Sema.h revision 6a3bec320e5617922f1f15657dcdaeb22610ca23
1//===--- Sema.h - Semantic Analysis & AST Building --------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Sema class, which performs semantic analysis and 11// builds ASTs. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef LLVM_CLANG_SEMA_SEMA_H 16#define LLVM_CLANG_SEMA_SEMA_H 17 18#include "clang/Sema/Ownership.h" 19#include "clang/Sema/AnalysisBasedWarnings.h" 20#include "clang/Sema/IdentifierResolver.h" 21#include "clang/Sema/ObjCMethodList.h" 22#include "clang/Sema/DeclSpec.h" 23#include "clang/Sema/ExternalSemaSource.h" 24#include "clang/Sema/LocInfoType.h" 25#include "clang/Sema/TypoCorrection.h" 26#include "clang/Sema/Weak.h" 27#include "clang/AST/Expr.h" 28#include "clang/AST/DeclarationName.h" 29#include "clang/AST/ExternalASTSource.h" 30#include "clang/AST/TypeLoc.h" 31#include "clang/Basic/Specifiers.h" 32#include "clang/Basic/TemplateKinds.h" 33#include "clang/Basic/TypeTraits.h" 34#include "clang/Basic/ExpressionTraits.h" 35#include "llvm/ADT/OwningPtr.h" 36#include "llvm/ADT/SmallPtrSet.h" 37#include "llvm/ADT/SmallVector.h" 38#include <deque> 39#include <string> 40 41namespace llvm { 42 class APSInt; 43 template <typename ValueT> struct DenseMapInfo; 44 template <typename ValueT, typename ValueInfoT> class DenseSet; 45} 46 47namespace clang { 48 class ADLResult; 49 class ASTConsumer; 50 class ASTContext; 51 class ASTMutationListener; 52 class ASTReader; 53 class ASTWriter; 54 class ArrayType; 55 class AttributeList; 56 class BlockDecl; 57 class CXXBasePath; 58 class CXXBasePaths; 59 typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 60 class CXXConstructorDecl; 61 class CXXConversionDecl; 62 class CXXDestructorDecl; 63 class CXXFieldCollector; 64 class CXXMemberCallExpr; 65 class CXXMethodDecl; 66 class CXXScopeSpec; 67 class CXXTemporary; 68 class CXXTryStmt; 69 class CallExpr; 70 class ClassTemplateDecl; 71 class ClassTemplatePartialSpecializationDecl; 72 class ClassTemplateSpecializationDecl; 73 class CodeCompleteConsumer; 74 class CodeCompletionAllocator; 75 class CodeCompletionResult; 76 class Decl; 77 class DeclAccessPair; 78 class DeclContext; 79 class DeclRefExpr; 80 class DeclaratorDecl; 81 class DeducedTemplateArgument; 82 class DependentDiagnostic; 83 class DesignatedInitExpr; 84 class Designation; 85 class EnumConstantDecl; 86 class Expr; 87 class ExtVectorType; 88 class ExternalSemaSource; 89 class FormatAttr; 90 class FriendDecl; 91 class FunctionDecl; 92 class FunctionProtoType; 93 class FunctionTemplateDecl; 94 class ImplicitConversionSequence; 95 class InitListExpr; 96 class InitializationKind; 97 class InitializationSequence; 98 class InitializedEntity; 99 class IntegerLiteral; 100 class LabelStmt; 101 class LangOptions; 102 class LocalInstantiationScope; 103 class LookupResult; 104 class MacroInfo; 105 class MultiLevelTemplateArgumentList; 106 class NamedDecl; 107 class NonNullAttr; 108 class ObjCCategoryDecl; 109 class ObjCCategoryImplDecl; 110 class ObjCCompatibleAliasDecl; 111 class ObjCContainerDecl; 112 class ObjCImplDecl; 113 class ObjCImplementationDecl; 114 class ObjCInterfaceDecl; 115 class ObjCIvarDecl; 116 template <class T> class ObjCList; 117 class ObjCMessageExpr; 118 class ObjCMethodDecl; 119 class ObjCPropertyDecl; 120 class ObjCProtocolDecl; 121 class OverloadCandidateSet; 122 class OverloadExpr; 123 class ParenListExpr; 124 class ParmVarDecl; 125 class Preprocessor; 126 class PseudoDestructorTypeStorage; 127 class QualType; 128 class StandardConversionSequence; 129 class Stmt; 130 class StringLiteral; 131 class SwitchStmt; 132 class TargetAttributesSema; 133 class TemplateArgument; 134 class TemplateArgumentList; 135 class TemplateArgumentLoc; 136 class TemplateDecl; 137 class TemplateParameterList; 138 class TemplatePartialOrderingContext; 139 class TemplateTemplateParmDecl; 140 class Token; 141 class TypeAliasDecl; 142 class TypedefDecl; 143 class TypedefNameDecl; 144 class TypeLoc; 145 class UnqualifiedId; 146 class UnresolvedLookupExpr; 147 class UnresolvedMemberExpr; 148 class UnresolvedSetImpl; 149 class UnresolvedSetIterator; 150 class UsingDecl; 151 class UsingShadowDecl; 152 class ValueDecl; 153 class VarDecl; 154 class VisibilityAttr; 155 class VisibleDeclConsumer; 156 class IndirectFieldDecl; 157 158namespace sema { 159 class AccessedEntity; 160 class BlockScopeInfo; 161 class DelayedDiagnostic; 162 class FunctionScopeInfo; 163 class TemplateDeductionInfo; 164} 165 166// FIXME: No way to easily map from TemplateTypeParmTypes to 167// TemplateTypeParmDecls, so we have this horrible PointerUnion. 168typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 169 SourceLocation> UnexpandedParameterPack; 170 171/// Sema - This implements semantic analysis and AST building for C. 172class Sema { 173 Sema(const Sema&); // DO NOT IMPLEMENT 174 void operator=(const Sema&); // DO NOT IMPLEMENT 175 mutable const TargetAttributesSema* TheTargetAttributesSema; 176public: 177 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 178 typedef OpaquePtr<TemplateName> TemplateTy; 179 typedef OpaquePtr<QualType> TypeTy; 180 typedef Attr AttrTy; 181 typedef CXXBaseSpecifier BaseTy; 182 typedef CXXCtorInitializer MemInitTy; 183 typedef Expr ExprTy; 184 typedef Stmt StmtTy; 185 typedef TemplateParameterList TemplateParamsTy; 186 typedef NestedNameSpecifier CXXScopeTy; 187 188 OpenCLOptions OpenCLFeatures; 189 FPOptions FPFeatures; 190 191 const LangOptions &LangOpts; 192 Preprocessor &PP; 193 ASTContext &Context; 194 ASTConsumer &Consumer; 195 Diagnostic &Diags; 196 SourceManager &SourceMgr; 197 198 /// \brief Flag indicating whether or not to collect detailed statistics. 199 bool CollectStats; 200 201 /// \brief Source of additional semantic information. 202 ExternalSemaSource *ExternalSource; 203 204 /// \brief Code-completion consumer. 205 CodeCompleteConsumer *CodeCompleter; 206 207 /// CurContext - This is the current declaration context of parsing. 208 DeclContext *CurContext; 209 210 /// VAListTagName - The declaration name corresponding to __va_list_tag. 211 /// This is used as part of a hack to omit that class from ADL results. 212 DeclarationName VAListTagName; 213 214 /// PackContext - Manages the stack for #pragma pack. An alignment 215 /// of 0 indicates default alignment. 216 void *PackContext; // Really a "PragmaPackStack*" 217 218 bool MSStructPragmaOn; // True when #pragma ms_struct on 219 220 /// VisContext - Manages the stack for #pragma GCC visibility. 221 void *VisContext; // Really a "PragmaVisStack*" 222 223 /// ExprNeedsCleanups - True if the current evaluation context 224 /// requires cleanups to be run at its conclusion. 225 bool ExprNeedsCleanups; 226 227 /// \brief Stack containing information about each of the nested 228 /// function, block, and method scopes that are currently active. 229 /// 230 /// This array is never empty. Clients should ignore the first 231 /// element, which is used to cache a single FunctionScopeInfo 232 /// that's used to parse every top-level function. 233 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 234 235 /// ExprTemporaries - This is the stack of temporaries that are created by 236 /// the current full expression. 237 SmallVector<CXXTemporary*, 8> ExprTemporaries; 238 239 typedef LazyVector<TypedefNameDecl *, ExternalSemaSource, 240 &ExternalSemaSource::ReadExtVectorDecls, 2, 2> 241 ExtVectorDeclsType; 242 243 /// ExtVectorDecls - This is a list all the extended vector types. This allows 244 /// us to associate a raw vector type with one of the ext_vector type names. 245 /// This is only necessary for issuing pretty diagnostics. 246 ExtVectorDeclsType ExtVectorDecls; 247 248 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 249 llvm::OwningPtr<CXXFieldCollector> FieldCollector; 250 251 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 252 253 /// PureVirtualClassDiagSet - a set of class declarations which we have 254 /// emitted a list of pure virtual functions. Used to prevent emitting the 255 /// same list more than once. 256 llvm::OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 257 258 /// ParsingInitForAutoVars - a set of declarations with auto types for which 259 /// we are currently parsing the initializer. 260 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 261 262 /// \brief A mapping from external names to the most recent 263 /// locally-scoped external declaration with that name. 264 /// 265 /// This map contains external declarations introduced in local 266 /// scoped, e.g., 267 /// 268 /// \code 269 /// void f() { 270 /// void foo(int, int); 271 /// } 272 /// \endcode 273 /// 274 /// Here, the name "foo" will be associated with the declaration on 275 /// "foo" within f. This name is not visible outside of 276 /// "f". However, we still find it in two cases: 277 /// 278 /// - If we are declaring another external with the name "foo", we 279 /// can find "foo" as a previous declaration, so that the types 280 /// of this external declaration can be checked for 281 /// compatibility. 282 /// 283 /// - If we would implicitly declare "foo" (e.g., due to a call to 284 /// "foo" in C when no prototype or definition is visible), then 285 /// we find this declaration of "foo" and complain that it is 286 /// not visible. 287 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 288 289 /// \brief Look for a locally scoped external declaration by the given name. 290 llvm::DenseMap<DeclarationName, NamedDecl *>::iterator 291 findLocallyScopedExternalDecl(DeclarationName Name); 292 293 typedef LazyVector<VarDecl *, ExternalSemaSource, 294 &ExternalSemaSource::ReadTentativeDefinitions, 2, 2> 295 TentativeDefinitionsType; 296 297 /// \brief All the tentative definitions encountered in the TU. 298 TentativeDefinitionsType TentativeDefinitions; 299 300 typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource, 301 &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2> 302 UnusedFileScopedDeclsType; 303 304 /// \brief The set of file scoped decls seen so far that have not been used 305 /// and must warn if not used. Only contains the first declaration. 306 UnusedFileScopedDeclsType UnusedFileScopedDecls; 307 308 typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource, 309 &ExternalSemaSource::ReadDelegatingConstructors, 2, 2> 310 DelegatingCtorDeclsType; 311 312 /// \brief All the delegating constructors seen so far in the file, used for 313 /// cycle detection at the end of the TU. 314 DelegatingCtorDeclsType DelegatingCtorDecls; 315 316 /// \brief All the overriding destructors seen during a class definition 317 /// (there could be multiple due to nested classes) that had their exception 318 /// spec checks delayed, plus the overridden destructor. 319 SmallVector<std::pair<const CXXDestructorDecl*, 320 const CXXDestructorDecl*>, 2> 321 DelayedDestructorExceptionSpecChecks; 322 323 /// \brief Callback to the parser to parse templated functions when needed. 324 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 325 LateTemplateParserCB *LateTemplateParser; 326 void *OpaqueParser; 327 328 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 329 LateTemplateParser = LTP; 330 OpaqueParser = P; 331 } 332 333 class DelayedDiagnostics; 334 335 class ParsingDeclState { 336 unsigned SavedStackSize; 337 friend class Sema::DelayedDiagnostics; 338 }; 339 340 class ProcessingContextState { 341 unsigned SavedParsingDepth; 342 unsigned SavedActiveStackBase; 343 friend class Sema::DelayedDiagnostics; 344 }; 345 346 /// A class which encapsulates the logic for delaying diagnostics 347 /// during parsing and other processing. 348 class DelayedDiagnostics { 349 /// \brief The stack of diagnostics that were delayed due to being 350 /// produced during the parsing of a declaration. 351 sema::DelayedDiagnostic *Stack; 352 353 /// \brief The number of objects on the delayed-diagnostics stack. 354 unsigned StackSize; 355 356 /// \brief The current capacity of the delayed-diagnostics stack. 357 unsigned StackCapacity; 358 359 /// \brief The index of the first "active" delayed diagnostic in 360 /// the stack. When parsing class definitions, we ignore active 361 /// delayed diagnostics from the surrounding context. 362 unsigned ActiveStackBase; 363 364 /// \brief The depth of the declarations we're currently parsing. 365 /// This gets saved and reset whenever we enter a class definition. 366 unsigned ParsingDepth; 367 368 public: 369 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 370 ActiveStackBase(0), ParsingDepth(0) {} 371 372 ~DelayedDiagnostics() { 373 delete[] reinterpret_cast<char*>(Stack); 374 } 375 376 /// Adds a delayed diagnostic. 377 void add(const sema::DelayedDiagnostic &diag); 378 379 /// Determines whether diagnostics should be delayed. 380 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 381 382 /// Observe that we've started parsing a declaration. Access and 383 /// deprecation diagnostics will be delayed; when the declaration 384 /// is completed, all active delayed diagnostics will be evaluated 385 /// in its context, and then active diagnostics stack will be 386 /// popped down to the saved depth. 387 ParsingDeclState pushParsingDecl() { 388 ParsingDepth++; 389 390 ParsingDeclState state; 391 state.SavedStackSize = StackSize; 392 return state; 393 } 394 395 /// Observe that we're completed parsing a declaration. 396 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 397 398 /// Observe that we've started processing a different context, the 399 /// contents of which are semantically separate from the 400 /// declarations it may lexically appear in. This sets aside the 401 /// current stack of active diagnostics and starts afresh. 402 ProcessingContextState pushContext() { 403 assert(StackSize >= ActiveStackBase); 404 405 ProcessingContextState state; 406 state.SavedParsingDepth = ParsingDepth; 407 state.SavedActiveStackBase = ActiveStackBase; 408 409 ActiveStackBase = StackSize; 410 ParsingDepth = 0; 411 412 return state; 413 } 414 415 /// Observe that we've stopped processing a context. This 416 /// restores the previous stack of active diagnostics. 417 void popContext(ProcessingContextState state) { 418 assert(ActiveStackBase == StackSize); 419 assert(ParsingDepth == 0); 420 ActiveStackBase = state.SavedActiveStackBase; 421 ParsingDepth = state.SavedParsingDepth; 422 } 423 } DelayedDiagnostics; 424 425 /// A RAII object to temporarily push a declaration context. 426 class ContextRAII { 427 private: 428 Sema &S; 429 DeclContext *SavedContext; 430 ProcessingContextState SavedContextState; 431 432 public: 433 ContextRAII(Sema &S, DeclContext *ContextToPush) 434 : S(S), SavedContext(S.CurContext), 435 SavedContextState(S.DelayedDiagnostics.pushContext()) 436 { 437 assert(ContextToPush && "pushing null context"); 438 S.CurContext = ContextToPush; 439 } 440 441 void pop() { 442 if (!SavedContext) return; 443 S.CurContext = SavedContext; 444 S.DelayedDiagnostics.popContext(SavedContextState); 445 SavedContext = 0; 446 } 447 448 ~ContextRAII() { 449 pop(); 450 } 451 }; 452 453 /// WeakUndeclaredIdentifiers - Identifiers contained in 454 /// #pragma weak before declared. rare. may alias another 455 /// identifier, declared or undeclared 456 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 457 458 /// \brief Load weak undeclared identifiers from the external source. 459 void LoadExternalWeakUndeclaredIdentifiers(); 460 461 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 462 /// #pragma weak during processing of other Decls. 463 /// I couldn't figure out a clean way to generate these in-line, so 464 /// we store them here and handle separately -- which is a hack. 465 /// It would be best to refactor this. 466 SmallVector<Decl*,2> WeakTopLevelDecl; 467 468 IdentifierResolver IdResolver; 469 470 /// Translation Unit Scope - useful to Objective-C actions that need 471 /// to lookup file scope declarations in the "ordinary" C decl namespace. 472 /// For example, user-defined classes, built-in "id" type, etc. 473 Scope *TUScope; 474 475 /// \brief The C++ "std" namespace, where the standard library resides. 476 LazyDeclPtr StdNamespace; 477 478 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 479 /// standard library. 480 LazyDeclPtr StdBadAlloc; 481 482 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 483 RecordDecl *CXXTypeInfoDecl; 484 485 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 486 RecordDecl *MSVCGuidDecl; 487 488 /// A flag to remember whether the implicit forms of operator new and delete 489 /// have been declared. 490 bool GlobalNewDeleteDeclared; 491 492 /// \brief The set of declarations that have been referenced within 493 /// a potentially evaluated expression. 494 typedef SmallVector<std::pair<SourceLocation, Decl *>, 10> 495 PotentiallyReferencedDecls; 496 497 // FIXME. Improve on accessibility. 498 class PROTOCOL_METHODS { 499 public: 500 Selector Sel; 501 ObjCMethodDecl *Method; 502 PROTOCOL_METHODS(Selector S, ObjCMethodDecl *M) 503 : Sel(S), Method(M) {} 504 // Allow sorting based on selector's opaque pointer. 505 bool operator<(const PROTOCOL_METHODS &b) const { 506 return Sel < b.Sel; 507 } 508 }; 509 510 /// \brief The set of protocols declared in protocols qualifying a 511 /// class. 512 typedef SmallVector<PROTOCOL_METHODS, 16> MethodsInProtocols; 513 514 /// \brief A set of diagnostics that may be emitted. 515 typedef SmallVector<std::pair<SourceLocation, PartialDiagnostic>, 10> 516 PotentiallyEmittedDiagnostics; 517 518 /// \brief Describes how the expressions currently being parsed are 519 /// evaluated at run-time, if at all. 520 enum ExpressionEvaluationContext { 521 /// \brief The current expression and its subexpressions occur within an 522 /// unevaluated operand (C++0x [expr]p8), such as a constant expression 523 /// or the subexpression of \c sizeof, where the type or the value of the 524 /// expression may be significant but no code will be generated to evaluate 525 /// the value of the expression at run time. 526 Unevaluated, 527 528 /// \brief The current expression is potentially evaluated at run time, 529 /// which means that code may be generated to evaluate the value of the 530 /// expression at run time. 531 PotentiallyEvaluated, 532 533 /// \brief The current expression may be potentially evaluated or it may 534 /// be unevaluated, but it is impossible to tell from the lexical context. 535 /// This evaluation context is used primary for the operand of the C++ 536 /// \c typeid expression, whose argument is potentially evaluated only when 537 /// it is an lvalue of polymorphic class type (C++ [basic.def.odr]p2). 538 PotentiallyPotentiallyEvaluated, 539 540 /// \brief The current expression is potentially evaluated, but any 541 /// declarations referenced inside that expression are only used if 542 /// in fact the current expression is used. 543 /// 544 /// This value is used when parsing default function arguments, for which 545 /// we would like to provide diagnostics (e.g., passing non-POD arguments 546 /// through varargs) but do not want to mark declarations as "referenced" 547 /// until the default argument is used. 548 PotentiallyEvaluatedIfUsed 549 }; 550 551 /// \brief Data structure used to record current or nested 552 /// expression evaluation contexts. 553 struct ExpressionEvaluationContextRecord { 554 /// \brief The expression evaluation context. 555 ExpressionEvaluationContext Context; 556 557 /// \brief Whether the enclosing context needed a cleanup. 558 bool ParentNeedsCleanups; 559 560 /// \brief The number of temporaries that were active when we 561 /// entered this expression evaluation context. 562 unsigned NumTemporaries; 563 564 /// \brief The set of declarations referenced within a 565 /// potentially potentially-evaluated context. 566 /// 567 /// When leaving a potentially potentially-evaluated context, each 568 /// of these elements will be as referenced if the corresponding 569 /// potentially potentially evaluated expression is potentially 570 /// evaluated. 571 PotentiallyReferencedDecls *PotentiallyReferenced; 572 573 /// \brief The set of diagnostics to emit should this potentially 574 /// potentially-evaluated context become evaluated. 575 PotentiallyEmittedDiagnostics *PotentiallyDiagnosed; 576 577 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 578 unsigned NumTemporaries, 579 bool ParentNeedsCleanups) 580 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups), 581 NumTemporaries(NumTemporaries), 582 PotentiallyReferenced(0), PotentiallyDiagnosed(0) { } 583 584 void addReferencedDecl(SourceLocation Loc, Decl *Decl) { 585 if (!PotentiallyReferenced) 586 PotentiallyReferenced = new PotentiallyReferencedDecls; 587 PotentiallyReferenced->push_back(std::make_pair(Loc, Decl)); 588 } 589 590 void addDiagnostic(SourceLocation Loc, const PartialDiagnostic &PD) { 591 if (!PotentiallyDiagnosed) 592 PotentiallyDiagnosed = new PotentiallyEmittedDiagnostics; 593 PotentiallyDiagnosed->push_back(std::make_pair(Loc, PD)); 594 } 595 596 void Destroy() { 597 delete PotentiallyReferenced; 598 delete PotentiallyDiagnosed; 599 PotentiallyReferenced = 0; 600 PotentiallyDiagnosed = 0; 601 } 602 }; 603 604 /// A stack of expression evaluation contexts. 605 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 606 607 /// SpecialMemberOverloadResult - The overloading result for a special member 608 /// function. 609 /// 610 /// This is basically a wrapper around PointerIntPair. The lowest bit of the 611 /// integer is used to determine whether we have a parameter qualification 612 /// match, the second-lowest is whether we had success in resolving the 613 /// overload to a unique non-deleted function. 614 /// 615 /// The ConstParamMatch bit represents whether, when looking up a copy 616 /// constructor or assignment operator, we found a potential copy 617 /// constructor/assignment operator whose first parameter is const-qualified. 618 /// This is used for determining parameter types of other objects and is 619 /// utterly meaningless on other types of special members. 620 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 621 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 622 public: 623 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 624 : FastFoldingSetNode(ID) 625 {} 626 627 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 628 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 629 630 bool hasSuccess() const { return Pair.getInt() & 0x1; } 631 void setSuccess(bool B) { 632 Pair.setInt(unsigned(B) | hasConstParamMatch() << 1); 633 } 634 635 bool hasConstParamMatch() const { return Pair.getInt() & 0x2; } 636 void setConstParamMatch(bool B) { 637 Pair.setInt(B << 1 | unsigned(hasSuccess())); 638 } 639 }; 640 641 /// \brief A cache of special member function overload resolution results 642 /// for C++ records. 643 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 644 645 /// \brief Whether the code handled by Sema should be considered a 646 /// complete translation unit or not. 647 /// 648 /// When true (which is generally the case), Sema will perform 649 /// end-of-translation-unit semantic tasks (such as creating 650 /// initializers for tentative definitions in C) once parsing has 651 /// completed. This flag will be false when building PCH files, 652 /// since a PCH file is by definition not a complete translation 653 /// unit. 654 bool CompleteTranslationUnit; 655 656 llvm::BumpPtrAllocator BumpAlloc; 657 658 /// \brief The number of SFINAE diagnostics that have been trapped. 659 unsigned NumSFINAEErrors; 660 661 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> > 662 UnparsedDefaultArgInstantiationsMap; 663 664 /// \brief A mapping from parameters with unparsed default arguments to the 665 /// set of instantiations of each parameter. 666 /// 667 /// This mapping is a temporary data structure used when parsing 668 /// nested class templates or nested classes of class templates, 669 /// where we might end up instantiating an inner class before the 670 /// default arguments of its methods have been parsed. 671 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 672 673 // Contains the locations of the beginning of unparsed default 674 // argument locations. 675 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 676 677 /// UndefinedInternals - all the used, undefined objects with 678 /// internal linkage in this translation unit. 679 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 680 681 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 682 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 683 684 /// Method Pool - allows efficient lookup when typechecking messages to "id". 685 /// We need to maintain a list, since selectors can have differing signatures 686 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 687 /// of selectors are "overloaded"). 688 GlobalMethodPool MethodPool; 689 690 /// Method selectors used in a @selector expression. Used for implementation 691 /// of -Wselector. 692 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 693 694 GlobalMethodPool::iterator ReadMethodPool(Selector Sel); 695 696 /// Private Helper predicate to check for 'self'. 697 bool isSelfExpr(Expr *RExpr); 698public: 699 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 700 bool CompleteTranslationUnit = true, 701 CodeCompleteConsumer *CompletionConsumer = 0); 702 ~Sema(); 703 704 /// \brief Perform initialization that occurs after the parser has been 705 /// initialized but before it parses anything. 706 void Initialize(); 707 708 const LangOptions &getLangOptions() const { return LangOpts; } 709 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 710 FPOptions &getFPOptions() { return FPFeatures; } 711 712 Diagnostic &getDiagnostics() const { return Diags; } 713 SourceManager &getSourceManager() const { return SourceMgr; } 714 const TargetAttributesSema &getTargetAttributesSema() const; 715 Preprocessor &getPreprocessor() const { return PP; } 716 ASTContext &getASTContext() const { return Context; } 717 ASTConsumer &getASTConsumer() const { return Consumer; } 718 ASTMutationListener *getASTMutationListener() const; 719 720 void PrintStats() const; 721 722 /// \brief Helper class that creates diagnostics with optional 723 /// template instantiation stacks. 724 /// 725 /// This class provides a wrapper around the basic DiagnosticBuilder 726 /// class that emits diagnostics. SemaDiagnosticBuilder is 727 /// responsible for emitting the diagnostic (as DiagnosticBuilder 728 /// does) and, if the diagnostic comes from inside a template 729 /// instantiation, printing the template instantiation stack as 730 /// well. 731 class SemaDiagnosticBuilder : public DiagnosticBuilder { 732 Sema &SemaRef; 733 unsigned DiagID; 734 735 public: 736 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 737 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 738 739 explicit SemaDiagnosticBuilder(Sema &SemaRef) 740 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 741 742 ~SemaDiagnosticBuilder(); 743 }; 744 745 /// \brief Emit a diagnostic. 746 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 747 748 /// \brief Emit a partial diagnostic. 749 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 750 751 /// \brief Build a partial diagnostic. 752 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 753 754 bool findMacroSpelling(SourceLocation &loc, StringRef name); 755 756 ExprResult Owned(Expr* E) { return E; } 757 ExprResult Owned(ExprResult R) { return R; } 758 StmtResult Owned(Stmt* S) { return S; } 759 760 void ActOnEndOfTranslationUnit(); 761 762 void CheckDelegatingCtorCycles(); 763 764 Scope *getScopeForContext(DeclContext *Ctx); 765 766 void PushFunctionScope(); 767 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 768 void PopFunctionOrBlockScope(const sema::AnalysisBasedWarnings::Policy *WP =0, 769 const Decl *D = 0, const BlockExpr *blkExpr = 0); 770 771 sema::FunctionScopeInfo *getCurFunction() const { 772 return FunctionScopes.back(); 773 } 774 775 bool hasAnyUnrecoverableErrorsInThisFunction() const; 776 777 /// \brief Retrieve the current block, if any. 778 sema::BlockScopeInfo *getCurBlock(); 779 780 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 781 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 782 783 //===--------------------------------------------------------------------===// 784 // Type Analysis / Processing: SemaType.cpp. 785 // 786 787 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 788 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 789 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 790 } 791 QualType BuildPointerType(QualType T, 792 SourceLocation Loc, DeclarationName Entity); 793 QualType BuildReferenceType(QualType T, bool LValueRef, 794 SourceLocation Loc, DeclarationName Entity); 795 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 796 Expr *ArraySize, unsigned Quals, 797 SourceRange Brackets, DeclarationName Entity); 798 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 799 SourceLocation AttrLoc); 800 QualType BuildFunctionType(QualType T, 801 QualType *ParamTypes, unsigned NumParamTypes, 802 bool Variadic, unsigned Quals, 803 RefQualifierKind RefQualifier, 804 SourceLocation Loc, DeclarationName Entity, 805 FunctionType::ExtInfo Info); 806 QualType BuildMemberPointerType(QualType T, QualType Class, 807 SourceLocation Loc, 808 DeclarationName Entity); 809 QualType BuildBlockPointerType(QualType T, 810 SourceLocation Loc, DeclarationName Entity); 811 QualType BuildParenType(QualType T); 812 813 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); 814 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); 815 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 816 TypeSourceInfo *ReturnTypeInfo); 817 /// \brief Package the given type and TSI into a ParsedType. 