Sema.h revision f6e2e0291b8964ed41b4325e21dd90b86e791f10
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/DeclarationName.h" 29#include "clang/AST/ExternalASTSource.h" 30#include "clang/AST/TypeLoc.h" 31#include "clang/Lex/ModuleLoader.h" 32#include "clang/Basic/Specifiers.h" 33#include "clang/Basic/TemplateKinds.h" 34#include "clang/Basic/TypeTraits.h" 35#include "clang/Basic/ExpressionTraits.h" 36#include "llvm/ADT/ArrayRef.h" 37#include "llvm/ADT/OwningPtr.h" 38#include "llvm/ADT/SmallPtrSet.h" 39#include "llvm/ADT/SmallVector.h" 40#include <deque> 41#include <string> 42 43namespace llvm { 44 class APSInt; 45 template <typename ValueT> struct DenseMapInfo; 46 template <typename ValueT, typename ValueInfoT> class DenseSet; 47 class SmallBitVector; 48} 49 50namespace clang { 51 class ADLResult; 52 class ASTConsumer; 53 class ASTContext; 54 class ASTMutationListener; 55 class ASTReader; 56 class ASTWriter; 57 class ArrayType; 58 class AttributeList; 59 class BlockDecl; 60 class CXXBasePath; 61 class CXXBasePaths; 62 typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 63 class CXXConstructorDecl; 64 class CXXConversionDecl; 65 class CXXDestructorDecl; 66 class CXXFieldCollector; 67 class CXXMemberCallExpr; 68 class CXXMethodDecl; 69 class CXXScopeSpec; 70 class CXXTemporary; 71 class CXXTryStmt; 72 class CallExpr; 73 class ClassTemplateDecl; 74 class ClassTemplatePartialSpecializationDecl; 75 class ClassTemplateSpecializationDecl; 76 class CodeCompleteConsumer; 77 class CodeCompletionAllocator; 78 class CodeCompletionResult; 79 class Decl; 80 class DeclAccessPair; 81 class DeclContext; 82 class DeclRefExpr; 83 class DeclaratorDecl; 84 class DeducedTemplateArgument; 85 class DependentDiagnostic; 86 class DesignatedInitExpr; 87 class Designation; 88 class EnumConstantDecl; 89 class Expr; 90 class ExtVectorType; 91 class ExternalSemaSource; 92 class FormatAttr; 93 class FriendDecl; 94 class FunctionDecl; 95 class FunctionProtoType; 96 class FunctionTemplateDecl; 97 class ImplicitConversionSequence; 98 class InitListExpr; 99 class InitializationKind; 100 class InitializationSequence; 101 class InitializedEntity; 102 class IntegerLiteral; 103 class LabelStmt; 104 class LambdaExpr; 105 class LangOptions; 106 class LocalInstantiationScope; 107 class LookupResult; 108 class MacroInfo; 109 class MultiLevelTemplateArgumentList; 110 class NamedDecl; 111 class NonNullAttr; 112 class ObjCCategoryDecl; 113 class ObjCCategoryImplDecl; 114 class ObjCCompatibleAliasDecl; 115 class ObjCContainerDecl; 116 class ObjCImplDecl; 117 class ObjCImplementationDecl; 118 class ObjCInterfaceDecl; 119 class ObjCIvarDecl; 120 template <class T> class ObjCList; 121 class ObjCMessageExpr; 122 class ObjCMethodDecl; 123 class ObjCPropertyDecl; 124 class ObjCProtocolDecl; 125 class OverloadCandidateSet; 126 class OverloadExpr; 127 class ParenListExpr; 128 class ParmVarDecl; 129 class Preprocessor; 130 class PseudoDestructorTypeStorage; 131 class PseudoObjectExpr; 132 class QualType; 133 class StandardConversionSequence; 134 class Stmt; 135 class StringLiteral; 136 class SwitchStmt; 137 class TargetAttributesSema; 138 class TemplateArgument; 139 class TemplateArgumentList; 140 class TemplateArgumentLoc; 141 class TemplateDecl; 142 class TemplateParameterList; 143 class TemplatePartialOrderingContext; 144 class TemplateTemplateParmDecl; 145 class Token; 146 class TypeAliasDecl; 147 class TypedefDecl; 148 class TypedefNameDecl; 149 class TypeLoc; 150 class UnqualifiedId; 151 class UnresolvedLookupExpr; 152 class UnresolvedMemberExpr; 153 class UnresolvedSetImpl; 154 class UnresolvedSetIterator; 155 class UsingDecl; 156 class UsingShadowDecl; 157 class ValueDecl; 158 class VarDecl; 159 class VisibilityAttr; 160 class VisibleDeclConsumer; 161 class IndirectFieldDecl; 162 163namespace sema { 164 class AccessedEntity; 165 class BlockScopeInfo; 166 class CompoundScopeInfo; 167 class DelayedDiagnostic; 168 class FunctionScopeInfo; 169 class LambdaScopeInfo; 170 class PossiblyUnreachableDiag; 171 class TemplateDeductionInfo; 172} 173 174// FIXME: No way to easily map from TemplateTypeParmTypes to 175// TemplateTypeParmDecls, so we have this horrible PointerUnion. 176typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 177 SourceLocation> UnexpandedParameterPack; 178 179/// Sema - This implements semantic analysis and AST building for C. 180class Sema { 181 Sema(const Sema&); // DO NOT IMPLEMENT 182 void operator=(const Sema&); // DO NOT IMPLEMENT 183 mutable const TargetAttributesSema* TheTargetAttributesSema; 184public: 185 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 186 typedef OpaquePtr<TemplateName> TemplateTy; 187 typedef OpaquePtr<QualType> TypeTy; 188 189 OpenCLOptions OpenCLFeatures; 190 FPOptions FPFeatures; 191 192 const LangOptions &LangOpts; 193 Preprocessor &PP; 194 ASTContext &Context; 195 ASTConsumer &Consumer; 196 DiagnosticsEngine &Diags; 197 SourceManager &SourceMgr; 198 199 /// \brief Flag indicating whether or not to collect detailed statistics. 200 bool CollectStats; 201 202 /// \brief Source of additional semantic information. 203 ExternalSemaSource *ExternalSource; 204 205 /// \brief Code-completion consumer. 206 CodeCompleteConsumer *CodeCompleter; 207 208 /// CurContext - This is the current declaration context of parsing. 209 DeclContext *CurContext; 210 211 /// \brief Generally null except when we temporarily switch decl contexts, 212 /// like in \see ActOnObjCTemporaryExitContainerContext. 213 DeclContext *OriginalLexicalContext; 214 215 /// VAListTagName - The declaration name corresponding to __va_list_tag. 216 /// This is used as part of a hack to omit that class from ADL results. 217 DeclarationName VAListTagName; 218 219 /// PackContext - Manages the stack for #pragma pack. An alignment 220 /// of 0 indicates default alignment. 221 void *PackContext; // Really a "PragmaPackStack*" 222 223 bool MSStructPragmaOn; // True when #pragma ms_struct on 224 225 /// VisContext - Manages the stack for #pragma GCC visibility. 226 void *VisContext; // Really a "PragmaVisStack*" 227 228 /// ExprNeedsCleanups - True if the current evaluation context 229 /// requires cleanups to be run at its conclusion. 230 bool ExprNeedsCleanups; 231 232 /// ExprCleanupObjects - This is the stack of objects requiring 233 /// cleanup that are created by the current full expression. The 234 /// element type here is ExprWithCleanups::Object. 235 SmallVector<BlockDecl*, 8> ExprCleanupObjects; 236 237 llvm::SmallPtrSet<Expr*, 8> MaybeODRUseExprs; 238 239 /// \brief Stack containing information about each of the nested 240 /// function, block, and method scopes that are currently active. 241 /// 242 /// This array is never empty. Clients should ignore the first 243 /// element, which is used to cache a single FunctionScopeInfo 244 /// that's used to parse every top-level function. 245 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 246 247 typedef LazyVector<TypedefNameDecl *, ExternalSemaSource, 248 &ExternalSemaSource::ReadExtVectorDecls, 2, 2> 249 ExtVectorDeclsType; 250 251 /// ExtVectorDecls - This is a list all the extended vector types. This allows 252 /// us to associate a raw vector type with one of the ext_vector type names. 253 /// This is only necessary for issuing pretty diagnostics. 254 ExtVectorDeclsType ExtVectorDecls; 255 256 /// \brief The set of types for which we have already complained about the 257 /// definitions being hidden. 258 /// 259 /// This set is used to suppress redundant diagnostics. 260 llvm::SmallPtrSet<NamedDecl *, 4> HiddenDefinitions; 261 262 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 263 OwningPtr<CXXFieldCollector> FieldCollector; 264 265 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 266 267 /// PureVirtualClassDiagSet - a set of class declarations which we have 268 /// emitted a list of pure virtual functions. Used to prevent emitting the 269 /// same list more than once. 270 OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 271 272 /// ParsingInitForAutoVars - a set of declarations with auto types for which 273 /// we are currently parsing the initializer. 274 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 275 276 /// \brief A mapping from external names to the most recent 277 /// locally-scoped external declaration with that name. 278 /// 279 /// This map contains external declarations introduced in local 280 /// scoped, e.g., 281 /// 282 /// \code 283 /// void f() { 284 /// void foo(int, int); 285 /// } 286 /// \endcode 287 /// 288 /// Here, the name "foo" will be associated with the declaration on 289 /// "foo" within f. This name is not visible outside of 290 /// "f". However, we still find it in two cases: 291 /// 292 /// - If we are declaring another external with the name "foo", we 293 /// can find "foo" as a previous declaration, so that the types 294 /// of this external declaration can be checked for 295 /// compatibility. 296 /// 297 /// - If we would implicitly declare "foo" (e.g., due to a call to 298 /// "foo" in C when no prototype or definition is visible), then 299 /// we find this declaration of "foo" and complain that it is 300 /// not visible. 301 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 302 303 /// \brief Look for a locally scoped external declaration by the given name. 304 llvm::DenseMap<DeclarationName, NamedDecl *>::iterator 305 findLocallyScopedExternalDecl(DeclarationName Name); 306 307 typedef LazyVector<VarDecl *, ExternalSemaSource, 308 &ExternalSemaSource::ReadTentativeDefinitions, 2, 2> 309 TentativeDefinitionsType; 310 311 /// \brief All the tentative definitions encountered in the TU. 312 TentativeDefinitionsType TentativeDefinitions; 313 314 typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource, 315 &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2> 316 UnusedFileScopedDeclsType; 317 318 /// \brief The set of file scoped decls seen so far that have not been used 319 /// and must warn if not used. Only contains the first declaration. 320 UnusedFileScopedDeclsType UnusedFileScopedDecls; 321 322 typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource, 323 &ExternalSemaSource::ReadDelegatingConstructors, 2, 2> 324 DelegatingCtorDeclsType; 325 326 /// \brief All the delegating constructors seen so far in the file, used for 327 /// cycle detection at the end of the TU. 328 DelegatingCtorDeclsType DelegatingCtorDecls; 329 330 /// \brief All the overriding destructors seen during a class definition 331 /// (there could be multiple due to nested classes) that had their exception 332 /// spec checks delayed, plus the overridden destructor. 333 SmallVector<std::pair<const CXXDestructorDecl*, 334 const CXXDestructorDecl*>, 2> 335 DelayedDestructorExceptionSpecChecks; 336 337 /// \brief Callback to the parser to parse templated functions when needed. 338 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 339 LateTemplateParserCB *LateTemplateParser; 340 void *OpaqueParser; 341 342 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 343 LateTemplateParser = LTP; 344 OpaqueParser = P; 345 } 346 347 class DelayedDiagnostics; 348 349 class ParsingDeclState { 350 unsigned SavedStackSize; 351 friend class Sema::DelayedDiagnostics; 352 }; 353 354 class ProcessingContextState { 355 unsigned SavedParsingDepth; 356 unsigned SavedActiveStackBase; 357 friend class Sema::DelayedDiagnostics; 358 }; 359 360 /// A class which encapsulates the logic for delaying diagnostics 361 /// during parsing and other processing. 362 class DelayedDiagnostics { 363 /// \brief The stack of diagnostics that were delayed due to being 364 /// produced during the parsing of a declaration. 365 sema::DelayedDiagnostic *Stack; 366 367 /// \brief The number of objects on the delayed-diagnostics stack. 368 unsigned StackSize; 369 370 /// \brief The current capacity of the delayed-diagnostics stack. 371 unsigned StackCapacity; 372 373 /// \brief The index of the first "active" delayed diagnostic in 374 /// the stack. When parsing class definitions, we ignore active 375 /// delayed diagnostics from the surrounding context. 376 unsigned ActiveStackBase; 377 378 /// \brief The depth of the declarations we're currently parsing. 379 /// This gets saved and reset whenever we enter a class definition. 380 unsigned ParsingDepth; 381 382 public: 383 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 384 ActiveStackBase(0), ParsingDepth(0) {} 385 386 ~DelayedDiagnostics() { 387 delete[] reinterpret_cast<char*>(Stack); 388 } 389 390 /// Adds a delayed diagnostic. 391 void add(const sema::DelayedDiagnostic &diag); 392 393 /// Determines whether diagnostics should be delayed. 394 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 395 396 /// Observe that we've started parsing a declaration. Access and 397 /// deprecation diagnostics will be delayed; when the declaration 398 /// is completed, all active delayed diagnostics will be evaluated 399 /// in its context, and then active diagnostics stack will be 400 /// popped down to the saved depth. 401 ParsingDeclState pushParsingDecl() { 402 ParsingDepth++; 403 404 ParsingDeclState state; 405 state.SavedStackSize = StackSize; 406 return state; 407 } 408 409 /// Observe that we're completed parsing a declaration. 410 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 411 412 /// Observe that we've started processing a different context, the 413 /// contents of which are semantically separate from the 414 /// declarations it may lexically appear in. This sets aside the 415 /// current stack of active diagnostics and starts afresh. 416 ProcessingContextState pushContext() { 417 assert(StackSize >= ActiveStackBase); 418 419 ProcessingContextState state; 420 state.SavedParsingDepth = ParsingDepth; 421 state.SavedActiveStackBase = ActiveStackBase; 422 423 ActiveStackBase = StackSize; 424 ParsingDepth = 0; 425 426 return state; 427 } 428 429 /// Observe that we've stopped processing a context. This 430 /// restores the previous stack of active diagnostics. 431 void popContext(ProcessingContextState state) { 432 assert(ActiveStackBase == StackSize); 433 assert(ParsingDepth == 0); 434 ActiveStackBase = state.SavedActiveStackBase; 435 ParsingDepth = state.SavedParsingDepth; 436 } 437 } DelayedDiagnostics; 438 439 /// A RAII object to temporarily push a declaration context. 440 class ContextRAII { 441 private: 442 Sema &S; 443 DeclContext *SavedContext; 444 ProcessingContextState SavedContextState; 445 446 public: 447 ContextRAII(Sema &S, DeclContext *ContextToPush) 448 : S(S), SavedContext(S.CurContext), 449 SavedContextState(S.DelayedDiagnostics.pushContext()) 450 { 451 assert(ContextToPush && "pushing null context"); 452 S.CurContext = ContextToPush; 453 } 454 455 void pop() { 456 if (!SavedContext) return; 457 S.CurContext = SavedContext; 458 S.DelayedDiagnostics.popContext(SavedContextState); 459 SavedContext = 0; 460 } 461 462 ~ContextRAII() { 463 pop(); 464 } 465 }; 466 467 /// WeakUndeclaredIdentifiers - Identifiers contained in 468 /// #pragma weak before declared. rare. may alias another 469 /// identifier, declared or undeclared 470 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 471 472 /// \brief Load weak undeclared identifiers from the external source. 473 void LoadExternalWeakUndeclaredIdentifiers(); 474 475 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 476 /// #pragma weak during processing of other Decls. 477 /// I couldn't figure out a clean way to generate these in-line, so 478 /// we store them here and handle separately -- which is a hack. 479 /// It would be best to refactor this. 480 SmallVector<Decl*,2> WeakTopLevelDecl; 481 482 IdentifierResolver IdResolver; 483 484 /// Translation Unit Scope - useful to Objective-C actions that need 485 /// to lookup file scope declarations in the "ordinary" C decl namespace. 486 /// For example, user-defined classes, built-in "id" type, etc. 487 Scope *TUScope; 488 489 /// \brief The C++ "std" namespace, where the standard library resides. 490 LazyDeclPtr StdNamespace; 491 492 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 493 /// standard library. 494 LazyDeclPtr StdBadAlloc; 495 496 /// \brief The C++ "std::initializer_list" template, which is defined in 497 /// <initializer_list>. 498 ClassTemplateDecl *StdInitializerList; 499 500 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 501 RecordDecl *CXXTypeInfoDecl; 502 503 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 504 RecordDecl *MSVCGuidDecl; 505 506 /// A flag to remember whether the implicit forms of operator new and delete 507 /// have been declared. 508 bool GlobalNewDeleteDeclared; 509 510 511 /// A flag that is set when parsing a -dealloc method and no [super dealloc] 512 /// call was found yet. 513 bool ObjCShouldCallSuperDealloc; 514 /// A flag that is set when parsing a -finalize method and no [super finalize] 515 /// call was found yet. 516 bool ObjCShouldCallSuperFinalize; 517 518 /// \brief Describes how the expressions currently being parsed are 519 /// evaluated at run-time, if at all. 520 enum ExpressionEvaluationContext { 521 /// \brief The current expression and its subexpressions occur within an 522 /// unevaluated operand (C++11 [expr]p7), such as the subexpression of 523 /// \c sizeof, where the type of the expression may be significant but 524 /// no code will be generated to evaluate the value of the expression at 525 /// run time. 526 Unevaluated, 527 528 /// \brief The current context is "potentially evaluated" in C++11 terms, 529 /// but the expression is evaluated at compile-time (like the values of 530 /// cases in a switch statment). 531 ConstantEvaluated, 532 533 /// \brief The current expression is potentially evaluated at run time, 534 /// which means that code may be generated to evaluate the value of the 535 /// expression at run time. 536 PotentiallyEvaluated, 537 538 /// \brief The current expression is potentially evaluated, but any 539 /// declarations referenced inside that expression are only used if 540 /// in fact the current expression is used. 541 /// 542 /// This value is used when parsing default function arguments, for which 543 /// we would like to provide diagnostics (e.g., passing non-POD arguments 544 /// through varargs) but do not want to mark declarations as "referenced" 545 /// until the default argument is used. 546 PotentiallyEvaluatedIfUsed 547 }; 548 549 /// \brief Data structure used to record current or nested 550 /// expression evaluation contexts. 551 struct ExpressionEvaluationContextRecord { 552 /// \brief The expression evaluation context. 553 ExpressionEvaluationContext Context; 554 555 /// \brief Whether the enclosing context needed a cleanup. 556 bool ParentNeedsCleanups; 557 558 /// \brief The number of active cleanup objects when we entered 559 /// this expression evaluation context. 560 unsigned NumCleanupObjects; 561 562 llvm::SmallPtrSet<Expr*, 8> SavedMaybeODRUseExprs; 563 564 /// \brief The lambdas that are present within this context, if it 565 /// is indeed an unevaluated context. 566 llvm::SmallVector<LambdaExpr *, 2> Lambdas; 567 568 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 569 unsigned NumCleanupObjects, 570 bool ParentNeedsCleanups) 571 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups), 572 NumCleanupObjects(NumCleanupObjects) { } 573 }; 574 575 /// A stack of expression evaluation contexts. 576 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 577 578 /// SpecialMemberOverloadResult - The overloading result for a special member 579 /// function. 580 /// 581 /// This is basically a wrapper around PointerIntPair. The lowest bit of the 582 /// integer is used to determine whether we have a parameter qualification 583 /// match, the second-lowest is whether we had success in resolving the 584 /// overload to a unique non-deleted function. 585 /// 586 /// The ConstParamMatch bit represents whether, when looking up a copy 587 /// constructor or assignment operator, we found a potential copy 588 /// constructor/assignment operator whose first parameter is const-qualified. 589 /// This is used for determining parameter types of other objects and is 590 /// utterly meaningless on other types of special members. 591 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 592 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 593 public: 594 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 595 : FastFoldingSetNode(ID) 596 {} 597 598 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 599 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 600 601 bool hasSuccess() const { return Pair.getInt() & 0x1; } 602 void setSuccess(bool B) { 603 Pair.setInt(unsigned(B) | hasConstParamMatch() << 1); 604 } 605 606 bool hasConstParamMatch() const { return Pair.getInt() & 0x2; } 607 void setConstParamMatch(bool B) { 608 Pair.setInt(B << 1 | unsigned(hasSuccess())); 609 } 610 }; 611 612 /// \brief A cache of special member function overload resolution results 613 /// for C++ records. 614 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 615 616 /// \brief The kind of translation unit we are processing. 617 /// 618 /// When we're processing a complete translation unit, Sema will perform 619 /// end-of-translation-unit semantic tasks (such as creating 620 /// initializers for tentative definitions in C) once parsing has 621 /// completed. Modules and precompiled headers perform different kinds of 622 /// checks. 623 TranslationUnitKind TUKind; 624 625 llvm::BumpPtrAllocator BumpAlloc; 626 627 /// \brief The number of SFINAE diagnostics that have been trapped. 628 unsigned NumSFINAEErrors; 629 630 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> > 631 UnparsedDefaultArgInstantiationsMap; 632 633 /// \brief A mapping from parameters with unparsed default arguments to the 634 /// set of instantiations of each parameter. 635 /// 636 /// This mapping is a temporary data structure used when parsing 637 /// nested class templates or nested classes of class templates, 638 /// where we might end up instantiating an inner class before the 639 /// default arguments of its methods have been parsed. 640 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 641 642 // Contains the locations of the beginning of unparsed default 643 // argument locations. 644 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 645 646 /// UndefinedInternals - all the used, undefined objects with 647 /// internal linkage in this translation unit. 648 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 649 650 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 651 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 652 653 /// Method Pool - allows efficient lookup when typechecking messages to "id". 654 /// We need to maintain a list, since selectors can have differing signatures 655 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 656 /// of selectors are "overloaded"). 657 GlobalMethodPool MethodPool; 658 659 /// Method selectors used in a @selector expression. Used for implementation 660 /// of -Wselector. 661 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 662 663 void ReadMethodPool(Selector Sel); 664 665 /// Private Helper predicate to check for 'self'. 666 bool isSelfExpr(Expr *RExpr); 667public: 668 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 669 TranslationUnitKind TUKind = TU_Complete, 670 CodeCompleteConsumer *CompletionConsumer = 0); 671 ~Sema(); 672 673 /// \brief Perform initialization that occurs after the parser has been 674 /// initialized but before it parses anything. 675 void Initialize(); 676 677 const LangOptions &getLangOptions() const { return LangOpts; } 678 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 679 FPOptions &getFPOptions() { return FPFeatures; } 680 681 DiagnosticsEngine &getDiagnostics() const { return Diags; } 682 SourceManager &getSourceManager() const { return SourceMgr; } 683 const TargetAttributesSema &getTargetAttributesSema() const; 684 Preprocessor &getPreprocessor() const { return PP; } 685 ASTContext &getASTContext() const { return Context; } 686 ASTConsumer &getASTConsumer() const { return Consumer; } 687 ASTMutationListener *getASTMutationListener() const; 688 689 void PrintStats() const; 690 691 /// \brief Helper class that creates diagnostics with optional 692 /// template instantiation stacks. 693 /// 694 /// This class provides a wrapper around the basic DiagnosticBuilder 695 /// class that emits diagnostics. SemaDiagnosticBuilder is 696 /// responsible for emitting the diagnostic (as DiagnosticBuilder 697 /// does) and, if the diagnostic comes from inside a template 698 /// instantiation, printing the template instantiation stack as 699 /// well. 700 class SemaDiagnosticBuilder : public DiagnosticBuilder { 701 Sema &SemaRef; 702 unsigned DiagID; 703 704 public: 705 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 706 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 707 708 explicit SemaDiagnosticBuilder(Sema &SemaRef) 709 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 710 711 ~SemaDiagnosticBuilder(); 712 }; 713 714 /// \brief Emit a diagnostic. 715 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 716 717 /// \brief Emit a partial diagnostic. 718 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 719 720 /// \brief Build a partial diagnostic. 721 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 722 723 bool findMacroSpelling(SourceLocation &loc, StringRef name); 724 725 /// \brief Get a string to suggest for zero-initialization of a type. 726 const char *getFixItZeroInitializerForType(QualType T) const; 727 728 ExprResult Owned(Expr* E) { return E; } 729 ExprResult Owned(ExprResult R) { return R; } 730 StmtResult Owned(Stmt* S) { return S; } 731 732 void ActOnEndOfTranslationUnit(); 733 734 void CheckDelegatingCtorCycles(); 735 736 Scope *getScopeForContext(DeclContext *Ctx); 737 738 void PushFunctionScope(); 739 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 740 void PushLambdaScope(CXXRecordDecl *Lambda, CXXMethodDecl *CallOperator); 741 void PopFunctionScopeInfo(const sema::AnalysisBasedWarnings::Policy *WP =0, 742 const Decl *D = 0, const BlockExpr *blkExpr = 0); 743 744 sema::FunctionScopeInfo *getCurFunction() const { 745 return FunctionScopes.back(); 746 } 747 748 void PushCompoundScope(); 749 void PopCompoundScope(); 750 751 sema::CompoundScopeInfo &getCurCompoundScope() const; 752 753 bool hasAnyUnrecoverableErrorsInThisFunction() const; 754 755 /// \brief Retrieve the current block, if any. 756 sema::BlockScopeInfo *getCurBlock(); 757 758 /// \brief Retrieve the current lambda expression, if any. 759 sema::LambdaScopeInfo *getCurLambda(); 760 761 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 762 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 763 764 //===--------------------------------------------------------------------===// 765 // Type Analysis / Processing: SemaType.cpp. 766 // 767 768 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 769 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 770 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 771 } 772 QualType BuildPointerType(QualType T, 773 SourceLocation Loc, DeclarationName Entity); 774 QualType BuildReferenceType(QualType T, bool LValueRef, 775 SourceLocation Loc, DeclarationName Entity); 776 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 777 Expr *ArraySize, unsigned Quals, 778 SourceRange Brackets, DeclarationName Entity); 779 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 780 SourceLocation AttrLoc); 781 QualType BuildFunctionType(QualType T, 782 QualType *ParamTypes, unsigned NumParamTypes, 783 bool Variadic, bool HasTrailingReturn, 784 unsigned Quals, RefQualifierKind RefQualifier, 785 SourceLocation Loc, DeclarationName Entity, 786 FunctionType::ExtInfo Info); 787 QualType BuildMemberPointerType(QualType T, QualType Class, 788 SourceLocation Loc, 789 DeclarationName Entity); 790 QualType BuildBlockPointerType(QualType T, 791 SourceLocation Loc, DeclarationName Entity); 792 QualType BuildParenType(QualType T); 793 QualType BuildAtomicType(QualType T, SourceLocation Loc); 794 795 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); 796 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); 797 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 798 TypeSourceInfo *ReturnTypeInfo); 799 /// \brief Package the given type and TSI into a ParsedType. 800 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 801 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 802 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 803 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 804 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 805 bool CheckDistantExceptionSpec(QualType T); 806 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 807 bool CheckEquivalentExceptionSpec( 808 const FunctionProtoType *Old, SourceLocation OldLoc, 809 const FunctionProtoType *New, SourceLocation NewLoc); 810 bool CheckEquivalentExceptionSpec( 811 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 812 const FunctionProtoType *Old, SourceLocation OldLoc, 813 const FunctionProtoType *New, SourceLocation NewLoc, 814 bool *MissingExceptionSpecification = 0, 815 bool *MissingEmptyExceptionSpecification = 0, 816 bool AllowNoexceptAllMatchWithNoSpec = false, 817 bool IsOperatorNew = false); 818 bool CheckExceptionSpecSubset( 819 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 820 const FunctionProtoType *Superset, SourceLocation SuperLoc, 821 const FunctionProtoType *Subset, SourceLocation SubLoc); 822 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 823 const FunctionProtoType *Target, SourceLocation TargetLoc, 824 const FunctionProtoType *Source, SourceLocation SourceLoc); 825 826 TypeResult ActOnTypeName(Scope *S, Declarator &D); 827 828 /// \brief The parser has parsed the context-sensitive type 'instancetype' 829 /// in an Objective-C message declaration. Return the appropriate type. 830 ParsedType ActOnObjCInstanceType(SourceLocation Loc); 831 832 bool RequireCompleteType(SourceLocation Loc, QualType T, 833 const PartialDiagnostic &PD, 834 std::pair<SourceLocation, PartialDiagnostic> Note); 835 bool RequireCompleteType(SourceLocation Loc, QualType T, 836 const PartialDiagnostic &PD); 837 bool RequireCompleteType(SourceLocation Loc, QualType T, 838 unsigned DiagID); 839 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 840 std::pair<SourceLocation, 841 PartialDiagnostic> Note); 842 843 bool RequireLiteralType(SourceLocation Loc, QualType T, 844 const PartialDiagnostic &PD); 845 846 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 847 const CXXScopeSpec &SS, QualType T); 848 849 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 850 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 851 QualType BuildUnaryTransformType(QualType BaseType, 852 UnaryTransformType::UTTKind UKind, 853 SourceLocation Loc); 854 855 //===--------------------------------------------------------------------===// 856 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 857 // 858 859 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 860 861 void DiagnoseUseOfUnimplementedSelectors(); 862 863 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 864 Scope *S, CXXScopeSpec *SS = 0, 865 bool isClassName = false, 866 bool HasTrailingDot = false, 867 ParsedType ObjectType = ParsedType(), 868 bool IsCtorOrDtorName = false, 869 bool WantNontrivialTypeSourceInfo = false, 870 IdentifierInfo **CorrectedII = 0); 871 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 872 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS, Scope *S); 873 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 874 SourceLocation IILoc, 875 Scope *S, 876 CXXScopeSpec *SS, 877 ParsedType &SuggestedType); 878 879 /// \brief Describes the result of the name lookup and resolution performed 880 /// by \c ClassifyName(). 