Sema.h revision dbfb371e297794e827ad2e5b33b45fafbfc46b29
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/AST/Expr.h" 24#include "clang/AST/DeclarationName.h" 25#include "clang/AST/ExternalASTSource.h" 26#include "clang/AST/TypeLoc.h" 27#include "clang/Basic/Specifiers.h" 28#include "clang/Basic/TemplateKinds.h" 29#include "clang/Basic/TypeTraits.h" 30#include "clang/Basic/ExpressionTraits.h" 31#include "llvm/ADT/OwningPtr.h" 32#include "llvm/ADT/SmallPtrSet.h" 33#include "llvm/ADT/SmallVector.h" 34#include <deque> 35#include <string> 36 37namespace llvm { 38 class APSInt; 39 template <typename ValueT> struct DenseMapInfo; 40 template <typename ValueT, typename ValueInfoT> class DenseSet; 41} 42 43namespace clang { 44 class ADLResult; 45 class ASTConsumer; 46 class ASTContext; 47 class ASTMutationListener; 48 class ArrayType; 49 class AttributeList; 50 class BlockDecl; 51 class CXXBasePath; 52 class CXXBasePaths; 53 typedef llvm::SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 54 class CXXConstructorDecl; 55 class CXXConversionDecl; 56 class CXXDestructorDecl; 57 class CXXFieldCollector; 58 class CXXMemberCallExpr; 59 class CXXMethodDecl; 60 class CXXScopeSpec; 61 class CXXTemporary; 62 class CXXTryStmt; 63 class CallExpr; 64 class ClassTemplateDecl; 65 class ClassTemplatePartialSpecializationDecl; 66 class ClassTemplateSpecializationDecl; 67 class CodeCompleteConsumer; 68 class CodeCompletionAllocator; 69 class CodeCompletionResult; 70 class Decl; 71 class DeclAccessPair; 72 class DeclContext; 73 class DeclRefExpr; 74 class DeclaratorDecl; 75 class DeducedTemplateArgument; 76 class DependentDiagnostic; 77 class DesignatedInitExpr; 78 class Designation; 79 class EnumConstantDecl; 80 class Expr; 81 class ExtVectorType; 82 class ExternalSemaSource; 83 class FormatAttr; 84 class FriendDecl; 85 class FunctionDecl; 86 class FunctionProtoType; 87 class FunctionTemplateDecl; 88 class ImplicitConversionSequence; 89 class InitListExpr; 90 class InitializationKind; 91 class InitializationSequence; 92 class InitializedEntity; 93 class IntegerLiteral; 94 class LabelStmt; 95 class LangOptions; 96 class LocalInstantiationScope; 97 class LookupResult; 98 class MacroInfo; 99 class MultiLevelTemplateArgumentList; 100 class NamedDecl; 101 class NonNullAttr; 102 class ObjCCategoryDecl; 103 class ObjCCategoryImplDecl; 104 class ObjCCompatibleAliasDecl; 105 class ObjCContainerDecl; 106 class ObjCImplDecl; 107 class ObjCImplementationDecl; 108 class ObjCInterfaceDecl; 109 class ObjCIvarDecl; 110 template <class T> class ObjCList; 111 class ObjCMessageExpr; 112 class ObjCMethodDecl; 113 class ObjCPropertyDecl; 114 class ObjCProtocolDecl; 115 class OverloadCandidateSet; 116 class OverloadExpr; 117 class ParenListExpr; 118 class ParmVarDecl; 119 class Preprocessor; 120 class PseudoDestructorTypeStorage; 121 class QualType; 122 class StandardConversionSequence; 123 class Stmt; 124 class StringLiteral; 125 class SwitchStmt; 126 class TargetAttributesSema; 127 class TemplateArgument; 128 class TemplateArgumentList; 129 class TemplateArgumentLoc; 130 class TemplateDecl; 131 class TemplateParameterList; 132 class TemplatePartialOrderingContext; 133 class TemplateTemplateParmDecl; 134 class Token; 135 class TypeAliasDecl; 136 class TypedefDecl; 137 class TypedefNameDecl; 138 class TypeLoc; 139 class UnqualifiedId; 140 class UnresolvedLookupExpr; 141 class UnresolvedMemberExpr; 142 class UnresolvedSetImpl; 143 class UnresolvedSetIterator; 144 class UsingDecl; 145 class UsingShadowDecl; 146 class ValueDecl; 147 class VarDecl; 148 class VisibilityAttr; 149 class VisibleDeclConsumer; 150 class IndirectFieldDecl; 151 152namespace sema { 153 class AccessedEntity; 154 class BlockScopeInfo; 155 class DelayedDiagnostic; 156 class FunctionScopeInfo; 157 class TemplateDeductionInfo; 158} 159 160/// \brief Holds a QualType and a TypeSourceInfo* that came out of a declarator 161/// parsing. 162/// 163/// LocInfoType is a "transient" type, only needed for passing to/from Parser 164/// and Sema, when we want to preserve type source info for a parsed type. 165/// It will not participate in the type system semantics in any way. 166class LocInfoType : public Type { 167 enum { 168 // The last number that can fit in Type's TC. 169 // Avoids conflict with an existing Type class. 170 LocInfo = Type::TypeLast + 1 171 }; 172 173 TypeSourceInfo *DeclInfo; 174 175 LocInfoType(QualType ty, TypeSourceInfo *TInfo) 176 : Type((TypeClass)LocInfo, ty, ty->isDependentType(), 177 ty->isVariablyModifiedType(), 178 ty->containsUnexpandedParameterPack()), 179 DeclInfo(TInfo) { 180 assert(getTypeClass() == (TypeClass)LocInfo && "LocInfo didn't fit in TC?"); 181 } 182 friend class Sema; 183 184public: 185 QualType getType() const { return getCanonicalTypeInternal(); } 186 TypeSourceInfo *getTypeSourceInfo() const { return DeclInfo; } 187 188 void getAsStringInternal(std::string &Str, 189 const PrintingPolicy &Policy) const; 190 191 static bool classof(const Type *T) { 192 return T->getTypeClass() == (TypeClass)LocInfo; 193 } 194 static bool classof(const LocInfoType *) { return true; } 195}; 196 197// FIXME: No way to easily map from TemplateTypeParmTypes to 198// TemplateTypeParmDecls, so we have this horrible PointerUnion. 199typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 200 SourceLocation> UnexpandedParameterPack; 201 202/// Sema - This implements semantic analysis and AST building for C. 203class Sema { 204 Sema(const Sema&); // DO NOT IMPLEMENT 205 void operator=(const Sema&); // DO NOT IMPLEMENT 206 mutable const TargetAttributesSema* TheTargetAttributesSema; 207public: 208 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 209 typedef OpaquePtr<TemplateName> TemplateTy; 210 typedef OpaquePtr<QualType> TypeTy; 211 typedef Attr AttrTy; 212 typedef CXXBaseSpecifier BaseTy; 213 typedef CXXCtorInitializer MemInitTy; 214 typedef Expr ExprTy; 215 typedef Stmt StmtTy; 216 typedef TemplateParameterList TemplateParamsTy; 217 typedef NestedNameSpecifier CXXScopeTy; 218 219 OpenCLOptions OpenCLFeatures; 220 FPOptions FPFeatures; 221 222 const LangOptions &LangOpts; 223 Preprocessor &PP; 224 ASTContext &Context; 225 ASTConsumer &Consumer; 226 Diagnostic &Diags; 227 SourceManager &SourceMgr; 228 229 /// \brief Source of additional semantic information. 230 ExternalSemaSource *ExternalSource; 231 232 /// \brief Code-completion consumer. 233 CodeCompleteConsumer *CodeCompleter; 234 235 /// CurContext - This is the current declaration context of parsing. 236 DeclContext *CurContext; 237 238 /// VAListTagName - The declaration name corresponding to __va_list_tag. 239 /// This is used as part of a hack to omit that class from ADL results. 240 DeclarationName VAListTagName; 241 242 /// PackContext - Manages the stack for #pragma pack. An alignment 243 /// of 0 indicates default alignment. 244 void *PackContext; // Really a "PragmaPackStack*" 245 246 bool MSStructPragmaOn; // True when #pragma ms_struct on 247 248 /// VisContext - Manages the stack for #pragma GCC visibility. 249 void *VisContext; // Really a "PragmaVisStack*" 250 251 /// ExprNeedsCleanups - True if the current evaluation context 252 /// requires cleanups to be run at its conclusion. 253 bool ExprNeedsCleanups; 254 255 /// \brief Stack containing information about each of the nested 256 /// function, block, and method scopes that are currently active. 257 /// 258 /// This array is never empty. Clients should ignore the first 259 /// element, which is used to cache a single FunctionScopeInfo 260 /// that's used to parse every top-level function. 261 llvm::SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 262 263 /// ExprTemporaries - This is the stack of temporaries that are created by 264 /// the current full expression. 265 llvm::SmallVector<CXXTemporary*, 8> ExprTemporaries; 266 267 /// ExtVectorDecls - This is a list all the extended vector types. This allows 268 /// us to associate a raw vector type with one of the ext_vector type names. 269 /// This is only necessary for issuing pretty diagnostics. 270 llvm::SmallVector<TypedefNameDecl*, 24> ExtVectorDecls; 271 272 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 273 llvm::OwningPtr<CXXFieldCollector> FieldCollector; 274 275 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 276 277 /// PureVirtualClassDiagSet - a set of class declarations which we have 278 /// emitted a list of pure virtual functions. Used to prevent emitting the 279 /// same list more than once. 280 llvm::OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 281 282 /// ParsingInitForAutoVars - a set of declarations with auto types for which 283 /// we are currently parsing the initializer. 284 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 285 286 /// \brief A mapping from external names to the most recent 287 /// locally-scoped external declaration with that name. 288 /// 289 /// This map contains external declarations introduced in local 290 /// scoped, e.g., 291 /// 292 /// \code 293 /// void f() { 294 /// void foo(int, int); 295 /// } 296 /// \endcode 297 /// 298 /// Here, the name "foo" will be associated with the declaration on 299 /// "foo" within f. This name is not visible outside of 300 /// "f". However, we still find it in two cases: 301 /// 302 /// - If we are declaring another external with the name "foo", we 303 /// can find "foo" as a previous declaration, so that the types 304 /// of this external declaration can be checked for 305 /// compatibility. 306 /// 307 /// - If we would implicitly declare "foo" (e.g., due to a call to 308 /// "foo" in C when no prototype or definition is visible), then 309 /// we find this declaration of "foo" and complain that it is 310 /// not visible. 311 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 312 313 /// \brief All the tentative definitions encountered in the TU. 314 llvm::SmallVector<VarDecl *, 2> TentativeDefinitions; 315 316 /// \brief The set of file scoped decls seen so far that have not been used 317 /// and must warn if not used. Only contains the first declaration. 318 llvm::SmallVector<const DeclaratorDecl*, 4> UnusedFileScopedDecls; 319 320 /// \brief All the delegating constructors seen so far in the file, used for 321 /// cycle detection at the end of the TU. 322 llvm::SmallVector<CXXConstructorDecl*, 4> DelegatingCtorDecls; 323 324 /// \brief All the overriding destructors seen during a class definition 325 /// (there could be multiple due to nested classes) that had their exception 326 /// spec checks delayed, plus the overridden destructor. 327 llvm::SmallVector<std::pair<const CXXDestructorDecl*, 328 const CXXDestructorDecl*>, 2> 329 DelayedDestructorExceptionSpecChecks; 330 331 /// \brief Callback to the parser to parse templated functions when needed. 332 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 333 LateTemplateParserCB *LateTemplateParser; 334 void *OpaqueParser; 335 336 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 337 LateTemplateParser = LTP; 338 OpaqueParser = P; 339 } 340 341 class DelayedDiagnostics; 342 343 class ParsingDeclState { 344 unsigned SavedStackSize; 345 friend class Sema::DelayedDiagnostics; 346 }; 347 348 class ProcessingContextState { 349 unsigned SavedParsingDepth; 350 unsigned SavedActiveStackBase; 351 friend class Sema::DelayedDiagnostics; 352 }; 353 354 /// A class which encapsulates the logic for delaying diagnostics 355 /// during parsing and other processing. 356 class DelayedDiagnostics { 357 /// \brief The stack of diagnostics that were delayed due to being 358 /// produced during the parsing of a declaration. 359 sema::DelayedDiagnostic *Stack; 360 361 /// \brief The number of objects on the delayed-diagnostics stack. 362 unsigned StackSize; 363 364 /// \brief The current capacity of the delayed-diagnostics stack. 365 unsigned StackCapacity; 366 367 /// \brief The index of the first "active" delayed diagnostic in 368 /// the stack. When parsing class definitions, we ignore active 369 /// delayed diagnostics from the surrounding context. 370 unsigned ActiveStackBase; 371 372 /// \brief The depth of the declarations we're currently parsing. 373 /// This gets saved and reset whenever we enter a class definition. 374 unsigned ParsingDepth; 375 376 public: 377 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 378 ActiveStackBase(0), ParsingDepth(0) {} 379 380 ~DelayedDiagnostics() { 381 delete[] reinterpret_cast<char*>(Stack); 382 } 383 384 /// Adds a delayed diagnostic. 385 void add(const sema::DelayedDiagnostic &diag); 386 387 /// Determines whether diagnostics should be delayed. 388 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 389 390 /// Observe that we've started parsing a declaration. Access and 391 /// deprecation diagnostics will be delayed; when the declaration 392 /// is completed, all active delayed diagnostics will be evaluated 393 /// in its context, and then active diagnostics stack will be 394 /// popped down to the saved depth. 395 ParsingDeclState pushParsingDecl() { 396 ParsingDepth++; 397 398 ParsingDeclState state; 399 state.SavedStackSize = StackSize; 400 return state; 401 } 402 403 /// Observe that we're completed parsing a declaration. 404 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 405 406 /// Observe that we've started processing a different context, the 407 /// contents of which are semantically separate from the 408 /// declarations it may lexically appear in. This sets aside the 409 /// current stack of active diagnostics and starts afresh. 410 ProcessingContextState pushContext() { 411 assert(StackSize >= ActiveStackBase); 412 413 ProcessingContextState state; 414 state.SavedParsingDepth = ParsingDepth; 415 state.SavedActiveStackBase = ActiveStackBase; 416 417 ActiveStackBase = StackSize; 418 ParsingDepth = 0; 419 420 return state; 421 } 422 423 /// Observe that we've stopped processing a context. This 424 /// restores the previous stack of active diagnostics. 425 void popContext(ProcessingContextState state) { 426 assert(ActiveStackBase == StackSize); 427 assert(ParsingDepth == 0); 428 ActiveStackBase = state.SavedActiveStackBase; 429 ParsingDepth = state.SavedParsingDepth; 430 } 431 } DelayedDiagnostics; 432 433 /// A RAII object to temporarily push a declaration context. 434 class ContextRAII { 435 private: 436 Sema &S; 437 DeclContext *SavedContext; 438 ProcessingContextState SavedContextState; 439 440 public: 441 ContextRAII(Sema &S, DeclContext *ContextToPush) 442 : S(S), SavedContext(S.CurContext), 443 SavedContextState(S.DelayedDiagnostics.pushContext()) 444 { 445 assert(ContextToPush && "pushing null context"); 446 S.CurContext = ContextToPush; 447 } 448 449 void pop() { 450 if (!SavedContext) return; 451 S.CurContext = SavedContext; 452 S.DelayedDiagnostics.popContext(SavedContextState); 453 SavedContext = 0; 454 } 455 456 ~ContextRAII() { 457 pop(); 458 } 459 }; 460 461 /// WeakUndeclaredIdentifiers - Identifiers contained in 462 /// #pragma weak before declared. rare. may alias another 463 /// identifier, declared or undeclared 464 class WeakInfo { 465 IdentifierInfo *alias; // alias (optional) 466 SourceLocation loc; // for diagnostics 467 bool used; // identifier later declared? 468 public: 469 WeakInfo() 470 : alias(0), loc(SourceLocation()), used(false) {} 471 WeakInfo(IdentifierInfo *Alias, SourceLocation Loc) 472 : alias(Alias), loc(Loc), used(false) {} 473 inline IdentifierInfo * getAlias() const { return alias; } 474 inline SourceLocation getLocation() const { return loc; } 475 void setUsed(bool Used=true) { used = Used; } 476 inline bool getUsed() { return used; } 477 bool operator==(WeakInfo RHS) const { 478 return alias == RHS.getAlias() && loc == RHS.getLocation(); 479 } 480 bool operator!=(WeakInfo RHS) const { return !(*this == RHS); } 481 }; 482 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 483 484 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 485 /// #pragma weak during processing of other Decls. 486 /// I couldn't figure out a clean way to generate these in-line, so 487 /// we store them here and handle separately -- which is a hack. 488 /// It would be best to refactor this. 489 llvm::SmallVector<Decl*,2> WeakTopLevelDecl; 490 491 IdentifierResolver IdResolver; 492 493 /// Translation Unit Scope - useful to Objective-C actions that need 494 /// to lookup file scope declarations in the "ordinary" C decl namespace. 495 /// For example, user-defined classes, built-in "id" type, etc. 496 Scope *TUScope; 497 498 /// \brief The C++ "std" namespace, where the standard library resides. 499 LazyDeclPtr StdNamespace; 500 501 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 502 /// standard library. 503 LazyDeclPtr StdBadAlloc; 504 505 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 506 RecordDecl *CXXTypeInfoDecl; 507 508 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 509 RecordDecl *MSVCGuidDecl; 510 511 /// A flag to remember whether the implicit forms of operator new and delete 512 /// have been declared. 513 bool GlobalNewDeleteDeclared; 514 515 /// \brief The set of declarations that have been referenced within 516 /// a potentially evaluated expression. 517 typedef llvm::SmallVector<std::pair<SourceLocation, Decl *>, 10> 518 PotentiallyReferencedDecls; 519 520 /// \brief A set of diagnostics that may be emitted. 521 typedef llvm::SmallVector<std::pair<SourceLocation, PartialDiagnostic>, 10> 522 PotentiallyEmittedDiagnostics; 523 524 /// \brief Describes how the expressions currently being parsed are 525 /// evaluated at run-time, if at all. 526 enum ExpressionEvaluationContext { 527 /// \brief The current expression and its subexpressions occur within an 528 /// unevaluated operand (C++0x [expr]p8), such as a constant expression 529 /// or the subexpression of \c sizeof, where the type or the value of the 530 /// expression may be significant but no code will be generated to evaluate 531 /// the value of the expression at run time. 532 Unevaluated, 533 534 /// \brief The current expression is potentially evaluated at run time, 535 /// which means that code may be generated to evaluate the value of the 536 /// expression at run time. 537 PotentiallyEvaluated, 538 539 /// \brief The current expression may be potentially evaluated or it may 540 /// be unevaluated, but it is impossible to tell from the lexical context. 541 /// This evaluation context is used primary for the operand of the C++ 542 /// \c typeid expression, whose argument is potentially evaluated only when 543 /// it is an lvalue of polymorphic class type (C++ [basic.def.odr]p2). 544 PotentiallyPotentiallyEvaluated, 545 546 /// \brief The current expression is potentially evaluated, but any 547 /// declarations referenced inside that expression are only used if 548 /// in fact the current expression is used. 549 /// 550 /// This value is used when parsing default function arguments, for which 551 /// we would like to provide diagnostics (e.g., passing non-POD arguments 552 /// through varargs) but do not want to mark declarations as "referenced" 553 /// until the default argument is used. 554 PotentiallyEvaluatedIfUsed 555 }; 556 557 /// \brief Data structure used to record current or nested 558 /// expression evaluation contexts. 559 struct ExpressionEvaluationContextRecord { 560 /// \brief The expression evaluation context. 561 ExpressionEvaluationContext Context; 562 563 /// \brief Whether the enclosing context needed a cleanup. 564 bool ParentNeedsCleanups; 565 566 /// \brief The number of temporaries that were active when we 567 /// entered this expression evaluation context. 568 unsigned NumTemporaries; 569 570 /// \brief The set of declarations referenced within a 571 /// potentially potentially-evaluated context. 572 /// 573 /// When leaving a potentially potentially-evaluated context, each 574 /// of these elements will be as referenced if the corresponding 575 /// potentially potentially evaluated expression is potentially 576 /// evaluated. 577 PotentiallyReferencedDecls *PotentiallyReferenced; 578 579 /// \brief The set of diagnostics to emit should this potentially 580 /// potentially-evaluated context become evaluated. 581 PotentiallyEmittedDiagnostics *PotentiallyDiagnosed; 582 583 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 584 unsigned NumTemporaries, 585 bool ParentNeedsCleanups) 586 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups), 587 NumTemporaries(NumTemporaries), 588 PotentiallyReferenced(0), PotentiallyDiagnosed(0) { } 589 590 void addReferencedDecl(SourceLocation Loc, Decl *Decl) { 591 if (!PotentiallyReferenced) 592 PotentiallyReferenced = new PotentiallyReferencedDecls; 593 PotentiallyReferenced->push_back(std::make_pair(Loc, Decl)); 594 } 595 596 void addDiagnostic(SourceLocation Loc, const PartialDiagnostic &PD) { 597 if (!PotentiallyDiagnosed) 598 PotentiallyDiagnosed = new PotentiallyEmittedDiagnostics; 599 PotentiallyDiagnosed->push_back(std::make_pair(Loc, PD)); 600 } 601 602 void Destroy() { 603 delete PotentiallyReferenced; 604 delete PotentiallyDiagnosed; 605 PotentiallyReferenced = 0; 606 PotentiallyDiagnosed = 0; 607 } 608 }; 609 610 /// A stack of expression evaluation contexts. 611 llvm::SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 612 613 /// SpecialMemberOverloadResult - The overloading result for a special member 614 /// function. 615 /// 616 /// This is basically a wrapper around PointerIntPair. The lowest bit of the 617 /// integer is used to determine whether we have a parameter qualification 618 /// match, the second-lowest is whether we had success in resolving the 619 /// overload to a unique non-deleted function. 620 /// 621 /// The ConstParamMatch bit represents whether, when looking up a copy 622 /// constructor or assignment operator, we found a potential copy 623 /// constructor/assignment operator whose first parameter is const-qualified. 624 /// This is used for determining parameter types of other objects and is 625 /// utterly meaningless on other types of special members. 626 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 627 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 628 public: 629 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 630 : FastFoldingSetNode(ID) 631 {} 632 633 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 634 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 635 636 bool hasSuccess() const { return Pair.getInt() & 0x1; } 637 void setSuccess(bool B) { 638 Pair.setInt(unsigned(B) | hasConstParamMatch() << 1); 639 } 640 641 bool hasConstParamMatch() const { return Pair.getInt() & 0x2; } 642 void setConstParamMatch(bool B) { 643 Pair.setInt(B << 1 | unsigned(hasSuccess())); 644 } 645 }; 646 647 /// \brief A cache of special member function overload resolution results 648 /// for C++ records. 649 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 650 651 /// \brief Whether the code handled by Sema should be considered a 652 /// complete translation unit or not. 653 /// 654 /// When true (which is generally the case), Sema will perform 655 /// end-of-translation-unit semantic tasks (such as creating 656 /// initializers for tentative definitions in C) once parsing has 657 /// completed. This flag will be false when building PCH files, 658 /// since a PCH file is by definition not a complete translation 659 /// unit. 660 bool CompleteTranslationUnit; 661 662 llvm::BumpPtrAllocator BumpAlloc; 663 664 /// \brief The number of SFINAE diagnostics that have been trapped. 665 unsigned NumSFINAEErrors; 666 667 typedef llvm::DenseMap<ParmVarDecl *, llvm::SmallVector<ParmVarDecl *, 1> > 668 UnparsedDefaultArgInstantiationsMap; 669 670 /// \brief A mapping from parameters with unparsed default arguments to the 671 /// set of instantiations of each parameter. 672 /// 673 /// This mapping is a temporary data structure used when parsing 674 /// nested class templates or nested classes of class templates, 675 /// where we might end up instantiating an inner class before the 676 /// default arguments of its methods have been parsed. 677 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 678 679 // Contains the locations of the beginning of unparsed default 680 // argument locations. 681 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 682 683 /// UndefinedInternals - all the used, undefined objects with 684 /// internal linkage in this translation unit. 685 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 686 687 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 688 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 689 690 /// Method Pool - allows efficient lookup when typechecking messages to "id". 691 /// We need to maintain a list, since selectors can have differing signatures 692 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 693 /// of selectors are "overloaded"). 694 GlobalMethodPool MethodPool; 695 696 /// Method selectors used in a @selector expression. Used for implementation 697 /// of -Wselector. 698 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 699 700 GlobalMethodPool::iterator ReadMethodPool(Selector Sel); 701 702 /// Private Helper predicate to check for 'self'. 703 bool isSelfExpr(Expr *RExpr); 704public: 705 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 706 bool CompleteTranslationUnit = true, 707 CodeCompleteConsumer *CompletionConsumer = 0); 708 ~Sema(); 709 710 /// \brief Perform initialization that occurs after the parser has been 711 /// initialized but before it parses anything. 712 void Initialize(); 713 714 const LangOptions &getLangOptions() const { return LangOpts; } 715 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 716 FPOptions &getFPOptions() { return FPFeatures; } 717 718 Diagnostic &getDiagnostics() const { return Diags; } 719 SourceManager &getSourceManager() const { return SourceMgr; } 720 const TargetAttributesSema &getTargetAttributesSema() const; 721 Preprocessor &getPreprocessor() const { return PP; } 722 ASTContext &getASTContext() const { return Context; } 723 ASTConsumer &getASTConsumer() const { return Consumer; } 724 ASTMutationListener *getASTMutationListener() const; 725 726 /// \brief Helper class that creates diagnostics with optional 727 /// template instantiation stacks. 728 /// 729 /// This class provides a wrapper around the basic DiagnosticBuilder 730 /// class that emits diagnostics. SemaDiagnosticBuilder is 731 /// responsible for emitting the diagnostic (as DiagnosticBuilder 732 /// does) and, if the diagnostic comes from inside a template 733 /// instantiation, printing the template instantiation stack as 734 /// well. 735 class SemaDiagnosticBuilder : public DiagnosticBuilder { 736 Sema &SemaRef; 737 unsigned DiagID; 738 739 public: 740 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 741 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 742 743 explicit SemaDiagnosticBuilder(Sema &SemaRef) 744 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 745 746 ~SemaDiagnosticBuilder(); 747 }; 748 749 /// \brief Emit a diagnostic. 750 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 751 752 /// \brief Emit a partial diagnostic. 753 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 754 755 /// \brief Build a partial diagnostic. 