Sema.h revision ccd891ae75e9678f1138868e50508c8083d021fa
1//===--- Sema.h - Semantic Analysis & AST Building --------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Sema class, which performs semantic analysis and 11// builds ASTs. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef LLVM_CLANG_SEMA_SEMA_H 16#define LLVM_CLANG_SEMA_SEMA_H 17 18#include "clang/Sema/Ownership.h" 19#include "clang/Sema/AnalysisBasedWarnings.h" 20#include "clang/Sema/IdentifierResolver.h" 21#include "clang/Sema/ObjCMethodList.h" 22#include "clang/Sema/DeclSpec.h" 23#include "clang/Sema/ExternalSemaSource.h" 24#include "clang/Sema/LocInfoType.h" 25#include "clang/Sema/TypoCorrection.h" 26#include "clang/Sema/Weak.h" 27#include "clang/AST/Expr.h" 28#include "clang/AST/DeclarationName.h" 29#include "clang/AST/ExternalASTSource.h" 30#include "clang/AST/TypeLoc.h" 31#include "clang/Basic/Specifiers.h" 32#include "clang/Basic/TemplateKinds.h" 33#include "clang/Basic/TypeTraits.h" 34#include "clang/Basic/ExpressionTraits.h" 35#include "llvm/ADT/OwningPtr.h" 36#include "llvm/ADT/SmallPtrSet.h" 37#include "llvm/ADT/SmallVector.h" 38#include <deque> 39#include <string> 40 41namespace llvm { 42 class APSInt; 43 template <typename ValueT> struct DenseMapInfo; 44 template <typename ValueT, typename ValueInfoT> class DenseSet; 45} 46 47namespace clang { 48 class ADLResult; 49 class ASTConsumer; 50 class ASTContext; 51 class ASTMutationListener; 52 class ASTReader; 53 class ASTWriter; 54 class ArrayType; 55 class AttributeList; 56 class BlockDecl; 57 class CXXBasePath; 58 class CXXBasePaths; 59 typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 60 class CXXConstructorDecl; 61 class CXXConversionDecl; 62 class CXXDestructorDecl; 63 class CXXFieldCollector; 64 class CXXMemberCallExpr; 65 class CXXMethodDecl; 66 class CXXScopeSpec; 67 class CXXTemporary; 68 class CXXTryStmt; 69 class CallExpr; 70 class ClassTemplateDecl; 71 class ClassTemplatePartialSpecializationDecl; 72 class ClassTemplateSpecializationDecl; 73 class CodeCompleteConsumer; 74 class CodeCompletionAllocator; 75 class CodeCompletionResult; 76 class Decl; 77 class DeclAccessPair; 78 class DeclContext; 79 class DeclRefExpr; 80 class DeclaratorDecl; 81 class DeducedTemplateArgument; 82 class DependentDiagnostic; 83 class DesignatedInitExpr; 84 class Designation; 85 class EnumConstantDecl; 86 class Expr; 87 class ExtVectorType; 88 class ExternalSemaSource; 89 class FormatAttr; 90 class FriendDecl; 91 class FunctionDecl; 92 class FunctionProtoType; 93 class FunctionTemplateDecl; 94 class ImplicitConversionSequence; 95 class InitListExpr; 96 class InitializationKind; 97 class InitializationSequence; 98 class InitializedEntity; 99 class IntegerLiteral; 100 class LabelStmt; 101 class LangOptions; 102 class LocalInstantiationScope; 103 class LookupResult; 104 class MacroInfo; 105 class MultiLevelTemplateArgumentList; 106 class NamedDecl; 107 class NonNullAttr; 108 class ObjCCategoryDecl; 109 class ObjCCategoryImplDecl; 110 class ObjCCompatibleAliasDecl; 111 class ObjCContainerDecl; 112 class ObjCImplDecl; 113 class ObjCImplementationDecl; 114 class ObjCInterfaceDecl; 115 class ObjCIvarDecl; 116 template <class T> class ObjCList; 117 class ObjCMessageExpr; 118 class ObjCMethodDecl; 119 class ObjCPropertyDecl; 120 class ObjCProtocolDecl; 121 class OverloadCandidateSet; 122 class OverloadExpr; 123 class ParenListExpr; 124 class ParmVarDecl; 125 class Preprocessor; 126 class PseudoDestructorTypeStorage; 127 class QualType; 128 class StandardConversionSequence; 129 class Stmt; 130 class StringLiteral; 131 class SwitchStmt; 132 class TargetAttributesSema; 133 class TemplateArgument; 134 class TemplateArgumentList; 135 class TemplateArgumentLoc; 136 class TemplateDecl; 137 class TemplateParameterList; 138 class TemplatePartialOrderingContext; 139 class TemplateTemplateParmDecl; 140 class Token; 141 class TypeAliasDecl; 142 class TypedefDecl; 143 class TypedefNameDecl; 144 class TypeLoc; 145 class UnqualifiedId; 146 class UnresolvedLookupExpr; 147 class UnresolvedMemberExpr; 148 class UnresolvedSetImpl; 149 class UnresolvedSetIterator; 150 class UsingDecl; 151 class UsingShadowDecl; 152 class ValueDecl; 153 class VarDecl; 154 class VisibilityAttr; 155 class VisibleDeclConsumer; 156 class IndirectFieldDecl; 157 158namespace sema { 159 class AccessedEntity; 160 class BlockScopeInfo; 161 class DelayedDiagnostic; 162 class FunctionScopeInfo; 163 class TemplateDeductionInfo; 164} 165 166// FIXME: No way to easily map from TemplateTypeParmTypes to 167// TemplateTypeParmDecls, so we have this horrible PointerUnion. 168typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 169 SourceLocation> UnexpandedParameterPack; 170 171/// Sema - This implements semantic analysis and AST building for C. 172class Sema { 173 Sema(const Sema&); // DO NOT IMPLEMENT 174 void operator=(const Sema&); // DO NOT IMPLEMENT 175 mutable const TargetAttributesSema* TheTargetAttributesSema; 176public: 177 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 178 typedef OpaquePtr<TemplateName> TemplateTy; 179 typedef OpaquePtr<QualType> TypeTy; 180 typedef Attr AttrTy; 181 typedef CXXBaseSpecifier BaseTy; 182 typedef CXXCtorInitializer MemInitTy; 183 typedef Expr ExprTy; 184 typedef Stmt StmtTy; 185 typedef TemplateParameterList TemplateParamsTy; 186 typedef NestedNameSpecifier CXXScopeTy; 187 188 OpenCLOptions OpenCLFeatures; 189 FPOptions FPFeatures; 190 191 const LangOptions &LangOpts; 192 Preprocessor &PP; 193 ASTContext &Context; 194 ASTConsumer &Consumer; 195 Diagnostic &Diags; 196 SourceManager &SourceMgr; 197 198 /// \brief Flag indicating whether or not to collect detailed statistics. 199 bool CollectStats; 200 201 /// \brief Source of additional semantic information. 202 ExternalSemaSource *ExternalSource; 203 204 /// \brief Code-completion consumer. 205 CodeCompleteConsumer *CodeCompleter; 206 207 /// CurContext - This is the current declaration context of parsing. 208 DeclContext *CurContext; 209 210 /// VAListTagName - The declaration name corresponding to __va_list_tag. 211 /// This is used as part of a hack to omit that class from ADL results. 212 DeclarationName VAListTagName; 213 214 /// PackContext - Manages the stack for #pragma pack. An alignment 215 /// of 0 indicates default alignment. 216 void *PackContext; // Really a "PragmaPackStack*" 217 218 bool MSStructPragmaOn; // True when #pragma ms_struct on 219 220 /// VisContext - Manages the stack for #pragma GCC visibility. 221 void *VisContext; // Really a "PragmaVisStack*" 222 223 /// ExprNeedsCleanups - True if the current evaluation context 224 /// requires cleanups to be run at its conclusion. 225 bool ExprNeedsCleanups; 226 227 /// \brief Stack containing information about each of the nested 228 /// function, block, and method scopes that are currently active. 229 /// 230 /// This array is never empty. Clients should ignore the first 231 /// element, which is used to cache a single FunctionScopeInfo 232 /// that's used to parse every top-level function. 233 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 234 235 /// ExprTemporaries - This is the stack of temporaries that are created by 236 /// the current full expression. 237 SmallVector<CXXTemporary*, 8> ExprTemporaries; 238 239 typedef LazyVector<TypedefNameDecl *, ExternalSemaSource, 240 &ExternalSemaSource::ReadExtVectorDecls, 2, 2> 241 ExtVectorDeclsType; 242 243 /// ExtVectorDecls - This is a list all the extended vector types. This allows 244 /// us to associate a raw vector type with one of the ext_vector type names. 245 /// This is only necessary for issuing pretty diagnostics. 246 ExtVectorDeclsType ExtVectorDecls; 247 248 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 249 llvm::OwningPtr<CXXFieldCollector> FieldCollector; 250 251 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 252 253 /// PureVirtualClassDiagSet - a set of class declarations which we have 254 /// emitted a list of pure virtual functions. Used to prevent emitting the 255 /// same list more than once. 256 llvm::OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 257 258 /// ParsingInitForAutoVars - a set of declarations with auto types for which 259 /// we are currently parsing the initializer. 260 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 261 262 /// \brief A mapping from external names to the most recent 263 /// locally-scoped external declaration with that name. 264 /// 265 /// This map contains external declarations introduced in local 266 /// scoped, e.g., 267 /// 268 /// \code 269 /// void f() { 270 /// void foo(int, int); 271 /// } 272 /// \endcode 273 /// 274 /// Here, the name "foo" will be associated with the declaration on 275 /// "foo" within f. This name is not visible outside of 276 /// "f". However, we still find it in two cases: 277 /// 278 /// - If we are declaring another external with the name "foo", we 279 /// can find "foo" as a previous declaration, so that the types 280 /// of this external declaration can be checked for 281 /// compatibility. 282 /// 283 /// - If we would implicitly declare "foo" (e.g., due to a call to 284 /// "foo" in C when no prototype or definition is visible), then 285 /// we find this declaration of "foo" and complain that it is 286 /// not visible. 287 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 288 289 /// \brief Look for a locally scoped external declaration by the given name. 290 llvm::DenseMap<DeclarationName, NamedDecl *>::iterator 291 findLocallyScopedExternalDecl(DeclarationName Name); 292 293 typedef LazyVector<VarDecl *, ExternalSemaSource, 294 &ExternalSemaSource::ReadTentativeDefinitions, 2, 2> 295 TentativeDefinitionsType; 296 297 /// \brief All the tentative definitions encountered in the TU. 298 TentativeDefinitionsType TentativeDefinitions; 299 300 typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource, 301 &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2> 302 UnusedFileScopedDeclsType; 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 UnusedFileScopedDeclsType UnusedFileScopedDecls; 307 308 typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource, 309 &ExternalSemaSource::ReadDelegatingConstructors, 2, 2> 310 DelegatingCtorDeclsType; 311 312 /// \brief All the delegating constructors seen so far in the file, used for 313 /// cycle detection at the end of the TU. 314 DelegatingCtorDeclsType DelegatingCtorDecls; 315 316 /// \brief All the overriding destructors seen during a class definition 317 /// (there could be multiple due to nested classes) that had their exception 318 /// spec checks delayed, plus the overridden destructor. 319 SmallVector<std::pair<const CXXDestructorDecl*, 320 const CXXDestructorDecl*>, 2> 321 DelayedDestructorExceptionSpecChecks; 322 323 /// \brief Callback to the parser to parse templated functions when needed. 324 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 325 LateTemplateParserCB *LateTemplateParser; 326 void *OpaqueParser; 327 328 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 329 LateTemplateParser = LTP; 330 OpaqueParser = P; 331 } 332 333 class DelayedDiagnostics; 334 335 class ParsingDeclState { 336 unsigned SavedStackSize; 337 friend class Sema::DelayedDiagnostics; 338 }; 339 340 class ProcessingContextState { 341 unsigned SavedParsingDepth; 342 unsigned SavedActiveStackBase; 343 friend class Sema::DelayedDiagnostics; 344 }; 345 346 /// A class which encapsulates the logic for delaying diagnostics 347 /// during parsing and other processing. 348 class DelayedDiagnostics { 349 /// \brief The stack of diagnostics that were delayed due to being 350 /// produced during the parsing of a declaration. 351 sema::DelayedDiagnostic *Stack; 352 353 /// \brief The number of objects on the delayed-diagnostics stack. 354 unsigned StackSize; 355 356 /// \brief The current capacity of the delayed-diagnostics stack. 357 unsigned StackCapacity; 358 359 /// \brief The index of the first "active" delayed diagnostic in 360 /// the stack. When parsing class definitions, we ignore active 361 /// delayed diagnostics from the surrounding context. 362 unsigned ActiveStackBase; 363 364 /// \brief The depth of the declarations we're currently parsing. 365 /// This gets saved and reset whenever we enter a class definition. 366 unsigned ParsingDepth; 367 368 public: 369 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 370 ActiveStackBase(0), ParsingDepth(0) {} 371 372 ~DelayedDiagnostics() { 373 delete[] reinterpret_cast<char*>(Stack); 374 } 375 376 /// Adds a delayed diagnostic. 377 void add(const sema::DelayedDiagnostic &diag); 378 379 /// Determines whether diagnostics should be delayed. 380 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 381 382 /// Observe that we've started parsing a declaration. Access and 383 /// deprecation diagnostics will be delayed; when the declaration 384 /// is completed, all active delayed diagnostics will be evaluated 385 /// in its context, and then active diagnostics stack will be 386 /// popped down to the saved depth. 387 ParsingDeclState pushParsingDecl() { 388 ParsingDepth++; 389 390 ParsingDeclState state; 391 state.SavedStackSize = StackSize; 392 return state; 393 } 394 395 /// Observe that we're completed parsing a declaration. 396 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 397 398 /// Observe that we've started processing a different context, the 399 /// contents of which are semantically separate from the 400 /// declarations it may lexically appear in. This sets aside the 401 /// current stack of active diagnostics and starts afresh. 402 ProcessingContextState pushContext() { 403 assert(StackSize >= ActiveStackBase); 404 405 ProcessingContextState state; 406 state.SavedParsingDepth = ParsingDepth; 407 state.SavedActiveStackBase = ActiveStackBase; 408 409 ActiveStackBase = StackSize; 410 ParsingDepth = 0; 411 412 return state; 413 } 414 415 /// Observe that we've stopped processing a context. This 416 /// restores the previous stack of active diagnostics. 417 void popContext(ProcessingContextState state) { 418 assert(ActiveStackBase == StackSize); 419 assert(ParsingDepth == 0); 420 ActiveStackBase = state.SavedActiveStackBase; 421 ParsingDepth = state.SavedParsingDepth; 422 } 423 } DelayedDiagnostics; 424 425 /// A RAII object to temporarily push a declaration context. 426 class ContextRAII { 427 private: 428 Sema &S; 429 DeclContext *SavedContext; 430 ProcessingContextState SavedContextState; 431 432 public: 433 ContextRAII(Sema &S, DeclContext *ContextToPush) 434 : S(S), SavedContext(S.CurContext), 435 SavedContextState(S.DelayedDiagnostics.pushContext()) 436 { 437 assert(ContextToPush && "pushing null context"); 438 S.CurContext = ContextToPush; 439 } 440 441 void pop() { 442 if (!SavedContext) return; 443 S.CurContext = SavedContext; 444 S.DelayedDiagnostics.popContext(SavedContextState); 445 SavedContext = 0; 446 } 447 448 ~ContextRAII() { 449 pop(); 450 } 451 }; 452 453 /// WeakUndeclaredIdentifiers - Identifiers contained in 454 /// #pragma weak before declared. rare. may alias another 455 /// identifier, declared or undeclared 456 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 457 458 /// \brief Load weak undeclared identifiers from the external source. 459 void LoadExternalWeakUndeclaredIdentifiers(); 460 461 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 462 /// #pragma weak during processing of other Decls. 463 /// I couldn't figure out a clean way to generate these in-line, so 464 /// we store them here and handle separately -- which is a hack. 465 /// It would be best to refactor this. 466 SmallVector<Decl*,2> WeakTopLevelDecl; 467 468 IdentifierResolver IdResolver; 469 470 /// Translation Unit Scope - useful to Objective-C actions that need 471 /// to lookup file scope declarations in the "ordinary" C decl namespace. 472 /// For example, user-defined classes, built-in "id" type, etc. 473 Scope *TUScope; 474 475 /// \brief The C++ "std" namespace, where the standard library resides. 476 LazyDeclPtr StdNamespace; 477 478 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 479 /// standard library. 480 LazyDeclPtr StdBadAlloc; 481 482 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 483 RecordDecl *CXXTypeInfoDecl; 484 485 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 486 RecordDecl *MSVCGuidDecl; 487 488 /// A flag to remember whether the implicit forms of operator new and delete 489 /// have been declared. 490 bool GlobalNewDeleteDeclared; 491 492 493 /// A flag that is set when parsing a -dealloc method and no [super dealloc] 494 /// call was found yet. 495 bool ObjCShouldCallSuperDealloc; 496 /// A flag that is set when parsing a -finalize method and no [super finalize] 497 /// call was found yet. 498 bool ObjCShouldCallSuperFinalize; 499 500 /// \brief The set of declarations that have been referenced within 501 /// a potentially evaluated expression. 502 typedef SmallVector<std::pair<SourceLocation, Decl *>, 10> 503 PotentiallyReferencedDecls; 504 505 /// \brief A set of diagnostics that may be emitted. 506 typedef SmallVector<std::pair<SourceLocation, PartialDiagnostic>, 10> 507 PotentiallyEmittedDiagnostics; 508 509 /// \brief Describes how the expressions currently being parsed are 510 /// evaluated at run-time, if at all. 511 enum ExpressionEvaluationContext { 512 /// \brief The current expression and its subexpressions occur within an 513 /// unevaluated operand (C++0x [expr]p8), such as a constant expression 514 /// or the subexpression of \c sizeof, where the type or the value of the 515 /// expression may be significant but no code will be generated to evaluate 516 /// the value of the expression at run time. 517 Unevaluated, 518 519 /// \brief The current expression is potentially evaluated at run time, 520 /// which means that code may be generated to evaluate the value of the 521 /// expression at run time. 522 PotentiallyEvaluated, 523 524 /// \brief The current expression may be potentially evaluated or it may 525 /// be unevaluated, but it is impossible to tell from the lexical context. 526 /// This evaluation context is used primary for the operand of the C++ 527 /// \c typeid expression, whose argument is potentially evaluated only when 528 /// it is an lvalue of polymorphic class type (C++ [basic.def.odr]p2). 529 PotentiallyPotentiallyEvaluated, 530 531 /// \brief The current expression is potentially evaluated, but any 532 /// declarations referenced inside that expression are only used if 533 /// in fact the current expression is used. 534 /// 535 /// This value is used when parsing default function arguments, for which 536 /// we would like to provide diagnostics (e.g., passing non-POD arguments 537 /// through varargs) but do not want to mark declarations as "referenced" 538 /// until the default argument is used. 539 PotentiallyEvaluatedIfUsed 540 }; 541 542 /// \brief Data structure used to record current or nested 543 /// expression evaluation contexts. 544 struct ExpressionEvaluationContextRecord { 545 /// \brief The expression evaluation context. 546 ExpressionEvaluationContext Context; 547 548 /// \brief Whether the enclosing context needed a cleanup. 549 bool ParentNeedsCleanups; 550 551 /// \brief The number of temporaries that were active when we 552 /// entered this expression evaluation context. 553 unsigned NumTemporaries; 554 555 /// \brief The set of declarations referenced within a 556 /// potentially potentially-evaluated context. 557 /// 558 /// When leaving a potentially potentially-evaluated context, each 559 /// of these elements will be as referenced if the corresponding 560 /// potentially potentially evaluated expression is potentially 561 /// evaluated. 562 PotentiallyReferencedDecls *PotentiallyReferenced; 563 564 /// \brief The set of diagnostics to emit should this potentially 565 /// potentially-evaluated context become evaluated. 566 PotentiallyEmittedDiagnostics *PotentiallyDiagnosed; 567 568 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 569 unsigned NumTemporaries, 570 bool ParentNeedsCleanups) 571 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups), 572 NumTemporaries(NumTemporaries), 573 PotentiallyReferenced(0), PotentiallyDiagnosed(0) { } 574 575 void addReferencedDecl(SourceLocation Loc, Decl *Decl) { 576 if (!PotentiallyReferenced) 577 PotentiallyReferenced = new PotentiallyReferencedDecls; 578 PotentiallyReferenced->push_back(std::make_pair(Loc, Decl)); 579 } 580 581 void addDiagnostic(SourceLocation Loc, const PartialDiagnostic &PD) { 582 if (!PotentiallyDiagnosed) 583 PotentiallyDiagnosed = new PotentiallyEmittedDiagnostics; 584 PotentiallyDiagnosed->push_back(std::make_pair(Loc, PD)); 585 } 586 587 void Destroy() { 588 delete PotentiallyReferenced; 589 delete PotentiallyDiagnosed; 590 PotentiallyReferenced = 0; 591 PotentiallyDiagnosed = 0; 592 } 593 }; 594 595 /// A stack of expression evaluation contexts. 596 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 597 598 /// SpecialMemberOverloadResult - The overloading result for a special member 599 /// function. 600 /// 601 /// This is basically a wrapper around PointerIntPair. The lowest bit of the 602 /// integer is used to determine whether we have a parameter qualification 603 /// match, the second-lowest is whether we had success in resolving the 604 /// overload to a unique non-deleted function. 605 /// 606 /// The ConstParamMatch bit represents whether, when looking up a copy 607 /// constructor or assignment operator, we found a potential copy 608 /// constructor/assignment operator whose first parameter is const-qualified. 609 /// This is used for determining parameter types of other objects and is 610 /// utterly meaningless on other types of special members. 611 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 612 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 613 public: 614 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 615 : FastFoldingSetNode(ID) 616 {} 617 618 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 619 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 620 621 bool hasSuccess() const { return Pair.getInt() & 0x1; } 622 void setSuccess(bool B) { 623 Pair.setInt(unsigned(B) | hasConstParamMatch() << 1); 624 } 625 626 bool hasConstParamMatch() const { return Pair.getInt() & 0x2; } 627 void setConstParamMatch(bool B) { 628 Pair.setInt(B << 1 | unsigned(hasSuccess())); 629 } 630 }; 631 632 /// \brief A cache of special member function overload resolution results 633 /// for C++ records. 634 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 635 636 /// \brief The kind of translation unit we are processing. 637 /// 638 /// When we're processing a complete translation unit, Sema will perform 639 /// end-of-translation-unit semantic tasks (such as creating 640 /// initializers for tentative definitions in C) once parsing has 641 /// completed. Modules and precompiled headers perform different kinds of 642 /// checks. 643 TranslationUnitKind TUKind; 644 645 llvm::BumpPtrAllocator BumpAlloc; 646 647 /// \brief The number of SFINAE diagnostics that have been trapped. 648 unsigned NumSFINAEErrors; 649 650 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> > 651 UnparsedDefaultArgInstantiationsMap; 652 653 /// \brief A mapping from parameters with unparsed default arguments to the 654 /// set of instantiations of each parameter. 655 /// 656 /// This mapping is a temporary data structure used when parsing 657 /// nested class templates or nested classes of class templates, 658 /// where we might end up instantiating an inner class before the 659 /// default arguments of its methods have been parsed. 660 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 661 662 // Contains the locations of the beginning of unparsed default 663 // argument locations. 664 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 665 666 /// UndefinedInternals - all the used, undefined objects with 667 /// internal linkage in this translation unit. 668 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 669 670 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 671 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 672 673 /// Method Pool - allows efficient lookup when typechecking messages to "id". 674 /// We need to maintain a list, since selectors can have differing signatures 675 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 676 /// of selectors are "overloaded"). 677 GlobalMethodPool MethodPool; 678 679 /// Method selectors used in a @selector expression. Used for implementation 680 /// of -Wselector. 681 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 682 683 GlobalMethodPool::iterator ReadMethodPool(Selector Sel); 684 685 /// Private Helper predicate to check for 'self'. 686 bool isSelfExpr(Expr *RExpr); 687public: 688 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 689 TranslationUnitKind TUKind = TU_Complete, 690 CodeCompleteConsumer *CompletionConsumer = 0); 691 ~Sema(); 692 693 /// \brief Perform initialization that occurs after the parser has been 694 /// initialized but before it parses anything. 695 void Initialize(); 696 697 const LangOptions &getLangOptions() const { return LangOpts; } 698 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 699 FPOptions &getFPOptions() { return FPFeatures; } 700 701 Diagnostic &getDiagnostics() const { return Diags; } 702 SourceManager &getSourceManager() const { return SourceMgr; } 703 const TargetAttributesSema &getTargetAttributesSema() const; 704 Preprocessor &getPreprocessor() const { return PP; } 705 ASTContext &getASTContext() const { return Context; } 706 ASTConsumer &getASTConsumer() const { return Consumer; } 707 ASTMutationListener *getASTMutationListener() const; 708 709 void PrintStats() const; 710 711 /// \brief Helper class that creates diagnostics with optional 712 /// template instantiation stacks. 713 /// 714 /// This class provides a wrapper around the basic DiagnosticBuilder 715 /// class that emits diagnostics. SemaDiagnosticBuilder is 716 /// responsible for emitting the diagnostic (as DiagnosticBuilder 717 /// does) and, if the diagnostic comes from inside a template 718 /// instantiation, printing the template instantiation stack as 719 /// well. 720 class SemaDiagnosticBuilder : public DiagnosticBuilder { 721 Sema &SemaRef; 722 unsigned DiagID; 723 724 public: 725 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 726 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 727 728 explicit SemaDiagnosticBuilder(Sema &SemaRef) 729 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 730 731 ~SemaDiagnosticBuilder(); 732 }; 733 734 /// \brief Emit a diagnostic. 735 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 736 737 /// \brief Emit a partial diagnostic. 738 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 739 740 /// \brief Build a partial diagnostic. 741 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 742 743 bool findMacroSpelling(SourceLocation &loc, StringRef name); 744 745 ExprResult Owned(Expr* E) { return E; } 746 ExprResult Owned(ExprResult R) { return R; } 747 StmtResult Owned(Stmt* S) { return S; } 748 749 void ActOnEndOfTranslationUnit(); 750 751 void CheckDelegatingCtorCycles(); 752 753 Scope *getScopeForContext(DeclContext *Ctx); 754 755 void PushFunctionScope(); 756 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 757 void PopFunctionOrBlockScope(const sema::AnalysisBasedWarnings::Policy *WP =0, 758 const Decl *D = 0, const BlockExpr *blkExpr = 0); 759 760 sema::FunctionScopeInfo *getCurFunction() const { 761 return FunctionScopes.back(); 762 } 763 764 bool hasAnyUnrecoverableErrorsInThisFunction() const; 765 766 /// \brief Retrieve the current block, if any. 767 sema::BlockScopeInfo *getCurBlock(); 768 769 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 770 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 771 772 //===--------------------------------------------------------------------===// 773 // Type Analysis / Processing: SemaType.cpp. 774 // 775 776 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 777 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 778 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 779 } 780 QualType BuildPointerType(QualType T, 781 SourceLocation Loc, DeclarationName Entity); 782 QualType BuildReferenceType(QualType T, bool LValueRef, 783 SourceLocation Loc, DeclarationName Entity); 784 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 785 Expr *ArraySize, unsigned Quals, 786 SourceRange Brackets, DeclarationName Entity); 787 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 788 SourceLocation AttrLoc); 789 QualType BuildFunctionType(QualType T, 790 QualType *ParamTypes, unsigned NumParamTypes, 791 bool Variadic, unsigned Quals, 792 RefQualifierKind RefQualifier, 793 SourceLocation Loc, DeclarationName Entity, 794 FunctionType::ExtInfo Info); 795 QualType BuildMemberPointerType(QualType T, QualType Class, 796 SourceLocation Loc, 797 DeclarationName Entity); 798 QualType BuildBlockPointerType(QualType T, 799 SourceLocation Loc, DeclarationName Entity); 800 QualType BuildParenType(QualType T); 801 802 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); 803 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); 804 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 805 TypeSourceInfo *ReturnTypeInfo); 806 /// \brief Package the given type and TSI into a ParsedType. 