Sema.h revision 147545d698972cfd34ece30a5d55e8180784161e
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/MultiInitializer.h" 26#include "clang/Sema/TypoCorrection.h" 27#include "clang/Sema/Weak.h" 28#include "clang/AST/Expr.h" 29#include "clang/AST/DeclarationName.h" 30#include "clang/AST/ExternalASTSource.h" 31#include "clang/AST/TypeLoc.h" 32#include "clang/Basic/Specifiers.h" 33#include "clang/Basic/TemplateKinds.h" 34#include "clang/Basic/TypeTraits.h" 35#include "clang/Basic/ExpressionTraits.h" 36#include "llvm/ADT/ArrayRef.h" 37#include "llvm/ADT/OwningPtr.h" 38#include "llvm/ADT/SmallPtrSet.h" 39#include "llvm/ADT/SmallVector.h" 40#include <deque> 41#include <string> 42 43namespace llvm { 44 class APSInt; 45 template <typename ValueT> struct DenseMapInfo; 46 template <typename ValueT, typename ValueInfoT> class DenseSet; 47} 48 49namespace clang { 50 class ADLResult; 51 class ASTConsumer; 52 class ASTContext; 53 class ASTMutationListener; 54 class ASTReader; 55 class ASTWriter; 56 class ArrayType; 57 class AttributeList; 58 class BlockDecl; 59 class CXXBasePath; 60 class CXXBasePaths; 61 typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 62 class CXXConstructorDecl; 63 class CXXConversionDecl; 64 class CXXDestructorDecl; 65 class CXXFieldCollector; 66 class CXXMemberCallExpr; 67 class CXXMethodDecl; 68 class CXXScopeSpec; 69 class CXXTemporary; 70 class CXXTryStmt; 71 class CallExpr; 72 class ClassTemplateDecl; 73 class ClassTemplatePartialSpecializationDecl; 74 class ClassTemplateSpecializationDecl; 75 class CodeCompleteConsumer; 76 class CodeCompletionAllocator; 77 class CodeCompletionResult; 78 class Decl; 79 class DeclAccessPair; 80 class DeclContext; 81 class DeclRefExpr; 82 class DeclaratorDecl; 83 class DeducedTemplateArgument; 84 class DependentDiagnostic; 85 class DesignatedInitExpr; 86 class Designation; 87 class EnumConstantDecl; 88 class Expr; 89 class ExtVectorType; 90 class ExternalSemaSource; 91 class FormatAttr; 92 class FriendDecl; 93 class FunctionDecl; 94 class FunctionProtoType; 95 class FunctionTemplateDecl; 96 class ImplicitConversionSequence; 97 class InitListExpr; 98 class InitializationKind; 99 class InitializationSequence; 100 class InitializedEntity; 101 class IntegerLiteral; 102 class LabelStmt; 103 class LangOptions; 104 class LocalInstantiationScope; 105 class LookupResult; 106 class MacroInfo; 107 class MultiLevelTemplateArgumentList; 108 class NamedDecl; 109 class NonNullAttr; 110 class ObjCCategoryDecl; 111 class ObjCCategoryImplDecl; 112 class ObjCCompatibleAliasDecl; 113 class ObjCContainerDecl; 114 class ObjCImplDecl; 115 class ObjCImplementationDecl; 116 class ObjCInterfaceDecl; 117 class ObjCIvarDecl; 118 template <class T> class ObjCList; 119 class ObjCMessageExpr; 120 class ObjCMethodDecl; 121 class ObjCPropertyDecl; 122 class ObjCProtocolDecl; 123 class OverloadCandidateSet; 124 class OverloadExpr; 125 class ParenListExpr; 126 class ParmVarDecl; 127 class Preprocessor; 128 class PseudoDestructorTypeStorage; 129 class QualType; 130 class StandardConversionSequence; 131 class Stmt; 132 class StringLiteral; 133 class SwitchStmt; 134 class TargetAttributesSema; 135 class TemplateArgument; 136 class TemplateArgumentList; 137 class TemplateArgumentLoc; 138 class TemplateDecl; 139 class TemplateParameterList; 140 class TemplatePartialOrderingContext; 141 class TemplateTemplateParmDecl; 142 class Token; 143 class TypeAliasDecl; 144 class TypedefDecl; 145 class TypedefNameDecl; 146 class TypeLoc; 147 class UnqualifiedId; 148 class UnresolvedLookupExpr; 149 class UnresolvedMemberExpr; 150 class UnresolvedSetImpl; 151 class UnresolvedSetIterator; 152 class UsingDecl; 153 class UsingShadowDecl; 154 class ValueDecl; 155 class VarDecl; 156 class VisibilityAttr; 157 class VisibleDeclConsumer; 158 class IndirectFieldDecl; 159 160namespace sema { 161 class AccessedEntity; 162 class BlockScopeInfo; 163 class DelayedDiagnostic; 164 class FunctionScopeInfo; 165 class TemplateDeductionInfo; 166} 167 168// FIXME: No way to easily map from TemplateTypeParmTypes to 169// TemplateTypeParmDecls, so we have this horrible PointerUnion. 170typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 171 SourceLocation> UnexpandedParameterPack; 172 173/// Sema - This implements semantic analysis and AST building for C. 174class Sema { 175 Sema(const Sema&); // DO NOT IMPLEMENT 176 void operator=(const Sema&); // DO NOT IMPLEMENT 177 mutable const TargetAttributesSema* TheTargetAttributesSema; 178public: 179 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 180 typedef OpaquePtr<TemplateName> TemplateTy; 181 typedef OpaquePtr<QualType> TypeTy; 182 183 OpenCLOptions OpenCLFeatures; 184 FPOptions FPFeatures; 185 186 const LangOptions &LangOpts; 187 Preprocessor &PP; 188 ASTContext &Context; 189 ASTConsumer &Consumer; 190 DiagnosticsEngine &Diags; 191 SourceManager &SourceMgr; 192 193 /// \brief Flag indicating whether or not to collect detailed statistics. 194 bool CollectStats; 195 196 /// \brief Source of additional semantic information. 197 ExternalSemaSource *ExternalSource; 198 199 /// \brief Code-completion consumer. 200 CodeCompleteConsumer *CodeCompleter; 201 202 /// CurContext - This is the current declaration context of parsing. 203 DeclContext *CurContext; 204 205 /// \brief Generally null except when we temporarily switch decl contexts, 206 /// like in \see ActOnObjCTemporaryExitContainerContext. 207 DeclContext *OriginalLexicalContext; 208 209 /// VAListTagName - The declaration name corresponding to __va_list_tag. 210 /// This is used as part of a hack to omit that class from ADL results. 211 DeclarationName VAListTagName; 212 213 /// PackContext - Manages the stack for #pragma pack. An alignment 214 /// of 0 indicates default alignment. 215 void *PackContext; // Really a "PragmaPackStack*" 216 217 bool MSStructPragmaOn; // True when #pragma ms_struct on 218 219 /// VisContext - Manages the stack for #pragma GCC visibility. 220 void *VisContext; // Really a "PragmaVisStack*" 221 222 /// ExprNeedsCleanups - True if the current evaluation context 223 /// requires cleanups to be run at its conclusion. 224 bool ExprNeedsCleanups; 225 226 /// \brief Stack containing information about each of the nested 227 /// function, block, and method scopes that are currently active. 228 /// 229 /// This array is never empty. Clients should ignore the first 230 /// element, which is used to cache a single FunctionScopeInfo 231 /// that's used to parse every top-level function. 232 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 233 234 /// ExprTemporaries - This is the stack of temporaries that are created by 235 /// the current full expression. 236 SmallVector<CXXTemporary*, 8> ExprTemporaries; 237 238 typedef LazyVector<TypedefNameDecl *, ExternalSemaSource, 239 &ExternalSemaSource::ReadExtVectorDecls, 2, 2> 240 ExtVectorDeclsType; 241 242 /// ExtVectorDecls - This is a list all the extended vector types. This allows 243 /// us to associate a raw vector type with one of the ext_vector type names. 244 /// This is only necessary for issuing pretty diagnostics. 245 ExtVectorDeclsType ExtVectorDecls; 246 247 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 248 llvm::OwningPtr<CXXFieldCollector> FieldCollector; 249 250 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 251 252 /// PureVirtualClassDiagSet - a set of class declarations which we have 253 /// emitted a list of pure virtual functions. Used to prevent emitting the 254 /// same list more than once. 255 llvm::OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 256 257 /// ParsingInitForAutoVars - a set of declarations with auto types for which 258 /// we are currently parsing the initializer. 259 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 260 261 /// \brief A mapping from external names to the most recent 262 /// locally-scoped external declaration with that name. 263 /// 264 /// This map contains external declarations introduced in local 265 /// scoped, e.g., 266 /// 267 /// \code 268 /// void f() { 269 /// void foo(int, int); 270 /// } 271 /// \endcode 272 /// 273 /// Here, the name "foo" will be associated with the declaration on 274 /// "foo" within f. This name is not visible outside of 275 /// "f". However, we still find it in two cases: 276 /// 277 /// - If we are declaring another external with the name "foo", we 278 /// can find "foo" as a previous declaration, so that the types 279 /// of this external declaration can be checked for 280 /// compatibility. 281 /// 282 /// - If we would implicitly declare "foo" (e.g., due to a call to 283 /// "foo" in C when no prototype or definition is visible), then 284 /// we find this declaration of "foo" and complain that it is 285 /// not visible. 286 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 287 288 /// \brief Look for a locally scoped external declaration by the given name. 289 llvm::DenseMap<DeclarationName, NamedDecl *>::iterator 290 findLocallyScopedExternalDecl(DeclarationName Name); 291 292 typedef LazyVector<VarDecl *, ExternalSemaSource, 293 &ExternalSemaSource::ReadTentativeDefinitions, 2, 2> 294 TentativeDefinitionsType; 295 296 /// \brief All the tentative definitions encountered in the TU. 297 TentativeDefinitionsType TentativeDefinitions; 298 299 typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource, 300 &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2> 301 UnusedFileScopedDeclsType; 302 303 /// \brief The set of file scoped decls seen so far that have not been used 304 /// and must warn if not used. Only contains the first declaration. 305 UnusedFileScopedDeclsType UnusedFileScopedDecls; 306 307 typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource, 308 &ExternalSemaSource::ReadDelegatingConstructors, 2, 2> 309 DelegatingCtorDeclsType; 310 311 /// \brief All the delegating constructors seen so far in the file, used for 312 /// cycle detection at the end of the TU. 313 DelegatingCtorDeclsType DelegatingCtorDecls; 314 315 /// \brief All the overriding destructors seen during a class definition 316 /// (there could be multiple due to nested classes) that had their exception 317 /// spec checks delayed, plus the overridden destructor. 318 SmallVector<std::pair<const CXXDestructorDecl*, 319 const CXXDestructorDecl*>, 2> 320 DelayedDestructorExceptionSpecChecks; 321 322 /// \brief Callback to the parser to parse templated functions when needed. 323 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 324 LateTemplateParserCB *LateTemplateParser; 325 void *OpaqueParser; 326 327 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 328 LateTemplateParser = LTP; 329 OpaqueParser = P; 330 } 331 332 class DelayedDiagnostics; 333 334 class ParsingDeclState { 335 unsigned SavedStackSize; 336 friend class Sema::DelayedDiagnostics; 337 }; 338 339 class ProcessingContextState { 340 unsigned SavedParsingDepth; 341 unsigned SavedActiveStackBase; 342 friend class Sema::DelayedDiagnostics; 343 }; 344 345 /// A class which encapsulates the logic for delaying diagnostics 346 /// during parsing and other processing. 347 class DelayedDiagnostics { 348 /// \brief The stack of diagnostics that were delayed due to being 349 /// produced during the parsing of a declaration. 350 sema::DelayedDiagnostic *Stack; 351 352 /// \brief The number of objects on the delayed-diagnostics stack. 353 unsigned StackSize; 354 355 /// \brief The current capacity of the delayed-diagnostics stack. 356 unsigned StackCapacity; 357 358 /// \brief The index of the first "active" delayed diagnostic in 359 /// the stack. When parsing class definitions, we ignore active 360 /// delayed diagnostics from the surrounding context. 361 unsigned ActiveStackBase; 362 363 /// \brief The depth of the declarations we're currently parsing. 364 /// This gets saved and reset whenever we enter a class definition. 365 unsigned ParsingDepth; 366 367 public: 368 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 369 ActiveStackBase(0), ParsingDepth(0) {} 370 371 ~DelayedDiagnostics() { 372 delete[] reinterpret_cast<char*>(Stack); 373 } 374 375 /// Adds a delayed diagnostic. 376 void add(const sema::DelayedDiagnostic &diag); 377 378 /// Determines whether diagnostics should be delayed. 379 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 380 381 /// Observe that we've started parsing a declaration. Access and 382 /// deprecation diagnostics will be delayed; when the declaration 383 /// is completed, all active delayed diagnostics will be evaluated 384 /// in its context, and then active diagnostics stack will be 385 /// popped down to the saved depth. 386 ParsingDeclState pushParsingDecl() { 387 ParsingDepth++; 388 389 ParsingDeclState state; 390 state.SavedStackSize = StackSize; 391 return state; 392 } 393 394 /// Observe that we're completed parsing a declaration. 395 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 396 397 /// Observe that we've started processing a different context, the 398 /// contents of which are semantically separate from the 399 /// declarations it may lexically appear in. This sets aside the 400 /// current stack of active diagnostics and starts afresh. 401 ProcessingContextState pushContext() { 402 assert(StackSize >= ActiveStackBase); 403 404 ProcessingContextState state; 405 state.SavedParsingDepth = ParsingDepth; 406 state.SavedActiveStackBase = ActiveStackBase; 407 408 ActiveStackBase = StackSize; 409 ParsingDepth = 0; 410 411 return state; 412 } 413 414 /// Observe that we've stopped processing a context. This 415 /// restores the previous stack of active diagnostics. 416 void popContext(ProcessingContextState state) { 417 assert(ActiveStackBase == StackSize); 418 assert(ParsingDepth == 0); 419 ActiveStackBase = state.SavedActiveStackBase; 420 ParsingDepth = state.SavedParsingDepth; 421 } 422 } DelayedDiagnostics; 423 424 /// A RAII object to temporarily push a declaration context. 425 class ContextRAII { 426 private: 427 Sema &S; 428 DeclContext *SavedContext; 429 ProcessingContextState SavedContextState; 430 431 public: 432 ContextRAII(Sema &S, DeclContext *ContextToPush) 433 : S(S), SavedContext(S.CurContext), 434 SavedContextState(S.DelayedDiagnostics.pushContext()) 435 { 436 assert(ContextToPush && "pushing null context"); 437 S.CurContext = ContextToPush; 438 } 439 440 void pop() { 441 if (!SavedContext) return; 442 S.CurContext = SavedContext; 443 S.DelayedDiagnostics.popContext(SavedContextState); 444 SavedContext = 0; 445 } 446 447 ~ContextRAII() { 448 pop(); 449 } 450 }; 451 452 /// WeakUndeclaredIdentifiers - Identifiers contained in 453 /// #pragma weak before declared. rare. may alias another 454 /// identifier, declared or undeclared 455 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 456 457 /// \brief Load weak undeclared identifiers from the external source. 458 void LoadExternalWeakUndeclaredIdentifiers(); 459 460 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 461 /// #pragma weak during processing of other Decls. 462 /// I couldn't figure out a clean way to generate these in-line, so 463 /// we store them here and handle separately -- which is a hack. 464 /// It would be best to refactor this. 465 SmallVector<Decl*,2> WeakTopLevelDecl; 466 467 IdentifierResolver IdResolver; 468 469 /// Translation Unit Scope - useful to Objective-C actions that need 470 /// to lookup file scope declarations in the "ordinary" C decl namespace. 471 /// For example, user-defined classes, built-in "id" type, etc. 472 Scope *TUScope; 473 474 /// \brief The C++ "std" namespace, where the standard library resides. 475 LazyDeclPtr StdNamespace; 476 477 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 478 /// standard library. 479 LazyDeclPtr StdBadAlloc; 480 481 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 482 RecordDecl *CXXTypeInfoDecl; 483 484 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 485 RecordDecl *MSVCGuidDecl; 486 487 /// A flag to remember whether the implicit forms of operator new and delete 488 /// have been declared. 489 bool GlobalNewDeleteDeclared; 490 491 492 /// A flag that is set when parsing a -dealloc method and no [super dealloc] 493 /// call was found yet. 494 bool ObjCShouldCallSuperDealloc; 495 /// A flag that is set when parsing a -finalize method and no [super finalize] 496 /// call was found yet. 497 bool ObjCShouldCallSuperFinalize; 498 499 /// \brief The set of declarations that have been referenced within 500 /// a potentially evaluated expression. 501 typedef SmallVector<std::pair<SourceLocation, Decl *>, 10> 502 PotentiallyReferencedDecls; 503 504 /// \brief A set of diagnostics that may be emitted. 505 typedef SmallVector<std::pair<SourceLocation, PartialDiagnostic>, 10> 506 PotentiallyEmittedDiagnostics; 507 508 /// \brief Describes how the expressions currently being parsed are 509 /// evaluated at run-time, if at all. 510 enum ExpressionEvaluationContext { 511 /// \brief The current expression and its subexpressions occur within an 512 /// unevaluated operand (C++0x [expr]p8), such as a constant expression 513 /// or the subexpression of \c sizeof, where the type or the value of the 514 /// expression may be significant but no code will be generated to evaluate 515 /// the value of the expression at run time. 516 Unevaluated, 517 518 /// \brief The current expression is potentially evaluated at run time, 519 /// which means that code may be generated to evaluate the value of the 520 /// expression at run time. 521 PotentiallyEvaluated, 522 523 /// \brief The current expression may be potentially evaluated or it may 524 /// be unevaluated, but it is impossible to tell from the lexical context. 525 /// This evaluation context is used primary for the operand of the C++ 526 /// \c typeid expression, whose argument is potentially evaluated only when 527 /// it is an lvalue of polymorphic class type (C++ [basic.def.odr]p2). 528 PotentiallyPotentiallyEvaluated, 529 530 /// \brief The current expression is potentially evaluated, but any 531 /// declarations referenced inside that expression are only used if 532 /// in fact the current expression is used. 533 /// 534 /// This value is used when parsing default function arguments, for which 535 /// we would like to provide diagnostics (e.g., passing non-POD arguments 536 /// through varargs) but do not want to mark declarations as "referenced" 537 /// until the default argument is used. 538 PotentiallyEvaluatedIfUsed 539 }; 540 541 /// \brief Data structure used to record current or nested 542 /// expression evaluation contexts. 543 struct ExpressionEvaluationContextRecord { 544 /// \brief The expression evaluation context. 545 ExpressionEvaluationContext Context; 546 547 /// \brief Whether the enclosing context needed a cleanup. 548 bool ParentNeedsCleanups; 549 550 /// \brief The number of temporaries that were active when we 551 /// entered this expression evaluation context. 552 unsigned NumTemporaries; 553 554 /// \brief The set of declarations referenced within a 555 /// potentially potentially-evaluated context. 556 /// 557 /// When leaving a potentially potentially-evaluated context, each 558 /// of these elements will be as referenced if the corresponding 559 /// potentially potentially evaluated expression is potentially 560 /// evaluated. 561 PotentiallyReferencedDecls *PotentiallyReferenced; 562 563 /// \brief The set of diagnostics to emit should this potentially 564 /// potentially-evaluated context become evaluated. 565 PotentiallyEmittedDiagnostics *PotentiallyDiagnosed; 566 567 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 568 unsigned NumTemporaries, 569 bool ParentNeedsCleanups) 570 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups), 571 NumTemporaries(NumTemporaries), 572 PotentiallyReferenced(0), PotentiallyDiagnosed(0) { } 573 574 void addReferencedDecl(SourceLocation Loc, Decl *Decl) { 575 if (!PotentiallyReferenced) 576 PotentiallyReferenced = new PotentiallyReferencedDecls; 577 PotentiallyReferenced->push_back(std::make_pair(Loc, Decl)); 578 } 579 580 void addDiagnostic(SourceLocation Loc, const PartialDiagnostic &PD) { 581 if (!PotentiallyDiagnosed) 582 PotentiallyDiagnosed = new PotentiallyEmittedDiagnostics; 583 PotentiallyDiagnosed->push_back(std::make_pair(Loc, PD)); 584 } 585 586 void Destroy() { 587 delete PotentiallyReferenced; 588 delete PotentiallyDiagnosed; 589 PotentiallyReferenced = 0; 590 PotentiallyDiagnosed = 0; 591 } 592 }; 593 594 /// A stack of expression evaluation contexts. 595 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 596 597 /// SpecialMemberOverloadResult - The overloading result for a special member 598 /// function. 599 /// 600 /// This is basically a wrapper around PointerIntPair. The lowest bit of the 601 /// integer is used to determine whether we have a parameter qualification 602 /// match, the second-lowest is whether we had success in resolving the 603 /// overload to a unique non-deleted function. 604 /// 605 /// The ConstParamMatch bit represents whether, when looking up a copy 606 /// constructor or assignment operator, we found a potential copy 607 /// constructor/assignment operator whose first parameter is const-qualified. 608 /// This is used for determining parameter types of other objects and is 609 /// utterly meaningless on other types of special members. 610 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 611 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 612 public: 613 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 614 : FastFoldingSetNode(ID) 615 {} 616 617 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 618 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 619 620 bool hasSuccess() const { return Pair.getInt() & 0x1; } 621 void setSuccess(bool B) { 622 Pair.setInt(unsigned(B) | hasConstParamMatch() << 1); 623 } 624 625 bool hasConstParamMatch() const { return Pair.getInt() & 0x2; } 626 void setConstParamMatch(bool B) { 627 Pair.setInt(B << 1 | unsigned(hasSuccess())); 628 } 629 }; 630 631 /// \brief A cache of special member function overload resolution results 632 /// for C++ records. 633 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 634 635 /// \brief The kind of translation unit we are processing. 636 /// 637 /// When we're processing a complete translation unit, Sema will perform 638 /// end-of-translation-unit semantic tasks (such as creating 639 /// initializers for tentative definitions in C) once parsing has 640 /// completed. Modules and precompiled headers perform different kinds of 641 /// checks. 642 TranslationUnitKind TUKind; 643 644 llvm::BumpPtrAllocator BumpAlloc; 645 646 /// \brief The number of SFINAE diagnostics that have been trapped. 647 unsigned NumSFINAEErrors; 648 649 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> > 650 UnparsedDefaultArgInstantiationsMap; 651 652 /// \brief A mapping from parameters with unparsed default arguments to the 653 /// set of instantiations of each parameter. 654 /// 655 /// This mapping is a temporary data structure used when parsing 656 /// nested class templates or nested classes of class templates, 657 /// where we might end up instantiating an inner class before the 658 /// default arguments of its methods have been parsed. 659 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 660 661 // Contains the locations of the beginning of unparsed default 662 // argument locations. 663 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 664 665 /// UndefinedInternals - all the used, undefined objects with 666 /// internal linkage in this translation unit. 667 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 668 669 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 670 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 671 672 /// Method Pool - allows efficient lookup when typechecking messages to "id". 673 /// We need to maintain a list, since selectors can have differing signatures 674 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 675 /// of selectors are "overloaded"). 676 GlobalMethodPool MethodPool; 677 678 /// Method selectors used in a @selector expression. Used for implementation 679 /// of -Wselector. 680 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 681 682 GlobalMethodPool::iterator ReadMethodPool(Selector Sel); 683 684 /// Private Helper predicate to check for 'self'. 685 bool isSelfExpr(Expr *RExpr); 686public: 687 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 688 TranslationUnitKind TUKind = TU_Complete, 689 CodeCompleteConsumer *CompletionConsumer = 0); 690 ~Sema(); 691 692 /// \brief Perform initialization that occurs after the parser has been 693 /// initialized but before it parses anything. 694 void Initialize(); 695 696 const LangOptions &getLangOptions() const { return LangOpts; } 697 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 698 FPOptions &getFPOptions() { return FPFeatures; } 699 700 DiagnosticsEngine &getDiagnostics() const { return Diags; } 701 SourceManager &getSourceManager() const { return SourceMgr; } 702 const TargetAttributesSema &getTargetAttributesSema() const; 703 Preprocessor &getPreprocessor() const { return PP; } 704 ASTContext &getASTContext() const { return Context; } 705 ASTConsumer &getASTConsumer() const { return Consumer; } 706 ASTMutationListener *getASTMutationListener() const; 707 708 void PrintStats() const; 709 710 /// \brief Helper class that creates diagnostics with optional 711 /// template instantiation stacks. 712 /// 713 /// This class provides a wrapper around the basic DiagnosticBuilder 714 /// class that emits diagnostics. SemaDiagnosticBuilder is 715 /// responsible for emitting the diagnostic (as DiagnosticBuilder 716 /// does) and, if the diagnostic comes from inside a template 717 /// instantiation, printing the template instantiation stack as 718 /// well. 719 class SemaDiagnosticBuilder : public DiagnosticBuilder { 720 Sema &SemaRef; 721 unsigned DiagID; 722 723 public: 724 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 725 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 726 727 explicit SemaDiagnosticBuilder(Sema &SemaRef) 728 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 729 730 ~SemaDiagnosticBuilder(); 731 }; 732 733 /// \brief Emit a diagnostic. 734 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 735 736 /// \brief Emit a partial diagnostic. 737 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 738 739 /// \brief Build a partial diagnostic. 740 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 741 742 bool findMacroSpelling(SourceLocation &loc, StringRef name); 743 744 ExprResult Owned(Expr* E) { return E; } 745 ExprResult Owned(ExprResult R) { return R; } 746 StmtResult Owned(Stmt* S) { return S; } 747 748 void ActOnEndOfTranslationUnit(); 749 750 void CheckDelegatingCtorCycles(); 751 752 Scope *getScopeForContext(DeclContext *Ctx); 753 754 void PushFunctionScope(); 755 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 756 void PopFunctionOrBlockScope(const sema::AnalysisBasedWarnings::Policy *WP =0, 757 const Decl *D = 0, const BlockExpr *blkExpr = 0); 758 759 sema::FunctionScopeInfo *getCurFunction() const { 760 return FunctionScopes.back(); 761 } 762 763 bool hasAnyUnrecoverableErrorsInThisFunction() const; 764 765 /// \brief Retrieve the current block, if any. 766 sema::BlockScopeInfo *getCurBlock(); 767 768 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 769 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 770 771 //===--------------------------------------------------------------------===// 772 // Type Analysis / Processing: SemaType.cpp. 773 // 774 775 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 776 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 777 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 778 } 779 QualType BuildPointerType(QualType T, 780 SourceLocation Loc, DeclarationName Entity); 781 QualType BuildReferenceType(QualType T, bool LValueRef, 782 SourceLocation Loc, DeclarationName Entity); 783 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 784 Expr *ArraySize, unsigned Quals, 785 SourceRange Brackets, DeclarationName Entity); 786 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 787 SourceLocation AttrLoc); 788 QualType BuildFunctionType(QualType T, 789 QualType *ParamTypes, unsigned NumParamTypes, 790 bool Variadic, unsigned Quals, 791 RefQualifierKind RefQualifier, 792 SourceLocation Loc, DeclarationName Entity, 793 FunctionType::ExtInfo Info); 794 QualType BuildMemberPointerType(QualType T, QualType Class, 795 SourceLocation Loc, 796 DeclarationName Entity); 797 QualType BuildBlockPointerType(QualType T, 798 SourceLocation Loc, DeclarationName Entity); 799 QualType BuildParenType(QualType T); 800 QualType BuildAtomicType(QualType T, SourceLocation Loc); 801 802 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); 803 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); 804 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 805 TypeSourceInfo *ReturnTypeInfo); 806 /// \brief Package the given type and TSI into a ParsedType. 