Sema.h revision 900693b715b3832a42ae87157332baece94ccdd8
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 void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope); 1060 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1061 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1062 1063 /// \brief Diagnose any unused parameters in the given sequence of 1064 /// ParmVarDecl pointers. 1065 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1066 ParmVarDecl * const *End); 1067 1068 /// \brief Diagnose whether the size of parameters or return value of a 1069 /// function or obj-c method definition is pass-by-value and larger than a 1070 /// specified threshold. 1071 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1072 ParmVarDecl * const *End, 1073 QualType ReturnTy, 1074 NamedDecl *D); 1075 1076 void DiagnoseInvalidJumps(Stmt *Body); 1077 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1078 SourceLocation AsmLoc, 1079 SourceLocation RParenLoc); 1080 1081 /// \brief The parser has processed a module import declaration. 1082 /// 1083 /// \param ImportLoc The location of the '__import_module__' keyword. 1084 /// 1085 /// \param ModuleName The name of the module. 1086 /// 1087 /// \param ModuleNameLoc The location of the module name. 1088 DeclResult ActOnModuleImport(SourceLocation ImportLoc, 1089 IdentifierInfo &ModuleName, 1090 SourceLocation ModuleNameLoc); 1091 1092 /// Scope actions. 1093 void ActOnPopScope(SourceLocation Loc, Scope *S); 1094 void ActOnTranslationUnitScope(Scope *S); 1095 1096 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1097 DeclSpec &DS); 1098 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1099 DeclSpec &DS, 1100 MultiTemplateParamsArg TemplateParams); 1101 1102 StmtResult ActOnVlaStmt(const DeclSpec &DS); 1103 1104 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1105 AccessSpecifier AS, 1106 RecordDecl *Record); 1107 1108 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1109 RecordDecl *Record); 1110 1111 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1112 TagTypeKind NewTag, bool isDefinition, 1113 SourceLocation NewTagLoc, 1114 const IdentifierInfo &Name); 1115 1116 enum TagUseKind { 1117 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1118 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1119 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1120 TUK_Friend // Friend declaration: 'friend struct foo;' 1121 }; 1122 1123 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1124 SourceLocation KWLoc, CXXScopeSpec &SS, 1125 IdentifierInfo *Name, SourceLocation NameLoc, 1126 AttributeList *Attr, AccessSpecifier AS, 1127 MultiTemplateParamsArg TemplateParameterLists, 1128 bool &OwnedDecl, bool &IsDependent, bool ScopedEnum, 1129 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1130 1131 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1132 unsigned TagSpec, SourceLocation TagLoc, 1133 CXXScopeSpec &SS, 1134 IdentifierInfo *Name, SourceLocation NameLoc, 1135 AttributeList *Attr, 1136 MultiTemplateParamsArg TempParamLists); 1137 1138 TypeResult ActOnDependentTag(Scope *S, 1139 unsigned TagSpec, 1140 TagUseKind TUK, 1141 const CXXScopeSpec &SS, 1142 IdentifierInfo *Name, 1143 SourceLocation TagLoc, 1144 SourceLocation NameLoc); 1145 1146 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1147 IdentifierInfo *ClassName, 1148 SmallVectorImpl<Decl *> &Decls); 1149 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1150 Declarator &D, Expr *BitfieldWidth); 1151 1152 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1153 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1154 AccessSpecifier AS); 1155 1156 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1157 TypeSourceInfo *TInfo, 1158 RecordDecl *Record, SourceLocation Loc, 1159 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1160 SourceLocation TSSL, 1161 AccessSpecifier AS, NamedDecl *PrevDecl, 1162 Declarator *D = 0); 1163 1164 enum CXXSpecialMember { 1165 CXXDefaultConstructor, 1166 CXXCopyConstructor, 1167 CXXMoveConstructor, 1168 CXXCopyAssignment, 1169 CXXMoveAssignment, 1170 CXXDestructor, 1171 CXXInvalid 1172 }; 1173 bool CheckNontrivialField(FieldDecl *FD); 1174 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1175 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1176 void ActOnLastBitfield(SourceLocation DeclStart, 1177 SmallVectorImpl<Decl *> &AllIvarDecls); 1178 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, 1179 Declarator &D, Expr *BitfieldWidth, 1180 tok::ObjCKeywordKind visibility); 1181 1182 // This is used for both record definitions and ObjC interface declarations. 1183 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1184 Decl **Fields, unsigned NumFields, 1185 SourceLocation LBrac, SourceLocation RBrac, 1186 AttributeList *AttrList); 1187 1188 /// ActOnTagStartDefinition - Invoked when we have entered the 1189 /// scope of a tag's definition (e.g., for an enumeration, class, 1190 /// struct, or union). 1191 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1192 1193 void ActOnObjCContainerStartDefinition(Decl *IDecl); 1194 1195 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1196 /// C++ record definition's base-specifiers clause and are starting its 1197 /// member declarations. 1198 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1199 SourceLocation FinalLoc, 1200 SourceLocation LBraceLoc); 1201 1202 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1203 /// the definition of a tag (enumeration, class, struct, or union). 1204 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1205 SourceLocation RBraceLoc); 1206 1207 void ActOnObjCContainerFinishDefinition(); 1208 1209 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1210 /// error parsing the definition of a tag. 1211 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1212 1213 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1214 EnumConstantDecl *LastEnumConst, 1215 SourceLocation IdLoc, 1216 IdentifierInfo *Id, 1217 Expr *val); 1218 1219 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1220 SourceLocation IdLoc, IdentifierInfo *Id, 1221 AttributeList *Attrs, 1222 SourceLocation EqualLoc, Expr *Val); 1223 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1224 SourceLocation RBraceLoc, Decl *EnumDecl, 1225 Decl **Elements, unsigned NumElements, 1226 Scope *S, AttributeList *Attr); 1227 1228 DeclContext *getContainingDC(DeclContext *DC); 1229 1230 /// Set the current declaration context until it gets popped. 1231 void PushDeclContext(Scope *S, DeclContext *DC); 1232 void PopDeclContext(); 1233 1234 /// EnterDeclaratorContext - Used when we must lookup names in the context 1235 /// of a declarator's nested name specifier. 1236 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1237 void ExitDeclaratorContext(Scope *S); 1238 1239 DeclContext *getFunctionLevelDeclContext(); 1240 1241 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1242 /// to the function decl for the function being parsed. If we're currently 1243 /// in a 'block', this returns the containing context. 1244 FunctionDecl *getCurFunctionDecl(); 1245 1246 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1247 /// the method decl for the method being parsed. If we're currently 1248 /// in a 'block', this returns the containing context. 1249 ObjCMethodDecl *getCurMethodDecl(); 1250 1251 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1252 /// or C function we're in, otherwise return null. If we're currently 1253 /// in a 'block', this returns the containing context. 1254 NamedDecl *getCurFunctionOrMethodDecl(); 1255 1256 /// Add this decl to the scope shadowed decl chains. 1257 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1258 1259 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1260 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1261 /// true if 'D' belongs to the given declaration context. 1262 /// 1263 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1264 /// whether the declaration is in scope for the purposes of explicit template 1265 /// instantiation or specialization. The default is false. 1266 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1267 bool ExplicitInstantiationOrSpecialization = false); 1268 1269 /// Finds the scope corresponding to the given decl context, if it 1270 /// happens to be an enclosing scope. Otherwise return NULL. 1271 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1272 1273 /// Subroutines of ActOnDeclarator(). 1274 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1275 TypeSourceInfo *TInfo); 1276 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1277 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1278 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1279 void mergeObjCMethodDecls(ObjCMethodDecl *New, const ObjCMethodDecl *Old); 1280 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1281 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1282 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1283 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1284 1285 // AssignmentAction - This is used by all the assignment diagnostic functions 1286 // to represent what is actually causing the operation 1287 enum AssignmentAction { 1288 AA_Assigning, 1289 AA_Passing, 1290 AA_Returning, 1291 AA_Converting, 1292 AA_Initializing, 1293 AA_Sending, 1294 AA_Casting 1295 }; 1296 1297 /// C++ Overloading. 1298 enum OverloadKind { 1299 /// This is a legitimate overload: the existing declarations are 1300 /// functions or function templates with different signatures. 1301 Ovl_Overload, 1302 1303 /// This is not an overload because the signature exactly matches 1304 /// an existing declaration. 1305 Ovl_Match, 1306 1307 /// This is not an overload because the lookup results contain a 1308 /// non-function. 1309 Ovl_NonFunction 1310 }; 1311 OverloadKind CheckOverload(Scope *S, 1312 FunctionDecl *New, 1313 const LookupResult &OldDecls, 1314 NamedDecl *&OldDecl, 1315 bool IsForUsingDecl); 1316 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1317 1318 /// \brief Checks availability of the function depending on the current 1319 /// function context.Inside an unavailable function,unavailability is ignored. 1320 /// 1321 /// \returns true if \arg FD is unavailable and current context is inside 1322 /// an available function, false otherwise. 1323 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1324 1325 ImplicitConversionSequence 1326 TryImplicitConversion(Expr *From, QualType ToType, 1327 bool SuppressUserConversions, 1328 bool AllowExplicit, 1329 bool InOverloadResolution, 1330 bool CStyle, 1331 bool AllowObjCWritebackConversion); 1332 1333 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1334 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1335 bool IsComplexPromotion(QualType FromType, QualType ToType); 1336 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1337 bool InOverloadResolution, 1338 QualType& ConvertedType, bool &IncompatibleObjC); 1339 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1340 QualType& ConvertedType, bool &IncompatibleObjC); 1341 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1342 QualType &ConvertedType); 1343 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1344 QualType& ConvertedType); 1345 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1346 const FunctionProtoType *NewType); 1347 1348 bool CheckPointerConversion(Expr *From, QualType ToType, 1349 CastKind &Kind, 1350 CXXCastPath& BasePath, 1351 bool IgnoreBaseAccess); 1352 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1353 bool InOverloadResolution, 1354 QualType &ConvertedType); 1355 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1356 CastKind &Kind, 1357 CXXCastPath &BasePath, 1358 bool IgnoreBaseAccess); 1359 bool IsQualificationConversion(QualType FromType, QualType ToType, 1360 bool CStyle, bool &ObjCLifetimeConversion); 1361 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1362 QualType &ResultTy); 1363 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1364 1365 1366 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1367 const VarDecl *NRVOCandidate, 1368 QualType ResultType, 1369 Expr *Value, 1370 bool AllowNRVO = true); 1371 1372 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1373 ExprResult Init); 1374 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1375 SourceLocation EqualLoc, 1376 ExprResult Init, 1377 bool TopLevelOfInitList = false); 1378 ExprResult PerformObjectArgumentInitialization(Expr *From, 1379 NestedNameSpecifier *Qualifier, 1380 NamedDecl *FoundDecl, 1381 CXXMethodDecl *Method); 1382 1383 ExprResult PerformContextuallyConvertToBool(Expr *From); 1384 ExprResult PerformContextuallyConvertToObjCId(Expr *From); 1385 1386 ExprResult 1387 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1388 const PartialDiagnostic &NotIntDiag, 1389 const PartialDiagnostic &IncompleteDiag, 1390 const PartialDiagnostic &ExplicitConvDiag, 1391 const PartialDiagnostic &ExplicitConvNote, 1392 const PartialDiagnostic &AmbigDiag, 1393 const PartialDiagnostic &AmbigNote, 1394 const PartialDiagnostic &ConvDiag); 1395 1396 ExprResult PerformObjectMemberConversion(Expr *From, 1397 NestedNameSpecifier *Qualifier, 1398 NamedDecl *FoundDecl, 1399 NamedDecl *Member); 1400 1401 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1402 // TODO: make this is a typesafe union. 1403 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1404 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1405 1406 void AddOverloadCandidate(NamedDecl *Function, 1407 DeclAccessPair FoundDecl, 1408 Expr **Args, unsigned NumArgs, 1409 OverloadCandidateSet &CandidateSet); 1410 1411 void AddOverloadCandidate(FunctionDecl *Function, 1412 DeclAccessPair FoundDecl, 1413 Expr **Args, unsigned NumArgs, 1414 OverloadCandidateSet& CandidateSet, 1415 bool SuppressUserConversions = false, 1416 bool PartialOverloading = false); 1417 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1418 Expr **Args, unsigned NumArgs, 1419 OverloadCandidateSet& CandidateSet, 1420 bool SuppressUserConversions = false); 1421 void AddMethodCandidate(DeclAccessPair FoundDecl, 1422 QualType ObjectType, 1423 Expr::Classification ObjectClassification, 1424 Expr **Args, unsigned NumArgs, 1425 OverloadCandidateSet& CandidateSet, 1426 bool SuppressUserConversion = false); 1427 void AddMethodCandidate(CXXMethodDecl *Method, 1428 DeclAccessPair FoundDecl, 1429 CXXRecordDecl *ActingContext, QualType ObjectType, 1430 Expr::Classification ObjectClassification, 1431 Expr **Args, unsigned NumArgs, 1432 OverloadCandidateSet& CandidateSet, 1433 bool SuppressUserConversions = false); 1434 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1435 DeclAccessPair FoundDecl, 1436 CXXRecordDecl *ActingContext, 1437 TemplateArgumentListInfo *ExplicitTemplateArgs, 1438 QualType ObjectType, 1439 Expr::Classification ObjectClassification, 1440 Expr **Args, unsigned NumArgs, 1441 OverloadCandidateSet& CandidateSet, 1442 bool SuppressUserConversions = false); 1443 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1444 DeclAccessPair FoundDecl, 1445 TemplateArgumentListInfo *ExplicitTemplateArgs, 1446 Expr **Args, unsigned NumArgs, 1447 OverloadCandidateSet& CandidateSet, 1448 bool SuppressUserConversions = false); 1449 void AddConversionCandidate(CXXConversionDecl *Conversion, 1450 DeclAccessPair FoundDecl, 1451 CXXRecordDecl *ActingContext, 1452 Expr *From, QualType ToType, 1453 OverloadCandidateSet& CandidateSet); 1454 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1455 DeclAccessPair FoundDecl, 1456 CXXRecordDecl *ActingContext, 1457 Expr *From, QualType ToType, 1458 OverloadCandidateSet &CandidateSet); 1459 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1460 DeclAccessPair FoundDecl, 1461 CXXRecordDecl *ActingContext, 1462 const FunctionProtoType *Proto, 1463 Expr *Object, Expr **Args, unsigned NumArgs, 1464 OverloadCandidateSet& CandidateSet); 1465 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1466 SourceLocation OpLoc, 1467 Expr **Args, unsigned NumArgs, 1468 OverloadCandidateSet& CandidateSet, 1469 SourceRange OpRange = SourceRange()); 1470 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1471 Expr **Args, unsigned NumArgs, 1472 OverloadCandidateSet& CandidateSet, 1473 bool IsAssignmentOperator = false, 1474 unsigned NumContextualBoolArguments = 0); 1475 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1476 SourceLocation OpLoc, 1477 Expr **Args, unsigned NumArgs, 1478 OverloadCandidateSet& CandidateSet); 1479 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1480 bool Operator, 1481 Expr **Args, unsigned NumArgs, 1482 TemplateArgumentListInfo *ExplicitTemplateArgs, 1483 OverloadCandidateSet& CandidateSet, 1484 bool PartialOverloading = false, 1485 bool StdNamespaceIsAssociated = false); 1486 1487 // Emit as a 'note' the specific overload candidate 1488 void NoteOverloadCandidate(FunctionDecl *Fn); 1489 1490 // Emit as a series of 'note's all template and non-templates 1491 // identified by the expression Expr 1492 void NoteAllOverloadCandidates(Expr* E); 1493 1494 // [PossiblyAFunctionType] --> [Return] 1495 // NonFunctionType --> NonFunctionType 1496 // R (A) --> R(A) 1497 // R (*)(A) --> R (A) 1498 // R (&)(A) --> R (A) 1499 // R (S::*)(A) --> R (A) 1500 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1501 1502 FunctionDecl *ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, QualType TargetType, 1503 bool Complain, 1504 DeclAccessPair &Found); 1505 1506 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1507 bool Complain = false, 1508 DeclAccessPair* Found = 0); 1509 1510 ExprResult ResolveAndFixSingleFunctionTemplateSpecialization( 1511 Expr *SrcExpr, bool DoFunctionPointerConverion = false, 1512 bool Complain = false, 1513 const SourceRange& OpRangeForComplaining = SourceRange(), 1514 QualType DestTypeForComplaining = QualType(), 1515 unsigned DiagIDForComplaining = 0); 1516 1517 1518 Expr *FixOverloadedFunctionReference(Expr *E, 1519 DeclAccessPair FoundDecl, 1520 FunctionDecl *Fn); 1521 ExprResult FixOverloadedFunctionReference(ExprResult, 1522 DeclAccessPair FoundDecl, 1523 FunctionDecl *Fn); 1524 1525 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1526 Expr **Args, unsigned NumArgs, 1527 OverloadCandidateSet &CandidateSet, 1528 bool PartialOverloading = false); 1529 1530 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1531 UnresolvedLookupExpr *ULE, 1532 SourceLocation LParenLoc, 1533 Expr **Args, unsigned NumArgs, 1534 SourceLocation RParenLoc, 1535 Expr *ExecConfig); 1536 1537 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1538 unsigned Opc, 1539 const UnresolvedSetImpl &Fns, 1540 Expr *input); 1541 1542 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1543 unsigned Opc, 1544 const UnresolvedSetImpl &Fns, 1545 Expr *LHS, Expr *RHS); 1546 1547 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1548 SourceLocation RLoc, 1549 Expr *Base,Expr *Idx); 1550 1551 ExprResult 1552 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1553 SourceLocation LParenLoc, Expr **Args, 1554 unsigned NumArgs, SourceLocation RParenLoc); 1555 ExprResult 1556 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1557 Expr **Args, unsigned NumArgs, 1558 SourceLocation RParenLoc); 1559 1560 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1561 SourceLocation OpLoc); 1562 1563 /// CheckCallReturnType - Checks that a call expression's return type is 1564 /// complete. Returns true on failure. The location passed in is the location 1565 /// that best represents the call. 1566 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1567 CallExpr *CE, FunctionDecl *FD); 1568 1569 /// Helpers for dealing with blocks and functions. 1570 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1571 bool CheckParameterNames); 1572 void CheckCXXDefaultArguments(FunctionDecl *FD); 1573 void CheckExtraCXXDefaultArguments(Declarator &D); 1574 Scope *getNonFieldDeclScope(Scope *S); 1575 1576 /// \name Name lookup 1577 /// 1578 /// These routines provide name lookup that is used during semantic 1579 /// analysis to resolve the various kinds of names (identifiers, 1580 /// overloaded operator names, constructor names, etc.) into zero or 1581 /// more declarations within a particular scope. The major entry 1582 /// points are LookupName, which performs unqualified name lookup, 1583 /// and LookupQualifiedName, which performs qualified name lookup. 1584 /// 1585 /// All name lookup is performed based on some specific criteria, 1586 /// which specify what names will be visible to name lookup and how 1587 /// far name lookup should work. These criteria are important both 1588 /// for capturing language semantics (certain lookups will ignore 1589 /// certain names, for example) and for performance, since name 1590 /// lookup is often a bottleneck in the compilation of C++. Name 1591 /// lookup criteria is specified via the LookupCriteria enumeration. 1592 /// 1593 /// The results of name lookup can vary based on the kind of name 1594 /// lookup performed, the current language, and the translation 1595 /// unit. In C, for example, name lookup will either return nothing 1596 /// (no entity found) or a single declaration. In C++, name lookup 1597 /// can additionally refer to a set of overloaded functions or 1598 /// result in an ambiguity. All of the possible results of name 1599 /// lookup are captured by the LookupResult class, which provides 1600 /// the ability to distinguish among them. 1601 //@{ 1602 1603 /// @brief Describes the kind of name lookup to perform. 1604 enum LookupNameKind { 1605 /// Ordinary name lookup, which finds ordinary names (functions, 1606 /// variables, typedefs, etc.) in C and most kinds of names 1607 /// (functions, variables, members, types, etc.) in C++. 1608 LookupOrdinaryName = 0, 1609 /// Tag name lookup, which finds the names of enums, classes, 1610 /// structs, and unions. 1611 LookupTagName, 1612 /// Label name lookup. 1613 LookupLabel, 1614 /// Member name lookup, which finds the names of 1615 /// class/struct/union members. 1616 LookupMemberName, 1617 /// Look up of an operator name (e.g., operator+) for use with 1618 /// operator overloading. This lookup is similar to ordinary name 1619 /// lookup, but will ignore any declarations that are class members. 1620 LookupOperatorName, 1621 /// Look up of a name that precedes the '::' scope resolution 1622 /// operator in C++. This lookup completely ignores operator, object, 1623 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1624 LookupNestedNameSpecifierName, 1625 /// Look up a namespace name within a C++ using directive or 1626 /// namespace alias definition, ignoring non-namespace names (C++ 1627 /// [basic.lookup.udir]p1). 1628 LookupNamespaceName, 1629 /// Look up all declarations in a scope with the given name, 1630 /// including resolved using declarations. This is appropriate 1631 /// for checking redeclarations for a using declaration. 1632 LookupUsingDeclName, 1633 /// Look up an ordinary name that is going to be redeclared as a 1634 /// name with linkage. This lookup ignores any declarations that 1635 /// are outside of the current scope unless they have linkage. See 1636 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1637 LookupRedeclarationWithLinkage, 1638 /// Look up the name of an Objective-C protocol. 1639 LookupObjCProtocolName, 1640 /// Look up implicit 'self' parameter of an objective-c method. 1641 LookupObjCImplicitSelfParam, 1642 /// \brief Look up any declaration with any name. 1643 LookupAnyName 1644 }; 1645 1646 /// \brief Specifies whether (or how) name lookup is being performed for a 1647 /// redeclaration (vs. a reference). 1648 enum RedeclarationKind { 1649 /// \brief The lookup is a reference to this name that is not for the 1650 /// purpose of redeclaring the name. 1651 NotForRedeclaration = 0, 1652 /// \brief The lookup results will be used for redeclaration of a name, 1653 /// if an entity by that name already exists. 