601 3602 // Marks SS invalid if it represents an incomplete type. 3603 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3604 3605 DeclContext *computeDeclContext(QualType T); 3606 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3607 bool EnteringContext = false); 3608 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3609 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3610 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3611 3612 /// \brief The parser has parsed a global nested-name-specifier '::'. 3613 /// 3614 /// \param S The scope in which this nested-name-specifier occurs. 3615 /// 3616 /// \param CCLoc The location of the '::'. 3617 /// 3618 /// \param SS The nested-name-specifier, which will be updated in-place 3619 /// to reflect the parsed nested-name-specifier. 3620 /// 3621 /// \returns true if an error occurred, false otherwise. 3622 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3623 CXXScopeSpec &SS); 3624 3625 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3626 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3627 3628 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3629 SourceLocation IdLoc, 3630 IdentifierInfo &II, 3631 ParsedType ObjectType); 3632 3633 bool BuildCXXNestedNameSpecifier(Scope *S, 3634 IdentifierInfo &Identifier, 3635 SourceLocation IdentifierLoc, 3636 SourceLocation CCLoc, 3637 QualType ObjectType, 3638 bool EnteringContext, 3639 CXXScopeSpec &SS, 3640 NamedDecl *ScopeLookupResult, 3641 bool ErrorRecoveryLookup); 3642 3643 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3644 /// 3645 /// \param S The scope in which this nested-name-specifier occurs. 3646 /// 3647 /// \param Identifier The identifier preceding the '::'. 3648 /// 3649 /// \param IdentifierLoc The location of the identifier. 3650 /// 3651 /// \param CCLoc The location of the '::'. 3652 /// 3653 /// \param ObjectType The type of the object, if we're parsing 3654 /// nested-name-specifier in a member access expression. 3655 /// 3656 /// \param EnteringContext Whether we're entering the context nominated by 3657 /// this nested-name-specifier. 3658 /// 3659 /// \param SS The nested-name-specifier, which is both an input 3660 /// parameter (the nested-name-specifier before this type) and an 3661 /// output parameter (containing the full nested-name-specifier, 3662 /// including this new type). 3663 /// 3664 /// \returns true if an error occurred, false otherwise. 3665 bool ActOnCXXNestedNameSpecifier(Scope *S, 3666 IdentifierInfo &Identifier, 3667 SourceLocation IdentifierLoc, 3668 SourceLocation CCLoc, 3669 ParsedType ObjectType, 3670 bool EnteringContext, 3671 CXXScopeSpec &SS); 3672 3673 ExprResult ActOnDecltypeExpression(Expr *E); 3674 3675 bool ActOnCXXNestedNameSpecifierDecltype(CXXScopeSpec &SS, 3676 const DeclSpec &DS, 3677 SourceLocation ColonColonLoc); 3678 3679 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3680 IdentifierInfo &Identifier, 3681 SourceLocation IdentifierLoc, 3682 SourceLocation ColonLoc, 3683 ParsedType ObjectType, 3684 bool EnteringContext); 3685 3686 /// \brief The parser has parsed a nested-name-specifier 3687 /// 'template[opt] template-name < template-args >::'. 3688 /// 3689 /// \param S The scope in which this nested-name-specifier occurs. 3690 /// 3691 /// \param SS The nested-name-specifier, which is both an input 3692 /// parameter (the nested-name-specifier before this type) and an 3693 /// output parameter (containing the full nested-name-specifier, 3694 /// including this new type). 3695 /// 3696 /// \param TemplateKWLoc the location of the 'template' keyword, if any. 3697 /// \param TemplateName The template name. 3698 /// \param TemplateNameLoc The location of the template name. 3699 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3700 /// \param TemplateArgs The template arguments. 3701 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3702 /// \param CCLoc The location of the '::'. 3703 /// 3704 /// \param EnteringContext Whether we're entering the context of the 3705 /// nested-name-specifier. 3706 /// 3707 /// 3708 /// \returns true if an error occurred, false otherwise. 3709 bool ActOnCXXNestedNameSpecifier(Scope *S, 3710 CXXScopeSpec &SS, 3711 SourceLocation TemplateKWLoc, 3712 TemplateTy Template, 3713 SourceLocation TemplateNameLoc, 3714 SourceLocation LAngleLoc, 3715 ASTTemplateArgsPtr TemplateArgs, 3716 SourceLocation RAngleLoc, 3717 SourceLocation CCLoc, 3718 bool EnteringContext); 3719 3720 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3721 /// that the parser can use later to reconstruct the given 3722 /// nested-name-specifier. 3723 /// 3724 /// \param SS A nested-name-specifier. 3725 /// 3726 /// \returns A pointer containing all of the information in the 3727 /// nested-name-specifier \p SS. 3728 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3729 3730 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3731 /// the nested-name-specifier structure. 3732 /// 3733 /// \param Annotation The annotation pointer, produced by 3734 /// \c SaveNestedNameSpecifierAnnotation(). 3735 /// 3736 /// \param AnnotationRange The source range corresponding to the annotation. 3737 /// 3738 /// \param SS The nested-name-specifier that will be updated with the contents 3739 /// of the annotation pointer. 3740 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3741 SourceRange AnnotationRange, 3742 CXXScopeSpec &SS); 3743 3744 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3745 3746 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3747 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3748 /// After this method is called, according to [C++ 3.4.3p3], names should be 3749 /// looked up in the declarator-id's scope, until the declarator is parsed and 3750 /// ActOnCXXExitDeclaratorScope is called. 3751 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3752 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3753 3754 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3755 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3756 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3757 /// Used to indicate that names should revert to being looked up in the 3758 /// defining scope. 3759 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3760 3761 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3762 /// initializer for the declaration 'Dcl'. 3763 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3764 /// static data member of class X, names should be looked up in the scope of 3765 /// class X. 3766 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3767 3768 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3769 /// initializer for the declaration 'Dcl'. 3770 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3771 3772 /// \brief Create a new lambda closure type. 3773 CXXRecordDecl *createLambdaClosureType(SourceRange IntroducerRange, 3774 bool KnownDependent = false); 3775 3776 /// \brief Start the definition of a lambda expression. 3777 CXXMethodDecl *startLambdaDefinition(CXXRecordDecl *Class, 3778 SourceRange IntroducerRange, 3779 TypeSourceInfo *MethodType, 3780 SourceLocation EndLoc, 3781 llvm::ArrayRef<ParmVarDecl *> Params, 3782 llvm::Optional<unsigned> ManglingNumber 3783 = llvm::Optional<unsigned>(), 3784 Decl *ContextDecl = 0); 3785 3786 /// \brief Introduce the scope for a lambda expression. 3787 sema::LambdaScopeInfo *enterLambdaScope(CXXMethodDecl *CallOperator, 3788 SourceRange IntroducerRange, 3789 LambdaCaptureDefault CaptureDefault, 3790 bool ExplicitParams, 3791 bool ExplicitResultType, 3792 bool Mutable); 3793 3794 /// \brief Note that we have finished the explicit captures for the 3795 /// given lambda. 3796 void finishLambdaExplicitCaptures(sema::LambdaScopeInfo *LSI); 3797 3798 /// \brief Introduce the lambda parameters into scope. 3799 void addLambdaParameters(CXXMethodDecl *CallOperator, Scope *CurScope); 3800 3801 /// ActOnStartOfLambdaDefinition - This is called just before we start 3802 /// parsing the body of a lambda; it analyzes the explicit captures and 3803 /// arguments, and sets up various data-structures for the body of the 3804 /// lambda. 3805 void ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro, 3806 Declarator &ParamInfo, Scope *CurScope); 3807 3808 /// ActOnLambdaError - If there is an error parsing a lambda, this callback 3809 /// is invoked to pop the information about the lambda. 3810 void ActOnLambdaError(SourceLocation StartLoc, Scope *CurScope, 3811 bool IsInstantiation = false); 3812 3813 /// ActOnLambdaExpr - This is called when the body of a lambda expression 3814 /// was successfully completed. 3815 ExprResult ActOnLambdaExpr(SourceLocation StartLoc, Stmt *Body, 3816 Scope *CurScope, 3817 bool IsInstantiation = false); 3818 3819 /// \brief Define the "body" of the conversion from a lambda object to a 3820 /// function pointer. 3821 /// 3822 /// This routine doesn't actually define a sensible body; rather, it fills 3823 /// in the initialization expression needed to copy the lambda object into 3824 /// the block, and IR generation actually generates the real body of the 3825 /// block pointer conversion. 3826 void DefineImplicitLambdaToFunctionPointerConversion( 3827 SourceLocation CurrentLoc, CXXConversionDecl *Conv); 3828 3829 /// \brief Define the "body" of the conversion from a lambda object to a 3830 /// block pointer. 3831 /// 3832 /// This routine doesn't actually define a sensible body; rather, it fills 3833 /// in the initialization expression needed to copy the lambda object into 3834 /// the block, and IR generation actually generates the real body of the 3835 /// block pointer conversion. 3836 void DefineImplicitLambdaToBlockPointerConversion(SourceLocation CurrentLoc, 3837 CXXConversionDecl *Conv); 3838 3839 ExprResult BuildBlockForLambdaConversion(SourceLocation CurrentLocation, 3840 SourceLocation ConvLocation, 3841 CXXConversionDecl *Conv, 3842 Expr *Src); 3843 3844 // ParseObjCStringLiteral - Parse Objective-C string literals. 3845 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3846 Expr **Strings, 3847 unsigned NumStrings); 3848 3849 ExprResult BuildObjCStringLiteral(SourceLocation AtLoc, StringLiteral *S); 3850 3851 /// BuildObjCNumericLiteral - builds an ObjCNumericLiteral AST node for the 3852 /// numeric literal expression. Type of the expression will be "NSNumber *" 3853 /// or "id" if NSNumber is unavailable. 3854 ExprResult BuildObjCNumericLiteral(SourceLocation AtLoc, Expr *Number); 3855 ExprResult ActOnObjCBoolLiteral(SourceLocation AtLoc, SourceLocation ValueLoc, 3856 bool Value); 3857 ExprResult BuildObjCArrayLiteral(SourceRange SR, MultiExprArg Elements); 3858 3859 ExprResult BuildObjCSubscriptExpression(SourceLocation RB, Expr *BaseExpr, 3860 Expr *IndexExpr, 3861 ObjCMethodDecl *getterMethod, 3862 ObjCMethodDecl *setterMethod); 3863 3864 ExprResult BuildObjCDictionaryLiteral(SourceRange SR, 3865 ObjCDictionaryElement *Elements, 3866 unsigned NumElements); 3867 3868 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3869 TypeSourceInfo *EncodedTypeInfo, 3870 SourceLocation RParenLoc); 3871 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3872 CXXConversionDecl *Method, 3873 bool HadMultipleCandidates); 3874 3875 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3876 SourceLocation EncodeLoc, 3877 SourceLocation LParenLoc, 3878 ParsedType Ty, 3879 SourceLocation RParenLoc); 3880 3881 // ParseObjCSelectorExpression - Build selector expression for @selector 3882 ExprResult ParseObjCSelectorExpression(Selector Sel, 3883 SourceLocation AtLoc, 3884 SourceLocation SelLoc, 3885 SourceLocation LParenLoc, 3886 SourceLocation RParenLoc); 3887 3888 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3889 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3890 SourceLocation AtLoc, 3891 SourceLocation ProtoLoc, 3892 SourceLocation LParenLoc, 3893 SourceLocation RParenLoc); 3894 3895 //===--------------------------------------------------------------------===// 3896 // C++ Declarations 3897 // 3898 Decl *ActOnStartLinkageSpecification(Scope *S, 3899 SourceLocation ExternLoc, 3900 SourceLocation LangLoc, 3901 StringRef Lang, 3902 SourceLocation LBraceLoc); 3903 Decl *ActOnFinishLinkageSpecification(Scope *S, 3904 Decl *LinkageSpec, 3905 SourceLocation RBraceLoc); 3906 3907 3908 //===--------------------------------------------------------------------===// 3909 // C++ Classes 3910 // 3911 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3912 const CXXScopeSpec *SS = 0); 3913 3914 bool ActOnAccessSpecifier(AccessSpecifier Access, 3915 SourceLocation ASLoc, 3916 SourceLocation ColonLoc, 3917 AttributeList *Attrs = 0); 3918 3919 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3920 Declarator &D, 3921 MultiTemplateParamsArg TemplateParameterLists, 3922 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3923 bool HasDeferredInit); 3924 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3925 Expr *Init); 3926 3927 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3928 Scope *S, 3929 CXXScopeSpec &SS, 3930 IdentifierInfo *MemberOrBase, 3931 ParsedType TemplateTypeTy, 3932 const DeclSpec &DS, 3933 SourceLocation IdLoc, 3934 SourceLocation LParenLoc, 3935 Expr **Args, unsigned NumArgs, 3936 SourceLocation RParenLoc, 3937 SourceLocation EllipsisLoc); 3938 3939 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3940 Scope *S, 3941 CXXScopeSpec &SS, 3942 IdentifierInfo *MemberOrBase, 3943 ParsedType TemplateTypeTy, 3944 const DeclSpec &DS, 3945 SourceLocation IdLoc, 3946 Expr *InitList, 3947 SourceLocation EllipsisLoc); 3948 3949 MemInitResult BuildMemInitializer(Decl *ConstructorD, 3950 Scope *S, 3951 CXXScopeSpec &SS, 3952 IdentifierInfo *MemberOrBase, 3953 ParsedType TemplateTypeTy, 3954 const DeclSpec &DS, 3955 SourceLocation IdLoc, 3956 Expr *Init, 3957 SourceLocation EllipsisLoc); 3958 3959 MemInitResult BuildMemberInitializer(ValueDecl *Member, 3960 Expr *Init, 3961 SourceLocation IdLoc); 3962 3963 MemInitResult BuildBaseInitializer(QualType BaseType, 3964 TypeSourceInfo *BaseTInfo, 3965 Expr *Init, 3966 CXXRecordDecl *ClassDecl, 3967 SourceLocation EllipsisLoc); 3968 3969 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3970 Expr *Init, 3971 CXXRecordDecl *ClassDecl); 3972 3973 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3974 CXXCtorInitializer *Initializer); 3975 3976 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3977 CXXCtorInitializer **Initializers, 3978 unsigned NumInitializers, bool AnyErrors); 3979 3980 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3981 3982 3983 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3984 /// mark all the non-trivial destructors of its members and bases as 3985 /// referenced. 3986 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3987 CXXRecordDecl *Record); 3988 3989 /// \brief The list of classes whose vtables have been used within 3990 /// this translation unit, and the source locations at which the 3991 /// first use occurred. 3992 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3993 3994 /// \brief The list of vtables that are required but have not yet been 3995 /// materialized. 3996 SmallVector<VTableUse, 16> VTableUses; 3997 3998 /// \brief The set of classes whose vtables have been used within 3999 /// this translation unit, and a bit that will be true if the vtable is 4000 /// required to be emitted (otherwise, it should be emitted only if needed 4001 /// by code generation). 4002 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 4003 4004 /// \brief Load any externally-stored vtable uses. 4005 void LoadExternalVTableUses(); 4006 4007 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 4008 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 4009 DynamicClassesType; 4010 4011 /// \brief A list of all of the dynamic classes in this translation 4012 /// unit. 4013 DynamicClassesType DynamicClasses; 4014 4015 /// \brief Note that the vtable for the given class was used at the 4016 /// given location. 