756 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 757 758 bool findMacroSpelling(SourceLocation &loc, llvm::StringRef name); 759 760 ExprResult Owned(Expr* E) { return E; } 761 ExprResult Owned(ExprResult R) { return R; } 762 StmtResult Owned(Stmt* S) { return S; } 763 764 void ActOnEndOfTranslationUnit(); 765 766 void CheckDelegatingCtorCycles(); 767 768 Scope *getScopeForContext(DeclContext *Ctx); 769 770 void PushFunctionScope(); 771 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 772 void PopFunctionOrBlockScope(const sema::AnalysisBasedWarnings::Policy *WP =0, 773 const Decl *D = 0, const BlockExpr *blkExpr = 0); 774 775 sema::FunctionScopeInfo *getCurFunction() const { 776 return FunctionScopes.back(); 777 } 778 779 bool hasAnyUnrecoverableErrorsInThisFunction() const; 780 781 /// \brief Retrieve the current block, if any. 782 sema::BlockScopeInfo *getCurBlock(); 783 784 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 785 llvm::SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 786 787 //===--------------------------------------------------------------------===// 788 // Type Analysis / Processing: SemaType.cpp. 789 // 790 791 QualType adjustParameterType(QualType T); 792 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 793 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 794 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 795 } 796 QualType BuildPointerType(QualType T, 797 SourceLocation Loc, DeclarationName Entity); 798 QualType BuildReferenceType(QualType T, bool LValueRef, 799 SourceLocation Loc, DeclarationName Entity); 800 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 801 Expr *ArraySize, unsigned Quals, 802 SourceRange Brackets, DeclarationName Entity); 803 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 804 SourceLocation AttrLoc); 805 QualType BuildFunctionType(QualType T, 806 QualType *ParamTypes, unsigned NumParamTypes, 807 bool Variadic, unsigned Quals, 808 RefQualifierKind RefQualifier, 809 SourceLocation Loc, DeclarationName Entity, 810 FunctionType::ExtInfo Info); 811 QualType BuildMemberPointerType(QualType T, QualType Class, 812 SourceLocation Loc, 813 DeclarationName Entity); 814 QualType BuildBlockPointerType(QualType T, 815 SourceLocation Loc, DeclarationName Entity); 816 QualType BuildParenType(QualType T); 817 818 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S, 819 TagDecl **OwnedDecl = 0, 820 bool AllowAutoInTypeName = false); 821 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 822 TypeSourceInfo *ReturnTypeInfo); 823 /// \brief Package the given type and TSI into a ParsedType. 824 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 825 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 826 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 827 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 828 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 829 bool CheckDistantExceptionSpec(QualType T); 830 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 831 bool CheckEquivalentExceptionSpec( 832 const FunctionProtoType *Old, SourceLocation OldLoc, 833 const FunctionProtoType *New, SourceLocation NewLoc); 834 bool CheckEquivalentExceptionSpec( 835 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 836 const FunctionProtoType *Old, SourceLocation OldLoc, 837 const FunctionProtoType *New, SourceLocation NewLoc, 838 bool *MissingExceptionSpecification = 0, 839 bool *MissingEmptyExceptionSpecification = 0, 840 bool AllowNoexceptAllMatchWithNoSpec = false, 841 bool IsOperatorNew = false); 842 bool CheckExceptionSpecSubset( 843 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 844 const FunctionProtoType *Superset, SourceLocation SuperLoc, 845 const FunctionProtoType *Subset, SourceLocation SubLoc); 846 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 847 const FunctionProtoType *Target, SourceLocation TargetLoc, 848 const FunctionProtoType *Source, SourceLocation SourceLoc); 849 850 TypeResult ActOnTypeName(Scope *S, Declarator &D); 851 852 bool RequireCompleteType(SourceLocation Loc, QualType T, 853 const PartialDiagnostic &PD, 854 std::pair<SourceLocation, PartialDiagnostic> Note); 855 bool RequireCompleteType(SourceLocation Loc, QualType T, 856 const PartialDiagnostic &PD); 857 bool RequireCompleteType(SourceLocation Loc, QualType T, 858 unsigned DiagID); 859 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 860 std::pair<SourceLocation, 861 PartialDiagnostic> Note); 862 863 864 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 865 const CXXScopeSpec &SS, QualType T); 866 867 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 868 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 869 QualType BuildUnaryTransformType(QualType BaseType, 870 UnaryTransformType::UTTKind UKind, 871 SourceLocation Loc); 872 873 //===--------------------------------------------------------------------===// 874 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 875 // 876 877 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr); 878 879 void DiagnoseUseOfUnimplementedSelectors(); 880 881 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 882 Scope *S, CXXScopeSpec *SS = 0, 883 bool isClassName = false, 884 bool HasTrailingDot = false, 885 ParsedType ObjectType = ParsedType(), 886 bool WantNontrivialTypeSourceInfo = false); 887 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 888 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS); 889 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 890 SourceLocation IILoc, 891 Scope *S, 892 CXXScopeSpec *SS, 893 ParsedType &SuggestedType); 894 895 /// \brief Describes the result of the name lookup and resolution performed 896 /// by \c ClassifyName(). 897 enum NameClassificationKind { 898 NC_Unknown, 899 NC_Error, 900 NC_Keyword, 901 NC_Type, 902 NC_Expression, 903 NC_NestedNameSpecifier, 904 NC_TypeTemplate, 905 NC_FunctionTemplate 906 }; 907 908 class NameClassification { 909 NameClassificationKind Kind; 910 ExprResult Expr; 911 TemplateName Template; 912 ParsedType Type; 913 const IdentifierInfo *Keyword; 914 915 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 916 917 public: 918 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 919 920 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 921 922 NameClassification(const IdentifierInfo *Keyword) 923 : Kind(NC_Keyword), Keyword(Keyword) { } 924 925 static NameClassification Error() { 926 return NameClassification(NC_Error); 927 } 928 929 static NameClassification Unknown() { 930 return NameClassification(NC_Unknown); 931 } 932 933 static NameClassification NestedNameSpecifier() { 934 return NameClassification(NC_NestedNameSpecifier); 935 } 936 937 static NameClassification TypeTemplate(TemplateName Name) { 938 NameClassification Result(NC_TypeTemplate); 939 Result.Template = Name; 940 return Result; 941 } 942 943 static NameClassification FunctionTemplate(TemplateName Name) { 944 NameClassification Result(NC_FunctionTemplate); 945 Result.Template = Name; 946 return Result; 947 } 948 949 NameClassificationKind getKind() const { return Kind; } 950 951 ParsedType getType() const { 952 assert(Kind == NC_Type); 953 return Type; 954 } 955 956 ExprResult getExpression() const { 957 assert(Kind == NC_Expression); 958 return Expr; 959 } 960 961 TemplateName getTemplateName() const { 962 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 963 return Template; 964 } 965 966 TemplateNameKind getTemplateNameKind() const { 967 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 968 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 969 } 970}; 971 972 /// \brief Perform name lookup on the given name, classifying it based on 973 /// the results of name lookup and the following token. 974 /// 975 /// This routine is used by the parser to resolve identifiers and help direct 976 /// parsing. When the identifier cannot be found, this routine will attempt 977 /// to correct the typo and classify based on the resulting name. 978 /// 979 /// \param S The scope in which we're performing name lookup. 980 /// 981 /// \param SS The nested-name-specifier that precedes the name. 982 /// 983 /// \param Name The identifier. If typo correction finds an alternative name, 984 /// this pointer parameter will be updated accordingly. 985 /// 986 /// \param NameLoc The location of the identifier. 987 /// 988 /// \param NextToken The token following the identifier. Used to help 989 /// disambiguate the name. 990 NameClassification ClassifyName(Scope *S, 991 CXXScopeSpec &SS, 992 IdentifierInfo *&Name, 993 SourceLocation NameLoc, 994 const Token &NextToken); 995 996 Decl *ActOnDeclarator(Scope *S, Declarator &D, 997 bool IsFunctionDefintion = false); 998 999 Decl *HandleDeclarator(Scope *S, Declarator &D, 1000 MultiTemplateParamsArg TemplateParameterLists, 1001 bool IsFunctionDefinition); 1002 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 1003 const LookupResult &Previous, 1004 Scope *S); 1005 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 1006 void DiagnoseFunctionSpecifiers(Declarator& D); 1007 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 1008 void CheckShadow(Scope *S, VarDecl *D); 1009 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 1010 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 1011 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1012 QualType R, TypeSourceInfo *TInfo, 1013 LookupResult &Previous, bool &Redeclaration); 1014 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 1015 LookupResult &Previous, bool &Redeclaration); 1016 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1017 QualType R, TypeSourceInfo *TInfo, 1018 LookupResult &Previous, 1019 MultiTemplateParamsArg TemplateParamLists, 1020 bool &Redeclaration); 1021 void CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous, 1022 bool &Redeclaration); 1023 void CheckCompleteVariableDeclaration(VarDecl *var); 1024 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1025 QualType R, TypeSourceInfo *TInfo, 1026 LookupResult &Previous, 1027 MultiTemplateParamsArg TemplateParamLists, 1028 bool IsFunctionDefinition, 1029 bool &Redeclaration); 1030 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1031 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1032 void CheckFunctionDeclaration(Scope *S, 1033 FunctionDecl *NewFD, LookupResult &Previous, 1034 bool IsExplicitSpecialization, 1035 bool &Redeclaration); 1036 void CheckMain(FunctionDecl *FD); 1037 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1038 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1039 SourceLocation Loc, 1040 QualType T); 1041 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1042 SourceLocation NameLoc, IdentifierInfo *Name, 1043 QualType T, TypeSourceInfo *TSInfo, 1044 StorageClass SC, StorageClass SCAsWritten); 1045 void ActOnParamDefaultArgument(Decl *param, 1046 SourceLocation EqualLoc, 1047 Expr *defarg); 1048 void ActOnParamUnparsedDefaultArgument(Decl *param, 1049 SourceLocation EqualLoc, 1050 SourceLocation ArgLoc); 1051 void ActOnParamDefaultArgumentError(Decl *param); 1052 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1053 SourceLocation EqualLoc); 1054 1055 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1056 bool TypeMayContainAuto); 1057 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1058 void ActOnInitializerError(Decl *Dcl); 1059 void ActOnCXXForRangeDecl(Decl *D); 1060 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1061 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1062 void FinalizeDeclaration(Decl *D); 1063 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1064 Decl **Group, 1065 unsigned NumDecls); 1066 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1067 bool TypeMayContainAuto = true); 1068 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1069 SourceLocation LocAfterDecls); 1070 void CheckForFunctionRedefinition(FunctionDecl *FD); 1071 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1072 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1073 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1074 1075 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1076 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1077 1078 /// \brief Diagnose any unused parameters in the given sequence of 1079 /// ParmVarDecl pointers. 1080 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1081 ParmVarDecl * const *End); 1082 1083 /// \brief Diagnose whether the size of parameters or return value of a 1084 /// function or obj-c method definition is pass-by-value and larger than a 1085 /// specified threshold. 1086 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1087 ParmVarDecl * const *End, 1088 QualType ReturnTy, 1089 NamedDecl *D); 1090 1091 void DiagnoseInvalidJumps(Stmt *Body); 1092 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1093 SourceLocation AsmLoc, 1094 SourceLocation RParenLoc); 1095 1096 /// Scope actions. 1097 void ActOnPopScope(SourceLocation Loc, Scope *S); 1098 void ActOnTranslationUnitScope(Scope *S); 1099 1100 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1101 DeclSpec &DS); 1102 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1103 DeclSpec &DS, 1104 MultiTemplateParamsArg TemplateParams); 1105 1106 StmtResult ActOnVlaStmt(const DeclSpec &DS); 1107 1108 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1109 AccessSpecifier AS, 1110 RecordDecl *Record); 1111 1112 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1113 RecordDecl *Record); 1114 1115 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1116 TagTypeKind NewTag, bool isDefinition, 1117 SourceLocation NewTagLoc, 1118 const IdentifierInfo &Name); 1119 1120 enum TagUseKind { 1121 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1122 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1123 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1124 TUK_Friend // Friend declaration: 'friend struct foo;' 1125 }; 1126 1127 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1128 SourceLocation KWLoc, CXXScopeSpec &SS, 1129 IdentifierInfo *Name, SourceLocation NameLoc, 1130 AttributeList *Attr, AccessSpecifier AS, 1131 MultiTemplateParamsArg TemplateParameterLists, 1132 bool &OwnedDecl, bool &IsDependent, bool ScopedEnum, 1133 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1134 1135 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1136 unsigned TagSpec, SourceLocation TagLoc, 1137 CXXScopeSpec &SS, 1138 IdentifierInfo *Name, SourceLocation NameLoc, 1139 AttributeList *Attr, 1140 MultiTemplateParamsArg TempParamLists); 1141 1142 TypeResult ActOnDependentTag(Scope *S, 1143 unsigned TagSpec, 1144 TagUseKind TUK, 1145 const CXXScopeSpec &SS, 1146 IdentifierInfo *Name, 1147 SourceLocation TagLoc, 1148 SourceLocation NameLoc); 1149 1150 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1151 IdentifierInfo *ClassName, 1152 llvm::SmallVectorImpl<Decl *> &Decls); 1153 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1154 Declarator &D, Expr *BitfieldWidth); 1155 1156 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1157 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1158 AccessSpecifier AS); 1159 1160 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1161 TypeSourceInfo *TInfo, 1162 RecordDecl *Record, SourceLocation Loc, 1163 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1164 SourceLocation TSSL, 1165 AccessSpecifier AS, NamedDecl *PrevDecl, 1166 Declarator *D = 0); 1167 1168 enum CXXSpecialMember { 1169 CXXDefaultConstructor, 1170 CXXCopyConstructor, 1171 CXXMoveConstructor, 1172 CXXCopyAssignment, 1173 CXXMoveAssignment, 1174 CXXDestructor, 1175 CXXInvalid 1176 }; 1177 bool CheckNontrivialField(FieldDecl *FD); 1178 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1179 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1180 void ActOnLastBitfield(SourceLocation DeclStart, Decl *IntfDecl, 1181 llvm::SmallVectorImpl<Decl *> &AllIvarDecls); 1182 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, Decl *IntfDecl, 1183 Declarator &D, Expr *BitfieldWidth, 1184 tok::ObjCKeywordKind visibility); 1185 1186 // This is used for both record definitions and ObjC interface declarations. 1187 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1188 Decl **Fields, unsigned NumFields, 1189 SourceLocation LBrac, SourceLocation RBrac, 1190 AttributeList *AttrList); 1191 1192 /// ActOnTagStartDefinition - Invoked when we have entered the 1193 /// scope of a tag's definition (e.g., for an enumeration, class, 1194 /// struct, or union). 1195 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1196 1197 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1198 /// C++ record definition's base-specifiers clause and are starting its 1199 /// member declarations. 1200 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1201 SourceLocation FinalLoc, 1202 SourceLocation LBraceLoc); 1203 1204 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1205 /// the definition of a tag (enumeration, class, struct, or union). 1206 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1207 SourceLocation RBraceLoc); 1208 1209 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1210 /// error parsing the definition of a tag. 1211 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1212 1213 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1214 EnumConstantDecl *LastEnumConst, 1215 SourceLocation IdLoc, 1216 IdentifierInfo *Id, 1217 Expr *val); 1218 1219 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1220 SourceLocation IdLoc, IdentifierInfo *Id, 1221 AttributeList *Attrs, 1222 SourceLocation EqualLoc, Expr *Val); 1223 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1224 SourceLocation RBraceLoc, Decl *EnumDecl, 1225 Decl **Elements, unsigned NumElements, 1226 Scope *S, AttributeList *Attr); 1227 1228 DeclContext *getContainingDC(DeclContext *DC); 1229 1230 /// Set the current declaration context until it gets popped. 1231 void PushDeclContext(Scope *S, DeclContext *DC); 1232 void PopDeclContext(); 1233 1234 /// EnterDeclaratorContext - Used when we must lookup names in the context 1235 /// of a declarator's nested name specifier. 1236 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1237 void ExitDeclaratorContext(Scope *S); 1238 1239 DeclContext *getFunctionLevelDeclContext(); 1240 1241 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1242 /// to the function decl for the function being parsed. If we're currently 1243 /// in a 'block', this returns the containing context. 1244 FunctionDecl *getCurFunctionDecl(); 1245 1246 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1247 /// the method decl for the method being parsed. If we're currently 1248 /// in a 'block', this returns the containing context. 1249 ObjCMethodDecl *getCurMethodDecl(); 1250 1251 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1252 /// or C function we're in, otherwise return null. If we're currently 1253 /// in a 'block', this returns the containing context. 1254 NamedDecl *getCurFunctionOrMethodDecl(); 1255 1256 /// Add this decl to the scope shadowed decl chains. 1257 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1258 1259 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1260 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1261 /// true if 'D' belongs to the given declaration context. 1262 /// 1263 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1264 /// whether the declaration is in scope for the purposes of explicit template 1265 /// instantiation or specialization. The default is false. 1266 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1267 bool ExplicitInstantiationOrSpecialization = false); 1268 1269 /// Finds the scope corresponding to the given decl context, if it 1270 /// happens to be an enclosing scope. Otherwise return NULL. 1271 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1272 1273 /// Subroutines of ActOnDeclarator(). 1274 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1275 TypeSourceInfo *TInfo); 1276 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1277 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1278 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1279 void mergeObjCMethodDecls(ObjCMethodDecl *New, const ObjCMethodDecl *Old); 1280 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1281 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1282 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1283 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1284 1285 // AssignmentAction - This is used by all the assignment diagnostic functions 1286 // to represent what is actually causing the operation 1287 enum AssignmentAction { 1288 AA_Assigning, 1289 AA_Passing, 1290 AA_Returning, 1291 AA_Converting, 1292 AA_Initializing, 1293 AA_Sending, 1294 AA_Casting 1295 }; 1296 1297 /// C++ Overloading. 1298 enum OverloadKind { 1299 /// This is a legitimate overload: the existing declarations are 1300 /// functions or function templates with different signatures. 1301 Ovl_Overload, 1302 1303 /// This is not an overload because the signature exactly matches 1304 /// an existing declaration. 1305 Ovl_Match, 1306 1307 /// This is not an overload because the lookup results contain a 1308 /// non-function. 1309 Ovl_NonFunction 1310 }; 1311 OverloadKind CheckOverload(Scope *S, 1312 FunctionDecl *New, 1313 const LookupResult &OldDecls, 1314 NamedDecl *&OldDecl, 1315 bool IsForUsingDecl); 1316 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1317 1318 ImplicitConversionSequence 1319 TryImplicitConversion(Expr *From, QualType ToType, 1320 bool SuppressUserConversions, 1321 bool AllowExplicit, 1322 bool InOverloadResolution, 1323 bool CStyle, 1324 bool AllowObjCWritebackConversion); 1325 1326 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1327 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1328 bool IsComplexPromotion(QualType FromType, QualType ToType); 1329 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1330 bool InOverloadResolution, 1331 QualType& ConvertedType, bool &IncompatibleObjC); 1332 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1333 QualType& ConvertedType, bool &IncompatibleObjC); 1334 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1335 QualType &ConvertedType); 1336 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1337 QualType& ConvertedType); 1338 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1339 const FunctionProtoType *NewType); 1340 1341 bool CheckPointerConversion(Expr *From, QualType ToType, 1342 CastKind &Kind, 1343 CXXCastPath& BasePath, 1344 bool IgnoreBaseAccess); 1345 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1346 bool InOverloadResolution, 1347 QualType &ConvertedType); 1348 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1349 CastKind &Kind, 1350 CXXCastPath &BasePath, 1351 bool IgnoreBaseAccess); 1352 bool IsQualificationConversion(QualType FromType, QualType ToType, 1353 bool CStyle, bool &ObjCLifetimeConversion); 1354 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1355 1356 1357 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1358 const VarDecl *NRVOCandidate, 1359 QualType ResultType, 1360 Expr *Value); 1361 1362 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1363 ExprResult Init); 1364 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1365 SourceLocation EqualLoc, 1366 ExprResult Init); 1367 ExprResult PerformObjectArgumentInitialization(Expr *From, 1368 NestedNameSpecifier *Qualifier, 1369 NamedDecl *FoundDecl, 1370 CXXMethodDecl *Method); 1371 1372 ExprResult PerformContextuallyConvertToBool(Expr *From); 1373 ExprResult PerformContextuallyConvertToObjCId(Expr *From); 1374 1375 ExprResult 1376 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1377 const PartialDiagnostic &NotIntDiag, 1378 const PartialDiagnostic &IncompleteDiag, 1379 const PartialDiagnostic &ExplicitConvDiag, 1380 const PartialDiagnostic &ExplicitConvNote, 1381 const PartialDiagnostic &AmbigDiag, 1382 const PartialDiagnostic &AmbigNote, 1383 const PartialDiagnostic &ConvDiag); 1384 1385 ExprResult PerformObjectMemberConversion(Expr *From, 1386 NestedNameSpecifier *Qualifier, 1387 NamedDecl *FoundDecl, 1388 NamedDecl *Member); 1389 1390 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1391 // TODO: make this is a typesafe union. 1392 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1393 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1394 1395 void AddOverloadCandidate(NamedDecl *Function, 1396 DeclAccessPair FoundDecl, 1397 Expr **Args, unsigned NumArgs, 1398 OverloadCandidateSet &CandidateSet); 1399 1400 void AddOverloadCandidate(FunctionDecl *Function, 1401 DeclAccessPair FoundDecl, 1402 Expr **Args, unsigned NumArgs, 1403 OverloadCandidateSet& CandidateSet, 1404 bool SuppressUserConversions = false, 1405 bool PartialOverloading = false); 1406 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1407 Expr **Args, unsigned NumArgs, 1408 OverloadCandidateSet& CandidateSet, 1409 bool SuppressUserConversions = false); 1410 void AddMethodCandidate(DeclAccessPair FoundDecl, 1411 QualType ObjectType, 1412 Expr::Classification ObjectClassification, 1413 Expr **Args, unsigned NumArgs, 1414 OverloadCandidateSet& CandidateSet, 1415 bool SuppressUserConversion = false); 1416 void AddMethodCandidate(CXXMethodDecl *Method, 1417 DeclAccessPair FoundDecl, 1418 CXXRecordDecl *ActingContext, QualType ObjectType, 1419 Expr::Classification ObjectClassification, 1420 Expr **Args, unsigned NumArgs, 1421 OverloadCandidateSet& CandidateSet, 1422 bool SuppressUserConversions = false); 1423 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1424 DeclAccessPair FoundDecl, 1425 CXXRecordDecl *ActingContext, 1426 TemplateArgumentListInfo *ExplicitTemplateArgs, 1427 QualType ObjectType, 1428 Expr::Classification ObjectClassification, 1429 Expr **Args, unsigned NumArgs, 1430 OverloadCandidateSet& CandidateSet, 1431 bool SuppressUserConversions = false); 1432 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1433 DeclAccessPair FoundDecl, 1434 TemplateArgumentListInfo *ExplicitTemplateArgs, 1435 Expr **Args, unsigned NumArgs, 1436 OverloadCandidateSet& CandidateSet, 1437 bool SuppressUserConversions = false); 1438 void AddConversionCandidate(CXXConversionDecl *Conversion, 1439 DeclAccessPair FoundDecl, 1440 CXXRecordDecl *ActingContext, 1441 Expr *From, QualType ToType, 1442 OverloadCandidateSet& CandidateSet); 1443 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1444 DeclAccessPair FoundDecl, 1445 CXXRecordDecl *ActingContext, 1446 Expr *From, QualType ToType, 1447 OverloadCandidateSet &CandidateSet); 1448 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1449 DeclAccessPair FoundDecl, 1450 CXXRecordDecl *ActingContext, 1451 const FunctionProtoType *Proto, 1452 Expr *Object, Expr **Args, unsigned NumArgs, 1453 OverloadCandidateSet& CandidateSet); 1454 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1455 SourceLocation OpLoc, 1456 Expr **Args, unsigned NumArgs, 1457 OverloadCandidateSet& CandidateSet, 1458 SourceRange OpRange = SourceRange()); 1459 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1460 Expr **Args, unsigned NumArgs, 1461 OverloadCandidateSet& CandidateSet, 1462 bool IsAssignmentOperator = false, 1463 unsigned NumContextualBoolArguments = 0); 1464 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1465 SourceLocation OpLoc, 1466 Expr **Args, unsigned NumArgs, 1467 OverloadCandidateSet& CandidateSet); 1468 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1469 bool Operator, 1470 Expr **Args, unsigned NumArgs, 1471 TemplateArgumentListInfo *ExplicitTemplateArgs, 1472 OverloadCandidateSet& CandidateSet, 1473 bool PartialOverloading = false, 1474 bool StdNamespaceIsAssociated = false); 1475 1476 // Emit as a 'note' the specific overload candidate 1477 void NoteOverloadCandidate(FunctionDecl *Fn); 1478 1479 // Emit as a series of 'note's all template and non-templates 1480 // identified by the expression Expr 1481 void NoteAllOverloadCandidates(Expr* E); 1482 1483 // [PossiblyAFunctionType] --> [Return] 1484 // NonFunctionType --> NonFunctionType 1485 // R (A) --> R(A) 1486 // R (*)(A) --> R (A) 1487 // R (&)(A) --> R (A) 1488 // R (S::*)(A) --> R (A) 1489 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1490 1491 FunctionDecl *ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, QualType TargetType, 1492 bool Complain, 1493 DeclAccessPair &Found); 1494 1495 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1496 bool Complain = false, 1497 DeclAccessPair* Found = 0); 1498 1499 ExprResult ResolveAndFixSingleFunctionTemplateSpecialization( 1500 Expr *SrcExpr, bool DoFunctionPointerConverion = false, 1501 bool Complain = false, 1502 const SourceRange& OpRangeForComplaining = SourceRange(), 1503 QualType DestTypeForComplaining = QualType(), 1504 unsigned DiagIDForComplaining = 0); 1505 1506 1507 Expr *FixOverloadedFunctionReference(Expr *E, 1508 DeclAccessPair FoundDecl, 1509 FunctionDecl *Fn); 1510 ExprResult FixOverloadedFunctionReference(ExprResult, 1511 DeclAccessPair FoundDecl, 1512 FunctionDecl *Fn); 1513 1514 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1515 Expr **Args, unsigned NumArgs, 1516 OverloadCandidateSet &CandidateSet, 1517 bool PartialOverloading = false); 1518 1519 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1520 UnresolvedLookupExpr *ULE, 1521 SourceLocation LParenLoc, 1522 Expr **Args, unsigned NumArgs, 1523 SourceLocation RParenLoc, 1524 Expr *ExecConfig); 1525 1526 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1527 unsigned Opc, 1528 const UnresolvedSetImpl &Fns, 1529 Expr *input); 1530 1531 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1532 unsigned Opc, 1533 const UnresolvedSetImpl &Fns, 1534 Expr *LHS, Expr *RHS); 1535 1536 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1537 SourceLocation RLoc, 1538 Expr *Base,Expr *Idx); 1539 1540 ExprResult 1541 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1542 SourceLocation LParenLoc, Expr **Args, 1543 unsigned NumArgs, SourceLocation RParenLoc); 1544 ExprResult 1545 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1546 Expr **Args, unsigned NumArgs, 1547 SourceLocation RParenLoc); 1548 1549 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1550 SourceLocation OpLoc); 1551 1552 /// CheckCallReturnType - Checks that a call expression's return type is 1553 /// complete. Returns true on failure. The location passed in is the location 1554 /// that best represents the call. 1555 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1556 CallExpr *CE, FunctionDecl *FD); 1557 1558 /// Helpers for dealing with blocks and functions. 