1654 ForRedeclaration 1655 }; 1656 1657private: 1658 bool CppLookupName(LookupResult &R, Scope *S); 1659 1660 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1661 CXXSpecialMember SM, 1662 bool ConstArg, 1663 bool VolatileArg, 1664 bool RValueThis, 1665 bool ConstThis, 1666 bool VolatileThis); 1667 1668 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1669 // 1670 // The boolean value will be true to indicate that the namespace was loaded 1671 // from an AST/PCH file, or false otherwise. 1672 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1673 1674 /// \brief Whether we have already loaded known namespaces from an extenal 1675 /// source. 1676 bool LoadedExternalKnownNamespaces; 1677 1678public: 1679 /// \brief Look up a name, looking for a single declaration. Return 1680 /// null if the results were absent, ambiguous, or overloaded. 1681 /// 1682 /// It is preferable to use the elaborated form and explicitly handle 1683 /// ambiguity and overloaded. 1684 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1685 SourceLocation Loc, 1686 LookupNameKind NameKind, 1687 RedeclarationKind Redecl 1688 = NotForRedeclaration); 1689 bool LookupName(LookupResult &R, Scope *S, 1690 bool AllowBuiltinCreation = false); 1691 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1692 bool InUnqualifiedLookup = false); 1693 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1694 bool AllowBuiltinCreation = false, 1695 bool EnteringContext = false); 1696 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1697 1698 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1699 QualType T1, QualType T2, 1700 UnresolvedSetImpl &Functions); 1701 1702 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1703 SourceLocation GnuLabelLoc = SourceLocation()); 1704 1705 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1706 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1707 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1708 unsigned Quals, 1709 bool *ConstParam = 0); 1710 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1711 bool RValueThis, unsigned ThisQuals, 1712 bool *ConstParam = 0); 1713 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class); 1714 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, bool RValueThis, 1715 unsigned ThisQuals); 1716 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1717 1718 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1719 Expr **Args, unsigned NumArgs, 1720 ADLResult &Functions, 1721 bool StdNamespaceIsAssociated = false); 1722 1723 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1724 VisibleDeclConsumer &Consumer, 1725 bool IncludeGlobalScope = true); 1726 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1727 VisibleDeclConsumer &Consumer, 1728 bool IncludeGlobalScope = true); 1729 1730 /// \brief The context in which typo-correction occurs. 1731 /// 1732 /// The typo-correction context affects which keywords (if any) are 1733 /// considered when trying to correct for typos. 1734 enum CorrectTypoContext { 1735 /// \brief An unknown context, where any keyword might be valid. 1736 CTC_Unknown, 1737 /// \brief A context where no keywords are used (e.g. we expect an actual 1738 /// name). 1739 CTC_NoKeywords, 1740 /// \brief A context where we're correcting a type name. 1741 CTC_Type, 1742 /// \brief An expression context. 1743 CTC_Expression, 1744 /// \brief A type cast, or anything else that can be followed by a '<'. 1745 CTC_CXXCasts, 1746 /// \brief A member lookup context. 1747 CTC_MemberLookup, 1748 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1749 CTC_ObjCIvarLookup, 1750 /// \brief An Objective-C property lookup context (e.g., self.prop). 1751 CTC_ObjCPropertyLookup, 1752 /// \brief The receiver of an Objective-C message send within an 1753 /// Objective-C method where 'super' is a valid keyword. 1754 CTC_ObjCMessageReceiver 1755 }; 1756 1757 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1758 Sema::LookupNameKind LookupKind, 1759 Scope *S, CXXScopeSpec *SS, 1760 DeclContext *MemberContext = NULL, 1761 bool EnteringContext = false, 1762 CorrectTypoContext CTC = CTC_Unknown, 1763 const ObjCObjectPointerType *OPT = NULL); 1764 1765 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1766 AssociatedNamespaceSet &AssociatedNamespaces, 1767 AssociatedClassSet &AssociatedClasses); 1768 1769 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1770 bool ConsiderLinkage, 1771 bool ExplicitInstantiationOrSpecialization); 1772 1773 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1774 //@} 1775 1776 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1777 SourceLocation IdLoc, 1778 bool TypoCorrection = false); 1779 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1780 Scope *S, bool ForRedeclaration, 1781 SourceLocation Loc); 1782 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1783 Scope *S); 1784 void AddKnownFunctionAttributes(FunctionDecl *FD); 1785 1786 // More parsing and symbol table subroutines. 1787 1788 // Decl attributes - this routine is the top level dispatcher. 1789 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1790 bool NonInheritable = true, bool Inheritable = true); 1791 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1792 bool NonInheritable = true, bool Inheritable = true); 1793 1794 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1795 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1796 bool CheckNoReturnAttr(const AttributeList &attr); 1797 1798 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1799 bool &IncompleteImpl, unsigned DiagID); 1800 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 1801 ObjCMethodDecl *MethodDecl, 1802 bool IsProtocolMethodDecl, 1803 bool IsDeclaration = false); 1804 1805 /// WarnExactTypedMethods - This routine issues a warning if method 1806 /// implementation declaration matches exactly that of its declaration. 1807 void WarnExactTypedMethods(ObjCMethodDecl *Method, 1808 ObjCMethodDecl *MethodDecl, 1809 bool IsProtocolMethodDecl); 1810 1811 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1812 ObjCInterfaceDecl *IDecl); 1813 1814 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1815 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap; 1816 1817 /// CheckProtocolMethodDefs - This routine checks unimplemented 1818 /// methods declared in protocol, and those referenced by it. 1819 /// \param IDecl - Used for checking for methods which may have been 1820 /// inherited. 1821 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1822 ObjCProtocolDecl *PDecl, 1823 bool& IncompleteImpl, 1824 const SelectorSet &InsMap, 1825 const SelectorSet &ClsMap, 1826 ObjCContainerDecl *CDecl); 1827 1828 /// CheckImplementationIvars - This routine checks if the instance variables 1829 /// listed in the implelementation match those listed in the interface. 1830 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1831 ObjCIvarDecl **Fields, unsigned nIvars, 1832 SourceLocation Loc); 1833 1834 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1835 /// remains unimplemented in the class or category @implementation. 1836 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1837 ObjCContainerDecl* IDecl, 1838 bool IncompleteImpl = false); 1839 1840 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1841 /// which must be implemented by this implementation. 1842 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1843 ObjCContainerDecl *CDecl, 1844 const SelectorSet &InsMap); 1845 1846 /// DefaultSynthesizeProperties - This routine default synthesizes all 1847 /// properties which must be synthesized in class's @implementation. 1848 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1849 ObjCInterfaceDecl *IDecl); 1850 void DefaultSynthesizeProperties(Scope *S, Decl *D); 1851 1852 /// CollectImmediateProperties - This routine collects all properties in 1853 /// the class and its conforming protocols; but not those it its super class. 1854 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1855 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1856 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1857 1858 1859 /// LookupPropertyDecl - Looks up a property in the current class and all 1860 /// its protocols. 1861 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1862 IdentifierInfo *II); 1863 1864 /// Called by ActOnProperty to handle @property declarations in 1865 //// class extensions. 1866 Decl *HandlePropertyInClassExtension(Scope *S, 1867 SourceLocation AtLoc, 1868 FieldDeclarator &FD, 1869 Selector GetterSel, 1870 Selector SetterSel, 1871 const bool isAssign, 1872 const bool isReadWrite, 1873 const unsigned Attributes, 1874 bool *isOverridingProperty, 1875 TypeSourceInfo *T, 1876 tok::ObjCKeywordKind MethodImplKind); 1877 1878 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1879 /// handle creating the ObjcPropertyDecl for a category or @interface. 1880 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1881 ObjCContainerDecl *CDecl, 1882 SourceLocation AtLoc, 1883 FieldDeclarator &FD, 1884 Selector GetterSel, 1885 Selector SetterSel, 1886 const bool isAssign, 1887 const bool isReadWrite, 1888 const unsigned Attributes, 1889 TypeSourceInfo *T, 1890 tok::ObjCKeywordKind MethodImplKind, 1891 DeclContext *lexicalDC = 0); 1892 1893 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1894 /// warning) when atomic property has one but not the other user-declared 1895 /// setter or getter. 1896 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1897 ObjCContainerDecl* IDecl); 1898 1899 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 1900 1901 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1902 1903 enum MethodMatchStrategy { 1904 MMS_loose, 1905 MMS_strict 1906 }; 1907 1908 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1909 /// true, or false, accordingly. 1910 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1911 const ObjCMethodDecl *PrevMethod, 1912 MethodMatchStrategy strategy = MMS_strict); 1913 1914 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1915 /// or protocol against those declared in their implementations. 1916 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1917 const SelectorSet &ClsMap, 1918 SelectorSet &InsMapSeen, 1919 SelectorSet &ClsMapSeen, 1920 ObjCImplDecl* IMPDecl, 1921 ObjCContainerDecl* IDecl, 1922 bool &IncompleteImpl, 1923 bool ImmediateClass, 1924 bool WarnExactMatch=false); 1925 1926 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in 1927 /// category matches with those implemented in its primary class and 1928 /// warns each time an exact match is found. 1929 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP); 1930 1931private: 1932 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1933 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1934 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1935 1936 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1937 /// optionally warns if there are multiple signatures. 1938 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1939 bool receiverIdOrClass, 1940 bool warn, bool instance); 1941 1942public: 1943 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1944 /// unit are added to a global pool. This allows us to efficiently associate 1945 /// a selector with a method declaraation for purposes of typechecking 1946 /// messages sent to "id" (where the class of the object is unknown). 1947 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1948 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1949 } 1950 1951 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1952 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1953 AddMethodToGlobalPool(Method, impl, /*instance*/false); 1954 } 1955 1956 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global 1957 /// pool. 1958 void AddAnyMethodToGlobalPool(Decl *D); 1959 1960 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 1961 /// there are multiple signatures. 1962 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 1963 bool receiverIdOrClass=false, 1964 bool warn=true) { 1965 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1966 warn, /*instance*/true); 1967 } 1968 1969 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 1970 /// there are multiple signatures. 1971 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 1972 bool receiverIdOrClass=false, 1973 bool warn=true) { 1974 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1975 warn, /*instance*/false); 1976 } 1977 1978 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 1979 /// implementation. 1980 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 1981 1982 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 1983 /// initialization. 1984 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 1985 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 1986 1987 //===--------------------------------------------------------------------===// 1988 // Statement Parsing Callbacks: SemaStmt.cpp. 1989public: 1990 class FullExprArg { 1991 public: 1992 FullExprArg(Sema &actions) : E(0) { } 1993 1994 // FIXME: The const_cast here is ugly. RValue references would make this 1995 // much nicer (or we could duplicate a bunch of the move semantics 1996 // emulation code from Ownership.h). 1997 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 1998 1999 ExprResult release() { 2000 return move(E); 2001 } 2002 2003 Expr *get() const { return E; } 2004 2005 Expr *operator->() { 2006 return E; 2007 } 2008 2009 private: 2010 // FIXME: No need to make the entire Sema class a friend when it's just 2011 // Sema::MakeFullExpr that needs access to the constructor below. 2012 friend class Sema; 2013 2014 explicit FullExprArg(Expr *expr) : E(expr) {} 2015 2016 Expr *E; 2017 }; 2018 2019 FullExprArg MakeFullExpr(Expr *Arg) { 2020 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 2021 } 2022 2023 StmtResult ActOnExprStmt(FullExprArg Expr); 2024 2025 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 2026 bool HasLeadingEmptyMacro = false); 2027 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 2028 MultiStmtArg Elts, 2029 bool isStmtExpr); 2030 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2031 SourceLocation StartLoc, 2032 SourceLocation EndLoc); 2033 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2034 StmtResult ActOnForEachLValueExpr(Expr *E); 2035 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2036 SourceLocation DotDotDotLoc, Expr *RHSVal, 2037 SourceLocation ColonLoc); 2038 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2039 2040 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2041 SourceLocation ColonLoc, 2042 Stmt *SubStmt, Scope *CurScope); 2043 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2044 SourceLocation ColonLoc, Stmt *SubStmt); 2045 2046 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2047 FullExprArg CondVal, Decl *CondVar, 2048 Stmt *ThenVal, 2049 SourceLocation ElseLoc, Stmt *ElseVal); 2050 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2051 Expr *Cond, 2052 Decl *CondVar); 2053 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2054 Stmt *Switch, Stmt *Body); 2055 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2056 FullExprArg Cond, 2057 Decl *CondVar, Stmt *Body); 2058 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2059 SourceLocation WhileLoc, 2060 SourceLocation CondLParen, Expr *Cond, 2061 SourceLocation CondRParen); 2062 2063 StmtResult ActOnForStmt(SourceLocation ForLoc, 2064 SourceLocation LParenLoc, 2065 Stmt *First, FullExprArg Second, 2066 Decl *SecondVar, 2067 FullExprArg Third, 2068 SourceLocation RParenLoc, 2069 Stmt *Body); 2070 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc, 2071 Expr *collection); 2072 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2073 SourceLocation LParenLoc, 2074 Stmt *First, Expr *Second, 2075 SourceLocation RParenLoc, Stmt *Body); 2076 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2077 SourceLocation LParenLoc, Stmt *LoopVar, 2078 SourceLocation ColonLoc, Expr *Collection, 2079 SourceLocation RParenLoc); 2080 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2081 SourceLocation ColonLoc, 2082 Stmt *RangeDecl, Stmt *BeginEndDecl, 2083 Expr *Cond, Expr *Inc, 2084 Stmt *LoopVarDecl, 2085 SourceLocation RParenLoc); 2086 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2087 2088 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2089 SourceLocation LabelLoc, 2090 LabelDecl *TheDecl); 2091 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2092 SourceLocation StarLoc, 2093 Expr *DestExp); 2094 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2095 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2096 2097 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2098 bool AllowFunctionParameters); 2099 2100 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2101 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2102 2103 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2104 bool IsSimple, bool IsVolatile, 2105 unsigned NumOutputs, unsigned NumInputs, 2106 IdentifierInfo **Names, 2107 MultiExprArg Constraints, 2108 MultiExprArg Exprs, 2109 Expr *AsmString, 2110 MultiExprArg Clobbers, 2111 SourceLocation RParenLoc, 2112 bool MSAsm = false); 2113 2114 2115 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2116 SourceLocation StartLoc, 2117 SourceLocation IdLoc, IdentifierInfo *Id, 2118 bool Invalid = false); 2119 2120 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2121 2122 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2123 Decl *Parm, Stmt *Body); 2124 2125 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2126 2127 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2128 MultiStmtArg Catch, Stmt *Finally); 2129 2130 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2131 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2132 Scope *CurScope); 2133 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, 2134 Expr *operand); 2135 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2136 Expr *SynchExpr, 2137 Stmt *SynchBody); 2138 2139 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2140 2141 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2142 SourceLocation StartLoc, 2143 SourceLocation IdLoc, 2144 IdentifierInfo *Id); 2145 2146 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2147 2148 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2149 Decl *ExDecl, Stmt *HandlerBlock); 2150 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2151 MultiStmtArg Handlers); 2152 2153 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2154 SourceLocation TryLoc, 2155 Stmt *TryBlock, 2156 Stmt *Handler); 2157 2158 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2159 Expr *FilterExpr, 2160 Stmt *Block); 2161 2162 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2163 Stmt *Block); 2164 2165 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2166 2167 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2168 2169 /// \brief If it's a file scoped decl that must warn if not used, keep track 2170 /// of it. 2171 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2172 2173 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2174 /// whose result is unused, warn. 2175 void DiagnoseUnusedExprResult(const Stmt *S); 2176 void DiagnoseUnusedDecl(const NamedDecl *ND); 2177 2178 ParsingDeclState PushParsingDeclaration() { 2179 return DelayedDiagnostics.pushParsingDecl(); 2180 } 2181 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2182 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2183 } 2184 2185 typedef ProcessingContextState ParsingClassState; 2186 ParsingClassState PushParsingClass() { 2187 return DelayedDiagnostics.pushContext(); 2188 } 2189 void PopParsingClass(ParsingClassState state) { 2190 DelayedDiagnostics.popContext(state); 2191 } 2192 2193 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2194 SourceLocation Loc, 2195 const ObjCInterfaceDecl *UnknownObjCClass=0); 2196 2197 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2198 2199 bool makeUnavailableInSystemHeader(SourceLocation loc, 2200 StringRef message); 2201 2202 //===--------------------------------------------------------------------===// 2203 // Expression Parsing Callbacks: SemaExpr.cpp. 2204 2205 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2206 const ObjCInterfaceDecl *UnknownObjCClass=0); 2207 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2208 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2209 ObjCMethodDecl *Getter, 2210 SourceLocation Loc); 2211 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2212 Expr **Args, unsigned NumArgs); 2213 2214 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 2215 2216 void PopExpressionEvaluationContext(); 2217 2218 void DiscardCleanupsInEvaluationContext(); 2219 2220 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 2221 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2222 void MarkDeclarationsReferencedInExpr(Expr *E); 2223 2224 /// \brief Figure out if an expression could be turned into a call. 2225 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2226 UnresolvedSetImpl &NonTemplateOverloads); 2227 /// \brief Give notes for a set of overloads. 2228 void NoteOverloads(const UnresolvedSetImpl &Overloads, 2229 const SourceLocation FinalNoteLoc); 2230 2231 /// \brief Conditionally issue a diagnostic based on the current 2232 /// evaluation context. 2233 /// 2234 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2235 /// the function body is parsed, and then do a basic reachability analysis to 2236 /// determine if the statement is reachable. If it is unreachable, the 2237 /// diagnostic will not be emitted. 2238 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *stmt, 2239 const PartialDiagnostic &PD); 2240 2241 // Primary Expressions. 2242 SourceRange getExprRange(Expr *E) const; 2243 2244 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Name, 2245 bool HasTrailingLParen, bool IsAddressOfOperand); 2246 2247 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2248 TemplateArgumentListInfo &Buffer, 2249 DeclarationNameInfo &NameInfo, 2250 const TemplateArgumentListInfo *&TemplateArgs); 2251 2252 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2253 CorrectTypoContext CTC = CTC_Unknown, 2254 TemplateArgumentListInfo *ExplicitTemplateArgs = 0, 2255 Expr **Args = 0, unsigned NumArgs = 0); 2256 2257 ExprResult LookupInObjCMethod(LookupResult &R, Scope *S, IdentifierInfo *II, 2258 bool AllowBuiltinCreation=false); 2259 2260 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2261 const DeclarationNameInfo &NameInfo, 2262 bool isAddressOfOperand, 2263 const TemplateArgumentListInfo *TemplateArgs); 2264 2265 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2266 ExprValueKind VK, 2267 SourceLocation Loc, 2268 const CXXScopeSpec *SS = 0); 2269 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2270 ExprValueKind VK, 2271 const DeclarationNameInfo &NameInfo, 2272 const CXXScopeSpec *SS = 0); 2273 ExprResult 2274 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2275 SourceLocation nameLoc, 2276 IndirectFieldDecl *indirectField, 2277 Expr *baseObjectExpr = 0, 2278 SourceLocation opLoc = SourceLocation()); 2279 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2280 LookupResult &R, 2281 const TemplateArgumentListInfo *TemplateArgs); 2282 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2283 LookupResult &R, 2284 const TemplateArgumentListInfo *TemplateArgs, 2285 bool IsDefiniteInstance); 2286 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2287 const LookupResult &R, 2288 bool HasTrailingLParen); 2289 2290 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2291 const DeclarationNameInfo &NameInfo); 2292 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2293 const DeclarationNameInfo &NameInfo, 2294 const TemplateArgumentListInfo *TemplateArgs); 2295 2296 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2297 LookupResult &R, 2298 bool ADL); 2299 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2300 const DeclarationNameInfo &NameInfo, 2301 NamedDecl *D); 2302 2303 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2304 ExprResult ActOnNumericConstant(const Token &); 2305 ExprResult ActOnCharacterConstant(const Token &); 2306 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *Val); 2307 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2308 SourceLocation R, 2309 MultiExprArg Val); 2310 2311 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2312 /// fragments (e.g. "foo" "bar" L"baz"). 