Sema.h revision 1cb4f664fd4f72a65a145e9ff8a7e2540ab09156
1//===--- Sema.h - Semantic Analysis & AST Building --------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Sema class, which performs semantic analysis and 11// builds ASTs. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef LLVM_CLANG_SEMA_SEMA_H 16#define LLVM_CLANG_SEMA_SEMA_H 17 18#include "clang/Sema/Ownership.h" 19#include "clang/Sema/AnalysisBasedWarnings.h" 20#include "clang/Sema/IdentifierResolver.h" 21#include "clang/Sema/ObjCMethodList.h" 22#include "clang/Sema/DeclSpec.h" 23#include "clang/Sema/ExternalSemaSource.h" 24#include "clang/Sema/LocInfoType.h" 25#include "clang/Sema/TypoCorrection.h" 26#include "clang/Sema/Weak.h" 27#include "clang/AST/Expr.h" 28#include "clang/AST/DeclarationName.h" 29#include "clang/AST/ExternalASTSource.h" 30#include "clang/AST/TypeLoc.h" 31#include "clang/Basic/Specifiers.h" 32#include "clang/Basic/TemplateKinds.h" 33#include "clang/Basic/TypeTraits.h" 34#include "clang/Basic/ExpressionTraits.h" 35#include "llvm/ADT/OwningPtr.h" 36#include "llvm/ADT/SmallPtrSet.h" 37#include "llvm/ADT/SmallVector.h" 38#include <deque> 39#include <string> 40 41namespace llvm { 42 class APSInt; 43 template <typename ValueT> struct DenseMapInfo; 44 template <typename ValueT, typename ValueInfoT> class DenseSet; 45} 46 47namespace clang { 48 class ADLResult; 49 class ASTConsumer; 50 class ASTContext; 51 class ASTMutationListener; 52 class ASTReader; 53 class ASTWriter; 54 class ArrayType; 55 class AttributeList; 56 class BlockDecl; 57 class CXXBasePath; 58 class CXXBasePaths; 59 typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 60 class CXXConstructorDecl; 61 class CXXConversionDecl; 62 class CXXDestructorDecl; 63 class CXXFieldCollector; 64 class CXXMemberCallExpr; 65 class CXXMethodDecl; 66 class CXXScopeSpec; 67 class CXXTemporary; 68 class CXXTryStmt; 69 class CallExpr; 70 class ClassTemplateDecl; 71 class ClassTemplatePartialSpecializationDecl; 72 class ClassTemplateSpecializationDecl; 73 class CodeCompleteConsumer; 74 class CodeCompletionAllocator; 75 class CodeCompletionResult; 76 class Decl; 77 class DeclAccessPair; 78 class DeclContext; 79 class DeclRefExpr; 80 class DeclaratorDecl; 81 class DeducedTemplateArgument; 82 class DependentDiagnostic; 83 class DesignatedInitExpr; 84 class Designation; 85 class EnumConstantDecl; 86 class Expr; 87 class ExtVectorType; 88 class ExternalSemaSource; 89 class FormatAttr; 90 class FriendDecl; 91 class FunctionDecl; 92 class FunctionProtoType; 93 class FunctionTemplateDecl; 94 class ImplicitConversionSequence; 95 class InitListExpr; 96 class InitializationKind; 97 class InitializationSequence; 98 class InitializedEntity; 99 class IntegerLiteral; 100 class LabelStmt; 101 class LangOptions; 102 class LocalInstantiationScope; 103 class LookupResult; 104 class MacroInfo; 105 class MultiLevelTemplateArgumentList; 106 class NamedDecl; 107 class NonNullAttr; 108 class ObjCCategoryDecl; 109 class ObjCCategoryImplDecl; 110 class ObjCCompatibleAliasDecl; 111 class ObjCContainerDecl; 112 class ObjCImplDecl; 113 class ObjCImplementationDecl; 114 class ObjCInterfaceDecl; 115 class ObjCIvarDecl; 116 template <class T> class ObjCList; 117 class ObjCMessageExpr; 118 class ObjCMethodDecl; 119 class ObjCPropertyDecl; 120 class ObjCProtocolDecl; 121 class OverloadCandidateSet; 122 class OverloadExpr; 123 class ParenListExpr; 124 class ParmVarDecl; 125 class Preprocessor; 126 class PseudoDestructorTypeStorage; 127 class QualType; 128 class StandardConversionSequence; 129 class Stmt; 130 class StringLiteral; 131 class SwitchStmt; 132 class TargetAttributesSema; 133 class TemplateArgument; 134 class TemplateArgumentList; 135 class TemplateArgumentLoc; 136 class TemplateDecl; 137 class TemplateParameterList; 138 class TemplatePartialOrderingContext; 139 class TemplateTemplateParmDecl; 140 class Token; 141 class TypeAliasDecl; 142 class TypedefDecl; 143 class TypedefNameDecl; 144 class TypeLoc; 145 class UnqualifiedId; 146 class UnresolvedLookupExpr; 147 class UnresolvedMemberExpr; 148 class UnresolvedSetImpl; 149 class UnresolvedSetIterator; 150 class UsingDecl; 151 class UsingShadowDecl; 152 class ValueDecl; 153 class VarDecl; 154 class VisibilityAttr; 155 class VisibleDeclConsumer; 156 class IndirectFieldDecl; 157 158namespace sema { 159 class AccessedEntity; 160 class BlockScopeInfo; 161 class DelayedDiagnostic; 162 class FunctionScopeInfo; 163 class TemplateDeductionInfo; 164} 165 166// FIXME: No way to easily map from TemplateTypeParmTypes to 167// TemplateTypeParmDecls, so we have this horrible PointerUnion. 168typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 169 SourceLocation> UnexpandedParameterPack; 170 171/// Sema - This implements semantic analysis and AST building for C. 172class Sema { 173 Sema(const Sema&); // DO NOT IMPLEMENT 174 void operator=(const Sema&); // DO NOT IMPLEMENT 175 mutable const TargetAttributesSema* TheTargetAttributesSema; 176public: 177 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 178 typedef OpaquePtr<TemplateName> TemplateTy; 179 typedef OpaquePtr<QualType> TypeTy; 180 typedef Attr AttrTy; 181 typedef CXXBaseSpecifier BaseTy; 182 typedef CXXCtorInitializer MemInitTy; 183 typedef Expr ExprTy; 184 typedef Stmt StmtTy; 185 typedef TemplateParameterList TemplateParamsTy; 186 typedef NestedNameSpecifier CXXScopeTy; 187 188 OpenCLOptions OpenCLFeatures; 189 FPOptions FPFeatures; 190 191 const LangOptions &LangOpts; 192 Preprocessor &PP; 193 ASTContext &Context; 194 ASTConsumer &Consumer; 195 Diagnostic &Diags; 196 SourceManager &SourceMgr; 197 198 /// \brief Flag indicating whether or not to collect detailed statistics. 199 bool CollectStats; 200 201 /// \brief Source of additional semantic information. 202 ExternalSemaSource *ExternalSource; 203 204 /// \brief Code-completion consumer. 205 CodeCompleteConsumer *CodeCompleter; 206 207 /// CurContext - This is the current declaration context of parsing. 208 DeclContext *CurContext; 209 210 /// VAListTagName - The declaration name corresponding to __va_list_tag. 211 /// This is used as part of a hack to omit that class from ADL results. 212 DeclarationName VAListTagName; 213 214 /// PackContext - Manages the stack for #pragma pack. An alignment 215 /// of 0 indicates default alignment. 216 void *PackContext; // Really a "PragmaPackStack*" 217 218 bool MSStructPragmaOn; // True when #pragma ms_struct on 219 220 /// VisContext - Manages the stack for #pragma GCC visibility. 221 void *VisContext; // Really a "PragmaVisStack*" 222 223 /// ExprNeedsCleanups - True if the current evaluation context 224 /// requires cleanups to be run at its conclusion. 225 bool ExprNeedsCleanups; 226 227 /// \brief Stack containing information about each of the nested 228 /// function, block, and method scopes that are currently active. 229 /// 230 /// This array is never empty. Clients should ignore the first 231 /// element, which is used to cache a single FunctionScopeInfo 232 /// that's used to parse every top-level function. 233 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 234 235 /// ExprTemporaries - This is the stack of temporaries that are created by 236 /// the current full expression. 237 SmallVector<CXXTemporary*, 8> ExprTemporaries; 238 239 typedef LazyVector<TypedefNameDecl *, ExternalSemaSource, 240 &ExternalSemaSource::ReadExtVectorDecls, 2, 2> 241 ExtVectorDeclsType; 242 243 /// ExtVectorDecls - This is a list all the extended vector types. This allows 244 /// us to associate a raw vector type with one of the ext_vector type names. 245 /// This is only necessary for issuing pretty diagnostics. 246 ExtVectorDeclsType ExtVectorDecls; 247 248 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 249 llvm::OwningPtr<CXXFieldCollector> FieldCollector; 250 251 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 252 253 /// PureVirtualClassDiagSet - a set of class declarations which we have 254 /// emitted a list of pure virtual functions. Used to prevent emitting the 255 /// same list more than once. 256 llvm::OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 257 258 /// ParsingInitForAutoVars - a set of declarations with auto types for which 259 /// we are currently parsing the initializer. 260 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 261 262 /// \brief A mapping from external names to the most recent 263 /// locally-scoped external declaration with that name. 264 /// 265 /// This map contains external declarations introduced in local 266 /// scoped, e.g., 267 /// 268 /// \code 269 /// void f() { 270 /// void foo(int, int); 271 /// } 272 /// \endcode 273 /// 274 /// Here, the name "foo" will be associated with the declaration on 275 /// "foo" within f. This name is not visible outside of 276 /// "f". However, we still find it in two cases: 277 /// 278 /// - If we are declaring another external with the name "foo", we 279 /// can find "foo" as a previous declaration, so that the types 280 /// of this external declaration can be checked for 281 /// compatibility. 282 /// 283 /// - If we would implicitly declare "foo" (e.g., due to a call to 284 /// "foo" in C when no prototype or definition is visible), then 285 /// we find this declaration of "foo" and complain that it is 286 /// not visible. 287 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 288 289 /// \brief Look for a locally scoped external declaration by the given name. 290 llvm::DenseMap<DeclarationName, NamedDecl *>::iterator 291 findLocallyScopedExternalDecl(DeclarationName Name); 292 293 typedef LazyVector<VarDecl *, ExternalSemaSource, 294 &ExternalSemaSource::ReadTentativeDefinitions, 2, 2> 295 TentativeDefinitionsType; 296 297 /// \brief All the tentative definitions encountered in the TU. 298 TentativeDefinitionsType TentativeDefinitions; 299 300 typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource, 301 &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2> 302 UnusedFileScopedDeclsType; 303 304 /// \brief The set of file scoped decls seen so far that have not been used 305 /// and must warn if not used. Only contains the first declaration. 306 UnusedFileScopedDeclsType UnusedFileScopedDecls; 307 308 typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource, 309 &ExternalSemaSource::ReadDelegatingConstructors, 2, 2> 310 DelegatingCtorDeclsType; 311 312 /// \brief All the delegating constructors seen so far in the file, used for 313 /// cycle detection at the end of the TU. 314 DelegatingCtorDeclsType DelegatingCtorDecls; 315 316 /// \brief All the overriding destructors seen during a class definition 317 /// (there could be multiple due to nested classes) that had their exception 318 /// spec checks delayed, plus the overridden destructor. 319 SmallVector<std::pair<const CXXDestructorDecl*, 320 const CXXDestructorDecl*>, 2> 321 DelayedDestructorExceptionSpecChecks; 322 323 /// \brief Callback to the parser to parse templated functions when needed. 324 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 325 LateTemplateParserCB *LateTemplateParser; 326 void *OpaqueParser; 327 328 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 329 LateTemplateParser = LTP; 330 OpaqueParser = P; 331 } 332 333 class DelayedDiagnostics; 334 335 class ParsingDeclState { 336 unsigned SavedStackSize; 337 friend class Sema::DelayedDiagnostics; 338 }; 339 340 class ProcessingContextState { 341 unsigned SavedParsingDepth; 342 unsigned SavedActiveStackBase; 343 friend class Sema::DelayedDiagnostics; 344 }; 345 346 /// A class which encapsulates the logic for delaying diagnostics 347 /// during parsing and other processing. 348 class DelayedDiagnostics { 349 /// \brief The stack of diagnostics that were delayed due to being 350 /// produced during the parsing of a declaration. 351 sema::DelayedDiagnostic *Stack; 352 353 /// \brief The number of objects on the delayed-diagnostics stack. 354 unsigned StackSize; 355 356 /// \brief The current capacity of the delayed-diagnostics stack. 357 unsigned StackCapacity; 358 359 /// \brief The index of the first "active" delayed diagnostic in 360 /// the stack. When parsing class definitions, we ignore active 361 /// delayed diagnostics from the surrounding context. 362 unsigned ActiveStackBase; 363 364 /// \brief The depth of the declarations we're currently parsing. 365 /// This gets saved and reset whenever we enter a class definition. 366 unsigned ParsingDepth; 367 368 public: 369 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 370 ActiveStackBase(0), ParsingDepth(0) {} 371 372 ~DelayedDiagnostics() { 373 delete[] reinterpret_cast<char*>(Stack); 374 } 375 376 /// Adds a delayed diagnostic. 377 void add(const sema::DelayedDiagnostic &diag); 378 379 /// Determines whether diagnostics should be delayed. 380 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 381 382 /// Observe that we've started parsing a declaration. Access and 383 /// deprecation diagnostics will be delayed; when the declaration 384 /// is completed, all active delayed diagnostics will be evaluated 385 /// in its context, and then active diagnostics stack will be 386 /// popped down to the saved depth. 387 ParsingDeclState pushParsingDecl() { 388 ParsingDepth++; 389 390 ParsingDeclState state; 391 state.SavedStackSize = StackSize; 392 return state; 393 } 394 395 /// Observe that we're completed parsing a declaration. 396 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 397 398 /// Observe that we've started processing a different context, the 399 /// contents of which are semantically separate from the 400 /// declarations it may lexically appear in. This sets aside the 401 /// current stack of active diagnostics and starts afresh. 402 ProcessingContextState pushContext() { 403 assert(StackSize >= ActiveStackBase); 404 405 ProcessingContextState state; 406 state.SavedParsingDepth = ParsingDepth; 407 state.SavedActiveStackBase = ActiveStackBase; 408 409 ActiveStackBase = StackSize; 410 ParsingDepth = 0; 411 412 return state; 413 } 414 415 /// Observe that we've stopped processing a context. This 416 /// restores the previous stack of active diagnostics. 417 void popContext(ProcessingContextState state) { 418 assert(ActiveStackBase == StackSize); 419 assert(ParsingDepth == 0); 420 ActiveStackBase = state.SavedActiveStackBase; 421 ParsingDepth = state.SavedParsingDepth; 422 } 423 } DelayedDiagnostics; 424 425 /// A RAII object to temporarily push a declaration context. 426 class ContextRAII { 427 private: 428 Sema &S; 429 DeclContext *SavedContext; 430 ProcessingContextState SavedContextState; 431 432 public: 433 ContextRAII(Sema &S, DeclContext *ContextToPush) 434 : S(S), SavedContext(S.CurContext), 435 SavedContextState(S.DelayedDiagnostics.pushContext()) 436 { 437 assert(ContextToPush && "pushing null context"); 438 S.CurContext = ContextToPush; 439 } 440 441 void pop() { 442 if (!SavedContext) return; 443 S.CurContext = SavedContext; 444 S.DelayedDiagnostics.popContext(SavedContextState); 445 SavedContext = 0; 446 } 447 448 ~ContextRAII() { 449 pop(); 450 } 451 }; 452 453 /// WeakUndeclaredIdentifiers - Identifiers contained in 454 /// #pragma weak before declared. rare. may alias another 455 /// identifier, declared or undeclared 456 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 457 458 /// \brief Load weak undeclared identifiers from the external source. 459 void LoadExternalWeakUndeclaredIdentifiers(); 460 461 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 462 /// #pragma weak during processing of other Decls. 463 /// I couldn't figure out a clean way to generate these in-line, so 464 /// we store them here and handle separately -- which is a hack. 465 /// It would be best to refactor this. 466 SmallVector<Decl*,2> WeakTopLevelDecl; 467 468 IdentifierResolver IdResolver; 469 470 /// Translation Unit Scope - useful to Objective-C actions that need 471 /// to lookup file scope declarations in the "ordinary" C decl namespace. 472 /// For example, user-defined classes, built-in "id" type, etc. 473 Scope *TUScope; 474 475 /// \brief The C++ "std" namespace, where the standard library resides. 476 LazyDeclPtr StdNamespace; 477 478 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 479 /// standard library. 480 LazyDeclPtr StdBadAlloc; 481 482 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 483 RecordDecl *CXXTypeInfoDecl; 484 485 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 486 RecordDecl *MSVCGuidDecl; 487 488 /// A flag to remember whether the implicit forms of operator new and delete 489 /// have been declared. 490 bool GlobalNewDeleteDeclared; 491 492 /// \brief The set of declarations that have been referenced within 493 /// a potentially evaluated expression. 494 typedef SmallVector<std::pair<SourceLocation, Decl *>, 10> 495 PotentiallyReferencedDecls; 496 497 /// \brief A set of diagnostics that may be emitted. 498 typedef SmallVector<std::pair<SourceLocation, PartialDiagnostic>, 10> 499 PotentiallyEmittedDiagnostics; 500 501 /// \brief Describes how the expressions currently being parsed are 502 /// evaluated at run-time, if at all. 503 enum ExpressionEvaluationContext { 504 /// \brief The current expression and its subexpressions occur within an 505 /// unevaluated operand (C++0x [expr]p8), such as a constant expression 506 /// or the subexpression of \c sizeof, where the type or the value of the 507 /// expression may be significant but no code will be generated to evaluate 508 /// the value of the expression at run time. 509 Unevaluated, 510 511 /// \brief The current expression is potentially evaluated at run time, 512 /// which means that code may be generated to evaluate the value of the 513 /// expression at run time. 514 PotentiallyEvaluated, 515 516 /// \brief The current expression may be potentially evaluated or it may 517 /// be unevaluated, but it is impossible to tell from the lexical context. 518 /// This evaluation context is used primary for the operand of the C++ 519 /// \c typeid expression, whose argument is potentially evaluated only when 520 /// it is an lvalue of polymorphic class type (C++ [basic.def.odr]p2). 521 PotentiallyPotentiallyEvaluated, 522 523 /// \brief The current expression is potentially evaluated, but any 524 /// declarations referenced inside that expression are only used if 525 /// in fact the current expression is used. 526 /// 527 /// This value is used when parsing default function arguments, for which 528 /// we would like to provide diagnostics (e.g., passing non-POD arguments 529 /// through varargs) but do not want to mark declarations as "referenced" 530 /// until the default argument is used. 531 PotentiallyEvaluatedIfUsed 532 }; 533 534 /// \brief Data structure used to record current or nested 535 /// expression evaluation contexts. 536 struct ExpressionEvaluationContextRecord { 537 /// \brief The expression evaluation context. 538 ExpressionEvaluationContext Context; 539 540 /// \brief Whether the enclosing context needed a cleanup. 541 bool ParentNeedsCleanups; 542 543 /// \brief The number of temporaries that were active when we 544 /// entered this expression evaluation context. 545 unsigned NumTemporaries; 546 547 /// \brief The set of declarations referenced within a 548 /// potentially potentially-evaluated context. 549 /// 550 /// When leaving a potentially potentially-evaluated context, each 551 /// of these elements will be as referenced if the corresponding 552 /// potentially potentially evaluated expression is potentially 553 /// evaluated. 554 PotentiallyReferencedDecls *PotentiallyReferenced; 555 556 /// \brief The set of diagnostics to emit should this potentially 557 /// potentially-evaluated context become evaluated. 558 PotentiallyEmittedDiagnostics *PotentiallyDiagnosed; 559 560 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 561 unsigned NumTemporaries, 562 bool ParentNeedsCleanups) 563 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups), 564 NumTemporaries(NumTemporaries), 565 PotentiallyReferenced(0), PotentiallyDiagnosed(0) { } 566 567 void addReferencedDecl(SourceLocation Loc, Decl *Decl) { 568 if (!PotentiallyReferenced) 569 PotentiallyReferenced = new PotentiallyReferencedDecls; 570 PotentiallyReferenced->push_back(std::make_pair(Loc, Decl)); 571 } 572 573 void addDiagnostic(SourceLocation Loc, const PartialDiagnostic &PD) { 574 if (!PotentiallyDiagnosed) 575 PotentiallyDiagnosed = new PotentiallyEmittedDiagnostics; 576 PotentiallyDiagnosed->push_back(std::make_pair(Loc, PD)); 577 } 578 579 void Destroy() { 580 delete PotentiallyReferenced; 581 delete PotentiallyDiagnosed; 582 PotentiallyReferenced = 0; 583 PotentiallyDiagnosed = 0; 584 } 585 }; 586 587 /// A stack of expression evaluation contexts. 588 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 589 590 /// SpecialMemberOverloadResult - The overloading result for a special member 591 /// function. 592 /// 593 /// This is basically a wrapper around PointerIntPair. The lowest bit of the 594 /// integer is used to determine whether we have a parameter qualification 595 /// match, the second-lowest is whether we had success in resolving the 596 /// overload to a unique non-deleted function. 597 /// 598 /// The ConstParamMatch bit represents whether, when looking up a copy 599 /// constructor or assignment operator, we found a potential copy 600 /// constructor/assignment operator whose first parameter is const-qualified. 601 /// This is used for determining parameter types of other objects and is 602 /// utterly meaningless on other types of special members. 603 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 604 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 605 public: 606 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 607 : FastFoldingSetNode(ID) 608 {} 609 610 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 611 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 612 613 bool hasSuccess() const { return Pair.getInt() & 0x1; } 614 void setSuccess(bool B) { 615 Pair.setInt(unsigned(B) | hasConstParamMatch() << 1); 616 } 617 618 bool hasConstParamMatch() const { return Pair.getInt() & 0x2; } 619 void setConstParamMatch(bool B) { 620 Pair.setInt(B << 1 | unsigned(hasSuccess())); 621 } 622 }; 623 624 /// \brief A cache of special member function overload resolution results 625 /// for C++ records. 626 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 627 628 /// \brief Whether the code handled by Sema should be considered a 629 /// complete translation unit or not. 630 /// 631 /// When true (which is generally the case), Sema will perform 632 /// end-of-translation-unit semantic tasks (such as creating 633 /// initializers for tentative definitions in C) once parsing has 634 /// completed. This flag will be false when building PCH files, 635 /// since a PCH file is by definition not a complete translation 636 /// unit. 637 bool CompleteTranslationUnit; 638 639 llvm::BumpPtrAllocator BumpAlloc; 640 641 /// \brief The number of SFINAE diagnostics that have been trapped. 642 unsigned NumSFINAEErrors; 643 644 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> > 645 UnparsedDefaultArgInstantiationsMap; 646 647 /// \brief A mapping from parameters with unparsed default arguments to the 648 /// set of instantiations of each parameter. 649 /// 650 /// This mapping is a temporary data structure used when parsing 651 /// nested class templates or nested classes of class templates, 652 /// where we might end up instantiating an inner class before the 653 /// default arguments of its methods have been parsed. 654 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 655 656 // Contains the locations of the beginning of unparsed default 657 // argument locations. 658 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 659 660 /// UndefinedInternals - all the used, undefined objects with 661 /// internal linkage in this translation unit. 662 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 663 664 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 665 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 666 667 /// Method Pool - allows efficient lookup when typechecking messages to "id". 668 /// We need to maintain a list, since selectors can have differing signatures 669 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 670 /// of selectors are "overloaded"). 671 GlobalMethodPool MethodPool; 672 673 /// Method selectors used in a @selector expression. Used for implementation 674 /// of -Wselector. 675 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 676 677 GlobalMethodPool::iterator ReadMethodPool(Selector Sel); 678 679 /// Private Helper predicate to check for 'self'. 680 bool isSelfExpr(Expr *RExpr); 681public: 682 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 683 bool CompleteTranslationUnit = true, 684 CodeCompleteConsumer *CompletionConsumer = 0); 685 ~Sema(); 686 687 /// \brief Perform initialization that occurs after the parser has been 688 /// initialized but before it parses anything. 689 void Initialize(); 690 691 const LangOptions &getLangOptions() const { return LangOpts; } 692 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 693 FPOptions &getFPOptions() { return FPFeatures; } 694 695 Diagnostic &getDiagnostics() const { return Diags; } 696 SourceManager &getSourceManager() const { return SourceMgr; } 697 const TargetAttributesSema &getTargetAttributesSema() const; 698 Preprocessor &getPreprocessor() const { return PP; } 699 ASTContext &getASTContext() const { return Context; } 700 ASTConsumer &getASTConsumer() const { return Consumer; } 701 ASTMutationListener *getASTMutationListener() const; 702 703 void PrintStats() const; 704 705 /// \brief Helper class that creates diagnostics with optional 706 /// template instantiation stacks. 707 /// 708 /// This class provides a wrapper around the basic DiagnosticBuilder 709 /// class that emits diagnostics. SemaDiagnosticBuilder is 710 /// responsible for emitting the diagnostic (as DiagnosticBuilder 711 /// does) and, if the diagnostic comes from inside a template 712 /// instantiation, printing the template instantiation stack as 713 /// well. 714 class SemaDiagnosticBuilder : public DiagnosticBuilder { 715 Sema &SemaRef; 716 unsigned DiagID; 717 718 public: 719 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 720 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 721 722 explicit SemaDiagnosticBuilder(Sema &SemaRef) 723 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 724 725 ~SemaDiagnosticBuilder(); 726 }; 727 728 /// \brief Emit a diagnostic. 729 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 730 731 /// \brief Emit a partial diagnostic. 732 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 733 734 /// \brief Build a partial diagnostic. 735 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 736 737 bool findMacroSpelling(SourceLocation &loc, StringRef name); 738 739 ExprResult Owned(Expr* E) { return E; } 740 ExprResult Owned(ExprResult R) { return R; } 741 StmtResult Owned(Stmt* S) { return S; } 742 743 void ActOnEndOfTranslationUnit(); 744 745 void CheckDelegatingCtorCycles(); 746 747 Scope *getScopeForContext(DeclContext *Ctx); 748 749 void PushFunctionScope(); 750 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 751 void PopFunctionOrBlockScope(const sema::AnalysisBasedWarnings::Policy *WP =0, 752 const Decl *D = 0, const BlockExpr *blkExpr = 0); 753 754 sema::FunctionScopeInfo *getCurFunction() const { 755 return FunctionScopes.back(); 756 } 757 758 bool hasAnyUnrecoverableErrorsInThisFunction() const; 759 760 /// \brief Retrieve the current block, if any. 761 sema::BlockScopeInfo *getCurBlock(); 762 763 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 764 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 765 766 //===--------------------------------------------------------------------===// 767 // Type Analysis / Processing: SemaType.cpp. 768 // 769 770 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 771 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 772 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 773 } 774 QualType BuildPointerType(QualType T, 775 SourceLocation Loc, DeclarationName Entity); 776 QualType BuildReferenceType(QualType T, bool LValueRef, 777 SourceLocation Loc, DeclarationName Entity); 778 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 779 Expr *ArraySize, unsigned Quals, 780 SourceRange Brackets, DeclarationName Entity); 781 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 782 SourceLocation AttrLoc); 783 QualType BuildFunctionType(QualType T, 784 QualType *ParamTypes, unsigned NumParamTypes, 785 bool Variadic, unsigned Quals, 786 RefQualifierKind RefQualifier, 787 SourceLocation Loc, DeclarationName Entity, 788 FunctionType::ExtInfo Info); 789 QualType BuildMemberPointerType(QualType T, QualType Class, 790 SourceLocation Loc, 791 DeclarationName Entity); 792 QualType BuildBlockPointerType(QualType T, 793 SourceLocation Loc, DeclarationName Entity); 794 QualType BuildParenType(QualType T); 795 796 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); 797 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); 798 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 799 TypeSourceInfo *ReturnTypeInfo); 800 /// \brief Package the given type and TSI into a ParsedType. 