Sema.h revision 898267f67b8131c4bed4430e2cfaf69ccf4c2de1
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 bool RequireCompleteType(SourceLocation Loc, QualType T, 836 const PartialDiagnostic &PD, 837 std::pair<SourceLocation, PartialDiagnostic> Note); 838 bool RequireCompleteType(SourceLocation Loc, QualType T, 839 const PartialDiagnostic &PD); 840 bool RequireCompleteType(SourceLocation Loc, QualType T, 841 unsigned DiagID); 842 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 843 std::pair<SourceLocation, 844 PartialDiagnostic> Note); 845 846 847 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 848 const CXXScopeSpec &SS, QualType T); 849 850 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 851 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 852 QualType BuildUnaryTransformType(QualType BaseType, 853 UnaryTransformType::UTTKind UKind, 854 SourceLocation Loc); 855 856 //===--------------------------------------------------------------------===// 857 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 858 // 859 860 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 861 862 void DiagnoseUseOfUnimplementedSelectors(); 863 864 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 865 Scope *S, CXXScopeSpec *SS = 0, 866 bool isClassName = false, 867 bool HasTrailingDot = false, 868 ParsedType ObjectType = ParsedType(), 869 bool WantNontrivialTypeSourceInfo = false); 870 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 871 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS); 872 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 873 SourceLocation IILoc, 874 Scope *S, 875 CXXScopeSpec *SS, 876 ParsedType &SuggestedType); 877 878 /// \brief Describes the result of the name lookup and resolution performed 879 /// by \c ClassifyName(). 880 enum NameClassificationKind { 881 NC_Unknown, 882 NC_Error, 883 NC_Keyword, 884 NC_Type, 885 NC_Expression, 886 NC_NestedNameSpecifier, 887 NC_TypeTemplate, 888 NC_FunctionTemplate 889 }; 890 891 class NameClassification { 892 NameClassificationKind Kind; 893 ExprResult Expr; 894 TemplateName Template; 895 ParsedType Type; 896 const IdentifierInfo *Keyword; 897 898 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 899 900 public: 901 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 902 903 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 904 905 NameClassification(const IdentifierInfo *Keyword) 906 : Kind(NC_Keyword), Keyword(Keyword) { } 907 908 static NameClassification Error() { 909 return NameClassification(NC_Error); 910 } 911 912 static NameClassification Unknown() { 913 return NameClassification(NC_Unknown); 914 } 915 916 static NameClassification NestedNameSpecifier() { 917 return NameClassification(NC_NestedNameSpecifier); 918 } 919 920 static NameClassification TypeTemplate(TemplateName Name) { 921 NameClassification Result(NC_TypeTemplate); 922 Result.Template = Name; 923 return Result; 924 } 925 926 static NameClassification FunctionTemplate(TemplateName Name) { 927 NameClassification Result(NC_FunctionTemplate); 928 Result.Template = Name; 929 return Result; 930 } 931 932 NameClassificationKind getKind() const { return Kind; } 933 934 ParsedType getType() const { 935 assert(Kind == NC_Type); 936 return Type; 937 } 938 939 ExprResult getExpression() const { 940 assert(Kind == NC_Expression); 941 return Expr; 942 } 943 944 TemplateName getTemplateName() const { 945 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 946 return Template; 947 } 948 949 TemplateNameKind getTemplateNameKind() const { 950 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 951 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 952 } 953}; 954 955 /// \brief Perform name lookup on the given name, classifying it based on 956 /// the results of name lookup and the following token. 957 /// 958 /// This routine is used by the parser to resolve identifiers and help direct 959 /// parsing. When the identifier cannot be found, this routine will attempt 960 /// to correct the typo and classify based on the resulting name. 961 /// 962 /// \param S The scope in which we're performing name lookup. 963 /// 964 /// \param SS The nested-name-specifier that precedes the name. 965 /// 966 /// \param Name The identifier. If typo correction finds an alternative name, 967 /// this pointer parameter will be updated accordingly. 968 /// 969 /// \param NameLoc The location of the identifier. 970 /// 971 /// \param NextToken The token following the identifier. Used to help 972 /// disambiguate the name. 973 NameClassification ClassifyName(Scope *S, 974 CXXScopeSpec &SS, 975 IdentifierInfo *&Name, 976 SourceLocation NameLoc, 977 const Token &NextToken); 978 979 Decl *ActOnDeclarator(Scope *S, Declarator &D); 980 981 Decl *HandleDeclarator(Scope *S, Declarator &D, 982 MultiTemplateParamsArg TemplateParameterLists, 983 bool IsFunctionDefinition); 984 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 985 const LookupResult &Previous, 986 Scope *S); 987 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 988 void DiagnoseFunctionSpecifiers(Declarator& D); 989 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 990 void CheckShadow(Scope *S, VarDecl *D); 991 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 992 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 993 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 994 QualType R, TypeSourceInfo *TInfo, 995 LookupResult &Previous, bool &Redeclaration); 996 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 997 LookupResult &Previous, bool &Redeclaration); 998 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 999 QualType R, TypeSourceInfo *TInfo, 1000 LookupResult &Previous, 1001 MultiTemplateParamsArg TemplateParamLists, 1002 bool &Redeclaration); 1003 void CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous, 1004 bool &Redeclaration); 1005 void CheckCompleteVariableDeclaration(VarDecl *var); 1006 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1007 QualType R, TypeSourceInfo *TInfo, 1008 LookupResult &Previous, 1009 MultiTemplateParamsArg TemplateParamLists, 1010 bool IsFunctionDefinition, 1011 bool &Redeclaration, 1012 bool &AddToScope); 1013 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1014 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1015 void CheckFunctionDeclaration(Scope *S, 1016 FunctionDecl *NewFD, LookupResult &Previous, 1017 bool IsExplicitSpecialization, 1018 bool &Redeclaration); 1019 void CheckMain(FunctionDecl *FD); 1020 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1021 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1022 SourceLocation Loc, 1023 QualType T); 1024 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1025 SourceLocation NameLoc, IdentifierInfo *Name, 1026 QualType T, TypeSourceInfo *TSInfo, 1027 StorageClass SC, StorageClass SCAsWritten); 1028 void ActOnParamDefaultArgument(Decl *param, 1029 SourceLocation EqualLoc, 1030 Expr *defarg); 1031 void ActOnParamUnparsedDefaultArgument(Decl *param, 1032 SourceLocation EqualLoc, 1033 SourceLocation ArgLoc); 1034 void ActOnParamDefaultArgumentError(Decl *param); 1035 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1036 SourceLocation EqualLoc); 1037 1038 void CheckSelfReference(Decl *OrigDecl, Expr *E); 1039 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1040 bool TypeMayContainAuto); 1041 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1042 void ActOnInitializerError(Decl *Dcl); 1043 void ActOnCXXForRangeDecl(Decl *D); 1044 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1045 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1046 void FinalizeDeclaration(Decl *D); 1047 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1048 Decl **Group, 1049 unsigned NumDecls); 1050 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1051 bool TypeMayContainAuto = true); 1052 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1053 SourceLocation LocAfterDecls); 1054 void CheckForFunctionRedefinition(FunctionDecl *FD); 1055 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1056 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1057 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1058 1059 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1060 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1061 1062 /// \brief Diagnose any unused parameters in the given sequence of 1063 /// ParmVarDecl pointers. 1064 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1065 ParmVarDecl * const *End); 1066 1067 /// \brief Diagnose whether the size of parameters or return value of a 1068 /// function or obj-c method definition is pass-by-value and larger than a 1069 /// specified threshold. 1070 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1071 ParmVarDecl * const *End, 1072 QualType ReturnTy, 1073 NamedDecl *D); 1074 1075 void DiagnoseInvalidJumps(Stmt *Body); 1076 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1077 SourceLocation AsmLoc, 1078 SourceLocation RParenLoc); 1079 1080 /// \brief The parser has processed a module import declaration. 1081 /// 1082 /// \param ImportLoc The location of the '__import_module__' keyword. 1083 /// 1084 /// \param ModuleName The name of the module. 1085 /// 1086 /// \param ModuleNameLoc The location of the module name. 1087 DeclResult ActOnModuleImport(SourceLocation ImportLoc, 1088 IdentifierInfo &ModuleName, 1089 SourceLocation ModuleNameLoc); 1090 1091 /// Scope actions. 1092 void ActOnPopScope(SourceLocation Loc, Scope *S); 1093 void ActOnTranslationUnitScope(Scope *S); 1094 1095 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1096 DeclSpec &DS); 1097 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1098 DeclSpec &DS, 1099 MultiTemplateParamsArg TemplateParams); 1100 1101 StmtResult ActOnVlaStmt(const DeclSpec &DS); 1102 1103 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1104 AccessSpecifier AS, 1105 RecordDecl *Record); 1106 1107 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1108 RecordDecl *Record); 1109 1110 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1111 TagTypeKind NewTag, bool isDefinition, 1112 SourceLocation NewTagLoc, 1113 const IdentifierInfo &Name); 1114 1115 enum TagUseKind { 1116 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1117 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1118 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1119 TUK_Friend // Friend declaration: 'friend struct foo;' 1120 }; 1121 1122 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1123 SourceLocation KWLoc, CXXScopeSpec &SS, 1124 IdentifierInfo *Name, SourceLocation NameLoc, 1125 AttributeList *Attr, AccessSpecifier AS, 1126 MultiTemplateParamsArg TemplateParameterLists, 1127 bool &OwnedDecl, bool &IsDependent, bool ScopedEnum, 1128 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1129 1130 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1131 unsigned TagSpec, SourceLocation TagLoc, 1132 CXXScopeSpec &SS, 1133 IdentifierInfo *Name, SourceLocation NameLoc, 1134 AttributeList *Attr, 1135 MultiTemplateParamsArg TempParamLists); 1136 1137 TypeResult ActOnDependentTag(Scope *S, 1138 unsigned TagSpec, 1139 TagUseKind TUK, 1140 const CXXScopeSpec &SS, 1141 IdentifierInfo *Name, 1142 SourceLocation TagLoc, 1143 SourceLocation NameLoc); 1144 1145 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1146 IdentifierInfo *ClassName, 1147 SmallVectorImpl<Decl *> &Decls); 1148 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1149 Declarator &D, Expr *BitfieldWidth); 1150 1151 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1152 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1153 AccessSpecifier AS); 1154 1155 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1156 TypeSourceInfo *TInfo, 1157 RecordDecl *Record, SourceLocation Loc, 1158 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1159 SourceLocation TSSL, 1160 AccessSpecifier AS, NamedDecl *PrevDecl, 1161 Declarator *D = 0); 1162 1163 enum CXXSpecialMember { 1164 CXXDefaultConstructor, 1165 CXXCopyConstructor, 1166 CXXMoveConstructor, 1167 CXXCopyAssignment, 1168 CXXMoveAssignment, 1169 CXXDestructor, 1170 CXXInvalid 1171 }; 1172 bool CheckNontrivialField(FieldDecl *FD); 1173 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1174 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1175 void ActOnLastBitfield(SourceLocation DeclStart, 1176 SmallVectorImpl<Decl *> &AllIvarDecls); 1177 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, 1178 Declarator &D, Expr *BitfieldWidth, 1179 tok::ObjCKeywordKind visibility); 1180 1181 // This is used for both record definitions and ObjC interface declarations. 1182 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1183 Decl **Fields, unsigned NumFields, 1184 SourceLocation LBrac, SourceLocation RBrac, 1185 AttributeList *AttrList); 1186 1187 /// ActOnTagStartDefinition - Invoked when we have entered the 1188 /// scope of a tag's definition (e.g., for an enumeration, class, 1189 /// struct, or union). 1190 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1191 1192 void ActOnObjCContainerStartDefinition(Decl *IDecl); 1193 1194 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1195 /// C++ record definition's base-specifiers clause and are starting its 1196 /// member declarations. 1197 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1198 SourceLocation FinalLoc, 1199 SourceLocation LBraceLoc); 1200 1201 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1202 /// the definition of a tag (enumeration, class, struct, or union). 1203 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1204 SourceLocation RBraceLoc); 1205 1206 void ActOnObjCContainerFinishDefinition(); 1207 1208 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1209 /// error parsing the definition of a tag. 1210 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1211 1212 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1213 EnumConstantDecl *LastEnumConst, 1214 SourceLocation IdLoc, 1215 IdentifierInfo *Id, 1216 Expr *val); 1217 1218 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1219 SourceLocation IdLoc, IdentifierInfo *Id, 1220 AttributeList *Attrs, 1221 SourceLocation EqualLoc, Expr *Val); 1222 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1223 SourceLocation RBraceLoc, Decl *EnumDecl, 1224 Decl **Elements, unsigned NumElements, 1225 Scope *S, AttributeList *Attr); 1226 1227 DeclContext *getContainingDC(DeclContext *DC); 1228 1229 /// Set the current declaration context until it gets popped. 1230 void PushDeclContext(Scope *S, DeclContext *DC); 1231 void PopDeclContext(); 1232 1233 /// EnterDeclaratorContext - Used when we must lookup names in the context 1234 /// of a declarator's nested name specifier. 1235 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1236 void ExitDeclaratorContext(Scope *S); 1237 1238 DeclContext *getFunctionLevelDeclContext(); 1239 1240 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1241 /// to the function decl for the function being parsed. If we're currently 1242 /// in a 'block', this returns the containing context. 1243 FunctionDecl *getCurFunctionDecl(); 1244 1245 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1246 /// the method decl for the method being parsed. If we're currently 1247 /// in a 'block', this returns the containing context. 1248 ObjCMethodDecl *getCurMethodDecl(); 1249 1250 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1251 /// or C function we're in, otherwise return null. If we're currently 1252 /// in a 'block', this returns the containing context. 1253 NamedDecl *getCurFunctionOrMethodDecl(); 1254 1255 /// Add this decl to the scope shadowed decl chains. 1256 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1257 1258 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1259 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1260 /// true if 'D' belongs to the given declaration context. 1261 /// 1262 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1263 /// whether the declaration is in scope for the purposes of explicit template 1264 /// instantiation or specialization. The default is false. 1265 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1266 bool ExplicitInstantiationOrSpecialization = false); 1267 1268 /// Finds the scope corresponding to the given decl context, if it 1269 /// happens to be an enclosing scope. Otherwise return NULL. 1270 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1271 1272 /// Subroutines of ActOnDeclarator(). 1273 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1274 TypeSourceInfo *TInfo); 1275 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1276 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1277 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1278 void mergeObjCMethodDecls(ObjCMethodDecl *New, const ObjCMethodDecl *Old); 1279 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1280 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1281 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1282 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1283 1284 // AssignmentAction - This is used by all the assignment diagnostic functions 1285 // to represent what is actually causing the operation 1286 enum AssignmentAction { 1287 AA_Assigning, 1288 AA_Passing, 1289 AA_Returning, 1290 AA_Converting, 1291 AA_Initializing, 1292 AA_Sending, 1293 AA_Casting 1294 }; 1295 1296 /// C++ Overloading. 1297 enum OverloadKind { 1298 /// This is a legitimate overload: the existing declarations are 1299 /// functions or function templates with different signatures. 1300 Ovl_Overload, 1301 1302 /// This is not an overload because the signature exactly matches 1303 /// an existing declaration. 1304 Ovl_Match, 1305 1306 /// This is not an overload because the lookup results contain a 1307 /// non-function. 1308 Ovl_NonFunction 1309 }; 1310 OverloadKind CheckOverload(Scope *S, 1311 FunctionDecl *New, 1312 const LookupResult &OldDecls, 1313 NamedDecl *&OldDecl, 1314 bool IsForUsingDecl); 1315 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1316 1317 /// \brief Checks availability of the function depending on the current 1318 /// function context.Inside an unavailable function,unavailability is ignored. 1319 /// 1320 /// \returns true if \arg FD is unavailable and current context is inside 1321 /// an available function, false otherwise. 1322 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1323 1324 ImplicitConversionSequence 1325 TryImplicitConversion(Expr *From, QualType ToType, 1326 bool SuppressUserConversions, 1327 bool AllowExplicit, 1328 bool InOverloadResolution, 1329 bool CStyle, 1330 bool AllowObjCWritebackConversion); 1331 1332 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1333 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1334 bool IsComplexPromotion(QualType FromType, QualType ToType); 1335 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1336 bool InOverloadResolution, 1337 QualType& ConvertedType, bool &IncompatibleObjC); 1338 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1339 QualType& ConvertedType, bool &IncompatibleObjC); 1340 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1341 QualType &ConvertedType); 1342 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1343 QualType& ConvertedType); 1344 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1345 const FunctionProtoType *NewType); 1346 1347 bool CheckPointerConversion(Expr *From, QualType ToType, 1348 CastKind &Kind, 1349 CXXCastPath& BasePath, 1350 bool IgnoreBaseAccess); 1351 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1352 bool InOverloadResolution, 1353 QualType &ConvertedType); 1354 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1355 CastKind &Kind, 1356 CXXCastPath &BasePath, 1357 bool IgnoreBaseAccess); 1358 bool IsQualificationConversion(QualType FromType, QualType ToType, 1359 bool CStyle, bool &ObjCLifetimeConversion); 1360 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1361 QualType &ResultTy); 1362 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1363 1364 1365 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1366 const VarDecl *NRVOCandidate, 1367 QualType ResultType, 1368 Expr *Value, 1369 bool AllowNRVO = true); 1370 1371 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1372 ExprResult Init); 1373 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1374 SourceLocation EqualLoc, 1375 ExprResult Init, 1376 bool TopLevelOfInitList = false); 1377 ExprResult PerformObjectArgumentInitialization(Expr *From, 1378 NestedNameSpecifier *Qualifier, 1379 NamedDecl *FoundDecl, 1380 CXXMethodDecl *Method); 1381 1382 ExprResult PerformContextuallyConvertToBool(Expr *From); 1383 ExprResult PerformContextuallyConvertToObjCId(Expr *From); 1384 1385 ExprResult 1386 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1387 const PartialDiagnostic &NotIntDiag, 1388 const PartialDiagnostic &IncompleteDiag, 1389 const PartialDiagnostic &ExplicitConvDiag, 1390 const PartialDiagnostic &ExplicitConvNote, 1391 const PartialDiagnostic &AmbigDiag, 1392 const PartialDiagnostic &AmbigNote, 1393 const PartialDiagnostic &ConvDiag); 1394 1395 ExprResult PerformObjectMemberConversion(Expr *From, 1396 NestedNameSpecifier *Qualifier, 1397 NamedDecl *FoundDecl, 1398 NamedDecl *Member); 1399 1400 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1401 // TODO: make this is a typesafe union. 1402 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1403 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1404 1405 void AddOverloadCandidate(NamedDecl *Function, 1406 DeclAccessPair FoundDecl, 1407 Expr **Args, unsigned NumArgs, 1408 OverloadCandidateSet &CandidateSet); 1409 1410 void AddOverloadCandidate(FunctionDecl *Function, 1411 DeclAccessPair FoundDecl, 1412 Expr **Args, unsigned NumArgs, 1413 OverloadCandidateSet& CandidateSet, 1414 bool SuppressUserConversions = false, 1415 bool PartialOverloading = false); 1416 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1417 Expr **Args, unsigned NumArgs, 1418 OverloadCandidateSet& CandidateSet, 1419 bool SuppressUserConversions = false); 1420 void AddMethodCandidate(DeclAccessPair FoundDecl, 1421 QualType ObjectType, 1422 Expr::Classification ObjectClassification, 1423 Expr **Args, unsigned NumArgs, 1424 OverloadCandidateSet& CandidateSet, 1425 bool SuppressUserConversion = false); 1426 void AddMethodCandidate(CXXMethodDecl *Method, 1427 DeclAccessPair FoundDecl, 1428 CXXRecordDecl *ActingContext, QualType ObjectType, 1429 Expr::Classification ObjectClassification, 1430 Expr **Args, unsigned NumArgs, 1431 OverloadCandidateSet& CandidateSet, 1432 bool SuppressUserConversions = false); 1433 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1434 DeclAccessPair FoundDecl, 1435 CXXRecordDecl *ActingContext, 1436 TemplateArgumentListInfo *ExplicitTemplateArgs, 1437 QualType ObjectType, 1438 Expr::Classification ObjectClassification, 1439 Expr **Args, unsigned NumArgs, 1440 OverloadCandidateSet& CandidateSet, 1441 bool SuppressUserConversions = false); 1442 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1443 DeclAccessPair FoundDecl, 1444 TemplateArgumentListInfo *ExplicitTemplateArgs, 1445 Expr **Args, unsigned NumArgs, 1446 OverloadCandidateSet& CandidateSet, 1447 bool SuppressUserConversions = false); 1448 void AddConversionCandidate(CXXConversionDecl *Conversion, 1449 DeclAccessPair FoundDecl, 1450 CXXRecordDecl *ActingContext, 1451 Expr *From, QualType ToType, 1452 OverloadCandidateSet& CandidateSet); 1453 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1454 DeclAccessPair FoundDecl, 1455 CXXRecordDecl *ActingContext, 1456 Expr *From, QualType ToType, 1457 OverloadCandidateSet &CandidateSet); 1458 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1459 DeclAccessPair FoundDecl, 1460 CXXRecordDecl *ActingContext, 1461 const FunctionProtoType *Proto, 1462 Expr *Object, Expr **Args, unsigned NumArgs, 1463 OverloadCandidateSet& CandidateSet); 1464 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1465 SourceLocation OpLoc, 1466 Expr **Args, unsigned NumArgs, 1467 OverloadCandidateSet& CandidateSet, 1468 SourceRange OpRange = SourceRange()); 1469 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1470 Expr **Args, unsigned NumArgs, 1471 OverloadCandidateSet& CandidateSet, 1472 bool IsAssignmentOperator = false, 1473 unsigned NumContextualBoolArguments = 0); 1474 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1475 SourceLocation OpLoc, 1476 Expr **Args, unsigned NumArgs, 1477 OverloadCandidateSet& CandidateSet); 1478 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1479 bool Operator, 1480 Expr **Args, unsigned NumArgs, 1481 TemplateArgumentListInfo *ExplicitTemplateArgs, 1482 OverloadCandidateSet& CandidateSet, 1483 bool PartialOverloading = false, 1484 bool StdNamespaceIsAssociated = false); 1485 1486 // Emit as a 'note' the specific overload candidate 1487 void NoteOverloadCandidate(FunctionDecl *Fn); 1488 1489 // Emit as a series of 'note's all template and non-templates 1490 // identified by the expression Expr 1491 void NoteAllOverloadCandidates(Expr* E); 1492 1493 // [PossiblyAFunctionType] --> [Return] 1494 // NonFunctionType --> NonFunctionType 1495 // R (A) --> R(A) 1496 // R (*)(A) --> R (A) 1497 // R (&)(A) --> R (A) 1498 // R (S::*)(A) --> R (A) 1499 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1500 1501 FunctionDecl *ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, QualType TargetType, 1502 bool Complain, 1503 DeclAccessPair &Found); 1504 1505 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1506 bool Complain = false, 1507 DeclAccessPair* Found = 0); 1508 1509 ExprResult ResolveAndFixSingleFunctionTemplateSpecialization( 1510 Expr *SrcExpr, bool DoFunctionPointerConverion = false, 1511 bool Complain = false, 1512 const SourceRange& OpRangeForComplaining = SourceRange(), 1513 QualType DestTypeForComplaining = QualType(), 1514 unsigned DiagIDForComplaining = 0); 1515 1516 1517 Expr *FixOverloadedFunctionReference(Expr *E, 1518 DeclAccessPair FoundDecl, 1519 FunctionDecl *Fn); 1520 ExprResult FixOverloadedFunctionReference(ExprResult, 1521 DeclAccessPair FoundDecl, 1522 FunctionDecl *Fn); 1523 1524 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1525 Expr **Args, unsigned NumArgs, 1526 OverloadCandidateSet &CandidateSet, 1527 bool PartialOverloading = false); 1528 1529 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1530 UnresolvedLookupExpr *ULE, 1531 SourceLocation LParenLoc, 1532 Expr **Args, unsigned NumArgs, 1533 SourceLocation RParenLoc, 1534 Expr *ExecConfig); 1535 1536 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1537 unsigned Opc, 1538 const UnresolvedSetImpl &Fns, 1539 Expr *input); 1540 1541 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1542 unsigned Opc, 1543 const UnresolvedSetImpl &Fns, 1544 Expr *LHS, Expr *RHS); 1545 1546 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1547 SourceLocation RLoc, 1548 Expr *Base,Expr *Idx); 1549 1550 ExprResult 1551 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1552 SourceLocation LParenLoc, Expr **Args, 1553 unsigned NumArgs, SourceLocation RParenLoc); 1554 ExprResult 1555 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1556 Expr **Args, unsigned NumArgs, 1557 SourceLocation RParenLoc); 1558 1559 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1560 SourceLocation OpLoc); 1561 1562 /// CheckCallReturnType - Checks that a call expression's return type is 1563 /// complete. Returns true on failure. The location passed in is the location 1564 /// that best represents the call. 1565 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1566 CallExpr *CE, FunctionDecl *FD); 1567 1568 /// Helpers for dealing with blocks and functions. 