Sema.h revision 2246368b1061ef48e00bfc95d519d4393dff9926
1//===--- Sema.h - Semantic Analysis & AST Building --------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Sema class, which performs semantic analysis and 11// builds ASTs. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef LLVM_CLANG_SEMA_SEMA_H 16#define LLVM_CLANG_SEMA_SEMA_H 17 18#include "clang/Sema/Ownership.h" 19#include "clang/Sema/AnalysisBasedWarnings.h" 20#include "clang/Sema/IdentifierResolver.h" 21#include "clang/Sema/ObjCMethodList.h" 22#include "clang/Sema/DeclSpec.h" 23#include "clang/Sema/ExternalSemaSource.h" 24#include "clang/Sema/LocInfoType.h" 25#include "clang/Sema/MultiInitializer.h" 26#include "clang/Sema/TypoCorrection.h" 27#include "clang/Sema/Weak.h" 28#include "clang/AST/Expr.h" 29#include "clang/AST/DeclarationName.h" 30#include "clang/AST/ExternalASTSource.h" 31#include "clang/AST/TypeLoc.h" 32#include "clang/Basic/Specifiers.h" 33#include "clang/Basic/TemplateKinds.h" 34#include "clang/Basic/TypeTraits.h" 35#include "clang/Basic/ExpressionTraits.h" 36#include "llvm/ADT/ArrayRef.h" 37#include "llvm/ADT/OwningPtr.h" 38#include "llvm/ADT/SmallPtrSet.h" 39#include "llvm/ADT/SmallVector.h" 40#include <deque> 41#include <string> 42 43namespace llvm { 44 class APSInt; 45 template <typename ValueT> struct DenseMapInfo; 46 template <typename ValueT, typename ValueInfoT> class DenseSet; 47} 48 49namespace clang { 50 class ADLResult; 51 class ASTConsumer; 52 class ASTContext; 53 class ASTMutationListener; 54 class ASTReader; 55 class ASTWriter; 56 class ArrayType; 57 class AttributeList; 58 class BlockDecl; 59 class CXXBasePath; 60 class CXXBasePaths; 61 typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 62 class CXXConstructorDecl; 63 class CXXConversionDecl; 64 class CXXDestructorDecl; 65 class CXXFieldCollector; 66 class CXXMemberCallExpr; 67 class CXXMethodDecl; 68 class CXXScopeSpec; 69 class CXXTemporary; 70 class CXXTryStmt; 71 class CallExpr; 72 class ClassTemplateDecl; 73 class ClassTemplatePartialSpecializationDecl; 74 class ClassTemplateSpecializationDecl; 75 class CodeCompleteConsumer; 76 class CodeCompletionAllocator; 77 class CodeCompletionResult; 78 class Decl; 79 class DeclAccessPair; 80 class DeclContext; 81 class DeclRefExpr; 82 class DeclaratorDecl; 83 class DeducedTemplateArgument; 84 class DependentDiagnostic; 85 class DesignatedInitExpr; 86 class Designation; 87 class EnumConstantDecl; 88 class Expr; 89 class ExtVectorType; 90 class ExternalSemaSource; 91 class FormatAttr; 92 class FriendDecl; 93 class FunctionDecl; 94 class FunctionProtoType; 95 class FunctionTemplateDecl; 96 class ImplicitConversionSequence; 97 class InitListExpr; 98 class InitializationKind; 99 class InitializationSequence; 100 class InitializedEntity; 101 class IntegerLiteral; 102 class LabelStmt; 103 class LangOptions; 104 class LocalInstantiationScope; 105 class LookupResult; 106 class MacroInfo; 107 class MultiLevelTemplateArgumentList; 108 class NamedDecl; 109 class NonNullAttr; 110 class ObjCCategoryDecl; 111 class ObjCCategoryImplDecl; 112 class ObjCCompatibleAliasDecl; 113 class ObjCContainerDecl; 114 class ObjCImplDecl; 115 class ObjCImplementationDecl; 116 class ObjCInterfaceDecl; 117 class ObjCIvarDecl; 118 template <class T> class ObjCList; 119 class ObjCMessageExpr; 120 class ObjCMethodDecl; 121 class ObjCPropertyDecl; 122 class ObjCProtocolDecl; 123 class OverloadCandidateSet; 124 class OverloadExpr; 125 class ParenListExpr; 126 class ParmVarDecl; 127 class Preprocessor; 128 class PseudoDestructorTypeStorage; 129 class QualType; 130 class StandardConversionSequence; 131 class Stmt; 132 class StringLiteral; 133 class SwitchStmt; 134 class TargetAttributesSema; 135 class TemplateArgument; 136 class TemplateArgumentList; 137 class TemplateArgumentLoc; 138 class TemplateDecl; 139 class TemplateParameterList; 140 class TemplatePartialOrderingContext; 141 class TemplateTemplateParmDecl; 142 class Token; 143 class TypeAliasDecl; 144 class TypedefDecl; 145 class TypedefNameDecl; 146 class TypeLoc; 147 class UnqualifiedId; 148 class UnresolvedLookupExpr; 149 class UnresolvedMemberExpr; 150 class UnresolvedSetImpl; 151 class UnresolvedSetIterator; 152 class UsingDecl; 153 class UsingShadowDecl; 154 class ValueDecl; 155 class VarDecl; 156 class VisibilityAttr; 157 class VisibleDeclConsumer; 158 class IndirectFieldDecl; 159 160namespace sema { 161 class AccessedEntity; 162 class BlockScopeInfo; 163 class DelayedDiagnostic; 164 class FunctionScopeInfo; 165 class TemplateDeductionInfo; 166} 167 168// FIXME: No way to easily map from TemplateTypeParmTypes to 169// TemplateTypeParmDecls, so we have this horrible PointerUnion. 170typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 171 SourceLocation> UnexpandedParameterPack; 172 173/// Sema - This implements semantic analysis and AST building for C. 174class Sema { 175 Sema(const Sema&); // DO NOT IMPLEMENT 176 void operator=(const Sema&); // DO NOT IMPLEMENT 177 mutable const TargetAttributesSema* TheTargetAttributesSema; 178public: 179 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 180 typedef OpaquePtr<TemplateName> TemplateTy; 181 typedef OpaquePtr<QualType> TypeTy; 182 183 OpenCLOptions OpenCLFeatures; 184 FPOptions FPFeatures; 185 186 const LangOptions &LangOpts; 187 Preprocessor &PP; 188 ASTContext &Context; 189 ASTConsumer &Consumer; 190 DiagnosticsEngine &Diags; 191 SourceManager &SourceMgr; 192 193 /// \brief Flag indicating whether or not to collect detailed statistics. 194 bool CollectStats; 195 196 /// \brief Source of additional semantic information. 197 ExternalSemaSource *ExternalSource; 198 199 /// \brief Code-completion consumer. 200 CodeCompleteConsumer *CodeCompleter; 201 202 /// CurContext - This is the current declaration context of parsing. 203 DeclContext *CurContext; 204 205 /// VAListTagName - The declaration name corresponding to __va_list_tag. 206 /// This is used as part of a hack to omit that class from ADL results. 207 DeclarationName VAListTagName; 208 209 /// PackContext - Manages the stack for #pragma pack. An alignment 210 /// of 0 indicates default alignment. 211 void *PackContext; // Really a "PragmaPackStack*" 212 213 bool MSStructPragmaOn; // True when #pragma ms_struct on 214 215 /// VisContext - Manages the stack for #pragma GCC visibility. 216 void *VisContext; // Really a "PragmaVisStack*" 217 218 /// ExprNeedsCleanups - True if the current evaluation context 219 /// requires cleanups to be run at its conclusion. 220 bool ExprNeedsCleanups; 221 222 /// \brief Stack containing information about each of the nested 223 /// function, block, and method scopes that are currently active. 224 /// 225 /// This array is never empty. Clients should ignore the first 226 /// element, which is used to cache a single FunctionScopeInfo 227 /// that's used to parse every top-level function. 228 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 229 230 /// ExprTemporaries - This is the stack of temporaries that are created by 231 /// the current full expression. 232 SmallVector<CXXTemporary*, 8> ExprTemporaries; 233 234 typedef LazyVector<TypedefNameDecl *, ExternalSemaSource, 235 &ExternalSemaSource::ReadExtVectorDecls, 2, 2> 236 ExtVectorDeclsType; 237 238 /// ExtVectorDecls - This is a list all the extended vector types. This allows 239 /// us to associate a raw vector type with one of the ext_vector type names. 240 /// This is only necessary for issuing pretty diagnostics. 241 ExtVectorDeclsType ExtVectorDecls; 242 243 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 244 llvm::OwningPtr<CXXFieldCollector> FieldCollector; 245 246 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 247 248 /// PureVirtualClassDiagSet - a set of class declarations which we have 249 /// emitted a list of pure virtual functions. Used to prevent emitting the 250 /// same list more than once. 251 llvm::OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 252 253 /// ParsingInitForAutoVars - a set of declarations with auto types for which 254 /// we are currently parsing the initializer. 255 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 256 257 /// \brief A mapping from external names to the most recent 258 /// locally-scoped external declaration with that name. 259 /// 260 /// This map contains external declarations introduced in local 261 /// scoped, e.g., 262 /// 263 /// \code 264 /// void f() { 265 /// void foo(int, int); 266 /// } 267 /// \endcode 268 /// 269 /// Here, the name "foo" will be associated with the declaration on 270 /// "foo" within f. This name is not visible outside of 271 /// "f". However, we still find it in two cases: 272 /// 273 /// - If we are declaring another external with the name "foo", we 274 /// can find "foo" as a previous declaration, so that the types 275 /// of this external declaration can be checked for 276 /// compatibility. 277 /// 278 /// - If we would implicitly declare "foo" (e.g., due to a call to 279 /// "foo" in C when no prototype or definition is visible), then 280 /// we find this declaration of "foo" and complain that it is 281 /// not visible. 282 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 283 284 /// \brief Look for a locally scoped external declaration by the given name. 285 llvm::DenseMap<DeclarationName, NamedDecl *>::iterator 286 findLocallyScopedExternalDecl(DeclarationName Name); 287 288 typedef LazyVector<VarDecl *, ExternalSemaSource, 289 &ExternalSemaSource::ReadTentativeDefinitions, 2, 2> 290 TentativeDefinitionsType; 291 292 /// \brief All the tentative definitions encountered in the TU. 293 TentativeDefinitionsType TentativeDefinitions; 294 295 typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource, 296 &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2> 297 UnusedFileScopedDeclsType; 298 299 /// \brief The set of file scoped decls seen so far that have not been used 300 /// and must warn if not used. Only contains the first declaration. 301 UnusedFileScopedDeclsType UnusedFileScopedDecls; 302 303 typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource, 304 &ExternalSemaSource::ReadDelegatingConstructors, 2, 2> 305 DelegatingCtorDeclsType; 306 307 /// \brief All the delegating constructors seen so far in the file, used for 308 /// cycle detection at the end of the TU. 309 DelegatingCtorDeclsType DelegatingCtorDecls; 310 311 /// \brief All the overriding destructors seen during a class definition 312 /// (there could be multiple due to nested classes) that had their exception 313 /// spec checks delayed, plus the overridden destructor. 314 SmallVector<std::pair<const CXXDestructorDecl*, 315 const CXXDestructorDecl*>, 2> 316 DelayedDestructorExceptionSpecChecks; 317 318 /// \brief Callback to the parser to parse templated functions when needed. 319 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 320 LateTemplateParserCB *LateTemplateParser; 321 void *OpaqueParser; 322 323 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 324 LateTemplateParser = LTP; 325 OpaqueParser = P; 326 } 327 328 class DelayedDiagnostics; 329 330 class ParsingDeclState { 331 unsigned SavedStackSize; 332 friend class Sema::DelayedDiagnostics; 333 }; 334 335 class ProcessingContextState { 336 unsigned SavedParsingDepth; 337 unsigned SavedActiveStackBase; 338 friend class Sema::DelayedDiagnostics; 339 }; 340 341 /// A class which encapsulates the logic for delaying diagnostics 342 /// during parsing and other processing. 343 class DelayedDiagnostics { 344 /// \brief The stack of diagnostics that were delayed due to being 345 /// produced during the parsing of a declaration. 346 sema::DelayedDiagnostic *Stack; 347 348 /// \brief The number of objects on the delayed-diagnostics stack. 349 unsigned StackSize; 350 351 /// \brief The current capacity of the delayed-diagnostics stack. 352 unsigned StackCapacity; 353 354 /// \brief The index of the first "active" delayed diagnostic in 355 /// the stack. When parsing class definitions, we ignore active 356 /// delayed diagnostics from the surrounding context. 357 unsigned ActiveStackBase; 358 359 /// \brief The depth of the declarations we're currently parsing. 360 /// This gets saved and reset whenever we enter a class definition. 361 unsigned ParsingDepth; 362 363 public: 364 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 365 ActiveStackBase(0), ParsingDepth(0) {} 366 367 ~DelayedDiagnostics() { 368 delete[] reinterpret_cast<char*>(Stack); 369 } 370 371 /// Adds a delayed diagnostic. 372 void add(const sema::DelayedDiagnostic &diag); 373 374 /// Determines whether diagnostics should be delayed. 375 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 376 377 /// Observe that we've started parsing a declaration. Access and 378 /// deprecation diagnostics will be delayed; when the declaration 379 /// is completed, all active delayed diagnostics will be evaluated 380 /// in its context, and then active diagnostics stack will be 381 /// popped down to the saved depth. 382 ParsingDeclState pushParsingDecl() { 383 ParsingDepth++; 384 385 ParsingDeclState state; 386 state.SavedStackSize = StackSize; 387 return state; 388 } 389 390 /// Observe that we're completed parsing a declaration. 391 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 392 393 /// Observe that we've started processing a different context, the 394 /// contents of which are semantically separate from the 395 /// declarations it may lexically appear in. This sets aside the 396 /// current stack of active diagnostics and starts afresh. 397 ProcessingContextState pushContext() { 398 assert(StackSize >= ActiveStackBase); 399 400 ProcessingContextState state; 401 state.SavedParsingDepth = ParsingDepth; 402 state.SavedActiveStackBase = ActiveStackBase; 403 404 ActiveStackBase = StackSize; 405 ParsingDepth = 0; 406 407 return state; 408 } 409 410 /// Observe that we've stopped processing a context. This 411 /// restores the previous stack of active diagnostics. 412 void popContext(ProcessingContextState state) { 413 assert(ActiveStackBase == StackSize); 414 assert(ParsingDepth == 0); 415 ActiveStackBase = state.SavedActiveStackBase; 416 ParsingDepth = state.SavedParsingDepth; 417 } 418 } DelayedDiagnostics; 419 420 /// A RAII object to temporarily push a declaration context. 421 class ContextRAII { 422 private: 423 Sema &S; 424 DeclContext *SavedContext; 425 ProcessingContextState SavedContextState; 426 427 public: 428 ContextRAII(Sema &S, DeclContext *ContextToPush) 429 : S(S), SavedContext(S.CurContext), 430 SavedContextState(S.DelayedDiagnostics.pushContext()) 431 { 432 assert(ContextToPush && "pushing null context"); 433 S.CurContext = ContextToPush; 434 } 435 436 void pop() { 437 if (!SavedContext) return; 438 S.CurContext = SavedContext; 439 S.DelayedDiagnostics.popContext(SavedContextState); 440 SavedContext = 0; 441 } 442 443 ~ContextRAII() { 444 pop(); 445 } 446 }; 447 448 /// WeakUndeclaredIdentifiers - Identifiers contained in 449 /// #pragma weak before declared. rare. may alias another 450 /// identifier, declared or undeclared 451 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 452 453 /// \brief Load weak undeclared identifiers from the external source. 454 void LoadExternalWeakUndeclaredIdentifiers(); 455 456 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 457 /// #pragma weak during processing of other Decls. 458 /// I couldn't figure out a clean way to generate these in-line, so 459 /// we store them here and handle separately -- which is a hack. 460 /// It would be best to refactor this. 461 SmallVector<Decl*,2> WeakTopLevelDecl; 462 463 IdentifierResolver IdResolver; 464 465 /// Translation Unit Scope - useful to Objective-C actions that need 466 /// to lookup file scope declarations in the "ordinary" C decl namespace. 467 /// For example, user-defined classes, built-in "id" type, etc. 468 Scope *TUScope; 469 470 /// \brief The C++ "std" namespace, where the standard library resides. 471 LazyDeclPtr StdNamespace; 472 473 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 474 /// standard library. 475 LazyDeclPtr StdBadAlloc; 476 477 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 478 RecordDecl *CXXTypeInfoDecl; 479 480 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 481 RecordDecl *MSVCGuidDecl; 482 483 /// A flag to remember whether the implicit forms of operator new and delete 484 /// have been declared. 485 bool GlobalNewDeleteDeclared; 486 487 488 /// A flag that is set when parsing a -dealloc method and no [super dealloc] 489 /// call was found yet. 490 bool ObjCShouldCallSuperDealloc; 491 /// A flag that is set when parsing a -finalize method and no [super finalize] 492 /// call was found yet. 493 bool ObjCShouldCallSuperFinalize; 494 495 /// \brief The set of declarations that have been referenced within 496 /// a potentially evaluated expression. 497 typedef SmallVector<std::pair<SourceLocation, Decl *>, 10> 498 PotentiallyReferencedDecls; 499 500 /// \brief A set of diagnostics that may be emitted. 501 typedef SmallVector<std::pair<SourceLocation, PartialDiagnostic>, 10> 502 PotentiallyEmittedDiagnostics; 503 504 /// \brief Describes how the expressions currently being parsed are 505 /// evaluated at run-time, if at all. 506 enum ExpressionEvaluationContext { 507 /// \brief The current expression and its subexpressions occur within an 508 /// unevaluated operand (C++0x [expr]p8), such as a constant expression 509 /// or the subexpression of \c sizeof, where the type or the value of the 510 /// expression may be significant but no code will be generated to evaluate 511 /// the value of the expression at run time. 512 Unevaluated, 513 514 /// \brief The current expression is potentially evaluated at run time, 515 /// which means that code may be generated to evaluate the value of the 516 /// expression at run time. 517 PotentiallyEvaluated, 518 519 /// \brief The current expression may be potentially evaluated or it may 520 /// be unevaluated, but it is impossible to tell from the lexical context. 521 /// This evaluation context is used primary for the operand of the C++ 522 /// \c typeid expression, whose argument is potentially evaluated only when 523 /// it is an lvalue of polymorphic class type (C++ [basic.def.odr]p2). 524 PotentiallyPotentiallyEvaluated, 525 526 /// \brief The current expression is potentially evaluated, but any 527 /// declarations referenced inside that expression are only used if 528 /// in fact the current expression is used. 529 /// 530 /// This value is used when parsing default function arguments, for which 531 /// we would like to provide diagnostics (e.g., passing non-POD arguments 532 /// through varargs) but do not want to mark declarations as "referenced" 533 /// until the default argument is used. 534 PotentiallyEvaluatedIfUsed 535 }; 536 537 /// \brief Data structure used to record current or nested 538 /// expression evaluation contexts. 539 struct ExpressionEvaluationContextRecord { 540 /// \brief The expression evaluation context. 541 ExpressionEvaluationContext Context; 542 543 /// \brief Whether the enclosing context needed a cleanup. 544 bool ParentNeedsCleanups; 545 546 /// \brief The number of temporaries that were active when we 547 /// entered this expression evaluation context. 548 unsigned NumTemporaries; 549 550 /// \brief The set of declarations referenced within a 551 /// potentially potentially-evaluated context. 552 /// 553 /// When leaving a potentially potentially-evaluated context, each 554 /// of these elements will be as referenced if the corresponding 555 /// potentially potentially evaluated expression is potentially 556 /// evaluated. 557 PotentiallyReferencedDecls *PotentiallyReferenced; 558 559 /// \brief The set of diagnostics to emit should this potentially 560 /// potentially-evaluated context become evaluated. 561 PotentiallyEmittedDiagnostics *PotentiallyDiagnosed; 562 563 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 564 unsigned NumTemporaries, 565 bool ParentNeedsCleanups) 566 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups), 567 NumTemporaries(NumTemporaries), 568 PotentiallyReferenced(0), PotentiallyDiagnosed(0) { } 569 570 void addReferencedDecl(SourceLocation Loc, Decl *Decl) { 571 if (!PotentiallyReferenced) 572 PotentiallyReferenced = new PotentiallyReferencedDecls; 573 PotentiallyReferenced->push_back(std::make_pair(Loc, Decl)); 574 } 575 576 void addDiagnostic(SourceLocation Loc, const PartialDiagnostic &PD) { 577 if (!PotentiallyDiagnosed) 578 PotentiallyDiagnosed = new PotentiallyEmittedDiagnostics; 579 PotentiallyDiagnosed->push_back(std::make_pair(Loc, PD)); 580 } 581 582 void Destroy() { 583 delete PotentiallyReferenced; 584 delete PotentiallyDiagnosed; 585 PotentiallyReferenced = 0; 586 PotentiallyDiagnosed = 0; 587 } 588 }; 589 590 /// A stack of expression evaluation contexts. 591 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 592 593 /// SpecialMemberOverloadResult - The overloading result for a special member 594 /// function. 595 /// 596 /// This is basically a wrapper around PointerIntPair. The lowest bit of the 597 /// integer is used to determine whether we have a parameter qualification 598 /// match, the second-lowest is whether we had success in resolving the 599 /// overload to a unique non-deleted function. 600 /// 601 /// The ConstParamMatch bit represents whether, when looking up a copy 602 /// constructor or assignment operator, we found a potential copy 603 /// constructor/assignment operator whose first parameter is const-qualified. 604 /// This is used for determining parameter types of other objects and is 605 /// utterly meaningless on other types of special members. 606 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 607 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 608 public: 609 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 610 : FastFoldingSetNode(ID) 611 {} 612 613 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 614 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 615 616 bool hasSuccess() const { return Pair.getInt() & 0x1; } 617 void setSuccess(bool B) { 618 Pair.setInt(unsigned(B) | hasConstParamMatch() << 1); 619 } 620 621 bool hasConstParamMatch() const { return Pair.getInt() & 0x2; } 622 void setConstParamMatch(bool B) { 623 Pair.setInt(B << 1 | unsigned(hasSuccess())); 624 } 625 }; 626 627 /// \brief A cache of special member function overload resolution results 628 /// for C++ records. 629 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 630 631 /// \brief The kind of translation unit we are processing. 632 /// 633 /// When we're processing a complete translation unit, Sema will perform 634 /// end-of-translation-unit semantic tasks (such as creating 635 /// initializers for tentative definitions in C) once parsing has 636 /// completed. Modules and precompiled headers perform different kinds of 637 /// checks. 638 TranslationUnitKind TUKind; 639 640 llvm::BumpPtrAllocator BumpAlloc; 641 642 /// \brief The number of SFINAE diagnostics that have been trapped. 643 unsigned NumSFINAEErrors; 644 645 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> > 646 UnparsedDefaultArgInstantiationsMap; 647 648 /// \brief A mapping from parameters with unparsed default arguments to the 649 /// set of instantiations of each parameter. 650 /// 651 /// This mapping is a temporary data structure used when parsing 652 /// nested class templates or nested classes of class templates, 653 /// where we might end up instantiating an inner class before the 654 /// default arguments of its methods have been parsed. 655 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 656 657 // Contains the locations of the beginning of unparsed default 658 // argument locations. 659 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 660 661 /// UndefinedInternals - all the used, undefined objects with 662 /// internal linkage in this translation unit. 663 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 664 665 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 666 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 667 668 /// Method Pool - allows efficient lookup when typechecking messages to "id". 669 /// We need to maintain a list, since selectors can have differing signatures 670 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 671 /// of selectors are "overloaded"). 672 GlobalMethodPool MethodPool; 673 674 /// Method selectors used in a @selector expression. Used for implementation 675 /// of -Wselector. 676 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 677 678 GlobalMethodPool::iterator ReadMethodPool(Selector Sel); 679 680 /// Private Helper predicate to check for 'self'. Upon success, it 681 /// returns method declaration where 'self' is referenced. 682 const ObjCMethodDecl *GetMethodIfSelfExpr(Expr *RExpr); 683public: 684 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 685 TranslationUnitKind TUKind = TU_Complete, 686 CodeCompleteConsumer *CompletionConsumer = 0); 687 ~Sema(); 688 689 /// \brief Perform initialization that occurs after the parser has been 690 /// initialized but before it parses anything. 691 void Initialize(); 692 693 const LangOptions &getLangOptions() const { return LangOpts; } 694 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 695 FPOptions &getFPOptions() { return FPFeatures; } 696 697 DiagnosticsEngine &getDiagnostics() const { return Diags; } 698 SourceManager &getSourceManager() const { return SourceMgr; } 699 const TargetAttributesSema &getTargetAttributesSema() const; 700 Preprocessor &getPreprocessor() const { return PP; } 701 ASTContext &getASTContext() const { return Context; } 702 ASTConsumer &getASTConsumer() const { return Consumer; } 703 ASTMutationListener *getASTMutationListener() const; 704 705 void PrintStats() const; 706 707 /// \brief Helper class that creates diagnostics with optional 708 /// template instantiation stacks. 709 /// 710 /// This class provides a wrapper around the basic DiagnosticBuilder 711 /// class that emits diagnostics. SemaDiagnosticBuilder is 712 /// responsible for emitting the diagnostic (as DiagnosticBuilder 713 /// does) and, if the diagnostic comes from inside a template 714 /// instantiation, printing the template instantiation stack as 715 /// well. 716 class SemaDiagnosticBuilder : public DiagnosticBuilder { 717 Sema &SemaRef; 718 unsigned DiagID; 719 720 public: 721 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 722 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 723 724 explicit SemaDiagnosticBuilder(Sema &SemaRef) 725 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 726 727 ~SemaDiagnosticBuilder(); 728 }; 729 730 /// \brief Emit a diagnostic. 731 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 732 733 /// \brief Emit a partial diagnostic. 734 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 735 736 /// \brief Build a partial diagnostic. 737 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 738 739 bool findMacroSpelling(SourceLocation &loc, StringRef name); 740 741 ExprResult Owned(Expr* E) { return E; } 742 ExprResult Owned(ExprResult R) { return R; } 743 StmtResult Owned(Stmt* S) { return S; } 744 745 void ActOnEndOfTranslationUnit(); 746 747 void CheckDelegatingCtorCycles(); 748 749 Scope *getScopeForContext(DeclContext *Ctx); 750 751 void PushFunctionScope(); 752 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 753 void PopFunctionOrBlockScope(const sema::AnalysisBasedWarnings::Policy *WP =0, 754 const Decl *D = 0, const BlockExpr *blkExpr = 0); 755 756 sema::FunctionScopeInfo *getCurFunction() const { 757 return FunctionScopes.back(); 758 } 759 760 bool hasAnyUnrecoverableErrorsInThisFunction() const; 761 762 /// \brief Retrieve the current block, if any. 763 sema::BlockScopeInfo *getCurBlock(); 764 765 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 766 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 767 768 //===--------------------------------------------------------------------===// 769 // Type Analysis / Processing: SemaType.cpp. 770 // 771 772 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 773 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 774 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 775 } 776 QualType BuildPointerType(QualType T, 777 SourceLocation Loc, DeclarationName Entity); 778 QualType BuildReferenceType(QualType T, bool LValueRef, 779 SourceLocation Loc, DeclarationName Entity); 780 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 781 Expr *ArraySize, unsigned Quals, 782 SourceRange Brackets, DeclarationName Entity); 783 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 784 SourceLocation AttrLoc); 785 QualType BuildFunctionType(QualType T, 786 QualType *ParamTypes, unsigned NumParamTypes, 787 bool Variadic, unsigned Quals, 788 RefQualifierKind RefQualifier, 789 SourceLocation Loc, DeclarationName Entity, 790 FunctionType::ExtInfo Info); 791 QualType BuildMemberPointerType(QualType T, QualType Class, 792 SourceLocation Loc, 793 DeclarationName Entity); 794 QualType BuildBlockPointerType(QualType T, 795 SourceLocation Loc, DeclarationName Entity); 796 QualType BuildParenType(QualType T); 797 798 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); 799 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); 800 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 801 TypeSourceInfo *ReturnTypeInfo); 802 /// \brief Package the given type and TSI into a ParsedType. 