801 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 802 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 803 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 804 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 805 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 806 bool CheckDistantExceptionSpec(QualType T); 807 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 808 bool CheckEquivalentExceptionSpec( 809 const FunctionProtoType *Old, SourceLocation OldLoc, 810 const FunctionProtoType *New, SourceLocation NewLoc); 811 bool CheckEquivalentExceptionSpec( 812 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 813 const FunctionProtoType *Old, SourceLocation OldLoc, 814 const FunctionProtoType *New, SourceLocation NewLoc, 815 bool *MissingExceptionSpecification = 0, 816 bool *MissingEmptyExceptionSpecification = 0, 817 bool AllowNoexceptAllMatchWithNoSpec = false, 818 bool IsOperatorNew = false); 819 bool CheckExceptionSpecSubset( 820 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 821 const FunctionProtoType *Superset, SourceLocation SuperLoc, 822 const FunctionProtoType *Subset, SourceLocation SubLoc); 823 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 824 const FunctionProtoType *Target, SourceLocation TargetLoc, 825 const FunctionProtoType *Source, SourceLocation SourceLoc); 826 827 TypeResult ActOnTypeName(Scope *S, Declarator &D); 828 829 bool RequireCompleteType(SourceLocation Loc, QualType T, 830 const PartialDiagnostic &PD, 831 std::pair<SourceLocation, PartialDiagnostic> Note); 832 bool RequireCompleteType(SourceLocation Loc, QualType T, 833 const PartialDiagnostic &PD); 834 bool RequireCompleteType(SourceLocation Loc, QualType T, 835 unsigned DiagID); 836 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 837 std::pair<SourceLocation, 838 PartialDiagnostic> Note); 839 840 841 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 842 const CXXScopeSpec &SS, QualType T); 843 844 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 845 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 846 QualType BuildUnaryTransformType(QualType BaseType, 847 UnaryTransformType::UTTKind UKind, 848 SourceLocation Loc); 849 850 //===--------------------------------------------------------------------===// 851 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 852 // 853 854 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 855 856 void DiagnoseUseOfUnimplementedSelectors(); 857 858 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 859 Scope *S, CXXScopeSpec *SS = 0, 860 bool isClassName = false, 861 bool HasTrailingDot = false, 862 ParsedType ObjectType = ParsedType(), 863 bool WantNontrivialTypeSourceInfo = false); 864 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 865 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS); 866 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 867 SourceLocation IILoc, 868 Scope *S, 869 CXXScopeSpec *SS, 870 ParsedType &SuggestedType); 871 872 /// \brief Describes the result of the name lookup and resolution performed 873 /// by \c ClassifyName(). 874 enum NameClassificationKind { 875 NC_Unknown, 876 NC_Error, 877 NC_Keyword, 878 NC_Type, 879 NC_Expression, 880 NC_NestedNameSpecifier, 881 NC_TypeTemplate, 882 NC_FunctionTemplate 883 }; 884 885 class NameClassification { 886 NameClassificationKind Kind; 887 ExprResult Expr; 888 TemplateName Template; 889 ParsedType Type; 890 const IdentifierInfo *Keyword; 891 892 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 893 894 public: 895 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 896 897 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 898 899 NameClassification(const IdentifierInfo *Keyword) 900 : Kind(NC_Keyword), Keyword(Keyword) { } 901 902 static NameClassification Error() { 903 return NameClassification(NC_Error); 904 } 905 906 static NameClassification Unknown() { 907 return NameClassification(NC_Unknown); 908 } 909 910 static NameClassification NestedNameSpecifier() { 911 return NameClassification(NC_NestedNameSpecifier); 912 } 913 914 static NameClassification TypeTemplate(TemplateName Name) { 915 NameClassification Result(NC_TypeTemplate); 916 Result.Template = Name; 917 return Result; 918 } 919 920 static NameClassification FunctionTemplate(TemplateName Name) { 921 NameClassification Result(NC_FunctionTemplate); 922 Result.Template = Name; 923 return Result; 924 } 925 926 NameClassificationKind getKind() const { return Kind; } 927 928 ParsedType getType() const { 929 assert(Kind == NC_Type); 930 return Type; 931 } 932 933 ExprResult getExpression() const { 934 assert(Kind == NC_Expression); 935 return Expr; 936 } 937 938 TemplateName getTemplateName() const { 939 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 940 return Template; 941 } 942 943 TemplateNameKind getTemplateNameKind() const { 944 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 945 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 946 } 947}; 948 949 /// \brief Perform name lookup on the given name, classifying it based on 950 /// the results of name lookup and the following token. 951 /// 952 /// This routine is used by the parser to resolve identifiers and help direct 953 /// parsing. When the identifier cannot be found, this routine will attempt 954 /// to correct the typo and classify based on the resulting name. 955 /// 956 /// \param S The scope in which we're performing name lookup. 957 /// 958 /// \param SS The nested-name-specifier that precedes the name. 959 /// 960 /// \param Name The identifier. If typo correction finds an alternative name, 961 /// this pointer parameter will be updated accordingly. 962 /// 963 /// \param NameLoc The location of the identifier. 964 /// 965 /// \param NextToken The token following the identifier. Used to help 966 /// disambiguate the name. 967 NameClassification ClassifyName(Scope *S, 968 CXXScopeSpec &SS, 969 IdentifierInfo *&Name, 970 SourceLocation NameLoc, 971 const Token &NextToken); 972 973 Decl *ActOnDeclarator(Scope *S, Declarator &D); 974 975 Decl *HandleDeclarator(Scope *S, Declarator &D, 976 MultiTemplateParamsArg TemplateParameterLists, 977 bool IsFunctionDefinition); 978 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 979 const LookupResult &Previous, 980 Scope *S); 981 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 982 void DiagnoseFunctionSpecifiers(Declarator& D); 983 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 984 void CheckShadow(Scope *S, VarDecl *D); 985 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 986 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 987 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 988 QualType R, TypeSourceInfo *TInfo, 989 LookupResult &Previous, bool &Redeclaration); 990 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 991 LookupResult &Previous, bool &Redeclaration); 992 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 993 QualType R, TypeSourceInfo *TInfo, 994 LookupResult &Previous, 995 MultiTemplateParamsArg TemplateParamLists, 996 bool &Redeclaration); 997 void CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous, 998 bool &Redeclaration); 999 void CheckCompleteVariableDeclaration(VarDecl *var); 1000 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1001 QualType R, TypeSourceInfo *TInfo, 1002 LookupResult &Previous, 1003 MultiTemplateParamsArg TemplateParamLists, 1004 bool IsFunctionDefinition, 1005 bool &Redeclaration, 1006 bool &AddToScope); 1007 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1008 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1009 void CheckFunctionDeclaration(Scope *S, 1010 FunctionDecl *NewFD, LookupResult &Previous, 1011 bool IsExplicitSpecialization, 1012 bool &Redeclaration); 1013 void CheckMain(FunctionDecl *FD); 1014 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1015 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1016 SourceLocation Loc, 1017 QualType T); 1018 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1019 SourceLocation NameLoc, IdentifierInfo *Name, 1020 QualType T, TypeSourceInfo *TSInfo, 1021 StorageClass SC, StorageClass SCAsWritten); 1022 void ActOnParamDefaultArgument(Decl *param, 1023 SourceLocation EqualLoc, 1024 Expr *defarg); 1025 void ActOnParamUnparsedDefaultArgument(Decl *param, 1026 SourceLocation EqualLoc, 1027 SourceLocation ArgLoc); 1028 void ActOnParamDefaultArgumentError(Decl *param); 1029 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1030 SourceLocation EqualLoc); 1031 1032 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1033 bool TypeMayContainAuto); 1034 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1035 void ActOnInitializerError(Decl *Dcl); 1036 void ActOnCXXForRangeDecl(Decl *D); 1037 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1038 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1039 void FinalizeDeclaration(Decl *D); 1040 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1041 Decl **Group, 1042 unsigned NumDecls); 1043 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1044 bool TypeMayContainAuto = true); 1045 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1046 SourceLocation LocAfterDecls); 1047 void CheckForFunctionRedefinition(FunctionDecl *FD); 1048 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1049 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1050 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1051 1052 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1053 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1054 1055 /// \brief Diagnose any unused parameters in the given sequence of 1056 /// ParmVarDecl pointers. 1057 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1058 ParmVarDecl * const *End); 1059 1060 /// \brief Diagnose whether the size of parameters or return value of a 1061 /// function or obj-c method definition is pass-by-value and larger than a 1062 /// specified threshold. 1063 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1064 ParmVarDecl * const *End, 1065 QualType ReturnTy, 1066 NamedDecl *D); 1067 1068 void DiagnoseInvalidJumps(Stmt *Body); 1069 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1070 SourceLocation AsmLoc, 1071 SourceLocation RParenLoc); 1072 1073 /// Scope actions. 1074 void ActOnPopScope(SourceLocation Loc, Scope *S); 1075 void ActOnTranslationUnitScope(Scope *S); 1076 1077 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1078 DeclSpec &DS); 1079 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1080 DeclSpec &DS, 1081 MultiTemplateParamsArg TemplateParams); 1082 1083 StmtResult ActOnVlaStmt(const DeclSpec &DS); 1084 1085 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1086 AccessSpecifier AS, 1087 RecordDecl *Record); 1088 1089 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1090 RecordDecl *Record); 1091 1092 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1093 TagTypeKind NewTag, bool isDefinition, 1094 SourceLocation NewTagLoc, 1095 const IdentifierInfo &Name); 1096 1097 enum TagUseKind { 1098 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1099 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1100 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1101 TUK_Friend // Friend declaration: 'friend struct foo;' 1102 }; 1103 1104 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1105 SourceLocation KWLoc, CXXScopeSpec &SS, 1106 IdentifierInfo *Name, SourceLocation NameLoc, 1107 AttributeList *Attr, AccessSpecifier AS, 1108 MultiTemplateParamsArg TemplateParameterLists, 1109 bool &OwnedDecl, bool &IsDependent, bool ScopedEnum, 1110 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1111 1112 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1113 unsigned TagSpec, SourceLocation TagLoc, 1114 CXXScopeSpec &SS, 1115 IdentifierInfo *Name, SourceLocation NameLoc, 1116 AttributeList *Attr, 1117 MultiTemplateParamsArg TempParamLists); 1118 1119 TypeResult ActOnDependentTag(Scope *S, 1120 unsigned TagSpec, 1121 TagUseKind TUK, 1122 const CXXScopeSpec &SS, 1123 IdentifierInfo *Name, 1124 SourceLocation TagLoc, 1125 SourceLocation NameLoc); 1126 1127 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1128 IdentifierInfo *ClassName, 1129 SmallVectorImpl<Decl *> &Decls); 1130 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1131 Declarator &D, Expr *BitfieldWidth); 1132 1133 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1134 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1135 AccessSpecifier AS); 1136 1137 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1138 TypeSourceInfo *TInfo, 1139 RecordDecl *Record, SourceLocation Loc, 1140 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1141 SourceLocation TSSL, 1142 AccessSpecifier AS, NamedDecl *PrevDecl, 1143 Declarator *D = 0); 1144 1145 enum CXXSpecialMember { 1146 CXXDefaultConstructor, 1147 CXXCopyConstructor, 1148 CXXMoveConstructor, 1149 CXXCopyAssignment, 1150 CXXMoveAssignment, 1151 CXXDestructor, 1152 CXXInvalid 1153 }; 1154 bool CheckNontrivialField(FieldDecl *FD); 1155 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1156 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1157 void ActOnLastBitfield(SourceLocation DeclStart, Decl *IntfDecl, 1158 SmallVectorImpl<Decl *> &AllIvarDecls); 1159 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, Decl *IntfDecl, 1160 Declarator &D, Expr *BitfieldWidth, 1161 tok::ObjCKeywordKind visibility); 1162 1163 // This is used for both record definitions and ObjC interface declarations. 1164 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1165 Decl **Fields, unsigned NumFields, 1166 SourceLocation LBrac, SourceLocation RBrac, 1167 AttributeList *AttrList); 1168 1169 /// ActOnTagStartDefinition - Invoked when we have entered the 1170 /// scope of a tag's definition (e.g., for an enumeration, class, 1171 /// struct, or union). 1172 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1173 1174 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1175 /// C++ record definition's base-specifiers clause and are starting its 1176 /// member declarations. 1177 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1178 SourceLocation FinalLoc, 1179 SourceLocation LBraceLoc); 1180 1181 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1182 /// the definition of a tag (enumeration, class, struct, or union). 1183 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1184 SourceLocation RBraceLoc); 1185 1186 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1187 /// error parsing the definition of a tag. 1188 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1189 1190 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1191 EnumConstantDecl *LastEnumConst, 1192 SourceLocation IdLoc, 1193 IdentifierInfo *Id, 1194 Expr *val); 1195 1196 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1197 SourceLocation IdLoc, IdentifierInfo *Id, 1198 AttributeList *Attrs, 1199 SourceLocation EqualLoc, Expr *Val); 1200 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1201 SourceLocation RBraceLoc, Decl *EnumDecl, 1202 Decl **Elements, unsigned NumElements, 1203 Scope *S, AttributeList *Attr); 1204 1205 DeclContext *getContainingDC(DeclContext *DC); 1206 1207 /// Set the current declaration context until it gets popped. 1208 void PushDeclContext(Scope *S, DeclContext *DC); 1209 void PopDeclContext(); 1210 1211 /// EnterDeclaratorContext - Used when we must lookup names in the context 1212 /// of a declarator's nested name specifier. 1213 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1214 void ExitDeclaratorContext(Scope *S); 1215 1216 DeclContext *getFunctionLevelDeclContext(); 1217 1218 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1219 /// to the function decl for the function being parsed. If we're currently 1220 /// in a 'block', this returns the containing context. 1221 FunctionDecl *getCurFunctionDecl(); 1222 1223 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1224 /// the method decl for the method being parsed. If we're currently 1225 /// in a 'block', this returns the containing context. 1226 ObjCMethodDecl *getCurMethodDecl(); 1227 1228 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1229 /// or C function we're in, otherwise return null. If we're currently 1230 /// in a 'block', this returns the containing context. 1231 NamedDecl *getCurFunctionOrMethodDecl(); 1232 1233 /// Add this decl to the scope shadowed decl chains. 1234 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1235 1236 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1237 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1238 /// true if 'D' belongs to the given declaration context. 1239 /// 1240 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1241 /// whether the declaration is in scope for the purposes of explicit template 1242 /// instantiation or specialization. The default is false. 1243 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1244 bool ExplicitInstantiationOrSpecialization = false); 1245 1246 /// Finds the scope corresponding to the given decl context, if it 1247 /// happens to be an enclosing scope. Otherwise return NULL. 1248 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1249 1250 /// Subroutines of ActOnDeclarator(). 1251 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1252 TypeSourceInfo *TInfo); 1253 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1254 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1255 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1256 void mergeObjCMethodDecls(ObjCMethodDecl *New, const ObjCMethodDecl *Old); 1257 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1258 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1259 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1260 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1261 1262 // AssignmentAction - This is used by all the assignment diagnostic functions 1263 // to represent what is actually causing the operation 1264 enum AssignmentAction { 1265 AA_Assigning, 1266 AA_Passing, 1267 AA_Returning, 1268 AA_Converting, 1269 AA_Initializing, 1270 AA_Sending, 1271 AA_Casting 1272 }; 1273 1274 /// C++ Overloading. 1275 enum OverloadKind { 1276 /// This is a legitimate overload: the existing declarations are 1277 /// functions or function templates with different signatures. 1278 Ovl_Overload, 1279 1280 /// This is not an overload because the signature exactly matches 1281 /// an existing declaration. 1282 Ovl_Match, 1283 1284 /// This is not an overload because the lookup results contain a 1285 /// non-function. 1286 Ovl_NonFunction 1287 }; 1288 OverloadKind CheckOverload(Scope *S, 1289 FunctionDecl *New, 1290 const LookupResult &OldDecls, 1291 NamedDecl *&OldDecl, 1292 bool IsForUsingDecl); 1293 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1294 1295 /// \brief Checks availability of the function depending on the current 1296 /// function context.Inside an unavailable function,unavailability is ignored. 1297 /// 1298 /// \returns true if \arg FD is unavailable and current context is inside 1299 /// an available function, false otherwise. 1300 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1301 1302 ImplicitConversionSequence 1303 TryImplicitConversion(Expr *From, QualType ToType, 1304 bool SuppressUserConversions, 1305 bool AllowExplicit, 1306 bool InOverloadResolution, 1307 bool CStyle, 1308 bool AllowObjCWritebackConversion); 1309 1310 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1311 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1312 bool IsComplexPromotion(QualType FromType, QualType ToType); 1313 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1314 bool InOverloadResolution, 1315 QualType& ConvertedType, bool &IncompatibleObjC); 1316 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1317 QualType& ConvertedType, bool &IncompatibleObjC); 1318 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1319 QualType &ConvertedType); 1320 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1321 QualType& ConvertedType); 1322 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1323 const FunctionProtoType *NewType); 1324 1325 bool CheckPointerConversion(Expr *From, QualType ToType, 1326 CastKind &Kind, 1327 CXXCastPath& BasePath, 1328 bool IgnoreBaseAccess); 1329 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1330 bool InOverloadResolution, 1331 QualType &ConvertedType); 1332 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1333 CastKind &Kind, 1334 CXXCastPath &BasePath, 1335 bool IgnoreBaseAccess); 1336 bool IsQualificationConversion(QualType FromType, QualType ToType, 1337 bool CStyle, bool &ObjCLifetimeConversion); 1338 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1339 QualType &ResultTy); 1340 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1341 1342 1343 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1344 const VarDecl *NRVOCandidate, 1345 QualType ResultType, 1346 Expr *Value, 1347 bool AllowNRVO = true); 1348 1349 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1350 ExprResult Init); 1351 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1352 SourceLocation EqualLoc, 1353 ExprResult Init, 1354 bool TopLevelOfInitList = false); 1355 ExprResult PerformObjectArgumentInitialization(Expr *From, 1356 NestedNameSpecifier *Qualifier, 1357 NamedDecl *FoundDecl, 1358 CXXMethodDecl *Method); 1359 1360 ExprResult PerformContextuallyConvertToBool(Expr *From); 1361 ExprResult PerformContextuallyConvertToObjCId(Expr *From); 1362 1363 ExprResult 1364 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1365 const PartialDiagnostic &NotIntDiag, 1366 const PartialDiagnostic &IncompleteDiag, 1367 const PartialDiagnostic &ExplicitConvDiag, 1368 const PartialDiagnostic &ExplicitConvNote, 1369 const PartialDiagnostic &AmbigDiag, 1370 const PartialDiagnostic &AmbigNote, 1371 const PartialDiagnostic &ConvDiag); 1372 1373 ExprResult PerformObjectMemberConversion(Expr *From, 1374 NestedNameSpecifier *Qualifier, 1375 NamedDecl *FoundDecl, 1376 NamedDecl *Member); 1377 1378 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1379 // TODO: make this is a typesafe union. 1380 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1381 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1382 1383 void AddOverloadCandidate(NamedDecl *Function, 1384 DeclAccessPair FoundDecl, 1385 Expr **Args, unsigned NumArgs, 1386 OverloadCandidateSet &CandidateSet); 1387 1388 void AddOverloadCandidate(FunctionDecl *Function, 1389 DeclAccessPair FoundDecl, 1390 Expr **Args, unsigned NumArgs, 1391 OverloadCandidateSet& CandidateSet, 1392 bool SuppressUserConversions = false, 1393 bool PartialOverloading = false); 1394 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1395 Expr **Args, unsigned NumArgs, 1396 OverloadCandidateSet& CandidateSet, 1397 bool SuppressUserConversions = false); 1398 void AddMethodCandidate(DeclAccessPair FoundDecl, 1399 QualType ObjectType, 1400 Expr::Classification ObjectClassification, 1401 Expr **Args, unsigned NumArgs, 1402 OverloadCandidateSet& CandidateSet, 1403 bool SuppressUserConversion = false); 1404 void AddMethodCandidate(CXXMethodDecl *Method, 1405 DeclAccessPair FoundDecl, 1406 CXXRecordDecl *ActingContext, QualType ObjectType, 1407 Expr::Classification ObjectClassification, 1408 Expr **Args, unsigned NumArgs, 1409 OverloadCandidateSet& CandidateSet, 1410 bool SuppressUserConversions = false); 1411 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1412 DeclAccessPair FoundDecl, 1413 CXXRecordDecl *ActingContext, 1414 TemplateArgumentListInfo *ExplicitTemplateArgs, 1415 QualType ObjectType, 1416 Expr::Classification ObjectClassification, 1417 Expr **Args, unsigned NumArgs, 1418 OverloadCandidateSet& CandidateSet, 1419 bool SuppressUserConversions = false); 1420 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1421 DeclAccessPair FoundDecl, 1422 TemplateArgumentListInfo *ExplicitTemplateArgs, 1423 Expr **Args, unsigned NumArgs, 1424 OverloadCandidateSet& CandidateSet, 1425 bool SuppressUserConversions = false); 1426 void AddConversionCandidate(CXXConversionDecl *Conversion, 1427 DeclAccessPair FoundDecl, 1428 CXXRecordDecl *ActingContext, 1429 Expr *From, QualType ToType, 1430 OverloadCandidateSet& CandidateSet); 1431 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1432 DeclAccessPair FoundDecl, 1433 CXXRecordDecl *ActingContext, 1434 Expr *From, QualType ToType, 1435 OverloadCandidateSet &CandidateSet); 1436 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1437 DeclAccessPair FoundDecl, 1438 CXXRecordDecl *ActingContext, 1439 const FunctionProtoType *Proto, 1440 Expr *Object, Expr **Args, unsigned NumArgs, 1441 OverloadCandidateSet& CandidateSet); 1442 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1443 SourceLocation OpLoc, 1444 Expr **Args, unsigned NumArgs, 1445 OverloadCandidateSet& CandidateSet, 1446 SourceRange OpRange = SourceRange()); 1447 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1448 Expr **Args, unsigned NumArgs, 1449 OverloadCandidateSet& CandidateSet, 1450 bool IsAssignmentOperator = false, 1451 unsigned NumContextualBoolArguments = 0); 1452 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1453 SourceLocation OpLoc, 1454 Expr **Args, unsigned NumArgs, 1455 OverloadCandidateSet& CandidateSet); 1456 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1457 bool Operator, 1458 Expr **Args, unsigned NumArgs, 1459 TemplateArgumentListInfo *ExplicitTemplateArgs, 1460 OverloadCandidateSet& CandidateSet, 1461 bool PartialOverloading = false, 1462 bool StdNamespaceIsAssociated = false); 1463 1464 // Emit as a 'note' the specific overload candidate 1465 void NoteOverloadCandidate(FunctionDecl *Fn); 1466 1467 // Emit as a series of 'note's all template and non-templates 1468 // identified by the expression Expr 1469 void NoteAllOverloadCandidates(Expr* E); 1470 1471 // [PossiblyAFunctionType] --> [Return] 1472 // NonFunctionType --> NonFunctionType 1473 // R (A) --> R(A) 1474 // R (*)(A) --> R (A) 1475 // R (&)(A) --> R (A) 1476 // R (S::*)(A) --> R (A) 1477 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1478 1479 FunctionDecl *ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, QualType TargetType, 1480 bool Complain, 1481 DeclAccessPair &Found); 1482 1483 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1484 bool Complain = false, 1485 DeclAccessPair* Found = 0); 1486 1487 ExprResult ResolveAndFixSingleFunctionTemplateSpecialization( 1488 Expr *SrcExpr, bool DoFunctionPointerConverion = false, 1489 bool Complain = false, 1490 const SourceRange& OpRangeForComplaining = SourceRange(), 1491 QualType DestTypeForComplaining = QualType(), 1492 unsigned DiagIDForComplaining = 0); 1493 1494 1495 Expr *FixOverloadedFunctionReference(Expr *E, 1496 DeclAccessPair FoundDecl, 1497 FunctionDecl *Fn); 1498 ExprResult FixOverloadedFunctionReference(ExprResult, 1499 DeclAccessPair FoundDecl, 1500 FunctionDecl *Fn); 1501 1502 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1503 Expr **Args, unsigned NumArgs, 1504 OverloadCandidateSet &CandidateSet, 1505 bool PartialOverloading = false); 1506 1507 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1508 UnresolvedLookupExpr *ULE, 1509 SourceLocation LParenLoc, 1510 Expr **Args, unsigned NumArgs, 1511 SourceLocation RParenLoc, 1512 Expr *ExecConfig); 1513 1514 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1515 unsigned Opc, 1516 const UnresolvedSetImpl &Fns, 1517 Expr *input); 1518 1519 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1520 unsigned Opc, 1521 const UnresolvedSetImpl &Fns, 1522 Expr *LHS, Expr *RHS); 1523 1524 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1525 SourceLocation RLoc, 1526 Expr *Base,Expr *Idx); 1527 1528 ExprResult 1529 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1530 SourceLocation LParenLoc, Expr **Args, 1531 unsigned NumArgs, SourceLocation RParenLoc); 1532 ExprResult 1533 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1534 Expr **Args, unsigned NumArgs, 1535 SourceLocation RParenLoc); 1536 1537 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1538 SourceLocation OpLoc); 1539 1540 /// CheckCallReturnType - Checks that a call expression's return type is 1541 /// complete. Returns true on failure. The location passed in is the location 1542 /// that best represents the call. 1543 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1544 CallExpr *CE, FunctionDecl *FD); 1545 1546 /// Helpers for dealing with blocks and functions. 