Sema.h revision 483b9f3bc05c5409e2c6643f1c9d91e21c8ff9d2
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 "llvm/ADT/OwningPtr.h" 31#include "llvm/ADT/SmallPtrSet.h" 32#include "llvm/ADT/SmallVector.h" 33#include <deque> 34#include <string> 35 36namespace llvm { 37 class APSInt; 38 template <typename ValueT> struct DenseMapInfo; 39 template <typename ValueT, typename ValueInfoT> class DenseSet; 40} 41 42namespace clang { 43 class ADLResult; 44 class ASTConsumer; 45 class ASTContext; 46 class ArrayType; 47 class AttributeList; 48 class BlockDecl; 49 class CXXBasePath; 50 class CXXBasePaths; 51 typedef llvm::SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 52 class CXXConstructorDecl; 53 class CXXConversionDecl; 54 class CXXDestructorDecl; 55 class CXXFieldCollector; 56 class CXXMemberCallExpr; 57 class CXXMethodDecl; 58 class CXXScopeSpec; 59 class CXXTemporary; 60 class CXXTryStmt; 61 class CallExpr; 62 class ClassTemplateDecl; 63 class ClassTemplatePartialSpecializationDecl; 64 class ClassTemplateSpecializationDecl; 65 class CodeCompleteConsumer; 66 class CodeCompletionAllocator; 67 class CodeCompletionResult; 68 class Decl; 69 class DeclAccessPair; 70 class DeclContext; 71 class DeclRefExpr; 72 class DeclaratorDecl; 73 class DeducedTemplateArgument; 74 class DependentDiagnostic; 75 class DesignatedInitExpr; 76 class Designation; 77 class EnumConstantDecl; 78 class Expr; 79 class ExtVectorType; 80 class ExternalSemaSource; 81 class FormatAttr; 82 class FriendDecl; 83 class FunctionDecl; 84 class FunctionProtoType; 85 class FunctionTemplateDecl; 86 class ImplicitConversionSequence; 87 class InitListExpr; 88 class InitializationKind; 89 class InitializationSequence; 90 class InitializedEntity; 91 class IntegerLiteral; 92 class LabelStmt; 93 class LangOptions; 94 class LocalInstantiationScope; 95 class LookupResult; 96 class MacroInfo; 97 class MultiLevelTemplateArgumentList; 98 class NamedDecl; 99 class NonNullAttr; 100 class ObjCCategoryDecl; 101 class ObjCCategoryImplDecl; 102 class ObjCCompatibleAliasDecl; 103 class ObjCContainerDecl; 104 class ObjCImplDecl; 105 class ObjCImplementationDecl; 106 class ObjCInterfaceDecl; 107 class ObjCIvarDecl; 108 template <class T> class ObjCList; 109 class ObjCMethodDecl; 110 class ObjCPropertyDecl; 111 class ObjCProtocolDecl; 112 class OverloadCandidateSet; 113 class ParenListExpr; 114 class ParmVarDecl; 115 class Preprocessor; 116 class PseudoDestructorTypeStorage; 117 class QualType; 118 class StandardConversionSequence; 119 class Stmt; 120 class StringLiteral; 121 class SwitchStmt; 122 class TargetAttributesSema; 123 class TemplateArgument; 124 class TemplateArgumentList; 125 class TemplateArgumentLoc; 126 class TemplateDecl; 127 class TemplateParameterList; 128 class TemplatePartialOrderingContext; 129 class TemplateTemplateParmDecl; 130 class Token; 131 class TypedefDecl; 132 class TypeLoc; 133 class UnqualifiedId; 134 class UnresolvedLookupExpr; 135 class UnresolvedMemberExpr; 136 class UnresolvedSetImpl; 137 class UnresolvedSetIterator; 138 class UsingDecl; 139 class UsingShadowDecl; 140 class ValueDecl; 141 class VarDecl; 142 class VisibilityAttr; 143 class VisibleDeclConsumer; 144 class IndirectFieldDecl; 145 146namespace sema { 147 class AccessedEntity; 148 class BlockScopeInfo; 149 class DelayedDiagnostic; 150 class FunctionScopeInfo; 151 class TemplateDeductionInfo; 152} 153 154/// \brief Holds a QualType and a TypeSourceInfo* that came out of a declarator 155/// parsing. 156/// 157/// LocInfoType is a "transient" type, only needed for passing to/from Parser 158/// and Sema, when we want to preserve type source info for a parsed type. 159/// It will not participate in the type system semantics in any way. 160class LocInfoType : public Type { 161 enum { 162 // The last number that can fit in Type's TC. 163 // Avoids conflict with an existing Type class. 164 LocInfo = Type::TypeLast + 1 165 }; 166 167 TypeSourceInfo *DeclInfo; 168 169 LocInfoType(QualType ty, TypeSourceInfo *TInfo) 170 : Type((TypeClass)LocInfo, ty, ty->isDependentType(), 171 ty->isVariablyModifiedType(), 172 ty->containsUnexpandedParameterPack()), 173 DeclInfo(TInfo) { 174 assert(getTypeClass() == (TypeClass)LocInfo && "LocInfo didn't fit in TC?"); 175 } 176 friend class Sema; 177 178public: 179 QualType getType() const { return getCanonicalTypeInternal(); } 180 TypeSourceInfo *getTypeSourceInfo() const { return DeclInfo; } 181 182 void getAsStringInternal(std::string &Str, 183 const PrintingPolicy &Policy) const; 184 185 static bool classof(const Type *T) { 186 return T->getTypeClass() == (TypeClass)LocInfo; 187 } 188 static bool classof(const LocInfoType *) { return true; } 189}; 190 191// FIXME: No way to easily map from TemplateTypeParmTypes to 192// TemplateTypeParmDecls, so we have this horrible PointerUnion. 193typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 194 SourceLocation> UnexpandedParameterPack; 195 196/// Sema - This implements semantic analysis and AST building for C. 197class Sema { 198 Sema(const Sema&); // DO NOT IMPLEMENT 199 void operator=(const Sema&); // DO NOT IMPLEMENT 200 mutable const TargetAttributesSema* TheTargetAttributesSema; 201public: 202 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 203 typedef OpaquePtr<TemplateName> TemplateTy; 204 typedef OpaquePtr<QualType> TypeTy; 205 typedef Attr AttrTy; 206 typedef CXXBaseSpecifier BaseTy; 207 typedef CXXCtorInitializer MemInitTy; 208 typedef Expr ExprTy; 209 typedef Stmt StmtTy; 210 typedef TemplateParameterList TemplateParamsTy; 211 typedef NestedNameSpecifier CXXScopeTy; 212 213 OpenCLOptions OpenCLFeatures; 214 FPOptions FPFeatures; 215 216 const LangOptions &LangOpts; 217 Preprocessor &PP; 218 ASTContext &Context; 219 ASTConsumer &Consumer; 220 Diagnostic &Diags; 221 SourceManager &SourceMgr; 222 223 /// \brief Source of additional semantic information. 224 ExternalSemaSource *ExternalSource; 225 226 /// \brief Code-completion consumer. 227 CodeCompleteConsumer *CodeCompleter; 228 229 /// CurContext - This is the current declaration context of parsing. 230 DeclContext *CurContext; 231 232 /// VAListTagName - The declaration name corresponding to __va_list_tag. 233 /// This is used as part of a hack to omit that class from ADL results. 234 DeclarationName VAListTagName; 235 236 /// PackContext - Manages the stack for #pragma pack. An alignment 237 /// of 0 indicates default alignment. 238 void *PackContext; // Really a "PragmaPackStack*" 239 240 /// VisContext - Manages the stack for #pragma GCC visibility. 241 void *VisContext; // Really a "PragmaVisStack*" 242 243 /// \brief Stack containing information about each of the nested 244 /// function, block, and method scopes that are currently active. 245 /// 246 /// This array is never empty. Clients should ignore the first 247 /// element, which is used to cache a single FunctionScopeInfo 248 /// that's used to parse every top-level function. 249 llvm::SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 250 251 /// ExprTemporaries - This is the stack of temporaries that are created by 252 /// the current full expression. 253 llvm::SmallVector<CXXTemporary*, 8> ExprTemporaries; 254 255 /// ExtVectorDecls - This is a list all the extended vector types. This allows 256 /// us to associate a raw vector type with one of the ext_vector type names. 257 /// This is only necessary for issuing pretty diagnostics. 258 llvm::SmallVector<TypedefDecl*, 24> ExtVectorDecls; 259 260 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 261 llvm::OwningPtr<CXXFieldCollector> FieldCollector; 262 263 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 264 265 /// PureVirtualClassDiagSet - a set of class declarations which we have 266 /// emitted a list of pure virtual functions. Used to prevent emitting the 267 /// same list more than once. 268 llvm::OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 269 270 /// ParsingInitForAutoVars - a set of declarations with auto types for which 271 /// we are currently parsing the initializer. 272 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 273 274 /// \brief A mapping from external names to the most recent 275 /// locally-scoped external declaration with that name. 276 /// 277 /// This map contains external declarations introduced in local 278 /// scoped, e.g., 279 /// 280 /// \code 281 /// void f() { 282 /// void foo(int, int); 283 /// } 284 /// \endcode 285 /// 286 /// Here, the name "foo" will be associated with the declaration on 287 /// "foo" within f. This name is not visible outside of 288 /// "f". However, we still find it in two cases: 289 /// 290 /// - If we are declaring another external with the name "foo", we 291 /// can find "foo" as a previous declaration, so that the types 292 /// of this external declaration can be checked for 293 /// compatibility. 294 /// 295 /// - If we would implicitly declare "foo" (e.g., due to a call to 296 /// "foo" in C when no prototype or definition is visible), then 297 /// we find this declaration of "foo" and complain that it is 298 /// not visible. 299 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 300 301 /// \brief All the tentative definitions encountered in the TU. 302 llvm::SmallVector<VarDecl *, 2> TentativeDefinitions; 303 304 /// \brief The set of file scoped decls seen so far that have not been used 305 /// and must warn if not used. Only contains the first declaration. 306 llvm::SmallVector<const DeclaratorDecl*, 4> UnusedFileScopedDecls; 307 308 class DelayedDiagnostics; 309 310 class ParsingDeclState { 311 unsigned SavedStackSize; 312 friend class Sema::DelayedDiagnostics; 313 }; 314 315 class ProcessingContextState { 316 unsigned SavedParsingDepth; 317 unsigned SavedActiveStackBase; 318 friend class Sema::DelayedDiagnostics; 319 }; 320 321 /// A class which encapsulates the logic for delaying diagnostics 322 /// during parsing and other processing. 323 class DelayedDiagnostics { 324 /// \brief The stack of diagnostics that were delayed due to being 325 /// produced during the parsing of a declaration. 326 sema::DelayedDiagnostic *Stack; 327 328 /// \brief The number of objects on the delayed-diagnostics stack. 329 unsigned StackSize; 330 331 /// \brief The current capacity of the delayed-diagnostics stack. 332 unsigned StackCapacity; 333 334 /// \brief The index of the first "active" delayed diagnostic in 335 /// the stack. When parsing class definitions, we ignore active 336 /// delayed diagnostics from the surrounding context. 337 unsigned ActiveStackBase; 338 339 /// \brief The depth of the declarations we're currently parsing. 340 /// This gets saved and reset whenever we enter a class definition. 341 unsigned ParsingDepth; 342 343 public: 344 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 345 ActiveStackBase(0), ParsingDepth(0) {} 346 347 ~DelayedDiagnostics() { 348 delete[] reinterpret_cast<char*>(Stack); 349 } 350 351 /// Adds a delayed diagnostic. 352 void add(const sema::DelayedDiagnostic &diag); 353 354 /// Determines whether diagnostics should be delayed. 355 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 356 357 /// Observe that we've started parsing a declaration. Access and 358 /// deprecation diagnostics will be delayed; when the declaration 359 /// is completed, all active delayed diagnostics will be evaluated 360 /// in its context, and then active diagnostics stack will be 361 /// popped down to the saved depth. 362 ParsingDeclState pushParsingDecl() { 363 ParsingDepth++; 364 365 ParsingDeclState state; 366 state.SavedStackSize = StackSize; 367 return state; 368 } 369 370 /// Observe that we're completed parsing a declaration. 371 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 372 373 /// Observe that we've started processing a different context, the 374 /// contents of which are semantically separate from the 375 /// declarations it may lexically appear in. This sets aside the 376 /// current stack of active diagnostics and starts afresh. 377 ProcessingContextState pushContext() { 378 assert(StackSize >= ActiveStackBase); 379 380 ProcessingContextState state; 381 state.SavedParsingDepth = ParsingDepth; 382 state.SavedActiveStackBase = ActiveStackBase; 383 384 ActiveStackBase = StackSize; 385 ParsingDepth = 0; 386 387 return state; 388 } 389 390 /// Observe that we've stopped processing a context. This 391 /// restores the previous stack of active diagnostics. 392 void popContext(ProcessingContextState state) { 393 assert(ActiveStackBase == StackSize); 394 assert(ParsingDepth == 0); 395 ActiveStackBase = state.SavedActiveStackBase; 396 ParsingDepth = state.SavedParsingDepth; 397 } 398 } DelayedDiagnostics; 399 400 /// A RAII object to temporarily push a declaration context. 401 class ContextRAII { 402 private: 403 Sema &S; 404 DeclContext *SavedContext; 405 ProcessingContextState SavedContextState; 406 407 public: 408 ContextRAII(Sema &S, DeclContext *ContextToPush) 409 : S(S), SavedContext(S.CurContext), 410 SavedContextState(S.DelayedDiagnostics.pushContext()) 411 { 412 assert(ContextToPush && "pushing null context"); 413 S.CurContext = ContextToPush; 414 } 415 416 void pop() { 417 if (!SavedContext) return; 418 S.CurContext = SavedContext; 419 S.DelayedDiagnostics.popContext(SavedContextState); 420 SavedContext = 0; 421 } 422 423 ~ContextRAII() { 424 pop(); 425 } 426 }; 427 428 /// WeakUndeclaredIdentifiers - Identifiers contained in 429 /// #pragma weak before declared. rare. may alias another 430 /// identifier, declared or undeclared 431 class WeakInfo { 432 IdentifierInfo *alias; // alias (optional) 433 SourceLocation loc; // for diagnostics 434 bool used; // identifier later declared? 435 public: 436 WeakInfo() 437 : alias(0), loc(SourceLocation()), used(false) {} 438 WeakInfo(IdentifierInfo *Alias, SourceLocation Loc) 439 : alias(Alias), loc(Loc), used(false) {} 440 inline IdentifierInfo * getAlias() const { return alias; } 441 inline SourceLocation getLocation() const { return loc; } 442 void setUsed(bool Used=true) { used = Used; } 443 inline bool getUsed() { return used; } 444 bool operator==(WeakInfo RHS) const { 445 return alias == RHS.getAlias() && loc == RHS.getLocation(); 446 } 447 bool operator!=(WeakInfo RHS) const { return !(*this == RHS); } 448 }; 449 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 450 451 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 452 /// #pragma weak during processing of other Decls. 453 /// I couldn't figure out a clean way to generate these in-line, so 454 /// we store them here and handle separately -- which is a hack. 455 /// It would be best to refactor this. 456 llvm::SmallVector<Decl*,2> WeakTopLevelDecl; 457 458 IdentifierResolver IdResolver; 459 460 /// Translation Unit Scope - useful to Objective-C actions that need 461 /// to lookup file scope declarations in the "ordinary" C decl namespace. 462 /// For example, user-defined classes, built-in "id" type, etc. 463 Scope *TUScope; 464 465 /// \brief The C++ "std" namespace, where the standard library resides. 466 LazyDeclPtr StdNamespace; 467 468 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 469 /// standard library. 470 LazyDeclPtr StdBadAlloc; 471 472 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 473 RecordDecl *CXXTypeInfoDecl; 474 475 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 476 RecordDecl *MSVCGuidDecl; 477 478 /// A flag to remember whether the implicit forms of operator new and delete 479 /// have been declared. 480 bool GlobalNewDeleteDeclared; 481 482 /// \brief The set of declarations that have been referenced within 483 /// a potentially evaluated expression. 484 typedef llvm::SmallVector<std::pair<SourceLocation, Decl *>, 10> 485 PotentiallyReferencedDecls; 486 487 /// \brief A set of diagnostics that may be emitted. 488 typedef llvm::SmallVector<std::pair<SourceLocation, PartialDiagnostic>, 10> 489 PotentiallyEmittedDiagnostics; 490 491 /// \brief Describes how the expressions currently being parsed are 492 /// evaluated at run-time, if at all. 493 enum ExpressionEvaluationContext { 494 /// \brief The current expression and its subexpressions occur within an 495 /// unevaluated operand (C++0x [expr]p8), such as a constant expression 496 /// or the subexpression of \c sizeof, where the type or the value of the 497 /// expression may be significant but no code will be generated to evaluate 498 /// the value of the expression at run time. 499 Unevaluated, 500 501 /// \brief The current expression is potentially evaluated at run time, 502 /// which means that code may be generated to evaluate the value of the 503 /// expression at run time. 504 PotentiallyEvaluated, 505 506 /// \brief The current expression may be potentially evaluated or it may 507 /// be unevaluated, but it is impossible to tell from the lexical context. 508 /// This evaluation context is used primary for the operand of the C++ 509 /// \c typeid expression, whose argument is potentially evaluated only when 510 /// it is an lvalue of polymorphic class type (C++ [basic.def.odr]p2). 511 PotentiallyPotentiallyEvaluated, 512 513 /// \brief The current expression is potentially evaluated, but any 514 /// declarations referenced inside that expression are only used if 515 /// in fact the current expression is used. 516 /// 517 /// This value is used when parsing default function arguments, for which 518 /// we would like to provide diagnostics (e.g., passing non-POD arguments 519 /// through varargs) but do not want to mark declarations as "referenced" 520 /// until the default argument is used. 521 PotentiallyEvaluatedIfUsed 522 }; 523 524 /// \brief Data structure used to record current or nested 525 /// expression evaluation contexts. 526 struct ExpressionEvaluationContextRecord { 527 /// \brief The expression evaluation context. 528 ExpressionEvaluationContext Context; 529 530 /// \brief The number of temporaries that were active when we 531 /// entered this expression evaluation context. 532 unsigned NumTemporaries; 533 534 /// \brief The set of declarations referenced within a 535 /// potentially potentially-evaluated context. 536 /// 537 /// When leaving a potentially potentially-evaluated context, each 538 /// of these elements will be as referenced if the corresponding 539 /// potentially potentially evaluated expression is potentially 540 /// evaluated. 541 PotentiallyReferencedDecls *PotentiallyReferenced; 542 543 /// \brief The set of diagnostics to emit should this potentially 544 /// potentially-evaluated context become evaluated. 545 PotentiallyEmittedDiagnostics *PotentiallyDiagnosed; 546 547 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 548 unsigned NumTemporaries) 549 : Context(Context), NumTemporaries(NumTemporaries), 550 PotentiallyReferenced(0), PotentiallyDiagnosed(0) { } 551 552 void addReferencedDecl(SourceLocation Loc, Decl *Decl) { 553 if (!PotentiallyReferenced) 554 PotentiallyReferenced = new PotentiallyReferencedDecls; 555 PotentiallyReferenced->push_back(std::make_pair(Loc, Decl)); 556 } 557 558 void addDiagnostic(SourceLocation Loc, const PartialDiagnostic &PD) { 559 if (!PotentiallyDiagnosed) 560 PotentiallyDiagnosed = new PotentiallyEmittedDiagnostics; 561 PotentiallyDiagnosed->push_back(std::make_pair(Loc, PD)); 562 } 563 564 void Destroy() { 565 delete PotentiallyReferenced; 566 delete PotentiallyDiagnosed; 567 PotentiallyReferenced = 0; 568 PotentiallyDiagnosed = 0; 569 } 570 }; 571 572 /// A stack of expression evaluation contexts. 573 llvm::SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 574 575 /// \brief Whether the code handled by Sema should be considered a 576 /// complete translation unit or not. 577 /// 578 /// When true (which is generally the case), Sema will perform 579 /// end-of-translation-unit semantic tasks (such as creating 580 /// initializers for tentative definitions in C) once parsing has 581 /// completed. This flag will be false when building PCH files, 582 /// since a PCH file is by definition not a complete translation 583 /// unit. 584 bool CompleteTranslationUnit; 585 586 llvm::BumpPtrAllocator BumpAlloc; 587 588 /// \brief The number of SFINAE diagnostics that have been trapped. 589 unsigned NumSFINAEErrors; 590 591 typedef llvm::DenseMap<ParmVarDecl *, llvm::SmallVector<ParmVarDecl *, 1> > 592 UnparsedDefaultArgInstantiationsMap; 593 594 /// \brief A mapping from parameters with unparsed default arguments to the 595 /// set of instantiations of each parameter. 596 /// 597 /// This mapping is a temporary data structure used when parsing 598 /// nested class templates or nested classes of class templates, 599 /// where we might end up instantiating an inner class before the 600 /// default arguments of its methods have been parsed. 601 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 602 603 // Contains the locations of the beginning of unparsed default 604 // argument locations. 605 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 606 607 /// UndefinedInternals - all the used, undefined objects with 608 /// internal linkage in this translation unit. 609 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 610 611 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 612 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 613 614 /// Method Pool - allows efficient lookup when typechecking messages to "id". 615 /// We need to maintain a list, since selectors can have differing signatures 616 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 617 /// of selectors are "overloaded"). 618 GlobalMethodPool MethodPool; 619 620 /// Method selectors used in a @selector expression. Used for implementation 621 /// of -Wselector. 622 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 623 624 GlobalMethodPool::iterator ReadMethodPool(Selector Sel); 625 626 /// Private Helper predicate to check for 'self'. 627 bool isSelfExpr(Expr *RExpr); 628public: 629 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 630 bool CompleteTranslationUnit = true, 631 CodeCompleteConsumer *CompletionConsumer = 0); 632 ~Sema(); 633 634 /// \brief Perform initialization that occurs after the parser has been 635 /// initialized but before it parses anything. 636 void Initialize(); 637 638 const LangOptions &getLangOptions() const { return LangOpts; } 639 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 640 FPOptions &getFPOptions() { return FPFeatures; } 641 642 Diagnostic &getDiagnostics() const { return Diags; } 643 SourceManager &getSourceManager() const { return SourceMgr; } 644 const TargetAttributesSema &getTargetAttributesSema() const; 645 Preprocessor &getPreprocessor() const { return PP; } 646 ASTContext &getASTContext() const { return Context; } 647 ASTConsumer &getASTConsumer() const { return Consumer; } 648 649 /// \brief Helper class that creates diagnostics with optional 650 /// template instantiation stacks. 651 /// 652 /// This class provides a wrapper around the basic DiagnosticBuilder 653 /// class that emits diagnostics. SemaDiagnosticBuilder is 654 /// responsible for emitting the diagnostic (as DiagnosticBuilder 655 /// does) and, if the diagnostic comes from inside a template 656 /// instantiation, printing the template instantiation stack as 657 /// well. 658 class SemaDiagnosticBuilder : public DiagnosticBuilder { 659 Sema &SemaRef; 660 unsigned DiagID; 661 662 public: 663 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 664 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 665 666 explicit SemaDiagnosticBuilder(Sema &SemaRef) 667 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 668 669 ~SemaDiagnosticBuilder(); 670 }; 671 672 /// \brief Emit a diagnostic. 673 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 674 675 /// \brief Emit a partial diagnostic. 676 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 677 678 /// \brief Build a partial diagnostic. 