4017 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 4018 bool DefinitionRequired = false); 4019 4020 /// MarkVirtualMembersReferenced - Will mark all members of the given 4021 /// CXXRecordDecl referenced. 4022 void MarkVirtualMembersReferenced(SourceLocation Loc, 4023 const CXXRecordDecl *RD); 4024 4025 /// \brief Define all of the vtables that have been used in this 4026 /// translation unit and reference any virtual members used by those 4027 /// vtables. 4028 /// 4029 /// \returns true if any work was done, false otherwise. 4030 bool DefineUsedVTables(); 4031 4032 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 4033 4034 void ActOnMemInitializers(Decl *ConstructorDecl, 4035 SourceLocation ColonLoc, 4036 CXXCtorInitializer **MemInits, 4037 unsigned NumMemInits, 4038 bool AnyErrors); 4039 4040 void CheckCompletedCXXClass(CXXRecordDecl *Record); 4041 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 4042 Decl *TagDecl, 4043 SourceLocation LBrac, 4044 SourceLocation RBrac, 4045 AttributeList *AttrList); 4046 4047 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 4048 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 4049 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 4050 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 4051 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 4052 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 4053 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 4054 void ActOnFinishDelayedMemberInitializers(Decl *Record); 4055 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 4056 bool IsInsideALocalClassWithinATemplateFunction(); 4057 4058 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 4059 Expr *AssertExpr, 4060 Expr *AssertMessageExpr, 4061 SourceLocation RParenLoc); 4062 4063 FriendDecl *CheckFriendTypeDecl(SourceLocation Loc, 4064 SourceLocation FriendLoc, 4065 TypeSourceInfo *TSInfo); 4066 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 4067 MultiTemplateParamsArg TemplateParams); 4068 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, 4069 MultiTemplateParamsArg TemplateParams); 4070 4071 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 4072 StorageClass& SC); 4073 void CheckConstructor(CXXConstructorDecl *Constructor); 4074 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 4075 StorageClass& SC); 4076 bool CheckDestructor(CXXDestructorDecl *Destructor); 4077 void CheckConversionDeclarator(Declarator &D, QualType &R, 4078 StorageClass& SC); 4079 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 4080 4081 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 4082 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 4083 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 4084 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 4085 void CheckExplicitlyDefaultedMoveConstructor(CXXConstructorDecl *Ctor); 4086 void CheckExplicitlyDefaultedMoveAssignment(CXXMethodDecl *Method); 4087 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 4088 4089 //===--------------------------------------------------------------------===// 4090 // C++ Derived Classes 4091 // 4092 4093 /// ActOnBaseSpecifier - Parsed a base specifier 4094 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 4095 SourceRange SpecifierRange, 4096 bool Virtual, AccessSpecifier Access, 4097 TypeSourceInfo *TInfo, 4098 SourceLocation EllipsisLoc); 4099 4100 BaseResult ActOnBaseSpecifier(Decl *classdecl, 4101 SourceRange SpecifierRange, 4102 bool Virtual, AccessSpecifier Access, 4103 ParsedType basetype, 4104 SourceLocation BaseLoc, 4105 SourceLocation EllipsisLoc); 4106 4107 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 4108 unsigned NumBases); 4109 void ActOnBaseSpecifiers(Decl *ClassDecl, CXXBaseSpecifier **Bases, 4110 unsigned NumBases); 4111 4112 bool IsDerivedFrom(QualType Derived, QualType Base); 4113 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 4114 4115 // FIXME: I don't like this name. 4116 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 4117 4118 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 4119 4120 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 4121 SourceLocation Loc, SourceRange Range, 4122 CXXCastPath *BasePath = 0, 4123 bool IgnoreAccess = false); 4124 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 4125 unsigned InaccessibleBaseID, 4126 unsigned AmbigiousBaseConvID, 4127 SourceLocation Loc, SourceRange Range, 4128 DeclarationName Name, 4129 CXXCastPath *BasePath); 4130 4131 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 4132 4133 /// CheckOverridingFunctionReturnType - Checks whether the return types are 4134 /// covariant, according to C++ [class.virtual]p5. 4135 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 4136 const CXXMethodDecl *Old); 4137 4138 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 4139 /// spec is a subset of base spec. 4140 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 4141 const CXXMethodDecl *Old); 4142 4143 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 4144 4145 /// CheckOverrideControl - Check C++0x override control semantics. 4146 void CheckOverrideControl(const Decl *D); 4147 4148 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 4149 /// overrides a virtual member function marked 'final', according to 4150 /// C++0x [class.virtual]p3. 4151 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 4152 const CXXMethodDecl *Old); 4153 4154 4155 //===--------------------------------------------------------------------===// 4156 // C++ Access Control 4157 // 4158 4159 enum AccessResult { 4160 AR_accessible, 4161 AR_inaccessible, 4162 AR_dependent, 4163 AR_delayed 4164 }; 4165 4166 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 4167 NamedDecl *PrevMemberDecl, 4168 AccessSpecifier LexicalAS); 4169 4170 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 4171 DeclAccessPair FoundDecl); 4172 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 4173 DeclAccessPair FoundDecl); 4174 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 4175 SourceRange PlacementRange, 4176 CXXRecordDecl *NamingClass, 4177 DeclAccessPair FoundDecl, 4178 bool Diagnose = true); 4179 AccessResult CheckConstructorAccess(SourceLocation Loc, 4180 CXXConstructorDecl *D, 4181 const InitializedEntity &Entity, 4182 AccessSpecifier Access, 4183 bool IsCopyBindingRefToTemp = false); 4184 AccessResult CheckConstructorAccess(SourceLocation Loc, 4185 CXXConstructorDecl *D, 4186 const InitializedEntity &Entity, 4187 AccessSpecifier Access, 4188 const PartialDiagnostic &PDiag); 4189 AccessResult CheckDestructorAccess(SourceLocation Loc, 4190 CXXDestructorDecl *Dtor, 4191 const PartialDiagnostic &PDiag, 4192 QualType objectType = QualType()); 4193 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 4194 NamedDecl *D, 4195 const PartialDiagnostic &PDiag); 4196 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 4197 Expr *ObjectExpr, 4198 Expr *ArgExpr, 4199 DeclAccessPair FoundDecl); 4200 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 4201 DeclAccessPair FoundDecl); 4202 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 4203 QualType Base, QualType Derived, 4204 const CXXBasePath &Path, 4205 unsigned DiagID, 4206 bool ForceCheck = false, 4207 bool ForceUnprivileged = false); 4208 void CheckLookupAccess(const LookupResult &R); 4209 bool IsSimplyAccessible(NamedDecl *decl, DeclContext *Ctx); 4210 bool isSpecialMemberAccessibleForDeletion(CXXMethodDecl *decl, 4211 AccessSpecifier access, 4212 QualType objectType); 4213 4214 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 4215 const MultiLevelTemplateArgumentList &TemplateArgs); 4216 void PerformDependentDiagnostics(const DeclContext *Pattern, 4217 const MultiLevelTemplateArgumentList &TemplateArgs); 4218 4219 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 4220 4221 /// A flag to suppress access checking. 4222 bool SuppressAccessChecking; 4223 4224 /// \brief When true, access checking violations are treated as SFINAE 4225 /// failures rather than hard errors. 4226 bool AccessCheckingSFINAE; 4227 4228 /// \brief RAII object used to temporarily suppress access checking. 4229 class SuppressAccessChecksRAII { 4230 Sema &S; 4231 bool SuppressingAccess; 4232 4233 public: 4234 SuppressAccessChecksRAII(Sema &S, bool Suppress) 4235 : S(S), SuppressingAccess(Suppress) { 4236 if (Suppress) S.ActOnStartSuppressingAccessChecks(); 4237 } 4238 ~SuppressAccessChecksRAII() { 4239 done(); 4240 } 4241 void done() { 4242 if (!SuppressingAccess) return; 4243 S.ActOnStopSuppressingAccessChecks(); 4244 SuppressingAccess = false; 4245 } 4246 }; 4247 4248 void ActOnStartSuppressingAccessChecks(); 4249 void ActOnStopSuppressingAccessChecks(); 4250 4251 enum AbstractDiagSelID { 4252 AbstractNone = -1, 4253 AbstractReturnType, 4254 AbstractParamType, 4255 AbstractVariableType, 4256 AbstractFieldType, 4257 AbstractArrayType 4258 }; 4259 4260 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 4261 const PartialDiagnostic &PD); 4262 void DiagnoseAbstractType(const CXXRecordDecl *RD); 4263 4264 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 4265 AbstractDiagSelID SelID = AbstractNone); 4266 4267 //===--------------------------------------------------------------------===// 4268 // C++ Overloaded Operators [C++ 13.5] 4269 // 4270 4271 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 4272 4273 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 4274 4275 //===--------------------------------------------------------------------===// 4276 // C++ Templates [C++ 14] 4277 // 4278 void FilterAcceptableTemplateNames(LookupResult &R, 4279 bool AllowFunctionTemplates = true); 4280 bool hasAnyAcceptableTemplateNames(LookupResult &R, 4281 bool AllowFunctionTemplates = true); 4282 4283 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 4284 QualType ObjectType, bool EnteringContext, 4285 bool &MemberOfUnknownSpecialization); 4286 4287 TemplateNameKind isTemplateName(Scope *S, 4288 CXXScopeSpec &SS, 4289 bool hasTemplateKeyword, 4290 UnqualifiedId &Name, 4291 ParsedType ObjectType, 4292 bool EnteringContext, 4293 TemplateTy &Template, 4294 bool &MemberOfUnknownSpecialization); 4295 4296 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 4297 SourceLocation IILoc, 4298 Scope *S, 4299 const CXXScopeSpec *SS, 4300 TemplateTy &SuggestedTemplate, 4301 TemplateNameKind &SuggestedKind); 4302 4303 void DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 4304 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 4305 4306 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 4307 SourceLocation EllipsisLoc, 4308 SourceLocation KeyLoc, 4309 IdentifierInfo *ParamName, 4310 SourceLocation ParamNameLoc, 4311 unsigned Depth, unsigned Position, 4312 SourceLocation EqualLoc, 4313 ParsedType DefaultArg); 4314 4315 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 4316 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 4317 unsigned Depth, 4318 unsigned Position, 4319 SourceLocation EqualLoc, 4320 Expr *DefaultArg); 4321 Decl *ActOnTemplateTemplateParameter(Scope *S, 4322 SourceLocation TmpLoc, 4323 TemplateParameterList *Params, 4324 SourceLocation EllipsisLoc, 4325 IdentifierInfo *ParamName, 4326 SourceLocation ParamNameLoc, 4327 unsigned Depth, 4328 unsigned Position, 4329 SourceLocation EqualLoc, 4330 ParsedTemplateArgument DefaultArg); 4331 4332 TemplateParameterList * 4333 ActOnTemplateParameterList(unsigned Depth, 4334 SourceLocation ExportLoc, 4335 SourceLocation TemplateLoc, 4336 SourceLocation LAngleLoc, 4337 Decl **Params, unsigned NumParams, 4338 SourceLocation RAngleLoc); 4339 4340 /// \brief The context in which we are checking a template parameter 4341 /// list. 4342 enum TemplateParamListContext { 4343 TPC_ClassTemplate, 4344 TPC_FunctionTemplate, 4345 TPC_ClassTemplateMember, 4346 TPC_FriendFunctionTemplate, 4347 TPC_FriendFunctionTemplateDefinition, 4348 TPC_TypeAliasTemplate 4349 }; 4350 4351 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 4352 TemplateParameterList *OldParams, 4353 TemplateParamListContext TPC); 4354 TemplateParameterList * 4355 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 4356 SourceLocation DeclLoc, 4357 const CXXScopeSpec &SS, 4358 TemplateParameterList **ParamLists, 4359 unsigned NumParamLists, 4360 bool IsFriend, 4361 bool &IsExplicitSpecialization, 4362 bool &Invalid); 4363 4364 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 4365 SourceLocation KWLoc, CXXScopeSpec &SS, 4366 IdentifierInfo *Name, SourceLocation NameLoc, 4367 AttributeList *Attr, 4368 TemplateParameterList *TemplateParams, 4369 AccessSpecifier AS, 4370 SourceLocation ModulePrivateLoc, 4371 unsigned NumOuterTemplateParamLists, 4372 TemplateParameterList **OuterTemplateParamLists); 4373 4374 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 4375 TemplateArgumentListInfo &Out); 4376 4377 void NoteAllFoundTemplates(TemplateName Name); 4378 4379 QualType CheckTemplateIdType(TemplateName Template, 4380 SourceLocation TemplateLoc, 4381 TemplateArgumentListInfo &TemplateArgs); 4382 4383 TypeResult 4384 ActOnTemplateIdType(CXXScopeSpec &SS, SourceLocation TemplateKWLoc, 4385 TemplateTy Template, SourceLocation TemplateLoc, 4386 SourceLocation LAngleLoc, 4387 ASTTemplateArgsPtr TemplateArgs, 4388 SourceLocation RAngleLoc, 4389 bool IsCtorOrDtorName = false); 4390 4391 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 4392 /// such as \c class T::template apply<U>. 4393 /// 4394 /// \param TUK 4395 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 4396 TypeSpecifierType TagSpec, 4397 SourceLocation TagLoc, 4398 CXXScopeSpec &SS, 4399 SourceLocation TemplateKWLoc, 4400 TemplateTy TemplateD, 4401 SourceLocation TemplateLoc, 4402 SourceLocation LAngleLoc, 4403 ASTTemplateArgsPtr TemplateArgsIn, 4404 SourceLocation RAngleLoc); 4405 4406 4407 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 4408 SourceLocation TemplateKWLoc, 4409 LookupResult &R, 4410 bool RequiresADL, 4411 const TemplateArgumentListInfo *TemplateArgs); 4412 4413 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 4414 SourceLocation TemplateKWLoc, 4415 const DeclarationNameInfo &NameInfo, 4416 const TemplateArgumentListInfo *TemplateArgs); 4417 4418 TemplateNameKind ActOnDependentTemplateName(Scope *S, 4419 CXXScopeSpec &SS, 4420 SourceLocation TemplateKWLoc, 4421 UnqualifiedId &Name, 4422 ParsedType ObjectType, 4423 bool EnteringContext, 4424 TemplateTy &Template); 4425 4426 DeclResult 4427 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 4428 SourceLocation KWLoc, 4429 SourceLocation ModulePrivateLoc, 4430 CXXScopeSpec &SS, 4431 TemplateTy Template, 4432 SourceLocation TemplateNameLoc, 4433 SourceLocation LAngleLoc, 4434 ASTTemplateArgsPtr TemplateArgs, 4435 SourceLocation RAngleLoc, 4436 AttributeList *Attr, 4437 MultiTemplateParamsArg TemplateParameterLists); 4438 4439 Decl *ActOnTemplateDeclarator(Scope *S, 4440 MultiTemplateParamsArg TemplateParameterLists, 4441 Declarator &D); 4442 4443 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 4444 MultiTemplateParamsArg TemplateParameterLists, 4445 Declarator &D); 4446 4447 bool 4448 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 4449 TemplateSpecializationKind NewTSK, 4450 NamedDecl *PrevDecl, 4451 TemplateSpecializationKind PrevTSK, 4452 SourceLocation PrevPtOfInstantiation, 4453 bool &SuppressNew); 4454 4455 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 4456 const TemplateArgumentListInfo &ExplicitTemplateArgs, 4457 LookupResult &Previous); 4458 4459 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 4460 TemplateArgumentListInfo *ExplicitTemplateArgs, 4461 LookupResult &Previous); 4462 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 4463 4464 DeclResult 4465 ActOnExplicitInstantiation(Scope *S, 4466 SourceLocation ExternLoc, 4467 SourceLocation TemplateLoc, 4468 unsigned TagSpec, 4469 SourceLocation KWLoc, 4470 const CXXScopeSpec &SS, 4471 TemplateTy Template, 4472 SourceLocation TemplateNameLoc, 4473 SourceLocation LAngleLoc, 4474 ASTTemplateArgsPtr TemplateArgs, 4475 SourceLocation RAngleLoc, 4476 AttributeList *Attr); 4477 4478 DeclResult 4479 ActOnExplicitInstantiation(Scope *S, 4480 SourceLocation ExternLoc, 4481 SourceLocation TemplateLoc, 4482 unsigned TagSpec, 4483 SourceLocation KWLoc, 4484 CXXScopeSpec &SS, 4485 IdentifierInfo *Name, 4486 SourceLocation NameLoc, 4487 AttributeList *Attr); 4488 4489 DeclResult ActOnExplicitInstantiation(Scope *S, 4490 SourceLocation ExternLoc, 4491 SourceLocation TemplateLoc, 4492 Declarator &D); 4493 4494 TemplateArgumentLoc 4495 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 4496 SourceLocation TemplateLoc, 4497 SourceLocation RAngleLoc, 4498 Decl *Param, 4499 SmallVectorImpl<TemplateArgument> &Converted); 4500 4501 /// \brief Specifies the context in which a particular template 4502 /// argument is being checked. 