818 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 819 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 820 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 821 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 822 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 823 bool CheckDistantExceptionSpec(QualType T); 824 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 825 bool CheckEquivalentExceptionSpec( 826 const FunctionProtoType *Old, SourceLocation OldLoc, 827 const FunctionProtoType *New, SourceLocation NewLoc); 828 bool CheckEquivalentExceptionSpec( 829 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 830 const FunctionProtoType *Old, SourceLocation OldLoc, 831 const FunctionProtoType *New, SourceLocation NewLoc, 832 bool *MissingExceptionSpecification = 0, 833 bool *MissingEmptyExceptionSpecification = 0, 834 bool AllowNoexceptAllMatchWithNoSpec = false, 835 bool IsOperatorNew = false); 836 bool CheckExceptionSpecSubset( 837 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 838 const FunctionProtoType *Superset, SourceLocation SuperLoc, 839 const FunctionProtoType *Subset, SourceLocation SubLoc); 840 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 841 const FunctionProtoType *Target, SourceLocation TargetLoc, 842 const FunctionProtoType *Source, SourceLocation SourceLoc); 843 844 TypeResult ActOnTypeName(Scope *S, Declarator &D); 845 846 bool RequireCompleteType(SourceLocation Loc, QualType T, 847 const PartialDiagnostic &PD, 848 std::pair<SourceLocation, PartialDiagnostic> Note); 849 bool RequireCompleteType(SourceLocation Loc, QualType T, 850 const PartialDiagnostic &PD); 851 bool RequireCompleteType(SourceLocation Loc, QualType T, 852 unsigned DiagID); 853 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 854 std::pair<SourceLocation, 855 PartialDiagnostic> Note); 856 857 858 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 859 const CXXScopeSpec &SS, QualType T); 860 861 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 862 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 863 QualType BuildUnaryTransformType(QualType BaseType, 864 UnaryTransformType::UTTKind UKind, 865 SourceLocation Loc); 866 867 //===--------------------------------------------------------------------===// 868 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 869 // 870 871 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 872 873 void DiagnoseUseOfUnimplementedSelectors(); 874 875 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 876 Scope *S, CXXScopeSpec *SS = 0, 877 bool isClassName = false, 878 bool HasTrailingDot = false, 879 ParsedType ObjectType = ParsedType(), 880 bool WantNontrivialTypeSourceInfo = false); 881 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 882 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS); 883 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 884 SourceLocation IILoc, 885 Scope *S, 886 CXXScopeSpec *SS, 887 ParsedType &SuggestedType); 888 889 /// \brief Describes the result of the name lookup and resolution performed 890 /// by \c ClassifyName(). 891 enum NameClassificationKind { 892 NC_Unknown, 893 NC_Error, 894 NC_Keyword, 895 NC_Type, 896 NC_Expression, 897 NC_NestedNameSpecifier, 898 NC_TypeTemplate, 899 NC_FunctionTemplate 900 }; 901 902 class NameClassification { 903 NameClassificationKind Kind; 904 ExprResult Expr; 905 TemplateName Template; 906 ParsedType Type; 907 const IdentifierInfo *Keyword; 908 909 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 910 911 public: 912 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 913 914 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 915 916 NameClassification(const IdentifierInfo *Keyword) 917 : Kind(NC_Keyword), Keyword(Keyword) { } 918 919 static NameClassification Error() { 920 return NameClassification(NC_Error); 921 } 922 923 static NameClassification Unknown() { 924 return NameClassification(NC_Unknown); 925 } 926 927 static NameClassification NestedNameSpecifier() { 928 return NameClassification(NC_NestedNameSpecifier); 929 } 930 931 static NameClassification TypeTemplate(TemplateName Name) { 932 NameClassification Result(NC_TypeTemplate); 933 Result.Template = Name; 934 return Result; 935 } 936 937 static NameClassification FunctionTemplate(TemplateName Name) { 938 NameClassification Result(NC_FunctionTemplate); 939 Result.Template = Name; 940 return Result; 941 } 942 943 NameClassificationKind getKind() const { return Kind; } 944 945 ParsedType getType() const { 946 assert(Kind == NC_Type); 947 return Type; 948 } 949 950 ExprResult getExpression() const { 951 assert(Kind == NC_Expression); 952 return Expr; 953 } 954 955 TemplateName getTemplateName() const { 956 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 957 return Template; 958 } 959 960 TemplateNameKind getTemplateNameKind() const { 961 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 962 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 963 } 964}; 965 966 /// \brief Perform name lookup on the given name, classifying it based on 967 /// the results of name lookup and the following token. 968 /// 969 /// This routine is used by the parser to resolve identifiers and help direct 970 /// parsing. When the identifier cannot be found, this routine will attempt 971 /// to correct the typo and classify based on the resulting name. 972 /// 973 /// \param S The scope in which we're performing name lookup. 974 /// 975 /// \param SS The nested-name-specifier that precedes the name. 976 /// 977 /// \param Name The identifier. If typo correction finds an alternative name, 978 /// this pointer parameter will be updated accordingly. 979 /// 980 /// \param NameLoc The location of the identifier. 981 /// 982 /// \param NextToken The token following the identifier. Used to help 983 /// disambiguate the name. 984 NameClassification ClassifyName(Scope *S, 985 CXXScopeSpec &SS, 986 IdentifierInfo *&Name, 987 SourceLocation NameLoc, 988 const Token &NextToken); 989 990 Decl *ActOnDeclarator(Scope *S, Declarator &D); 991 992 Decl *HandleDeclarator(Scope *S, Declarator &D, 993 MultiTemplateParamsArg TemplateParameterLists, 994 bool IsFunctionDefinition); 995 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 996 const LookupResult &Previous, 997 Scope *S); 998 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 999 void DiagnoseFunctionSpecifiers(Declarator& D); 1000 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 1001 void CheckShadow(Scope *S, VarDecl *D); 1002 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 1003 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 1004 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1005 QualType R, TypeSourceInfo *TInfo, 1006 LookupResult &Previous, bool &Redeclaration); 1007 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 1008 LookupResult &Previous, bool &Redeclaration); 1009 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1010 QualType R, TypeSourceInfo *TInfo, 1011 LookupResult &Previous, 1012 MultiTemplateParamsArg TemplateParamLists, 1013 bool &Redeclaration); 1014 void CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous, 1015 bool &Redeclaration); 1016 void CheckCompleteVariableDeclaration(VarDecl *var); 1017 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1018 QualType R, TypeSourceInfo *TInfo, 1019 LookupResult &Previous, 1020 MultiTemplateParamsArg TemplateParamLists, 1021 bool IsFunctionDefinition, 1022 bool &Redeclaration); 1023 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1024 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1025 void CheckFunctionDeclaration(Scope *S, 1026 FunctionDecl *NewFD, LookupResult &Previous, 1027 bool IsExplicitSpecialization, 1028 bool &Redeclaration); 1029 void CheckMain(FunctionDecl *FD); 1030 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1031 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1032 SourceLocation Loc, 1033 QualType T); 1034 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1035 SourceLocation NameLoc, IdentifierInfo *Name, 1036 QualType T, TypeSourceInfo *TSInfo, 1037 StorageClass SC, StorageClass SCAsWritten); 1038 void ActOnParamDefaultArgument(Decl *param, 1039 SourceLocation EqualLoc, 1040 Expr *defarg); 1041 void ActOnParamUnparsedDefaultArgument(Decl *param, 1042 SourceLocation EqualLoc, 1043 SourceLocation ArgLoc); 1044 void ActOnParamDefaultArgumentError(Decl *param); 1045 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1046 SourceLocation EqualLoc); 1047 1048 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1049 bool TypeMayContainAuto); 1050 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1051 void ActOnInitializerError(Decl *Dcl); 1052 void ActOnCXXForRangeDecl(Decl *D); 1053 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1054 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1055 void FinalizeDeclaration(Decl *D); 1056 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1057 Decl **Group, 1058 unsigned NumDecls); 1059 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1060 bool TypeMayContainAuto = true); 1061 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1062 SourceLocation LocAfterDecls); 1063 void CheckForFunctionRedefinition(FunctionDecl *FD); 1064 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1065 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1066 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1067 1068 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1069 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1070 1071 /// \brief Diagnose any unused parameters in the given sequence of 1072 /// ParmVarDecl pointers. 1073 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1074 ParmVarDecl * const *End); 1075 1076 /// \brief Diagnose whether the size of parameters or return value of a 1077 /// function or obj-c method definition is pass-by-value and larger than a 1078 /// specified threshold. 1079 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1080 ParmVarDecl * const *End, 1081 QualType ReturnTy, 1082 NamedDecl *D); 1083 1084 void DiagnoseInvalidJumps(Stmt *Body); 1085 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1086 SourceLocation AsmLoc, 1087 SourceLocation RParenLoc); 1088 1089 /// Scope actions. 1090 void ActOnPopScope(SourceLocation Loc, Scope *S); 1091 void ActOnTranslationUnitScope(Scope *S); 1092 1093 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1094 DeclSpec &DS); 1095 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1096 DeclSpec &DS, 1097 MultiTemplateParamsArg TemplateParams); 1098 1099 StmtResult ActOnVlaStmt(const DeclSpec &DS); 1100 1101 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1102 AccessSpecifier AS, 1103 RecordDecl *Record); 1104 1105 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1106 RecordDecl *Record); 1107 1108 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1109 TagTypeKind NewTag, bool isDefinition, 1110 SourceLocation NewTagLoc, 1111 const IdentifierInfo &Name); 1112 1113 enum TagUseKind { 1114 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1115 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1116 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1117 TUK_Friend // Friend declaration: 'friend struct foo;' 1118 }; 1119 1120 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1121 SourceLocation KWLoc, CXXScopeSpec &SS, 1122 IdentifierInfo *Name, SourceLocation NameLoc, 1123 AttributeList *Attr, AccessSpecifier AS, 1124 MultiTemplateParamsArg TemplateParameterLists, 1125 bool &OwnedDecl, bool &IsDependent, bool ScopedEnum, 1126 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1127 1128 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1129 unsigned TagSpec, SourceLocation TagLoc, 1130 CXXScopeSpec &SS, 1131 IdentifierInfo *Name, SourceLocation NameLoc, 1132 AttributeList *Attr, 1133 MultiTemplateParamsArg TempParamLists); 1134 1135 TypeResult ActOnDependentTag(Scope *S, 1136 unsigned TagSpec, 1137 TagUseKind TUK, 1138 const CXXScopeSpec &SS, 1139 IdentifierInfo *Name, 1140 SourceLocation TagLoc, 1141 SourceLocation NameLoc); 1142 1143 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1144 IdentifierInfo *ClassName, 1145 SmallVectorImpl<Decl *> &Decls); 1146 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1147 Declarator &D, Expr *BitfieldWidth); 1148 1149 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1150 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1151 AccessSpecifier AS); 1152 1153 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1154 TypeSourceInfo *TInfo, 1155 RecordDecl *Record, SourceLocation Loc, 1156 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1157 SourceLocation TSSL, 1158 AccessSpecifier AS, NamedDecl *PrevDecl, 1159 Declarator *D = 0); 1160 1161 enum CXXSpecialMember { 1162 CXXDefaultConstructor, 1163 CXXCopyConstructor, 1164 CXXMoveConstructor, 1165 CXXCopyAssignment, 1166 CXXMoveAssignment, 1167 CXXDestructor, 1168 CXXInvalid 1169 }; 1170 bool CheckNontrivialField(FieldDecl *FD); 1171 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1172 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1173 void ActOnLastBitfield(SourceLocation DeclStart, Decl *IntfDecl, 1174 SmallVectorImpl<Decl *> &AllIvarDecls); 1175 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, Decl *IntfDecl, 1176 Declarator &D, Expr *BitfieldWidth, 1177 tok::ObjCKeywordKind visibility); 1178 1179 // This is used for both record definitions and ObjC interface declarations. 1180 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1181 Decl **Fields, unsigned NumFields, 1182 SourceLocation LBrac, SourceLocation RBrac, 1183 AttributeList *AttrList); 1184 1185 /// ActOnTagStartDefinition - Invoked when we have entered the 1186 /// scope of a tag's definition (e.g., for an enumeration, class, 1187 /// struct, or union). 1188 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1189 1190 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1191 /// C++ record definition's base-specifiers clause and are starting its 1192 /// member declarations. 1193 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1194 SourceLocation FinalLoc, 1195 SourceLocation LBraceLoc); 1196 1197 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1198 /// the definition of a tag (enumeration, class, struct, or union). 1199 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1200 SourceLocation RBraceLoc); 1201 1202 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1203 /// error parsing the definition of a tag. 1204 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1205 1206 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1207 EnumConstantDecl *LastEnumConst, 1208 SourceLocation IdLoc, 1209 IdentifierInfo *Id, 1210 Expr *val); 1211 1212 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1213 SourceLocation IdLoc, IdentifierInfo *Id, 1214 AttributeList *Attrs, 1215 SourceLocation EqualLoc, Expr *Val); 1216 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1217 SourceLocation RBraceLoc, Decl *EnumDecl, 1218 Decl **Elements, unsigned NumElements, 1219 Scope *S, AttributeList *Attr); 1220 1221 DeclContext *getContainingDC(DeclContext *DC); 1222 1223 /// Set the current declaration context until it gets popped. 1224 void PushDeclContext(Scope *S, DeclContext *DC); 1225 void PopDeclContext(); 1226 1227 /// EnterDeclaratorContext - Used when we must lookup names in the context 1228 /// of a declarator's nested name specifier. 1229 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1230 void ExitDeclaratorContext(Scope *S); 1231 1232 DeclContext *getFunctionLevelDeclContext(); 1233 1234 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1235 /// to the function decl for the function being parsed. If we're currently 1236 /// in a 'block', this returns the containing context. 1237 FunctionDecl *getCurFunctionDecl(); 1238 1239 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1240 /// the method decl for the method being parsed. If we're currently 1241 /// in a 'block', this returns the containing context. 1242 ObjCMethodDecl *getCurMethodDecl(); 1243 1244 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1245 /// or C function we're in, otherwise return null. If we're currently 1246 /// in a 'block', this returns the containing context. 1247 NamedDecl *getCurFunctionOrMethodDecl(); 1248 1249 /// Add this decl to the scope shadowed decl chains. 1250 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1251 1252 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1253 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1254 /// true if 'D' belongs to the given declaration context. 1255 /// 1256 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1257 /// whether the declaration is in scope for the purposes of explicit template 1258 /// instantiation or specialization. The default is false. 1259 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1260 bool ExplicitInstantiationOrSpecialization = false); 1261 1262 /// Finds the scope corresponding to the given decl context, if it 1263 /// happens to be an enclosing scope. Otherwise return NULL. 1264 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1265 1266 /// Subroutines of ActOnDeclarator(). 1267 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1268 TypeSourceInfo *TInfo); 1269 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1270 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1271 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1272 void mergeObjCMethodDecls(ObjCMethodDecl *New, const ObjCMethodDecl *Old); 1273 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1274 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1275 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1276 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1277 1278 // AssignmentAction - This is used by all the assignment diagnostic functions 1279 // to represent what is actually causing the operation 1280 enum AssignmentAction { 1281 AA_Assigning, 1282 AA_Passing, 1283 AA_Returning, 1284 AA_Converting, 1285 AA_Initializing, 1286 AA_Sending, 1287 AA_Casting 1288 }; 1289 1290 /// C++ Overloading. 1291 enum OverloadKind { 1292 /// This is a legitimate overload: the existing declarations are 1293 /// functions or function templates with different signatures. 1294 Ovl_Overload, 1295 1296 /// This is not an overload because the signature exactly matches 1297 /// an existing declaration. 1298 Ovl_Match, 1299 1300 /// This is not an overload because the lookup results contain a 1301 /// non-function. 1302 Ovl_NonFunction 1303 }; 1304 OverloadKind CheckOverload(Scope *S, 1305 FunctionDecl *New, 1306 const LookupResult &OldDecls, 1307 NamedDecl *&OldDecl, 1308 bool IsForUsingDecl); 1309 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1310 1311 /// \brief Checks availability of the function depending on the current 1312 /// function context.Inside an unavailable function,unavailability is ignored. 1313 /// 1314 /// \returns true if \arg FD is unavailable and current context is inside 1315 /// an available function, false otherwise. 1316 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1317 1318 ImplicitConversionSequence 1319 TryImplicitConversion(Expr *From, QualType ToType, 1320 bool SuppressUserConversions, 1321 bool AllowExplicit, 1322 bool InOverloadResolution, 1323 bool CStyle, 1324 bool AllowObjCWritebackConversion); 1325 1326 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1327 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1328 bool IsComplexPromotion(QualType FromType, QualType ToType); 1329 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1330 bool InOverloadResolution, 1331 QualType& ConvertedType, bool &IncompatibleObjC); 1332 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1333 QualType& ConvertedType, bool &IncompatibleObjC); 1334 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1335 QualType &ConvertedType); 1336 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1337 QualType& ConvertedType); 1338 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1339 const FunctionProtoType *NewType); 1340 1341 bool CheckPointerConversion(Expr *From, QualType ToType, 1342 CastKind &Kind, 1343 CXXCastPath& BasePath, 1344 bool IgnoreBaseAccess); 1345 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1346 bool InOverloadResolution, 1347 QualType &ConvertedType); 1348 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1349 CastKind &Kind, 1350 CXXCastPath &BasePath, 1351 bool IgnoreBaseAccess); 1352 bool IsQualificationConversion(QualType FromType, QualType ToType, 1353 bool CStyle, bool &ObjCLifetimeConversion); 1354 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1355 QualType &ResultTy); 1356 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1357 1358 1359 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1360 const VarDecl *NRVOCandidate, 1361 QualType ResultType, 1362 Expr *Value, 1363 bool AllowNRVO = true); 1364 1365 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1366 ExprResult Init); 1367 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1368 SourceLocation EqualLoc, 1369 ExprResult Init, 1370 bool TopLevelOfInitList = false); 1371 ExprResult PerformObjectArgumentInitialization(Expr *From, 1372 NestedNameSpecifier *Qualifier, 1373 NamedDecl *FoundDecl, 1374 CXXMethodDecl *Method); 1375 1376 ExprResult PerformContextuallyConvertToBool(Expr *From); 1377 ExprResult PerformContextuallyConvertToObjCId(Expr *From); 1378 1379 ExprResult 1380 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1381 const PartialDiagnostic &NotIntDiag, 1382 const PartialDiagnostic &IncompleteDiag, 1383 const PartialDiagnostic &ExplicitConvDiag, 1384 const PartialDiagnostic &ExplicitConvNote, 1385 const PartialDiagnostic &AmbigDiag, 1386 const PartialDiagnostic &AmbigNote, 1387 const PartialDiagnostic &ConvDiag); 1388 1389 ExprResult PerformObjectMemberConversion(Expr *From, 1390 NestedNameSpecifier *Qualifier, 1391 NamedDecl *FoundDecl, 1392 NamedDecl *Member); 1393 1394 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1395 // TODO: make this is a typesafe union. 1396 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1397 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1398 1399 void AddOverloadCandidate(NamedDecl *Function, 1400 DeclAccessPair FoundDecl, 1401 Expr **Args, unsigned NumArgs, 1402 OverloadCandidateSet &CandidateSet); 1403 1404 void AddOverloadCandidate(FunctionDecl *Function, 1405 DeclAccessPair FoundDecl, 1406 Expr **Args, unsigned NumArgs, 1407 OverloadCandidateSet& CandidateSet, 1408 bool SuppressUserConversions = false, 1409 bool PartialOverloading = false); 1410 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1411 Expr **Args, unsigned NumArgs, 1412 OverloadCandidateSet& CandidateSet, 1413 bool SuppressUserConversions = false); 1414 void AddMethodCandidate(DeclAccessPair FoundDecl, 1415 QualType ObjectType, 1416 Expr::Classification ObjectClassification, 1417 Expr **Args, unsigned NumArgs, 1418 OverloadCandidateSet& CandidateSet, 1419 bool SuppressUserConversion = false); 1420 void AddMethodCandidate(CXXMethodDecl *Method, 1421 DeclAccessPair FoundDecl, 1422 CXXRecordDecl *ActingContext, QualType ObjectType, 1423 Expr::Classification ObjectClassification, 1424 Expr **Args, unsigned NumArgs, 1425 OverloadCandidateSet& CandidateSet, 1426 bool SuppressUserConversions = false); 1427 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1428 DeclAccessPair FoundDecl, 1429 CXXRecordDecl *ActingContext, 1430 TemplateArgumentListInfo *ExplicitTemplateArgs, 1431 QualType ObjectType, 1432 Expr::Classification ObjectClassification, 1433 Expr **Args, unsigned NumArgs, 1434 OverloadCandidateSet& CandidateSet, 1435 bool SuppressUserConversions = false); 1436 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1437 DeclAccessPair FoundDecl, 1438 TemplateArgumentListInfo *ExplicitTemplateArgs, 1439 Expr **Args, unsigned NumArgs, 1440 OverloadCandidateSet& CandidateSet, 1441 bool SuppressUserConversions = false); 1442 void AddConversionCandidate(CXXConversionDecl *Conversion, 1443 DeclAccessPair FoundDecl, 1444 CXXRecordDecl *ActingContext, 1445 Expr *From, QualType ToType, 1446 OverloadCandidateSet& CandidateSet); 1447 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1448 DeclAccessPair FoundDecl, 1449 CXXRecordDecl *ActingContext, 1450 Expr *From, QualType ToType, 1451 OverloadCandidateSet &CandidateSet); 1452 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1453 DeclAccessPair FoundDecl, 1454 CXXRecordDecl *ActingContext, 1455 const FunctionProtoType *Proto, 1456 Expr *Object, Expr **Args, unsigned NumArgs, 1457 OverloadCandidateSet& CandidateSet); 1458 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1459 SourceLocation OpLoc, 1460 Expr **Args, unsigned NumArgs, 1461 OverloadCandidateSet& CandidateSet, 1462 SourceRange OpRange = SourceRange()); 1463 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1464 Expr **Args, unsigned NumArgs, 1465 OverloadCandidateSet& CandidateSet, 1466 bool IsAssignmentOperator = false, 1467 unsigned NumContextualBoolArguments = 0); 1468 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1469 SourceLocation OpLoc, 1470 Expr **Args, unsigned NumArgs, 1471 OverloadCandidateSet& CandidateSet); 1472 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1473 bool Operator, 1474 Expr **Args, unsigned NumArgs, 1475 TemplateArgumentListInfo *ExplicitTemplateArgs, 1476 OverloadCandidateSet& CandidateSet, 1477 bool PartialOverloading = false, 1478 bool StdNamespaceIsAssociated = false); 1479 1480 // Emit as a 'note' the specific overload candidate 1481 void NoteOverloadCandidate(FunctionDecl *Fn); 1482 1483 // Emit as a series of 'note's all template and non-templates 1484 // identified by the expression Expr 1485 void NoteAllOverloadCandidates(Expr* E); 1486 1487 // [PossiblyAFunctionType] --> [Return] 1488 // NonFunctionType --> NonFunctionType 1489 // R (A) --> R(A) 1490 // R (*)(A) --> R (A) 1491 // R (&)(A) --> R (A) 1492 // R (S::*)(A) --> R (A) 1493 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1494 1495 FunctionDecl *ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, QualType TargetType, 1496 bool Complain, 1497 DeclAccessPair &Found); 1498 1499 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1500 bool Complain = false, 1501 DeclAccessPair* Found = 0); 1502 1503 ExprResult ResolveAndFixSingleFunctionTemplateSpecialization( 1504 Expr *SrcExpr, bool DoFunctionPointerConverion = false, 1505 bool Complain = false, 1506 const SourceRange& OpRangeForComplaining = SourceRange(), 1507 QualType DestTypeForComplaining = QualType(), 1508 unsigned DiagIDForComplaining = 0); 1509 1510 1511 Expr *FixOverloadedFunctionReference(Expr *E, 1512 DeclAccessPair FoundDecl, 1513 FunctionDecl *Fn); 1514 ExprResult FixOverloadedFunctionReference(ExprResult, 1515 DeclAccessPair FoundDecl, 1516 FunctionDecl *Fn); 1517 1518 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1519 Expr **Args, unsigned NumArgs, 1520 OverloadCandidateSet &CandidateSet, 1521 bool PartialOverloading = false); 1522 1523 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1524 UnresolvedLookupExpr *ULE, 1525 SourceLocation LParenLoc, 1526 Expr **Args, unsigned NumArgs, 1527 SourceLocation RParenLoc, 1528 Expr *ExecConfig); 1529 1530 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1531 unsigned Opc, 1532 const UnresolvedSetImpl &Fns, 1533 Expr *input); 1534 1535 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1536 unsigned Opc, 1537 const UnresolvedSetImpl &Fns, 1538 Expr *LHS, Expr *RHS); 1539 1540 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1541 SourceLocation RLoc, 1542 Expr *Base,Expr *Idx); 1543 1544 ExprResult 1545 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1546 SourceLocation LParenLoc, Expr **Args, 1547 unsigned NumArgs, SourceLocation RParenLoc); 1548 ExprResult 1549 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1550 Expr **Args, unsigned NumArgs, 1551 SourceLocation RParenLoc); 1552 1553 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1554 SourceLocation OpLoc); 1555 1556 /// CheckCallReturnType - Checks that a call expression's return type is 1557 /// complete. Returns true on failure. The location passed in is the location 1558 /// that best represents the call. 1559 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1560 CallExpr *CE, FunctionDecl *FD); 1561 1562 /// Helpers for dealing with blocks and functions. 