807 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 808 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 809 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 810 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 811 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 812 bool CheckDistantExceptionSpec(QualType T); 813 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 814 bool CheckEquivalentExceptionSpec( 815 const FunctionProtoType *Old, SourceLocation OldLoc, 816 const FunctionProtoType *New, SourceLocation NewLoc); 817 bool CheckEquivalentExceptionSpec( 818 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 819 const FunctionProtoType *Old, SourceLocation OldLoc, 820 const FunctionProtoType *New, SourceLocation NewLoc, 821 bool *MissingExceptionSpecification = 0, 822 bool *MissingEmptyExceptionSpecification = 0, 823 bool AllowNoexceptAllMatchWithNoSpec = false, 824 bool IsOperatorNew = false); 825 bool CheckExceptionSpecSubset( 826 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 827 const FunctionProtoType *Superset, SourceLocation SuperLoc, 828 const FunctionProtoType *Subset, SourceLocation SubLoc); 829 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 830 const FunctionProtoType *Target, SourceLocation TargetLoc, 831 const FunctionProtoType *Source, SourceLocation SourceLoc); 832 833 TypeResult ActOnTypeName(Scope *S, Declarator &D); 834 835 /// \brief The parser has parsed the context-sensitive type 'instancetype' 836 /// in an Objective-C message declaration. Return the appropriate type. 837 ParsedType ActOnObjCInstanceType(SourceLocation Loc); 838 839 bool RequireCompleteType(SourceLocation Loc, QualType T, 840 const PartialDiagnostic &PD, 841 std::pair<SourceLocation, PartialDiagnostic> Note); 842 bool RequireCompleteType(SourceLocation Loc, QualType T, 843 const PartialDiagnostic &PD); 844 bool RequireCompleteType(SourceLocation Loc, QualType T, 845 unsigned DiagID); 846 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 847 std::pair<SourceLocation, 848 PartialDiagnostic> Note); 849 850 bool RequireLiteralType(SourceLocation Loc, QualType T, 851 const PartialDiagnostic &PD, 852 bool AllowIncompleteType = false); 853 854 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 855 const CXXScopeSpec &SS, QualType T); 856 857 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 858 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 859 QualType BuildUnaryTransformType(QualType BaseType, 860 UnaryTransformType::UTTKind UKind, 861 SourceLocation Loc); 862 863 //===--------------------------------------------------------------------===// 864 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 865 // 866 867 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 868 869 void DiagnoseUseOfUnimplementedSelectors(); 870 871 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 872 Scope *S, CXXScopeSpec *SS = 0, 873 bool isClassName = false, 874 bool HasTrailingDot = false, 875 ParsedType ObjectType = ParsedType(), 876 bool WantNontrivialTypeSourceInfo = false); 877 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 878 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS); 879 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 880 SourceLocation IILoc, 881 Scope *S, 882 CXXScopeSpec *SS, 883 ParsedType &SuggestedType); 884 885 /// \brief Describes the result of the name lookup and resolution performed 886 /// by \c ClassifyName(). 887 enum NameClassificationKind { 888 NC_Unknown, 889 NC_Error, 890 NC_Keyword, 891 NC_Type, 892 NC_Expression, 893 NC_NestedNameSpecifier, 894 NC_TypeTemplate, 895 NC_FunctionTemplate 896 }; 897 898 class NameClassification { 899 NameClassificationKind Kind; 900 ExprResult Expr; 901 TemplateName Template; 902 ParsedType Type; 903 const IdentifierInfo *Keyword; 904 905 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 906 907 public: 908 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 909 910 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 911 912 NameClassification(const IdentifierInfo *Keyword) 913 : Kind(NC_Keyword), Keyword(Keyword) { } 914 915 static NameClassification Error() { 916 return NameClassification(NC_Error); 917 } 918 919 static NameClassification Unknown() { 920 return NameClassification(NC_Unknown); 921 } 922 923 static NameClassification NestedNameSpecifier() { 924 return NameClassification(NC_NestedNameSpecifier); 925 } 926 927 static NameClassification TypeTemplate(TemplateName Name) { 928 NameClassification Result(NC_TypeTemplate); 929 Result.Template = Name; 930 return Result; 931 } 932 933 static NameClassification FunctionTemplate(TemplateName Name) { 934 NameClassification Result(NC_FunctionTemplate); 935 Result.Template = Name; 936 return Result; 937 } 938 939 NameClassificationKind getKind() const { return Kind; } 940 941 ParsedType getType() const { 942 assert(Kind == NC_Type); 943 return Type; 944 } 945 946 ExprResult getExpression() const { 947 assert(Kind == NC_Expression); 948 return Expr; 949 } 950 951 TemplateName getTemplateName() const { 952 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 953 return Template; 954 } 955 956 TemplateNameKind getTemplateNameKind() const { 957 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 958 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 959 } 960}; 961 962 /// \brief Perform name lookup on the given name, classifying it based on 963 /// the results of name lookup and the following token. 964 /// 965 /// This routine is used by the parser to resolve identifiers and help direct 966 /// parsing. When the identifier cannot be found, this routine will attempt 967 /// to correct the typo and classify based on the resulting name. 968 /// 969 /// \param S The scope in which we're performing name lookup. 970 /// 971 /// \param SS The nested-name-specifier that precedes the name. 972 /// 973 /// \param Name The identifier. If typo correction finds an alternative name, 974 /// this pointer parameter will be updated accordingly. 975 /// 976 /// \param NameLoc The location of the identifier. 977 /// 978 /// \param NextToken The token following the identifier. Used to help 979 /// disambiguate the name. 980 NameClassification ClassifyName(Scope *S, 981 CXXScopeSpec &SS, 982 IdentifierInfo *&Name, 983 SourceLocation NameLoc, 984 const Token &NextToken); 985 986 Decl *ActOnDeclarator(Scope *S, Declarator &D); 987 988 Decl *HandleDeclarator(Scope *S, Declarator &D, 989 MultiTemplateParamsArg TemplateParameterLists, 990 bool IsFunctionDefinition); 991 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 992 const LookupResult &Previous, 993 Scope *S); 994 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 995 void DiagnoseFunctionSpecifiers(Declarator& D); 996 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 997 void CheckShadow(Scope *S, VarDecl *D); 998 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 999 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 1000 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1001 QualType R, TypeSourceInfo *TInfo, 1002 LookupResult &Previous, bool &Redeclaration); 1003 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 1004 LookupResult &Previous, bool &Redeclaration); 1005 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1006 QualType R, TypeSourceInfo *TInfo, 1007 LookupResult &Previous, 1008 MultiTemplateParamsArg TemplateParamLists, 1009 bool &Redeclaration); 1010 void CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous, 1011 bool &Redeclaration); 1012 void CheckCompleteVariableDeclaration(VarDecl *var); 1013 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1014 QualType R, TypeSourceInfo *TInfo, 1015 LookupResult &Previous, 1016 MultiTemplateParamsArg TemplateParamLists, 1017 bool IsFunctionDefinition, 1018 bool &Redeclaration, 1019 bool &AddToScope); 1020 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1021 1022 /// \brief The kind of constexpr declaration checking we are performing. 1023 /// 1024 /// The kind affects which diagnostics (if any) are emitted if the function 1025 /// does not satisfy the requirements of a constexpr function declaration. 1026 enum CheckConstexprKind { 1027 /// \brief Check a constexpr function declaration, and produce errors if it 1028 /// does not satisfy the requirements. 1029 CCK_Declaration, 1030 /// \brief Check a constexpr function template instantiation. 1031 CCK_Instantiation, 1032 /// \brief Produce notes explaining why an instantiation was not constexpr. 1033 CCK_NoteNonConstexprInstantiation 1034 }; 1035 bool CheckConstexprFunctionDecl(const FunctionDecl *FD, CheckConstexprKind CCK); 1036 bool CheckConstexprFunctionBody(const FunctionDecl *FD, Stmt *Body); 1037 1038 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1039 void CheckFunctionDeclaration(Scope *S, 1040 FunctionDecl *NewFD, LookupResult &Previous, 1041 bool IsExplicitSpecialization, 1042 bool &Redeclaration); 1043 void CheckMain(FunctionDecl *FD, const DeclSpec &D); 1044 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1045 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1046 SourceLocation Loc, 1047 QualType T); 1048 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1049 SourceLocation NameLoc, IdentifierInfo *Name, 1050 QualType T, TypeSourceInfo *TSInfo, 1051 StorageClass SC, StorageClass SCAsWritten); 1052 void ActOnParamDefaultArgument(Decl *param, 1053 SourceLocation EqualLoc, 1054 Expr *defarg); 1055 void ActOnParamUnparsedDefaultArgument(Decl *param, 1056 SourceLocation EqualLoc, 1057 SourceLocation ArgLoc); 1058 void ActOnParamDefaultArgumentError(Decl *param); 1059 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1060 SourceLocation EqualLoc); 1061 1062 void CheckSelfReference(Decl *OrigDecl, Expr *E); 1063 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1064 bool TypeMayContainAuto); 1065 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1066 void ActOnInitializerError(Decl *Dcl); 1067 void ActOnCXXForRangeDecl(Decl *D); 1068 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1069 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1070 void FinalizeDeclaration(Decl *D); 1071 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1072 Decl **Group, 1073 unsigned NumDecls); 1074 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1075 bool TypeMayContainAuto = true); 1076 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1077 SourceLocation LocAfterDecls); 1078 void CheckForFunctionRedefinition(FunctionDecl *FD); 1079 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1080 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1081 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1082 1083 void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope); 1084 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1085 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1086 1087 /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an 1088 /// attribute for which parsing is delayed. 1089 void ActOnFinishDelayedAttribute(Scope *S, Decl *D, ParsedAttributes &Attrs); 1090 1091 /// \brief Diagnose any unused parameters in the given sequence of 1092 /// ParmVarDecl pointers. 1093 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1094 ParmVarDecl * const *End); 1095 1096 /// \brief Diagnose whether the size of parameters or return value of a 1097 /// function or obj-c method definition is pass-by-value and larger than a 1098 /// specified threshold. 1099 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1100 ParmVarDecl * const *End, 1101 QualType ReturnTy, 1102 NamedDecl *D); 1103 1104 void DiagnoseInvalidJumps(Stmt *Body); 1105 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1106 SourceLocation AsmLoc, 1107 SourceLocation RParenLoc); 1108 1109 /// \brief The parser has processed a module import declaration. 1110 /// 1111 /// \param ImportLoc The location of the '__import_module__' keyword. 1112 /// 1113 /// \param ModuleName The name of the module. 1114 /// 1115 /// \param ModuleNameLoc The location of the module name. 1116 DeclResult ActOnModuleImport(SourceLocation ImportLoc, 1117 IdentifierInfo &ModuleName, 1118 SourceLocation ModuleNameLoc); 1119 1120 /// \brief Diagnose that \p New is a module-private redeclaration of 1121 /// \p Old. 1122 void diagnoseModulePrivateRedeclaration(NamedDecl *New, NamedDecl *Old, 1123 SourceLocation ModulePrivateKeyword 1124 = SourceLocation()); 1125 1126 /// \brief Retrieve a suitable printing policy. 1127 PrintingPolicy getPrintingPolicy() const; 1128 1129 /// Scope actions. 1130 void ActOnPopScope(SourceLocation Loc, Scope *S); 1131 void ActOnTranslationUnitScope(Scope *S); 1132 1133 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1134 DeclSpec &DS); 1135 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1136 DeclSpec &DS, 1137 MultiTemplateParamsArg TemplateParams); 1138 1139 StmtResult ActOnVlaStmt(const DeclSpec &DS); 1140 1141 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1142 AccessSpecifier AS, 1143 RecordDecl *Record); 1144 1145 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1146 RecordDecl *Record); 1147 1148 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1149 TagTypeKind NewTag, bool isDefinition, 1150 SourceLocation NewTagLoc, 1151 const IdentifierInfo &Name); 1152 1153 enum TagUseKind { 1154 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1155 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1156 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1157 TUK_Friend // Friend declaration: 'friend struct foo;' 1158 }; 1159 1160 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1161 SourceLocation KWLoc, CXXScopeSpec &SS, 1162 IdentifierInfo *Name, SourceLocation NameLoc, 1163 AttributeList *Attr, AccessSpecifier AS, 1164 SourceLocation ModulePrivateLoc, 1165 MultiTemplateParamsArg TemplateParameterLists, 1166 bool &OwnedDecl, bool &IsDependent, bool ScopedEnum, 1167 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1168 1169 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1170 unsigned TagSpec, SourceLocation TagLoc, 1171 CXXScopeSpec &SS, 1172 IdentifierInfo *Name, SourceLocation NameLoc, 1173 AttributeList *Attr, 1174 MultiTemplateParamsArg TempParamLists); 1175 1176 TypeResult ActOnDependentTag(Scope *S, 1177 unsigned TagSpec, 1178 TagUseKind TUK, 1179 const CXXScopeSpec &SS, 1180 IdentifierInfo *Name, 1181 SourceLocation TagLoc, 1182 SourceLocation NameLoc); 1183 1184 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1185 IdentifierInfo *ClassName, 1186 SmallVectorImpl<Decl *> &Decls); 1187 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1188 Declarator &D, Expr *BitfieldWidth); 1189 1190 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1191 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1192 AccessSpecifier AS); 1193 1194 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1195 TypeSourceInfo *TInfo, 1196 RecordDecl *Record, SourceLocation Loc, 1197 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1198 SourceLocation TSSL, 1199 AccessSpecifier AS, NamedDecl *PrevDecl, 1200 Declarator *D = 0); 1201 1202 enum CXXSpecialMember { 1203 CXXDefaultConstructor, 1204 CXXCopyConstructor, 1205 CXXMoveConstructor, 1206 CXXCopyAssignment, 1207 CXXMoveAssignment, 1208 CXXDestructor, 1209 CXXInvalid 1210 }; 1211 bool CheckNontrivialField(FieldDecl *FD); 1212 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1213 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1214 void ActOnLastBitfield(SourceLocation DeclStart, 1215 SmallVectorImpl<Decl *> &AllIvarDecls); 1216 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, 1217 Declarator &D, Expr *BitfieldWidth, 1218 tok::ObjCKeywordKind visibility); 1219 1220 // This is used for both record definitions and ObjC interface declarations. 1221 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1222 llvm::ArrayRef<Decl *> Fields, 1223 SourceLocation LBrac, SourceLocation RBrac, 1224 AttributeList *AttrList); 1225 1226 /// ActOnTagStartDefinition - Invoked when we have entered the 1227 /// scope of a tag's definition (e.g., for an enumeration, class, 1228 /// struct, or union). 1229 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1230 1231 Decl *ActOnObjCContainerStartDefinition(Decl *IDecl); 1232 1233 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1234 /// C++ record definition's base-specifiers clause and are starting its 1235 /// member declarations. 1236 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1237 SourceLocation FinalLoc, 1238 SourceLocation LBraceLoc); 1239 1240 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1241 /// the definition of a tag (enumeration, class, struct, or union). 1242 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1243 SourceLocation RBraceLoc); 1244 1245 void ActOnObjCContainerFinishDefinition(); 1246 1247 /// \brief Invoked when we must temporarily exit the objective-c container 1248 /// scope for parsing/looking-up C constructs. 1249 /// 1250 /// Must be followed by a call to \see ActOnObjCReenterContainerContext 1251 void ActOnObjCTemporaryExitContainerContext(); 1252 void ActOnObjCReenterContainerContext(); 1253 1254 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1255 /// error parsing the definition of a tag. 1256 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1257 1258 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1259 EnumConstantDecl *LastEnumConst, 1260 SourceLocation IdLoc, 1261 IdentifierInfo *Id, 1262 Expr *val); 1263 1264 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1265 SourceLocation IdLoc, IdentifierInfo *Id, 1266 AttributeList *Attrs, 1267 SourceLocation EqualLoc, Expr *Val); 1268 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1269 SourceLocation RBraceLoc, Decl *EnumDecl, 1270 Decl **Elements, unsigned NumElements, 1271 Scope *S, AttributeList *Attr); 1272 1273 DeclContext *getContainingDC(DeclContext *DC); 1274 1275 /// Set the current declaration context until it gets popped. 1276 void PushDeclContext(Scope *S, DeclContext *DC); 1277 void PopDeclContext(); 1278 1279 /// EnterDeclaratorContext - Used when we must lookup names in the context 1280 /// of a declarator's nested name specifier. 1281 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1282 void ExitDeclaratorContext(Scope *S); 1283 1284 /// Push the parameters of D, which must be a function, into scope. 1285 void ActOnReenterFunctionContext(Scope* S, Decl* D); 1286 void ActOnExitFunctionContext() { PopDeclContext(); } 1287 1288 DeclContext *getFunctionLevelDeclContext(); 1289 1290 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1291 /// to the function decl for the function being parsed. If we're currently 1292 /// in a 'block', this returns the containing context. 1293 FunctionDecl *getCurFunctionDecl(); 1294 1295 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1296 /// the method decl for the method being parsed. If we're currently 1297 /// in a 'block', this returns the containing context. 1298 ObjCMethodDecl *getCurMethodDecl(); 1299 1300 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1301 /// or C function we're in, otherwise return null. If we're currently 1302 /// in a 'block', this returns the containing context. 1303 NamedDecl *getCurFunctionOrMethodDecl(); 1304 1305 /// Add this decl to the scope shadowed decl chains. 1306 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1307 1308 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1309 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1310 /// true if 'D' belongs to the given declaration context. 1311 /// 1312 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1313 /// whether the declaration is in scope for the purposes of explicit template 1314 /// instantiation or specialization. The default is false. 1315 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1316 bool ExplicitInstantiationOrSpecialization = false); 1317 1318 /// Finds the scope corresponding to the given decl context, if it 1319 /// happens to be an enclosing scope. Otherwise return NULL. 1320 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1321 1322 /// Subroutines of ActOnDeclarator(). 1323 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1324 TypeSourceInfo *TInfo); 1325 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1326 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1327 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1328 void mergeObjCMethodDecls(ObjCMethodDecl *New, const ObjCMethodDecl *Old); 1329 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1330 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1331 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1332 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1333 1334 // AssignmentAction - This is used by all the assignment diagnostic functions 1335 // to represent what is actually causing the operation 1336 enum AssignmentAction { 1337 AA_Assigning, 1338 AA_Passing, 1339 AA_Returning, 1340 AA_Converting, 1341 AA_Initializing, 1342 AA_Sending, 1343 AA_Casting 1344 }; 1345 1346 /// C++ Overloading. 1347 enum OverloadKind { 1348 /// This is a legitimate overload: the existing declarations are 1349 /// functions or function templates with different signatures. 1350 Ovl_Overload, 1351 1352 /// This is not an overload because the signature exactly matches 1353 /// an existing declaration. 1354 Ovl_Match, 1355 1356 /// This is not an overload because the lookup results contain a 1357 /// non-function. 1358 Ovl_NonFunction 1359 }; 1360 OverloadKind CheckOverload(Scope *S, 1361 FunctionDecl *New, 1362 const LookupResult &OldDecls, 1363 NamedDecl *&OldDecl, 1364 bool IsForUsingDecl); 1365 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1366 1367 /// \brief Checks availability of the function depending on the current 1368 /// function context.Inside an unavailable function,unavailability is ignored. 1369 /// 1370 /// \returns true if \arg FD is unavailable and current context is inside 1371 /// an available function, false otherwise. 1372 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1373 1374 ImplicitConversionSequence 1375 TryImplicitConversion(Expr *From, QualType ToType, 1376 bool SuppressUserConversions, 1377 bool AllowExplicit, 1378 bool InOverloadResolution, 1379 bool CStyle, 1380 bool AllowObjCWritebackConversion); 1381 1382 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1383 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1384 bool IsComplexPromotion(QualType FromType, QualType ToType); 1385 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1386 bool InOverloadResolution, 1387 QualType& ConvertedType, bool &IncompatibleObjC); 1388 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1389 QualType& ConvertedType, bool &IncompatibleObjC); 1390 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1391 QualType &ConvertedType); 1392 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1393 QualType& ConvertedType); 1394 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1395 const FunctionProtoType *NewType); 1396 1397 CastKind PrepareCastToObjCObjectPointer(ExprResult &E); 1398 bool CheckPointerConversion(Expr *From, QualType ToType, 1399 CastKind &Kind, 1400 CXXCastPath& BasePath, 1401 bool IgnoreBaseAccess); 1402 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1403 bool InOverloadResolution, 1404 QualType &ConvertedType); 1405 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1406 CastKind &Kind, 1407 CXXCastPath &BasePath, 1408 bool IgnoreBaseAccess); 1409 bool IsQualificationConversion(QualType FromType, QualType ToType, 1410 bool CStyle, bool &ObjCLifetimeConversion); 1411 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1412 QualType &ResultTy); 1413 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1414 1415 1416 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1417 const VarDecl *NRVOCandidate, 1418 QualType ResultType, 1419 Expr *Value, 1420 bool AllowNRVO = true); 1421 1422 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1423 ExprResult Init); 1424 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1425 SourceLocation EqualLoc, 1426 ExprResult Init, 1427 bool TopLevelOfInitList = false); 1428 ExprResult PerformObjectArgumentInitialization(Expr *From, 1429 NestedNameSpecifier *Qualifier, 1430 NamedDecl *FoundDecl, 1431 CXXMethodDecl *Method); 1432 1433 ExprResult PerformContextuallyConvertToBool(Expr *From); 1434 ExprResult PerformContextuallyConvertToObjCPointer(Expr *From); 1435 1436 ExprResult 1437 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1438 const PartialDiagnostic &NotIntDiag, 1439 const PartialDiagnostic &IncompleteDiag, 1440 const PartialDiagnostic &ExplicitConvDiag, 1441 const PartialDiagnostic &ExplicitConvNote, 1442 const PartialDiagnostic &AmbigDiag, 1443 const PartialDiagnostic &AmbigNote, 1444 const PartialDiagnostic &ConvDiag); 1445 1446 ExprResult PerformObjectMemberConversion(Expr *From, 1447 NestedNameSpecifier *Qualifier, 1448 NamedDecl *FoundDecl, 1449 NamedDecl *Member); 1450 1451 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1452 // TODO: make this is a typesafe union. 1453 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1454 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1455 1456 void AddOverloadCandidate(NamedDecl *Function, 1457 DeclAccessPair FoundDecl, 1458 Expr **Args, unsigned NumArgs, 1459 OverloadCandidateSet &CandidateSet); 1460 1461 void AddOverloadCandidate(FunctionDecl *Function, 1462 DeclAccessPair FoundDecl, 1463 Expr **Args, unsigned NumArgs, 1464 OverloadCandidateSet& CandidateSet, 1465 bool SuppressUserConversions = false, 1466 bool PartialOverloading = false); 1467 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1468 Expr **Args, unsigned NumArgs, 1469 OverloadCandidateSet& CandidateSet, 1470 bool SuppressUserConversions = false); 1471 void AddMethodCandidate(DeclAccessPair FoundDecl, 1472 QualType ObjectType, 1473 Expr::Classification ObjectClassification, 1474 Expr **Args, unsigned NumArgs, 1475 OverloadCandidateSet& CandidateSet, 1476 bool SuppressUserConversion = false); 1477 void AddMethodCandidate(CXXMethodDecl *Method, 1478 DeclAccessPair FoundDecl, 1479 CXXRecordDecl *ActingContext, QualType ObjectType, 1480 Expr::Classification ObjectClassification, 1481 Expr **Args, unsigned NumArgs, 1482 OverloadCandidateSet& CandidateSet, 1483 bool SuppressUserConversions = false); 1484 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1485 DeclAccessPair FoundDecl, 1486 CXXRecordDecl *ActingContext, 1487 TemplateArgumentListInfo *ExplicitTemplateArgs, 1488 QualType ObjectType, 1489 Expr::Classification ObjectClassification, 1490 Expr **Args, unsigned NumArgs, 1491 OverloadCandidateSet& CandidateSet, 1492 bool SuppressUserConversions = false); 1493 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1494 DeclAccessPair FoundDecl, 1495 TemplateArgumentListInfo *ExplicitTemplateArgs, 1496 Expr **Args, unsigned NumArgs, 1497 OverloadCandidateSet& CandidateSet, 1498 bool SuppressUserConversions = false); 1499 void AddConversionCandidate(CXXConversionDecl *Conversion, 1500 DeclAccessPair FoundDecl, 1501 CXXRecordDecl *ActingContext, 1502 Expr *From, QualType ToType, 1503 OverloadCandidateSet& CandidateSet); 1504 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1505 DeclAccessPair FoundDecl, 1506 CXXRecordDecl *ActingContext, 1507 Expr *From, QualType ToType, 1508 OverloadCandidateSet &CandidateSet); 1509 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1510 DeclAccessPair FoundDecl, 1511 CXXRecordDecl *ActingContext, 1512 const FunctionProtoType *Proto, 1513 Expr *Object, Expr **Args, unsigned NumArgs, 1514 OverloadCandidateSet& CandidateSet); 1515 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1516 SourceLocation OpLoc, 1517 Expr **Args, unsigned NumArgs, 1518 OverloadCandidateSet& CandidateSet, 1519 SourceRange OpRange = SourceRange()); 1520 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1521 Expr **Args, unsigned NumArgs, 1522 OverloadCandidateSet& CandidateSet, 1523 bool IsAssignmentOperator = false, 1524 unsigned NumContextualBoolArguments = 0); 1525 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1526 SourceLocation OpLoc, 1527 Expr **Args, unsigned NumArgs, 1528 OverloadCandidateSet& CandidateSet); 1529 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1530 bool Operator, 1531 Expr **Args, unsigned NumArgs, 1532 TemplateArgumentListInfo *ExplicitTemplateArgs, 1533 OverloadCandidateSet& CandidateSet, 1534 bool PartialOverloading = false, 1535 bool StdNamespaceIsAssociated = false); 1536 1537 // Emit as a 'note' the specific overload candidate 1538 void NoteOverloadCandidate(FunctionDecl *Fn); 1539 1540 // Emit as a series of 'note's all template and non-templates 1541 // identified by the expression Expr 1542 void NoteAllOverloadCandidates(Expr* E); 1543 1544 // [PossiblyAFunctionType] --> [Return] 1545 // NonFunctionType --> NonFunctionType 1546 // R (A) --> R(A) 1547 // R (*)(A) --> R (A) 1548 // R (&)(A) --> R (A) 1549 // R (S::*)(A) --> R (A) 1550 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1551 1552 FunctionDecl *ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, QualType TargetType, 1553 bool Complain, 1554 DeclAccessPair &Found); 1555 1556 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1557 bool Complain = false, 1558 DeclAccessPair* Found = 0); 1559 1560 ExprResult ResolveAndFixSingleFunctionTemplateSpecialization( 1561 Expr *SrcExpr, bool DoFunctionPointerConverion = false, 1562 bool Complain = false, 1563 const SourceRange& OpRangeForComplaining = SourceRange(), 1564 QualType DestTypeForComplaining = QualType(), 1565 unsigned DiagIDForComplaining = 0); 1566 1567 1568 Expr *FixOverloadedFunctionReference(Expr *E, 1569 DeclAccessPair FoundDecl, 1570 FunctionDecl *Fn); 1571 ExprResult FixOverloadedFunctionReference(ExprResult, 1572 DeclAccessPair FoundDecl, 1573 FunctionDecl *Fn); 1574 1575 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1576 Expr **Args, unsigned NumArgs, 1577 OverloadCandidateSet &CandidateSet, 1578 bool PartialOverloading = false); 1579 1580 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1581 UnresolvedLookupExpr *ULE, 1582 SourceLocation LParenLoc, 1583 Expr **Args, unsigned NumArgs, 1584 SourceLocation RParenLoc, 1585 Expr *ExecConfig); 1586 1587 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1588 unsigned Opc, 1589 const UnresolvedSetImpl &Fns, 1590 Expr *input); 1591 1592 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1593 unsigned Opc, 1594 const UnresolvedSetImpl &Fns, 1595 Expr *LHS, Expr *RHS); 1596 1597 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1598 SourceLocation RLoc, 1599 Expr *Base,Expr *Idx); 1600 1601 ExprResult 1602 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1603 SourceLocation LParenLoc, Expr **Args, 1604 unsigned NumArgs, SourceLocation RParenLoc); 1605 ExprResult 1606 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1607 Expr **Args, unsigned NumArgs, 1608 SourceLocation RParenLoc); 1609 1610 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1611 SourceLocation OpLoc); 1612 1613 /// CheckCallReturnType - Checks that a call expression's return type is 1614 /// complete. Returns true on failure. The location passed in is the location 1615 /// that best represents the call. 1616 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1617 CallExpr *CE, FunctionDecl *FD); 1618 1619 /// Helpers for dealing with blocks and functions. 