Sema.h revision d58a0a55e64a7c410a80e9d6dcd899e61e99cc4d
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/AST/Expr.h" 27#include "clang/AST/DeclarationName.h" 28#include "clang/AST/ExternalASTSource.h" 29#include "clang/AST/TypeLoc.h" 30#include "clang/Basic/Specifiers.h" 31#include "clang/Basic/TemplateKinds.h" 32#include "clang/Basic/TypeTraits.h" 33#include "clang/Basic/ExpressionTraits.h" 34#include "llvm/ADT/OwningPtr.h" 35#include "llvm/ADT/SmallPtrSet.h" 36#include "llvm/ADT/SmallVector.h" 37#include <deque> 38#include <string> 39 40namespace llvm { 41 class APSInt; 42 template <typename ValueT> struct DenseMapInfo; 43 template <typename ValueT, typename ValueInfoT> class DenseSet; 44} 45 46namespace clang { 47 class ADLResult; 48 class ASTConsumer; 49 class ASTContext; 50 class ASTMutationListener; 51 class ASTReader; 52 class ASTWriter; 53 class ArrayType; 54 class AttributeList; 55 class BlockDecl; 56 class CXXBasePath; 57 class CXXBasePaths; 58 typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 59 class CXXConstructorDecl; 60 class CXXConversionDecl; 61 class CXXDestructorDecl; 62 class CXXFieldCollector; 63 class CXXMemberCallExpr; 64 class CXXMethodDecl; 65 class CXXScopeSpec; 66 class CXXTemporary; 67 class CXXTryStmt; 68 class CallExpr; 69 class ClassTemplateDecl; 70 class ClassTemplatePartialSpecializationDecl; 71 class ClassTemplateSpecializationDecl; 72 class CodeCompleteConsumer; 73 class CodeCompletionAllocator; 74 class CodeCompletionResult; 75 class Decl; 76 class DeclAccessPair; 77 class DeclContext; 78 class DeclRefExpr; 79 class DeclaratorDecl; 80 class DeducedTemplateArgument; 81 class DependentDiagnostic; 82 class DesignatedInitExpr; 83 class Designation; 84 class EnumConstantDecl; 85 class Expr; 86 class ExtVectorType; 87 class ExternalSemaSource; 88 class FormatAttr; 89 class FriendDecl; 90 class FunctionDecl; 91 class FunctionProtoType; 92 class FunctionTemplateDecl; 93 class ImplicitConversionSequence; 94 class InitListExpr; 95 class InitializationKind; 96 class InitializationSequence; 97 class InitializedEntity; 98 class IntegerLiteral; 99 class LabelStmt; 100 class LangOptions; 101 class LocalInstantiationScope; 102 class LookupResult; 103 class MacroInfo; 104 class MultiLevelTemplateArgumentList; 105 class NamedDecl; 106 class NonNullAttr; 107 class ObjCCategoryDecl; 108 class ObjCCategoryImplDecl; 109 class ObjCCompatibleAliasDecl; 110 class ObjCContainerDecl; 111 class ObjCImplDecl; 112 class ObjCImplementationDecl; 113 class ObjCInterfaceDecl; 114 class ObjCIvarDecl; 115 template <class T> class ObjCList; 116 class ObjCMessageExpr; 117 class ObjCMethodDecl; 118 class ObjCPropertyDecl; 119 class ObjCProtocolDecl; 120 class OverloadCandidateSet; 121 class OverloadExpr; 122 class ParenListExpr; 123 class ParmVarDecl; 124 class Preprocessor; 125 class PseudoDestructorTypeStorage; 126 class QualType; 127 class StandardConversionSequence; 128 class Stmt; 129 class StringLiteral; 130 class SwitchStmt; 131 class TargetAttributesSema; 132 class TemplateArgument; 133 class TemplateArgumentList; 134 class TemplateArgumentLoc; 135 class TemplateDecl; 136 class TemplateParameterList; 137 class TemplatePartialOrderingContext; 138 class TemplateTemplateParmDecl; 139 class Token; 140 class TypeAliasDecl; 141 class TypedefDecl; 142 class TypedefNameDecl; 143 class TypeLoc; 144 class UnqualifiedId; 145 class UnresolvedLookupExpr; 146 class UnresolvedMemberExpr; 147 class UnresolvedSetImpl; 148 class UnresolvedSetIterator; 149 class UsingDecl; 150 class UsingShadowDecl; 151 class ValueDecl; 152 class VarDecl; 153 class VisibilityAttr; 154 class VisibleDeclConsumer; 155 class IndirectFieldDecl; 156 157namespace sema { 158 class AccessedEntity; 159 class BlockScopeInfo; 160 class DelayedDiagnostic; 161 class FunctionScopeInfo; 162 class TemplateDeductionInfo; 163} 164 165// FIXME: No way to easily map from TemplateTypeParmTypes to 166// TemplateTypeParmDecls, so we have this horrible PointerUnion. 167typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 168 SourceLocation> UnexpandedParameterPack; 169 170/// Sema - This implements semantic analysis and AST building for C. 171class Sema { 172 Sema(const Sema&); // DO NOT IMPLEMENT 173 void operator=(const Sema&); // DO NOT IMPLEMENT 174 mutable const TargetAttributesSema* TheTargetAttributesSema; 175public: 176 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 177 typedef OpaquePtr<TemplateName> TemplateTy; 178 typedef OpaquePtr<QualType> TypeTy; 179 typedef Attr AttrTy; 180 typedef CXXBaseSpecifier BaseTy; 181 typedef CXXCtorInitializer MemInitTy; 182 typedef Expr ExprTy; 183 typedef Stmt StmtTy; 184 typedef TemplateParameterList TemplateParamsTy; 185 typedef NestedNameSpecifier CXXScopeTy; 186 187 OpenCLOptions OpenCLFeatures; 188 FPOptions FPFeatures; 189 190 const LangOptions &LangOpts; 191 Preprocessor &PP; 192 ASTContext &Context; 193 ASTConsumer &Consumer; 194 Diagnostic &Diags; 195 SourceManager &SourceMgr; 196 197 /// \brief Flag indicating whether or not to collect detailed statistics. 198 bool CollectStats; 199 200 /// \brief Source of additional semantic information. 201 ExternalSemaSource *ExternalSource; 202 203 /// \brief Code-completion consumer. 204 CodeCompleteConsumer *CodeCompleter; 205 206 /// CurContext - This is the current declaration context of parsing. 207 DeclContext *CurContext; 208 209 /// VAListTagName - The declaration name corresponding to __va_list_tag. 210 /// This is used as part of a hack to omit that class from ADL results. 211 DeclarationName VAListTagName; 212 213 /// PackContext - Manages the stack for #pragma pack. An alignment 214 /// of 0 indicates default alignment. 215 void *PackContext; // Really a "PragmaPackStack*" 216 217 bool MSStructPragmaOn; // True when #pragma ms_struct on 218 219 /// VisContext - Manages the stack for #pragma GCC visibility. 220 void *VisContext; // Really a "PragmaVisStack*" 221 222 /// ExprNeedsCleanups - True if the current evaluation context 223 /// requires cleanups to be run at its conclusion. 224 bool ExprNeedsCleanups; 225 226 /// \brief Stack containing information about each of the nested 227 /// function, block, and method scopes that are currently active. 228 /// 229 /// This array is never empty. Clients should ignore the first 230 /// element, which is used to cache a single FunctionScopeInfo 231 /// that's used to parse every top-level function. 232 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 233 234 /// ExprTemporaries - This is the stack of temporaries that are created by 235 /// the current full expression. 236 SmallVector<CXXTemporary*, 8> ExprTemporaries; 237 238 typedef LazyVector<TypedefNameDecl *, ExternalSemaSource, 239 &ExternalSemaSource::ReadExtVectorDecls, 2, 2> 240 ExtVectorDeclsType; 241 242 /// ExtVectorDecls - This is a list all the extended vector types. This allows 243 /// us to associate a raw vector type with one of the ext_vector type names. 244 /// This is only necessary for issuing pretty diagnostics. 245 ExtVectorDeclsType ExtVectorDecls; 246 247 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 248 llvm::OwningPtr<CXXFieldCollector> FieldCollector; 249 250 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 251 252 /// PureVirtualClassDiagSet - a set of class declarations which we have 253 /// emitted a list of pure virtual functions. Used to prevent emitting the 254 /// same list more than once. 255 llvm::OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 256 257 /// ParsingInitForAutoVars - a set of declarations with auto types for which 258 /// we are currently parsing the initializer. 259 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 260 261 /// \brief A mapping from external names to the most recent 262 /// locally-scoped external declaration with that name. 263 /// 264 /// This map contains external declarations introduced in local 265 /// scoped, e.g., 266 /// 267 /// \code 268 /// void f() { 269 /// void foo(int, int); 270 /// } 271 /// \endcode 272 /// 273 /// Here, the name "foo" will be associated with the declaration on 274 /// "foo" within f. This name is not visible outside of 275 /// "f". However, we still find it in two cases: 276 /// 277 /// - If we are declaring another external with the name "foo", we 278 /// can find "foo" as a previous declaration, so that the types 279 /// of this external declaration can be checked for 280 /// compatibility. 281 /// 282 /// - If we would implicitly declare "foo" (e.g., due to a call to 283 /// "foo" in C when no prototype or definition is visible), then 284 /// we find this declaration of "foo" and complain that it is 285 /// not visible. 286 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 287 288 typedef LazyVector<VarDecl *, ExternalSemaSource, 289 &ExternalSemaSource::ReadTentativeDefinitions, 2, 2> 290 TentativeDefinitionsType; 291 292 /// \brief All the tentative definitions encountered in the TU. 293 TentativeDefinitionsType TentativeDefinitions; 294 295 typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource, 296 &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2> 297 UnusedFileScopedDeclsType; 298 299 /// \brief The set of file scoped decls seen so far that have not been used 300 /// and must warn if not used. Only contains the first declaration. 301 UnusedFileScopedDeclsType UnusedFileScopedDecls; 302 303 typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource, 304 &ExternalSemaSource::ReadDelegatingConstructors, 2, 2> 305 DelegatingCtorDeclsType; 306 307 /// \brief All the delegating constructors seen so far in the file, used for 308 /// cycle detection at the end of the TU. 309 DelegatingCtorDeclsType DelegatingCtorDecls; 310 311 /// \brief All the overriding destructors seen during a class definition 312 /// (there could be multiple due to nested classes) that had their exception 313 /// spec checks delayed, plus the overridden destructor. 314 SmallVector<std::pair<const CXXDestructorDecl*, 315 const CXXDestructorDecl*>, 2> 316 DelayedDestructorExceptionSpecChecks; 317 318 /// \brief Callback to the parser to parse templated functions when needed. 319 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 320 LateTemplateParserCB *LateTemplateParser; 321 void *OpaqueParser; 322 323 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 324 LateTemplateParser = LTP; 325 OpaqueParser = P; 326 } 327 328 class DelayedDiagnostics; 329 330 class ParsingDeclState { 331 unsigned SavedStackSize; 332 friend class Sema::DelayedDiagnostics; 333 }; 334 335 class ProcessingContextState { 336 unsigned SavedParsingDepth; 337 unsigned SavedActiveStackBase; 338 friend class Sema::DelayedDiagnostics; 339 }; 340 341 /// A class which encapsulates the logic for delaying diagnostics 342 /// during parsing and other processing. 343 class DelayedDiagnostics { 344 /// \brief The stack of diagnostics that were delayed due to being 345 /// produced during the parsing of a declaration. 346 sema::DelayedDiagnostic *Stack; 347 348 /// \brief The number of objects on the delayed-diagnostics stack. 349 unsigned StackSize; 350 351 /// \brief The current capacity of the delayed-diagnostics stack. 352 unsigned StackCapacity; 353 354 /// \brief The index of the first "active" delayed diagnostic in 355 /// the stack. When parsing class definitions, we ignore active 356 /// delayed diagnostics from the surrounding context. 357 unsigned ActiveStackBase; 358 359 /// \brief The depth of the declarations we're currently parsing. 360 /// This gets saved and reset whenever we enter a class definition. 361 unsigned ParsingDepth; 362 363 public: 364 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 365 ActiveStackBase(0), ParsingDepth(0) {} 366 367 ~DelayedDiagnostics() { 368 delete[] reinterpret_cast<char*>(Stack); 369 } 370 371 /// Adds a delayed diagnostic. 372 void add(const sema::DelayedDiagnostic &diag); 373 374 /// Determines whether diagnostics should be delayed. 375 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 376 377 /// Observe that we've started parsing a declaration. Access and 378 /// deprecation diagnostics will be delayed; when the declaration 379 /// is completed, all active delayed diagnostics will be evaluated 380 /// in its context, and then active diagnostics stack will be 381 /// popped down to the saved depth. 382 ParsingDeclState pushParsingDecl() { 383 ParsingDepth++; 384 385 ParsingDeclState state; 386 state.SavedStackSize = StackSize; 387 return state; 388 } 389 390 /// Observe that we're completed parsing a declaration. 391 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 392 393 /// Observe that we've started processing a different context, the 394 /// contents of which are semantically separate from the 395 /// declarations it may lexically appear in. This sets aside the 396 /// current stack of active diagnostics and starts afresh. 397 ProcessingContextState pushContext() { 398 assert(StackSize >= ActiveStackBase); 399 400 ProcessingContextState state; 401 state.SavedParsingDepth = ParsingDepth; 402 state.SavedActiveStackBase = ActiveStackBase; 403 404 ActiveStackBase = StackSize; 405 ParsingDepth = 0; 406 407 return state; 408 } 409 410 /// Observe that we've stopped processing a context. This 411 /// restores the previous stack of active diagnostics. 412 void popContext(ProcessingContextState state) { 413 assert(ActiveStackBase == StackSize); 414 assert(ParsingDepth == 0); 415 ActiveStackBase = state.SavedActiveStackBase; 416 ParsingDepth = state.SavedParsingDepth; 417 } 418 } DelayedDiagnostics; 419 420 /// A RAII object to temporarily push a declaration context. 421 class ContextRAII { 422 private: 423 Sema &S; 424 DeclContext *SavedContext; 425 ProcessingContextState SavedContextState; 426 427 public: 428 ContextRAII(Sema &S, DeclContext *ContextToPush) 429 : S(S), SavedContext(S.CurContext), 430 SavedContextState(S.DelayedDiagnostics.pushContext()) 431 { 432 assert(ContextToPush && "pushing null context"); 433 S.CurContext = ContextToPush; 434 } 435 436 void pop() { 437 if (!SavedContext) return; 438 S.CurContext = SavedContext; 439 S.DelayedDiagnostics.popContext(SavedContextState); 440 SavedContext = 0; 441 } 442 443 ~ContextRAII() { 444 pop(); 445 } 446 }; 447 448 /// WeakUndeclaredIdentifiers - Identifiers contained in 449 /// #pragma weak before declared. rare. may alias another 450 /// identifier, declared or undeclared 451 class WeakInfo { 452 IdentifierInfo *alias; // alias (optional) 453 SourceLocation loc; // for diagnostics 454 bool used; // identifier later declared? 455 public: 456 WeakInfo() 457 : alias(0), loc(SourceLocation()), used(false) {} 458 WeakInfo(IdentifierInfo *Alias, SourceLocation Loc) 459 : alias(Alias), loc(Loc), used(false) {} 460 inline IdentifierInfo * getAlias() const { return alias; } 461 inline SourceLocation getLocation() const { return loc; } 462 void setUsed(bool Used=true) { used = Used; } 463 inline bool getUsed() { return used; } 464 bool operator==(WeakInfo RHS) const { 465 return alias == RHS.getAlias() && loc == RHS.getLocation(); 466 } 467 bool operator!=(WeakInfo RHS) const { return !(*this == RHS); } 468 }; 469 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 470 471 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 472 /// #pragma weak during processing of other Decls. 473 /// I couldn't figure out a clean way to generate these in-line, so 474 /// we store them here and handle separately -- which is a hack. 475 /// It would be best to refactor this. 476 SmallVector<Decl*,2> WeakTopLevelDecl; 477 478 IdentifierResolver IdResolver; 479 480 /// Translation Unit Scope - useful to Objective-C actions that need 481 /// to lookup file scope declarations in the "ordinary" C decl namespace. 482 /// For example, user-defined classes, built-in "id" type, etc. 483 Scope *TUScope; 484 485 /// \brief The C++ "std" namespace, where the standard library resides. 486 LazyDeclPtr StdNamespace; 487 488 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 489 /// standard library. 490 LazyDeclPtr StdBadAlloc; 491 492 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 493 RecordDecl *CXXTypeInfoDecl; 494 495 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 496 RecordDecl *MSVCGuidDecl; 497 498 /// A flag to remember whether the implicit forms of operator new and delete 499 /// have been declared. 500 bool GlobalNewDeleteDeclared; 501 502 /// \brief The set of declarations that have been referenced within 503 /// a potentially evaluated expression. 504 typedef SmallVector<std::pair<SourceLocation, Decl *>, 10> 505 PotentiallyReferencedDecls; 506 507 /// \brief A set of diagnostics that may be emitted. 508 typedef SmallVector<std::pair<SourceLocation, PartialDiagnostic>, 10> 509 PotentiallyEmittedDiagnostics; 510 511 /// \brief Describes how the expressions currently being parsed are 512 /// evaluated at run-time, if at all. 513 enum ExpressionEvaluationContext { 514 /// \brief The current expression and its subexpressions occur within an 515 /// unevaluated operand (C++0x [expr]p8), such as a constant expression 516 /// or the subexpression of \c sizeof, where the type or the value of the 517 /// expression may be significant but no code will be generated to evaluate 518 /// the value of the expression at run time. 519 Unevaluated, 520 521 /// \brief The current expression is potentially evaluated at run time, 522 /// which means that code may be generated to evaluate the value of the 523 /// expression at run time. 524 PotentiallyEvaluated, 525 526 /// \brief The current expression may be potentially evaluated or it may 527 /// be unevaluated, but it is impossible to tell from the lexical context. 528 /// This evaluation context is used primary for the operand of the C++ 529 /// \c typeid expression, whose argument is potentially evaluated only when 530 /// it is an lvalue of polymorphic class type (C++ [basic.def.odr]p2). 531 PotentiallyPotentiallyEvaluated, 532 533 /// \brief The current expression is potentially evaluated, but any 534 /// declarations referenced inside that expression are only used if 535 /// in fact the current expression is used. 536 /// 537 /// This value is used when parsing default function arguments, for which 538 /// we would like to provide diagnostics (e.g., passing non-POD arguments 539 /// through varargs) but do not want to mark declarations as "referenced" 540 /// until the default argument is used. 541 PotentiallyEvaluatedIfUsed 542 }; 543 544 /// \brief Data structure used to record current or nested 545 /// expression evaluation contexts. 546 struct ExpressionEvaluationContextRecord { 547 /// \brief The expression evaluation context. 548 ExpressionEvaluationContext Context; 549 550 /// \brief Whether the enclosing context needed a cleanup. 551 bool ParentNeedsCleanups; 552 553 /// \brief The number of temporaries that were active when we 554 /// entered this expression evaluation context. 555 unsigned NumTemporaries; 556 557 /// \brief The set of declarations referenced within a 558 /// potentially potentially-evaluated context. 559 /// 560 /// When leaving a potentially potentially-evaluated context, each 561 /// of these elements will be as referenced if the corresponding 562 /// potentially potentially evaluated expression is potentially 563 /// evaluated. 564 PotentiallyReferencedDecls *PotentiallyReferenced; 565 566 /// \brief The set of diagnostics to emit should this potentially 567 /// potentially-evaluated context become evaluated. 568 PotentiallyEmittedDiagnostics *PotentiallyDiagnosed; 569 570 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 571 unsigned NumTemporaries, 572 bool ParentNeedsCleanups) 573 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups), 574 NumTemporaries(NumTemporaries), 575 PotentiallyReferenced(0), PotentiallyDiagnosed(0) { } 576 577 void addReferencedDecl(SourceLocation Loc, Decl *Decl) { 578 if (!PotentiallyReferenced) 579 PotentiallyReferenced = new PotentiallyReferencedDecls; 580 PotentiallyReferenced->push_back(std::make_pair(Loc, Decl)); 581 } 582 583 void addDiagnostic(SourceLocation Loc, const PartialDiagnostic &PD) { 584 if (!PotentiallyDiagnosed) 585 PotentiallyDiagnosed = new PotentiallyEmittedDiagnostics; 586 PotentiallyDiagnosed->push_back(std::make_pair(Loc, PD)); 587 } 588 589 void Destroy() { 590 delete PotentiallyReferenced; 591 delete PotentiallyDiagnosed; 592 PotentiallyReferenced = 0; 593 PotentiallyDiagnosed = 0; 594 } 595 }; 596 597 /// A stack of expression evaluation contexts. 598 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 599 600 /// SpecialMemberOverloadResult - The overloading result for a special member 601 /// function. 602 /// 603 /// This is basically a wrapper around PointerIntPair. The lowest bit of the 604 /// integer is used to determine whether we have a parameter qualification 605 /// match, the second-lowest is whether we had success in resolving the 606 /// overload to a unique non-deleted function. 607 /// 608 /// The ConstParamMatch bit represents whether, when looking up a copy 609 /// constructor or assignment operator, we found a potential copy 610 /// constructor/assignment operator whose first parameter is const-qualified. 611 /// This is used for determining parameter types of other objects and is 612 /// utterly meaningless on other types of special members. 613 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 614 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 615 public: 616 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 617 : FastFoldingSetNode(ID) 618 {} 619 620 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 621 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 622 623 bool hasSuccess() const { return Pair.getInt() & 0x1; } 624 void setSuccess(bool B) { 625 Pair.setInt(unsigned(B) | hasConstParamMatch() << 1); 626 } 627 628 bool hasConstParamMatch() const { return Pair.getInt() & 0x2; } 629 void setConstParamMatch(bool B) { 630 Pair.setInt(B << 1 | unsigned(hasSuccess())); 631 } 632 }; 633 634 /// \brief A cache of special member function overload resolution results 635 /// for C++ records. 636 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 637 638 /// \brief Whether the code handled by Sema should be considered a 639 /// complete translation unit or not. 640 /// 641 /// When true (which is generally the case), Sema will perform 642 /// end-of-translation-unit semantic tasks (such as creating 643 /// initializers for tentative definitions in C) once parsing has 644 /// completed. This flag will be false when building PCH files, 645 /// since a PCH file is by definition not a complete translation 646 /// unit. 647 bool CompleteTranslationUnit; 648 649 llvm::BumpPtrAllocator BumpAlloc; 650 651 /// \brief The number of SFINAE diagnostics that have been trapped. 652 unsigned NumSFINAEErrors; 653 654 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> > 655 UnparsedDefaultArgInstantiationsMap; 656 657 /// \brief A mapping from parameters with unparsed default arguments to the 658 /// set of instantiations of each parameter. 659 /// 660 /// This mapping is a temporary data structure used when parsing 661 /// nested class templates or nested classes of class templates, 662 /// where we might end up instantiating an inner class before the 663 /// default arguments of its methods have been parsed. 664 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 665 666 // Contains the locations of the beginning of unparsed default 667 // argument locations. 668 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 669 670 /// UndefinedInternals - all the used, undefined objects with 671 /// internal linkage in this translation unit. 672 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 673 674 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 675 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 676 677 /// Method Pool - allows efficient lookup when typechecking messages to "id". 678 /// We need to maintain a list, since selectors can have differing signatures 679 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 680 /// of selectors are "overloaded"). 681 GlobalMethodPool MethodPool; 682 683 /// Method selectors used in a @selector expression. Used for implementation 684 /// of -Wselector. 685 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 686 687 GlobalMethodPool::iterator ReadMethodPool(Selector Sel); 688 689 /// Private Helper predicate to check for 'self'. 690 bool isSelfExpr(Expr *RExpr); 691public: 692 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 693 bool CompleteTranslationUnit = true, 694 CodeCompleteConsumer *CompletionConsumer = 0); 695 ~Sema(); 696 697 /// \brief Perform initialization that occurs after the parser has been 698 /// initialized but before it parses anything. 699 void Initialize(); 700 701 const LangOptions &getLangOptions() const { return LangOpts; } 702 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 703 FPOptions &getFPOptions() { return FPFeatures; } 704 705 Diagnostic &getDiagnostics() const { return Diags; } 706 SourceManager &getSourceManager() const { return SourceMgr; } 707 const TargetAttributesSema &getTargetAttributesSema() const; 708 Preprocessor &getPreprocessor() const { return PP; } 709 ASTContext &getASTContext() const { return Context; } 710 ASTConsumer &getASTConsumer() const { return Consumer; } 711 ASTMutationListener *getASTMutationListener() const; 712 713 void PrintStats() const; 714 715 /// \brief Helper class that creates diagnostics with optional 716 /// template instantiation stacks. 717 /// 718 /// This class provides a wrapper around the basic DiagnosticBuilder 719 /// class that emits diagnostics. SemaDiagnosticBuilder is 720 /// responsible for emitting the diagnostic (as DiagnosticBuilder 721 /// does) and, if the diagnostic comes from inside a template 722 /// instantiation, printing the template instantiation stack as 723 /// well. 724 class SemaDiagnosticBuilder : public DiagnosticBuilder { 725 Sema &SemaRef; 726 unsigned DiagID; 727 728 public: 729 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 730 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 731 732 explicit SemaDiagnosticBuilder(Sema &SemaRef) 733 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 734 735 ~SemaDiagnosticBuilder(); 736 }; 737 738 /// \brief Emit a diagnostic. 739 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 740 741 /// \brief Emit a partial diagnostic. 742 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 743 744 /// \brief Build a partial diagnostic. 745 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 746 747 bool findMacroSpelling(SourceLocation &loc, StringRef name); 748 749 ExprResult Owned(Expr* E) { return E; } 750 ExprResult Owned(ExprResult R) { return R; } 751 StmtResult Owned(Stmt* S) { return S; } 752 753 void ActOnEndOfTranslationUnit(); 754 755 void CheckDelegatingCtorCycles(); 756 757 Scope *getScopeForContext(DeclContext *Ctx); 758 759 void PushFunctionScope(); 760 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 761 void PopFunctionOrBlockScope(const sema::AnalysisBasedWarnings::Policy *WP =0, 762 const Decl *D = 0, const BlockExpr *blkExpr = 0); 763 764 sema::FunctionScopeInfo *getCurFunction() const { 765 return FunctionScopes.back(); 766 } 767 768 bool hasAnyUnrecoverableErrorsInThisFunction() const; 769 770 /// \brief Retrieve the current block, if any. 771 sema::BlockScopeInfo *getCurBlock(); 772 773 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 774 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 775 776 //===--------------------------------------------------------------------===// 777 // Type Analysis / Processing: SemaType.cpp. 778 // 779 780 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 781 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 782 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 783 } 784 QualType BuildPointerType(QualType T, 785 SourceLocation Loc, DeclarationName Entity); 786 QualType BuildReferenceType(QualType T, bool LValueRef, 787 SourceLocation Loc, DeclarationName Entity); 788 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 789 Expr *ArraySize, unsigned Quals, 790 SourceRange Brackets, DeclarationName Entity); 791 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 792 SourceLocation AttrLoc); 793 QualType BuildFunctionType(QualType T, 794 QualType *ParamTypes, unsigned NumParamTypes, 795 bool Variadic, unsigned Quals, 796 RefQualifierKind RefQualifier, 797 SourceLocation Loc, DeclarationName Entity, 798 FunctionType::ExtInfo Info); 799 QualType BuildMemberPointerType(QualType T, QualType Class, 800 SourceLocation Loc, 801 DeclarationName Entity); 802 QualType BuildBlockPointerType(QualType T, 803 SourceLocation Loc, DeclarationName Entity); 804 QualType BuildParenType(QualType T); 805 806 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); 807 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); 808 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 809 TypeSourceInfo *ReturnTypeInfo); 810 /// \brief Package the given type and TSI into a ParsedType. 