1563 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1564 bool CheckParameterNames); 1565 void CheckCXXDefaultArguments(FunctionDecl *FD); 1566 void CheckExtraCXXDefaultArguments(Declarator &D); 1567 Scope *getNonFieldDeclScope(Scope *S); 1568 1569 /// \name Name lookup 1570 /// 1571 /// These routines provide name lookup that is used during semantic 1572 /// analysis to resolve the various kinds of names (identifiers, 1573 /// overloaded operator names, constructor names, etc.) into zero or 1574 /// more declarations within a particular scope. The major entry 1575 /// points are LookupName, which performs unqualified name lookup, 1576 /// and LookupQualifiedName, which performs qualified name lookup. 1577 /// 1578 /// All name lookup is performed based on some specific criteria, 1579 /// which specify what names will be visible to name lookup and how 1580 /// far name lookup should work. These criteria are important both 1581 /// for capturing language semantics (certain lookups will ignore 1582 /// certain names, for example) and for performance, since name 1583 /// lookup is often a bottleneck in the compilation of C++. Name 1584 /// lookup criteria is specified via the LookupCriteria enumeration. 1585 /// 1586 /// The results of name lookup can vary based on the kind of name 1587 /// lookup performed, the current language, and the translation 1588 /// unit. In C, for example, name lookup will either return nothing 1589 /// (no entity found) or a single declaration. In C++, name lookup 1590 /// can additionally refer to a set of overloaded functions or 1591 /// result in an ambiguity. All of the possible results of name 1592 /// lookup are captured by the LookupResult class, which provides 1593 /// the ability to distinguish among them. 1594 //@{ 1595 1596 /// @brief Describes the kind of name lookup to perform. 1597 enum LookupNameKind { 1598 /// Ordinary name lookup, which finds ordinary names (functions, 1599 /// variables, typedefs, etc.) in C and most kinds of names 1600 /// (functions, variables, members, types, etc.) in C++. 1601 LookupOrdinaryName = 0, 1602 /// Tag name lookup, which finds the names of enums, classes, 1603 /// structs, and unions. 1604 LookupTagName, 1605 /// Label name lookup. 1606 LookupLabel, 1607 /// Member name lookup, which finds the names of 1608 /// class/struct/union members. 1609 LookupMemberName, 1610 /// Look up of an operator name (e.g., operator+) for use with 1611 /// operator overloading. This lookup is similar to ordinary name 1612 /// lookup, but will ignore any declarations that are class members. 1613 LookupOperatorName, 1614 /// Look up of a name that precedes the '::' scope resolution 1615 /// operator in C++. This lookup completely ignores operator, object, 1616 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1617 LookupNestedNameSpecifierName, 1618 /// Look up a namespace name within a C++ using directive or 1619 /// namespace alias definition, ignoring non-namespace names (C++ 1620 /// [basic.lookup.udir]p1). 1621 LookupNamespaceName, 1622 /// Look up all declarations in a scope with the given name, 1623 /// including resolved using declarations. This is appropriate 1624 /// for checking redeclarations for a using declaration. 1625 LookupUsingDeclName, 1626 /// Look up an ordinary name that is going to be redeclared as a 1627 /// name with linkage. This lookup ignores any declarations that 1628 /// are outside of the current scope unless they have linkage. See 1629 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1630 LookupRedeclarationWithLinkage, 1631 /// Look up the name of an Objective-C protocol. 1632 LookupObjCProtocolName, 1633 /// Look up implicit 'self' parameter of an objective-c method. 1634 LookupObjCImplicitSelfParam, 1635 /// \brief Look up any declaration with any name. 1636 LookupAnyName 1637 }; 1638 1639 /// \brief Specifies whether (or how) name lookup is being performed for a 1640 /// redeclaration (vs. a reference). 1641 enum RedeclarationKind { 1642 /// \brief The lookup is a reference to this name that is not for the 1643 /// purpose of redeclaring the name. 1644 NotForRedeclaration = 0, 1645 /// \brief The lookup results will be used for redeclaration of a name, 1646 /// if an entity by that name already exists. 1647 ForRedeclaration 1648 }; 1649 1650private: 1651 bool CppLookupName(LookupResult &R, Scope *S); 1652 1653 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1654 CXXSpecialMember SM, 1655 bool ConstArg, 1656 bool VolatileArg, 1657 bool RValueThis, 1658 bool ConstThis, 1659 bool VolatileThis); 1660 1661 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1662 // 1663 // The boolean value will be true to indicate that the namespace was loaded 1664 // from an AST/PCH file, or false otherwise. 1665 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1666 1667 /// \brief Whether we have already loaded known namespaces from an extenal 1668 /// source. 1669 bool LoadedExternalKnownNamespaces; 1670 1671public: 1672 /// \brief Look up a name, looking for a single declaration. Return 1673 /// null if the results were absent, ambiguous, or overloaded. 1674 /// 1675 /// It is preferable to use the elaborated form and explicitly handle 1676 /// ambiguity and overloaded. 1677 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1678 SourceLocation Loc, 1679 LookupNameKind NameKind, 1680 RedeclarationKind Redecl 1681 = NotForRedeclaration); 1682 bool LookupName(LookupResult &R, Scope *S, 1683 bool AllowBuiltinCreation = false); 1684 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1685 bool InUnqualifiedLookup = false); 1686 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1687 bool AllowBuiltinCreation = false, 1688 bool EnteringContext = false); 1689 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1690 1691 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1692 QualType T1, QualType T2, 1693 UnresolvedSetImpl &Functions); 1694 1695 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1696 SourceLocation GnuLabelLoc = SourceLocation()); 1697 1698 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1699 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1700 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1701 unsigned Quals, 1702 bool *ConstParam = 0); 1703 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1704 bool RValueThis, unsigned ThisQuals, 1705 bool *ConstParam = 0); 1706 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1707 1708 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1709 Expr **Args, unsigned NumArgs, 1710 ADLResult &Functions, 1711 bool StdNamespaceIsAssociated = false); 1712 1713 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1714 VisibleDeclConsumer &Consumer, 1715 bool IncludeGlobalScope = true); 1716 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1717 VisibleDeclConsumer &Consumer, 1718 bool IncludeGlobalScope = true); 1719 1720 /// \brief The context in which typo-correction occurs. 1721 /// 1722 /// The typo-correction context affects which keywords (if any) are 1723 /// considered when trying to correct for typos. 1724 enum CorrectTypoContext { 1725 /// \brief An unknown context, where any keyword might be valid. 1726 CTC_Unknown, 1727 /// \brief A context where no keywords are used (e.g. we expect an actual 1728 /// name). 1729 CTC_NoKeywords, 1730 /// \brief A context where we're correcting a type name. 1731 CTC_Type, 1732 /// \brief An expression context. 1733 CTC_Expression, 1734 /// \brief A type cast, or anything else that can be followed by a '<'. 1735 CTC_CXXCasts, 1736 /// \brief A member lookup context. 1737 CTC_MemberLookup, 1738 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1739 CTC_ObjCIvarLookup, 1740 /// \brief An Objective-C property lookup context (e.g., self.prop). 1741 CTC_ObjCPropertyLookup, 1742 /// \brief The receiver of an Objective-C message send within an 1743 /// Objective-C method where 'super' is a valid keyword. 1744 CTC_ObjCMessageReceiver 1745 }; 1746 1747 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1748 Sema::LookupNameKind LookupKind, 1749 Scope *S, CXXScopeSpec *SS, 1750 DeclContext *MemberContext = NULL, 1751 bool EnteringContext = false, 1752 CorrectTypoContext CTC = CTC_Unknown, 1753 const ObjCObjectPointerType *OPT = NULL); 1754 1755 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1756 AssociatedNamespaceSet &AssociatedNamespaces, 1757 AssociatedClassSet &AssociatedClasses); 1758 1759 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1760 bool ConsiderLinkage, 1761 bool ExplicitInstantiationOrSpecialization); 1762 1763 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1764 //@} 1765 1766 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1767 SourceLocation IdLoc, 1768 bool TypoCorrection = false); 1769 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1770 Scope *S, bool ForRedeclaration, 1771 SourceLocation Loc); 1772 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1773 Scope *S); 1774 void AddKnownFunctionAttributes(FunctionDecl *FD); 1775 1776 // More parsing and symbol table subroutines. 1777 1778 // Decl attributes - this routine is the top level dispatcher. 1779 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1780 bool NonInheritable = true, bool Inheritable = true); 1781 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1782 bool NonInheritable = true, bool Inheritable = true); 1783 1784 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1785 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1786 bool CheckNoReturnAttr(const AttributeList &attr); 1787 1788 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1789 bool &IncompleteImpl, unsigned DiagID); 1790 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 1791 ObjCMethodDecl *MethodDecl, 1792 bool IsProtocolMethodDecl, 1793 bool IsDeclaration = false); 1794 1795 /// WarnExactTypedMethods - This routine issues a warning if method 1796 /// implementation declaration matches exactly that of its declaration. 1797 void WarnExactTypedMethods(ObjCMethodDecl *Method, 1798 ObjCMethodDecl *MethodDecl, 1799 bool IsProtocolMethodDecl); 1800 1801 /// WarnOnMismatchedProtocolMethods - Issues warning on type mismatched 1802 /// protocols methods and then returns true(matched), or false(mismatched). 1803 bool WarnOnMismatchedProtocolMethods(ObjCMethodDecl *Method, 1804 ObjCMethodDecl *MethodDecl); 1805 1806 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1807 ObjCInterfaceDecl *IDecl); 1808 1809 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1810 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap; 1811 1812 /// CheckProtocolMethodDefs - This routine checks unimplemented 1813 /// methods declared in protocol, and those referenced by it. 1814 /// \param IDecl - Used for checking for methods which may have been 1815 /// inherited. 1816 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1817 ObjCProtocolDecl *PDecl, 1818 bool& IncompleteImpl, 1819 const SelectorSet &InsMap, 1820 const SelectorSet &ClsMap, 1821 ObjCContainerDecl *CDecl); 1822 1823 /// CheckImplementationIvars - This routine checks if the instance variables 1824 /// listed in the implelementation match those listed in the interface. 1825 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1826 ObjCIvarDecl **Fields, unsigned nIvars, 1827 SourceLocation Loc); 1828 1829 /// \brief Determine whether we can synthesize a provisional ivar for the 1830 /// given name. 1831 ObjCPropertyDecl *canSynthesizeProvisionalIvar(IdentifierInfo *II); 1832 1833 /// \brief Determine whether we can synthesize a provisional ivar for the 1834 /// given property. 1835 bool canSynthesizeProvisionalIvar(ObjCPropertyDecl *Property); 1836 1837 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1838 /// remains unimplemented in the class or category @implementation. 1839 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1840 ObjCContainerDecl* IDecl, 1841 bool IncompleteImpl = false); 1842 1843 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1844 /// which must be implemented by this implementation. 1845 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1846 ObjCContainerDecl *CDecl, 1847 const SelectorSet &InsMap); 1848 1849 /// DefaultSynthesizeProperties - This routine default synthesizes all 1850 /// properties which must be synthesized in class's @implementation. 1851 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1852 ObjCInterfaceDecl *IDecl); 1853 1854 /// CollectImmediateProperties - This routine collects all properties in 1855 /// the class and its conforming protocols; but not those it its super class. 1856 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1857 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1858 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1859 1860 1861 /// LookupPropertyDecl - Looks up a property in the current class and all 1862 /// its protocols. 1863 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1864 IdentifierInfo *II); 1865 1866 /// Called by ActOnProperty to handle @property declarations in 1867 //// class extensions. 1868 Decl *HandlePropertyInClassExtension(Scope *S, 1869 ObjCCategoryDecl *CDecl, 1870 SourceLocation AtLoc, 1871 FieldDeclarator &FD, 1872 Selector GetterSel, 1873 Selector SetterSel, 1874 const bool isAssign, 1875 const bool isReadWrite, 1876 const unsigned Attributes, 1877 bool *isOverridingProperty, 1878 TypeSourceInfo *T, 1879 tok::ObjCKeywordKind MethodImplKind); 1880 1881 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1882 /// handle creating the ObjcPropertyDecl for a category or @interface. 1883 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1884 ObjCContainerDecl *CDecl, 1885 SourceLocation AtLoc, 1886 FieldDeclarator &FD, 1887 Selector GetterSel, 1888 Selector SetterSel, 1889 const bool isAssign, 1890 const bool isReadWrite, 1891 const unsigned Attributes, 1892 TypeSourceInfo *T, 1893 tok::ObjCKeywordKind MethodImplKind, 1894 DeclContext *lexicalDC = 0); 1895 1896 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1897 /// warning) when atomic property has one but not the other user-declared 1898 /// setter or getter. 1899 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1900 ObjCContainerDecl* IDecl); 1901 1902 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 1903 1904 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1905 1906 enum MethodMatchStrategy { 1907 MMS_loose, 1908 MMS_strict 1909 }; 1910 1911 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1912 /// true, or false, accordingly. 1913 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1914 const ObjCMethodDecl *PrevMethod, 1915 MethodMatchStrategy strategy = MMS_strict); 1916 1917 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1918 /// or protocol against those declared in their implementations. 1919 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1920 const SelectorSet &ClsMap, 1921 SelectorSet &InsMapSeen, 1922 SelectorSet &ClsMapSeen, 1923 ObjCImplDecl* IMPDecl, 1924 ObjCContainerDecl* IDecl, 1925 bool &IncompleteImpl, 1926 bool ImmediateClass, 1927 bool WarnExactMatch=false); 1928 1929 /// MatchIdenticalSelectorsInProtocols - Check that mathods with 1930 /// identical selectors in all protocols of this class type match. 1931 /// Issue warning if they don't. 1932 void MatchIdenticalSelectorsInProtocols(const ObjCInterfaceDecl *CDecl); 1933 1934 /// MatchMethodsInClassAndItsProtocol - Check that any redeclaration of 1935 /// method in protocol in its qualified class match in their type and 1936 /// issue warnings otherwise. 1937 void MatchMethodsInClassAndItsProtocol(const ObjCInterfaceDecl *CDecl); 1938 1939 1940 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in 1941 /// category matches with those implemented in its primary class and 1942 /// warns each time an exact match is found. 1943 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP); 1944 1945private: 1946 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1947 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1948 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1949 1950 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1951 /// optionally warns if there are multiple signatures. 1952 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1953 bool receiverIdOrClass, 1954 bool warn, bool instance); 1955 1956public: 1957 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1958 /// unit are added to a global pool. This allows us to efficiently associate 1959 /// a selector with a method declaraation for purposes of typechecking 1960 /// messages sent to "id" (where the class of the object is unknown). 1961 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1962 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1963 } 1964 1965 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1966 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1967 AddMethodToGlobalPool(Method, impl, /*instance*/false); 1968 } 1969 1970 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 1971 /// there are multiple signatures. 1972 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 1973 bool receiverIdOrClass=false, 1974 bool warn=true) { 1975 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1976 warn, /*instance*/true); 1977 } 1978 1979 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 1980 /// there are multiple signatures. 1981 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 1982 bool receiverIdOrClass=false, 1983 bool warn=true) { 1984 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1985 warn, /*instance*/false); 1986 } 1987 1988 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 1989 /// implementation. 1990 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 1991 1992 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 1993 /// initialization. 1994 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 1995 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 1996 1997 //===--------------------------------------------------------------------===// 1998 // Statement Parsing Callbacks: SemaStmt.cpp. 1999public: 2000 class FullExprArg { 2001 public: 2002 FullExprArg(Sema &actions) : E(0) { } 2003 2004 // FIXME: The const_cast here is ugly. RValue references would make this 2005 // much nicer (or we could duplicate a bunch of the move semantics 2006 // emulation code from Ownership.h). 2007 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 2008 2009 ExprResult release() { 2010 return move(E); 2011 } 2012 2013 Expr *get() const { return E; } 2014 2015 Expr *operator->() { 2016 return E; 2017 } 2018 2019 private: 2020 // FIXME: No need to make the entire Sema class a friend when it's just 2021 // Sema::MakeFullExpr that needs access to the constructor below. 2022 friend class Sema; 2023 2024 explicit FullExprArg(Expr *expr) : E(expr) {} 2025 2026 Expr *E; 2027 }; 2028 2029 FullExprArg MakeFullExpr(Expr *Arg) { 2030 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 2031 } 2032 2033 StmtResult ActOnExprStmt(FullExprArg Expr); 2034 2035 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 2036 SourceLocation LeadingEmptyMacroLoc = SourceLocation()); 2037 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 2038 MultiStmtArg Elts, 2039 bool isStmtExpr); 2040 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2041 SourceLocation StartLoc, 2042 SourceLocation EndLoc); 2043 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2044 StmtResult ActOnForEachLValueExpr(Expr *E); 2045 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2046 SourceLocation DotDotDotLoc, Expr *RHSVal, 2047 SourceLocation ColonLoc); 2048 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2049 2050 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2051 SourceLocation ColonLoc, 2052 Stmt *SubStmt, Scope *CurScope); 2053 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2054 SourceLocation ColonLoc, Stmt *SubStmt); 2055 2056 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2057 FullExprArg CondVal, Decl *CondVar, 2058 Stmt *ThenVal, 2059 SourceLocation ElseLoc, Stmt *ElseVal); 2060 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2061 Expr *Cond, 2062 Decl *CondVar); 2063 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2064 Stmt *Switch, Stmt *Body); 2065 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2066 FullExprArg Cond, 2067 Decl *CondVar, Stmt *Body); 2068 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2069 SourceLocation WhileLoc, 2070 SourceLocation CondLParen, Expr *Cond, 2071 SourceLocation CondRParen); 2072 2073 StmtResult ActOnForStmt(SourceLocation ForLoc, 2074 SourceLocation LParenLoc, 2075 Stmt *First, FullExprArg Second, 2076 Decl *SecondVar, 2077 FullExprArg Third, 2078 SourceLocation RParenLoc, 2079 Stmt *Body); 2080 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc, 2081 Expr *collection); 2082 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2083 SourceLocation LParenLoc, 2084 Stmt *First, Expr *Second, 2085 SourceLocation RParenLoc, Stmt *Body); 2086 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2087 SourceLocation LParenLoc, Stmt *LoopVar, 2088 SourceLocation ColonLoc, Expr *Collection, 2089 SourceLocation RParenLoc); 2090 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2091 SourceLocation ColonLoc, 2092 Stmt *RangeDecl, Stmt *BeginEndDecl, 2093 Expr *Cond, Expr *Inc, 2094 Stmt *LoopVarDecl, 2095 SourceLocation RParenLoc); 2096 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2097 2098 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2099 SourceLocation LabelLoc, 2100 LabelDecl *TheDecl); 2101 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2102 SourceLocation StarLoc, 2103 Expr *DestExp); 2104 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2105 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2106 2107 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2108 bool AllowFunctionParameters); 2109 2110 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2111 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2112 2113 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2114 bool IsSimple, bool IsVolatile, 2115 unsigned NumOutputs, unsigned NumInputs, 2116 IdentifierInfo **Names, 2117 MultiExprArg Constraints, 2118 MultiExprArg Exprs, 2119 Expr *AsmString, 2120 MultiExprArg Clobbers, 2121 SourceLocation RParenLoc, 2122 bool MSAsm = false); 2123 2124 2125 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2126 SourceLocation StartLoc, 2127 SourceLocation IdLoc, IdentifierInfo *Id, 2128 bool Invalid = false); 2129 2130 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2131 2132 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2133 Decl *Parm, Stmt *Body); 2134 2135 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2136 2137 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2138 MultiStmtArg Catch, Stmt *Finally); 2139 2140 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2141 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2142 Scope *CurScope); 2143 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, 2144 Expr *operand); 2145 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2146 Expr *SynchExpr, 2147 Stmt *SynchBody); 2148 2149 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2150 2151 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2152 SourceLocation StartLoc, 2153 SourceLocation IdLoc, 2154 IdentifierInfo *Id); 2155 2156 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2157 2158 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2159 Decl *ExDecl, Stmt *HandlerBlock); 2160 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2161 MultiStmtArg Handlers); 2162 2163 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2164 SourceLocation TryLoc, 2165 Stmt *TryBlock, 2166 Stmt *Handler); 2167 2168 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2169 Expr *FilterExpr, 2170 Stmt *Block); 2171 2172 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2173 Stmt *Block); 2174 2175 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2176 2177 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2178 2179 /// \brief If it's a file scoped decl that must warn if not used, keep track 2180 /// of it. 2181 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2182 2183 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2184 /// whose result is unused, warn. 2185 void DiagnoseUnusedExprResult(const Stmt *S); 2186 void DiagnoseUnusedDecl(const NamedDecl *ND); 2187 2188 ParsingDeclState PushParsingDeclaration() { 2189 return DelayedDiagnostics.pushParsingDecl(); 2190 } 2191 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2192 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2193 } 2194 2195 typedef ProcessingContextState ParsingClassState; 2196 ParsingClassState PushParsingClass() { 2197 return DelayedDiagnostics.pushContext(); 2198 } 2199 void PopParsingClass(ParsingClassState state) { 2200 DelayedDiagnostics.popContext(state); 2201 } 2202 2203 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2204 SourceLocation Loc, 2205 const ObjCInterfaceDecl *UnknownObjCClass=0); 2206 2207 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2208 2209 bool makeUnavailableInSystemHeader(SourceLocation loc, 2210 StringRef message); 2211 2212 //===--------------------------------------------------------------------===// 2213 // Expression Parsing Callbacks: SemaExpr.cpp. 2214 2215 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2216 const ObjCInterfaceDecl *UnknownObjCClass=0); 2217 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2218 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2219 ObjCMethodDecl *Getter, 2220 SourceLocation Loc); 2221 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2222 Expr **Args, unsigned NumArgs); 2223 2224 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 2225 2226 void PopExpressionEvaluationContext(); 2227 2228 void DiscardCleanupsInEvaluationContext(); 2229 2230 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 2231 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2232 void MarkDeclarationsReferencedInExpr(Expr *E); 2233 2234 /// \brief Figure out if an expression could be turned into a call. 2235 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2236 UnresolvedSetImpl &NonTemplateOverloads); 2237 /// \brief Give notes for a set of overloads. 2238 void NoteOverloads(const UnresolvedSetImpl &Overloads, 2239 const SourceLocation FinalNoteLoc); 2240 2241 /// \brief Conditionally issue a diagnostic based on the current 2242 /// evaluation context. 2243 /// 2244 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2245 /// the function body is parsed, and then do a basic reachability analysis to 2246 /// determine if the statement is reachable. If it is unreachable, the 2247 /// diagnostic will not be emitted. 2248 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *stmt, 2249 const PartialDiagnostic &PD); 2250 2251 // Primary Expressions. 2252 SourceRange getExprRange(Expr *E) const; 2253 2254 ObjCIvarDecl *SynthesizeProvisionalIvar(LookupResult &Lookup, 2255 IdentifierInfo *II, 2256 SourceLocation NameLoc); 2257 2258 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Name, 2259 bool HasTrailingLParen, bool IsAddressOfOperand); 2260 2261 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2262 TemplateArgumentListInfo &Buffer, 2263 DeclarationNameInfo &NameInfo, 2264 const TemplateArgumentListInfo *&TemplateArgs); 2265 2266 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2267 CorrectTypoContext CTC = CTC_Unknown, 2268 Expr **Args = 0, unsigned NumArgs = 0); 2269 2270 ExprResult LookupInObjCMethod(LookupResult &R, Scope *S, IdentifierInfo *II, 2271 bool AllowBuiltinCreation=false); 2272 2273 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2274 const DeclarationNameInfo &NameInfo, 2275 bool isAddressOfOperand, 2276 const TemplateArgumentListInfo *TemplateArgs); 2277 2278 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2279 ExprValueKind VK, 2280 SourceLocation Loc, 2281 const CXXScopeSpec *SS = 0); 2282 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2283 ExprValueKind VK, 2284 const DeclarationNameInfo &NameInfo, 2285 const CXXScopeSpec *SS = 0); 2286 ExprResult 2287 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2288 SourceLocation nameLoc, 2289 IndirectFieldDecl *indirectField, 2290 Expr *baseObjectExpr = 0, 2291 SourceLocation opLoc = SourceLocation()); 2292 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2293 LookupResult &R, 2294 const TemplateArgumentListInfo *TemplateArgs); 2295 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2296 LookupResult &R, 2297 const TemplateArgumentListInfo *TemplateArgs, 2298 bool IsDefiniteInstance); 2299 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2300 const LookupResult &R, 2301 bool HasTrailingLParen); 2302 2303 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2304 const DeclarationNameInfo &NameInfo); 2305 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2306 const DeclarationNameInfo &NameInfo, 2307 const TemplateArgumentListInfo *TemplateArgs); 2308 2309 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2310 LookupResult &R, 2311 bool ADL); 2312 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2313 const DeclarationNameInfo &NameInfo, 2314 NamedDecl *D); 2315 2316 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2317 ExprResult ActOnNumericConstant(const Token &); 2318 ExprResult ActOnCharacterConstant(const Token &); 2319 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *Val); 2320 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2321 SourceLocation R, 2322 MultiExprArg Val); 2323 2324 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2325 /// fragments (e.g. "foo" "bar" L"baz"). 