807 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 808 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 809 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 810 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 811 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 812 bool CheckDistantExceptionSpec(QualType T); 813 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 814 bool CheckEquivalentExceptionSpec( 815 const FunctionProtoType *Old, SourceLocation OldLoc, 816 const FunctionProtoType *New, SourceLocation NewLoc); 817 bool CheckEquivalentExceptionSpec( 818 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 819 const FunctionProtoType *Old, SourceLocation OldLoc, 820 const FunctionProtoType *New, SourceLocation NewLoc, 821 bool *MissingExceptionSpecification = 0, 822 bool *MissingEmptyExceptionSpecification = 0, 823 bool AllowNoexceptAllMatchWithNoSpec = false, 824 bool IsOperatorNew = false); 825 bool CheckExceptionSpecSubset( 826 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 827 const FunctionProtoType *Superset, SourceLocation SuperLoc, 828 const FunctionProtoType *Subset, SourceLocation SubLoc); 829 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 830 const FunctionProtoType *Target, SourceLocation TargetLoc, 831 const FunctionProtoType *Source, SourceLocation SourceLoc); 832 833 TypeResult ActOnTypeName(Scope *S, Declarator &D); 834 835 /// \brief The parser has parsed the context-sensitive type 'instancetype' 836 /// in an Objective-C message declaration. Return the appropriate type. 837 ParsedType ActOnObjCInstanceType(SourceLocation Loc); 838 839 bool RequireCompleteType(SourceLocation Loc, QualType T, 840 const PartialDiagnostic &PD, 841 std::pair<SourceLocation, PartialDiagnostic> Note); 842 bool RequireCompleteType(SourceLocation Loc, QualType T, 843 const PartialDiagnostic &PD); 844 bool RequireCompleteType(SourceLocation Loc, QualType T, 845 unsigned DiagID); 846 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 847 std::pair<SourceLocation, 848 PartialDiagnostic> Note); 849 850 851 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 852 const CXXScopeSpec &SS, QualType T); 853 854 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 855 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 856 QualType BuildUnaryTransformType(QualType BaseType, 857 UnaryTransformType::UTTKind UKind, 858 SourceLocation Loc); 859 860 //===--------------------------------------------------------------------===// 861 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 862 // 863 864 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 865 866 void DiagnoseUseOfUnimplementedSelectors(); 867 868 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 869 Scope *S, CXXScopeSpec *SS = 0, 870 bool isClassName = false, 871 bool HasTrailingDot = false, 872 ParsedType ObjectType = ParsedType(), 873 bool WantNontrivialTypeSourceInfo = false); 874 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 875 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS); 876 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 877 SourceLocation IILoc, 878 Scope *S, 879 CXXScopeSpec *SS, 880 ParsedType &SuggestedType); 881 882 /// \brief Describes the result of the name lookup and resolution performed 883 /// by \c ClassifyName(). 884 enum NameClassificationKind { 885 NC_Unknown, 886 NC_Error, 887 NC_Keyword, 888 NC_Type, 889 NC_Expression, 890 NC_NestedNameSpecifier, 891 NC_TypeTemplate, 892 NC_FunctionTemplate 893 }; 894 895 class NameClassification { 896 NameClassificationKind Kind; 897 ExprResult Expr; 898 TemplateName Template; 899 ParsedType Type; 900 const IdentifierInfo *Keyword; 901 902 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 903 904 public: 905 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 906 907 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 908 909 NameClassification(const IdentifierInfo *Keyword) 910 : Kind(NC_Keyword), Keyword(Keyword) { } 911 912 static NameClassification Error() { 913 return NameClassification(NC_Error); 914 } 915 916 static NameClassification Unknown() { 917 return NameClassification(NC_Unknown); 918 } 919 920 static NameClassification NestedNameSpecifier() { 921 return NameClassification(NC_NestedNameSpecifier); 922 } 923 924 static NameClassification TypeTemplate(TemplateName Name) { 925 NameClassification Result(NC_TypeTemplate); 926 Result.Template = Name; 927 return Result; 928 } 929 930 static NameClassification FunctionTemplate(TemplateName Name) { 931 NameClassification Result(NC_FunctionTemplate); 932 Result.Template = Name; 933 return Result; 934 } 935 936 NameClassificationKind getKind() const { return Kind; } 937 938 ParsedType getType() const { 939 assert(Kind == NC_Type); 940 return Type; 941 } 942 943 ExprResult getExpression() const { 944 assert(Kind == NC_Expression); 945 return Expr; 946 } 947 948 TemplateName getTemplateName() const { 949 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 950 return Template; 951 } 952 953 TemplateNameKind getTemplateNameKind() const { 954 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 955 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 956 } 957}; 958 959 /// \brief Perform name lookup on the given name, classifying it based on 960 /// the results of name lookup and the following token. 961 /// 962 /// This routine is used by the parser to resolve identifiers and help direct 963 /// parsing. When the identifier cannot be found, this routine will attempt 964 /// to correct the typo and classify based on the resulting name. 965 /// 966 /// \param S The scope in which we're performing name lookup. 967 /// 968 /// \param SS The nested-name-specifier that precedes the name. 969 /// 970 /// \param Name The identifier. If typo correction finds an alternative name, 971 /// this pointer parameter will be updated accordingly. 972 /// 973 /// \param NameLoc The location of the identifier. 974 /// 975 /// \param NextToken The token following the identifier. Used to help 976 /// disambiguate the name. 977 NameClassification ClassifyName(Scope *S, 978 CXXScopeSpec &SS, 979 IdentifierInfo *&Name, 980 SourceLocation NameLoc, 981 const Token &NextToken); 982 983 Decl *ActOnDeclarator(Scope *S, Declarator &D); 984 985 Decl *HandleDeclarator(Scope *S, Declarator &D, 986 MultiTemplateParamsArg TemplateParameterLists, 987 bool IsFunctionDefinition); 988 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 989 const LookupResult &Previous, 990 Scope *S); 991 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 992 void DiagnoseFunctionSpecifiers(Declarator& D); 993 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 994 void CheckShadow(Scope *S, VarDecl *D); 995 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 996 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 997 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 998 QualType R, TypeSourceInfo *TInfo, 999 LookupResult &Previous, bool &Redeclaration); 1000 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 1001 LookupResult &Previous, bool &Redeclaration); 1002 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1003 QualType R, TypeSourceInfo *TInfo, 1004 LookupResult &Previous, 1005 MultiTemplateParamsArg TemplateParamLists, 1006 bool &Redeclaration); 1007 void CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous, 1008 bool &Redeclaration); 1009 void CheckCompleteVariableDeclaration(VarDecl *var); 1010 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1011 QualType R, TypeSourceInfo *TInfo, 1012 LookupResult &Previous, 1013 MultiTemplateParamsArg TemplateParamLists, 1014 bool IsFunctionDefinition, 1015 bool &Redeclaration, 1016 bool &AddToScope); 1017 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1018 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1019 void CheckFunctionDeclaration(Scope *S, 1020 FunctionDecl *NewFD, LookupResult &Previous, 1021 bool IsExplicitSpecialization, 1022 bool &Redeclaration); 1023 void CheckMain(FunctionDecl *FD, const DeclSpec &D); 1024 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1025 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1026 SourceLocation Loc, 1027 QualType T); 1028 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1029 SourceLocation NameLoc, IdentifierInfo *Name, 1030 QualType T, TypeSourceInfo *TSInfo, 1031 StorageClass SC, StorageClass SCAsWritten); 1032 void ActOnParamDefaultArgument(Decl *param, 1033 SourceLocation EqualLoc, 1034 Expr *defarg); 1035 void ActOnParamUnparsedDefaultArgument(Decl *param, 1036 SourceLocation EqualLoc, 1037 SourceLocation ArgLoc); 1038 void ActOnParamDefaultArgumentError(Decl *param); 1039 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1040 SourceLocation EqualLoc); 1041 1042 void CheckSelfReference(Decl *OrigDecl, Expr *E); 1043 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1044 bool TypeMayContainAuto); 1045 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1046 void ActOnInitializerError(Decl *Dcl); 1047 void ActOnCXXForRangeDecl(Decl *D); 1048 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1049 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1050 void FinalizeDeclaration(Decl *D); 1051 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1052 Decl **Group, 1053 unsigned NumDecls); 1054 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1055 bool TypeMayContainAuto = true); 1056 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1057 SourceLocation LocAfterDecls); 1058 void CheckForFunctionRedefinition(FunctionDecl *FD); 1059 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1060 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1061 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1062 1063 void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope); 1064 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1065 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1066 1067 /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an 1068 /// attribute for which parsing is delayed. 1069 void ActOnFinishDelayedAttribute(Scope *S, Decl *D, ParsedAttributes &Attrs); 1070 1071 /// \brief Diagnose any unused parameters in the given sequence of 1072 /// ParmVarDecl pointers. 1073 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1074 ParmVarDecl * const *End); 1075 1076 /// \brief Diagnose whether the size of parameters or return value of a 1077 /// function or obj-c method definition is pass-by-value and larger than a 1078 /// specified threshold. 1079 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1080 ParmVarDecl * const *End, 1081 QualType ReturnTy, 1082 NamedDecl *D); 1083 1084 void DiagnoseInvalidJumps(Stmt *Body); 1085 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1086 SourceLocation AsmLoc, 1087 SourceLocation RParenLoc); 1088 1089 /// \brief The parser has processed a module import declaration. 1090 /// 1091 /// \param ImportLoc The location of the '__import_module__' keyword. 1092 /// 1093 /// \param ModuleName The name of the module. 1094 /// 1095 /// \param ModuleNameLoc The location of the module name. 1096 DeclResult ActOnModuleImport(SourceLocation ImportLoc, 1097 IdentifierInfo &ModuleName, 1098 SourceLocation ModuleNameLoc); 1099 1100 /// Scope actions. 1101 void ActOnPopScope(SourceLocation Loc, Scope *S); 1102 void ActOnTranslationUnitScope(Scope *S); 1103 1104 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1105 DeclSpec &DS); 1106 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1107 DeclSpec &DS, 1108 MultiTemplateParamsArg TemplateParams); 1109 1110 StmtResult ActOnVlaStmt(const DeclSpec &DS); 1111 1112 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1113 AccessSpecifier AS, 1114 RecordDecl *Record); 1115 1116 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1117 RecordDecl *Record); 1118 1119 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1120 TagTypeKind NewTag, bool isDefinition, 1121 SourceLocation NewTagLoc, 1122 const IdentifierInfo &Name); 1123 1124 enum TagUseKind { 1125 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1126 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1127 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1128 TUK_Friend // Friend declaration: 'friend struct foo;' 1129 }; 1130 1131 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1132 SourceLocation KWLoc, CXXScopeSpec &SS, 1133 IdentifierInfo *Name, SourceLocation NameLoc, 1134 AttributeList *Attr, AccessSpecifier AS, 1135 MultiTemplateParamsArg TemplateParameterLists, 1136 bool &OwnedDecl, bool &IsDependent, bool ScopedEnum, 1137 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1138 1139 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1140 unsigned TagSpec, SourceLocation TagLoc, 1141 CXXScopeSpec &SS, 1142 IdentifierInfo *Name, SourceLocation NameLoc, 1143 AttributeList *Attr, 1144 MultiTemplateParamsArg TempParamLists); 1145 1146 TypeResult ActOnDependentTag(Scope *S, 1147 unsigned TagSpec, 1148 TagUseKind TUK, 1149 const CXXScopeSpec &SS, 1150 IdentifierInfo *Name, 1151 SourceLocation TagLoc, 1152 SourceLocation NameLoc); 1153 1154 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1155 IdentifierInfo *ClassName, 1156 SmallVectorImpl<Decl *> &Decls); 1157 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1158 Declarator &D, Expr *BitfieldWidth); 1159 1160 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1161 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1162 AccessSpecifier AS); 1163 1164 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1165 TypeSourceInfo *TInfo, 1166 RecordDecl *Record, SourceLocation Loc, 1167 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1168 SourceLocation TSSL, 1169 AccessSpecifier AS, NamedDecl *PrevDecl, 1170 Declarator *D = 0); 1171 1172 enum CXXSpecialMember { 1173 CXXDefaultConstructor, 1174 CXXCopyConstructor, 1175 CXXMoveConstructor, 1176 CXXCopyAssignment, 1177 CXXMoveAssignment, 1178 CXXDestructor, 1179 CXXInvalid 1180 }; 1181 bool CheckNontrivialField(FieldDecl *FD); 1182 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1183 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1184 void ActOnLastBitfield(SourceLocation DeclStart, 1185 SmallVectorImpl<Decl *> &AllIvarDecls); 1186 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, 1187 Declarator &D, Expr *BitfieldWidth, 1188 tok::ObjCKeywordKind visibility); 1189 1190 // This is used for both record definitions and ObjC interface declarations. 1191 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1192 Decl **Fields, unsigned NumFields, 1193 SourceLocation LBrac, SourceLocation RBrac, 1194 AttributeList *AttrList); 1195 1196 /// ActOnTagStartDefinition - Invoked when we have entered the 1197 /// scope of a tag's definition (e.g., for an enumeration, class, 1198 /// struct, or union). 1199 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1200 1201 void ActOnObjCContainerStartDefinition(Decl *IDecl); 1202 1203 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1204 /// C++ record definition's base-specifiers clause and are starting its 1205 /// member declarations. 1206 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1207 SourceLocation FinalLoc, 1208 SourceLocation LBraceLoc); 1209 1210 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1211 /// the definition of a tag (enumeration, class, struct, or union). 1212 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1213 SourceLocation RBraceLoc); 1214 1215 void ActOnObjCContainerFinishDefinition(); 1216 1217 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1218 /// error parsing the definition of a tag. 1219 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1220 1221 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1222 EnumConstantDecl *LastEnumConst, 1223 SourceLocation IdLoc, 1224 IdentifierInfo *Id, 1225 Expr *val); 1226 1227 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1228 SourceLocation IdLoc, IdentifierInfo *Id, 1229 AttributeList *Attrs, 1230 SourceLocation EqualLoc, Expr *Val); 1231 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1232 SourceLocation RBraceLoc, Decl *EnumDecl, 1233 Decl **Elements, unsigned NumElements, 1234 Scope *S, AttributeList *Attr); 1235 1236 DeclContext *getContainingDC(DeclContext *DC); 1237 1238 /// Set the current declaration context until it gets popped. 1239 void PushDeclContext(Scope *S, DeclContext *DC); 1240 void PopDeclContext(); 1241 1242 /// EnterDeclaratorContext - Used when we must lookup names in the context 1243 /// of a declarator's nested name specifier. 1244 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1245 void ExitDeclaratorContext(Scope *S); 1246 1247 /// Push the parameters of D, which must be a function, into scope. 1248 void ActOnReenterFunctionContext(Scope* S, Decl* D); 1249 void ActOnExitFunctionContext() { PopDeclContext(); } 1250 1251 DeclContext *getFunctionLevelDeclContext(); 1252 1253 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1254 /// to the function decl for the function being parsed. If we're currently 1255 /// in a 'block', this returns the containing context. 1256 FunctionDecl *getCurFunctionDecl(); 1257 1258 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1259 /// the method decl for the method being parsed. If we're currently 1260 /// in a 'block', this returns the containing context. 1261 ObjCMethodDecl *getCurMethodDecl(); 1262 1263 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1264 /// or C function we're in, otherwise return null. If we're currently 1265 /// in a 'block', this returns the containing context. 1266 NamedDecl *getCurFunctionOrMethodDecl(); 1267 1268 /// Add this decl to the scope shadowed decl chains. 1269 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1270 1271 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1272 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1273 /// true if 'D' belongs to the given declaration context. 1274 /// 1275 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1276 /// whether the declaration is in scope for the purposes of explicit template 1277 /// instantiation or specialization. The default is false. 1278 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1279 bool ExplicitInstantiationOrSpecialization = false); 1280 1281 /// Finds the scope corresponding to the given decl context, if it 1282 /// happens to be an enclosing scope. Otherwise return NULL. 1283 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1284 1285 /// Subroutines of ActOnDeclarator(). 1286 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1287 TypeSourceInfo *TInfo); 1288 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1289 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1290 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1291 void mergeObjCMethodDecls(ObjCMethodDecl *New, const ObjCMethodDecl *Old); 1292 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1293 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1294 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1295 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1296 1297 // AssignmentAction - This is used by all the assignment diagnostic functions 1298 // to represent what is actually causing the operation 1299 enum AssignmentAction { 1300 AA_Assigning, 1301 AA_Passing, 1302 AA_Returning, 1303 AA_Converting, 1304 AA_Initializing, 1305 AA_Sending, 1306 AA_Casting 1307 }; 1308 1309 /// C++ Overloading. 1310 enum OverloadKind { 1311 /// This is a legitimate overload: the existing declarations are 1312 /// functions or function templates with different signatures. 1313 Ovl_Overload, 1314 1315 /// This is not an overload because the signature exactly matches 1316 /// an existing declaration. 1317 Ovl_Match, 1318 1319 /// This is not an overload because the lookup results contain a 1320 /// non-function. 1321 Ovl_NonFunction 1322 }; 1323 OverloadKind CheckOverload(Scope *S, 1324 FunctionDecl *New, 1325 const LookupResult &OldDecls, 1326 NamedDecl *&OldDecl, 1327 bool IsForUsingDecl); 1328 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1329 1330 /// \brief Checks availability of the function depending on the current 1331 /// function context.Inside an unavailable function,unavailability is ignored. 1332 /// 1333 /// \returns true if \arg FD is unavailable and current context is inside 1334 /// an available function, false otherwise. 1335 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1336 1337 ImplicitConversionSequence 1338 TryImplicitConversion(Expr *From, QualType ToType, 1339 bool SuppressUserConversions, 1340 bool AllowExplicit, 1341 bool InOverloadResolution, 1342 bool CStyle, 1343 bool AllowObjCWritebackConversion); 1344 1345 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1346 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1347 bool IsComplexPromotion(QualType FromType, QualType ToType); 1348 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1349 bool InOverloadResolution, 1350 QualType& ConvertedType, bool &IncompatibleObjC); 1351 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1352 QualType& ConvertedType, bool &IncompatibleObjC); 1353 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1354 QualType &ConvertedType); 1355 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1356 QualType& ConvertedType); 1357 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1358 const FunctionProtoType *NewType); 1359 1360 bool CheckPointerConversion(Expr *From, QualType ToType, 1361 CastKind &Kind, 1362 CXXCastPath& BasePath, 1363 bool IgnoreBaseAccess); 1364 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1365 bool InOverloadResolution, 1366 QualType &ConvertedType); 1367 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1368 CastKind &Kind, 1369 CXXCastPath &BasePath, 1370 bool IgnoreBaseAccess); 1371 bool IsQualificationConversion(QualType FromType, QualType ToType, 1372 bool CStyle, bool &ObjCLifetimeConversion); 1373 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1374 QualType &ResultTy); 1375 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1376 1377 1378 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1379 const VarDecl *NRVOCandidate, 1380 QualType ResultType, 1381 Expr *Value, 1382 bool AllowNRVO = true); 1383 1384 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1385 ExprResult Init); 1386 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1387 SourceLocation EqualLoc, 1388 ExprResult Init, 1389 bool TopLevelOfInitList = false); 1390 ExprResult PerformObjectArgumentInitialization(Expr *From, 1391 NestedNameSpecifier *Qualifier, 1392 NamedDecl *FoundDecl, 1393 CXXMethodDecl *Method); 1394 1395 ExprResult PerformContextuallyConvertToBool(Expr *From); 1396 ExprResult PerformContextuallyConvertToObjCId(Expr *From); 1397 1398 ExprResult 1399 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1400 const PartialDiagnostic &NotIntDiag, 1401 const PartialDiagnostic &IncompleteDiag, 1402 const PartialDiagnostic &ExplicitConvDiag, 1403 const PartialDiagnostic &ExplicitConvNote, 1404 const PartialDiagnostic &AmbigDiag, 1405 const PartialDiagnostic &AmbigNote, 1406 const PartialDiagnostic &ConvDiag); 1407 1408 ExprResult PerformObjectMemberConversion(Expr *From, 1409 NestedNameSpecifier *Qualifier, 1410 NamedDecl *FoundDecl, 1411 NamedDecl *Member); 1412 1413 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1414 // TODO: make this is a typesafe union. 1415 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1416 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1417 1418 void AddOverloadCandidate(NamedDecl *Function, 1419 DeclAccessPair FoundDecl, 1420 Expr **Args, unsigned NumArgs, 1421 OverloadCandidateSet &CandidateSet); 1422 1423 void AddOverloadCandidate(FunctionDecl *Function, 1424 DeclAccessPair FoundDecl, 1425 Expr **Args, unsigned NumArgs, 1426 OverloadCandidateSet& CandidateSet, 1427 bool SuppressUserConversions = false, 1428 bool PartialOverloading = false); 1429 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1430 Expr **Args, unsigned NumArgs, 1431 OverloadCandidateSet& CandidateSet, 1432 bool SuppressUserConversions = false); 1433 void AddMethodCandidate(DeclAccessPair FoundDecl, 1434 QualType ObjectType, 1435 Expr::Classification ObjectClassification, 1436 Expr **Args, unsigned NumArgs, 1437 OverloadCandidateSet& CandidateSet, 1438 bool SuppressUserConversion = false); 1439 void AddMethodCandidate(CXXMethodDecl *Method, 1440 DeclAccessPair FoundDecl, 1441 CXXRecordDecl *ActingContext, QualType ObjectType, 1442 Expr::Classification ObjectClassification, 1443 Expr **Args, unsigned NumArgs, 1444 OverloadCandidateSet& CandidateSet, 1445 bool SuppressUserConversions = false); 1446 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1447 DeclAccessPair FoundDecl, 1448 CXXRecordDecl *ActingContext, 1449 TemplateArgumentListInfo *ExplicitTemplateArgs, 1450 QualType ObjectType, 1451 Expr::Classification ObjectClassification, 1452 Expr **Args, unsigned NumArgs, 1453 OverloadCandidateSet& CandidateSet, 1454 bool SuppressUserConversions = false); 1455 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1456 DeclAccessPair FoundDecl, 1457 TemplateArgumentListInfo *ExplicitTemplateArgs, 1458 Expr **Args, unsigned NumArgs, 1459 OverloadCandidateSet& CandidateSet, 1460 bool SuppressUserConversions = false); 1461 void AddConversionCandidate(CXXConversionDecl *Conversion, 1462 DeclAccessPair FoundDecl, 1463 CXXRecordDecl *ActingContext, 1464 Expr *From, QualType ToType, 1465 OverloadCandidateSet& CandidateSet); 1466 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1467 DeclAccessPair FoundDecl, 1468 CXXRecordDecl *ActingContext, 1469 Expr *From, QualType ToType, 1470 OverloadCandidateSet &CandidateSet); 1471 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1472 DeclAccessPair FoundDecl, 1473 CXXRecordDecl *ActingContext, 1474 const FunctionProtoType *Proto, 1475 Expr *Object, Expr **Args, unsigned NumArgs, 1476 OverloadCandidateSet& CandidateSet); 1477 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1478 SourceLocation OpLoc, 1479 Expr **Args, unsigned NumArgs, 1480 OverloadCandidateSet& CandidateSet, 1481 SourceRange OpRange = SourceRange()); 1482 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1483 Expr **Args, unsigned NumArgs, 1484 OverloadCandidateSet& CandidateSet, 1485 bool IsAssignmentOperator = false, 1486 unsigned NumContextualBoolArguments = 0); 1487 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1488 SourceLocation OpLoc, 1489 Expr **Args, unsigned NumArgs, 1490 OverloadCandidateSet& CandidateSet); 1491 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1492 bool Operator, 1493 Expr **Args, unsigned NumArgs, 1494 TemplateArgumentListInfo *ExplicitTemplateArgs, 1495 OverloadCandidateSet& CandidateSet, 1496 bool PartialOverloading = false, 1497 bool StdNamespaceIsAssociated = false); 1498 1499 // Emit as a 'note' the specific overload candidate 1500 void NoteOverloadCandidate(FunctionDecl *Fn); 1501 1502 // Emit as a series of 'note's all template and non-templates 1503 // identified by the expression Expr 1504 void NoteAllOverloadCandidates(Expr* E); 1505 1506 // [PossiblyAFunctionType] --> [Return] 1507 // NonFunctionType --> NonFunctionType 1508 // R (A) --> R(A) 1509 // R (*)(A) --> R (A) 1510 // R (&)(A) --> R (A) 1511 // R (S::*)(A) --> R (A) 1512 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1513 1514 FunctionDecl *ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, QualType TargetType, 1515 bool Complain, 1516 DeclAccessPair &Found); 1517 1518 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1519 bool Complain = false, 1520 DeclAccessPair* Found = 0); 1521 1522 ExprResult ResolveAndFixSingleFunctionTemplateSpecialization( 1523 Expr *SrcExpr, bool DoFunctionPointerConverion = false, 1524 bool Complain = false, 1525 const SourceRange& OpRangeForComplaining = SourceRange(), 1526 QualType DestTypeForComplaining = QualType(), 1527 unsigned DiagIDForComplaining = 0); 1528 1529 1530 Expr *FixOverloadedFunctionReference(Expr *E, 1531 DeclAccessPair FoundDecl, 1532 FunctionDecl *Fn); 1533 ExprResult FixOverloadedFunctionReference(ExprResult, 1534 DeclAccessPair FoundDecl, 1535 FunctionDecl *Fn); 1536 1537 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1538 Expr **Args, unsigned NumArgs, 1539 OverloadCandidateSet &CandidateSet, 1540 bool PartialOverloading = false); 1541 1542 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1543 UnresolvedLookupExpr *ULE, 1544 SourceLocation LParenLoc, 1545 Expr **Args, unsigned NumArgs, 1546 SourceLocation RParenLoc, 1547 Expr *ExecConfig); 1548 1549 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1550 unsigned Opc, 1551 const UnresolvedSetImpl &Fns, 1552 Expr *input); 1553 1554 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1555 unsigned Opc, 1556 const UnresolvedSetImpl &Fns, 1557 Expr *LHS, Expr *RHS); 1558 1559 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1560 SourceLocation RLoc, 1561 Expr *Base,Expr *Idx); 1562 1563 ExprResult 1564 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1565 SourceLocation LParenLoc, Expr **Args, 1566 unsigned NumArgs, SourceLocation RParenLoc); 1567 ExprResult 1568 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1569 Expr **Args, unsigned NumArgs, 1570 SourceLocation RParenLoc); 1571 1572 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1573 SourceLocation OpLoc); 1574 1575 /// CheckCallReturnType - Checks that a call expression's return type is 1576 /// complete. Returns true on failure. The location passed in is the location 1577 /// that best represents the call. 1578 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1579 CallExpr *CE, FunctionDecl *FD); 1580 1581 /// Helpers for dealing with blocks and functions. 