881 enum NameClassificationKind { 882 NC_Unknown, 883 NC_Error, 884 NC_Keyword, 885 NC_Type, 886 NC_Expression, 887 NC_NestedNameSpecifier, 888 NC_TypeTemplate, 889 NC_FunctionTemplate 890 }; 891 892 class NameClassification { 893 NameClassificationKind Kind; 894 ExprResult Expr; 895 TemplateName Template; 896 ParsedType Type; 897 const IdentifierInfo *Keyword; 898 899 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 900 901 public: 902 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 903 904 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 905 906 NameClassification(const IdentifierInfo *Keyword) 907 : Kind(NC_Keyword), Keyword(Keyword) { } 908 909 static NameClassification Error() { 910 return NameClassification(NC_Error); 911 } 912 913 static NameClassification Unknown() { 914 return NameClassification(NC_Unknown); 915 } 916 917 static NameClassification NestedNameSpecifier() { 918 return NameClassification(NC_NestedNameSpecifier); 919 } 920 921 static NameClassification TypeTemplate(TemplateName Name) { 922 NameClassification Result(NC_TypeTemplate); 923 Result.Template = Name; 924 return Result; 925 } 926 927 static NameClassification FunctionTemplate(TemplateName Name) { 928 NameClassification Result(NC_FunctionTemplate); 929 Result.Template = Name; 930 return Result; 931 } 932 933 NameClassificationKind getKind() const { return Kind; } 934 935 ParsedType getType() const { 936 assert(Kind == NC_Type); 937 return Type; 938 } 939 940 ExprResult getExpression() const { 941 assert(Kind == NC_Expression); 942 return Expr; 943 } 944 945 TemplateName getTemplateName() const { 946 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 947 return Template; 948 } 949 950 TemplateNameKind getTemplateNameKind() const { 951 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 952 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 953 } 954}; 955 956 /// \brief Perform name lookup on the given name, classifying it based on 957 /// the results of name lookup and the following token. 958 /// 959 /// This routine is used by the parser to resolve identifiers and help direct 960 /// parsing. When the identifier cannot be found, this routine will attempt 961 /// to correct the typo and classify based on the resulting name. 962 /// 963 /// \param S The scope in which we're performing name lookup. 964 /// 965 /// \param SS The nested-name-specifier that precedes the name. 966 /// 967 /// \param Name The identifier. If typo correction finds an alternative name, 968 /// this pointer parameter will be updated accordingly. 969 /// 970 /// \param NameLoc The location of the identifier. 971 /// 972 /// \param NextToken The token following the identifier. Used to help 973 /// disambiguate the name. 974 NameClassification ClassifyName(Scope *S, 975 CXXScopeSpec &SS, 976 IdentifierInfo *&Name, 977 SourceLocation NameLoc, 978 const Token &NextToken); 979 980 Decl *ActOnDeclarator(Scope *S, Declarator &D); 981 982 Decl *HandleDeclarator(Scope *S, Declarator &D, 983 MultiTemplateParamsArg TemplateParameterLists); 984 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 985 const LookupResult &Previous, 986 Scope *S); 987 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 988 void DiagnoseFunctionSpecifiers(Declarator& D); 989 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 990 void CheckShadow(Scope *S, VarDecl *D); 991 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 992 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 993 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 994 TypeSourceInfo *TInfo, 995 LookupResult &Previous); 996 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 997 LookupResult &Previous, bool &Redeclaration); 998 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 999 TypeSourceInfo *TInfo, 1000 LookupResult &Previous, 1001 MultiTemplateParamsArg TemplateParamLists); 1002 // Returns true if the variable declaration is a redeclaration 1003 bool CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous); 1004 void CheckCompleteVariableDeclaration(VarDecl *var); 1005 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1006 TypeSourceInfo *TInfo, 1007 LookupResult &Previous, 1008 MultiTemplateParamsArg TemplateParamLists, 1009 bool &AddToScope); 1010 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1011 1012 bool CheckConstexprFunctionDecl(const FunctionDecl *FD); 1013 bool CheckConstexprFunctionBody(const FunctionDecl *FD, Stmt *Body); 1014 1015 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1016 // Returns true if the function declaration is a redeclaration 1017 bool CheckFunctionDeclaration(Scope *S, 1018 FunctionDecl *NewFD, LookupResult &Previous, 1019 bool IsExplicitSpecialization); 1020 void CheckMain(FunctionDecl *FD, const DeclSpec &D); 1021 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1022 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1023 SourceLocation Loc, 1024 QualType T); 1025 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1026 SourceLocation NameLoc, IdentifierInfo *Name, 1027 QualType T, TypeSourceInfo *TSInfo, 1028 StorageClass SC, StorageClass SCAsWritten); 1029 void ActOnParamDefaultArgument(Decl *param, 1030 SourceLocation EqualLoc, 1031 Expr *defarg); 1032 void ActOnParamUnparsedDefaultArgument(Decl *param, 1033 SourceLocation EqualLoc, 1034 SourceLocation ArgLoc); 1035 void ActOnParamDefaultArgumentError(Decl *param); 1036 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1037 SourceLocation EqualLoc); 1038 1039 void CheckSelfReference(Decl *OrigDecl, Expr *E); 1040 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1041 bool TypeMayContainAuto); 1042 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1043 void ActOnInitializerError(Decl *Dcl); 1044 void ActOnCXXForRangeDecl(Decl *D); 1045 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1046 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1047 void FinalizeDeclaration(Decl *D); 1048 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1049 Decl **Group, 1050 unsigned NumDecls); 1051 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1052 bool TypeMayContainAuto = true); 1053 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1054 SourceLocation LocAfterDecls); 1055 void CheckForFunctionRedefinition(FunctionDecl *FD); 1056 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1057 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1058 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1059 1060 void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope); 1061 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1062 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1063 1064 /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an 1065 /// attribute for which parsing is delayed. 1066 void ActOnFinishDelayedAttribute(Scope *S, Decl *D, ParsedAttributes &Attrs); 1067 1068 /// \brief Diagnose any unused parameters in the given sequence of 1069 /// ParmVarDecl pointers. 1070 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1071 ParmVarDecl * const *End); 1072 1073 /// \brief Diagnose whether the size of parameters or return value of a 1074 /// function or obj-c method definition is pass-by-value and larger than a 1075 /// specified threshold. 1076 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1077 ParmVarDecl * const *End, 1078 QualType ReturnTy, 1079 NamedDecl *D); 1080 1081 void DiagnoseInvalidJumps(Stmt *Body); 1082 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1083 SourceLocation AsmLoc, 1084 SourceLocation RParenLoc); 1085 1086 /// \brief The parser has processed a module import declaration. 1087 /// 1088 /// \param AtLoc The location of the '@' symbol, if any. 1089 /// 1090 /// \param ImportLoc The location of the 'import' keyword. 1091 /// 1092 /// \param Path The module access path. 1093 DeclResult ActOnModuleImport(SourceLocation AtLoc, SourceLocation ImportLoc, 1094 ModuleIdPath Path); 1095 1096 /// \brief Retrieve a suitable printing policy. 1097 PrintingPolicy getPrintingPolicy() const { 1098 return getPrintingPolicy(Context, PP); 1099 } 1100 1101 /// \brief Retrieve a suitable printing policy. 1102 static PrintingPolicy getPrintingPolicy(const ASTContext &Ctx, 1103 const Preprocessor &PP); 1104 1105 /// Scope actions. 1106 void ActOnPopScope(SourceLocation Loc, Scope *S); 1107 void ActOnTranslationUnitScope(Scope *S); 1108 1109 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1110 DeclSpec &DS); 1111 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1112 DeclSpec &DS, 1113 MultiTemplateParamsArg TemplateParams); 1114 1115 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1116 AccessSpecifier AS, 1117 RecordDecl *Record); 1118 1119 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1120 RecordDecl *Record); 1121 1122 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1123 TagTypeKind NewTag, bool isDefinition, 1124 SourceLocation NewTagLoc, 1125 const IdentifierInfo &Name); 1126 1127 enum TagUseKind { 1128 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1129 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1130 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1131 TUK_Friend // Friend declaration: 'friend struct foo;' 1132 }; 1133 1134 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1135 SourceLocation KWLoc, CXXScopeSpec &SS, 1136 IdentifierInfo *Name, SourceLocation NameLoc, 1137 AttributeList *Attr, AccessSpecifier AS, 1138 SourceLocation ModulePrivateLoc, 1139 MultiTemplateParamsArg TemplateParameterLists, 1140 bool &OwnedDecl, bool &IsDependent, 1141 SourceLocation ScopedEnumKWLoc, 1142 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1143 1144 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1145 unsigned TagSpec, SourceLocation TagLoc, 1146 CXXScopeSpec &SS, 1147 IdentifierInfo *Name, SourceLocation NameLoc, 1148 AttributeList *Attr, 1149 MultiTemplateParamsArg TempParamLists); 1150 1151 TypeResult ActOnDependentTag(Scope *S, 1152 unsigned TagSpec, 1153 TagUseKind TUK, 1154 const CXXScopeSpec &SS, 1155 IdentifierInfo *Name, 1156 SourceLocation TagLoc, 1157 SourceLocation NameLoc); 1158 1159 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1160 IdentifierInfo *ClassName, 1161 SmallVectorImpl<Decl *> &Decls); 1162 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1163 Declarator &D, Expr *BitfieldWidth); 1164 1165 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1166 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1167 AccessSpecifier AS); 1168 1169 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1170 TypeSourceInfo *TInfo, 1171 RecordDecl *Record, SourceLocation Loc, 1172 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1173 SourceLocation TSSL, 1174 AccessSpecifier AS, NamedDecl *PrevDecl, 1175 Declarator *D = 0); 1176 1177 enum CXXSpecialMember { 1178 CXXDefaultConstructor, 1179 CXXCopyConstructor, 1180 CXXMoveConstructor, 1181 CXXCopyAssignment, 1182 CXXMoveAssignment, 1183 CXXDestructor, 1184 CXXInvalid 1185 }; 1186 bool CheckNontrivialField(FieldDecl *FD); 1187 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1188 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1189 void ActOnLastBitfield(SourceLocation DeclStart, 1190 SmallVectorImpl<Decl *> &AllIvarDecls); 1191 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, 1192 Declarator &D, Expr *BitfieldWidth, 1193 tok::ObjCKeywordKind visibility); 1194 1195 // This is used for both record definitions and ObjC interface declarations. 1196 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1197 llvm::ArrayRef<Decl *> Fields, 1198 SourceLocation LBrac, SourceLocation RBrac, 1199 AttributeList *AttrList); 1200 1201 /// ActOnTagStartDefinition - Invoked when we have entered the 1202 /// scope of a tag's definition (e.g., for an enumeration, class, 1203 /// struct, or union). 1204 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1205 1206 Decl *ActOnObjCContainerStartDefinition(Decl *IDecl); 1207 1208 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1209 /// C++ record definition's base-specifiers clause and are starting its 1210 /// member declarations. 1211 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1212 SourceLocation FinalLoc, 1213 SourceLocation LBraceLoc); 1214 1215 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1216 /// the definition of a tag (enumeration, class, struct, or union). 1217 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1218 SourceLocation RBraceLoc); 1219 1220 void ActOnObjCContainerFinishDefinition(); 1221 1222 /// \brief Invoked when we must temporarily exit the objective-c container 1223 /// scope for parsing/looking-up C constructs. 1224 /// 1225 /// Must be followed by a call to \see ActOnObjCReenterContainerContext 1226 void ActOnObjCTemporaryExitContainerContext(DeclContext *DC); 1227 void ActOnObjCReenterContainerContext(DeclContext *DC); 1228 1229 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1230 /// error parsing the definition of a tag. 1231 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1232 1233 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1234 EnumConstantDecl *LastEnumConst, 1235 SourceLocation IdLoc, 1236 IdentifierInfo *Id, 1237 Expr *val); 1238 1239 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1240 SourceLocation IdLoc, IdentifierInfo *Id, 1241 AttributeList *Attrs, 1242 SourceLocation EqualLoc, Expr *Val); 1243 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1244 SourceLocation RBraceLoc, Decl *EnumDecl, 1245 Decl **Elements, unsigned NumElements, 1246 Scope *S, AttributeList *Attr); 1247 1248 DeclContext *getContainingDC(DeclContext *DC); 1249 1250 /// Set the current declaration context until it gets popped. 1251 void PushDeclContext(Scope *S, DeclContext *DC); 1252 void PopDeclContext(); 1253 1254 /// EnterDeclaratorContext - Used when we must lookup names in the context 1255 /// of a declarator's nested name specifier. 1256 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1257 void ExitDeclaratorContext(Scope *S); 1258 1259 /// Push the parameters of D, which must be a function, into scope. 1260 void ActOnReenterFunctionContext(Scope* S, Decl* D); 1261 void ActOnExitFunctionContext() { PopDeclContext(); } 1262 1263 DeclContext *getFunctionLevelDeclContext(); 1264 1265 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1266 /// to the function decl for the function being parsed. If we're currently 1267 /// in a 'block', this returns the containing context. 1268 FunctionDecl *getCurFunctionDecl(); 1269 1270 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1271 /// the method decl for the method being parsed. If we're currently 1272 /// in a 'block', this returns the containing context. 1273 ObjCMethodDecl *getCurMethodDecl(); 1274 1275 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1276 /// or C function we're in, otherwise return null. If we're currently 1277 /// in a 'block', this returns the containing context. 1278 NamedDecl *getCurFunctionOrMethodDecl(); 1279 1280 /// Add this decl to the scope shadowed decl chains. 1281 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1282 1283 /// \brief Make the given externally-produced declaration visible at the 1284 /// top level scope. 1285 /// 1286 /// \param D The externally-produced declaration to push. 1287 /// 1288 /// \param Name The name of the externally-produced declaration. 1289 void pushExternalDeclIntoScope(NamedDecl *D, DeclarationName Name); 1290 1291 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1292 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1293 /// true if 'D' belongs to the given declaration context. 1294 /// 1295 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1296 /// whether the declaration is in scope for the purposes of explicit template 1297 /// instantiation or specialization. The default is false. 1298 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1299 bool ExplicitInstantiationOrSpecialization = false); 1300 1301 /// Finds the scope corresponding to the given decl context, if it 1302 /// happens to be an enclosing scope. Otherwise return NULL. 1303 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1304 1305 /// Subroutines of ActOnDeclarator(). 1306 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1307 TypeSourceInfo *TInfo); 1308 bool isIncompatibleTypedef(TypeDecl *Old, TypedefNameDecl *New); 1309 void mergeDeclAttributes(Decl *New, Decl *Old, bool MergeDeprecation = true); 1310 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1311 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1312 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1313 void mergeObjCMethodDecls(ObjCMethodDecl *New, ObjCMethodDecl *Old); 1314 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1315 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1316 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1317 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1318 1319 // AssignmentAction - This is used by all the assignment diagnostic functions 1320 // to represent what is actually causing the operation 1321 enum AssignmentAction { 1322 AA_Assigning, 1323 AA_Passing, 1324 AA_Returning, 1325 AA_Converting, 1326 AA_Initializing, 1327 AA_Sending, 1328 AA_Casting 1329 }; 1330 1331 /// C++ Overloading. 1332 enum OverloadKind { 1333 /// This is a legitimate overload: the existing declarations are 1334 /// functions or function templates with different signatures. 1335 Ovl_Overload, 1336 1337 /// This is not an overload because the signature exactly matches 1338 /// an existing declaration. 1339 Ovl_Match, 1340 1341 /// This is not an overload because the lookup results contain a 1342 /// non-function. 1343 Ovl_NonFunction 1344 }; 1345 OverloadKind CheckOverload(Scope *S, 1346 FunctionDecl *New, 1347 const LookupResult &OldDecls, 1348 NamedDecl *&OldDecl, 1349 bool IsForUsingDecl); 1350 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1351 1352 /// \brief Checks availability of the function depending on the current 1353 /// function context.Inside an unavailable function,unavailability is ignored. 1354 /// 1355 /// \returns true if \arg FD is unavailable and current context is inside 1356 /// an available function, false otherwise. 1357 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1358 1359 ImplicitConversionSequence 1360 TryImplicitConversion(Expr *From, QualType ToType, 1361 bool SuppressUserConversions, 1362 bool AllowExplicit, 1363 bool InOverloadResolution, 1364 bool CStyle, 1365 bool AllowObjCWritebackConversion); 1366 1367 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1368 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1369 bool IsComplexPromotion(QualType FromType, QualType ToType); 1370 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1371 bool InOverloadResolution, 1372 QualType& ConvertedType, bool &IncompatibleObjC); 1373 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1374 QualType& ConvertedType, bool &IncompatibleObjC); 1375 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1376 QualType &ConvertedType); 1377 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1378 QualType& ConvertedType); 1379 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1380 const FunctionProtoType *NewType, 1381 unsigned *ArgPos = 0); 1382 void HandleFunctionTypeMismatch(PartialDiagnostic &PDiag, 1383 QualType FromType, QualType ToType); 1384 1385 CastKind PrepareCastToObjCObjectPointer(ExprResult &E); 1386 bool CheckPointerConversion(Expr *From, QualType ToType, 1387 CastKind &Kind, 1388 CXXCastPath& BasePath, 1389 bool IgnoreBaseAccess); 1390 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1391 bool InOverloadResolution, 1392 QualType &ConvertedType); 1393 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1394 CastKind &Kind, 1395 CXXCastPath &BasePath, 1396 bool IgnoreBaseAccess); 1397 bool IsQualificationConversion(QualType FromType, QualType ToType, 1398 bool CStyle, bool &ObjCLifetimeConversion); 1399 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1400 QualType &ResultTy); 1401 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1402 1403 1404 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1405 const VarDecl *NRVOCandidate, 1406 QualType ResultType, 1407 Expr *Value, 1408 bool AllowNRVO = true); 1409 1410 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1411 ExprResult Init); 1412 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1413 SourceLocation EqualLoc, 1414 ExprResult Init, 1415 bool TopLevelOfInitList = false); 1416 ExprResult PerformObjectArgumentInitialization(Expr *From, 1417 NestedNameSpecifier *Qualifier, 1418 NamedDecl *FoundDecl, 1419 CXXMethodDecl *Method); 1420 1421 ExprResult PerformContextuallyConvertToBool(Expr *From); 1422 ExprResult PerformContextuallyConvertToObjCPointer(Expr *From); 1423 1424 /// Contexts in which a converted constant expression is required. 1425 enum CCEKind { 1426 CCEK_CaseValue, ///< Expression in a case label. 1427 CCEK_Enumerator, ///< Enumerator value with fixed underlying type. 1428 CCEK_TemplateArg ///< Value of a non-type template parameter. 1429 }; 1430 ExprResult CheckConvertedConstantExpression(Expr *From, QualType T, 1431 llvm::APSInt &Value, CCEKind CCE); 1432 1433 ExprResult 1434 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1435 const PartialDiagnostic &NotIntDiag, 1436 const PartialDiagnostic &IncompleteDiag, 1437 const PartialDiagnostic &ExplicitConvDiag, 1438 const PartialDiagnostic &ExplicitConvNote, 1439 const PartialDiagnostic &AmbigDiag, 1440 const PartialDiagnostic &AmbigNote, 1441 const PartialDiagnostic &ConvDiag, 1442 bool AllowScopedEnumerations); 1443 1444 ExprResult PerformObjectMemberConversion(Expr *From, 1445 NestedNameSpecifier *Qualifier, 1446 NamedDecl *FoundDecl, 1447 NamedDecl *Member); 1448 1449 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1450 // TODO: make this is a typesafe union. 1451 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1452 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1453 1454 void AddOverloadCandidate(FunctionDecl *Function, 1455 DeclAccessPair FoundDecl, 1456 Expr **Args, unsigned NumArgs, 1457 OverloadCandidateSet& CandidateSet, 1458 bool SuppressUserConversions = false, 1459 bool PartialOverloading = false); 1460 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1461 Expr **Args, unsigned NumArgs, 1462 OverloadCandidateSet& CandidateSet, 1463 bool SuppressUserConversions = false); 1464 void AddMethodCandidate(DeclAccessPair FoundDecl, 1465 QualType ObjectType, 1466 Expr::Classification ObjectClassification, 1467 Expr **Args, unsigned NumArgs, 1468 OverloadCandidateSet& CandidateSet, 1469 bool SuppressUserConversion = false); 1470 void AddMethodCandidate(CXXMethodDecl *Method, 1471 DeclAccessPair FoundDecl, 1472 CXXRecordDecl *ActingContext, QualType ObjectType, 1473 Expr::Classification ObjectClassification, 1474 Expr **Args, unsigned NumArgs, 1475 OverloadCandidateSet& CandidateSet, 1476 bool SuppressUserConversions = false); 1477 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1478 DeclAccessPair FoundDecl, 1479 CXXRecordDecl *ActingContext, 1480 TemplateArgumentListInfo *ExplicitTemplateArgs, 1481 QualType ObjectType, 1482 Expr::Classification ObjectClassification, 1483 Expr **Args, unsigned NumArgs, 1484 OverloadCandidateSet& CandidateSet, 1485 bool SuppressUserConversions = false); 1486 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1487 DeclAccessPair FoundDecl, 1488 TemplateArgumentListInfo *ExplicitTemplateArgs, 1489 Expr **Args, unsigned NumArgs, 1490 OverloadCandidateSet& CandidateSet, 1491 bool SuppressUserConversions = false); 1492 void AddConversionCandidate(CXXConversionDecl *Conversion, 1493 DeclAccessPair FoundDecl, 1494 CXXRecordDecl *ActingContext, 1495 Expr *From, QualType ToType, 1496 OverloadCandidateSet& CandidateSet); 1497 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1498 DeclAccessPair FoundDecl, 1499 CXXRecordDecl *ActingContext, 1500 Expr *From, QualType ToType, 1501 OverloadCandidateSet &CandidateSet); 1502 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1503 DeclAccessPair FoundDecl, 1504 CXXRecordDecl *ActingContext, 1505 const FunctionProtoType *Proto, 1506 Expr *Object, Expr **Args, unsigned NumArgs, 1507 OverloadCandidateSet& CandidateSet); 1508 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1509 SourceLocation OpLoc, 1510 Expr **Args, unsigned NumArgs, 1511 OverloadCandidateSet& CandidateSet, 1512 SourceRange OpRange = SourceRange()); 1513 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1514 Expr **Args, unsigned NumArgs, 1515 OverloadCandidateSet& CandidateSet, 1516 bool IsAssignmentOperator = false, 1517 unsigned NumContextualBoolArguments = 0); 1518 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1519 SourceLocation OpLoc, 1520 Expr **Args, unsigned NumArgs, 1521 OverloadCandidateSet& CandidateSet); 1522 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1523 bool Operator, 1524 Expr **Args, unsigned NumArgs, 1525 TemplateArgumentListInfo *ExplicitTemplateArgs, 1526 OverloadCandidateSet& CandidateSet, 1527 bool PartialOverloading = false, 1528 bool StdNamespaceIsAssociated = false); 1529 1530 // Emit as a 'note' the specific overload candidate 1531 void NoteOverloadCandidate(FunctionDecl *Fn, QualType DestType = QualType()); 1532 1533 // Emit as a series of 'note's all template and non-templates 1534 // identified by the expression Expr 1535 void NoteAllOverloadCandidates(Expr* E, QualType DestType = QualType()); 1536 1537 // [PossiblyAFunctionType] --> [Return] 1538 // NonFunctionType --> NonFunctionType 1539 // R (A) --> R(A) 1540 // R (*)(A) --> R (A) 1541 // R (&)(A) --> R (A) 1542 // R (S::*)(A) --> R (A) 1543 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1544 1545 FunctionDecl * 1546 ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, 1547 QualType TargetType, 1548 bool Complain, 1549 DeclAccessPair &Found, 1550 bool *pHadMultipleCandidates = 0); 1551 1552 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1553 bool Complain = false, 1554 DeclAccessPair* Found = 0); 1555 1556 bool ResolveAndFixSingleFunctionTemplateSpecialization( 1557 ExprResult &SrcExpr, 1558 bool DoFunctionPointerConverion = false, 1559 bool Complain = false, 1560 const SourceRange& OpRangeForComplaining = SourceRange(), 1561 QualType DestTypeForComplaining = QualType(), 1562 unsigned DiagIDForComplaining = 0); 1563 1564 1565 Expr *FixOverloadedFunctionReference(Expr *E, 1566 DeclAccessPair FoundDecl, 1567 FunctionDecl *Fn); 1568 ExprResult FixOverloadedFunctionReference(ExprResult, 1569 DeclAccessPair FoundDecl, 1570 FunctionDecl *Fn); 1571 1572 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1573 Expr **Args, unsigned NumArgs, 1574 OverloadCandidateSet &CandidateSet, 1575 bool PartialOverloading = false); 1576 1577 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1578 UnresolvedLookupExpr *ULE, 1579 SourceLocation LParenLoc, 1580 Expr **Args, unsigned NumArgs, 1581 SourceLocation RParenLoc, 1582 Expr *ExecConfig, 1583 bool AllowTypoCorrection=true); 1584 1585 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1586 unsigned Opc, 1587 const UnresolvedSetImpl &Fns, 1588 Expr *input); 1589 1590 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1591 unsigned Opc, 1592 const UnresolvedSetImpl &Fns, 1593 Expr *LHS, Expr *RHS); 1594 1595 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1596 SourceLocation RLoc, 1597 Expr *Base,Expr *Idx); 1598 1599 ExprResult 1600 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1601 SourceLocation LParenLoc, Expr **Args, 1602 unsigned NumArgs, SourceLocation RParenLoc); 1603 ExprResult 1604 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1605 Expr **Args, unsigned NumArgs, 1606 SourceLocation RParenLoc); 1607 1608 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1609 SourceLocation OpLoc); 1610 1611 /// CheckCallReturnType - Checks that a call expression's return type is 1612 /// complete. Returns true on failure. The location passed in is the location 1613 /// that best represents the call. 1614 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1615 CallExpr *CE, FunctionDecl *FD); 1616 1617 /// Helpers for dealing with blocks and functions. 1618 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1619 bool CheckParameterNames); 1620 void CheckCXXDefaultArguments(FunctionDecl *FD); 1621 void CheckExtraCXXDefaultArguments(Declarator &D); 1622 Scope *getNonFieldDeclScope(Scope *S); 1623 1624 /// \name Name lookup 1625 /// 1626 /// These routines provide name lookup that is used during semantic 1627 /// analysis to resolve the various kinds of names (identifiers, 1628 /// overloaded operator names, constructor names, etc.) into zero or 1629 /// more declarations within a particular scope. The major entry 1630 /// points are LookupName, which performs unqualified name lookup, 1631 /// and LookupQualifiedName, which performs qualified name lookup. 1632 /// 1633 /// All name lookup is performed based on some specific criteria, 1634 /// which specify what names will be visible to name lookup and how 1635 /// far name lookup should work. These criteria are important both 1636 /// for capturing language semantics (certain lookups will ignore 1637 /// certain names, for example) and for performance, since name 1638 /// lookup is often a bottleneck in the compilation of C++. Name 1639 /// lookup criteria is specified via the LookupCriteria enumeration. 1640 /// 1641 /// The results of name lookup can vary based on the kind of name 1642 /// lookup performed, the current language, and the translation 1643 /// unit. In C, for example, name lookup will either return nothing 1644 /// (no entity found) or a single declaration. In C++, name lookup 1645 /// can additionally refer to a set of overloaded functions or 1646 /// result in an ambiguity. All of the possible results of name 1647 /// lookup are captured by the LookupResult class, which provides 1648 /// the ability to distinguish among them. 1649 //@{ 1650 1651 /// @brief Describes the kind of name lookup to perform. 1652 enum LookupNameKind { 1653 /// Ordinary name lookup, which finds ordinary names (functions, 1654 /// variables, typedefs, etc.) in C and most kinds of names 1655 /// (functions, variables, members, types, etc.) in C++. 1656 LookupOrdinaryName = 0, 1657 /// Tag name lookup, which finds the names of enums, classes, 1658 /// structs, and unions. 