Sema.h revision 68932845a432d2a1dbbc57a84fd85bbb37c90487
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 1705 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1706 CXXSpecialMember SM, 1707 bool ConstArg, 1708 bool VolatileArg, 1709 bool RValueThis, 1710 bool ConstThis, 1711 bool VolatileThis); 1712 1713private: 1714 bool CppLookupName(LookupResult &R, Scope *S); 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 Given a variable, determine the type that a reference to that 2331 /// variable will have in the given scope. 2332 QualType getCapturedDeclRefType(VarDecl *Var, SourceLocation Loc); 2333 2334 /// \brief Determine the type of the field that will capture the 2335 /// given variable in a lambda expression. 2336 /// 2337 /// \param T The type of the variable being captured. 2338 /// \param ByRef Whether we are capturing by reference or by value. 2339 QualType getLambdaCaptureFieldType(QualType T, bool ByRef); 2340 2341 enum TryCaptureKind { 2342 TryCapture_Implicit, TryCapture_ExplicitByVal, TryCapture_ExplicitByRef 2343 }; 2344 void TryCaptureVar(VarDecl *var, SourceLocation loc, 2345 TryCaptureKind Kind = TryCapture_Implicit, 2346 SourceLocation EllipsisLoc = SourceLocation()); 2347 2348 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2349 void MarkDeclarationsReferencedInExpr(Expr *E); 2350 2351 /// \brief Try to recover by turning the given expression into a 2352 /// call. Returns true if recovery was attempted or an error was 2353 /// emitted; this may also leave the ExprResult invalid. 2354 bool tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD, 2355 bool ForceComplain = false, 2356 bool (*IsPlausibleResult)(QualType) = 0); 2357 2358 /// \brief Figure out if an expression could be turned into a call. 2359 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2360 UnresolvedSetImpl &NonTemplateOverloads); 2361 2362 /// \brief Conditionally issue a diagnostic based on the current 2363 /// evaluation context. 2364 /// 2365 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2366 /// the function body is parsed, and then do a basic reachability analysis to 2367 /// determine if the statement is reachable. If it is unreachable, the 2368 /// diagnostic will not be emitted. 2369 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement, 2370 const PartialDiagnostic &PD); 2371 2372 // Primary Expressions. 2373 SourceRange getExprRange(Expr *E) const; 2374 2375 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, 2376 SourceLocation TemplateKWLoc, 2377 UnqualifiedId &Id, 2378 bool HasTrailingLParen, bool IsAddressOfOperand, 2379 CorrectionCandidateCallback *CCC = 0); 2380 2381 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2382 TemplateArgumentListInfo &Buffer, 2383 DeclarationNameInfo &NameInfo, 2384 const TemplateArgumentListInfo *&TemplateArgs); 2385 2386 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2387 CorrectionCandidateCallback &CCC, 2388 TemplateArgumentListInfo *ExplicitTemplateArgs = 0, 2389 Expr **Args = 0, unsigned NumArgs = 0); 2390 2391 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S, 2392 IdentifierInfo *II, 2393 bool AllowBuiltinCreation=false); 2394 2395 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2396 SourceLocation TemplateKWLoc, 2397 const DeclarationNameInfo &NameInfo, 2398 bool isAddressOfOperand, 2399 const TemplateArgumentListInfo *TemplateArgs); 2400 2401 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2402 ExprValueKind VK, 2403 SourceLocation Loc, 2404 const CXXScopeSpec *SS = 0); 2405 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2406 ExprValueKind VK, 2407 const DeclarationNameInfo &NameInfo, 2408 const CXXScopeSpec *SS = 0); 2409 ExprResult 2410 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2411 SourceLocation nameLoc, 2412 IndirectFieldDecl *indirectField, 2413 Expr *baseObjectExpr = 0, 2414 SourceLocation opLoc = SourceLocation()); 2415 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2416 SourceLocation TemplateKWLoc, 2417 LookupResult &R, 2418 const TemplateArgumentListInfo *TemplateArgs); 2419 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2420 SourceLocation TemplateKWLoc, 2421 LookupResult &R, 2422 const TemplateArgumentListInfo *TemplateArgs, 2423 bool IsDefiniteInstance); 2424 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2425 const LookupResult &R, 2426 bool HasTrailingLParen); 2427 2428 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2429 const DeclarationNameInfo &NameInfo); 2430 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2431 SourceLocation TemplateKWLoc, 2432 const DeclarationNameInfo &NameInfo, 2433 const TemplateArgumentListInfo *TemplateArgs); 2434 2435 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2436 LookupResult &R, 2437 bool NeedsADL); 2438 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2439 const DeclarationNameInfo &NameInfo, 2440 NamedDecl *D); 2441 2442 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2443 ExprResult ActOnNumericConstant(const Token &Tok); 2444 ExprResult ActOnCharacterConstant(const Token &Tok); 2445 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E); 2446 ExprResult ActOnParenListExpr(SourceLocation L, 2447 SourceLocation R, 2448 MultiExprArg Val); 2449 2450 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2451 /// fragments (e.g. "foo" "bar" L"baz"). 2452 ExprResult ActOnStringLiteral(const Token *StringToks, 2453 unsigned NumStringToks); 2454 2455 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2456 SourceLocation DefaultLoc, 2457 SourceLocation RParenLoc, 2458 Expr *ControllingExpr, 2459 MultiTypeArg ArgTypes, 2460 MultiExprArg ArgExprs); 2461 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2462 SourceLocation DefaultLoc, 2463 SourceLocation RParenLoc, 2464 Expr *ControllingExpr, 2465 TypeSourceInfo **Types, 2466 Expr **Exprs, 2467 unsigned NumAssocs); 2468 2469 // Binary/Unary Operators. 'Tok' is the token for the operator. 2470 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2471 Expr *InputExpr); 2472 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2473 UnaryOperatorKind Opc, Expr *Input); 2474 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2475 tok::TokenKind Op, Expr *Input); 2476 2477 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo, 2478 SourceLocation OpLoc, 2479 UnaryExprOrTypeTrait ExprKind, 2480 SourceRange R); 2481 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2482 UnaryExprOrTypeTrait ExprKind); 2483 ExprResult 2484 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2485 UnaryExprOrTypeTrait ExprKind, 2486 bool IsType, void *TyOrEx, 2487 const SourceRange &ArgRange); 2488 2489 ExprResult CheckPlaceholderExpr(Expr *E); 2490 bool CheckVecStepExpr(Expr *E); 2491 2492 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2493 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc, 2494 SourceRange ExprRange, 2495 UnaryExprOrTypeTrait ExprKind); 2496 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2497 SourceLocation OpLoc, 2498 IdentifierInfo &Name, 2499 SourceLocation NameLoc, 2500 SourceLocation RParenLoc); 2501 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2502 tok::TokenKind Kind, Expr *Input); 2503 2504 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2505 Expr *Idx, SourceLocation RLoc); 2506 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2507 Expr *Idx, SourceLocation RLoc); 2508 2509 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2510 SourceLocation OpLoc, bool IsArrow, 2511 CXXScopeSpec &SS, 2512 SourceLocation TemplateKWLoc, 2513 NamedDecl *FirstQualifierInScope, 2514 const DeclarationNameInfo &NameInfo, 2515 const TemplateArgumentListInfo *TemplateArgs); 2516 2517 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2518 SourceLocation OpLoc, bool IsArrow, 2519 const CXXScopeSpec &SS, 2520 SourceLocation TemplateKWLoc, 2521 NamedDecl *FirstQualifierInScope, 2522 LookupResult &R, 2523 const TemplateArgumentListInfo *TemplateArgs, 2524 bool SuppressQualifierCheck = false); 2525 2526 ExprResult PerformMemberExprBaseConversion(Expr *Base, bool IsArrow); 2527 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2528 bool &IsArrow, SourceLocation OpLoc, 2529 CXXScopeSpec &SS, 2530 Decl *ObjCImpDecl, 2531 bool HasTemplateArgs); 2532 2533 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2534 const CXXScopeSpec &SS, 2535 const LookupResult &R); 2536 2537 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2538 bool IsArrow, SourceLocation OpLoc, 2539 const CXXScopeSpec &SS, 2540 SourceLocation TemplateKWLoc, 2541 NamedDecl *FirstQualifierInScope, 2542 const DeclarationNameInfo &NameInfo, 2543 const TemplateArgumentListInfo *TemplateArgs); 2544 2545 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2546 SourceLocation OpLoc, 2547 tok::TokenKind OpKind, 2548 CXXScopeSpec &SS, 2549 SourceLocation TemplateKWLoc, 2550 UnqualifiedId &Member, 2551 Decl *ObjCImpDecl, 2552 bool HasTrailingLParen); 2553 2554 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2555 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2556 FunctionDecl *FDecl, 2557 const FunctionProtoType *Proto, 2558 Expr **Args, unsigned NumArgs, 2559 SourceLocation RParenLoc, 2560 bool ExecConfig = false); 2561 void CheckStaticArrayArgument(SourceLocation CallLoc, 2562 ParmVarDecl *Param, 2563 const Expr *ArgExpr); 2564 2565 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2566 /// This provides the location of the left/right parens and a list of comma 2567 /// locations. 2568 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2569 MultiExprArg ArgExprs, SourceLocation RParenLoc, 2570 Expr *ExecConfig = 0, bool IsExecConfig = false); 2571 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2572 SourceLocation LParenLoc, 2573 Expr **Args, unsigned NumArgs, 2574 SourceLocation RParenLoc, 2575 Expr *Config = 0, 2576 bool IsExecConfig = false); 2577 2578 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2579 MultiExprArg ExecConfig, 2580 SourceLocation GGGLoc); 2581 2582 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2583 Declarator &D, ParsedType &Ty, 2584 SourceLocation RParenLoc, Expr *CastExpr); 2585 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2586 TypeSourceInfo *Ty, 2587 SourceLocation RParenLoc, 2588 Expr *Op); 2589 CastKind PrepareScalarCast(ExprResult &src, QualType destType); 2590 2591 /// \brief Build an altivec or OpenCL literal. 2592 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2593 SourceLocation RParenLoc, Expr *E, 2594 TypeSourceInfo *TInfo); 2595 2596 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2597 2598 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2599 ParsedType Ty, 2600 SourceLocation RParenLoc, 2601 Expr *InitExpr); 2602 2603 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2604 TypeSourceInfo *TInfo, 2605 SourceLocation RParenLoc, 2606 Expr *LiteralExpr); 2607 2608 ExprResult ActOnInitList(SourceLocation LBraceLoc, 2609 MultiExprArg InitArgList, 2610 SourceLocation RBraceLoc); 2611 2612 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2613 SourceLocation Loc, 2614 bool GNUSyntax, 2615 ExprResult Init); 2616 2617 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2618 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr); 2619 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2620 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr); 2621 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc, 2622 Expr *LHSExpr, Expr *RHSExpr); 2623 2624 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2625 /// in the case of a the GNU conditional expr extension. 2626 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2627 SourceLocation ColonLoc, 2628 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr); 2629 2630 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2631 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2632 LabelDecl *TheDecl); 2633 2634 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2635 SourceLocation RPLoc); // "({..})" 2636 2637 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2638 struct OffsetOfComponent { 2639 SourceLocation LocStart, LocEnd; 2640 bool isBrackets; // true if [expr], false if .ident 2641 union { 2642 IdentifierInfo *IdentInfo; 2643 Expr *E; 2644 } U; 2645 }; 2646 2647 /// __builtin_offsetof(type, a.b[123][456].c) 2648 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2649 TypeSourceInfo *TInfo, 2650 OffsetOfComponent *CompPtr, 2651 unsigned NumComponents, 2652 SourceLocation RParenLoc); 2653 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2654 SourceLocation BuiltinLoc, 2655 SourceLocation TypeLoc, 2656 ParsedType ParsedArgTy, 2657 OffsetOfComponent *CompPtr, 2658 unsigned NumComponents, 2659 SourceLocation RParenLoc); 2660 2661 // __builtin_choose_expr(constExpr, expr1, expr2) 2662 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2663 Expr *CondExpr, Expr *LHSExpr, 2664 Expr *RHSExpr, SourceLocation RPLoc); 2665 2666 // __builtin_va_arg(expr, type) 2667 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, 2668 SourceLocation RPLoc); 2669 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E, 2670 TypeSourceInfo *TInfo, SourceLocation RPLoc); 2671 2672 // __null 2673 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2674 2675 bool CheckCaseExpression(Expr *E); 2676 2677 /// \brief Describes the result of an "if-exists" condition check. 2678 enum IfExistsResult { 2679 /// \brief The symbol exists. 2680 IER_Exists, 2681 2682 /// \brief The symbol does not exist. 2683 IER_DoesNotExist, 2684 2685 /// \brief The name is a dependent name, so the results will differ 2686 /// from one instantiation to the next. 2687 IER_Dependent, 2688 2689 /// \brief An error occurred. 2690 IER_Error 2691 }; 2692 2693 IfExistsResult 2694 CheckMicrosoftIfExistsSymbol(Scope *S, CXXScopeSpec &SS, 2695 const DeclarationNameInfo &TargetNameInfo); 2696 2697 IfExistsResult 2698 CheckMicrosoftIfExistsSymbol(Scope *S, SourceLocation KeywordLoc, 2699 bool IsIfExists, CXXScopeSpec &SS, 2700 UnqualifiedId &Name); 2701 2702 StmtResult BuildMSDependentExistsStmt(SourceLocation KeywordLoc, 2703 bool IsIfExists, 2704 NestedNameSpecifierLoc QualifierLoc, 2705 DeclarationNameInfo NameInfo, 2706 Stmt *Nested); 2707 StmtResult ActOnMSDependentExistsStmt(SourceLocation KeywordLoc, 2708 bool IsIfExists, 2709 CXXScopeSpec &SS, UnqualifiedId &Name, 2710 Stmt *Nested); 2711 2712 //===------------------------- "Block" Extension ------------------------===// 2713 2714 /// ActOnBlockStart - This callback is invoked when a block literal is 2715 /// started. 2716 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2717 2718 /// ActOnBlockArguments - This callback allows processing of block arguments. 2719 /// If there are no arguments, this is still invoked. 2720 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2721 2722 /// ActOnBlockError - If there is an error parsing a block, this callback 2723 /// is invoked to pop the information about the block from the action impl. 2724 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2725 2726 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2727 /// literal was successfully completed. ^(int x){...} 2728 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body, 2729 Scope *CurScope); 2730 2731 //===---------------------------- OpenCL Features -----------------------===// 2732 2733 /// __builtin_astype(...) 2734 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, 2735 SourceLocation BuiltinLoc, 2736 SourceLocation RParenLoc); 2737 2738 //===---------------------------- C++ Features --------------------------===// 2739 2740 // Act on C++ namespaces 2741 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2742 SourceLocation NamespaceLoc, 2743 SourceLocation IdentLoc, 2744 IdentifierInfo *Ident, 2745 SourceLocation LBrace, 2746 AttributeList *AttrList); 2747 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2748 2749 NamespaceDecl *getStdNamespace() const; 2750 NamespaceDecl *getOrCreateStdNamespace(); 2751 2752 CXXRecordDecl *getStdBadAlloc() const; 2753 2754 /// \brief Tests whether Ty is an instance of std::initializer_list and, if 2755 /// it is and Element is not NULL, assigns the element type to Element. 2756 bool isStdInitializerList(QualType Ty, QualType *Element); 2757 2758 /// \brief Looks for the std::initializer_list template and instantiates it 2759 /// with Element, or emits an error if it's not found. 2760 /// 2761 /// \returns The instantiated template, or null on error. 2762 QualType BuildStdInitializerList(QualType Element, SourceLocation Loc); 2763 2764 /// \brief Determine whether Ctor is an initializer-list constructor, as 2765 /// defined in [dcl.init.list]p2. 2766 bool isInitListConstructor(const CXXConstructorDecl *Ctor); 2767 2768 Decl *ActOnUsingDirective(Scope *CurScope, 2769 SourceLocation UsingLoc, 2770 SourceLocation NamespcLoc, 2771 CXXScopeSpec &SS, 2772 SourceLocation IdentLoc, 2773 IdentifierInfo *NamespcName, 2774 AttributeList *AttrList); 2775 2776 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2777 2778 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2779 SourceLocation NamespaceLoc, 2780 SourceLocation AliasLoc, 2781 IdentifierInfo *Alias, 2782 CXXScopeSpec &SS, 2783 SourceLocation IdentLoc, 2784 IdentifierInfo *Ident); 2785 2786 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2787 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2788 const LookupResult &PreviousDecls); 2789 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2790 NamedDecl *Target); 2791 2792 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2793 bool isTypeName, 2794 const CXXScopeSpec &SS, 2795 SourceLocation NameLoc, 2796 const LookupResult &Previous); 2797 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2798 const CXXScopeSpec &SS, 2799 SourceLocation NameLoc); 2800 2801 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2802 SourceLocation UsingLoc, 2803 CXXScopeSpec &SS, 2804 const DeclarationNameInfo &NameInfo, 2805 AttributeList *AttrList, 2806 bool IsInstantiation, 2807 bool IsTypeName, 2808 SourceLocation TypenameLoc); 2809 2810 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2811 2812 Decl *ActOnUsingDeclaration(Scope *CurScope, 2813 AccessSpecifier AS, 2814 bool HasUsingKeyword, 2815 SourceLocation UsingLoc, 2816 CXXScopeSpec &SS, 2817 UnqualifiedId &Name, 2818 AttributeList *AttrList, 2819 bool IsTypeName, 2820 SourceLocation TypenameLoc); 2821 Decl *ActOnAliasDeclaration(Scope *CurScope, 2822 AccessSpecifier AS, 2823 MultiTemplateParamsArg TemplateParams, 2824 SourceLocation UsingLoc, 2825 UnqualifiedId &Name, 2826 TypeResult Type); 2827 2828 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2829 /// and sets it as the initializer for the the passed in VarDecl. 2830 bool InitializeVarWithConstructor(VarDecl *VD, 2831 CXXConstructorDecl *Constructor, 2832 MultiExprArg Exprs, 2833 bool HadMultipleCandidates); 2834 2835 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2836 /// including handling of its default argument expressions. 2837 /// 2838 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2839 ExprResult 2840 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2841 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2842 bool HadMultipleCandidates, bool RequiresZeroInit, 2843 unsigned ConstructKind, SourceRange ParenRange); 2844 2845 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2846 // the constructor can be elidable? 2847 ExprResult 2848 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2849 CXXConstructorDecl *Constructor, bool Elidable, 2850 MultiExprArg Exprs, bool HadMultipleCandidates, 2851 bool RequiresZeroInit, unsigned ConstructKind, 2852 SourceRange ParenRange); 2853 2854 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2855 /// the default expr if needed. 2856 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2857 FunctionDecl *FD, 2858 ParmVarDecl *Param); 2859 2860 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2861 /// constructed variable. 2862 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2863 2864 /// \brief Helper class that collects exception specifications for 2865 /// implicitly-declared special member functions. 