811 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 812 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 813 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 814 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 815 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 816 bool CheckDistantExceptionSpec(QualType T); 817 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 818 bool CheckEquivalentExceptionSpec( 819 const FunctionProtoType *Old, SourceLocation OldLoc, 820 const FunctionProtoType *New, SourceLocation NewLoc); 821 bool CheckEquivalentExceptionSpec( 822 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 823 const FunctionProtoType *Old, SourceLocation OldLoc, 824 const FunctionProtoType *New, SourceLocation NewLoc, 825 bool *MissingExceptionSpecification = 0, 826 bool *MissingEmptyExceptionSpecification = 0, 827 bool AllowNoexceptAllMatchWithNoSpec = false, 828 bool IsOperatorNew = false); 829 bool CheckExceptionSpecSubset( 830 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 831 const FunctionProtoType *Superset, SourceLocation SuperLoc, 832 const FunctionProtoType *Subset, SourceLocation SubLoc); 833 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 834 const FunctionProtoType *Target, SourceLocation TargetLoc, 835 const FunctionProtoType *Source, SourceLocation SourceLoc); 836 837 TypeResult ActOnTypeName(Scope *S, Declarator &D); 838 839 bool RequireCompleteType(SourceLocation Loc, QualType T, 840 const PartialDiagnostic &PD, 841 std::pair<SourceLocation, PartialDiagnostic> Note); 842 bool RequireCompleteType(SourceLocation Loc, QualType T, 843 const PartialDiagnostic &PD); 844 bool RequireCompleteType(SourceLocation Loc, QualType T, 845 unsigned DiagID); 846 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 847 std::pair<SourceLocation, 848 PartialDiagnostic> Note); 849 850 851 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 852 const CXXScopeSpec &SS, QualType T); 853 854 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 855 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 856 QualType BuildUnaryTransformType(QualType BaseType, 857 UnaryTransformType::UTTKind UKind, 858 SourceLocation Loc); 859 860 //===--------------------------------------------------------------------===// 861 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 862 // 863 864 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 865 866 void DiagnoseUseOfUnimplementedSelectors(); 867 868 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 869 Scope *S, CXXScopeSpec *SS = 0, 870 bool isClassName = false, 871 bool HasTrailingDot = false, 872 ParsedType ObjectType = ParsedType(), 873 bool WantNontrivialTypeSourceInfo = false); 874 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 875 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS); 876 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 877 SourceLocation IILoc, 878 Scope *S, 879 CXXScopeSpec *SS, 880 ParsedType &SuggestedType); 881 882 /// \brief Describes the result of the name lookup and resolution performed 883 /// by \c ClassifyName(). 884 enum NameClassificationKind { 885 NC_Unknown, 886 NC_Error, 887 NC_Keyword, 888 NC_Type, 889 NC_Expression, 890 NC_NestedNameSpecifier, 891 NC_TypeTemplate, 892 NC_FunctionTemplate 893 }; 894 895 class NameClassification { 896 NameClassificationKind Kind; 897 ExprResult Expr; 898 TemplateName Template; 899 ParsedType Type; 900 const IdentifierInfo *Keyword; 901 902 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 903 904 public: 905 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 906 907 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 908 909 NameClassification(const IdentifierInfo *Keyword) 910 : Kind(NC_Keyword), Keyword(Keyword) { } 911 912 static NameClassification Error() { 913 return NameClassification(NC_Error); 914 } 915 916 static NameClassification Unknown() { 917 return NameClassification(NC_Unknown); 918 } 919 920 static NameClassification NestedNameSpecifier() { 921 return NameClassification(NC_NestedNameSpecifier); 922 } 923 924 static NameClassification TypeTemplate(TemplateName Name) { 925 NameClassification Result(NC_TypeTemplate); 926 Result.Template = Name; 927 return Result; 928 } 929 930 static NameClassification FunctionTemplate(TemplateName Name) { 931 NameClassification Result(NC_FunctionTemplate); 932 Result.Template = Name; 933 return Result; 934 } 935 936 NameClassificationKind getKind() const { return Kind; } 937 938 ParsedType getType() const { 939 assert(Kind == NC_Type); 940 return Type; 941 } 942 943 ExprResult getExpression() const { 944 assert(Kind == NC_Expression); 945 return Expr; 946 } 947 948 TemplateName getTemplateName() const { 949 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 950 return Template; 951 } 952 953 TemplateNameKind getTemplateNameKind() const { 954 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 955 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 956 } 957}; 958 959 /// \brief Perform name lookup on the given name, classifying it based on 960 /// the results of name lookup and the following token. 961 /// 962 /// This routine is used by the parser to resolve identifiers and help direct 963 /// parsing. When the identifier cannot be found, this routine will attempt 964 /// to correct the typo and classify based on the resulting name. 965 /// 966 /// \param S The scope in which we're performing name lookup. 967 /// 968 /// \param SS The nested-name-specifier that precedes the name. 969 /// 970 /// \param Name The identifier. If typo correction finds an alternative name, 971 /// this pointer parameter will be updated accordingly. 972 /// 973 /// \param NameLoc The location of the identifier. 974 /// 975 /// \param NextToken The token following the identifier. Used to help 976 /// disambiguate the name. 977 NameClassification ClassifyName(Scope *S, 978 CXXScopeSpec &SS, 979 IdentifierInfo *&Name, 980 SourceLocation NameLoc, 981 const Token &NextToken); 982 983 Decl *ActOnDeclarator(Scope *S, Declarator &D); 984 985 Decl *HandleDeclarator(Scope *S, Declarator &D, 986 MultiTemplateParamsArg TemplateParameterLists, 987 bool IsFunctionDefinition); 988 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 989 const LookupResult &Previous, 990 Scope *S); 991 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 992 void DiagnoseFunctionSpecifiers(Declarator& D); 993 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 994 void CheckShadow(Scope *S, VarDecl *D); 995 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 996 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 997 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 998 QualType R, TypeSourceInfo *TInfo, 999 LookupResult &Previous, bool &Redeclaration); 1000 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 1001 LookupResult &Previous, bool &Redeclaration); 1002 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1003 QualType R, TypeSourceInfo *TInfo, 1004 LookupResult &Previous, 1005 MultiTemplateParamsArg TemplateParamLists, 1006 bool &Redeclaration); 1007 void CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous, 1008 bool &Redeclaration); 1009 void CheckCompleteVariableDeclaration(VarDecl *var); 1010 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1011 QualType R, TypeSourceInfo *TInfo, 1012 LookupResult &Previous, 1013 MultiTemplateParamsArg TemplateParamLists, 1014 bool IsFunctionDefinition, 1015 bool &Redeclaration); 1016 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1017 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1018 void CheckFunctionDeclaration(Scope *S, 1019 FunctionDecl *NewFD, LookupResult &Previous, 1020 bool IsExplicitSpecialization, 1021 bool &Redeclaration); 1022 void CheckMain(FunctionDecl *FD); 1023 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1024 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1025 SourceLocation Loc, 1026 QualType T); 1027 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1028 SourceLocation NameLoc, IdentifierInfo *Name, 1029 QualType T, TypeSourceInfo *TSInfo, 1030 StorageClass SC, StorageClass SCAsWritten); 1031 void ActOnParamDefaultArgument(Decl *param, 1032 SourceLocation EqualLoc, 1033 Expr *defarg); 1034 void ActOnParamUnparsedDefaultArgument(Decl *param, 1035 SourceLocation EqualLoc, 1036 SourceLocation ArgLoc); 1037 void ActOnParamDefaultArgumentError(Decl *param); 1038 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1039 SourceLocation EqualLoc); 1040 1041 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1042 bool TypeMayContainAuto); 1043 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1044 void ActOnInitializerError(Decl *Dcl); 1045 void ActOnCXXForRangeDecl(Decl *D); 1046 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1047 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1048 void FinalizeDeclaration(Decl *D); 1049 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1050 Decl **Group, 1051 unsigned NumDecls); 1052 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1053 bool TypeMayContainAuto = true); 1054 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1055 SourceLocation LocAfterDecls); 1056 void CheckForFunctionRedefinition(FunctionDecl *FD); 1057 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1058 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1059 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1060 1061 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1062 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1063 1064 /// \brief Diagnose any unused parameters in the given sequence of 1065 /// ParmVarDecl pointers. 1066 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1067 ParmVarDecl * const *End); 1068 1069 /// \brief Diagnose whether the size of parameters or return value of a 1070 /// function or obj-c method definition is pass-by-value and larger than a 1071 /// specified threshold. 1072 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1073 ParmVarDecl * const *End, 1074 QualType ReturnTy, 1075 NamedDecl *D); 1076 1077 void DiagnoseInvalidJumps(Stmt *Body); 1078 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1079 SourceLocation AsmLoc, 1080 SourceLocation RParenLoc); 1081 1082 /// Scope actions. 1083 void ActOnPopScope(SourceLocation Loc, Scope *S); 1084 void ActOnTranslationUnitScope(Scope *S); 1085 1086 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1087 DeclSpec &DS); 1088 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1089 DeclSpec &DS, 1090 MultiTemplateParamsArg TemplateParams); 1091 1092 StmtResult ActOnVlaStmt(const DeclSpec &DS); 1093 1094 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1095 AccessSpecifier AS, 1096 RecordDecl *Record); 1097 1098 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1099 RecordDecl *Record); 1100 1101 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1102 TagTypeKind NewTag, bool isDefinition, 1103 SourceLocation NewTagLoc, 1104 const IdentifierInfo &Name); 1105 1106 enum TagUseKind { 1107 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1108 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1109 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1110 TUK_Friend // Friend declaration: 'friend struct foo;' 1111 }; 1112 1113 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1114 SourceLocation KWLoc, CXXScopeSpec &SS, 1115 IdentifierInfo *Name, SourceLocation NameLoc, 1116 AttributeList *Attr, AccessSpecifier AS, 1117 MultiTemplateParamsArg TemplateParameterLists, 1118 bool &OwnedDecl, bool &IsDependent, bool ScopedEnum, 1119 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1120 1121 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1122 unsigned TagSpec, SourceLocation TagLoc, 1123 CXXScopeSpec &SS, 1124 IdentifierInfo *Name, SourceLocation NameLoc, 1125 AttributeList *Attr, 1126 MultiTemplateParamsArg TempParamLists); 1127 1128 TypeResult ActOnDependentTag(Scope *S, 1129 unsigned TagSpec, 1130 TagUseKind TUK, 1131 const CXXScopeSpec &SS, 1132 IdentifierInfo *Name, 1133 SourceLocation TagLoc, 1134 SourceLocation NameLoc); 1135 1136 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1137 IdentifierInfo *ClassName, 1138 SmallVectorImpl<Decl *> &Decls); 1139 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1140 Declarator &D, Expr *BitfieldWidth); 1141 1142 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1143 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1144 AccessSpecifier AS); 1145 1146 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1147 TypeSourceInfo *TInfo, 1148 RecordDecl *Record, SourceLocation Loc, 1149 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1150 SourceLocation TSSL, 1151 AccessSpecifier AS, NamedDecl *PrevDecl, 1152 Declarator *D = 0); 1153 1154 enum CXXSpecialMember { 1155 CXXDefaultConstructor, 1156 CXXCopyConstructor, 1157 CXXMoveConstructor, 1158 CXXCopyAssignment, 1159 CXXMoveAssignment, 1160 CXXDestructor, 1161 CXXInvalid 1162 }; 1163 bool CheckNontrivialField(FieldDecl *FD); 1164 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1165 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1166 void ActOnLastBitfield(SourceLocation DeclStart, Decl *IntfDecl, 1167 SmallVectorImpl<Decl *> &AllIvarDecls); 1168 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, Decl *IntfDecl, 1169 Declarator &D, Expr *BitfieldWidth, 1170 tok::ObjCKeywordKind visibility); 1171 1172 // This is used for both record definitions and ObjC interface declarations. 1173 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1174 Decl **Fields, unsigned NumFields, 1175 SourceLocation LBrac, SourceLocation RBrac, 1176 AttributeList *AttrList); 1177 1178 /// ActOnTagStartDefinition - Invoked when we have entered the 1179 /// scope of a tag's definition (e.g., for an enumeration, class, 1180 /// struct, or union). 1181 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1182 1183 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1184 /// C++ record definition's base-specifiers clause and are starting its 1185 /// member declarations. 1186 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1187 SourceLocation FinalLoc, 1188 SourceLocation LBraceLoc); 1189 1190 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1191 /// the definition of a tag (enumeration, class, struct, or union). 1192 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1193 SourceLocation RBraceLoc); 1194 1195 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1196 /// error parsing the definition of a tag. 1197 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1198 1199 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1200 EnumConstantDecl *LastEnumConst, 1201 SourceLocation IdLoc, 1202 IdentifierInfo *Id, 1203 Expr *val); 1204 1205 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1206 SourceLocation IdLoc, IdentifierInfo *Id, 1207 AttributeList *Attrs, 1208 SourceLocation EqualLoc, Expr *Val); 1209 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1210 SourceLocation RBraceLoc, Decl *EnumDecl, 1211 Decl **Elements, unsigned NumElements, 1212 Scope *S, AttributeList *Attr); 1213 1214 DeclContext *getContainingDC(DeclContext *DC); 1215 1216 /// Set the current declaration context until it gets popped. 1217 void PushDeclContext(Scope *S, DeclContext *DC); 1218 void PopDeclContext(); 1219 1220 /// EnterDeclaratorContext - Used when we must lookup names in the context 1221 /// of a declarator's nested name specifier. 1222 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1223 void ExitDeclaratorContext(Scope *S); 1224 1225 DeclContext *getFunctionLevelDeclContext(); 1226 1227 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1228 /// to the function decl for the function being parsed. If we're currently 1229 /// in a 'block', this returns the containing context. 1230 FunctionDecl *getCurFunctionDecl(); 1231 1232 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1233 /// the method decl for the method being parsed. If we're currently 1234 /// in a 'block', this returns the containing context. 1235 ObjCMethodDecl *getCurMethodDecl(); 1236 1237 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1238 /// or C function we're in, otherwise return null. If we're currently 1239 /// in a 'block', this returns the containing context. 1240 NamedDecl *getCurFunctionOrMethodDecl(); 1241 1242 /// Add this decl to the scope shadowed decl chains. 1243 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1244 1245 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1246 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1247 /// true if 'D' belongs to the given declaration context. 1248 /// 1249 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1250 /// whether the declaration is in scope for the purposes of explicit template 1251 /// instantiation or specialization. The default is false. 1252 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1253 bool ExplicitInstantiationOrSpecialization = false); 1254 1255 /// Finds the scope corresponding to the given decl context, if it 1256 /// happens to be an enclosing scope. Otherwise return NULL. 1257 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1258 1259 /// Subroutines of ActOnDeclarator(). 1260 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1261 TypeSourceInfo *TInfo); 1262 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1263 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1264 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1265 void mergeObjCMethodDecls(ObjCMethodDecl *New, const ObjCMethodDecl *Old); 1266 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1267 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1268 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1269 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1270 1271 // AssignmentAction - This is used by all the assignment diagnostic functions 1272 // to represent what is actually causing the operation 1273 enum AssignmentAction { 1274 AA_Assigning, 1275 AA_Passing, 1276 AA_Returning, 1277 AA_Converting, 1278 AA_Initializing, 1279 AA_Sending, 1280 AA_Casting 1281 }; 1282 1283 /// C++ Overloading. 1284 enum OverloadKind { 1285 /// This is a legitimate overload: the existing declarations are 1286 /// functions or function templates with different signatures. 1287 Ovl_Overload, 1288 1289 /// This is not an overload because the signature exactly matches 1290 /// an existing declaration. 1291 Ovl_Match, 1292 1293 /// This is not an overload because the lookup results contain a 1294 /// non-function. 1295 Ovl_NonFunction 1296 }; 1297 OverloadKind CheckOverload(Scope *S, 1298 FunctionDecl *New, 1299 const LookupResult &OldDecls, 1300 NamedDecl *&OldDecl, 1301 bool IsForUsingDecl); 1302 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1303 1304 /// \brief Checks availability of the function depending on the current 1305 /// function context.Inside an unavailable function,unavailability is ignored. 1306 /// 1307 /// \returns true if \arg FD is unavailable and current context is inside 1308 /// an available function, false otherwise. 1309 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1310 1311 ImplicitConversionSequence 1312 TryImplicitConversion(Expr *From, QualType ToType, 1313 bool SuppressUserConversions, 1314 bool AllowExplicit, 1315 bool InOverloadResolution, 1316 bool CStyle, 1317 bool AllowObjCWritebackConversion); 1318 1319 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1320 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1321 bool IsComplexPromotion(QualType FromType, QualType ToType); 1322 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1323 bool InOverloadResolution, 1324 QualType& ConvertedType, bool &IncompatibleObjC); 1325 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1326 QualType& ConvertedType, bool &IncompatibleObjC); 1327 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1328 QualType &ConvertedType); 1329 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1330 QualType& ConvertedType); 1331 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1332 const FunctionProtoType *NewType); 1333 1334 bool CheckPointerConversion(Expr *From, QualType ToType, 1335 CastKind &Kind, 1336 CXXCastPath& BasePath, 1337 bool IgnoreBaseAccess); 1338 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1339 bool InOverloadResolution, 1340 QualType &ConvertedType); 1341 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1342 CastKind &Kind, 1343 CXXCastPath &BasePath, 1344 bool IgnoreBaseAccess); 1345 bool IsQualificationConversion(QualType FromType, QualType ToType, 1346 bool CStyle, bool &ObjCLifetimeConversion); 1347 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1348 QualType &ResultTy); 1349 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1350 1351 1352 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1353 const VarDecl *NRVOCandidate, 1354 QualType ResultType, 1355 Expr *Value, 1356 bool AllowNRVO = true); 1357 1358 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1359 ExprResult Init); 1360 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1361 SourceLocation EqualLoc, 1362 ExprResult Init, 1363 bool TopLevelOfInitList = false); 1364 ExprResult PerformObjectArgumentInitialization(Expr *From, 1365 NestedNameSpecifier *Qualifier, 1366 NamedDecl *FoundDecl, 1367 CXXMethodDecl *Method); 1368 1369 ExprResult PerformContextuallyConvertToBool(Expr *From); 1370 ExprResult PerformContextuallyConvertToObjCId(Expr *From); 1371 1372 ExprResult 1373 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1374 const PartialDiagnostic &NotIntDiag, 1375 const PartialDiagnostic &IncompleteDiag, 1376 const PartialDiagnostic &ExplicitConvDiag, 1377 const PartialDiagnostic &ExplicitConvNote, 1378 const PartialDiagnostic &AmbigDiag, 1379 const PartialDiagnostic &AmbigNote, 1380 const PartialDiagnostic &ConvDiag); 1381 1382 ExprResult PerformObjectMemberConversion(Expr *From, 1383 NestedNameSpecifier *Qualifier, 1384 NamedDecl *FoundDecl, 1385 NamedDecl *Member); 1386 1387 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1388 // TODO: make this is a typesafe union. 1389 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1390 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1391 1392 void AddOverloadCandidate(NamedDecl *Function, 1393 DeclAccessPair FoundDecl, 1394 Expr **Args, unsigned NumArgs, 1395 OverloadCandidateSet &CandidateSet); 1396 1397 void AddOverloadCandidate(FunctionDecl *Function, 1398 DeclAccessPair FoundDecl, 1399 Expr **Args, unsigned NumArgs, 1400 OverloadCandidateSet& CandidateSet, 1401 bool SuppressUserConversions = false, 1402 bool PartialOverloading = false); 1403 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1404 Expr **Args, unsigned NumArgs, 1405 OverloadCandidateSet& CandidateSet, 1406 bool SuppressUserConversions = false); 1407 void AddMethodCandidate(DeclAccessPair FoundDecl, 1408 QualType ObjectType, 1409 Expr::Classification ObjectClassification, 1410 Expr **Args, unsigned NumArgs, 1411 OverloadCandidateSet& CandidateSet, 1412 bool SuppressUserConversion = false); 1413 void AddMethodCandidate(CXXMethodDecl *Method, 1414 DeclAccessPair FoundDecl, 1415 CXXRecordDecl *ActingContext, QualType ObjectType, 1416 Expr::Classification ObjectClassification, 1417 Expr **Args, unsigned NumArgs, 1418 OverloadCandidateSet& CandidateSet, 1419 bool SuppressUserConversions = false); 1420 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1421 DeclAccessPair FoundDecl, 1422 CXXRecordDecl *ActingContext, 1423 TemplateArgumentListInfo *ExplicitTemplateArgs, 1424 QualType ObjectType, 1425 Expr::Classification ObjectClassification, 1426 Expr **Args, unsigned NumArgs, 1427 OverloadCandidateSet& CandidateSet, 1428 bool SuppressUserConversions = false); 1429 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1430 DeclAccessPair FoundDecl, 1431 TemplateArgumentListInfo *ExplicitTemplateArgs, 1432 Expr **Args, unsigned NumArgs, 1433 OverloadCandidateSet& CandidateSet, 1434 bool SuppressUserConversions = false); 1435 void AddConversionCandidate(CXXConversionDecl *Conversion, 1436 DeclAccessPair FoundDecl, 1437 CXXRecordDecl *ActingContext, 1438 Expr *From, QualType ToType, 1439 OverloadCandidateSet& CandidateSet); 1440 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1441 DeclAccessPair FoundDecl, 1442 CXXRecordDecl *ActingContext, 1443 Expr *From, QualType ToType, 1444 OverloadCandidateSet &CandidateSet); 1445 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1446 DeclAccessPair FoundDecl, 1447 CXXRecordDecl *ActingContext, 1448 const FunctionProtoType *Proto, 1449 Expr *Object, Expr **Args, unsigned NumArgs, 1450 OverloadCandidateSet& CandidateSet); 1451 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1452 SourceLocation OpLoc, 1453 Expr **Args, unsigned NumArgs, 1454 OverloadCandidateSet& CandidateSet, 1455 SourceRange OpRange = SourceRange()); 1456 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1457 Expr **Args, unsigned NumArgs, 1458 OverloadCandidateSet& CandidateSet, 1459 bool IsAssignmentOperator = false, 1460 unsigned NumContextualBoolArguments = 0); 1461 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1462 SourceLocation OpLoc, 1463 Expr **Args, unsigned NumArgs, 1464 OverloadCandidateSet& CandidateSet); 1465 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1466 bool Operator, 1467 Expr **Args, unsigned NumArgs, 1468 TemplateArgumentListInfo *ExplicitTemplateArgs, 1469 OverloadCandidateSet& CandidateSet, 1470 bool PartialOverloading = false, 1471 bool StdNamespaceIsAssociated = false); 1472 1473 // Emit as a 'note' the specific overload candidate 1474 void NoteOverloadCandidate(FunctionDecl *Fn); 1475 1476 // Emit as a series of 'note's all template and non-templates 1477 // identified by the expression Expr 1478 void NoteAllOverloadCandidates(Expr* E); 1479 1480 // [PossiblyAFunctionType] --> [Return] 1481 // NonFunctionType --> NonFunctionType 1482 // R (A) --> R(A) 1483 // R (*)(A) --> R (A) 1484 // R (&)(A) --> R (A) 1485 // R (S::*)(A) --> R (A) 1486 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1487 1488 FunctionDecl *ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, QualType TargetType, 1489 bool Complain, 1490 DeclAccessPair &Found); 1491 1492 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1493 bool Complain = false, 1494 DeclAccessPair* Found = 0); 1495 1496 ExprResult ResolveAndFixSingleFunctionTemplateSpecialization( 1497 Expr *SrcExpr, bool DoFunctionPointerConverion = false, 1498 bool Complain = false, 1499 const SourceRange& OpRangeForComplaining = SourceRange(), 1500 QualType DestTypeForComplaining = QualType(), 1501 unsigned DiagIDForComplaining = 0); 1502 1503 1504 Expr *FixOverloadedFunctionReference(Expr *E, 1505 DeclAccessPair FoundDecl, 1506 FunctionDecl *Fn); 1507 ExprResult FixOverloadedFunctionReference(ExprResult, 1508 DeclAccessPair FoundDecl, 1509 FunctionDecl *Fn); 1510 1511 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1512 Expr **Args, unsigned NumArgs, 1513 OverloadCandidateSet &CandidateSet, 1514 bool PartialOverloading = false); 1515 1516 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1517 UnresolvedLookupExpr *ULE, 1518 SourceLocation LParenLoc, 1519 Expr **Args, unsigned NumArgs, 1520 SourceLocation RParenLoc, 1521 Expr *ExecConfig); 1522 1523 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1524 unsigned Opc, 1525 const UnresolvedSetImpl &Fns, 1526 Expr *input); 1527 1528 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1529 unsigned Opc, 1530 const UnresolvedSetImpl &Fns, 1531 Expr *LHS, Expr *RHS); 1532 1533 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1534 SourceLocation RLoc, 1535 Expr *Base,Expr *Idx); 1536 1537 ExprResult 1538 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1539 SourceLocation LParenLoc, Expr **Args, 1540 unsigned NumArgs, SourceLocation RParenLoc); 1541 ExprResult 1542 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1543 Expr **Args, unsigned NumArgs, 1544 SourceLocation RParenLoc); 1545 1546 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1547 SourceLocation OpLoc); 1548 1549 /// CheckCallReturnType - Checks that a call expression's return type is 1550 /// complete. Returns true on failure. The location passed in is the location 1551 /// that best represents the call. 1552 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1553 CallExpr *CE, FunctionDecl *FD); 1554 1555 /// Helpers for dealing with blocks and functions. 