Sema.h revision 921c14322977253a60dcb171f45e468c95fe41f8
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 /// \brief Checks availability of the function depending on the current 1319 /// function context.Inside an unavailable function,unavailability is ignored. 1320 /// 1321 /// \returns true if \arg FD is unavailable and current context is inside 1322 /// an available function, false otherwise. 1323 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1324 1325 ImplicitConversionSequence 1326 TryImplicitConversion(Expr *From, QualType ToType, 1327 bool SuppressUserConversions, 1328 bool AllowExplicit, 1329 bool InOverloadResolution, 1330 bool CStyle, 1331 bool AllowObjCWritebackConversion); 1332 1333 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1334 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1335 bool IsComplexPromotion(QualType FromType, QualType ToType); 1336 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1337 bool InOverloadResolution, 1338 QualType& ConvertedType, bool &IncompatibleObjC); 1339 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1340 QualType& ConvertedType, bool &IncompatibleObjC); 1341 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1342 QualType &ConvertedType); 1343 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1344 QualType& ConvertedType); 1345 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1346 const FunctionProtoType *NewType); 1347 1348 bool CheckPointerConversion(Expr *From, QualType ToType, 1349 CastKind &Kind, 1350 CXXCastPath& BasePath, 1351 bool IgnoreBaseAccess); 1352 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1353 bool InOverloadResolution, 1354 QualType &ConvertedType); 1355 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1356 CastKind &Kind, 1357 CXXCastPath &BasePath, 1358 bool IgnoreBaseAccess); 1359 bool IsQualificationConversion(QualType FromType, QualType ToType, 1360 bool CStyle, bool &ObjCLifetimeConversion); 1361 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1362 QualType &ResultTy); 1363 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1364 1365 1366 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1367 const VarDecl *NRVOCandidate, 1368 QualType ResultType, 1369 Expr *Value); 1370 1371 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1372 ExprResult Init); 1373 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1374 SourceLocation EqualLoc, 1375 ExprResult Init); 1376 ExprResult PerformObjectArgumentInitialization(Expr *From, 1377 NestedNameSpecifier *Qualifier, 1378 NamedDecl *FoundDecl, 1379 CXXMethodDecl *Method); 1380 1381 ExprResult PerformContextuallyConvertToBool(Expr *From); 1382 ExprResult PerformContextuallyConvertToObjCId(Expr *From); 1383 1384 ExprResult 1385 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1386 const PartialDiagnostic &NotIntDiag, 1387 const PartialDiagnostic &IncompleteDiag, 1388 const PartialDiagnostic &ExplicitConvDiag, 1389 const PartialDiagnostic &ExplicitConvNote, 1390 const PartialDiagnostic &AmbigDiag, 1391 const PartialDiagnostic &AmbigNote, 1392 const PartialDiagnostic &ConvDiag); 1393 1394 ExprResult PerformObjectMemberConversion(Expr *From, 1395 NestedNameSpecifier *Qualifier, 1396 NamedDecl *FoundDecl, 1397 NamedDecl *Member); 1398 1399 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1400 // TODO: make this is a typesafe union. 1401 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1402 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1403 1404 void AddOverloadCandidate(NamedDecl *Function, 1405 DeclAccessPair FoundDecl, 1406 Expr **Args, unsigned NumArgs, 1407 OverloadCandidateSet &CandidateSet); 1408 1409 void AddOverloadCandidate(FunctionDecl *Function, 1410 DeclAccessPair FoundDecl, 1411 Expr **Args, unsigned NumArgs, 1412 OverloadCandidateSet& CandidateSet, 1413 bool SuppressUserConversions = false, 1414 bool PartialOverloading = false); 1415 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1416 Expr **Args, unsigned NumArgs, 1417 OverloadCandidateSet& CandidateSet, 1418 bool SuppressUserConversions = false); 1419 void AddMethodCandidate(DeclAccessPair FoundDecl, 1420 QualType ObjectType, 1421 Expr::Classification ObjectClassification, 1422 Expr **Args, unsigned NumArgs, 1423 OverloadCandidateSet& CandidateSet, 1424 bool SuppressUserConversion = false); 1425 void AddMethodCandidate(CXXMethodDecl *Method, 1426 DeclAccessPair FoundDecl, 1427 CXXRecordDecl *ActingContext, QualType ObjectType, 1428 Expr::Classification ObjectClassification, 1429 Expr **Args, unsigned NumArgs, 1430 OverloadCandidateSet& CandidateSet, 1431 bool SuppressUserConversions = false); 1432 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1433 DeclAccessPair FoundDecl, 1434 CXXRecordDecl *ActingContext, 1435 TemplateArgumentListInfo *ExplicitTemplateArgs, 1436 QualType ObjectType, 1437 Expr::Classification ObjectClassification, 1438 Expr **Args, unsigned NumArgs, 1439 OverloadCandidateSet& CandidateSet, 1440 bool SuppressUserConversions = false); 1441 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1442 DeclAccessPair FoundDecl, 1443 TemplateArgumentListInfo *ExplicitTemplateArgs, 1444 Expr **Args, unsigned NumArgs, 1445 