2866 class ImplicitExceptionSpecification { 2867 // Pointer to allow copying 2868 ASTContext *Context; 2869 // We order exception specifications thus: 2870 // noexcept is the most restrictive, but is only used in C++0x. 2871 // throw() comes next. 2872 // Then a throw(collected exceptions) 2873 // Finally no specification. 2874 // throw(...) is used instead if any called function uses it. 2875 // 2876 // If this exception specification cannot be known yet (for instance, 2877 // because this is the exception specification for a defaulted default 2878 // constructor and we haven't finished parsing the deferred parts of the 2879 // class yet), the C++0x standard does not specify how to behave. We 2880 // record this as an 'unknown' exception specification, which overrules 2881 // any other specification (even 'none', to keep this rule simple). 2882 ExceptionSpecificationType ComputedEST; 2883 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2884 SmallVector<QualType, 4> Exceptions; 2885 2886 void ClearExceptions() { 2887 ExceptionsSeen.clear(); 2888 Exceptions.clear(); 2889 } 2890 2891 public: 2892 explicit ImplicitExceptionSpecification(ASTContext &Context) 2893 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2894 if (!Context.getLangOptions().CPlusPlus0x) 2895 ComputedEST = EST_DynamicNone; 2896 } 2897 2898 /// \brief Get the computed exception specification type. 2899 ExceptionSpecificationType getExceptionSpecType() const { 2900 assert(ComputedEST != EST_ComputedNoexcept && 2901 "noexcept(expr) should not be a possible result"); 2902 return ComputedEST; 2903 } 2904 2905 /// \brief The number of exceptions in the exception specification. 2906 unsigned size() const { return Exceptions.size(); } 2907 2908 /// \brief The set of exceptions in the exception specification. 2909 const QualType *data() const { return Exceptions.data(); } 2910 2911 /// \brief Integrate another called method into the collected data. 2912 void CalledDecl(CXXMethodDecl *Method); 2913 2914 /// \brief Integrate an invoked expression into the collected data. 2915 void CalledExpr(Expr *E); 2916 2917 /// \brief Specify that the exception specification can't be detemined yet. 2918 void SetDelayed() { 2919 ClearExceptions(); 2920 ComputedEST = EST_Delayed; 2921 } 2922 2923 FunctionProtoType::ExtProtoInfo getEPI() const { 2924 FunctionProtoType::ExtProtoInfo EPI; 2925 EPI.ExceptionSpecType = getExceptionSpecType(); 2926 EPI.NumExceptions = size(); 2927 EPI.Exceptions = data(); 2928 return EPI; 2929 } 2930 }; 2931 2932 /// \brief Determine what sort of exception specification a defaulted 2933 /// copy constructor of a class will have. 2934 ImplicitExceptionSpecification 2935 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2936 2937 /// \brief Determine what sort of exception specification a defaulted 2938 /// default constructor of a class will have, and whether the parameter 2939 /// will be const. 2940 std::pair<ImplicitExceptionSpecification, bool> 2941 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2942 2943 /// \brief Determine what sort of exception specification a defautled 2944 /// copy assignment operator of a class will have, and whether the 2945 /// parameter will be const. 2946 std::pair<ImplicitExceptionSpecification, bool> 2947 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2948 2949 /// \brief Determine what sort of exception specification a defaulted move 2950 /// constructor of a class will have. 2951 ImplicitExceptionSpecification 2952 ComputeDefaultedMoveCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2953 2954 /// \brief Determine what sort of exception specification a defaulted move 2955 /// assignment operator of a class will have. 2956 ImplicitExceptionSpecification 2957 ComputeDefaultedMoveAssignmentExceptionSpec(CXXRecordDecl *ClassDecl); 2958 2959 /// \brief Determine what sort of exception specification a defaulted 2960 /// destructor of a class will have. 2961 ImplicitExceptionSpecification 2962 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 2963 2964 /// \brief Determine if a special member function should have a deleted 2965 /// definition when it is defaulted. 2966 bool ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM); 2967 2968 /// \brief Declare the implicit default constructor for the given class. 2969 /// 2970 /// \param ClassDecl The class declaration into which the implicit 2971 /// default constructor will be added. 2972 /// 2973 /// \returns The implicitly-declared default constructor. 2974 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2975 CXXRecordDecl *ClassDecl); 2976 2977 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2978 /// defining this constructor as the default constructor. 2979 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2980 CXXConstructorDecl *Constructor); 2981 2982 /// \brief Declare the implicit destructor for the given class. 2983 /// 2984 /// \param ClassDecl The class declaration into which the implicit 2985 /// destructor will be added. 2986 /// 2987 /// \returns The implicitly-declared destructor. 2988 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2989 2990 /// DefineImplicitDestructor - Checks for feasibility of 2991 /// defining this destructor as the default destructor. 2992 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2993 CXXDestructorDecl *Destructor); 2994 2995 /// \brief Build an exception spec for destructors that don't have one. 2996 /// 2997 /// C++11 says that user-defined destructors with no exception spec get one 2998 /// that looks as if the destructor was implicitly declared. 2999 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 3000 CXXDestructorDecl *Destructor); 3001 3002 /// \brief Declare all inherited constructors for the given class. 3003 /// 3004 /// \param ClassDecl The class declaration into which the inherited 3005 /// constructors will be added. 3006 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 3007 3008 /// \brief Declare the implicit copy constructor for the given class. 3009 /// 3010 /// \param ClassDecl The class declaration into which the implicit 3011 /// copy constructor will be added. 3012 /// 3013 /// \returns The implicitly-declared copy constructor. 3014 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 3015 3016 /// DefineImplicitCopyConstructor - Checks for feasibility of 3017 /// defining this constructor as the copy constructor. 3018 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 3019 CXXConstructorDecl *Constructor); 3020 3021 /// \brief Declare the implicit move constructor for the given class. 3022 /// 3023 /// \param ClassDecl The Class declaration into which the implicit 3024 /// move constructor will be added. 3025 /// 3026 /// \returns The implicitly-declared move constructor, or NULL if it wasn't 3027 /// declared. 3028 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl); 3029 3030 /// DefineImplicitMoveConstructor - Checks for feasibility of 3031 /// defining this constructor as the move constructor. 3032 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation, 3033 CXXConstructorDecl *Constructor); 3034 3035 /// \brief Declare the implicit copy assignment operator for the given class. 3036 /// 3037 /// \param ClassDecl The class declaration into which the implicit 3038 /// copy assignment operator will be added. 3039 /// 3040 /// \returns The implicitly-declared copy assignment operator. 3041 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 3042 3043 /// \brief Defines an implicitly-declared copy assignment operator. 3044 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 3045 CXXMethodDecl *MethodDecl); 3046 3047 /// \brief Declare the implicit move assignment operator for the given class. 3048 /// 3049 /// \param ClassDecl The Class declaration into which the implicit 3050 /// move assignment operator will be added. 3051 /// 3052 /// \returns The implicitly-declared move assignment operator, or NULL if it 3053 /// wasn't declared. 3054 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl); 3055 3056 /// \brief Defines an implicitly-declared move assignment operator. 3057 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation, 3058 CXXMethodDecl *MethodDecl); 3059 3060 /// \brief Force the declaration of any implicitly-declared members of this 3061 /// class. 3062 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 3063 3064 /// \brief Determine whether the given function is an implicitly-deleted 3065 /// special member function. 3066 bool isImplicitlyDeleted(FunctionDecl *FD); 3067 3068 /// MaybeBindToTemporary - If the passed in expression has a record type with 3069 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 3070 /// it simply returns the passed in expression. 3071 ExprResult MaybeBindToTemporary(Expr *E); 3072 3073 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 3074 MultiExprArg ArgsPtr, 3075 SourceLocation Loc, 3076 ASTOwningVector<Expr*> &ConvertedArgs); 3077 3078 ParsedType getDestructorName(SourceLocation TildeLoc, 3079 IdentifierInfo &II, SourceLocation NameLoc, 3080 Scope *S, CXXScopeSpec &SS, 3081 ParsedType ObjectType, 3082 bool EnteringContext); 3083 3084 ParsedType getDestructorType(const DeclSpec& DS, ParsedType ObjectType); 3085 3086 // Checks that reinterpret casts don't have undefined behavior. 3087 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 3088 bool IsDereference, SourceRange Range); 3089 3090 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 3091 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 3092 tok::TokenKind Kind, 3093 SourceLocation LAngleBracketLoc, 3094 Declarator &D, 3095 SourceLocation RAngleBracketLoc, 3096 SourceLocation LParenLoc, 3097 Expr *E, 3098 SourceLocation RParenLoc); 3099 3100 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 3101 tok::TokenKind Kind, 3102 TypeSourceInfo *Ty, 3103 Expr *E, 3104 SourceRange AngleBrackets, 3105 SourceRange Parens); 3106 3107 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3108 SourceLocation TypeidLoc, 3109 TypeSourceInfo *Operand, 3110 SourceLocation RParenLoc); 3111 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3112 SourceLocation TypeidLoc, 3113 Expr *Operand, 3114 SourceLocation RParenLoc); 3115 3116 /// ActOnCXXTypeid - Parse typeid( something ). 3117 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 3118 SourceLocation LParenLoc, bool isType, 3119 void *TyOrExpr, 3120 SourceLocation RParenLoc); 3121 3122 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3123 SourceLocation TypeidLoc, 3124 TypeSourceInfo *Operand, 3125 SourceLocation RParenLoc); 3126 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3127 SourceLocation TypeidLoc, 3128 Expr *Operand, 3129 SourceLocation RParenLoc); 3130 3131 /// ActOnCXXUuidof - Parse __uuidof( something ). 3132 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 3133 SourceLocation LParenLoc, bool isType, 3134 void *TyOrExpr, 3135 SourceLocation RParenLoc); 3136 3137 3138 //// ActOnCXXThis - Parse 'this' pointer. 3139 ExprResult ActOnCXXThis(SourceLocation loc); 3140 3141 /// \brief Try to retrieve the type of the 'this' pointer. 3142 /// 3143 /// \param Capture If true, capture 'this' in this context. 3144 /// 3145 /// \returns The type of 'this', if possible. Otherwise, returns a NULL type. 3146 QualType getCurrentThisType(); 3147 3148 /// \brief Make sure the value of 'this' is actually available in the current 3149 /// context, if it is a potentially evaluated context. 3150 /// 3151 /// \param Loc The location at which the capture of 'this' occurs. 3152 /// 3153 /// \param Explicit Whether 'this' is explicitly captured in a lambda 3154 /// capture list. 3155 void CheckCXXThisCapture(SourceLocation Loc, bool Explicit = false); 3156 3157 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 3158 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 3159 3160 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 3161 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 3162 3163 //// ActOnCXXThrow - Parse throw expressions. 3164 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 3165 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 3166 bool IsThrownVarInScope); 3167 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 3168 bool IsThrownVarInScope); 3169 3170 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 3171 /// Can be interpreted either as function-style casting ("int(x)") 3172 /// or class type construction ("ClassType(x,y,z)") 3173 /// or creation of a value-initialized type ("int()"). 3174 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 3175 SourceLocation LParenLoc, 3176 MultiExprArg Exprs, 3177 SourceLocation RParenLoc); 3178 3179 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 3180 SourceLocation LParenLoc, 3181 MultiExprArg Exprs, 3182 SourceLocation RParenLoc); 3183 3184 /// ActOnCXXNew - Parsed a C++ 'new' expression. 3185 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 3186 SourceLocation PlacementLParen, 3187 MultiExprArg PlacementArgs, 3188 SourceLocation PlacementRParen, 3189 SourceRange TypeIdParens, Declarator &D, 3190 Expr *Initializer); 3191 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 3192 SourceLocation PlacementLParen, 3193 MultiExprArg PlacementArgs, 3194 SourceLocation PlacementRParen, 3195 SourceRange TypeIdParens, 3196 QualType AllocType, 3197 TypeSourceInfo *AllocTypeInfo, 3198 Expr *ArraySize, 3199 SourceRange DirectInitRange, 3200 Expr *Initializer, 3201 bool TypeMayContainAuto = true); 3202 3203 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 3204 SourceRange R); 3205 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 3206 bool UseGlobal, QualType AllocType, bool IsArray, 3207 Expr **PlaceArgs, unsigned NumPlaceArgs, 3208 FunctionDecl *&OperatorNew, 3209 FunctionDecl *&OperatorDelete); 3210 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 3211 DeclarationName Name, Expr** Args, 3212 unsigned NumArgs, DeclContext *Ctx, 3213 bool AllowMissing, FunctionDecl *&Operator, 3214 bool Diagnose = true); 3215 void DeclareGlobalNewDelete(); 3216 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 3217 QualType Argument, 3218 bool addMallocAttr = false); 3219 3220 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 3221 DeclarationName Name, FunctionDecl* &Operator, 3222 bool Diagnose = true); 3223 3224 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 3225 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 3226 bool UseGlobal, bool ArrayForm, 3227 Expr *Operand); 3228 3229 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 3230 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 3231 SourceLocation StmtLoc, 3232 bool ConvertToBoolean); 3233 3234 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 3235 Expr *Operand, SourceLocation RParen); 3236 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 3237 SourceLocation RParen); 3238 3239 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 3240 /// pseudo-functions. 3241 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 3242 SourceLocation KWLoc, 3243 ParsedType Ty, 3244 SourceLocation RParen); 3245 3246 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3247 SourceLocation KWLoc, 3248 TypeSourceInfo *T, 3249 SourceLocation RParen); 3250 3251 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3252 /// pseudo-functions. 3253 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3254 SourceLocation KWLoc, 3255 ParsedType LhsTy, 3256 ParsedType RhsTy, 3257 SourceLocation RParen); 3258 3259 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3260 SourceLocation KWLoc, 3261 TypeSourceInfo *LhsT, 3262 TypeSourceInfo *RhsT, 3263 SourceLocation RParen); 3264 3265 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3266 /// pseudo-functions. 3267 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3268 SourceLocation KWLoc, 3269 ParsedType LhsTy, 3270 Expr *DimExpr, 3271 SourceLocation RParen); 3272 3273 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3274 SourceLocation KWLoc, 3275 TypeSourceInfo *TSInfo, 3276 Expr *DimExpr, 3277 SourceLocation RParen); 3278 3279 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3280 /// pseudo-functions. 3281 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3282 SourceLocation KWLoc, 3283 Expr *Queried, 3284 SourceLocation RParen); 3285 3286 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3287 SourceLocation KWLoc, 3288 Expr *Queried, 3289 SourceLocation RParen); 3290 3291 ExprResult ActOnStartCXXMemberReference(Scope *S, 3292 Expr *Base, 3293 SourceLocation OpLoc, 3294 tok::TokenKind OpKind, 3295 ParsedType &ObjectType, 3296 bool &MayBePseudoDestructor); 3297 3298 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3299 3300 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3301 SourceLocation OpLoc, 3302 tok::TokenKind OpKind, 3303 const CXXScopeSpec &SS, 3304 TypeSourceInfo *ScopeType, 3305 SourceLocation CCLoc, 3306 SourceLocation TildeLoc, 3307 PseudoDestructorTypeStorage DestroyedType, 3308 bool HasTrailingLParen); 3309 3310 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3311 SourceLocation OpLoc, 3312 tok::TokenKind OpKind, 3313 CXXScopeSpec &SS, 3314 UnqualifiedId &FirstTypeName, 3315 SourceLocation CCLoc, 3316 SourceLocation TildeLoc, 3317 UnqualifiedId &SecondTypeName, 3318 bool HasTrailingLParen); 3319 3320 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3321 SourceLocation OpLoc, 3322 tok::TokenKind OpKind, 3323 SourceLocation TildeLoc, 3324 const DeclSpec& DS, 3325 bool HasTrailingLParen); 3326 3327 /// MaybeCreateExprWithCleanups - If the current full-expression 3328 /// requires any cleanups, surround it with a ExprWithCleanups node. 3329 /// Otherwise, just returns the passed-in expression. 3330 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3331 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3332 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3333 3334 ExprResult ActOnFinishFullExpr(Expr *Expr); 3335 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3336 3337 // Marks SS invalid if it represents an incomplete type. 3338 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3339 3340 DeclContext *computeDeclContext(QualType T); 3341 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3342 bool EnteringContext = false); 3343 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3344 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3345 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3346 3347 /// \brief The parser has parsed a global nested-name-specifier '::'. 3348 /// 3349 /// \param S The scope in which this nested-name-specifier occurs. 3350 /// 3351 /// \param CCLoc The location of the '::'. 3352 /// 3353 /// \param SS The nested-name-specifier, which will be updated in-place 3354 /// to reflect the parsed nested-name-specifier. 3355 /// 3356 /// \returns true if an error occurred, false otherwise. 3357 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3358 CXXScopeSpec &SS); 3359 3360 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3361 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3362 3363 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3364 SourceLocation IdLoc, 3365 IdentifierInfo &II, 3366 ParsedType ObjectType); 3367 3368 bool BuildCXXNestedNameSpecifier(Scope *S, 3369 IdentifierInfo &Identifier, 3370 SourceLocation IdentifierLoc, 3371 SourceLocation CCLoc, 3372 QualType ObjectType, 3373 bool EnteringContext, 3374 CXXScopeSpec &SS, 3375 NamedDecl *ScopeLookupResult, 3376 bool ErrorRecoveryLookup); 3377 3378 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3379 /// 3380 /// \param S The scope in which this nested-name-specifier occurs. 3381 /// 3382 /// \param Identifier The identifier preceding the '::'. 3383 /// 3384 /// \param IdentifierLoc The location of the identifier. 3385 /// 3386 /// \param CCLoc The location of the '::'. 3387 /// 3388 /// \param ObjectType The type of the object, if we're parsing 3389 /// nested-name-specifier in a member access expression. 3390 /// 3391 /// \param EnteringContext Whether we're entering the context nominated by 3392 /// this nested-name-specifier. 