1620 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1621 bool CheckParameterNames); 1622 void CheckCXXDefaultArguments(FunctionDecl *FD); 1623 void CheckExtraCXXDefaultArguments(Declarator &D); 1624 Scope *getNonFieldDeclScope(Scope *S); 1625 1626 /// \name Name lookup 1627 /// 1628 /// These routines provide name lookup that is used during semantic 1629 /// analysis to resolve the various kinds of names (identifiers, 1630 /// overloaded operator names, constructor names, etc.) into zero or 1631 /// more declarations within a particular scope. The major entry 1632 /// points are LookupName, which performs unqualified name lookup, 1633 /// and LookupQualifiedName, which performs qualified name lookup. 1634 /// 1635 /// All name lookup is performed based on some specific criteria, 1636 /// which specify what names will be visible to name lookup and how 1637 /// far name lookup should work. These criteria are important both 1638 /// for capturing language semantics (certain lookups will ignore 1639 /// certain names, for example) and for performance, since name 1640 /// lookup is often a bottleneck in the compilation of C++. Name 1641 /// lookup criteria is specified via the LookupCriteria enumeration. 1642 /// 1643 /// The results of name lookup can vary based on the kind of name 1644 /// lookup performed, the current language, and the translation 1645 /// unit. In C, for example, name lookup will either return nothing 1646 /// (no entity found) or a single declaration. In C++, name lookup 1647 /// can additionally refer to a set of overloaded functions or 1648 /// result in an ambiguity. All of the possible results of name 1649 /// lookup are captured by the LookupResult class, which provides 1650 /// the ability to distinguish among them. 1651 //@{ 1652 1653 /// @brief Describes the kind of name lookup to perform. 1654 enum LookupNameKind { 1655 /// Ordinary name lookup, which finds ordinary names (functions, 1656 /// variables, typedefs, etc.) in C and most kinds of names 1657 /// (functions, variables, members, types, etc.) in C++. 1658 LookupOrdinaryName = 0, 1659 /// Tag name lookup, which finds the names of enums, classes, 1660 /// structs, and unions. 1661 LookupTagName, 1662 /// Label name lookup. 1663 LookupLabel, 1664 /// Member name lookup, which finds the names of 1665 /// class/struct/union members. 1666 LookupMemberName, 1667 /// Look up of an operator name (e.g., operator+) for use with 1668 /// operator overloading. This lookup is similar to ordinary name 1669 /// lookup, but will ignore any declarations that are class members. 1670 LookupOperatorName, 1671 /// Look up of a name that precedes the '::' scope resolution 1672 /// operator in C++. This lookup completely ignores operator, object, 1673 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1674 LookupNestedNameSpecifierName, 1675 /// Look up a namespace name within a C++ using directive or 1676 /// namespace alias definition, ignoring non-namespace names (C++ 1677 /// [basic.lookup.udir]p1). 1678 LookupNamespaceName, 1679 /// Look up all declarations in a scope with the given name, 1680 /// including resolved using declarations. This is appropriate 1681 /// for checking redeclarations for a using declaration. 1682 LookupUsingDeclName, 1683 /// Look up an ordinary name that is going to be redeclared as a 1684 /// name with linkage. This lookup ignores any declarations that 1685 /// are outside of the current scope unless they have linkage. See 1686 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1687 LookupRedeclarationWithLinkage, 1688 /// Look up the name of an Objective-C protocol. 1689 LookupObjCProtocolName, 1690 /// Look up implicit 'self' parameter of an objective-c method. 1691 LookupObjCImplicitSelfParam, 1692 /// \brief Look up any declaration with any name. 1693 LookupAnyName 1694 }; 1695 1696 /// \brief Specifies whether (or how) name lookup is being performed for a 1697 /// redeclaration (vs. a reference). 1698 enum RedeclarationKind { 1699 /// \brief The lookup is a reference to this name that is not for the 1700 /// purpose of redeclaring the name. 1701 NotForRedeclaration = 0, 1702 /// \brief The lookup results will be used for redeclaration of a name, 1703 /// if an entity by that name already exists. 1704 ForRedeclaration 1705 }; 1706 1707private: 1708 bool CppLookupName(LookupResult &R, Scope *S); 1709 1710 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1711 CXXSpecialMember SM, 1712 bool ConstArg, 1713 bool VolatileArg, 1714 bool RValueThis, 1715 bool ConstThis, 1716 bool VolatileThis); 1717 1718 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1719 // 1720 // The boolean value will be true to indicate that the namespace was loaded 1721 // from an AST/PCH file, or false otherwise. 1722 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1723 1724 /// \brief Whether we have already loaded known namespaces from an extenal 1725 /// source. 1726 bool LoadedExternalKnownNamespaces; 1727 1728public: 1729 /// \brief Look up a name, looking for a single declaration. Return 1730 /// null if the results were absent, ambiguous, or overloaded. 1731 /// 1732 /// It is preferable to use the elaborated form and explicitly handle 1733 /// ambiguity and overloaded. 1734 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1735 SourceLocation Loc, 1736 LookupNameKind NameKind, 1737 RedeclarationKind Redecl 1738 = NotForRedeclaration); 1739 bool LookupName(LookupResult &R, Scope *S, 1740 bool AllowBuiltinCreation = false); 1741 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1742 bool InUnqualifiedLookup = false); 1743 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1744 bool AllowBuiltinCreation = false, 1745 bool EnteringContext = false); 1746 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1747 1748 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1749 QualType T1, QualType T2, 1750 UnresolvedSetImpl &Functions); 1751 1752 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1753 SourceLocation GnuLabelLoc = SourceLocation()); 1754 1755 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1756 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1757 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1758 unsigned Quals, 1759 bool *ConstParam = 0); 1760 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1761 bool RValueThis, unsigned ThisQuals, 1762 bool *ConstParam = 0); 1763 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class); 1764 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, bool RValueThis, 1765 unsigned ThisQuals); 1766 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1767 1768 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1769 Expr **Args, unsigned NumArgs, 1770 ADLResult &Functions, 1771 bool StdNamespaceIsAssociated = false); 1772 1773 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1774 VisibleDeclConsumer &Consumer, 1775 bool IncludeGlobalScope = true); 1776 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1777 VisibleDeclConsumer &Consumer, 1778 bool IncludeGlobalScope = true); 1779 1780 /// \brief The context in which typo-correction occurs. 1781 /// 1782 /// The typo-correction context affects which keywords (if any) are 1783 /// considered when trying to correct for typos. 1784 enum CorrectTypoContext { 1785 /// \brief An unknown context, where any keyword might be valid. 1786 CTC_Unknown, 1787 /// \brief A context where no keywords are used (e.g. we expect an actual 1788 /// name). 1789 CTC_NoKeywords, 1790 /// \brief A context where we're correcting a type name. 1791 CTC_Type, 1792 /// \brief An expression context. 1793 CTC_Expression, 1794 /// \brief A type cast, or anything else that can be followed by a '<'. 1795 CTC_CXXCasts, 1796 /// \brief A member lookup context. 1797 CTC_MemberLookup, 1798 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1799 CTC_ObjCIvarLookup, 1800 /// \brief An Objective-C property lookup context (e.g., self.prop). 1801 CTC_ObjCPropertyLookup, 1802 /// \brief The receiver of an Objective-C message send within an 1803 /// Objective-C method where 'super' is a valid keyword. 1804 CTC_ObjCMessageReceiver 1805 }; 1806 1807 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1808 Sema::LookupNameKind LookupKind, 1809 Scope *S, CXXScopeSpec *SS, 1810 DeclContext *MemberContext = NULL, 1811 bool EnteringContext = false, 1812 CorrectTypoContext CTC = CTC_Unknown, 1813 const ObjCObjectPointerType *OPT = NULL); 1814 1815 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1816 AssociatedNamespaceSet &AssociatedNamespaces, 1817 AssociatedClassSet &AssociatedClasses); 1818 1819 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1820 bool ConsiderLinkage, 1821 bool ExplicitInstantiationOrSpecialization); 1822 1823 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1824 //@} 1825 1826 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1827 SourceLocation IdLoc, 1828 bool TypoCorrection = false); 1829 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1830 Scope *S, bool ForRedeclaration, 1831 SourceLocation Loc); 1832 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1833 Scope *S); 1834 void AddKnownFunctionAttributes(FunctionDecl *FD); 1835 1836 // More parsing and symbol table subroutines. 1837 1838 // Decl attributes - this routine is the top level dispatcher. 1839 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1840 bool NonInheritable = true, bool Inheritable = true); 1841 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1842 bool NonInheritable = true, bool Inheritable = true); 1843 1844 void checkUnusedDeclAttributes(Declarator &D); 1845 1846 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1847 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1848 bool CheckNoReturnAttr(const AttributeList &attr); 1849 1850 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1851 bool &IncompleteImpl, unsigned DiagID); 1852 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 1853 ObjCMethodDecl *MethodDecl, 1854 bool IsProtocolMethodDecl, 1855 bool IsDeclaration = false); 1856 1857 /// WarnExactTypedMethods - This routine issues a warning if method 1858 /// implementation declaration matches exactly that of its declaration. 1859 void WarnExactTypedMethods(ObjCMethodDecl *Method, 1860 ObjCMethodDecl *MethodDecl, 1861 bool IsProtocolMethodDecl); 1862 1863 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1864 ObjCInterfaceDecl *IDecl); 1865 1866 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1867 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap; 1868 1869 /// CheckProtocolMethodDefs - This routine checks unimplemented 1870 /// methods declared in protocol, and those referenced by it. 1871 /// \param IDecl - Used for checking for methods which may have been 1872 /// inherited. 1873 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1874 ObjCProtocolDecl *PDecl, 1875 bool& IncompleteImpl, 1876 const SelectorSet &InsMap, 1877 const SelectorSet &ClsMap, 1878 ObjCContainerDecl *CDecl); 1879 1880 /// CheckImplementationIvars - This routine checks if the instance variables 1881 /// listed in the implelementation match those listed in the interface. 1882 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1883 ObjCIvarDecl **Fields, unsigned nIvars, 1884 SourceLocation Loc); 1885 1886 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1887 /// remains unimplemented in the class or category @implementation. 1888 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1889 ObjCContainerDecl* IDecl, 1890 bool IncompleteImpl = false); 1891 1892 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1893 /// which must be implemented by this implementation. 1894 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1895 ObjCContainerDecl *CDecl, 1896 const SelectorSet &InsMap); 1897 1898 /// DefaultSynthesizeProperties - This routine default synthesizes all 1899 /// properties which must be synthesized in class's @implementation. 1900 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1901 ObjCInterfaceDecl *IDecl); 1902 void DefaultSynthesizeProperties(Scope *S, Decl *D); 1903 1904 /// CollectImmediateProperties - This routine collects all properties in 1905 /// the class and its conforming protocols; but not those it its super class. 1906 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1907 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1908 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1909 1910 1911 /// LookupPropertyDecl - Looks up a property in the current class and all 1912 /// its protocols. 1913 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1914 IdentifierInfo *II); 1915 1916 /// Called by ActOnProperty to handle @property declarations in 1917 //// class extensions. 1918 Decl *HandlePropertyInClassExtension(Scope *S, 1919 SourceLocation AtLoc, 1920 FieldDeclarator &FD, 1921 Selector GetterSel, 1922 Selector SetterSel, 1923 const bool isAssign, 1924 const bool isReadWrite, 1925 const unsigned Attributes, 1926 bool *isOverridingProperty, 1927 TypeSourceInfo *T, 1928 tok::ObjCKeywordKind MethodImplKind); 1929 1930 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1931 /// handle creating the ObjcPropertyDecl for a category or @interface. 1932 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1933 ObjCContainerDecl *CDecl, 1934 SourceLocation AtLoc, 1935 FieldDeclarator &FD, 1936 Selector GetterSel, 1937 Selector SetterSel, 1938 const bool isAssign, 1939 const bool isReadWrite, 1940 const unsigned Attributes, 1941 TypeSourceInfo *T, 1942 tok::ObjCKeywordKind MethodImplKind, 1943 DeclContext *lexicalDC = 0); 1944 1945 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1946 /// warning) when atomic property has one but not the other user-declared 1947 /// setter or getter. 1948 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1949 ObjCContainerDecl* IDecl); 1950 1951 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 1952 1953 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1954 1955 enum MethodMatchStrategy { 1956 MMS_loose, 1957 MMS_strict 1958 }; 1959 1960 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1961 /// true, or false, accordingly. 1962 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1963 const ObjCMethodDecl *PrevMethod, 1964 MethodMatchStrategy strategy = MMS_strict); 1965 1966 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1967 /// or protocol against those declared in their implementations. 1968 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1969 const SelectorSet &ClsMap, 1970 SelectorSet &InsMapSeen, 1971 SelectorSet &ClsMapSeen, 1972 ObjCImplDecl* IMPDecl, 1973 ObjCContainerDecl* IDecl, 1974 bool &IncompleteImpl, 1975 bool ImmediateClass, 1976 bool WarnExactMatch=false); 1977 1978 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in 1979 /// category matches with those implemented in its primary class and 1980 /// warns each time an exact match is found. 1981 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP); 1982 1983private: 1984 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1985 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1986 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1987 1988 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1989 /// optionally warns if there are multiple signatures. 1990 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1991 bool receiverIdOrClass, 1992 bool warn, bool instance); 1993 1994public: 1995 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1996 /// unit are added to a global pool. This allows us to efficiently associate 1997 /// a selector with a method declaraation for purposes of typechecking 1998 /// messages sent to "id" (where the class of the object is unknown). 1999 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2000 AddMethodToGlobalPool(Method, impl, /*instance*/true); 2001 } 2002 2003 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 2004 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2005 AddMethodToGlobalPool(Method, impl, /*instance*/false); 2006 } 2007 2008 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global 2009 /// pool. 2010 void AddAnyMethodToGlobalPool(Decl *D); 2011 2012 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 2013 /// there are multiple signatures. 2014 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 2015 bool receiverIdOrClass=false, 2016 bool warn=true) { 2017 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2018 warn, /*instance*/true); 2019 } 2020 2021 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 2022 /// there are multiple signatures. 2023 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 2024 bool receiverIdOrClass=false, 2025 bool warn=true) { 2026 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2027 warn, /*instance*/false); 2028 } 2029 2030 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 2031 /// implementation. 2032 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 2033 2034 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 2035 /// initialization. 2036 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 2037 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 2038 2039 //===--------------------------------------------------------------------===// 2040 // Statement Parsing Callbacks: SemaStmt.cpp. 2041public: 2042 class FullExprArg { 2043 public: 2044 FullExprArg(Sema &actions) : E(0) { } 2045 2046 // FIXME: The const_cast here is ugly. RValue references would make this 2047 // much nicer (or we could duplicate a bunch of the move semantics 2048 // emulation code from Ownership.h). 2049 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 2050 2051 ExprResult release() { 2052 return move(E); 2053 } 2054 2055 Expr *get() const { return E; } 2056 2057 Expr *operator->() { 2058 return E; 2059 } 2060 2061 private: 2062 // FIXME: No need to make the entire Sema class a friend when it's just 2063 // Sema::MakeFullExpr that needs access to the constructor below. 2064 friend class Sema; 2065 2066 explicit FullExprArg(Expr *expr) : E(expr) {} 2067 2068 Expr *E; 2069 }; 2070 2071 FullExprArg MakeFullExpr(Expr *Arg) { 2072 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 2073 } 2074 2075 StmtResult ActOnExprStmt(FullExprArg Expr); 2076 2077 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 2078 bool HasLeadingEmptyMacro = false); 2079 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 2080 MultiStmtArg Elts, 2081 bool isStmtExpr); 2082 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2083 SourceLocation StartLoc, 2084 SourceLocation EndLoc); 2085 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2086 StmtResult ActOnForEachLValueExpr(Expr *E); 2087 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2088 SourceLocation DotDotDotLoc, Expr *RHSVal, 2089 SourceLocation ColonLoc); 2090 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2091 2092 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2093 SourceLocation ColonLoc, 2094 Stmt *SubStmt, Scope *CurScope); 2095 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2096 SourceLocation ColonLoc, Stmt *SubStmt); 2097 2098 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2099 FullExprArg CondVal, Decl *CondVar, 2100 Stmt *ThenVal, 2101 SourceLocation ElseLoc, Stmt *ElseVal); 2102 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2103 Expr *Cond, 2104 Decl *CondVar); 2105 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2106 Stmt *Switch, Stmt *Body); 2107 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2108 FullExprArg Cond, 2109 Decl *CondVar, Stmt *Body); 2110 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2111 SourceLocation WhileLoc, 2112 SourceLocation CondLParen, Expr *Cond, 2113 SourceLocation CondRParen); 2114 2115 StmtResult ActOnForStmt(SourceLocation ForLoc, 2116 SourceLocation LParenLoc, 2117 Stmt *First, FullExprArg Second, 2118 Decl *SecondVar, 2119 FullExprArg Third, 2120 SourceLocation RParenLoc, 2121 Stmt *Body); 2122 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc, 2123 Expr *collection); 2124 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2125 SourceLocation LParenLoc, 2126 Stmt *First, Expr *Second, 2127 SourceLocation RParenLoc, Stmt *Body); 2128 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2129 SourceLocation LParenLoc, Stmt *LoopVar, 2130 SourceLocation ColonLoc, Expr *Collection, 2131 SourceLocation RParenLoc); 2132 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2133 SourceLocation ColonLoc, 2134 Stmt *RangeDecl, Stmt *BeginEndDecl, 2135 Expr *Cond, Expr *Inc, 2136 Stmt *LoopVarDecl, 2137 SourceLocation RParenLoc); 2138 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2139 2140 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2141 SourceLocation LabelLoc, 2142 LabelDecl *TheDecl); 2143 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2144 SourceLocation StarLoc, 2145 Expr *DestExp); 2146 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2147 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2148 2149 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2150 bool AllowFunctionParameters); 2151 2152 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2153 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2154 2155 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2156 bool IsSimple, bool IsVolatile, 2157 unsigned NumOutputs, unsigned NumInputs, 2158 IdentifierInfo **Names, 2159 MultiExprArg Constraints, 2160 MultiExprArg Exprs, 2161 Expr *AsmString, 2162 MultiExprArg Clobbers, 2163 SourceLocation RParenLoc, 2164 bool MSAsm = false); 2165 2166 2167 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2168 SourceLocation StartLoc, 2169 SourceLocation IdLoc, IdentifierInfo *Id, 2170 bool Invalid = false); 2171 2172 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2173 2174 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2175 Decl *Parm, Stmt *Body); 2176 2177 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2178 2179 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2180 MultiStmtArg Catch, Stmt *Finally); 2181 2182 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2183 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2184 Scope *CurScope); 2185 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, 2186 Expr *operand); 2187 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2188 Expr *SynchExpr, 2189 Stmt *SynchBody); 2190 2191 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2192 2193 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2194 SourceLocation StartLoc, 2195 SourceLocation IdLoc, 2196 IdentifierInfo *Id); 2197 2198 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2199 2200 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2201 Decl *ExDecl, Stmt *HandlerBlock); 2202 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2203 MultiStmtArg Handlers); 2204 2205 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2206 SourceLocation TryLoc, 2207 Stmt *TryBlock, 2208 Stmt *Handler); 2209 2210 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2211 Expr *FilterExpr, 2212 Stmt *Block); 2213 2214 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2215 Stmt *Block); 2216 2217 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2218 2219 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2220 2221 /// \brief If it's a file scoped decl that must warn if not used, keep track 2222 /// of it. 2223 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2224 2225 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2226 /// whose result is unused, warn. 2227 void DiagnoseUnusedExprResult(const Stmt *S); 2228 void DiagnoseUnusedDecl(const NamedDecl *ND); 2229 2230 ParsingDeclState PushParsingDeclaration() { 2231 return DelayedDiagnostics.pushParsingDecl(); 2232 } 2233 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2234 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2235 } 2236 2237 typedef ProcessingContextState ParsingClassState; 2238 ParsingClassState PushParsingClass() { 2239 return DelayedDiagnostics.pushContext(); 2240 } 2241 void PopParsingClass(ParsingClassState state) { 2242 DelayedDiagnostics.popContext(state); 2243 } 2244 2245 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2246 SourceLocation Loc, 2247 const ObjCInterfaceDecl *UnknownObjCClass=0); 2248 2249 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2250 2251 bool makeUnavailableInSystemHeader(SourceLocation loc, 2252 StringRef message); 2253 2254 //===--------------------------------------------------------------------===// 2255 // Expression Parsing Callbacks: SemaExpr.cpp. 2256 2257 bool CanUseDecl(NamedDecl *D); 2258 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2259 const ObjCInterfaceDecl *UnknownObjCClass=0); 2260 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2261 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2262 ObjCMethodDecl *Getter, 2263 SourceLocation Loc); 2264 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2265 Expr **Args, unsigned NumArgs); 2266 2267 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 2268 2269 void PopExpressionEvaluationContext(); 2270 2271 void DiscardCleanupsInEvaluationContext(); 2272 2273 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 2274 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2275 void MarkDeclarationsReferencedInExpr(Expr *E); 2276 2277 /// \brief Figure out if an expression could be turned into a call. 2278 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2279 UnresolvedSetImpl &NonTemplateOverloads); 2280 /// \brief Give notes for a set of overloads. 2281 void NoteOverloads(const UnresolvedSetImpl &Overloads, 2282 const SourceLocation FinalNoteLoc); 2283 2284 /// \brief Conditionally issue a diagnostic based on the current 2285 /// evaluation context. 2286 /// 2287 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2288 /// the function body is parsed, and then do a basic reachability analysis to 2289 /// determine if the statement is reachable. If it is unreachable, the 2290 /// diagnostic will not be emitted. 2291 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement, 2292 const PartialDiagnostic &PD); 2293 2294 // Primary Expressions. 2295 SourceRange getExprRange(Expr *E) const; 2296 2297 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Id, 2298 bool HasTrailingLParen, bool IsAddressOfOperand); 2299 2300 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2301 TemplateArgumentListInfo &Buffer, 2302 DeclarationNameInfo &NameInfo, 2303 const TemplateArgumentListInfo *&TemplateArgs); 2304 2305 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2306 CorrectTypoContext CTC = CTC_Unknown, 2307 TemplateArgumentListInfo *ExplicitTemplateArgs = 0, 2308 Expr **Args = 0, unsigned NumArgs = 0); 2309 2310 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S, 2311 IdentifierInfo *II, 2312 bool AllowBuiltinCreation=false); 2313 2314 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2315 const DeclarationNameInfo &NameInfo, 2316 bool isAddressOfOperand, 2317 const TemplateArgumentListInfo *TemplateArgs); 2318 2319 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2320 ExprValueKind VK, 2321 SourceLocation Loc, 2322 const CXXScopeSpec *SS = 0); 2323 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2324 ExprValueKind VK, 2325 const DeclarationNameInfo &NameInfo, 2326 const CXXScopeSpec *SS = 0); 2327 ExprResult 2328 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2329 SourceLocation nameLoc, 2330 IndirectFieldDecl *indirectField, 2331 Expr *baseObjectExpr = 0, 2332 SourceLocation opLoc = SourceLocation()); 2333 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2334 LookupResult &R, 2335 const TemplateArgumentListInfo *TemplateArgs); 2336 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2337 LookupResult &R, 2338 const TemplateArgumentListInfo *TemplateArgs, 2339 bool IsDefiniteInstance); 2340 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2341 const LookupResult &R, 2342 bool HasTrailingLParen); 2343 2344 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2345 const DeclarationNameInfo &NameInfo); 2346 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2347 const DeclarationNameInfo &NameInfo, 2348 const TemplateArgumentListInfo *TemplateArgs); 2349 2350 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2351 LookupResult &R, 2352 bool NeedsADL); 2353 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2354 const DeclarationNameInfo &NameInfo, 2355 NamedDecl *D); 2356 2357 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2358 ExprResult ActOnNumericConstant(const Token &Tok); 2359 ExprResult ActOnCharacterConstant(const Token &Tok); 2360 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E); 2361 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2362 SourceLocation R, 2363 MultiExprArg Val); 2364 2365 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2366 /// fragments (e.g. "foo" "bar" L"baz"). 