1582 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1583 bool CheckParameterNames); 1584 void CheckCXXDefaultArguments(FunctionDecl *FD); 1585 void CheckExtraCXXDefaultArguments(Declarator &D); 1586 Scope *getNonFieldDeclScope(Scope *S); 1587 1588 /// \name Name lookup 1589 /// 1590 /// These routines provide name lookup that is used during semantic 1591 /// analysis to resolve the various kinds of names (identifiers, 1592 /// overloaded operator names, constructor names, etc.) into zero or 1593 /// more declarations within a particular scope. The major entry 1594 /// points are LookupName, which performs unqualified name lookup, 1595 /// and LookupQualifiedName, which performs qualified name lookup. 1596 /// 1597 /// All name lookup is performed based on some specific criteria, 1598 /// which specify what names will be visible to name lookup and how 1599 /// far name lookup should work. These criteria are important both 1600 /// for capturing language semantics (certain lookups will ignore 1601 /// certain names, for example) and for performance, since name 1602 /// lookup is often a bottleneck in the compilation of C++. Name 1603 /// lookup criteria is specified via the LookupCriteria enumeration. 1604 /// 1605 /// The results of name lookup can vary based on the kind of name 1606 /// lookup performed, the current language, and the translation 1607 /// unit. In C, for example, name lookup will either return nothing 1608 /// (no entity found) or a single declaration. In C++, name lookup 1609 /// can additionally refer to a set of overloaded functions or 1610 /// result in an ambiguity. All of the possible results of name 1611 /// lookup are captured by the LookupResult class, which provides 1612 /// the ability to distinguish among them. 1613 //@{ 1614 1615 /// @brief Describes the kind of name lookup to perform. 1616 enum LookupNameKind { 1617 /// Ordinary name lookup, which finds ordinary names (functions, 1618 /// variables, typedefs, etc.) in C and most kinds of names 1619 /// (functions, variables, members, types, etc.) in C++. 1620 LookupOrdinaryName = 0, 1621 /// Tag name lookup, which finds the names of enums, classes, 1622 /// structs, and unions. 1623 LookupTagName, 1624 /// Label name lookup. 1625 LookupLabel, 1626 /// Member name lookup, which finds the names of 1627 /// class/struct/union members. 1628 LookupMemberName, 1629 /// Look up of an operator name (e.g., operator+) for use with 1630 /// operator overloading. This lookup is similar to ordinary name 1631 /// lookup, but will ignore any declarations that are class members. 1632 LookupOperatorName, 1633 /// Look up of a name that precedes the '::' scope resolution 1634 /// operator in C++. This lookup completely ignores operator, object, 1635 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1636 LookupNestedNameSpecifierName, 1637 /// Look up a namespace name within a C++ using directive or 1638 /// namespace alias definition, ignoring non-namespace names (C++ 1639 /// [basic.lookup.udir]p1). 1640 LookupNamespaceName, 1641 /// Look up all declarations in a scope with the given name, 1642 /// including resolved using declarations. This is appropriate 1643 /// for checking redeclarations for a using declaration. 1644 LookupUsingDeclName, 1645 /// Look up an ordinary name that is going to be redeclared as a 1646 /// name with linkage. This lookup ignores any declarations that 1647 /// are outside of the current scope unless they have linkage. See 1648 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1649 LookupRedeclarationWithLinkage, 1650 /// Look up the name of an Objective-C protocol. 1651 LookupObjCProtocolName, 1652 /// Look up implicit 'self' parameter of an objective-c method. 1653 LookupObjCImplicitSelfParam, 1654 /// \brief Look up any declaration with any name. 1655 LookupAnyName 1656 }; 1657 1658 /// \brief Specifies whether (or how) name lookup is being performed for a 1659 /// redeclaration (vs. a reference). 1660 enum RedeclarationKind { 1661 /// \brief The lookup is a reference to this name that is not for the 1662 /// purpose of redeclaring the name. 1663 NotForRedeclaration = 0, 1664 /// \brief The lookup results will be used for redeclaration of a name, 1665 /// if an entity by that name already exists. 1666 ForRedeclaration 1667 }; 1668 1669private: 1670 bool CppLookupName(LookupResult &R, Scope *S); 1671 1672 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1673 CXXSpecialMember SM, 1674 bool ConstArg, 1675 bool VolatileArg, 1676 bool RValueThis, 1677 bool ConstThis, 1678 bool VolatileThis); 1679 1680 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1681 // 1682 // The boolean value will be true to indicate that the namespace was loaded 1683 // from an AST/PCH file, or false otherwise. 1684 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1685 1686 /// \brief Whether we have already loaded known namespaces from an extenal 1687 /// source. 1688 bool LoadedExternalKnownNamespaces; 1689 1690public: 1691 /// \brief Look up a name, looking for a single declaration. Return 1692 /// null if the results were absent, ambiguous, or overloaded. 1693 /// 1694 /// It is preferable to use the elaborated form and explicitly handle 1695 /// ambiguity and overloaded. 1696 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1697 SourceLocation Loc, 1698 LookupNameKind NameKind, 1699 RedeclarationKind Redecl 1700 = NotForRedeclaration); 1701 bool LookupName(LookupResult &R, Scope *S, 1702 bool AllowBuiltinCreation = false); 1703 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1704 bool InUnqualifiedLookup = false); 1705 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1706 bool AllowBuiltinCreation = false, 1707 bool EnteringContext = false); 1708 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1709 1710 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1711 QualType T1, QualType T2, 1712 UnresolvedSetImpl &Functions); 1713 1714 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1715 SourceLocation GnuLabelLoc = SourceLocation()); 1716 1717 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1718 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1719 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1720 unsigned Quals, 1721 bool *ConstParam = 0); 1722 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1723 bool RValueThis, unsigned ThisQuals, 1724 bool *ConstParam = 0); 1725 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class); 1726 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, bool RValueThis, 1727 unsigned ThisQuals); 1728 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1729 1730 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1731 Expr **Args, unsigned NumArgs, 1732 ADLResult &Functions, 1733 bool StdNamespaceIsAssociated = false); 1734 1735 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1736 VisibleDeclConsumer &Consumer, 1737 bool IncludeGlobalScope = true); 1738 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1739 VisibleDeclConsumer &Consumer, 1740 bool IncludeGlobalScope = true); 1741 1742 /// \brief The context in which typo-correction occurs. 1743 /// 1744 /// The typo-correction context affects which keywords (if any) are 1745 /// considered when trying to correct for typos. 1746 enum CorrectTypoContext { 1747 /// \brief An unknown context, where any keyword might be valid. 1748 CTC_Unknown, 1749 /// \brief A context where no keywords are used (e.g. we expect an actual 1750 /// name). 1751 CTC_NoKeywords, 1752 /// \brief A context where we're correcting a type name. 1753 CTC_Type, 1754 /// \brief An expression context. 1755 CTC_Expression, 1756 /// \brief A type cast, or anything else that can be followed by a '<'. 1757 CTC_CXXCasts, 1758 /// \brief A member lookup context. 1759 CTC_MemberLookup, 1760 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1761 CTC_ObjCIvarLookup, 1762 /// \brief An Objective-C property lookup context (e.g., self.prop). 1763 CTC_ObjCPropertyLookup, 1764 /// \brief The receiver of an Objective-C message send within an 1765 /// Objective-C method where 'super' is a valid keyword. 1766 CTC_ObjCMessageReceiver 1767 }; 1768 1769 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1770 Sema::LookupNameKind LookupKind, 1771 Scope *S, CXXScopeSpec *SS, 1772 DeclContext *MemberContext = NULL, 1773 bool EnteringContext = false, 1774 CorrectTypoContext CTC = CTC_Unknown, 1775 const ObjCObjectPointerType *OPT = NULL); 1776 1777 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1778 AssociatedNamespaceSet &AssociatedNamespaces, 1779 AssociatedClassSet &AssociatedClasses); 1780 1781 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1782 bool ConsiderLinkage, 1783 bool ExplicitInstantiationOrSpecialization); 1784 1785 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1786 //@} 1787 1788 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1789 SourceLocation IdLoc, 1790 bool TypoCorrection = false); 1791 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1792 Scope *S, bool ForRedeclaration, 1793 SourceLocation Loc); 1794 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1795 Scope *S); 1796 void AddKnownFunctionAttributes(FunctionDecl *FD); 1797 1798 // More parsing and symbol table subroutines. 1799 1800 // Decl attributes - this routine is the top level dispatcher. 1801 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1802 bool NonInheritable = true, bool Inheritable = true); 1803 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1804 bool NonInheritable = true, bool Inheritable = true); 1805 1806 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1807 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1808 bool CheckNoReturnAttr(const AttributeList &attr); 1809 1810 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1811 bool &IncompleteImpl, unsigned DiagID); 1812 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 1813 ObjCMethodDecl *MethodDecl, 1814 bool IsProtocolMethodDecl, 1815 bool IsDeclaration = false); 1816 1817 /// WarnExactTypedMethods - This routine issues a warning if method 1818 /// implementation declaration matches exactly that of its declaration. 1819 void WarnExactTypedMethods(ObjCMethodDecl *Method, 1820 ObjCMethodDecl *MethodDecl, 1821 bool IsProtocolMethodDecl); 1822 1823 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1824 ObjCInterfaceDecl *IDecl); 1825 1826 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1827 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap; 1828 1829 /// CheckProtocolMethodDefs - This routine checks unimplemented 1830 /// methods declared in protocol, and those referenced by it. 1831 /// \param IDecl - Used for checking for methods which may have been 1832 /// inherited. 1833 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1834 ObjCProtocolDecl *PDecl, 1835 bool& IncompleteImpl, 1836 const SelectorSet &InsMap, 1837 const SelectorSet &ClsMap, 1838 ObjCContainerDecl *CDecl); 1839 1840 /// CheckImplementationIvars - This routine checks if the instance variables 1841 /// listed in the implelementation match those listed in the interface. 1842 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1843 ObjCIvarDecl **Fields, unsigned nIvars, 1844 SourceLocation Loc); 1845 1846 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1847 /// remains unimplemented in the class or category @implementation. 1848 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1849 ObjCContainerDecl* IDecl, 1850 bool IncompleteImpl = false); 1851 1852 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1853 /// which must be implemented by this implementation. 1854 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1855 ObjCContainerDecl *CDecl, 1856 const SelectorSet &InsMap); 1857 1858 /// DefaultSynthesizeProperties - This routine default synthesizes all 1859 /// properties which must be synthesized in class's @implementation. 1860 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1861 ObjCInterfaceDecl *IDecl); 1862 void DefaultSynthesizeProperties(Scope *S, Decl *D); 1863 1864 /// CollectImmediateProperties - This routine collects all properties in 1865 /// the class and its conforming protocols; but not those it its super class. 1866 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1867 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1868 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1869 1870 1871 /// LookupPropertyDecl - Looks up a property in the current class and all 1872 /// its protocols. 1873 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1874 IdentifierInfo *II); 1875 1876 /// Called by ActOnProperty to handle @property declarations in 1877 //// class extensions. 1878 Decl *HandlePropertyInClassExtension(Scope *S, 1879 SourceLocation AtLoc, 1880 FieldDeclarator &FD, 1881 Selector GetterSel, 1882 Selector SetterSel, 1883 const bool isAssign, 1884 const bool isReadWrite, 1885 const unsigned Attributes, 1886 bool *isOverridingProperty, 1887 TypeSourceInfo *T, 1888 tok::ObjCKeywordKind MethodImplKind); 1889 1890 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1891 /// handle creating the ObjcPropertyDecl for a category or @interface. 1892 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1893 ObjCContainerDecl *CDecl, 1894 SourceLocation AtLoc, 1895 FieldDeclarator &FD, 1896 Selector GetterSel, 1897 Selector SetterSel, 1898 const bool isAssign, 1899 const bool isReadWrite, 1900 const unsigned Attributes, 1901 TypeSourceInfo *T, 1902 tok::ObjCKeywordKind MethodImplKind, 1903 DeclContext *lexicalDC = 0); 1904 1905 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1906 /// warning) when atomic property has one but not the other user-declared 1907 /// setter or getter. 1908 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1909 ObjCContainerDecl* IDecl); 1910 1911 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 1912 1913 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1914 1915 enum MethodMatchStrategy { 1916 MMS_loose, 1917 MMS_strict 1918 }; 1919 1920 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1921 /// true, or false, accordingly. 1922 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1923 const ObjCMethodDecl *PrevMethod, 1924 MethodMatchStrategy strategy = MMS_strict); 1925 1926 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1927 /// or protocol against those declared in their implementations. 1928 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1929 const SelectorSet &ClsMap, 1930 SelectorSet &InsMapSeen, 1931 SelectorSet &ClsMapSeen, 1932 ObjCImplDecl* IMPDecl, 1933 ObjCContainerDecl* IDecl, 1934 bool &IncompleteImpl, 1935 bool ImmediateClass, 1936 bool WarnExactMatch=false); 1937 1938 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in 1939 /// category matches with those implemented in its primary class and 1940 /// warns each time an exact match is found. 1941 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP); 1942 1943private: 1944 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1945 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1946 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1947 1948 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1949 /// optionally warns if there are multiple signatures. 1950 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1951 bool receiverIdOrClass, 1952 bool warn, bool instance); 1953 1954public: 1955 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1956 /// unit are added to a global pool. This allows us to efficiently associate 1957 /// a selector with a method declaraation for purposes of typechecking 1958 /// messages sent to "id" (where the class of the object is unknown). 1959 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1960 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1961 } 1962 1963 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1964 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1965 AddMethodToGlobalPool(Method, impl, /*instance*/false); 1966 } 1967 1968 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global 1969 /// pool. 1970 void AddAnyMethodToGlobalPool(Decl *D); 1971 1972 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 1973 /// there are multiple signatures. 1974 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 1975 bool receiverIdOrClass=false, 1976 bool warn=true) { 1977 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1978 warn, /*instance*/true); 1979 } 1980 1981 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 1982 /// there are multiple signatures. 1983 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 1984 bool receiverIdOrClass=false, 1985 bool warn=true) { 1986 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1987 warn, /*instance*/false); 1988 } 1989 1990 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 1991 /// implementation. 1992 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 1993 1994 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 1995 /// initialization. 1996 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 1997 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 1998 1999 //===--------------------------------------------------------------------===// 2000 // Statement Parsing Callbacks: SemaStmt.cpp. 2001public: 2002 class FullExprArg { 2003 public: 2004 FullExprArg(Sema &actions) : E(0) { } 2005 2006 // FIXME: The const_cast here is ugly. RValue references would make this 2007 // much nicer (or we could duplicate a bunch of the move semantics 2008 // emulation code from Ownership.h). 2009 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 2010 2011 ExprResult release() { 2012 return move(E); 2013 } 2014 2015 Expr *get() const { return E; } 2016 2017 Expr *operator->() { 2018 return E; 2019 } 2020 2021 private: 2022 // FIXME: No need to make the entire Sema class a friend when it's just 2023 // Sema::MakeFullExpr that needs access to the constructor below. 2024 friend class Sema; 2025 2026 explicit FullExprArg(Expr *expr) : E(expr) {} 2027 2028 Expr *E; 2029 }; 2030 2031 FullExprArg MakeFullExpr(Expr *Arg) { 2032 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 2033 } 2034 2035 StmtResult ActOnExprStmt(FullExprArg Expr); 2036 2037 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 2038 bool HasLeadingEmptyMacro = false); 2039 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 2040 MultiStmtArg Elts, 2041 bool isStmtExpr); 2042 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2043 SourceLocation StartLoc, 2044 SourceLocation EndLoc); 2045 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2046 StmtResult ActOnForEachLValueExpr(Expr *E); 2047 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2048 SourceLocation DotDotDotLoc, Expr *RHSVal, 2049 SourceLocation ColonLoc); 2050 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2051 2052 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2053 SourceLocation ColonLoc, 2054 Stmt *SubStmt, Scope *CurScope); 2055 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2056 SourceLocation ColonLoc, Stmt *SubStmt); 2057 2058 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2059 FullExprArg CondVal, Decl *CondVar, 2060 Stmt *ThenVal, 2061 SourceLocation ElseLoc, Stmt *ElseVal); 2062 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2063 Expr *Cond, 2064 Decl *CondVar); 2065 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2066 Stmt *Switch, Stmt *Body); 2067 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2068 FullExprArg Cond, 2069 Decl *CondVar, Stmt *Body); 2070 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2071 SourceLocation WhileLoc, 2072 SourceLocation CondLParen, Expr *Cond, 2073 SourceLocation CondRParen); 2074 2075 StmtResult ActOnForStmt(SourceLocation ForLoc, 2076 SourceLocation LParenLoc, 2077 Stmt *First, FullExprArg Second, 2078 Decl *SecondVar, 2079 FullExprArg Third, 2080 SourceLocation RParenLoc, 2081 Stmt *Body); 2082 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc, 2083 Expr *collection); 2084 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2085 SourceLocation LParenLoc, 2086 Stmt *First, Expr *Second, 2087 SourceLocation RParenLoc, Stmt *Body); 2088 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2089 SourceLocation LParenLoc, Stmt *LoopVar, 2090 SourceLocation ColonLoc, Expr *Collection, 2091 SourceLocation RParenLoc); 2092 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2093 SourceLocation ColonLoc, 2094 Stmt *RangeDecl, Stmt *BeginEndDecl, 2095 Expr *Cond, Expr *Inc, 2096 Stmt *LoopVarDecl, 2097 SourceLocation RParenLoc); 2098 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2099 2100 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2101 SourceLocation LabelLoc, 2102 LabelDecl *TheDecl); 2103 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2104 SourceLocation StarLoc, 2105 Expr *DestExp); 2106 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2107 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2108 2109 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2110 bool AllowFunctionParameters); 2111 2112 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2113 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2114 2115 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2116 bool IsSimple, bool IsVolatile, 2117 unsigned NumOutputs, unsigned NumInputs, 2118 IdentifierInfo **Names, 2119 MultiExprArg Constraints, 2120 MultiExprArg Exprs, 2121 Expr *AsmString, 2122 MultiExprArg Clobbers, 2123 SourceLocation RParenLoc, 2124 bool MSAsm = false); 2125 2126 2127 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2128 SourceLocation StartLoc, 2129 SourceLocation IdLoc, IdentifierInfo *Id, 2130 bool Invalid = false); 2131 2132 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2133 2134 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2135 Decl *Parm, Stmt *Body); 2136 2137 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2138 2139 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2140 MultiStmtArg Catch, Stmt *Finally); 2141 2142 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2143 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2144 Scope *CurScope); 2145 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, 2146 Expr *operand); 2147 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2148 Expr *SynchExpr, 2149 Stmt *SynchBody); 2150 2151 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2152 2153 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2154 SourceLocation StartLoc, 2155 SourceLocation IdLoc, 2156 IdentifierInfo *Id); 2157 2158 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2159 2160 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2161 Decl *ExDecl, Stmt *HandlerBlock); 2162 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2163 MultiStmtArg Handlers); 2164 2165 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2166 SourceLocation TryLoc, 2167 Stmt *TryBlock, 2168 Stmt *Handler); 2169 2170 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2171 Expr *FilterExpr, 2172 Stmt *Block); 2173 2174 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2175 Stmt *Block); 2176 2177 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2178 2179 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2180 2181 /// \brief If it's a file scoped decl that must warn if not used, keep track 2182 /// of it. 2183 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2184 2185 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2186 /// whose result is unused, warn. 2187 void DiagnoseUnusedExprResult(const Stmt *S); 2188 void DiagnoseUnusedDecl(const NamedDecl *ND); 2189 2190 ParsingDeclState PushParsingDeclaration() { 2191 return DelayedDiagnostics.pushParsingDecl(); 2192 } 2193 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2194 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2195 } 2196 2197 typedef ProcessingContextState ParsingClassState; 2198 ParsingClassState PushParsingClass() { 2199 return DelayedDiagnostics.pushContext(); 2200 } 2201 void PopParsingClass(ParsingClassState state) { 2202 DelayedDiagnostics.popContext(state); 2203 } 2204 2205 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2206 SourceLocation Loc, 2207 const ObjCInterfaceDecl *UnknownObjCClass=0); 2208 2209 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2210 2211 bool makeUnavailableInSystemHeader(SourceLocation loc, 2212 StringRef message); 2213 2214 //===--------------------------------------------------------------------===// 2215 // Expression Parsing Callbacks: SemaExpr.cpp. 2216 2217 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2218 const ObjCInterfaceDecl *UnknownObjCClass=0); 2219 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2220 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2221 ObjCMethodDecl *Getter, 2222 SourceLocation Loc); 2223 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2224 Expr **Args, unsigned NumArgs); 2225 2226 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 2227 2228 void PopExpressionEvaluationContext(); 2229 2230 void DiscardCleanupsInEvaluationContext(); 2231 2232 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 2233 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2234 void MarkDeclarationsReferencedInExpr(Expr *E); 2235 2236 /// \brief Figure out if an expression could be turned into a call. 2237 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2238 UnresolvedSetImpl &NonTemplateOverloads); 2239 /// \brief Give notes for a set of overloads. 2240 void NoteOverloads(const UnresolvedSetImpl &Overloads, 2241 const SourceLocation FinalNoteLoc); 2242 2243 /// \brief Conditionally issue a diagnostic based on the current 2244 /// evaluation context. 2245 /// 2246 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2247 /// the function body is parsed, and then do a basic reachability analysis to 2248 /// determine if the statement is reachable. If it is unreachable, the 2249 /// diagnostic will not be emitted. 2250 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement, 2251 const PartialDiagnostic &PD); 2252 2253 // Primary Expressions. 2254 SourceRange getExprRange(Expr *E) const; 2255 2256 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Id, 2257 bool HasTrailingLParen, bool IsAddressOfOperand); 2258 2259 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2260 TemplateArgumentListInfo &Buffer, 2261 DeclarationNameInfo &NameInfo, 2262 const TemplateArgumentListInfo *&TemplateArgs); 2263 2264 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2265 CorrectTypoContext CTC = CTC_Unknown, 2266 TemplateArgumentListInfo *ExplicitTemplateArgs = 0, 2267 Expr **Args = 0, unsigned NumArgs = 0); 2268 2269 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S, 2270 IdentifierInfo *II, 2271 bool AllowBuiltinCreation=false); 2272 2273 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2274 const DeclarationNameInfo &NameInfo, 2275 bool isAddressOfOperand, 2276 const TemplateArgumentListInfo *TemplateArgs); 2277 2278 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2279 ExprValueKind VK, 2280 SourceLocation Loc, 2281 const CXXScopeSpec *SS = 0); 2282 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2283 ExprValueKind VK, 2284 const DeclarationNameInfo &NameInfo, 2285 const CXXScopeSpec *SS = 0); 2286 ExprResult 2287 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2288 SourceLocation nameLoc, 2289 IndirectFieldDecl *indirectField, 2290 Expr *baseObjectExpr = 0, 2291 SourceLocation opLoc = SourceLocation()); 2292 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2293 LookupResult &R, 2294 const TemplateArgumentListInfo *TemplateArgs); 2295 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2296 LookupResult &R, 2297 const TemplateArgumentListInfo *TemplateArgs, 2298 bool IsDefiniteInstance); 2299 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2300 const LookupResult &R, 2301 bool HasTrailingLParen); 2302 2303 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2304 const DeclarationNameInfo &NameInfo); 2305 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2306 const DeclarationNameInfo &NameInfo, 2307 const TemplateArgumentListInfo *TemplateArgs); 2308 2309 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2310 LookupResult &R, 2311 bool NeedsADL); 2312 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2313 const DeclarationNameInfo &NameInfo, 2314 NamedDecl *D); 2315 2316 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2317 ExprResult ActOnNumericConstant(const Token &Tok); 2318 ExprResult ActOnCharacterConstant(const Token &Tok); 2319 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E); 2320 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2321 SourceLocation R, 2322 MultiExprArg Val); 2323 2324 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2325 /// fragments (e.g. "foo" "bar" L"baz"). 