2326 ExprResult ActOnStringLiteral(const Token *Toks, unsigned NumToks); 2327 2328 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2329 SourceLocation DefaultLoc, 2330 SourceLocation RParenLoc, 2331 Expr *ControllingExpr, 2332 MultiTypeArg Types, 2333 MultiExprArg Exprs); 2334 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2335 SourceLocation DefaultLoc, 2336 SourceLocation RParenLoc, 2337 Expr *ControllingExpr, 2338 TypeSourceInfo **Types, 2339 Expr **Exprs, 2340 unsigned NumAssocs); 2341 2342 // Binary/Unary Operators. 'Tok' is the token for the operator. 2343 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2344 Expr *InputArg); 2345 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2346 UnaryOperatorKind Opc, Expr *input); 2347 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2348 tok::TokenKind Op, Expr *Input); 2349 2350 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *T, 2351 SourceLocation OpLoc, 2352 UnaryExprOrTypeTrait ExprKind, 2353 SourceRange R); 2354 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2355 UnaryExprOrTypeTrait ExprKind); 2356 ExprResult 2357 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2358 UnaryExprOrTypeTrait ExprKind, 2359 bool isType, void *TyOrEx, 2360 const SourceRange &ArgRange); 2361 2362 ExprResult CheckPlaceholderExpr(Expr *E); 2363 bool CheckVecStepExpr(Expr *E); 2364 2365 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2366 bool CheckUnaryExprOrTypeTraitOperand(QualType type, SourceLocation OpLoc, 2367 SourceRange R, 2368 UnaryExprOrTypeTrait ExprKind); 2369 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2370 SourceLocation OpLoc, 2371 IdentifierInfo &Name, 2372 SourceLocation NameLoc, 2373 SourceLocation RParenLoc); 2374 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2375 tok::TokenKind Kind, Expr *Input); 2376 2377 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2378 Expr *Idx, SourceLocation RLoc); 2379 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2380 Expr *Idx, SourceLocation RLoc); 2381 2382 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2383 SourceLocation OpLoc, bool IsArrow, 2384 CXXScopeSpec &SS, 2385 NamedDecl *FirstQualifierInScope, 2386 const DeclarationNameInfo &NameInfo, 2387 const TemplateArgumentListInfo *TemplateArgs); 2388 2389 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2390 SourceLocation OpLoc, bool IsArrow, 2391 const CXXScopeSpec &SS, 2392 NamedDecl *FirstQualifierInScope, 2393 LookupResult &R, 2394 const TemplateArgumentListInfo *TemplateArgs, 2395 bool SuppressQualifierCheck = false); 2396 2397 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2398 bool &IsArrow, SourceLocation OpLoc, 2399 CXXScopeSpec &SS, 2400 Decl *ObjCImpDecl, 2401 bool HasTemplateArgs); 2402 2403 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2404 const CXXScopeSpec &SS, 2405 const LookupResult &R); 2406 2407 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2408 bool IsArrow, SourceLocation OpLoc, 2409 const CXXScopeSpec &SS, 2410 NamedDecl *FirstQualifierInScope, 2411 const DeclarationNameInfo &NameInfo, 2412 const TemplateArgumentListInfo *TemplateArgs); 2413 2414 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2415 SourceLocation OpLoc, 2416 tok::TokenKind OpKind, 2417 CXXScopeSpec &SS, 2418 UnqualifiedId &Member, 2419 Decl *ObjCImpDecl, 2420 bool HasTrailingLParen); 2421 2422 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2423 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2424 FunctionDecl *FDecl, 2425 const FunctionProtoType *Proto, 2426 Expr **Args, unsigned NumArgs, 2427 SourceLocation RParenLoc); 2428 2429 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2430 /// This provides the location of the left/right parens and a list of comma 2431 /// locations. 2432 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2433 MultiExprArg Args, SourceLocation RParenLoc, 2434 Expr *ExecConfig = 0); 2435 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2436 SourceLocation LParenLoc, 2437 Expr **Args, unsigned NumArgs, 2438 SourceLocation RParenLoc, 2439 Expr *ExecConfig = 0); 2440 2441 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2442 MultiExprArg ExecConfig, SourceLocation GGGLoc); 2443 2444 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2445 Declarator &D, ParsedType &Ty, 2446 SourceLocation RParenLoc, Expr *Op); 2447 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2448 TypeSourceInfo *Ty, 2449 SourceLocation RParenLoc, 2450 Expr *Op); 2451 2452 /// \brief Build an altivec or OpenCL literal. 2453 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2454 SourceLocation RParenLoc, Expr *E, 2455 TypeSourceInfo *TInfo); 2456 2457 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2458 2459 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2460 ParsedType Ty, 2461 SourceLocation RParenLoc, 2462 Expr *Op); 2463 2464 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2465 TypeSourceInfo *TInfo, 2466 SourceLocation RParenLoc, 2467 Expr *InitExpr); 2468 2469 ExprResult ActOnInitList(SourceLocation LParenLoc, 2470 MultiExprArg InitList, 2471 SourceLocation RParenLoc); 2472 2473 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2474 SourceLocation Loc, 2475 bool GNUSyntax, 2476 ExprResult Init); 2477 2478 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2479 tok::TokenKind Kind, Expr *LHS, Expr *RHS); 2480 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2481 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2482 ExprResult CreateBuiltinBinOp(SourceLocation TokLoc, 2483 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2484 2485 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2486 /// in the case of a the GNU conditional expr extension. 2487 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2488 SourceLocation ColonLoc, 2489 Expr *Cond, Expr *LHS, Expr *RHS); 2490 2491 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2492 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2493 LabelDecl *LD); 2494 2495 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2496 SourceLocation RPLoc); // "({..})" 2497 2498 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2499 struct OffsetOfComponent { 2500 SourceLocation LocStart, LocEnd; 2501 bool isBrackets; // true if [expr], false if .ident 2502 union { 2503 IdentifierInfo *IdentInfo; 2504 ExprTy *E; 2505 } U; 2506 }; 2507 2508 /// __builtin_offsetof(type, a.b[123][456].c) 2509 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2510 TypeSourceInfo *TInfo, 2511 OffsetOfComponent *CompPtr, 2512 unsigned NumComponents, 2513 SourceLocation RParenLoc); 2514 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2515 SourceLocation BuiltinLoc, 2516 SourceLocation TypeLoc, 2517 ParsedType Arg1, 2518 OffsetOfComponent *CompPtr, 2519 unsigned NumComponents, 2520 SourceLocation RParenLoc); 2521 2522 // __builtin_choose_expr(constExpr, expr1, expr2) 2523 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2524 Expr *cond, Expr *expr1, 2525 Expr *expr2, SourceLocation RPLoc); 2526 2527 // __builtin_va_arg(expr, type) 2528 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, 2529 Expr *expr, ParsedType type, 2530 SourceLocation RPLoc); 2531 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, 2532 Expr *expr, TypeSourceInfo *TInfo, 2533 SourceLocation RPLoc); 2534 2535 // __null 2536 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2537 2538 bool CheckCaseExpression(Expr *expr); 2539 2540 bool CheckMicrosoftIfExistsSymbol(CXXScopeSpec &SS, UnqualifiedId &Name); 2541 2542 //===------------------------- "Block" Extension ------------------------===// 2543 2544 /// ActOnBlockStart - This callback is invoked when a block literal is 2545 /// started. 2546 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2547 2548 /// ActOnBlockArguments - This callback allows processing of block arguments. 2549 /// If there are no arguments, this is still invoked. 2550 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2551 2552 /// ActOnBlockError - If there is an error parsing a block, this callback 2553 /// is invoked to pop the information about the block from the action impl. 2554 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2555 2556 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2557 /// literal was successfully completed. ^(int x){...} 2558 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, 2559 Stmt *Body, Scope *CurScope); 2560 2561 //===---------------------------- OpenCL Features -----------------------===// 2562 2563 /// __builtin_astype(...) 2564 ExprResult ActOnAsTypeExpr(Expr *expr, ParsedType DestTy, 2565 SourceLocation BuiltinLoc, 2566 SourceLocation RParenLoc); 2567 2568 //===---------------------------- C++ Features --------------------------===// 2569 2570 // Act on C++ namespaces 2571 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2572 SourceLocation NamespaceLoc, 2573 SourceLocation IdentLoc, 2574 IdentifierInfo *Ident, 2575 SourceLocation LBrace, 2576 AttributeList *AttrList); 2577 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2578 2579 NamespaceDecl *getStdNamespace() const; 2580 NamespaceDecl *getOrCreateStdNamespace(); 2581 2582 CXXRecordDecl *getStdBadAlloc() const; 2583 2584 Decl *ActOnUsingDirective(Scope *CurScope, 2585 SourceLocation UsingLoc, 2586 SourceLocation NamespcLoc, 2587 CXXScopeSpec &SS, 2588 SourceLocation IdentLoc, 2589 IdentifierInfo *NamespcName, 2590 AttributeList *AttrList); 2591 2592 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2593 2594 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2595 SourceLocation NamespaceLoc, 2596 SourceLocation AliasLoc, 2597 IdentifierInfo *Alias, 2598 CXXScopeSpec &SS, 2599 SourceLocation IdentLoc, 2600 IdentifierInfo *Ident); 2601 2602 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2603 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2604 const LookupResult &PreviousDecls); 2605 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2606 NamedDecl *Target); 2607 2608 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2609 bool isTypeName, 2610 const CXXScopeSpec &SS, 2611 SourceLocation NameLoc, 2612 const LookupResult &Previous); 2613 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2614 const CXXScopeSpec &SS, 2615 SourceLocation NameLoc); 2616 2617 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2618 SourceLocation UsingLoc, 2619 CXXScopeSpec &SS, 2620 const DeclarationNameInfo &NameInfo, 2621 AttributeList *AttrList, 2622 bool IsInstantiation, 2623 bool IsTypeName, 2624 SourceLocation TypenameLoc); 2625 2626 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2627 2628 Decl *ActOnUsingDeclaration(Scope *CurScope, 2629 AccessSpecifier AS, 2630 bool HasUsingKeyword, 2631 SourceLocation UsingLoc, 2632 CXXScopeSpec &SS, 2633 UnqualifiedId &Name, 2634 AttributeList *AttrList, 2635 bool IsTypeName, 2636 SourceLocation TypenameLoc); 2637 Decl *ActOnAliasDeclaration(Scope *CurScope, 2638 AccessSpecifier AS, 2639 MultiTemplateParamsArg TemplateParams, 2640 SourceLocation UsingLoc, 2641 UnqualifiedId &Name, 2642 TypeResult Type); 2643 2644 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2645 /// ActOnDeclarator, when a C++ direct initializer is present. 2646 /// e.g: "int x(1);" 2647 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2648 SourceLocation LParenLoc, 2649 MultiExprArg Exprs, 2650 SourceLocation RParenLoc, 2651 bool TypeMayContainAuto); 2652 2653 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2654 /// and sets it as the initializer for the the passed in VarDecl. 2655 bool InitializeVarWithConstructor(VarDecl *VD, 2656 CXXConstructorDecl *Constructor, 2657 MultiExprArg Exprs); 2658 2659 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2660 /// including handling of its default argument expressions. 2661 /// 2662 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2663 ExprResult 2664 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2665 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2666 bool RequiresZeroInit, unsigned ConstructKind, 2667 SourceRange ParenRange); 2668 2669 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2670 // the constructor can be elidable? 2671 ExprResult 2672 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2673 CXXConstructorDecl *Constructor, bool Elidable, 2674 MultiExprArg Exprs, bool RequiresZeroInit, 2675 unsigned ConstructKind, 2676 SourceRange ParenRange); 2677 2678 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2679 /// the default expr if needed. 2680 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2681 FunctionDecl *FD, 2682 ParmVarDecl *Param); 2683 2684 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2685 /// constructed variable. 2686 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2687 2688 /// \brief Helper class that collects exception specifications for 2689 /// implicitly-declared special member functions. 2690 class ImplicitExceptionSpecification { 2691 // Pointer to allow copying 2692 ASTContext *Context; 2693 // We order exception specifications thus: 2694 // noexcept is the most restrictive, but is only used in C++0x. 2695 // throw() comes next. 2696 // Then a throw(collected exceptions) 2697 // Finally no specification. 2698 // throw(...) is used instead if any called function uses it. 2699 // 2700 // If this exception specification cannot be known yet (for instance, 2701 // because this is the exception specification for a defaulted default 2702 // constructor and we haven't finished parsing the deferred parts of the 2703 // class yet), the C++0x standard does not specify how to behave. We 2704 // record this as an 'unknown' exception specification, which overrules 2705 // any other specification (even 'none', to keep this rule simple). 2706 ExceptionSpecificationType ComputedEST; 2707 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2708 SmallVector<QualType, 4> Exceptions; 2709 2710 void ClearExceptions() { 2711 ExceptionsSeen.clear(); 2712 Exceptions.clear(); 2713 } 2714 2715 public: 2716 explicit ImplicitExceptionSpecification(ASTContext &Context) 2717 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2718 if (!Context.getLangOptions().CPlusPlus0x) 2719 ComputedEST = EST_DynamicNone; 2720 } 2721 2722 /// \brief Get the computed exception specification type. 2723 ExceptionSpecificationType getExceptionSpecType() const { 2724 assert(ComputedEST != EST_ComputedNoexcept && 2725 "noexcept(expr) should not be a possible result"); 2726 return ComputedEST; 2727 } 2728 2729 /// \brief The number of exceptions in the exception specification. 2730 unsigned size() const { return Exceptions.size(); } 2731 2732 /// \brief The set of exceptions in the exception specification. 2733 const QualType *data() const { return Exceptions.data(); } 2734 2735 /// \brief Integrate another called method into the collected data. 2736 void CalledDecl(CXXMethodDecl *Method); 2737 2738 /// \brief Integrate an invoked expression into the collected data. 2739 void CalledExpr(Expr *E); 2740 2741 /// \brief Specify that the exception specification can't be detemined yet. 2742 void SetDelayed() { 2743 ClearExceptions(); 2744 ComputedEST = EST_Delayed; 2745 } 2746 2747 FunctionProtoType::ExtProtoInfo getEPI() const { 2748 FunctionProtoType::ExtProtoInfo EPI; 2749 EPI.ExceptionSpecType = getExceptionSpecType(); 2750 EPI.NumExceptions = size(); 2751 EPI.Exceptions = data(); 2752 return EPI; 2753 } 2754 }; 2755 2756 /// \brief Determine what sort of exception specification a defaulted 2757 /// copy constructor of a class will have. 2758 ImplicitExceptionSpecification 2759 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2760 2761 /// \brief Determine what sort of exception specification a defaulted 2762 /// default constructor of a class will have, and whether the parameter 2763 /// will be const. 2764 std::pair<ImplicitExceptionSpecification, bool> 2765 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2766 2767 /// \brief Determine what sort of exception specification a defautled 2768 /// copy assignment operator of a class will have, and whether the 2769 /// parameter will be const. 2770 std::pair<ImplicitExceptionSpecification, bool> 2771 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2772 2773 /// \brief Determine what sort of exception specification a defaulted 2774 /// destructor of a class will have. 2775 ImplicitExceptionSpecification 2776 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 2777 2778 /// \brief Determine if a defaulted default constructor ought to be 2779 /// deleted. 2780 bool ShouldDeleteDefaultConstructor(CXXConstructorDecl *CD); 2781 2782 /// \brief Determine if a defaulted copy constructor ought to be 2783 /// deleted. 2784 bool ShouldDeleteCopyConstructor(CXXConstructorDecl *CD); 2785 2786 /// \brief Determine if a defaulted copy assignment operator ought to be 2787 /// deleted. 2788 bool ShouldDeleteCopyAssignmentOperator(CXXMethodDecl *MD); 2789 2790 /// \brief Determine if a defaulted destructor ought to be deleted. 2791 bool ShouldDeleteDestructor(CXXDestructorDecl *DD); 2792 2793 /// \brief Declare the implicit default constructor for the given class. 2794 /// 2795 /// \param ClassDecl The class declaration into which the implicit 2796 /// default constructor will be added. 2797 /// 2798 /// \returns The implicitly-declared default constructor. 2799 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2800 CXXRecordDecl *ClassDecl); 2801 2802 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2803 /// defining this constructor as the default constructor. 2804 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2805 CXXConstructorDecl *Constructor); 2806 2807 /// \brief Declare the implicit destructor for the given class. 2808 /// 2809 /// \param ClassDecl The class declaration into which the implicit 2810 /// destructor will be added. 2811 /// 2812 /// \returns The implicitly-declared destructor. 2813 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2814 2815 /// DefineImplicitDestructor - Checks for feasibility of 2816 /// defining this destructor as the default destructor. 2817 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2818 CXXDestructorDecl *Destructor); 2819 2820 /// \brief Build an exception spec for destructors that don't have one. 2821 /// 2822 /// C++11 says that user-defined destructors with no exception spec get one 2823 /// that looks as if the destructor was implicitly declared. 2824 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 2825 CXXDestructorDecl *Destructor); 2826 2827 /// \brief Declare all inherited constructors for the given class. 2828 /// 2829 /// \param ClassDecl The class declaration into which the inherited 2830 /// constructors will be added. 2831 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2832 2833 /// \brief Declare the implicit copy constructor for the given class. 2834 /// 2835 /// \param S The scope of the class, which may be NULL if this is a 2836 /// template instantiation. 2837 /// 2838 /// \param ClassDecl The class declaration into which the implicit 2839 /// copy constructor will be added. 2840 /// 2841 /// \returns The implicitly-declared copy constructor. 2842 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2843 2844 /// DefineImplicitCopyConstructor - Checks for feasibility of 2845 /// defining this constructor as the copy constructor. 2846 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2847 CXXConstructorDecl *Constructor); 2848 2849 /// \brief Declare the implicit copy assignment operator for the given class. 2850 /// 2851 /// \param S The scope of the class, which may be NULL if this is a 2852 /// template instantiation. 2853 /// 2854 /// \param ClassDecl The class declaration into which the implicit 2855 /// copy-assignment operator will be added. 2856 /// 2857 /// \returns The implicitly-declared copy assignment operator. 2858 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2859 2860 /// \brief Defined an implicitly-declared copy assignment operator. 2861 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2862 CXXMethodDecl *MethodDecl); 2863 2864 /// \brief Force the declaration of any implicitly-declared members of this 2865 /// class. 2866 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2867 2868 /// MaybeBindToTemporary - If the passed in expression has a record type with 2869 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 2870 /// it simply returns the passed in expression. 2871 ExprResult MaybeBindToTemporary(Expr *E); 2872 2873 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 2874 MultiExprArg ArgsPtr, 2875 SourceLocation Loc, 2876 ASTOwningVector<Expr*> &ConvertedArgs); 2877 2878 ParsedType getDestructorName(SourceLocation TildeLoc, 2879 IdentifierInfo &II, SourceLocation NameLoc, 2880 Scope *S, CXXScopeSpec &SS, 2881 ParsedType ObjectType, 2882 bool EnteringContext); 2883 2884 // Checks that reinterpret casts don't have undefined behavior. 2885 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 2886 bool IsDereference, SourceRange Range); 2887 2888 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 2889 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 2890 tok::TokenKind Kind, 2891 SourceLocation LAngleBracketLoc, 2892 Declarator &D, 2893 SourceLocation RAngleBracketLoc, 2894 SourceLocation LParenLoc, 2895 Expr *E, 2896 SourceLocation RParenLoc); 2897 2898 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 2899 tok::TokenKind Kind, 2900 TypeSourceInfo *Ty, 2901 Expr *E, 2902 SourceRange AngleBrackets, 2903 SourceRange Parens); 2904 2905 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2906 SourceLocation TypeidLoc, 2907 TypeSourceInfo *Operand, 2908 SourceLocation RParenLoc); 2909 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2910 SourceLocation TypeidLoc, 2911 Expr *Operand, 2912 SourceLocation RParenLoc); 2913 2914 /// ActOnCXXTypeid - Parse typeid( something ). 2915 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 2916 SourceLocation LParenLoc, bool isType, 2917 void *TyOrExpr, 2918 SourceLocation RParenLoc); 2919 2920 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2921 SourceLocation TypeidLoc, 2922 TypeSourceInfo *Operand, 2923 SourceLocation RParenLoc); 2924 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2925 SourceLocation TypeidLoc, 2926 Expr *Operand, 2927 SourceLocation RParenLoc); 2928 2929 /// ActOnCXXUuidof - Parse __uuidof( something ). 2930 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 2931 SourceLocation LParenLoc, bool isType, 2932 void *TyOrExpr, 2933 SourceLocation RParenLoc); 2934 2935 2936 //// ActOnCXXThis - Parse 'this' pointer. 2937 ExprResult ActOnCXXThis(SourceLocation loc); 2938 2939 /// getAndCaptureCurrentThisType - Try to capture a 'this' pointer. Returns 2940 /// the type of the 'this' pointer, or a null type if this is not possible. 2941 QualType getAndCaptureCurrentThisType(); 2942 2943 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 2944 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 2945 2946 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 2947 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 2948 2949 //// ActOnCXXThrow - Parse throw expressions. 2950 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 2951 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 2952 bool IsThrownVarInScope); 2953 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 2954 bool IsThrownVarInScope); 2955 2956 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 2957 /// Can be interpreted either as function-style casting ("int(x)") 2958 /// or class type construction ("ClassType(x,y,z)") 2959 /// or creation of a value-initialized type ("int()"). 2960 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 2961 SourceLocation LParenLoc, 2962 MultiExprArg Exprs, 2963 SourceLocation RParenLoc); 2964 2965 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 2966 SourceLocation LParenLoc, 2967 MultiExprArg Exprs, 2968 SourceLocation RParenLoc); 2969 2970 /// ActOnCXXNew - Parsed a C++ 'new' expression. 2971 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 2972 SourceLocation PlacementLParen, 2973 MultiExprArg PlacementArgs, 2974 SourceLocation PlacementRParen, 2975 SourceRange TypeIdParens, Declarator &D, 2976 SourceLocation ConstructorLParen, 2977 MultiExprArg ConstructorArgs, 2978 SourceLocation ConstructorRParen); 2979 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 2980 SourceLocation PlacementLParen, 2981 MultiExprArg PlacementArgs, 2982 SourceLocation PlacementRParen, 2983 SourceRange TypeIdParens, 2984 QualType AllocType, 2985 TypeSourceInfo *AllocTypeInfo, 2986 Expr *ArraySize, 2987 SourceLocation ConstructorLParen, 2988 MultiExprArg ConstructorArgs, 2989 SourceLocation ConstructorRParen, 2990 bool TypeMayContainAuto = true); 2991 2992 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 2993 SourceRange R); 2994 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 2995 bool UseGlobal, QualType AllocType, bool IsArray, 2996 Expr **PlaceArgs, unsigned NumPlaceArgs, 2997 FunctionDecl *&OperatorNew, 2998 FunctionDecl *&OperatorDelete); 2999 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 3000 DeclarationName Name, Expr** Args, 3001 unsigned NumArgs, DeclContext *Ctx, 3002 bool AllowMissing, FunctionDecl *&Operator, 3003 bool Diagnose = true); 3004 void DeclareGlobalNewDelete(); 3005 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 3006 QualType Argument, 3007 bool addMallocAttr = false); 3008 3009 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 3010 DeclarationName Name, FunctionDecl* &Operator, 3011 bool Diagnose = true); 3012 3013 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 3014 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 3015 bool UseGlobal, bool ArrayForm, 3016 Expr *Operand); 3017 3018 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 3019 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 3020 SourceLocation StmtLoc, 3021 bool ConvertToBoolean); 3022 3023 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 3024 Expr *Operand, SourceLocation RParen); 3025 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 3026 SourceLocation RParen); 3027 3028 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 3029 /// pseudo-functions. 3030 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 3031 SourceLocation KWLoc, 3032 ParsedType Ty, 3033 SourceLocation RParen); 3034 3035 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3036 SourceLocation KWLoc, 3037 TypeSourceInfo *T, 3038 SourceLocation RParen); 3039 3040 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3041 /// pseudo-functions. 3042 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3043 SourceLocation KWLoc, 3044 ParsedType LhsTy, 3045 ParsedType RhsTy, 3046 SourceLocation RParen); 3047 3048 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3049 SourceLocation KWLoc, 3050 TypeSourceInfo *LhsT, 3051 TypeSourceInfo *RhsT, 3052 SourceLocation RParen); 3053 3054 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3055 /// pseudo-functions. 3056 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3057 SourceLocation KWLoc, 3058 ParsedType LhsTy, 3059 Expr *DimExpr, 3060 SourceLocation RParen); 3061 3062 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3063 SourceLocation KWLoc, 3064 TypeSourceInfo *TSInfo, 3065 Expr *DimExpr, 3066 SourceLocation RParen); 3067 3068 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3069 /// pseudo-functions. 