1569 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1570 bool CheckParameterNames); 1571 void CheckCXXDefaultArguments(FunctionDecl *FD); 1572 void CheckExtraCXXDefaultArguments(Declarator &D); 1573 Scope *getNonFieldDeclScope(Scope *S); 1574 1575 /// \name Name lookup 1576 /// 1577 /// These routines provide name lookup that is used during semantic 1578 /// analysis to resolve the various kinds of names (identifiers, 1579 /// overloaded operator names, constructor names, etc.) into zero or 1580 /// more declarations within a particular scope. The major entry 1581 /// points are LookupName, which performs unqualified name lookup, 1582 /// and LookupQualifiedName, which performs qualified name lookup. 1583 /// 1584 /// All name lookup is performed based on some specific criteria, 1585 /// which specify what names will be visible to name lookup and how 1586 /// far name lookup should work. These criteria are important both 1587 /// for capturing language semantics (certain lookups will ignore 1588 /// certain names, for example) and for performance, since name 1589 /// lookup is often a bottleneck in the compilation of C++. Name 1590 /// lookup criteria is specified via the LookupCriteria enumeration. 1591 /// 1592 /// The results of name lookup can vary based on the kind of name 1593 /// lookup performed, the current language, and the translation 1594 /// unit. In C, for example, name lookup will either return nothing 1595 /// (no entity found) or a single declaration. In C++, name lookup 1596 /// can additionally refer to a set of overloaded functions or 1597 /// result in an ambiguity. All of the possible results of name 1598 /// lookup are captured by the LookupResult class, which provides 1599 /// the ability to distinguish among them. 1600 //@{ 1601 1602 /// @brief Describes the kind of name lookup to perform. 1603 enum LookupNameKind { 1604 /// Ordinary name lookup, which finds ordinary names (functions, 1605 /// variables, typedefs, etc.) in C and most kinds of names 1606 /// (functions, variables, members, types, etc.) in C++. 1607 LookupOrdinaryName = 0, 1608 /// Tag name lookup, which finds the names of enums, classes, 1609 /// structs, and unions. 1610 LookupTagName, 1611 /// Label name lookup. 1612 LookupLabel, 1613 /// Member name lookup, which finds the names of 1614 /// class/struct/union members. 1615 LookupMemberName, 1616 /// Look up of an operator name (e.g., operator+) for use with 1617 /// operator overloading. This lookup is similar to ordinary name 1618 /// lookup, but will ignore any declarations that are class members. 1619 LookupOperatorName, 1620 /// Look up of a name that precedes the '::' scope resolution 1621 /// operator in C++. This lookup completely ignores operator, object, 1622 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1623 LookupNestedNameSpecifierName, 1624 /// Look up a namespace name within a C++ using directive or 1625 /// namespace alias definition, ignoring non-namespace names (C++ 1626 /// [basic.lookup.udir]p1). 1627 LookupNamespaceName, 1628 /// Look up all declarations in a scope with the given name, 1629 /// including resolved using declarations. This is appropriate 1630 /// for checking redeclarations for a using declaration. 1631 LookupUsingDeclName, 1632 /// Look up an ordinary name that is going to be redeclared as a 1633 /// name with linkage. This lookup ignores any declarations that 1634 /// are outside of the current scope unless they have linkage. See 1635 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1636 LookupRedeclarationWithLinkage, 1637 /// Look up the name of an Objective-C protocol. 1638 LookupObjCProtocolName, 1639 /// Look up implicit 'self' parameter of an objective-c method. 1640 LookupObjCImplicitSelfParam, 1641 /// \brief Look up any declaration with any name. 1642 LookupAnyName 1643 }; 1644 1645 /// \brief Specifies whether (or how) name lookup is being performed for a 1646 /// redeclaration (vs. a reference). 1647 enum RedeclarationKind { 1648 /// \brief The lookup is a reference to this name that is not for the 1649 /// purpose of redeclaring the name. 1650 NotForRedeclaration = 0, 1651 /// \brief The lookup results will be used for redeclaration of a name, 1652 /// if an entity by that name already exists. 1653 ForRedeclaration 1654 }; 1655 1656private: 1657 bool CppLookupName(LookupResult &R, Scope *S); 1658 1659 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1660 CXXSpecialMember SM, 1661 bool ConstArg, 1662 bool VolatileArg, 1663 bool RValueThis, 1664 bool ConstThis, 1665 bool VolatileThis); 1666 1667 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1668 // 1669 // The boolean value will be true to indicate that the namespace was loaded 1670 // from an AST/PCH file, or false otherwise. 1671 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1672 1673 /// \brief Whether we have already loaded known namespaces from an extenal 1674 /// source. 1675 bool LoadedExternalKnownNamespaces; 1676 1677public: 1678 /// \brief Look up a name, looking for a single declaration. Return 1679 /// null if the results were absent, ambiguous, or overloaded. 1680 /// 1681 /// It is preferable to use the elaborated form and explicitly handle 1682 /// ambiguity and overloaded. 1683 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1684 SourceLocation Loc, 1685 LookupNameKind NameKind, 1686 RedeclarationKind Redecl 1687 = NotForRedeclaration); 1688 bool LookupName(LookupResult &R, Scope *S, 1689 bool AllowBuiltinCreation = false); 1690 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1691 bool InUnqualifiedLookup = false); 1692 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1693 bool AllowBuiltinCreation = false, 1694 bool EnteringContext = false); 1695 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1696 1697 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1698 QualType T1, QualType T2, 1699 UnresolvedSetImpl &Functions); 1700 1701 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1702 SourceLocation GnuLabelLoc = SourceLocation()); 1703 1704 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1705 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1706 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1707 unsigned Quals, 1708 bool *ConstParam = 0); 1709 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1710 bool RValueThis, unsigned ThisQuals, 1711 bool *ConstParam = 0); 1712 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class); 1713 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, bool RValueThis, 1714 unsigned ThisQuals); 1715 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1716 1717 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1718 Expr **Args, unsigned NumArgs, 1719 ADLResult &Functions, 1720 bool StdNamespaceIsAssociated = false); 1721 1722 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1723 VisibleDeclConsumer &Consumer, 1724 bool IncludeGlobalScope = true); 1725 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1726 VisibleDeclConsumer &Consumer, 1727 bool IncludeGlobalScope = true); 1728 1729 /// \brief The context in which typo-correction occurs. 1730 /// 1731 /// The typo-correction context affects which keywords (if any) are 1732 /// considered when trying to correct for typos. 1733 enum CorrectTypoContext { 1734 /// \brief An unknown context, where any keyword might be valid. 1735 CTC_Unknown, 1736 /// \brief A context where no keywords are used (e.g. we expect an actual 1737 /// name). 1738 CTC_NoKeywords, 1739 /// \brief A context where we're correcting a type name. 1740 CTC_Type, 1741 /// \brief An expression context. 1742 CTC_Expression, 1743 /// \brief A type cast, or anything else that can be followed by a '<'. 1744 CTC_CXXCasts, 1745 /// \brief A member lookup context. 1746 CTC_MemberLookup, 1747 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1748 CTC_ObjCIvarLookup, 1749 /// \brief An Objective-C property lookup context (e.g., self.prop). 1750 CTC_ObjCPropertyLookup, 1751 /// \brief The receiver of an Objective-C message send within an 1752 /// Objective-C method where 'super' is a valid keyword. 1753 CTC_ObjCMessageReceiver 1754 }; 1755 1756 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1757 Sema::LookupNameKind LookupKind, 1758 Scope *S, CXXScopeSpec *SS, 1759 DeclContext *MemberContext = NULL, 1760 bool EnteringContext = false, 1761 CorrectTypoContext CTC = CTC_Unknown, 1762 const ObjCObjectPointerType *OPT = NULL); 1763 1764 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1765 AssociatedNamespaceSet &AssociatedNamespaces, 1766 AssociatedClassSet &AssociatedClasses); 1767 1768 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1769 bool ConsiderLinkage, 1770 bool ExplicitInstantiationOrSpecialization); 1771 1772 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1773 //@} 1774 1775 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1776 SourceLocation IdLoc, 1777 bool TypoCorrection = false); 1778 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1779 Scope *S, bool ForRedeclaration, 1780 SourceLocation Loc); 1781 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1782 Scope *S); 1783 void AddKnownFunctionAttributes(FunctionDecl *FD); 1784 1785 // More parsing and symbol table subroutines. 1786 1787 // Decl attributes - this routine is the top level dispatcher. 1788 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1789 bool NonInheritable = true, bool Inheritable = true); 1790 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1791 bool NonInheritable = true, bool Inheritable = true); 1792 1793 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1794 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1795 bool CheckNoReturnAttr(const AttributeList &attr); 1796 1797 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1798 bool &IncompleteImpl, unsigned DiagID); 1799 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 1800 ObjCMethodDecl *MethodDecl, 1801 bool IsProtocolMethodDecl, 1802 bool IsDeclaration = false); 1803 1804 /// WarnExactTypedMethods - This routine issues a warning if method 1805 /// implementation declaration matches exactly that of its declaration. 1806 void WarnExactTypedMethods(ObjCMethodDecl *Method, 1807 ObjCMethodDecl *MethodDecl, 1808 bool IsProtocolMethodDecl); 1809 1810 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1811 ObjCInterfaceDecl *IDecl); 1812 1813 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1814 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap; 1815 1816 /// CheckProtocolMethodDefs - This routine checks unimplemented 1817 /// methods declared in protocol, and those referenced by it. 1818 /// \param IDecl - Used for checking for methods which may have been 1819 /// inherited. 1820 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1821 ObjCProtocolDecl *PDecl, 1822 bool& IncompleteImpl, 1823 const SelectorSet &InsMap, 1824 const SelectorSet &ClsMap, 1825 ObjCContainerDecl *CDecl); 1826 1827 /// CheckImplementationIvars - This routine checks if the instance variables 1828 /// listed in the implelementation match those listed in the interface. 1829 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1830 ObjCIvarDecl **Fields, unsigned nIvars, 1831 SourceLocation Loc); 1832 1833 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1834 /// remains unimplemented in the class or category @implementation. 1835 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1836 ObjCContainerDecl* IDecl, 1837 bool IncompleteImpl = false); 1838 1839 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1840 /// which must be implemented by this implementation. 1841 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1842 ObjCContainerDecl *CDecl, 1843 const SelectorSet &InsMap); 1844 1845 /// DefaultSynthesizeProperties - This routine default synthesizes all 1846 /// properties which must be synthesized in class's @implementation. 1847 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1848 ObjCInterfaceDecl *IDecl); 1849 void DefaultSynthesizeProperties(Scope *S, Decl *D); 1850 1851 /// CollectImmediateProperties - This routine collects all properties in 1852 /// the class and its conforming protocols; but not those it its super class. 1853 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1854 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1855 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1856 1857 1858 /// LookupPropertyDecl - Looks up a property in the current class and all 1859 /// its protocols. 1860 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1861 IdentifierInfo *II); 1862 1863 /// Called by ActOnProperty to handle @property declarations in 1864 //// class extensions. 1865 Decl *HandlePropertyInClassExtension(Scope *S, 1866 SourceLocation AtLoc, 1867 FieldDeclarator &FD, 1868 Selector GetterSel, 1869 Selector SetterSel, 1870 const bool isAssign, 1871 const bool isReadWrite, 1872 const unsigned Attributes, 1873 bool *isOverridingProperty, 1874 TypeSourceInfo *T, 1875 tok::ObjCKeywordKind MethodImplKind); 1876 1877 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1878 /// handle creating the ObjcPropertyDecl for a category or @interface. 1879 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1880 ObjCContainerDecl *CDecl, 1881 SourceLocation AtLoc, 1882 FieldDeclarator &FD, 1883 Selector GetterSel, 1884 Selector SetterSel, 1885 const bool isAssign, 1886 const bool isReadWrite, 1887 const unsigned Attributes, 1888 TypeSourceInfo *T, 1889 tok::ObjCKeywordKind MethodImplKind, 1890 DeclContext *lexicalDC = 0); 1891 1892 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1893 /// warning) when atomic property has one but not the other user-declared 1894 /// setter or getter. 1895 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1896 ObjCContainerDecl* IDecl); 1897 1898 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 1899 1900 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1901 1902 enum MethodMatchStrategy { 1903 MMS_loose, 1904 MMS_strict 1905 }; 1906 1907 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1908 /// true, or false, accordingly. 1909 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1910 const ObjCMethodDecl *PrevMethod, 1911 MethodMatchStrategy strategy = MMS_strict); 1912 1913 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1914 /// or protocol against those declared in their implementations. 1915 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1916 const SelectorSet &ClsMap, 1917 SelectorSet &InsMapSeen, 1918 SelectorSet &ClsMapSeen, 1919 ObjCImplDecl* IMPDecl, 1920 ObjCContainerDecl* IDecl, 1921 bool &IncompleteImpl, 1922 bool ImmediateClass, 1923 bool WarnExactMatch=false); 1924 1925 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in 1926 /// category matches with those implemented in its primary class and 1927 /// warns each time an exact match is found. 1928 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP); 1929 1930private: 1931 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1932 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1933 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1934 1935 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1936 /// optionally warns if there are multiple signatures. 1937 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1938 bool receiverIdOrClass, 1939 bool warn, bool instance); 1940 1941public: 1942 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1943 /// unit are added to a global pool. This allows us to efficiently associate 1944 /// a selector with a method declaraation for purposes of typechecking 1945 /// messages sent to "id" (where the class of the object is unknown). 1946 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1947 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1948 } 1949 1950 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1951 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1952 AddMethodToGlobalPool(Method, impl, /*instance*/false); 1953 } 1954 1955 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global 1956 /// pool. 1957 void AddAnyMethodToGlobalPool(Decl *D); 1958 1959 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 1960 /// there are multiple signatures. 1961 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 1962 bool receiverIdOrClass=false, 1963 bool warn=true) { 1964 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1965 warn, /*instance*/true); 1966 } 1967 1968 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 1969 /// there are multiple signatures. 1970 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 1971 bool receiverIdOrClass=false, 1972 bool warn=true) { 1973 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1974 warn, /*instance*/false); 1975 } 1976 1977 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 1978 /// implementation. 1979 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 1980 1981 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 1982 /// initialization. 1983 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 1984 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 1985 1986 //===--------------------------------------------------------------------===// 1987 // Statement Parsing Callbacks: SemaStmt.cpp. 1988public: 1989 class FullExprArg { 1990 public: 1991 FullExprArg(Sema &actions) : E(0) { } 1992 1993 // FIXME: The const_cast here is ugly. RValue references would make this 1994 // much nicer (or we could duplicate a bunch of the move semantics 1995 // emulation code from Ownership.h). 1996 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 1997 1998 ExprResult release() { 1999 return move(E); 2000 } 2001 2002 Expr *get() const { return E; } 2003 2004 Expr *operator->() { 2005 return E; 2006 } 2007 2008 private: 2009 // FIXME: No need to make the entire Sema class a friend when it's just 2010 // Sema::MakeFullExpr that needs access to the constructor below. 2011 friend class Sema; 2012 2013 explicit FullExprArg(Expr *expr) : E(expr) {} 2014 2015 Expr *E; 2016 }; 2017 2018 FullExprArg MakeFullExpr(Expr *Arg) { 2019 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 2020 } 2021 2022 StmtResult ActOnExprStmt(FullExprArg Expr); 2023 2024 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 2025 SourceLocation LeadingEmptyMacroLoc = SourceLocation()); 2026 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 2027 MultiStmtArg Elts, 2028 bool isStmtExpr); 2029 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2030 SourceLocation StartLoc, 2031 SourceLocation EndLoc); 2032 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2033 StmtResult ActOnForEachLValueExpr(Expr *E); 2034 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2035 SourceLocation DotDotDotLoc, Expr *RHSVal, 2036 SourceLocation ColonLoc); 2037 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2038 2039 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2040 SourceLocation ColonLoc, 2041 Stmt *SubStmt, Scope *CurScope); 2042 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2043 SourceLocation ColonLoc, Stmt *SubStmt); 2044 2045 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2046 FullExprArg CondVal, Decl *CondVar, 2047 Stmt *ThenVal, 2048 SourceLocation ElseLoc, Stmt *ElseVal); 2049 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2050 Expr *Cond, 2051 Decl *CondVar); 2052 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2053 Stmt *Switch, Stmt *Body); 2054 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2055 FullExprArg Cond, 2056 Decl *CondVar, Stmt *Body); 2057 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2058 SourceLocation WhileLoc, 2059 SourceLocation CondLParen, Expr *Cond, 2060 SourceLocation CondRParen); 2061 2062 StmtResult ActOnForStmt(SourceLocation ForLoc, 2063 SourceLocation LParenLoc, 2064 Stmt *First, FullExprArg Second, 2065 Decl *SecondVar, 2066 FullExprArg Third, 2067 SourceLocation RParenLoc, 2068 Stmt *Body); 2069 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc, 2070 Expr *collection); 2071 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2072 SourceLocation LParenLoc, 2073 Stmt *First, Expr *Second, 2074 SourceLocation RParenLoc, Stmt *Body); 2075 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2076 SourceLocation LParenLoc, Stmt *LoopVar, 2077 SourceLocation ColonLoc, Expr *Collection, 2078 SourceLocation RParenLoc); 2079 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2080 SourceLocation ColonLoc, 2081 Stmt *RangeDecl, Stmt *BeginEndDecl, 2082 Expr *Cond, Expr *Inc, 2083 Stmt *LoopVarDecl, 2084 SourceLocation RParenLoc); 2085 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2086 2087 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2088 SourceLocation LabelLoc, 2089 LabelDecl *TheDecl); 2090 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2091 SourceLocation StarLoc, 2092 Expr *DestExp); 2093 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2094 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2095 2096 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2097 bool AllowFunctionParameters); 2098 2099 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2100 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2101 2102 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2103 bool IsSimple, bool IsVolatile, 2104 unsigned NumOutputs, unsigned NumInputs, 2105 IdentifierInfo **Names, 2106 MultiExprArg Constraints, 2107 MultiExprArg Exprs, 2108 Expr *AsmString, 2109 MultiExprArg Clobbers, 2110 SourceLocation RParenLoc, 2111 bool MSAsm = false); 2112 2113 2114 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2115 SourceLocation StartLoc, 2116 SourceLocation IdLoc, IdentifierInfo *Id, 2117 bool Invalid = false); 2118 2119 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2120 2121 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2122 Decl *Parm, Stmt *Body); 2123 2124 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2125 2126 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2127 MultiStmtArg Catch, Stmt *Finally); 2128 2129 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2130 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2131 Scope *CurScope); 2132 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, 2133 Expr *operand); 2134 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2135 Expr *SynchExpr, 2136 Stmt *SynchBody); 2137 2138 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2139 2140 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2141 SourceLocation StartLoc, 2142 SourceLocation IdLoc, 2143 IdentifierInfo *Id); 2144 2145 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2146 2147 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2148 Decl *ExDecl, Stmt *HandlerBlock); 2149 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2150 MultiStmtArg Handlers); 2151 2152 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2153 SourceLocation TryLoc, 2154 Stmt *TryBlock, 2155 Stmt *Handler); 2156 2157 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2158 Expr *FilterExpr, 2159 Stmt *Block); 2160 2161 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2162 Stmt *Block); 2163 2164 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2165 2166 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2167 2168 /// \brief If it's a file scoped decl that must warn if not used, keep track 2169 /// of it. 2170 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2171 2172 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2173 /// whose result is unused, warn. 2174 void DiagnoseUnusedExprResult(const Stmt *S); 2175 void DiagnoseUnusedDecl(const NamedDecl *ND); 2176 2177 ParsingDeclState PushParsingDeclaration() { 2178 return DelayedDiagnostics.pushParsingDecl(); 2179 } 2180 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2181 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2182 } 2183 2184 typedef ProcessingContextState ParsingClassState; 2185 ParsingClassState PushParsingClass() { 2186 return DelayedDiagnostics.pushContext(); 2187 } 2188 void PopParsingClass(ParsingClassState state) { 2189 DelayedDiagnostics.popContext(state); 2190 } 2191 2192 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2193 SourceLocation Loc, 2194 const ObjCInterfaceDecl *UnknownObjCClass=0); 2195 2196 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2197 2198 bool makeUnavailableInSystemHeader(SourceLocation loc, 2199 StringRef message); 2200 2201 //===--------------------------------------------------------------------===// 2202 // Expression Parsing Callbacks: SemaExpr.cpp. 2203 2204 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2205 const ObjCInterfaceDecl *UnknownObjCClass=0); 2206 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2207 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2208 ObjCMethodDecl *Getter, 2209 SourceLocation Loc); 2210 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2211 Expr **Args, unsigned NumArgs); 2212 2213 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 2214 2215 void PopExpressionEvaluationContext(); 2216 2217 void DiscardCleanupsInEvaluationContext(); 2218 2219 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 2220 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2221 void MarkDeclarationsReferencedInExpr(Expr *E); 2222 2223 /// \brief Figure out if an expression could be turned into a call. 2224 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2225 UnresolvedSetImpl &NonTemplateOverloads); 2226 /// \brief Give notes for a set of overloads. 