1559 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1560 bool CheckParameterNames); 1561 void CheckCXXDefaultArguments(FunctionDecl *FD); 1562 void CheckExtraCXXDefaultArguments(Declarator &D); 1563 Scope *getNonFieldDeclScope(Scope *S); 1564 1565 /// \name Name lookup 1566 /// 1567 /// These routines provide name lookup that is used during semantic 1568 /// analysis to resolve the various kinds of names (identifiers, 1569 /// overloaded operator names, constructor names, etc.) into zero or 1570 /// more declarations within a particular scope. The major entry 1571 /// points are LookupName, which performs unqualified name lookup, 1572 /// and LookupQualifiedName, which performs qualified name lookup. 1573 /// 1574 /// All name lookup is performed based on some specific criteria, 1575 /// which specify what names will be visible to name lookup and how 1576 /// far name lookup should work. These criteria are important both 1577 /// for capturing language semantics (certain lookups will ignore 1578 /// certain names, for example) and for performance, since name 1579 /// lookup is often a bottleneck in the compilation of C++. Name 1580 /// lookup criteria is specified via the LookupCriteria enumeration. 1581 /// 1582 /// The results of name lookup can vary based on the kind of name 1583 /// lookup performed, the current language, and the translation 1584 /// unit. In C, for example, name lookup will either return nothing 1585 /// (no entity found) or a single declaration. In C++, name lookup 1586 /// can additionally refer to a set of overloaded functions or 1587 /// result in an ambiguity. All of the possible results of name 1588 /// lookup are captured by the LookupResult class, which provides 1589 /// the ability to distinguish among them. 1590 //@{ 1591 1592 /// @brief Describes the kind of name lookup to perform. 1593 enum LookupNameKind { 1594 /// Ordinary name lookup, which finds ordinary names (functions, 1595 /// variables, typedefs, etc.) in C and most kinds of names 1596 /// (functions, variables, members, types, etc.) in C++. 1597 LookupOrdinaryName = 0, 1598 /// Tag name lookup, which finds the names of enums, classes, 1599 /// structs, and unions. 1600 LookupTagName, 1601 /// Label name lookup. 1602 LookupLabel, 1603 /// Member name lookup, which finds the names of 1604 /// class/struct/union members. 1605 LookupMemberName, 1606 /// Look up of an operator name (e.g., operator+) for use with 1607 /// operator overloading. This lookup is similar to ordinary name 1608 /// lookup, but will ignore any declarations that are class members. 1609 LookupOperatorName, 1610 /// Look up of a name that precedes the '::' scope resolution 1611 /// operator in C++. This lookup completely ignores operator, object, 1612 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1613 LookupNestedNameSpecifierName, 1614 /// Look up a namespace name within a C++ using directive or 1615 /// namespace alias definition, ignoring non-namespace names (C++ 1616 /// [basic.lookup.udir]p1). 1617 LookupNamespaceName, 1618 /// Look up all declarations in a scope with the given name, 1619 /// including resolved using declarations. This is appropriate 1620 /// for checking redeclarations for a using declaration. 1621 LookupUsingDeclName, 1622 /// Look up an ordinary name that is going to be redeclared as a 1623 /// name with linkage. This lookup ignores any declarations that 1624 /// are outside of the current scope unless they have linkage. See 1625 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1626 LookupRedeclarationWithLinkage, 1627 /// Look up the name of an Objective-C protocol. 1628 LookupObjCProtocolName, 1629 /// \brief Look up any declaration with any name. 1630 LookupAnyName 1631 }; 1632 1633 /// \brief Specifies whether (or how) name lookup is being performed for a 1634 /// redeclaration (vs. a reference). 1635 enum RedeclarationKind { 1636 /// \brief The lookup is a reference to this name that is not for the 1637 /// purpose of redeclaring the name. 1638 NotForRedeclaration = 0, 1639 /// \brief The lookup results will be used for redeclaration of a name, 1640 /// if an entity by that name already exists. 1641 ForRedeclaration 1642 }; 1643 1644private: 1645 bool CppLookupName(LookupResult &R, Scope *S); 1646 1647 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1648 CXXSpecialMember SM, 1649 bool ConstArg, 1650 bool VolatileArg, 1651 bool RValueThis, 1652 bool ConstThis, 1653 bool VolatileThis); 1654 1655public: 1656 /// \brief Look up a name, looking for a single declaration. Return 1657 /// null if the results were absent, ambiguous, or overloaded. 1658 /// 1659 /// It is preferable to use the elaborated form and explicitly handle 1660 /// ambiguity and overloaded. 1661 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1662 SourceLocation Loc, 1663 LookupNameKind NameKind, 1664 RedeclarationKind Redecl 1665 = NotForRedeclaration); 1666 bool LookupName(LookupResult &R, Scope *S, 1667 bool AllowBuiltinCreation = false); 1668 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1669 bool InUnqualifiedLookup = false); 1670 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1671 bool AllowBuiltinCreation = false, 1672 bool EnteringContext = false); 1673 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1674 1675 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1676 QualType T1, QualType T2, 1677 UnresolvedSetImpl &Functions); 1678 1679 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1680 SourceLocation GnuLabelLoc = SourceLocation()); 1681 1682 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1683 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1684 CXXConstructorDecl *LookupCopyConstructor(CXXRecordDecl *Class, 1685 unsigned Quals, 1686 bool *ConstParam = 0); 1687 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1688 1689 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1690 Expr **Args, unsigned NumArgs, 1691 ADLResult &Functions, 1692 bool StdNamespaceIsAssociated = false); 1693 1694 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1695 VisibleDeclConsumer &Consumer, 1696 bool IncludeGlobalScope = true); 1697 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1698 VisibleDeclConsumer &Consumer, 1699 bool IncludeGlobalScope = true); 1700 1701 /// \brief The context in which typo-correction occurs. 1702 /// 1703 /// The typo-correction context affects which keywords (if any) are 1704 /// considered when trying to correct for typos. 1705 enum CorrectTypoContext { 1706 /// \brief An unknown context, where any keyword might be valid. 1707 CTC_Unknown, 1708 /// \brief A context where no keywords are used (e.g. we expect an actual 1709 /// name). 1710 CTC_NoKeywords, 1711 /// \brief A context where we're correcting a type name. 1712 CTC_Type, 1713 /// \brief An expression context. 1714 CTC_Expression, 1715 /// \brief A type cast, or anything else that can be followed by a '<'. 1716 CTC_CXXCasts, 1717 /// \brief A member lookup context. 1718 CTC_MemberLookup, 1719 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1720 CTC_ObjCIvarLookup, 1721 /// \brief An Objective-C property lookup context (e.g., self.prop). 1722 CTC_ObjCPropertyLookup, 1723 /// \brief The receiver of an Objective-C message send within an 1724 /// Objective-C method where 'super' is a valid keyword. 1725 CTC_ObjCMessageReceiver 1726 }; 1727 1728 DeclarationName CorrectTypo(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1729 DeclContext *MemberContext = 0, 1730 bool EnteringContext = false, 1731 CorrectTypoContext CTC = CTC_Unknown, 1732 const ObjCObjectPointerType *OPT = 0); 1733 1734 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1735 AssociatedNamespaceSet &AssociatedNamespaces, 1736 AssociatedClassSet &AssociatedClasses); 1737 1738 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1739 bool ConsiderLinkage, 1740 bool ExplicitInstantiationOrSpecialization); 1741 1742 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1743 //@} 1744 1745 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1746 SourceLocation IdLoc, 1747 bool TypoCorrection = false); 1748 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1749 Scope *S, bool ForRedeclaration, 1750 SourceLocation Loc); 1751 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1752 Scope *S); 1753 void AddKnownFunctionAttributes(FunctionDecl *FD); 1754 1755 // More parsing and symbol table subroutines. 1756 1757 // Decl attributes - this routine is the top level dispatcher. 1758 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1759 bool NonInheritable = true, bool Inheritable = true); 1760 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1761 bool NonInheritable = true, bool Inheritable = true); 1762 1763 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1764 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1765 bool CheckNoReturnAttr(const AttributeList &attr); 1766 1767 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1768 bool &IncompleteImpl, unsigned DiagID); 1769 void WarnConflictingTypedMethods(ObjCMethodDecl *ImpMethod, 1770 ObjCMethodDecl *MethodDecl, 1771 bool IsProtocolMethodDecl); 1772 1773 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1774 ObjCInterfaceDecl *IDecl); 1775 1776 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1777 1778 /// CheckProtocolMethodDefs - This routine checks unimplemented 1779 /// methods declared in protocol, and those referenced by it. 1780 /// \param IDecl - Used for checking for methods which may have been 1781 /// inherited. 1782 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1783 ObjCProtocolDecl *PDecl, 1784 bool& IncompleteImpl, 1785 const SelectorSet &InsMap, 1786 const SelectorSet &ClsMap, 1787 ObjCContainerDecl *CDecl); 1788 1789 /// CheckImplementationIvars - This routine checks if the instance variables 1790 /// listed in the implelementation match those listed in the interface. 1791 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1792 ObjCIvarDecl **Fields, unsigned nIvars, 1793 SourceLocation Loc); 1794 1795 /// \brief Determine whether we can synthesize a provisional ivar for the 1796 /// given name. 1797 ObjCPropertyDecl *canSynthesizeProvisionalIvar(IdentifierInfo *II); 1798 1799 /// \brief Determine whether we can synthesize a provisional ivar for the 1800 /// given property. 1801 bool canSynthesizeProvisionalIvar(ObjCPropertyDecl *Property); 1802 1803 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1804 /// remains unimplemented in the class or category @implementation. 1805 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1806 ObjCContainerDecl* IDecl, 1807 bool IncompleteImpl = false); 1808 1809 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1810 /// which must be implemented by this implementation. 1811 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1812 ObjCContainerDecl *CDecl, 1813 const SelectorSet &InsMap); 1814 1815 /// DefaultSynthesizeProperties - This routine default synthesizes all 1816 /// properties which must be synthesized in class's @implementation. 1817 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1818 ObjCInterfaceDecl *IDecl); 1819 1820 /// CollectImmediateProperties - This routine collects all properties in 1821 /// the class and its conforming protocols; but not those it its super class. 1822 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1823 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1824 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1825 1826 1827 /// LookupPropertyDecl - Looks up a property in the current class and all 1828 /// its protocols. 1829 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1830 IdentifierInfo *II); 1831 1832 /// Called by ActOnProperty to handle @property declarations in 1833 //// class extensions. 1834 Decl *HandlePropertyInClassExtension(Scope *S, 1835 ObjCCategoryDecl *CDecl, 1836 SourceLocation AtLoc, 1837 FieldDeclarator &FD, 1838 Selector GetterSel, 1839 Selector SetterSel, 1840 const bool isAssign, 1841 const bool isReadWrite, 1842 const unsigned Attributes, 1843 bool *isOverridingProperty, 1844 TypeSourceInfo *T, 1845 tok::ObjCKeywordKind MethodImplKind); 1846 1847 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1848 /// handle creating the ObjcPropertyDecl for a category or @interface. 1849 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1850 ObjCContainerDecl *CDecl, 1851 SourceLocation AtLoc, 1852 FieldDeclarator &FD, 1853 Selector GetterSel, 1854 Selector SetterSel, 1855 const bool isAssign, 1856 const bool isReadWrite, 1857 const unsigned Attributes, 1858 TypeSourceInfo *T, 1859 tok::ObjCKeywordKind MethodImplKind, 1860 DeclContext *lexicalDC = 0); 1861 1862 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1863 /// warning) when atomic property has one but not the other user-declared 1864 /// setter or getter. 1865 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1866 ObjCContainerDecl* IDecl); 1867 1868 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 1869 1870 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1871 1872 enum MethodMatchStrategy { 1873 MMS_loose, 1874 MMS_strict 1875 }; 1876 1877 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1878 /// true, or false, accordingly. 1879 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1880 const ObjCMethodDecl *PrevMethod, 1881 MethodMatchStrategy strategy = MMS_strict); 1882 1883 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1884 /// or protocol against those declared in their implementations. 1885 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1886 const SelectorSet &ClsMap, 1887 SelectorSet &InsMapSeen, 1888 SelectorSet &ClsMapSeen, 1889 ObjCImplDecl* IMPDecl, 1890 ObjCContainerDecl* IDecl, 1891 bool &IncompleteImpl, 1892 bool ImmediateClass); 1893 1894private: 1895 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1896 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1897 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1898 1899 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1900 /// optionally warns if there are multiple signatures. 1901 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1902 bool receiverIdOrClass, 1903 bool warn, bool instance); 1904 1905public: 1906 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1907 /// unit are added to a global pool. This allows us to efficiently associate 1908 /// a selector with a method declaraation for purposes of typechecking 1909 /// messages sent to "id" (where the class of the object is unknown). 1910 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1911 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1912 } 1913 1914 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1915 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1916 AddMethodToGlobalPool(Method, impl, /*instance*/false); 1917 } 1918 1919 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 1920 /// there are multiple signatures. 1921 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 1922 bool receiverIdOrClass=false, 1923 bool warn=true) { 1924 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1925 warn, /*instance*/true); 1926 } 1927 1928 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 1929 /// there are multiple signatures. 1930 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 1931 bool receiverIdOrClass=false, 1932 bool warn=true) { 1933 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1934 warn, /*instance*/false); 1935 } 1936 1937 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 1938 /// implementation. 1939 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 1940 1941 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 1942 /// initialization. 1943 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 1944 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 1945 1946 //===--------------------------------------------------------------------===// 1947 // Statement Parsing Callbacks: SemaStmt.cpp. 1948public: 1949 class FullExprArg { 1950 public: 1951 FullExprArg(Sema &actions) : E(0) { } 1952 1953 // FIXME: The const_cast here is ugly. RValue references would make this 1954 // much nicer (or we could duplicate a bunch of the move semantics 1955 // emulation code from Ownership.h). 1956 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 1957 1958 ExprResult release() { 1959 return move(E); 1960 } 1961 1962 Expr *get() const { return E; } 1963 1964 Expr *operator->() { 1965 return E; 1966 } 1967 1968 private: 1969 // FIXME: No need to make the entire Sema class a friend when it's just 1970 // Sema::MakeFullExpr that needs access to the constructor below. 1971 friend class Sema; 1972 1973 explicit FullExprArg(Expr *expr) : E(expr) {} 1974 1975 Expr *E; 1976 }; 1977 1978 FullExprArg MakeFullExpr(Expr *Arg) { 1979 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 1980 } 1981 1982 StmtResult ActOnExprStmt(FullExprArg Expr); 1983 1984 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 1985 SourceLocation LeadingEmptyMacroLoc = SourceLocation()); 1986 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 1987 MultiStmtArg Elts, 1988 bool isStmtExpr); 1989 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 1990 SourceLocation StartLoc, 1991 SourceLocation EndLoc); 1992 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 1993 StmtResult ActOnForEachLValueExpr(Expr *E); 1994 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 1995 SourceLocation DotDotDotLoc, Expr *RHSVal, 1996 SourceLocation ColonLoc); 1997 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 1998 1999 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2000 SourceLocation ColonLoc, 2001 Stmt *SubStmt, Scope *CurScope); 2002 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2003 SourceLocation ColonLoc, Stmt *SubStmt); 2004 2005 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2006 FullExprArg CondVal, Decl *CondVar, 2007 Stmt *ThenVal, 2008 SourceLocation ElseLoc, Stmt *ElseVal); 2009 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2010 Expr *Cond, 2011 Decl *CondVar); 2012 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2013 Stmt *Switch, Stmt *Body); 2014 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2015 FullExprArg Cond, 2016 Decl *CondVar, Stmt *Body); 2017 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2018 SourceLocation WhileLoc, 2019 SourceLocation CondLParen, Expr *Cond, 2020 SourceLocation CondRParen); 2021 2022 StmtResult ActOnForStmt(SourceLocation ForLoc, 2023 SourceLocation LParenLoc, 2024 Stmt *First, FullExprArg Second, 2025 Decl *SecondVar, 2026 FullExprArg Third, 2027 SourceLocation RParenLoc, 2028 Stmt *Body); 2029 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2030 SourceLocation LParenLoc, 2031 Stmt *First, Expr *Second, 2032 SourceLocation RParenLoc, Stmt *Body); 2033 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2034 SourceLocation LParenLoc, Stmt *LoopVar, 2035 SourceLocation ColonLoc, Expr *Collection, 2036 SourceLocation RParenLoc); 2037 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2038 SourceLocation ColonLoc, 2039 Stmt *RangeDecl, Stmt *BeginEndDecl, 2040 Expr *Cond, Expr *Inc, 2041 Stmt *LoopVarDecl, 2042 SourceLocation RParenLoc); 2043 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2044 2045 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2046 SourceLocation LabelLoc, 2047 LabelDecl *TheDecl); 2048 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2049 SourceLocation StarLoc, 2050 Expr *DestExp); 2051 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2052 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2053 2054 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2055 bool AllowFunctionParameters); 2056 2057 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2058 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2059 2060 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2061 bool IsSimple, bool IsVolatile, 2062 unsigned NumOutputs, unsigned NumInputs, 2063 IdentifierInfo **Names, 2064 MultiExprArg Constraints, 2065 MultiExprArg Exprs, 2066 Expr *AsmString, 2067 MultiExprArg Clobbers, 2068 SourceLocation RParenLoc, 2069 bool MSAsm = false); 2070 2071 2072 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2073 SourceLocation StartLoc, 2074 SourceLocation IdLoc, IdentifierInfo *Id, 2075 bool Invalid = false); 2076 2077 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2078 2079 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2080 Decl *Parm, Stmt *Body); 2081 2082 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2083 2084 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2085 MultiStmtArg Catch, Stmt *Finally); 2086 2087 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2088 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2089 Scope *CurScope); 2090 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2091 Expr *SynchExpr, 2092 Stmt *SynchBody); 2093 2094 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2095 2096 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2097 SourceLocation StartLoc, 2098 SourceLocation IdLoc, 2099 IdentifierInfo *Id); 2100 2101 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2102 2103 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2104 Decl *ExDecl, Stmt *HandlerBlock); 2105 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2106 MultiStmtArg Handlers); 2107 2108 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2109 SourceLocation TryLoc, 2110 Stmt *TryBlock, 2111 Stmt *Handler); 2112 2113 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2114 Expr *FilterExpr, 2115 Stmt *Block); 2116 2117 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2118 Stmt *Block); 2119 2120 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2121 2122 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2123 2124 /// \brief If it's a file scoped decl that must warn if not used, keep track 2125 /// of it. 2126 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2127 2128 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2129 /// whose result is unused, warn. 2130 void DiagnoseUnusedExprResult(const Stmt *S); 2131 void DiagnoseUnusedDecl(const NamedDecl *ND); 2132 2133 ParsingDeclState PushParsingDeclaration() { 2134 return DelayedDiagnostics.pushParsingDecl(); 2135 } 2136 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2137 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2138 } 2139 2140 typedef ProcessingContextState ParsingClassState; 2141 ParsingClassState PushParsingClass() { 2142 return DelayedDiagnostics.pushContext(); 2143 } 2144 void PopParsingClass(ParsingClassState state) { 2145 DelayedDiagnostics.popContext(state); 2146 } 2147 2148 void EmitDeprecationWarning(NamedDecl *D, llvm::StringRef Message, 2149 SourceLocation Loc, 2150 const ObjCInterfaceDecl *UnknownObjCClass=0); 2151 2152 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2153 2154 bool makeUnavailableInSystemHeader(SourceLocation loc, 2155 llvm::StringRef message); 2156 2157 //===--------------------------------------------------------------------===// 2158 // Expression Parsing Callbacks: SemaExpr.cpp. 2159 2160 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2161 const ObjCInterfaceDecl *UnknownObjCClass=0); 2162 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2163 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2164 ObjCMethodDecl *Getter, 2165 SourceLocation Loc); 2166 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2167 Expr **Args, unsigned NumArgs); 2168 2169 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 2170 2171 void PopExpressionEvaluationContext(); 2172 2173 void DiscardCleanupsInEvaluationContext(); 2174 2175 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 2176 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2177 void MarkDeclarationsReferencedInExpr(Expr *E); 2178 2179 /// \brief Figure out if an expression could be turned into a call. 2180 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2181 UnresolvedSetImpl &NonTemplateOverloads); 2182 /// \brief Give notes for a set of overloads. 2183 void NoteOverloads(const UnresolvedSetImpl &Overloads, 2184 const SourceLocation FinalNoteLoc); 2185 2186 /// \brief Conditionally issue a diagnostic based on the current 2187 /// evaluation context. 2188 /// 2189 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2190 /// the function body is parsed, and then do a basic reachability analysis to 2191 /// determine if the statement is reachable. If it is unreachable, the 2192 /// diagnostic will not be emitted. 2193 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *stmt, 2194 const PartialDiagnostic &PD); 2195 2196 // Primary Expressions. 2197 SourceRange getExprRange(Expr *E) const; 2198 2199 ObjCIvarDecl *SynthesizeProvisionalIvar(LookupResult &Lookup, 2200 IdentifierInfo *II, 2201 SourceLocation NameLoc); 2202 2203 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Name, 2204 bool HasTrailingLParen, bool IsAddressOfOperand); 2205 2206 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2207 CorrectTypoContext CTC = CTC_Unknown); 2208 2209 ExprResult LookupInObjCMethod(LookupResult &R, Scope *S, IdentifierInfo *II, 2210 bool AllowBuiltinCreation=false); 2211 2212 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2213 const DeclarationNameInfo &NameInfo, 2214 bool isAddressOfOperand, 2215 const TemplateArgumentListInfo *TemplateArgs); 2216 2217 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2218 ExprValueKind VK, 2219 SourceLocation Loc, 2220 const CXXScopeSpec *SS = 0); 2221 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2222 ExprValueKind VK, 2223 const DeclarationNameInfo &NameInfo, 2224 const CXXScopeSpec *SS = 0); 2225 ExprResult 2226 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2227 SourceLocation nameLoc, 2228 IndirectFieldDecl *indirectField, 2229 Expr *baseObjectExpr = 0, 2230 SourceLocation opLoc = SourceLocation()); 2231 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2232 LookupResult &R, 2233 const TemplateArgumentListInfo *TemplateArgs); 2234 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2235 LookupResult &R, 2236 const TemplateArgumentListInfo *TemplateArgs, 2237 bool IsDefiniteInstance); 2238 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2239 const LookupResult &R, 2240 bool HasTrailingLParen); 2241 2242 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2243 const DeclarationNameInfo &NameInfo); 2244 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2245 const DeclarationNameInfo &NameInfo, 2246 const TemplateArgumentListInfo *TemplateArgs); 2247 2248 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2249 LookupResult &R, 2250 bool ADL); 2251 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2252 const DeclarationNameInfo &NameInfo, 2253 NamedDecl *D); 2254 2255 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2256 ExprResult ActOnNumericConstant(const Token &); 2257 ExprResult ActOnCharacterConstant(const Token &); 2258 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *Val); 2259 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2260 SourceLocation R, 2261 MultiExprArg Val, 2262 ParsedType TypeOfCast = ParsedType()); 2263 2264 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2265 /// fragments (e.g. "foo" "bar" L"baz"). 