803 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 804 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 805 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 806 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 807 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 808 bool CheckDistantExceptionSpec(QualType T); 809 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 810 bool CheckEquivalentExceptionSpec( 811 const FunctionProtoType *Old, SourceLocation OldLoc, 812 const FunctionProtoType *New, SourceLocation NewLoc); 813 bool CheckEquivalentExceptionSpec( 814 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 815 const FunctionProtoType *Old, SourceLocation OldLoc, 816 const FunctionProtoType *New, SourceLocation NewLoc, 817 bool *MissingExceptionSpecification = 0, 818 bool *MissingEmptyExceptionSpecification = 0, 819 bool AllowNoexceptAllMatchWithNoSpec = false, 820 bool IsOperatorNew = false); 821 bool CheckExceptionSpecSubset( 822 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 823 const FunctionProtoType *Superset, SourceLocation SuperLoc, 824 const FunctionProtoType *Subset, SourceLocation SubLoc); 825 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 826 const FunctionProtoType *Target, SourceLocation TargetLoc, 827 const FunctionProtoType *Source, SourceLocation SourceLoc); 828 829 TypeResult ActOnTypeName(Scope *S, Declarator &D); 830 831 /// \brief The parser has parsed the context-sensitive type 'instancetype' 832 /// in an Objective-C message declaration. Return the appropriate type. 833 ParsedType ActOnObjCInstanceType(SourceLocation Loc); 834 835 bool RequireCompleteType(SourceLocation Loc, QualType T, 836 const PartialDiagnostic &PD, 837 std::pair<SourceLocation, PartialDiagnostic> Note); 838 bool RequireCompleteType(SourceLocation Loc, QualType T, 839 const PartialDiagnostic &PD); 840 bool RequireCompleteType(SourceLocation Loc, QualType T, 841 unsigned DiagID); 842 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 843 std::pair<SourceLocation, 844 PartialDiagnostic> Note); 845 846 847 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 848 const CXXScopeSpec &SS, QualType T); 849 850 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 851 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 852 QualType BuildUnaryTransformType(QualType BaseType, 853 UnaryTransformType::UTTKind UKind, 854 SourceLocation Loc); 855 856 //===--------------------------------------------------------------------===// 857 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 858 // 859 860 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 861 862 void DiagnoseUseOfUnimplementedSelectors(); 863 864 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 865 Scope *S, CXXScopeSpec *SS = 0, 866 bool isClassName = false, 867 bool HasTrailingDot = false, 868 ParsedType ObjectType = ParsedType(), 869 bool WantNontrivialTypeSourceInfo = false); 870 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 871 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS); 872 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 873 SourceLocation IILoc, 874 Scope *S, 875 CXXScopeSpec *SS, 876 ParsedType &SuggestedType); 877 878 /// \brief Describes the result of the name lookup and resolution performed 879 /// by \c ClassifyName(). 880 enum NameClassificationKind { 881 NC_Unknown, 882 NC_Error, 883 NC_Keyword, 884 NC_Type, 885 NC_Expression, 886 NC_NestedNameSpecifier, 887 NC_TypeTemplate, 888 NC_FunctionTemplate 889 }; 890 891 class NameClassification { 892 NameClassificationKind Kind; 893 ExprResult Expr; 894 TemplateName Template; 895 ParsedType Type; 896 const IdentifierInfo *Keyword; 897 898 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 899 900 public: 901 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 902 903 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 904 905 NameClassification(const IdentifierInfo *Keyword) 906 : Kind(NC_Keyword), Keyword(Keyword) { } 907 908 static NameClassification Error() { 909 return NameClassification(NC_Error); 910 } 911 912 static NameClassification Unknown() { 913 return NameClassification(NC_Unknown); 914 } 915 916 static NameClassification NestedNameSpecifier() { 917 return NameClassification(NC_NestedNameSpecifier); 918 } 919 920 static NameClassification TypeTemplate(TemplateName Name) { 921 NameClassification Result(NC_TypeTemplate); 922 Result.Template = Name; 923 return Result; 924 } 925 926 static NameClassification FunctionTemplate(TemplateName Name) { 927 NameClassification Result(NC_FunctionTemplate); 928 Result.Template = Name; 929 return Result; 930 } 931 932 NameClassificationKind getKind() const { return Kind; } 933 934 ParsedType getType() const { 935 assert(Kind == NC_Type); 936 return Type; 937 } 938 939 ExprResult getExpression() const { 940 assert(Kind == NC_Expression); 941 return Expr; 942 } 943 944 TemplateName getTemplateName() const { 945 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 946 return Template; 947 } 948 949 TemplateNameKind getTemplateNameKind() const { 950 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 951 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 952 } 953}; 954 955 /// \brief Perform name lookup on the given name, classifying it based on 956 /// the results of name lookup and the following token. 957 /// 958 /// This routine is used by the parser to resolve identifiers and help direct 959 /// parsing. When the identifier cannot be found, this routine will attempt 960 /// to correct the typo and classify based on the resulting name. 961 /// 962 /// \param S The scope in which we're performing name lookup. 963 /// 964 /// \param SS The nested-name-specifier that precedes the name. 965 /// 966 /// \param Name The identifier. If typo correction finds an alternative name, 967 /// this pointer parameter will be updated accordingly. 968 /// 969 /// \param NameLoc The location of the identifier. 970 /// 971 /// \param NextToken The token following the identifier. Used to help 972 /// disambiguate the name. 973 NameClassification ClassifyName(Scope *S, 974 CXXScopeSpec &SS, 975 IdentifierInfo *&Name, 976 SourceLocation NameLoc, 977 const Token &NextToken); 978 979 Decl *ActOnDeclarator(Scope *S, Declarator &D); 980 981 Decl *HandleDeclarator(Scope *S, Declarator &D, 982 MultiTemplateParamsArg TemplateParameterLists, 983 bool IsFunctionDefinition); 984 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 985 const LookupResult &Previous, 986 Scope *S); 987 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 988 void DiagnoseFunctionSpecifiers(Declarator& D); 989 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 990 void CheckShadow(Scope *S, VarDecl *D); 991 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 992 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 993 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 994 QualType R, TypeSourceInfo *TInfo, 995 LookupResult &Previous, bool &Redeclaration); 996 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 997 LookupResult &Previous, bool &Redeclaration); 998 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 999 QualType R, TypeSourceInfo *TInfo, 1000 LookupResult &Previous, 1001 MultiTemplateParamsArg TemplateParamLists, 1002 bool &Redeclaration); 1003 void CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous, 1004 bool &Redeclaration); 1005 void CheckCompleteVariableDeclaration(VarDecl *var); 1006 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1007 QualType R, TypeSourceInfo *TInfo, 1008 LookupResult &Previous, 1009 MultiTemplateParamsArg TemplateParamLists, 1010 bool IsFunctionDefinition, 1011 bool &Redeclaration, 1012 bool &AddToScope); 1013 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1014 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1015 void CheckFunctionDeclaration(Scope *S, 1016 FunctionDecl *NewFD, LookupResult &Previous, 1017 bool IsExplicitSpecialization, 1018 bool &Redeclaration); 1019 void CheckMain(FunctionDecl *FD, const DeclSpec &D); 1020 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1021 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1022 SourceLocation Loc, 1023 QualType T); 1024 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1025 SourceLocation NameLoc, IdentifierInfo *Name, 1026 QualType T, TypeSourceInfo *TSInfo, 1027 StorageClass SC, StorageClass SCAsWritten); 1028 void ActOnParamDefaultArgument(Decl *param, 1029 SourceLocation EqualLoc, 1030 Expr *defarg); 1031 void ActOnParamUnparsedDefaultArgument(Decl *param, 1032 SourceLocation EqualLoc, 1033 SourceLocation ArgLoc); 1034 void ActOnParamDefaultArgumentError(Decl *param); 1035 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1036 SourceLocation EqualLoc); 1037 1038 void CheckSelfReference(Decl *OrigDecl, Expr *E); 1039 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1040 bool TypeMayContainAuto); 1041 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1042 void ActOnInitializerError(Decl *Dcl); 1043 void ActOnCXXForRangeDecl(Decl *D); 1044 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1045 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1046 void FinalizeDeclaration(Decl *D); 1047 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1048 Decl **Group, 1049 unsigned NumDecls); 1050 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1051 bool TypeMayContainAuto = true); 1052 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1053 SourceLocation LocAfterDecls); 1054 void CheckForFunctionRedefinition(FunctionDecl *FD); 1055 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1056 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1057 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1058 1059 void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope); 1060 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1061 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1062 1063 /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an 1064 /// attribute for which parsing is delayed. 1065 void ActOnFinishDelayedAttribute(Scope *S, Decl *D, ParsedAttributes &Attrs); 1066 1067 /// \brief Diagnose any unused parameters in the given sequence of 1068 /// ParmVarDecl pointers. 1069 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1070 ParmVarDecl * const *End); 1071 1072 /// \brief Diagnose whether the size of parameters or return value of a 1073 /// function or obj-c method definition is pass-by-value and larger than a 1074 /// specified threshold. 1075 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1076 ParmVarDecl * const *End, 1077 QualType ReturnTy, 1078 NamedDecl *D); 1079 1080 void DiagnoseInvalidJumps(Stmt *Body); 1081 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1082 SourceLocation AsmLoc, 1083 SourceLocation RParenLoc); 1084 1085 /// \brief The parser has processed a module import declaration. 1086 /// 1087 /// \param ImportLoc The location of the '__import_module__' keyword. 1088 /// 1089 /// \param ModuleName The name of the module. 1090 /// 1091 /// \param ModuleNameLoc The location of the module name. 1092 DeclResult ActOnModuleImport(SourceLocation ImportLoc, 1093 IdentifierInfo &ModuleName, 1094 SourceLocation ModuleNameLoc); 1095 1096 /// \brief Diagnose that \p New is a module-private redeclaration of 1097 /// \p Old. 1098 void diagnoseModulePrivateRedeclaration(NamedDecl *New, NamedDecl *Old, 1099 SourceLocation ModulePrivateKeyword 1100 = SourceLocation()); 1101 1102 /// Scope actions. 1103 void ActOnPopScope(SourceLocation Loc, Scope *S); 1104 void ActOnTranslationUnitScope(Scope *S); 1105 1106 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1107 DeclSpec &DS); 1108 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1109 DeclSpec &DS, 1110 MultiTemplateParamsArg TemplateParams); 1111 1112 StmtResult ActOnVlaStmt(const DeclSpec &DS); 1113 1114 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1115 AccessSpecifier AS, 1116 RecordDecl *Record); 1117 1118 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1119 RecordDecl *Record); 1120 1121 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1122 TagTypeKind NewTag, bool isDefinition, 1123 SourceLocation NewTagLoc, 1124 const IdentifierInfo &Name); 1125 1126 enum TagUseKind { 1127 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1128 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1129 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1130 TUK_Friend // Friend declaration: 'friend struct foo;' 1131 }; 1132 1133 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1134 SourceLocation KWLoc, CXXScopeSpec &SS, 1135 IdentifierInfo *Name, SourceLocation NameLoc, 1136 AttributeList *Attr, AccessSpecifier AS, 1137 SourceLocation ModulePrivateLoc, 1138 MultiTemplateParamsArg TemplateParameterLists, 1139 bool &OwnedDecl, bool &IsDependent, bool ScopedEnum, 1140 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1141 1142 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1143 unsigned TagSpec, SourceLocation TagLoc, 1144 CXXScopeSpec &SS, 1145 IdentifierInfo *Name, SourceLocation NameLoc, 1146 AttributeList *Attr, 1147 MultiTemplateParamsArg TempParamLists); 1148 1149 TypeResult ActOnDependentTag(Scope *S, 1150 unsigned TagSpec, 1151 TagUseKind TUK, 1152 const CXXScopeSpec &SS, 1153 IdentifierInfo *Name, 1154 SourceLocation TagLoc, 1155 SourceLocation NameLoc); 1156 1157 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1158 IdentifierInfo *ClassName, 1159 SmallVectorImpl<Decl *> &Decls); 1160 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1161 Declarator &D, Expr *BitfieldWidth); 1162 1163 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1164 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1165 AccessSpecifier AS); 1166 1167 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1168 TypeSourceInfo *TInfo, 1169 RecordDecl *Record, SourceLocation Loc, 1170 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1171 SourceLocation TSSL, 1172 AccessSpecifier AS, NamedDecl *PrevDecl, 1173 Declarator *D = 0); 1174 1175 enum CXXSpecialMember { 1176 CXXDefaultConstructor, 1177 CXXCopyConstructor, 1178 CXXMoveConstructor, 1179 CXXCopyAssignment, 1180 CXXMoveAssignment, 1181 CXXDestructor, 1182 CXXInvalid 1183 }; 1184 bool CheckNontrivialField(FieldDecl *FD); 1185 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1186 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1187 void ActOnLastBitfield(SourceLocation DeclStart, 1188 SmallVectorImpl<Decl *> &AllIvarDecls); 1189 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, 1190 Declarator &D, Expr *BitfieldWidth, 1191 tok::ObjCKeywordKind visibility); 1192 1193 // This is used for both record definitions and ObjC interface declarations. 1194 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1195 llvm::ArrayRef<Decl *> Fields, 1196 SourceLocation LBrac, SourceLocation RBrac, 1197 AttributeList *AttrList); 1198 1199 /// ActOnTagStartDefinition - Invoked when we have entered the 1200 /// scope of a tag's definition (e.g., for an enumeration, class, 1201 /// struct, or union). 1202 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1203 1204 void ActOnObjCContainerStartDefinition(Decl *IDecl); 1205 1206 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1207 /// C++ record definition's base-specifiers clause and are starting its 1208 /// member declarations. 1209 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1210 SourceLocation FinalLoc, 1211 SourceLocation LBraceLoc); 1212 1213 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1214 /// the definition of a tag (enumeration, class, struct, or union). 1215 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1216 SourceLocation RBraceLoc); 1217 1218 void ActOnObjCContainerFinishDefinition(); 1219 1220 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1221 /// error parsing the definition of a tag. 1222 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1223 1224 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1225 EnumConstantDecl *LastEnumConst, 1226 SourceLocation IdLoc, 1227 IdentifierInfo *Id, 1228 Expr *val); 1229 1230 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1231 SourceLocation IdLoc, IdentifierInfo *Id, 1232 AttributeList *Attrs, 1233 SourceLocation EqualLoc, Expr *Val); 1234 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1235 SourceLocation RBraceLoc, Decl *EnumDecl, 1236 Decl **Elements, unsigned NumElements, 1237 Scope *S, AttributeList *Attr); 1238 1239 DeclContext *getContainingDC(DeclContext *DC); 1240 1241 /// Set the current declaration context until it gets popped. 1242 void PushDeclContext(Scope *S, DeclContext *DC); 1243 void PopDeclContext(); 1244 1245 /// EnterDeclaratorContext - Used when we must lookup names in the context 1246 /// of a declarator's nested name specifier. 1247 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1248 void ExitDeclaratorContext(Scope *S); 1249 1250 /// Push the parameters of D, which must be a function, into scope. 1251 void ActOnReenterFunctionContext(Scope* S, Decl* D); 1252 void ActOnExitFunctionContext() { PopDeclContext(); } 1253 1254 DeclContext *getFunctionLevelDeclContext(); 1255 1256 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1257 /// to the function decl for the function being parsed. If we're currently 1258 /// in a 'block', this returns the containing context. 1259 FunctionDecl *getCurFunctionDecl(); 1260 1261 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1262 /// the method decl for the method being parsed. If we're currently 1263 /// in a 'block', this returns the containing context. 1264 ObjCMethodDecl *getCurMethodDecl(); 1265 1266 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1267 /// or C function we're in, otherwise return null. If we're currently 1268 /// in a 'block', this returns the containing context. 1269 NamedDecl *getCurFunctionOrMethodDecl(); 1270 1271 /// Add this decl to the scope shadowed decl chains. 1272 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1273 1274 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1275 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1276 /// true if 'D' belongs to the given declaration context. 1277 /// 1278 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1279 /// whether the declaration is in scope for the purposes of explicit template 1280 /// instantiation or specialization. The default is false. 1281 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1282 bool ExplicitInstantiationOrSpecialization = false); 1283 1284 /// Finds the scope corresponding to the given decl context, if it 1285 /// happens to be an enclosing scope. Otherwise return NULL. 1286 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1287 1288 /// Subroutines of ActOnDeclarator(). 1289 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1290 TypeSourceInfo *TInfo); 1291 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1292 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1293 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1294 void mergeObjCMethodDecls(ObjCMethodDecl *New, const ObjCMethodDecl *Old); 1295 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1296 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1297 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1298 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1299 1300 // AssignmentAction - This is used by all the assignment diagnostic functions 1301 // to represent what is actually causing the operation 1302 enum AssignmentAction { 1303 AA_Assigning, 1304 AA_Passing, 1305 AA_Returning, 1306 AA_Converting, 1307 AA_Initializing, 1308 AA_Sending, 1309 AA_Casting 1310 }; 1311 1312 /// C++ Overloading. 1313 enum OverloadKind { 1314 /// This is a legitimate overload: the existing declarations are 1315 /// functions or function templates with different signatures. 1316 Ovl_Overload, 1317 1318 /// This is not an overload because the signature exactly matches 1319 /// an existing declaration. 1320 Ovl_Match, 1321 1322 /// This is not an overload because the lookup results contain a 1323 /// non-function. 1324 Ovl_NonFunction 1325 }; 1326 OverloadKind CheckOverload(Scope *S, 1327 FunctionDecl *New, 1328 const LookupResult &OldDecls, 1329 NamedDecl *&OldDecl, 1330 bool IsForUsingDecl); 1331 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1332 1333 /// \brief Checks availability of the function depending on the current 1334 /// function context.Inside an unavailable function,unavailability is ignored. 1335 /// 1336 /// \returns true if \arg FD is unavailable and current context is inside 1337 /// an available function, false otherwise. 1338 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1339 1340 ImplicitConversionSequence 1341 TryImplicitConversion(Expr *From, QualType ToType, 1342 bool SuppressUserConversions, 1343 bool AllowExplicit, 1344 bool InOverloadResolution, 1345 bool CStyle, 1346 bool AllowObjCWritebackConversion); 1347 1348 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1349 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1350 bool IsComplexPromotion(QualType FromType, QualType ToType); 1351 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1352 bool InOverloadResolution, 1353 QualType& ConvertedType, bool &IncompatibleObjC); 1354 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1355 QualType& ConvertedType, bool &IncompatibleObjC); 1356 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1357 QualType &ConvertedType); 1358 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1359 QualType& ConvertedType); 1360 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1361 const FunctionProtoType *NewType); 1362 1363 CastKind PrepareCastToObjCObjectPointer(ExprResult &E); 1364 bool CheckPointerConversion(Expr *From, QualType ToType, 1365 CastKind &Kind, 1366 CXXCastPath& BasePath, 1367 bool IgnoreBaseAccess); 1368 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1369 bool InOverloadResolution, 1370 QualType &ConvertedType); 1371 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1372 CastKind &Kind, 1373 CXXCastPath &BasePath, 1374 bool IgnoreBaseAccess); 1375 bool IsQualificationConversion(QualType FromType, QualType ToType, 1376 bool CStyle, bool &ObjCLifetimeConversion); 1377 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1378 QualType &ResultTy); 1379 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1380 1381 1382 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1383 const VarDecl *NRVOCandidate, 1384 QualType ResultType, 1385 Expr *Value, 1386 bool AllowNRVO = true); 1387 1388 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1389 ExprResult Init); 1390 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1391 SourceLocation EqualLoc, 1392 ExprResult Init, 1393 bool TopLevelOfInitList = false); 1394 ExprResult PerformObjectArgumentInitialization(Expr *From, 1395 NestedNameSpecifier *Qualifier, 1396 NamedDecl *FoundDecl, 1397 CXXMethodDecl *Method); 1398 1399 ExprResult PerformContextuallyConvertToBool(Expr *From); 1400 ExprResult PerformContextuallyConvertToObjCPointer(Expr *From); 1401 1402 ExprResult 1403 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1404 const PartialDiagnostic &NotIntDiag, 1405 const PartialDiagnostic &IncompleteDiag, 1406 const PartialDiagnostic &ExplicitConvDiag, 1407 const PartialDiagnostic &ExplicitConvNote, 1408 const PartialDiagnostic &AmbigDiag, 1409 const PartialDiagnostic &AmbigNote, 1410 const PartialDiagnostic &ConvDiag); 1411 1412 ExprResult PerformObjectMemberConversion(Expr *From, 1413 NestedNameSpecifier *Qualifier, 1414 NamedDecl *FoundDecl, 1415 NamedDecl *Member); 1416 1417 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1418 // TODO: make this is a typesafe union. 1419 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1420 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1421 1422 void AddOverloadCandidate(NamedDecl *Function, 1423 DeclAccessPair FoundDecl, 1424 Expr **Args, unsigned NumArgs, 1425 OverloadCandidateSet &CandidateSet); 1426 1427 void AddOverloadCandidate(FunctionDecl *Function, 1428 DeclAccessPair FoundDecl, 1429 Expr **Args, unsigned NumArgs, 1430 OverloadCandidateSet& CandidateSet, 1431 bool SuppressUserConversions = false, 1432 bool PartialOverloading = false); 1433 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1434 Expr **Args, unsigned NumArgs, 1435 OverloadCandidateSet& CandidateSet, 1436 bool SuppressUserConversions = false); 1437 void AddMethodCandidate(DeclAccessPair FoundDecl, 1438 QualType ObjectType, 1439 Expr::Classification ObjectClassification, 1440 Expr **Args, unsigned NumArgs, 1441 OverloadCandidateSet& CandidateSet, 1442 bool SuppressUserConversion = false); 1443 void AddMethodCandidate(CXXMethodDecl *Method, 1444 DeclAccessPair FoundDecl, 1445 CXXRecordDecl *ActingContext, QualType ObjectType, 1446 Expr::Classification ObjectClassification, 1447 Expr **Args, unsigned NumArgs, 1448 OverloadCandidateSet& CandidateSet, 1449 bool SuppressUserConversions = false); 1450 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1451 DeclAccessPair FoundDecl, 1452 CXXRecordDecl *ActingContext, 1453 TemplateArgumentListInfo *ExplicitTemplateArgs, 1454 QualType ObjectType, 1455 Expr::Classification ObjectClassification, 1456 Expr **Args, unsigned NumArgs, 1457 OverloadCandidateSet& CandidateSet, 1458 bool SuppressUserConversions = false); 1459 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1460 DeclAccessPair FoundDecl, 1461 TemplateArgumentListInfo *ExplicitTemplateArgs, 1462 Expr **Args, unsigned NumArgs, 1463 OverloadCandidateSet& CandidateSet, 1464 bool SuppressUserConversions = false); 1465 void AddConversionCandidate(CXXConversionDecl *Conversion, 1466 DeclAccessPair FoundDecl, 1467 CXXRecordDecl *ActingContext, 1468 Expr *From, QualType ToType, 1469 OverloadCandidateSet& CandidateSet); 1470 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1471 DeclAccessPair FoundDecl, 1472 CXXRecordDecl *ActingContext, 1473 Expr *From, QualType ToType, 1474 OverloadCandidateSet &CandidateSet); 1475 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1476 DeclAccessPair FoundDecl, 1477 CXXRecordDecl *ActingContext, 1478 const FunctionProtoType *Proto, 1479 Expr *Object, Expr **Args, unsigned NumArgs, 1480 OverloadCandidateSet& CandidateSet); 1481 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1482 SourceLocation OpLoc, 1483 Expr **Args, unsigned NumArgs, 1484 OverloadCandidateSet& CandidateSet, 1485 SourceRange OpRange = SourceRange()); 1486 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1487 Expr **Args, unsigned NumArgs, 1488 OverloadCandidateSet& CandidateSet, 1489 bool IsAssignmentOperator = false, 1490 unsigned NumContextualBoolArguments = 0); 1491 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1492 SourceLocation OpLoc, 1493 Expr **Args, unsigned NumArgs, 1494 OverloadCandidateSet& CandidateSet); 1495 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1496 bool Operator, 1497 Expr **Args, unsigned NumArgs, 1498 TemplateArgumentListInfo *ExplicitTemplateArgs, 1499 OverloadCandidateSet& CandidateSet, 1500 bool PartialOverloading = false, 1501 bool StdNamespaceIsAssociated = false); 1502 1503 // Emit as a 'note' the specific overload candidate 1504 void NoteOverloadCandidate(FunctionDecl *Fn); 1505 1506 // Emit as a series of 'note's all template and non-templates 1507 // identified by the expression Expr 1508 void NoteAllOverloadCandidates(Expr* E); 1509 1510 // [PossiblyAFunctionType] --> [Return] 1511 // NonFunctionType --> NonFunctionType 1512 // R (A) --> R(A) 1513 // R (*)(A) --> R (A) 1514 // R (&)(A) --> R (A) 1515 // R (S::*)(A) --> R (A) 1516 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1517 1518 FunctionDecl *ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, QualType TargetType, 1519 bool Complain, 1520 DeclAccessPair &Found); 1521 1522 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1523 bool Complain = false, 1524 DeclAccessPair* Found = 0); 1525 1526 ExprResult ResolveAndFixSingleFunctionTemplateSpecialization( 1527 Expr *SrcExpr, bool DoFunctionPointerConverion = false, 1528 bool Complain = false, 1529 const SourceRange& OpRangeForComplaining = SourceRange(), 1530 QualType DestTypeForComplaining = QualType(), 1531 unsigned DiagIDForComplaining = 0); 1532 1533 1534 Expr *FixOverloadedFunctionReference(Expr *E, 1535 DeclAccessPair FoundDecl, 1536 FunctionDecl *Fn); 1537 ExprResult FixOverloadedFunctionReference(ExprResult, 1538 DeclAccessPair FoundDecl, 1539 FunctionDecl *Fn); 1540 1541 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1542 Expr **Args, unsigned NumArgs, 1543 OverloadCandidateSet &CandidateSet, 1544 bool PartialOverloading = false); 1545 1546 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1547 UnresolvedLookupExpr *ULE, 1548 SourceLocation LParenLoc, 1549 Expr **Args, unsigned NumArgs, 1550 SourceLocation RParenLoc, 1551 Expr *ExecConfig); 1552 1553 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1554 unsigned Opc, 1555 const UnresolvedSetImpl &Fns, 1556 Expr *input); 1557 1558 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1559 unsigned Opc, 1560 const UnresolvedSetImpl &Fns, 1561 Expr *LHS, Expr *RHS); 1562 1563 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1564 SourceLocation RLoc, 1565 Expr *Base,Expr *Idx); 1566 1567 ExprResult 1568 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1569 SourceLocation LParenLoc, Expr **Args, 1570 unsigned NumArgs, SourceLocation RParenLoc); 1571 ExprResult 1572 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1573 Expr **Args, unsigned NumArgs, 1574 SourceLocation RParenLoc); 1575 1576 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1577 SourceLocation OpLoc); 1578 1579 /// CheckCallReturnType - Checks that a call expression's return type is 1580 /// complete. Returns true on failure. The location passed in is the location 1581 /// that best represents the call. 1582 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1583 CallExpr *CE, FunctionDecl *FD); 1584 1585 /// Helpers for dealing with blocks and functions. 