2367 ExprResult ActOnStringLiteral(const Token *StringToks, 2368 unsigned NumStringToks); 2369 2370 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2371 SourceLocation DefaultLoc, 2372 SourceLocation RParenLoc, 2373 Expr *ControllingExpr, 2374 MultiTypeArg ArgTypes, 2375 MultiExprArg ArgExprs); 2376 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2377 SourceLocation DefaultLoc, 2378 SourceLocation RParenLoc, 2379 Expr *ControllingExpr, 2380 TypeSourceInfo **Types, 2381 Expr **Exprs, 2382 unsigned NumAssocs); 2383 2384 // Binary/Unary Operators. 'Tok' is the token for the operator. 2385 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2386 Expr *InputExpr); 2387 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2388 UnaryOperatorKind Opc, Expr *Input); 2389 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2390 tok::TokenKind Op, Expr *Input); 2391 2392 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo, 2393 SourceLocation OpLoc, 2394 UnaryExprOrTypeTrait ExprKind, 2395 SourceRange R); 2396 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2397 UnaryExprOrTypeTrait ExprKind); 2398 ExprResult 2399 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2400 UnaryExprOrTypeTrait ExprKind, 2401 bool IsType, void *TyOrEx, 2402 const SourceRange &ArgRange); 2403 2404 ExprResult CheckPlaceholderExpr(Expr *E); 2405 bool CheckVecStepExpr(Expr *E); 2406 2407 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2408 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc, 2409 SourceRange ExprRange, 2410 UnaryExprOrTypeTrait ExprKind); 2411 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2412 SourceLocation OpLoc, 2413 IdentifierInfo &Name, 2414 SourceLocation NameLoc, 2415 SourceLocation RParenLoc); 2416 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2417 tok::TokenKind Kind, Expr *Input); 2418 2419 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2420 Expr *Idx, SourceLocation RLoc); 2421 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2422 Expr *Idx, SourceLocation RLoc); 2423 2424 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2425 SourceLocation OpLoc, bool IsArrow, 2426 CXXScopeSpec &SS, 2427 NamedDecl *FirstQualifierInScope, 2428 const DeclarationNameInfo &NameInfo, 2429 const TemplateArgumentListInfo *TemplateArgs); 2430 2431 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2432 SourceLocation OpLoc, bool IsArrow, 2433 const CXXScopeSpec &SS, 2434 NamedDecl *FirstQualifierInScope, 2435 LookupResult &R, 2436 const TemplateArgumentListInfo *TemplateArgs, 2437 bool SuppressQualifierCheck = false); 2438 2439 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2440 bool &IsArrow, SourceLocation OpLoc, 2441 CXXScopeSpec &SS, 2442 Decl *ObjCImpDecl, 2443 bool HasTemplateArgs); 2444 2445 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2446 const CXXScopeSpec &SS, 2447 const LookupResult &R); 2448 2449 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2450 bool IsArrow, SourceLocation OpLoc, 2451 const CXXScopeSpec &SS, 2452 NamedDecl *FirstQualifierInScope, 2453 const DeclarationNameInfo &NameInfo, 2454 const TemplateArgumentListInfo *TemplateArgs); 2455 2456 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2457 SourceLocation OpLoc, 2458 tok::TokenKind OpKind, 2459 CXXScopeSpec &SS, 2460 UnqualifiedId &Member, 2461 Decl *ObjCImpDecl, 2462 bool HasTrailingLParen); 2463 2464 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2465 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2466 FunctionDecl *FDecl, 2467 const FunctionProtoType *Proto, 2468 Expr **Args, unsigned NumArgs, 2469 SourceLocation RParenLoc, 2470 bool ExecConfig = false); 2471 2472 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2473 /// This provides the location of the left/right parens and a list of comma 2474 /// locations. 2475 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2476 MultiExprArg ArgExprs, SourceLocation RParenLoc, 2477 Expr *ExecConfig = 0, bool IsExecConfig = false); 2478 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2479 SourceLocation LParenLoc, 2480 Expr **Args, unsigned NumArgs, 2481 SourceLocation RParenLoc, 2482 Expr *Config = 0, 2483 bool IsExecConfig = false); 2484 2485 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2486 MultiExprArg ExecConfig, 2487 SourceLocation GGGLoc); 2488 2489 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2490 Declarator &D, ParsedType &Ty, 2491 SourceLocation RParenLoc, Expr *CastExpr); 2492 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2493 TypeSourceInfo *Ty, 2494 SourceLocation RParenLoc, 2495 Expr *Op); 2496 CastKind PrepareScalarCast(ExprResult &src, QualType destType); 2497 2498 /// \brief Build an altivec or OpenCL literal. 2499 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2500 SourceLocation RParenLoc, Expr *E, 2501 TypeSourceInfo *TInfo); 2502 2503 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2504 2505 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2506 ParsedType Ty, 2507 SourceLocation RParenLoc, 2508 Expr *InitExpr); 2509 2510 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2511 TypeSourceInfo *TInfo, 2512 SourceLocation RParenLoc, 2513 Expr *LiteralExpr); 2514 2515 ExprResult ActOnInitList(SourceLocation LBraceLoc, 2516 MultiExprArg InitArgList, 2517 SourceLocation RBraceLoc); 2518 2519 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2520 SourceLocation Loc, 2521 bool GNUSyntax, 2522 ExprResult Init); 2523 2524 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2525 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr); 2526 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2527 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr); 2528 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc, 2529 Expr *LHSExpr, Expr *RHSExpr); 2530 2531 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2532 /// in the case of a the GNU conditional expr extension. 2533 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2534 SourceLocation ColonLoc, 2535 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr); 2536 2537 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2538 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2539 LabelDecl *TheDecl); 2540 2541 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2542 SourceLocation RPLoc); // "({..})" 2543 2544 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2545 struct OffsetOfComponent { 2546 SourceLocation LocStart, LocEnd; 2547 bool isBrackets; // true if [expr], false if .ident 2548 union { 2549 IdentifierInfo *IdentInfo; 2550 Expr *E; 2551 } U; 2552 }; 2553 2554 /// __builtin_offsetof(type, a.b[123][456].c) 2555 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2556 TypeSourceInfo *TInfo, 2557 OffsetOfComponent *CompPtr, 2558 unsigned NumComponents, 2559 SourceLocation RParenLoc); 2560 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2561 SourceLocation BuiltinLoc, 2562 SourceLocation TypeLoc, 2563 ParsedType ParsedArgTy, 2564 OffsetOfComponent *CompPtr, 2565 unsigned NumComponents, 2566 SourceLocation RParenLoc); 2567 2568 // __builtin_choose_expr(constExpr, expr1, expr2) 2569 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2570 Expr *CondExpr, Expr *LHSExpr, 2571 Expr *RHSExpr, SourceLocation RPLoc); 2572 2573 // __builtin_va_arg(expr, type) 2574 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, 2575 SourceLocation RPLoc); 2576 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E, 2577 TypeSourceInfo *TInfo, SourceLocation RPLoc); 2578 2579 // __null 2580 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2581 2582 bool CheckCaseExpression(Expr *E); 2583 2584 bool CheckMicrosoftIfExistsSymbol(CXXScopeSpec &SS, UnqualifiedId &Name); 2585 2586 //===------------------------- "Block" Extension ------------------------===// 2587 2588 /// ActOnBlockStart - This callback is invoked when a block literal is 2589 /// started. 2590 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2591 2592 /// ActOnBlockArguments - This callback allows processing of block arguments. 2593 /// If there are no arguments, this is still invoked. 2594 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2595 2596 /// ActOnBlockError - If there is an error parsing a block, this callback 2597 /// is invoked to pop the information about the block from the action impl. 2598 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2599 2600 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2601 /// literal was successfully completed. ^(int x){...} 2602 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body, 2603 Scope *CurScope); 2604 2605 //===---------------------------- OpenCL Features -----------------------===// 2606 2607 /// __builtin_astype(...) 2608 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, 2609 SourceLocation BuiltinLoc, 2610 SourceLocation RParenLoc); 2611 2612 //===---------------------------- C++ Features --------------------------===// 2613 2614 // Act on C++ namespaces 2615 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2616 SourceLocation NamespaceLoc, 2617 SourceLocation IdentLoc, 2618 IdentifierInfo *Ident, 2619 SourceLocation LBrace, 2620 AttributeList *AttrList); 2621 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2622 2623 NamespaceDecl *getStdNamespace() const; 2624 NamespaceDecl *getOrCreateStdNamespace(); 2625 2626 CXXRecordDecl *getStdBadAlloc() const; 2627 2628 Decl *ActOnUsingDirective(Scope *CurScope, 2629 SourceLocation UsingLoc, 2630 SourceLocation NamespcLoc, 2631 CXXScopeSpec &SS, 2632 SourceLocation IdentLoc, 2633 IdentifierInfo *NamespcName, 2634 AttributeList *AttrList); 2635 2636 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2637 2638 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2639 SourceLocation NamespaceLoc, 2640 SourceLocation AliasLoc, 2641 IdentifierInfo *Alias, 2642 CXXScopeSpec &SS, 2643 SourceLocation IdentLoc, 2644 IdentifierInfo *Ident); 2645 2646 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2647 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2648 const LookupResult &PreviousDecls); 2649 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2650 NamedDecl *Target); 2651 2652 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2653 bool isTypeName, 2654 const CXXScopeSpec &SS, 2655 SourceLocation NameLoc, 2656 const LookupResult &Previous); 2657 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2658 const CXXScopeSpec &SS, 2659 SourceLocation NameLoc); 2660 2661 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2662 SourceLocation UsingLoc, 2663 CXXScopeSpec &SS, 2664 const DeclarationNameInfo &NameInfo, 2665 AttributeList *AttrList, 2666 bool IsInstantiation, 2667 bool IsTypeName, 2668 SourceLocation TypenameLoc); 2669 2670 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2671 2672 Decl *ActOnUsingDeclaration(Scope *CurScope, 2673 AccessSpecifier AS, 2674 bool HasUsingKeyword, 2675 SourceLocation UsingLoc, 2676 CXXScopeSpec &SS, 2677 UnqualifiedId &Name, 2678 AttributeList *AttrList, 2679 bool IsTypeName, 2680 SourceLocation TypenameLoc); 2681 Decl *ActOnAliasDeclaration(Scope *CurScope, 2682 AccessSpecifier AS, 2683 MultiTemplateParamsArg TemplateParams, 2684 SourceLocation UsingLoc, 2685 UnqualifiedId &Name, 2686 TypeResult Type); 2687 2688 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2689 /// ActOnDeclarator, when a C++ direct initializer is present. 2690 /// e.g: "int x(1);" 2691 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2692 SourceLocation LParenLoc, 2693 MultiExprArg Exprs, 2694 SourceLocation RParenLoc, 2695 bool TypeMayContainAuto); 2696 2697 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2698 /// and sets it as the initializer for the the passed in VarDecl. 2699 bool InitializeVarWithConstructor(VarDecl *VD, 2700 CXXConstructorDecl *Constructor, 2701 MultiExprArg Exprs, 2702 bool HadMultipleCandidates); 2703 2704 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2705 /// including handling of its default argument expressions. 2706 /// 2707 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2708 ExprResult 2709 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2710 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2711 bool HadMultipleCandidates, bool RequiresZeroInit, 2712 unsigned ConstructKind, SourceRange ParenRange); 2713 2714 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2715 // the constructor can be elidable? 2716 ExprResult 2717 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2718 CXXConstructorDecl *Constructor, bool Elidable, 2719 MultiExprArg Exprs, bool HadMultipleCandidates, 2720 bool RequiresZeroInit, unsigned ConstructKind, 2721 SourceRange ParenRange); 2722 2723 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2724 /// the default expr if needed. 2725 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2726 FunctionDecl *FD, 2727 ParmVarDecl *Param); 2728 2729 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2730 /// constructed variable. 2731 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2732 2733 /// \brief Helper class that collects exception specifications for 2734 /// implicitly-declared special member functions. 2735 class ImplicitExceptionSpecification { 2736 // Pointer to allow copying 2737 ASTContext *Context; 2738 // We order exception specifications thus: 2739 // noexcept is the most restrictive, but is only used in C++0x. 2740 // throw() comes next. 2741 // Then a throw(collected exceptions) 2742 // Finally no specification. 2743 // throw(...) is used instead if any called function uses it. 2744 // 2745 // If this exception specification cannot be known yet (for instance, 2746 // because this is the exception specification for a defaulted default 2747 // constructor and we haven't finished parsing the deferred parts of the 2748 // class yet), the C++0x standard does not specify how to behave. We 2749 // record this as an 'unknown' exception specification, which overrules 2750 // any other specification (even 'none', to keep this rule simple). 2751 ExceptionSpecificationType ComputedEST; 2752 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2753 SmallVector<QualType, 4> Exceptions; 2754 2755 void ClearExceptions() { 2756 ExceptionsSeen.clear(); 2757 Exceptions.clear(); 2758 } 2759 2760 public: 2761 explicit ImplicitExceptionSpecification(ASTContext &Context) 2762 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2763 if (!Context.getLangOptions().CPlusPlus0x) 2764 ComputedEST = EST_DynamicNone; 2765 } 2766 2767 /// \brief Get the computed exception specification type. 2768 ExceptionSpecificationType getExceptionSpecType() const { 2769 assert(ComputedEST != EST_ComputedNoexcept && 2770 "noexcept(expr) should not be a possible result"); 2771 return ComputedEST; 2772 } 2773 2774 /// \brief The number of exceptions in the exception specification. 2775 unsigned size() const { return Exceptions.size(); } 2776 2777 /// \brief The set of exceptions in the exception specification. 2778 const QualType *data() const { return Exceptions.data(); } 2779 2780 /// \brief Integrate another called method into the collected data. 2781 void CalledDecl(CXXMethodDecl *Method); 2782 2783 /// \brief Integrate an invoked expression into the collected data. 2784 void CalledExpr(Expr *E); 2785 2786 /// \brief Specify that the exception specification can't be detemined yet. 2787 void SetDelayed() { 2788 ClearExceptions(); 2789 ComputedEST = EST_Delayed; 2790 } 2791 2792 FunctionProtoType::ExtProtoInfo getEPI() const { 2793 FunctionProtoType::ExtProtoInfo EPI; 2794 EPI.ExceptionSpecType = getExceptionSpecType(); 2795 EPI.NumExceptions = size(); 2796 EPI.Exceptions = data(); 2797 return EPI; 2798 } 2799 }; 2800 2801 /// \brief Determine what sort of exception specification a defaulted 2802 /// copy constructor of a class will have. 2803 ImplicitExceptionSpecification 2804 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2805 2806 /// \brief Determine what sort of exception specification a defaulted 2807 /// default constructor of a class will have, and whether the parameter 2808 /// will be const. 2809 std::pair<ImplicitExceptionSpecification, bool> 2810 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2811 2812 /// \brief Determine what sort of exception specification a defautled 2813 /// copy assignment operator of a class will have, and whether the 2814 /// parameter will be const. 2815 std::pair<ImplicitExceptionSpecification, bool> 2816 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2817 2818 /// \brief Determine what sort of exception specification a defaulted move 2819 /// constructor of a class will have. 2820 ImplicitExceptionSpecification 2821 ComputeDefaultedMoveCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2822 2823 /// \brief Determine what sort of exception specification a defaulted move 2824 /// assignment operator of a class will have. 2825 ImplicitExceptionSpecification 2826 ComputeDefaultedMoveAssignmentExceptionSpec(CXXRecordDecl *ClassDecl); 2827 2828 /// \brief Determine what sort of exception specification a defaulted 2829 /// destructor of a class will have. 2830 ImplicitExceptionSpecification 2831 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 2832 2833 /// \brief Determine if a special member function should have a deleted 2834 /// definition when it is defaulted. 2835 bool ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM); 2836 2837 /// \brief Determine if a defaulted copy constructor ought to be 2838 /// deleted. 2839 bool ShouldDeleteCopyConstructor(CXXConstructorDecl *CD); 2840 2841 /// \brief Determine if a defaulted copy assignment operator ought to be 2842 /// deleted. 2843 bool ShouldDeleteCopyAssignmentOperator(CXXMethodDecl *MD); 2844 2845 /// \brief Determine if a defaulted move constructor ought to be deleted. 2846 bool ShouldDeleteMoveConstructor(CXXConstructorDecl *CD); 2847 2848 /// \brief Determine if a defaulted move assignment operator ought to be 2849 /// deleted. 2850 bool ShouldDeleteMoveAssignmentOperator(CXXMethodDecl *MD); 2851 2852 /// \brief Determine if a defaulted destructor ought to be deleted. 2853 bool ShouldDeleteDestructor(CXXDestructorDecl *DD); 2854 2855 /// \brief Declare the implicit default constructor for the given class. 2856 /// 2857 /// \param ClassDecl The class declaration into which the implicit 2858 /// default constructor will be added. 2859 /// 2860 /// \returns The implicitly-declared default constructor. 2861 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2862 CXXRecordDecl *ClassDecl); 2863 2864 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2865 /// defining this constructor as the default constructor. 2866 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2867 CXXConstructorDecl *Constructor); 2868 2869 /// \brief Declare the implicit destructor for the given class. 2870 /// 2871 /// \param ClassDecl The class declaration into which the implicit 2872 /// destructor will be added. 2873 /// 2874 /// \returns The implicitly-declared destructor. 2875 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2876 2877 /// DefineImplicitDestructor - Checks for feasibility of 2878 /// defining this destructor as the default destructor. 2879 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2880 CXXDestructorDecl *Destructor); 2881 2882 /// \brief Build an exception spec for destructors that don't have one. 2883 /// 2884 /// C++11 says that user-defined destructors with no exception spec get one 2885 /// that looks as if the destructor was implicitly declared. 2886 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 2887 CXXDestructorDecl *Destructor); 2888 2889 /// \brief Declare all inherited constructors for the given class. 2890 /// 2891 /// \param ClassDecl The class declaration into which the inherited 2892 /// constructors will be added. 2893 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2894 2895 /// \brief Declare the implicit copy constructor for the given class. 2896 /// 2897 /// \param ClassDecl The class declaration into which the implicit 2898 /// copy constructor will be added. 2899 /// 2900 /// \returns The implicitly-declared copy constructor. 2901 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2902 2903 /// DefineImplicitCopyConstructor - Checks for feasibility of 2904 /// defining this constructor as the copy constructor. 2905 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2906 CXXConstructorDecl *Constructor); 2907 2908 /// \brief Declare the implicit move constructor for the given class. 2909 /// 2910 /// \param ClassDecl The Class declaration into which the implicit 2911 /// move constructor will be added. 2912 /// 2913 /// \returns The implicitly-declared move constructor, or NULL if it wasn't 2914 /// declared. 2915 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl); 2916 2917 /// DefineImplicitMoveConstructor - Checks for feasibility of 2918 /// defining this constructor as the move constructor. 2919 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation, 2920 CXXConstructorDecl *Constructor); 2921 2922 /// \brief Declare the implicit copy assignment operator for the given class. 2923 /// 2924 /// \param ClassDecl The class declaration into which the implicit 2925 /// copy assignment operator will be added. 2926 /// 2927 /// \returns The implicitly-declared copy assignment operator. 2928 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2929 2930 /// \brief Defines an implicitly-declared copy assignment operator. 2931 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2932 CXXMethodDecl *MethodDecl); 2933 2934 /// \brief Declare the implicit move assignment operator for the given class. 2935 /// 2936 /// \param ClassDecl The Class declaration into which the implicit 2937 /// move assignment operator will be added. 2938 /// 2939 /// \returns The implicitly-declared move assignment operator, or NULL if it 2940 /// wasn't declared. 2941 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl); 2942 2943 /// \brief Defines an implicitly-declared move assignment operator. 2944 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation, 2945 CXXMethodDecl *MethodDecl); 2946 2947 /// \brief Force the declaration of any implicitly-declared members of this 2948 /// class. 2949 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2950 2951 /// MaybeBindToTemporary - If the passed in expression has a record type with 2952 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 2953 /// it simply returns the passed in expression. 2954 ExprResult MaybeBindToTemporary(Expr *E); 2955 2956 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 2957 MultiExprArg ArgsPtr, 2958 SourceLocation Loc, 2959 ASTOwningVector<Expr*> &ConvertedArgs); 2960 2961 ParsedType getDestructorName(SourceLocation TildeLoc, 2962 IdentifierInfo &II, SourceLocation NameLoc, 2963 Scope *S, CXXScopeSpec &SS, 2964 ParsedType ObjectType, 2965 bool EnteringContext); 2966 2967 // Checks that reinterpret casts don't have undefined behavior. 2968 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 2969 bool IsDereference, SourceRange Range); 2970 2971 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 2972 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 2973 tok::TokenKind Kind, 2974 SourceLocation LAngleBracketLoc, 2975 Declarator &D, 2976 SourceLocation RAngleBracketLoc, 2977 SourceLocation LParenLoc, 2978 Expr *E, 2979 SourceLocation RParenLoc); 2980 2981 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 2982 tok::TokenKind Kind, 2983 TypeSourceInfo *Ty, 2984 Expr *E, 2985 SourceRange AngleBrackets, 2986 SourceRange Parens); 2987 2988 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2989 SourceLocation TypeidLoc, 2990 TypeSourceInfo *Operand, 2991 SourceLocation RParenLoc); 2992 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2993 SourceLocation TypeidLoc, 2994 Expr *Operand, 2995 SourceLocation RParenLoc); 2996 2997 /// ActOnCXXTypeid - Parse typeid( something ). 2998 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 2999 SourceLocation LParenLoc, bool isType, 3000 void *TyOrExpr, 3001 SourceLocation RParenLoc); 3002 3003 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3004 SourceLocation TypeidLoc, 3005 TypeSourceInfo *Operand, 3006 SourceLocation RParenLoc); 3007 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3008 SourceLocation TypeidLoc, 3009 Expr *Operand, 3010 SourceLocation RParenLoc); 3011 3012 /// ActOnCXXUuidof - Parse __uuidof( something ). 3013 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 3014 SourceLocation LParenLoc, bool isType, 3015 void *TyOrExpr, 3016 SourceLocation RParenLoc); 3017 3018 3019 //// ActOnCXXThis - Parse 'this' pointer. 3020 ExprResult ActOnCXXThis(SourceLocation loc); 3021 3022 /// getAndCaptureCurrentThisType - Try to capture a 'this' pointer. Returns 3023 /// the type of the 'this' pointer, or a null type if this is not possible. 3024 QualType getAndCaptureCurrentThisType(); 3025 3026 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 3027 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 3028 3029 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 3030 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 3031 3032 //// ActOnCXXThrow - Parse throw expressions. 3033 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 3034 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 3035 bool IsThrownVarInScope); 3036 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 3037 bool IsThrownVarInScope); 3038 3039 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 3040 /// Can be interpreted either as function-style casting ("int(x)") 3041 /// or class type construction ("ClassType(x,y,z)") 3042 /// or creation of a value-initialized type ("int()"). 3043 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 3044 SourceLocation LParenLoc, 3045 MultiExprArg Exprs, 3046 SourceLocation RParenLoc); 3047 3048 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 3049 SourceLocation LParenLoc, 3050 MultiExprArg Exprs, 3051 SourceLocation RParenLoc); 3052 3053 /// ActOnCXXNew - Parsed a C++ 'new' expression. 3054 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 3055 SourceLocation PlacementLParen, 3056 MultiExprArg PlacementArgs, 3057 SourceLocation PlacementRParen, 3058 SourceRange TypeIdParens, Declarator &D, 3059 SourceLocation ConstructorLParen, 3060 MultiExprArg ConstructorArgs, 3061 SourceLocation ConstructorRParen); 3062 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 3063 SourceLocation PlacementLParen, 3064 MultiExprArg PlacementArgs, 3065 SourceLocation PlacementRParen, 3066 SourceRange TypeIdParens, 3067 QualType AllocType, 3068 TypeSourceInfo *AllocTypeInfo, 3069 Expr *ArraySize, 3070 SourceLocation ConstructorLParen, 3071 MultiExprArg ConstructorArgs, 3072 SourceLocation ConstructorRParen, 3073 bool TypeMayContainAuto = true); 3074 3075 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 3076 SourceRange R); 3077 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 3078 bool UseGlobal, QualType AllocType, bool IsArray, 3079 Expr **PlaceArgs, unsigned NumPlaceArgs, 3080 FunctionDecl *&OperatorNew, 3081 FunctionDecl *&OperatorDelete); 3082 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 3083 DeclarationName Name, Expr** Args, 3084 unsigned NumArgs, DeclContext *Ctx, 3085 bool AllowMissing, FunctionDecl *&Operator, 3086 bool Diagnose = true); 3087 void DeclareGlobalNewDelete(); 3088 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 3089 QualType Argument, 3090 bool addMallocAttr = false); 3091 3092 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 3093 DeclarationName Name, FunctionDecl* &Operator, 3094 bool Diagnose = true); 3095 3096 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 3097 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 3098 bool UseGlobal, bool ArrayForm, 3099 Expr *Operand); 3100 3101 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 3102 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 3103 SourceLocation StmtLoc, 3104 bool ConvertToBoolean); 3105 3106 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 3107 Expr *Operand, SourceLocation RParen); 3108 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 3109 SourceLocation RParen); 3110 3111 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 3112 /// pseudo-functions. 