3393 /// 3394 /// \param SS The nested-name-specifier, which is both an input 3395 /// parameter (the nested-name-specifier before this type) and an 3396 /// output parameter (containing the full nested-name-specifier, 3397 /// including this new type). 3398 /// 3399 /// \returns true if an error occurred, false otherwise. 3400 bool ActOnCXXNestedNameSpecifier(Scope *S, 3401 IdentifierInfo &Identifier, 3402 SourceLocation IdentifierLoc, 3403 SourceLocation CCLoc, 3404 ParsedType ObjectType, 3405 bool EnteringContext, 3406 CXXScopeSpec &SS); 3407 3408 bool ActOnCXXNestedNameSpecifierDecltype(CXXScopeSpec &SS, 3409 const DeclSpec &DS, 3410 SourceLocation ColonColonLoc); 3411 3412 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3413 IdentifierInfo &Identifier, 3414 SourceLocation IdentifierLoc, 3415 SourceLocation ColonLoc, 3416 ParsedType ObjectType, 3417 bool EnteringContext); 3418 3419 /// \brief The parser has parsed a nested-name-specifier 3420 /// 'template[opt] template-name < template-args >::'. 3421 /// 3422 /// \param S The scope in which this nested-name-specifier occurs. 3423 /// 3424 /// \param SS The nested-name-specifier, which is both an input 3425 /// parameter (the nested-name-specifier before this type) and an 3426 /// output parameter (containing the full nested-name-specifier, 3427 /// including this new type). 3428 /// 3429 /// \param TemplateKWLoc the location of the 'template' keyword, if any. 3430 /// \param TemplateName The template name. 3431 /// \param TemplateNameLoc The location of the template name. 3432 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3433 /// \param TemplateArgs The template arguments. 3434 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3435 /// \param CCLoc The location of the '::'. 3436 /// 3437 /// \param EnteringContext Whether we're entering the context of the 3438 /// nested-name-specifier. 3439 /// 3440 /// 3441 /// \returns true if an error occurred, false otherwise. 3442 bool ActOnCXXNestedNameSpecifier(Scope *S, 3443 CXXScopeSpec &SS, 3444 SourceLocation TemplateKWLoc, 3445 TemplateTy Template, 3446 SourceLocation TemplateNameLoc, 3447 SourceLocation LAngleLoc, 3448 ASTTemplateArgsPtr TemplateArgs, 3449 SourceLocation RAngleLoc, 3450 SourceLocation CCLoc, 3451 bool EnteringContext); 3452 3453 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3454 /// that the parser can use later to reconstruct the given 3455 /// nested-name-specifier. 3456 /// 3457 /// \param SS A nested-name-specifier. 3458 /// 3459 /// \returns A pointer containing all of the information in the 3460 /// nested-name-specifier \p SS. 3461 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3462 3463 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3464 /// the nested-name-specifier structure. 3465 /// 3466 /// \param Annotation The annotation pointer, produced by 3467 /// \c SaveNestedNameSpecifierAnnotation(). 3468 /// 3469 /// \param AnnotationRange The source range corresponding to the annotation. 3470 /// 3471 /// \param SS The nested-name-specifier that will be updated with the contents 3472 /// of the annotation pointer. 3473 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3474 SourceRange AnnotationRange, 3475 CXXScopeSpec &SS); 3476 3477 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3478 3479 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3480 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3481 /// After this method is called, according to [C++ 3.4.3p3], names should be 3482 /// looked up in the declarator-id's scope, until the declarator is parsed and 3483 /// ActOnCXXExitDeclaratorScope is called. 3484 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3485 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3486 3487 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3488 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3489 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3490 /// Used to indicate that names should revert to being looked up in the 3491 /// defining scope. 3492 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3493 3494 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3495 /// initializer for the declaration 'Dcl'. 3496 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3497 /// static data member of class X, names should be looked up in the scope of 3498 /// class X. 3499 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3500 3501 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3502 /// initializer for the declaration 'Dcl'. 3503 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3504 3505 /// \brief Create a new lambda closure type. 3506 CXXRecordDecl *createLambdaClosureType(SourceRange IntroducerRange); 3507 3508 /// \brief Start the definition of a lambda expression. 3509 CXXMethodDecl *startLambdaDefinition(CXXRecordDecl *Class, 3510 SourceRange IntroducerRange, 3511 TypeSourceInfo *MethodType, 3512 SourceLocation EndLoc, 3513 llvm::ArrayRef<ParmVarDecl *> Params); 3514 3515 /// \brief Introduce the scope for a lambda expression. 3516 sema::LambdaScopeInfo *enterLambdaScope(CXXMethodDecl *CallOperator, 3517 SourceRange IntroducerRange, 3518 LambdaCaptureDefault CaptureDefault, 3519 bool ExplicitParams, 3520 bool ExplicitResultType, 3521 bool Mutable); 3522 3523 /// \brief Note that we have finished the explicit captures for the 3524 /// given lambda. 3525 void finishLambdaExplicitCaptures(sema::LambdaScopeInfo *LSI); 3526 3527 /// \brief Introduce the lambda parameters into scope. 3528 void addLambdaParameters(CXXMethodDecl *CallOperator, Scope *CurScope); 3529 3530 /// ActOnStartOfLambdaDefinition - This is called just before we start 3531 /// parsing the body of a lambda; it analyzes the explicit captures and 3532 /// arguments, and sets up various data-structures for the body of the 3533 /// lambda. 3534 void ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro, 3535 Declarator &ParamInfo, Scope *CurScope); 3536 3537 /// ActOnLambdaError - If there is an error parsing a lambda, this callback 3538 /// is invoked to pop the information about the lambda. 3539 void ActOnLambdaError(SourceLocation StartLoc, Scope *CurScope, 3540 bool IsInstantiation = false); 3541 3542 /// ActOnLambdaExpr - This is called when the body of a lambda expression 3543 /// was successfully completed. 3544 ExprResult ActOnLambdaExpr(SourceLocation StartLoc, Stmt *Body, 3545 Scope *CurScope, bool IsInstantiation = false); 3546 3547 /// \brief Define the "body" of the conversion from a lambda object to a 3548 /// function pointer. 3549 /// 3550 /// This routine doesn't actually define a sensible body; rather, it fills 3551 /// in the initialization expression needed to copy the lambda object into 3552 /// the block, and IR generation actually generates the real body of the 3553 /// block pointer conversion. 3554 void DefineImplicitLambdaToFunctionPointerConversion( 3555 SourceLocation CurrentLoc, CXXConversionDecl *Conv); 3556 3557 /// \brief Define the "body" of the conversion from a lambda object to a 3558 /// block 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 DefineImplicitLambdaToBlockPointerConversion(SourceLocation CurrentLoc, 3565 CXXConversionDecl *Conv); 3566 3567 // ParseObjCStringLiteral - Parse Objective-C string literals. 3568 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3569 Expr **Strings, 3570 unsigned NumStrings); 3571 3572 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3573 TypeSourceInfo *EncodedTypeInfo, 3574 SourceLocation RParenLoc); 3575 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3576 CXXMethodDecl *Method, 3577 bool HadMultipleCandidates); 3578 3579 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3580 SourceLocation EncodeLoc, 3581 SourceLocation LParenLoc, 3582 ParsedType Ty, 3583 SourceLocation RParenLoc); 3584 3585 // ParseObjCSelectorExpression - Build selector expression for @selector 3586 ExprResult ParseObjCSelectorExpression(Selector Sel, 3587 SourceLocation AtLoc, 3588 SourceLocation SelLoc, 3589 SourceLocation LParenLoc, 3590 SourceLocation RParenLoc); 3591 3592 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3593 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3594 SourceLocation AtLoc, 3595 SourceLocation ProtoLoc, 3596 SourceLocation LParenLoc, 3597 SourceLocation RParenLoc); 3598 3599 //===--------------------------------------------------------------------===// 3600 // C++ Declarations 3601 // 3602 Decl *ActOnStartLinkageSpecification(Scope *S, 3603 SourceLocation ExternLoc, 3604 SourceLocation LangLoc, 3605 StringRef Lang, 3606 SourceLocation LBraceLoc); 3607 Decl *ActOnFinishLinkageSpecification(Scope *S, 3608 Decl *LinkageSpec, 3609 SourceLocation RBraceLoc); 3610 3611 3612 //===--------------------------------------------------------------------===// 3613 // C++ Classes 3614 // 3615 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3616 const CXXScopeSpec *SS = 0); 3617 3618 bool ActOnAccessSpecifier(AccessSpecifier Access, 3619 SourceLocation ASLoc, 3620 SourceLocation ColonLoc, 3621 AttributeList *Attrs = 0); 3622 3623 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3624 Declarator &D, 3625 MultiTemplateParamsArg TemplateParameterLists, 3626 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3627 bool HasDeferredInit); 3628 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3629 Expr *Init); 3630 3631 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3632 Scope *S, 3633 CXXScopeSpec &SS, 3634 IdentifierInfo *MemberOrBase, 3635 ParsedType TemplateTypeTy, 3636 const DeclSpec &DS, 3637 SourceLocation IdLoc, 3638 SourceLocation LParenLoc, 3639 Expr **Args, unsigned NumArgs, 3640 SourceLocation RParenLoc, 3641 SourceLocation EllipsisLoc); 3642 3643 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3644 Scope *S, 3645 CXXScopeSpec &SS, 3646 IdentifierInfo *MemberOrBase, 3647 ParsedType TemplateTypeTy, 3648 const DeclSpec &DS, 3649 SourceLocation IdLoc, 3650 Expr *InitList, 3651 SourceLocation EllipsisLoc); 3652 3653 MemInitResult BuildMemInitializer(Decl *ConstructorD, 3654 Scope *S, 3655 CXXScopeSpec &SS, 3656 IdentifierInfo *MemberOrBase, 3657 ParsedType TemplateTypeTy, 3658 const DeclSpec &DS, 3659 SourceLocation IdLoc, 3660 Expr *Init, 3661 SourceLocation EllipsisLoc); 3662 3663 MemInitResult BuildMemberInitializer(ValueDecl *Member, 3664 Expr *Init, 3665 SourceLocation IdLoc); 3666 3667 MemInitResult BuildBaseInitializer(QualType BaseType, 3668 TypeSourceInfo *BaseTInfo, 3669 Expr *Init, 3670 CXXRecordDecl *ClassDecl, 3671 SourceLocation EllipsisLoc); 3672 3673 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3674 Expr *Init, 3675 CXXRecordDecl *ClassDecl); 3676 3677 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3678 CXXCtorInitializer *Initializer); 3679 3680 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3681 CXXCtorInitializer **Initializers, 3682 unsigned NumInitializers, bool AnyErrors); 3683 3684 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3685 3686 3687 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3688 /// mark all the non-trivial destructors of its members and bases as 3689 /// referenced. 3690 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3691 CXXRecordDecl *Record); 3692 3693 /// \brief The list of classes whose vtables have been used within 3694 /// this translation unit, and the source locations at which the 3695 /// first use occurred. 3696 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3697 3698 /// \brief The list of vtables that are required but have not yet been 3699 /// materialized. 3700 SmallVector<VTableUse, 16> VTableUses; 3701 3702 /// \brief The set of classes whose vtables have been used within 3703 /// this translation unit, and a bit that will be true if the vtable is 3704 /// required to be emitted (otherwise, it should be emitted only if needed 3705 /// by code generation). 3706 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3707 3708 /// \brief Load any externally-stored vtable uses. 3709 void LoadExternalVTableUses(); 3710 3711 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 3712 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 3713 DynamicClassesType; 3714 3715 /// \brief A list of all of the dynamic classes in this translation 3716 /// unit. 3717 DynamicClassesType DynamicClasses; 3718 3719 /// \brief Note that the vtable for the given class was used at the 3720 /// given location. 3721 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3722 bool DefinitionRequired = false); 3723 3724 /// MarkVirtualMembersReferenced - Will mark all members of the given 3725 /// CXXRecordDecl referenced. 3726 void MarkVirtualMembersReferenced(SourceLocation Loc, 3727 const CXXRecordDecl *RD); 3728 3729 /// \brief Define all of the vtables that have been used in this 3730 /// translation unit and reference any virtual members used by those 3731 /// vtables. 3732 /// 3733 /// \returns true if any work was done, false otherwise. 3734 bool DefineUsedVTables(); 3735 3736 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3737 3738 void ActOnMemInitializers(Decl *ConstructorDecl, 3739 SourceLocation ColonLoc, 3740 CXXCtorInitializer **MemInits, 3741 unsigned NumMemInits, 3742 bool AnyErrors); 3743 3744 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3745 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3746 Decl *TagDecl, 3747 SourceLocation LBrac, 3748 SourceLocation RBrac, 3749 AttributeList *AttrList); 3750 3751 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3752 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3753 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3754 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3755 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3756 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3757 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3758 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3759 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3760 bool IsInsideALocalClassWithinATemplateFunction(); 3761 3762 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3763 Expr *AssertExpr, 3764 Expr *AssertMessageExpr, 3765 SourceLocation RParenLoc); 3766 3767 FriendDecl *CheckFriendTypeDecl(SourceLocation Loc, 3768 SourceLocation FriendLoc, 3769 TypeSourceInfo *TSInfo); 3770 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3771 MultiTemplateParamsArg TemplateParams); 3772 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, 3773 MultiTemplateParamsArg TemplateParams); 3774 3775 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3776 StorageClass& SC); 3777 void CheckConstructor(CXXConstructorDecl *Constructor); 3778 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3779 StorageClass& SC); 3780 bool CheckDestructor(CXXDestructorDecl *Destructor); 3781 void CheckConversionDeclarator(Declarator &D, QualType &R, 3782 StorageClass& SC); 3783 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3784 3785 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3786 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3787 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3788 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3789 void CheckExplicitlyDefaultedMoveConstructor(CXXConstructorDecl *Ctor); 3790 void CheckExplicitlyDefaultedMoveAssignment(CXXMethodDecl *Method); 3791 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3792 3793 //===--------------------------------------------------------------------===// 3794 // C++ Derived Classes 3795 // 3796 3797 /// ActOnBaseSpecifier - Parsed a base specifier 3798 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3799 SourceRange SpecifierRange, 3800 bool Virtual, AccessSpecifier Access, 3801 TypeSourceInfo *TInfo, 3802 SourceLocation EllipsisLoc); 3803 3804 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3805 SourceRange SpecifierRange, 3806 bool Virtual, AccessSpecifier Access, 3807 ParsedType basetype, 3808 SourceLocation BaseLoc, 3809 SourceLocation EllipsisLoc); 3810 3811 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3812 unsigned NumBases); 3813 void ActOnBaseSpecifiers(Decl *ClassDecl, CXXBaseSpecifier **Bases, 3814 unsigned NumBases); 3815 3816 bool IsDerivedFrom(QualType Derived, QualType Base); 3817 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3818 3819 // FIXME: I don't like this name. 3820 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3821 3822 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3823 3824 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3825 SourceLocation Loc, SourceRange Range, 3826 CXXCastPath *BasePath = 0, 3827 bool IgnoreAccess = false); 3828 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3829 unsigned InaccessibleBaseID, 3830 unsigned AmbigiousBaseConvID, 3831 SourceLocation Loc, SourceRange Range, 3832 DeclarationName Name, 3833 CXXCastPath *BasePath); 3834 3835 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3836 3837 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3838 /// covariant, according to C++ [class.virtual]p5. 3839 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3840 const CXXMethodDecl *Old); 3841 3842 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3843 /// spec is a subset of base spec. 3844 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3845 const CXXMethodDecl *Old); 3846 3847 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3848 3849 /// CheckOverrideControl - Check C++0x override control semantics. 3850 void CheckOverrideControl(const Decl *D); 3851 3852 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3853 /// overrides a virtual member function marked 'final', according to 3854 /// C++0x [class.virtual]p3. 3855 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3856 const CXXMethodDecl *Old); 3857 3858 3859 //===--------------------------------------------------------------------===// 3860 // C++ Access Control 3861 // 3862 3863 enum AccessResult { 3864 AR_accessible, 3865 AR_inaccessible, 3866 AR_dependent, 3867 AR_delayed 3868 }; 3869 3870 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3871 NamedDecl *PrevMemberDecl, 3872 AccessSpecifier LexicalAS); 3873 3874 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3875 DeclAccessPair FoundDecl); 3876 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3877 DeclAccessPair FoundDecl); 3878 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3879 SourceRange PlacementRange, 3880 CXXRecordDecl *NamingClass, 3881 DeclAccessPair FoundDecl, 3882 bool Diagnose = true); 3883 AccessResult CheckConstructorAccess(SourceLocation Loc, 3884 CXXConstructorDecl *D, 3885 const InitializedEntity &Entity, 3886 AccessSpecifier Access, 3887 bool IsCopyBindingRefToTemp = false); 3888 AccessResult CheckConstructorAccess(SourceLocation Loc, 3889 CXXConstructorDecl *D, 3890 AccessSpecifier Access, 3891 PartialDiagnostic PD); 3892 AccessResult CheckDestructorAccess(SourceLocation Loc, 3893 CXXDestructorDecl *Dtor, 3894 const PartialDiagnostic &PDiag); 3895 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3896 NamedDecl *D, 3897 const PartialDiagnostic &PDiag); 3898 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3899 Expr *ObjectExpr, 3900 Expr *ArgExpr, 3901 DeclAccessPair FoundDecl); 3902 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3903 DeclAccessPair FoundDecl); 3904 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3905 QualType Base, QualType Derived, 3906 const CXXBasePath &Path, 3907 unsigned DiagID, 3908 bool ForceCheck = false, 3909 bool ForceUnprivileged = false); 3910 void CheckLookupAccess(const LookupResult &R); 3911 bool IsSimplyAccessible(NamedDecl *decl, DeclContext *Ctx); 3912 3913 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3914 const MultiLevelTemplateArgumentList &TemplateArgs); 3915 void PerformDependentDiagnostics(const DeclContext *Pattern, 3916 const MultiLevelTemplateArgumentList &TemplateArgs); 3917 3918 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3919 3920 /// A flag to suppress access checking. 3921 bool SuppressAccessChecking; 3922 3923 /// \brief When true, access checking violations are treated as SFINAE 3924 /// failures rather than hard errors. 