1586 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1587 bool CheckParameterNames); 1588 void CheckCXXDefaultArguments(FunctionDecl *FD); 1589 void CheckExtraCXXDefaultArguments(Declarator &D); 1590 Scope *getNonFieldDeclScope(Scope *S); 1591 1592 /// \name Name lookup 1593 /// 1594 /// These routines provide name lookup that is used during semantic 1595 /// analysis to resolve the various kinds of names (identifiers, 1596 /// overloaded operator names, constructor names, etc.) into zero or 1597 /// more declarations within a particular scope. The major entry 1598 /// points are LookupName, which performs unqualified name lookup, 1599 /// and LookupQualifiedName, which performs qualified name lookup. 1600 /// 1601 /// All name lookup is performed based on some specific criteria, 1602 /// which specify what names will be visible to name lookup and how 1603 /// far name lookup should work. These criteria are important both 1604 /// for capturing language semantics (certain lookups will ignore 1605 /// certain names, for example) and for performance, since name 1606 /// lookup is often a bottleneck in the compilation of C++. Name 1607 /// lookup criteria is specified via the LookupCriteria enumeration. 1608 /// 1609 /// The results of name lookup can vary based on the kind of name 1610 /// lookup performed, the current language, and the translation 1611 /// unit. In C, for example, name lookup will either return nothing 1612 /// (no entity found) or a single declaration. In C++, name lookup 1613 /// can additionally refer to a set of overloaded functions or 1614 /// result in an ambiguity. All of the possible results of name 1615 /// lookup are captured by the LookupResult class, which provides 1616 /// the ability to distinguish among them. 1617 //@{ 1618 1619 /// @brief Describes the kind of name lookup to perform. 1620 enum LookupNameKind { 1621 /// Ordinary name lookup, which finds ordinary names (functions, 1622 /// variables, typedefs, etc.) in C and most kinds of names 1623 /// (functions, variables, members, types, etc.) in C++. 1624 LookupOrdinaryName = 0, 1625 /// Tag name lookup, which finds the names of enums, classes, 1626 /// structs, and unions. 1627 LookupTagName, 1628 /// Label name lookup. 1629 LookupLabel, 1630 /// Member name lookup, which finds the names of 1631 /// class/struct/union members. 1632 LookupMemberName, 1633 /// Look up of an operator name (e.g., operator+) for use with 1634 /// operator overloading. This lookup is similar to ordinary name 1635 /// lookup, but will ignore any declarations that are class members. 1636 LookupOperatorName, 1637 /// Look up of a name that precedes the '::' scope resolution 1638 /// operator in C++. This lookup completely ignores operator, object, 1639 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1640 LookupNestedNameSpecifierName, 1641 /// Look up a namespace name within a C++ using directive or 1642 /// namespace alias definition, ignoring non-namespace names (C++ 1643 /// [basic.lookup.udir]p1). 1644 LookupNamespaceName, 1645 /// Look up all declarations in a scope with the given name, 1646 /// including resolved using declarations. This is appropriate 1647 /// for checking redeclarations for a using declaration. 1648 LookupUsingDeclName, 1649 /// Look up an ordinary name that is going to be redeclared as a 1650 /// name with linkage. This lookup ignores any declarations that 1651 /// are outside of the current scope unless they have linkage. See 1652 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1653 LookupRedeclarationWithLinkage, 1654 /// Look up the name of an Objective-C protocol. 1655 LookupObjCProtocolName, 1656 /// Look up implicit 'self' parameter of an objective-c method. 1657 LookupObjCImplicitSelfParam, 1658 /// \brief Look up any declaration with any name. 1659 LookupAnyName 1660 }; 1661 1662 /// \brief Specifies whether (or how) name lookup is being performed for a 1663 /// redeclaration (vs. a reference). 1664 enum RedeclarationKind { 1665 /// \brief The lookup is a reference to this name that is not for the 1666 /// purpose of redeclaring the name. 1667 NotForRedeclaration = 0, 1668 /// \brief The lookup results will be used for redeclaration of a name, 1669 /// if an entity by that name already exists. 1670 ForRedeclaration 1671 }; 1672 1673private: 1674 bool CppLookupName(LookupResult &R, Scope *S); 1675 1676 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1677 CXXSpecialMember SM, 1678 bool ConstArg, 1679 bool VolatileArg, 1680 bool RValueThis, 1681 bool ConstThis, 1682 bool VolatileThis); 1683 1684 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1685 // 1686 // The boolean value will be true to indicate that the namespace was loaded 1687 // from an AST/PCH file, or false otherwise. 1688 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1689 1690 /// \brief Whether we have already loaded known namespaces from an extenal 1691 /// source. 1692 bool LoadedExternalKnownNamespaces; 1693 1694public: 1695 /// \brief Look up a name, looking for a single declaration. Return 1696 /// null if the results were absent, ambiguous, or overloaded. 1697 /// 1698 /// It is preferable to use the elaborated form and explicitly handle 1699 /// ambiguity and overloaded. 1700 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1701 SourceLocation Loc, 1702 LookupNameKind NameKind, 1703 RedeclarationKind Redecl 1704 = NotForRedeclaration); 1705 bool LookupName(LookupResult &R, Scope *S, 1706 bool AllowBuiltinCreation = false); 1707 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1708 bool InUnqualifiedLookup = false); 1709 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1710 bool AllowBuiltinCreation = false, 1711 bool EnteringContext = false); 1712 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1713 1714 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1715 QualType T1, QualType T2, 1716 UnresolvedSetImpl &Functions); 1717 1718 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1719 SourceLocation GnuLabelLoc = SourceLocation()); 1720 1721 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1722 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1723 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1724 unsigned Quals, 1725 bool *ConstParam = 0); 1726 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1727 bool RValueThis, unsigned ThisQuals, 1728 bool *ConstParam = 0); 1729 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class); 1730 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, bool RValueThis, 1731 unsigned ThisQuals); 1732 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1733 1734 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1735 Expr **Args, unsigned NumArgs, 1736 ADLResult &Functions, 1737 bool StdNamespaceIsAssociated = false); 1738 1739 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1740 VisibleDeclConsumer &Consumer, 1741 bool IncludeGlobalScope = true); 1742 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1743 VisibleDeclConsumer &Consumer, 1744 bool IncludeGlobalScope = true); 1745 1746 /// \brief The context in which typo-correction occurs. 1747 /// 1748 /// The typo-correction context affects which keywords (if any) are 1749 /// considered when trying to correct for typos. 1750 enum CorrectTypoContext { 1751 /// \brief An unknown context, where any keyword might be valid. 1752 CTC_Unknown, 1753 /// \brief A context where no keywords are used (e.g. we expect an actual 1754 /// name). 1755 CTC_NoKeywords, 1756 /// \brief A context where we're correcting a type name. 1757 CTC_Type, 1758 /// \brief An expression context. 1759 CTC_Expression, 1760 /// \brief A type cast, or anything else that can be followed by a '<'. 1761 CTC_CXXCasts, 1762 /// \brief A member lookup context. 1763 CTC_MemberLookup, 1764 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1765 CTC_ObjCIvarLookup, 1766 /// \brief An Objective-C property lookup context (e.g., self.prop). 1767 CTC_ObjCPropertyLookup, 1768 /// \brief The receiver of an Objective-C message send within an 1769 /// Objective-C method where 'super' is a valid keyword. 1770 CTC_ObjCMessageReceiver 1771 }; 1772 1773 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1774 Sema::LookupNameKind LookupKind, 1775 Scope *S, CXXScopeSpec *SS, 1776 DeclContext *MemberContext = NULL, 1777 bool EnteringContext = false, 1778 CorrectTypoContext CTC = CTC_Unknown, 1779 const ObjCObjectPointerType *OPT = NULL); 1780 1781 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1782 AssociatedNamespaceSet &AssociatedNamespaces, 1783 AssociatedClassSet &AssociatedClasses); 1784 1785 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1786 bool ConsiderLinkage, 1787 bool ExplicitInstantiationOrSpecialization); 1788 1789 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1790 //@} 1791 1792 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1793 SourceLocation IdLoc, 1794 bool TypoCorrection = false); 1795 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1796 Scope *S, bool ForRedeclaration, 1797 SourceLocation Loc); 1798 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1799 Scope *S); 1800 void AddKnownFunctionAttributes(FunctionDecl *FD); 1801 1802 // More parsing and symbol table subroutines. 1803 1804 // Decl attributes - this routine is the top level dispatcher. 1805 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1806 bool NonInheritable = true, bool Inheritable = true); 1807 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1808 bool NonInheritable = true, bool Inheritable = true); 1809 1810 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1811 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1812 bool CheckNoReturnAttr(const AttributeList &attr); 1813 1814 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1815 bool &IncompleteImpl, unsigned DiagID); 1816 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 1817 ObjCMethodDecl *MethodDecl, 1818 bool IsProtocolMethodDecl, 1819 bool IsDeclaration = false); 1820 1821 /// WarnExactTypedMethods - This routine issues a warning if method 1822 /// implementation declaration matches exactly that of its declaration. 1823 void WarnExactTypedMethods(ObjCMethodDecl *Method, 1824 ObjCMethodDecl *MethodDecl, 1825 bool IsProtocolMethodDecl); 1826 1827 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1828 ObjCInterfaceDecl *IDecl); 1829 1830 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1831 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap; 1832 1833 /// CheckProtocolMethodDefs - This routine checks unimplemented 1834 /// methods declared in protocol, and those referenced by it. 1835 /// \param IDecl - Used for checking for methods which may have been 1836 /// inherited. 1837 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1838 ObjCProtocolDecl *PDecl, 1839 bool& IncompleteImpl, 1840 const SelectorSet &InsMap, 1841 const SelectorSet &ClsMap, 1842 ObjCContainerDecl *CDecl); 1843 1844 /// CheckImplementationIvars - This routine checks if the instance variables 1845 /// listed in the implelementation match those listed in the interface. 1846 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1847 ObjCIvarDecl **Fields, unsigned nIvars, 1848 SourceLocation Loc); 1849 1850 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1851 /// remains unimplemented in the class or category @implementation. 1852 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1853 ObjCContainerDecl* IDecl, 1854 bool IncompleteImpl = false); 1855 1856 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1857 /// which must be implemented by this implementation. 1858 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1859 ObjCContainerDecl *CDecl, 1860 const SelectorSet &InsMap); 1861 1862 /// DefaultSynthesizeProperties - This routine default synthesizes all 1863 /// properties which must be synthesized in class's @implementation. 1864 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1865 ObjCInterfaceDecl *IDecl); 1866 void DefaultSynthesizeProperties(Scope *S, Decl *D); 1867 1868 /// CollectImmediateProperties - This routine collects all properties in 1869 /// the class and its conforming protocols; but not those it its super class. 1870 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1871 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1872 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1873 1874 1875 /// LookupPropertyDecl - Looks up a property in the current class and all 1876 /// its protocols. 1877 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1878 IdentifierInfo *II); 1879 1880 /// Called by ActOnProperty to handle @property declarations in 1881 //// class extensions. 1882 Decl *HandlePropertyInClassExtension(Scope *S, 1883 SourceLocation AtLoc, 1884 FieldDeclarator &FD, 1885 Selector GetterSel, 1886 Selector SetterSel, 1887 const bool isAssign, 1888 const bool isReadWrite, 1889 const unsigned Attributes, 1890 bool *isOverridingProperty, 1891 TypeSourceInfo *T, 1892 tok::ObjCKeywordKind MethodImplKind); 1893 1894 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1895 /// handle creating the ObjcPropertyDecl for a category or @interface. 1896 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1897 ObjCContainerDecl *CDecl, 1898 SourceLocation AtLoc, 1899 FieldDeclarator &FD, 1900 Selector GetterSel, 1901 Selector SetterSel, 1902 const bool isAssign, 1903 const bool isReadWrite, 1904 const unsigned Attributes, 1905 TypeSourceInfo *T, 1906 tok::ObjCKeywordKind MethodImplKind, 1907 DeclContext *lexicalDC = 0); 1908 1909 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1910 /// warning) when atomic property has one but not the other user-declared 1911 /// setter or getter. 1912 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1913 ObjCContainerDecl* IDecl); 1914 1915 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 1916 1917 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1918 1919 enum MethodMatchStrategy { 1920 MMS_loose, 1921 MMS_strict 1922 }; 1923 1924 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1925 /// true, or false, accordingly. 1926 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1927 const ObjCMethodDecl *PrevMethod, 1928 MethodMatchStrategy strategy = MMS_strict); 1929 1930 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1931 /// or protocol against those declared in their implementations. 1932 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1933 const SelectorSet &ClsMap, 1934 SelectorSet &InsMapSeen, 1935 SelectorSet &ClsMapSeen, 1936 ObjCImplDecl* IMPDecl, 1937 ObjCContainerDecl* IDecl, 1938 bool &IncompleteImpl, 1939 bool ImmediateClass, 1940 bool WarnExactMatch=false); 1941 1942 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in 1943 /// category matches with those implemented in its primary class and 1944 /// warns each time an exact match is found. 1945 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP); 1946 1947private: 1948 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1949 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1950 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1951 1952 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1953 /// optionally warns if there are multiple signatures. 1954 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1955 bool receiverIdOrClass, 1956 bool warn, bool instance); 1957 1958public: 1959 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1960 /// unit are added to a global pool. This allows us to efficiently associate 1961 /// a selector with a method declaraation for purposes of typechecking 1962 /// messages sent to "id" (where the class of the object is unknown). 1963 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1964 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1965 } 1966 1967 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1968 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1969 AddMethodToGlobalPool(Method, impl, /*instance*/false); 1970 } 1971 1972 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global 1973 /// pool. 1974 void AddAnyMethodToGlobalPool(Decl *D); 1975 1976 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 1977 /// there are multiple signatures. 1978 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 1979 bool receiverIdOrClass=false, 1980 bool warn=true) { 1981 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1982 warn, /*instance*/true); 1983 } 1984 1985 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 1986 /// there are multiple signatures. 1987 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 1988 bool receiverIdOrClass=false, 1989 bool warn=true) { 1990 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1991 warn, /*instance*/false); 1992 } 1993 1994 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 1995 /// implementation. 1996 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 1997 1998 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 1999 /// initialization. 2000 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 2001 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 2002 2003 //===--------------------------------------------------------------------===// 2004 // Statement Parsing Callbacks: SemaStmt.cpp. 2005public: 2006 class FullExprArg { 2007 public: 2008 FullExprArg(Sema &actions) : E(0) { } 2009 2010 // FIXME: The const_cast here is ugly. RValue references would make this 2011 // much nicer (or we could duplicate a bunch of the move semantics 2012 // emulation code from Ownership.h). 2013 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 2014 2015 ExprResult release() { 2016 return move(E); 2017 } 2018 2019 Expr *get() const { return E; } 2020 2021 Expr *operator->() { 2022 return E; 2023 } 2024 2025 private: 2026 // FIXME: No need to make the entire Sema class a friend when it's just 2027 // Sema::MakeFullExpr that needs access to the constructor below. 2028 friend class Sema; 2029 2030 explicit FullExprArg(Expr *expr) : E(expr) {} 2031 2032 Expr *E; 2033 }; 2034 2035 FullExprArg MakeFullExpr(Expr *Arg) { 2036 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 2037 } 2038 2039 StmtResult ActOnExprStmt(FullExprArg Expr); 2040 2041 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 2042 bool HasLeadingEmptyMacro = false); 2043 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 2044 MultiStmtArg Elts, 2045 bool isStmtExpr); 2046 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2047 SourceLocation StartLoc, 2048 SourceLocation EndLoc); 2049 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2050 StmtResult ActOnForEachLValueExpr(Expr *E); 2051 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2052 SourceLocation DotDotDotLoc, Expr *RHSVal, 2053 SourceLocation ColonLoc); 2054 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2055 2056 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2057 SourceLocation ColonLoc, 2058 Stmt *SubStmt, Scope *CurScope); 2059 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2060 SourceLocation ColonLoc, Stmt *SubStmt); 2061 2062 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2063 FullExprArg CondVal, Decl *CondVar, 2064 Stmt *ThenVal, 2065 SourceLocation ElseLoc, Stmt *ElseVal); 2066 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2067 Expr *Cond, 2068 Decl *CondVar); 2069 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2070 Stmt *Switch, Stmt *Body); 2071 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2072 FullExprArg Cond, 2073 Decl *CondVar, Stmt *Body); 2074 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2075 SourceLocation WhileLoc, 2076 SourceLocation CondLParen, Expr *Cond, 2077 SourceLocation CondRParen); 2078 2079 StmtResult ActOnForStmt(SourceLocation ForLoc, 2080 SourceLocation LParenLoc, 2081 Stmt *First, FullExprArg Second, 2082 Decl *SecondVar, 2083 FullExprArg Third, 2084 SourceLocation RParenLoc, 2085 Stmt *Body); 2086 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc, 2087 Expr *collection); 2088 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2089 SourceLocation LParenLoc, 2090 Stmt *First, Expr *Second, 2091 SourceLocation RParenLoc, Stmt *Body); 2092 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2093 SourceLocation LParenLoc, Stmt *LoopVar, 2094 SourceLocation ColonLoc, Expr *Collection, 2095 SourceLocation RParenLoc); 2096 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2097 SourceLocation ColonLoc, 2098 Stmt *RangeDecl, Stmt *BeginEndDecl, 2099 Expr *Cond, Expr *Inc, 2100 Stmt *LoopVarDecl, 2101 SourceLocation RParenLoc); 2102 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2103 2104 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2105 SourceLocation LabelLoc, 2106 LabelDecl *TheDecl); 2107 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2108 SourceLocation StarLoc, 2109 Expr *DestExp); 2110 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2111 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2112 2113 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2114 bool AllowFunctionParameters); 2115 2116 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2117 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2118 2119 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2120 bool IsSimple, bool IsVolatile, 2121 unsigned NumOutputs, unsigned NumInputs, 2122 IdentifierInfo **Names, 2123 MultiExprArg Constraints, 2124 MultiExprArg Exprs, 2125 Expr *AsmString, 2126 MultiExprArg Clobbers, 2127 SourceLocation RParenLoc, 2128 bool MSAsm = false); 2129 2130 2131 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2132 SourceLocation StartLoc, 2133 SourceLocation IdLoc, IdentifierInfo *Id, 2134 bool Invalid = false); 2135 2136 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2137 2138 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2139 Decl *Parm, Stmt *Body); 2140 2141 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2142 2143 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2144 MultiStmtArg Catch, Stmt *Finally); 2145 2146 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2147 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2148 Scope *CurScope); 2149 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, 2150 Expr *operand); 2151 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2152 Expr *SynchExpr, 2153 Stmt *SynchBody); 2154 2155 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2156 2157 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2158 SourceLocation StartLoc, 2159 SourceLocation IdLoc, 2160 IdentifierInfo *Id); 2161 2162 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2163 2164 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2165 Decl *ExDecl, Stmt *HandlerBlock); 2166 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2167 MultiStmtArg Handlers); 2168 2169 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2170 SourceLocation TryLoc, 2171 Stmt *TryBlock, 2172 Stmt *Handler); 2173 2174 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2175 Expr *FilterExpr, 2176 Stmt *Block); 2177 2178 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2179 Stmt *Block); 2180 2181 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2182 2183 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2184 2185 /// \brief If it's a file scoped decl that must warn if not used, keep track 2186 /// of it. 2187 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2188 2189 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2190 /// whose result is unused, warn. 2191 void DiagnoseUnusedExprResult(const Stmt *S); 2192 void DiagnoseUnusedDecl(const NamedDecl *ND); 2193 2194 ParsingDeclState PushParsingDeclaration() { 2195 return DelayedDiagnostics.pushParsingDecl(); 2196 } 2197 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2198 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2199 } 2200 2201 typedef ProcessingContextState ParsingClassState; 2202 ParsingClassState PushParsingClass() { 2203 return DelayedDiagnostics.pushContext(); 2204 } 2205 void PopParsingClass(ParsingClassState state) { 2206 DelayedDiagnostics.popContext(state); 2207 } 2208 2209 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2210 SourceLocation Loc, 2211 const ObjCInterfaceDecl *UnknownObjCClass=0); 2212 2213 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2214 2215 bool makeUnavailableInSystemHeader(SourceLocation loc, 2216 StringRef message); 2217 2218 //===--------------------------------------------------------------------===// 2219 // Expression Parsing Callbacks: SemaExpr.cpp. 2220 2221 bool CanUseDecl(NamedDecl *D); 2222 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2223 const ObjCInterfaceDecl *UnknownObjCClass = 0); 2224 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2225 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2226 ObjCMethodDecl *Getter, 2227 SourceLocation Loc); 2228 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2229 Expr **Args, unsigned NumArgs); 2230 2231 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 2232 2233 void PopExpressionEvaluationContext(); 2234 2235 void DiscardCleanupsInEvaluationContext(); 2236 2237 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 2238 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2239 void MarkDeclarationsReferencedInExpr(Expr *E); 2240 2241 /// \brief Figure out if an expression could be turned into a call. 2242 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2243 UnresolvedSetImpl &NonTemplateOverloads); 2244 /// \brief Give notes for a set of overloads. 2245 void NoteOverloads(const UnresolvedSetImpl &Overloads, 2246 const SourceLocation FinalNoteLoc); 2247 2248 /// \brief Conditionally issue a diagnostic based on the current 2249 /// evaluation context. 2250 /// 2251 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2252 /// the function body is parsed, and then do a basic reachability analysis to 2253 /// determine if the statement is reachable. If it is unreachable, the 2254 /// diagnostic will not be emitted. 2255 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement, 2256 const PartialDiagnostic &PD); 2257 2258 // Primary Expressions. 2259 SourceRange getExprRange(Expr *E) const; 2260 2261 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Id, 2262 bool HasTrailingLParen, bool IsAddressOfOperand); 2263 2264 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2265 TemplateArgumentListInfo &Buffer, 2266 DeclarationNameInfo &NameInfo, 2267 const TemplateArgumentListInfo *&TemplateArgs); 2268 2269 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2270 CorrectTypoContext CTC = CTC_Unknown, 2271 TemplateArgumentListInfo *ExplicitTemplateArgs = 0, 2272 Expr **Args = 0, unsigned NumArgs = 0); 2273 2274 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S, 2275 IdentifierInfo *II, 2276 bool AllowBuiltinCreation=false); 2277 2278 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2279 const DeclarationNameInfo &NameInfo, 2280 bool isAddressOfOperand, 2281 const TemplateArgumentListInfo *TemplateArgs); 2282 2283 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2284 ExprValueKind VK, 2285 SourceLocation Loc, 2286 const CXXScopeSpec *SS = 0); 2287 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2288 ExprValueKind VK, 2289 const DeclarationNameInfo &NameInfo, 2290 const CXXScopeSpec *SS = 0); 2291 ExprResult 2292 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2293 SourceLocation nameLoc, 2294 IndirectFieldDecl *indirectField, 2295 Expr *baseObjectExpr = 0, 2296 SourceLocation opLoc = SourceLocation()); 2297 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2298 LookupResult &R, 2299 const TemplateArgumentListInfo *TemplateArgs); 2300 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2301 LookupResult &R, 2302 const TemplateArgumentListInfo *TemplateArgs, 2303 bool IsDefiniteInstance); 2304 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2305 const LookupResult &R, 2306 bool HasTrailingLParen); 2307 2308 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2309 const DeclarationNameInfo &NameInfo); 2310 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2311 const DeclarationNameInfo &NameInfo, 2312 const TemplateArgumentListInfo *TemplateArgs); 2313 2314 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2315 LookupResult &R, 2316 bool NeedsADL); 2317 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2318 const DeclarationNameInfo &NameInfo, 2319 NamedDecl *D); 2320 2321 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2322 ExprResult ActOnNumericConstant(const Token &Tok); 2323 ExprResult ActOnCharacterConstant(const Token &Tok); 2324 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E); 2325 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2326 SourceLocation R, 2327 MultiExprArg Val); 2328 2329 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2330 /// fragments (e.g. "foo" "bar" L"baz"). 