2313 ExprResult ActOnStringLiteral(const Token *Toks, unsigned NumToks); 2314 2315 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2316 SourceLocation DefaultLoc, 2317 SourceLocation RParenLoc, 2318 Expr *ControllingExpr, 2319 MultiTypeArg Types, 2320 MultiExprArg Exprs); 2321 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2322 SourceLocation DefaultLoc, 2323 SourceLocation RParenLoc, 2324 Expr *ControllingExpr, 2325 TypeSourceInfo **Types, 2326 Expr **Exprs, 2327 unsigned NumAssocs); 2328 2329 // Binary/Unary Operators. 'Tok' is the token for the operator. 2330 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2331 Expr *InputArg); 2332 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2333 UnaryOperatorKind Opc, Expr *input); 2334 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2335 tok::TokenKind Op, Expr *Input); 2336 2337 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *T, 2338 SourceLocation OpLoc, 2339 UnaryExprOrTypeTrait ExprKind, 2340 SourceRange R); 2341 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2342 UnaryExprOrTypeTrait ExprKind); 2343 ExprResult 2344 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2345 UnaryExprOrTypeTrait ExprKind, 2346 bool isType, void *TyOrEx, 2347 const SourceRange &ArgRange); 2348 2349 ExprResult CheckPlaceholderExpr(Expr *E); 2350 bool CheckVecStepExpr(Expr *E); 2351 2352 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2353 bool CheckUnaryExprOrTypeTraitOperand(QualType type, SourceLocation OpLoc, 2354 SourceRange R, 2355 UnaryExprOrTypeTrait ExprKind); 2356 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2357 SourceLocation OpLoc, 2358 IdentifierInfo &Name, 2359 SourceLocation NameLoc, 2360 SourceLocation RParenLoc); 2361 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2362 tok::TokenKind Kind, Expr *Input); 2363 2364 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2365 Expr *Idx, SourceLocation RLoc); 2366 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2367 Expr *Idx, SourceLocation RLoc); 2368 2369 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2370 SourceLocation OpLoc, bool IsArrow, 2371 CXXScopeSpec &SS, 2372 NamedDecl *FirstQualifierInScope, 2373 const DeclarationNameInfo &NameInfo, 2374 const TemplateArgumentListInfo *TemplateArgs); 2375 2376 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2377 SourceLocation OpLoc, bool IsArrow, 2378 const CXXScopeSpec &SS, 2379 NamedDecl *FirstQualifierInScope, 2380 LookupResult &R, 2381 const TemplateArgumentListInfo *TemplateArgs, 2382 bool SuppressQualifierCheck = false); 2383 2384 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2385 bool &IsArrow, SourceLocation OpLoc, 2386 CXXScopeSpec &SS, 2387 Decl *ObjCImpDecl, 2388 bool HasTemplateArgs); 2389 2390 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2391 const CXXScopeSpec &SS, 2392 const LookupResult &R); 2393 2394 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2395 bool IsArrow, SourceLocation OpLoc, 2396 const CXXScopeSpec &SS, 2397 NamedDecl *FirstQualifierInScope, 2398 const DeclarationNameInfo &NameInfo, 2399 const TemplateArgumentListInfo *TemplateArgs); 2400 2401 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2402 SourceLocation OpLoc, 2403 tok::TokenKind OpKind, 2404 CXXScopeSpec &SS, 2405 UnqualifiedId &Member, 2406 Decl *ObjCImpDecl, 2407 bool HasTrailingLParen); 2408 2409 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2410 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2411 FunctionDecl *FDecl, 2412 const FunctionProtoType *Proto, 2413 Expr **Args, unsigned NumArgs, 2414 SourceLocation RParenLoc); 2415 2416 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2417 /// This provides the location of the left/right parens and a list of comma 2418 /// locations. 2419 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2420 MultiExprArg Args, SourceLocation RParenLoc, 2421 Expr *ExecConfig = 0); 2422 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2423 SourceLocation LParenLoc, 2424 Expr **Args, unsigned NumArgs, 2425 SourceLocation RParenLoc, 2426 Expr *ExecConfig = 0); 2427 2428 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2429 MultiExprArg ExecConfig, SourceLocation GGGLoc); 2430 2431 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2432 Declarator &D, ParsedType &Ty, 2433 SourceLocation RParenLoc, Expr *Op); 2434 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2435 TypeSourceInfo *Ty, 2436 SourceLocation RParenLoc, 2437 Expr *Op); 2438 2439 /// \brief Build an altivec or OpenCL literal. 2440 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2441 SourceLocation RParenLoc, Expr *E, 2442 TypeSourceInfo *TInfo); 2443 2444 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2445 2446 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2447 ParsedType Ty, 2448 SourceLocation RParenLoc, 2449 Expr *Op); 2450 2451 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2452 TypeSourceInfo *TInfo, 2453 SourceLocation RParenLoc, 2454 Expr *InitExpr); 2455 2456 ExprResult ActOnInitList(SourceLocation LParenLoc, 2457 MultiExprArg InitList, 2458 SourceLocation RParenLoc); 2459 2460 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2461 SourceLocation Loc, 2462 bool GNUSyntax, 2463 ExprResult Init); 2464 2465 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2466 tok::TokenKind Kind, Expr *LHS, Expr *RHS); 2467 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2468 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2469 ExprResult CreateBuiltinBinOp(SourceLocation TokLoc, 2470 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2471 2472 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2473 /// in the case of a the GNU conditional expr extension. 2474 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2475 SourceLocation ColonLoc, 2476 Expr *Cond, Expr *LHS, Expr *RHS); 2477 2478 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2479 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2480 LabelDecl *LD); 2481 2482 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2483 SourceLocation RPLoc); // "({..})" 2484 2485 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2486 struct OffsetOfComponent { 2487 SourceLocation LocStart, LocEnd; 2488 bool isBrackets; // true if [expr], false if .ident 2489 union { 2490 IdentifierInfo *IdentInfo; 2491 ExprTy *E; 2492 } U; 2493 }; 2494 2495 /// __builtin_offsetof(type, a.b[123][456].c) 2496 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2497 TypeSourceInfo *TInfo, 2498 OffsetOfComponent *CompPtr, 2499 unsigned NumComponents, 2500 SourceLocation RParenLoc); 2501 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2502 SourceLocation BuiltinLoc, 2503 SourceLocation TypeLoc, 2504 ParsedType Arg1, 2505 OffsetOfComponent *CompPtr, 2506 unsigned NumComponents, 2507 SourceLocation RParenLoc); 2508 2509 // __builtin_choose_expr(constExpr, expr1, expr2) 2510 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2511 Expr *cond, Expr *expr1, 2512 Expr *expr2, SourceLocation RPLoc); 2513 2514 // __builtin_va_arg(expr, type) 2515 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, 2516 Expr *expr, ParsedType type, 2517 SourceLocation RPLoc); 2518 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, 2519 Expr *expr, TypeSourceInfo *TInfo, 2520 SourceLocation RPLoc); 2521 2522 // __null 2523 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2524 2525 bool CheckCaseExpression(Expr *expr); 2526 2527 bool CheckMicrosoftIfExistsSymbol(CXXScopeSpec &SS, UnqualifiedId &Name); 2528 2529 //===------------------------- "Block" Extension ------------------------===// 2530 2531 /// ActOnBlockStart - This callback is invoked when a block literal is 2532 /// started. 2533 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2534 2535 /// ActOnBlockArguments - This callback allows processing of block arguments. 2536 /// If there are no arguments, this is still invoked. 2537 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2538 2539 /// ActOnBlockError - If there is an error parsing a block, this callback 2540 /// is invoked to pop the information about the block from the action impl. 2541 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2542 2543 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2544 /// literal was successfully completed. ^(int x){...} 2545 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, 2546 Stmt *Body, Scope *CurScope); 2547 2548 //===---------------------------- OpenCL Features -----------------------===// 2549 2550 /// __builtin_astype(...) 2551 ExprResult ActOnAsTypeExpr(Expr *expr, ParsedType DestTy, 2552 SourceLocation BuiltinLoc, 2553 SourceLocation RParenLoc); 2554 2555 //===---------------------------- C++ Features --------------------------===// 2556 2557 // Act on C++ namespaces 2558 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2559 SourceLocation NamespaceLoc, 2560 SourceLocation IdentLoc, 2561 IdentifierInfo *Ident, 2562 SourceLocation LBrace, 2563 AttributeList *AttrList); 2564 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2565 2566 NamespaceDecl *getStdNamespace() const; 2567 NamespaceDecl *getOrCreateStdNamespace(); 2568 2569 CXXRecordDecl *getStdBadAlloc() const; 2570 2571 Decl *ActOnUsingDirective(Scope *CurScope, 2572 SourceLocation UsingLoc, 2573 SourceLocation NamespcLoc, 2574 CXXScopeSpec &SS, 2575 SourceLocation IdentLoc, 2576 IdentifierInfo *NamespcName, 2577 AttributeList *AttrList); 2578 2579 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2580 2581 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2582 SourceLocation NamespaceLoc, 2583 SourceLocation AliasLoc, 2584 IdentifierInfo *Alias, 2585 CXXScopeSpec &SS, 2586 SourceLocation IdentLoc, 2587 IdentifierInfo *Ident); 2588 2589 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2590 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2591 const LookupResult &PreviousDecls); 2592 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2593 NamedDecl *Target); 2594 2595 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2596 bool isTypeName, 2597 const CXXScopeSpec &SS, 2598 SourceLocation NameLoc, 2599 const LookupResult &Previous); 2600 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2601 const CXXScopeSpec &SS, 2602 SourceLocation NameLoc); 2603 2604 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2605 SourceLocation UsingLoc, 2606 CXXScopeSpec &SS, 2607 const DeclarationNameInfo &NameInfo, 2608 AttributeList *AttrList, 2609 bool IsInstantiation, 2610 bool IsTypeName, 2611 SourceLocation TypenameLoc); 2612 2613 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2614 2615 Decl *ActOnUsingDeclaration(Scope *CurScope, 2616 AccessSpecifier AS, 2617 bool HasUsingKeyword, 2618 SourceLocation UsingLoc, 2619 CXXScopeSpec &SS, 2620 UnqualifiedId &Name, 2621 AttributeList *AttrList, 2622 bool IsTypeName, 2623 SourceLocation TypenameLoc); 2624 Decl *ActOnAliasDeclaration(Scope *CurScope, 2625 AccessSpecifier AS, 2626 MultiTemplateParamsArg TemplateParams, 2627 SourceLocation UsingLoc, 2628 UnqualifiedId &Name, 2629 TypeResult Type); 2630 2631 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2632 /// ActOnDeclarator, when a C++ direct initializer is present. 2633 /// e.g: "int x(1);" 2634 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2635 SourceLocation LParenLoc, 2636 MultiExprArg Exprs, 2637 SourceLocation RParenLoc, 2638 bool TypeMayContainAuto); 2639 2640 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2641 /// and sets it as the initializer for the the passed in VarDecl. 2642 bool InitializeVarWithConstructor(VarDecl *VD, 2643 CXXConstructorDecl *Constructor, 2644 MultiExprArg Exprs); 2645 2646 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2647 /// including handling of its default argument expressions. 2648 /// 2649 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2650 ExprResult 2651 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2652 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2653 bool RequiresZeroInit, unsigned ConstructKind, 2654 SourceRange ParenRange); 2655 2656 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2657 // the constructor can be elidable? 2658 ExprResult 2659 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2660 CXXConstructorDecl *Constructor, bool Elidable, 2661 MultiExprArg Exprs, bool RequiresZeroInit, 2662 unsigned ConstructKind, 2663 SourceRange ParenRange); 2664 2665 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2666 /// the default expr if needed. 2667 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2668 FunctionDecl *FD, 2669 ParmVarDecl *Param); 2670 2671 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2672 /// constructed variable. 2673 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2674 2675 /// \brief Helper class that collects exception specifications for 2676 /// implicitly-declared special member functions. 2677 class ImplicitExceptionSpecification { 2678 // Pointer to allow copying 2679 ASTContext *Context; 2680 // We order exception specifications thus: 2681 // noexcept is the most restrictive, but is only used in C++0x. 2682 // throw() comes next. 2683 // Then a throw(collected exceptions) 2684 // Finally no specification. 2685 // throw(...) is used instead if any called function uses it. 2686 // 2687 // If this exception specification cannot be known yet (for instance, 2688 // because this is the exception specification for a defaulted default 2689 // constructor and we haven't finished parsing the deferred parts of the 2690 // class yet), the C++0x standard does not specify how to behave. We 2691 // record this as an 'unknown' exception specification, which overrules 2692 // any other specification (even 'none', to keep this rule simple). 2693 ExceptionSpecificationType ComputedEST; 2694 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2695 SmallVector<QualType, 4> Exceptions; 2696 2697 void ClearExceptions() { 2698 ExceptionsSeen.clear(); 2699 Exceptions.clear(); 2700 } 2701 2702 public: 2703 explicit ImplicitExceptionSpecification(ASTContext &Context) 2704 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2705 if (!Context.getLangOptions().CPlusPlus0x) 2706 ComputedEST = EST_DynamicNone; 2707 } 2708 2709 /// \brief Get the computed exception specification type. 2710 ExceptionSpecificationType getExceptionSpecType() const { 2711 assert(ComputedEST != EST_ComputedNoexcept && 2712 "noexcept(expr) should not be a possible result"); 2713 return ComputedEST; 2714 } 2715 2716 /// \brief The number of exceptions in the exception specification. 2717 unsigned size() const { return Exceptions.size(); } 2718 2719 /// \brief The set of exceptions in the exception specification. 2720 const QualType *data() const { return Exceptions.data(); } 2721 2722 /// \brief Integrate another called method into the collected data. 2723 void CalledDecl(CXXMethodDecl *Method); 2724 2725 /// \brief Integrate an invoked expression into the collected data. 2726 void CalledExpr(Expr *E); 2727 2728 /// \brief Specify that the exception specification can't be detemined yet. 2729 void SetDelayed() { 2730 ClearExceptions(); 2731 ComputedEST = EST_Delayed; 2732 } 2733 2734 FunctionProtoType::ExtProtoInfo getEPI() const { 2735 FunctionProtoType::ExtProtoInfo EPI; 2736 EPI.ExceptionSpecType = getExceptionSpecType(); 2737 EPI.NumExceptions = size(); 2738 EPI.Exceptions = data(); 2739 return EPI; 2740 } 2741 }; 2742 2743 /// \brief Determine what sort of exception specification a defaulted 2744 /// copy constructor of a class will have. 2745 ImplicitExceptionSpecification 2746 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2747 2748 /// \brief Determine what sort of exception specification a defaulted 2749 /// default constructor of a class will have, and whether the parameter 2750 /// will be const. 2751 std::pair<ImplicitExceptionSpecification, bool> 2752 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2753 2754 /// \brief Determine what sort of exception specification a defautled 2755 /// copy assignment operator of a class will have, and whether the 2756 /// parameter will be const. 2757 std::pair<ImplicitExceptionSpecification, bool> 2758 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2759 2760 /// \brief Determine what sort of exception specification a defaulted move 2761 /// constructor of a class will have. 2762 ImplicitExceptionSpecification 2763 ComputeDefaultedMoveCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2764 2765 /// \brief Determine what sort of exception specification a defaulted move 2766 /// assignment operator of a class will have. 2767 ImplicitExceptionSpecification 2768 ComputeDefaultedMoveAssignmentExceptionSpec(CXXRecordDecl *ClassDecl); 2769 2770 /// \brief Determine what sort of exception specification a defaulted 2771 /// destructor of a class will have. 2772 ImplicitExceptionSpecification 2773 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 2774 2775 /// \brief Determine if a defaulted default constructor ought to be 2776 /// deleted. 2777 bool ShouldDeleteDefaultConstructor(CXXConstructorDecl *CD); 2778 2779 /// \brief Determine if a defaulted copy constructor ought to be 2780 /// deleted. 2781 bool ShouldDeleteCopyConstructor(CXXConstructorDecl *CD); 2782 2783 /// \brief Determine if a defaulted copy assignment operator ought to be 2784 /// deleted. 2785 bool ShouldDeleteCopyAssignmentOperator(CXXMethodDecl *MD); 2786 2787 /// \brief Determine if a defaulted move constructor ought to be deleted. 2788 bool ShouldDeleteMoveConstructor(CXXConstructorDecl *CD); 2789 2790 /// \brief Determine if a defaulted move assignment operator ought to be 2791 /// deleted. 2792 bool ShouldDeleteMoveAssignmentOperator(CXXMethodDecl *MD); 2793 2794 /// \brief Determine if a defaulted destructor ought to be deleted. 2795 bool ShouldDeleteDestructor(CXXDestructorDecl *DD); 2796 2797 /// \brief Declare the implicit default constructor for the given class. 2798 /// 2799 /// \param ClassDecl The class declaration into which the implicit 2800 /// default constructor will be added. 2801 /// 2802 /// \returns The implicitly-declared default constructor. 2803 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2804 CXXRecordDecl *ClassDecl); 2805 2806 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2807 /// defining this constructor as the default constructor. 2808 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2809 CXXConstructorDecl *Constructor); 2810 2811 /// \brief Declare the implicit destructor for the given class. 2812 /// 2813 /// \param ClassDecl The class declaration into which the implicit 2814 /// destructor will be added. 2815 /// 2816 /// \returns The implicitly-declared destructor. 2817 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2818 2819 /// DefineImplicitDestructor - Checks for feasibility of 2820 /// defining this destructor as the default destructor. 2821 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2822 CXXDestructorDecl *Destructor); 2823 2824 /// \brief Build an exception spec for destructors that don't have one. 2825 /// 2826 /// C++11 says that user-defined destructors with no exception spec get one 2827 /// that looks as if the destructor was implicitly declared. 2828 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 2829 CXXDestructorDecl *Destructor); 2830 2831 /// \brief Declare all inherited constructors for the given class. 2832 /// 2833 /// \param ClassDecl The class declaration into which the inherited 2834 /// constructors will be added. 2835 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2836 2837 /// \brief Declare the implicit copy constructor for the given class. 2838 /// 2839 /// \param ClassDecl The class declaration into which the implicit 2840 /// copy constructor will be added. 2841 /// 2842 /// \returns The implicitly-declared copy constructor. 2843 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2844 2845 /// DefineImplicitCopyConstructor - Checks for feasibility of 2846 /// defining this constructor as the copy constructor. 2847 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2848 CXXConstructorDecl *Constructor); 2849 2850 /// \brief Declare the implicit move constructor for the given class. 2851 /// 2852 /// \param ClassDecl The Class declaration into which the implicit 2853 /// move constructor will be added. 2854 /// 2855 /// \returns The implicitly-declared move constructor, or NULL if it wasn't 2856 /// declared. 2857 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl); 2858 2859 /// DefineImplicitMoveConstructor - Checks for feasibility of 2860 /// defining this constructor as the move constructor. 2861 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation, 2862 CXXConstructorDecl *Constructor); 2863 2864 /// \brief Declare the implicit copy assignment operator for the given class. 2865 /// 2866 /// \param ClassDecl The class declaration into which the implicit 2867 /// copy assignment operator will be added. 2868 /// 2869 /// \returns The implicitly-declared copy assignment operator. 2870 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2871 2872 /// \brief Defines an implicitly-declared copy assignment operator. 2873 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2874 CXXMethodDecl *MethodDecl); 2875 2876 /// \brief Declare the implicit move assignment operator for the given class. 2877 /// 2878 /// \param ClassDecl The Class declaration into which the implicit 2879 /// move assignment operator will be added. 2880 /// 2881 /// \returns The implicitly-declared move assignment operator, or NULL if it 2882 /// wasn't declared. 2883 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl); 2884 2885 /// \brief Defines an implicitly-declared move assignment operator. 2886 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation, 2887 CXXMethodDecl *MethodDecl); 2888 2889 /// \brief Force the declaration of any implicitly-declared members of this 2890 /// class. 2891 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2892 2893 /// MaybeBindToTemporary - If the passed in expression has a record type with 2894 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 2895 /// it simply returns the passed in expression. 2896 ExprResult MaybeBindToTemporary(Expr *E); 2897 2898 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 2899 MultiExprArg ArgsPtr, 2900 SourceLocation Loc, 2901 ASTOwningVector<Expr*> &ConvertedArgs); 2902 2903 ParsedType getDestructorName(SourceLocation TildeLoc, 2904 IdentifierInfo &II, SourceLocation NameLoc, 2905 Scope *S, CXXScopeSpec &SS, 2906 ParsedType ObjectType, 2907 bool EnteringContext); 2908 2909 // Checks that reinterpret casts don't have undefined behavior. 2910 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 2911 bool IsDereference, SourceRange Range); 2912 2913 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 2914 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 2915 tok::TokenKind Kind, 2916 SourceLocation LAngleBracketLoc, 2917 Declarator &D, 2918 SourceLocation RAngleBracketLoc, 2919 SourceLocation LParenLoc, 2920 Expr *E, 2921 SourceLocation RParenLoc); 2922 2923 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 2924 tok::TokenKind Kind, 2925 TypeSourceInfo *Ty, 2926 Expr *E, 2927 SourceRange AngleBrackets, 2928 SourceRange Parens); 2929 2930 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2931 SourceLocation TypeidLoc, 2932 TypeSourceInfo *Operand, 2933 SourceLocation RParenLoc); 2934 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2935 SourceLocation TypeidLoc, 2936 Expr *Operand, 2937 SourceLocation RParenLoc); 2938 2939 /// ActOnCXXTypeid - Parse typeid( something ). 2940 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 2941 SourceLocation LParenLoc, bool isType, 2942 void *TyOrExpr, 2943 SourceLocation RParenLoc); 2944 2945 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2946 SourceLocation TypeidLoc, 2947 TypeSourceInfo *Operand, 2948 SourceLocation RParenLoc); 2949 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2950 SourceLocation TypeidLoc, 2951 Expr *Operand, 2952 SourceLocation RParenLoc); 2953 2954 /// ActOnCXXUuidof - Parse __uuidof( something ). 