679 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 680 681 ExprResult Owned(Expr* E) { return E; } 682 ExprResult Owned(ExprResult R) { return R; } 683 StmtResult Owned(Stmt* S) { return S; } 684 685 void ActOnEndOfTranslationUnit(); 686 687 Scope *getScopeForContext(DeclContext *Ctx); 688 689 void PushFunctionScope(); 690 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 691 void PopFunctionOrBlockScope(); 692 693 sema::FunctionScopeInfo *getCurFunction() const { 694 return FunctionScopes.back(); 695 } 696 697 bool hasAnyErrorsInThisFunction() const; 698 699 /// \brief Retrieve the current block, if any. 700 sema::BlockScopeInfo *getCurBlock(); 701 702 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 703 llvm::SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 704 705 //===--------------------------------------------------------------------===// 706 // Type Analysis / Processing: SemaType.cpp. 707 // 708 709 QualType adjustParameterType(QualType T); 710 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 711 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 712 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 713 } 714 QualType BuildPointerType(QualType T, 715 SourceLocation Loc, DeclarationName Entity); 716 QualType BuildReferenceType(QualType T, bool LValueRef, 717 SourceLocation Loc, DeclarationName Entity); 718 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 719 Expr *ArraySize, unsigned Quals, 720 SourceRange Brackets, DeclarationName Entity); 721 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 722 SourceLocation AttrLoc); 723 QualType BuildFunctionType(QualType T, 724 QualType *ParamTypes, unsigned NumParamTypes, 725 bool Variadic, unsigned Quals, 726 RefQualifierKind RefQualifier, 727 SourceLocation Loc, DeclarationName Entity, 728 FunctionType::ExtInfo Info); 729 QualType BuildMemberPointerType(QualType T, QualType Class, 730 SourceLocation Loc, 731 DeclarationName Entity); 732 QualType BuildBlockPointerType(QualType T, 733 SourceLocation Loc, DeclarationName Entity); 734 QualType BuildParenType(QualType T); 735 736 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S, 737 TagDecl **OwnedDecl = 0, 738 bool AllowAutoInTypeName = false); 739 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 740 TypeSourceInfo *ReturnTypeInfo); 741 /// \brief Package the given type and TSI into a ParsedType. 742 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 743 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 744 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 745 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 746 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 747 bool CheckDistantExceptionSpec(QualType T); 748 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 749 bool CheckEquivalentExceptionSpec( 750 const FunctionProtoType *Old, SourceLocation OldLoc, 751 const FunctionProtoType *New, SourceLocation NewLoc); 752 bool CheckEquivalentExceptionSpec( 753 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 754 const FunctionProtoType *Old, SourceLocation OldLoc, 755 const FunctionProtoType *New, SourceLocation NewLoc, 756 bool *MissingExceptionSpecification = 0, 757 bool *MissingEmptyExceptionSpecification = 0); 758 bool CheckExceptionSpecSubset( 759 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 760 const FunctionProtoType *Superset, SourceLocation SuperLoc, 761 const FunctionProtoType *Subset, SourceLocation SubLoc); 762 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 763 const FunctionProtoType *Target, SourceLocation TargetLoc, 764 const FunctionProtoType *Source, SourceLocation SourceLoc); 765 766 TypeResult ActOnTypeName(Scope *S, Declarator &D); 767 768 bool RequireCompleteType(SourceLocation Loc, QualType T, 769 const PartialDiagnostic &PD, 770 std::pair<SourceLocation, PartialDiagnostic> Note); 771 bool RequireCompleteType(SourceLocation Loc, QualType T, 772 const PartialDiagnostic &PD); 773 bool RequireCompleteType(SourceLocation Loc, QualType T, 774 unsigned DiagID); 775 776 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 777 const CXXScopeSpec &SS, QualType T); 778 779 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 780 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 781 782 //===--------------------------------------------------------------------===// 783 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 784 // 785 786 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr); 787 788 void DiagnoseUseOfUnimplementedSelectors(); 789 790 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 791 Scope *S, CXXScopeSpec *SS = 0, 792 bool isClassName = false, 793 bool HasTrailingDot = false, 794 ParsedType ObjectType = ParsedType()); 795 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 796 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 797 SourceLocation IILoc, 798 Scope *S, 799 CXXScopeSpec *SS, 800 ParsedType &SuggestedType); 801 802 Decl *ActOnDeclarator(Scope *S, Declarator &D); 803 804 Decl *HandleDeclarator(Scope *S, Declarator &D, 805 MultiTemplateParamsArg TemplateParameterLists, 806 bool IsFunctionDefinition); 807 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 808 const LookupResult &Previous, 809 Scope *S); 810 void DiagnoseFunctionSpecifiers(Declarator& D); 811 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 812 void CheckShadow(Scope *S, VarDecl *D); 813 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 814 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 815 QualType R, TypeSourceInfo *TInfo, 816 LookupResult &Previous, bool &Redeclaration); 817 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 818 QualType R, TypeSourceInfo *TInfo, 819 LookupResult &Previous, 820 MultiTemplateParamsArg TemplateParamLists, 821 bool &Redeclaration); 822 void CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous, 823 bool &Redeclaration); 824 void CheckCompleteVariableDeclaration(VarDecl *var); 825 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 826 QualType R, TypeSourceInfo *TInfo, 827 LookupResult &Previous, 828 MultiTemplateParamsArg TemplateParamLists, 829 bool IsFunctionDefinition, 830 bool &Redeclaration); 831 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 832 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 833 void CheckFunctionDeclaration(Scope *S, 834 FunctionDecl *NewFD, LookupResult &Previous, 835 bool IsExplicitSpecialization, 836 bool &Redeclaration); 837 void CheckMain(FunctionDecl *FD); 838 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 839 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 840 SourceLocation Loc, 841 QualType T); 842 ParmVarDecl *CheckParameter(DeclContext *DC, 843 TypeSourceInfo *TSInfo, QualType T, 844 IdentifierInfo *Name, 845 SourceLocation NameLoc, 846 StorageClass SC, 847 StorageClass SCAsWritten); 848 void ActOnParamDefaultArgument(Decl *param, 849 SourceLocation EqualLoc, 850 Expr *defarg); 851 void ActOnParamUnparsedDefaultArgument(Decl *param, 852 SourceLocation EqualLoc, 853 SourceLocation ArgLoc); 854 void ActOnParamDefaultArgumentError(Decl *param); 855 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 856 SourceLocation EqualLoc); 857 858 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 859 bool TypeMayContainAuto); 860 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 861 void ActOnInitializerError(Decl *Dcl); 862 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 863 void FinalizeDeclaration(Decl *D); 864 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 865 Decl **Group, 866 unsigned NumDecls); 867 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 868 SourceLocation LocAfterDecls); 869 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 870 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 871 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 872 873 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 874 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 875 876 /// \brief Diagnose any unused parameters in the given sequence of 877 /// ParmVarDecl pointers. 878 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 879 ParmVarDecl * const *End); 880 881 /// \brief Diagnose whether the size of parameters or return value of a 882 /// function or obj-c method definition is pass-by-value and larger than a 883 /// specified threshold. 884 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 885 ParmVarDecl * const *End, 886 QualType ReturnTy, 887 NamedDecl *D); 888 889 void DiagnoseInvalidJumps(Stmt *Body); 890 Decl *ActOnFileScopeAsmDecl(SourceLocation Loc, Expr *expr); 891 892 /// Scope actions. 893 void ActOnPopScope(SourceLocation Loc, Scope *S); 894 void ActOnTranslationUnitScope(Scope *S); 895 896 /// ParsedFreeStandingDeclSpec - This method is invoked when a declspec with 897 /// no declarator (e.g. "struct foo;") is parsed. 898 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 899 DeclSpec &DS); 900 901 StmtResult ActOnVlaStmt(const DeclSpec &DS); 902 903 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 904 AccessSpecifier AS, 905 RecordDecl *Record); 906 907 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 908 RecordDecl *Record); 909 910 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 911 TagTypeKind NewTag, 912 SourceLocation NewTagLoc, 913 const IdentifierInfo &Name); 914 915 enum TagUseKind { 916 TUK_Reference, // Reference to a tag: 'struct foo *X;' 917 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 918 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 919 TUK_Friend // Friend declaration: 'friend struct foo;' 920 }; 921 922 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 923 SourceLocation KWLoc, CXXScopeSpec &SS, 924 IdentifierInfo *Name, SourceLocation NameLoc, 925 AttributeList *Attr, AccessSpecifier AS, 926 MultiTemplateParamsArg TemplateParameterLists, 927 bool &OwnedDecl, bool &IsDependent, bool ScopedEnum, 928 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 929 930 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 931 unsigned TagSpec, SourceLocation TagLoc, 932 CXXScopeSpec &SS, 933 IdentifierInfo *Name, SourceLocation NameLoc, 934 AttributeList *Attr, 935 MultiTemplateParamsArg TempParamLists); 936 937 TypeResult ActOnDependentTag(Scope *S, 938 unsigned TagSpec, 939 TagUseKind TUK, 940 const CXXScopeSpec &SS, 941 IdentifierInfo *Name, 942 SourceLocation TagLoc, 943 SourceLocation NameLoc); 944 945 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 946 IdentifierInfo *ClassName, 947 llvm::SmallVectorImpl<Decl *> &Decls); 948 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 949 Declarator &D, Expr *BitfieldWidth); 950 951 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 952 Declarator &D, Expr *BitfieldWidth, 953 AccessSpecifier AS); 954 955 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 956 TypeSourceInfo *TInfo, 957 RecordDecl *Record, SourceLocation Loc, 958 bool Mutable, Expr *BitfieldWidth, 959 SourceLocation TSSL, 960 AccessSpecifier AS, NamedDecl *PrevDecl, 961 Declarator *D = 0); 962 963 enum CXXSpecialMember { 964 CXXInvalid = -1, 965 CXXConstructor = 0, 966 CXXCopyConstructor = 1, 967 CXXCopyAssignment = 2, 968 CXXDestructor = 3 969 }; 970 bool CheckNontrivialField(FieldDecl *FD); 971 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 972 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 973 void ActOnLastBitfield(SourceLocation DeclStart, Decl *IntfDecl, 974 llvm::SmallVectorImpl<Decl *> &AllIvarDecls); 975 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, Decl *IntfDecl, 976 Declarator &D, Expr *BitfieldWidth, 977 tok::ObjCKeywordKind visibility); 978 979 // This is used for both record definitions and ObjC interface declarations. 980 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 981 Decl **Fields, unsigned NumFields, 982 SourceLocation LBrac, SourceLocation RBrac, 983 AttributeList *AttrList); 984 985 /// ActOnTagStartDefinition - Invoked when we have entered the 986 /// scope of a tag's definition (e.g., for an enumeration, class, 987 /// struct, or union). 988 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 989 990 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 991 /// C++ record definition's base-specifiers clause and are starting its 992 /// member declarations. 993 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 994 ClassVirtSpecifiers &CVS, 995 SourceLocation LBraceLoc); 996 997 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 998 /// the definition of a tag (enumeration, class, struct, or union). 999 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1000 SourceLocation RBraceLoc); 1001 1002 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1003 /// error parsing the definition of a tag. 1004 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1005 1006 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1007 EnumConstantDecl *LastEnumConst, 1008 SourceLocation IdLoc, 1009 IdentifierInfo *Id, 1010 Expr *val); 1011 1012 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1013 SourceLocation IdLoc, IdentifierInfo *Id, 1014 AttributeList *Attrs, 1015 SourceLocation EqualLoc, Expr *Val); 1016 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1017 SourceLocation RBraceLoc, Decl *EnumDecl, 1018 Decl **Elements, unsigned NumElements, 1019 Scope *S, AttributeList *Attr); 1020 1021 DeclContext *getContainingDC(DeclContext *DC); 1022 1023 /// Set the current declaration context until it gets popped. 1024 void PushDeclContext(Scope *S, DeclContext *DC); 1025 void PopDeclContext(); 1026 1027 /// EnterDeclaratorContext - Used when we must lookup names in the context 1028 /// of a declarator's nested name specifier. 1029 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1030 void ExitDeclaratorContext(Scope *S); 1031 1032 DeclContext *getFunctionLevelDeclContext(); 1033 1034 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1035 /// to the function decl for the function being parsed. If we're currently 1036 /// in a 'block', this returns the containing context. 1037 FunctionDecl *getCurFunctionDecl(); 1038 1039 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1040 /// the method decl for the method being parsed. If we're currently 1041 /// in a 'block', this returns the containing context. 1042 ObjCMethodDecl *getCurMethodDecl(); 1043 1044 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1045 /// or C function we're in, otherwise return null. If we're currently 1046 /// in a 'block', this returns the containing context. 1047 NamedDecl *getCurFunctionOrMethodDecl(); 1048 1049 /// Add this decl to the scope shadowed decl chains. 1050 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1051 1052 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1053 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1054 /// true if 'D' belongs to the given declaration context. 1055 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0); 1056 1057 /// Finds the scope corresponding to the given decl context, if it 1058 /// happens to be an enclosing scope. Otherwise return NULL. 1059 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1060 1061 /// Subroutines of ActOnDeclarator(). 1062 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1063 TypeSourceInfo *TInfo); 1064 void MergeTypeDefDecl(TypedefDecl *New, LookupResult &OldDecls); 1065 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1066 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1067 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1068 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1069 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1070 1071 // AssignmentAction - This is used by all the assignment diagnostic functions 1072 // to represent what is actually causing the operation 1073 enum AssignmentAction { 1074 AA_Assigning, 1075 AA_Passing, 1076 AA_Returning, 1077 AA_Converting, 1078 AA_Initializing, 1079 AA_Sending, 1080 AA_Casting 1081 }; 1082 1083 /// C++ Overloading. 1084 enum OverloadKind { 1085 /// This is a legitimate overload: the existing declarations are 1086 /// functions or function templates with different signatures. 1087 Ovl_Overload, 1088 1089 /// This is not an overload because the signature exactly matches 1090 /// an existing declaration. 1091 Ovl_Match, 1092 1093 /// This is not an overload because the lookup results contain a 1094 /// non-function. 1095 Ovl_NonFunction 1096 }; 1097 OverloadKind CheckOverload(Scope *S, 1098 FunctionDecl *New, 1099 const LookupResult &OldDecls, 1100 NamedDecl *&OldDecl, 1101 bool IsForUsingDecl); 1102 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1103 1104 bool TryImplicitConversion(InitializationSequence &Sequence, 1105 const InitializedEntity &Entity, 1106 Expr *From, 1107 bool SuppressUserConversions, 1108 bool AllowExplicit, 1109 bool InOverloadResolution, 1110 bool CStyle); 1111 1112 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1113 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1114 bool IsComplexPromotion(QualType FromType, QualType ToType); 1115 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1116 bool InOverloadResolution, 1117 QualType& ConvertedType, bool &IncompatibleObjC); 1118 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1119 QualType& ConvertedType, bool &IncompatibleObjC); 1120 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1121 QualType& ConvertedType); 1122 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1123 const FunctionProtoType *NewType); 1124 1125 bool CheckPointerConversion(Expr *From, QualType ToType, 1126 CastKind &Kind, 1127 CXXCastPath& BasePath, 1128 bool IgnoreBaseAccess); 1129 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1130 bool InOverloadResolution, 1131 QualType &ConvertedType); 1132 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1133 CastKind &Kind, 1134 CXXCastPath &BasePath, 1135 bool IgnoreBaseAccess); 1136 bool IsQualificationConversion(QualType FromType, QualType ToType, 1137 bool CStyle); 1138 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1139 1140 1141 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1142 const VarDecl *NRVOCandidate, 1143 QualType ResultType, 1144 Expr *Value); 1145 1146 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1147 SourceLocation EqualLoc, 1148 ExprResult Init); 1149 bool PerformObjectArgumentInitialization(Expr *&From, 1150 NestedNameSpecifier *Qualifier, 1151 NamedDecl *FoundDecl, 1152 CXXMethodDecl *Method); 1153 1154 bool PerformContextuallyConvertToBool(Expr *&From); 1155 bool PerformContextuallyConvertToObjCId(Expr *&From); 1156 1157 ExprResult 1158 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1159 const PartialDiagnostic &NotIntDiag, 1160 const PartialDiagnostic &IncompleteDiag, 1161 const PartialDiagnostic &ExplicitConvDiag, 1162 const PartialDiagnostic &ExplicitConvNote, 1163 const PartialDiagnostic &AmbigDiag, 1164 const PartialDiagnostic &AmbigNote, 1165 const PartialDiagnostic &ConvDiag); 1166 1167 bool PerformObjectMemberConversion(Expr *&From, 1168 NestedNameSpecifier *Qualifier, 1169 NamedDecl *FoundDecl, 1170 NamedDecl *Member); 1171 1172 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1173 // TODO: make this is a typesafe union. 1174 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1175 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1176 1177 void AddOverloadCandidate(NamedDecl *Function, 1178 DeclAccessPair FoundDecl, 1179 Expr **Args, unsigned NumArgs, 1180 OverloadCandidateSet &CandidateSet); 1181 1182 void AddOverloadCandidate(FunctionDecl *Function, 1183 DeclAccessPair FoundDecl, 1184 Expr **Args, unsigned NumArgs, 1185 OverloadCandidateSet& CandidateSet, 1186 bool SuppressUserConversions = false, 1187 bool PartialOverloading = false); 1188 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1189 Expr **Args, unsigned NumArgs, 1190 OverloadCandidateSet& CandidateSet, 1191 bool SuppressUserConversions = false); 1192 void AddMethodCandidate(DeclAccessPair FoundDecl, 1193 QualType ObjectType, 1194 Expr::Classification ObjectClassification, 1195 Expr **Args, unsigned NumArgs, 1196 OverloadCandidateSet& CandidateSet, 1197 bool SuppressUserConversion = false); 1198 void AddMethodCandidate(CXXMethodDecl *Method, 1199 DeclAccessPair FoundDecl, 1200 CXXRecordDecl *ActingContext, QualType ObjectType, 1201 Expr::Classification ObjectClassification, 1202 Expr **Args, unsigned NumArgs, 1203 OverloadCandidateSet& CandidateSet, 1204 bool SuppressUserConversions = false); 1205 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1206 DeclAccessPair FoundDecl, 1207 CXXRecordDecl *ActingContext, 1208 const TemplateArgumentListInfo *ExplicitTemplateArgs, 1209 QualType ObjectType, 1210 Expr::Classification ObjectClassification, 1211 Expr **Args, unsigned NumArgs, 1212 OverloadCandidateSet& CandidateSet, 1213 bool SuppressUserConversions = false); 1214 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1215 DeclAccessPair FoundDecl, 1216 const TemplateArgumentListInfo *ExplicitTemplateArgs, 1217 Expr **Args, unsigned NumArgs, 1218 OverloadCandidateSet& CandidateSet, 1219 bool SuppressUserConversions = false); 1220 void AddConversionCandidate(CXXConversionDecl *Conversion, 1221 DeclAccessPair FoundDecl, 1222 CXXRecordDecl *ActingContext, 1223 Expr *From, QualType ToType, 1224 OverloadCandidateSet& CandidateSet); 1225 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1226 DeclAccessPair FoundDecl, 1227 CXXRecordDecl *ActingContext, 1228 Expr *From, QualType ToType, 1229 OverloadCandidateSet &CandidateSet); 1230 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1231 DeclAccessPair FoundDecl, 1232 CXXRecordDecl *ActingContext, 1233 const FunctionProtoType *Proto, 1234 Expr *Object, Expr **Args, unsigned NumArgs, 1235 OverloadCandidateSet& CandidateSet); 1236 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1237 SourceLocation OpLoc, 1238 Expr **Args, unsigned NumArgs, 1239 OverloadCandidateSet& CandidateSet, 1240 SourceRange OpRange = SourceRange()); 1241 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1242 Expr **Args, unsigned NumArgs, 1243 OverloadCandidateSet& CandidateSet, 1244 bool IsAssignmentOperator = false, 1245 unsigned NumContextualBoolArguments = 0); 1246 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1247 SourceLocation OpLoc, 1248 Expr **Args, unsigned NumArgs, 1249 OverloadCandidateSet& CandidateSet); 1250 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1251 bool Operator, 1252 Expr **Args, unsigned NumArgs, 1253 const TemplateArgumentListInfo *ExplicitTemplateArgs, 1254 OverloadCandidateSet& CandidateSet, 1255 bool PartialOverloading = false); 1256 1257 // Emit as a 'note' the specific overload candidate 1258 void NoteOverloadCandidate(FunctionDecl *Fn); 1259 1260 // Emit as a series of 'note's all template and non-templates 1261 // identified by the expression Expr 1262 void NoteAllOverloadCandidates(Expr* E); 1263 1264 // [PossiblyAFunctionType] --> [Return] 1265 // NonFunctionType --> NonFunctionType 1266 // R (A) --> R(A) 1267 // R (*)(A) --> R (A) 1268 // R (&)(A) --> R (A) 1269 // R (S::*)(A) --> R (A) 1270 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1271 1272 FunctionDecl *ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, QualType TargetType, 1273 bool Complain, 1274 DeclAccessPair &Found); 1275 1276 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(Expr *From, 1277 bool Complain = false, 1278 DeclAccessPair* Found = 0); 1279 1280 Expr *FixOverloadedFunctionReference(Expr *E, 1281 DeclAccessPair FoundDecl, 1282 FunctionDecl *Fn); 1283 ExprResult FixOverloadedFunctionReference(ExprResult, 1284 DeclAccessPair FoundDecl, 1285 FunctionDecl *Fn); 1286 1287 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1288 Expr **Args, unsigned NumArgs, 1289 OverloadCandidateSet &CandidateSet, 1290 bool PartialOverloading = false); 1291 1292 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1293 UnresolvedLookupExpr *ULE, 1294 SourceLocation LParenLoc, 1295 Expr **Args, unsigned NumArgs, 1296 SourceLocation RParenLoc, 1297 Expr *ExecConfig); 1298 1299 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1300 unsigned Opc, 1301 const UnresolvedSetImpl &Fns, 1302 Expr *input); 1303 1304 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1305 unsigned Opc, 1306 const UnresolvedSetImpl &Fns, 1307 Expr *LHS, Expr *RHS); 1308 1309 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1310 SourceLocation RLoc, 1311 Expr *Base,Expr *Idx); 1312 1313 ExprResult 1314 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1315 SourceLocation LParenLoc, Expr **Args, 1316 unsigned NumArgs, SourceLocation RParenLoc); 1317 ExprResult 1318 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1319 Expr **Args, unsigned NumArgs, 1320 SourceLocation RParenLoc); 1321 1322 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1323 SourceLocation OpLoc); 1324 1325 /// CheckCallReturnType - Checks that a call expression's return type is 1326 /// complete. Returns true on failure. The location passed in is the location 1327 /// that best represents the call. 1328 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1329 CallExpr *CE, FunctionDecl *FD); 1330 1331 /// Helpers for dealing with blocks and functions. 1332 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1333 bool CheckParameterNames); 1334 void CheckCXXDefaultArguments(FunctionDecl *FD); 1335 void CheckExtraCXXDefaultArguments(Declarator &D); 1336 Scope *getNonFieldDeclScope(Scope *S); 1337 1338 /// \name Name lookup 1339 /// 1340 /// These routines provide name lookup that is used during semantic 1341 /// analysis to resolve the various kinds of names (identifiers, 1342 /// overloaded operator names, constructor names, etc.) into zero or 1343 /// more declarations within a particular scope. The major entry 1344 /// points are LookupName, which performs unqualified name lookup, 1345 /// and LookupQualifiedName, which performs qualified name lookup. 