3070 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3071 SourceLocation KWLoc, 3072 Expr *Queried, 3073 SourceLocation RParen); 3074 3075 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3076 SourceLocation KWLoc, 3077 Expr *Queried, 3078 SourceLocation RParen); 3079 3080 ExprResult ActOnStartCXXMemberReference(Scope *S, 3081 Expr *Base, 3082 SourceLocation OpLoc, 3083 tok::TokenKind OpKind, 3084 ParsedType &ObjectType, 3085 bool &MayBePseudoDestructor); 3086 3087 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3088 3089 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3090 SourceLocation OpLoc, 3091 tok::TokenKind OpKind, 3092 const CXXScopeSpec &SS, 3093 TypeSourceInfo *ScopeType, 3094 SourceLocation CCLoc, 3095 SourceLocation TildeLoc, 3096 PseudoDestructorTypeStorage DestroyedType, 3097 bool HasTrailingLParen); 3098 3099 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3100 SourceLocation OpLoc, 3101 tok::TokenKind OpKind, 3102 CXXScopeSpec &SS, 3103 UnqualifiedId &FirstTypeName, 3104 SourceLocation CCLoc, 3105 SourceLocation TildeLoc, 3106 UnqualifiedId &SecondTypeName, 3107 bool HasTrailingLParen); 3108 3109 /// MaybeCreateExprWithCleanups - If the current full-expression 3110 /// requires any cleanups, surround it with a ExprWithCleanups node. 3111 /// Otherwise, just returns the passed-in expression. 3112 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3113 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3114 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3115 3116 ExprResult ActOnFinishFullExpr(Expr *Expr); 3117 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3118 3119 // Marks SS invalid if it represents an incomplete type. 3120 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3121 3122 DeclContext *computeDeclContext(QualType T); 3123 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3124 bool EnteringContext = false); 3125 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3126 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3127 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3128 3129 /// \brief The parser has parsed a global nested-name-specifier '::'. 3130 /// 3131 /// \param S The scope in which this nested-name-specifier occurs. 3132 /// 3133 /// \param CCLoc The location of the '::'. 3134 /// 3135 /// \param SS The nested-name-specifier, which will be updated in-place 3136 /// to reflect the parsed nested-name-specifier. 3137 /// 3138 /// \returns true if an error occurred, false otherwise. 3139 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3140 CXXScopeSpec &SS); 3141 3142 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3143 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3144 3145 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3146 SourceLocation IdLoc, 3147 IdentifierInfo &II, 3148 ParsedType ObjectType); 3149 3150 bool BuildCXXNestedNameSpecifier(Scope *S, 3151 IdentifierInfo &Identifier, 3152 SourceLocation IdentifierLoc, 3153 SourceLocation CCLoc, 3154 QualType ObjectType, 3155 bool EnteringContext, 3156 CXXScopeSpec &SS, 3157 NamedDecl *ScopeLookupResult, 3158 bool ErrorRecoveryLookup); 3159 3160 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3161 /// 3162 /// \param S The scope in which this nested-name-specifier occurs. 3163 /// 3164 /// \param Identifier The identifier preceding the '::'. 3165 /// 3166 /// \param IdentifierLoc The location of the identifier. 3167 /// 3168 /// \param CCLoc The location of the '::'. 3169 /// 3170 /// \param ObjectType The type of the object, if we're parsing 3171 /// nested-name-specifier in a member access expression. 3172 /// 3173 /// \param EnteringContext Whether we're entering the context nominated by 3174 /// this nested-name-specifier. 3175 /// 3176 /// \param SS The nested-name-specifier, which is both an input 3177 /// parameter (the nested-name-specifier before this type) and an 3178 /// output parameter (containing the full nested-name-specifier, 3179 /// including this new type). 3180 /// 3181 /// \returns true if an error occurred, false otherwise. 3182 bool ActOnCXXNestedNameSpecifier(Scope *S, 3183 IdentifierInfo &Identifier, 3184 SourceLocation IdentifierLoc, 3185 SourceLocation CCLoc, 3186 ParsedType ObjectType, 3187 bool EnteringContext, 3188 CXXScopeSpec &SS); 3189 3190 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3191 IdentifierInfo &Identifier, 3192 SourceLocation IdentifierLoc, 3193 SourceLocation ColonLoc, 3194 ParsedType ObjectType, 3195 bool EnteringContext); 3196 3197 /// \brief The parser has parsed a nested-name-specifier 3198 /// 'template[opt] template-name < template-args >::'. 3199 /// 3200 /// \param S The scope in which this nested-name-specifier occurs. 3201 /// 3202 /// \param TemplateLoc The location of the 'template' keyword, if any. 3203 /// 3204 /// \param SS The nested-name-specifier, which is both an input 3205 /// parameter (the nested-name-specifier before this type) and an 3206 /// output parameter (containing the full nested-name-specifier, 3207 /// including this new type). 3208 /// 3209 /// \param TemplateLoc the location of the 'template' keyword, if any. 3210 /// \param TemplateName The template name. 3211 /// \param TemplateNameLoc The location of the template name. 3212 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3213 /// \param TemplateArgs The template arguments. 3214 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3215 /// \param CCLoc The location of the '::'. 3216 3217 /// \param EnteringContext Whether we're entering the context of the 3218 /// nested-name-specifier. 3219 /// 3220 /// 3221 /// \returns true if an error occurred, false otherwise. 3222 bool ActOnCXXNestedNameSpecifier(Scope *S, 3223 SourceLocation TemplateLoc, 3224 CXXScopeSpec &SS, 3225 TemplateTy Template, 3226 SourceLocation TemplateNameLoc, 3227 SourceLocation LAngleLoc, 3228 ASTTemplateArgsPtr TemplateArgs, 3229 SourceLocation RAngleLoc, 3230 SourceLocation CCLoc, 3231 bool EnteringContext); 3232 3233 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3234 /// that the parser can use later to reconstruct the given 3235 /// nested-name-specifier. 3236 /// 3237 /// \param SS A nested-name-specifier. 3238 /// 3239 /// \returns A pointer containing all of the information in the 3240 /// nested-name-specifier \p SS. 3241 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3242 3243 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3244 /// the nested-name-specifier structure. 3245 /// 3246 /// \param Annotation The annotation pointer, produced by 3247 /// \c SaveNestedNameSpecifierAnnotation(). 3248 /// 3249 /// \param AnnotationRange The source range corresponding to the annotation. 3250 /// 3251 /// \param SS The nested-name-specifier that will be updated with the contents 3252 /// of the annotation pointer. 3253 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3254 SourceRange AnnotationRange, 3255 CXXScopeSpec &SS); 3256 3257 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3258 3259 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3260 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3261 /// After this method is called, according to [C++ 3.4.3p3], names should be 3262 /// looked up in the declarator-id's scope, until the declarator is parsed and 3263 /// ActOnCXXExitDeclaratorScope is called. 3264 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3265 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3266 3267 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3268 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3269 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3270 /// Used to indicate that names should revert to being looked up in the 3271 /// defining scope. 3272 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3273 3274 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3275 /// initializer for the declaration 'Dcl'. 3276 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3277 /// static data member of class X, names should be looked up in the scope of 3278 /// class X. 3279 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3280 3281 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3282 /// initializer for the declaration 'Dcl'. 3283 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3284 3285 // ParseObjCStringLiteral - Parse Objective-C string literals. 3286 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3287 Expr **Strings, 3288 unsigned NumStrings); 3289 3290 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3291 TypeSourceInfo *EncodedTypeInfo, 3292 SourceLocation RParenLoc); 3293 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3294 CXXMethodDecl *Method); 3295 3296 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3297 SourceLocation EncodeLoc, 3298 SourceLocation LParenLoc, 3299 ParsedType Ty, 3300 SourceLocation RParenLoc); 3301 3302 // ParseObjCSelectorExpression - Build selector expression for @selector 3303 ExprResult ParseObjCSelectorExpression(Selector Sel, 3304 SourceLocation AtLoc, 3305 SourceLocation SelLoc, 3306 SourceLocation LParenLoc, 3307 SourceLocation RParenLoc); 3308 3309 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3310 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3311 SourceLocation AtLoc, 3312 SourceLocation ProtoLoc, 3313 SourceLocation LParenLoc, 3314 SourceLocation RParenLoc); 3315 3316 //===--------------------------------------------------------------------===// 3317 // C++ Declarations 3318 // 3319 Decl *ActOnStartLinkageSpecification(Scope *S, 3320 SourceLocation ExternLoc, 3321 SourceLocation LangLoc, 3322 StringRef Lang, 3323 SourceLocation LBraceLoc); 3324 Decl *ActOnFinishLinkageSpecification(Scope *S, 3325 Decl *LinkageSpec, 3326 SourceLocation RBraceLoc); 3327 3328 3329 //===--------------------------------------------------------------------===// 3330 // C++ Classes 3331 // 3332 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3333 const CXXScopeSpec *SS = 0); 3334 3335 Decl *ActOnAccessSpecifier(AccessSpecifier Access, 3336 SourceLocation ASLoc, 3337 SourceLocation ColonLoc); 3338 3339 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3340 Declarator &D, 3341 MultiTemplateParamsArg TemplateParameterLists, 3342 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3343 Expr *Init, bool HasDeferredInit, 3344 bool IsDefinition); 3345 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3346 Expr *Init); 3347 3348 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3349 Scope *S, 3350 CXXScopeSpec &SS, 3351 IdentifierInfo *MemberOrBase, 3352 ParsedType TemplateTypeTy, 3353 SourceLocation IdLoc, 3354 SourceLocation LParenLoc, 3355 Expr **Args, unsigned NumArgs, 3356 SourceLocation RParenLoc, 3357 SourceLocation EllipsisLoc); 3358 3359 MemInitResult BuildMemberInitializer(ValueDecl *Member, Expr **Args, 3360 unsigned NumArgs, SourceLocation IdLoc, 3361 SourceLocation LParenLoc, 3362 SourceLocation RParenLoc); 3363 3364 MemInitResult BuildBaseInitializer(QualType BaseType, 3365 TypeSourceInfo *BaseTInfo, 3366 Expr **Args, unsigned NumArgs, 3367 SourceLocation LParenLoc, 3368 SourceLocation RParenLoc, 3369 CXXRecordDecl *ClassDecl, 3370 SourceLocation EllipsisLoc); 3371 3372 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3373 Expr **Args, unsigned NumArgs, 3374 SourceLocation BaseLoc, 3375 SourceLocation RParenLoc, 3376 SourceLocation LParenLoc, 3377 CXXRecordDecl *ClassDecl); 3378 3379 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3380 CXXCtorInitializer *Initializer); 3381 3382 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3383 CXXCtorInitializer **Initializers, 3384 unsigned NumInitializers, bool AnyErrors); 3385 3386 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3387 3388 3389 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3390 /// mark all the non-trivial destructors of its members and bases as 3391 /// referenced. 3392 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3393 CXXRecordDecl *Record); 3394 3395 /// \brief The list of classes whose vtables have been used within 3396 /// this translation unit, and the source locations at which the 3397 /// first use occurred. 3398 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3399 3400 /// \brief The list of vtables that are required but have not yet been 3401 /// materialized. 3402 SmallVector<VTableUse, 16> VTableUses; 3403 3404 /// \brief The set of classes whose vtables have been used within 3405 /// this translation unit, and a bit that will be true if the vtable is 3406 /// required to be emitted (otherwise, it should be emitted only if needed 3407 /// by code generation). 3408 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3409 3410 /// \brief Load any externally-stored vtable uses. 3411 void LoadExternalVTableUses(); 3412 3413 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 3414 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 3415 DynamicClassesType; 3416 3417 /// \brief A list of all of the dynamic classes in this translation 3418 /// unit. 3419 DynamicClassesType DynamicClasses; 3420 3421 /// \brief Note that the vtable for the given class was used at the 3422 /// given location. 3423 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3424 bool DefinitionRequired = false); 3425 3426 /// MarkVirtualMembersReferenced - Will mark all members of the given 3427 /// CXXRecordDecl referenced. 3428 void MarkVirtualMembersReferenced(SourceLocation Loc, 3429 const CXXRecordDecl *RD); 3430 3431 /// \brief Define all of the vtables that have been used in this 3432 /// translation unit and reference any virtual members used by those 3433 /// vtables. 3434 /// 3435 /// \returns true if any work was done, false otherwise. 3436 bool DefineUsedVTables(); 3437 3438 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3439 3440 void ActOnMemInitializers(Decl *ConstructorDecl, 3441 SourceLocation ColonLoc, 3442 MemInitTy **MemInits, unsigned NumMemInits, 3443 bool AnyErrors); 3444 3445 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3446 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3447 Decl *TagDecl, 3448 SourceLocation LBrac, 3449 SourceLocation RBrac, 3450 AttributeList *AttrList); 3451 3452 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3453 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3454 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3455 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3456 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3457 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3458 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3459 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3460 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3461 bool IsInsideALocalClassWithinATemplateFunction(); 3462 3463 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3464 Expr *AssertExpr, 3465 Expr *AssertMessageExpr, 3466 SourceLocation RParenLoc); 3467 3468 FriendDecl *CheckFriendTypeDecl(SourceLocation FriendLoc, 3469 TypeSourceInfo *TSInfo); 3470 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3471 MultiTemplateParamsArg TemplateParams); 3472 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, bool IsDefinition, 3473 MultiTemplateParamsArg TemplateParams); 3474 3475 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3476 StorageClass& SC); 3477 void CheckConstructor(CXXConstructorDecl *Constructor); 3478 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3479 StorageClass& SC); 3480 bool CheckDestructor(CXXDestructorDecl *Destructor); 3481 void CheckConversionDeclarator(Declarator &D, QualType &R, 3482 StorageClass& SC); 3483 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3484 3485 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3486 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3487 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3488 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3489 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3490 3491 //===--------------------------------------------------------------------===// 3492 // C++ Derived Classes 3493 // 3494 3495 /// ActOnBaseSpecifier - Parsed a base specifier 3496 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3497 SourceRange SpecifierRange, 3498 bool Virtual, AccessSpecifier Access, 3499 TypeSourceInfo *TInfo, 3500 SourceLocation EllipsisLoc); 3501 3502 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3503 SourceRange SpecifierRange, 3504 bool Virtual, AccessSpecifier Access, 3505 ParsedType basetype, 3506 SourceLocation BaseLoc, 3507 SourceLocation EllipsisLoc); 3508 3509 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3510 unsigned NumBases); 3511 void ActOnBaseSpecifiers(Decl *ClassDecl, BaseTy **Bases, unsigned NumBases); 3512 3513 bool IsDerivedFrom(QualType Derived, QualType Base); 3514 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3515 3516 // FIXME: I don't like this name. 3517 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3518 3519 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3520 3521 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3522 SourceLocation Loc, SourceRange Range, 3523 CXXCastPath *BasePath = 0, 3524 bool IgnoreAccess = false); 3525 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3526 unsigned InaccessibleBaseID, 3527 unsigned AmbigiousBaseConvID, 3528 SourceLocation Loc, SourceRange Range, 3529 DeclarationName Name, 3530 CXXCastPath *BasePath); 3531 3532 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3533 3534 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3535 /// covariant, according to C++ [class.virtual]p5. 3536 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3537 const CXXMethodDecl *Old); 3538 3539 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3540 /// spec is a subset of base spec. 3541 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3542 const CXXMethodDecl *Old); 3543 3544 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3545 3546 /// CheckOverrideControl - Check C++0x override control semantics. 3547 void CheckOverrideControl(const Decl *D); 3548 3549 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3550 /// overrides a virtual member function marked 'final', according to 3551 /// C++0x [class.virtual]p3. 3552 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3553 const CXXMethodDecl *Old); 3554 3555 3556 //===--------------------------------------------------------------------===// 3557 // C++ Access Control 3558 // 3559 3560 enum AccessResult { 3561 AR_accessible, 3562 AR_inaccessible, 3563 AR_dependent, 3564 AR_delayed 3565 }; 3566 3567 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3568 NamedDecl *PrevMemberDecl, 3569 AccessSpecifier LexicalAS); 3570 3571 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3572 DeclAccessPair FoundDecl); 3573 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3574 DeclAccessPair FoundDecl); 3575 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3576 SourceRange PlacementRange, 3577 CXXRecordDecl *NamingClass, 3578 DeclAccessPair FoundDecl, 3579 bool Diagnose = true); 3580 AccessResult CheckConstructorAccess(SourceLocation Loc, 3581 CXXConstructorDecl *D, 3582 const InitializedEntity &Entity, 3583 AccessSpecifier Access, 3584 bool IsCopyBindingRefToTemp = false); 3585 AccessResult CheckConstructorAccess(SourceLocation Loc, 3586 CXXConstructorDecl *D, 3587 AccessSpecifier Access, 3588 PartialDiagnostic PD); 3589 AccessResult CheckDestructorAccess(SourceLocation Loc, 3590 CXXDestructorDecl *Dtor, 3591 const PartialDiagnostic &PDiag); 3592 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3593 NamedDecl *D, 3594 const PartialDiagnostic &PDiag); 3595 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3596 Expr *ObjectExpr, 3597 Expr *ArgExpr, 3598 DeclAccessPair FoundDecl); 3599 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3600 DeclAccessPair FoundDecl); 3601 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3602 QualType Base, QualType Derived, 3603 const CXXBasePath &Path, 3604 unsigned DiagID, 3605 bool ForceCheck = false, 3606 bool ForceUnprivileged = false); 3607 void CheckLookupAccess(const LookupResult &R); 3608 3609 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3610 const MultiLevelTemplateArgumentList &TemplateArgs); 3611 void PerformDependentDiagnostics(const DeclContext *Pattern, 3612 const MultiLevelTemplateArgumentList &TemplateArgs); 3613 3614 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3615 3616 /// A flag to suppress access checking. 3617 bool SuppressAccessChecking; 3618 3619 /// \brief When true, access checking violations are treated as SFINAE 3620 /// failures rather than hard errors. 3621 bool AccessCheckingSFINAE; 3622 3623 void ActOnStartSuppressingAccessChecks(); 3624 void ActOnStopSuppressingAccessChecks(); 3625 3626 enum AbstractDiagSelID { 3627 AbstractNone = -1, 3628 AbstractReturnType, 3629 AbstractParamType, 3630 AbstractVariableType, 3631 AbstractFieldType, 3632 AbstractArrayType 3633 }; 3634 3635 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3636 const PartialDiagnostic &PD); 3637 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3638 3639 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3640 AbstractDiagSelID SelID = AbstractNone); 3641 3642 //===--------------------------------------------------------------------===// 3643 // C++ Overloaded Operators [C++ 13.5] 3644 // 3645 3646 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3647 3648 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3649 3650 //===--------------------------------------------------------------------===// 3651 // C++ Templates [C++ 14] 3652 // 3653 void FilterAcceptableTemplateNames(LookupResult &R); 3654 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3655 3656 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3657 QualType ObjectType, bool EnteringContext, 3658 bool &MemberOfUnknownSpecialization); 3659 3660 TemplateNameKind isTemplateName(Scope *S, 3661 CXXScopeSpec &SS, 3662 bool hasTemplateKeyword, 3663 UnqualifiedId &Name, 3664 ParsedType ObjectType, 3665 bool EnteringContext, 3666 TemplateTy &Template, 3667 bool &MemberOfUnknownSpecialization); 3668 3669 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3670 SourceLocation IILoc, 3671 Scope *S, 3672 const CXXScopeSpec *SS, 3673 TemplateTy &SuggestedTemplate, 3674 TemplateNameKind &SuggestedKind); 3675 3676 bool DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3677 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3678 3679 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3680 SourceLocation EllipsisLoc, 3681 SourceLocation KeyLoc, 3682 IdentifierInfo *ParamName, 3683 SourceLocation ParamNameLoc, 3684 unsigned Depth, unsigned Position, 3685 SourceLocation EqualLoc, 3686 ParsedType DefaultArg); 3687 3688 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3689 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3690 unsigned Depth, 3691 unsigned Position, 3692 SourceLocation EqualLoc, 3693 Expr *DefaultArg); 3694 Decl *ActOnTemplateTemplateParameter(Scope *S, 3695 SourceLocation TmpLoc, 3696 TemplateParamsTy *Params, 3697 SourceLocation EllipsisLoc, 3698 IdentifierInfo *ParamName, 3699 SourceLocation ParamNameLoc, 3700 unsigned Depth, 3701 unsigned Position, 3702 SourceLocation EqualLoc, 3703 ParsedTemplateArgument DefaultArg); 3704 3705 TemplateParamsTy * 3706 ActOnTemplateParameterList(unsigned Depth, 3707 SourceLocation ExportLoc, 3708 SourceLocation TemplateLoc, 3709 SourceLocation LAngleLoc, 3710 Decl **Params, unsigned NumParams, 3711 SourceLocation RAngleLoc); 3712 3713 /// \brief The context in which we are checking a template parameter 3714 /// list. 3715 enum TemplateParamListContext { 3716 TPC_ClassTemplate, 3717 TPC_FunctionTemplate, 3718 TPC_ClassTemplateMember, 3719 TPC_FriendFunctionTemplate, 3720 TPC_FriendFunctionTemplateDefinition, 3721 TPC_TypeAliasTemplate 3722 }; 3723 3724 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3725 TemplateParameterList *OldParams, 3726 TemplateParamListContext TPC); 3727 TemplateParameterList * 3728 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3729 SourceLocation DeclLoc, 3730 const CXXScopeSpec &SS, 3731 TemplateParameterList **ParamLists, 3732 unsigned NumParamLists, 3733 bool IsFriend, 3734 bool &IsExplicitSpecialization, 3735 bool &Invalid); 3736 3737 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3738 SourceLocation KWLoc, CXXScopeSpec &SS, 3739 IdentifierInfo *Name, SourceLocation NameLoc, 3740 AttributeList *Attr, 3741 TemplateParameterList *TemplateParams, 3742 AccessSpecifier AS, 3743 unsigned NumOuterTemplateParamLists, 3744 TemplateParameterList **OuterTemplateParamLists); 3745 3746 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3747 TemplateArgumentListInfo &Out); 3748 3749 void NoteAllFoundTemplates(TemplateName Name); 3750 3751 QualType CheckTemplateIdType(TemplateName Template, 3752 SourceLocation TemplateLoc, 3753 TemplateArgumentListInfo &TemplateArgs); 3754 3755 TypeResult 3756 ActOnTemplateIdType(CXXScopeSpec &SS, 3757 TemplateTy Template, SourceLocation TemplateLoc, 3758 SourceLocation LAngleLoc, 3759 ASTTemplateArgsPtr TemplateArgs, 3760 SourceLocation RAngleLoc); 3761 3762 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3763 /// such as \c class T::template apply<U>. 3764 /// 3765 /// \param TUK 3766 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3767 TypeSpecifierType TagSpec, 3768 SourceLocation TagLoc, 3769 CXXScopeSpec &SS, 3770 TemplateTy TemplateD, 3771 SourceLocation TemplateLoc, 3772 SourceLocation LAngleLoc, 3773 ASTTemplateArgsPtr TemplateArgsIn, 3774 SourceLocation RAngleLoc); 3775 3776 3777 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3778 LookupResult &R, 3779 bool RequiresADL, 3780 const TemplateArgumentListInfo &TemplateArgs); 3781 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3782 const DeclarationNameInfo &NameInfo, 3783 const TemplateArgumentListInfo &TemplateArgs); 3784 3785 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3786 SourceLocation TemplateKWLoc, 3787 CXXScopeSpec &SS, 3788 UnqualifiedId &Name, 3789 ParsedType ObjectType, 3790 bool EnteringContext, 3791 TemplateTy &Template); 3792 3793 DeclResult 3794 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3795 SourceLocation KWLoc, 3796 CXXScopeSpec &SS, 3797 TemplateTy Template, 3798 SourceLocation TemplateNameLoc, 3799 SourceLocation LAngleLoc, 3800 ASTTemplateArgsPtr TemplateArgs, 3801 SourceLocation RAngleLoc, 3802 AttributeList *Attr, 3803 MultiTemplateParamsArg TemplateParameterLists); 3804 3805 Decl *ActOnTemplateDeclarator(Scope *S, 3806 MultiTemplateParamsArg TemplateParameterLists, 3807 Declarator &D); 3808 3809 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3810 MultiTemplateParamsArg TemplateParameterLists, 3811 Declarator &D); 3812 3813 bool 3814 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3815 TemplateSpecializationKind NewTSK, 3816 NamedDecl *PrevDecl, 3817 TemplateSpecializationKind PrevTSK, 3818 SourceLocation PrevPtOfInstantiation, 3819 bool &SuppressNew); 3820 3821 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3822 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3823 LookupResult &Previous); 3824 3825 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 3826 TemplateArgumentListInfo *ExplicitTemplateArgs, 3827 LookupResult &Previous); 3828 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 3829 3830 DeclResult 3831 ActOnExplicitInstantiation(Scope *S, 3832 SourceLocation ExternLoc, 3833 SourceLocation TemplateLoc, 3834 unsigned TagSpec, 3835 SourceLocation KWLoc, 3836 const CXXScopeSpec &SS, 3837 TemplateTy Template, 3838 SourceLocation TemplateNameLoc, 3839 SourceLocation LAngleLoc, 3840 ASTTemplateArgsPtr TemplateArgs, 3841 SourceLocation RAngleLoc, 3842 AttributeList *Attr); 3843 3844 DeclResult 3845 ActOnExplicitInstantiation(Scope *S, 3846 SourceLocation ExternLoc, 3847 SourceLocation TemplateLoc, 3848 unsigned TagSpec, 3849 SourceLocation KWLoc, 3850 CXXScopeSpec &SS, 3851 IdentifierInfo *Name, 3852 SourceLocation NameLoc, 3853 AttributeList *Attr); 3854 3855 DeclResult ActOnExplicitInstantiation(Scope *S, 3856 SourceLocation ExternLoc, 3857 SourceLocation TemplateLoc, 3858 Declarator &D); 3859 3860 TemplateArgumentLoc 3861 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 3862 SourceLocation TemplateLoc, 3863 SourceLocation RAngleLoc, 3864 Decl *Param, 3865 SmallVectorImpl<TemplateArgument> &Converted); 3866 3867 /// \brief Specifies the context in which a particular template 3868 /// argument is being checked. 3869 enum CheckTemplateArgumentKind { 3870 /// \brief The template argument was specified in the code or was 3871 /// instantiated with some deduced template arguments. 3872 CTAK_Specified, 3873 3874 /// \brief The template argument was deduced via template argument 3875 /// deduction. 3876 CTAK_Deduced, 3877 3878 /// \brief The template argument was deduced from an array bound 3879 /// via template argument deduction. 