1547 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1548 bool CheckParameterNames); 1549 void CheckCXXDefaultArguments(FunctionDecl *FD); 1550 void CheckExtraCXXDefaultArguments(Declarator &D); 1551 Scope *getNonFieldDeclScope(Scope *S); 1552 1553 /// \name Name lookup 1554 /// 1555 /// These routines provide name lookup that is used during semantic 1556 /// analysis to resolve the various kinds of names (identifiers, 1557 /// overloaded operator names, constructor names, etc.) into zero or 1558 /// more declarations within a particular scope. The major entry 1559 /// points are LookupName, which performs unqualified name lookup, 1560 /// and LookupQualifiedName, which performs qualified name lookup. 1561 /// 1562 /// All name lookup is performed based on some specific criteria, 1563 /// which specify what names will be visible to name lookup and how 1564 /// far name lookup should work. These criteria are important both 1565 /// for capturing language semantics (certain lookups will ignore 1566 /// certain names, for example) and for performance, since name 1567 /// lookup is often a bottleneck in the compilation of C++. Name 1568 /// lookup criteria is specified via the LookupCriteria enumeration. 1569 /// 1570 /// The results of name lookup can vary based on the kind of name 1571 /// lookup performed, the current language, and the translation 1572 /// unit. In C, for example, name lookup will either return nothing 1573 /// (no entity found) or a single declaration. In C++, name lookup 1574 /// can additionally refer to a set of overloaded functions or 1575 /// result in an ambiguity. All of the possible results of name 1576 /// lookup are captured by the LookupResult class, which provides 1577 /// the ability to distinguish among them. 1578 //@{ 1579 1580 /// @brief Describes the kind of name lookup to perform. 1581 enum LookupNameKind { 1582 /// Ordinary name lookup, which finds ordinary names (functions, 1583 /// variables, typedefs, etc.) in C and most kinds of names 1584 /// (functions, variables, members, types, etc.) in C++. 1585 LookupOrdinaryName = 0, 1586 /// Tag name lookup, which finds the names of enums, classes, 1587 /// structs, and unions. 1588 LookupTagName, 1589 /// Label name lookup. 1590 LookupLabel, 1591 /// Member name lookup, which finds the names of 1592 /// class/struct/union members. 1593 LookupMemberName, 1594 /// Look up of an operator name (e.g., operator+) for use with 1595 /// operator overloading. This lookup is similar to ordinary name 1596 /// lookup, but will ignore any declarations that are class members. 1597 LookupOperatorName, 1598 /// Look up of a name that precedes the '::' scope resolution 1599 /// operator in C++. This lookup completely ignores operator, object, 1600 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1601 LookupNestedNameSpecifierName, 1602 /// Look up a namespace name within a C++ using directive or 1603 /// namespace alias definition, ignoring non-namespace names (C++ 1604 /// [basic.lookup.udir]p1). 1605 LookupNamespaceName, 1606 /// Look up all declarations in a scope with the given name, 1607 /// including resolved using declarations. This is appropriate 1608 /// for checking redeclarations for a using declaration. 1609 LookupUsingDeclName, 1610 /// Look up an ordinary name that is going to be redeclared as a 1611 /// name with linkage. This lookup ignores any declarations that 1612 /// are outside of the current scope unless they have linkage. See 1613 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1614 LookupRedeclarationWithLinkage, 1615 /// Look up the name of an Objective-C protocol. 1616 LookupObjCProtocolName, 1617 /// Look up implicit 'self' parameter of an objective-c method. 1618 LookupObjCImplicitSelfParam, 1619 /// \brief Look up any declaration with any name. 1620 LookupAnyName 1621 }; 1622 1623 /// \brief Specifies whether (or how) name lookup is being performed for a 1624 /// redeclaration (vs. a reference). 1625 enum RedeclarationKind { 1626 /// \brief The lookup is a reference to this name that is not for the 1627 /// purpose of redeclaring the name. 1628 NotForRedeclaration = 0, 1629 /// \brief The lookup results will be used for redeclaration of a name, 1630 /// if an entity by that name already exists. 1631 ForRedeclaration 1632 }; 1633 1634private: 1635 bool CppLookupName(LookupResult &R, Scope *S); 1636 1637 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1638 CXXSpecialMember SM, 1639 bool ConstArg, 1640 bool VolatileArg, 1641 bool RValueThis, 1642 bool ConstThis, 1643 bool VolatileThis); 1644 1645 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1646 // 1647 // The boolean value will be true to indicate that the namespace was loaded 1648 // from an AST/PCH file, or false otherwise. 1649 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1650 1651 /// \brief Whether we have already loaded known namespaces from an extenal 1652 /// source. 1653 bool LoadedExternalKnownNamespaces; 1654 1655public: 1656 /// \brief Look up a name, looking for a single declaration. Return 1657 /// null if the results were absent, ambiguous, or overloaded. 1658 /// 1659 /// It is preferable to use the elaborated form and explicitly handle 1660 /// ambiguity and overloaded. 1661 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1662 SourceLocation Loc, 1663 LookupNameKind NameKind, 1664 RedeclarationKind Redecl 1665 = NotForRedeclaration); 1666 bool LookupName(LookupResult &R, Scope *S, 1667 bool AllowBuiltinCreation = false); 1668 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1669 bool InUnqualifiedLookup = false); 1670 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1671 bool AllowBuiltinCreation = false, 1672 bool EnteringContext = false); 1673 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1674 1675 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1676 QualType T1, QualType T2, 1677 UnresolvedSetImpl &Functions); 1678 1679 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1680 SourceLocation GnuLabelLoc = SourceLocation()); 1681 1682 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1683 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1684 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1685 unsigned Quals, 1686 bool *ConstParam = 0); 1687 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1688 bool RValueThis, unsigned ThisQuals, 1689 bool *ConstParam = 0); 1690 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1691 1692 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1693 Expr **Args, unsigned NumArgs, 1694 ADLResult &Functions, 1695 bool StdNamespaceIsAssociated = false); 1696 1697 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1698 VisibleDeclConsumer &Consumer, 1699 bool IncludeGlobalScope = true); 1700 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1701 VisibleDeclConsumer &Consumer, 1702 bool IncludeGlobalScope = true); 1703 1704 /// \brief The context in which typo-correction occurs. 1705 /// 1706 /// The typo-correction context affects which keywords (if any) are 1707 /// considered when trying to correct for typos. 1708 enum CorrectTypoContext { 1709 /// \brief An unknown context, where any keyword might be valid. 1710 CTC_Unknown, 1711 /// \brief A context where no keywords are used (e.g. we expect an actual 1712 /// name). 1713 CTC_NoKeywords, 1714 /// \brief A context where we're correcting a type name. 1715 CTC_Type, 1716 /// \brief An expression context. 1717 CTC_Expression, 1718 /// \brief A type cast, or anything else that can be followed by a '<'. 1719 CTC_CXXCasts, 1720 /// \brief A member lookup context. 1721 CTC_MemberLookup, 1722 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1723 CTC_ObjCIvarLookup, 1724 /// \brief An Objective-C property lookup context (e.g., self.prop). 1725 CTC_ObjCPropertyLookup, 1726 /// \brief The receiver of an Objective-C message send within an 1727 /// Objective-C method where 'super' is a valid keyword. 1728 CTC_ObjCMessageReceiver 1729 }; 1730 1731 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1732 Sema::LookupNameKind LookupKind, 1733 Scope *S, CXXScopeSpec *SS, 1734 DeclContext *MemberContext = NULL, 1735 bool EnteringContext = false, 1736 CorrectTypoContext CTC = CTC_Unknown, 1737 const ObjCObjectPointerType *OPT = NULL); 1738 1739 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1740 AssociatedNamespaceSet &AssociatedNamespaces, 1741 AssociatedClassSet &AssociatedClasses); 1742 1743 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1744 bool ConsiderLinkage, 1745 bool ExplicitInstantiationOrSpecialization); 1746 1747 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1748 //@} 1749 1750 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1751 SourceLocation IdLoc, 1752 bool TypoCorrection = false); 1753 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1754 Scope *S, bool ForRedeclaration, 1755 SourceLocation Loc); 1756 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1757 Scope *S); 1758 void AddKnownFunctionAttributes(FunctionDecl *FD); 1759 1760 // More parsing and symbol table subroutines. 1761 1762 // Decl attributes - this routine is the top level dispatcher. 1763 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1764 bool NonInheritable = true, bool Inheritable = true); 1765 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1766 bool NonInheritable = true, bool Inheritable = true); 1767 1768 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1769 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1770 bool CheckNoReturnAttr(const AttributeList &attr); 1771 1772 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1773 bool &IncompleteImpl, unsigned DiagID); 1774 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 1775 ObjCMethodDecl *MethodDecl, 1776 bool IsProtocolMethodDecl, 1777 bool IsDeclaration = false); 1778 1779 /// WarnExactTypedMethods - This routine issues a warning if method 1780 /// implementation declaration matches exactly that of its declaration. 1781 void WarnExactTypedMethods(ObjCMethodDecl *Method, 1782 ObjCMethodDecl *MethodDecl, 1783 bool IsProtocolMethodDecl); 1784 1785 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1786 ObjCInterfaceDecl *IDecl); 1787 1788 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1789 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap; 1790 1791 /// CheckProtocolMethodDefs - This routine checks unimplemented 1792 /// methods declared in protocol, and those referenced by it. 1793 /// \param IDecl - Used for checking for methods which may have been 1794 /// inherited. 1795 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1796 ObjCProtocolDecl *PDecl, 1797 bool& IncompleteImpl, 1798 const SelectorSet &InsMap, 1799 const SelectorSet &ClsMap, 1800 ObjCContainerDecl *CDecl); 1801 1802 /// CheckImplementationIvars - This routine checks if the instance variables 1803 /// listed in the implelementation match those listed in the interface. 1804 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1805 ObjCIvarDecl **Fields, unsigned nIvars, 1806 SourceLocation Loc); 1807 1808 /// \brief Determine whether we can synthesize a provisional ivar for the 1809 /// given name. 1810 ObjCPropertyDecl *canSynthesizeProvisionalIvar(IdentifierInfo *II); 1811 1812 /// \brief Determine whether we can synthesize a provisional ivar for the 1813 /// given property. 1814 bool canSynthesizeProvisionalIvar(ObjCPropertyDecl *Property); 1815 1816 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1817 /// remains unimplemented in the class or category @implementation. 1818 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1819 ObjCContainerDecl* IDecl, 1820 bool IncompleteImpl = false); 1821 1822 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1823 /// which must be implemented by this implementation. 1824 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1825 ObjCContainerDecl *CDecl, 1826 const SelectorSet &InsMap); 1827 1828 /// DefaultSynthesizeProperties - This routine default synthesizes all 1829 /// properties which must be synthesized in class's @implementation. 1830 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1831 ObjCInterfaceDecl *IDecl); 1832 1833 /// CollectImmediateProperties - This routine collects all properties in 1834 /// the class and its conforming protocols; but not those it its super class. 1835 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1836 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1837 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1838 1839 1840 /// LookupPropertyDecl - Looks up a property in the current class and all 1841 /// its protocols. 1842 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1843 IdentifierInfo *II); 1844 1845 /// Called by ActOnProperty to handle @property declarations in 1846 //// class extensions. 1847 Decl *HandlePropertyInClassExtension(Scope *S, 1848 ObjCCategoryDecl *CDecl, 1849 SourceLocation AtLoc, 1850 FieldDeclarator &FD, 1851 Selector GetterSel, 1852 Selector SetterSel, 1853 const bool isAssign, 1854 const bool isReadWrite, 1855 const unsigned Attributes, 1856 bool *isOverridingProperty, 1857 TypeSourceInfo *T, 1858 tok::ObjCKeywordKind MethodImplKind); 1859 1860 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1861 /// handle creating the ObjcPropertyDecl for a category or @interface. 1862 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1863 ObjCContainerDecl *CDecl, 1864 SourceLocation AtLoc, 1865 FieldDeclarator &FD, 1866 Selector GetterSel, 1867 Selector SetterSel, 1868 const bool isAssign, 1869 const bool isReadWrite, 1870 const unsigned Attributes, 1871 TypeSourceInfo *T, 1872 tok::ObjCKeywordKind MethodImplKind, 1873 DeclContext *lexicalDC = 0); 1874 1875 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1876 /// warning) when atomic property has one but not the other user-declared 1877 /// setter or getter. 1878 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1879 ObjCContainerDecl* IDecl); 1880 1881 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 1882 1883 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1884 1885 enum MethodMatchStrategy { 1886 MMS_loose, 1887 MMS_strict 1888 }; 1889 1890 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1891 /// true, or false, accordingly. 1892 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1893 const ObjCMethodDecl *PrevMethod, 1894 MethodMatchStrategy strategy = MMS_strict); 1895 1896 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1897 /// or protocol against those declared in their implementations. 1898 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1899 const SelectorSet &ClsMap, 1900 SelectorSet &InsMapSeen, 1901 SelectorSet &ClsMapSeen, 1902 ObjCImplDecl* IMPDecl, 1903 ObjCContainerDecl* IDecl, 1904 bool &IncompleteImpl, 1905 bool ImmediateClass, 1906 bool WarnExactMatch=false); 1907 1908 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in 1909 /// category matches with those implemented in its primary class and 1910 /// warns each time an exact match is found. 1911 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP); 1912 1913private: 1914 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1915 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1916 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1917 1918 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1919 /// optionally warns if there are multiple signatures. 1920 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1921 bool receiverIdOrClass, 1922 bool warn, bool instance); 1923 1924public: 1925 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1926 /// unit are added to a global pool. This allows us to efficiently associate 1927 /// a selector with a method declaraation for purposes of typechecking 1928 /// messages sent to "id" (where the class of the object is unknown). 1929 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1930 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1931 } 1932 1933 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1934 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1935 AddMethodToGlobalPool(Method, impl, /*instance*/false); 1936 } 1937 1938 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 1939 /// there are multiple signatures. 1940 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 1941 bool receiverIdOrClass=false, 1942 bool warn=true) { 1943 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1944 warn, /*instance*/true); 1945 } 1946 1947 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 1948 /// there are multiple signatures. 1949 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 1950 bool receiverIdOrClass=false, 1951 bool warn=true) { 1952 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1953 warn, /*instance*/false); 1954 } 1955 1956 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 1957 /// implementation. 1958 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 1959 1960 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 1961 /// initialization. 1962 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 1963 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 1964 1965 //===--------------------------------------------------------------------===// 1966 // Statement Parsing Callbacks: SemaStmt.cpp. 1967public: 1968 class FullExprArg { 1969 public: 1970 FullExprArg(Sema &actions) : E(0) { } 1971 1972 // FIXME: The const_cast here is ugly. RValue references would make this 1973 // much nicer (or we could duplicate a bunch of the move semantics 1974 // emulation code from Ownership.h). 1975 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 1976 1977 ExprResult release() { 1978 return move(E); 1979 } 1980 1981 Expr *get() const { return E; } 1982 1983 Expr *operator->() { 1984 return E; 1985 } 1986 1987 private: 1988 // FIXME: No need to make the entire Sema class a friend when it's just 1989 // Sema::MakeFullExpr that needs access to the constructor below. 1990 friend class Sema; 1991 1992 explicit FullExprArg(Expr *expr) : E(expr) {} 1993 1994 Expr *E; 1995 }; 1996 1997 FullExprArg MakeFullExpr(Expr *Arg) { 1998 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 1999 } 2000 2001 StmtResult ActOnExprStmt(FullExprArg Expr); 2002 2003 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 2004 SourceLocation LeadingEmptyMacroLoc = SourceLocation()); 2005 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 2006 MultiStmtArg Elts, 2007 bool isStmtExpr); 2008 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2009 SourceLocation StartLoc, 2010 SourceLocation EndLoc); 2011 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2012 StmtResult ActOnForEachLValueExpr(Expr *E); 2013 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2014 SourceLocation DotDotDotLoc, Expr *RHSVal, 2015 SourceLocation ColonLoc); 2016 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2017 2018 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2019 SourceLocation ColonLoc, 2020 Stmt *SubStmt, Scope *CurScope); 2021 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2022 SourceLocation ColonLoc, Stmt *SubStmt); 2023 2024 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2025 FullExprArg CondVal, Decl *CondVar, 2026 Stmt *ThenVal, 2027 SourceLocation ElseLoc, Stmt *ElseVal); 2028 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2029 Expr *Cond, 2030 Decl *CondVar); 2031 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2032 Stmt *Switch, Stmt *Body); 2033 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2034 FullExprArg Cond, 2035 Decl *CondVar, Stmt *Body); 2036 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2037 SourceLocation WhileLoc, 2038 SourceLocation CondLParen, Expr *Cond, 2039 SourceLocation CondRParen); 2040 2041 StmtResult ActOnForStmt(SourceLocation ForLoc, 2042 SourceLocation LParenLoc, 2043 Stmt *First, FullExprArg Second, 2044 Decl *SecondVar, 2045 FullExprArg Third, 2046 SourceLocation RParenLoc, 2047 Stmt *Body); 2048 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc, 2049 Expr *collection); 2050 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2051 SourceLocation LParenLoc, 2052 Stmt *First, Expr *Second, 2053 SourceLocation RParenLoc, Stmt *Body); 2054 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2055 SourceLocation LParenLoc, Stmt *LoopVar, 2056 SourceLocation ColonLoc, Expr *Collection, 2057 SourceLocation RParenLoc); 2058 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2059 SourceLocation ColonLoc, 2060 Stmt *RangeDecl, Stmt *BeginEndDecl, 2061 Expr *Cond, Expr *Inc, 2062 Stmt *LoopVarDecl, 2063 SourceLocation RParenLoc); 2064 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2065 2066 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2067 SourceLocation LabelLoc, 2068 LabelDecl *TheDecl); 2069 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2070 SourceLocation StarLoc, 2071 Expr *DestExp); 2072 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2073 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2074 2075 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2076 bool AllowFunctionParameters); 2077 2078 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2079 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2080 2081 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2082 bool IsSimple, bool IsVolatile, 2083 unsigned NumOutputs, unsigned NumInputs, 2084 IdentifierInfo **Names, 2085 MultiExprArg Constraints, 2086 MultiExprArg Exprs, 2087 Expr *AsmString, 2088 MultiExprArg Clobbers, 2089 SourceLocation RParenLoc, 2090 bool MSAsm = false); 2091 2092 2093 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2094 SourceLocation StartLoc, 2095 SourceLocation IdLoc, IdentifierInfo *Id, 2096 bool Invalid = false); 2097 2098 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2099 2100 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2101 Decl *Parm, Stmt *Body); 2102 2103 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2104 2105 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2106 MultiStmtArg Catch, Stmt *Finally); 2107 2108 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2109 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2110 Scope *CurScope); 2111 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, 2112 Expr *operand); 2113 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2114 Expr *SynchExpr, 2115 Stmt *SynchBody); 2116 2117 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2118 2119 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2120 SourceLocation StartLoc, 2121 SourceLocation IdLoc, 2122 IdentifierInfo *Id); 2123 2124 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2125 2126 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2127 Decl *ExDecl, Stmt *HandlerBlock); 2128 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2129 MultiStmtArg Handlers); 2130 2131 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2132 SourceLocation TryLoc, 2133 Stmt *TryBlock, 2134 Stmt *Handler); 2135 2136 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2137 Expr *FilterExpr, 2138 Stmt *Block); 2139 2140 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2141 Stmt *Block); 2142 2143 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2144 2145 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2146 2147 /// \brief If it's a file scoped decl that must warn if not used, keep track 2148 /// of it. 2149 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2150 2151 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2152 /// whose result is unused, warn. 2153 void DiagnoseUnusedExprResult(const Stmt *S); 2154 void DiagnoseUnusedDecl(const NamedDecl *ND); 2155 2156 ParsingDeclState PushParsingDeclaration() { 2157 return DelayedDiagnostics.pushParsingDecl(); 2158 } 2159 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2160 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2161 } 2162 2163 typedef ProcessingContextState ParsingClassState; 2164 ParsingClassState PushParsingClass() { 2165 return DelayedDiagnostics.pushContext(); 2166 } 2167 void PopParsingClass(ParsingClassState state) { 2168 DelayedDiagnostics.popContext(state); 2169 } 2170 2171 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2172 SourceLocation Loc, 2173 const ObjCInterfaceDecl *UnknownObjCClass=0); 2174 2175 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2176 2177 bool makeUnavailableInSystemHeader(SourceLocation loc, 2178 StringRef message); 2179 2180 //===--------------------------------------------------------------------===// 2181 // Expression Parsing Callbacks: SemaExpr.cpp. 2182 2183 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2184 const ObjCInterfaceDecl *UnknownObjCClass=0); 2185 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2186 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2187 ObjCMethodDecl *Getter, 2188 SourceLocation Loc); 2189 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2190 Expr **Args, unsigned NumArgs); 2191 2192 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 2193 2194 void PopExpressionEvaluationContext(); 2195 2196 void DiscardCleanupsInEvaluationContext(); 2197 2198 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 2199 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2200 void MarkDeclarationsReferencedInExpr(Expr *E); 2201 2202 /// \brief Figure out if an expression could be turned into a call. 2203 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2204 UnresolvedSetImpl &NonTemplateOverloads); 2205 /// \brief Give notes for a set of overloads. 2206 void NoteOverloads(const UnresolvedSetImpl &Overloads, 2207 const SourceLocation FinalNoteLoc); 2208 2209 /// \brief Conditionally issue a diagnostic based on the current 2210 /// evaluation context. 2211 /// 2212 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2213 /// the function body is parsed, and then do a basic reachability analysis to 2214 /// determine if the statement is reachable. If it is unreachable, the 2215 /// diagnostic will not be emitted. 2216 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *stmt, 2217 const PartialDiagnostic &PD); 2218 2219 // Primary Expressions. 2220 SourceRange getExprRange(Expr *E) const; 2221 2222 ObjCIvarDecl *SynthesizeProvisionalIvar(LookupResult &Lookup, 2223 IdentifierInfo *II, 2224 SourceLocation NameLoc); 2225 2226 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Name, 2227 bool HasTrailingLParen, bool IsAddressOfOperand); 2228 2229 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2230 TemplateArgumentListInfo &Buffer, 2231 DeclarationNameInfo &NameInfo, 2232 const TemplateArgumentListInfo *&TemplateArgs); 2233 2234 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2235 CorrectTypoContext CTC = CTC_Unknown, 2236 TemplateArgumentListInfo *ExplicitTemplateArgs = 0, 2237 Expr **Args = 0, unsigned NumArgs = 0); 2238 2239 ExprResult LookupInObjCMethod(LookupResult &R, Scope *S, IdentifierInfo *II, 2240 bool AllowBuiltinCreation=false); 2241 2242 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2243 const DeclarationNameInfo &NameInfo, 2244 bool isAddressOfOperand, 2245 const TemplateArgumentListInfo *TemplateArgs); 2246 2247 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2248 ExprValueKind VK, 2249 SourceLocation Loc, 2250 const CXXScopeSpec *SS = 0); 2251 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2252 ExprValueKind VK, 2253 const DeclarationNameInfo &NameInfo, 2254 const CXXScopeSpec *SS = 0); 2255 ExprResult 2256 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2257 SourceLocation nameLoc, 2258 IndirectFieldDecl *indirectField, 2259 Expr *baseObjectExpr = 0, 2260 SourceLocation opLoc = SourceLocation()); 2261 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2262 LookupResult &R, 2263 const TemplateArgumentListInfo *TemplateArgs); 2264 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2265 LookupResult &R, 2266 const TemplateArgumentListInfo *TemplateArgs, 2267 bool IsDefiniteInstance); 2268 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2269 const LookupResult &R, 2270 bool HasTrailingLParen); 2271 2272 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2273 const DeclarationNameInfo &NameInfo); 2274 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2275 const DeclarationNameInfo &NameInfo, 2276 const TemplateArgumentListInfo *TemplateArgs); 2277 2278 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2279 LookupResult &R, 2280 bool ADL); 2281 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2282 const DeclarationNameInfo &NameInfo, 2283 NamedDecl *D); 2284 2285 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2286 ExprResult ActOnNumericConstant(const Token &); 2287 ExprResult ActOnCharacterConstant(const Token &); 2288 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *Val); 2289 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2290 SourceLocation R, 2291 MultiExprArg Val); 2292 2293 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2294 /// fragments (e.g. "foo" "bar" L"baz"). 