2227 void NoteOverloads(const UnresolvedSetImpl &Overloads, 2228 const SourceLocation FinalNoteLoc); 2229 2230 /// \brief Conditionally issue a diagnostic based on the current 2231 /// evaluation context. 2232 /// 2233 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2234 /// the function body is parsed, and then do a basic reachability analysis to 2235 /// determine if the statement is reachable. If it is unreachable, the 2236 /// diagnostic will not be emitted. 2237 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *stmt, 2238 const PartialDiagnostic &PD); 2239 2240 // Primary Expressions. 2241 SourceRange getExprRange(Expr *E) const; 2242 2243 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Name, 2244 bool HasTrailingLParen, bool IsAddressOfOperand); 2245 2246 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2247 TemplateArgumentListInfo &Buffer, 2248 DeclarationNameInfo &NameInfo, 2249 const TemplateArgumentListInfo *&TemplateArgs); 2250 2251 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2252 CorrectTypoContext CTC = CTC_Unknown, 2253 TemplateArgumentListInfo *ExplicitTemplateArgs = 0, 2254 Expr **Args = 0, unsigned NumArgs = 0); 2255 2256 ExprResult LookupInObjCMethod(LookupResult &R, Scope *S, IdentifierInfo *II, 2257 bool AllowBuiltinCreation=false); 2258 2259 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2260 const DeclarationNameInfo &NameInfo, 2261 bool isAddressOfOperand, 2262 const TemplateArgumentListInfo *TemplateArgs); 2263 2264 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2265 ExprValueKind VK, 2266 SourceLocation Loc, 2267 const CXXScopeSpec *SS = 0); 2268 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2269 ExprValueKind VK, 2270 const DeclarationNameInfo &NameInfo, 2271 const CXXScopeSpec *SS = 0); 2272 ExprResult 2273 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2274 SourceLocation nameLoc, 2275 IndirectFieldDecl *indirectField, 2276 Expr *baseObjectExpr = 0, 2277 SourceLocation opLoc = SourceLocation()); 2278 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2279 LookupResult &R, 2280 const TemplateArgumentListInfo *TemplateArgs); 2281 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2282 LookupResult &R, 2283 const TemplateArgumentListInfo *TemplateArgs, 2284 bool IsDefiniteInstance); 2285 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2286 const LookupResult &R, 2287 bool HasTrailingLParen); 2288 2289 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2290 const DeclarationNameInfo &NameInfo); 2291 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2292 const DeclarationNameInfo &NameInfo, 2293 const TemplateArgumentListInfo *TemplateArgs); 2294 2295 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2296 LookupResult &R, 2297 bool ADL); 2298 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2299 const DeclarationNameInfo &NameInfo, 2300 NamedDecl *D); 2301 2302 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2303 ExprResult ActOnNumericConstant(const Token &); 2304 ExprResult ActOnCharacterConstant(const Token &); 2305 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *Val); 2306 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2307 SourceLocation R, 2308 MultiExprArg Val); 2309 2310 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2311 /// fragments (e.g. "foo" "bar" L"baz"). 2312 ExprResult ActOnStringLiteral(const Token *Toks, unsigned NumToks); 2313 2314 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2315 SourceLocation DefaultLoc, 2316 SourceLocation RParenLoc, 2317 Expr *ControllingExpr, 2318 MultiTypeArg Types, 2319 MultiExprArg Exprs); 2320 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2321 SourceLocation DefaultLoc, 2322 SourceLocation RParenLoc, 2323 Expr *ControllingExpr, 2324 TypeSourceInfo **Types, 2325 Expr **Exprs, 2326 unsigned NumAssocs); 2327 2328 // Binary/Unary Operators. 'Tok' is the token for the operator. 2329 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2330 Expr *InputArg); 2331 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2332 UnaryOperatorKind Opc, Expr *input); 2333 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2334 tok::TokenKind Op, Expr *Input); 2335 2336 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *T, 2337 SourceLocation OpLoc, 2338 UnaryExprOrTypeTrait ExprKind, 2339 SourceRange R); 2340 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2341 UnaryExprOrTypeTrait ExprKind); 2342 ExprResult 2343 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2344 UnaryExprOrTypeTrait ExprKind, 2345 bool isType, void *TyOrEx, 2346 const SourceRange &ArgRange); 2347 2348 ExprResult CheckPlaceholderExpr(Expr *E); 2349 bool CheckVecStepExpr(Expr *E); 2350 2351 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2352 bool CheckUnaryExprOrTypeTraitOperand(QualType type, SourceLocation OpLoc, 2353 SourceRange R, 2354 UnaryExprOrTypeTrait ExprKind); 2355 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2356 SourceLocation OpLoc, 2357 IdentifierInfo &Name, 2358 SourceLocation NameLoc, 2359 SourceLocation RParenLoc); 2360 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2361 tok::TokenKind Kind, Expr *Input); 2362 2363 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2364 Expr *Idx, SourceLocation RLoc); 2365 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2366 Expr *Idx, SourceLocation RLoc); 2367 2368 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2369 SourceLocation OpLoc, bool IsArrow, 2370 CXXScopeSpec &SS, 2371 NamedDecl *FirstQualifierInScope, 2372 const DeclarationNameInfo &NameInfo, 2373 const TemplateArgumentListInfo *TemplateArgs); 2374 2375 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2376 SourceLocation OpLoc, bool IsArrow, 2377 const CXXScopeSpec &SS, 2378 NamedDecl *FirstQualifierInScope, 2379 LookupResult &R, 2380 const TemplateArgumentListInfo *TemplateArgs, 2381 bool SuppressQualifierCheck = false); 2382 2383 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2384 bool &IsArrow, SourceLocation OpLoc, 2385 CXXScopeSpec &SS, 2386 Decl *ObjCImpDecl, 2387 bool HasTemplateArgs); 2388 2389 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2390 const CXXScopeSpec &SS, 2391 const LookupResult &R); 2392 2393 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2394 bool IsArrow, SourceLocation OpLoc, 2395 const CXXScopeSpec &SS, 2396 NamedDecl *FirstQualifierInScope, 2397 const DeclarationNameInfo &NameInfo, 2398 const TemplateArgumentListInfo *TemplateArgs); 2399 2400 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2401 SourceLocation OpLoc, 2402 tok::TokenKind OpKind, 2403 CXXScopeSpec &SS, 2404 UnqualifiedId &Member, 2405 Decl *ObjCImpDecl, 2406 bool HasTrailingLParen); 2407 2408 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2409 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2410 FunctionDecl *FDecl, 2411 const FunctionProtoType *Proto, 2412 Expr **Args, unsigned NumArgs, 2413 SourceLocation RParenLoc); 2414 2415 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2416 /// This provides the location of the left/right parens and a list of comma 2417 /// locations. 2418 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2419 MultiExprArg Args, SourceLocation RParenLoc, 2420 Expr *ExecConfig = 0); 2421 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2422 SourceLocation LParenLoc, 2423 Expr **Args, unsigned NumArgs, 2424 SourceLocation RParenLoc, 2425 Expr *ExecConfig = 0); 2426 2427 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2428 MultiExprArg ExecConfig, SourceLocation GGGLoc); 2429 2430 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2431 Declarator &D, ParsedType &Ty, 2432 SourceLocation RParenLoc, Expr *Op); 2433 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2434 TypeSourceInfo *Ty, 2435 SourceLocation RParenLoc, 2436 Expr *Op); 2437 2438 /// \brief Build an altivec or OpenCL literal. 2439 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2440 SourceLocation RParenLoc, Expr *E, 2441 TypeSourceInfo *TInfo); 2442 2443 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2444 2445 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2446 ParsedType Ty, 2447 SourceLocation RParenLoc, 2448 Expr *Op); 2449 2450 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2451 TypeSourceInfo *TInfo, 2452 SourceLocation RParenLoc, 2453 Expr *InitExpr); 2454 2455 ExprResult ActOnInitList(SourceLocation LParenLoc, 2456 MultiExprArg InitList, 2457 SourceLocation RParenLoc); 2458 2459 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2460 SourceLocation Loc, 2461 bool GNUSyntax, 2462 ExprResult Init); 2463 2464 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2465 tok::TokenKind Kind, Expr *LHS, Expr *RHS); 2466 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2467 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2468 ExprResult CreateBuiltinBinOp(SourceLocation TokLoc, 2469 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2470 2471 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2472 /// in the case of a the GNU conditional expr extension. 2473 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2474 SourceLocation ColonLoc, 2475 Expr *Cond, Expr *LHS, Expr *RHS); 2476 2477 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2478 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2479 LabelDecl *LD); 2480 2481 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2482 SourceLocation RPLoc); // "({..})" 2483 2484 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2485 struct OffsetOfComponent { 2486 SourceLocation LocStart, LocEnd; 2487 bool isBrackets; // true if [expr], false if .ident 2488 union { 2489 IdentifierInfo *IdentInfo; 2490 ExprTy *E; 2491 } U; 2492 }; 2493 2494 /// __builtin_offsetof(type, a.b[123][456].c) 2495 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2496 TypeSourceInfo *TInfo, 2497 OffsetOfComponent *CompPtr, 2498 unsigned NumComponents, 2499 SourceLocation RParenLoc); 2500 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2501 SourceLocation BuiltinLoc, 2502 SourceLocation TypeLoc, 2503 ParsedType Arg1, 2504 OffsetOfComponent *CompPtr, 2505 unsigned NumComponents, 2506 SourceLocation RParenLoc); 2507 2508 // __builtin_choose_expr(constExpr, expr1, expr2) 2509 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2510 Expr *cond, Expr *expr1, 2511 Expr *expr2, SourceLocation RPLoc); 2512 2513 // __builtin_va_arg(expr, type) 2514 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, 2515 Expr *expr, ParsedType type, 2516 SourceLocation RPLoc); 2517 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, 2518 Expr *expr, TypeSourceInfo *TInfo, 2519 SourceLocation RPLoc); 2520 2521 // __null 2522 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2523 2524 bool CheckCaseExpression(Expr *expr); 2525 2526 bool CheckMicrosoftIfExistsSymbol(CXXScopeSpec &SS, UnqualifiedId &Name); 2527 2528 //===------------------------- "Block" Extension ------------------------===// 2529 2530 /// ActOnBlockStart - This callback is invoked when a block literal is 2531 /// started. 2532 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2533 2534 /// ActOnBlockArguments - This callback allows processing of block arguments. 2535 /// If there are no arguments, this is still invoked. 2536 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2537 2538 /// ActOnBlockError - If there is an error parsing a block, this callback 2539 /// is invoked to pop the information about the block from the action impl. 2540 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2541 2542 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2543 /// literal was successfully completed. ^(int x){...} 2544 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, 2545 Stmt *Body, Scope *CurScope); 2546 2547 //===---------------------------- OpenCL Features -----------------------===// 2548 2549 /// __builtin_astype(...) 2550 ExprResult ActOnAsTypeExpr(Expr *expr, ParsedType DestTy, 2551 SourceLocation BuiltinLoc, 2552 SourceLocation RParenLoc); 2553 2554 //===---------------------------- C++ Features --------------------------===// 2555 2556 // Act on C++ namespaces 2557 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2558 SourceLocation NamespaceLoc, 2559 SourceLocation IdentLoc, 2560 IdentifierInfo *Ident, 2561 SourceLocation LBrace, 2562 AttributeList *AttrList); 2563 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2564 2565 NamespaceDecl *getStdNamespace() const; 2566 NamespaceDecl *getOrCreateStdNamespace(); 2567 2568 CXXRecordDecl *getStdBadAlloc() const; 2569 2570 Decl *ActOnUsingDirective(Scope *CurScope, 2571 SourceLocation UsingLoc, 2572 SourceLocation NamespcLoc, 2573 CXXScopeSpec &SS, 2574 SourceLocation IdentLoc, 2575 IdentifierInfo *NamespcName, 2576 AttributeList *AttrList); 2577 2578 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2579 2580 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2581 SourceLocation NamespaceLoc, 2582 SourceLocation AliasLoc, 2583 IdentifierInfo *Alias, 2584 CXXScopeSpec &SS, 2585 SourceLocation IdentLoc, 2586 IdentifierInfo *Ident); 2587 2588 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2589 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2590 const LookupResult &PreviousDecls); 2591 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2592 NamedDecl *Target); 2593 2594 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2595 bool isTypeName, 2596 const CXXScopeSpec &SS, 2597 SourceLocation NameLoc, 2598 const LookupResult &Previous); 2599 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2600 const CXXScopeSpec &SS, 2601 SourceLocation NameLoc); 2602 2603 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2604 SourceLocation UsingLoc, 2605 CXXScopeSpec &SS, 2606 const DeclarationNameInfo &NameInfo, 2607 AttributeList *AttrList, 2608 bool IsInstantiation, 2609 bool IsTypeName, 2610 SourceLocation TypenameLoc); 2611 2612 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2613 2614 Decl *ActOnUsingDeclaration(Scope *CurScope, 2615 AccessSpecifier AS, 2616 bool HasUsingKeyword, 2617 SourceLocation UsingLoc, 2618 CXXScopeSpec &SS, 2619 UnqualifiedId &Name, 2620 AttributeList *AttrList, 2621 bool IsTypeName, 2622 SourceLocation TypenameLoc); 2623 Decl *ActOnAliasDeclaration(Scope *CurScope, 2624 AccessSpecifier AS, 2625 MultiTemplateParamsArg TemplateParams, 2626 SourceLocation UsingLoc, 2627 UnqualifiedId &Name, 2628 TypeResult Type); 2629 2630 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2631 /// ActOnDeclarator, when a C++ direct initializer is present. 2632 /// e.g: "int x(1);" 2633 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2634 SourceLocation LParenLoc, 2635 MultiExprArg Exprs, 2636 SourceLocation RParenLoc, 2637 bool TypeMayContainAuto); 2638 2639 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2640 /// and sets it as the initializer for the the passed in VarDecl. 2641 bool InitializeVarWithConstructor(VarDecl *VD, 2642 CXXConstructorDecl *Constructor, 2643 MultiExprArg Exprs); 2644 2645 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2646 /// including handling of its default argument expressions. 2647 /// 2648 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2649 ExprResult 2650 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2651 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2652 bool RequiresZeroInit, unsigned ConstructKind, 2653 SourceRange ParenRange); 2654 2655 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2656 // the constructor can be elidable? 2657 ExprResult 2658 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2659 CXXConstructorDecl *Constructor, bool Elidable, 2660 MultiExprArg Exprs, bool RequiresZeroInit, 2661 unsigned ConstructKind, 2662 SourceRange ParenRange); 2663 2664 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2665 /// the default expr if needed. 2666 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2667 FunctionDecl *FD, 2668 ParmVarDecl *Param); 2669 2670 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2671 /// constructed variable. 2672 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2673 2674 /// \brief Helper class that collects exception specifications for 2675 /// implicitly-declared special member functions. 2676 class ImplicitExceptionSpecification { 2677 // Pointer to allow copying 2678 ASTContext *Context; 2679 // We order exception specifications thus: 2680 // noexcept is the most restrictive, but is only used in C++0x. 2681 // throw() comes next. 2682 // Then a throw(collected exceptions) 2683 // Finally no specification. 2684 // throw(...) is used instead if any called function uses it. 2685 // 2686 // If this exception specification cannot be known yet (for instance, 2687 // because this is the exception specification for a defaulted default 2688 // constructor and we haven't finished parsing the deferred parts of the 2689 // class yet), the C++0x standard does not specify how to behave. We 2690 // record this as an 'unknown' exception specification, which overrules 2691 // any other specification (even 'none', to keep this rule simple). 2692 ExceptionSpecificationType ComputedEST; 2693 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2694 SmallVector<QualType, 4> Exceptions; 2695 2696 void ClearExceptions() { 2697 ExceptionsSeen.clear(); 2698 Exceptions.clear(); 2699 } 2700 2701 public: 2702 explicit ImplicitExceptionSpecification(ASTContext &Context) 2703 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2704 if (!Context.getLangOptions().CPlusPlus0x) 2705 ComputedEST = EST_DynamicNone; 2706 } 2707 2708 /// \brief Get the computed exception specification type. 2709 ExceptionSpecificationType getExceptionSpecType() const { 2710 assert(ComputedEST != EST_ComputedNoexcept && 2711 "noexcept(expr) should not be a possible result"); 2712 return ComputedEST; 2713 } 2714 2715 /// \brief The number of exceptions in the exception specification. 2716 unsigned size() const { return Exceptions.size(); } 2717 2718 /// \brief The set of exceptions in the exception specification. 2719 const QualType *data() const { return Exceptions.data(); } 2720 2721 /// \brief Integrate another called method into the collected data. 2722 void CalledDecl(CXXMethodDecl *Method); 2723 2724 /// \brief Integrate an invoked expression into the collected data. 2725 void CalledExpr(Expr *E); 2726 2727 /// \brief Specify that the exception specification can't be detemined yet. 2728 void SetDelayed() { 2729 ClearExceptions(); 2730 ComputedEST = EST_Delayed; 2731 } 2732 2733 FunctionProtoType::ExtProtoInfo getEPI() const { 2734 FunctionProtoType::ExtProtoInfo EPI; 2735 EPI.ExceptionSpecType = getExceptionSpecType(); 2736 EPI.NumExceptions = size(); 2737 EPI.Exceptions = data(); 2738 return EPI; 2739 } 2740 }; 2741 2742 /// \brief Determine what sort of exception specification a defaulted 2743 /// copy constructor of a class will have. 2744 ImplicitExceptionSpecification 2745 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2746 2747 /// \brief Determine what sort of exception specification a defaulted 2748 /// default constructor of a class will have, and whether the parameter 2749 /// will be const. 2750 std::pair<ImplicitExceptionSpecification, bool> 2751 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2752 2753 /// \brief Determine what sort of exception specification a defautled 2754 /// copy assignment operator of a class will have, and whether the 2755 /// parameter will be const. 2756 std::pair<ImplicitExceptionSpecification, bool> 2757 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2758 2759 /// \brief Determine what sort of exception specification a defaulted move 2760 /// constructor of a class will have. 2761 ImplicitExceptionSpecification 2762 ComputeDefaultedMoveCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2763 2764 /// \brief Determine what sort of exception specification a defaulted move 2765 /// assignment operator of a class will have. 2766 ImplicitExceptionSpecification 2767 ComputeDefaultedMoveAssignmentExceptionSpec(CXXRecordDecl *ClassDecl); 2768 2769 /// \brief Determine what sort of exception specification a defaulted 2770 /// destructor of a class will have. 2771 ImplicitExceptionSpecification 2772 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 2773 2774 /// \brief Determine if a defaulted default constructor ought to be 2775 /// deleted. 2776 bool ShouldDeleteDefaultConstructor(CXXConstructorDecl *CD); 2777 2778 /// \brief Determine if a defaulted copy constructor ought to be 2779 /// deleted. 2780 bool ShouldDeleteCopyConstructor(CXXConstructorDecl *CD); 2781 2782 /// \brief Determine if a defaulted copy assignment operator ought to be 2783 /// deleted. 2784 bool ShouldDeleteCopyAssignmentOperator(CXXMethodDecl *MD); 2785 2786 /// \brief Determine if a defaulted move constructor ought to be deleted. 2787 bool ShouldDeleteMoveConstructor(CXXConstructorDecl *CD); 2788 2789 /// \brief Determine if a defaulted move assignment operator ought to be 2790 /// deleted. 2791 bool ShouldDeleteMoveAssignmentOperator(CXXMethodDecl *MD); 2792 2793 /// \brief Determine if a defaulted destructor ought to be deleted. 2794 bool ShouldDeleteDestructor(CXXDestructorDecl *DD); 2795 2796 /// \brief Declare the implicit default constructor for the given class. 2797 /// 2798 /// \param ClassDecl The class declaration into which the implicit 2799 /// default constructor will be added. 2800 /// 2801 /// \returns The implicitly-declared default constructor. 2802 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2803 CXXRecordDecl *ClassDecl); 2804 2805 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2806 /// defining this constructor as the default constructor. 2807 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2808 CXXConstructorDecl *Constructor); 2809 2810 /// \brief Declare the implicit destructor for the given class. 2811 /// 2812 /// \param ClassDecl The class declaration into which the implicit 2813 /// destructor will be added. 2814 /// 2815 /// \returns The implicitly-declared destructor. 2816 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2817 2818 /// DefineImplicitDestructor - Checks for feasibility of 2819 /// defining this destructor as the default destructor. 