4503 enum CheckTemplateArgumentKind { 4504 /// \brief The template argument was specified in the code or was 4505 /// instantiated with some deduced template arguments. 4506 CTAK_Specified, 4507 4508 /// \brief The template argument was deduced via template argument 4509 /// deduction. 4510 CTAK_Deduced, 4511 4512 /// \brief The template argument was deduced from an array bound 4513 /// via template argument deduction. 4514 CTAK_DeducedFromArrayBound 4515 }; 4516 4517 bool CheckTemplateArgument(NamedDecl *Param, 4518 const TemplateArgumentLoc &Arg, 4519 NamedDecl *Template, 4520 SourceLocation TemplateLoc, 4521 SourceLocation RAngleLoc, 4522 unsigned ArgumentPackIndex, 4523 SmallVectorImpl<TemplateArgument> &Converted, 4524 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4525 4526 /// \brief Check that the given template arguments can be be provided to 4527 /// the given template, converting the arguments along the way. 4528 /// 4529 /// \param Template The template to which the template arguments are being 4530 /// provided. 4531 /// 4532 /// \param TemplateLoc The location of the template name in the source. 4533 /// 4534 /// \param TemplateArgs The list of template arguments. If the template is 4535 /// a template template parameter, this function may extend the set of 4536 /// template arguments to also include substituted, defaulted template 4537 /// arguments. 4538 /// 4539 /// \param PartialTemplateArgs True if the list of template arguments is 4540 /// intentionally partial, e.g., because we're checking just the initial 4541 /// set of template arguments. 4542 /// 4543 /// \param Converted Will receive the converted, canonicalized template 4544 /// arguments. 4545 /// 4546 /// 4547 /// \param ExpansionIntoFixedList If non-NULL, will be set true to indicate 4548 /// when the template arguments contain a pack expansion that is being 4549 /// expanded into a fixed parameter list. 4550 /// 4551 /// \returns True if an error occurred, false otherwise. 4552 bool CheckTemplateArgumentList(TemplateDecl *Template, 4553 SourceLocation TemplateLoc, 4554 TemplateArgumentListInfo &TemplateArgs, 4555 bool PartialTemplateArgs, 4556 SmallVectorImpl<TemplateArgument> &Converted, 4557 bool *ExpansionIntoFixedList = 0); 4558 4559 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 4560 const TemplateArgumentLoc &Arg, 4561 SmallVectorImpl<TemplateArgument> &Converted); 4562 4563 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 4564 TypeSourceInfo *Arg); 4565 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 4566 QualType InstantiatedParamType, Expr *Arg, 4567 TemplateArgument &Converted, 4568 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4569 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 4570 const TemplateArgumentLoc &Arg); 4571 4572 ExprResult 4573 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 4574 QualType ParamType, 4575 SourceLocation Loc); 4576 ExprResult 4577 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 4578 SourceLocation Loc); 4579 4580 /// \brief Enumeration describing how template parameter lists are compared 4581 /// for equality. 4582 enum TemplateParameterListEqualKind { 4583 /// \brief We are matching the template parameter lists of two templates 4584 /// that might be redeclarations. 4585 /// 4586 /// \code 4587 /// template<typename T> struct X; 4588 /// template<typename T> struct X; 4589 /// \endcode 4590 TPL_TemplateMatch, 4591 4592 /// \brief We are matching the template parameter lists of two template 4593 /// template parameters as part of matching the template parameter lists 4594 /// of two templates that might be redeclarations. 4595 /// 4596 /// \code 4597 /// template<template<int I> class TT> struct X; 4598 /// template<template<int Value> class Other> struct X; 4599 /// \endcode 4600 TPL_TemplateTemplateParmMatch, 4601 4602 /// \brief We are matching the template parameter lists of a template 4603 /// template argument against the template parameter lists of a template 4604 /// template parameter. 4605 /// 4606 /// \code 4607 /// template<template<int Value> class Metafun> struct X; 4608 /// template<int Value> struct integer_c; 4609 /// X<integer_c> xic; 4610 /// \endcode 4611 TPL_TemplateTemplateArgumentMatch 4612 }; 4613 4614 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 4615 TemplateParameterList *Old, 4616 bool Complain, 4617 TemplateParameterListEqualKind Kind, 4618 SourceLocation TemplateArgLoc 4619 = SourceLocation()); 4620 4621 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 4622 4623 /// \brief Called when the parser has parsed a C++ typename 4624 /// specifier, e.g., "typename T::type". 4625 /// 4626 /// \param S The scope in which this typename type occurs. 4627 /// \param TypenameLoc the location of the 'typename' keyword 4628 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4629 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 4630 /// \param IdLoc the location of the identifier. 4631 TypeResult 4632 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4633 const CXXScopeSpec &SS, const IdentifierInfo &II, 4634 SourceLocation IdLoc); 4635 4636 /// \brief Called when the parser has parsed a C++ typename 4637 /// specifier that ends in a template-id, e.g., 4638 /// "typename MetaFun::template apply<T1, T2>". 4639 /// 4640 /// \param S The scope in which this typename type occurs. 4641 /// \param TypenameLoc the location of the 'typename' keyword 4642 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4643 /// \param TemplateLoc the location of the 'template' keyword, if any. 4644 /// \param TemplateName The template name. 4645 /// \param TemplateNameLoc The location of the template name. 4646 /// \param LAngleLoc The location of the opening angle bracket ('<'). 4647 /// \param TemplateArgs The template arguments. 4648 /// \param RAngleLoc The location of the closing angle bracket ('>'). 4649 TypeResult 4650 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4651 const CXXScopeSpec &SS, 4652 SourceLocation TemplateLoc, 4653 TemplateTy Template, 4654 SourceLocation TemplateNameLoc, 4655 SourceLocation LAngleLoc, 4656 ASTTemplateArgsPtr TemplateArgs, 4657 SourceLocation RAngleLoc); 4658 4659 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 4660 SourceLocation KeywordLoc, 4661 NestedNameSpecifierLoc QualifierLoc, 4662 const IdentifierInfo &II, 4663 SourceLocation IILoc); 4664 4665 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 4666 SourceLocation Loc, 4667 DeclarationName Name); 4668 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 4669 4670 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 4671 bool RebuildTemplateParamsInCurrentInstantiation( 4672 TemplateParameterList *Params); 4673 4674 std::string 4675 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4676 const TemplateArgumentList &Args); 4677 4678 std::string 4679 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4680 const TemplateArgument *Args, 4681 unsigned NumArgs); 4682 4683 //===--------------------------------------------------------------------===// 4684 // C++ Variadic Templates (C++0x [temp.variadic]) 4685 //===--------------------------------------------------------------------===// 4686 4687 /// \brief The context in which an unexpanded parameter pack is 4688 /// being diagnosed. 4689 /// 4690 /// Note that the values of this enumeration line up with the first 4691 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4692 enum UnexpandedParameterPackContext { 4693 /// \brief An arbitrary expression. 4694 UPPC_Expression = 0, 4695 4696 /// \brief The base type of a class type. 4697 UPPC_BaseType, 4698 4699 /// \brief The type of an arbitrary declaration. 4700 UPPC_DeclarationType, 4701 4702 /// \brief The type of a data member. 4703 UPPC_DataMemberType, 4704 4705 /// \brief The size of a bit-field. 4706 UPPC_BitFieldWidth, 4707 4708 /// \brief The expression in a static assertion. 4709 UPPC_StaticAssertExpression, 4710 4711 /// \brief The fixed underlying type of an enumeration. 4712 UPPC_FixedUnderlyingType, 4713 4714 /// \brief The enumerator value. 4715 UPPC_EnumeratorValue, 4716 4717 /// \brief A using declaration. 4718 UPPC_UsingDeclaration, 4719 4720 /// \brief A friend declaration. 4721 UPPC_FriendDeclaration, 4722 4723 /// \brief A declaration qualifier. 4724 UPPC_DeclarationQualifier, 4725 4726 /// \brief An initializer. 4727 UPPC_Initializer, 4728 4729 /// \brief A default argument. 4730 UPPC_DefaultArgument, 4731 4732 /// \brief The type of a non-type template parameter. 4733 UPPC_NonTypeTemplateParameterType, 4734 4735 /// \brief The type of an exception. 4736 UPPC_ExceptionType, 4737 4738 /// \brief Partial specialization. 4739 UPPC_PartialSpecialization, 4740 4741 /// \brief Microsoft __if_exists. 4742 UPPC_IfExists, 4743 4744 /// \brief Microsoft __if_not_exists. 4745 UPPC_IfNotExists 4746}; 4747 4748 /// \brief Diagnose unexpanded parameter packs. 4749 /// 4750 /// \param Loc The location at which we should emit the diagnostic. 4751 /// 4752 /// \param UPPC The context in which we are diagnosing unexpanded 4753 /// parameter packs. 4754 /// 4755 /// \param Unexpanded the set of unexpanded parameter packs. 4756 void DiagnoseUnexpandedParameterPacks(SourceLocation Loc, 4757 UnexpandedParameterPackContext UPPC, 4758 ArrayRef<UnexpandedParameterPack> Unexpanded); 4759 4760 /// \brief If the given type contains an unexpanded parameter pack, 4761 /// diagnose the error. 4762 /// 4763 /// \param Loc The source location where a diagnostc should be emitted. 4764 /// 4765 /// \param T The type that is being checked for unexpanded parameter 4766 /// packs. 4767 /// 4768 /// \returns true if an error occurred, false otherwise. 4769 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4770 UnexpandedParameterPackContext UPPC); 4771 4772 /// \brief If the given expression contains an unexpanded parameter 4773 /// pack, diagnose the error. 4774 /// 4775 /// \param E The expression that is being checked for unexpanded 4776 /// parameter packs. 4777 /// 4778 /// \returns true if an error occurred, false otherwise. 4779 bool DiagnoseUnexpandedParameterPack(Expr *E, 4780 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4781 4782 /// \brief If the given nested-name-specifier contains an unexpanded 4783 /// parameter pack, diagnose the error. 4784 /// 4785 /// \param SS The nested-name-specifier that is being checked for 4786 /// unexpanded parameter packs. 4787 /// 4788 /// \returns true if an error occurred, false otherwise. 4789 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4790 UnexpandedParameterPackContext UPPC); 4791 4792 /// \brief If the given name contains an unexpanded parameter pack, 4793 /// diagnose the error. 4794 /// 4795 /// \param NameInfo The name (with source location information) that 4796 /// is being checked for unexpanded parameter packs. 4797 /// 4798 /// \returns true if an error occurred, false otherwise. 4799 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4800 UnexpandedParameterPackContext UPPC); 4801 4802 /// \brief If the given template name contains an unexpanded parameter pack, 4803 /// diagnose the error. 4804 /// 4805 /// \param Loc The location of the template name. 4806 /// 4807 /// \param Template The template name that is being checked for unexpanded 4808 /// parameter packs. 4809 /// 4810 /// \returns true if an error occurred, false otherwise. 4811 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4812 TemplateName Template, 4813 UnexpandedParameterPackContext UPPC); 4814 4815 /// \brief If the given template argument contains an unexpanded parameter 4816 /// pack, diagnose the error. 4817 /// 4818 /// \param Arg The template argument that is being checked for unexpanded 4819 /// parameter packs. 4820 /// 4821 /// \returns true if an error occurred, false otherwise. 4822 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4823 UnexpandedParameterPackContext UPPC); 4824 4825 /// \brief Collect the set of unexpanded parameter packs within the given 4826 /// template argument. 4827 /// 4828 /// \param Arg The template argument that will be traversed to find 4829 /// unexpanded parameter packs. 4830 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4831 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4832 4833 /// \brief Collect the set of unexpanded parameter packs within the given 4834 /// template argument. 4835 /// 4836 /// \param Arg The template argument that will be traversed to find 4837 /// unexpanded parameter packs. 4838 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4839 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4840 4841 /// \brief Collect the set of unexpanded parameter packs within the given 4842 /// type. 4843 /// 4844 /// \param T The type that will be traversed to find 4845 /// unexpanded parameter packs. 4846 void collectUnexpandedParameterPacks(QualType T, 4847 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4848 4849 /// \brief Collect the set of unexpanded parameter packs within the given 4850 /// type. 4851 /// 4852 /// \param TL The type that will be traversed to find 4853 /// unexpanded parameter packs. 4854 void collectUnexpandedParameterPacks(TypeLoc TL, 4855 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4856 4857 /// \brief Collect the set of unexpanded parameter packs within the given 4858 /// nested-name-specifier. 4859 /// 4860 /// \param SS The nested-name-specifier that will be traversed to find 4861 /// unexpanded parameter packs. 4862 void collectUnexpandedParameterPacks(CXXScopeSpec &SS, 4863 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4864 4865 /// \brief Collect the set of unexpanded parameter packs within the given 4866 /// name. 4867 /// 4868 /// \param NameInfo The name that will be traversed to find 4869 /// unexpanded parameter packs. 4870 void collectUnexpandedParameterPacks(const DeclarationNameInfo &NameInfo, 4871 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4872 4873 /// \brief Invoked when parsing a template argument followed by an 4874 /// ellipsis, which creates a pack expansion. 4875 /// 4876 /// \param Arg The template argument preceding the ellipsis, which 4877 /// may already be invalid. 4878 /// 4879 /// \param EllipsisLoc The location of the ellipsis. 4880 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4881 SourceLocation EllipsisLoc); 4882 4883 /// \brief Invoked when parsing a type followed by an ellipsis, which 4884 /// creates a pack expansion. 4885 /// 4886 /// \param Type The type preceding the ellipsis, which will become 4887 /// the pattern of the pack expansion. 4888 /// 4889 /// \param EllipsisLoc The location of the ellipsis. 4890 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4891 4892 /// \brief Construct a pack expansion type from the pattern of the pack 4893 /// expansion. 