2295 ExprResult ActOnStringLiteral(const Token *Toks, unsigned NumToks); 2296 2297 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2298 SourceLocation DefaultLoc, 2299 SourceLocation RParenLoc, 2300 Expr *ControllingExpr, 2301 MultiTypeArg Types, 2302 MultiExprArg Exprs); 2303 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2304 SourceLocation DefaultLoc, 2305 SourceLocation RParenLoc, 2306 Expr *ControllingExpr, 2307 TypeSourceInfo **Types, 2308 Expr **Exprs, 2309 unsigned NumAssocs); 2310 2311 // Binary/Unary Operators. 'Tok' is the token for the operator. 2312 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2313 Expr *InputArg); 2314 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2315 UnaryOperatorKind Opc, Expr *input); 2316 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2317 tok::TokenKind Op, Expr *Input); 2318 2319 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *T, 2320 SourceLocation OpLoc, 2321 UnaryExprOrTypeTrait ExprKind, 2322 SourceRange R); 2323 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2324 UnaryExprOrTypeTrait ExprKind); 2325 ExprResult 2326 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2327 UnaryExprOrTypeTrait ExprKind, 2328 bool isType, void *TyOrEx, 2329 const SourceRange &ArgRange); 2330 2331 ExprResult CheckPlaceholderExpr(Expr *E); 2332 bool CheckVecStepExpr(Expr *E); 2333 2334 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2335 bool CheckUnaryExprOrTypeTraitOperand(QualType type, SourceLocation OpLoc, 2336 SourceRange R, 2337 UnaryExprOrTypeTrait ExprKind); 2338 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2339 SourceLocation OpLoc, 2340 IdentifierInfo &Name, 2341 SourceLocation NameLoc, 2342 SourceLocation RParenLoc); 2343 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2344 tok::TokenKind Kind, Expr *Input); 2345 2346 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2347 Expr *Idx, SourceLocation RLoc); 2348 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2349 Expr *Idx, SourceLocation RLoc); 2350 2351 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2352 SourceLocation OpLoc, bool IsArrow, 2353 CXXScopeSpec &SS, 2354 NamedDecl *FirstQualifierInScope, 2355 const DeclarationNameInfo &NameInfo, 2356 const TemplateArgumentListInfo *TemplateArgs); 2357 2358 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2359 SourceLocation OpLoc, bool IsArrow, 2360 const CXXScopeSpec &SS, 2361 NamedDecl *FirstQualifierInScope, 2362 LookupResult &R, 2363 const TemplateArgumentListInfo *TemplateArgs, 2364 bool SuppressQualifierCheck = false); 2365 2366 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2367 bool &IsArrow, SourceLocation OpLoc, 2368 CXXScopeSpec &SS, 2369 Decl *ObjCImpDecl, 2370 bool HasTemplateArgs); 2371 2372 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2373 const CXXScopeSpec &SS, 2374 const LookupResult &R); 2375 2376 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2377 bool IsArrow, SourceLocation OpLoc, 2378 const CXXScopeSpec &SS, 2379 NamedDecl *FirstQualifierInScope, 2380 const DeclarationNameInfo &NameInfo, 2381 const TemplateArgumentListInfo *TemplateArgs); 2382 2383 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2384 SourceLocation OpLoc, 2385 tok::TokenKind OpKind, 2386 CXXScopeSpec &SS, 2387 UnqualifiedId &Member, 2388 Decl *ObjCImpDecl, 2389 bool HasTrailingLParen); 2390 2391 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2392 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2393 FunctionDecl *FDecl, 2394 const FunctionProtoType *Proto, 2395 Expr **Args, unsigned NumArgs, 2396 SourceLocation RParenLoc); 2397 2398 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2399 /// This provides the location of the left/right parens and a list of comma 2400 /// locations. 2401 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2402 MultiExprArg Args, SourceLocation RParenLoc, 2403 Expr *ExecConfig = 0); 2404 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2405 SourceLocation LParenLoc, 2406 Expr **Args, unsigned NumArgs, 2407 SourceLocation RParenLoc, 2408 Expr *ExecConfig = 0); 2409 2410 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2411 MultiExprArg ExecConfig, SourceLocation GGGLoc); 2412 2413 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2414 Declarator &D, ParsedType &Ty, 2415 SourceLocation RParenLoc, Expr *Op); 2416 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2417 TypeSourceInfo *Ty, 2418 SourceLocation RParenLoc, 2419 Expr *Op); 2420 2421 /// \brief Build an altivec or OpenCL literal. 2422 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2423 SourceLocation RParenLoc, Expr *E, 2424 TypeSourceInfo *TInfo); 2425 2426 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2427 2428 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2429 ParsedType Ty, 2430 SourceLocation RParenLoc, 2431 Expr *Op); 2432 2433 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2434 TypeSourceInfo *TInfo, 2435 SourceLocation RParenLoc, 2436 Expr *InitExpr); 2437 2438 ExprResult ActOnInitList(SourceLocation LParenLoc, 2439 MultiExprArg InitList, 2440 SourceLocation RParenLoc); 2441 2442 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2443 SourceLocation Loc, 2444 bool GNUSyntax, 2445 ExprResult Init); 2446 2447 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2448 tok::TokenKind Kind, Expr *LHS, Expr *RHS); 2449 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2450 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2451 ExprResult CreateBuiltinBinOp(SourceLocation TokLoc, 2452 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2453 2454 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2455 /// in the case of a the GNU conditional expr extension. 2456 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2457 SourceLocation ColonLoc, 2458 Expr *Cond, Expr *LHS, Expr *RHS); 2459 2460 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2461 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2462 LabelDecl *LD); 2463 2464 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2465 SourceLocation RPLoc); // "({..})" 2466 2467 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2468 struct OffsetOfComponent { 2469 SourceLocation LocStart, LocEnd; 2470 bool isBrackets; // true if [expr], false if .ident 2471 union { 2472 IdentifierInfo *IdentInfo; 2473 ExprTy *E; 2474 } U; 2475 }; 2476 2477 /// __builtin_offsetof(type, a.b[123][456].c) 2478 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2479 TypeSourceInfo *TInfo, 2480 OffsetOfComponent *CompPtr, 2481 unsigned NumComponents, 2482 SourceLocation RParenLoc); 2483 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2484 SourceLocation BuiltinLoc, 2485 SourceLocation TypeLoc, 2486 ParsedType Arg1, 2487 OffsetOfComponent *CompPtr, 2488 unsigned NumComponents, 2489 SourceLocation RParenLoc); 2490 2491 // __builtin_choose_expr(constExpr, expr1, expr2) 2492 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2493 Expr *cond, Expr *expr1, 2494 Expr *expr2, SourceLocation RPLoc); 2495 2496 // __builtin_va_arg(expr, type) 2497 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, 2498 Expr *expr, ParsedType type, 2499 SourceLocation RPLoc); 2500 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, 2501 Expr *expr, TypeSourceInfo *TInfo, 2502 SourceLocation RPLoc); 2503 2504 // __null 2505 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2506 2507 bool CheckCaseExpression(Expr *expr); 2508 2509 bool CheckMicrosoftIfExistsSymbol(CXXScopeSpec &SS, UnqualifiedId &Name); 2510 2511 //===------------------------- "Block" Extension ------------------------===// 2512 2513 /// ActOnBlockStart - This callback is invoked when a block literal is 2514 /// started. 2515 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2516 2517 /// ActOnBlockArguments - This callback allows processing of block arguments. 2518 /// If there are no arguments, this is still invoked. 2519 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2520 2521 /// ActOnBlockError - If there is an error parsing a block, this callback 2522 /// is invoked to pop the information about the block from the action impl. 2523 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2524 2525 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2526 /// literal was successfully completed. ^(int x){...} 2527 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, 2528 Stmt *Body, Scope *CurScope); 2529 2530 //===---------------------------- OpenCL Features -----------------------===// 2531 2532 /// __builtin_astype(...) 2533 ExprResult ActOnAsTypeExpr(Expr *expr, ParsedType DestTy, 2534 SourceLocation BuiltinLoc, 2535 SourceLocation RParenLoc); 2536 2537 //===---------------------------- C++ Features --------------------------===// 2538 2539 // Act on C++ namespaces 2540 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2541 SourceLocation NamespaceLoc, 2542 SourceLocation IdentLoc, 2543 IdentifierInfo *Ident, 2544 SourceLocation LBrace, 2545 AttributeList *AttrList); 2546 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2547 2548 NamespaceDecl *getStdNamespace() const; 2549 NamespaceDecl *getOrCreateStdNamespace(); 2550 2551 CXXRecordDecl *getStdBadAlloc() const; 2552 2553 Decl *ActOnUsingDirective(Scope *CurScope, 2554 SourceLocation UsingLoc, 2555 SourceLocation NamespcLoc, 2556 CXXScopeSpec &SS, 2557 SourceLocation IdentLoc, 2558 IdentifierInfo *NamespcName, 2559 AttributeList *AttrList); 2560 2561 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2562 2563 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2564 SourceLocation NamespaceLoc, 2565 SourceLocation AliasLoc, 2566 IdentifierInfo *Alias, 2567 CXXScopeSpec &SS, 2568 SourceLocation IdentLoc, 2569 IdentifierInfo *Ident); 2570 2571 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2572 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2573 const LookupResult &PreviousDecls); 2574 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2575 NamedDecl *Target); 2576 2577 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2578 bool isTypeName, 2579 const CXXScopeSpec &SS, 2580 SourceLocation NameLoc, 2581 const LookupResult &Previous); 2582 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2583 const CXXScopeSpec &SS, 2584 SourceLocation NameLoc); 2585 2586 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2587 SourceLocation UsingLoc, 2588 CXXScopeSpec &SS, 2589 const DeclarationNameInfo &NameInfo, 2590 AttributeList *AttrList, 2591 bool IsInstantiation, 2592 bool IsTypeName, 2593 SourceLocation TypenameLoc); 2594 2595 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2596 2597 Decl *ActOnUsingDeclaration(Scope *CurScope, 2598 AccessSpecifier AS, 2599 bool HasUsingKeyword, 2600 SourceLocation UsingLoc, 2601 CXXScopeSpec &SS, 2602 UnqualifiedId &Name, 2603 AttributeList *AttrList, 2604 bool IsTypeName, 2605 SourceLocation TypenameLoc); 2606 Decl *ActOnAliasDeclaration(Scope *CurScope, 2607 AccessSpecifier AS, 2608 MultiTemplateParamsArg TemplateParams, 2609 SourceLocation UsingLoc, 2610 UnqualifiedId &Name, 2611 TypeResult Type); 2612 2613 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2614 /// ActOnDeclarator, when a C++ direct initializer is present. 2615 /// e.g: "int x(1);" 2616 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2617 SourceLocation LParenLoc, 2618 MultiExprArg Exprs, 2619 SourceLocation RParenLoc, 2620 bool TypeMayContainAuto); 2621 2622 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2623 /// and sets it as the initializer for the the passed in VarDecl. 2624 bool InitializeVarWithConstructor(VarDecl *VD, 2625 CXXConstructorDecl *Constructor, 2626 MultiExprArg Exprs); 2627 2628 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2629 /// including handling of its default argument expressions. 2630 /// 2631 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2632 ExprResult 2633 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2634 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2635 bool RequiresZeroInit, unsigned ConstructKind, 2636 SourceRange ParenRange); 2637 2638 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2639 // the constructor can be elidable? 2640 ExprResult 2641 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2642 CXXConstructorDecl *Constructor, bool Elidable, 2643 MultiExprArg Exprs, bool RequiresZeroInit, 2644 unsigned ConstructKind, 2645 SourceRange ParenRange); 2646 2647 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2648 /// the default expr if needed. 2649 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2650 FunctionDecl *FD, 2651 ParmVarDecl *Param); 2652 2653 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2654 /// constructed variable. 2655 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2656 2657 /// \brief Helper class that collects exception specifications for 2658 /// implicitly-declared special member functions. 2659 class ImplicitExceptionSpecification { 2660 // Pointer to allow copying 2661 ASTContext *Context; 2662 // We order exception specifications thus: 2663 // noexcept is the most restrictive, but is only used in C++0x. 2664 // throw() comes next. 2665 // Then a throw(collected exceptions) 2666 // Finally no specification. 2667 // throw(...) is used instead if any called function uses it. 2668 // 2669 // If this exception specification cannot be known yet (for instance, 2670 // because this is the exception specification for a defaulted default 2671 // constructor and we haven't finished parsing the deferred parts of the 2672 // class yet), the C++0x standard does not specify how to behave. We 2673 // record this as an 'unknown' exception specification, which overrules 2674 // any other specification (even 'none', to keep this rule simple). 2675 ExceptionSpecificationType ComputedEST; 2676 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2677 SmallVector<QualType, 4> Exceptions; 2678 2679 void ClearExceptions() { 2680 ExceptionsSeen.clear(); 2681 Exceptions.clear(); 2682 } 2683 2684 public: 2685 explicit ImplicitExceptionSpecification(ASTContext &Context) 2686 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2687 if (!Context.getLangOptions().CPlusPlus0x) 2688 ComputedEST = EST_DynamicNone; 2689 } 2690 2691 /// \brief Get the computed exception specification type. 2692 ExceptionSpecificationType getExceptionSpecType() const { 2693 assert(ComputedEST != EST_ComputedNoexcept && 2694 "noexcept(expr) should not be a possible result"); 2695 return ComputedEST; 2696 } 2697 2698 /// \brief The number of exceptions in the exception specification. 2699 unsigned size() const { return Exceptions.size(); } 2700 2701 /// \brief The set of exceptions in the exception specification. 2702 const QualType *data() const { return Exceptions.data(); } 2703 2704 /// \brief Integrate another called method into the collected data. 2705 void CalledDecl(CXXMethodDecl *Method); 2706 2707 /// \brief Integrate an invoked expression into the collected data. 2708 void CalledExpr(Expr *E); 2709 2710 /// \brief Specify that the exception specification can't be detemined yet. 2711 void SetDelayed() { 2712 ClearExceptions(); 2713 ComputedEST = EST_Delayed; 2714 } 2715 2716 FunctionProtoType::ExtProtoInfo getEPI() const { 2717 FunctionProtoType::ExtProtoInfo EPI; 2718 EPI.ExceptionSpecType = getExceptionSpecType(); 2719 EPI.NumExceptions = size(); 2720 EPI.Exceptions = data(); 2721 return EPI; 2722 } 2723 }; 2724 2725 /// \brief Determine what sort of exception specification a defaulted 2726 /// copy constructor of a class will have. 2727 ImplicitExceptionSpecification 2728 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2729 2730 /// \brief Determine what sort of exception specification a defaulted 2731 /// default constructor of a class will have, and whether the parameter 2732 /// will be const. 2733 std::pair<ImplicitExceptionSpecification, bool> 2734 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2735 2736 /// \brief Determine what sort of exception specification a defautled 2737 /// copy assignment operator of a class will have, and whether the 2738 /// parameter will be const. 2739 std::pair<ImplicitExceptionSpecification, bool> 2740 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2741 2742 /// \brief Determine what sort of exception specification a defaulted 2743 /// destructor of a class will have. 2744 ImplicitExceptionSpecification 2745 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 2746 2747 /// \brief Determine if a defaulted default constructor ought to be 2748 /// deleted. 2749 bool ShouldDeleteDefaultConstructor(CXXConstructorDecl *CD); 2750 2751 /// \brief Determine if a defaulted copy constructor ought to be 2752 /// deleted. 2753 bool ShouldDeleteCopyConstructor(CXXConstructorDecl *CD); 2754 2755 /// \brief Determine if a defaulted copy assignment operator ought to be 2756 /// deleted. 2757 bool ShouldDeleteCopyAssignmentOperator(CXXMethodDecl *MD); 2758 2759 /// \brief Determine if a defaulted destructor ought to be deleted. 2760 bool ShouldDeleteDestructor(CXXDestructorDecl *DD); 2761 2762 /// \brief Declare the implicit default constructor for the given class. 2763 /// 2764 /// \param ClassDecl The class declaration into which the implicit 2765 /// default constructor will be added. 2766 /// 2767 /// \returns The implicitly-declared default constructor. 2768 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2769 CXXRecordDecl *ClassDecl); 2770 2771 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2772 /// defining this constructor as the default constructor. 2773 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2774 CXXConstructorDecl *Constructor); 2775 2776 /// \brief Declare the implicit destructor for the given class. 2777 /// 2778 /// \param ClassDecl The class declaration into which the implicit 2779 /// destructor will be added. 2780 /// 2781 /// \returns The implicitly-declared destructor. 2782 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2783 2784 /// DefineImplicitDestructor - Checks for feasibility of 2785 /// defining this destructor as the default destructor. 2786 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2787 CXXDestructorDecl *Destructor); 2788 2789 /// \brief Build an exception spec for destructors that don't have one. 2790 /// 2791 /// C++11 says that user-defined destructors with no exception spec get one 2792 /// that looks as if the destructor was implicitly declared. 2793 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 2794 CXXDestructorDecl *Destructor); 2795 2796 /// \brief Declare all inherited constructors for the given class. 2797 /// 2798 /// \param ClassDecl The class declaration into which the inherited 2799 /// constructors will be added. 2800 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2801 2802 /// \brief Declare the implicit copy constructor for the given class. 2803 /// 2804 /// \param S The scope of the class, which may be NULL if this is a 2805 /// template instantiation. 2806 /// 2807 /// \param ClassDecl The class declaration into which the implicit 2808 /// copy constructor will be added. 2809 /// 2810 /// \returns The implicitly-declared copy constructor. 2811 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2812 2813 /// DefineImplicitCopyConstructor - Checks for feasibility of 2814 /// defining this constructor as the copy constructor. 2815 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2816 CXXConstructorDecl *Constructor); 2817 2818 /// \brief Declare the implicit copy assignment operator for the given class. 2819 /// 2820 /// \param S The scope of the class, which may be NULL if this is a 2821 /// template instantiation. 2822 /// 2823 /// \param ClassDecl The class declaration into which the implicit 2824 /// copy-assignment operator will be added. 2825 /// 2826 /// \returns The implicitly-declared copy assignment operator. 2827 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2828 2829 /// \brief Defined an implicitly-declared copy assignment operator. 2830 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2831 CXXMethodDecl *MethodDecl); 2832 2833 /// \brief Force the declaration of any implicitly-declared members of this 2834 /// class. 2835 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2836 2837 /// MaybeBindToTemporary - If the passed in expression has a record type with 2838 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 2839 /// it simply returns the passed in expression. 2840 ExprResult MaybeBindToTemporary(Expr *E); 2841 2842 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 2843 MultiExprArg ArgsPtr, 2844 SourceLocation Loc, 2845 ASTOwningVector<Expr*> &ConvertedArgs); 2846 2847 ParsedType getDestructorName(SourceLocation TildeLoc, 2848 IdentifierInfo &II, SourceLocation NameLoc, 2849 Scope *S, CXXScopeSpec &SS, 2850 ParsedType ObjectType, 2851 bool EnteringContext); 2852 2853 // Checks that reinterpret casts don't have undefined behavior. 2854 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 2855 bool IsDereference, SourceRange Range); 2856 2857 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 2858 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 2859 tok::TokenKind Kind, 2860 SourceLocation LAngleBracketLoc, 2861 Declarator &D, 2862 SourceLocation RAngleBracketLoc, 2863 SourceLocation LParenLoc, 2864 Expr *E, 2865 SourceLocation RParenLoc); 2866 2867 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 2868 tok::TokenKind Kind, 2869 TypeSourceInfo *Ty, 2870 Expr *E, 2871 SourceRange AngleBrackets, 2872 SourceRange Parens); 2873 2874 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2875 SourceLocation TypeidLoc, 2876 TypeSourceInfo *Operand, 2877 SourceLocation RParenLoc); 2878 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2879 SourceLocation TypeidLoc, 2880 Expr *Operand, 2881 SourceLocation RParenLoc); 2882 2883 /// ActOnCXXTypeid - Parse typeid( something ). 2884 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 2885 SourceLocation LParenLoc, bool isType, 2886 void *TyOrExpr, 2887 SourceLocation RParenLoc); 2888 2889 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2890 SourceLocation TypeidLoc, 2891 TypeSourceInfo *Operand, 2892 SourceLocation RParenLoc); 2893 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2894 SourceLocation TypeidLoc, 2895 Expr *Operand, 2896 SourceLocation RParenLoc); 2897 2898 /// ActOnCXXUuidof - Parse __uuidof( something ). 2899 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 2900 SourceLocation LParenLoc, bool isType, 2901 void *TyOrExpr, 2902 SourceLocation RParenLoc); 2903 2904 2905 //// ActOnCXXThis - Parse 'this' pointer. 2906 ExprResult ActOnCXXThis(SourceLocation loc); 2907 2908 /// getAndCaptureCurrentThisType - Try to capture a 'this' pointer. Returns 2909 /// the type of the 'this' pointer, or a null type if this is not possible. 2910 QualType getAndCaptureCurrentThisType(); 2911 2912 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 2913 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 2914 2915 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 2916 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 2917 2918 //// ActOnCXXThrow - Parse throw expressions. 2919 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 2920 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 2921 bool IsThrownVarInScope); 2922 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 2923 bool IsThrownVarInScope); 2924 2925 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 2926 /// Can be interpreted either as function-style casting ("int(x)") 2927 /// or class type construction ("ClassType(x,y,z)") 2928 /// or creation of a value-initialized type ("int()"). 2929 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 2930 SourceLocation LParenLoc, 2931 MultiExprArg Exprs, 2932 SourceLocation RParenLoc); 2933 2934 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 2935 SourceLocation LParenLoc, 2936 MultiExprArg Exprs, 2937 SourceLocation RParenLoc); 2938 2939 /// ActOnCXXNew - Parsed a C++ 'new' expression. 2940 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 2941 SourceLocation PlacementLParen, 2942 MultiExprArg PlacementArgs, 2943 SourceLocation PlacementRParen, 2944 SourceRange TypeIdParens, Declarator &D, 2945 SourceLocation ConstructorLParen, 2946 MultiExprArg ConstructorArgs, 2947 SourceLocation ConstructorRParen); 2948 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 2949 SourceLocation PlacementLParen, 2950 MultiExprArg PlacementArgs, 2951 SourceLocation PlacementRParen, 2952 SourceRange TypeIdParens, 2953 QualType AllocType, 2954 TypeSourceInfo *AllocTypeInfo, 2955 Expr *ArraySize, 2956 SourceLocation ConstructorLParen, 2957 MultiExprArg ConstructorArgs, 2958 SourceLocation ConstructorRParen, 2959 bool TypeMayContainAuto = true); 2960 2961 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 2962 SourceRange R); 2963 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 2964 bool UseGlobal, QualType AllocType, bool IsArray, 2965 Expr **PlaceArgs, unsigned NumPlaceArgs, 2966 FunctionDecl *&OperatorNew, 2967 FunctionDecl *&OperatorDelete); 2968 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 2969 DeclarationName Name, Expr** Args, 2970 unsigned NumArgs, DeclContext *Ctx, 2971 bool AllowMissing, FunctionDecl *&Operator, 2972 bool Diagnose = true); 2973 void DeclareGlobalNewDelete(); 2974 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 2975 QualType Argument, 2976 bool addMallocAttr = false); 2977 2978 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 2979 DeclarationName Name, FunctionDecl* &Operator, 2980 bool Diagnose = true); 2981 2982 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 2983 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 2984 bool UseGlobal, bool ArrayForm, 2985 Expr *Operand); 2986 2987 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 2988 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 2989 SourceLocation StmtLoc, 2990 bool ConvertToBoolean); 2991 2992 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 2993 Expr *Operand, SourceLocation RParen); 2994 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 2995 SourceLocation RParen); 2996 2997 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 2998 /// pseudo-functions. 2999 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 3000 SourceLocation KWLoc, 3001 ParsedType Ty, 3002 SourceLocation RParen); 3003 3004 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3005 SourceLocation KWLoc, 3006 TypeSourceInfo *T, 3007 SourceLocation RParen); 3008 3009 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3010 /// pseudo-functions. 3011 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3012 SourceLocation KWLoc, 3013 ParsedType LhsTy, 3014 ParsedType RhsTy, 3015 SourceLocation RParen); 3016 3017 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3018 SourceLocation KWLoc, 3019 TypeSourceInfo *LhsT, 3020 TypeSourceInfo *RhsT, 3021 SourceLocation RParen); 3022 3023 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3024 /// pseudo-functions. 3025 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3026 SourceLocation KWLoc, 3027 ParsedType LhsTy, 3028 Expr *DimExpr, 3029 SourceLocation RParen); 3030 3031 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3032 SourceLocation KWLoc, 3033 TypeSourceInfo *TSInfo, 3034 Expr *DimExpr, 3035 SourceLocation RParen); 3036 3037 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3038 /// pseudo-functions. 