1346 /// 1347 /// All name lookup is performed based on some specific criteria, 1348 /// which specify what names will be visible to name lookup and how 1349 /// far name lookup should work. These criteria are important both 1350 /// for capturing language semantics (certain lookups will ignore 1351 /// certain names, for example) and for performance, since name 1352 /// lookup is often a bottleneck in the compilation of C++. Name 1353 /// lookup criteria is specified via the LookupCriteria enumeration. 1354 /// 1355 /// The results of name lookup can vary based on the kind of name 1356 /// lookup performed, the current language, and the translation 1357 /// unit. In C, for example, name lookup will either return nothing 1358 /// (no entity found) or a single declaration. In C++, name lookup 1359 /// can additionally refer to a set of overloaded functions or 1360 /// result in an ambiguity. All of the possible results of name 1361 /// lookup are captured by the LookupResult class, which provides 1362 /// the ability to distinguish among them. 1363 //@{ 1364 1365 /// @brief Describes the kind of name lookup to perform. 1366 enum LookupNameKind { 1367 /// Ordinary name lookup, which finds ordinary names (functions, 1368 /// variables, typedefs, etc.) in C and most kinds of names 1369 /// (functions, variables, members, types, etc.) in C++. 1370 LookupOrdinaryName = 0, 1371 /// Tag name lookup, which finds the names of enums, classes, 1372 /// structs, and unions. 1373 LookupTagName, 1374 /// Label name lookup. 1375 LookupLabel, 1376 /// Member name lookup, which finds the names of 1377 /// class/struct/union members. 1378 LookupMemberName, 1379 /// Look up of an operator name (e.g., operator+) for use with 1380 /// operator overloading. This lookup is similar to ordinary name 1381 /// lookup, but will ignore any declarations that are class members. 1382 LookupOperatorName, 1383 /// Look up of a name that precedes the '::' scope resolution 1384 /// operator in C++. This lookup completely ignores operator, object, 1385 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1386 LookupNestedNameSpecifierName, 1387 /// Look up a namespace name within a C++ using directive or 1388 /// namespace alias definition, ignoring non-namespace names (C++ 1389 /// [basic.lookup.udir]p1). 1390 LookupNamespaceName, 1391 /// Look up all declarations in a scope with the given name, 1392 /// including resolved using declarations. This is appropriate 1393 /// for checking redeclarations for a using declaration. 1394 LookupUsingDeclName, 1395 /// Look up an ordinary name that is going to be redeclared as a 1396 /// name with linkage. This lookup ignores any declarations that 1397 /// are outside of the current scope unless they have linkage. See 1398 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1399 LookupRedeclarationWithLinkage, 1400 /// Look up the name of an Objective-C protocol. 1401 LookupObjCProtocolName, 1402 /// \brief Look up any declaration with any name. 1403 LookupAnyName 1404 }; 1405 1406 /// \brief Specifies whether (or how) name lookup is being performed for a 1407 /// redeclaration (vs. a reference). 1408 enum RedeclarationKind { 1409 /// \brief The lookup is a reference to this name that is not for the 1410 /// purpose of redeclaring the name. 1411 NotForRedeclaration = 0, 1412 /// \brief The lookup results will be used for redeclaration of a name, 1413 /// if an entity by that name already exists. 1414 ForRedeclaration 1415 }; 1416 1417private: 1418 bool CppLookupName(LookupResult &R, Scope *S); 1419 1420public: 1421 /// \brief Look up a name, looking for a single declaration. Return 1422 /// null if the results were absent, ambiguous, or overloaded. 1423 /// 1424 /// It is preferable to use the elaborated form and explicitly handle 1425 /// ambiguity and overloaded. 1426 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1427 SourceLocation Loc, 1428 LookupNameKind NameKind, 1429 RedeclarationKind Redecl 1430 = NotForRedeclaration); 1431 bool LookupName(LookupResult &R, Scope *S, 1432 bool AllowBuiltinCreation = false); 1433 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1434 bool InUnqualifiedLookup = false); 1435 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1436 bool AllowBuiltinCreation = false, 1437 bool EnteringContext = false); 1438 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1439 1440 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1441 QualType T1, QualType T2, 1442 UnresolvedSetImpl &Functions); 1443 1444 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation Loc, 1445 bool isLocalLabel = false); 1446 1447 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1448 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1449 1450 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1451 Expr **Args, unsigned NumArgs, 1452 ADLResult &Functions); 1453 1454 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1455 VisibleDeclConsumer &Consumer, 1456 bool IncludeGlobalScope = true); 1457 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1458 VisibleDeclConsumer &Consumer, 1459 bool IncludeGlobalScope = true); 1460 1461 /// \brief The context in which typo-correction occurs. 1462 /// 1463 /// The typo-correction context affects which keywords (if any) are 1464 /// considered when trying to correct for typos. 1465 enum CorrectTypoContext { 1466 /// \brief An unknown context, where any keyword might be valid. 1467 CTC_Unknown, 1468 /// \brief A context where no keywords are used (e.g. we expect an actual 1469 /// name). 1470 CTC_NoKeywords, 1471 /// \brief A context where we're correcting a type name. 1472 CTC_Type, 1473 /// \brief An expression context. 1474 CTC_Expression, 1475 /// \brief A type cast, or anything else that can be followed by a '<'. 1476 CTC_CXXCasts, 1477 /// \brief A member lookup context. 1478 CTC_MemberLookup, 1479 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1480 CTC_ObjCIvarLookup, 1481 /// \brief An Objective-C property lookup context (e.g., self.prop). 1482 CTC_ObjCPropertyLookup, 1483 /// \brief The receiver of an Objective-C message send within an 1484 /// Objective-C method where 'super' is a valid keyword. 1485 CTC_ObjCMessageReceiver 1486 }; 1487 1488 DeclarationName CorrectTypo(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1489 DeclContext *MemberContext = 0, 1490 bool EnteringContext = false, 1491 CorrectTypoContext CTC = CTC_Unknown, 1492 const ObjCObjectPointerType *OPT = 0); 1493 1494 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1495 AssociatedNamespaceSet &AssociatedNamespaces, 1496 AssociatedClassSet &AssociatedClasses); 1497 1498 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1499 //@} 1500 1501 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1502 SourceLocation IdLoc, 1503 bool TypoCorrection = false); 1504 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1505 Scope *S, bool ForRedeclaration, 1506 SourceLocation Loc); 1507 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1508 Scope *S); 1509 void AddKnownFunctionAttributes(FunctionDecl *FD); 1510 1511 // More parsing and symbol table subroutines. 1512 1513 // Decl attributes - this routine is the top level dispatcher. 1514 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1515 bool NonInheritable = true, bool Inheritable = true); 1516 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1517 bool NonInheritable = true, bool Inheritable = true); 1518 1519 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1520 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1521 bool CheckNoReturnAttr(const AttributeList &attr); 1522 1523 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1524 bool &IncompleteImpl, unsigned DiagID); 1525 void WarnConflictingTypedMethods(ObjCMethodDecl *ImpMethod, 1526 ObjCMethodDecl *IntfMethod); 1527 1528 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1529 ObjCInterfaceDecl *IDecl); 1530 1531 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1532 1533 /// CheckProtocolMethodDefs - This routine checks unimplemented 1534 /// methods declared in protocol, and those referenced by it. 1535 /// \param IDecl - Used for checking for methods which may have been 1536 /// inherited. 1537 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1538 ObjCProtocolDecl *PDecl, 1539 bool& IncompleteImpl, 1540 const SelectorSet &InsMap, 1541 const SelectorSet &ClsMap, 1542 ObjCContainerDecl *CDecl); 1543 1544 /// CheckImplementationIvars - This routine checks if the instance variables 1545 /// listed in the implelementation match those listed in the interface. 1546 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1547 ObjCIvarDecl **Fields, unsigned nIvars, 1548 SourceLocation Loc); 1549 1550 /// \brief Determine whether we can synthesize a provisional ivar for the 1551 /// given name. 1552 ObjCPropertyDecl *canSynthesizeProvisionalIvar(IdentifierInfo *II); 1553 1554 /// \brief Determine whether we can synthesize a provisional ivar for the 1555 /// given property. 1556 bool canSynthesizeProvisionalIvar(ObjCPropertyDecl *Property); 1557 1558 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1559 /// remains unimplemented in the class or category @implementation. 1560 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1561 ObjCContainerDecl* IDecl, 1562 bool IncompleteImpl = false); 1563 1564 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1565 /// which must be implemented by this implementation. 1566 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1567 ObjCContainerDecl *CDecl, 1568 const SelectorSet &InsMap); 1569 1570 /// DefaultSynthesizeProperties - This routine default synthesizes all 1571 /// properties which must be synthesized in class's @implementation. 1572 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1573 ObjCInterfaceDecl *IDecl); 1574 1575 /// CollectImmediateProperties - This routine collects all properties in 1576 /// the class and its conforming protocols; but not those it its super class. 1577 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1578 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1579 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1580 1581 1582 /// LookupPropertyDecl - Looks up a property in the current class and all 1583 /// its protocols. 1584 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1585 IdentifierInfo *II); 1586 1587 /// Called by ActOnProperty to handle @property declarations in 1588 //// class extensions. 1589 Decl *HandlePropertyInClassExtension(Scope *S, 1590 ObjCCategoryDecl *CDecl, 1591 SourceLocation AtLoc, 1592 FieldDeclarator &FD, 1593 Selector GetterSel, 1594 Selector SetterSel, 1595 const bool isAssign, 1596 const bool isReadWrite, 1597 const unsigned Attributes, 1598 bool *isOverridingProperty, 1599 TypeSourceInfo *T, 1600 tok::ObjCKeywordKind MethodImplKind); 1601 1602 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1603 /// handle creating the ObjcPropertyDecl for a category or @interface. 1604 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1605 ObjCContainerDecl *CDecl, 1606 SourceLocation AtLoc, 1607 FieldDeclarator &FD, 1608 Selector GetterSel, 1609 Selector SetterSel, 1610 const bool isAssign, 1611 const bool isReadWrite, 1612 const unsigned Attributes, 1613 TypeSourceInfo *T, 1614 tok::ObjCKeywordKind MethodImplKind, 1615 DeclContext *lexicalDC = 0); 1616 1617 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1618 /// warning) when atomic property has one but not the other user-declared 1619 /// setter or getter. 1620 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1621 ObjCContainerDecl* IDecl); 1622 1623 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1624 1625 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1626 /// true, or false, accordingly. 1627 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1628 const ObjCMethodDecl *PrevMethod, 1629 bool matchBasedOnSizeAndAlignment = false, 1630 bool matchBasedOnStrictEqulity = false); 1631 1632 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1633 /// or protocol against those declared in their implementations. 1634 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1635 const SelectorSet &ClsMap, 1636 SelectorSet &InsMapSeen, 1637 SelectorSet &ClsMapSeen, 1638 ObjCImplDecl* IMPDecl, 1639 ObjCContainerDecl* IDecl, 1640 bool &IncompleteImpl, 1641 bool ImmediateClass); 1642 1643private: 1644 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1645 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1646 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1647 1648 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1649 /// optionally warns if there are multiple signatures. 1650 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1651 bool receiverIdOrClass, 1652 bool warn, bool instance); 1653 1654public: 1655 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1656 /// unit are added to a global pool. This allows us to efficiently associate 1657 /// a selector with a method declaraation for purposes of typechecking 1658 /// messages sent to "id" (where the class of the object is unknown). 1659 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1660 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1661 } 1662 1663 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1664 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1665 AddMethodToGlobalPool(Method, impl, /*instance*/false); 1666 } 1667 1668 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 1669 /// there are multiple signatures. 1670 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 1671 bool receiverIdOrClass=false, 1672 bool warn=true) { 1673 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1674 warn, /*instance*/true); 1675 } 1676 1677 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 1678 /// there are multiple signatures. 1679 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 1680 bool receiverIdOrClass=false, 1681 bool warn=true) { 1682 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1683 warn, /*instance*/false); 1684 } 1685 1686 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 1687 /// implementation. 1688 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 1689 1690 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 1691 /// initialization. 1692 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 1693 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 1694 //===--------------------------------------------------------------------===// 1695 // Statement Parsing Callbacks: SemaStmt.cpp. 1696public: 1697 class FullExprArg { 1698 public: 1699 FullExprArg(Sema &actions) : E(0) { } 1700 1701 // FIXME: The const_cast here is ugly. RValue references would make this 1702 // much nicer (or we could duplicate a bunch of the move semantics 1703 // emulation code from Ownership.h). 1704 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 1705 1706 ExprResult release() { 1707 return move(E); 1708 } 1709 1710 Expr *get() const { return E; } 1711 1712 Expr *operator->() { 1713 return E; 1714 } 1715 1716 private: 1717 // FIXME: No need to make the entire Sema class a friend when it's just 1718 // Sema::MakeFullExpr that needs access to the constructor below. 1719 friend class Sema; 1720 1721 explicit FullExprArg(Expr *expr) : E(expr) {} 1722 1723 Expr *E; 1724 }; 1725 1726 FullExprArg MakeFullExpr(Expr *Arg) { 1727 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 1728 } 1729 1730 StmtResult ActOnExprStmt(FullExprArg Expr); 1731 1732 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 1733 bool LeadingEmptyMacro = false); 1734 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 1735 MultiStmtArg Elts, 1736 bool isStmtExpr); 1737 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 1738 SourceLocation StartLoc, 1739 SourceLocation EndLoc); 1740 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 1741 StmtResult ActOnForEachLValueExpr(Expr *E); 1742 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 1743 SourceLocation DotDotDotLoc, Expr *RHSVal, 1744 SourceLocation ColonLoc); 1745 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 1746 1747 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 1748 SourceLocation ColonLoc, 1749 Stmt *SubStmt, Scope *CurScope); 1750 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 1751 SourceLocation ColonLoc, Stmt *SubStmt); 1752 1753 StmtResult ActOnIfStmt(SourceLocation IfLoc, 1754 FullExprArg CondVal, Decl *CondVar, 1755 Stmt *ThenVal, 1756 SourceLocation ElseLoc, Stmt *ElseVal); 1757 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 1758 Expr *Cond, 1759 Decl *CondVar); 1760 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 1761 Stmt *Switch, Stmt *Body); 1762 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 1763 FullExprArg Cond, 1764 Decl *CondVar, Stmt *Body); 1765 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 1766 SourceLocation WhileLoc, 1767 SourceLocation CondLParen, Expr *Cond, 1768 SourceLocation CondRParen); 1769 1770 StmtResult ActOnForStmt(SourceLocation ForLoc, 1771 SourceLocation LParenLoc, 1772 Stmt *First, FullExprArg Second, 1773 Decl *SecondVar, 1774 FullExprArg Third, 1775 SourceLocation RParenLoc, 1776 Stmt *Body); 1777 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 1778 SourceLocation LParenLoc, 1779 Stmt *First, Expr *Second, 1780 SourceLocation RParenLoc, Stmt *Body); 1781 1782 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 1783 SourceLocation LabelLoc, 1784 LabelDecl *TheDecl); 1785 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 1786 SourceLocation StarLoc, 1787 Expr *DestExp); 1788 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 1789 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 1790 1791 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 1792 bool AllowFunctionParameters); 1793 1794 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 1795 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 1796 1797 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 1798 bool IsSimple, bool IsVolatile, 1799 unsigned NumOutputs, unsigned NumInputs, 1800 IdentifierInfo **Names, 1801 MultiExprArg Constraints, 1802 MultiExprArg Exprs, 1803 Expr *AsmString, 1804 MultiExprArg Clobbers, 1805 SourceLocation RParenLoc, 1806 bool MSAsm = false); 1807 1808 1809 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 1810 IdentifierInfo *Name, SourceLocation NameLoc, 1811 bool Invalid = false); 1812 1813 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 1814 1815 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 1816 Decl *Parm, Stmt *Body); 1817 1818 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 1819 1820 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 1821 MultiStmtArg Catch, Stmt *Finally); 1822 1823 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 1824 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 1825 Scope *CurScope); 1826 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 1827 Expr *SynchExpr, 1828 Stmt *SynchBody); 1829 1830 VarDecl *BuildExceptionDeclaration(Scope *S, 1831 TypeSourceInfo *TInfo, 1832 IdentifierInfo *Name, 1833 SourceLocation Loc); 1834 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 1835 1836 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 1837 Decl *ExDecl, Stmt *HandlerBlock); 1838 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 1839 MultiStmtArg Handlers); 1840 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 1841 1842 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 1843 1844 /// \brief If it's a file scoped decl that must warn if not used, keep track 1845 /// of it. 1846 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 1847 1848 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 1849 /// whose result is unused, warn. 1850 void DiagnoseUnusedExprResult(const Stmt *S); 1851 void DiagnoseUnusedDecl(const NamedDecl *ND); 1852 1853 ParsingDeclState PushParsingDeclaration() { 1854 return DelayedDiagnostics.pushParsingDecl(); 1855 } 1856 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 1857 DelayedDiagnostics::popParsingDecl(*this, state, decl); 1858 } 1859 1860 typedef ProcessingContextState ParsingClassState; 1861 ParsingClassState PushParsingClass() { 1862 return DelayedDiagnostics.pushContext(); 1863 } 1864 void PopParsingClass(ParsingClassState state) { 1865 DelayedDiagnostics.popContext(state); 1866 } 1867 1868 void EmitDeprecationWarning(NamedDecl *D, llvm::StringRef Message, 1869 SourceLocation Loc, bool UnknownObjCClass=false); 1870 1871 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 1872 1873 //===--------------------------------------------------------------------===// 1874 // Expression Parsing Callbacks: SemaExpr.cpp. 1875 1876 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 1877 bool UnknownObjCClass=false); 1878 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 1879 ObjCMethodDecl *Getter, 1880 SourceLocation Loc); 1881 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 1882 Expr **Args, unsigned NumArgs); 1883 1884 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 1885 1886 void PopExpressionEvaluationContext(); 1887 1888 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 1889 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 1890 void MarkDeclarationsReferencedInExpr(Expr *E); 1891 bool DiagRuntimeBehavior(SourceLocation Loc, const PartialDiagnostic &PD); 1892 1893 // Primary Expressions. 1894 SourceRange getExprRange(Expr *E) const; 1895 1896 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Name, 1897 bool HasTrailingLParen, bool IsAddressOfOperand); 1898 1899 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 1900 CorrectTypoContext CTC = CTC_Unknown); 1901 1902 ExprResult LookupInObjCMethod(LookupResult &R, Scope *S, IdentifierInfo *II, 1903 bool AllowBuiltinCreation=false); 1904 1905 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 1906 const DeclarationNameInfo &NameInfo, 1907 bool isAddressOfOperand, 1908 const TemplateArgumentListInfo *TemplateArgs); 1909 1910 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 1911 ExprValueKind VK, 1912 SourceLocation Loc, 1913 const CXXScopeSpec *SS = 0); 1914 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 1915 ExprValueKind VK, 1916 const DeclarationNameInfo &NameInfo, 1917 const CXXScopeSpec *SS = 0); 1918 ExprResult 1919 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 1920 SourceLocation nameLoc, 1921 IndirectFieldDecl *indirectField, 1922 Expr *baseObjectExpr = 0, 1923 SourceLocation opLoc = SourceLocation()); 1924 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 1925 LookupResult &R, 1926 const TemplateArgumentListInfo *TemplateArgs); 1927 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 1928 LookupResult &R, 1929 const TemplateArgumentListInfo *TemplateArgs, 1930 bool IsDefiniteInstance); 1931 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 1932 const LookupResult &R, 1933 bool HasTrailingLParen); 1934 1935 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 1936 const DeclarationNameInfo &NameInfo); 1937 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 1938 const DeclarationNameInfo &NameInfo, 1939 const TemplateArgumentListInfo *TemplateArgs); 1940 1941 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 1942 LookupResult &R, 1943 bool ADL); 1944 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 1945 const DeclarationNameInfo &NameInfo, 1946 NamedDecl *D); 1947 1948 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 1949 ExprResult ActOnNumericConstant(const Token &); 1950 ExprResult ActOnCharacterConstant(const Token &); 1951 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *Val); 1952 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 1953 SourceLocation R, 1954 MultiExprArg Val, 1955 ParsedType TypeOfCast = ParsedType()); 1956 1957 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 1958 /// fragments (e.g. "foo" "bar" L"baz"). 1959 ExprResult ActOnStringLiteral(const Token *Toks, unsigned NumToks); 1960 1961 // Binary/Unary Operators. 'Tok' is the token for the operator. 