Sema.h revision 8adc227de934e23c72eb8d9abf5c0e3dfffec131
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/AST/Expr.h" 24#include "clang/AST/DeclarationName.h" 25#include "clang/AST/ExternalASTSource.h" 26#include "clang/AST/TypeLoc.h" 27#include "clang/Basic/Specifiers.h" 28#include "clang/Basic/TemplateKinds.h" 29#include "clang/Basic/TypeTraits.h" 30#include "clang/Basic/ExpressionTraits.h" 31#include "llvm/ADT/OwningPtr.h" 32#include "llvm/ADT/SmallPtrSet.h" 33#include "llvm/ADT/SmallVector.h" 34#include <deque> 35#include <string> 36 37namespace llvm { 38 class APSInt; 39 template <typename ValueT> struct DenseMapInfo; 40 template <typename ValueT, typename ValueInfoT> class DenseSet; 41} 42 43namespace clang { 44 class ADLResult; 45 class ASTConsumer; 46 class ASTContext; 47 class ASTMutationListener; 48 class ArrayType; 49 class AttributeList; 50 class BlockDecl; 51 class CXXBasePath; 52 class CXXBasePaths; 53 typedef llvm::SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 54 class CXXConstructorDecl; 55 class CXXConversionDecl; 56 class CXXDestructorDecl; 57 class CXXFieldCollector; 58 class CXXMemberCallExpr; 59 class CXXMethodDecl; 60 class CXXScopeSpec; 61 class CXXTemporary; 62 class CXXTryStmt; 63 class CallExpr; 64 class ClassTemplateDecl; 65 class ClassTemplatePartialSpecializationDecl; 66 class ClassTemplateSpecializationDecl; 67 class CodeCompleteConsumer; 68 class CodeCompletionAllocator; 69 class CodeCompletionResult; 70 class Decl; 71 class DeclAccessPair; 72 class DeclContext; 73 class DeclRefExpr; 74 class DeclaratorDecl; 75 class DeducedTemplateArgument; 76 class DependentDiagnostic; 77 class DesignatedInitExpr; 78 class Designation; 79 class EnumConstantDecl; 80 class Expr; 81 class ExtVectorType; 82 class ExternalSemaSource; 83 class FormatAttr; 84 class FriendDecl; 85 class FunctionDecl; 86 class FunctionProtoType; 87 class FunctionTemplateDecl; 88 class ImplicitConversionSequence; 89 class InitListExpr; 90 class InitializationKind; 91 class InitializationSequence; 92 class InitializedEntity; 93 class IntegerLiteral; 94 class LabelStmt; 95 class LangOptions; 96 class LocalInstantiationScope; 97 class LookupResult; 98 class MacroInfo; 99 class MultiLevelTemplateArgumentList; 100 class NamedDecl; 101 class NonNullAttr; 102 class ObjCCategoryDecl; 103 class ObjCCategoryImplDecl; 104 class ObjCCompatibleAliasDecl; 105 class ObjCContainerDecl; 106 class ObjCImplDecl; 107 class ObjCImplementationDecl; 108 class ObjCInterfaceDecl; 109 class ObjCIvarDecl; 110 template <class T> class ObjCList; 111 class ObjCMethodDecl; 112 class ObjCPropertyDecl; 113 class ObjCProtocolDecl; 114 class OverloadCandidateSet; 115 class OverloadExpr; 116 class ParenListExpr; 117 class ParmVarDecl; 118 class Preprocessor; 119 class PseudoDestructorTypeStorage; 120 class QualType; 121 class StandardConversionSequence; 122 class Stmt; 123 class StringLiteral; 124 class SwitchStmt; 125 class TargetAttributesSema; 126 class TemplateArgument; 127 class TemplateArgumentList; 128 class TemplateArgumentLoc; 129 class TemplateDecl; 130 class TemplateParameterList; 131 class TemplatePartialOrderingContext; 132 class TemplateTemplateParmDecl; 133 class Token; 134 class TypeAliasDecl; 135 class TypedefDecl; 136 class TypedefNameDecl; 137 class TypeLoc; 138 class UnqualifiedId; 139 class UnresolvedLookupExpr; 140 class UnresolvedMemberExpr; 141 class UnresolvedSetImpl; 142 class UnresolvedSetIterator; 143 class UsingDecl; 144 class UsingShadowDecl; 145 class ValueDecl; 146 class VarDecl; 147 class VisibilityAttr; 148 class VisibleDeclConsumer; 149 class IndirectFieldDecl; 150 151namespace sema { 152 class AccessedEntity; 153 class BlockScopeInfo; 154 class DelayedDiagnostic; 155 class FunctionScopeInfo; 156 class TemplateDeductionInfo; 157} 158 159/// \brief Holds a QualType and a TypeSourceInfo* that came out of a declarator 160/// parsing. 161/// 162/// LocInfoType is a "transient" type, only needed for passing to/from Parser 163/// and Sema, when we want to preserve type source info for a parsed type. 164/// It will not participate in the type system semantics in any way. 165class LocInfoType : public Type { 166 enum { 167 // The last number that can fit in Type's TC. 168 // Avoids conflict with an existing Type class. 169 LocInfo = Type::TypeLast + 1 170 }; 171 172 TypeSourceInfo *DeclInfo; 173 174 LocInfoType(QualType ty, TypeSourceInfo *TInfo) 175 : Type((TypeClass)LocInfo, ty, ty->isDependentType(), 176 ty->isVariablyModifiedType(), 177 ty->containsUnexpandedParameterPack()), 178 DeclInfo(TInfo) { 179 assert(getTypeClass() == (TypeClass)LocInfo && "LocInfo didn't fit in TC?"); 180 } 181 friend class Sema; 182 183public: 184 QualType getType() const { return getCanonicalTypeInternal(); } 185 TypeSourceInfo *getTypeSourceInfo() const { return DeclInfo; } 186 187 void getAsStringInternal(std::string &Str, 188 const PrintingPolicy &Policy) const; 189 190 static bool classof(const Type *T) { 191 return T->getTypeClass() == (TypeClass)LocInfo; 192 } 193 static bool classof(const LocInfoType *) { return true; } 194}; 195 196// FIXME: No way to easily map from TemplateTypeParmTypes to 197// TemplateTypeParmDecls, so we have this horrible PointerUnion. 198typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 199 SourceLocation> UnexpandedParameterPack; 200 201/// Sema - This implements semantic analysis and AST building for C. 202class Sema { 203 Sema(const Sema&); // DO NOT IMPLEMENT 204 void operator=(const Sema&); // DO NOT IMPLEMENT 205 mutable const TargetAttributesSema* TheTargetAttributesSema; 206public: 207 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 208 typedef OpaquePtr<TemplateName> TemplateTy; 209 typedef OpaquePtr<QualType> TypeTy; 210 typedef Attr AttrTy; 211 typedef CXXBaseSpecifier BaseTy; 212 typedef CXXCtorInitializer MemInitTy; 213 typedef Expr ExprTy; 214 typedef Stmt StmtTy; 215 typedef TemplateParameterList TemplateParamsTy; 216 typedef NestedNameSpecifier CXXScopeTy; 217 218 OpenCLOptions OpenCLFeatures; 219 FPOptions FPFeatures; 220 221 const LangOptions &LangOpts; 222 Preprocessor &PP; 223 ASTContext &Context; 224 ASTConsumer &Consumer; 225 Diagnostic &Diags; 226 SourceManager &SourceMgr; 227 228 /// \brief Source of additional semantic information. 229 ExternalSemaSource *ExternalSource; 230 231 /// \brief Code-completion consumer. 232 CodeCompleteConsumer *CodeCompleter; 233 234 /// CurContext - This is the current declaration context of parsing. 235 DeclContext *CurContext; 236 237 /// VAListTagName - The declaration name corresponding to __va_list_tag. 238 /// This is used as part of a hack to omit that class from ADL results. 239 DeclarationName VAListTagName; 240 241 /// PackContext - Manages the stack for #pragma pack. An alignment 242 /// of 0 indicates default alignment. 243 void *PackContext; // Really a "PragmaPackStack*" 244 245 bool MSStructPragmaOn; // True when #pragma ms_struct on 246 247 /// VisContext - Manages the stack for #pragma GCC visibility. 248 void *VisContext; // Really a "PragmaVisStack*" 249 250 /// \brief Stack containing information about each of the nested 251 /// function, block, and method scopes that are currently active. 252 /// 253 /// This array is never empty. Clients should ignore the first 254 /// element, which is used to cache a single FunctionScopeInfo 255 /// that's used to parse every top-level function. 256 llvm::SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 257 258 /// ExprTemporaries - This is the stack of temporaries that are created by 259 /// the current full expression. 260 llvm::SmallVector<CXXTemporary*, 8> ExprTemporaries; 261 262 /// ExtVectorDecls - This is a list all the extended vector types. This allows 263 /// us to associate a raw vector type with one of the ext_vector type names. 264 /// This is only necessary for issuing pretty diagnostics. 265 llvm::SmallVector<TypedefNameDecl*, 24> ExtVectorDecls; 266 267 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 268 llvm::OwningPtr<CXXFieldCollector> FieldCollector; 269 270 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 271 272 /// PureVirtualClassDiagSet - a set of class declarations which we have 273 /// emitted a list of pure virtual functions. Used to prevent emitting the 274 /// same list more than once. 275 llvm::OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 276 277 /// ParsingInitForAutoVars - a set of declarations with auto types for which 278 /// we are currently parsing the initializer. 279 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 280 281 /// \brief A mapping from external names to the most recent 282 /// locally-scoped external declaration with that name. 283 /// 284 /// This map contains external declarations introduced in local 285 /// scoped, e.g., 286 /// 287 /// \code 288 /// void f() { 289 /// void foo(int, int); 290 /// } 291 /// \endcode 292 /// 293 /// Here, the name "foo" will be associated with the declaration on 294 /// "foo" within f. This name is not visible outside of 295 /// "f". However, we still find it in two cases: 296 /// 297 /// - If we are declaring another external with the name "foo", we 298 /// can find "foo" as a previous declaration, so that the types 299 /// of this external declaration can be checked for 300 /// compatibility. 301 /// 302 /// - If we would implicitly declare "foo" (e.g., due to a call to 303 /// "foo" in C when no prototype or definition is visible), then 304 /// we find this declaration of "foo" and complain that it is 305 /// not visible. 306 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 307 308 /// \brief All the tentative definitions encountered in the TU. 309 llvm::SmallVector<VarDecl *, 2> TentativeDefinitions; 310 311 /// \brief The set of file scoped decls seen so far that have not been used 312 /// and must warn if not used. Only contains the first declaration. 313 llvm::SmallVector<const DeclaratorDecl*, 4> UnusedFileScopedDecls; 314 315 /// \brief All the delegating constructors seen so far in the file, used for 316 /// cycle detection at the end of the TU. 317 llvm::SmallVector<CXXConstructorDecl*, 4> DelegatingCtorDecls; 318 319 /// \brief All the overriding destructors seen during a class definition 320 /// (there could be multiple due to nested classes) that had their exception 321 /// spec checks delayed, plus the overridden destructor. 322 llvm::SmallVector<std::pair<const CXXDestructorDecl*, 323 const CXXDestructorDecl*>, 2> 324 DelayedDestructorExceptionSpecChecks; 325 326 /// \brief Callback to the parser to parse templated functions when needed. 327 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 328 LateTemplateParserCB *LateTemplateParser; 329 void *OpaqueParser; 330 331 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 332 LateTemplateParser = LTP; 333 OpaqueParser = P; 334 } 335 336 class DelayedDiagnostics; 337 338 class ParsingDeclState { 339 unsigned SavedStackSize; 340 friend class Sema::DelayedDiagnostics; 341 }; 342 343 class ProcessingContextState { 344 unsigned SavedParsingDepth; 345 unsigned SavedActiveStackBase; 346 friend class Sema::DelayedDiagnostics; 347 }; 348 349 /// A class which encapsulates the logic for delaying diagnostics 350 /// during parsing and other processing. 351 class DelayedDiagnostics { 352 /// \brief The stack of diagnostics that were delayed due to being 353 /// produced during the parsing of a declaration. 354 sema::DelayedDiagnostic *Stack; 355 356 /// \brief The number of objects on the delayed-diagnostics stack. 357 unsigned StackSize; 358 359 /// \brief The current capacity of the delayed-diagnostics stack. 360 unsigned StackCapacity; 361 362 /// \brief The index of the first "active" delayed diagnostic in 363 /// the stack. When parsing class definitions, we ignore active 364 /// delayed diagnostics from the surrounding context. 365 unsigned ActiveStackBase; 366 367 /// \brief The depth of the declarations we're currently parsing. 368 /// This gets saved and reset whenever we enter a class definition. 369 unsigned ParsingDepth; 370 371 public: 372 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 373 ActiveStackBase(0), ParsingDepth(0) {} 374 375 ~DelayedDiagnostics() { 376 delete[] reinterpret_cast<char*>(Stack); 377 } 378 379 /// Adds a delayed diagnostic. 380 void add(const sema::DelayedDiagnostic &diag); 381 382 /// Determines whether diagnostics should be delayed. 383 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 384 385 /// Observe that we've started parsing a declaration. Access and 386 /// deprecation diagnostics will be delayed; when the declaration 387 /// is completed, all active delayed diagnostics will be evaluated 388 /// in its context, and then active diagnostics stack will be 389 /// popped down to the saved depth. 390 ParsingDeclState pushParsingDecl() { 391 ParsingDepth++; 392 393 ParsingDeclState state; 394 state.SavedStackSize = StackSize; 395 return state; 396 } 397 398 /// Observe that we're completed parsing a declaration. 399 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 400 401 /// Observe that we've started processing a different context, the 402 /// contents of which are semantically separate from the 403 /// declarations it may lexically appear in. This sets aside the 404 /// current stack of active diagnostics and starts afresh. 405 ProcessingContextState pushContext() { 406 assert(StackSize >= ActiveStackBase); 407 408 ProcessingContextState state; 409 state.SavedParsingDepth = ParsingDepth; 410 state.SavedActiveStackBase = ActiveStackBase; 411 412 ActiveStackBase = StackSize; 413 ParsingDepth = 0; 414 415 return state; 416 } 417 418 /// Observe that we've stopped processing a context. This 419 /// restores the previous stack of active diagnostics. 420 void popContext(ProcessingContextState state) { 421 assert(ActiveStackBase == StackSize); 422 assert(ParsingDepth == 0); 423 ActiveStackBase = state.SavedActiveStackBase; 424 ParsingDepth = state.SavedParsingDepth; 425 } 426 } DelayedDiagnostics; 427 428 /// A RAII object to temporarily push a declaration context. 429 class ContextRAII { 430 private: 431 Sema &S; 432 DeclContext *SavedContext; 433 ProcessingContextState SavedContextState; 434 435 public: 436 ContextRAII(Sema &S, DeclContext *ContextToPush) 437 : S(S), SavedContext(S.CurContext), 438 SavedContextState(S.DelayedDiagnostics.pushContext()) 439 { 440 assert(ContextToPush && "pushing null context"); 441 S.CurContext = ContextToPush; 442 } 443 444 void pop() { 445 if (!SavedContext) return; 446 S.CurContext = SavedContext; 447 S.DelayedDiagnostics.popContext(SavedContextState); 448 SavedContext = 0; 449 } 450 451 ~ContextRAII() { 452 pop(); 453 } 454 }; 455 456 /// WeakUndeclaredIdentifiers - Identifiers contained in 457 /// #pragma weak before declared. rare. may alias another 458 /// identifier, declared or undeclared 459 class WeakInfo { 460 IdentifierInfo *alias; // alias (optional) 461 SourceLocation loc; // for diagnostics 462 bool used; // identifier later declared? 463 public: 464 WeakInfo() 465 : alias(0), loc(SourceLocation()), used(false) {} 466 WeakInfo(IdentifierInfo *Alias, SourceLocation Loc) 467 : alias(Alias), loc(Loc), used(false) {} 468 inline IdentifierInfo * getAlias() const { return alias; } 469 inline SourceLocation getLocation() const { return loc; } 470 void setUsed(bool Used=true) { used = Used; } 471 inline bool getUsed() { return used; } 472 bool operator==(WeakInfo RHS) const { 473 return alias == RHS.getAlias() && loc == RHS.getLocation(); 474 } 475 bool operator!=(WeakInfo RHS) const { return !(*this == RHS); } 476 }; 477 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 478 479 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 480 /// #pragma weak during processing of other Decls. 481 /// I couldn't figure out a clean way to generate these in-line, so 482 /// we store them here and handle separately -- which is a hack. 483 /// It would be best to refactor this. 484 llvm::SmallVector<Decl*,2> WeakTopLevelDecl; 485 486 IdentifierResolver IdResolver; 487 488 /// Translation Unit Scope - useful to Objective-C actions that need 489 /// to lookup file scope declarations in the "ordinary" C decl namespace. 490 /// For example, user-defined classes, built-in "id" type, etc. 491 Scope *TUScope; 492 493 /// \brief The C++ "std" namespace, where the standard library resides. 494 LazyDeclPtr StdNamespace; 495 496 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 497 /// standard library. 498 LazyDeclPtr StdBadAlloc; 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 /// \brief The set of declarations that have been referenced within 511 /// a potentially evaluated expression. 512 typedef llvm::SmallVector<std::pair<SourceLocation, Decl *>, 10> 513 PotentiallyReferencedDecls; 514 515 /// \brief A set of diagnostics that may be emitted. 516 typedef llvm::SmallVector<std::pair<SourceLocation, PartialDiagnostic>, 10> 517 PotentiallyEmittedDiagnostics; 518 519 /// \brief Describes how the expressions currently being parsed are 520 /// evaluated at run-time, if at all. 521 enum ExpressionEvaluationContext { 522 /// \brief The current expression and its subexpressions occur within an 523 /// unevaluated operand (C++0x [expr]p8), such as a constant expression 524 /// or the subexpression of \c sizeof, where the type or the value of the 525 /// expression may be significant but no code will be generated to evaluate 526 /// the value of the expression at run time. 527 Unevaluated, 528 529 /// \brief The current expression is potentially evaluated at run time, 530 /// which means that code may be generated to evaluate the value of the 531 /// expression at run time. 532 PotentiallyEvaluated, 533 534 /// \brief The current expression may be potentially evaluated or it may 535 /// be unevaluated, but it is impossible to tell from the lexical context. 536 /// This evaluation context is used primary for the operand of the C++ 537 /// \c typeid expression, whose argument is potentially evaluated only when 538 /// it is an lvalue of polymorphic class type (C++ [basic.def.odr]p2). 539 PotentiallyPotentiallyEvaluated, 540 541 /// \brief The current expression is potentially evaluated, but any 542 /// declarations referenced inside that expression are only used if 543 /// in fact the current expression is used. 544 /// 545 /// This value is used when parsing default function arguments, for which 546 /// we would like to provide diagnostics (e.g., passing non-POD arguments 547 /// through varargs) but do not want to mark declarations as "referenced" 548 /// until the default argument is used. 549 PotentiallyEvaluatedIfUsed 550 }; 551 552 /// \brief Data structure used to record current or nested 553 /// expression evaluation contexts. 554 struct ExpressionEvaluationContextRecord { 555 /// \brief The expression evaluation context. 556 ExpressionEvaluationContext Context; 557 558 /// \brief The number of temporaries that were active when we 559 /// entered this expression evaluation context. 560 unsigned NumTemporaries; 561 562 /// \brief The set of declarations referenced within a 563 /// potentially potentially-evaluated context. 564 /// 565 /// When leaving a potentially potentially-evaluated context, each 566 /// of these elements will be as referenced if the corresponding 567 /// potentially potentially evaluated expression is potentially 568 /// evaluated. 569 PotentiallyReferencedDecls *PotentiallyReferenced; 570 571 /// \brief The set of diagnostics to emit should this potentially 572 /// potentially-evaluated context become evaluated. 573 PotentiallyEmittedDiagnostics *PotentiallyDiagnosed; 574 575 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 576 unsigned NumTemporaries) 577 : Context(Context), NumTemporaries(NumTemporaries), 578 PotentiallyReferenced(0), PotentiallyDiagnosed(0) { } 579 580 void addReferencedDecl(SourceLocation Loc, Decl *Decl) { 581 if (!PotentiallyReferenced) 582 PotentiallyReferenced = new PotentiallyReferencedDecls; 583 PotentiallyReferenced->push_back(std::make_pair(Loc, Decl)); 584 } 585 586 void addDiagnostic(SourceLocation Loc, const PartialDiagnostic &PD) { 587 if (!PotentiallyDiagnosed) 588 PotentiallyDiagnosed = new PotentiallyEmittedDiagnostics; 589 PotentiallyDiagnosed->push_back(std::make_pair(Loc, PD)); 590 } 591 592 void Destroy() { 593 delete PotentiallyReferenced; 594 delete PotentiallyDiagnosed; 595 PotentiallyReferenced = 0; 596 PotentiallyDiagnosed = 0; 597 } 598 }; 599 600 /// A stack of expression evaluation contexts. 601 llvm::SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 602 603 /// \brief Whether the code handled by Sema should be considered a 604 /// complete translation unit or not. 605 /// 606 /// When true (which is generally the case), Sema will perform 607 /// end-of-translation-unit semantic tasks (such as creating 608 /// initializers for tentative definitions in C) once parsing has 609 /// completed. This flag will be false when building PCH files, 610 /// since a PCH file is by definition not a complete translation 611 /// unit. 612 bool CompleteTranslationUnit; 613 614 llvm::BumpPtrAllocator BumpAlloc; 615 616 /// \brief The number of SFINAE diagnostics that have been trapped. 617 unsigned NumSFINAEErrors; 618 619 typedef llvm::DenseMap<ParmVarDecl *, llvm::SmallVector<ParmVarDecl *, 1> > 620 UnparsedDefaultArgInstantiationsMap; 621 622 /// \brief A mapping from parameters with unparsed default arguments to the 623 /// set of instantiations of each parameter. 624 /// 625 /// This mapping is a temporary data structure used when parsing 626 /// nested class templates or nested classes of class templates, 627 /// where we might end up instantiating an inner class before the 628 /// default arguments of its methods have been parsed. 629 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 630 631 // Contains the locations of the beginning of unparsed default 632 // argument locations. 633 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 634 635 /// UndefinedInternals - all the used, undefined objects with 636 /// internal linkage in this translation unit. 637 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 638 639 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 640 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 641 642 /// Method Pool - allows efficient lookup when typechecking messages to "id". 643 /// We need to maintain a list, since selectors can have differing signatures 644 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 645 /// of selectors are "overloaded"). 646 GlobalMethodPool MethodPool; 647 648 /// Method selectors used in a @selector expression. Used for implementation 649 /// of -Wselector. 650 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 651 652 GlobalMethodPool::iterator ReadMethodPool(Selector Sel); 653 654 /// Private Helper predicate to check for 'self'. 655 bool isSelfExpr(Expr *RExpr); 656public: 657 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 658 bool CompleteTranslationUnit = true, 659 CodeCompleteConsumer *CompletionConsumer = 0); 660 ~Sema(); 661 662 /// \brief Perform initialization that occurs after the parser has been 663 /// initialized but before it parses anything. 664 void Initialize(); 665 666 const LangOptions &getLangOptions() const { return LangOpts; } 667 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 668 FPOptions &getFPOptions() { return FPFeatures; } 669 670 Diagnostic &getDiagnostics() const { return Diags; } 671 SourceManager &getSourceManager() const { return SourceMgr; } 672 const TargetAttributesSema &getTargetAttributesSema() const; 673 Preprocessor &getPreprocessor() const { return PP; } 674 ASTContext &getASTContext() const { return Context; } 675 ASTConsumer &getASTConsumer() const { return Consumer; } 676 ASTMutationListener *getASTMutationListener() const; 677 678 /// \brief Helper class that creates diagnostics with optional 679 /// template instantiation stacks. 680 /// 681 /// This class provides a wrapper around the basic DiagnosticBuilder 682 /// class that emits diagnostics. SemaDiagnosticBuilder is 683 /// responsible for emitting the diagnostic (as DiagnosticBuilder 684 /// does) and, if the diagnostic comes from inside a template 685 /// instantiation, printing the template instantiation stack as 686 /// well. 687 class SemaDiagnosticBuilder : public DiagnosticBuilder { 688 Sema &SemaRef; 689 unsigned DiagID; 690 691 public: 692 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 693 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 694 695 explicit SemaDiagnosticBuilder(Sema &SemaRef) 696 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 697 698 ~SemaDiagnosticBuilder(); 699 }; 700 701 /// \brief Emit a diagnostic. 702 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 703 704 /// \brief Emit a partial diagnostic. 705 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 706 707 /// \brief Build a partial diagnostic. 708 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 709 710 bool findMacroSpelling(SourceLocation &loc, llvm::StringRef name); 711 712 ExprResult Owned(Expr* E) { return E; } 713 ExprResult Owned(ExprResult R) { return R; } 714 StmtResult Owned(Stmt* S) { return S; } 715 716 void ActOnEndOfTranslationUnit(); 717 718 void CheckDelegatingCtorCycles(); 719 720 Scope *getScopeForContext(DeclContext *Ctx); 721 722 void PushFunctionScope(); 723 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 724 void PopFunctionOrBlockScope(const sema::AnalysisBasedWarnings::Policy *WP =0, 725 const Decl *D = 0, const BlockExpr *blkExpr = 0); 726 727 sema::FunctionScopeInfo *getCurFunction() const { 728 return FunctionScopes.back(); 729 } 730 731 bool hasAnyErrorsInThisFunction() const; 732 733 /// \brief Retrieve the current block, if any. 734 sema::BlockScopeInfo *getCurBlock(); 735 736 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 737 llvm::SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 738 739 //===--------------------------------------------------------------------===// 740 // Type Analysis / Processing: SemaType.cpp. 741 // 742 743 QualType adjustParameterType(QualType T); 744 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 745 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 746 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 747 } 748 QualType BuildPointerType(QualType T, 749 SourceLocation Loc, DeclarationName Entity); 750 QualType BuildReferenceType(QualType T, bool LValueRef, 751 SourceLocation Loc, DeclarationName Entity); 752 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 753 Expr *ArraySize, unsigned Quals, 754 SourceRange Brackets, DeclarationName Entity); 755 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 756 SourceLocation AttrLoc); 757 QualType BuildFunctionType(QualType T, 758 QualType *ParamTypes, unsigned NumParamTypes, 759 bool Variadic, unsigned Quals, 760 RefQualifierKind RefQualifier, 761 SourceLocation Loc, DeclarationName Entity, 762 FunctionType::ExtInfo Info); 763 QualType BuildMemberPointerType(QualType T, QualType Class, 764 SourceLocation Loc, 765 DeclarationName Entity); 766 QualType BuildBlockPointerType(QualType T, 767 SourceLocation Loc, DeclarationName Entity); 768 QualType BuildParenType(QualType T); 769 770 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S, 771 TagDecl **OwnedDecl = 0, 772 bool AllowAutoInTypeName = false); 773 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 774 TypeSourceInfo *ReturnTypeInfo); 775 /// \brief Package the given type and TSI into a ParsedType. 