3039 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3040 SourceLocation KWLoc, 3041 Expr *Queried, 3042 SourceLocation RParen); 3043 3044 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3045 SourceLocation KWLoc, 3046 Expr *Queried, 3047 SourceLocation RParen); 3048 3049 ExprResult ActOnStartCXXMemberReference(Scope *S, 3050 Expr *Base, 3051 SourceLocation OpLoc, 3052 tok::TokenKind OpKind, 3053 ParsedType &ObjectType, 3054 bool &MayBePseudoDestructor); 3055 3056 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3057 3058 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3059 SourceLocation OpLoc, 3060 tok::TokenKind OpKind, 3061 const CXXScopeSpec &SS, 3062 TypeSourceInfo *ScopeType, 3063 SourceLocation CCLoc, 3064 SourceLocation TildeLoc, 3065 PseudoDestructorTypeStorage DestroyedType, 3066 bool HasTrailingLParen); 3067 3068 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3069 SourceLocation OpLoc, 3070 tok::TokenKind OpKind, 3071 CXXScopeSpec &SS, 3072 UnqualifiedId &FirstTypeName, 3073 SourceLocation CCLoc, 3074 SourceLocation TildeLoc, 3075 UnqualifiedId &SecondTypeName, 3076 bool HasTrailingLParen); 3077 3078 /// MaybeCreateExprWithCleanups - If the current full-expression 3079 /// requires any cleanups, surround it with a ExprWithCleanups node. 3080 /// Otherwise, just returns the passed-in expression. 3081 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3082 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3083 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3084 3085 ExprResult ActOnFinishFullExpr(Expr *Expr); 3086 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3087 3088 // Marks SS invalid if it represents an incomplete type. 3089 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3090 3091 DeclContext *computeDeclContext(QualType T); 3092 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3093 bool EnteringContext = false); 3094 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3095 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3096 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3097 3098 /// \brief The parser has parsed a global nested-name-specifier '::'. 3099 /// 3100 /// \param S The scope in which this nested-name-specifier occurs. 3101 /// 3102 /// \param CCLoc The location of the '::'. 3103 /// 3104 /// \param SS The nested-name-specifier, which will be updated in-place 3105 /// to reflect the parsed nested-name-specifier. 3106 /// 3107 /// \returns true if an error occurred, false otherwise. 3108 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3109 CXXScopeSpec &SS); 3110 3111 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3112 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3113 3114 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3115 SourceLocation IdLoc, 3116 IdentifierInfo &II, 3117 ParsedType ObjectType); 3118 3119 bool BuildCXXNestedNameSpecifier(Scope *S, 3120 IdentifierInfo &Identifier, 3121 SourceLocation IdentifierLoc, 3122 SourceLocation CCLoc, 3123 QualType ObjectType, 3124 bool EnteringContext, 3125 CXXScopeSpec &SS, 3126 NamedDecl *ScopeLookupResult, 3127 bool ErrorRecoveryLookup); 3128 3129 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3130 /// 3131 /// \param S The scope in which this nested-name-specifier occurs. 3132 /// 3133 /// \param Identifier The identifier preceding the '::'. 3134 /// 3135 /// \param IdentifierLoc The location of the identifier. 3136 /// 3137 /// \param CCLoc The location of the '::'. 3138 /// 3139 /// \param ObjectType The type of the object, if we're parsing 3140 /// nested-name-specifier in a member access expression. 3141 /// 3142 /// \param EnteringContext Whether we're entering the context nominated by 3143 /// this nested-name-specifier. 3144 /// 3145 /// \param SS The nested-name-specifier, which is both an input 3146 /// parameter (the nested-name-specifier before this type) and an 3147 /// output parameter (containing the full nested-name-specifier, 3148 /// including this new type). 3149 /// 3150 /// \returns true if an error occurred, false otherwise. 3151 bool ActOnCXXNestedNameSpecifier(Scope *S, 3152 IdentifierInfo &Identifier, 3153 SourceLocation IdentifierLoc, 3154 SourceLocation CCLoc, 3155 ParsedType ObjectType, 3156 bool EnteringContext, 3157 CXXScopeSpec &SS); 3158 3159 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3160 IdentifierInfo &Identifier, 3161 SourceLocation IdentifierLoc, 3162 SourceLocation ColonLoc, 3163 ParsedType ObjectType, 3164 bool EnteringContext); 3165 3166 /// \brief The parser has parsed a nested-name-specifier 3167 /// 'template[opt] template-name < template-args >::'. 3168 /// 3169 /// \param S The scope in which this nested-name-specifier occurs. 3170 /// 3171 /// \param TemplateLoc The location of the 'template' keyword, if any. 3172 /// 3173 /// \param SS The nested-name-specifier, which is both an input 3174 /// parameter (the nested-name-specifier before this type) and an 3175 /// output parameter (containing the full nested-name-specifier, 3176 /// including this new type). 3177 /// 3178 /// \param TemplateLoc the location of the 'template' keyword, if any. 3179 /// \param TemplateName The template name. 3180 /// \param TemplateNameLoc The location of the template name. 3181 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3182 /// \param TemplateArgs The template arguments. 3183 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3184 /// \param CCLoc The location of the '::'. 3185 3186 /// \param EnteringContext Whether we're entering the context of the 3187 /// nested-name-specifier. 3188 /// 3189 /// 3190 /// \returns true if an error occurred, false otherwise. 3191 bool ActOnCXXNestedNameSpecifier(Scope *S, 3192 SourceLocation TemplateLoc, 3193 CXXScopeSpec &SS, 3194 TemplateTy Template, 3195 SourceLocation TemplateNameLoc, 3196 SourceLocation LAngleLoc, 3197 ASTTemplateArgsPtr TemplateArgs, 3198 SourceLocation RAngleLoc, 3199 SourceLocation CCLoc, 3200 bool EnteringContext); 3201 3202 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3203 /// that the parser can use later to reconstruct the given 3204 /// nested-name-specifier. 3205 /// 3206 /// \param SS A nested-name-specifier. 3207 /// 3208 /// \returns A pointer containing all of the information in the 3209 /// nested-name-specifier \p SS. 3210 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3211 3212 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3213 /// the nested-name-specifier structure. 3214 /// 3215 /// \param Annotation The annotation pointer, produced by 3216 /// \c SaveNestedNameSpecifierAnnotation(). 3217 /// 3218 /// \param AnnotationRange The source range corresponding to the annotation. 3219 /// 3220 /// \param SS The nested-name-specifier that will be updated with the contents 3221 /// of the annotation pointer. 3222 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3223 SourceRange AnnotationRange, 3224 CXXScopeSpec &SS); 3225 3226 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3227 3228 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3229 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3230 /// After this method is called, according to [C++ 3.4.3p3], names should be 3231 /// looked up in the declarator-id's scope, until the declarator is parsed and 3232 /// ActOnCXXExitDeclaratorScope is called. 3233 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3234 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3235 3236 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3237 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3238 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3239 /// Used to indicate that names should revert to being looked up in the 3240 /// defining scope. 3241 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3242 3243 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3244 /// initializer for the declaration 'Dcl'. 3245 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3246 /// static data member of class X, names should be looked up in the scope of 3247 /// class X. 3248 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3249 3250 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3251 /// initializer for the declaration 'Dcl'. 3252 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3253 3254 // ParseObjCStringLiteral - Parse Objective-C string literals. 3255 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3256 Expr **Strings, 3257 unsigned NumStrings); 3258 3259 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3260 TypeSourceInfo *EncodedTypeInfo, 3261 SourceLocation RParenLoc); 3262 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3263 CXXMethodDecl *Method); 3264 3265 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3266 SourceLocation EncodeLoc, 3267 SourceLocation LParenLoc, 3268 ParsedType Ty, 3269 SourceLocation RParenLoc); 3270 3271 // ParseObjCSelectorExpression - Build selector expression for @selector 3272 ExprResult ParseObjCSelectorExpression(Selector Sel, 3273 SourceLocation AtLoc, 3274 SourceLocation SelLoc, 3275 SourceLocation LParenLoc, 3276 SourceLocation RParenLoc); 3277 3278 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3279 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3280 SourceLocation AtLoc, 3281 SourceLocation ProtoLoc, 3282 SourceLocation LParenLoc, 3283 SourceLocation RParenLoc); 3284 3285 //===--------------------------------------------------------------------===// 3286 // C++ Declarations 3287 // 3288 Decl *ActOnStartLinkageSpecification(Scope *S, 3289 SourceLocation ExternLoc, 3290 SourceLocation LangLoc, 3291 StringRef Lang, 3292 SourceLocation LBraceLoc); 3293 Decl *ActOnFinishLinkageSpecification(Scope *S, 3294 Decl *LinkageSpec, 3295 SourceLocation RBraceLoc); 3296 3297 3298 //===--------------------------------------------------------------------===// 3299 // C++ Classes 3300 // 3301 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3302 const CXXScopeSpec *SS = 0); 3303 3304 Decl *ActOnAccessSpecifier(AccessSpecifier Access, 3305 SourceLocation ASLoc, 3306 SourceLocation ColonLoc); 3307 3308 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3309 Declarator &D, 3310 MultiTemplateParamsArg TemplateParameterLists, 3311 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3312 Expr *Init, bool HasDeferredInit, 3313 bool IsDefinition); 3314 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3315 Expr *Init); 3316 3317 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3318 Scope *S, 3319 CXXScopeSpec &SS, 3320 IdentifierInfo *MemberOrBase, 3321 ParsedType TemplateTypeTy, 3322 SourceLocation IdLoc, 3323 SourceLocation LParenLoc, 3324 Expr **Args, unsigned NumArgs, 3325 SourceLocation RParenLoc, 3326 SourceLocation EllipsisLoc); 3327 3328 MemInitResult BuildMemberInitializer(ValueDecl *Member, Expr **Args, 3329 unsigned NumArgs, SourceLocation IdLoc, 3330 SourceLocation LParenLoc, 3331 SourceLocation RParenLoc); 3332 3333 MemInitResult BuildBaseInitializer(QualType BaseType, 3334 TypeSourceInfo *BaseTInfo, 3335 Expr **Args, unsigned NumArgs, 3336 SourceLocation LParenLoc, 3337 SourceLocation RParenLoc, 3338 CXXRecordDecl *ClassDecl, 3339 SourceLocation EllipsisLoc); 3340 3341 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3342 Expr **Args, unsigned NumArgs, 3343 SourceLocation BaseLoc, 3344 SourceLocation RParenLoc, 3345 SourceLocation LParenLoc, 3346 CXXRecordDecl *ClassDecl); 3347 3348 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3349 CXXCtorInitializer *Initializer); 3350 3351 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3352 CXXCtorInitializer **Initializers, 3353 unsigned NumInitializers, bool AnyErrors); 3354 3355 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3356 3357 3358 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3359 /// mark all the non-trivial destructors of its members and bases as 3360 /// referenced. 3361 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3362 CXXRecordDecl *Record); 3363 3364 /// \brief The list of classes whose vtables have been used within 3365 /// this translation unit, and the source locations at which the 3366 /// first use occurred. 3367 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3368 3369 /// \brief The list of vtables that are required but have not yet been 3370 /// materialized. 3371 SmallVector<VTableUse, 16> VTableUses; 3372 3373 /// \brief The set of classes whose vtables have been used within 3374 /// this translation unit, and a bit that will be true if the vtable is 3375 /// required to be emitted (otherwise, it should be emitted only if needed 3376 /// by code generation). 3377 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3378 3379 /// \brief Load any externally-stored vtable uses. 3380 void LoadExternalVTableUses(); 3381 3382 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 3383 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 3384 DynamicClassesType; 3385 3386 /// \brief A list of all of the dynamic classes in this translation 3387 /// unit. 3388 DynamicClassesType DynamicClasses; 3389 3390 /// \brief Note that the vtable for the given class was used at the 3391 /// given location. 3392 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3393 bool DefinitionRequired = false); 3394 3395 /// MarkVirtualMembersReferenced - Will mark all members of the given 3396 /// CXXRecordDecl referenced. 3397 void MarkVirtualMembersReferenced(SourceLocation Loc, 3398 const CXXRecordDecl *RD); 3399 3400 /// \brief Define all of the vtables that have been used in this 3401 /// translation unit and reference any virtual members used by those 3402 /// vtables. 3403 /// 3404 /// \returns true if any work was done, false otherwise. 3405 bool DefineUsedVTables(); 3406 3407 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3408 3409 void ActOnMemInitializers(Decl *ConstructorDecl, 3410 SourceLocation ColonLoc, 3411 MemInitTy **MemInits, unsigned NumMemInits, 3412 bool AnyErrors); 3413 3414 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3415 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3416 Decl *TagDecl, 3417 SourceLocation LBrac, 3418 SourceLocation RBrac, 3419 AttributeList *AttrList); 3420 3421 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3422 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3423 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3424 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3425 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3426 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3427 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3428 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3429 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3430 bool IsInsideALocalClassWithinATemplateFunction(); 3431 3432 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3433 Expr *AssertExpr, 3434 Expr *AssertMessageExpr, 3435 SourceLocation RParenLoc); 3436 3437 FriendDecl *CheckFriendTypeDecl(SourceLocation FriendLoc, 3438 TypeSourceInfo *TSInfo); 3439 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3440 MultiTemplateParamsArg TemplateParams); 3441 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, bool IsDefinition, 3442 MultiTemplateParamsArg TemplateParams); 3443 3444 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3445 StorageClass& SC); 3446 void CheckConstructor(CXXConstructorDecl *Constructor); 3447 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3448 StorageClass& SC); 3449 bool CheckDestructor(CXXDestructorDecl *Destructor); 3450 void CheckConversionDeclarator(Declarator &D, QualType &R, 3451 StorageClass& SC); 3452 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3453 3454 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3455 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3456 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3457 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3458 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3459 3460 //===--------------------------------------------------------------------===// 3461 // C++ Derived Classes 3462 // 3463 3464 /// ActOnBaseSpecifier - Parsed a base specifier 3465 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3466 SourceRange SpecifierRange, 3467 bool Virtual, AccessSpecifier Access, 3468 TypeSourceInfo *TInfo, 3469 SourceLocation EllipsisLoc); 3470 3471 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3472 SourceRange SpecifierRange, 3473 bool Virtual, AccessSpecifier Access, 3474 ParsedType basetype, 3475 SourceLocation BaseLoc, 3476 SourceLocation EllipsisLoc); 3477 3478 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3479 unsigned NumBases); 3480 void ActOnBaseSpecifiers(Decl *ClassDecl, BaseTy **Bases, unsigned NumBases); 3481 3482 bool IsDerivedFrom(QualType Derived, QualType Base); 3483 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3484 3485 // FIXME: I don't like this name. 3486 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3487 3488 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3489 3490 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3491 SourceLocation Loc, SourceRange Range, 3492 CXXCastPath *BasePath = 0, 3493 bool IgnoreAccess = false); 3494 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3495 unsigned InaccessibleBaseID, 3496 unsigned AmbigiousBaseConvID, 3497 SourceLocation Loc, SourceRange Range, 3498 DeclarationName Name, 3499 CXXCastPath *BasePath); 3500 3501 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3502 3503 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3504 /// covariant, according to C++ [class.virtual]p5. 3505 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3506 const CXXMethodDecl *Old); 3507 3508 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3509 /// spec is a subset of base spec. 3510 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3511 const CXXMethodDecl *Old); 3512 3513 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3514 3515 /// CheckOverrideControl - Check C++0x override control semantics. 3516 void CheckOverrideControl(const Decl *D); 3517 3518 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3519 /// overrides a virtual member function marked 'final', according to 3520 /// C++0x [class.virtual]p3. 3521 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3522 const CXXMethodDecl *Old); 3523 3524 3525 //===--------------------------------------------------------------------===// 3526 // C++ Access Control 3527 // 3528 3529 enum AccessResult { 3530 AR_accessible, 3531 AR_inaccessible, 3532 AR_dependent, 3533 AR_delayed 3534 }; 3535 3536 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3537 NamedDecl *PrevMemberDecl, 3538 AccessSpecifier LexicalAS); 3539 3540 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3541 DeclAccessPair FoundDecl); 3542 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3543 DeclAccessPair FoundDecl); 3544 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3545 SourceRange PlacementRange, 3546 CXXRecordDecl *NamingClass, 3547 DeclAccessPair FoundDecl, 3548 bool Diagnose = true); 3549 AccessResult CheckConstructorAccess(SourceLocation Loc, 3550 CXXConstructorDecl *D, 3551 const InitializedEntity &Entity, 3552 AccessSpecifier Access, 3553 bool IsCopyBindingRefToTemp = false); 3554 AccessResult CheckConstructorAccess(SourceLocation Loc, 3555 CXXConstructorDecl *D, 3556 AccessSpecifier Access, 3557 PartialDiagnostic PD); 3558 AccessResult CheckDestructorAccess(SourceLocation Loc, 3559 CXXDestructorDecl *Dtor, 3560 const PartialDiagnostic &PDiag); 3561 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3562 NamedDecl *D, 3563 const PartialDiagnostic &PDiag); 3564 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3565 Expr *ObjectExpr, 3566 Expr *ArgExpr, 3567 DeclAccessPair FoundDecl); 3568 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3569 DeclAccessPair FoundDecl); 3570 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3571 QualType Base, QualType Derived, 3572 const CXXBasePath &Path, 3573 unsigned DiagID, 3574 bool ForceCheck = false, 3575 bool ForceUnprivileged = false); 3576 void CheckLookupAccess(const LookupResult &R); 3577 3578 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3579 const MultiLevelTemplateArgumentList &TemplateArgs); 3580 void PerformDependentDiagnostics(const DeclContext *Pattern, 3581 const MultiLevelTemplateArgumentList &TemplateArgs); 3582 3583 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3584 3585 /// A flag to suppress access checking. 3586 bool SuppressAccessChecking; 3587 3588 /// \brief When true, access checking violations are treated as SFINAE 3589 /// failures rather than hard errors. 3590 bool AccessCheckingSFINAE; 3591 3592 void ActOnStartSuppressingAccessChecks(); 3593 void ActOnStopSuppressingAccessChecks(); 3594 3595 enum AbstractDiagSelID { 3596 AbstractNone = -1, 3597 AbstractReturnType, 3598 AbstractParamType, 3599 AbstractVariableType, 3600 AbstractFieldType, 3601 AbstractArrayType 3602 }; 3603 3604 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3605 const PartialDiagnostic &PD); 3606 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3607 3608 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3609 AbstractDiagSelID SelID = AbstractNone); 3610 3611 //===--------------------------------------------------------------------===// 3612 // C++ Overloaded Operators [C++ 13.5] 3613 // 3614 3615 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3616 3617 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3618 3619 //===--------------------------------------------------------------------===// 3620 // C++ Templates [C++ 14] 3621 // 3622 void FilterAcceptableTemplateNames(LookupResult &R); 3623 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3624 3625 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3626 QualType ObjectType, bool EnteringContext, 3627 bool &MemberOfUnknownSpecialization); 3628 3629 TemplateNameKind isTemplateName(Scope *S, 3630 CXXScopeSpec &SS, 3631 bool hasTemplateKeyword, 3632 UnqualifiedId &Name, 3633 ParsedType ObjectType, 3634 bool EnteringContext, 3635 TemplateTy &Template, 3636 bool &MemberOfUnknownSpecialization); 3637 3638 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3639 SourceLocation IILoc, 3640 Scope *S, 3641 const CXXScopeSpec *SS, 3642 TemplateTy &SuggestedTemplate, 3643 TemplateNameKind &SuggestedKind); 3644 3645 bool DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3646 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3647 3648 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3649 SourceLocation EllipsisLoc, 3650 SourceLocation KeyLoc, 3651 IdentifierInfo *ParamName, 3652 SourceLocation ParamNameLoc, 3653 unsigned Depth, unsigned Position, 3654 SourceLocation EqualLoc, 3655 ParsedType DefaultArg); 3656 3657 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3658 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3659 unsigned Depth, 3660 unsigned Position, 3661 SourceLocation EqualLoc, 3662 Expr *DefaultArg); 3663 Decl *ActOnTemplateTemplateParameter(Scope *S, 3664 SourceLocation TmpLoc, 3665 TemplateParamsTy *Params, 3666 SourceLocation EllipsisLoc, 3667 IdentifierInfo *ParamName, 3668 SourceLocation ParamNameLoc, 3669 unsigned Depth, 3670 unsigned Position, 3671 SourceLocation EqualLoc, 3672 ParsedTemplateArgument DefaultArg); 3673 3674 TemplateParamsTy * 3675 ActOnTemplateParameterList(unsigned Depth, 3676 SourceLocation ExportLoc, 3677 SourceLocation TemplateLoc, 3678 SourceLocation LAngleLoc, 3679 Decl **Params, unsigned NumParams, 3680 SourceLocation RAngleLoc); 3681 3682 /// \brief The context in which we are checking a template parameter 3683 /// list. 3684 enum TemplateParamListContext { 3685 TPC_ClassTemplate, 3686 TPC_FunctionTemplate, 3687 TPC_ClassTemplateMember, 3688 TPC_FriendFunctionTemplate, 3689 TPC_FriendFunctionTemplateDefinition, 3690 TPC_TypeAliasTemplate 3691 }; 3692 3693 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3694 TemplateParameterList *OldParams, 3695 TemplateParamListContext TPC); 3696 TemplateParameterList * 3697 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3698 SourceLocation DeclLoc, 3699 const CXXScopeSpec &SS, 3700 TemplateParameterList **ParamLists, 3701 unsigned NumParamLists, 3702 bool IsFriend, 3703 bool &IsExplicitSpecialization, 3704 bool &Invalid); 3705 3706 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3707 SourceLocation KWLoc, CXXScopeSpec &SS, 3708 IdentifierInfo *Name, SourceLocation NameLoc, 3709 AttributeList *Attr, 3710 TemplateParameterList *TemplateParams, 3711 AccessSpecifier AS, 3712 unsigned NumOuterTemplateParamLists, 3713 TemplateParameterList **OuterTemplateParamLists); 3714 3715 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3716 TemplateArgumentListInfo &Out); 3717 3718 void NoteAllFoundTemplates(TemplateName Name); 3719 3720 QualType CheckTemplateIdType(TemplateName Template, 3721 SourceLocation TemplateLoc, 3722 TemplateArgumentListInfo &TemplateArgs); 3723 3724 TypeResult 3725 ActOnTemplateIdType(CXXScopeSpec &SS, 3726 TemplateTy Template, SourceLocation TemplateLoc, 3727 SourceLocation LAngleLoc, 3728 ASTTemplateArgsPtr TemplateArgs, 3729 SourceLocation RAngleLoc); 3730 3731 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3732 /// such as \c class T::template apply<U>. 3733 /// 3734 /// \param TUK 3735 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3736 TypeSpecifierType TagSpec, 3737 SourceLocation TagLoc, 3738 CXXScopeSpec &SS, 3739 TemplateTy TemplateD, 3740 SourceLocation TemplateLoc, 3741 SourceLocation LAngleLoc, 3742 ASTTemplateArgsPtr TemplateArgsIn, 3743 SourceLocation RAngleLoc); 3744 3745 3746 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3747 LookupResult &R, 3748 bool RequiresADL, 3749 const TemplateArgumentListInfo &TemplateArgs); 3750 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3751 const DeclarationNameInfo &NameInfo, 3752 const TemplateArgumentListInfo &TemplateArgs); 3753 3754 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3755 SourceLocation TemplateKWLoc, 3756 CXXScopeSpec &SS, 3757 UnqualifiedId &Name, 3758 ParsedType ObjectType, 3759 bool EnteringContext, 3760 TemplateTy &Template); 3761 3762 DeclResult 3763 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3764 SourceLocation KWLoc, 3765 CXXScopeSpec &SS, 3766 TemplateTy Template, 3767 SourceLocation TemplateNameLoc, 3768 SourceLocation LAngleLoc, 3769 ASTTemplateArgsPtr TemplateArgs, 3770 SourceLocation RAngleLoc, 3771 AttributeList *Attr, 3772 MultiTemplateParamsArg TemplateParameterLists); 3773 3774 Decl *ActOnTemplateDeclarator(Scope *S, 3775 MultiTemplateParamsArg TemplateParameterLists, 3776 Declarator &D); 3777 3778 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3779 MultiTemplateParamsArg TemplateParameterLists, 3780 Declarator &D); 3781 3782 bool 3783 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3784 TemplateSpecializationKind NewTSK, 3785 NamedDecl *PrevDecl, 3786 TemplateSpecializationKind PrevTSK, 3787 SourceLocation PrevPtOfInstantiation, 3788 bool &SuppressNew); 3789 3790 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3791 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3792 LookupResult &Previous); 3793 3794 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 3795 TemplateArgumentListInfo *ExplicitTemplateArgs, 3796 LookupResult &Previous); 3797 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 3798 3799 DeclResult 3800 ActOnExplicitInstantiation(Scope *S, 3801 SourceLocation ExternLoc, 3802 SourceLocation TemplateLoc, 3803 unsigned TagSpec, 3804 SourceLocation KWLoc, 3805 const CXXScopeSpec &SS, 3806 TemplateTy Template, 3807 SourceLocation TemplateNameLoc, 3808 SourceLocation LAngleLoc, 3809 ASTTemplateArgsPtr TemplateArgs, 3810 SourceLocation RAngleLoc, 3811 AttributeList *Attr); 3812 3813 DeclResult 3814 ActOnExplicitInstantiation(Scope *S, 3815 SourceLocation ExternLoc, 3816 SourceLocation TemplateLoc, 3817 unsigned TagSpec, 3818 SourceLocation KWLoc, 3819 CXXScopeSpec &SS, 3820 IdentifierInfo *Name, 3821 SourceLocation NameLoc, 3822 AttributeList *Attr); 3823 3824 DeclResult ActOnExplicitInstantiation(Scope *S, 3825 SourceLocation ExternLoc, 3826 SourceLocation TemplateLoc, 3827 Declarator &D); 3828 3829 TemplateArgumentLoc 3830 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 3831 SourceLocation TemplateLoc, 3832 SourceLocation RAngleLoc, 3833 Decl *Param, 3834 SmallVectorImpl<TemplateArgument> &Converted); 3835 3836 /// \brief Specifies the context in which a particular template 3837 /// argument is being checked. 3838 enum CheckTemplateArgumentKind { 3839 /// \brief The template argument was specified in the code or was 3840 /// instantiated with some deduced template arguments. 3841 CTAK_Specified, 3842 3843 /// \brief The template argument was deduced via template argument 3844 /// deduction. 3845 CTAK_Deduced, 3846 3847 /// \brief The template argument was deduced from an array bound 3848 /// via template argument deduction. 