3925 bool AccessCheckingSFINAE; 3926 3927 void ActOnStartSuppressingAccessChecks(); 3928 void ActOnStopSuppressingAccessChecks(); 3929 3930 enum AbstractDiagSelID { 3931 AbstractNone = -1, 3932 AbstractReturnType, 3933 AbstractParamType, 3934 AbstractVariableType, 3935 AbstractFieldType, 3936 AbstractArrayType 3937 }; 3938 3939 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3940 const PartialDiagnostic &PD); 3941 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3942 3943 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3944 AbstractDiagSelID SelID = AbstractNone); 3945 3946 //===--------------------------------------------------------------------===// 3947 // C++ Overloaded Operators [C++ 13.5] 3948 // 3949 3950 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3951 3952 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3953 3954 //===--------------------------------------------------------------------===// 3955 // C++ Templates [C++ 14] 3956 // 3957 void FilterAcceptableTemplateNames(LookupResult &R); 3958 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3959 3960 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3961 QualType ObjectType, bool EnteringContext, 3962 bool &MemberOfUnknownSpecialization); 3963 3964 TemplateNameKind isTemplateName(Scope *S, 3965 CXXScopeSpec &SS, 3966 bool hasTemplateKeyword, 3967 UnqualifiedId &Name, 3968 ParsedType ObjectType, 3969 bool EnteringContext, 3970 TemplateTy &Template, 3971 bool &MemberOfUnknownSpecialization); 3972 3973 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3974 SourceLocation IILoc, 3975 Scope *S, 3976 const CXXScopeSpec *SS, 3977 TemplateTy &SuggestedTemplate, 3978 TemplateNameKind &SuggestedKind); 3979 3980 void DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3981 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3982 3983 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3984 SourceLocation EllipsisLoc, 3985 SourceLocation KeyLoc, 3986 IdentifierInfo *ParamName, 3987 SourceLocation ParamNameLoc, 3988 unsigned Depth, unsigned Position, 3989 SourceLocation EqualLoc, 3990 ParsedType DefaultArg); 3991 3992 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3993 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3994 unsigned Depth, 3995 unsigned Position, 3996 SourceLocation EqualLoc, 3997 Expr *DefaultArg); 3998 Decl *ActOnTemplateTemplateParameter(Scope *S, 3999 SourceLocation TmpLoc, 4000 TemplateParameterList *Params, 4001 SourceLocation EllipsisLoc, 4002 IdentifierInfo *ParamName, 4003 SourceLocation ParamNameLoc, 4004 unsigned Depth, 4005 unsigned Position, 4006 SourceLocation EqualLoc, 4007 ParsedTemplateArgument DefaultArg); 4008 4009 TemplateParameterList * 4010 ActOnTemplateParameterList(unsigned Depth, 4011 SourceLocation ExportLoc, 4012 SourceLocation TemplateLoc, 4013 SourceLocation LAngleLoc, 4014 Decl **Params, unsigned NumParams, 4015 SourceLocation RAngleLoc); 4016 4017 /// \brief The context in which we are checking a template parameter 4018 /// list. 4019 enum TemplateParamListContext { 4020 TPC_ClassTemplate, 4021 TPC_FunctionTemplate, 4022 TPC_ClassTemplateMember, 4023 TPC_FriendFunctionTemplate, 4024 TPC_FriendFunctionTemplateDefinition, 4025 TPC_TypeAliasTemplate 4026 }; 4027 4028 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 4029 TemplateParameterList *OldParams, 4030 TemplateParamListContext TPC); 4031 TemplateParameterList * 4032 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 4033 SourceLocation DeclLoc, 4034 const CXXScopeSpec &SS, 4035 TemplateParameterList **ParamLists, 4036 unsigned NumParamLists, 4037 bool IsFriend, 4038 bool &IsExplicitSpecialization, 4039 bool &Invalid); 4040 4041 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 4042 SourceLocation KWLoc, CXXScopeSpec &SS, 4043 IdentifierInfo *Name, SourceLocation NameLoc, 4044 AttributeList *Attr, 4045 TemplateParameterList *TemplateParams, 4046 AccessSpecifier AS, 4047 SourceLocation ModulePrivateLoc, 4048 unsigned NumOuterTemplateParamLists, 4049 TemplateParameterList **OuterTemplateParamLists); 4050 4051 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 4052 TemplateArgumentListInfo &Out); 4053 4054 void NoteAllFoundTemplates(TemplateName Name); 4055 4056 QualType CheckTemplateIdType(TemplateName Template, 4057 SourceLocation TemplateLoc, 4058 TemplateArgumentListInfo &TemplateArgs); 4059 4060 TypeResult 4061 ActOnTemplateIdType(CXXScopeSpec &SS, SourceLocation TemplateKWLoc, 4062 TemplateTy Template, SourceLocation TemplateLoc, 4063 SourceLocation LAngleLoc, 4064 ASTTemplateArgsPtr TemplateArgs, 4065 SourceLocation RAngleLoc, 4066 bool IsCtorOrDtorName = false); 4067 4068 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 4069 /// such as \c class T::template apply<U>. 4070 /// 4071 /// \param TUK 4072 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 4073 TypeSpecifierType TagSpec, 4074 SourceLocation TagLoc, 4075 CXXScopeSpec &SS, 4076 SourceLocation TemplateKWLoc, 4077 TemplateTy TemplateD, 4078 SourceLocation TemplateLoc, 4079 SourceLocation LAngleLoc, 4080 ASTTemplateArgsPtr TemplateArgsIn, 4081 SourceLocation RAngleLoc); 4082 4083 4084 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 4085 SourceLocation TemplateKWLoc, 4086 LookupResult &R, 4087 bool RequiresADL, 4088 const TemplateArgumentListInfo *TemplateArgs); 4089 4090 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 4091 SourceLocation TemplateKWLoc, 4092 const DeclarationNameInfo &NameInfo, 4093 const TemplateArgumentListInfo *TemplateArgs); 4094 4095 TemplateNameKind ActOnDependentTemplateName(Scope *S, 4096 CXXScopeSpec &SS, 4097 SourceLocation TemplateKWLoc, 4098 UnqualifiedId &Name, 4099 ParsedType ObjectType, 4100 bool EnteringContext, 4101 TemplateTy &Template); 4102 4103 DeclResult 4104 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 4105 SourceLocation KWLoc, 4106 SourceLocation ModulePrivateLoc, 4107 CXXScopeSpec &SS, 4108 TemplateTy Template, 4109 SourceLocation TemplateNameLoc, 4110 SourceLocation LAngleLoc, 4111 ASTTemplateArgsPtr TemplateArgs, 4112 SourceLocation RAngleLoc, 4113 AttributeList *Attr, 4114 MultiTemplateParamsArg TemplateParameterLists); 4115 4116 Decl *ActOnTemplateDeclarator(Scope *S, 4117 MultiTemplateParamsArg TemplateParameterLists, 4118 Declarator &D); 4119 4120 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 4121 MultiTemplateParamsArg TemplateParameterLists, 4122 Declarator &D); 4123 4124 bool 4125 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 4126 TemplateSpecializationKind NewTSK, 4127 NamedDecl *PrevDecl, 4128 TemplateSpecializationKind PrevTSK, 4129 SourceLocation PrevPtOfInstantiation, 4130 bool &SuppressNew); 4131 4132 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 4133 const TemplateArgumentListInfo &ExplicitTemplateArgs, 4134 LookupResult &Previous); 4135 4136 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 4137 TemplateArgumentListInfo *ExplicitTemplateArgs, 4138 LookupResult &Previous); 4139 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 4140 4141 DeclResult 4142 ActOnExplicitInstantiation(Scope *S, 4143 SourceLocation ExternLoc, 4144 SourceLocation TemplateLoc, 4145 unsigned TagSpec, 4146 SourceLocation KWLoc, 4147 const CXXScopeSpec &SS, 4148 TemplateTy Template, 4149 SourceLocation TemplateNameLoc, 4150 SourceLocation LAngleLoc, 4151 ASTTemplateArgsPtr TemplateArgs, 4152 SourceLocation RAngleLoc, 4153 AttributeList *Attr); 4154 4155 DeclResult 4156 ActOnExplicitInstantiation(Scope *S, 4157 SourceLocation ExternLoc, 4158 SourceLocation TemplateLoc, 4159 unsigned TagSpec, 4160 SourceLocation KWLoc, 4161 CXXScopeSpec &SS, 4162 IdentifierInfo *Name, 4163 SourceLocation NameLoc, 4164 AttributeList *Attr); 4165 4166 DeclResult ActOnExplicitInstantiation(Scope *S, 4167 SourceLocation ExternLoc, 4168 SourceLocation TemplateLoc, 4169 Declarator &D); 4170 4171 TemplateArgumentLoc 4172 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 4173 SourceLocation TemplateLoc, 4174 SourceLocation RAngleLoc, 4175 Decl *Param, 4176 SmallVectorImpl<TemplateArgument> &Converted); 4177 4178 /// \brief Specifies the context in which a particular template 4179 /// argument is being checked. 4180 enum CheckTemplateArgumentKind { 4181 /// \brief The template argument was specified in the code or was 4182 /// instantiated with some deduced template arguments. 4183 CTAK_Specified, 4184 4185 /// \brief The template argument was deduced via template argument 4186 /// deduction. 4187 CTAK_Deduced, 4188 4189 /// \brief The template argument was deduced from an array bound 4190 /// via template argument deduction. 4191 CTAK_DeducedFromArrayBound 4192 }; 4193 4194 bool CheckTemplateArgument(NamedDecl *Param, 4195 const TemplateArgumentLoc &Arg, 4196 NamedDecl *Template, 4197 SourceLocation TemplateLoc, 4198 SourceLocation RAngleLoc, 4199 unsigned ArgumentPackIndex, 4200 SmallVectorImpl<TemplateArgument> &Converted, 4201 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4202 4203 /// \brief Check that the given template arguments can be be provided to 4204 /// the given template, converting the arguments along the way. 4205 /// 4206 /// \param Template The template to which the template arguments are being 4207 /// provided. 4208 /// 4209 /// \param TemplateLoc The location of the template name in the source. 4210 /// 4211 /// \param TemplateArgs The list of template arguments. If the template is 4212 /// a template template parameter, this function may extend the set of 4213 /// template arguments to also include substituted, defaulted template 4214 /// arguments. 4215 /// 4216 /// \param PartialTemplateArgs True if the list of template arguments is 4217 /// intentionally partial, e.g., because we're checking just the initial 4218 /// set of template arguments. 4219 /// 4220 /// \param Converted Will receive the converted, canonicalized template 4221 /// arguments. 4222 /// 4223 /// 4224 /// \param ExpansionIntoFixedList If non-NULL, will be set true to indicate 4225 /// when the template arguments contain a pack expansion that is being 4226 /// expanded into a fixed parameter list. 4227 /// 4228 /// \returns True if an error occurred, false otherwise. 4229 bool CheckTemplateArgumentList(TemplateDecl *Template, 4230 SourceLocation TemplateLoc, 4231 TemplateArgumentListInfo &TemplateArgs, 4232 bool PartialTemplateArgs, 4233 SmallVectorImpl<TemplateArgument> &Converted, 4234 bool *ExpansionIntoFixedList = 0); 4235 4236 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 4237 const TemplateArgumentLoc &Arg, 4238 SmallVectorImpl<TemplateArgument> &Converted); 4239 4240 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 4241 TypeSourceInfo *Arg); 4242 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 4243 TemplateArgument &Converted); 4244 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 4245 QualType InstantiatedParamType, Expr *Arg, 4246 TemplateArgument &Converted, 4247 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4248 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 4249 const TemplateArgumentLoc &Arg); 4250 4251 ExprResult 4252 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 4253 QualType ParamType, 4254 SourceLocation Loc); 4255 ExprResult 4256 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 4257 SourceLocation Loc); 4258 4259 /// \brief Enumeration describing how template parameter lists are compared 4260 /// for equality. 4261 enum TemplateParameterListEqualKind { 4262 /// \brief We are matching the template parameter lists of two templates 4263 /// that might be redeclarations. 4264 /// 4265 /// \code 4266 /// template<typename T> struct X; 4267 /// template<typename T> struct X; 4268 /// \endcode 4269 TPL_TemplateMatch, 4270 4271 /// \brief We are matching the template parameter lists of two template 4272 /// template parameters as part of matching the template parameter lists 4273 /// of two templates that might be redeclarations. 4274 /// 4275 /// \code 4276 /// template<template<int I> class TT> struct X; 4277 /// template<template<int Value> class Other> struct X; 4278 /// \endcode 4279 TPL_TemplateTemplateParmMatch, 4280 4281 /// \brief We are matching the template parameter lists of a template 4282 /// template argument against the template parameter lists of a template 4283 /// template parameter. 4284 /// 4285 /// \code 4286 /// template<template<int Value> class Metafun> struct X; 4287 /// template<int Value> struct integer_c; 4288 /// X<integer_c> xic; 4289 /// \endcode 4290 TPL_TemplateTemplateArgumentMatch 4291 }; 4292 4293 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 4294 TemplateParameterList *Old, 4295 bool Complain, 4296 TemplateParameterListEqualKind Kind, 4297 SourceLocation TemplateArgLoc 4298 = SourceLocation()); 4299 4300 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 4301 4302 /// \brief Called when the parser has parsed a C++ typename 4303 /// specifier, e.g., "typename T::type". 4304 /// 4305 /// \param S The scope in which this typename type occurs. 4306 /// \param TypenameLoc the location of the 'typename' keyword 4307 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4308 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 4309 /// \param IdLoc the location of the identifier. 4310 TypeResult 4311 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4312 const CXXScopeSpec &SS, const IdentifierInfo &II, 4313 SourceLocation IdLoc); 4314 4315 /// \brief Called when the parser has parsed a C++ typename 4316 /// specifier that ends in a template-id, e.g., 4317 /// "typename MetaFun::template apply<T1, T2>". 4318 /// 4319 /// \param S The scope in which this typename type occurs. 4320 /// \param TypenameLoc the location of the 'typename' keyword 4321 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4322 /// \param TemplateLoc the location of the 'template' keyword, if any. 4323 /// \param TemplateName The template name. 4324 /// \param TemplateNameLoc The location of the template name. 4325 /// \param LAngleLoc The location of the opening angle bracket ('<'). 4326 /// \param TemplateArgs The template arguments. 4327 /// \param RAngleLoc The location of the closing angle bracket ('>'). 4328 TypeResult 4329 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4330 const CXXScopeSpec &SS, 4331 SourceLocation TemplateLoc, 4332 TemplateTy Template, 4333 SourceLocation TemplateNameLoc, 4334 SourceLocation LAngleLoc, 4335 ASTTemplateArgsPtr TemplateArgs, 4336 SourceLocation RAngleLoc); 4337 4338 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 4339 SourceLocation KeywordLoc, 4340 NestedNameSpecifierLoc QualifierLoc, 4341 const IdentifierInfo &II, 4342 SourceLocation IILoc); 4343 4344 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 4345 SourceLocation Loc, 4346 DeclarationName Name); 4347 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 4348 4349 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 4350 bool RebuildTemplateParamsInCurrentInstantiation( 4351 TemplateParameterList *Params); 4352 4353 std::string 4354 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4355 const TemplateArgumentList &Args); 4356 4357 std::string 4358 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4359 const TemplateArgument *Args, 4360 unsigned NumArgs); 4361 4362 //===--------------------------------------------------------------------===// 4363 // C++ Variadic Templates (C++0x [temp.variadic]) 4364 //===--------------------------------------------------------------------===// 4365 4366 /// \brief The context in which an unexpanded parameter pack is 4367 /// being diagnosed. 4368 /// 4369 /// Note that the values of this enumeration line up with the first 4370 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4371 enum UnexpandedParameterPackContext { 4372 /// \brief An arbitrary expression. 4373 UPPC_Expression = 0, 4374 4375 /// \brief The base type of a class type. 4376 UPPC_BaseType, 4377 4378 /// \brief The type of an arbitrary declaration. 4379 UPPC_DeclarationType, 4380 4381 /// \brief The type of a data member. 4382 UPPC_DataMemberType, 4383 4384 /// \brief The size of a bit-field. 4385 UPPC_BitFieldWidth, 4386 4387 /// \brief The expression in a static assertion. 4388 UPPC_StaticAssertExpression, 4389 4390 /// \brief The fixed underlying type of an enumeration. 4391 UPPC_FixedUnderlyingType, 4392 4393 /// \brief The enumerator value. 4394 UPPC_EnumeratorValue, 4395 4396 /// \brief A using declaration. 4397 UPPC_UsingDeclaration, 4398 4399 /// \brief A friend declaration. 4400 UPPC_FriendDeclaration, 4401 4402 /// \brief A declaration qualifier. 4403 UPPC_DeclarationQualifier, 4404 4405 /// \brief An initializer. 4406 UPPC_Initializer, 4407 4408 /// \brief A default argument. 4409 UPPC_DefaultArgument, 4410 4411 /// \brief The type of a non-type template parameter. 4412 UPPC_NonTypeTemplateParameterType, 4413 4414 /// \brief The type of an exception. 4415 UPPC_ExceptionType, 4416 4417 /// \brief Partial specialization. 4418 UPPC_PartialSpecialization, 4419 4420 /// \brief Microsoft __if_exists. 4421 UPPC_IfExists, 4422 4423 /// \brief Microsoft __if_not_exists. 4424 UPPC_IfNotExists 4425}; 4426 4427 /// \brief Diagnose unexpanded parameter packs. 4428 /// 4429 /// \param Loc The location at which we should emit the diagnostic. 4430 /// 4431 /// \param UPPC The context in which we are diagnosing unexpanded 4432 /// parameter packs. 4433 /// 4434 /// \param Unexpanded the set of unexpanded parameter packs. 4435 void DiagnoseUnexpandedParameterPacks(SourceLocation Loc, 4436 UnexpandedParameterPackContext UPPC, 4437 const SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4438 4439 /// \brief If the given type contains an unexpanded parameter pack, 4440 /// diagnose the error. 4441 /// 4442 /// \param Loc The source location where a diagnostc should be emitted. 4443 /// 4444 /// \param T The type that is being checked for unexpanded parameter 4445 /// packs. 4446 /// 4447 /// \returns true if an error occurred, false otherwise. 4448 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4449 UnexpandedParameterPackContext UPPC); 4450 4451 /// \brief If the given expression contains an unexpanded parameter 4452 /// pack, diagnose the error. 4453 /// 4454 /// \param E The expression that is being checked for unexpanded 4455 /// parameter packs. 4456 /// 4457 /// \returns true if an error occurred, false otherwise. 4458 bool DiagnoseUnexpandedParameterPack(Expr *E, 4459 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4460 4461 /// \brief If the given nested-name-specifier contains an unexpanded 4462 /// parameter pack, diagnose the error. 4463 /// 4464 /// \param SS The nested-name-specifier that is being checked for 4465 /// unexpanded parameter packs. 4466 /// 4467 /// \returns true if an error occurred, false otherwise. 4468 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4469 UnexpandedParameterPackContext UPPC); 4470 4471 /// \brief If the given name contains an unexpanded parameter pack, 4472 /// diagnose the error. 4473 /// 4474 /// \param NameInfo The name (with source location information) that 4475 /// is being checked for unexpanded parameter packs. 4476 /// 4477 /// \returns true if an error occurred, false otherwise. 4478 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4479 UnexpandedParameterPackContext UPPC); 4480 4481 /// \brief If the given template name contains an unexpanded parameter pack, 4482 /// diagnose the error. 4483 /// 4484 /// \param Loc The location of the template name. 4485 /// 4486 /// \param Template The template name that is being checked for unexpanded 4487 /// parameter packs. 4488 /// 4489 /// \returns true if an error occurred, false otherwise. 4490 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4491 TemplateName Template, 4492 UnexpandedParameterPackContext UPPC); 4493 4494 /// \brief If the given template argument contains an unexpanded parameter 4495 /// pack, diagnose the error. 4496 /// 4497 /// \param Arg The template argument that is being checked for unexpanded 4498 /// parameter packs. 4499 /// 4500 /// \returns true if an error occurred, false otherwise. 