776 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 777 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 778 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 779 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 780 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 781 bool CheckDistantExceptionSpec(QualType T); 782 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 783 bool CheckEquivalentExceptionSpec( 784 const FunctionProtoType *Old, SourceLocation OldLoc, 785 const FunctionProtoType *New, SourceLocation NewLoc); 786 bool CheckEquivalentExceptionSpec( 787 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 788 const FunctionProtoType *Old, SourceLocation OldLoc, 789 const FunctionProtoType *New, SourceLocation NewLoc, 790 bool *MissingExceptionSpecification = 0, 791 bool *MissingEmptyExceptionSpecification = 0, 792 bool AllowNoexceptAllMatchWithNoSpec = false, 793 bool IsOperatorNew = false); 794 bool CheckExceptionSpecSubset( 795 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 796 const FunctionProtoType *Superset, SourceLocation SuperLoc, 797 const FunctionProtoType *Subset, SourceLocation SubLoc); 798 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 799 const FunctionProtoType *Target, SourceLocation TargetLoc, 800 const FunctionProtoType *Source, SourceLocation SourceLoc); 801 802 TypeResult ActOnTypeName(Scope *S, Declarator &D); 803 804 bool RequireCompleteType(SourceLocation Loc, QualType T, 805 const PartialDiagnostic &PD, 806 std::pair<SourceLocation, PartialDiagnostic> Note); 807 bool RequireCompleteType(SourceLocation Loc, QualType T, 808 const PartialDiagnostic &PD); 809 bool RequireCompleteType(SourceLocation Loc, QualType T, 810 unsigned DiagID); 811 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 812 std::pair<SourceLocation, 813 PartialDiagnostic> Note); 814 815 816 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 817 const CXXScopeSpec &SS, QualType T); 818 819 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 820 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 821 QualType BuildUnaryTransformType(QualType BaseType, 822 UnaryTransformType::UTTKind UKind, 823 SourceLocation Loc); 824 825 //===--------------------------------------------------------------------===// 826 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 827 // 828 829 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr); 830 831 void DiagnoseUseOfUnimplementedSelectors(); 832 833 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 834 Scope *S, CXXScopeSpec *SS = 0, 835 bool isClassName = false, 836 bool HasTrailingDot = false, 837 ParsedType ObjectType = ParsedType(), 838 bool WantNontrivialTypeSourceInfo = false); 839 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 840 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS); 841 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 842 SourceLocation IILoc, 843 Scope *S, 844 CXXScopeSpec *SS, 845 ParsedType &SuggestedType); 846 847 /// \brief Describes the result of the name lookup and resolution performed 848 /// by \c ClassifyName(). 849 enum NameClassificationKind { 850 NC_Unknown, 851 NC_Error, 852 NC_Keyword, 853 NC_Type, 854 NC_Expression, 855 NC_NestedNameSpecifier, 856 NC_TypeTemplate, 857 NC_FunctionTemplate 858 }; 859 860 class NameClassification { 861 NameClassificationKind Kind; 862 ExprResult Expr; 863 TemplateName Template; 864 ParsedType Type; 865 const IdentifierInfo *Keyword; 866 867 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 868 869 public: 870 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 871 872 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 873 874 NameClassification(const IdentifierInfo *Keyword) 875 : Kind(NC_Keyword), Keyword(Keyword) { } 876 877 static NameClassification Error() { 878 return NameClassification(NC_Error); 879 } 880 881 static NameClassification Unknown() { 882 return NameClassification(NC_Unknown); 883 } 884 885 static NameClassification NestedNameSpecifier() { 886 return NameClassification(NC_NestedNameSpecifier); 887 } 888 889 static NameClassification TypeTemplate(TemplateName Name) { 890 NameClassification Result(NC_TypeTemplate); 891 Result.Template = Name; 892 return Result; 893 } 894 895 static NameClassification FunctionTemplate(TemplateName Name) { 896 NameClassification Result(NC_FunctionTemplate); 897 Result.Template = Name; 898 return Result; 899 } 900 901 NameClassificationKind getKind() const { return Kind; } 902 903 ParsedType getType() const { 904 assert(Kind == NC_Type); 905 return Type; 906 } 907 908 ExprResult getExpression() const { 909 assert(Kind == NC_Expression); 910 return Expr; 911 } 912 913 TemplateName getTemplateName() const { 914 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 915 return Template; 916 } 917 918 TemplateNameKind getTemplateNameKind() const { 919 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 920 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 921 } 922}; 923 924 /// \brief Perform name lookup on the given name, classifying it based on 925 /// the results of name lookup and the following token. 926 /// 927 /// This routine is used by the parser to resolve identifiers and help direct 928 /// parsing. When the identifier cannot be found, this routine will attempt 929 /// to correct the typo and classify based on the resulting name. 930 /// 931 /// \param S The scope in which we're performing name lookup. 932 /// 933 /// \param SS The nested-name-specifier that precedes the name. 934 /// 935 /// \param Name The identifier. If typo correction finds an alternative name, 936 /// this pointer parameter will be updated accordingly. 937 /// 938 /// \param NameLoc The location of the identifier. 939 /// 940 /// \param NextToken The token following the identifier. Used to help 941 /// disambiguate the name. 942 NameClassification ClassifyName(Scope *S, 943 CXXScopeSpec &SS, 944 IdentifierInfo *&Name, 945 SourceLocation NameLoc, 946 const Token &NextToken); 947 948 Decl *ActOnDeclarator(Scope *S, Declarator &D, 949 bool IsFunctionDefintion = false); 950 951 Decl *HandleDeclarator(Scope *S, Declarator &D, 952 MultiTemplateParamsArg TemplateParameterLists, 953 bool IsFunctionDefinition); 954 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 955 const LookupResult &Previous, 956 Scope *S); 957 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 958 void DiagnoseFunctionSpecifiers(Declarator& D); 959 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 960 void CheckShadow(Scope *S, VarDecl *D); 961 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 962 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 963 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 964 QualType R, TypeSourceInfo *TInfo, 965 LookupResult &Previous, bool &Redeclaration); 966 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 967 LookupResult &Previous, bool &Redeclaration); 968 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 969 QualType R, TypeSourceInfo *TInfo, 970 LookupResult &Previous, 971 MultiTemplateParamsArg TemplateParamLists, 972 bool &Redeclaration); 973 void CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous, 974 bool &Redeclaration); 975 void CheckCompleteVariableDeclaration(VarDecl *var); 976 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 977 QualType R, TypeSourceInfo *TInfo, 978 LookupResult &Previous, 979 MultiTemplateParamsArg TemplateParamLists, 980 bool IsFunctionDefinition, 981 bool &Redeclaration); 982 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 983 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 984 void CheckFunctionDeclaration(Scope *S, 985 FunctionDecl *NewFD, LookupResult &Previous, 986 bool IsExplicitSpecialization, 987 bool &Redeclaration); 988 void CheckMain(FunctionDecl *FD); 989 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 990 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 991 SourceLocation Loc, 992 QualType T); 993 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 994 SourceLocation NameLoc, IdentifierInfo *Name, 995 QualType T, TypeSourceInfo *TSInfo, 996 StorageClass SC, StorageClass SCAsWritten); 997 void ActOnParamDefaultArgument(Decl *param, 998 SourceLocation EqualLoc, 999 Expr *defarg); 1000 void ActOnParamUnparsedDefaultArgument(Decl *param, 1001 SourceLocation EqualLoc, 1002 SourceLocation ArgLoc); 1003 void ActOnParamDefaultArgumentError(Decl *param); 1004 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1005 SourceLocation EqualLoc); 1006 1007 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1008 bool TypeMayContainAuto); 1009 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1010 void ActOnInitializerError(Decl *Dcl); 1011 void ActOnCXXForRangeDecl(Decl *D); 1012 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1013 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1014 void FinalizeDeclaration(Decl *D); 1015 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1016 Decl **Group, 1017 unsigned NumDecls); 1018 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1019 bool TypeMayContainAuto = true); 1020 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1021 SourceLocation LocAfterDecls); 1022 void CheckForFunctionRedefinition(FunctionDecl *FD); 1023 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1024 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1025 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1026 1027 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1028 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1029 1030 /// \brief Diagnose any unused parameters in the given sequence of 1031 /// ParmVarDecl pointers. 1032 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1033 ParmVarDecl * const *End); 1034 1035 /// \brief Diagnose whether the size of parameters or return value of a 1036 /// function or obj-c method definition is pass-by-value and larger than a 1037 /// specified threshold. 1038 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1039 ParmVarDecl * const *End, 1040 QualType ReturnTy, 1041 NamedDecl *D); 1042 1043 void DiagnoseInvalidJumps(Stmt *Body); 1044 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1045 SourceLocation AsmLoc, 1046 SourceLocation RParenLoc); 1047 1048 /// Scope actions. 1049 void ActOnPopScope(SourceLocation Loc, Scope *S); 1050 void ActOnTranslationUnitScope(Scope *S); 1051 1052 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1053 DeclSpec &DS); 1054 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1055 DeclSpec &DS, 1056 MultiTemplateParamsArg TemplateParams); 1057 1058 StmtResult ActOnVlaStmt(const DeclSpec &DS); 1059 1060 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1061 AccessSpecifier AS, 1062 RecordDecl *Record); 1063 1064 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1065 RecordDecl *Record); 1066 1067 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1068 TagTypeKind NewTag, 1069 SourceLocation NewTagLoc, 1070 const IdentifierInfo &Name); 1071 1072 enum TagUseKind { 1073 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1074 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1075 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1076 TUK_Friend // Friend declaration: 'friend struct foo;' 1077 }; 1078 1079 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1080 SourceLocation KWLoc, CXXScopeSpec &SS, 1081 IdentifierInfo *Name, SourceLocation NameLoc, 1082 AttributeList *Attr, AccessSpecifier AS, 1083 MultiTemplateParamsArg TemplateParameterLists, 1084 bool &OwnedDecl, bool &IsDependent, bool ScopedEnum, 1085 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1086 1087 void InjectMicrosoftFriendForwardDeclaration(unsigned TagSpec, 1088 SourceLocation KWLoc, 1089 IdentifierInfo *Name, 1090 SourceLocation NameLoc); 1091 1092 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1093 unsigned TagSpec, SourceLocation TagLoc, 1094 CXXScopeSpec &SS, 1095 IdentifierInfo *Name, SourceLocation NameLoc, 1096 AttributeList *Attr, 1097 MultiTemplateParamsArg TempParamLists); 1098 1099 TypeResult ActOnDependentTag(Scope *S, 1100 unsigned TagSpec, 1101 TagUseKind TUK, 1102 const CXXScopeSpec &SS, 1103 IdentifierInfo *Name, 1104 SourceLocation TagLoc, 1105 SourceLocation NameLoc); 1106 1107 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1108 IdentifierInfo *ClassName, 1109 llvm::SmallVectorImpl<Decl *> &Decls); 1110 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1111 Declarator &D, Expr *BitfieldWidth); 1112 1113 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1114 Declarator &D, Expr *BitfieldWidth, 1115 AccessSpecifier AS); 1116 1117 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1118 TypeSourceInfo *TInfo, 1119 RecordDecl *Record, SourceLocation Loc, 1120 bool Mutable, Expr *BitfieldWidth, 1121 SourceLocation TSSL, 1122 AccessSpecifier AS, NamedDecl *PrevDecl, 1123 Declarator *D = 0); 1124 1125 enum CXXSpecialMember { 1126 CXXDefaultConstructor, 1127 CXXCopyConstructor, 1128 CXXMoveConstructor, 1129 CXXCopyAssignment, 1130 CXXMoveAssignment, 1131 CXXDestructor, 1132 CXXInvalid 1133 }; 1134 bool CheckNontrivialField(FieldDecl *FD); 1135 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1136 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1137 void ActOnLastBitfield(SourceLocation DeclStart, Decl *IntfDecl, 1138 llvm::SmallVectorImpl<Decl *> &AllIvarDecls); 1139 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, Decl *IntfDecl, 1140 Declarator &D, Expr *BitfieldWidth, 1141 tok::ObjCKeywordKind visibility); 1142 1143 // This is used for both record definitions and ObjC interface declarations. 1144 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1145 Decl **Fields, unsigned NumFields, 1146 SourceLocation LBrac, SourceLocation RBrac, 1147 AttributeList *AttrList); 1148 1149 /// ActOnTagStartDefinition - Invoked when we have entered the 1150 /// scope of a tag's definition (e.g., for an enumeration, class, 1151 /// struct, or union). 1152 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1153 1154 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1155 /// C++ record definition's base-specifiers clause and are starting its 1156 /// member declarations. 1157 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1158 SourceLocation FinalLoc, 1159 SourceLocation LBraceLoc); 1160 1161 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1162 /// the definition of a tag (enumeration, class, struct, or union). 1163 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1164 SourceLocation RBraceLoc); 1165 1166 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1167 /// error parsing the definition of a tag. 1168 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1169 1170 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1171 EnumConstantDecl *LastEnumConst, 1172 SourceLocation IdLoc, 1173 IdentifierInfo *Id, 1174 Expr *val); 1175 1176 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1177 SourceLocation IdLoc, IdentifierInfo *Id, 1178 AttributeList *Attrs, 1179 SourceLocation EqualLoc, Expr *Val); 1180 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1181 SourceLocation RBraceLoc, Decl *EnumDecl, 1182 Decl **Elements, unsigned NumElements, 1183 Scope *S, AttributeList *Attr); 1184 1185 DeclContext *getContainingDC(DeclContext *DC); 1186 1187 /// Set the current declaration context until it gets popped. 1188 void PushDeclContext(Scope *S, DeclContext *DC); 1189 void PopDeclContext(); 1190 1191 /// EnterDeclaratorContext - Used when we must lookup names in the context 1192 /// of a declarator's nested name specifier. 1193 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1194 void ExitDeclaratorContext(Scope *S); 1195 1196 DeclContext *getFunctionLevelDeclContext(); 1197 1198 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1199 /// to the function decl for the function being parsed. If we're currently 1200 /// in a 'block', this returns the containing context. 1201 FunctionDecl *getCurFunctionDecl(); 1202 1203 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1204 /// the method decl for the method being parsed. If we're currently 1205 /// in a 'block', this returns the containing context. 1206 ObjCMethodDecl *getCurMethodDecl(); 1207 1208 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1209 /// or C function we're in, otherwise return null. If we're currently 1210 /// in a 'block', this returns the containing context. 1211 NamedDecl *getCurFunctionOrMethodDecl(); 1212 1213 /// Add this decl to the scope shadowed decl chains. 1214 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1215 1216 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1217 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1218 /// true if 'D' belongs to the given declaration context. 1219 /// 1220 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1221 /// whether the declaration is in scope for the purposes of explicit template 1222 /// instantiation or specialization. The default is false. 1223 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1224 bool ExplicitInstantiationOrSpecialization = false); 1225 1226 /// Finds the scope corresponding to the given decl context, if it 1227 /// happens to be an enclosing scope. Otherwise return NULL. 1228 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1229 1230 /// Subroutines of ActOnDeclarator(). 1231 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1232 TypeSourceInfo *TInfo); 1233 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1234 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1235 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1236 void mergeObjCMethodDecls(ObjCMethodDecl *New, const ObjCMethodDecl *Old); 1237 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1238 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1239 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1240 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1241 1242 // AssignmentAction - This is used by all the assignment diagnostic functions 1243 // to represent what is actually causing the operation 1244 enum AssignmentAction { 1245 AA_Assigning, 1246 AA_Passing, 1247 AA_Returning, 1248 AA_Converting, 1249 AA_Initializing, 1250 AA_Sending, 1251 AA_Casting 1252 }; 1253 1254 /// C++ Overloading. 1255 enum OverloadKind { 1256 /// This is a legitimate overload: the existing declarations are 1257 /// functions or function templates with different signatures. 1258 Ovl_Overload, 1259 1260 /// This is not an overload because the signature exactly matches 1261 /// an existing declaration. 1262 Ovl_Match, 1263 1264 /// This is not an overload because the lookup results contain a 1265 /// non-function. 1266 Ovl_NonFunction 1267 }; 1268 OverloadKind CheckOverload(Scope *S, 1269 FunctionDecl *New, 1270 const LookupResult &OldDecls, 1271 NamedDecl *&OldDecl, 1272 bool IsForUsingDecl); 1273 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1274 1275 bool TryImplicitConversion(InitializationSequence &Sequence, 1276 const InitializedEntity &Entity, 1277 Expr *From, 1278 bool SuppressUserConversions, 1279 bool AllowExplicit, 1280 bool InOverloadResolution, 1281 bool CStyle); 1282 1283 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1284 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1285 bool IsComplexPromotion(QualType FromType, QualType ToType); 1286 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1287 bool InOverloadResolution, 1288 QualType& ConvertedType, bool &IncompatibleObjC); 1289 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1290 QualType& ConvertedType, bool &IncompatibleObjC); 1291 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1292 QualType& ConvertedType); 1293 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1294 const FunctionProtoType *NewType); 1295 1296 bool CheckPointerConversion(Expr *From, QualType ToType, 1297 CastKind &Kind, 1298 CXXCastPath& BasePath, 1299 bool IgnoreBaseAccess); 1300 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1301 bool InOverloadResolution, 1302 QualType &ConvertedType); 1303 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1304 CastKind &Kind, 1305 CXXCastPath &BasePath, 1306 bool IgnoreBaseAccess); 1307 bool IsQualificationConversion(QualType FromType, QualType ToType, 1308 bool CStyle); 1309 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1310 1311 1312 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1313 const VarDecl *NRVOCandidate, 1314 QualType ResultType, 1315 Expr *Value); 1316 1317 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1318 ExprResult Init); 1319 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1320 SourceLocation EqualLoc, 1321 ExprResult Init); 1322 ExprResult PerformObjectArgumentInitialization(Expr *From, 1323 NestedNameSpecifier *Qualifier, 1324 NamedDecl *FoundDecl, 1325 CXXMethodDecl *Method); 1326 1327 ExprResult PerformContextuallyConvertToBool(Expr *From); 1328 ExprResult PerformContextuallyConvertToObjCId(Expr *From); 1329 1330 ExprResult 1331 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1332 const PartialDiagnostic &NotIntDiag, 1333 const PartialDiagnostic &IncompleteDiag, 1334 const PartialDiagnostic &ExplicitConvDiag, 1335 const PartialDiagnostic &ExplicitConvNote, 1336 const PartialDiagnostic &AmbigDiag, 1337 const PartialDiagnostic &AmbigNote, 1338 const PartialDiagnostic &ConvDiag); 1339 1340 ExprResult PerformObjectMemberConversion(Expr *From, 1341 NestedNameSpecifier *Qualifier, 1342 NamedDecl *FoundDecl, 1343 NamedDecl *Member); 1344 1345 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1346 // TODO: make this is a typesafe union. 1347 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1348 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1349 1350 void AddOverloadCandidate(NamedDecl *Function, 1351 DeclAccessPair FoundDecl, 1352 Expr **Args, unsigned NumArgs, 1353 OverloadCandidateSet &CandidateSet); 1354 1355 void AddOverloadCandidate(FunctionDecl *Function, 1356 DeclAccessPair FoundDecl, 1357 Expr **Args, unsigned NumArgs, 1358 OverloadCandidateSet& CandidateSet, 1359 bool SuppressUserConversions = false, 1360 bool PartialOverloading = false); 1361 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1362 Expr **Args, unsigned NumArgs, 1363 OverloadCandidateSet& CandidateSet, 1364 bool SuppressUserConversions = false); 1365 void AddMethodCandidate(DeclAccessPair FoundDecl, 1366 QualType ObjectType, 1367 Expr::Classification ObjectClassification, 1368 Expr **Args, unsigned NumArgs, 1369 OverloadCandidateSet& CandidateSet, 1370 bool SuppressUserConversion = false); 1371 void AddMethodCandidate(CXXMethodDecl *Method, 1372 DeclAccessPair FoundDecl, 1373 CXXRecordDecl *ActingContext, QualType ObjectType, 1374 Expr::Classification ObjectClassification, 1375 Expr **Args, unsigned NumArgs, 1376 OverloadCandidateSet& CandidateSet, 1377 bool SuppressUserConversions = false); 1378 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1379 DeclAccessPair FoundDecl, 1380 CXXRecordDecl *ActingContext, 1381 TemplateArgumentListInfo *ExplicitTemplateArgs, 1382 QualType ObjectType, 1383 Expr::Classification ObjectClassification, 1384 Expr **Args, unsigned NumArgs, 1385 OverloadCandidateSet& CandidateSet, 1386 bool SuppressUserConversions = false); 1387 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1388 DeclAccessPair FoundDecl, 1389 TemplateArgumentListInfo *ExplicitTemplateArgs, 1390 Expr **Args, unsigned NumArgs, 1391 OverloadCandidateSet& CandidateSet, 1392 bool SuppressUserConversions = false); 1393 void AddConversionCandidate(CXXConversionDecl *Conversion, 1394 DeclAccessPair FoundDecl, 1395 CXXRecordDecl *ActingContext, 1396 Expr *From, QualType ToType, 1397 OverloadCandidateSet& CandidateSet); 1398 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1399 DeclAccessPair FoundDecl, 1400 CXXRecordDecl *ActingContext, 1401 Expr *From, QualType ToType, 1402 OverloadCandidateSet &CandidateSet); 1403 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1404 DeclAccessPair FoundDecl, 1405 CXXRecordDecl *ActingContext, 1406 const FunctionProtoType *Proto, 1407 Expr *Object, Expr **Args, unsigned NumArgs, 1408 OverloadCandidateSet& CandidateSet); 1409 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1410 SourceLocation OpLoc, 1411 Expr **Args, unsigned NumArgs, 1412 OverloadCandidateSet& CandidateSet, 1413 SourceRange OpRange = SourceRange()); 1414 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1415 Expr **Args, unsigned NumArgs, 1416 OverloadCandidateSet& CandidateSet, 1417 bool IsAssignmentOperator = false, 1418 unsigned NumContextualBoolArguments = 0); 1419 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1420 SourceLocation OpLoc, 1421 Expr **Args, unsigned NumArgs, 1422 OverloadCandidateSet& CandidateSet); 1423 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1424 bool Operator, 1425 Expr **Args, unsigned NumArgs, 1426 TemplateArgumentListInfo *ExplicitTemplateArgs, 1427 OverloadCandidateSet& CandidateSet, 1428 bool PartialOverloading = false, 1429 bool StdNamespaceIsAssociated = false); 1430 1431 // Emit as a 'note' the specific overload candidate 1432 void NoteOverloadCandidate(FunctionDecl *Fn); 1433 1434 // Emit as a series of 'note's all template and non-templates 1435 // identified by the expression Expr 1436 void NoteAllOverloadCandidates(Expr* E); 1437 1438 // [PossiblyAFunctionType] --> [Return] 1439 // NonFunctionType --> NonFunctionType 1440 // R (A) --> R(A) 1441 // R (*)(A) --> R (A) 1442 // R (&)(A) --> R (A) 1443 // R (S::*)(A) --> R (A) 1444 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1445 1446 FunctionDecl *ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, QualType TargetType, 1447 bool Complain, 1448 DeclAccessPair &Found); 1449 1450 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1451 bool Complain = false, 1452 DeclAccessPair* Found = 0); 1453 1454 ExprResult ResolveAndFixSingleFunctionTemplateSpecialization( 1455 Expr *SrcExpr, bool DoFunctionPointerConverion = false, 1456 bool Complain = false, 1457 const SourceRange& OpRangeForComplaining = SourceRange(), 1458 QualType DestTypeForComplaining = QualType(), 1459 unsigned DiagIDForComplaining = 0); 1460 1461 1462 Expr *FixOverloadedFunctionReference(Expr *E, 1463 DeclAccessPair FoundDecl, 1464 FunctionDecl *Fn); 1465 ExprResult FixOverloadedFunctionReference(ExprResult, 1466 DeclAccessPair FoundDecl, 1467 FunctionDecl *Fn); 1468 1469 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1470 Expr **Args, unsigned NumArgs, 1471 OverloadCandidateSet &CandidateSet, 1472 bool PartialOverloading = false); 1473 1474 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1475 UnresolvedLookupExpr *ULE, 1476 SourceLocation LParenLoc, 1477 Expr **Args, unsigned NumArgs, 1478 SourceLocation RParenLoc, 1479 Expr *ExecConfig); 1480 1481 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1482 unsigned Opc, 1483 const UnresolvedSetImpl &Fns, 1484 Expr *input); 1485 1486 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1487 unsigned Opc, 1488 const UnresolvedSetImpl &Fns, 1489 Expr *LHS, Expr *RHS); 1490 1491 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1492 SourceLocation RLoc, 1493 Expr *Base,Expr *Idx); 1494 1495 ExprResult 1496 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1497 SourceLocation LParenLoc, Expr **Args, 1498 unsigned NumArgs, SourceLocation RParenLoc); 1499 ExprResult 1500 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1501 Expr **Args, unsigned NumArgs, 1502 SourceLocation RParenLoc); 1503 1504 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1505 SourceLocation OpLoc); 1506 1507 /// CheckCallReturnType - Checks that a call expression's return type is 1508 /// complete. Returns true on failure. The location passed in is the location 1509 /// that best represents the call. 1510 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1511 CallExpr *CE, FunctionDecl *FD); 1512 1513 /// Helpers for dealing with blocks and functions. 