1962 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 1963 Expr *InputArg); 1964 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 1965 UnaryOperatorKind Opc, Expr *input); 1966 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 1967 tok::TokenKind Op, Expr *Input); 1968 1969 ExprResult CreateSizeOfAlignOfExpr(TypeSourceInfo *T, 1970 SourceLocation OpLoc, 1971 bool isSizeOf, SourceRange R); 1972 ExprResult CreateSizeOfAlignOfExpr(Expr *E, SourceLocation OpLoc, 1973 bool isSizeOf, SourceRange R); 1974 ExprResult 1975 ActOnSizeOfAlignOfExpr(SourceLocation OpLoc, bool isSizeof, bool isType, 1976 void *TyOrEx, const SourceRange &ArgRange); 1977 1978 ExprResult CheckPlaceholderExpr(Expr *E, SourceLocation Loc); 1979 1980 bool CheckSizeOfAlignOfOperand(QualType type, SourceLocation OpLoc, 1981 SourceRange R, bool isSizeof); 1982 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 1983 SourceLocation OpLoc, 1984 IdentifierInfo &Name, 1985 SourceLocation NameLoc, 1986 SourceLocation RParenLoc); 1987 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 1988 tok::TokenKind Kind, Expr *Input); 1989 1990 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 1991 Expr *Idx, SourceLocation RLoc); 1992 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 1993 Expr *Idx, SourceLocation RLoc); 1994 1995 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 1996 SourceLocation OpLoc, bool IsArrow, 1997 CXXScopeSpec &SS, 1998 NamedDecl *FirstQualifierInScope, 1999 const DeclarationNameInfo &NameInfo, 2000 const TemplateArgumentListInfo *TemplateArgs); 2001 2002 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2003 SourceLocation OpLoc, bool IsArrow, 2004 const CXXScopeSpec &SS, 2005 NamedDecl *FirstQualifierInScope, 2006 LookupResult &R, 2007 const TemplateArgumentListInfo *TemplateArgs, 2008 bool SuppressQualifierCheck = false); 2009 2010 ExprResult LookupMemberExpr(LookupResult &R, Expr *&Base, 2011 bool &IsArrow, SourceLocation OpLoc, 2012 CXXScopeSpec &SS, 2013 Decl *ObjCImpDecl, 2014 bool HasTemplateArgs); 2015 2016 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2017 const CXXScopeSpec &SS, 2018 const LookupResult &R); 2019 2020 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2021 bool IsArrow, SourceLocation OpLoc, 2022 const CXXScopeSpec &SS, 2023 NamedDecl *FirstQualifierInScope, 2024 const DeclarationNameInfo &NameInfo, 2025 const TemplateArgumentListInfo *TemplateArgs); 2026 2027 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2028 SourceLocation OpLoc, 2029 tok::TokenKind OpKind, 2030 CXXScopeSpec &SS, 2031 UnqualifiedId &Member, 2032 Decl *ObjCImpDecl, 2033 bool HasTrailingLParen); 2034 2035 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2036 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2037 FunctionDecl *FDecl, 2038 const FunctionProtoType *Proto, 2039 Expr **Args, unsigned NumArgs, 2040 SourceLocation RParenLoc); 2041 2042 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2043 /// This provides the location of the left/right parens and a list of comma 2044 /// locations. 2045 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2046 MultiExprArg Args, SourceLocation RParenLoc, 2047 Expr *ExecConfig = 0); 2048 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2049 SourceLocation LParenLoc, 2050 Expr **Args, unsigned NumArgs, 2051 SourceLocation RParenLoc, 2052 Expr *ExecConfig = 0); 2053 2054 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2055 MultiExprArg ExecConfig, SourceLocation GGGLoc); 2056 2057 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2058 ParsedType Ty, SourceLocation RParenLoc, 2059 Expr *Op); 2060 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2061 TypeSourceInfo *Ty, 2062 SourceLocation RParenLoc, 2063 Expr *Op); 2064 2065 bool TypeIsVectorType(ParsedType Ty) { 2066 return GetTypeFromParser(Ty)->isVectorType(); 2067 } 2068 2069 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2070 ExprResult ActOnCastOfParenListExpr(Scope *S, SourceLocation LParenLoc, 2071 SourceLocation RParenLoc, Expr *E, 2072 TypeSourceInfo *TInfo); 2073 2074 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2075 ParsedType Ty, 2076 SourceLocation RParenLoc, 2077 Expr *Op); 2078 2079 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2080 TypeSourceInfo *TInfo, 2081 SourceLocation RParenLoc, 2082 Expr *InitExpr); 2083 2084 ExprResult ActOnInitList(SourceLocation LParenLoc, 2085 MultiExprArg InitList, 2086 SourceLocation RParenLoc); 2087 2088 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2089 SourceLocation Loc, 2090 bool GNUSyntax, 2091 ExprResult Init); 2092 2093 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2094 tok::TokenKind Kind, Expr *LHS, Expr *RHS); 2095 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2096 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2097 ExprResult CreateBuiltinBinOp(SourceLocation TokLoc, 2098 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2099 2100 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2101 /// in the case of a the GNU conditional expr extension. 2102 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2103 SourceLocation ColonLoc, 2104 Expr *Cond, Expr *LHS, Expr *RHS); 2105 2106 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2107 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2108 LabelDecl *LD); 2109 2110 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2111 SourceLocation RPLoc); // "({..})" 2112 2113 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2114 struct OffsetOfComponent { 2115 SourceLocation LocStart, LocEnd; 2116 bool isBrackets; // true if [expr], false if .ident 2117 union { 2118 IdentifierInfo *IdentInfo; 2119 ExprTy *E; 2120 } U; 2121 }; 2122 2123 /// __builtin_offsetof(type, a.b[123][456].c) 2124 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2125 TypeSourceInfo *TInfo, 2126 OffsetOfComponent *CompPtr, 2127 unsigned NumComponents, 2128 SourceLocation RParenLoc); 2129 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2130 SourceLocation BuiltinLoc, 2131 SourceLocation TypeLoc, 2132 ParsedType Arg1, 2133 OffsetOfComponent *CompPtr, 2134 unsigned NumComponents, 2135 SourceLocation RParenLoc); 2136 2137 // __builtin_choose_expr(constExpr, expr1, expr2) 2138 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2139 Expr *cond, Expr *expr1, 2140 Expr *expr2, SourceLocation RPLoc); 2141 2142 // __builtin_va_arg(expr, type) 2143 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, 2144 Expr *expr, ParsedType type, 2145 SourceLocation RPLoc); 2146 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, 2147 Expr *expr, TypeSourceInfo *TInfo, 2148 SourceLocation RPLoc); 2149 2150 // __null 2151 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2152 2153 //===------------------------- "Block" Extension ------------------------===// 2154 2155 /// ActOnBlockStart - This callback is invoked when a block literal is 2156 /// started. 2157 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2158 2159 /// ActOnBlockArguments - This callback allows processing of block arguments. 2160 /// If there are no arguments, this is still invoked. 2161 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2162 2163 /// ActOnBlockError - If there is an error parsing a block, this callback 2164 /// is invoked to pop the information about the block from the action impl. 2165 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2166 2167 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2168 /// literal was successfully completed. ^(int x){...} 2169 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, 2170 Stmt *Body, Scope *CurScope); 2171 2172 //===---------------------------- C++ Features --------------------------===// 2173 2174 // Act on C++ namespaces 2175 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2176 SourceLocation IdentLoc, 2177 IdentifierInfo *Ident, 2178 SourceLocation LBrace, 2179 AttributeList *AttrList); 2180 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2181 2182 NamespaceDecl *getStdNamespace() const; 2183 NamespaceDecl *getOrCreateStdNamespace(); 2184 2185 CXXRecordDecl *getStdBadAlloc() const; 2186 2187 Decl *ActOnUsingDirective(Scope *CurScope, 2188 SourceLocation UsingLoc, 2189 SourceLocation NamespcLoc, 2190 CXXScopeSpec &SS, 2191 SourceLocation IdentLoc, 2192 IdentifierInfo *NamespcName, 2193 AttributeList *AttrList); 2194 2195 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2196 2197 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2198 SourceLocation NamespaceLoc, 2199 SourceLocation AliasLoc, 2200 IdentifierInfo *Alias, 2201 CXXScopeSpec &SS, 2202 SourceLocation IdentLoc, 2203 IdentifierInfo *Ident); 2204 2205 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2206 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2207 const LookupResult &PreviousDecls); 2208 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2209 NamedDecl *Target); 2210 2211 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2212 bool isTypeName, 2213 const CXXScopeSpec &SS, 2214 SourceLocation NameLoc, 2215 const LookupResult &Previous); 2216 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2217 const CXXScopeSpec &SS, 2218 SourceLocation NameLoc); 2219 2220 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2221 SourceLocation UsingLoc, 2222 CXXScopeSpec &SS, 2223 const DeclarationNameInfo &NameInfo, 2224 AttributeList *AttrList, 2225 bool IsInstantiation, 2226 bool IsTypeName, 2227 SourceLocation TypenameLoc); 2228 2229 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2230 2231 Decl *ActOnUsingDeclaration(Scope *CurScope, 2232 AccessSpecifier AS, 2233 bool HasUsingKeyword, 2234 SourceLocation UsingLoc, 2235 CXXScopeSpec &SS, 2236 UnqualifiedId &Name, 2237 AttributeList *AttrList, 2238 bool IsTypeName, 2239 SourceLocation TypenameLoc); 2240 2241 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2242 /// ActOnDeclarator, when a C++ direct initializer is present. 2243 /// e.g: "int x(1);" 2244 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2245 SourceLocation LParenLoc, 2246 MultiExprArg Exprs, 2247 SourceLocation RParenLoc, 2248 bool TypeMayContainAuto); 2249 2250 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2251 /// and sets it as the initializer for the the passed in VarDecl. 2252 bool InitializeVarWithConstructor(VarDecl *VD, 2253 CXXConstructorDecl *Constructor, 2254 MultiExprArg Exprs); 2255 2256 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2257 /// including handling of its default argument expressions. 2258 /// 2259 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2260 ExprResult 2261 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2262 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2263 bool RequiresZeroInit, unsigned ConstructKind, 2264 SourceRange ParenRange); 2265 2266 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2267 // the constructor can be elidable? 2268 ExprResult 2269 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2270 CXXConstructorDecl *Constructor, bool Elidable, 2271 MultiExprArg Exprs, bool RequiresZeroInit, 2272 unsigned ConstructKind, 2273 SourceRange ParenRange); 2274 2275 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2276 /// the default expr if needed. 2277 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2278 FunctionDecl *FD, 2279 ParmVarDecl *Param); 2280 2281 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2282 /// constructed variable. 2283 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2284 2285 /// \brief Declare the implicit default constructor for the given class. 2286 /// 2287 /// \param ClassDecl The class declaration into which the implicit 2288 /// default constructor will be added. 2289 /// 2290 /// \returns The implicitly-declared default constructor. 2291 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2292 CXXRecordDecl *ClassDecl); 2293 2294 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2295 /// defining this constructor as the default constructor. 2296 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2297 CXXConstructorDecl *Constructor); 2298 2299 /// \brief Declare the implicit destructor for the given class. 2300 /// 2301 /// \param ClassDecl The class declaration into which the implicit 2302 /// destructor will be added. 2303 /// 2304 /// \returns The implicitly-declared destructor. 2305 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2306 2307 /// DefineImplicitDestructor - Checks for feasibility of 2308 /// defining this destructor as the default destructor. 2309 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2310 CXXDestructorDecl *Destructor); 2311 2312 /// \brief Declare all inherited constructors for the given class. 2313 /// 2314 /// \param ClassDecl The class declaration into which the inherited 2315 /// constructors will be added. 2316 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2317 2318 /// \brief Declare the implicit copy constructor for the given class. 2319 /// 2320 /// \param S The scope of the class, which may be NULL if this is a 2321 /// template instantiation. 2322 /// 2323 /// \param ClassDecl The class declaration into which the implicit 2324 /// copy constructor will be added. 2325 /// 2326 /// \returns The implicitly-declared copy constructor. 2327 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2328 2329 /// DefineImplicitCopyConstructor - Checks for feasibility of 2330 /// defining this constructor as the copy constructor. 2331 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2332 CXXConstructorDecl *Constructor, 2333 unsigned TypeQuals); 2334 2335 /// \brief Declare the implicit copy assignment operator for the given class. 2336 /// 2337 /// \param S The scope of the class, which may be NULL if this is a 2338 /// template instantiation. 2339 /// 2340 /// \param ClassDecl The class declaration into which the implicit 2341 /// copy-assignment operator will be added. 2342 /// 2343 /// \returns The implicitly-declared copy assignment operator. 2344 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2345 2346 /// \brief Defined an implicitly-declared copy assignment operator. 2347 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2348 CXXMethodDecl *MethodDecl); 2349 2350 /// \brief Force the declaration of any implicitly-declared members of this 2351 /// class. 2352 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2353 2354 /// MaybeBindToTemporary - If the passed in expression has a record type with 2355 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 2356 /// it simply returns the passed in expression. 2357 ExprResult MaybeBindToTemporary(Expr *E); 2358 2359 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 2360 MultiExprArg ArgsPtr, 2361 SourceLocation Loc, 2362 ASTOwningVector<Expr*> &ConvertedArgs); 2363 2364 ParsedType getDestructorName(SourceLocation TildeLoc, 2365 IdentifierInfo &II, SourceLocation NameLoc, 2366 Scope *S, CXXScopeSpec &SS, 2367 ParsedType ObjectType, 2368 bool EnteringContext); 2369 2370 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 2371 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 2372 tok::TokenKind Kind, 2373 SourceLocation LAngleBracketLoc, 2374 ParsedType Ty, 2375 SourceLocation RAngleBracketLoc, 2376 SourceLocation LParenLoc, 2377 Expr *E, 2378 SourceLocation RParenLoc); 2379 2380 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 2381 tok::TokenKind Kind, 2382 TypeSourceInfo *Ty, 2383 Expr *E, 2384 SourceRange AngleBrackets, 2385 SourceRange Parens); 2386 2387 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2388 SourceLocation TypeidLoc, 2389 TypeSourceInfo *Operand, 2390 SourceLocation RParenLoc); 2391 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2392 SourceLocation TypeidLoc, 2393 Expr *Operand, 2394 SourceLocation RParenLoc); 2395 2396 /// ActOnCXXTypeid - Parse typeid( something ). 2397 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 2398 SourceLocation LParenLoc, bool isType, 2399 void *TyOrExpr, 2400 SourceLocation RParenLoc); 2401 2402 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2403 SourceLocation TypeidLoc, 2404 TypeSourceInfo *Operand, 2405 SourceLocation RParenLoc); 2406 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2407 SourceLocation TypeidLoc, 2408 Expr *Operand, 2409 SourceLocation RParenLoc); 2410 2411 /// ActOnCXXUuidof - Parse __uuidof( something ). 2412 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 2413 SourceLocation LParenLoc, bool isType, 2414 void *TyOrExpr, 2415 SourceLocation RParenLoc); 2416 2417 2418 //// ActOnCXXThis - Parse 'this' pointer. 2419 ExprResult ActOnCXXThis(SourceLocation loc); 2420 2421 /// tryCaptureCXXThis - Try to capture a 'this' pointer. Returns a 2422 /// pointer to an instance method whose 'this' pointer is 2423 /// capturable, or null if this is not possible. 2424 CXXMethodDecl *tryCaptureCXXThis(); 2425 2426 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 2427 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 2428 2429 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 2430 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 2431 2432 //// ActOnCXXThrow - Parse throw expressions. 2433 ExprResult ActOnCXXThrow(SourceLocation OpLoc, Expr *expr); 2434 bool CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *&E); 2435 2436 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 2437 /// Can be interpreted either as function-style casting ("int(x)") 2438 /// or class type construction ("ClassType(x,y,z)") 2439 /// or creation of a value-initialized type ("int()"). 2440 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 2441 SourceLocation LParenLoc, 2442 MultiExprArg Exprs, 2443 SourceLocation RParenLoc); 2444 2445 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 2446 SourceLocation LParenLoc, 2447 MultiExprArg Exprs, 2448 SourceLocation RParenLoc); 2449 2450 /// ActOnCXXNew - Parsed a C++ 'new' expression. 2451 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 2452 SourceLocation PlacementLParen, 2453 MultiExprArg PlacementArgs, 2454 SourceLocation PlacementRParen, 2455 SourceRange TypeIdParens, Declarator &D, 2456 SourceLocation ConstructorLParen, 2457 MultiExprArg ConstructorArgs, 2458 SourceLocation ConstructorRParen); 2459 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 2460 SourceLocation PlacementLParen, 2461 MultiExprArg PlacementArgs, 2462 SourceLocation PlacementRParen, 2463 SourceRange TypeIdParens, 2464 QualType AllocType, 2465 TypeSourceInfo *AllocTypeInfo, 2466 Expr *ArraySize, 2467 SourceLocation ConstructorLParen, 2468 MultiExprArg ConstructorArgs, 2469 SourceLocation ConstructorRParen, 2470 bool TypeMayContainAuto = true); 2471 2472 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 2473 SourceRange R); 2474 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 2475 bool UseGlobal, QualType AllocType, bool IsArray, 2476 Expr **PlaceArgs, unsigned NumPlaceArgs, 2477 FunctionDecl *&OperatorNew, 2478 FunctionDecl *&OperatorDelete); 2479 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 2480 DeclarationName Name, Expr** Args, 2481 unsigned NumArgs, DeclContext *Ctx, 2482 bool AllowMissing, FunctionDecl *&Operator); 2483 void DeclareGlobalNewDelete(); 2484 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 2485 QualType Argument, 2486 bool addMallocAttr = false); 2487 2488 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 2489 DeclarationName Name, FunctionDecl* &Operator); 2490 2491 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 2492 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 2493 bool UseGlobal, bool ArrayForm, 2494 Expr *Operand); 2495 2496 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 2497 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 2498 SourceLocation StmtLoc, 2499 bool ConvertToBoolean); 2500 2501 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 2502 Expr *Operand, SourceLocation RParen); 2503 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 2504 SourceLocation RParen); 2505 2506 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 2507 /// pseudo-functions. 2508 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 2509 SourceLocation KWLoc, 2510 ParsedType Ty, 2511 SourceLocation RParen); 2512 2513 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 2514 SourceLocation KWLoc, 2515 TypeSourceInfo *T, 2516 SourceLocation RParen); 2517 2518 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 2519 /// pseudo-functions. 2520 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 2521 SourceLocation KWLoc, 2522 ParsedType LhsTy, 2523 ParsedType RhsTy, 2524 SourceLocation RParen); 2525 2526 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 2527 SourceLocation KWLoc, 2528 TypeSourceInfo *LhsT, 2529 TypeSourceInfo *RhsT, 2530 SourceLocation RParen); 2531 2532 ExprResult ActOnStartCXXMemberReference(Scope *S, 2533 Expr *Base, 2534 SourceLocation OpLoc, 2535 tok::TokenKind OpKind, 2536 ParsedType &ObjectType, 2537 bool &MayBePseudoDestructor); 2538 2539 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 2540 2541 ExprResult BuildPseudoDestructorExpr(Expr *Base, 2542 SourceLocation OpLoc, 2543 tok::TokenKind OpKind, 2544 const CXXScopeSpec &SS, 2545 TypeSourceInfo *ScopeType, 2546 SourceLocation CCLoc, 2547 SourceLocation TildeLoc, 2548 PseudoDestructorTypeStorage DestroyedType, 2549 bool HasTrailingLParen); 2550 2551 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 2552 SourceLocation OpLoc, 2553 tok::TokenKind OpKind, 2554 CXXScopeSpec &SS, 2555 UnqualifiedId &FirstTypeName, 2556 SourceLocation CCLoc, 2557 SourceLocation TildeLoc, 2558 UnqualifiedId &SecondTypeName, 2559 bool HasTrailingLParen); 2560 2561 /// MaybeCreateExprWithCleanups - If the current full-expression 2562 /// requires any cleanups, surround it with a ExprWithCleanups node. 2563 /// Otherwise, just returns the passed-in expression. 2564 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 2565 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 2566 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 2567 2568 ExprResult ActOnFinishFullExpr(Expr *Expr); 2569 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 2570 2571 // Marks SS invalid if it represents an incomplete type. 2572 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 2573 2574 DeclContext *computeDeclContext(QualType T); 2575 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 2576 bool EnteringContext = false); 2577 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 2578 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 2579 bool isUnknownSpecialization(const CXXScopeSpec &SS); 2580 2581 /// ActOnCXXGlobalScopeSpecifier - Return the object that represents the 2582 /// global scope ('::'). 2583 NestedNameSpecifier * 2584 ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc); 2585 2586 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 2587 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 2588 2589 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 2590 SourceLocation IdLoc, 2591 IdentifierInfo &II, 2592 ParsedType ObjectType); 2593 2594 NestedNameSpecifier *BuildCXXNestedNameSpecifier(Scope *S, 2595 CXXScopeSpec &SS, 2596 SourceLocation IdLoc, 2597 SourceLocation CCLoc, 2598 IdentifierInfo &II, 2599 QualType ObjectType, 2600 NamedDecl *ScopeLookupResult, 2601 bool EnteringContext, 2602 bool ErrorRecoveryLookup); 2603 2604 NestedNameSpecifier *ActOnCXXNestedNameSpecifier(Scope *S, 2605 CXXScopeSpec &SS, 2606 SourceLocation IdLoc, 2607 SourceLocation CCLoc, 2608 IdentifierInfo &II, 2609 ParsedType ObjectType, 2610 bool EnteringContext); 2611 2612 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 2613 IdentifierInfo &II, 2614 ParsedType ObjectType, 2615 bool EnteringContext); 2616 2617 /// ActOnCXXNestedNameSpecifier - Called during parsing of a 2618 /// nested-name-specifier that involves a template-id, e.g., 2619 /// "foo::bar<int, float>::", and now we need to build a scope 2620 /// specifier. \p SS is empty or the previously parsed nested-name 2621 /// part ("foo::"), \p Type is the already-parsed class template 2622 /// specialization (or other template-id that names a type), \p 2623 /// TypeRange is the source range where the type is located, and \p 2624 /// CCLoc is the location of the trailing '::'. 2625 CXXScopeTy *ActOnCXXNestedNameSpecifier(Scope *S, 2626 const CXXScopeSpec &SS, 2627 ParsedType Type, 2628 SourceRange TypeRange, 2629 SourceLocation CCLoc); 2630 2631 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 2632 2633 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 2634 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 2635 /// After this method is called, according to [C++ 3.4.3p3], names should be 2636 /// looked up in the declarator-id's scope, until the declarator is parsed and 2637 /// ActOnCXXExitDeclaratorScope is called. 2638 /// The 'SS' should be a non-empty valid CXXScopeSpec. 2639 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 2640 2641 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 2642 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 2643 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 2644 /// Used to indicate that names should revert to being looked up in the 2645 /// defining scope. 