3113 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 3114 SourceLocation KWLoc, 3115 ParsedType Ty, 3116 SourceLocation RParen); 3117 3118 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3119 SourceLocation KWLoc, 3120 TypeSourceInfo *T, 3121 SourceLocation RParen); 3122 3123 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3124 /// pseudo-functions. 3125 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3126 SourceLocation KWLoc, 3127 ParsedType LhsTy, 3128 ParsedType RhsTy, 3129 SourceLocation RParen); 3130 3131 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3132 SourceLocation KWLoc, 3133 TypeSourceInfo *LhsT, 3134 TypeSourceInfo *RhsT, 3135 SourceLocation RParen); 3136 3137 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3138 /// pseudo-functions. 3139 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3140 SourceLocation KWLoc, 3141 ParsedType LhsTy, 3142 Expr *DimExpr, 3143 SourceLocation RParen); 3144 3145 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3146 SourceLocation KWLoc, 3147 TypeSourceInfo *TSInfo, 3148 Expr *DimExpr, 3149 SourceLocation RParen); 3150 3151 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3152 /// pseudo-functions. 3153 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3154 SourceLocation KWLoc, 3155 Expr *Queried, 3156 SourceLocation RParen); 3157 3158 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3159 SourceLocation KWLoc, 3160 Expr *Queried, 3161 SourceLocation RParen); 3162 3163 ExprResult ActOnStartCXXMemberReference(Scope *S, 3164 Expr *Base, 3165 SourceLocation OpLoc, 3166 tok::TokenKind OpKind, 3167 ParsedType &ObjectType, 3168 bool &MayBePseudoDestructor); 3169 3170 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3171 3172 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3173 SourceLocation OpLoc, 3174 tok::TokenKind OpKind, 3175 const CXXScopeSpec &SS, 3176 TypeSourceInfo *ScopeType, 3177 SourceLocation CCLoc, 3178 SourceLocation TildeLoc, 3179 PseudoDestructorTypeStorage DestroyedType, 3180 bool HasTrailingLParen); 3181 3182 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3183 SourceLocation OpLoc, 3184 tok::TokenKind OpKind, 3185 CXXScopeSpec &SS, 3186 UnqualifiedId &FirstTypeName, 3187 SourceLocation CCLoc, 3188 SourceLocation TildeLoc, 3189 UnqualifiedId &SecondTypeName, 3190 bool HasTrailingLParen); 3191 3192 /// MaybeCreateExprWithCleanups - If the current full-expression 3193 /// requires any cleanups, surround it with a ExprWithCleanups node. 3194 /// Otherwise, just returns the passed-in expression. 3195 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3196 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3197 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3198 3199 ExprResult ActOnFinishFullExpr(Expr *Expr); 3200 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3201 3202 // Marks SS invalid if it represents an incomplete type. 3203 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3204 3205 DeclContext *computeDeclContext(QualType T); 3206 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3207 bool EnteringContext = false); 3208 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3209 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3210 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3211 3212 /// \brief The parser has parsed a global nested-name-specifier '::'. 3213 /// 3214 /// \param S The scope in which this nested-name-specifier occurs. 3215 /// 3216 /// \param CCLoc The location of the '::'. 3217 /// 3218 /// \param SS The nested-name-specifier, which will be updated in-place 3219 /// to reflect the parsed nested-name-specifier. 3220 /// 3221 /// \returns true if an error occurred, false otherwise. 3222 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3223 CXXScopeSpec &SS); 3224 3225 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3226 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3227 3228 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3229 SourceLocation IdLoc, 3230 IdentifierInfo &II, 3231 ParsedType ObjectType); 3232 3233 bool BuildCXXNestedNameSpecifier(Scope *S, 3234 IdentifierInfo &Identifier, 3235 SourceLocation IdentifierLoc, 3236 SourceLocation CCLoc, 3237 QualType ObjectType, 3238 bool EnteringContext, 3239 CXXScopeSpec &SS, 3240 NamedDecl *ScopeLookupResult, 3241 bool ErrorRecoveryLookup); 3242 3243 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3244 /// 3245 /// \param S The scope in which this nested-name-specifier occurs. 3246 /// 3247 /// \param Identifier The identifier preceding the '::'. 3248 /// 3249 /// \param IdentifierLoc The location of the identifier. 3250 /// 3251 /// \param CCLoc The location of the '::'. 3252 /// 3253 /// \param ObjectType The type of the object, if we're parsing 3254 /// nested-name-specifier in a member access expression. 3255 /// 3256 /// \param EnteringContext Whether we're entering the context nominated by 3257 /// this nested-name-specifier. 3258 /// 3259 /// \param SS The nested-name-specifier, which is both an input 3260 /// parameter (the nested-name-specifier before this type) and an 3261 /// output parameter (containing the full nested-name-specifier, 3262 /// including this new type). 3263 /// 3264 /// \returns true if an error occurred, false otherwise. 3265 bool ActOnCXXNestedNameSpecifier(Scope *S, 3266 IdentifierInfo &Identifier, 3267 SourceLocation IdentifierLoc, 3268 SourceLocation CCLoc, 3269 ParsedType ObjectType, 3270 bool EnteringContext, 3271 CXXScopeSpec &SS); 3272 3273 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3274 IdentifierInfo &Identifier, 3275 SourceLocation IdentifierLoc, 3276 SourceLocation ColonLoc, 3277 ParsedType ObjectType, 3278 bool EnteringContext); 3279 3280 /// \brief The parser has parsed a nested-name-specifier 3281 /// 'template[opt] template-name < template-args >::'. 3282 /// 3283 /// \param S The scope in which this nested-name-specifier occurs. 3284 /// 3285 /// \param TemplateLoc The location of the 'template' keyword, if any. 3286 /// 3287 /// \param SS The nested-name-specifier, which is both an input 3288 /// parameter (the nested-name-specifier before this type) and an 3289 /// output parameter (containing the full nested-name-specifier, 3290 /// including this new type). 3291 /// 3292 /// \param TemplateLoc the location of the 'template' keyword, if any. 3293 /// \param TemplateName The template name. 3294 /// \param TemplateNameLoc The location of the template name. 3295 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3296 /// \param TemplateArgs The template arguments. 3297 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3298 /// \param CCLoc The location of the '::'. 3299 3300 /// \param EnteringContext Whether we're entering the context of the 3301 /// nested-name-specifier. 3302 /// 3303 /// 3304 /// \returns true if an error occurred, false otherwise. 3305 bool ActOnCXXNestedNameSpecifier(Scope *S, 3306 SourceLocation TemplateLoc, 3307 CXXScopeSpec &SS, 3308 TemplateTy Template, 3309 SourceLocation TemplateNameLoc, 3310 SourceLocation LAngleLoc, 3311 ASTTemplateArgsPtr TemplateArgs, 3312 SourceLocation RAngleLoc, 3313 SourceLocation CCLoc, 3314 bool EnteringContext); 3315 3316 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3317 /// that the parser can use later to reconstruct the given 3318 /// nested-name-specifier. 3319 /// 3320 /// \param SS A nested-name-specifier. 3321 /// 3322 /// \returns A pointer containing all of the information in the 3323 /// nested-name-specifier \p SS. 3324 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3325 3326 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3327 /// the nested-name-specifier structure. 3328 /// 3329 /// \param Annotation The annotation pointer, produced by 3330 /// \c SaveNestedNameSpecifierAnnotation(). 3331 /// 3332 /// \param AnnotationRange The source range corresponding to the annotation. 3333 /// 3334 /// \param SS The nested-name-specifier that will be updated with the contents 3335 /// of the annotation pointer. 3336 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3337 SourceRange AnnotationRange, 3338 CXXScopeSpec &SS); 3339 3340 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3341 3342 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3343 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3344 /// After this method is called, according to [C++ 3.4.3p3], names should be 3345 /// looked up in the declarator-id's scope, until the declarator is parsed and 3346 /// ActOnCXXExitDeclaratorScope is called. 3347 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3348 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3349 3350 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3351 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3352 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3353 /// Used to indicate that names should revert to being looked up in the 3354 /// defining scope. 3355 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3356 3357 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3358 /// initializer for the declaration 'Dcl'. 3359 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3360 /// static data member of class X, names should be looked up in the scope of 3361 /// class X. 3362 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3363 3364 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3365 /// initializer for the declaration 'Dcl'. 3366 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3367 3368 // ParseObjCStringLiteral - Parse Objective-C string literals. 3369 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3370 Expr **Strings, 3371 unsigned NumStrings); 3372 3373 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3374 TypeSourceInfo *EncodedTypeInfo, 3375 SourceLocation RParenLoc); 3376 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3377 CXXMethodDecl *Method, 3378 bool HadMultipleCandidates); 3379 3380 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3381 SourceLocation EncodeLoc, 3382 SourceLocation LParenLoc, 3383 ParsedType Ty, 3384 SourceLocation RParenLoc); 3385 3386 // ParseObjCSelectorExpression - Build selector expression for @selector 3387 ExprResult ParseObjCSelectorExpression(Selector Sel, 3388 SourceLocation AtLoc, 3389 SourceLocation SelLoc, 3390 SourceLocation LParenLoc, 3391 SourceLocation RParenLoc); 3392 3393 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3394 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3395 SourceLocation AtLoc, 3396 SourceLocation ProtoLoc, 3397 SourceLocation LParenLoc, 3398 SourceLocation RParenLoc); 3399 3400 //===--------------------------------------------------------------------===// 3401 // C++ Declarations 3402 // 3403 Decl *ActOnStartLinkageSpecification(Scope *S, 3404 SourceLocation ExternLoc, 3405 SourceLocation LangLoc, 3406 StringRef Lang, 3407 SourceLocation LBraceLoc); 3408 Decl *ActOnFinishLinkageSpecification(Scope *S, 3409 Decl *LinkageSpec, 3410 SourceLocation RBraceLoc); 3411 3412 3413 //===--------------------------------------------------------------------===// 3414 // C++ Classes 3415 // 3416 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3417 const CXXScopeSpec *SS = 0); 3418 3419 Decl *ActOnAccessSpecifier(AccessSpecifier Access, 3420 SourceLocation ASLoc, 3421 SourceLocation ColonLoc); 3422 3423 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3424 Declarator &D, 3425 MultiTemplateParamsArg TemplateParameterLists, 3426 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3427 bool HasDeferredInit, bool IsDefinition); 3428 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3429 Expr *Init); 3430 3431 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3432 Scope *S, 3433 CXXScopeSpec &SS, 3434 IdentifierInfo *MemberOrBase, 3435 ParsedType TemplateTypeTy, 3436 SourceLocation IdLoc, 3437 SourceLocation LParenLoc, 3438 Expr **Args, unsigned NumArgs, 3439 SourceLocation RParenLoc, 3440 SourceLocation EllipsisLoc); 3441 3442 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3443 Scope *S, 3444 CXXScopeSpec &SS, 3445 IdentifierInfo *MemberOrBase, 3446 ParsedType TemplateTypeTy, 3447 SourceLocation IdLoc, 3448 Expr *InitList, 3449 SourceLocation EllipsisLoc); 3450 3451 MemInitResult BuildMemInitializer(Decl *ConstructorD, 3452 Scope *S, 3453 CXXScopeSpec &SS, 3454 IdentifierInfo *MemberOrBase, 3455 ParsedType TemplateTypeTy, 3456 SourceLocation IdLoc, 3457 const MultiInitializer &Init, 3458 SourceLocation EllipsisLoc); 3459 3460 MemInitResult BuildMemberInitializer(ValueDecl *Member, 3461 const MultiInitializer &Args, 3462 SourceLocation IdLoc); 3463 3464 MemInitResult BuildBaseInitializer(QualType BaseType, 3465 TypeSourceInfo *BaseTInfo, 3466 const MultiInitializer &Args, 3467 CXXRecordDecl *ClassDecl, 3468 SourceLocation EllipsisLoc); 3469 3470 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3471 const MultiInitializer &Args, 3472 SourceLocation BaseLoc, 3473 CXXRecordDecl *ClassDecl); 3474 3475 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3476 CXXCtorInitializer *Initializer); 3477 3478 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3479 CXXCtorInitializer **Initializers, 3480 unsigned NumInitializers, bool AnyErrors); 3481 3482 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3483 3484 3485 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3486 /// mark all the non-trivial destructors of its members and bases as 3487 /// referenced. 3488 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3489 CXXRecordDecl *Record); 3490 3491 /// \brief The list of classes whose vtables have been used within 3492 /// this translation unit, and the source locations at which the 3493 /// first use occurred. 3494 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3495 3496 /// \brief The list of vtables that are required but have not yet been 3497 /// materialized. 3498 SmallVector<VTableUse, 16> VTableUses; 3499 3500 /// \brief The set of classes whose vtables have been used within 3501 /// this translation unit, and a bit that will be true if the vtable is 3502 /// required to be emitted (otherwise, it should be emitted only if needed 3503 /// by code generation). 3504 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3505 3506 /// \brief Load any externally-stored vtable uses. 3507 void LoadExternalVTableUses(); 3508 3509 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 3510 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 3511 DynamicClassesType; 3512 3513 /// \brief A list of all of the dynamic classes in this translation 3514 /// unit. 3515 DynamicClassesType DynamicClasses; 3516 3517 /// \brief Note that the vtable for the given class was used at the 3518 /// given location. 3519 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3520 bool DefinitionRequired = false); 3521 3522 /// MarkVirtualMembersReferenced - Will mark all members of the given 3523 /// CXXRecordDecl referenced. 3524 void MarkVirtualMembersReferenced(SourceLocation Loc, 3525 const CXXRecordDecl *RD); 3526 3527 /// \brief Define all of the vtables that have been used in this 3528 /// translation unit and reference any virtual members used by those 3529 /// vtables. 3530 /// 3531 /// \returns true if any work was done, false otherwise. 3532 bool DefineUsedVTables(); 3533 3534 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3535 3536 void ActOnMemInitializers(Decl *ConstructorDecl, 3537 SourceLocation ColonLoc, 3538 CXXCtorInitializer **MemInits, 3539 unsigned NumMemInits, 3540 bool AnyErrors); 3541 3542 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3543 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3544 Decl *TagDecl, 3545 SourceLocation LBrac, 3546 SourceLocation RBrac, 3547 AttributeList *AttrList); 3548 3549 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3550 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3551 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3552 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3553 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3554 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3555 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3556 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3557 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3558 bool IsInsideALocalClassWithinATemplateFunction(); 3559 3560 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3561 Expr *AssertExpr, 3562 Expr *AssertMessageExpr, 3563 SourceLocation RParenLoc); 3564 3565 FriendDecl *CheckFriendTypeDecl(SourceLocation FriendLoc, 3566 TypeSourceInfo *TSInfo); 3567 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3568 MultiTemplateParamsArg TemplateParams); 3569 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, bool IsDefinition, 3570 MultiTemplateParamsArg TemplateParams); 3571 3572 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3573 StorageClass& SC); 3574 void CheckConstructor(CXXConstructorDecl *Constructor); 3575 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3576 StorageClass& SC); 3577 bool CheckDestructor(CXXDestructorDecl *Destructor); 3578 void CheckConversionDeclarator(Declarator &D, QualType &R, 3579 StorageClass& SC); 3580 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3581 3582 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3583 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3584 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3585 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3586 void CheckExplicitlyDefaultedMoveConstructor(CXXConstructorDecl *Ctor); 3587 void CheckExplicitlyDefaultedMoveAssignment(CXXMethodDecl *Method); 3588 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3589 3590 //===--------------------------------------------------------------------===// 3591 // C++ Derived Classes 3592 // 3593 3594 /// ActOnBaseSpecifier - Parsed a base specifier 3595 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3596 SourceRange SpecifierRange, 3597 bool Virtual, AccessSpecifier Access, 3598 TypeSourceInfo *TInfo, 3599 SourceLocation EllipsisLoc); 3600 3601 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3602 SourceRange SpecifierRange, 3603 bool Virtual, AccessSpecifier Access, 3604 ParsedType basetype, 3605 SourceLocation BaseLoc, 3606 SourceLocation EllipsisLoc); 3607 3608 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3609 unsigned NumBases); 3610 void ActOnBaseSpecifiers(Decl *ClassDecl, CXXBaseSpecifier **Bases, 3611 unsigned NumBases); 3612 3613 bool IsDerivedFrom(QualType Derived, QualType Base); 3614 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3615 3616 // FIXME: I don't like this name. 3617 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3618 3619 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3620 3621 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3622 SourceLocation Loc, SourceRange Range, 3623 CXXCastPath *BasePath = 0, 3624 bool IgnoreAccess = false); 3625 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3626 unsigned InaccessibleBaseID, 3627 unsigned AmbigiousBaseConvID, 3628 SourceLocation Loc, SourceRange Range, 3629 DeclarationName Name, 3630 CXXCastPath *BasePath); 3631 3632 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3633 3634 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3635 /// covariant, according to C++ [class.virtual]p5. 3636 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3637 const CXXMethodDecl *Old); 3638 3639 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3640 /// spec is a subset of base spec. 3641 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3642 const CXXMethodDecl *Old); 3643 3644 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3645 3646 /// CheckOverrideControl - Check C++0x override control semantics. 3647 void CheckOverrideControl(const Decl *D); 3648 3649 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3650 /// overrides a virtual member function marked 'final', according to 3651 /// C++0x [class.virtual]p3. 3652 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3653 const CXXMethodDecl *Old); 3654 3655 3656 //===--------------------------------------------------------------------===// 3657 // C++ Access Control 3658 // 3659 3660 enum AccessResult { 3661 AR_accessible, 3662 AR_inaccessible, 3663 AR_dependent, 3664 AR_delayed 3665 }; 3666 3667 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3668 NamedDecl *PrevMemberDecl, 3669 AccessSpecifier LexicalAS); 3670 3671 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3672 DeclAccessPair FoundDecl); 3673 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3674 DeclAccessPair FoundDecl); 3675 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3676 SourceRange PlacementRange, 3677 CXXRecordDecl *NamingClass, 3678 DeclAccessPair FoundDecl, 3679 bool Diagnose = true); 3680 AccessResult CheckConstructorAccess(SourceLocation Loc, 3681 CXXConstructorDecl *D, 3682 const InitializedEntity &Entity, 3683 AccessSpecifier Access, 3684 bool IsCopyBindingRefToTemp = false); 3685 AccessResult CheckConstructorAccess(SourceLocation Loc, 3686 CXXConstructorDecl *D, 3687 AccessSpecifier Access, 3688 PartialDiagnostic PD); 3689 AccessResult CheckDestructorAccess(SourceLocation Loc, 3690 CXXDestructorDecl *Dtor, 3691 const PartialDiagnostic &PDiag); 3692 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3693 NamedDecl *D, 3694 const PartialDiagnostic &PDiag); 3695 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3696 Expr *ObjectExpr, 3697 Expr *ArgExpr, 3698 DeclAccessPair FoundDecl); 3699 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3700 DeclAccessPair FoundDecl); 3701 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3702 QualType Base, QualType Derived, 3703 const CXXBasePath &Path, 3704 unsigned DiagID, 3705 bool ForceCheck = false, 3706 bool ForceUnprivileged = false); 3707 void CheckLookupAccess(const LookupResult &R); 3708 bool IsSimplyAccessible(NamedDecl *decl, CXXRecordDecl *Class); 3709 3710 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3711 const MultiLevelTemplateArgumentList &TemplateArgs); 3712 void PerformDependentDiagnostics(const DeclContext *Pattern, 3713 const MultiLevelTemplateArgumentList &TemplateArgs); 3714 3715 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3716 3717 /// A flag to suppress access checking. 3718 bool SuppressAccessChecking; 3719 3720 /// \brief When true, access checking violations are treated as SFINAE 3721 /// failures rather than hard errors. 3722 bool AccessCheckingSFINAE; 3723 3724 void ActOnStartSuppressingAccessChecks(); 3725 void ActOnStopSuppressingAccessChecks(); 3726 3727 enum AbstractDiagSelID { 3728 AbstractNone = -1, 3729 AbstractReturnType, 3730 AbstractParamType, 3731 AbstractVariableType, 3732 AbstractFieldType, 3733 AbstractArrayType 3734 }; 3735 3736 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3737 const PartialDiagnostic &PD); 3738 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3739 3740 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3741 AbstractDiagSelID SelID = AbstractNone); 3742 3743 //===--------------------------------------------------------------------===// 3744 // C++ Overloaded Operators [C++ 13.5] 3745 // 3746 3747 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3748 3749 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3750 3751 //===--------------------------------------------------------------------===// 3752 // C++ Templates [C++ 14] 3753 // 3754 void FilterAcceptableTemplateNames(LookupResult &R); 3755 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3756 3757 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3758 QualType ObjectType, bool EnteringContext, 3759 bool &MemberOfUnknownSpecialization); 3760 3761 TemplateNameKind isTemplateName(Scope *S, 3762 CXXScopeSpec &SS, 3763 bool hasTemplateKeyword, 3764 UnqualifiedId &Name, 3765 ParsedType ObjectType, 3766 bool EnteringContext, 3767 TemplateTy &Template, 3768 bool &MemberOfUnknownSpecialization); 3769 3770 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3771 SourceLocation IILoc, 3772 Scope *S, 3773 const CXXScopeSpec *SS, 3774 TemplateTy &SuggestedTemplate, 3775 TemplateNameKind &SuggestedKind); 3776 3777 bool DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3778 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3779 3780 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3781 SourceLocation EllipsisLoc, 3782 SourceLocation KeyLoc, 3783 IdentifierInfo *ParamName, 3784 SourceLocation ParamNameLoc, 3785 unsigned Depth, unsigned Position, 3786 SourceLocation EqualLoc, 3787 ParsedType DefaultArg); 3788 3789 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3790 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3791 unsigned Depth, 3792 unsigned Position, 3793 SourceLocation EqualLoc, 3794 Expr *DefaultArg); 3795 Decl *ActOnTemplateTemplateParameter(Scope *S, 3796 SourceLocation TmpLoc, 3797 TemplateParameterList *Params, 3798 SourceLocation EllipsisLoc, 3799 IdentifierInfo *ParamName, 3800 SourceLocation ParamNameLoc, 3801 unsigned Depth, 3802 unsigned Position, 3803 SourceLocation EqualLoc, 3804 ParsedTemplateArgument DefaultArg); 3805 3806 TemplateParameterList * 3807 ActOnTemplateParameterList(unsigned Depth, 3808 SourceLocation ExportLoc, 3809 SourceLocation TemplateLoc, 3810 SourceLocation LAngleLoc, 3811 Decl **Params, unsigned NumParams, 3812 SourceLocation RAngleLoc); 3813 3814 /// \brief The context in which we are checking a template parameter 3815 /// list. 3816 enum TemplateParamListContext { 3817 TPC_ClassTemplate, 3818 TPC_FunctionTemplate, 3819 TPC_ClassTemplateMember, 3820 TPC_FriendFunctionTemplate, 3821 TPC_FriendFunctionTemplateDefinition, 3822 TPC_TypeAliasTemplate 3823 }; 3824 3825 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3826 TemplateParameterList *OldParams, 3827 TemplateParamListContext TPC); 3828 TemplateParameterList * 3829 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3830 SourceLocation DeclLoc, 3831 const CXXScopeSpec &SS, 3832 TemplateParameterList **ParamLists, 3833 unsigned NumParamLists, 3834 bool IsFriend, 3835 bool &IsExplicitSpecialization, 3836 bool &Invalid); 3837 3838 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3839 SourceLocation KWLoc, CXXScopeSpec &SS, 3840 IdentifierInfo *Name, SourceLocation NameLoc, 3841 AttributeList *Attr, 3842 TemplateParameterList *TemplateParams, 3843 AccessSpecifier AS, 3844 SourceLocation ModulePrivateLoc, 3845 unsigned NumOuterTemplateParamLists, 3846 TemplateParameterList **OuterTemplateParamLists); 3847 3848 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3849 TemplateArgumentListInfo &Out); 3850 3851 void NoteAllFoundTemplates(TemplateName Name); 3852 3853 QualType CheckTemplateIdType(TemplateName Template, 3854 SourceLocation TemplateLoc, 3855 TemplateArgumentListInfo &TemplateArgs); 3856 3857 TypeResult 3858 ActOnTemplateIdType(CXXScopeSpec &SS, 3859 TemplateTy Template, SourceLocation TemplateLoc, 3860 SourceLocation LAngleLoc, 3861 ASTTemplateArgsPtr TemplateArgs, 3862 SourceLocation RAngleLoc); 3863 3864 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3865 /// such as \c class T::template apply<U>. 3866 /// 3867 /// \param TUK 3868 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3869 TypeSpecifierType TagSpec, 3870 SourceLocation TagLoc, 3871 CXXScopeSpec &SS, 3872 TemplateTy TemplateD, 3873 SourceLocation TemplateLoc, 3874 SourceLocation LAngleLoc, 3875 ASTTemplateArgsPtr TemplateArgsIn, 3876 SourceLocation RAngleLoc); 3877 3878 3879 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3880 LookupResult &R, 3881 bool RequiresADL, 3882 const TemplateArgumentListInfo &TemplateArgs); 3883 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3884 const DeclarationNameInfo &NameInfo, 3885 const TemplateArgumentListInfo &TemplateArgs); 3886 3887 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3888 SourceLocation TemplateKWLoc, 3889 CXXScopeSpec &SS, 3890 UnqualifiedId &Name, 3891 ParsedType ObjectType, 3892 bool EnteringContext, 3893 TemplateTy &Template); 3894 3895 DeclResult 3896 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3897 SourceLocation KWLoc, 3898 SourceLocation ModulePrivateLoc, 3899 CXXScopeSpec &SS, 3900 TemplateTy Template, 3901 SourceLocation TemplateNameLoc, 3902 SourceLocation LAngleLoc, 3903 ASTTemplateArgsPtr TemplateArgs, 3904 SourceLocation RAngleLoc, 3905 AttributeList *Attr, 3906 MultiTemplateParamsArg TemplateParameterLists); 3907 3908 Decl *ActOnTemplateDeclarator(Scope *S, 3909 MultiTemplateParamsArg TemplateParameterLists, 3910 Declarator &D); 3911 3912 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3913 MultiTemplateParamsArg TemplateParameterLists, 3914 Declarator &D); 3915 3916 bool 3917 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3918 TemplateSpecializationKind NewTSK, 3919 NamedDecl *PrevDecl, 3920 TemplateSpecializationKind PrevTSK, 3921 SourceLocation PrevPtOfInstantiation, 3922 bool &SuppressNew); 3923 3924 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3925 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3926 LookupResult &Previous); 3927 3928 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 3929 TemplateArgumentListInfo *ExplicitTemplateArgs, 3930 LookupResult &Previous); 3931 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 3932 3933 DeclResult 3934 ActOnExplicitInstantiation(Scope *S, 3935 SourceLocation ExternLoc, 3936 SourceLocation TemplateLoc, 3937 unsigned TagSpec, 3938 SourceLocation KWLoc, 3939 const CXXScopeSpec &SS, 3940 TemplateTy Template, 3941 SourceLocation TemplateNameLoc, 3942 SourceLocation LAngleLoc, 3943 ASTTemplateArgsPtr TemplateArgs, 3944 SourceLocation RAngleLoc, 3945 AttributeList *Attr); 3946 3947 DeclResult 3948 ActOnExplicitInstantiation(Scope *S, 3949 SourceLocation ExternLoc, 3950 SourceLocation TemplateLoc, 3951 unsigned TagSpec, 3952 SourceLocation KWLoc, 3953 CXXScopeSpec &SS, 3954 IdentifierInfo *Name, 3955 SourceLocation NameLoc, 3956 AttributeList *Attr); 3957 3958 DeclResult ActOnExplicitInstantiation(Scope *S, 3959 SourceLocation ExternLoc, 3960 SourceLocation TemplateLoc, 3961 Declarator &D); 3962 3963 TemplateArgumentLoc 3964 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 3965 SourceLocation TemplateLoc, 3966 SourceLocation RAngleLoc, 3967 Decl *Param, 3968 SmallVectorImpl<TemplateArgument> &Converted); 3969 3970 /// \brief Specifies the context in which a particular template 3971 /// argument is being checked. 