2955 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 2956 SourceLocation LParenLoc, bool isType, 2957 void *TyOrExpr, 2958 SourceLocation RParenLoc); 2959 2960 2961 //// ActOnCXXThis - Parse 'this' pointer. 2962 ExprResult ActOnCXXThis(SourceLocation loc); 2963 2964 /// getAndCaptureCurrentThisType - Try to capture a 'this' pointer. Returns 2965 /// the type of the 'this' pointer, or a null type if this is not possible. 2966 QualType getAndCaptureCurrentThisType(); 2967 2968 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 2969 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 2970 2971 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 2972 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 2973 2974 //// ActOnCXXThrow - Parse throw expressions. 2975 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 2976 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 2977 bool IsThrownVarInScope); 2978 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 2979 bool IsThrownVarInScope); 2980 2981 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 2982 /// Can be interpreted either as function-style casting ("int(x)") 2983 /// or class type construction ("ClassType(x,y,z)") 2984 /// or creation of a value-initialized type ("int()"). 2985 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 2986 SourceLocation LParenLoc, 2987 MultiExprArg Exprs, 2988 SourceLocation RParenLoc); 2989 2990 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 2991 SourceLocation LParenLoc, 2992 MultiExprArg Exprs, 2993 SourceLocation RParenLoc); 2994 2995 /// ActOnCXXNew - Parsed a C++ 'new' expression. 2996 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 2997 SourceLocation PlacementLParen, 2998 MultiExprArg PlacementArgs, 2999 SourceLocation PlacementRParen, 3000 SourceRange TypeIdParens, Declarator &D, 3001 SourceLocation ConstructorLParen, 3002 MultiExprArg ConstructorArgs, 3003 SourceLocation ConstructorRParen); 3004 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 3005 SourceLocation PlacementLParen, 3006 MultiExprArg PlacementArgs, 3007 SourceLocation PlacementRParen, 3008 SourceRange TypeIdParens, 3009 QualType AllocType, 3010 TypeSourceInfo *AllocTypeInfo, 3011 Expr *ArraySize, 3012 SourceLocation ConstructorLParen, 3013 MultiExprArg ConstructorArgs, 3014 SourceLocation ConstructorRParen, 3015 bool TypeMayContainAuto = true); 3016 3017 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 3018 SourceRange R); 3019 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 3020 bool UseGlobal, QualType AllocType, bool IsArray, 3021 Expr **PlaceArgs, unsigned NumPlaceArgs, 3022 FunctionDecl *&OperatorNew, 3023 FunctionDecl *&OperatorDelete); 3024 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 3025 DeclarationName Name, Expr** Args, 3026 unsigned NumArgs, DeclContext *Ctx, 3027 bool AllowMissing, FunctionDecl *&Operator, 3028 bool Diagnose = true); 3029 void DeclareGlobalNewDelete(); 3030 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 3031 QualType Argument, 3032 bool addMallocAttr = false); 3033 3034 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 3035 DeclarationName Name, FunctionDecl* &Operator, 3036 bool Diagnose = true); 3037 3038 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 3039 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 3040 bool UseGlobal, bool ArrayForm, 3041 Expr *Operand); 3042 3043 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 3044 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 3045 SourceLocation StmtLoc, 3046 bool ConvertToBoolean); 3047 3048 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 3049 Expr *Operand, SourceLocation RParen); 3050 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 3051 SourceLocation RParen); 3052 3053 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 3054 /// pseudo-functions. 3055 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 3056 SourceLocation KWLoc, 3057 ParsedType Ty, 3058 SourceLocation RParen); 3059 3060 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3061 SourceLocation KWLoc, 3062 TypeSourceInfo *T, 3063 SourceLocation RParen); 3064 3065 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3066 /// pseudo-functions. 3067 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3068 SourceLocation KWLoc, 3069 ParsedType LhsTy, 3070 ParsedType RhsTy, 3071 SourceLocation RParen); 3072 3073 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3074 SourceLocation KWLoc, 3075 TypeSourceInfo *LhsT, 3076 TypeSourceInfo *RhsT, 3077 SourceLocation RParen); 3078 3079 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3080 /// pseudo-functions. 3081 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3082 SourceLocation KWLoc, 3083 ParsedType LhsTy, 3084 Expr *DimExpr, 3085 SourceLocation RParen); 3086 3087 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3088 SourceLocation KWLoc, 3089 TypeSourceInfo *TSInfo, 3090 Expr *DimExpr, 3091 SourceLocation RParen); 3092 3093 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3094 /// pseudo-functions. 3095 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3096 SourceLocation KWLoc, 3097 Expr *Queried, 3098 SourceLocation RParen); 3099 3100 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3101 SourceLocation KWLoc, 3102 Expr *Queried, 3103 SourceLocation RParen); 3104 3105 ExprResult ActOnStartCXXMemberReference(Scope *S, 3106 Expr *Base, 3107 SourceLocation OpLoc, 3108 tok::TokenKind OpKind, 3109 ParsedType &ObjectType, 3110 bool &MayBePseudoDestructor); 3111 3112 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3113 3114 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3115 SourceLocation OpLoc, 3116 tok::TokenKind OpKind, 3117 const CXXScopeSpec &SS, 3118 TypeSourceInfo *ScopeType, 3119 SourceLocation CCLoc, 3120 SourceLocation TildeLoc, 3121 PseudoDestructorTypeStorage DestroyedType, 3122 bool HasTrailingLParen); 3123 3124 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3125 SourceLocation OpLoc, 3126 tok::TokenKind OpKind, 3127 CXXScopeSpec &SS, 3128 UnqualifiedId &FirstTypeName, 3129 SourceLocation CCLoc, 3130 SourceLocation TildeLoc, 3131 UnqualifiedId &SecondTypeName, 3132 bool HasTrailingLParen); 3133 3134 /// MaybeCreateExprWithCleanups - If the current full-expression 3135 /// requires any cleanups, surround it with a ExprWithCleanups node. 3136 /// Otherwise, just returns the passed-in expression. 3137 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3138 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3139 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3140 3141 ExprResult ActOnFinishFullExpr(Expr *Expr); 3142 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3143 3144 // Marks SS invalid if it represents an incomplete type. 3145 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3146 3147 DeclContext *computeDeclContext(QualType T); 3148 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3149 bool EnteringContext = false); 3150 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3151 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3152 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3153 3154 /// \brief The parser has parsed a global nested-name-specifier '::'. 3155 /// 3156 /// \param S The scope in which this nested-name-specifier occurs. 3157 /// 3158 /// \param CCLoc The location of the '::'. 3159 /// 3160 /// \param SS The nested-name-specifier, which will be updated in-place 3161 /// to reflect the parsed nested-name-specifier. 3162 /// 3163 /// \returns true if an error occurred, false otherwise. 3164 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3165 CXXScopeSpec &SS); 3166 3167 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3168 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3169 3170 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3171 SourceLocation IdLoc, 3172 IdentifierInfo &II, 3173 ParsedType ObjectType); 3174 3175 bool BuildCXXNestedNameSpecifier(Scope *S, 3176 IdentifierInfo &Identifier, 3177 SourceLocation IdentifierLoc, 3178 SourceLocation CCLoc, 3179 QualType ObjectType, 3180 bool EnteringContext, 3181 CXXScopeSpec &SS, 3182 NamedDecl *ScopeLookupResult, 3183 bool ErrorRecoveryLookup); 3184 3185 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3186 /// 3187 /// \param S The scope in which this nested-name-specifier occurs. 3188 /// 3189 /// \param Identifier The identifier preceding the '::'. 3190 /// 3191 /// \param IdentifierLoc The location of the identifier. 3192 /// 3193 /// \param CCLoc The location of the '::'. 3194 /// 3195 /// \param ObjectType The type of the object, if we're parsing 3196 /// nested-name-specifier in a member access expression. 3197 /// 3198 /// \param EnteringContext Whether we're entering the context nominated by 3199 /// this nested-name-specifier. 3200 /// 3201 /// \param SS The nested-name-specifier, which is both an input 3202 /// parameter (the nested-name-specifier before this type) and an 3203 /// output parameter (containing the full nested-name-specifier, 3204 /// including this new type). 3205 /// 3206 /// \returns true if an error occurred, false otherwise. 3207 bool ActOnCXXNestedNameSpecifier(Scope *S, 3208 IdentifierInfo &Identifier, 3209 SourceLocation IdentifierLoc, 3210 SourceLocation CCLoc, 3211 ParsedType ObjectType, 3212 bool EnteringContext, 3213 CXXScopeSpec &SS); 3214 3215 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3216 IdentifierInfo &Identifier, 3217 SourceLocation IdentifierLoc, 3218 SourceLocation ColonLoc, 3219 ParsedType ObjectType, 3220 bool EnteringContext); 3221 3222 /// \brief The parser has parsed a nested-name-specifier 3223 /// 'template[opt] template-name < template-args >::'. 3224 /// 3225 /// \param S The scope in which this nested-name-specifier occurs. 3226 /// 3227 /// \param TemplateLoc The location of the 'template' keyword, if any. 3228 /// 3229 /// \param SS The nested-name-specifier, which is both an input 3230 /// parameter (the nested-name-specifier before this type) and an 3231 /// output parameter (containing the full nested-name-specifier, 3232 /// including this new type). 3233 /// 3234 /// \param TemplateLoc the location of the 'template' keyword, if any. 3235 /// \param TemplateName The template name. 3236 /// \param TemplateNameLoc The location of the template name. 3237 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3238 /// \param TemplateArgs The template arguments. 3239 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3240 /// \param CCLoc The location of the '::'. 3241 3242 /// \param EnteringContext Whether we're entering the context of the 3243 /// nested-name-specifier. 3244 /// 3245 /// 3246 /// \returns true if an error occurred, false otherwise. 3247 bool ActOnCXXNestedNameSpecifier(Scope *S, 3248 SourceLocation TemplateLoc, 3249 CXXScopeSpec &SS, 3250 TemplateTy Template, 3251 SourceLocation TemplateNameLoc, 3252 SourceLocation LAngleLoc, 3253 ASTTemplateArgsPtr TemplateArgs, 3254 SourceLocation RAngleLoc, 3255 SourceLocation CCLoc, 3256 bool EnteringContext); 3257 3258 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3259 /// that the parser can use later to reconstruct the given 3260 /// nested-name-specifier. 3261 /// 3262 /// \param SS A nested-name-specifier. 3263 /// 3264 /// \returns A pointer containing all of the information in the 3265 /// nested-name-specifier \p SS. 3266 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3267 3268 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3269 /// the nested-name-specifier structure. 3270 /// 3271 /// \param Annotation The annotation pointer, produced by 3272 /// \c SaveNestedNameSpecifierAnnotation(). 3273 /// 3274 /// \param AnnotationRange The source range corresponding to the annotation. 3275 /// 3276 /// \param SS The nested-name-specifier that will be updated with the contents 3277 /// of the annotation pointer. 3278 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3279 SourceRange AnnotationRange, 3280 CXXScopeSpec &SS); 3281 3282 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3283 3284 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3285 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3286 /// After this method is called, according to [C++ 3.4.3p3], names should be 3287 /// looked up in the declarator-id's scope, until the declarator is parsed and 3288 /// ActOnCXXExitDeclaratorScope is called. 3289 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3290 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3291 3292 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3293 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3294 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3295 /// Used to indicate that names should revert to being looked up in the 3296 /// defining scope. 3297 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3298 3299 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3300 /// initializer for the declaration 'Dcl'. 3301 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3302 /// static data member of class X, names should be looked up in the scope of 3303 /// class X. 3304 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3305 3306 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3307 /// initializer for the declaration 'Dcl'. 3308 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3309 3310 // ParseObjCStringLiteral - Parse Objective-C string literals. 3311 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3312 Expr **Strings, 3313 unsigned NumStrings); 3314 3315 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3316 TypeSourceInfo *EncodedTypeInfo, 3317 SourceLocation RParenLoc); 3318 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3319 CXXMethodDecl *Method); 3320 3321 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3322 SourceLocation EncodeLoc, 3323 SourceLocation LParenLoc, 3324 ParsedType Ty, 3325 SourceLocation RParenLoc); 3326 3327 // ParseObjCSelectorExpression - Build selector expression for @selector 3328 ExprResult ParseObjCSelectorExpression(Selector Sel, 3329 SourceLocation AtLoc, 3330 SourceLocation SelLoc, 3331 SourceLocation LParenLoc, 3332 SourceLocation RParenLoc); 3333 3334 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3335 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3336 SourceLocation AtLoc, 3337 SourceLocation ProtoLoc, 3338 SourceLocation LParenLoc, 3339 SourceLocation RParenLoc); 3340 3341 //===--------------------------------------------------------------------===// 3342 // C++ Declarations 3343 // 3344 Decl *ActOnStartLinkageSpecification(Scope *S, 3345 SourceLocation ExternLoc, 3346 SourceLocation LangLoc, 3347 StringRef Lang, 3348 SourceLocation LBraceLoc); 3349 Decl *ActOnFinishLinkageSpecification(Scope *S, 3350 Decl *LinkageSpec, 3351 SourceLocation RBraceLoc); 3352 3353 3354 //===--------------------------------------------------------------------===// 3355 // C++ Classes 3356 // 3357 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3358 const CXXScopeSpec *SS = 0); 3359 3360 Decl *ActOnAccessSpecifier(AccessSpecifier Access, 3361 SourceLocation ASLoc, 3362 SourceLocation ColonLoc); 3363 3364 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3365 Declarator &D, 3366 MultiTemplateParamsArg TemplateParameterLists, 3367 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3368 Expr *Init, bool HasDeferredInit, 3369 bool IsDefinition); 3370 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3371 Expr *Init); 3372 3373 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3374 Scope *S, 3375 CXXScopeSpec &SS, 3376 IdentifierInfo *MemberOrBase, 3377 ParsedType TemplateTypeTy, 3378 SourceLocation IdLoc, 3379 SourceLocation LParenLoc, 3380 Expr **Args, unsigned NumArgs, 3381 SourceLocation RParenLoc, 3382 SourceLocation EllipsisLoc); 3383 3384 MemInitResult BuildMemberInitializer(ValueDecl *Member, Expr **Args, 3385 unsigned NumArgs, SourceLocation IdLoc, 3386 SourceLocation LParenLoc, 3387 SourceLocation RParenLoc); 3388 3389 MemInitResult BuildBaseInitializer(QualType BaseType, 3390 TypeSourceInfo *BaseTInfo, 3391 Expr **Args, unsigned NumArgs, 3392 SourceLocation LParenLoc, 3393 SourceLocation RParenLoc, 3394 CXXRecordDecl *ClassDecl, 3395 SourceLocation EllipsisLoc); 3396 3397 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3398 Expr **Args, unsigned NumArgs, 3399 SourceLocation BaseLoc, 3400 SourceLocation RParenLoc, 3401 SourceLocation LParenLoc, 3402 CXXRecordDecl *ClassDecl); 3403 3404 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3405 CXXCtorInitializer *Initializer); 3406 3407 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3408 CXXCtorInitializer **Initializers, 3409 unsigned NumInitializers, bool AnyErrors); 3410 3411 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3412 3413 3414 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3415 /// mark all the non-trivial destructors of its members and bases as 3416 /// referenced. 3417 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3418 CXXRecordDecl *Record); 3419 3420 /// \brief The list of classes whose vtables have been used within 3421 /// this translation unit, and the source locations at which the 3422 /// first use occurred. 3423 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3424 3425 /// \brief The list of vtables that are required but have not yet been 3426 /// materialized. 3427 SmallVector<VTableUse, 16> VTableUses; 3428 3429 /// \brief The set of classes whose vtables have been used within 3430 /// this translation unit, and a bit that will be true if the vtable is 3431 /// required to be emitted (otherwise, it should be emitted only if needed 3432 /// by code generation). 3433 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3434 3435 /// \brief Load any externally-stored vtable uses. 3436 void LoadExternalVTableUses(); 3437 3438 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 3439 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 3440 DynamicClassesType; 3441 3442 /// \brief A list of all of the dynamic classes in this translation 3443 /// unit. 3444 DynamicClassesType DynamicClasses; 3445 3446 /// \brief Note that the vtable for the given class was used at the 3447 /// given location. 3448 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3449 bool DefinitionRequired = false); 3450 3451 /// MarkVirtualMembersReferenced - Will mark all members of the given 3452 /// CXXRecordDecl referenced. 3453 void MarkVirtualMembersReferenced(SourceLocation Loc, 3454 const CXXRecordDecl *RD); 3455 3456 /// \brief Define all of the vtables that have been used in this 3457 /// translation unit and reference any virtual members used by those 3458 /// vtables. 3459 /// 3460 /// \returns true if any work was done, false otherwise. 3461 bool DefineUsedVTables(); 3462 3463 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3464 3465 void ActOnMemInitializers(Decl *ConstructorDecl, 3466 SourceLocation ColonLoc, 3467 MemInitTy **MemInits, unsigned NumMemInits, 3468 bool AnyErrors); 3469 3470 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3471 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3472 Decl *TagDecl, 3473 SourceLocation LBrac, 3474 SourceLocation RBrac, 3475 AttributeList *AttrList); 3476 3477 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3478 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3479 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3480 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3481 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3482 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3483 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3484 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3485 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3486 bool IsInsideALocalClassWithinATemplateFunction(); 3487 3488 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3489 Expr *AssertExpr, 3490 Expr *AssertMessageExpr, 3491 SourceLocation RParenLoc); 3492 3493 FriendDecl *CheckFriendTypeDecl(SourceLocation FriendLoc, 3494 TypeSourceInfo *TSInfo); 3495 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3496 MultiTemplateParamsArg TemplateParams); 3497 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, bool IsDefinition, 3498 MultiTemplateParamsArg TemplateParams); 3499 3500 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3501 StorageClass& SC); 3502 void CheckConstructor(CXXConstructorDecl *Constructor); 3503 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3504 StorageClass& SC); 3505 bool CheckDestructor(CXXDestructorDecl *Destructor); 3506 void CheckConversionDeclarator(Declarator &D, QualType &R, 3507 StorageClass& SC); 3508 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3509 3510 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3511 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3512 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3513 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3514 void CheckExplicitlyDefaultedMoveConstructor(CXXConstructorDecl *Ctor); 3515 void CheckExplicitlyDefaultedMoveAssignment(CXXMethodDecl *Method); 3516 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3517 3518 //===--------------------------------------------------------------------===// 3519 // C++ Derived Classes 3520 // 3521 3522 /// ActOnBaseSpecifier - Parsed a base specifier 3523 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3524 SourceRange SpecifierRange, 3525 bool Virtual, AccessSpecifier Access, 3526 TypeSourceInfo *TInfo, 3527 SourceLocation EllipsisLoc); 3528 3529 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3530 SourceRange SpecifierRange, 3531 bool Virtual, AccessSpecifier Access, 3532 ParsedType basetype, 3533 SourceLocation BaseLoc, 3534 SourceLocation EllipsisLoc); 3535 3536 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3537 unsigned NumBases); 3538 void ActOnBaseSpecifiers(Decl *ClassDecl, BaseTy **Bases, unsigned NumBases); 3539 3540 bool IsDerivedFrom(QualType Derived, QualType Base); 3541 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3542 3543 // FIXME: I don't like this name. 3544 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3545 3546 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3547 3548 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3549 SourceLocation Loc, SourceRange Range, 3550 CXXCastPath *BasePath = 0, 3551 bool IgnoreAccess = false); 3552 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3553 unsigned InaccessibleBaseID, 3554 unsigned AmbigiousBaseConvID, 3555 SourceLocation Loc, SourceRange Range, 3556 DeclarationName Name, 3557 CXXCastPath *BasePath); 3558 3559 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3560 3561 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3562 /// covariant, according to C++ [class.virtual]p5. 3563 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3564 const CXXMethodDecl *Old); 3565 3566 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3567 /// spec is a subset of base spec. 3568 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3569 const CXXMethodDecl *Old); 3570 3571 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3572 3573 /// CheckOverrideControl - Check C++0x override control semantics. 3574 void CheckOverrideControl(const Decl *D); 3575 3576 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3577 /// overrides a virtual member function marked 'final', according to 3578 /// C++0x [class.virtual]p3. 