2646 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 2647 2648 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 2649 /// initializer for the declaration 'Dcl'. 2650 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 2651 /// static data member of class X, names should be looked up in the scope of 2652 /// class X. 2653 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 2654 2655 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 2656 /// initializer for the declaration 'Dcl'. 2657 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 2658 2659 // ParseObjCStringLiteral - Parse Objective-C string literals. 2660 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 2661 Expr **Strings, 2662 unsigned NumStrings); 2663 2664 Expr *BuildObjCEncodeExpression(SourceLocation AtLoc, 2665 TypeSourceInfo *EncodedTypeInfo, 2666 SourceLocation RParenLoc); 2667 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 2668 CXXMethodDecl *Method); 2669 2670 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 2671 SourceLocation EncodeLoc, 2672 SourceLocation LParenLoc, 2673 ParsedType Ty, 2674 SourceLocation RParenLoc); 2675 2676 // ParseObjCSelectorExpression - Build selector expression for @selector 2677 ExprResult ParseObjCSelectorExpression(Selector Sel, 2678 SourceLocation AtLoc, 2679 SourceLocation SelLoc, 2680 SourceLocation LParenLoc, 2681 SourceLocation RParenLoc); 2682 2683 // ParseObjCProtocolExpression - Build protocol expression for @protocol 2684 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 2685 SourceLocation AtLoc, 2686 SourceLocation ProtoLoc, 2687 SourceLocation LParenLoc, 2688 SourceLocation RParenLoc); 2689 2690 //===--------------------------------------------------------------------===// 2691 // C++ Declarations 2692 // 2693 Decl *ActOnStartLinkageSpecification(Scope *S, 2694 SourceLocation ExternLoc, 2695 SourceLocation LangLoc, 2696 llvm::StringRef Lang, 2697 SourceLocation LBraceLoc); 2698 Decl *ActOnFinishLinkageSpecification(Scope *S, 2699 Decl *LinkageSpec, 2700 SourceLocation RBraceLoc); 2701 2702 2703 //===--------------------------------------------------------------------===// 2704 // C++ Classes 2705 // 2706 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 2707 const CXXScopeSpec *SS = 0); 2708 2709 Decl *ActOnAccessSpecifier(AccessSpecifier Access, 2710 SourceLocation ASLoc, 2711 SourceLocation ColonLoc); 2712 2713 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 2714 Declarator &D, 2715 MultiTemplateParamsArg TemplateParameterLists, 2716 Expr *BitfieldWidth, const VirtSpecifiers &VS, 2717 Expr *Init, bool IsDefinition, 2718 bool Deleted = false); 2719 2720 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 2721 Scope *S, 2722 CXXScopeSpec &SS, 2723 IdentifierInfo *MemberOrBase, 2724 ParsedType TemplateTypeTy, 2725 SourceLocation IdLoc, 2726 SourceLocation LParenLoc, 2727 Expr **Args, unsigned NumArgs, 2728 SourceLocation RParenLoc, 2729 SourceLocation EllipsisLoc); 2730 2731 MemInitResult BuildMemberInitializer(ValueDecl *Member, Expr **Args, 2732 unsigned NumArgs, SourceLocation IdLoc, 2733 SourceLocation LParenLoc, 2734 SourceLocation RParenLoc); 2735 2736 MemInitResult BuildBaseInitializer(QualType BaseType, 2737 TypeSourceInfo *BaseTInfo, 2738 Expr **Args, unsigned NumArgs, 2739 SourceLocation LParenLoc, 2740 SourceLocation RParenLoc, 2741 CXXRecordDecl *ClassDecl, 2742 SourceLocation EllipsisLoc); 2743 2744 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 2745 Expr **Args, unsigned NumArgs, 2746 SourceLocation RParenLoc, 2747 SourceLocation LParenLoc, 2748 CXXRecordDecl *ClassDecl, 2749 SourceLocation EllipsisLoc); 2750 2751 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 2752 CXXCtorInitializer **Initializers, 2753 unsigned NumInitializers, bool AnyErrors); 2754 2755 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 2756 2757 2758 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 2759 /// mark all the non-trivial destructors of its members and bases as 2760 /// referenced. 2761 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 2762 CXXRecordDecl *Record); 2763 2764 /// \brief The list of classes whose vtables have been used within 2765 /// this translation unit, and the source locations at which the 2766 /// first use occurred. 2767 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 2768 2769 /// \brief The list of vtables that are required but have not yet been 2770 /// materialized. 2771 llvm::SmallVector<VTableUse, 16> VTableUses; 2772 2773 /// \brief The set of classes whose vtables have been used within 2774 /// this translation unit, and a bit that will be true if the vtable is 2775 /// required to be emitted (otherwise, it should be emitted only if needed 2776 /// by code generation). 2777 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 2778 2779 /// \brief A list of all of the dynamic classes in this translation 2780 /// unit. 2781 llvm::SmallVector<CXXRecordDecl *, 16> DynamicClasses; 2782 2783 /// \brief Note that the vtable for the given class was used at the 2784 /// given location. 2785 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 2786 bool DefinitionRequired = false); 2787 2788 /// MarkVirtualMembersReferenced - Will mark all members of the given 2789 /// CXXRecordDecl referenced. 2790 void MarkVirtualMembersReferenced(SourceLocation Loc, 2791 const CXXRecordDecl *RD); 2792 2793 /// \brief Define all of the vtables that have been used in this 2794 /// translation unit and reference any virtual members used by those 2795 /// vtables. 2796 /// 2797 /// \returns true if any work was done, false otherwise. 2798 bool DefineUsedVTables(); 2799 2800 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 2801 2802 void ActOnMemInitializers(Decl *ConstructorDecl, 2803 SourceLocation ColonLoc, 2804 MemInitTy **MemInits, unsigned NumMemInits, 2805 bool AnyErrors); 2806 2807 void CheckCompletedCXXClass(CXXRecordDecl *Record); 2808 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 2809 Decl *TagDecl, 2810 SourceLocation LBrac, 2811 SourceLocation RBrac, 2812 AttributeList *AttrList); 2813 2814 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 2815 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 2816 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 2817 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 2818 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 2819 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 2820 2821 Decl *ActOnStaticAssertDeclaration(SourceLocation AssertLoc, 2822 Expr *AssertExpr, 2823 Expr *AssertMessageExpr); 2824 2825 FriendDecl *CheckFriendTypeDecl(SourceLocation FriendLoc, 2826 TypeSourceInfo *TSInfo); 2827 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 2828 MultiTemplateParamsArg TemplateParams); 2829 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, bool IsDefinition, 2830 MultiTemplateParamsArg TemplateParams); 2831 2832 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 2833 StorageClass& SC); 2834 void CheckConstructor(CXXConstructorDecl *Constructor); 2835 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 2836 StorageClass& SC); 2837 bool CheckDestructor(CXXDestructorDecl *Destructor); 2838 void CheckConversionDeclarator(Declarator &D, QualType &R, 2839 StorageClass& SC); 2840 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 2841 2842 //===--------------------------------------------------------------------===// 2843 // C++ Derived Classes 2844 // 2845 2846 /// ActOnBaseSpecifier - Parsed a base specifier 2847 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 2848 SourceRange SpecifierRange, 2849 bool Virtual, AccessSpecifier Access, 2850 TypeSourceInfo *TInfo, 2851 SourceLocation EllipsisLoc); 2852 2853 BaseResult ActOnBaseSpecifier(Decl *classdecl, 2854 SourceRange SpecifierRange, 2855 bool Virtual, AccessSpecifier Access, 2856 ParsedType basetype, 2857 SourceLocation BaseLoc, 2858 SourceLocation EllipsisLoc); 2859 2860 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 2861 unsigned NumBases); 2862 void ActOnBaseSpecifiers(Decl *ClassDecl, BaseTy **Bases, unsigned NumBases); 2863 2864 bool IsDerivedFrom(QualType Derived, QualType Base); 2865 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 2866 2867 // FIXME: I don't like this name. 2868 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 2869 2870 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 2871 2872 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 2873 SourceLocation Loc, SourceRange Range, 2874 CXXCastPath *BasePath = 0, 2875 bool IgnoreAccess = false); 2876 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 2877 unsigned InaccessibleBaseID, 2878 unsigned AmbigiousBaseConvID, 2879 SourceLocation Loc, SourceRange Range, 2880 DeclarationName Name, 2881 CXXCastPath *BasePath); 2882 2883 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 2884 2885 /// CheckOverridingFunctionReturnType - Checks whether the return types are 2886 /// covariant, according to C++ [class.virtual]p5. 2887 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 2888 const CXXMethodDecl *Old); 2889 2890 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 2891 /// spec is a subset of base spec. 2892 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 2893 const CXXMethodDecl *Old); 2894 2895 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 2896 2897 /// CheckOverrideControl - Check C++0x override control semantics. 2898 void CheckOverrideControl(const Decl *D); 2899 2900 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 2901 /// overrides a virtual member function marked 'final', according to 2902 /// C++0x [class.virtual]p3. 2903 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 2904 const CXXMethodDecl *Old); 2905 2906 2907 //===--------------------------------------------------------------------===// 2908 // C++ Access Control 2909 // 2910 2911 enum AccessResult { 2912 AR_accessible, 2913 AR_inaccessible, 2914 AR_dependent, 2915 AR_delayed 2916 }; 2917 2918 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 2919 NamedDecl *PrevMemberDecl, 2920 AccessSpecifier LexicalAS); 2921 2922 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 2923 DeclAccessPair FoundDecl); 2924 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 2925 DeclAccessPair FoundDecl); 2926 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 2927 SourceRange PlacementRange, 2928 CXXRecordDecl *NamingClass, 2929 DeclAccessPair FoundDecl); 2930 AccessResult CheckConstructorAccess(SourceLocation Loc, 2931 CXXConstructorDecl *D, 2932 const InitializedEntity &Entity, 2933 AccessSpecifier Access, 2934 bool IsCopyBindingRefToTemp = false); 2935 AccessResult CheckDestructorAccess(SourceLocation Loc, 2936 CXXDestructorDecl *Dtor, 2937 const PartialDiagnostic &PDiag); 2938 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 2939 NamedDecl *D, 2940 const PartialDiagnostic &PDiag); 2941 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 2942 Expr *ObjectExpr, 2943 Expr *ArgExpr, 2944 DeclAccessPair FoundDecl); 2945 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 2946 DeclAccessPair FoundDecl); 2947 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 2948 QualType Base, QualType Derived, 2949 const CXXBasePath &Path, 2950 unsigned DiagID, 2951 bool ForceCheck = false, 2952 bool ForceUnprivileged = false); 2953 void CheckLookupAccess(const LookupResult &R); 2954 2955 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 2956 const MultiLevelTemplateArgumentList &TemplateArgs); 2957 void PerformDependentDiagnostics(const DeclContext *Pattern, 2958 const MultiLevelTemplateArgumentList &TemplateArgs); 2959 2960 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2961 2962 /// A flag to suppress access checking. 2963 bool SuppressAccessChecking; 2964 2965 /// \brief When true, access checking violations are treated as SFINAE 2966 /// failures rather than hard errors. 2967 bool AccessCheckingSFINAE; 2968 2969 void ActOnStartSuppressingAccessChecks(); 2970 void ActOnStopSuppressingAccessChecks(); 2971 2972 enum AbstractDiagSelID { 2973 AbstractNone = -1, 2974 AbstractReturnType, 2975 AbstractParamType, 2976 AbstractVariableType, 2977 AbstractFieldType, 2978 AbstractArrayType 2979 }; 2980 2981 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 2982 const PartialDiagnostic &PD); 2983 void DiagnoseAbstractType(const CXXRecordDecl *RD); 2984 2985 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 2986 AbstractDiagSelID SelID = AbstractNone); 2987 2988 //===--------------------------------------------------------------------===// 2989 // C++ Overloaded Operators [C++ 13.5] 2990 // 2991 2992 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 2993 2994 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 2995 2996 //===--------------------------------------------------------------------===// 2997 // C++ Templates [C++ 14] 2998 // 2999 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3000 QualType ObjectType, bool EnteringContext, 3001 bool &MemberOfUnknownSpecialization); 3002 3003 TemplateNameKind isTemplateName(Scope *S, 3004 CXXScopeSpec &SS, 3005 bool hasTemplateKeyword, 3006 UnqualifiedId &Name, 3007 ParsedType ObjectType, 3008 bool EnteringContext, 3009 TemplateTy &Template, 3010 bool &MemberOfUnknownSpecialization); 3011 3012 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3013 SourceLocation IILoc, 3014 Scope *S, 3015 const CXXScopeSpec *SS, 3016 TemplateTy &SuggestedTemplate, 3017 TemplateNameKind &SuggestedKind); 3018 3019 bool DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3020 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3021 3022 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3023 SourceLocation EllipsisLoc, 3024 SourceLocation KeyLoc, 3025 IdentifierInfo *ParamName, 3026 SourceLocation ParamNameLoc, 3027 unsigned Depth, unsigned Position, 3028 SourceLocation EqualLoc, 3029 ParsedType DefaultArg); 3030 3031 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3032 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3033 unsigned Depth, 3034 unsigned Position, 3035 SourceLocation EqualLoc, 3036 Expr *DefaultArg); 3037 Decl *ActOnTemplateTemplateParameter(Scope *S, 3038 SourceLocation TmpLoc, 3039 TemplateParamsTy *Params, 3040 SourceLocation EllipsisLoc, 3041 IdentifierInfo *ParamName, 3042 SourceLocation ParamNameLoc, 3043 unsigned Depth, 3044 unsigned Position, 3045 SourceLocation EqualLoc, 3046 ParsedTemplateArgument DefaultArg); 3047 3048 TemplateParamsTy * 3049 ActOnTemplateParameterList(unsigned Depth, 3050 SourceLocation ExportLoc, 3051 SourceLocation TemplateLoc, 3052 SourceLocation LAngleLoc, 3053 Decl **Params, unsigned NumParams, 3054 SourceLocation RAngleLoc); 3055 3056 /// \brief The context in which we are checking a template parameter 3057 /// list. 3058 enum TemplateParamListContext { 3059 TPC_ClassTemplate, 3060 TPC_FunctionTemplate, 3061 TPC_ClassTemplateMember, 3062 TPC_FriendFunctionTemplate, 3063 TPC_FriendFunctionTemplateDefinition 3064 }; 3065 3066 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3067 TemplateParameterList *OldParams, 3068 TemplateParamListContext TPC); 3069 TemplateParameterList * 3070 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3071 const CXXScopeSpec &SS, 3072 TemplateParameterList **ParamLists, 3073 unsigned NumParamLists, 3074 bool IsFriend, 3075 bool &IsExplicitSpecialization, 3076 bool &Invalid); 3077 3078 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3079 SourceLocation KWLoc, CXXScopeSpec &SS, 3080 IdentifierInfo *Name, SourceLocation NameLoc, 3081 AttributeList *Attr, 3082 TemplateParameterList *TemplateParams, 3083 AccessSpecifier AS); 3084 3085 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3086 TemplateArgumentListInfo &Out); 3087 3088 QualType CheckTemplateIdType(TemplateName Template, 3089 SourceLocation TemplateLoc, 3090 const TemplateArgumentListInfo &TemplateArgs); 3091 3092 TypeResult 3093 ActOnTemplateIdType(TemplateTy Template, SourceLocation TemplateLoc, 3094 SourceLocation LAngleLoc, 3095 ASTTemplateArgsPtr TemplateArgs, 3096 SourceLocation RAngleLoc); 3097 3098 TypeResult ActOnTagTemplateIdType(CXXScopeSpec &SS, 3099 TypeResult Type, 3100 TagUseKind TUK, 3101 TypeSpecifierType TagSpec, 3102 SourceLocation TagLoc); 3103 3104 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3105 LookupResult &R, 3106 bool RequiresADL, 3107 const TemplateArgumentListInfo &TemplateArgs); 3108 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3109 const DeclarationNameInfo &NameInfo, 3110 const TemplateArgumentListInfo &TemplateArgs); 3111 3112 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3113 SourceLocation TemplateKWLoc, 3114 CXXScopeSpec &SS, 3115 UnqualifiedId &Name, 3116 ParsedType ObjectType, 3117 bool EnteringContext, 3118 TemplateTy &Template); 3119 3120 DeclResult 3121 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3122 SourceLocation KWLoc, 3123 CXXScopeSpec &SS, 3124 TemplateTy Template, 3125 SourceLocation TemplateNameLoc, 3126 SourceLocation LAngleLoc, 3127 ASTTemplateArgsPtr TemplateArgs, 3128 SourceLocation RAngleLoc, 3129 AttributeList *Attr, 3130 MultiTemplateParamsArg TemplateParameterLists); 3131 3132 Decl *ActOnTemplateDeclarator(Scope *S, 3133 MultiTemplateParamsArg TemplateParameterLists, 3134 Declarator &D); 3135 3136 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3137 MultiTemplateParamsArg TemplateParameterLists, 3138 Declarator &D); 3139 3140 bool 3141 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3142 TemplateSpecializationKind NewTSK, 3143 NamedDecl *PrevDecl, 3144 TemplateSpecializationKind PrevTSK, 3145 SourceLocation PrevPtOfInstantiation, 3146 bool &SuppressNew); 3147 3148 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3149 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3150 LookupResult &Previous); 3151 3152 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 3153 const TemplateArgumentListInfo *ExplicitTemplateArgs, 3154 LookupResult &Previous); 3155 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 3156 3157 DeclResult 3158 ActOnExplicitInstantiation(Scope *S, 3159 SourceLocation ExternLoc, 3160 SourceLocation TemplateLoc, 3161 unsigned TagSpec, 3162 SourceLocation KWLoc, 3163 const CXXScopeSpec &SS, 3164 TemplateTy Template, 3165 SourceLocation TemplateNameLoc, 3166 SourceLocation LAngleLoc, 3167 ASTTemplateArgsPtr TemplateArgs, 3168 SourceLocation RAngleLoc, 3169 AttributeList *Attr); 3170 3171 DeclResult 3172 ActOnExplicitInstantiation(Scope *S, 3173 SourceLocation ExternLoc, 3174 SourceLocation TemplateLoc, 3175 unsigned TagSpec, 3176 SourceLocation KWLoc, 3177 CXXScopeSpec &SS, 3178 IdentifierInfo *Name, 3179 SourceLocation NameLoc, 3180 AttributeList *Attr); 3181 3182 DeclResult ActOnExplicitInstantiation(Scope *S, 3183 SourceLocation ExternLoc, 3184 SourceLocation TemplateLoc, 3185 Declarator &D); 3186 3187 TemplateArgumentLoc 3188 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 3189 SourceLocation TemplateLoc, 3190 SourceLocation RAngleLoc, 3191 Decl *Param, 3192 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3193 3194 /// \brief Specifies the context in which a particular template 3195 /// argument is being checked. 3196 enum CheckTemplateArgumentKind { 3197 /// \brief The template argument was specified in the code or was 3198 /// instantiated with some deduced template arguments. 3199 CTAK_Specified, 3200 3201 /// \brief The template argument was deduced via template argument 3202 /// deduction. 3203 CTAK_Deduced, 3204 3205 /// \brief The template argument was deduced from an array bound 3206 /// via template argument deduction. 3207 CTAK_DeducedFromArrayBound 3208 }; 3209 3210 bool CheckTemplateArgument(NamedDecl *Param, 3211 const TemplateArgumentLoc &Arg, 3212 NamedDecl *Template, 3213 SourceLocation TemplateLoc, 3214 SourceLocation RAngleLoc, 3215 unsigned ArgumentPackIndex, 3216 llvm::SmallVectorImpl<TemplateArgument> &Converted, 3217 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3218 3219 bool CheckTemplateArgumentList(TemplateDecl *Template, 3220 SourceLocation TemplateLoc, 3221 const TemplateArgumentListInfo &TemplateArgs, 3222 bool PartialTemplateArgs, 3223 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3224 3225 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 3226 const TemplateArgumentLoc &Arg, 3227 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3228 3229 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 3230 TypeSourceInfo *Arg); 3231 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 3232 TemplateArgument &Converted); 3233 bool CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 3234 QualType InstantiatedParamType, Expr *&Arg, 3235 TemplateArgument &Converted, 3236 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3237 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 3238 const TemplateArgumentLoc &Arg); 3239 3240 ExprResult 3241 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 3242 QualType ParamType, 3243 SourceLocation Loc); 3244 ExprResult 3245 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 3246 SourceLocation Loc); 3247 3248 /// \brief Enumeration describing how template parameter lists are compared 3249 /// for equality. 3250 enum TemplateParameterListEqualKind { 3251 /// \brief We are matching the template parameter lists of two templates 3252 /// that might be redeclarations. 3253 /// 3254 /// \code 3255 /// template<typename T> struct X; 3256 /// template<typename T> struct X; 3257 /// \endcode 3258 TPL_TemplateMatch, 3259 3260 /// \brief We are matching the template parameter lists of two template 3261 /// template parameters as part of matching the template parameter lists 3262 /// of two templates that might be redeclarations. 3263 /// 3264 /// \code 3265 /// template<template<int I> class TT> struct X; 3266 /// template<template<int Value> class Other> struct X; 3267 /// \endcode 3268 TPL_TemplateTemplateParmMatch, 3269 3270 /// \brief We are matching the template parameter lists of a template 3271 /// template argument against the template parameter lists of a template 3272 /// template parameter. 3273 /// 3274 /// \code 3275 /// template<template<int Value> class Metafun> struct X; 3276 /// template<int Value> struct integer_c; 3277 /// X<integer_c> xic; 3278 /// \endcode 3279 TPL_TemplateTemplateArgumentMatch 3280 }; 3281 3282 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 3283 TemplateParameterList *Old, 3284 bool Complain, 3285 TemplateParameterListEqualKind Kind, 3286 SourceLocation TemplateArgLoc 3287 = SourceLocation()); 3288 3289 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 3290 3291 /// \brief Called when the parser has parsed a C++ typename 3292 /// specifier, e.g., "typename T::type". 3293 /// 3294 /// \param S The scope in which this typename type occurs. 3295 /// \param TypenameLoc the location of the 'typename' keyword 3296 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3297 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 3298 /// \param IdLoc the location of the identifier. 3299 TypeResult 3300 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3301 const CXXScopeSpec &SS, const IdentifierInfo &II, 3302 SourceLocation IdLoc); 3303 3304 /// \brief Called when the parser has parsed a C++ typename 3305 /// specifier that ends in a template-id, e.g., 3306 /// "typename MetaFun::template apply<T1, T2>". 3307 /// 3308 /// \param S The scope in which this typename type occurs. 3309 /// \param TypenameLoc the location of the 'typename' keyword 3310 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3311 /// \param TemplateLoc the location of the 'template' keyword, if any. 3312 /// \param Ty the type that the typename specifier refers to. 3313 TypeResult 3314 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3315 const CXXScopeSpec &SS, SourceLocation TemplateLoc, 3316 ParsedType Ty); 3317 3318 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 3319 NestedNameSpecifier *NNS, 3320 const IdentifierInfo &II, 3321 SourceLocation KeywordLoc, 3322 SourceRange NNSRange, 3323 SourceLocation IILoc); 3324 3325 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 3326 SourceLocation Loc, 3327 DeclarationName Name); 3328 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 3329 3330 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 3331 3332 std::string 3333 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3334 const TemplateArgumentList &Args); 3335 3336 std::string 3337 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3338 const TemplateArgument *Args, 3339 unsigned NumArgs); 3340 3341 //===--------------------------------------------------------------------===// 3342 // C++ Variadic Templates (C++0x [temp.variadic]) 3343 //===--------------------------------------------------------------------===// 3344 3345 /// \brief The context in which an unexpanded parameter pack is 3346 /// being diagnosed. 