4894 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4895 SourceLocation EllipsisLoc, 4896 llvm::Optional<unsigned> NumExpansions); 4897 4898 /// \brief Construct a pack expansion type from the pattern of the pack 4899 /// expansion. 4900 QualType CheckPackExpansion(QualType Pattern, 4901 SourceRange PatternRange, 4902 SourceLocation EllipsisLoc, 4903 llvm::Optional<unsigned> NumExpansions); 4904 4905 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4906 /// creates a pack expansion. 4907 /// 4908 /// \param Pattern The expression preceding the ellipsis, which will become 4909 /// the pattern of the pack expansion. 4910 /// 4911 /// \param EllipsisLoc The location of the ellipsis. 4912 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4913 4914 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4915 /// creates a pack expansion. 4916 /// 4917 /// \param Pattern The expression preceding the ellipsis, which will become 4918 /// the pattern of the pack expansion. 4919 /// 4920 /// \param EllipsisLoc The location of the ellipsis. 4921 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4922 llvm::Optional<unsigned> NumExpansions); 4923 4924 /// \brief Determine whether we could expand a pack expansion with the 4925 /// given set of parameter packs into separate arguments by repeatedly 4926 /// transforming the pattern. 4927 /// 4928 /// \param EllipsisLoc The location of the ellipsis that identifies the 4929 /// pack expansion. 4930 /// 4931 /// \param PatternRange The source range that covers the entire pattern of 4932 /// the pack expansion. 4933 /// 4934 /// \param Unexpanded The set of unexpanded parameter packs within the 4935 /// pattern. 4936 /// 4937 /// \param NumUnexpanded The number of unexpanded parameter packs in 4938 /// \p Unexpanded. 4939 /// 4940 /// \param ShouldExpand Will be set to \c true if the transformer should 4941 /// expand the corresponding pack expansions into separate arguments. When 4942 /// set, \c NumExpansions must also be set. 4943 /// 4944 /// \param RetainExpansion Whether the caller should add an unexpanded 4945 /// pack expansion after all of the expanded arguments. This is used 4946 /// when extending explicitly-specified template argument packs per 4947 /// C++0x [temp.arg.explicit]p9. 4948 /// 4949 /// \param NumExpansions The number of separate arguments that will be in 4950 /// the expanded form of the corresponding pack expansion. This is both an 4951 /// input and an output parameter, which can be set by the caller if the 4952 /// number of expansions is known a priori (e.g., due to a prior substitution) 4953 /// and will be set by the callee when the number of expansions is known. 4954 /// The callee must set this value when \c ShouldExpand is \c true; it may 4955 /// set this value in other cases. 4956 /// 4957 /// \returns true if an error occurred (e.g., because the parameter packs 4958 /// are to be instantiated with arguments of different lengths), false 4959 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4960 /// must be set. 4961 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4962 SourceRange PatternRange, 4963 llvm::ArrayRef<UnexpandedParameterPack> Unexpanded, 4964 const MultiLevelTemplateArgumentList &TemplateArgs, 4965 bool &ShouldExpand, 4966 bool &RetainExpansion, 4967 llvm::Optional<unsigned> &NumExpansions); 4968 4969 /// \brief Determine the number of arguments in the given pack expansion 4970 /// type. 4971 /// 4972 /// This routine already assumes that the pack expansion type can be 4973 /// expanded and that the number of arguments in the expansion is 4974 /// consistent across all of the unexpanded parameter packs in its pattern. 4975 unsigned getNumArgumentsInExpansion(QualType T, 4976 const MultiLevelTemplateArgumentList &TemplateArgs); 4977 4978 /// \brief Determine whether the given declarator contains any unexpanded 4979 /// parameter packs. 4980 /// 4981 /// This routine is used by the parser to disambiguate function declarators 4982 /// with an ellipsis prior to the ')', e.g., 4983 /// 4984 /// \code 4985 /// void f(T...); 4986 /// \endcode 4987 /// 4988 /// To determine whether we have an (unnamed) function parameter pack or 4989 /// a variadic function. 4990 /// 4991 /// \returns true if the declarator contains any unexpanded parameter packs, 4992 /// false otherwise. 4993 bool containsUnexpandedParameterPacks(Declarator &D); 4994 4995 //===--------------------------------------------------------------------===// 4996 // C++ Template Argument Deduction (C++ [temp.deduct]) 4997 //===--------------------------------------------------------------------===// 4998 4999 /// \brief Describes the result of template argument deduction. 5000 /// 5001 /// The TemplateDeductionResult enumeration describes the result of 5002 /// template argument deduction, as returned from 5003 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 5004 /// structure provides additional information about the results of 5005 /// template argument deduction, e.g., the deduced template argument 5006 /// list (if successful) or the specific template parameters or 5007 /// deduced arguments that were involved in the failure. 5008 enum TemplateDeductionResult { 5009 /// \brief Template argument deduction was successful. 5010 TDK_Success = 0, 5011 /// \brief Template argument deduction exceeded the maximum template 5012 /// instantiation depth (which has already been diagnosed). 5013 TDK_InstantiationDepth, 5014 /// \brief Template argument deduction did not deduce a value 5015 /// for every template parameter. 5016 TDK_Incomplete, 5017 /// \brief Template argument deduction produced inconsistent 5018 /// deduced values for the given template parameter. 5019 TDK_Inconsistent, 5020 /// \brief Template argument deduction failed due to inconsistent 5021 /// cv-qualifiers on a template parameter type that would 5022 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 5023 /// but were given a non-const "X". 5024 TDK_Underqualified, 5025 /// \brief Substitution of the deduced template argument values 5026 /// resulted in an error. 5027 TDK_SubstitutionFailure, 5028 /// \brief Substitution of the deduced template argument values 5029 /// into a non-deduced context produced a type or value that 5030 /// produces a type that does not match the original template 5031 /// arguments provided. 5032 TDK_NonDeducedMismatch, 5033 /// \brief When performing template argument deduction for a function 5034 /// template, there were too many call arguments. 5035 TDK_TooManyArguments, 5036 /// \brief When performing template argument deduction for a function 5037 /// template, there were too few call arguments. 5038 TDK_TooFewArguments, 5039 /// \brief The explicitly-specified template arguments were not valid 5040 /// template arguments for the given template. 5041 TDK_InvalidExplicitArguments, 5042 /// \brief The arguments included an overloaded function name that could 5043 /// not be resolved to a suitable function. 5044 TDK_FailedOverloadResolution 5045 }; 5046 5047 TemplateDeductionResult 5048 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 5049 const TemplateArgumentList &TemplateArgs, 5050 sema::TemplateDeductionInfo &Info); 5051 5052 TemplateDeductionResult 5053 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 5054 TemplateArgumentListInfo &ExplicitTemplateArgs, 5055 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 5056 SmallVectorImpl<QualType> &ParamTypes, 5057 QualType *FunctionType, 5058 sema::TemplateDeductionInfo &Info); 5059 5060 /// brief A function argument from which we performed template argument 5061 // deduction for a call. 5062 struct OriginalCallArg { 5063 OriginalCallArg(QualType OriginalParamType, 5064 unsigned ArgIdx, 5065 QualType OriginalArgType) 5066 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 5067 OriginalArgType(OriginalArgType) { } 5068 5069 QualType OriginalParamType; 5070 unsigned ArgIdx; 5071 QualType OriginalArgType; 5072 }; 5073 5074 TemplateDeductionResult 5075 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 5076 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 5077 unsigned NumExplicitlySpecified, 5078 FunctionDecl *&Specialization, 5079 sema::TemplateDeductionInfo &Info, 5080 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 5081 5082 TemplateDeductionResult 5083 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 5084 TemplateArgumentListInfo *ExplicitTemplateArgs, 5085 llvm::ArrayRef<Expr *> Args, 5086 FunctionDecl *&Specialization, 5087 sema::TemplateDeductionInfo &Info); 5088 5089 TemplateDeductionResult 5090 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 5091 TemplateArgumentListInfo *ExplicitTemplateArgs, 5092 QualType ArgFunctionType, 5093 FunctionDecl *&Specialization, 5094 sema::TemplateDeductionInfo &Info); 5095 5096 TemplateDeductionResult 5097 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 5098 QualType ToType, 5099 CXXConversionDecl *&Specialization, 5100 sema::TemplateDeductionInfo &Info); 5101 5102 TemplateDeductionResult 5103 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 5104 TemplateArgumentListInfo *ExplicitTemplateArgs, 5105 FunctionDecl *&Specialization, 5106 sema::TemplateDeductionInfo &Info); 5107 5108 /// \brief Result type of DeduceAutoType. 5109 enum DeduceAutoResult { 5110 DAR_Succeeded, 5111 DAR_Failed, 5112 DAR_FailedAlreadyDiagnosed 5113 }; 5114 5115 DeduceAutoResult DeduceAutoType(TypeSourceInfo *AutoType, Expr *&Initializer, 5116 TypeSourceInfo *&Result); 5117 void DiagnoseAutoDeductionFailure(VarDecl *VDecl, Expr *Init); 5118 5119 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 5120 FunctionTemplateDecl *FT2, 5121 SourceLocation Loc, 5122 TemplatePartialOrderingContext TPOC, 5123 unsigned NumCallArguments); 5124 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 5125 UnresolvedSetIterator SEnd, 5126 TemplatePartialOrderingContext TPOC, 5127 unsigned NumCallArguments, 5128 SourceLocation Loc, 5129 const PartialDiagnostic &NoneDiag, 5130 const PartialDiagnostic &AmbigDiag, 5131 const PartialDiagnostic &CandidateDiag, 5132 bool Complain = true, 5133 QualType TargetType = QualType()); 5134 5135 ClassTemplatePartialSpecializationDecl * 5136 getMoreSpecializedPartialSpecialization( 5137 ClassTemplatePartialSpecializationDecl *PS1, 5138 ClassTemplatePartialSpecializationDecl *PS2, 5139 SourceLocation Loc); 5140 5141 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 5142 bool OnlyDeduced, 5143 unsigned Depth, 5144 llvm::SmallBitVector &Used); 5145 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 5146 llvm::SmallBitVector &Deduced) { 5147 return MarkDeducedTemplateParameters(Context, FunctionTemplate, Deduced); 5148 } 5149 static void MarkDeducedTemplateParameters(ASTContext &Ctx, 5150 FunctionTemplateDecl *FunctionTemplate, 5151 llvm::SmallBitVector &Deduced); 5152 5153 //===--------------------------------------------------------------------===// 5154 // C++ Template Instantiation 5155 // 5156 5157 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 5158 const TemplateArgumentList *Innermost = 0, 5159 bool RelativeToPrimary = false, 5160 const FunctionDecl *Pattern = 0); 5161 5162 /// \brief A template instantiation that is currently in progress. 5163 struct ActiveTemplateInstantiation { 5164 /// \brief The kind of template instantiation we are performing 5165 enum InstantiationKind { 5166 /// We are instantiating a template declaration. The entity is 5167 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 5168 TemplateInstantiation, 5169 5170 /// We are instantiating a default argument for a template 5171 /// parameter. The Entity is the template, and 5172 /// TemplateArgs/NumTemplateArguments provides the template 5173 /// arguments as specified. 5174 /// FIXME: Use a TemplateArgumentList 5175 DefaultTemplateArgumentInstantiation, 5176 5177 /// We are instantiating a default argument for a function. 5178 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 5179 /// provides the template arguments as specified. 5180 DefaultFunctionArgumentInstantiation, 5181 5182 /// We are substituting explicit template arguments provided for 5183 /// a function template. The entity is a FunctionTemplateDecl. 5184 ExplicitTemplateArgumentSubstitution, 5185 5186 /// We are substituting template argument determined as part of 5187 /// template argument deduction for either a class template 5188 /// partial specialization or a function template. The 5189 /// Entity is either a ClassTemplatePartialSpecializationDecl or 5190 /// a FunctionTemplateDecl. 5191 DeducedTemplateArgumentSubstitution, 5192 5193 /// We are substituting prior template arguments into a new 5194 /// template parameter. The template parameter itself is either a 5195 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 5196 PriorTemplateArgumentSubstitution, 5197 5198 /// We are checking the validity of a default template argument that 5199 /// has been used when naming a template-id. 5200 DefaultTemplateArgumentChecking, 5201 5202 /// We are instantiating the exception specification for a function 5203 /// template which was deferred until it was needed. 5204 ExceptionSpecInstantiation 5205 } Kind; 5206 5207 /// \brief The point of instantiation within the source code. 5208 SourceLocation PointOfInstantiation; 5209 5210 /// \brief The template (or partial specialization) in which we are 5211 /// performing the instantiation, for substitutions of prior template 5212 /// arguments. 5213 NamedDecl *Template; 5214 5215 /// \brief The entity that is being instantiated. 5216 uintptr_t Entity; 5217 5218 /// \brief The list of template arguments we are substituting, if they 5219 /// are not part of the entity. 5220 const TemplateArgument *TemplateArgs; 5221 5222 /// \brief The number of template arguments in TemplateArgs. 5223 unsigned NumTemplateArgs; 5224 5225 /// \brief The template deduction info object associated with the 5226 /// substitution or checking of explicit or deduced template arguments. 5227 sema::TemplateDeductionInfo *DeductionInfo; 5228 5229 /// \brief The source range that covers the construct that cause 5230 /// the instantiation, e.g., the template-id that causes a class 5231 /// template instantiation. 5232 SourceRange InstantiationRange; 5233 5234 ActiveTemplateInstantiation() 5235 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 5236 NumTemplateArgs(0), DeductionInfo(0) {} 5237 5238 /// \brief Determines whether this template is an actual instantiation 5239 /// that should be counted toward the maximum instantiation depth. 5240 bool isInstantiationRecord() const; 5241 5242 friend bool operator==(const ActiveTemplateInstantiation &X, 5243 const ActiveTemplateInstantiation &Y) { 5244 if (X.Kind != Y.Kind) 5245 return false; 5246 5247 if (X.Entity != Y.Entity) 5248 return false; 5249 5250 switch (X.Kind) { 5251 case TemplateInstantiation: 5252 case ExceptionSpecInstantiation: 5253 return true; 5254 5255 case PriorTemplateArgumentSubstitution: 5256 case DefaultTemplateArgumentChecking: 5257 if (X.Template != Y.Template) 5258 return false; 5259 5260 // Fall through 5261 5262 case DefaultTemplateArgumentInstantiation: 5263 case ExplicitTemplateArgumentSubstitution: 5264 case DeducedTemplateArgumentSubstitution: 5265 case DefaultFunctionArgumentInstantiation: 5266 return X.TemplateArgs == Y.TemplateArgs; 5267 5268 } 5269 5270 llvm_unreachable("Invalid InstantiationKind!"); 5271 } 5272 5273 friend bool operator!=(const ActiveTemplateInstantiation &X, 5274 const ActiveTemplateInstantiation &Y) { 5275 return !(X == Y); 5276 } 5277 }; 5278 5279 /// \brief List of active template instantiations. 5280 /// 5281 /// This vector is treated as a stack. As one template instantiation 5282 /// requires another template instantiation, additional 5283 /// instantiations are pushed onto the stack up to a 5284 /// user-configurable limit LangOptions::InstantiationDepth. 