3849 CTAK_DeducedFromArrayBound 3850 }; 3851 3852 bool CheckTemplateArgument(NamedDecl *Param, 3853 const TemplateArgumentLoc &Arg, 3854 NamedDecl *Template, 3855 SourceLocation TemplateLoc, 3856 SourceLocation RAngleLoc, 3857 unsigned ArgumentPackIndex, 3858 SmallVectorImpl<TemplateArgument> &Converted, 3859 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3860 3861 /// \brief Check that the given template arguments can be be provided to 3862 /// the given template, converting the arguments along the way. 3863 /// 3864 /// \param Template The template to which the template arguments are being 3865 /// provided. 3866 /// 3867 /// \param TemplateLoc The location of the template name in the source. 3868 /// 3869 /// \param TemplateArgs The list of template arguments. If the template is 3870 /// a template template parameter, this function may extend the set of 3871 /// template arguments to also include substituted, defaulted template 3872 /// arguments. 3873 /// 3874 /// \param PartialTemplateArgs True if the list of template arguments is 3875 /// intentionally partial, e.g., because we're checking just the initial 3876 /// set of template arguments. 3877 /// 3878 /// \param Converted Will receive the converted, canonicalized template 3879 /// arguments. 3880 /// 3881 /// \returns True if an error occurred, false otherwise. 3882 bool CheckTemplateArgumentList(TemplateDecl *Template, 3883 SourceLocation TemplateLoc, 3884 TemplateArgumentListInfo &TemplateArgs, 3885 bool PartialTemplateArgs, 3886 SmallVectorImpl<TemplateArgument> &Converted); 3887 3888 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 3889 const TemplateArgumentLoc &Arg, 3890 SmallVectorImpl<TemplateArgument> &Converted); 3891 3892 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 3893 TypeSourceInfo *Arg); 3894 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 3895 TemplateArgument &Converted); 3896 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 3897 QualType InstantiatedParamType, Expr *Arg, 3898 TemplateArgument &Converted, 3899 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3900 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 3901 const TemplateArgumentLoc &Arg); 3902 3903 ExprResult 3904 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 3905 QualType ParamType, 3906 SourceLocation Loc); 3907 ExprResult 3908 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 3909 SourceLocation Loc); 3910 3911 /// \brief Enumeration describing how template parameter lists are compared 3912 /// for equality. 3913 enum TemplateParameterListEqualKind { 3914 /// \brief We are matching the template parameter lists of two templates 3915 /// that might be redeclarations. 3916 /// 3917 /// \code 3918 /// template<typename T> struct X; 3919 /// template<typename T> struct X; 3920 /// \endcode 3921 TPL_TemplateMatch, 3922 3923 /// \brief We are matching the template parameter lists of two template 3924 /// template parameters as part of matching the template parameter lists 3925 /// of two templates that might be redeclarations. 3926 /// 3927 /// \code 3928 /// template<template<int I> class TT> struct X; 3929 /// template<template<int Value> class Other> struct X; 3930 /// \endcode 3931 TPL_TemplateTemplateParmMatch, 3932 3933 /// \brief We are matching the template parameter lists of a template 3934 /// template argument against the template parameter lists of a template 3935 /// template parameter. 3936 /// 3937 /// \code 3938 /// template<template<int Value> class Metafun> struct X; 3939 /// template<int Value> struct integer_c; 3940 /// X<integer_c> xic; 3941 /// \endcode 3942 TPL_TemplateTemplateArgumentMatch 3943 }; 3944 3945 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 3946 TemplateParameterList *Old, 3947 bool Complain, 3948 TemplateParameterListEqualKind Kind, 3949 SourceLocation TemplateArgLoc 3950 = SourceLocation()); 3951 3952 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 3953 3954 /// \brief Called when the parser has parsed a C++ typename 3955 /// specifier, e.g., "typename T::type". 3956 /// 3957 /// \param S The scope in which this typename type occurs. 3958 /// \param TypenameLoc the location of the 'typename' keyword 3959 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3960 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 3961 /// \param IdLoc the location of the identifier. 3962 TypeResult 3963 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3964 const CXXScopeSpec &SS, const IdentifierInfo &II, 3965 SourceLocation IdLoc); 3966 3967 /// \brief Called when the parser has parsed a C++ typename 3968 /// specifier that ends in a template-id, e.g., 3969 /// "typename MetaFun::template apply<T1, T2>". 3970 /// 3971 /// \param S The scope in which this typename type occurs. 3972 /// \param TypenameLoc the location of the 'typename' keyword 3973 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3974 /// \param TemplateLoc the location of the 'template' keyword, if any. 3975 /// \param TemplateName The template name. 3976 /// \param TemplateNameLoc The location of the template name. 3977 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3978 /// \param TemplateArgs The template arguments. 3979 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3980 TypeResult 3981 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3982 const CXXScopeSpec &SS, 3983 SourceLocation TemplateLoc, 3984 TemplateTy Template, 3985 SourceLocation TemplateNameLoc, 3986 SourceLocation LAngleLoc, 3987 ASTTemplateArgsPtr TemplateArgs, 3988 SourceLocation RAngleLoc); 3989 3990 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 3991 SourceLocation KeywordLoc, 3992 NestedNameSpecifierLoc QualifierLoc, 3993 const IdentifierInfo &II, 3994 SourceLocation IILoc); 3995 3996 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 3997 SourceLocation Loc, 3998 DeclarationName Name); 3999 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 4000 4001 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 4002 4003 std::string 4004 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4005 const TemplateArgumentList &Args); 4006 4007 std::string 4008 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4009 const TemplateArgument *Args, 4010 unsigned NumArgs); 4011 4012 //===--------------------------------------------------------------------===// 4013 // C++ Variadic Templates (C++0x [temp.variadic]) 4014 //===--------------------------------------------------------------------===// 4015 4016 /// \brief The context in which an unexpanded parameter pack is 4017 /// being diagnosed. 4018 /// 4019 /// Note that the values of this enumeration line up with the first 4020 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4021 enum UnexpandedParameterPackContext { 4022 /// \brief An arbitrary expression. 4023 UPPC_Expression = 0, 4024 4025 /// \brief The base type of a class type. 4026 UPPC_BaseType, 4027 4028 /// \brief The type of an arbitrary declaration. 4029 UPPC_DeclarationType, 4030 4031 /// \brief The type of a data member. 4032 UPPC_DataMemberType, 4033 4034 /// \brief The size of a bit-field. 4035 UPPC_BitFieldWidth, 4036 4037 /// \brief The expression in a static assertion. 4038 UPPC_StaticAssertExpression, 4039 4040 /// \brief The fixed underlying type of an enumeration. 4041 UPPC_FixedUnderlyingType, 4042 4043 /// \brief The enumerator value. 4044 UPPC_EnumeratorValue, 4045 4046 /// \brief A using declaration. 4047 UPPC_UsingDeclaration, 4048 4049 /// \brief A friend declaration. 4050 UPPC_FriendDeclaration, 4051 4052 /// \brief A declaration qualifier. 4053 UPPC_DeclarationQualifier, 4054 4055 /// \brief An initializer. 4056 UPPC_Initializer, 4057 4058 /// \brief A default argument. 4059 UPPC_DefaultArgument, 4060 4061 /// \brief The type of a non-type template parameter. 4062 UPPC_NonTypeTemplateParameterType, 4063 4064 /// \brief The type of an exception. 4065 UPPC_ExceptionType, 4066 4067 /// \brief Partial specialization. 4068 UPPC_PartialSpecialization 4069 }; 4070 4071 /// \brief If the given type contains an unexpanded parameter pack, 4072 /// diagnose the error. 4073 /// 4074 /// \param Loc The source location where a diagnostc should be emitted. 4075 /// 4076 /// \param T The type that is being checked for unexpanded parameter 4077 /// packs. 4078 /// 4079 /// \returns true if an error occurred, false otherwise. 4080 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4081 UnexpandedParameterPackContext UPPC); 4082 4083 /// \brief If the given expression contains an unexpanded parameter 4084 /// pack, diagnose the error. 4085 /// 4086 /// \param E The expression that is being checked for unexpanded 4087 /// parameter packs. 4088 /// 4089 /// \returns true if an error occurred, false otherwise. 4090 bool DiagnoseUnexpandedParameterPack(Expr *E, 4091 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4092 4093 /// \brief If the given nested-name-specifier contains an unexpanded 4094 /// parameter pack, diagnose the error. 4095 /// 4096 /// \param SS The nested-name-specifier that is being checked for 4097 /// unexpanded parameter packs. 4098 /// 4099 /// \returns true if an error occurred, false otherwise. 4100 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4101 UnexpandedParameterPackContext UPPC); 4102 4103 /// \brief If the given name contains an unexpanded parameter pack, 4104 /// diagnose the error. 4105 /// 4106 /// \param NameInfo The name (with source location information) that 4107 /// is being checked for unexpanded parameter packs. 4108 /// 4109 /// \returns true if an error occurred, false otherwise. 4110 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4111 UnexpandedParameterPackContext UPPC); 4112 4113 /// \brief If the given template name contains an unexpanded parameter pack, 4114 /// diagnose the error. 4115 /// 4116 /// \param Loc The location of the template name. 4117 /// 4118 /// \param Template The template name that is being checked for unexpanded 4119 /// parameter packs. 4120 /// 4121 /// \returns true if an error occurred, false otherwise. 4122 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4123 TemplateName Template, 4124 UnexpandedParameterPackContext UPPC); 4125 4126 /// \brief If the given template argument contains an unexpanded parameter 4127 /// pack, diagnose the error. 4128 /// 4129 /// \param Arg The template argument that is being checked for unexpanded 4130 /// parameter packs. 4131 /// 4132 /// \returns true if an error occurred, false otherwise. 4133 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4134 UnexpandedParameterPackContext UPPC); 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(TemplateArgument Arg, 4142 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4143 4144 /// \brief Collect the set of unexpanded parameter packs within the given 4145 /// template argument. 4146 /// 4147 /// \param Arg The template argument that will be traversed to find 4148 /// unexpanded parameter packs. 4149 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4150 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4151 4152 /// \brief Collect the set of unexpanded parameter packs within the given 4153 /// type. 4154 /// 4155 /// \param T The type that will be traversed to find 4156 /// unexpanded parameter packs. 4157 void collectUnexpandedParameterPacks(QualType T, 4158 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4159 4160 /// \brief Collect the set of unexpanded parameter packs within the given 4161 /// type. 4162 /// 4163 /// \param TL The type that will be traversed to find 4164 /// unexpanded parameter packs. 4165 void collectUnexpandedParameterPacks(TypeLoc TL, 4166 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4167 4168 /// \brief Invoked when parsing a template argument followed by an 4169 /// ellipsis, which creates a pack expansion. 4170 /// 4171 /// \param Arg The template argument preceding the ellipsis, which 4172 /// may already be invalid. 4173 /// 4174 /// \param EllipsisLoc The location of the ellipsis. 4175 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4176 SourceLocation EllipsisLoc); 4177 4178 /// \brief Invoked when parsing a type followed by an ellipsis, which 4179 /// creates a pack expansion. 4180 /// 4181 /// \param Type The type preceding the ellipsis, which will become 4182 /// the pattern of the pack expansion. 4183 /// 4184 /// \param EllipsisLoc The location of the ellipsis. 4185 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4186 4187 /// \brief Construct a pack expansion type from the pattern of the pack 4188 /// expansion. 4189 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4190 SourceLocation EllipsisLoc, 4191 llvm::Optional<unsigned> NumExpansions); 4192 4193 /// \brief Construct a pack expansion type from the pattern of the pack 4194 /// expansion. 4195 QualType CheckPackExpansion(QualType Pattern, 4196 SourceRange PatternRange, 4197 SourceLocation EllipsisLoc, 4198 llvm::Optional<unsigned> NumExpansions); 4199 4200 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4201 /// creates a pack expansion. 4202 /// 4203 /// \param Pattern The expression preceding the ellipsis, which will become 4204 /// the pattern of the pack expansion. 4205 /// 4206 /// \param EllipsisLoc The location of the ellipsis. 4207 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4208 4209 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4210 /// creates a pack expansion. 4211 /// 4212 /// \param Pattern The expression preceding the ellipsis, which will become 4213 /// the pattern of the pack expansion. 4214 /// 4215 /// \param EllipsisLoc The location of the ellipsis. 4216 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4217 llvm::Optional<unsigned> NumExpansions); 4218 4219 /// \brief Determine whether we could expand a pack expansion with the 4220 /// given set of parameter packs into separate arguments by repeatedly 4221 /// transforming the pattern. 4222 /// 4223 /// \param EllipsisLoc The location of the ellipsis that identifies the 4224 /// pack expansion. 4225 /// 4226 /// \param PatternRange The source range that covers the entire pattern of 4227 /// the pack expansion. 4228 /// 4229 /// \param Unexpanded The set of unexpanded parameter packs within the 4230 /// pattern. 4231 /// 4232 /// \param NumUnexpanded The number of unexpanded parameter packs in 4233 /// \p Unexpanded. 4234 /// 4235 /// \param ShouldExpand Will be set to \c true if the transformer should 4236 /// expand the corresponding pack expansions into separate arguments. When 4237 /// set, \c NumExpansions must also be set. 4238 /// 4239 /// \param RetainExpansion Whether the caller should add an unexpanded 4240 /// pack expansion after all of the expanded arguments. This is used 4241 /// when extending explicitly-specified template argument packs per 4242 /// C++0x [temp.arg.explicit]p9. 4243 /// 4244 /// \param NumExpansions The number of separate arguments that will be in 4245 /// the expanded form of the corresponding pack expansion. This is both an 4246 /// input and an output parameter, which can be set by the caller if the 4247 /// number of expansions is known a priori (e.g., due to a prior substitution) 4248 /// and will be set by the callee when the number of expansions is known. 4249 /// The callee must set this value when \c ShouldExpand is \c true; it may 4250 /// set this value in other cases. 4251 /// 4252 /// \returns true if an error occurred (e.g., because the parameter packs 4253 /// are to be instantiated with arguments of different lengths), false 4254 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4255 /// must be set. 4256 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4257 SourceRange PatternRange, 4258 const UnexpandedParameterPack *Unexpanded, 4259 unsigned NumUnexpanded, 4260 const MultiLevelTemplateArgumentList &TemplateArgs, 4261 bool &ShouldExpand, 4262 bool &RetainExpansion, 4263 llvm::Optional<unsigned> &NumExpansions); 4264 4265 /// \brief Determine the number of arguments in the given pack expansion 4266 /// type. 4267 /// 4268 /// This routine already assumes that the pack expansion type can be 4269 /// expanded and that the number of arguments in the expansion is 4270 /// consistent across all of the unexpanded parameter packs in its pattern. 4271 unsigned getNumArgumentsInExpansion(QualType T, 4272 const MultiLevelTemplateArgumentList &TemplateArgs); 4273 4274 /// \brief Determine whether the given declarator contains any unexpanded 4275 /// parameter packs. 4276 /// 4277 /// This routine is used by the parser to disambiguate function declarators 4278 /// with an ellipsis prior to the ')', e.g., 4279 /// 4280 /// \code 4281 /// void f(T...); 4282 /// \endcode 4283 /// 4284 /// To determine whether we have an (unnamed) function parameter pack or 4285 /// a variadic function. 4286 /// 4287 /// \returns true if the declarator contains any unexpanded parameter packs, 4288 /// false otherwise. 4289 bool containsUnexpandedParameterPacks(Declarator &D); 4290 4291 //===--------------------------------------------------------------------===// 4292 // C++ Template Argument Deduction (C++ [temp.deduct]) 4293 //===--------------------------------------------------------------------===// 4294 4295 /// \brief Describes the result of template argument deduction. 4296 /// 4297 /// The TemplateDeductionResult enumeration describes the result of 4298 /// template argument deduction, as returned from 4299 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4300 /// structure provides additional information about the results of 4301 /// template argument deduction, e.g., the deduced template argument 4302 /// list (if successful) or the specific template parameters or 4303 /// deduced arguments that were involved in the failure. 4304 enum TemplateDeductionResult { 4305 /// \brief Template argument deduction was successful. 4306 TDK_Success = 0, 4307 /// \brief Template argument deduction exceeded the maximum template 4308 /// instantiation depth (which has already been diagnosed). 4309 TDK_InstantiationDepth, 4310 /// \brief Template argument deduction did not deduce a value 4311 /// for every template parameter. 4312 TDK_Incomplete, 4313 /// \brief Template argument deduction produced inconsistent 4314 /// deduced values for the given template parameter. 4315 TDK_Inconsistent, 4316 /// \brief Template argument deduction failed due to inconsistent 4317 /// cv-qualifiers on a template parameter type that would 4318 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4319 /// but were given a non-const "X". 4320 TDK_Underqualified, 4321 /// \brief Substitution of the deduced template argument values 4322 /// resulted in an error. 4323 TDK_SubstitutionFailure, 4324 /// \brief Substitution of the deduced template argument values 4325 /// into a non-deduced context produced a type or value that 4326 /// produces a type that does not match the original template 4327 /// arguments provided. 4328 TDK_NonDeducedMismatch, 4329 /// \brief When performing template argument deduction for a function 4330 /// template, there were too many call arguments. 4331 TDK_TooManyArguments, 4332 /// \brief When performing template argument deduction for a function 4333 /// template, there were too few call arguments. 4334 TDK_TooFewArguments, 4335 /// \brief The explicitly-specified template arguments were not valid 4336 /// template arguments for the given template. 4337 TDK_InvalidExplicitArguments, 4338 /// \brief The arguments included an overloaded function name that could 4339 /// not be resolved to a suitable function. 4340 TDK_FailedOverloadResolution 4341 }; 4342 4343 TemplateDeductionResult 4344 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4345 const TemplateArgumentList &TemplateArgs, 4346 sema::TemplateDeductionInfo &Info); 4347 4348 TemplateDeductionResult 4349 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4350 TemplateArgumentListInfo &ExplicitTemplateArgs, 4351 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4352 SmallVectorImpl<QualType> &ParamTypes, 4353 QualType *FunctionType, 4354 sema::TemplateDeductionInfo &Info); 4355 4356 /// brief A function argument from which we performed template argument 4357 // deduction for a call. 4358 struct OriginalCallArg { 4359 OriginalCallArg(QualType OriginalParamType, 4360 unsigned ArgIdx, 4361 QualType OriginalArgType) 4362 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4363 OriginalArgType(OriginalArgType) { } 4364 4365 QualType OriginalParamType; 4366 unsigned ArgIdx; 4367 QualType OriginalArgType; 4368 }; 4369 4370 TemplateDeductionResult 4371 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4372 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4373 unsigned NumExplicitlySpecified, 4374 FunctionDecl *&Specialization, 4375 sema::TemplateDeductionInfo &Info, 4376 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4377 4378 TemplateDeductionResult 4379 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4380 TemplateArgumentListInfo *ExplicitTemplateArgs, 4381 Expr **Args, unsigned NumArgs, 4382 FunctionDecl *&Specialization, 4383 sema::TemplateDeductionInfo &Info); 4384 4385 TemplateDeductionResult 4386 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4387 TemplateArgumentListInfo *ExplicitTemplateArgs, 4388 QualType ArgFunctionType, 4389 FunctionDecl *&Specialization, 4390 sema::TemplateDeductionInfo &Info); 4391 4392 TemplateDeductionResult 4393 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4394 QualType ToType, 4395 CXXConversionDecl *&Specialization, 4396 sema::TemplateDeductionInfo &Info); 4397 4398 TemplateDeductionResult 4399 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4400 TemplateArgumentListInfo *ExplicitTemplateArgs, 4401 FunctionDecl *&Specialization, 4402 sema::TemplateDeductionInfo &Info); 4403 4404 bool DeduceAutoType(TypeSourceInfo *AutoType, Expr *Initializer, 4405 TypeSourceInfo *&Result); 4406 4407 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4408 FunctionTemplateDecl *FT2, 4409 SourceLocation Loc, 4410 TemplatePartialOrderingContext TPOC, 4411 unsigned NumCallArguments); 4412 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4413 UnresolvedSetIterator SEnd, 4414 TemplatePartialOrderingContext TPOC, 4415 unsigned NumCallArguments, 4416 SourceLocation Loc, 4417 const PartialDiagnostic &NoneDiag, 4418 const PartialDiagnostic &AmbigDiag, 4419 const PartialDiagnostic &CandidateDiag, 4420 bool Complain = true); 4421 4422 ClassTemplatePartialSpecializationDecl * 4423 getMoreSpecializedPartialSpecialization( 4424 ClassTemplatePartialSpecializationDecl *PS1, 4425 ClassTemplatePartialSpecializationDecl *PS2, 4426 SourceLocation Loc); 4427 4428 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4429 bool OnlyDeduced, 4430 unsigned Depth, 4431 SmallVectorImpl<bool> &Used); 4432 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4433 SmallVectorImpl<bool> &Deduced); 4434 4435 //===--------------------------------------------------------------------===// 4436 // C++ Template Instantiation 4437 // 4438 4439 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4440 const TemplateArgumentList *Innermost = 0, 4441 bool RelativeToPrimary = false, 4442 const FunctionDecl *Pattern = 0); 4443 4444 /// \brief A template instantiation that is currently in progress. 4445 struct ActiveTemplateInstantiation { 4446 /// \brief The kind of template instantiation we are performing 4447 enum InstantiationKind { 4448 /// We are instantiating a template declaration. The entity is 4449 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4450 TemplateInstantiation, 4451 4452 /// We are instantiating a default argument for a template 4453 /// parameter. The Entity is the template, and 4454 /// TemplateArgs/NumTemplateArguments provides the template 4455 /// arguments as specified. 4456 /// FIXME: Use a TemplateArgumentList 4457 DefaultTemplateArgumentInstantiation, 4458 4459 /// We are instantiating a default argument for a function. 4460 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4461 /// provides the template arguments as specified. 4462 DefaultFunctionArgumentInstantiation, 4463 4464 /// We are substituting explicit template arguments provided for 4465 /// a function template. The entity is a FunctionTemplateDecl. 4466 ExplicitTemplateArgumentSubstitution, 4467 4468 /// We are substituting template argument determined as part of 4469 /// template argument deduction for either a class template 4470 /// partial specialization or a function template. The 4471 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4472 /// a FunctionTemplateDecl. 4473 DeducedTemplateArgumentSubstitution, 4474 4475 /// We are substituting prior template arguments into a new 4476 /// template parameter. The template parameter itself is either a 4477 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4478 PriorTemplateArgumentSubstitution, 4479 4480 /// We are checking the validity of a default template argument that 4481 /// has been used when naming a template-id. 4482 DefaultTemplateArgumentChecking 4483 } Kind; 4484 4485 /// \brief The point of instantiation within the source code. 4486 SourceLocation PointOfInstantiation; 4487 4488 /// \brief The template (or partial specialization) in which we are 4489 /// performing the instantiation, for substitutions of prior template 4490 /// arguments. 4491 NamedDecl *Template; 4492 4493 /// \brief The entity that is being instantiated. 4494 uintptr_t Entity; 4495 4496 /// \brief The list of template arguments we are substituting, if they 4497 /// are not part of the entity. 4498 const TemplateArgument *TemplateArgs; 4499 4500 /// \brief The number of template arguments in TemplateArgs. 4501 unsigned NumTemplateArgs; 4502 4503 /// \brief The template deduction info object associated with the 4504 /// substitution or checking of explicit or deduced template arguments. 4505 sema::TemplateDeductionInfo *DeductionInfo; 4506 4507 /// \brief The source range that covers the construct that cause 4508 /// the instantiation, e.g., the template-id that causes a class 4509 /// template instantiation. 4510 SourceRange InstantiationRange; 4511 4512 ActiveTemplateInstantiation() 4513 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4514 NumTemplateArgs(0), DeductionInfo(0) {} 4515 4516 /// \brief Determines whether this template is an actual instantiation 4517 /// that should be counted toward the maximum instantiation depth. 4518 bool isInstantiationRecord() const; 4519 4520 friend bool operator==(const ActiveTemplateInstantiation &X, 4521 const ActiveTemplateInstantiation &Y) { 4522 if (X.Kind != Y.Kind) 4523 return false; 4524 4525 if (X.Entity != Y.Entity) 4526 return false; 4527 4528 switch (X.Kind) { 4529 case TemplateInstantiation: 4530 return true; 4531 4532 case PriorTemplateArgumentSubstitution: 4533 case DefaultTemplateArgumentChecking: 4534 if (X.Template != Y.Template) 4535 return false; 4536 4537 // Fall through 4538 4539 case DefaultTemplateArgumentInstantiation: 4540 case ExplicitTemplateArgumentSubstitution: 4541 case DeducedTemplateArgumentSubstitution: 4542 case DefaultFunctionArgumentInstantiation: 4543 return X.TemplateArgs == Y.TemplateArgs; 4544 4545 } 4546 4547 return true; 4548 } 4549 4550 friend bool operator!=(const ActiveTemplateInstantiation &X, 4551 const ActiveTemplateInstantiation &Y) { 4552 return !(X == Y); 4553 } 4554 }; 4555 4556 /// \brief List of active template instantiations. 4557 /// 4558 /// This vector is treated as a stack. As one template instantiation 4559 /// requires another template instantiation, additional 4560 /// instantiations are pushed onto the stack up to a 4561 /// user-configurable limit LangOptions::InstantiationDepth. 4562 SmallVector<ActiveTemplateInstantiation, 16> 4563 ActiveTemplateInstantiations; 4564 4565 /// \brief Whether we are in a SFINAE context that is not associated with 4566 /// template instantiation. 4567 /// 4568 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4569 /// of a template instantiation or template argument deduction. 4570 bool InNonInstantiationSFINAEContext; 4571 4572 /// \brief The number of ActiveTemplateInstantiation entries in 4573 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4574 /// therefore, should not be counted as part of the instantiation depth. 4575 unsigned NonInstantiationEntries; 4576 4577 /// \brief The last template from which a template instantiation 4578 /// error or warning was produced. 4579 /// 4580 /// This value is used to suppress printing of redundant template 4581 /// instantiation backtraces when there are multiple errors in the 4582 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4583 /// to implement it anywhere else. 4584 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4585 4586 /// \brief The current index into pack expansion arguments that will be 4587 /// used for substitution of parameter packs. 