2266 ExprResult ActOnStringLiteral(const Token *Toks, unsigned NumToks); 2267 2268 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2269 SourceLocation DefaultLoc, 2270 SourceLocation RParenLoc, 2271 Expr *ControllingExpr, 2272 MultiTypeArg Types, 2273 MultiExprArg Exprs); 2274 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2275 SourceLocation DefaultLoc, 2276 SourceLocation RParenLoc, 2277 Expr *ControllingExpr, 2278 TypeSourceInfo **Types, 2279 Expr **Exprs, 2280 unsigned NumAssocs); 2281 2282 // Binary/Unary Operators. 'Tok' is the token for the operator. 2283 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2284 Expr *InputArg); 2285 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2286 UnaryOperatorKind Opc, Expr *input); 2287 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2288 tok::TokenKind Op, Expr *Input); 2289 2290 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *T, 2291 SourceLocation OpLoc, 2292 UnaryExprOrTypeTrait ExprKind, 2293 SourceRange R); 2294 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2295 UnaryExprOrTypeTrait ExprKind); 2296 ExprResult 2297 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2298 UnaryExprOrTypeTrait ExprKind, 2299 bool isType, void *TyOrEx, 2300 const SourceRange &ArgRange); 2301 2302 ExprResult CheckPlaceholderExpr(Expr *E); 2303 bool CheckVecStepExpr(Expr *E); 2304 2305 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2306 bool CheckUnaryExprOrTypeTraitOperand(QualType type, SourceLocation OpLoc, 2307 SourceRange R, 2308 UnaryExprOrTypeTrait ExprKind); 2309 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2310 SourceLocation OpLoc, 2311 IdentifierInfo &Name, 2312 SourceLocation NameLoc, 2313 SourceLocation RParenLoc); 2314 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2315 tok::TokenKind Kind, Expr *Input); 2316 2317 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2318 Expr *Idx, SourceLocation RLoc); 2319 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2320 Expr *Idx, SourceLocation RLoc); 2321 2322 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2323 SourceLocation OpLoc, bool IsArrow, 2324 CXXScopeSpec &SS, 2325 NamedDecl *FirstQualifierInScope, 2326 const DeclarationNameInfo &NameInfo, 2327 const TemplateArgumentListInfo *TemplateArgs); 2328 2329 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2330 SourceLocation OpLoc, bool IsArrow, 2331 const CXXScopeSpec &SS, 2332 NamedDecl *FirstQualifierInScope, 2333 LookupResult &R, 2334 const TemplateArgumentListInfo *TemplateArgs, 2335 bool SuppressQualifierCheck = false); 2336 2337 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2338 bool &IsArrow, SourceLocation OpLoc, 2339 CXXScopeSpec &SS, 2340 Decl *ObjCImpDecl, 2341 bool HasTemplateArgs); 2342 2343 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2344 const CXXScopeSpec &SS, 2345 const LookupResult &R); 2346 2347 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2348 bool IsArrow, SourceLocation OpLoc, 2349 const CXXScopeSpec &SS, 2350 NamedDecl *FirstQualifierInScope, 2351 const DeclarationNameInfo &NameInfo, 2352 const TemplateArgumentListInfo *TemplateArgs); 2353 2354 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2355 SourceLocation OpLoc, 2356 tok::TokenKind OpKind, 2357 CXXScopeSpec &SS, 2358 UnqualifiedId &Member, 2359 Decl *ObjCImpDecl, 2360 bool HasTrailingLParen); 2361 2362 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2363 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2364 FunctionDecl *FDecl, 2365 const FunctionProtoType *Proto, 2366 Expr **Args, unsigned NumArgs, 2367 SourceLocation RParenLoc); 2368 2369 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2370 /// This provides the location of the left/right parens and a list of comma 2371 /// locations. 2372 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2373 MultiExprArg Args, SourceLocation RParenLoc, 2374 Expr *ExecConfig = 0); 2375 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2376 SourceLocation LParenLoc, 2377 Expr **Args, unsigned NumArgs, 2378 SourceLocation RParenLoc, 2379 Expr *ExecConfig = 0); 2380 2381 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2382 MultiExprArg ExecConfig, SourceLocation GGGLoc); 2383 2384 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2385 ParsedType Ty, SourceLocation RParenLoc, 2386 Expr *Op); 2387 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2388 TypeSourceInfo *Ty, 2389 SourceLocation RParenLoc, 2390 Expr *Op); 2391 2392 bool TypeIsVectorType(ParsedType Ty) { 2393 return GetTypeFromParser(Ty)->isVectorType(); 2394 } 2395 2396 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2397 ExprResult ActOnCastOfParenListExpr(Scope *S, SourceLocation LParenLoc, 2398 SourceLocation RParenLoc, Expr *E, 2399 TypeSourceInfo *TInfo); 2400 2401 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2402 ParsedType Ty, 2403 SourceLocation RParenLoc, 2404 Expr *Op); 2405 2406 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2407 TypeSourceInfo *TInfo, 2408 SourceLocation RParenLoc, 2409 Expr *InitExpr); 2410 2411 ExprResult ActOnInitList(SourceLocation LParenLoc, 2412 MultiExprArg InitList, 2413 SourceLocation RParenLoc); 2414 2415 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2416 SourceLocation Loc, 2417 bool GNUSyntax, 2418 ExprResult Init); 2419 2420 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2421 tok::TokenKind Kind, Expr *LHS, Expr *RHS); 2422 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2423 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2424 ExprResult CreateBuiltinBinOp(SourceLocation TokLoc, 2425 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2426 2427 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2428 /// in the case of a the GNU conditional expr extension. 2429 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2430 SourceLocation ColonLoc, 2431 Expr *Cond, Expr *LHS, Expr *RHS); 2432 2433 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2434 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2435 LabelDecl *LD); 2436 2437 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2438 SourceLocation RPLoc); // "({..})" 2439 2440 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2441 struct OffsetOfComponent { 2442 SourceLocation LocStart, LocEnd; 2443 bool isBrackets; // true if [expr], false if .ident 2444 union { 2445 IdentifierInfo *IdentInfo; 2446 ExprTy *E; 2447 } U; 2448 }; 2449 2450 /// __builtin_offsetof(type, a.b[123][456].c) 2451 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2452 TypeSourceInfo *TInfo, 2453 OffsetOfComponent *CompPtr, 2454 unsigned NumComponents, 2455 SourceLocation RParenLoc); 2456 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2457 SourceLocation BuiltinLoc, 2458 SourceLocation TypeLoc, 2459 ParsedType Arg1, 2460 OffsetOfComponent *CompPtr, 2461 unsigned NumComponents, 2462 SourceLocation RParenLoc); 2463 2464 // __builtin_choose_expr(constExpr, expr1, expr2) 2465 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2466 Expr *cond, Expr *expr1, 2467 Expr *expr2, SourceLocation RPLoc); 2468 2469 // __builtin_va_arg(expr, type) 2470 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, 2471 Expr *expr, ParsedType type, 2472 SourceLocation RPLoc); 2473 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, 2474 Expr *expr, TypeSourceInfo *TInfo, 2475 SourceLocation RPLoc); 2476 2477 // __null 2478 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2479 2480 bool CheckCaseExpression(Expr *expr); 2481 2482 bool CheckMicrosoftIfExistsSymbol(CXXScopeSpec &SS, UnqualifiedId &Name); 2483 2484 //===------------------------- "Block" Extension ------------------------===// 2485 2486 /// ActOnBlockStart - This callback is invoked when a block literal is 2487 /// started. 2488 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2489 2490 /// ActOnBlockArguments - This callback allows processing of block arguments. 2491 /// If there are no arguments, this is still invoked. 2492 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2493 2494 /// ActOnBlockError - If there is an error parsing a block, this callback 2495 /// is invoked to pop the information about the block from the action impl. 2496 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2497 2498 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2499 /// literal was successfully completed. ^(int x){...} 2500 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, 2501 Stmt *Body, Scope *CurScope); 2502 2503 //===---------------------------- OpenCL Features -----------------------===// 2504 2505 /// __builtin_astype(...) 2506 ExprResult ActOnAsTypeExpr(Expr *expr, ParsedType DestTy, 2507 SourceLocation BuiltinLoc, 2508 SourceLocation RParenLoc); 2509 2510 //===---------------------------- C++ Features --------------------------===// 2511 2512 // Act on C++ namespaces 2513 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2514 SourceLocation NamespaceLoc, 2515 SourceLocation IdentLoc, 2516 IdentifierInfo *Ident, 2517 SourceLocation LBrace, 2518 AttributeList *AttrList); 2519 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2520 2521 NamespaceDecl *getStdNamespace() const; 2522 NamespaceDecl *getOrCreateStdNamespace(); 2523 2524 CXXRecordDecl *getStdBadAlloc() const; 2525 2526 Decl *ActOnUsingDirective(Scope *CurScope, 2527 SourceLocation UsingLoc, 2528 SourceLocation NamespcLoc, 2529 CXXScopeSpec &SS, 2530 SourceLocation IdentLoc, 2531 IdentifierInfo *NamespcName, 2532 AttributeList *AttrList); 2533 2534 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2535 2536 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2537 SourceLocation NamespaceLoc, 2538 SourceLocation AliasLoc, 2539 IdentifierInfo *Alias, 2540 CXXScopeSpec &SS, 2541 SourceLocation IdentLoc, 2542 IdentifierInfo *Ident); 2543 2544 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2545 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2546 const LookupResult &PreviousDecls); 2547 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2548 NamedDecl *Target); 2549 2550 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2551 bool isTypeName, 2552 const CXXScopeSpec &SS, 2553 SourceLocation NameLoc, 2554 const LookupResult &Previous); 2555 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2556 const CXXScopeSpec &SS, 2557 SourceLocation NameLoc); 2558 2559 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2560 SourceLocation UsingLoc, 2561 CXXScopeSpec &SS, 2562 const DeclarationNameInfo &NameInfo, 2563 AttributeList *AttrList, 2564 bool IsInstantiation, 2565 bool IsTypeName, 2566 SourceLocation TypenameLoc); 2567 2568 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2569 2570 Decl *ActOnUsingDeclaration(Scope *CurScope, 2571 AccessSpecifier AS, 2572 bool HasUsingKeyword, 2573 SourceLocation UsingLoc, 2574 CXXScopeSpec &SS, 2575 UnqualifiedId &Name, 2576 AttributeList *AttrList, 2577 bool IsTypeName, 2578 SourceLocation TypenameLoc); 2579 Decl *ActOnAliasDeclaration(Scope *CurScope, 2580 AccessSpecifier AS, 2581 MultiTemplateParamsArg TemplateParams, 2582 SourceLocation UsingLoc, 2583 UnqualifiedId &Name, 2584 TypeResult Type); 2585 2586 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2587 /// ActOnDeclarator, when a C++ direct initializer is present. 2588 /// e.g: "int x(1);" 2589 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2590 SourceLocation LParenLoc, 2591 MultiExprArg Exprs, 2592 SourceLocation RParenLoc, 2593 bool TypeMayContainAuto); 2594 2595 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2596 /// and sets it as the initializer for the the passed in VarDecl. 2597 bool InitializeVarWithConstructor(VarDecl *VD, 2598 CXXConstructorDecl *Constructor, 2599 MultiExprArg Exprs); 2600 2601 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2602 /// including handling of its default argument expressions. 2603 /// 2604 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2605 ExprResult 2606 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2607 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2608 bool RequiresZeroInit, unsigned ConstructKind, 2609 SourceRange ParenRange); 2610 2611 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2612 // the constructor can be elidable? 2613 ExprResult 2614 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2615 CXXConstructorDecl *Constructor, bool Elidable, 2616 MultiExprArg Exprs, bool RequiresZeroInit, 2617 unsigned ConstructKind, 2618 SourceRange ParenRange); 2619 2620 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2621 /// the default expr if needed. 2622 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2623 FunctionDecl *FD, 2624 ParmVarDecl *Param); 2625 2626 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2627 /// constructed variable. 2628 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2629 2630 /// \brief Helper class that collects exception specifications for 2631 /// implicitly-declared special member functions. 2632 class ImplicitExceptionSpecification { 2633 // Pointer to allow copying 2634 ASTContext *Context; 2635 // We order exception specifications thus: 2636 // noexcept is the most restrictive, but is only used in C++0x. 2637 // throw() comes next. 2638 // Then a throw(collected exceptions) 2639 // Finally no specification. 2640 // throw(...) is used instead if any called function uses it. 2641 // 2642 // If this exception specification cannot be known yet (for instance, 2643 // because this is the exception specification for a defaulted default 2644 // constructor and we haven't finished parsing the deferred parts of the 2645 // class yet), the C++0x standard does not specify how to behave. We 2646 // record this as an 'unknown' exception specification, which overrules 2647 // any other specification (even 'none', to keep this rule simple). 2648 ExceptionSpecificationType ComputedEST; 2649 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2650 llvm::SmallVector<QualType, 4> Exceptions; 2651 2652 void ClearExceptions() { 2653 ExceptionsSeen.clear(); 2654 Exceptions.clear(); 2655 } 2656 2657 public: 2658 explicit ImplicitExceptionSpecification(ASTContext &Context) 2659 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2660 if (!Context.getLangOptions().CPlusPlus0x) 2661 ComputedEST = EST_DynamicNone; 2662 } 2663 2664 /// \brief Get the computed exception specification type. 2665 ExceptionSpecificationType getExceptionSpecType() const { 2666 assert(ComputedEST != EST_ComputedNoexcept && 2667 "noexcept(expr) should not be a possible result"); 2668 return ComputedEST; 2669 } 2670 2671 /// \brief The number of exceptions in the exception specification. 2672 unsigned size() const { return Exceptions.size(); } 2673 2674 /// \brief The set of exceptions in the exception specification. 2675 const QualType *data() const { return Exceptions.data(); } 2676 2677 /// \brief Integrate another called method into the collected data. 2678 void CalledDecl(CXXMethodDecl *Method); 2679 2680 /// \brief Integrate an invoked expression into the collected data. 2681 void CalledExpr(Expr *E); 2682 2683 /// \brief Specify that the exception specification can't be detemined yet. 2684 void SetDelayed() { 2685 ClearExceptions(); 2686 ComputedEST = EST_Delayed; 2687 } 2688 2689 FunctionProtoType::ExtProtoInfo getEPI() const { 2690 FunctionProtoType::ExtProtoInfo EPI; 2691 EPI.ExceptionSpecType = getExceptionSpecType(); 2692 EPI.NumExceptions = size(); 2693 EPI.Exceptions = data(); 2694 return EPI; 2695 } 2696 }; 2697 2698 /// \brief Determine what sort of exception specification a defaulted 2699 /// copy constructor of a class will have. 2700 ImplicitExceptionSpecification 2701 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2702 2703 /// \brief Determine what sort of exception specification a defaulted 2704 /// default constructor of a class will have, and whether the parameter 2705 /// will be const. 2706 std::pair<ImplicitExceptionSpecification, bool> 2707 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2708 2709 /// \brief Determine what sort of exception specification a defautled 2710 /// copy assignment operator of a class will have, and whether the 2711 /// parameter will be const. 2712 std::pair<ImplicitExceptionSpecification, bool> 2713 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2714 2715 /// \brief Determine what sort of exception specification a defaulted 2716 /// destructor of a class will have. 2717 ImplicitExceptionSpecification 2718 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 2719 2720 /// \brief Determine if a defaulted default constructor ought to be 2721 /// deleted. 2722 bool ShouldDeleteDefaultConstructor(CXXConstructorDecl *CD); 2723 2724 /// \brief Determine if a defaulted copy constructor ought to be 2725 /// deleted. 2726 bool ShouldDeleteCopyConstructor(CXXConstructorDecl *CD); 2727 2728 /// \brief Determine if a defaulted copy assignment operator ought to be 2729 /// deleted. 2730 bool ShouldDeleteCopyAssignmentOperator(CXXMethodDecl *MD); 2731 2732 /// \brief Determine if a defaulted destructor ought to be deleted. 2733 bool ShouldDeleteDestructor(CXXDestructorDecl *DD); 2734 2735 /// \brief Declare the implicit default constructor for the given class. 2736 /// 2737 /// \param ClassDecl The class declaration into which the implicit 2738 /// default constructor will be added. 2739 /// 2740 /// \returns The implicitly-declared default constructor. 2741 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2742 CXXRecordDecl *ClassDecl); 2743 2744 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2745 /// defining this constructor as the default constructor. 2746 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2747 CXXConstructorDecl *Constructor); 2748 2749 /// \brief Declare the implicit destructor for the given class. 2750 /// 2751 /// \param ClassDecl The class declaration into which the implicit 2752 /// destructor will be added. 2753 /// 2754 /// \returns The implicitly-declared destructor. 2755 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2756 2757 /// DefineImplicitDestructor - Checks for feasibility of 2758 /// defining this destructor as the default destructor. 2759 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2760 CXXDestructorDecl *Destructor); 2761 2762 /// \brief Build an exception spec for destructors that don't have one. 2763 /// 2764 /// C++11 says that user-defined destructors with no exception spec get one 2765 /// that looks as if the destructor was implicitly declared. 2766 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 2767 CXXDestructorDecl *Destructor); 2768 2769 /// \brief Declare all inherited constructors for the given class. 2770 /// 2771 /// \param ClassDecl The class declaration into which the inherited 2772 /// constructors will be added. 2773 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2774 2775 /// \brief Declare the implicit copy constructor for the given class. 2776 /// 2777 /// \param S The scope of the class, which may be NULL if this is a 2778 /// template instantiation. 2779 /// 2780 /// \param ClassDecl The class declaration into which the implicit 2781 /// copy constructor will be added. 2782 /// 2783 /// \returns The implicitly-declared copy constructor. 2784 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2785 2786 /// DefineImplicitCopyConstructor - Checks for feasibility of 2787 /// defining this constructor as the copy constructor. 2788 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2789 CXXConstructorDecl *Constructor); 2790 2791 /// \brief Declare the implicit copy assignment operator for the given class. 2792 /// 2793 /// \param S The scope of the class, which may be NULL if this is a 2794 /// template instantiation. 2795 /// 2796 /// \param ClassDecl The class declaration into which the implicit 2797 /// copy-assignment operator will be added. 2798 /// 2799 /// \returns The implicitly-declared copy assignment operator. 2800 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2801 2802 /// \brief Defined an implicitly-declared copy assignment operator. 2803 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2804 CXXMethodDecl *MethodDecl); 2805 2806 /// \brief Force the declaration of any implicitly-declared members of this 2807 /// class. 2808 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2809 2810 /// MaybeBindToTemporary - If the passed in expression has a record type with 2811 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 2812 /// it simply returns the passed in expression. 2813 ExprResult MaybeBindToTemporary(Expr *E); 2814 2815 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 2816 MultiExprArg ArgsPtr, 2817 SourceLocation Loc, 2818 ASTOwningVector<Expr*> &ConvertedArgs); 2819 2820 ParsedType getDestructorName(SourceLocation TildeLoc, 2821 IdentifierInfo &II, SourceLocation NameLoc, 2822 Scope *S, CXXScopeSpec &SS, 2823 ParsedType ObjectType, 2824 bool EnteringContext); 2825 2826 // Checks that reinterpret casts don't have undefined behavior. 2827 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 2828 bool IsDereference, SourceRange Range); 2829 2830 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 2831 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 2832 tok::TokenKind Kind, 2833 SourceLocation LAngleBracketLoc, 2834 ParsedType Ty, 2835 SourceLocation RAngleBracketLoc, 2836 SourceLocation LParenLoc, 2837 Expr *E, 2838 SourceLocation RParenLoc); 2839 2840 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 2841 tok::TokenKind Kind, 2842 TypeSourceInfo *Ty, 2843 Expr *E, 2844 SourceRange AngleBrackets, 2845 SourceRange Parens); 2846 2847 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2848 SourceLocation TypeidLoc, 2849 TypeSourceInfo *Operand, 2850 SourceLocation RParenLoc); 2851 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2852 SourceLocation TypeidLoc, 2853 Expr *Operand, 2854 SourceLocation RParenLoc); 2855 2856 /// ActOnCXXTypeid - Parse typeid( something ). 2857 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 2858 SourceLocation LParenLoc, bool isType, 2859 void *TyOrExpr, 2860 SourceLocation RParenLoc); 2861 2862 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2863 SourceLocation TypeidLoc, 2864 TypeSourceInfo *Operand, 2865 SourceLocation RParenLoc); 2866 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2867 SourceLocation TypeidLoc, 2868 Expr *Operand, 2869 SourceLocation RParenLoc); 2870 2871 /// ActOnCXXUuidof - Parse __uuidof( something ). 2872 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 2873 SourceLocation LParenLoc, bool isType, 2874 void *TyOrExpr, 2875 SourceLocation RParenLoc); 2876 2877 2878 //// ActOnCXXThis - Parse 'this' pointer. 2879 ExprResult ActOnCXXThis(SourceLocation loc); 2880 2881 /// getAndCaptureCurrentThisType - Try to capture a 'this' pointer. Returns 2882 /// the type of the 'this' pointer, or a null type if this is not possible. 2883 QualType getAndCaptureCurrentThisType(); 2884 2885 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 2886 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 2887 2888 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 2889 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 2890 2891 //// ActOnCXXThrow - Parse throw expressions. 2892 ExprResult ActOnCXXThrow(SourceLocation OpLoc, Expr *expr); 2893 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E); 2894 2895 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 2896 /// Can be interpreted either as function-style casting ("int(x)") 2897 /// or class type construction ("ClassType(x,y,z)") 2898 /// or creation of a value-initialized type ("int()"). 2899 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 2900 SourceLocation LParenLoc, 2901 MultiExprArg Exprs, 2902 SourceLocation RParenLoc); 2903 2904 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 2905 SourceLocation LParenLoc, 2906 MultiExprArg Exprs, 2907 SourceLocation RParenLoc); 2908 2909 /// ActOnCXXNew - Parsed a C++ 'new' expression. 2910 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 2911 SourceLocation PlacementLParen, 2912 MultiExprArg PlacementArgs, 2913 SourceLocation PlacementRParen, 2914 SourceRange TypeIdParens, Declarator &D, 2915 SourceLocation ConstructorLParen, 2916 MultiExprArg ConstructorArgs, 2917 SourceLocation ConstructorRParen); 2918 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 2919 SourceLocation PlacementLParen, 2920 MultiExprArg PlacementArgs, 2921 SourceLocation PlacementRParen, 2922 SourceRange TypeIdParens, 2923 QualType AllocType, 2924 TypeSourceInfo *AllocTypeInfo, 2925 Expr *ArraySize, 2926 SourceLocation ConstructorLParen, 2927 MultiExprArg ConstructorArgs, 2928 SourceLocation ConstructorRParen, 2929 bool TypeMayContainAuto = true); 2930 2931 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 2932 SourceRange R); 2933 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 2934 bool UseGlobal, QualType AllocType, bool IsArray, 2935 Expr **PlaceArgs, unsigned NumPlaceArgs, 2936 FunctionDecl *&OperatorNew, 2937 FunctionDecl *&OperatorDelete); 2938 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 2939 DeclarationName Name, Expr** Args, 2940 unsigned NumArgs, DeclContext *Ctx, 2941 bool AllowMissing, FunctionDecl *&Operator, 2942 bool Diagnose = true); 2943 void DeclareGlobalNewDelete(); 2944 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 2945 QualType Argument, 2946 bool addMallocAttr = false); 2947 2948 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 2949 DeclarationName Name, FunctionDecl* &Operator, 2950 bool Diagnose = true); 2951 2952 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 2953 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 2954 bool UseGlobal, bool ArrayForm, 2955 Expr *Operand); 2956 2957 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 2958 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 2959 SourceLocation StmtLoc, 2960 bool ConvertToBoolean); 2961 2962 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 2963 Expr *Operand, SourceLocation RParen); 2964 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 2965 SourceLocation RParen); 2966 2967 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 2968 /// pseudo-functions. 2969 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 2970 SourceLocation KWLoc, 2971 ParsedType Ty, 2972 SourceLocation RParen); 2973 2974 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 2975 SourceLocation KWLoc, 2976 TypeSourceInfo *T, 2977 SourceLocation RParen); 2978 2979 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 2980 /// pseudo-functions. 2981 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 2982 SourceLocation KWLoc, 2983 ParsedType LhsTy, 2984 ParsedType RhsTy, 2985 SourceLocation RParen); 2986 2987 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 2988 SourceLocation KWLoc, 2989 TypeSourceInfo *LhsT, 2990 TypeSourceInfo *RhsT, 2991 SourceLocation RParen); 2992 2993 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 2994 /// pseudo-functions. 2995 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 2996 SourceLocation KWLoc, 2997 ParsedType LhsTy, 2998 Expr *DimExpr, 2999 SourceLocation RParen); 3000 3001 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3002 SourceLocation KWLoc, 3003 TypeSourceInfo *TSInfo, 3004 Expr *DimExpr, 3005 SourceLocation RParen); 3006 3007 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3008 /// pseudo-functions. 3009 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3010 SourceLocation KWLoc, 3011 Expr *Queried, 3012 SourceLocation RParen); 3013 3014 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3015 SourceLocation KWLoc, 3016 Expr *Queried, 3017 SourceLocation RParen); 3018 3019 ExprResult ActOnStartCXXMemberReference(Scope *S, 3020 Expr *Base, 3021 SourceLocation OpLoc, 3022 tok::TokenKind OpKind, 3023 ParsedType &ObjectType, 3024 bool &MayBePseudoDestructor); 3025 3026 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3027 3028 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3029 SourceLocation OpLoc, 3030 tok::TokenKind OpKind, 3031 const CXXScopeSpec &SS, 3032 TypeSourceInfo *ScopeType, 3033 SourceLocation CCLoc, 3034 SourceLocation TildeLoc, 3035 PseudoDestructorTypeStorage DestroyedType, 3036 bool HasTrailingLParen); 3037 3038 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3039 SourceLocation OpLoc, 3040 tok::TokenKind OpKind, 3041 CXXScopeSpec &SS, 3042 UnqualifiedId &FirstTypeName, 3043 SourceLocation CCLoc, 3044 SourceLocation TildeLoc, 3045 UnqualifiedId &SecondTypeName, 3046 bool HasTrailingLParen); 3047 3048 /// MaybeCreateExprWithCleanups - If the current full-expression 3049 /// requires any cleanups, surround it with a ExprWithCleanups node. 3050 /// Otherwise, just returns the passed-in expression. 