1514 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1515 bool CheckParameterNames); 1516 void CheckCXXDefaultArguments(FunctionDecl *FD); 1517 void CheckExtraCXXDefaultArguments(Declarator &D); 1518 Scope *getNonFieldDeclScope(Scope *S); 1519 1520 /// \name Name lookup 1521 /// 1522 /// These routines provide name lookup that is used during semantic 1523 /// analysis to resolve the various kinds of names (identifiers, 1524 /// overloaded operator names, constructor names, etc.) into zero or 1525 /// more declarations within a particular scope. The major entry 1526 /// points are LookupName, which performs unqualified name lookup, 1527 /// and LookupQualifiedName, which performs qualified name lookup. 1528 /// 1529 /// All name lookup is performed based on some specific criteria, 1530 /// which specify what names will be visible to name lookup and how 1531 /// far name lookup should work. These criteria are important both 1532 /// for capturing language semantics (certain lookups will ignore 1533 /// certain names, for example) and for performance, since name 1534 /// lookup is often a bottleneck in the compilation of C++. Name 1535 /// lookup criteria is specified via the LookupCriteria enumeration. 1536 /// 1537 /// The results of name lookup can vary based on the kind of name 1538 /// lookup performed, the current language, and the translation 1539 /// unit. In C, for example, name lookup will either return nothing 1540 /// (no entity found) or a single declaration. In C++, name lookup 1541 /// can additionally refer to a set of overloaded functions or 1542 /// result in an ambiguity. All of the possible results of name 1543 /// lookup are captured by the LookupResult class, which provides 1544 /// the ability to distinguish among them. 1545 //@{ 1546 1547 /// @brief Describes the kind of name lookup to perform. 1548 enum LookupNameKind { 1549 /// Ordinary name lookup, which finds ordinary names (functions, 1550 /// variables, typedefs, etc.) in C and most kinds of names 1551 /// (functions, variables, members, types, etc.) in C++. 1552 LookupOrdinaryName = 0, 1553 /// Tag name lookup, which finds the names of enums, classes, 1554 /// structs, and unions. 1555 LookupTagName, 1556 /// Label name lookup. 1557 LookupLabel, 1558 /// Member name lookup, which finds the names of 1559 /// class/struct/union members. 1560 LookupMemberName, 1561 /// Look up of an operator name (e.g., operator+) for use with 1562 /// operator overloading. This lookup is similar to ordinary name 1563 /// lookup, but will ignore any declarations that are class members. 1564 LookupOperatorName, 1565 /// Look up of a name that precedes the '::' scope resolution 1566 /// operator in C++. This lookup completely ignores operator, object, 1567 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1568 LookupNestedNameSpecifierName, 1569 /// Look up a namespace name within a C++ using directive or 1570 /// namespace alias definition, ignoring non-namespace names (C++ 1571 /// [basic.lookup.udir]p1). 1572 LookupNamespaceName, 1573 /// Look up all declarations in a scope with the given name, 1574 /// including resolved using declarations. This is appropriate 1575 /// for checking redeclarations for a using declaration. 1576 LookupUsingDeclName, 1577 /// Look up an ordinary name that is going to be redeclared as a 1578 /// name with linkage. This lookup ignores any declarations that 1579 /// are outside of the current scope unless they have linkage. See 1580 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1581 LookupRedeclarationWithLinkage, 1582 /// Look up the name of an Objective-C protocol. 1583 LookupObjCProtocolName, 1584 /// \brief Look up any declaration with any name. 1585 LookupAnyName 1586 }; 1587 1588 /// \brief Specifies whether (or how) name lookup is being performed for a 1589 /// redeclaration (vs. a reference). 1590 enum RedeclarationKind { 1591 /// \brief The lookup is a reference to this name that is not for the 1592 /// purpose of redeclaring the name. 1593 NotForRedeclaration = 0, 1594 /// \brief The lookup results will be used for redeclaration of a name, 1595 /// if an entity by that name already exists. 1596 ForRedeclaration 1597 }; 1598 1599private: 1600 bool CppLookupName(LookupResult &R, Scope *S); 1601 1602public: 1603 /// \brief Look up a name, looking for a single declaration. Return 1604 /// null if the results were absent, ambiguous, or overloaded. 1605 /// 1606 /// It is preferable to use the elaborated form and explicitly handle 1607 /// ambiguity and overloaded. 1608 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1609 SourceLocation Loc, 1610 LookupNameKind NameKind, 1611 RedeclarationKind Redecl 1612 = NotForRedeclaration); 1613 bool LookupName(LookupResult &R, Scope *S, 1614 bool AllowBuiltinCreation = false); 1615 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1616 bool InUnqualifiedLookup = false); 1617 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1618 bool AllowBuiltinCreation = false, 1619 bool EnteringContext = false); 1620 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1621 1622 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1623 QualType T1, QualType T2, 1624 UnresolvedSetImpl &Functions); 1625 1626 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1627 SourceLocation GnuLabelLoc = SourceLocation()); 1628 1629 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1630 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1631 1632 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1633 Expr **Args, unsigned NumArgs, 1634 ADLResult &Functions, 1635 bool StdNamespaceIsAssociated = false); 1636 1637 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1638 VisibleDeclConsumer &Consumer, 1639 bool IncludeGlobalScope = true); 1640 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1641 VisibleDeclConsumer &Consumer, 1642 bool IncludeGlobalScope = true); 1643 1644 /// \brief The context in which typo-correction occurs. 1645 /// 1646 /// The typo-correction context affects which keywords (if any) are 1647 /// considered when trying to correct for typos. 1648 enum CorrectTypoContext { 1649 /// \brief An unknown context, where any keyword might be valid. 1650 CTC_Unknown, 1651 /// \brief A context where no keywords are used (e.g. we expect an actual 1652 /// name). 1653 CTC_NoKeywords, 1654 /// \brief A context where we're correcting a type name. 1655 CTC_Type, 1656 /// \brief An expression context. 1657 CTC_Expression, 1658 /// \brief A type cast, or anything else that can be followed by a '<'. 1659 CTC_CXXCasts, 1660 /// \brief A member lookup context. 1661 CTC_MemberLookup, 1662 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1663 CTC_ObjCIvarLookup, 1664 /// \brief An Objective-C property lookup context (e.g., self.prop). 1665 CTC_ObjCPropertyLookup, 1666 /// \brief The receiver of an Objective-C message send within an 1667 /// Objective-C method where 'super' is a valid keyword. 1668 CTC_ObjCMessageReceiver 1669 }; 1670 1671 DeclarationName CorrectTypo(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1672 DeclContext *MemberContext = 0, 1673 bool EnteringContext = false, 1674 CorrectTypoContext CTC = CTC_Unknown, 1675 const ObjCObjectPointerType *OPT = 0); 1676 1677 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1678 AssociatedNamespaceSet &AssociatedNamespaces, 1679 AssociatedClassSet &AssociatedClasses); 1680 1681 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1682 bool ConsiderLinkage, 1683 bool ExplicitInstantiationOrSpecialization); 1684 1685 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1686 //@} 1687 1688 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1689 SourceLocation IdLoc, 1690 bool TypoCorrection = false); 1691 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1692 Scope *S, bool ForRedeclaration, 1693 SourceLocation Loc); 1694 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1695 Scope *S); 1696 void AddKnownFunctionAttributes(FunctionDecl *FD); 1697 1698 // More parsing and symbol table subroutines. 1699 1700 // Decl attributes - this routine is the top level dispatcher. 1701 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1702 bool NonInheritable = true, bool Inheritable = true); 1703 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1704 bool NonInheritable = true, bool Inheritable = true); 1705 1706 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1707 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1708 bool CheckNoReturnAttr(const AttributeList &attr); 1709 1710 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1711 bool &IncompleteImpl, unsigned DiagID); 1712 void WarnConflictingTypedMethods(ObjCMethodDecl *ImpMethod, 1713 ObjCMethodDecl *MethodDecl, 1714 bool IsProtocolMethodDecl); 1715 1716 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1717 ObjCInterfaceDecl *IDecl); 1718 1719 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1720 1721 /// CheckProtocolMethodDefs - This routine checks unimplemented 1722 /// methods declared in protocol, and those referenced by it. 1723 /// \param IDecl - Used for checking for methods which may have been 1724 /// inherited. 1725 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1726 ObjCProtocolDecl *PDecl, 1727 bool& IncompleteImpl, 1728 const SelectorSet &InsMap, 1729 const SelectorSet &ClsMap, 1730 ObjCContainerDecl *CDecl); 1731 1732 /// CheckImplementationIvars - This routine checks if the instance variables 1733 /// listed in the implelementation match those listed in the interface. 1734 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1735 ObjCIvarDecl **Fields, unsigned nIvars, 1736 SourceLocation Loc); 1737 1738 /// \brief Determine whether we can synthesize a provisional ivar for the 1739 /// given name. 1740 ObjCPropertyDecl *canSynthesizeProvisionalIvar(IdentifierInfo *II); 1741 1742 /// \brief Determine whether we can synthesize a provisional ivar for the 1743 /// given property. 1744 bool canSynthesizeProvisionalIvar(ObjCPropertyDecl *Property); 1745 1746 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1747 /// remains unimplemented in the class or category @implementation. 1748 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1749 ObjCContainerDecl* IDecl, 1750 bool IncompleteImpl = false); 1751 1752 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1753 /// which must be implemented by this implementation. 1754 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1755 ObjCContainerDecl *CDecl, 1756 const SelectorSet &InsMap); 1757 1758 /// DefaultSynthesizeProperties - This routine default synthesizes all 1759 /// properties which must be synthesized in class's @implementation. 1760 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1761 ObjCInterfaceDecl *IDecl); 1762 1763 /// CollectImmediateProperties - This routine collects all properties in 1764 /// the class and its conforming protocols; but not those it its super class. 1765 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1766 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1767 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1768 1769 1770 /// LookupPropertyDecl - Looks up a property in the current class and all 1771 /// its protocols. 1772 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1773 IdentifierInfo *II); 1774 1775 /// Called by ActOnProperty to handle @property declarations in 1776 //// class extensions. 1777 Decl *HandlePropertyInClassExtension(Scope *S, 1778 ObjCCategoryDecl *CDecl, 1779 SourceLocation AtLoc, 1780 FieldDeclarator &FD, 1781 Selector GetterSel, 1782 Selector SetterSel, 1783 const bool isAssign, 1784 const bool isReadWrite, 1785 const unsigned Attributes, 1786 bool *isOverridingProperty, 1787 TypeSourceInfo *T, 1788 tok::ObjCKeywordKind MethodImplKind); 1789 1790 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1791 /// handle creating the ObjcPropertyDecl for a category or @interface. 1792 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1793 ObjCContainerDecl *CDecl, 1794 SourceLocation AtLoc, 1795 FieldDeclarator &FD, 1796 Selector GetterSel, 1797 Selector SetterSel, 1798 const bool isAssign, 1799 const bool isReadWrite, 1800 const unsigned Attributes, 1801 TypeSourceInfo *T, 1802 tok::ObjCKeywordKind MethodImplKind, 1803 DeclContext *lexicalDC = 0); 1804 1805 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1806 /// warning) when atomic property has one but not the other user-declared 1807 /// setter or getter. 1808 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1809 ObjCContainerDecl* IDecl); 1810 1811 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1812 1813 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1814 /// true, or false, accordingly. 1815 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1816 const ObjCMethodDecl *PrevMethod, 1817 bool matchBasedOnSizeAndAlignment = false, 1818 bool matchBasedOnStrictEqulity = false); 1819 1820 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1821 /// or protocol against those declared in their implementations. 1822 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1823 const SelectorSet &ClsMap, 1824 SelectorSet &InsMapSeen, 1825 SelectorSet &ClsMapSeen, 1826 ObjCImplDecl* IMPDecl, 1827 ObjCContainerDecl* IDecl, 1828 bool &IncompleteImpl, 1829 bool ImmediateClass); 1830 1831private: 1832 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1833 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1834 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1835 1836 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1837 /// optionally warns if there are multiple signatures. 1838 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1839 bool receiverIdOrClass, 1840 bool warn, bool instance); 1841 1842public: 1843 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1844 /// unit are added to a global pool. This allows us to efficiently associate 1845 /// a selector with a method declaraation for purposes of typechecking 1846 /// messages sent to "id" (where the class of the object is unknown). 1847 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1848 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1849 } 1850 1851 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1852 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1853 AddMethodToGlobalPool(Method, impl, /*instance*/false); 1854 } 1855 1856 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 1857 /// there are multiple signatures. 1858 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 1859 bool receiverIdOrClass=false, 1860 bool warn=true) { 1861 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1862 warn, /*instance*/true); 1863 } 1864 1865 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 1866 /// there are multiple signatures. 1867 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 1868 bool receiverIdOrClass=false, 1869 bool warn=true) { 1870 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1871 warn, /*instance*/false); 1872 } 1873 1874 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 1875 /// implementation. 1876 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 1877 1878 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 1879 /// initialization. 1880 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 1881 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 1882 1883 //===--------------------------------------------------------------------===// 1884 // Statement Parsing Callbacks: SemaStmt.cpp. 1885public: 1886 class FullExprArg { 1887 public: 1888 FullExprArg(Sema &actions) : E(0) { } 1889 1890 // FIXME: The const_cast here is ugly. RValue references would make this 1891 // much nicer (or we could duplicate a bunch of the move semantics 1892 // emulation code from Ownership.h). 1893 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 1894 1895 ExprResult release() { 1896 return move(E); 1897 } 1898 1899 Expr *get() const { return E; } 1900 1901 Expr *operator->() { 1902 return E; 1903 } 1904 1905 private: 1906 // FIXME: No need to make the entire Sema class a friend when it's just 1907 // Sema::MakeFullExpr that needs access to the constructor below. 1908 friend class Sema; 1909 1910 explicit FullExprArg(Expr *expr) : E(expr) {} 1911 1912 Expr *E; 1913 }; 1914 1915 FullExprArg MakeFullExpr(Expr *Arg) { 1916 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 1917 } 1918 1919 StmtResult ActOnExprStmt(FullExprArg Expr); 1920 1921 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 1922 SourceLocation LeadingEmptyMacroLoc = SourceLocation()); 1923 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 1924 MultiStmtArg Elts, 1925 bool isStmtExpr); 1926 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 1927 SourceLocation StartLoc, 1928 SourceLocation EndLoc); 1929 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 1930 StmtResult ActOnForEachLValueExpr(Expr *E); 1931 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 1932 SourceLocation DotDotDotLoc, Expr *RHSVal, 1933 SourceLocation ColonLoc); 1934 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 1935 1936 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 1937 SourceLocation ColonLoc, 1938 Stmt *SubStmt, Scope *CurScope); 1939 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 1940 SourceLocation ColonLoc, Stmt *SubStmt); 1941 1942 StmtResult ActOnIfStmt(SourceLocation IfLoc, 1943 FullExprArg CondVal, Decl *CondVar, 1944 Stmt *ThenVal, 1945 SourceLocation ElseLoc, Stmt *ElseVal); 1946 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 1947 Expr *Cond, 1948 Decl *CondVar); 1949 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 1950 Stmt *Switch, Stmt *Body); 1951 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 1952 FullExprArg Cond, 1953 Decl *CondVar, Stmt *Body); 1954 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 1955 SourceLocation WhileLoc, 1956 SourceLocation CondLParen, Expr *Cond, 1957 SourceLocation CondRParen); 1958 1959 StmtResult ActOnForStmt(SourceLocation ForLoc, 1960 SourceLocation LParenLoc, 1961 Stmt *First, FullExprArg Second, 1962 Decl *SecondVar, 1963 FullExprArg Third, 1964 SourceLocation RParenLoc, 1965 Stmt *Body); 1966 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 1967 SourceLocation LParenLoc, 1968 Stmt *First, Expr *Second, 1969 SourceLocation RParenLoc, Stmt *Body); 1970 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 1971 SourceLocation LParenLoc, Stmt *LoopVar, 1972 SourceLocation ColonLoc, Expr *Collection, 1973 SourceLocation RParenLoc); 1974 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 1975 SourceLocation ColonLoc, 1976 Stmt *RangeDecl, Stmt *BeginEndDecl, 1977 Expr *Cond, Expr *Inc, 1978 Stmt *LoopVarDecl, 1979 SourceLocation RParenLoc); 1980 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 1981 1982 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 1983 SourceLocation LabelLoc, 1984 LabelDecl *TheDecl); 1985 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 1986 SourceLocation StarLoc, 1987 Expr *DestExp); 1988 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 1989 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 1990 1991 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 1992 bool AllowFunctionParameters); 1993 1994 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 1995 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 1996 1997 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 1998 bool IsSimple, bool IsVolatile, 1999 unsigned NumOutputs, unsigned NumInputs, 2000 IdentifierInfo **Names, 2001 MultiExprArg Constraints, 2002 MultiExprArg Exprs, 2003 Expr *AsmString, 2004 MultiExprArg Clobbers, 2005 SourceLocation RParenLoc, 2006 bool MSAsm = false); 2007 2008 2009 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2010 SourceLocation StartLoc, 2011 SourceLocation IdLoc, IdentifierInfo *Id, 2012 bool Invalid = false); 2013 2014 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2015 2016 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2017 Decl *Parm, Stmt *Body); 2018 2019 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2020 2021 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2022 MultiStmtArg Catch, Stmt *Finally); 2023 2024 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2025 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2026 Scope *CurScope); 2027 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2028 Expr *SynchExpr, 2029 Stmt *SynchBody); 2030 2031 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2032 SourceLocation StartLoc, 2033 SourceLocation IdLoc, 2034 IdentifierInfo *Id); 2035 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2036 2037 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2038 Decl *ExDecl, Stmt *HandlerBlock); 2039 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2040 MultiStmtArg Handlers); 2041 2042 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2043 SourceLocation TryLoc, 2044 Stmt *TryBlock, 2045 Stmt *Handler); 2046 2047 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2048 Expr *FilterExpr, 2049 Stmt *Block); 2050 2051 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2052 Stmt *Block); 2053 2054 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2055 2056 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2057 2058 /// \brief If it's a file scoped decl that must warn if not used, keep track 2059 /// of it. 2060 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2061 2062 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2063 /// whose result is unused, warn. 2064 void DiagnoseUnusedExprResult(const Stmt *S); 2065 void DiagnoseUnusedDecl(const NamedDecl *ND); 2066 2067 ParsingDeclState PushParsingDeclaration() { 2068 return DelayedDiagnostics.pushParsingDecl(); 2069 } 2070 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2071 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2072 } 2073 2074 typedef ProcessingContextState ParsingClassState; 2075 ParsingClassState PushParsingClass() { 2076 return DelayedDiagnostics.pushContext(); 2077 } 2078 void PopParsingClass(ParsingClassState state) { 2079 DelayedDiagnostics.popContext(state); 2080 } 2081 2082 void EmitDeprecationWarning(NamedDecl *D, llvm::StringRef Message, 2083 SourceLocation Loc, 2084 const ObjCInterfaceDecl *UnknownObjCClass=0); 2085 2086 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2087 2088 //===--------------------------------------------------------------------===// 2089 // Expression Parsing Callbacks: SemaExpr.cpp. 2090 2091 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2092 const ObjCInterfaceDecl *UnknownObjCClass=0); 2093 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2094 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2095 ObjCMethodDecl *Getter, 2096 SourceLocation Loc); 2097 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2098 Expr **Args, unsigned NumArgs); 2099 2100 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 2101 2102 void PopExpressionEvaluationContext(); 2103 2104 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 2105 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2106 void MarkDeclarationsReferencedInExpr(Expr *E); 2107 2108 /// \brief Figure out if an expression could be turned into a call. 2109 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2110 UnresolvedSetImpl &NonTemplateOverloads); 2111 /// \brief Give notes for a set of overloads. 2112 void NoteOverloads(const UnresolvedSetImpl &Overloads, 2113 const SourceLocation FinalNoteLoc); 2114 2115 /// \brief Conditionally issue a diagnostic based on the current 2116 /// evaluation context. 2117 /// 2118 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2119 /// the function body is parsed, and then do a basic reachability analysis to 2120 /// determine if the statement is reachable. If it is unreachable, the 2121 /// diagnostic will not be emitted. 2122 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *stmt, 2123 const PartialDiagnostic &PD); 2124 2125 // Primary Expressions. 2126 SourceRange getExprRange(Expr *E) const; 2127 2128 ObjCIvarDecl *SynthesizeProvisionalIvar(LookupResult &Lookup, 2129 IdentifierInfo *II, 2130 SourceLocation NameLoc); 2131 2132 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Name, 2133 bool HasTrailingLParen, bool IsAddressOfOperand); 2134 2135 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2136 CorrectTypoContext CTC = CTC_Unknown); 2137 2138 ExprResult LookupInObjCMethod(LookupResult &R, Scope *S, IdentifierInfo *II, 2139 bool AllowBuiltinCreation=false); 2140 2141 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2142 const DeclarationNameInfo &NameInfo, 2143 bool isAddressOfOperand, 2144 const TemplateArgumentListInfo *TemplateArgs); 2145 2146 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2147 ExprValueKind VK, 2148 SourceLocation Loc, 2149 const CXXScopeSpec *SS = 0); 2150 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2151 ExprValueKind VK, 2152 const DeclarationNameInfo &NameInfo, 2153 const CXXScopeSpec *SS = 0); 2154 ExprResult 2155 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2156 SourceLocation nameLoc, 2157 IndirectFieldDecl *indirectField, 2158 Expr *baseObjectExpr = 0, 2159 SourceLocation opLoc = SourceLocation()); 2160 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2161 LookupResult &R, 2162 const TemplateArgumentListInfo *TemplateArgs); 2163 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2164 LookupResult &R, 2165 const TemplateArgumentListInfo *TemplateArgs, 2166 bool IsDefiniteInstance); 2167 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2168 const LookupResult &R, 2169 bool HasTrailingLParen); 2170 2171 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2172 const DeclarationNameInfo &NameInfo); 2173 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2174 const DeclarationNameInfo &NameInfo, 2175 const TemplateArgumentListInfo *TemplateArgs); 2176 2177 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2178 LookupResult &R, 2179 bool ADL); 2180 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2181 const DeclarationNameInfo &NameInfo, 2182 NamedDecl *D); 2183 2184 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2185 ExprResult ActOnNumericConstant(const Token &); 2186 ExprResult ActOnCharacterConstant(const Token &); 2187 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *Val); 2188 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2189 SourceLocation R, 2190 MultiExprArg Val, 2191 ParsedType TypeOfCast = ParsedType()); 2192 2193 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2194 /// fragments (e.g. "foo" "bar" L"baz"). 