1659 LookupTagName, 1660 /// Label name lookup. 1661 LookupLabel, 1662 /// Member name lookup, which finds the names of 1663 /// class/struct/union members. 1664 LookupMemberName, 1665 /// Look up of an operator name (e.g., operator+) for use with 1666 /// operator overloading. This lookup is similar to ordinary name 1667 /// lookup, but will ignore any declarations that are class members. 1668 LookupOperatorName, 1669 /// Look up of a name that precedes the '::' scope resolution 1670 /// operator in C++. This lookup completely ignores operator, object, 1671 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1672 LookupNestedNameSpecifierName, 1673 /// Look up a namespace name within a C++ using directive or 1674 /// namespace alias definition, ignoring non-namespace names (C++ 1675 /// [basic.lookup.udir]p1). 1676 LookupNamespaceName, 1677 /// Look up all declarations in a scope with the given name, 1678 /// including resolved using declarations. This is appropriate 1679 /// for checking redeclarations for a using declaration. 1680 LookupUsingDeclName, 1681 /// Look up an ordinary name that is going to be redeclared as a 1682 /// name with linkage. This lookup ignores any declarations that 1683 /// are outside of the current scope unless they have linkage. See 1684 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1685 LookupRedeclarationWithLinkage, 1686 /// Look up the name of an Objective-C protocol. 1687 LookupObjCProtocolName, 1688 /// Look up implicit 'self' parameter of an objective-c method. 1689 LookupObjCImplicitSelfParam, 1690 /// \brief Look up any declaration with any name. 1691 LookupAnyName 1692 }; 1693 1694 /// \brief Specifies whether (or how) name lookup is being performed for a 1695 /// redeclaration (vs. a reference). 1696 enum RedeclarationKind { 1697 /// \brief The lookup is a reference to this name that is not for the 1698 /// purpose of redeclaring the name. 1699 NotForRedeclaration = 0, 1700 /// \brief The lookup results will be used for redeclaration of a name, 1701 /// if an entity by that name already exists. 1702 ForRedeclaration 1703 }; 1704 1705private: 1706 bool CppLookupName(LookupResult &R, Scope *S); 1707 1708 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1709 CXXSpecialMember SM, 1710 bool ConstArg, 1711 bool VolatileArg, 1712 bool RValueThis, 1713 bool ConstThis, 1714 bool VolatileThis); 1715 1716 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1717 // 1718 // The boolean value will be true to indicate that the namespace was loaded 1719 // from an AST/PCH file, or false otherwise. 1720 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1721 1722 /// \brief Whether we have already loaded known namespaces from an extenal 1723 /// source. 1724 bool LoadedExternalKnownNamespaces; 1725 1726public: 1727 /// \brief Look up a name, looking for a single declaration. Return 1728 /// null if the results were absent, ambiguous, or overloaded. 1729 /// 1730 /// It is preferable to use the elaborated form and explicitly handle 1731 /// ambiguity and overloaded. 1732 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1733 SourceLocation Loc, 1734 LookupNameKind NameKind, 1735 RedeclarationKind Redecl 1736 = NotForRedeclaration); 1737 bool LookupName(LookupResult &R, Scope *S, 1738 bool AllowBuiltinCreation = false); 1739 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1740 bool InUnqualifiedLookup = false); 1741 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1742 bool AllowBuiltinCreation = false, 1743 bool EnteringContext = false); 1744 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc, 1745 RedeclarationKind Redecl 1746 = NotForRedeclaration); 1747 1748 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1749 QualType T1, QualType T2, 1750 UnresolvedSetImpl &Functions); 1751 1752 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1753 SourceLocation GnuLabelLoc = SourceLocation()); 1754 1755 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1756 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1757 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1758 unsigned Quals, 1759 bool *ConstParam = 0); 1760 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1761 bool RValueThis, unsigned ThisQuals, 1762 bool *ConstParam = 0); 1763 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class); 1764 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, bool RValueThis, 1765 unsigned ThisQuals); 1766 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1767 1768 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1769 Expr **Args, unsigned NumArgs, 1770 ADLResult &Functions, 1771 bool StdNamespaceIsAssociated = false); 1772 1773 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1774 VisibleDeclConsumer &Consumer, 1775 bool IncludeGlobalScope = true); 1776 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1777 VisibleDeclConsumer &Consumer, 1778 bool IncludeGlobalScope = true); 1779 1780 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1781 Sema::LookupNameKind LookupKind, 1782 Scope *S, CXXScopeSpec *SS, 1783 CorrectionCandidateCallback &CCC, 1784 DeclContext *MemberContext = 0, 1785 bool EnteringContext = false, 1786 const ObjCObjectPointerType *OPT = 0); 1787 1788 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1789 AssociatedNamespaceSet &AssociatedNamespaces, 1790 AssociatedClassSet &AssociatedClasses); 1791 1792 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1793 bool ConsiderLinkage, 1794 bool ExplicitInstantiationOrSpecialization); 1795 1796 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1797 //@} 1798 1799 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1800 SourceLocation IdLoc, 1801 bool TypoCorrection = false); 1802 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1803 Scope *S, bool ForRedeclaration, 1804 SourceLocation Loc); 1805 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1806 Scope *S); 1807 void AddKnownFunctionAttributes(FunctionDecl *FD); 1808 1809 // More parsing and symbol table subroutines. 1810 1811 // Decl attributes - this routine is the top level dispatcher. 1812 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1813 bool NonInheritable = true, bool Inheritable = true); 1814 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1815 bool NonInheritable = true, bool Inheritable = true); 1816 bool ProcessAccessDeclAttributeList(AccessSpecDecl *ASDecl, 1817 const AttributeList *AttrList); 1818 1819 void checkUnusedDeclAttributes(Declarator &D); 1820 1821 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1822 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1823 bool CheckNoReturnAttr(const AttributeList &attr); 1824 1825 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1826 bool &IncompleteImpl, unsigned DiagID); 1827 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 1828 ObjCMethodDecl *MethodDecl, 1829 bool IsProtocolMethodDecl); 1830 1831 void CheckConflictingOverridingMethod(ObjCMethodDecl *Method, 1832 ObjCMethodDecl *Overridden, 1833 bool IsProtocolMethodDecl); 1834 1835 /// WarnExactTypedMethods - This routine issues a warning if method 1836 /// implementation declaration matches exactly that of its declaration. 1837 void WarnExactTypedMethods(ObjCMethodDecl *Method, 1838 ObjCMethodDecl *MethodDecl, 1839 bool IsProtocolMethodDecl); 1840 1841 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1842 ObjCInterfaceDecl *IDecl); 1843 1844 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1845 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap; 1846 1847 /// CheckProtocolMethodDefs - This routine checks unimplemented 1848 /// methods declared in protocol, and those referenced by it. 1849 /// \param IDecl - Used for checking for methods which may have been 1850 /// inherited. 1851 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1852 ObjCProtocolDecl *PDecl, 1853 bool& IncompleteImpl, 1854 const SelectorSet &InsMap, 1855 const SelectorSet &ClsMap, 1856 ObjCContainerDecl *CDecl); 1857 1858 /// CheckImplementationIvars - This routine checks if the instance variables 1859 /// listed in the implelementation match those listed in the interface. 1860 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1861 ObjCIvarDecl **Fields, unsigned nIvars, 1862 SourceLocation Loc); 1863 1864 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1865 /// remains unimplemented in the class or category @implementation. 1866 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1867 ObjCContainerDecl* IDecl, 1868 bool IncompleteImpl = false); 1869 1870 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1871 /// which must be implemented by this implementation. 1872 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1873 ObjCContainerDecl *CDecl, 1874 const SelectorSet &InsMap); 1875 1876 /// DefaultSynthesizeProperties - This routine default synthesizes all 1877 /// properties which must be synthesized in class's @implementation. 1878 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1879 ObjCInterfaceDecl *IDecl); 1880 void DefaultSynthesizeProperties(Scope *S, Decl *D); 1881 1882 /// CollectImmediateProperties - This routine collects all properties in 1883 /// the class and its conforming protocols; but not those it its super class. 1884 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1885 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1886 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1887 1888 1889 /// LookupPropertyDecl - Looks up a property in the current class and all 1890 /// its protocols. 1891 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1892 IdentifierInfo *II); 1893 1894 /// Called by ActOnProperty to handle @property declarations in 1895 //// class extensions. 1896 Decl *HandlePropertyInClassExtension(Scope *S, 1897 SourceLocation AtLoc, 1898 FieldDeclarator &FD, 1899 Selector GetterSel, 1900 Selector SetterSel, 1901 const bool isAssign, 1902 const bool isReadWrite, 1903 const unsigned Attributes, 1904 const unsigned AttributesAsWritten, 1905 bool *isOverridingProperty, 1906 TypeSourceInfo *T, 1907 tok::ObjCKeywordKind MethodImplKind); 1908 1909 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1910 /// handle creating the ObjcPropertyDecl for a category or @interface. 1911 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1912 ObjCContainerDecl *CDecl, 1913 SourceLocation AtLoc, 1914 FieldDeclarator &FD, 1915 Selector GetterSel, 1916 Selector SetterSel, 1917 const bool isAssign, 1918 const bool isReadWrite, 1919 const unsigned Attributes, 1920 const unsigned AttributesAsWritten, 1921 TypeSourceInfo *T, 1922 tok::ObjCKeywordKind MethodImplKind, 1923 DeclContext *lexicalDC = 0); 1924 1925 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1926 /// warning) when atomic property has one but not the other user-declared 1927 /// setter or getter. 1928 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1929 ObjCContainerDecl* IDecl); 1930 1931 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 1932 1933 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1934 1935 enum MethodMatchStrategy { 1936 MMS_loose, 1937 MMS_strict 1938 }; 1939 1940 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1941 /// true, or false, accordingly. 1942 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1943 const ObjCMethodDecl *PrevMethod, 1944 MethodMatchStrategy strategy = MMS_strict); 1945 1946 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1947 /// or protocol against those declared in their implementations. 1948 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1949 const SelectorSet &ClsMap, 1950 SelectorSet &InsMapSeen, 1951 SelectorSet &ClsMapSeen, 1952 ObjCImplDecl* IMPDecl, 1953 ObjCContainerDecl* IDecl, 1954 bool &IncompleteImpl, 1955 bool ImmediateClass, 1956 bool WarnCategoryMethodImpl=false); 1957 1958 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in 1959 /// category matches with those implemented in its primary class and 1960 /// warns each time an exact match is found. 1961 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP); 1962 1963 /// \brief Add the given method to the list of globally-known methods. 1964 void addMethodToGlobalList(ObjCMethodList *List, ObjCMethodDecl *Method); 1965 1966private: 1967 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1968 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1969 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1970 1971 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1972 /// optionally warns if there are multiple signatures. 1973 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1974 bool receiverIdOrClass, 1975 bool warn, bool instance); 1976 1977public: 1978 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1979 /// unit are added to a global pool. This allows us to efficiently associate 1980 /// a selector with a method declaraation for purposes of typechecking 1981 /// messages sent to "id" (where the class of the object is unknown). 1982 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1983 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1984 } 1985 1986 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1987 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1988 AddMethodToGlobalPool(Method, impl, /*instance*/false); 1989 } 1990 1991 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global 1992 /// pool. 1993 void AddAnyMethodToGlobalPool(Decl *D); 1994 1995 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 1996 /// there are multiple signatures. 1997 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 1998 bool receiverIdOrClass=false, 1999 bool warn=true) { 2000 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2001 warn, /*instance*/true); 2002 } 2003 2004 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 2005 /// there are multiple signatures. 2006 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 2007 bool receiverIdOrClass=false, 2008 bool warn=true) { 2009 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2010 warn, /*instance*/false); 2011 } 2012 2013 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 2014 /// implementation. 2015 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 2016 2017 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 2018 /// initialization. 2019 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 2020 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 2021 2022 //===--------------------------------------------------------------------===// 2023 // Statement Parsing Callbacks: SemaStmt.cpp. 2024public: 2025 class FullExprArg { 2026 public: 2027 FullExprArg(Sema &actions) : E(0) { } 2028 2029 // FIXME: The const_cast here is ugly. RValue references would make this 2030 // much nicer (or we could duplicate a bunch of the move semantics 2031 // emulation code from Ownership.h). 2032 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 2033 2034 ExprResult release() { 2035 return move(E); 2036 } 2037 2038 Expr *get() const { return E; } 2039 2040 Expr *operator->() { 2041 return E; 2042 } 2043 2044 private: 2045 // FIXME: No need to make the entire Sema class a friend when it's just 2046 // Sema::MakeFullExpr that needs access to the constructor below. 2047 friend class Sema; 2048 2049 explicit FullExprArg(Expr *expr) : E(expr) {} 2050 2051 Expr *E; 2052 }; 2053 2054 FullExprArg MakeFullExpr(Expr *Arg) { 2055 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 2056 } 2057 2058 StmtResult ActOnExprStmt(FullExprArg Expr); 2059 2060 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 2061 bool HasLeadingEmptyMacro = false); 2062 2063 void ActOnStartOfCompoundStmt(); 2064 void ActOnFinishOfCompoundStmt(); 2065 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 2066 MultiStmtArg Elts, 2067 bool isStmtExpr); 2068 2069 /// \brief A RAII object to enter scope of a compound statement. 2070 class CompoundScopeRAII { 2071 public: 2072 CompoundScopeRAII(Sema &S): S(S) { 2073 S.ActOnStartOfCompoundStmt(); 2074 } 2075 2076 ~CompoundScopeRAII() { 2077 S.ActOnFinishOfCompoundStmt(); 2078 } 2079 2080 private: 2081 Sema &S; 2082 }; 2083 2084 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2085 SourceLocation StartLoc, 2086 SourceLocation EndLoc); 2087 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2088 StmtResult ActOnForEachLValueExpr(Expr *E); 2089 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2090 SourceLocation DotDotDotLoc, Expr *RHSVal, 2091 SourceLocation ColonLoc); 2092 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2093 2094 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2095 SourceLocation ColonLoc, 2096 Stmt *SubStmt, Scope *CurScope); 2097 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2098 SourceLocation ColonLoc, Stmt *SubStmt); 2099 2100 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2101 FullExprArg CondVal, Decl *CondVar, 2102 Stmt *ThenVal, 2103 SourceLocation ElseLoc, Stmt *ElseVal); 2104 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2105 Expr *Cond, 2106 Decl *CondVar); 2107 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2108 Stmt *Switch, Stmt *Body); 2109 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2110 FullExprArg Cond, 2111 Decl *CondVar, Stmt *Body); 2112 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2113 SourceLocation WhileLoc, 2114 SourceLocation CondLParen, Expr *Cond, 2115 SourceLocation CondRParen); 2116 2117 StmtResult ActOnForStmt(SourceLocation ForLoc, 2118 SourceLocation LParenLoc, 2119 Stmt *First, FullExprArg Second, 2120 Decl *SecondVar, 2121 FullExprArg Third, 2122 SourceLocation RParenLoc, 2123 Stmt *Body); 2124 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc, 2125 Expr *collection); 2126 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2127 SourceLocation LParenLoc, 2128 Stmt *First, Expr *Second, 2129 SourceLocation RParenLoc, Stmt *Body); 2130 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2131 SourceLocation LParenLoc, Stmt *LoopVar, 2132 SourceLocation ColonLoc, Expr *Collection, 2133 SourceLocation RParenLoc); 2134 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2135 SourceLocation ColonLoc, 2136 Stmt *RangeDecl, Stmt *BeginEndDecl, 2137 Expr *Cond, Expr *Inc, 2138 Stmt *LoopVarDecl, 2139 SourceLocation RParenLoc); 2140 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2141 2142 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2143 SourceLocation LabelLoc, 2144 LabelDecl *TheDecl); 2145 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2146 SourceLocation StarLoc, 2147 Expr *DestExp); 2148 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2149 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2150 2151 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2152 bool AllowFunctionParameters); 2153 2154 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2155 StmtResult ActOnCapScopeReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2156 2157 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2158 bool IsSimple, bool IsVolatile, 2159 unsigned NumOutputs, unsigned NumInputs, 2160 IdentifierInfo **Names, 2161 MultiExprArg Constraints, 2162 MultiExprArg Exprs, 2163 Expr *AsmString, 2164 MultiExprArg Clobbers, 2165 SourceLocation RParenLoc, 2166 bool MSAsm = false); 2167 2168 2169 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2170 SourceLocation StartLoc, 2171 SourceLocation IdLoc, IdentifierInfo *Id, 2172 bool Invalid = false); 2173 2174 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2175 2176 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2177 Decl *Parm, Stmt *Body); 2178 2179 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2180 2181 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2182 MultiStmtArg Catch, Stmt *Finally); 2183 2184 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2185 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2186 Scope *CurScope); 2187 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, 2188 Expr *operand); 2189 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2190 Expr *SynchExpr, 2191 Stmt *SynchBody); 2192 2193 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2194 2195 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2196 SourceLocation StartLoc, 2197 SourceLocation IdLoc, 2198 IdentifierInfo *Id); 2199 2200 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2201 2202 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2203 Decl *ExDecl, Stmt *HandlerBlock); 2204 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2205 MultiStmtArg Handlers); 2206 2207 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2208 SourceLocation TryLoc, 2209 Stmt *TryBlock, 2210 Stmt *Handler); 2211 2212 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2213 Expr *FilterExpr, 2214 Stmt *Block); 2215 2216 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2217 Stmt *Block); 2218 2219 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2220 2221 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2222 2223 /// \brief If it's a file scoped decl that must warn if not used, keep track 2224 /// of it. 2225 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2226 2227 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2228 /// whose result is unused, warn. 2229 void DiagnoseUnusedExprResult(const Stmt *S); 2230 void DiagnoseUnusedDecl(const NamedDecl *ND); 2231 2232 /// Emit \p DiagID if statement located on \p StmtLoc has a suspicious null 2233 /// statement as a \p Body, and it is located on the same line. 2234 /// 2235 /// This helps prevent bugs due to typos, such as: 2236 /// if (condition); 2237 /// do_stuff(); 2238 void DiagnoseEmptyStmtBody(SourceLocation StmtLoc, 2239 const Stmt *Body, 2240 unsigned DiagID); 2241 2242 /// Warn if a for/while loop statement \p S, which is followed by 2243 /// \p PossibleBody, has a suspicious null statement as a body. 2244 void DiagnoseEmptyLoopBody(const Stmt *S, 2245 const Stmt *PossibleBody); 2246 2247 ParsingDeclState PushParsingDeclaration() { 2248 return DelayedDiagnostics.pushParsingDecl(); 2249 } 2250 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2251 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2252 } 2253 2254 typedef ProcessingContextState ParsingClassState; 2255 ParsingClassState PushParsingClass() { 2256 return DelayedDiagnostics.pushContext(); 2257 } 2258 void PopParsingClass(ParsingClassState state) { 2259 DelayedDiagnostics.popContext(state); 2260 } 2261 2262 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2263 SourceLocation Loc, 2264 const ObjCInterfaceDecl *UnknownObjCClass=0); 2265 2266 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2267 2268 bool makeUnavailableInSystemHeader(SourceLocation loc, 2269 StringRef message); 2270 2271 //===--------------------------------------------------------------------===// 2272 // Expression Parsing Callbacks: SemaExpr.cpp. 2273 2274 bool CanUseDecl(NamedDecl *D); 2275 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2276 const ObjCInterfaceDecl *UnknownObjCClass=0); 2277 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2278 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2279 ObjCMethodDecl *Getter, 2280 SourceLocation Loc); 2281 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2282 Expr **Args, unsigned NumArgs); 2283 2284 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 2285 2286 void PopExpressionEvaluationContext(); 2287 2288 void DiscardCleanupsInEvaluationContext(); 2289 2290 ExprResult TranformToPotentiallyEvaluated(Expr *E); 2291 ExprResult HandleExprEvaluationContextForTypeof(Expr *E); 2292 2293 // Functions for marking a declaration referenced. These functions also 2294 // contain the relevant logic for marking if a reference to a function or 2295 // variable is an odr-use (in the C++11 sense). There are separate variants 2296 // for expressions referring to a decl; these exist because odr-use marking 2297 // needs to be delayed for some constant variables when we build one of the 2298 // named expressions. 2299 void MarkAnyDeclReferenced(SourceLocation Loc, Decl *D); 2300 void MarkFunctionReferenced(SourceLocation Loc, FunctionDecl *Func); 2301 void MarkVariableReferenced(SourceLocation Loc, VarDecl *Var); 2302 void MarkBlockDeclRefReferenced(BlockDeclRefExpr *E); 2303 void MarkDeclRefReferenced(DeclRefExpr *E); 2304 void MarkMemberReferenced(MemberExpr *E); 2305 2306 void UpdateMarkingForLValueToRValue(Expr *E); 2307 void CleanupVarDeclMarking(); 2308 2309 /// \brief Determine whether we can capture the given variable in 2310 /// the given scope. 2311 /// 2312 /// \param Explicit Whether this is an explicit capture (vs. an 2313 /// implicit capture). 2314 /// 2315 /// \param Diagnose Diagnose errors that occur when attempting to perform 2316 /// the capture. 2317 /// 2318 /// \param Var The variable to check for capture. 2319 /// 2320 /// \param Type Will be set to the type used to perform the capture. 2321 /// 2322 /// \param FunctionScopesIndex Will be set to the index of the first 2323 /// scope in which capture will need to be performed. 2324 /// 2325 /// \param Nested Whether this will be a nested capture. 2326 bool canCaptureVariable(VarDecl *Var, SourceLocation Loc, bool Explicit, 2327 bool Diagnose, QualType &Type, 2328 unsigned &FunctionScopesIndex, bool &Nested); 2329 2330 /// \brief Determine the type of the field that will capture the 2331 /// given variable in a lambda expression. 2332 /// 2333 /// \param T The type of the variable being captured. 2334 /// \param ByRef Whether we are capturing by reference or by value. 2335 QualType getLambdaCaptureFieldType(QualType T, bool ByRef); 2336 2337 enum TryCaptureKind { 2338 TryCapture_Implicit, TryCapture_ExplicitByVal, TryCapture_ExplicitByRef 2339 }; 2340 void TryCaptureVar(VarDecl *var, SourceLocation loc, 2341 TryCaptureKind Kind = TryCapture_Implicit, 2342 SourceLocation EllipsisLoc = SourceLocation()); 2343 2344 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2345 void MarkDeclarationsReferencedInExpr(Expr *E); 2346 2347 /// \brief Try to recover by turning the given expression into a 2348 /// call. Returns true if recovery was attempted or an error was 2349 /// emitted; this may also leave the ExprResult invalid. 2350 bool tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD, 2351 bool ForceComplain = false, 2352 bool (*IsPlausibleResult)(QualType) = 0); 2353 2354 /// \brief Figure out if an expression could be turned into a call. 2355 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2356 UnresolvedSetImpl &NonTemplateOverloads); 2357 2358 /// \brief Conditionally issue a diagnostic based on the current 2359 /// evaluation context. 2360 /// 2361 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2362 /// the function body is parsed, and then do a basic reachability analysis to 2363 /// determine if the statement is reachable. If it is unreachable, the 2364 /// diagnostic will not be emitted. 2365 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement, 2366 const PartialDiagnostic &PD); 2367 2368 // Primary Expressions. 2369 SourceRange getExprRange(Expr *E) const; 2370 2371 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, 2372 SourceLocation TemplateKWLoc, 2373 UnqualifiedId &Id, 2374 bool HasTrailingLParen, bool IsAddressOfOperand, 2375 CorrectionCandidateCallback *CCC = 0); 2376 2377 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2378 TemplateArgumentListInfo &Buffer, 2379 DeclarationNameInfo &NameInfo, 2380 const TemplateArgumentListInfo *&TemplateArgs); 2381 2382 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2383 CorrectionCandidateCallback &CCC, 2384 TemplateArgumentListInfo *ExplicitTemplateArgs = 0, 2385 Expr **Args = 0, unsigned NumArgs = 0); 2386 2387 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S, 2388 IdentifierInfo *II, 2389 bool AllowBuiltinCreation=false); 2390 2391 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2392 SourceLocation TemplateKWLoc, 2393 const DeclarationNameInfo &NameInfo, 2394 bool isAddressOfOperand, 2395 const TemplateArgumentListInfo *TemplateArgs); 2396 2397 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2398 ExprValueKind VK, 2399 SourceLocation Loc, 2400 const CXXScopeSpec *SS = 0); 2401 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2402 ExprValueKind VK, 2403 const DeclarationNameInfo &NameInfo, 2404 const CXXScopeSpec *SS = 0); 2405 ExprResult 2406 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2407 SourceLocation nameLoc, 2408 IndirectFieldDecl *indirectField, 2409 Expr *baseObjectExpr = 0, 2410 SourceLocation opLoc = SourceLocation()); 2411 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2412 SourceLocation TemplateKWLoc, 2413 LookupResult &R, 2414 const TemplateArgumentListInfo *TemplateArgs); 2415 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2416 SourceLocation TemplateKWLoc, 2417 LookupResult &R, 2418 const TemplateArgumentListInfo *TemplateArgs, 2419 bool IsDefiniteInstance); 2420 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2421 const LookupResult &R, 2422 bool HasTrailingLParen); 2423 2424 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2425 const DeclarationNameInfo &NameInfo); 2426 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2427 SourceLocation TemplateKWLoc, 2428 const DeclarationNameInfo &NameInfo, 2429 const TemplateArgumentListInfo *TemplateArgs); 2430 2431 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2432 LookupResult &R, 2433 bool NeedsADL); 2434 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2435 const DeclarationNameInfo &NameInfo, 2436 NamedDecl *D); 2437 2438 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2439 ExprResult ActOnNumericConstant(const Token &Tok); 2440 ExprResult ActOnCharacterConstant(const Token &Tok); 2441 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E); 2442 ExprResult ActOnParenListExpr(SourceLocation L, 2443 SourceLocation R, 2444 MultiExprArg Val); 2445 2446 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2447 /// fragments (e.g. "foo" "bar" L"baz"). 2448 ExprResult ActOnStringLiteral(const Token *StringToks, 2449 unsigned NumStringToks); 2450 2451 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2452 SourceLocation DefaultLoc, 2453 SourceLocation RParenLoc, 2454 Expr *ControllingExpr, 2455 MultiTypeArg ArgTypes, 2456 MultiExprArg ArgExprs); 2457 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2458 SourceLocation DefaultLoc, 2459 SourceLocation RParenLoc, 2460 Expr *ControllingExpr, 2461 TypeSourceInfo **Types, 2462 Expr **Exprs, 2463 unsigned NumAssocs); 2464 2465 // Binary/Unary Operators. 'Tok' is the token for the operator. 