3051 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3052 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3053 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3054 3055 ExprResult ActOnFinishFullExpr(Expr *Expr); 3056 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3057 3058 // Marks SS invalid if it represents an incomplete type. 3059 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3060 3061 DeclContext *computeDeclContext(QualType T); 3062 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3063 bool EnteringContext = false); 3064 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3065 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3066 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3067 3068 /// \brief The parser has parsed a global nested-name-specifier '::'. 3069 /// 3070 /// \param S The scope in which this nested-name-specifier occurs. 3071 /// 3072 /// \param CCLoc The location of the '::'. 3073 /// 3074 /// \param SS The nested-name-specifier, which will be updated in-place 3075 /// to reflect the parsed nested-name-specifier. 3076 /// 3077 /// \returns true if an error occurred, false otherwise. 3078 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3079 CXXScopeSpec &SS); 3080 3081 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3082 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3083 3084 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3085 SourceLocation IdLoc, 3086 IdentifierInfo &II, 3087 ParsedType ObjectType); 3088 3089 bool BuildCXXNestedNameSpecifier(Scope *S, 3090 IdentifierInfo &Identifier, 3091 SourceLocation IdentifierLoc, 3092 SourceLocation CCLoc, 3093 QualType ObjectType, 3094 bool EnteringContext, 3095 CXXScopeSpec &SS, 3096 NamedDecl *ScopeLookupResult, 3097 bool ErrorRecoveryLookup); 3098 3099 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3100 /// 3101 /// \param S The scope in which this nested-name-specifier occurs. 3102 /// 3103 /// \param Identifier The identifier preceding the '::'. 3104 /// 3105 /// \param IdentifierLoc The location of the identifier. 3106 /// 3107 /// \param CCLoc The location of the '::'. 3108 /// 3109 /// \param ObjectType The type of the object, if we're parsing 3110 /// nested-name-specifier in a member access expression. 3111 /// 3112 /// \param EnteringContext Whether we're entering the context nominated by 3113 /// this nested-name-specifier. 3114 /// 3115 /// \param SS The nested-name-specifier, which is both an input 3116 /// parameter (the nested-name-specifier before this type) and an 3117 /// output parameter (containing the full nested-name-specifier, 3118 /// including this new type). 3119 /// 3120 /// \returns true if an error occurred, false otherwise. 3121 bool ActOnCXXNestedNameSpecifier(Scope *S, 3122 IdentifierInfo &Identifier, 3123 SourceLocation IdentifierLoc, 3124 SourceLocation CCLoc, 3125 ParsedType ObjectType, 3126 bool EnteringContext, 3127 CXXScopeSpec &SS); 3128 3129 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3130 IdentifierInfo &Identifier, 3131 SourceLocation IdentifierLoc, 3132 SourceLocation ColonLoc, 3133 ParsedType ObjectType, 3134 bool EnteringContext); 3135 3136 /// \brief The parser has parsed a nested-name-specifier 3137 /// 'template[opt] template-name < template-args >::'. 3138 /// 3139 /// \param S The scope in which this nested-name-specifier occurs. 3140 /// 3141 /// \param TemplateLoc The location of the 'template' keyword, if any. 3142 /// 3143 /// \param SS The nested-name-specifier, which is both an input 3144 /// parameter (the nested-name-specifier before this type) and an 3145 /// output parameter (containing the full nested-name-specifier, 3146 /// including this new type). 3147 /// 3148 /// \param TemplateLoc the location of the 'template' keyword, if any. 3149 /// \param TemplateName The template name. 3150 /// \param TemplateNameLoc The location of the template name. 3151 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3152 /// \param TemplateArgs The template arguments. 3153 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3154 /// \param CCLoc The location of the '::'. 3155 3156 /// \param EnteringContext Whether we're entering the context of the 3157 /// nested-name-specifier. 3158 /// 3159 /// 3160 /// \returns true if an error occurred, false otherwise. 3161 bool ActOnCXXNestedNameSpecifier(Scope *S, 3162 SourceLocation TemplateLoc, 3163 CXXScopeSpec &SS, 3164 TemplateTy Template, 3165 SourceLocation TemplateNameLoc, 3166 SourceLocation LAngleLoc, 3167 ASTTemplateArgsPtr TemplateArgs, 3168 SourceLocation RAngleLoc, 3169 SourceLocation CCLoc, 3170 bool EnteringContext); 3171 3172 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3173 /// that the parser can use later to reconstruct the given 3174 /// nested-name-specifier. 3175 /// 3176 /// \param SS A nested-name-specifier. 3177 /// 3178 /// \returns A pointer containing all of the information in the 3179 /// nested-name-specifier \p SS. 3180 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3181 3182 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3183 /// the nested-name-specifier structure. 3184 /// 3185 /// \param Annotation The annotation pointer, produced by 3186 /// \c SaveNestedNameSpecifierAnnotation(). 3187 /// 3188 /// \param AnnotationRange The source range corresponding to the annotation. 3189 /// 3190 /// \param SS The nested-name-specifier that will be updated with the contents 3191 /// of the annotation pointer. 3192 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3193 SourceRange AnnotationRange, 3194 CXXScopeSpec &SS); 3195 3196 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3197 3198 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3199 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3200 /// After this method is called, according to [C++ 3.4.3p3], names should be 3201 /// looked up in the declarator-id's scope, until the declarator is parsed and 3202 /// ActOnCXXExitDeclaratorScope is called. 3203 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3204 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3205 3206 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3207 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3208 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3209 /// Used to indicate that names should revert to being looked up in the 3210 /// defining scope. 3211 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3212 3213 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3214 /// initializer for the declaration 'Dcl'. 3215 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3216 /// static data member of class X, names should be looked up in the scope of 3217 /// class X. 3218 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3219 3220 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3221 /// initializer for the declaration 'Dcl'. 3222 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3223 3224 // ParseObjCStringLiteral - Parse Objective-C string literals. 3225 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3226 Expr **Strings, 3227 unsigned NumStrings); 3228 3229 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3230 TypeSourceInfo *EncodedTypeInfo, 3231 SourceLocation RParenLoc); 3232 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3233 CXXMethodDecl *Method); 3234 3235 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3236 SourceLocation EncodeLoc, 3237 SourceLocation LParenLoc, 3238 ParsedType Ty, 3239 SourceLocation RParenLoc); 3240 3241 // ParseObjCSelectorExpression - Build selector expression for @selector 3242 ExprResult ParseObjCSelectorExpression(Selector Sel, 3243 SourceLocation AtLoc, 3244 SourceLocation SelLoc, 3245 SourceLocation LParenLoc, 3246 SourceLocation RParenLoc); 3247 3248 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3249 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3250 SourceLocation AtLoc, 3251 SourceLocation ProtoLoc, 3252 SourceLocation LParenLoc, 3253 SourceLocation RParenLoc); 3254 3255 //===--------------------------------------------------------------------===// 3256 // C++ Declarations 3257 // 3258 Decl *ActOnStartLinkageSpecification(Scope *S, 3259 SourceLocation ExternLoc, 3260 SourceLocation LangLoc, 3261 llvm::StringRef Lang, 3262 SourceLocation LBraceLoc); 3263 Decl *ActOnFinishLinkageSpecification(Scope *S, 3264 Decl *LinkageSpec, 3265 SourceLocation RBraceLoc); 3266 3267 3268 //===--------------------------------------------------------------------===// 3269 // C++ Classes 3270 // 3271 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3272 const CXXScopeSpec *SS = 0); 3273 3274 Decl *ActOnAccessSpecifier(AccessSpecifier Access, 3275 SourceLocation ASLoc, 3276 SourceLocation ColonLoc); 3277 3278 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3279 Declarator &D, 3280 MultiTemplateParamsArg TemplateParameterLists, 3281 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3282 Expr *Init, bool HasDeferredInit, 3283 bool IsDefinition); 3284 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3285 Expr *Init); 3286 3287 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3288 Scope *S, 3289 CXXScopeSpec &SS, 3290 IdentifierInfo *MemberOrBase, 3291 ParsedType TemplateTypeTy, 3292 SourceLocation IdLoc, 3293 SourceLocation LParenLoc, 3294 Expr **Args, unsigned NumArgs, 3295 SourceLocation RParenLoc, 3296 SourceLocation EllipsisLoc); 3297 3298 MemInitResult BuildMemberInitializer(ValueDecl *Member, Expr **Args, 3299 unsigned NumArgs, SourceLocation IdLoc, 3300 SourceLocation LParenLoc, 3301 SourceLocation RParenLoc); 3302 3303 MemInitResult BuildBaseInitializer(QualType BaseType, 3304 TypeSourceInfo *BaseTInfo, 3305 Expr **Args, unsigned NumArgs, 3306 SourceLocation LParenLoc, 3307 SourceLocation RParenLoc, 3308 CXXRecordDecl *ClassDecl, 3309 SourceLocation EllipsisLoc); 3310 3311 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3312 Expr **Args, unsigned NumArgs, 3313 SourceLocation BaseLoc, 3314 SourceLocation RParenLoc, 3315 SourceLocation LParenLoc, 3316 CXXRecordDecl *ClassDecl); 3317 3318 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3319 CXXCtorInitializer *Initializer); 3320 3321 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3322 CXXCtorInitializer **Initializers, 3323 unsigned NumInitializers, bool AnyErrors); 3324 3325 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3326 3327 3328 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3329 /// mark all the non-trivial destructors of its members and bases as 3330 /// referenced. 3331 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3332 CXXRecordDecl *Record); 3333 3334 /// \brief The list of classes whose vtables have been used within 3335 /// this translation unit, and the source locations at which the 3336 /// first use occurred. 3337 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3338 3339 /// \brief The list of vtables that are required but have not yet been 3340 /// materialized. 3341 llvm::SmallVector<VTableUse, 16> VTableUses; 3342 3343 /// \brief The set of classes whose vtables have been used within 3344 /// this translation unit, and a bit that will be true if the vtable is 3345 /// required to be emitted (otherwise, it should be emitted only if needed 3346 /// by code generation). 3347 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3348 3349 /// \brief A list of all of the dynamic classes in this translation 3350 /// unit. 3351 llvm::SmallVector<CXXRecordDecl *, 16> DynamicClasses; 3352 3353 /// \brief Note that the vtable for the given class was used at the 3354 /// given location. 3355 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3356 bool DefinitionRequired = false); 3357 3358 /// MarkVirtualMembersReferenced - Will mark all members of the given 3359 /// CXXRecordDecl referenced. 3360 void MarkVirtualMembersReferenced(SourceLocation Loc, 3361 const CXXRecordDecl *RD); 3362 3363 /// \brief Define all of the vtables that have been used in this 3364 /// translation unit and reference any virtual members used by those 3365 /// vtables. 3366 /// 3367 /// \returns true if any work was done, false otherwise. 3368 bool DefineUsedVTables(); 3369 3370 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3371 3372 void ActOnMemInitializers(Decl *ConstructorDecl, 3373 SourceLocation ColonLoc, 3374 MemInitTy **MemInits, unsigned NumMemInits, 3375 bool AnyErrors); 3376 3377 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3378 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3379 Decl *TagDecl, 3380 SourceLocation LBrac, 3381 SourceLocation RBrac, 3382 AttributeList *AttrList); 3383 3384 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3385 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3386 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3387 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3388 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3389 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3390 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3391 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3392 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3393 bool IsInsideALocalClassWithinATemplateFunction(); 3394 3395 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3396 Expr *AssertExpr, 3397 Expr *AssertMessageExpr, 3398 SourceLocation RParenLoc); 3399 3400 FriendDecl *CheckFriendTypeDecl(SourceLocation FriendLoc, 3401 TypeSourceInfo *TSInfo); 3402 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3403 MultiTemplateParamsArg TemplateParams); 3404 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, bool IsDefinition, 3405 MultiTemplateParamsArg TemplateParams); 3406 3407 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3408 StorageClass& SC); 3409 void CheckConstructor(CXXConstructorDecl *Constructor); 3410 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3411 StorageClass& SC); 3412 bool CheckDestructor(CXXDestructorDecl *Destructor); 3413 void CheckConversionDeclarator(Declarator &D, QualType &R, 3414 StorageClass& SC); 3415 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3416 3417 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3418 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3419 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3420 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3421 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3422 3423 //===--------------------------------------------------------------------===// 3424 // C++ Derived Classes 3425 // 3426 3427 /// ActOnBaseSpecifier - Parsed a base specifier 3428 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3429 SourceRange SpecifierRange, 3430 bool Virtual, AccessSpecifier Access, 3431 TypeSourceInfo *TInfo, 3432 SourceLocation EllipsisLoc); 3433 3434 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3435 SourceRange SpecifierRange, 3436 bool Virtual, AccessSpecifier Access, 3437 ParsedType basetype, 3438 SourceLocation BaseLoc, 3439 SourceLocation EllipsisLoc); 3440 3441 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3442 unsigned NumBases); 3443 void ActOnBaseSpecifiers(Decl *ClassDecl, BaseTy **Bases, unsigned NumBases); 3444 3445 bool IsDerivedFrom(QualType Derived, QualType Base); 3446 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3447 3448 // FIXME: I don't like this name. 3449 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3450 3451 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3452 3453 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3454 SourceLocation Loc, SourceRange Range, 3455 CXXCastPath *BasePath = 0, 3456 bool IgnoreAccess = false); 3457 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3458 unsigned InaccessibleBaseID, 3459 unsigned AmbigiousBaseConvID, 3460 SourceLocation Loc, SourceRange Range, 3461 DeclarationName Name, 3462 CXXCastPath *BasePath); 3463 3464 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3465 3466 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3467 /// covariant, according to C++ [class.virtual]p5. 3468 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3469 const CXXMethodDecl *Old); 3470 3471 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3472 /// spec is a subset of base spec. 3473 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3474 const CXXMethodDecl *Old); 3475 3476 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3477 3478 /// CheckOverrideControl - Check C++0x override control semantics. 3479 void CheckOverrideControl(const Decl *D); 3480 3481 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3482 /// overrides a virtual member function marked 'final', according to 3483 /// C++0x [class.virtual]p3. 3484 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3485 const CXXMethodDecl *Old); 3486 3487 3488 //===--------------------------------------------------------------------===// 3489 // C++ Access Control 3490 // 3491 3492 enum AccessResult { 3493 AR_accessible, 3494 AR_inaccessible, 3495 AR_dependent, 3496 AR_delayed 3497 }; 3498 3499 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3500 NamedDecl *PrevMemberDecl, 3501 AccessSpecifier LexicalAS); 3502 3503 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3504 DeclAccessPair FoundDecl); 3505 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3506 DeclAccessPair FoundDecl); 3507 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3508 SourceRange PlacementRange, 3509 CXXRecordDecl *NamingClass, 3510 DeclAccessPair FoundDecl, 3511 bool Diagnose = true); 3512 AccessResult CheckConstructorAccess(SourceLocation Loc, 3513 CXXConstructorDecl *D, 3514 const InitializedEntity &Entity, 3515 AccessSpecifier Access, 3516 bool IsCopyBindingRefToTemp = false); 3517 AccessResult CheckConstructorAccess(SourceLocation Loc, 3518 CXXConstructorDecl *D, 3519 AccessSpecifier Access, 3520 PartialDiagnostic PD); 3521 AccessResult CheckDestructorAccess(SourceLocation Loc, 3522 CXXDestructorDecl *Dtor, 3523 const PartialDiagnostic &PDiag); 3524 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3525 NamedDecl *D, 3526 const PartialDiagnostic &PDiag); 3527 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3528 Expr *ObjectExpr, 3529 Expr *ArgExpr, 3530 DeclAccessPair FoundDecl); 3531 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3532 DeclAccessPair FoundDecl); 3533 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3534 QualType Base, QualType Derived, 3535 const CXXBasePath &Path, 3536 unsigned DiagID, 3537 bool ForceCheck = false, 3538 bool ForceUnprivileged = false); 3539 void CheckLookupAccess(const LookupResult &R); 3540 3541 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3542 const MultiLevelTemplateArgumentList &TemplateArgs); 3543 void PerformDependentDiagnostics(const DeclContext *Pattern, 3544 const MultiLevelTemplateArgumentList &TemplateArgs); 3545 3546 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3547 3548 /// A flag to suppress access checking. 3549 bool SuppressAccessChecking; 3550 3551 /// \brief When true, access checking violations are treated as SFINAE 3552 /// failures rather than hard errors. 3553 bool AccessCheckingSFINAE; 3554 3555 void ActOnStartSuppressingAccessChecks(); 3556 void ActOnStopSuppressingAccessChecks(); 3557 3558 enum AbstractDiagSelID { 3559 AbstractNone = -1, 3560 AbstractReturnType, 3561 AbstractParamType, 3562 AbstractVariableType, 3563 AbstractFieldType, 3564 AbstractArrayType 3565 }; 3566 3567 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3568 const PartialDiagnostic &PD); 3569 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3570 3571 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3572 AbstractDiagSelID SelID = AbstractNone); 3573 3574 //===--------------------------------------------------------------------===// 3575 // C++ Overloaded Operators [C++ 13.5] 3576 // 3577 3578 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3579 3580 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3581 3582 //===--------------------------------------------------------------------===// 3583 // C++ Templates [C++ 14] 3584 // 3585 void FilterAcceptableTemplateNames(LookupResult &R); 3586 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3587 3588 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3589 QualType ObjectType, bool EnteringContext, 3590 bool &MemberOfUnknownSpecialization); 3591 3592 TemplateNameKind isTemplateName(Scope *S, 3593 CXXScopeSpec &SS, 3594 bool hasTemplateKeyword, 3595 UnqualifiedId &Name, 3596 ParsedType ObjectType, 3597 bool EnteringContext, 3598 TemplateTy &Template, 3599 bool &MemberOfUnknownSpecialization); 3600 3601 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3602 SourceLocation IILoc, 3603 Scope *S, 3604 const CXXScopeSpec *SS, 3605 TemplateTy &SuggestedTemplate, 3606 TemplateNameKind &SuggestedKind); 3607 3608 bool DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3609 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3610 3611 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3612 SourceLocation EllipsisLoc, 3613 SourceLocation KeyLoc, 3614 IdentifierInfo *ParamName, 3615 SourceLocation ParamNameLoc, 3616 unsigned Depth, unsigned Position, 3617 SourceLocation EqualLoc, 3618 ParsedType DefaultArg); 3619 3620 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3621 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3622 unsigned Depth, 3623 unsigned Position, 3624 SourceLocation EqualLoc, 3625 Expr *DefaultArg); 3626 Decl *ActOnTemplateTemplateParameter(Scope *S, 3627 SourceLocation TmpLoc, 3628 TemplateParamsTy *Params, 3629 SourceLocation EllipsisLoc, 3630 IdentifierInfo *ParamName, 3631 SourceLocation ParamNameLoc, 3632 unsigned Depth, 3633 unsigned Position, 3634 SourceLocation EqualLoc, 3635 ParsedTemplateArgument DefaultArg); 3636 3637 TemplateParamsTy * 3638 ActOnTemplateParameterList(unsigned Depth, 3639 SourceLocation ExportLoc, 3640 SourceLocation TemplateLoc, 3641 SourceLocation LAngleLoc, 3642 Decl **Params, unsigned NumParams, 3643 SourceLocation RAngleLoc); 3644 3645 /// \brief The context in which we are checking a template parameter 3646 /// list. 3647 enum TemplateParamListContext { 3648 TPC_ClassTemplate, 3649 TPC_FunctionTemplate, 3650 TPC_ClassTemplateMember, 3651 TPC_FriendFunctionTemplate, 3652 TPC_FriendFunctionTemplateDefinition, 3653 TPC_TypeAliasTemplate 3654 }; 3655 3656 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3657 TemplateParameterList *OldParams, 3658 TemplateParamListContext TPC); 3659 TemplateParameterList * 3660 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3661 SourceLocation DeclLoc, 3662 const CXXScopeSpec &SS, 3663 TemplateParameterList **ParamLists, 3664 unsigned NumParamLists, 3665 bool IsFriend, 3666 bool &IsExplicitSpecialization, 3667 bool &Invalid); 3668 3669 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3670 SourceLocation KWLoc, CXXScopeSpec &SS, 3671 IdentifierInfo *Name, SourceLocation NameLoc, 3672 AttributeList *Attr, 3673 TemplateParameterList *TemplateParams, 3674 AccessSpecifier AS, 3675 unsigned NumOuterTemplateParamLists, 3676 TemplateParameterList **OuterTemplateParamLists); 3677 3678 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3679 TemplateArgumentListInfo &Out); 3680 3681 void NoteAllFoundTemplates(TemplateName Name); 3682 3683 QualType CheckTemplateIdType(TemplateName Template, 3684 SourceLocation TemplateLoc, 3685 TemplateArgumentListInfo &TemplateArgs); 3686 3687 TypeResult 3688 ActOnTemplateIdType(CXXScopeSpec &SS, 3689 TemplateTy Template, SourceLocation TemplateLoc, 3690 SourceLocation LAngleLoc, 3691 ASTTemplateArgsPtr TemplateArgs, 3692 SourceLocation RAngleLoc); 3693 3694 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3695 /// such as \c class T::template apply<U>. 3696 /// 3697 /// \param TUK 3698 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3699 TypeSpecifierType TagSpec, 3700 SourceLocation TagLoc, 3701 CXXScopeSpec &SS, 3702 TemplateTy TemplateD, 3703 SourceLocation TemplateLoc, 3704 SourceLocation LAngleLoc, 3705 ASTTemplateArgsPtr TemplateArgsIn, 3706 SourceLocation RAngleLoc); 3707 3708 3709 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3710 LookupResult &R, 3711 bool RequiresADL, 3712 const TemplateArgumentListInfo &TemplateArgs); 3713 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3714 const DeclarationNameInfo &NameInfo, 3715 const TemplateArgumentListInfo &TemplateArgs); 3716 3717 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3718 SourceLocation TemplateKWLoc, 3719 CXXScopeSpec &SS, 3720 UnqualifiedId &Name, 3721 ParsedType ObjectType, 3722 bool EnteringContext, 3723 TemplateTy &Template); 3724 3725 DeclResult 3726 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3727 SourceLocation KWLoc, 3728 CXXScopeSpec &SS, 3729 TemplateTy Template, 3730 SourceLocation TemplateNameLoc, 3731 SourceLocation LAngleLoc, 3732 ASTTemplateArgsPtr TemplateArgs, 3733 SourceLocation RAngleLoc, 3734 AttributeList *Attr, 3735 MultiTemplateParamsArg TemplateParameterLists); 3736 3737 Decl *ActOnTemplateDeclarator(Scope *S, 3738 MultiTemplateParamsArg TemplateParameterLists, 3739 Declarator &D); 3740 3741 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3742 MultiTemplateParamsArg TemplateParameterLists, 3743 Declarator &D); 3744 3745 bool 3746 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3747 TemplateSpecializationKind NewTSK, 3748 NamedDecl *PrevDecl, 3749 TemplateSpecializationKind PrevTSK, 3750 SourceLocation PrevPtOfInstantiation, 3751 bool &SuppressNew); 3752 3753 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3754 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3755 LookupResult &Previous); 3756 3757 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 3758 TemplateArgumentListInfo *ExplicitTemplateArgs, 3759 LookupResult &Previous); 3760 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 3761 3762 DeclResult 3763 ActOnExplicitInstantiation(Scope *S, 3764 SourceLocation ExternLoc, 3765 SourceLocation TemplateLoc, 3766 unsigned TagSpec, 3767 SourceLocation KWLoc, 3768 const CXXScopeSpec &SS, 3769 TemplateTy Template, 3770 SourceLocation TemplateNameLoc, 3771 SourceLocation LAngleLoc, 3772 ASTTemplateArgsPtr TemplateArgs, 3773 SourceLocation RAngleLoc, 3774 AttributeList *Attr); 3775 3776 DeclResult 3777 ActOnExplicitInstantiation(Scope *S, 3778 SourceLocation ExternLoc, 3779 SourceLocation TemplateLoc, 3780 unsigned TagSpec, 3781 SourceLocation KWLoc, 3782 CXXScopeSpec &SS, 3783 IdentifierInfo *Name, 3784 SourceLocation NameLoc, 3785 AttributeList *Attr); 3786 3787 DeclResult ActOnExplicitInstantiation(Scope *S, 3788 SourceLocation ExternLoc, 3789 SourceLocation TemplateLoc, 3790 Declarator &D); 3791 3792 TemplateArgumentLoc 3793 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 3794 SourceLocation TemplateLoc, 3795 SourceLocation RAngleLoc, 3796 Decl *Param, 3797 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3798 3799 /// \brief Specifies the context in which a particular template 3800 /// argument is being checked. 3801 enum CheckTemplateArgumentKind { 3802 /// \brief The template argument was specified in the code or was 3803 /// instantiated with some deduced template arguments. 3804 CTAK_Specified, 3805 3806 /// \brief The template argument was deduced via template argument 3807 /// deduction. 3808 CTAK_Deduced, 3809 3810 /// \brief The template argument was deduced from an array bound 3811 /// via template argument deduction. 3812 CTAK_DeducedFromArrayBound 3813 }; 3814 3815 bool CheckTemplateArgument(NamedDecl *Param, 3816 const TemplateArgumentLoc &Arg, 3817 NamedDecl *Template, 3818 SourceLocation TemplateLoc, 3819 SourceLocation RAngleLoc, 3820 unsigned ArgumentPackIndex, 3821 llvm::SmallVectorImpl<TemplateArgument> &Converted, 3822 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3823 3824 /// \brief Check that the given template arguments can be be provided to 3825 /// the given template, converting the arguments along the way. 3826 /// 3827 /// \param Template The template to which the template arguments are being 3828 /// provided. 