3347 /// 3348 /// Note that the values of this enumeration line up with the first 3349 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 3350 enum UnexpandedParameterPackContext { 3351 /// \brief An arbitrary expression. 3352 UPPC_Expression = 0, 3353 3354 /// \brief The base type of a class type. 3355 UPPC_BaseType, 3356 3357 /// \brief The type of an arbitrary declaration. 3358 UPPC_DeclarationType, 3359 3360 /// \brief The type of a data member. 3361 UPPC_DataMemberType, 3362 3363 /// \brief The size of a bit-field. 3364 UPPC_BitFieldWidth, 3365 3366 /// \brief The expression in a static assertion. 3367 UPPC_StaticAssertExpression, 3368 3369 /// \brief The fixed underlying type of an enumeration. 3370 UPPC_FixedUnderlyingType, 3371 3372 /// \brief The enumerator value. 3373 UPPC_EnumeratorValue, 3374 3375 /// \brief A using declaration. 3376 UPPC_UsingDeclaration, 3377 3378 /// \brief A friend declaration. 3379 UPPC_FriendDeclaration, 3380 3381 /// \brief A declaration qualifier. 3382 UPPC_DeclarationQualifier, 3383 3384 /// \brief An initializer. 3385 UPPC_Initializer, 3386 3387 /// \brief A default argument. 3388 UPPC_DefaultArgument, 3389 3390 /// \brief The type of a non-type template parameter. 3391 UPPC_NonTypeTemplateParameterType, 3392 3393 /// \brief The type of an exception. 3394 UPPC_ExceptionType, 3395 3396 /// \brief Partial specialization. 3397 UPPC_PartialSpecialization 3398 }; 3399 3400 /// \brief If the given type contains an unexpanded parameter pack, 3401 /// diagnose the error. 3402 /// 3403 /// \param Loc The source location where a diagnostc should be emitted. 3404 /// 3405 /// \param T The type that is being checked for unexpanded parameter 3406 /// packs. 3407 /// 3408 /// \returns true if an error ocurred, false otherwise. 3409 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 3410 UnexpandedParameterPackContext UPPC); 3411 3412 /// \brief If the given expression contains an unexpanded parameter 3413 /// pack, diagnose the error. 3414 /// 3415 /// \param E The expression that is being checked for unexpanded 3416 /// parameter packs. 3417 /// 3418 /// \returns true if an error ocurred, false otherwise. 3419 bool DiagnoseUnexpandedParameterPack(Expr *E, 3420 UnexpandedParameterPackContext UPPC = UPPC_Expression); 3421 3422 /// \brief If the given nested-name-specifier contains an unexpanded 3423 /// parameter pack, diagnose the error. 3424 /// 3425 /// \param SS The nested-name-specifier that is being checked for 3426 /// unexpanded parameter packs. 3427 /// 3428 /// \returns true if an error ocurred, false otherwise. 3429 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 3430 UnexpandedParameterPackContext UPPC); 3431 3432 /// \brief If the given name contains an unexpanded parameter pack, 3433 /// diagnose the error. 3434 /// 3435 /// \param NameInfo The name (with source location information) that 3436 /// is being checked for unexpanded parameter packs. 3437 /// 3438 /// \returns true if an error ocurred, false otherwise. 3439 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 3440 UnexpandedParameterPackContext UPPC); 3441 3442 /// \brief If the given template name contains an unexpanded parameter pack, 3443 /// diagnose the error. 3444 /// 3445 /// \param Loc The location of the template name. 3446 /// 3447 /// \param Template The template name that is being checked for unexpanded 3448 /// parameter packs. 3449 /// 3450 /// \returns true if an error ocurred, false otherwise. 3451 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 3452 TemplateName Template, 3453 UnexpandedParameterPackContext UPPC); 3454 3455 /// \brief If the given template argument contains an unexpanded parameter 3456 /// pack, diagnose the error. 3457 /// 3458 /// \param Arg The template argument that is being checked for unexpanded 3459 /// parameter packs. 3460 /// 3461 /// \returns true if an error ocurred, false otherwise. 3462 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 3463 UnexpandedParameterPackContext UPPC); 3464 3465 /// \brief Collect the set of unexpanded parameter packs within the given 3466 /// template argument. 3467 /// 3468 /// \param Arg The template argument that will be traversed to find 3469 /// unexpanded parameter packs. 3470 void collectUnexpandedParameterPacks(TemplateArgument Arg, 3471 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3472 3473 /// \brief Collect the set of unexpanded parameter packs within the given 3474 /// template argument. 3475 /// 3476 /// \param Arg The template argument that will be traversed to find 3477 /// unexpanded parameter packs. 3478 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 3479 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3480 3481 /// \brief Collect the set of unexpanded parameter packs within the given 3482 /// type. 3483 /// 3484 /// \param T The type that will be traversed to find 3485 /// unexpanded parameter packs. 3486 void collectUnexpandedParameterPacks(QualType T, 3487 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3488 3489 /// \brief Collect the set of unexpanded parameter packs within the given 3490 /// type. 3491 /// 3492 /// \param TL The type that will be traversed to find 3493 /// unexpanded parameter packs. 3494 void collectUnexpandedParameterPacks(TypeLoc TL, 3495 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3496 3497 /// \brief Invoked when parsing a template argument followed by an 3498 /// ellipsis, which creates a pack expansion. 3499 /// 3500 /// \param Arg The template argument preceding the ellipsis, which 3501 /// may already be invalid. 3502 /// 3503 /// \param EllipsisLoc The location of the ellipsis. 3504 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 3505 SourceLocation EllipsisLoc); 3506 3507 /// \brief Invoked when parsing a type followed by an ellipsis, which 3508 /// creates a pack expansion. 3509 /// 3510 /// \param Type The type preceding the ellipsis, which will become 3511 /// the pattern of the pack expansion. 3512 /// 3513 /// \param EllipsisLoc The location of the ellipsis. 3514 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 3515 3516 /// \brief Construct a pack expansion type from the pattern of the pack 3517 /// expansion. 3518 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 3519 SourceLocation EllipsisLoc, 3520 llvm::Optional<unsigned> NumExpansions); 3521 3522 /// \brief Construct a pack expansion type from the pattern of the pack 3523 /// expansion. 3524 QualType CheckPackExpansion(QualType Pattern, 3525 SourceRange PatternRange, 3526 SourceLocation EllipsisLoc, 3527 llvm::Optional<unsigned> NumExpansions); 3528 3529 /// \brief Invoked when parsing an expression followed by an ellipsis, which 3530 /// creates a pack expansion. 3531 /// 3532 /// \param Pattern The expression preceding the ellipsis, which will become 3533 /// the pattern of the pack expansion. 3534 /// 3535 /// \param EllipsisLoc The location of the ellipsis. 3536 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 3537 3538 /// \brief Invoked when parsing an expression followed by an ellipsis, which 3539 /// creates a pack expansion. 3540 /// 3541 /// \param Pattern The expression preceding the ellipsis, which will become 3542 /// the pattern of the pack expansion. 3543 /// 3544 /// \param EllipsisLoc The location of the ellipsis. 3545 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 3546 llvm::Optional<unsigned> NumExpansions); 3547 3548 /// \brief Determine whether we could expand a pack expansion with the 3549 /// given set of parameter packs into separate arguments by repeatedly 3550 /// transforming the pattern. 3551 /// 3552 /// \param EllipsisLoc The location of the ellipsis that identifies the 3553 /// pack expansion. 3554 /// 3555 /// \param PatternRange The source range that covers the entire pattern of 3556 /// the pack expansion. 3557 /// 3558 /// \param Unexpanded The set of unexpanded parameter packs within the 3559 /// pattern. 3560 /// 3561 /// \param NumUnexpanded The number of unexpanded parameter packs in 3562 /// \p Unexpanded. 3563 /// 3564 /// \param ShouldExpand Will be set to \c true if the transformer should 3565 /// expand the corresponding pack expansions into separate arguments. When 3566 /// set, \c NumExpansions must also be set. 3567 /// 3568 /// \param RetainExpansion Whether the caller should add an unexpanded 3569 /// pack expansion after all of the expanded arguments. This is used 3570 /// when extending explicitly-specified template argument packs per 3571 /// C++0x [temp.arg.explicit]p9. 3572 /// 3573 /// \param NumExpansions The number of separate arguments that will be in 3574 /// the expanded form of the corresponding pack expansion. This is both an 3575 /// input and an output parameter, which can be set by the caller if the 3576 /// number of expansions is known a priori (e.g., due to a prior substitution) 3577 /// and will be set by the callee when the number of expansions is known. 3578 /// The callee must set this value when \c ShouldExpand is \c true; it may 3579 /// set this value in other cases. 3580 /// 3581 /// \returns true if an error occurred (e.g., because the parameter packs 3582 /// are to be instantiated with arguments of different lengths), false 3583 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 3584 /// must be set. 3585 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 3586 SourceRange PatternRange, 3587 const UnexpandedParameterPack *Unexpanded, 3588 unsigned NumUnexpanded, 3589 const MultiLevelTemplateArgumentList &TemplateArgs, 3590 bool &ShouldExpand, 3591 bool &RetainExpansion, 3592 llvm::Optional<unsigned> &NumExpansions); 3593 3594 /// \brief Determine the number of arguments in the given pack expansion 3595 /// type. 3596 /// 3597 /// This routine already assumes that the pack expansion type can be 3598 /// expanded and that the number of arguments in the expansion is 3599 /// consistent across all of the unexpanded parameter packs in its pattern. 3600 unsigned getNumArgumentsInExpansion(QualType T, 3601 const MultiLevelTemplateArgumentList &TemplateArgs); 3602 3603 /// \brief Determine whether the given declarator contains any unexpanded 3604 /// parameter packs. 3605 /// 3606 /// This routine is used by the parser to disambiguate function declarators 3607 /// with an ellipsis prior to the ')', e.g., 3608 /// 3609 /// \code 3610 /// void f(T...); 3611 /// \endcode 3612 /// 3613 /// To determine whether we have an (unnamed) function parameter pack or 3614 /// a variadic function. 3615 /// 3616 /// \returns true if the declarator contains any unexpanded parameter packs, 3617 /// false otherwise. 3618 bool containsUnexpandedParameterPacks(Declarator &D); 3619 3620 //===--------------------------------------------------------------------===// 3621 // C++ Template Argument Deduction (C++ [temp.deduct]) 3622 //===--------------------------------------------------------------------===// 3623 3624 /// \brief Describes the result of template argument deduction. 3625 /// 3626 /// The TemplateDeductionResult enumeration describes the result of 3627 /// template argument deduction, as returned from 3628 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 3629 /// structure provides additional information about the results of 3630 /// template argument deduction, e.g., the deduced template argument 3631 /// list (if successful) or the specific template parameters or 3632 /// deduced arguments that were involved in the failure. 3633 enum TemplateDeductionResult { 3634 /// \brief Template argument deduction was successful. 3635 TDK_Success = 0, 3636 /// \brief Template argument deduction exceeded the maximum template 3637 /// instantiation depth (which has already been diagnosed). 3638 TDK_InstantiationDepth, 3639 /// \brief Template argument deduction did not deduce a value 3640 /// for every template parameter. 3641 TDK_Incomplete, 3642 /// \brief Template argument deduction produced inconsistent 3643 /// deduced values for the given template parameter. 3644 TDK_Inconsistent, 3645 /// \brief Template argument deduction failed due to inconsistent 3646 /// cv-qualifiers on a template parameter type that would 3647 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 3648 /// but were given a non-const "X". 3649 TDK_Underqualified, 3650 /// \brief Substitution of the deduced template argument values 3651 /// resulted in an error. 3652 TDK_SubstitutionFailure, 3653 /// \brief Substitution of the deduced template argument values 3654 /// into a non-deduced context produced a type or value that 3655 /// produces a type that does not match the original template 3656 /// arguments provided. 3657 TDK_NonDeducedMismatch, 3658 /// \brief When performing template argument deduction for a function 3659 /// template, there were too many call arguments. 3660 TDK_TooManyArguments, 3661 /// \brief When performing template argument deduction for a function 3662 /// template, there were too few call arguments. 3663 TDK_TooFewArguments, 3664 /// \brief The explicitly-specified template arguments were not valid 3665 /// template arguments for the given template. 3666 TDK_InvalidExplicitArguments, 3667 /// \brief The arguments included an overloaded function name that could 3668 /// not be resolved to a suitable function. 3669 TDK_FailedOverloadResolution 3670 }; 3671 3672 TemplateDeductionResult 3673 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 3674 const TemplateArgumentList &TemplateArgs, 3675 sema::TemplateDeductionInfo &Info); 3676 3677 TemplateDeductionResult 3678 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3679 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3680 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 3681 llvm::SmallVectorImpl<QualType> &ParamTypes, 3682 QualType *FunctionType, 3683 sema::TemplateDeductionInfo &Info); 3684 3685 TemplateDeductionResult 3686 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 3687 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 3688 unsigned NumExplicitlySpecified, 3689 FunctionDecl *&Specialization, 3690 sema::TemplateDeductionInfo &Info); 3691 3692 TemplateDeductionResult 3693 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3694 const TemplateArgumentListInfo *ExplicitTemplateArgs, 3695 Expr **Args, unsigned NumArgs, 3696 FunctionDecl *&Specialization, 3697 sema::TemplateDeductionInfo &Info); 3698 3699 TemplateDeductionResult 3700 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3701 const TemplateArgumentListInfo *ExplicitTemplateArgs, 3702 QualType ArgFunctionType, 3703 FunctionDecl *&Specialization, 3704 sema::TemplateDeductionInfo &Info); 3705 3706 TemplateDeductionResult 3707 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3708 QualType ToType, 3709 CXXConversionDecl *&Specialization, 3710 sema::TemplateDeductionInfo &Info); 3711 3712 TemplateDeductionResult 3713 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3714 const TemplateArgumentListInfo *ExplicitTemplateArgs, 3715 FunctionDecl *&Specialization, 3716 sema::TemplateDeductionInfo &Info); 3717 3718 bool DeduceAutoType(QualType AutoType, Expr *Initializer, QualType &Result); 3719 3720 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 3721 FunctionTemplateDecl *FT2, 3722 SourceLocation Loc, 3723 TemplatePartialOrderingContext TPOC, 3724 unsigned NumCallArguments); 3725 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 3726 UnresolvedSetIterator SEnd, 3727 TemplatePartialOrderingContext TPOC, 3728 unsigned NumCallArguments, 3729 SourceLocation Loc, 3730 const PartialDiagnostic &NoneDiag, 3731 const PartialDiagnostic &AmbigDiag, 3732 const PartialDiagnostic &CandidateDiag, 3733 bool Complain = true); 3734 3735 ClassTemplatePartialSpecializationDecl * 3736 getMoreSpecializedPartialSpecialization( 3737 ClassTemplatePartialSpecializationDecl *PS1, 3738 ClassTemplatePartialSpecializationDecl *PS2, 3739 SourceLocation Loc); 3740 3741 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 3742 bool OnlyDeduced, 3743 unsigned Depth, 3744 llvm::SmallVectorImpl<bool> &Used); 3745 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 3746 llvm::SmallVectorImpl<bool> &Deduced); 3747 3748 //===--------------------------------------------------------------------===// 3749 // C++ Template Instantiation 3750 // 3751 3752 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 3753 const TemplateArgumentList *Innermost = 0, 3754 bool RelativeToPrimary = false, 3755 const FunctionDecl *Pattern = 0); 3756 3757 /// \brief A template instantiation that is currently in progress. 3758 struct ActiveTemplateInstantiation { 3759 /// \brief The kind of template instantiation we are performing 3760 enum InstantiationKind { 3761 /// We are instantiating a template declaration. The entity is 3762 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 3763 TemplateInstantiation, 3764 3765 /// We are instantiating a default argument for a template 3766 /// parameter. The Entity is the template, and 3767 /// TemplateArgs/NumTemplateArguments provides the template 3768 /// arguments as specified. 3769 /// FIXME: Use a TemplateArgumentList 3770 DefaultTemplateArgumentInstantiation, 3771 3772 /// We are instantiating a default argument for a function. 3773 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 3774 /// provides the template arguments as specified. 3775 DefaultFunctionArgumentInstantiation, 3776 3777 /// We are substituting explicit template arguments provided for 3778 /// a function template. The entity is a FunctionTemplateDecl. 3779 ExplicitTemplateArgumentSubstitution, 3780 3781 /// We are substituting template argument determined as part of 3782 /// template argument deduction for either a class template 3783 /// partial specialization or a function template. The 3784 /// Entity is either a ClassTemplatePartialSpecializationDecl or 3785 /// a FunctionTemplateDecl. 3786 DeducedTemplateArgumentSubstitution, 3787 3788 /// We are substituting prior template arguments into a new 3789 /// template parameter. The template parameter itself is either a 3790 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 3791 PriorTemplateArgumentSubstitution, 3792 3793 /// We are checking the validity of a default template argument that 3794 /// has been used when naming a template-id. 3795 DefaultTemplateArgumentChecking 3796 } Kind; 3797 3798 /// \brief The point of instantiation within the source code. 3799 SourceLocation PointOfInstantiation; 3800 3801 /// \brief The template (or partial specialization) in which we are 3802 /// performing the instantiation, for substitutions of prior template 3803 /// arguments. 3804 NamedDecl *Template; 3805 3806 /// \brief The entity that is being instantiated. 3807 uintptr_t Entity; 3808 3809 /// \brief The list of template arguments we are substituting, if they 3810 /// are not part of the entity. 3811 const TemplateArgument *TemplateArgs; 3812 3813 /// \brief The number of template arguments in TemplateArgs. 3814 unsigned NumTemplateArgs; 3815 3816 /// \brief The template deduction info object associated with the 3817 /// substitution or checking of explicit or deduced template arguments. 3818 sema::TemplateDeductionInfo *DeductionInfo; 3819 3820 /// \brief The source range that covers the construct that cause 3821 /// the instantiation, e.g., the template-id that causes a class 3822 /// template instantiation. 3823 SourceRange InstantiationRange; 3824 3825 ActiveTemplateInstantiation() 3826 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 3827 NumTemplateArgs(0), DeductionInfo(0) {} 3828 3829 /// \brief Determines whether this template is an actual instantiation 3830 /// that should be counted toward the maximum instantiation depth. 3831 bool isInstantiationRecord() const; 3832 3833 friend bool operator==(const ActiveTemplateInstantiation &X, 3834 const ActiveTemplateInstantiation &Y) { 3835 if (X.Kind != Y.Kind) 3836 return false; 3837 3838 if (X.Entity != Y.Entity) 3839 return false; 3840 3841 switch (X.Kind) { 3842 case TemplateInstantiation: 3843 return true; 3844 3845 case PriorTemplateArgumentSubstitution: 3846 case DefaultTemplateArgumentChecking: 3847 if (X.Template != Y.Template) 3848 return false; 3849 3850 // Fall through 3851 3852 case DefaultTemplateArgumentInstantiation: 3853 case ExplicitTemplateArgumentSubstitution: 3854 case DeducedTemplateArgumentSubstitution: 3855 case DefaultFunctionArgumentInstantiation: 3856 return X.TemplateArgs == Y.TemplateArgs; 3857 3858 } 3859 3860 return true; 3861 } 3862 3863 friend bool operator!=(const ActiveTemplateInstantiation &X, 3864 const ActiveTemplateInstantiation &Y) { 3865 return !(X == Y); 3866 } 3867 }; 3868 3869 /// \brief List of active template instantiations. 3870 /// 3871 /// This vector is treated as a stack. As one template instantiation 3872 /// requires another template instantiation, additional 3873 /// instantiations are pushed onto the stack up to a 3874 /// user-configurable limit LangOptions::InstantiationDepth. 3875 llvm::SmallVector<ActiveTemplateInstantiation, 16> 3876 ActiveTemplateInstantiations; 3877 3878 /// \brief Whether we are in a SFINAE context that is not associated with 3879 /// template instantiation. 3880 /// 3881 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 3882 /// of a template instantiation or template argument deduction. 3883 bool InNonInstantiationSFINAEContext; 3884 3885 /// \brief The number of ActiveTemplateInstantiation entries in 3886 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 3887 /// therefore, should not be counted as part of the instantiation depth. 3888 unsigned NonInstantiationEntries; 3889 3890 /// \brief The last template from which a template instantiation 3891 /// error or warning was produced. 3892 /// 3893 /// This value is used to suppress printing of redundant template 3894 /// instantiation backtraces when there are multiple errors in the 3895 /// same instantiation. FIXME: Does this belong in Sema? It's tough 3896 /// to implement it anywhere else. 3897 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 3898 3899 /// \brief The current index into pack expansion arguments that will be 3900 /// used for substitution of parameter packs. 3901 /// 3902 /// The pack expansion index will be -1 to indicate that parameter packs 3903 /// should be instantiated as themselves. Otherwise, the index specifies 3904 /// which argument within the parameter pack will be used for substitution. 3905 int ArgumentPackSubstitutionIndex; 3906 3907 /// \brief RAII object used to change the argument pack substitution index 3908 /// within a \c Sema object. 3909 /// 3910 /// See \c ArgumentPackSubstitutionIndex for more information. 3911 class ArgumentPackSubstitutionIndexRAII { 3912 Sema &Self; 3913 int OldSubstitutionIndex; 3914 3915 public: 3916 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 3917 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 3918 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 3919 } 3920 3921 ~ArgumentPackSubstitutionIndexRAII() { 3922 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 3923 } 3924 }; 3925 3926 friend class ArgumentPackSubstitutionRAII; 3927 3928 /// \brief The stack of calls expression undergoing template instantiation. 3929 /// 3930 /// The top of this stack is used by a fixit instantiating unresolved 3931 /// function calls to fix the AST to match the textual change it prints. 3932 llvm::SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 3933 3934 /// \brief For each declaration that involved template argument deduction, the 3935 /// set of diagnostics that were suppressed during that template argument 3936 /// deduction. 3937 /// 3938 /// FIXME: Serialize this structure to the AST file. 3939 llvm::DenseMap<Decl *, llvm::SmallVector<PartialDiagnosticAt, 1> > 3940 SuppressedDiagnostics; 3941 3942 /// \brief A stack object to be created when performing template 3943 /// instantiation. 3944 /// 3945 /// Construction of an object of type \c InstantiatingTemplate 3946 /// pushes the current instantiation onto the stack of active 3947 /// instantiations. If the size of this stack exceeds the maximum 3948 /// number of recursive template instantiations, construction 3949 /// produces an error and evaluates true. 3950 /// 3951 /// Destruction of this object will pop the named instantiation off 3952 /// the stack. 