5285 SmallVector<ActiveTemplateInstantiation, 16> 5286 ActiveTemplateInstantiations; 5287 5288 /// \brief Whether we are in a SFINAE context that is not associated with 5289 /// template instantiation. 5290 /// 5291 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 5292 /// of a template instantiation or template argument deduction. 5293 bool InNonInstantiationSFINAEContext; 5294 5295 /// \brief The number of ActiveTemplateInstantiation entries in 5296 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 5297 /// therefore, should not be counted as part of the instantiation depth. 5298 unsigned NonInstantiationEntries; 5299 5300 /// \brief The last template from which a template instantiation 5301 /// error or warning was produced. 5302 /// 5303 /// This value is used to suppress printing of redundant template 5304 /// instantiation backtraces when there are multiple errors in the 5305 /// same instantiation. FIXME: Does this belong in Sema? It's tough 5306 /// to implement it anywhere else. 5307 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 5308 5309 /// \brief The current index into pack expansion arguments that will be 5310 /// used for substitution of parameter packs. 5311 /// 5312 /// The pack expansion index will be -1 to indicate that parameter packs 5313 /// should be instantiated as themselves. Otherwise, the index specifies 5314 /// which argument within the parameter pack will be used for substitution. 5315 int ArgumentPackSubstitutionIndex; 5316 5317 /// \brief RAII object used to change the argument pack substitution index 5318 /// within a \c Sema object. 5319 /// 5320 /// See \c ArgumentPackSubstitutionIndex for more information. 5321 class ArgumentPackSubstitutionIndexRAII { 5322 Sema &Self; 5323 int OldSubstitutionIndex; 5324 5325 public: 5326 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 5327 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 5328 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 5329 } 5330 5331 ~ArgumentPackSubstitutionIndexRAII() { 5332 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 5333 } 5334 }; 5335 5336 friend class ArgumentPackSubstitutionRAII; 5337 5338 /// \brief The stack of calls expression undergoing template instantiation. 5339 /// 5340 /// The top of this stack is used by a fixit instantiating unresolved 5341 /// function calls to fix the AST to match the textual change it prints. 5342 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 5343 5344 /// \brief For each declaration that involved template argument deduction, the 5345 /// set of diagnostics that were suppressed during that template argument 5346 /// deduction. 5347 /// 5348 /// FIXME: Serialize this structure to the AST file. 5349 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 5350 SuppressedDiagnostics; 5351 5352 /// \brief A stack object to be created when performing template 5353 /// instantiation. 5354 /// 5355 /// Construction of an object of type \c InstantiatingTemplate 5356 /// pushes the current instantiation onto the stack of active 5357 /// instantiations. If the size of this stack exceeds the maximum 5358 /// number of recursive template instantiations, construction 5359 /// produces an error and evaluates true. 5360 /// 5361 /// Destruction of this object will pop the named instantiation off 5362 /// the stack. 5363 struct InstantiatingTemplate { 5364 /// \brief Note that we are instantiating a class template, 5365 /// function template, or a member thereof. 5366 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5367 Decl *Entity, 5368 SourceRange InstantiationRange = SourceRange()); 5369 5370 struct ExceptionSpecification {}; 5371 /// \brief Note that we are instantiating an exception specification 5372 /// of a function template. 5373 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5374 FunctionDecl *Entity, ExceptionSpecification, 5375 SourceRange InstantiationRange = SourceRange()); 5376 5377 /// \brief Note that we are instantiating a default argument in a 5378 /// template-id. 5379 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5380 TemplateDecl *Template, 5381 const TemplateArgument *TemplateArgs, 5382 unsigned NumTemplateArgs, 5383 SourceRange InstantiationRange = SourceRange()); 5384 5385 /// \brief Note that we are instantiating a default argument in a 5386 /// template-id. 5387 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5388 FunctionTemplateDecl *FunctionTemplate, 5389 const TemplateArgument *TemplateArgs, 5390 unsigned NumTemplateArgs, 5391 ActiveTemplateInstantiation::InstantiationKind Kind, 5392 sema::TemplateDeductionInfo &DeductionInfo, 5393 SourceRange InstantiationRange = SourceRange()); 5394 5395 /// \brief Note that we are instantiating as part of template 5396 /// argument deduction for a class template partial 5397 /// specialization. 5398 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5399 ClassTemplatePartialSpecializationDecl *PartialSpec, 5400 const TemplateArgument *TemplateArgs, 5401 unsigned NumTemplateArgs, 5402 sema::TemplateDeductionInfo &DeductionInfo, 5403 SourceRange InstantiationRange = SourceRange()); 5404 5405 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5406 ParmVarDecl *Param, 5407 const TemplateArgument *TemplateArgs, 5408 unsigned NumTemplateArgs, 5409 SourceRange InstantiationRange = SourceRange()); 5410 5411 /// \brief Note that we are substituting prior template arguments into a 5412 /// non-type or template template parameter. 5413 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5414 NamedDecl *Template, 5415 NonTypeTemplateParmDecl *Param, 5416 const TemplateArgument *TemplateArgs, 5417 unsigned NumTemplateArgs, 5418 SourceRange InstantiationRange); 5419 5420 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5421 NamedDecl *Template, 5422 TemplateTemplateParmDecl *Param, 5423 const TemplateArgument *TemplateArgs, 5424 unsigned NumTemplateArgs, 5425 SourceRange InstantiationRange); 5426 5427 /// \brief Note that we are checking the default template argument 5428 /// against the template parameter for a given template-id. 5429 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5430 TemplateDecl *Template, 5431 NamedDecl *Param, 5432 const TemplateArgument *TemplateArgs, 5433 unsigned NumTemplateArgs, 5434 SourceRange InstantiationRange); 5435 5436 5437 /// \brief Note that we have finished instantiating this template. 5438 void Clear(); 5439 5440 ~InstantiatingTemplate() { Clear(); } 5441 5442 /// \brief Determines whether we have exceeded the maximum 5443 /// recursive template instantiations. 5444 operator bool() const { return Invalid; } 5445 5446 private: 5447 Sema &SemaRef; 5448 bool Invalid; 5449 bool SavedInNonInstantiationSFINAEContext; 5450 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 5451 SourceRange InstantiationRange); 5452 5453 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 5454 5455 InstantiatingTemplate& 5456 operator=(const InstantiatingTemplate&); // not implemented 5457 }; 5458 5459 void PrintInstantiationStack(); 5460 5461 /// \brief Determines whether we are currently in a context where 5462 /// template argument substitution failures are not considered 5463 /// errors. 5464 /// 5465 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 5466 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 5467 /// template-deduction context object, which can be used to capture 5468 /// diagnostics that will be suppressed. 5469 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 5470 5471 /// \brief RAII class used to determine whether SFINAE has 5472 /// trapped any errors that occur during template argument 5473 /// deduction.` 5474 class SFINAETrap { 5475 Sema &SemaRef; 5476 unsigned PrevSFINAEErrors; 5477 bool PrevInNonInstantiationSFINAEContext; 5478 bool PrevAccessCheckingSFINAE; 5479 5480 public: 5481 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 5482 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 5483 PrevInNonInstantiationSFINAEContext( 5484 SemaRef.InNonInstantiationSFINAEContext), 5485 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 5486 { 5487 if (!SemaRef.isSFINAEContext()) 5488 SemaRef.InNonInstantiationSFINAEContext = true; 5489 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 5490 } 5491 5492 ~SFINAETrap() { 5493 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 5494 SemaRef.InNonInstantiationSFINAEContext 5495 = PrevInNonInstantiationSFINAEContext; 5496 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 5497 } 5498 5499 /// \brief Determine whether any SFINAE errors have been trapped. 5500 bool hasErrorOccurred() const { 5501 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 5502 } 5503 }; 5504 5505 /// \brief The current instantiation scope used to store local 5506 /// variables. 5507 LocalInstantiationScope *CurrentInstantiationScope; 5508 5509 /// \brief The number of typos corrected by CorrectTypo. 5510 unsigned TyposCorrected; 5511 5512 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 5513 UnqualifiedTyposCorrectedMap; 5514 5515 /// \brief A cache containing the results of typo correction for unqualified 5516 /// name lookup. 5517 /// 5518 /// The string is the string that we corrected to (which may be empty, if 5519 /// there was no correction), while the boolean will be true when the 5520 /// string represents a keyword. 5521 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 5522 5523 /// \brief Worker object for performing CFG-based warnings. 5524 sema::AnalysisBasedWarnings AnalysisWarnings; 5525 5526 /// \brief An entity for which implicit template instantiation is required. 5527 /// 5528 /// The source location associated with the declaration is the first place in 5529 /// the source code where the declaration was "used". It is not necessarily 5530 /// the point of instantiation (which will be either before or after the 5531 /// namespace-scope declaration that triggered this implicit instantiation), 5532 /// However, it is the location that diagnostics should generally refer to, 5533 /// because users will need to know what code triggered the instantiation. 5534 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 5535 5536 /// \brief The queue of implicit template instantiations that are required 5537 /// but have not yet been performed. 5538 std::deque<PendingImplicitInstantiation> PendingInstantiations; 5539 5540 /// \brief The queue of implicit template instantiations that are required 5541 /// and must be performed within the current local scope. 5542 /// 5543 /// This queue is only used for member functions of local classes in 5544 /// templates, which must be instantiated in the same scope as their 5545 /// enclosing function, so that they can reference function-local 5546 /// types, static variables, enumerators, etc. 5547 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 5548 5549 void PerformPendingInstantiations(bool LocalOnly = false); 5550 5551 TypeSourceInfo *SubstType(TypeSourceInfo *T, 5552 const MultiLevelTemplateArgumentList &TemplateArgs, 5553 SourceLocation Loc, DeclarationName Entity); 5554 5555 QualType SubstType(QualType T, 5556 const MultiLevelTemplateArgumentList &TemplateArgs, 5557 SourceLocation Loc, DeclarationName Entity); 5558 5559 TypeSourceInfo *SubstType(TypeLoc TL, 5560 const MultiLevelTemplateArgumentList &TemplateArgs, 5561 SourceLocation Loc, DeclarationName Entity); 5562 5563 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 5564 const MultiLevelTemplateArgumentList &TemplateArgs, 5565 SourceLocation Loc, 5566 DeclarationName Entity, 5567 CXXRecordDecl *ThisContext, 5568 unsigned ThisTypeQuals); 5569 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 5570 const MultiLevelTemplateArgumentList &TemplateArgs, 5571 int indexAdjustment, 5572 llvm::Optional<unsigned> NumExpansions, 5573 bool ExpectParameterPack); 5574 bool SubstParmTypes(SourceLocation Loc, 5575 ParmVarDecl **Params, unsigned NumParams, 5576 const MultiLevelTemplateArgumentList &TemplateArgs, 5577 SmallVectorImpl<QualType> &ParamTypes, 5578 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 5579 ExprResult SubstExpr(Expr *E, 5580 const MultiLevelTemplateArgumentList &TemplateArgs); 5581 5582 /// \brief Substitute the given template arguments into a list of 5583 /// expressions, expanding pack expansions if required. 5584 /// 5585 /// \param Exprs The list of expressions to substitute into. 5586 /// 5587 /// \param NumExprs The number of expressions in \p Exprs. 5588 /// 5589 /// \param IsCall Whether this is some form of call, in which case 5590 /// default arguments will be dropped. 5591 /// 5592 /// \param TemplateArgs The set of template arguments to substitute. 5593 /// 5594 /// \param Outputs Will receive all of the substituted arguments. 5595 /// 5596 /// \returns true if an error occurred, false otherwise. 5597 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 5598 const MultiLevelTemplateArgumentList &TemplateArgs, 5599 SmallVectorImpl<Expr *> &Outputs); 5600 5601 StmtResult SubstStmt(Stmt *S, 5602 const MultiLevelTemplateArgumentList &TemplateArgs); 5603 5604 Decl *SubstDecl(Decl *D, DeclContext *Owner, 5605 const MultiLevelTemplateArgumentList &TemplateArgs); 5606 5607 ExprResult SubstInitializer(Expr *E, 5608 const MultiLevelTemplateArgumentList &TemplateArgs, 5609 bool CXXDirectInit); 5610 5611 bool 5612 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 5613 CXXRecordDecl *Pattern, 5614 const MultiLevelTemplateArgumentList &TemplateArgs); 5615 5616 bool 5617 InstantiateClass(SourceLocation PointOfInstantiation, 5618 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 5619 const MultiLevelTemplateArgumentList &TemplateArgs, 5620 TemplateSpecializationKind TSK, 5621 bool Complain = true); 5622 5623 bool InstantiateEnum(SourceLocation PointOfInstantiation, 5624 EnumDecl *Instantiation, EnumDecl *Pattern, 5625 const MultiLevelTemplateArgumentList &TemplateArgs, 5626 TemplateSpecializationKind TSK); 5627 5628 struct LateInstantiatedAttribute { 5629 const Attr *TmplAttr; 5630 LocalInstantiationScope *Scope; 5631 Decl *NewDecl; 5632 5633 LateInstantiatedAttribute(const Attr *A, LocalInstantiationScope *S, 5634 Decl *D) 5635 : TmplAttr(A), Scope(S), NewDecl(D) 5636 { } 5637 }; 5638 typedef SmallVector<LateInstantiatedAttribute, 16> LateInstantiatedAttrVec; 5639 5640 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 5641 const Decl *Pattern, Decl *Inst, 5642 LateInstantiatedAttrVec *LateAttrs = 0, 5643 LocalInstantiationScope *OuterMostScope = 0); 5644 5645 bool 5646 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 5647 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5648 TemplateSpecializationKind TSK, 5649 bool Complain = true); 5650 5651 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 5652 CXXRecordDecl *Instantiation, 5653 const MultiLevelTemplateArgumentList &TemplateArgs, 5654 TemplateSpecializationKind TSK); 5655 5656 void InstantiateClassTemplateSpecializationMembers( 5657 SourceLocation PointOfInstantiation, 5658 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5659 TemplateSpecializationKind TSK); 5660 5661 NestedNameSpecifierLoc 5662 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 5663 const MultiLevelTemplateArgumentList &TemplateArgs); 5664 5665 DeclarationNameInfo 5666 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 5667 const MultiLevelTemplateArgumentList &TemplateArgs); 5668 TemplateName 5669 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 5670 SourceLocation Loc, 5671 const MultiLevelTemplateArgumentList &TemplateArgs); 5672 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 5673 TemplateArgumentListInfo &Result, 5674 const MultiLevelTemplateArgumentList &TemplateArgs); 5675 5676 void InstantiateExceptionSpec(SourceLocation PointOfInstantiation, 5677 FunctionDecl *Function); 5678 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 5679 FunctionDecl *Function, 5680 bool Recursive = false, 5681 bool DefinitionRequired = false); 5682 void InstantiateStaticDataMemberDefinition( 5683 SourceLocation PointOfInstantiation, 5684 VarDecl *Var, 5685 bool Recursive = false, 5686 bool DefinitionRequired = false); 5687 5688 void InstantiateMemInitializers(CXXConstructorDecl *New, 5689 const CXXConstructorDecl *Tmpl, 5690 const MultiLevelTemplateArgumentList &TemplateArgs); 5691 5692 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 5693 const MultiLevelTemplateArgumentList &TemplateArgs); 5694 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 5695 const MultiLevelTemplateArgumentList &TemplateArgs); 5696 5697 // Objective-C declarations. 