4501 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4502 UnexpandedParameterPackContext UPPC); 4503 4504 /// \brief Collect the set of unexpanded parameter packs within the given 4505 /// template argument. 4506 /// 4507 /// \param Arg The template argument that will be traversed to find 4508 /// unexpanded parameter packs. 4509 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4510 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4511 4512 /// \brief Collect the set of unexpanded parameter packs within the given 4513 /// template argument. 4514 /// 4515 /// \param Arg The template argument that will be traversed to find 4516 /// unexpanded parameter packs. 4517 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4518 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4519 4520 /// \brief Collect the set of unexpanded parameter packs within the given 4521 /// type. 4522 /// 4523 /// \param T The type that will be traversed to find 4524 /// unexpanded parameter packs. 4525 void collectUnexpandedParameterPacks(QualType T, 4526 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4527 4528 /// \brief Collect the set of unexpanded parameter packs within the given 4529 /// type. 4530 /// 4531 /// \param TL The type that will be traversed to find 4532 /// unexpanded parameter packs. 4533 void collectUnexpandedParameterPacks(TypeLoc TL, 4534 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4535 4536 /// \brief Collect the set of unexpanded parameter packs within the given 4537 /// nested-name-specifier. 4538 /// 4539 /// \param SS The nested-name-specifier that will be traversed to find 4540 /// unexpanded parameter packs. 4541 void collectUnexpandedParameterPacks(CXXScopeSpec &SS, 4542 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4543 4544 /// \brief Collect the set of unexpanded parameter packs within the given 4545 /// name. 4546 /// 4547 /// \param NameInfo The name that will be traversed to find 4548 /// unexpanded parameter packs. 4549 void collectUnexpandedParameterPacks(const DeclarationNameInfo &NameInfo, 4550 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4551 4552 /// \brief Invoked when parsing a template argument followed by an 4553 /// ellipsis, which creates a pack expansion. 4554 /// 4555 /// \param Arg The template argument preceding the ellipsis, which 4556 /// may already be invalid. 4557 /// 4558 /// \param EllipsisLoc The location of the ellipsis. 4559 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4560 SourceLocation EllipsisLoc); 4561 4562 /// \brief Invoked when parsing a type followed by an ellipsis, which 4563 /// creates a pack expansion. 4564 /// 4565 /// \param Type The type preceding the ellipsis, which will become 4566 /// the pattern of the pack expansion. 4567 /// 4568 /// \param EllipsisLoc The location of the ellipsis. 4569 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4570 4571 /// \brief Construct a pack expansion type from the pattern of the pack 4572 /// expansion. 4573 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4574 SourceLocation EllipsisLoc, 4575 llvm::Optional<unsigned> NumExpansions); 4576 4577 /// \brief Construct a pack expansion type from the pattern of the pack 4578 /// expansion. 4579 QualType CheckPackExpansion(QualType Pattern, 4580 SourceRange PatternRange, 4581 SourceLocation EllipsisLoc, 4582 llvm::Optional<unsigned> NumExpansions); 4583 4584 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4585 /// creates a pack expansion. 4586 /// 4587 /// \param Pattern The expression preceding the ellipsis, which will become 4588 /// the pattern of the pack expansion. 4589 /// 4590 /// \param EllipsisLoc The location of the ellipsis. 4591 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4592 4593 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4594 /// creates a pack expansion. 4595 /// 4596 /// \param Pattern The expression preceding the ellipsis, which will become 4597 /// the pattern of the pack expansion. 4598 /// 4599 /// \param EllipsisLoc The location of the ellipsis. 4600 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4601 llvm::Optional<unsigned> NumExpansions); 4602 4603 /// \brief Determine whether we could expand a pack expansion with the 4604 /// given set of parameter packs into separate arguments by repeatedly 4605 /// transforming the pattern. 4606 /// 4607 /// \param EllipsisLoc The location of the ellipsis that identifies the 4608 /// pack expansion. 4609 /// 4610 /// \param PatternRange The source range that covers the entire pattern of 4611 /// the pack expansion. 4612 /// 4613 /// \param Unexpanded The set of unexpanded parameter packs within the 4614 /// pattern. 4615 /// 4616 /// \param NumUnexpanded The number of unexpanded parameter packs in 4617 /// \p Unexpanded. 4618 /// 4619 /// \param ShouldExpand Will be set to \c true if the transformer should 4620 /// expand the corresponding pack expansions into separate arguments. When 4621 /// set, \c NumExpansions must also be set. 4622 /// 4623 /// \param RetainExpansion Whether the caller should add an unexpanded 4624 /// pack expansion after all of the expanded arguments. This is used 4625 /// when extending explicitly-specified template argument packs per 4626 /// C++0x [temp.arg.explicit]p9. 4627 /// 4628 /// \param NumExpansions The number of separate arguments that will be in 4629 /// the expanded form of the corresponding pack expansion. This is both an 4630 /// input and an output parameter, which can be set by the caller if the 4631 /// number of expansions is known a priori (e.g., due to a prior substitution) 4632 /// and will be set by the callee when the number of expansions is known. 4633 /// The callee must set this value when \c ShouldExpand is \c true; it may 4634 /// set this value in other cases. 4635 /// 4636 /// \returns true if an error occurred (e.g., because the parameter packs 4637 /// are to be instantiated with arguments of different lengths), false 4638 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4639 /// must be set. 4640 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4641 SourceRange PatternRange, 4642 llvm::ArrayRef<UnexpandedParameterPack> Unexpanded, 4643 const MultiLevelTemplateArgumentList &TemplateArgs, 4644 bool &ShouldExpand, 4645 bool &RetainExpansion, 4646 llvm::Optional<unsigned> &NumExpansions); 4647 4648 /// \brief Determine the number of arguments in the given pack expansion 4649 /// type. 4650 /// 4651 /// This routine already assumes that the pack expansion type can be 4652 /// expanded and that the number of arguments in the expansion is 4653 /// consistent across all of the unexpanded parameter packs in its pattern. 4654 unsigned getNumArgumentsInExpansion(QualType T, 4655 const MultiLevelTemplateArgumentList &TemplateArgs); 4656 4657 /// \brief Determine whether the given declarator contains any unexpanded 4658 /// parameter packs. 4659 /// 4660 /// This routine is used by the parser to disambiguate function declarators 4661 /// with an ellipsis prior to the ')', e.g., 4662 /// 4663 /// \code 4664 /// void f(T...); 4665 /// \endcode 4666 /// 4667 /// To determine whether we have an (unnamed) function parameter pack or 4668 /// a variadic function. 4669 /// 4670 /// \returns true if the declarator contains any unexpanded parameter packs, 4671 /// false otherwise. 4672 bool containsUnexpandedParameterPacks(Declarator &D); 4673 4674 //===--------------------------------------------------------------------===// 4675 // C++ Template Argument Deduction (C++ [temp.deduct]) 4676 //===--------------------------------------------------------------------===// 4677 4678 /// \brief Describes the result of template argument deduction. 4679 /// 4680 /// The TemplateDeductionResult enumeration describes the result of 4681 /// template argument deduction, as returned from 4682 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4683 /// structure provides additional information about the results of 4684 /// template argument deduction, e.g., the deduced template argument 4685 /// list (if successful) or the specific template parameters or 4686 /// deduced arguments that were involved in the failure. 4687 enum TemplateDeductionResult { 4688 /// \brief Template argument deduction was successful. 4689 TDK_Success = 0, 4690 /// \brief Template argument deduction exceeded the maximum template 4691 /// instantiation depth (which has already been diagnosed). 4692 TDK_InstantiationDepth, 4693 /// \brief Template argument deduction did not deduce a value 4694 /// for every template parameter. 4695 TDK_Incomplete, 4696 /// \brief Template argument deduction produced inconsistent 4697 /// deduced values for the given template parameter. 4698 TDK_Inconsistent, 4699 /// \brief Template argument deduction failed due to inconsistent 4700 /// cv-qualifiers on a template parameter type that would 4701 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4702 /// but were given a non-const "X". 4703 TDK_Underqualified, 4704 /// \brief Substitution of the deduced template argument values 4705 /// resulted in an error. 4706 TDK_SubstitutionFailure, 4707 /// \brief Substitution of the deduced template argument values 4708 /// into a non-deduced context produced a type or value that 4709 /// produces a type that does not match the original template 4710 /// arguments provided. 4711 TDK_NonDeducedMismatch, 4712 /// \brief When performing template argument deduction for a function 4713 /// template, there were too many call arguments. 4714 TDK_TooManyArguments, 4715 /// \brief When performing template argument deduction for a function 4716 /// template, there were too few call arguments. 4717 TDK_TooFewArguments, 4718 /// \brief The explicitly-specified template arguments were not valid 4719 /// template arguments for the given template. 4720 TDK_InvalidExplicitArguments, 4721 /// \brief The arguments included an overloaded function name that could 4722 /// not be resolved to a suitable function. 4723 TDK_FailedOverloadResolution 4724 }; 4725 4726 TemplateDeductionResult 4727 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4728 const TemplateArgumentList &TemplateArgs, 4729 sema::TemplateDeductionInfo &Info); 4730 4731 TemplateDeductionResult 4732 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4733 TemplateArgumentListInfo &ExplicitTemplateArgs, 4734 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4735 SmallVectorImpl<QualType> &ParamTypes, 4736 QualType *FunctionType, 4737 sema::TemplateDeductionInfo &Info); 4738 4739 /// brief A function argument from which we performed template argument 4740 // deduction for a call. 4741 struct OriginalCallArg { 4742 OriginalCallArg(QualType OriginalParamType, 4743 unsigned ArgIdx, 4744 QualType OriginalArgType) 4745 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4746 OriginalArgType(OriginalArgType) { } 4747 4748 QualType OriginalParamType; 4749 unsigned ArgIdx; 4750 QualType OriginalArgType; 4751 }; 4752 4753 TemplateDeductionResult 4754 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4755 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4756 unsigned NumExplicitlySpecified, 4757 FunctionDecl *&Specialization, 4758 sema::TemplateDeductionInfo &Info, 4759 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4760 4761 TemplateDeductionResult 4762 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4763 TemplateArgumentListInfo *ExplicitTemplateArgs, 4764 Expr **Args, unsigned NumArgs, 4765 FunctionDecl *&Specialization, 4766 sema::TemplateDeductionInfo &Info); 4767 4768 TemplateDeductionResult 4769 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4770 TemplateArgumentListInfo *ExplicitTemplateArgs, 4771 QualType ArgFunctionType, 4772 FunctionDecl *&Specialization, 4773 sema::TemplateDeductionInfo &Info); 4774 4775 TemplateDeductionResult 4776 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4777 QualType ToType, 4778 CXXConversionDecl *&Specialization, 4779 sema::TemplateDeductionInfo &Info); 4780 4781 TemplateDeductionResult 4782 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4783 TemplateArgumentListInfo *ExplicitTemplateArgs, 4784 FunctionDecl *&Specialization, 4785 sema::TemplateDeductionInfo &Info); 4786 4787 /// \brief Result type of DeduceAutoType. 4788 enum DeduceAutoResult { 4789 DAR_Succeeded, 4790 DAR_Failed, 4791 DAR_FailedAlreadyDiagnosed 4792 }; 4793 4794 DeduceAutoResult DeduceAutoType(TypeSourceInfo *AutoType, Expr *&Initializer, 4795 TypeSourceInfo *&Result); 4796 void DiagnoseAutoDeductionFailure(VarDecl *VDecl, Expr *Init); 4797 4798 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4799 FunctionTemplateDecl *FT2, 4800 SourceLocation Loc, 4801 TemplatePartialOrderingContext TPOC, 4802 unsigned NumCallArguments); 4803 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4804 UnresolvedSetIterator SEnd, 4805 TemplatePartialOrderingContext TPOC, 4806 unsigned NumCallArguments, 4807 SourceLocation Loc, 4808 const PartialDiagnostic &NoneDiag, 4809 const PartialDiagnostic &AmbigDiag, 4810 const PartialDiagnostic &CandidateDiag, 4811 bool Complain = true, 4812 QualType TargetType = QualType()); 4813 4814 ClassTemplatePartialSpecializationDecl * 4815 getMoreSpecializedPartialSpecialization( 4816 ClassTemplatePartialSpecializationDecl *PS1, 4817 ClassTemplatePartialSpecializationDecl *PS2, 4818 SourceLocation Loc); 4819 4820 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4821 bool OnlyDeduced, 4822 unsigned Depth, 4823 llvm::SmallBitVector &Used); 4824 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4825 llvm::SmallBitVector &Deduced) { 4826 return MarkDeducedTemplateParameters(Context, FunctionTemplate, Deduced); 4827 } 4828 static void MarkDeducedTemplateParameters(ASTContext &Ctx, 4829 FunctionTemplateDecl *FunctionTemplate, 4830 llvm::SmallBitVector &Deduced); 4831 4832 //===--------------------------------------------------------------------===// 4833 // C++ Template Instantiation 4834 // 4835 4836 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4837 const TemplateArgumentList *Innermost = 0, 4838 bool RelativeToPrimary = false, 4839 const FunctionDecl *Pattern = 0); 4840 4841 /// \brief A template instantiation that is currently in progress. 4842 struct ActiveTemplateInstantiation { 4843 /// \brief The kind of template instantiation we are performing 4844 enum InstantiationKind { 4845 /// We are instantiating a template declaration. The entity is 4846 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4847 TemplateInstantiation, 4848 4849 /// We are instantiating a default argument for a template 4850 /// parameter. The Entity is the template, and 4851 /// TemplateArgs/NumTemplateArguments provides the template 4852 /// arguments as specified. 4853 /// FIXME: Use a TemplateArgumentList 4854 DefaultTemplateArgumentInstantiation, 4855 4856 /// We are instantiating a default argument for a function. 4857 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4858 /// provides the template arguments as specified. 4859 DefaultFunctionArgumentInstantiation, 4860 4861 /// We are substituting explicit template arguments provided for 4862 /// a function template. The entity is a FunctionTemplateDecl. 4863 ExplicitTemplateArgumentSubstitution, 4864 4865 /// We are substituting template argument determined as part of 4866 /// template argument deduction for either a class template 4867 /// partial specialization or a function template. The 4868 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4869 /// a FunctionTemplateDecl. 4870 DeducedTemplateArgumentSubstitution, 4871 4872 /// We are substituting prior template arguments into a new 4873 /// template parameter. The template parameter itself is either a 4874 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4875 PriorTemplateArgumentSubstitution, 4876 4877 /// We are checking the validity of a default template argument that 4878 /// has been used when naming a template-id. 4879 DefaultTemplateArgumentChecking 4880 } Kind; 4881 4882 /// \brief The point of instantiation within the source code. 4883 SourceLocation PointOfInstantiation; 4884 4885 /// \brief The template (or partial specialization) in which we are 4886 /// performing the instantiation, for substitutions of prior template 4887 /// arguments. 4888 NamedDecl *Template; 4889 4890 /// \brief The entity that is being instantiated. 4891 uintptr_t Entity; 4892 4893 /// \brief The list of template arguments we are substituting, if they 4894 /// are not part of the entity. 4895 const TemplateArgument *TemplateArgs; 4896 4897 /// \brief The number of template arguments in TemplateArgs. 4898 unsigned NumTemplateArgs; 4899 4900 /// \brief The template deduction info object associated with the 4901 /// substitution or checking of explicit or deduced template arguments. 4902 sema::TemplateDeductionInfo *DeductionInfo; 4903 4904 /// \brief The source range that covers the construct that cause 4905 /// the instantiation, e.g., the template-id that causes a class 4906 /// template instantiation. 4907 SourceRange InstantiationRange; 4908 4909 ActiveTemplateInstantiation() 4910 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4911 NumTemplateArgs(0), DeductionInfo(0) {} 4912 4913 /// \brief Determines whether this template is an actual instantiation 4914 /// that should be counted toward the maximum instantiation depth. 4915 bool isInstantiationRecord() const; 4916 4917 friend bool operator==(const ActiveTemplateInstantiation &X, 4918 const ActiveTemplateInstantiation &Y) { 4919 if (X.Kind != Y.Kind) 4920 return false; 4921 4922 if (X.Entity != Y.Entity) 4923 return false; 4924 4925 switch (X.Kind) { 4926 case TemplateInstantiation: 4927 return true; 4928 4929 case PriorTemplateArgumentSubstitution: 4930 case DefaultTemplateArgumentChecking: 4931 if (X.Template != Y.Template) 4932 return false; 4933 4934 // Fall through 4935 4936 case DefaultTemplateArgumentInstantiation: 4937 case ExplicitTemplateArgumentSubstitution: 4938 case DeducedTemplateArgumentSubstitution: 4939 case DefaultFunctionArgumentInstantiation: 4940 return X.TemplateArgs == Y.TemplateArgs; 4941 4942 } 4943 4944 llvm_unreachable("Invalid InstantiationKind!"); 4945 } 4946 4947 friend bool operator!=(const ActiveTemplateInstantiation &X, 4948 const ActiveTemplateInstantiation &Y) { 4949 return !(X == Y); 4950 } 4951 }; 4952 4953 /// \brief List of active template instantiations. 4954 /// 4955 /// This vector is treated as a stack. As one template instantiation 4956 /// requires another template instantiation, additional 4957 /// instantiations are pushed onto the stack up to a 4958 /// user-configurable limit LangOptions::InstantiationDepth. 4959 SmallVector<ActiveTemplateInstantiation, 16> 4960 ActiveTemplateInstantiations; 4961 4962 /// \brief Whether we are in a SFINAE context that is not associated with 4963 /// template instantiation. 4964 /// 4965 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4966 /// of a template instantiation or template argument deduction. 4967 bool InNonInstantiationSFINAEContext; 4968 4969 /// \brief The number of ActiveTemplateInstantiation entries in 4970 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4971 /// therefore, should not be counted as part of the instantiation depth. 4972 unsigned NonInstantiationEntries; 4973 4974 /// \brief The last template from which a template instantiation 4975 /// error or warning was produced. 4976 /// 4977 /// This value is used to suppress printing of redundant template 4978 /// instantiation backtraces when there are multiple errors in the 4979 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4980 /// to implement it anywhere else. 4981 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4982 4983 /// \brief The current index into pack expansion arguments that will be 4984 /// used for substitution of parameter packs. 4985 /// 4986 /// The pack expansion index will be -1 to indicate that parameter packs 4987 /// should be instantiated as themselves. Otherwise, the index specifies 4988 /// which argument within the parameter pack will be used for substitution. 4989 int ArgumentPackSubstitutionIndex; 4990 4991 /// \brief RAII object used to change the argument pack substitution index 4992 /// within a \c Sema object. 