2331 ExprResult ActOnStringLiteral(const Token *StringToks, 2332 unsigned NumStringToks); 2333 2334 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2335 SourceLocation DefaultLoc, 2336 SourceLocation RParenLoc, 2337 Expr *ControllingExpr, 2338 MultiTypeArg ArgTypes, 2339 MultiExprArg ArgExprs); 2340 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2341 SourceLocation DefaultLoc, 2342 SourceLocation RParenLoc, 2343 Expr *ControllingExpr, 2344 TypeSourceInfo **Types, 2345 Expr **Exprs, 2346 unsigned NumAssocs); 2347 2348 // Binary/Unary Operators. 'Tok' is the token for the operator. 2349 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2350 Expr *InputExpr); 2351 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2352 UnaryOperatorKind Opc, Expr *Input); 2353 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2354 tok::TokenKind Op, Expr *Input); 2355 2356 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo, 2357 SourceLocation OpLoc, 2358 UnaryExprOrTypeTrait ExprKind, 2359 SourceRange R); 2360 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2361 UnaryExprOrTypeTrait ExprKind); 2362 ExprResult 2363 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2364 UnaryExprOrTypeTrait ExprKind, 2365 bool IsType, void *TyOrEx, 2366 const SourceRange &ArgRange); 2367 2368 ExprResult CheckPlaceholderExpr(Expr *E); 2369 bool CheckVecStepExpr(Expr *E); 2370 2371 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2372 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc, 2373 SourceRange ExprRange, 2374 UnaryExprOrTypeTrait ExprKind); 2375 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2376 SourceLocation OpLoc, 2377 IdentifierInfo &Name, 2378 SourceLocation NameLoc, 2379 SourceLocation RParenLoc); 2380 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2381 tok::TokenKind Kind, Expr *Input); 2382 2383 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2384 Expr *Idx, SourceLocation RLoc); 2385 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2386 Expr *Idx, SourceLocation RLoc); 2387 2388 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2389 SourceLocation OpLoc, bool IsArrow, 2390 CXXScopeSpec &SS, 2391 NamedDecl *FirstQualifierInScope, 2392 const DeclarationNameInfo &NameInfo, 2393 const TemplateArgumentListInfo *TemplateArgs); 2394 2395 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2396 SourceLocation OpLoc, bool IsArrow, 2397 const CXXScopeSpec &SS, 2398 NamedDecl *FirstQualifierInScope, 2399 LookupResult &R, 2400 const TemplateArgumentListInfo *TemplateArgs, 2401 bool SuppressQualifierCheck = false); 2402 2403 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2404 bool &IsArrow, SourceLocation OpLoc, 2405 CXXScopeSpec &SS, 2406 Decl *ObjCImpDecl, 2407 bool HasTemplateArgs); 2408 2409 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2410 const CXXScopeSpec &SS, 2411 const LookupResult &R); 2412 2413 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2414 bool IsArrow, SourceLocation OpLoc, 2415 const CXXScopeSpec &SS, 2416 NamedDecl *FirstQualifierInScope, 2417 const DeclarationNameInfo &NameInfo, 2418 const TemplateArgumentListInfo *TemplateArgs); 2419 2420 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2421 SourceLocation OpLoc, 2422 tok::TokenKind OpKind, 2423 CXXScopeSpec &SS, 2424 UnqualifiedId &Member, 2425 Decl *ObjCImpDecl, 2426 bool HasTrailingLParen); 2427 2428 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2429 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2430 FunctionDecl *FDecl, 2431 const FunctionProtoType *Proto, 2432 Expr **Args, unsigned NumArgs, 2433 SourceLocation RParenLoc); 2434 2435 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2436 /// This provides the location of the left/right parens and a list of comma 2437 /// locations. 2438 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2439 MultiExprArg ArgExprs, SourceLocation RParenLoc, 2440 Expr *ExecConfig = 0); 2441 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2442 SourceLocation LParenLoc, 2443 Expr **Args, unsigned NumArgs, 2444 SourceLocation RParenLoc, 2445 Expr *Config = 0); 2446 2447 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2448 MultiExprArg ExecConfig, 2449 SourceLocation GGGLoc); 2450 2451 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2452 Declarator &D, ParsedType &Ty, 2453 SourceLocation RParenLoc, Expr *CastExpr); 2454 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2455 TypeSourceInfo *Ty, 2456 SourceLocation RParenLoc, 2457 Expr *Op); 2458 2459 /// \brief Build an altivec or OpenCL literal. 2460 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2461 SourceLocation RParenLoc, Expr *E, 2462 TypeSourceInfo *TInfo); 2463 2464 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2465 2466 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2467 ParsedType Ty, 2468 SourceLocation RParenLoc, 2469 Expr *InitExpr); 2470 2471 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2472 TypeSourceInfo *TInfo, 2473 SourceLocation RParenLoc, 2474 Expr *LiteralExpr); 2475 2476 ExprResult ActOnInitList(SourceLocation LBraceLoc, 2477 MultiExprArg InitArgList, 2478 SourceLocation RBraceLoc); 2479 2480 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2481 SourceLocation Loc, 2482 bool GNUSyntax, 2483 ExprResult Init); 2484 2485 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2486 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr); 2487 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2488 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr); 2489 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc, 2490 Expr *LHSExpr, Expr *RHSExpr); 2491 2492 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2493 /// in the case of a the GNU conditional expr extension. 2494 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2495 SourceLocation ColonLoc, 2496 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr); 2497 2498 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2499 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2500 LabelDecl *TheDecl); 2501 2502 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2503 SourceLocation RPLoc); // "({..})" 2504 2505 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2506 struct OffsetOfComponent { 2507 SourceLocation LocStart, LocEnd; 2508 bool isBrackets; // true if [expr], false if .ident 2509 union { 2510 IdentifierInfo *IdentInfo; 2511 Expr *E; 2512 } U; 2513 }; 2514 2515 /// __builtin_offsetof(type, a.b[123][456].c) 2516 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2517 TypeSourceInfo *TInfo, 2518 OffsetOfComponent *CompPtr, 2519 unsigned NumComponents, 2520 SourceLocation RParenLoc); 2521 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2522 SourceLocation BuiltinLoc, 2523 SourceLocation TypeLoc, 2524 ParsedType ParsedArgTy, 2525 OffsetOfComponent *CompPtr, 2526 unsigned NumComponents, 2527 SourceLocation RParenLoc); 2528 2529 // __builtin_choose_expr(constExpr, expr1, expr2) 2530 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2531 Expr *CondExpr, Expr *LHSExpr, 2532 Expr *RHSExpr, SourceLocation RPLoc); 2533 2534 // __builtin_va_arg(expr, type) 2535 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, 2536 SourceLocation RPLoc); 2537 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E, 2538 TypeSourceInfo *TInfo, SourceLocation RPLoc); 2539 2540 // __null 2541 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2542 2543 bool CheckCaseExpression(Expr *E); 2544 2545 bool CheckMicrosoftIfExistsSymbol(CXXScopeSpec &SS, UnqualifiedId &Name); 2546 2547 //===------------------------- "Block" Extension ------------------------===// 2548 2549 /// ActOnBlockStart - This callback is invoked when a block literal is 2550 /// started. 2551 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2552 2553 /// ActOnBlockArguments - This callback allows processing of block arguments. 2554 /// If there are no arguments, this is still invoked. 2555 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2556 2557 /// ActOnBlockError - If there is an error parsing a block, this callback 2558 /// is invoked to pop the information about the block from the action impl. 2559 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2560 2561 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2562 /// literal was successfully completed. ^(int x){...} 2563 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body, 2564 Scope *CurScope); 2565 2566 //===---------------------------- OpenCL Features -----------------------===// 2567 2568 /// __builtin_astype(...) 2569 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, 2570 SourceLocation BuiltinLoc, 2571 SourceLocation RParenLoc); 2572 2573 //===---------------------------- C++ Features --------------------------===// 2574 2575 // Act on C++ namespaces 2576 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2577 SourceLocation NamespaceLoc, 2578 SourceLocation IdentLoc, 2579 IdentifierInfo *Ident, 2580 SourceLocation LBrace, 2581 AttributeList *AttrList); 2582 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2583 2584 NamespaceDecl *getStdNamespace() const; 2585 NamespaceDecl *getOrCreateStdNamespace(); 2586 2587 CXXRecordDecl *getStdBadAlloc() const; 2588 2589 Decl *ActOnUsingDirective(Scope *CurScope, 2590 SourceLocation UsingLoc, 2591 SourceLocation NamespcLoc, 2592 CXXScopeSpec &SS, 2593 SourceLocation IdentLoc, 2594 IdentifierInfo *NamespcName, 2595 AttributeList *AttrList); 2596 2597 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2598 2599 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2600 SourceLocation NamespaceLoc, 2601 SourceLocation AliasLoc, 2602 IdentifierInfo *Alias, 2603 CXXScopeSpec &SS, 2604 SourceLocation IdentLoc, 2605 IdentifierInfo *Ident); 2606 2607 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2608 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2609 const LookupResult &PreviousDecls); 2610 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2611 NamedDecl *Target); 2612 2613 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2614 bool isTypeName, 2615 const CXXScopeSpec &SS, 2616 SourceLocation NameLoc, 2617 const LookupResult &Previous); 2618 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2619 const CXXScopeSpec &SS, 2620 SourceLocation NameLoc); 2621 2622 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2623 SourceLocation UsingLoc, 2624 CXXScopeSpec &SS, 2625 const DeclarationNameInfo &NameInfo, 2626 AttributeList *AttrList, 2627 bool IsInstantiation, 2628 bool IsTypeName, 2629 SourceLocation TypenameLoc); 2630 2631 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2632 2633 Decl *ActOnUsingDeclaration(Scope *CurScope, 2634 AccessSpecifier AS, 2635 bool HasUsingKeyword, 2636 SourceLocation UsingLoc, 2637 CXXScopeSpec &SS, 2638 UnqualifiedId &Name, 2639 AttributeList *AttrList, 2640 bool IsTypeName, 2641 SourceLocation TypenameLoc); 2642 Decl *ActOnAliasDeclaration(Scope *CurScope, 2643 AccessSpecifier AS, 2644 MultiTemplateParamsArg TemplateParams, 2645 SourceLocation UsingLoc, 2646 UnqualifiedId &Name, 2647 TypeResult Type); 2648 2649 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2650 /// ActOnDeclarator, when a C++ direct initializer is present. 2651 /// e.g: "int x(1);" 2652 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2653 SourceLocation LParenLoc, 2654 MultiExprArg Exprs, 2655 SourceLocation RParenLoc, 2656 bool TypeMayContainAuto); 2657 2658 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2659 /// and sets it as the initializer for the the passed in VarDecl. 2660 bool InitializeVarWithConstructor(VarDecl *VD, 2661 CXXConstructorDecl *Constructor, 2662 MultiExprArg Exprs); 2663 2664 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2665 /// including handling of its default argument expressions. 2666 /// 2667 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2668 ExprResult 2669 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2670 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2671 bool RequiresZeroInit, unsigned ConstructKind, 2672 SourceRange ParenRange); 2673 2674 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2675 // the constructor can be elidable? 2676 ExprResult 2677 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2678 CXXConstructorDecl *Constructor, bool Elidable, 2679 MultiExprArg Exprs, bool RequiresZeroInit, 2680 unsigned ConstructKind, 2681 SourceRange ParenRange); 2682 2683 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2684 /// the default expr if needed. 2685 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2686 FunctionDecl *FD, 2687 ParmVarDecl *Param); 2688 2689 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2690 /// constructed variable. 2691 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2692 2693 /// \brief Helper class that collects exception specifications for 2694 /// implicitly-declared special member functions. 2695 class ImplicitExceptionSpecification { 2696 // Pointer to allow copying 2697 ASTContext *Context; 2698 // We order exception specifications thus: 2699 // noexcept is the most restrictive, but is only used in C++0x. 2700 // throw() comes next. 2701 // Then a throw(collected exceptions) 2702 // Finally no specification. 2703 // throw(...) is used instead if any called function uses it. 2704 // 2705 // If this exception specification cannot be known yet (for instance, 2706 // because this is the exception specification for a defaulted default 2707 // constructor and we haven't finished parsing the deferred parts of the 2708 // class yet), the C++0x standard does not specify how to behave. We 2709 // record this as an 'unknown' exception specification, which overrules 2710 // any other specification (even 'none', to keep this rule simple). 2711 ExceptionSpecificationType ComputedEST; 2712 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2713 SmallVector<QualType, 4> Exceptions; 2714 2715 void ClearExceptions() { 2716 ExceptionsSeen.clear(); 2717 Exceptions.clear(); 2718 } 2719 2720 public: 2721 explicit ImplicitExceptionSpecification(ASTContext &Context) 2722 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2723 if (!Context.getLangOptions().CPlusPlus0x) 2724 ComputedEST = EST_DynamicNone; 2725 } 2726 2727 /// \brief Get the computed exception specification type. 2728 ExceptionSpecificationType getExceptionSpecType() const { 2729 assert(ComputedEST != EST_ComputedNoexcept && 2730 "noexcept(expr) should not be a possible result"); 2731 return ComputedEST; 2732 } 2733 2734 /// \brief The number of exceptions in the exception specification. 2735 unsigned size() const { return Exceptions.size(); } 2736 2737 /// \brief The set of exceptions in the exception specification. 2738 const QualType *data() const { return Exceptions.data(); } 2739 2740 /// \brief Integrate another called method into the collected data. 2741 void CalledDecl(CXXMethodDecl *Method); 2742 2743 /// \brief Integrate an invoked expression into the collected data. 2744 void CalledExpr(Expr *E); 2745 2746 /// \brief Specify that the exception specification can't be detemined yet. 2747 void SetDelayed() { 2748 ClearExceptions(); 2749 ComputedEST = EST_Delayed; 2750 } 2751 2752 FunctionProtoType::ExtProtoInfo getEPI() const { 2753 FunctionProtoType::ExtProtoInfo EPI; 2754 EPI.ExceptionSpecType = getExceptionSpecType(); 2755 EPI.NumExceptions = size(); 2756 EPI.Exceptions = data(); 2757 return EPI; 2758 } 2759 }; 2760 2761 /// \brief Determine what sort of exception specification a defaulted 2762 /// copy constructor of a class will have. 2763 ImplicitExceptionSpecification 2764 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2765 2766 /// \brief Determine what sort of exception specification a defaulted 2767 /// default constructor of a class will have, and whether the parameter 2768 /// will be const. 2769 std::pair<ImplicitExceptionSpecification, bool> 2770 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2771 2772 /// \brief Determine what sort of exception specification a defautled 2773 /// copy assignment operator of a class will have, and whether the 2774 /// parameter will be const. 2775 std::pair<ImplicitExceptionSpecification, bool> 2776 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2777 2778 /// \brief Determine what sort of exception specification a defaulted move 2779 /// constructor of a class will have. 2780 ImplicitExceptionSpecification 2781 ComputeDefaultedMoveCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2782 2783 /// \brief Determine what sort of exception specification a defaulted move 2784 /// assignment operator of a class will have. 2785 ImplicitExceptionSpecification 2786 ComputeDefaultedMoveAssignmentExceptionSpec(CXXRecordDecl *ClassDecl); 2787 2788 /// \brief Determine what sort of exception specification a defaulted 2789 /// destructor of a class will have. 2790 ImplicitExceptionSpecification 2791 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 2792 2793 /// \brief Determine if a defaulted default constructor ought to be 2794 /// deleted. 2795 bool ShouldDeleteDefaultConstructor(CXXConstructorDecl *CD); 2796 2797 /// \brief Determine if a defaulted copy constructor ought to be 2798 /// deleted. 2799 bool ShouldDeleteCopyConstructor(CXXConstructorDecl *CD); 2800 2801 /// \brief Determine if a defaulted copy assignment operator ought to be 2802 /// deleted. 2803 bool ShouldDeleteCopyAssignmentOperator(CXXMethodDecl *MD); 2804 2805 /// \brief Determine if a defaulted move constructor ought to be deleted. 2806 bool ShouldDeleteMoveConstructor(CXXConstructorDecl *CD); 2807 2808 /// \brief Determine if a defaulted move assignment operator ought to be 2809 /// deleted. 2810 bool ShouldDeleteMoveAssignmentOperator(CXXMethodDecl *MD); 2811 2812 /// \brief Determine if a defaulted destructor ought to be deleted. 2813 bool ShouldDeleteDestructor(CXXDestructorDecl *DD); 2814 2815 /// \brief Declare the implicit default constructor for the given class. 2816 /// 2817 /// \param ClassDecl The class declaration into which the implicit 2818 /// default constructor will be added. 2819 /// 2820 /// \returns The implicitly-declared default constructor. 2821 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2822 CXXRecordDecl *ClassDecl); 2823 2824 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2825 /// defining this constructor as the default constructor. 2826 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2827 CXXConstructorDecl *Constructor); 2828 2829 /// \brief Declare the implicit destructor for the given class. 2830 /// 2831 /// \param ClassDecl The class declaration into which the implicit 2832 /// destructor will be added. 2833 /// 2834 /// \returns The implicitly-declared destructor. 2835 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2836 2837 /// DefineImplicitDestructor - Checks for feasibility of 2838 /// defining this destructor as the default destructor. 2839 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2840 CXXDestructorDecl *Destructor); 2841 2842 /// \brief Build an exception spec for destructors that don't have one. 2843 /// 2844 /// C++11 says that user-defined destructors with no exception spec get one 2845 /// that looks as if the destructor was implicitly declared. 2846 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 2847 CXXDestructorDecl *Destructor); 2848 2849 /// \brief Declare all inherited constructors for the given class. 2850 /// 2851 /// \param ClassDecl The class declaration into which the inherited 2852 /// constructors will be added. 2853 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2854 2855 /// \brief Declare the implicit copy constructor for the given class. 2856 /// 2857 /// \param ClassDecl The class declaration into which the implicit 2858 /// copy constructor will be added. 2859 /// 2860 /// \returns The implicitly-declared copy constructor. 2861 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2862 2863 /// DefineImplicitCopyConstructor - Checks for feasibility of 2864 /// defining this constructor as the copy constructor. 2865 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2866 CXXConstructorDecl *Constructor); 2867 2868 /// \brief Declare the implicit move constructor for the given class. 2869 /// 2870 /// \param ClassDecl The Class declaration into which the implicit 2871 /// move constructor will be added. 2872 /// 2873 /// \returns The implicitly-declared move constructor, or NULL if it wasn't 2874 /// declared. 2875 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl); 2876 2877 /// DefineImplicitMoveConstructor - Checks for feasibility of 2878 /// defining this constructor as the move constructor. 2879 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation, 2880 CXXConstructorDecl *Constructor); 2881 2882 /// \brief Declare the implicit copy assignment operator for the given class. 2883 /// 2884 /// \param ClassDecl The class declaration into which the implicit 2885 /// copy assignment operator will be added. 2886 /// 2887 /// \returns The implicitly-declared copy assignment operator. 2888 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2889 2890 /// \brief Defines an implicitly-declared copy assignment operator. 2891 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2892 CXXMethodDecl *MethodDecl); 2893 2894 /// \brief Declare the implicit move assignment operator for the given class. 2895 /// 2896 /// \param ClassDecl The Class declaration into which the implicit 2897 /// move assignment operator will be added. 2898 /// 2899 /// \returns The implicitly-declared move assignment operator, or NULL if it 2900 /// wasn't declared. 2901 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl); 2902 2903 /// \brief Defines an implicitly-declared move assignment operator. 2904 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation, 2905 CXXMethodDecl *MethodDecl); 2906 2907 /// \brief Force the declaration of any implicitly-declared members of this 2908 /// class. 2909 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2910 2911 /// MaybeBindToTemporary - If the passed in expression has a record type with 2912 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 2913 /// it simply returns the passed in expression. 2914 ExprResult MaybeBindToTemporary(Expr *E); 2915 2916 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 2917 MultiExprArg ArgsPtr, 2918 SourceLocation Loc, 2919 ASTOwningVector<Expr*> &ConvertedArgs); 2920 2921 ParsedType getDestructorName(SourceLocation TildeLoc, 2922 IdentifierInfo &II, SourceLocation NameLoc, 2923 Scope *S, CXXScopeSpec &SS, 2924 ParsedType ObjectType, 2925 bool EnteringContext); 2926 2927 // Checks that reinterpret casts don't have undefined behavior. 2928 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 2929 bool IsDereference, SourceRange Range); 2930 2931 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 2932 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 2933 tok::TokenKind Kind, 2934 SourceLocation LAngleBracketLoc, 2935 Declarator &D, 2936 SourceLocation RAngleBracketLoc, 2937 SourceLocation LParenLoc, 2938 Expr *E, 2939 SourceLocation RParenLoc); 2940 2941 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 2942 tok::TokenKind Kind, 2943 TypeSourceInfo *Ty, 2944 Expr *E, 2945 SourceRange AngleBrackets, 2946 SourceRange Parens); 2947 2948 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2949 SourceLocation TypeidLoc, 2950 TypeSourceInfo *Operand, 2951 SourceLocation RParenLoc); 2952 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2953 SourceLocation TypeidLoc, 2954 Expr *Operand, 2955 SourceLocation RParenLoc); 2956 2957 /// ActOnCXXTypeid - Parse typeid( something ). 2958 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 2959 SourceLocation LParenLoc, bool isType, 2960 void *TyOrExpr, 2961 SourceLocation RParenLoc); 2962 2963 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2964 SourceLocation TypeidLoc, 2965 TypeSourceInfo *Operand, 2966 SourceLocation RParenLoc); 2967 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2968 SourceLocation TypeidLoc, 2969 Expr *Operand, 2970 SourceLocation RParenLoc); 2971 2972 /// ActOnCXXUuidof - Parse __uuidof( something ). 2973 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 2974 SourceLocation LParenLoc, bool isType, 2975 void *TyOrExpr, 2976 SourceLocation RParenLoc); 2977 2978 2979 //// ActOnCXXThis - Parse 'this' pointer. 2980 ExprResult ActOnCXXThis(SourceLocation loc); 2981 2982 /// getAndCaptureCurrentThisType - Try to capture a 'this' pointer. Returns 2983 /// the type of the 'this' pointer, or a null type if this is not possible. 2984 QualType getAndCaptureCurrentThisType(); 2985 2986 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 2987 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 2988 2989 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 2990 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 2991 2992 //// ActOnCXXThrow - Parse throw expressions. 2993 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 2994 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 2995 bool IsThrownVarInScope); 2996 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 2997 bool IsThrownVarInScope); 2998 2999 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 3000 /// Can be interpreted either as function-style casting ("int(x)") 3001 /// or class type construction ("ClassType(x,y,z)") 3002 /// or creation of a value-initialized type ("int()"). 3003 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 3004 SourceLocation LParenLoc, 3005 MultiExprArg Exprs, 3006 SourceLocation RParenLoc); 3007 3008 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 3009 SourceLocation LParenLoc, 3010 MultiExprArg Exprs, 3011 SourceLocation RParenLoc); 3012 3013 /// ActOnCXXNew - Parsed a C++ 'new' expression. 3014 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 3015 SourceLocation PlacementLParen, 3016 MultiExprArg PlacementArgs, 3017 SourceLocation PlacementRParen, 3018 SourceRange TypeIdParens, Declarator &D, 3019 SourceLocation ConstructorLParen, 3020 MultiExprArg ConstructorArgs, 3021 SourceLocation ConstructorRParen); 3022 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 3023 SourceLocation PlacementLParen, 3024 MultiExprArg PlacementArgs, 3025 SourceLocation PlacementRParen, 3026 SourceRange TypeIdParens, 3027 QualType AllocType, 3028 TypeSourceInfo *AllocTypeInfo, 3029 Expr *ArraySize, 3030 SourceLocation ConstructorLParen, 3031 MultiExprArg ConstructorArgs, 3032 SourceLocation ConstructorRParen, 3033 bool TypeMayContainAuto = true); 3034 3035 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 3036 SourceRange R); 3037 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 3038 bool UseGlobal, QualType AllocType, bool IsArray, 3039 Expr **PlaceArgs, unsigned NumPlaceArgs, 3040 FunctionDecl *&OperatorNew, 3041 FunctionDecl *&OperatorDelete); 3042 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 3043 DeclarationName Name, Expr** Args, 3044 unsigned NumArgs, DeclContext *Ctx, 3045 bool AllowMissing, FunctionDecl *&Operator, 3046 bool Diagnose = true); 3047 void DeclareGlobalNewDelete(); 3048 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 3049 QualType Argument, 3050 bool addMallocAttr = false); 3051 3052 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 3053 DeclarationName Name, FunctionDecl* &Operator, 3054 bool Diagnose = true); 3055 3056 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 3057 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 3058 bool UseGlobal, bool ArrayForm, 3059 Expr *Operand); 3060 3061 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 3062 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 3063 SourceLocation StmtLoc, 3064 bool ConvertToBoolean); 3065 3066 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 3067 Expr *Operand, SourceLocation RParen); 3068 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 3069 SourceLocation RParen); 3070 3071 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 3072 /// pseudo-functions. 3073 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 3074 SourceLocation KWLoc, 3075 ParsedType Ty, 3076 SourceLocation RParen); 3077 3078 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3079 SourceLocation KWLoc, 3080 TypeSourceInfo *T, 3081 SourceLocation RParen); 3082 3083 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3084 /// pseudo-functions. 3085 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3086 SourceLocation KWLoc, 3087 ParsedType LhsTy, 3088 ParsedType RhsTy, 3089 SourceLocation RParen); 3090 3091 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3092 SourceLocation KWLoc, 3093 TypeSourceInfo *LhsT, 3094 TypeSourceInfo *RhsT, 3095 SourceLocation RParen); 3096 3097 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3098 /// pseudo-functions. 