2326 ExprResult ActOnStringLiteral(const Token *StringToks, 2327 unsigned NumStringToks); 2328 2329 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2330 SourceLocation DefaultLoc, 2331 SourceLocation RParenLoc, 2332 Expr *ControllingExpr, 2333 MultiTypeArg ArgTypes, 2334 MultiExprArg ArgExprs); 2335 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2336 SourceLocation DefaultLoc, 2337 SourceLocation RParenLoc, 2338 Expr *ControllingExpr, 2339 TypeSourceInfo **Types, 2340 Expr **Exprs, 2341 unsigned NumAssocs); 2342 2343 // Binary/Unary Operators. 'Tok' is the token for the operator. 2344 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2345 Expr *InputExpr); 2346 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2347 UnaryOperatorKind Opc, Expr *Input); 2348 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2349 tok::TokenKind Op, Expr *Input); 2350 2351 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo, 2352 SourceLocation OpLoc, 2353 UnaryExprOrTypeTrait ExprKind, 2354 SourceRange R); 2355 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2356 UnaryExprOrTypeTrait ExprKind); 2357 ExprResult 2358 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2359 UnaryExprOrTypeTrait ExprKind, 2360 bool IsType, void *TyOrEx, 2361 const SourceRange &ArgRange); 2362 2363 ExprResult CheckPlaceholderExpr(Expr *E); 2364 bool CheckVecStepExpr(Expr *E); 2365 2366 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2367 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc, 2368 SourceRange ExprRange, 2369 UnaryExprOrTypeTrait ExprKind); 2370 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2371 SourceLocation OpLoc, 2372 IdentifierInfo &Name, 2373 SourceLocation NameLoc, 2374 SourceLocation RParenLoc); 2375 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2376 tok::TokenKind Kind, Expr *Input); 2377 2378 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2379 Expr *Idx, SourceLocation RLoc); 2380 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2381 Expr *Idx, SourceLocation RLoc); 2382 2383 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2384 SourceLocation OpLoc, bool IsArrow, 2385 CXXScopeSpec &SS, 2386 NamedDecl *FirstQualifierInScope, 2387 const DeclarationNameInfo &NameInfo, 2388 const TemplateArgumentListInfo *TemplateArgs); 2389 2390 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2391 SourceLocation OpLoc, bool IsArrow, 2392 const CXXScopeSpec &SS, 2393 NamedDecl *FirstQualifierInScope, 2394 LookupResult &R, 2395 const TemplateArgumentListInfo *TemplateArgs, 2396 bool SuppressQualifierCheck = false); 2397 2398 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2399 bool &IsArrow, SourceLocation OpLoc, 2400 CXXScopeSpec &SS, 2401 Decl *ObjCImpDecl, 2402 bool HasTemplateArgs); 2403 2404 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2405 const CXXScopeSpec &SS, 2406 const LookupResult &R); 2407 2408 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2409 bool IsArrow, SourceLocation OpLoc, 2410 const CXXScopeSpec &SS, 2411 NamedDecl *FirstQualifierInScope, 2412 const DeclarationNameInfo &NameInfo, 2413 const TemplateArgumentListInfo *TemplateArgs); 2414 2415 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2416 SourceLocation OpLoc, 2417 tok::TokenKind OpKind, 2418 CXXScopeSpec &SS, 2419 UnqualifiedId &Member, 2420 Decl *ObjCImpDecl, 2421 bool HasTrailingLParen); 2422 2423 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2424 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2425 FunctionDecl *FDecl, 2426 const FunctionProtoType *Proto, 2427 Expr **Args, unsigned NumArgs, 2428 SourceLocation RParenLoc); 2429 2430 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2431 /// This provides the location of the left/right parens and a list of comma 2432 /// locations. 2433 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2434 MultiExprArg ArgExprs, SourceLocation RParenLoc, 2435 Expr *ExecConfig = 0); 2436 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2437 SourceLocation LParenLoc, 2438 Expr **Args, unsigned NumArgs, 2439 SourceLocation RParenLoc, 2440 Expr *Config = 0); 2441 2442 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2443 MultiExprArg ExecConfig, 2444 SourceLocation GGGLoc); 2445 2446 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2447 Declarator &D, ParsedType &Ty, 2448 SourceLocation RParenLoc, Expr *CastExpr); 2449 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2450 TypeSourceInfo *Ty, 2451 SourceLocation RParenLoc, 2452 Expr *Op); 2453 2454 /// \brief Build an altivec or OpenCL literal. 2455 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2456 SourceLocation RParenLoc, Expr *E, 2457 TypeSourceInfo *TInfo); 2458 2459 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2460 2461 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2462 ParsedType Ty, 2463 SourceLocation RParenLoc, 2464 Expr *InitExpr); 2465 2466 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2467 TypeSourceInfo *TInfo, 2468 SourceLocation RParenLoc, 2469 Expr *LiteralExpr); 2470 2471 ExprResult ActOnInitList(SourceLocation LBraceLoc, 2472 MultiExprArg InitArgList, 2473 SourceLocation RBraceLoc); 2474 2475 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2476 SourceLocation Loc, 2477 bool GNUSyntax, 2478 ExprResult Init); 2479 2480 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2481 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr); 2482 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2483 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr); 2484 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc, 2485 Expr *LHSExpr, Expr *RHSExpr); 2486 2487 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2488 /// in the case of a the GNU conditional expr extension. 2489 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2490 SourceLocation ColonLoc, 2491 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr); 2492 2493 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2494 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2495 LabelDecl *TheDecl); 2496 2497 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2498 SourceLocation RPLoc); // "({..})" 2499 2500 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2501 struct OffsetOfComponent { 2502 SourceLocation LocStart, LocEnd; 2503 bool isBrackets; // true if [expr], false if .ident 2504 union { 2505 IdentifierInfo *IdentInfo; 2506 ExprTy *E; 2507 } U; 2508 }; 2509 2510 /// __builtin_offsetof(type, a.b[123][456].c) 2511 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2512 TypeSourceInfo *TInfo, 2513 OffsetOfComponent *CompPtr, 2514 unsigned NumComponents, 2515 SourceLocation RParenLoc); 2516 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2517 SourceLocation BuiltinLoc, 2518 SourceLocation TypeLoc, 2519 ParsedType ParsedArgTy, 2520 OffsetOfComponent *CompPtr, 2521 unsigned NumComponents, 2522 SourceLocation RParenLoc); 2523 2524 // __builtin_choose_expr(constExpr, expr1, expr2) 2525 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2526 Expr *CondExpr, Expr *LHSExpr, 2527 Expr *RHSExpr, SourceLocation RPLoc); 2528 2529 // __builtin_va_arg(expr, type) 2530 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, 2531 SourceLocation RPLoc); 2532 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E, 2533 TypeSourceInfo *TInfo, SourceLocation RPLoc); 2534 2535 // __null 2536 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2537 2538 bool CheckCaseExpression(Expr *E); 2539 2540 bool CheckMicrosoftIfExistsSymbol(CXXScopeSpec &SS, UnqualifiedId &Name); 2541 2542 //===------------------------- "Block" Extension ------------------------===// 2543 2544 /// ActOnBlockStart - This callback is invoked when a block literal is 2545 /// started. 2546 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2547 2548 /// ActOnBlockArguments - This callback allows processing of block arguments. 2549 /// If there are no arguments, this is still invoked. 2550 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2551 2552 /// ActOnBlockError - If there is an error parsing a block, this callback 2553 /// is invoked to pop the information about the block from the action impl. 2554 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2555 2556 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2557 /// literal was successfully completed. ^(int x){...} 2558 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body, 2559 Scope *CurScope); 2560 2561 //===---------------------------- OpenCL Features -----------------------===// 2562 2563 /// __builtin_astype(...) 2564 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, 2565 SourceLocation BuiltinLoc, 2566 SourceLocation RParenLoc); 2567 2568 //===---------------------------- C++ Features --------------------------===// 2569 2570 // Act on C++ namespaces 2571 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2572 SourceLocation NamespaceLoc, 2573 SourceLocation IdentLoc, 2574 IdentifierInfo *Ident, 2575 SourceLocation LBrace, 2576 AttributeList *AttrList); 2577 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2578 2579 NamespaceDecl *getStdNamespace() const; 2580 NamespaceDecl *getOrCreateStdNamespace(); 2581 2582 CXXRecordDecl *getStdBadAlloc() const; 2583 2584 Decl *ActOnUsingDirective(Scope *CurScope, 2585 SourceLocation UsingLoc, 2586 SourceLocation NamespcLoc, 2587 CXXScopeSpec &SS, 2588 SourceLocation IdentLoc, 2589 IdentifierInfo *NamespcName, 2590 AttributeList *AttrList); 2591 2592 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2593 2594 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2595 SourceLocation NamespaceLoc, 2596 SourceLocation AliasLoc, 2597 IdentifierInfo *Alias, 2598 CXXScopeSpec &SS, 2599 SourceLocation IdentLoc, 2600 IdentifierInfo *Ident); 2601 2602 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2603 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2604 const LookupResult &PreviousDecls); 2605 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2606 NamedDecl *Target); 2607 2608 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2609 bool isTypeName, 2610 const CXXScopeSpec &SS, 2611 SourceLocation NameLoc, 2612 const LookupResult &Previous); 2613 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2614 const CXXScopeSpec &SS, 2615 SourceLocation NameLoc); 2616 2617 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2618 SourceLocation UsingLoc, 2619 CXXScopeSpec &SS, 2620 const DeclarationNameInfo &NameInfo, 2621 AttributeList *AttrList, 2622 bool IsInstantiation, 2623 bool IsTypeName, 2624 SourceLocation TypenameLoc); 2625 2626 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2627 2628 Decl *ActOnUsingDeclaration(Scope *CurScope, 2629 AccessSpecifier AS, 2630 bool HasUsingKeyword, 2631 SourceLocation UsingLoc, 2632 CXXScopeSpec &SS, 2633 UnqualifiedId &Name, 2634 AttributeList *AttrList, 2635 bool IsTypeName, 2636 SourceLocation TypenameLoc); 2637 Decl *ActOnAliasDeclaration(Scope *CurScope, 2638 AccessSpecifier AS, 2639 MultiTemplateParamsArg TemplateParams, 2640 SourceLocation UsingLoc, 2641 UnqualifiedId &Name, 2642 TypeResult Type); 2643 2644 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2645 /// ActOnDeclarator, when a C++ direct initializer is present. 2646 /// e.g: "int x(1);" 2647 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2648 SourceLocation LParenLoc, 2649 MultiExprArg Exprs, 2650 SourceLocation RParenLoc, 2651 bool TypeMayContainAuto); 2652 2653 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2654 /// and sets it as the initializer for the the passed in VarDecl. 2655 bool InitializeVarWithConstructor(VarDecl *VD, 2656 CXXConstructorDecl *Constructor, 2657 MultiExprArg Exprs); 2658 2659 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2660 /// including handling of its default argument expressions. 2661 /// 2662 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2663 ExprResult 2664 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2665 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2666 bool RequiresZeroInit, unsigned ConstructKind, 2667 SourceRange ParenRange); 2668 2669 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2670 // the constructor can be elidable? 2671 ExprResult 2672 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2673 CXXConstructorDecl *Constructor, bool Elidable, 2674 MultiExprArg Exprs, bool RequiresZeroInit, 2675 unsigned ConstructKind, 2676 SourceRange ParenRange); 2677 2678 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2679 /// the default expr if needed. 2680 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2681 FunctionDecl *FD, 2682 ParmVarDecl *Param); 2683 2684 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2685 /// constructed variable. 2686 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2687 2688 /// \brief Helper class that collects exception specifications for 2689 /// implicitly-declared special member functions. 2690 class ImplicitExceptionSpecification { 2691 // Pointer to allow copying 2692 ASTContext *Context; 2693 // We order exception specifications thus: 2694 // noexcept is the most restrictive, but is only used in C++0x. 2695 // throw() comes next. 2696 // Then a throw(collected exceptions) 2697 // Finally no specification. 2698 // throw(...) is used instead if any called function uses it. 2699 // 2700 // If this exception specification cannot be known yet (for instance, 2701 // because this is the exception specification for a defaulted default 2702 // constructor and we haven't finished parsing the deferred parts of the 2703 // class yet), the C++0x standard does not specify how to behave. We 2704 // record this as an 'unknown' exception specification, which overrules 2705 // any other specification (even 'none', to keep this rule simple). 2706 ExceptionSpecificationType ComputedEST; 2707 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2708 SmallVector<QualType, 4> Exceptions; 2709 2710 void ClearExceptions() { 2711 ExceptionsSeen.clear(); 2712 Exceptions.clear(); 2713 } 2714 2715 public: 2716 explicit ImplicitExceptionSpecification(ASTContext &Context) 2717 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2718 if (!Context.getLangOptions().CPlusPlus0x) 2719 ComputedEST = EST_DynamicNone; 2720 } 2721 2722 /// \brief Get the computed exception specification type. 2723 ExceptionSpecificationType getExceptionSpecType() const { 2724 assert(ComputedEST != EST_ComputedNoexcept && 2725 "noexcept(expr) should not be a possible result"); 2726 return ComputedEST; 2727 } 2728 2729 /// \brief The number of exceptions in the exception specification. 2730 unsigned size() const { return Exceptions.size(); } 2731 2732 /// \brief The set of exceptions in the exception specification. 2733 const QualType *data() const { return Exceptions.data(); } 2734 2735 /// \brief Integrate another called method into the collected data. 2736 void CalledDecl(CXXMethodDecl *Method); 2737 2738 /// \brief Integrate an invoked expression into the collected data. 2739 void CalledExpr(Expr *E); 2740 2741 /// \brief Specify that the exception specification can't be detemined yet. 2742 void SetDelayed() { 2743 ClearExceptions(); 2744 ComputedEST = EST_Delayed; 2745 } 2746 2747 FunctionProtoType::ExtProtoInfo getEPI() const { 2748 FunctionProtoType::ExtProtoInfo EPI; 2749 EPI.ExceptionSpecType = getExceptionSpecType(); 2750 EPI.NumExceptions = size(); 2751 EPI.Exceptions = data(); 2752 return EPI; 2753 } 2754 }; 2755 2756 /// \brief Determine what sort of exception specification a defaulted 2757 /// copy constructor of a class will have. 2758 ImplicitExceptionSpecification 2759 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2760 2761 /// \brief Determine what sort of exception specification a defaulted 2762 /// default constructor of a class will have, and whether the parameter 2763 /// will be const. 2764 std::pair<ImplicitExceptionSpecification, bool> 2765 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2766 2767 /// \brief Determine what sort of exception specification a defautled 2768 /// copy assignment operator of a class will have, and whether the 2769 /// parameter will be const. 2770 std::pair<ImplicitExceptionSpecification, bool> 2771 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2772 2773 /// \brief Determine what sort of exception specification a defaulted move 2774 /// constructor of a class will have. 2775 ImplicitExceptionSpecification 2776 ComputeDefaultedMoveCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2777 2778 /// \brief Determine what sort of exception specification a defaulted move 2779 /// assignment operator of a class will have. 2780 ImplicitExceptionSpecification 2781 ComputeDefaultedMoveAssignmentExceptionSpec(CXXRecordDecl *ClassDecl); 2782 2783 /// \brief Determine what sort of exception specification a defaulted 2784 /// destructor of a class will have. 2785 ImplicitExceptionSpecification 2786 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 2787 2788 /// \brief Determine if a defaulted default constructor ought to be 2789 /// deleted. 2790 bool ShouldDeleteDefaultConstructor(CXXConstructorDecl *CD); 2791 2792 /// \brief Determine if a defaulted copy constructor ought to be 2793 /// deleted. 2794 bool ShouldDeleteCopyConstructor(CXXConstructorDecl *CD); 2795 2796 /// \brief Determine if a defaulted copy assignment operator ought to be 2797 /// deleted. 2798 bool ShouldDeleteCopyAssignmentOperator(CXXMethodDecl *MD); 2799 2800 /// \brief Determine if a defaulted move constructor ought to be deleted. 2801 bool ShouldDeleteMoveConstructor(CXXConstructorDecl *CD); 2802 2803 /// \brief Determine if a defaulted move assignment operator ought to be 2804 /// deleted. 2805 bool ShouldDeleteMoveAssignmentOperator(CXXMethodDecl *MD); 2806 2807 /// \brief Determine if a defaulted destructor ought to be deleted. 2808 bool ShouldDeleteDestructor(CXXDestructorDecl *DD); 2809 2810 /// \brief Declare the implicit default constructor for the given class. 2811 /// 2812 /// \param ClassDecl The class declaration into which the implicit 2813 /// default constructor will be added. 2814 /// 2815 /// \returns The implicitly-declared default constructor. 2816 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2817 CXXRecordDecl *ClassDecl); 2818 2819 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2820 /// defining this constructor as the default constructor. 2821 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2822 CXXConstructorDecl *Constructor); 2823 2824 /// \brief Declare the implicit destructor for the given class. 2825 /// 2826 /// \param ClassDecl The class declaration into which the implicit 2827 /// destructor will be added. 2828 /// 2829 /// \returns The implicitly-declared destructor. 2830 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2831 2832 /// DefineImplicitDestructor - Checks for feasibility of 2833 /// defining this destructor as the default destructor. 2834 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2835 CXXDestructorDecl *Destructor); 2836 2837 /// \brief Build an exception spec for destructors that don't have one. 2838 /// 2839 /// C++11 says that user-defined destructors with no exception spec get one 2840 /// that looks as if the destructor was implicitly declared. 2841 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 2842 CXXDestructorDecl *Destructor); 2843 2844 /// \brief Declare all inherited constructors for the given class. 2845 /// 2846 /// \param ClassDecl The class declaration into which the inherited 2847 /// constructors will be added. 2848 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2849 2850 /// \brief Declare the implicit copy constructor for the given class. 2851 /// 2852 /// \param ClassDecl The class declaration into which the implicit 2853 /// copy constructor will be added. 2854 /// 2855 /// \returns The implicitly-declared copy constructor. 2856 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2857 2858 /// DefineImplicitCopyConstructor - Checks for feasibility of 2859 /// defining this constructor as the copy constructor. 2860 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2861 CXXConstructorDecl *Constructor); 2862 2863 /// \brief Declare the implicit move constructor for the given class. 2864 /// 2865 /// \param ClassDecl The Class declaration into which the implicit 2866 /// move constructor will be added. 2867 /// 2868 /// \returns The implicitly-declared move constructor, or NULL if it wasn't 2869 /// declared. 2870 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl); 2871 2872 /// DefineImplicitMoveConstructor - Checks for feasibility of 2873 /// defining this constructor as the move constructor. 2874 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation, 2875 CXXConstructorDecl *Constructor); 2876 2877 /// \brief Declare the implicit copy assignment operator for the given class. 2878 /// 2879 /// \param ClassDecl The class declaration into which the implicit 2880 /// copy assignment operator will be added. 2881 /// 2882 /// \returns The implicitly-declared copy assignment operator. 2883 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2884 2885 /// \brief Defines an implicitly-declared copy assignment operator. 2886 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2887 CXXMethodDecl *MethodDecl); 2888 2889 /// \brief Declare the implicit move assignment operator for the given class. 2890 /// 2891 /// \param ClassDecl The Class declaration into which the implicit 2892 /// move assignment operator will be added. 2893 /// 2894 /// \returns The implicitly-declared move assignment operator, or NULL if it 2895 /// wasn't declared. 2896 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl); 2897 2898 /// \brief Defines an implicitly-declared move assignment operator. 2899 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation, 2900 CXXMethodDecl *MethodDecl); 2901 2902 /// \brief Force the declaration of any implicitly-declared members of this 2903 /// class. 2904 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2905 2906 /// MaybeBindToTemporary - If the passed in expression has a record type with 2907 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 2908 /// it simply returns the passed in expression. 2909 ExprResult MaybeBindToTemporary(Expr *E); 2910 2911 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 2912 MultiExprArg ArgsPtr, 2913 SourceLocation Loc, 2914 ASTOwningVector<Expr*> &ConvertedArgs); 2915 2916 ParsedType getDestructorName(SourceLocation TildeLoc, 2917 IdentifierInfo &II, SourceLocation NameLoc, 2918 Scope *S, CXXScopeSpec &SS, 2919 ParsedType ObjectType, 2920 bool EnteringContext); 2921 2922 // Checks that reinterpret casts don't have undefined behavior. 2923 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 2924 bool IsDereference, SourceRange Range); 2925 2926 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 2927 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 2928 tok::TokenKind Kind, 2929 SourceLocation LAngleBracketLoc, 2930 Declarator &D, 2931 SourceLocation RAngleBracketLoc, 2932 SourceLocation LParenLoc, 2933 Expr *E, 2934 SourceLocation RParenLoc); 2935 2936 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 2937 tok::TokenKind Kind, 2938 TypeSourceInfo *Ty, 2939 Expr *E, 2940 SourceRange AngleBrackets, 2941 SourceRange Parens); 2942 2943 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2944 SourceLocation TypeidLoc, 2945 TypeSourceInfo *Operand, 2946 SourceLocation RParenLoc); 2947 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2948 SourceLocation TypeidLoc, 2949 Expr *Operand, 2950 SourceLocation RParenLoc); 2951 2952 /// ActOnCXXTypeid - Parse typeid( something ). 2953 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 2954 SourceLocation LParenLoc, bool isType, 2955 void *TyOrExpr, 2956 SourceLocation RParenLoc); 2957 2958 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2959 SourceLocation TypeidLoc, 2960 TypeSourceInfo *Operand, 2961 SourceLocation RParenLoc); 2962 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2963 SourceLocation TypeidLoc, 2964 Expr *Operand, 2965 SourceLocation RParenLoc); 2966 2967 /// ActOnCXXUuidof - Parse __uuidof( something ). 2968 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 2969 SourceLocation LParenLoc, bool isType, 2970 void *TyOrExpr, 2971 SourceLocation RParenLoc); 2972 2973 2974 //// ActOnCXXThis - Parse 'this' pointer. 2975 ExprResult ActOnCXXThis(SourceLocation loc); 2976 2977 /// getAndCaptureCurrentThisType - Try to capture a 'this' pointer. Returns 2978 /// the type of the 'this' pointer, or a null type if this is not possible. 2979 QualType getAndCaptureCurrentThisType(); 2980 2981 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 2982 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 2983 2984 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 2985 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 2986 2987 //// ActOnCXXThrow - Parse throw expressions. 2988 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 2989 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 2990 bool IsThrownVarInScope); 2991 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 2992 bool IsThrownVarInScope); 2993 2994 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 2995 /// Can be interpreted either as function-style casting ("int(x)") 2996 /// or class type construction ("ClassType(x,y,z)") 2997 /// or creation of a value-initialized type ("int()"). 2998 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 2999 SourceLocation LParenLoc, 3000 MultiExprArg Exprs, 3001 SourceLocation RParenLoc); 3002 3003 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 3004 SourceLocation LParenLoc, 3005 MultiExprArg Exprs, 3006 SourceLocation RParenLoc); 3007 3008 /// ActOnCXXNew - Parsed a C++ 'new' expression. 3009 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 3010 SourceLocation PlacementLParen, 3011 MultiExprArg PlacementArgs, 3012 SourceLocation PlacementRParen, 3013 SourceRange TypeIdParens, Declarator &D, 3014 SourceLocation ConstructorLParen, 3015 MultiExprArg ConstructorArgs, 3016 SourceLocation ConstructorRParen); 3017 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 3018 SourceLocation PlacementLParen, 3019 MultiExprArg PlacementArgs, 3020 SourceLocation PlacementRParen, 3021 SourceRange TypeIdParens, 3022 QualType AllocType, 3023 TypeSourceInfo *AllocTypeInfo, 3024 Expr *ArraySize, 3025 SourceLocation ConstructorLParen, 3026 MultiExprArg ConstructorArgs, 3027 SourceLocation ConstructorRParen, 3028 bool TypeMayContainAuto = true); 3029 3030 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 3031 SourceRange R); 3032 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 3033 bool UseGlobal, QualType AllocType, bool IsArray, 3034 Expr **PlaceArgs, unsigned NumPlaceArgs, 3035 FunctionDecl *&OperatorNew, 3036 FunctionDecl *&OperatorDelete); 3037 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 3038 DeclarationName Name, Expr** Args, 3039 unsigned NumArgs, DeclContext *Ctx, 3040 bool AllowMissing, FunctionDecl *&Operator, 3041 bool Diagnose = true); 3042 void DeclareGlobalNewDelete(); 3043 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 3044 QualType Argument, 3045 bool addMallocAttr = false); 3046 3047 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 3048 DeclarationName Name, FunctionDecl* &Operator, 3049 bool Diagnose = true); 3050 3051 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 3052 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 3053 bool UseGlobal, bool ArrayForm, 3054 Expr *Operand); 3055 3056 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 3057 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 3058 SourceLocation StmtLoc, 3059 bool ConvertToBoolean); 3060 3061 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 3062 Expr *Operand, SourceLocation RParen); 3063 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 3064 SourceLocation RParen); 3065 3066 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 3067 /// pseudo-functions. 3068 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 3069 SourceLocation KWLoc, 3070 ParsedType Ty, 3071 SourceLocation RParen); 3072 3073 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3074 SourceLocation KWLoc, 3075 TypeSourceInfo *T, 3076 SourceLocation RParen); 3077 3078 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3079 /// pseudo-functions. 3080 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3081 SourceLocation KWLoc, 3082 ParsedType LhsTy, 3083 ParsedType RhsTy, 3084 SourceLocation RParen); 3085 3086 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3087 SourceLocation KWLoc, 3088 TypeSourceInfo *LhsT, 3089 TypeSourceInfo *RhsT, 3090 SourceLocation RParen); 3091 3092 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3093 /// pseudo-functions. 