2195 ExprResult ActOnStringLiteral(const Token *Toks, unsigned NumToks); 2196 2197 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2198 SourceLocation DefaultLoc, 2199 SourceLocation RParenLoc, 2200 Expr *ControllingExpr, 2201 MultiTypeArg Types, 2202 MultiExprArg Exprs); 2203 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2204 SourceLocation DefaultLoc, 2205 SourceLocation RParenLoc, 2206 Expr *ControllingExpr, 2207 TypeSourceInfo **Types, 2208 Expr **Exprs, 2209 unsigned NumAssocs); 2210 2211 // Binary/Unary Operators. 'Tok' is the token for the operator. 2212 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2213 Expr *InputArg); 2214 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2215 UnaryOperatorKind Opc, Expr *input); 2216 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2217 tok::TokenKind Op, Expr *Input); 2218 2219 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *T, 2220 SourceLocation OpLoc, 2221 UnaryExprOrTypeTrait ExprKind, 2222 SourceRange R); 2223 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2224 UnaryExprOrTypeTrait ExprKind); 2225 ExprResult 2226 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2227 UnaryExprOrTypeTrait ExprKind, 2228 bool isType, void *TyOrEx, 2229 const SourceRange &ArgRange); 2230 2231 ExprResult CheckPlaceholderExpr(Expr *E); 2232 bool CheckVecStepExpr(Expr *E); 2233 2234 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2235 bool CheckUnaryExprOrTypeTraitOperand(QualType type, SourceLocation OpLoc, 2236 SourceRange R, 2237 UnaryExprOrTypeTrait ExprKind); 2238 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2239 SourceLocation OpLoc, 2240 IdentifierInfo &Name, 2241 SourceLocation NameLoc, 2242 SourceLocation RParenLoc); 2243 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2244 tok::TokenKind Kind, Expr *Input); 2245 2246 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2247 Expr *Idx, SourceLocation RLoc); 2248 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2249 Expr *Idx, SourceLocation RLoc); 2250 2251 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2252 SourceLocation OpLoc, bool IsArrow, 2253 CXXScopeSpec &SS, 2254 NamedDecl *FirstQualifierInScope, 2255 const DeclarationNameInfo &NameInfo, 2256 const TemplateArgumentListInfo *TemplateArgs); 2257 2258 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2259 SourceLocation OpLoc, bool IsArrow, 2260 const CXXScopeSpec &SS, 2261 NamedDecl *FirstQualifierInScope, 2262 LookupResult &R, 2263 const TemplateArgumentListInfo *TemplateArgs, 2264 bool SuppressQualifierCheck = false); 2265 2266 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2267 bool &IsArrow, SourceLocation OpLoc, 2268 CXXScopeSpec &SS, 2269 Decl *ObjCImpDecl, 2270 bool HasTemplateArgs); 2271 2272 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2273 const CXXScopeSpec &SS, 2274 const LookupResult &R); 2275 2276 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2277 bool IsArrow, SourceLocation OpLoc, 2278 const CXXScopeSpec &SS, 2279 NamedDecl *FirstQualifierInScope, 2280 const DeclarationNameInfo &NameInfo, 2281 const TemplateArgumentListInfo *TemplateArgs); 2282 2283 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2284 SourceLocation OpLoc, 2285 tok::TokenKind OpKind, 2286 CXXScopeSpec &SS, 2287 UnqualifiedId &Member, 2288 Decl *ObjCImpDecl, 2289 bool HasTrailingLParen); 2290 2291 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2292 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2293 FunctionDecl *FDecl, 2294 const FunctionProtoType *Proto, 2295 Expr **Args, unsigned NumArgs, 2296 SourceLocation RParenLoc); 2297 2298 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2299 /// This provides the location of the left/right parens and a list of comma 2300 /// locations. 2301 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2302 MultiExprArg Args, SourceLocation RParenLoc, 2303 Expr *ExecConfig = 0); 2304 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2305 SourceLocation LParenLoc, 2306 Expr **Args, unsigned NumArgs, 2307 SourceLocation RParenLoc, 2308 Expr *ExecConfig = 0); 2309 2310 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2311 MultiExprArg ExecConfig, SourceLocation GGGLoc); 2312 2313 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2314 ParsedType Ty, SourceLocation RParenLoc, 2315 Expr *Op); 2316 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2317 TypeSourceInfo *Ty, 2318 SourceLocation RParenLoc, 2319 Expr *Op); 2320 2321 bool TypeIsVectorType(ParsedType Ty) { 2322 return GetTypeFromParser(Ty)->isVectorType(); 2323 } 2324 2325 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2326 ExprResult ActOnCastOfParenListExpr(Scope *S, SourceLocation LParenLoc, 2327 SourceLocation RParenLoc, Expr *E, 2328 TypeSourceInfo *TInfo); 2329 2330 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2331 ParsedType Ty, 2332 SourceLocation RParenLoc, 2333 Expr *Op); 2334 2335 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2336 TypeSourceInfo *TInfo, 2337 SourceLocation RParenLoc, 2338 Expr *InitExpr); 2339 2340 ExprResult ActOnInitList(SourceLocation LParenLoc, 2341 MultiExprArg InitList, 2342 SourceLocation RParenLoc); 2343 2344 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2345 SourceLocation Loc, 2346 bool GNUSyntax, 2347 ExprResult Init); 2348 2349 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2350 tok::TokenKind Kind, Expr *LHS, Expr *RHS); 2351 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2352 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2353 ExprResult CreateBuiltinBinOp(SourceLocation TokLoc, 2354 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2355 2356 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2357 /// in the case of a the GNU conditional expr extension. 2358 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2359 SourceLocation ColonLoc, 2360 Expr *Cond, Expr *LHS, Expr *RHS); 2361 2362 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2363 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2364 LabelDecl *LD); 2365 2366 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2367 SourceLocation RPLoc); // "({..})" 2368 2369 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2370 struct OffsetOfComponent { 2371 SourceLocation LocStart, LocEnd; 2372 bool isBrackets; // true if [expr], false if .ident 2373 union { 2374 IdentifierInfo *IdentInfo; 2375 ExprTy *E; 2376 } U; 2377 }; 2378 2379 /// __builtin_offsetof(type, a.b[123][456].c) 2380 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2381 TypeSourceInfo *TInfo, 2382 OffsetOfComponent *CompPtr, 2383 unsigned NumComponents, 2384 SourceLocation RParenLoc); 2385 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2386 SourceLocation BuiltinLoc, 2387 SourceLocation TypeLoc, 2388 ParsedType Arg1, 2389 OffsetOfComponent *CompPtr, 2390 unsigned NumComponents, 2391 SourceLocation RParenLoc); 2392 2393 // __builtin_choose_expr(constExpr, expr1, expr2) 2394 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2395 Expr *cond, Expr *expr1, 2396 Expr *expr2, SourceLocation RPLoc); 2397 2398 // __builtin_va_arg(expr, type) 2399 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, 2400 Expr *expr, ParsedType type, 2401 SourceLocation RPLoc); 2402 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, 2403 Expr *expr, TypeSourceInfo *TInfo, 2404 SourceLocation RPLoc); 2405 2406 // __null 2407 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2408 2409 bool CheckCaseExpression(Expr *expr); 2410 2411 bool CheckMicrosoftIfExistsSymbol(CXXScopeSpec &SS, UnqualifiedId &Name); 2412 2413 //===------------------------- "Block" Extension ------------------------===// 2414 2415 /// ActOnBlockStart - This callback is invoked when a block literal is 2416 /// started. 2417 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2418 2419 /// ActOnBlockArguments - This callback allows processing of block arguments. 2420 /// If there are no arguments, this is still invoked. 2421 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2422 2423 /// ActOnBlockError - If there is an error parsing a block, this callback 2424 /// is invoked to pop the information about the block from the action impl. 2425 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2426 2427 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2428 /// literal was successfully completed. ^(int x){...} 2429 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, 2430 Stmt *Body, Scope *CurScope); 2431 2432 //===---------------------------- C++ Features --------------------------===// 2433 2434 // Act on C++ namespaces 2435 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2436 SourceLocation NamespaceLoc, 2437 SourceLocation IdentLoc, 2438 IdentifierInfo *Ident, 2439 SourceLocation LBrace, 2440 AttributeList *AttrList); 2441 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2442 2443 NamespaceDecl *getStdNamespace() const; 2444 NamespaceDecl *getOrCreateStdNamespace(); 2445 2446 CXXRecordDecl *getStdBadAlloc() const; 2447 2448 Decl *ActOnUsingDirective(Scope *CurScope, 2449 SourceLocation UsingLoc, 2450 SourceLocation NamespcLoc, 2451 CXXScopeSpec &SS, 2452 SourceLocation IdentLoc, 2453 IdentifierInfo *NamespcName, 2454 AttributeList *AttrList); 2455 2456 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2457 2458 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2459 SourceLocation NamespaceLoc, 2460 SourceLocation AliasLoc, 2461 IdentifierInfo *Alias, 2462 CXXScopeSpec &SS, 2463 SourceLocation IdentLoc, 2464 IdentifierInfo *Ident); 2465 2466 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2467 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2468 const LookupResult &PreviousDecls); 2469 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2470 NamedDecl *Target); 2471 2472 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2473 bool isTypeName, 2474 const CXXScopeSpec &SS, 2475 SourceLocation NameLoc, 2476 const LookupResult &Previous); 2477 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2478 const CXXScopeSpec &SS, 2479 SourceLocation NameLoc); 2480 2481 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2482 SourceLocation UsingLoc, 2483 CXXScopeSpec &SS, 2484 const DeclarationNameInfo &NameInfo, 2485 AttributeList *AttrList, 2486 bool IsInstantiation, 2487 bool IsTypeName, 2488 SourceLocation TypenameLoc); 2489 2490 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2491 2492 Decl *ActOnUsingDeclaration(Scope *CurScope, 2493 AccessSpecifier AS, 2494 bool HasUsingKeyword, 2495 SourceLocation UsingLoc, 2496 CXXScopeSpec &SS, 2497 UnqualifiedId &Name, 2498 AttributeList *AttrList, 2499 bool IsTypeName, 2500 SourceLocation TypenameLoc); 2501 Decl *ActOnAliasDeclaration(Scope *CurScope, 2502 AccessSpecifier AS, 2503 MultiTemplateParamsArg TemplateParams, 2504 SourceLocation UsingLoc, 2505 UnqualifiedId &Name, 2506 TypeResult Type); 2507 2508 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2509 /// ActOnDeclarator, when a C++ direct initializer is present. 2510 /// e.g: "int x(1);" 2511 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2512 SourceLocation LParenLoc, 2513 MultiExprArg Exprs, 2514 SourceLocation RParenLoc, 2515 bool TypeMayContainAuto); 2516 2517 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2518 /// and sets it as the initializer for the the passed in VarDecl. 2519 bool InitializeVarWithConstructor(VarDecl *VD, 2520 CXXConstructorDecl *Constructor, 2521 MultiExprArg Exprs); 2522 2523 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2524 /// including handling of its default argument expressions. 2525 /// 2526 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2527 ExprResult 2528 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2529 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2530 bool RequiresZeroInit, unsigned ConstructKind, 2531 SourceRange ParenRange); 2532 2533 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2534 // the constructor can be elidable? 2535 ExprResult 2536 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2537 CXXConstructorDecl *Constructor, bool Elidable, 2538 MultiExprArg Exprs, bool RequiresZeroInit, 2539 unsigned ConstructKind, 2540 SourceRange ParenRange); 2541 2542 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2543 /// the default expr if needed. 2544 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2545 FunctionDecl *FD, 2546 ParmVarDecl *Param); 2547 2548 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2549 /// constructed variable. 2550 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2551 2552 /// \brief Helper class that collects exception specifications for 2553 /// implicitly-declared special member functions. 2554 class ImplicitExceptionSpecification { 2555 // Pointer to allow copying 2556 ASTContext *Context; 2557 // We order exception specifications thus: 2558 // noexcept is the most restrictive, but is only used in C++0x. 2559 // throw() comes next. 2560 // Then a throw(collected exceptions) 2561 // Finally no specification. 2562 // throw(...) is used instead if any called function uses it. 2563 ExceptionSpecificationType ComputedEST; 2564 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2565 llvm::SmallVector<QualType, 4> Exceptions; 2566 2567 void ClearExceptions() { 2568 ExceptionsSeen.clear(); 2569 Exceptions.clear(); 2570 } 2571 2572 public: 2573 explicit ImplicitExceptionSpecification(ASTContext &Context) 2574 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2575 if (!Context.getLangOptions().CPlusPlus0x) 2576 ComputedEST = EST_DynamicNone; 2577 } 2578 2579 /// \brief Get the computed exception specification type. 2580 ExceptionSpecificationType getExceptionSpecType() const { 2581 assert(ComputedEST != EST_ComputedNoexcept && 2582 "noexcept(expr) should not be a possible result"); 2583 return ComputedEST; 2584 } 2585 2586 /// \brief The number of exceptions in the exception specification. 2587 unsigned size() const { return Exceptions.size(); } 2588 2589 /// \brief The set of exceptions in the exception specification. 2590 const QualType *data() const { return Exceptions.data(); } 2591 2592 /// \brief Integrate another called method into the collected data. 2593 void CalledDecl(CXXMethodDecl *Method); 2594 2595 FunctionProtoType::ExtProtoInfo getEPI() const { 2596 FunctionProtoType::ExtProtoInfo EPI; 2597 EPI.ExceptionSpecType = getExceptionSpecType(); 2598 EPI.NumExceptions = size(); 2599 EPI.Exceptions = data(); 2600 return EPI; 2601 } 2602 }; 2603 2604 /// \brief Determine what sort of exception specification a defaulted 2605 /// copy constructor of a class will have. 2606 ImplicitExceptionSpecification 2607 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2608 2609 /// \brief Determine what sort of exception specification a defaulted 2610 /// default constructor of a class will have, and whether the parameter 2611 /// will be const. 2612 std::pair<ImplicitExceptionSpecification, bool> 2613 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2614 2615 /// \brief Determine what sort of exception specification a defautled 2616 /// copy assignment operator of a class will have, and whether the 2617 /// parameter will be const. 2618 std::pair<ImplicitExceptionSpecification, bool> 2619 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2620 2621 /// \brief Determine what sort of exception specification a defaulted 2622 /// destructor of a class will have. 2623 ImplicitExceptionSpecification 2624 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 2625 2626 /// \brief Determine if a defaulted default constructor ought to be 2627 /// deleted. 2628 bool ShouldDeleteDefaultConstructor(CXXConstructorDecl *CD); 2629 2630 /// \brief Determine if a defaulted copy constructor ought to be 2631 /// deleted. 2632 bool ShouldDeleteCopyConstructor(CXXConstructorDecl *CD); 2633 2634 /// \brief Determine if a defaulted copy assignment operator ought to be 2635 /// deleted. 2636 bool ShouldDeleteCopyAssignmentOperator(CXXMethodDecl *MD); 2637 2638 /// \brief Determine if a defaulted destructor ought to be deleted. 2639 bool ShouldDeleteDestructor(CXXDestructorDecl *DD); 2640 2641 /// \brief Declare the implicit default constructor for the given class. 2642 /// 2643 /// \param ClassDecl The class declaration into which the implicit 2644 /// default constructor will be added. 2645 /// 2646 /// \returns The implicitly-declared default constructor. 2647 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2648 CXXRecordDecl *ClassDecl); 2649 2650 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2651 /// defining this constructor as the default constructor. 2652 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2653 CXXConstructorDecl *Constructor); 2654 2655 /// \brief Declare the implicit destructor for the given class. 2656 /// 2657 /// \param ClassDecl The class declaration into which the implicit 2658 /// destructor will be added. 2659 /// 2660 /// \returns The implicitly-declared destructor. 2661 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2662 2663 /// DefineImplicitDestructor - Checks for feasibility of 2664 /// defining this destructor as the default destructor. 2665 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2666 CXXDestructorDecl *Destructor); 2667 2668 /// \brief Build an exception spec for destructors that don't have one. 2669 /// 2670 /// C++11 says that user-defined destructors with no exception spec get one 2671 /// that looks as if the destructor was implicitly declared. 2672 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 2673 CXXDestructorDecl *Destructor); 2674 2675 /// \brief Declare all inherited constructors for the given class. 2676 /// 2677 /// \param ClassDecl The class declaration into which the inherited 2678 /// constructors will be added. 2679 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2680 2681 /// \brief Declare the implicit copy constructor for the given class. 2682 /// 2683 /// \param S The scope of the class, which may be NULL if this is a 2684 /// template instantiation. 2685 /// 2686 /// \param ClassDecl The class declaration into which the implicit 2687 /// copy constructor will be added. 2688 /// 2689 /// \returns The implicitly-declared copy constructor. 2690 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2691 2692 /// DefineImplicitCopyConstructor - Checks for feasibility of 2693 /// defining this constructor as the copy constructor. 2694 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2695 CXXConstructorDecl *Constructor); 2696 2697 /// \brief Declare the implicit copy assignment operator for the given class. 2698 /// 2699 /// \param S The scope of the class, which may be NULL if this is a 2700 /// template instantiation. 2701 /// 2702 /// \param ClassDecl The class declaration into which the implicit 2703 /// copy-assignment operator will be added. 2704 /// 2705 /// \returns The implicitly-declared copy assignment operator. 2706 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2707 2708 /// \brief Defined an implicitly-declared copy assignment operator. 2709 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2710 CXXMethodDecl *MethodDecl); 2711 2712 /// \brief Force the declaration of any implicitly-declared members of this 2713 /// class. 2714 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2715 2716 /// MaybeBindToTemporary - If the passed in expression has a record type with 2717 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 2718 /// it simply returns the passed in expression. 2719 ExprResult MaybeBindToTemporary(Expr *E); 2720 2721 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 2722 MultiExprArg ArgsPtr, 2723 SourceLocation Loc, 2724 ASTOwningVector<Expr*> &ConvertedArgs); 2725 2726 ParsedType getDestructorName(SourceLocation TildeLoc, 2727 IdentifierInfo &II, SourceLocation NameLoc, 2728 Scope *S, CXXScopeSpec &SS, 2729 ParsedType ObjectType, 2730 bool EnteringContext); 2731 2732 // Checks that reinterpret casts don't have undefined behavior. 2733 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 2734 bool IsDereference, SourceRange Range); 2735 2736 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 2737 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 2738 tok::TokenKind Kind, 2739 SourceLocation LAngleBracketLoc, 2740 ParsedType Ty, 2741 SourceLocation RAngleBracketLoc, 2742 SourceLocation LParenLoc, 2743 Expr *E, 2744 SourceLocation RParenLoc); 2745 2746 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 2747 tok::TokenKind Kind, 2748 TypeSourceInfo *Ty, 2749 Expr *E, 2750 SourceRange AngleBrackets, 2751 SourceRange Parens); 2752 2753 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2754 SourceLocation TypeidLoc, 2755 TypeSourceInfo *Operand, 2756 SourceLocation RParenLoc); 2757 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2758 SourceLocation TypeidLoc, 2759 Expr *Operand, 2760 SourceLocation RParenLoc); 2761 2762 /// ActOnCXXTypeid - Parse typeid( something ). 2763 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 2764 SourceLocation LParenLoc, bool isType, 2765 void *TyOrExpr, 2766 SourceLocation RParenLoc); 2767 2768 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2769 SourceLocation TypeidLoc, 2770 TypeSourceInfo *Operand, 2771 SourceLocation RParenLoc); 2772 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2773 SourceLocation TypeidLoc, 2774 Expr *Operand, 2775 SourceLocation RParenLoc); 2776 2777 /// ActOnCXXUuidof - Parse __uuidof( something ). 2778 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 2779 SourceLocation LParenLoc, bool isType, 2780 void *TyOrExpr, 2781 SourceLocation RParenLoc); 2782 2783 2784 //// ActOnCXXThis - Parse 'this' pointer. 2785 ExprResult ActOnCXXThis(SourceLocation loc); 2786 2787 /// tryCaptureCXXThis - Try to capture a 'this' pointer. Returns a 2788 /// pointer to an instance method whose 'this' pointer is 2789 /// capturable, or null if this is not possible. 2790 CXXMethodDecl *tryCaptureCXXThis(); 2791 2792 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 2793 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 2794 2795 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 2796 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 2797 2798 //// ActOnCXXThrow - Parse throw expressions. 2799 ExprResult ActOnCXXThrow(SourceLocation OpLoc, Expr *expr); 2800 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E); 2801 2802 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 2803 /// Can be interpreted either as function-style casting ("int(x)") 2804 /// or class type construction ("ClassType(x,y,z)") 2805 /// or creation of a value-initialized type ("int()"). 2806 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 2807 SourceLocation LParenLoc, 2808 MultiExprArg Exprs, 2809 SourceLocation RParenLoc); 2810 2811 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 2812 SourceLocation LParenLoc, 2813 MultiExprArg Exprs, 2814 SourceLocation RParenLoc); 2815 2816 /// ActOnCXXNew - Parsed a C++ 'new' expression. 2817 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 2818 SourceLocation PlacementLParen, 2819 MultiExprArg PlacementArgs, 2820 SourceLocation PlacementRParen, 2821 SourceRange TypeIdParens, Declarator &D, 2822 SourceLocation ConstructorLParen, 2823 MultiExprArg ConstructorArgs, 2824 SourceLocation ConstructorRParen); 2825 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 2826 SourceLocation PlacementLParen, 2827 MultiExprArg PlacementArgs, 2828 SourceLocation PlacementRParen, 2829 SourceRange TypeIdParens, 2830 QualType AllocType, 2831 TypeSourceInfo *AllocTypeInfo, 2832 Expr *ArraySize, 2833 SourceLocation ConstructorLParen, 2834 MultiExprArg ConstructorArgs, 2835 SourceLocation ConstructorRParen, 2836 bool TypeMayContainAuto = true); 2837 2838 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 2839 SourceRange R); 2840 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 2841 bool UseGlobal, QualType AllocType, bool IsArray, 2842 Expr **PlaceArgs, unsigned NumPlaceArgs, 2843 FunctionDecl *&OperatorNew, 2844 FunctionDecl *&OperatorDelete); 2845 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 2846 DeclarationName Name, Expr** Args, 2847 unsigned NumArgs, DeclContext *Ctx, 2848 bool AllowMissing, FunctionDecl *&Operator, 2849 bool Diagnose = true); 2850 void DeclareGlobalNewDelete(); 2851 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 2852 QualType Argument, 2853 bool addMallocAttr = false); 2854 2855 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 2856 DeclarationName Name, FunctionDecl* &Operator, 2857 bool Diagnose = true); 2858 2859 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 2860 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 2861 bool UseGlobal, bool ArrayForm, 2862 Expr *Operand); 2863 2864 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 2865 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 2866 SourceLocation StmtLoc, 2867 bool ConvertToBoolean); 2868 2869 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 2870 Expr *Operand, SourceLocation RParen); 2871 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 2872 SourceLocation RParen); 2873 2874 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 2875 /// pseudo-functions. 2876 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 2877 SourceLocation KWLoc, 2878 ParsedType Ty, 2879 SourceLocation RParen); 2880 2881 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 2882 SourceLocation KWLoc, 2883 TypeSourceInfo *T, 2884 SourceLocation RParen); 2885 2886 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 2887 /// pseudo-functions. 2888 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 2889 SourceLocation KWLoc, 2890 ParsedType LhsTy, 2891 ParsedType RhsTy, 2892 SourceLocation RParen); 2893 2894 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 2895 SourceLocation KWLoc, 2896 TypeSourceInfo *LhsT, 2897 TypeSourceInfo *RhsT, 2898 SourceLocation RParen); 2899 2900 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 2901 /// pseudo-functions. 2902 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 2903 SourceLocation KWLoc, 2904 ParsedType LhsTy, 2905 Expr *DimExpr, 2906 SourceLocation RParen); 2907 2908 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 2909 SourceLocation KWLoc, 2910 TypeSourceInfo *TSInfo, 2911 Expr *DimExpr, 2912 SourceLocation RParen); 2913 2914 /// ActOnExpressionTrait - Parsed one of the unary type trait support 2915 /// pseudo-functions. 2916 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 2917 SourceLocation KWLoc, 2918 Expr *Queried, 2919 SourceLocation RParen); 2920 2921 ExprResult BuildExpressionTrait(ExpressionTrait OET, 2922 SourceLocation KWLoc, 2923 Expr *Queried, 2924 SourceLocation RParen); 2925 2926 ExprResult ActOnStartCXXMemberReference(Scope *S, 2927 Expr *Base, 2928 SourceLocation OpLoc, 2929 tok::TokenKind OpKind, 2930 ParsedType &ObjectType, 2931 bool &MayBePseudoDestructor); 2932 2933 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 2934 2935 ExprResult BuildPseudoDestructorExpr(Expr *Base, 2936 SourceLocation OpLoc, 2937 tok::TokenKind OpKind, 2938 const CXXScopeSpec &SS, 2939 TypeSourceInfo *ScopeType, 2940 SourceLocation CCLoc, 2941 SourceLocation TildeLoc, 2942 PseudoDestructorTypeStorage DestroyedType, 2943 bool HasTrailingLParen); 2944 2945 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 2946 SourceLocation OpLoc, 2947 tok::TokenKind OpKind, 2948 CXXScopeSpec &SS, 2949 UnqualifiedId &FirstTypeName, 2950 SourceLocation CCLoc, 2951 SourceLocation TildeLoc, 2952 UnqualifiedId &SecondTypeName, 2953 bool HasTrailingLParen); 2954 2955 /// MaybeCreateExprWithCleanups - If the current full-expression 2956 /// requires any cleanups, surround it with a ExprWithCleanups node. 2957 /// Otherwise, just returns the passed-in expression. 