3579 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3580 const CXXMethodDecl *Old); 3581 3582 3583 //===--------------------------------------------------------------------===// 3584 // C++ Access Control 3585 // 3586 3587 enum AccessResult { 3588 AR_accessible, 3589 AR_inaccessible, 3590 AR_dependent, 3591 AR_delayed 3592 }; 3593 3594 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3595 NamedDecl *PrevMemberDecl, 3596 AccessSpecifier LexicalAS); 3597 3598 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3599 DeclAccessPair FoundDecl); 3600 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3601 DeclAccessPair FoundDecl); 3602 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3603 SourceRange PlacementRange, 3604 CXXRecordDecl *NamingClass, 3605 DeclAccessPair FoundDecl, 3606 bool Diagnose = true); 3607 AccessResult CheckConstructorAccess(SourceLocation Loc, 3608 CXXConstructorDecl *D, 3609 const InitializedEntity &Entity, 3610 AccessSpecifier Access, 3611 bool IsCopyBindingRefToTemp = false); 3612 AccessResult CheckConstructorAccess(SourceLocation Loc, 3613 CXXConstructorDecl *D, 3614 AccessSpecifier Access, 3615 PartialDiagnostic PD); 3616 AccessResult CheckDestructorAccess(SourceLocation Loc, 3617 CXXDestructorDecl *Dtor, 3618 const PartialDiagnostic &PDiag); 3619 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3620 NamedDecl *D, 3621 const PartialDiagnostic &PDiag); 3622 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3623 Expr *ObjectExpr, 3624 Expr *ArgExpr, 3625 DeclAccessPair FoundDecl); 3626 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3627 DeclAccessPair FoundDecl); 3628 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3629 QualType Base, QualType Derived, 3630 const CXXBasePath &Path, 3631 unsigned DiagID, 3632 bool ForceCheck = false, 3633 bool ForceUnprivileged = false); 3634 void CheckLookupAccess(const LookupResult &R); 3635 3636 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3637 const MultiLevelTemplateArgumentList &TemplateArgs); 3638 void PerformDependentDiagnostics(const DeclContext *Pattern, 3639 const MultiLevelTemplateArgumentList &TemplateArgs); 3640 3641 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3642 3643 /// A flag to suppress access checking. 3644 bool SuppressAccessChecking; 3645 3646 /// \brief When true, access checking violations are treated as SFINAE 3647 /// failures rather than hard errors. 3648 bool AccessCheckingSFINAE; 3649 3650 void ActOnStartSuppressingAccessChecks(); 3651 void ActOnStopSuppressingAccessChecks(); 3652 3653 enum AbstractDiagSelID { 3654 AbstractNone = -1, 3655 AbstractReturnType, 3656 AbstractParamType, 3657 AbstractVariableType, 3658 AbstractFieldType, 3659 AbstractArrayType 3660 }; 3661 3662 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3663 const PartialDiagnostic &PD); 3664 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3665 3666 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3667 AbstractDiagSelID SelID = AbstractNone); 3668 3669 //===--------------------------------------------------------------------===// 3670 // C++ Overloaded Operators [C++ 13.5] 3671 // 3672 3673 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3674 3675 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3676 3677 //===--------------------------------------------------------------------===// 3678 // C++ Templates [C++ 14] 3679 // 3680 void FilterAcceptableTemplateNames(LookupResult &R); 3681 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3682 3683 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3684 QualType ObjectType, bool EnteringContext, 3685 bool &MemberOfUnknownSpecialization); 3686 3687 TemplateNameKind isTemplateName(Scope *S, 3688 CXXScopeSpec &SS, 3689 bool hasTemplateKeyword, 3690 UnqualifiedId &Name, 3691 ParsedType ObjectType, 3692 bool EnteringContext, 3693 TemplateTy &Template, 3694 bool &MemberOfUnknownSpecialization); 3695 3696 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3697 SourceLocation IILoc, 3698 Scope *S, 3699 const CXXScopeSpec *SS, 3700 TemplateTy &SuggestedTemplate, 3701 TemplateNameKind &SuggestedKind); 3702 3703 bool DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3704 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3705 3706 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3707 SourceLocation EllipsisLoc, 3708 SourceLocation KeyLoc, 3709 IdentifierInfo *ParamName, 3710 SourceLocation ParamNameLoc, 3711 unsigned Depth, unsigned Position, 3712 SourceLocation EqualLoc, 3713 ParsedType DefaultArg); 3714 3715 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3716 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3717 unsigned Depth, 3718 unsigned Position, 3719 SourceLocation EqualLoc, 3720 Expr *DefaultArg); 3721 Decl *ActOnTemplateTemplateParameter(Scope *S, 3722 SourceLocation TmpLoc, 3723 TemplateParamsTy *Params, 3724 SourceLocation EllipsisLoc, 3725 IdentifierInfo *ParamName, 3726 SourceLocation ParamNameLoc, 3727 unsigned Depth, 3728 unsigned Position, 3729 SourceLocation EqualLoc, 3730 ParsedTemplateArgument DefaultArg); 3731 3732 TemplateParamsTy * 3733 ActOnTemplateParameterList(unsigned Depth, 3734 SourceLocation ExportLoc, 3735 SourceLocation TemplateLoc, 3736 SourceLocation LAngleLoc, 3737 Decl **Params, unsigned NumParams, 3738 SourceLocation RAngleLoc); 3739 3740 /// \brief The context in which we are checking a template parameter 3741 /// list. 3742 enum TemplateParamListContext { 3743 TPC_ClassTemplate, 3744 TPC_FunctionTemplate, 3745 TPC_ClassTemplateMember, 3746 TPC_FriendFunctionTemplate, 3747 TPC_FriendFunctionTemplateDefinition, 3748 TPC_TypeAliasTemplate 3749 }; 3750 3751 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3752 TemplateParameterList *OldParams, 3753 TemplateParamListContext TPC); 3754 TemplateParameterList * 3755 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3756 SourceLocation DeclLoc, 3757 const CXXScopeSpec &SS, 3758 TemplateParameterList **ParamLists, 3759 unsigned NumParamLists, 3760 bool IsFriend, 3761 bool &IsExplicitSpecialization, 3762 bool &Invalid); 3763 3764 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3765 SourceLocation KWLoc, CXXScopeSpec &SS, 3766 IdentifierInfo *Name, SourceLocation NameLoc, 3767 AttributeList *Attr, 3768 TemplateParameterList *TemplateParams, 3769 AccessSpecifier AS, 3770 unsigned NumOuterTemplateParamLists, 3771 TemplateParameterList **OuterTemplateParamLists); 3772 3773 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3774 TemplateArgumentListInfo &Out); 3775 3776 void NoteAllFoundTemplates(TemplateName Name); 3777 3778 QualType CheckTemplateIdType(TemplateName Template, 3779 SourceLocation TemplateLoc, 3780 TemplateArgumentListInfo &TemplateArgs); 3781 3782 TypeResult 3783 ActOnTemplateIdType(CXXScopeSpec &SS, 3784 TemplateTy Template, SourceLocation TemplateLoc, 3785 SourceLocation LAngleLoc, 3786 ASTTemplateArgsPtr TemplateArgs, 3787 SourceLocation RAngleLoc); 3788 3789 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3790 /// such as \c class T::template apply<U>. 3791 /// 3792 /// \param TUK 3793 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3794 TypeSpecifierType TagSpec, 3795 SourceLocation TagLoc, 3796 CXXScopeSpec &SS, 3797 TemplateTy TemplateD, 3798 SourceLocation TemplateLoc, 3799 SourceLocation LAngleLoc, 3800 ASTTemplateArgsPtr TemplateArgsIn, 3801 SourceLocation RAngleLoc); 3802 3803 3804 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3805 LookupResult &R, 3806 bool RequiresADL, 3807 const TemplateArgumentListInfo &TemplateArgs); 3808 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3809 const DeclarationNameInfo &NameInfo, 3810 const TemplateArgumentListInfo &TemplateArgs); 3811 3812 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3813 SourceLocation TemplateKWLoc, 3814 CXXScopeSpec &SS, 3815 UnqualifiedId &Name, 3816 ParsedType ObjectType, 3817 bool EnteringContext, 3818 TemplateTy &Template); 3819 3820 DeclResult 3821 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3822 SourceLocation KWLoc, 3823 CXXScopeSpec &SS, 3824 TemplateTy Template, 3825 SourceLocation TemplateNameLoc, 3826 SourceLocation LAngleLoc, 3827 ASTTemplateArgsPtr TemplateArgs, 3828 SourceLocation RAngleLoc, 3829 AttributeList *Attr, 3830 MultiTemplateParamsArg TemplateParameterLists); 3831 3832 Decl *ActOnTemplateDeclarator(Scope *S, 3833 MultiTemplateParamsArg TemplateParameterLists, 3834 Declarator &D); 3835 3836 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3837 MultiTemplateParamsArg TemplateParameterLists, 3838 Declarator &D); 3839 3840 bool 3841 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3842 TemplateSpecializationKind NewTSK, 3843 NamedDecl *PrevDecl, 3844 TemplateSpecializationKind PrevTSK, 3845 SourceLocation PrevPtOfInstantiation, 3846 bool &SuppressNew); 3847 3848 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3849 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3850 LookupResult &Previous); 3851 3852 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 3853 TemplateArgumentListInfo *ExplicitTemplateArgs, 3854 LookupResult &Previous); 3855 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 3856 3857 DeclResult 3858 ActOnExplicitInstantiation(Scope *S, 3859 SourceLocation ExternLoc, 3860 SourceLocation TemplateLoc, 3861 unsigned TagSpec, 3862 SourceLocation KWLoc, 3863 const CXXScopeSpec &SS, 3864 TemplateTy Template, 3865 SourceLocation TemplateNameLoc, 3866 SourceLocation LAngleLoc, 3867 ASTTemplateArgsPtr TemplateArgs, 3868 SourceLocation RAngleLoc, 3869 AttributeList *Attr); 3870 3871 DeclResult 3872 ActOnExplicitInstantiation(Scope *S, 3873 SourceLocation ExternLoc, 3874 SourceLocation TemplateLoc, 3875 unsigned TagSpec, 3876 SourceLocation KWLoc, 3877 CXXScopeSpec &SS, 3878 IdentifierInfo *Name, 3879 SourceLocation NameLoc, 3880 AttributeList *Attr); 3881 3882 DeclResult ActOnExplicitInstantiation(Scope *S, 3883 SourceLocation ExternLoc, 3884 SourceLocation TemplateLoc, 3885 Declarator &D); 3886 3887 TemplateArgumentLoc 3888 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 3889 SourceLocation TemplateLoc, 3890 SourceLocation RAngleLoc, 3891 Decl *Param, 3892 SmallVectorImpl<TemplateArgument> &Converted); 3893 3894 /// \brief Specifies the context in which a particular template 3895 /// argument is being checked. 3896 enum CheckTemplateArgumentKind { 3897 /// \brief The template argument was specified in the code or was 3898 /// instantiated with some deduced template arguments. 3899 CTAK_Specified, 3900 3901 /// \brief The template argument was deduced via template argument 3902 /// deduction. 3903 CTAK_Deduced, 3904 3905 /// \brief The template argument was deduced from an array bound 3906 /// via template argument deduction. 3907 CTAK_DeducedFromArrayBound 3908 }; 3909 3910 bool CheckTemplateArgument(NamedDecl *Param, 3911 const TemplateArgumentLoc &Arg, 3912 NamedDecl *Template, 3913 SourceLocation TemplateLoc, 3914 SourceLocation RAngleLoc, 3915 unsigned ArgumentPackIndex, 3916 SmallVectorImpl<TemplateArgument> &Converted, 3917 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3918 3919 /// \brief Check that the given template arguments can be be provided to 3920 /// the given template, converting the arguments along the way. 3921 /// 3922 /// \param Template The template to which the template arguments are being 3923 /// provided. 3924 /// 3925 /// \param TemplateLoc The location of the template name in the source. 3926 /// 3927 /// \param TemplateArgs The list of template arguments. If the template is 3928 /// a template template parameter, this function may extend the set of 3929 /// template arguments to also include substituted, defaulted template 3930 /// arguments. 3931 /// 3932 /// \param PartialTemplateArgs True if the list of template arguments is 3933 /// intentionally partial, e.g., because we're checking just the initial 3934 /// set of template arguments. 3935 /// 3936 /// \param Converted Will receive the converted, canonicalized template 3937 /// arguments. 3938 /// 3939 /// \returns True if an error occurred, false otherwise. 3940 bool CheckTemplateArgumentList(TemplateDecl *Template, 3941 SourceLocation TemplateLoc, 3942 TemplateArgumentListInfo &TemplateArgs, 3943 bool PartialTemplateArgs, 3944 SmallVectorImpl<TemplateArgument> &Converted); 3945 3946 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 3947 const TemplateArgumentLoc &Arg, 3948 SmallVectorImpl<TemplateArgument> &Converted); 3949 3950 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 3951 TypeSourceInfo *Arg); 3952 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 3953 TemplateArgument &Converted); 3954 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 3955 QualType InstantiatedParamType, Expr *Arg, 3956 TemplateArgument &Converted, 3957 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3958 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 3959 const TemplateArgumentLoc &Arg); 3960 3961 ExprResult 3962 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 3963 QualType ParamType, 3964 SourceLocation Loc); 3965 ExprResult 3966 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 3967 SourceLocation Loc); 3968 3969 /// \brief Enumeration describing how template parameter lists are compared 3970 /// for equality. 3971 enum TemplateParameterListEqualKind { 3972 /// \brief We are matching the template parameter lists of two templates 3973 /// that might be redeclarations. 3974 /// 3975 /// \code 3976 /// template<typename T> struct X; 3977 /// template<typename T> struct X; 3978 /// \endcode 3979 TPL_TemplateMatch, 3980 3981 /// \brief We are matching the template parameter lists of two template 3982 /// template parameters as part of matching the template parameter lists 3983 /// of two templates that might be redeclarations. 3984 /// 3985 /// \code 3986 /// template<template<int I> class TT> struct X; 3987 /// template<template<int Value> class Other> struct X; 3988 /// \endcode 3989 TPL_TemplateTemplateParmMatch, 3990 3991 /// \brief We are matching the template parameter lists of a template 3992 /// template argument against the template parameter lists of a template 3993 /// template parameter. 3994 /// 3995 /// \code 3996 /// template<template<int Value> class Metafun> struct X; 3997 /// template<int Value> struct integer_c; 3998 /// X<integer_c> xic; 3999 /// \endcode 4000 TPL_TemplateTemplateArgumentMatch 4001 }; 4002 4003 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 4004 TemplateParameterList *Old, 4005 bool Complain, 4006 TemplateParameterListEqualKind Kind, 4007 SourceLocation TemplateArgLoc 4008 = SourceLocation()); 4009 4010 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 4011 4012 /// \brief Called when the parser has parsed a C++ typename 4013 /// specifier, e.g., "typename T::type". 4014 /// 4015 /// \param S The scope in which this typename type occurs. 4016 /// \param TypenameLoc the location of the 'typename' keyword 4017 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4018 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 4019 /// \param IdLoc the location of the identifier. 4020 TypeResult 4021 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4022 const CXXScopeSpec &SS, const IdentifierInfo &II, 4023 SourceLocation IdLoc); 4024 4025 /// \brief Called when the parser has parsed a C++ typename 4026 /// specifier that ends in a template-id, e.g., 4027 /// "typename MetaFun::template apply<T1, T2>". 4028 /// 4029 /// \param S The scope in which this typename type occurs. 4030 /// \param TypenameLoc the location of the 'typename' keyword 4031 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4032 /// \param TemplateLoc the location of the 'template' keyword, if any. 4033 /// \param TemplateName The template name. 4034 /// \param TemplateNameLoc The location of the template name. 4035 /// \param LAngleLoc The location of the opening angle bracket ('<'). 4036 /// \param TemplateArgs The template arguments. 4037 /// \param RAngleLoc The location of the closing angle bracket ('>'). 4038 TypeResult 4039 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4040 const CXXScopeSpec &SS, 4041 SourceLocation TemplateLoc, 4042 TemplateTy Template, 4043 SourceLocation TemplateNameLoc, 4044 SourceLocation LAngleLoc, 4045 ASTTemplateArgsPtr TemplateArgs, 4046 SourceLocation RAngleLoc); 4047 4048 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 4049 SourceLocation KeywordLoc, 4050 NestedNameSpecifierLoc QualifierLoc, 4051 const IdentifierInfo &II, 4052 SourceLocation IILoc); 4053 4054 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 4055 SourceLocation Loc, 4056 DeclarationName Name); 4057 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 4058 4059 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 4060 4061 std::string 4062 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4063 const TemplateArgumentList &Args); 4064 4065 std::string 4066 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4067 const TemplateArgument *Args, 4068 unsigned NumArgs); 4069 4070 //===--------------------------------------------------------------------===// 4071 // C++ Variadic Templates (C++0x [temp.variadic]) 4072 //===--------------------------------------------------------------------===// 4073 4074 /// \brief The context in which an unexpanded parameter pack is 4075 /// being diagnosed. 4076 /// 4077 /// Note that the values of this enumeration line up with the first 4078 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4079 enum UnexpandedParameterPackContext { 4080 /// \brief An arbitrary expression. 4081 UPPC_Expression = 0, 4082 4083 /// \brief The base type of a class type. 4084 UPPC_BaseType, 4085 4086 /// \brief The type of an arbitrary declaration. 4087 UPPC_DeclarationType, 4088 4089 /// \brief The type of a data member. 4090 UPPC_DataMemberType, 4091 4092 /// \brief The size of a bit-field. 4093 UPPC_BitFieldWidth, 4094 4095 /// \brief The expression in a static assertion. 4096 UPPC_StaticAssertExpression, 4097 4098 /// \brief The fixed underlying type of an enumeration. 4099 UPPC_FixedUnderlyingType, 4100 4101 /// \brief The enumerator value. 4102 UPPC_EnumeratorValue, 4103 4104 /// \brief A using declaration. 4105 UPPC_UsingDeclaration, 4106 4107 /// \brief A friend declaration. 4108 UPPC_FriendDeclaration, 4109 4110 /// \brief A declaration qualifier. 4111 UPPC_DeclarationQualifier, 4112 4113 /// \brief An initializer. 4114 UPPC_Initializer, 4115 4116 /// \brief A default argument. 4117 UPPC_DefaultArgument, 4118 4119 /// \brief The type of a non-type template parameter. 4120 UPPC_NonTypeTemplateParameterType, 4121 4122 /// \brief The type of an exception. 4123 UPPC_ExceptionType, 4124 4125 /// \brief Partial specialization. 4126 UPPC_PartialSpecialization 4127 }; 4128 4129 /// \brief If the given type contains an unexpanded parameter pack, 4130 /// diagnose the error. 4131 /// 4132 /// \param Loc The source location where a diagnostc should be emitted. 4133 /// 4134 /// \param T The type that is being checked for unexpanded parameter 4135 /// packs. 4136 /// 4137 /// \returns true if an error occurred, false otherwise. 4138 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4139 UnexpandedParameterPackContext UPPC); 4140 4141 /// \brief If the given expression contains an unexpanded parameter 4142 /// pack, diagnose the error. 4143 /// 4144 /// \param E The expression that is being checked for unexpanded 4145 /// parameter packs. 4146 /// 4147 /// \returns true if an error occurred, false otherwise. 4148 bool DiagnoseUnexpandedParameterPack(Expr *E, 4149 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4150 4151 /// \brief If the given nested-name-specifier contains an unexpanded 4152 /// parameter pack, diagnose the error. 4153 /// 4154 /// \param SS The nested-name-specifier that is being checked for 4155 /// unexpanded parameter packs. 4156 /// 4157 /// \returns true if an error occurred, false otherwise. 4158 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4159 UnexpandedParameterPackContext UPPC); 4160 4161 /// \brief If the given name contains an unexpanded parameter pack, 4162 /// diagnose the error. 4163 /// 4164 /// \param NameInfo The name (with source location information) that 4165 /// is being checked for unexpanded parameter packs. 4166 /// 4167 /// \returns true if an error occurred, false otherwise. 4168 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4169 UnexpandedParameterPackContext UPPC); 4170 4171 /// \brief If the given template name contains an unexpanded parameter pack, 4172 /// diagnose the error. 4173 /// 4174 /// \param Loc The location of the template name. 4175 /// 4176 /// \param Template The template name that is being checked for unexpanded 4177 /// parameter packs. 4178 /// 4179 /// \returns true if an error occurred, false otherwise. 4180 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4181 TemplateName Template, 4182 UnexpandedParameterPackContext UPPC); 4183 4184 /// \brief If the given template argument contains an unexpanded parameter 4185 /// pack, diagnose the error. 4186 /// 4187 /// \param Arg The template argument that is being checked for unexpanded 4188 /// parameter packs. 4189 /// 4190 /// \returns true if an error occurred, false otherwise. 4191 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4192 UnexpandedParameterPackContext UPPC); 4193 4194 /// \brief Collect the set of unexpanded parameter packs within the given 4195 /// template argument. 4196 /// 4197 /// \param Arg The template argument that will be traversed to find 4198 /// unexpanded parameter packs. 4199 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4200 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4201 4202 /// \brief Collect the set of unexpanded parameter packs within the given 4203 /// template argument. 4204 /// 4205 /// \param Arg The template argument that will be traversed to find 4206 /// unexpanded parameter packs. 4207 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4208 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4209 4210 /// \brief Collect the set of unexpanded parameter packs within the given 4211 /// type. 4212 /// 4213 /// \param T The type that will be traversed to find 4214 /// unexpanded parameter packs. 4215 void collectUnexpandedParameterPacks(QualType T, 4216 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4217 4218 /// \brief Collect the set of unexpanded parameter packs within the given 4219 /// type. 4220 /// 4221 /// \param TL The type that will be traversed to find 4222 /// unexpanded parameter packs. 4223 void collectUnexpandedParameterPacks(TypeLoc TL, 4224 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4225 4226 /// \brief Invoked when parsing a template argument followed by an 4227 /// ellipsis, which creates a pack expansion. 4228 /// 4229 /// \param Arg The template argument preceding the ellipsis, which 4230 /// may already be invalid. 4231 /// 4232 /// \param EllipsisLoc The location of the ellipsis. 4233 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4234 SourceLocation EllipsisLoc); 4235 4236 /// \brief Invoked when parsing a type followed by an ellipsis, which 4237 /// creates a pack expansion. 4238 /// 4239 /// \param Type The type preceding the ellipsis, which will become 4240 /// the pattern of the pack expansion. 4241 /// 4242 /// \param EllipsisLoc The location of the ellipsis. 4243 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4244 4245 /// \brief Construct a pack expansion type from the pattern of the pack 4246 /// expansion. 4247 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4248 SourceLocation EllipsisLoc, 4249 llvm::Optional<unsigned> NumExpansions); 4250 4251 /// \brief Construct a pack expansion type from the pattern of the pack 4252 /// expansion. 4253 QualType CheckPackExpansion(QualType Pattern, 4254 SourceRange PatternRange, 4255 SourceLocation EllipsisLoc, 4256 llvm::Optional<unsigned> NumExpansions); 4257 4258 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4259 /// creates a pack expansion. 4260 /// 4261 /// \param Pattern The expression preceding the ellipsis, which will become 4262 /// the pattern of the pack expansion. 4263 /// 4264 /// \param EllipsisLoc The location of the ellipsis. 4265 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4266 4267 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4268 /// creates a pack expansion. 4269 /// 4270 /// \param Pattern The expression preceding the ellipsis, which will become 4271 /// the pattern of the pack expansion. 4272 /// 4273 /// \param EllipsisLoc The location of the ellipsis. 4274 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4275 llvm::Optional<unsigned> NumExpansions); 4276 4277 /// \brief Determine whether we could expand a pack expansion with the 4278 /// given set of parameter packs into separate arguments by repeatedly 4279 /// transforming the pattern. 