3099 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3100 SourceLocation KWLoc, 3101 ParsedType LhsTy, 3102 Expr *DimExpr, 3103 SourceLocation RParen); 3104 3105 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3106 SourceLocation KWLoc, 3107 TypeSourceInfo *TSInfo, 3108 Expr *DimExpr, 3109 SourceLocation RParen); 3110 3111 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3112 /// pseudo-functions. 3113 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3114 SourceLocation KWLoc, 3115 Expr *Queried, 3116 SourceLocation RParen); 3117 3118 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3119 SourceLocation KWLoc, 3120 Expr *Queried, 3121 SourceLocation RParen); 3122 3123 ExprResult ActOnStartCXXMemberReference(Scope *S, 3124 Expr *Base, 3125 SourceLocation OpLoc, 3126 tok::TokenKind OpKind, 3127 ParsedType &ObjectType, 3128 bool &MayBePseudoDestructor); 3129 3130 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3131 3132 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3133 SourceLocation OpLoc, 3134 tok::TokenKind OpKind, 3135 const CXXScopeSpec &SS, 3136 TypeSourceInfo *ScopeType, 3137 SourceLocation CCLoc, 3138 SourceLocation TildeLoc, 3139 PseudoDestructorTypeStorage DestroyedType, 3140 bool HasTrailingLParen); 3141 3142 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3143 SourceLocation OpLoc, 3144 tok::TokenKind OpKind, 3145 CXXScopeSpec &SS, 3146 UnqualifiedId &FirstTypeName, 3147 SourceLocation CCLoc, 3148 SourceLocation TildeLoc, 3149 UnqualifiedId &SecondTypeName, 3150 bool HasTrailingLParen); 3151 3152 /// MaybeCreateExprWithCleanups - If the current full-expression 3153 /// requires any cleanups, surround it with a ExprWithCleanups node. 3154 /// Otherwise, just returns the passed-in expression. 3155 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3156 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3157 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3158 3159 ExprResult ActOnFinishFullExpr(Expr *Expr); 3160 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3161 3162 // Marks SS invalid if it represents an incomplete type. 3163 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3164 3165 DeclContext *computeDeclContext(QualType T); 3166 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3167 bool EnteringContext = false); 3168 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3169 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3170 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3171 3172 /// \brief The parser has parsed a global nested-name-specifier '::'. 3173 /// 3174 /// \param S The scope in which this nested-name-specifier occurs. 3175 /// 3176 /// \param CCLoc The location of the '::'. 3177 /// 3178 /// \param SS The nested-name-specifier, which will be updated in-place 3179 /// to reflect the parsed nested-name-specifier. 3180 /// 3181 /// \returns true if an error occurred, false otherwise. 3182 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3183 CXXScopeSpec &SS); 3184 3185 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3186 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3187 3188 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3189 SourceLocation IdLoc, 3190 IdentifierInfo &II, 3191 ParsedType ObjectType); 3192 3193 bool BuildCXXNestedNameSpecifier(Scope *S, 3194 IdentifierInfo &Identifier, 3195 SourceLocation IdentifierLoc, 3196 SourceLocation CCLoc, 3197 QualType ObjectType, 3198 bool EnteringContext, 3199 CXXScopeSpec &SS, 3200 NamedDecl *ScopeLookupResult, 3201 bool ErrorRecoveryLookup); 3202 3203 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3204 /// 3205 /// \param S The scope in which this nested-name-specifier occurs. 3206 /// 3207 /// \param Identifier The identifier preceding the '::'. 3208 /// 3209 /// \param IdentifierLoc The location of the identifier. 3210 /// 3211 /// \param CCLoc The location of the '::'. 3212 /// 3213 /// \param ObjectType The type of the object, if we're parsing 3214 /// nested-name-specifier in a member access expression. 3215 /// 3216 /// \param EnteringContext Whether we're entering the context nominated by 3217 /// this nested-name-specifier. 3218 /// 3219 /// \param SS The nested-name-specifier, which is both an input 3220 /// parameter (the nested-name-specifier before this type) and an 3221 /// output parameter (containing the full nested-name-specifier, 3222 /// including this new type). 3223 /// 3224 /// \returns true if an error occurred, false otherwise. 3225 bool ActOnCXXNestedNameSpecifier(Scope *S, 3226 IdentifierInfo &Identifier, 3227 SourceLocation IdentifierLoc, 3228 SourceLocation CCLoc, 3229 ParsedType ObjectType, 3230 bool EnteringContext, 3231 CXXScopeSpec &SS); 3232 3233 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3234 IdentifierInfo &Identifier, 3235 SourceLocation IdentifierLoc, 3236 SourceLocation ColonLoc, 3237 ParsedType ObjectType, 3238 bool EnteringContext); 3239 3240 /// \brief The parser has parsed a nested-name-specifier 3241 /// 'template[opt] template-name < template-args >::'. 3242 /// 3243 /// \param S The scope in which this nested-name-specifier occurs. 3244 /// 3245 /// \param TemplateLoc The location of the 'template' keyword, if any. 3246 /// 3247 /// \param SS The nested-name-specifier, which is both an input 3248 /// parameter (the nested-name-specifier before this type) and an 3249 /// output parameter (containing the full nested-name-specifier, 3250 /// including this new type). 3251 /// 3252 /// \param TemplateLoc the location of the 'template' keyword, if any. 3253 /// \param TemplateName The template name. 3254 /// \param TemplateNameLoc The location of the template name. 3255 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3256 /// \param TemplateArgs The template arguments. 3257 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3258 /// \param CCLoc The location of the '::'. 3259 3260 /// \param EnteringContext Whether we're entering the context of the 3261 /// nested-name-specifier. 3262 /// 3263 /// 3264 /// \returns true if an error occurred, false otherwise. 3265 bool ActOnCXXNestedNameSpecifier(Scope *S, 3266 SourceLocation TemplateLoc, 3267 CXXScopeSpec &SS, 3268 TemplateTy Template, 3269 SourceLocation TemplateNameLoc, 3270 SourceLocation LAngleLoc, 3271 ASTTemplateArgsPtr TemplateArgs, 3272 SourceLocation RAngleLoc, 3273 SourceLocation CCLoc, 3274 bool EnteringContext); 3275 3276 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3277 /// that the parser can use later to reconstruct the given 3278 /// nested-name-specifier. 3279 /// 3280 /// \param SS A nested-name-specifier. 3281 /// 3282 /// \returns A pointer containing all of the information in the 3283 /// nested-name-specifier \p SS. 3284 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3285 3286 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3287 /// the nested-name-specifier structure. 3288 /// 3289 /// \param Annotation The annotation pointer, produced by 3290 /// \c SaveNestedNameSpecifierAnnotation(). 3291 /// 3292 /// \param AnnotationRange The source range corresponding to the annotation. 3293 /// 3294 /// \param SS The nested-name-specifier that will be updated with the contents 3295 /// of the annotation pointer. 3296 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3297 SourceRange AnnotationRange, 3298 CXXScopeSpec &SS); 3299 3300 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3301 3302 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3303 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3304 /// After this method is called, according to [C++ 3.4.3p3], names should be 3305 /// looked up in the declarator-id's scope, until the declarator is parsed and 3306 /// ActOnCXXExitDeclaratorScope is called. 3307 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3308 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3309 3310 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3311 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3312 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3313 /// Used to indicate that names should revert to being looked up in the 3314 /// defining scope. 3315 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3316 3317 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3318 /// initializer for the declaration 'Dcl'. 3319 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3320 /// static data member of class X, names should be looked up in the scope of 3321 /// class X. 3322 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3323 3324 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3325 /// initializer for the declaration 'Dcl'. 3326 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3327 3328 // ParseObjCStringLiteral - Parse Objective-C string literals. 3329 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3330 Expr **Strings, 3331 unsigned NumStrings); 3332 3333 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3334 TypeSourceInfo *EncodedTypeInfo, 3335 SourceLocation RParenLoc); 3336 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3337 CXXMethodDecl *Method); 3338 3339 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3340 SourceLocation EncodeLoc, 3341 SourceLocation LParenLoc, 3342 ParsedType Ty, 3343 SourceLocation RParenLoc); 3344 3345 // ParseObjCSelectorExpression - Build selector expression for @selector 3346 ExprResult ParseObjCSelectorExpression(Selector Sel, 3347 SourceLocation AtLoc, 3348 SourceLocation SelLoc, 3349 SourceLocation LParenLoc, 3350 SourceLocation RParenLoc); 3351 3352 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3353 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3354 SourceLocation AtLoc, 3355 SourceLocation ProtoLoc, 3356 SourceLocation LParenLoc, 3357 SourceLocation RParenLoc); 3358 3359 //===--------------------------------------------------------------------===// 3360 // C++ Declarations 3361 // 3362 Decl *ActOnStartLinkageSpecification(Scope *S, 3363 SourceLocation ExternLoc, 3364 SourceLocation LangLoc, 3365 StringRef Lang, 3366 SourceLocation LBraceLoc); 3367 Decl *ActOnFinishLinkageSpecification(Scope *S, 3368 Decl *LinkageSpec, 3369 SourceLocation RBraceLoc); 3370 3371 3372 //===--------------------------------------------------------------------===// 3373 // C++ Classes 3374 // 3375 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3376 const CXXScopeSpec *SS = 0); 3377 3378 Decl *ActOnAccessSpecifier(AccessSpecifier Access, 3379 SourceLocation ASLoc, 3380 SourceLocation ColonLoc); 3381 3382 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3383 Declarator &D, 3384 MultiTemplateParamsArg TemplateParameterLists, 3385 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3386 Expr *Init, bool HasDeferredInit, 3387 bool IsDefinition); 3388 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3389 Expr *Init); 3390 3391 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3392 Scope *S, 3393 CXXScopeSpec &SS, 3394 IdentifierInfo *MemberOrBase, 3395 ParsedType TemplateTypeTy, 3396 SourceLocation IdLoc, 3397 SourceLocation LParenLoc, 3398 Expr **Args, unsigned NumArgs, 3399 SourceLocation RParenLoc, 3400 SourceLocation EllipsisLoc); 3401 3402 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3403 Scope *S, 3404 CXXScopeSpec &SS, 3405 IdentifierInfo *MemberOrBase, 3406 ParsedType TemplateTypeTy, 3407 SourceLocation IdLoc, 3408 Expr *InitList, 3409 SourceLocation EllipsisLoc); 3410 3411 MemInitResult BuildMemInitializer(Decl *ConstructorD, 3412 Scope *S, 3413 CXXScopeSpec &SS, 3414 IdentifierInfo *MemberOrBase, 3415 ParsedType TemplateTypeTy, 3416 SourceLocation IdLoc, 3417 const MultiInitializer &Init, 3418 SourceLocation EllipsisLoc); 3419 3420 MemInitResult BuildMemberInitializer(ValueDecl *Member, 3421 const MultiInitializer &Args, 3422 SourceLocation IdLoc); 3423 3424 MemInitResult BuildBaseInitializer(QualType BaseType, 3425 TypeSourceInfo *BaseTInfo, 3426 const MultiInitializer &Args, 3427 CXXRecordDecl *ClassDecl, 3428 SourceLocation EllipsisLoc); 3429 3430 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3431 const MultiInitializer &Args, 3432 SourceLocation BaseLoc, 3433 CXXRecordDecl *ClassDecl); 3434 3435 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3436 CXXCtorInitializer *Initializer); 3437 3438 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3439 CXXCtorInitializer **Initializers, 3440 unsigned NumInitializers, bool AnyErrors); 3441 3442 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3443 3444 3445 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3446 /// mark all the non-trivial destructors of its members and bases as 3447 /// referenced. 3448 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3449 CXXRecordDecl *Record); 3450 3451 /// \brief The list of classes whose vtables have been used within 3452 /// this translation unit, and the source locations at which the 3453 /// first use occurred. 3454 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3455 3456 /// \brief The list of vtables that are required but have not yet been 3457 /// materialized. 3458 SmallVector<VTableUse, 16> VTableUses; 3459 3460 /// \brief The set of classes whose vtables have been used within 3461 /// this translation unit, and a bit that will be true if the vtable is 3462 /// required to be emitted (otherwise, it should be emitted only if needed 3463 /// by code generation). 3464 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3465 3466 /// \brief Load any externally-stored vtable uses. 3467 void LoadExternalVTableUses(); 3468 3469 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 3470 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 3471 DynamicClassesType; 3472 3473 /// \brief A list of all of the dynamic classes in this translation 3474 /// unit. 3475 DynamicClassesType DynamicClasses; 3476 3477 /// \brief Note that the vtable for the given class was used at the 3478 /// given location. 3479 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3480 bool DefinitionRequired = false); 3481 3482 /// MarkVirtualMembersReferenced - Will mark all members of the given 3483 /// CXXRecordDecl referenced. 3484 void MarkVirtualMembersReferenced(SourceLocation Loc, 3485 const CXXRecordDecl *RD); 3486 3487 /// \brief Define all of the vtables that have been used in this 3488 /// translation unit and reference any virtual members used by those 3489 /// vtables. 3490 /// 3491 /// \returns true if any work was done, false otherwise. 3492 bool DefineUsedVTables(); 3493 3494 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3495 3496 void ActOnMemInitializers(Decl *ConstructorDecl, 3497 SourceLocation ColonLoc, 3498 CXXCtorInitializer **MemInits, 3499 unsigned NumMemInits, 3500 bool AnyErrors); 3501 3502 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3503 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3504 Decl *TagDecl, 3505 SourceLocation LBrac, 3506 SourceLocation RBrac, 3507 AttributeList *AttrList); 3508 3509 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3510 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3511 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3512 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3513 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3514 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3515 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3516 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3517 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3518 bool IsInsideALocalClassWithinATemplateFunction(); 3519 3520 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3521 Expr *AssertExpr, 3522 Expr *AssertMessageExpr, 3523 SourceLocation RParenLoc); 3524 3525 FriendDecl *CheckFriendTypeDecl(SourceLocation FriendLoc, 3526 TypeSourceInfo *TSInfo); 3527 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3528 MultiTemplateParamsArg TemplateParams); 3529 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, bool IsDefinition, 3530 MultiTemplateParamsArg TemplateParams); 3531 3532 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3533 StorageClass& SC); 3534 void CheckConstructor(CXXConstructorDecl *Constructor); 3535 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3536 StorageClass& SC); 3537 bool CheckDestructor(CXXDestructorDecl *Destructor); 3538 void CheckConversionDeclarator(Declarator &D, QualType &R, 3539 StorageClass& SC); 3540 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3541 3542 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3543 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3544 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3545 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3546 void CheckExplicitlyDefaultedMoveConstructor(CXXConstructorDecl *Ctor); 3547 void CheckExplicitlyDefaultedMoveAssignment(CXXMethodDecl *Method); 3548 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3549 3550 //===--------------------------------------------------------------------===// 3551 // C++ Derived Classes 3552 // 3553 3554 /// ActOnBaseSpecifier - Parsed a base specifier 3555 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3556 SourceRange SpecifierRange, 3557 bool Virtual, AccessSpecifier Access, 3558 TypeSourceInfo *TInfo, 3559 SourceLocation EllipsisLoc); 3560 3561 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3562 SourceRange SpecifierRange, 3563 bool Virtual, AccessSpecifier Access, 3564 ParsedType basetype, 3565 SourceLocation BaseLoc, 3566 SourceLocation EllipsisLoc); 3567 3568 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3569 unsigned NumBases); 3570 void ActOnBaseSpecifiers(Decl *ClassDecl, CXXBaseSpecifier **Bases, 3571 unsigned NumBases); 3572 3573 bool IsDerivedFrom(QualType Derived, QualType Base); 3574 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3575 3576 // FIXME: I don't like this name. 3577 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3578 3579 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3580 3581 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3582 SourceLocation Loc, SourceRange Range, 3583 CXXCastPath *BasePath = 0, 3584 bool IgnoreAccess = false); 3585 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3586 unsigned InaccessibleBaseID, 3587 unsigned AmbigiousBaseConvID, 3588 SourceLocation Loc, SourceRange Range, 3589 DeclarationName Name, 3590 CXXCastPath *BasePath); 3591 3592 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3593 3594 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3595 /// covariant, according to C++ [class.virtual]p5. 3596 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3597 const CXXMethodDecl *Old); 3598 3599 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3600 /// spec is a subset of base spec. 3601 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3602 const CXXMethodDecl *Old); 3603 3604 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3605 3606 /// CheckOverrideControl - Check C++0x override control semantics. 3607 void CheckOverrideControl(const Decl *D); 3608 3609 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3610 /// overrides a virtual member function marked 'final', according to 3611 /// C++0x [class.virtual]p3. 3612 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3613 const CXXMethodDecl *Old); 3614 3615 3616 //===--------------------------------------------------------------------===// 3617 // C++ Access Control 3618 // 3619 3620 enum AccessResult { 3621 AR_accessible, 3622 AR_inaccessible, 3623 AR_dependent, 3624 AR_delayed 3625 }; 3626 3627 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3628 NamedDecl *PrevMemberDecl, 3629 AccessSpecifier LexicalAS); 3630 3631 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3632 DeclAccessPair FoundDecl); 3633 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3634 DeclAccessPair FoundDecl); 3635 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3636 SourceRange PlacementRange, 3637 CXXRecordDecl *NamingClass, 3638 DeclAccessPair FoundDecl, 3639 bool Diagnose = true); 3640 AccessResult CheckConstructorAccess(SourceLocation Loc, 3641 CXXConstructorDecl *D, 3642 const InitializedEntity &Entity, 3643 AccessSpecifier Access, 3644 bool IsCopyBindingRefToTemp = false); 3645 AccessResult CheckConstructorAccess(SourceLocation Loc, 3646 CXXConstructorDecl *D, 3647 AccessSpecifier Access, 3648 PartialDiagnostic PD); 3649 AccessResult CheckDestructorAccess(SourceLocation Loc, 3650 CXXDestructorDecl *Dtor, 3651 const PartialDiagnostic &PDiag); 3652 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3653 NamedDecl *D, 3654 const PartialDiagnostic &PDiag); 3655 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3656 Expr *ObjectExpr, 3657 Expr *ArgExpr, 3658 DeclAccessPair FoundDecl); 3659 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3660 DeclAccessPair FoundDecl); 3661 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3662 QualType Base, QualType Derived, 3663 const CXXBasePath &Path, 3664 unsigned DiagID, 3665 bool ForceCheck = false, 3666 bool ForceUnprivileged = false); 3667 void CheckLookupAccess(const LookupResult &R); 3668 3669 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3670 const MultiLevelTemplateArgumentList &TemplateArgs); 3671 void PerformDependentDiagnostics(const DeclContext *Pattern, 3672 const MultiLevelTemplateArgumentList &TemplateArgs); 3673 3674 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3675 3676 /// A flag to suppress access checking. 3677 bool SuppressAccessChecking; 3678 3679 /// \brief When true, access checking violations are treated as SFINAE 3680 /// failures rather than hard errors. 3681 bool AccessCheckingSFINAE; 3682 3683 void ActOnStartSuppressingAccessChecks(); 3684 void ActOnStopSuppressingAccessChecks(); 3685 3686 enum AbstractDiagSelID { 3687 AbstractNone = -1, 3688 AbstractReturnType, 3689 AbstractParamType, 3690 AbstractVariableType, 3691 AbstractFieldType, 3692 AbstractArrayType 3693 }; 3694 3695 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3696 const PartialDiagnostic &PD); 3697 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3698 3699 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3700 AbstractDiagSelID SelID = AbstractNone); 3701 3702 //===--------------------------------------------------------------------===// 3703 // C++ Overloaded Operators [C++ 13.5] 3704 // 3705 3706 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3707 3708 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3709 3710 //===--------------------------------------------------------------------===// 3711 // C++ Templates [C++ 14] 3712 // 3713 void FilterAcceptableTemplateNames(LookupResult &R); 3714 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3715 3716 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3717 QualType ObjectType, bool EnteringContext, 3718 bool &MemberOfUnknownSpecialization); 3719 3720 TemplateNameKind isTemplateName(Scope *S, 3721 CXXScopeSpec &SS, 3722 bool hasTemplateKeyword, 3723 UnqualifiedId &Name, 3724 ParsedType ObjectType, 3725 bool EnteringContext, 3726 TemplateTy &Template, 3727 bool &MemberOfUnknownSpecialization); 3728 3729 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3730 SourceLocation IILoc, 3731 Scope *S, 3732 const CXXScopeSpec *SS, 3733 TemplateTy &SuggestedTemplate, 3734 TemplateNameKind &SuggestedKind); 3735 3736 bool DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3737 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3738 3739 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3740 SourceLocation EllipsisLoc, 3741 SourceLocation KeyLoc, 3742 IdentifierInfo *ParamName, 3743 SourceLocation ParamNameLoc, 3744 unsigned Depth, unsigned Position, 3745 SourceLocation EqualLoc, 3746 ParsedType DefaultArg); 3747 3748 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3749 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3750 unsigned Depth, 3751 unsigned Position, 3752 SourceLocation EqualLoc, 3753 Expr *DefaultArg); 3754 Decl *ActOnTemplateTemplateParameter(Scope *S, 3755 SourceLocation TmpLoc, 3756 TemplateParameterList *Params, 3757 SourceLocation EllipsisLoc, 3758 IdentifierInfo *ParamName, 3759 SourceLocation ParamNameLoc, 3760 unsigned Depth, 3761 unsigned Position, 3762 SourceLocation EqualLoc, 3763 ParsedTemplateArgument DefaultArg); 3764 3765 TemplateParameterList * 3766 ActOnTemplateParameterList(unsigned Depth, 3767 SourceLocation ExportLoc, 3768 SourceLocation TemplateLoc, 3769 SourceLocation LAngleLoc, 3770 Decl **Params, unsigned NumParams, 3771 SourceLocation RAngleLoc); 3772 3773 /// \brief The context in which we are checking a template parameter 3774 /// list. 3775 enum TemplateParamListContext { 3776 TPC_ClassTemplate, 3777 TPC_FunctionTemplate, 3778 TPC_ClassTemplateMember, 3779 TPC_FriendFunctionTemplate, 3780 TPC_FriendFunctionTemplateDefinition, 3781 TPC_TypeAliasTemplate 3782 }; 3783 3784 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3785 TemplateParameterList *OldParams, 3786 TemplateParamListContext TPC); 3787 TemplateParameterList * 3788 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3789 SourceLocation DeclLoc, 3790 const CXXScopeSpec &SS, 3791 TemplateParameterList **ParamLists, 3792 unsigned NumParamLists, 3793 bool IsFriend, 3794 bool &IsExplicitSpecialization, 3795 bool &Invalid); 3796 3797 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3798 SourceLocation KWLoc, CXXScopeSpec &SS, 3799 IdentifierInfo *Name, SourceLocation NameLoc, 3800 AttributeList *Attr, 3801 TemplateParameterList *TemplateParams, 3802 AccessSpecifier AS, 3803 SourceLocation ModulePrivateLoc, 3804 unsigned NumOuterTemplateParamLists, 3805 TemplateParameterList **OuterTemplateParamLists); 3806 3807 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3808 TemplateArgumentListInfo &Out); 3809 3810 void NoteAllFoundTemplates(TemplateName Name); 3811 3812 QualType CheckTemplateIdType(TemplateName Template, 3813 SourceLocation TemplateLoc, 3814 TemplateArgumentListInfo &TemplateArgs); 3815 3816 TypeResult 3817 ActOnTemplateIdType(CXXScopeSpec &SS, 3818 TemplateTy Template, SourceLocation TemplateLoc, 3819 SourceLocation LAngleLoc, 3820 ASTTemplateArgsPtr TemplateArgs, 3821 SourceLocation RAngleLoc); 3822 3823 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3824 /// such as \c class T::template apply<U>. 3825 /// 3826 /// \param TUK 3827 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3828 TypeSpecifierType TagSpec, 3829 SourceLocation TagLoc, 3830 CXXScopeSpec &SS, 3831 TemplateTy TemplateD, 3832 SourceLocation TemplateLoc, 3833 SourceLocation LAngleLoc, 3834 ASTTemplateArgsPtr TemplateArgsIn, 3835 SourceLocation RAngleLoc); 3836 3837 3838 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3839 LookupResult &R, 3840 bool RequiresADL, 3841 const TemplateArgumentListInfo &TemplateArgs); 3842 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3843 const DeclarationNameInfo &NameInfo, 3844 const TemplateArgumentListInfo &TemplateArgs); 3845 3846 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3847 SourceLocation TemplateKWLoc, 3848 CXXScopeSpec &SS, 3849 UnqualifiedId &Name, 3850 ParsedType ObjectType, 3851 bool EnteringContext, 3852 TemplateTy &Template); 3853 3854 DeclResult 3855 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3856 SourceLocation KWLoc, 3857 SourceLocation ModulePrivateLoc, 3858 CXXScopeSpec &SS, 3859 TemplateTy Template, 3860 SourceLocation TemplateNameLoc, 3861 SourceLocation LAngleLoc, 3862 ASTTemplateArgsPtr TemplateArgs, 3863 SourceLocation RAngleLoc, 3864 AttributeList *Attr, 3865 MultiTemplateParamsArg TemplateParameterLists); 3866 3867 Decl *ActOnTemplateDeclarator(Scope *S, 3868 MultiTemplateParamsArg TemplateParameterLists, 3869 Declarator &D); 3870 3871 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3872 MultiTemplateParamsArg TemplateParameterLists, 3873 Declarator &D); 3874 3875 bool 3876 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3877 TemplateSpecializationKind NewTSK, 3878 NamedDecl *PrevDecl, 3879 TemplateSpecializationKind PrevTSK, 3880 SourceLocation PrevPtOfInstantiation, 3881 bool &SuppressNew); 3882 3883 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3884 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3885 LookupResult &Previous); 3886 3887 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 3888 TemplateArgumentListInfo *ExplicitTemplateArgs, 3889 LookupResult &Previous); 3890 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 3891 3892 DeclResult 3893 ActOnExplicitInstantiation(Scope *S, 3894 SourceLocation ExternLoc, 3895 SourceLocation TemplateLoc, 3896 unsigned TagSpec, 3897 SourceLocation KWLoc, 3898 const CXXScopeSpec &SS, 3899 TemplateTy Template, 3900 SourceLocation TemplateNameLoc, 3901 SourceLocation LAngleLoc, 3902 ASTTemplateArgsPtr TemplateArgs, 3903 SourceLocation RAngleLoc, 3904 AttributeList *Attr); 3905 3906 DeclResult 3907 ActOnExplicitInstantiation(Scope *S, 3908 SourceLocation ExternLoc, 3909 SourceLocation TemplateLoc, 3910 unsigned TagSpec, 3911 SourceLocation KWLoc, 3912 CXXScopeSpec &SS, 3913 IdentifierInfo *Name, 3914 SourceLocation NameLoc, 3915 AttributeList *Attr); 3916 3917 DeclResult ActOnExplicitInstantiation(Scope *S, 3918 SourceLocation ExternLoc, 3919 SourceLocation TemplateLoc, 3920 Declarator &D); 3921 3922 TemplateArgumentLoc 3923 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 3924 SourceLocation TemplateLoc, 3925 SourceLocation RAngleLoc, 3926 Decl *Param, 3927 SmallVectorImpl<TemplateArgument> &Converted); 3928 3929 /// \brief Specifies the context in which a particular template 3930 /// argument is being checked. 