1556 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1557 bool CheckParameterNames); 1558 void CheckCXXDefaultArguments(FunctionDecl *FD); 1559 void CheckExtraCXXDefaultArguments(Declarator &D); 1560 Scope *getNonFieldDeclScope(Scope *S); 1561 1562 /// \name Name lookup 1563 /// 1564 /// These routines provide name lookup that is used during semantic 1565 /// analysis to resolve the various kinds of names (identifiers, 1566 /// overloaded operator names, constructor names, etc.) into zero or 1567 /// more declarations within a particular scope. The major entry 1568 /// points are LookupName, which performs unqualified name lookup, 1569 /// and LookupQualifiedName, which performs qualified name lookup. 1570 /// 1571 /// All name lookup is performed based on some specific criteria, 1572 /// which specify what names will be visible to name lookup and how 1573 /// far name lookup should work. These criteria are important both 1574 /// for capturing language semantics (certain lookups will ignore 1575 /// certain names, for example) and for performance, since name 1576 /// lookup is often a bottleneck in the compilation of C++. Name 1577 /// lookup criteria is specified via the LookupCriteria enumeration. 1578 /// 1579 /// The results of name lookup can vary based on the kind of name 1580 /// lookup performed, the current language, and the translation 1581 /// unit. In C, for example, name lookup will either return nothing 1582 /// (no entity found) or a single declaration. In C++, name lookup 1583 /// can additionally refer to a set of overloaded functions or 1584 /// result in an ambiguity. All of the possible results of name 1585 /// lookup are captured by the LookupResult class, which provides 1586 /// the ability to distinguish among them. 1587 //@{ 1588 1589 /// @brief Describes the kind of name lookup to perform. 1590 enum LookupNameKind { 1591 /// Ordinary name lookup, which finds ordinary names (functions, 1592 /// variables, typedefs, etc.) in C and most kinds of names 1593 /// (functions, variables, members, types, etc.) in C++. 1594 LookupOrdinaryName = 0, 1595 /// Tag name lookup, which finds the names of enums, classes, 1596 /// structs, and unions. 1597 LookupTagName, 1598 /// Label name lookup. 1599 LookupLabel, 1600 /// Member name lookup, which finds the names of 1601 /// class/struct/union members. 1602 LookupMemberName, 1603 /// Look up of an operator name (e.g., operator+) for use with 1604 /// operator overloading. This lookup is similar to ordinary name 1605 /// lookup, but will ignore any declarations that are class members. 1606 LookupOperatorName, 1607 /// Look up of a name that precedes the '::' scope resolution 1608 /// operator in C++. This lookup completely ignores operator, object, 1609 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1610 LookupNestedNameSpecifierName, 1611 /// Look up a namespace name within a C++ using directive or 1612 /// namespace alias definition, ignoring non-namespace names (C++ 1613 /// [basic.lookup.udir]p1). 1614 LookupNamespaceName, 1615 /// Look up all declarations in a scope with the given name, 1616 /// including resolved using declarations. This is appropriate 1617 /// for checking redeclarations for a using declaration. 1618 LookupUsingDeclName, 1619 /// Look up an ordinary name that is going to be redeclared as a 1620 /// name with linkage. This lookup ignores any declarations that 1621 /// are outside of the current scope unless they have linkage. See 1622 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1623 LookupRedeclarationWithLinkage, 1624 /// Look up the name of an Objective-C protocol. 1625 LookupObjCProtocolName, 1626 /// Look up implicit 'self' parameter of an objective-c method. 1627 LookupObjCImplicitSelfParam, 1628 /// \brief Look up any declaration with any name. 1629 LookupAnyName 1630 }; 1631 1632 /// \brief Specifies whether (or how) name lookup is being performed for a 1633 /// redeclaration (vs. a reference). 1634 enum RedeclarationKind { 1635 /// \brief The lookup is a reference to this name that is not for the 1636 /// purpose of redeclaring the name. 1637 NotForRedeclaration = 0, 1638 /// \brief The lookup results will be used for redeclaration of a name, 1639 /// if an entity by that name already exists. 1640 ForRedeclaration 1641 }; 1642 1643private: 1644 bool CppLookupName(LookupResult &R, Scope *S); 1645 1646 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1647 CXXSpecialMember SM, 1648 bool ConstArg, 1649 bool VolatileArg, 1650 bool RValueThis, 1651 bool ConstThis, 1652 bool VolatileThis); 1653 1654 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1655 // 1656 // The boolean value will be true to indicate that the namespace was loaded 1657 // from an AST/PCH file, or false otherwise. 1658 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1659 1660 /// \brief Whether we have already loaded known namespaces from an extenal 1661 /// source. 1662 bool LoadedExternalKnownNamespaces; 1663 1664public: 1665 /// \brief Look up a name, looking for a single declaration. Return 1666 /// null if the results were absent, ambiguous, or overloaded. 1667 /// 1668 /// It is preferable to use the elaborated form and explicitly handle 1669 /// ambiguity and overloaded. 1670 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1671 SourceLocation Loc, 1672 LookupNameKind NameKind, 1673 RedeclarationKind Redecl 1674 = NotForRedeclaration); 1675 bool LookupName(LookupResult &R, Scope *S, 1676 bool AllowBuiltinCreation = false); 1677 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1678 bool InUnqualifiedLookup = false); 1679 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1680 bool AllowBuiltinCreation = false, 1681 bool EnteringContext = false); 1682 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1683 1684 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1685 QualType T1, QualType T2, 1686 UnresolvedSetImpl &Functions); 1687 1688 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1689 SourceLocation GnuLabelLoc = SourceLocation()); 1690 1691 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1692 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1693 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1694 unsigned Quals, 1695 bool *ConstParam = 0); 1696 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1697 bool RValueThis, unsigned ThisQuals, 1698 bool *ConstParam = 0); 1699 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1700 1701 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1702 Expr **Args, unsigned NumArgs, 1703 ADLResult &Functions, 1704 bool StdNamespaceIsAssociated = false); 1705 1706 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1707 VisibleDeclConsumer &Consumer, 1708 bool IncludeGlobalScope = true); 1709 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1710 VisibleDeclConsumer &Consumer, 1711 bool IncludeGlobalScope = true); 1712 1713 /// \brief The context in which typo-correction occurs. 1714 /// 1715 /// The typo-correction context affects which keywords (if any) are 1716 /// considered when trying to correct for typos. 1717 enum CorrectTypoContext { 1718 /// \brief An unknown context, where any keyword might be valid. 1719 CTC_Unknown, 1720 /// \brief A context where no keywords are used (e.g. we expect an actual 1721 /// name). 1722 CTC_NoKeywords, 1723 /// \brief A context where we're correcting a type name. 1724 CTC_Type, 1725 /// \brief An expression context. 1726 CTC_Expression, 1727 /// \brief A type cast, or anything else that can be followed by a '<'. 1728 CTC_CXXCasts, 1729 /// \brief A member lookup context. 1730 CTC_MemberLookup, 1731 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1732 CTC_ObjCIvarLookup, 1733 /// \brief An Objective-C property lookup context (e.g., self.prop). 1734 CTC_ObjCPropertyLookup, 1735 /// \brief The receiver of an Objective-C message send within an 1736 /// Objective-C method where 'super' is a valid keyword. 1737 CTC_ObjCMessageReceiver 1738 }; 1739 1740 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1741 Sema::LookupNameKind LookupKind, 1742 Scope *S, CXXScopeSpec *SS, 1743 DeclContext *MemberContext = NULL, 1744 bool EnteringContext = false, 1745 CorrectTypoContext CTC = CTC_Unknown, 1746 const ObjCObjectPointerType *OPT = NULL); 1747 1748 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1749 AssociatedNamespaceSet &AssociatedNamespaces, 1750 AssociatedClassSet &AssociatedClasses); 1751 1752 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1753 bool ConsiderLinkage, 1754 bool ExplicitInstantiationOrSpecialization); 1755 1756 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1757 //@} 1758 1759 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1760 SourceLocation IdLoc, 1761 bool TypoCorrection = false); 1762 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1763 Scope *S, bool ForRedeclaration, 1764 SourceLocation Loc); 1765 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1766 Scope *S); 1767 void AddKnownFunctionAttributes(FunctionDecl *FD); 1768 1769 // More parsing and symbol table subroutines. 1770 1771 // Decl attributes - this routine is the top level dispatcher. 1772 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1773 bool NonInheritable = true, bool Inheritable = true); 1774 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1775 bool NonInheritable = true, bool Inheritable = true); 1776 1777 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1778 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1779 bool CheckNoReturnAttr(const AttributeList &attr); 1780 1781 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1782 bool &IncompleteImpl, unsigned DiagID); 1783 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 1784 ObjCMethodDecl *MethodDecl, 1785 bool IsProtocolMethodDecl, 1786 bool IsDeclaration = false); 1787 1788 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1789 ObjCInterfaceDecl *IDecl); 1790 1791 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1792 1793 /// CheckProtocolMethodDefs - This routine checks unimplemented 1794 /// methods declared in protocol, and those referenced by it. 1795 /// \param IDecl - Used for checking for methods which may have been 1796 /// inherited. 1797 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1798 ObjCProtocolDecl *PDecl, 1799 bool& IncompleteImpl, 1800 const SelectorSet &InsMap, 1801 const SelectorSet &ClsMap, 1802 ObjCContainerDecl *CDecl); 1803 1804 /// CheckImplementationIvars - This routine checks if the instance variables 1805 /// listed in the implelementation match those listed in the interface. 1806 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1807 ObjCIvarDecl **Fields, unsigned nIvars, 1808 SourceLocation Loc); 1809 1810 /// \brief Determine whether we can synthesize a provisional ivar for the 1811 /// given name. 1812 ObjCPropertyDecl *canSynthesizeProvisionalIvar(IdentifierInfo *II); 1813 1814 /// \brief Determine whether we can synthesize a provisional ivar for the 1815 /// given property. 1816 bool canSynthesizeProvisionalIvar(ObjCPropertyDecl *Property); 1817 1818 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1819 /// remains unimplemented in the class or category @implementation. 1820 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1821 ObjCContainerDecl* IDecl, 1822 bool IncompleteImpl = false); 1823 1824 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1825 /// which must be implemented by this implementation. 1826 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1827 ObjCContainerDecl *CDecl, 1828 const SelectorSet &InsMap); 1829 1830 /// DefaultSynthesizeProperties - This routine default synthesizes all 1831 /// properties which must be synthesized in class's @implementation. 1832 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1833 ObjCInterfaceDecl *IDecl); 1834 1835 /// CollectImmediateProperties - This routine collects all properties in 1836 /// the class and its conforming protocols; but not those it its super class. 1837 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1838 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1839 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1840 1841 1842 /// LookupPropertyDecl - Looks up a property in the current class and all 1843 /// its protocols. 1844 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1845 IdentifierInfo *II); 1846 1847 /// Called by ActOnProperty to handle @property declarations in 1848 //// class extensions. 1849 Decl *HandlePropertyInClassExtension(Scope *S, 1850 ObjCCategoryDecl *CDecl, 1851 SourceLocation AtLoc, 1852 FieldDeclarator &FD, 1853 Selector GetterSel, 1854 Selector SetterSel, 1855 const bool isAssign, 1856 const bool isReadWrite, 1857 const unsigned Attributes, 1858 bool *isOverridingProperty, 1859 TypeSourceInfo *T, 1860 tok::ObjCKeywordKind MethodImplKind); 1861 1862 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1863 /// handle creating the ObjcPropertyDecl for a category or @interface. 1864 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1865 ObjCContainerDecl *CDecl, 1866 SourceLocation AtLoc, 1867 FieldDeclarator &FD, 1868 Selector GetterSel, 1869 Selector SetterSel, 1870 const bool isAssign, 1871 const bool isReadWrite, 1872 const unsigned Attributes, 1873 TypeSourceInfo *T, 1874 tok::ObjCKeywordKind MethodImplKind, 1875 DeclContext *lexicalDC = 0); 1876 1877 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1878 /// warning) when atomic property has one but not the other user-declared 1879 /// setter or getter. 1880 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1881 ObjCContainerDecl* IDecl); 1882 1883 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 1884 1885 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1886 1887 enum MethodMatchStrategy { 1888 MMS_loose, 1889 MMS_strict 1890 }; 1891 1892 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1893 /// true, or false, accordingly. 1894 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1895 const ObjCMethodDecl *PrevMethod, 1896 MethodMatchStrategy strategy = MMS_strict); 1897 1898 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1899 /// or protocol against those declared in their implementations. 1900 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1901 const SelectorSet &ClsMap, 1902 SelectorSet &InsMapSeen, 1903 SelectorSet &ClsMapSeen, 1904 ObjCImplDecl* IMPDecl, 1905 ObjCContainerDecl* IDecl, 1906 bool &IncompleteImpl, 1907 bool ImmediateClass); 1908 1909 /// MatchMethodsInClassAndItsProtocol - Check that any redeclaration of 1910 /// method in protocol in its qualified class match in their type and 1911 /// issue warnings otherwise. 1912 void MatchMethodsInClassAndItsProtocol(const ObjCInterfaceDecl *CDecl); 1913 1914private: 1915 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1916 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1917 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1918 1919 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1920 /// optionally warns if there are multiple signatures. 1921 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1922 bool receiverIdOrClass, 1923 bool warn, bool instance); 1924 1925public: 1926 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1927 /// unit are added to a global pool. This allows us to efficiently associate 1928 /// a selector with a method declaraation for purposes of typechecking 1929 /// messages sent to "id" (where the class of the object is unknown). 1930 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1931 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1932 } 1933 1934 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1935 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1936 AddMethodToGlobalPool(Method, impl, /*instance*/false); 1937 } 1938 1939 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 1940 /// there are multiple signatures. 1941 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 1942 bool receiverIdOrClass=false, 1943 bool warn=true) { 1944 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1945 warn, /*instance*/true); 1946 } 1947 1948 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 1949 /// there are multiple signatures. 1950 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 1951 bool receiverIdOrClass=false, 1952 bool warn=true) { 1953 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1954 warn, /*instance*/false); 1955 } 1956 1957 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 1958 /// implementation. 1959 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 1960 1961 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 1962 /// initialization. 1963 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 1964 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 1965 1966 //===--------------------------------------------------------------------===// 1967 // Statement Parsing Callbacks: SemaStmt.cpp. 1968public: 1969 class FullExprArg { 1970 public: 1971 FullExprArg(Sema &actions) : E(0) { } 1972 1973 // FIXME: The const_cast here is ugly. RValue references would make this 1974 // much nicer (or we could duplicate a bunch of the move semantics 1975 // emulation code from Ownership.h). 1976 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 1977 1978 ExprResult release() { 1979 return move(E); 1980 } 1981 1982 Expr *get() const { return E; } 1983 1984 Expr *operator->() { 1985 return E; 1986 } 1987 1988 private: 1989 // FIXME: No need to make the entire Sema class a friend when it's just 1990 // Sema::MakeFullExpr that needs access to the constructor below. 1991 friend class Sema; 1992 1993 explicit FullExprArg(Expr *expr) : E(expr) {} 1994 1995 Expr *E; 1996 }; 1997 1998 FullExprArg MakeFullExpr(Expr *Arg) { 1999 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 2000 } 2001 2002 StmtResult ActOnExprStmt(FullExprArg Expr); 2003 2004 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 2005 SourceLocation LeadingEmptyMacroLoc = SourceLocation()); 2006 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 2007 MultiStmtArg Elts, 2008 bool isStmtExpr); 2009 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2010 SourceLocation StartLoc, 2011 SourceLocation EndLoc); 2012 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2013 StmtResult ActOnForEachLValueExpr(Expr *E); 2014 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2015 SourceLocation DotDotDotLoc, Expr *RHSVal, 2016 SourceLocation ColonLoc); 2017 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2018 2019 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2020 SourceLocation ColonLoc, 2021 Stmt *SubStmt, Scope *CurScope); 2022 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2023 SourceLocation ColonLoc, Stmt *SubStmt); 2024 2025 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2026 FullExprArg CondVal, Decl *CondVar, 2027 Stmt *ThenVal, 2028 SourceLocation ElseLoc, Stmt *ElseVal); 2029 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2030 Expr *Cond, 2031 Decl *CondVar); 2032 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2033 Stmt *Switch, Stmt *Body); 2034 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2035 FullExprArg Cond, 2036 Decl *CondVar, Stmt *Body); 2037 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2038 SourceLocation WhileLoc, 2039 SourceLocation CondLParen, Expr *Cond, 2040 SourceLocation CondRParen); 2041 2042 StmtResult ActOnForStmt(SourceLocation ForLoc, 2043 SourceLocation LParenLoc, 2044 Stmt *First, FullExprArg Second, 2045 Decl *SecondVar, 2046 FullExprArg Third, 2047 SourceLocation RParenLoc, 2048 Stmt *Body); 2049 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc, 2050 Expr *collection); 2051 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2052 SourceLocation LParenLoc, 2053 Stmt *First, Expr *Second, 2054 SourceLocation RParenLoc, Stmt *Body); 2055 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2056 SourceLocation LParenLoc, Stmt *LoopVar, 2057 SourceLocation ColonLoc, Expr *Collection, 2058 SourceLocation RParenLoc); 2059 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2060 SourceLocation ColonLoc, 2061 Stmt *RangeDecl, Stmt *BeginEndDecl, 2062 Expr *Cond, Expr *Inc, 2063 Stmt *LoopVarDecl, 2064 SourceLocation RParenLoc); 2065 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2066 2067 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2068 SourceLocation LabelLoc, 2069 LabelDecl *TheDecl); 2070 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2071 SourceLocation StarLoc, 2072 Expr *DestExp); 2073 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2074 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2075 2076 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2077 bool AllowFunctionParameters); 2078 2079 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2080 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2081 2082 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2083 bool IsSimple, bool IsVolatile, 2084 unsigned NumOutputs, unsigned NumInputs, 2085 IdentifierInfo **Names, 2086 MultiExprArg Constraints, 2087 MultiExprArg Exprs, 2088 Expr *AsmString, 2089 MultiExprArg Clobbers, 2090 SourceLocation RParenLoc, 2091 bool MSAsm = false); 2092 2093 2094 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2095 SourceLocation StartLoc, 2096 SourceLocation IdLoc, IdentifierInfo *Id, 2097 bool Invalid = false); 2098 2099 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2100 2101 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2102 Decl *Parm, Stmt *Body); 2103 2104 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2105 2106 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2107 MultiStmtArg Catch, Stmt *Finally); 2108 2109 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2110 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2111 Scope *CurScope); 2112 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, 2113 Expr *operand); 2114 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2115 Expr *SynchExpr, 2116 Stmt *SynchBody); 2117 2118 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2119 2120 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2121 SourceLocation StartLoc, 2122 SourceLocation IdLoc, 2123 IdentifierInfo *Id); 2124 2125 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2126 2127 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2128 Decl *ExDecl, Stmt *HandlerBlock); 2129 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2130 MultiStmtArg Handlers); 2131 2132 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2133 SourceLocation TryLoc, 2134 Stmt *TryBlock, 2135 Stmt *Handler); 2136 2137 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2138 Expr *FilterExpr, 2139 Stmt *Block); 2140 2141 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2142 Stmt *Block); 2143 2144 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2145 2146 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2147 2148 /// \brief If it's a file scoped decl that must warn if not used, keep track 2149 /// of it. 2150 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2151 2152 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2153 /// whose result is unused, warn. 2154 void DiagnoseUnusedExprResult(const Stmt *S); 2155 void DiagnoseUnusedDecl(const NamedDecl *ND); 2156 2157 ParsingDeclState PushParsingDeclaration() { 2158 return DelayedDiagnostics.pushParsingDecl(); 2159 } 2160 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2161 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2162 } 2163 2164 typedef ProcessingContextState ParsingClassState; 2165 ParsingClassState PushParsingClass() { 2166 return DelayedDiagnostics.pushContext(); 2167 } 2168 void PopParsingClass(ParsingClassState state) { 2169 DelayedDiagnostics.popContext(state); 2170 } 2171 2172 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2173 SourceLocation Loc, 2174 const ObjCInterfaceDecl *UnknownObjCClass=0); 2175 2176 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2177 2178 bool makeUnavailableInSystemHeader(SourceLocation loc, 2179 StringRef message); 2180 2181 //===--------------------------------------------------------------------===// 2182 // Expression Parsing Callbacks: SemaExpr.cpp. 2183 2184 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2185 const ObjCInterfaceDecl *UnknownObjCClass=0); 2186 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2187 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2188 ObjCMethodDecl *Getter, 2189 SourceLocation Loc); 2190 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2191 Expr **Args, unsigned NumArgs); 2192 2193 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 2194 2195 void PopExpressionEvaluationContext(); 2196 2197 void DiscardCleanupsInEvaluationContext(); 2198 2199 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 2200 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2201 void MarkDeclarationsReferencedInExpr(Expr *E); 2202 2203 /// \brief Figure out if an expression could be turned into a call. 2204 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2205 UnresolvedSetImpl &NonTemplateOverloads); 2206 /// \brief Give notes for a set of overloads. 2207 void NoteOverloads(const UnresolvedSetImpl &Overloads, 2208 const SourceLocation FinalNoteLoc); 2209 2210 /// \brief Conditionally issue a diagnostic based on the current 2211 /// evaluation context. 2212 /// 2213 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2214 /// the function body is parsed, and then do a basic reachability analysis to 2215 /// determine if the statement is reachable. If it is unreachable, the 2216 /// diagnostic will not be emitted. 2217 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *stmt, 2218 const PartialDiagnostic &PD); 2219 2220 // Primary Expressions. 2221 SourceRange getExprRange(Expr *E) const; 2222 2223 ObjCIvarDecl *SynthesizeProvisionalIvar(LookupResult &Lookup, 2224 IdentifierInfo *II, 2225 SourceLocation NameLoc); 2226 2227 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Name, 2228 bool HasTrailingLParen, bool IsAddressOfOperand); 2229 2230 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2231 TemplateArgumentListInfo &Buffer, 2232 DeclarationNameInfo &NameInfo, 2233 const TemplateArgumentListInfo *&TemplateArgs); 2234 2235 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2236 CorrectTypoContext CTC = CTC_Unknown); 2237 2238 ExprResult LookupInObjCMethod(LookupResult &R, Scope *S, IdentifierInfo *II, 2239 bool AllowBuiltinCreation=false); 2240 2241 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2242 const DeclarationNameInfo &NameInfo, 2243 bool isAddressOfOperand, 2244 const TemplateArgumentListInfo *TemplateArgs); 2245 2246 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2247 ExprValueKind VK, 2248 SourceLocation Loc, 2249 const CXXScopeSpec *SS = 0); 2250 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2251 ExprValueKind VK, 2252 const DeclarationNameInfo &NameInfo, 2253 const CXXScopeSpec *SS = 0); 2254 ExprResult 2255 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2256 SourceLocation nameLoc, 2257 IndirectFieldDecl *indirectField, 2258 Expr *baseObjectExpr = 0, 2259 SourceLocation opLoc = SourceLocation()); 2260 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2261 LookupResult &R, 2262 const TemplateArgumentListInfo *TemplateArgs); 2263 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2264 LookupResult &R, 2265 const TemplateArgumentListInfo *TemplateArgs, 2266 bool IsDefiniteInstance); 2267 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2268 const LookupResult &R, 2269 bool HasTrailingLParen); 2270 2271 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2272 const DeclarationNameInfo &NameInfo); 2273 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2274 const DeclarationNameInfo &NameInfo, 2275 const TemplateArgumentListInfo *TemplateArgs); 2276 2277 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2278 LookupResult &R, 2279 bool ADL); 2280 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2281 const DeclarationNameInfo &NameInfo, 2282 NamedDecl *D); 2283 2284 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2285 ExprResult ActOnNumericConstant(const Token &); 2286 ExprResult ActOnCharacterConstant(const Token &); 2287 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *Val); 2288 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2289 SourceLocation R, 2290 MultiExprArg Val); 2291 2292 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2293 /// fragments (e.g. "foo" "bar" L"baz"). 