4588 /// 4589 /// The pack expansion index will be -1 to indicate that parameter packs 4590 /// should be instantiated as themselves. Otherwise, the index specifies 4591 /// which argument within the parameter pack will be used for substitution. 4592 int ArgumentPackSubstitutionIndex; 4593 4594 /// \brief RAII object used to change the argument pack substitution index 4595 /// within a \c Sema object. 4596 /// 4597 /// See \c ArgumentPackSubstitutionIndex for more information. 4598 class ArgumentPackSubstitutionIndexRAII { 4599 Sema &Self; 4600 int OldSubstitutionIndex; 4601 4602 public: 4603 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4604 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4605 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4606 } 4607 4608 ~ArgumentPackSubstitutionIndexRAII() { 4609 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4610 } 4611 }; 4612 4613 friend class ArgumentPackSubstitutionRAII; 4614 4615 /// \brief The stack of calls expression undergoing template instantiation. 4616 /// 4617 /// The top of this stack is used by a fixit instantiating unresolved 4618 /// function calls to fix the AST to match the textual change it prints. 4619 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4620 4621 /// \brief For each declaration that involved template argument deduction, the 4622 /// set of diagnostics that were suppressed during that template argument 4623 /// deduction. 4624 /// 4625 /// FIXME: Serialize this structure to the AST file. 4626 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 4627 SuppressedDiagnostics; 4628 4629 /// \brief A stack object to be created when performing template 4630 /// instantiation. 4631 /// 4632 /// Construction of an object of type \c InstantiatingTemplate 4633 /// pushes the current instantiation onto the stack of active 4634 /// instantiations. If the size of this stack exceeds the maximum 4635 /// number of recursive template instantiations, construction 4636 /// produces an error and evaluates true. 4637 /// 4638 /// Destruction of this object will pop the named instantiation off 4639 /// the stack. 4640 struct InstantiatingTemplate { 4641 /// \brief Note that we are instantiating a class template, 4642 /// function template, or a member thereof. 4643 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4644 Decl *Entity, 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 TemplateDecl *Template, 4651 const TemplateArgument *TemplateArgs, 4652 unsigned NumTemplateArgs, 4653 SourceRange InstantiationRange = SourceRange()); 4654 4655 /// \brief Note that we are instantiating a default argument in a 4656 /// template-id. 4657 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4658 FunctionTemplateDecl *FunctionTemplate, 4659 const TemplateArgument *TemplateArgs, 4660 unsigned NumTemplateArgs, 4661 ActiveTemplateInstantiation::InstantiationKind Kind, 4662 sema::TemplateDeductionInfo &DeductionInfo, 4663 SourceRange InstantiationRange = SourceRange()); 4664 4665 /// \brief Note that we are instantiating as part of template 4666 /// argument deduction for a class template partial 4667 /// specialization. 4668 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4669 ClassTemplatePartialSpecializationDecl *PartialSpec, 4670 const TemplateArgument *TemplateArgs, 4671 unsigned NumTemplateArgs, 4672 sema::TemplateDeductionInfo &DeductionInfo, 4673 SourceRange InstantiationRange = SourceRange()); 4674 4675 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4676 ParmVarDecl *Param, 4677 const TemplateArgument *TemplateArgs, 4678 unsigned NumTemplateArgs, 4679 SourceRange InstantiationRange = SourceRange()); 4680 4681 /// \brief Note that we are substituting prior template arguments into a 4682 /// non-type or template template parameter. 4683 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4684 NamedDecl *Template, 4685 NonTypeTemplateParmDecl *Param, 4686 const TemplateArgument *TemplateArgs, 4687 unsigned NumTemplateArgs, 4688 SourceRange InstantiationRange); 4689 4690 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4691 NamedDecl *Template, 4692 TemplateTemplateParmDecl *Param, 4693 const TemplateArgument *TemplateArgs, 4694 unsigned NumTemplateArgs, 4695 SourceRange InstantiationRange); 4696 4697 /// \brief Note that we are checking the default template argument 4698 /// against the template parameter for a given template-id. 4699 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4700 TemplateDecl *Template, 4701 NamedDecl *Param, 4702 const TemplateArgument *TemplateArgs, 4703 unsigned NumTemplateArgs, 4704 SourceRange InstantiationRange); 4705 4706 4707 /// \brief Note that we have finished instantiating this template. 4708 void Clear(); 4709 4710 ~InstantiatingTemplate() { Clear(); } 4711 4712 /// \brief Determines whether we have exceeded the maximum 4713 /// recursive template instantiations. 4714 operator bool() const { return Invalid; } 4715 4716 private: 4717 Sema &SemaRef; 4718 bool Invalid; 4719 bool SavedInNonInstantiationSFINAEContext; 4720 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4721 SourceRange InstantiationRange); 4722 4723 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4724 4725 InstantiatingTemplate& 4726 operator=(const InstantiatingTemplate&); // not implemented 4727 }; 4728 4729 void PrintInstantiationStack(); 4730 4731 /// \brief Determines whether we are currently in a context where 4732 /// template argument substitution failures are not considered 4733 /// errors. 4734 /// 4735 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4736 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4737 /// template-deduction context object, which can be used to capture 4738 /// diagnostics that will be suppressed. 4739 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4740 4741 /// \brief RAII class used to determine whether SFINAE has 4742 /// trapped any errors that occur during template argument 4743 /// deduction.` 4744 class SFINAETrap { 4745 Sema &SemaRef; 4746 unsigned PrevSFINAEErrors; 4747 bool PrevInNonInstantiationSFINAEContext; 4748 bool PrevAccessCheckingSFINAE; 4749 4750 public: 4751 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 4752 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 4753 PrevInNonInstantiationSFINAEContext( 4754 SemaRef.InNonInstantiationSFINAEContext), 4755 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 4756 { 4757 if (!SemaRef.isSFINAEContext()) 4758 SemaRef.InNonInstantiationSFINAEContext = true; 4759 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 4760 } 4761 4762 ~SFINAETrap() { 4763 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 4764 SemaRef.InNonInstantiationSFINAEContext 4765 = PrevInNonInstantiationSFINAEContext; 4766 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 4767 } 4768 4769 /// \brief Determine whether any SFINAE errors have been trapped. 4770 bool hasErrorOccurred() const { 4771 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 4772 } 4773 }; 4774 4775 /// \brief The current instantiation scope used to store local 4776 /// variables. 4777 LocalInstantiationScope *CurrentInstantiationScope; 4778 4779 /// \brief The number of typos corrected by CorrectTypo. 4780 unsigned TyposCorrected; 4781 4782 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 4783 UnqualifiedTyposCorrectedMap; 4784 4785 /// \brief A cache containing the results of typo correction for unqualified 4786 /// name lookup. 4787 /// 4788 /// The string is the string that we corrected to (which may be empty, if 4789 /// there was no correction), while the boolean will be true when the 4790 /// string represents a keyword. 4791 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 4792 4793 /// \brief Worker object for performing CFG-based warnings. 4794 sema::AnalysisBasedWarnings AnalysisWarnings; 4795 4796 /// \brief An entity for which implicit template instantiation is required. 4797 /// 4798 /// The source location associated with the declaration is the first place in 4799 /// the source code where the declaration was "used". It is not necessarily 4800 /// the point of instantiation (which will be either before or after the 4801 /// namespace-scope declaration that triggered this implicit instantiation), 4802 /// However, it is the location that diagnostics should generally refer to, 4803 /// because users will need to know what code triggered the instantiation. 4804 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 4805 4806 /// \brief The queue of implicit template instantiations that are required 4807 /// but have not yet been performed. 4808 std::deque<PendingImplicitInstantiation> PendingInstantiations; 4809 4810 /// \brief The queue of implicit template instantiations that are required 4811 /// and must be performed within the current local scope. 4812 /// 4813 /// This queue is only used for member functions of local classes in 4814 /// templates, which must be instantiated in the same scope as their 4815 /// enclosing function, so that they can reference function-local 4816 /// types, static variables, enumerators, etc. 4817 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 4818 4819 void PerformPendingInstantiations(bool LocalOnly = false); 4820 4821 TypeSourceInfo *SubstType(TypeSourceInfo *T, 4822 const MultiLevelTemplateArgumentList &TemplateArgs, 4823 SourceLocation Loc, DeclarationName Entity); 4824 4825 QualType SubstType(QualType T, 4826 const MultiLevelTemplateArgumentList &TemplateArgs, 4827 SourceLocation Loc, DeclarationName Entity); 4828 4829 TypeSourceInfo *SubstType(TypeLoc TL, 4830 const MultiLevelTemplateArgumentList &TemplateArgs, 4831 SourceLocation Loc, DeclarationName Entity); 4832 4833 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 4834 const MultiLevelTemplateArgumentList &TemplateArgs, 4835 SourceLocation Loc, 4836 DeclarationName Entity); 4837 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 4838 const MultiLevelTemplateArgumentList &TemplateArgs, 4839 int indexAdjustment, 4840 llvm::Optional<unsigned> NumExpansions); 4841 bool SubstParmTypes(SourceLocation Loc, 4842 ParmVarDecl **Params, unsigned NumParams, 4843 const MultiLevelTemplateArgumentList &TemplateArgs, 4844 SmallVectorImpl<QualType> &ParamTypes, 4845 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 4846 ExprResult SubstExpr(Expr *E, 4847 const MultiLevelTemplateArgumentList &TemplateArgs); 4848 4849 /// \brief Substitute the given template arguments into a list of 4850 /// expressions, expanding pack expansions if required. 4851 /// 4852 /// \param Exprs The list of expressions to substitute into. 4853 /// 4854 /// \param NumExprs The number of expressions in \p Exprs. 4855 /// 4856 /// \param IsCall Whether this is some form of call, in which case 4857 /// default arguments will be dropped. 4858 /// 4859 /// \param TemplateArgs The set of template arguments to substitute. 4860 /// 4861 /// \param Outputs Will receive all of the substituted arguments. 4862 /// 4863 /// \returns true if an error occurred, false otherwise. 4864 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 4865 const MultiLevelTemplateArgumentList &TemplateArgs, 4866 SmallVectorImpl<Expr *> &Outputs); 4867 4868 StmtResult SubstStmt(Stmt *S, 4869 const MultiLevelTemplateArgumentList &TemplateArgs); 4870 4871 Decl *SubstDecl(Decl *D, DeclContext *Owner, 4872 const MultiLevelTemplateArgumentList &TemplateArgs); 4873 4874 bool 4875 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 4876 CXXRecordDecl *Pattern, 4877 const MultiLevelTemplateArgumentList &TemplateArgs); 4878 4879 bool 4880 InstantiateClass(SourceLocation PointOfInstantiation, 4881 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 4882 const MultiLevelTemplateArgumentList &TemplateArgs, 4883 TemplateSpecializationKind TSK, 4884 bool Complain = true); 4885 4886 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 4887 const Decl *Pattern, Decl *Inst); 4888 4889 bool 4890 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 4891 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4892 TemplateSpecializationKind TSK, 4893 bool Complain = true); 4894 4895 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 4896 CXXRecordDecl *Instantiation, 4897 const MultiLevelTemplateArgumentList &TemplateArgs, 4898 TemplateSpecializationKind TSK); 4899 4900 void InstantiateClassTemplateSpecializationMembers( 4901 SourceLocation PointOfInstantiation, 4902 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4903 TemplateSpecializationKind TSK); 4904 4905 NestedNameSpecifierLoc 4906 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 4907 const MultiLevelTemplateArgumentList &TemplateArgs); 4908 4909 DeclarationNameInfo 4910 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 4911 const MultiLevelTemplateArgumentList &TemplateArgs); 4912 TemplateName 4913 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 4914 SourceLocation Loc, 4915 const MultiLevelTemplateArgumentList &TemplateArgs); 4916 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 4917 TemplateArgumentListInfo &Result, 4918 const MultiLevelTemplateArgumentList &TemplateArgs); 4919 4920 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 4921 FunctionDecl *Function, 4922 bool Recursive = false, 4923 bool DefinitionRequired = false); 4924 void InstantiateStaticDataMemberDefinition( 4925 SourceLocation PointOfInstantiation, 4926 VarDecl *Var, 4927 bool Recursive = false, 4928 bool DefinitionRequired = false); 4929 4930 void InstantiateMemInitializers(CXXConstructorDecl *New, 4931 const CXXConstructorDecl *Tmpl, 4932 const MultiLevelTemplateArgumentList &TemplateArgs); 4933 bool InstantiateInitializer(Expr *Init, 4934 const MultiLevelTemplateArgumentList &TemplateArgs, 4935 SourceLocation &LParenLoc, 4936 ASTOwningVector<Expr*> &NewArgs, 4937 SourceLocation &RParenLoc); 4938 4939 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 4940 const MultiLevelTemplateArgumentList &TemplateArgs); 4941 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 4942 const MultiLevelTemplateArgumentList &TemplateArgs); 4943 4944 // Objective-C declarations. 4945 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 4946 IdentifierInfo *ClassName, 4947 SourceLocation ClassLoc, 4948 IdentifierInfo *SuperName, 4949 SourceLocation SuperLoc, 4950 Decl * const *ProtoRefs, 4951 unsigned NumProtoRefs, 4952 const SourceLocation *ProtoLocs, 4953 SourceLocation EndProtoLoc, 4954 AttributeList *AttrList); 4955 4956 Decl *ActOnCompatiblityAlias( 4957 SourceLocation AtCompatibilityAliasLoc, 4958 IdentifierInfo *AliasName, SourceLocation AliasLocation, 4959 IdentifierInfo *ClassName, SourceLocation ClassLocation); 4960 4961 bool CheckForwardProtocolDeclarationForCircularDependency( 4962 IdentifierInfo *PName, 4963 SourceLocation &PLoc, SourceLocation PrevLoc, 4964 const ObjCList<ObjCProtocolDecl> &PList); 4965 4966 Decl *ActOnStartProtocolInterface( 4967 SourceLocation AtProtoInterfaceLoc, 4968 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 4969 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 4970 const SourceLocation *ProtoLocs, 4971 SourceLocation EndProtoLoc, 4972 AttributeList *AttrList); 4973 4974 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 4975 IdentifierInfo *ClassName, 4976 SourceLocation ClassLoc, 4977 IdentifierInfo *CategoryName, 4978 SourceLocation CategoryLoc, 4979 Decl * const *ProtoRefs, 4980 unsigned NumProtoRefs, 4981 const SourceLocation *ProtoLocs, 4982 SourceLocation EndProtoLoc); 4983 4984 Decl *ActOnStartClassImplementation( 4985 SourceLocation AtClassImplLoc, 4986 IdentifierInfo *ClassName, SourceLocation ClassLoc, 4987 IdentifierInfo *SuperClassname, 4988 SourceLocation SuperClassLoc); 4989 4990 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 4991 IdentifierInfo *ClassName, 4992 SourceLocation ClassLoc, 4993 IdentifierInfo *CatName, 4994 SourceLocation CatLoc); 4995 4996 Decl *ActOnForwardClassDeclaration(SourceLocation Loc, 4997 IdentifierInfo **IdentList, 4998 SourceLocation *IdentLocs, 4999 unsigned NumElts); 5000 5001 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 5002 const IdentifierLocPair *IdentList, 5003 unsigned NumElts, 5004 AttributeList *attrList); 5005 5006 void FindProtocolDeclaration(bool WarnOnDeclarations, 5007 const IdentifierLocPair *ProtocolId, 5008 unsigned NumProtocols, 5009 SmallVectorImpl<Decl *> &Protocols); 5010 5011 /// Ensure attributes are consistent with type. 5012 /// \param [in, out] Attributes The attributes to check; they will 5013 /// be modified to be consistent with \arg PropertyTy. 5014 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5015 SourceLocation Loc, 5016 unsigned &Attributes); 5017 5018 /// Process the specified property declaration and create decls for the 5019 /// setters and getters as needed. 5020 /// \param property The property declaration being processed 5021 /// \param DC The semantic container for the property 5022 /// \param redeclaredProperty Declaration for property if redeclared 5023 /// in class extension. 5024 /// \param lexicalDC Container for redeclaredProperty. 5025 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5026 ObjCContainerDecl *DC, 5027 ObjCPropertyDecl *redeclaredProperty = 0, 5028 ObjCContainerDecl *lexicalDC = 0); 5029 5030 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5031 ObjCPropertyDecl *SuperProperty, 5032 const IdentifierInfo *Name); 5033 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5034 5035 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5036 ObjCMethodDecl *MethodDecl, 5037 bool IsInstance); 5038 5039 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5040 5041 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5042 ObjCInterfaceDecl *ID); 5043 5044 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5045 ObjCProtocolDecl *PDecl); 5046 5047 void ActOnAtEnd(Scope *S, SourceRange AtEnd, Decl *classDecl, 5048 Decl **allMethods = 0, unsigned allNum = 0, 5049 Decl **allProperties = 0, unsigned pNum = 0, 5050 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5051 5052 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5053 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5054 Selector GetterSel, Selector SetterSel, 5055 Decl *ClassCategory, 5056 bool *OverridingProperty, 5057 tok::ObjCKeywordKind MethodImplKind, 5058 DeclContext *lexicalDC = 0); 5059 5060 Decl *ActOnPropertyImplDecl(Scope *S, 5061 SourceLocation AtLoc, 5062 SourceLocation PropertyLoc, 5063 bool ImplKind,Decl *ClassImplDecl, 5064 IdentifierInfo *PropertyId, 5065 IdentifierInfo *PropertyIvar, 5066 SourceLocation PropertyIvarLoc); 5067 5068 enum ObjCSpecialMethodKind { 5069 OSMK_None, 5070 OSMK_Alloc, 5071 OSMK_New, 5072 OSMK_Copy, 5073 OSMK_RetainingInit, 5074 OSMK_NonRetainingInit 5075 }; 5076 5077 struct ObjCArgInfo { 5078 IdentifierInfo *Name; 5079 SourceLocation NameLoc; 5080 // The Type is null if no type was specified, and the DeclSpec is invalid 5081 // in this case. 5082 ParsedType Type; 5083 ObjCDeclSpec DeclSpec; 5084 5085 /// ArgAttrs - Attribute list for this argument. 5086 AttributeList *ArgAttrs; 5087 }; 5088 5089 Decl *ActOnMethodDeclaration( 5090 Scope *S, 5091 SourceLocation BeginLoc, // location of the + or -. 5092 SourceLocation EndLoc, // location of the ; or {. 5093 tok::TokenKind MethodType, 5094 Decl *ClassDecl, ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5095 SourceLocation SelectorStartLoc, Selector Sel, 5096 // optional arguments. The number of types/arguments is obtained 5097 // from the Sel.getNumArgs(). 5098 ObjCArgInfo *ArgInfo, 5099 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5100 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5101 bool isVariadic, bool MethodDefinition); 5102 5103 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5104 // Will search "local" class/category implementations for a method decl. 5105 // Will also search in class's root looking for instance method. 5106 // Returns 0 if no method is found. 5107 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5108 ObjCInterfaceDecl *CDecl); 5109 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5110 ObjCInterfaceDecl *ClassDecl); 5111 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5112 const ObjCObjectPointerType *OPT, 5113 bool IsInstance); 5114 5115 bool inferObjCARCLifetime(ValueDecl *decl); 5116 5117 ExprResult 5118 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5119 Expr *BaseExpr, 5120 SourceLocation OpLoc, 5121 DeclarationName MemberName, 5122 SourceLocation MemberLoc, 5123 SourceLocation SuperLoc, QualType SuperType, 5124 bool Super); 5125 5126 ExprResult 5127 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5128 IdentifierInfo &propertyName, 5129 SourceLocation receiverNameLoc, 5130 SourceLocation propertyNameLoc); 5131 5132 ObjCMethodDecl *tryCaptureObjCSelf(); 5133 5134 /// \brief Describes the kind of message expression indicated by a message 5135 /// send that starts with an identifier. 5136 enum ObjCMessageKind { 5137 /// \brief The message is sent to 'super'. 5138 ObjCSuperMessage, 5139 /// \brief The message is an instance message. 5140 ObjCInstanceMessage, 5141 /// \brief The message is a class message, and the identifier is a type 5142 /// name. 5143 ObjCClassMessage 5144 }; 5145 5146 ObjCMessageKind getObjCMessageKind(Scope *S, 5147 IdentifierInfo *Name, 5148 SourceLocation NameLoc, 5149 bool IsSuper, 5150 bool HasTrailingDot, 5151 ParsedType &ReceiverType); 5152 5153 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5154 Selector Sel, 5155 SourceLocation LBracLoc, 5156 SourceLocation SelectorLoc, 5157 SourceLocation RBracLoc, 5158 MultiExprArg Args); 5159 5160 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5161 QualType ReceiverType, 5162 SourceLocation SuperLoc, 5163 Selector Sel, 5164 ObjCMethodDecl *Method, 5165 SourceLocation LBracLoc, 5166 SourceLocation SelectorLoc, 5167 SourceLocation RBracLoc, 5168 MultiExprArg Args); 5169 5170 ExprResult ActOnClassMessage(Scope *S, 5171 ParsedType Receiver, 5172 Selector Sel, 5173 SourceLocation LBracLoc, 5174 SourceLocation SelectorLoc, 5175 SourceLocation RBracLoc, 5176 MultiExprArg Args); 5177 5178 ExprResult BuildInstanceMessage(Expr *Receiver, 5179 QualType ReceiverType, 5180 SourceLocation SuperLoc, 5181 Selector Sel, 5182 ObjCMethodDecl *Method, 5183 SourceLocation LBracLoc, 5184 SourceLocation SelectorLoc, 5185 SourceLocation RBracLoc, 5186 MultiExprArg Args); 5187 5188 ExprResult ActOnInstanceMessage(Scope *S, 5189 Expr *Receiver, 5190 Selector Sel, 5191 SourceLocation LBracLoc, 5192 SourceLocation SelectorLoc, 5193 SourceLocation RBracLoc, 5194 MultiExprArg Args); 5195 5196 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5197 ObjCBridgeCastKind Kind, 5198 SourceLocation BridgeKeywordLoc, 5199 TypeSourceInfo *TSInfo, 5200 Expr *SubExpr); 5201 5202 ExprResult ActOnObjCBridgedCast(Scope *S, 5203 SourceLocation LParenLoc, 5204 ObjCBridgeCastKind Kind, 5205 SourceLocation BridgeKeywordLoc, 5206 ParsedType Type, 5207 SourceLocation RParenLoc, 5208 Expr *SubExpr); 5209 5210 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5211 5212 /// \brief Check whether the given new method is a valid override of the 5213 /// given overridden method, and set any properties that should be inherited. 5214 /// 5215 /// \returns True if an error occurred. 5216 bool CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5217 const ObjCMethodDecl *Overridden, 5218 bool IsImplementation); 5219 5220 /// \brief Check whether the given method overrides any methods in its class, 5221 /// calling \c CheckObjCMethodOverride for each overridden method. 5222 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5223 5224 enum PragmaOptionsAlignKind { 5225 POAK_Native, // #pragma options align=native 5226 POAK_Natural, // #pragma options align=natural 5227 POAK_Packed, // #pragma options align=packed 5228 POAK_Power, // #pragma options align=power 5229 POAK_Mac68k, // #pragma options align=mac68k 5230 POAK_Reset // #pragma options align=reset 5231 }; 5232 5233 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5234 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5235 SourceLocation PragmaLoc, 5236 SourceLocation KindLoc); 5237 5238 enum PragmaPackKind { 5239 PPK_Default, // #pragma pack([n]) 5240 PPK_Show, // #pragma pack(show), only supported by MSVC. 5241 PPK_Push, // #pragma pack(push, [identifier], [n]) 5242 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5243 }; 5244 5245 enum PragmaMSStructKind { 5246 PMSST_OFF, // #pragms ms_struct off 5247 PMSST_ON // #pragms ms_struct on 5248 }; 5249 5250 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5251 void ActOnPragmaPack(PragmaPackKind Kind, 5252 IdentifierInfo *Name, 5253 Expr *Alignment, 5254 SourceLocation PragmaLoc, 5255 SourceLocation LParenLoc, 5256 SourceLocation RParenLoc); 5257 5258 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5259 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5260 5261 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5262 void ActOnPragmaUnused(const Token &Identifier, 5263 Scope *curScope, 5264 SourceLocation PragmaLoc); 5265 5266 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5267 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 5268 SourceLocation PragmaLoc); 5269 5270 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II); 5271 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5272 5273 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5274 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5275 SourceLocation PragmaLoc, 5276 SourceLocation WeakNameLoc); 5277 5278 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5279 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5280 IdentifierInfo* AliasName, 5281 SourceLocation PragmaLoc, 5282 SourceLocation WeakNameLoc, 5283 SourceLocation AliasNameLoc); 5284 5285 /// ActOnPragmaFPContract - Called on well formed 5286 /// #pragma {STDC,OPENCL} FP_CONTRACT 5287 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5288 5289 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5290 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5291 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5292 5293 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5294 void AddMsStructLayoutForRecord(RecordDecl *RD); 5295 5296 /// FreePackedContext - Deallocate and null out PackContext. 5297 void FreePackedContext(); 5298 5299 /// PushNamespaceVisibilityAttr - Note that we've entered a 5300 /// namespace with a visibility attribute. 5301 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 5302 5303 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5304 /// add an appropriate visibility attribute. 5305 void AddPushedVisibilityAttribute(Decl *RD); 5306 5307 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5308 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5309 void PopPragmaVisibility(); 5310 5311 /// FreeVisContext - Deallocate and null out VisContext. 5312 void FreeVisContext(); 5313 5314 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5315 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, Expr *E); 5316 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, TypeSourceInfo *T); 5317 5318 /// CastCategory - Get the correct forwarded implicit cast result category 5319 /// from the inner expression. 5320 ExprValueKind CastCategory(Expr *E); 5321 5322 /// \brief The kind of conversion being performed. 5323 enum CheckedConversionKind { 5324 /// \brief An implicit conversion. 5325 CCK_ImplicitConversion, 5326 /// \brief A C-style cast. 5327 CCK_CStyleCast, 5328 /// \brief A functional-style cast. 5329 CCK_FunctionalCast, 5330 /// \brief A cast other than a C-style cast. 5331 CCK_OtherCast 5332 }; 5333 5334 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5335 /// cast. If there is already an implicit cast, merge into the existing one. 5336 /// If isLvalue, the result of the cast is an lvalue. 5337 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5338 ExprValueKind VK = VK_RValue, 5339 const CXXCastPath *BasePath = 0, 5340 CheckedConversionKind CCK 5341 = CCK_ImplicitConversion); 5342 5343 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5344 /// to the conversion from scalar type ScalarTy to the Boolean type. 5345 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5346 5347 /// IgnoredValueConversions - Given that an expression's result is 5348 /// syntactically ignored, perform any conversions that are 5349 /// required. 5350 ExprResult IgnoredValueConversions(Expr *E); 5351 5352 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5353 // functions and arrays to their respective pointers (C99 6.3.2.1). 5354 ExprResult UsualUnaryConversions(Expr *E); 5355 5356 // DefaultFunctionArrayConversion - converts functions and arrays 5357 // to their respective pointers (C99 6.3.2.1). 