2820 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2821 CXXDestructorDecl *Destructor); 2822 2823 /// \brief Build an exception spec for destructors that don't have one. 2824 /// 2825 /// C++11 says that user-defined destructors with no exception spec get one 2826 /// that looks as if the destructor was implicitly declared. 2827 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 2828 CXXDestructorDecl *Destructor); 2829 2830 /// \brief Declare all inherited constructors for the given class. 2831 /// 2832 /// \param ClassDecl The class declaration into which the inherited 2833 /// constructors will be added. 2834 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2835 2836 /// \brief Declare the implicit copy constructor for the given class. 2837 /// 2838 /// \param ClassDecl The class declaration into which the implicit 2839 /// copy constructor will be added. 2840 /// 2841 /// \returns The implicitly-declared copy constructor. 2842 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2843 2844 /// DefineImplicitCopyConstructor - Checks for feasibility of 2845 /// defining this constructor as the copy constructor. 2846 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2847 CXXConstructorDecl *Constructor); 2848 2849 /// \brief Declare the implicit move constructor for the given class. 2850 /// 2851 /// \param ClassDecl The Class declaration into which the implicit 2852 /// move constructor will be added. 2853 /// 2854 /// \returns The implicitly-declared move constructor, or NULL if it wasn't 2855 /// declared. 2856 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl); 2857 2858 /// DefineImplicitMoveConstructor - Checks for feasibility of 2859 /// defining this constructor as the move constructor. 2860 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation, 2861 CXXConstructorDecl *Constructor); 2862 2863 /// \brief Declare the implicit copy assignment operator for the given class. 2864 /// 2865 /// \param ClassDecl The class declaration into which the implicit 2866 /// copy assignment operator will be added. 2867 /// 2868 /// \returns The implicitly-declared copy assignment operator. 2869 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2870 2871 /// \brief Defines an implicitly-declared copy assignment operator. 2872 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2873 CXXMethodDecl *MethodDecl); 2874 2875 /// \brief Declare the implicit move assignment operator for the given class. 2876 /// 2877 /// \param ClassDecl The Class declaration into which the implicit 2878 /// move assignment operator will be added. 2879 /// 2880 /// \returns The implicitly-declared move assignment operator, or NULL if it 2881 /// wasn't declared. 2882 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl); 2883 2884 /// \brief Defines an implicitly-declared move assignment operator. 2885 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation, 2886 CXXMethodDecl *MethodDecl); 2887 2888 /// \brief Force the declaration of any implicitly-declared members of this 2889 /// class. 2890 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2891 2892 /// MaybeBindToTemporary - If the passed in expression has a record type with 2893 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 2894 /// it simply returns the passed in expression. 2895 ExprResult MaybeBindToTemporary(Expr *E); 2896 2897 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 2898 MultiExprArg ArgsPtr, 2899 SourceLocation Loc, 2900 ASTOwningVector<Expr*> &ConvertedArgs); 2901 2902 ParsedType getDestructorName(SourceLocation TildeLoc, 2903 IdentifierInfo &II, SourceLocation NameLoc, 2904 Scope *S, CXXScopeSpec &SS, 2905 ParsedType ObjectType, 2906 bool EnteringContext); 2907 2908 // Checks that reinterpret casts don't have undefined behavior. 2909 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 2910 bool IsDereference, SourceRange Range); 2911 2912 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 2913 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 2914 tok::TokenKind Kind, 2915 SourceLocation LAngleBracketLoc, 2916 Declarator &D, 2917 SourceLocation RAngleBracketLoc, 2918 SourceLocation LParenLoc, 2919 Expr *E, 2920 SourceLocation RParenLoc); 2921 2922 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 2923 tok::TokenKind Kind, 2924 TypeSourceInfo *Ty, 2925 Expr *E, 2926 SourceRange AngleBrackets, 2927 SourceRange Parens); 2928 2929 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2930 SourceLocation TypeidLoc, 2931 TypeSourceInfo *Operand, 2932 SourceLocation RParenLoc); 2933 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2934 SourceLocation TypeidLoc, 2935 Expr *Operand, 2936 SourceLocation RParenLoc); 2937 2938 /// ActOnCXXTypeid - Parse typeid( something ). 2939 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 2940 SourceLocation LParenLoc, bool isType, 2941 void *TyOrExpr, 2942 SourceLocation RParenLoc); 2943 2944 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2945 SourceLocation TypeidLoc, 2946 TypeSourceInfo *Operand, 2947 SourceLocation RParenLoc); 2948 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2949 SourceLocation TypeidLoc, 2950 Expr *Operand, 2951 SourceLocation RParenLoc); 2952 2953 /// ActOnCXXUuidof - Parse __uuidof( something ). 2954 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 2955 SourceLocation LParenLoc, bool isType, 2956 void *TyOrExpr, 2957 SourceLocation RParenLoc); 2958 2959 2960 //// ActOnCXXThis - Parse 'this' pointer. 2961 ExprResult ActOnCXXThis(SourceLocation loc); 2962 2963 /// getAndCaptureCurrentThisType - Try to capture a 'this' pointer. Returns 2964 /// the type of the 'this' pointer, or a null type if this is not possible. 2965 QualType getAndCaptureCurrentThisType(); 2966 2967 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 2968 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 2969 2970 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 2971 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 2972 2973 //// ActOnCXXThrow - Parse throw expressions. 2974 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 2975 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 2976 bool IsThrownVarInScope); 2977 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 2978 bool IsThrownVarInScope); 2979 2980 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 2981 /// Can be interpreted either as function-style casting ("int(x)") 2982 /// or class type construction ("ClassType(x,y,z)") 2983 /// or creation of a value-initialized type ("int()"). 2984 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 2985 SourceLocation LParenLoc, 2986 MultiExprArg Exprs, 2987 SourceLocation RParenLoc); 2988 2989 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 2990 SourceLocation LParenLoc, 2991 MultiExprArg Exprs, 2992 SourceLocation RParenLoc); 2993 2994 /// ActOnCXXNew - Parsed a C++ 'new' expression. 2995 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 2996 SourceLocation PlacementLParen, 2997 MultiExprArg PlacementArgs, 2998 SourceLocation PlacementRParen, 2999 SourceRange TypeIdParens, Declarator &D, 3000 SourceLocation ConstructorLParen, 3001 MultiExprArg ConstructorArgs, 3002 SourceLocation ConstructorRParen); 3003 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 3004 SourceLocation PlacementLParen, 3005 MultiExprArg PlacementArgs, 3006 SourceLocation PlacementRParen, 3007 SourceRange TypeIdParens, 3008 QualType AllocType, 3009 TypeSourceInfo *AllocTypeInfo, 3010 Expr *ArraySize, 3011 SourceLocation ConstructorLParen, 3012 MultiExprArg ConstructorArgs, 3013 SourceLocation ConstructorRParen, 3014 bool TypeMayContainAuto = true); 3015 3016 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 3017 SourceRange R); 3018 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 3019 bool UseGlobal, QualType AllocType, bool IsArray, 3020 Expr **PlaceArgs, unsigned NumPlaceArgs, 3021 FunctionDecl *&OperatorNew, 3022 FunctionDecl *&OperatorDelete); 3023 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 3024 DeclarationName Name, Expr** Args, 3025 unsigned NumArgs, DeclContext *Ctx, 3026 bool AllowMissing, FunctionDecl *&Operator, 3027 bool Diagnose = true); 3028 void DeclareGlobalNewDelete(); 3029 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 3030 QualType Argument, 3031 bool addMallocAttr = false); 3032 3033 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 3034 DeclarationName Name, FunctionDecl* &Operator, 3035 bool Diagnose = true); 3036 3037 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 3038 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 3039 bool UseGlobal, bool ArrayForm, 3040 Expr *Operand); 3041 3042 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 3043 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 3044 SourceLocation StmtLoc, 3045 bool ConvertToBoolean); 3046 3047 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 3048 Expr *Operand, SourceLocation RParen); 3049 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 3050 SourceLocation RParen); 3051 3052 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 3053 /// pseudo-functions. 3054 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 3055 SourceLocation KWLoc, 3056 ParsedType Ty, 3057 SourceLocation RParen); 3058 3059 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3060 SourceLocation KWLoc, 3061 TypeSourceInfo *T, 3062 SourceLocation RParen); 3063 3064 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3065 /// pseudo-functions. 3066 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3067 SourceLocation KWLoc, 3068 ParsedType LhsTy, 3069 ParsedType RhsTy, 3070 SourceLocation RParen); 3071 3072 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3073 SourceLocation KWLoc, 3074 TypeSourceInfo *LhsT, 3075 TypeSourceInfo *RhsT, 3076 SourceLocation RParen); 3077 3078 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3079 /// pseudo-functions. 3080 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3081 SourceLocation KWLoc, 3082 ParsedType LhsTy, 3083 Expr *DimExpr, 3084 SourceLocation RParen); 3085 3086 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3087 SourceLocation KWLoc, 3088 TypeSourceInfo *TSInfo, 3089 Expr *DimExpr, 3090 SourceLocation RParen); 3091 3092 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3093 /// pseudo-functions. 3094 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3095 SourceLocation KWLoc, 3096 Expr *Queried, 3097 SourceLocation RParen); 3098 3099 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3100 SourceLocation KWLoc, 3101 Expr *Queried, 3102 SourceLocation RParen); 3103 3104 ExprResult ActOnStartCXXMemberReference(Scope *S, 3105 Expr *Base, 3106 SourceLocation OpLoc, 3107 tok::TokenKind OpKind, 3108 ParsedType &ObjectType, 3109 bool &MayBePseudoDestructor); 3110 3111 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3112 3113 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3114 SourceLocation OpLoc, 3115 tok::TokenKind OpKind, 3116 const CXXScopeSpec &SS, 3117 TypeSourceInfo *ScopeType, 3118 SourceLocation CCLoc, 3119 SourceLocation TildeLoc, 3120 PseudoDestructorTypeStorage DestroyedType, 3121 bool HasTrailingLParen); 3122 3123 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3124 SourceLocation OpLoc, 3125 tok::TokenKind OpKind, 3126 CXXScopeSpec &SS, 3127 UnqualifiedId &FirstTypeName, 3128 SourceLocation CCLoc, 3129 SourceLocation TildeLoc, 3130 UnqualifiedId &SecondTypeName, 3131 bool HasTrailingLParen); 3132 3133 /// MaybeCreateExprWithCleanups - If the current full-expression 3134 /// requires any cleanups, surround it with a ExprWithCleanups node. 3135 /// Otherwise, just returns the passed-in expression. 3136 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3137 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3138 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3139 3140 ExprResult ActOnFinishFullExpr(Expr *Expr); 3141 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3142 3143 // Marks SS invalid if it represents an incomplete type. 3144 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3145 3146 DeclContext *computeDeclContext(QualType T); 3147 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3148 bool EnteringContext = false); 3149 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3150 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3151 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3152 3153 /// \brief The parser has parsed a global nested-name-specifier '::'. 3154 /// 3155 /// \param S The scope in which this nested-name-specifier occurs. 3156 /// 3157 /// \param CCLoc The location of the '::'. 3158 /// 3159 /// \param SS The nested-name-specifier, which will be updated in-place 3160 /// to reflect the parsed nested-name-specifier. 3161 /// 3162 /// \returns true if an error occurred, false otherwise. 3163 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3164 CXXScopeSpec &SS); 3165 3166 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3167 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3168 3169 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3170 SourceLocation IdLoc, 3171 IdentifierInfo &II, 3172 ParsedType ObjectType); 3173 3174 bool BuildCXXNestedNameSpecifier(Scope *S, 3175 IdentifierInfo &Identifier, 3176 SourceLocation IdentifierLoc, 3177 SourceLocation CCLoc, 3178 QualType ObjectType, 3179 bool EnteringContext, 3180 CXXScopeSpec &SS, 3181 NamedDecl *ScopeLookupResult, 3182 bool ErrorRecoveryLookup); 3183 3184 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3185 /// 3186 /// \param S The scope in which this nested-name-specifier occurs. 3187 /// 3188 /// \param Identifier The identifier preceding the '::'. 3189 /// 3190 /// \param IdentifierLoc The location of the identifier. 3191 /// 3192 /// \param CCLoc The location of the '::'. 3193 /// 3194 /// \param ObjectType The type of the object, if we're parsing 3195 /// nested-name-specifier in a member access expression. 3196 /// 3197 /// \param EnteringContext Whether we're entering the context nominated by 3198 /// this nested-name-specifier. 3199 /// 3200 /// \param SS The nested-name-specifier, which is both an input 3201 /// parameter (the nested-name-specifier before this type) and an 3202 /// output parameter (containing the full nested-name-specifier, 3203 /// including this new type). 3204 /// 3205 /// \returns true if an error occurred, false otherwise. 3206 bool ActOnCXXNestedNameSpecifier(Scope *S, 3207 IdentifierInfo &Identifier, 3208 SourceLocation IdentifierLoc, 3209 SourceLocation CCLoc, 3210 ParsedType ObjectType, 3211 bool EnteringContext, 3212 CXXScopeSpec &SS); 3213 3214 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3215 IdentifierInfo &Identifier, 3216 SourceLocation IdentifierLoc, 3217 SourceLocation ColonLoc, 3218 ParsedType ObjectType, 3219 bool EnteringContext); 3220 3221 /// \brief The parser has parsed a nested-name-specifier 3222 /// 'template[opt] template-name < template-args >::'. 3223 /// 3224 /// \param S The scope in which this nested-name-specifier occurs. 3225 /// 3226 /// \param TemplateLoc The location of the 'template' keyword, if any. 3227 /// 3228 /// \param SS The nested-name-specifier, which is both an input 3229 /// parameter (the nested-name-specifier before this type) and an 3230 /// output parameter (containing the full nested-name-specifier, 3231 /// including this new type). 3232 /// 3233 /// \param TemplateLoc the location of the 'template' keyword, if any. 3234 /// \param TemplateName The template name. 3235 /// \param TemplateNameLoc The location of the template name. 3236 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3237 /// \param TemplateArgs The template arguments. 3238 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3239 /// \param CCLoc The location of the '::'. 3240 3241 /// \param EnteringContext Whether we're entering the context of the 3242 /// nested-name-specifier. 3243 /// 3244 /// 3245 /// \returns true if an error occurred, false otherwise. 3246 bool ActOnCXXNestedNameSpecifier(Scope *S, 3247 SourceLocation TemplateLoc, 3248 CXXScopeSpec &SS, 3249 TemplateTy Template, 3250 SourceLocation TemplateNameLoc, 3251 SourceLocation LAngleLoc, 3252 ASTTemplateArgsPtr TemplateArgs, 3253 SourceLocation RAngleLoc, 3254 SourceLocation CCLoc, 3255 bool EnteringContext); 3256 3257 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3258 /// that the parser can use later to reconstruct the given 3259 /// nested-name-specifier. 3260 /// 3261 /// \param SS A nested-name-specifier. 3262 /// 3263 /// \returns A pointer containing all of the information in the 3264 /// nested-name-specifier \p SS. 3265 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3266 3267 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3268 /// the nested-name-specifier structure. 3269 /// 3270 /// \param Annotation The annotation pointer, produced by 3271 /// \c SaveNestedNameSpecifierAnnotation(). 3272 /// 3273 /// \param AnnotationRange The source range corresponding to the annotation. 3274 /// 3275 /// \param SS The nested-name-specifier that will be updated with the contents 3276 /// of the annotation pointer. 3277 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3278 SourceRange AnnotationRange, 3279 CXXScopeSpec &SS); 3280 3281 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3282 3283 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3284 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3285 /// After this method is called, according to [C++ 3.4.3p3], names should be 3286 /// looked up in the declarator-id's scope, until the declarator is parsed and 3287 /// ActOnCXXExitDeclaratorScope is called. 3288 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3289 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3290 3291 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3292 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3293 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3294 /// Used to indicate that names should revert to being looked up in the 3295 /// defining scope. 3296 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3297 3298 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3299 /// initializer for the declaration 'Dcl'. 3300 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3301 /// static data member of class X, names should be looked up in the scope of 3302 /// class X. 3303 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3304 3305 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3306 /// initializer for the declaration 'Dcl'. 3307 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3308 3309 // ParseObjCStringLiteral - Parse Objective-C string literals. 3310 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3311 Expr **Strings, 3312 unsigned NumStrings); 3313 3314 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3315 TypeSourceInfo *EncodedTypeInfo, 3316 SourceLocation RParenLoc); 3317 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3318 CXXMethodDecl *Method); 3319 3320 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3321 SourceLocation EncodeLoc, 3322 SourceLocation LParenLoc, 3323 ParsedType Ty, 3324 SourceLocation RParenLoc); 3325 3326 // ParseObjCSelectorExpression - Build selector expression for @selector 3327 ExprResult ParseObjCSelectorExpression(Selector Sel, 3328 SourceLocation AtLoc, 3329 SourceLocation SelLoc, 3330 SourceLocation LParenLoc, 3331 SourceLocation RParenLoc); 3332 3333 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3334 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3335 SourceLocation AtLoc, 3336 SourceLocation ProtoLoc, 3337 SourceLocation LParenLoc, 3338 SourceLocation RParenLoc); 3339 3340 //===--------------------------------------------------------------------===// 3341 // C++ Declarations 3342 // 3343 Decl *ActOnStartLinkageSpecification(Scope *S, 3344 SourceLocation ExternLoc, 3345 SourceLocation LangLoc, 3346 StringRef Lang, 3347 SourceLocation LBraceLoc); 3348 Decl *ActOnFinishLinkageSpecification(Scope *S, 3349 Decl *LinkageSpec, 3350 SourceLocation RBraceLoc); 3351 3352 3353 //===--------------------------------------------------------------------===// 3354 // C++ Classes 3355 // 3356 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3357 const CXXScopeSpec *SS = 0); 3358 3359 Decl *ActOnAccessSpecifier(AccessSpecifier Access, 3360 SourceLocation ASLoc, 3361 SourceLocation ColonLoc); 3362 3363 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3364 Declarator &D, 3365 MultiTemplateParamsArg TemplateParameterLists, 3366 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3367 Expr *Init, bool HasDeferredInit, 3368 bool IsDefinition); 3369 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3370 Expr *Init); 3371 3372 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3373 Scope *S, 3374 CXXScopeSpec &SS, 3375 IdentifierInfo *MemberOrBase, 3376 ParsedType TemplateTypeTy, 3377 SourceLocation IdLoc, 3378 SourceLocation LParenLoc, 3379 Expr **Args, unsigned NumArgs, 3380 SourceLocation RParenLoc, 3381 SourceLocation EllipsisLoc); 3382 3383 MemInitResult BuildMemberInitializer(ValueDecl *Member, Expr **Args, 3384 unsigned NumArgs, SourceLocation IdLoc, 3385 SourceLocation LParenLoc, 3386 SourceLocation RParenLoc); 3387 3388 MemInitResult BuildBaseInitializer(QualType BaseType, 3389 TypeSourceInfo *BaseTInfo, 3390 Expr **Args, unsigned NumArgs, 3391 SourceLocation LParenLoc, 3392 SourceLocation RParenLoc, 3393 CXXRecordDecl *ClassDecl, 3394 SourceLocation EllipsisLoc); 3395 3396 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3397 Expr **Args, unsigned NumArgs, 3398 SourceLocation BaseLoc, 3399 SourceLocation RParenLoc, 3400 SourceLocation LParenLoc, 3401 CXXRecordDecl *ClassDecl); 3402 3403 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3404 CXXCtorInitializer *Initializer); 3405 3406 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3407 CXXCtorInitializer **Initializers, 3408 unsigned NumInitializers, bool AnyErrors); 3409 3410 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3411 3412 3413 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3414 /// mark all the non-trivial destructors of its members and bases as 3415 /// referenced. 3416 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3417 CXXRecordDecl *Record); 3418 3419 /// \brief The list of classes whose vtables have been used within 3420 /// this translation unit, and the source locations at which the 3421 /// first use occurred. 3422 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3423 3424 /// \brief The list of vtables that are required but have not yet been 3425 /// materialized. 3426 SmallVector<VTableUse, 16> VTableUses; 3427 3428 /// \brief The set of classes whose vtables have been used within 3429 /// this translation unit, and a bit that will be true if the vtable is 3430 /// required to be emitted (otherwise, it should be emitted only if needed 3431 /// by code generation). 3432 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3433 3434 /// \brief Load any externally-stored vtable uses. 3435 void LoadExternalVTableUses(); 3436 3437 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 3438 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 3439 DynamicClassesType; 3440 3441 /// \brief A list of all of the dynamic classes in this translation 3442 /// unit. 3443 DynamicClassesType DynamicClasses; 3444 3445 /// \brief Note that the vtable for the given class was used at the 3446 /// given location. 3447 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3448 bool DefinitionRequired = false); 3449 3450 /// MarkVirtualMembersReferenced - Will mark all members of the given 3451 /// CXXRecordDecl referenced. 3452 void MarkVirtualMembersReferenced(SourceLocation Loc, 3453 const CXXRecordDecl *RD); 3454 3455 /// \brief Define all of the vtables that have been used in this 3456 /// translation unit and reference any virtual members used by those 3457 /// vtables. 3458 /// 3459 /// \returns true if any work was done, false otherwise. 