2466 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2467 Expr *InputExpr); 2468 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2469 UnaryOperatorKind Opc, Expr *Input); 2470 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2471 tok::TokenKind Op, Expr *Input); 2472 2473 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo, 2474 SourceLocation OpLoc, 2475 UnaryExprOrTypeTrait ExprKind, 2476 SourceRange R); 2477 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2478 UnaryExprOrTypeTrait ExprKind); 2479 ExprResult 2480 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2481 UnaryExprOrTypeTrait ExprKind, 2482 bool IsType, void *TyOrEx, 2483 const SourceRange &ArgRange); 2484 2485 ExprResult CheckPlaceholderExpr(Expr *E); 2486 bool CheckVecStepExpr(Expr *E); 2487 2488 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2489 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc, 2490 SourceRange ExprRange, 2491 UnaryExprOrTypeTrait ExprKind); 2492 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2493 SourceLocation OpLoc, 2494 IdentifierInfo &Name, 2495 SourceLocation NameLoc, 2496 SourceLocation RParenLoc); 2497 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2498 tok::TokenKind Kind, Expr *Input); 2499 2500 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2501 Expr *Idx, SourceLocation RLoc); 2502 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2503 Expr *Idx, SourceLocation RLoc); 2504 2505 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2506 SourceLocation OpLoc, bool IsArrow, 2507 CXXScopeSpec &SS, 2508 SourceLocation TemplateKWLoc, 2509 NamedDecl *FirstQualifierInScope, 2510 const DeclarationNameInfo &NameInfo, 2511 const TemplateArgumentListInfo *TemplateArgs); 2512 2513 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2514 SourceLocation OpLoc, bool IsArrow, 2515 const CXXScopeSpec &SS, 2516 SourceLocation TemplateKWLoc, 2517 NamedDecl *FirstQualifierInScope, 2518 LookupResult &R, 2519 const TemplateArgumentListInfo *TemplateArgs, 2520 bool SuppressQualifierCheck = false); 2521 2522 ExprResult PerformMemberExprBaseConversion(Expr *Base, bool IsArrow); 2523 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2524 bool &IsArrow, SourceLocation OpLoc, 2525 CXXScopeSpec &SS, 2526 Decl *ObjCImpDecl, 2527 bool HasTemplateArgs); 2528 2529 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2530 const CXXScopeSpec &SS, 2531 const LookupResult &R); 2532 2533 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2534 bool IsArrow, SourceLocation OpLoc, 2535 const CXXScopeSpec &SS, 2536 SourceLocation TemplateKWLoc, 2537 NamedDecl *FirstQualifierInScope, 2538 const DeclarationNameInfo &NameInfo, 2539 const TemplateArgumentListInfo *TemplateArgs); 2540 2541 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2542 SourceLocation OpLoc, 2543 tok::TokenKind OpKind, 2544 CXXScopeSpec &SS, 2545 SourceLocation TemplateKWLoc, 2546 UnqualifiedId &Member, 2547 Decl *ObjCImpDecl, 2548 bool HasTrailingLParen); 2549 2550 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2551 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2552 FunctionDecl *FDecl, 2553 const FunctionProtoType *Proto, 2554 Expr **Args, unsigned NumArgs, 2555 SourceLocation RParenLoc, 2556 bool ExecConfig = false); 2557 void CheckStaticArrayArgument(SourceLocation CallLoc, 2558 ParmVarDecl *Param, 2559 const Expr *ArgExpr); 2560 2561 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2562 /// This provides the location of the left/right parens and a list of comma 2563 /// locations. 2564 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2565 MultiExprArg ArgExprs, SourceLocation RParenLoc, 2566 Expr *ExecConfig = 0, bool IsExecConfig = false); 2567 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2568 SourceLocation LParenLoc, 2569 Expr **Args, unsigned NumArgs, 2570 SourceLocation RParenLoc, 2571 Expr *Config = 0, 2572 bool IsExecConfig = false); 2573 2574 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2575 MultiExprArg ExecConfig, 2576 SourceLocation GGGLoc); 2577 2578 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2579 Declarator &D, ParsedType &Ty, 2580 SourceLocation RParenLoc, Expr *CastExpr); 2581 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2582 TypeSourceInfo *Ty, 2583 SourceLocation RParenLoc, 2584 Expr *Op); 2585 CastKind PrepareScalarCast(ExprResult &src, QualType destType); 2586 2587 /// \brief Build an altivec or OpenCL literal. 2588 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2589 SourceLocation RParenLoc, Expr *E, 2590 TypeSourceInfo *TInfo); 2591 2592 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2593 2594 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2595 ParsedType Ty, 2596 SourceLocation RParenLoc, 2597 Expr *InitExpr); 2598 2599 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2600 TypeSourceInfo *TInfo, 2601 SourceLocation RParenLoc, 2602 Expr *LiteralExpr); 2603 2604 ExprResult ActOnInitList(SourceLocation LBraceLoc, 2605 MultiExprArg InitArgList, 2606 SourceLocation RBraceLoc); 2607 2608 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2609 SourceLocation Loc, 2610 bool GNUSyntax, 2611 ExprResult Init); 2612 2613 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2614 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr); 2615 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2616 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr); 2617 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc, 2618 Expr *LHSExpr, Expr *RHSExpr); 2619 2620 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2621 /// in the case of a the GNU conditional expr extension. 2622 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2623 SourceLocation ColonLoc, 2624 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr); 2625 2626 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2627 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2628 LabelDecl *TheDecl); 2629 2630 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2631 SourceLocation RPLoc); // "({..})" 2632 2633 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2634 struct OffsetOfComponent { 2635 SourceLocation LocStart, LocEnd; 2636 bool isBrackets; // true if [expr], false if .ident 2637 union { 2638 IdentifierInfo *IdentInfo; 2639 Expr *E; 2640 } U; 2641 }; 2642 2643 /// __builtin_offsetof(type, a.b[123][456].c) 2644 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2645 TypeSourceInfo *TInfo, 2646 OffsetOfComponent *CompPtr, 2647 unsigned NumComponents, 2648 SourceLocation RParenLoc); 2649 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2650 SourceLocation BuiltinLoc, 2651 SourceLocation TypeLoc, 2652 ParsedType ParsedArgTy, 2653 OffsetOfComponent *CompPtr, 2654 unsigned NumComponents, 2655 SourceLocation RParenLoc); 2656 2657 // __builtin_choose_expr(constExpr, expr1, expr2) 2658 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2659 Expr *CondExpr, Expr *LHSExpr, 2660 Expr *RHSExpr, SourceLocation RPLoc); 2661 2662 // __builtin_va_arg(expr, type) 2663 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, 2664 SourceLocation RPLoc); 2665 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E, 2666 TypeSourceInfo *TInfo, SourceLocation RPLoc); 2667 2668 // __null 2669 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2670 2671 bool CheckCaseExpression(Expr *E); 2672 2673 /// \brief Describes the result of an "if-exists" condition check. 2674 enum IfExistsResult { 2675 /// \brief The symbol exists. 2676 IER_Exists, 2677 2678 /// \brief The symbol does not exist. 2679 IER_DoesNotExist, 2680 2681 /// \brief The name is a dependent name, so the results will differ 2682 /// from one instantiation to the next. 2683 IER_Dependent, 2684 2685 /// \brief An error occurred. 2686 IER_Error 2687 }; 2688 2689 IfExistsResult 2690 CheckMicrosoftIfExistsSymbol(Scope *S, CXXScopeSpec &SS, 2691 const DeclarationNameInfo &TargetNameInfo); 2692 2693 IfExistsResult 2694 CheckMicrosoftIfExistsSymbol(Scope *S, SourceLocation KeywordLoc, 2695 bool IsIfExists, CXXScopeSpec &SS, 2696 UnqualifiedId &Name); 2697 2698 StmtResult BuildMSDependentExistsStmt(SourceLocation KeywordLoc, 2699 bool IsIfExists, 2700 NestedNameSpecifierLoc QualifierLoc, 2701 DeclarationNameInfo NameInfo, 2702 Stmt *Nested); 2703 StmtResult ActOnMSDependentExistsStmt(SourceLocation KeywordLoc, 2704 bool IsIfExists, 2705 CXXScopeSpec &SS, UnqualifiedId &Name, 2706 Stmt *Nested); 2707 2708 //===------------------------- "Block" Extension ------------------------===// 2709 2710 /// ActOnBlockStart - This callback is invoked when a block literal is 2711 /// started. 2712 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2713 2714 /// ActOnBlockArguments - This callback allows processing of block arguments. 2715 /// If there are no arguments, this is still invoked. 2716 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2717 2718 /// ActOnBlockError - If there is an error parsing a block, this callback 2719 /// is invoked to pop the information about the block from the action impl. 2720 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2721 2722 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2723 /// literal was successfully completed. ^(int x){...} 2724 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body, 2725 Scope *CurScope); 2726 2727 //===---------------------------- OpenCL Features -----------------------===// 2728 2729 /// __builtin_astype(...) 2730 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, 2731 SourceLocation BuiltinLoc, 2732 SourceLocation RParenLoc); 2733 2734 //===---------------------------- C++ Features --------------------------===// 2735 2736 // Act on C++ namespaces 2737 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2738 SourceLocation NamespaceLoc, 2739 SourceLocation IdentLoc, 2740 IdentifierInfo *Ident, 2741 SourceLocation LBrace, 2742 AttributeList *AttrList); 2743 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2744 2745 NamespaceDecl *getStdNamespace() const; 2746 NamespaceDecl *getOrCreateStdNamespace(); 2747 2748 CXXRecordDecl *getStdBadAlloc() const; 2749 2750 /// \brief Tests whether Ty is an instance of std::initializer_list and, if 2751 /// it is and Element is not NULL, assigns the element type to Element. 2752 bool isStdInitializerList(QualType Ty, QualType *Element); 2753 2754 /// \brief Looks for the std::initializer_list template and instantiates it 2755 /// with Element, or emits an error if it's not found. 2756 /// 2757 /// \returns The instantiated template, or null on error. 2758 QualType BuildStdInitializerList(QualType Element, SourceLocation Loc); 2759 2760 /// \brief Determine whether Ctor is an initializer-list constructor, as 2761 /// defined in [dcl.init.list]p2. 2762 bool isInitListConstructor(const CXXConstructorDecl *Ctor); 2763 2764 Decl *ActOnUsingDirective(Scope *CurScope, 2765 SourceLocation UsingLoc, 2766 SourceLocation NamespcLoc, 2767 CXXScopeSpec &SS, 2768 SourceLocation IdentLoc, 2769 IdentifierInfo *NamespcName, 2770 AttributeList *AttrList); 2771 2772 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2773 2774 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2775 SourceLocation NamespaceLoc, 2776 SourceLocation AliasLoc, 2777 IdentifierInfo *Alias, 2778 CXXScopeSpec &SS, 2779 SourceLocation IdentLoc, 2780 IdentifierInfo *Ident); 2781 2782 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2783 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2784 const LookupResult &PreviousDecls); 2785 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2786 NamedDecl *Target); 2787 2788 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2789 bool isTypeName, 2790 const CXXScopeSpec &SS, 2791 SourceLocation NameLoc, 2792 const LookupResult &Previous); 2793 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2794 const CXXScopeSpec &SS, 2795 SourceLocation NameLoc); 2796 2797 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2798 SourceLocation UsingLoc, 2799 CXXScopeSpec &SS, 2800 const DeclarationNameInfo &NameInfo, 2801 AttributeList *AttrList, 2802 bool IsInstantiation, 2803 bool IsTypeName, 2804 SourceLocation TypenameLoc); 2805 2806 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2807 2808 Decl *ActOnUsingDeclaration(Scope *CurScope, 2809 AccessSpecifier AS, 2810 bool HasUsingKeyword, 2811 SourceLocation UsingLoc, 2812 CXXScopeSpec &SS, 2813 UnqualifiedId &Name, 2814 AttributeList *AttrList, 2815 bool IsTypeName, 2816 SourceLocation TypenameLoc); 2817 Decl *ActOnAliasDeclaration(Scope *CurScope, 2818 AccessSpecifier AS, 2819 MultiTemplateParamsArg TemplateParams, 2820 SourceLocation UsingLoc, 2821 UnqualifiedId &Name, 2822 TypeResult Type); 2823 2824 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2825 /// and sets it as the initializer for the the passed in VarDecl. 2826 bool InitializeVarWithConstructor(VarDecl *VD, 2827 CXXConstructorDecl *Constructor, 2828 MultiExprArg Exprs, 2829 bool HadMultipleCandidates); 2830 2831 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2832 /// including handling of its default argument expressions. 2833 /// 2834 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2835 ExprResult 2836 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2837 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2838 bool HadMultipleCandidates, bool RequiresZeroInit, 2839 unsigned ConstructKind, SourceRange ParenRange); 2840 2841 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2842 // the constructor can be elidable? 2843 ExprResult 2844 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2845 CXXConstructorDecl *Constructor, bool Elidable, 2846 MultiExprArg Exprs, bool HadMultipleCandidates, 2847 bool RequiresZeroInit, unsigned ConstructKind, 2848 SourceRange ParenRange); 2849 2850 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2851 /// the default expr if needed. 2852 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2853 FunctionDecl *FD, 2854 ParmVarDecl *Param); 2855 2856 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2857 /// constructed variable. 2858 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2859 2860 /// \brief Helper class that collects exception specifications for 2861 /// implicitly-declared special member functions. 2862 class ImplicitExceptionSpecification { 2863 // Pointer to allow copying 2864 ASTContext *Context; 2865 // We order exception specifications thus: 2866 // noexcept is the most restrictive, but is only used in C++0x. 2867 // throw() comes next. 2868 // Then a throw(collected exceptions) 2869 // Finally no specification. 2870 // throw(...) is used instead if any called function uses it. 2871 // 2872 // If this exception specification cannot be known yet (for instance, 2873 // because this is the exception specification for a defaulted default 2874 // constructor and we haven't finished parsing the deferred parts of the 2875 // class yet), the C++0x standard does not specify how to behave. We 2876 // record this as an 'unknown' exception specification, which overrules 2877 // any other specification (even 'none', to keep this rule simple). 2878 ExceptionSpecificationType ComputedEST; 2879 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2880 SmallVector<QualType, 4> Exceptions; 2881 2882 void ClearExceptions() { 2883 ExceptionsSeen.clear(); 2884 Exceptions.clear(); 2885 } 2886 2887 public: 2888 explicit ImplicitExceptionSpecification(ASTContext &Context) 2889 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2890 if (!Context.getLangOptions().CPlusPlus0x) 2891 ComputedEST = EST_DynamicNone; 2892 } 2893 2894 /// \brief Get the computed exception specification type. 2895 ExceptionSpecificationType getExceptionSpecType() const { 2896 assert(ComputedEST != EST_ComputedNoexcept && 2897 "noexcept(expr) should not be a possible result"); 2898 return ComputedEST; 2899 } 2900 2901 /// \brief The number of exceptions in the exception specification. 2902 unsigned size() const { return Exceptions.size(); } 2903 2904 /// \brief The set of exceptions in the exception specification. 2905 const QualType *data() const { return Exceptions.data(); } 2906 2907 /// \brief Integrate another called method into the collected data. 2908 void CalledDecl(CXXMethodDecl *Method); 2909 2910 /// \brief Integrate an invoked expression into the collected data. 2911 void CalledExpr(Expr *E); 2912 2913 /// \brief Specify that the exception specification can't be detemined yet. 2914 void SetDelayed() { 2915 ClearExceptions(); 2916 ComputedEST = EST_Delayed; 2917 } 2918 2919 FunctionProtoType::ExtProtoInfo getEPI() const { 2920 FunctionProtoType::ExtProtoInfo EPI; 2921 EPI.ExceptionSpecType = getExceptionSpecType(); 2922 EPI.NumExceptions = size(); 2923 EPI.Exceptions = data(); 2924 return EPI; 2925 } 2926 }; 2927 2928 /// \brief Determine what sort of exception specification a defaulted 2929 /// copy constructor of a class will have. 2930 ImplicitExceptionSpecification 2931 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2932 2933 /// \brief Determine what sort of exception specification a defaulted 2934 /// default constructor of a class will have, and whether the parameter 2935 /// will be const. 2936 std::pair<ImplicitExceptionSpecification, bool> 2937 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2938 2939 /// \brief Determine what sort of exception specification a defautled 2940 /// copy assignment operator of a class will have, and whether the 2941 /// parameter will be const. 2942 std::pair<ImplicitExceptionSpecification, bool> 2943 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2944 2945 /// \brief Determine what sort of exception specification a defaulted move 2946 /// constructor of a class will have. 2947 ImplicitExceptionSpecification 2948 ComputeDefaultedMoveCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2949 2950 /// \brief Determine what sort of exception specification a defaulted move 2951 /// assignment operator of a class will have. 2952 ImplicitExceptionSpecification 2953 ComputeDefaultedMoveAssignmentExceptionSpec(CXXRecordDecl *ClassDecl); 2954 2955 /// \brief Determine what sort of exception specification a defaulted 2956 /// destructor of a class will have. 2957 ImplicitExceptionSpecification 2958 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 2959 2960 /// \brief Determine if a special member function should have a deleted 2961 /// definition when it is defaulted. 2962 bool ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM); 2963 2964 /// \brief Determine if a defaulted copy assignment operator ought to be 2965 /// deleted. 2966 bool ShouldDeleteCopyAssignmentOperator(CXXMethodDecl *MD); 2967 2968 /// \brief Determine if a defaulted move assignment operator ought to be 2969 /// deleted. 2970 bool ShouldDeleteMoveAssignmentOperator(CXXMethodDecl *MD); 2971 2972 /// \brief Determine if a defaulted destructor ought to be deleted. 2973 bool ShouldDeleteDestructor(CXXDestructorDecl *DD); 2974 2975 /// \brief Declare the implicit default constructor for the given class. 2976 /// 2977 /// \param ClassDecl The class declaration into which the implicit 2978 /// default constructor will be added. 2979 /// 2980 /// \returns The implicitly-declared default constructor. 2981 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2982 CXXRecordDecl *ClassDecl); 2983 2984 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2985 /// defining this constructor as the default constructor. 2986 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2987 CXXConstructorDecl *Constructor); 2988 2989 /// \brief Declare the implicit destructor for the given class. 2990 /// 2991 /// \param ClassDecl The class declaration into which the implicit 2992 /// destructor will be added. 2993 /// 2994 /// \returns The implicitly-declared destructor. 2995 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2996 2997 /// DefineImplicitDestructor - Checks for feasibility of 2998 /// defining this destructor as the default destructor. 2999 void DefineImplicitDestructor(SourceLocation CurrentLocation, 3000 CXXDestructorDecl *Destructor); 3001 3002 /// \brief Build an exception spec for destructors that don't have one. 3003 /// 3004 /// C++11 says that user-defined destructors with no exception spec get one 3005 /// that looks as if the destructor was implicitly declared. 3006 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 3007 CXXDestructorDecl *Destructor); 3008 3009 /// \brief Declare all inherited constructors for the given class. 3010 /// 3011 /// \param ClassDecl The class declaration into which the inherited 3012 /// constructors will be added. 3013 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 3014 3015 /// \brief Declare the implicit copy constructor for the given class. 3016 /// 3017 /// \param ClassDecl The class declaration into which the implicit 3018 /// copy constructor will be added. 3019 /// 3020 /// \returns The implicitly-declared copy constructor. 3021 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 3022 3023 /// DefineImplicitCopyConstructor - Checks for feasibility of 3024 /// defining this constructor as the copy constructor. 3025 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 3026 CXXConstructorDecl *Constructor); 3027 3028 /// \brief Declare the implicit move constructor for the given class. 3029 /// 3030 /// \param ClassDecl The Class declaration into which the implicit 3031 /// move constructor will be added. 3032 /// 3033 /// \returns The implicitly-declared move constructor, or NULL if it wasn't 3034 /// declared. 3035 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl); 3036 3037 /// DefineImplicitMoveConstructor - Checks for feasibility of 3038 /// defining this constructor as the move constructor. 3039 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation, 3040 CXXConstructorDecl *Constructor); 3041 3042 /// \brief Declare the implicit copy assignment operator for the given class. 3043 /// 3044 /// \param ClassDecl The class declaration into which the implicit 3045 /// copy assignment operator will be added. 3046 /// 3047 /// \returns The implicitly-declared copy assignment operator. 3048 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 3049 3050 /// \brief Defines an implicitly-declared copy assignment operator. 3051 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 3052 CXXMethodDecl *MethodDecl); 3053 3054 /// \brief Declare the implicit move assignment operator for the given class. 3055 /// 3056 /// \param ClassDecl The Class declaration into which the implicit 3057 /// move assignment operator will be added. 3058 /// 3059 /// \returns The implicitly-declared move assignment operator, or NULL if it 3060 /// wasn't declared. 3061 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl); 3062 3063 /// \brief Defines an implicitly-declared move assignment operator. 3064 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation, 3065 CXXMethodDecl *MethodDecl); 3066 3067 /// \brief Force the declaration of any implicitly-declared members of this 3068 /// class. 3069 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 3070 3071 /// \brief Determine whether the given function is an implicitly-deleted 3072 /// special member function. 3073 bool isImplicitlyDeleted(FunctionDecl *FD); 3074 3075 /// MaybeBindToTemporary - If the passed in expression has a record type with 3076 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 3077 /// it simply returns the passed in expression. 3078 ExprResult MaybeBindToTemporary(Expr *E); 3079 3080 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 3081 MultiExprArg ArgsPtr, 3082 SourceLocation Loc, 3083 ASTOwningVector<Expr*> &ConvertedArgs); 3084 3085 ParsedType getDestructorName(SourceLocation TildeLoc, 3086 IdentifierInfo &II, SourceLocation NameLoc, 3087 Scope *S, CXXScopeSpec &SS, 3088 ParsedType ObjectType, 3089 bool EnteringContext); 3090 3091 ParsedType getDestructorType(const DeclSpec& DS, ParsedType ObjectType); 3092 3093 // Checks that reinterpret casts don't have undefined behavior. 3094 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 3095 bool IsDereference, SourceRange Range); 3096 3097 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 3098 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 3099 tok::TokenKind Kind, 3100 SourceLocation LAngleBracketLoc, 3101 Declarator &D, 3102 SourceLocation RAngleBracketLoc, 3103 SourceLocation LParenLoc, 3104 Expr *E, 3105 SourceLocation RParenLoc); 3106 3107 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 3108 tok::TokenKind Kind, 3109 TypeSourceInfo *Ty, 3110 Expr *E, 3111 SourceRange AngleBrackets, 3112 SourceRange Parens); 3113 3114 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3115 SourceLocation TypeidLoc, 3116 TypeSourceInfo *Operand, 3117 SourceLocation RParenLoc); 3118 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3119 SourceLocation TypeidLoc, 3120 Expr *Operand, 3121 SourceLocation RParenLoc); 3122 3123 /// ActOnCXXTypeid - Parse typeid( something ). 3124 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 3125 SourceLocation LParenLoc, bool isType, 3126 void *TyOrExpr, 3127 SourceLocation RParenLoc); 3128 3129 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3130 SourceLocation TypeidLoc, 3131 TypeSourceInfo *Operand, 3132 SourceLocation RParenLoc); 3133 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3134 SourceLocation TypeidLoc, 3135 Expr *Operand, 3136 SourceLocation RParenLoc); 3137 3138 /// ActOnCXXUuidof - Parse __uuidof( something ). 3139 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 3140 SourceLocation LParenLoc, bool isType, 3141 void *TyOrExpr, 3142 SourceLocation RParenLoc); 3143 3144 3145 //// ActOnCXXThis - Parse 'this' pointer. 3146 ExprResult ActOnCXXThis(SourceLocation loc); 3147 3148 /// \brief Try to retrieve the type of the 'this' pointer. 3149 /// 3150 /// \param Capture If true, capture 'this' in this context. 3151 /// 3152 /// \returns The type of 'this', if possible. Otherwise, returns a NULL type. 3153 QualType getCurrentThisType(); 3154 3155 /// \brief Make sure the value of 'this' is actually available in the current 3156 /// context, if it is a potentially evaluated context. 3157 /// 3158 /// \param Loc The location at which the capture of 'this' occurs. 3159 /// 3160 /// \param Explicit Whether 'this' is explicitly captured in a lambda 3161 /// capture list. 3162 void CheckCXXThisCapture(SourceLocation Loc, bool Explicit = false); 3163 3164 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 3165 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 3166 3167 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 3168 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 3169 3170 //// ActOnCXXThrow - Parse throw expressions. 3171 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 3172 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 3173 bool IsThrownVarInScope); 3174 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 3175 bool IsThrownVarInScope); 3176 3177 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 3178 /// Can be interpreted either as function-style casting ("int(x)") 3179 /// or class type construction ("ClassType(x,y,z)") 3180 /// or creation of a value-initialized type ("int()"). 3181 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 3182 SourceLocation LParenLoc, 3183 MultiExprArg Exprs, 3184 SourceLocation RParenLoc); 3185 3186 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 3187 SourceLocation LParenLoc, 3188 MultiExprArg Exprs, 3189 SourceLocation RParenLoc); 3190 3191 /// ActOnCXXNew - Parsed a C++ 'new' expression. 3192 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 3193 SourceLocation PlacementLParen, 3194 MultiExprArg PlacementArgs, 3195 SourceLocation PlacementRParen, 3196 SourceRange TypeIdParens, Declarator &D, 3197 SourceLocation ConstructorLParen, 3198 MultiExprArg ConstructorArgs, 3199 SourceLocation ConstructorRParen); 3200 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 3201 SourceLocation PlacementLParen, 3202 MultiExprArg PlacementArgs, 3203 SourceLocation PlacementRParen, 3204 SourceRange TypeIdParens, 3205 QualType AllocType, 3206 TypeSourceInfo *AllocTypeInfo, 3207 Expr *ArraySize, 3208 SourceLocation ConstructorLParen, 3209 MultiExprArg ConstructorArgs, 3210 SourceLocation ConstructorRParen, 3211 bool TypeMayContainAuto = true); 3212 3213 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 3214 SourceRange R); 3215 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 3216 bool UseGlobal, QualType AllocType, bool IsArray, 3217 Expr **PlaceArgs, unsigned NumPlaceArgs, 3218 FunctionDecl *&OperatorNew, 3219 FunctionDecl *&OperatorDelete); 3220 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 3221 DeclarationName Name, Expr** Args, 3222 unsigned NumArgs, DeclContext *Ctx, 3223 bool AllowMissing, FunctionDecl *&Operator, 3224 bool Diagnose = true); 3225 void DeclareGlobalNewDelete(); 3226 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 3227 QualType Argument, 3228 bool addMallocAttr = false); 3229 3230 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 3231 DeclarationName Name, FunctionDecl* &Operator, 3232 bool Diagnose = true); 3233 3234 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 3235 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 3236 bool UseGlobal, bool ArrayForm, 3237 Expr *Operand); 3238 3239 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 3240 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 3241 SourceLocation StmtLoc, 3242 bool ConvertToBoolean); 3243 3244 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 3245 Expr *Operand, SourceLocation RParen); 3246 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 3247 SourceLocation RParen); 3248 3249 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 3250 /// pseudo-functions. 3251 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 3252 SourceLocation KWLoc, 3253 ParsedType Ty, 3254 SourceLocation RParen); 3255 3256 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3257 SourceLocation KWLoc, 3258 TypeSourceInfo *T, 3259 SourceLocation RParen); 3260 3261 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3262 /// pseudo-functions. 3263 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3264 SourceLocation KWLoc, 3265 ParsedType LhsTy, 3266 ParsedType RhsTy, 3267 SourceLocation RParen); 3268 3269 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3270 SourceLocation KWLoc, 3271 TypeSourceInfo *LhsT, 3272 TypeSourceInfo *RhsT, 3273 SourceLocation RParen); 3274 3275 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3276 /// pseudo-functions. 3277 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3278 SourceLocation KWLoc, 3279 ParsedType LhsTy, 3280 Expr *DimExpr, 3281 SourceLocation RParen); 3282 3283 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3284 SourceLocation KWLoc, 3285 TypeSourceInfo *TSInfo, 3286 Expr *DimExpr, 3287 SourceLocation RParen); 3288 3289 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3290 /// pseudo-functions. 