3094 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3095 SourceLocation KWLoc, 3096 ParsedType LhsTy, 3097 Expr *DimExpr, 3098 SourceLocation RParen); 3099 3100 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3101 SourceLocation KWLoc, 3102 TypeSourceInfo *TSInfo, 3103 Expr *DimExpr, 3104 SourceLocation RParen); 3105 3106 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3107 /// pseudo-functions. 3108 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3109 SourceLocation KWLoc, 3110 Expr *Queried, 3111 SourceLocation RParen); 3112 3113 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3114 SourceLocation KWLoc, 3115 Expr *Queried, 3116 SourceLocation RParen); 3117 3118 ExprResult ActOnStartCXXMemberReference(Scope *S, 3119 Expr *Base, 3120 SourceLocation OpLoc, 3121 tok::TokenKind OpKind, 3122 ParsedType &ObjectType, 3123 bool &MayBePseudoDestructor); 3124 3125 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3126 3127 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3128 SourceLocation OpLoc, 3129 tok::TokenKind OpKind, 3130 const CXXScopeSpec &SS, 3131 TypeSourceInfo *ScopeType, 3132 SourceLocation CCLoc, 3133 SourceLocation TildeLoc, 3134 PseudoDestructorTypeStorage DestroyedType, 3135 bool HasTrailingLParen); 3136 3137 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3138 SourceLocation OpLoc, 3139 tok::TokenKind OpKind, 3140 CXXScopeSpec &SS, 3141 UnqualifiedId &FirstTypeName, 3142 SourceLocation CCLoc, 3143 SourceLocation TildeLoc, 3144 UnqualifiedId &SecondTypeName, 3145 bool HasTrailingLParen); 3146 3147 /// MaybeCreateExprWithCleanups - If the current full-expression 3148 /// requires any cleanups, surround it with a ExprWithCleanups node. 3149 /// Otherwise, just returns the passed-in expression. 3150 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3151 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3152 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3153 3154 ExprResult ActOnFinishFullExpr(Expr *Expr); 3155 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3156 3157 // Marks SS invalid if it represents an incomplete type. 3158 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3159 3160 DeclContext *computeDeclContext(QualType T); 3161 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3162 bool EnteringContext = false); 3163 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3164 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3165 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3166 3167 /// \brief The parser has parsed a global nested-name-specifier '::'. 3168 /// 3169 /// \param S The scope in which this nested-name-specifier occurs. 3170 /// 3171 /// \param CCLoc The location of the '::'. 3172 /// 3173 /// \param SS The nested-name-specifier, which will be updated in-place 3174 /// to reflect the parsed nested-name-specifier. 3175 /// 3176 /// \returns true if an error occurred, false otherwise. 3177 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3178 CXXScopeSpec &SS); 3179 3180 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3181 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3182 3183 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3184 SourceLocation IdLoc, 3185 IdentifierInfo &II, 3186 ParsedType ObjectType); 3187 3188 bool BuildCXXNestedNameSpecifier(Scope *S, 3189 IdentifierInfo &Identifier, 3190 SourceLocation IdentifierLoc, 3191 SourceLocation CCLoc, 3192 QualType ObjectType, 3193 bool EnteringContext, 3194 CXXScopeSpec &SS, 3195 NamedDecl *ScopeLookupResult, 3196 bool ErrorRecoveryLookup); 3197 3198 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3199 /// 3200 /// \param S The scope in which this nested-name-specifier occurs. 3201 /// 3202 /// \param Identifier The identifier preceding the '::'. 3203 /// 3204 /// \param IdentifierLoc The location of the identifier. 3205 /// 3206 /// \param CCLoc The location of the '::'. 3207 /// 3208 /// \param ObjectType The type of the object, if we're parsing 3209 /// nested-name-specifier in a member access expression. 3210 /// 3211 /// \param EnteringContext Whether we're entering the context nominated by 3212 /// this nested-name-specifier. 3213 /// 3214 /// \param SS The nested-name-specifier, which is both an input 3215 /// parameter (the nested-name-specifier before this type) and an 3216 /// output parameter (containing the full nested-name-specifier, 3217 /// including this new type). 3218 /// 3219 /// \returns true if an error occurred, false otherwise. 3220 bool ActOnCXXNestedNameSpecifier(Scope *S, 3221 IdentifierInfo &Identifier, 3222 SourceLocation IdentifierLoc, 3223 SourceLocation CCLoc, 3224 ParsedType ObjectType, 3225 bool EnteringContext, 3226 CXXScopeSpec &SS); 3227 3228 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3229 IdentifierInfo &Identifier, 3230 SourceLocation IdentifierLoc, 3231 SourceLocation ColonLoc, 3232 ParsedType ObjectType, 3233 bool EnteringContext); 3234 3235 /// \brief The parser has parsed a nested-name-specifier 3236 /// 'template[opt] template-name < template-args >::'. 3237 /// 3238 /// \param S The scope in which this nested-name-specifier occurs. 3239 /// 3240 /// \param TemplateLoc The location of the 'template' keyword, if any. 3241 /// 3242 /// \param SS The nested-name-specifier, which is both an input 3243 /// parameter (the nested-name-specifier before this type) and an 3244 /// output parameter (containing the full nested-name-specifier, 3245 /// including this new type). 3246 /// 3247 /// \param TemplateLoc the location of the 'template' keyword, if any. 3248 /// \param TemplateName The template name. 3249 /// \param TemplateNameLoc The location of the template name. 3250 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3251 /// \param TemplateArgs The template arguments. 3252 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3253 /// \param CCLoc The location of the '::'. 3254 3255 /// \param EnteringContext Whether we're entering the context of the 3256 /// nested-name-specifier. 3257 /// 3258 /// 3259 /// \returns true if an error occurred, false otherwise. 3260 bool ActOnCXXNestedNameSpecifier(Scope *S, 3261 SourceLocation TemplateLoc, 3262 CXXScopeSpec &SS, 3263 TemplateTy Template, 3264 SourceLocation TemplateNameLoc, 3265 SourceLocation LAngleLoc, 3266 ASTTemplateArgsPtr TemplateArgs, 3267 SourceLocation RAngleLoc, 3268 SourceLocation CCLoc, 3269 bool EnteringContext); 3270 3271 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3272 /// that the parser can use later to reconstruct the given 3273 /// nested-name-specifier. 3274 /// 3275 /// \param SS A nested-name-specifier. 3276 /// 3277 /// \returns A pointer containing all of the information in the 3278 /// nested-name-specifier \p SS. 3279 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3280 3281 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3282 /// the nested-name-specifier structure. 3283 /// 3284 /// \param Annotation The annotation pointer, produced by 3285 /// \c SaveNestedNameSpecifierAnnotation(). 3286 /// 3287 /// \param AnnotationRange The source range corresponding to the annotation. 3288 /// 3289 /// \param SS The nested-name-specifier that will be updated with the contents 3290 /// of the annotation pointer. 3291 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3292 SourceRange AnnotationRange, 3293 CXXScopeSpec &SS); 3294 3295 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3296 3297 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3298 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3299 /// After this method is called, according to [C++ 3.4.3p3], names should be 3300 /// looked up in the declarator-id's scope, until the declarator is parsed and 3301 /// ActOnCXXExitDeclaratorScope is called. 3302 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3303 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3304 3305 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3306 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3307 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3308 /// Used to indicate that names should revert to being looked up in the 3309 /// defining scope. 3310 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3311 3312 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3313 /// initializer for the declaration 'Dcl'. 3314 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3315 /// static data member of class X, names should be looked up in the scope of 3316 /// class X. 3317 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3318 3319 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3320 /// initializer for the declaration 'Dcl'. 3321 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3322 3323 // ParseObjCStringLiteral - Parse Objective-C string literals. 3324 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3325 Expr **Strings, 3326 unsigned NumStrings); 3327 3328 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3329 TypeSourceInfo *EncodedTypeInfo, 3330 SourceLocation RParenLoc); 3331 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3332 CXXMethodDecl *Method); 3333 3334 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3335 SourceLocation EncodeLoc, 3336 SourceLocation LParenLoc, 3337 ParsedType Ty, 3338 SourceLocation RParenLoc); 3339 3340 // ParseObjCSelectorExpression - Build selector expression for @selector 3341 ExprResult ParseObjCSelectorExpression(Selector Sel, 3342 SourceLocation AtLoc, 3343 SourceLocation SelLoc, 3344 SourceLocation LParenLoc, 3345 SourceLocation RParenLoc); 3346 3347 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3348 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3349 SourceLocation AtLoc, 3350 SourceLocation ProtoLoc, 3351 SourceLocation LParenLoc, 3352 SourceLocation RParenLoc); 3353 3354 //===--------------------------------------------------------------------===// 3355 // C++ Declarations 3356 // 3357 Decl *ActOnStartLinkageSpecification(Scope *S, 3358 SourceLocation ExternLoc, 3359 SourceLocation LangLoc, 3360 StringRef Lang, 3361 SourceLocation LBraceLoc); 3362 Decl *ActOnFinishLinkageSpecification(Scope *S, 3363 Decl *LinkageSpec, 3364 SourceLocation RBraceLoc); 3365 3366 3367 //===--------------------------------------------------------------------===// 3368 // C++ Classes 3369 // 3370 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3371 const CXXScopeSpec *SS = 0); 3372 3373 Decl *ActOnAccessSpecifier(AccessSpecifier Access, 3374 SourceLocation ASLoc, 3375 SourceLocation ColonLoc); 3376 3377 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3378 Declarator &D, 3379 MultiTemplateParamsArg TemplateParameterLists, 3380 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3381 Expr *Init, bool HasDeferredInit, 3382 bool IsDefinition); 3383 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3384 Expr *Init); 3385 3386 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3387 Scope *S, 3388 CXXScopeSpec &SS, 3389 IdentifierInfo *MemberOrBase, 3390 ParsedType TemplateTypeTy, 3391 SourceLocation IdLoc, 3392 SourceLocation LParenLoc, 3393 Expr **Args, unsigned NumArgs, 3394 SourceLocation RParenLoc, 3395 SourceLocation EllipsisLoc); 3396 3397 MemInitResult BuildMemberInitializer(ValueDecl *Member, Expr **Args, 3398 unsigned NumArgs, SourceLocation IdLoc, 3399 SourceLocation LParenLoc, 3400 SourceLocation RParenLoc); 3401 3402 MemInitResult BuildBaseInitializer(QualType BaseType, 3403 TypeSourceInfo *BaseTInfo, 3404 Expr **Args, unsigned NumArgs, 3405 SourceLocation LParenLoc, 3406 SourceLocation RParenLoc, 3407 CXXRecordDecl *ClassDecl, 3408 SourceLocation EllipsisLoc); 3409 3410 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3411 Expr **Args, unsigned NumArgs, 3412 SourceLocation BaseLoc, 3413 SourceLocation RParenLoc, 3414 SourceLocation LParenLoc, 3415 CXXRecordDecl *ClassDecl); 3416 3417 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3418 CXXCtorInitializer *Initializer); 3419 3420 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3421 CXXCtorInitializer **Initializers, 3422 unsigned NumInitializers, bool AnyErrors); 3423 3424 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3425 3426 3427 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3428 /// mark all the non-trivial destructors of its members and bases as 3429 /// referenced. 3430 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3431 CXXRecordDecl *Record); 3432 3433 /// \brief The list of classes whose vtables have been used within 3434 /// this translation unit, and the source locations at which the 3435 /// first use occurred. 3436 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3437 3438 /// \brief The list of vtables that are required but have not yet been 3439 /// materialized. 3440 SmallVector<VTableUse, 16> VTableUses; 3441 3442 /// \brief The set of classes whose vtables have been used within 3443 /// this translation unit, and a bit that will be true if the vtable is 3444 /// required to be emitted (otherwise, it should be emitted only if needed 3445 /// by code generation). 3446 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3447 3448 /// \brief Load any externally-stored vtable uses. 3449 void LoadExternalVTableUses(); 3450 3451 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 3452 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 3453 DynamicClassesType; 3454 3455 /// \brief A list of all of the dynamic classes in this translation 3456 /// unit. 3457 DynamicClassesType DynamicClasses; 3458 3459 /// \brief Note that the vtable for the given class was used at the 3460 /// given location. 3461 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3462 bool DefinitionRequired = false); 3463 3464 /// MarkVirtualMembersReferenced - Will mark all members of the given 3465 /// CXXRecordDecl referenced. 3466 void MarkVirtualMembersReferenced(SourceLocation Loc, 3467 const CXXRecordDecl *RD); 3468 3469 /// \brief Define all of the vtables that have been used in this 3470 /// translation unit and reference any virtual members used by those 3471 /// vtables. 3472 /// 3473 /// \returns true if any work was done, false otherwise. 3474 bool DefineUsedVTables(); 3475 3476 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3477 3478 void ActOnMemInitializers(Decl *ConstructorDecl, 3479 SourceLocation ColonLoc, 3480 MemInitTy **MemInits, unsigned NumMemInits, 3481 bool AnyErrors); 3482 3483 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3484 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3485 Decl *TagDecl, 3486 SourceLocation LBrac, 3487 SourceLocation RBrac, 3488 AttributeList *AttrList); 3489 3490 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3491 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3492 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3493 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3494 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3495 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3496 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3497 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3498 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3499 bool IsInsideALocalClassWithinATemplateFunction(); 3500 3501 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3502 Expr *AssertExpr, 3503 Expr *AssertMessageExpr, 3504 SourceLocation RParenLoc); 3505 3506 FriendDecl *CheckFriendTypeDecl(SourceLocation FriendLoc, 3507 TypeSourceInfo *TSInfo); 3508 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3509 MultiTemplateParamsArg TemplateParams); 3510 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, bool IsDefinition, 3511 MultiTemplateParamsArg TemplateParams); 3512 3513 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3514 StorageClass& SC); 3515 void CheckConstructor(CXXConstructorDecl *Constructor); 3516 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3517 StorageClass& SC); 3518 bool CheckDestructor(CXXDestructorDecl *Destructor); 3519 void CheckConversionDeclarator(Declarator &D, QualType &R, 3520 StorageClass& SC); 3521 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3522 3523 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3524 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3525 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3526 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3527 void CheckExplicitlyDefaultedMoveConstructor(CXXConstructorDecl *Ctor); 3528 void CheckExplicitlyDefaultedMoveAssignment(CXXMethodDecl *Method); 3529 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3530 3531 //===--------------------------------------------------------------------===// 3532 // C++ Derived Classes 3533 // 3534 3535 /// ActOnBaseSpecifier - Parsed a base specifier 3536 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3537 SourceRange SpecifierRange, 3538 bool Virtual, AccessSpecifier Access, 3539 TypeSourceInfo *TInfo, 3540 SourceLocation EllipsisLoc); 3541 3542 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3543 SourceRange SpecifierRange, 3544 bool Virtual, AccessSpecifier Access, 3545 ParsedType basetype, 3546 SourceLocation BaseLoc, 3547 SourceLocation EllipsisLoc); 3548 3549 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3550 unsigned NumBases); 3551 void ActOnBaseSpecifiers(Decl *ClassDecl, BaseTy **Bases, unsigned NumBases); 3552 3553 bool IsDerivedFrom(QualType Derived, QualType Base); 3554 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3555 3556 // FIXME: I don't like this name. 3557 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3558 3559 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3560 3561 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3562 SourceLocation Loc, SourceRange Range, 3563 CXXCastPath *BasePath = 0, 3564 bool IgnoreAccess = false); 3565 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3566 unsigned InaccessibleBaseID, 3567 unsigned AmbigiousBaseConvID, 3568 SourceLocation Loc, SourceRange Range, 3569 DeclarationName Name, 3570 CXXCastPath *BasePath); 3571 3572 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3573 3574 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3575 /// covariant, according to C++ [class.virtual]p5. 3576 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3577 const CXXMethodDecl *Old); 3578 3579 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3580 /// spec is a subset of base spec. 3581 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3582 const CXXMethodDecl *Old); 3583 3584 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3585 3586 /// CheckOverrideControl - Check C++0x override control semantics. 3587 void CheckOverrideControl(const Decl *D); 3588 3589 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3590 /// overrides a virtual member function marked 'final', according to 3591 /// C++0x [class.virtual]p3. 3592 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3593 const CXXMethodDecl *Old); 3594 3595 3596 //===--------------------------------------------------------------------===// 3597 // C++ Access Control 3598 // 3599 3600 enum AccessResult { 3601 AR_accessible, 3602 AR_inaccessible, 3603 AR_dependent, 3604 AR_delayed 3605 }; 3606 3607 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3608 NamedDecl *PrevMemberDecl, 3609 AccessSpecifier LexicalAS); 3610 3611 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3612 DeclAccessPair FoundDecl); 3613 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3614 DeclAccessPair FoundDecl); 3615 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3616 SourceRange PlacementRange, 3617 CXXRecordDecl *NamingClass, 3618 DeclAccessPair FoundDecl, 3619 bool Diagnose = true); 3620 AccessResult CheckConstructorAccess(SourceLocation Loc, 3621 CXXConstructorDecl *D, 3622 const InitializedEntity &Entity, 3623 AccessSpecifier Access, 3624 bool IsCopyBindingRefToTemp = false); 3625 AccessResult CheckConstructorAccess(SourceLocation Loc, 3626 CXXConstructorDecl *D, 3627 AccessSpecifier Access, 3628 PartialDiagnostic PD); 3629 AccessResult CheckDestructorAccess(SourceLocation Loc, 3630 CXXDestructorDecl *Dtor, 3631 const PartialDiagnostic &PDiag); 3632 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3633 NamedDecl *D, 3634 const PartialDiagnostic &PDiag); 3635 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3636 Expr *ObjectExpr, 3637 Expr *ArgExpr, 3638 DeclAccessPair FoundDecl); 3639 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3640 DeclAccessPair FoundDecl); 3641 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3642 QualType Base, QualType Derived, 3643 const CXXBasePath &Path, 3644 unsigned DiagID, 3645 bool ForceCheck = false, 3646 bool ForceUnprivileged = false); 3647 void CheckLookupAccess(const LookupResult &R); 3648 3649 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3650 const MultiLevelTemplateArgumentList &TemplateArgs); 3651 void PerformDependentDiagnostics(const DeclContext *Pattern, 3652 const MultiLevelTemplateArgumentList &TemplateArgs); 3653 3654 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3655 3656 /// A flag to suppress access checking. 3657 bool SuppressAccessChecking; 3658 3659 /// \brief When true, access checking violations are treated as SFINAE 3660 /// failures rather than hard errors. 3661 bool AccessCheckingSFINAE; 3662 3663 void ActOnStartSuppressingAccessChecks(); 3664 void ActOnStopSuppressingAccessChecks(); 3665 3666 enum AbstractDiagSelID { 3667 AbstractNone = -1, 3668 AbstractReturnType, 3669 AbstractParamType, 3670 AbstractVariableType, 3671 AbstractFieldType, 3672 AbstractArrayType 3673 }; 3674 3675 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3676 const PartialDiagnostic &PD); 3677 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3678 3679 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3680 AbstractDiagSelID SelID = AbstractNone); 3681 3682 //===--------------------------------------------------------------------===// 3683 // C++ Overloaded Operators [C++ 13.5] 3684 // 3685 3686 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3687 3688 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3689 3690 //===--------------------------------------------------------------------===// 3691 // C++ Templates [C++ 14] 3692 // 3693 void FilterAcceptableTemplateNames(LookupResult &R); 3694 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3695 3696 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3697 QualType ObjectType, bool EnteringContext, 3698 bool &MemberOfUnknownSpecialization); 3699 3700 TemplateNameKind isTemplateName(Scope *S, 3701 CXXScopeSpec &SS, 3702 bool hasTemplateKeyword, 3703 UnqualifiedId &Name, 3704 ParsedType ObjectType, 3705 bool EnteringContext, 3706 TemplateTy &Template, 3707 bool &MemberOfUnknownSpecialization); 3708 3709 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3710 SourceLocation IILoc, 3711 Scope *S, 3712 const CXXScopeSpec *SS, 3713 TemplateTy &SuggestedTemplate, 3714 TemplateNameKind &SuggestedKind); 3715 3716 bool DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3717 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3718 3719 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3720 SourceLocation EllipsisLoc, 3721 SourceLocation KeyLoc, 3722 IdentifierInfo *ParamName, 3723 SourceLocation ParamNameLoc, 3724 unsigned Depth, unsigned Position, 3725 SourceLocation EqualLoc, 3726 ParsedType DefaultArg); 3727 3728 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3729 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3730 unsigned Depth, 3731 unsigned Position, 3732 SourceLocation EqualLoc, 3733 Expr *DefaultArg); 3734 Decl *ActOnTemplateTemplateParameter(Scope *S, 3735 SourceLocation TmpLoc, 3736 TemplateParamsTy *Params, 3737 SourceLocation EllipsisLoc, 3738 IdentifierInfo *ParamName, 3739 SourceLocation ParamNameLoc, 3740 unsigned Depth, 3741 unsigned Position, 3742 SourceLocation EqualLoc, 3743 ParsedTemplateArgument DefaultArg); 3744 3745 TemplateParamsTy * 3746 ActOnTemplateParameterList(unsigned Depth, 3747 SourceLocation ExportLoc, 3748 SourceLocation TemplateLoc, 3749 SourceLocation LAngleLoc, 3750 Decl **Params, unsigned NumParams, 3751 SourceLocation RAngleLoc); 3752 3753 /// \brief The context in which we are checking a template parameter 3754 /// list. 3755 enum TemplateParamListContext { 3756 TPC_ClassTemplate, 3757 TPC_FunctionTemplate, 3758 TPC_ClassTemplateMember, 3759 TPC_FriendFunctionTemplate, 3760 TPC_FriendFunctionTemplateDefinition, 3761 TPC_TypeAliasTemplate 3762 }; 3763 3764 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3765 TemplateParameterList *OldParams, 3766 TemplateParamListContext TPC); 3767 TemplateParameterList * 3768 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3769 SourceLocation DeclLoc, 3770 const CXXScopeSpec &SS, 3771 TemplateParameterList **ParamLists, 3772 unsigned NumParamLists, 3773 bool IsFriend, 3774 bool &IsExplicitSpecialization, 3775 bool &Invalid); 3776 3777 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3778 SourceLocation KWLoc, CXXScopeSpec &SS, 3779 IdentifierInfo *Name, SourceLocation NameLoc, 3780 AttributeList *Attr, 3781 TemplateParameterList *TemplateParams, 3782 AccessSpecifier AS, 3783 unsigned NumOuterTemplateParamLists, 3784 TemplateParameterList **OuterTemplateParamLists); 3785 3786 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3787 TemplateArgumentListInfo &Out); 3788 3789 void NoteAllFoundTemplates(TemplateName Name); 3790 3791 QualType CheckTemplateIdType(TemplateName Template, 3792 SourceLocation TemplateLoc, 3793 TemplateArgumentListInfo &TemplateArgs); 3794 3795 TypeResult 3796 ActOnTemplateIdType(CXXScopeSpec &SS, 3797 TemplateTy Template, SourceLocation TemplateLoc, 3798 SourceLocation LAngleLoc, 3799 ASTTemplateArgsPtr TemplateArgs, 3800 SourceLocation RAngleLoc); 3801 3802 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3803 /// such as \c class T::template apply<U>. 3804 /// 3805 /// \param TUK 3806 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3807 TypeSpecifierType TagSpec, 3808 SourceLocation TagLoc, 3809 CXXScopeSpec &SS, 3810 TemplateTy TemplateD, 3811 SourceLocation TemplateLoc, 3812 SourceLocation LAngleLoc, 3813 ASTTemplateArgsPtr TemplateArgsIn, 3814 SourceLocation RAngleLoc); 3815 3816 3817 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3818 LookupResult &R, 3819 bool RequiresADL, 3820 const TemplateArgumentListInfo &TemplateArgs); 3821 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3822 const DeclarationNameInfo &NameInfo, 3823 const TemplateArgumentListInfo &TemplateArgs); 3824 3825 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3826 SourceLocation TemplateKWLoc, 3827 CXXScopeSpec &SS, 3828 UnqualifiedId &Name, 3829 ParsedType ObjectType, 3830 bool EnteringContext, 3831 TemplateTy &Template); 3832 3833 DeclResult 3834 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3835 SourceLocation KWLoc, 3836 CXXScopeSpec &SS, 3837 TemplateTy Template, 3838 SourceLocation TemplateNameLoc, 3839 SourceLocation LAngleLoc, 3840 ASTTemplateArgsPtr TemplateArgs, 3841 SourceLocation RAngleLoc, 3842 AttributeList *Attr, 3843 MultiTemplateParamsArg TemplateParameterLists); 3844 3845 Decl *ActOnTemplateDeclarator(Scope *S, 3846 MultiTemplateParamsArg TemplateParameterLists, 3847 Declarator &D); 3848 3849 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3850 MultiTemplateParamsArg TemplateParameterLists, 3851 Declarator &D); 3852 3853 bool 3854 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3855 TemplateSpecializationKind NewTSK, 3856 NamedDecl *PrevDecl, 3857 TemplateSpecializationKind PrevTSK, 3858 SourceLocation PrevPtOfInstantiation, 3859 bool &SuppressNew); 3860 3861 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3862 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3863 LookupResult &Previous); 3864 3865 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 3866 TemplateArgumentListInfo *ExplicitTemplateArgs, 3867 LookupResult &Previous); 3868 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 3869 3870 DeclResult 3871 ActOnExplicitInstantiation(Scope *S, 3872 SourceLocation ExternLoc, 3873 SourceLocation TemplateLoc, 3874 unsigned TagSpec, 3875 SourceLocation KWLoc, 3876 const CXXScopeSpec &SS, 3877 TemplateTy Template, 3878 SourceLocation TemplateNameLoc, 3879 SourceLocation LAngleLoc, 3880 ASTTemplateArgsPtr TemplateArgs, 3881 SourceLocation RAngleLoc, 3882 AttributeList *Attr); 3883 3884 DeclResult 3885 ActOnExplicitInstantiation(Scope *S, 3886 SourceLocation ExternLoc, 3887 SourceLocation TemplateLoc, 3888 unsigned TagSpec, 3889 SourceLocation KWLoc, 3890 CXXScopeSpec &SS, 3891 IdentifierInfo *Name, 3892 SourceLocation NameLoc, 3893 AttributeList *Attr); 3894 3895 DeclResult ActOnExplicitInstantiation(Scope *S, 3896 SourceLocation ExternLoc, 3897 SourceLocation TemplateLoc, 3898 Declarator &D); 3899 3900 TemplateArgumentLoc 3901 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 3902 SourceLocation TemplateLoc, 3903 SourceLocation RAngleLoc, 3904 Decl *Param, 3905 SmallVectorImpl<TemplateArgument> &Converted); 3906 3907 /// \brief Specifies the context in which a particular template 3908 /// argument is being checked. 