OverloadCandidateSet& CandidateSet, 1446 bool SuppressUserConversions = false); 1447 void AddConversionCandidate(CXXConversionDecl *Conversion, 1448 DeclAccessPair FoundDecl, 1449 CXXRecordDecl *ActingContext, 1450 Expr *From, QualType ToType, 1451 OverloadCandidateSet& CandidateSet); 1452 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1453 DeclAccessPair FoundDecl, 1454 CXXRecordDecl *ActingContext, 1455 Expr *From, QualType ToType, 1456 OverloadCandidateSet &CandidateSet); 1457 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1458 DeclAccessPair FoundDecl, 1459 CXXRecordDecl *ActingContext, 1460 const FunctionProtoType *Proto, 1461 Expr *Object, Expr **Args, unsigned NumArgs, 1462 OverloadCandidateSet& CandidateSet); 1463 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1464 SourceLocation OpLoc, 1465 Expr **Args, unsigned NumArgs, 1466 OverloadCandidateSet& CandidateSet, 1467 SourceRange OpRange = SourceRange()); 1468 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1469 Expr **Args, unsigned NumArgs, 1470 OverloadCandidateSet& CandidateSet, 1471 bool IsAssignmentOperator = false, 1472 unsigned NumContextualBoolArguments = 0); 1473 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1474 SourceLocation OpLoc, 1475 Expr **Args, unsigned NumArgs, 1476 OverloadCandidateSet& CandidateSet); 1477 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1478 bool Operator, 1479 Expr **Args, unsigned NumArgs, 1480 TemplateArgumentListInfo *ExplicitTemplateArgs, 1481 OverloadCandidateSet& CandidateSet, 1482 bool PartialOverloading = false, 1483 bool StdNamespaceIsAssociated = false); 1484 1485 // Emit as a 'note' the specific overload candidate 1486 void NoteOverloadCandidate(FunctionDecl *Fn); 1487 1488 // Emit as a series of 'note's all template and non-templates 1489 // identified by the expression Expr 1490 void NoteAllOverloadCandidates(Expr* E); 1491 1492 // [PossiblyAFunctionType] --> [Return] 1493 // NonFunctionType --> NonFunctionType 1494 // R (A) --> R(A) 1495 // R (*)(A) --> R (A) 1496 // R (&)(A) --> R (A) 1497 // R (S::*)(A) --> R (A) 1498 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1499 1500 FunctionDecl *ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, QualType TargetType, 1501 bool Complain, 1502 DeclAccessPair &Found); 1503 1504 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1505 bool Complain = false, 1506 DeclAccessPair* Found = 0); 1507 1508 ExprResult ResolveAndFixSingleFunctionTemplateSpecialization( 1509 Expr *SrcExpr, bool DoFunctionPointerConverion = false, 1510 bool Complain = false, 1511 const SourceRange& OpRangeForComplaining = SourceRange(), 1512 QualType DestTypeForComplaining = QualType(), 1513 unsigned DiagIDForComplaining = 0); 1514 1515 1516 Expr *FixOverloadedFunctionReference(Expr *E, 1517 DeclAccessPair FoundDecl, 1518 FunctionDecl *Fn); 1519 ExprResult FixOverloadedFunctionReference(ExprResult, 1520 DeclAccessPair FoundDecl, 1521 FunctionDecl *Fn); 1522 1523 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1524 Expr **Args, unsigned NumArgs, 1525 OverloadCandidateSet &CandidateSet, 1526 bool PartialOverloading = false); 1527 1528 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1529 UnresolvedLookupExpr *ULE, 1530 SourceLocation LParenLoc, 1531 Expr **Args, unsigned NumArgs, 1532 SourceLocation RParenLoc, 1533 Expr *ExecConfig); 1534 1535 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1536 unsigned Opc, 1537 const UnresolvedSetImpl &Fns, 1538 Expr *input); 1539 1540 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1541 unsigned Opc, 1542 const UnresolvedSetImpl &Fns, 1543 Expr *LHS, Expr *RHS); 1544 1545 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1546 SourceLocation RLoc, 1547 Expr *Base,Expr *Idx); 1548 1549 ExprResult 1550 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1551 SourceLocation LParenLoc, Expr **Args, 1552 unsigned NumArgs, SourceLocation RParenLoc); 1553 ExprResult 1554 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1555 Expr **Args, unsigned NumArgs, 1556 SourceLocation RParenLoc); 1557 1558 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1559 SourceLocation OpLoc); 1560 1561 /// CheckCallReturnType - Checks that a call expression's return type is 1562 /// complete. Returns true on failure. The location passed in is the location 1563 /// that best represents the call. 1564 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1565 CallExpr *CE, FunctionDecl *FD); 1566 1567 /// Helpers for dealing with blocks and functions. 1568 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1569 bool CheckParameterNames); 1570 void CheckCXXDefaultArguments(FunctionDecl *FD); 1571 void CheckExtraCXXDefaultArguments(Declarator &D); 1572 Scope *getNonFieldDeclScope(Scope *S); 1573 1574 /// \name Name lookup 1575 /// 1576 /// These routines provide name lookup that is used during semantic 1577 /// analysis to resolve the various kinds of names (identifiers, 1578 /// overloaded operator names, constructor names, etc.) into zero or 1579 /// more declarations within a particular scope. The major entry 1580 /// points are LookupName, which performs unqualified name lookup, 1581 /// and LookupQualifiedName, which performs qualified name lookup. 