3460 bool DefineUsedVTables(); 3461 3462 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3463 3464 void ActOnMemInitializers(Decl *ConstructorDecl, 3465 SourceLocation ColonLoc, 3466 MemInitTy **MemInits, unsigned NumMemInits, 3467 bool AnyErrors); 3468 3469 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3470 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3471 Decl *TagDecl, 3472 SourceLocation LBrac, 3473 SourceLocation RBrac, 3474 AttributeList *AttrList); 3475 3476 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3477 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3478 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3479 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3480 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3481 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3482 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3483 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3484 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3485 bool IsInsideALocalClassWithinATemplateFunction(); 3486 3487 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3488 Expr *AssertExpr, 3489 Expr *AssertMessageExpr, 3490 SourceLocation RParenLoc); 3491 3492 FriendDecl *CheckFriendTypeDecl(SourceLocation FriendLoc, 3493 TypeSourceInfo *TSInfo); 3494 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3495 MultiTemplateParamsArg TemplateParams); 3496 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, bool IsDefinition, 3497 MultiTemplateParamsArg TemplateParams); 3498 3499 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3500 StorageClass& SC); 3501 void CheckConstructor(CXXConstructorDecl *Constructor); 3502 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3503 StorageClass& SC); 3504 bool CheckDestructor(CXXDestructorDecl *Destructor); 3505 void CheckConversionDeclarator(Declarator &D, QualType &R, 3506 StorageClass& SC); 3507 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3508 3509 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3510 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3511 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3512 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3513 void CheckExplicitlyDefaultedMoveConstructor(CXXConstructorDecl *Ctor); 3514 void CheckExplicitlyDefaultedMoveAssignment(CXXMethodDecl *Method); 3515 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3516 3517 //===--------------------------------------------------------------------===// 3518 // C++ Derived Classes 3519 // 3520 3521 /// ActOnBaseSpecifier - Parsed a base specifier 3522 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3523 SourceRange SpecifierRange, 3524 bool Virtual, AccessSpecifier Access, 3525 TypeSourceInfo *TInfo, 3526 SourceLocation EllipsisLoc); 3527 3528 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3529 SourceRange SpecifierRange, 3530 bool Virtual, AccessSpecifier Access, 3531 ParsedType basetype, 3532 SourceLocation BaseLoc, 3533 SourceLocation EllipsisLoc); 3534 3535 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3536 unsigned NumBases); 3537 void ActOnBaseSpecifiers(Decl *ClassDecl, BaseTy **Bases, unsigned NumBases); 3538 3539 bool IsDerivedFrom(QualType Derived, QualType Base); 3540 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3541 3542 // FIXME: I don't like this name. 3543 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3544 3545 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3546 3547 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3548 SourceLocation Loc, SourceRange Range, 3549 CXXCastPath *BasePath = 0, 3550 bool IgnoreAccess = false); 3551 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3552 unsigned InaccessibleBaseID, 3553 unsigned AmbigiousBaseConvID, 3554 SourceLocation Loc, SourceRange Range, 3555 DeclarationName Name, 3556 CXXCastPath *BasePath); 3557 3558 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3559 3560 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3561 /// covariant, according to C++ [class.virtual]p5. 3562 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3563 const CXXMethodDecl *Old); 3564 3565 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3566 /// spec is a subset of base spec. 3567 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3568 const CXXMethodDecl *Old); 3569 3570 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3571 3572 /// CheckOverrideControl - Check C++0x override control semantics. 3573 void CheckOverrideControl(const Decl *D); 3574 3575 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3576 /// overrides a virtual member function marked 'final', according to 3577 /// C++0x [class.virtual]p3. 3578 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3579 const CXXMethodDecl *Old); 3580 3581 3582 //===--------------------------------------------------------------------===// 3583 // C++ Access Control 3584 // 3585 3586 enum AccessResult { 3587 AR_accessible, 3588 AR_inaccessible, 3589 AR_dependent, 3590 AR_delayed 3591 }; 3592 3593 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3594 NamedDecl *PrevMemberDecl, 3595 AccessSpecifier LexicalAS); 3596 3597 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3598 DeclAccessPair FoundDecl); 3599 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3600 DeclAccessPair FoundDecl); 3601 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3602 SourceRange PlacementRange, 3603 CXXRecordDecl *NamingClass, 3604 DeclAccessPair FoundDecl, 3605 bool Diagnose = true); 3606 AccessResult CheckConstructorAccess(SourceLocation Loc, 3607 CXXConstructorDecl *D, 3608 const InitializedEntity &Entity, 3609 AccessSpecifier Access, 3610 bool IsCopyBindingRefToTemp = false); 3611 AccessResult CheckConstructorAccess(SourceLocation Loc, 3612 CXXConstructorDecl *D, 3613 AccessSpecifier Access, 3614 PartialDiagnostic PD); 3615 AccessResult CheckDestructorAccess(SourceLocation Loc, 3616 CXXDestructorDecl *Dtor, 3617 const PartialDiagnostic &PDiag); 3618 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3619 NamedDecl *D, 3620 const PartialDiagnostic &PDiag); 3621 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3622 Expr *ObjectExpr, 3623 Expr *ArgExpr, 3624 DeclAccessPair FoundDecl); 3625 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3626 DeclAccessPair FoundDecl); 3627 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3628 QualType Base, QualType Derived, 3629 const CXXBasePath &Path, 3630 unsigned DiagID, 3631 bool ForceCheck = false, 3632 bool ForceUnprivileged = false); 3633 void CheckLookupAccess(const LookupResult &R); 3634 3635 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3636 const MultiLevelTemplateArgumentList &TemplateArgs); 3637 void PerformDependentDiagnostics(const DeclContext *Pattern, 3638 const MultiLevelTemplateArgumentList &TemplateArgs); 3639 3640 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3641 3642 /// A flag to suppress access checking. 3643 bool SuppressAccessChecking; 3644 3645 /// \brief When true, access checking violations are treated as SFINAE 3646 /// failures rather than hard errors. 3647 bool AccessCheckingSFINAE; 3648 3649 void ActOnStartSuppressingAccessChecks(); 3650 void ActOnStopSuppressingAccessChecks(); 3651 3652 enum AbstractDiagSelID { 3653 AbstractNone = -1, 3654 AbstractReturnType, 3655 AbstractParamType, 3656 AbstractVariableType, 3657 AbstractFieldType, 3658 AbstractArrayType 3659 }; 3660 3661 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3662 const PartialDiagnostic &PD); 3663 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3664 3665 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3666 AbstractDiagSelID SelID = AbstractNone); 3667 3668 //===--------------------------------------------------------------------===// 3669 // C++ Overloaded Operators [C++ 13.5] 3670 // 3671 3672 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3673 3674 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3675 3676 //===--------------------------------------------------------------------===// 3677 // C++ Templates [C++ 14] 3678 // 3679 void FilterAcceptableTemplateNames(LookupResult &R); 3680 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3681 3682 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3683 QualType ObjectType, bool EnteringContext, 3684 bool &MemberOfUnknownSpecialization); 3685 3686 TemplateNameKind isTemplateName(Scope *S, 3687 CXXScopeSpec &SS, 3688 bool hasTemplateKeyword, 3689 UnqualifiedId &Name, 3690 ParsedType ObjectType, 3691 bool EnteringContext, 3692 TemplateTy &Template, 3693 bool &MemberOfUnknownSpecialization); 3694 3695 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3696 SourceLocation IILoc, 3697 Scope *S, 3698 const CXXScopeSpec *SS, 3699 TemplateTy &SuggestedTemplate, 3700 TemplateNameKind &SuggestedKind); 3701 3702 bool DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3703 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3704 3705 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3706 SourceLocation EllipsisLoc, 3707 SourceLocation KeyLoc, 3708 IdentifierInfo *ParamName, 3709 SourceLocation ParamNameLoc, 3710 unsigned Depth, unsigned Position, 3711 SourceLocation EqualLoc, 3712 ParsedType DefaultArg); 3713 3714 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3715 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3716 unsigned Depth, 3717 unsigned Position, 3718 SourceLocation EqualLoc, 3719 Expr *DefaultArg); 3720 Decl *ActOnTemplateTemplateParameter(Scope *S, 3721 SourceLocation TmpLoc, 3722 TemplateParamsTy *Params, 3723 SourceLocation EllipsisLoc, 3724 IdentifierInfo *ParamName, 3725 SourceLocation ParamNameLoc, 3726 unsigned Depth, 3727 unsigned Position, 3728 SourceLocation EqualLoc, 3729 ParsedTemplateArgument DefaultArg); 3730 3731 TemplateParamsTy * 3732 ActOnTemplateParameterList(unsigned Depth, 3733 SourceLocation ExportLoc, 3734 SourceLocation TemplateLoc, 3735 SourceLocation LAngleLoc, 3736 Decl **Params, unsigned NumParams, 3737 SourceLocation RAngleLoc); 3738 3739 /// \brief The context in which we are checking a template parameter 3740 /// list. 3741 enum TemplateParamListContext { 3742 TPC_ClassTemplate, 3743 TPC_FunctionTemplate, 3744 TPC_ClassTemplateMember, 3745 TPC_FriendFunctionTemplate, 3746 TPC_FriendFunctionTemplateDefinition, 3747 TPC_TypeAliasTemplate 3748 }; 3749 3750 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3751 TemplateParameterList *OldParams, 3752 TemplateParamListContext TPC); 3753 TemplateParameterList * 3754 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3755 SourceLocation DeclLoc, 3756 const CXXScopeSpec &SS, 3757 TemplateParameterList **ParamLists, 3758 unsigned NumParamLists, 3759 bool IsFriend, 3760 bool &IsExplicitSpecialization, 3761 bool &Invalid); 3762 3763 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3764 SourceLocation KWLoc, CXXScopeSpec &SS, 3765 IdentifierInfo *Name, SourceLocation NameLoc, 3766 AttributeList *Attr, 3767 TemplateParameterList *TemplateParams, 3768 AccessSpecifier AS, 3769 unsigned NumOuterTemplateParamLists, 3770 TemplateParameterList **OuterTemplateParamLists); 3771 3772 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3773 TemplateArgumentListInfo &Out); 3774 3775 void NoteAllFoundTemplates(TemplateName Name); 3776 3777 QualType CheckTemplateIdType(TemplateName Template, 3778 SourceLocation TemplateLoc, 3779 TemplateArgumentListInfo &TemplateArgs); 3780 3781 TypeResult 3782 ActOnTemplateIdType(CXXScopeSpec &SS, 3783 TemplateTy Template, SourceLocation TemplateLoc, 3784 SourceLocation LAngleLoc, 3785 ASTTemplateArgsPtr TemplateArgs, 3786 SourceLocation RAngleLoc); 3787 3788 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3789 /// such as \c class T::template apply<U>. 3790 /// 3791 /// \param TUK 3792 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3793 TypeSpecifierType TagSpec, 3794 SourceLocation TagLoc, 3795 CXXScopeSpec &SS, 3796 TemplateTy TemplateD, 3797 SourceLocation TemplateLoc, 3798 SourceLocation LAngleLoc, 3799 ASTTemplateArgsPtr TemplateArgsIn, 3800 SourceLocation RAngleLoc); 3801 3802 3803 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3804 LookupResult &R, 3805 bool RequiresADL, 3806 const TemplateArgumentListInfo &TemplateArgs); 3807 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3808 const DeclarationNameInfo &NameInfo, 3809 const TemplateArgumentListInfo &TemplateArgs); 3810 3811 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3812 SourceLocation TemplateKWLoc, 3813 CXXScopeSpec &SS, 3814 UnqualifiedId &Name, 3815 ParsedType ObjectType, 3816 bool EnteringContext, 3817 TemplateTy &Template); 3818 3819 DeclResult 3820 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3821 SourceLocation KWLoc, 3822 CXXScopeSpec &SS, 3823 TemplateTy Template, 3824 SourceLocation TemplateNameLoc, 3825 SourceLocation LAngleLoc, 3826 ASTTemplateArgsPtr TemplateArgs, 3827 SourceLocation RAngleLoc, 3828 AttributeList *Attr, 3829 MultiTemplateParamsArg TemplateParameterLists); 3830 3831 Decl *ActOnTemplateDeclarator(Scope *S, 3832 MultiTemplateParamsArg TemplateParameterLists, 3833 Declarator &D); 3834 3835 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3836 MultiTemplateParamsArg TemplateParameterLists, 3837 Declarator &D); 3838 3839 bool 3840 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3841 TemplateSpecializationKind NewTSK, 3842 NamedDecl *PrevDecl, 3843 TemplateSpecializationKind PrevTSK, 3844 SourceLocation PrevPtOfInstantiation, 3845 bool &SuppressNew); 3846 3847 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3848 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3849 LookupResult &Previous); 3850 3851 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 3852 TemplateArgumentListInfo *ExplicitTemplateArgs, 3853 LookupResult &Previous); 3854 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 3855 3856 DeclResult 3857 ActOnExplicitInstantiation(Scope *S, 3858 SourceLocation ExternLoc, 3859 SourceLocation TemplateLoc, 3860 unsigned TagSpec, 3861 SourceLocation KWLoc, 3862 const CXXScopeSpec &SS, 3863 TemplateTy Template, 3864 SourceLocation TemplateNameLoc, 3865 SourceLocation LAngleLoc, 3866 ASTTemplateArgsPtr TemplateArgs, 3867 SourceLocation RAngleLoc, 3868 AttributeList *Attr); 3869 3870 DeclResult 3871 ActOnExplicitInstantiation(Scope *S, 3872 SourceLocation ExternLoc, 3873 SourceLocation TemplateLoc, 3874 unsigned TagSpec, 3875 SourceLocation KWLoc, 3876 CXXScopeSpec &SS, 3877 IdentifierInfo *Name, 3878 SourceLocation NameLoc, 3879 AttributeList *Attr); 3880 3881 DeclResult ActOnExplicitInstantiation(Scope *S, 3882 SourceLocation ExternLoc, 3883 SourceLocation TemplateLoc, 3884 Declarator &D); 3885 3886 TemplateArgumentLoc 3887 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 3888 SourceLocation TemplateLoc, 3889 SourceLocation RAngleLoc, 3890 Decl *Param, 3891 SmallVectorImpl<TemplateArgument> &Converted); 3892 3893 /// \brief Specifies the context in which a particular template 3894 /// argument is being checked. 3895 enum CheckTemplateArgumentKind { 3896 /// \brief The template argument was specified in the code or was 3897 /// instantiated with some deduced template arguments. 3898 CTAK_Specified, 3899 3900 /// \brief The template argument was deduced via template argument 3901 /// deduction. 3902 CTAK_Deduced, 3903 3904 /// \brief The template argument was deduced from an array bound 3905 /// via template argument deduction. 3906 CTAK_DeducedFromArrayBound 3907 }; 3908 3909 bool CheckTemplateArgument(NamedDecl *Param, 3910 const TemplateArgumentLoc &Arg, 3911 NamedDecl *Template, 3912 SourceLocation TemplateLoc, 3913 SourceLocation RAngleLoc, 3914 unsigned ArgumentPackIndex, 3915 SmallVectorImpl<TemplateArgument> &Converted, 3916 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3917 3918 /// \brief Check that the given template arguments can be be provided to 3919 /// the given template, converting the arguments along the way. 3920 /// 3921 /// \param Template The template to which the template arguments are being 3922 /// provided. 3923 /// 3924 /// \param TemplateLoc The location of the template name in the source. 3925 /// 3926 /// \param TemplateArgs The list of template arguments. If the template is 3927 /// a template template parameter, this function may extend the set of 3928 /// template arguments to also include substituted, defaulted template 3929 /// arguments. 3930 /// 3931 /// \param PartialTemplateArgs True if the list of template arguments is 3932 /// intentionally partial, e.g., because we're checking just the initial 3933 /// set of template arguments. 3934 /// 3935 /// \param Converted Will receive the converted, canonicalized template 3936 /// arguments. 3937 /// 3938 /// \returns True if an error occurred, false otherwise. 3939 bool CheckTemplateArgumentList(TemplateDecl *Template, 3940 SourceLocation TemplateLoc, 3941 TemplateArgumentListInfo &TemplateArgs, 3942 bool PartialTemplateArgs, 3943 SmallVectorImpl<TemplateArgument> &Converted); 3944 3945 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 3946 const TemplateArgumentLoc &Arg, 3947 SmallVectorImpl<TemplateArgument> &Converted); 3948 3949 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 3950 TypeSourceInfo *Arg); 3951 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 3952 TemplateArgument &Converted); 3953 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 3954 QualType InstantiatedParamType, Expr *Arg, 3955 TemplateArgument &Converted, 3956 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3957 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 3958 const TemplateArgumentLoc &Arg); 3959 3960 ExprResult 3961 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 3962 QualType ParamType, 3963 SourceLocation Loc); 3964 ExprResult 3965 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 3966 SourceLocation Loc); 3967 3968 /// \brief Enumeration describing how template parameter lists are compared 3969 /// for equality. 3970 enum TemplateParameterListEqualKind { 3971 /// \brief We are matching the template parameter lists of two templates 3972 /// that might be redeclarations. 3973 /// 3974 /// \code 3975 /// template<typename T> struct X; 3976 /// template<typename T> struct X; 3977 /// \endcode 3978 TPL_TemplateMatch, 3979 3980 /// \brief We are matching the template parameter lists of two template 3981 /// template parameters as part of matching the template parameter lists 3982 /// of two templates that might be redeclarations. 3983 /// 3984 /// \code 3985 /// template<template<int I> class TT> struct X; 3986 /// template<template<int Value> class Other> struct X; 3987 /// \endcode 3988 TPL_TemplateTemplateParmMatch, 3989 3990 /// \brief We are matching the template parameter lists of a template 3991 /// template argument against the template parameter lists of a template 3992 /// template parameter. 3993 /// 3994 /// \code 3995 /// template<template<int Value> class Metafun> struct X; 3996 /// template<int Value> struct integer_c; 3997 /// X<integer_c> xic; 3998 /// \endcode 3999 TPL_TemplateTemplateArgumentMatch 4000 }; 4001 4002 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 4003 TemplateParameterList *Old, 4004 bool Complain, 4005 TemplateParameterListEqualKind Kind, 4006 SourceLocation TemplateArgLoc 4007 = SourceLocation()); 4008 4009 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 4010 4011 /// \brief Called when the parser has parsed a C++ typename 4012 /// specifier, e.g., "typename T::type". 4013 /// 4014 /// \param S The scope in which this typename type occurs. 4015 /// \param TypenameLoc the location of the 'typename' keyword 4016 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4017 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 4018 /// \param IdLoc the location of the identifier. 4019 TypeResult 4020 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4021 const CXXScopeSpec &SS, const IdentifierInfo &II, 4022 SourceLocation IdLoc); 4023 4024 /// \brief Called when the parser has parsed a C++ typename 4025 /// specifier that ends in a template-id, e.g., 4026 /// "typename MetaFun::template apply<T1, T2>". 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 TemplateLoc the location of the 'template' keyword, if any. 4032 /// \param TemplateName The template name. 4033 /// \param TemplateNameLoc The location of the template name. 4034 /// \param LAngleLoc The location of the opening angle bracket ('<'). 4035 /// \param TemplateArgs The template arguments. 4036 /// \param RAngleLoc The location of the closing angle bracket ('>'). 4037 TypeResult 4038 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4039 const CXXScopeSpec &SS, 4040 SourceLocation TemplateLoc, 4041 TemplateTy Template, 4042 SourceLocation TemplateNameLoc, 4043 SourceLocation LAngleLoc, 4044 ASTTemplateArgsPtr TemplateArgs, 4045 SourceLocation RAngleLoc); 4046 4047 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 4048 SourceLocation KeywordLoc, 4049 NestedNameSpecifierLoc QualifierLoc, 4050 const IdentifierInfo &II, 4051 SourceLocation IILoc); 4052 4053 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 4054 SourceLocation Loc, 4055 DeclarationName Name); 4056 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 4057 4058 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 4059 4060 std::string 4061 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4062 const TemplateArgumentList &Args); 4063 4064 std::string 4065 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4066 const TemplateArgument *Args, 4067 unsigned NumArgs); 4068 4069 //===--------------------------------------------------------------------===// 4070 // C++ Variadic Templates (C++0x [temp.variadic]) 4071 //===--------------------------------------------------------------------===// 4072 4073 /// \brief The context in which an unexpanded parameter pack is 4074 /// being diagnosed. 4075 /// 4076 /// Note that the values of this enumeration line up with the first 4077 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4078 enum UnexpandedParameterPackContext { 4079 /// \brief An arbitrary expression. 4080 UPPC_Expression = 0, 4081 4082 /// \brief The base type of a class type. 4083 UPPC_BaseType, 4084 4085 /// \brief The type of an arbitrary declaration. 4086 UPPC_DeclarationType, 4087 4088 /// \brief The type of a data member. 4089 UPPC_DataMemberType, 4090 4091 /// \brief The size of a bit-field. 4092 UPPC_BitFieldWidth, 4093 4094 /// \brief The expression in a static assertion. 4095 UPPC_StaticAssertExpression, 4096 4097 /// \brief The fixed underlying type of an enumeration. 4098 UPPC_FixedUnderlyingType, 4099 4100 /// \brief The enumerator value. 4101 UPPC_EnumeratorValue, 4102 4103 /// \brief A using declaration. 4104 UPPC_UsingDeclaration, 4105 4106 /// \brief A friend declaration. 4107 UPPC_FriendDeclaration, 4108 4109 /// \brief A declaration qualifier. 4110 UPPC_DeclarationQualifier, 4111 4112 /// \brief An initializer. 4113 UPPC_Initializer, 4114 4115 /// \brief A default argument. 4116 UPPC_DefaultArgument, 4117 4118 /// \brief The type of a non-type template parameter. 4119 UPPC_NonTypeTemplateParameterType, 4120 4121 /// \brief The type of an exception. 4122 UPPC_ExceptionType, 4123 4124 /// \brief Partial specialization. 4125 UPPC_PartialSpecialization 4126 }; 4127 4128 /// \brief If the given type contains an unexpanded parameter pack, 4129 /// diagnose the error. 4130 /// 4131 /// \param Loc The source location where a diagnostc should be emitted. 4132 /// 4133 /// \param T The type that is being checked for unexpanded parameter 4134 /// packs. 4135 /// 4136 /// \returns true if an error occurred, false otherwise. 4137 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4138 UnexpandedParameterPackContext UPPC); 4139 4140 /// \brief If the given expression contains an unexpanded parameter 4141 /// pack, diagnose the error. 4142 /// 4143 /// \param E The expression that is being checked for unexpanded 4144 /// parameter packs. 4145 /// 4146 /// \returns true if an error occurred, false otherwise. 4147 bool DiagnoseUnexpandedParameterPack(Expr *E, 4148 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4149 4150 /// \brief If the given nested-name-specifier contains an unexpanded 4151 /// parameter pack, diagnose the error. 4152 /// 4153 /// \param SS The nested-name-specifier that is being checked for 4154 /// unexpanded parameter packs. 4155 /// 4156 /// \returns true if an error occurred, false otherwise. 4157 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4158 UnexpandedParameterPackContext UPPC); 4159 4160 /// \brief If the given name contains an unexpanded parameter pack, 4161 /// diagnose the error. 4162 /// 4163 /// \param NameInfo The name (with source location information) that 4164 /// is being checked for unexpanded parameter packs. 4165 /// 4166 /// \returns true if an error occurred, false otherwise. 4167 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4168 UnexpandedParameterPackContext UPPC); 4169 4170 /// \brief If the given template name contains an unexpanded parameter pack, 4171 /// diagnose the error. 4172 /// 4173 /// \param Loc The location of the template name. 4174 /// 4175 /// \param Template The template name that is being checked for unexpanded 4176 /// parameter packs. 4177 /// 4178 /// \returns true if an error occurred, false otherwise. 4179 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4180 TemplateName Template, 4181 UnexpandedParameterPackContext UPPC); 4182 4183 /// \brief If the given template argument contains an unexpanded parameter 4184 /// pack, diagnose the error. 4185 /// 4186 /// \param Arg The template argument that is being checked for unexpanded 4187 /// parameter packs. 4188 /// 4189 /// \returns true if an error occurred, false otherwise. 4190 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4191 UnexpandedParameterPackContext UPPC); 4192 4193 /// \brief Collect the set of unexpanded parameter packs within the given 4194 /// template argument. 4195 /// 4196 /// \param Arg The template argument that will be traversed to find 4197 /// unexpanded parameter packs. 4198 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4199 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4200 4201 /// \brief Collect the set of unexpanded parameter packs within the given 4202 /// template argument. 4203 /// 4204 /// \param Arg The template argument that will be traversed to find 4205 /// unexpanded parameter packs. 