3909 enum CheckTemplateArgumentKind { 3910 /// \brief The template argument was specified in the code or was 3911 /// instantiated with some deduced template arguments. 3912 CTAK_Specified, 3913 3914 /// \brief The template argument was deduced via template argument 3915 /// deduction. 3916 CTAK_Deduced, 3917 3918 /// \brief The template argument was deduced from an array bound 3919 /// via template argument deduction. 3920 CTAK_DeducedFromArrayBound 3921 }; 3922 3923 bool CheckTemplateArgument(NamedDecl *Param, 3924 const TemplateArgumentLoc &Arg, 3925 NamedDecl *Template, 3926 SourceLocation TemplateLoc, 3927 SourceLocation RAngleLoc, 3928 unsigned ArgumentPackIndex, 3929 SmallVectorImpl<TemplateArgument> &Converted, 3930 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3931 3932 /// \brief Check that the given template arguments can be be provided to 3933 /// the given template, converting the arguments along the way. 3934 /// 3935 /// \param Template The template to which the template arguments are being 3936 /// provided. 3937 /// 3938 /// \param TemplateLoc The location of the template name in the source. 3939 /// 3940 /// \param TemplateArgs The list of template arguments. If the template is 3941 /// a template template parameter, this function may extend the set of 3942 /// template arguments to also include substituted, defaulted template 3943 /// arguments. 3944 /// 3945 /// \param PartialTemplateArgs True if the list of template arguments is 3946 /// intentionally partial, e.g., because we're checking just the initial 3947 /// set of template arguments. 3948 /// 3949 /// \param Converted Will receive the converted, canonicalized template 3950 /// arguments. 3951 /// 3952 /// \returns True if an error occurred, false otherwise. 3953 bool CheckTemplateArgumentList(TemplateDecl *Template, 3954 SourceLocation TemplateLoc, 3955 TemplateArgumentListInfo &TemplateArgs, 3956 bool PartialTemplateArgs, 3957 SmallVectorImpl<TemplateArgument> &Converted); 3958 3959 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 3960 const TemplateArgumentLoc &Arg, 3961 SmallVectorImpl<TemplateArgument> &Converted); 3962 3963 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 3964 TypeSourceInfo *Arg); 3965 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 3966 TemplateArgument &Converted); 3967 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 3968 QualType InstantiatedParamType, Expr *Arg, 3969 TemplateArgument &Converted, 3970 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3971 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 3972 const TemplateArgumentLoc &Arg); 3973 3974 ExprResult 3975 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 3976 QualType ParamType, 3977 SourceLocation Loc); 3978 ExprResult 3979 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 3980 SourceLocation Loc); 3981 3982 /// \brief Enumeration describing how template parameter lists are compared 3983 /// for equality. 3984 enum TemplateParameterListEqualKind { 3985 /// \brief We are matching the template parameter lists of two templates 3986 /// that might be redeclarations. 3987 /// 3988 /// \code 3989 /// template<typename T> struct X; 3990 /// template<typename T> struct X; 3991 /// \endcode 3992 TPL_TemplateMatch, 3993 3994 /// \brief We are matching the template parameter lists of two template 3995 /// template parameters as part of matching the template parameter lists 3996 /// of two templates that might be redeclarations. 3997 /// 3998 /// \code 3999 /// template<template<int I> class TT> struct X; 4000 /// template<template<int Value> class Other> struct X; 4001 /// \endcode 4002 TPL_TemplateTemplateParmMatch, 4003 4004 /// \brief We are matching the template parameter lists of a template 4005 /// template argument against the template parameter lists of a template 4006 /// template parameter. 4007 /// 4008 /// \code 4009 /// template<template<int Value> class Metafun> struct X; 4010 /// template<int Value> struct integer_c; 4011 /// X<integer_c> xic; 4012 /// \endcode 4013 TPL_TemplateTemplateArgumentMatch 4014 }; 4015 4016 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 4017 TemplateParameterList *Old, 4018 bool Complain, 4019 TemplateParameterListEqualKind Kind, 4020 SourceLocation TemplateArgLoc 4021 = SourceLocation()); 4022 4023 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 4024 4025 /// \brief Called when the parser has parsed a C++ typename 4026 /// specifier, e.g., "typename T::type". 4027 /// 4028 /// \param S The scope in which this typename type occurs. 4029 /// \param TypenameLoc the location of the 'typename' keyword 4030 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4031 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 4032 /// \param IdLoc the location of the identifier. 4033 TypeResult 4034 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4035 const CXXScopeSpec &SS, const IdentifierInfo &II, 4036 SourceLocation IdLoc); 4037 4038 /// \brief Called when the parser has parsed a C++ typename 4039 /// specifier that ends in a template-id, e.g., 4040 /// "typename MetaFun::template apply<T1, T2>". 4041 /// 4042 /// \param S The scope in which this typename type occurs. 4043 /// \param TypenameLoc the location of the 'typename' keyword 4044 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4045 /// \param TemplateLoc the location of the 'template' keyword, if any. 4046 /// \param TemplateName The template name. 4047 /// \param TemplateNameLoc The location of the template name. 4048 /// \param LAngleLoc The location of the opening angle bracket ('<'). 4049 /// \param TemplateArgs The template arguments. 4050 /// \param RAngleLoc The location of the closing angle bracket ('>'). 4051 TypeResult 4052 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4053 const CXXScopeSpec &SS, 4054 SourceLocation TemplateLoc, 4055 TemplateTy Template, 4056 SourceLocation TemplateNameLoc, 4057 SourceLocation LAngleLoc, 4058 ASTTemplateArgsPtr TemplateArgs, 4059 SourceLocation RAngleLoc); 4060 4061 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 4062 SourceLocation KeywordLoc, 4063 NestedNameSpecifierLoc QualifierLoc, 4064 const IdentifierInfo &II, 4065 SourceLocation IILoc); 4066 4067 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 4068 SourceLocation Loc, 4069 DeclarationName Name); 4070 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 4071 4072 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 4073 4074 std::string 4075 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4076 const TemplateArgumentList &Args); 4077 4078 std::string 4079 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4080 const TemplateArgument *Args, 4081 unsigned NumArgs); 4082 4083 //===--------------------------------------------------------------------===// 4084 // C++ Variadic Templates (C++0x [temp.variadic]) 4085 //===--------------------------------------------------------------------===// 4086 4087 /// \brief The context in which an unexpanded parameter pack is 4088 /// being diagnosed. 4089 /// 4090 /// Note that the values of this enumeration line up with the first 4091 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4092 enum UnexpandedParameterPackContext { 4093 /// \brief An arbitrary expression. 4094 UPPC_Expression = 0, 4095 4096 /// \brief The base type of a class type. 4097 UPPC_BaseType, 4098 4099 /// \brief The type of an arbitrary declaration. 4100 UPPC_DeclarationType, 4101 4102 /// \brief The type of a data member. 4103 UPPC_DataMemberType, 4104 4105 /// \brief The size of a bit-field. 4106 UPPC_BitFieldWidth, 4107 4108 /// \brief The expression in a static assertion. 4109 UPPC_StaticAssertExpression, 4110 4111 /// \brief The fixed underlying type of an enumeration. 4112 UPPC_FixedUnderlyingType, 4113 4114 /// \brief The enumerator value. 4115 UPPC_EnumeratorValue, 4116 4117 /// \brief A using declaration. 4118 UPPC_UsingDeclaration, 4119 4120 /// \brief A friend declaration. 4121 UPPC_FriendDeclaration, 4122 4123 /// \brief A declaration qualifier. 4124 UPPC_DeclarationQualifier, 4125 4126 /// \brief An initializer. 4127 UPPC_Initializer, 4128 4129 /// \brief A default argument. 4130 UPPC_DefaultArgument, 4131 4132 /// \brief The type of a non-type template parameter. 4133 UPPC_NonTypeTemplateParameterType, 4134 4135 /// \brief The type of an exception. 4136 UPPC_ExceptionType, 4137 4138 /// \brief Partial specialization. 4139 UPPC_PartialSpecialization 4140 }; 4141 4142 /// \brief If the given type contains an unexpanded parameter pack, 4143 /// diagnose the error. 4144 /// 4145 /// \param Loc The source location where a diagnostc should be emitted. 4146 /// 4147 /// \param T The type that is being checked for unexpanded parameter 4148 /// packs. 4149 /// 4150 /// \returns true if an error occurred, false otherwise. 4151 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4152 UnexpandedParameterPackContext UPPC); 4153 4154 /// \brief If the given expression contains an unexpanded parameter 4155 /// pack, diagnose the error. 4156 /// 4157 /// \param E The expression that is being checked for unexpanded 4158 /// parameter packs. 4159 /// 4160 /// \returns true if an error occurred, false otherwise. 4161 bool DiagnoseUnexpandedParameterPack(Expr *E, 4162 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4163 4164 /// \brief If the given nested-name-specifier contains an unexpanded 4165 /// parameter pack, diagnose the error. 4166 /// 4167 /// \param SS The nested-name-specifier that is being checked for 4168 /// unexpanded parameter packs. 4169 /// 4170 /// \returns true if an error occurred, false otherwise. 4171 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4172 UnexpandedParameterPackContext UPPC); 4173 4174 /// \brief If the given name contains an unexpanded parameter pack, 4175 /// diagnose the error. 4176 /// 4177 /// \param NameInfo The name (with source location information) that 4178 /// is being checked for unexpanded parameter packs. 4179 /// 4180 /// \returns true if an error occurred, false otherwise. 4181 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4182 UnexpandedParameterPackContext UPPC); 4183 4184 /// \brief If the given template name contains an unexpanded parameter pack, 4185 /// diagnose the error. 4186 /// 4187 /// \param Loc The location of the template name. 4188 /// 4189 /// \param Template The template name that is being checked for unexpanded 4190 /// parameter packs. 4191 /// 4192 /// \returns true if an error occurred, false otherwise. 4193 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4194 TemplateName Template, 4195 UnexpandedParameterPackContext UPPC); 4196 4197 /// \brief If the given template argument contains an unexpanded parameter 4198 /// pack, diagnose the error. 4199 /// 4200 /// \param Arg The template argument that is being checked for unexpanded 4201 /// parameter packs. 4202 /// 4203 /// \returns true if an error occurred, false otherwise. 4204 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4205 UnexpandedParameterPackContext UPPC); 4206 4207 /// \brief Collect the set of unexpanded parameter packs within the given 4208 /// template argument. 4209 /// 4210 /// \param Arg The template argument that will be traversed to find 4211 /// unexpanded parameter packs. 4212 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4213 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4214 4215 /// \brief Collect the set of unexpanded parameter packs within the given 4216 /// template argument. 4217 /// 4218 /// \param Arg The template argument that will be traversed to find 4219 /// unexpanded parameter packs. 4220 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4221 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4222 4223 /// \brief Collect the set of unexpanded parameter packs within the given 4224 /// type. 4225 /// 4226 /// \param T The type that will be traversed to find 4227 /// unexpanded parameter packs. 4228 void collectUnexpandedParameterPacks(QualType T, 4229 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4230 4231 /// \brief Collect the set of unexpanded parameter packs within the given 4232 /// type. 4233 /// 4234 /// \param TL The type that will be traversed to find 4235 /// unexpanded parameter packs. 4236 void collectUnexpandedParameterPacks(TypeLoc TL, 4237 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4238 4239 /// \brief Invoked when parsing a template argument followed by an 4240 /// ellipsis, which creates a pack expansion. 4241 /// 4242 /// \param Arg The template argument preceding the ellipsis, which 4243 /// may already be invalid. 4244 /// 4245 /// \param EllipsisLoc The location of the ellipsis. 4246 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4247 SourceLocation EllipsisLoc); 4248 4249 /// \brief Invoked when parsing a type followed by an ellipsis, which 4250 /// creates a pack expansion. 4251 /// 4252 /// \param Type The type preceding the ellipsis, which will become 4253 /// the pattern of the pack expansion. 4254 /// 4255 /// \param EllipsisLoc The location of the ellipsis. 4256 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4257 4258 /// \brief Construct a pack expansion type from the pattern of the pack 4259 /// expansion. 4260 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4261 SourceLocation EllipsisLoc, 4262 llvm::Optional<unsigned> NumExpansions); 4263 4264 /// \brief Construct a pack expansion type from the pattern of the pack 4265 /// expansion. 4266 QualType CheckPackExpansion(QualType Pattern, 4267 SourceRange PatternRange, 4268 SourceLocation EllipsisLoc, 4269 llvm::Optional<unsigned> NumExpansions); 4270 4271 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4272 /// creates a pack expansion. 4273 /// 4274 /// \param Pattern The expression preceding the ellipsis, which will become 4275 /// the pattern of the pack expansion. 4276 /// 4277 /// \param EllipsisLoc The location of the ellipsis. 4278 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4279 4280 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4281 /// creates a pack expansion. 4282 /// 4283 /// \param Pattern The expression preceding the ellipsis, which will become 4284 /// the pattern of the pack expansion. 4285 /// 4286 /// \param EllipsisLoc The location of the ellipsis. 4287 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4288 llvm::Optional<unsigned> NumExpansions); 4289 4290 /// \brief Determine whether we could expand a pack expansion with the 4291 /// given set of parameter packs into separate arguments by repeatedly 4292 /// transforming the pattern. 4293 /// 4294 /// \param EllipsisLoc The location of the ellipsis that identifies the 4295 /// pack expansion. 4296 /// 4297 /// \param PatternRange The source range that covers the entire pattern of 4298 /// the pack expansion. 4299 /// 4300 /// \param Unexpanded The set of unexpanded parameter packs within the 4301 /// pattern. 4302 /// 4303 /// \param NumUnexpanded The number of unexpanded parameter packs in 4304 /// \p Unexpanded. 4305 /// 4306 /// \param ShouldExpand Will be set to \c true if the transformer should 4307 /// expand the corresponding pack expansions into separate arguments. When 4308 /// set, \c NumExpansions must also be set. 4309 /// 4310 /// \param RetainExpansion Whether the caller should add an unexpanded 4311 /// pack expansion after all of the expanded arguments. This is used 4312 /// when extending explicitly-specified template argument packs per 4313 /// C++0x [temp.arg.explicit]p9. 4314 /// 4315 /// \param NumExpansions The number of separate arguments that will be in 4316 /// the expanded form of the corresponding pack expansion. This is both an 4317 /// input and an output parameter, which can be set by the caller if the 4318 /// number of expansions is known a priori (e.g., due to a prior substitution) 4319 /// and will be set by the callee when the number of expansions is known. 4320 /// The callee must set this value when \c ShouldExpand is \c true; it may 4321 /// set this value in other cases. 4322 /// 4323 /// \returns true if an error occurred (e.g., because the parameter packs 4324 /// are to be instantiated with arguments of different lengths), false 4325 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4326 /// must be set. 4327 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4328 SourceRange PatternRange, 4329 const UnexpandedParameterPack *Unexpanded, 4330 unsigned NumUnexpanded, 4331 const MultiLevelTemplateArgumentList &TemplateArgs, 4332 bool &ShouldExpand, 4333 bool &RetainExpansion, 4334 llvm::Optional<unsigned> &NumExpansions); 4335 4336 /// \brief Determine the number of arguments in the given pack expansion 4337 /// type. 4338 /// 4339 /// This routine already assumes that the pack expansion type can be 4340 /// expanded and that the number of arguments in the expansion is 4341 /// consistent across all of the unexpanded parameter packs in its pattern. 4342 unsigned getNumArgumentsInExpansion(QualType T, 4343 const MultiLevelTemplateArgumentList &TemplateArgs); 4344 4345 /// \brief Determine whether the given declarator contains any unexpanded 4346 /// parameter packs. 4347 /// 4348 /// This routine is used by the parser to disambiguate function declarators 4349 /// with an ellipsis prior to the ')', e.g., 4350 /// 4351 /// \code 4352 /// void f(T...); 4353 /// \endcode 4354 /// 4355 /// To determine whether we have an (unnamed) function parameter pack or 4356 /// a variadic function. 4357 /// 4358 /// \returns true if the declarator contains any unexpanded parameter packs, 4359 /// false otherwise. 4360 bool containsUnexpandedParameterPacks(Declarator &D); 4361 4362 //===--------------------------------------------------------------------===// 4363 // C++ Template Argument Deduction (C++ [temp.deduct]) 4364 //===--------------------------------------------------------------------===// 4365 4366 /// \brief Describes the result of template argument deduction. 4367 /// 4368 /// The TemplateDeductionResult enumeration describes the result of 4369 /// template argument deduction, as returned from 4370 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4371 /// structure provides additional information about the results of 4372 /// template argument deduction, e.g., the deduced template argument 4373 /// list (if successful) or the specific template parameters or 4374 /// deduced arguments that were involved in the failure. 4375 enum TemplateDeductionResult { 4376 /// \brief Template argument deduction was successful. 4377 TDK_Success = 0, 4378 /// \brief Template argument deduction exceeded the maximum template 4379 /// instantiation depth (which has already been diagnosed). 4380 TDK_InstantiationDepth, 4381 /// \brief Template argument deduction did not deduce a value 4382 /// for every template parameter. 4383 TDK_Incomplete, 4384 /// \brief Template argument deduction produced inconsistent 4385 /// deduced values for the given template parameter. 4386 TDK_Inconsistent, 4387 /// \brief Template argument deduction failed due to inconsistent 4388 /// cv-qualifiers on a template parameter type that would 4389 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4390 /// but were given a non-const "X". 4391 TDK_Underqualified, 4392 /// \brief Substitution of the deduced template argument values 4393 /// resulted in an error. 4394 TDK_SubstitutionFailure, 4395 /// \brief Substitution of the deduced template argument values 4396 /// into a non-deduced context produced a type or value that 4397 /// produces a type that does not match the original template 4398 /// arguments provided. 4399 TDK_NonDeducedMismatch, 4400 /// \brief When performing template argument deduction for a function 4401 /// template, there were too many call arguments. 4402 TDK_TooManyArguments, 4403 /// \brief When performing template argument deduction for a function 4404 /// template, there were too few call arguments. 4405 TDK_TooFewArguments, 4406 /// \brief The explicitly-specified template arguments were not valid 4407 /// template arguments for the given template. 4408 TDK_InvalidExplicitArguments, 4409 /// \brief The arguments included an overloaded function name that could 4410 /// not be resolved to a suitable function. 4411 TDK_FailedOverloadResolution 4412 }; 4413 4414 TemplateDeductionResult 4415 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4416 const TemplateArgumentList &TemplateArgs, 4417 sema::TemplateDeductionInfo &Info); 4418 4419 TemplateDeductionResult 4420 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4421 TemplateArgumentListInfo &ExplicitTemplateArgs, 4422 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4423 SmallVectorImpl<QualType> &ParamTypes, 4424 QualType *FunctionType, 4425 sema::TemplateDeductionInfo &Info); 4426 4427 /// brief A function argument from which we performed template argument 4428 // deduction for a call. 4429 struct OriginalCallArg { 4430 OriginalCallArg(QualType OriginalParamType, 4431 unsigned ArgIdx, 4432 QualType OriginalArgType) 4433 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4434 OriginalArgType(OriginalArgType) { } 4435 4436 QualType OriginalParamType; 4437 unsigned ArgIdx; 4438 QualType OriginalArgType; 4439 }; 4440 4441 TemplateDeductionResult 4442 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4443 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4444 unsigned NumExplicitlySpecified, 4445 FunctionDecl *&Specialization, 4446 sema::TemplateDeductionInfo &Info, 4447 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4448 4449 TemplateDeductionResult 4450 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4451 TemplateArgumentListInfo *ExplicitTemplateArgs, 4452 Expr **Args, unsigned NumArgs, 4453 FunctionDecl *&Specialization, 4454 sema::TemplateDeductionInfo &Info); 4455 4456 TemplateDeductionResult 4457 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4458 TemplateArgumentListInfo *ExplicitTemplateArgs, 4459 QualType ArgFunctionType, 4460 FunctionDecl *&Specialization, 4461 sema::TemplateDeductionInfo &Info); 4462 4463 TemplateDeductionResult 4464 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4465 QualType ToType, 4466 CXXConversionDecl *&Specialization, 4467 sema::TemplateDeductionInfo &Info); 4468 4469 TemplateDeductionResult 4470 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4471 TemplateArgumentListInfo *ExplicitTemplateArgs, 4472 FunctionDecl *&Specialization, 4473 sema::TemplateDeductionInfo &Info); 4474 4475 bool DeduceAutoType(TypeSourceInfo *AutoType, Expr *Initializer, 4476 TypeSourceInfo *&Result); 4477 4478 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4479 FunctionTemplateDecl *FT2, 4480 SourceLocation Loc, 4481 TemplatePartialOrderingContext TPOC, 4482 unsigned NumCallArguments); 4483 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4484 UnresolvedSetIterator SEnd, 4485 TemplatePartialOrderingContext TPOC, 4486 unsigned NumCallArguments, 4487 SourceLocation Loc, 4488 const PartialDiagnostic &NoneDiag, 4489 const PartialDiagnostic &AmbigDiag, 4490 const PartialDiagnostic &CandidateDiag, 4491 bool Complain = true); 4492 4493 ClassTemplatePartialSpecializationDecl * 4494 getMoreSpecializedPartialSpecialization( 4495 ClassTemplatePartialSpecializationDecl *PS1, 4496 ClassTemplatePartialSpecializationDecl *PS2, 4497 SourceLocation Loc); 4498 4499 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4500 bool OnlyDeduced, 4501 unsigned Depth, 4502 SmallVectorImpl<bool> &Used); 4503 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4504 SmallVectorImpl<bool> &Deduced); 4505 4506 //===--------------------------------------------------------------------===// 4507 // C++ Template Instantiation 4508 // 4509 4510 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4511 const TemplateArgumentList *Innermost = 0, 4512 bool RelativeToPrimary = false, 4513 const FunctionDecl *Pattern = 0); 4514 4515 /// \brief A template instantiation that is currently in progress. 4516 struct ActiveTemplateInstantiation { 4517 /// \brief The kind of template instantiation we are performing 4518 enum InstantiationKind { 4519 /// We are instantiating a template declaration. The entity is 4520 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4521 TemplateInstantiation, 4522 4523 /// We are instantiating a default argument for a template 4524 /// parameter. The Entity is the template, and 4525 /// TemplateArgs/NumTemplateArguments provides the template 4526 /// arguments as specified. 4527 /// FIXME: Use a TemplateArgumentList 4528 DefaultTemplateArgumentInstantiation, 4529 4530 /// We are instantiating a default argument for a function. 4531 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4532 /// provides the template arguments as specified. 4533 DefaultFunctionArgumentInstantiation, 4534 4535 /// We are substituting explicit template arguments provided for 4536 /// a function template. The entity is a FunctionTemplateDecl. 4537 ExplicitTemplateArgumentSubstitution, 4538 4539 /// We are substituting template argument determined as part of 4540 /// template argument deduction for either a class template 4541 /// partial specialization or a function template. The 4542 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4543 /// a FunctionTemplateDecl. 4544 DeducedTemplateArgumentSubstitution, 4545 4546 /// We are substituting prior template arguments into a new 4547 /// template parameter. The template parameter itself is either a 4548 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4549 PriorTemplateArgumentSubstitution, 4550 4551 /// We are checking the validity of a default template argument that 4552 /// has been used when naming a template-id. 4553 DefaultTemplateArgumentChecking 4554 } Kind; 4555 4556 /// \brief The point of instantiation within the source code. 4557 SourceLocation PointOfInstantiation; 4558 4559 /// \brief The template (or partial specialization) in which we are 4560 /// performing the instantiation, for substitutions of prior template 4561 /// arguments. 4562 NamedDecl *Template; 4563 4564 /// \brief The entity that is being instantiated. 4565 uintptr_t Entity; 4566 4567 /// \brief The list of template arguments we are substituting, if they 4568 /// are not part of the entity. 4569 const TemplateArgument *TemplateArgs; 4570 4571 /// \brief The number of template arguments in TemplateArgs. 4572 unsigned NumTemplateArgs; 4573 4574 /// \brief The template deduction info object associated with the 4575 /// substitution or checking of explicit or deduced template arguments. 4576 sema::TemplateDeductionInfo *DeductionInfo; 4577 4578 /// \brief The source range that covers the construct that cause 4579 /// the instantiation, e.g., the template-id that causes a class 4580 /// template instantiation. 4581 SourceRange InstantiationRange; 4582 4583 ActiveTemplateInstantiation() 4584 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4585 NumTemplateArgs(0), DeductionInfo(0) {} 4586 4587 /// \brief Determines whether this template is an actual instantiation 4588 /// that should be counted toward the maximum instantiation depth. 4589 bool isInstantiationRecord() const; 4590 4591 friend bool operator==(const ActiveTemplateInstantiation &X, 4592 const ActiveTemplateInstantiation &Y) { 4593 if (X.Kind != Y.Kind) 4594 return false; 4595 4596 if (X.Entity != Y.Entity) 4597 return false; 4598 4599 switch (X.Kind) { 4600 case TemplateInstantiation: 4601 return true; 4602 4603 case PriorTemplateArgumentSubstitution: 4604 case DefaultTemplateArgumentChecking: 4605 if (X.Template != Y.Template) 4606 return false; 4607 4608 // Fall through 4609 4610 case DefaultTemplateArgumentInstantiation: 4611 case ExplicitTemplateArgumentSubstitution: 4612 case DeducedTemplateArgumentSubstitution: 4613 case DefaultFunctionArgumentInstantiation: 4614 return X.TemplateArgs == Y.TemplateArgs; 4615 4616 } 4617 4618 return true; 4619 } 4620 4621 friend bool operator!=(const ActiveTemplateInstantiation &X, 4622 const ActiveTemplateInstantiation &Y) { 4623 return !(X == Y); 4624 } 4625 }; 4626 4627 /// \brief List of active template instantiations. 4628 /// 4629 /// This vector is treated as a stack. As one template instantiation 4630 /// requires another template instantiation, additional 4631 /// instantiations are pushed onto the stack up to a 4632 /// user-configurable limit LangOptions::InstantiationDepth. 4633 SmallVector<ActiveTemplateInstantiation, 16> 4634 ActiveTemplateInstantiations; 4635 4636 /// \brief Whether we are in a SFINAE context that is not associated with 4637 /// template instantiation. 4638 /// 4639 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4640 /// of a template instantiation or template argument deduction. 4641 bool InNonInstantiationSFINAEContext; 4642 4643 /// \brief The number of ActiveTemplateInstantiation entries in 4644 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4645 /// therefore, should not be counted as part of the instantiation depth. 