2294 ExprResult ActOnStringLiteral(const Token *Toks, unsigned NumToks); 2295 2296 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2297 SourceLocation DefaultLoc, 2298 SourceLocation RParenLoc, 2299 Expr *ControllingExpr, 2300 MultiTypeArg Types, 2301 MultiExprArg Exprs); 2302 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2303 SourceLocation DefaultLoc, 2304 SourceLocation RParenLoc, 2305 Expr *ControllingExpr, 2306 TypeSourceInfo **Types, 2307 Expr **Exprs, 2308 unsigned NumAssocs); 2309 2310 // Binary/Unary Operators. 'Tok' is the token for the operator. 2311 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2312 Expr *InputArg); 2313 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2314 UnaryOperatorKind Opc, Expr *input); 2315 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2316 tok::TokenKind Op, Expr *Input); 2317 2318 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *T, 2319 SourceLocation OpLoc, 2320 UnaryExprOrTypeTrait ExprKind, 2321 SourceRange R); 2322 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2323 UnaryExprOrTypeTrait ExprKind); 2324 ExprResult 2325 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2326 UnaryExprOrTypeTrait ExprKind, 2327 bool isType, void *TyOrEx, 2328 const SourceRange &ArgRange); 2329 2330 ExprResult CheckPlaceholderExpr(Expr *E); 2331 bool CheckVecStepExpr(Expr *E); 2332 2333 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2334 bool CheckUnaryExprOrTypeTraitOperand(QualType type, SourceLocation OpLoc, 2335 SourceRange R, 2336 UnaryExprOrTypeTrait ExprKind); 2337 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2338 SourceLocation OpLoc, 2339 IdentifierInfo &Name, 2340 SourceLocation NameLoc, 2341 SourceLocation RParenLoc); 2342 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2343 tok::TokenKind Kind, Expr *Input); 2344 2345 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2346 Expr *Idx, SourceLocation RLoc); 2347 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2348 Expr *Idx, SourceLocation RLoc); 2349 2350 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2351 SourceLocation OpLoc, bool IsArrow, 2352 CXXScopeSpec &SS, 2353 NamedDecl *FirstQualifierInScope, 2354 const DeclarationNameInfo &NameInfo, 2355 const TemplateArgumentListInfo *TemplateArgs); 2356 2357 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2358 SourceLocation OpLoc, bool IsArrow, 2359 const CXXScopeSpec &SS, 2360 NamedDecl *FirstQualifierInScope, 2361 LookupResult &R, 2362 const TemplateArgumentListInfo *TemplateArgs, 2363 bool SuppressQualifierCheck = false); 2364 2365 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2366 bool &IsArrow, SourceLocation OpLoc, 2367 CXXScopeSpec &SS, 2368 Decl *ObjCImpDecl, 2369 bool HasTemplateArgs); 2370 2371 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2372 const CXXScopeSpec &SS, 2373 const LookupResult &R); 2374 2375 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2376 bool IsArrow, SourceLocation OpLoc, 2377 const CXXScopeSpec &SS, 2378 NamedDecl *FirstQualifierInScope, 2379 const DeclarationNameInfo &NameInfo, 2380 const TemplateArgumentListInfo *TemplateArgs); 2381 2382 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2383 SourceLocation OpLoc, 2384 tok::TokenKind OpKind, 2385 CXXScopeSpec &SS, 2386 UnqualifiedId &Member, 2387 Decl *ObjCImpDecl, 2388 bool HasTrailingLParen); 2389 2390 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2391 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2392 FunctionDecl *FDecl, 2393 const FunctionProtoType *Proto, 2394 Expr **Args, unsigned NumArgs, 2395 SourceLocation RParenLoc); 2396 2397 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2398 /// This provides the location of the left/right parens and a list of comma 2399 /// locations. 2400 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2401 MultiExprArg Args, SourceLocation RParenLoc, 2402 Expr *ExecConfig = 0); 2403 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2404 SourceLocation LParenLoc, 2405 Expr **Args, unsigned NumArgs, 2406 SourceLocation RParenLoc, 2407 Expr *ExecConfig = 0); 2408 2409 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2410 MultiExprArg ExecConfig, SourceLocation GGGLoc); 2411 2412 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2413 Declarator &D, ParsedType &Ty, 2414 SourceLocation RParenLoc, Expr *Op); 2415 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2416 TypeSourceInfo *Ty, 2417 SourceLocation RParenLoc, 2418 Expr *Op); 2419 2420 /// \brief Build an altivec or OpenCL literal. 2421 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2422 SourceLocation RParenLoc, Expr *E, 2423 TypeSourceInfo *TInfo); 2424 2425 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2426 2427 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2428 ParsedType Ty, 2429 SourceLocation RParenLoc, 2430 Expr *Op); 2431 2432 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2433 TypeSourceInfo *TInfo, 2434 SourceLocation RParenLoc, 2435 Expr *InitExpr); 2436 2437 ExprResult ActOnInitList(SourceLocation LParenLoc, 2438 MultiExprArg InitList, 2439 SourceLocation RParenLoc); 2440 2441 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2442 SourceLocation Loc, 2443 bool GNUSyntax, 2444 ExprResult Init); 2445 2446 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2447 tok::TokenKind Kind, Expr *LHS, Expr *RHS); 2448 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2449 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2450 ExprResult CreateBuiltinBinOp(SourceLocation TokLoc, 2451 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2452 2453 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2454 /// in the case of a the GNU conditional expr extension. 2455 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2456 SourceLocation ColonLoc, 2457 Expr *Cond, Expr *LHS, Expr *RHS); 2458 2459 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2460 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2461 LabelDecl *LD); 2462 2463 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2464 SourceLocation RPLoc); // "({..})" 2465 2466 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2467 struct OffsetOfComponent { 2468 SourceLocation LocStart, LocEnd; 2469 bool isBrackets; // true if [expr], false if .ident 2470 union { 2471 IdentifierInfo *IdentInfo; 2472 ExprTy *E; 2473 } U; 2474 }; 2475 2476 /// __builtin_offsetof(type, a.b[123][456].c) 2477 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2478 TypeSourceInfo *TInfo, 2479 OffsetOfComponent *CompPtr, 2480 unsigned NumComponents, 2481 SourceLocation RParenLoc); 2482 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2483 SourceLocation BuiltinLoc, 2484 SourceLocation TypeLoc, 2485 ParsedType Arg1, 2486 OffsetOfComponent *CompPtr, 2487 unsigned NumComponents, 2488 SourceLocation RParenLoc); 2489 2490 // __builtin_choose_expr(constExpr, expr1, expr2) 2491 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2492 Expr *cond, Expr *expr1, 2493 Expr *expr2, SourceLocation RPLoc); 2494 2495 // __builtin_va_arg(expr, type) 2496 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, 2497 Expr *expr, ParsedType type, 2498 SourceLocation RPLoc); 2499 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, 2500 Expr *expr, TypeSourceInfo *TInfo, 2501 SourceLocation RPLoc); 2502 2503 // __null 2504 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2505 2506 bool CheckCaseExpression(Expr *expr); 2507 2508 bool CheckMicrosoftIfExistsSymbol(CXXScopeSpec &SS, UnqualifiedId &Name); 2509 2510 //===------------------------- "Block" Extension ------------------------===// 2511 2512 /// ActOnBlockStart - This callback is invoked when a block literal is 2513 /// started. 2514 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2515 2516 /// ActOnBlockArguments - This callback allows processing of block arguments. 2517 /// If there are no arguments, this is still invoked. 2518 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2519 2520 /// ActOnBlockError - If there is an error parsing a block, this callback 2521 /// is invoked to pop the information about the block from the action impl. 2522 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2523 2524 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2525 /// literal was successfully completed. ^(int x){...} 2526 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, 2527 Stmt *Body, Scope *CurScope); 2528 2529 //===---------------------------- OpenCL Features -----------------------===// 2530 2531 /// __builtin_astype(...) 2532 ExprResult ActOnAsTypeExpr(Expr *expr, ParsedType DestTy, 2533 SourceLocation BuiltinLoc, 2534 SourceLocation RParenLoc); 2535 2536 //===---------------------------- C++ Features --------------------------===// 2537 2538 // Act on C++ namespaces 2539 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2540 SourceLocation NamespaceLoc, 2541 SourceLocation IdentLoc, 2542 IdentifierInfo *Ident, 2543 SourceLocation LBrace, 2544 AttributeList *AttrList); 2545 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2546 2547 NamespaceDecl *getStdNamespace() const; 2548 NamespaceDecl *getOrCreateStdNamespace(); 2549 2550 CXXRecordDecl *getStdBadAlloc() const; 2551 2552 Decl *ActOnUsingDirective(Scope *CurScope, 2553 SourceLocation UsingLoc, 2554 SourceLocation NamespcLoc, 2555 CXXScopeSpec &SS, 2556 SourceLocation IdentLoc, 2557 IdentifierInfo *NamespcName, 2558 AttributeList *AttrList); 2559 2560 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2561 2562 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2563 SourceLocation NamespaceLoc, 2564 SourceLocation AliasLoc, 2565 IdentifierInfo *Alias, 2566 CXXScopeSpec &SS, 2567 SourceLocation IdentLoc, 2568 IdentifierInfo *Ident); 2569 2570 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2571 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2572 const LookupResult &PreviousDecls); 2573 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2574 NamedDecl *Target); 2575 2576 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2577 bool isTypeName, 2578 const CXXScopeSpec &SS, 2579 SourceLocation NameLoc, 2580 const LookupResult &Previous); 2581 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2582 const CXXScopeSpec &SS, 2583 SourceLocation NameLoc); 2584 2585 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2586 SourceLocation UsingLoc, 2587 CXXScopeSpec &SS, 2588 const DeclarationNameInfo &NameInfo, 2589 AttributeList *AttrList, 2590 bool IsInstantiation, 2591 bool IsTypeName, 2592 SourceLocation TypenameLoc); 2593 2594 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2595 2596 Decl *ActOnUsingDeclaration(Scope *CurScope, 2597 AccessSpecifier AS, 2598 bool HasUsingKeyword, 2599 SourceLocation UsingLoc, 2600 CXXScopeSpec &SS, 2601 UnqualifiedId &Name, 2602 AttributeList *AttrList, 2603 bool IsTypeName, 2604 SourceLocation TypenameLoc); 2605 Decl *ActOnAliasDeclaration(Scope *CurScope, 2606 AccessSpecifier AS, 2607 MultiTemplateParamsArg TemplateParams, 2608 SourceLocation UsingLoc, 2609 UnqualifiedId &Name, 2610 TypeResult Type); 2611 2612 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2613 /// ActOnDeclarator, when a C++ direct initializer is present. 2614 /// e.g: "int x(1);" 2615 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2616 SourceLocation LParenLoc, 2617 MultiExprArg Exprs, 2618 SourceLocation RParenLoc, 2619 bool TypeMayContainAuto); 2620 2621 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2622 /// and sets it as the initializer for the the passed in VarDecl. 2623 bool InitializeVarWithConstructor(VarDecl *VD, 2624 CXXConstructorDecl *Constructor, 2625 MultiExprArg Exprs); 2626 2627 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2628 /// including handling of its default argument expressions. 2629 /// 2630 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2631 ExprResult 2632 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2633 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2634 bool RequiresZeroInit, unsigned ConstructKind, 2635 SourceRange ParenRange); 2636 2637 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2638 // the constructor can be elidable? 2639 ExprResult 2640 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2641 CXXConstructorDecl *Constructor, bool Elidable, 2642 MultiExprArg Exprs, bool RequiresZeroInit, 2643 unsigned ConstructKind, 2644 SourceRange ParenRange); 2645 2646 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2647 /// the default expr if needed. 2648 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2649 FunctionDecl *FD, 2650 ParmVarDecl *Param); 2651 2652 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2653 /// constructed variable. 2654 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2655 2656 /// \brief Helper class that collects exception specifications for 2657 /// implicitly-declared special member functions. 2658 class ImplicitExceptionSpecification { 2659 // Pointer to allow copying 2660 ASTContext *Context; 2661 // We order exception specifications thus: 2662 // noexcept is the most restrictive, but is only used in C++0x. 2663 // throw() comes next. 2664 // Then a throw(collected exceptions) 2665 // Finally no specification. 2666 // throw(...) is used instead if any called function uses it. 2667 // 2668 // If this exception specification cannot be known yet (for instance, 2669 // because this is the exception specification for a defaulted default 2670 // constructor and we haven't finished parsing the deferred parts of the 2671 // class yet), the C++0x standard does not specify how to behave. We 2672 // record this as an 'unknown' exception specification, which overrules 2673 // any other specification (even 'none', to keep this rule simple). 2674 ExceptionSpecificationType ComputedEST; 2675 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2676 SmallVector<QualType, 4> Exceptions; 2677 2678 void ClearExceptions() { 2679 ExceptionsSeen.clear(); 2680 Exceptions.clear(); 2681 } 2682 2683 public: 2684 explicit ImplicitExceptionSpecification(ASTContext &Context) 2685 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2686 if (!Context.getLangOptions().CPlusPlus0x) 2687 ComputedEST = EST_DynamicNone; 2688 } 2689 2690 /// \brief Get the computed exception specification type. 2691 ExceptionSpecificationType getExceptionSpecType() const { 2692 assert(ComputedEST != EST_ComputedNoexcept && 2693 "noexcept(expr) should not be a possible result"); 2694 return ComputedEST; 2695 } 2696 2697 /// \brief The number of exceptions in the exception specification. 2698 unsigned size() const { return Exceptions.size(); } 2699 2700 /// \brief The set of exceptions in the exception specification. 2701 const QualType *data() const { return Exceptions.data(); } 2702 2703 /// \brief Integrate another called method into the collected data. 2704 void CalledDecl(CXXMethodDecl *Method); 2705 2706 /// \brief Integrate an invoked expression into the collected data. 2707 void CalledExpr(Expr *E); 2708 2709 /// \brief Specify that the exception specification can't be detemined yet. 2710 void SetDelayed() { 2711 ClearExceptions(); 2712 ComputedEST = EST_Delayed; 2713 } 2714 2715 FunctionProtoType::ExtProtoInfo getEPI() const { 2716 FunctionProtoType::ExtProtoInfo EPI; 2717 EPI.ExceptionSpecType = getExceptionSpecType(); 2718 EPI.NumExceptions = size(); 2719 EPI.Exceptions = data(); 2720 return EPI; 2721 } 2722 }; 2723 2724 /// \brief Determine what sort of exception specification a defaulted 2725 /// copy constructor of a class will have. 2726 ImplicitExceptionSpecification 2727 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2728 2729 /// \brief Determine what sort of exception specification a defaulted 2730 /// default constructor of a class will have, and whether the parameter 2731 /// will be const. 2732 std::pair<ImplicitExceptionSpecification, bool> 2733 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2734 2735 /// \brief Determine what sort of exception specification a defautled 2736 /// copy assignment operator of a class will have, and whether the 2737 /// parameter will be const. 2738 std::pair<ImplicitExceptionSpecification, bool> 2739 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2740 2741 /// \brief Determine what sort of exception specification a defaulted 2742 /// destructor of a class will have. 2743 ImplicitExceptionSpecification 2744 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 2745 2746 /// \brief Determine if a defaulted default constructor ought to be 2747 /// deleted. 2748 bool ShouldDeleteDefaultConstructor(CXXConstructorDecl *CD); 2749 2750 /// \brief Determine if a defaulted copy constructor ought to be 2751 /// deleted. 2752 bool ShouldDeleteCopyConstructor(CXXConstructorDecl *CD); 2753 2754 /// \brief Determine if a defaulted copy assignment operator ought to be 2755 /// deleted. 2756 bool ShouldDeleteCopyAssignmentOperator(CXXMethodDecl *MD); 2757 2758 /// \brief Determine if a defaulted destructor ought to be deleted. 2759 bool ShouldDeleteDestructor(CXXDestructorDecl *DD); 2760 2761 /// \brief Declare the implicit default constructor for the given class. 2762 /// 2763 /// \param ClassDecl The class declaration into which the implicit 2764 /// default constructor will be added. 2765 /// 2766 /// \returns The implicitly-declared default constructor. 2767 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2768 CXXRecordDecl *ClassDecl); 2769 2770 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2771 /// defining this constructor as the default constructor. 2772 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2773 CXXConstructorDecl *Constructor); 2774 2775 /// \brief Declare the implicit destructor for the given class. 2776 /// 2777 /// \param ClassDecl The class declaration into which the implicit 2778 /// destructor will be added. 2779 /// 2780 /// \returns The implicitly-declared destructor. 2781 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2782 2783 /// DefineImplicitDestructor - Checks for feasibility of 2784 /// defining this destructor as the default destructor. 2785 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2786 CXXDestructorDecl *Destructor); 2787 2788 /// \brief Build an exception spec for destructors that don't have one. 2789 /// 2790 /// C++11 says that user-defined destructors with no exception spec get one 2791 /// that looks as if the destructor was implicitly declared. 2792 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 2793 CXXDestructorDecl *Destructor); 2794 2795 /// \brief Declare all inherited constructors for the given class. 2796 /// 2797 /// \param ClassDecl The class declaration into which the inherited 2798 /// constructors will be added. 2799 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2800 2801 /// \brief Declare the implicit copy constructor for the given class. 2802 /// 2803 /// \param S The scope of the class, which may be NULL if this is a 2804 /// template instantiation. 2805 /// 2806 /// \param ClassDecl The class declaration into which the implicit 2807 /// copy constructor will be added. 2808 /// 2809 /// \returns The implicitly-declared copy constructor. 2810 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2811 2812 /// DefineImplicitCopyConstructor - Checks for feasibility of 2813 /// defining this constructor as the copy constructor. 2814 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2815 CXXConstructorDecl *Constructor); 2816 2817 /// \brief Declare the implicit copy assignment operator for the given class. 2818 /// 2819 /// \param S The scope of the class, which may be NULL if this is a 2820 /// template instantiation. 2821 /// 2822 /// \param ClassDecl The class declaration into which the implicit 2823 /// copy-assignment operator will be added. 2824 /// 2825 /// \returns The implicitly-declared copy assignment operator. 2826 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2827 2828 /// \brief Defined an implicitly-declared copy assignment operator. 2829 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2830 CXXMethodDecl *MethodDecl); 2831 2832 /// \brief Force the declaration of any implicitly-declared members of this 2833 /// class. 2834 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2835 2836 /// MaybeBindToTemporary - If the passed in expression has a record type with 2837 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 2838 /// it simply returns the passed in expression. 2839 ExprResult MaybeBindToTemporary(Expr *E); 2840 2841 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 2842 MultiExprArg ArgsPtr, 2843 SourceLocation Loc, 2844 ASTOwningVector<Expr*> &ConvertedArgs); 2845 2846 ParsedType getDestructorName(SourceLocation TildeLoc, 2847 IdentifierInfo &II, SourceLocation NameLoc, 2848 Scope *S, CXXScopeSpec &SS, 2849 ParsedType ObjectType, 2850 bool EnteringContext); 2851 2852 // Checks that reinterpret casts don't have undefined behavior. 2853 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 2854 bool IsDereference, SourceRange Range); 2855 2856 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 2857 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 2858 tok::TokenKind Kind, 2859 SourceLocation LAngleBracketLoc, 2860 Declarator &D, 2861 SourceLocation RAngleBracketLoc, 2862 SourceLocation LParenLoc, 2863 Expr *E, 2864 SourceLocation RParenLoc); 2865 2866 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 2867 tok::TokenKind Kind, 2868 TypeSourceInfo *Ty, 2869 Expr *E, 2870 SourceRange AngleBrackets, 2871 SourceRange Parens); 2872 2873 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2874 SourceLocation TypeidLoc, 2875 TypeSourceInfo *Operand, 2876 SourceLocation RParenLoc); 2877 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2878 SourceLocation TypeidLoc, 2879 Expr *Operand, 2880 SourceLocation RParenLoc); 2881 2882 /// ActOnCXXTypeid - Parse typeid( something ). 2883 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 2884 SourceLocation LParenLoc, bool isType, 2885 void *TyOrExpr, 2886 SourceLocation RParenLoc); 2887 2888 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2889 SourceLocation TypeidLoc, 2890 TypeSourceInfo *Operand, 2891 SourceLocation RParenLoc); 2892 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2893 SourceLocation TypeidLoc, 2894 Expr *Operand, 2895 SourceLocation RParenLoc); 2896 2897 /// ActOnCXXUuidof - Parse __uuidof( something ). 2898 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 2899 SourceLocation LParenLoc, bool isType, 2900 void *TyOrExpr, 2901 SourceLocation RParenLoc); 2902 2903 2904 //// ActOnCXXThis - Parse 'this' pointer. 2905 ExprResult ActOnCXXThis(SourceLocation loc); 2906 2907 /// getAndCaptureCurrentThisType - Try to capture a 'this' pointer. Returns 2908 /// the type of the 'this' pointer, or a null type if this is not possible. 2909 QualType getAndCaptureCurrentThisType(); 2910 2911 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 2912 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 2913 2914 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 2915 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 2916 2917 //// ActOnCXXThrow - Parse throw expressions. 2918 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 2919 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 2920 bool IsThrownVarInScope); 2921 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 2922 bool IsThrownVarInScope); 2923 2924 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 2925 /// Can be interpreted either as function-style casting ("int(x)") 2926 /// or class type construction ("ClassType(x,y,z)") 2927 /// or creation of a value-initialized type ("int()"). 2928 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 2929 SourceLocation LParenLoc, 2930 MultiExprArg Exprs, 2931 SourceLocation RParenLoc); 2932 2933 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 2934 SourceLocation LParenLoc, 2935 MultiExprArg Exprs, 2936 SourceLocation RParenLoc); 2937 2938 /// ActOnCXXNew - Parsed a C++ 'new' expression. 2939 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 2940 SourceLocation PlacementLParen, 2941 MultiExprArg PlacementArgs, 2942 SourceLocation PlacementRParen, 2943 SourceRange TypeIdParens, Declarator &D, 2944 SourceLocation ConstructorLParen, 2945 MultiExprArg ConstructorArgs, 2946 SourceLocation ConstructorRParen); 2947 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 2948 SourceLocation PlacementLParen, 2949 MultiExprArg PlacementArgs, 2950 SourceLocation PlacementRParen, 2951 SourceRange TypeIdParens, 2952 QualType AllocType, 2953 TypeSourceInfo *AllocTypeInfo, 2954 Expr *ArraySize, 2955 SourceLocation ConstructorLParen, 2956 MultiExprArg ConstructorArgs, 2957 SourceLocation ConstructorRParen, 2958 bool TypeMayContainAuto = true); 2959 2960 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 2961 SourceRange R); 2962 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 2963 bool UseGlobal, QualType AllocType, bool IsArray, 2964 Expr **PlaceArgs, unsigned NumPlaceArgs, 2965 FunctionDecl *&OperatorNew, 2966 FunctionDecl *&OperatorDelete); 2967 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 2968 DeclarationName Name, Expr** Args, 2969 unsigned NumArgs, DeclContext *Ctx, 2970 bool AllowMissing, FunctionDecl *&Operator, 2971 bool Diagnose = true); 2972 void DeclareGlobalNewDelete(); 2973 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 2974 QualType Argument, 2975 bool addMallocAttr = false); 2976 2977 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 2978 DeclarationName Name, FunctionDecl* &Operator, 2979 bool Diagnose = true); 2980 2981 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 2982 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 2983 bool UseGlobal, bool ArrayForm, 2984 Expr *Operand); 2985 2986 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 2987 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 2988 SourceLocation StmtLoc, 2989 bool ConvertToBoolean); 2990 2991 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 2992 Expr *Operand, SourceLocation RParen); 2993 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 2994 SourceLocation RParen); 2995 2996 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 2997 /// pseudo-functions. 2998 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 2999 SourceLocation KWLoc, 3000 ParsedType Ty, 3001 SourceLocation RParen); 3002 3003 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3004 SourceLocation KWLoc, 3005 TypeSourceInfo *T, 3006 SourceLocation RParen); 3007 3008 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3009 /// pseudo-functions. 3010 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3011 SourceLocation KWLoc, 3012 ParsedType LhsTy, 3013 ParsedType RhsTy, 3014 SourceLocation RParen); 3015 3016 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3017 SourceLocation KWLoc, 3018 TypeSourceInfo *LhsT, 3019 TypeSourceInfo *RhsT, 3020 SourceLocation RParen); 3021 3022 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3023 /// pseudo-functions. 3024 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3025 SourceLocation KWLoc, 3026 ParsedType LhsTy, 3027 Expr *DimExpr, 3028 SourceLocation RParen); 3029 3030 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3031 SourceLocation KWLoc, 3032 TypeSourceInfo *TSInfo, 3033 Expr *DimExpr, 3034 SourceLocation RParen); 3035 3036 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3037 /// pseudo-functions. 3038 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3039 SourceLocation KWLoc, 3040 Expr *Queried, 3041 SourceLocation RParen); 3042 3043 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3044 SourceLocation KWLoc, 3045 Expr *Queried, 3046 SourceLocation RParen); 3047 3048 ExprResult ActOnStartCXXMemberReference(Scope *S, 3049 Expr *Base, 3050 SourceLocation OpLoc, 3051 tok::TokenKind OpKind, 3052 ParsedType &ObjectType, 3053 bool &MayBePseudoDestructor); 3054 3055 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3056 3057 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3058 SourceLocation OpLoc, 3059 tok::TokenKind OpKind, 3060 const CXXScopeSpec &SS, 3061 TypeSourceInfo *ScopeType, 3062 SourceLocation CCLoc, 3063 SourceLocation TildeLoc, 3064 PseudoDestructorTypeStorage DestroyedType, 3065 bool HasTrailingLParen); 3066 3067 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3068 SourceLocation OpLoc, 3069 tok::TokenKind OpKind, 3070 CXXScopeSpec &SS, 3071 UnqualifiedId &FirstTypeName, 3072 SourceLocation CCLoc, 3073 SourceLocation TildeLoc, 3074 UnqualifiedId &SecondTypeName, 3075 bool HasTrailingLParen); 3076 3077 /// MaybeCreateExprWithCleanups - If the current full-expression 3078 /// requires any cleanups, surround it with a ExprWithCleanups node. 3079 /// Otherwise, just returns the passed-in expression. 