5698 enum ObjCContainerKind { 5699 OCK_None = -1, 5700 OCK_Interface = 0, 5701 OCK_Protocol, 5702 OCK_Category, 5703 OCK_ClassExtension, 5704 OCK_Implementation, 5705 OCK_CategoryImplementation 5706 }; 5707 ObjCContainerKind getObjCContainerKind() const; 5708 5709 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 5710 IdentifierInfo *ClassName, 5711 SourceLocation ClassLoc, 5712 IdentifierInfo *SuperName, 5713 SourceLocation SuperLoc, 5714 Decl * const *ProtoRefs, 5715 unsigned NumProtoRefs, 5716 const SourceLocation *ProtoLocs, 5717 SourceLocation EndProtoLoc, 5718 AttributeList *AttrList); 5719 5720 Decl *ActOnCompatiblityAlias( 5721 SourceLocation AtCompatibilityAliasLoc, 5722 IdentifierInfo *AliasName, SourceLocation AliasLocation, 5723 IdentifierInfo *ClassName, SourceLocation ClassLocation); 5724 5725 bool CheckForwardProtocolDeclarationForCircularDependency( 5726 IdentifierInfo *PName, 5727 SourceLocation &PLoc, SourceLocation PrevLoc, 5728 const ObjCList<ObjCProtocolDecl> &PList); 5729 5730 Decl *ActOnStartProtocolInterface( 5731 SourceLocation AtProtoInterfaceLoc, 5732 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 5733 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 5734 const SourceLocation *ProtoLocs, 5735 SourceLocation EndProtoLoc, 5736 AttributeList *AttrList); 5737 5738 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 5739 IdentifierInfo *ClassName, 5740 SourceLocation ClassLoc, 5741 IdentifierInfo *CategoryName, 5742 SourceLocation CategoryLoc, 5743 Decl * const *ProtoRefs, 5744 unsigned NumProtoRefs, 5745 const SourceLocation *ProtoLocs, 5746 SourceLocation EndProtoLoc); 5747 5748 Decl *ActOnStartClassImplementation( 5749 SourceLocation AtClassImplLoc, 5750 IdentifierInfo *ClassName, SourceLocation ClassLoc, 5751 IdentifierInfo *SuperClassname, 5752 SourceLocation SuperClassLoc); 5753 5754 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 5755 IdentifierInfo *ClassName, 5756 SourceLocation ClassLoc, 5757 IdentifierInfo *CatName, 5758 SourceLocation CatLoc); 5759 5760 DeclGroupPtrTy ActOnFinishObjCImplementation(Decl *ObjCImpDecl, 5761 ArrayRef<Decl *> Decls); 5762 5763 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc, 5764 IdentifierInfo **IdentList, 5765 SourceLocation *IdentLocs, 5766 unsigned NumElts); 5767 5768 DeclGroupPtrTy ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 5769 const IdentifierLocPair *IdentList, 5770 unsigned NumElts, 5771 AttributeList *attrList); 5772 5773 void FindProtocolDeclaration(bool WarnOnDeclarations, 5774 const IdentifierLocPair *ProtocolId, 5775 unsigned NumProtocols, 5776 SmallVectorImpl<Decl *> &Protocols); 5777 5778 /// Ensure attributes are consistent with type. 5779 /// \param [in, out] Attributes The attributes to check; they will 5780 /// be modified to be consistent with \arg PropertyTy. 5781 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5782 SourceLocation Loc, 5783 unsigned &Attributes); 5784 5785 /// Process the specified property declaration and create decls for the 5786 /// setters and getters as needed. 5787 /// \param property The property declaration being processed 5788 /// \param DC The semantic container for the property 5789 /// \param redeclaredProperty Declaration for property if redeclared 5790 /// in class extension. 5791 /// \param lexicalDC Container for redeclaredProperty. 5792 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5793 ObjCContainerDecl *DC, 5794 ObjCPropertyDecl *redeclaredProperty = 0, 5795 ObjCContainerDecl *lexicalDC = 0); 5796 5797 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5798 ObjCPropertyDecl *SuperProperty, 5799 const IdentifierInfo *Name); 5800 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5801 5802 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5803 ObjCMethodDecl *MethodDecl, 5804 bool IsInstance); 5805 5806 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5807 5808 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5809 ObjCInterfaceDecl *ID); 5810 5811 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5812 ObjCProtocolDecl *PDecl); 5813 5814 Decl *ActOnAtEnd(Scope *S, SourceRange AtEnd, 5815 Decl **allMethods = 0, unsigned allNum = 0, 5816 Decl **allProperties = 0, unsigned pNum = 0, 5817 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5818 5819 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5820 SourceLocation LParenLoc, 5821 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5822 Selector GetterSel, Selector SetterSel, 5823 bool *OverridingProperty, 5824 tok::ObjCKeywordKind MethodImplKind, 5825 DeclContext *lexicalDC = 0); 5826 5827 Decl *ActOnPropertyImplDecl(Scope *S, 5828 SourceLocation AtLoc, 5829 SourceLocation PropertyLoc, 5830 bool ImplKind, 5831 IdentifierInfo *PropertyId, 5832 IdentifierInfo *PropertyIvar, 5833 SourceLocation PropertyIvarLoc); 5834 5835 enum ObjCSpecialMethodKind { 5836 OSMK_None, 5837 OSMK_Alloc, 5838 OSMK_New, 5839 OSMK_Copy, 5840 OSMK_RetainingInit, 5841 OSMK_NonRetainingInit 5842 }; 5843 5844 struct ObjCArgInfo { 5845 IdentifierInfo *Name; 5846 SourceLocation NameLoc; 5847 // The Type is null if no type was specified, and the DeclSpec is invalid 5848 // in this case. 5849 ParsedType Type; 5850 ObjCDeclSpec DeclSpec; 5851 5852 /// ArgAttrs - Attribute list for this argument. 5853 AttributeList *ArgAttrs; 5854 }; 5855 5856 Decl *ActOnMethodDeclaration( 5857 Scope *S, 5858 SourceLocation BeginLoc, // location of the + or -. 5859 SourceLocation EndLoc, // location of the ; or {. 5860 tok::TokenKind MethodType, 5861 ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5862 ArrayRef<SourceLocation> SelectorLocs, Selector Sel, 5863 // optional arguments. The number of types/arguments is obtained 5864 // from the Sel.getNumArgs(). 5865 ObjCArgInfo *ArgInfo, 5866 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5867 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5868 bool isVariadic, bool MethodDefinition); 5869 5870 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5871 // Will search "local" class/category implementations for a method decl. 5872 // Will also search in class's root looking for instance method. 5873 // Returns 0 if no method is found. 5874 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5875 ObjCInterfaceDecl *CDecl); 5876 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5877 ObjCInterfaceDecl *ClassDecl); 5878 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5879 const ObjCObjectPointerType *OPT, 5880 bool IsInstance); 5881 ObjCMethodDecl *LookupMethodInObjectType(Selector Sel, QualType Ty, 5882 bool IsInstance); 5883 5884 bool inferObjCARCLifetime(ValueDecl *decl); 5885 5886 ExprResult 5887 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5888 Expr *BaseExpr, 5889 SourceLocation OpLoc, 5890 DeclarationName MemberName, 5891 SourceLocation MemberLoc, 5892 SourceLocation SuperLoc, QualType SuperType, 5893 bool Super); 5894 5895 ExprResult 5896 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5897 IdentifierInfo &propertyName, 5898 SourceLocation receiverNameLoc, 5899 SourceLocation propertyNameLoc); 5900 5901 ObjCMethodDecl *tryCaptureObjCSelf(SourceLocation Loc); 5902 5903 /// \brief Describes the kind of message expression indicated by a message 5904 /// send that starts with an identifier. 5905 enum ObjCMessageKind { 5906 /// \brief The message is sent to 'super'. 5907 ObjCSuperMessage, 5908 /// \brief The message is an instance message. 5909 ObjCInstanceMessage, 5910 /// \brief The message is a class message, and the identifier is a type 5911 /// name. 5912 ObjCClassMessage 5913 }; 5914 5915 ObjCMessageKind getObjCMessageKind(Scope *S, 5916 IdentifierInfo *Name, 5917 SourceLocation NameLoc, 5918 bool IsSuper, 5919 bool HasTrailingDot, 5920 ParsedType &ReceiverType); 5921 5922 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5923 Selector Sel, 5924 SourceLocation LBracLoc, 5925 ArrayRef<SourceLocation> SelectorLocs, 5926 SourceLocation RBracLoc, 5927 MultiExprArg Args); 5928 5929 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5930 QualType ReceiverType, 5931 SourceLocation SuperLoc, 5932 Selector Sel, 5933 ObjCMethodDecl *Method, 5934 SourceLocation LBracLoc, 5935 ArrayRef<SourceLocation> SelectorLocs, 5936 SourceLocation RBracLoc, 5937 MultiExprArg Args, 5938 bool isImplicit = false); 5939 5940 ExprResult BuildClassMessageImplicit(QualType ReceiverType, 5941 bool isSuperReceiver, 5942 SourceLocation Loc, 5943 Selector Sel, 5944 ObjCMethodDecl *Method, 5945 MultiExprArg Args); 5946 5947 ExprResult ActOnClassMessage(Scope *S, 5948 ParsedType Receiver, 5949 Selector Sel, 5950 SourceLocation LBracLoc, 5951 ArrayRef<SourceLocation> SelectorLocs, 5952 SourceLocation RBracLoc, 5953 MultiExprArg Args); 5954 5955 ExprResult BuildInstanceMessage(Expr *Receiver, 5956 QualType ReceiverType, 5957 SourceLocation SuperLoc, 5958 Selector Sel, 5959 ObjCMethodDecl *Method, 5960 SourceLocation LBracLoc, 5961 ArrayRef<SourceLocation> SelectorLocs, 5962 SourceLocation RBracLoc, 5963 MultiExprArg Args, 5964 bool isImplicit = false); 5965 5966 ExprResult BuildInstanceMessageImplicit(Expr *Receiver, 5967 QualType ReceiverType, 5968 SourceLocation Loc, 5969 Selector Sel, 5970 ObjCMethodDecl *Method, 5971 MultiExprArg Args); 5972 5973 ExprResult ActOnInstanceMessage(Scope *S, 5974 Expr *Receiver, 5975 Selector Sel, 5976 SourceLocation LBracLoc, 5977 ArrayRef<SourceLocation> SelectorLocs, 5978 SourceLocation RBracLoc, 5979 MultiExprArg Args); 5980 5981 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5982 ObjCBridgeCastKind Kind, 5983 SourceLocation BridgeKeywordLoc, 5984 TypeSourceInfo *TSInfo, 5985 Expr *SubExpr); 5986 5987 ExprResult ActOnObjCBridgedCast(Scope *S, 5988 SourceLocation LParenLoc, 5989 ObjCBridgeCastKind Kind, 5990 SourceLocation BridgeKeywordLoc, 5991 ParsedType Type, 5992 SourceLocation RParenLoc, 5993 Expr *SubExpr); 5994 5995 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5996 5997 /// \brief Check whether the given new method is a valid override of the 5998 /// given overridden method, and set any properties that should be inherited. 5999 void CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 6000 const ObjCMethodDecl *Overridden, 6001 bool IsImplementation); 6002 6003 /// \brief Check whether the given method overrides any methods in its class, 6004 /// calling \c CheckObjCMethodOverride for each overridden method. 6005 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 6006 6007 enum PragmaOptionsAlignKind { 6008 POAK_Native, // #pragma options align=native 6009 POAK_Natural, // #pragma options align=natural 6010 POAK_Packed, // #pragma options align=packed 6011 POAK_Power, // #pragma options align=power 6012 POAK_Mac68k, // #pragma options align=mac68k 6013 POAK_Reset // #pragma options align=reset 6014 }; 6015 6016 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 6017 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 6018 SourceLocation PragmaLoc, 6019 SourceLocation KindLoc); 6020 6021 enum PragmaPackKind { 6022 PPK_Default, // #pragma pack([n]) 6023 PPK_Show, // #pragma pack(show), only supported by MSVC. 6024 PPK_Push, // #pragma pack(push, [identifier], [n]) 6025 PPK_Pop // #pragma pack(pop, [identifier], [n]) 6026 }; 6027 6028 enum PragmaMSStructKind { 6029 PMSST_OFF, // #pragms ms_struct off 6030 PMSST_ON // #pragms ms_struct on 6031 }; 6032 6033 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 6034 void ActOnPragmaPack(PragmaPackKind Kind, 6035 IdentifierInfo *Name, 6036 Expr *Alignment, 6037 SourceLocation PragmaLoc, 6038 SourceLocation LParenLoc, 6039 SourceLocation RParenLoc); 6040 6041 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 6042 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 6043 6044 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 6045 void ActOnPragmaUnused(const Token &Identifier, 6046 Scope *curScope, 6047 SourceLocation PragmaLoc); 6048 6049 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 6050 void ActOnPragmaVisibility(const IdentifierInfo* VisType, 6051 SourceLocation PragmaLoc); 6052 6053 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II, 6054 SourceLocation Loc); 6055 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 6056 6057 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 6058 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 6059 SourceLocation PragmaLoc, 6060 SourceLocation WeakNameLoc); 6061 6062 /// ActOnPragmaRedefineExtname - Called on well formed 6063 /// #pragma redefine_extname oldname newname. 6064 void ActOnPragmaRedefineExtname(IdentifierInfo* WeakName, 6065 IdentifierInfo* AliasName, 6066 SourceLocation PragmaLoc, 6067 SourceLocation WeakNameLoc, 6068 SourceLocation AliasNameLoc); 6069 6070 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 6071 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 6072 IdentifierInfo* AliasName, 6073 SourceLocation PragmaLoc, 6074 SourceLocation WeakNameLoc, 6075 SourceLocation AliasNameLoc); 6076 6077 /// ActOnPragmaFPContract - Called on well formed 6078 /// #pragma {STDC,OPENCL} FP_CONTRACT 6079 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 6080 6081 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 6082 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 6083 void AddAlignmentAttributesForRecord(RecordDecl *RD); 6084 6085 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 6086 void AddMsStructLayoutForRecord(RecordDecl *RD); 6087 6088 /// FreePackedContext - Deallocate and null out PackContext. 6089 void FreePackedContext(); 6090 6091 /// PushNamespaceVisibilityAttr - Note that we've entered a 6092 /// namespace with a visibility attribute. 6093 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr, 6094 SourceLocation Loc); 6095 6096 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 6097 /// add an appropriate visibility attribute. 6098 void AddPushedVisibilityAttribute(Decl *RD); 6099 6100 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 6101 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 6102 void PopPragmaVisibility(bool IsNamespaceEnd, SourceLocation EndLoc); 6103 6104 /// FreeVisContext - Deallocate and null out VisContext. 6105 void FreeVisContext(); 6106 6107 /// AddCFAuditedAttribute - Check whether we're currently within 6108 /// '#pragma clang arc_cf_code_audited' and, if so, consider adding 6109 /// the appropriate attribute. 6110 void AddCFAuditedAttribute(Decl *D); 6111 6112 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 6113 void AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E); 6114 void AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *T); 6115 6116 /// \brief The kind of conversion being performed. 6117 enum CheckedConversionKind { 6118 /// \brief An implicit conversion. 6119 CCK_ImplicitConversion, 6120 /// \brief A C-style cast. 6121 CCK_CStyleCast, 6122 /// \brief A functional-style cast. 6123 CCK_FunctionalCast, 6124 /// \brief A cast other than a C-style cast. 6125 CCK_OtherCast 6126 }; 6127 6128 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 6129 /// cast. If there is already an implicit cast, merge into the existing one. 6130 /// If isLvalue, the result of the cast is an lvalue. 