4646 unsigned NonInstantiationEntries; 4647 4648 /// \brief The last template from which a template instantiation 4649 /// error or warning was produced. 4650 /// 4651 /// This value is used to suppress printing of redundant template 4652 /// instantiation backtraces when there are multiple errors in the 4653 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4654 /// to implement it anywhere else. 4655 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4656 4657 /// \brief The current index into pack expansion arguments that will be 4658 /// used for substitution of parameter packs. 4659 /// 4660 /// The pack expansion index will be -1 to indicate that parameter packs 4661 /// should be instantiated as themselves. Otherwise, the index specifies 4662 /// which argument within the parameter pack will be used for substitution. 4663 int ArgumentPackSubstitutionIndex; 4664 4665 /// \brief RAII object used to change the argument pack substitution index 4666 /// within a \c Sema object. 4667 /// 4668 /// See \c ArgumentPackSubstitutionIndex for more information. 4669 class ArgumentPackSubstitutionIndexRAII { 4670 Sema &Self; 4671 int OldSubstitutionIndex; 4672 4673 public: 4674 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4675 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4676 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4677 } 4678 4679 ~ArgumentPackSubstitutionIndexRAII() { 4680 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4681 } 4682 }; 4683 4684 friend class ArgumentPackSubstitutionRAII; 4685 4686 /// \brief The stack of calls expression undergoing template instantiation. 4687 /// 4688 /// The top of this stack is used by a fixit instantiating unresolved 4689 /// function calls to fix the AST to match the textual change it prints. 4690 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4691 4692 /// \brief For each declaration that involved template argument deduction, the 4693 /// set of diagnostics that were suppressed during that template argument 4694 /// deduction. 4695 /// 4696 /// FIXME: Serialize this structure to the AST file. 4697 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 4698 SuppressedDiagnostics; 4699 4700 /// \brief A stack object to be created when performing template 4701 /// instantiation. 4702 /// 4703 /// Construction of an object of type \c InstantiatingTemplate 4704 /// pushes the current instantiation onto the stack of active 4705 /// instantiations. If the size of this stack exceeds the maximum 4706 /// number of recursive template instantiations, construction 4707 /// produces an error and evaluates true. 4708 /// 4709 /// Destruction of this object will pop the named instantiation off 4710 /// the stack. 4711 struct InstantiatingTemplate { 4712 /// \brief Note that we are instantiating a class template, 4713 /// function template, or a member thereof. 4714 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4715 Decl *Entity, 4716 SourceRange InstantiationRange = SourceRange()); 4717 4718 /// \brief Note that we are instantiating a default argument in a 4719 /// template-id. 4720 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4721 TemplateDecl *Template, 4722 const TemplateArgument *TemplateArgs, 4723 unsigned NumTemplateArgs, 4724 SourceRange InstantiationRange = SourceRange()); 4725 4726 /// \brief Note that we are instantiating a default argument in a 4727 /// template-id. 4728 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4729 FunctionTemplateDecl *FunctionTemplate, 4730 const TemplateArgument *TemplateArgs, 4731 unsigned NumTemplateArgs, 4732 ActiveTemplateInstantiation::InstantiationKind Kind, 4733 sema::TemplateDeductionInfo &DeductionInfo, 4734 SourceRange InstantiationRange = SourceRange()); 4735 4736 /// \brief Note that we are instantiating as part of template 4737 /// argument deduction for a class template partial 4738 /// specialization. 4739 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4740 ClassTemplatePartialSpecializationDecl *PartialSpec, 4741 const TemplateArgument *TemplateArgs, 4742 unsigned NumTemplateArgs, 4743 sema::TemplateDeductionInfo &DeductionInfo, 4744 SourceRange InstantiationRange = SourceRange()); 4745 4746 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4747 ParmVarDecl *Param, 4748 const TemplateArgument *TemplateArgs, 4749 unsigned NumTemplateArgs, 4750 SourceRange InstantiationRange = SourceRange()); 4751 4752 /// \brief Note that we are substituting prior template arguments into a 4753 /// non-type or template template parameter. 4754 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4755 NamedDecl *Template, 4756 NonTypeTemplateParmDecl *Param, 4757 const TemplateArgument *TemplateArgs, 4758 unsigned NumTemplateArgs, 4759 SourceRange InstantiationRange); 4760 4761 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4762 NamedDecl *Template, 4763 TemplateTemplateParmDecl *Param, 4764 const TemplateArgument *TemplateArgs, 4765 unsigned NumTemplateArgs, 4766 SourceRange InstantiationRange); 4767 4768 /// \brief Note that we are checking the default template argument 4769 /// against the template parameter for a given template-id. 4770 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4771 TemplateDecl *Template, 4772 NamedDecl *Param, 4773 const TemplateArgument *TemplateArgs, 4774 unsigned NumTemplateArgs, 4775 SourceRange InstantiationRange); 4776 4777 4778 /// \brief Note that we have finished instantiating this template. 4779 void Clear(); 4780 4781 ~InstantiatingTemplate() { Clear(); } 4782 4783 /// \brief Determines whether we have exceeded the maximum 4784 /// recursive template instantiations. 4785 operator bool() const { return Invalid; } 4786 4787 private: 4788 Sema &SemaRef; 4789 bool Invalid; 4790 bool SavedInNonInstantiationSFINAEContext; 4791 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4792 SourceRange InstantiationRange); 4793 4794 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4795 4796 InstantiatingTemplate& 4797 operator=(const InstantiatingTemplate&); // not implemented 4798 }; 4799 4800 void PrintInstantiationStack(); 4801 4802 /// \brief Determines whether we are currently in a context where 4803 /// template argument substitution failures are not considered 4804 /// errors. 4805 /// 4806 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4807 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4808 /// template-deduction context object, which can be used to capture 4809 /// diagnostics that will be suppressed. 4810 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4811 4812 /// \brief RAII class used to determine whether SFINAE has 4813 /// trapped any errors that occur during template argument 4814 /// deduction.` 4815 class SFINAETrap { 4816 Sema &SemaRef; 4817 unsigned PrevSFINAEErrors; 4818 bool PrevInNonInstantiationSFINAEContext; 4819 bool PrevAccessCheckingSFINAE; 4820 4821 public: 4822 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 4823 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 4824 PrevInNonInstantiationSFINAEContext( 4825 SemaRef.InNonInstantiationSFINAEContext), 4826 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 4827 { 4828 if (!SemaRef.isSFINAEContext()) 4829 SemaRef.InNonInstantiationSFINAEContext = true; 4830 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 4831 } 4832 4833 ~SFINAETrap() { 4834 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 4835 SemaRef.InNonInstantiationSFINAEContext 4836 = PrevInNonInstantiationSFINAEContext; 4837 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 4838 } 4839 4840 /// \brief Determine whether any SFINAE errors have been trapped. 4841 bool hasErrorOccurred() const { 4842 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 4843 } 4844 }; 4845 4846 /// \brief The current instantiation scope used to store local 4847 /// variables. 4848 LocalInstantiationScope *CurrentInstantiationScope; 4849 4850 /// \brief The number of typos corrected by CorrectTypo. 4851 unsigned TyposCorrected; 4852 4853 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 4854 UnqualifiedTyposCorrectedMap; 4855 4856 /// \brief A cache containing the results of typo correction for unqualified 4857 /// name lookup. 4858 /// 4859 /// The string is the string that we corrected to (which may be empty, if 4860 /// there was no correction), while the boolean will be true when the 4861 /// string represents a keyword. 4862 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 4863 4864 /// \brief Worker object for performing CFG-based warnings. 4865 sema::AnalysisBasedWarnings AnalysisWarnings; 4866 4867 /// \brief An entity for which implicit template instantiation is required. 4868 /// 4869 /// The source location associated with the declaration is the first place in 4870 /// the source code where the declaration was "used". It is not necessarily 4871 /// the point of instantiation (which will be either before or after the 4872 /// namespace-scope declaration that triggered this implicit instantiation), 4873 /// However, it is the location that diagnostics should generally refer to, 4874 /// because users will need to know what code triggered the instantiation. 4875 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 4876 4877 /// \brief The queue of implicit template instantiations that are required 4878 /// but have not yet been performed. 4879 std::deque<PendingImplicitInstantiation> PendingInstantiations; 4880 4881 /// \brief The queue of implicit template instantiations that are required 4882 /// and must be performed within the current local scope. 4883 /// 4884 /// This queue is only used for member functions of local classes in 4885 /// templates, which must be instantiated in the same scope as their 4886 /// enclosing function, so that they can reference function-local 4887 /// types, static variables, enumerators, etc. 4888 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 4889 4890 void PerformPendingInstantiations(bool LocalOnly = false); 4891 4892 TypeSourceInfo *SubstType(TypeSourceInfo *T, 4893 const MultiLevelTemplateArgumentList &TemplateArgs, 4894 SourceLocation Loc, DeclarationName Entity); 4895 4896 QualType SubstType(QualType T, 4897 const MultiLevelTemplateArgumentList &TemplateArgs, 4898 SourceLocation Loc, DeclarationName Entity); 4899 4900 TypeSourceInfo *SubstType(TypeLoc TL, 4901 const MultiLevelTemplateArgumentList &TemplateArgs, 4902 SourceLocation Loc, DeclarationName Entity); 4903 4904 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 4905 const MultiLevelTemplateArgumentList &TemplateArgs, 4906 SourceLocation Loc, 4907 DeclarationName Entity); 4908 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 4909 const MultiLevelTemplateArgumentList &TemplateArgs, 4910 int indexAdjustment, 4911 llvm::Optional<unsigned> NumExpansions); 4912 bool SubstParmTypes(SourceLocation Loc, 4913 ParmVarDecl **Params, unsigned NumParams, 4914 const MultiLevelTemplateArgumentList &TemplateArgs, 4915 SmallVectorImpl<QualType> &ParamTypes, 4916 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 4917 ExprResult SubstExpr(Expr *E, 4918 const MultiLevelTemplateArgumentList &TemplateArgs); 4919 4920 /// \brief Substitute the given template arguments into a list of 4921 /// expressions, expanding pack expansions if required. 4922 /// 4923 /// \param Exprs The list of expressions to substitute into. 4924 /// 4925 /// \param NumExprs The number of expressions in \p Exprs. 4926 /// 4927 /// \param IsCall Whether this is some form of call, in which case 4928 /// default arguments will be dropped. 4929 /// 4930 /// \param TemplateArgs The set of template arguments to substitute. 4931 /// 4932 /// \param Outputs Will receive all of the substituted arguments. 4933 /// 4934 /// \returns true if an error occurred, false otherwise. 4935 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 4936 const MultiLevelTemplateArgumentList &TemplateArgs, 4937 SmallVectorImpl<Expr *> &Outputs); 4938 4939 StmtResult SubstStmt(Stmt *S, 4940 const MultiLevelTemplateArgumentList &TemplateArgs); 4941 4942 Decl *SubstDecl(Decl *D, DeclContext *Owner, 4943 const MultiLevelTemplateArgumentList &TemplateArgs); 4944 4945 bool 4946 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 4947 CXXRecordDecl *Pattern, 4948 const MultiLevelTemplateArgumentList &TemplateArgs); 4949 4950 bool 4951 InstantiateClass(SourceLocation PointOfInstantiation, 4952 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 4953 const MultiLevelTemplateArgumentList &TemplateArgs, 4954 TemplateSpecializationKind TSK, 4955 bool Complain = true); 4956 4957 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 4958 const Decl *Pattern, Decl *Inst); 4959 4960 bool 4961 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 4962 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4963 TemplateSpecializationKind TSK, 4964 bool Complain = true); 4965 4966 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 4967 CXXRecordDecl *Instantiation, 4968 const MultiLevelTemplateArgumentList &TemplateArgs, 4969 TemplateSpecializationKind TSK); 4970 4971 void InstantiateClassTemplateSpecializationMembers( 4972 SourceLocation PointOfInstantiation, 4973 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4974 TemplateSpecializationKind TSK); 4975 4976 NestedNameSpecifierLoc 4977 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 4978 const MultiLevelTemplateArgumentList &TemplateArgs); 4979 4980 DeclarationNameInfo 4981 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 4982 const MultiLevelTemplateArgumentList &TemplateArgs); 4983 TemplateName 4984 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 4985 SourceLocation Loc, 4986 const MultiLevelTemplateArgumentList &TemplateArgs); 4987 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 4988 TemplateArgumentListInfo &Result, 4989 const MultiLevelTemplateArgumentList &TemplateArgs); 4990 4991 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 4992 FunctionDecl *Function, 4993 bool Recursive = false, 4994 bool DefinitionRequired = false); 4995 void InstantiateStaticDataMemberDefinition( 4996 SourceLocation PointOfInstantiation, 4997 VarDecl *Var, 4998 bool Recursive = false, 4999 bool DefinitionRequired = false); 5000 5001 void InstantiateMemInitializers(CXXConstructorDecl *New, 5002 const CXXConstructorDecl *Tmpl, 5003 const MultiLevelTemplateArgumentList &TemplateArgs); 5004 bool InstantiateInitializer(Expr *Init, 5005 const MultiLevelTemplateArgumentList &TemplateArgs, 5006 SourceLocation &LParenLoc, 5007 ASTOwningVector<Expr*> &NewArgs, 5008 SourceLocation &RParenLoc); 5009 5010 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 5011 const MultiLevelTemplateArgumentList &TemplateArgs); 5012 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 5013 const MultiLevelTemplateArgumentList &TemplateArgs); 5014 5015 // Objective-C declarations. 5016 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 5017 IdentifierInfo *ClassName, 5018 SourceLocation ClassLoc, 5019 IdentifierInfo *SuperName, 5020 SourceLocation SuperLoc, 5021 Decl * const *ProtoRefs, 5022 unsigned NumProtoRefs, 5023 const SourceLocation *ProtoLocs, 5024 SourceLocation EndProtoLoc, 5025 AttributeList *AttrList); 5026 5027 Decl *ActOnCompatiblityAlias( 5028 SourceLocation AtCompatibilityAliasLoc, 5029 IdentifierInfo *AliasName, SourceLocation AliasLocation, 5030 IdentifierInfo *ClassName, SourceLocation ClassLocation); 5031 5032 bool CheckForwardProtocolDeclarationForCircularDependency( 5033 IdentifierInfo *PName, 5034 SourceLocation &PLoc, SourceLocation PrevLoc, 5035 const ObjCList<ObjCProtocolDecl> &PList); 5036 5037 Decl *ActOnStartProtocolInterface( 5038 SourceLocation AtProtoInterfaceLoc, 5039 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 5040 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 5041 const SourceLocation *ProtoLocs, 5042 SourceLocation EndProtoLoc, 5043 AttributeList *AttrList); 5044 5045 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 5046 IdentifierInfo *ClassName, 5047 SourceLocation ClassLoc, 5048 IdentifierInfo *CategoryName, 5049 SourceLocation CategoryLoc, 5050 Decl * const *ProtoRefs, 5051 unsigned NumProtoRefs, 5052 const SourceLocation *ProtoLocs, 5053 SourceLocation EndProtoLoc); 5054 5055 Decl *ActOnStartClassImplementation( 5056 SourceLocation AtClassImplLoc, 5057 IdentifierInfo *ClassName, SourceLocation ClassLoc, 5058 IdentifierInfo *SuperClassname, 5059 SourceLocation SuperClassLoc); 5060 5061 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 5062 IdentifierInfo *ClassName, 5063 SourceLocation ClassLoc, 5064 IdentifierInfo *CatName, 5065 SourceLocation CatLoc); 5066 5067 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc, 5068 IdentifierInfo **IdentList, 5069 SourceLocation *IdentLocs, 5070 unsigned NumElts); 5071 5072 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 5073 const IdentifierLocPair *IdentList, 5074 unsigned NumElts, 5075 AttributeList *attrList); 5076 5077 void FindProtocolDeclaration(bool WarnOnDeclarations, 5078 const IdentifierLocPair *ProtocolId, 5079 unsigned NumProtocols, 5080 SmallVectorImpl<Decl *> &Protocols); 5081 5082 /// Ensure attributes are consistent with type. 5083 /// \param [in, out] Attributes The attributes to check; they will 5084 /// be modified to be consistent with \arg PropertyTy. 5085 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5086 SourceLocation Loc, 5087 unsigned &Attributes); 5088 5089 /// Process the specified property declaration and create decls for the 5090 /// setters and getters as needed. 5091 /// \param property The property declaration being processed 5092 /// \param DC The semantic container for the property 5093 /// \param redeclaredProperty Declaration for property if redeclared 5094 /// in class extension. 5095 /// \param lexicalDC Container for redeclaredProperty. 5096 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5097 ObjCContainerDecl *DC, 5098 ObjCPropertyDecl *redeclaredProperty = 0, 5099 ObjCContainerDecl *lexicalDC = 0); 5100 5101 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5102 ObjCPropertyDecl *SuperProperty, 5103 const IdentifierInfo *Name); 5104 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5105 5106 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5107 ObjCMethodDecl *MethodDecl, 5108 bool IsInstance); 5109 5110 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5111 5112 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5113 ObjCInterfaceDecl *ID); 5114 5115 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5116 ObjCProtocolDecl *PDecl); 5117 5118 void ActOnAtEnd(Scope *S, SourceRange AtEnd, 5119 Decl **allMethods = 0, unsigned allNum = 0, 5120 Decl **allProperties = 0, unsigned pNum = 0, 5121 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5122 5123 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5124 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5125 Selector GetterSel, Selector SetterSel, 5126 bool *OverridingProperty, 5127 tok::ObjCKeywordKind MethodImplKind, 5128 DeclContext *lexicalDC = 0); 5129 5130 Decl *ActOnPropertyImplDecl(Scope *S, 5131 SourceLocation AtLoc, 5132 SourceLocation PropertyLoc, 5133 bool ImplKind, 5134 IdentifierInfo *PropertyId, 5135 IdentifierInfo *PropertyIvar, 5136 SourceLocation PropertyIvarLoc); 5137 5138 enum ObjCSpecialMethodKind { 5139 OSMK_None, 5140 OSMK_Alloc, 5141 OSMK_New, 5142 OSMK_Copy, 5143 OSMK_RetainingInit, 5144 OSMK_NonRetainingInit 5145 }; 5146 5147 struct ObjCArgInfo { 5148 IdentifierInfo *Name; 5149 SourceLocation NameLoc; 5150 // The Type is null if no type was specified, and the DeclSpec is invalid 5151 // in this case. 5152 ParsedType Type; 5153 ObjCDeclSpec DeclSpec; 5154 5155 /// ArgAttrs - Attribute list for this argument. 5156 AttributeList *ArgAttrs; 5157 }; 5158 5159 Decl *ActOnMethodDeclaration( 5160 Scope *S, 5161 SourceLocation BeginLoc, // location of the + or -. 5162 SourceLocation EndLoc, // location of the ; or {. 5163 tok::TokenKind MethodType, 5164 ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5165 SourceLocation SelectorStartLoc, Selector Sel, 5166 // optional arguments. The number of types/arguments is obtained 5167 // from the Sel.getNumArgs(). 5168 ObjCArgInfo *ArgInfo, 5169 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5170 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5171 bool isVariadic, bool MethodDefinition); 5172 5173 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5174 // Will search "local" class/category implementations for a method decl. 5175 // Will also search in class's root looking for instance method. 5176 // Returns 0 if no method is found. 5177 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5178 ObjCInterfaceDecl *CDecl); 5179 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5180 ObjCInterfaceDecl *ClassDecl); 5181 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5182 const ObjCObjectPointerType *OPT, 5183 bool IsInstance); 5184 5185 bool inferObjCARCLifetime(ValueDecl *decl); 5186 5187 ExprResult 5188 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5189 Expr *BaseExpr, 5190 SourceLocation OpLoc, 5191 DeclarationName MemberName, 5192 SourceLocation MemberLoc, 5193 SourceLocation SuperLoc, QualType SuperType, 5194 bool Super); 5195 5196 ExprResult 5197 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5198 IdentifierInfo &propertyName, 5199 SourceLocation receiverNameLoc, 5200 SourceLocation propertyNameLoc); 5201 5202 ObjCMethodDecl *tryCaptureObjCSelf(); 5203 5204 /// \brief Describes the kind of message expression indicated by a message 5205 /// send that starts with an identifier. 5206 enum ObjCMessageKind { 5207 /// \brief The message is sent to 'super'. 5208 ObjCSuperMessage, 5209 /// \brief The message is an instance message. 5210 ObjCInstanceMessage, 5211 /// \brief The message is a class message, and the identifier is a type 5212 /// name. 5213 ObjCClassMessage 5214 }; 5215 5216 ObjCMessageKind getObjCMessageKind(Scope *S, 5217 IdentifierInfo *Name, 5218 SourceLocation NameLoc, 5219 bool IsSuper, 5220 bool HasTrailingDot, 5221 ParsedType &ReceiverType); 5222 5223 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5224 Selector Sel, 5225 SourceLocation LBracLoc, 5226 SourceLocation SelectorLoc, 5227 SourceLocation RBracLoc, 5228 MultiExprArg Args); 5229 5230 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5231 QualType ReceiverType, 5232 SourceLocation SuperLoc, 5233 Selector Sel, 5234 ObjCMethodDecl *Method, 5235 SourceLocation LBracLoc, 5236 SourceLocation SelectorLoc, 5237 SourceLocation RBracLoc, 5238 MultiExprArg Args); 5239 5240 ExprResult ActOnClassMessage(Scope *S, 5241 ParsedType Receiver, 5242 Selector Sel, 5243 SourceLocation LBracLoc, 5244 SourceLocation SelectorLoc, 5245 SourceLocation RBracLoc, 5246 MultiExprArg Args); 5247 5248 ExprResult BuildInstanceMessage(Expr *Receiver, 5249 QualType ReceiverType, 5250 SourceLocation SuperLoc, 5251 Selector Sel, 5252 ObjCMethodDecl *Method, 5253 SourceLocation LBracLoc, 5254 SourceLocation SelectorLoc, 5255 SourceLocation RBracLoc, 5256 MultiExprArg Args); 5257 5258 ExprResult ActOnInstanceMessage(Scope *S, 5259 Expr *Receiver, 5260 Selector Sel, 5261 SourceLocation LBracLoc, 5262 SourceLocation SelectorLoc, 5263 SourceLocation RBracLoc, 5264 MultiExprArg Args); 5265 5266 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5267 ObjCBridgeCastKind Kind, 5268 SourceLocation BridgeKeywordLoc, 5269 TypeSourceInfo *TSInfo, 5270 Expr *SubExpr); 5271 5272 ExprResult ActOnObjCBridgedCast(Scope *S, 5273 SourceLocation LParenLoc, 5274 ObjCBridgeCastKind Kind, 5275 SourceLocation BridgeKeywordLoc, 5276 ParsedType Type, 5277 SourceLocation RParenLoc, 5278 Expr *SubExpr); 5279 5280 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5281 5282 /// \brief Check whether the given new method is a valid override of the 5283 /// given overridden method, and set any properties that should be inherited. 5284 /// 5285 /// \returns True if an error occurred. 5286 bool CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5287 const ObjCMethodDecl *Overridden, 5288 bool IsImplementation); 5289 5290 /// \brief Check whether the given method overrides any methods in its class, 5291 /// calling \c CheckObjCMethodOverride for each overridden method. 5292 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5293 5294 enum PragmaOptionsAlignKind { 5295 POAK_Native, // #pragma options align=native 5296 POAK_Natural, // #pragma options align=natural 5297 POAK_Packed, // #pragma options align=packed 5298 POAK_Power, // #pragma options align=power 5299 POAK_Mac68k, // #pragma options align=mac68k 5300 POAK_Reset // #pragma options align=reset 5301 }; 5302 5303 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5304 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5305 SourceLocation PragmaLoc, 5306 SourceLocation KindLoc); 5307 5308 enum PragmaPackKind { 5309 PPK_Default, // #pragma pack([n]) 5310 PPK_Show, // #pragma pack(show), only supported by MSVC. 5311 PPK_Push, // #pragma pack(push, [identifier], [n]) 5312 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5313 }; 5314 5315 enum PragmaMSStructKind { 5316 PMSST_OFF, // #pragms ms_struct off 5317 PMSST_ON // #pragms ms_struct on 5318 }; 5319 5320 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5321 void ActOnPragmaPack(PragmaPackKind Kind, 5322 IdentifierInfo *Name, 5323 Expr *Alignment, 5324 SourceLocation PragmaLoc, 5325 SourceLocation LParenLoc, 5326 SourceLocation RParenLoc); 5327 5328 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5329 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5330 5331 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5332 void ActOnPragmaUnused(const Token &Identifier, 5333 Scope *curScope, 5334 SourceLocation PragmaLoc); 5335 5336 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5337 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 5338 SourceLocation PragmaLoc); 5339 5340 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II, 5341 SourceLocation Loc); 5342 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5343 5344 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5345 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5346 SourceLocation PragmaLoc, 5347 SourceLocation WeakNameLoc); 5348 5349 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5350 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5351 IdentifierInfo* AliasName, 5352 SourceLocation PragmaLoc, 5353 SourceLocation WeakNameLoc, 5354 SourceLocation AliasNameLoc); 5355 5356 /// ActOnPragmaFPContract - Called on well formed 5357 /// #pragma {STDC,OPENCL} FP_CONTRACT 5358 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5359 5360 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5361 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5362 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5363 5364 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5365 void AddMsStructLayoutForRecord(RecordDecl *RD); 5366 5367 /// FreePackedContext - Deallocate and null out PackContext. 5368 void FreePackedContext(); 5369 5370 /// PushNamespaceVisibilityAttr - Note that we've entered a 5371 /// namespace with a visibility attribute. 5372 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 5373 5374 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5375 /// add an appropriate visibility attribute. 5376 void AddPushedVisibilityAttribute(Decl *RD); 5377 5378 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5379 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5380 void PopPragmaVisibility(); 5381 5382 /// FreeVisContext - Deallocate and null out VisContext. 5383 void FreeVisContext(); 5384 5385 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5386 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, Expr *E); 5387 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, TypeSourceInfo *T); 5388 5389 /// CastCategory - Get the correct forwarded implicit cast result category 5390 /// from the inner expression. 5391 ExprValueKind CastCategory(Expr *E); 5392 5393 /// \brief The kind of conversion being performed. 5394 enum CheckedConversionKind { 5395 /// \brief An implicit conversion. 5396 CCK_ImplicitConversion, 5397 /// \brief A C-style cast. 5398 CCK_CStyleCast, 5399 /// \brief A functional-style cast. 5400 CCK_FunctionalCast, 5401 /// \brief A cast other than a C-style cast. 5402 CCK_OtherCast 5403 }; 5404 5405 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5406 /// cast. If there is already an implicit cast, merge into the existing one. 5407 /// If isLvalue, the result of the cast is an lvalue. 5408 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5409 ExprValueKind VK = VK_RValue, 5410 const CXXCastPath *BasePath = 0, 5411 CheckedConversionKind CCK 5412 = CCK_ImplicitConversion); 5413 5414 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5415 /// to the conversion from scalar type ScalarTy to the Boolean type. 5416 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5417 5418 /// IgnoredValueConversions - Given that an expression's result is 5419 /// syntactically ignored, perform any conversions that are 5420 /// required. 