3829 /// 3830 /// \param TemplateLoc The location of the template name in the source. 3831 /// 3832 /// \param TemplateArgs The list of template arguments. If the template is 3833 /// a template template parameter, this function may extend the set of 3834 /// template arguments to also include substituted, defaulted template 3835 /// arguments. 3836 /// 3837 /// \param PartialTemplateArgs True if the list of template arguments is 3838 /// intentionally partial, e.g., because we're checking just the initial 3839 /// set of template arguments. 3840 /// 3841 /// \param Converted Will receive the converted, canonicalized template 3842 /// arguments. 3843 /// 3844 /// \returns True if an error occurred, false otherwise. 3845 bool CheckTemplateArgumentList(TemplateDecl *Template, 3846 SourceLocation TemplateLoc, 3847 TemplateArgumentListInfo &TemplateArgs, 3848 bool PartialTemplateArgs, 3849 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3850 3851 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 3852 const TemplateArgumentLoc &Arg, 3853 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3854 3855 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 3856 TypeSourceInfo *Arg); 3857 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 3858 TemplateArgument &Converted); 3859 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 3860 QualType InstantiatedParamType, Expr *Arg, 3861 TemplateArgument &Converted, 3862 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3863 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 3864 const TemplateArgumentLoc &Arg); 3865 3866 ExprResult 3867 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 3868 QualType ParamType, 3869 SourceLocation Loc); 3870 ExprResult 3871 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 3872 SourceLocation Loc); 3873 3874 /// \brief Enumeration describing how template parameter lists are compared 3875 /// for equality. 3876 enum TemplateParameterListEqualKind { 3877 /// \brief We are matching the template parameter lists of two templates 3878 /// that might be redeclarations. 3879 /// 3880 /// \code 3881 /// template<typename T> struct X; 3882 /// template<typename T> struct X; 3883 /// \endcode 3884 TPL_TemplateMatch, 3885 3886 /// \brief We are matching the template parameter lists of two template 3887 /// template parameters as part of matching the template parameter lists 3888 /// of two templates that might be redeclarations. 3889 /// 3890 /// \code 3891 /// template<template<int I> class TT> struct X; 3892 /// template<template<int Value> class Other> struct X; 3893 /// \endcode 3894 TPL_TemplateTemplateParmMatch, 3895 3896 /// \brief We are matching the template parameter lists of a template 3897 /// template argument against the template parameter lists of a template 3898 /// template parameter. 3899 /// 3900 /// \code 3901 /// template<template<int Value> class Metafun> struct X; 3902 /// template<int Value> struct integer_c; 3903 /// X<integer_c> xic; 3904 /// \endcode 3905 TPL_TemplateTemplateArgumentMatch 3906 }; 3907 3908 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 3909 TemplateParameterList *Old, 3910 bool Complain, 3911 TemplateParameterListEqualKind Kind, 3912 SourceLocation TemplateArgLoc 3913 = SourceLocation()); 3914 3915 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 3916 3917 /// \brief Called when the parser has parsed a C++ typename 3918 /// specifier, e.g., "typename T::type". 3919 /// 3920 /// \param S The scope in which this typename type occurs. 3921 /// \param TypenameLoc the location of the 'typename' keyword 3922 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3923 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 3924 /// \param IdLoc the location of the identifier. 3925 TypeResult 3926 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3927 const CXXScopeSpec &SS, const IdentifierInfo &II, 3928 SourceLocation IdLoc); 3929 3930 /// \brief Called when the parser has parsed a C++ typename 3931 /// specifier that ends in a template-id, e.g., 3932 /// "typename MetaFun::template apply<T1, T2>". 3933 /// 3934 /// \param S The scope in which this typename type occurs. 3935 /// \param TypenameLoc the location of the 'typename' keyword 3936 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3937 /// \param TemplateLoc the location of the 'template' keyword, if any. 3938 /// \param TemplateName The template name. 3939 /// \param TemplateNameLoc The location of the template name. 3940 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3941 /// \param TemplateArgs The template arguments. 3942 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3943 TypeResult 3944 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3945 const CXXScopeSpec &SS, 3946 SourceLocation TemplateLoc, 3947 TemplateTy Template, 3948 SourceLocation TemplateNameLoc, 3949 SourceLocation LAngleLoc, 3950 ASTTemplateArgsPtr TemplateArgs, 3951 SourceLocation RAngleLoc); 3952 3953 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 3954 SourceLocation KeywordLoc, 3955 NestedNameSpecifierLoc QualifierLoc, 3956 const IdentifierInfo &II, 3957 SourceLocation IILoc); 3958 3959 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 3960 SourceLocation Loc, 3961 DeclarationName Name); 3962 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 3963 3964 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 3965 3966 std::string 3967 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3968 const TemplateArgumentList &Args); 3969 3970 std::string 3971 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3972 const TemplateArgument *Args, 3973 unsigned NumArgs); 3974 3975 //===--------------------------------------------------------------------===// 3976 // C++ Variadic Templates (C++0x [temp.variadic]) 3977 //===--------------------------------------------------------------------===// 3978 3979 /// \brief The context in which an unexpanded parameter pack is 3980 /// being diagnosed. 3981 /// 3982 /// Note that the values of this enumeration line up with the first 3983 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 3984 enum UnexpandedParameterPackContext { 3985 /// \brief An arbitrary expression. 3986 UPPC_Expression = 0, 3987 3988 /// \brief The base type of a class type. 3989 UPPC_BaseType, 3990 3991 /// \brief The type of an arbitrary declaration. 3992 UPPC_DeclarationType, 3993 3994 /// \brief The type of a data member. 3995 UPPC_DataMemberType, 3996 3997 /// \brief The size of a bit-field. 3998 UPPC_BitFieldWidth, 3999 4000 /// \brief The expression in a static assertion. 4001 UPPC_StaticAssertExpression, 4002 4003 /// \brief The fixed underlying type of an enumeration. 4004 UPPC_FixedUnderlyingType, 4005 4006 /// \brief The enumerator value. 4007 UPPC_EnumeratorValue, 4008 4009 /// \brief A using declaration. 4010 UPPC_UsingDeclaration, 4011 4012 /// \brief A friend declaration. 4013 UPPC_FriendDeclaration, 4014 4015 /// \brief A declaration qualifier. 4016 UPPC_DeclarationQualifier, 4017 4018 /// \brief An initializer. 4019 UPPC_Initializer, 4020 4021 /// \brief A default argument. 4022 UPPC_DefaultArgument, 4023 4024 /// \brief The type of a non-type template parameter. 4025 UPPC_NonTypeTemplateParameterType, 4026 4027 /// \brief The type of an exception. 4028 UPPC_ExceptionType, 4029 4030 /// \brief Partial specialization. 4031 UPPC_PartialSpecialization 4032 }; 4033 4034 /// \brief If the given type contains an unexpanded parameter pack, 4035 /// diagnose the error. 4036 /// 4037 /// \param Loc The source location where a diagnostc should be emitted. 4038 /// 4039 /// \param T The type that is being checked for unexpanded parameter 4040 /// packs. 4041 /// 4042 /// \returns true if an error occurred, false otherwise. 4043 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4044 UnexpandedParameterPackContext UPPC); 4045 4046 /// \brief If the given expression contains an unexpanded parameter 4047 /// pack, diagnose the error. 4048 /// 4049 /// \param E The expression that is being checked for unexpanded 4050 /// parameter packs. 4051 /// 4052 /// \returns true if an error occurred, false otherwise. 4053 bool DiagnoseUnexpandedParameterPack(Expr *E, 4054 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4055 4056 /// \brief If the given nested-name-specifier contains an unexpanded 4057 /// parameter pack, diagnose the error. 4058 /// 4059 /// \param SS The nested-name-specifier that is being checked for 4060 /// unexpanded parameter packs. 4061 /// 4062 /// \returns true if an error occurred, false otherwise. 4063 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4064 UnexpandedParameterPackContext UPPC); 4065 4066 /// \brief If the given name contains an unexpanded parameter pack, 4067 /// diagnose the error. 4068 /// 4069 /// \param NameInfo The name (with source location information) that 4070 /// is being checked for unexpanded parameter packs. 4071 /// 4072 /// \returns true if an error occurred, false otherwise. 4073 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4074 UnexpandedParameterPackContext UPPC); 4075 4076 /// \brief If the given template name contains an unexpanded parameter pack, 4077 /// diagnose the error. 4078 /// 4079 /// \param Loc The location of the template name. 4080 /// 4081 /// \param Template The template name that is being checked for unexpanded 4082 /// parameter packs. 4083 /// 4084 /// \returns true if an error occurred, false otherwise. 4085 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4086 TemplateName Template, 4087 UnexpandedParameterPackContext UPPC); 4088 4089 /// \brief If the given template argument contains an unexpanded parameter 4090 /// pack, diagnose the error. 4091 /// 4092 /// \param Arg The template argument that is being checked for unexpanded 4093 /// parameter packs. 4094 /// 4095 /// \returns true if an error occurred, false otherwise. 4096 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4097 UnexpandedParameterPackContext UPPC); 4098 4099 /// \brief Collect the set of unexpanded parameter packs within the given 4100 /// template argument. 4101 /// 4102 /// \param Arg The template argument that will be traversed to find 4103 /// unexpanded parameter packs. 4104 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4105 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4106 4107 /// \brief Collect the set of unexpanded parameter packs within the given 4108 /// template argument. 4109 /// 4110 /// \param Arg The template argument that will be traversed to find 4111 /// unexpanded parameter packs. 4112 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4113 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4114 4115 /// \brief Collect the set of unexpanded parameter packs within the given 4116 /// type. 4117 /// 4118 /// \param T The type that will be traversed to find 4119 /// unexpanded parameter packs. 4120 void collectUnexpandedParameterPacks(QualType T, 4121 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4122 4123 /// \brief Collect the set of unexpanded parameter packs within the given 4124 /// type. 4125 /// 4126 /// \param TL The type that will be traversed to find 4127 /// unexpanded parameter packs. 4128 void collectUnexpandedParameterPacks(TypeLoc TL, 4129 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4130 4131 /// \brief Invoked when parsing a template argument followed by an 4132 /// ellipsis, which creates a pack expansion. 4133 /// 4134 /// \param Arg The template argument preceding the ellipsis, which 4135 /// may already be invalid. 4136 /// 4137 /// \param EllipsisLoc The location of the ellipsis. 4138 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4139 SourceLocation EllipsisLoc); 4140 4141 /// \brief Invoked when parsing a type followed by an ellipsis, which 4142 /// creates a pack expansion. 4143 /// 4144 /// \param Type The type preceding the ellipsis, which will become 4145 /// the pattern of the pack expansion. 4146 /// 4147 /// \param EllipsisLoc The location of the ellipsis. 4148 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4149 4150 /// \brief Construct a pack expansion type from the pattern of the pack 4151 /// expansion. 4152 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4153 SourceLocation EllipsisLoc, 4154 llvm::Optional<unsigned> NumExpansions); 4155 4156 /// \brief Construct a pack expansion type from the pattern of the pack 4157 /// expansion. 4158 QualType CheckPackExpansion(QualType Pattern, 4159 SourceRange PatternRange, 4160 SourceLocation EllipsisLoc, 4161 llvm::Optional<unsigned> NumExpansions); 4162 4163 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4164 /// creates a pack expansion. 4165 /// 4166 /// \param Pattern The expression preceding the ellipsis, which will become 4167 /// the pattern of the pack expansion. 4168 /// 4169 /// \param EllipsisLoc The location of the ellipsis. 4170 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4171 4172 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4173 /// creates a pack expansion. 4174 /// 4175 /// \param Pattern The expression preceding the ellipsis, which will become 4176 /// the pattern of the pack expansion. 4177 /// 4178 /// \param EllipsisLoc The location of the ellipsis. 4179 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4180 llvm::Optional<unsigned> NumExpansions); 4181 4182 /// \brief Determine whether we could expand a pack expansion with the 4183 /// given set of parameter packs into separate arguments by repeatedly 4184 /// transforming the pattern. 4185 /// 4186 /// \param EllipsisLoc The location of the ellipsis that identifies the 4187 /// pack expansion. 4188 /// 4189 /// \param PatternRange The source range that covers the entire pattern of 4190 /// the pack expansion. 4191 /// 4192 /// \param Unexpanded The set of unexpanded parameter packs within the 4193 /// pattern. 4194 /// 4195 /// \param NumUnexpanded The number of unexpanded parameter packs in 4196 /// \p Unexpanded. 4197 /// 4198 /// \param ShouldExpand Will be set to \c true if the transformer should 4199 /// expand the corresponding pack expansions into separate arguments. When 4200 /// set, \c NumExpansions must also be set. 4201 /// 4202 /// \param RetainExpansion Whether the caller should add an unexpanded 4203 /// pack expansion after all of the expanded arguments. This is used 4204 /// when extending explicitly-specified template argument packs per 4205 /// C++0x [temp.arg.explicit]p9. 4206 /// 4207 /// \param NumExpansions The number of separate arguments that will be in 4208 /// the expanded form of the corresponding pack expansion. This is both an 4209 /// input and an output parameter, which can be set by the caller if the 4210 /// number of expansions is known a priori (e.g., due to a prior substitution) 4211 /// and will be set by the callee when the number of expansions is known. 4212 /// The callee must set this value when \c ShouldExpand is \c true; it may 4213 /// set this value in other cases. 4214 /// 4215 /// \returns true if an error occurred (e.g., because the parameter packs 4216 /// are to be instantiated with arguments of different lengths), false 4217 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4218 /// must be set. 4219 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4220 SourceRange PatternRange, 4221 const UnexpandedParameterPack *Unexpanded, 4222 unsigned NumUnexpanded, 4223 const MultiLevelTemplateArgumentList &TemplateArgs, 4224 bool &ShouldExpand, 4225 bool &RetainExpansion, 4226 llvm::Optional<unsigned> &NumExpansions); 4227 4228 /// \brief Determine the number of arguments in the given pack expansion 4229 /// type. 4230 /// 4231 /// This routine already assumes that the pack expansion type can be 4232 /// expanded and that the number of arguments in the expansion is 4233 /// consistent across all of the unexpanded parameter packs in its pattern. 4234 unsigned getNumArgumentsInExpansion(QualType T, 4235 const MultiLevelTemplateArgumentList &TemplateArgs); 4236 4237 /// \brief Determine whether the given declarator contains any unexpanded 4238 /// parameter packs. 4239 /// 4240 /// This routine is used by the parser to disambiguate function declarators 4241 /// with an ellipsis prior to the ')', e.g., 4242 /// 4243 /// \code 4244 /// void f(T...); 4245 /// \endcode 4246 /// 4247 /// To determine whether we have an (unnamed) function parameter pack or 4248 /// a variadic function. 4249 /// 4250 /// \returns true if the declarator contains any unexpanded parameter packs, 4251 /// false otherwise. 4252 bool containsUnexpandedParameterPacks(Declarator &D); 4253 4254 //===--------------------------------------------------------------------===// 4255 // C++ Template Argument Deduction (C++ [temp.deduct]) 4256 //===--------------------------------------------------------------------===// 4257 4258 /// \brief Describes the result of template argument deduction. 4259 /// 4260 /// The TemplateDeductionResult enumeration describes the result of 4261 /// template argument deduction, as returned from 4262 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4263 /// structure provides additional information about the results of 4264 /// template argument deduction, e.g., the deduced template argument 4265 /// list (if successful) or the specific template parameters or 4266 /// deduced arguments that were involved in the failure. 4267 enum TemplateDeductionResult { 4268 /// \brief Template argument deduction was successful. 4269 TDK_Success = 0, 4270 /// \brief Template argument deduction exceeded the maximum template 4271 /// instantiation depth (which has already been diagnosed). 4272 TDK_InstantiationDepth, 4273 /// \brief Template argument deduction did not deduce a value 4274 /// for every template parameter. 4275 TDK_Incomplete, 4276 /// \brief Template argument deduction produced inconsistent 4277 /// deduced values for the given template parameter. 4278 TDK_Inconsistent, 4279 /// \brief Template argument deduction failed due to inconsistent 4280 /// cv-qualifiers on a template parameter type that would 4281 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4282 /// but were given a non-const "X". 4283 TDK_Underqualified, 4284 /// \brief Substitution of the deduced template argument values 4285 /// resulted in an error. 4286 TDK_SubstitutionFailure, 4287 /// \brief Substitution of the deduced template argument values 4288 /// into a non-deduced context produced a type or value that 4289 /// produces a type that does not match the original template 4290 /// arguments provided. 4291 TDK_NonDeducedMismatch, 4292 /// \brief When performing template argument deduction for a function 4293 /// template, there were too many call arguments. 4294 TDK_TooManyArguments, 4295 /// \brief When performing template argument deduction for a function 4296 /// template, there were too few call arguments. 4297 TDK_TooFewArguments, 4298 /// \brief The explicitly-specified template arguments were not valid 4299 /// template arguments for the given template. 4300 TDK_InvalidExplicitArguments, 4301 /// \brief The arguments included an overloaded function name that could 4302 /// not be resolved to a suitable function. 4303 TDK_FailedOverloadResolution 4304 }; 4305 4306 TemplateDeductionResult 4307 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4308 const TemplateArgumentList &TemplateArgs, 4309 sema::TemplateDeductionInfo &Info); 4310 4311 TemplateDeductionResult 4312 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4313 TemplateArgumentListInfo &ExplicitTemplateArgs, 4314 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4315 llvm::SmallVectorImpl<QualType> &ParamTypes, 4316 QualType *FunctionType, 4317 sema::TemplateDeductionInfo &Info); 4318 4319 /// brief A function argument from which we performed template argument 4320 // deduction for a call. 4321 struct OriginalCallArg { 4322 OriginalCallArg(QualType OriginalParamType, 4323 unsigned ArgIdx, 4324 QualType OriginalArgType) 4325 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4326 OriginalArgType(OriginalArgType) { } 4327 4328 QualType OriginalParamType; 4329 unsigned ArgIdx; 4330 QualType OriginalArgType; 4331 }; 4332 4333 TemplateDeductionResult 4334 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4335 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4336 unsigned NumExplicitlySpecified, 4337 FunctionDecl *&Specialization, 4338 sema::TemplateDeductionInfo &Info, 4339 llvm::SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4340 4341 TemplateDeductionResult 4342 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4343 TemplateArgumentListInfo *ExplicitTemplateArgs, 4344 Expr **Args, unsigned NumArgs, 4345 FunctionDecl *&Specialization, 4346 sema::TemplateDeductionInfo &Info); 4347 4348 TemplateDeductionResult 4349 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4350 TemplateArgumentListInfo *ExplicitTemplateArgs, 4351 QualType ArgFunctionType, 4352 FunctionDecl *&Specialization, 4353 sema::TemplateDeductionInfo &Info); 4354 4355 TemplateDeductionResult 4356 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4357 QualType ToType, 4358 CXXConversionDecl *&Specialization, 4359 sema::TemplateDeductionInfo &Info); 4360 4361 TemplateDeductionResult 4362 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4363 TemplateArgumentListInfo *ExplicitTemplateArgs, 4364 FunctionDecl *&Specialization, 4365 sema::TemplateDeductionInfo &Info); 4366 4367 bool DeduceAutoType(TypeSourceInfo *AutoType, Expr *Initializer, 4368 TypeSourceInfo *&Result); 4369 4370 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4371 FunctionTemplateDecl *FT2, 4372 SourceLocation Loc, 4373 TemplatePartialOrderingContext TPOC, 4374 unsigned NumCallArguments); 4375 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4376 UnresolvedSetIterator SEnd, 4377 TemplatePartialOrderingContext TPOC, 4378 unsigned NumCallArguments, 4379 SourceLocation Loc, 4380 const PartialDiagnostic &NoneDiag, 4381 const PartialDiagnostic &AmbigDiag, 4382 const PartialDiagnostic &CandidateDiag, 4383 bool Complain = true); 4384 4385 ClassTemplatePartialSpecializationDecl * 4386 getMoreSpecializedPartialSpecialization( 4387 ClassTemplatePartialSpecializationDecl *PS1, 4388 ClassTemplatePartialSpecializationDecl *PS2, 4389 SourceLocation Loc); 4390 4391 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4392 bool OnlyDeduced, 4393 unsigned Depth, 4394 llvm::SmallVectorImpl<bool> &Used); 4395 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4396 llvm::SmallVectorImpl<bool> &Deduced); 4397 4398 //===--------------------------------------------------------------------===// 4399 // C++ Template Instantiation 4400 // 4401 4402 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4403 const TemplateArgumentList *Innermost = 0, 4404 bool RelativeToPrimary = false, 4405 const FunctionDecl *Pattern = 0); 4406 4407 /// \brief A template instantiation that is currently in progress. 4408 struct ActiveTemplateInstantiation { 4409 /// \brief The kind of template instantiation we are performing 4410 enum InstantiationKind { 4411 /// We are instantiating a template declaration. The entity is 4412 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4413 TemplateInstantiation, 4414 4415 /// We are instantiating a default argument for a template 4416 /// parameter. The Entity is the template, and 4417 /// TemplateArgs/NumTemplateArguments provides the template 4418 /// arguments as specified. 4419 /// FIXME: Use a TemplateArgumentList 4420 DefaultTemplateArgumentInstantiation, 4421 4422 /// We are instantiating a default argument for a function. 4423 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4424 /// provides the template arguments as specified. 4425 DefaultFunctionArgumentInstantiation, 4426 4427 /// We are substituting explicit template arguments provided for 4428 /// a function template. The entity is a FunctionTemplateDecl. 4429 ExplicitTemplateArgumentSubstitution, 4430 4431 /// We are substituting template argument determined as part of 4432 /// template argument deduction for either a class template 4433 /// partial specialization or a function template. The 4434 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4435 /// a FunctionTemplateDecl. 4436 DeducedTemplateArgumentSubstitution, 4437 4438 /// We are substituting prior template arguments into a new 4439 /// template parameter. The template parameter itself is either a 4440 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4441 PriorTemplateArgumentSubstitution, 4442 4443 /// We are checking the validity of a default template argument that 4444 /// has been used when naming a template-id. 4445 DefaultTemplateArgumentChecking 4446 } Kind; 4447 4448 /// \brief The point of instantiation within the source code. 4449 SourceLocation PointOfInstantiation; 4450 4451 /// \brief The template (or partial specialization) in which we are 4452 /// performing the instantiation, for substitutions of prior template 4453 /// arguments. 4454 NamedDecl *Template; 4455 4456 /// \brief The entity that is being instantiated. 4457 uintptr_t Entity; 4458 4459 /// \brief The list of template arguments we are substituting, if they 4460 /// are not part of the entity. 4461 const TemplateArgument *TemplateArgs; 4462 4463 /// \brief The number of template arguments in TemplateArgs. 4464 unsigned NumTemplateArgs; 4465 4466 /// \brief The template deduction info object associated with the 4467 /// substitution or checking of explicit or deduced template arguments. 4468 sema::TemplateDeductionInfo *DeductionInfo; 4469 4470 /// \brief The source range that covers the construct that cause 4471 /// the instantiation, e.g., the template-id that causes a class 4472 /// template instantiation. 4473 SourceRange InstantiationRange; 4474 4475 ActiveTemplateInstantiation() 4476 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4477 NumTemplateArgs(0), DeductionInfo(0) {} 4478 4479 /// \brief Determines whether this template is an actual instantiation 4480 /// that should be counted toward the maximum instantiation depth. 4481 bool isInstantiationRecord() const; 4482 4483 friend bool operator==(const ActiveTemplateInstantiation &X, 4484 const ActiveTemplateInstantiation &Y) { 4485 if (X.Kind != Y.Kind) 4486 return false; 4487 4488 if (X.Entity != Y.Entity) 4489 return false; 4490 4491 switch (X.Kind) { 4492 case TemplateInstantiation: 4493 return true; 4494 4495 case PriorTemplateArgumentSubstitution: 4496 case DefaultTemplateArgumentChecking: 4497 if (X.Template != Y.Template) 4498 return false; 4499 4500 // Fall through 4501 4502 case DefaultTemplateArgumentInstantiation: 4503 case ExplicitTemplateArgumentSubstitution: 4504 case DeducedTemplateArgumentSubstitution: 4505 case DefaultFunctionArgumentInstantiation: 4506 return X.TemplateArgs == Y.TemplateArgs; 4507 4508 } 4509 4510 return true; 4511 } 4512 4513 friend bool operator!=(const ActiveTemplateInstantiation &X, 4514 const ActiveTemplateInstantiation &Y) { 4515 return !(X == Y); 4516 } 4517 }; 4518 4519 /// \brief List of active template instantiations. 4520 /// 4521 /// This vector is treated as a stack. As one template instantiation 4522 /// requires another template instantiation, additional 4523 /// instantiations are pushed onto the stack up to a 4524 /// user-configurable limit LangOptions::InstantiationDepth. 4525 llvm::SmallVector<ActiveTemplateInstantiation, 16> 4526 ActiveTemplateInstantiations; 4527 4528 /// \brief Whether we are in a SFINAE context that is not associated with 4529 /// template instantiation. 4530 /// 4531 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4532 /// of a template instantiation or template argument deduction. 4533 bool InNonInstantiationSFINAEContext; 4534 4535 /// \brief The number of ActiveTemplateInstantiation entries in 4536 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4537 /// therefore, should not be counted as part of the instantiation depth. 4538 unsigned NonInstantiationEntries; 4539 4540 /// \brief The last template from which a template instantiation 4541 /// error or warning was produced. 