3880 CTAK_DeducedFromArrayBound 3881 }; 3882 3883 bool CheckTemplateArgument(NamedDecl *Param, 3884 const TemplateArgumentLoc &Arg, 3885 NamedDecl *Template, 3886 SourceLocation TemplateLoc, 3887 SourceLocation RAngleLoc, 3888 unsigned ArgumentPackIndex, 3889 SmallVectorImpl<TemplateArgument> &Converted, 3890 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3891 3892 /// \brief Check that the given template arguments can be be provided to 3893 /// the given template, converting the arguments along the way. 3894 /// 3895 /// \param Template The template to which the template arguments are being 3896 /// provided. 3897 /// 3898 /// \param TemplateLoc The location of the template name in the source. 3899 /// 3900 /// \param TemplateArgs The list of template arguments. If the template is 3901 /// a template template parameter, this function may extend the set of 3902 /// template arguments to also include substituted, defaulted template 3903 /// arguments. 3904 /// 3905 /// \param PartialTemplateArgs True if the list of template arguments is 3906 /// intentionally partial, e.g., because we're checking just the initial 3907 /// set of template arguments. 3908 /// 3909 /// \param Converted Will receive the converted, canonicalized template 3910 /// arguments. 3911 /// 3912 /// \returns True if an error occurred, false otherwise. 3913 bool CheckTemplateArgumentList(TemplateDecl *Template, 3914 SourceLocation TemplateLoc, 3915 TemplateArgumentListInfo &TemplateArgs, 3916 bool PartialTemplateArgs, 3917 SmallVectorImpl<TemplateArgument> &Converted); 3918 3919 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 3920 const TemplateArgumentLoc &Arg, 3921 SmallVectorImpl<TemplateArgument> &Converted); 3922 3923 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 3924 TypeSourceInfo *Arg); 3925 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 3926 TemplateArgument &Converted); 3927 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 3928 QualType InstantiatedParamType, Expr *Arg, 3929 TemplateArgument &Converted, 3930 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3931 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 3932 const TemplateArgumentLoc &Arg); 3933 3934 ExprResult 3935 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 3936 QualType ParamType, 3937 SourceLocation Loc); 3938 ExprResult 3939 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 3940 SourceLocation Loc); 3941 3942 /// \brief Enumeration describing how template parameter lists are compared 3943 /// for equality. 3944 enum TemplateParameterListEqualKind { 3945 /// \brief We are matching the template parameter lists of two templates 3946 /// that might be redeclarations. 3947 /// 3948 /// \code 3949 /// template<typename T> struct X; 3950 /// template<typename T> struct X; 3951 /// \endcode 3952 TPL_TemplateMatch, 3953 3954 /// \brief We are matching the template parameter lists of two template 3955 /// template parameters as part of matching the template parameter lists 3956 /// of two templates that might be redeclarations. 3957 /// 3958 /// \code 3959 /// template<template<int I> class TT> struct X; 3960 /// template<template<int Value> class Other> struct X; 3961 /// \endcode 3962 TPL_TemplateTemplateParmMatch, 3963 3964 /// \brief We are matching the template parameter lists of a template 3965 /// template argument against the template parameter lists of a template 3966 /// template parameter. 3967 /// 3968 /// \code 3969 /// template<template<int Value> class Metafun> struct X; 3970 /// template<int Value> struct integer_c; 3971 /// X<integer_c> xic; 3972 /// \endcode 3973 TPL_TemplateTemplateArgumentMatch 3974 }; 3975 3976 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 3977 TemplateParameterList *Old, 3978 bool Complain, 3979 TemplateParameterListEqualKind Kind, 3980 SourceLocation TemplateArgLoc 3981 = SourceLocation()); 3982 3983 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 3984 3985 /// \brief Called when the parser has parsed a C++ typename 3986 /// specifier, e.g., "typename T::type". 3987 /// 3988 /// \param S The scope in which this typename type occurs. 3989 /// \param TypenameLoc the location of the 'typename' keyword 3990 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3991 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 3992 /// \param IdLoc the location of the identifier. 3993 TypeResult 3994 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3995 const CXXScopeSpec &SS, const IdentifierInfo &II, 3996 SourceLocation IdLoc); 3997 3998 /// \brief Called when the parser has parsed a C++ typename 3999 /// specifier that ends in a template-id, e.g., 4000 /// "typename MetaFun::template apply<T1, T2>". 4001 /// 4002 /// \param S The scope in which this typename type occurs. 4003 /// \param TypenameLoc the location of the 'typename' keyword 4004 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4005 /// \param TemplateLoc the location of the 'template' keyword, if any. 4006 /// \param TemplateName The template name. 4007 /// \param TemplateNameLoc The location of the template name. 4008 /// \param LAngleLoc The location of the opening angle bracket ('<'). 4009 /// \param TemplateArgs The template arguments. 4010 /// \param RAngleLoc The location of the closing angle bracket ('>'). 4011 TypeResult 4012 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4013 const CXXScopeSpec &SS, 4014 SourceLocation TemplateLoc, 4015 TemplateTy Template, 4016 SourceLocation TemplateNameLoc, 4017 SourceLocation LAngleLoc, 4018 ASTTemplateArgsPtr TemplateArgs, 4019 SourceLocation RAngleLoc); 4020 4021 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 4022 SourceLocation KeywordLoc, 4023 NestedNameSpecifierLoc QualifierLoc, 4024 const IdentifierInfo &II, 4025 SourceLocation IILoc); 4026 4027 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 4028 SourceLocation Loc, 4029 DeclarationName Name); 4030 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 4031 4032 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 4033 4034 std::string 4035 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4036 const TemplateArgumentList &Args); 4037 4038 std::string 4039 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4040 const TemplateArgument *Args, 4041 unsigned NumArgs); 4042 4043 //===--------------------------------------------------------------------===// 4044 // C++ Variadic Templates (C++0x [temp.variadic]) 4045 //===--------------------------------------------------------------------===// 4046 4047 /// \brief The context in which an unexpanded parameter pack is 4048 /// being diagnosed. 4049 /// 4050 /// Note that the values of this enumeration line up with the first 4051 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4052 enum UnexpandedParameterPackContext { 4053 /// \brief An arbitrary expression. 4054 UPPC_Expression = 0, 4055 4056 /// \brief The base type of a class type. 4057 UPPC_BaseType, 4058 4059 /// \brief The type of an arbitrary declaration. 4060 UPPC_DeclarationType, 4061 4062 /// \brief The type of a data member. 4063 UPPC_DataMemberType, 4064 4065 /// \brief The size of a bit-field. 4066 UPPC_BitFieldWidth, 4067 4068 /// \brief The expression in a static assertion. 4069 UPPC_StaticAssertExpression, 4070 4071 /// \brief The fixed underlying type of an enumeration. 4072 UPPC_FixedUnderlyingType, 4073 4074 /// \brief The enumerator value. 4075 UPPC_EnumeratorValue, 4076 4077 /// \brief A using declaration. 4078 UPPC_UsingDeclaration, 4079 4080 /// \brief A friend declaration. 4081 UPPC_FriendDeclaration, 4082 4083 /// \brief A declaration qualifier. 4084 UPPC_DeclarationQualifier, 4085 4086 /// \brief An initializer. 4087 UPPC_Initializer, 4088 4089 /// \brief A default argument. 4090 UPPC_DefaultArgument, 4091 4092 /// \brief The type of a non-type template parameter. 4093 UPPC_NonTypeTemplateParameterType, 4094 4095 /// \brief The type of an exception. 4096 UPPC_ExceptionType, 4097 4098 /// \brief Partial specialization. 4099 UPPC_PartialSpecialization 4100 }; 4101 4102 /// \brief If the given type contains an unexpanded parameter pack, 4103 /// diagnose the error. 4104 /// 4105 /// \param Loc The source location where a diagnostc should be emitted. 4106 /// 4107 /// \param T The type that is being checked for unexpanded parameter 4108 /// packs. 4109 /// 4110 /// \returns true if an error occurred, false otherwise. 4111 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4112 UnexpandedParameterPackContext UPPC); 4113 4114 /// \brief If the given expression contains an unexpanded parameter 4115 /// pack, diagnose the error. 4116 /// 4117 /// \param E The expression that is being checked for unexpanded 4118 /// parameter packs. 4119 /// 4120 /// \returns true if an error occurred, false otherwise. 4121 bool DiagnoseUnexpandedParameterPack(Expr *E, 4122 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4123 4124 /// \brief If the given nested-name-specifier contains an unexpanded 4125 /// parameter pack, diagnose the error. 4126 /// 4127 /// \param SS The nested-name-specifier that is being checked for 4128 /// unexpanded parameter packs. 4129 /// 4130 /// \returns true if an error occurred, false otherwise. 4131 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4132 UnexpandedParameterPackContext UPPC); 4133 4134 /// \brief If the given name contains an unexpanded parameter pack, 4135 /// diagnose the error. 4136 /// 4137 /// \param NameInfo The name (with source location information) that 4138 /// is being checked for unexpanded parameter packs. 4139 /// 4140 /// \returns true if an error occurred, false otherwise. 4141 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4142 UnexpandedParameterPackContext UPPC); 4143 4144 /// \brief If the given template name contains an unexpanded parameter pack, 4145 /// diagnose the error. 4146 /// 4147 /// \param Loc The location of the template name. 4148 /// 4149 /// \param Template The template name that is being checked for unexpanded 4150 /// parameter packs. 4151 /// 4152 /// \returns true if an error occurred, false otherwise. 4153 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4154 TemplateName Template, 4155 UnexpandedParameterPackContext UPPC); 4156 4157 /// \brief If the given template argument contains an unexpanded parameter 4158 /// pack, diagnose the error. 4159 /// 4160 /// \param Arg The template argument that is being checked for unexpanded 4161 /// parameter packs. 4162 /// 4163 /// \returns true if an error occurred, false otherwise. 4164 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4165 UnexpandedParameterPackContext UPPC); 4166 4167 /// \brief Collect the set of unexpanded parameter packs within the given 4168 /// template argument. 4169 /// 4170 /// \param Arg The template argument that will be traversed to find 4171 /// unexpanded parameter packs. 4172 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4173 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4174 4175 /// \brief Collect the set of unexpanded parameter packs within the given 4176 /// template argument. 4177 /// 4178 /// \param Arg The template argument that will be traversed to find 4179 /// unexpanded parameter packs. 4180 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4181 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4182 4183 /// \brief Collect the set of unexpanded parameter packs within the given 4184 /// type. 4185 /// 4186 /// \param T The type that will be traversed to find 4187 /// unexpanded parameter packs. 4188 void collectUnexpandedParameterPacks(QualType T, 4189 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4190 4191 /// \brief Collect the set of unexpanded parameter packs within the given 4192 /// type. 4193 /// 4194 /// \param TL The type that will be traversed to find 4195 /// unexpanded parameter packs. 4196 void collectUnexpandedParameterPacks(TypeLoc TL, 4197 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4198 4199 /// \brief Invoked when parsing a template argument followed by an 4200 /// ellipsis, which creates a pack expansion. 4201 /// 4202 /// \param Arg The template argument preceding the ellipsis, which 4203 /// may already be invalid. 4204 /// 4205 /// \param EllipsisLoc The location of the ellipsis. 4206 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4207 SourceLocation EllipsisLoc); 4208 4209 /// \brief Invoked when parsing a type followed by an ellipsis, which 4210 /// creates a pack expansion. 4211 /// 4212 /// \param Type The type preceding the ellipsis, which will become 4213 /// the pattern of the pack expansion. 4214 /// 4215 /// \param EllipsisLoc The location of the ellipsis. 4216 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4217 4218 /// \brief Construct a pack expansion type from the pattern of the pack 4219 /// expansion. 4220 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4221 SourceLocation EllipsisLoc, 4222 llvm::Optional<unsigned> NumExpansions); 4223 4224 /// \brief Construct a pack expansion type from the pattern of the pack 4225 /// expansion. 4226 QualType CheckPackExpansion(QualType Pattern, 4227 SourceRange PatternRange, 4228 SourceLocation EllipsisLoc, 4229 llvm::Optional<unsigned> NumExpansions); 4230 4231 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4232 /// creates a pack expansion. 4233 /// 4234 /// \param Pattern The expression preceding the ellipsis, which will become 4235 /// the pattern of the pack expansion. 4236 /// 4237 /// \param EllipsisLoc The location of the ellipsis. 4238 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4239 4240 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4241 /// creates a pack expansion. 4242 /// 4243 /// \param Pattern The expression preceding the ellipsis, which will become 4244 /// the pattern of the pack expansion. 4245 /// 4246 /// \param EllipsisLoc The location of the ellipsis. 4247 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4248 llvm::Optional<unsigned> NumExpansions); 4249 4250 /// \brief Determine whether we could expand a pack expansion with the 4251 /// given set of parameter packs into separate arguments by repeatedly 4252 /// transforming the pattern. 4253 /// 4254 /// \param EllipsisLoc The location of the ellipsis that identifies the 4255 /// pack expansion. 4256 /// 4257 /// \param PatternRange The source range that covers the entire pattern of 4258 /// the pack expansion. 4259 /// 4260 /// \param Unexpanded The set of unexpanded parameter packs within the 4261 /// pattern. 4262 /// 4263 /// \param NumUnexpanded The number of unexpanded parameter packs in 4264 /// \p Unexpanded. 4265 /// 4266 /// \param ShouldExpand Will be set to \c true if the transformer should 4267 /// expand the corresponding pack expansions into separate arguments. When 4268 /// set, \c NumExpansions must also be set. 4269 /// 4270 /// \param RetainExpansion Whether the caller should add an unexpanded 4271 /// pack expansion after all of the expanded arguments. This is used 4272 /// when extending explicitly-specified template argument packs per 4273 /// C++0x [temp.arg.explicit]p9. 4274 /// 4275 /// \param NumExpansions The number of separate arguments that will be in 4276 /// the expanded form of the corresponding pack expansion. This is both an 4277 /// input and an output parameter, which can be set by the caller if the 4278 /// number of expansions is known a priori (e.g., due to a prior substitution) 4279 /// and will be set by the callee when the number of expansions is known. 4280 /// The callee must set this value when \c ShouldExpand is \c true; it may 4281 /// set this value in other cases. 4282 /// 4283 /// \returns true if an error occurred (e.g., because the parameter packs 4284 /// are to be instantiated with arguments of different lengths), false 4285 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4286 /// must be set. 4287 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4288 SourceRange PatternRange, 4289 const UnexpandedParameterPack *Unexpanded, 4290 unsigned NumUnexpanded, 4291 const MultiLevelTemplateArgumentList &TemplateArgs, 4292 bool &ShouldExpand, 4293 bool &RetainExpansion, 4294 llvm::Optional<unsigned> &NumExpansions); 4295 4296 /// \brief Determine the number of arguments in the given pack expansion 4297 /// type. 4298 /// 4299 /// This routine already assumes that the pack expansion type can be 4300 /// expanded and that the number of arguments in the expansion is 4301 /// consistent across all of the unexpanded parameter packs in its pattern. 4302 unsigned getNumArgumentsInExpansion(QualType T, 4303 const MultiLevelTemplateArgumentList &TemplateArgs); 4304 4305 /// \brief Determine whether the given declarator contains any unexpanded 4306 /// parameter packs. 4307 /// 4308 /// This routine is used by the parser to disambiguate function declarators 4309 /// with an ellipsis prior to the ')', e.g., 4310 /// 4311 /// \code 4312 /// void f(T...); 4313 /// \endcode 4314 /// 4315 /// To determine whether we have an (unnamed) function parameter pack or 4316 /// a variadic function. 4317 /// 4318 /// \returns true if the declarator contains any unexpanded parameter packs, 4319 /// false otherwise. 4320 bool containsUnexpandedParameterPacks(Declarator &D); 4321 4322 //===--------------------------------------------------------------------===// 4323 // C++ Template Argument Deduction (C++ [temp.deduct]) 4324 //===--------------------------------------------------------------------===// 4325 4326 /// \brief Describes the result of template argument deduction. 4327 /// 4328 /// The TemplateDeductionResult enumeration describes the result of 4329 /// template argument deduction, as returned from 4330 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4331 /// structure provides additional information about the results of 4332 /// template argument deduction, e.g., the deduced template argument 4333 /// list (if successful) or the specific template parameters or 4334 /// deduced arguments that were involved in the failure. 4335 enum TemplateDeductionResult { 4336 /// \brief Template argument deduction was successful. 4337 TDK_Success = 0, 4338 /// \brief Template argument deduction exceeded the maximum template 4339 /// instantiation depth (which has already been diagnosed). 4340 TDK_InstantiationDepth, 4341 /// \brief Template argument deduction did not deduce a value 4342 /// for every template parameter. 4343 TDK_Incomplete, 4344 /// \brief Template argument deduction produced inconsistent 4345 /// deduced values for the given template parameter. 4346 TDK_Inconsistent, 4347 /// \brief Template argument deduction failed due to inconsistent 4348 /// cv-qualifiers on a template parameter type that would 4349 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4350 /// but were given a non-const "X". 4351 TDK_Underqualified, 4352 /// \brief Substitution of the deduced template argument values 4353 /// resulted in an error. 4354 TDK_SubstitutionFailure, 4355 /// \brief Substitution of the deduced template argument values 4356 /// into a non-deduced context produced a type or value that 4357 /// produces a type that does not match the original template 4358 /// arguments provided. 4359 TDK_NonDeducedMismatch, 4360 /// \brief When performing template argument deduction for a function 4361 /// template, there were too many call arguments. 4362 TDK_TooManyArguments, 4363 /// \brief When performing template argument deduction for a function 4364 /// template, there were too few call arguments. 4365 TDK_TooFewArguments, 4366 /// \brief The explicitly-specified template arguments were not valid 4367 /// template arguments for the given template. 4368 TDK_InvalidExplicitArguments, 4369 /// \brief The arguments included an overloaded function name that could 4370 /// not be resolved to a suitable function. 4371 TDK_FailedOverloadResolution 4372 }; 4373 4374 TemplateDeductionResult 4375 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4376 const TemplateArgumentList &TemplateArgs, 4377 sema::TemplateDeductionInfo &Info); 4378 4379 TemplateDeductionResult 4380 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4381 TemplateArgumentListInfo &ExplicitTemplateArgs, 4382 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4383 SmallVectorImpl<QualType> &ParamTypes, 4384 QualType *FunctionType, 4385 sema::TemplateDeductionInfo &Info); 4386 4387 /// brief A function argument from which we performed template argument 4388 // deduction for a call. 4389 struct OriginalCallArg { 4390 OriginalCallArg(QualType OriginalParamType, 4391 unsigned ArgIdx, 4392 QualType OriginalArgType) 4393 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4394 OriginalArgType(OriginalArgType) { } 4395 4396 QualType OriginalParamType; 4397 unsigned ArgIdx; 4398 QualType OriginalArgType; 4399 }; 4400 4401 TemplateDeductionResult 4402 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4403 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4404 unsigned NumExplicitlySpecified, 4405 FunctionDecl *&Specialization, 4406 sema::TemplateDeductionInfo &Info, 4407 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4408 4409 TemplateDeductionResult 4410 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4411 TemplateArgumentListInfo *ExplicitTemplateArgs, 4412 Expr **Args, unsigned NumArgs, 4413 FunctionDecl *&Specialization, 4414 sema::TemplateDeductionInfo &Info); 4415 4416 TemplateDeductionResult 4417 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4418 TemplateArgumentListInfo *ExplicitTemplateArgs, 4419 QualType ArgFunctionType, 4420 FunctionDecl *&Specialization, 4421 sema::TemplateDeductionInfo &Info); 4422 4423 TemplateDeductionResult 4424 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4425 QualType ToType, 4426 CXXConversionDecl *&Specialization, 4427 sema::TemplateDeductionInfo &Info); 4428 4429 TemplateDeductionResult 4430 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4431 TemplateArgumentListInfo *ExplicitTemplateArgs, 4432 FunctionDecl *&Specialization, 4433 sema::TemplateDeductionInfo &Info); 4434 4435 bool DeduceAutoType(TypeSourceInfo *AutoType, Expr *Initializer, 4436 TypeSourceInfo *&Result); 4437 4438 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4439 FunctionTemplateDecl *FT2, 4440 SourceLocation Loc, 4441 TemplatePartialOrderingContext TPOC, 4442 unsigned NumCallArguments); 4443 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4444 UnresolvedSetIterator SEnd, 4445 TemplatePartialOrderingContext TPOC, 4446 unsigned NumCallArguments, 4447 SourceLocation Loc, 4448 const PartialDiagnostic &NoneDiag, 4449 const PartialDiagnostic &AmbigDiag, 4450 const PartialDiagnostic &CandidateDiag, 4451 bool Complain = true); 4452 4453 ClassTemplatePartialSpecializationDecl * 4454 getMoreSpecializedPartialSpecialization( 4455 ClassTemplatePartialSpecializationDecl *PS1, 4456 ClassTemplatePartialSpecializationDecl *PS2, 4457 SourceLocation Loc); 4458 4459 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4460 bool OnlyDeduced, 4461 unsigned Depth, 4462 SmallVectorImpl<bool> &Used); 4463 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4464 SmallVectorImpl<bool> &Deduced); 4465 4466 //===--------------------------------------------------------------------===// 4467 // C++ Template Instantiation 4468 // 4469 4470 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4471 const TemplateArgumentList *Innermost = 0, 4472 bool RelativeToPrimary = false, 4473 const FunctionDecl *Pattern = 0); 4474 4475 /// \brief A template instantiation that is currently in progress. 4476 struct ActiveTemplateInstantiation { 4477 /// \brief The kind of template instantiation we are performing 4478 enum InstantiationKind { 4479 /// We are instantiating a template declaration. The entity is 4480 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4481 TemplateInstantiation, 4482 4483 /// We are instantiating a default argument for a template 4484 /// parameter. The Entity is the template, and 4485 /// TemplateArgs/NumTemplateArguments provides the template 4486 /// arguments as specified. 4487 /// FIXME: Use a TemplateArgumentList 4488 DefaultTemplateArgumentInstantiation, 4489 4490 /// We are instantiating a default argument for a function. 4491 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4492 /// provides the template arguments as specified. 4493 DefaultFunctionArgumentInstantiation, 4494 4495 /// We are substituting explicit template arguments provided for 4496 /// a function template. The entity is a FunctionTemplateDecl. 4497 ExplicitTemplateArgumentSubstitution, 4498 4499 /// We are substituting template argument determined as part of 4500 /// template argument deduction for either a class template 4501 /// partial specialization or a function template. The 4502 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4503 /// a FunctionTemplateDecl. 4504 DeducedTemplateArgumentSubstitution, 4505 4506 /// We are substituting prior template arguments into a new 4507 /// template parameter. The template parameter itself is either a 4508 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4509 PriorTemplateArgumentSubstitution, 4510 4511 /// We are checking the validity of a default template argument that 4512 /// has been used when naming a template-id. 4513 DefaultTemplateArgumentChecking 4514 } Kind; 4515 4516 /// \brief The point of instantiation within the source code. 4517 SourceLocation PointOfInstantiation; 4518 4519 /// \brief The template (or partial specialization) in which we are 4520 /// performing the instantiation, for substitutions of prior template 4521 /// arguments. 4522 NamedDecl *Template; 4523 4524 /// \brief The entity that is being instantiated. 4525 uintptr_t Entity; 4526 4527 /// \brief The list of template arguments we are substituting, if they 4528 /// are not part of the entity. 4529 const TemplateArgument *TemplateArgs; 4530 4531 /// \brief The number of template arguments in TemplateArgs. 4532 unsigned NumTemplateArgs; 4533 4534 /// \brief The template deduction info object associated with the 4535 /// substitution or checking of explicit or deduced template arguments. 4536 sema::TemplateDeductionInfo *DeductionInfo; 4537 4538 /// \brief The source range that covers the construct that cause 4539 /// the instantiation, e.g., the template-id that causes a class 4540 /// template instantiation. 4541 SourceRange InstantiationRange; 4542 4543 ActiveTemplateInstantiation() 4544 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4545 NumTemplateArgs(0), DeductionInfo(0) {} 4546 4547 /// \brief Determines whether this template is an actual instantiation 4548 /// that should be counted toward the maximum instantiation depth. 4549 bool isInstantiationRecord() const; 4550 4551 friend bool operator==(const ActiveTemplateInstantiation &X, 4552 const ActiveTemplateInstantiation &Y) { 4553 if (X.Kind != Y.Kind) 4554 return false; 4555 4556 if (X.Entity != Y.Entity) 4557 return false; 4558 4559 switch (X.Kind) { 4560 case TemplateInstantiation: 4561 return true; 4562 4563 case PriorTemplateArgumentSubstitution: 4564 case DefaultTemplateArgumentChecking: 4565 if (X.Template != Y.Template) 4566 return false; 4567 4568 // Fall through 4569 4570 case DefaultTemplateArgumentInstantiation: 4571 case ExplicitTemplateArgumentSubstitution: 4572 case DeducedTemplateArgumentSubstitution: 4573 case DefaultFunctionArgumentInstantiation: 4574 return X.TemplateArgs == Y.TemplateArgs; 4575 4576 } 4577 4578 return true; 4579 } 4580 4581 friend bool operator!=(const ActiveTemplateInstantiation &X, 4582 const ActiveTemplateInstantiation &Y) { 4583 return !(X == Y); 4584 } 4585 }; 4586 4587 /// \brief List of active template instantiations. 4588 /// 4589 /// This vector is treated as a stack. As one template instantiation 4590 /// requires another template instantiation, additional 4591 /// instantiations are pushed onto the stack up to a 4592 /// user-configurable limit LangOptions::InstantiationDepth. 4593 SmallVector<ActiveTemplateInstantiation, 16> 4594 ActiveTemplateInstantiations; 4595 4596 /// \brief Whether we are in a SFINAE context that is not associated with 4597 /// template instantiation. 4598 /// 4599 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4600 /// of a template instantiation or template argument deduction. 4601 bool InNonInstantiationSFINAEContext; 4602 4603 /// \brief The number of ActiveTemplateInstantiation entries in 4604 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4605 /// therefore, should not be counted as part of the instantiation depth. 4606 unsigned NonInstantiationEntries; 4607 4608 /// \brief The last template from which a template instantiation 4609 /// error or warning was produced. 