2958 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 2959 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 2960 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 2961 2962 ExprResult ActOnFinishFullExpr(Expr *Expr); 2963 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 2964 2965 // Marks SS invalid if it represents an incomplete type. 2966 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 2967 2968 DeclContext *computeDeclContext(QualType T); 2969 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 2970 bool EnteringContext = false); 2971 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 2972 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 2973 bool isUnknownSpecialization(const CXXScopeSpec &SS); 2974 2975 /// \brief The parser has parsed a global nested-name-specifier '::'. 2976 /// 2977 /// \param S The scope in which this nested-name-specifier occurs. 2978 /// 2979 /// \param CCLoc The location of the '::'. 2980 /// 2981 /// \param SS The nested-name-specifier, which will be updated in-place 2982 /// to reflect the parsed nested-name-specifier. 2983 /// 2984 /// \returns true if an error occurred, false otherwise. 2985 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 2986 CXXScopeSpec &SS); 2987 2988 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 2989 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 2990 2991 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 2992 SourceLocation IdLoc, 2993 IdentifierInfo &II, 2994 ParsedType ObjectType); 2995 2996 bool BuildCXXNestedNameSpecifier(Scope *S, 2997 IdentifierInfo &Identifier, 2998 SourceLocation IdentifierLoc, 2999 SourceLocation CCLoc, 3000 QualType ObjectType, 3001 bool EnteringContext, 3002 CXXScopeSpec &SS, 3003 NamedDecl *ScopeLookupResult, 3004 bool ErrorRecoveryLookup); 3005 3006 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3007 /// 3008 /// \param S The scope in which this nested-name-specifier occurs. 3009 /// 3010 /// \param Identifier The identifier preceding the '::'. 3011 /// 3012 /// \param IdentifierLoc The location of the identifier. 3013 /// 3014 /// \param CCLoc The location of the '::'. 3015 /// 3016 /// \param ObjectType The type of the object, if we're parsing 3017 /// nested-name-specifier in a member access expression. 3018 /// 3019 /// \param EnteringContext Whether we're entering the context nominated by 3020 /// this nested-name-specifier. 3021 /// 3022 /// \param SS The nested-name-specifier, which is both an input 3023 /// parameter (the nested-name-specifier before this type) and an 3024 /// output parameter (containing the full nested-name-specifier, 3025 /// including this new type). 3026 /// 3027 /// \returns true if an error occurred, false otherwise. 3028 bool ActOnCXXNestedNameSpecifier(Scope *S, 3029 IdentifierInfo &Identifier, 3030 SourceLocation IdentifierLoc, 3031 SourceLocation CCLoc, 3032 ParsedType ObjectType, 3033 bool EnteringContext, 3034 CXXScopeSpec &SS); 3035 3036 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3037 IdentifierInfo &Identifier, 3038 SourceLocation IdentifierLoc, 3039 SourceLocation ColonLoc, 3040 ParsedType ObjectType, 3041 bool EnteringContext); 3042 3043 /// \brief The parser has parsed a nested-name-specifier 3044 /// 'template[opt] template-name < template-args >::'. 3045 /// 3046 /// \param S The scope in which this nested-name-specifier occurs. 3047 /// 3048 /// \param TemplateLoc The location of the 'template' keyword, if any. 3049 /// 3050 /// \param SS The nested-name-specifier, which is both an input 3051 /// parameter (the nested-name-specifier before this type) and an 3052 /// output parameter (containing the full nested-name-specifier, 3053 /// including this new type). 3054 /// 3055 /// \param TemplateLoc the location of the 'template' keyword, if any. 3056 /// \param TemplateName The template name. 3057 /// \param TemplateNameLoc The location of the template name. 3058 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3059 /// \param TemplateArgs The template arguments. 3060 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3061 /// \param CCLoc The location of the '::'. 3062 3063 /// \param EnteringContext Whether we're entering the context of the 3064 /// nested-name-specifier. 3065 /// 3066 /// 3067 /// \returns true if an error occurred, false otherwise. 3068 bool ActOnCXXNestedNameSpecifier(Scope *S, 3069 SourceLocation TemplateLoc, 3070 CXXScopeSpec &SS, 3071 TemplateTy Template, 3072 SourceLocation TemplateNameLoc, 3073 SourceLocation LAngleLoc, 3074 ASTTemplateArgsPtr TemplateArgs, 3075 SourceLocation RAngleLoc, 3076 SourceLocation CCLoc, 3077 bool EnteringContext); 3078 3079 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3080 /// that the parser can use later to reconstruct the given 3081 /// nested-name-specifier. 3082 /// 3083 /// \param SS A nested-name-specifier. 3084 /// 3085 /// \returns A pointer containing all of the information in the 3086 /// nested-name-specifier \p SS. 3087 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3088 3089 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3090 /// the nested-name-specifier structure. 3091 /// 3092 /// \param Annotation The annotation pointer, produced by 3093 /// \c SaveNestedNameSpecifierAnnotation(). 3094 /// 3095 /// \param AnnotationRange The source range corresponding to the annotation. 3096 /// 3097 /// \param SS The nested-name-specifier that will be updated with the contents 3098 /// of the annotation pointer. 3099 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3100 SourceRange AnnotationRange, 3101 CXXScopeSpec &SS); 3102 3103 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3104 3105 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3106 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3107 /// After this method is called, according to [C++ 3.4.3p3], names should be 3108 /// looked up in the declarator-id's scope, until the declarator is parsed and 3109 /// ActOnCXXExitDeclaratorScope is called. 3110 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3111 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3112 3113 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3114 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3115 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3116 /// Used to indicate that names should revert to being looked up in the 3117 /// defining scope. 3118 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3119 3120 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3121 /// initializer for the declaration 'Dcl'. 3122 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3123 /// static data member of class X, names should be looked up in the scope of 3124 /// class X. 3125 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3126 3127 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3128 /// initializer for the declaration 'Dcl'. 3129 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3130 3131 // ParseObjCStringLiteral - Parse Objective-C string literals. 3132 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3133 Expr **Strings, 3134 unsigned NumStrings); 3135 3136 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3137 TypeSourceInfo *EncodedTypeInfo, 3138 SourceLocation RParenLoc); 3139 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3140 CXXMethodDecl *Method); 3141 3142 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3143 SourceLocation EncodeLoc, 3144 SourceLocation LParenLoc, 3145 ParsedType Ty, 3146 SourceLocation RParenLoc); 3147 3148 // ParseObjCSelectorExpression - Build selector expression for @selector 3149 ExprResult ParseObjCSelectorExpression(Selector Sel, 3150 SourceLocation AtLoc, 3151 SourceLocation SelLoc, 3152 SourceLocation LParenLoc, 3153 SourceLocation RParenLoc); 3154 3155 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3156 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3157 SourceLocation AtLoc, 3158 SourceLocation ProtoLoc, 3159 SourceLocation LParenLoc, 3160 SourceLocation RParenLoc); 3161 3162 //===--------------------------------------------------------------------===// 3163 // C++ Declarations 3164 // 3165 Decl *ActOnStartLinkageSpecification(Scope *S, 3166 SourceLocation ExternLoc, 3167 SourceLocation LangLoc, 3168 llvm::StringRef Lang, 3169 SourceLocation LBraceLoc); 3170 Decl *ActOnFinishLinkageSpecification(Scope *S, 3171 Decl *LinkageSpec, 3172 SourceLocation RBraceLoc); 3173 3174 3175 //===--------------------------------------------------------------------===// 3176 // C++ Classes 3177 // 3178 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3179 const CXXScopeSpec *SS = 0); 3180 3181 Decl *ActOnAccessSpecifier(AccessSpecifier Access, 3182 SourceLocation ASLoc, 3183 SourceLocation ColonLoc); 3184 3185 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3186 Declarator &D, 3187 MultiTemplateParamsArg TemplateParameterLists, 3188 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3189 Expr *Init, bool IsDefinition); 3190 3191 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3192 Scope *S, 3193 CXXScopeSpec &SS, 3194 IdentifierInfo *MemberOrBase, 3195 ParsedType TemplateTypeTy, 3196 SourceLocation IdLoc, 3197 SourceLocation LParenLoc, 3198 Expr **Args, unsigned NumArgs, 3199 SourceLocation RParenLoc, 3200 SourceLocation EllipsisLoc); 3201 3202 MemInitResult BuildMemberInitializer(ValueDecl *Member, Expr **Args, 3203 unsigned NumArgs, SourceLocation IdLoc, 3204 SourceLocation LParenLoc, 3205 SourceLocation RParenLoc); 3206 3207 MemInitResult BuildBaseInitializer(QualType BaseType, 3208 TypeSourceInfo *BaseTInfo, 3209 Expr **Args, unsigned NumArgs, 3210 SourceLocation LParenLoc, 3211 SourceLocation RParenLoc, 3212 CXXRecordDecl *ClassDecl, 3213 SourceLocation EllipsisLoc); 3214 3215 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3216 Expr **Args, unsigned NumArgs, 3217 SourceLocation BaseLoc, 3218 SourceLocation RParenLoc, 3219 SourceLocation LParenLoc, 3220 CXXRecordDecl *ClassDecl); 3221 3222 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3223 CXXCtorInitializer *Initializer); 3224 3225 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3226 CXXCtorInitializer **Initializers, 3227 unsigned NumInitializers, bool AnyErrors); 3228 3229 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3230 3231 3232 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3233 /// mark all the non-trivial destructors of its members and bases as 3234 /// referenced. 3235 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3236 CXXRecordDecl *Record); 3237 3238 /// \brief The list of classes whose vtables have been used within 3239 /// this translation unit, and the source locations at which the 3240 /// first use occurred. 3241 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3242 3243 /// \brief The list of vtables that are required but have not yet been 3244 /// materialized. 3245 llvm::SmallVector<VTableUse, 16> VTableUses; 3246 3247 /// \brief The set of classes whose vtables have been used within 3248 /// this translation unit, and a bit that will be true if the vtable is 3249 /// required to be emitted (otherwise, it should be emitted only if needed 3250 /// by code generation). 3251 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3252 3253 /// \brief A list of all of the dynamic classes in this translation 3254 /// unit. 3255 llvm::SmallVector<CXXRecordDecl *, 16> DynamicClasses; 3256 3257 /// \brief Note that the vtable for the given class was used at the 3258 /// given location. 3259 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3260 bool DefinitionRequired = false); 3261 3262 /// MarkVirtualMembersReferenced - Will mark all members of the given 3263 /// CXXRecordDecl referenced. 3264 void MarkVirtualMembersReferenced(SourceLocation Loc, 3265 const CXXRecordDecl *RD); 3266 3267 /// \brief Define all of the vtables that have been used in this 3268 /// translation unit and reference any virtual members used by those 3269 /// vtables. 3270 /// 3271 /// \returns true if any work was done, false otherwise. 3272 bool DefineUsedVTables(); 3273 3274 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3275 3276 void ActOnMemInitializers(Decl *ConstructorDecl, 3277 SourceLocation ColonLoc, 3278 MemInitTy **MemInits, unsigned NumMemInits, 3279 bool AnyErrors); 3280 3281 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3282 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3283 Decl *TagDecl, 3284 SourceLocation LBrac, 3285 SourceLocation RBrac, 3286 AttributeList *AttrList); 3287 3288 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3289 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3290 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3291 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3292 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3293 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3294 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3295 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3296 bool IsInsideALocalClassWithinATemplateFunction(); 3297 3298 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3299 Expr *AssertExpr, 3300 Expr *AssertMessageExpr, 3301 SourceLocation RParenLoc); 3302 3303 FriendDecl *CheckFriendTypeDecl(SourceLocation FriendLoc, 3304 TypeSourceInfo *TSInfo); 3305 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3306 MultiTemplateParamsArg TemplateParams); 3307 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, bool IsDefinition, 3308 MultiTemplateParamsArg TemplateParams); 3309 3310 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3311 StorageClass& SC); 3312 void CheckConstructor(CXXConstructorDecl *Constructor); 3313 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3314 StorageClass& SC); 3315 bool CheckDestructor(CXXDestructorDecl *Destructor); 3316 void CheckConversionDeclarator(Declarator &D, QualType &R, 3317 StorageClass& SC); 3318 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3319 3320 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3321 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3322 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3323 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3324 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3325 3326 //===--------------------------------------------------------------------===// 3327 // C++ Derived Classes 3328 // 3329 3330 /// ActOnBaseSpecifier - Parsed a base specifier 3331 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3332 SourceRange SpecifierRange, 3333 bool Virtual, AccessSpecifier Access, 3334 TypeSourceInfo *TInfo, 3335 SourceLocation EllipsisLoc); 3336 3337 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3338 SourceRange SpecifierRange, 3339 bool Virtual, AccessSpecifier Access, 3340 ParsedType basetype, 3341 SourceLocation BaseLoc, 3342 SourceLocation EllipsisLoc); 3343 3344 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3345 unsigned NumBases); 3346 void ActOnBaseSpecifiers(Decl *ClassDecl, BaseTy **Bases, unsigned NumBases); 3347 3348 bool IsDerivedFrom(QualType Derived, QualType Base); 3349 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3350 3351 // FIXME: I don't like this name. 3352 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3353 3354 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3355 3356 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3357 SourceLocation Loc, SourceRange Range, 3358 CXXCastPath *BasePath = 0, 3359 bool IgnoreAccess = false); 3360 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3361 unsigned InaccessibleBaseID, 3362 unsigned AmbigiousBaseConvID, 3363 SourceLocation Loc, SourceRange Range, 3364 DeclarationName Name, 3365 CXXCastPath *BasePath); 3366 3367 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3368 3369 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3370 /// covariant, according to C++ [class.virtual]p5. 3371 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3372 const CXXMethodDecl *Old); 3373 3374 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3375 /// spec is a subset of base spec. 3376 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3377 const CXXMethodDecl *Old); 3378 3379 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3380 3381 /// CheckOverrideControl - Check C++0x override control semantics. 3382 void CheckOverrideControl(const Decl *D); 3383 3384 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3385 /// overrides a virtual member function marked 'final', according to 3386 /// C++0x [class.virtual]p3. 3387 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3388 const CXXMethodDecl *Old); 3389 3390 3391 //===--------------------------------------------------------------------===// 3392 // C++ Access Control 3393 // 3394 3395 enum AccessResult { 3396 AR_accessible, 3397 AR_inaccessible, 3398 AR_dependent, 3399 AR_delayed 3400 }; 3401 3402 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3403 NamedDecl *PrevMemberDecl, 3404 AccessSpecifier LexicalAS); 3405 3406 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3407 DeclAccessPair FoundDecl); 3408 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3409 DeclAccessPair FoundDecl); 3410 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3411 SourceRange PlacementRange, 3412 CXXRecordDecl *NamingClass, 3413 DeclAccessPair FoundDecl, 3414 bool Diagnose = true); 3415 AccessResult CheckConstructorAccess(SourceLocation Loc, 3416 CXXConstructorDecl *D, 3417 const InitializedEntity &Entity, 3418 AccessSpecifier Access, 3419 bool IsCopyBindingRefToTemp = false); 3420 AccessResult CheckDestructorAccess(SourceLocation Loc, 3421 CXXDestructorDecl *Dtor, 3422 const PartialDiagnostic &PDiag); 3423 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3424 NamedDecl *D, 3425 const PartialDiagnostic &PDiag); 3426 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3427 Expr *ObjectExpr, 3428 Expr *ArgExpr, 3429 DeclAccessPair FoundDecl); 3430 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3431 DeclAccessPair FoundDecl); 3432 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3433 QualType Base, QualType Derived, 3434 const CXXBasePath &Path, 3435 unsigned DiagID, 3436 bool ForceCheck = false, 3437 bool ForceUnprivileged = false); 3438 void CheckLookupAccess(const LookupResult &R); 3439 3440 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3441 const MultiLevelTemplateArgumentList &TemplateArgs); 3442 void PerformDependentDiagnostics(const DeclContext *Pattern, 3443 const MultiLevelTemplateArgumentList &TemplateArgs); 3444 3445 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3446 3447 /// A flag to suppress access checking. 3448 bool SuppressAccessChecking; 3449 3450 /// \brief When true, access checking violations are treated as SFINAE 3451 /// failures rather than hard errors. 3452 bool AccessCheckingSFINAE; 3453 3454 void ActOnStartSuppressingAccessChecks(); 3455 void ActOnStopSuppressingAccessChecks(); 3456 3457 enum AbstractDiagSelID { 3458 AbstractNone = -1, 3459 AbstractReturnType, 3460 AbstractParamType, 3461 AbstractVariableType, 3462 AbstractFieldType, 3463 AbstractArrayType 3464 }; 3465 3466 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3467 const PartialDiagnostic &PD); 3468 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3469 3470 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3471 AbstractDiagSelID SelID = AbstractNone); 3472 3473 //===--------------------------------------------------------------------===// 3474 // C++ Overloaded Operators [C++ 13.5] 3475 // 3476 3477 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3478 3479 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3480 3481 //===--------------------------------------------------------------------===// 3482 // C++ Templates [C++ 14] 3483 // 3484 void FilterAcceptableTemplateNames(LookupResult &R); 3485 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3486 3487 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3488 QualType ObjectType, bool EnteringContext, 3489 bool &MemberOfUnknownSpecialization); 3490 3491 TemplateNameKind isTemplateName(Scope *S, 3492 CXXScopeSpec &SS, 3493 bool hasTemplateKeyword, 3494 UnqualifiedId &Name, 3495 ParsedType ObjectType, 3496 bool EnteringContext, 3497 TemplateTy &Template, 3498 bool &MemberOfUnknownSpecialization); 3499 3500 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3501 SourceLocation IILoc, 3502 Scope *S, 3503 const CXXScopeSpec *SS, 3504 TemplateTy &SuggestedTemplate, 3505 TemplateNameKind &SuggestedKind); 3506 3507 bool DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3508 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3509 3510 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3511 SourceLocation EllipsisLoc, 3512 SourceLocation KeyLoc, 3513 IdentifierInfo *ParamName, 3514 SourceLocation ParamNameLoc, 3515 unsigned Depth, unsigned Position, 3516 SourceLocation EqualLoc, 3517 ParsedType DefaultArg); 3518 3519 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3520 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3521 unsigned Depth, 3522 unsigned Position, 3523 SourceLocation EqualLoc, 3524 Expr *DefaultArg); 3525 Decl *ActOnTemplateTemplateParameter(Scope *S, 3526 SourceLocation TmpLoc, 3527 TemplateParamsTy *Params, 3528 SourceLocation EllipsisLoc, 3529 IdentifierInfo *ParamName, 3530 SourceLocation ParamNameLoc, 3531 unsigned Depth, 3532 unsigned Position, 3533 SourceLocation EqualLoc, 3534 ParsedTemplateArgument DefaultArg); 3535 3536 TemplateParamsTy * 3537 ActOnTemplateParameterList(unsigned Depth, 3538 SourceLocation ExportLoc, 3539 SourceLocation TemplateLoc, 3540 SourceLocation LAngleLoc, 3541 Decl **Params, unsigned NumParams, 3542 SourceLocation RAngleLoc); 3543 3544 /// \brief The context in which we are checking a template parameter 3545 /// list. 3546 enum TemplateParamListContext { 3547 TPC_ClassTemplate, 3548 TPC_FunctionTemplate, 3549 TPC_ClassTemplateMember, 3550 TPC_FriendFunctionTemplate, 3551 TPC_FriendFunctionTemplateDefinition, 3552 TPC_TypeAliasTemplate 3553 }; 3554 3555 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3556 TemplateParameterList *OldParams, 3557 TemplateParamListContext TPC); 3558 TemplateParameterList * 3559 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3560 SourceLocation DeclLoc, 3561 const CXXScopeSpec &SS, 3562 TemplateParameterList **ParamLists, 3563 unsigned NumParamLists, 3564 bool IsFriend, 3565 bool &IsExplicitSpecialization, 3566 bool &Invalid); 3567 3568 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3569 SourceLocation KWLoc, CXXScopeSpec &SS, 3570 IdentifierInfo *Name, SourceLocation NameLoc, 3571 AttributeList *Attr, 3572 TemplateParameterList *TemplateParams, 3573 AccessSpecifier AS, 3574 unsigned NumOuterTemplateParamLists, 3575 TemplateParameterList **OuterTemplateParamLists); 3576 3577 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3578 TemplateArgumentListInfo &Out); 3579 3580 void NoteAllFoundTemplates(TemplateName Name); 3581 3582 QualType CheckTemplateIdType(TemplateName Template, 3583 SourceLocation TemplateLoc, 3584 TemplateArgumentListInfo &TemplateArgs); 3585 3586 TypeResult 3587 ActOnTemplateIdType(CXXScopeSpec &SS, 3588 TemplateTy Template, SourceLocation TemplateLoc, 3589 SourceLocation LAngleLoc, 3590 ASTTemplateArgsPtr TemplateArgs, 3591 SourceLocation RAngleLoc); 3592 3593 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3594 /// such as \c class T::template apply<U>. 3595 /// 3596 /// \param TUK 3597 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3598 TypeSpecifierType TagSpec, 3599 SourceLocation TagLoc, 3600 CXXScopeSpec &SS, 3601 TemplateTy TemplateD, 3602 SourceLocation TemplateLoc, 3603 SourceLocation LAngleLoc, 3604 ASTTemplateArgsPtr TemplateArgsIn, 3605 SourceLocation RAngleLoc); 3606 3607 3608 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3609 LookupResult &R, 3610 bool RequiresADL, 3611 const TemplateArgumentListInfo &TemplateArgs); 3612 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3613 const DeclarationNameInfo &NameInfo, 3614 const TemplateArgumentListInfo &TemplateArgs); 3615 3616 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3617 SourceLocation TemplateKWLoc, 3618 CXXScopeSpec &SS, 3619 UnqualifiedId &Name, 3620 ParsedType ObjectType, 3621 bool EnteringContext, 3622 TemplateTy &Template); 3623 3624 DeclResult 3625 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3626 SourceLocation KWLoc, 3627 CXXScopeSpec &SS, 3628 TemplateTy Template, 3629 SourceLocation TemplateNameLoc, 3630 SourceLocation LAngleLoc, 3631 ASTTemplateArgsPtr TemplateArgs, 3632 SourceLocation RAngleLoc, 3633 AttributeList *Attr, 3634 MultiTemplateParamsArg TemplateParameterLists); 3635 3636 Decl *ActOnTemplateDeclarator(Scope *S, 3637 MultiTemplateParamsArg TemplateParameterLists, 3638 Declarator &D); 3639 3640 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3641 MultiTemplateParamsArg TemplateParameterLists, 3642 Declarator &D); 3643 3644 bool 3645 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3646 TemplateSpecializationKind NewTSK, 3647 NamedDecl *PrevDecl, 3648 TemplateSpecializationKind PrevTSK, 3649 SourceLocation PrevPtOfInstantiation, 3650 bool &SuppressNew); 3651 3652 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3653 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3654 LookupResult &Previous); 3655 3656 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 3657 TemplateArgumentListInfo *ExplicitTemplateArgs, 3658 LookupResult &Previous); 3659 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 3660 3661 DeclResult 3662 ActOnExplicitInstantiation(Scope *S, 3663 SourceLocation ExternLoc, 3664 SourceLocation TemplateLoc, 3665 unsigned TagSpec, 3666 SourceLocation KWLoc, 3667 const CXXScopeSpec &SS, 3668 TemplateTy Template, 3669 SourceLocation TemplateNameLoc, 3670 SourceLocation LAngleLoc, 3671 ASTTemplateArgsPtr TemplateArgs, 3672 SourceLocation RAngleLoc, 3673 AttributeList *Attr); 3674 3675 DeclResult 3676 ActOnExplicitInstantiation(Scope *S, 3677 SourceLocation ExternLoc, 3678 SourceLocation TemplateLoc, 3679 unsigned TagSpec, 3680 SourceLocation KWLoc, 3681 CXXScopeSpec &SS, 3682 IdentifierInfo *Name, 3683 SourceLocation NameLoc, 3684 AttributeList *Attr); 3685 3686 DeclResult ActOnExplicitInstantiation(Scope *S, 3687 SourceLocation ExternLoc, 3688 SourceLocation TemplateLoc, 3689 Declarator &D); 3690 3691 TemplateArgumentLoc 3692 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 3693 SourceLocation TemplateLoc, 3694 SourceLocation RAngleLoc, 3695 Decl *Param, 3696 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3697 3698 /// \brief Specifies the context in which a particular template 3699 /// argument is being checked. 