3080 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3081 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3082 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3083 3084 ExprResult ActOnFinishFullExpr(Expr *Expr); 3085 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3086 3087 // Marks SS invalid if it represents an incomplete type. 3088 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3089 3090 DeclContext *computeDeclContext(QualType T); 3091 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3092 bool EnteringContext = false); 3093 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3094 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3095 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3096 3097 /// \brief The parser has parsed a global nested-name-specifier '::'. 3098 /// 3099 /// \param S The scope in which this nested-name-specifier occurs. 3100 /// 3101 /// \param CCLoc The location of the '::'. 3102 /// 3103 /// \param SS The nested-name-specifier, which will be updated in-place 3104 /// to reflect the parsed nested-name-specifier. 3105 /// 3106 /// \returns true if an error occurred, false otherwise. 3107 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3108 CXXScopeSpec &SS); 3109 3110 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3111 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3112 3113 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3114 SourceLocation IdLoc, 3115 IdentifierInfo &II, 3116 ParsedType ObjectType); 3117 3118 bool BuildCXXNestedNameSpecifier(Scope *S, 3119 IdentifierInfo &Identifier, 3120 SourceLocation IdentifierLoc, 3121 SourceLocation CCLoc, 3122 QualType ObjectType, 3123 bool EnteringContext, 3124 CXXScopeSpec &SS, 3125 NamedDecl *ScopeLookupResult, 3126 bool ErrorRecoveryLookup); 3127 3128 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3129 /// 3130 /// \param S The scope in which this nested-name-specifier occurs. 3131 /// 3132 /// \param Identifier The identifier preceding the '::'. 3133 /// 3134 /// \param IdentifierLoc The location of the identifier. 3135 /// 3136 /// \param CCLoc The location of the '::'. 3137 /// 3138 /// \param ObjectType The type of the object, if we're parsing 3139 /// nested-name-specifier in a member access expression. 3140 /// 3141 /// \param EnteringContext Whether we're entering the context nominated by 3142 /// this nested-name-specifier. 3143 /// 3144 /// \param SS The nested-name-specifier, which is both an input 3145 /// parameter (the nested-name-specifier before this type) and an 3146 /// output parameter (containing the full nested-name-specifier, 3147 /// including this new type). 3148 /// 3149 /// \returns true if an error occurred, false otherwise. 3150 bool ActOnCXXNestedNameSpecifier(Scope *S, 3151 IdentifierInfo &Identifier, 3152 SourceLocation IdentifierLoc, 3153 SourceLocation CCLoc, 3154 ParsedType ObjectType, 3155 bool EnteringContext, 3156 CXXScopeSpec &SS); 3157 3158 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3159 IdentifierInfo &Identifier, 3160 SourceLocation IdentifierLoc, 3161 SourceLocation ColonLoc, 3162 ParsedType ObjectType, 3163 bool EnteringContext); 3164 3165 /// \brief The parser has parsed a nested-name-specifier 3166 /// 'template[opt] template-name < template-args >::'. 3167 /// 3168 /// \param S The scope in which this nested-name-specifier occurs. 3169 /// 3170 /// \param TemplateLoc The location of the 'template' keyword, if any. 3171 /// 3172 /// \param SS The nested-name-specifier, which is both an input 3173 /// parameter (the nested-name-specifier before this type) and an 3174 /// output parameter (containing the full nested-name-specifier, 3175 /// including this new type). 3176 /// 3177 /// \param TemplateLoc the location of the 'template' keyword, if any. 3178 /// \param TemplateName The template name. 3179 /// \param TemplateNameLoc The location of the template name. 3180 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3181 /// \param TemplateArgs The template arguments. 3182 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3183 /// \param CCLoc The location of the '::'. 3184 3185 /// \param EnteringContext Whether we're entering the context of the 3186 /// nested-name-specifier. 3187 /// 3188 /// 3189 /// \returns true if an error occurred, false otherwise. 3190 bool ActOnCXXNestedNameSpecifier(Scope *S, 3191 SourceLocation TemplateLoc, 3192 CXXScopeSpec &SS, 3193 TemplateTy Template, 3194 SourceLocation TemplateNameLoc, 3195 SourceLocation LAngleLoc, 3196 ASTTemplateArgsPtr TemplateArgs, 3197 SourceLocation RAngleLoc, 3198 SourceLocation CCLoc, 3199 bool EnteringContext); 3200 3201 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3202 /// that the parser can use later to reconstruct the given 3203 /// nested-name-specifier. 3204 /// 3205 /// \param SS A nested-name-specifier. 3206 /// 3207 /// \returns A pointer containing all of the information in the 3208 /// nested-name-specifier \p SS. 3209 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3210 3211 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3212 /// the nested-name-specifier structure. 3213 /// 3214 /// \param Annotation The annotation pointer, produced by 3215 /// \c SaveNestedNameSpecifierAnnotation(). 3216 /// 3217 /// \param AnnotationRange The source range corresponding to the annotation. 3218 /// 3219 /// \param SS The nested-name-specifier that will be updated with the contents 3220 /// of the annotation pointer. 3221 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3222 SourceRange AnnotationRange, 3223 CXXScopeSpec &SS); 3224 3225 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3226 3227 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3228 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3229 /// After this method is called, according to [C++ 3.4.3p3], names should be 3230 /// looked up in the declarator-id's scope, until the declarator is parsed and 3231 /// ActOnCXXExitDeclaratorScope is called. 3232 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3233 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3234 3235 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3236 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3237 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3238 /// Used to indicate that names should revert to being looked up in the 3239 /// defining scope. 3240 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3241 3242 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3243 /// initializer for the declaration 'Dcl'. 3244 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3245 /// static data member of class X, names should be looked up in the scope of 3246 /// class X. 3247 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3248 3249 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3250 /// initializer for the declaration 'Dcl'. 3251 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3252 3253 // ParseObjCStringLiteral - Parse Objective-C string literals. 3254 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3255 Expr **Strings, 3256 unsigned NumStrings); 3257 3258 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3259 TypeSourceInfo *EncodedTypeInfo, 3260 SourceLocation RParenLoc); 3261 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3262 CXXMethodDecl *Method); 3263 3264 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3265 SourceLocation EncodeLoc, 3266 SourceLocation LParenLoc, 3267 ParsedType Ty, 3268 SourceLocation RParenLoc); 3269 3270 // ParseObjCSelectorExpression - Build selector expression for @selector 3271 ExprResult ParseObjCSelectorExpression(Selector Sel, 3272 SourceLocation AtLoc, 3273 SourceLocation SelLoc, 3274 SourceLocation LParenLoc, 3275 SourceLocation RParenLoc); 3276 3277 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3278 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3279 SourceLocation AtLoc, 3280 SourceLocation ProtoLoc, 3281 SourceLocation LParenLoc, 3282 SourceLocation RParenLoc); 3283 3284 //===--------------------------------------------------------------------===// 3285 // C++ Declarations 3286 // 3287 Decl *ActOnStartLinkageSpecification(Scope *S, 3288 SourceLocation ExternLoc, 3289 SourceLocation LangLoc, 3290 StringRef Lang, 3291 SourceLocation LBraceLoc); 3292 Decl *ActOnFinishLinkageSpecification(Scope *S, 3293 Decl *LinkageSpec, 3294 SourceLocation RBraceLoc); 3295 3296 3297 //===--------------------------------------------------------------------===// 3298 // C++ Classes 3299 // 3300 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3301 const CXXScopeSpec *SS = 0); 3302 3303 Decl *ActOnAccessSpecifier(AccessSpecifier Access, 3304 SourceLocation ASLoc, 3305 SourceLocation ColonLoc); 3306 3307 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3308 Declarator &D, 3309 MultiTemplateParamsArg TemplateParameterLists, 3310 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3311 Expr *Init, bool HasDeferredInit, 3312 bool IsDefinition); 3313 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3314 Expr *Init); 3315 3316 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3317 Scope *S, 3318 CXXScopeSpec &SS, 3319 IdentifierInfo *MemberOrBase, 3320 ParsedType TemplateTypeTy, 3321 SourceLocation IdLoc, 3322 SourceLocation LParenLoc, 3323 Expr **Args, unsigned NumArgs, 3324 SourceLocation RParenLoc, 3325 SourceLocation EllipsisLoc); 3326 3327 MemInitResult BuildMemberInitializer(ValueDecl *Member, Expr **Args, 3328 unsigned NumArgs, SourceLocation IdLoc, 3329 SourceLocation LParenLoc, 3330 SourceLocation RParenLoc); 3331 3332 MemInitResult BuildBaseInitializer(QualType BaseType, 3333 TypeSourceInfo *BaseTInfo, 3334 Expr **Args, unsigned NumArgs, 3335 SourceLocation LParenLoc, 3336 SourceLocation RParenLoc, 3337 CXXRecordDecl *ClassDecl, 3338 SourceLocation EllipsisLoc); 3339 3340 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3341 Expr **Args, unsigned NumArgs, 3342 SourceLocation BaseLoc, 3343 SourceLocation RParenLoc, 3344 SourceLocation LParenLoc, 3345 CXXRecordDecl *ClassDecl); 3346 3347 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3348 CXXCtorInitializer *Initializer); 3349 3350 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3351 CXXCtorInitializer **Initializers, 3352 unsigned NumInitializers, bool AnyErrors); 3353 3354 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3355 3356 3357 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3358 /// mark all the non-trivial destructors of its members and bases as 3359 /// referenced. 3360 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3361 CXXRecordDecl *Record); 3362 3363 /// \brief The list of classes whose vtables have been used within 3364 /// this translation unit, and the source locations at which the 3365 /// first use occurred. 3366 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3367 3368 /// \brief The list of vtables that are required but have not yet been 3369 /// materialized. 3370 SmallVector<VTableUse, 16> VTableUses; 3371 3372 /// \brief The set of classes whose vtables have been used within 3373 /// this translation unit, and a bit that will be true if the vtable is 3374 /// required to be emitted (otherwise, it should be emitted only if needed 3375 /// by code generation). 3376 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3377 3378 /// \brief A list of all of the dynamic classes in this translation 3379 /// unit. 3380 SmallVector<CXXRecordDecl *, 16> DynamicClasses; 3381 3382 /// \brief Note that the vtable for the given class was used at the 3383 /// given location. 3384 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3385 bool DefinitionRequired = false); 3386 3387 /// MarkVirtualMembersReferenced - Will mark all members of the given 3388 /// CXXRecordDecl referenced. 3389 void MarkVirtualMembersReferenced(SourceLocation Loc, 3390 const CXXRecordDecl *RD); 3391 3392 /// \brief Define all of the vtables that have been used in this 3393 /// translation unit and reference any virtual members used by those 3394 /// vtables. 3395 /// 3396 /// \returns true if any work was done, false otherwise. 3397 bool DefineUsedVTables(); 3398 3399 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3400 3401 void ActOnMemInitializers(Decl *ConstructorDecl, 3402 SourceLocation ColonLoc, 3403 MemInitTy **MemInits, unsigned NumMemInits, 3404 bool AnyErrors); 3405 3406 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3407 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3408 Decl *TagDecl, 3409 SourceLocation LBrac, 3410 SourceLocation RBrac, 3411 AttributeList *AttrList); 3412 3413 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3414 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3415 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3416 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3417 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3418 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3419 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3420 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3421 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3422 bool IsInsideALocalClassWithinATemplateFunction(); 3423 3424 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3425 Expr *AssertExpr, 3426 Expr *AssertMessageExpr, 3427 SourceLocation RParenLoc); 3428 3429 FriendDecl *CheckFriendTypeDecl(SourceLocation FriendLoc, 3430 TypeSourceInfo *TSInfo); 3431 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3432 MultiTemplateParamsArg TemplateParams); 3433 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, bool IsDefinition, 3434 MultiTemplateParamsArg TemplateParams); 3435 3436 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3437 StorageClass& SC); 3438 void CheckConstructor(CXXConstructorDecl *Constructor); 3439 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3440 StorageClass& SC); 3441 bool CheckDestructor(CXXDestructorDecl *Destructor); 3442 void CheckConversionDeclarator(Declarator &D, QualType &R, 3443 StorageClass& SC); 3444 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3445 3446 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3447 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3448 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3449 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3450 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3451 3452 //===--------------------------------------------------------------------===// 3453 // C++ Derived Classes 3454 // 3455 3456 /// ActOnBaseSpecifier - Parsed a base specifier 3457 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3458 SourceRange SpecifierRange, 3459 bool Virtual, AccessSpecifier Access, 3460 TypeSourceInfo *TInfo, 3461 SourceLocation EllipsisLoc); 3462 3463 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3464 SourceRange SpecifierRange, 3465 bool Virtual, AccessSpecifier Access, 3466 ParsedType basetype, 3467 SourceLocation BaseLoc, 3468 SourceLocation EllipsisLoc); 3469 3470 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3471 unsigned NumBases); 3472 void ActOnBaseSpecifiers(Decl *ClassDecl, BaseTy **Bases, unsigned NumBases); 3473 3474 bool IsDerivedFrom(QualType Derived, QualType Base); 3475 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3476 3477 // FIXME: I don't like this name. 3478 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3479 3480 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3481 3482 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3483 SourceLocation Loc, SourceRange Range, 3484 CXXCastPath *BasePath = 0, 3485 bool IgnoreAccess = false); 3486 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3487 unsigned InaccessibleBaseID, 3488 unsigned AmbigiousBaseConvID, 3489 SourceLocation Loc, SourceRange Range, 3490 DeclarationName Name, 3491 CXXCastPath *BasePath); 3492 3493 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3494 3495 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3496 /// covariant, according to C++ [class.virtual]p5. 3497 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3498 const CXXMethodDecl *Old); 3499 3500 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3501 /// spec is a subset of base spec. 3502 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3503 const CXXMethodDecl *Old); 3504 3505 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3506 3507 /// CheckOverrideControl - Check C++0x override control semantics. 3508 void CheckOverrideControl(const Decl *D); 3509 3510 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3511 /// overrides a virtual member function marked 'final', according to 3512 /// C++0x [class.virtual]p3. 3513 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3514 const CXXMethodDecl *Old); 3515 3516 3517 //===--------------------------------------------------------------------===// 3518 // C++ Access Control 3519 // 3520 3521 enum AccessResult { 3522 AR_accessible, 3523 AR_inaccessible, 3524 AR_dependent, 3525 AR_delayed 3526 }; 3527 3528 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3529 NamedDecl *PrevMemberDecl, 3530 AccessSpecifier LexicalAS); 3531 3532 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3533 DeclAccessPair FoundDecl); 3534 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3535 DeclAccessPair FoundDecl); 3536 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3537 SourceRange PlacementRange, 3538 CXXRecordDecl *NamingClass, 3539 DeclAccessPair FoundDecl, 3540 bool Diagnose = true); 3541 AccessResult CheckConstructorAccess(SourceLocation Loc, 3542 CXXConstructorDecl *D, 3543 const InitializedEntity &Entity, 3544 AccessSpecifier Access, 3545 bool IsCopyBindingRefToTemp = false); 3546 AccessResult CheckConstructorAccess(SourceLocation Loc, 3547 CXXConstructorDecl *D, 3548 AccessSpecifier Access, 3549 PartialDiagnostic PD); 3550 AccessResult CheckDestructorAccess(SourceLocation Loc, 3551 CXXDestructorDecl *Dtor, 3552 const PartialDiagnostic &PDiag); 3553 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3554 NamedDecl *D, 3555 const PartialDiagnostic &PDiag); 3556 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3557 Expr *ObjectExpr, 3558 Expr *ArgExpr, 3559 DeclAccessPair FoundDecl); 3560 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3561 DeclAccessPair FoundDecl); 3562 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3563 QualType Base, QualType Derived, 3564 const CXXBasePath &Path, 3565 unsigned DiagID, 3566 bool ForceCheck = false, 3567 bool ForceUnprivileged = false); 3568 void CheckLookupAccess(const LookupResult &R); 3569 3570 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3571 const MultiLevelTemplateArgumentList &TemplateArgs); 3572 void PerformDependentDiagnostics(const DeclContext *Pattern, 3573 const MultiLevelTemplateArgumentList &TemplateArgs); 3574 3575 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3576 3577 /// A flag to suppress access checking. 3578 bool SuppressAccessChecking; 3579 3580 /// \brief When true, access checking violations are treated as SFINAE 3581 /// failures rather than hard errors. 3582 bool AccessCheckingSFINAE; 3583 3584 void ActOnStartSuppressingAccessChecks(); 3585 void ActOnStopSuppressingAccessChecks(); 3586 3587 enum AbstractDiagSelID { 3588 AbstractNone = -1, 3589 AbstractReturnType, 3590 AbstractParamType, 3591 AbstractVariableType, 3592 AbstractFieldType, 3593 AbstractArrayType 3594 }; 3595 3596 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3597 const PartialDiagnostic &PD); 3598 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3599 3600 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3601 AbstractDiagSelID SelID = AbstractNone); 3602 3603 //===--------------------------------------------------------------------===// 3604 // C++ Overloaded Operators [C++ 13.5] 3605 // 3606 3607 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3608 3609 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3610 3611 //===--------------------------------------------------------------------===// 3612 // C++ Templates [C++ 14] 3613 // 3614 void FilterAcceptableTemplateNames(LookupResult &R); 3615 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3616 3617 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3618 QualType ObjectType, bool EnteringContext, 3619 bool &MemberOfUnknownSpecialization); 3620 3621 TemplateNameKind isTemplateName(Scope *S, 3622 CXXScopeSpec &SS, 3623 bool hasTemplateKeyword, 3624 UnqualifiedId &Name, 3625 ParsedType ObjectType, 3626 bool EnteringContext, 3627 TemplateTy &Template, 3628 bool &MemberOfUnknownSpecialization); 3629 3630 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3631 SourceLocation IILoc, 3632 Scope *S, 3633 const CXXScopeSpec *SS, 3634 TemplateTy &SuggestedTemplate, 3635 TemplateNameKind &SuggestedKind); 3636 3637 bool DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3638 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3639 3640 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3641 SourceLocation EllipsisLoc, 3642 SourceLocation KeyLoc, 3643 IdentifierInfo *ParamName, 3644 SourceLocation ParamNameLoc, 3645 unsigned Depth, unsigned Position, 3646 SourceLocation EqualLoc, 3647 ParsedType DefaultArg); 3648 3649 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3650 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3651 unsigned Depth, 3652 unsigned Position, 3653 SourceLocation EqualLoc, 3654 Expr *DefaultArg); 3655 Decl *ActOnTemplateTemplateParameter(Scope *S, 3656 SourceLocation TmpLoc, 3657 TemplateParamsTy *Params, 3658 SourceLocation EllipsisLoc, 3659 IdentifierInfo *ParamName, 3660 SourceLocation ParamNameLoc, 3661 unsigned Depth, 3662 unsigned Position, 3663 SourceLocation EqualLoc, 3664 ParsedTemplateArgument DefaultArg); 3665 3666 TemplateParamsTy * 3667 ActOnTemplateParameterList(unsigned Depth, 3668 SourceLocation ExportLoc, 3669 SourceLocation TemplateLoc, 3670 SourceLocation LAngleLoc, 3671 Decl **Params, unsigned NumParams, 3672 SourceLocation RAngleLoc); 3673 3674 /// \brief The context in which we are checking a template parameter 3675 /// list. 3676 enum TemplateParamListContext { 3677 TPC_ClassTemplate, 3678 TPC_FunctionTemplate, 3679 TPC_ClassTemplateMember, 3680 TPC_FriendFunctionTemplate, 3681 TPC_FriendFunctionTemplateDefinition, 3682 TPC_TypeAliasTemplate 3683 }; 3684 3685 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3686 TemplateParameterList *OldParams, 3687 TemplateParamListContext TPC); 3688 TemplateParameterList * 3689 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3690 SourceLocation DeclLoc, 3691 const CXXScopeSpec &SS, 3692 TemplateParameterList **ParamLists, 3693 unsigned NumParamLists, 3694 bool IsFriend, 3695 bool &IsExplicitSpecialization, 3696 bool &Invalid); 3697 3698 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3699 SourceLocation KWLoc, CXXScopeSpec &SS, 3700 IdentifierInfo *Name, SourceLocation NameLoc, 3701 AttributeList *Attr, 3702 TemplateParameterList *TemplateParams, 3703 AccessSpecifier AS, 3704 unsigned NumOuterTemplateParamLists, 3705 TemplateParameterList **OuterTemplateParamLists); 3706 3707 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3708 TemplateArgumentListInfo &Out); 3709 3710 void NoteAllFoundTemplates(TemplateName Name); 3711 3712 QualType CheckTemplateIdType(TemplateName Template, 3713 SourceLocation TemplateLoc, 3714 TemplateArgumentListInfo &TemplateArgs); 3715 3716 TypeResult 3717 ActOnTemplateIdType(CXXScopeSpec &SS, 3718 TemplateTy Template, SourceLocation TemplateLoc, 3719 SourceLocation LAngleLoc, 3720 ASTTemplateArgsPtr TemplateArgs, 3721 SourceLocation RAngleLoc); 3722 3723 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3724 /// such as \c class T::template apply<U>. 3725 /// 3726 /// \param TUK 3727 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3728 TypeSpecifierType TagSpec, 3729 SourceLocation TagLoc, 3730 CXXScopeSpec &SS, 3731 TemplateTy TemplateD, 3732 SourceLocation TemplateLoc, 3733 SourceLocation LAngleLoc, 3734 ASTTemplateArgsPtr TemplateArgsIn, 3735 SourceLocation RAngleLoc); 3736 3737 3738 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3739 LookupResult &R, 3740 bool RequiresADL, 3741 const TemplateArgumentListInfo &TemplateArgs); 3742 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3743 const DeclarationNameInfo &NameInfo, 3744 const TemplateArgumentListInfo &TemplateArgs); 3745 3746 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3747 SourceLocation TemplateKWLoc, 3748 CXXScopeSpec &SS, 3749 UnqualifiedId &Name, 3750 ParsedType ObjectType, 3751 bool EnteringContext, 3752 TemplateTy &Template); 3753 3754 DeclResult 3755 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3756 SourceLocation KWLoc, 3757 CXXScopeSpec &SS, 3758 TemplateTy Template, 3759 SourceLocation TemplateNameLoc, 3760 SourceLocation LAngleLoc, 3761 ASTTemplateArgsPtr TemplateArgs, 3762 SourceLocation RAngleLoc, 3763 AttributeList *Attr, 3764 MultiTemplateParamsArg TemplateParameterLists); 3765 3766 Decl *ActOnTemplateDeclarator(Scope *S, 3767 MultiTemplateParamsArg TemplateParameterLists, 3768 Declarator &D); 3769 3770 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3771 MultiTemplateParamsArg TemplateParameterLists, 3772 Declarator &D); 3773 3774 bool 3775 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3776 TemplateSpecializationKind NewTSK, 3777 NamedDecl *PrevDecl, 3778 TemplateSpecializationKind PrevTSK, 3779 SourceLocation PrevPtOfInstantiation, 3780 bool &SuppressNew); 3781 3782 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3783 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3784 LookupResult &Previous); 3785 3786 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 3787 TemplateArgumentListInfo *ExplicitTemplateArgs, 3788 LookupResult &Previous); 3789 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 3790 3791 DeclResult 3792 ActOnExplicitInstantiation(Scope *S, 3793 SourceLocation ExternLoc, 3794 SourceLocation TemplateLoc, 3795 unsigned TagSpec, 3796 SourceLocation KWLoc, 3797 const CXXScopeSpec &SS, 3798 TemplateTy Template, 3799 SourceLocation TemplateNameLoc, 3800 SourceLocation LAngleLoc, 3801 ASTTemplateArgsPtr TemplateArgs, 3802 SourceLocation RAngleLoc, 3803 AttributeList *Attr); 3804 3805 DeclResult 3806 ActOnExplicitInstantiation(Scope *S, 3807 SourceLocation ExternLoc, 3808 SourceLocation TemplateLoc, 3809 unsigned TagSpec, 3810 SourceLocation KWLoc, 3811 CXXScopeSpec &SS, 3812 IdentifierInfo *Name, 3813 SourceLocation NameLoc, 3814 AttributeList *Attr); 3815 3816 DeclResult ActOnExplicitInstantiation(Scope *S, 3817 SourceLocation ExternLoc, 3818 SourceLocation TemplateLoc, 3819 Declarator &D); 3820 3821 TemplateArgumentLoc 3822 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 3823 SourceLocation TemplateLoc, 3824 SourceLocation RAngleLoc, 3825 Decl *Param, 3826 SmallVectorImpl<TemplateArgument> &Converted); 3827 3828 /// \brief Specifies the context in which a particular template 3829 /// argument is being checked. 3830 enum CheckTemplateArgumentKind { 3831 /// \brief The template argument was specified in the code or was 3832 /// instantiated with some deduced template arguments. 3833 CTAK_Specified, 3834 3835 /// \brief The template argument was deduced via template argument 3836 /// deduction. 3837 CTAK_Deduced, 3838 3839 /// \brief The template argument was deduced from an array bound 3840 /// via template argument deduction. 3841 CTAK_DeducedFromArrayBound 3842 }; 3843 3844 bool CheckTemplateArgument(NamedDecl *Param, 3845 const TemplateArgumentLoc &Arg, 3846 NamedDecl *Template, 3847 SourceLocation TemplateLoc, 3848 SourceLocation RAngleLoc, 3849 unsigned ArgumentPackIndex, 3850 SmallVectorImpl<TemplateArgument> &Converted, 3851 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3852 3853 /// \brief Check that the given template arguments can be be provided to 3854 /// the given template, converting the arguments along the way. 3855 /// 3856 /// \param Template The template to which the template arguments are being 3857 /// provided. 3858 /// 3859 /// \param TemplateLoc The location of the template name in the source. 