3291 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3292 SourceLocation KWLoc, 3293 Expr *Queried, 3294 SourceLocation RParen); 3295 3296 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3297 SourceLocation KWLoc, 3298 Expr *Queried, 3299 SourceLocation RParen); 3300 3301 ExprResult ActOnStartCXXMemberReference(Scope *S, 3302 Expr *Base, 3303 SourceLocation OpLoc, 3304 tok::TokenKind OpKind, 3305 ParsedType &ObjectType, 3306 bool &MayBePseudoDestructor); 3307 3308 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3309 3310 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3311 SourceLocation OpLoc, 3312 tok::TokenKind OpKind, 3313 const CXXScopeSpec &SS, 3314 TypeSourceInfo *ScopeType, 3315 SourceLocation CCLoc, 3316 SourceLocation TildeLoc, 3317 PseudoDestructorTypeStorage DestroyedType, 3318 bool HasTrailingLParen); 3319 3320 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3321 SourceLocation OpLoc, 3322 tok::TokenKind OpKind, 3323 CXXScopeSpec &SS, 3324 UnqualifiedId &FirstTypeName, 3325 SourceLocation CCLoc, 3326 SourceLocation TildeLoc, 3327 UnqualifiedId &SecondTypeName, 3328 bool HasTrailingLParen); 3329 3330 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3331 SourceLocation OpLoc, 3332 tok::TokenKind OpKind, 3333 SourceLocation TildeLoc, 3334 const DeclSpec& DS, 3335 bool HasTrailingLParen); 3336 3337 /// MaybeCreateExprWithCleanups - If the current full-expression 3338 /// requires any cleanups, surround it with a ExprWithCleanups node. 3339 /// Otherwise, just returns the passed-in expression. 3340 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3341 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3342 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3343 3344 ExprResult ActOnFinishFullExpr(Expr *Expr); 3345 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3346 3347 // Marks SS invalid if it represents an incomplete type. 3348 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3349 3350 DeclContext *computeDeclContext(QualType T); 3351 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3352 bool EnteringContext = false); 3353 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3354 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3355 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3356 3357 /// \brief The parser has parsed a global nested-name-specifier '::'. 3358 /// 3359 /// \param S The scope in which this nested-name-specifier occurs. 3360 /// 3361 /// \param CCLoc The location of the '::'. 3362 /// 3363 /// \param SS The nested-name-specifier, which will be updated in-place 3364 /// to reflect the parsed nested-name-specifier. 3365 /// 3366 /// \returns true if an error occurred, false otherwise. 3367 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3368 CXXScopeSpec &SS); 3369 3370 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3371 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3372 3373 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3374 SourceLocation IdLoc, 3375 IdentifierInfo &II, 3376 ParsedType ObjectType); 3377 3378 bool BuildCXXNestedNameSpecifier(Scope *S, 3379 IdentifierInfo &Identifier, 3380 SourceLocation IdentifierLoc, 3381 SourceLocation CCLoc, 3382 QualType ObjectType, 3383 bool EnteringContext, 3384 CXXScopeSpec &SS, 3385 NamedDecl *ScopeLookupResult, 3386 bool ErrorRecoveryLookup); 3387 3388 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3389 /// 3390 /// \param S The scope in which this nested-name-specifier occurs. 3391 /// 3392 /// \param Identifier The identifier preceding the '::'. 3393 /// 3394 /// \param IdentifierLoc The location of the identifier. 3395 /// 3396 /// \param CCLoc The location of the '::'. 3397 /// 3398 /// \param ObjectType The type of the object, if we're parsing 3399 /// nested-name-specifier in a member access expression. 3400 /// 3401 /// \param EnteringContext Whether we're entering the context nominated by 3402 /// this nested-name-specifier. 3403 /// 3404 /// \param SS The nested-name-specifier, which is both an input 3405 /// parameter (the nested-name-specifier before this type) and an 3406 /// output parameter (containing the full nested-name-specifier, 3407 /// including this new type). 3408 /// 3409 /// \returns true if an error occurred, false otherwise. 3410 bool ActOnCXXNestedNameSpecifier(Scope *S, 3411 IdentifierInfo &Identifier, 3412 SourceLocation IdentifierLoc, 3413 SourceLocation CCLoc, 3414 ParsedType ObjectType, 3415 bool EnteringContext, 3416 CXXScopeSpec &SS); 3417 3418 bool ActOnCXXNestedNameSpecifierDecltype(CXXScopeSpec &SS, 3419 const DeclSpec &DS, 3420 SourceLocation ColonColonLoc); 3421 3422 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3423 IdentifierInfo &Identifier, 3424 SourceLocation IdentifierLoc, 3425 SourceLocation ColonLoc, 3426 ParsedType ObjectType, 3427 bool EnteringContext); 3428 3429 /// \brief The parser has parsed a nested-name-specifier 3430 /// 'template[opt] template-name < template-args >::'. 3431 /// 3432 /// \param S The scope in which this nested-name-specifier occurs. 3433 /// 3434 /// \param SS The nested-name-specifier, which is both an input 3435 /// parameter (the nested-name-specifier before this type) and an 3436 /// output parameter (containing the full nested-name-specifier, 3437 /// including this new type). 3438 /// 3439 /// \param TemplateKWLoc the location of the 'template' keyword, if any. 3440 /// \param TemplateName The template name. 3441 /// \param TemplateNameLoc The location of the template name. 3442 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3443 /// \param TemplateArgs The template arguments. 3444 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3445 /// \param CCLoc The location of the '::'. 3446 /// 3447 /// \param EnteringContext Whether we're entering the context of the 3448 /// nested-name-specifier. 3449 /// 3450 /// 3451 /// \returns true if an error occurred, false otherwise. 3452 bool ActOnCXXNestedNameSpecifier(Scope *S, 3453 CXXScopeSpec &SS, 3454 SourceLocation TemplateKWLoc, 3455 TemplateTy Template, 3456 SourceLocation TemplateNameLoc, 3457 SourceLocation LAngleLoc, 3458 ASTTemplateArgsPtr TemplateArgs, 3459 SourceLocation RAngleLoc, 3460 SourceLocation CCLoc, 3461 bool EnteringContext); 3462 3463 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3464 /// that the parser can use later to reconstruct the given 3465 /// nested-name-specifier. 3466 /// 3467 /// \param SS A nested-name-specifier. 3468 /// 3469 /// \returns A pointer containing all of the information in the 3470 /// nested-name-specifier \p SS. 3471 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3472 3473 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3474 /// the nested-name-specifier structure. 3475 /// 3476 /// \param Annotation The annotation pointer, produced by 3477 /// \c SaveNestedNameSpecifierAnnotation(). 3478 /// 3479 /// \param AnnotationRange The source range corresponding to the annotation. 3480 /// 3481 /// \param SS The nested-name-specifier that will be updated with the contents 3482 /// of the annotation pointer. 3483 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3484 SourceRange AnnotationRange, 3485 CXXScopeSpec &SS); 3486 3487 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3488 3489 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3490 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3491 /// After this method is called, according to [C++ 3.4.3p3], names should be 3492 /// looked up in the declarator-id's scope, until the declarator is parsed and 3493 /// ActOnCXXExitDeclaratorScope is called. 3494 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3495 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3496 3497 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3498 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3499 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3500 /// Used to indicate that names should revert to being looked up in the 3501 /// defining scope. 3502 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3503 3504 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3505 /// initializer for the declaration 'Dcl'. 3506 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3507 /// static data member of class X, names should be looked up in the scope of 3508 /// class X. 3509 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3510 3511 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3512 /// initializer for the declaration 'Dcl'. 3513 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3514 3515 /// \brief Create a new lambda closure type. 3516 CXXRecordDecl *createLambdaClosureType(SourceRange IntroducerRange); 3517 3518 /// \brief Start the definition of a lambda expression. 3519 CXXMethodDecl *startLambdaDefinition(CXXRecordDecl *Class, 3520 SourceRange IntroducerRange, 3521 TypeSourceInfo *MethodType, 3522 SourceLocation EndLoc, 3523 llvm::ArrayRef<ParmVarDecl *> Params); 3524 3525 /// \brief Introduce the scope for a lambda expression. 3526 sema::LambdaScopeInfo *enterLambdaScope(CXXMethodDecl *CallOperator, 3527 SourceRange IntroducerRange, 3528 LambdaCaptureDefault CaptureDefault, 3529 bool ExplicitParams, 3530 bool ExplicitResultType, 3531 bool Mutable); 3532 3533 /// \brief Note that we have finished the explicit captures for the 3534 /// given lambda. 3535 void finishLambdaExplicitCaptures(sema::LambdaScopeInfo *LSI); 3536 3537 /// \brief Introduce the lambda parameters into scope. 3538 void addLambdaParameters(CXXMethodDecl *CallOperator, Scope *CurScope); 3539 3540 /// ActOnStartOfLambdaDefinition - This is called just before we start 3541 /// parsing the body of a lambda; it analyzes the explicit captures and 3542 /// arguments, and sets up various data-structures for the body of the 3543 /// lambda. 3544 void ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro, 3545 Declarator &ParamInfo, Scope *CurScope); 3546 3547 /// ActOnLambdaError - If there is an error parsing a lambda, this callback 3548 /// is invoked to pop the information about the lambda. 3549 void ActOnLambdaError(SourceLocation StartLoc, Scope *CurScope, 3550 bool IsInstantiation = false); 3551 3552 /// ActOnLambdaExpr - This is called when the body of a lambda expression 3553 /// was successfully completed. 3554 ExprResult ActOnLambdaExpr(SourceLocation StartLoc, Stmt *Body, 3555 Scope *CurScope, bool IsInstantiation = false); 3556 3557 /// \brief Define the "body" of the conversion from a lambda object to a 3558 /// function pointer. 3559 /// 3560 /// This routine doesn't actually define a sensible body; rather, it fills 3561 /// in the initialization expression needed to copy the lambda object into 3562 /// the block, and IR generation actually generates the real body of the 3563 /// block pointer conversion. 3564 void DefineImplicitLambdaToFunctionPointerConversion( 3565 SourceLocation CurrentLoc, CXXConversionDecl *Conv); 3566 3567 /// \brief Define the "body" of the conversion from a lambda object to a 3568 /// block pointer. 3569 /// 3570 /// This routine doesn't actually define a sensible body; rather, it fills 3571 /// in the initialization expression needed to copy the lambda object into 3572 /// the block, and IR generation actually generates the real body of the 3573 /// block pointer conversion. 3574 void DefineImplicitLambdaToBlockPointerConversion(SourceLocation CurrentLoc, 3575 CXXConversionDecl *Conv); 3576 3577 // ParseObjCStringLiteral - Parse Objective-C string literals. 3578 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3579 Expr **Strings, 3580 unsigned NumStrings); 3581 3582 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3583 TypeSourceInfo *EncodedTypeInfo, 3584 SourceLocation RParenLoc); 3585 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3586 CXXMethodDecl *Method, 3587 bool HadMultipleCandidates); 3588 3589 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3590 SourceLocation EncodeLoc, 3591 SourceLocation LParenLoc, 3592 ParsedType Ty, 3593 SourceLocation RParenLoc); 3594 3595 // ParseObjCSelectorExpression - Build selector expression for @selector 3596 ExprResult ParseObjCSelectorExpression(Selector Sel, 3597 SourceLocation AtLoc, 3598 SourceLocation SelLoc, 3599 SourceLocation LParenLoc, 3600 SourceLocation RParenLoc); 3601 3602 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3603 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3604 SourceLocation AtLoc, 3605 SourceLocation ProtoLoc, 3606 SourceLocation LParenLoc, 3607 SourceLocation RParenLoc); 3608 3609 //===--------------------------------------------------------------------===// 3610 // C++ Declarations 3611 // 3612 Decl *ActOnStartLinkageSpecification(Scope *S, 3613 SourceLocation ExternLoc, 3614 SourceLocation LangLoc, 3615 StringRef Lang, 3616 SourceLocation LBraceLoc); 3617 Decl *ActOnFinishLinkageSpecification(Scope *S, 3618 Decl *LinkageSpec, 3619 SourceLocation RBraceLoc); 3620 3621 3622 //===--------------------------------------------------------------------===// 3623 // C++ Classes 3624 // 3625 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3626 const CXXScopeSpec *SS = 0); 3627 3628 bool ActOnAccessSpecifier(AccessSpecifier Access, 3629 SourceLocation ASLoc, 3630 SourceLocation ColonLoc, 3631 AttributeList *Attrs = 0); 3632 3633 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3634 Declarator &D, 3635 MultiTemplateParamsArg TemplateParameterLists, 3636 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3637 bool HasDeferredInit); 3638 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3639 Expr *Init); 3640 3641 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3642 Scope *S, 3643 CXXScopeSpec &SS, 3644 IdentifierInfo *MemberOrBase, 3645 ParsedType TemplateTypeTy, 3646 const DeclSpec &DS, 3647 SourceLocation IdLoc, 3648 SourceLocation LParenLoc, 3649 Expr **Args, unsigned NumArgs, 3650 SourceLocation RParenLoc, 3651 SourceLocation EllipsisLoc); 3652 3653 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3654 Scope *S, 3655 CXXScopeSpec &SS, 3656 IdentifierInfo *MemberOrBase, 3657 ParsedType TemplateTypeTy, 3658 const DeclSpec &DS, 3659 SourceLocation IdLoc, 3660 Expr *InitList, 3661 SourceLocation EllipsisLoc); 3662 3663 MemInitResult BuildMemInitializer(Decl *ConstructorD, 3664 Scope *S, 3665 CXXScopeSpec &SS, 3666 IdentifierInfo *MemberOrBase, 3667 ParsedType TemplateTypeTy, 3668 const DeclSpec &DS, 3669 SourceLocation IdLoc, 3670 Expr *Init, 3671 SourceLocation EllipsisLoc); 3672 3673 MemInitResult BuildMemberInitializer(ValueDecl *Member, 3674 Expr *Init, 3675 SourceLocation IdLoc); 3676 3677 MemInitResult BuildBaseInitializer(QualType BaseType, 3678 TypeSourceInfo *BaseTInfo, 3679 Expr *Init, 3680 CXXRecordDecl *ClassDecl, 3681 SourceLocation EllipsisLoc); 3682 3683 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3684 Expr *Init, 3685 CXXRecordDecl *ClassDecl); 3686 3687 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3688 CXXCtorInitializer *Initializer); 3689 3690 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3691 CXXCtorInitializer **Initializers, 3692 unsigned NumInitializers, bool AnyErrors); 3693 3694 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3695 3696 3697 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3698 /// mark all the non-trivial destructors of its members and bases as 3699 /// referenced. 3700 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3701 CXXRecordDecl *Record); 3702 3703 /// \brief The list of classes whose vtables have been used within 3704 /// this translation unit, and the source locations at which the 3705 /// first use occurred. 3706 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3707 3708 /// \brief The list of vtables that are required but have not yet been 3709 /// materialized. 3710 SmallVector<VTableUse, 16> VTableUses; 3711 3712 /// \brief The set of classes whose vtables have been used within 3713 /// this translation unit, and a bit that will be true if the vtable is 3714 /// required to be emitted (otherwise, it should be emitted only if needed 3715 /// by code generation). 3716 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3717 3718 /// \brief Load any externally-stored vtable uses. 3719 void LoadExternalVTableUses(); 3720 3721 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 3722 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 3723 DynamicClassesType; 3724 3725 /// \brief A list of all of the dynamic classes in this translation 3726 /// unit. 3727 DynamicClassesType DynamicClasses; 3728 3729 /// \brief Note that the vtable for the given class was used at the 3730 /// given location. 3731 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3732 bool DefinitionRequired = false); 3733 3734 /// MarkVirtualMembersReferenced - Will mark all members of the given 3735 /// CXXRecordDecl referenced. 3736 void MarkVirtualMembersReferenced(SourceLocation Loc, 3737 const CXXRecordDecl *RD); 3738 3739 /// \brief Define all of the vtables that have been used in this 3740 /// translation unit and reference any virtual members used by those 3741 /// vtables. 3742 /// 3743 /// \returns true if any work was done, false otherwise. 3744 bool DefineUsedVTables(); 3745 3746 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3747 3748 void ActOnMemInitializers(Decl *ConstructorDecl, 3749 SourceLocation ColonLoc, 3750 CXXCtorInitializer **MemInits, 3751 unsigned NumMemInits, 3752 bool AnyErrors); 3753 3754 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3755 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3756 Decl *TagDecl, 3757 SourceLocation LBrac, 3758 SourceLocation RBrac, 3759 AttributeList *AttrList); 3760 3761 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3762 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3763 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3764 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3765 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3766 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3767 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3768 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3769 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3770 bool IsInsideALocalClassWithinATemplateFunction(); 3771 3772 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3773 Expr *AssertExpr, 3774 Expr *AssertMessageExpr, 3775 SourceLocation RParenLoc); 3776 3777 FriendDecl *CheckFriendTypeDecl(SourceLocation Loc, 3778 SourceLocation FriendLoc, 3779 TypeSourceInfo *TSInfo); 3780 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3781 MultiTemplateParamsArg TemplateParams); 3782 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, 3783 MultiTemplateParamsArg TemplateParams); 3784 3785 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3786 StorageClass& SC); 3787 void CheckConstructor(CXXConstructorDecl *Constructor); 3788 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3789 StorageClass& SC); 3790 bool CheckDestructor(CXXDestructorDecl *Destructor); 3791 void CheckConversionDeclarator(Declarator &D, QualType &R, 3792 StorageClass& SC); 3793 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3794 3795 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3796 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3797 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3798 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3799 void CheckExplicitlyDefaultedMoveConstructor(CXXConstructorDecl *Ctor); 3800 void CheckExplicitlyDefaultedMoveAssignment(CXXMethodDecl *Method); 3801 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3802 3803 //===--------------------------------------------------------------------===// 3804 // C++ Derived Classes 3805 // 3806 3807 /// ActOnBaseSpecifier - Parsed a base specifier 3808 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3809 SourceRange SpecifierRange, 3810 bool Virtual, AccessSpecifier Access, 3811 TypeSourceInfo *TInfo, 3812 SourceLocation EllipsisLoc); 3813 3814 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3815 SourceRange SpecifierRange, 3816 bool Virtual, AccessSpecifier Access, 3817 ParsedType basetype, 3818 SourceLocation BaseLoc, 3819 SourceLocation EllipsisLoc); 3820 3821 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3822 unsigned NumBases); 3823 void ActOnBaseSpecifiers(Decl *ClassDecl, CXXBaseSpecifier **Bases, 3824 unsigned NumBases); 3825 3826 bool IsDerivedFrom(QualType Derived, QualType Base); 3827 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3828 3829 // FIXME: I don't like this name. 3830 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3831 3832 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3833 3834 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3835 SourceLocation Loc, SourceRange Range, 3836 CXXCastPath *BasePath = 0, 3837 bool IgnoreAccess = false); 3838 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3839 unsigned InaccessibleBaseID, 3840 unsigned AmbigiousBaseConvID, 3841 SourceLocation Loc, SourceRange Range, 3842 DeclarationName Name, 3843 CXXCastPath *BasePath); 3844 3845 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3846 3847 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3848 /// covariant, according to C++ [class.virtual]p5. 3849 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3850 const CXXMethodDecl *Old); 3851 3852 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3853 /// spec is a subset of base spec. 3854 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3855 const CXXMethodDecl *Old); 3856 3857 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3858 3859 /// CheckOverrideControl - Check C++0x override control semantics. 3860 void CheckOverrideControl(const Decl *D); 3861 3862 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3863 /// overrides a virtual member function marked 'final', according to 3864 /// C++0x [class.virtual]p3. 3865 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3866 const CXXMethodDecl *Old); 3867 3868 3869 //===--------------------------------------------------------------------===// 3870 // C++ Access Control 3871 // 3872 3873 enum AccessResult { 3874 AR_accessible, 3875 AR_inaccessible, 3876 AR_dependent, 3877 AR_delayed 3878 }; 3879 3880 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3881 NamedDecl *PrevMemberDecl, 3882 AccessSpecifier LexicalAS); 3883 3884 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3885 DeclAccessPair FoundDecl); 3886 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3887 DeclAccessPair FoundDecl); 3888 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3889 SourceRange PlacementRange, 3890 CXXRecordDecl *NamingClass, 3891 DeclAccessPair FoundDecl, 3892 bool Diagnose = true); 3893 AccessResult CheckConstructorAccess(SourceLocation Loc, 3894 CXXConstructorDecl *D, 3895 const InitializedEntity &Entity, 3896 AccessSpecifier Access, 3897 bool IsCopyBindingRefToTemp = false); 3898 AccessResult CheckConstructorAccess(SourceLocation Loc, 3899 CXXConstructorDecl *D, 3900 AccessSpecifier Access, 3901 PartialDiagnostic PD); 3902 AccessResult CheckDestructorAccess(SourceLocation Loc, 3903 CXXDestructorDecl *Dtor, 3904 const PartialDiagnostic &PDiag); 3905 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3906 NamedDecl *D, 3907 const PartialDiagnostic &PDiag); 3908 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3909 Expr *ObjectExpr, 3910 Expr *ArgExpr, 3911 DeclAccessPair FoundDecl); 3912 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3913 DeclAccessPair FoundDecl); 3914 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3915 QualType Base, QualType Derived, 3916 const CXXBasePath &Path, 3917 unsigned DiagID, 3918 bool ForceCheck = false, 3919 bool ForceUnprivileged = false); 3920 void CheckLookupAccess(const LookupResult &R); 3921 bool IsSimplyAccessible(NamedDecl *decl, DeclContext *Ctx); 3922 3923 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3924 const MultiLevelTemplateArgumentList &TemplateArgs); 3925 void PerformDependentDiagnostics(const DeclContext *Pattern, 3926 const MultiLevelTemplateArgumentList &TemplateArgs); 3927 3928 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3929 3930 /// A flag to suppress access checking. 3931 bool SuppressAccessChecking; 3932 3933 /// \brief When true, access checking violations are treated as SFINAE 3934 /// failures rather than hard errors. 3935 bool AccessCheckingSFINAE; 3936 3937 void ActOnStartSuppressingAccessChecks(); 3938 void ActOnStopSuppressingAccessChecks(); 3939 3940 enum AbstractDiagSelID { 3941 AbstractNone = -1, 3942 AbstractReturnType, 3943 AbstractParamType, 3944 AbstractVariableType, 3945 AbstractFieldType, 3946 AbstractArrayType 3947 }; 3948 3949 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3950 const PartialDiagnostic &PD); 3951 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3952 3953 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3954 AbstractDiagSelID SelID = AbstractNone); 3955 3956 //===--------------------------------------------------------------------===// 3957 // C++ Overloaded Operators [C++ 13.5] 3958 // 3959 3960 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3961 3962 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3963 3964 //===--------------------------------------------------------------------===// 3965 // C++ Templates [C++ 14] 3966 // 3967 void FilterAcceptableTemplateNames(LookupResult &R); 3968 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3969 3970 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3971 QualType ObjectType, bool EnteringContext, 3972 bool &MemberOfUnknownSpecialization); 3973 3974 TemplateNameKind isTemplateName(Scope *S, 3975 CXXScopeSpec &SS, 3976 bool hasTemplateKeyword, 3977 UnqualifiedId &Name, 3978 ParsedType ObjectType, 3979 bool EnteringContext, 3980 TemplateTy &Template, 3981 bool &MemberOfUnknownSpecialization); 3982 3983 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3984 SourceLocation IILoc, 3985 Scope *S, 3986 const CXXScopeSpec *SS, 3987 TemplateTy &SuggestedTemplate, 3988 TemplateNameKind &SuggestedKind); 3989 3990 void DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3991 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3992 3993 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3994 SourceLocation EllipsisLoc, 3995 SourceLocation KeyLoc, 3996 IdentifierInfo *ParamName, 3997 SourceLocation ParamNameLoc, 3998 unsigned Depth, unsigned Position, 3999 SourceLocation EqualLoc, 4000 ParsedType DefaultArg); 4001 4002 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 4003 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 4004 unsigned Depth, 4005 unsigned Position, 4006 SourceLocation EqualLoc, 4007 Expr *DefaultArg); 4008 Decl *ActOnTemplateTemplateParameter(Scope *S, 4009 SourceLocation TmpLoc, 4010 TemplateParameterList *Params, 4011 SourceLocation EllipsisLoc, 4012 IdentifierInfo *ParamName, 4013 SourceLocation ParamNameLoc, 4014 unsigned Depth, 4015 unsigned Position, 4016 SourceLocation EqualLoc, 4017 ParsedTemplateArgument DefaultArg); 4018 4019 TemplateParameterList * 4020 ActOnTemplateParameterList(unsigned Depth, 4021 SourceLocation ExportLoc, 4022 SourceLocation TemplateLoc, 4023 SourceLocation LAngleLoc, 4024 Decl **Params, unsigned NumParams, 4025 SourceLocation RAngleLoc); 4026 4027 /// \brief The context in which we are checking a template parameter 4028 /// list. 4029 enum TemplateParamListContext { 4030 TPC_ClassTemplate, 4031 TPC_FunctionTemplate, 4032 TPC_ClassTemplateMember, 4033 TPC_FriendFunctionTemplate, 4034 TPC_FriendFunctionTemplateDefinition, 4035 TPC_TypeAliasTemplate 4036 }; 4037 4038 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 4039 TemplateParameterList *OldParams, 4040 TemplateParamListContext TPC); 4041 TemplateParameterList * 4042 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 4043 SourceLocation DeclLoc, 4044 const CXXScopeSpec &SS, 4045 TemplateParameterList **ParamLists, 4046 unsigned NumParamLists, 4047 bool IsFriend, 4048 bool &IsExplicitSpecialization, 4049 bool &Invalid); 4050 4051 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 4052 SourceLocation KWLoc, CXXScopeSpec &SS, 4053 IdentifierInfo *Name, SourceLocation NameLoc, 4054 AttributeList *Attr, 4055 TemplateParameterList *TemplateParams, 4056 AccessSpecifier AS, 4057 SourceLocation ModulePrivateLoc, 4058 unsigned NumOuterTemplateParamLists, 4059 TemplateParameterList **OuterTemplateParamLists); 4060 4061 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 4062 TemplateArgumentListInfo &Out); 4063 4064 void NoteAllFoundTemplates(TemplateName Name); 4065 4066 QualType CheckTemplateIdType(TemplateName Template, 4067 SourceLocation TemplateLoc, 4068 TemplateArgumentListInfo &TemplateArgs); 4069 4070 TypeResult 4071 ActOnTemplateIdType(CXXScopeSpec &SS, SourceLocation TemplateKWLoc, 4072 TemplateTy Template, SourceLocation TemplateLoc, 4073 SourceLocation LAngleLoc, 4074 ASTTemplateArgsPtr TemplateArgs, 4075 SourceLocation RAngleLoc, 4076 bool IsCtorOrDtorName = false); 4077 4078 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 4079 /// such as \c class T::template apply<U>. 4080 /// 4081 /// \param TUK 4082 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 4083 TypeSpecifierType TagSpec, 4084 SourceLocation TagLoc, 4085 CXXScopeSpec &SS, 4086 SourceLocation TemplateKWLoc, 4087 TemplateTy TemplateD, 4088 SourceLocation TemplateLoc, 4089 SourceLocation LAngleLoc, 4090 ASTTemplateArgsPtr TemplateArgsIn, 4091 SourceLocation RAngleLoc); 4092 4093 4094 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 4095 SourceLocation TemplateKWLoc, 4096 LookupResult &R, 4097 bool RequiresADL, 4098 const TemplateArgumentListInfo *TemplateArgs); 4099 4100 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 4101 SourceLocation TemplateKWLoc, 4102 const DeclarationNameInfo &NameInfo, 4103 const TemplateArgumentListInfo *TemplateArgs); 4104 4105 TemplateNameKind ActOnDependentTemplateName(Scope *S, 4106 CXXScopeSpec &SS, 4107 SourceLocation TemplateKWLoc, 4108 UnqualifiedId &Name, 4109 ParsedType ObjectType, 4110 bool EnteringContext, 4111 TemplateTy &Template); 4112 4113 DeclResult 4114 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 4115 SourceLocation KWLoc, 4116 SourceLocation ModulePrivateLoc, 4117 CXXScopeSpec &SS, 4118 TemplateTy Template, 4119 SourceLocation TemplateNameLoc, 4120 SourceLocation LAngleLoc, 4121 ASTTemplateArgsPtr TemplateArgs, 4122 SourceLocation RAngleLoc, 4123 AttributeList *Attr, 4124 MultiTemplateParamsArg TemplateParameterLists); 4125 4126 Decl *ActOnTemplateDeclarator(Scope *S, 4127 MultiTemplateParamsArg TemplateParameterLists, 4128 Declarator &D); 4129 4130 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 4131 MultiTemplateParamsArg TemplateParameterLists, 4132 Declarator &D); 4133 4134 bool 4135 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 4136 TemplateSpecializationKind NewTSK, 4137 NamedDecl *PrevDecl, 4138 TemplateSpecializationKind PrevTSK, 4139 SourceLocation PrevPtOfInstantiation, 4140 bool &SuppressNew); 4141 4142 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 4143 const TemplateArgumentListInfo &ExplicitTemplateArgs, 4144 LookupResult &Previous); 4145 4146 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 4147 TemplateArgumentListInfo *ExplicitTemplateArgs, 4148 LookupResult &Previous); 4149 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 4150 4151 DeclResult 4152 ActOnExplicitInstantiation(Scope *S, 4153 SourceLocation ExternLoc, 4154 SourceLocation TemplateLoc, 4155 unsigned TagSpec, 4156 SourceLocation KWLoc, 4157 const CXXScopeSpec &SS, 4158 TemplateTy Template, 4159 SourceLocation TemplateNameLoc, 4160 SourceLocation LAngleLoc, 4161 ASTTemplateArgsPtr TemplateArgs, 4162 SourceLocation RAngleLoc, 4163 AttributeList *Attr); 4164 4165 DeclResult 4166 ActOnExplicitInstantiation(Scope *S, 4167 SourceLocation ExternLoc, 4168 SourceLocation TemplateLoc, 4169 unsigned TagSpec, 4170 SourceLocation KWLoc, 4171 CXXScopeSpec &SS, 4172 IdentifierInfo *Name, 4173 SourceLocation NameLoc, 4174 AttributeList *Attr); 4175 4176 DeclResult ActOnExplicitInstantiation(Scope *S, 4177 SourceLocation ExternLoc, 4178 SourceLocation TemplateLoc, 4179 Declarator &D); 4180 4181 TemplateArgumentLoc 4182 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 4183 SourceLocation TemplateLoc, 4184 SourceLocation RAngleLoc, 4185 Decl *Param, 4186 SmallVectorImpl<TemplateArgument> &Converted); 4187 4188 /// \brief Specifies the context in which a particular template 4189 /// argument is being checked. 