4280 /// 4281 /// \param EllipsisLoc The location of the ellipsis that identifies the 4282 /// pack expansion. 4283 /// 4284 /// \param PatternRange The source range that covers the entire pattern of 4285 /// the pack expansion. 4286 /// 4287 /// \param Unexpanded The set of unexpanded parameter packs within the 4288 /// pattern. 4289 /// 4290 /// \param NumUnexpanded The number of unexpanded parameter packs in 4291 /// \p Unexpanded. 4292 /// 4293 /// \param ShouldExpand Will be set to \c true if the transformer should 4294 /// expand the corresponding pack expansions into separate arguments. When 4295 /// set, \c NumExpansions must also be set. 4296 /// 4297 /// \param RetainExpansion Whether the caller should add an unexpanded 4298 /// pack expansion after all of the expanded arguments. This is used 4299 /// when extending explicitly-specified template argument packs per 4300 /// C++0x [temp.arg.explicit]p9. 4301 /// 4302 /// \param NumExpansions The number of separate arguments that will be in 4303 /// the expanded form of the corresponding pack expansion. This is both an 4304 /// input and an output parameter, which can be set by the caller if the 4305 /// number of expansions is known a priori (e.g., due to a prior substitution) 4306 /// and will be set by the callee when the number of expansions is known. 4307 /// The callee must set this value when \c ShouldExpand is \c true; it may 4308 /// set this value in other cases. 4309 /// 4310 /// \returns true if an error occurred (e.g., because the parameter packs 4311 /// are to be instantiated with arguments of different lengths), false 4312 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4313 /// must be set. 4314 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4315 SourceRange PatternRange, 4316 const UnexpandedParameterPack *Unexpanded, 4317 unsigned NumUnexpanded, 4318 const MultiLevelTemplateArgumentList &TemplateArgs, 4319 bool &ShouldExpand, 4320 bool &RetainExpansion, 4321 llvm::Optional<unsigned> &NumExpansions); 4322 4323 /// \brief Determine the number of arguments in the given pack expansion 4324 /// type. 4325 /// 4326 /// This routine already assumes that the pack expansion type can be 4327 /// expanded and that the number of arguments in the expansion is 4328 /// consistent across all of the unexpanded parameter packs in its pattern. 4329 unsigned getNumArgumentsInExpansion(QualType T, 4330 const MultiLevelTemplateArgumentList &TemplateArgs); 4331 4332 /// \brief Determine whether the given declarator contains any unexpanded 4333 /// parameter packs. 4334 /// 4335 /// This routine is used by the parser to disambiguate function declarators 4336 /// with an ellipsis prior to the ')', e.g., 4337 /// 4338 /// \code 4339 /// void f(T...); 4340 /// \endcode 4341 /// 4342 /// To determine whether we have an (unnamed) function parameter pack or 4343 /// a variadic function. 4344 /// 4345 /// \returns true if the declarator contains any unexpanded parameter packs, 4346 /// false otherwise. 4347 bool containsUnexpandedParameterPacks(Declarator &D); 4348 4349 //===--------------------------------------------------------------------===// 4350 // C++ Template Argument Deduction (C++ [temp.deduct]) 4351 //===--------------------------------------------------------------------===// 4352 4353 /// \brief Describes the result of template argument deduction. 4354 /// 4355 /// The TemplateDeductionResult enumeration describes the result of 4356 /// template argument deduction, as returned from 4357 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4358 /// structure provides additional information about the results of 4359 /// template argument deduction, e.g., the deduced template argument 4360 /// list (if successful) or the specific template parameters or 4361 /// deduced arguments that were involved in the failure. 4362 enum TemplateDeductionResult { 4363 /// \brief Template argument deduction was successful. 4364 TDK_Success = 0, 4365 /// \brief Template argument deduction exceeded the maximum template 4366 /// instantiation depth (which has already been diagnosed). 4367 TDK_InstantiationDepth, 4368 /// \brief Template argument deduction did not deduce a value 4369 /// for every template parameter. 4370 TDK_Incomplete, 4371 /// \brief Template argument deduction produced inconsistent 4372 /// deduced values for the given template parameter. 4373 TDK_Inconsistent, 4374 /// \brief Template argument deduction failed due to inconsistent 4375 /// cv-qualifiers on a template parameter type that would 4376 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4377 /// but were given a non-const "X". 4378 TDK_Underqualified, 4379 /// \brief Substitution of the deduced template argument values 4380 /// resulted in an error. 4381 TDK_SubstitutionFailure, 4382 /// \brief Substitution of the deduced template argument values 4383 /// into a non-deduced context produced a type or value that 4384 /// produces a type that does not match the original template 4385 /// arguments provided. 4386 TDK_NonDeducedMismatch, 4387 /// \brief When performing template argument deduction for a function 4388 /// template, there were too many call arguments. 4389 TDK_TooManyArguments, 4390 /// \brief When performing template argument deduction for a function 4391 /// template, there were too few call arguments. 4392 TDK_TooFewArguments, 4393 /// \brief The explicitly-specified template arguments were not valid 4394 /// template arguments for the given template. 4395 TDK_InvalidExplicitArguments, 4396 /// \brief The arguments included an overloaded function name that could 4397 /// not be resolved to a suitable function. 4398 TDK_FailedOverloadResolution 4399 }; 4400 4401 TemplateDeductionResult 4402 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4403 const TemplateArgumentList &TemplateArgs, 4404 sema::TemplateDeductionInfo &Info); 4405 4406 TemplateDeductionResult 4407 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4408 TemplateArgumentListInfo &ExplicitTemplateArgs, 4409 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4410 SmallVectorImpl<QualType> &ParamTypes, 4411 QualType *FunctionType, 4412 sema::TemplateDeductionInfo &Info); 4413 4414 /// brief A function argument from which we performed template argument 4415 // deduction for a call. 4416 struct OriginalCallArg { 4417 OriginalCallArg(QualType OriginalParamType, 4418 unsigned ArgIdx, 4419 QualType OriginalArgType) 4420 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4421 OriginalArgType(OriginalArgType) { } 4422 4423 QualType OriginalParamType; 4424 unsigned ArgIdx; 4425 QualType OriginalArgType; 4426 }; 4427 4428 TemplateDeductionResult 4429 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4430 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4431 unsigned NumExplicitlySpecified, 4432 FunctionDecl *&Specialization, 4433 sema::TemplateDeductionInfo &Info, 4434 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4435 4436 TemplateDeductionResult 4437 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4438 TemplateArgumentListInfo *ExplicitTemplateArgs, 4439 Expr **Args, unsigned NumArgs, 4440 FunctionDecl *&Specialization, 4441 sema::TemplateDeductionInfo &Info); 4442 4443 TemplateDeductionResult 4444 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4445 TemplateArgumentListInfo *ExplicitTemplateArgs, 4446 QualType ArgFunctionType, 4447 FunctionDecl *&Specialization, 4448 sema::TemplateDeductionInfo &Info); 4449 4450 TemplateDeductionResult 4451 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4452 QualType ToType, 4453 CXXConversionDecl *&Specialization, 4454 sema::TemplateDeductionInfo &Info); 4455 4456 TemplateDeductionResult 4457 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4458 TemplateArgumentListInfo *ExplicitTemplateArgs, 4459 FunctionDecl *&Specialization, 4460 sema::TemplateDeductionInfo &Info); 4461 4462 bool DeduceAutoType(TypeSourceInfo *AutoType, Expr *Initializer, 4463 TypeSourceInfo *&Result); 4464 4465 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4466 FunctionTemplateDecl *FT2, 4467 SourceLocation Loc, 4468 TemplatePartialOrderingContext TPOC, 4469 unsigned NumCallArguments); 4470 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4471 UnresolvedSetIterator SEnd, 4472 TemplatePartialOrderingContext TPOC, 4473 unsigned NumCallArguments, 4474 SourceLocation Loc, 4475 const PartialDiagnostic &NoneDiag, 4476 const PartialDiagnostic &AmbigDiag, 4477 const PartialDiagnostic &CandidateDiag, 4478 bool Complain = true); 4479 4480 ClassTemplatePartialSpecializationDecl * 4481 getMoreSpecializedPartialSpecialization( 4482 ClassTemplatePartialSpecializationDecl *PS1, 4483 ClassTemplatePartialSpecializationDecl *PS2, 4484 SourceLocation Loc); 4485 4486 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4487 bool OnlyDeduced, 4488 unsigned Depth, 4489 SmallVectorImpl<bool> &Used); 4490 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4491 SmallVectorImpl<bool> &Deduced); 4492 4493 //===--------------------------------------------------------------------===// 4494 // C++ Template Instantiation 4495 // 4496 4497 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4498 const TemplateArgumentList *Innermost = 0, 4499 bool RelativeToPrimary = false, 4500 const FunctionDecl *Pattern = 0); 4501 4502 /// \brief A template instantiation that is currently in progress. 4503 struct ActiveTemplateInstantiation { 4504 /// \brief The kind of template instantiation we are performing 4505 enum InstantiationKind { 4506 /// We are instantiating a template declaration. The entity is 4507 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4508 TemplateInstantiation, 4509 4510 /// We are instantiating a default argument for a template 4511 /// parameter. The Entity is the template, and 4512 /// TemplateArgs/NumTemplateArguments provides the template 4513 /// arguments as specified. 4514 /// FIXME: Use a TemplateArgumentList 4515 DefaultTemplateArgumentInstantiation, 4516 4517 /// We are instantiating a default argument for a function. 4518 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4519 /// provides the template arguments as specified. 4520 DefaultFunctionArgumentInstantiation, 4521 4522 /// We are substituting explicit template arguments provided for 4523 /// a function template. The entity is a FunctionTemplateDecl. 4524 ExplicitTemplateArgumentSubstitution, 4525 4526 /// We are substituting template argument determined as part of 4527 /// template argument deduction for either a class template 4528 /// partial specialization or a function template. The 4529 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4530 /// a FunctionTemplateDecl. 4531 DeducedTemplateArgumentSubstitution, 4532 4533 /// We are substituting prior template arguments into a new 4534 /// template parameter. The template parameter itself is either a 4535 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4536 PriorTemplateArgumentSubstitution, 4537 4538 /// We are checking the validity of a default template argument that 4539 /// has been used when naming a template-id. 4540 DefaultTemplateArgumentChecking 4541 } Kind; 4542 4543 /// \brief The point of instantiation within the source code. 4544 SourceLocation PointOfInstantiation; 4545 4546 /// \brief The template (or partial specialization) in which we are 4547 /// performing the instantiation, for substitutions of prior template 4548 /// arguments. 4549 NamedDecl *Template; 4550 4551 /// \brief The entity that is being instantiated. 4552 uintptr_t Entity; 4553 4554 /// \brief The list of template arguments we are substituting, if they 4555 /// are not part of the entity. 4556 const TemplateArgument *TemplateArgs; 4557 4558 /// \brief The number of template arguments in TemplateArgs. 4559 unsigned NumTemplateArgs; 4560 4561 /// \brief The template deduction info object associated with the 4562 /// substitution or checking of explicit or deduced template arguments. 4563 sema::TemplateDeductionInfo *DeductionInfo; 4564 4565 /// \brief The source range that covers the construct that cause 4566 /// the instantiation, e.g., the template-id that causes a class 4567 /// template instantiation. 4568 SourceRange InstantiationRange; 4569 4570 ActiveTemplateInstantiation() 4571 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4572 NumTemplateArgs(0), DeductionInfo(0) {} 4573 4574 /// \brief Determines whether this template is an actual instantiation 4575 /// that should be counted toward the maximum instantiation depth. 4576 bool isInstantiationRecord() const; 4577 4578 friend bool operator==(const ActiveTemplateInstantiation &X, 4579 const ActiveTemplateInstantiation &Y) { 4580 if (X.Kind != Y.Kind) 4581 return false; 4582 4583 if (X.Entity != Y.Entity) 4584 return false; 4585 4586 switch (X.Kind) { 4587 case TemplateInstantiation: 4588 return true; 4589 4590 case PriorTemplateArgumentSubstitution: 4591 case DefaultTemplateArgumentChecking: 4592 if (X.Template != Y.Template) 4593 return false; 4594 4595 // Fall through 4596 4597 case DefaultTemplateArgumentInstantiation: 4598 case ExplicitTemplateArgumentSubstitution: 4599 case DeducedTemplateArgumentSubstitution: 4600 case DefaultFunctionArgumentInstantiation: 4601 return X.TemplateArgs == Y.TemplateArgs; 4602 4603 } 4604 4605 return true; 4606 } 4607 4608 friend bool operator!=(const ActiveTemplateInstantiation &X, 4609 const ActiveTemplateInstantiation &Y) { 4610 return !(X == Y); 4611 } 4612 }; 4613 4614 /// \brief List of active template instantiations. 4615 /// 4616 /// This vector is treated as a stack. As one template instantiation 4617 /// requires another template instantiation, additional 4618 /// instantiations are pushed onto the stack up to a 4619 /// user-configurable limit LangOptions::InstantiationDepth. 4620 SmallVector<ActiveTemplateInstantiation, 16> 4621 ActiveTemplateInstantiations; 4622 4623 /// \brief Whether we are in a SFINAE context that is not associated with 4624 /// template instantiation. 4625 /// 4626 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4627 /// of a template instantiation or template argument deduction. 4628 bool InNonInstantiationSFINAEContext; 4629 4630 /// \brief The number of ActiveTemplateInstantiation entries in 4631 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4632 /// therefore, should not be counted as part of the instantiation depth. 4633 unsigned NonInstantiationEntries; 4634 4635 /// \brief The last template from which a template instantiation 4636 /// error or warning was produced. 4637 /// 4638 /// This value is used to suppress printing of redundant template 4639 /// instantiation backtraces when there are multiple errors in the 4640 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4641 /// to implement it anywhere else. 4642 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4643 4644 /// \brief The current index into pack expansion arguments that will be 4645 /// used for substitution of parameter packs. 4646 /// 4647 /// The pack expansion index will be -1 to indicate that parameter packs 4648 /// should be instantiated as themselves. Otherwise, the index specifies 4649 /// which argument within the parameter pack will be used for substitution. 4650 int ArgumentPackSubstitutionIndex; 4651 4652 /// \brief RAII object used to change the argument pack substitution index 4653 /// within a \c Sema object. 4654 /// 4655 /// See \c ArgumentPackSubstitutionIndex for more information. 4656 class ArgumentPackSubstitutionIndexRAII { 4657 Sema &Self; 4658 int OldSubstitutionIndex; 4659 4660 public: 4661 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4662 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4663 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4664 } 4665 4666 ~ArgumentPackSubstitutionIndexRAII() { 4667 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4668 } 4669 }; 4670 4671 friend class ArgumentPackSubstitutionRAII; 4672 4673 /// \brief The stack of calls expression undergoing template instantiation. 4674 /// 4675 /// The top of this stack is used by a fixit instantiating unresolved 4676 /// function calls to fix the AST to match the textual change it prints. 4677 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4678 4679 /// \brief For each declaration that involved template argument deduction, the 4680 /// set of diagnostics that were suppressed during that template argument 4681 /// deduction. 4682 /// 4683 /// FIXME: Serialize this structure to the AST file. 4684 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 4685 SuppressedDiagnostics; 4686 4687 /// \brief A stack object to be created when performing template 4688 /// instantiation. 4689 /// 4690 /// Construction of an object of type \c InstantiatingTemplate 4691 /// pushes the current instantiation onto the stack of active 4692 /// instantiations. If the size of this stack exceeds the maximum 4693 /// number of recursive template instantiations, construction 4694 /// produces an error and evaluates true. 4695 /// 4696 /// Destruction of this object will pop the named instantiation off 4697 /// the stack. 4698 struct InstantiatingTemplate { 4699 /// \brief Note that we are instantiating a class template, 4700 /// function template, or a member thereof. 4701 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4702 Decl *Entity, 4703 SourceRange InstantiationRange = SourceRange()); 4704 4705 /// \brief Note that we are instantiating a default argument in a 4706 /// template-id. 4707 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4708 TemplateDecl *Template, 4709 const TemplateArgument *TemplateArgs, 4710 unsigned NumTemplateArgs, 4711 SourceRange InstantiationRange = SourceRange()); 4712 4713 /// \brief Note that we are instantiating a default argument in a 4714 /// template-id. 4715 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4716 FunctionTemplateDecl *FunctionTemplate, 4717 const TemplateArgument *TemplateArgs, 4718 unsigned NumTemplateArgs, 4719 ActiveTemplateInstantiation::InstantiationKind Kind, 4720 sema::TemplateDeductionInfo &DeductionInfo, 4721 SourceRange InstantiationRange = SourceRange()); 4722 4723 /// \brief Note that we are instantiating as part of template 4724 /// argument deduction for a class template partial 4725 /// specialization. 4726 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4727 ClassTemplatePartialSpecializationDecl *PartialSpec, 4728 const TemplateArgument *TemplateArgs, 4729 unsigned NumTemplateArgs, 4730 sema::TemplateDeductionInfo &DeductionInfo, 4731 SourceRange InstantiationRange = SourceRange()); 4732 4733 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4734 ParmVarDecl *Param, 4735 const TemplateArgument *TemplateArgs, 4736 unsigned NumTemplateArgs, 4737 SourceRange InstantiationRange = SourceRange()); 4738 4739 /// \brief Note that we are substituting prior template arguments into a 4740 /// non-type or template template parameter. 4741 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4742 NamedDecl *Template, 4743 NonTypeTemplateParmDecl *Param, 4744 const TemplateArgument *TemplateArgs, 4745 unsigned NumTemplateArgs, 4746 SourceRange InstantiationRange); 4747 4748 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4749 NamedDecl *Template, 4750 TemplateTemplateParmDecl *Param, 4751 const TemplateArgument *TemplateArgs, 4752 unsigned NumTemplateArgs, 4753 SourceRange InstantiationRange); 4754 4755 /// \brief Note that we are checking the default template argument 4756 /// against the template parameter for a given template-id. 4757 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4758 TemplateDecl *Template, 4759 NamedDecl *Param, 4760 const TemplateArgument *TemplateArgs, 4761 unsigned NumTemplateArgs, 4762 SourceRange InstantiationRange); 4763 4764 4765 /// \brief Note that we have finished instantiating this template. 4766 void Clear(); 4767 4768 ~InstantiatingTemplate() { Clear(); } 4769 4770 /// \brief Determines whether we have exceeded the maximum 4771 /// recursive template instantiations. 4772 operator bool() const { return Invalid; } 4773 4774 private: 4775 Sema &SemaRef; 4776 bool Invalid; 4777 bool SavedInNonInstantiationSFINAEContext; 4778 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4779 SourceRange InstantiationRange); 4780 4781 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4782 4783 InstantiatingTemplate& 4784 operator=(const InstantiatingTemplate&); // not implemented 4785 }; 4786 4787 void PrintInstantiationStack(); 4788 4789 /// \brief Determines whether we are currently in a context where 4790 /// template argument substitution failures are not considered 4791 /// errors. 4792 /// 4793 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4794 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4795 /// template-deduction context object, which can be used to capture 4796 /// diagnostics that will be suppressed. 4797 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4798 4799 /// \brief RAII class used to determine whether SFINAE has 4800 /// trapped any errors that occur during template argument 4801 /// deduction.` 4802 class SFINAETrap { 4803 Sema &SemaRef; 4804 unsigned PrevSFINAEErrors; 4805 bool PrevInNonInstantiationSFINAEContext; 4806 bool PrevAccessCheckingSFINAE; 4807 4808 public: 4809 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 4810 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 4811 PrevInNonInstantiationSFINAEContext( 4812 SemaRef.InNonInstantiationSFINAEContext), 4813 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 4814 { 4815 if (!SemaRef.isSFINAEContext()) 4816 SemaRef.InNonInstantiationSFINAEContext = true; 4817 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 4818 } 4819 4820 ~SFINAETrap() { 4821 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 4822 SemaRef.InNonInstantiationSFINAEContext 4823 = PrevInNonInstantiationSFINAEContext; 4824 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 4825 } 4826 4827 /// \brief Determine whether any SFINAE errors have been trapped. 4828 bool hasErrorOccurred() const { 4829 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 4830 } 4831 }; 4832 4833 /// \brief The current instantiation scope used to store local 4834 /// variables. 4835 LocalInstantiationScope *CurrentInstantiationScope; 4836 4837 /// \brief The number of typos corrected by CorrectTypo. 4838 unsigned TyposCorrected; 4839 4840 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 4841 UnqualifiedTyposCorrectedMap; 4842 4843 /// \brief A cache containing the results of typo correction for unqualified 4844 /// name lookup. 4845 /// 4846 /// The string is the string that we corrected to (which may be empty, if 4847 /// there was no correction), while the boolean will be true when the 4848 /// string represents a keyword. 4849 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 4850 4851 /// \brief Worker object for performing CFG-based warnings. 4852 sema::AnalysisBasedWarnings AnalysisWarnings; 4853 4854 /// \brief An entity for which implicit template instantiation is required. 4855 /// 4856 /// The source location associated with the declaration is the first place in 4857 /// the source code where the declaration was "used". It is not necessarily 4858 /// the point of instantiation (which will be either before or after the 4859 /// namespace-scope declaration that triggered this implicit instantiation), 4860 /// However, it is the location that diagnostics should generally refer to, 4861 /// because users will need to know what code triggered the instantiation. 4862 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 4863 4864 /// \brief The queue of implicit template instantiations that are required 4865 /// but have not yet been performed. 4866 std::deque<PendingImplicitInstantiation> PendingInstantiations; 4867 4868 /// \brief The queue of implicit template instantiations that are required 4869 /// and must be performed within the current local scope. 