4993 /// 4994 /// See \c ArgumentPackSubstitutionIndex for more information. 4995 class ArgumentPackSubstitutionIndexRAII { 4996 Sema &Self; 4997 int OldSubstitutionIndex; 4998 4999 public: 5000 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 5001 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 5002 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 5003 } 5004 5005 ~ArgumentPackSubstitutionIndexRAII() { 5006 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 5007 } 5008 }; 5009 5010 friend class ArgumentPackSubstitutionRAII; 5011 5012 /// \brief The stack of calls expression undergoing template instantiation. 5013 /// 5014 /// The top of this stack is used by a fixit instantiating unresolved 5015 /// function calls to fix the AST to match the textual change it prints. 5016 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 5017 5018 /// \brief For each declaration that involved template argument deduction, the 5019 /// set of diagnostics that were suppressed during that template argument 5020 /// deduction. 5021 /// 5022 /// FIXME: Serialize this structure to the AST file. 5023 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 5024 SuppressedDiagnostics; 5025 5026 /// \brief A stack object to be created when performing template 5027 /// instantiation. 5028 /// 5029 /// Construction of an object of type \c InstantiatingTemplate 5030 /// pushes the current instantiation onto the stack of active 5031 /// instantiations. If the size of this stack exceeds the maximum 5032 /// number of recursive template instantiations, construction 5033 /// produces an error and evaluates true. 5034 /// 5035 /// Destruction of this object will pop the named instantiation off 5036 /// the stack. 5037 struct InstantiatingTemplate { 5038 /// \brief Note that we are instantiating a class template, 5039 /// function template, or a member thereof. 5040 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5041 Decl *Entity, 5042 SourceRange InstantiationRange = SourceRange()); 5043 5044 /// \brief Note that we are instantiating a default argument in a 5045 /// template-id. 5046 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5047 TemplateDecl *Template, 5048 const TemplateArgument *TemplateArgs, 5049 unsigned NumTemplateArgs, 5050 SourceRange InstantiationRange = SourceRange()); 5051 5052 /// \brief Note that we are instantiating a default argument in a 5053 /// template-id. 5054 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5055 FunctionTemplateDecl *FunctionTemplate, 5056 const TemplateArgument *TemplateArgs, 5057 unsigned NumTemplateArgs, 5058 ActiveTemplateInstantiation::InstantiationKind Kind, 5059 sema::TemplateDeductionInfo &DeductionInfo, 5060 SourceRange InstantiationRange = SourceRange()); 5061 5062 /// \brief Note that we are instantiating as part of template 5063 /// argument deduction for a class template partial 5064 /// specialization. 5065 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5066 ClassTemplatePartialSpecializationDecl *PartialSpec, 5067 const TemplateArgument *TemplateArgs, 5068 unsigned NumTemplateArgs, 5069 sema::TemplateDeductionInfo &DeductionInfo, 5070 SourceRange InstantiationRange = SourceRange()); 5071 5072 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5073 ParmVarDecl *Param, 5074 const TemplateArgument *TemplateArgs, 5075 unsigned NumTemplateArgs, 5076 SourceRange InstantiationRange = SourceRange()); 5077 5078 /// \brief Note that we are substituting prior template arguments into a 5079 /// non-type or template template parameter. 5080 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5081 NamedDecl *Template, 5082 NonTypeTemplateParmDecl *Param, 5083 const TemplateArgument *TemplateArgs, 5084 unsigned NumTemplateArgs, 5085 SourceRange InstantiationRange); 5086 5087 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5088 NamedDecl *Template, 5089 TemplateTemplateParmDecl *Param, 5090 const TemplateArgument *TemplateArgs, 5091 unsigned NumTemplateArgs, 5092 SourceRange InstantiationRange); 5093 5094 /// \brief Note that we are checking the default template argument 5095 /// against the template parameter for a given template-id. 5096 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5097 TemplateDecl *Template, 5098 NamedDecl *Param, 5099 const TemplateArgument *TemplateArgs, 5100 unsigned NumTemplateArgs, 5101 SourceRange InstantiationRange); 5102 5103 5104 /// \brief Note that we have finished instantiating this template. 5105 void Clear(); 5106 5107 ~InstantiatingTemplate() { Clear(); } 5108 5109 /// \brief Determines whether we have exceeded the maximum 5110 /// recursive template instantiations. 5111 operator bool() const { return Invalid; } 5112 5113 private: 5114 Sema &SemaRef; 5115 bool Invalid; 5116 bool SavedInNonInstantiationSFINAEContext; 5117 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 5118 SourceRange InstantiationRange); 5119 5120 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 5121 5122 InstantiatingTemplate& 5123 operator=(const InstantiatingTemplate&); // not implemented 5124 }; 5125 5126 void PrintInstantiationStack(); 5127 5128 /// \brief Determines whether we are currently in a context where 5129 /// template argument substitution failures are not considered 5130 /// errors. 5131 /// 5132 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 5133 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 5134 /// template-deduction context object, which can be used to capture 5135 /// diagnostics that will be suppressed. 5136 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 5137 5138 /// \brief RAII class used to determine whether SFINAE has 5139 /// trapped any errors that occur during template argument 5140 /// deduction.` 5141 class SFINAETrap { 5142 Sema &SemaRef; 5143 unsigned PrevSFINAEErrors; 5144 bool PrevInNonInstantiationSFINAEContext; 5145 bool PrevAccessCheckingSFINAE; 5146 5147 public: 5148 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 5149 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 5150 PrevInNonInstantiationSFINAEContext( 5151 SemaRef.InNonInstantiationSFINAEContext), 5152 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 5153 { 5154 if (!SemaRef.isSFINAEContext()) 5155 SemaRef.InNonInstantiationSFINAEContext = true; 5156 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 5157 } 5158 5159 ~SFINAETrap() { 5160 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 5161 SemaRef.InNonInstantiationSFINAEContext 5162 = PrevInNonInstantiationSFINAEContext; 5163 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 5164 } 5165 5166 /// \brief Determine whether any SFINAE errors have been trapped. 5167 bool hasErrorOccurred() const { 5168 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 5169 } 5170 }; 5171 5172 /// \brief The current instantiation scope used to store local 5173 /// variables. 5174 LocalInstantiationScope *CurrentInstantiationScope; 5175 5176 /// \brief The number of typos corrected by CorrectTypo. 5177 unsigned TyposCorrected; 5178 5179 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 5180 UnqualifiedTyposCorrectedMap; 5181 5182 /// \brief A cache containing the results of typo correction for unqualified 5183 /// name lookup. 5184 /// 5185 /// The string is the string that we corrected to (which may be empty, if 5186 /// there was no correction), while the boolean will be true when the 5187 /// string represents a keyword. 5188 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 5189 5190 /// \brief Worker object for performing CFG-based warnings. 5191 sema::AnalysisBasedWarnings AnalysisWarnings; 5192 5193 /// \brief An entity for which implicit template instantiation is required. 5194 /// 5195 /// The source location associated with the declaration is the first place in 5196 /// the source code where the declaration was "used". It is not necessarily 5197 /// the point of instantiation (which will be either before or after the 5198 /// namespace-scope declaration that triggered this implicit instantiation), 5199 /// However, it is the location that diagnostics should generally refer to, 5200 /// because users will need to know what code triggered the instantiation. 5201 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 5202 5203 /// \brief The queue of implicit template instantiations that are required 5204 /// but have not yet been performed. 5205 std::deque<PendingImplicitInstantiation> PendingInstantiations; 5206 5207 /// \brief The queue of implicit template instantiations that are required 5208 /// and must be performed within the current local scope. 5209 /// 5210 /// This queue is only used for member functions of local classes in 5211 /// templates, which must be instantiated in the same scope as their 5212 /// enclosing function, so that they can reference function-local 5213 /// types, static variables, enumerators, etc. 5214 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 5215 5216 void PerformPendingInstantiations(bool LocalOnly = false); 5217 5218 TypeSourceInfo *SubstType(TypeSourceInfo *T, 5219 const MultiLevelTemplateArgumentList &TemplateArgs, 5220 SourceLocation Loc, DeclarationName Entity); 5221 5222 QualType SubstType(QualType T, 5223 const MultiLevelTemplateArgumentList &TemplateArgs, 5224 SourceLocation Loc, DeclarationName Entity); 5225 5226 TypeSourceInfo *SubstType(TypeLoc TL, 5227 const MultiLevelTemplateArgumentList &TemplateArgs, 5228 SourceLocation Loc, DeclarationName Entity); 5229 5230 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 5231 const MultiLevelTemplateArgumentList &TemplateArgs, 5232 SourceLocation Loc, 5233 DeclarationName Entity); 5234 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 5235 const MultiLevelTemplateArgumentList &TemplateArgs, 5236 int indexAdjustment, 5237 llvm::Optional<unsigned> NumExpansions, 5238 bool ExpectParameterPack); 5239 bool SubstParmTypes(SourceLocation Loc, 5240 ParmVarDecl **Params, unsigned NumParams, 5241 const MultiLevelTemplateArgumentList &TemplateArgs, 5242 SmallVectorImpl<QualType> &ParamTypes, 5243 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 5244 ExprResult SubstExpr(Expr *E, 5245 const MultiLevelTemplateArgumentList &TemplateArgs); 5246 5247 /// \brief Substitute the given template arguments into a list of 5248 /// expressions, expanding pack expansions if required. 5249 /// 5250 /// \param Exprs The list of expressions to substitute into. 5251 /// 5252 /// \param NumExprs The number of expressions in \p Exprs. 5253 /// 5254 /// \param IsCall Whether this is some form of call, in which case 5255 /// default arguments will be dropped. 5256 /// 5257 /// \param TemplateArgs The set of template arguments to substitute. 5258 /// 5259 /// \param Outputs Will receive all of the substituted arguments. 5260 /// 5261 /// \returns true if an error occurred, false otherwise. 5262 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 5263 const MultiLevelTemplateArgumentList &TemplateArgs, 5264 SmallVectorImpl<Expr *> &Outputs); 5265 5266 StmtResult SubstStmt(Stmt *S, 5267 const MultiLevelTemplateArgumentList &TemplateArgs); 5268 5269 Decl *SubstDecl(Decl *D, DeclContext *Owner, 5270 const MultiLevelTemplateArgumentList &TemplateArgs); 5271 5272 ExprResult SubstInitializer(Expr *E, 5273 const MultiLevelTemplateArgumentList &TemplateArgs, 5274 bool CXXDirectInit); 5275 5276 bool 5277 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 5278 CXXRecordDecl *Pattern, 5279 const MultiLevelTemplateArgumentList &TemplateArgs); 5280 5281 bool 5282 InstantiateClass(SourceLocation PointOfInstantiation, 5283 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 5284 const MultiLevelTemplateArgumentList &TemplateArgs, 5285 TemplateSpecializationKind TSK, 5286 bool Complain = true); 5287 5288 struct LateInstantiatedAttribute { 5289 const Attr *TmplAttr; 5290 LocalInstantiationScope *Scope; 5291 Decl *NewDecl; 5292 5293 LateInstantiatedAttribute(const Attr *A, LocalInstantiationScope *S, 5294 Decl *D) 5295 : TmplAttr(A), Scope(S), NewDecl(D) 5296 { } 5297 }; 5298 typedef SmallVector<LateInstantiatedAttribute, 16> LateInstantiatedAttrVec; 5299 5300 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 5301 const Decl *Pattern, Decl *Inst, 5302 LateInstantiatedAttrVec *LateAttrs = 0, 5303 LocalInstantiationScope *OuterMostScope = 0); 5304 5305 bool 5306 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 5307 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5308 TemplateSpecializationKind TSK, 5309 bool Complain = true); 5310 5311 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 5312 CXXRecordDecl *Instantiation, 5313 const MultiLevelTemplateArgumentList &TemplateArgs, 5314 TemplateSpecializationKind TSK); 5315 5316 void InstantiateClassTemplateSpecializationMembers( 5317 SourceLocation PointOfInstantiation, 5318 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5319 TemplateSpecializationKind TSK); 5320 5321 NestedNameSpecifierLoc 5322 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 5323 const MultiLevelTemplateArgumentList &TemplateArgs); 5324 5325 DeclarationNameInfo 5326 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 5327 const MultiLevelTemplateArgumentList &TemplateArgs); 5328 TemplateName 5329 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 5330 SourceLocation Loc, 5331 const MultiLevelTemplateArgumentList &TemplateArgs); 5332 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 5333 TemplateArgumentListInfo &Result, 5334 const MultiLevelTemplateArgumentList &TemplateArgs); 5335 5336 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 5337 FunctionDecl *Function, 5338 bool Recursive = false, 5339 bool DefinitionRequired = false); 5340 void InstantiateStaticDataMemberDefinition( 5341 SourceLocation PointOfInstantiation, 5342 VarDecl *Var, 5343 bool Recursive = false, 5344 bool DefinitionRequired = false); 5345 5346 void InstantiateMemInitializers(CXXConstructorDecl *New, 5347 const CXXConstructorDecl *Tmpl, 5348 const MultiLevelTemplateArgumentList &TemplateArgs); 5349 5350 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 5351 const MultiLevelTemplateArgumentList &TemplateArgs); 5352 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 5353 const MultiLevelTemplateArgumentList &TemplateArgs); 5354 5355 // Objective-C declarations. 5356 enum ObjCContainerKind { 5357 OCK_None = -1, 5358 OCK_Interface = 0, 5359 OCK_Protocol, 5360 OCK_Category, 5361 OCK_ClassExtension, 5362 OCK_Implementation, 5363 OCK_CategoryImplementation 5364 }; 5365 ObjCContainerKind getObjCContainerKind() const; 5366 5367 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 5368 IdentifierInfo *ClassName, 5369 SourceLocation ClassLoc, 5370 IdentifierInfo *SuperName, 5371 SourceLocation SuperLoc, 5372 Decl * const *ProtoRefs, 5373 unsigned NumProtoRefs, 5374 const SourceLocation *ProtoLocs, 5375 SourceLocation EndProtoLoc, 5376 AttributeList *AttrList); 5377 5378 Decl *ActOnCompatiblityAlias( 5379 SourceLocation AtCompatibilityAliasLoc, 5380 IdentifierInfo *AliasName, SourceLocation AliasLocation, 5381 IdentifierInfo *ClassName, SourceLocation ClassLocation); 5382 5383 bool CheckForwardProtocolDeclarationForCircularDependency( 5384 IdentifierInfo *PName, 5385 SourceLocation &PLoc, SourceLocation PrevLoc, 5386 const ObjCList<ObjCProtocolDecl> &PList); 5387 5388 Decl *ActOnStartProtocolInterface( 5389 SourceLocation AtProtoInterfaceLoc, 5390 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 5391 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 5392 const SourceLocation *ProtoLocs, 5393 SourceLocation EndProtoLoc, 5394 AttributeList *AttrList); 5395 5396 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 5397 IdentifierInfo *ClassName, 5398 SourceLocation ClassLoc, 5399 IdentifierInfo *CategoryName, 5400 SourceLocation CategoryLoc, 5401 Decl * const *ProtoRefs, 5402 unsigned NumProtoRefs, 5403 const SourceLocation *ProtoLocs, 5404 SourceLocation EndProtoLoc); 5405 5406 Decl *ActOnStartClassImplementation( 5407 SourceLocation AtClassImplLoc, 5408 IdentifierInfo *ClassName, SourceLocation ClassLoc, 5409 IdentifierInfo *SuperClassname, 5410 SourceLocation SuperClassLoc); 5411 5412 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 5413 IdentifierInfo *ClassName, 5414 SourceLocation ClassLoc, 5415 IdentifierInfo *CatName, 5416 SourceLocation CatLoc); 5417 5418 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc, 5419 IdentifierInfo **IdentList, 5420 SourceLocation *IdentLocs, 5421 unsigned NumElts); 5422 5423 DeclGroupPtrTy ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 5424 const IdentifierLocPair *IdentList, 5425 unsigned NumElts, 5426 AttributeList *attrList); 5427 5428 void FindProtocolDeclaration(bool WarnOnDeclarations, 5429 const IdentifierLocPair *ProtocolId, 5430 unsigned NumProtocols, 5431 SmallVectorImpl<Decl *> &Protocols); 5432 5433 /// Ensure attributes are consistent with type. 5434 /// \param [in, out] Attributes The attributes to check; they will 5435 /// be modified to be consistent with \arg PropertyTy. 5436 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5437 SourceLocation Loc, 5438 unsigned &Attributes); 5439 5440 /// Process the specified property declaration and create decls for the 5441 /// setters and getters as needed. 5442 /// \param property The property declaration being processed 5443 /// \param DC The semantic container for the property 5444 /// \param redeclaredProperty Declaration for property if redeclared 5445 /// in class extension. 5446 /// \param lexicalDC Container for redeclaredProperty. 5447 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5448 ObjCContainerDecl *DC, 5449 ObjCPropertyDecl *redeclaredProperty = 0, 5450 ObjCContainerDecl *lexicalDC = 0); 5451 5452 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5453 ObjCPropertyDecl *SuperProperty, 5454 const IdentifierInfo *Name); 5455 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5456 5457 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5458 ObjCMethodDecl *MethodDecl, 5459 bool IsInstance); 5460 5461 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5462 5463 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5464 ObjCInterfaceDecl *ID); 5465 5466 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5467 ObjCProtocolDecl *PDecl); 5468 5469 Decl *ActOnAtEnd(Scope *S, SourceRange AtEnd, 5470 Decl **allMethods = 0, unsigned allNum = 0, 5471 Decl **allProperties = 0, unsigned pNum = 0, 5472 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5473 5474 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5475 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5476 Selector GetterSel, Selector SetterSel, 5477 bool *OverridingProperty, 5478 tok::ObjCKeywordKind MethodImplKind, 5479 DeclContext *lexicalDC = 0); 5480 5481 Decl *ActOnPropertyImplDecl(Scope *S, 5482 SourceLocation AtLoc, 5483 SourceLocation PropertyLoc, 5484 bool ImplKind, 5485 IdentifierInfo *PropertyId, 5486 IdentifierInfo *PropertyIvar, 5487 SourceLocation PropertyIvarLoc); 5488 5489 enum ObjCSpecialMethodKind { 5490 OSMK_None, 5491 OSMK_Alloc, 5492 OSMK_New, 5493 OSMK_Copy, 5494 OSMK_RetainingInit, 5495 OSMK_NonRetainingInit 5496 }; 5497 5498 struct ObjCArgInfo { 5499 IdentifierInfo *Name; 5500 SourceLocation NameLoc; 5501 // The Type is null if no type was specified, and the DeclSpec is invalid 5502 // in this case. 5503 ParsedType Type; 5504 ObjCDeclSpec DeclSpec; 5505 5506 /// ArgAttrs - Attribute list for this argument. 5507 AttributeList *ArgAttrs; 5508 }; 5509 5510 Decl *ActOnMethodDeclaration( 5511 Scope *S, 5512 SourceLocation BeginLoc, // location of the + or -. 5513 SourceLocation EndLoc, // location of the ; or {. 5514 tok::TokenKind MethodType, 5515 ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5516 ArrayRef<SourceLocation> SelectorLocs, Selector Sel, 5517 // optional arguments. The number of types/arguments is obtained 5518 // from the Sel.getNumArgs(). 5519 ObjCArgInfo *ArgInfo, 5520 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5521 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5522 bool isVariadic, bool MethodDefinition); 5523 5524 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5525 // Will search "local" class/category implementations for a method decl. 5526 // Will also search in class's root looking for instance method. 