4190 enum CheckTemplateArgumentKind { 4191 /// \brief The template argument was specified in the code or was 4192 /// instantiated with some deduced template arguments. 4193 CTAK_Specified, 4194 4195 /// \brief The template argument was deduced via template argument 4196 /// deduction. 4197 CTAK_Deduced, 4198 4199 /// \brief The template argument was deduced from an array bound 4200 /// via template argument deduction. 4201 CTAK_DeducedFromArrayBound 4202 }; 4203 4204 bool CheckTemplateArgument(NamedDecl *Param, 4205 const TemplateArgumentLoc &Arg, 4206 NamedDecl *Template, 4207 SourceLocation TemplateLoc, 4208 SourceLocation RAngleLoc, 4209 unsigned ArgumentPackIndex, 4210 SmallVectorImpl<TemplateArgument> &Converted, 4211 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4212 4213 /// \brief Check that the given template arguments can be be provided to 4214 /// the given template, converting the arguments along the way. 4215 /// 4216 /// \param Template The template to which the template arguments are being 4217 /// provided. 4218 /// 4219 /// \param TemplateLoc The location of the template name in the source. 4220 /// 4221 /// \param TemplateArgs The list of template arguments. If the template is 4222 /// a template template parameter, this function may extend the set of 4223 /// template arguments to also include substituted, defaulted template 4224 /// arguments. 4225 /// 4226 /// \param PartialTemplateArgs True if the list of template arguments is 4227 /// intentionally partial, e.g., because we're checking just the initial 4228 /// set of template arguments. 4229 /// 4230 /// \param Converted Will receive the converted, canonicalized template 4231 /// arguments. 4232 /// 4233 /// 4234 /// \param ExpansionIntoFixedList If non-NULL, will be set true to indicate 4235 /// when the template arguments contain a pack expansion that is being 4236 /// expanded into a fixed parameter list. 4237 /// 4238 /// \returns True if an error occurred, false otherwise. 4239 bool CheckTemplateArgumentList(TemplateDecl *Template, 4240 SourceLocation TemplateLoc, 4241 TemplateArgumentListInfo &TemplateArgs, 4242 bool PartialTemplateArgs, 4243 SmallVectorImpl<TemplateArgument> &Converted, 4244 bool *ExpansionIntoFixedList = 0); 4245 4246 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 4247 const TemplateArgumentLoc &Arg, 4248 SmallVectorImpl<TemplateArgument> &Converted); 4249 4250 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 4251 TypeSourceInfo *Arg); 4252 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 4253 TemplateArgument &Converted); 4254 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 4255 QualType InstantiatedParamType, Expr *Arg, 4256 TemplateArgument &Converted, 4257 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4258 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 4259 const TemplateArgumentLoc &Arg); 4260 4261 ExprResult 4262 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 4263 QualType ParamType, 4264 SourceLocation Loc); 4265 ExprResult 4266 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 4267 SourceLocation Loc); 4268 4269 /// \brief Enumeration describing how template parameter lists are compared 4270 /// for equality. 4271 enum TemplateParameterListEqualKind { 4272 /// \brief We are matching the template parameter lists of two templates 4273 /// that might be redeclarations. 4274 /// 4275 /// \code 4276 /// template<typename T> struct X; 4277 /// template<typename T> struct X; 4278 /// \endcode 4279 TPL_TemplateMatch, 4280 4281 /// \brief We are matching the template parameter lists of two template 4282 /// template parameters as part of matching the template parameter lists 4283 /// of two templates that might be redeclarations. 4284 /// 4285 /// \code 4286 /// template<template<int I> class TT> struct X; 4287 /// template<template<int Value> class Other> struct X; 4288 /// \endcode 4289 TPL_TemplateTemplateParmMatch, 4290 4291 /// \brief We are matching the template parameter lists of a template 4292 /// template argument against the template parameter lists of a template 4293 /// template parameter. 4294 /// 4295 /// \code 4296 /// template<template<int Value> class Metafun> struct X; 4297 /// template<int Value> struct integer_c; 4298 /// X<integer_c> xic; 4299 /// \endcode 4300 TPL_TemplateTemplateArgumentMatch 4301 }; 4302 4303 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 4304 TemplateParameterList *Old, 4305 bool Complain, 4306 TemplateParameterListEqualKind Kind, 4307 SourceLocation TemplateArgLoc 4308 = SourceLocation()); 4309 4310 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 4311 4312 /// \brief Called when the parser has parsed a C++ typename 4313 /// specifier, e.g., "typename T::type". 4314 /// 4315 /// \param S The scope in which this typename type occurs. 4316 /// \param TypenameLoc the location of the 'typename' keyword 4317 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4318 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 4319 /// \param IdLoc the location of the identifier. 4320 TypeResult 4321 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4322 const CXXScopeSpec &SS, const IdentifierInfo &II, 4323 SourceLocation IdLoc); 4324 4325 /// \brief Called when the parser has parsed a C++ typename 4326 /// specifier that ends in a template-id, e.g., 4327 /// "typename MetaFun::template apply<T1, T2>". 4328 /// 4329 /// \param S The scope in which this typename type occurs. 4330 /// \param TypenameLoc the location of the 'typename' keyword 4331 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4332 /// \param TemplateLoc the location of the 'template' keyword, if any. 4333 /// \param TemplateName The template name. 4334 /// \param TemplateNameLoc The location of the template name. 4335 /// \param LAngleLoc The location of the opening angle bracket ('<'). 4336 /// \param TemplateArgs The template arguments. 4337 /// \param RAngleLoc The location of the closing angle bracket ('>'). 4338 TypeResult 4339 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4340 const CXXScopeSpec &SS, 4341 SourceLocation TemplateLoc, 4342 TemplateTy Template, 4343 SourceLocation TemplateNameLoc, 4344 SourceLocation LAngleLoc, 4345 ASTTemplateArgsPtr TemplateArgs, 4346 SourceLocation RAngleLoc); 4347 4348 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 4349 SourceLocation KeywordLoc, 4350 NestedNameSpecifierLoc QualifierLoc, 4351 const IdentifierInfo &II, 4352 SourceLocation IILoc); 4353 4354 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 4355 SourceLocation Loc, 4356 DeclarationName Name); 4357 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 4358 4359 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 4360 bool RebuildTemplateParamsInCurrentInstantiation( 4361 TemplateParameterList *Params); 4362 4363 std::string 4364 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4365 const TemplateArgumentList &Args); 4366 4367 std::string 4368 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4369 const TemplateArgument *Args, 4370 unsigned NumArgs); 4371 4372 //===--------------------------------------------------------------------===// 4373 // C++ Variadic Templates (C++0x [temp.variadic]) 4374 //===--------------------------------------------------------------------===// 4375 4376 /// \brief The context in which an unexpanded parameter pack is 4377 /// being diagnosed. 4378 /// 4379 /// Note that the values of this enumeration line up with the first 4380 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4381 enum UnexpandedParameterPackContext { 4382 /// \brief An arbitrary expression. 4383 UPPC_Expression = 0, 4384 4385 /// \brief The base type of a class type. 4386 UPPC_BaseType, 4387 4388 /// \brief The type of an arbitrary declaration. 4389 UPPC_DeclarationType, 4390 4391 /// \brief The type of a data member. 4392 UPPC_DataMemberType, 4393 4394 /// \brief The size of a bit-field. 4395 UPPC_BitFieldWidth, 4396 4397 /// \brief The expression in a static assertion. 4398 UPPC_StaticAssertExpression, 4399 4400 /// \brief The fixed underlying type of an enumeration. 4401 UPPC_FixedUnderlyingType, 4402 4403 /// \brief The enumerator value. 4404 UPPC_EnumeratorValue, 4405 4406 /// \brief A using declaration. 4407 UPPC_UsingDeclaration, 4408 4409 /// \brief A friend declaration. 4410 UPPC_FriendDeclaration, 4411 4412 /// \brief A declaration qualifier. 4413 UPPC_DeclarationQualifier, 4414 4415 /// \brief An initializer. 4416 UPPC_Initializer, 4417 4418 /// \brief A default argument. 4419 UPPC_DefaultArgument, 4420 4421 /// \brief The type of a non-type template parameter. 4422 UPPC_NonTypeTemplateParameterType, 4423 4424 /// \brief The type of an exception. 4425 UPPC_ExceptionType, 4426 4427 /// \brief Partial specialization. 4428 UPPC_PartialSpecialization, 4429 4430 /// \brief Microsoft __if_exists. 4431 UPPC_IfExists, 4432 4433 /// \brief Microsoft __if_not_exists. 4434 UPPC_IfNotExists 4435}; 4436 4437 /// \brief Diagnose unexpanded parameter packs. 4438 /// 4439 /// \param Loc The location at which we should emit the diagnostic. 4440 /// 4441 /// \param UPPC The context in which we are diagnosing unexpanded 4442 /// parameter packs. 4443 /// 4444 /// \param Unexpanded the set of unexpanded parameter packs. 4445 void DiagnoseUnexpandedParameterPacks(SourceLocation Loc, 4446 UnexpandedParameterPackContext UPPC, 4447 const SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4448 4449 /// \brief If the given type contains an unexpanded parameter pack, 4450 /// diagnose the error. 4451 /// 4452 /// \param Loc The source location where a diagnostc should be emitted. 4453 /// 4454 /// \param T The type that is being checked for unexpanded parameter 4455 /// packs. 4456 /// 4457 /// \returns true if an error occurred, false otherwise. 4458 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4459 UnexpandedParameterPackContext UPPC); 4460 4461 /// \brief If the given expression contains an unexpanded parameter 4462 /// pack, diagnose the error. 4463 /// 4464 /// \param E The expression that is being checked for unexpanded 4465 /// parameter packs. 4466 /// 4467 /// \returns true if an error occurred, false otherwise. 4468 bool DiagnoseUnexpandedParameterPack(Expr *E, 4469 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4470 4471 /// \brief If the given nested-name-specifier contains an unexpanded 4472 /// parameter pack, diagnose the error. 4473 /// 4474 /// \param SS The nested-name-specifier that is being checked for 4475 /// unexpanded parameter packs. 4476 /// 4477 /// \returns true if an error occurred, false otherwise. 4478 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4479 UnexpandedParameterPackContext UPPC); 4480 4481 /// \brief If the given name contains an unexpanded parameter pack, 4482 /// diagnose the error. 4483 /// 4484 /// \param NameInfo The name (with source location information) that 4485 /// is being checked for unexpanded parameter packs. 4486 /// 4487 /// \returns true if an error occurred, false otherwise. 4488 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4489 UnexpandedParameterPackContext UPPC); 4490 4491 /// \brief If the given template name contains an unexpanded parameter pack, 4492 /// diagnose the error. 4493 /// 4494 /// \param Loc The location of the template name. 4495 /// 4496 /// \param Template The template name that is being checked for unexpanded 4497 /// parameter packs. 4498 /// 4499 /// \returns true if an error occurred, false otherwise. 4500 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4501 TemplateName Template, 4502 UnexpandedParameterPackContext UPPC); 4503 4504 /// \brief If the given template argument contains an unexpanded parameter 4505 /// pack, diagnose the error. 4506 /// 4507 /// \param Arg The template argument that is being checked for unexpanded 4508 /// parameter packs. 4509 /// 4510 /// \returns true if an error occurred, false otherwise. 4511 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4512 UnexpandedParameterPackContext UPPC); 4513 4514 /// \brief Collect the set of unexpanded parameter packs within the given 4515 /// template argument. 4516 /// 4517 /// \param Arg The template argument that will be traversed to find 4518 /// unexpanded parameter packs. 4519 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4520 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4521 4522 /// \brief Collect the set of unexpanded parameter packs within the given 4523 /// template argument. 4524 /// 4525 /// \param Arg The template argument that will be traversed to find 4526 /// unexpanded parameter packs. 4527 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4528 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4529 4530 /// \brief Collect the set of unexpanded parameter packs within the given 4531 /// type. 4532 /// 4533 /// \param T The type that will be traversed to find 4534 /// unexpanded parameter packs. 4535 void collectUnexpandedParameterPacks(QualType T, 4536 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4537 4538 /// \brief Collect the set of unexpanded parameter packs within the given 4539 /// type. 4540 /// 4541 /// \param TL The type that will be traversed to find 4542 /// unexpanded parameter packs. 4543 void collectUnexpandedParameterPacks(TypeLoc TL, 4544 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4545 4546 /// \brief Collect the set of unexpanded parameter packs within the given 4547 /// nested-name-specifier. 4548 /// 4549 /// \param SS The nested-name-specifier that will be traversed to find 4550 /// unexpanded parameter packs. 4551 void collectUnexpandedParameterPacks(CXXScopeSpec &SS, 4552 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4553 4554 /// \brief Collect the set of unexpanded parameter packs within the given 4555 /// name. 4556 /// 4557 /// \param NameInfo The name that will be traversed to find 4558 /// unexpanded parameter packs. 4559 void collectUnexpandedParameterPacks(const DeclarationNameInfo &NameInfo, 4560 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4561 4562 /// \brief Invoked when parsing a template argument followed by an 4563 /// ellipsis, which creates a pack expansion. 4564 /// 4565 /// \param Arg The template argument preceding the ellipsis, which 4566 /// may already be invalid. 4567 /// 4568 /// \param EllipsisLoc The location of the ellipsis. 4569 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4570 SourceLocation EllipsisLoc); 4571 4572 /// \brief Invoked when parsing a type followed by an ellipsis, which 4573 /// creates a pack expansion. 4574 /// 4575 /// \param Type The type preceding the ellipsis, which will become 4576 /// the pattern of the pack expansion. 4577 /// 4578 /// \param EllipsisLoc The location of the ellipsis. 4579 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4580 4581 /// \brief Construct a pack expansion type from the pattern of the pack 4582 /// expansion. 4583 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4584 SourceLocation EllipsisLoc, 4585 llvm::Optional<unsigned> NumExpansions); 4586 4587 /// \brief Construct a pack expansion type from the pattern of the pack 4588 /// expansion. 4589 QualType CheckPackExpansion(QualType Pattern, 4590 SourceRange PatternRange, 4591 SourceLocation EllipsisLoc, 4592 llvm::Optional<unsigned> NumExpansions); 4593 4594 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4595 /// creates a pack expansion. 4596 /// 4597 /// \param Pattern The expression preceding the ellipsis, which will become 4598 /// the pattern of the pack expansion. 4599 /// 4600 /// \param EllipsisLoc The location of the ellipsis. 4601 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4602 4603 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4604 /// creates a pack expansion. 4605 /// 4606 /// \param Pattern The expression preceding the ellipsis, which will become 4607 /// the pattern of the pack expansion. 4608 /// 4609 /// \param EllipsisLoc The location of the ellipsis. 4610 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4611 llvm::Optional<unsigned> NumExpansions); 4612 4613 /// \brief Determine whether we could expand a pack expansion with the 4614 /// given set of parameter packs into separate arguments by repeatedly 4615 /// transforming the pattern. 4616 /// 4617 /// \param EllipsisLoc The location of the ellipsis that identifies the 4618 /// pack expansion. 4619 /// 4620 /// \param PatternRange The source range that covers the entire pattern of 4621 /// the pack expansion. 4622 /// 4623 /// \param Unexpanded The set of unexpanded parameter packs within the 4624 /// pattern. 4625 /// 4626 /// \param NumUnexpanded The number of unexpanded parameter packs in 4627 /// \p Unexpanded. 4628 /// 4629 /// \param ShouldExpand Will be set to \c true if the transformer should 4630 /// expand the corresponding pack expansions into separate arguments. When 4631 /// set, \c NumExpansions must also be set. 4632 /// 4633 /// \param RetainExpansion Whether the caller should add an unexpanded 4634 /// pack expansion after all of the expanded arguments. This is used 4635 /// when extending explicitly-specified template argument packs per 4636 /// C++0x [temp.arg.explicit]p9. 4637 /// 4638 /// \param NumExpansions The number of separate arguments that will be in 4639 /// the expanded form of the corresponding pack expansion. This is both an 4640 /// input and an output parameter, which can be set by the caller if the 4641 /// number of expansions is known a priori (e.g., due to a prior substitution) 4642 /// and will be set by the callee when the number of expansions is known. 4643 /// The callee must set this value when \c ShouldExpand is \c true; it may 4644 /// set this value in other cases. 4645 /// 4646 /// \returns true if an error occurred (e.g., because the parameter packs 4647 /// are to be instantiated with arguments of different lengths), false 4648 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4649 /// must be set. 4650 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4651 SourceRange PatternRange, 4652 llvm::ArrayRef<UnexpandedParameterPack> Unexpanded, 4653 const MultiLevelTemplateArgumentList &TemplateArgs, 4654 bool &ShouldExpand, 4655 bool &RetainExpansion, 4656 llvm::Optional<unsigned> &NumExpansions); 4657 4658 /// \brief Determine the number of arguments in the given pack expansion 4659 /// type. 4660 /// 4661 /// This routine already assumes that the pack expansion type can be 4662 /// expanded and that the number of arguments in the expansion is 4663 /// consistent across all of the unexpanded parameter packs in its pattern. 4664 unsigned getNumArgumentsInExpansion(QualType T, 4665 const MultiLevelTemplateArgumentList &TemplateArgs); 4666 4667 /// \brief Determine whether the given declarator contains any unexpanded 4668 /// parameter packs. 4669 /// 4670 /// This routine is used by the parser to disambiguate function declarators 4671 /// with an ellipsis prior to the ')', e.g., 4672 /// 4673 /// \code 4674 /// void f(T...); 4675 /// \endcode 4676 /// 4677 /// To determine whether we have an (unnamed) function parameter pack or 4678 /// a variadic function. 4679 /// 4680 /// \returns true if the declarator contains any unexpanded parameter packs, 4681 /// false otherwise. 4682 bool containsUnexpandedParameterPacks(Declarator &D); 4683 4684 //===--------------------------------------------------------------------===// 4685 // C++ Template Argument Deduction (C++ [temp.deduct]) 4686 //===--------------------------------------------------------------------===// 4687 4688 /// \brief Describes the result of template argument deduction. 4689 /// 4690 /// The TemplateDeductionResult enumeration describes the result of 4691 /// template argument deduction, as returned from 4692 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4693 /// structure provides additional information about the results of 4694 /// template argument deduction, e.g., the deduced template argument 4695 /// list (if successful) or the specific template parameters or 4696 /// deduced arguments that were involved in the failure. 4697 enum TemplateDeductionResult { 4698 /// \brief Template argument deduction was successful. 4699 TDK_Success = 0, 4700 /// \brief Template argument deduction exceeded the maximum template 4701 /// instantiation depth (which has already been diagnosed). 4702 TDK_InstantiationDepth, 4703 /// \brief Template argument deduction did not deduce a value 4704 /// for every template parameter. 4705 TDK_Incomplete, 4706 /// \brief Template argument deduction produced inconsistent 4707 /// deduced values for the given template parameter. 4708 TDK_Inconsistent, 4709 /// \brief Template argument deduction failed due to inconsistent 4710 /// cv-qualifiers on a template parameter type that would 4711 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4712 /// but were given a non-const "X". 4713 TDK_Underqualified, 4714 /// \brief Substitution of the deduced template argument values 4715 /// resulted in an error. 4716 TDK_SubstitutionFailure, 4717 /// \brief Substitution of the deduced template argument values 4718 /// into a non-deduced context produced a type or value that 4719 /// produces a type that does not match the original template 4720 /// arguments provided. 4721 TDK_NonDeducedMismatch, 4722 /// \brief When performing template argument deduction for a function 4723 /// template, there were too many call arguments. 4724 TDK_TooManyArguments, 4725 /// \brief When performing template argument deduction for a function 4726 /// template, there were too few call arguments. 4727 TDK_TooFewArguments, 4728 /// \brief The explicitly-specified template arguments were not valid 4729 /// template arguments for the given template. 4730 TDK_InvalidExplicitArguments, 4731 /// \brief The arguments included an overloaded function name that could 4732 /// not be resolved to a suitable function. 4733 TDK_FailedOverloadResolution 4734 }; 4735 4736 TemplateDeductionResult 4737 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4738 const TemplateArgumentList &TemplateArgs, 4739 sema::TemplateDeductionInfo &Info); 4740 4741 TemplateDeductionResult 4742 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4743 TemplateArgumentListInfo &ExplicitTemplateArgs, 4744 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4745 SmallVectorImpl<QualType> &ParamTypes, 4746 QualType *FunctionType, 4747 sema::TemplateDeductionInfo &Info); 4748 4749 /// brief A function argument from which we performed template argument 4750 // deduction for a call. 4751 struct OriginalCallArg { 4752 OriginalCallArg(QualType OriginalParamType, 4753 unsigned ArgIdx, 4754 QualType OriginalArgType) 4755 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4756 OriginalArgType(OriginalArgType) { } 4757 4758 QualType OriginalParamType; 4759 unsigned ArgIdx; 4760 QualType OriginalArgType; 4761 }; 4762 4763 TemplateDeductionResult 4764 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4765 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4766 unsigned NumExplicitlySpecified, 4767 FunctionDecl *&Specialization, 4768 sema::TemplateDeductionInfo &Info, 4769 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4770 4771 TemplateDeductionResult 4772 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4773 TemplateArgumentListInfo *ExplicitTemplateArgs, 4774 Expr **Args, unsigned NumArgs, 4775 FunctionDecl *&Specialization, 4776 sema::TemplateDeductionInfo &Info); 4777 4778 TemplateDeductionResult 4779 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4780 TemplateArgumentListInfo *ExplicitTemplateArgs, 4781 QualType ArgFunctionType, 4782 FunctionDecl *&Specialization, 4783 sema::TemplateDeductionInfo &Info); 4784 4785 TemplateDeductionResult 4786 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4787 QualType ToType, 4788 CXXConversionDecl *&Specialization, 4789 sema::TemplateDeductionInfo &Info); 4790 4791 TemplateDeductionResult 4792 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4793 TemplateArgumentListInfo *ExplicitTemplateArgs, 4794 FunctionDecl *&Specialization, 4795 sema::TemplateDeductionInfo &Info); 4796 4797 /// \brief Result type of DeduceAutoType. 4798 enum DeduceAutoResult { 4799 DAR_Succeeded, 4800 DAR_Failed, 4801 DAR_FailedAlreadyDiagnosed 4802 }; 4803 4804 DeduceAutoResult DeduceAutoType(TypeSourceInfo *AutoType, Expr *&Initializer, 4805 TypeSourceInfo *&Result); 4806 void DiagnoseAutoDeductionFailure(VarDecl *VDecl, Expr *Init); 4807 4808 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4809 FunctionTemplateDecl *FT2, 4810 SourceLocation Loc, 4811 TemplatePartialOrderingContext TPOC, 4812 unsigned NumCallArguments); 4813 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4814 UnresolvedSetIterator SEnd, 4815 TemplatePartialOrderingContext TPOC, 4816 unsigned NumCallArguments, 4817 SourceLocation Loc, 4818 const PartialDiagnostic &NoneDiag, 4819 const PartialDiagnostic &AmbigDiag, 4820 const PartialDiagnostic &CandidateDiag, 4821 bool Complain = true, 4822 QualType TargetType = QualType()); 4823 4824 ClassTemplatePartialSpecializationDecl * 4825 getMoreSpecializedPartialSpecialization( 4826 ClassTemplatePartialSpecializationDecl *PS1, 4827 ClassTemplatePartialSpecializationDecl *PS2, 4828 SourceLocation Loc); 4829 4830 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4831 bool OnlyDeduced, 4832 unsigned Depth, 4833 llvm::SmallBitVector &Used); 4834 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4835 llvm::SmallBitVector &Deduced) { 4836 return MarkDeducedTemplateParameters(Context, FunctionTemplate, Deduced); 4837 } 4838 static void MarkDeducedTemplateParameters(ASTContext &Ctx, 4839 FunctionTemplateDecl *FunctionTemplate, 4840 llvm::SmallBitVector &Deduced); 4841 4842 //===--------------------------------------------------------------------===// 4843 // C++ Template Instantiation 4844 // 4845 4846 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4847 const TemplateArgumentList *Innermost = 0, 4848 bool RelativeToPrimary = false, 4849 const FunctionDecl *Pattern = 0); 4850 4851 /// \brief A template instantiation that is currently in progress. 4852 struct ActiveTemplateInstantiation { 4853 /// \brief The kind of template instantiation we are performing 4854 enum InstantiationKind { 4855 /// We are instantiating a template declaration. The entity is 4856 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4857 TemplateInstantiation, 4858 4859 /// We are instantiating a default argument for a template 4860 /// parameter. The Entity is the template, and 4861 /// TemplateArgs/NumTemplateArguments provides the template 4862 /// arguments as specified. 4863 /// FIXME: Use a TemplateArgumentList 4864 DefaultTemplateArgumentInstantiation, 4865 4866 /// We are instantiating a default argument for a function. 4867 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4868 /// provides the template arguments as specified. 4869 DefaultFunctionArgumentInstantiation, 4870 4871 /// We are substituting explicit template arguments provided for 4872 /// a function template. The entity is a FunctionTemplateDecl. 4873 ExplicitTemplateArgumentSubstitution, 4874 4875 /// We are substituting template argument determined as part of 4876 /// template argument deduction for either a class template 4877 /// partial specialization or a function template. The 4878 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4879 /// a FunctionTemplateDecl. 4880 DeducedTemplateArgumentSubstitution, 4881 4882 /// We are substituting prior template arguments into a new 4883 /// template parameter. The template parameter itself is either a 4884 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4885 PriorTemplateArgumentSubstitution, 4886 4887 /// We are checking the validity of a default template argument that 4888 /// has been used when naming a template-id. 4889 DefaultTemplateArgumentChecking 4890 } Kind; 4891 4892 /// \brief The point of instantiation within the source code. 4893 SourceLocation PointOfInstantiation; 4894 4895 /// \brief The template (or partial specialization) in which we are 4896 /// performing the instantiation, for substitutions of prior template 4897 /// arguments. 4898 NamedDecl *Template; 4899 4900 /// \brief The entity that is being instantiated. 4901 uintptr_t Entity; 4902 4903 /// \brief The list of template arguments we are substituting, if they 4904 /// are not part of the entity. 4905 const TemplateArgument *TemplateArgs; 4906 4907 /// \brief The number of template arguments in TemplateArgs. 4908 unsigned NumTemplateArgs; 4909 4910 /// \brief The template deduction info object associated with the 4911 /// substitution or checking of explicit or deduced template arguments. 4912 sema::TemplateDeductionInfo *DeductionInfo; 4913 4914 /// \brief The source range that covers the construct that cause 4915 /// the instantiation, e.g., the template-id that causes a class 4916 /// template instantiation. 4917 SourceRange InstantiationRange; 4918 4919 ActiveTemplateInstantiation() 4920 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4921 NumTemplateArgs(0), DeductionInfo(0) {} 4922 4923 /// \brief Determines whether this template is an actual instantiation 4924 /// that should be counted toward the maximum instantiation depth. 4925 bool isInstantiationRecord() const; 4926 4927 friend bool operator==(const ActiveTemplateInstantiation &X, 4928 const ActiveTemplateInstantiation &Y) { 4929 if (X.Kind != Y.Kind) 4930 return false; 4931 4932 if (X.Entity != Y.Entity) 4933 return false; 4934 4935 switch (X.Kind) { 4936 case TemplateInstantiation: 4937 return true; 4938 4939 case PriorTemplateArgumentSubstitution: 4940 case DefaultTemplateArgumentChecking: 4941 if (X.Template != Y.Template) 4942 return false; 4943 4944 // Fall through 4945 4946 case DefaultTemplateArgumentInstantiation: 4947 case ExplicitTemplateArgumentSubstitution: 4948 case DeducedTemplateArgumentSubstitution: 4949 case DefaultFunctionArgumentInstantiation: 4950 return X.TemplateArgs == Y.TemplateArgs; 4951 4952 } 4953 4954 llvm_unreachable("Invalid InstantiationKind!"); 4955 } 4956 4957 friend bool operator!=(const ActiveTemplateInstantiation &X, 4958 const ActiveTemplateInstantiation &Y) { 4959 return !(X == Y); 4960 } 4961 }; 4962 4963 /// \brief List of active template instantiations. 