4206 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4207 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4208 4209 /// \brief Collect the set of unexpanded parameter packs within the given 4210 /// type. 4211 /// 4212 /// \param T The type that will be traversed to find 4213 /// unexpanded parameter packs. 4214 void collectUnexpandedParameterPacks(QualType T, 4215 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4216 4217 /// \brief Collect the set of unexpanded parameter packs within the given 4218 /// type. 4219 /// 4220 /// \param TL The type that will be traversed to find 4221 /// unexpanded parameter packs. 4222 void collectUnexpandedParameterPacks(TypeLoc TL, 4223 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4224 4225 /// \brief Invoked when parsing a template argument followed by an 4226 /// ellipsis, which creates a pack expansion. 4227 /// 4228 /// \param Arg The template argument preceding the ellipsis, which 4229 /// may already be invalid. 4230 /// 4231 /// \param EllipsisLoc The location of the ellipsis. 4232 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4233 SourceLocation EllipsisLoc); 4234 4235 /// \brief Invoked when parsing a type followed by an ellipsis, which 4236 /// creates a pack expansion. 4237 /// 4238 /// \param Type The type preceding the ellipsis, which will become 4239 /// the pattern of the pack expansion. 4240 /// 4241 /// \param EllipsisLoc The location of the ellipsis. 4242 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4243 4244 /// \brief Construct a pack expansion type from the pattern of the pack 4245 /// expansion. 4246 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4247 SourceLocation EllipsisLoc, 4248 llvm::Optional<unsigned> NumExpansions); 4249 4250 /// \brief Construct a pack expansion type from the pattern of the pack 4251 /// expansion. 4252 QualType CheckPackExpansion(QualType Pattern, 4253 SourceRange PatternRange, 4254 SourceLocation EllipsisLoc, 4255 llvm::Optional<unsigned> NumExpansions); 4256 4257 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4258 /// creates a pack expansion. 4259 /// 4260 /// \param Pattern The expression preceding the ellipsis, which will become 4261 /// the pattern of the pack expansion. 4262 /// 4263 /// \param EllipsisLoc The location of the ellipsis. 4264 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4265 4266 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4267 /// creates a pack expansion. 4268 /// 4269 /// \param Pattern The expression preceding the ellipsis, which will become 4270 /// the pattern of the pack expansion. 4271 /// 4272 /// \param EllipsisLoc The location of the ellipsis. 4273 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4274 llvm::Optional<unsigned> NumExpansions); 4275 4276 /// \brief Determine whether we could expand a pack expansion with the 4277 /// given set of parameter packs into separate arguments by repeatedly 4278 /// transforming the pattern. 4279 /// 4280 /// \param EllipsisLoc The location of the ellipsis that identifies the 4281 /// pack expansion. 4282 /// 4283 /// \param PatternRange The source range that covers the entire pattern of 4284 /// the pack expansion. 4285 /// 4286 /// \param Unexpanded The set of unexpanded parameter packs within the 4287 /// pattern. 4288 /// 4289 /// \param NumUnexpanded The number of unexpanded parameter packs in 4290 /// \p Unexpanded. 4291 /// 4292 /// \param ShouldExpand Will be set to \c true if the transformer should 4293 /// expand the corresponding pack expansions into separate arguments. When 4294 /// set, \c NumExpansions must also be set. 4295 /// 4296 /// \param RetainExpansion Whether the caller should add an unexpanded 4297 /// pack expansion after all of the expanded arguments. This is used 4298 /// when extending explicitly-specified template argument packs per 4299 /// C++0x [temp.arg.explicit]p9. 4300 /// 4301 /// \param NumExpansions The number of separate arguments that will be in 4302 /// the expanded form of the corresponding pack expansion. This is both an 4303 /// input and an output parameter, which can be set by the caller if the 4304 /// number of expansions is known a priori (e.g., due to a prior substitution) 4305 /// and will be set by the callee when the number of expansions is known. 4306 /// The callee must set this value when \c ShouldExpand is \c true; it may 4307 /// set this value in other cases. 4308 /// 4309 /// \returns true if an error occurred (e.g., because the parameter packs 4310 /// are to be instantiated with arguments of different lengths), false 4311 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4312 /// must be set. 4313 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4314 SourceRange PatternRange, 4315 const UnexpandedParameterPack *Unexpanded, 4316 unsigned NumUnexpanded, 4317 const MultiLevelTemplateArgumentList &TemplateArgs, 4318 bool &ShouldExpand, 4319 bool &RetainExpansion, 4320 llvm::Optional<unsigned> &NumExpansions); 4321 4322 /// \brief Determine the number of arguments in the given pack expansion 4323 /// type. 4324 /// 4325 /// This routine already assumes that the pack expansion type can be 4326 /// expanded and that the number of arguments in the expansion is 4327 /// consistent across all of the unexpanded parameter packs in its pattern. 4328 unsigned getNumArgumentsInExpansion(QualType T, 4329 const MultiLevelTemplateArgumentList &TemplateArgs); 4330 4331 /// \brief Determine whether the given declarator contains any unexpanded 4332 /// parameter packs. 4333 /// 4334 /// This routine is used by the parser to disambiguate function declarators 4335 /// with an ellipsis prior to the ')', e.g., 4336 /// 4337 /// \code 4338 /// void f(T...); 4339 /// \endcode 4340 /// 4341 /// To determine whether we have an (unnamed) function parameter pack or 4342 /// a variadic function. 4343 /// 4344 /// \returns true if the declarator contains any unexpanded parameter packs, 4345 /// false otherwise. 4346 bool containsUnexpandedParameterPacks(Declarator &D); 4347 4348 //===--------------------------------------------------------------------===// 4349 // C++ Template Argument Deduction (C++ [temp.deduct]) 4350 //===--------------------------------------------------------------------===// 4351 4352 /// \brief Describes the result of template argument deduction. 4353 /// 4354 /// The TemplateDeductionResult enumeration describes the result of 4355 /// template argument deduction, as returned from 4356 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4357 /// structure provides additional information about the results of 4358 /// template argument deduction, e.g., the deduced template argument 4359 /// list (if successful) or the specific template parameters or 4360 /// deduced arguments that were involved in the failure. 4361 enum TemplateDeductionResult { 4362 /// \brief Template argument deduction was successful. 4363 TDK_Success = 0, 4364 /// \brief Template argument deduction exceeded the maximum template 4365 /// instantiation depth (which has already been diagnosed). 4366 TDK_InstantiationDepth, 4367 /// \brief Template argument deduction did not deduce a value 4368 /// for every template parameter. 4369 TDK_Incomplete, 4370 /// \brief Template argument deduction produced inconsistent 4371 /// deduced values for the given template parameter. 4372 TDK_Inconsistent, 4373 /// \brief Template argument deduction failed due to inconsistent 4374 /// cv-qualifiers on a template parameter type that would 4375 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4376 /// but were given a non-const "X". 4377 TDK_Underqualified, 4378 /// \brief Substitution of the deduced template argument values 4379 /// resulted in an error. 4380 TDK_SubstitutionFailure, 4381 /// \brief Substitution of the deduced template argument values 4382 /// into a non-deduced context produced a type or value that 4383 /// produces a type that does not match the original template 4384 /// arguments provided. 4385 TDK_NonDeducedMismatch, 4386 /// \brief When performing template argument deduction for a function 4387 /// template, there were too many call arguments. 4388 TDK_TooManyArguments, 4389 /// \brief When performing template argument deduction for a function 4390 /// template, there were too few call arguments. 4391 TDK_TooFewArguments, 4392 /// \brief The explicitly-specified template arguments were not valid 4393 /// template arguments for the given template. 4394 TDK_InvalidExplicitArguments, 4395 /// \brief The arguments included an overloaded function name that could 4396 /// not be resolved to a suitable function. 4397 TDK_FailedOverloadResolution 4398 }; 4399 4400 TemplateDeductionResult 4401 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4402 const TemplateArgumentList &TemplateArgs, 4403 sema::TemplateDeductionInfo &Info); 4404 4405 TemplateDeductionResult 4406 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4407 TemplateArgumentListInfo &ExplicitTemplateArgs, 4408 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4409 SmallVectorImpl<QualType> &ParamTypes, 4410 QualType *FunctionType, 4411 sema::TemplateDeductionInfo &Info); 4412 4413 /// brief A function argument from which we performed template argument 4414 // deduction for a call. 4415 struct OriginalCallArg { 4416 OriginalCallArg(QualType OriginalParamType, 4417 unsigned ArgIdx, 4418 QualType OriginalArgType) 4419 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4420 OriginalArgType(OriginalArgType) { } 4421 4422 QualType OriginalParamType; 4423 unsigned ArgIdx; 4424 QualType OriginalArgType; 4425 }; 4426 4427 TemplateDeductionResult 4428 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4429 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4430 unsigned NumExplicitlySpecified, 4431 FunctionDecl *&Specialization, 4432 sema::TemplateDeductionInfo &Info, 4433 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4434 4435 TemplateDeductionResult 4436 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4437 TemplateArgumentListInfo *ExplicitTemplateArgs, 4438 Expr **Args, unsigned NumArgs, 4439 FunctionDecl *&Specialization, 4440 sema::TemplateDeductionInfo &Info); 4441 4442 TemplateDeductionResult 4443 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4444 TemplateArgumentListInfo *ExplicitTemplateArgs, 4445 QualType ArgFunctionType, 4446 FunctionDecl *&Specialization, 4447 sema::TemplateDeductionInfo &Info); 4448 4449 TemplateDeductionResult 4450 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4451 QualType ToType, 4452 CXXConversionDecl *&Specialization, 4453 sema::TemplateDeductionInfo &Info); 4454 4455 TemplateDeductionResult 4456 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4457 TemplateArgumentListInfo *ExplicitTemplateArgs, 4458 FunctionDecl *&Specialization, 4459 sema::TemplateDeductionInfo &Info); 4460 4461 bool DeduceAutoType(TypeSourceInfo *AutoType, Expr *Initializer, 4462 TypeSourceInfo *&Result); 4463 4464 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4465 FunctionTemplateDecl *FT2, 4466 SourceLocation Loc, 4467 TemplatePartialOrderingContext TPOC, 4468 unsigned NumCallArguments); 4469 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4470 UnresolvedSetIterator SEnd, 4471 TemplatePartialOrderingContext TPOC, 4472 unsigned NumCallArguments, 4473 SourceLocation Loc, 4474 const PartialDiagnostic &NoneDiag, 4475 const PartialDiagnostic &AmbigDiag, 4476 const PartialDiagnostic &CandidateDiag, 4477 bool Complain = true); 4478 4479 ClassTemplatePartialSpecializationDecl * 4480 getMoreSpecializedPartialSpecialization( 4481 ClassTemplatePartialSpecializationDecl *PS1, 4482 ClassTemplatePartialSpecializationDecl *PS2, 4483 SourceLocation Loc); 4484 4485 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4486 bool OnlyDeduced, 4487 unsigned Depth, 4488 SmallVectorImpl<bool> &Used); 4489 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4490 SmallVectorImpl<bool> &Deduced); 4491 4492 //===--------------------------------------------------------------------===// 4493 // C++ Template Instantiation 4494 // 4495 4496 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4497 const TemplateArgumentList *Innermost = 0, 4498 bool RelativeToPrimary = false, 4499 const FunctionDecl *Pattern = 0); 4500 4501 /// \brief A template instantiation that is currently in progress. 4502 struct ActiveTemplateInstantiation { 4503 /// \brief The kind of template instantiation we are performing 4504 enum InstantiationKind { 4505 /// We are instantiating a template declaration. The entity is 4506 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4507 TemplateInstantiation, 4508 4509 /// We are instantiating a default argument for a template 4510 /// parameter. The Entity is the template, and 4511 /// TemplateArgs/NumTemplateArguments provides the template 4512 /// arguments as specified. 4513 /// FIXME: Use a TemplateArgumentList 4514 DefaultTemplateArgumentInstantiation, 4515 4516 /// We are instantiating a default argument for a function. 4517 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4518 /// provides the template arguments as specified. 4519 DefaultFunctionArgumentInstantiation, 4520 4521 /// We are substituting explicit template arguments provided for 4522 /// a function template. The entity is a FunctionTemplateDecl. 4523 ExplicitTemplateArgumentSubstitution, 4524 4525 /// We are substituting template argument determined as part of 4526 /// template argument deduction for either a class template 4527 /// partial specialization or a function template. The 4528 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4529 /// a FunctionTemplateDecl. 4530 DeducedTemplateArgumentSubstitution, 4531 4532 /// We are substituting prior template arguments into a new 4533 /// template parameter. The template parameter itself is either a 4534 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4535 PriorTemplateArgumentSubstitution, 4536 4537 /// We are checking the validity of a default template argument that 4538 /// has been used when naming a template-id. 4539 DefaultTemplateArgumentChecking 4540 } Kind; 4541 4542 /// \brief The point of instantiation within the source code. 4543 SourceLocation PointOfInstantiation; 4544 4545 /// \brief The template (or partial specialization) in which we are 4546 /// performing the instantiation, for substitutions of prior template 4547 /// arguments. 4548 NamedDecl *Template; 4549 4550 /// \brief The entity that is being instantiated. 4551 uintptr_t Entity; 4552 4553 /// \brief The list of template arguments we are substituting, if they 4554 /// are not part of the entity. 4555 const TemplateArgument *TemplateArgs; 4556 4557 /// \brief The number of template arguments in TemplateArgs. 4558 unsigned NumTemplateArgs; 4559 4560 /// \brief The template deduction info object associated with the 4561 /// substitution or checking of explicit or deduced template arguments. 4562 sema::TemplateDeductionInfo *DeductionInfo; 4563 4564 /// \brief The source range that covers the construct that cause 4565 /// the instantiation, e.g., the template-id that causes a class 4566 /// template instantiation. 4567 SourceRange InstantiationRange; 4568 4569 ActiveTemplateInstantiation() 4570 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4571 NumTemplateArgs(0), DeductionInfo(0) {} 4572 4573 /// \brief Determines whether this template is an actual instantiation 4574 /// that should be counted toward the maximum instantiation depth. 4575 bool isInstantiationRecord() const; 4576 4577 friend bool operator==(const ActiveTemplateInstantiation &X, 4578 const ActiveTemplateInstantiation &Y) { 4579 if (X.Kind != Y.Kind) 4580 return false; 4581 4582 if (X.Entity != Y.Entity) 4583 return false; 4584 4585 switch (X.Kind) { 4586 case TemplateInstantiation: 4587 return true; 4588 4589 case PriorTemplateArgumentSubstitution: 4590 case DefaultTemplateArgumentChecking: 4591 if (X.Template != Y.Template) 4592 return false; 4593 4594 // Fall through 4595 4596 case DefaultTemplateArgumentInstantiation: 4597 case ExplicitTemplateArgumentSubstitution: 4598 case DeducedTemplateArgumentSubstitution: 4599 case DefaultFunctionArgumentInstantiation: 4600 return X.TemplateArgs == Y.TemplateArgs; 4601 4602 } 4603 4604 return true; 4605 } 4606 4607 friend bool operator!=(const ActiveTemplateInstantiation &X, 4608 const ActiveTemplateInstantiation &Y) { 4609 return !(X == Y); 4610 } 4611 }; 4612 4613 /// \brief List of active template instantiations. 4614 /// 4615 /// This vector is treated as a stack. As one template instantiation 4616 /// requires another template instantiation, additional 4617 /// instantiations are pushed onto the stack up to a 4618 /// user-configurable limit LangOptions::InstantiationDepth. 4619 SmallVector<ActiveTemplateInstantiation, 16> 4620 ActiveTemplateInstantiations; 4621 4622 /// \brief Whether we are in a SFINAE context that is not associated with 4623 /// template instantiation. 4624 /// 4625 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4626 /// of a template instantiation or template argument deduction. 4627 bool InNonInstantiationSFINAEContext; 4628 4629 /// \brief The number of ActiveTemplateInstantiation entries in 4630 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4631 /// therefore, should not be counted as part of the instantiation depth. 4632 unsigned NonInstantiationEntries; 4633 4634 /// \brief The last template from which a template instantiation 4635 /// error or warning was produced. 4636 /// 4637 /// This value is used to suppress printing of redundant template 4638 /// instantiation backtraces when there are multiple errors in the 4639 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4640 /// to implement it anywhere else. 4641 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4642 4643 /// \brief The current index into pack expansion arguments that will be 4644 /// used for substitution of parameter packs. 4645 /// 4646 /// The pack expansion index will be -1 to indicate that parameter packs 4647 /// should be instantiated as themselves. Otherwise, the index specifies 4648 /// which argument within the parameter pack will be used for substitution. 4649 int ArgumentPackSubstitutionIndex; 4650 4651 /// \brief RAII object used to change the argument pack substitution index 4652 /// within a \c Sema object. 4653 /// 4654 /// See \c ArgumentPackSubstitutionIndex for more information. 4655 class ArgumentPackSubstitutionIndexRAII { 4656 Sema &Self; 4657 int OldSubstitutionIndex; 4658 4659 public: 4660 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4661 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4662 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4663 } 4664 4665 ~ArgumentPackSubstitutionIndexRAII() { 4666 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4667 } 4668 }; 4669 4670 friend class ArgumentPackSubstitutionRAII; 4671 4672 /// \brief The stack of calls expression undergoing template instantiation. 4673 /// 4674 /// The top of this stack is used by a fixit instantiating unresolved 4675 /// function calls to fix the AST to match the textual change it prints. 4676 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4677 4678 /// \brief For each declaration that involved template argument deduction, the 4679 /// set of diagnostics that were suppressed during that template argument 4680 /// deduction. 4681 /// 4682 /// FIXME: Serialize this structure to the AST file. 4683 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 4684 SuppressedDiagnostics; 4685 4686 /// \brief A stack object to be created when performing template 4687 /// instantiation. 4688 /// 4689 /// Construction of an object of type \c InstantiatingTemplate 4690 /// pushes the current instantiation onto the stack of active 4691 /// instantiations. If the size of this stack exceeds the maximum 4692 /// number of recursive template instantiations, construction 4693 /// produces an error and evaluates true. 4694 /// 4695 /// Destruction of this object will pop the named instantiation off 4696 /// the stack. 4697 struct InstantiatingTemplate { 4698 /// \brief Note that we are instantiating a class template, 4699 /// function template, or a member thereof. 4700 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4701 Decl *Entity, 4702 SourceRange InstantiationRange = SourceRange()); 4703 4704 /// \brief Note that we are instantiating a default argument in a 4705 /// template-id. 4706 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4707 TemplateDecl *Template, 4708 const TemplateArgument *TemplateArgs, 4709 unsigned NumTemplateArgs, 4710 SourceRange InstantiationRange = SourceRange()); 4711 4712 /// \brief Note that we are instantiating a default argument in a 4713 /// template-id. 4714 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4715 FunctionTemplateDecl *FunctionTemplate, 4716 const TemplateArgument *TemplateArgs, 4717 unsigned NumTemplateArgs, 4718 ActiveTemplateInstantiation::InstantiationKind Kind, 4719 sema::TemplateDeductionInfo &DeductionInfo, 4720 SourceRange InstantiationRange = SourceRange()); 4721 4722 /// \brief Note that we are instantiating as part of template 4723 /// argument deduction for a class template partial 4724 /// specialization. 4725 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4726 ClassTemplatePartialSpecializationDecl *PartialSpec, 4727 const TemplateArgument *TemplateArgs, 4728 unsigned NumTemplateArgs, 4729 sema::TemplateDeductionInfo &DeductionInfo, 4730 SourceRange InstantiationRange = SourceRange()); 4731 4732 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4733 ParmVarDecl *Param, 4734 const TemplateArgument *TemplateArgs, 4735 unsigned NumTemplateArgs, 4736 SourceRange InstantiationRange = SourceRange()); 4737 4738 /// \brief Note that we are substituting prior template arguments into a 4739 /// non-type or template template parameter. 4740 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4741 NamedDecl *Template, 4742 NonTypeTemplateParmDecl *Param, 4743 const TemplateArgument *TemplateArgs, 4744 unsigned NumTemplateArgs, 4745 SourceRange InstantiationRange); 4746 4747 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4748 NamedDecl *Template, 4749 TemplateTemplateParmDecl *Param, 4750 const TemplateArgument *TemplateArgs, 4751 unsigned NumTemplateArgs, 4752 SourceRange InstantiationRange); 4753 4754 /// \brief Note that we are checking the default template argument 4755 /// against the template parameter for a given template-id. 4756 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4757 TemplateDecl *Template, 4758 NamedDecl *Param, 4759 const TemplateArgument *TemplateArgs, 4760 unsigned NumTemplateArgs, 4761 SourceRange InstantiationRange); 4762 4763 4764 /// \brief Note that we have finished instantiating this template. 4765 void Clear(); 4766 4767 ~InstantiatingTemplate() { Clear(); } 4768 4769 /// \brief Determines whether we have exceeded the maximum 4770 /// recursive template instantiations. 4771 operator bool() const { return Invalid; } 4772 4773 private: 4774 Sema &SemaRef; 4775 bool Invalid; 4776 bool SavedInNonInstantiationSFINAEContext; 4777 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4778 SourceRange InstantiationRange); 4779 4780 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4781 4782 InstantiatingTemplate& 4783 operator=(const InstantiatingTemplate&); // not implemented 4784 }; 4785 4786 void PrintInstantiationStack(); 4787 4788 /// \brief Determines whether we are currently in a context where 4789 /// template argument substitution failures are not considered 4790 /// errors. 4791 /// 4792 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4793 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4794 /// template-deduction context object, which can be used to capture 4795 /// diagnostics that will be suppressed. 4796 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4797 4798 /// \brief RAII class used to determine whether SFINAE has 4799 /// trapped any errors that occur during template argument 4800 /// deduction.` 4801 class SFINAETrap { 4802 Sema &SemaRef; 4803 unsigned PrevSFINAEErrors; 4804 bool PrevInNonInstantiationSFINAEContext; 4805 bool PrevAccessCheckingSFINAE; 4806 4807 public: 4808 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 4809 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 4810 PrevInNonInstantiationSFINAEContext( 4811 SemaRef.InNonInstantiationSFINAEContext), 4812 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 4813 { 4814 if (!SemaRef.isSFINAEContext()) 4815 SemaRef.InNonInstantiationSFINAEContext = true; 4816 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 4817 } 4818 4819 ~SFINAETrap() { 4820 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 4821 SemaRef.InNonInstantiationSFINAEContext 4822 = PrevInNonInstantiationSFINAEContext; 4823 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 4824 } 4825 4826 /// \brief Determine whether any SFINAE errors have been trapped. 4827 bool hasErrorOccurred() const { 4828 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 4829 } 4830 }; 4831 4832 /// \brief The current instantiation scope used to store local 4833 /// variables. 