3860 /// 3861 /// \param TemplateArgs The list of template arguments. If the template is 3862 /// a template template parameter, this function may extend the set of 3863 /// template arguments to also include substituted, defaulted template 3864 /// arguments. 3865 /// 3866 /// \param PartialTemplateArgs True if the list of template arguments is 3867 /// intentionally partial, e.g., because we're checking just the initial 3868 /// set of template arguments. 3869 /// 3870 /// \param Converted Will receive the converted, canonicalized template 3871 /// arguments. 3872 /// 3873 /// \returns True if an error occurred, false otherwise. 3874 bool CheckTemplateArgumentList(TemplateDecl *Template, 3875 SourceLocation TemplateLoc, 3876 TemplateArgumentListInfo &TemplateArgs, 3877 bool PartialTemplateArgs, 3878 SmallVectorImpl<TemplateArgument> &Converted); 3879 3880 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 3881 const TemplateArgumentLoc &Arg, 3882 SmallVectorImpl<TemplateArgument> &Converted); 3883 3884 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 3885 TypeSourceInfo *Arg); 3886 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 3887 TemplateArgument &Converted); 3888 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 3889 QualType InstantiatedParamType, Expr *Arg, 3890 TemplateArgument &Converted, 3891 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3892 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 3893 const TemplateArgumentLoc &Arg); 3894 3895 ExprResult 3896 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 3897 QualType ParamType, 3898 SourceLocation Loc); 3899 ExprResult 3900 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 3901 SourceLocation Loc); 3902 3903 /// \brief Enumeration describing how template parameter lists are compared 3904 /// for equality. 3905 enum TemplateParameterListEqualKind { 3906 /// \brief We are matching the template parameter lists of two templates 3907 /// that might be redeclarations. 3908 /// 3909 /// \code 3910 /// template<typename T> struct X; 3911 /// template<typename T> struct X; 3912 /// \endcode 3913 TPL_TemplateMatch, 3914 3915 /// \brief We are matching the template parameter lists of two template 3916 /// template parameters as part of matching the template parameter lists 3917 /// of two templates that might be redeclarations. 3918 /// 3919 /// \code 3920 /// template<template<int I> class TT> struct X; 3921 /// template<template<int Value> class Other> struct X; 3922 /// \endcode 3923 TPL_TemplateTemplateParmMatch, 3924 3925 /// \brief We are matching the template parameter lists of a template 3926 /// template argument against the template parameter lists of a template 3927 /// template parameter. 3928 /// 3929 /// \code 3930 /// template<template<int Value> class Metafun> struct X; 3931 /// template<int Value> struct integer_c; 3932 /// X<integer_c> xic; 3933 /// \endcode 3934 TPL_TemplateTemplateArgumentMatch 3935 }; 3936 3937 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 3938 TemplateParameterList *Old, 3939 bool Complain, 3940 TemplateParameterListEqualKind Kind, 3941 SourceLocation TemplateArgLoc 3942 = SourceLocation()); 3943 3944 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 3945 3946 /// \brief Called when the parser has parsed a C++ typename 3947 /// specifier, e.g., "typename T::type". 3948 /// 3949 /// \param S The scope in which this typename type occurs. 3950 /// \param TypenameLoc the location of the 'typename' keyword 3951 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3952 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 3953 /// \param IdLoc the location of the identifier. 3954 TypeResult 3955 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3956 const CXXScopeSpec &SS, const IdentifierInfo &II, 3957 SourceLocation IdLoc); 3958 3959 /// \brief Called when the parser has parsed a C++ typename 3960 /// specifier that ends in a template-id, e.g., 3961 /// "typename MetaFun::template apply<T1, T2>". 3962 /// 3963 /// \param S The scope in which this typename type occurs. 3964 /// \param TypenameLoc the location of the 'typename' keyword 3965 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3966 /// \param TemplateLoc the location of the 'template' keyword, if any. 3967 /// \param TemplateName The template name. 3968 /// \param TemplateNameLoc The location of the template name. 3969 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3970 /// \param TemplateArgs The template arguments. 3971 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3972 TypeResult 3973 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3974 const CXXScopeSpec &SS, 3975 SourceLocation TemplateLoc, 3976 TemplateTy Template, 3977 SourceLocation TemplateNameLoc, 3978 SourceLocation LAngleLoc, 3979 ASTTemplateArgsPtr TemplateArgs, 3980 SourceLocation RAngleLoc); 3981 3982 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 3983 SourceLocation KeywordLoc, 3984 NestedNameSpecifierLoc QualifierLoc, 3985 const IdentifierInfo &II, 3986 SourceLocation IILoc); 3987 3988 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 3989 SourceLocation Loc, 3990 DeclarationName Name); 3991 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 3992 3993 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 3994 3995 std::string 3996 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3997 const TemplateArgumentList &Args); 3998 3999 std::string 4000 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4001 const TemplateArgument *Args, 4002 unsigned NumArgs); 4003 4004 //===--------------------------------------------------------------------===// 4005 // C++ Variadic Templates (C++0x [temp.variadic]) 4006 //===--------------------------------------------------------------------===// 4007 4008 /// \brief The context in which an unexpanded parameter pack is 4009 /// being diagnosed. 4010 /// 4011 /// Note that the values of this enumeration line up with the first 4012 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4013 enum UnexpandedParameterPackContext { 4014 /// \brief An arbitrary expression. 4015 UPPC_Expression = 0, 4016 4017 /// \brief The base type of a class type. 4018 UPPC_BaseType, 4019 4020 /// \brief The type of an arbitrary declaration. 4021 UPPC_DeclarationType, 4022 4023 /// \brief The type of a data member. 4024 UPPC_DataMemberType, 4025 4026 /// \brief The size of a bit-field. 4027 UPPC_BitFieldWidth, 4028 4029 /// \brief The expression in a static assertion. 4030 UPPC_StaticAssertExpression, 4031 4032 /// \brief The fixed underlying type of an enumeration. 4033 UPPC_FixedUnderlyingType, 4034 4035 /// \brief The enumerator value. 4036 UPPC_EnumeratorValue, 4037 4038 /// \brief A using declaration. 4039 UPPC_UsingDeclaration, 4040 4041 /// \brief A friend declaration. 4042 UPPC_FriendDeclaration, 4043 4044 /// \brief A declaration qualifier. 4045 UPPC_DeclarationQualifier, 4046 4047 /// \brief An initializer. 4048 UPPC_Initializer, 4049 4050 /// \brief A default argument. 4051 UPPC_DefaultArgument, 4052 4053 /// \brief The type of a non-type template parameter. 4054 UPPC_NonTypeTemplateParameterType, 4055 4056 /// \brief The type of an exception. 4057 UPPC_ExceptionType, 4058 4059 /// \brief Partial specialization. 4060 UPPC_PartialSpecialization 4061 }; 4062 4063 /// \brief If the given type contains an unexpanded parameter pack, 4064 /// diagnose the error. 4065 /// 4066 /// \param Loc The source location where a diagnostc should be emitted. 4067 /// 4068 /// \param T The type that is being checked for unexpanded parameter 4069 /// packs. 4070 /// 4071 /// \returns true if an error occurred, false otherwise. 4072 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4073 UnexpandedParameterPackContext UPPC); 4074 4075 /// \brief If the given expression contains an unexpanded parameter 4076 /// pack, diagnose the error. 4077 /// 4078 /// \param E The expression that is being checked for unexpanded 4079 /// parameter packs. 4080 /// 4081 /// \returns true if an error occurred, false otherwise. 4082 bool DiagnoseUnexpandedParameterPack(Expr *E, 4083 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4084 4085 /// \brief If the given nested-name-specifier contains an unexpanded 4086 /// parameter pack, diagnose the error. 4087 /// 4088 /// \param SS The nested-name-specifier that is being checked for 4089 /// unexpanded parameter packs. 4090 /// 4091 /// \returns true if an error occurred, false otherwise. 4092 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4093 UnexpandedParameterPackContext UPPC); 4094 4095 /// \brief If the given name contains an unexpanded parameter pack, 4096 /// diagnose the error. 4097 /// 4098 /// \param NameInfo The name (with source location information) that 4099 /// is being checked for unexpanded parameter packs. 4100 /// 4101 /// \returns true if an error occurred, false otherwise. 4102 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4103 UnexpandedParameterPackContext UPPC); 4104 4105 /// \brief If the given template name contains an unexpanded parameter pack, 4106 /// diagnose the error. 4107 /// 4108 /// \param Loc The location of the template name. 4109 /// 4110 /// \param Template The template name that is being checked for unexpanded 4111 /// parameter packs. 4112 /// 4113 /// \returns true if an error occurred, false otherwise. 4114 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4115 TemplateName Template, 4116 UnexpandedParameterPackContext UPPC); 4117 4118 /// \brief If the given template argument contains an unexpanded parameter 4119 /// pack, diagnose the error. 4120 /// 4121 /// \param Arg The template argument that is being checked for unexpanded 4122 /// parameter packs. 4123 /// 4124 /// \returns true if an error occurred, false otherwise. 4125 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4126 UnexpandedParameterPackContext UPPC); 4127 4128 /// \brief Collect the set of unexpanded parameter packs within the given 4129 /// template argument. 4130 /// 4131 /// \param Arg The template argument that will be traversed to find 4132 /// unexpanded parameter packs. 4133 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4134 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4135 4136 /// \brief Collect the set of unexpanded parameter packs within the given 4137 /// template argument. 4138 /// 4139 /// \param Arg The template argument that will be traversed to find 4140 /// unexpanded parameter packs. 4141 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4142 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4143 4144 /// \brief Collect the set of unexpanded parameter packs within the given 4145 /// type. 4146 /// 4147 /// \param T The type that will be traversed to find 4148 /// unexpanded parameter packs. 4149 void collectUnexpandedParameterPacks(QualType T, 4150 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4151 4152 /// \brief Collect the set of unexpanded parameter packs within the given 4153 /// type. 4154 /// 4155 /// \param TL The type that will be traversed to find 4156 /// unexpanded parameter packs. 4157 void collectUnexpandedParameterPacks(TypeLoc TL, 4158 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4159 4160 /// \brief Invoked when parsing a template argument followed by an 4161 /// ellipsis, which creates a pack expansion. 4162 /// 4163 /// \param Arg The template argument preceding the ellipsis, which 4164 /// may already be invalid. 4165 /// 4166 /// \param EllipsisLoc The location of the ellipsis. 4167 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4168 SourceLocation EllipsisLoc); 4169 4170 /// \brief Invoked when parsing a type followed by an ellipsis, which 4171 /// creates a pack expansion. 4172 /// 4173 /// \param Type The type preceding the ellipsis, which will become 4174 /// the pattern of the pack expansion. 4175 /// 4176 /// \param EllipsisLoc The location of the ellipsis. 4177 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4178 4179 /// \brief Construct a pack expansion type from the pattern of the pack 4180 /// expansion. 4181 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4182 SourceLocation EllipsisLoc, 4183 llvm::Optional<unsigned> NumExpansions); 4184 4185 /// \brief Construct a pack expansion type from the pattern of the pack 4186 /// expansion. 4187 QualType CheckPackExpansion(QualType Pattern, 4188 SourceRange PatternRange, 4189 SourceLocation EllipsisLoc, 4190 llvm::Optional<unsigned> NumExpansions); 4191 4192 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4193 /// creates a pack expansion. 4194 /// 4195 /// \param Pattern The expression preceding the ellipsis, which will become 4196 /// the pattern of the pack expansion. 4197 /// 4198 /// \param EllipsisLoc The location of the ellipsis. 4199 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4200 4201 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4202 /// creates a pack expansion. 4203 /// 4204 /// \param Pattern The expression preceding the ellipsis, which will become 4205 /// the pattern of the pack expansion. 4206 /// 4207 /// \param EllipsisLoc The location of the ellipsis. 4208 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4209 llvm::Optional<unsigned> NumExpansions); 4210 4211 /// \brief Determine whether we could expand a pack expansion with the 4212 /// given set of parameter packs into separate arguments by repeatedly 4213 /// transforming the pattern. 4214 /// 4215 /// \param EllipsisLoc The location of the ellipsis that identifies the 4216 /// pack expansion. 4217 /// 4218 /// \param PatternRange The source range that covers the entire pattern of 4219 /// the pack expansion. 4220 /// 4221 /// \param Unexpanded The set of unexpanded parameter packs within the 4222 /// pattern. 4223 /// 4224 /// \param NumUnexpanded The number of unexpanded parameter packs in 4225 /// \p Unexpanded. 4226 /// 4227 /// \param ShouldExpand Will be set to \c true if the transformer should 4228 /// expand the corresponding pack expansions into separate arguments. When 4229 /// set, \c NumExpansions must also be set. 4230 /// 4231 /// \param RetainExpansion Whether the caller should add an unexpanded 4232 /// pack expansion after all of the expanded arguments. This is used 4233 /// when extending explicitly-specified template argument packs per 4234 /// C++0x [temp.arg.explicit]p9. 4235 /// 4236 /// \param NumExpansions The number of separate arguments that will be in 4237 /// the expanded form of the corresponding pack expansion. This is both an 4238 /// input and an output parameter, which can be set by the caller if the 4239 /// number of expansions is known a priori (e.g., due to a prior substitution) 4240 /// and will be set by the callee when the number of expansions is known. 4241 /// The callee must set this value when \c ShouldExpand is \c true; it may 4242 /// set this value in other cases. 4243 /// 4244 /// \returns true if an error occurred (e.g., because the parameter packs 4245 /// are to be instantiated with arguments of different lengths), false 4246 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4247 /// must be set. 4248 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4249 SourceRange PatternRange, 4250 const UnexpandedParameterPack *Unexpanded, 4251 unsigned NumUnexpanded, 4252 const MultiLevelTemplateArgumentList &TemplateArgs, 4253 bool &ShouldExpand, 4254 bool &RetainExpansion, 4255 llvm::Optional<unsigned> &NumExpansions); 4256 4257 /// \brief Determine the number of arguments in the given pack expansion 4258 /// type. 4259 /// 4260 /// This routine already assumes that the pack expansion type can be 4261 /// expanded and that the number of arguments in the expansion is 4262 /// consistent across all of the unexpanded parameter packs in its pattern. 4263 unsigned getNumArgumentsInExpansion(QualType T, 4264 const MultiLevelTemplateArgumentList &TemplateArgs); 4265 4266 /// \brief Determine whether the given declarator contains any unexpanded 4267 /// parameter packs. 4268 /// 4269 /// This routine is used by the parser to disambiguate function declarators 4270 /// with an ellipsis prior to the ')', e.g., 4271 /// 4272 /// \code 4273 /// void f(T...); 4274 /// \endcode 4275 /// 4276 /// To determine whether we have an (unnamed) function parameter pack or 4277 /// a variadic function. 4278 /// 4279 /// \returns true if the declarator contains any unexpanded parameter packs, 4280 /// false otherwise. 4281 bool containsUnexpandedParameterPacks(Declarator &D); 4282 4283 //===--------------------------------------------------------------------===// 4284 // C++ Template Argument Deduction (C++ [temp.deduct]) 4285 //===--------------------------------------------------------------------===// 4286 4287 /// \brief Describes the result of template argument deduction. 4288 /// 4289 /// The TemplateDeductionResult enumeration describes the result of 4290 /// template argument deduction, as returned from 4291 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4292 /// structure provides additional information about the results of 4293 /// template argument deduction, e.g., the deduced template argument 4294 /// list (if successful) or the specific template parameters or 4295 /// deduced arguments that were involved in the failure. 4296 enum TemplateDeductionResult { 4297 /// \brief Template argument deduction was successful. 4298 TDK_Success = 0, 4299 /// \brief Template argument deduction exceeded the maximum template 4300 /// instantiation depth (which has already been diagnosed). 4301 TDK_InstantiationDepth, 4302 /// \brief Template argument deduction did not deduce a value 4303 /// for every template parameter. 4304 TDK_Incomplete, 4305 /// \brief Template argument deduction produced inconsistent 4306 /// deduced values for the given template parameter. 4307 TDK_Inconsistent, 4308 /// \brief Template argument deduction failed due to inconsistent 4309 /// cv-qualifiers on a template parameter type that would 4310 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4311 /// but were given a non-const "X". 4312 TDK_Underqualified, 4313 /// \brief Substitution of the deduced template argument values 4314 /// resulted in an error. 4315 TDK_SubstitutionFailure, 4316 /// \brief Substitution of the deduced template argument values 4317 /// into a non-deduced context produced a type or value that 4318 /// produces a type that does not match the original template 4319 /// arguments provided. 4320 TDK_NonDeducedMismatch, 4321 /// \brief When performing template argument deduction for a function 4322 /// template, there were too many call arguments. 4323 TDK_TooManyArguments, 4324 /// \brief When performing template argument deduction for a function 4325 /// template, there were too few call arguments. 4326 TDK_TooFewArguments, 4327 /// \brief The explicitly-specified template arguments were not valid 4328 /// template arguments for the given template. 4329 TDK_InvalidExplicitArguments, 4330 /// \brief The arguments included an overloaded function name that could 4331 /// not be resolved to a suitable function. 4332 TDK_FailedOverloadResolution 4333 }; 4334 4335 TemplateDeductionResult 4336 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4337 const TemplateArgumentList &TemplateArgs, 4338 sema::TemplateDeductionInfo &Info); 4339 4340 TemplateDeductionResult 4341 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4342 TemplateArgumentListInfo &ExplicitTemplateArgs, 4343 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4344 SmallVectorImpl<QualType> &ParamTypes, 4345 QualType *FunctionType, 4346 sema::TemplateDeductionInfo &Info); 4347 4348 /// brief A function argument from which we performed template argument 4349 // deduction for a call. 4350 struct OriginalCallArg { 4351 OriginalCallArg(QualType OriginalParamType, 4352 unsigned ArgIdx, 4353 QualType OriginalArgType) 4354 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4355 OriginalArgType(OriginalArgType) { } 4356 4357 QualType OriginalParamType; 4358 unsigned ArgIdx; 4359 QualType OriginalArgType; 4360 }; 4361 4362 TemplateDeductionResult 4363 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4364 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4365 unsigned NumExplicitlySpecified, 4366 FunctionDecl *&Specialization, 4367 sema::TemplateDeductionInfo &Info, 4368 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4369 4370 TemplateDeductionResult 4371 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4372 TemplateArgumentListInfo *ExplicitTemplateArgs, 4373 Expr **Args, unsigned NumArgs, 4374 FunctionDecl *&Specialization, 4375 sema::TemplateDeductionInfo &Info); 4376 4377 TemplateDeductionResult 4378 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4379 TemplateArgumentListInfo *ExplicitTemplateArgs, 4380 QualType ArgFunctionType, 4381 FunctionDecl *&Specialization, 4382 sema::TemplateDeductionInfo &Info); 4383 4384 TemplateDeductionResult 4385 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4386 QualType ToType, 4387 CXXConversionDecl *&Specialization, 4388 sema::TemplateDeductionInfo &Info); 4389 4390 TemplateDeductionResult 4391 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4392 TemplateArgumentListInfo *ExplicitTemplateArgs, 4393 FunctionDecl *&Specialization, 4394 sema::TemplateDeductionInfo &Info); 4395 4396 bool DeduceAutoType(TypeSourceInfo *AutoType, Expr *Initializer, 4397 TypeSourceInfo *&Result); 4398 4399 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4400 FunctionTemplateDecl *FT2, 4401 SourceLocation Loc, 4402 TemplatePartialOrderingContext TPOC, 4403 unsigned NumCallArguments); 4404 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4405 UnresolvedSetIterator SEnd, 4406 TemplatePartialOrderingContext TPOC, 4407 unsigned NumCallArguments, 4408 SourceLocation Loc, 4409 const PartialDiagnostic &NoneDiag, 4410 const PartialDiagnostic &AmbigDiag, 4411 const PartialDiagnostic &CandidateDiag, 4412 bool Complain = true); 4413 4414 ClassTemplatePartialSpecializationDecl * 4415 getMoreSpecializedPartialSpecialization( 4416 ClassTemplatePartialSpecializationDecl *PS1, 4417 ClassTemplatePartialSpecializationDecl *PS2, 4418 SourceLocation Loc); 4419 4420 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4421 bool OnlyDeduced, 4422 unsigned Depth, 4423 SmallVectorImpl<bool> &Used); 4424 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4425 SmallVectorImpl<bool> &Deduced); 4426 4427 //===--------------------------------------------------------------------===// 4428 // C++ Template Instantiation 4429 // 4430 4431 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4432 const TemplateArgumentList *Innermost = 0, 4433 bool RelativeToPrimary = false, 4434 const FunctionDecl *Pattern = 0); 4435 4436 /// \brief A template instantiation that is currently in progress. 4437 struct ActiveTemplateInstantiation { 4438 /// \brief The kind of template instantiation we are performing 4439 enum InstantiationKind { 4440 /// We are instantiating a template declaration. The entity is 4441 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4442 TemplateInstantiation, 4443 4444 /// We are instantiating a default argument for a template 4445 /// parameter. The Entity is the template, and 4446 /// TemplateArgs/NumTemplateArguments provides the template 4447 /// arguments as specified. 4448 /// FIXME: Use a TemplateArgumentList 4449 DefaultTemplateArgumentInstantiation, 4450 4451 /// We are instantiating a default argument for a function. 4452 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4453 /// provides the template arguments as specified. 4454 DefaultFunctionArgumentInstantiation, 4455 4456 /// We are substituting explicit template arguments provided for 4457 /// a function template. The entity is a FunctionTemplateDecl. 4458 ExplicitTemplateArgumentSubstitution, 4459 4460 /// We are substituting template argument determined as part of 4461 /// template argument deduction for either a class template 4462 /// partial specialization or a function template. The 4463 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4464 /// a FunctionTemplateDecl. 4465 DeducedTemplateArgumentSubstitution, 4466 4467 /// We are substituting prior template arguments into a new 4468 /// template parameter. The template parameter itself is either a 4469 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4470 PriorTemplateArgumentSubstitution, 4471 4472 /// We are checking the validity of a default template argument that 4473 /// has been used when naming a template-id. 4474 DefaultTemplateArgumentChecking 4475 } Kind; 4476 4477 /// \brief The point of instantiation within the source code. 4478 SourceLocation PointOfInstantiation; 4479 4480 /// \brief The template (or partial specialization) in which we are 4481 /// performing the instantiation, for substitutions of prior template 4482 /// arguments. 4483 NamedDecl *Template; 4484 4485 /// \brief The entity that is being instantiated. 4486 uintptr_t Entity; 4487 4488 /// \brief The list of template arguments we are substituting, if they 4489 /// are not part of the entity. 4490 const TemplateArgument *TemplateArgs; 4491 4492 /// \brief The number of template arguments in TemplateArgs. 4493 unsigned NumTemplateArgs; 4494 4495 /// \brief The template deduction info object associated with the 4496 /// substitution or checking of explicit or deduced template arguments. 4497 sema::TemplateDeductionInfo *DeductionInfo; 4498 4499 /// \brief The source range that covers the construct that cause 4500 /// the instantiation, e.g., the template-id that causes a class 4501 /// template instantiation. 4502 SourceRange InstantiationRange; 4503 4504 ActiveTemplateInstantiation() 4505 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4506 NumTemplateArgs(0), DeductionInfo(0) {} 4507 4508 /// \brief Determines whether this template is an actual instantiation 4509 /// that should be counted toward the maximum instantiation depth. 4510 bool isInstantiationRecord() const; 4511 4512 friend bool operator==(const ActiveTemplateInstantiation &X, 4513 const ActiveTemplateInstantiation &Y) { 4514 if (X.Kind != Y.Kind) 4515 return false; 4516 4517 if (X.Entity != Y.Entity) 4518 return false; 4519 4520 switch (X.Kind) { 4521 case TemplateInstantiation: 4522 return true; 4523 4524 case PriorTemplateArgumentSubstitution: 4525 case DefaultTemplateArgumentChecking: 4526 if (X.Template != Y.Template) 4527 return false; 4528 4529 // Fall through 4530 4531 case DefaultTemplateArgumentInstantiation: 4532 case ExplicitTemplateArgumentSubstitution: 4533 case DeducedTemplateArgumentSubstitution: 4534 case DefaultFunctionArgumentInstantiation: 4535 return X.TemplateArgs == Y.TemplateArgs; 4536 4537 } 4538 4539 return true; 4540 } 4541 4542 friend bool operator!=(const ActiveTemplateInstantiation &X, 4543 const ActiveTemplateInstantiation &Y) { 4544 return !(X == Y); 4545 } 4546 }; 4547 4548 /// \brief List of active template instantiations. 4549 /// 4550 /// This vector is treated as a stack. As one template instantiation 4551 /// requires another template instantiation, additional 4552 /// instantiations are pushed onto the stack up to a 4553 /// user-configurable limit LangOptions::InstantiationDepth. 4554 SmallVector<ActiveTemplateInstantiation, 16> 4555 ActiveTemplateInstantiations; 4556 4557 /// \brief Whether we are in a SFINAE context that is not associated with 4558 /// template instantiation. 4559 /// 4560 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4561 /// of a template instantiation or template argument deduction. 4562 bool InNonInstantiationSFINAEContext; 4563 4564 /// \brief The number of ActiveTemplateInstantiation entries in 4565 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4566 /// therefore, should not be counted as part of the instantiation depth. 4567 unsigned NonInstantiationEntries; 4568 4569 /// \brief The last template from which a template instantiation 4570 /// error or warning was produced. 4571 /// 4572 /// This value is used to suppress printing of redundant template 4573 /// instantiation backtraces when there are multiple errors in the 4574 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4575 /// to implement it anywhere else. 4576 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4577 4578 /// \brief The current index into pack expansion arguments that will be 4579 /// used for substitution of parameter packs. 4580 /// 4581 /// The pack expansion index will be -1 to indicate that parameter packs 4582 /// should be instantiated as themselves. Otherwise, the index specifies 4583 /// which argument within the parameter pack will be used for substitution. 