4964 /// 4965 /// This vector is treated as a stack. As one template instantiation 4966 /// requires another template instantiation, additional 4967 /// instantiations are pushed onto the stack up to a 4968 /// user-configurable limit LangOptions::InstantiationDepth. 4969 SmallVector<ActiveTemplateInstantiation, 16> 4970 ActiveTemplateInstantiations; 4971 4972 /// \brief Whether we are in a SFINAE context that is not associated with 4973 /// template instantiation. 4974 /// 4975 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4976 /// of a template instantiation or template argument deduction. 4977 bool InNonInstantiationSFINAEContext; 4978 4979 /// \brief The number of ActiveTemplateInstantiation entries in 4980 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4981 /// therefore, should not be counted as part of the instantiation depth. 4982 unsigned NonInstantiationEntries; 4983 4984 /// \brief The last template from which a template instantiation 4985 /// error or warning was produced. 4986 /// 4987 /// This value is used to suppress printing of redundant template 4988 /// instantiation backtraces when there are multiple errors in the 4989 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4990 /// to implement it anywhere else. 4991 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4992 4993 /// \brief The current index into pack expansion arguments that will be 4994 /// used for substitution of parameter packs. 4995 /// 4996 /// The pack expansion index will be -1 to indicate that parameter packs 4997 /// should be instantiated as themselves. Otherwise, the index specifies 4998 /// which argument within the parameter pack will be used for substitution. 4999 int ArgumentPackSubstitutionIndex; 5000 5001 /// \brief RAII object used to change the argument pack substitution index 5002 /// within a \c Sema object. 5003 /// 5004 /// See \c ArgumentPackSubstitutionIndex for more information. 5005 class ArgumentPackSubstitutionIndexRAII { 5006 Sema &Self; 5007 int OldSubstitutionIndex; 5008 5009 public: 5010 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 5011 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 5012 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 5013 } 5014 5015 ~ArgumentPackSubstitutionIndexRAII() { 5016 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 5017 } 5018 }; 5019 5020 friend class ArgumentPackSubstitutionRAII; 5021 5022 /// \brief The stack of calls expression undergoing template instantiation. 5023 /// 5024 /// The top of this stack is used by a fixit instantiating unresolved 5025 /// function calls to fix the AST to match the textual change it prints. 5026 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 5027 5028 /// \brief For each declaration that involved template argument deduction, the 5029 /// set of diagnostics that were suppressed during that template argument 5030 /// deduction. 5031 /// 5032 /// FIXME: Serialize this structure to the AST file. 5033 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 5034 SuppressedDiagnostics; 5035 5036 /// \brief A stack object to be created when performing template 5037 /// instantiation. 5038 /// 5039 /// Construction of an object of type \c InstantiatingTemplate 5040 /// pushes the current instantiation onto the stack of active 5041 /// instantiations. If the size of this stack exceeds the maximum 5042 /// number of recursive template instantiations, construction 5043 /// produces an error and evaluates true. 5044 /// 5045 /// Destruction of this object will pop the named instantiation off 5046 /// the stack. 5047 struct InstantiatingTemplate { 5048 /// \brief Note that we are instantiating a class template, 5049 /// function template, or a member thereof. 5050 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5051 Decl *Entity, 5052 SourceRange InstantiationRange = SourceRange()); 5053 5054 /// \brief Note that we are instantiating a default argument in a 5055 /// template-id. 5056 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5057 TemplateDecl *Template, 5058 const TemplateArgument *TemplateArgs, 5059 unsigned NumTemplateArgs, 5060 SourceRange InstantiationRange = SourceRange()); 5061 5062 /// \brief Note that we are instantiating a default argument in a 5063 /// template-id. 5064 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5065 FunctionTemplateDecl *FunctionTemplate, 5066 const TemplateArgument *TemplateArgs, 5067 unsigned NumTemplateArgs, 5068 ActiveTemplateInstantiation::InstantiationKind Kind, 5069 sema::TemplateDeductionInfo &DeductionInfo, 5070 SourceRange InstantiationRange = SourceRange()); 5071 5072 /// \brief Note that we are instantiating as part of template 5073 /// argument deduction for a class template partial 5074 /// specialization. 5075 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5076 ClassTemplatePartialSpecializationDecl *PartialSpec, 5077 const TemplateArgument *TemplateArgs, 5078 unsigned NumTemplateArgs, 5079 sema::TemplateDeductionInfo &DeductionInfo, 5080 SourceRange InstantiationRange = SourceRange()); 5081 5082 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5083 ParmVarDecl *Param, 5084 const TemplateArgument *TemplateArgs, 5085 unsigned NumTemplateArgs, 5086 SourceRange InstantiationRange = SourceRange()); 5087 5088 /// \brief Note that we are substituting prior template arguments into a 5089 /// non-type or template template parameter. 5090 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5091 NamedDecl *Template, 5092 NonTypeTemplateParmDecl *Param, 5093 const TemplateArgument *TemplateArgs, 5094 unsigned NumTemplateArgs, 5095 SourceRange InstantiationRange); 5096 5097 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5098 NamedDecl *Template, 5099 TemplateTemplateParmDecl *Param, 5100 const TemplateArgument *TemplateArgs, 5101 unsigned NumTemplateArgs, 5102 SourceRange InstantiationRange); 5103 5104 /// \brief Note that we are checking the default template argument 5105 /// against the template parameter for a given template-id. 5106 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5107 TemplateDecl *Template, 5108 NamedDecl *Param, 5109 const TemplateArgument *TemplateArgs, 5110 unsigned NumTemplateArgs, 5111 SourceRange InstantiationRange); 5112 5113 5114 /// \brief Note that we have finished instantiating this template. 5115 void Clear(); 5116 5117 ~InstantiatingTemplate() { Clear(); } 5118 5119 /// \brief Determines whether we have exceeded the maximum 5120 /// recursive template instantiations. 5121 operator bool() const { return Invalid; } 5122 5123 private: 5124 Sema &SemaRef; 5125 bool Invalid; 5126 bool SavedInNonInstantiationSFINAEContext; 5127 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 5128 SourceRange InstantiationRange); 5129 5130 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 5131 5132 InstantiatingTemplate& 5133 operator=(const InstantiatingTemplate&); // not implemented 5134 }; 5135 5136 void PrintInstantiationStack(); 5137 5138 /// \brief Determines whether we are currently in a context where 5139 /// template argument substitution failures are not considered 5140 /// errors. 5141 /// 5142 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 5143 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 5144 /// template-deduction context object, which can be used to capture 5145 /// diagnostics that will be suppressed. 5146 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 5147 5148 /// \brief RAII class used to determine whether SFINAE has 5149 /// trapped any errors that occur during template argument 5150 /// deduction.` 5151 class SFINAETrap { 5152 Sema &SemaRef; 5153 unsigned PrevSFINAEErrors; 5154 bool PrevInNonInstantiationSFINAEContext; 5155 bool PrevAccessCheckingSFINAE; 5156 5157 public: 5158 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 5159 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 5160 PrevInNonInstantiationSFINAEContext( 5161 SemaRef.InNonInstantiationSFINAEContext), 5162 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 5163 { 5164 if (!SemaRef.isSFINAEContext()) 5165 SemaRef.InNonInstantiationSFINAEContext = true; 5166 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 5167 } 5168 5169 ~SFINAETrap() { 5170 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 5171 SemaRef.InNonInstantiationSFINAEContext 5172 = PrevInNonInstantiationSFINAEContext; 5173 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 5174 } 5175 5176 /// \brief Determine whether any SFINAE errors have been trapped. 5177 bool hasErrorOccurred() const { 5178 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 5179 } 5180 }; 5181 5182 /// \brief The current instantiation scope used to store local 5183 /// variables. 5184 LocalInstantiationScope *CurrentInstantiationScope; 5185 5186 /// \brief The number of typos corrected by CorrectTypo. 5187 unsigned TyposCorrected; 5188 5189 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 5190 UnqualifiedTyposCorrectedMap; 5191 5192 /// \brief A cache containing the results of typo correction for unqualified 5193 /// name lookup. 5194 /// 5195 /// The string is the string that we corrected to (which may be empty, if 5196 /// there was no correction), while the boolean will be true when the 5197 /// string represents a keyword. 5198 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 5199 5200 /// \brief Worker object for performing CFG-based warnings. 5201 sema::AnalysisBasedWarnings AnalysisWarnings; 5202 5203 /// \brief An entity for which implicit template instantiation is required. 5204 /// 5205 /// The source location associated with the declaration is the first place in 5206 /// the source code where the declaration was "used". It is not necessarily 5207 /// the point of instantiation (which will be either before or after the 5208 /// namespace-scope declaration that triggered this implicit instantiation), 5209 /// However, it is the location that diagnostics should generally refer to, 5210 /// because users will need to know what code triggered the instantiation. 5211 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 5212 5213 /// \brief The queue of implicit template instantiations that are required 5214 /// but have not yet been performed. 5215 std::deque<PendingImplicitInstantiation> PendingInstantiations; 5216 5217 /// \brief The queue of implicit template instantiations that are required 5218 /// and must be performed within the current local scope. 5219 /// 5220 /// This queue is only used for member functions of local classes in 5221 /// templates, which must be instantiated in the same scope as their 5222 /// enclosing function, so that they can reference function-local 5223 /// types, static variables, enumerators, etc. 5224 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 5225 5226 void PerformPendingInstantiations(bool LocalOnly = false); 5227 5228 TypeSourceInfo *SubstType(TypeSourceInfo *T, 5229 const MultiLevelTemplateArgumentList &TemplateArgs, 5230 SourceLocation Loc, DeclarationName Entity); 5231 5232 QualType SubstType(QualType T, 5233 const MultiLevelTemplateArgumentList &TemplateArgs, 5234 SourceLocation Loc, DeclarationName Entity); 5235 5236 TypeSourceInfo *SubstType(TypeLoc TL, 5237 const MultiLevelTemplateArgumentList &TemplateArgs, 5238 SourceLocation Loc, DeclarationName Entity); 5239 5240 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 5241 const MultiLevelTemplateArgumentList &TemplateArgs, 5242 SourceLocation Loc, 5243 DeclarationName Entity); 5244 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 5245 const MultiLevelTemplateArgumentList &TemplateArgs, 5246 int indexAdjustment, 5247 llvm::Optional<unsigned> NumExpansions, 5248 bool ExpectParameterPack); 5249 bool SubstParmTypes(SourceLocation Loc, 5250 ParmVarDecl **Params, unsigned NumParams, 5251 const MultiLevelTemplateArgumentList &TemplateArgs, 5252 SmallVectorImpl<QualType> &ParamTypes, 5253 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 5254 ExprResult SubstExpr(Expr *E, 5255 const MultiLevelTemplateArgumentList &TemplateArgs); 5256 5257 /// \brief Substitute the given template arguments into a list of 5258 /// expressions, expanding pack expansions if required. 5259 /// 5260 /// \param Exprs The list of expressions to substitute into. 5261 /// 5262 /// \param NumExprs The number of expressions in \p Exprs. 5263 /// 5264 /// \param IsCall Whether this is some form of call, in which case 5265 /// default arguments will be dropped. 5266 /// 5267 /// \param TemplateArgs The set of template arguments to substitute. 5268 /// 5269 /// \param Outputs Will receive all of the substituted arguments. 5270 /// 5271 /// \returns true if an error occurred, false otherwise. 5272 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 5273 const MultiLevelTemplateArgumentList &TemplateArgs, 5274 SmallVectorImpl<Expr *> &Outputs); 5275 5276 StmtResult SubstStmt(Stmt *S, 5277 const MultiLevelTemplateArgumentList &TemplateArgs); 5278 5279 Decl *SubstDecl(Decl *D, DeclContext *Owner, 5280 const MultiLevelTemplateArgumentList &TemplateArgs); 5281 5282 ExprResult SubstInitializer(Expr *E, 5283 const MultiLevelTemplateArgumentList &TemplateArgs, 5284 bool CXXDirectInit); 5285 5286 bool 5287 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 5288 CXXRecordDecl *Pattern, 5289 const MultiLevelTemplateArgumentList &TemplateArgs); 5290 5291 bool 5292 InstantiateClass(SourceLocation PointOfInstantiation, 5293 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 5294 const MultiLevelTemplateArgumentList &TemplateArgs, 5295 TemplateSpecializationKind TSK, 5296 bool Complain = true); 5297 5298 struct LateInstantiatedAttribute { 5299 const Attr *TmplAttr; 5300 LocalInstantiationScope *Scope; 5301 Decl *NewDecl; 5302 5303 LateInstantiatedAttribute(const Attr *A, LocalInstantiationScope *S, 5304 Decl *D) 5305 : TmplAttr(A), Scope(S), NewDecl(D) 5306 { } 5307 }; 5308 typedef SmallVector<LateInstantiatedAttribute, 16> LateInstantiatedAttrVec; 5309 5310 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 5311 const Decl *Pattern, Decl *Inst, 5312 LateInstantiatedAttrVec *LateAttrs = 0, 5313 LocalInstantiationScope *OuterMostScope = 0); 5314 5315 bool 5316 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 5317 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5318 TemplateSpecializationKind TSK, 5319 bool Complain = true); 5320 5321 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 5322 CXXRecordDecl *Instantiation, 5323 const MultiLevelTemplateArgumentList &TemplateArgs, 5324 TemplateSpecializationKind TSK); 5325 5326 void InstantiateClassTemplateSpecializationMembers( 5327 SourceLocation PointOfInstantiation, 5328 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5329 TemplateSpecializationKind TSK); 5330 5331 NestedNameSpecifierLoc 5332 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 5333 const MultiLevelTemplateArgumentList &TemplateArgs); 5334 5335 DeclarationNameInfo 5336 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 5337 const MultiLevelTemplateArgumentList &TemplateArgs); 5338 TemplateName 5339 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 5340 SourceLocation Loc, 5341 const MultiLevelTemplateArgumentList &TemplateArgs); 5342 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 5343 TemplateArgumentListInfo &Result, 5344 const MultiLevelTemplateArgumentList &TemplateArgs); 5345 5346 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 5347 FunctionDecl *Function, 5348 bool Recursive = false, 5349 bool DefinitionRequired = false); 5350 void InstantiateStaticDataMemberDefinition( 5351 SourceLocation PointOfInstantiation, 5352 VarDecl *Var, 5353 bool Recursive = false, 5354 bool DefinitionRequired = false); 5355 5356 void InstantiateMemInitializers(CXXConstructorDecl *New, 5357 const CXXConstructorDecl *Tmpl, 5358 const MultiLevelTemplateArgumentList &TemplateArgs); 5359 5360 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 5361 const MultiLevelTemplateArgumentList &TemplateArgs); 5362 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 5363 const MultiLevelTemplateArgumentList &TemplateArgs); 5364 5365 // Objective-C declarations. 5366 enum ObjCContainerKind { 5367 OCK_None = -1, 5368 OCK_Interface = 0, 5369 OCK_Protocol, 5370 OCK_Category, 5371 OCK_ClassExtension, 5372 OCK_Implementation, 5373 OCK_CategoryImplementation 5374 }; 5375 ObjCContainerKind getObjCContainerKind() const; 5376 5377 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 5378 IdentifierInfo *ClassName, 5379 SourceLocation ClassLoc, 5380 IdentifierInfo *SuperName, 5381 SourceLocation SuperLoc, 5382 Decl * const *ProtoRefs, 5383 unsigned NumProtoRefs, 5384 const SourceLocation *ProtoLocs, 5385 SourceLocation EndProtoLoc, 5386 AttributeList *AttrList); 5387 5388 Decl *ActOnCompatiblityAlias( 5389 SourceLocation AtCompatibilityAliasLoc, 5390 IdentifierInfo *AliasName, SourceLocation AliasLocation, 5391 IdentifierInfo *ClassName, SourceLocation ClassLocation); 5392 5393 bool CheckForwardProtocolDeclarationForCircularDependency( 5394 IdentifierInfo *PName, 5395 SourceLocation &PLoc, SourceLocation PrevLoc, 5396 const ObjCList<ObjCProtocolDecl> &PList); 5397 5398 Decl *ActOnStartProtocolInterface( 5399 SourceLocation AtProtoInterfaceLoc, 5400 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 5401 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 5402 const SourceLocation *ProtoLocs, 5403 SourceLocation EndProtoLoc, 5404 AttributeList *AttrList); 5405 5406 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 5407 IdentifierInfo *ClassName, 5408 SourceLocation ClassLoc, 5409 IdentifierInfo *CategoryName, 5410 SourceLocation CategoryLoc, 5411 Decl * const *ProtoRefs, 5412 unsigned NumProtoRefs, 5413 const SourceLocation *ProtoLocs, 5414 SourceLocation EndProtoLoc); 5415 5416 Decl *ActOnStartClassImplementation( 5417 SourceLocation AtClassImplLoc, 5418 IdentifierInfo *ClassName, SourceLocation ClassLoc, 5419 IdentifierInfo *SuperClassname, 5420 SourceLocation SuperClassLoc); 5421 5422 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 5423 IdentifierInfo *ClassName, 5424 SourceLocation ClassLoc, 5425 IdentifierInfo *CatName, 5426 SourceLocation CatLoc); 5427 5428 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc, 5429 IdentifierInfo **IdentList, 5430 SourceLocation *IdentLocs, 5431 unsigned NumElts); 5432 5433 DeclGroupPtrTy ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 5434 const IdentifierLocPair *IdentList, 5435 unsigned NumElts, 5436 AttributeList *attrList); 5437 5438 void FindProtocolDeclaration(bool WarnOnDeclarations, 5439 const IdentifierLocPair *ProtocolId, 5440 unsigned NumProtocols, 5441 SmallVectorImpl<Decl *> &Protocols); 5442 5443 /// Ensure attributes are consistent with type. 5444 /// \param [in, out] Attributes The attributes to check; they will 5445 /// be modified to be consistent with \arg PropertyTy. 5446 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5447 SourceLocation Loc, 5448 unsigned &Attributes); 5449 5450 /// Process the specified property declaration and create decls for the 5451 /// setters and getters as needed. 5452 /// \param property The property declaration being processed 5453 /// \param DC The semantic container for the property 5454 /// \param redeclaredProperty Declaration for property if redeclared 5455 /// in class extension. 5456 /// \param lexicalDC Container for redeclaredProperty. 5457 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5458 ObjCContainerDecl *DC, 5459 ObjCPropertyDecl *redeclaredProperty = 0, 5460 ObjCContainerDecl *lexicalDC = 0); 5461 5462 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5463 ObjCPropertyDecl *SuperProperty, 5464 const IdentifierInfo *Name); 5465 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5466 5467 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5468 ObjCMethodDecl *MethodDecl, 5469 bool IsInstance); 5470 5471 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5472 5473 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5474 ObjCInterfaceDecl *ID); 5475 5476 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5477 ObjCProtocolDecl *PDecl); 5478 5479 Decl *ActOnAtEnd(Scope *S, SourceRange AtEnd, 5480 Decl **allMethods = 0, unsigned allNum = 0, 5481 Decl **allProperties = 0, unsigned pNum = 0, 5482 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5483 5484 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5485 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5486 Selector GetterSel, Selector SetterSel, 5487 bool *OverridingProperty, 5488 tok::ObjCKeywordKind MethodImplKind, 5489 DeclContext *lexicalDC = 0); 5490 5491 Decl *ActOnPropertyImplDecl(Scope *S, 5492 SourceLocation AtLoc, 5493 SourceLocation PropertyLoc, 5494 bool ImplKind, 5495 IdentifierInfo *PropertyId, 5496 IdentifierInfo *PropertyIvar, 5497 SourceLocation PropertyIvarLoc); 5498 5499 enum ObjCSpecialMethodKind { 5500 OSMK_None, 5501 OSMK_Alloc, 5502 OSMK_New, 5503 OSMK_Copy, 5504 OSMK_RetainingInit, 5505 OSMK_NonRetainingInit 5506 }; 5507 5508 struct ObjCArgInfo { 5509 IdentifierInfo *Name; 5510 SourceLocation NameLoc; 5511 // The Type is null if no type was specified, and the DeclSpec is invalid 5512 // in this case. 5513 ParsedType Type; 5514 ObjCDeclSpec DeclSpec; 5515 5516 /// ArgAttrs - Attribute list for this argument. 5517 AttributeList *ArgAttrs; 5518 }; 5519 5520 Decl *ActOnMethodDeclaration( 5521 Scope *S, 5522 SourceLocation BeginLoc, // location of the + or -. 5523 SourceLocation EndLoc, // location of the ; or {. 5524 tok::TokenKind MethodType, 5525 ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5526 ArrayRef<SourceLocation> SelectorLocs, Selector Sel, 5527 // optional arguments. The number of types/arguments is obtained 5528 // from the Sel.getNumArgs(). 5529 ObjCArgInfo *ArgInfo, 5530 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5531 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5532 bool isVariadic, bool MethodDefinition); 5533 5534 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5535 // Will search "local" class/category implementations for a method decl. 5536 // Will also search in class's root looking for instance method. 5537 // Returns 0 if no method is found. 5538 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5539 ObjCInterfaceDecl *CDecl); 5540 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5541 ObjCInterfaceDecl *ClassDecl); 5542 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5543 const ObjCObjectPointerType *OPT, 5544 bool IsInstance); 5545 ObjCMethodDecl *LookupMethodInObjectType(Selector Sel, QualType Ty, 5546 bool IsInstance); 5547 5548 bool inferObjCARCLifetime(ValueDecl *decl); 5549 5550 ExprResult 5551 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5552 Expr *BaseExpr, 5553 SourceLocation OpLoc, 5554 DeclarationName MemberName, 5555 SourceLocation MemberLoc, 5556 SourceLocation SuperLoc, QualType SuperType, 5557 bool Super); 5558 5559 ExprResult 5560 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5561 IdentifierInfo &propertyName, 5562 SourceLocation receiverNameLoc, 5563 SourceLocation propertyNameLoc); 5564 5565 ObjCMethodDecl *tryCaptureObjCSelf(SourceLocation Loc); 5566 5567 /// \brief Describes the kind of message expression indicated by a message 5568 /// send that starts with an identifier. 5569 enum ObjCMessageKind { 5570 /// \brief The message is sent to 'super'. 5571 ObjCSuperMessage, 5572 /// \brief The message is an instance message. 5573 ObjCInstanceMessage, 5574 /// \brief The message is a class message, and the identifier is a type 5575 /// name. 5576 ObjCClassMessage 5577 }; 5578 5579 ObjCMessageKind getObjCMessageKind(Scope *S, 5580 IdentifierInfo *Name, 5581 SourceLocation NameLoc, 5582 bool IsSuper, 5583 bool HasTrailingDot, 5584 ParsedType &ReceiverType); 5585 5586 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5587 Selector Sel, 5588 SourceLocation LBracLoc, 5589 ArrayRef<SourceLocation> SelectorLocs, 5590 SourceLocation RBracLoc, 5591 MultiExprArg Args); 5592 5593 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5594 QualType ReceiverType, 5595 SourceLocation SuperLoc, 5596 Selector Sel, 5597 ObjCMethodDecl *Method, 5598 SourceLocation LBracLoc, 5599 ArrayRef<SourceLocation> SelectorLocs, 5600 SourceLocation RBracLoc, 5601 MultiExprArg Args, 5602 bool isImplicit = false); 5603 5604 ExprResult BuildClassMessageImplicit(QualType ReceiverType, 5605 bool isSuperReceiver, 5606 SourceLocation Loc, 5607 Selector Sel, 5608 ObjCMethodDecl *Method, 5609 MultiExprArg Args); 5610 5611 ExprResult ActOnClassMessage(Scope *S, 5612 ParsedType Receiver, 5613 Selector Sel, 5614 SourceLocation LBracLoc, 5615 ArrayRef<SourceLocation> SelectorLocs, 5616 SourceLocation RBracLoc, 5617 MultiExprArg Args); 5618 5619 ExprResult BuildInstanceMessage(Expr *Receiver, 5620 QualType ReceiverType, 5621 SourceLocation SuperLoc, 5622 Selector Sel, 5623 ObjCMethodDecl *Method, 5624 SourceLocation LBracLoc, 5625 ArrayRef<SourceLocation> SelectorLocs, 5626 SourceLocation RBracLoc, 5627 MultiExprArg Args, 5628 bool isImplicit = false); 5629 5630 ExprResult BuildInstanceMessageImplicit(Expr *Receiver, 5631 QualType ReceiverType, 5632 SourceLocation Loc, 5633 Selector Sel, 5634 ObjCMethodDecl *Method, 5635 MultiExprArg Args); 5636 5637 ExprResult ActOnInstanceMessage(Scope *S, 5638 Expr *Receiver, 5639 Selector Sel, 5640 SourceLocation LBracLoc, 5641 ArrayRef<SourceLocation> SelectorLocs, 5642 SourceLocation RBracLoc, 5643 MultiExprArg Args); 5644 5645 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5646 ObjCBridgeCastKind Kind, 5647 SourceLocation BridgeKeywordLoc, 5648 TypeSourceInfo *TSInfo, 5649 Expr *SubExpr); 5650 5651 ExprResult ActOnObjCBridgedCast(Scope *S, 5652 SourceLocation LParenLoc, 5653 ObjCBridgeCastKind Kind, 5654 SourceLocation BridgeKeywordLoc, 5655 ParsedType Type, 5656 SourceLocation RParenLoc, 5657 Expr *SubExpr); 5658 5659 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5660 5661 /// \brief Check whether the given new method is a valid override of the 5662 /// given overridden method, and set any properties that should be inherited. 5663 void CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5664 const ObjCMethodDecl *Overridden, 5665 bool IsImplementation); 5666 5667 /// \brief Check whether the given method overrides any methods in its class, 5668 /// calling \c CheckObjCMethodOverride for each overridden method. 5669 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5670 5671 enum PragmaOptionsAlignKind { 5672 POAK_Native, // #pragma options align=native 5673 POAK_Natural, // #pragma options align=natural 5674 POAK_Packed, // #pragma options align=packed 5675 POAK_Power, // #pragma options align=power 5676 POAK_Mac68k, // #pragma options align=mac68k 5677 POAK_Reset // #pragma options align=reset 5678 }; 5679 5680 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5681 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5682 SourceLocation PragmaLoc, 5683 SourceLocation KindLoc); 5684 5685 enum PragmaPackKind { 5686 PPK_Default, // #pragma pack([n]) 5687 PPK_Show, // #pragma pack(show), only supported by MSVC. 5688 PPK_Push, // #pragma pack(push, [identifier], [n]) 5689 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5690 }; 5691 5692 enum PragmaMSStructKind { 5693 PMSST_OFF, // #pragms ms_struct off 5694 PMSST_ON // #pragms ms_struct on 5695 }; 5696 5697 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5698 void ActOnPragmaPack(PragmaPackKind Kind, 5699 IdentifierInfo *Name, 5700 Expr *Alignment, 5701 SourceLocation PragmaLoc, 5702 SourceLocation LParenLoc, 5703 SourceLocation RParenLoc); 5704 5705 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5706 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5707 5708 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5709 void ActOnPragmaUnused(const Token &Identifier, 5710 Scope *curScope, 5711 SourceLocation PragmaLoc); 5712 5713 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5714 void ActOnPragmaVisibility(const IdentifierInfo* VisType, 5715 SourceLocation PragmaLoc); 5716 5717 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II, 5718 SourceLocation Loc); 5719 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5720 5721 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5722 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5723 SourceLocation PragmaLoc, 5724 SourceLocation WeakNameLoc); 5725 5726 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5727 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5728 IdentifierInfo* AliasName, 5729 SourceLocation PragmaLoc, 5730 SourceLocation WeakNameLoc, 5731 SourceLocation AliasNameLoc); 5732 5733 /// ActOnPragmaFPContract - Called on well formed 5734 /// #pragma {STDC,OPENCL} FP_CONTRACT 5735 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5736 5737 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5738 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5739 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5740 5741 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5742 void AddMsStructLayoutForRecord(RecordDecl *RD); 5743 5744 /// FreePackedContext - Deallocate and null out PackContext. 5745 void FreePackedContext(); 5746 5747 /// PushNamespaceVisibilityAttr - Note that we've entered a 5748 /// namespace with a visibility attribute. 5749 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr, 5750 SourceLocation Loc); 5751 5752 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5753 /// add an appropriate visibility attribute. 5754 void AddPushedVisibilityAttribute(Decl *RD); 5755 5756 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5757 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5758 void PopPragmaVisibility(bool IsNamespaceEnd, SourceLocation EndLoc); 5759 5760 /// FreeVisContext - Deallocate and null out VisContext. 5761 void FreeVisContext(); 5762 5763 /// AddCFAuditedAttribute - Check whether we're currently within 5764 /// '#pragma clang arc_cf_code_audited' and, if so, consider adding 5765 /// the appropriate attribute. 5766 void AddCFAuditedAttribute(Decl *D); 5767 5768 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5769 void AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E); 5770 void AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *T); 5771 5772 /// \brief The kind of conversion being performed. 5773 enum CheckedConversionKind { 5774 /// \brief An implicit conversion. 5775 CCK_ImplicitConversion, 5776 /// \brief A C-style cast. 5777 CCK_CStyleCast, 5778 /// \brief A functional-style cast. 5779 CCK_FunctionalCast, 5780 /// \brief A cast other than a C-style cast. 5781 CCK_OtherCast 5782 }; 5783 5784 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5785 /// cast. If there is already an implicit cast, merge into the existing one. 5786 /// If isLvalue, the result of the cast is an lvalue. 5787 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5788 ExprValueKind VK = VK_RValue, 5789 const CXXCastPath *BasePath = 0, 5790 CheckedConversionKind CCK 5791 = CCK_ImplicitConversion); 5792 5793 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5794 /// to the conversion from scalar type ScalarTy to the Boolean type. 5795 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5796 5797 /// IgnoredValueConversions - Given that an expression's result is 5798 /// syntactically ignored, perform any conversions that are 5799 /// required. 