4610 /// 4611 /// This value is used to suppress printing of redundant template 4612 /// instantiation backtraces when there are multiple errors in the 4613 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4614 /// to implement it anywhere else. 4615 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4616 4617 /// \brief The current index into pack expansion arguments that will be 4618 /// used for substitution of parameter packs. 4619 /// 4620 /// The pack expansion index will be -1 to indicate that parameter packs 4621 /// should be instantiated as themselves. Otherwise, the index specifies 4622 /// which argument within the parameter pack will be used for substitution. 4623 int ArgumentPackSubstitutionIndex; 4624 4625 /// \brief RAII object used to change the argument pack substitution index 4626 /// within a \c Sema object. 4627 /// 4628 /// See \c ArgumentPackSubstitutionIndex for more information. 4629 class ArgumentPackSubstitutionIndexRAII { 4630 Sema &Self; 4631 int OldSubstitutionIndex; 4632 4633 public: 4634 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4635 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4636 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4637 } 4638 4639 ~ArgumentPackSubstitutionIndexRAII() { 4640 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4641 } 4642 }; 4643 4644 friend class ArgumentPackSubstitutionRAII; 4645 4646 /// \brief The stack of calls expression undergoing template instantiation. 4647 /// 4648 /// The top of this stack is used by a fixit instantiating unresolved 4649 /// function calls to fix the AST to match the textual change it prints. 4650 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4651 4652 /// \brief For each declaration that involved template argument deduction, the 4653 /// set of diagnostics that were suppressed during that template argument 4654 /// deduction. 4655 /// 4656 /// FIXME: Serialize this structure to the AST file. 4657 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 4658 SuppressedDiagnostics; 4659 4660 /// \brief A stack object to be created when performing template 4661 /// instantiation. 4662 /// 4663 /// Construction of an object of type \c InstantiatingTemplate 4664 /// pushes the current instantiation onto the stack of active 4665 /// instantiations. If the size of this stack exceeds the maximum 4666 /// number of recursive template instantiations, construction 4667 /// produces an error and evaluates true. 4668 /// 4669 /// Destruction of this object will pop the named instantiation off 4670 /// the stack. 4671 struct InstantiatingTemplate { 4672 /// \brief Note that we are instantiating a class template, 4673 /// function template, or a member thereof. 4674 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4675 Decl *Entity, 4676 SourceRange InstantiationRange = SourceRange()); 4677 4678 /// \brief Note that we are instantiating a default argument in a 4679 /// template-id. 4680 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4681 TemplateDecl *Template, 4682 const TemplateArgument *TemplateArgs, 4683 unsigned NumTemplateArgs, 4684 SourceRange InstantiationRange = SourceRange()); 4685 4686 /// \brief Note that we are instantiating a default argument in a 4687 /// template-id. 4688 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4689 FunctionTemplateDecl *FunctionTemplate, 4690 const TemplateArgument *TemplateArgs, 4691 unsigned NumTemplateArgs, 4692 ActiveTemplateInstantiation::InstantiationKind Kind, 4693 sema::TemplateDeductionInfo &DeductionInfo, 4694 SourceRange InstantiationRange = SourceRange()); 4695 4696 /// \brief Note that we are instantiating as part of template 4697 /// argument deduction for a class template partial 4698 /// specialization. 4699 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4700 ClassTemplatePartialSpecializationDecl *PartialSpec, 4701 const TemplateArgument *TemplateArgs, 4702 unsigned NumTemplateArgs, 4703 sema::TemplateDeductionInfo &DeductionInfo, 4704 SourceRange InstantiationRange = SourceRange()); 4705 4706 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4707 ParmVarDecl *Param, 4708 const TemplateArgument *TemplateArgs, 4709 unsigned NumTemplateArgs, 4710 SourceRange InstantiationRange = SourceRange()); 4711 4712 /// \brief Note that we are substituting prior template arguments into a 4713 /// non-type or template template parameter. 4714 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4715 NamedDecl *Template, 4716 NonTypeTemplateParmDecl *Param, 4717 const TemplateArgument *TemplateArgs, 4718 unsigned NumTemplateArgs, 4719 SourceRange InstantiationRange); 4720 4721 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4722 NamedDecl *Template, 4723 TemplateTemplateParmDecl *Param, 4724 const TemplateArgument *TemplateArgs, 4725 unsigned NumTemplateArgs, 4726 SourceRange InstantiationRange); 4727 4728 /// \brief Note that we are checking the default template argument 4729 /// against the template parameter for a given template-id. 4730 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4731 TemplateDecl *Template, 4732 NamedDecl *Param, 4733 const TemplateArgument *TemplateArgs, 4734 unsigned NumTemplateArgs, 4735 SourceRange InstantiationRange); 4736 4737 4738 /// \brief Note that we have finished instantiating this template. 4739 void Clear(); 4740 4741 ~InstantiatingTemplate() { Clear(); } 4742 4743 /// \brief Determines whether we have exceeded the maximum 4744 /// recursive template instantiations. 4745 operator bool() const { return Invalid; } 4746 4747 private: 4748 Sema &SemaRef; 4749 bool Invalid; 4750 bool SavedInNonInstantiationSFINAEContext; 4751 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4752 SourceRange InstantiationRange); 4753 4754 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4755 4756 InstantiatingTemplate& 4757 operator=(const InstantiatingTemplate&); // not implemented 4758 }; 4759 4760 void PrintInstantiationStack(); 4761 4762 /// \brief Determines whether we are currently in a context where 4763 /// template argument substitution failures are not considered 4764 /// errors. 4765 /// 4766 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4767 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4768 /// template-deduction context object, which can be used to capture 4769 /// diagnostics that will be suppressed. 4770 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4771 4772 /// \brief RAII class used to determine whether SFINAE has 4773 /// trapped any errors that occur during template argument 4774 /// deduction.` 4775 class SFINAETrap { 4776 Sema &SemaRef; 4777 unsigned PrevSFINAEErrors; 4778 bool PrevInNonInstantiationSFINAEContext; 4779 bool PrevAccessCheckingSFINAE; 4780 4781 public: 4782 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 4783 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 4784 PrevInNonInstantiationSFINAEContext( 4785 SemaRef.InNonInstantiationSFINAEContext), 4786 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 4787 { 4788 if (!SemaRef.isSFINAEContext()) 4789 SemaRef.InNonInstantiationSFINAEContext = true; 4790 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 4791 } 4792 4793 ~SFINAETrap() { 4794 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 4795 SemaRef.InNonInstantiationSFINAEContext 4796 = PrevInNonInstantiationSFINAEContext; 4797 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 4798 } 4799 4800 /// \brief Determine whether any SFINAE errors have been trapped. 4801 bool hasErrorOccurred() const { 4802 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 4803 } 4804 }; 4805 4806 /// \brief The current instantiation scope used to store local 4807 /// variables. 4808 LocalInstantiationScope *CurrentInstantiationScope; 4809 4810 /// \brief The number of typos corrected by CorrectTypo. 4811 unsigned TyposCorrected; 4812 4813 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 4814 UnqualifiedTyposCorrectedMap; 4815 4816 /// \brief A cache containing the results of typo correction for unqualified 4817 /// name lookup. 4818 /// 4819 /// The string is the string that we corrected to (which may be empty, if 4820 /// there was no correction), while the boolean will be true when the 4821 /// string represents a keyword. 4822 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 4823 4824 /// \brief Worker object for performing CFG-based warnings. 4825 sema::AnalysisBasedWarnings AnalysisWarnings; 4826 4827 /// \brief An entity for which implicit template instantiation is required. 4828 /// 4829 /// The source location associated with the declaration is the first place in 4830 /// the source code where the declaration was "used". It is not necessarily 4831 /// the point of instantiation (which will be either before or after the 4832 /// namespace-scope declaration that triggered this implicit instantiation), 4833 /// However, it is the location that diagnostics should generally refer to, 4834 /// because users will need to know what code triggered the instantiation. 4835 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 4836 4837 /// \brief The queue of implicit template instantiations that are required 4838 /// but have not yet been performed. 4839 std::deque<PendingImplicitInstantiation> PendingInstantiations; 4840 4841 /// \brief The queue of implicit template instantiations that are required 4842 /// and must be performed within the current local scope. 4843 /// 4844 /// This queue is only used for member functions of local classes in 4845 /// templates, which must be instantiated in the same scope as their 4846 /// enclosing function, so that they can reference function-local 4847 /// types, static variables, enumerators, etc. 4848 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 4849 4850 void PerformPendingInstantiations(bool LocalOnly = false); 4851 4852 TypeSourceInfo *SubstType(TypeSourceInfo *T, 4853 const MultiLevelTemplateArgumentList &TemplateArgs, 4854 SourceLocation Loc, DeclarationName Entity); 4855 4856 QualType SubstType(QualType T, 4857 const MultiLevelTemplateArgumentList &TemplateArgs, 4858 SourceLocation Loc, DeclarationName Entity); 4859 4860 TypeSourceInfo *SubstType(TypeLoc TL, 4861 const MultiLevelTemplateArgumentList &TemplateArgs, 4862 SourceLocation Loc, DeclarationName Entity); 4863 4864 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 4865 const MultiLevelTemplateArgumentList &TemplateArgs, 4866 SourceLocation Loc, 4867 DeclarationName Entity); 4868 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 4869 const MultiLevelTemplateArgumentList &TemplateArgs, 4870 int indexAdjustment, 4871 llvm::Optional<unsigned> NumExpansions); 4872 bool SubstParmTypes(SourceLocation Loc, 4873 ParmVarDecl **Params, unsigned NumParams, 4874 const MultiLevelTemplateArgumentList &TemplateArgs, 4875 SmallVectorImpl<QualType> &ParamTypes, 4876 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 4877 ExprResult SubstExpr(Expr *E, 4878 const MultiLevelTemplateArgumentList &TemplateArgs); 4879 4880 /// \brief Substitute the given template arguments into a list of 4881 /// expressions, expanding pack expansions if required. 4882 /// 4883 /// \param Exprs The list of expressions to substitute into. 4884 /// 4885 /// \param NumExprs The number of expressions in \p Exprs. 4886 /// 4887 /// \param IsCall Whether this is some form of call, in which case 4888 /// default arguments will be dropped. 4889 /// 4890 /// \param TemplateArgs The set of template arguments to substitute. 4891 /// 4892 /// \param Outputs Will receive all of the substituted arguments. 4893 /// 4894 /// \returns true if an error occurred, false otherwise. 4895 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 4896 const MultiLevelTemplateArgumentList &TemplateArgs, 4897 SmallVectorImpl<Expr *> &Outputs); 4898 4899 StmtResult SubstStmt(Stmt *S, 4900 const MultiLevelTemplateArgumentList &TemplateArgs); 4901 4902 Decl *SubstDecl(Decl *D, DeclContext *Owner, 4903 const MultiLevelTemplateArgumentList &TemplateArgs); 4904 4905 bool 4906 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 4907 CXXRecordDecl *Pattern, 4908 const MultiLevelTemplateArgumentList &TemplateArgs); 4909 4910 bool 4911 InstantiateClass(SourceLocation PointOfInstantiation, 4912 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 4913 const MultiLevelTemplateArgumentList &TemplateArgs, 4914 TemplateSpecializationKind TSK, 4915 bool Complain = true); 4916 4917 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 4918 const Decl *Pattern, Decl *Inst); 4919 4920 bool 4921 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 4922 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4923 TemplateSpecializationKind TSK, 4924 bool Complain = true); 4925 4926 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 4927 CXXRecordDecl *Instantiation, 4928 const MultiLevelTemplateArgumentList &TemplateArgs, 4929 TemplateSpecializationKind TSK); 4930 4931 void InstantiateClassTemplateSpecializationMembers( 4932 SourceLocation PointOfInstantiation, 4933 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4934 TemplateSpecializationKind TSK); 4935 4936 NestedNameSpecifierLoc 4937 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 4938 const MultiLevelTemplateArgumentList &TemplateArgs); 4939 4940 DeclarationNameInfo 4941 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 4942 const MultiLevelTemplateArgumentList &TemplateArgs); 4943 TemplateName 4944 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 4945 SourceLocation Loc, 4946 const MultiLevelTemplateArgumentList &TemplateArgs); 4947 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 4948 TemplateArgumentListInfo &Result, 4949 const MultiLevelTemplateArgumentList &TemplateArgs); 4950 4951 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 4952 FunctionDecl *Function, 4953 bool Recursive = false, 4954 bool DefinitionRequired = false); 4955 void InstantiateStaticDataMemberDefinition( 4956 SourceLocation PointOfInstantiation, 4957 VarDecl *Var, 4958 bool Recursive = false, 4959 bool DefinitionRequired = false); 4960 4961 void InstantiateMemInitializers(CXXConstructorDecl *New, 4962 const CXXConstructorDecl *Tmpl, 4963 const MultiLevelTemplateArgumentList &TemplateArgs); 4964 bool InstantiateInitializer(Expr *Init, 4965 const MultiLevelTemplateArgumentList &TemplateArgs, 4966 SourceLocation &LParenLoc, 4967 ASTOwningVector<Expr*> &NewArgs, 4968 SourceLocation &RParenLoc); 4969 4970 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 4971 const MultiLevelTemplateArgumentList &TemplateArgs); 4972 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 4973 const MultiLevelTemplateArgumentList &TemplateArgs); 4974 4975 // Objective-C declarations. 4976 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 4977 IdentifierInfo *ClassName, 4978 SourceLocation ClassLoc, 4979 IdentifierInfo *SuperName, 4980 SourceLocation SuperLoc, 4981 Decl * const *ProtoRefs, 4982 unsigned NumProtoRefs, 4983 const SourceLocation *ProtoLocs, 4984 SourceLocation EndProtoLoc, 4985 AttributeList *AttrList); 4986 4987 Decl *ActOnCompatiblityAlias( 4988 SourceLocation AtCompatibilityAliasLoc, 4989 IdentifierInfo *AliasName, SourceLocation AliasLocation, 4990 IdentifierInfo *ClassName, SourceLocation ClassLocation); 4991 4992 bool CheckForwardProtocolDeclarationForCircularDependency( 4993 IdentifierInfo *PName, 4994 SourceLocation &PLoc, SourceLocation PrevLoc, 4995 const ObjCList<ObjCProtocolDecl> &PList); 4996 4997 Decl *ActOnStartProtocolInterface( 4998 SourceLocation AtProtoInterfaceLoc, 4999 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 5000 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 5001 const SourceLocation *ProtoLocs, 5002 SourceLocation EndProtoLoc, 5003 AttributeList *AttrList); 5004 5005 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 5006 IdentifierInfo *ClassName, 5007 SourceLocation ClassLoc, 5008 IdentifierInfo *CategoryName, 5009 SourceLocation CategoryLoc, 5010 Decl * const *ProtoRefs, 5011 unsigned NumProtoRefs, 5012 const SourceLocation *ProtoLocs, 5013 SourceLocation EndProtoLoc); 5014 5015 Decl *ActOnStartClassImplementation( 5016 SourceLocation AtClassImplLoc, 5017 IdentifierInfo *ClassName, SourceLocation ClassLoc, 5018 IdentifierInfo *SuperClassname, 5019 SourceLocation SuperClassLoc); 5020 5021 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 5022 IdentifierInfo *ClassName, 5023 SourceLocation ClassLoc, 5024 IdentifierInfo *CatName, 5025 SourceLocation CatLoc); 5026 5027 Decl *ActOnForwardClassDeclaration(SourceLocation Loc, 5028 IdentifierInfo **IdentList, 5029 SourceLocation *IdentLocs, 5030 unsigned NumElts); 5031 5032 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 5033 const IdentifierLocPair *IdentList, 5034 unsigned NumElts, 5035 AttributeList *attrList); 5036 5037 void FindProtocolDeclaration(bool WarnOnDeclarations, 5038 const IdentifierLocPair *ProtocolId, 5039 unsigned NumProtocols, 5040 SmallVectorImpl<Decl *> &Protocols); 5041 5042 /// Ensure attributes are consistent with type. 5043 /// \param [in, out] Attributes The attributes to check; they will 5044 /// be modified to be consistent with \arg PropertyTy. 5045 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5046 SourceLocation Loc, 5047 unsigned &Attributes); 5048 5049 /// Process the specified property declaration and create decls for the 5050 /// setters and getters as needed. 5051 /// \param property The property declaration being processed 5052 /// \param DC The semantic container for the property 5053 /// \param redeclaredProperty Declaration for property if redeclared 5054 /// in class extension. 5055 /// \param lexicalDC Container for redeclaredProperty. 5056 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5057 ObjCContainerDecl *DC, 5058 ObjCPropertyDecl *redeclaredProperty = 0, 5059 ObjCContainerDecl *lexicalDC = 0); 5060 5061 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5062 ObjCPropertyDecl *SuperProperty, 5063 const IdentifierInfo *Name); 5064 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5065 5066 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5067 ObjCMethodDecl *MethodDecl, 5068 bool IsInstance); 5069 5070 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5071 5072 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5073 ObjCInterfaceDecl *ID); 5074 5075 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5076 ObjCProtocolDecl *PDecl); 5077 5078 void ActOnAtEnd(Scope *S, SourceRange AtEnd, Decl *classDecl, 5079 Decl **allMethods = 0, unsigned allNum = 0, 5080 Decl **allProperties = 0, unsigned pNum = 0, 5081 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5082 5083 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5084 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5085 Selector GetterSel, Selector SetterSel, 5086 Decl *ClassCategory, 5087 bool *OverridingProperty, 5088 tok::ObjCKeywordKind MethodImplKind, 5089 DeclContext *lexicalDC = 0); 5090 5091 Decl *ActOnPropertyImplDecl(Scope *S, 5092 SourceLocation AtLoc, 5093 SourceLocation PropertyLoc, 5094 bool ImplKind,Decl *ClassImplDecl, 5095 IdentifierInfo *PropertyId, 5096 IdentifierInfo *PropertyIvar, 5097 SourceLocation PropertyIvarLoc); 5098 5099 enum ObjCSpecialMethodKind { 5100 OSMK_None, 5101 OSMK_Alloc, 5102 OSMK_New, 5103 OSMK_Copy, 5104 OSMK_RetainingInit, 5105 OSMK_NonRetainingInit 5106 }; 5107 5108 struct ObjCArgInfo { 5109 IdentifierInfo *Name; 5110 SourceLocation NameLoc; 5111 // The Type is null if no type was specified, and the DeclSpec is invalid 5112 // in this case. 5113 ParsedType Type; 5114 ObjCDeclSpec DeclSpec; 5115 5116 /// ArgAttrs - Attribute list for this argument. 5117 AttributeList *ArgAttrs; 5118 }; 5119 5120 Decl *ActOnMethodDeclaration( 5121 Scope *S, 5122 SourceLocation BeginLoc, // location of the + or -. 5123 SourceLocation EndLoc, // location of the ; or {. 5124 tok::TokenKind MethodType, 5125 Decl *ClassDecl, ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5126 SourceLocation SelectorStartLoc, Selector Sel, 5127 // optional arguments. The number of types/arguments is obtained 5128 // from the Sel.getNumArgs(). 5129 ObjCArgInfo *ArgInfo, 5130 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5131 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5132 bool isVariadic, bool MethodDefinition); 5133 5134 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5135 // Will search "local" class/category implementations for a method decl. 5136 // Will also search in class's root looking for instance method. 5137 // Returns 0 if no method is found. 5138 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5139 ObjCInterfaceDecl *CDecl); 5140 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5141 ObjCInterfaceDecl *ClassDecl); 5142 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5143 const ObjCObjectPointerType *OPT, 5144 bool IsInstance); 5145 5146 bool inferObjCARCLifetime(ValueDecl *decl); 5147 5148 ExprResult 5149 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5150 Expr *BaseExpr, 5151 SourceLocation OpLoc, 5152 DeclarationName MemberName, 5153 SourceLocation MemberLoc, 5154 SourceLocation SuperLoc, QualType SuperType, 5155 bool Super); 5156 5157 ExprResult 5158 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5159 IdentifierInfo &propertyName, 5160 SourceLocation receiverNameLoc, 5161 SourceLocation propertyNameLoc); 5162 5163 ObjCMethodDecl *tryCaptureObjCSelf(); 5164 5165 /// \brief Describes the kind of message expression indicated by a message 5166 /// send that starts with an identifier. 5167 enum ObjCMessageKind { 5168 /// \brief The message is sent to 'super'. 5169 ObjCSuperMessage, 5170 /// \brief The message is an instance message. 5171 ObjCInstanceMessage, 5172 /// \brief The message is a class message, and the identifier is a type 5173 /// name. 5174 ObjCClassMessage 5175 }; 5176 5177 ObjCMessageKind getObjCMessageKind(Scope *S, 5178 IdentifierInfo *Name, 5179 SourceLocation NameLoc, 5180 bool IsSuper, 5181 bool HasTrailingDot, 5182 ParsedType &ReceiverType); 5183 5184 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5185 Selector Sel, 5186 SourceLocation LBracLoc, 5187 SourceLocation SelectorLoc, 5188 SourceLocation RBracLoc, 5189 MultiExprArg Args); 5190 5191 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5192 QualType ReceiverType, 5193 SourceLocation SuperLoc, 5194 Selector Sel, 5195 ObjCMethodDecl *Method, 5196 SourceLocation LBracLoc, 5197 SourceLocation SelectorLoc, 5198 SourceLocation RBracLoc, 5199 MultiExprArg Args); 5200 5201 ExprResult ActOnClassMessage(Scope *S, 5202 ParsedType Receiver, 5203 Selector Sel, 5204 SourceLocation LBracLoc, 5205 SourceLocation SelectorLoc, 5206 SourceLocation RBracLoc, 5207 MultiExprArg Args); 5208 5209 ExprResult BuildInstanceMessage(Expr *Receiver, 5210 QualType ReceiverType, 5211 SourceLocation SuperLoc, 5212 Selector Sel, 5213 ObjCMethodDecl *Method, 5214 SourceLocation LBracLoc, 5215 SourceLocation SelectorLoc, 5216 SourceLocation RBracLoc, 5217 MultiExprArg Args); 5218 5219 ExprResult ActOnInstanceMessage(Scope *S, 5220 Expr *Receiver, 5221 Selector Sel, 5222 SourceLocation LBracLoc, 5223 SourceLocation SelectorLoc, 5224 SourceLocation RBracLoc, 5225 MultiExprArg Args); 5226 5227 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5228 ObjCBridgeCastKind Kind, 5229 SourceLocation BridgeKeywordLoc, 5230 TypeSourceInfo *TSInfo, 5231 Expr *SubExpr); 5232 5233 ExprResult ActOnObjCBridgedCast(Scope *S, 5234 SourceLocation LParenLoc, 5235 ObjCBridgeCastKind Kind, 5236 SourceLocation BridgeKeywordLoc, 5237 ParsedType Type, 5238 SourceLocation RParenLoc, 5239 Expr *SubExpr); 5240 5241 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5242 5243 /// \brief Check whether the given new method is a valid override of the 5244 /// given overridden method, and set any properties that should be inherited. 5245 /// 5246 /// \returns True if an error occurred. 5247 bool CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5248 const ObjCMethodDecl *Overridden, 5249 bool IsImplementation); 5250 5251 /// \brief Check whether the given method overrides any methods in its class, 5252 /// calling \c CheckObjCMethodOverride for each overridden method. 5253 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5254 5255 enum PragmaOptionsAlignKind { 5256 POAK_Native, // #pragma options align=native 5257 POAK_Natural, // #pragma options align=natural 5258 POAK_Packed, // #pragma options align=packed 5259 POAK_Power, // #pragma options align=power 5260 POAK_Mac68k, // #pragma options align=mac68k 5261 POAK_Reset // #pragma options align=reset 5262 }; 5263 5264 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5265 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5266 SourceLocation PragmaLoc, 5267 SourceLocation KindLoc); 5268 5269 enum PragmaPackKind { 5270 PPK_Default, // #pragma pack([n]) 5271 PPK_Show, // #pragma pack(show), only supported by MSVC. 5272 PPK_Push, // #pragma pack(push, [identifier], [n]) 5273 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5274 }; 5275 5276 enum PragmaMSStructKind { 5277 PMSST_OFF, // #pragms ms_struct off 5278 PMSST_ON // #pragms ms_struct on 5279 }; 5280 5281 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5282 void ActOnPragmaPack(PragmaPackKind Kind, 5283 IdentifierInfo *Name, 5284 Expr *Alignment, 5285 SourceLocation PragmaLoc, 5286 SourceLocation LParenLoc, 5287 SourceLocation RParenLoc); 5288 5289 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5290 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5291 5292 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5293 void ActOnPragmaUnused(const Token &Identifier, 5294 Scope *curScope, 5295 SourceLocation PragmaLoc); 5296 5297 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5298 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 5299 SourceLocation PragmaLoc); 5300 5301 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II); 5302 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5303 5304 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5305 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5306 SourceLocation PragmaLoc, 5307 SourceLocation WeakNameLoc); 5308 5309 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5310 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5311 IdentifierInfo* AliasName, 5312 SourceLocation PragmaLoc, 5313 SourceLocation WeakNameLoc, 5314 SourceLocation AliasNameLoc); 5315 5316 /// ActOnPragmaFPContract - Called on well formed 5317 /// #pragma {STDC,OPENCL} FP_CONTRACT 5318 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5319 5320 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5321 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5322 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5323 5324 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5325 void AddMsStructLayoutForRecord(RecordDecl *RD); 5326 5327 /// FreePackedContext - Deallocate and null out PackContext. 5328 void FreePackedContext(); 5329 5330 /// PushNamespaceVisibilityAttr - Note that we've entered a 5331 /// namespace with a visibility attribute. 5332 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 5333 5334 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5335 /// add an appropriate visibility attribute. 5336 void AddPushedVisibilityAttribute(Decl *RD); 5337 5338 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5339 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5340 void PopPragmaVisibility(); 5341 5342 /// FreeVisContext - Deallocate and null out VisContext. 5343 void FreeVisContext(); 5344 5345 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5346 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, Expr *E); 5347 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, TypeSourceInfo *T); 5348 5349 /// CastCategory - Get the correct forwarded implicit cast result category 5350 /// from the inner expression. 5351 ExprValueKind CastCategory(Expr *E); 5352 5353 /// \brief The kind of conversion being performed. 5354 enum CheckedConversionKind { 5355 /// \brief An implicit conversion. 5356 CCK_ImplicitConversion, 5357 /// \brief A C-style cast. 5358 CCK_CStyleCast, 5359 /// \brief A functional-style cast. 5360 CCK_FunctionalCast, 5361 /// \brief A cast other than a C-style cast. 5362 CCK_OtherCast 5363 }; 5364 5365 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5366 /// cast. If there is already an implicit cast, merge into the existing one. 5367 /// If isLvalue, the result of the cast is an lvalue. 5368 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5369 ExprValueKind VK = VK_RValue, 5370 const CXXCastPath *BasePath = 0, 5371 CheckedConversionKind CCK 5372 = CCK_ImplicitConversion); 5373 5374 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5375 /// to the conversion from scalar type ScalarTy to the Boolean type. 5376 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5377 5378 /// IgnoredValueConversions - Given that an expression's result is 5379 /// syntactically ignored, perform any conversions that are 5380 /// required. 