5421 ExprResult IgnoredValueConversions(Expr *E); 5422 5423 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5424 // functions and arrays to their respective pointers (C99 6.3.2.1). 5425 ExprResult UsualUnaryConversions(Expr *E); 5426 5427 // DefaultFunctionArrayConversion - converts functions and arrays 5428 // to their respective pointers (C99 6.3.2.1). 5429 ExprResult DefaultFunctionArrayConversion(Expr *E); 5430 5431 // DefaultFunctionArrayLvalueConversion - converts functions and 5432 // arrays to their respective pointers and performs the 5433 // lvalue-to-rvalue conversion. 5434 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5435 5436 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5437 // the operand. This is DefaultFunctionArrayLvalueConversion, 5438 // except that it assumes the operand isn't of function or array 5439 // type. 5440 ExprResult DefaultLvalueConversion(Expr *E); 5441 5442 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5443 // do not have a prototype. Integer promotions are performed on each 5444 // argument, and arguments that have type float are promoted to double. 5445 ExprResult DefaultArgumentPromotion(Expr *E); 5446 5447 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5448 enum VariadicCallType { 5449 VariadicFunction, 5450 VariadicBlock, 5451 VariadicMethod, 5452 VariadicConstructor, 5453 VariadicDoesNotApply 5454 }; 5455 5456 /// GatherArgumentsForCall - Collector argument expressions for various 5457 /// form of call prototypes. 5458 bool GatherArgumentsForCall(SourceLocation CallLoc, 5459 FunctionDecl *FDecl, 5460 const FunctionProtoType *Proto, 5461 unsigned FirstProtoArg, 5462 Expr **Args, unsigned NumArgs, 5463 SmallVector<Expr *, 8> &AllArgs, 5464 VariadicCallType CallType = VariadicDoesNotApply); 5465 5466 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5467 // will warn if the resulting type is not a POD type. 5468 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5469 FunctionDecl *FDecl); 5470 5471 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5472 // operands and then handles various conversions that are common to binary 5473 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5474 // routine returns the first non-arithmetic type found. The client is 5475 // responsible for emitting appropriate error diagnostics. 5476 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS, 5477 bool IsCompAssign = false); 5478 5479 /// AssignConvertType - All of the 'assignment' semantic checks return this 5480 /// enum to indicate whether the assignment was allowed. These checks are 5481 /// done for simple assignments, as well as initialization, return from 5482 /// function, argument passing, etc. The query is phrased in terms of a 5483 /// source and destination type. 5484 enum AssignConvertType { 5485 /// Compatible - the types are compatible according to the standard. 5486 Compatible, 5487 5488 /// PointerToInt - The assignment converts a pointer to an int, which we 5489 /// accept as an extension. 5490 PointerToInt, 5491 5492 /// IntToPointer - The assignment converts an int to a pointer, which we 5493 /// accept as an extension. 5494 IntToPointer, 5495 5496 /// FunctionVoidPointer - The assignment is between a function pointer and 5497 /// void*, which the standard doesn't allow, but we accept as an extension. 5498 FunctionVoidPointer, 5499 5500 /// IncompatiblePointer - The assignment is between two pointers types that 5501 /// are not compatible, but we accept them as an extension. 5502 IncompatiblePointer, 5503 5504 /// IncompatiblePointer - The assignment is between two pointers types which 5505 /// point to integers which have a different sign, but are otherwise identical. 5506 /// This is a subset of the above, but broken out because it's by far the most 5507 /// common case of incompatible pointers. 5508 IncompatiblePointerSign, 5509 5510 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5511 /// c/v/r qualifiers, which we accept as an extension. 5512 CompatiblePointerDiscardsQualifiers, 5513 5514 /// IncompatiblePointerDiscardsQualifiers - The assignment 5515 /// discards qualifiers that we don't permit to be discarded, 5516 /// like address spaces. 5517 IncompatiblePointerDiscardsQualifiers, 5518 5519 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5520 /// nested pointer types, and the qualifiers other than the first two 5521 /// levels differ e.g. char ** -> const char **, but we accept them as an 5522 /// extension. 5523 IncompatibleNestedPointerQualifiers, 5524 5525 /// IncompatibleVectors - The assignment is between two vector types that 5526 /// have the same size, which we accept as an extension. 5527 IncompatibleVectors, 5528 5529 /// IntToBlockPointer - The assignment converts an int to a block 5530 /// pointer. We disallow this. 5531 IntToBlockPointer, 5532 5533 /// IncompatibleBlockPointer - The assignment is between two block 5534 /// pointers types that are not compatible. 5535 IncompatibleBlockPointer, 5536 5537 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5538 /// id type and something else (that is incompatible with it). For example, 5539 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5540 IncompatibleObjCQualifiedId, 5541 5542 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 5543 /// object with __weak qualifier. 5544 IncompatibleObjCWeakRef, 5545 5546 /// Incompatible - We reject this conversion outright, it is invalid to 5547 /// represent it in the AST. 5548 Incompatible 5549 }; 5550 5551 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5552 /// assignment conversion type specified by ConvTy. This returns true if the 5553 /// conversion was invalid or false if the conversion was accepted. 5554 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5555 SourceLocation Loc, 5556 QualType DstType, QualType SrcType, 5557 Expr *SrcExpr, AssignmentAction Action, 5558 bool *Complained = 0); 5559 5560 /// CheckAssignmentConstraints - Perform type checking for assignment, 5561 /// argument passing, variable initialization, and function return values. 5562 /// C99 6.5.16. 5563 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5564 QualType LHSType, 5565 QualType RHSType); 5566 5567 /// Check assignment constraints and prepare for a conversion of the 5568 /// RHS to the LHS type. 5569 AssignConvertType CheckAssignmentConstraints(QualType LHSType, 5570 ExprResult &RHS, 5571 CastKind &Kind); 5572 5573 // CheckSingleAssignmentConstraints - Currently used by 5574 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5575 // this routine performs the default function/array converions. 5576 AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType, 5577 ExprResult &RHS); 5578 5579 // \brief If the lhs type is a transparent union, check whether we 5580 // can initialize the transparent union with the given expression. 5581 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType, 5582 ExprResult &RHS); 5583 5584 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5585 5586 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5587 5588 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5589 AssignmentAction Action, 5590 bool AllowExplicit = false); 5591 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5592 AssignmentAction Action, 5593 bool AllowExplicit, 5594 ImplicitConversionSequence& ICS); 5595 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5596 const ImplicitConversionSequence& ICS, 5597 AssignmentAction Action, 5598 CheckedConversionKind CCK 5599 = CCK_ImplicitConversion); 5600 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5601 const StandardConversionSequence& SCS, 5602 AssignmentAction Action, 5603 CheckedConversionKind CCK); 5604 5605 /// the following "Check" methods will return a valid/converted QualType 5606 /// or a null QualType (indicating an error diagnostic was issued). 5607 5608 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5609 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS, 5610 ExprResult &RHS); 5611 QualType CheckPointerToMemberOperands( // C++ 5.5 5612 ExprResult &lex, ExprResult &rex, ExprValueKind &VK, 5613 SourceLocation OpLoc, bool isIndirect); 5614 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5615 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign, 5616 bool IsDivide); 5617 QualType CheckRemainderOperands( // C99 6.5.5 5618 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5619 bool IsCompAssign = false); 5620 QualType CheckAdditionOperands( // C99 6.5.6 5621 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5622 QualType* CompLHSTy = 0); 5623 QualType CheckSubtractionOperands( // C99 6.5.6 5624 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5625 QualType* CompLHSTy = 0); 5626 QualType CheckShiftOperands( // C99 6.5.7 5627 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 5628 bool IsCompAssign = false); 5629 QualType CheckCompareOperands( // C99 6.5.8/9 5630 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned OpaqueOpc, 5631 bool isRelational); 5632 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 5633 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5634 bool IsCompAssign = false); 5635 QualType CheckLogicalOperands( // C99 6.5.[13,14] 5636 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc); 5637 // CheckAssignmentOperands is used for both simple and compound assignment. 5638 // For simple assignment, pass both expressions and a null converted type. 5639 // For compound assignment, pass both expressions and the converted type. 5640 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 5641 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType); 5642 5643 void ConvertPropertyForLValue(ExprResult &LHS, ExprResult &RHS, 5644 QualType& LHSTy); 5645 ExprResult ConvertPropertyForRValue(Expr *E); 5646 5647 QualType CheckConditionalOperands( // C99 6.5.15 5648 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS, 5649 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc); 5650 QualType CXXCheckConditionalOperands( // C++ 5.16 5651 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5652 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5653 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 5654 bool *NonStandardCompositeType = 0); 5655 QualType FindCompositePointerType(SourceLocation Loc, ExprResult &E1, ExprResult &E2, 5656 bool *NonStandardCompositeType = 0) { 5657 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 5658 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, NonStandardCompositeType); 5659 E1 = Owned(E1Tmp); 5660 E2 = Owned(E2Tmp); 5661 return Composite; 5662 } 5663 5664 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5665 SourceLocation QuestionLoc); 5666 5667 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr, 5668 SourceLocation QuestionLoc); 5669 5670 /// type checking for vector binary operators. 5671 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS, 5672 SourceLocation Loc, bool IsCompAssign); 5673 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS, 5674 SourceLocation Loc, bool isRelational); 5675 5676 /// type checking declaration initializers (C99 6.7.8) 5677 bool CheckInitList(const InitializedEntity &Entity, 5678 InitListExpr *&InitList, QualType &DeclType); 5679 bool CheckForConstantInitializer(Expr *e, QualType t); 5680 5681 // type checking C++ declaration initializers (C++ [dcl.init]). 5682 5683 /// ReferenceCompareResult - Expresses the result of comparing two 5684 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5685 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5686 enum ReferenceCompareResult { 5687 /// Ref_Incompatible - The two types are incompatible, so direct 5688 /// reference binding is not possible. 5689 Ref_Incompatible = 0, 5690 /// Ref_Related - The two types are reference-related, which means 5691 /// that their unqualified forms (T1 and T2) are either the same 5692 /// or T1 is a base class of T2. 5693 Ref_Related, 5694 /// Ref_Compatible_With_Added_Qualification - The two types are 5695 /// reference-compatible with added qualification, meaning that 5696 /// they are reference-compatible and the qualifiers on T1 (cv1) 5697 /// are greater than the qualifiers on T2 (cv2). 5698 Ref_Compatible_With_Added_Qualification, 5699 /// Ref_Compatible - The two types are reference-compatible and 5700 /// have equivalent qualifiers (cv1 == cv2). 5701 Ref_Compatible 5702 }; 5703 5704 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 5705 QualType T1, QualType T2, 5706 bool &DerivedToBase, 5707 bool &ObjCConversion, 5708 bool &ObjCLifetimeConversion); 5709 5710 /// CheckCastTypes - Check type constraints for casting between types under 5711 /// C semantics, or forward to CXXCheckCStyleCast in C++. 5712 ExprResult CheckCastTypes(SourceLocation CastStartLoc, SourceRange TypeRange, 5713 QualType CastType, Expr *CastExpr, CastKind &Kind, 5714 ExprValueKind &VK, CXXCastPath &BasePath, 5715 bool FunctionalStyle = false); 5716 5717 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType, 5718 Expr *CastExpr, CastKind &CastKind, 5719 ExprValueKind &VK, CXXCastPath &Path); 5720 5721 // CheckVectorCast - check type constraints for vectors. 5722 // Since vectors are an extension, there are no C standard reference for this. 5723 // We allow casting between vectors and integer datatypes of the same size. 5724 // returns true if the cast is invalid 5725 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 5726 CastKind &Kind); 5727 5728 // CheckExtVectorCast - check type constraints for extended vectors. 5729 // Since vectors are an extension, there are no C standard reference for this. 5730 // We allow casting between vectors and integer datatypes of the same size, 5731 // or vectors and the element type of that vector. 5732 // returns the cast expr 5733 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr, 5734 CastKind &Kind); 5735 5736 /// CXXCheckCStyleCast - Check constraints of a C-style or function-style 5737 /// cast under C++ semantics. 5738 ExprResult CXXCheckCStyleCast(SourceRange R, QualType CastTy, ExprValueKind &VK, 5739 Expr *CastExpr, CastKind &Kind, 5740 CXXCastPath &BasePath, bool FunctionalStyle); 5741 5742 /// \brief Checks for valid expressions which can be cast to an ObjC 5743 /// pointer without needing a bridge cast. 5744 bool ValidObjCARCNoBridgeCastExpr(Expr *&Exp, QualType castType); 5745 5746 /// \brief Checks for invalid conversions and casts between 5747 /// retainable pointers and other pointer kinds. 5748 void CheckObjCARCConversion(SourceRange castRange, QualType castType, 5749 Expr *&op, CheckedConversionKind CCK); 5750 5751 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 5752 QualType ExprType); 5753 5754 /// checkRetainCycles - Check whether an Objective-C message send 5755 /// might create an obvious retain cycle. 5756 void checkRetainCycles(ObjCMessageExpr *msg); 5757 void checkRetainCycles(Expr *receiver, Expr *argument); 5758 5759 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 5760 /// to weak/__unsafe_unretained type. 5761 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 5762 5763 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 5764 /// to weak/__unsafe_unretained expression. 5765 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 5766 5767 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 5768 /// \param Method - May be null. 5769 /// \param [out] ReturnType - The return type of the send. 5770 /// \return true iff there were any incompatible types. 5771 bool CheckMessageArgumentTypes(QualType ReceiverType, 5772 Expr **Args, unsigned NumArgs, Selector Sel, 5773 ObjCMethodDecl *Method, bool isClassMessage, 5774 bool isSuperMessage, 5775 SourceLocation lbrac, SourceLocation rbrac, 5776 QualType &ReturnType, ExprValueKind &VK); 5777 5778 /// \brief Determine the result of a message send expression based on 5779 /// the type of the receiver, the method expected to receive the message, 5780 /// and the form of the message send. 5781 QualType getMessageSendResultType(QualType ReceiverType, 5782 ObjCMethodDecl *Method, 5783 bool isClassMessage, bool isSuperMessage); 5784 5785 /// \brief If the given expression involves a message send to a method 5786 /// with a related result type, emit a note describing what happened. 5787 void EmitRelatedResultTypeNote(const Expr *E); 5788 5789 /// CheckBooleanCondition - Diagnose problems involving the use of 5790 /// the given expression as a boolean condition (e.g. in an if 5791 /// statement). Also performs the standard function and array 5792 /// decays, possibly changing the input variable. 5793 /// 5794 /// \param Loc - A location associated with the condition, e.g. the 5795 /// 'if' keyword. 5796 /// \return true iff there were any errors 5797 ExprResult CheckBooleanCondition(Expr *E, SourceLocation Loc); 5798 5799 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 5800 Expr *SubExpr); 5801 5802 /// DiagnoseAssignmentAsCondition - Given that an expression is 5803 /// being used as a boolean condition, warn if it's an assignment. 5804 void DiagnoseAssignmentAsCondition(Expr *E); 5805 5806 /// \brief Redundant parentheses over an equality comparison can indicate 5807 /// that the user intended an assignment used as condition. 5808 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE); 5809 5810 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 5811 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 5812 5813 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 5814 /// the specified width and sign. If an overflow occurs, detect it and emit 5815 /// the specified diagnostic. 5816 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 5817 unsigned NewWidth, bool NewSign, 5818 SourceLocation Loc, unsigned DiagID); 5819 5820 /// Checks that the Objective-C declaration is declared in the global scope. 5821 /// Emits an error and marks the declaration as invalid if it's not declared 5822 /// in the global scope. 5823 bool CheckObjCDeclScope(Decl *D); 5824 5825 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 5826 /// and reports the appropriate diagnostics. Returns false on success. 5827 /// Can optionally return the value of the expression. 5828 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 5829 5830 /// VerifyBitField - verifies that a bit field expression is an ICE and has 5831 /// the correct width, and that the field type is valid. 5832 /// Returns false on success. 5833 /// Can optionally return whether the bit-field is of width 0 5834 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 5835 QualType FieldTy, const Expr *BitWidth, 5836 bool *ZeroWidth = 0); 5837 5838 /// \name Code completion 5839 //@{ 5840 /// \brief Describes the context in which code completion occurs. 5841 enum ParserCompletionContext { 5842 /// \brief Code completion occurs at top-level or namespace context. 5843 PCC_Namespace, 5844 /// \brief Code completion occurs within a class, struct, or union. 5845 PCC_Class, 5846 /// \brief Code completion occurs within an Objective-C interface, protocol, 5847 /// or category. 5848 PCC_ObjCInterface, 5849 /// \brief Code completion occurs within an Objective-C implementation or 5850 /// category implementation 5851 PCC_ObjCImplementation, 5852 /// \brief Code completion occurs within the list of instance variables 5853 /// in an Objective-C interface, protocol, category, or implementation. 5854 PCC_ObjCInstanceVariableList, 5855 /// \brief Code completion occurs following one or more template 5856 /// headers. 5857 PCC_Template, 5858 /// \brief Code completion occurs following one or more template 5859 /// headers within a class. 5860 PCC_MemberTemplate, 5861 /// \brief Code completion occurs within an expression. 5862 PCC_Expression, 5863 /// \brief Code completion occurs within a statement, which may 5864 /// also be an expression or a declaration. 5865 PCC_Statement, 5866 /// \brief Code completion occurs at the beginning of the 5867 /// initialization statement (or expression) in a for loop. 5868 PCC_ForInit, 5869 /// \brief Code completion occurs within the condition of an if, 5870 /// while, switch, or for statement. 5871 PCC_Condition, 5872 /// \brief Code completion occurs within the body of a function on a 5873 /// recovery path, where we do not have a specific handle on our position 5874 /// in the grammar. 5875 PCC_RecoveryInFunction, 5876 /// \brief Code completion occurs where only a type is permitted. 5877 PCC_Type, 5878 /// \brief Code completion occurs in a parenthesized expression, which 5879 /// might also be a type cast. 5880 PCC_ParenthesizedExpression, 5881 /// \brief Code completion occurs within a sequence of declaration 5882 /// specifiers within a function, method, or block. 5883 PCC_LocalDeclarationSpecifiers 5884 }; 5885 5886 void CodeCompleteOrdinaryName(Scope *S, 5887 ParserCompletionContext CompletionContext); 5888 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 5889 bool AllowNonIdentifiers, 5890 bool AllowNestedNameSpecifiers); 5891 5892 struct CodeCompleteExpressionData; 5893 void CodeCompleteExpression(Scope *S, 5894 const CodeCompleteExpressionData &Data); 5895 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 5896 SourceLocation OpLoc, 5897 bool IsArrow); 5898 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 5899 void CodeCompleteTag(Scope *S, unsigned TagSpec); 5900 void CodeCompleteTypeQualifiers(DeclSpec &DS); 5901 void CodeCompleteCase(Scope *S); 5902 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 5903 void CodeCompleteInitializer(Scope *S, Decl *D); 5904 void CodeCompleteReturn(Scope *S); 5905 void CodeCompleteAfterIf(Scope *S); 5906 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 5907 5908 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 5909 bool EnteringContext); 5910 void CodeCompleteUsing(Scope *S); 5911 void CodeCompleteUsingDirective(Scope *S); 5912 void CodeCompleteNamespaceDecl(Scope *S); 5913 void CodeCompleteNamespaceAliasDecl(Scope *S); 5914 void CodeCompleteOperatorName(Scope *S); 5915 void CodeCompleteConstructorInitializer(Decl *Constructor, 5916 CXXCtorInitializer** Initializers, 5917 unsigned NumInitializers); 5918 5919 void CodeCompleteObjCAtDirective(Scope *S); 5920 void CodeCompleteObjCAtVisibility(Scope *S); 5921 void CodeCompleteObjCAtStatement(Scope *S); 5922 void CodeCompleteObjCAtExpression(Scope *S); 5923 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 5924 void CodeCompleteObjCPropertyGetter(Scope *S); 5925 void CodeCompleteObjCPropertySetter(Scope *S); 5926 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 5927 bool IsParameter); 5928 void CodeCompleteObjCMessageReceiver(Scope *S); 5929 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 5930 IdentifierInfo **SelIdents, 5931 unsigned NumSelIdents, 5932 bool AtArgumentExpression); 5933 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 5934 IdentifierInfo **SelIdents, 5935 unsigned NumSelIdents, 5936 bool AtArgumentExpression, 5937 bool IsSuper = false); 5938 void CodeCompleteObjCInstanceMessage(Scope *S, ExprTy *Receiver, 5939 IdentifierInfo **SelIdents, 5940 unsigned NumSelIdents, 5941 bool AtArgumentExpression, 5942 ObjCInterfaceDecl *Super = 0); 5943 void CodeCompleteObjCForCollection(Scope *S, 5944 DeclGroupPtrTy IterationVar); 5945 void CodeCompleteObjCSelector(Scope *S, 5946 IdentifierInfo **SelIdents, 5947 unsigned NumSelIdents); 5948 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 5949 unsigned NumProtocols); 5950 void CodeCompleteObjCProtocolDecl(Scope *S); 5951 void CodeCompleteObjCInterfaceDecl(Scope *S); 5952 void CodeCompleteObjCSuperclass(Scope *S, 5953 IdentifierInfo *ClassName, 5954 SourceLocation ClassNameLoc); 5955 void CodeCompleteObjCImplementationDecl(Scope *S); 5956 void CodeCompleteObjCInterfaceCategory(Scope *S, 5957 IdentifierInfo *ClassName, 5958 SourceLocation ClassNameLoc); 5959 void CodeCompleteObjCImplementationCategory(Scope *S, 5960 IdentifierInfo *ClassName, 5961 SourceLocation ClassNameLoc); 5962 void CodeCompleteObjCPropertyDefinition(Scope *S); 5963 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 5964 IdentifierInfo *PropertyName); 5965 void CodeCompleteObjCMethodDecl(Scope *S, 5966 bool IsInstanceMethod, 5967 ParsedType ReturnType); 5968 void CodeCompleteObjCMethodDeclSelector(Scope *S, 5969 bool IsInstanceMethod, 5970 bool AtParameterName, 5971 ParsedType ReturnType, 5972 IdentifierInfo **SelIdents, 5973 unsigned NumSelIdents); 5974 void CodeCompletePreprocessorDirective(bool InConditional); 5975 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 5976 void CodeCompletePreprocessorMacroName(bool IsDefinition); 5977 void CodeCompletePreprocessorExpression(); 5978 void CodeCompletePreprocessorMacroArgument(Scope *S, 5979 IdentifierInfo *Macro, 5980 MacroInfo *MacroInfo, 5981 unsigned Argument); 5982 void CodeCompleteNaturalLanguage(); 5983 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 5984 SmallVectorImpl<CodeCompletionResult> &Results); 5985 //@} 5986 5987 //===--------------------------------------------------------------------===// 5988 // Extra semantic analysis beyond the C type system 5989 5990public: 5991 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 5992 unsigned ByteNo) const; 5993 5994private: 5995 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr, 5996 bool isSubscript=false, bool AllowOnePastEnd=true); 5997 void CheckArrayAccess(const Expr *E); 5998 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 5999 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 6000 6001 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 6002 bool CheckObjCString(Expr *Arg); 6003 6004 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6005 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6006 6007 bool SemaBuiltinVAStart(CallExpr *TheCall); 6008 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 6009 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 6010 6011public: 6012 // Used by C++ template instantiation. 6013 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 6014 6015private: 6016 bool SemaBuiltinPrefetch(CallExpr *TheCall); 6017 bool SemaBuiltinObjectSize(CallExpr *TheCall); 6018 bool SemaBuiltinLongjmp(CallExpr *TheCall); 6019 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 6020 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 6021 llvm::APSInt &Result); 6022 6023 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 6024 bool HasVAListArg, unsigned format_idx, 6025 unsigned firstDataArg, bool isPrintf); 6026 6027 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 6028 const CallExpr *TheCall, bool HasVAListArg, 6029 unsigned format_idx, unsigned firstDataArg, 6030 bool isPrintf); 6031 6032 void CheckNonNullArguments(const NonNullAttr *NonNull, 6033 const Expr * const *ExprArgs, 6034 SourceLocation CallSiteLoc); 6035 6036 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 6037 unsigned format_idx, unsigned firstDataArg, 6038 bool isPrintf); 6039 6040 /// \brief Enumeration used to describe which of the memory setting or copying 6041 /// functions is being checked by \c CheckMemaccessArguments(). 6042 enum CheckedMemoryFunction { 6043 CMF_Memset, 6044 CMF_Memcpy, 6045 CMF_Memmove, 6046 CMF_Memcmp 6047 }; 6048 6049 void CheckMemaccessArguments(const CallExpr *Call, CheckedMemoryFunction CMF, 6050 IdentifierInfo *FnName); 6051 6052 void CheckStrlcpycatArguments(const CallExpr *Call, 6053 IdentifierInfo *FnName); 6054 6055 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 6056 SourceLocation ReturnLoc); 6057 void CheckFloatComparison(SourceLocation loc, Expr* lex, Expr* rex); 6058 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 6059 6060 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 6061 Expr *Init); 6062 6063 /// \brief The parser's current scope. 6064 /// 6065 /// The parser maintains this state here. 6066 Scope *CurScope; 6067 6068protected: 6069 friend class Parser; 6070 friend class InitializationSequence; 6071 friend class ASTReader; 6072 friend class ASTWriter; 6073 6074public: 6075 /// \brief Retrieve the parser's current scope. 6076 /// 6077 /// This routine must only be used when it is certain that semantic analysis 6078 /// and the parser are in precisely the same context, which is not the case 6079 /// when, e.g., we are performing any kind of template instantiation. 6080 /// Therefore, the only safe places to use this scope are in the parser 6081 /// itself and in routines directly invoked from the parser and *never* from 6082 /// template substitution or instantiation. 6083 Scope *getCurScope() const { return CurScope; } 6084 6085 Decl *getObjCDeclContext() const; 6086}; 6087 6088/// \brief RAII object that enters a new expression evaluation context. 6089class EnterExpressionEvaluationContext { 6090 Sema &Actions; 6091 6092public: 6093 EnterExpressionEvaluationContext(Sema &Actions, 6094 Sema::ExpressionEvaluationContext NewContext) 6095 : Actions(Actions) { 6096 Actions.PushExpressionEvaluationContext(NewContext); 6097 } 6098 6099 ~EnterExpressionEvaluationContext() { 6100 Actions.PopExpressionEvaluationContext(); 6101 } 6102}; 6103 6104} // end namespace clang 6105 6106#endif 6107