4584 int ArgumentPackSubstitutionIndex; 4585 4586 /// \brief RAII object used to change the argument pack substitution index 4587 /// within a \c Sema object. 4588 /// 4589 /// See \c ArgumentPackSubstitutionIndex for more information. 4590 class ArgumentPackSubstitutionIndexRAII { 4591 Sema &Self; 4592 int OldSubstitutionIndex; 4593 4594 public: 4595 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4596 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4597 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4598 } 4599 4600 ~ArgumentPackSubstitutionIndexRAII() { 4601 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4602 } 4603 }; 4604 4605 friend class ArgumentPackSubstitutionRAII; 4606 4607 /// \brief The stack of calls expression undergoing template instantiation. 4608 /// 4609 /// The top of this stack is used by a fixit instantiating unresolved 4610 /// function calls to fix the AST to match the textual change it prints. 4611 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4612 4613 /// \brief For each declaration that involved template argument deduction, the 4614 /// set of diagnostics that were suppressed during that template argument 4615 /// deduction. 4616 /// 4617 /// FIXME: Serialize this structure to the AST file. 4618 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 4619 SuppressedDiagnostics; 4620 4621 /// \brief A stack object to be created when performing template 4622 /// instantiation. 4623 /// 4624 /// Construction of an object of type \c InstantiatingTemplate 4625 /// pushes the current instantiation onto the stack of active 4626 /// instantiations. If the size of this stack exceeds the maximum 4627 /// number of recursive template instantiations, construction 4628 /// produces an error and evaluates true. 4629 /// 4630 /// Destruction of this object will pop the named instantiation off 4631 /// the stack. 4632 struct InstantiatingTemplate { 4633 /// \brief Note that we are instantiating a class template, 4634 /// function template, or a member thereof. 4635 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4636 Decl *Entity, 4637 SourceRange InstantiationRange = SourceRange()); 4638 4639 /// \brief Note that we are instantiating a default argument in a 4640 /// template-id. 4641 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4642 TemplateDecl *Template, 4643 const TemplateArgument *TemplateArgs, 4644 unsigned NumTemplateArgs, 4645 SourceRange InstantiationRange = SourceRange()); 4646 4647 /// \brief Note that we are instantiating a default argument in a 4648 /// template-id. 4649 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4650 FunctionTemplateDecl *FunctionTemplate, 4651 const TemplateArgument *TemplateArgs, 4652 unsigned NumTemplateArgs, 4653 ActiveTemplateInstantiation::InstantiationKind Kind, 4654 sema::TemplateDeductionInfo &DeductionInfo, 4655 SourceRange InstantiationRange = SourceRange()); 4656 4657 /// \brief Note that we are instantiating as part of template 4658 /// argument deduction for a class template partial 4659 /// specialization. 4660 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4661 ClassTemplatePartialSpecializationDecl *PartialSpec, 4662 const TemplateArgument *TemplateArgs, 4663 unsigned NumTemplateArgs, 4664 sema::TemplateDeductionInfo &DeductionInfo, 4665 SourceRange InstantiationRange = SourceRange()); 4666 4667 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4668 ParmVarDecl *Param, 4669 const TemplateArgument *TemplateArgs, 4670 unsigned NumTemplateArgs, 4671 SourceRange InstantiationRange = SourceRange()); 4672 4673 /// \brief Note that we are substituting prior template arguments into a 4674 /// non-type or template template parameter. 4675 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4676 NamedDecl *Template, 4677 NonTypeTemplateParmDecl *Param, 4678 const TemplateArgument *TemplateArgs, 4679 unsigned NumTemplateArgs, 4680 SourceRange InstantiationRange); 4681 4682 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4683 NamedDecl *Template, 4684 TemplateTemplateParmDecl *Param, 4685 const TemplateArgument *TemplateArgs, 4686 unsigned NumTemplateArgs, 4687 SourceRange InstantiationRange); 4688 4689 /// \brief Note that we are checking the default template argument 4690 /// against the template parameter for a given template-id. 4691 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4692 TemplateDecl *Template, 4693 NamedDecl *Param, 4694 const TemplateArgument *TemplateArgs, 4695 unsigned NumTemplateArgs, 4696 SourceRange InstantiationRange); 4697 4698 4699 /// \brief Note that we have finished instantiating this template. 4700 void Clear(); 4701 4702 ~InstantiatingTemplate() { Clear(); } 4703 4704 /// \brief Determines whether we have exceeded the maximum 4705 /// recursive template instantiations. 4706 operator bool() const { return Invalid; } 4707 4708 private: 4709 Sema &SemaRef; 4710 bool Invalid; 4711 bool SavedInNonInstantiationSFINAEContext; 4712 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4713 SourceRange InstantiationRange); 4714 4715 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4716 4717 InstantiatingTemplate& 4718 operator=(const InstantiatingTemplate&); // not implemented 4719 }; 4720 4721 void PrintInstantiationStack(); 4722 4723 /// \brief Determines whether we are currently in a context where 4724 /// template argument substitution failures are not considered 4725 /// errors. 4726 /// 4727 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4728 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4729 /// template-deduction context object, which can be used to capture 4730 /// diagnostics that will be suppressed. 4731 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4732 4733 /// \brief RAII class used to determine whether SFINAE has 4734 /// trapped any errors that occur during template argument 4735 /// deduction.` 4736 class SFINAETrap { 4737 Sema &SemaRef; 4738 unsigned PrevSFINAEErrors; 4739 bool PrevInNonInstantiationSFINAEContext; 4740 bool PrevAccessCheckingSFINAE; 4741 4742 public: 4743 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 4744 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 4745 PrevInNonInstantiationSFINAEContext( 4746 SemaRef.InNonInstantiationSFINAEContext), 4747 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 4748 { 4749 if (!SemaRef.isSFINAEContext()) 4750 SemaRef.InNonInstantiationSFINAEContext = true; 4751 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 4752 } 4753 4754 ~SFINAETrap() { 4755 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 4756 SemaRef.InNonInstantiationSFINAEContext 4757 = PrevInNonInstantiationSFINAEContext; 4758 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 4759 } 4760 4761 /// \brief Determine whether any SFINAE errors have been trapped. 4762 bool hasErrorOccurred() const { 4763 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 4764 } 4765 }; 4766 4767 /// \brief The current instantiation scope used to store local 4768 /// variables. 4769 LocalInstantiationScope *CurrentInstantiationScope; 4770 4771 /// \brief The number of typos corrected by CorrectTypo. 4772 unsigned TyposCorrected; 4773 4774 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 4775 UnqualifiedTyposCorrectedMap; 4776 4777 /// \brief A cache containing the results of typo correction for unqualified 4778 /// name lookup. 4779 /// 4780 /// The string is the string that we corrected to (which may be empty, if 4781 /// there was no correction), while the boolean will be true when the 4782 /// string represents a keyword. 4783 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 4784 4785 /// \brief Worker object for performing CFG-based warnings. 4786 sema::AnalysisBasedWarnings AnalysisWarnings; 4787 4788 /// \brief An entity for which implicit template instantiation is required. 4789 /// 4790 /// The source location associated with the declaration is the first place in 4791 /// the source code where the declaration was "used". It is not necessarily 4792 /// the point of instantiation (which will be either before or after the 4793 /// namespace-scope declaration that triggered this implicit instantiation), 4794 /// However, it is the location that diagnostics should generally refer to, 4795 /// because users will need to know what code triggered the instantiation. 4796 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 4797 4798 /// \brief The queue of implicit template instantiations that are required 4799 /// but have not yet been performed. 4800 std::deque<PendingImplicitInstantiation> PendingInstantiations; 4801 4802 /// \brief The queue of implicit template instantiations that are required 4803 /// and must be performed within the current local scope. 4804 /// 4805 /// This queue is only used for member functions of local classes in 4806 /// templates, which must be instantiated in the same scope as their 4807 /// enclosing function, so that they can reference function-local 4808 /// types, static variables, enumerators, etc. 4809 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 4810 4811 void PerformPendingInstantiations(bool LocalOnly = false); 4812 4813 TypeSourceInfo *SubstType(TypeSourceInfo *T, 4814 const MultiLevelTemplateArgumentList &TemplateArgs, 4815 SourceLocation Loc, DeclarationName Entity); 4816 4817 QualType SubstType(QualType T, 4818 const MultiLevelTemplateArgumentList &TemplateArgs, 4819 SourceLocation Loc, DeclarationName Entity); 4820 4821 TypeSourceInfo *SubstType(TypeLoc TL, 4822 const MultiLevelTemplateArgumentList &TemplateArgs, 4823 SourceLocation Loc, DeclarationName Entity); 4824 4825 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 4826 const MultiLevelTemplateArgumentList &TemplateArgs, 4827 SourceLocation Loc, 4828 DeclarationName Entity); 4829 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 4830 const MultiLevelTemplateArgumentList &TemplateArgs, 4831 int indexAdjustment, 4832 llvm::Optional<unsigned> NumExpansions); 4833 bool SubstParmTypes(SourceLocation Loc, 4834 ParmVarDecl **Params, unsigned NumParams, 4835 const MultiLevelTemplateArgumentList &TemplateArgs, 4836 SmallVectorImpl<QualType> &ParamTypes, 4837 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 4838 ExprResult SubstExpr(Expr *E, 4839 const MultiLevelTemplateArgumentList &TemplateArgs); 4840 4841 /// \brief Substitute the given template arguments into a list of 4842 /// expressions, expanding pack expansions if required. 4843 /// 4844 /// \param Exprs The list of expressions to substitute into. 4845 /// 4846 /// \param NumExprs The number of expressions in \p Exprs. 4847 /// 4848 /// \param IsCall Whether this is some form of call, in which case 4849 /// default arguments will be dropped. 4850 /// 4851 /// \param TemplateArgs The set of template arguments to substitute. 4852 /// 4853 /// \param Outputs Will receive all of the substituted arguments. 4854 /// 4855 /// \returns true if an error occurred, false otherwise. 4856 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 4857 const MultiLevelTemplateArgumentList &TemplateArgs, 4858 SmallVectorImpl<Expr *> &Outputs); 4859 4860 StmtResult SubstStmt(Stmt *S, 4861 const MultiLevelTemplateArgumentList &TemplateArgs); 4862 4863 Decl *SubstDecl(Decl *D, DeclContext *Owner, 4864 const MultiLevelTemplateArgumentList &TemplateArgs); 4865 4866 bool 4867 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 4868 CXXRecordDecl *Pattern, 4869 const MultiLevelTemplateArgumentList &TemplateArgs); 4870 4871 bool 4872 InstantiateClass(SourceLocation PointOfInstantiation, 4873 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 4874 const MultiLevelTemplateArgumentList &TemplateArgs, 4875 TemplateSpecializationKind TSK, 4876 bool Complain = true); 4877 4878 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 4879 const Decl *Pattern, Decl *Inst); 4880 4881 bool 4882 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 4883 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4884 TemplateSpecializationKind TSK, 4885 bool Complain = true); 4886 4887 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 4888 CXXRecordDecl *Instantiation, 4889 const MultiLevelTemplateArgumentList &TemplateArgs, 4890 TemplateSpecializationKind TSK); 4891 4892 void InstantiateClassTemplateSpecializationMembers( 4893 SourceLocation PointOfInstantiation, 4894 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4895 TemplateSpecializationKind TSK); 4896 4897 NestedNameSpecifierLoc 4898 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 4899 const MultiLevelTemplateArgumentList &TemplateArgs); 4900 4901 DeclarationNameInfo 4902 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 4903 const MultiLevelTemplateArgumentList &TemplateArgs); 4904 TemplateName 4905 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 4906 SourceLocation Loc, 4907 const MultiLevelTemplateArgumentList &TemplateArgs); 4908 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 4909 TemplateArgumentListInfo &Result, 4910 const MultiLevelTemplateArgumentList &TemplateArgs); 4911 4912 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 4913 FunctionDecl *Function, 4914 bool Recursive = false, 4915 bool DefinitionRequired = false); 4916 void InstantiateStaticDataMemberDefinition( 4917 SourceLocation PointOfInstantiation, 4918 VarDecl *Var, 4919 bool Recursive = false, 4920 bool DefinitionRequired = false); 4921 4922 void InstantiateMemInitializers(CXXConstructorDecl *New, 4923 const CXXConstructorDecl *Tmpl, 4924 const MultiLevelTemplateArgumentList &TemplateArgs); 4925 bool InstantiateInitializer(Expr *Init, 4926 const MultiLevelTemplateArgumentList &TemplateArgs, 4927 SourceLocation &LParenLoc, 4928 ASTOwningVector<Expr*> &NewArgs, 4929 SourceLocation &RParenLoc); 4930 4931 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 4932 const MultiLevelTemplateArgumentList &TemplateArgs); 4933 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 4934 const MultiLevelTemplateArgumentList &TemplateArgs); 4935 4936 // Objective-C declarations. 4937 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 4938 IdentifierInfo *ClassName, 4939 SourceLocation ClassLoc, 4940 IdentifierInfo *SuperName, 4941 SourceLocation SuperLoc, 4942 Decl * const *ProtoRefs, 4943 unsigned NumProtoRefs, 4944 const SourceLocation *ProtoLocs, 4945 SourceLocation EndProtoLoc, 4946 AttributeList *AttrList); 4947 4948 Decl *ActOnCompatiblityAlias( 4949 SourceLocation AtCompatibilityAliasLoc, 4950 IdentifierInfo *AliasName, SourceLocation AliasLocation, 4951 IdentifierInfo *ClassName, SourceLocation ClassLocation); 4952 4953 bool CheckForwardProtocolDeclarationForCircularDependency( 4954 IdentifierInfo *PName, 4955 SourceLocation &PLoc, SourceLocation PrevLoc, 4956 const ObjCList<ObjCProtocolDecl> &PList); 4957 4958 Decl *ActOnStartProtocolInterface( 4959 SourceLocation AtProtoInterfaceLoc, 4960 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 4961 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 4962 const SourceLocation *ProtoLocs, 4963 SourceLocation EndProtoLoc, 4964 AttributeList *AttrList); 4965 4966 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 4967 IdentifierInfo *ClassName, 4968 SourceLocation ClassLoc, 4969 IdentifierInfo *CategoryName, 4970 SourceLocation CategoryLoc, 4971 Decl * const *ProtoRefs, 4972 unsigned NumProtoRefs, 4973 const SourceLocation *ProtoLocs, 4974 SourceLocation EndProtoLoc); 4975 4976 Decl *ActOnStartClassImplementation( 4977 SourceLocation AtClassImplLoc, 4978 IdentifierInfo *ClassName, SourceLocation ClassLoc, 4979 IdentifierInfo *SuperClassname, 4980 SourceLocation SuperClassLoc); 4981 4982 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 4983 IdentifierInfo *ClassName, 4984 SourceLocation ClassLoc, 4985 IdentifierInfo *CatName, 4986 SourceLocation CatLoc); 4987 4988 Decl *ActOnForwardClassDeclaration(SourceLocation Loc, 4989 IdentifierInfo **IdentList, 4990 SourceLocation *IdentLocs, 4991 unsigned NumElts); 4992 4993 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 4994 const IdentifierLocPair *IdentList, 4995 unsigned NumElts, 4996 AttributeList *attrList); 4997 4998 void FindProtocolDeclaration(bool WarnOnDeclarations, 4999 const IdentifierLocPair *ProtocolId, 5000 unsigned NumProtocols, 5001 SmallVectorImpl<Decl *> &Protocols); 5002 5003 /// Ensure attributes are consistent with type. 5004 /// \param [in, out] Attributes The attributes to check; they will 5005 /// be modified to be consistent with \arg PropertyTy. 5006 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5007 SourceLocation Loc, 5008 unsigned &Attributes); 5009 5010 /// Process the specified property declaration and create decls for the 5011 /// setters and getters as needed. 5012 /// \param property The property declaration being processed 5013 /// \param DC The semantic container for the property 5014 /// \param redeclaredProperty Declaration for property if redeclared 5015 /// in class extension. 5016 /// \param lexicalDC Container for redeclaredProperty. 5017 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5018 ObjCContainerDecl *DC, 5019 ObjCPropertyDecl *redeclaredProperty = 0, 5020 ObjCContainerDecl *lexicalDC = 0); 5021 5022 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5023 ObjCPropertyDecl *SuperProperty, 5024 const IdentifierInfo *Name); 5025 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5026 5027 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5028 ObjCMethodDecl *MethodDecl, 5029 bool IsInstance); 5030 5031 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5032 5033 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5034 ObjCInterfaceDecl *ID); 5035 5036 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5037 ObjCProtocolDecl *PDecl); 5038 5039 void ActOnAtEnd(Scope *S, SourceRange AtEnd, Decl *classDecl, 5040 Decl **allMethods = 0, unsigned allNum = 0, 5041 Decl **allProperties = 0, unsigned pNum = 0, 5042 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5043 5044 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5045 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5046 Selector GetterSel, Selector SetterSel, 5047 Decl *ClassCategory, 5048 bool *OverridingProperty, 5049 tok::ObjCKeywordKind MethodImplKind, 5050 DeclContext *lexicalDC = 0); 5051 5052 Decl *ActOnPropertyImplDecl(Scope *S, 5053 SourceLocation AtLoc, 5054 SourceLocation PropertyLoc, 5055 bool ImplKind,Decl *ClassImplDecl, 5056 IdentifierInfo *PropertyId, 5057 IdentifierInfo *PropertyIvar, 5058 SourceLocation PropertyIvarLoc); 5059 5060 enum ObjCSpecialMethodKind { 5061 OSMK_None, 5062 OSMK_Alloc, 5063 OSMK_New, 5064 OSMK_Copy, 5065 OSMK_RetainingInit, 5066 OSMK_NonRetainingInit 5067 }; 5068 5069 struct ObjCArgInfo { 5070 IdentifierInfo *Name; 5071 SourceLocation NameLoc; 5072 // The Type is null if no type was specified, and the DeclSpec is invalid 5073 // in this case. 5074 ParsedType Type; 5075 ObjCDeclSpec DeclSpec; 5076 5077 /// ArgAttrs - Attribute list for this argument. 5078 AttributeList *ArgAttrs; 5079 }; 5080 5081 Decl *ActOnMethodDeclaration( 5082 Scope *S, 5083 SourceLocation BeginLoc, // location of the + or -. 5084 SourceLocation EndLoc, // location of the ; or {. 5085 tok::TokenKind MethodType, 5086 Decl *ClassDecl, ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5087 SourceLocation SelectorStartLoc, Selector Sel, 5088 // optional arguments. The number of types/arguments is obtained 5089 // from the Sel.getNumArgs(). 5090 ObjCArgInfo *ArgInfo, 5091 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5092 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5093 bool isVariadic, bool MethodDefinition); 5094 5095 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5096 // Will search "local" class/category implementations for a method decl. 5097 // Will also search in class's root looking for instance method. 5098 // Returns 0 if no method is found. 5099 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5100 ObjCInterfaceDecl *CDecl); 5101 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5102 ObjCInterfaceDecl *ClassDecl); 5103 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5104 const ObjCObjectPointerType *OPT, 5105 bool IsInstance); 5106 5107 bool inferObjCARCLifetime(ValueDecl *decl); 5108 5109 ExprResult 5110 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5111 Expr *BaseExpr, 5112 SourceLocation OpLoc, 5113 DeclarationName MemberName, 5114 SourceLocation MemberLoc, 5115 SourceLocation SuperLoc, QualType SuperType, 5116 bool Super); 5117 5118 ExprResult 5119 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5120 IdentifierInfo &propertyName, 5121 SourceLocation receiverNameLoc, 5122 SourceLocation propertyNameLoc); 5123 5124 ObjCMethodDecl *tryCaptureObjCSelf(); 5125 5126 /// \brief Describes the kind of message expression indicated by a message 5127 /// send that starts with an identifier. 5128 enum ObjCMessageKind { 5129 /// \brief The message is sent to 'super'. 5130 ObjCSuperMessage, 5131 /// \brief The message is an instance message. 5132 ObjCInstanceMessage, 5133 /// \brief The message is a class message, and the identifier is a type 5134 /// name. 5135 ObjCClassMessage 5136 }; 5137 5138 ObjCMessageKind getObjCMessageKind(Scope *S, 5139 IdentifierInfo *Name, 5140 SourceLocation NameLoc, 5141 bool IsSuper, 5142 bool HasTrailingDot, 5143 ParsedType &ReceiverType); 5144 5145 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5146 Selector Sel, 5147 SourceLocation LBracLoc, 5148 SourceLocation SelectorLoc, 5149 SourceLocation RBracLoc, 5150 MultiExprArg Args); 5151 5152 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5153 QualType ReceiverType, 5154 SourceLocation SuperLoc, 5155 Selector Sel, 5156 ObjCMethodDecl *Method, 5157 SourceLocation LBracLoc, 5158 SourceLocation SelectorLoc, 5159 SourceLocation RBracLoc, 5160 MultiExprArg Args); 5161 5162 ExprResult ActOnClassMessage(Scope *S, 5163 ParsedType Receiver, 5164 Selector Sel, 5165 SourceLocation LBracLoc, 5166 SourceLocation SelectorLoc, 5167 SourceLocation RBracLoc, 5168 MultiExprArg Args); 5169 5170 ExprResult BuildInstanceMessage(Expr *Receiver, 5171 QualType ReceiverType, 5172 SourceLocation SuperLoc, 5173 Selector Sel, 5174 ObjCMethodDecl *Method, 5175 SourceLocation LBracLoc, 5176 SourceLocation SelectorLoc, 5177 SourceLocation RBracLoc, 5178 MultiExprArg Args); 5179 5180 ExprResult ActOnInstanceMessage(Scope *S, 5181 Expr *Receiver, 5182 Selector Sel, 5183 SourceLocation LBracLoc, 5184 SourceLocation SelectorLoc, 5185 SourceLocation RBracLoc, 5186 MultiExprArg Args); 5187 5188 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5189 ObjCBridgeCastKind Kind, 5190 SourceLocation BridgeKeywordLoc, 5191 TypeSourceInfo *TSInfo, 5192 Expr *SubExpr); 5193 5194 ExprResult ActOnObjCBridgedCast(Scope *S, 5195 SourceLocation LParenLoc, 5196 ObjCBridgeCastKind Kind, 5197 SourceLocation BridgeKeywordLoc, 5198 ParsedType Type, 5199 SourceLocation RParenLoc, 5200 Expr *SubExpr); 5201 5202 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5203 5204 /// \brief Check whether the given new method is a valid override of the 5205 /// given overridden method, and set any properties that should be inherited. 5206 /// 5207 /// \returns True if an error occurred. 5208 bool CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5209 const ObjCMethodDecl *Overridden, 5210 bool IsImplementation); 5211 5212 /// \brief Check whether the given method overrides any methods in its class, 5213 /// calling \c CheckObjCMethodOverride for each overridden method. 5214 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5215 5216 enum PragmaOptionsAlignKind { 5217 POAK_Native, // #pragma options align=native 5218 POAK_Natural, // #pragma options align=natural 5219 POAK_Packed, // #pragma options align=packed 5220 POAK_Power, // #pragma options align=power 5221 POAK_Mac68k, // #pragma options align=mac68k 5222 POAK_Reset // #pragma options align=reset 5223 }; 5224 5225 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5226 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5227 SourceLocation PragmaLoc, 5228 SourceLocation KindLoc); 5229 5230 enum PragmaPackKind { 5231 PPK_Default, // #pragma pack([n]) 5232 PPK_Show, // #pragma pack(show), only supported by MSVC. 5233 PPK_Push, // #pragma pack(push, [identifier], [n]) 5234 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5235 }; 5236 5237 enum PragmaMSStructKind { 5238 PMSST_OFF, // #pragms ms_struct off 5239 PMSST_ON // #pragms ms_struct on 5240 }; 5241 5242 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5243 void ActOnPragmaPack(PragmaPackKind Kind, 5244 IdentifierInfo *Name, 5245 Expr *Alignment, 5246 SourceLocation PragmaLoc, 5247 SourceLocation LParenLoc, 5248 SourceLocation RParenLoc); 5249 5250 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5251 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5252 5253 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5254 void ActOnPragmaUnused(const Token &Identifier, 5255 Scope *curScope, 5256 SourceLocation PragmaLoc); 5257 5258 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5259 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 5260 SourceLocation PragmaLoc); 5261 5262 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II); 5263 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5264 5265 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5266 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5267 SourceLocation PragmaLoc, 5268 SourceLocation WeakNameLoc); 5269 5270 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5271 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5272 IdentifierInfo* AliasName, 5273 SourceLocation PragmaLoc, 5274 SourceLocation WeakNameLoc, 5275 SourceLocation AliasNameLoc); 5276 5277 /// ActOnPragmaFPContract - Called on well formed 5278 /// #pragma {STDC,OPENCL} FP_CONTRACT 5279 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5280 5281 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5282 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5283 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5284 5285 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5286 void AddMsStructLayoutForRecord(RecordDecl *RD); 5287 5288 /// FreePackedContext - Deallocate and null out PackContext. 5289 void FreePackedContext(); 5290 5291 /// PushNamespaceVisibilityAttr - Note that we've entered a 5292 /// namespace with a visibility attribute. 5293 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 5294 5295 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5296 /// add an appropriate visibility attribute. 5297 void AddPushedVisibilityAttribute(Decl *RD); 5298 5299 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5300 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5301 void PopPragmaVisibility(); 5302 5303 /// FreeVisContext - Deallocate and null out VisContext. 5304 void FreeVisContext(); 5305 5306 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5307 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, Expr *E); 5308 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, TypeSourceInfo *T); 5309 5310 /// CastCategory - Get the correct forwarded implicit cast result category 5311 /// from the inner expression. 5312 ExprValueKind CastCategory(Expr *E); 5313 5314 /// \brief The kind of conversion being performed. 5315 enum CheckedConversionKind { 5316 /// \brief An implicit conversion. 5317 CCK_ImplicitConversion, 5318 /// \brief A C-style cast. 5319 CCK_CStyleCast, 5320 /// \brief A functional-style cast. 5321 CCK_FunctionalCast, 5322 /// \brief A cast other than a C-style cast. 5323 CCK_OtherCast 5324 }; 5325 5326 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5327 /// cast. If there is already an implicit cast, merge into the existing one. 5328 /// If isLvalue, the result of the cast is an lvalue. 5329 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5330 ExprValueKind VK = VK_RValue, 5331 const CXXCastPath *BasePath = 0, 5332 CheckedConversionKind CCK 5333 = CCK_ImplicitConversion); 5334 5335 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5336 /// to the conversion from scalar type ScalarTy to the Boolean type. 5337 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5338 5339 /// IgnoredValueConversions - Given that an expression's result is 5340 /// syntactically ignored, perform any conversions that are 5341 /// required. 5342 ExprResult IgnoredValueConversions(Expr *E); 5343 5344 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5345 // functions and arrays to their respective pointers (C99 6.3.2.1). 5346 ExprResult UsualUnaryConversions(Expr *E); 5347 5348 // DefaultFunctionArrayConversion - converts functions and arrays 5349 // to their respective pointers (C99 6.3.2.1). 