5800 ExprResult IgnoredValueConversions(Expr *E); 5801 5802 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5803 // functions and arrays to their respective pointers (C99 6.3.2.1). 5804 ExprResult UsualUnaryConversions(Expr *E); 5805 5806 // DefaultFunctionArrayConversion - converts functions and arrays 5807 // to their respective pointers (C99 6.3.2.1). 5808 ExprResult DefaultFunctionArrayConversion(Expr *E); 5809 5810 // DefaultFunctionArrayLvalueConversion - converts functions and 5811 // arrays to their respective pointers and performs the 5812 // lvalue-to-rvalue conversion. 5813 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5814 5815 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5816 // the operand. This is DefaultFunctionArrayLvalueConversion, 5817 // except that it assumes the operand isn't of function or array 5818 // type. 5819 ExprResult DefaultLvalueConversion(Expr *E); 5820 5821 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5822 // do not have a prototype. Integer promotions are performed on each 5823 // argument, and arguments that have type float are promoted to double. 5824 ExprResult DefaultArgumentPromotion(Expr *E); 5825 5826 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5827 enum VariadicCallType { 5828 VariadicFunction, 5829 VariadicBlock, 5830 VariadicMethod, 5831 VariadicConstructor, 5832 VariadicDoesNotApply 5833 }; 5834 5835 /// GatherArgumentsForCall - Collector argument expressions for various 5836 /// form of call prototypes. 5837 bool GatherArgumentsForCall(SourceLocation CallLoc, 5838 FunctionDecl *FDecl, 5839 const FunctionProtoType *Proto, 5840 unsigned FirstProtoArg, 5841 Expr **Args, unsigned NumArgs, 5842 SmallVector<Expr *, 8> &AllArgs, 5843 VariadicCallType CallType = VariadicDoesNotApply); 5844 5845 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5846 // will warn if the resulting type is not a POD type. 5847 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5848 FunctionDecl *FDecl); 5849 5850 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5851 // operands and then handles various conversions that are common to binary 5852 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5853 // routine returns the first non-arithmetic type found. The client is 5854 // responsible for emitting appropriate error diagnostics. 5855 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS, 5856 bool IsCompAssign = false); 5857 5858 /// AssignConvertType - All of the 'assignment' semantic checks return this 5859 /// enum to indicate whether the assignment was allowed. These checks are 5860 /// done for simple assignments, as well as initialization, return from 5861 /// function, argument passing, etc. The query is phrased in terms of a 5862 /// source and destination type. 5863 enum AssignConvertType { 5864 /// Compatible - the types are compatible according to the standard. 5865 Compatible, 5866 5867 /// PointerToInt - The assignment converts a pointer to an int, which we 5868 /// accept as an extension. 5869 PointerToInt, 5870 5871 /// IntToPointer - The assignment converts an int to a pointer, which we 5872 /// accept as an extension. 5873 IntToPointer, 5874 5875 /// FunctionVoidPointer - The assignment is between a function pointer and 5876 /// void*, which the standard doesn't allow, but we accept as an extension. 5877 FunctionVoidPointer, 5878 5879 /// IncompatiblePointer - The assignment is between two pointers types that 5880 /// are not compatible, but we accept them as an extension. 5881 IncompatiblePointer, 5882 5883 /// IncompatiblePointer - The assignment is between two pointers types which 5884 /// point to integers which have a different sign, but are otherwise 5885 /// identical. This is a subset of the above, but broken out because it's by 5886 /// far the most common case of incompatible pointers. 5887 IncompatiblePointerSign, 5888 5889 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5890 /// c/v/r qualifiers, which we accept as an extension. 5891 CompatiblePointerDiscardsQualifiers, 5892 5893 /// IncompatiblePointerDiscardsQualifiers - The assignment 5894 /// discards qualifiers that we don't permit to be discarded, 5895 /// like address spaces. 5896 IncompatiblePointerDiscardsQualifiers, 5897 5898 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5899 /// nested pointer types, and the qualifiers other than the first two 5900 /// levels differ e.g. char ** -> const char **, but we accept them as an 5901 /// extension. 5902 IncompatibleNestedPointerQualifiers, 5903 5904 /// IncompatibleVectors - The assignment is between two vector types that 5905 /// have the same size, which we accept as an extension. 5906 IncompatibleVectors, 5907 5908 /// IntToBlockPointer - The assignment converts an int to a block 5909 /// pointer. We disallow this. 5910 IntToBlockPointer, 5911 5912 /// IncompatibleBlockPointer - The assignment is between two block 5913 /// pointers types that are not compatible. 5914 IncompatibleBlockPointer, 5915 5916 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5917 /// id type and something else (that is incompatible with it). For example, 5918 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5919 IncompatibleObjCQualifiedId, 5920 5921 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 5922 /// object with __weak qualifier. 5923 IncompatibleObjCWeakRef, 5924 5925 /// Incompatible - We reject this conversion outright, it is invalid to 5926 /// represent it in the AST. 5927 Incompatible 5928 }; 5929 5930 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5931 /// assignment conversion type specified by ConvTy. This returns true if the 5932 /// conversion was invalid or false if the conversion was accepted. 5933 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5934 SourceLocation Loc, 5935 QualType DstType, QualType SrcType, 5936 Expr *SrcExpr, AssignmentAction Action, 5937 bool *Complained = 0); 5938 5939 /// CheckAssignmentConstraints - Perform type checking for assignment, 5940 /// argument passing, variable initialization, and function return values. 5941 /// C99 6.5.16. 5942 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5943 QualType LHSType, 5944 QualType RHSType); 5945 5946 /// Check assignment constraints and prepare for a conversion of the 5947 /// RHS to the LHS type. 5948 AssignConvertType CheckAssignmentConstraints(QualType LHSType, 5949 ExprResult &RHS, 5950 CastKind &Kind); 5951 5952 // CheckSingleAssignmentConstraints - Currently used by 5953 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5954 // this routine performs the default function/array converions. 5955 AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType, 5956 ExprResult &RHS, 5957 bool Diagnose = true); 5958 5959 // \brief If the lhs type is a transparent union, check whether we 5960 // can initialize the transparent union with the given expression. 5961 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType, 5962 ExprResult &RHS); 5963 5964 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5965 5966 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5967 5968 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5969 AssignmentAction Action, 5970 bool AllowExplicit = false); 5971 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5972 AssignmentAction Action, 5973 bool AllowExplicit, 5974 ImplicitConversionSequence& ICS); 5975 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5976 const ImplicitConversionSequence& ICS, 5977 AssignmentAction Action, 5978 CheckedConversionKind CCK 5979 = CCK_ImplicitConversion); 5980 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5981 const StandardConversionSequence& SCS, 5982 AssignmentAction Action, 5983 CheckedConversionKind CCK); 5984 5985 /// the following "Check" methods will return a valid/converted QualType 5986 /// or a null QualType (indicating an error diagnostic was issued). 5987 5988 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5989 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS, 5990 ExprResult &RHS); 5991 QualType CheckPointerToMemberOperands( // C++ 5.5 5992 ExprResult &LHS, ExprResult &RHS, ExprValueKind &VK, 5993 SourceLocation OpLoc, bool isIndirect); 5994 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5995 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign, 5996 bool IsDivide); 5997 QualType CheckRemainderOperands( // C99 6.5.5 5998 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5999 bool IsCompAssign = false); 6000 QualType CheckAdditionOperands( // C99 6.5.6 6001 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6002 QualType* CompLHSTy = 0); 6003 QualType CheckSubtractionOperands( // C99 6.5.6 6004 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6005 QualType* CompLHSTy = 0); 6006 QualType CheckShiftOperands( // C99 6.5.7 6007 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 6008 bool IsCompAssign = false); 6009 QualType CheckCompareOperands( // C99 6.5.8/9 6010 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned OpaqueOpc, 6011 bool isRelational); 6012 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 6013 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6014 bool IsCompAssign = false); 6015 QualType CheckLogicalOperands( // C99 6.5.[13,14] 6016 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc); 6017 // CheckAssignmentOperands is used for both simple and compound assignment. 6018 // For simple assignment, pass both expressions and a null converted type. 6019 // For compound assignment, pass both expressions and the converted type. 6020 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 6021 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType); 6022 6023 ExprResult checkPseudoObjectIncDec(Scope *S, SourceLocation OpLoc, 6024 UnaryOperatorKind Opcode, Expr *Op); 6025 ExprResult checkPseudoObjectAssignment(Scope *S, SourceLocation OpLoc, 6026 BinaryOperatorKind Opcode, 6027 Expr *LHS, Expr *RHS); 6028 ExprResult checkPseudoObjectRValue(Expr *E); 6029 Expr *recreateSyntacticForm(PseudoObjectExpr *E); 6030 6031 QualType CheckConditionalOperands( // C99 6.5.15 6032 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS, 6033 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc); 6034 QualType CXXCheckConditionalOperands( // C++ 5.16 6035 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 6036 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 6037 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 6038 bool *NonStandardCompositeType = 0); 6039 QualType FindCompositePointerType(SourceLocation Loc, 6040 ExprResult &E1, ExprResult &E2, 6041 bool *NonStandardCompositeType = 0) { 6042 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 6043 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, 6044 NonStandardCompositeType); 6045 E1 = Owned(E1Tmp); 6046 E2 = Owned(E2Tmp); 6047 return Composite; 6048 } 6049 6050 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 6051 SourceLocation QuestionLoc); 6052 6053 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr, 6054 SourceLocation QuestionLoc); 6055 6056 /// type checking for vector binary operators. 6057 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS, 6058 SourceLocation Loc, bool IsCompAssign); 6059 QualType GetSignedVectorType(QualType V); 6060 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS, 6061 SourceLocation Loc, bool isRelational); 6062 QualType CheckVectorLogicalOperands(ExprResult &LHS, ExprResult &RHS, 6063 SourceLocation Loc); 6064 6065 /// type checking declaration initializers (C99 6.7.8) 6066 bool CheckForConstantInitializer(Expr *e, QualType t); 6067 6068 // type checking C++ declaration initializers (C++ [dcl.init]). 6069 6070 /// ReferenceCompareResult - Expresses the result of comparing two 6071 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 6072 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 6073 enum ReferenceCompareResult { 6074 /// Ref_Incompatible - The two types are incompatible, so direct 6075 /// reference binding is not possible. 6076 Ref_Incompatible = 0, 6077 /// Ref_Related - The two types are reference-related, which means 6078 /// that their unqualified forms (T1 and T2) are either the same 6079 /// or T1 is a base class of T2. 6080 Ref_Related, 6081 /// Ref_Compatible_With_Added_Qualification - The two types are 6082 /// reference-compatible with added qualification, meaning that 6083 /// they are reference-compatible and the qualifiers on T1 (cv1) 6084 /// are greater than the qualifiers on T2 (cv2). 6085 Ref_Compatible_With_Added_Qualification, 6086 /// Ref_Compatible - The two types are reference-compatible and 6087 /// have equivalent qualifiers (cv1 == cv2). 6088 Ref_Compatible 6089 }; 6090 6091 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 6092 QualType T1, QualType T2, 6093 bool &DerivedToBase, 6094 bool &ObjCConversion, 6095 bool &ObjCLifetimeConversion); 6096 6097 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType, 6098 Expr *CastExpr, CastKind &CastKind, 6099 ExprValueKind &VK, CXXCastPath &Path); 6100 6101 /// \brief Force an expression with unknown-type to an expression of the 6102 /// given type. 6103 ExprResult forceUnknownAnyToType(Expr *E, QualType ToType); 6104 6105 // CheckVectorCast - check type constraints for vectors. 6106 // Since vectors are an extension, there are no C standard reference for this. 6107 // We allow casting between vectors and integer datatypes of the same size. 6108 // returns true if the cast is invalid 6109 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 6110 CastKind &Kind); 6111 6112 // CheckExtVectorCast - check type constraints for extended vectors. 6113 // Since vectors are an extension, there are no C standard reference for this. 6114 // We allow casting between vectors and integer datatypes of the same size, 6115 // or vectors and the element type of that vector. 6116 // returns the cast expr 6117 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr, 6118 CastKind &Kind); 6119 6120 ExprResult BuildCXXFunctionalCastExpr(TypeSourceInfo *TInfo, 6121 SourceLocation LParenLoc, 6122 Expr *CastExpr, 6123 SourceLocation RParenLoc); 6124 6125 enum ARCConversionResult { ACR_okay, ACR_unbridged }; 6126 6127 /// \brief Checks for invalid conversions and casts between 6128 /// retainable pointers and other pointer kinds. 6129 ARCConversionResult CheckObjCARCConversion(SourceRange castRange, 6130 QualType castType, Expr *&op, 6131 CheckedConversionKind CCK); 6132 6133 Expr *stripARCUnbridgedCast(Expr *e); 6134 void diagnoseARCUnbridgedCast(Expr *e); 6135 6136 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 6137 QualType ExprType); 6138 6139 /// checkRetainCycles - Check whether an Objective-C message send 6140 /// might create an obvious retain cycle. 6141 void checkRetainCycles(ObjCMessageExpr *msg); 6142 void checkRetainCycles(Expr *receiver, Expr *argument); 6143 6144 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 6145 /// to weak/__unsafe_unretained type. 6146 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 6147 6148 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 6149 /// to weak/__unsafe_unretained expression. 6150 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 6151 6152 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 6153 /// \param Method - May be null. 6154 /// \param [out] ReturnType - The return type of the send. 6155 /// \return true iff there were any incompatible types. 6156 bool CheckMessageArgumentTypes(QualType ReceiverType, 6157 Expr **Args, unsigned NumArgs, Selector Sel, 6158 ObjCMethodDecl *Method, bool isClassMessage, 6159 bool isSuperMessage, 6160 SourceLocation lbrac, SourceLocation rbrac, 6161 QualType &ReturnType, ExprValueKind &VK); 6162 6163 /// \brief Determine the result of a message send expression based on 6164 /// the type of the receiver, the method expected to receive the message, 6165 /// and the form of the message send. 6166 QualType getMessageSendResultType(QualType ReceiverType, 6167 ObjCMethodDecl *Method, 6168 bool isClassMessage, bool isSuperMessage); 6169 6170 /// \brief If the given expression involves a message send to a method 6171 /// with a related result type, emit a note describing what happened. 6172 void EmitRelatedResultTypeNote(const Expr *E); 6173 6174 /// CheckBooleanCondition - Diagnose problems involving the use of 6175 /// the given expression as a boolean condition (e.g. in an if 6176 /// statement). Also performs the standard function and array 6177 /// decays, possibly changing the input variable. 6178 /// 6179 /// \param Loc - A location associated with the condition, e.g. the 6180 /// 'if' keyword. 6181 /// \return true iff there were any errors 6182 ExprResult CheckBooleanCondition(Expr *E, SourceLocation Loc); 6183 6184 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 6185 Expr *SubExpr); 6186 6187 /// DiagnoseAssignmentAsCondition - Given that an expression is 6188 /// being used as a boolean condition, warn if it's an assignment. 6189 void DiagnoseAssignmentAsCondition(Expr *E); 6190 6191 /// \brief Redundant parentheses over an equality comparison can indicate 6192 /// that the user intended an assignment used as condition. 6193 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE); 6194 6195 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 6196 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 6197 6198 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 6199 /// the specified width and sign. If an overflow occurs, detect it and emit 6200 /// the specified diagnostic. 6201 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 6202 unsigned NewWidth, bool NewSign, 6203 SourceLocation Loc, unsigned DiagID); 6204 6205 /// Checks that the Objective-C declaration is declared in the global scope. 6206 /// Emits an error and marks the declaration as invalid if it's not declared 6207 /// in the global scope. 6208 bool CheckObjCDeclScope(Decl *D); 6209 6210 /// VerifyIntegerConstantExpression - Verifies that an expression is an ICE, 6211 /// and reports the appropriate diagnostics. Returns false on success. 6212 /// Can optionally return the value of the expression. 6213 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, 6214 PartialDiagnostic Diag, 6215 bool AllowFold, 6216 PartialDiagnostic FoldDiag); 6217 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, 6218 PartialDiagnostic Diag, 6219 bool AllowFold = true) { 6220 return VerifyIntegerConstantExpression(E, Result, Diag, AllowFold, 6221 PDiag(0)); 6222 } 6223 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result = 0); 6224 6225 /// VerifyBitField - verifies that a bit field expression is an ICE and has 6226 /// the correct width, and that the field type is valid. 6227 /// Returns false on success. 6228 /// Can optionally return whether the bit-field is of width 0 6229 ExprResult VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 6230 QualType FieldTy, Expr *BitWidth, 6231 bool *ZeroWidth = 0); 6232 6233 enum CUDAFunctionTarget { 6234 CFT_Device, 6235 CFT_Global, 6236 CFT_Host, 6237 CFT_HostDevice 6238 }; 6239 6240 CUDAFunctionTarget IdentifyCUDATarget(const FunctionDecl *D); 6241 6242 bool CheckCUDATarget(CUDAFunctionTarget CallerTarget, 6243 CUDAFunctionTarget CalleeTarget); 6244 6245 bool CheckCUDATarget(const FunctionDecl *Caller, const FunctionDecl *Callee) { 6246 return CheckCUDATarget(IdentifyCUDATarget(Caller), 6247 IdentifyCUDATarget(Callee)); 6248 } 6249 6250 /// \name Code completion 6251 //@{ 6252 /// \brief Describes the context in which code completion occurs. 6253 enum ParserCompletionContext { 6254 /// \brief Code completion occurs at top-level or namespace context. 6255 PCC_Namespace, 6256 /// \brief Code completion occurs within a class, struct, or union. 6257 PCC_Class, 6258 /// \brief Code completion occurs within an Objective-C interface, protocol, 6259 /// or category. 6260 PCC_ObjCInterface, 6261 /// \brief Code completion occurs within an Objective-C implementation or 6262 /// category implementation 6263 PCC_ObjCImplementation, 6264 /// \brief Code completion occurs within the list of instance variables 6265 /// in an Objective-C interface, protocol, category, or implementation. 6266 PCC_ObjCInstanceVariableList, 6267 /// \brief Code completion occurs following one or more template 6268 /// headers. 6269 PCC_Template, 6270 /// \brief Code completion occurs following one or more template 6271 /// headers within a class. 6272 PCC_MemberTemplate, 6273 /// \brief Code completion occurs within an expression. 6274 PCC_Expression, 6275 /// \brief Code completion occurs within a statement, which may 6276 /// also be an expression or a declaration. 6277 PCC_Statement, 6278 /// \brief Code completion occurs at the beginning of the 6279 /// initialization statement (or expression) in a for loop. 6280 PCC_ForInit, 6281 /// \brief Code completion occurs within the condition of an if, 6282 /// while, switch, or for statement. 6283 PCC_Condition, 6284 /// \brief Code completion occurs within the body of a function on a 6285 /// recovery path, where we do not have a specific handle on our position 6286 /// in the grammar. 6287 PCC_RecoveryInFunction, 6288 /// \brief Code completion occurs where only a type is permitted. 6289 PCC_Type, 6290 /// \brief Code completion occurs in a parenthesized expression, which 6291 /// might also be a type cast. 6292 PCC_ParenthesizedExpression, 6293 /// \brief Code completion occurs within a sequence of declaration 6294 /// specifiers within a function, method, or block. 6295 PCC_LocalDeclarationSpecifiers 6296 }; 6297 6298 void CodeCompleteModuleImport(SourceLocation ImportLoc, ModuleIdPath Path); 6299 void CodeCompleteOrdinaryName(Scope *S, 6300 ParserCompletionContext CompletionContext); 6301 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 6302 bool AllowNonIdentifiers, 6303 bool AllowNestedNameSpecifiers); 6304 6305 struct CodeCompleteExpressionData; 6306 void CodeCompleteExpression(Scope *S, 6307 const CodeCompleteExpressionData &Data); 6308 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 6309 SourceLocation OpLoc, 6310 bool IsArrow); 6311 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 6312 void CodeCompleteTag(Scope *S, unsigned TagSpec); 6313 void CodeCompleteTypeQualifiers(DeclSpec &DS); 6314 void CodeCompleteCase(Scope *S); 6315 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 6316 void CodeCompleteInitializer(Scope *S, Decl *D); 6317 void CodeCompleteReturn(Scope *S); 6318 void CodeCompleteAfterIf(Scope *S); 6319 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 6320 6321 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 6322 bool EnteringContext); 6323 void CodeCompleteUsing(Scope *S); 6324 void CodeCompleteUsingDirective(Scope *S); 6325 void CodeCompleteNamespaceDecl(Scope *S); 6326 void CodeCompleteNamespaceAliasDecl(Scope *S); 6327 void CodeCompleteOperatorName(Scope *S); 6328 void CodeCompleteConstructorInitializer(Decl *Constructor, 6329 CXXCtorInitializer** Initializers, 6330 unsigned NumInitializers); 6331 void CodeCompleteLambdaIntroducer(Scope *S, LambdaIntroducer &Intro, 6332 bool AfterAmpersand); 6333 6334 void CodeCompleteObjCAtDirective(Scope *S); 6335 void CodeCompleteObjCAtVisibility(Scope *S); 6336 void CodeCompleteObjCAtStatement(Scope *S); 6337 void CodeCompleteObjCAtExpression(Scope *S); 6338 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 6339 void CodeCompleteObjCPropertyGetter(Scope *S); 6340 void CodeCompleteObjCPropertySetter(Scope *S); 6341 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 6342 bool IsParameter); 6343 void CodeCompleteObjCMessageReceiver(Scope *S); 6344 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 6345 IdentifierInfo **SelIdents, 6346 unsigned NumSelIdents, 6347 bool AtArgumentExpression); 6348 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 6349 IdentifierInfo **SelIdents, 6350 unsigned NumSelIdents, 6351 bool AtArgumentExpression, 6352 bool IsSuper = false); 6353 void CodeCompleteObjCInstanceMessage(Scope *S, Expr *Receiver, 6354 IdentifierInfo **SelIdents, 6355 unsigned NumSelIdents, 6356 bool AtArgumentExpression, 6357 ObjCInterfaceDecl *Super = 0); 6358 void CodeCompleteObjCForCollection(Scope *S, 6359 DeclGroupPtrTy IterationVar); 6360 void CodeCompleteObjCSelector(Scope *S, 6361 IdentifierInfo **SelIdents, 6362 unsigned NumSelIdents); 6363 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 6364 unsigned NumProtocols); 6365 void CodeCompleteObjCProtocolDecl(Scope *S); 6366 void CodeCompleteObjCInterfaceDecl(Scope *S); 6367 void CodeCompleteObjCSuperclass(Scope *S, 6368 IdentifierInfo *ClassName, 6369 SourceLocation ClassNameLoc); 6370 void CodeCompleteObjCImplementationDecl(Scope *S); 6371 void CodeCompleteObjCInterfaceCategory(Scope *S, 6372 IdentifierInfo *ClassName, 6373 SourceLocation ClassNameLoc); 6374 void CodeCompleteObjCImplementationCategory(Scope *S, 6375 IdentifierInfo *ClassName, 6376 SourceLocation ClassNameLoc); 6377 void CodeCompleteObjCPropertyDefinition(Scope *S); 6378 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 6379 IdentifierInfo *PropertyName); 6380 void CodeCompleteObjCMethodDecl(Scope *S, 6381 bool IsInstanceMethod, 6382 ParsedType ReturnType); 6383 void CodeCompleteObjCMethodDeclSelector(Scope *S, 6384 bool IsInstanceMethod, 6385 bool AtParameterName, 6386 ParsedType ReturnType, 6387 IdentifierInfo **SelIdents, 6388 unsigned NumSelIdents); 6389 void CodeCompletePreprocessorDirective(bool InConditional); 6390 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 6391 void CodeCompletePreprocessorMacroName(bool IsDefinition); 6392 void CodeCompletePreprocessorExpression(); 6393 void CodeCompletePreprocessorMacroArgument(Scope *S, 6394 IdentifierInfo *Macro, 6395 MacroInfo *MacroInfo, 6396 unsigned Argument); 6397 void CodeCompleteNaturalLanguage(); 6398 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 6399 SmallVectorImpl<CodeCompletionResult> &Results); 6400 //@} 6401 6402 //===--------------------------------------------------------------------===// 6403 // Extra semantic analysis beyond the C type system 6404 6405public: 6406 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 6407 unsigned ByteNo) const; 6408 6409private: 6410 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr, 6411 const ArraySubscriptExpr *ASE=0, 6412 bool AllowOnePastEnd=true, bool IndexNegated=false); 6413 void CheckArrayAccess(const Expr *E); 6414 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 6415 bool CheckObjCMethodCall(ObjCMethodDecl *Method, SourceLocation loc, 6416 Expr **Args, unsigned NumArgs); 6417 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 6418 6419 bool CheckObjCString(Expr *Arg); 6420 6421 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6422 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6423 6424 bool SemaBuiltinVAStart(CallExpr *TheCall); 6425 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 6426 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 6427 6428public: 6429 // Used by C++ template instantiation. 6430 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 6431 6432private: 6433 bool SemaBuiltinPrefetch(CallExpr *TheCall); 6434 bool SemaBuiltinObjectSize(CallExpr *TheCall); 6435 bool SemaBuiltinLongjmp(CallExpr *TheCall); 6436 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 6437 ExprResult SemaAtomicOpsOverloaded(ExprResult TheCallResult, 6438 AtomicExpr::AtomicOp Op); 6439 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 6440 llvm::APSInt &Result); 6441 6442 enum FormatStringType { 6443 FST_Scanf, 6444 FST_Printf, 6445 FST_NSString, 6446 FST_Strftime, 6447 FST_Strfmon, 6448 FST_Kprintf, 6449 FST_Unknown 6450 }; 6451 static FormatStringType GetFormatStringType(const FormatAttr *Format); 6452 bool SemaCheckStringLiteral(const Expr *E, Expr **Args, unsigned NumArgs, 6453 bool HasVAListArg, unsigned format_idx, 6454 unsigned firstDataArg, FormatStringType Type, 6455 bool inFunctionCall = true); 6456 6457 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 6458 Expr **Args, unsigned NumArgs, bool HasVAListArg, 6459 unsigned format_idx, unsigned firstDataArg, 6460 FormatStringType Type, bool inFunctionCall); 6461 6462 void CheckFormatArguments(const FormatAttr *Format, CallExpr *TheCall); 6463 void CheckFormatArguments(const FormatAttr *Format, Expr **Args, 6464 unsigned NumArgs, bool IsCXXMember, 6465 SourceLocation Loc, SourceRange Range); 6466 void CheckFormatArguments(Expr **Args, unsigned NumArgs, 6467 bool HasVAListArg, unsigned format_idx, 6468 unsigned firstDataArg, FormatStringType Type, 6469 SourceLocation Loc, SourceRange range); 6470 6471 void CheckNonNullArguments(const NonNullAttr *NonNull, 6472 const Expr * const *ExprArgs, 6473 SourceLocation CallSiteLoc); 6474 6475 void CheckMemaccessArguments(const CallExpr *Call, 6476 unsigned BId, 6477 IdentifierInfo *FnName); 6478 6479 void CheckStrlcpycatArguments(const CallExpr *Call, 6480 IdentifierInfo *FnName); 6481 6482 void CheckStrncatArguments(const CallExpr *Call, 6483 IdentifierInfo *FnName); 6484 6485 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 6486 SourceLocation ReturnLoc); 6487 void CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr* RHS); 6488 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 6489 6490 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 6491 Expr *Init); 6492 6493 /// \brief The parser's current scope. 6494 /// 6495 /// The parser maintains this state here. 6496 Scope *CurScope; 6497 6498protected: 6499 friend class Parser; 6500 friend class InitializationSequence; 6501 friend class ASTReader; 6502 friend class ASTWriter; 6503 6504public: 6505 /// \brief Retrieve the parser's current scope. 6506 /// 6507 /// This routine must only be used when it is certain that semantic analysis 6508 /// and the parser are in precisely the same context, which is not the case 6509 /// when, e.g., we are performing any kind of template instantiation. 6510 /// Therefore, the only safe places to use this scope are in the parser 6511 /// itself and in routines directly invoked from the parser and *never* from 6512 /// template substitution or instantiation. 6513 Scope *getCurScope() const { return CurScope; } 6514 6515 Decl *getObjCDeclContext() const; 6516 6517 DeclContext *getCurLexicalContext() const { 6518 return OriginalLexicalContext ? OriginalLexicalContext : CurContext; 6519 } 6520 6521 AvailabilityResult getCurContextAvailability() const; 6522}; 6523 6524/// \brief RAII object that enters a new expression evaluation context. 6525class EnterExpressionEvaluationContext { 6526 Sema &Actions; 6527 6528public: 6529 EnterExpressionEvaluationContext(Sema &Actions, 6530 Sema::ExpressionEvaluationContext NewContext) 6531 : Actions(Actions) { 6532 Actions.PushExpressionEvaluationContext(NewContext); 6533 } 6534 6535 ~EnterExpressionEvaluationContext() { 6536 Actions.PopExpressionEvaluationContext(); 6537 } 6538}; 6539 6540} // end namespace clang 6541 6542#endif 6543