3931 enum CheckTemplateArgumentKind { 3932 /// \brief The template argument was specified in the code or was 3933 /// instantiated with some deduced template arguments. 3934 CTAK_Specified, 3935 3936 /// \brief The template argument was deduced via template argument 3937 /// deduction. 3938 CTAK_Deduced, 3939 3940 /// \brief The template argument was deduced from an array bound 3941 /// via template argument deduction. 3942 CTAK_DeducedFromArrayBound 3943 }; 3944 3945 bool CheckTemplateArgument(NamedDecl *Param, 3946 const TemplateArgumentLoc &Arg, 3947 NamedDecl *Template, 3948 SourceLocation TemplateLoc, 3949 SourceLocation RAngleLoc, 3950 unsigned ArgumentPackIndex, 3951 SmallVectorImpl<TemplateArgument> &Converted, 3952 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3953 3954 /// \brief Check that the given template arguments can be be provided to 3955 /// the given template, converting the arguments along the way. 3956 /// 3957 /// \param Template The template to which the template arguments are being 3958 /// provided. 3959 /// 3960 /// \param TemplateLoc The location of the template name in the source. 3961 /// 3962 /// \param TemplateArgs The list of template arguments. If the template is 3963 /// a template template parameter, this function may extend the set of 3964 /// template arguments to also include substituted, defaulted template 3965 /// arguments. 3966 /// 3967 /// \param PartialTemplateArgs True if the list of template arguments is 3968 /// intentionally partial, e.g., because we're checking just the initial 3969 /// set of template arguments. 3970 /// 3971 /// \param Converted Will receive the converted, canonicalized template 3972 /// arguments. 3973 /// 3974 /// \returns True if an error occurred, false otherwise. 3975 bool CheckTemplateArgumentList(TemplateDecl *Template, 3976 SourceLocation TemplateLoc, 3977 TemplateArgumentListInfo &TemplateArgs, 3978 bool PartialTemplateArgs, 3979 SmallVectorImpl<TemplateArgument> &Converted); 3980 3981 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 3982 const TemplateArgumentLoc &Arg, 3983 SmallVectorImpl<TemplateArgument> &Converted); 3984 3985 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 3986 TypeSourceInfo *Arg); 3987 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 3988 TemplateArgument &Converted); 3989 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 3990 QualType InstantiatedParamType, Expr *Arg, 3991 TemplateArgument &Converted, 3992 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3993 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 3994 const TemplateArgumentLoc &Arg); 3995 3996 ExprResult 3997 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 3998 QualType ParamType, 3999 SourceLocation Loc); 4000 ExprResult 4001 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 4002 SourceLocation Loc); 4003 4004 /// \brief Enumeration describing how template parameter lists are compared 4005 /// for equality. 4006 enum TemplateParameterListEqualKind { 4007 /// \brief We are matching the template parameter lists of two templates 4008 /// that might be redeclarations. 4009 /// 4010 /// \code 4011 /// template<typename T> struct X; 4012 /// template<typename T> struct X; 4013 /// \endcode 4014 TPL_TemplateMatch, 4015 4016 /// \brief We are matching the template parameter lists of two template 4017 /// template parameters as part of matching the template parameter lists 4018 /// of two templates that might be redeclarations. 4019 /// 4020 /// \code 4021 /// template<template<int I> class TT> struct X; 4022 /// template<template<int Value> class Other> struct X; 4023 /// \endcode 4024 TPL_TemplateTemplateParmMatch, 4025 4026 /// \brief We are matching the template parameter lists of a template 4027 /// template argument against the template parameter lists of a template 4028 /// template parameter. 4029 /// 4030 /// \code 4031 /// template<template<int Value> class Metafun> struct X; 4032 /// template<int Value> struct integer_c; 4033 /// X<integer_c> xic; 4034 /// \endcode 4035 TPL_TemplateTemplateArgumentMatch 4036 }; 4037 4038 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 4039 TemplateParameterList *Old, 4040 bool Complain, 4041 TemplateParameterListEqualKind Kind, 4042 SourceLocation TemplateArgLoc 4043 = SourceLocation()); 4044 4045 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 4046 4047 /// \brief Called when the parser has parsed a C++ typename 4048 /// specifier, e.g., "typename T::type". 4049 /// 4050 /// \param S The scope in which this typename type occurs. 4051 /// \param TypenameLoc the location of the 'typename' keyword 4052 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4053 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 4054 /// \param IdLoc the location of the identifier. 4055 TypeResult 4056 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4057 const CXXScopeSpec &SS, const IdentifierInfo &II, 4058 SourceLocation IdLoc); 4059 4060 /// \brief Called when the parser has parsed a C++ typename 4061 /// specifier that ends in a template-id, e.g., 4062 /// "typename MetaFun::template apply<T1, T2>". 4063 /// 4064 /// \param S The scope in which this typename type occurs. 4065 /// \param TypenameLoc the location of the 'typename' keyword 4066 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4067 /// \param TemplateLoc the location of the 'template' keyword, if any. 4068 /// \param TemplateName The template name. 4069 /// \param TemplateNameLoc The location of the template name. 4070 /// \param LAngleLoc The location of the opening angle bracket ('<'). 4071 /// \param TemplateArgs The template arguments. 4072 /// \param RAngleLoc The location of the closing angle bracket ('>'). 4073 TypeResult 4074 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4075 const CXXScopeSpec &SS, 4076 SourceLocation TemplateLoc, 4077 TemplateTy Template, 4078 SourceLocation TemplateNameLoc, 4079 SourceLocation LAngleLoc, 4080 ASTTemplateArgsPtr TemplateArgs, 4081 SourceLocation RAngleLoc); 4082 4083 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 4084 SourceLocation KeywordLoc, 4085 NestedNameSpecifierLoc QualifierLoc, 4086 const IdentifierInfo &II, 4087 SourceLocation IILoc); 4088 4089 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 4090 SourceLocation Loc, 4091 DeclarationName Name); 4092 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 4093 4094 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 4095 4096 std::string 4097 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4098 const TemplateArgumentList &Args); 4099 4100 std::string 4101 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4102 const TemplateArgument *Args, 4103 unsigned NumArgs); 4104 4105 //===--------------------------------------------------------------------===// 4106 // C++ Variadic Templates (C++0x [temp.variadic]) 4107 //===--------------------------------------------------------------------===// 4108 4109 /// \brief The context in which an unexpanded parameter pack is 4110 /// being diagnosed. 4111 /// 4112 /// Note that the values of this enumeration line up with the first 4113 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4114 enum UnexpandedParameterPackContext { 4115 /// \brief An arbitrary expression. 4116 UPPC_Expression = 0, 4117 4118 /// \brief The base type of a class type. 4119 UPPC_BaseType, 4120 4121 /// \brief The type of an arbitrary declaration. 4122 UPPC_DeclarationType, 4123 4124 /// \brief The type of a data member. 4125 UPPC_DataMemberType, 4126 4127 /// \brief The size of a bit-field. 4128 UPPC_BitFieldWidth, 4129 4130 /// \brief The expression in a static assertion. 4131 UPPC_StaticAssertExpression, 4132 4133 /// \brief The fixed underlying type of an enumeration. 4134 UPPC_FixedUnderlyingType, 4135 4136 /// \brief The enumerator value. 4137 UPPC_EnumeratorValue, 4138 4139 /// \brief A using declaration. 4140 UPPC_UsingDeclaration, 4141 4142 /// \brief A friend declaration. 4143 UPPC_FriendDeclaration, 4144 4145 /// \brief A declaration qualifier. 4146 UPPC_DeclarationQualifier, 4147 4148 /// \brief An initializer. 4149 UPPC_Initializer, 4150 4151 /// \brief A default argument. 4152 UPPC_DefaultArgument, 4153 4154 /// \brief The type of a non-type template parameter. 4155 UPPC_NonTypeTemplateParameterType, 4156 4157 /// \brief The type of an exception. 4158 UPPC_ExceptionType, 4159 4160 /// \brief Partial specialization. 4161 UPPC_PartialSpecialization 4162 }; 4163 4164 /// \brief If the given type contains an unexpanded parameter pack, 4165 /// diagnose the error. 4166 /// 4167 /// \param Loc The source location where a diagnostc should be emitted. 4168 /// 4169 /// \param T The type that is being checked for unexpanded parameter 4170 /// packs. 4171 /// 4172 /// \returns true if an error occurred, false otherwise. 4173 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4174 UnexpandedParameterPackContext UPPC); 4175 4176 /// \brief If the given expression contains an unexpanded parameter 4177 /// pack, diagnose the error. 4178 /// 4179 /// \param E The expression that is being checked for unexpanded 4180 /// parameter packs. 4181 /// 4182 /// \returns true if an error occurred, false otherwise. 4183 bool DiagnoseUnexpandedParameterPack(Expr *E, 4184 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4185 4186 /// \brief If the given nested-name-specifier contains an unexpanded 4187 /// parameter pack, diagnose the error. 4188 /// 4189 /// \param SS The nested-name-specifier that is being checked for 4190 /// unexpanded parameter packs. 4191 /// 4192 /// \returns true if an error occurred, false otherwise. 4193 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4194 UnexpandedParameterPackContext UPPC); 4195 4196 /// \brief If the given name contains an unexpanded parameter pack, 4197 /// diagnose the error. 4198 /// 4199 /// \param NameInfo The name (with source location information) that 4200 /// is being checked for unexpanded parameter packs. 4201 /// 4202 /// \returns true if an error occurred, false otherwise. 4203 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4204 UnexpandedParameterPackContext UPPC); 4205 4206 /// \brief If the given template name contains an unexpanded parameter pack, 4207 /// diagnose the error. 4208 /// 4209 /// \param Loc The location of the template name. 4210 /// 4211 /// \param Template The template name that is being checked for unexpanded 4212 /// parameter packs. 4213 /// 4214 /// \returns true if an error occurred, false otherwise. 4215 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4216 TemplateName Template, 4217 UnexpandedParameterPackContext UPPC); 4218 4219 /// \brief If the given template argument contains an unexpanded parameter 4220 /// pack, diagnose the error. 4221 /// 4222 /// \param Arg The template argument that is being checked for unexpanded 4223 /// parameter packs. 4224 /// 4225 /// \returns true if an error occurred, false otherwise. 4226 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4227 UnexpandedParameterPackContext UPPC); 4228 4229 /// \brief Collect the set of unexpanded parameter packs within the given 4230 /// template argument. 4231 /// 4232 /// \param Arg The template argument that will be traversed to find 4233 /// unexpanded parameter packs. 4234 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4235 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4236 4237 /// \brief Collect the set of unexpanded parameter packs within the given 4238 /// template argument. 4239 /// 4240 /// \param Arg The template argument that will be traversed to find 4241 /// unexpanded parameter packs. 4242 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4243 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4244 4245 /// \brief Collect the set of unexpanded parameter packs within the given 4246 /// type. 4247 /// 4248 /// \param T The type that will be traversed to find 4249 /// unexpanded parameter packs. 4250 void collectUnexpandedParameterPacks(QualType T, 4251 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4252 4253 /// \brief Collect the set of unexpanded parameter packs within the given 4254 /// type. 4255 /// 4256 /// \param TL The type that will be traversed to find 4257 /// unexpanded parameter packs. 4258 void collectUnexpandedParameterPacks(TypeLoc TL, 4259 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4260 4261 /// \brief Invoked when parsing a template argument followed by an 4262 /// ellipsis, which creates a pack expansion. 4263 /// 4264 /// \param Arg The template argument preceding the ellipsis, which 4265 /// may already be invalid. 4266 /// 4267 /// \param EllipsisLoc The location of the ellipsis. 4268 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4269 SourceLocation EllipsisLoc); 4270 4271 /// \brief Invoked when parsing a type followed by an ellipsis, which 4272 /// creates a pack expansion. 4273 /// 4274 /// \param Type The type preceding the ellipsis, which will become 4275 /// the pattern of the pack expansion. 4276 /// 4277 /// \param EllipsisLoc The location of the ellipsis. 4278 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4279 4280 /// \brief Construct a pack expansion type from the pattern of the pack 4281 /// expansion. 4282 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4283 SourceLocation EllipsisLoc, 4284 llvm::Optional<unsigned> NumExpansions); 4285 4286 /// \brief Construct a pack expansion type from the pattern of the pack 4287 /// expansion. 4288 QualType CheckPackExpansion(QualType Pattern, 4289 SourceRange PatternRange, 4290 SourceLocation EllipsisLoc, 4291 llvm::Optional<unsigned> NumExpansions); 4292 4293 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4294 /// creates a pack expansion. 4295 /// 4296 /// \param Pattern The expression preceding the ellipsis, which will become 4297 /// the pattern of the pack expansion. 4298 /// 4299 /// \param EllipsisLoc The location of the ellipsis. 4300 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4301 4302 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4303 /// creates a pack expansion. 4304 /// 4305 /// \param Pattern The expression preceding the ellipsis, which will become 4306 /// the pattern of the pack expansion. 4307 /// 4308 /// \param EllipsisLoc The location of the ellipsis. 4309 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4310 llvm::Optional<unsigned> NumExpansions); 4311 4312 /// \brief Determine whether we could expand a pack expansion with the 4313 /// given set of parameter packs into separate arguments by repeatedly 4314 /// transforming the pattern. 4315 /// 4316 /// \param EllipsisLoc The location of the ellipsis that identifies the 4317 /// pack expansion. 4318 /// 4319 /// \param PatternRange The source range that covers the entire pattern of 4320 /// the pack expansion. 4321 /// 4322 /// \param Unexpanded The set of unexpanded parameter packs within the 4323 /// pattern. 4324 /// 4325 /// \param NumUnexpanded The number of unexpanded parameter packs in 4326 /// \p Unexpanded. 4327 /// 4328 /// \param ShouldExpand Will be set to \c true if the transformer should 4329 /// expand the corresponding pack expansions into separate arguments. When 4330 /// set, \c NumExpansions must also be set. 4331 /// 4332 /// \param RetainExpansion Whether the caller should add an unexpanded 4333 /// pack expansion after all of the expanded arguments. This is used 4334 /// when extending explicitly-specified template argument packs per 4335 /// C++0x [temp.arg.explicit]p9. 4336 /// 4337 /// \param NumExpansions The number of separate arguments that will be in 4338 /// the expanded form of the corresponding pack expansion. This is both an 4339 /// input and an output parameter, which can be set by the caller if the 4340 /// number of expansions is known a priori (e.g., due to a prior substitution) 4341 /// and will be set by the callee when the number of expansions is known. 4342 /// The callee must set this value when \c ShouldExpand is \c true; it may 4343 /// set this value in other cases. 4344 /// 4345 /// \returns true if an error occurred (e.g., because the parameter packs 4346 /// are to be instantiated with arguments of different lengths), false 4347 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4348 /// must be set. 4349 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4350 SourceRange PatternRange, 4351 llvm::ArrayRef<UnexpandedParameterPack> Unexpanded, 4352 const MultiLevelTemplateArgumentList &TemplateArgs, 4353 bool &ShouldExpand, 4354 bool &RetainExpansion, 4355 llvm::Optional<unsigned> &NumExpansions); 4356 4357 /// \brief Determine the number of arguments in the given pack expansion 4358 /// type. 4359 /// 4360 /// This routine already assumes that the pack expansion type can be 4361 /// expanded and that the number of arguments in the expansion is 4362 /// consistent across all of the unexpanded parameter packs in its pattern. 4363 unsigned getNumArgumentsInExpansion(QualType T, 4364 const MultiLevelTemplateArgumentList &TemplateArgs); 4365 4366 /// \brief Determine whether the given declarator contains any unexpanded 4367 /// parameter packs. 4368 /// 4369 /// This routine is used by the parser to disambiguate function declarators 4370 /// with an ellipsis prior to the ')', e.g., 4371 /// 4372 /// \code 4373 /// void f(T...); 4374 /// \endcode 4375 /// 4376 /// To determine whether we have an (unnamed) function parameter pack or 4377 /// a variadic function. 4378 /// 4379 /// \returns true if the declarator contains any unexpanded parameter packs, 4380 /// false otherwise. 4381 bool containsUnexpandedParameterPacks(Declarator &D); 4382 4383 //===--------------------------------------------------------------------===// 4384 // C++ Template Argument Deduction (C++ [temp.deduct]) 4385 //===--------------------------------------------------------------------===// 4386 4387 /// \brief Describes the result of template argument deduction. 4388 /// 4389 /// The TemplateDeductionResult enumeration describes the result of 4390 /// template argument deduction, as returned from 4391 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4392 /// structure provides additional information about the results of 4393 /// template argument deduction, e.g., the deduced template argument 4394 /// list (if successful) or the specific template parameters or 4395 /// deduced arguments that were involved in the failure. 4396 enum TemplateDeductionResult { 4397 /// \brief Template argument deduction was successful. 4398 TDK_Success = 0, 4399 /// \brief Template argument deduction exceeded the maximum template 4400 /// instantiation depth (which has already been diagnosed). 4401 TDK_InstantiationDepth, 4402 /// \brief Template argument deduction did not deduce a value 4403 /// for every template parameter. 4404 TDK_Incomplete, 4405 /// \brief Template argument deduction produced inconsistent 4406 /// deduced values for the given template parameter. 4407 TDK_Inconsistent, 4408 /// \brief Template argument deduction failed due to inconsistent 4409 /// cv-qualifiers on a template parameter type that would 4410 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4411 /// but were given a non-const "X". 4412 TDK_Underqualified, 4413 /// \brief Substitution of the deduced template argument values 4414 /// resulted in an error. 4415 TDK_SubstitutionFailure, 4416 /// \brief Substitution of the deduced template argument values 4417 /// into a non-deduced context produced a type or value that 4418 /// produces a type that does not match the original template 4419 /// arguments provided. 4420 TDK_NonDeducedMismatch, 4421 /// \brief When performing template argument deduction for a function 4422 /// template, there were too many call arguments. 4423 TDK_TooManyArguments, 4424 /// \brief When performing template argument deduction for a function 4425 /// template, there were too few call arguments. 4426 TDK_TooFewArguments, 4427 /// \brief The explicitly-specified template arguments were not valid 4428 /// template arguments for the given template. 4429 TDK_InvalidExplicitArguments, 4430 /// \brief The arguments included an overloaded function name that could 4431 /// not be resolved to a suitable function. 4432 TDK_FailedOverloadResolution 4433 }; 4434 4435 TemplateDeductionResult 4436 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4437 const TemplateArgumentList &TemplateArgs, 4438 sema::TemplateDeductionInfo &Info); 4439 4440 TemplateDeductionResult 4441 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4442 TemplateArgumentListInfo &ExplicitTemplateArgs, 4443 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4444 SmallVectorImpl<QualType> &ParamTypes, 4445 QualType *FunctionType, 4446 sema::TemplateDeductionInfo &Info); 4447 4448 /// brief A function argument from which we performed template argument 4449 // deduction for a call. 4450 struct OriginalCallArg { 4451 OriginalCallArg(QualType OriginalParamType, 4452 unsigned ArgIdx, 4453 QualType OriginalArgType) 4454 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4455 OriginalArgType(OriginalArgType) { } 4456 4457 QualType OriginalParamType; 4458 unsigned ArgIdx; 4459 QualType OriginalArgType; 4460 }; 4461 4462 TemplateDeductionResult 4463 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4464 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4465 unsigned NumExplicitlySpecified, 4466 FunctionDecl *&Specialization, 4467 sema::TemplateDeductionInfo &Info, 4468 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4469 4470 TemplateDeductionResult 4471 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4472 TemplateArgumentListInfo *ExplicitTemplateArgs, 4473 Expr **Args, unsigned NumArgs, 4474 FunctionDecl *&Specialization, 4475 sema::TemplateDeductionInfo &Info); 4476 4477 TemplateDeductionResult 4478 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4479 TemplateArgumentListInfo *ExplicitTemplateArgs, 4480 QualType ArgFunctionType, 4481 FunctionDecl *&Specialization, 4482 sema::TemplateDeductionInfo &Info); 4483 4484 TemplateDeductionResult 4485 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4486 QualType ToType, 4487 CXXConversionDecl *&Specialization, 4488 sema::TemplateDeductionInfo &Info); 4489 4490 TemplateDeductionResult 4491 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4492 TemplateArgumentListInfo *ExplicitTemplateArgs, 4493 FunctionDecl *&Specialization, 4494 sema::TemplateDeductionInfo &Info); 4495 4496 bool DeduceAutoType(TypeSourceInfo *AutoType, Expr *Initializer, 4497 TypeSourceInfo *&Result); 4498 4499 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4500 FunctionTemplateDecl *FT2, 4501 SourceLocation Loc, 4502 TemplatePartialOrderingContext TPOC, 4503 unsigned NumCallArguments); 4504 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4505 UnresolvedSetIterator SEnd, 4506 TemplatePartialOrderingContext TPOC, 4507 unsigned NumCallArguments, 4508 SourceLocation Loc, 4509 const PartialDiagnostic &NoneDiag, 4510 const PartialDiagnostic &AmbigDiag, 4511 const PartialDiagnostic &CandidateDiag, 4512 bool Complain = true); 4513 4514 ClassTemplatePartialSpecializationDecl * 4515 getMoreSpecializedPartialSpecialization( 4516 ClassTemplatePartialSpecializationDecl *PS1, 4517 ClassTemplatePartialSpecializationDecl *PS2, 4518 SourceLocation Loc); 4519 4520 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4521 bool OnlyDeduced, 4522 unsigned Depth, 4523 SmallVectorImpl<bool> &Used); 4524 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4525 SmallVectorImpl<bool> &Deduced); 4526 4527 //===--------------------------------------------------------------------===// 4528 // C++ Template Instantiation 4529 // 4530 4531 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4532 const TemplateArgumentList *Innermost = 0, 4533 bool RelativeToPrimary = false, 4534 const FunctionDecl *Pattern = 0); 4535 4536 /// \brief A template instantiation that is currently in progress. 4537 struct ActiveTemplateInstantiation { 4538 /// \brief The kind of template instantiation we are performing 4539 enum InstantiationKind { 4540 /// We are instantiating a template declaration. The entity is 4541 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4542 TemplateInstantiation, 4543 4544 /// We are instantiating a default argument for a template 4545 /// parameter. The Entity is the template, and 4546 /// TemplateArgs/NumTemplateArguments provides the template 4547 /// arguments as specified. 4548 /// FIXME: Use a TemplateArgumentList 4549 DefaultTemplateArgumentInstantiation, 4550 4551 /// We are instantiating a default argument for a function. 4552 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4553 /// provides the template arguments as specified. 4554 DefaultFunctionArgumentInstantiation, 4555 4556 /// We are substituting explicit template arguments provided for 4557 /// a function template. The entity is a FunctionTemplateDecl. 4558 ExplicitTemplateArgumentSubstitution, 4559 4560 /// We are substituting template argument determined as part of 4561 /// template argument deduction for either a class template 4562 /// partial specialization or a function template. The 4563 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4564 /// a FunctionTemplateDecl. 4565 DeducedTemplateArgumentSubstitution, 4566 4567 /// We are substituting prior template arguments into a new 4568 /// template parameter. The template parameter itself is either a 4569 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4570 PriorTemplateArgumentSubstitution, 4571 4572 /// We are checking the validity of a default template argument that 4573 /// has been used when naming a template-id. 4574 DefaultTemplateArgumentChecking 4575 } Kind; 4576 4577 /// \brief The point of instantiation within the source code. 4578 SourceLocation PointOfInstantiation; 4579 4580 /// \brief The template (or partial specialization) in which we are 4581 /// performing the instantiation, for substitutions of prior template 4582 /// arguments. 4583 NamedDecl *Template; 4584 4585 /// \brief The entity that is being instantiated. 4586 uintptr_t Entity; 4587 4588 /// \brief The list of template arguments we are substituting, if they 4589 /// are not part of the entity. 4590 const TemplateArgument *TemplateArgs; 4591 4592 /// \brief The number of template arguments in TemplateArgs. 4593 unsigned NumTemplateArgs; 4594 4595 /// \brief The template deduction info object associated with the 4596 /// substitution or checking of explicit or deduced template arguments. 4597 sema::TemplateDeductionInfo *DeductionInfo; 4598 4599 /// \brief The source range that covers the construct that cause 4600 /// the instantiation, e.g., the template-id that causes a class 4601 /// template instantiation. 4602 SourceRange InstantiationRange; 4603 4604 ActiveTemplateInstantiation() 4605 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4606 NumTemplateArgs(0), DeductionInfo(0) {} 4607 4608 /// \brief Determines whether this template is an actual instantiation 4609 /// that should be counted toward the maximum instantiation depth. 4610 bool isInstantiationRecord() const; 4611 4612 friend bool operator==(const ActiveTemplateInstantiation &X, 4613 const ActiveTemplateInstantiation &Y) { 4614 if (X.Kind != Y.Kind) 4615 return false; 4616 4617 if (X.Entity != Y.Entity) 4618 return false; 4619 4620 switch (X.Kind) { 4621 case TemplateInstantiation: 4622 return true; 4623 4624 case PriorTemplateArgumentSubstitution: 4625 case DefaultTemplateArgumentChecking: 4626 if (X.Template != Y.Template) 4627 return false; 4628 4629 // Fall through 4630 4631 case DefaultTemplateArgumentInstantiation: 4632 case ExplicitTemplateArgumentSubstitution: 4633 case DeducedTemplateArgumentSubstitution: 4634 case DefaultFunctionArgumentInstantiation: 4635 return X.TemplateArgs == Y.TemplateArgs; 4636 4637 } 4638 4639 return true; 4640 } 4641 4642 friend bool operator!=(const ActiveTemplateInstantiation &X, 4643 const ActiveTemplateInstantiation &Y) { 4644 return !(X == Y); 4645 } 4646 }; 4647 4648 /// \brief List of active template instantiations. 4649 /// 4650 /// This vector is treated as a stack. As one template instantiation 4651 /// requires another template instantiation, additional 4652 /// instantiations are pushed onto the stack up to a 4653 /// user-configurable limit LangOptions::InstantiationDepth. 4654 SmallVector<ActiveTemplateInstantiation, 16> 4655 ActiveTemplateInstantiations; 4656 4657 /// \brief Whether we are in a SFINAE context that is not associated with 4658 /// template instantiation. 4659 /// 4660 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4661 /// of a template instantiation or template argument deduction. 