4542 /// 4543 /// This value is used to suppress printing of redundant template 4544 /// instantiation backtraces when there are multiple errors in the 4545 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4546 /// to implement it anywhere else. 4547 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4548 4549 /// \brief The current index into pack expansion arguments that will be 4550 /// used for substitution of parameter packs. 4551 /// 4552 /// The pack expansion index will be -1 to indicate that parameter packs 4553 /// should be instantiated as themselves. Otherwise, the index specifies 4554 /// which argument within the parameter pack will be used for substitution. 4555 int ArgumentPackSubstitutionIndex; 4556 4557 /// \brief RAII object used to change the argument pack substitution index 4558 /// within a \c Sema object. 4559 /// 4560 /// See \c ArgumentPackSubstitutionIndex for more information. 4561 class ArgumentPackSubstitutionIndexRAII { 4562 Sema &Self; 4563 int OldSubstitutionIndex; 4564 4565 public: 4566 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4567 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4568 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4569 } 4570 4571 ~ArgumentPackSubstitutionIndexRAII() { 4572 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4573 } 4574 }; 4575 4576 friend class ArgumentPackSubstitutionRAII; 4577 4578 /// \brief The stack of calls expression undergoing template instantiation. 4579 /// 4580 /// The top of this stack is used by a fixit instantiating unresolved 4581 /// function calls to fix the AST to match the textual change it prints. 4582 llvm::SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4583 4584 /// \brief For each declaration that involved template argument deduction, the 4585 /// set of diagnostics that were suppressed during that template argument 4586 /// deduction. 4587 /// 4588 /// FIXME: Serialize this structure to the AST file. 4589 llvm::DenseMap<Decl *, llvm::SmallVector<PartialDiagnosticAt, 1> > 4590 SuppressedDiagnostics; 4591 4592 /// \brief A stack object to be created when performing template 4593 /// instantiation. 4594 /// 4595 /// Construction of an object of type \c InstantiatingTemplate 4596 /// pushes the current instantiation onto the stack of active 4597 /// instantiations. If the size of this stack exceeds the maximum 4598 /// number of recursive template instantiations, construction 4599 /// produces an error and evaluates true. 4600 /// 4601 /// Destruction of this object will pop the named instantiation off 4602 /// the stack. 4603 struct InstantiatingTemplate { 4604 /// \brief Note that we are instantiating a class template, 4605 /// function template, or a member thereof. 4606 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4607 Decl *Entity, 4608 SourceRange InstantiationRange = SourceRange()); 4609 4610 /// \brief Note that we are instantiating a default argument in a 4611 /// template-id. 4612 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4613 TemplateDecl *Template, 4614 const TemplateArgument *TemplateArgs, 4615 unsigned NumTemplateArgs, 4616 SourceRange InstantiationRange = SourceRange()); 4617 4618 /// \brief Note that we are instantiating a default argument in a 4619 /// template-id. 4620 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4621 FunctionTemplateDecl *FunctionTemplate, 4622 const TemplateArgument *TemplateArgs, 4623 unsigned NumTemplateArgs, 4624 ActiveTemplateInstantiation::InstantiationKind Kind, 4625 sema::TemplateDeductionInfo &DeductionInfo, 4626 SourceRange InstantiationRange = SourceRange()); 4627 4628 /// \brief Note that we are instantiating as part of template 4629 /// argument deduction for a class template partial 4630 /// specialization. 4631 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4632 ClassTemplatePartialSpecializationDecl *PartialSpec, 4633 const TemplateArgument *TemplateArgs, 4634 unsigned NumTemplateArgs, 4635 sema::TemplateDeductionInfo &DeductionInfo, 4636 SourceRange InstantiationRange = SourceRange()); 4637 4638 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4639 ParmVarDecl *Param, 4640 const TemplateArgument *TemplateArgs, 4641 unsigned NumTemplateArgs, 4642 SourceRange InstantiationRange = SourceRange()); 4643 4644 /// \brief Note that we are substituting prior template arguments into a 4645 /// non-type or template template parameter. 4646 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4647 NamedDecl *Template, 4648 NonTypeTemplateParmDecl *Param, 4649 const TemplateArgument *TemplateArgs, 4650 unsigned NumTemplateArgs, 4651 SourceRange InstantiationRange); 4652 4653 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4654 NamedDecl *Template, 4655 TemplateTemplateParmDecl *Param, 4656 const TemplateArgument *TemplateArgs, 4657 unsigned NumTemplateArgs, 4658 SourceRange InstantiationRange); 4659 4660 /// \brief Note that we are checking the default template argument 4661 /// against the template parameter for a given template-id. 4662 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4663 TemplateDecl *Template, 4664 NamedDecl *Param, 4665 const TemplateArgument *TemplateArgs, 4666 unsigned NumTemplateArgs, 4667 SourceRange InstantiationRange); 4668 4669 4670 /// \brief Note that we have finished instantiating this template. 4671 void Clear(); 4672 4673 ~InstantiatingTemplate() { Clear(); } 4674 4675 /// \brief Determines whether we have exceeded the maximum 4676 /// recursive template instantiations. 4677 operator bool() const { return Invalid; } 4678 4679 private: 4680 Sema &SemaRef; 4681 bool Invalid; 4682 bool SavedInNonInstantiationSFINAEContext; 4683 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4684 SourceRange InstantiationRange); 4685 4686 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4687 4688 InstantiatingTemplate& 4689 operator=(const InstantiatingTemplate&); // not implemented 4690 }; 4691 4692 void PrintInstantiationStack(); 4693 4694 /// \brief Determines whether we are currently in a context where 4695 /// template argument substitution failures are not considered 4696 /// errors. 4697 /// 4698 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4699 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4700 /// template-deduction context object, which can be used to capture 4701 /// diagnostics that will be suppressed. 4702 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4703 4704 /// \brief RAII class used to determine whether SFINAE has 4705 /// trapped any errors that occur during template argument 4706 /// deduction.` 4707 class SFINAETrap { 4708 Sema &SemaRef; 4709 unsigned PrevSFINAEErrors; 4710 bool PrevInNonInstantiationSFINAEContext; 4711 bool PrevAccessCheckingSFINAE; 4712 4713 public: 4714 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 4715 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 4716 PrevInNonInstantiationSFINAEContext( 4717 SemaRef.InNonInstantiationSFINAEContext), 4718 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 4719 { 4720 if (!SemaRef.isSFINAEContext()) 4721 SemaRef.InNonInstantiationSFINAEContext = true; 4722 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 4723 } 4724 4725 ~SFINAETrap() { 4726 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 4727 SemaRef.InNonInstantiationSFINAEContext 4728 = PrevInNonInstantiationSFINAEContext; 4729 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 4730 } 4731 4732 /// \brief Determine whether any SFINAE errors have been trapped. 4733 bool hasErrorOccurred() const { 4734 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 4735 } 4736 }; 4737 4738 /// \brief The current instantiation scope used to store local 4739 /// variables. 4740 LocalInstantiationScope *CurrentInstantiationScope; 4741 4742 /// \brief The number of typos corrected by CorrectTypo. 4743 unsigned TyposCorrected; 4744 4745 typedef llvm::DenseMap<IdentifierInfo *, std::pair<llvm::StringRef, bool> > 4746 UnqualifiedTyposCorrectedMap; 4747 4748 /// \brief A cache containing the results of typo correction for unqualified 4749 /// name lookup. 4750 /// 4751 /// The string is the string that we corrected to (which may be empty, if 4752 /// there was no correction), while the boolean will be true when the 4753 /// string represents a keyword. 4754 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 4755 4756 /// \brief Worker object for performing CFG-based warnings. 4757 sema::AnalysisBasedWarnings AnalysisWarnings; 4758 4759 /// \brief An entity for which implicit template instantiation is required. 4760 /// 4761 /// The source location associated with the declaration is the first place in 4762 /// the source code where the declaration was "used". It is not necessarily 4763 /// the point of instantiation (which will be either before or after the 4764 /// namespace-scope declaration that triggered this implicit instantiation), 4765 /// However, it is the location that diagnostics should generally refer to, 4766 /// because users will need to know what code triggered the instantiation. 4767 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 4768 4769 /// \brief The queue of implicit template instantiations that are required 4770 /// but have not yet been performed. 4771 std::deque<PendingImplicitInstantiation> PendingInstantiations; 4772 4773 /// \brief The queue of implicit template instantiations that are required 4774 /// and must be performed within the current local scope. 4775 /// 4776 /// This queue is only used for member functions of local classes in 4777 /// templates, which must be instantiated in the same scope as their 4778 /// enclosing function, so that they can reference function-local 4779 /// types, static variables, enumerators, etc. 4780 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 4781 4782 void PerformPendingInstantiations(bool LocalOnly = false); 4783 4784 TypeSourceInfo *SubstType(TypeSourceInfo *T, 4785 const MultiLevelTemplateArgumentList &TemplateArgs, 4786 SourceLocation Loc, DeclarationName Entity); 4787 4788 QualType SubstType(QualType T, 4789 const MultiLevelTemplateArgumentList &TemplateArgs, 4790 SourceLocation Loc, DeclarationName Entity); 4791 4792 TypeSourceInfo *SubstType(TypeLoc TL, 4793 const MultiLevelTemplateArgumentList &TemplateArgs, 4794 SourceLocation Loc, DeclarationName Entity); 4795 4796 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 4797 const MultiLevelTemplateArgumentList &TemplateArgs, 4798 SourceLocation Loc, 4799 DeclarationName Entity); 4800 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 4801 const MultiLevelTemplateArgumentList &TemplateArgs, 4802 int indexAdjustment, 4803 llvm::Optional<unsigned> NumExpansions); 4804 bool SubstParmTypes(SourceLocation Loc, 4805 ParmVarDecl **Params, unsigned NumParams, 4806 const MultiLevelTemplateArgumentList &TemplateArgs, 4807 llvm::SmallVectorImpl<QualType> &ParamTypes, 4808 llvm::SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 4809 ExprResult SubstExpr(Expr *E, 4810 const MultiLevelTemplateArgumentList &TemplateArgs); 4811 4812 /// \brief Substitute the given template arguments into a list of 4813 /// expressions, expanding pack expansions if required. 4814 /// 4815 /// \param Exprs The list of expressions to substitute into. 4816 /// 4817 /// \param NumExprs The number of expressions in \p Exprs. 4818 /// 4819 /// \param IsCall Whether this is some form of call, in which case 4820 /// default arguments will be dropped. 4821 /// 4822 /// \param TemplateArgs The set of template arguments to substitute. 4823 /// 4824 /// \param Outputs Will receive all of the substituted arguments. 4825 /// 4826 /// \returns true if an error occurred, false otherwise. 4827 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 4828 const MultiLevelTemplateArgumentList &TemplateArgs, 4829 llvm::SmallVectorImpl<Expr *> &Outputs); 4830 4831 StmtResult SubstStmt(Stmt *S, 4832 const MultiLevelTemplateArgumentList &TemplateArgs); 4833 4834 Decl *SubstDecl(Decl *D, DeclContext *Owner, 4835 const MultiLevelTemplateArgumentList &TemplateArgs); 4836 4837 bool 4838 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 4839 CXXRecordDecl *Pattern, 4840 const MultiLevelTemplateArgumentList &TemplateArgs); 4841 4842 bool 4843 InstantiateClass(SourceLocation PointOfInstantiation, 4844 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 4845 const MultiLevelTemplateArgumentList &TemplateArgs, 4846 TemplateSpecializationKind TSK, 4847 bool Complain = true); 4848 4849 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 4850 Decl *Pattern, Decl *Inst); 4851 4852 bool 4853 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 4854 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4855 TemplateSpecializationKind TSK, 4856 bool Complain = true); 4857 4858 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 4859 CXXRecordDecl *Instantiation, 4860 const MultiLevelTemplateArgumentList &TemplateArgs, 4861 TemplateSpecializationKind TSK); 4862 4863 void InstantiateClassTemplateSpecializationMembers( 4864 SourceLocation PointOfInstantiation, 4865 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4866 TemplateSpecializationKind TSK); 4867 4868 NestedNameSpecifierLoc 4869 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 4870 const MultiLevelTemplateArgumentList &TemplateArgs); 4871 4872 DeclarationNameInfo 4873 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 4874 const MultiLevelTemplateArgumentList &TemplateArgs); 4875 TemplateName 4876 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 4877 SourceLocation Loc, 4878 const MultiLevelTemplateArgumentList &TemplateArgs); 4879 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 4880 TemplateArgumentListInfo &Result, 4881 const MultiLevelTemplateArgumentList &TemplateArgs); 4882 4883 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 4884 FunctionDecl *Function, 4885 bool Recursive = false, 4886 bool DefinitionRequired = false); 4887 void InstantiateStaticDataMemberDefinition( 4888 SourceLocation PointOfInstantiation, 4889 VarDecl *Var, 4890 bool Recursive = false, 4891 bool DefinitionRequired = false); 4892 4893 void InstantiateMemInitializers(CXXConstructorDecl *New, 4894 const CXXConstructorDecl *Tmpl, 4895 const MultiLevelTemplateArgumentList &TemplateArgs); 4896 4897 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 4898 const MultiLevelTemplateArgumentList &TemplateArgs); 4899 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 4900 const MultiLevelTemplateArgumentList &TemplateArgs); 4901 4902 // Objective-C declarations. 4903 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 4904 IdentifierInfo *ClassName, 4905 SourceLocation ClassLoc, 4906 IdentifierInfo *SuperName, 4907 SourceLocation SuperLoc, 4908 Decl * const *ProtoRefs, 4909 unsigned NumProtoRefs, 4910 const SourceLocation *ProtoLocs, 4911 SourceLocation EndProtoLoc, 4912 AttributeList *AttrList); 4913 4914 Decl *ActOnCompatiblityAlias( 4915 SourceLocation AtCompatibilityAliasLoc, 4916 IdentifierInfo *AliasName, SourceLocation AliasLocation, 4917 IdentifierInfo *ClassName, SourceLocation ClassLocation); 4918 4919 bool CheckForwardProtocolDeclarationForCircularDependency( 4920 IdentifierInfo *PName, 4921 SourceLocation &PLoc, SourceLocation PrevLoc, 4922 const ObjCList<ObjCProtocolDecl> &PList); 4923 4924 Decl *ActOnStartProtocolInterface( 4925 SourceLocation AtProtoInterfaceLoc, 4926 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 4927 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 4928 const SourceLocation *ProtoLocs, 4929 SourceLocation EndProtoLoc, 4930 AttributeList *AttrList); 4931 4932 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 4933 IdentifierInfo *ClassName, 4934 SourceLocation ClassLoc, 4935 IdentifierInfo *CategoryName, 4936 SourceLocation CategoryLoc, 4937 Decl * const *ProtoRefs, 4938 unsigned NumProtoRefs, 4939 const SourceLocation *ProtoLocs, 4940 SourceLocation EndProtoLoc); 4941 4942 Decl *ActOnStartClassImplementation( 4943 SourceLocation AtClassImplLoc, 4944 IdentifierInfo *ClassName, SourceLocation ClassLoc, 4945 IdentifierInfo *SuperClassname, 4946 SourceLocation SuperClassLoc); 4947 4948 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 4949 IdentifierInfo *ClassName, 4950 SourceLocation ClassLoc, 4951 IdentifierInfo *CatName, 4952 SourceLocation CatLoc); 4953 4954 Decl *ActOnForwardClassDeclaration(SourceLocation Loc, 4955 IdentifierInfo **IdentList, 4956 SourceLocation *IdentLocs, 4957 unsigned NumElts); 4958 4959 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 4960 const IdentifierLocPair *IdentList, 4961 unsigned NumElts, 4962 AttributeList *attrList); 4963 4964 void FindProtocolDeclaration(bool WarnOnDeclarations, 4965 const IdentifierLocPair *ProtocolId, 4966 unsigned NumProtocols, 4967 llvm::SmallVectorImpl<Decl *> &Protocols); 4968 4969 /// Ensure attributes are consistent with type. 4970 /// \param [in, out] Attributes The attributes to check; they will 4971 /// be modified to be consistent with \arg PropertyTy. 4972 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 4973 SourceLocation Loc, 4974 unsigned &Attributes); 4975 4976 /// Process the specified property declaration and create decls for the 4977 /// setters and getters as needed. 4978 /// \param property The property declaration being processed 4979 /// \param DC The semantic container for the property 4980 /// \param redeclaredProperty Declaration for property if redeclared 4981 /// in class extension. 4982 /// \param lexicalDC Container for redeclaredProperty. 4983 void ProcessPropertyDecl(ObjCPropertyDecl *property, 4984 ObjCContainerDecl *DC, 4985 ObjCPropertyDecl *redeclaredProperty = 0, 4986 ObjCContainerDecl *lexicalDC = 0); 4987 4988 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 4989 ObjCPropertyDecl *SuperProperty, 4990 const IdentifierInfo *Name); 4991 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 4992 4993 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 4994 ObjCMethodDecl *MethodDecl, 4995 bool IsInstance); 4996 4997 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 4998 4999 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5000 ObjCInterfaceDecl *ID); 5001 5002 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5003 ObjCProtocolDecl *PDecl); 5004 5005 void ActOnAtEnd(Scope *S, SourceRange AtEnd, Decl *classDecl, 5006 Decl **allMethods = 0, unsigned allNum = 0, 5007 Decl **allProperties = 0, unsigned pNum = 0, 5008 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5009 5010 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5011 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5012 Selector GetterSel, Selector SetterSel, 5013 Decl *ClassCategory, 5014 bool *OverridingProperty, 5015 tok::ObjCKeywordKind MethodImplKind, 5016 DeclContext *lexicalDC = 0); 5017 5018 Decl *ActOnPropertyImplDecl(Scope *S, 5019 SourceLocation AtLoc, 5020 SourceLocation PropertyLoc, 5021 bool ImplKind,Decl *ClassImplDecl, 5022 IdentifierInfo *PropertyId, 5023 IdentifierInfo *PropertyIvar, 5024 SourceLocation PropertyIvarLoc); 5025 5026 enum ObjCSpecialMethodKind { 5027 OSMK_None, 5028 OSMK_Alloc, 5029 OSMK_New, 5030 OSMK_Copy, 5031 OSMK_RetainingInit, 5032 OSMK_NonRetainingInit 5033 }; 5034 5035 struct ObjCArgInfo { 5036 IdentifierInfo *Name; 5037 SourceLocation NameLoc; 5038 // The Type is null if no type was specified, and the DeclSpec is invalid 5039 // in this case. 5040 ParsedType Type; 5041 ObjCDeclSpec DeclSpec; 5042 5043 /// ArgAttrs - Attribute list for this argument. 5044 AttributeList *ArgAttrs; 5045 }; 5046 5047 Decl *ActOnMethodDeclaration( 5048 Scope *S, 5049 SourceLocation BeginLoc, // location of the + or -. 5050 SourceLocation EndLoc, // location of the ; or {. 5051 tok::TokenKind MethodType, 5052 Decl *ClassDecl, ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5053 SourceLocation SelectorStartLoc, Selector Sel, 5054 // optional arguments. The number of types/arguments is obtained 5055 // from the Sel.getNumArgs(). 5056 ObjCArgInfo *ArgInfo, 5057 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5058 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5059 bool isVariadic, bool MethodDefinition); 5060 5061 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5062 // Will search "local" class/category implementations for a method decl. 5063 // Will also search in class's root looking for instance method. 5064 // Returns 0 if no method is found. 5065 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5066 ObjCInterfaceDecl *CDecl); 5067 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5068 ObjCInterfaceDecl *ClassDecl); 5069 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5070 const ObjCObjectPointerType *OPT, 5071 bool IsInstance); 5072 5073 bool inferObjCARCLifetime(ValueDecl *decl); 5074 5075 ExprResult 5076 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5077 Expr *BaseExpr, 5078 DeclarationName MemberName, 5079 SourceLocation MemberLoc, 5080 SourceLocation SuperLoc, QualType SuperType, 5081 bool Super); 5082 5083 ExprResult 5084 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5085 IdentifierInfo &propertyName, 5086 SourceLocation receiverNameLoc, 5087 SourceLocation propertyNameLoc); 5088 5089 ObjCMethodDecl *tryCaptureObjCSelf(); 5090 5091 /// \brief Describes the kind of message expression indicated by a message 5092 /// send that starts with an identifier. 5093 enum ObjCMessageKind { 5094 /// \brief The message is sent to 'super'. 5095 ObjCSuperMessage, 5096 /// \brief The message is an instance message. 5097 ObjCInstanceMessage, 5098 /// \brief The message is a class message, and the identifier is a type 5099 /// name. 5100 ObjCClassMessage 5101 }; 5102 5103 ObjCMessageKind getObjCMessageKind(Scope *S, 5104 IdentifierInfo *Name, 5105 SourceLocation NameLoc, 5106 bool IsSuper, 5107 bool HasTrailingDot, 5108 ParsedType &ReceiverType); 5109 5110 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5111 Selector Sel, 5112 SourceLocation LBracLoc, 5113 SourceLocation SelectorLoc, 5114 SourceLocation RBracLoc, 5115 MultiExprArg Args); 5116 5117 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5118 QualType ReceiverType, 5119 SourceLocation SuperLoc, 5120 Selector Sel, 5121 ObjCMethodDecl *Method, 5122 SourceLocation LBracLoc, 5123 SourceLocation SelectorLoc, 5124 SourceLocation RBracLoc, 5125 MultiExprArg Args); 5126 5127 ExprResult ActOnClassMessage(Scope *S, 5128 ParsedType Receiver, 5129 Selector Sel, 5130 SourceLocation LBracLoc, 5131 SourceLocation SelectorLoc, 5132 SourceLocation RBracLoc, 5133 MultiExprArg Args); 5134 5135 ExprResult BuildInstanceMessage(Expr *Receiver, 5136 QualType ReceiverType, 5137 SourceLocation SuperLoc, 5138 Selector Sel, 5139 ObjCMethodDecl *Method, 5140 SourceLocation LBracLoc, 5141 SourceLocation SelectorLoc, 5142 SourceLocation RBracLoc, 5143 MultiExprArg Args); 5144 5145 ExprResult ActOnInstanceMessage(Scope *S, 5146 Expr *Receiver, 5147 Selector Sel, 5148 SourceLocation LBracLoc, 5149 SourceLocation SelectorLoc, 5150 SourceLocation RBracLoc, 5151 MultiExprArg Args); 5152 5153 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5154 ObjCBridgeCastKind Kind, 5155 SourceLocation BridgeKeywordLoc, 5156 TypeSourceInfo *TSInfo, 5157 Expr *SubExpr); 5158 5159 ExprResult ActOnObjCBridgedCast(Scope *S, 5160 SourceLocation LParenLoc, 5161 ObjCBridgeCastKind Kind, 5162 SourceLocation BridgeKeywordLoc, 5163 ParsedType Type, 5164 SourceLocation RParenLoc, 5165 Expr *SubExpr); 5166 5167 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5168 5169 /// \brief Check whether the given new method is a valid override of the 5170 /// given overridden method, and set any properties that should be inherited. 5171 /// 5172 /// \returns True if an error occurred. 5173 bool CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5174 const ObjCMethodDecl *Overridden, 5175 bool IsImplementation); 5176 5177 /// \brief Check whether the given method overrides any methods in its class, 5178 /// calling \c CheckObjCMethodOverride for each overridden method. 5179 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5180 5181 enum PragmaOptionsAlignKind { 5182 POAK_Native, // #pragma options align=native 5183 POAK_Natural, // #pragma options align=natural 5184 POAK_Packed, // #pragma options align=packed 5185 POAK_Power, // #pragma options align=power 5186 POAK_Mac68k, // #pragma options align=mac68k 5187 POAK_Reset // #pragma options align=reset 5188 }; 5189 5190 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5191 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5192 SourceLocation PragmaLoc, 5193 SourceLocation KindLoc); 5194 5195 enum PragmaPackKind { 5196 PPK_Default, // #pragma pack([n]) 5197 PPK_Show, // #pragma pack(show), only supported by MSVC. 5198 PPK_Push, // #pragma pack(push, [identifier], [n]) 5199 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5200 }; 5201 5202 enum PragmaMSStructKind { 5203 PMSST_OFF, // #pragms ms_struct off 5204 PMSST_ON // #pragms ms_struct on 5205 }; 5206 5207 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5208 void ActOnPragmaPack(PragmaPackKind Kind, 5209 IdentifierInfo *Name, 5210 Expr *Alignment, 5211 SourceLocation PragmaLoc, 5212 SourceLocation LParenLoc, 5213 SourceLocation RParenLoc); 5214 5215 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5216 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5217 5218 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5219 void ActOnPragmaUnused(const Token &Identifier, 5220 Scope *curScope, 5221 SourceLocation PragmaLoc); 5222 5223 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5224 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 5225 SourceLocation PragmaLoc); 5226 5227 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II); 5228 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5229 5230 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5231 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5232 SourceLocation PragmaLoc, 5233 SourceLocation WeakNameLoc); 5234 5235 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5236 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5237 IdentifierInfo* AliasName, 5238 SourceLocation PragmaLoc, 5239 SourceLocation WeakNameLoc, 5240 SourceLocation AliasNameLoc); 5241 5242 /// ActOnPragmaFPContract - Called on well formed 5243 /// #pragma {STDC,OPENCL} FP_CONTRACT 5244 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5245 5246 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5247 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5248 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5249 5250 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5251 void AddMsStructLayoutForRecord(RecordDecl *RD); 5252 5253 /// FreePackedContext - Deallocate and null out PackContext. 5254 void FreePackedContext(); 5255 5256 /// PushNamespaceVisibilityAttr - Note that we've entered a 5257 /// namespace with a visibility attribute. 5258 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 5259 5260 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5261 /// add an appropriate visibility attribute. 5262 void AddPushedVisibilityAttribute(Decl *RD); 5263 5264 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5265 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5266 void PopPragmaVisibility(); 5267 5268 /// FreeVisContext - Deallocate and null out VisContext. 5269 void FreeVisContext(); 5270 5271 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5272 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, Expr *E); 5273 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, TypeSourceInfo *T); 5274 5275 /// CastCategory - Get the correct forwarded implicit cast result category 5276 /// from the inner expression. 5277 ExprValueKind CastCategory(Expr *E); 5278 5279 /// \brief The kind of conversion being performed. 5280 enum CheckedConversionKind { 5281 /// \brief An implicit conversion. 5282 CCK_ImplicitConversion, 5283 /// \brief A C-style cast. 5284 CCK_CStyleCast, 5285 /// \brief A functional-style cast. 5286 CCK_FunctionalCast, 5287 /// \brief A cast other than a C-style cast. 5288 CCK_OtherCast 5289 }; 5290 5291 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5292 /// cast. If there is already an implicit cast, merge into the existing one. 5293 /// If isLvalue, the result of the cast is an lvalue. 