3953 struct InstantiatingTemplate { 3954 /// \brief Note that we are instantiating a class template, 3955 /// function template, or a member thereof. 3956 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 3957 Decl *Entity, 3958 SourceRange InstantiationRange = SourceRange()); 3959 3960 /// \brief Note that we are instantiating a default argument in a 3961 /// template-id. 3962 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 3963 TemplateDecl *Template, 3964 const TemplateArgument *TemplateArgs, 3965 unsigned NumTemplateArgs, 3966 SourceRange InstantiationRange = SourceRange()); 3967 3968 /// \brief Note that we are instantiating a default argument in a 3969 /// template-id. 3970 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 3971 FunctionTemplateDecl *FunctionTemplate, 3972 const TemplateArgument *TemplateArgs, 3973 unsigned NumTemplateArgs, 3974 ActiveTemplateInstantiation::InstantiationKind Kind, 3975 sema::TemplateDeductionInfo &DeductionInfo, 3976 SourceRange InstantiationRange = SourceRange()); 3977 3978 /// \brief Note that we are instantiating as part of template 3979 /// argument deduction for a class template partial 3980 /// specialization. 3981 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 3982 ClassTemplatePartialSpecializationDecl *PartialSpec, 3983 const TemplateArgument *TemplateArgs, 3984 unsigned NumTemplateArgs, 3985 sema::TemplateDeductionInfo &DeductionInfo, 3986 SourceRange InstantiationRange = SourceRange()); 3987 3988 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 3989 ParmVarDecl *Param, 3990 const TemplateArgument *TemplateArgs, 3991 unsigned NumTemplateArgs, 3992 SourceRange InstantiationRange = SourceRange()); 3993 3994 /// \brief Note that we are substituting prior template arguments into a 3995 /// non-type or template template parameter. 3996 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 3997 NamedDecl *Template, 3998 NonTypeTemplateParmDecl *Param, 3999 const TemplateArgument *TemplateArgs, 4000 unsigned NumTemplateArgs, 4001 SourceRange InstantiationRange); 4002 4003 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4004 NamedDecl *Template, 4005 TemplateTemplateParmDecl *Param, 4006 const TemplateArgument *TemplateArgs, 4007 unsigned NumTemplateArgs, 4008 SourceRange InstantiationRange); 4009 4010 /// \brief Note that we are checking the default template argument 4011 /// against the template parameter for a given template-id. 4012 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4013 TemplateDecl *Template, 4014 NamedDecl *Param, 4015 const TemplateArgument *TemplateArgs, 4016 unsigned NumTemplateArgs, 4017 SourceRange InstantiationRange); 4018 4019 4020 /// \brief Note that we have finished instantiating this template. 4021 void Clear(); 4022 4023 ~InstantiatingTemplate() { Clear(); } 4024 4025 /// \brief Determines whether we have exceeded the maximum 4026 /// recursive template instantiations. 4027 operator bool() const { return Invalid; } 4028 4029 private: 4030 Sema &SemaRef; 4031 bool Invalid; 4032 bool SavedInNonInstantiationSFINAEContext; 4033 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4034 SourceRange InstantiationRange); 4035 4036 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4037 4038 InstantiatingTemplate& 4039 operator=(const InstantiatingTemplate&); // not implemented 4040 }; 4041 4042 void PrintInstantiationStack(); 4043 4044 /// \brief Determines whether we are currently in a context where 4045 /// template argument substitution failures are not considered 4046 /// errors. 4047 /// 4048 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4049 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4050 /// template-deduction context object, which can be used to capture 4051 /// diagnostics that will be suppressed. 4052 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4053 4054 /// \brief RAII class used to determine whether SFINAE has 4055 /// trapped any errors that occur during template argument 4056 /// deduction.` 4057 class SFINAETrap { 4058 Sema &SemaRef; 4059 unsigned PrevSFINAEErrors; 4060 bool PrevInNonInstantiationSFINAEContext; 4061 bool PrevAccessCheckingSFINAE; 4062 4063 public: 4064 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 4065 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 4066 PrevInNonInstantiationSFINAEContext( 4067 SemaRef.InNonInstantiationSFINAEContext), 4068 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 4069 { 4070 if (!SemaRef.isSFINAEContext()) 4071 SemaRef.InNonInstantiationSFINAEContext = true; 4072 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 4073 } 4074 4075 ~SFINAETrap() { 4076 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 4077 SemaRef.InNonInstantiationSFINAEContext 4078 = PrevInNonInstantiationSFINAEContext; 4079 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 4080 } 4081 4082 /// \brief Determine whether any SFINAE errors have been trapped. 4083 bool hasErrorOccurred() const { 4084 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 4085 } 4086 }; 4087 4088 /// \brief The current instantiation scope used to store local 4089 /// variables. 4090 LocalInstantiationScope *CurrentInstantiationScope; 4091 4092 /// \brief The number of typos corrected by CorrectTypo. 4093 unsigned TyposCorrected; 4094 4095 typedef llvm::DenseMap<IdentifierInfo *, std::pair<llvm::StringRef, bool> > 4096 UnqualifiedTyposCorrectedMap; 4097 4098 /// \brief A cache containing the results of typo correction for unqualified 4099 /// name lookup. 4100 /// 4101 /// The string is the string that we corrected to (which may be empty, if 4102 /// there was no correction), while the boolean will be true when the 4103 /// string represents a keyword. 4104 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 4105 4106 /// \brief Worker object for performing CFG-based warnings. 4107 sema::AnalysisBasedWarnings AnalysisWarnings; 4108 4109 /// \brief An entity for which implicit template instantiation is required. 4110 /// 4111 /// The source location associated with the declaration is the first place in 4112 /// the source code where the declaration was "used". It is not necessarily 4113 /// the point of instantiation (which will be either before or after the 4114 /// namespace-scope declaration that triggered this implicit instantiation), 4115 /// However, it is the location that diagnostics should generally refer to, 4116 /// because users will need to know what code triggered the instantiation. 4117 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 4118 4119 /// \brief The queue of implicit template instantiations that are required 4120 /// but have not yet been performed. 4121 std::deque<PendingImplicitInstantiation> PendingInstantiations; 4122 4123 /// \brief The queue of implicit template instantiations that are required 4124 /// and must be performed within the current local scope. 4125 /// 4126 /// This queue is only used for member functions of local classes in 4127 /// templates, which must be instantiated in the same scope as their 4128 /// enclosing function, so that they can reference function-local 4129 /// types, static variables, enumerators, etc. 4130 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 4131 4132 void PerformPendingInstantiations(bool LocalOnly = false); 4133 4134 TypeSourceInfo *SubstType(TypeSourceInfo *T, 4135 const MultiLevelTemplateArgumentList &TemplateArgs, 4136 SourceLocation Loc, DeclarationName Entity); 4137 4138 QualType SubstType(QualType T, 4139 const MultiLevelTemplateArgumentList &TemplateArgs, 4140 SourceLocation Loc, DeclarationName Entity); 4141 4142 TypeSourceInfo *SubstType(TypeLoc TL, 4143 const MultiLevelTemplateArgumentList &TemplateArgs, 4144 SourceLocation Loc, DeclarationName Entity); 4145 4146 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 4147 const MultiLevelTemplateArgumentList &TemplateArgs, 4148 SourceLocation Loc, 4149 DeclarationName Entity); 4150 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 4151 const MultiLevelTemplateArgumentList &TemplateArgs, 4152 llvm::Optional<unsigned> NumExpansions); 4153 bool SubstParmTypes(SourceLocation Loc, 4154 ParmVarDecl **Params, unsigned NumParams, 4155 const MultiLevelTemplateArgumentList &TemplateArgs, 4156 llvm::SmallVectorImpl<QualType> &ParamTypes, 4157 llvm::SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 4158 ExprResult SubstExpr(Expr *E, 4159 const MultiLevelTemplateArgumentList &TemplateArgs); 4160 4161 /// \brief Substitute the given template arguments into a list of 4162 /// expressions, expanding pack expansions if required. 4163 /// 4164 /// \param Exprs The list of expressions to substitute into. 4165 /// 4166 /// \param NumExprs The number of expressions in \p Exprs. 4167 /// 4168 /// \param IsCall Whether this is some form of call, in which case 4169 /// default arguments will be dropped. 4170 /// 4171 /// \param TemplateArgs The set of template arguments to substitute. 4172 /// 4173 /// \param Outputs Will receive all of the substituted arguments. 4174 /// 4175 /// \returns true if an error occurred, false otherwise. 4176 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 4177 const MultiLevelTemplateArgumentList &TemplateArgs, 4178 llvm::SmallVectorImpl<Expr *> &Outputs); 4179 4180 StmtResult SubstStmt(Stmt *S, 4181 const MultiLevelTemplateArgumentList &TemplateArgs); 4182 4183 Decl *SubstDecl(Decl *D, DeclContext *Owner, 4184 const MultiLevelTemplateArgumentList &TemplateArgs); 4185 4186 bool 4187 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 4188 CXXRecordDecl *Pattern, 4189 const MultiLevelTemplateArgumentList &TemplateArgs); 4190 4191 bool 4192 InstantiateClass(SourceLocation PointOfInstantiation, 4193 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 4194 const MultiLevelTemplateArgumentList &TemplateArgs, 4195 TemplateSpecializationKind TSK, 4196 bool Complain = true); 4197 4198 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 4199 Decl *Pattern, Decl *Inst); 4200 4201 bool 4202 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 4203 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4204 TemplateSpecializationKind TSK, 4205 bool Complain = true); 4206 4207 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 4208 CXXRecordDecl *Instantiation, 4209 const MultiLevelTemplateArgumentList &TemplateArgs, 4210 TemplateSpecializationKind TSK); 4211 4212 void InstantiateClassTemplateSpecializationMembers( 4213 SourceLocation PointOfInstantiation, 4214 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4215 TemplateSpecializationKind TSK); 4216 4217 NestedNameSpecifier * 4218 SubstNestedNameSpecifier(NestedNameSpecifier *NNS, 4219 SourceRange Range, 4220 const MultiLevelTemplateArgumentList &TemplateArgs); 4221 DeclarationNameInfo 4222 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 4223 const MultiLevelTemplateArgumentList &TemplateArgs); 4224 TemplateName 4225 SubstTemplateName(TemplateName Name, SourceLocation Loc, 4226 const MultiLevelTemplateArgumentList &TemplateArgs); 4227 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 4228 TemplateArgumentListInfo &Result, 4229 const MultiLevelTemplateArgumentList &TemplateArgs); 4230 4231 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 4232 FunctionDecl *Function, 4233 bool Recursive = false, 4234 bool DefinitionRequired = false); 4235 void InstantiateStaticDataMemberDefinition( 4236 SourceLocation PointOfInstantiation, 4237 VarDecl *Var, 4238 bool Recursive = false, 4239 bool DefinitionRequired = false); 4240 4241 void InstantiateMemInitializers(CXXConstructorDecl *New, 4242 const CXXConstructorDecl *Tmpl, 4243 const MultiLevelTemplateArgumentList &TemplateArgs); 4244 4245 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 4246 const MultiLevelTemplateArgumentList &TemplateArgs); 4247 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 4248 const MultiLevelTemplateArgumentList &TemplateArgs); 4249 4250 // Objective-C declarations. 4251 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 4252 IdentifierInfo *ClassName, 4253 SourceLocation ClassLoc, 4254 IdentifierInfo *SuperName, 4255 SourceLocation SuperLoc, 4256 Decl * const *ProtoRefs, 4257 unsigned NumProtoRefs, 4258 const SourceLocation *ProtoLocs, 4259 SourceLocation EndProtoLoc, 4260 AttributeList *AttrList); 4261 4262 Decl *ActOnCompatiblityAlias( 4263 SourceLocation AtCompatibilityAliasLoc, 4264 IdentifierInfo *AliasName, SourceLocation AliasLocation, 4265 IdentifierInfo *ClassName, SourceLocation ClassLocation); 4266 4267 void CheckForwardProtocolDeclarationForCircularDependency( 4268 IdentifierInfo *PName, 4269 SourceLocation &PLoc, SourceLocation PrevLoc, 4270 const ObjCList<ObjCProtocolDecl> &PList); 4271 4272 Decl *ActOnStartProtocolInterface( 4273 SourceLocation AtProtoInterfaceLoc, 4274 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 4275 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 4276 const SourceLocation *ProtoLocs, 4277 SourceLocation EndProtoLoc, 4278 AttributeList *AttrList); 4279 4280 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 4281 IdentifierInfo *ClassName, 4282 SourceLocation ClassLoc, 4283 IdentifierInfo *CategoryName, 4284 SourceLocation CategoryLoc, 4285 Decl * const *ProtoRefs, 4286 unsigned NumProtoRefs, 4287 const SourceLocation *ProtoLocs, 4288 SourceLocation EndProtoLoc); 4289 4290 Decl *ActOnStartClassImplementation( 4291 SourceLocation AtClassImplLoc, 4292 IdentifierInfo *ClassName, SourceLocation ClassLoc, 4293 IdentifierInfo *SuperClassname, 4294 SourceLocation SuperClassLoc); 4295 4296 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 4297 IdentifierInfo *ClassName, 4298 SourceLocation ClassLoc, 4299 IdentifierInfo *CatName, 4300 SourceLocation CatLoc); 4301 4302 Decl *ActOnForwardClassDeclaration(SourceLocation Loc, 4303 IdentifierInfo **IdentList, 4304 SourceLocation *IdentLocs, 4305 unsigned NumElts); 4306 4307 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 4308 const IdentifierLocPair *IdentList, 4309 unsigned NumElts, 4310 AttributeList *attrList); 4311 4312 void FindProtocolDeclaration(bool WarnOnDeclarations, 4313 const IdentifierLocPair *ProtocolId, 4314 unsigned NumProtocols, 4315 llvm::SmallVectorImpl<Decl *> &Protocols); 4316 4317 /// Ensure attributes are consistent with type. 4318 /// \param [in, out] Attributes The attributes to check; they will 4319 /// be modified to be consistent with \arg PropertyTy. 4320 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 4321 SourceLocation Loc, 4322 unsigned &Attributes); 4323 4324 /// Process the specified property declaration and create decls for the 4325 /// setters and getters as needed. 4326 /// \param property The property declaration being processed 4327 /// \param DC The semantic container for the property 4328 /// \param redeclaredProperty Declaration for property if redeclared 4329 /// in class extension. 4330 /// \param lexicalDC Container for redeclaredProperty. 4331 void ProcessPropertyDecl(ObjCPropertyDecl *property, 4332 ObjCContainerDecl *DC, 4333 ObjCPropertyDecl *redeclaredProperty = 0, 4334 ObjCContainerDecl *lexicalDC = 0); 4335 4336 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 4337 ObjCPropertyDecl *SuperProperty, 4338 const IdentifierInfo *Name); 4339 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 4340 4341 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 4342 ObjCMethodDecl *MethodDecl, 4343 bool IsInstance); 4344 4345 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 4346 4347 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 4348 ObjCInterfaceDecl *ID); 4349 4350 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 4351 ObjCProtocolDecl *PDecl); 4352 4353 void ActOnAtEnd(Scope *S, SourceRange AtEnd, Decl *classDecl, 4354 Decl **allMethods = 0, unsigned allNum = 0, 4355 Decl **allProperties = 0, unsigned pNum = 0, 4356 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 4357 4358 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 4359 FieldDeclarator &FD, ObjCDeclSpec &ODS, 4360 Selector GetterSel, Selector SetterSel, 4361 Decl *ClassCategory, 4362 bool *OverridingProperty, 4363 tok::ObjCKeywordKind MethodImplKind, 4364 DeclContext *lexicalDC = 0); 4365 4366 Decl *ActOnPropertyImplDecl(Scope *S, 4367 SourceLocation AtLoc, 4368 SourceLocation PropertyLoc, 4369 bool ImplKind,Decl *ClassImplDecl, 4370 IdentifierInfo *PropertyId, 4371 IdentifierInfo *PropertyIvar, 4372 SourceLocation PropertyIvarLoc); 4373 4374 struct ObjCArgInfo { 4375 IdentifierInfo *Name; 4376 SourceLocation NameLoc; 4377 // The Type is null if no type was specified, and the DeclSpec is invalid 4378 // in this case. 4379 ParsedType Type; 4380 ObjCDeclSpec DeclSpec; 4381 4382 /// ArgAttrs - Attribute list for this argument. 4383 AttributeList *ArgAttrs; 4384 }; 4385 4386 Decl *ActOnMethodDeclaration( 4387 Scope *S, 4388 SourceLocation BeginLoc, // location of the + or -. 4389 SourceLocation EndLoc, // location of the ; or {. 4390 tok::TokenKind MethodType, 4391 Decl *ClassDecl, ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 4392 Selector Sel, 4393 // optional arguments. The number of types/arguments is obtained 4394 // from the Sel.getNumArgs(). 4395 ObjCArgInfo *ArgInfo, 4396 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 4397 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 4398 bool isVariadic = false); 4399 4400 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 4401 // Will search "local" class/category implementations for a method decl. 4402 // Will also search in class's root looking for instance method. 4403 // Returns 0 if no method is found. 4404 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 4405 ObjCInterfaceDecl *CDecl); 4406 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 4407 ObjCInterfaceDecl *ClassDecl); 4408 4409 ExprResult 4410 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 4411 Expr *BaseExpr, 4412 DeclarationName MemberName, 4413 SourceLocation MemberLoc, 4414 SourceLocation SuperLoc, QualType SuperType, 4415 bool Super); 4416 4417 ExprResult 4418 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 4419 IdentifierInfo &propertyName, 4420 SourceLocation receiverNameLoc, 4421 SourceLocation propertyNameLoc); 4422 4423 ObjCMethodDecl *tryCaptureObjCSelf(); 4424 4425 /// \brief Describes the kind of message expression indicated by a message 4426 /// send that starts with an identifier. 4427 enum ObjCMessageKind { 4428 /// \brief The message is sent to 'super'. 4429 ObjCSuperMessage, 4430 /// \brief The message is an instance message. 4431 ObjCInstanceMessage, 4432 /// \brief The message is a class message, and the identifier is a type 4433 /// name. 4434 ObjCClassMessage 4435 }; 4436 4437 ObjCMessageKind getObjCMessageKind(Scope *S, 4438 IdentifierInfo *Name, 4439 SourceLocation NameLoc, 4440 bool IsSuper, 4441 bool HasTrailingDot, 4442 ParsedType &ReceiverType); 4443 4444 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 4445 Selector Sel, 4446 SourceLocation LBracLoc, 4447 SourceLocation SelectorLoc, 4448 SourceLocation RBracLoc, 4449 MultiExprArg Args); 4450 4451 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 4452 QualType ReceiverType, 4453 SourceLocation SuperLoc, 4454 Selector Sel, 4455 ObjCMethodDecl *Method, 4456 SourceLocation LBracLoc, 4457 SourceLocation SelectorLoc, 4458 SourceLocation RBracLoc, 4459 MultiExprArg Args); 4460 4461 ExprResult ActOnClassMessage(Scope *S, 4462 ParsedType Receiver, 4463 Selector Sel, 4464 SourceLocation LBracLoc, 4465 SourceLocation SelectorLoc, 4466 SourceLocation RBracLoc, 4467 MultiExprArg Args); 4468 4469 ExprResult BuildInstanceMessage(Expr *Receiver, 4470 QualType ReceiverType, 4471 SourceLocation SuperLoc, 4472 Selector Sel, 4473 ObjCMethodDecl *Method, 4474 SourceLocation LBracLoc, 4475 SourceLocation SelectorLoc, 4476 SourceLocation RBracLoc, 4477 MultiExprArg Args); 4478 4479 ExprResult ActOnInstanceMessage(Scope *S, 4480 Expr *Receiver, 4481 Selector Sel, 4482 SourceLocation LBracLoc, 4483 SourceLocation SelectorLoc, 4484 SourceLocation RBracLoc, 4485 MultiExprArg Args); 4486 4487 4488 enum PragmaOptionsAlignKind { 4489 POAK_Native, // #pragma options align=native 4490 POAK_Natural, // #pragma options align=natural 4491 POAK_Packed, // #pragma options align=packed 4492 POAK_Power, // #pragma options align=power 4493 POAK_Mac68k, // #pragma options align=mac68k 4494 POAK_Reset // #pragma options align=reset 4495 }; 4496 4497 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 4498 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 4499 SourceLocation PragmaLoc, 4500 SourceLocation KindLoc); 4501 4502 enum PragmaPackKind { 4503 PPK_Default, // #pragma pack([n]) 4504 PPK_Show, // #pragma pack(show), only supported by MSVC. 4505 PPK_Push, // #pragma pack(push, [identifier], [n]) 4506 PPK_Pop // #pragma pack(pop, [identifier], [n]) 4507 }; 4508 4509 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 4510 void ActOnPragmaPack(PragmaPackKind Kind, 4511 IdentifierInfo *Name, 4512 Expr *Alignment, 4513 SourceLocation PragmaLoc, 4514 SourceLocation LParenLoc, 4515 SourceLocation RParenLoc); 4516 4517 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 4518 void ActOnPragmaUnused(const Token &Identifier, 4519 Scope *curScope, 4520 SourceLocation PragmaLoc); 4521 4522 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 4523 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 4524 SourceLocation PragmaLoc); 4525 4526 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II); 4527 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 4528 4529 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 4530 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 4531 SourceLocation PragmaLoc, 4532 SourceLocation WeakNameLoc); 4533 4534 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 4535 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 4536 IdentifierInfo* AliasName, 4537 SourceLocation PragmaLoc, 4538 SourceLocation WeakNameLoc, 4539 SourceLocation AliasNameLoc); 4540 4541 /// ActOnPragmaFPContract - Called on well formed 4542 /// #pragma {STDC,OPENCL} FP_CONTRACT 4543 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 4544 4545 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 4546 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 4547 void AddAlignmentAttributesForRecord(RecordDecl *RD); 4548 4549 /// FreePackedContext - Deallocate and null out PackContext. 4550 void FreePackedContext(); 4551 4552 /// PushNamespaceVisibilityAttr - Note that we've entered a 4553 /// namespace with a visibility attribute. 4554 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 4555 4556 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 4557 /// add an appropriate visibility attribute. 4558 void AddPushedVisibilityAttribute(Decl *RD); 4559 4560 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 4561 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 4562 void PopPragmaVisibility(); 4563 4564 /// FreeVisContext - Deallocate and null out VisContext. 4565 void FreeVisContext(); 4566 4567 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 4568 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, Expr *E); 4569 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, TypeSourceInfo *T); 4570 4571 /// CastCategory - Get the correct forwarded implicit cast result category 4572 /// from the inner expression. 4573 ExprValueKind CastCategory(Expr *E); 4574 4575 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 4576 /// cast. If there is already an implicit cast, merge into the existing one. 4577 /// If isLvalue, the result of the cast is an lvalue. 4578 void ImpCastExprToType(Expr *&Expr, QualType Type, CastKind CK, 4579 ExprValueKind VK = VK_RValue, 4580 const CXXCastPath *BasePath = 0); 4581 4582 /// IgnoredValueConversions - Given that an expression's result is 4583 /// syntactically ignored, perform any conversions that are 4584 /// required. 4585 void IgnoredValueConversions(Expr *&expr); 4586 4587 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 4588 // functions and arrays to their respective pointers (C99 6.3.2.1). 4589 Expr *UsualUnaryConversions(Expr *&expr); 4590 4591 // DefaultFunctionArrayConversion - converts functions and arrays 4592 // to their respective pointers (C99 6.3.2.1). 4593 void DefaultFunctionArrayConversion(Expr *&expr); 4594 4595 // DefaultFunctionArrayLvalueConversion - converts functions and 4596 // arrays to their respective pointers and performs the 4597 // lvalue-to-rvalue conversion. 4598 void DefaultFunctionArrayLvalueConversion(Expr *&expr); 4599 4600 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 4601 // the operand. This is DefaultFunctionArrayLvalueConversion, 4602 // except that it assumes the operand isn't of function or array 4603 // type. 4604 void DefaultLvalueConversion(Expr *&expr); 4605 4606 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 4607 // do not have a prototype. Integer promotions are performed on each 4608 // argument, and arguments that have type float are promoted to double. 