4662 bool InNonInstantiationSFINAEContext; 4663 4664 /// \brief The number of ActiveTemplateInstantiation entries in 4665 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4666 /// therefore, should not be counted as part of the instantiation depth. 4667 unsigned NonInstantiationEntries; 4668 4669 /// \brief The last template from which a template instantiation 4670 /// error or warning was produced. 4671 /// 4672 /// This value is used to suppress printing of redundant template 4673 /// instantiation backtraces when there are multiple errors in the 4674 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4675 /// to implement it anywhere else. 4676 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4677 4678 /// \brief The current index into pack expansion arguments that will be 4679 /// used for substitution of parameter packs. 4680 /// 4681 /// The pack expansion index will be -1 to indicate that parameter packs 4682 /// should be instantiated as themselves. Otherwise, the index specifies 4683 /// which argument within the parameter pack will be used for substitution. 4684 int ArgumentPackSubstitutionIndex; 4685 4686 /// \brief RAII object used to change the argument pack substitution index 4687 /// within a \c Sema object. 4688 /// 4689 /// See \c ArgumentPackSubstitutionIndex for more information. 4690 class ArgumentPackSubstitutionIndexRAII { 4691 Sema &Self; 4692 int OldSubstitutionIndex; 4693 4694 public: 4695 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4696 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4697 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4698 } 4699 4700 ~ArgumentPackSubstitutionIndexRAII() { 4701 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4702 } 4703 }; 4704 4705 friend class ArgumentPackSubstitutionRAII; 4706 4707 /// \brief The stack of calls expression undergoing template instantiation. 4708 /// 4709 /// The top of this stack is used by a fixit instantiating unresolved 4710 /// function calls to fix the AST to match the textual change it prints. 4711 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4712 4713 /// \brief For each declaration that involved template argument deduction, the 4714 /// set of diagnostics that were suppressed during that template argument 4715 /// deduction. 4716 /// 4717 /// FIXME: Serialize this structure to the AST file. 4718 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 4719 SuppressedDiagnostics; 4720 4721 /// \brief A stack object to be created when performing template 4722 /// instantiation. 4723 /// 4724 /// Construction of an object of type \c InstantiatingTemplate 4725 /// pushes the current instantiation onto the stack of active 4726 /// instantiations. If the size of this stack exceeds the maximum 4727 /// number of recursive template instantiations, construction 4728 /// produces an error and evaluates true. 4729 /// 4730 /// Destruction of this object will pop the named instantiation off 4731 /// the stack. 4732 struct InstantiatingTemplate { 4733 /// \brief Note that we are instantiating a class template, 4734 /// function template, or a member thereof. 4735 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4736 Decl *Entity, 4737 SourceRange InstantiationRange = SourceRange()); 4738 4739 /// \brief Note that we are instantiating a default argument in a 4740 /// template-id. 4741 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4742 TemplateDecl *Template, 4743 const TemplateArgument *TemplateArgs, 4744 unsigned NumTemplateArgs, 4745 SourceRange InstantiationRange = SourceRange()); 4746 4747 /// \brief Note that we are instantiating a default argument in a 4748 /// template-id. 4749 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4750 FunctionTemplateDecl *FunctionTemplate, 4751 const TemplateArgument *TemplateArgs, 4752 unsigned NumTemplateArgs, 4753 ActiveTemplateInstantiation::InstantiationKind Kind, 4754 sema::TemplateDeductionInfo &DeductionInfo, 4755 SourceRange InstantiationRange = SourceRange()); 4756 4757 /// \brief Note that we are instantiating as part of template 4758 /// argument deduction for a class template partial 4759 /// specialization. 4760 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4761 ClassTemplatePartialSpecializationDecl *PartialSpec, 4762 const TemplateArgument *TemplateArgs, 4763 unsigned NumTemplateArgs, 4764 sema::TemplateDeductionInfo &DeductionInfo, 4765 SourceRange InstantiationRange = SourceRange()); 4766 4767 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4768 ParmVarDecl *Param, 4769 const TemplateArgument *TemplateArgs, 4770 unsigned NumTemplateArgs, 4771 SourceRange InstantiationRange = SourceRange()); 4772 4773 /// \brief Note that we are substituting prior template arguments into a 4774 /// non-type or template template parameter. 4775 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4776 NamedDecl *Template, 4777 NonTypeTemplateParmDecl *Param, 4778 const TemplateArgument *TemplateArgs, 4779 unsigned NumTemplateArgs, 4780 SourceRange InstantiationRange); 4781 4782 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4783 NamedDecl *Template, 4784 TemplateTemplateParmDecl *Param, 4785 const TemplateArgument *TemplateArgs, 4786 unsigned NumTemplateArgs, 4787 SourceRange InstantiationRange); 4788 4789 /// \brief Note that we are checking the default template argument 4790 /// against the template parameter for a given template-id. 4791 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4792 TemplateDecl *Template, 4793 NamedDecl *Param, 4794 const TemplateArgument *TemplateArgs, 4795 unsigned NumTemplateArgs, 4796 SourceRange InstantiationRange); 4797 4798 4799 /// \brief Note that we have finished instantiating this template. 4800 void Clear(); 4801 4802 ~InstantiatingTemplate() { Clear(); } 4803 4804 /// \brief Determines whether we have exceeded the maximum 4805 /// recursive template instantiations. 4806 operator bool() const { return Invalid; } 4807 4808 private: 4809 Sema &SemaRef; 4810 bool Invalid; 4811 bool SavedInNonInstantiationSFINAEContext; 4812 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4813 SourceRange InstantiationRange); 4814 4815 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4816 4817 InstantiatingTemplate& 4818 operator=(const InstantiatingTemplate&); // not implemented 4819 }; 4820 4821 void PrintInstantiationStack(); 4822 4823 /// \brief Determines whether we are currently in a context where 4824 /// template argument substitution failures are not considered 4825 /// errors. 4826 /// 4827 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4828 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4829 /// template-deduction context object, which can be used to capture 4830 /// diagnostics that will be suppressed. 4831 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4832 4833 /// \brief RAII class used to determine whether SFINAE has 4834 /// trapped any errors that occur during template argument 4835 /// deduction.` 4836 class SFINAETrap { 4837 Sema &SemaRef; 4838 unsigned PrevSFINAEErrors; 4839 bool PrevInNonInstantiationSFINAEContext; 4840 bool PrevAccessCheckingSFINAE; 4841 4842 public: 4843 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 4844 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 4845 PrevInNonInstantiationSFINAEContext( 4846 SemaRef.InNonInstantiationSFINAEContext), 4847 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 4848 { 4849 if (!SemaRef.isSFINAEContext()) 4850 SemaRef.InNonInstantiationSFINAEContext = true; 4851 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 4852 } 4853 4854 ~SFINAETrap() { 4855 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 4856 SemaRef.InNonInstantiationSFINAEContext 4857 = PrevInNonInstantiationSFINAEContext; 4858 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 4859 } 4860 4861 /// \brief Determine whether any SFINAE errors have been trapped. 4862 bool hasErrorOccurred() const { 4863 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 4864 } 4865 }; 4866 4867 /// \brief The current instantiation scope used to store local 4868 /// variables. 4869 LocalInstantiationScope *CurrentInstantiationScope; 4870 4871 /// \brief The number of typos corrected by CorrectTypo. 4872 unsigned TyposCorrected; 4873 4874 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 4875 UnqualifiedTyposCorrectedMap; 4876 4877 /// \brief A cache containing the results of typo correction for unqualified 4878 /// name lookup. 4879 /// 4880 /// The string is the string that we corrected to (which may be empty, if 4881 /// there was no correction), while the boolean will be true when the 4882 /// string represents a keyword. 4883 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 4884 4885 /// \brief Worker object for performing CFG-based warnings. 4886 sema::AnalysisBasedWarnings AnalysisWarnings; 4887 4888 /// \brief An entity for which implicit template instantiation is required. 4889 /// 4890 /// The source location associated with the declaration is the first place in 4891 /// the source code where the declaration was "used". It is not necessarily 4892 /// the point of instantiation (which will be either before or after the 4893 /// namespace-scope declaration that triggered this implicit instantiation), 4894 /// However, it is the location that diagnostics should generally refer to, 4895 /// because users will need to know what code triggered the instantiation. 4896 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 4897 4898 /// \brief The queue of implicit template instantiations that are required 4899 /// but have not yet been performed. 4900 std::deque<PendingImplicitInstantiation> PendingInstantiations; 4901 4902 /// \brief The queue of implicit template instantiations that are required 4903 /// and must be performed within the current local scope. 4904 /// 4905 /// This queue is only used for member functions of local classes in 4906 /// templates, which must be instantiated in the same scope as their 4907 /// enclosing function, so that they can reference function-local 4908 /// types, static variables, enumerators, etc. 4909 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 4910 4911 void PerformPendingInstantiations(bool LocalOnly = false); 4912 4913 TypeSourceInfo *SubstType(TypeSourceInfo *T, 4914 const MultiLevelTemplateArgumentList &TemplateArgs, 4915 SourceLocation Loc, DeclarationName Entity); 4916 4917 QualType SubstType(QualType T, 4918 const MultiLevelTemplateArgumentList &TemplateArgs, 4919 SourceLocation Loc, DeclarationName Entity); 4920 4921 TypeSourceInfo *SubstType(TypeLoc TL, 4922 const MultiLevelTemplateArgumentList &TemplateArgs, 4923 SourceLocation Loc, DeclarationName Entity); 4924 4925 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 4926 const MultiLevelTemplateArgumentList &TemplateArgs, 4927 SourceLocation Loc, 4928 DeclarationName Entity); 4929 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 4930 const MultiLevelTemplateArgumentList &TemplateArgs, 4931 int indexAdjustment, 4932 llvm::Optional<unsigned> NumExpansions); 4933 bool SubstParmTypes(SourceLocation Loc, 4934 ParmVarDecl **Params, unsigned NumParams, 4935 const MultiLevelTemplateArgumentList &TemplateArgs, 4936 SmallVectorImpl<QualType> &ParamTypes, 4937 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 4938 ExprResult SubstExpr(Expr *E, 4939 const MultiLevelTemplateArgumentList &TemplateArgs); 4940 4941 /// \brief Substitute the given template arguments into a list of 4942 /// expressions, expanding pack expansions if required. 4943 /// 4944 /// \param Exprs The list of expressions to substitute into. 4945 /// 4946 /// \param NumExprs The number of expressions in \p Exprs. 4947 /// 4948 /// \param IsCall Whether this is some form of call, in which case 4949 /// default arguments will be dropped. 4950 /// 4951 /// \param TemplateArgs The set of template arguments to substitute. 4952 /// 4953 /// \param Outputs Will receive all of the substituted arguments. 4954 /// 4955 /// \returns true if an error occurred, false otherwise. 4956 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 4957 const MultiLevelTemplateArgumentList &TemplateArgs, 4958 SmallVectorImpl<Expr *> &Outputs); 4959 4960 StmtResult SubstStmt(Stmt *S, 4961 const MultiLevelTemplateArgumentList &TemplateArgs); 4962 4963 Decl *SubstDecl(Decl *D, DeclContext *Owner, 4964 const MultiLevelTemplateArgumentList &TemplateArgs); 4965 4966 bool 4967 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 4968 CXXRecordDecl *Pattern, 4969 const MultiLevelTemplateArgumentList &TemplateArgs); 4970 4971 bool 4972 InstantiateClass(SourceLocation PointOfInstantiation, 4973 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 4974 const MultiLevelTemplateArgumentList &TemplateArgs, 4975 TemplateSpecializationKind TSK, 4976 bool Complain = true); 4977 4978 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 4979 const Decl *Pattern, Decl *Inst); 4980 4981 bool 4982 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 4983 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4984 TemplateSpecializationKind TSK, 4985 bool Complain = true); 4986 4987 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 4988 CXXRecordDecl *Instantiation, 4989 const MultiLevelTemplateArgumentList &TemplateArgs, 4990 TemplateSpecializationKind TSK); 4991 4992 void InstantiateClassTemplateSpecializationMembers( 4993 SourceLocation PointOfInstantiation, 4994 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4995 TemplateSpecializationKind TSK); 4996 4997 NestedNameSpecifierLoc 4998 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 4999 const MultiLevelTemplateArgumentList &TemplateArgs); 5000 5001 DeclarationNameInfo 5002 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 5003 const MultiLevelTemplateArgumentList &TemplateArgs); 5004 TemplateName 5005 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 5006 SourceLocation Loc, 5007 const MultiLevelTemplateArgumentList &TemplateArgs); 5008 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 5009 TemplateArgumentListInfo &Result, 5010 const MultiLevelTemplateArgumentList &TemplateArgs); 5011 5012 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 5013 FunctionDecl *Function, 5014 bool Recursive = false, 5015 bool DefinitionRequired = false); 5016 void InstantiateStaticDataMemberDefinition( 5017 SourceLocation PointOfInstantiation, 5018 VarDecl *Var, 5019 bool Recursive = false, 5020 bool DefinitionRequired = false); 5021 5022 void InstantiateMemInitializers(CXXConstructorDecl *New, 5023 const CXXConstructorDecl *Tmpl, 5024 const MultiLevelTemplateArgumentList &TemplateArgs); 5025 bool InstantiateInitializer(Expr *Init, 5026 const MultiLevelTemplateArgumentList &TemplateArgs, 5027 SourceLocation &LParenLoc, 5028 ASTOwningVector<Expr*> &NewArgs, 5029 SourceLocation &RParenLoc); 5030 5031 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 5032 const MultiLevelTemplateArgumentList &TemplateArgs); 5033 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 5034 const MultiLevelTemplateArgumentList &TemplateArgs); 5035 5036 // Objective-C declarations. 5037 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 5038 IdentifierInfo *ClassName, 5039 SourceLocation ClassLoc, 5040 IdentifierInfo *SuperName, 5041 SourceLocation SuperLoc, 5042 Decl * const *ProtoRefs, 5043 unsigned NumProtoRefs, 5044 const SourceLocation *ProtoLocs, 5045 SourceLocation EndProtoLoc, 5046 AttributeList *AttrList); 5047 5048 Decl *ActOnCompatiblityAlias( 5049 SourceLocation AtCompatibilityAliasLoc, 5050 IdentifierInfo *AliasName, SourceLocation AliasLocation, 5051 IdentifierInfo *ClassName, SourceLocation ClassLocation); 5052 5053 bool CheckForwardProtocolDeclarationForCircularDependency( 5054 IdentifierInfo *PName, 5055 SourceLocation &PLoc, SourceLocation PrevLoc, 5056 const ObjCList<ObjCProtocolDecl> &PList); 5057 5058 Decl *ActOnStartProtocolInterface( 5059 SourceLocation AtProtoInterfaceLoc, 5060 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 5061 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 5062 const SourceLocation *ProtoLocs, 5063 SourceLocation EndProtoLoc, 5064 AttributeList *AttrList); 5065 5066 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 5067 IdentifierInfo *ClassName, 5068 SourceLocation ClassLoc, 5069 IdentifierInfo *CategoryName, 5070 SourceLocation CategoryLoc, 5071 Decl * const *ProtoRefs, 5072 unsigned NumProtoRefs, 5073 const SourceLocation *ProtoLocs, 5074 SourceLocation EndProtoLoc); 5075 5076 Decl *ActOnStartClassImplementation( 5077 SourceLocation AtClassImplLoc, 5078 IdentifierInfo *ClassName, SourceLocation ClassLoc, 5079 IdentifierInfo *SuperClassname, 5080 SourceLocation SuperClassLoc); 5081 5082 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 5083 IdentifierInfo *ClassName, 5084 SourceLocation ClassLoc, 5085 IdentifierInfo *CatName, 5086 SourceLocation CatLoc); 5087 5088 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc, 5089 IdentifierInfo **IdentList, 5090 SourceLocation *IdentLocs, 5091 unsigned NumElts); 5092 5093 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 5094 const IdentifierLocPair *IdentList, 5095 unsigned NumElts, 5096 AttributeList *attrList); 5097 5098 void FindProtocolDeclaration(bool WarnOnDeclarations, 5099 const IdentifierLocPair *ProtocolId, 5100 unsigned NumProtocols, 5101 SmallVectorImpl<Decl *> &Protocols); 5102 5103 /// Ensure attributes are consistent with type. 5104 /// \param [in, out] Attributes The attributes to check; they will 5105 /// be modified to be consistent with \arg PropertyTy. 5106 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5107 SourceLocation Loc, 5108 unsigned &Attributes); 5109 5110 /// Process the specified property declaration and create decls for the 5111 /// setters and getters as needed. 5112 /// \param property The property declaration being processed 5113 /// \param DC The semantic container for the property 5114 /// \param redeclaredProperty Declaration for property if redeclared 5115 /// in class extension. 5116 /// \param lexicalDC Container for redeclaredProperty. 5117 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5118 ObjCContainerDecl *DC, 5119 ObjCPropertyDecl *redeclaredProperty = 0, 5120 ObjCContainerDecl *lexicalDC = 0); 5121 5122 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5123 ObjCPropertyDecl *SuperProperty, 5124 const IdentifierInfo *Name); 5125 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5126 5127 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5128 ObjCMethodDecl *MethodDecl, 5129 bool IsInstance); 5130 5131 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5132 5133 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5134 ObjCInterfaceDecl *ID); 5135 5136 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5137 ObjCProtocolDecl *PDecl); 5138 5139 void ActOnAtEnd(Scope *S, SourceRange AtEnd, 5140 Decl **allMethods = 0, unsigned allNum = 0, 5141 Decl **allProperties = 0, unsigned pNum = 0, 5142 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5143 5144 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5145 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5146 Selector GetterSel, Selector SetterSel, 5147 bool *OverridingProperty, 5148 tok::ObjCKeywordKind MethodImplKind, 5149 DeclContext *lexicalDC = 0); 5150 5151 Decl *ActOnPropertyImplDecl(Scope *S, 5152 SourceLocation AtLoc, 5153 SourceLocation PropertyLoc, 5154 bool ImplKind, 5155 IdentifierInfo *PropertyId, 5156 IdentifierInfo *PropertyIvar, 5157 SourceLocation PropertyIvarLoc); 5158 5159 enum ObjCSpecialMethodKind { 5160 OSMK_None, 5161 OSMK_Alloc, 5162 OSMK_New, 5163 OSMK_Copy, 5164 OSMK_RetainingInit, 5165 OSMK_NonRetainingInit 5166 }; 5167 5168 struct ObjCArgInfo { 5169 IdentifierInfo *Name; 5170 SourceLocation NameLoc; 5171 // The Type is null if no type was specified, and the DeclSpec is invalid 5172 // in this case. 5173 ParsedType Type; 5174 ObjCDeclSpec DeclSpec; 5175 5176 /// ArgAttrs - Attribute list for this argument. 5177 AttributeList *ArgAttrs; 5178 }; 5179 5180 Decl *ActOnMethodDeclaration( 5181 Scope *S, 5182 SourceLocation BeginLoc, // location of the + or -. 5183 SourceLocation EndLoc, // location of the ; or {. 5184 tok::TokenKind MethodType, 5185 ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5186 SourceLocation SelectorStartLoc, Selector Sel, 5187 // optional arguments. The number of types/arguments is obtained 5188 // from the Sel.getNumArgs(). 5189 ObjCArgInfo *ArgInfo, 5190 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5191 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5192 bool isVariadic, bool MethodDefinition); 5193 5194 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5195 // Will search "local" class/category implementations for a method decl. 5196 // Will also search in class's root looking for instance method. 5197 // Returns 0 if no method is found. 5198 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5199 ObjCInterfaceDecl *CDecl); 5200 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5201 ObjCInterfaceDecl *ClassDecl); 5202 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5203 const ObjCObjectPointerType *OPT, 5204 bool IsInstance); 5205 5206 bool inferObjCARCLifetime(ValueDecl *decl); 5207 5208 ExprResult 5209 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5210 Expr *BaseExpr, 5211 SourceLocation OpLoc, 5212 DeclarationName MemberName, 5213 SourceLocation MemberLoc, 5214 SourceLocation SuperLoc, QualType SuperType, 5215 bool Super); 5216 5217 ExprResult 5218 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5219 IdentifierInfo &propertyName, 5220 SourceLocation receiverNameLoc, 5221 SourceLocation propertyNameLoc); 5222 5223 ObjCMethodDecl *tryCaptureObjCSelf(); 5224 5225 /// \brief Describes the kind of message expression indicated by a message 5226 /// send that starts with an identifier. 5227 enum ObjCMessageKind { 5228 /// \brief The message is sent to 'super'. 5229 ObjCSuperMessage, 5230 /// \brief The message is an instance message. 5231 ObjCInstanceMessage, 5232 /// \brief The message is a class message, and the identifier is a type 5233 /// name. 5234 ObjCClassMessage 5235 }; 5236 5237 ObjCMessageKind getObjCMessageKind(Scope *S, 5238 IdentifierInfo *Name, 5239 SourceLocation NameLoc, 5240 bool IsSuper, 5241 bool HasTrailingDot, 5242 ParsedType &ReceiverType); 5243 5244 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5245 Selector Sel, 5246 SourceLocation LBracLoc, 5247 SourceLocation SelectorLoc, 5248 SourceLocation RBracLoc, 5249 MultiExprArg Args); 5250 5251 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5252 QualType ReceiverType, 5253 SourceLocation SuperLoc, 5254 Selector Sel, 5255 ObjCMethodDecl *Method, 5256 SourceLocation LBracLoc, 5257 SourceLocation SelectorLoc, 5258 SourceLocation RBracLoc, 5259 MultiExprArg Args); 5260 5261 ExprResult ActOnClassMessage(Scope *S, 5262 ParsedType Receiver, 5263 Selector Sel, 5264 SourceLocation LBracLoc, 5265 SourceLocation SelectorLoc, 5266 SourceLocation RBracLoc, 5267 MultiExprArg Args); 5268 5269 ExprResult BuildInstanceMessage(Expr *Receiver, 5270 QualType ReceiverType, 5271 SourceLocation SuperLoc, 5272 Selector Sel, 5273 ObjCMethodDecl *Method, 5274 SourceLocation LBracLoc, 5275 SourceLocation SelectorLoc, 5276 SourceLocation RBracLoc, 5277 MultiExprArg Args); 5278 5279 ExprResult ActOnInstanceMessage(Scope *S, 5280 Expr *Receiver, 5281 Selector Sel, 5282 SourceLocation LBracLoc, 5283 SourceLocation SelectorLoc, 5284 SourceLocation RBracLoc, 5285 MultiExprArg Args); 5286 5287 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5288 ObjCBridgeCastKind Kind, 5289 SourceLocation BridgeKeywordLoc, 5290 TypeSourceInfo *TSInfo, 5291 Expr *SubExpr); 5292 5293 ExprResult ActOnObjCBridgedCast(Scope *S, 5294 SourceLocation LParenLoc, 5295 ObjCBridgeCastKind Kind, 5296 SourceLocation BridgeKeywordLoc, 5297 ParsedType Type, 5298 SourceLocation RParenLoc, 5299 Expr *SubExpr); 5300 5301 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5302 5303 /// \brief Check whether the given new method is a valid override of the 5304 /// given overridden method, and set any properties that should be inherited. 5305 /// 5306 /// \returns True if an error occurred. 5307 bool CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5308 const ObjCMethodDecl *Overridden, 5309 bool IsImplementation); 5310 5311 /// \brief Check whether the given method overrides any methods in its class, 5312 /// calling \c CheckObjCMethodOverride for each overridden method. 5313 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5314 5315 enum PragmaOptionsAlignKind { 5316 POAK_Native, // #pragma options align=native 5317 POAK_Natural, // #pragma options align=natural 5318 POAK_Packed, // #pragma options align=packed 5319 POAK_Power, // #pragma options align=power 5320 POAK_Mac68k, // #pragma options align=mac68k 5321 POAK_Reset // #pragma options align=reset 5322 }; 5323 5324 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5325 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5326 SourceLocation PragmaLoc, 5327 SourceLocation KindLoc); 5328 5329 enum PragmaPackKind { 5330 PPK_Default, // #pragma pack([n]) 5331 PPK_Show, // #pragma pack(show), only supported by MSVC. 5332 PPK_Push, // #pragma pack(push, [identifier], [n]) 5333 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5334 }; 5335 5336 enum PragmaMSStructKind { 5337 PMSST_OFF, // #pragms ms_struct off 5338 PMSST_ON // #pragms ms_struct on 5339 }; 5340 5341 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5342 void ActOnPragmaPack(PragmaPackKind Kind, 5343 IdentifierInfo *Name, 5344 Expr *Alignment, 5345 SourceLocation PragmaLoc, 5346 SourceLocation LParenLoc, 5347 SourceLocation RParenLoc); 5348 5349 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5350 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5351 5352 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5353 void ActOnPragmaUnused(const Token &Identifier, 5354 Scope *curScope, 5355 SourceLocation PragmaLoc); 5356 5357 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5358 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 5359 SourceLocation PragmaLoc); 5360 5361 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II, 5362 SourceLocation Loc); 5363 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5364 5365 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5366 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5367 SourceLocation PragmaLoc, 5368 SourceLocation WeakNameLoc); 5369 5370 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5371 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5372 IdentifierInfo* AliasName, 5373 SourceLocation PragmaLoc, 5374 SourceLocation WeakNameLoc, 5375 SourceLocation AliasNameLoc); 5376 5377 /// ActOnPragmaFPContract - Called on well formed 5378 /// #pragma {STDC,OPENCL} FP_CONTRACT 5379 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5380 5381 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5382 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5383 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5384 5385 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5386 void AddMsStructLayoutForRecord(RecordDecl *RD); 5387 5388 /// FreePackedContext - Deallocate and null out PackContext. 5389 void FreePackedContext(); 5390 5391 /// PushNamespaceVisibilityAttr - Note that we've entered a 5392 /// namespace with a visibility attribute. 5393 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 5394 5395 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5396 /// add an appropriate visibility attribute. 5397 void AddPushedVisibilityAttribute(Decl *RD); 5398 5399 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5400 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5401 void PopPragmaVisibility(); 5402 5403 /// FreeVisContext - Deallocate and null out VisContext. 5404 void FreeVisContext(); 5405 5406 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5407 void AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E); 5408 void AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *T); 5409 5410 /// CastCategory - Get the correct forwarded implicit cast result category 5411 /// from the inner expression. 5412 ExprValueKind CastCategory(Expr *E); 5413 5414 /// \brief The kind of conversion being performed. 5415 enum CheckedConversionKind { 5416 /// \brief An implicit conversion. 5417 CCK_ImplicitConversion, 5418 /// \brief A C-style cast. 5419 CCK_CStyleCast, 5420 /// \brief A functional-style cast. 5421 CCK_FunctionalCast, 5422 /// \brief A cast other than a C-style cast. 5423 CCK_OtherCast 5424 }; 5425 5426 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5427 /// cast. If there is already an implicit cast, merge into the existing one. 5428 /// If isLvalue, the result of the cast is an lvalue. 5429 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5430 ExprValueKind VK = VK_RValue, 5431 const CXXCastPath *BasePath = 0, 5432 CheckedConversionKind CCK 5433 = CCK_ImplicitConversion); 5434 5435 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5436 /// to the conversion from scalar type ScalarTy to the Boolean type. 5437 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5438 5439 /// IgnoredValueConversions - Given that an expression's result is 5440 /// syntactically ignored, perform any conversions that are 5441 /// required. 