3972 enum CheckTemplateArgumentKind { 3973 /// \brief The template argument was specified in the code or was 3974 /// instantiated with some deduced template arguments. 3975 CTAK_Specified, 3976 3977 /// \brief The template argument was deduced via template argument 3978 /// deduction. 3979 CTAK_Deduced, 3980 3981 /// \brief The template argument was deduced from an array bound 3982 /// via template argument deduction. 3983 CTAK_DeducedFromArrayBound 3984 }; 3985 3986 bool CheckTemplateArgument(NamedDecl *Param, 3987 const TemplateArgumentLoc &Arg, 3988 NamedDecl *Template, 3989 SourceLocation TemplateLoc, 3990 SourceLocation RAngleLoc, 3991 unsigned ArgumentPackIndex, 3992 SmallVectorImpl<TemplateArgument> &Converted, 3993 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3994 3995 /// \brief Check that the given template arguments can be be provided to 3996 /// the given template, converting the arguments along the way. 3997 /// 3998 /// \param Template The template to which the template arguments are being 3999 /// provided. 4000 /// 4001 /// \param TemplateLoc The location of the template name in the source. 4002 /// 4003 /// \param TemplateArgs The list of template arguments. If the template is 4004 /// a template template parameter, this function may extend the set of 4005 /// template arguments to also include substituted, defaulted template 4006 /// arguments. 4007 /// 4008 /// \param PartialTemplateArgs True if the list of template arguments is 4009 /// intentionally partial, e.g., because we're checking just the initial 4010 /// set of template arguments. 4011 /// 4012 /// \param Converted Will receive the converted, canonicalized template 4013 /// arguments. 4014 /// 4015 /// \returns True if an error occurred, false otherwise. 4016 bool CheckTemplateArgumentList(TemplateDecl *Template, 4017 SourceLocation TemplateLoc, 4018 TemplateArgumentListInfo &TemplateArgs, 4019 bool PartialTemplateArgs, 4020 SmallVectorImpl<TemplateArgument> &Converted); 4021 4022 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 4023 const TemplateArgumentLoc &Arg, 4024 SmallVectorImpl<TemplateArgument> &Converted); 4025 4026 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 4027 TypeSourceInfo *Arg); 4028 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 4029 TemplateArgument &Converted); 4030 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 4031 QualType InstantiatedParamType, Expr *Arg, 4032 TemplateArgument &Converted, 4033 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4034 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 4035 const TemplateArgumentLoc &Arg); 4036 4037 ExprResult 4038 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 4039 QualType ParamType, 4040 SourceLocation Loc); 4041 ExprResult 4042 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 4043 SourceLocation Loc); 4044 4045 /// \brief Enumeration describing how template parameter lists are compared 4046 /// for equality. 4047 enum TemplateParameterListEqualKind { 4048 /// \brief We are matching the template parameter lists of two templates 4049 /// that might be redeclarations. 4050 /// 4051 /// \code 4052 /// template<typename T> struct X; 4053 /// template<typename T> struct X; 4054 /// \endcode 4055 TPL_TemplateMatch, 4056 4057 /// \brief We are matching the template parameter lists of two template 4058 /// template parameters as part of matching the template parameter lists 4059 /// of two templates that might be redeclarations. 4060 /// 4061 /// \code 4062 /// template<template<int I> class TT> struct X; 4063 /// template<template<int Value> class Other> struct X; 4064 /// \endcode 4065 TPL_TemplateTemplateParmMatch, 4066 4067 /// \brief We are matching the template parameter lists of a template 4068 /// template argument against the template parameter lists of a template 4069 /// template parameter. 4070 /// 4071 /// \code 4072 /// template<template<int Value> class Metafun> struct X; 4073 /// template<int Value> struct integer_c; 4074 /// X<integer_c> xic; 4075 /// \endcode 4076 TPL_TemplateTemplateArgumentMatch 4077 }; 4078 4079 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 4080 TemplateParameterList *Old, 4081 bool Complain, 4082 TemplateParameterListEqualKind Kind, 4083 SourceLocation TemplateArgLoc 4084 = SourceLocation()); 4085 4086 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 4087 4088 /// \brief Called when the parser has parsed a C++ typename 4089 /// specifier, e.g., "typename T::type". 4090 /// 4091 /// \param S The scope in which this typename type occurs. 4092 /// \param TypenameLoc the location of the 'typename' keyword 4093 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4094 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 4095 /// \param IdLoc the location of the identifier. 4096 TypeResult 4097 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4098 const CXXScopeSpec &SS, const IdentifierInfo &II, 4099 SourceLocation IdLoc); 4100 4101 /// \brief Called when the parser has parsed a C++ typename 4102 /// specifier that ends in a template-id, e.g., 4103 /// "typename MetaFun::template apply<T1, T2>". 4104 /// 4105 /// \param S The scope in which this typename type occurs. 4106 /// \param TypenameLoc the location of the 'typename' keyword 4107 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4108 /// \param TemplateLoc the location of the 'template' keyword, if any. 4109 /// \param TemplateName The template name. 4110 /// \param TemplateNameLoc The location of the template name. 4111 /// \param LAngleLoc The location of the opening angle bracket ('<'). 4112 /// \param TemplateArgs The template arguments. 4113 /// \param RAngleLoc The location of the closing angle bracket ('>'). 4114 TypeResult 4115 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4116 const CXXScopeSpec &SS, 4117 SourceLocation TemplateLoc, 4118 TemplateTy Template, 4119 SourceLocation TemplateNameLoc, 4120 SourceLocation LAngleLoc, 4121 ASTTemplateArgsPtr TemplateArgs, 4122 SourceLocation RAngleLoc); 4123 4124 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 4125 SourceLocation KeywordLoc, 4126 NestedNameSpecifierLoc QualifierLoc, 4127 const IdentifierInfo &II, 4128 SourceLocation IILoc); 4129 4130 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 4131 SourceLocation Loc, 4132 DeclarationName Name); 4133 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 4134 4135 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 4136 4137 std::string 4138 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4139 const TemplateArgumentList &Args); 4140 4141 std::string 4142 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4143 const TemplateArgument *Args, 4144 unsigned NumArgs); 4145 4146 //===--------------------------------------------------------------------===// 4147 // C++ Variadic Templates (C++0x [temp.variadic]) 4148 //===--------------------------------------------------------------------===// 4149 4150 /// \brief The context in which an unexpanded parameter pack is 4151 /// being diagnosed. 4152 /// 4153 /// Note that the values of this enumeration line up with the first 4154 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4155 enum UnexpandedParameterPackContext { 4156 /// \brief An arbitrary expression. 4157 UPPC_Expression = 0, 4158 4159 /// \brief The base type of a class type. 4160 UPPC_BaseType, 4161 4162 /// \brief The type of an arbitrary declaration. 4163 UPPC_DeclarationType, 4164 4165 /// \brief The type of a data member. 4166 UPPC_DataMemberType, 4167 4168 /// \brief The size of a bit-field. 4169 UPPC_BitFieldWidth, 4170 4171 /// \brief The expression in a static assertion. 4172 UPPC_StaticAssertExpression, 4173 4174 /// \brief The fixed underlying type of an enumeration. 4175 UPPC_FixedUnderlyingType, 4176 4177 /// \brief The enumerator value. 4178 UPPC_EnumeratorValue, 4179 4180 /// \brief A using declaration. 4181 UPPC_UsingDeclaration, 4182 4183 /// \brief A friend declaration. 4184 UPPC_FriendDeclaration, 4185 4186 /// \brief A declaration qualifier. 4187 UPPC_DeclarationQualifier, 4188 4189 /// \brief An initializer. 4190 UPPC_Initializer, 4191 4192 /// \brief A default argument. 4193 UPPC_DefaultArgument, 4194 4195 /// \brief The type of a non-type template parameter. 4196 UPPC_NonTypeTemplateParameterType, 4197 4198 /// \brief The type of an exception. 4199 UPPC_ExceptionType, 4200 4201 /// \brief Partial specialization. 4202 UPPC_PartialSpecialization 4203 }; 4204 4205 /// \brief If the given type contains an unexpanded parameter pack, 4206 /// diagnose the error. 4207 /// 4208 /// \param Loc The source location where a diagnostc should be emitted. 4209 /// 4210 /// \param T The type that is being checked for unexpanded parameter 4211 /// packs. 4212 /// 4213 /// \returns true if an error occurred, false otherwise. 4214 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4215 UnexpandedParameterPackContext UPPC); 4216 4217 /// \brief If the given expression contains an unexpanded parameter 4218 /// pack, diagnose the error. 4219 /// 4220 /// \param E The expression that is being checked for unexpanded 4221 /// parameter packs. 4222 /// 4223 /// \returns true if an error occurred, false otherwise. 4224 bool DiagnoseUnexpandedParameterPack(Expr *E, 4225 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4226 4227 /// \brief If the given nested-name-specifier contains an unexpanded 4228 /// parameter pack, diagnose the error. 4229 /// 4230 /// \param SS The nested-name-specifier that is being checked for 4231 /// unexpanded parameter packs. 4232 /// 4233 /// \returns true if an error occurred, false otherwise. 4234 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4235 UnexpandedParameterPackContext UPPC); 4236 4237 /// \brief If the given name contains an unexpanded parameter pack, 4238 /// diagnose the error. 4239 /// 4240 /// \param NameInfo The name (with source location information) that 4241 /// is being checked for unexpanded parameter packs. 4242 /// 4243 /// \returns true if an error occurred, false otherwise. 4244 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4245 UnexpandedParameterPackContext UPPC); 4246 4247 /// \brief If the given template name contains an unexpanded parameter pack, 4248 /// diagnose the error. 4249 /// 4250 /// \param Loc The location of the template name. 4251 /// 4252 /// \param Template The template name that is being checked for unexpanded 4253 /// parameter packs. 4254 /// 4255 /// \returns true if an error occurred, false otherwise. 4256 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4257 TemplateName Template, 4258 UnexpandedParameterPackContext UPPC); 4259 4260 /// \brief If the given template argument contains an unexpanded parameter 4261 /// pack, diagnose the error. 4262 /// 4263 /// \param Arg The template argument that is being checked for unexpanded 4264 /// parameter packs. 4265 /// 4266 /// \returns true if an error occurred, false otherwise. 4267 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4268 UnexpandedParameterPackContext UPPC); 4269 4270 /// \brief Collect the set of unexpanded parameter packs within the given 4271 /// template argument. 4272 /// 4273 /// \param Arg The template argument that will be traversed to find 4274 /// unexpanded parameter packs. 4275 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4276 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4277 4278 /// \brief Collect the set of unexpanded parameter packs within the given 4279 /// template argument. 4280 /// 4281 /// \param Arg The template argument that will be traversed to find 4282 /// unexpanded parameter packs. 4283 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4284 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4285 4286 /// \brief Collect the set of unexpanded parameter packs within the given 4287 /// type. 4288 /// 4289 /// \param T The type that will be traversed to find 4290 /// unexpanded parameter packs. 4291 void collectUnexpandedParameterPacks(QualType T, 4292 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4293 4294 /// \brief Collect the set of unexpanded parameter packs within the given 4295 /// type. 4296 /// 4297 /// \param TL The type that will be traversed to find 4298 /// unexpanded parameter packs. 4299 void collectUnexpandedParameterPacks(TypeLoc TL, 4300 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4301 4302 /// \brief Invoked when parsing a template argument followed by an 4303 /// ellipsis, which creates a pack expansion. 4304 /// 4305 /// \param Arg The template argument preceding the ellipsis, which 4306 /// may already be invalid. 4307 /// 4308 /// \param EllipsisLoc The location of the ellipsis. 4309 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4310 SourceLocation EllipsisLoc); 4311 4312 /// \brief Invoked when parsing a type followed by an ellipsis, which 4313 /// creates a pack expansion. 4314 /// 4315 /// \param Type The type preceding the ellipsis, which will become 4316 /// the pattern of the pack expansion. 4317 /// 4318 /// \param EllipsisLoc The location of the ellipsis. 4319 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4320 4321 /// \brief Construct a pack expansion type from the pattern of the pack 4322 /// expansion. 4323 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4324 SourceLocation EllipsisLoc, 4325 llvm::Optional<unsigned> NumExpansions); 4326 4327 /// \brief Construct a pack expansion type from the pattern of the pack 4328 /// expansion. 4329 QualType CheckPackExpansion(QualType Pattern, 4330 SourceRange PatternRange, 4331 SourceLocation EllipsisLoc, 4332 llvm::Optional<unsigned> NumExpansions); 4333 4334 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4335 /// creates a pack expansion. 4336 /// 4337 /// \param Pattern The expression preceding the ellipsis, which will become 4338 /// the pattern of the pack expansion. 4339 /// 4340 /// \param EllipsisLoc The location of the ellipsis. 4341 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4342 4343 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4344 /// creates a pack expansion. 4345 /// 4346 /// \param Pattern The expression preceding the ellipsis, which will become 4347 /// the pattern of the pack expansion. 4348 /// 4349 /// \param EllipsisLoc The location of the ellipsis. 4350 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4351 llvm::Optional<unsigned> NumExpansions); 4352 4353 /// \brief Determine whether we could expand a pack expansion with the 4354 /// given set of parameter packs into separate arguments by repeatedly 4355 /// transforming the pattern. 4356 /// 4357 /// \param EllipsisLoc The location of the ellipsis that identifies the 4358 /// pack expansion. 4359 /// 4360 /// \param PatternRange The source range that covers the entire pattern of 4361 /// the pack expansion. 4362 /// 4363 /// \param Unexpanded The set of unexpanded parameter packs within the 4364 /// pattern. 4365 /// 4366 /// \param NumUnexpanded The number of unexpanded parameter packs in 4367 /// \p Unexpanded. 4368 /// 4369 /// \param ShouldExpand Will be set to \c true if the transformer should 4370 /// expand the corresponding pack expansions into separate arguments. When 4371 /// set, \c NumExpansions must also be set. 4372 /// 4373 /// \param RetainExpansion Whether the caller should add an unexpanded 4374 /// pack expansion after all of the expanded arguments. This is used 4375 /// when extending explicitly-specified template argument packs per 4376 /// C++0x [temp.arg.explicit]p9. 4377 /// 4378 /// \param NumExpansions The number of separate arguments that will be in 4379 /// the expanded form of the corresponding pack expansion. This is both an 4380 /// input and an output parameter, which can be set by the caller if the 4381 /// number of expansions is known a priori (e.g., due to a prior substitution) 4382 /// and will be set by the callee when the number of expansions is known. 4383 /// The callee must set this value when \c ShouldExpand is \c true; it may 4384 /// set this value in other cases. 4385 /// 4386 /// \returns true if an error occurred (e.g., because the parameter packs 4387 /// are to be instantiated with arguments of different lengths), false 4388 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4389 /// must be set. 4390 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4391 SourceRange PatternRange, 4392 llvm::ArrayRef<UnexpandedParameterPack> Unexpanded, 4393 const MultiLevelTemplateArgumentList &TemplateArgs, 4394 bool &ShouldExpand, 4395 bool &RetainExpansion, 4396 llvm::Optional<unsigned> &NumExpansions); 4397 4398 /// \brief Determine the number of arguments in the given pack expansion 4399 /// type. 4400 /// 4401 /// This routine already assumes that the pack expansion type can be 4402 /// expanded and that the number of arguments in the expansion is 4403 /// consistent across all of the unexpanded parameter packs in its pattern. 4404 unsigned getNumArgumentsInExpansion(QualType T, 4405 const MultiLevelTemplateArgumentList &TemplateArgs); 4406 4407 /// \brief Determine whether the given declarator contains any unexpanded 4408 /// parameter packs. 4409 /// 4410 /// This routine is used by the parser to disambiguate function declarators 4411 /// with an ellipsis prior to the ')', e.g., 4412 /// 4413 /// \code 4414 /// void f(T...); 4415 /// \endcode 4416 /// 4417 /// To determine whether we have an (unnamed) function parameter pack or 4418 /// a variadic function. 4419 /// 4420 /// \returns true if the declarator contains any unexpanded parameter packs, 4421 /// false otherwise. 4422 bool containsUnexpandedParameterPacks(Declarator &D); 4423 4424 //===--------------------------------------------------------------------===// 4425 // C++ Template Argument Deduction (C++ [temp.deduct]) 4426 //===--------------------------------------------------------------------===// 4427 4428 /// \brief Describes the result of template argument deduction. 4429 /// 4430 /// The TemplateDeductionResult enumeration describes the result of 4431 /// template argument deduction, as returned from 4432 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4433 /// structure provides additional information about the results of 4434 /// template argument deduction, e.g., the deduced template argument 4435 /// list (if successful) or the specific template parameters or 4436 /// deduced arguments that were involved in the failure. 4437 enum TemplateDeductionResult { 4438 /// \brief Template argument deduction was successful. 4439 TDK_Success = 0, 4440 /// \brief Template argument deduction exceeded the maximum template 4441 /// instantiation depth (which has already been diagnosed). 4442 TDK_InstantiationDepth, 4443 /// \brief Template argument deduction did not deduce a value 4444 /// for every template parameter. 4445 TDK_Incomplete, 4446 /// \brief Template argument deduction produced inconsistent 4447 /// deduced values for the given template parameter. 4448 TDK_Inconsistent, 4449 /// \brief Template argument deduction failed due to inconsistent 4450 /// cv-qualifiers on a template parameter type that would 4451 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4452 /// but were given a non-const "X". 4453 TDK_Underqualified, 4454 /// \brief Substitution of the deduced template argument values 4455 /// resulted in an error. 4456 TDK_SubstitutionFailure, 4457 /// \brief Substitution of the deduced template argument values 4458 /// into a non-deduced context produced a type or value that 4459 /// produces a type that does not match the original template 4460 /// arguments provided. 4461 TDK_NonDeducedMismatch, 4462 /// \brief When performing template argument deduction for a function 4463 /// template, there were too many call arguments. 4464 TDK_TooManyArguments, 4465 /// \brief When performing template argument deduction for a function 4466 /// template, there were too few call arguments. 4467 TDK_TooFewArguments, 4468 /// \brief The explicitly-specified template arguments were not valid 4469 /// template arguments for the given template. 4470 TDK_InvalidExplicitArguments, 4471 /// \brief The arguments included an overloaded function name that could 4472 /// not be resolved to a suitable function. 4473 TDK_FailedOverloadResolution 4474 }; 4475 4476 TemplateDeductionResult 4477 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4478 const TemplateArgumentList &TemplateArgs, 4479 sema::TemplateDeductionInfo &Info); 4480 4481 TemplateDeductionResult 4482 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4483 TemplateArgumentListInfo &ExplicitTemplateArgs, 4484 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4485 SmallVectorImpl<QualType> &ParamTypes, 4486 QualType *FunctionType, 4487 sema::TemplateDeductionInfo &Info); 4488 4489 /// brief A function argument from which we performed template argument 4490 // deduction for a call. 4491 struct OriginalCallArg { 4492 OriginalCallArg(QualType OriginalParamType, 4493 unsigned ArgIdx, 4494 QualType OriginalArgType) 4495 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4496 OriginalArgType(OriginalArgType) { } 4497 4498 QualType OriginalParamType; 4499 unsigned ArgIdx; 4500 QualType OriginalArgType; 4501 }; 4502 4503 TemplateDeductionResult 4504 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4505 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4506 unsigned NumExplicitlySpecified, 4507 FunctionDecl *&Specialization, 4508 sema::TemplateDeductionInfo &Info, 4509 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4510 4511 TemplateDeductionResult 4512 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4513 TemplateArgumentListInfo *ExplicitTemplateArgs, 4514 Expr **Args, unsigned NumArgs, 4515 FunctionDecl *&Specialization, 4516 sema::TemplateDeductionInfo &Info); 4517 4518 TemplateDeductionResult 4519 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4520 TemplateArgumentListInfo *ExplicitTemplateArgs, 4521 QualType ArgFunctionType, 4522 FunctionDecl *&Specialization, 4523 sema::TemplateDeductionInfo &Info); 4524 4525 TemplateDeductionResult 4526 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4527 QualType ToType, 4528 CXXConversionDecl *&Specialization, 4529 sema::TemplateDeductionInfo &Info); 4530 4531 TemplateDeductionResult 4532 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4533 TemplateArgumentListInfo *ExplicitTemplateArgs, 4534 FunctionDecl *&Specialization, 4535 sema::TemplateDeductionInfo &Info); 4536 4537 bool DeduceAutoType(TypeSourceInfo *AutoType, Expr *Initializer, 4538 TypeSourceInfo *&Result); 4539 4540 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4541 FunctionTemplateDecl *FT2, 4542 SourceLocation Loc, 4543 TemplatePartialOrderingContext TPOC, 4544 unsigned NumCallArguments); 4545 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4546 UnresolvedSetIterator SEnd, 4547 TemplatePartialOrderingContext TPOC, 4548 unsigned NumCallArguments, 4549 SourceLocation Loc, 4550 const PartialDiagnostic &NoneDiag, 4551 const PartialDiagnostic &AmbigDiag, 4552 const PartialDiagnostic &CandidateDiag, 4553 bool Complain = true); 4554 4555 ClassTemplatePartialSpecializationDecl * 4556 getMoreSpecializedPartialSpecialization( 4557 ClassTemplatePartialSpecializationDecl *PS1, 4558 ClassTemplatePartialSpecializationDecl *PS2, 4559 SourceLocation Loc); 4560 4561 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4562 bool OnlyDeduced, 4563 unsigned Depth, 4564 SmallVectorImpl<bool> &Used); 4565 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4566 SmallVectorImpl<bool> &Deduced); 4567 4568 //===--------------------------------------------------------------------===// 4569 // C++ Template Instantiation 4570 // 4571 4572 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4573 const TemplateArgumentList *Innermost = 0, 4574 bool RelativeToPrimary = false, 4575 const FunctionDecl *Pattern = 0); 4576 4577 /// \brief A template instantiation that is currently in progress. 4578 struct ActiveTemplateInstantiation { 4579 /// \brief The kind of template instantiation we are performing 4580 enum InstantiationKind { 4581 /// We are instantiating a template declaration. The entity is 4582 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4583 TemplateInstantiation, 4584 4585 /// We are instantiating a default argument for a template 4586 /// parameter. The Entity is the template, and 4587 /// TemplateArgs/NumTemplateArguments provides the template 4588 /// arguments as specified. 4589 /// FIXME: Use a TemplateArgumentList 4590 DefaultTemplateArgumentInstantiation, 4591 4592 /// We are instantiating a default argument for a function. 4593 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4594 /// provides the template arguments as specified. 4595 DefaultFunctionArgumentInstantiation, 4596 4597 /// We are substituting explicit template arguments provided for 4598 /// a function template. The entity is a FunctionTemplateDecl. 4599 ExplicitTemplateArgumentSubstitution, 4600 4601 /// We are substituting template argument determined as part of 4602 /// template argument deduction for either a class template 4603 /// partial specialization or a function template. The 4604 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4605 /// a FunctionTemplateDecl. 4606 DeducedTemplateArgumentSubstitution, 4607 4608 /// We are substituting prior template arguments into a new 4609 /// template parameter. The template parameter itself is either a 4610 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4611 PriorTemplateArgumentSubstitution, 4612 4613 /// We are checking the validity of a default template argument that 4614 /// has been used when naming a template-id. 4615 DefaultTemplateArgumentChecking 4616 } Kind; 4617 4618 /// \brief The point of instantiation within the source code. 4619 SourceLocation PointOfInstantiation; 4620 4621 /// \brief The template (or partial specialization) in which we are 4622 /// performing the instantiation, for substitutions of prior template 4623 /// arguments. 4624 NamedDecl *Template; 4625 4626 /// \brief The entity that is being instantiated. 4627 uintptr_t Entity; 4628 4629 /// \brief The list of template arguments we are substituting, if they 4630 /// are not part of the entity. 4631 const TemplateArgument *TemplateArgs; 4632 4633 /// \brief The number of template arguments in TemplateArgs. 4634 unsigned NumTemplateArgs; 4635 4636 /// \brief The template deduction info object associated with the 4637 /// substitution or checking of explicit or deduced template arguments. 4638 sema::TemplateDeductionInfo *DeductionInfo; 4639 4640 /// \brief The source range that covers the construct that cause 4641 /// the instantiation, e.g., the template-id that causes a class 4642 /// template instantiation. 4643 SourceRange InstantiationRange; 4644 4645 ActiveTemplateInstantiation() 4646 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4647 NumTemplateArgs(0), DeductionInfo(0) {} 4648 4649 /// \brief Determines whether this template is an actual instantiation 4650 /// that should be counted toward the maximum instantiation depth. 4651 bool isInstantiationRecord() const; 4652 4653 friend bool operator==(const ActiveTemplateInstantiation &X, 4654 const ActiveTemplateInstantiation &Y) { 4655 if (X.Kind != Y.Kind) 4656 return false; 4657 4658 if (X.Entity != Y.Entity) 4659 return false; 4660 4661 switch (X.Kind) { 4662 case TemplateInstantiation: 4663 return true; 4664 4665 case PriorTemplateArgumentSubstitution: 4666 case DefaultTemplateArgumentChecking: 4667 if (X.Template != Y.Template) 4668 return false; 4669 4670 // Fall through 4671 4672 case DefaultTemplateArgumentInstantiation: 4673 case ExplicitTemplateArgumentSubstitution: 4674 case DeducedTemplateArgumentSubstitution: 4675 case DefaultFunctionArgumentInstantiation: 4676 return X.TemplateArgs == Y.TemplateArgs; 4677 4678 } 4679 4680 return true; 4681 } 4682 4683 friend bool operator!=(const ActiveTemplateInstantiation &X, 4684 const ActiveTemplateInstantiation &Y) { 4685 return !(X == Y); 4686 } 4687 }; 4688 4689 /// \brief List of active template instantiations. 4690 /// 4691 /// This vector is treated as a stack. As one template instantiation 4692 /// requires another template instantiation, additional 4693 /// instantiations are pushed onto the stack up to a 4694 /// user-configurable limit LangOptions::InstantiationDepth. 