5350 ExprResult DefaultFunctionArrayConversion(Expr *E); 5351 5352 // DefaultFunctionArrayLvalueConversion - converts functions and 5353 // arrays to their respective pointers and performs the 5354 // lvalue-to-rvalue conversion. 5355 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5356 5357 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5358 // the operand. This is DefaultFunctionArrayLvalueConversion, 5359 // except that it assumes the operand isn't of function or array 5360 // type. 5361 ExprResult DefaultLvalueConversion(Expr *E); 5362 5363 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5364 // do not have a prototype. Integer promotions are performed on each 5365 // argument, and arguments that have type float are promoted to double. 5366 ExprResult DefaultArgumentPromotion(Expr *E); 5367 5368 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5369 enum VariadicCallType { 5370 VariadicFunction, 5371 VariadicBlock, 5372 VariadicMethod, 5373 VariadicConstructor, 5374 VariadicDoesNotApply 5375 }; 5376 5377 /// GatherArgumentsForCall - Collector argument expressions for various 5378 /// form of call prototypes. 5379 bool GatherArgumentsForCall(SourceLocation CallLoc, 5380 FunctionDecl *FDecl, 5381 const FunctionProtoType *Proto, 5382 unsigned FirstProtoArg, 5383 Expr **Args, unsigned NumArgs, 5384 SmallVector<Expr *, 8> &AllArgs, 5385 VariadicCallType CallType = VariadicDoesNotApply); 5386 5387 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5388 // will warn if the resulting type is not a POD type. 5389 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5390 FunctionDecl *FDecl); 5391 5392 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5393 // operands and then handles various conversions that are common to binary 5394 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5395 // routine returns the first non-arithmetic type found. The client is 5396 // responsible for emitting appropriate error diagnostics. 5397 QualType UsualArithmeticConversions(ExprResult &lExpr, ExprResult &rExpr, 5398 bool isCompAssign = false); 5399 5400 /// AssignConvertType - All of the 'assignment' semantic checks return this 5401 /// enum to indicate whether the assignment was allowed. These checks are 5402 /// done for simple assignments, as well as initialization, return from 5403 /// function, argument passing, etc. The query is phrased in terms of a 5404 /// source and destination type. 5405 enum AssignConvertType { 5406 /// Compatible - the types are compatible according to the standard. 5407 Compatible, 5408 5409 /// PointerToInt - The assignment converts a pointer to an int, which we 5410 /// accept as an extension. 5411 PointerToInt, 5412 5413 /// IntToPointer - The assignment converts an int to a pointer, which we 5414 /// accept as an extension. 5415 IntToPointer, 5416 5417 /// FunctionVoidPointer - The assignment is between a function pointer and 5418 /// void*, which the standard doesn't allow, but we accept as an extension. 5419 FunctionVoidPointer, 5420 5421 /// IncompatiblePointer - The assignment is between two pointers types that 5422 /// are not compatible, but we accept them as an extension. 5423 IncompatiblePointer, 5424 5425 /// IncompatiblePointer - The assignment is between two pointers types which 5426 /// point to integers which have a different sign, but are otherwise identical. 5427 /// This is a subset of the above, but broken out because it's by far the most 5428 /// common case of incompatible pointers. 5429 IncompatiblePointerSign, 5430 5431 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5432 /// c/v/r qualifiers, which we accept as an extension. 5433 CompatiblePointerDiscardsQualifiers, 5434 5435 /// IncompatiblePointerDiscardsQualifiers - The assignment 5436 /// discards qualifiers that we don't permit to be discarded, 5437 /// like address spaces. 5438 IncompatiblePointerDiscardsQualifiers, 5439 5440 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5441 /// nested pointer types, and the qualifiers other than the first two 5442 /// levels differ e.g. char ** -> const char **, but we accept them as an 5443 /// extension. 5444 IncompatibleNestedPointerQualifiers, 5445 5446 /// IncompatibleVectors - The assignment is between two vector types that 5447 /// have the same size, which we accept as an extension. 5448 IncompatibleVectors, 5449 5450 /// IntToBlockPointer - The assignment converts an int to a block 5451 /// pointer. We disallow this. 5452 IntToBlockPointer, 5453 5454 /// IncompatibleBlockPointer - The assignment is between two block 5455 /// pointers types that are not compatible. 5456 IncompatibleBlockPointer, 5457 5458 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5459 /// id type and something else (that is incompatible with it). For example, 5460 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5461 IncompatibleObjCQualifiedId, 5462 5463 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 5464 /// object with __weak qualifier. 5465 IncompatibleObjCWeakRef, 5466 5467 /// Incompatible - We reject this conversion outright, it is invalid to 5468 /// represent it in the AST. 5469 Incompatible 5470 }; 5471 5472 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5473 /// assignment conversion type specified by ConvTy. This returns true if the 5474 /// conversion was invalid or false if the conversion was accepted. 5475 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5476 SourceLocation Loc, 5477 QualType DstType, QualType SrcType, 5478 Expr *SrcExpr, AssignmentAction Action, 5479 bool *Complained = 0); 5480 5481 /// CheckAssignmentConstraints - Perform type checking for assignment, 5482 /// argument passing, variable initialization, and function return values. 5483 /// C99 6.5.16. 5484 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5485 QualType lhs, QualType rhs); 5486 5487 /// Check assignment constraints and prepare for a conversion of the 5488 /// RHS to the LHS type. 5489 AssignConvertType CheckAssignmentConstraints(QualType lhs, ExprResult &rhs, 5490 CastKind &Kind); 5491 5492 // CheckSingleAssignmentConstraints - Currently used by 5493 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5494 // this routine performs the default function/array converions. 5495 AssignConvertType CheckSingleAssignmentConstraints(QualType lhs, 5496 ExprResult &rExprRes); 5497 5498 // \brief If the lhs type is a transparent union, check whether we 5499 // can initialize the transparent union with the given expression. 5500 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType lhs, 5501 ExprResult &rExpr); 5502 5503 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5504 5505 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5506 5507 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5508 AssignmentAction Action, 5509 bool AllowExplicit = false); 5510 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5511 AssignmentAction Action, 5512 bool AllowExplicit, 5513 ImplicitConversionSequence& ICS); 5514 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5515 const ImplicitConversionSequence& ICS, 5516 AssignmentAction Action, 5517 CheckedConversionKind CCK 5518 = CCK_ImplicitConversion); 5519 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5520 const StandardConversionSequence& SCS, 5521 AssignmentAction Action, 5522 CheckedConversionKind CCK); 5523 5524 /// the following "Check" methods will return a valid/converted QualType 5525 /// or a null QualType (indicating an error diagnostic was issued). 5526 5527 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5528 QualType InvalidOperands(SourceLocation l, ExprResult &lex, ExprResult &rex); 5529 QualType CheckPointerToMemberOperands( // C++ 5.5 5530 ExprResult &lex, ExprResult &rex, ExprValueKind &VK, 5531 SourceLocation OpLoc, bool isIndirect); 5532 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5533 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign, 5534 bool isDivide); 5535 QualType CheckRemainderOperands( // C99 6.5.5 5536 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 5537 QualType CheckAdditionOperands( // C99 6.5.6 5538 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 5539 QualType CheckSubtractionOperands( // C99 6.5.6 5540 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 5541 QualType CheckShiftOperands( // C99 6.5.7 5542 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 5543 bool isCompAssign = false); 5544 QualType CheckCompareOperands( // C99 6.5.8/9 5545 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 5546 bool isRelational); 5547 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 5548 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 5549 QualType CheckLogicalOperands( // C99 6.5.[13,14] 5550 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc); 5551 // CheckAssignmentOperands is used for both simple and compound assignment. 5552 // For simple assignment, pass both expressions and a null converted type. 5553 // For compound assignment, pass both expressions and the converted type. 5554 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 5555 Expr *lex, ExprResult &rex, SourceLocation OpLoc, QualType convertedType); 5556 5557 void ConvertPropertyForLValue(ExprResult &LHS, ExprResult &RHS, QualType& LHSTy); 5558 ExprResult ConvertPropertyForRValue(Expr *E); 5559 5560 QualType CheckConditionalOperands( // C99 6.5.15 5561 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5562 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5563 QualType CXXCheckConditionalOperands( // C++ 5.16 5564 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5565 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5566 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 5567 bool *NonStandardCompositeType = 0); 5568 QualType FindCompositePointerType(SourceLocation Loc, ExprResult &E1, ExprResult &E2, 5569 bool *NonStandardCompositeType = 0) { 5570 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 5571 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, NonStandardCompositeType); 5572 E1 = Owned(E1Tmp); 5573 E2 = Owned(E2Tmp); 5574 return Composite; 5575 } 5576 5577 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5578 SourceLocation questionLoc); 5579 5580 bool DiagnoseConditionalForNull(Expr *LHS, Expr *RHS, 5581 SourceLocation QuestionLoc); 5582 5583 /// type checking for vector binary operators. 5584 QualType CheckVectorOperands(ExprResult &lex, ExprResult &rex, 5585 SourceLocation Loc, bool isCompAssign); 5586 QualType CheckVectorCompareOperands(ExprResult &lex, ExprResult &rx, 5587 SourceLocation l, bool isRel); 5588 5589 /// type checking declaration initializers (C99 6.7.8) 5590 bool CheckInitList(const InitializedEntity &Entity, 5591 InitListExpr *&InitList, QualType &DeclType); 5592 bool CheckForConstantInitializer(Expr *e, QualType t); 5593 5594 // type checking C++ declaration initializers (C++ [dcl.init]). 5595 5596 /// ReferenceCompareResult - Expresses the result of comparing two 5597 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5598 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5599 enum ReferenceCompareResult { 5600 /// Ref_Incompatible - The two types are incompatible, so direct 5601 /// reference binding is not possible. 5602 Ref_Incompatible = 0, 5603 /// Ref_Related - The two types are reference-related, which means 5604 /// that their unqualified forms (T1 and T2) are either the same 5605 /// or T1 is a base class of T2. 5606 Ref_Related, 5607 /// Ref_Compatible_With_Added_Qualification - The two types are 5608 /// reference-compatible with added qualification, meaning that 5609 /// they are reference-compatible and the qualifiers on T1 (cv1) 5610 /// are greater than the qualifiers on T2 (cv2). 5611 Ref_Compatible_With_Added_Qualification, 5612 /// Ref_Compatible - The two types are reference-compatible and 5613 /// have equivalent qualifiers (cv1 == cv2). 5614 Ref_Compatible 5615 }; 5616 5617 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 5618 QualType T1, QualType T2, 5619 bool &DerivedToBase, 5620 bool &ObjCConversion, 5621 bool &ObjCLifetimeConversion); 5622 5623 /// CheckCastTypes - Check type constraints for casting between types under 5624 /// C semantics, or forward to CXXCheckCStyleCast in C++. 5625 ExprResult CheckCastTypes(SourceLocation CastStartLoc, SourceRange TyRange, 5626 QualType CastTy, Expr *CastExpr, CastKind &Kind, 5627 ExprValueKind &VK, CXXCastPath &BasePath, 5628 bool FunctionalStyle = false); 5629 5630 ExprResult checkUnknownAnyCast(SourceRange TyRange, QualType castType, 5631 Expr *castExpr, CastKind &castKind, 5632 ExprValueKind &valueKind, CXXCastPath &BasePath); 5633 5634 // CheckVectorCast - check type constraints for vectors. 5635 // Since vectors are an extension, there are no C standard reference for this. 5636 // We allow casting between vectors and integer datatypes of the same size. 5637 // returns true if the cast is invalid 5638 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 5639 CastKind &Kind); 5640 5641 // CheckExtVectorCast - check type constraints for extended vectors. 5642 // Since vectors are an extension, there are no C standard reference for this. 5643 // We allow casting between vectors and integer datatypes of the same size, 5644 // or vectors and the element type of that vector. 5645 // returns the cast expr 5646 ExprResult CheckExtVectorCast(SourceRange R, QualType VectorTy, Expr *CastExpr, 5647 CastKind &Kind); 5648 5649 /// CXXCheckCStyleCast - Check constraints of a C-style or function-style 5650 /// cast under C++ semantics. 5651 ExprResult CXXCheckCStyleCast(SourceRange R, QualType CastTy, ExprValueKind &VK, 5652 Expr *CastExpr, CastKind &Kind, 5653 CXXCastPath &BasePath, bool FunctionalStyle); 5654 5655 /// \brief Checks for valid expressions which can be cast to an ObjC 5656 /// pointer without needing a bridge cast. 5657 bool ValidObjCARCNoBridgeCastExpr(Expr *&Exp, QualType castType); 5658 5659 /// \brief Checks for invalid conversions and casts between 5660 /// retainable pointers and other pointer kinds. 5661 void CheckObjCARCConversion(SourceRange castRange, QualType castType, 5662 Expr *&op, CheckedConversionKind CCK); 5663 5664 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 5665 QualType ExprType); 5666 5667 /// checkRetainCycles - Check whether an Objective-C message send 5668 /// might create an obvious retain cycle. 5669 void checkRetainCycles(ObjCMessageExpr *msg); 5670 void checkRetainCycles(Expr *receiver, Expr *argument); 5671 5672 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 5673 /// to weak/__unsafe_unretained type. 5674 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 5675 5676 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 5677 /// to weak/__unsafe_unretained expression. 5678 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 5679 5680 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 5681 /// \param Method - May be null. 5682 /// \param [out] ReturnType - The return type of the send. 5683 /// \return true iff there were any incompatible types. 5684 bool CheckMessageArgumentTypes(QualType ReceiverType, 5685 Expr **Args, unsigned NumArgs, Selector Sel, 5686 ObjCMethodDecl *Method, bool isClassMessage, 5687 bool isSuperMessage, 5688 SourceLocation lbrac, SourceLocation rbrac, 5689 QualType &ReturnType, ExprValueKind &VK); 5690 5691 /// \brief Determine the result of a message send expression based on 5692 /// the type of the receiver, the method expected to receive the message, 5693 /// and the form of the message send. 5694 QualType getMessageSendResultType(QualType ReceiverType, 5695 ObjCMethodDecl *Method, 5696 bool isClassMessage, bool isSuperMessage); 5697 5698 /// \brief If the given expression involves a message send to a method 5699 /// with a related result type, emit a note describing what happened. 5700 void EmitRelatedResultTypeNote(const Expr *E); 5701 5702 /// CheckBooleanCondition - Diagnose problems involving the use of 5703 /// the given expression as a boolean condition (e.g. in an if 5704 /// statement). Also performs the standard function and array 5705 /// decays, possibly changing the input variable. 5706 /// 5707 /// \param Loc - A location associated with the condition, e.g. the 5708 /// 'if' keyword. 5709 /// \return true iff there were any errors 5710 ExprResult CheckBooleanCondition(Expr *CondExpr, SourceLocation Loc); 5711 5712 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 5713 Expr *SubExpr); 5714 5715 /// DiagnoseAssignmentAsCondition - Given that an expression is 5716 /// being used as a boolean condition, warn if it's an assignment. 5717 void DiagnoseAssignmentAsCondition(Expr *E); 5718 5719 /// \brief Redundant parentheses over an equality comparison can indicate 5720 /// that the user intended an assignment used as condition. 5721 void DiagnoseEqualityWithExtraParens(ParenExpr *parenE); 5722 5723 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 5724 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 5725 5726 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 5727 /// the specified width and sign. If an overflow occurs, detect it and emit 5728 /// the specified diagnostic. 5729 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 5730 unsigned NewWidth, bool NewSign, 5731 SourceLocation Loc, unsigned DiagID); 5732 5733 /// Checks that the Objective-C declaration is declared in the global scope. 5734 /// Emits an error and marks the declaration as invalid if it's not declared 5735 /// in the global scope. 5736 bool CheckObjCDeclScope(Decl *D); 5737 5738 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 5739 /// and reports the appropriate diagnostics. Returns false on success. 5740 /// Can optionally return the value of the expression. 5741 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 5742 5743 /// VerifyBitField - verifies that a bit field expression is an ICE and has 5744 /// the correct width, and that the field type is valid. 5745 /// Returns false on success. 5746 /// Can optionally return whether the bit-field is of width 0 5747 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 5748 QualType FieldTy, const Expr *BitWidth, 5749 bool *ZeroWidth = 0); 5750 5751 /// \name Code completion 5752 //@{ 5753 /// \brief Describes the context in which code completion occurs. 5754 enum ParserCompletionContext { 5755 /// \brief Code completion occurs at top-level or namespace context. 5756 PCC_Namespace, 5757 /// \brief Code completion occurs within a class, struct, or union. 5758 PCC_Class, 5759 /// \brief Code completion occurs within an Objective-C interface, protocol, 5760 /// or category. 5761 PCC_ObjCInterface, 5762 /// \brief Code completion occurs within an Objective-C implementation or 5763 /// category implementation 5764 PCC_ObjCImplementation, 5765 /// \brief Code completion occurs within the list of instance variables 5766 /// in an Objective-C interface, protocol, category, or implementation. 5767 PCC_ObjCInstanceVariableList, 5768 /// \brief Code completion occurs following one or more template 5769 /// headers. 5770 PCC_Template, 5771 /// \brief Code completion occurs following one or more template 5772 /// headers within a class. 5773 PCC_MemberTemplate, 5774 /// \brief Code completion occurs within an expression. 5775 PCC_Expression, 5776 /// \brief Code completion occurs within a statement, which may 5777 /// also be an expression or a declaration. 5778 PCC_Statement, 5779 /// \brief Code completion occurs at the beginning of the 5780 /// initialization statement (or expression) in a for loop. 5781 PCC_ForInit, 5782 /// \brief Code completion occurs within the condition of an if, 5783 /// while, switch, or for statement. 5784 PCC_Condition, 5785 /// \brief Code completion occurs within the body of a function on a 5786 /// recovery path, where we do not have a specific handle on our position 5787 /// in the grammar. 5788 PCC_RecoveryInFunction, 5789 /// \brief Code completion occurs where only a type is permitted. 5790 PCC_Type, 5791 /// \brief Code completion occurs in a parenthesized expression, which 5792 /// might also be a type cast. 5793 PCC_ParenthesizedExpression, 5794 /// \brief Code completion occurs within a sequence of declaration 5795 /// specifiers within a function, method, or block. 5796 PCC_LocalDeclarationSpecifiers 5797 }; 5798 5799 void CodeCompleteOrdinaryName(Scope *S, 5800 ParserCompletionContext CompletionContext); 5801 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 5802 bool AllowNonIdentifiers, 5803 bool AllowNestedNameSpecifiers); 5804 5805 struct CodeCompleteExpressionData; 5806 void CodeCompleteExpression(Scope *S, 5807 const CodeCompleteExpressionData &Data); 5808 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 5809 SourceLocation OpLoc, 5810 bool IsArrow); 5811 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 5812 void CodeCompleteTag(Scope *S, unsigned TagSpec); 5813 void CodeCompleteTypeQualifiers(DeclSpec &DS); 5814 void CodeCompleteCase(Scope *S); 5815 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 5816 void CodeCompleteInitializer(Scope *S, Decl *D); 5817 void CodeCompleteReturn(Scope *S); 5818 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 5819 5820 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 5821 bool EnteringContext); 5822 void CodeCompleteUsing(Scope *S); 5823 void CodeCompleteUsingDirective(Scope *S); 5824 void CodeCompleteNamespaceDecl(Scope *S); 5825 void CodeCompleteNamespaceAliasDecl(Scope *S); 5826 void CodeCompleteOperatorName(Scope *S); 5827 void CodeCompleteConstructorInitializer(Decl *Constructor, 5828 CXXCtorInitializer** Initializers, 5829 unsigned NumInitializers); 5830 5831 void CodeCompleteObjCAtDirective(Scope *S, Decl *ObjCImpDecl, 5832 bool InInterface); 5833 void CodeCompleteObjCAtVisibility(Scope *S); 5834 void CodeCompleteObjCAtStatement(Scope *S); 5835 void CodeCompleteObjCAtExpression(Scope *S); 5836 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 5837 void CodeCompleteObjCPropertyGetter(Scope *S, Decl *ClassDecl); 5838 void CodeCompleteObjCPropertySetter(Scope *S, Decl *ClassDecl); 5839 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 5840 bool IsParameter); 5841 void CodeCompleteObjCMessageReceiver(Scope *S); 5842 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 5843 IdentifierInfo **SelIdents, 5844 unsigned NumSelIdents, 5845 bool AtArgumentExpression); 5846 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 5847 IdentifierInfo **SelIdents, 5848 unsigned NumSelIdents, 5849 bool AtArgumentExpression, 5850 bool IsSuper = false); 5851 void CodeCompleteObjCInstanceMessage(Scope *S, ExprTy *Receiver, 5852 IdentifierInfo **SelIdents, 5853 unsigned NumSelIdents, 5854 bool AtArgumentExpression, 5855 ObjCInterfaceDecl *Super = 0); 5856 void CodeCompleteObjCForCollection(Scope *S, 5857 DeclGroupPtrTy IterationVar); 5858 void CodeCompleteObjCSelector(Scope *S, 5859 IdentifierInfo **SelIdents, 5860 unsigned NumSelIdents); 5861 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 5862 unsigned NumProtocols); 5863 void CodeCompleteObjCProtocolDecl(Scope *S); 5864 void CodeCompleteObjCInterfaceDecl(Scope *S); 5865 void CodeCompleteObjCSuperclass(Scope *S, 5866 IdentifierInfo *ClassName, 5867 SourceLocation ClassNameLoc); 5868 void CodeCompleteObjCImplementationDecl(Scope *S); 5869 void CodeCompleteObjCInterfaceCategory(Scope *S, 5870 IdentifierInfo *ClassName, 5871 SourceLocation ClassNameLoc); 5872 void CodeCompleteObjCImplementationCategory(Scope *S, 5873 IdentifierInfo *ClassName, 5874 SourceLocation ClassNameLoc); 5875 void CodeCompleteObjCPropertyDefinition(Scope *S, Decl *ObjCImpDecl); 5876 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 5877 IdentifierInfo *PropertyName, 5878 Decl *ObjCImpDecl); 5879 void CodeCompleteObjCMethodDecl(Scope *S, 5880 bool IsInstanceMethod, 5881 ParsedType ReturnType, 5882 Decl *IDecl); 5883 void CodeCompleteObjCMethodDeclSelector(Scope *S, 5884 bool IsInstanceMethod, 5885 bool AtParameterName, 5886 ParsedType ReturnType, 5887 IdentifierInfo **SelIdents, 5888 unsigned NumSelIdents); 5889 void CodeCompletePreprocessorDirective(bool InConditional); 5890 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 5891 void CodeCompletePreprocessorMacroName(bool IsDefinition); 5892 void CodeCompletePreprocessorExpression(); 5893 void CodeCompletePreprocessorMacroArgument(Scope *S, 5894 IdentifierInfo *Macro, 5895 MacroInfo *MacroInfo, 5896 unsigned Argument); 5897 void CodeCompleteNaturalLanguage(); 5898 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 5899 SmallVectorImpl<CodeCompletionResult> &Results); 5900 //@} 5901 5902 //===--------------------------------------------------------------------===// 5903 // Extra semantic analysis beyond the C type system 5904 5905public: 5906 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 5907 unsigned ByteNo) const; 5908 5909private: 5910 void CheckArrayAccess(const Expr *E); 5911 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 5912 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 5913 5914 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 5915 bool CheckObjCString(Expr *Arg); 5916 5917 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5918 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5919 5920 bool SemaBuiltinVAStart(CallExpr *TheCall); 5921 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 5922 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 5923 5924public: 5925 // Used by C++ template instantiation. 5926 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 5927 5928private: 5929 bool SemaBuiltinPrefetch(CallExpr *TheCall); 5930 bool SemaBuiltinObjectSize(CallExpr *TheCall); 5931 bool SemaBuiltinLongjmp(CallExpr *TheCall); 5932 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 5933 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 5934 llvm::APSInt &Result); 5935 5936 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 5937 bool HasVAListArg, unsigned format_idx, 5938 unsigned firstDataArg, bool isPrintf); 5939 5940 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 5941 const CallExpr *TheCall, bool HasVAListArg, 5942 unsigned format_idx, unsigned firstDataArg, 5943 bool isPrintf); 5944 5945 void CheckNonNullArguments(const NonNullAttr *NonNull, 5946 const Expr * const *ExprArgs, 5947 SourceLocation CallSiteLoc); 5948 5949 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 5950 unsigned format_idx, unsigned firstDataArg, 5951 bool isPrintf); 5952 5953 /// \brief Enumeration used to describe which of the memory setting or copying 5954 /// functions is being checked by \c CheckMemsetcpymoveArguments(). 5955 enum CheckedMemoryFunction { 5956 CMF_Memset, 5957 CMF_Memcpy, 5958 CMF_Memmove 5959 }; 5960 5961 void CheckMemsetcpymoveArguments(const CallExpr *Call, 5962 CheckedMemoryFunction CMF, 5963 IdentifierInfo *FnName); 5964 5965 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 5966 SourceLocation ReturnLoc); 5967 void CheckFloatComparison(SourceLocation loc, Expr* lex, Expr* rex); 5968 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 5969 5970 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 5971 Expr *Init); 5972 5973 /// \brief The parser's current scope. 5974 /// 5975 /// The parser maintains this state here. 5976 Scope *CurScope; 5977 5978protected: 5979 friend class Parser; 5980 friend class InitializationSequence; 5981 friend class ASTReader; 5982 friend class ASTWriter; 5983 5984public: 5985 /// \brief Retrieve the parser's current scope. 5986 /// 5987 /// This routine must only be used when it is certain that semantic analysis 5988 /// and the parser are in precisely the same context, which is not the case 5989 /// when, e.g., we are performing any kind of template instantiation. 5990 /// Therefore, the only safe places to use this scope are in the parser 5991 /// itself and in routines directly invoked from the parser and *never* from 5992 /// template substitution or instantiation. 5993 Scope *getCurScope() const { return CurScope; } 5994}; 5995 5996/// \brief RAII object that enters a new expression evaluation context. 5997class EnterExpressionEvaluationContext { 5998 Sema &Actions; 5999 6000public: 6001 EnterExpressionEvaluationContext(Sema &Actions, 6002 Sema::ExpressionEvaluationContext NewContext) 6003 : Actions(Actions) { 6004 Actions.PushExpressionEvaluationContext(NewContext); 6005 } 6006 6007 ~EnterExpressionEvaluationContext() { 6008 Actions.PopExpressionEvaluationContext(); 6009 } 6010}; 6011 6012} // end namespace clang 6013 6014#endif 6015