4870 /// 4871 /// This queue is only used for member functions of local classes in 4872 /// templates, which must be instantiated in the same scope as their 4873 /// enclosing function, so that they can reference function-local 4874 /// types, static variables, enumerators, etc. 4875 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 4876 4877 void PerformPendingInstantiations(bool LocalOnly = false); 4878 4879 TypeSourceInfo *SubstType(TypeSourceInfo *T, 4880 const MultiLevelTemplateArgumentList &TemplateArgs, 4881 SourceLocation Loc, DeclarationName Entity); 4882 4883 QualType SubstType(QualType T, 4884 const MultiLevelTemplateArgumentList &TemplateArgs, 4885 SourceLocation Loc, DeclarationName Entity); 4886 4887 TypeSourceInfo *SubstType(TypeLoc TL, 4888 const MultiLevelTemplateArgumentList &TemplateArgs, 4889 SourceLocation Loc, DeclarationName Entity); 4890 4891 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 4892 const MultiLevelTemplateArgumentList &TemplateArgs, 4893 SourceLocation Loc, 4894 DeclarationName Entity); 4895 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 4896 const MultiLevelTemplateArgumentList &TemplateArgs, 4897 int indexAdjustment, 4898 llvm::Optional<unsigned> NumExpansions); 4899 bool SubstParmTypes(SourceLocation Loc, 4900 ParmVarDecl **Params, unsigned NumParams, 4901 const MultiLevelTemplateArgumentList &TemplateArgs, 4902 SmallVectorImpl<QualType> &ParamTypes, 4903 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 4904 ExprResult SubstExpr(Expr *E, 4905 const MultiLevelTemplateArgumentList &TemplateArgs); 4906 4907 /// \brief Substitute the given template arguments into a list of 4908 /// expressions, expanding pack expansions if required. 4909 /// 4910 /// \param Exprs The list of expressions to substitute into. 4911 /// 4912 /// \param NumExprs The number of expressions in \p Exprs. 4913 /// 4914 /// \param IsCall Whether this is some form of call, in which case 4915 /// default arguments will be dropped. 4916 /// 4917 /// \param TemplateArgs The set of template arguments to substitute. 4918 /// 4919 /// \param Outputs Will receive all of the substituted arguments. 4920 /// 4921 /// \returns true if an error occurred, false otherwise. 4922 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 4923 const MultiLevelTemplateArgumentList &TemplateArgs, 4924 SmallVectorImpl<Expr *> &Outputs); 4925 4926 StmtResult SubstStmt(Stmt *S, 4927 const MultiLevelTemplateArgumentList &TemplateArgs); 4928 4929 Decl *SubstDecl(Decl *D, DeclContext *Owner, 4930 const MultiLevelTemplateArgumentList &TemplateArgs); 4931 4932 bool 4933 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 4934 CXXRecordDecl *Pattern, 4935 const MultiLevelTemplateArgumentList &TemplateArgs); 4936 4937 bool 4938 InstantiateClass(SourceLocation PointOfInstantiation, 4939 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 4940 const MultiLevelTemplateArgumentList &TemplateArgs, 4941 TemplateSpecializationKind TSK, 4942 bool Complain = true); 4943 4944 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 4945 const Decl *Pattern, Decl *Inst); 4946 4947 bool 4948 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 4949 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4950 TemplateSpecializationKind TSK, 4951 bool Complain = true); 4952 4953 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 4954 CXXRecordDecl *Instantiation, 4955 const MultiLevelTemplateArgumentList &TemplateArgs, 4956 TemplateSpecializationKind TSK); 4957 4958 void InstantiateClassTemplateSpecializationMembers( 4959 SourceLocation PointOfInstantiation, 4960 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4961 TemplateSpecializationKind TSK); 4962 4963 NestedNameSpecifierLoc 4964 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 4965 const MultiLevelTemplateArgumentList &TemplateArgs); 4966 4967 DeclarationNameInfo 4968 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 4969 const MultiLevelTemplateArgumentList &TemplateArgs); 4970 TemplateName 4971 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 4972 SourceLocation Loc, 4973 const MultiLevelTemplateArgumentList &TemplateArgs); 4974 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 4975 TemplateArgumentListInfo &Result, 4976 const MultiLevelTemplateArgumentList &TemplateArgs); 4977 4978 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 4979 FunctionDecl *Function, 4980 bool Recursive = false, 4981 bool DefinitionRequired = false); 4982 void InstantiateStaticDataMemberDefinition( 4983 SourceLocation PointOfInstantiation, 4984 VarDecl *Var, 4985 bool Recursive = false, 4986 bool DefinitionRequired = false); 4987 4988 void InstantiateMemInitializers(CXXConstructorDecl *New, 4989 const CXXConstructorDecl *Tmpl, 4990 const MultiLevelTemplateArgumentList &TemplateArgs); 4991 bool InstantiateInitializer(Expr *Init, 4992 const MultiLevelTemplateArgumentList &TemplateArgs, 4993 SourceLocation &LParenLoc, 4994 ASTOwningVector<Expr*> &NewArgs, 4995 SourceLocation &RParenLoc); 4996 4997 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 4998 const MultiLevelTemplateArgumentList &TemplateArgs); 4999 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 5000 const MultiLevelTemplateArgumentList &TemplateArgs); 5001 5002 // Objective-C declarations. 5003 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 5004 IdentifierInfo *ClassName, 5005 SourceLocation ClassLoc, 5006 IdentifierInfo *SuperName, 5007 SourceLocation SuperLoc, 5008 Decl * const *ProtoRefs, 5009 unsigned NumProtoRefs, 5010 const SourceLocation *ProtoLocs, 5011 SourceLocation EndProtoLoc, 5012 AttributeList *AttrList); 5013 5014 Decl *ActOnCompatiblityAlias( 5015 SourceLocation AtCompatibilityAliasLoc, 5016 IdentifierInfo *AliasName, SourceLocation AliasLocation, 5017 IdentifierInfo *ClassName, SourceLocation ClassLocation); 5018 5019 bool CheckForwardProtocolDeclarationForCircularDependency( 5020 IdentifierInfo *PName, 5021 SourceLocation &PLoc, SourceLocation PrevLoc, 5022 const ObjCList<ObjCProtocolDecl> &PList); 5023 5024 Decl *ActOnStartProtocolInterface( 5025 SourceLocation AtProtoInterfaceLoc, 5026 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 5027 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 5028 const SourceLocation *ProtoLocs, 5029 SourceLocation EndProtoLoc, 5030 AttributeList *AttrList); 5031 5032 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 5033 IdentifierInfo *ClassName, 5034 SourceLocation ClassLoc, 5035 IdentifierInfo *CategoryName, 5036 SourceLocation CategoryLoc, 5037 Decl * const *ProtoRefs, 5038 unsigned NumProtoRefs, 5039 const SourceLocation *ProtoLocs, 5040 SourceLocation EndProtoLoc); 5041 5042 Decl *ActOnStartClassImplementation( 5043 SourceLocation AtClassImplLoc, 5044 IdentifierInfo *ClassName, SourceLocation ClassLoc, 5045 IdentifierInfo *SuperClassname, 5046 SourceLocation SuperClassLoc); 5047 5048 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 5049 IdentifierInfo *ClassName, 5050 SourceLocation ClassLoc, 5051 IdentifierInfo *CatName, 5052 SourceLocation CatLoc); 5053 5054 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc, 5055 IdentifierInfo **IdentList, 5056 SourceLocation *IdentLocs, 5057 unsigned NumElts); 5058 5059 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 5060 const IdentifierLocPair *IdentList, 5061 unsigned NumElts, 5062 AttributeList *attrList); 5063 5064 void FindProtocolDeclaration(bool WarnOnDeclarations, 5065 const IdentifierLocPair *ProtocolId, 5066 unsigned NumProtocols, 5067 SmallVectorImpl<Decl *> &Protocols); 5068 5069 /// Ensure attributes are consistent with type. 5070 /// \param [in, out] Attributes The attributes to check; they will 5071 /// be modified to be consistent with \arg PropertyTy. 5072 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5073 SourceLocation Loc, 5074 unsigned &Attributes); 5075 5076 /// Process the specified property declaration and create decls for the 5077 /// setters and getters as needed. 5078 /// \param property The property declaration being processed 5079 /// \param DC The semantic container for the property 5080 /// \param redeclaredProperty Declaration for property if redeclared 5081 /// in class extension. 5082 /// \param lexicalDC Container for redeclaredProperty. 5083 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5084 ObjCContainerDecl *DC, 5085 ObjCPropertyDecl *redeclaredProperty = 0, 5086 ObjCContainerDecl *lexicalDC = 0); 5087 5088 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5089 ObjCPropertyDecl *SuperProperty, 5090 const IdentifierInfo *Name); 5091 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5092 5093 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5094 ObjCMethodDecl *MethodDecl, 5095 bool IsInstance); 5096 5097 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5098 5099 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5100 ObjCInterfaceDecl *ID); 5101 5102 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5103 ObjCProtocolDecl *PDecl); 5104 5105 void ActOnAtEnd(Scope *S, SourceRange AtEnd, 5106 Decl **allMethods = 0, unsigned allNum = 0, 5107 Decl **allProperties = 0, unsigned pNum = 0, 5108 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5109 5110 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5111 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5112 Selector GetterSel, Selector SetterSel, 5113 bool *OverridingProperty, 5114 tok::ObjCKeywordKind MethodImplKind, 5115 DeclContext *lexicalDC = 0); 5116 5117 Decl *ActOnPropertyImplDecl(Scope *S, 5118 SourceLocation AtLoc, 5119 SourceLocation PropertyLoc, 5120 bool ImplKind, 5121 IdentifierInfo *PropertyId, 5122 IdentifierInfo *PropertyIvar, 5123 SourceLocation PropertyIvarLoc); 5124 5125 enum ObjCSpecialMethodKind { 5126 OSMK_None, 5127 OSMK_Alloc, 5128 OSMK_New, 5129 OSMK_Copy, 5130 OSMK_RetainingInit, 5131 OSMK_NonRetainingInit 5132 }; 5133 5134 struct ObjCArgInfo { 5135 IdentifierInfo *Name; 5136 SourceLocation NameLoc; 5137 // The Type is null if no type was specified, and the DeclSpec is invalid 5138 // in this case. 5139 ParsedType Type; 5140 ObjCDeclSpec DeclSpec; 5141 5142 /// ArgAttrs - Attribute list for this argument. 5143 AttributeList *ArgAttrs; 5144 }; 5145 5146 Decl *ActOnMethodDeclaration( 5147 Scope *S, 5148 SourceLocation BeginLoc, // location of the + or -. 5149 SourceLocation EndLoc, // location of the ; or {. 5150 tok::TokenKind MethodType, 5151 ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5152 SourceLocation SelectorStartLoc, Selector Sel, 5153 // optional arguments. The number of types/arguments is obtained 5154 // from the Sel.getNumArgs(). 5155 ObjCArgInfo *ArgInfo, 5156 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5157 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5158 bool isVariadic, bool MethodDefinition); 5159 5160 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5161 // Will search "local" class/category implementations for a method decl. 5162 // Will also search in class's root looking for instance method. 5163 // Returns 0 if no method is found. 5164 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5165 ObjCInterfaceDecl *CDecl); 5166 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5167 ObjCInterfaceDecl *ClassDecl); 5168 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5169 const ObjCObjectPointerType *OPT, 5170 bool IsInstance); 5171 5172 bool inferObjCARCLifetime(ValueDecl *decl); 5173 5174 ExprResult 5175 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5176 Expr *BaseExpr, 5177 SourceLocation OpLoc, 5178 DeclarationName MemberName, 5179 SourceLocation MemberLoc, 5180 SourceLocation SuperLoc, QualType SuperType, 5181 bool Super); 5182 5183 ExprResult 5184 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5185 IdentifierInfo &propertyName, 5186 SourceLocation receiverNameLoc, 5187 SourceLocation propertyNameLoc); 5188 5189 ObjCMethodDecl *tryCaptureObjCSelf(); 5190 5191 /// \brief Describes the kind of message expression indicated by a message 5192 /// send that starts with an identifier. 5193 enum ObjCMessageKind { 5194 /// \brief The message is sent to 'super'. 5195 ObjCSuperMessage, 5196 /// \brief The message is an instance message. 5197 ObjCInstanceMessage, 5198 /// \brief The message is a class message, and the identifier is a type 5199 /// name. 5200 ObjCClassMessage 5201 }; 5202 5203 ObjCMessageKind getObjCMessageKind(Scope *S, 5204 IdentifierInfo *Name, 5205 SourceLocation NameLoc, 5206 bool IsSuper, 5207 bool HasTrailingDot, 5208 ParsedType &ReceiverType); 5209 5210 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5211 Selector Sel, 5212 SourceLocation LBracLoc, 5213 SourceLocation SelectorLoc, 5214 SourceLocation RBracLoc, 5215 MultiExprArg Args); 5216 5217 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5218 QualType ReceiverType, 5219 SourceLocation SuperLoc, 5220 Selector Sel, 5221 ObjCMethodDecl *Method, 5222 SourceLocation LBracLoc, 5223 SourceLocation SelectorLoc, 5224 SourceLocation RBracLoc, 5225 MultiExprArg Args); 5226 5227 ExprResult ActOnClassMessage(Scope *S, 5228 ParsedType Receiver, 5229 Selector Sel, 5230 SourceLocation LBracLoc, 5231 SourceLocation SelectorLoc, 5232 SourceLocation RBracLoc, 5233 MultiExprArg Args); 5234 5235 ExprResult BuildInstanceMessage(Expr *Receiver, 5236 QualType ReceiverType, 5237 SourceLocation SuperLoc, 5238 Selector Sel, 5239 ObjCMethodDecl *Method, 5240 SourceLocation LBracLoc, 5241 SourceLocation SelectorLoc, 5242 SourceLocation RBracLoc, 5243 MultiExprArg Args); 5244 5245 ExprResult ActOnInstanceMessage(Scope *S, 5246 Expr *Receiver, 5247 Selector Sel, 5248 SourceLocation LBracLoc, 5249 SourceLocation SelectorLoc, 5250 SourceLocation RBracLoc, 5251 MultiExprArg Args); 5252 5253 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5254 ObjCBridgeCastKind Kind, 5255 SourceLocation BridgeKeywordLoc, 5256 TypeSourceInfo *TSInfo, 5257 Expr *SubExpr); 5258 5259 ExprResult ActOnObjCBridgedCast(Scope *S, 5260 SourceLocation LParenLoc, 5261 ObjCBridgeCastKind Kind, 5262 SourceLocation BridgeKeywordLoc, 5263 ParsedType Type, 5264 SourceLocation RParenLoc, 5265 Expr *SubExpr); 5266 5267 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5268 5269 /// \brief Check whether the given new method is a valid override of the 5270 /// given overridden method, and set any properties that should be inherited. 5271 /// 5272 /// \returns True if an error occurred. 5273 bool CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5274 const ObjCMethodDecl *Overridden, 5275 bool IsImplementation); 5276 5277 /// \brief Check whether the given method overrides any methods in its class, 5278 /// calling \c CheckObjCMethodOverride for each overridden method. 5279 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5280 5281 enum PragmaOptionsAlignKind { 5282 POAK_Native, // #pragma options align=native 5283 POAK_Natural, // #pragma options align=natural 5284 POAK_Packed, // #pragma options align=packed 5285 POAK_Power, // #pragma options align=power 5286 POAK_Mac68k, // #pragma options align=mac68k 5287 POAK_Reset // #pragma options align=reset 5288 }; 5289 5290 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5291 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5292 SourceLocation PragmaLoc, 5293 SourceLocation KindLoc); 5294 5295 enum PragmaPackKind { 5296 PPK_Default, // #pragma pack([n]) 5297 PPK_Show, // #pragma pack(show), only supported by MSVC. 5298 PPK_Push, // #pragma pack(push, [identifier], [n]) 5299 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5300 }; 5301 5302 enum PragmaMSStructKind { 5303 PMSST_OFF, // #pragms ms_struct off 5304 PMSST_ON // #pragms ms_struct on 5305 }; 5306 5307 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5308 void ActOnPragmaPack(PragmaPackKind Kind, 5309 IdentifierInfo *Name, 5310 Expr *Alignment, 5311 SourceLocation PragmaLoc, 5312 SourceLocation LParenLoc, 5313 SourceLocation RParenLoc); 5314 5315 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5316 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5317 5318 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5319 void ActOnPragmaUnused(const Token &Identifier, 5320 Scope *curScope, 5321 SourceLocation PragmaLoc); 5322 5323 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5324 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 5325 SourceLocation PragmaLoc); 5326 5327 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II, 5328 SourceLocation Loc); 5329 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5330 5331 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5332 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5333 SourceLocation PragmaLoc, 5334 SourceLocation WeakNameLoc); 5335 5336 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5337 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5338 IdentifierInfo* AliasName, 5339 SourceLocation PragmaLoc, 5340 SourceLocation WeakNameLoc, 5341 SourceLocation AliasNameLoc); 5342 5343 /// ActOnPragmaFPContract - Called on well formed 5344 /// #pragma {STDC,OPENCL} FP_CONTRACT 5345 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5346 5347 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5348 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5349 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5350 5351 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5352 void AddMsStructLayoutForRecord(RecordDecl *RD); 5353 5354 /// FreePackedContext - Deallocate and null out PackContext. 5355 void FreePackedContext(); 5356 5357 /// PushNamespaceVisibilityAttr - Note that we've entered a 5358 /// namespace with a visibility attribute. 5359 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 5360 5361 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5362 /// add an appropriate visibility attribute. 5363 void AddPushedVisibilityAttribute(Decl *RD); 5364 5365 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5366 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5367 void PopPragmaVisibility(); 5368 5369 /// FreeVisContext - Deallocate and null out VisContext. 5370 void FreeVisContext(); 5371 5372 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5373 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, Expr *E); 5374 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, TypeSourceInfo *T); 5375 5376 /// CastCategory - Get the correct forwarded implicit cast result category 5377 /// from the inner expression. 5378 ExprValueKind CastCategory(Expr *E); 5379 5380 /// \brief The kind of conversion being performed. 5381 enum CheckedConversionKind { 5382 /// \brief An implicit conversion. 5383 CCK_ImplicitConversion, 5384 /// \brief A C-style cast. 5385 CCK_CStyleCast, 5386 /// \brief A functional-style cast. 5387 CCK_FunctionalCast, 5388 /// \brief A cast other than a C-style cast. 5389 CCK_OtherCast 5390 }; 5391 5392 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5393 /// cast. If there is already an implicit cast, merge into the existing one. 5394 /// If isLvalue, the result of the cast is an lvalue. 5395 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5396 ExprValueKind VK = VK_RValue, 5397 const CXXCastPath *BasePath = 0, 5398 CheckedConversionKind CCK 5399 = CCK_ImplicitConversion); 5400 5401 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5402 /// to the conversion from scalar type ScalarTy to the Boolean type. 5403 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5404 5405 /// IgnoredValueConversions - Given that an expression's result is 5406 /// syntactically ignored, perform any conversions that are 5407 /// required. 5408 ExprResult IgnoredValueConversions(Expr *E); 5409 5410 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5411 // functions and arrays to their respective pointers (C99 6.3.2.1). 5412 ExprResult UsualUnaryConversions(Expr *E); 5413 5414 // DefaultFunctionArrayConversion - converts functions and arrays 5415 // to their respective pointers (C99 6.3.2.1). 5416 ExprResult DefaultFunctionArrayConversion(Expr *E); 5417 5418 // DefaultFunctionArrayLvalueConversion - converts functions and 5419 // arrays to their respective pointers and performs the 5420 // lvalue-to-rvalue conversion. 5421 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5422 5423 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5424 // the operand. This is DefaultFunctionArrayLvalueConversion, 5425 // except that it assumes the operand isn't of function or array 5426 // type. 5427 ExprResult DefaultLvalueConversion(Expr *E); 5428 5429 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5430 // do not have a prototype. Integer promotions are performed on each 5431 // argument, and arguments that have type float are promoted to double. 5432 ExprResult DefaultArgumentPromotion(Expr *E); 5433 5434 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5435 enum VariadicCallType { 5436 VariadicFunction, 5437 VariadicBlock, 5438 VariadicMethod, 5439 VariadicConstructor, 5440 VariadicDoesNotApply 5441 }; 5442 5443 /// GatherArgumentsForCall - Collector argument expressions for various 5444 /// form of call prototypes. 5445 bool GatherArgumentsForCall(SourceLocation CallLoc, 5446 FunctionDecl *FDecl, 5447 const FunctionProtoType *Proto, 5448 unsigned FirstProtoArg, 5449 Expr **Args, unsigned NumArgs, 5450 SmallVector<Expr *, 8> &AllArgs, 5451 VariadicCallType CallType = VariadicDoesNotApply); 5452 5453 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5454 // will warn if the resulting type is not a POD type. 5455 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5456 FunctionDecl *FDecl); 5457 5458 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5459 // operands and then handles various conversions that are common to binary 5460 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5461 // routine returns the first non-arithmetic type found. The client is 5462 // responsible for emitting appropriate error diagnostics. 5463 QualType UsualArithmeticConversions(ExprResult &lExpr, ExprResult &rExpr, 5464 bool isCompAssign = false); 5465 5466 /// AssignConvertType - All of the 'assignment' semantic checks return this 5467 /// enum to indicate whether the assignment was allowed. These checks are 5468 /// done for simple assignments, as well as initialization, return from 5469 /// function, argument passing, etc. The query is phrased in terms of a 5470 /// source and destination type. 5471 enum AssignConvertType { 5472 /// Compatible - the types are compatible according to the standard. 5473 Compatible, 5474 5475 /// PointerToInt - The assignment converts a pointer to an int, which we 5476 /// accept as an extension. 5477 PointerToInt, 5478 5479 /// IntToPointer - The assignment converts an int to a pointer, which we 5480 /// accept as an extension. 5481 IntToPointer, 5482 5483 /// FunctionVoidPointer - The assignment is between a function pointer and 5484 /// void*, which the standard doesn't allow, but we accept as an extension. 5485 FunctionVoidPointer, 5486 5487 /// IncompatiblePointer - The assignment is between two pointers types that 5488 /// are not compatible, but we accept them as an extension. 5489 IncompatiblePointer, 5490 5491 /// IncompatiblePointer - The assignment is between two pointers types which 5492 /// point to integers which have a different sign, but are otherwise identical. 5493 /// This is a subset of the above, but broken out because it's by far the most 5494 /// common case of incompatible pointers. 5495 IncompatiblePointerSign, 5496 5497 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5498 /// c/v/r qualifiers, which we accept as an extension. 5499 CompatiblePointerDiscardsQualifiers, 5500 5501 /// IncompatiblePointerDiscardsQualifiers - The assignment 5502 /// discards qualifiers that we don't permit to be discarded, 5503 /// like address spaces. 5504 IncompatiblePointerDiscardsQualifiers, 5505 5506 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5507 /// nested pointer types, and the qualifiers other than the first two 5508 /// levels differ e.g. char ** -> const char **, but we accept them as an 5509 /// extension. 5510 IncompatibleNestedPointerQualifiers, 5511 5512 /// IncompatibleVectors - The assignment is between two vector types that 5513 /// have the same size, which we accept as an extension. 5514 IncompatibleVectors, 5515 5516 /// IntToBlockPointer - The assignment converts an int to a block 5517 /// pointer. We disallow this. 5518 IntToBlockPointer, 5519 5520 /// IncompatibleBlockPointer - The assignment is between two block 5521 /// pointers types that are not compatible. 