5442 ExprResult IgnoredValueConversions(Expr *E); 5443 5444 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5445 // functions and arrays to their respective pointers (C99 6.3.2.1). 5446 ExprResult UsualUnaryConversions(Expr *E); 5447 5448 // DefaultFunctionArrayConversion - converts functions and arrays 5449 // to their respective pointers (C99 6.3.2.1). 5450 ExprResult DefaultFunctionArrayConversion(Expr *E); 5451 5452 // DefaultFunctionArrayLvalueConversion - converts functions and 5453 // arrays to their respective pointers and performs the 5454 // lvalue-to-rvalue conversion. 5455 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5456 5457 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5458 // the operand. This is DefaultFunctionArrayLvalueConversion, 5459 // except that it assumes the operand isn't of function or array 5460 // type. 5461 ExprResult DefaultLvalueConversion(Expr *E); 5462 5463 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5464 // do not have a prototype. Integer promotions are performed on each 5465 // argument, and arguments that have type float are promoted to double. 5466 ExprResult DefaultArgumentPromotion(Expr *E); 5467 5468 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5469 enum VariadicCallType { 5470 VariadicFunction, 5471 VariadicBlock, 5472 VariadicMethod, 5473 VariadicConstructor, 5474 VariadicDoesNotApply 5475 }; 5476 5477 /// GatherArgumentsForCall - Collector argument expressions for various 5478 /// form of call prototypes. 5479 bool GatherArgumentsForCall(SourceLocation CallLoc, 5480 FunctionDecl *FDecl, 5481 const FunctionProtoType *Proto, 5482 unsigned FirstProtoArg, 5483 Expr **Args, unsigned NumArgs, 5484 SmallVector<Expr *, 8> &AllArgs, 5485 VariadicCallType CallType = VariadicDoesNotApply); 5486 5487 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5488 // will warn if the resulting type is not a POD type. 5489 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5490 FunctionDecl *FDecl); 5491 5492 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5493 // operands and then handles various conversions that are common to binary 5494 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5495 // routine returns the first non-arithmetic type found. The client is 5496 // responsible for emitting appropriate error diagnostics. 5497 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS, 5498 bool IsCompAssign = false); 5499 5500 /// AssignConvertType - All of the 'assignment' semantic checks return this 5501 /// enum to indicate whether the assignment was allowed. These checks are 5502 /// done for simple assignments, as well as initialization, return from 5503 /// function, argument passing, etc. The query is phrased in terms of a 5504 /// source and destination type. 5505 enum AssignConvertType { 5506 /// Compatible - the types are compatible according to the standard. 5507 Compatible, 5508 5509 /// PointerToInt - The assignment converts a pointer to an int, which we 5510 /// accept as an extension. 5511 PointerToInt, 5512 5513 /// IntToPointer - The assignment converts an int to a pointer, which we 5514 /// accept as an extension. 5515 IntToPointer, 5516 5517 /// FunctionVoidPointer - The assignment is between a function pointer and 5518 /// void*, which the standard doesn't allow, but we accept as an extension. 5519 FunctionVoidPointer, 5520 5521 /// IncompatiblePointer - The assignment is between two pointers types that 5522 /// are not compatible, but we accept them as an extension. 5523 IncompatiblePointer, 5524 5525 /// IncompatiblePointer - The assignment is between two pointers types which 5526 /// point to integers which have a different sign, but are otherwise identical. 5527 /// This is a subset of the above, but broken out because it's by far the most 5528 /// common case of incompatible pointers. 5529 IncompatiblePointerSign, 5530 5531 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5532 /// c/v/r qualifiers, which we accept as an extension. 5533 CompatiblePointerDiscardsQualifiers, 5534 5535 /// IncompatiblePointerDiscardsQualifiers - The assignment 5536 /// discards qualifiers that we don't permit to be discarded, 5537 /// like address spaces. 5538 IncompatiblePointerDiscardsQualifiers, 5539 5540 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5541 /// nested pointer types, and the qualifiers other than the first two 5542 /// levels differ e.g. char ** -> const char **, but we accept them as an 5543 /// extension. 5544 IncompatibleNestedPointerQualifiers, 5545 5546 /// IncompatibleVectors - The assignment is between two vector types that 5547 /// have the same size, which we accept as an extension. 5548 IncompatibleVectors, 5549 5550 /// IntToBlockPointer - The assignment converts an int to a block 5551 /// pointer. We disallow this. 5552 IntToBlockPointer, 5553 5554 /// IncompatibleBlockPointer - The assignment is between two block 5555 /// pointers types that are not compatible. 5556 IncompatibleBlockPointer, 5557 5558 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5559 /// id type and something else (that is incompatible with it). For example, 5560 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5561 IncompatibleObjCQualifiedId, 5562 5563 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 5564 /// object with __weak qualifier. 5565 IncompatibleObjCWeakRef, 5566 5567 /// Incompatible - We reject this conversion outright, it is invalid to 5568 /// represent it in the AST. 5569 Incompatible 5570 }; 5571 5572 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5573 /// assignment conversion type specified by ConvTy. This returns true if the 5574 /// conversion was invalid or false if the conversion was accepted. 5575 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5576 SourceLocation Loc, 5577 QualType DstType, QualType SrcType, 5578 Expr *SrcExpr, AssignmentAction Action, 5579 bool *Complained = 0); 5580 5581 /// CheckAssignmentConstraints - Perform type checking for assignment, 5582 /// argument passing, variable initialization, and function return values. 5583 /// C99 6.5.16. 5584 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5585 QualType LHSType, 5586 QualType RHSType); 5587 5588 /// Check assignment constraints and prepare for a conversion of the 5589 /// RHS to the LHS type. 5590 AssignConvertType CheckAssignmentConstraints(QualType LHSType, 5591 ExprResult &RHS, 5592 CastKind &Kind); 5593 5594 // CheckSingleAssignmentConstraints - Currently used by 5595 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5596 // this routine performs the default function/array converions. 5597 AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType, 5598 ExprResult &RHS, 5599 bool Diagnose = true); 5600 5601 // \brief If the lhs type is a transparent union, check whether we 5602 // can initialize the transparent union with the given expression. 5603 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType, 5604 ExprResult &RHS); 5605 5606 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5607 5608 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5609 5610 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5611 AssignmentAction Action, 5612 bool AllowExplicit = false, 5613 bool Diagnose = true); 5614 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5615 AssignmentAction Action, 5616 bool AllowExplicit, 5617 ImplicitConversionSequence& ICS, 5618 bool Diagnose = true); 5619 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5620 const ImplicitConversionSequence& ICS, 5621 AssignmentAction Action, 5622 CheckedConversionKind CCK 5623 = CCK_ImplicitConversion); 5624 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5625 const StandardConversionSequence& SCS, 5626 AssignmentAction Action, 5627 CheckedConversionKind CCK); 5628 5629 /// the following "Check" methods will return a valid/converted QualType 5630 /// or a null QualType (indicating an error diagnostic was issued). 5631 5632 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5633 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS, 5634 ExprResult &RHS); 5635 QualType CheckPointerToMemberOperands( // C++ 5.5 5636 ExprResult &LHS, ExprResult &RHS, ExprValueKind &VK, 5637 SourceLocation OpLoc, bool isIndirect); 5638 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5639 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign, 5640 bool IsDivide); 5641 QualType CheckRemainderOperands( // C99 6.5.5 5642 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5643 bool IsCompAssign = false); 5644 QualType CheckAdditionOperands( // C99 6.5.6 5645 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5646 QualType* CompLHSTy = 0); 5647 QualType CheckSubtractionOperands( // C99 6.5.6 5648 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5649 QualType* CompLHSTy = 0); 5650 QualType CheckShiftOperands( // C99 6.5.7 5651 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 5652 bool IsCompAssign = false); 5653 QualType CheckCompareOperands( // C99 6.5.8/9 5654 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned OpaqueOpc, 5655 bool isRelational); 5656 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 5657 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5658 bool IsCompAssign = false); 5659 QualType CheckLogicalOperands( // C99 6.5.[13,14] 5660 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc); 5661 // CheckAssignmentOperands is used for both simple and compound assignment. 5662 // For simple assignment, pass both expressions and a null converted type. 5663 // For compound assignment, pass both expressions and the converted type. 5664 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 5665 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType); 5666 5667 void ConvertPropertyForLValue(ExprResult &LHS, ExprResult &RHS, 5668 QualType& LHSTy); 5669 ExprResult ConvertPropertyForRValue(Expr *E); 5670 5671 QualType CheckConditionalOperands( // C99 6.5.15 5672 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS, 5673 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc); 5674 QualType CXXCheckConditionalOperands( // C++ 5.16 5675 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5676 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5677 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 5678 bool *NonStandardCompositeType = 0); 5679 QualType FindCompositePointerType(SourceLocation Loc, ExprResult &E1, ExprResult &E2, 5680 bool *NonStandardCompositeType = 0) { 5681 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 5682 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, NonStandardCompositeType); 5683 E1 = Owned(E1Tmp); 5684 E2 = Owned(E2Tmp); 5685 return Composite; 5686 } 5687 5688 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5689 SourceLocation QuestionLoc); 5690 5691 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr, 5692 SourceLocation QuestionLoc); 5693 5694 /// type checking for vector binary operators. 5695 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS, 5696 SourceLocation Loc, bool IsCompAssign); 5697 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS, 5698 SourceLocation Loc, bool isRelational); 5699 5700 /// type checking declaration initializers (C99 6.7.8) 5701 bool CheckForConstantInitializer(Expr *e, QualType t); 5702 5703 // type checking C++ declaration initializers (C++ [dcl.init]). 5704 5705 /// ReferenceCompareResult - Expresses the result of comparing two 5706 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5707 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5708 enum ReferenceCompareResult { 5709 /// Ref_Incompatible - The two types are incompatible, so direct 5710 /// reference binding is not possible. 5711 Ref_Incompatible = 0, 5712 /// Ref_Related - The two types are reference-related, which means 5713 /// that their unqualified forms (T1 and T2) are either the same 5714 /// or T1 is a base class of T2. 5715 Ref_Related, 5716 /// Ref_Compatible_With_Added_Qualification - The two types are 5717 /// reference-compatible with added qualification, meaning that 5718 /// they are reference-compatible and the qualifiers on T1 (cv1) 5719 /// are greater than the qualifiers on T2 (cv2). 5720 Ref_Compatible_With_Added_Qualification, 5721 /// Ref_Compatible - The two types are reference-compatible and 5722 /// have equivalent qualifiers (cv1 == cv2). 5723 Ref_Compatible 5724 }; 5725 5726 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 5727 QualType T1, QualType T2, 5728 bool &DerivedToBase, 5729 bool &ObjCConversion, 5730 bool &ObjCLifetimeConversion); 5731 5732 /// CheckCastTypes - Check type constraints for casting between types under 5733 /// C semantics, or forward to CXXCheckCStyleCast in C++. 5734 ExprResult CheckCastTypes(SourceLocation CastStartLoc, SourceRange TypeRange, 5735 QualType CastType, Expr *CastExpr, CastKind &Kind, 5736 ExprValueKind &VK, CXXCastPath &BasePath, 5737 bool FunctionalStyle = false); 5738 5739 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType, 5740 Expr *CastExpr, CastKind &CastKind, 5741 ExprValueKind &VK, CXXCastPath &Path); 5742 5743 // CheckVectorCast - check type constraints for vectors. 5744 // Since vectors are an extension, there are no C standard reference for this. 5745 // We allow casting between vectors and integer datatypes of the same size. 5746 // returns true if the cast is invalid 5747 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 5748 CastKind &Kind); 5749 5750 // CheckExtVectorCast - check type constraints for extended vectors. 5751 // Since vectors are an extension, there are no C standard reference for this. 5752 // We allow casting between vectors and integer datatypes of the same size, 5753 // or vectors and the element type of that vector. 5754 // returns the cast expr 5755 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr, 5756 CastKind &Kind); 5757 5758 /// CXXCheckCStyleCast - Check constraints of a C-style or function-style 5759 /// cast under C++ semantics. 5760 ExprResult CXXCheckCStyleCast(SourceRange R, QualType CastTy, ExprValueKind &VK, 5761 Expr *CastExpr, CastKind &Kind, 5762 CXXCastPath &BasePath, bool FunctionalStyle); 5763 5764 /// \brief Checks for valid expressions which can be cast to an ObjC 5765 /// pointer without needing a bridge cast. 5766 bool ValidObjCARCNoBridgeCastExpr(Expr *&Exp, QualType castType); 5767 5768 /// \brief Checks for invalid conversions and casts between 5769 /// retainable pointers and other pointer kinds. 5770 void CheckObjCARCConversion(SourceRange castRange, QualType castType, 5771 Expr *&op, CheckedConversionKind CCK); 5772 5773 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 5774 QualType ExprType); 5775 5776 /// checkRetainCycles - Check whether an Objective-C message send 5777 /// might create an obvious retain cycle. 5778 void checkRetainCycles(ObjCMessageExpr *msg); 5779 void checkRetainCycles(Expr *receiver, Expr *argument); 5780 5781 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 5782 /// to weak/__unsafe_unretained type. 5783 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 5784 5785 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 5786 /// to weak/__unsafe_unretained expression. 5787 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 5788 5789 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 5790 /// \param Method - May be null. 5791 /// \param [out] ReturnType - The return type of the send. 5792 /// \return true iff there were any incompatible types. 5793 bool CheckMessageArgumentTypes(QualType ReceiverType, 5794 Expr **Args, unsigned NumArgs, Selector Sel, 5795 ObjCMethodDecl *Method, bool isClassMessage, 5796 bool isSuperMessage, 5797 SourceLocation lbrac, SourceLocation rbrac, 5798 QualType &ReturnType, ExprValueKind &VK); 5799 5800 /// \brief Determine the result of a message send expression based on 5801 /// the type of the receiver, the method expected to receive the message, 5802 /// and the form of the message send. 5803 QualType getMessageSendResultType(QualType ReceiverType, 5804 ObjCMethodDecl *Method, 5805 bool isClassMessage, bool isSuperMessage); 5806 5807 /// \brief If the given expression involves a message send to a method 5808 /// with a related result type, emit a note describing what happened. 5809 void EmitRelatedResultTypeNote(const Expr *E); 5810 5811 /// CheckBooleanCondition - Diagnose problems involving the use of 5812 /// the given expression as a boolean condition (e.g. in an if 5813 /// statement). Also performs the standard function and array 5814 /// decays, possibly changing the input variable. 5815 /// 5816 /// \param Loc - A location associated with the condition, e.g. the 5817 /// 'if' keyword. 5818 /// \return true iff there were any errors 5819 ExprResult CheckBooleanCondition(Expr *E, SourceLocation Loc); 5820 5821 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 5822 Expr *SubExpr); 5823 5824 /// DiagnoseAssignmentAsCondition - Given that an expression is 5825 /// being used as a boolean condition, warn if it's an assignment. 5826 void DiagnoseAssignmentAsCondition(Expr *E); 5827 5828 /// \brief Redundant parentheses over an equality comparison can indicate 5829 /// that the user intended an assignment used as condition. 5830 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE); 5831 5832 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 5833 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 5834 5835 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 5836 /// the specified width and sign. If an overflow occurs, detect it and emit 5837 /// the specified diagnostic. 5838 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 5839 unsigned NewWidth, bool NewSign, 5840 SourceLocation Loc, unsigned DiagID); 5841 5842 /// Checks that the Objective-C declaration is declared in the global scope. 5843 /// Emits an error and marks the declaration as invalid if it's not declared 5844 /// in the global scope. 5845 bool CheckObjCDeclScope(Decl *D); 5846 5847 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 5848 /// and reports the appropriate diagnostics. Returns false on success. 5849 /// Can optionally return the value of the expression. 5850 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 5851 5852 /// VerifyBitField - verifies that a bit field expression is an ICE and has 5853 /// the correct width, and that the field type is valid. 5854 /// Returns false on success. 5855 /// Can optionally return whether the bit-field is of width 0 5856 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 5857 QualType FieldTy, const Expr *BitWidth, 5858 bool *ZeroWidth = 0); 5859 5860 /// \name Code completion 5861 //@{ 5862 /// \brief Describes the context in which code completion occurs. 5863 enum ParserCompletionContext { 5864 /// \brief Code completion occurs at top-level or namespace context. 5865 PCC_Namespace, 5866 /// \brief Code completion occurs within a class, struct, or union. 5867 PCC_Class, 5868 /// \brief Code completion occurs within an Objective-C interface, protocol, 5869 /// or category. 5870 PCC_ObjCInterface, 5871 /// \brief Code completion occurs within an Objective-C implementation or 5872 /// category implementation 5873 PCC_ObjCImplementation, 5874 /// \brief Code completion occurs within the list of instance variables 5875 /// in an Objective-C interface, protocol, category, or implementation. 5876 PCC_ObjCInstanceVariableList, 5877 /// \brief Code completion occurs following one or more template 5878 /// headers. 5879 PCC_Template, 5880 /// \brief Code completion occurs following one or more template 5881 /// headers within a class. 5882 PCC_MemberTemplate, 5883 /// \brief Code completion occurs within an expression. 5884 PCC_Expression, 5885 /// \brief Code completion occurs within a statement, which may 5886 /// also be an expression or a declaration. 5887 PCC_Statement, 5888 /// \brief Code completion occurs at the beginning of the 5889 /// initialization statement (or expression) in a for loop. 5890 PCC_ForInit, 5891 /// \brief Code completion occurs within the condition of an if, 5892 /// while, switch, or for statement. 5893 PCC_Condition, 5894 /// \brief Code completion occurs within the body of a function on a 5895 /// recovery path, where we do not have a specific handle on our position 5896 /// in the grammar. 5897 PCC_RecoveryInFunction, 5898 /// \brief Code completion occurs where only a type is permitted. 5899 PCC_Type, 5900 /// \brief Code completion occurs in a parenthesized expression, which 5901 /// might also be a type cast. 5902 PCC_ParenthesizedExpression, 5903 /// \brief Code completion occurs within a sequence of declaration 5904 /// specifiers within a function, method, or block. 5905 PCC_LocalDeclarationSpecifiers 5906 }; 5907 5908 void CodeCompleteOrdinaryName(Scope *S, 5909 ParserCompletionContext CompletionContext); 5910 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 5911 bool AllowNonIdentifiers, 5912 bool AllowNestedNameSpecifiers); 5913 5914 struct CodeCompleteExpressionData; 5915 void CodeCompleteExpression(Scope *S, 5916 const CodeCompleteExpressionData &Data); 5917 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 5918 SourceLocation OpLoc, 5919 bool IsArrow); 5920 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 5921 void CodeCompleteTag(Scope *S, unsigned TagSpec); 5922 void CodeCompleteTypeQualifiers(DeclSpec &DS); 5923 void CodeCompleteCase(Scope *S); 5924 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 5925 void CodeCompleteInitializer(Scope *S, Decl *D); 5926 void CodeCompleteReturn(Scope *S); 5927 void CodeCompleteAfterIf(Scope *S); 5928 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 5929 5930 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 5931 bool EnteringContext); 5932 void CodeCompleteUsing(Scope *S); 5933 void CodeCompleteUsingDirective(Scope *S); 5934 void CodeCompleteNamespaceDecl(Scope *S); 5935 void CodeCompleteNamespaceAliasDecl(Scope *S); 5936 void CodeCompleteOperatorName(Scope *S); 5937 void CodeCompleteConstructorInitializer(Decl *Constructor, 5938 CXXCtorInitializer** Initializers, 5939 unsigned NumInitializers); 5940 5941 void CodeCompleteObjCAtDirective(Scope *S); 5942 void CodeCompleteObjCAtVisibility(Scope *S); 5943 void CodeCompleteObjCAtStatement(Scope *S); 5944 void CodeCompleteObjCAtExpression(Scope *S); 5945 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 5946 void CodeCompleteObjCPropertyGetter(Scope *S); 5947 void CodeCompleteObjCPropertySetter(Scope *S); 5948 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 5949 bool IsParameter); 5950 void CodeCompleteObjCMessageReceiver(Scope *S); 5951 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 5952 IdentifierInfo **SelIdents, 5953 unsigned NumSelIdents, 5954 bool AtArgumentExpression); 5955 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 5956 IdentifierInfo **SelIdents, 5957 unsigned NumSelIdents, 5958 bool AtArgumentExpression, 5959 bool IsSuper = false); 5960 void CodeCompleteObjCInstanceMessage(Scope *S, Expr *Receiver, 5961 IdentifierInfo **SelIdents, 5962 unsigned NumSelIdents, 5963 bool AtArgumentExpression, 5964 ObjCInterfaceDecl *Super = 0); 5965 void CodeCompleteObjCForCollection(Scope *S, 5966 DeclGroupPtrTy IterationVar); 5967 void CodeCompleteObjCSelector(Scope *S, 5968 IdentifierInfo **SelIdents, 5969 unsigned NumSelIdents); 5970 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 5971 unsigned NumProtocols); 5972 void CodeCompleteObjCProtocolDecl(Scope *S); 5973 void CodeCompleteObjCInterfaceDecl(Scope *S); 5974 void CodeCompleteObjCSuperclass(Scope *S, 5975 IdentifierInfo *ClassName, 5976 SourceLocation ClassNameLoc); 5977 void CodeCompleteObjCImplementationDecl(Scope *S); 5978 void CodeCompleteObjCInterfaceCategory(Scope *S, 5979 IdentifierInfo *ClassName, 5980 SourceLocation ClassNameLoc); 5981 void CodeCompleteObjCImplementationCategory(Scope *S, 5982 IdentifierInfo *ClassName, 5983 SourceLocation ClassNameLoc); 5984 void CodeCompleteObjCPropertyDefinition(Scope *S); 5985 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 5986 IdentifierInfo *PropertyName); 5987 void CodeCompleteObjCMethodDecl(Scope *S, 5988 bool IsInstanceMethod, 5989 ParsedType ReturnType); 5990 void CodeCompleteObjCMethodDeclSelector(Scope *S, 5991 bool IsInstanceMethod, 5992 bool AtParameterName, 5993 ParsedType ReturnType, 5994 IdentifierInfo **SelIdents, 5995 unsigned NumSelIdents); 5996 void CodeCompletePreprocessorDirective(bool InConditional); 5997 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 5998 void CodeCompletePreprocessorMacroName(bool IsDefinition); 5999 void CodeCompletePreprocessorExpression(); 6000 void CodeCompletePreprocessorMacroArgument(Scope *S, 6001 IdentifierInfo *Macro, 6002 MacroInfo *MacroInfo, 6003 unsigned Argument); 6004 void CodeCompleteNaturalLanguage(); 6005 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 6006 SmallVectorImpl<CodeCompletionResult> &Results); 6007 //@} 6008 6009 //===--------------------------------------------------------------------===// 6010 // Extra semantic analysis beyond the C type system 6011 6012public: 6013 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 6014 unsigned ByteNo) const; 6015 6016private: 6017 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr, 6018 bool isSubscript=false, bool AllowOnePastEnd=true); 6019 void CheckArrayAccess(const Expr *E); 6020 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 6021 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 6022 6023 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 6024 bool CheckObjCString(Expr *Arg); 6025 6026 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6027 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6028 6029 bool SemaBuiltinVAStart(CallExpr *TheCall); 6030 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 6031 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 6032 6033public: 6034 // Used by C++ template instantiation. 6035 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 6036 6037private: 6038 bool SemaBuiltinPrefetch(CallExpr *TheCall); 6039 bool SemaBuiltinObjectSize(CallExpr *TheCall); 6040 bool SemaBuiltinLongjmp(CallExpr *TheCall); 6041 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 6042 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 6043 llvm::APSInt &Result); 6044 6045 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 6046 bool HasVAListArg, unsigned format_idx, 6047 unsigned firstDataArg, bool isPrintf); 6048 6049 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 6050 const CallExpr *TheCall, bool HasVAListArg, 6051 unsigned format_idx, unsigned firstDataArg, 6052 bool isPrintf); 6053 6054 void CheckNonNullArguments(const NonNullAttr *NonNull, 6055 const Expr * const *ExprArgs, 6056 SourceLocation CallSiteLoc); 6057 6058 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 6059 unsigned format_idx, unsigned firstDataArg, 6060 bool isPrintf); 6061 6062 /// \brief Enumeration used to describe which of the memory setting or copying 6063 /// functions is being checked by \c CheckMemaccessArguments(). 6064 enum CheckedMemoryFunction { 6065 CMF_Memset, 6066 CMF_Memcpy, 6067 CMF_Memmove, 6068 CMF_Memcmp 6069 }; 6070 6071 void CheckMemaccessArguments(const CallExpr *Call, CheckedMemoryFunction CMF, 6072 IdentifierInfo *FnName); 6073 6074 void CheckStrlcpycatArguments(const CallExpr *Call, 6075 IdentifierInfo *FnName); 6076 6077 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 6078 SourceLocation ReturnLoc); 6079 void CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr* RHS); 6080 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 6081 6082 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 6083 Expr *Init); 6084 6085 /// \brief The parser's current scope. 6086 /// 6087 /// The parser maintains this state here. 6088 Scope *CurScope; 6089 6090protected: 6091 friend class Parser; 6092 friend class InitializationSequence; 6093 friend class ASTReader; 6094 friend class ASTWriter; 6095 6096public: 6097 /// \brief Retrieve the parser's current scope. 6098 /// 6099 /// This routine must only be used when it is certain that semantic analysis 6100 /// and the parser are in precisely the same context, which is not the case 6101 /// when, e.g., we are performing any kind of template instantiation. 6102 /// Therefore, the only safe places to use this scope are in the parser 6103 /// itself and in routines directly invoked from the parser and *never* from 6104 /// template substitution or instantiation. 6105 Scope *getCurScope() const { return CurScope; } 6106 6107 Decl *getObjCDeclContext() const; 6108}; 6109 6110/// \brief RAII object that enters a new expression evaluation context. 6111class EnterExpressionEvaluationContext { 6112 Sema &Actions; 6113 6114public: 6115 EnterExpressionEvaluationContext(Sema &Actions, 6116 Sema::ExpressionEvaluationContext NewContext) 6117 : Actions(Actions) { 6118 Actions.PushExpressionEvaluationContext(NewContext); 6119 } 6120 6121 ~EnterExpressionEvaluationContext() { 6122 Actions.PopExpressionEvaluationContext(); 6123 } 6124}; 6125 6126} // end namespace clang 6127 6128#endif 6129