4609 void DefaultArgumentPromotion(Expr *&Expr); 4610 4611 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 4612 enum VariadicCallType { 4613 VariadicFunction, 4614 VariadicBlock, 4615 VariadicMethod, 4616 VariadicConstructor, 4617 VariadicDoesNotApply 4618 }; 4619 4620 /// GatherArgumentsForCall - Collector argument expressions for various 4621 /// form of call prototypes. 4622 bool GatherArgumentsForCall(SourceLocation CallLoc, 4623 FunctionDecl *FDecl, 4624 const FunctionProtoType *Proto, 4625 unsigned FirstProtoArg, 4626 Expr **Args, unsigned NumArgs, 4627 llvm::SmallVector<Expr *, 8> &AllArgs, 4628 VariadicCallType CallType = VariadicDoesNotApply); 4629 4630 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 4631 // will warn if the resulting type is not a POD type. 4632 bool DefaultVariadicArgumentPromotion(Expr *&Expr, VariadicCallType CT, 4633 FunctionDecl *FDecl); 4634 4635 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 4636 // operands and then handles various conversions that are common to binary 4637 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 4638 // routine returns the first non-arithmetic type found. The client is 4639 // responsible for emitting appropriate error diagnostics. 4640 QualType UsualArithmeticConversions(Expr *&lExpr, Expr *&rExpr, 4641 bool isCompAssign = false); 4642 4643 /// AssignConvertType - All of the 'assignment' semantic checks return this 4644 /// enum to indicate whether the assignment was allowed. These checks are 4645 /// done for simple assignments, as well as initialization, return from 4646 /// function, argument passing, etc. The query is phrased in terms of a 4647 /// source and destination type. 4648 enum AssignConvertType { 4649 /// Compatible - the types are compatible according to the standard. 4650 Compatible, 4651 4652 /// PointerToInt - The assignment converts a pointer to an int, which we 4653 /// accept as an extension. 4654 PointerToInt, 4655 4656 /// IntToPointer - The assignment converts an int to a pointer, which we 4657 /// accept as an extension. 4658 IntToPointer, 4659 4660 /// FunctionVoidPointer - The assignment is between a function pointer and 4661 /// void*, which the standard doesn't allow, but we accept as an extension. 4662 FunctionVoidPointer, 4663 4664 /// IncompatiblePointer - The assignment is between two pointers types that 4665 /// are not compatible, but we accept them as an extension. 4666 IncompatiblePointer, 4667 4668 /// IncompatiblePointer - The assignment is between two pointers types which 4669 /// point to integers which have a different sign, but are otherwise identical. 4670 /// This is a subset of the above, but broken out because it's by far the most 4671 /// common case of incompatible pointers. 4672 IncompatiblePointerSign, 4673 4674 /// CompatiblePointerDiscardsQualifiers - The assignment discards 4675 /// c/v/r qualifiers, which we accept as an extension. 4676 CompatiblePointerDiscardsQualifiers, 4677 4678 /// IncompatiblePointerDiscardsQualifiers - The assignment 4679 /// discards qualifiers that we don't permit to be discarded, 4680 /// like address spaces. 4681 IncompatiblePointerDiscardsQualifiers, 4682 4683 /// IncompatibleNestedPointerQualifiers - The assignment is between two 4684 /// nested pointer types, and the qualifiers other than the first two 4685 /// levels differ e.g. char ** -> const char **, but we accept them as an 4686 /// extension. 4687 IncompatibleNestedPointerQualifiers, 4688 4689 /// IncompatibleVectors - The assignment is between two vector types that 4690 /// have the same size, which we accept as an extension. 4691 IncompatibleVectors, 4692 4693 /// IntToBlockPointer - The assignment converts an int to a block 4694 /// pointer. We disallow this. 4695 IntToBlockPointer, 4696 4697 /// IncompatibleBlockPointer - The assignment is between two block 4698 /// pointers types that are not compatible. 4699 IncompatibleBlockPointer, 4700 4701 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 4702 /// id type and something else (that is incompatible with it). For example, 4703 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 4704 IncompatibleObjCQualifiedId, 4705 4706 /// Incompatible - We reject this conversion outright, it is invalid to 4707 /// represent it in the AST. 4708 Incompatible 4709 }; 4710 4711 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 4712 /// assignment conversion type specified by ConvTy. This returns true if the 4713 /// conversion was invalid or false if the conversion was accepted. 4714 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 4715 SourceLocation Loc, 4716 QualType DstType, QualType SrcType, 4717 Expr *SrcExpr, AssignmentAction Action, 4718 bool *Complained = 0); 4719 4720 /// CheckAssignmentConstraints - Perform type checking for assignment, 4721 /// argument passing, variable initialization, and function return values. 4722 /// C99 6.5.16. 4723 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 4724 QualType lhs, QualType rhs); 4725 4726 /// Check assignment constraints and prepare for a conversion of the 4727 /// RHS to the LHS type. 4728 AssignConvertType CheckAssignmentConstraints(QualType lhs, Expr *&rhs, 4729 CastKind &Kind); 4730 4731 // CheckSingleAssignmentConstraints - Currently used by 4732 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 4733 // this routine performs the default function/array converions. 4734 AssignConvertType CheckSingleAssignmentConstraints(QualType lhs, 4735 Expr *&rExpr); 4736 4737 // \brief If the lhs type is a transparent union, check whether we 4738 // can initialize the transparent union with the given expression. 4739 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType lhs, 4740 Expr *&rExpr); 4741 4742 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 4743 4744 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 4745 4746 bool PerformImplicitConversion(Expr *&From, QualType ToType, 4747 AssignmentAction Action, 4748 bool AllowExplicit = false); 4749 bool PerformImplicitConversion(Expr *&From, QualType ToType, 4750 AssignmentAction Action, 4751 bool AllowExplicit, 4752 ImplicitConversionSequence& ICS); 4753 bool PerformImplicitConversion(Expr *&From, QualType ToType, 4754 const ImplicitConversionSequence& ICS, 4755 AssignmentAction Action, 4756 bool CStyle = false); 4757 bool PerformImplicitConversion(Expr *&From, QualType ToType, 4758 const StandardConversionSequence& SCS, 4759 AssignmentAction Action, 4760 bool CStyle); 4761 4762 /// the following "Check" methods will return a valid/converted QualType 4763 /// or a null QualType (indicating an error diagnostic was issued). 4764 4765 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 4766 QualType InvalidOperands(SourceLocation l, Expr *&lex, Expr *&rex); 4767 QualType CheckPointerToMemberOperands( // C++ 5.5 4768 Expr *&lex, Expr *&rex, ExprValueKind &VK, 4769 SourceLocation OpLoc, bool isIndirect); 4770 QualType CheckMultiplyDivideOperands( // C99 6.5.5 4771 Expr *&lex, Expr *&rex, SourceLocation OpLoc, bool isCompAssign, 4772 bool isDivide); 4773 QualType CheckRemainderOperands( // C99 6.5.5 4774 Expr *&lex, Expr *&rex, SourceLocation OpLoc, bool isCompAssign = false); 4775 QualType CheckAdditionOperands( // C99 6.5.6 4776 Expr *&lex, Expr *&rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 4777 QualType CheckSubtractionOperands( // C99 6.5.6 4778 Expr *&lex, Expr *&rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 4779 QualType CheckShiftOperands( // C99 6.5.7 4780 Expr *&lex, Expr *&rex, SourceLocation OpLoc, bool isCompAssign = false); 4781 QualType CheckCompareOperands( // C99 6.5.8/9 4782 Expr *&lex, Expr *&rex, SourceLocation OpLoc, unsigned Opc, 4783 bool isRelational); 4784 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 4785 Expr *&lex, Expr *&rex, SourceLocation OpLoc, bool isCompAssign = false); 4786 QualType CheckLogicalOperands( // C99 6.5.[13,14] 4787 Expr *&lex, Expr *&rex, SourceLocation OpLoc, unsigned Opc); 4788 // CheckAssignmentOperands is used for both simple and compound assignment. 4789 // For simple assignment, pass both expressions and a null converted type. 4790 // For compound assignment, pass both expressions and the converted type. 4791 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 4792 Expr *lex, Expr *&rex, SourceLocation OpLoc, QualType convertedType); 4793 4794 void ConvertPropertyForRValue(Expr *&E); 4795 void ConvertPropertyForLValue(Expr *&LHS, Expr *&RHS, QualType& LHSTy); 4796 4797 QualType CheckConditionalOperands( // C99 6.5.15 4798 Expr *&cond, Expr *&lhs, Expr *&rhs, 4799 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 4800 QualType CXXCheckConditionalOperands( // C++ 5.16 4801 Expr *&cond, Expr *&lhs, Expr *&rhs, 4802 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 4803 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 4804 bool *NonStandardCompositeType = 0); 4805 4806 QualType FindCompositeObjCPointerType(Expr *&LHS, Expr *&RHS, 4807 SourceLocation questionLoc); 4808 4809 bool DiagnoseConditionalForNull(Expr *LHS, Expr *RHS, 4810 SourceLocation QuestionLoc); 4811 4812 /// type checking for vector binary operators. 4813 QualType CheckVectorOperands(SourceLocation l, Expr *&lex, Expr *&rex); 4814 QualType CheckVectorCompareOperands(Expr *&lex, Expr *&rx, 4815 SourceLocation l, bool isRel); 4816 4817 /// type checking declaration initializers (C99 6.7.8) 4818 bool CheckInitList(const InitializedEntity &Entity, 4819 InitListExpr *&InitList, QualType &DeclType); 4820 bool CheckForConstantInitializer(Expr *e, QualType t); 4821 4822 // type checking C++ declaration initializers (C++ [dcl.init]). 4823 4824 /// ReferenceCompareResult - Expresses the result of comparing two 4825 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 4826 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 4827 enum ReferenceCompareResult { 4828 /// Ref_Incompatible - The two types are incompatible, so direct 4829 /// reference binding is not possible. 4830 Ref_Incompatible = 0, 4831 /// Ref_Related - The two types are reference-related, which means 4832 /// that their unqualified forms (T1 and T2) are either the same 4833 /// or T1 is a base class of T2. 4834 Ref_Related, 4835 /// Ref_Compatible_With_Added_Qualification - The two types are 4836 /// reference-compatible with added qualification, meaning that 4837 /// they are reference-compatible and the qualifiers on T1 (cv1) 4838 /// are greater than the qualifiers on T2 (cv2). 4839 Ref_Compatible_With_Added_Qualification, 4840 /// Ref_Compatible - The two types are reference-compatible and 4841 /// have equivalent qualifiers (cv1 == cv2). 4842 Ref_Compatible 4843 }; 4844 4845 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 4846 QualType T1, QualType T2, 4847 bool &DerivedToBase, 4848 bool &ObjCConversion); 4849 4850 /// CheckCastTypes - Check type constraints for casting between types under 4851 /// C semantics, or forward to CXXCheckCStyleCast in C++. 4852 bool CheckCastTypes(SourceRange TyRange, QualType CastTy, Expr *&CastExpr, 4853 CastKind &Kind, ExprValueKind &VK, CXXCastPath &BasePath, 4854 bool FunctionalStyle = false); 4855 4856 // CheckVectorCast - check type constraints for vectors. 4857 // Since vectors are an extension, there are no C standard reference for this. 4858 // We allow casting between vectors and integer datatypes of the same size. 4859 // returns true if the cast is invalid 4860 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 4861 CastKind &Kind); 4862 4863 // CheckExtVectorCast - check type constraints for extended vectors. 4864 // Since vectors are an extension, there are no C standard reference for this. 4865 // We allow casting between vectors and integer datatypes of the same size, 4866 // or vectors and the element type of that vector. 4867 // returns true if the cast is invalid 4868 bool CheckExtVectorCast(SourceRange R, QualType VectorTy, Expr *&CastExpr, 4869 CastKind &Kind); 4870 4871 /// CXXCheckCStyleCast - Check constraints of a C-style or function-style 4872 /// cast under C++ semantics. 4873 bool CXXCheckCStyleCast(SourceRange R, QualType CastTy, ExprValueKind &VK, 4874 Expr *&CastExpr, CastKind &Kind, 4875 CXXCastPath &BasePath, bool FunctionalStyle); 4876 4877 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 4878 /// \param Method - May be null. 4879 /// \param [out] ReturnType - The return type of the send. 4880 /// \return true iff there were any incompatible types. 4881 bool CheckMessageArgumentTypes(Expr **Args, unsigned NumArgs, Selector Sel, 4882 ObjCMethodDecl *Method, bool isClassMessage, 4883 SourceLocation lbrac, SourceLocation rbrac, 4884 QualType &ReturnType, ExprValueKind &VK); 4885 4886 /// CheckBooleanCondition - Diagnose problems involving the use of 4887 /// the given expression as a boolean condition (e.g. in an if 4888 /// statement). Also performs the standard function and array 4889 /// decays, possibly changing the input variable. 4890 /// 4891 /// \param Loc - A location associated with the condition, e.g. the 4892 /// 'if' keyword. 4893 /// \return true iff there were any errors 4894 bool CheckBooleanCondition(Expr *&CondExpr, SourceLocation Loc); 4895 4896 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 4897 Expr *SubExpr); 4898 4899 /// DiagnoseAssignmentAsCondition - Given that an expression is 4900 /// being used as a boolean condition, warn if it's an assignment. 4901 void DiagnoseAssignmentAsCondition(Expr *E); 4902 4903 /// \brief Redundant parentheses over an equality comparison can indicate 4904 /// that the user intended an assignment used as condition. 4905 void DiagnoseEqualityWithExtraParens(ParenExpr *parenE); 4906 4907 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 4908 bool CheckCXXBooleanCondition(Expr *&CondExpr); 4909 4910 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 4911 /// the specified width and sign. If an overflow occurs, detect it and emit 4912 /// the specified diagnostic. 4913 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 4914 unsigned NewWidth, bool NewSign, 4915 SourceLocation Loc, unsigned DiagID); 4916 4917 /// Checks that the Objective-C declaration is declared in the global scope. 4918 /// Emits an error and marks the declaration as invalid if it's not declared 4919 /// in the global scope. 4920 bool CheckObjCDeclScope(Decl *D); 4921 4922 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 4923 /// and reports the appropriate diagnostics. Returns false on success. 4924 /// Can optionally return the value of the expression. 4925 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 4926 4927 /// VerifyBitField - verifies that a bit field expression is an ICE and has 4928 /// the correct width, and that the field type is valid. 4929 /// Returns false on success. 4930 /// Can optionally return whether the bit-field is of width 0 4931 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 4932 QualType FieldTy, const Expr *BitWidth, 4933 bool *ZeroWidth = 0); 4934 4935 /// \name Code completion 4936 //@{ 4937 /// \brief Describes the context in which code completion occurs. 4938 enum ParserCompletionContext { 4939 /// \brief Code completion occurs at top-level or namespace context. 4940 PCC_Namespace, 4941 /// \brief Code completion occurs within a class, struct, or union. 4942 PCC_Class, 4943 /// \brief Code completion occurs within an Objective-C interface, protocol, 4944 /// or category. 4945 PCC_ObjCInterface, 4946 /// \brief Code completion occurs within an Objective-C implementation or 4947 /// category implementation 4948 PCC_ObjCImplementation, 4949 /// \brief Code completion occurs within the list of instance variables 4950 /// in an Objective-C interface, protocol, category, or implementation. 4951 PCC_ObjCInstanceVariableList, 4952 /// \brief Code completion occurs following one or more template 4953 /// headers. 4954 PCC_Template, 4955 /// \brief Code completion occurs following one or more template 4956 /// headers within a class. 4957 PCC_MemberTemplate, 4958 /// \brief Code completion occurs within an expression. 4959 PCC_Expression, 4960 /// \brief Code completion occurs within a statement, which may 4961 /// also be an expression or a declaration. 4962 PCC_Statement, 4963 /// \brief Code completion occurs at the beginning of the 4964 /// initialization statement (or expression) in a for loop. 4965 PCC_ForInit, 4966 /// \brief Code completion occurs within the condition of an if, 4967 /// while, switch, or for statement. 4968 PCC_Condition, 4969 /// \brief Code completion occurs within the body of a function on a 4970 /// recovery path, where we do not have a specific handle on our position 4971 /// in the grammar. 4972 PCC_RecoveryInFunction, 4973 /// \brief Code completion occurs where only a type is permitted. 4974 PCC_Type, 4975 /// \brief Code completion occurs in a parenthesized expression, which 4976 /// might also be a type cast. 4977 PCC_ParenthesizedExpression, 4978 /// \brief Code completion occurs within a sequence of declaration 4979 /// specifiers within a function, method, or block. 4980 PCC_LocalDeclarationSpecifiers 4981 }; 4982 4983 void CodeCompleteOrdinaryName(Scope *S, 4984 ParserCompletionContext CompletionContext); 4985 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 4986 bool AllowNonIdentifiers, 4987 bool AllowNestedNameSpecifiers); 4988 4989 struct CodeCompleteExpressionData; 4990 void CodeCompleteExpression(Scope *S, 4991 const CodeCompleteExpressionData &Data); 4992 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 4993 SourceLocation OpLoc, 4994 bool IsArrow); 4995 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 4996 void CodeCompleteTag(Scope *S, unsigned TagSpec); 4997 void CodeCompleteTypeQualifiers(DeclSpec &DS); 4998 void CodeCompleteCase(Scope *S); 4999 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 5000 void CodeCompleteInitializer(Scope *S, Decl *D); 5001 void CodeCompleteReturn(Scope *S); 5002 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 5003 5004 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 5005 bool EnteringContext); 5006 void CodeCompleteUsing(Scope *S); 5007 void CodeCompleteUsingDirective(Scope *S); 5008 void CodeCompleteNamespaceDecl(Scope *S); 5009 void CodeCompleteNamespaceAliasDecl(Scope *S); 5010 void CodeCompleteOperatorName(Scope *S); 5011 void CodeCompleteConstructorInitializer(Decl *Constructor, 5012 CXXCtorInitializer** Initializers, 5013 unsigned NumInitializers); 5014 5015 void CodeCompleteObjCAtDirective(Scope *S, Decl *ObjCImpDecl, 5016 bool InInterface); 5017 void CodeCompleteObjCAtVisibility(Scope *S); 5018 void CodeCompleteObjCAtStatement(Scope *S); 5019 void CodeCompleteObjCAtExpression(Scope *S); 5020 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 5021 void CodeCompleteObjCPropertyGetter(Scope *S, Decl *ClassDecl); 5022 void CodeCompleteObjCPropertySetter(Scope *S, Decl *ClassDecl); 5023 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 5024 bool IsParameter); 5025 void CodeCompleteObjCMessageReceiver(Scope *S); 5026 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 5027 IdentifierInfo **SelIdents, 5028 unsigned NumSelIdents, 5029 bool AtArgumentExpression); 5030 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 5031 IdentifierInfo **SelIdents, 5032 unsigned NumSelIdents, 5033 bool AtArgumentExpression, 5034 bool IsSuper = false); 5035 void CodeCompleteObjCInstanceMessage(Scope *S, ExprTy *Receiver, 5036 IdentifierInfo **SelIdents, 5037 unsigned NumSelIdents, 5038 bool AtArgumentExpression, 5039 ObjCInterfaceDecl *Super = 0); 5040 void CodeCompleteObjCForCollection(Scope *S, 5041 DeclGroupPtrTy IterationVar); 5042 void CodeCompleteObjCSelector(Scope *S, 5043 IdentifierInfo **SelIdents, 5044 unsigned NumSelIdents); 5045 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 5046 unsigned NumProtocols); 5047 void CodeCompleteObjCProtocolDecl(Scope *S); 5048 void CodeCompleteObjCInterfaceDecl(Scope *S); 5049 void CodeCompleteObjCSuperclass(Scope *S, 5050 IdentifierInfo *ClassName, 5051 SourceLocation ClassNameLoc); 5052 void CodeCompleteObjCImplementationDecl(Scope *S); 5053 void CodeCompleteObjCInterfaceCategory(Scope *S, 5054 IdentifierInfo *ClassName, 5055 SourceLocation ClassNameLoc); 5056 void CodeCompleteObjCImplementationCategory(Scope *S, 5057 IdentifierInfo *ClassName, 5058 SourceLocation ClassNameLoc); 5059 void CodeCompleteObjCPropertyDefinition(Scope *S, Decl *ObjCImpDecl); 5060 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 5061 IdentifierInfo *PropertyName, 5062 Decl *ObjCImpDecl); 5063 void CodeCompleteObjCMethodDecl(Scope *S, 5064 bool IsInstanceMethod, 5065 ParsedType ReturnType, 5066 Decl *IDecl); 5067 void CodeCompleteObjCMethodDeclSelector(Scope *S, 5068 bool IsInstanceMethod, 5069 bool AtParameterName, 5070 ParsedType ReturnType, 5071 IdentifierInfo **SelIdents, 5072 unsigned NumSelIdents); 5073 void CodeCompletePreprocessorDirective(bool InConditional); 5074 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 5075 void CodeCompletePreprocessorMacroName(bool IsDefinition); 5076 void CodeCompletePreprocessorExpression(); 5077 void CodeCompletePreprocessorMacroArgument(Scope *S, 5078 IdentifierInfo *Macro, 5079 MacroInfo *MacroInfo, 5080 unsigned Argument); 5081 void CodeCompleteNaturalLanguage(); 5082 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 5083 llvm::SmallVectorImpl<CodeCompletionResult> &Results); 5084 //@} 5085 5086 void PrintStats() const {} 5087 5088 //===--------------------------------------------------------------------===// 5089 // Extra semantic analysis beyond the C type system 5090 5091public: 5092 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 5093 unsigned ByteNo) const; 5094 5095private: 5096 void CheckArrayAccess(const ArraySubscriptExpr *E); 5097 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 5098 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 5099 5100 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 5101 bool CheckObjCString(Expr *Arg); 5102 5103 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5104 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5105 5106 bool SemaBuiltinVAStart(CallExpr *TheCall); 5107 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 5108 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 5109 5110public: 5111 // Used by C++ template instantiation. 5112 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 5113 5114private: 5115 bool SemaBuiltinPrefetch(CallExpr *TheCall); 5116 bool SemaBuiltinObjectSize(CallExpr *TheCall); 5117 bool SemaBuiltinLongjmp(CallExpr *TheCall); 5118 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 5119 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 5120 llvm::APSInt &Result); 5121 5122 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 5123 bool HasVAListArg, unsigned format_idx, 5124 unsigned firstDataArg, bool isPrintf); 5125 5126 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 5127 const CallExpr *TheCall, bool HasVAListArg, 5128 unsigned format_idx, unsigned firstDataArg, 5129 bool isPrintf); 5130 5131 void CheckNonNullArguments(const NonNullAttr *NonNull, 5132 const CallExpr *TheCall); 5133 5134 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 5135 unsigned format_idx, unsigned firstDataArg, 5136 bool isPrintf); 5137 5138 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 5139 SourceLocation ReturnLoc); 5140 void CheckFloatComparison(SourceLocation loc, Expr* lex, Expr* rex); 5141 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 5142 5143 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 5144 Expr *Init); 5145 5146 /// \brief The parser's current scope. 5147 /// 5148 /// The parser maintains this state here. 5149 Scope *CurScope; 5150 5151protected: 5152 friend class Parser; 5153 friend class InitializationSequence; 5154 5155 /// \brief Retrieve the parser's current scope. 5156 Scope *getCurScope() const { return CurScope; } 5157}; 5158 5159/// \brief RAII object that enters a new expression evaluation context. 5160class EnterExpressionEvaluationContext { 5161 Sema &Actions; 5162 5163public: 5164 EnterExpressionEvaluationContext(Sema &Actions, 5165 Sema::ExpressionEvaluationContext NewContext) 5166 : Actions(Actions) { 5167 Actions.PushExpressionEvaluationContext(NewContext); 5168 } 5169 5170 ~EnterExpressionEvaluationContext() { 5171 Actions.PopExpressionEvaluationContext(); 5172 } 5173}; 5174 5175} // end namespace clang 5176 5177#endif 5178