4695 SmallVector<ActiveTemplateInstantiation, 16> 4696 ActiveTemplateInstantiations; 4697 4698 /// \brief Whether we are in a SFINAE context that is not associated with 4699 /// template instantiation. 4700 /// 4701 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4702 /// of a template instantiation or template argument deduction. 4703 bool InNonInstantiationSFINAEContext; 4704 4705 /// \brief The number of ActiveTemplateInstantiation entries in 4706 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4707 /// therefore, should not be counted as part of the instantiation depth. 4708 unsigned NonInstantiationEntries; 4709 4710 /// \brief The last template from which a template instantiation 4711 /// error or warning was produced. 4712 /// 4713 /// This value is used to suppress printing of redundant template 4714 /// instantiation backtraces when there are multiple errors in the 4715 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4716 /// to implement it anywhere else. 4717 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4718 4719 /// \brief The current index into pack expansion arguments that will be 4720 /// used for substitution of parameter packs. 4721 /// 4722 /// The pack expansion index will be -1 to indicate that parameter packs 4723 /// should be instantiated as themselves. Otherwise, the index specifies 4724 /// which argument within the parameter pack will be used for substitution. 4725 int ArgumentPackSubstitutionIndex; 4726 4727 /// \brief RAII object used to change the argument pack substitution index 4728 /// within a \c Sema object. 4729 /// 4730 /// See \c ArgumentPackSubstitutionIndex for more information. 4731 class ArgumentPackSubstitutionIndexRAII { 4732 Sema &Self; 4733 int OldSubstitutionIndex; 4734 4735 public: 4736 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4737 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4738 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4739 } 4740 4741 ~ArgumentPackSubstitutionIndexRAII() { 4742 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4743 } 4744 }; 4745 4746 friend class ArgumentPackSubstitutionRAII; 4747 4748 /// \brief The stack of calls expression undergoing template instantiation. 4749 /// 4750 /// The top of this stack is used by a fixit instantiating unresolved 4751 /// function calls to fix the AST to match the textual change it prints. 4752 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4753 4754 /// \brief For each declaration that involved template argument deduction, the 4755 /// set of diagnostics that were suppressed during that template argument 4756 /// deduction. 4757 /// 4758 /// FIXME: Serialize this structure to the AST file. 4759 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 4760 SuppressedDiagnostics; 4761 4762 /// \brief A stack object to be created when performing template 4763 /// instantiation. 4764 /// 4765 /// Construction of an object of type \c InstantiatingTemplate 4766 /// pushes the current instantiation onto the stack of active 4767 /// instantiations. If the size of this stack exceeds the maximum 4768 /// number of recursive template instantiations, construction 4769 /// produces an error and evaluates true. 4770 /// 4771 /// Destruction of this object will pop the named instantiation off 4772 /// the stack. 4773 struct InstantiatingTemplate { 4774 /// \brief Note that we are instantiating a class template, 4775 /// function template, or a member thereof. 4776 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4777 Decl *Entity, 4778 SourceRange InstantiationRange = SourceRange()); 4779 4780 /// \brief Note that we are instantiating a default argument in a 4781 /// template-id. 4782 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4783 TemplateDecl *Template, 4784 const TemplateArgument *TemplateArgs, 4785 unsigned NumTemplateArgs, 4786 SourceRange InstantiationRange = SourceRange()); 4787 4788 /// \brief Note that we are instantiating a default argument in a 4789 /// template-id. 4790 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4791 FunctionTemplateDecl *FunctionTemplate, 4792 const TemplateArgument *TemplateArgs, 4793 unsigned NumTemplateArgs, 4794 ActiveTemplateInstantiation::InstantiationKind Kind, 4795 sema::TemplateDeductionInfo &DeductionInfo, 4796 SourceRange InstantiationRange = SourceRange()); 4797 4798 /// \brief Note that we are instantiating as part of template 4799 /// argument deduction for a class template partial 4800 /// specialization. 4801 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4802 ClassTemplatePartialSpecializationDecl *PartialSpec, 4803 const TemplateArgument *TemplateArgs, 4804 unsigned NumTemplateArgs, 4805 sema::TemplateDeductionInfo &DeductionInfo, 4806 SourceRange InstantiationRange = SourceRange()); 4807 4808 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4809 ParmVarDecl *Param, 4810 const TemplateArgument *TemplateArgs, 4811 unsigned NumTemplateArgs, 4812 SourceRange InstantiationRange = SourceRange()); 4813 4814 /// \brief Note that we are substituting prior template arguments into a 4815 /// non-type or template template parameter. 4816 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4817 NamedDecl *Template, 4818 NonTypeTemplateParmDecl *Param, 4819 const TemplateArgument *TemplateArgs, 4820 unsigned NumTemplateArgs, 4821 SourceRange InstantiationRange); 4822 4823 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4824 NamedDecl *Template, 4825 TemplateTemplateParmDecl *Param, 4826 const TemplateArgument *TemplateArgs, 4827 unsigned NumTemplateArgs, 4828 SourceRange InstantiationRange); 4829 4830 /// \brief Note that we are checking the default template argument 4831 /// against the template parameter for a given template-id. 4832 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4833 TemplateDecl *Template, 4834 NamedDecl *Param, 4835 const TemplateArgument *TemplateArgs, 4836 unsigned NumTemplateArgs, 4837 SourceRange InstantiationRange); 4838 4839 4840 /// \brief Note that we have finished instantiating this template. 4841 void Clear(); 4842 4843 ~InstantiatingTemplate() { Clear(); } 4844 4845 /// \brief Determines whether we have exceeded the maximum 4846 /// recursive template instantiations. 4847 operator bool() const { return Invalid; } 4848 4849 private: 4850 Sema &SemaRef; 4851 bool Invalid; 4852 bool SavedInNonInstantiationSFINAEContext; 4853 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4854 SourceRange InstantiationRange); 4855 4856 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4857 4858 InstantiatingTemplate& 4859 operator=(const InstantiatingTemplate&); // not implemented 4860 }; 4861 4862 void PrintInstantiationStack(); 4863 4864 /// \brief Determines whether we are currently in a context where 4865 /// template argument substitution failures are not considered 4866 /// errors. 4867 /// 4868 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4869 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4870 /// template-deduction context object, which can be used to capture 4871 /// diagnostics that will be suppressed. 4872 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4873 4874 /// \brief RAII class used to determine whether SFINAE has 4875 /// trapped any errors that occur during template argument 4876 /// deduction.` 4877 class SFINAETrap { 4878 Sema &SemaRef; 4879 unsigned PrevSFINAEErrors; 4880 bool PrevInNonInstantiationSFINAEContext; 4881 bool PrevAccessCheckingSFINAE; 4882 4883 public: 4884 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 4885 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 4886 PrevInNonInstantiationSFINAEContext( 4887 SemaRef.InNonInstantiationSFINAEContext), 4888 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 4889 { 4890 if (!SemaRef.isSFINAEContext()) 4891 SemaRef.InNonInstantiationSFINAEContext = true; 4892 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 4893 } 4894 4895 ~SFINAETrap() { 4896 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 4897 SemaRef.InNonInstantiationSFINAEContext 4898 = PrevInNonInstantiationSFINAEContext; 4899 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 4900 } 4901 4902 /// \brief Determine whether any SFINAE errors have been trapped. 4903 bool hasErrorOccurred() const { 4904 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 4905 } 4906 }; 4907 4908 /// \brief The current instantiation scope used to store local 4909 /// variables. 4910 LocalInstantiationScope *CurrentInstantiationScope; 4911 4912 /// \brief The number of typos corrected by CorrectTypo. 4913 unsigned TyposCorrected; 4914 4915 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 4916 UnqualifiedTyposCorrectedMap; 4917 4918 /// \brief A cache containing the results of typo correction for unqualified 4919 /// name lookup. 4920 /// 4921 /// The string is the string that we corrected to (which may be empty, if 4922 /// there was no correction), while the boolean will be true when the 4923 /// string represents a keyword. 4924 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 4925 4926 /// \brief Worker object for performing CFG-based warnings. 4927 sema::AnalysisBasedWarnings AnalysisWarnings; 4928 4929 /// \brief An entity for which implicit template instantiation is required. 4930 /// 4931 /// The source location associated with the declaration is the first place in 4932 /// the source code where the declaration was "used". It is not necessarily 4933 /// the point of instantiation (which will be either before or after the 4934 /// namespace-scope declaration that triggered this implicit instantiation), 4935 /// However, it is the location that diagnostics should generally refer to, 4936 /// because users will need to know what code triggered the instantiation. 4937 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 4938 4939 /// \brief The queue of implicit template instantiations that are required 4940 /// but have not yet been performed. 4941 std::deque<PendingImplicitInstantiation> PendingInstantiations; 4942 4943 /// \brief The queue of implicit template instantiations that are required 4944 /// and must be performed within the current local scope. 4945 /// 4946 /// This queue is only used for member functions of local classes in 4947 /// templates, which must be instantiated in the same scope as their 4948 /// enclosing function, so that they can reference function-local 4949 /// types, static variables, enumerators, etc. 4950 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 4951 4952 void PerformPendingInstantiations(bool LocalOnly = false); 4953 4954 TypeSourceInfo *SubstType(TypeSourceInfo *T, 4955 const MultiLevelTemplateArgumentList &TemplateArgs, 4956 SourceLocation Loc, DeclarationName Entity); 4957 4958 QualType SubstType(QualType T, 4959 const MultiLevelTemplateArgumentList &TemplateArgs, 4960 SourceLocation Loc, DeclarationName Entity); 4961 4962 TypeSourceInfo *SubstType(TypeLoc TL, 4963 const MultiLevelTemplateArgumentList &TemplateArgs, 4964 SourceLocation Loc, DeclarationName Entity); 4965 4966 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 4967 const MultiLevelTemplateArgumentList &TemplateArgs, 4968 SourceLocation Loc, 4969 DeclarationName Entity); 4970 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 4971 const MultiLevelTemplateArgumentList &TemplateArgs, 4972 int indexAdjustment, 4973 llvm::Optional<unsigned> NumExpansions); 4974 bool SubstParmTypes(SourceLocation Loc, 4975 ParmVarDecl **Params, unsigned NumParams, 4976 const MultiLevelTemplateArgumentList &TemplateArgs, 4977 SmallVectorImpl<QualType> &ParamTypes, 4978 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 4979 ExprResult SubstExpr(Expr *E, 4980 const MultiLevelTemplateArgumentList &TemplateArgs); 4981 4982 /// \brief Substitute the given template arguments into a list of 4983 /// expressions, expanding pack expansions if required. 4984 /// 4985 /// \param Exprs The list of expressions to substitute into. 4986 /// 4987 /// \param NumExprs The number of expressions in \p Exprs. 4988 /// 4989 /// \param IsCall Whether this is some form of call, in which case 4990 /// default arguments will be dropped. 4991 /// 4992 /// \param TemplateArgs The set of template arguments to substitute. 4993 /// 4994 /// \param Outputs Will receive all of the substituted arguments. 4995 /// 4996 /// \returns true if an error occurred, false otherwise. 4997 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 4998 const MultiLevelTemplateArgumentList &TemplateArgs, 4999 SmallVectorImpl<Expr *> &Outputs); 5000 5001 StmtResult SubstStmt(Stmt *S, 5002 const MultiLevelTemplateArgumentList &TemplateArgs); 5003 5004 Decl *SubstDecl(Decl *D, DeclContext *Owner, 5005 const MultiLevelTemplateArgumentList &TemplateArgs); 5006 5007 bool 5008 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 5009 CXXRecordDecl *Pattern, 5010 const MultiLevelTemplateArgumentList &TemplateArgs); 5011 5012 bool 5013 InstantiateClass(SourceLocation PointOfInstantiation, 5014 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 5015 const MultiLevelTemplateArgumentList &TemplateArgs, 5016 TemplateSpecializationKind TSK, 5017 bool Complain = true); 5018 5019 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 5020 const Decl *Pattern, Decl *Inst); 5021 5022 bool 5023 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 5024 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5025 TemplateSpecializationKind TSK, 5026 bool Complain = true); 5027 5028 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 5029 CXXRecordDecl *Instantiation, 5030 const MultiLevelTemplateArgumentList &TemplateArgs, 5031 TemplateSpecializationKind TSK); 5032 5033 void InstantiateClassTemplateSpecializationMembers( 5034 SourceLocation PointOfInstantiation, 5035 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5036 TemplateSpecializationKind TSK); 5037 5038 NestedNameSpecifierLoc 5039 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 5040 const MultiLevelTemplateArgumentList &TemplateArgs); 5041 5042 DeclarationNameInfo 5043 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 5044 const MultiLevelTemplateArgumentList &TemplateArgs); 5045 TemplateName 5046 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 5047 SourceLocation Loc, 5048 const MultiLevelTemplateArgumentList &TemplateArgs); 5049 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 5050 TemplateArgumentListInfo &Result, 5051 const MultiLevelTemplateArgumentList &TemplateArgs); 5052 5053 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 5054 FunctionDecl *Function, 5055 bool Recursive = false, 5056 bool DefinitionRequired = false); 5057 void InstantiateStaticDataMemberDefinition( 5058 SourceLocation PointOfInstantiation, 5059 VarDecl *Var, 5060 bool Recursive = false, 5061 bool DefinitionRequired = false); 5062 5063 void InstantiateMemInitializers(CXXConstructorDecl *New, 5064 const CXXConstructorDecl *Tmpl, 5065 const MultiLevelTemplateArgumentList &TemplateArgs); 5066 bool InstantiateInitializer(Expr *Init, 5067 const MultiLevelTemplateArgumentList &TemplateArgs, 5068 SourceLocation &LParenLoc, 5069 ASTOwningVector<Expr*> &NewArgs, 5070 SourceLocation &RParenLoc); 5071 5072 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 5073 const MultiLevelTemplateArgumentList &TemplateArgs); 5074 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 5075 const MultiLevelTemplateArgumentList &TemplateArgs); 5076 5077 // Objective-C declarations. 5078 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 5079 IdentifierInfo *ClassName, 5080 SourceLocation ClassLoc, 5081 IdentifierInfo *SuperName, 5082 SourceLocation SuperLoc, 5083 Decl * const *ProtoRefs, 5084 unsigned NumProtoRefs, 5085 const SourceLocation *ProtoLocs, 5086 SourceLocation EndProtoLoc, 5087 AttributeList *AttrList); 5088 5089 Decl *ActOnCompatiblityAlias( 5090 SourceLocation AtCompatibilityAliasLoc, 5091 IdentifierInfo *AliasName, SourceLocation AliasLocation, 5092 IdentifierInfo *ClassName, SourceLocation ClassLocation); 5093 5094 bool CheckForwardProtocolDeclarationForCircularDependency( 5095 IdentifierInfo *PName, 5096 SourceLocation &PLoc, SourceLocation PrevLoc, 5097 const ObjCList<ObjCProtocolDecl> &PList); 5098 5099 Decl *ActOnStartProtocolInterface( 5100 SourceLocation AtProtoInterfaceLoc, 5101 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 5102 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 5103 const SourceLocation *ProtoLocs, 5104 SourceLocation EndProtoLoc, 5105 AttributeList *AttrList); 5106 5107 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 5108 IdentifierInfo *ClassName, 5109 SourceLocation ClassLoc, 5110 IdentifierInfo *CategoryName, 5111 SourceLocation CategoryLoc, 5112 Decl * const *ProtoRefs, 5113 unsigned NumProtoRefs, 5114 const SourceLocation *ProtoLocs, 5115 SourceLocation EndProtoLoc); 5116 5117 Decl *ActOnStartClassImplementation( 5118 SourceLocation AtClassImplLoc, 5119 IdentifierInfo *ClassName, SourceLocation ClassLoc, 5120 IdentifierInfo *SuperClassname, 5121 SourceLocation SuperClassLoc); 5122 5123 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 5124 IdentifierInfo *ClassName, 5125 SourceLocation ClassLoc, 5126 IdentifierInfo *CatName, 5127 SourceLocation CatLoc); 5128 5129 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc, 5130 IdentifierInfo **IdentList, 5131 SourceLocation *IdentLocs, 5132 unsigned NumElts); 5133 5134 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 5135 const IdentifierLocPair *IdentList, 5136 unsigned NumElts, 5137 AttributeList *attrList); 5138 5139 void FindProtocolDeclaration(bool WarnOnDeclarations, 5140 const IdentifierLocPair *ProtocolId, 5141 unsigned NumProtocols, 5142 SmallVectorImpl<Decl *> &Protocols); 5143 5144 /// Ensure attributes are consistent with type. 5145 /// \param [in, out] Attributes The attributes to check; they will 5146 /// be modified to be consistent with \arg PropertyTy. 5147 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5148 SourceLocation Loc, 5149 unsigned &Attributes); 5150 5151 /// Process the specified property declaration and create decls for the 5152 /// setters and getters as needed. 5153 /// \param property The property declaration being processed 5154 /// \param DC The semantic container for the property 5155 /// \param redeclaredProperty Declaration for property if redeclared 5156 /// in class extension. 5157 /// \param lexicalDC Container for redeclaredProperty. 5158 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5159 ObjCContainerDecl *DC, 5160 ObjCPropertyDecl *redeclaredProperty = 0, 5161 ObjCContainerDecl *lexicalDC = 0); 5162 5163 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5164 ObjCPropertyDecl *SuperProperty, 5165 const IdentifierInfo *Name); 5166 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5167 5168 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5169 ObjCMethodDecl *MethodDecl, 5170 bool IsInstance); 5171 5172 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5173 5174 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5175 ObjCInterfaceDecl *ID); 5176 5177 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5178 ObjCProtocolDecl *PDecl); 5179 5180 void ActOnAtEnd(Scope *S, SourceRange AtEnd, 5181 Decl **allMethods = 0, unsigned allNum = 0, 5182 Decl **allProperties = 0, unsigned pNum = 0, 5183 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5184 5185 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5186 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5187 Selector GetterSel, Selector SetterSel, 5188 bool *OverridingProperty, 5189 tok::ObjCKeywordKind MethodImplKind, 5190 DeclContext *lexicalDC = 0); 5191 5192 Decl *ActOnPropertyImplDecl(Scope *S, 5193 SourceLocation AtLoc, 5194 SourceLocation PropertyLoc, 5195 bool ImplKind, 5196 IdentifierInfo *PropertyId, 5197 IdentifierInfo *PropertyIvar, 5198 SourceLocation PropertyIvarLoc); 5199 5200 enum ObjCSpecialMethodKind { 5201 OSMK_None, 5202 OSMK_Alloc, 5203 OSMK_New, 5204 OSMK_Copy, 5205 OSMK_RetainingInit, 5206 OSMK_NonRetainingInit 5207 }; 5208 5209 struct ObjCArgInfo { 5210 IdentifierInfo *Name; 5211 SourceLocation NameLoc; 5212 // The Type is null if no type was specified, and the DeclSpec is invalid 5213 // in this case. 5214 ParsedType Type; 5215 ObjCDeclSpec DeclSpec; 5216 5217 /// ArgAttrs - Attribute list for this argument. 5218 AttributeList *ArgAttrs; 5219 }; 5220 5221 Decl *ActOnMethodDeclaration( 5222 Scope *S, 5223 SourceLocation BeginLoc, // location of the + or -. 5224 SourceLocation EndLoc, // location of the ; or {. 5225 tok::TokenKind MethodType, 5226 ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5227 ArrayRef<SourceLocation> SelectorLocs, Selector Sel, 5228 // optional arguments. The number of types/arguments is obtained 5229 // from the Sel.getNumArgs(). 5230 ObjCArgInfo *ArgInfo, 5231 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5232 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5233 bool isVariadic, bool MethodDefinition); 5234 5235 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5236 // Will search "local" class/category implementations for a method decl. 5237 // Will also search in class's root looking for instance method. 5238 // Returns 0 if no method is found. 5239 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5240 ObjCInterfaceDecl *CDecl); 5241 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5242 ObjCInterfaceDecl *ClassDecl); 5243 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5244 const ObjCObjectPointerType *OPT, 5245 bool IsInstance); 5246 5247 bool inferObjCARCLifetime(ValueDecl *decl); 5248 5249 ExprResult 5250 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5251 Expr *BaseExpr, 5252 SourceLocation OpLoc, 5253 DeclarationName MemberName, 5254 SourceLocation MemberLoc, 5255 SourceLocation SuperLoc, QualType SuperType, 5256 bool Super); 5257 5258 ExprResult 5259 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5260 IdentifierInfo &propertyName, 5261 SourceLocation receiverNameLoc, 5262 SourceLocation propertyNameLoc); 5263 5264 ObjCMethodDecl *tryCaptureObjCSelf(); 5265 5266 /// \brief Describes the kind of message expression indicated by a message 5267 /// send that starts with an identifier. 5268 enum ObjCMessageKind { 5269 /// \brief The message is sent to 'super'. 5270 ObjCSuperMessage, 5271 /// \brief The message is an instance message. 5272 ObjCInstanceMessage, 5273 /// \brief The message is a class message, and the identifier is a type 5274 /// name. 5275 ObjCClassMessage 5276 }; 5277 5278 ObjCMessageKind getObjCMessageKind(Scope *S, 5279 IdentifierInfo *Name, 5280 SourceLocation NameLoc, 5281 bool IsSuper, 5282 bool HasTrailingDot, 5283 ParsedType &ReceiverType); 5284 5285 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5286 Selector Sel, 5287 SourceLocation LBracLoc, 5288 ArrayRef<SourceLocation> SelectorLocs, 5289 SourceLocation RBracLoc, 5290 MultiExprArg Args); 5291 5292 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5293 QualType ReceiverType, 5294 SourceLocation SuperLoc, 5295 Selector Sel, 5296 ObjCMethodDecl *Method, 5297 SourceLocation LBracLoc, 5298 ArrayRef<SourceLocation> SelectorLocs, 5299 SourceLocation RBracLoc, 5300 MultiExprArg Args); 5301 5302 ExprResult ActOnClassMessage(Scope *S, 5303 ParsedType Receiver, 5304 Selector Sel, 5305 SourceLocation LBracLoc, 5306 ArrayRef<SourceLocation> SelectorLocs, 5307 SourceLocation RBracLoc, 5308 MultiExprArg Args); 5309 5310 ExprResult BuildInstanceMessage(Expr *Receiver, 5311 QualType ReceiverType, 5312 SourceLocation SuperLoc, 5313 Selector Sel, 5314 ObjCMethodDecl *Method, 5315 SourceLocation LBracLoc, 5316 ArrayRef<SourceLocation> SelectorLocs, 5317 SourceLocation RBracLoc, 5318 MultiExprArg Args); 5319 5320 ExprResult ActOnInstanceMessage(Scope *S, 5321 Expr *Receiver, 5322 Selector Sel, 5323 SourceLocation LBracLoc, 5324 ArrayRef<SourceLocation> SelectorLocs, 5325 SourceLocation RBracLoc, 5326 MultiExprArg Args); 5327 5328 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5329 ObjCBridgeCastKind Kind, 5330 SourceLocation BridgeKeywordLoc, 5331 TypeSourceInfo *TSInfo, 5332 Expr *SubExpr); 5333 5334 ExprResult ActOnObjCBridgedCast(Scope *S, 5335 SourceLocation LParenLoc, 5336 ObjCBridgeCastKind Kind, 5337 SourceLocation BridgeKeywordLoc, 5338 ParsedType Type, 5339 SourceLocation RParenLoc, 5340 Expr *SubExpr); 5341 5342 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5343 5344 /// \brief Check whether the given new method is a valid override of the 5345 /// given overridden method, and set any properties that should be inherited. 5346 void CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5347 const ObjCMethodDecl *Overridden, 5348 bool IsImplementation); 5349 5350 /// \brief Check whether the given method overrides any methods in its class, 5351 /// calling \c CheckObjCMethodOverride for each overridden method. 5352 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5353 5354 enum PragmaOptionsAlignKind { 5355 POAK_Native, // #pragma options align=native 5356 POAK_Natural, // #pragma options align=natural 5357 POAK_Packed, // #pragma options align=packed 5358 POAK_Power, // #pragma options align=power 5359 POAK_Mac68k, // #pragma options align=mac68k 5360 POAK_Reset // #pragma options align=reset 5361 }; 5362 5363 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5364 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5365 SourceLocation PragmaLoc, 5366 SourceLocation KindLoc); 5367 5368 enum PragmaPackKind { 5369 PPK_Default, // #pragma pack([n]) 5370 PPK_Show, // #pragma pack(show), only supported by MSVC. 5371 PPK_Push, // #pragma pack(push, [identifier], [n]) 5372 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5373 }; 5374 5375 enum PragmaMSStructKind { 5376 PMSST_OFF, // #pragms ms_struct off 5377 PMSST_ON // #pragms ms_struct on 5378 }; 5379 5380 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5381 void ActOnPragmaPack(PragmaPackKind Kind, 5382 IdentifierInfo *Name, 5383 Expr *Alignment, 5384 SourceLocation PragmaLoc, 5385 SourceLocation LParenLoc, 5386 SourceLocation RParenLoc); 5387 5388 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5389 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5390 5391 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5392 void ActOnPragmaUnused(const Token &Identifier, 5393 Scope *curScope, 5394 SourceLocation PragmaLoc); 5395 5396 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5397 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 5398 SourceLocation PragmaLoc); 5399 5400 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II, 5401 SourceLocation Loc); 5402 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5403 5404 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5405 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5406 SourceLocation PragmaLoc, 5407 SourceLocation WeakNameLoc); 5408 5409 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5410 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5411 IdentifierInfo* AliasName, 5412 SourceLocation PragmaLoc, 5413 SourceLocation WeakNameLoc, 5414 SourceLocation AliasNameLoc); 5415 5416 /// ActOnPragmaFPContract - Called on well formed 5417 /// #pragma {STDC,OPENCL} FP_CONTRACT 5418 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5419 5420 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5421 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5422 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5423 5424 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5425 void AddMsStructLayoutForRecord(RecordDecl *RD); 5426 5427 /// FreePackedContext - Deallocate and null out PackContext. 5428 void FreePackedContext(); 5429 5430 /// PushNamespaceVisibilityAttr - Note that we've entered a 5431 /// namespace with a visibility attribute. 5432 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 5433 5434 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5435 /// add an appropriate visibility attribute. 5436 void AddPushedVisibilityAttribute(Decl *RD); 5437 5438 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5439 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5440 void PopPragmaVisibility(); 5441 5442 /// FreeVisContext - Deallocate and null out VisContext. 5443 void FreeVisContext(); 5444 5445 /// AddCFAuditedAttribute - Check whether we're currently within 5446 /// '#pragma clang arc_cf_code_audited' and, if so, consider adding 5447 /// the appropriate attribute. 5448 void AddCFAuditedAttribute(Decl *D); 5449 5450 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5451 void AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E); 5452 void AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *T); 5453 5454 /// \brief The kind of conversion being performed. 5455 enum CheckedConversionKind { 5456 /// \brief An implicit conversion. 5457 CCK_ImplicitConversion, 5458 /// \brief A C-style cast. 5459 CCK_CStyleCast, 5460 /// \brief A functional-style cast. 5461 CCK_FunctionalCast, 5462 /// \brief A cast other than a C-style cast. 5463 CCK_OtherCast 5464 }; 5465 5466 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5467 /// cast. If there is already an implicit cast, merge into the existing one. 5468 /// If isLvalue, the result of the cast is an lvalue. 