5522 IncompatibleBlockPointer, 5523 5524 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5525 /// id type and something else (that is incompatible with it). For example, 5526 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5527 IncompatibleObjCQualifiedId, 5528 5529 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 5530 /// object with __weak qualifier. 5531 IncompatibleObjCWeakRef, 5532 5533 /// Incompatible - We reject this conversion outright, it is invalid to 5534 /// represent it in the AST. 5535 Incompatible 5536 }; 5537 5538 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5539 /// assignment conversion type specified by ConvTy. This returns true if the 5540 /// conversion was invalid or false if the conversion was accepted. 5541 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5542 SourceLocation Loc, 5543 QualType DstType, QualType SrcType, 5544 Expr *SrcExpr, AssignmentAction Action, 5545 bool *Complained = 0); 5546 5547 /// CheckAssignmentConstraints - Perform type checking for assignment, 5548 /// argument passing, variable initialization, and function return values. 5549 /// C99 6.5.16. 5550 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5551 QualType lhs, QualType rhs); 5552 5553 /// Check assignment constraints and prepare for a conversion of the 5554 /// RHS to the LHS type. 5555 AssignConvertType CheckAssignmentConstraints(QualType lhs, ExprResult &rhs, 5556 CastKind &Kind); 5557 5558 // CheckSingleAssignmentConstraints - Currently used by 5559 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5560 // this routine performs the default function/array converions. 5561 AssignConvertType CheckSingleAssignmentConstraints(QualType lhs, 5562 ExprResult &rExprRes); 5563 5564 // \brief If the lhs type is a transparent union, check whether we 5565 // can initialize the transparent union with the given expression. 5566 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType lhs, 5567 ExprResult &rExpr); 5568 5569 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5570 5571 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5572 5573 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5574 AssignmentAction Action, 5575 bool AllowExplicit = false); 5576 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5577 AssignmentAction Action, 5578 bool AllowExplicit, 5579 ImplicitConversionSequence& ICS); 5580 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5581 const ImplicitConversionSequence& ICS, 5582 AssignmentAction Action, 5583 CheckedConversionKind CCK 5584 = CCK_ImplicitConversion); 5585 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5586 const StandardConversionSequence& SCS, 5587 AssignmentAction Action, 5588 CheckedConversionKind CCK); 5589 5590 /// the following "Check" methods will return a valid/converted QualType 5591 /// or a null QualType (indicating an error diagnostic was issued). 5592 5593 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5594 QualType InvalidOperands(SourceLocation l, ExprResult &lex, ExprResult &rex); 5595 QualType CheckPointerToMemberOperands( // C++ 5.5 5596 ExprResult &lex, ExprResult &rex, ExprValueKind &VK, 5597 SourceLocation OpLoc, bool isIndirect); 5598 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5599 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign, 5600 bool isDivide); 5601 QualType CheckRemainderOperands( // C99 6.5.5 5602 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 5603 QualType CheckAdditionOperands( // C99 6.5.6 5604 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 5605 QualType CheckSubtractionOperands( // C99 6.5.6 5606 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 5607 QualType CheckShiftOperands( // C99 6.5.7 5608 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 5609 bool isCompAssign = false); 5610 QualType CheckCompareOperands( // C99 6.5.8/9 5611 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 5612 bool isRelational); 5613 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 5614 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 5615 QualType CheckLogicalOperands( // C99 6.5.[13,14] 5616 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc); 5617 // CheckAssignmentOperands is used for both simple and compound assignment. 5618 // For simple assignment, pass both expressions and a null converted type. 5619 // For compound assignment, pass both expressions and the converted type. 5620 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 5621 Expr *lex, ExprResult &rex, SourceLocation OpLoc, QualType convertedType); 5622 5623 void ConvertPropertyForLValue(ExprResult &LHS, ExprResult &RHS, QualType& LHSTy); 5624 ExprResult ConvertPropertyForRValue(Expr *E); 5625 5626 QualType CheckConditionalOperands( // C99 6.5.15 5627 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5628 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5629 QualType CXXCheckConditionalOperands( // C++ 5.16 5630 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5631 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5632 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 5633 bool *NonStandardCompositeType = 0); 5634 QualType FindCompositePointerType(SourceLocation Loc, ExprResult &E1, ExprResult &E2, 5635 bool *NonStandardCompositeType = 0) { 5636 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 5637 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, NonStandardCompositeType); 5638 E1 = Owned(E1Tmp); 5639 E2 = Owned(E2Tmp); 5640 return Composite; 5641 } 5642 5643 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5644 SourceLocation questionLoc); 5645 5646 bool DiagnoseConditionalForNull(Expr *LHS, Expr *RHS, 5647 SourceLocation QuestionLoc); 5648 5649 /// type checking for vector binary operators. 5650 QualType CheckVectorOperands(ExprResult &lex, ExprResult &rex, 5651 SourceLocation Loc, bool isCompAssign); 5652 QualType CheckVectorCompareOperands(ExprResult &lex, ExprResult &rx, 5653 SourceLocation l, bool isRel); 5654 5655 /// type checking declaration initializers (C99 6.7.8) 5656 bool CheckInitList(const InitializedEntity &Entity, 5657 InitListExpr *&InitList, QualType &DeclType); 5658 bool CheckForConstantInitializer(Expr *e, QualType t); 5659 5660 // type checking C++ declaration initializers (C++ [dcl.init]). 5661 5662 /// ReferenceCompareResult - Expresses the result of comparing two 5663 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5664 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5665 enum ReferenceCompareResult { 5666 /// Ref_Incompatible - The two types are incompatible, so direct 5667 /// reference binding is not possible. 5668 Ref_Incompatible = 0, 5669 /// Ref_Related - The two types are reference-related, which means 5670 /// that their unqualified forms (T1 and T2) are either the same 5671 /// or T1 is a base class of T2. 5672 Ref_Related, 5673 /// Ref_Compatible_With_Added_Qualification - The two types are 5674 /// reference-compatible with added qualification, meaning that 5675 /// they are reference-compatible and the qualifiers on T1 (cv1) 5676 /// are greater than the qualifiers on T2 (cv2). 5677 Ref_Compatible_With_Added_Qualification, 5678 /// Ref_Compatible - The two types are reference-compatible and 5679 /// have equivalent qualifiers (cv1 == cv2). 5680 Ref_Compatible 5681 }; 5682 5683 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 5684 QualType T1, QualType T2, 5685 bool &DerivedToBase, 5686 bool &ObjCConversion, 5687 bool &ObjCLifetimeConversion); 5688 5689 /// CheckCastTypes - Check type constraints for casting between types under 5690 /// C semantics, or forward to CXXCheckCStyleCast in C++. 5691 ExprResult CheckCastTypes(SourceLocation CastStartLoc, SourceRange TyRange, 5692 QualType CastTy, Expr *CastExpr, CastKind &Kind, 5693 ExprValueKind &VK, CXXCastPath &BasePath, 5694 bool FunctionalStyle = false); 5695 5696 ExprResult checkUnknownAnyCast(SourceRange TyRange, QualType castType, 5697 Expr *castExpr, CastKind &castKind, 5698 ExprValueKind &valueKind, CXXCastPath &BasePath); 5699 5700 // CheckVectorCast - check type constraints for vectors. 5701 // Since vectors are an extension, there are no C standard reference for this. 5702 // We allow casting between vectors and integer datatypes of the same size. 5703 // returns true if the cast is invalid 5704 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 5705 CastKind &Kind); 5706 5707 // CheckExtVectorCast - check type constraints for extended vectors. 5708 // Since vectors are an extension, there are no C standard reference for this. 5709 // We allow casting between vectors and integer datatypes of the same size, 5710 // or vectors and the element type of that vector. 5711 // returns the cast expr 5712 ExprResult CheckExtVectorCast(SourceRange R, QualType VectorTy, Expr *CastExpr, 5713 CastKind &Kind); 5714 5715 /// CXXCheckCStyleCast - Check constraints of a C-style or function-style 5716 /// cast under C++ semantics. 5717 ExprResult CXXCheckCStyleCast(SourceRange R, QualType CastTy, ExprValueKind &VK, 5718 Expr *CastExpr, CastKind &Kind, 5719 CXXCastPath &BasePath, bool FunctionalStyle); 5720 5721 /// \brief Checks for valid expressions which can be cast to an ObjC 5722 /// pointer without needing a bridge cast. 5723 bool ValidObjCARCNoBridgeCastExpr(Expr *&Exp, QualType castType); 5724 5725 /// \brief Checks for invalid conversions and casts between 5726 /// retainable pointers and other pointer kinds. 5727 void CheckObjCARCConversion(SourceRange castRange, QualType castType, 5728 Expr *&op, CheckedConversionKind CCK); 5729 5730 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 5731 QualType ExprType); 5732 5733 /// checkRetainCycles - Check whether an Objective-C message send 5734 /// might create an obvious retain cycle. 5735 void checkRetainCycles(ObjCMessageExpr *msg); 5736 void checkRetainCycles(Expr *receiver, Expr *argument); 5737 5738 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 5739 /// to weak/__unsafe_unretained type. 5740 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 5741 5742 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 5743 /// to weak/__unsafe_unretained expression. 5744 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 5745 5746 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 5747 /// \param Method - May be null. 5748 /// \param [out] ReturnType - The return type of the send. 5749 /// \return true iff there were any incompatible types. 5750 bool CheckMessageArgumentTypes(QualType ReceiverType, 5751 Expr **Args, unsigned NumArgs, Selector Sel, 5752 ObjCMethodDecl *Method, bool isClassMessage, 5753 bool isSuperMessage, 5754 SourceLocation lbrac, SourceLocation rbrac, 5755 QualType &ReturnType, ExprValueKind &VK); 5756 5757 /// \brief Determine the result of a message send expression based on 5758 /// the type of the receiver, the method expected to receive the message, 5759 /// and the form of the message send. 5760 QualType getMessageSendResultType(QualType ReceiverType, 5761 ObjCMethodDecl *Method, 5762 bool isClassMessage, bool isSuperMessage); 5763 5764 /// \brief If the given expression involves a message send to a method 5765 /// with a related result type, emit a note describing what happened. 5766 void EmitRelatedResultTypeNote(const Expr *E); 5767 5768 /// CheckBooleanCondition - Diagnose problems involving the use of 5769 /// the given expression as a boolean condition (e.g. in an if 5770 /// statement). Also performs the standard function and array 5771 /// decays, possibly changing the input variable. 5772 /// 5773 /// \param Loc - A location associated with the condition, e.g. the 5774 /// 'if' keyword. 5775 /// \return true iff there were any errors 5776 ExprResult CheckBooleanCondition(Expr *CondExpr, SourceLocation Loc); 5777 5778 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 5779 Expr *SubExpr); 5780 5781 /// DiagnoseAssignmentAsCondition - Given that an expression is 5782 /// being used as a boolean condition, warn if it's an assignment. 5783 void DiagnoseAssignmentAsCondition(Expr *E); 5784 5785 /// \brief Redundant parentheses over an equality comparison can indicate 5786 /// that the user intended an assignment used as condition. 5787 void DiagnoseEqualityWithExtraParens(ParenExpr *parenE); 5788 5789 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 5790 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 5791 5792 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 5793 /// the specified width and sign. If an overflow occurs, detect it and emit 5794 /// the specified diagnostic. 5795 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 5796 unsigned NewWidth, bool NewSign, 5797 SourceLocation Loc, unsigned DiagID); 5798 5799 /// Checks that the Objective-C declaration is declared in the global scope. 5800 /// Emits an error and marks the declaration as invalid if it's not declared 5801 /// in the global scope. 5802 bool CheckObjCDeclScope(Decl *D); 5803 5804 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 5805 /// and reports the appropriate diagnostics. Returns false on success. 5806 /// Can optionally return the value of the expression. 5807 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 5808 5809 /// VerifyBitField - verifies that a bit field expression is an ICE and has 5810 /// the correct width, and that the field type is valid. 5811 /// Returns false on success. 5812 /// Can optionally return whether the bit-field is of width 0 5813 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 5814 QualType FieldTy, const Expr *BitWidth, 5815 bool *ZeroWidth = 0); 5816 5817 /// \name Code completion 5818 //@{ 5819 /// \brief Describes the context in which code completion occurs. 5820 enum ParserCompletionContext { 5821 /// \brief Code completion occurs at top-level or namespace context. 5822 PCC_Namespace, 5823 /// \brief Code completion occurs within a class, struct, or union. 5824 PCC_Class, 5825 /// \brief Code completion occurs within an Objective-C interface, protocol, 5826 /// or category. 5827 PCC_ObjCInterface, 5828 /// \brief Code completion occurs within an Objective-C implementation or 5829 /// category implementation 5830 PCC_ObjCImplementation, 5831 /// \brief Code completion occurs within the list of instance variables 5832 /// in an Objective-C interface, protocol, category, or implementation. 5833 PCC_ObjCInstanceVariableList, 5834 /// \brief Code completion occurs following one or more template 5835 /// headers. 5836 PCC_Template, 5837 /// \brief Code completion occurs following one or more template 5838 /// headers within a class. 5839 PCC_MemberTemplate, 5840 /// \brief Code completion occurs within an expression. 5841 PCC_Expression, 5842 /// \brief Code completion occurs within a statement, which may 5843 /// also be an expression or a declaration. 5844 PCC_Statement, 5845 /// \brief Code completion occurs at the beginning of the 5846 /// initialization statement (or expression) in a for loop. 5847 PCC_ForInit, 5848 /// \brief Code completion occurs within the condition of an if, 5849 /// while, switch, or for statement. 5850 PCC_Condition, 5851 /// \brief Code completion occurs within the body of a function on a 5852 /// recovery path, where we do not have a specific handle on our position 5853 /// in the grammar. 5854 PCC_RecoveryInFunction, 5855 /// \brief Code completion occurs where only a type is permitted. 5856 PCC_Type, 5857 /// \brief Code completion occurs in a parenthesized expression, which 5858 /// might also be a type cast. 5859 PCC_ParenthesizedExpression, 5860 /// \brief Code completion occurs within a sequence of declaration 5861 /// specifiers within a function, method, or block. 5862 PCC_LocalDeclarationSpecifiers 5863 }; 5864 5865 void CodeCompleteOrdinaryName(Scope *S, 5866 ParserCompletionContext CompletionContext); 5867 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 5868 bool AllowNonIdentifiers, 5869 bool AllowNestedNameSpecifiers); 5870 5871 struct CodeCompleteExpressionData; 5872 void CodeCompleteExpression(Scope *S, 5873 const CodeCompleteExpressionData &Data); 5874 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 5875 SourceLocation OpLoc, 5876 bool IsArrow); 5877 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 5878 void CodeCompleteTag(Scope *S, unsigned TagSpec); 5879 void CodeCompleteTypeQualifiers(DeclSpec &DS); 5880 void CodeCompleteCase(Scope *S); 5881 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 5882 void CodeCompleteInitializer(Scope *S, Decl *D); 5883 void CodeCompleteReturn(Scope *S); 5884 void CodeCompleteAfterIf(Scope *S); 5885 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 5886 5887 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 5888 bool EnteringContext); 5889 void CodeCompleteUsing(Scope *S); 5890 void CodeCompleteUsingDirective(Scope *S); 5891 void CodeCompleteNamespaceDecl(Scope *S); 5892 void CodeCompleteNamespaceAliasDecl(Scope *S); 5893 void CodeCompleteOperatorName(Scope *S); 5894 void CodeCompleteConstructorInitializer(Decl *Constructor, 5895 CXXCtorInitializer** Initializers, 5896 unsigned NumInitializers); 5897 5898 void CodeCompleteObjCAtDirective(Scope *S); 5899 void CodeCompleteObjCAtVisibility(Scope *S); 5900 void CodeCompleteObjCAtStatement(Scope *S); 5901 void CodeCompleteObjCAtExpression(Scope *S); 5902 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 5903 void CodeCompleteObjCPropertyGetter(Scope *S); 5904 void CodeCompleteObjCPropertySetter(Scope *S); 5905 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 5906 bool IsParameter); 5907 void CodeCompleteObjCMessageReceiver(Scope *S); 5908 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 5909 IdentifierInfo **SelIdents, 5910 unsigned NumSelIdents, 5911 bool AtArgumentExpression); 5912 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 5913 IdentifierInfo **SelIdents, 5914 unsigned NumSelIdents, 5915 bool AtArgumentExpression, 5916 bool IsSuper = false); 5917 void CodeCompleteObjCInstanceMessage(Scope *S, ExprTy *Receiver, 5918 IdentifierInfo **SelIdents, 5919 unsigned NumSelIdents, 5920 bool AtArgumentExpression, 5921 ObjCInterfaceDecl *Super = 0); 5922 void CodeCompleteObjCForCollection(Scope *S, 5923 DeclGroupPtrTy IterationVar); 5924 void CodeCompleteObjCSelector(Scope *S, 5925 IdentifierInfo **SelIdents, 5926 unsigned NumSelIdents); 5927 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 5928 unsigned NumProtocols); 5929 void CodeCompleteObjCProtocolDecl(Scope *S); 5930 void CodeCompleteObjCInterfaceDecl(Scope *S); 5931 void CodeCompleteObjCSuperclass(Scope *S, 5932 IdentifierInfo *ClassName, 5933 SourceLocation ClassNameLoc); 5934 void CodeCompleteObjCImplementationDecl(Scope *S); 5935 void CodeCompleteObjCInterfaceCategory(Scope *S, 5936 IdentifierInfo *ClassName, 5937 SourceLocation ClassNameLoc); 5938 void CodeCompleteObjCImplementationCategory(Scope *S, 5939 IdentifierInfo *ClassName, 5940 SourceLocation ClassNameLoc); 5941 void CodeCompleteObjCPropertyDefinition(Scope *S); 5942 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 5943 IdentifierInfo *PropertyName); 5944 void CodeCompleteObjCMethodDecl(Scope *S, 5945 bool IsInstanceMethod, 5946 ParsedType ReturnType); 5947 void CodeCompleteObjCMethodDeclSelector(Scope *S, 5948 bool IsInstanceMethod, 5949 bool AtParameterName, 5950 ParsedType ReturnType, 5951 IdentifierInfo **SelIdents, 5952 unsigned NumSelIdents); 5953 void CodeCompletePreprocessorDirective(bool InConditional); 5954 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 5955 void CodeCompletePreprocessorMacroName(bool IsDefinition); 5956 void CodeCompletePreprocessorExpression(); 5957 void CodeCompletePreprocessorMacroArgument(Scope *S, 5958 IdentifierInfo *Macro, 5959 MacroInfo *MacroInfo, 5960 unsigned Argument); 5961 void CodeCompleteNaturalLanguage(); 5962 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 5963 SmallVectorImpl<CodeCompletionResult> &Results); 5964 //@} 5965 5966 //===--------------------------------------------------------------------===// 5967 // Extra semantic analysis beyond the C type system 5968 5969public: 5970 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 5971 unsigned ByteNo) const; 5972 5973private: 5974 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr, 5975 bool isSubscript=false, bool AllowOnePastEnd=true); 5976 void CheckArrayAccess(const Expr *E); 5977 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 5978 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 5979 5980 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 5981 bool CheckObjCString(Expr *Arg); 5982 5983 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5984 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5985 5986 bool SemaBuiltinVAStart(CallExpr *TheCall); 5987 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 5988 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 5989 5990public: 5991 // Used by C++ template instantiation. 5992 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 5993 5994private: 5995 bool SemaBuiltinPrefetch(CallExpr *TheCall); 5996 bool SemaBuiltinObjectSize(CallExpr *TheCall); 5997 bool SemaBuiltinLongjmp(CallExpr *TheCall); 5998 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 5999 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 6000 llvm::APSInt &Result); 6001 6002 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 6003 bool HasVAListArg, unsigned format_idx, 6004 unsigned firstDataArg, bool isPrintf); 6005 6006 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 6007 const CallExpr *TheCall, bool HasVAListArg, 6008 unsigned format_idx, unsigned firstDataArg, 6009 bool isPrintf); 6010 6011 void CheckNonNullArguments(const NonNullAttr *NonNull, 6012 const Expr * const *ExprArgs, 6013 SourceLocation CallSiteLoc); 6014 6015 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 6016 unsigned format_idx, unsigned firstDataArg, 6017 bool isPrintf); 6018 6019 /// \brief Enumeration used to describe which of the memory setting or copying 6020 /// functions is being checked by \c CheckMemaccessArguments(). 6021 enum CheckedMemoryFunction { 6022 CMF_Memset, 6023 CMF_Memcpy, 6024 CMF_Memmove, 6025 CMF_Memcmp 6026 }; 6027 6028 void CheckMemaccessArguments(const CallExpr *Call, CheckedMemoryFunction CMF, 6029 IdentifierInfo *FnName); 6030 6031 void CheckStrlcpycatArguments(const CallExpr *Call, 6032 IdentifierInfo *FnName); 6033 6034 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 6035 SourceLocation ReturnLoc); 6036 void CheckFloatComparison(SourceLocation loc, Expr* lex, Expr* rex); 6037 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 6038 6039 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 6040 Expr *Init); 6041 6042 /// \brief The parser's current scope. 6043 /// 6044 /// The parser maintains this state here. 6045 Scope *CurScope; 6046 6047protected: 6048 friend class Parser; 6049 friend class InitializationSequence; 6050 friend class ASTReader; 6051 friend class ASTWriter; 6052 6053public: 6054 /// \brief Retrieve the parser's current scope. 6055 /// 6056 /// This routine must only be used when it is certain that semantic analysis 6057 /// and the parser are in precisely the same context, which is not the case 6058 /// when, e.g., we are performing any kind of template instantiation. 6059 /// Therefore, the only safe places to use this scope are in the parser 6060 /// itself and in routines directly invoked from the parser and *never* from 6061 /// template substitution or instantiation. 6062 Scope *getCurScope() const { return CurScope; } 6063 6064 Decl *getObjCDeclContext() const; 6065}; 6066 6067/// \brief RAII object that enters a new expression evaluation context. 6068class EnterExpressionEvaluationContext { 6069 Sema &Actions; 6070 6071public: 6072 EnterExpressionEvaluationContext(Sema &Actions, 6073 Sema::ExpressionEvaluationContext NewContext) 6074 : Actions(Actions) { 6075 Actions.PushExpressionEvaluationContext(NewContext); 6076 } 6077 6078 ~EnterExpressionEvaluationContext() { 6079 Actions.PopExpressionEvaluationContext(); 6080 } 6081}; 6082 6083} // end namespace clang 6084 6085#endif 6086