3700 enum CheckTemplateArgumentKind { 3701 /// \brief The template argument was specified in the code or was 3702 /// instantiated with some deduced template arguments. 3703 CTAK_Specified, 3704 3705 /// \brief The template argument was deduced via template argument 3706 /// deduction. 3707 CTAK_Deduced, 3708 3709 /// \brief The template argument was deduced from an array bound 3710 /// via template argument deduction. 3711 CTAK_DeducedFromArrayBound 3712 }; 3713 3714 bool CheckTemplateArgument(NamedDecl *Param, 3715 const TemplateArgumentLoc &Arg, 3716 NamedDecl *Template, 3717 SourceLocation TemplateLoc, 3718 SourceLocation RAngleLoc, 3719 unsigned ArgumentPackIndex, 3720 llvm::SmallVectorImpl<TemplateArgument> &Converted, 3721 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3722 3723 /// \brief Check that the given template arguments can be be provided to 3724 /// the given template, converting the arguments along the way. 3725 /// 3726 /// \param Template The template to which the template arguments are being 3727 /// provided. 3728 /// 3729 /// \param TemplateLoc The location of the template name in the source. 3730 /// 3731 /// \param TemplateArgs The list of template arguments. If the template is 3732 /// a template template parameter, this function may extend the set of 3733 /// template arguments to also include substituted, defaulted template 3734 /// arguments. 3735 /// 3736 /// \param PartialTemplateArgs True if the list of template arguments is 3737 /// intentionally partial, e.g., because we're checking just the initial 3738 /// set of template arguments. 3739 /// 3740 /// \param Converted Will receive the converted, canonicalized template 3741 /// arguments. 3742 /// 3743 /// \returns True if an error occurred, false otherwise. 3744 bool CheckTemplateArgumentList(TemplateDecl *Template, 3745 SourceLocation TemplateLoc, 3746 TemplateArgumentListInfo &TemplateArgs, 3747 bool PartialTemplateArgs, 3748 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3749 3750 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 3751 const TemplateArgumentLoc &Arg, 3752 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3753 3754 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 3755 TypeSourceInfo *Arg); 3756 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 3757 TemplateArgument &Converted); 3758 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 3759 QualType InstantiatedParamType, Expr *Arg, 3760 TemplateArgument &Converted, 3761 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3762 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 3763 const TemplateArgumentLoc &Arg); 3764 3765 ExprResult 3766 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 3767 QualType ParamType, 3768 SourceLocation Loc); 3769 ExprResult 3770 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 3771 SourceLocation Loc); 3772 3773 /// \brief Enumeration describing how template parameter lists are compared 3774 /// for equality. 3775 enum TemplateParameterListEqualKind { 3776 /// \brief We are matching the template parameter lists of two templates 3777 /// that might be redeclarations. 3778 /// 3779 /// \code 3780 /// template<typename T> struct X; 3781 /// template<typename T> struct X; 3782 /// \endcode 3783 TPL_TemplateMatch, 3784 3785 /// \brief We are matching the template parameter lists of two template 3786 /// template parameters as part of matching the template parameter lists 3787 /// of two templates that might be redeclarations. 3788 /// 3789 /// \code 3790 /// template<template<int I> class TT> struct X; 3791 /// template<template<int Value> class Other> struct X; 3792 /// \endcode 3793 TPL_TemplateTemplateParmMatch, 3794 3795 /// \brief We are matching the template parameter lists of a template 3796 /// template argument against the template parameter lists of a template 3797 /// template parameter. 3798 /// 3799 /// \code 3800 /// template<template<int Value> class Metafun> struct X; 3801 /// template<int Value> struct integer_c; 3802 /// X<integer_c> xic; 3803 /// \endcode 3804 TPL_TemplateTemplateArgumentMatch 3805 }; 3806 3807 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 3808 TemplateParameterList *Old, 3809 bool Complain, 3810 TemplateParameterListEqualKind Kind, 3811 SourceLocation TemplateArgLoc 3812 = SourceLocation()); 3813 3814 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 3815 3816 /// \brief Called when the parser has parsed a C++ typename 3817 /// specifier, e.g., "typename T::type". 3818 /// 3819 /// \param S The scope in which this typename type occurs. 3820 /// \param TypenameLoc the location of the 'typename' keyword 3821 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3822 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 3823 /// \param IdLoc the location of the identifier. 3824 TypeResult 3825 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3826 const CXXScopeSpec &SS, const IdentifierInfo &II, 3827 SourceLocation IdLoc); 3828 3829 /// \brief Called when the parser has parsed a C++ typename 3830 /// specifier that ends in a template-id, e.g., 3831 /// "typename MetaFun::template apply<T1, T2>". 3832 /// 3833 /// \param S The scope in which this typename type occurs. 3834 /// \param TypenameLoc the location of the 'typename' keyword 3835 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3836 /// \param TemplateLoc the location of the 'template' keyword, if any. 3837 /// \param TemplateName The template name. 3838 /// \param TemplateNameLoc The location of the template name. 3839 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3840 /// \param TemplateArgs The template arguments. 3841 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3842 TypeResult 3843 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3844 const CXXScopeSpec &SS, 3845 SourceLocation TemplateLoc, 3846 TemplateTy Template, 3847 SourceLocation TemplateNameLoc, 3848 SourceLocation LAngleLoc, 3849 ASTTemplateArgsPtr TemplateArgs, 3850 SourceLocation RAngleLoc); 3851 3852 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 3853 SourceLocation KeywordLoc, 3854 NestedNameSpecifierLoc QualifierLoc, 3855 const IdentifierInfo &II, 3856 SourceLocation IILoc); 3857 3858 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 3859 SourceLocation Loc, 3860 DeclarationName Name); 3861 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 3862 3863 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 3864 3865 std::string 3866 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3867 const TemplateArgumentList &Args); 3868 3869 std::string 3870 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3871 const TemplateArgument *Args, 3872 unsigned NumArgs); 3873 3874 //===--------------------------------------------------------------------===// 3875 // C++ Variadic Templates (C++0x [temp.variadic]) 3876 //===--------------------------------------------------------------------===// 3877 3878 /// \brief The context in which an unexpanded parameter pack is 3879 /// being diagnosed. 3880 /// 3881 /// Note that the values of this enumeration line up with the first 3882 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 3883 enum UnexpandedParameterPackContext { 3884 /// \brief An arbitrary expression. 3885 UPPC_Expression = 0, 3886 3887 /// \brief The base type of a class type. 3888 UPPC_BaseType, 3889 3890 /// \brief The type of an arbitrary declaration. 3891 UPPC_DeclarationType, 3892 3893 /// \brief The type of a data member. 3894 UPPC_DataMemberType, 3895 3896 /// \brief The size of a bit-field. 3897 UPPC_BitFieldWidth, 3898 3899 /// \brief The expression in a static assertion. 3900 UPPC_StaticAssertExpression, 3901 3902 /// \brief The fixed underlying type of an enumeration. 3903 UPPC_FixedUnderlyingType, 3904 3905 /// \brief The enumerator value. 3906 UPPC_EnumeratorValue, 3907 3908 /// \brief A using declaration. 3909 UPPC_UsingDeclaration, 3910 3911 /// \brief A friend declaration. 3912 UPPC_FriendDeclaration, 3913 3914 /// \brief A declaration qualifier. 3915 UPPC_DeclarationQualifier, 3916 3917 /// \brief An initializer. 3918 UPPC_Initializer, 3919 3920 /// \brief A default argument. 3921 UPPC_DefaultArgument, 3922 3923 /// \brief The type of a non-type template parameter. 3924 UPPC_NonTypeTemplateParameterType, 3925 3926 /// \brief The type of an exception. 3927 UPPC_ExceptionType, 3928 3929 /// \brief Partial specialization. 3930 UPPC_PartialSpecialization 3931 }; 3932 3933 /// \brief If the given type contains an unexpanded parameter pack, 3934 /// diagnose the error. 3935 /// 3936 /// \param Loc The source location where a diagnostc should be emitted. 3937 /// 3938 /// \param T The type that is being checked for unexpanded parameter 3939 /// packs. 3940 /// 3941 /// \returns true if an error occurred, false otherwise. 3942 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 3943 UnexpandedParameterPackContext UPPC); 3944 3945 /// \brief If the given expression contains an unexpanded parameter 3946 /// pack, diagnose the error. 3947 /// 3948 /// \param E The expression that is being checked for unexpanded 3949 /// parameter packs. 3950 /// 3951 /// \returns true if an error occurred, false otherwise. 3952 bool DiagnoseUnexpandedParameterPack(Expr *E, 3953 UnexpandedParameterPackContext UPPC = UPPC_Expression); 3954 3955 /// \brief If the given nested-name-specifier contains an unexpanded 3956 /// parameter pack, diagnose the error. 3957 /// 3958 /// \param SS The nested-name-specifier that is being checked for 3959 /// unexpanded parameter packs. 3960 /// 3961 /// \returns true if an error occurred, false otherwise. 3962 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 3963 UnexpandedParameterPackContext UPPC); 3964 3965 /// \brief If the given name contains an unexpanded parameter pack, 3966 /// diagnose the error. 3967 /// 3968 /// \param NameInfo The name (with source location information) that 3969 /// is being checked for unexpanded parameter packs. 3970 /// 3971 /// \returns true if an error occurred, false otherwise. 3972 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 3973 UnexpandedParameterPackContext UPPC); 3974 3975 /// \brief If the given template name contains an unexpanded parameter pack, 3976 /// diagnose the error. 3977 /// 3978 /// \param Loc The location of the template name. 3979 /// 3980 /// \param Template The template name that is being checked for unexpanded 3981 /// parameter packs. 3982 /// 3983 /// \returns true if an error occurred, false otherwise. 3984 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 3985 TemplateName Template, 3986 UnexpandedParameterPackContext UPPC); 3987 3988 /// \brief If the given template argument contains an unexpanded parameter 3989 /// pack, diagnose the error. 3990 /// 3991 /// \param Arg The template argument that is being checked for unexpanded 3992 /// parameter packs. 3993 /// 3994 /// \returns true if an error occurred, false otherwise. 3995 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 3996 UnexpandedParameterPackContext UPPC); 3997 3998 /// \brief Collect the set of unexpanded parameter packs within the given 3999 /// template argument. 4000 /// 4001 /// \param Arg The template argument that will be traversed to find 4002 /// unexpanded parameter packs. 4003 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4004 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4005 4006 /// \brief Collect the set of unexpanded parameter packs within the given 4007 /// template argument. 4008 /// 4009 /// \param Arg The template argument that will be traversed to find 4010 /// unexpanded parameter packs. 4011 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4012 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4013 4014 /// \brief Collect the set of unexpanded parameter packs within the given 4015 /// type. 4016 /// 4017 /// \param T The type that will be traversed to find 4018 /// unexpanded parameter packs. 4019 void collectUnexpandedParameterPacks(QualType T, 4020 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4021 4022 /// \brief Collect the set of unexpanded parameter packs within the given 4023 /// type. 4024 /// 4025 /// \param TL The type that will be traversed to find 4026 /// unexpanded parameter packs. 4027 void collectUnexpandedParameterPacks(TypeLoc TL, 4028 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4029 4030 /// \brief Invoked when parsing a template argument followed by an 4031 /// ellipsis, which creates a pack expansion. 4032 /// 4033 /// \param Arg The template argument preceding the ellipsis, which 4034 /// may already be invalid. 4035 /// 4036 /// \param EllipsisLoc The location of the ellipsis. 4037 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4038 SourceLocation EllipsisLoc); 4039 4040 /// \brief Invoked when parsing a type followed by an ellipsis, which 4041 /// creates a pack expansion. 4042 /// 4043 /// \param Type The type preceding the ellipsis, which will become 4044 /// the pattern of the pack expansion. 4045 /// 4046 /// \param EllipsisLoc The location of the ellipsis. 4047 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4048 4049 /// \brief Construct a pack expansion type from the pattern of the pack 4050 /// expansion. 4051 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4052 SourceLocation EllipsisLoc, 4053 llvm::Optional<unsigned> NumExpansions); 4054 4055 /// \brief Construct a pack expansion type from the pattern of the pack 4056 /// expansion. 4057 QualType CheckPackExpansion(QualType Pattern, 4058 SourceRange PatternRange, 4059 SourceLocation EllipsisLoc, 4060 llvm::Optional<unsigned> NumExpansions); 4061 4062 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4063 /// creates a pack expansion. 4064 /// 4065 /// \param Pattern The expression preceding the ellipsis, which will become 4066 /// the pattern of the pack expansion. 4067 /// 4068 /// \param EllipsisLoc The location of the ellipsis. 4069 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4070 4071 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4072 /// creates a pack expansion. 4073 /// 4074 /// \param Pattern The expression preceding the ellipsis, which will become 4075 /// the pattern of the pack expansion. 4076 /// 4077 /// \param EllipsisLoc The location of the ellipsis. 4078 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4079 llvm::Optional<unsigned> NumExpansions); 4080 4081 /// \brief Determine whether we could expand a pack expansion with the 4082 /// given set of parameter packs into separate arguments by repeatedly 4083 /// transforming the pattern. 4084 /// 4085 /// \param EllipsisLoc The location of the ellipsis that identifies the 4086 /// pack expansion. 4087 /// 4088 /// \param PatternRange The source range that covers the entire pattern of 4089 /// the pack expansion. 4090 /// 4091 /// \param Unexpanded The set of unexpanded parameter packs within the 4092 /// pattern. 4093 /// 4094 /// \param NumUnexpanded The number of unexpanded parameter packs in 4095 /// \p Unexpanded. 4096 /// 4097 /// \param ShouldExpand Will be set to \c true if the transformer should 4098 /// expand the corresponding pack expansions into separate arguments. When 4099 /// set, \c NumExpansions must also be set. 4100 /// 4101 /// \param RetainExpansion Whether the caller should add an unexpanded 4102 /// pack expansion after all of the expanded arguments. This is used 4103 /// when extending explicitly-specified template argument packs per 4104 /// C++0x [temp.arg.explicit]p9. 4105 /// 4106 /// \param NumExpansions The number of separate arguments that will be in 4107 /// the expanded form of the corresponding pack expansion. This is both an 4108 /// input and an output parameter, which can be set by the caller if the 4109 /// number of expansions is known a priori (e.g., due to a prior substitution) 4110 /// and will be set by the callee when the number of expansions is known. 4111 /// The callee must set this value when \c ShouldExpand is \c true; it may 4112 /// set this value in other cases. 4113 /// 4114 /// \returns true if an error occurred (e.g., because the parameter packs 4115 /// are to be instantiated with arguments of different lengths), false 4116 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4117 /// must be set. 4118 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4119 SourceRange PatternRange, 4120 const UnexpandedParameterPack *Unexpanded, 4121 unsigned NumUnexpanded, 4122 const MultiLevelTemplateArgumentList &TemplateArgs, 4123 bool &ShouldExpand, 4124 bool &RetainExpansion, 4125 llvm::Optional<unsigned> &NumExpansions); 4126 4127 /// \brief Determine the number of arguments in the given pack expansion 4128 /// type. 4129 /// 4130 /// This routine already assumes that the pack expansion type can be 4131 /// expanded and that the number of arguments in the expansion is 4132 /// consistent across all of the unexpanded parameter packs in its pattern. 4133 unsigned getNumArgumentsInExpansion(QualType T, 4134 const MultiLevelTemplateArgumentList &TemplateArgs); 4135 4136 /// \brief Determine whether the given declarator contains any unexpanded 4137 /// parameter packs. 4138 /// 4139 /// This routine is used by the parser to disambiguate function declarators 4140 /// with an ellipsis prior to the ')', e.g., 4141 /// 4142 /// \code 4143 /// void f(T...); 4144 /// \endcode 4145 /// 4146 /// To determine whether we have an (unnamed) function parameter pack or 4147 /// a variadic function. 4148 /// 4149 /// \returns true if the declarator contains any unexpanded parameter packs, 4150 /// false otherwise. 4151 bool containsUnexpandedParameterPacks(Declarator &D); 4152 4153 //===--------------------------------------------------------------------===// 4154 // C++ Template Argument Deduction (C++ [temp.deduct]) 4155 //===--------------------------------------------------------------------===// 4156 4157 /// \brief Describes the result of template argument deduction. 4158 /// 4159 /// The TemplateDeductionResult enumeration describes the result of 4160 /// template argument deduction, as returned from 4161 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4162 /// structure provides additional information about the results of 4163 /// template argument deduction, e.g., the deduced template argument 4164 /// list (if successful) or the specific template parameters or 4165 /// deduced arguments that were involved in the failure. 4166 enum TemplateDeductionResult { 4167 /// \brief Template argument deduction was successful. 4168 TDK_Success = 0, 4169 /// \brief Template argument deduction exceeded the maximum template 4170 /// instantiation depth (which has already been diagnosed). 4171 TDK_InstantiationDepth, 4172 /// \brief Template argument deduction did not deduce a value 4173 /// for every template parameter. 4174 TDK_Incomplete, 4175 /// \brief Template argument deduction produced inconsistent 4176 /// deduced values for the given template parameter. 4177 TDK_Inconsistent, 4178 /// \brief Template argument deduction failed due to inconsistent 4179 /// cv-qualifiers on a template parameter type that would 4180 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4181 /// but were given a non-const "X". 4182 TDK_Underqualified, 4183 /// \brief Substitution of the deduced template argument values 4184 /// resulted in an error. 4185 TDK_SubstitutionFailure, 4186 /// \brief Substitution of the deduced template argument values 4187 /// into a non-deduced context produced a type or value that 4188 /// produces a type that does not match the original template 4189 /// arguments provided. 4190 TDK_NonDeducedMismatch, 4191 /// \brief When performing template argument deduction for a function 4192 /// template, there were too many call arguments. 4193 TDK_TooManyArguments, 4194 /// \brief When performing template argument deduction for a function 4195 /// template, there were too few call arguments. 4196 TDK_TooFewArguments, 4197 /// \brief The explicitly-specified template arguments were not valid 4198 /// template arguments for the given template. 4199 TDK_InvalidExplicitArguments, 4200 /// \brief The arguments included an overloaded function name that could 4201 /// not be resolved to a suitable function. 4202 TDK_FailedOverloadResolution 4203 }; 4204 4205 TemplateDeductionResult 4206 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4207 const TemplateArgumentList &TemplateArgs, 4208 sema::TemplateDeductionInfo &Info); 4209 4210 TemplateDeductionResult 4211 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4212 TemplateArgumentListInfo &ExplicitTemplateArgs, 4213 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4214 llvm::SmallVectorImpl<QualType> &ParamTypes, 4215 QualType *FunctionType, 4216 sema::TemplateDeductionInfo &Info); 4217 4218 TemplateDeductionResult 4219 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4220 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4221 unsigned NumExplicitlySpecified, 4222 FunctionDecl *&Specialization, 4223 sema::TemplateDeductionInfo &Info); 4224 4225 TemplateDeductionResult 4226 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4227 TemplateArgumentListInfo *ExplicitTemplateArgs, 4228 Expr **Args, unsigned NumArgs, 4229 FunctionDecl *&Specialization, 4230 sema::TemplateDeductionInfo &Info); 4231 4232 TemplateDeductionResult 4233 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4234 TemplateArgumentListInfo *ExplicitTemplateArgs, 4235 QualType ArgFunctionType, 4236 FunctionDecl *&Specialization, 4237 sema::TemplateDeductionInfo &Info); 4238 4239 TemplateDeductionResult 4240 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4241 QualType ToType, 4242 CXXConversionDecl *&Specialization, 4243 sema::TemplateDeductionInfo &Info); 4244 4245 TemplateDeductionResult 4246 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4247 TemplateArgumentListInfo *ExplicitTemplateArgs, 4248 FunctionDecl *&Specialization, 4249 sema::TemplateDeductionInfo &Info); 4250 4251 bool DeduceAutoType(TypeSourceInfo *AutoType, Expr *Initializer, 4252 TypeSourceInfo *&Result); 4253 4254 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4255 FunctionTemplateDecl *FT2, 4256 SourceLocation Loc, 4257 TemplatePartialOrderingContext TPOC, 4258 unsigned NumCallArguments); 4259 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4260 UnresolvedSetIterator SEnd, 4261 TemplatePartialOrderingContext TPOC, 4262 unsigned NumCallArguments, 4263 SourceLocation Loc, 4264 const PartialDiagnostic &NoneDiag, 4265 const PartialDiagnostic &AmbigDiag, 4266 const PartialDiagnostic &CandidateDiag, 4267 bool Complain = true); 4268 4269 ClassTemplatePartialSpecializationDecl * 4270 getMoreSpecializedPartialSpecialization( 4271 ClassTemplatePartialSpecializationDecl *PS1, 4272 ClassTemplatePartialSpecializationDecl *PS2, 4273 SourceLocation Loc); 4274 4275 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4276 bool OnlyDeduced, 4277 unsigned Depth, 4278 llvm::SmallVectorImpl<bool> &Used); 4279 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4280 llvm::SmallVectorImpl<bool> &Deduced); 4281 4282 //===--------------------------------------------------------------------===// 4283 // C++ Template Instantiation 4284 // 4285 4286 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4287 const TemplateArgumentList *Innermost = 0, 4288 bool RelativeToPrimary = false, 4289 const FunctionDecl *Pattern = 0); 4290 4291 /// \brief A template instantiation that is currently in progress. 4292 struct ActiveTemplateInstantiation { 4293 /// \brief The kind of template instantiation we are performing 4294 enum InstantiationKind { 4295 /// We are instantiating a template declaration. The entity is 4296 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4297 TemplateInstantiation, 4298 4299 /// We are instantiating a default argument for a template 4300 /// parameter. The Entity is the template, and 4301 /// TemplateArgs/NumTemplateArguments provides the template 4302 /// arguments as specified. 4303 /// FIXME: Use a TemplateArgumentList 4304 DefaultTemplateArgumentInstantiation, 4305 4306 /// We are instantiating a default argument for a function. 4307 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4308 /// provides the template arguments as specified. 4309 DefaultFunctionArgumentInstantiation, 4310 4311 /// We are substituting explicit template arguments provided for 4312 /// a function template. The entity is a FunctionTemplateDecl. 4313 ExplicitTemplateArgumentSubstitution, 4314 4315 /// We are substituting template argument determined as part of 4316 /// template argument deduction for either a class template 4317 /// partial specialization or a function template. The 4318 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4319 /// a FunctionTemplateDecl. 4320 DeducedTemplateArgumentSubstitution, 4321 4322 /// We are substituting prior template arguments into a new 4323 /// template parameter. The template parameter itself is either a 4324 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4325 PriorTemplateArgumentSubstitution, 4326 4327 /// We are checking the validity of a default template argument that 4328 /// has been used when naming a template-id. 4329 DefaultTemplateArgumentChecking 4330 } Kind; 4331 4332 /// \brief The point of instantiation within the source code. 4333 SourceLocation PointOfInstantiation; 4334 4335 /// \brief The template (or partial specialization) in which we are 4336 /// performing the instantiation, for substitutions of prior template 4337 /// arguments. 4338 NamedDecl *Template; 4339 4340 /// \brief The entity that is being instantiated. 4341 uintptr_t Entity; 4342 4343 /// \brief The list of template arguments we are substituting, if they 4344 /// are not part of the entity. 4345 const TemplateArgument *TemplateArgs; 4346 4347 /// \brief The number of template arguments in TemplateArgs. 4348 unsigned NumTemplateArgs; 4349 4350 /// \brief The template deduction info object associated with the 4351 /// substitution or checking of explicit or deduced template arguments. 4352 sema::TemplateDeductionInfo *DeductionInfo; 4353 4354 /// \brief The source range that covers the construct that cause 4355 /// the instantiation, e.g., the template-id that causes a class 4356 /// template instantiation. 4357 SourceRange InstantiationRange; 4358 4359 ActiveTemplateInstantiation() 4360 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4361 NumTemplateArgs(0), DeductionInfo(0) {} 4362 4363 /// \brief Determines whether this template is an actual instantiation 4364 /// that should be counted toward the maximum instantiation depth. 4365 bool isInstantiationRecord() const; 4366 4367 friend bool operator==(const ActiveTemplateInstantiation &X, 4368 const ActiveTemplateInstantiation &Y) { 4369 if (X.Kind != Y.Kind) 4370 return false; 4371 4372 if (X.Entity != Y.Entity) 4373 return false; 4374 4375 switch (X.Kind) { 4376 case TemplateInstantiation: 4377 return true; 4378 4379 case PriorTemplateArgumentSubstitution: 4380 case DefaultTemplateArgumentChecking: 4381 if (X.Template != Y.Template) 4382 return false; 4383 4384 // Fall through 4385 4386 case DefaultTemplateArgumentInstantiation: 4387 case ExplicitTemplateArgumentSubstitution: 4388 case DeducedTemplateArgumentSubstitution: 4389 case DefaultFunctionArgumentInstantiation: 4390 return X.TemplateArgs == Y.TemplateArgs; 4391 4392 } 4393 4394 return true; 4395 } 4396 4397 friend bool operator!