4834 LocalInstantiationScope *CurrentInstantiationScope; 4835 4836 /// \brief The number of typos corrected by CorrectTypo. 4837 unsigned TyposCorrected; 4838 4839 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 4840 UnqualifiedTyposCorrectedMap; 4841 4842 /// \brief A cache containing the results of typo correction for unqualified 4843 /// name lookup. 4844 /// 4845 /// The string is the string that we corrected to (which may be empty, if 4846 /// there was no correction), while the boolean will be true when the 4847 /// string represents a keyword. 4848 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 4849 4850 /// \brief Worker object for performing CFG-based warnings. 4851 sema::AnalysisBasedWarnings AnalysisWarnings; 4852 4853 /// \brief An entity for which implicit template instantiation is required. 4854 /// 4855 /// The source location associated with the declaration is the first place in 4856 /// the source code where the declaration was "used". It is not necessarily 4857 /// the point of instantiation (which will be either before or after the 4858 /// namespace-scope declaration that triggered this implicit instantiation), 4859 /// However, it is the location that diagnostics should generally refer to, 4860 /// because users will need to know what code triggered the instantiation. 4861 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 4862 4863 /// \brief The queue of implicit template instantiations that are required 4864 /// but have not yet been performed. 4865 std::deque<PendingImplicitInstantiation> PendingInstantiations; 4866 4867 /// \brief The queue of implicit template instantiations that are required 4868 /// and must be performed within the current local scope. 4869 /// 4870 /// This queue is only used for member functions of local classes in 4871 /// templates, which must be instantiated in the same scope as their 4872 /// enclosing function, so that they can reference function-local 4873 /// types, static variables, enumerators, etc. 4874 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 4875 4876 void PerformPendingInstantiations(bool LocalOnly = false); 4877 4878 TypeSourceInfo *SubstType(TypeSourceInfo *T, 4879 const MultiLevelTemplateArgumentList &TemplateArgs, 4880 SourceLocation Loc, DeclarationName Entity); 4881 4882 QualType SubstType(QualType T, 4883 const MultiLevelTemplateArgumentList &TemplateArgs, 4884 SourceLocation Loc, DeclarationName Entity); 4885 4886 TypeSourceInfo *SubstType(TypeLoc TL, 4887 const MultiLevelTemplateArgumentList &TemplateArgs, 4888 SourceLocation Loc, DeclarationName Entity); 4889 4890 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 4891 const MultiLevelTemplateArgumentList &TemplateArgs, 4892 SourceLocation Loc, 4893 DeclarationName Entity); 4894 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 4895 const MultiLevelTemplateArgumentList &TemplateArgs, 4896 int indexAdjustment, 4897 llvm::Optional<unsigned> NumExpansions); 4898 bool SubstParmTypes(SourceLocation Loc, 4899 ParmVarDecl **Params, unsigned NumParams, 4900 const MultiLevelTemplateArgumentList &TemplateArgs, 4901 SmallVectorImpl<QualType> &ParamTypes, 4902 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 4903 ExprResult SubstExpr(Expr *E, 4904 const MultiLevelTemplateArgumentList &TemplateArgs); 4905 4906 /// \brief Substitute the given template arguments into a list of 4907 /// expressions, expanding pack expansions if required. 4908 /// 4909 /// \param Exprs The list of expressions to substitute into. 4910 /// 4911 /// \param NumExprs The number of expressions in \p Exprs. 4912 /// 4913 /// \param IsCall Whether this is some form of call, in which case 4914 /// default arguments will be dropped. 4915 /// 4916 /// \param TemplateArgs The set of template arguments to substitute. 4917 /// 4918 /// \param Outputs Will receive all of the substituted arguments. 4919 /// 4920 /// \returns true if an error occurred, false otherwise. 4921 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 4922 const MultiLevelTemplateArgumentList &TemplateArgs, 4923 SmallVectorImpl<Expr *> &Outputs); 4924 4925 StmtResult SubstStmt(Stmt *S, 4926 const MultiLevelTemplateArgumentList &TemplateArgs); 4927 4928 Decl *SubstDecl(Decl *D, DeclContext *Owner, 4929 const MultiLevelTemplateArgumentList &TemplateArgs); 4930 4931 bool 4932 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 4933 CXXRecordDecl *Pattern, 4934 const MultiLevelTemplateArgumentList &TemplateArgs); 4935 4936 bool 4937 InstantiateClass(SourceLocation PointOfInstantiation, 4938 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 4939 const MultiLevelTemplateArgumentList &TemplateArgs, 4940 TemplateSpecializationKind TSK, 4941 bool Complain = true); 4942 4943 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 4944 const Decl *Pattern, Decl *Inst); 4945 4946 bool 4947 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 4948 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4949 TemplateSpecializationKind TSK, 4950 bool Complain = true); 4951 4952 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 4953 CXXRecordDecl *Instantiation, 4954 const MultiLevelTemplateArgumentList &TemplateArgs, 4955 TemplateSpecializationKind TSK); 4956 4957 void InstantiateClassTemplateSpecializationMembers( 4958 SourceLocation PointOfInstantiation, 4959 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4960 TemplateSpecializationKind TSK); 4961 4962 NestedNameSpecifierLoc 4963 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 4964 const MultiLevelTemplateArgumentList &TemplateArgs); 4965 4966 DeclarationNameInfo 4967 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 4968 const MultiLevelTemplateArgumentList &TemplateArgs); 4969 TemplateName 4970 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 4971 SourceLocation Loc, 4972 const MultiLevelTemplateArgumentList &TemplateArgs); 4973 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 4974 TemplateArgumentListInfo &Result, 4975 const MultiLevelTemplateArgumentList &TemplateArgs); 4976 4977 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 4978 FunctionDecl *Function, 4979 bool Recursive = false, 4980 bool DefinitionRequired = false); 4981 void InstantiateStaticDataMemberDefinition( 4982 SourceLocation PointOfInstantiation, 4983 VarDecl *Var, 4984 bool Recursive = false, 4985 bool DefinitionRequired = false); 4986 4987 void InstantiateMemInitializers(CXXConstructorDecl *New, 4988 const CXXConstructorDecl *Tmpl, 4989 const MultiLevelTemplateArgumentList &TemplateArgs); 4990 bool InstantiateInitializer(Expr *Init, 4991 const MultiLevelTemplateArgumentList &TemplateArgs, 4992 SourceLocation &LParenLoc, 4993 ASTOwningVector<Expr*> &NewArgs, 4994 SourceLocation &RParenLoc); 4995 4996 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 4997 const MultiLevelTemplateArgumentList &TemplateArgs); 4998 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 4999 const MultiLevelTemplateArgumentList &TemplateArgs); 5000 5001 // Objective-C declarations. 5002 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 5003 IdentifierInfo *ClassName, 5004 SourceLocation ClassLoc, 5005 IdentifierInfo *SuperName, 5006 SourceLocation SuperLoc, 5007 Decl * const *ProtoRefs, 5008 unsigned NumProtoRefs, 5009 const SourceLocation *ProtoLocs, 5010 SourceLocation EndProtoLoc, 5011 AttributeList *AttrList); 5012 5013 Decl *ActOnCompatiblityAlias( 5014 SourceLocation AtCompatibilityAliasLoc, 5015 IdentifierInfo *AliasName, SourceLocation AliasLocation, 5016 IdentifierInfo *ClassName, SourceLocation ClassLocation); 5017 5018 bool CheckForwardProtocolDeclarationForCircularDependency( 5019 IdentifierInfo *PName, 5020 SourceLocation &PLoc, SourceLocation PrevLoc, 5021 const ObjCList<ObjCProtocolDecl> &PList); 5022 5023 Decl *ActOnStartProtocolInterface( 5024 SourceLocation AtProtoInterfaceLoc, 5025 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 5026 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 5027 const SourceLocation *ProtoLocs, 5028 SourceLocation EndProtoLoc, 5029 AttributeList *AttrList); 5030 5031 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 5032 IdentifierInfo *ClassName, 5033 SourceLocation ClassLoc, 5034 IdentifierInfo *CategoryName, 5035 SourceLocation CategoryLoc, 5036 Decl * const *ProtoRefs, 5037 unsigned NumProtoRefs, 5038 const SourceLocation *ProtoLocs, 5039 SourceLocation EndProtoLoc); 5040 5041 Decl *ActOnStartClassImplementation( 5042 SourceLocation AtClassImplLoc, 5043 IdentifierInfo *ClassName, SourceLocation ClassLoc, 5044 IdentifierInfo *SuperClassname, 5045 SourceLocation SuperClassLoc); 5046 5047 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 5048 IdentifierInfo *ClassName, 5049 SourceLocation ClassLoc, 5050 IdentifierInfo *CatName, 5051 SourceLocation CatLoc); 5052 5053 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc, 5054 IdentifierInfo **IdentList, 5055 SourceLocation *IdentLocs, 5056 unsigned NumElts); 5057 5058 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 5059 const IdentifierLocPair *IdentList, 5060 unsigned NumElts, 5061 AttributeList *attrList); 5062 5063 void FindProtocolDeclaration(bool WarnOnDeclarations, 5064 const IdentifierLocPair *ProtocolId, 5065 unsigned NumProtocols, 5066 SmallVectorImpl<Decl *> &Protocols); 5067 5068 /// Ensure attributes are consistent with type. 5069 /// \param [in, out] Attributes The attributes to check; they will 5070 /// be modified to be consistent with \arg PropertyTy. 5071 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5072 SourceLocation Loc, 5073 unsigned &Attributes); 5074 5075 /// Process the specified property declaration and create decls for the 5076 /// setters and getters as needed. 5077 /// \param property The property declaration being processed 5078 /// \param DC The semantic container for the property 5079 /// \param redeclaredProperty Declaration for property if redeclared 5080 /// in class extension. 5081 /// \param lexicalDC Container for redeclaredProperty. 5082 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5083 ObjCContainerDecl *DC, 5084 ObjCPropertyDecl *redeclaredProperty = 0, 5085 ObjCContainerDecl *lexicalDC = 0); 5086 5087 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5088 ObjCPropertyDecl *SuperProperty, 5089 const IdentifierInfo *Name); 5090 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5091 5092 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5093 ObjCMethodDecl *MethodDecl, 5094 bool IsInstance); 5095 5096 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5097 5098 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5099 ObjCInterfaceDecl *ID); 5100 5101 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5102 ObjCProtocolDecl *PDecl); 5103 5104 void ActOnAtEnd(Scope *S, SourceRange AtEnd, 5105 Decl **allMethods = 0, unsigned allNum = 0, 5106 Decl **allProperties = 0, unsigned pNum = 0, 5107 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5108 5109 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5110 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5111 Selector GetterSel, Selector SetterSel, 5112 bool *OverridingProperty, 5113 tok::ObjCKeywordKind MethodImplKind, 5114 DeclContext *lexicalDC = 0); 5115 5116 Decl *ActOnPropertyImplDecl(Scope *S, 5117 SourceLocation AtLoc, 5118 SourceLocation PropertyLoc, 5119 bool ImplKind, 5120 IdentifierInfo *PropertyId, 5121 IdentifierInfo *PropertyIvar, 5122 SourceLocation PropertyIvarLoc); 5123 5124 enum ObjCSpecialMethodKind { 5125 OSMK_None, 5126 OSMK_Alloc, 5127 OSMK_New, 5128 OSMK_Copy, 5129 OSMK_RetainingInit, 5130 OSMK_NonRetainingInit 5131 }; 5132 5133 struct ObjCArgInfo { 5134 IdentifierInfo *Name; 5135 SourceLocation NameLoc; 5136 // The Type is null if no type was specified, and the DeclSpec is invalid 5137 // in this case. 5138 ParsedType Type; 5139 ObjCDeclSpec DeclSpec; 5140 5141 /// ArgAttrs - Attribute list for this argument. 5142 AttributeList *ArgAttrs; 5143 }; 5144 5145 Decl *ActOnMethodDeclaration( 5146 Scope *S, 5147 SourceLocation BeginLoc, // location of the + or -. 5148 SourceLocation EndLoc, // location of the ; or {. 5149 tok::TokenKind MethodType, 5150 ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5151 SourceLocation SelectorStartLoc, Selector Sel, 5152 // optional arguments. The number of types/arguments is obtained 5153 // from the Sel.getNumArgs(). 5154 ObjCArgInfo *ArgInfo, 5155 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5156 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5157 bool isVariadic, bool MethodDefinition); 5158 5159 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5160 // Will search "local" class/category implementations for a method decl. 5161 // Will also search in class's root looking for instance method. 5162 // Returns 0 if no method is found. 5163 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5164 ObjCInterfaceDecl *CDecl); 5165 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5166 ObjCInterfaceDecl *ClassDecl); 5167 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5168 const ObjCObjectPointerType *OPT, 5169 bool IsInstance); 5170 5171 bool inferObjCARCLifetime(ValueDecl *decl); 5172 5173 ExprResult 5174 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5175 Expr *BaseExpr, 5176 SourceLocation OpLoc, 5177 DeclarationName MemberName, 5178 SourceLocation MemberLoc, 5179 SourceLocation SuperLoc, QualType SuperType, 5180 bool Super); 5181 5182 ExprResult 5183 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5184 IdentifierInfo &propertyName, 5185 SourceLocation receiverNameLoc, 5186 SourceLocation propertyNameLoc); 5187 5188 ObjCMethodDecl *tryCaptureObjCSelf(); 5189 5190 /// \brief Describes the kind of message expression indicated by a message 5191 /// send that starts with an identifier. 5192 enum ObjCMessageKind { 5193 /// \brief The message is sent to 'super'. 5194 ObjCSuperMessage, 5195 /// \brief The message is an instance message. 5196 ObjCInstanceMessage, 5197 /// \brief The message is a class message, and the identifier is a type 5198 /// name. 5199 ObjCClassMessage 5200 }; 5201 5202 ObjCMessageKind getObjCMessageKind(Scope *S, 5203 IdentifierInfo *Name, 5204 SourceLocation NameLoc, 5205 bool IsSuper, 5206 bool HasTrailingDot, 5207 ParsedType &ReceiverType); 5208 5209 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5210 Selector Sel, 5211 SourceLocation LBracLoc, 5212 SourceLocation SelectorLoc, 5213 SourceLocation RBracLoc, 5214 MultiExprArg Args); 5215 5216 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5217 QualType ReceiverType, 5218 SourceLocation SuperLoc, 5219 Selector Sel, 5220 ObjCMethodDecl *Method, 5221 SourceLocation LBracLoc, 5222 SourceLocation SelectorLoc, 5223 SourceLocation RBracLoc, 5224 MultiExprArg Args); 5225 5226 ExprResult ActOnClassMessage(Scope *S, 5227 ParsedType Receiver, 5228 Selector Sel, 5229 SourceLocation LBracLoc, 5230 SourceLocation SelectorLoc, 5231 SourceLocation RBracLoc, 5232 MultiExprArg Args); 5233 5234 ExprResult BuildInstanceMessage(Expr *Receiver, 5235 QualType ReceiverType, 5236 SourceLocation SuperLoc, 5237 Selector Sel, 5238 ObjCMethodDecl *Method, 5239 SourceLocation LBracLoc, 5240 SourceLocation SelectorLoc, 5241 SourceLocation RBracLoc, 5242 MultiExprArg Args); 5243 5244 ExprResult ActOnInstanceMessage(Scope *S, 5245 Expr *Receiver, 5246 Selector Sel, 5247 SourceLocation LBracLoc, 5248 SourceLocation SelectorLoc, 5249 SourceLocation RBracLoc, 5250 MultiExprArg Args); 5251 5252 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5253 ObjCBridgeCastKind Kind, 5254 SourceLocation BridgeKeywordLoc, 5255 TypeSourceInfo *TSInfo, 5256 Expr *SubExpr); 5257 5258 ExprResult ActOnObjCBridgedCast(Scope *S, 5259 SourceLocation LParenLoc, 5260 ObjCBridgeCastKind Kind, 5261 SourceLocation BridgeKeywordLoc, 5262 ParsedType Type, 5263 SourceLocation RParenLoc, 5264 Expr *SubExpr); 5265 5266 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5267 5268 /// \brief Check whether the given new method is a valid override of the 5269 /// given overridden method, and set any properties that should be inherited. 5270 /// 5271 /// \returns True if an error occurred. 5272 bool CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5273 const ObjCMethodDecl *Overridden, 5274 bool IsImplementation); 5275 5276 /// \brief Check whether the given method overrides any methods in its class, 5277 /// calling \c CheckObjCMethodOverride for each overridden method. 5278 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5279 5280 enum PragmaOptionsAlignKind { 5281 POAK_Native, // #pragma options align=native 5282 POAK_Natural, // #pragma options align=natural 5283 POAK_Packed, // #pragma options align=packed 5284 POAK_Power, // #pragma options align=power 5285 POAK_Mac68k, // #pragma options align=mac68k 5286 POAK_Reset // #pragma options align=reset 5287 }; 5288 5289 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5290 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5291 SourceLocation PragmaLoc, 5292 SourceLocation KindLoc); 5293 5294 enum PragmaPackKind { 5295 PPK_Default, // #pragma pack([n]) 5296 PPK_Show, // #pragma pack(show), only supported by MSVC. 5297 PPK_Push, // #pragma pack(push, [identifier], [n]) 5298 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5299 }; 5300 5301 enum PragmaMSStructKind { 5302 PMSST_OFF, // #pragms ms_struct off 5303 PMSST_ON // #pragms ms_struct on 5304 }; 5305 5306 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5307 void ActOnPragmaPack(PragmaPackKind Kind, 5308 IdentifierInfo *Name, 5309 Expr *Alignment, 5310 SourceLocation PragmaLoc, 5311 SourceLocation LParenLoc, 5312 SourceLocation RParenLoc); 5313 5314 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5315 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5316 5317 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5318 void ActOnPragmaUnused(const Token &Identifier, 5319 Scope *curScope, 5320 SourceLocation PragmaLoc); 5321 5322 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5323 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 5324 SourceLocation PragmaLoc); 5325 5326 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II); 5327 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5328 5329 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5330 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5331 SourceLocation PragmaLoc, 5332 SourceLocation WeakNameLoc); 5333 5334 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5335 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5336 IdentifierInfo* AliasName, 5337 SourceLocation PragmaLoc, 5338 SourceLocation WeakNameLoc, 5339 SourceLocation AliasNameLoc); 5340 5341 /// ActOnPragmaFPContract - Called on well formed 5342 /// #pragma {STDC,OPENCL} FP_CONTRACT 5343 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5344 5345 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5346 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5347 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5348 5349 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5350 void AddMsStructLayoutForRecord(RecordDecl *RD); 5351 5352 /// FreePackedContext - Deallocate and null out PackContext. 5353 void FreePackedContext(); 5354 5355 /// PushNamespaceVisibilityAttr - Note that we've entered a 5356 /// namespace with a visibility attribute. 5357 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 5358 5359 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5360 /// add an appropriate visibility attribute. 5361 void AddPushedVisibilityAttribute(Decl *RD); 5362 5363 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5364 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5365 void PopPragmaVisibility(); 5366 5367 /// FreeVisContext - Deallocate and null out VisContext. 5368 void FreeVisContext(); 5369 5370 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5371 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, Expr *E); 5372 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, TypeSourceInfo *T); 5373 5374 /// CastCategory - Get the correct forwarded implicit cast result category 5375 /// from the inner expression. 5376 ExprValueKind CastCategory(Expr *E); 5377 5378 /// \brief The kind of conversion being performed. 5379 enum CheckedConversionKind { 5380 /// \brief An implicit conversion. 5381 CCK_ImplicitConversion, 5382 /// \brief A C-style cast. 5383 CCK_CStyleCast, 5384 /// \brief A functional-style cast. 5385 CCK_FunctionalCast, 5386 /// \brief A cast other than a C-style cast. 5387 CCK_OtherCast 5388 }; 5389 5390 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5391 /// cast. If there is already an implicit cast, merge into the existing one. 5392 /// If isLvalue, the result of the cast is an lvalue. 5393 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5394 ExprValueKind VK = VK_RValue, 5395 const CXXCastPath *BasePath = 0, 5396 CheckedConversionKind CCK 5397 = CCK_ImplicitConversion); 5398 5399 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5400 /// to the conversion from scalar type ScalarTy to the Boolean type. 5401 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5402 5403 /// IgnoredValueConversions - Given that an expression's result is 5404 /// syntactically ignored, perform any conversions that are 5405 /// required. 5406 ExprResult IgnoredValueConversions(Expr *E); 5407 5408 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5409 // functions and arrays to their respective pointers (C99 6.3.2.1). 5410 ExprResult UsualUnaryConversions(Expr *E); 5411 5412 // DefaultFunctionArrayConversion - converts functions and arrays 5413 // to their respective pointers (C99 6.3.2.1). 5414 ExprResult DefaultFunctionArrayConversion(Expr *E); 5415 5416 // DefaultFunctionArrayLvalueConversion - converts functions and 5417 // arrays to their respective pointers and performs the 5418 // lvalue-to-rvalue conversion. 5419 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5420 5421 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5422 // the operand. This is DefaultFunctionArrayLvalueConversion, 5423 // except that it assumes the operand isn't of function or array 5424 // type. 5425 ExprResult DefaultLvalueConversion(Expr *E); 5426 5427 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5428 // do not have a prototype. Integer promotions are performed on each 5429 // argument, and arguments that have type float are promoted to double. 5430 ExprResult DefaultArgumentPromotion(Expr *E); 5431 5432 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5433 enum VariadicCallType { 5434 VariadicFunction, 5435 VariadicBlock, 5436 VariadicMethod, 5437 VariadicConstructor, 5438 VariadicDoesNotApply 5439 }; 5440 5441 /// GatherArgumentsForCall - Collector argument expressions for various 5442 /// form of call prototypes. 5443 bool GatherArgumentsForCall(SourceLocation CallLoc, 5444 FunctionDecl *FDecl, 5445 const FunctionProtoType *Proto, 5446 unsigned FirstProtoArg, 5447 Expr **Args, unsigned NumArgs, 5448 SmallVector<Expr *, 8> &AllArgs, 5449 VariadicCallType CallType = VariadicDoesNotApply); 5450 5451 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5452 // will warn if the resulting type is not a POD type. 5453 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5454 FunctionDecl *FDecl); 5455 5456 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5457 // operands and then handles various conversions that are common to binary 5458 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5459 // routine returns the first non-arithmetic type found. The client is 5460 // responsible for emitting appropriate error diagnostics. 5461 QualType UsualArithmeticConversions(ExprResult &lExpr, ExprResult &rExpr, 5462 bool isCompAssign = false); 5463 5464 /// AssignConvertType - All of the 'assignment' semantic checks return this 5465 /// enum to indicate whether the assignment was allowed. These checks are 5466 /// done for simple assignments, as well as initialization, return from 5467 /// function, argument passing, etc. The query is phrased in terms of a 5468 /// source and destination type. 5469 enum AssignConvertType { 5470 /// Compatible - the types are compatible according to the standard. 5471 Compatible, 5472 5473 /// PointerToInt - The assignment converts a pointer to an int, which we 5474 /// accept as an extension. 5475 PointerToInt, 5476 5477 /// IntToPointer - The assignment converts an int to a pointer, which we 5478 /// accept as an extension. 5479 IntToPointer, 5480 5481 /// FunctionVoidPointer - The assignment is between a function pointer and 5482 /// void*, which the standard doesn't allow, but we accept as an extension. 5483 FunctionVoidPointer, 5484 5485 /// IncompatiblePointer - The assignment is between two pointers types that 5486 /// are not compatible, but we accept them as an extension. 5487 IncompatiblePointer, 5488 5489 /// IncompatiblePointer - The assignment is between two pointers types which 5490 /// point to integers which have a different sign, but are otherwise identical. 5491 /// This is a subset of the above, but broken out because it's by far the most 5492 /// common case of incompatible pointers. 