5358 ExprResult DefaultFunctionArrayConversion(Expr *E); 5359 5360 // DefaultFunctionArrayLvalueConversion - converts functions and 5361 // arrays to their respective pointers and performs the 5362 // lvalue-to-rvalue conversion. 5363 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5364 5365 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5366 // the operand. This is DefaultFunctionArrayLvalueConversion, 5367 // except that it assumes the operand isn't of function or array 5368 // type. 5369 ExprResult DefaultLvalueConversion(Expr *E); 5370 5371 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5372 // do not have a prototype. Integer promotions are performed on each 5373 // argument, and arguments that have type float are promoted to double. 5374 ExprResult DefaultArgumentPromotion(Expr *E); 5375 5376 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5377 enum VariadicCallType { 5378 VariadicFunction, 5379 VariadicBlock, 5380 VariadicMethod, 5381 VariadicConstructor, 5382 VariadicDoesNotApply 5383 }; 5384 5385 /// GatherArgumentsForCall - Collector argument expressions for various 5386 /// form of call prototypes. 5387 bool GatherArgumentsForCall(SourceLocation CallLoc, 5388 FunctionDecl *FDecl, 5389 const FunctionProtoType *Proto, 5390 unsigned FirstProtoArg, 5391 Expr **Args, unsigned NumArgs, 5392 SmallVector<Expr *, 8> &AllArgs, 5393 VariadicCallType CallType = VariadicDoesNotApply); 5394 5395 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5396 // will warn if the resulting type is not a POD type. 5397 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5398 FunctionDecl *FDecl); 5399 5400 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5401 // operands and then handles various conversions that are common to binary 5402 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5403 // routine returns the first non-arithmetic type found. The client is 5404 // responsible for emitting appropriate error diagnostics. 5405 QualType UsualArithmeticConversions(ExprResult &lExpr, ExprResult &rExpr, 5406 bool isCompAssign = false); 5407 5408 /// AssignConvertType - All of the 'assignment' semantic checks return this 5409 /// enum to indicate whether the assignment was allowed. These checks are 5410 /// done for simple assignments, as well as initialization, return from 5411 /// function, argument passing, etc. The query is phrased in terms of a 5412 /// source and destination type. 5413 enum AssignConvertType { 5414 /// Compatible - the types are compatible according to the standard. 5415 Compatible, 5416 5417 /// PointerToInt - The assignment converts a pointer to an int, which we 5418 /// accept as an extension. 5419 PointerToInt, 5420 5421 /// IntToPointer - The assignment converts an int to a pointer, which we 5422 /// accept as an extension. 5423 IntToPointer, 5424 5425 /// FunctionVoidPointer - The assignment is between a function pointer and 5426 /// void*, which the standard doesn't allow, but we accept as an extension. 5427 FunctionVoidPointer, 5428 5429 /// IncompatiblePointer - The assignment is between two pointers types that 5430 /// are not compatible, but we accept them as an extension. 5431 IncompatiblePointer, 5432 5433 /// IncompatiblePointer - The assignment is between two pointers types which 5434 /// point to integers which have a different sign, but are otherwise identical. 5435 /// This is a subset of the above, but broken out because it's by far the most 5436 /// common case of incompatible pointers. 5437 IncompatiblePointerSign, 5438 5439 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5440 /// c/v/r qualifiers, which we accept as an extension. 5441 CompatiblePointerDiscardsQualifiers, 5442 5443 /// IncompatiblePointerDiscardsQualifiers - The assignment 5444 /// discards qualifiers that we don't permit to be discarded, 5445 /// like address spaces. 5446 IncompatiblePointerDiscardsQualifiers, 5447 5448 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5449 /// nested pointer types, and the qualifiers other than the first two 5450 /// levels differ e.g. char ** -> const char **, but we accept them as an 5451 /// extension. 5452 IncompatibleNestedPointerQualifiers, 5453 5454 /// IncompatibleVectors - The assignment is between two vector types that 5455 /// have the same size, which we accept as an extension. 5456 IncompatibleVectors, 5457 5458 /// IntToBlockPointer - The assignment converts an int to a block 5459 /// pointer. We disallow this. 5460 IntToBlockPointer, 5461 5462 /// IncompatibleBlockPointer - The assignment is between two block 5463 /// pointers types that are not compatible. 5464 IncompatibleBlockPointer, 5465 5466 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5467 /// id type and something else (that is incompatible with it). For example, 5468 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5469 IncompatibleObjCQualifiedId, 5470 5471 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 5472 /// object with __weak qualifier. 5473 IncompatibleObjCWeakRef, 5474 5475 /// Incompatible - We reject this conversion outright, it is invalid to 5476 /// represent it in the AST. 5477 Incompatible 5478 }; 5479 5480 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5481 /// assignment conversion type specified by ConvTy. This returns true if the 5482 /// conversion was invalid or false if the conversion was accepted. 5483 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5484 SourceLocation Loc, 5485 QualType DstType, QualType SrcType, 5486 Expr *SrcExpr, AssignmentAction Action, 5487 bool *Complained = 0); 5488 5489 /// CheckAssignmentConstraints - Perform type checking for assignment, 5490 /// argument passing, variable initialization, and function return values. 5491 /// C99 6.5.16. 5492 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5493 QualType lhs, QualType rhs); 5494 5495 /// Check assignment constraints and prepare for a conversion of the 5496 /// RHS to the LHS type. 5497 AssignConvertType CheckAssignmentConstraints(QualType lhs, ExprResult &rhs, 5498 CastKind &Kind); 5499 5500 // CheckSingleAssignmentConstraints - Currently used by 5501 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5502 // this routine performs the default function/array converions. 5503 AssignConvertType CheckSingleAssignmentConstraints(QualType lhs, 5504 ExprResult &rExprRes); 5505 5506 // \brief If the lhs type is a transparent union, check whether we 5507 // can initialize the transparent union with the given expression. 5508 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType lhs, 5509 ExprResult &rExpr); 5510 5511 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5512 5513 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5514 5515 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5516 AssignmentAction Action, 5517 bool AllowExplicit = false); 5518 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5519 AssignmentAction Action, 5520 bool AllowExplicit, 5521 ImplicitConversionSequence& ICS); 5522 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5523 const ImplicitConversionSequence& ICS, 5524 AssignmentAction Action, 5525 CheckedConversionKind CCK 5526 = CCK_ImplicitConversion); 5527 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5528 const StandardConversionSequence& SCS, 5529 AssignmentAction Action, 5530 CheckedConversionKind CCK); 5531 5532 /// the following "Check" methods will return a valid/converted QualType 5533 /// or a null QualType (indicating an error diagnostic was issued). 5534 5535 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5536 QualType InvalidOperands(SourceLocation l, ExprResult &lex, ExprResult &rex); 5537 QualType CheckPointerToMemberOperands( // C++ 5.5 5538 ExprResult &lex, ExprResult &rex, ExprValueKind &VK, 5539 SourceLocation OpLoc, bool isIndirect); 5540 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5541 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign, 5542 bool isDivide); 5543 QualType CheckRemainderOperands( // C99 6.5.5 5544 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 5545 QualType CheckAdditionOperands( // C99 6.5.6 5546 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 5547 QualType CheckSubtractionOperands( // C99 6.5.6 5548 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 5549 QualType CheckShiftOperands( // C99 6.5.7 5550 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 5551 bool isCompAssign = false); 5552 QualType CheckCompareOperands( // C99 6.5.8/9 5553 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 5554 bool isRelational); 5555 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 5556 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 5557 QualType CheckLogicalOperands( // C99 6.5.[13,14] 5558 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc); 5559 // CheckAssignmentOperands is used for both simple and compound assignment. 5560 // For simple assignment, pass both expressions and a null converted type. 5561 // For compound assignment, pass both expressions and the converted type. 5562 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 5563 Expr *lex, ExprResult &rex, SourceLocation OpLoc, QualType convertedType); 5564 5565 void ConvertPropertyForLValue(ExprResult &LHS, ExprResult &RHS, QualType& LHSTy); 5566 ExprResult ConvertPropertyForRValue(Expr *E); 5567 5568 QualType CheckConditionalOperands( // C99 6.5.15 5569 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5570 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5571 QualType CXXCheckConditionalOperands( // C++ 5.16 5572 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5573 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5574 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 5575 bool *NonStandardCompositeType = 0); 5576 QualType FindCompositePointerType(SourceLocation Loc, ExprResult &E1, ExprResult &E2, 5577 bool *NonStandardCompositeType = 0) { 5578 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 5579 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, NonStandardCompositeType); 5580 E1 = Owned(E1Tmp); 5581 E2 = Owned(E2Tmp); 5582 return Composite; 5583 } 5584 5585 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5586 SourceLocation questionLoc); 5587 5588 bool DiagnoseConditionalForNull(Expr *LHS, Expr *RHS, 5589 SourceLocation QuestionLoc); 5590 5591 /// type checking for vector binary operators. 5592 QualType CheckVectorOperands(ExprResult &lex, ExprResult &rex, 5593 SourceLocation Loc, bool isCompAssign); 5594 QualType CheckVectorCompareOperands(ExprResult &lex, ExprResult &rx, 5595 SourceLocation l, bool isRel); 5596 5597 /// type checking declaration initializers (C99 6.7.8) 5598 bool CheckInitList(const InitializedEntity &Entity, 5599 InitListExpr *&InitList, QualType &DeclType); 5600 bool CheckForConstantInitializer(Expr *e, QualType t); 5601 5602 // type checking C++ declaration initializers (C++ [dcl.init]). 5603 5604 /// ReferenceCompareResult - Expresses the result of comparing two 5605 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5606 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5607 enum ReferenceCompareResult { 5608 /// Ref_Incompatible - The two types are incompatible, so direct 5609 /// reference binding is not possible. 5610 Ref_Incompatible = 0, 5611 /// Ref_Related - The two types are reference-related, which means 5612 /// that their unqualified forms (T1 and T2) are either the same 5613 /// or T1 is a base class of T2. 5614 Ref_Related, 5615 /// Ref_Compatible_With_Added_Qualification - The two types are 5616 /// reference-compatible with added qualification, meaning that 5617 /// they are reference-compatible and the qualifiers on T1 (cv1) 5618 /// are greater than the qualifiers on T2 (cv2). 5619 Ref_Compatible_With_Added_Qualification, 5620 /// Ref_Compatible - The two types are reference-compatible and 5621 /// have equivalent qualifiers (cv1 == cv2). 5622 Ref_Compatible 5623 }; 5624 5625 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 5626 QualType T1, QualType T2, 5627 bool &DerivedToBase, 5628 bool &ObjCConversion, 5629 bool &ObjCLifetimeConversion); 5630 5631 /// CheckCastTypes - Check type constraints for casting between types under 5632 /// C semantics, or forward to CXXCheckCStyleCast in C++. 5633 ExprResult CheckCastTypes(SourceLocation CastStartLoc, SourceRange TyRange, 5634 QualType CastTy, Expr *CastExpr, CastKind &Kind, 5635 ExprValueKind &VK, CXXCastPath &BasePath, 5636 bool FunctionalStyle = false); 5637 5638 ExprResult checkUnknownAnyCast(SourceRange TyRange, QualType castType, 5639 Expr *castExpr, CastKind &castKind, 5640 ExprValueKind &valueKind, CXXCastPath &BasePath); 5641 5642 // CheckVectorCast - check type constraints for vectors. 5643 // Since vectors are an extension, there are no C standard reference for this. 5644 // We allow casting between vectors and integer datatypes of the same size. 5645 // returns true if the cast is invalid 5646 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 5647 CastKind &Kind); 5648 5649 // CheckExtVectorCast - check type constraints for extended vectors. 5650 // Since vectors are an extension, there are no C standard reference for this. 5651 // We allow casting between vectors and integer datatypes of the same size, 5652 // or vectors and the element type of that vector. 5653 // returns the cast expr 5654 ExprResult CheckExtVectorCast(SourceRange R, QualType VectorTy, Expr *CastExpr, 5655 CastKind &Kind); 5656 5657 /// CXXCheckCStyleCast - Check constraints of a C-style or function-style 5658 /// cast under C++ semantics. 5659 ExprResult CXXCheckCStyleCast(SourceRange R, QualType CastTy, ExprValueKind &VK, 5660 Expr *CastExpr, CastKind &Kind, 5661 CXXCastPath &BasePath, bool FunctionalStyle); 5662 5663 /// \brief Checks for valid expressions which can be cast to an ObjC 5664 /// pointer without needing a bridge cast. 5665 bool ValidObjCARCNoBridgeCastExpr(Expr *&Exp, QualType castType); 5666 5667 /// \brief Checks for invalid conversions and casts between 5668 /// retainable pointers and other pointer kinds. 5669 void CheckObjCARCConversion(SourceRange castRange, QualType castType, 5670 Expr *&op, CheckedConversionKind CCK); 5671 5672 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 5673 QualType ExprType); 5674 5675 /// checkRetainCycles - Check whether an Objective-C message send 5676 /// might create an obvious retain cycle. 5677 void checkRetainCycles(ObjCMessageExpr *msg); 5678 void checkRetainCycles(Expr *receiver, Expr *argument); 5679 5680 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 5681 /// to weak/__unsafe_unretained type. 5682 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 5683 5684 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 5685 /// to weak/__unsafe_unretained expression. 5686 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 5687 5688 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 5689 /// \param Method - May be null. 5690 /// \param [out] ReturnType - The return type of the send. 5691 /// \return true iff there were any incompatible types. 5692 bool CheckMessageArgumentTypes(QualType ReceiverType, 5693 Expr **Args, unsigned NumArgs, Selector Sel, 5694 ObjCMethodDecl *Method, bool isClassMessage, 5695 bool isSuperMessage, 5696 SourceLocation lbrac, SourceLocation rbrac, 5697 QualType &ReturnType, ExprValueKind &VK); 5698 5699 /// \brief Determine the result of a message send expression based on 5700 /// the type of the receiver, the method expected to receive the message, 5701 /// and the form of the message send. 5702 QualType getMessageSendResultType(QualType ReceiverType, 5703 ObjCMethodDecl *Method, 5704 bool isClassMessage, bool isSuperMessage); 5705 5706 /// \brief If the given expression involves a message send to a method 5707 /// with a related result type, emit a note describing what happened. 5708 void EmitRelatedResultTypeNote(const Expr *E); 5709 5710 /// CheckBooleanCondition - Diagnose problems involving the use of 5711 /// the given expression as a boolean condition (e.g. in an if 5712 /// statement). Also performs the standard function and array 5713 /// decays, possibly changing the input variable. 5714 /// 5715 /// \param Loc - A location associated with the condition, e.g. the 5716 /// 'if' keyword. 5717 /// \return true iff there were any errors 5718 ExprResult CheckBooleanCondition(Expr *CondExpr, SourceLocation Loc); 5719 5720 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 5721 Expr *SubExpr); 5722 5723 /// DiagnoseAssignmentAsCondition - Given that an expression is 5724 /// being used as a boolean condition, warn if it's an assignment. 5725 void DiagnoseAssignmentAsCondition(Expr *E); 5726 5727 /// \brief Redundant parentheses over an equality comparison can indicate 5728 /// that the user intended an assignment used as condition. 5729 void DiagnoseEqualityWithExtraParens(ParenExpr *parenE); 5730 5731 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 5732 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 5733 5734 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 5735 /// the specified width and sign. If an overflow occurs, detect it and emit 5736 /// the specified diagnostic. 5737 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 5738 unsigned NewWidth, bool NewSign, 5739 SourceLocation Loc, unsigned DiagID); 5740 5741 /// Checks that the Objective-C declaration is declared in the global scope. 5742 /// Emits an error and marks the declaration as invalid if it's not declared 5743 /// in the global scope. 5744 bool CheckObjCDeclScope(Decl *D); 5745 5746 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 5747 /// and reports the appropriate diagnostics. Returns false on success. 5748 /// Can optionally return the value of the expression. 5749 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 5750 5751 /// VerifyBitField - verifies that a bit field expression is an ICE and has 5752 /// the correct width, and that the field type is valid. 5753 /// Returns false on success. 5754 /// Can optionally return whether the bit-field is of width 0 5755 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 5756 QualType FieldTy, const Expr *BitWidth, 5757 bool *ZeroWidth = 0); 5758 5759 /// \name Code completion 5760 //@{ 5761 /// \brief Describes the context in which code completion occurs. 5762 enum ParserCompletionContext { 5763 /// \brief Code completion occurs at top-level or namespace context. 5764 PCC_Namespace, 5765 /// \brief Code completion occurs within a class, struct, or union. 5766 PCC_Class, 5767 /// \brief Code completion occurs within an Objective-C interface, protocol, 5768 /// or category. 5769 PCC_ObjCInterface, 5770 /// \brief Code completion occurs within an Objective-C implementation or 5771 /// category implementation 5772 PCC_ObjCImplementation, 5773 /// \brief Code completion occurs within the list of instance variables 5774 /// in an Objective-C interface, protocol, category, or implementation. 5775 PCC_ObjCInstanceVariableList, 5776 /// \brief Code completion occurs following one or more template 5777 /// headers. 5778 PCC_Template, 5779 /// \brief Code completion occurs following one or more template 5780 /// headers within a class. 5781 PCC_MemberTemplate, 5782 /// \brief Code completion occurs within an expression. 5783 PCC_Expression, 5784 /// \brief Code completion occurs within a statement, which may 5785 /// also be an expression or a declaration. 5786 PCC_Statement, 5787 /// \brief Code completion occurs at the beginning of the 5788 /// initialization statement (or expression) in a for loop. 5789 PCC_ForInit, 5790 /// \brief Code completion occurs within the condition of an if, 5791 /// while, switch, or for statement. 5792 PCC_Condition, 5793 /// \brief Code completion occurs within the body of a function on a 5794 /// recovery path, where we do not have a specific handle on our position 5795 /// in the grammar. 5796 PCC_RecoveryInFunction, 5797 /// \brief Code completion occurs where only a type is permitted. 5798 PCC_Type, 5799 /// \brief Code completion occurs in a parenthesized expression, which 5800 /// might also be a type cast. 5801 PCC_ParenthesizedExpression, 5802 /// \brief Code completion occurs within a sequence of declaration 5803 /// specifiers within a function, method, or block. 5804 PCC_LocalDeclarationSpecifiers 5805 }; 5806 5807 void CodeCompleteOrdinaryName(Scope *S, 5808 ParserCompletionContext CompletionContext); 5809 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 5810 bool AllowNonIdentifiers, 5811 bool AllowNestedNameSpecifiers); 5812 5813 struct CodeCompleteExpressionData; 5814 void CodeCompleteExpression(Scope *S, 5815 const CodeCompleteExpressionData &Data); 5816 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 5817 SourceLocation OpLoc, 5818 bool IsArrow); 5819 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 5820 void CodeCompleteTag(Scope *S, unsigned TagSpec); 5821 void CodeCompleteTypeQualifiers(DeclSpec &DS); 5822 void CodeCompleteCase(Scope *S); 5823 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 5824 void CodeCompleteInitializer(Scope *S, Decl *D); 5825 void CodeCompleteReturn(Scope *S); 5826 void CodeCompleteAfterIf(Scope *S); 5827 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 5828 5829 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 5830 bool EnteringContext); 5831 void CodeCompleteUsing(Scope *S); 5832 void CodeCompleteUsingDirective(Scope *S); 5833 void CodeCompleteNamespaceDecl(Scope *S); 5834 void CodeCompleteNamespaceAliasDecl(Scope *S); 5835 void CodeCompleteOperatorName(Scope *S); 5836 void CodeCompleteConstructorInitializer(Decl *Constructor, 5837 CXXCtorInitializer** Initializers, 5838 unsigned NumInitializers); 5839 5840 void CodeCompleteObjCAtDirective(Scope *S, Decl *ObjCImpDecl, 5841 bool InInterface); 5842 void CodeCompleteObjCAtVisibility(Scope *S); 5843 void CodeCompleteObjCAtStatement(Scope *S); 5844 void CodeCompleteObjCAtExpression(Scope *S); 5845 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 5846 void CodeCompleteObjCPropertyGetter(Scope *S, Decl *ClassDecl); 5847 void CodeCompleteObjCPropertySetter(Scope *S, Decl *ClassDecl); 5848 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 5849 bool IsParameter); 5850 void CodeCompleteObjCMessageReceiver(Scope *S); 5851 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 5852 IdentifierInfo **SelIdents, 5853 unsigned NumSelIdents, 5854 bool AtArgumentExpression); 5855 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 5856 IdentifierInfo **SelIdents, 5857 unsigned NumSelIdents, 5858 bool AtArgumentExpression, 5859 bool IsSuper = false); 5860 void CodeCompleteObjCInstanceMessage(Scope *S, ExprTy *Receiver, 5861 IdentifierInfo **SelIdents, 5862 unsigned NumSelIdents, 5863 bool AtArgumentExpression, 5864 ObjCInterfaceDecl *Super = 0); 5865 void CodeCompleteObjCForCollection(Scope *S, 5866 DeclGroupPtrTy IterationVar); 5867 void CodeCompleteObjCSelector(Scope *S, 5868 IdentifierInfo **SelIdents, 5869 unsigned NumSelIdents); 5870 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 5871 unsigned NumProtocols); 5872 void CodeCompleteObjCProtocolDecl(Scope *S); 5873 void CodeCompleteObjCInterfaceDecl(Scope *S); 5874 void CodeCompleteObjCSuperclass(Scope *S, 5875 IdentifierInfo *ClassName, 5876 SourceLocation ClassNameLoc); 5877 void CodeCompleteObjCImplementationDecl(Scope *S); 5878 void CodeCompleteObjCInterfaceCategory(Scope *S, 5879 IdentifierInfo *ClassName, 5880 SourceLocation ClassNameLoc); 5881 void CodeCompleteObjCImplementationCategory(Scope *S, 5882 IdentifierInfo *ClassName, 5883 SourceLocation ClassNameLoc); 5884 void CodeCompleteObjCPropertyDefinition(Scope *S, Decl *ObjCImpDecl); 5885 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 5886 IdentifierInfo *PropertyName, 5887 Decl *ObjCImpDecl); 5888 void CodeCompleteObjCMethodDecl(Scope *S, 5889 bool IsInstanceMethod, 5890 ParsedType ReturnType, 5891 Decl *IDecl); 5892 void CodeCompleteObjCMethodDeclSelector(Scope *S, 5893 bool IsInstanceMethod, 5894 bool AtParameterName, 5895 ParsedType ReturnType, 5896 IdentifierInfo **SelIdents, 5897 unsigned NumSelIdents); 5898 void CodeCompletePreprocessorDirective(bool InConditional); 5899 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 5900 void CodeCompletePreprocessorMacroName(bool IsDefinition); 5901 void CodeCompletePreprocessorExpression(); 5902 void CodeCompletePreprocessorMacroArgument(Scope *S, 5903 IdentifierInfo *Macro, 5904 MacroInfo *MacroInfo, 5905 unsigned Argument); 5906 void CodeCompleteNaturalLanguage(); 5907 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 5908 SmallVectorImpl<CodeCompletionResult> &Results); 5909 //@} 5910 5911 //===--------------------------------------------------------------------===// 5912 // Extra semantic analysis beyond the C type system 5913 5914public: 5915 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 5916 unsigned ByteNo) const; 5917 5918private: 5919 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr, 5920 bool isSubscript=false, bool AllowOnePastEnd=true); 5921 void CheckArrayAccess(const Expr *E); 5922 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 5923 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 5924 5925 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 5926 bool CheckObjCString(Expr *Arg); 5927 5928 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5929 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5930 5931 bool SemaBuiltinVAStart(CallExpr *TheCall); 5932 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 5933 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 5934 5935public: 5936 // Used by C++ template instantiation. 5937 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 5938 5939private: 5940 bool SemaBuiltinPrefetch(CallExpr *TheCall); 5941 bool SemaBuiltinObjectSize(CallExpr *TheCall); 5942 bool SemaBuiltinLongjmp(CallExpr *TheCall); 5943 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 5944 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 5945 llvm::APSInt &Result); 5946 5947 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 5948 bool HasVAListArg, unsigned format_idx, 5949 unsigned firstDataArg, bool isPrintf); 5950 5951 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 5952 const CallExpr *TheCall, bool HasVAListArg, 5953 unsigned format_idx, unsigned firstDataArg, 5954 bool isPrintf); 5955 5956 void CheckNonNullArguments(const NonNullAttr *NonNull, 5957 const Expr * const *ExprArgs, 5958 SourceLocation CallSiteLoc); 5959 5960 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 5961 unsigned format_idx, unsigned firstDataArg, 5962 bool isPrintf); 5963 5964 /// \brief Enumeration used to describe which of the memory setting or copying 5965 /// functions is being checked by \c CheckMemaccessArguments(). 5966 enum CheckedMemoryFunction { 5967 CMF_Memset, 5968 CMF_Memcpy, 5969 CMF_Memmove, 5970 CMF_Memcmp 5971 }; 5972 5973 void CheckMemaccessArguments(const CallExpr *Call, CheckedMemoryFunction CMF, 5974 IdentifierInfo *FnName); 5975 5976 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 5977 SourceLocation ReturnLoc); 5978 void CheckFloatComparison(SourceLocation loc, Expr* lex, Expr* rex); 5979 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 5980 5981 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 5982 Expr *Init); 5983 5984 /// \brief The parser's current scope. 5985 /// 5986 /// The parser maintains this state here. 5987 Scope *CurScope; 5988 5989protected: 5990 friend class Parser; 5991 friend class InitializationSequence; 5992 friend class ASTReader; 5993 friend class ASTWriter; 5994 5995public: 5996 /// \brief Retrieve the parser's current scope. 5997 /// 5998 /// This routine must only be used when it is certain that semantic analysis 5999 /// and the parser are in precisely the same context, which is not the case 6000 /// when, e.g., we are performing any kind of template instantiation. 6001 /// Therefore, the only safe places to use this scope are in the parser 6002 /// itself and in routines directly invoked from the parser and *never* from 6003 /// template substitution or instantiation. 6004 Scope *getCurScope() const { return CurScope; } 6005}; 6006 6007/// \brief RAII object that enters a new expression evaluation context. 6008class EnterExpressionEvaluationContext { 6009 Sema &Actions; 6010 6011public: 6012 EnterExpressionEvaluationContext(Sema &Actions, 6013 Sema::ExpressionEvaluationContext NewContext) 6014 : Actions(Actions) { 6015 Actions.PushExpressionEvaluationContext(NewContext); 6016 } 6017 6018 ~EnterExpressionEvaluationContext() { 6019 Actions.PopExpressionEvaluationContext(); 6020 } 6021}; 6022 6023} // end namespace clang 6024 6025#endif 6026