=(const ActiveTemplateInstantiation &X, 4398 const ActiveTemplateInstantiation &Y) { 4399 return !(X == Y); 4400 } 4401 }; 4402 4403 /// \brief List of active template instantiations. 4404 /// 4405 /// This vector is treated as a stack. As one template instantiation 4406 /// requires another template instantiation, additional 4407 /// instantiations are pushed onto the stack up to a 4408 /// user-configurable limit LangOptions::InstantiationDepth. 4409 llvm::SmallVector<ActiveTemplateInstantiation, 16> 4410 ActiveTemplateInstantiations; 4411 4412 /// \brief Whether we are in a SFINAE context that is not associated with 4413 /// template instantiation. 4414 /// 4415 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4416 /// of a template instantiation or template argument deduction. 4417 bool InNonInstantiationSFINAEContext; 4418 4419 /// \brief The number of ActiveTemplateInstantiation entries in 4420 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4421 /// therefore, should not be counted as part of the instantiation depth. 4422 unsigned NonInstantiationEntries; 4423 4424 /// \brief The last template from which a template instantiation 4425 /// error or warning was produced. 4426 /// 4427 /// This value is used to suppress printing of redundant template 4428 /// instantiation backtraces when there are multiple errors in the 4429 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4430 /// to implement it anywhere else. 4431 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4432 4433 /// \brief The current index into pack expansion arguments that will be 4434 /// used for substitution of parameter packs. 4435 /// 4436 /// The pack expansion index will be -1 to indicate that parameter packs 4437 /// should be instantiated as themselves. Otherwise, the index specifies 4438 /// which argument within the parameter pack will be used for substitution. 4439 int ArgumentPackSubstitutionIndex; 4440 4441 /// \brief RAII object used to change the argument pack substitution index 4442 /// within a \c Sema object. 4443 /// 4444 /// See \c ArgumentPackSubstitutionIndex for more information. 4445 class ArgumentPackSubstitutionIndexRAII { 4446 Sema &Self; 4447 int OldSubstitutionIndex; 4448 4449 public: 4450 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4451 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4452 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4453 } 4454 4455 ~ArgumentPackSubstitutionIndexRAII() { 4456 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4457 } 4458 }; 4459 4460 friend class ArgumentPackSubstitutionRAII; 4461 4462 /// \brief The stack of calls expression undergoing template instantiation. 4463 /// 4464 /// The top of this stack is used by a fixit instantiating unresolved 4465 /// function calls to fix the AST to match the textual change it prints. 4466 llvm::SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4467 4468 /// \brief For each declaration that involved template argument deduction, the 4469 /// set of diagnostics that were suppressed during that template argument 4470 /// deduction. 4471 /// 4472 /// FIXME: Serialize this structure to the AST file. 4473 llvm::DenseMap<Decl *, llvm::SmallVector<PartialDiagnosticAt, 1> > 4474 SuppressedDiagnostics; 4475 4476 /// \brief A stack object to be created when performing template 4477 /// instantiation. 4478 /// 4479 /// Construction of an object of type \c InstantiatingTemplate 4480 /// pushes the current instantiation onto the stack of active 4481 /// instantiations. If the size of this stack exceeds the maximum 4482 /// number of recursive template instantiations, construction 4483 /// produces an error and evaluates true. 4484 /// 4485 /// Destruction of this object will pop the named instantiation off 4486 /// the stack. 4487 struct InstantiatingTemplate { 4488 /// \brief Note that we are instantiating a class template, 4489 /// function template, or a member thereof. 4490 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4491 Decl *Entity, 4492 SourceRange InstantiationRange = SourceRange()); 4493 4494 /// \brief Note that we are instantiating a default argument in a 4495 /// template-id. 4496 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4497 TemplateDecl *Template, 4498 const TemplateArgument *TemplateArgs, 4499 unsigned NumTemplateArgs, 4500 SourceRange InstantiationRange = SourceRange()); 4501 4502 /// \brief Note that we are instantiating a default argument in a 4503 /// template-id. 4504 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4505 FunctionTemplateDecl *FunctionTemplate, 4506 const TemplateArgument *TemplateArgs, 4507 unsigned NumTemplateArgs, 4508 ActiveTemplateInstantiation::InstantiationKind Kind, 4509 sema::TemplateDeductionInfo &DeductionInfo, 4510 SourceRange InstantiationRange = SourceRange()); 4511 4512 /// \brief Note that we are instantiating as part of template 4513 /// argument deduction for a class template partial 4514 /// specialization. 4515 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4516 ClassTemplatePartialSpecializationDecl *PartialSpec, 4517 const TemplateArgument *TemplateArgs, 4518 unsigned NumTemplateArgs, 4519 sema::TemplateDeductionInfo &DeductionInfo, 4520 SourceRange InstantiationRange = SourceRange()); 4521 4522 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4523 ParmVarDecl *Param, 4524 const TemplateArgument *TemplateArgs, 4525 unsigned NumTemplateArgs, 4526 SourceRange InstantiationRange = SourceRange()); 4527 4528 /// \brief Note that we are substituting prior template arguments into a 4529 /// non-type or template template parameter. 4530 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4531 NamedDecl *Template, 4532 NonTypeTemplateParmDecl *Param, 4533 const TemplateArgument *TemplateArgs, 4534 unsigned NumTemplateArgs, 4535 SourceRange InstantiationRange); 4536 4537 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4538 NamedDecl *Template, 4539 TemplateTemplateParmDecl *Param, 4540 const TemplateArgument *TemplateArgs, 4541 unsigned NumTemplateArgs, 4542 SourceRange InstantiationRange); 4543 4544 /// \brief Note that we are checking the default template argument 4545 /// against the template parameter for a given template-id. 4546 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4547 TemplateDecl *Template, 4548 NamedDecl *Param, 4549 const TemplateArgument *TemplateArgs, 4550 unsigned NumTemplateArgs, 4551 SourceRange InstantiationRange); 4552 4553 4554 /// \brief Note that we have finished instantiating this template. 4555 void Clear(); 4556 4557 ~InstantiatingTemplate() { Clear(); } 4558 4559 /// \brief Determines whether we have exceeded the maximum 4560 /// recursive template instantiations. 4561 operator bool() const { return Invalid; } 4562 4563 private: 4564 Sema &SemaRef; 4565 bool Invalid; 4566 bool SavedInNonInstantiationSFINAEContext; 4567 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4568 SourceRange InstantiationRange); 4569 4570 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4571 4572 InstantiatingTemplate& 4573 operator=(const InstantiatingTemplate&); // not implemented 4574 }; 4575 4576 void PrintInstantiationStack(); 4577 4578 /// \brief Determines whether we are currently in a context where 4579 /// template argument substitution failures are not considered 4580 /// errors. 4581 /// 4582 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4583 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4584 /// template-deduction context object, which can be used to capture 4585 /// diagnostics that will be suppressed. 4586 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4587 4588 /// \brief RAII class used to determine whether SFINAE has 4589 /// trapped any errors that occur during template argument 4590 /// deduction.` 4591 class SFINAETrap { 4592 Sema &SemaRef; 4593 unsigned PrevSFINAEErrors; 4594 bool PrevInNonInstantiationSFINAEContext; 4595 bool PrevAccessCheckingSFINAE; 4596 4597 public: 4598 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 4599 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 4600 PrevInNonInstantiationSFINAEContext( 4601 SemaRef.InNonInstantiationSFINAEContext), 4602 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 4603 { 4604 if (!SemaRef.isSFINAEContext()) 4605 SemaRef.InNonInstantiationSFINAEContext = true; 4606 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 4607 } 4608 4609 ~SFINAETrap() { 4610 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 4611 SemaRef.InNonInstantiationSFINAEContext 4612 = PrevInNonInstantiationSFINAEContext; 4613 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 4614 } 4615 4616 /// \brief Determine whether any SFINAE errors have been trapped. 4617 bool hasErrorOccurred() const { 4618 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 4619 } 4620 }; 4621 4622 /// \brief The current instantiation scope used to store local 4623 /// variables. 4624 LocalInstantiationScope *CurrentInstantiationScope; 4625 4626 /// \brief The number of typos corrected by CorrectTypo. 4627 unsigned TyposCorrected; 4628 4629 typedef llvm::DenseMap<IdentifierInfo *, std::pair<llvm::StringRef, bool> > 4630 UnqualifiedTyposCorrectedMap; 4631 4632 /// \brief A cache containing the results of typo correction for unqualified 4633 /// name lookup. 4634 /// 4635 /// The string is the string that we corrected to (which may be empty, if 4636 /// there was no correction), while the boolean will be true when the 4637 /// string represents a keyword. 4638 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 4639 4640 /// \brief Worker object for performing CFG-based warnings. 4641 sema::AnalysisBasedWarnings AnalysisWarnings; 4642 4643 /// \brief An entity for which implicit template instantiation is required. 4644 /// 4645 /// The source location associated with the declaration is the first place in 4646 /// the source code where the declaration was "used". It is not necessarily 4647 /// the point of instantiation (which will be either before or after the 4648 /// namespace-scope declaration that triggered this implicit instantiation), 4649 /// However, it is the location that diagnostics should generally refer to, 4650 /// because users will need to know what code triggered the instantiation. 4651 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 4652 4653 /// \brief The queue of implicit template instantiations that are required 4654 /// but have not yet been performed. 4655 std::deque<PendingImplicitInstantiation> PendingInstantiations; 4656 4657 /// \brief The queue of implicit template instantiations that are required 4658 /// and must be performed within the current local scope. 4659 /// 4660 /// This queue is only used for member functions of local classes in 4661 /// templates, which must be instantiated in the same scope as their 4662 /// enclosing function, so that they can reference function-local 4663 /// types, static variables, enumerators, etc. 4664 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 4665 4666 void PerformPendingInstantiations(bool LocalOnly = false); 4667 4668 TypeSourceInfo *SubstType(TypeSourceInfo *T, 4669 const MultiLevelTemplateArgumentList &TemplateArgs, 4670 SourceLocation Loc, DeclarationName Entity); 4671 4672 QualType SubstType(QualType T, 4673 const MultiLevelTemplateArgumentList &TemplateArgs, 4674 SourceLocation Loc, DeclarationName Entity); 4675 4676 TypeSourceInfo *SubstType(TypeLoc TL, 4677 const MultiLevelTemplateArgumentList &TemplateArgs, 4678 SourceLocation Loc, DeclarationName Entity); 4679 4680 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 4681 const MultiLevelTemplateArgumentList &TemplateArgs, 4682 SourceLocation Loc, 4683 DeclarationName Entity); 4684 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 4685 const MultiLevelTemplateArgumentList &TemplateArgs, 4686 int indexAdjustment, 4687 llvm::Optional<unsigned> NumExpansions); 4688 bool SubstParmTypes(SourceLocation Loc, 4689 ParmVarDecl **Params, unsigned NumParams, 4690 const MultiLevelTemplateArgumentList &TemplateArgs, 4691 llvm::SmallVectorImpl<QualType> &ParamTypes, 4692 llvm::SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 4693 ExprResult SubstExpr(Expr *E, 4694 const MultiLevelTemplateArgumentList &TemplateArgs); 4695 4696 /// \brief Substitute the given template arguments into a list of 4697 /// expressions, expanding pack expansions if required. 4698 /// 4699 /// \param Exprs The list of expressions to substitute into. 4700 /// 4701 /// \param NumExprs The number of expressions in \p Exprs. 4702 /// 4703 /// \param IsCall Whether this is some form of call, in which case 4704 /// default arguments will be dropped. 4705 /// 4706 /// \param TemplateArgs The set of template arguments to substitute. 4707 /// 4708 /// \param Outputs Will receive all of the substituted arguments. 4709 /// 4710 /// \returns true if an error occurred, false otherwise. 4711 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 4712 const MultiLevelTemplateArgumentList &TemplateArgs, 4713 llvm::SmallVectorImpl<Expr *> &Outputs); 4714 4715 StmtResult SubstStmt(Stmt *S, 4716 const MultiLevelTemplateArgumentList &TemplateArgs); 4717 4718 Decl *SubstDecl(Decl *D, DeclContext *Owner, 4719 const MultiLevelTemplateArgumentList &TemplateArgs); 4720 4721 bool 4722 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 4723 CXXRecordDecl *Pattern, 4724 const MultiLevelTemplateArgumentList &TemplateArgs); 4725 4726 bool 4727 InstantiateClass(SourceLocation PointOfInstantiation, 4728 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 4729 const MultiLevelTemplateArgumentList &TemplateArgs, 4730 TemplateSpecializationKind TSK, 4731 bool Complain = true); 4732 4733 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 4734 Decl *Pattern, Decl *Inst); 4735 4736 bool 4737 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 4738 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4739 TemplateSpecializationKind TSK, 4740 bool Complain = true); 4741 4742 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 4743 CXXRecordDecl *Instantiation, 4744 const MultiLevelTemplateArgumentList &TemplateArgs, 4745 TemplateSpecializationKind TSK); 4746 4747 void InstantiateClassTemplateSpecializationMembers( 4748 SourceLocation PointOfInstantiation, 4749 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4750 TemplateSpecializationKind TSK); 4751 4752 NestedNameSpecifierLoc 4753 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 4754 const MultiLevelTemplateArgumentList &TemplateArgs); 4755 4756 DeclarationNameInfo 4757 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 4758 const MultiLevelTemplateArgumentList &TemplateArgs); 4759 TemplateName 4760 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 4761 SourceLocation Loc, 4762 const MultiLevelTemplateArgumentList &TemplateArgs); 4763 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 4764 TemplateArgumentListInfo &Result, 4765 const MultiLevelTemplateArgumentList &TemplateArgs); 4766 4767 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 4768 FunctionDecl *Function, 4769 bool Recursive = false, 4770 bool DefinitionRequired = false); 4771 void InstantiateStaticDataMemberDefinition( 4772 SourceLocation PointOfInstantiation, 4773 VarDecl *Var, 4774 bool Recursive = false, 4775 bool DefinitionRequired = false); 4776 4777 void InstantiateMemInitializers(CXXConstructorDecl *New, 4778 const CXXConstructorDecl *Tmpl, 4779 const MultiLevelTemplateArgumentList &TemplateArgs); 4780 4781 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 4782 const MultiLevelTemplateArgumentList &TemplateArgs); 4783 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 4784 const MultiLevelTemplateArgumentList &TemplateArgs); 4785 4786 // Objective-C declarations. 4787 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 4788 IdentifierInfo *ClassName, 4789 SourceLocation ClassLoc, 4790 IdentifierInfo *SuperName, 4791 SourceLocation SuperLoc, 4792 Decl * const *ProtoRefs, 4793 unsigned NumProtoRefs, 4794 const SourceLocation *ProtoLocs, 4795 SourceLocation EndProtoLoc, 4796 AttributeList *AttrList); 4797 4798 Decl *ActOnCompatiblityAlias( 4799 SourceLocation AtCompatibilityAliasLoc, 4800 IdentifierInfo *AliasName, SourceLocation AliasLocation, 4801 IdentifierInfo *ClassName, SourceLocation ClassLocation); 4802 4803 bool CheckForwardProtocolDeclarationForCircularDependency( 4804 IdentifierInfo *PName, 4805 SourceLocation &PLoc, SourceLocation PrevLoc, 4806 const ObjCList<ObjCProtocolDecl> &PList); 4807 4808 Decl *ActOnStartProtocolInterface( 4809 SourceLocation AtProtoInterfaceLoc, 4810 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 4811 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 4812 const SourceLocation *ProtoLocs, 4813 SourceLocation EndProtoLoc, 4814 AttributeList *AttrList); 4815 4816 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 4817 IdentifierInfo *ClassName, 4818 SourceLocation ClassLoc, 4819 IdentifierInfo *CategoryName, 4820 SourceLocation CategoryLoc, 4821 Decl * const *ProtoRefs, 4822 unsigned NumProtoRefs, 4823 const SourceLocation *ProtoLocs, 4824 SourceLocation EndProtoLoc); 4825 4826 Decl *ActOnStartClassImplementation( 4827 SourceLocation AtClassImplLoc, 4828 IdentifierInfo *ClassName, SourceLocation ClassLoc, 4829 IdentifierInfo *SuperClassname, 4830 SourceLocation SuperClassLoc); 4831 4832 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 4833 IdentifierInfo *ClassName, 4834 SourceLocation ClassLoc, 4835 IdentifierInfo *CatName, 4836 SourceLocation CatLoc); 4837 4838 Decl *ActOnForwardClassDeclaration(SourceLocation Loc, 4839 IdentifierInfo **IdentList, 4840 SourceLocation *IdentLocs, 4841 unsigned NumElts); 4842 4843 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 4844 const IdentifierLocPair *IdentList, 4845 unsigned NumElts, 4846 AttributeList *attrList); 4847 4848 void FindProtocolDeclaration(bool WarnOnDeclarations, 4849 const IdentifierLocPair *ProtocolId, 4850 unsigned NumProtocols, 4851 llvm::SmallVectorImpl<Decl *> &Protocols); 4852 4853 /// Ensure attributes are consistent with type. 4854 /// \param [in, out] Attributes The attributes to check; they will 4855 /// be modified to be consistent with \arg PropertyTy. 4856 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 4857 SourceLocation Loc, 4858 unsigned &Attributes); 4859 4860 /// Process the specified property declaration and create decls for the 4861 /// setters and getters as needed. 4862 /// \param property The property declaration being processed 4863 /// \param DC The semantic container for the property 4864 /// \param redeclaredProperty Declaration for property if redeclared 4865 /// in class extension. 4866 /// \param lexicalDC Container for redeclaredProperty. 4867 void ProcessPropertyDecl(ObjCPropertyDecl *property, 4868 ObjCContainerDecl *DC, 4869 ObjCPropertyDecl *redeclaredProperty = 0, 4870 ObjCContainerDecl *lexicalDC = 0); 4871 4872 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 4873 ObjCPropertyDecl *SuperProperty, 4874 const IdentifierInfo *Name); 4875 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 4876 4877 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 4878 ObjCMethodDecl *MethodDecl, 4879 bool IsInstance); 4880 4881 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 4882 4883 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 4884 ObjCInterfaceDecl *ID); 4885 4886 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 4887 ObjCProtocolDecl *PDecl); 4888 4889 void ActOnAtEnd(Scope *S, SourceRange AtEnd, Decl *classDecl, 4890 Decl **allMethods = 0, unsigned allNum = 0, 4891 Decl **allProperties = 0, unsigned pNum = 0, 4892 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 4893 4894 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 4895 FieldDeclarator &FD, ObjCDeclSpec &ODS, 4896 Selector GetterSel, Selector SetterSel, 4897 Decl *ClassCategory, 4898 bool *OverridingProperty, 4899 tok::ObjCKeywordKind MethodImplKind, 4900 DeclContext *lexicalDC = 0); 4901 4902 Decl *ActOnPropertyImplDecl(Scope *S, 4903 SourceLocation AtLoc, 4904 SourceLocation PropertyLoc, 4905 bool ImplKind,Decl *ClassImplDecl, 4906 IdentifierInfo *PropertyId, 4907 IdentifierInfo *PropertyIvar, 4908 SourceLocation PropertyIvarLoc); 4909 4910 struct ObjCArgInfo { 4911 IdentifierInfo *Name; 4912 SourceLocation NameLoc; 4913 // The Type is null if no type was specified, and the DeclSpec is invalid 4914 // in this case. 4915 ParsedType Type; 4916 ObjCDeclSpec DeclSpec; 4917 4918 /// ArgAttrs - Attribute list for this argument. 4919 AttributeList *ArgAttrs; 4920 }; 4921 4922 Decl *ActOnMethodDeclaration( 4923 Scope *S, 4924 SourceLocation BeginLoc, // location of the + or -. 4925 SourceLocation EndLoc, // location of the ; or {. 4926 tok::TokenKind MethodType, 4927 Decl *ClassDecl, ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 4928 Selector Sel, 4929 // optional arguments. The number of types/arguments is obtained 4930 // from the Sel.getNumArgs(). 4931 ObjCArgInfo *ArgInfo, 4932 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 4933 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 4934 bool isVariadic, bool MethodDefinition); 4935 4936 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 4937 // Will search "local" class/category implementations for a method decl. 4938 // Will also search in class's root looking for instance method. 4939 // Returns 0 if no method is found. 4940 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 4941 ObjCInterfaceDecl *CDecl); 4942 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 4943 ObjCInterfaceDecl *ClassDecl); 4944 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 4945 const ObjCObjectPointerType *OPT, 4946 bool IsInstance); 4947 4948 ExprResult 4949 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 4950 Expr *BaseExpr, 4951 DeclarationName MemberName, 4952 SourceLocation MemberLoc, 4953 SourceLocation SuperLoc, QualType SuperType, 4954 bool Super); 4955 4956 ExprResult 4957 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 4958 IdentifierInfo &propertyName, 4959 SourceLocation receiverNameLoc, 4960 SourceLocation propertyNameLoc); 4961 4962 ObjCMethodDecl *tryCaptureObjCSelf(); 4963 4964 /// \brief Describes the kind of message expression indicated by a message 4965 /// send that starts with an identifier. 4966 enum ObjCMessageKind { 4967 /// \brief The message is sent to 'super'. 4968 ObjCSuperMessage, 4969 /// \brief The message is an instance message. 4970 ObjCInstanceMessage, 4971 /// \brief The message is a class message, and the identifier is a type 4972 /// name. 4973 ObjCClassMessage 4974 }; 4975 4976 ObjCMessageKind getObjCMessageKind(Scope *S, 4977 IdentifierInfo *Name, 4978 SourceLocation NameLoc, 4979 bool IsSuper, 4980 bool HasTrailingDot, 4981 ParsedType &ReceiverType); 4982 4983 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 4984 Selector Sel, 4985 SourceLocation LBracLoc, 4986 SourceLocation SelectorLoc, 4987 SourceLocation RBracLoc, 4988 MultiExprArg Args); 4989 4990 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 4991 QualType ReceiverType, 4992 SourceLocation SuperLoc, 4993 Selector Sel, 4994 ObjCMethodDecl *Method, 4995 SourceLocation LBracLoc, 4996 SourceLocation SelectorLoc, 4997 SourceLocation RBracLoc, 4998 MultiExprArg Args); 4999 5000 ExprResult ActOnClassMessage(Scope *S, 5001 ParsedType Receiver, 5002 Selector Sel, 5003 SourceLocation LBracLoc, 5004 SourceLocation SelectorLoc, 5005 SourceLocation RBracLoc, 5006 MultiExprArg Args); 5007 5008 ExprResult BuildInstanceMessage(Expr *Receiver, 5009 QualType ReceiverType, 5010 SourceLocation SuperLoc, 5011 Selector Sel, 5012 ObjCMethodDecl *Method, 5013 SourceLocation LBracLoc, 5014 SourceLocation SelectorLoc, 5015 SourceLocation RBracLoc, 5016 MultiExprArg Args); 5017 5018 ExprResult ActOnInstanceMessage(Scope *S, 5019 Expr *Receiver, 5020 Selector Sel, 5021 SourceLocation LBracLoc, 5022 SourceLocation SelectorLoc, 5023 SourceLocation RBracLoc, 5024 MultiExprArg Args); 5025 5026 5027 enum PragmaOptionsAlignKind { 5028 POAK_Native, // #pragma options align=native 5029 POAK_Natural, // #pragma options align=natural 5030 POAK_Packed, // #pragma options align=packed 5031 POAK_Power, // #pragma options align=power 5032 POAK_Mac68k, // #pragma options align=mac68k 5033 POAK_Reset // #pragma options align=reset 5034 }; 5035 5036 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5037 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5038 SourceLocation PragmaLoc, 5039 SourceLocation KindLoc); 5040 5041 enum PragmaPackKind { 5042 PPK_Default, // #pragma pack([n]) 5043 PPK_Show, // #pragma pack(show), only supported by MSVC. 5044 PPK_Push, // #pragma pack(push, [identifier], [n]) 5045 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5046 }; 5047 5048 enum PragmaMSStructKind { 5049 PMSST_OFF, // #pragms ms_struct off 5050 PMSST_ON // #pragms ms_struct on 5051 }; 5052 5053 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5054 void ActOnPragmaPack(PragmaPackKind Kind, 5055 IdentifierInfo *Name, 5056 Expr *Alignment, 5057 SourceLocation PragmaLoc, 5058 SourceLocation LParenLoc, 5059 SourceLocation RParenLoc); 5060 5061 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5062 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5063 5064 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5065 void ActOnPragmaUnused(const Token &Identifier, 5066 Scope *curScope, 5067 SourceLocation PragmaLoc); 5068 5069 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5070 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 5071 SourceLocation PragmaLoc); 5072 5073 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II); 5074 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5075 5076 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5077 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5078 SourceLocation PragmaLoc, 5079 SourceLocation WeakNameLoc); 5080 5081 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5082 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5083 IdentifierInfo* AliasName, 5084 SourceLocation PragmaLoc, 5085 SourceLocation WeakNameLoc, 5086 SourceLocation AliasNameLoc); 5087 5088 /// ActOnPragmaFPContract - Called on well formed 5089 /// #pragma {STDC,OPENCL} FP_CONTRACT 5090 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5091 5092 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5093 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5094 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5095 5096 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5097 void AddMsStructLayoutForRecord(RecordDecl *RD); 5098 5099 /// FreePackedContext - Deallocate and null out PackContext. 5100 void FreePackedContext(); 5101 5102 /// PushNamespaceVisibilityAttr - Note that we've entered a 5103 /// namespace with a visibility attribute. 5104 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 5105 5106 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5107 /// add an appropriate visibility attribute. 5108 void AddPushedVisibilityAttribute(Decl *RD); 5109 5110 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5111 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5112 void PopPragmaVisibility(); 5113 5114 /// FreeVisContext - Deallocate and null out VisContext. 