5493 IncompatiblePointerSign, 5494 5495 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5496 /// c/v/r qualifiers, which we accept as an extension. 5497 CompatiblePointerDiscardsQualifiers, 5498 5499 /// IncompatiblePointerDiscardsQualifiers - The assignment 5500 /// discards qualifiers that we don't permit to be discarded, 5501 /// like address spaces. 5502 IncompatiblePointerDiscardsQualifiers, 5503 5504 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5505 /// nested pointer types, and the qualifiers other than the first two 5506 /// levels differ e.g. char ** -> const char **, but we accept them as an 5507 /// extension. 5508 IncompatibleNestedPointerQualifiers, 5509 5510 /// IncompatibleVectors - The assignment is between two vector types that 5511 /// have the same size, which we accept as an extension. 5512 IncompatibleVectors, 5513 5514 /// IntToBlockPointer - The assignment converts an int to a block 5515 /// pointer. We disallow this. 5516 IntToBlockPointer, 5517 5518 /// IncompatibleBlockPointer - The assignment is between two block 5519 /// pointers types that are not compatible. 5520 IncompatibleBlockPointer, 5521 5522 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5523 /// id type and something else (that is incompatible with it). For example, 5524 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5525 IncompatibleObjCQualifiedId, 5526 5527 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 5528 /// object with __weak qualifier. 5529 IncompatibleObjCWeakRef, 5530 5531 /// Incompatible - We reject this conversion outright, it is invalid to 5532 /// represent it in the AST. 5533 Incompatible 5534 }; 5535 5536 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5537 /// assignment conversion type specified by ConvTy. This returns true if the 5538 /// conversion was invalid or false if the conversion was accepted. 5539 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5540 SourceLocation Loc, 5541 QualType DstType, QualType SrcType, 5542 Expr *SrcExpr, AssignmentAction Action, 5543 bool *Complained = 0); 5544 5545 /// CheckAssignmentConstraints - Perform type checking for assignment, 5546 /// argument passing, variable initialization, and function return values. 5547 /// C99 6.5.16. 5548 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5549 QualType lhs, QualType rhs); 5550 5551 /// Check assignment constraints and prepare for a conversion of the 5552 /// RHS to the LHS type. 5553 AssignConvertType CheckAssignmentConstraints(QualType lhs, ExprResult &rhs, 5554 CastKind &Kind); 5555 5556 // CheckSingleAssignmentConstraints - Currently used by 5557 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5558 // this routine performs the default function/array converions. 5559 AssignConvertType CheckSingleAssignmentConstraints(QualType lhs, 5560 ExprResult &rExprRes); 5561 5562 // \brief If the lhs type is a transparent union, check whether we 5563 // can initialize the transparent union with the given expression. 5564 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType lhs, 5565 ExprResult &rExpr); 5566 5567 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5568 5569 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5570 5571 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5572 AssignmentAction Action, 5573 bool AllowExplicit = false); 5574 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5575 AssignmentAction Action, 5576 bool AllowExplicit, 5577 ImplicitConversionSequence& ICS); 5578 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5579 const ImplicitConversionSequence& ICS, 5580 AssignmentAction Action, 5581 CheckedConversionKind CCK 5582 = CCK_ImplicitConversion); 5583 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5584 const StandardConversionSequence& SCS, 5585 AssignmentAction Action, 5586 CheckedConversionKind CCK); 5587 5588 /// the following "Check" methods will return a valid/converted QualType 5589 /// or a null QualType (indicating an error diagnostic was issued). 5590 5591 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5592 QualType InvalidOperands(SourceLocation l, ExprResult &lex, ExprResult &rex); 5593 QualType CheckPointerToMemberOperands( // C++ 5.5 5594 ExprResult &lex, ExprResult &rex, ExprValueKind &VK, 5595 SourceLocation OpLoc, bool isIndirect); 5596 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5597 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign, 5598 bool isDivide); 5599 QualType CheckRemainderOperands( // C99 6.5.5 5600 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 5601 QualType CheckAdditionOperands( // C99 6.5.6 5602 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 5603 QualType CheckSubtractionOperands( // C99 6.5.6 5604 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 5605 QualType CheckShiftOperands( // C99 6.5.7 5606 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 5607 bool isCompAssign = false); 5608 QualType CheckCompareOperands( // C99 6.5.8/9 5609 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 5610 bool isRelational); 5611 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 5612 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 5613 QualType CheckLogicalOperands( // C99 6.5.[13,14] 5614 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc); 5615 // CheckAssignmentOperands is used for both simple and compound assignment. 5616 // For simple assignment, pass both expressions and a null converted type. 5617 // For compound assignment, pass both expressions and the converted type. 5618 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 5619 Expr *lex, ExprResult &rex, SourceLocation OpLoc, QualType convertedType); 5620 5621 void ConvertPropertyForLValue(ExprResult &LHS, ExprResult &RHS, QualType& LHSTy); 5622 ExprResult ConvertPropertyForRValue(Expr *E); 5623 5624 QualType CheckConditionalOperands( // C99 6.5.15 5625 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5626 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5627 QualType CXXCheckConditionalOperands( // C++ 5.16 5628 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5629 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5630 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 5631 bool *NonStandardCompositeType = 0); 5632 QualType FindCompositePointerType(SourceLocation Loc, ExprResult &E1, ExprResult &E2, 5633 bool *NonStandardCompositeType = 0) { 5634 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 5635 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, NonStandardCompositeType); 5636 E1 = Owned(E1Tmp); 5637 E2 = Owned(E2Tmp); 5638 return Composite; 5639 } 5640 5641 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5642 SourceLocation questionLoc); 5643 5644 bool DiagnoseConditionalForNull(Expr *LHS, Expr *RHS, 5645 SourceLocation QuestionLoc); 5646 5647 /// type checking for vector binary operators. 5648 QualType CheckVectorOperands(ExprResult &lex, ExprResult &rex, 5649 SourceLocation Loc, bool isCompAssign); 5650 QualType CheckVectorCompareOperands(ExprResult &lex, ExprResult &rx, 5651 SourceLocation l, bool isRel); 5652 5653 /// type checking declaration initializers (C99 6.7.8) 5654 bool CheckInitList(const InitializedEntity &Entity, 5655 InitListExpr *&InitList, QualType &DeclType); 5656 bool CheckForConstantInitializer(Expr *e, QualType t); 5657 5658 // type checking C++ declaration initializers (C++ [dcl.init]). 5659 5660 /// ReferenceCompareResult - Expresses the result of comparing two 5661 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5662 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5663 enum ReferenceCompareResult { 5664 /// Ref_Incompatible - The two types are incompatible, so direct 5665 /// reference binding is not possible. 5666 Ref_Incompatible = 0, 5667 /// Ref_Related - The two types are reference-related, which means 5668 /// that their unqualified forms (T1 and T2) are either the same 5669 /// or T1 is a base class of T2. 5670 Ref_Related, 5671 /// Ref_Compatible_With_Added_Qualification - The two types are 5672 /// reference-compatible with added qualification, meaning that 5673 /// they are reference-compatible and the qualifiers on T1 (cv1) 5674 /// are greater than the qualifiers on T2 (cv2). 5675 Ref_Compatible_With_Added_Qualification, 5676 /// Ref_Compatible - The two types are reference-compatible and 5677 /// have equivalent qualifiers (cv1 == cv2). 5678 Ref_Compatible 5679 }; 5680 5681 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 5682 QualType T1, QualType T2, 5683 bool &DerivedToBase, 5684 bool &ObjCConversion, 5685 bool &ObjCLifetimeConversion); 5686 5687 /// CheckCastTypes - Check type constraints for casting between types under 5688 /// C semantics, or forward to CXXCheckCStyleCast in C++. 5689 ExprResult CheckCastTypes(SourceLocation CastStartLoc, SourceRange TyRange, 5690 QualType CastTy, Expr *CastExpr, CastKind &Kind, 5691 ExprValueKind &VK, CXXCastPath &BasePath, 5692 bool FunctionalStyle = false); 5693 5694 ExprResult checkUnknownAnyCast(SourceRange TyRange, QualType castType, 5695 Expr *castExpr, CastKind &castKind, 5696 ExprValueKind &valueKind, CXXCastPath &BasePath); 5697 5698 // CheckVectorCast - check type constraints for vectors. 5699 // Since vectors are an extension, there are no C standard reference for this. 5700 // We allow casting between vectors and integer datatypes of the same size. 5701 // returns true if the cast is invalid 5702 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 5703 CastKind &Kind); 5704 5705 // CheckExtVectorCast - check type constraints for extended vectors. 5706 // Since vectors are an extension, there are no C standard reference for this. 5707 // We allow casting between vectors and integer datatypes of the same size, 5708 // or vectors and the element type of that vector. 5709 // returns the cast expr 5710 ExprResult CheckExtVectorCast(SourceRange R, QualType VectorTy, Expr *CastExpr, 5711 CastKind &Kind); 5712 5713 /// CXXCheckCStyleCast - Check constraints of a C-style or function-style 5714 /// cast under C++ semantics. 5715 ExprResult CXXCheckCStyleCast(SourceRange R, QualType CastTy, ExprValueKind &VK, 5716 Expr *CastExpr, CastKind &Kind, 5717 CXXCastPath &BasePath, bool FunctionalStyle); 5718 5719 /// \brief Checks for valid expressions which can be cast to an ObjC 5720 /// pointer without needing a bridge cast. 5721 bool ValidObjCARCNoBridgeCastExpr(Expr *&Exp, QualType castType); 5722 5723 /// \brief Checks for invalid conversions and casts between 5724 /// retainable pointers and other pointer kinds. 5725 void CheckObjCARCConversion(SourceRange castRange, QualType castType, 5726 Expr *&op, CheckedConversionKind CCK); 5727 5728 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 5729 QualType ExprType); 5730 5731 /// checkRetainCycles - Check whether an Objective-C message send 5732 /// might create an obvious retain cycle. 5733 void checkRetainCycles(ObjCMessageExpr *msg); 5734 void checkRetainCycles(Expr *receiver, Expr *argument); 5735 5736 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 5737 /// to weak/__unsafe_unretained type. 5738 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 5739 5740 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 5741 /// to weak/__unsafe_unretained expression. 5742 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 5743 5744 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 5745 /// \param Method - May be null. 5746 /// \param [out] ReturnType - The return type of the send. 5747 /// \return true iff there were any incompatible types. 5748 bool CheckMessageArgumentTypes(QualType ReceiverType, 5749 Expr **Args, unsigned NumArgs, Selector Sel, 5750 ObjCMethodDecl *Method, bool isClassMessage, 5751 bool isSuperMessage, 5752 SourceLocation lbrac, SourceLocation rbrac, 5753 QualType &ReturnType, ExprValueKind &VK); 5754 5755 /// \brief Determine the result of a message send expression based on 5756 /// the type of the receiver, the method expected to receive the message, 5757 /// and the form of the message send. 5758 QualType getMessageSendResultType(QualType ReceiverType, 5759 ObjCMethodDecl *Method, 5760 bool isClassMessage, bool isSuperMessage); 5761 5762 /// \brief If the given expression involves a message send to a method 5763 /// with a related result type, emit a note describing what happened. 5764 void EmitRelatedResultTypeNote(const Expr *E); 5765 5766 /// CheckBooleanCondition - Diagnose problems involving the use of 5767 /// the given expression as a boolean condition (e.g. in an if 5768 /// statement). Also performs the standard function and array 5769 /// decays, possibly changing the input variable. 5770 /// 5771 /// \param Loc - A location associated with the condition, e.g. the 5772 /// 'if' keyword. 5773 /// \return true iff there were any errors 5774 ExprResult CheckBooleanCondition(Expr *CondExpr, SourceLocation Loc); 5775 5776 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 5777 Expr *SubExpr); 5778 5779 /// DiagnoseAssignmentAsCondition - Given that an expression is 5780 /// being used as a boolean condition, warn if it's an assignment. 5781 void DiagnoseAssignmentAsCondition(Expr *E); 5782 5783 /// \brief Redundant parentheses over an equality comparison can indicate 5784 /// that the user intended an assignment used as condition. 5785 void DiagnoseEqualityWithExtraParens(ParenExpr *parenE); 5786 5787 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 5788 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 5789 5790 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 5791 /// the specified width and sign. If an overflow occurs, detect it and emit 5792 /// the specified diagnostic. 5793 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 5794 unsigned NewWidth, bool NewSign, 5795 SourceLocation Loc, unsigned DiagID); 5796 5797 /// Checks that the Objective-C declaration is declared in the global scope. 5798 /// Emits an error and marks the declaration as invalid if it's not declared 5799 /// in the global scope. 5800 bool CheckObjCDeclScope(Decl *D); 5801 5802 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 5803 /// and reports the appropriate diagnostics. Returns false on success. 5804 /// Can optionally return the value of the expression. 5805 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 5806 5807 /// VerifyBitField - verifies that a bit field expression is an ICE and has 5808 /// the correct width, and that the field type is valid. 5809 /// Returns false on success. 5810 /// Can optionally return whether the bit-field is of width 0 5811 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 5812 QualType FieldTy, const Expr *BitWidth, 5813 bool *ZeroWidth = 0); 5814 5815 /// \name Code completion 5816 //@{ 5817 /// \brief Describes the context in which code completion occurs. 5818 enum ParserCompletionContext { 5819 /// \brief Code completion occurs at top-level or namespace context. 5820 PCC_Namespace, 5821 /// \brief Code completion occurs within a class, struct, or union. 5822 PCC_Class, 5823 /// \brief Code completion occurs within an Objective-C interface, protocol, 5824 /// or category. 5825 PCC_ObjCInterface, 5826 /// \brief Code completion occurs within an Objective-C implementation or 5827 /// category implementation 5828 PCC_ObjCImplementation, 5829 /// \brief Code completion occurs within the list of instance variables 5830 /// in an Objective-C interface, protocol, category, or implementation. 5831 PCC_ObjCInstanceVariableList, 5832 /// \brief Code completion occurs following one or more template 5833 /// headers. 5834 PCC_Template, 5835 /// \brief Code completion occurs following one or more template 5836 /// headers within a class. 5837 PCC_MemberTemplate, 5838 /// \brief Code completion occurs within an expression. 5839 PCC_Expression, 5840 /// \brief Code completion occurs within a statement, which may 5841 /// also be an expression or a declaration. 5842 PCC_Statement, 5843 /// \brief Code completion occurs at the beginning of the 5844 /// initialization statement (or expression) in a for loop. 5845 PCC_ForInit, 5846 /// \brief Code completion occurs within the condition of an if, 5847 /// while, switch, or for statement. 5848 PCC_Condition, 5849 /// \brief Code completion occurs within the body of a function on a 5850 /// recovery path, where we do not have a specific handle on our position 5851 /// in the grammar. 5852 PCC_RecoveryInFunction, 5853 /// \brief Code completion occurs where only a type is permitted. 5854 PCC_Type, 5855 /// \brief Code completion occurs in a parenthesized expression, which 5856 /// might also be a type cast. 5857 PCC_ParenthesizedExpression, 5858 /// \brief Code completion occurs within a sequence of declaration 5859 /// specifiers within a function, method, or block. 5860 PCC_LocalDeclarationSpecifiers 5861 }; 5862 5863 void CodeCompleteOrdinaryName(Scope *S, 5864 ParserCompletionContext CompletionContext); 5865 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 5866 bool AllowNonIdentifiers, 5867 bool AllowNestedNameSpecifiers); 5868 5869 struct CodeCompleteExpressionData; 5870 void CodeCompleteExpression(Scope *S, 5871 const CodeCompleteExpressionData &Data); 5872 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 5873 SourceLocation OpLoc, 5874 bool IsArrow); 5875 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 5876 void CodeCompleteTag(Scope *S, unsigned TagSpec); 5877 void CodeCompleteTypeQualifiers(DeclSpec &DS); 5878 void CodeCompleteCase(Scope *S); 5879 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 5880 void CodeCompleteInitializer(Scope *S, Decl *D); 5881 void CodeCompleteReturn(Scope *S); 5882 void CodeCompleteAfterIf(Scope *S); 5883 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 5884 5885 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 5886 bool EnteringContext); 5887 void CodeCompleteUsing(Scope *S); 5888 void CodeCompleteUsingDirective(Scope *S); 5889 void CodeCompleteNamespaceDecl(Scope *S); 5890 void CodeCompleteNamespaceAliasDecl(Scope *S); 5891 void CodeCompleteOperatorName(Scope *S); 5892 void CodeCompleteConstructorInitializer(Decl *Constructor, 5893 CXXCtorInitializer** Initializers, 5894 unsigned NumInitializers); 5895 5896 void CodeCompleteObjCAtDirective(Scope *S); 5897 void CodeCompleteObjCAtVisibility(Scope *S); 5898 void CodeCompleteObjCAtStatement(Scope *S); 5899 void CodeCompleteObjCAtExpression(Scope *S); 5900 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 5901 void CodeCompleteObjCPropertyGetter(Scope *S); 5902 void CodeCompleteObjCPropertySetter(Scope *S); 5903 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 5904 bool IsParameter); 5905 void CodeCompleteObjCMessageReceiver(Scope *S); 5906 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 5907 IdentifierInfo **SelIdents, 5908 unsigned NumSelIdents, 5909 bool AtArgumentExpression); 5910 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 5911 IdentifierInfo **SelIdents, 5912 unsigned NumSelIdents, 5913 bool AtArgumentExpression, 5914 bool IsSuper = false); 5915 void CodeCompleteObjCInstanceMessage(Scope *S, ExprTy *Receiver, 5916 IdentifierInfo **SelIdents, 5917 unsigned NumSelIdents, 5918 bool AtArgumentExpression, 5919 ObjCInterfaceDecl *Super = 0); 5920 void CodeCompleteObjCForCollection(Scope *S, 5921 DeclGroupPtrTy IterationVar); 5922 void CodeCompleteObjCSelector(Scope *S, 5923 IdentifierInfo **SelIdents, 5924 unsigned NumSelIdents); 5925 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 5926 unsigned NumProtocols); 5927 void CodeCompleteObjCProtocolDecl(Scope *S); 5928 void CodeCompleteObjCInterfaceDecl(Scope *S); 5929 void CodeCompleteObjCSuperclass(Scope *S, 5930 IdentifierInfo *ClassName, 5931 SourceLocation ClassNameLoc); 5932 void CodeCompleteObjCImplementationDecl(Scope *S); 5933 void CodeCompleteObjCInterfaceCategory(Scope *S, 5934 IdentifierInfo *ClassName, 5935 SourceLocation ClassNameLoc); 5936 void CodeCompleteObjCImplementationCategory(Scope *S, 5937 IdentifierInfo *ClassName, 5938 SourceLocation ClassNameLoc); 5939 void CodeCompleteObjCPropertyDefinition(Scope *S); 5940 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 5941 IdentifierInfo *PropertyName); 5942 void CodeCompleteObjCMethodDecl(Scope *S, 5943 bool IsInstanceMethod, 5944 ParsedType ReturnType); 5945 void CodeCompleteObjCMethodDeclSelector(Scope *S, 5946 bool IsInstanceMethod, 5947 bool AtParameterName, 5948 ParsedType ReturnType, 5949 IdentifierInfo **SelIdents, 5950 unsigned NumSelIdents); 5951 void CodeCompletePreprocessorDirective(bool InConditional); 5952 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 5953 void CodeCompletePreprocessorMacroName(bool IsDefinition); 5954 void CodeCompletePreprocessorExpression(); 5955 void CodeCompletePreprocessorMacroArgument(Scope *S, 5956 IdentifierInfo *Macro, 5957 MacroInfo *MacroInfo, 5958 unsigned Argument); 5959 void CodeCompleteNaturalLanguage(); 5960 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 5961 SmallVectorImpl<CodeCompletionResult> &Results); 5962 //@} 5963 5964 //===--------------------------------------------------------------------===// 5965 // Extra semantic analysis beyond the C type system 5966 5967public: 5968 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 5969 unsigned ByteNo) const; 5970 5971private: 5972 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr, 5973 bool isSubscript=false, bool AllowOnePastEnd=true); 5974 void CheckArrayAccess(const Expr *E); 5975 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 5976 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 5977 5978 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 5979 bool CheckObjCString(Expr *Arg); 5980 5981 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5982 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5983 5984 bool SemaBuiltinVAStart(CallExpr *TheCall); 5985 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 5986 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 5987 5988public: 5989 // Used by C++ template instantiation. 5990 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 5991 5992private: 5993 bool SemaBuiltinPrefetch(CallExpr *TheCall); 5994 bool SemaBuiltinObjectSize(CallExpr *TheCall); 5995 bool SemaBuiltinLongjmp(CallExpr *TheCall); 5996 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 5997 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 5998 llvm::APSInt &Result); 5999 6000 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 6001 bool HasVAListArg, unsigned format_idx, 6002 unsigned firstDataArg, bool isPrintf); 6003 6004 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 6005 const CallExpr *TheCall, bool HasVAListArg, 6006 unsigned format_idx, unsigned firstDataArg, 6007 bool isPrintf); 6008 6009 void CheckNonNullArguments(const NonNullAttr *NonNull, 6010 const Expr * const *ExprArgs, 6011 SourceLocation CallSiteLoc); 6012 6013 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 6014 unsigned format_idx, unsigned firstDataArg, 6015 bool isPrintf); 6016 6017 /// \brief Enumeration used to describe which of the memory setting or copying 6018 /// functions is being checked by \c CheckMemaccessArguments(). 6019 enum CheckedMemoryFunction { 6020 CMF_Memset, 6021 CMF_Memcpy, 6022 CMF_Memmove, 6023 CMF_Memcmp 6024 }; 6025 6026 void CheckMemaccessArguments(const CallExpr *Call, CheckedMemoryFunction CMF, 6027 IdentifierInfo *FnName); 6028 6029 void CheckStrlcpycatArguments(const CallExpr *Call, 6030 IdentifierInfo *FnName); 6031 6032 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 6033 SourceLocation ReturnLoc); 6034 void CheckFloatComparison(SourceLocation loc, Expr* lex, Expr* rex); 6035 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 6036 6037 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 6038 Expr *Init); 6039 6040 /// \brief The parser's current scope. 6041 /// 6042 /// The parser maintains this state here. 6043 Scope *CurScope; 6044 6045protected: 6046 friend class Parser; 6047 friend class InitializationSequence; 6048 friend class ASTReader; 6049 friend class ASTWriter; 6050 6051public: 6052 /// \brief Retrieve the parser's current scope. 6053 /// 6054 /// This routine must only be used when it is certain that semantic analysis 6055 /// and the parser are in precisely the same context, which is not the case 6056 /// when, e.g., we are performing any kind of template instantiation. 6057 /// Therefore, the only safe places to use this scope are in the parser 6058 /// itself and in routines directly invoked from the parser and *never* from 6059 /// template substitution or instantiation. 6060 Scope *getCurScope() const { return CurScope; } 6061 6062 Decl *getObjCDeclContext() const; 6063}; 6064 6065/// \brief RAII object that enters a new expression evaluation context. 6066class EnterExpressionEvaluationContext { 6067 Sema &Actions; 6068 6069public: 6070 EnterExpressionEvaluationContext(Sema &Actions, 6071 Sema::ExpressionEvaluationContext NewContext) 6072 : Actions(Actions) { 6073 Actions.PushExpressionEvaluationContext(NewContext); 6074 } 6075 6076 ~EnterExpressionEvaluationContext() { 6077 Actions.PopExpressionEvaluationContext(); 6078 } 6079}; 6080 6081} // end namespace clang 6082 6083#endif 6084