6131 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 6132 ExprValueKind VK = VK_RValue, 6133 const CXXCastPath *BasePath = 0, 6134 CheckedConversionKind CCK 6135 = CCK_ImplicitConversion); 6136 6137 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 6138 /// to the conversion from scalar type ScalarTy to the Boolean type. 6139 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 6140 6141 /// IgnoredValueConversions - Given that an expression's result is 6142 /// syntactically ignored, perform any conversions that are 6143 /// required. 6144 ExprResult IgnoredValueConversions(Expr *E); 6145 6146 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 6147 // functions and arrays to their respective pointers (C99 6.3.2.1). 6148 ExprResult UsualUnaryConversions(Expr *E); 6149 6150 // DefaultFunctionArrayConversion - converts functions and arrays 6151 // to their respective pointers (C99 6.3.2.1). 6152 ExprResult DefaultFunctionArrayConversion(Expr *E); 6153 6154 // DefaultFunctionArrayLvalueConversion - converts functions and 6155 // arrays to their respective pointers and performs the 6156 // lvalue-to-rvalue conversion. 6157 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 6158 6159 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 6160 // the operand. This is DefaultFunctionArrayLvalueConversion, 6161 // except that it assumes the operand isn't of function or array 6162 // type. 6163 ExprResult DefaultLvalueConversion(Expr *E); 6164 6165 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 6166 // do not have a prototype. Integer promotions are performed on each 6167 // argument, and arguments that have type float are promoted to double. 6168 ExprResult DefaultArgumentPromotion(Expr *E); 6169 6170 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 6171 enum VariadicCallType { 6172 VariadicFunction, 6173 VariadicBlock, 6174 VariadicMethod, 6175 VariadicConstructor, 6176 VariadicDoesNotApply 6177 }; 6178 6179 /// GatherArgumentsForCall - Collector argument expressions for various 6180 /// form of call prototypes. 6181 bool GatherArgumentsForCall(SourceLocation CallLoc, 6182 FunctionDecl *FDecl, 6183 const FunctionProtoType *Proto, 6184 unsigned FirstProtoArg, 6185 Expr **Args, unsigned NumArgs, 6186 SmallVector<Expr *, 8> &AllArgs, 6187 VariadicCallType CallType = VariadicDoesNotApply, 6188 bool AllowExplicit = false); 6189 6190 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 6191 // will warn if the resulting type is not a POD type. 6192 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 6193 FunctionDecl *FDecl); 6194 6195 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 6196 // operands and then handles various conversions that are common to binary 6197 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 6198 // routine returns the first non-arithmetic type found. The client is 6199 // responsible for emitting appropriate error diagnostics. 6200 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS, 6201 bool IsCompAssign = false); 6202 6203 /// AssignConvertType - All of the 'assignment' semantic checks return this 6204 /// enum to indicate whether the assignment was allowed. These checks are 6205 /// done for simple assignments, as well as initialization, return from 6206 /// function, argument passing, etc. The query is phrased in terms of a 6207 /// source and destination type. 6208 enum AssignConvertType { 6209 /// Compatible - the types are compatible according to the standard. 6210 Compatible, 6211 6212 /// PointerToInt - The assignment converts a pointer to an int, which we 6213 /// accept as an extension. 6214 PointerToInt, 6215 6216 /// IntToPointer - The assignment converts an int to a pointer, which we 6217 /// accept as an extension. 6218 IntToPointer, 6219 6220 /// FunctionVoidPointer - The assignment is between a function pointer and 6221 /// void*, which the standard doesn't allow, but we accept as an extension. 6222 FunctionVoidPointer, 6223 6224 /// IncompatiblePointer - The assignment is between two pointers types that 6225 /// are not compatible, but we accept them as an extension. 6226 IncompatiblePointer, 6227 6228 /// IncompatiblePointer - The assignment is between two pointers types which 6229 /// point to integers which have a different sign, but are otherwise 6230 /// identical. This is a subset of the above, but broken out because it's by 6231 /// far the most common case of incompatible pointers. 6232 IncompatiblePointerSign, 6233 6234 /// CompatiblePointerDiscardsQualifiers - The assignment discards 6235 /// c/v/r qualifiers, which we accept as an extension. 6236 CompatiblePointerDiscardsQualifiers, 6237 6238 /// IncompatiblePointerDiscardsQualifiers - The assignment 6239 /// discards qualifiers that we don't permit to be discarded, 6240 /// like address spaces. 6241 IncompatiblePointerDiscardsQualifiers, 6242 6243 /// IncompatibleNestedPointerQualifiers - The assignment is between two 6244 /// nested pointer types, and the qualifiers other than the first two 6245 /// levels differ e.g. char ** -> const char **, but we accept them as an 6246 /// extension. 6247 IncompatibleNestedPointerQualifiers, 6248 6249 /// IncompatibleVectors - The assignment is between two vector types that 6250 /// have the same size, which we accept as an extension. 6251 IncompatibleVectors, 6252 6253 /// IntToBlockPointer - The assignment converts an int to a block 6254 /// pointer. We disallow this. 6255 IntToBlockPointer, 6256 6257 /// IncompatibleBlockPointer - The assignment is between two block 6258 /// pointers types that are not compatible. 6259 IncompatibleBlockPointer, 6260 6261 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 6262 /// id type and something else (that is incompatible with it). For example, 6263 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 6264 IncompatibleObjCQualifiedId, 6265 6266 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 6267 /// object with __weak qualifier. 6268 IncompatibleObjCWeakRef, 6269 6270 /// Incompatible - We reject this conversion outright, it is invalid to 6271 /// represent it in the AST. 6272 Incompatible 6273 }; 6274 6275 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 6276 /// assignment conversion type specified by ConvTy. This returns true if the 6277 /// conversion was invalid or false if the conversion was accepted. 6278 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 6279 SourceLocation Loc, 6280 QualType DstType, QualType SrcType, 6281 Expr *SrcExpr, AssignmentAction Action, 6282 bool *Complained = 0); 6283 6284 /// CheckAssignmentConstraints - Perform type checking for assignment, 6285 /// argument passing, variable initialization, and function return values. 6286 /// C99 6.5.16. 6287 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 6288 QualType LHSType, 6289 QualType RHSType); 6290 6291 /// Check assignment constraints and prepare for a conversion of the 6292 /// RHS to the LHS type. 6293 AssignConvertType CheckAssignmentConstraints(QualType LHSType, 6294 ExprResult &RHS, 6295 CastKind &Kind); 6296 6297 // CheckSingleAssignmentConstraints - Currently used by 6298 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 6299 // this routine performs the default function/array converions. 6300 AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType, 6301 ExprResult &RHS, 6302 bool Diagnose = true); 6303 6304 // \brief If the lhs type is a transparent union, check whether we 6305 // can initialize the transparent union with the given expression. 6306 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType, 6307 ExprResult &RHS); 6308 6309 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 6310 6311 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 6312 6313 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6314 AssignmentAction Action, 6315 bool AllowExplicit = false); 6316 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6317 AssignmentAction Action, 6318 bool AllowExplicit, 6319 ImplicitConversionSequence& ICS); 6320 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6321 const ImplicitConversionSequence& ICS, 6322 AssignmentAction Action, 6323 CheckedConversionKind CCK 6324 = CCK_ImplicitConversion); 6325 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6326 const StandardConversionSequence& SCS, 6327 AssignmentAction Action, 6328 CheckedConversionKind CCK); 6329 6330 /// the following "Check" methods will return a valid/converted QualType 6331 /// or a null QualType (indicating an error diagnostic was issued). 6332 6333 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 6334 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS, 6335 ExprResult &RHS); 6336 QualType CheckPointerToMemberOperands( // C++ 5.5 6337 ExprResult &LHS, ExprResult &RHS, ExprValueKind &VK, 6338 SourceLocation OpLoc, bool isIndirect); 6339 QualType CheckMultiplyDivideOperands( // C99 6.5.5 6340 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign, 6341 bool IsDivide); 6342 QualType CheckRemainderOperands( // C99 6.5.5 6343 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6344 bool IsCompAssign = false); 6345 QualType CheckAdditionOperands( // C99 6.5.6 6346 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 6347 QualType* CompLHSTy = 0); 6348 QualType CheckSubtractionOperands( // C99 6.5.6 6349 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6350 QualType* CompLHSTy = 0); 6351 QualType CheckShiftOperands( // C99 6.5.7 6352 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 6353 bool IsCompAssign = false); 6354 QualType CheckCompareOperands( // C99 6.5.8/9 6355 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned OpaqueOpc, 6356 bool isRelational); 6357 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 6358 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6359 bool IsCompAssign = false); 6360 QualType CheckLogicalOperands( // C99 6.5.[13,14] 6361 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc); 6362 // CheckAssignmentOperands is used for both simple and compound assignment. 6363 // For simple assignment, pass both expressions and a null converted type. 6364 // For compound assignment, pass both expressions and the converted type. 6365 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 6366 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType); 6367 6368 ExprResult checkPseudoObjectIncDec(Scope *S, SourceLocation OpLoc, 6369 UnaryOperatorKind Opcode, Expr *Op); 6370 ExprResult checkPseudoObjectAssignment(Scope *S, SourceLocation OpLoc, 6371 BinaryOperatorKind Opcode, 6372 Expr *LHS, Expr *RHS); 6373 ExprResult checkPseudoObjectRValue(Expr *E); 6374 Expr *recreateSyntacticForm(PseudoObjectExpr *E); 6375 6376 QualType CheckConditionalOperands( // C99 6.5.15 6377 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS, 6378 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc); 6379 QualType CXXCheckConditionalOperands( // C++ 5.16 6380 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 6381 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 6382 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 6383 bool *NonStandardCompositeType = 0); 6384 QualType FindCompositePointerType(SourceLocation Loc, 6385 ExprResult &E1, ExprResult &E2, 6386 bool *NonStandardCompositeType = 0) { 6387 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 6388 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, 6389 NonStandardCompositeType); 6390 E1 = Owned(E1Tmp); 6391 E2 = Owned(E2Tmp); 6392 return Composite; 6393 } 6394 6395 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 6396 SourceLocation QuestionLoc); 6397 6398 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr, 6399 SourceLocation QuestionLoc); 6400 6401 /// type checking for vector binary operators. 6402 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS, 6403 SourceLocation Loc, bool IsCompAssign); 6404 QualType GetSignedVectorType(QualType V); 6405 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS, 6406 SourceLocation Loc, bool isRelational); 6407 QualType CheckVectorLogicalOperands(ExprResult &LHS, ExprResult &RHS, 6408 SourceLocation Loc); 6409 6410 /// type checking declaration initializers (C99 6.7.8) 6411 bool CheckForConstantInitializer(Expr *e, QualType t); 6412 6413 // type checking C++ declaration initializers (C++ [dcl.init]). 6414 6415 /// ReferenceCompareResult - Expresses the result of comparing two 6416 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 6417 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 6418 enum ReferenceCompareResult { 6419 /// Ref_Incompatible - The two types are incompatible, so direct 6420 /// reference binding is not possible. 6421 Ref_Incompatible = 0, 6422 /// Ref_Related - The two types are reference-related, which means 6423 /// that their unqualified forms (T1 and T2) are either the same 6424 /// or T1 is a base class of T2. 6425 Ref_Related, 6426 /// Ref_Compatible_With_Added_Qualification - The two types are 6427 /// reference-compatible with added qualification, meaning that 6428 /// they are reference-compatible and the qualifiers on T1 (cv1) 6429 /// are greater than the qualifiers on T2 (cv2). 6430 Ref_Compatible_With_Added_Qualification, 6431 /// Ref_Compatible - The two types are reference-compatible and 6432 /// have equivalent qualifiers (cv1 == cv2). 6433 Ref_Compatible 6434 }; 6435 6436 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 6437 QualType T1, QualType T2, 6438 bool &DerivedToBase, 6439 bool &ObjCConversion, 6440 bool &ObjCLifetimeConversion); 6441 6442 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType, 6443 Expr *CastExpr, CastKind &CastKind, 6444 ExprValueKind &VK, CXXCastPath &Path); 6445 6446 /// \brief Force an expression with unknown-type to an expression of the 6447 /// given type. 6448 ExprResult forceUnknownAnyToType(Expr *E, QualType ToType); 6449 6450 // CheckVectorCast - check type constraints for vectors. 6451 // Since vectors are an extension, there are no C standard reference for this. 6452 // We allow casting between vectors and integer datatypes of the same size. 6453 // returns true if the cast is invalid 6454 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 6455 CastKind &Kind); 6456 6457 // CheckExtVectorCast - check type constraints for extended vectors. 6458 // Since vectors are an extension, there are no C standard reference for this. 6459 // We allow casting between vectors and integer datatypes of the same size, 6460 // or vectors and the element type of that vector. 6461 // returns the cast expr 6462 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr, 6463 CastKind &Kind); 6464 6465 ExprResult BuildCXXFunctionalCastExpr(TypeSourceInfo *TInfo, 6466 SourceLocation LParenLoc, 6467 Expr *CastExpr, 6468 SourceLocation RParenLoc); 6469 6470 enum ARCConversionResult { ACR_okay, ACR_unbridged }; 6471 6472 /// \brief Checks for invalid conversions and casts between 6473 /// retainable pointers and other pointer kinds. 6474 ARCConversionResult CheckObjCARCConversion(SourceRange castRange, 6475 QualType castType, Expr *&op, 6476 CheckedConversionKind CCK); 6477 6478 Expr *stripARCUnbridgedCast(Expr *e); 6479 void diagnoseARCUnbridgedCast(Expr *e); 6480 6481 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 6482 QualType ExprType); 6483 6484 /// checkRetainCycles - Check whether an Objective-C message send 6485 /// might create an obvious retain cycle. 6486 void checkRetainCycles(ObjCMessageExpr *msg); 6487 void checkRetainCycles(Expr *receiver, Expr *argument); 6488 6489 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 6490 /// to weak/__unsafe_unretained type. 6491 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 6492 6493 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 6494 /// to weak/__unsafe_unretained expression. 