5115 void FreeVisContext(); 5116 5117 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5118 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, Expr *E); 5119 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, TypeSourceInfo *T); 5120 5121 /// CastCategory - Get the correct forwarded implicit cast result category 5122 /// from the inner expression. 5123 ExprValueKind CastCategory(Expr *E); 5124 5125 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5126 /// cast. If there is already an implicit cast, merge into the existing one. 5127 /// If isLvalue, the result of the cast is an lvalue. 5128 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5129 ExprValueKind VK = VK_RValue, 5130 const CXXCastPath *BasePath = 0); 5131 5132 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5133 /// to the conversion from scalar type ScalarTy to the Boolean type. 5134 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5135 5136 /// IgnoredValueConversions - Given that an expression's result is 5137 /// syntactically ignored, perform any conversions that are 5138 /// required. 5139 ExprResult IgnoredValueConversions(Expr *E); 5140 5141 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5142 // functions and arrays to their respective pointers (C99 6.3.2.1). 5143 ExprResult UsualUnaryConversions(Expr *E); 5144 5145 // DefaultFunctionArrayConversion - converts functions and arrays 5146 // to their respective pointers (C99 6.3.2.1). 5147 ExprResult DefaultFunctionArrayConversion(Expr *E); 5148 5149 // DefaultFunctionArrayLvalueConversion - converts functions and 5150 // arrays to their respective pointers and performs the 5151 // lvalue-to-rvalue conversion. 5152 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5153 5154 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5155 // the operand. This is DefaultFunctionArrayLvalueConversion, 5156 // except that it assumes the operand isn't of function or array 5157 // type. 5158 ExprResult DefaultLvalueConversion(Expr *E); 5159 5160 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5161 // do not have a prototype. Integer promotions are performed on each 5162 // argument, and arguments that have type float are promoted to double. 5163 ExprResult DefaultArgumentPromotion(Expr *E); 5164 5165 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5166 enum VariadicCallType { 5167 VariadicFunction, 5168 VariadicBlock, 5169 VariadicMethod, 5170 VariadicConstructor, 5171 VariadicDoesNotApply 5172 }; 5173 5174 /// GatherArgumentsForCall - Collector argument expressions for various 5175 /// form of call prototypes. 5176 bool GatherArgumentsForCall(SourceLocation CallLoc, 5177 FunctionDecl *FDecl, 5178 const FunctionProtoType *Proto, 5179 unsigned FirstProtoArg, 5180 Expr **Args, unsigned NumArgs, 5181 llvm::SmallVector<Expr *, 8> &AllArgs, 5182 VariadicCallType CallType = VariadicDoesNotApply); 5183 5184 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5185 // will warn if the resulting type is not a POD type. 5186 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5187 FunctionDecl *FDecl); 5188 5189 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5190 // operands and then handles various conversions that are common to binary 5191 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5192 // routine returns the first non-arithmetic type found. The client is 5193 // responsible for emitting appropriate error diagnostics. 5194 QualType UsualArithmeticConversions(ExprResult &lExpr, ExprResult &rExpr, 5195 bool isCompAssign = false); 5196 5197 /// AssignConvertType - All of the 'assignment' semantic checks return this 5198 /// enum to indicate whether the assignment was allowed. These checks are 5199 /// done for simple assignments, as well as initialization, return from 5200 /// function, argument passing, etc. The query is phrased in terms of a 5201 /// source and destination type. 5202 enum AssignConvertType { 5203 /// Compatible - the types are compatible according to the standard. 5204 Compatible, 5205 5206 /// PointerToInt - The assignment converts a pointer to an int, which we 5207 /// accept as an extension. 5208 PointerToInt, 5209 5210 /// IntToPointer - The assignment converts an int to a pointer, which we 5211 /// accept as an extension. 5212 IntToPointer, 5213 5214 /// FunctionVoidPointer - The assignment is between a function pointer and 5215 /// void*, which the standard doesn't allow, but we accept as an extension. 5216 FunctionVoidPointer, 5217 5218 /// IncompatiblePointer - The assignment is between two pointers types that 5219 /// are not compatible, but we accept them as an extension. 5220 IncompatiblePointer, 5221 5222 /// IncompatiblePointer - The assignment is between two pointers types which 5223 /// point to integers which have a different sign, but are otherwise identical. 5224 /// This is a subset of the above, but broken out because it's by far the most 5225 /// common case of incompatible pointers. 5226 IncompatiblePointerSign, 5227 5228 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5229 /// c/v/r qualifiers, which we accept as an extension. 5230 CompatiblePointerDiscardsQualifiers, 5231 5232 /// IncompatiblePointerDiscardsQualifiers - The assignment 5233 /// discards qualifiers that we don't permit to be discarded, 5234 /// like address spaces. 5235 IncompatiblePointerDiscardsQualifiers, 5236 5237 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5238 /// nested pointer types, and the qualifiers other than the first two 5239 /// levels differ e.g. char ** -> const char **, but we accept them as an 5240 /// extension. 5241 IncompatibleNestedPointerQualifiers, 5242 5243 /// IncompatibleVectors - The assignment is between two vector types that 5244 /// have the same size, which we accept as an extension. 5245 IncompatibleVectors, 5246 5247 /// IntToBlockPointer - The assignment converts an int to a block 5248 /// pointer. We disallow this. 5249 IntToBlockPointer, 5250 5251 /// IncompatibleBlockPointer - The assignment is between two block 5252 /// pointers types that are not compatible. 5253 IncompatibleBlockPointer, 5254 5255 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5256 /// id type and something else (that is incompatible with it). For example, 5257 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5258 IncompatibleObjCQualifiedId, 5259 5260 /// Incompatible - We reject this conversion outright, it is invalid to 5261 /// represent it in the AST. 5262 Incompatible 5263 }; 5264 5265 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5266 /// assignment conversion type specified by ConvTy. This returns true if the 5267 /// conversion was invalid or false if the conversion was accepted. 5268 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5269 SourceLocation Loc, 5270 QualType DstType, QualType SrcType, 5271 Expr *SrcExpr, AssignmentAction Action, 5272 bool *Complained = 0); 5273 5274 /// CheckAssignmentConstraints - Perform type checking for assignment, 5275 /// argument passing, variable initialization, and function return values. 5276 /// C99 6.5.16. 5277 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5278 QualType lhs, QualType rhs); 5279 5280 /// Check assignment constraints and prepare for a conversion of the 5281 /// RHS to the LHS type. 5282 AssignConvertType CheckAssignmentConstraints(QualType lhs, ExprResult &rhs, 5283 CastKind &Kind); 5284 5285 // CheckSingleAssignmentConstraints - Currently used by 5286 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5287 // this routine performs the default function/array converions. 5288 AssignConvertType CheckSingleAssignmentConstraints(QualType lhs, 5289 ExprResult &rExprRes); 5290 5291 // \brief If the lhs type is a transparent union, check whether we 5292 // can initialize the transparent union with the given expression. 5293 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType lhs, 5294 ExprResult &rExpr); 5295 5296 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5297 5298 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5299 5300 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5301 AssignmentAction Action, 5302 bool AllowExplicit = false); 5303 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5304 AssignmentAction Action, 5305 bool AllowExplicit, 5306 ImplicitConversionSequence& ICS); 5307 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5308 const ImplicitConversionSequence& ICS, 5309 AssignmentAction Action, 5310 bool CStyle = false); 5311 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5312 const StandardConversionSequence& SCS, 5313 AssignmentAction Action, 5314 bool CStyle); 5315 5316 /// the following "Check" methods will return a valid/converted QualType 5317 /// or a null QualType (indicating an error diagnostic was issued). 5318 5319 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5320 QualType InvalidOperands(SourceLocation l, ExprResult &lex, ExprResult &rex); 5321 QualType CheckPointerToMemberOperands( // C++ 5.5 5322 ExprResult &lex, ExprResult &rex, ExprValueKind &VK, 5323 SourceLocation OpLoc, bool isIndirect); 5324 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5325 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign, 5326 bool isDivide); 5327 QualType CheckRemainderOperands( // C99 6.5.5 5328 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 5329 QualType CheckAdditionOperands( // C99 6.5.6 5330 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 5331 QualType CheckSubtractionOperands( // C99 6.5.6 5332 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 5333 QualType CheckShiftOperands( // C99 6.5.7 5334 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 5335 bool isCompAssign = false); 5336 QualType CheckCompareOperands( // C99 6.5.8/9 5337 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 5338 bool isRelational); 5339 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 5340 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 5341 QualType CheckLogicalOperands( // C99 6.5.[13,14] 5342 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc); 5343 // CheckAssignmentOperands is used for both simple and compound assignment. 5344 // For simple assignment, pass both expressions and a null converted type. 5345 // For compound assignment, pass both expressions and the converted type. 5346 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 5347 Expr *lex, ExprResult &rex, SourceLocation OpLoc, QualType convertedType); 5348 5349 void ConvertPropertyForLValue(ExprResult &LHS, ExprResult &RHS, QualType& LHSTy); 5350 ExprResult ConvertPropertyForRValue(Expr *E); 5351 5352 QualType CheckConditionalOperands( // C99 6.5.15 5353 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5354 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5355 QualType CXXCheckConditionalOperands( // C++ 5.16 5356 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5357 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5358 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 5359 bool *NonStandardCompositeType = 0); 5360 QualType FindCompositePointerType(SourceLocation Loc, ExprResult &E1, ExprResult &E2, 5361 bool *NonStandardCompositeType = 0) { 5362 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 5363 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, NonStandardCompositeType); 5364 E1 = Owned(E1Tmp); 5365 E2 = Owned(E2Tmp); 5366 return Composite; 5367 } 5368 5369 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5370 SourceLocation questionLoc); 5371 5372 bool DiagnoseConditionalForNull(Expr *LHS, Expr *RHS, 5373 SourceLocation QuestionLoc); 5374 5375 /// type checking for vector binary operators. 5376 QualType CheckVectorOperands(SourceLocation l, ExprResult &lex, ExprResult &rex); 5377 QualType CheckVectorCompareOperands(ExprResult &lex, ExprResult &rx, 5378 SourceLocation l, bool isRel); 5379 5380 /// type checking declaration initializers (C99 6.7.8) 5381 bool CheckInitList(const InitializedEntity &Entity, 5382 InitListExpr *&InitList, QualType &DeclType); 5383 bool CheckForConstantInitializer(Expr *e, QualType t); 5384 5385 // type checking C++ declaration initializers (C++ [dcl.init]). 5386 5387 /// ReferenceCompareResult - Expresses the result of comparing two 5388 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5389 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5390 enum ReferenceCompareResult { 5391 /// Ref_Incompatible - The two types are incompatible, so direct 5392 /// reference binding is not possible. 5393 Ref_Incompatible = 0, 5394 /// Ref_Related - The two types are reference-related, which means 5395 /// that their unqualified forms (T1 and T2) are either the same 5396 /// or T1 is a base class of T2. 5397 Ref_Related, 5398 /// Ref_Compatible_With_Added_Qualification - The two types are 5399 /// reference-compatible with added qualification, meaning that 5400 /// they are reference-compatible and the qualifiers on T1 (cv1) 5401 /// are greater than the qualifiers on T2 (cv2). 5402 Ref_Compatible_With_Added_Qualification, 5403 /// Ref_Compatible - The two types are reference-compatible and 5404 /// have equivalent qualifiers (cv1 == cv2). 5405 Ref_Compatible 5406 }; 5407 5408 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 5409 QualType T1, QualType T2, 5410 bool &DerivedToBase, 5411 bool &ObjCConversion); 5412 5413 /// CheckCastTypes - Check type constraints for casting between types under 5414 /// C semantics, or forward to CXXCheckCStyleCast in C++. 5415 ExprResult CheckCastTypes(SourceRange TyRange, QualType CastTy, Expr *CastExpr, 5416 CastKind &Kind, ExprValueKind &VK, CXXCastPath &BasePath, 5417 bool FunctionalStyle = false); 5418 5419 ExprResult checkUnknownAnyCast(SourceRange TyRange, QualType castType, 5420 Expr *castExpr, CastKind &castKind, 5421 ExprValueKind &valueKind, CXXCastPath &BasePath); 5422 5423 // CheckVectorCast - check type constraints for vectors. 5424 // Since vectors are an extension, there are no C standard reference for this. 5425 // We allow casting between vectors and integer datatypes of the same size. 5426 // returns true if the cast is invalid 5427 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 5428 CastKind &Kind); 5429 5430 // CheckExtVectorCast - check type constraints for extended vectors. 5431 // Since vectors are an extension, there are no C standard reference for this. 5432 // We allow casting between vectors and integer datatypes of the same size, 5433 // or vectors and the element type of that vector. 5434 // returns the cast expr 5435 ExprResult CheckExtVectorCast(SourceRange R, QualType VectorTy, Expr *CastExpr, 5436 CastKind &Kind); 5437 5438 /// CXXCheckCStyleCast - Check constraints of a C-style or function-style 5439 /// cast under C++ semantics. 5440 ExprResult CXXCheckCStyleCast(SourceRange R, QualType CastTy, ExprValueKind &VK, 5441 Expr *CastExpr, CastKind &Kind, 5442 CXXCastPath &BasePath, bool FunctionalStyle); 5443 5444 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 5445 /// \param Method - May be null. 5446 /// \param [out] ReturnType - The return type of the send. 5447 /// \return true iff there were any incompatible types. 5448 bool CheckMessageArgumentTypes(Expr **Args, unsigned NumArgs, Selector Sel, 5449 ObjCMethodDecl *Method, bool isClassMessage, 5450 SourceLocation lbrac, SourceLocation rbrac, 5451 QualType &ReturnType, ExprValueKind &VK); 5452 5453 /// CheckBooleanCondition - Diagnose problems involving the use of 5454 /// the given expression as a boolean condition (e.g. in an if 5455 /// statement). Also performs the standard function and array 5456 /// decays, possibly changing the input variable. 5457 /// 5458 /// \param Loc - A location associated with the condition, e.g. the 5459 /// 'if' keyword. 5460 /// \return true iff there were any errors 5461 ExprResult CheckBooleanCondition(Expr *CondExpr, SourceLocation Loc); 5462 5463 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 5464 Expr *SubExpr); 5465 5466 /// DiagnoseAssignmentAsCondition - Given that an expression is 5467 /// being used as a boolean condition, warn if it's an assignment. 5468 void DiagnoseAssignmentAsCondition(Expr *E); 5469 5470 /// \brief Redundant parentheses over an equality comparison can indicate 5471 /// that the user intended an assignment used as condition. 5472 void DiagnoseEqualityWithExtraParens(ParenExpr *parenE); 5473 5474 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 5475 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 5476 5477 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 5478 /// the specified width and sign. If an overflow occurs, detect it and emit 5479 /// the specified diagnostic. 5480 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 5481 unsigned NewWidth, bool NewSign, 5482 SourceLocation Loc, unsigned DiagID); 5483 5484 /// Checks that the Objective-C declaration is declared in the global scope. 5485 /// Emits an error and marks the declaration as invalid if it's not declared 5486 /// in the global scope. 5487 bool CheckObjCDeclScope(Decl *D); 5488 5489 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 5490 /// and reports the appropriate diagnostics. Returns false on success. 5491 /// Can optionally return the value of the expression. 5492 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 5493 5494 /// VerifyBitField - verifies that a bit field expression is an ICE and has 5495 /// the correct width, and that the field type is valid. 5496 /// Returns false on success. 5497 /// Can optionally return whether the bit-field is of width 0 5498 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 5499 QualType FieldTy, const Expr *BitWidth, 5500 bool *ZeroWidth = 0); 5501 5502 /// \name Code completion 5503 //@{ 5504 /// \brief Describes the context in which code completion occurs. 5505 enum ParserCompletionContext { 5506 /// \brief Code completion occurs at top-level or namespace context. 5507 PCC_Namespace, 5508 /// \brief Code completion occurs within a class, struct, or union. 5509 PCC_Class, 5510 /// \brief Code completion occurs within an Objective-C interface, protocol, 5511 /// or category. 5512 PCC_ObjCInterface, 5513 /// \brief Code completion occurs within an Objective-C implementation or 5514 /// category implementation 5515 PCC_ObjCImplementation, 5516 /// \brief Code completion occurs within the list of instance variables 5517 /// in an Objective-C interface, protocol, category, or implementation. 5518 PCC_ObjCInstanceVariableList, 5519 /// \brief Code completion occurs following one or more template 5520 /// headers. 5521 PCC_Template, 5522 /// \brief Code completion occurs following one or more template 5523 /// headers within a class. 5524 PCC_MemberTemplate, 5525 /// \brief Code completion occurs within an expression. 5526 PCC_Expression, 5527 /// \brief Code completion occurs within a statement, which may 5528 /// also be an expression or a declaration. 5529 PCC_Statement, 5530 /// \brief Code completion occurs at the beginning of the 5531 /// initialization statement (or expression) in a for loop. 5532 PCC_ForInit, 5533 /// \brief Code completion occurs within the condition of an if, 5534 /// while, switch, or for statement. 5535 PCC_Condition, 5536 /// \brief Code completion occurs within the body of a function on a 5537 /// recovery path, where we do not have a specific handle on our position 5538 /// in the grammar. 5539 PCC_RecoveryInFunction, 5540 /// \brief Code completion occurs where only a type is permitted. 5541 PCC_Type, 5542 /// \brief Code completion occurs in a parenthesized expression, which 5543 /// might also be a type cast. 5544 PCC_ParenthesizedExpression, 5545 /// \brief Code completion occurs within a sequence of declaration 5546 /// specifiers within a function, method, or block. 5547 PCC_LocalDeclarationSpecifiers 5548 }; 5549 5550 void CodeCompleteOrdinaryName(Scope *S, 5551 ParserCompletionContext CompletionContext); 5552 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 5553 bool AllowNonIdentifiers, 5554 bool AllowNestedNameSpecifiers); 5555 5556 struct CodeCompleteExpressionData; 5557 void CodeCompleteExpression(Scope *S, 5558 const CodeCompleteExpressionData &Data); 5559 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 5560 SourceLocation OpLoc, 5561 bool IsArrow); 5562 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 5563 void CodeCompleteTag(Scope *S, unsigned TagSpec); 5564 void CodeCompleteTypeQualifiers(DeclSpec &DS); 5565 void CodeCompleteCase(Scope *S); 5566 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 5567 void CodeCompleteInitializer(Scope *S, Decl *D); 5568 void CodeCompleteReturn(Scope *S); 5569 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 5570 5571 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 5572 bool EnteringContext); 5573 void CodeCompleteUsing(Scope *S); 5574 void CodeCompleteUsingDirective(Scope *S); 5575 void CodeCompleteNamespaceDecl(Scope *S); 5576 void CodeCompleteNamespaceAliasDecl(Scope *S); 5577 void CodeCompleteOperatorName(Scope *S); 5578 void CodeCompleteConstructorInitializer(Decl *Constructor, 5579 CXXCtorInitializer** Initializers, 5580 unsigned NumInitializers); 5581 5582 void CodeCompleteObjCAtDirective(Scope *S, Decl *ObjCImpDecl, 5583 bool InInterface); 5584 void CodeCompleteObjCAtVisibility(Scope *S); 5585 void CodeCompleteObjCAtStatement(Scope *S); 5586 void CodeCompleteObjCAtExpression(Scope *S); 5587 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 5588 void CodeCompleteObjCPropertyGetter(Scope *S, Decl *ClassDecl); 5589 void CodeCompleteObjCPropertySetter(Scope *S, Decl *ClassDecl); 5590 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 5591 bool IsParameter); 5592 void CodeCompleteObjCMessageReceiver(Scope *S); 5593 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 5594 IdentifierInfo **SelIdents, 5595 unsigned NumSelIdents, 5596 bool AtArgumentExpression); 5597 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 5598 IdentifierInfo **SelIdents, 5599 unsigned NumSelIdents, 5600 bool AtArgumentExpression, 5601 bool IsSuper = false); 5602 void CodeCompleteObjCInstanceMessage(Scope *S, ExprTy *Receiver, 5603 IdentifierInfo **SelIdents, 5604 unsigned NumSelIdents, 5605 bool AtArgumentExpression, 5606 ObjCInterfaceDecl *Super = 0); 5607 void CodeCompleteObjCForCollection(Scope *S, 5608 DeclGroupPtrTy IterationVar); 5609 void CodeCompleteObjCSelector(Scope *S, 5610 IdentifierInfo **SelIdents, 5611 unsigned NumSelIdents); 5612 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 5613 unsigned NumProtocols); 5614 void CodeCompleteObjCProtocolDecl(Scope *S); 5615 void CodeCompleteObjCInterfaceDecl(Scope *S); 5616 void CodeCompleteObjCSuperclass(Scope *S, 5617 IdentifierInfo *ClassName, 5618 SourceLocation ClassNameLoc); 5619 void CodeCompleteObjCImplementationDecl(Scope *S); 5620 void CodeCompleteObjCInterfaceCategory(Scope *S, 5621 IdentifierInfo *ClassName, 5622 SourceLocation ClassNameLoc); 5623 void CodeCompleteObjCImplementationCategory(Scope *S, 5624 IdentifierInfo *ClassName, 5625 SourceLocation ClassNameLoc); 5626 void CodeCompleteObjCPropertyDefinition(Scope *S, Decl *ObjCImpDecl); 5627 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 5628 IdentifierInfo *PropertyName, 5629 Decl *ObjCImpDecl); 5630 void CodeCompleteObjCMethodDecl(Scope *S, 5631 bool IsInstanceMethod, 5632 ParsedType ReturnType, 5633 Decl *IDecl); 5634 void CodeCompleteObjCMethodDeclSelector(Scope *S, 5635 bool IsInstanceMethod, 5636 bool AtParameterName, 5637 ParsedType ReturnType, 5638 IdentifierInfo **SelIdents, 5639 unsigned NumSelIdents); 5640 void CodeCompletePreprocessorDirective(bool InConditional); 5641 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 5642 void CodeCompletePreprocessorMacroName(bool IsDefinition); 5643 void CodeCompletePreprocessorExpression(); 5644 void CodeCompletePreprocessorMacroArgument(Scope *S, 5645 IdentifierInfo *Macro, 5646 MacroInfo *MacroInfo, 5647 unsigned Argument); 5648 void CodeCompleteNaturalLanguage(); 5649 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 5650 llvm::SmallVectorImpl<CodeCompletionResult> &Results); 5651 //@} 5652 5653 void PrintStats() const {} 5654 5655 //===--------------------------------------------------------------------===// 5656 // Extra semantic analysis beyond the C type system 5657 5658public: 5659 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 5660 unsigned ByteNo) const; 5661 5662private: 5663 void CheckArrayAccess(const Expr *E); 5664 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 5665 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 5666 5667 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 5668 bool CheckObjCString(Expr *Arg); 5669 5670 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5671 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5672 5673 bool SemaBuiltinVAStart(CallExpr *TheCall); 5674 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 5675 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 5676 5677public: 5678 // Used by C++ template instantiation. 5679 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 5680 5681private: 5682 bool SemaBuiltinPrefetch(CallExpr *TheCall); 5683 bool SemaBuiltinObjectSize(CallExpr *TheCall); 5684 bool SemaBuiltinLongjmp(CallExpr *TheCall); 5685 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 5686 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 5687 llvm::APSInt &Result); 5688 5689 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 5690 bool HasVAListArg, unsigned format_idx, 5691 unsigned firstDataArg, bool isPrintf); 5692 5693 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 5694 const CallExpr *TheCall, bool HasVAListArg, 5695 unsigned format_idx, unsigned firstDataArg, 5696 bool isPrintf); 5697 5698 void CheckNonNullArguments(const NonNullAttr *NonNull, 5699 const Expr * const *ExprArgs, 5700 SourceLocation CallSiteLoc); 5701 5702 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 5703 unsigned format_idx, unsigned firstDataArg, 5704 bool isPrintf); 5705 5706 void CheckMemsetcpymoveArguments(const CallExpr *Call, 5707 const IdentifierInfo *FnName); 5708 5709 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 5710 SourceLocation ReturnLoc); 5711 void CheckFloatComparison(SourceLocation loc, Expr* lex, Expr* rex); 5712 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 5713 5714 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 5715 Expr *Init); 5716 5717 /// \brief The parser's current scope. 5718 /// 5719 /// The parser maintains this state here. 5720 Scope *CurScope; 5721 5722protected: 5723 friend class Parser; 5724 friend class InitializationSequence; 5725 5726 /// \brief Retrieve the parser's current scope. 5727 Scope *getCurScope() const { return CurScope; } 5728}; 5729 5730/// \brief RAII object that enters a new expression evaluation context. 5731class EnterExpressionEvaluationContext { 5732 Sema &Actions; 5733 5734public: 5735 EnterExpressionEvaluationContext(Sema &Actions, 5736 Sema::ExpressionEvaluationContext NewContext) 5737 : Actions(Actions) { 5738 Actions.PushExpressionEvaluationContext(NewContext); 5739 } 5740 5741 ~EnterExpressionEvaluationContext() { 5742 Actions.PopExpressionEvaluationContext(); 5743 } 5744}; 5745 5746} // end namespace clang 5747 5748#endif 5749