5527 // Returns 0 if no method is found. 5528 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5529 ObjCInterfaceDecl *CDecl); 5530 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5531 ObjCInterfaceDecl *ClassDecl); 5532 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5533 const ObjCObjectPointerType *OPT, 5534 bool IsInstance); 5535 ObjCMethodDecl *LookupMethodInObjectType(Selector Sel, QualType Ty, 5536 bool IsInstance); 5537 5538 bool inferObjCARCLifetime(ValueDecl *decl); 5539 5540 ExprResult 5541 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5542 Expr *BaseExpr, 5543 SourceLocation OpLoc, 5544 DeclarationName MemberName, 5545 SourceLocation MemberLoc, 5546 SourceLocation SuperLoc, QualType SuperType, 5547 bool Super); 5548 5549 ExprResult 5550 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5551 IdentifierInfo &propertyName, 5552 SourceLocation receiverNameLoc, 5553 SourceLocation propertyNameLoc); 5554 5555 ObjCMethodDecl *tryCaptureObjCSelf(SourceLocation Loc); 5556 5557 /// \brief Describes the kind of message expression indicated by a message 5558 /// send that starts with an identifier. 5559 enum ObjCMessageKind { 5560 /// \brief The message is sent to 'super'. 5561 ObjCSuperMessage, 5562 /// \brief The message is an instance message. 5563 ObjCInstanceMessage, 5564 /// \brief The message is a class message, and the identifier is a type 5565 /// name. 5566 ObjCClassMessage 5567 }; 5568 5569 ObjCMessageKind getObjCMessageKind(Scope *S, 5570 IdentifierInfo *Name, 5571 SourceLocation NameLoc, 5572 bool IsSuper, 5573 bool HasTrailingDot, 5574 ParsedType &ReceiverType); 5575 5576 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5577 Selector Sel, 5578 SourceLocation LBracLoc, 5579 ArrayRef<SourceLocation> SelectorLocs, 5580 SourceLocation RBracLoc, 5581 MultiExprArg Args); 5582 5583 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5584 QualType ReceiverType, 5585 SourceLocation SuperLoc, 5586 Selector Sel, 5587 ObjCMethodDecl *Method, 5588 SourceLocation LBracLoc, 5589 ArrayRef<SourceLocation> SelectorLocs, 5590 SourceLocation RBracLoc, 5591 MultiExprArg Args, 5592 bool isImplicit = false); 5593 5594 ExprResult BuildClassMessageImplicit(QualType ReceiverType, 5595 bool isSuperReceiver, 5596 SourceLocation Loc, 5597 Selector Sel, 5598 ObjCMethodDecl *Method, 5599 MultiExprArg Args); 5600 5601 ExprResult ActOnClassMessage(Scope *S, 5602 ParsedType Receiver, 5603 Selector Sel, 5604 SourceLocation LBracLoc, 5605 ArrayRef<SourceLocation> SelectorLocs, 5606 SourceLocation RBracLoc, 5607 MultiExprArg Args); 5608 5609 ExprResult BuildInstanceMessage(Expr *Receiver, 5610 QualType ReceiverType, 5611 SourceLocation SuperLoc, 5612 Selector Sel, 5613 ObjCMethodDecl *Method, 5614 SourceLocation LBracLoc, 5615 ArrayRef<SourceLocation> SelectorLocs, 5616 SourceLocation RBracLoc, 5617 MultiExprArg Args, 5618 bool isImplicit = false); 5619 5620 ExprResult BuildInstanceMessageImplicit(Expr *Receiver, 5621 QualType ReceiverType, 5622 SourceLocation Loc, 5623 Selector Sel, 5624 ObjCMethodDecl *Method, 5625 MultiExprArg Args); 5626 5627 ExprResult ActOnInstanceMessage(Scope *S, 5628 Expr *Receiver, 5629 Selector Sel, 5630 SourceLocation LBracLoc, 5631 ArrayRef<SourceLocation> SelectorLocs, 5632 SourceLocation RBracLoc, 5633 MultiExprArg Args); 5634 5635 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5636 ObjCBridgeCastKind Kind, 5637 SourceLocation BridgeKeywordLoc, 5638 TypeSourceInfo *TSInfo, 5639 Expr *SubExpr); 5640 5641 ExprResult ActOnObjCBridgedCast(Scope *S, 5642 SourceLocation LParenLoc, 5643 ObjCBridgeCastKind Kind, 5644 SourceLocation BridgeKeywordLoc, 5645 ParsedType Type, 5646 SourceLocation RParenLoc, 5647 Expr *SubExpr); 5648 5649 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5650 5651 /// \brief Check whether the given new method is a valid override of the 5652 /// given overridden method, and set any properties that should be inherited. 5653 void CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5654 const ObjCMethodDecl *Overridden, 5655 bool IsImplementation); 5656 5657 /// \brief Check whether the given method overrides any methods in its class, 5658 /// calling \c CheckObjCMethodOverride for each overridden method. 5659 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5660 5661 enum PragmaOptionsAlignKind { 5662 POAK_Native, // #pragma options align=native 5663 POAK_Natural, // #pragma options align=natural 5664 POAK_Packed, // #pragma options align=packed 5665 POAK_Power, // #pragma options align=power 5666 POAK_Mac68k, // #pragma options align=mac68k 5667 POAK_Reset // #pragma options align=reset 5668 }; 5669 5670 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5671 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5672 SourceLocation PragmaLoc, 5673 SourceLocation KindLoc); 5674 5675 enum PragmaPackKind { 5676 PPK_Default, // #pragma pack([n]) 5677 PPK_Show, // #pragma pack(show), only supported by MSVC. 5678 PPK_Push, // #pragma pack(push, [identifier], [n]) 5679 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5680 }; 5681 5682 enum PragmaMSStructKind { 5683 PMSST_OFF, // #pragms ms_struct off 5684 PMSST_ON // #pragms ms_struct on 5685 }; 5686 5687 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5688 void ActOnPragmaPack(PragmaPackKind Kind, 5689 IdentifierInfo *Name, 5690 Expr *Alignment, 5691 SourceLocation PragmaLoc, 5692 SourceLocation LParenLoc, 5693 SourceLocation RParenLoc); 5694 5695 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5696 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5697 5698 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5699 void ActOnPragmaUnused(const Token &Identifier, 5700 Scope *curScope, 5701 SourceLocation PragmaLoc); 5702 5703 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5704 void ActOnPragmaVisibility(const IdentifierInfo* VisType, 5705 SourceLocation PragmaLoc); 5706 5707 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II, 5708 SourceLocation Loc); 5709 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5710 5711 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5712 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5713 SourceLocation PragmaLoc, 5714 SourceLocation WeakNameLoc); 5715 5716 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5717 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5718 IdentifierInfo* AliasName, 5719 SourceLocation PragmaLoc, 5720 SourceLocation WeakNameLoc, 5721 SourceLocation AliasNameLoc); 5722 5723 /// ActOnPragmaFPContract - Called on well formed 5724 /// #pragma {STDC,OPENCL} FP_CONTRACT 5725 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5726 5727 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5728 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5729 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5730 5731 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5732 void AddMsStructLayoutForRecord(RecordDecl *RD); 5733 5734 /// FreePackedContext - Deallocate and null out PackContext. 5735 void FreePackedContext(); 5736 5737 /// PushNamespaceVisibilityAttr - Note that we've entered a 5738 /// namespace with a visibility attribute. 5739 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr, 5740 SourceLocation Loc); 5741 5742 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5743 /// add an appropriate visibility attribute. 5744 void AddPushedVisibilityAttribute(Decl *RD); 5745 5746 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5747 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5748 void PopPragmaVisibility(bool IsNamespaceEnd, SourceLocation EndLoc); 5749 5750 /// FreeVisContext - Deallocate and null out VisContext. 5751 void FreeVisContext(); 5752 5753 /// AddCFAuditedAttribute - Check whether we're currently within 5754 /// '#pragma clang arc_cf_code_audited' and, if so, consider adding 5755 /// the appropriate attribute. 5756 void AddCFAuditedAttribute(Decl *D); 5757 5758 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5759 void AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E); 5760 void AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *T); 5761 5762 /// \brief The kind of conversion being performed. 5763 enum CheckedConversionKind { 5764 /// \brief An implicit conversion. 5765 CCK_ImplicitConversion, 5766 /// \brief A C-style cast. 5767 CCK_CStyleCast, 5768 /// \brief A functional-style cast. 5769 CCK_FunctionalCast, 5770 /// \brief A cast other than a C-style cast. 5771 CCK_OtherCast 5772 }; 5773 5774 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5775 /// cast. If there is already an implicit cast, merge into the existing one. 5776 /// If isLvalue, the result of the cast is an lvalue. 5777 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5778 ExprValueKind VK = VK_RValue, 5779 const CXXCastPath *BasePath = 0, 5780 CheckedConversionKind CCK 5781 = CCK_ImplicitConversion); 5782 5783 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5784 /// to the conversion from scalar type ScalarTy to the Boolean type. 5785 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5786 5787 /// IgnoredValueConversions - Given that an expression's result is 5788 /// syntactically ignored, perform any conversions that are 5789 /// required. 5790 ExprResult IgnoredValueConversions(Expr *E); 5791 5792 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5793 // functions and arrays to their respective pointers (C99 6.3.2.1). 5794 ExprResult UsualUnaryConversions(Expr *E); 5795 5796 // DefaultFunctionArrayConversion - converts functions and arrays 5797 // to their respective pointers (C99 6.3.2.1). 5798 ExprResult DefaultFunctionArrayConversion(Expr *E); 5799 5800 // DefaultFunctionArrayLvalueConversion - converts functions and 5801 // arrays to their respective pointers and performs the 5802 // lvalue-to-rvalue conversion. 5803 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5804 5805 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5806 // the operand. This is DefaultFunctionArrayLvalueConversion, 5807 // except that it assumes the operand isn't of function or array 5808 // type. 5809 ExprResult DefaultLvalueConversion(Expr *E); 5810 5811 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5812 // do not have a prototype. Integer promotions are performed on each 5813 // argument, and arguments that have type float are promoted to double. 5814 ExprResult DefaultArgumentPromotion(Expr *E); 5815 5816 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5817 enum VariadicCallType { 5818 VariadicFunction, 5819 VariadicBlock, 5820 VariadicMethod, 5821 VariadicConstructor, 5822 VariadicDoesNotApply 5823 }; 5824 5825 /// GatherArgumentsForCall - Collector argument expressions for various 5826 /// form of call prototypes. 5827 bool GatherArgumentsForCall(SourceLocation CallLoc, 5828 FunctionDecl *FDecl, 5829 const FunctionProtoType *Proto, 5830 unsigned FirstProtoArg, 5831 Expr **Args, unsigned NumArgs, 5832 SmallVector<Expr *, 8> &AllArgs, 5833 VariadicCallType CallType = VariadicDoesNotApply); 5834 5835 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5836 // will warn if the resulting type is not a POD type. 5837 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5838 FunctionDecl *FDecl); 5839 5840 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5841 // operands and then handles various conversions that are common to binary 5842 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5843 // routine returns the first non-arithmetic type found. The client is 5844 // responsible for emitting appropriate error diagnostics. 5845 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS, 5846 bool IsCompAssign = false); 5847 5848 /// AssignConvertType - All of the 'assignment' semantic checks return this 5849 /// enum to indicate whether the assignment was allowed. These checks are 5850 /// done for simple assignments, as well as initialization, return from 5851 /// function, argument passing, etc. The query is phrased in terms of a 5852 /// source and destination type. 5853 enum AssignConvertType { 5854 /// Compatible - the types are compatible according to the standard. 5855 Compatible, 5856 5857 /// PointerToInt - The assignment converts a pointer to an int, which we 5858 /// accept as an extension. 5859 PointerToInt, 5860 5861 /// IntToPointer - The assignment converts an int to a pointer, which we 5862 /// accept as an extension. 5863 IntToPointer, 5864 5865 /// FunctionVoidPointer - The assignment is between a function pointer and 5866 /// void*, which the standard doesn't allow, but we accept as an extension. 5867 FunctionVoidPointer, 5868 5869 /// IncompatiblePointer - The assignment is between two pointers types that 5870 /// are not compatible, but we accept them as an extension. 5871 IncompatiblePointer, 5872 5873 /// IncompatiblePointer - The assignment is between two pointers types which 5874 /// point to integers which have a different sign, but are otherwise 5875 /// identical. This is a subset of the above, but broken out because it's by 5876 /// far the most common case of incompatible pointers. 5877 IncompatiblePointerSign, 5878 5879 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5880 /// c/v/r qualifiers, which we accept as an extension. 5881 CompatiblePointerDiscardsQualifiers, 5882 5883 /// IncompatiblePointerDiscardsQualifiers - The assignment 5884 /// discards qualifiers that we don't permit to be discarded, 5885 /// like address spaces. 5886 IncompatiblePointerDiscardsQualifiers, 5887 5888 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5889 /// nested pointer types, and the qualifiers other than the first two 5890 /// levels differ e.g. char ** -> const char **, but we accept them as an 5891 /// extension. 5892 IncompatibleNestedPointerQualifiers, 5893 5894 /// IncompatibleVectors - The assignment is between two vector types that 5895 /// have the same size, which we accept as an extension. 5896 IncompatibleVectors, 5897 5898 /// IntToBlockPointer - The assignment converts an int to a block 5899 /// pointer. We disallow this. 5900 IntToBlockPointer, 5901 5902 /// IncompatibleBlockPointer - The assignment is between two block 5903 /// pointers types that are not compatible. 5904 IncompatibleBlockPointer, 5905 5906 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5907 /// id type and something else (that is incompatible with it). For example, 5908 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5909 IncompatibleObjCQualifiedId, 5910 5911 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 5912 /// object with __weak qualifier. 5913 IncompatibleObjCWeakRef, 5914 5915 /// Incompatible - We reject this conversion outright, it is invalid to 5916 /// represent it in the AST. 5917 Incompatible 5918 }; 5919 5920 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5921 /// assignment conversion type specified by ConvTy. This returns true if the 5922 /// conversion was invalid or false if the conversion was accepted. 5923 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5924 SourceLocation Loc, 5925 QualType DstType, QualType SrcType, 5926 Expr *SrcExpr, AssignmentAction Action, 5927 bool *Complained = 0); 5928 5929 /// CheckAssignmentConstraints - Perform type checking for assignment, 5930 /// argument passing, variable initialization, and function return values. 5931 /// C99 6.5.16. 5932 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5933 QualType LHSType, 5934 QualType RHSType); 5935 5936 /// Check assignment constraints and prepare for a conversion of the 5937 /// RHS to the LHS type. 5938 AssignConvertType CheckAssignmentConstraints(QualType LHSType, 5939 ExprResult &RHS, 5940 CastKind &Kind); 5941 5942 // CheckSingleAssignmentConstraints - Currently used by 5943 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5944 // this routine performs the default function/array converions. 5945 AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType, 5946 ExprResult &RHS, 5947 bool Diagnose = true); 5948 5949 // \brief If the lhs type is a transparent union, check whether we 5950 // can initialize the transparent union with the given expression. 5951 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType, 5952 ExprResult &RHS); 5953 5954 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5955 5956 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5957 5958 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5959 AssignmentAction Action, 5960 bool AllowExplicit = false); 5961 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5962 AssignmentAction Action, 5963 bool AllowExplicit, 5964 ImplicitConversionSequence& ICS); 5965 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5966 const ImplicitConversionSequence& ICS, 5967 AssignmentAction Action, 5968 CheckedConversionKind CCK 5969 = CCK_ImplicitConversion); 5970 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5971 const StandardConversionSequence& SCS, 5972 AssignmentAction Action, 5973 CheckedConversionKind CCK); 5974 5975 /// the following "Check" methods will return a valid/converted QualType 5976 /// or a null QualType (indicating an error diagnostic was issued). 5977 5978 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5979 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS, 5980 ExprResult &RHS); 5981 QualType CheckPointerToMemberOperands( // C++ 5.5 5982 ExprResult &LHS, ExprResult &RHS, ExprValueKind &VK, 5983 SourceLocation OpLoc, bool isIndirect); 5984 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5985 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign, 5986 bool IsDivide); 5987 QualType CheckRemainderOperands( // C99 6.5.5 5988 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5989 bool IsCompAssign = false); 5990 QualType CheckAdditionOperands( // C99 6.5.6 5991 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5992 QualType* CompLHSTy = 0); 5993 QualType CheckSubtractionOperands( // C99 6.5.6 5994 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5995 QualType* CompLHSTy = 0); 5996 QualType CheckShiftOperands( // C99 6.5.7 5997 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 5998 bool IsCompAssign = false); 5999 QualType CheckCompareOperands( // C99 6.5.8/9 6000 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned OpaqueOpc, 6001 bool isRelational); 6002 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 6003 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6004 bool IsCompAssign = false); 6005 QualType CheckLogicalOperands( // C99 6.5.[13,14] 6006 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc); 6007 // CheckAssignmentOperands is used for both simple and compound assignment. 6008 // For simple assignment, pass both expressions and a null converted type. 6009 // For compound assignment, pass both expressions and the converted type. 6010 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 6011 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType); 6012 6013 ExprResult checkPseudoObjectIncDec(Scope *S, SourceLocation OpLoc, 6014 UnaryOperatorKind Opcode, Expr *Op); 6015 ExprResult checkPseudoObjectAssignment(Scope *S, SourceLocation OpLoc, 6016 BinaryOperatorKind Opcode, 6017 Expr *LHS, Expr *RHS); 6018 ExprResult checkPseudoObjectRValue(Expr *E); 6019 Expr *recreateSyntacticForm(PseudoObjectExpr *E); 6020 6021 QualType CheckConditionalOperands( // C99 6.5.15 6022 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS, 6023 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc); 6024 QualType CXXCheckConditionalOperands( // C++ 5.16 6025 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 6026 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 6027 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 6028 bool *NonStandardCompositeType = 0); 6029 QualType FindCompositePointerType(SourceLocation Loc, 6030 ExprResult &E1, ExprResult &E2, 6031 bool *NonStandardCompositeType = 0) { 6032 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 6033 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, 6034 NonStandardCompositeType); 6035 E1 = Owned(E1Tmp); 6036 E2 = Owned(E2Tmp); 6037 return Composite; 6038 } 6039 6040 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 6041 SourceLocation QuestionLoc); 6042 6043 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr, 6044 SourceLocation QuestionLoc); 6045 6046 /// type checking for vector binary operators. 