6495 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 6496 6497 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 6498 /// \param Method - May be null. 6499 /// \param [out] ReturnType - The return type of the send. 6500 /// \return true iff there were any incompatible types. 6501 bool CheckMessageArgumentTypes(QualType ReceiverType, 6502 Expr **Args, unsigned NumArgs, Selector Sel, 6503 ObjCMethodDecl *Method, bool isClassMessage, 6504 bool isSuperMessage, 6505 SourceLocation lbrac, SourceLocation rbrac, 6506 QualType &ReturnType, ExprValueKind &VK); 6507 6508 /// \brief Determine the result of a message send expression based on 6509 /// the type of the receiver, the method expected to receive the message, 6510 /// and the form of the message send. 6511 QualType getMessageSendResultType(QualType ReceiverType, 6512 ObjCMethodDecl *Method, 6513 bool isClassMessage, bool isSuperMessage); 6514 6515 /// \brief If the given expression involves a message send to a method 6516 /// with a related result type, emit a note describing what happened. 6517 void EmitRelatedResultTypeNote(const Expr *E); 6518 6519 /// CheckBooleanCondition - Diagnose problems involving the use of 6520 /// the given expression as a boolean condition (e.g. in an if 6521 /// statement). Also performs the standard function and array 6522 /// decays, possibly changing the input variable. 6523 /// 6524 /// \param Loc - A location associated with the condition, e.g. the 6525 /// 'if' keyword. 6526 /// \return true iff there were any errors 6527 ExprResult CheckBooleanCondition(Expr *E, SourceLocation Loc); 6528 6529 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 6530 Expr *SubExpr); 6531 6532 /// DiagnoseAssignmentAsCondition - Given that an expression is 6533 /// being used as a boolean condition, warn if it's an assignment. 6534 void DiagnoseAssignmentAsCondition(Expr *E); 6535 6536 /// \brief Redundant parentheses over an equality comparison can indicate 6537 /// that the user intended an assignment used as condition. 6538 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE); 6539 6540 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 6541 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 6542 6543 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 6544 /// the specified width and sign. If an overflow occurs, detect it and emit 6545 /// the specified diagnostic. 6546 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 6547 unsigned NewWidth, bool NewSign, 6548 SourceLocation Loc, unsigned DiagID); 6549 6550 /// Checks that the Objective-C declaration is declared in the global scope. 6551 /// Emits an error and marks the declaration as invalid if it's not declared 6552 /// in the global scope. 6553 bool CheckObjCDeclScope(Decl *D); 6554 6555 /// VerifyIntegerConstantExpression - Verifies that an expression is an ICE, 6556 /// and reports the appropriate diagnostics. Returns false on success. 6557 /// Can optionally return the value of the expression. 6558 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, 6559 PartialDiagnostic Diag, 6560 bool AllowFold, 6561 PartialDiagnostic FoldDiag); 6562 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, 6563 PartialDiagnostic Diag, 6564 bool AllowFold = true) { 6565 return VerifyIntegerConstantExpression(E, Result, Diag, AllowFold, 6566 PDiag(0)); 6567 } 6568 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result = 0); 6569 6570 /// VerifyBitField - verifies that a bit field expression is an ICE and has 6571 /// the correct width, and that the field type is valid. 6572 /// Returns false on success. 6573 /// Can optionally return whether the bit-field is of width 0 6574 ExprResult VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 6575 QualType FieldTy, Expr *BitWidth, 6576 bool *ZeroWidth = 0); 6577 6578 enum CUDAFunctionTarget { 6579 CFT_Device, 6580 CFT_Global, 6581 CFT_Host, 6582 CFT_HostDevice 6583 }; 6584 6585 CUDAFunctionTarget IdentifyCUDATarget(const FunctionDecl *D); 6586 6587 bool CheckCUDATarget(CUDAFunctionTarget CallerTarget, 6588 CUDAFunctionTarget CalleeTarget); 6589 6590 bool CheckCUDATarget(const FunctionDecl *Caller, const FunctionDecl *Callee) { 6591 return CheckCUDATarget(IdentifyCUDATarget(Caller), 6592 IdentifyCUDATarget(Callee)); 6593 } 6594 6595 /// \name Code completion 6596 //@{ 6597 /// \brief Describes the context in which code completion occurs. 6598 enum ParserCompletionContext { 6599 /// \brief Code completion occurs at top-level or namespace context. 6600 PCC_Namespace, 6601 /// \brief Code completion occurs within a class, struct, or union. 6602 PCC_Class, 6603 /// \brief Code completion occurs within an Objective-C interface, protocol, 6604 /// or category. 6605 PCC_ObjCInterface, 6606 /// \brief Code completion occurs within an Objective-C implementation or 6607 /// category implementation 6608 PCC_ObjCImplementation, 6609 /// \brief Code completion occurs within the list of instance variables 6610 /// in an Objective-C interface, protocol, category, or implementation. 6611 PCC_ObjCInstanceVariableList, 6612 /// \brief Code completion occurs following one or more template 6613 /// headers. 6614 PCC_Template, 6615 /// \brief Code completion occurs following one or more template 6616 /// headers within a class. 6617 PCC_MemberTemplate, 6618 /// \brief Code completion occurs within an expression. 6619 PCC_Expression, 6620 /// \brief Code completion occurs within a statement, which may 6621 /// also be an expression or a declaration. 6622 PCC_Statement, 6623 /// \brief Code completion occurs at the beginning of the 6624 /// initialization statement (or expression) in a for loop. 6625 PCC_ForInit, 6626 /// \brief Code completion occurs within the condition of an if, 6627 /// while, switch, or for statement. 6628 PCC_Condition, 6629 /// \brief Code completion occurs within the body of a function on a 6630 /// recovery path, where we do not have a specific handle on our position 6631 /// in the grammar. 6632 PCC_RecoveryInFunction, 6633 /// \brief Code completion occurs where only a type is permitted. 6634 PCC_Type, 6635 /// \brief Code completion occurs in a parenthesized expression, which 6636 /// might also be a type cast. 6637 PCC_ParenthesizedExpression, 6638 /// \brief Code completion occurs within a sequence of declaration 6639 /// specifiers within a function, method, or block. 6640 PCC_LocalDeclarationSpecifiers 6641 }; 6642 6643 void CodeCompleteModuleImport(SourceLocation ImportLoc, ModuleIdPath Path); 6644 void CodeCompleteOrdinaryName(Scope *S, 6645 ParserCompletionContext CompletionContext); 6646 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 6647 bool AllowNonIdentifiers, 6648 bool AllowNestedNameSpecifiers); 6649 6650 struct CodeCompleteExpressionData; 6651 void CodeCompleteExpression(Scope *S, 6652 const CodeCompleteExpressionData &Data); 6653 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 6654 SourceLocation OpLoc, 6655 bool IsArrow); 6656 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 6657 void CodeCompleteTag(Scope *S, unsigned TagSpec); 6658 void CodeCompleteTypeQualifiers(DeclSpec &DS); 6659 void CodeCompleteCase(Scope *S); 6660 void CodeCompleteCall(Scope *S, Expr *Fn, llvm::ArrayRef<Expr *> Args); 6661 void CodeCompleteInitializer(Scope *S, Decl *D); 6662 void CodeCompleteReturn(Scope *S); 6663 void CodeCompleteAfterIf(Scope *S); 6664 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 6665 6666 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 6667 bool EnteringContext); 6668 void CodeCompleteUsing(Scope *S); 6669 void CodeCompleteUsingDirective(Scope *S); 6670 void CodeCompleteNamespaceDecl(Scope *S); 6671 void CodeCompleteNamespaceAliasDecl(Scope *S); 6672 void CodeCompleteOperatorName(Scope *S); 6673 void CodeCompleteConstructorInitializer(Decl *Constructor, 6674 CXXCtorInitializer** Initializers, 6675 unsigned NumInitializers); 6676 void CodeCompleteLambdaIntroducer(Scope *S, LambdaIntroducer &Intro, 6677 bool AfterAmpersand); 6678 6679 void CodeCompleteObjCAtDirective(Scope *S); 6680 void CodeCompleteObjCAtVisibility(Scope *S); 6681 void CodeCompleteObjCAtStatement(Scope *S); 6682 void CodeCompleteObjCAtExpression(Scope *S); 6683 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 6684 void CodeCompleteObjCPropertyGetter(Scope *S); 6685 void CodeCompleteObjCPropertySetter(Scope *S); 6686 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 6687 bool IsParameter); 6688 void CodeCompleteObjCMessageReceiver(Scope *S); 6689 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 6690 IdentifierInfo **SelIdents, 6691 unsigned NumSelIdents, 6692 bool AtArgumentExpression); 6693 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 6694 IdentifierInfo **SelIdents, 6695 unsigned NumSelIdents, 6696 bool AtArgumentExpression, 6697 bool IsSuper = false); 6698 void CodeCompleteObjCInstanceMessage(Scope *S, Expr *Receiver, 6699 IdentifierInfo **SelIdents, 6700 unsigned NumSelIdents, 6701 bool AtArgumentExpression, 6702 ObjCInterfaceDecl *Super = 0); 6703 void CodeCompleteObjCForCollection(Scope *S, 6704 DeclGroupPtrTy IterationVar); 6705 void CodeCompleteObjCSelector(Scope *S, 6706 IdentifierInfo **SelIdents, 6707 unsigned NumSelIdents); 6708 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 6709 unsigned NumProtocols); 6710 void CodeCompleteObjCProtocolDecl(Scope *S); 6711 void CodeCompleteObjCInterfaceDecl(Scope *S); 6712 void CodeCompleteObjCSuperclass(Scope *S, 6713 IdentifierInfo *ClassName, 6714 SourceLocation ClassNameLoc); 6715 void CodeCompleteObjCImplementationDecl(Scope *S); 6716 void CodeCompleteObjCInterfaceCategory(Scope *S, 6717 IdentifierInfo *ClassName, 6718 SourceLocation ClassNameLoc); 6719 void CodeCompleteObjCImplementationCategory(Scope *S, 6720 IdentifierInfo *ClassName, 6721 SourceLocation ClassNameLoc); 6722 void CodeCompleteObjCPropertyDefinition(Scope *S); 6723 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 6724 IdentifierInfo *PropertyName); 6725 void CodeCompleteObjCMethodDecl(Scope *S, 6726 bool IsInstanceMethod, 6727 ParsedType ReturnType); 6728 void CodeCompleteObjCMethodDeclSelector(Scope *S, 6729 bool IsInstanceMethod, 6730 bool AtParameterName, 6731 ParsedType ReturnType, 6732 IdentifierInfo **SelIdents, 6733 unsigned NumSelIdents); 6734 void CodeCompletePreprocessorDirective(bool InConditional); 6735 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 6736 void CodeCompletePreprocessorMacroName(bool IsDefinition); 6737 void CodeCompletePreprocessorExpression(); 6738 void CodeCompletePreprocessorMacroArgument(Scope *S, 6739 IdentifierInfo *Macro, 6740 MacroInfo *MacroInfo, 6741 unsigned Argument); 6742 void CodeCompleteNaturalLanguage(); 6743 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 6744 CodeCompletionTUInfo &CCTUInfo, 6745 SmallVectorImpl<CodeCompletionResult> &Results); 6746 //@} 6747 6748 //===--------------------------------------------------------------------===// 6749 // Extra semantic analysis beyond the C type system 6750 6751public: 6752 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 6753 unsigned ByteNo) const; 6754 6755private: 6756 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr, 6757 const ArraySubscriptExpr *ASE=0, 6758 bool AllowOnePastEnd=true, bool IndexNegated=false); 6759 void CheckArrayAccess(const Expr *E); 6760 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 6761 bool CheckObjCMethodCall(ObjCMethodDecl *Method, SourceLocation loc, 6762 Expr **Args, unsigned NumArgs); 6763 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 6764 6765 bool CheckObjCString(Expr *Arg); 6766 6767 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6768 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6769 6770 bool SemaBuiltinVAStart(CallExpr *TheCall); 6771 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 6772 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 6773 6774public: 6775 // Used by C++ template instantiation. 6776 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 6777 6778private: 6779 bool SemaBuiltinPrefetch(CallExpr *TheCall); 6780 bool SemaBuiltinObjectSize(CallExpr *TheCall); 6781 bool SemaBuiltinLongjmp(CallExpr *TheCall); 6782 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 6783 ExprResult SemaAtomicOpsOverloaded(ExprResult TheCallResult, 6784 AtomicExpr::AtomicOp Op); 6785 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 6786 llvm::APSInt &Result); 6787 6788 enum FormatStringType { 6789 FST_Scanf, 6790 FST_Printf, 6791 FST_NSString, 6792 FST_Strftime, 6793 FST_Strfmon, 6794 FST_Kprintf, 6795 FST_Unknown 6796 }; 6797 static FormatStringType GetFormatStringType(const FormatAttr *Format); 6798 bool SemaCheckStringLiteral(const Expr *E, Expr **Args, unsigned NumArgs, 6799 bool HasVAListArg, unsigned format_idx, 6800 unsigned firstDataArg, FormatStringType Type, 6801 bool inFunctionCall = true); 6802 6803 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 6804 Expr **Args, unsigned NumArgs, bool HasVAListArg, 6805 unsigned format_idx, unsigned firstDataArg, 6806 FormatStringType Type, bool inFunctionCall); 6807 6808 void CheckFormatArguments(const FormatAttr *Format, CallExpr *TheCall); 6809 void CheckFormatArguments(const FormatAttr *Format, Expr **Args, 6810 unsigned NumArgs, bool IsCXXMember, 6811 SourceLocation Loc, SourceRange Range); 6812 void CheckFormatArguments(Expr **Args, unsigned NumArgs, 6813 bool HasVAListArg, unsigned format_idx, 6814 unsigned firstDataArg, FormatStringType Type, 6815 SourceLocation Loc, SourceRange range); 6816 6817 void CheckNonNullArguments(const NonNullAttr *NonNull, 6818 const Expr * const *ExprArgs, 6819 SourceLocation CallSiteLoc); 6820 6821 void CheckMemaccessArguments(const CallExpr *Call, 6822 unsigned BId, 6823 IdentifierInfo *FnName); 6824 6825 void CheckStrlcpycatArguments(const CallExpr *Call, 6826 IdentifierInfo *FnName); 6827 6828 void CheckStrncatArguments(const CallExpr *Call, 6829 IdentifierInfo *FnName); 6830 6831 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 6832 SourceLocation ReturnLoc); 6833 void CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr* RHS); 6834 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 6835 6836 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 6837 Expr *Init); 6838 6839 /// \brief The parser's current scope. 6840 /// 6841 /// The parser maintains this state here. 6842 Scope *CurScope; 6843 6844protected: 6845 friend class Parser; 6846 friend class InitializationSequence; 6847 friend class ASTReader; 6848 friend class ASTWriter; 6849 6850public: 6851 /// \brief Retrieve the parser's current scope. 6852 /// 6853 /// This routine must only be used when it is certain that semantic analysis 6854 /// and the parser are in precisely the same context, which is not the case 6855 /// when, e.g., we are performing any kind of template instantiation. 6856 /// Therefore, the only safe places to use this scope are in the parser 6857 /// itself and in routines directly invoked from the parser and *never* from 6858 /// template substitution or instantiation. 6859 Scope *getCurScope() const { return CurScope; } 6860 6861 Decl *getObjCDeclContext() const; 6862 6863 DeclContext *getCurLexicalContext() const { 6864 return OriginalLexicalContext ? OriginalLexicalContext : CurContext; 6865 } 6866 6867 AvailabilityResult getCurContextAvailability() const; 6868}; 6869 6870/// \brief RAII object that enters a new expression evaluation context. 6871class EnterExpressionEvaluationContext { 6872 Sema &Actions; 6873 6874public: 6875 EnterExpressionEvaluationContext(Sema &Actions, 6876 Sema::ExpressionEvaluationContext NewContext, 6877 Decl *LambdaContextDecl = 0, 6878 bool IsDecltype = false) 6879 : Actions(Actions) { 6880 Actions.PushExpressionEvaluationContext(NewContext, LambdaContextDecl, 6881 IsDecltype); 6882 } 6883 6884 ~EnterExpressionEvaluationContext() { 6885 Actions.PopExpressionEvaluationContext(); 6886 } 6887}; 6888 6889} // end namespace clang 6890 6891#endif 6892