5294 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5295 ExprValueKind VK = VK_RValue, 5296 const CXXCastPath *BasePath = 0, 5297 CheckedConversionKind CCK 5298 = CCK_ImplicitConversion); 5299 5300 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5301 /// to the conversion from scalar type ScalarTy to the Boolean type. 5302 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5303 5304 /// IgnoredValueConversions - Given that an expression's result is 5305 /// syntactically ignored, perform any conversions that are 5306 /// required. 5307 ExprResult IgnoredValueConversions(Expr *E); 5308 5309 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5310 // functions and arrays to their respective pointers (C99 6.3.2.1). 5311 ExprResult UsualUnaryConversions(Expr *E); 5312 5313 // DefaultFunctionArrayConversion - converts functions and arrays 5314 // to their respective pointers (C99 6.3.2.1). 5315 ExprResult DefaultFunctionArrayConversion(Expr *E); 5316 5317 // DefaultFunctionArrayLvalueConversion - converts functions and 5318 // arrays to their respective pointers and performs the 5319 // lvalue-to-rvalue conversion. 5320 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5321 5322 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5323 // the operand. This is DefaultFunctionArrayLvalueConversion, 5324 // except that it assumes the operand isn't of function or array 5325 // type. 5326 ExprResult DefaultLvalueConversion(Expr *E); 5327 5328 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5329 // do not have a prototype. Integer promotions are performed on each 5330 // argument, and arguments that have type float are promoted to double. 5331 ExprResult DefaultArgumentPromotion(Expr *E); 5332 5333 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5334 enum VariadicCallType { 5335 VariadicFunction, 5336 VariadicBlock, 5337 VariadicMethod, 5338 VariadicConstructor, 5339 VariadicDoesNotApply 5340 }; 5341 5342 /// GatherArgumentsForCall - Collector argument expressions for various 5343 /// form of call prototypes. 5344 bool GatherArgumentsForCall(SourceLocation CallLoc, 5345 FunctionDecl *FDecl, 5346 const FunctionProtoType *Proto, 5347 unsigned FirstProtoArg, 5348 Expr **Args, unsigned NumArgs, 5349 llvm::SmallVector<Expr *, 8> &AllArgs, 5350 VariadicCallType CallType = VariadicDoesNotApply); 5351 5352 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5353 // will warn if the resulting type is not a POD type. 5354 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5355 FunctionDecl *FDecl); 5356 5357 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5358 // operands and then handles various conversions that are common to binary 5359 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5360 // routine returns the first non-arithmetic type found. The client is 5361 // responsible for emitting appropriate error diagnostics. 5362 QualType UsualArithmeticConversions(ExprResult &lExpr, ExprResult &rExpr, 5363 bool isCompAssign = false); 5364 5365 /// AssignConvertType - All of the 'assignment' semantic checks return this 5366 /// enum to indicate whether the assignment was allowed. These checks are 5367 /// done for simple assignments, as well as initialization, return from 5368 /// function, argument passing, etc. The query is phrased in terms of a 5369 /// source and destination type. 5370 enum AssignConvertType { 5371 /// Compatible - the types are compatible according to the standard. 5372 Compatible, 5373 5374 /// PointerToInt - The assignment converts a pointer to an int, which we 5375 /// accept as an extension. 5376 PointerToInt, 5377 5378 /// IntToPointer - The assignment converts an int to a pointer, which we 5379 /// accept as an extension. 5380 IntToPointer, 5381 5382 /// FunctionVoidPointer - The assignment is between a function pointer and 5383 /// void*, which the standard doesn't allow, but we accept as an extension. 5384 FunctionVoidPointer, 5385 5386 /// IncompatiblePointer - The assignment is between two pointers types that 5387 /// are not compatible, but we accept them as an extension. 5388 IncompatiblePointer, 5389 5390 /// IncompatiblePointer - The assignment is between two pointers types which 5391 /// point to integers which have a different sign, but are otherwise identical. 5392 /// This is a subset of the above, but broken out because it's by far the most 5393 /// common case of incompatible pointers. 5394 IncompatiblePointerSign, 5395 5396 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5397 /// c/v/r qualifiers, which we accept as an extension. 5398 CompatiblePointerDiscardsQualifiers, 5399 5400 /// IncompatiblePointerDiscardsQualifiers - The assignment 5401 /// discards qualifiers that we don't permit to be discarded, 5402 /// like address spaces. 5403 IncompatiblePointerDiscardsQualifiers, 5404 5405 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5406 /// nested pointer types, and the qualifiers other than the first two 5407 /// levels differ e.g. char ** -> const char **, but we accept them as an 5408 /// extension. 5409 IncompatibleNestedPointerQualifiers, 5410 5411 /// IncompatibleVectors - The assignment is between two vector types that 5412 /// have the same size, which we accept as an extension. 5413 IncompatibleVectors, 5414 5415 /// IntToBlockPointer - The assignment converts an int to a block 5416 /// pointer. We disallow this. 5417 IntToBlockPointer, 5418 5419 /// IncompatibleBlockPointer - The assignment is between two block 5420 /// pointers types that are not compatible. 5421 IncompatibleBlockPointer, 5422 5423 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5424 /// id type and something else (that is incompatible with it). For example, 5425 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5426 IncompatibleObjCQualifiedId, 5427 5428 /// Incompatible - We reject this conversion outright, it is invalid to 5429 /// represent it in the AST. 5430 Incompatible 5431 }; 5432 5433 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5434 /// assignment conversion type specified by ConvTy. This returns true if the 5435 /// conversion was invalid or false if the conversion was accepted. 5436 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5437 SourceLocation Loc, 5438 QualType DstType, QualType SrcType, 5439 Expr *SrcExpr, AssignmentAction Action, 5440 bool *Complained = 0); 5441 5442 /// CheckAssignmentConstraints - Perform type checking for assignment, 5443 /// argument passing, variable initialization, and function return values. 5444 /// C99 6.5.16. 5445 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5446 QualType lhs, QualType rhs); 5447 5448 /// Check assignment constraints and prepare for a conversion of the 5449 /// RHS to the LHS type. 5450 AssignConvertType CheckAssignmentConstraints(QualType lhs, ExprResult &rhs, 5451 CastKind &Kind); 5452 5453 // CheckSingleAssignmentConstraints - Currently used by 5454 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5455 // this routine performs the default function/array converions. 5456 AssignConvertType CheckSingleAssignmentConstraints(QualType lhs, 5457 ExprResult &rExprRes); 5458 5459 // \brief If the lhs type is a transparent union, check whether we 5460 // can initialize the transparent union with the given expression. 5461 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType lhs, 5462 ExprResult &rExpr); 5463 5464 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5465 5466 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5467 5468 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5469 AssignmentAction Action, 5470 bool AllowExplicit = false); 5471 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5472 AssignmentAction Action, 5473 bool AllowExplicit, 5474 ImplicitConversionSequence& ICS); 5475 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5476 const ImplicitConversionSequence& ICS, 5477 AssignmentAction Action, 5478 CheckedConversionKind CCK 5479 = CCK_ImplicitConversion); 5480 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5481 const StandardConversionSequence& SCS, 5482 AssignmentAction Action, 5483 CheckedConversionKind CCK); 5484 5485 /// the following "Check" methods will return a valid/converted QualType 5486 /// or a null QualType (indicating an error diagnostic was issued). 5487 5488 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5489 QualType InvalidOperands(SourceLocation l, ExprResult &lex, ExprResult &rex); 5490 QualType CheckPointerToMemberOperands( // C++ 5.5 5491 ExprResult &lex, ExprResult &rex, ExprValueKind &VK, 5492 SourceLocation OpLoc, bool isIndirect); 5493 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5494 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign, 5495 bool isDivide); 5496 QualType CheckRemainderOperands( // C99 6.5.5 5497 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 5498 QualType CheckAdditionOperands( // C99 6.5.6 5499 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 5500 QualType CheckSubtractionOperands( // C99 6.5.6 5501 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 5502 QualType CheckShiftOperands( // C99 6.5.7 5503 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 5504 bool isCompAssign = false); 5505 QualType CheckCompareOperands( // C99 6.5.8/9 5506 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 5507 bool isRelational); 5508 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 5509 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 5510 QualType CheckLogicalOperands( // C99 6.5.[13,14] 5511 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc); 5512 // CheckAssignmentOperands is used for both simple and compound assignment. 5513 // For simple assignment, pass both expressions and a null converted type. 5514 // For compound assignment, pass both expressions and the converted type. 5515 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 5516 Expr *lex, ExprResult &rex, SourceLocation OpLoc, QualType convertedType); 5517 5518 void ConvertPropertyForLValue(ExprResult &LHS, ExprResult &RHS, QualType& LHSTy); 5519 ExprResult ConvertPropertyForRValue(Expr *E); 5520 5521 QualType CheckConditionalOperands( // C99 6.5.15 5522 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5523 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5524 QualType CXXCheckConditionalOperands( // C++ 5.16 5525 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5526 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5527 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 5528 bool *NonStandardCompositeType = 0); 5529 QualType FindCompositePointerType(SourceLocation Loc, ExprResult &E1, ExprResult &E2, 5530 bool *NonStandardCompositeType = 0) { 5531 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 5532 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, NonStandardCompositeType); 5533 E1 = Owned(E1Tmp); 5534 E2 = Owned(E2Tmp); 5535 return Composite; 5536 } 5537 5538 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5539 SourceLocation questionLoc); 5540 5541 bool DiagnoseConditionalForNull(Expr *LHS, Expr *RHS, 5542 SourceLocation QuestionLoc); 5543 5544 /// type checking for vector binary operators. 5545 QualType CheckVectorOperands(SourceLocation l, ExprResult &lex, ExprResult &rex); 5546 QualType CheckVectorCompareOperands(ExprResult &lex, ExprResult &rx, 5547 SourceLocation l, bool isRel); 5548 5549 /// type checking declaration initializers (C99 6.7.8) 5550 bool CheckInitList(const InitializedEntity &Entity, 5551 InitListExpr *&InitList, QualType &DeclType); 5552 bool CheckForConstantInitializer(Expr *e, QualType t); 5553 5554 // type checking C++ declaration initializers (C++ [dcl.init]). 5555 5556 /// ReferenceCompareResult - Expresses the result of comparing two 5557 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5558 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5559 enum ReferenceCompareResult { 5560 /// Ref_Incompatible - The two types are incompatible, so direct 5561 /// reference binding is not possible. 5562 Ref_Incompatible = 0, 5563 /// Ref_Related - The two types are reference-related, which means 5564 /// that their unqualified forms (T1 and T2) are either the same 5565 /// or T1 is a base class of T2. 5566 Ref_Related, 5567 /// Ref_Compatible_With_Added_Qualification - The two types are 5568 /// reference-compatible with added qualification, meaning that 5569 /// they are reference-compatible and the qualifiers on T1 (cv1) 5570 /// are greater than the qualifiers on T2 (cv2). 5571 Ref_Compatible_With_Added_Qualification, 5572 /// Ref_Compatible - The two types are reference-compatible and 5573 /// have equivalent qualifiers (cv1 == cv2). 5574 Ref_Compatible 5575 }; 5576 5577 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 5578 QualType T1, QualType T2, 5579 bool &DerivedToBase, 5580 bool &ObjCConversion, 5581 bool &ObjCLifetimeConversion); 5582 5583 /// CheckCastTypes - Check type constraints for casting between types under 5584 /// C semantics, or forward to CXXCheckCStyleCast in C++. 5585 ExprResult CheckCastTypes(SourceLocation CastStartLoc, SourceRange TyRange, 5586 QualType CastTy, Expr *CastExpr, CastKind &Kind, 5587 ExprValueKind &VK, CXXCastPath &BasePath, 5588 bool FunctionalStyle = false); 5589 5590 ExprResult checkUnknownAnyCast(SourceRange TyRange, QualType castType, 5591 Expr *castExpr, CastKind &castKind, 5592 ExprValueKind &valueKind, CXXCastPath &BasePath); 5593 5594 // CheckVectorCast - check type constraints for vectors. 5595 // Since vectors are an extension, there are no C standard reference for this. 5596 // We allow casting between vectors and integer datatypes of the same size. 5597 // returns true if the cast is invalid 5598 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 5599 CastKind &Kind); 5600 5601 // CheckExtVectorCast - check type constraints for extended vectors. 5602 // Since vectors are an extension, there are no C standard reference for this. 5603 // We allow casting between vectors and integer datatypes of the same size, 5604 // or vectors and the element type of that vector. 5605 // returns the cast expr 5606 ExprResult CheckExtVectorCast(SourceRange R, QualType VectorTy, Expr *CastExpr, 5607 CastKind &Kind); 5608 5609 /// CXXCheckCStyleCast - Check constraints of a C-style or function-style 5610 /// cast under C++ semantics. 5611 ExprResult CXXCheckCStyleCast(SourceRange R, QualType CastTy, ExprValueKind &VK, 5612 Expr *CastExpr, CastKind &Kind, 5613 CXXCastPath &BasePath, bool FunctionalStyle); 5614 5615 /// \brief Checks for invalid conversions and casts between 5616 /// retainable pointers and other pointer kinds. 5617 void CheckObjCARCConversion(SourceRange castRange, QualType castType, 5618 Expr *op, CheckedConversionKind CCK); 5619 5620 /// checkRetainCycles - Check whether an Objective-C message send 5621 /// might create an obvious retain cycle. 5622 void checkRetainCycles(ObjCMessageExpr *msg); 5623 void checkRetainCycles(Expr *receiver, Expr *argument); 5624 5625 /// checkWeakUnsafeAssigns - Check whether +1 expr is being assigned 5626 /// to weak/__unsafe_unretained. 5627 void checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 5628 5629 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 5630 /// \param Method - May be null. 5631 /// \param [out] ReturnType - The return type of the send. 5632 /// \return true iff there were any incompatible types. 5633 bool CheckMessageArgumentTypes(QualType ReceiverType, 5634 Expr **Args, unsigned NumArgs, Selector Sel, 5635 ObjCMethodDecl *Method, bool isClassMessage, 5636 bool isSuperMessage, 5637 SourceLocation lbrac, SourceLocation rbrac, 5638 QualType &ReturnType, ExprValueKind &VK); 5639 5640 /// \brief Determine the result of a message send expression based on 5641 /// the type of the receiver, the method expected to receive the message, 5642 /// and the form of the message send. 5643 QualType getMessageSendResultType(QualType ReceiverType, 5644 ObjCMethodDecl *Method, 5645 bool isClassMessage, bool isSuperMessage); 5646 5647 /// \brief If the given expression involves a message send to a method 5648 /// with a related result type, emit a note describing what happened. 5649 void EmitRelatedResultTypeNote(const Expr *E); 5650 5651 /// CheckBooleanCondition - Diagnose problems involving the use of 5652 /// the given expression as a boolean condition (e.g. in an if 5653 /// statement). Also performs the standard function and array 5654 /// decays, possibly changing the input variable. 5655 /// 5656 /// \param Loc - A location associated with the condition, e.g. the 5657 /// 'if' keyword. 5658 /// \return true iff there were any errors 5659 ExprResult CheckBooleanCondition(Expr *CondExpr, SourceLocation Loc); 5660 5661 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 5662 Expr *SubExpr); 5663 5664 /// DiagnoseAssignmentAsCondition - Given that an expression is 5665 /// being used as a boolean condition, warn if it's an assignment. 5666 void DiagnoseAssignmentAsCondition(Expr *E); 5667 5668 /// \brief Redundant parentheses over an equality comparison can indicate 5669 /// that the user intended an assignment used as condition. 5670 void DiagnoseEqualityWithExtraParens(ParenExpr *parenE); 5671 5672 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 5673 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 5674 5675 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 5676 /// the specified width and sign. If an overflow occurs, detect it and emit 5677 /// the specified diagnostic. 5678 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 5679 unsigned NewWidth, bool NewSign, 5680 SourceLocation Loc, unsigned DiagID); 5681 5682 /// Checks that the Objective-C declaration is declared in the global scope. 5683 /// Emits an error and marks the declaration as invalid if it's not declared 5684 /// in the global scope. 5685 bool CheckObjCDeclScope(Decl *D); 5686 5687 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 5688 /// and reports the appropriate diagnostics. Returns false on success. 5689 /// Can optionally return the value of the expression. 5690 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 5691 5692 /// VerifyBitField - verifies that a bit field expression is an ICE and has 5693 /// the correct width, and that the field type is valid. 5694 /// Returns false on success. 5695 /// Can optionally return whether the bit-field is of width 0 5696 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 5697 QualType FieldTy, const Expr *BitWidth, 5698 bool *ZeroWidth = 0); 5699 5700 /// \name Code completion 5701 //@{ 5702 /// \brief Describes the context in which code completion occurs. 5703 enum ParserCompletionContext { 5704 /// \brief Code completion occurs at top-level or namespace context. 5705 PCC_Namespace, 5706 /// \brief Code completion occurs within a class, struct, or union. 5707 PCC_Class, 5708 /// \brief Code completion occurs within an Objective-C interface, protocol, 5709 /// or category. 5710 PCC_ObjCInterface, 5711 /// \brief Code completion occurs within an Objective-C implementation or 5712 /// category implementation 5713 PCC_ObjCImplementation, 5714 /// \brief Code completion occurs within the list of instance variables 5715 /// in an Objective-C interface, protocol, category, or implementation. 5716 PCC_ObjCInstanceVariableList, 5717 /// \brief Code completion occurs following one or more template 5718 /// headers. 5719 PCC_Template, 5720 /// \brief Code completion occurs following one or more template 5721 /// headers within a class. 5722 PCC_MemberTemplate, 5723 /// \brief Code completion occurs within an expression. 5724 PCC_Expression, 5725 /// \brief Code completion occurs within a statement, which may 5726 /// also be an expression or a declaration. 5727 PCC_Statement, 5728 /// \brief Code completion occurs at the beginning of the 5729 /// initialization statement (or expression) in a for loop. 5730 PCC_ForInit, 5731 /// \brief Code completion occurs within the condition of an if, 5732 /// while, switch, or for statement. 5733 PCC_Condition, 5734 /// \brief Code completion occurs within the body of a function on a 5735 /// recovery path, where we do not have a specific handle on our position 5736 /// in the grammar. 5737 PCC_RecoveryInFunction, 5738 /// \brief Code completion occurs where only a type is permitted. 5739 PCC_Type, 5740 /// \brief Code completion occurs in a parenthesized expression, which 5741 /// might also be a type cast. 5742 PCC_ParenthesizedExpression, 5743 /// \brief Code completion occurs within a sequence of declaration 5744 /// specifiers within a function, method, or block. 5745 PCC_LocalDeclarationSpecifiers 5746 }; 5747 5748 void CodeCompleteOrdinaryName(Scope *S, 5749 ParserCompletionContext CompletionContext); 5750 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 5751 bool AllowNonIdentifiers, 5752 bool AllowNestedNameSpecifiers); 5753 5754 struct CodeCompleteExpressionData; 5755 void CodeCompleteExpression(Scope *S, 5756 const CodeCompleteExpressionData &Data); 5757 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 5758 SourceLocation OpLoc, 5759 bool IsArrow); 5760 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 5761 void CodeCompleteTag(Scope *S, unsigned TagSpec); 5762 void CodeCompleteTypeQualifiers(DeclSpec &DS); 5763 void CodeCompleteCase(Scope *S); 5764 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 5765 void CodeCompleteInitializer(Scope *S, Decl *D); 5766 void CodeCompleteReturn(Scope *S); 5767 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 5768 5769 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 5770 bool EnteringContext); 5771 void CodeCompleteUsing(Scope *S); 5772 void CodeCompleteUsingDirective(Scope *S); 5773 void CodeCompleteNamespaceDecl(Scope *S); 5774 void CodeCompleteNamespaceAliasDecl(Scope *S); 5775 void CodeCompleteOperatorName(Scope *S); 5776 void CodeCompleteConstructorInitializer(Decl *Constructor, 5777 CXXCtorInitializer** Initializers, 5778 unsigned NumInitializers); 5779 5780 void CodeCompleteObjCAtDirective(Scope *S, Decl *ObjCImpDecl, 5781 bool InInterface); 5782 void CodeCompleteObjCAtVisibility(Scope *S); 5783 void CodeCompleteObjCAtStatement(Scope *S); 5784 void CodeCompleteObjCAtExpression(Scope *S); 5785 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 5786 void CodeCompleteObjCPropertyGetter(Scope *S, Decl *ClassDecl); 5787 void CodeCompleteObjCPropertySetter(Scope *S, Decl *ClassDecl); 5788 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 5789 bool IsParameter); 5790 void CodeCompleteObjCMessageReceiver(Scope *S); 5791 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 5792 IdentifierInfo **SelIdents, 5793 unsigned NumSelIdents, 5794 bool AtArgumentExpression); 5795 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 5796 IdentifierInfo **SelIdents, 5797 unsigned NumSelIdents, 5798 bool AtArgumentExpression, 5799 bool IsSuper = false); 5800 void CodeCompleteObjCInstanceMessage(Scope *S, ExprTy *Receiver, 5801 IdentifierInfo **SelIdents, 5802 unsigned NumSelIdents, 5803 bool AtArgumentExpression, 5804 ObjCInterfaceDecl *Super = 0); 5805 void CodeCompleteObjCForCollection(Scope *S, 5806 DeclGroupPtrTy IterationVar); 5807 void CodeCompleteObjCSelector(Scope *S, 5808 IdentifierInfo **SelIdents, 5809 unsigned NumSelIdents); 5810 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 5811 unsigned NumProtocols); 5812 void CodeCompleteObjCProtocolDecl(Scope *S); 5813 void CodeCompleteObjCInterfaceDecl(Scope *S); 5814 void CodeCompleteObjCSuperclass(Scope *S, 5815 IdentifierInfo *ClassName, 5816 SourceLocation ClassNameLoc); 5817 void CodeCompleteObjCImplementationDecl(Scope *S); 5818 void CodeCompleteObjCInterfaceCategory(Scope *S, 5819 IdentifierInfo *ClassName, 5820 SourceLocation ClassNameLoc); 5821 void CodeCompleteObjCImplementationCategory(Scope *S, 5822 IdentifierInfo *ClassName, 5823 SourceLocation ClassNameLoc); 5824 void CodeCompleteObjCPropertyDefinition(Scope *S, Decl *ObjCImpDecl); 5825 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 5826 IdentifierInfo *PropertyName, 5827 Decl *ObjCImpDecl); 5828 void CodeCompleteObjCMethodDecl(Scope *S, 5829 bool IsInstanceMethod, 5830 ParsedType ReturnType, 5831 Decl *IDecl); 5832 void CodeCompleteObjCMethodDeclSelector(Scope *S, 5833 bool IsInstanceMethod, 5834 bool AtParameterName, 5835 ParsedType ReturnType, 5836 IdentifierInfo **SelIdents, 5837 unsigned NumSelIdents); 5838 void CodeCompletePreprocessorDirective(bool InConditional); 5839 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 5840 void CodeCompletePreprocessorMacroName(bool IsDefinition); 5841 void CodeCompletePreprocessorExpression(); 5842 void CodeCompletePreprocessorMacroArgument(Scope *S, 5843 IdentifierInfo *Macro, 5844 MacroInfo *MacroInfo, 5845 unsigned Argument); 5846 void CodeCompleteNaturalLanguage(); 5847 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 5848 llvm::SmallVectorImpl<CodeCompletionResult> &Results); 5849 //@} 5850 5851 void PrintStats() const {} 5852 5853 //===--------------------------------------------------------------------===// 5854 // Extra semantic analysis beyond the C type system 5855 5856public: 5857 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 5858 unsigned ByteNo) const; 5859 5860private: 5861 void CheckArrayAccess(const Expr *E); 5862 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 5863 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 5864 5865 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 5866 bool CheckObjCString(Expr *Arg); 5867 5868 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5869 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5870 5871 bool SemaBuiltinVAStart(CallExpr *TheCall); 5872 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 5873 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 5874 5875public: 5876 // Used by C++ template instantiation. 5877 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 5878 5879private: 5880 bool SemaBuiltinPrefetch(CallExpr *TheCall); 5881 bool SemaBuiltinObjectSize(CallExpr *TheCall); 5882 bool SemaBuiltinLongjmp(CallExpr *TheCall); 5883 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 5884 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 5885 llvm::APSInt &Result); 5886 5887 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 5888 bool HasVAListArg, unsigned format_idx, 5889 unsigned firstDataArg, bool isPrintf); 5890 5891 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 5892 const CallExpr *TheCall, bool HasVAListArg, 5893 unsigned format_idx, unsigned firstDataArg, 5894 bool isPrintf); 5895 5896 void CheckNonNullArguments(const NonNullAttr *NonNull, 5897 const Expr * const *ExprArgs, 5898 SourceLocation CallSiteLoc); 5899 5900 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 5901 unsigned format_idx, unsigned firstDataArg, 5902 bool isPrintf); 5903 5904 void CheckMemsetcpymoveArguments(const CallExpr *Call, 5905 const IdentifierInfo *FnName); 5906 5907 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 5908 SourceLocation ReturnLoc); 5909 void CheckFloatComparison(SourceLocation loc, Expr* lex, Expr* rex); 5910 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 5911 5912 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 5913 Expr *Init); 5914 5915 /// \brief The parser's current scope. 5916 /// 5917 /// The parser maintains this state here. 5918 Scope *CurScope; 5919 5920protected: 5921 friend class Parser; 5922 friend class InitializationSequence; 5923 5924public: 5925 /// \brief Retrieve the parser's current scope. 5926 /// 5927 /// This routine must only be used when it is certain that semantic analysis 5928 /// and the parser are in precisely the same context, which is not the case 5929 /// when, e.g., we are performing any kind of template instantiation. 5930 /// Therefore, the only safe places to use this scope are in the parser 5931 /// itself and in routines directly invoked from the parser and *never* from 5932 /// template substitution or instantiation. 5933 Scope *getCurScope() const { return CurScope; } 5934}; 5935 5936/// \brief RAII object that enters a new expression evaluation context. 5937class EnterExpressionEvaluationContext { 5938 Sema &Actions; 5939 5940public: 5941 EnterExpressionEvaluationContext(Sema &Actions, 5942 Sema::ExpressionEvaluationContext NewContext) 5943 : Actions(Actions) { 5944 Actions.PushExpressionEvaluationContext(NewContext); 5945 } 5946 5947 ~EnterExpressionEvaluationContext() { 5948 Actions.PopExpressionEvaluationContext(); 5949 } 5950}; 5951 5952} // end namespace clang 5953 5954#endif 5955