5469 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5470 ExprValueKind VK = VK_RValue, 5471 const CXXCastPath *BasePath = 0, 5472 CheckedConversionKind CCK 5473 = CCK_ImplicitConversion); 5474 5475 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5476 /// to the conversion from scalar type ScalarTy to the Boolean type. 5477 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5478 5479 /// IgnoredValueConversions - Given that an expression's result is 5480 /// syntactically ignored, perform any conversions that are 5481 /// required. 5482 ExprResult IgnoredValueConversions(Expr *E); 5483 5484 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5485 // functions and arrays to their respective pointers (C99 6.3.2.1). 5486 ExprResult UsualUnaryConversions(Expr *E); 5487 5488 // DefaultFunctionArrayConversion - converts functions and arrays 5489 // to their respective pointers (C99 6.3.2.1). 5490 ExprResult DefaultFunctionArrayConversion(Expr *E); 5491 5492 // DefaultFunctionArrayLvalueConversion - converts functions and 5493 // arrays to their respective pointers and performs the 5494 // lvalue-to-rvalue conversion. 5495 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5496 5497 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5498 // the operand. This is DefaultFunctionArrayLvalueConversion, 5499 // except that it assumes the operand isn't of function or array 5500 // type. 5501 ExprResult DefaultLvalueConversion(Expr *E); 5502 5503 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5504 // do not have a prototype. Integer promotions are performed on each 5505 // argument, and arguments that have type float are promoted to double. 5506 ExprResult DefaultArgumentPromotion(Expr *E); 5507 5508 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5509 enum VariadicCallType { 5510 VariadicFunction, 5511 VariadicBlock, 5512 VariadicMethod, 5513 VariadicConstructor, 5514 VariadicDoesNotApply 5515 }; 5516 5517 /// GatherArgumentsForCall - Collector argument expressions for various 5518 /// form of call prototypes. 5519 bool GatherArgumentsForCall(SourceLocation CallLoc, 5520 FunctionDecl *FDecl, 5521 const FunctionProtoType *Proto, 5522 unsigned FirstProtoArg, 5523 Expr **Args, unsigned NumArgs, 5524 SmallVector<Expr *, 8> &AllArgs, 5525 VariadicCallType CallType = VariadicDoesNotApply); 5526 5527 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5528 // will warn if the resulting type is not a POD type. 5529 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5530 FunctionDecl *FDecl); 5531 5532 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5533 // operands and then handles various conversions that are common to binary 5534 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5535 // routine returns the first non-arithmetic type found. The client is 5536 // responsible for emitting appropriate error diagnostics. 5537 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS, 5538 bool IsCompAssign = false); 5539 5540 /// AssignConvertType - All of the 'assignment' semantic checks return this 5541 /// enum to indicate whether the assignment was allowed. These checks are 5542 /// done for simple assignments, as well as initialization, return from 5543 /// function, argument passing, etc. The query is phrased in terms of a 5544 /// source and destination type. 5545 enum AssignConvertType { 5546 /// Compatible - the types are compatible according to the standard. 5547 Compatible, 5548 5549 /// PointerToInt - The assignment converts a pointer to an int, which we 5550 /// accept as an extension. 5551 PointerToInt, 5552 5553 /// IntToPointer - The assignment converts an int to a pointer, which we 5554 /// accept as an extension. 5555 IntToPointer, 5556 5557 /// FunctionVoidPointer - The assignment is between a function pointer and 5558 /// void*, which the standard doesn't allow, but we accept as an extension. 5559 FunctionVoidPointer, 5560 5561 /// IncompatiblePointer - The assignment is between two pointers types that 5562 /// are not compatible, but we accept them as an extension. 5563 IncompatiblePointer, 5564 5565 /// IncompatiblePointer - The assignment is between two pointers types which 5566 /// point to integers which have a different sign, but are otherwise identical. 5567 /// This is a subset of the above, but broken out because it's by far the most 5568 /// common case of incompatible pointers. 5569 IncompatiblePointerSign, 5570 5571 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5572 /// c/v/r qualifiers, which we accept as an extension. 5573 CompatiblePointerDiscardsQualifiers, 5574 5575 /// IncompatiblePointerDiscardsQualifiers - The assignment 5576 /// discards qualifiers that we don't permit to be discarded, 5577 /// like address spaces. 5578 IncompatiblePointerDiscardsQualifiers, 5579 5580 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5581 /// nested pointer types, and the qualifiers other than the first two 5582 /// levels differ e.g. char ** -> const char **, but we accept them as an 5583 /// extension. 5584 IncompatibleNestedPointerQualifiers, 5585 5586 /// IncompatibleVectors - The assignment is between two vector types that 5587 /// have the same size, which we accept as an extension. 5588 IncompatibleVectors, 5589 5590 /// IntToBlockPointer - The assignment converts an int to a block 5591 /// pointer. We disallow this. 5592 IntToBlockPointer, 5593 5594 /// IncompatibleBlockPointer - The assignment is between two block 5595 /// pointers types that are not compatible. 5596 IncompatibleBlockPointer, 5597 5598 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5599 /// id type and something else (that is incompatible with it). For example, 5600 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5601 IncompatibleObjCQualifiedId, 5602 5603 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 5604 /// object with __weak qualifier. 5605 IncompatibleObjCWeakRef, 5606 5607 /// Incompatible - We reject this conversion outright, it is invalid to 5608 /// represent it in the AST. 5609 Incompatible 5610 }; 5611 5612 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5613 /// assignment conversion type specified by ConvTy. This returns true if the 5614 /// conversion was invalid or false if the conversion was accepted. 5615 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5616 SourceLocation Loc, 5617 QualType DstType, QualType SrcType, 5618 Expr *SrcExpr, AssignmentAction Action, 5619 bool *Complained = 0); 5620 5621 /// CheckAssignmentConstraints - Perform type checking for assignment, 5622 /// argument passing, variable initialization, and function return values. 5623 /// C99 6.5.16. 5624 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5625 QualType LHSType, 5626 QualType RHSType); 5627 5628 /// Check assignment constraints and prepare for a conversion of the 5629 /// RHS to the LHS type. 5630 AssignConvertType CheckAssignmentConstraints(QualType LHSType, 5631 ExprResult &RHS, 5632 CastKind &Kind); 5633 5634 // CheckSingleAssignmentConstraints - Currently used by 5635 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5636 // this routine performs the default function/array converions. 5637 AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType, 5638 ExprResult &RHS, 5639 bool Diagnose = true); 5640 5641 // \brief If the lhs type is a transparent union, check whether we 5642 // can initialize the transparent union with the given expression. 5643 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType, 5644 ExprResult &RHS); 5645 5646 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5647 5648 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5649 5650 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5651 AssignmentAction Action, 5652 bool AllowExplicit = false, 5653 bool Diagnose = true); 5654 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5655 AssignmentAction Action, 5656 bool AllowExplicit, 5657 ImplicitConversionSequence& ICS, 5658 bool Diagnose = true); 5659 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5660 const ImplicitConversionSequence& ICS, 5661 AssignmentAction Action, 5662 CheckedConversionKind CCK 5663 = CCK_ImplicitConversion); 5664 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5665 const StandardConversionSequence& SCS, 5666 AssignmentAction Action, 5667 CheckedConversionKind CCK); 5668 5669 /// the following "Check" methods will return a valid/converted QualType 5670 /// or a null QualType (indicating an error diagnostic was issued). 5671 5672 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5673 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS, 5674 ExprResult &RHS); 5675 QualType CheckPointerToMemberOperands( // C++ 5.5 5676 ExprResult &LHS, ExprResult &RHS, ExprValueKind &VK, 5677 SourceLocation OpLoc, bool isIndirect); 5678 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5679 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign, 5680 bool IsDivide); 5681 QualType CheckRemainderOperands( // C99 6.5.5 5682 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5683 bool IsCompAssign = false); 5684 QualType CheckAdditionOperands( // C99 6.5.6 5685 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5686 QualType* CompLHSTy = 0); 5687 QualType CheckSubtractionOperands( // C99 6.5.6 5688 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5689 QualType* CompLHSTy = 0); 5690 QualType CheckShiftOperands( // C99 6.5.7 5691 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 5692 bool IsCompAssign = false); 5693 QualType CheckCompareOperands( // C99 6.5.8/9 5694 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned OpaqueOpc, 5695 bool isRelational); 5696 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 5697 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5698 bool IsCompAssign = false); 5699 QualType CheckLogicalOperands( // C99 6.5.[13,14] 5700 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc); 5701 // CheckAssignmentOperands is used for both simple and compound assignment. 5702 // For simple assignment, pass both expressions and a null converted type. 5703 // For compound assignment, pass both expressions and the converted type. 5704 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 5705 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType); 5706 5707 void ConvertPropertyForLValue(ExprResult &LHS, ExprResult &RHS, 5708 QualType& LHSTy); 5709 ExprResult ConvertPropertyForRValue(Expr *E); 5710 5711 QualType CheckConditionalOperands( // C99 6.5.15 5712 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS, 5713 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc); 5714 QualType CXXCheckConditionalOperands( // C++ 5.16 5715 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5716 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5717 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 5718 bool *NonStandardCompositeType = 0); 5719 QualType FindCompositePointerType(SourceLocation Loc, ExprResult &E1, ExprResult &E2, 5720 bool *NonStandardCompositeType = 0) { 5721 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 5722 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, NonStandardCompositeType); 5723 E1 = Owned(E1Tmp); 5724 E2 = Owned(E2Tmp); 5725 return Composite; 5726 } 5727 5728 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5729 SourceLocation QuestionLoc); 5730 5731 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr, 5732 SourceLocation QuestionLoc); 5733 5734 /// type checking for vector binary operators. 5735 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS, 5736 SourceLocation Loc, bool IsCompAssign); 5737 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS, 5738 SourceLocation Loc, bool isRelational); 5739 5740 /// type checking declaration initializers (C99 6.7.8) 5741 bool CheckForConstantInitializer(Expr *e, QualType t); 5742 5743 // type checking C++ declaration initializers (C++ [dcl.init]). 5744 5745 /// ReferenceCompareResult - Expresses the result of comparing two 5746 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5747 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5748 enum ReferenceCompareResult { 5749 /// Ref_Incompatible - The two types are incompatible, so direct 5750 /// reference binding is not possible. 5751 Ref_Incompatible = 0, 5752 /// Ref_Related - The two types are reference-related, which means 5753 /// that their unqualified forms (T1 and T2) are either the same 5754 /// or T1 is a base class of T2. 5755 Ref_Related, 5756 /// Ref_Compatible_With_Added_Qualification - The two types are 5757 /// reference-compatible with added qualification, meaning that 5758 /// they are reference-compatible and the qualifiers on T1 (cv1) 5759 /// are greater than the qualifiers on T2 (cv2). 5760 Ref_Compatible_With_Added_Qualification, 5761 /// Ref_Compatible - The two types are reference-compatible and 5762 /// have equivalent qualifiers (cv1 == cv2). 5763 Ref_Compatible 5764 }; 5765 5766 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 5767 QualType T1, QualType T2, 5768 bool &DerivedToBase, 5769 bool &ObjCConversion, 5770 bool &ObjCLifetimeConversion); 5771 5772 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType, 5773 Expr *CastExpr, CastKind &CastKind, 5774 ExprValueKind &VK, CXXCastPath &Path); 5775 5776 // CheckVectorCast - check type constraints for vectors. 5777 // Since vectors are an extension, there are no C standard reference for this. 5778 // We allow casting between vectors and integer datatypes of the same size. 5779 // returns true if the cast is invalid 5780 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 5781 CastKind &Kind); 5782 5783 // CheckExtVectorCast - check type constraints for extended vectors. 5784 // Since vectors are an extension, there are no C standard reference for this. 5785 // We allow casting between vectors and integer datatypes of the same size, 5786 // or vectors and the element type of that vector. 5787 // returns the cast expr 5788 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr, 5789 CastKind &Kind); 5790 5791 ExprResult BuildCXXFunctionalCastExpr(TypeSourceInfo *TInfo, 5792 SourceLocation LParenLoc, 5793 Expr *CastExpr, 5794 SourceLocation RParenLoc); 5795 5796 /// \brief Checks for invalid conversions and casts between 5797 /// retainable pointers and other pointer kinds. 5798 void CheckObjCARCConversion(SourceRange castRange, QualType castType, 5799 Expr *&op, CheckedConversionKind CCK); 5800 5801 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 5802 QualType ExprType); 5803 5804 /// checkRetainCycles - Check whether an Objective-C message send 5805 /// might create an obvious retain cycle. 5806 void checkRetainCycles(ObjCMessageExpr *msg); 5807 void checkRetainCycles(Expr *receiver, Expr *argument); 5808 5809 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 5810 /// to weak/__unsafe_unretained type. 5811 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 5812 5813 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 5814 /// to weak/__unsafe_unretained expression. 5815 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 5816 5817 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 5818 /// \param Method - May be null. 5819 /// \param [out] ReturnType - The return type of the send. 5820 /// \return true iff there were any incompatible types. 5821 bool CheckMessageArgumentTypes(QualType ReceiverType, 5822 Expr **Args, unsigned NumArgs, Selector Sel, 5823 ObjCMethodDecl *Method, bool isClassMessage, 5824 bool isSuperMessage, 5825 SourceLocation lbrac, SourceLocation rbrac, 5826 QualType &ReturnType, ExprValueKind &VK); 5827 5828 /// \brief Determine the result of a message send expression based on 5829 /// the type of the receiver, the method expected to receive the message, 5830 /// and the form of the message send. 5831 QualType getMessageSendResultType(QualType ReceiverType, 5832 ObjCMethodDecl *Method, 5833 bool isClassMessage, bool isSuperMessage); 5834 5835 /// \brief If the given expression involves a message send to a method 5836 /// with a related result type, emit a note describing what happened. 5837 void EmitRelatedResultTypeNote(const Expr *E); 5838 5839 /// CheckBooleanCondition - Diagnose problems involving the use of 5840 /// the given expression as a boolean condition (e.g. in an if 5841 /// statement). Also performs the standard function and array 5842 /// decays, possibly changing the input variable. 5843 /// 5844 /// \param Loc - A location associated with the condition, e.g. the 5845 /// 'if' keyword. 5846 /// \return true iff there were any errors 5847 ExprResult CheckBooleanCondition(Expr *E, SourceLocation Loc); 5848 5849 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 5850 Expr *SubExpr); 5851 5852 /// DiagnoseAssignmentAsCondition - Given that an expression is 5853 /// being used as a boolean condition, warn if it's an assignment. 5854 void DiagnoseAssignmentAsCondition(Expr *E); 5855 5856 /// \brief Redundant parentheses over an equality comparison can indicate 5857 /// that the user intended an assignment used as condition. 5858 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE); 5859 5860 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 5861 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 5862 5863 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 5864 /// the specified width and sign. If an overflow occurs, detect it and emit 5865 /// the specified diagnostic. 5866 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 5867 unsigned NewWidth, bool NewSign, 5868 SourceLocation Loc, unsigned DiagID); 5869 5870 /// Checks that the Objective-C declaration is declared in the global scope. 5871 /// Emits an error and marks the declaration as invalid if it's not declared 5872 /// in the global scope. 5873 bool CheckObjCDeclScope(Decl *D); 5874 5875 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 5876 /// and reports the appropriate diagnostics. Returns false on success. 5877 /// Can optionally return the value of the expression. 5878 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 5879 5880 /// VerifyBitField - verifies that a bit field expression is an ICE and has 5881 /// the correct width, and that the field type is valid. 5882 /// Returns false on success. 5883 /// Can optionally return whether the bit-field is of width 0 5884 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 5885 QualType FieldTy, const Expr *BitWidth, 5886 bool *ZeroWidth = 0); 5887 5888 enum CUDAFunctionTarget { 5889 CFT_Device, 5890 CFT_Global, 5891 CFT_Host, 5892 CFT_HostDevice 5893 }; 5894 5895 CUDAFunctionTarget IdentifyCUDATarget(const FunctionDecl *D); 5896 5897 bool CheckCUDATarget(CUDAFunctionTarget CallerTarget, 5898 CUDAFunctionTarget CalleeTarget); 5899 5900 bool CheckCUDATarget(const FunctionDecl *Caller, const FunctionDecl *Callee) { 5901 return CheckCUDATarget(IdentifyCUDATarget(Caller), 5902 IdentifyCUDATarget(Callee)); 5903 } 5904 5905 /// \name Code completion 5906 //@{ 5907 /// \brief Describes the context in which code completion occurs. 5908 enum ParserCompletionContext { 5909 /// \brief Code completion occurs at top-level or namespace context. 5910 PCC_Namespace, 5911 /// \brief Code completion occurs within a class, struct, or union. 5912 PCC_Class, 5913 /// \brief Code completion occurs within an Objective-C interface, protocol, 5914 /// or category. 5915 PCC_ObjCInterface, 5916 /// \brief Code completion occurs within an Objective-C implementation or 5917 /// category implementation 5918 PCC_ObjCImplementation, 5919 /// \brief Code completion occurs within the list of instance variables 5920 /// in an Objective-C interface, protocol, category, or implementation. 5921 PCC_ObjCInstanceVariableList, 5922 /// \brief Code completion occurs following one or more template 5923 /// headers. 5924 PCC_Template, 5925 /// \brief Code completion occurs following one or more template 5926 /// headers within a class. 5927 PCC_MemberTemplate, 5928 /// \brief Code completion occurs within an expression. 5929 PCC_Expression, 5930 /// \brief Code completion occurs within a statement, which may 5931 /// also be an expression or a declaration. 5932 PCC_Statement, 5933 /// \brief Code completion occurs at the beginning of the 5934 /// initialization statement (or expression) in a for loop. 5935 PCC_ForInit, 5936 /// \brief Code completion occurs within the condition of an if, 5937 /// while, switch, or for statement. 5938 PCC_Condition, 5939 /// \brief Code completion occurs within the body of a function on a 5940 /// recovery path, where we do not have a specific handle on our position 5941 /// in the grammar. 5942 PCC_RecoveryInFunction, 5943 /// \brief Code completion occurs where only a type is permitted. 5944 PCC_Type, 5945 /// \brief Code completion occurs in a parenthesized expression, which 5946 /// might also be a type cast. 5947 PCC_ParenthesizedExpression, 5948 /// \brief Code completion occurs within a sequence of declaration 5949 /// specifiers within a function, method, or block. 5950 PCC_LocalDeclarationSpecifiers 5951 }; 5952 5953 void CodeCompleteOrdinaryName(Scope *S, 5954 ParserCompletionContext CompletionContext); 5955 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 5956 bool AllowNonIdentifiers, 5957 bool AllowNestedNameSpecifiers); 5958 5959 struct CodeCompleteExpressionData; 5960 void CodeCompleteExpression(Scope *S, 5961 const CodeCompleteExpressionData &Data); 5962 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 5963 SourceLocation OpLoc, 5964 bool IsArrow); 5965 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 5966 void CodeCompleteTag(Scope *S, unsigned TagSpec); 5967 void CodeCompleteTypeQualifiers(DeclSpec &DS); 5968 void CodeCompleteCase(Scope *S); 5969 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 5970 void CodeCompleteInitializer(Scope *S, Decl *D); 5971 void CodeCompleteReturn(Scope *S); 5972 void CodeCompleteAfterIf(Scope *S); 5973 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 5974 5975 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 5976 bool EnteringContext); 5977 void CodeCompleteUsing(Scope *S); 5978 void CodeCompleteUsingDirective(Scope *S); 5979 void CodeCompleteNamespaceDecl(Scope *S); 5980 void CodeCompleteNamespaceAliasDecl(Scope *S); 5981 void CodeCompleteOperatorName(Scope *S); 5982 void CodeCompleteConstructorInitializer(Decl *Constructor, 5983 CXXCtorInitializer** Initializers, 5984 unsigned NumInitializers); 5985 5986 void CodeCompleteObjCAtDirective(Scope *S); 5987 void CodeCompleteObjCAtVisibility(Scope *S); 5988 void CodeCompleteObjCAtStatement(Scope *S); 5989 void CodeCompleteObjCAtExpression(Scope *S); 5990 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 5991 void CodeCompleteObjCPropertyGetter(Scope *S); 5992 void CodeCompleteObjCPropertySetter(Scope *S); 5993 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 5994 bool IsParameter); 5995 void CodeCompleteObjCMessageReceiver(Scope *S); 5996 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 5997 IdentifierInfo **SelIdents, 5998 unsigned NumSelIdents, 5999 bool AtArgumentExpression); 6000 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 6001 IdentifierInfo **SelIdents, 6002 unsigned NumSelIdents, 6003 bool AtArgumentExpression, 6004 bool IsSuper = false); 6005 void CodeCompleteObjCInstanceMessage(Scope *S, Expr *Receiver, 6006 IdentifierInfo **SelIdents, 6007 unsigned NumSelIdents, 6008 bool AtArgumentExpression, 6009 ObjCInterfaceDecl *Super = 0); 6010 void CodeCompleteObjCForCollection(Scope *S, 6011 DeclGroupPtrTy IterationVar); 6012 void CodeCompleteObjCSelector(Scope *S, 6013 IdentifierInfo **SelIdents, 6014 unsigned NumSelIdents); 6015 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 6016 unsigned NumProtocols); 6017 void CodeCompleteObjCProtocolDecl(Scope *S); 6018 void CodeCompleteObjCInterfaceDecl(Scope *S); 6019 void CodeCompleteObjCSuperclass(Scope *S, 6020 IdentifierInfo *ClassName, 6021 SourceLocation ClassNameLoc); 6022 void CodeCompleteObjCImplementationDecl(Scope *S); 6023 void CodeCompleteObjCInterfaceCategory(Scope *S, 6024 IdentifierInfo *ClassName, 6025 SourceLocation ClassNameLoc); 6026 void CodeCompleteObjCImplementationCategory(Scope *S, 6027 IdentifierInfo *ClassName, 6028 SourceLocation ClassNameLoc); 6029 void CodeCompleteObjCPropertyDefinition(Scope *S); 6030 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 6031 IdentifierInfo *PropertyName); 6032 void CodeCompleteObjCMethodDecl(Scope *S, 6033 bool IsInstanceMethod, 6034 ParsedType ReturnType); 6035 void CodeCompleteObjCMethodDeclSelector(Scope *S, 6036 bool IsInstanceMethod, 6037 bool AtParameterName, 6038 ParsedType ReturnType, 6039 IdentifierInfo **SelIdents, 6040 unsigned NumSelIdents); 6041 void CodeCompletePreprocessorDirective(bool InConditional); 6042 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 6043 void CodeCompletePreprocessorMacroName(bool IsDefinition); 6044 void CodeCompletePreprocessorExpression(); 6045 void CodeCompletePreprocessorMacroArgument(Scope *S, 6046 IdentifierInfo *Macro, 6047 MacroInfo *MacroInfo, 6048 unsigned Argument); 6049 void CodeCompleteNaturalLanguage(); 6050 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 6051 SmallVectorImpl<CodeCompletionResult> &Results); 6052 //@} 6053 6054 //===--------------------------------------------------------------------===// 6055 // Extra semantic analysis beyond the C type system 6056 6057public: 6058 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 6059 unsigned ByteNo) const; 6060 6061private: 6062 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr, 6063 bool isSubscript=false, bool AllowOnePastEnd=true); 6064 void CheckArrayAccess(const Expr *E); 6065 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 6066 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 6067 6068 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 6069 bool CheckObjCString(Expr *Arg); 6070 6071 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6072 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6073 6074 bool SemaBuiltinVAStart(CallExpr *TheCall); 6075 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 6076 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 6077 6078public: 6079 // Used by C++ template instantiation. 6080 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 6081 6082private: 6083 bool SemaBuiltinPrefetch(CallExpr *TheCall); 6084 bool SemaBuiltinObjectSize(CallExpr *TheCall); 6085 bool SemaBuiltinLongjmp(CallExpr *TheCall); 6086 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 6087 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 6088 llvm::APSInt &Result); 6089 6090 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 6091 bool HasVAListArg, unsigned format_idx, 6092 unsigned firstDataArg, bool isPrintf); 6093 6094 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 6095 const CallExpr *TheCall, bool HasVAListArg, 6096 unsigned format_idx, unsigned firstDataArg, 6097 bool isPrintf); 6098 6099 void CheckNonNullArguments(const NonNullAttr *NonNull, 6100 const Expr * const *ExprArgs, 6101 SourceLocation CallSiteLoc); 6102 6103 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 6104 unsigned format_idx, unsigned firstDataArg, 6105 bool isPrintf); 6106 6107 /// \brief Enumeration used to describe which of the memory setting or copying 6108 /// functions is being checked by \c CheckMemaccessArguments(). 6109 enum CheckedMemoryFunction { 6110 CMF_Memset, 6111 CMF_Memcpy, 6112 CMF_Memmove, 6113 CMF_Memcmp 6114 }; 6115 6116 void CheckMemaccessArguments(const CallExpr *Call, CheckedMemoryFunction CMF, 6117 IdentifierInfo *FnName); 6118 6119 void CheckStrlcpycatArguments(const CallExpr *Call, 6120 IdentifierInfo *FnName); 6121 6122 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 6123 SourceLocation ReturnLoc); 6124 void CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr* RHS); 6125 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 6126 6127 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 6128 Expr *Init); 6129 6130 /// \brief The parser's current scope. 6131 /// 6132 /// The parser maintains this state here. 6133 Scope *CurScope; 6134 6135protected: 6136 friend class Parser; 6137 friend class InitializationSequence; 6138 friend class ASTReader; 6139 friend class ASTWriter; 6140 6141public: 6142 /// \brief Retrieve the parser's current scope. 6143 /// 6144 /// This routine must only be used when it is certain that semantic analysis 6145 /// and the parser are in precisely the same context, which is not the case 6146 /// when, e.g., we are performing any kind of template instantiation. 6147 /// Therefore, the only safe places to use this scope are in the parser 6148 /// itself and in routines directly invoked from the parser and *never* from 6149 /// template substitution or instantiation. 6150 Scope *getCurScope() const { return CurScope; } 6151 6152 Decl *getObjCDeclContext() const; 6153 6154 DeclContext *getCurLexicalContext() const { 6155 return OriginalLexicalContext ? OriginalLexicalContext : CurContext; 6156 } 6157 6158 AvailabilityResult getCurContextAvailability() const; 6159}; 6160 6161/// \brief RAII object that enters a new expression evaluation context. 6162class EnterExpressionEvaluationContext { 6163 Sema &Actions; 6164 6165public: 6166 EnterExpressionEvaluationContext(Sema &Actions, 6167 Sema::ExpressionEvaluationContext NewContext) 6168 : Actions(Actions) { 6169 Actions.PushExpressionEvaluationContext(NewContext); 6170 } 6171 6172 ~EnterExpressionEvaluationContext() { 6173 Actions.PopExpressionEvaluationContext(); 6174 } 6175}; 6176 6177} // end namespace clang 6178 6179#endif 6180