6047 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS, 6048 SourceLocation Loc, bool IsCompAssign); 6049 QualType GetSignedVectorType(QualType V); 6050 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS, 6051 SourceLocation Loc, bool isRelational); 6052 QualType CheckVectorLogicalOperands(ExprResult &LHS, ExprResult &RHS, 6053 SourceLocation Loc); 6054 6055 /// type checking declaration initializers (C99 6.7.8) 6056 bool CheckForConstantInitializer(Expr *e, QualType t); 6057 6058 // type checking C++ declaration initializers (C++ [dcl.init]). 6059 6060 /// ReferenceCompareResult - Expresses the result of comparing two 6061 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 6062 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 6063 enum ReferenceCompareResult { 6064 /// Ref_Incompatible - The two types are incompatible, so direct 6065 /// reference binding is not possible. 6066 Ref_Incompatible = 0, 6067 /// Ref_Related - The two types are reference-related, which means 6068 /// that their unqualified forms (T1 and T2) are either the same 6069 /// or T1 is a base class of T2. 6070 Ref_Related, 6071 /// Ref_Compatible_With_Added_Qualification - The two types are 6072 /// reference-compatible with added qualification, meaning that 6073 /// they are reference-compatible and the qualifiers on T1 (cv1) 6074 /// are greater than the qualifiers on T2 (cv2). 6075 Ref_Compatible_With_Added_Qualification, 6076 /// Ref_Compatible - The two types are reference-compatible and 6077 /// have equivalent qualifiers (cv1 == cv2). 6078 Ref_Compatible 6079 }; 6080 6081 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 6082 QualType T1, QualType T2, 6083 bool &DerivedToBase, 6084 bool &ObjCConversion, 6085 bool &ObjCLifetimeConversion); 6086 6087 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType, 6088 Expr *CastExpr, CastKind &CastKind, 6089 ExprValueKind &VK, CXXCastPath &Path); 6090 6091 /// \brief Force an expression with unknown-type to an expression of the 6092 /// given type. 6093 ExprResult forceUnknownAnyToType(Expr *E, QualType ToType); 6094 6095 // CheckVectorCast - check type constraints for vectors. 6096 // Since vectors are an extension, there are no C standard reference for this. 6097 // We allow casting between vectors and integer datatypes of the same size. 6098 // returns true if the cast is invalid 6099 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 6100 CastKind &Kind); 6101 6102 // CheckExtVectorCast - check type constraints for extended vectors. 6103 // Since vectors are an extension, there are no C standard reference for this. 6104 // We allow casting between vectors and integer datatypes of the same size, 6105 // or vectors and the element type of that vector. 6106 // returns the cast expr 6107 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr, 6108 CastKind &Kind); 6109 6110 ExprResult BuildCXXFunctionalCastExpr(TypeSourceInfo *TInfo, 6111 SourceLocation LParenLoc, 6112 Expr *CastExpr, 6113 SourceLocation RParenLoc); 6114 6115 enum ARCConversionResult { ACR_okay, ACR_unbridged }; 6116 6117 /// \brief Checks for invalid conversions and casts between 6118 /// retainable pointers and other pointer kinds. 6119 ARCConversionResult CheckObjCARCConversion(SourceRange castRange, 6120 QualType castType, Expr *&op, 6121 CheckedConversionKind CCK); 6122 6123 Expr *stripARCUnbridgedCast(Expr *e); 6124 void diagnoseARCUnbridgedCast(Expr *e); 6125 6126 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 6127 QualType ExprType); 6128 6129 /// checkRetainCycles - Check whether an Objective-C message send 6130 /// might create an obvious retain cycle. 6131 void checkRetainCycles(ObjCMessageExpr *msg); 6132 void checkRetainCycles(Expr *receiver, Expr *argument); 6133 6134 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 6135 /// to weak/__unsafe_unretained type. 6136 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 6137 6138 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 6139 /// to weak/__unsafe_unretained expression. 6140 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 6141 6142 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 6143 /// \param Method - May be null. 6144 /// \param [out] ReturnType - The return type of the send. 6145 /// \return true iff there were any incompatible types. 6146 bool CheckMessageArgumentTypes(QualType ReceiverType, 6147 Expr **Args, unsigned NumArgs, Selector Sel, 6148 ObjCMethodDecl *Method, bool isClassMessage, 6149 bool isSuperMessage, 6150 SourceLocation lbrac, SourceLocation rbrac, 6151 QualType &ReturnType, ExprValueKind &VK); 6152 6153 /// \brief Determine the result of a message send expression based on 6154 /// the type of the receiver, the method expected to receive the message, 6155 /// and the form of the message send. 6156 QualType getMessageSendResultType(QualType ReceiverType, 6157 ObjCMethodDecl *Method, 6158 bool isClassMessage, bool isSuperMessage); 6159 6160 /// \brief If the given expression involves a message send to a method 6161 /// with a related result type, emit a note describing what happened. 6162 void EmitRelatedResultTypeNote(const Expr *E); 6163 6164 /// CheckBooleanCondition - Diagnose problems involving the use of 6165 /// the given expression as a boolean condition (e.g. in an if 6166 /// statement). Also performs the standard function and array 6167 /// decays, possibly changing the input variable. 6168 /// 6169 /// \param Loc - A location associated with the condition, e.g. the 6170 /// 'if' keyword. 6171 /// \return true iff there were any errors 6172 ExprResult CheckBooleanCondition(Expr *E, SourceLocation Loc); 6173 6174 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 6175 Expr *SubExpr); 6176 6177 /// DiagnoseAssignmentAsCondition - Given that an expression is 6178 /// being used as a boolean condition, warn if it's an assignment. 6179 void DiagnoseAssignmentAsCondition(Expr *E); 6180 6181 /// \brief Redundant parentheses over an equality comparison can indicate 6182 /// that the user intended an assignment used as condition. 6183 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE); 6184 6185 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 6186 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 6187 6188 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 6189 /// the specified width and sign. If an overflow occurs, detect it and emit 6190 /// the specified diagnostic. 6191 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 6192 unsigned NewWidth, bool NewSign, 6193 SourceLocation Loc, unsigned DiagID); 6194 6195 /// Checks that the Objective-C declaration is declared in the global scope. 6196 /// Emits an error and marks the declaration as invalid if it's not declared 6197 /// in the global scope. 6198 bool CheckObjCDeclScope(Decl *D); 6199 6200 /// VerifyIntegerConstantExpression - Verifies that an expression is an ICE, 6201 /// and reports the appropriate diagnostics. Returns false on success. 6202 /// Can optionally return the value of the expression. 6203 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, 6204 PartialDiagnostic Diag, 6205 bool AllowFold, 6206 PartialDiagnostic FoldDiag); 6207 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, 6208 PartialDiagnostic Diag, 6209 bool AllowFold = true) { 6210 return VerifyIntegerConstantExpression(E, Result, Diag, AllowFold, 6211 PDiag(0)); 6212 } 6213 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result = 0); 6214 6215 /// VerifyBitField - verifies that a bit field expression is an ICE and has 6216 /// the correct width, and that the field type is valid. 6217 /// Returns false on success. 6218 /// Can optionally return whether the bit-field is of width 0 6219 ExprResult VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 6220 QualType FieldTy, Expr *BitWidth, 6221 bool *ZeroWidth = 0); 6222 6223 enum CUDAFunctionTarget { 6224 CFT_Device, 6225 CFT_Global, 6226 CFT_Host, 6227 CFT_HostDevice 6228 }; 6229 6230 CUDAFunctionTarget IdentifyCUDATarget(const FunctionDecl *D); 6231 6232 bool CheckCUDATarget(CUDAFunctionTarget CallerTarget, 6233 CUDAFunctionTarget CalleeTarget); 6234 6235 bool CheckCUDATarget(const FunctionDecl *Caller, const FunctionDecl *Callee) { 6236 return CheckCUDATarget(IdentifyCUDATarget(Caller), 6237 IdentifyCUDATarget(Callee)); 6238 } 6239 6240 /// \name Code completion 6241 //@{ 6242 /// \brief Describes the context in which code completion occurs. 6243 enum ParserCompletionContext { 6244 /// \brief Code completion occurs at top-level or namespace context. 6245 PCC_Namespace, 6246 /// \brief Code completion occurs within a class, struct, or union. 6247 PCC_Class, 6248 /// \brief Code completion occurs within an Objective-C interface, protocol, 6249 /// or category. 6250 PCC_ObjCInterface, 6251 /// \brief Code completion occurs within an Objective-C implementation or 6252 /// category implementation 6253 PCC_ObjCImplementation, 6254 /// \brief Code completion occurs within the list of instance variables 6255 /// in an Objective-C interface, protocol, category, or implementation. 6256 PCC_ObjCInstanceVariableList, 6257 /// \brief Code completion occurs following one or more template 6258 /// headers. 6259 PCC_Template, 6260 /// \brief Code completion occurs following one or more template 6261 /// headers within a class. 6262 PCC_MemberTemplate, 6263 /// \brief Code completion occurs within an expression. 6264 PCC_Expression, 6265 /// \brief Code completion occurs within a statement, which may 6266 /// also be an expression or a declaration. 6267 PCC_Statement, 6268 /// \brief Code completion occurs at the beginning of the 6269 /// initialization statement (or expression) in a for loop. 6270 PCC_ForInit, 6271 /// \brief Code completion occurs within the condition of an if, 6272 /// while, switch, or for statement. 6273 PCC_Condition, 6274 /// \brief Code completion occurs within the body of a function on a 6275 /// recovery path, where we do not have a specific handle on our position 6276 /// in the grammar. 6277 PCC_RecoveryInFunction, 6278 /// \brief Code completion occurs where only a type is permitted. 6279 PCC_Type, 6280 /// \brief Code completion occurs in a parenthesized expression, which 6281 /// might also be a type cast. 6282 PCC_ParenthesizedExpression, 6283 /// \brief Code completion occurs within a sequence of declaration 6284 /// specifiers within a function, method, or block. 6285 PCC_LocalDeclarationSpecifiers 6286 }; 6287 6288 void CodeCompleteModuleImport(SourceLocation ImportLoc, ModuleIdPath Path); 6289 void CodeCompleteOrdinaryName(Scope *S, 6290 ParserCompletionContext CompletionContext); 6291 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 6292 bool AllowNonIdentifiers, 6293 bool AllowNestedNameSpecifiers); 6294 6295 struct CodeCompleteExpressionData; 6296 void CodeCompleteExpression(Scope *S, 6297 const CodeCompleteExpressionData &Data); 6298 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 6299 SourceLocation OpLoc, 6300 bool IsArrow); 6301 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 6302 void CodeCompleteTag(Scope *S, unsigned TagSpec); 6303 void CodeCompleteTypeQualifiers(DeclSpec &DS); 6304 void CodeCompleteCase(Scope *S); 6305 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 6306 void CodeCompleteInitializer(Scope *S, Decl *D); 6307 void CodeCompleteReturn(Scope *S); 6308 void CodeCompleteAfterIf(Scope *S); 6309 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 6310 6311 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 6312 bool EnteringContext); 6313 void CodeCompleteUsing(Scope *S); 6314 void CodeCompleteUsingDirective(Scope *S); 6315 void CodeCompleteNamespaceDecl(Scope *S); 6316 void CodeCompleteNamespaceAliasDecl(Scope *S); 6317 void CodeCompleteOperatorName(Scope *S); 6318 void CodeCompleteConstructorInitializer(Decl *Constructor, 6319 CXXCtorInitializer** Initializers, 6320 unsigned NumInitializers); 6321 void CodeCompleteLambdaIntroducer(Scope *S, LambdaIntroducer &Intro, 6322 bool AfterAmpersand); 6323 6324 void CodeCompleteObjCAtDirective(Scope *S); 6325 void CodeCompleteObjCAtVisibility(Scope *S); 6326 void CodeCompleteObjCAtStatement(Scope *S); 6327 void CodeCompleteObjCAtExpression(Scope *S); 6328 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 6329 void CodeCompleteObjCPropertyGetter(Scope *S); 6330 void CodeCompleteObjCPropertySetter(Scope *S); 6331 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 6332 bool IsParameter); 6333 void CodeCompleteObjCMessageReceiver(Scope *S); 6334 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 6335 IdentifierInfo **SelIdents, 6336 unsigned NumSelIdents, 6337 bool AtArgumentExpression); 6338 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 6339 IdentifierInfo **SelIdents, 6340 unsigned NumSelIdents, 6341 bool AtArgumentExpression, 6342 bool IsSuper = false); 6343 void CodeCompleteObjCInstanceMessage(Scope *S, Expr *Receiver, 6344 IdentifierInfo **SelIdents, 6345 unsigned NumSelIdents, 6346 bool AtArgumentExpression, 6347 ObjCInterfaceDecl *Super = 0); 6348 void CodeCompleteObjCForCollection(Scope *S, 6349 DeclGroupPtrTy IterationVar); 6350 void CodeCompleteObjCSelector(Scope *S, 6351 IdentifierInfo **SelIdents, 6352 unsigned NumSelIdents); 6353 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 6354 unsigned NumProtocols); 6355 void CodeCompleteObjCProtocolDecl(Scope *S); 6356 void CodeCompleteObjCInterfaceDecl(Scope *S); 6357 void CodeCompleteObjCSuperclass(Scope *S, 6358 IdentifierInfo *ClassName, 6359 SourceLocation ClassNameLoc); 6360 void CodeCompleteObjCImplementationDecl(Scope *S); 6361 void CodeCompleteObjCInterfaceCategory(Scope *S, 6362 IdentifierInfo *ClassName, 6363 SourceLocation ClassNameLoc); 6364 void CodeCompleteObjCImplementationCategory(Scope *S, 6365 IdentifierInfo *ClassName, 6366 SourceLocation ClassNameLoc); 6367 void CodeCompleteObjCPropertyDefinition(Scope *S); 6368 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 6369 IdentifierInfo *PropertyName); 6370 void CodeCompleteObjCMethodDecl(Scope *S, 6371 bool IsInstanceMethod, 6372 ParsedType ReturnType); 6373 void CodeCompleteObjCMethodDeclSelector(Scope *S, 6374 bool IsInstanceMethod, 6375 bool AtParameterName, 6376 ParsedType ReturnType, 6377 IdentifierInfo **SelIdents, 6378 unsigned NumSelIdents); 6379 void CodeCompletePreprocessorDirective(bool InConditional); 6380 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 6381 void CodeCompletePreprocessorMacroName(bool IsDefinition); 6382 void CodeCompletePreprocessorExpression(); 6383 void CodeCompletePreprocessorMacroArgument(Scope *S, 6384 IdentifierInfo *Macro, 6385 MacroInfo *MacroInfo, 6386 unsigned Argument); 6387 void CodeCompleteNaturalLanguage(); 6388 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 6389 SmallVectorImpl<CodeCompletionResult> &Results); 6390 //@} 6391 6392 //===--------------------------------------------------------------------===// 6393 // Extra semantic analysis beyond the C type system 6394 6395public: 6396 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 6397 unsigned ByteNo) const; 6398 6399private: 6400 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr, 6401 const ArraySubscriptExpr *ASE=0, 6402 bool AllowOnePastEnd=true, bool IndexNegated=false); 6403 void CheckArrayAccess(const Expr *E); 6404 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 6405 bool CheckObjCMethodCall(ObjCMethodDecl *Method, SourceLocation loc, 6406 Expr **Args, unsigned NumArgs); 6407 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 6408 6409 bool CheckObjCString(Expr *Arg); 6410 6411 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6412 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6413 6414 bool SemaBuiltinVAStart(CallExpr *TheCall); 6415 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 6416 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 6417 6418public: 6419 // Used by C++ template instantiation. 6420 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 6421 6422private: 6423 bool SemaBuiltinPrefetch(CallExpr *TheCall); 6424 bool SemaBuiltinObjectSize(CallExpr *TheCall); 6425 bool SemaBuiltinLongjmp(CallExpr *TheCall); 6426 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 6427 ExprResult SemaAtomicOpsOverloaded(ExprResult TheCallResult, 6428 AtomicExpr::AtomicOp Op); 6429 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 6430 llvm::APSInt &Result); 6431 6432 enum FormatStringType { 6433 FST_Scanf, 6434 FST_Printf, 6435 FST_NSString, 6436 FST_Strftime, 6437 FST_Strfmon, 6438 FST_Kprintf, 6439 FST_Unknown 6440 }; 6441 static FormatStringType GetFormatStringType(const FormatAttr *Format); 6442 bool SemaCheckStringLiteral(const Expr *E, Expr **Args, unsigned NumArgs, 6443 bool HasVAListArg, unsigned format_idx, 6444 unsigned firstDataArg, FormatStringType Type, 6445 bool inFunctionCall = true); 6446 6447 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 6448 Expr **Args, unsigned NumArgs, bool HasVAListArg, 6449 unsigned format_idx, unsigned firstDataArg, 6450 FormatStringType Type, bool inFunctionCall); 6451 6452 void CheckFormatArguments(const FormatAttr *Format, CallExpr *TheCall); 6453 void CheckFormatArguments(const FormatAttr *Format, Expr **Args, 6454 unsigned NumArgs, bool IsCXXMember, 6455 SourceLocation Loc, SourceRange Range); 6456 void CheckFormatArguments(Expr **Args, unsigned NumArgs, 6457 bool HasVAListArg, unsigned format_idx, 6458 unsigned firstDataArg, FormatStringType Type, 6459 SourceLocation Loc, SourceRange range); 6460 6461 void CheckNonNullArguments(const NonNullAttr *NonNull, 6462 const Expr * const *ExprArgs, 6463 SourceLocation CallSiteLoc); 6464 6465 void CheckMemaccessArguments(const CallExpr *Call, 6466 unsigned BId, 6467 IdentifierInfo *FnName); 6468 6469 void CheckStrlcpycatArguments(const CallExpr *Call, 6470 IdentifierInfo *FnName); 6471 6472 void CheckStrncatArguments(const CallExpr *Call, 6473 IdentifierInfo *FnName); 6474 6475 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 6476 SourceLocation ReturnLoc); 6477 void CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr* RHS); 6478 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 6479 6480 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 6481 Expr *Init); 6482 6483 /// \brief The parser's current scope. 6484 /// 6485 /// The parser maintains this state here. 6486 Scope *CurScope; 6487 6488protected: 6489 friend class Parser; 6490 friend class InitializationSequence; 6491 friend class ASTReader; 6492 friend class ASTWriter; 6493 6494public: 6495 /// \brief Retrieve the parser's current scope. 6496 /// 6497 /// This routine must only be used when it is certain that semantic analysis 6498 /// and the parser are in precisely the same context, which is not the case 6499 /// when, e.g., we are performing any kind of template instantiation. 6500 /// Therefore, the only safe places to use this scope are in the parser 6501 /// itself and in routines directly invoked from the parser and *never* from 6502 /// template substitution or instantiation. 6503 Scope *getCurScope() const { return CurScope; } 6504 6505 Decl *getObjCDeclContext() const; 6506 6507 DeclContext *getCurLexicalContext() const { 6508 return OriginalLexicalContext ? OriginalLexicalContext : CurContext; 6509 } 6510 6511 AvailabilityResult getCurContextAvailability() const; 6512}; 6513 6514/// \brief RAII object that enters a new expression evaluation context. 6515class EnterExpressionEvaluationContext { 6516 Sema &Actions; 6517 6518public: 6519 EnterExpressionEvaluationContext(Sema &Actions, 6520 Sema::ExpressionEvaluationContext NewContext) 6521 : Actions(Actions) { 6522 Actions.PushExpressionEvaluationContext(NewContext); 6523 } 6524 6525 ~EnterExpressionEvaluationContext() { 6526 Actions.PopExpressionEvaluationContext(); 6527 } 6528}; 6529 6530} // end namespace clang 6531 6532#endif 6533