5381 ExprResult IgnoredValueConversions(Expr *E); 5382 5383 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5384 // functions and arrays to their respective pointers (C99 6.3.2.1). 5385 ExprResult UsualUnaryConversions(Expr *E); 5386 5387 // DefaultFunctionArrayConversion - converts functions and arrays 5388 // to their respective pointers (C99 6.3.2.1). 5389 ExprResult DefaultFunctionArrayConversion(Expr *E); 5390 5391 // DefaultFunctionArrayLvalueConversion - converts functions and 5392 // arrays to their respective pointers and performs the 5393 // lvalue-to-rvalue conversion. 5394 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5395 5396 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5397 // the operand. This is DefaultFunctionArrayLvalueConversion, 5398 // except that it assumes the operand isn't of function or array 5399 // type. 5400 ExprResult DefaultLvalueConversion(Expr *E); 5401 5402 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5403 // do not have a prototype. Integer promotions are performed on each 5404 // argument, and arguments that have type float are promoted to double. 5405 ExprResult DefaultArgumentPromotion(Expr *E); 5406 5407 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5408 enum VariadicCallType { 5409 VariadicFunction, 5410 VariadicBlock, 5411 VariadicMethod, 5412 VariadicConstructor, 5413 VariadicDoesNotApply 5414 }; 5415 5416 /// GatherArgumentsForCall - Collector argument expressions for various 5417 /// form of call prototypes. 5418 bool GatherArgumentsForCall(SourceLocation CallLoc, 5419 FunctionDecl *FDecl, 5420 const FunctionProtoType *Proto, 5421 unsigned FirstProtoArg, 5422 Expr **Args, unsigned NumArgs, 5423 SmallVector<Expr *, 8> &AllArgs, 5424 VariadicCallType CallType = VariadicDoesNotApply); 5425 5426 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5427 // will warn if the resulting type is not a POD type. 5428 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5429 FunctionDecl *FDecl); 5430 5431 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5432 // operands and then handles various conversions that are common to binary 5433 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5434 // routine returns the first non-arithmetic type found. The client is 5435 // responsible for emitting appropriate error diagnostics. 5436 QualType UsualArithmeticConversions(ExprResult &lExpr, ExprResult &rExpr, 5437 bool isCompAssign = false); 5438 5439 /// AssignConvertType - All of the 'assignment' semantic checks return this 5440 /// enum to indicate whether the assignment was allowed. These checks are 5441 /// done for simple assignments, as well as initialization, return from 5442 /// function, argument passing, etc. The query is phrased in terms of a 5443 /// source and destination type. 5444 enum AssignConvertType { 5445 /// Compatible - the types are compatible according to the standard. 5446 Compatible, 5447 5448 /// PointerToInt - The assignment converts a pointer to an int, which we 5449 /// accept as an extension. 5450 PointerToInt, 5451 5452 /// IntToPointer - The assignment converts an int to a pointer, which we 5453 /// accept as an extension. 5454 IntToPointer, 5455 5456 /// FunctionVoidPointer - The assignment is between a function pointer and 5457 /// void*, which the standard doesn't allow, but we accept as an extension. 5458 FunctionVoidPointer, 5459 5460 /// IncompatiblePointer - The assignment is between two pointers types that 5461 /// are not compatible, but we accept them as an extension. 5462 IncompatiblePointer, 5463 5464 /// IncompatiblePointer - The assignment is between two pointers types which 5465 /// point to integers which have a different sign, but are otherwise identical. 5466 /// This is a subset of the above, but broken out because it's by far the most 5467 /// common case of incompatible pointers. 5468 IncompatiblePointerSign, 5469 5470 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5471 /// c/v/r qualifiers, which we accept as an extension. 5472 CompatiblePointerDiscardsQualifiers, 5473 5474 /// IncompatiblePointerDiscardsQualifiers - The assignment 5475 /// discards qualifiers that we don't permit to be discarded, 5476 /// like address spaces. 5477 IncompatiblePointerDiscardsQualifiers, 5478 5479 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5480 /// nested pointer types, and the qualifiers other than the first two 5481 /// levels differ e.g. char ** -> const char **, but we accept them as an 5482 /// extension. 5483 IncompatibleNestedPointerQualifiers, 5484 5485 /// IncompatibleVectors - The assignment is between two vector types that 5486 /// have the same size, which we accept as an extension. 5487 IncompatibleVectors, 5488 5489 /// IntToBlockPointer - The assignment converts an int to a block 5490 /// pointer. We disallow this. 5491 IntToBlockPointer, 5492 5493 /// IncompatibleBlockPointer - The assignment is between two block 5494 /// pointers types that are not compatible. 5495 IncompatibleBlockPointer, 5496 5497 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5498 /// id type and something else (that is incompatible with it). For example, 5499 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5500 IncompatibleObjCQualifiedId, 5501 5502 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 5503 /// object with __weak qualifier. 5504 IncompatibleObjCWeakRef, 5505 5506 /// Incompatible - We reject this conversion outright, it is invalid to 5507 /// represent it in the AST. 5508 Incompatible 5509 }; 5510 5511 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5512 /// assignment conversion type specified by ConvTy. This returns true if the 5513 /// conversion was invalid or false if the conversion was accepted. 5514 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5515 SourceLocation Loc, 5516 QualType DstType, QualType SrcType, 5517 Expr *SrcExpr, AssignmentAction Action, 5518 bool *Complained = 0); 5519 5520 /// CheckAssignmentConstraints - Perform type checking for assignment, 5521 /// argument passing, variable initialization, and function return values. 5522 /// C99 6.5.16. 5523 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5524 QualType lhs, QualType rhs); 5525 5526 /// Check assignment constraints and prepare for a conversion of the 5527 /// RHS to the LHS type. 5528 AssignConvertType CheckAssignmentConstraints(QualType lhs, ExprResult &rhs, 5529 CastKind &Kind); 5530 5531 // CheckSingleAssignmentConstraints - Currently used by 5532 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5533 // this routine performs the default function/array converions. 5534 AssignConvertType CheckSingleAssignmentConstraints(QualType lhs, 5535 ExprResult &rExprRes); 5536 5537 // \brief If the lhs type is a transparent union, check whether we 5538 // can initialize the transparent union with the given expression. 5539 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType lhs, 5540 ExprResult &rExpr); 5541 5542 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5543 5544 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5545 5546 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5547 AssignmentAction Action, 5548 bool AllowExplicit = false); 5549 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5550 AssignmentAction Action, 5551 bool AllowExplicit, 5552 ImplicitConversionSequence& ICS); 5553 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5554 const ImplicitConversionSequence& ICS, 5555 AssignmentAction Action, 5556 CheckedConversionKind CCK 5557 = CCK_ImplicitConversion); 5558 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5559 const StandardConversionSequence& SCS, 5560 AssignmentAction Action, 5561 CheckedConversionKind CCK); 5562 5563 /// the following "Check" methods will return a valid/converted QualType 5564 /// or a null QualType (indicating an error diagnostic was issued). 5565 5566 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5567 QualType InvalidOperands(SourceLocation l, ExprResult &lex, ExprResult &rex); 5568 QualType CheckPointerToMemberOperands( // C++ 5.5 5569 ExprResult &lex, ExprResult &rex, ExprValueKind &VK, 5570 SourceLocation OpLoc, bool isIndirect); 5571 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5572 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign, 5573 bool isDivide); 5574 QualType CheckRemainderOperands( // C99 6.5.5 5575 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 5576 QualType CheckAdditionOperands( // C99 6.5.6 5577 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 5578 QualType CheckSubtractionOperands( // C99 6.5.6 5579 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 5580 QualType CheckShiftOperands( // C99 6.5.7 5581 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 5582 bool isCompAssign = false); 5583 QualType CheckCompareOperands( // C99 6.5.8/9 5584 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 5585 bool isRelational); 5586 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 5587 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 5588 QualType CheckLogicalOperands( // C99 6.5.[13,14] 5589 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc); 5590 // CheckAssignmentOperands is used for both simple and compound assignment. 5591 // For simple assignment, pass both expressions and a null converted type. 5592 // For compound assignment, pass both expressions and the converted type. 5593 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 5594 Expr *lex, ExprResult &rex, SourceLocation OpLoc, QualType convertedType); 5595 5596 void ConvertPropertyForLValue(ExprResult &LHS, ExprResult &RHS, QualType& LHSTy); 5597 ExprResult ConvertPropertyForRValue(Expr *E); 5598 5599 QualType CheckConditionalOperands( // C99 6.5.15 5600 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5601 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5602 QualType CXXCheckConditionalOperands( // C++ 5.16 5603 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5604 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5605 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 5606 bool *NonStandardCompositeType = 0); 5607 QualType FindCompositePointerType(SourceLocation Loc, ExprResult &E1, ExprResult &E2, 5608 bool *NonStandardCompositeType = 0) { 5609 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 5610 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, NonStandardCompositeType); 5611 E1 = Owned(E1Tmp); 5612 E2 = Owned(E2Tmp); 5613 return Composite; 5614 } 5615 5616 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5617 SourceLocation questionLoc); 5618 5619 bool DiagnoseConditionalForNull(Expr *LHS, Expr *RHS, 5620 SourceLocation QuestionLoc); 5621 5622 /// type checking for vector binary operators. 5623 QualType CheckVectorOperands(ExprResult &lex, ExprResult &rex, 5624 SourceLocation Loc, bool isCompAssign); 5625 QualType CheckVectorCompareOperands(ExprResult &lex, ExprResult &rx, 5626 SourceLocation l, bool isRel); 5627 5628 /// type checking declaration initializers (C99 6.7.8) 5629 bool CheckInitList(const InitializedEntity &Entity, 5630 InitListExpr *&InitList, QualType &DeclType); 5631 bool CheckForConstantInitializer(Expr *e, QualType t); 5632 5633 // type checking C++ declaration initializers (C++ [dcl.init]). 5634 5635 /// ReferenceCompareResult - Expresses the result of comparing two 5636 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5637 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5638 enum ReferenceCompareResult { 5639 /// Ref_Incompatible - The two types are incompatible, so direct 5640 /// reference binding is not possible. 5641 Ref_Incompatible = 0, 5642 /// Ref_Related - The two types are reference-related, which means 5643 /// that their unqualified forms (T1 and T2) are either the same 5644 /// or T1 is a base class of T2. 5645 Ref_Related, 5646 /// Ref_Compatible_With_Added_Qualification - The two types are 5647 /// reference-compatible with added qualification, meaning that 5648 /// they are reference-compatible and the qualifiers on T1 (cv1) 5649 /// are greater than the qualifiers on T2 (cv2). 5650 Ref_Compatible_With_Added_Qualification, 5651 /// Ref_Compatible - The two types are reference-compatible and 5652 /// have equivalent qualifiers (cv1 == cv2). 5653 Ref_Compatible 5654 }; 5655 5656 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 5657 QualType T1, QualType T2, 5658 bool &DerivedToBase, 5659 bool &ObjCConversion, 5660 bool &ObjCLifetimeConversion); 5661 5662 /// CheckCastTypes - Check type constraints for casting between types under 5663 /// C semantics, or forward to CXXCheckCStyleCast in C++. 5664 ExprResult CheckCastTypes(SourceLocation CastStartLoc, SourceRange TyRange, 5665 QualType CastTy, Expr *CastExpr, CastKind &Kind, 5666 ExprValueKind &VK, CXXCastPath &BasePath, 5667 bool FunctionalStyle = false); 5668 5669 ExprResult checkUnknownAnyCast(SourceRange TyRange, QualType castType, 5670 Expr *castExpr, CastKind &castKind, 5671 ExprValueKind &valueKind, CXXCastPath &BasePath); 5672 5673 // CheckVectorCast - check type constraints for vectors. 5674 // Since vectors are an extension, there are no C standard reference for this. 5675 // We allow casting between vectors and integer datatypes of the same size. 5676 // returns true if the cast is invalid 5677 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 5678 CastKind &Kind); 5679 5680 // CheckExtVectorCast - check type constraints for extended vectors. 5681 // Since vectors are an extension, there are no C standard reference for this. 5682 // We allow casting between vectors and integer datatypes of the same size, 5683 // or vectors and the element type of that vector. 5684 // returns the cast expr 5685 ExprResult CheckExtVectorCast(SourceRange R, QualType VectorTy, Expr *CastExpr, 5686 CastKind &Kind); 5687 5688 /// CXXCheckCStyleCast - Check constraints of a C-style or function-style 5689 /// cast under C++ semantics. 5690 ExprResult CXXCheckCStyleCast(SourceRange R, QualType CastTy, ExprValueKind &VK, 5691 Expr *CastExpr, CastKind &Kind, 5692 CXXCastPath &BasePath, bool FunctionalStyle); 5693 5694 /// \brief Checks for valid expressions which can be cast to an ObjC 5695 /// pointer without needing a bridge cast. 5696 bool ValidObjCARCNoBridgeCastExpr(Expr *&Exp, QualType castType); 5697 5698 /// \brief Checks for invalid conversions and casts between 5699 /// retainable pointers and other pointer kinds. 5700 void CheckObjCARCConversion(SourceRange castRange, QualType castType, 5701 Expr *&op, CheckedConversionKind CCK); 5702 5703 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 5704 QualType ExprType); 5705 5706 /// checkRetainCycles - Check whether an Objective-C message send 5707 /// might create an obvious retain cycle. 5708 void checkRetainCycles(ObjCMessageExpr *msg); 5709 void checkRetainCycles(Expr *receiver, Expr *argument); 5710 5711 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 5712 /// to weak/__unsafe_unretained type. 5713 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 5714 5715 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 5716 /// to weak/__unsafe_unretained expression. 5717 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 5718 5719 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 5720 /// \param Method - May be null. 5721 /// \param [out] ReturnType - The return type of the send. 5722 /// \return true iff there were any incompatible types. 5723 bool CheckMessageArgumentTypes(QualType ReceiverType, 5724 Expr **Args, unsigned NumArgs, Selector Sel, 5725 ObjCMethodDecl *Method, bool isClassMessage, 5726 bool isSuperMessage, 5727 SourceLocation lbrac, SourceLocation rbrac, 5728 QualType &ReturnType, ExprValueKind &VK); 5729 5730 /// \brief Determine the result of a message send expression based on 5731 /// the type of the receiver, the method expected to receive the message, 5732 /// and the form of the message send. 5733 QualType getMessageSendResultType(QualType ReceiverType, 5734 ObjCMethodDecl *Method, 5735 bool isClassMessage, bool isSuperMessage); 5736 5737 /// \brief If the given expression involves a message send to a method 5738 /// with a related result type, emit a note describing what happened. 5739 void EmitRelatedResultTypeNote(const Expr *E); 5740 5741 /// CheckBooleanCondition - Diagnose problems involving the use of 5742 /// the given expression as a boolean condition (e.g. in an if 5743 /// statement). Also performs the standard function and array 5744 /// decays, possibly changing the input variable. 5745 /// 5746 /// \param Loc - A location associated with the condition, e.g. the 5747 /// 'if' keyword. 5748 /// \return true iff there were any errors 5749 ExprResult CheckBooleanCondition(Expr *CondExpr, SourceLocation Loc); 5750 5751 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 5752 Expr *SubExpr); 5753 5754 /// DiagnoseAssignmentAsCondition - Given that an expression is 5755 /// being used as a boolean condition, warn if it's an assignment. 5756 void DiagnoseAssignmentAsCondition(Expr *E); 5757 5758 /// \brief Redundant parentheses over an equality comparison can indicate 5759 /// that the user intended an assignment used as condition. 5760 void DiagnoseEqualityWithExtraParens(ParenExpr *parenE); 5761 5762 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 5763 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 5764 5765 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 5766 /// the specified width and sign. If an overflow occurs, detect it and emit 5767 /// the specified diagnostic. 5768 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 5769 unsigned NewWidth, bool NewSign, 5770 SourceLocation Loc, unsigned DiagID); 5771 5772 /// Checks that the Objective-C declaration is declared in the global scope. 5773 /// Emits an error and marks the declaration as invalid if it's not declared 5774 /// in the global scope. 5775 bool CheckObjCDeclScope(Decl *D); 5776 5777 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 5778 /// and reports the appropriate diagnostics. Returns false on success. 5779 /// Can optionally return the value of the expression. 5780 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 5781 5782 /// VerifyBitField - verifies that a bit field expression is an ICE and has 5783 /// the correct width, and that the field type is valid. 5784 /// Returns false on success. 5785 /// Can optionally return whether the bit-field is of width 0 5786 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 5787 QualType FieldTy, const Expr *BitWidth, 5788 bool *ZeroWidth = 0); 5789 5790 /// \name Code completion 5791 //@{ 5792 /// \brief Describes the context in which code completion occurs. 5793 enum ParserCompletionContext { 5794 /// \brief Code completion occurs at top-level or namespace context. 5795 PCC_Namespace, 5796 /// \brief Code completion occurs within a class, struct, or union. 5797 PCC_Class, 5798 /// \brief Code completion occurs within an Objective-C interface, protocol, 5799 /// or category. 5800 PCC_ObjCInterface, 5801 /// \brief Code completion occurs within an Objective-C implementation or 5802 /// category implementation 5803 PCC_ObjCImplementation, 5804 /// \brief Code completion occurs within the list of instance variables 5805 /// in an Objective-C interface, protocol, category, or implementation. 5806 PCC_ObjCInstanceVariableList, 5807 /// \brief Code completion occurs following one or more template 5808 /// headers. 5809 PCC_Template, 5810 /// \brief Code completion occurs following one or more template 5811 /// headers within a class. 5812 PCC_MemberTemplate, 5813 /// \brief Code completion occurs within an expression. 5814 PCC_Expression, 5815 /// \brief Code completion occurs within a statement, which may 5816 /// also be an expression or a declaration. 5817 PCC_Statement, 5818 /// \brief Code completion occurs at the beginning of the 5819 /// initialization statement (or expression) in a for loop. 5820 PCC_ForInit, 5821 /// \brief Code completion occurs within the condition of an if, 5822 /// while, switch, or for statement. 5823 PCC_Condition, 5824 /// \brief Code completion occurs within the body of a function on a 5825 /// recovery path, where we do not have a specific handle on our position 5826 /// in the grammar. 5827 PCC_RecoveryInFunction, 5828 /// \brief Code completion occurs where only a type is permitted. 5829 PCC_Type, 5830 /// \brief Code completion occurs in a parenthesized expression, which 5831 /// might also be a type cast. 5832 PCC_ParenthesizedExpression, 5833 /// \brief Code completion occurs within a sequence of declaration 5834 /// specifiers within a function, method, or block. 5835 PCC_LocalDeclarationSpecifiers 5836 }; 5837 5838 void CodeCompleteOrdinaryName(Scope *S, 5839 ParserCompletionContext CompletionContext); 5840 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 5841 bool AllowNonIdentifiers, 5842 bool AllowNestedNameSpecifiers); 5843 5844 struct CodeCompleteExpressionData; 5845 void CodeCompleteExpression(Scope *S, 5846 const CodeCompleteExpressionData &Data); 5847 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 5848 SourceLocation OpLoc, 5849 bool IsArrow); 5850 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 5851 void CodeCompleteTag(Scope *S, unsigned TagSpec); 5852 void CodeCompleteTypeQualifiers(DeclSpec &DS); 5853 void CodeCompleteCase(Scope *S); 5854 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 5855 void CodeCompleteInitializer(Scope *S, Decl *D); 5856 void CodeCompleteReturn(Scope *S); 5857 void CodeCompleteAfterIf(Scope *S); 5858 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 5859 5860 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 5861 bool EnteringContext); 5862 void CodeCompleteUsing(Scope *S); 5863 void CodeCompleteUsingDirective(Scope *S); 5864 void CodeCompleteNamespaceDecl(Scope *S); 5865 void CodeCompleteNamespaceAliasDecl(Scope *S); 5866 void CodeCompleteOperatorName(Scope *S); 5867 void CodeCompleteConstructorInitializer(Decl *Constructor, 5868 CXXCtorInitializer** Initializers, 5869 unsigned NumInitializers); 5870 5871 void CodeCompleteObjCAtDirective(Scope *S, Decl *ObjCImpDecl, 5872 bool InInterface); 5873 void CodeCompleteObjCAtVisibility(Scope *S); 5874 void CodeCompleteObjCAtStatement(Scope *S); 5875 void CodeCompleteObjCAtExpression(Scope *S); 5876 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 5877 void CodeCompleteObjCPropertyGetter(Scope *S, Decl *ClassDecl); 5878 void CodeCompleteObjCPropertySetter(Scope *S, Decl *ClassDecl); 5879 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 5880 bool IsParameter); 5881 void CodeCompleteObjCMessageReceiver(Scope *S); 5882 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 5883 IdentifierInfo **SelIdents, 5884 unsigned NumSelIdents, 5885 bool AtArgumentExpression); 5886 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 5887 IdentifierInfo **SelIdents, 5888 unsigned NumSelIdents, 5889 bool AtArgumentExpression, 5890 bool IsSuper = false); 5891 void CodeCompleteObjCInstanceMessage(Scope *S, ExprTy *Receiver, 5892 IdentifierInfo **SelIdents, 5893 unsigned NumSelIdents, 5894 bool AtArgumentExpression, 5895 ObjCInterfaceDecl *Super = 0); 5896 void CodeCompleteObjCForCollection(Scope *S, 5897 DeclGroupPtrTy IterationVar); 5898 void CodeCompleteObjCSelector(Scope *S, 5899 IdentifierInfo **SelIdents, 5900 unsigned NumSelIdents); 5901 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 5902 unsigned NumProtocols); 5903 void CodeCompleteObjCProtocolDecl(Scope *S); 5904 void CodeCompleteObjCInterfaceDecl(Scope *S); 5905 void CodeCompleteObjCSuperclass(Scope *S, 5906 IdentifierInfo *ClassName, 5907 SourceLocation ClassNameLoc); 5908 void CodeCompleteObjCImplementationDecl(Scope *S); 5909 void CodeCompleteObjCInterfaceCategory(Scope *S, 5910 IdentifierInfo *ClassName, 5911 SourceLocation ClassNameLoc); 5912 void CodeCompleteObjCImplementationCategory(Scope *S, 5913 IdentifierInfo *ClassName, 5914 SourceLocation ClassNameLoc); 5915 void CodeCompleteObjCPropertyDefinition(Scope *S, Decl *ObjCImpDecl); 5916 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 5917 IdentifierInfo *PropertyName, 5918 Decl *ObjCImpDecl); 5919 void CodeCompleteObjCMethodDecl(Scope *S, 5920 bool IsInstanceMethod, 5921 ParsedType ReturnType, 5922 Decl *IDecl); 5923 void CodeCompleteObjCMethodDeclSelector(Scope *S, 5924 bool IsInstanceMethod, 5925 bool AtParameterName, 5926 ParsedType ReturnType, 5927 IdentifierInfo **SelIdents, 5928 unsigned NumSelIdents); 5929 void CodeCompletePreprocessorDirective(bool InConditional); 5930 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 5931 void CodeCompletePreprocessorMacroName(bool IsDefinition); 5932 void CodeCompletePreprocessorExpression(); 5933 void CodeCompletePreprocessorMacroArgument(Scope *S, 5934 IdentifierInfo *Macro, 5935 MacroInfo *MacroInfo, 5936 unsigned Argument); 5937 void CodeCompleteNaturalLanguage(); 5938 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 5939 SmallVectorImpl<CodeCompletionResult> &Results); 5940 //@} 5941 5942 //===--------------------------------------------------------------------===// 5943 // Extra semantic analysis beyond the C type system 5944 5945public: 5946 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 5947 unsigned ByteNo) const; 5948 5949private: 5950 void CheckArrayAccess(const Expr *E); 5951 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 5952 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 5953 5954 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 5955 bool CheckObjCString(Expr *Arg); 5956 5957 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5958 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5959 5960 bool SemaBuiltinVAStart(CallExpr *TheCall); 5961 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 5962 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 5963 5964public: 5965 // Used by C++ template instantiation. 5966 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 5967 5968private: 5969 bool SemaBuiltinPrefetch(CallExpr *TheCall); 5970 bool SemaBuiltinObjectSize(CallExpr *TheCall); 5971 bool SemaBuiltinLongjmp(CallExpr *TheCall); 5972 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 5973 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 5974 llvm::APSInt &Result); 5975 5976 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 5977 bool HasVAListArg, unsigned format_idx, 5978 unsigned firstDataArg, bool isPrintf); 5979 5980 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 5981 const CallExpr *TheCall, bool HasVAListArg, 5982 unsigned format_idx, unsigned firstDataArg, 5983 bool isPrintf); 5984 5985 void CheckNonNullArguments(const NonNullAttr *NonNull, 5986 const Expr * const *ExprArgs, 5987 SourceLocation CallSiteLoc); 5988 5989 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 5990 unsigned format_idx, unsigned firstDataArg, 5991 bool isPrintf); 5992 5993 /// \brief Enumeration used to describe which of the memory setting or copying 5994 /// functions is being checked by \c CheckMemsetcpymoveArguments(). 5995 enum CheckedMemoryFunction { 5996 CMF_Memset, 5997 CMF_Memcpy, 5998 CMF_Memmove 5999 }; 6000 6001 void CheckMemsetcpymoveArguments(const CallExpr *Call, 6002 CheckedMemoryFunction CMF, 6003 IdentifierInfo *FnName); 6004 6005 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 6006 SourceLocation ReturnLoc); 6007 void CheckFloatComparison(SourceLocation loc, Expr* lex, Expr* rex); 6008 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 6009 6010 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 6011 Expr *Init); 6012 6013 /// \brief The parser's current scope. 6014 /// 6015 /// The parser maintains this state here. 6016 Scope *CurScope; 6017 6018protected: 6019 friend class Parser; 6020 friend class InitializationSequence; 6021 friend class ASTReader; 6022 friend class ASTWriter; 6023 6024public: 6025 /// \brief Retrieve the parser's current scope. 6026 /// 6027 /// This routine must only be used when it is certain that semantic analysis 6028 /// and the parser are in precisely the same context, which is not the case 6029 /// when, e.g., we are performing any kind of template instantiation. 6030 /// Therefore, the only safe places to use this scope are in the parser 6031 /// itself and in routines directly invoked from the parser and *never* from 6032 /// template substitution or instantiation. 6033 Scope *getCurScope() const { return CurScope; } 6034}; 6035 6036/// \brief RAII object that enters a new expression evaluation context. 6037class EnterExpressionEvaluationContext { 6038 Sema &Actions; 6039 6040public: 6041 EnterExpressionEvaluationContext(Sema &Actions, 6042 Sema::ExpressionEvaluationContext NewContext) 6043 : Actions(Actions) { 6044 Actions.PushExpressionEvaluationContext(NewContext); 6045 } 6046 6047 ~EnterExpressionEvaluationContext() { 6048 Actions.PopExpressionEvaluationContext(); 6049 } 6050}; 6051 6052} // end namespace clang 6053 6054#endif 6055