1582 /// 1583 /// All name lookup is performed based on some specific criteria, 1584 /// which specify what names will be visible to name lookup and how 1585 /// far name lookup should work. These criteria are important both 1586 /// for capturing language semantics (certain lookups will ignore 1587 /// certain names, for example) and for performance, since name 1588 /// lookup is often a bottleneck in the compilation of C++. Name 1589 /// lookup criteria is specified via the LookupCriteria enumeration. 1590 /// 1591 /// The results of name lookup can vary based on the kind of name 1592 /// lookup performed, the current language, and the translation 1593 /// unit. In C, for example, name lookup will either return nothing 1594 /// (no entity found) or a single declaration. In C++, name lookup 1595 /// can additionally refer to a set of overloaded functions or 1596 /// result in an ambiguity. All of the possible results of name 1597 /// lookup are captured by the LookupResult class, which provides 1598 /// the ability to distinguish among them. 1599 //@{ 1600 1601 /// @brief Describes the kind of name lookup to perform. 1602 enum LookupNameKind { 1603 /// Ordinary name lookup, which finds ordinary names (functions, 1604 /// variables, typedefs, etc.) in C and most kinds of names 1605 /// (functions, variables, members, types, etc.) in C++. 1606 LookupOrdinaryName = 0, 1607 /// Tag name lookup, which finds the names of enums, classes, 1608 /// structs, and unions. 1609 LookupTagName, 1610 /// Label name lookup. 1611 LookupLabel, 1612 /// Member name lookup, which finds the names of 1613 /// class/struct/union members. 1614 LookupMemberName, 1615 /// Look up of an operator name (e.g., operator+) for use with 1616 /// operator overloading. This lookup is similar to ordinary name 1617 /// lookup, but will ignore any declarations that are class members. 1618 LookupOperatorName, 1619 /// Look up of a name that precedes the '::' scope resolution 1620 /// operator in C++. This lookup completely ignores operator, object, 1621 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1622 LookupNestedNameSpecifierName, 1623 /// Look up a namespace name within a C++ using directive or 1624 /// namespace alias definition, ignoring non-namespace names (C++ 1625 /// [basic.lookup.udir]p1). 1626 LookupNamespaceName, 1627 /// Look up all declarations in a scope with the given name, 1628 /// including resolved using declarations. This is appropriate 1629 /// for checking redeclarations for a using declaration. 1630 LookupUsingDeclName, 1631 /// Look up an ordinary name that is going to be redeclared as a 1632 /// name with linkage. This lookup ignores any declarations that 1633 /// are outside of the current scope unless they have linkage. See 1634 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1635 LookupRedeclarationWithLinkage, 1636 /// Look up the name of an Objective-C protocol. 1637 LookupObjCProtocolName, 1638 /// \brief Look up any declaration with any name. 1639 LookupAnyName 1640 }; 1641 1642 /// \brief Specifies whether (or how) name lookup is being performed for a 1643 /// redeclaration (vs. a reference). 1644 enum RedeclarationKind { 1645 /// \brief The lookup is a reference to this name that is not for the 1646 /// purpose of redeclaring the name. 1647 NotForRedeclaration = 0, 1648 /// \brief The lookup results will be used for redeclaration of a name, 1649 /// if an entity by that name already exists. 1650 ForRedeclaration 1651 }; 1652 1653private: 1654 bool CppLookupName(LookupResult &R, Scope *S); 1655 1656 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1657 CXXSpecialMember SM, 1658 bool ConstArg, 1659 bool VolatileArg, 1660 bool RValueThis, 1661 bool ConstThis, 1662 bool VolatileThis); 1663 1664public: 1665 /// \brief Look up a name, looking for a single declaration. Return 1666 /// null if the results were absent, ambiguous, or overloaded. 1667 /// 1668 /// It is preferable to use the elaborated form and explicitly handle 1669 /// ambiguity and overloaded. 1670 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1671 SourceLocation Loc, 1672 LookupNameKind NameKind, 1673 RedeclarationKind Redecl 1674 = NotForRedeclaration); 1675 bool LookupName(LookupResult &R, Scope *S, 1676 bool AllowBuiltinCreation = false); 1677 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1678 bool InUnqualifiedLookup = false); 1679 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1680 bool AllowBuiltinCreation = false, 1681 bool EnteringContext = false); 1682 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1683 1684 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1685 QualType T1, QualType T2, 1686 UnresolvedSetImpl &Functions); 1687 1688 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1689 SourceLocation GnuLabelLoc = SourceLocation()); 1690 1691 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1692 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1693 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1694 unsigned Quals, 1695 bool *ConstParam = 0); 1696 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1697 bool RValueThis, unsigned ThisQuals, 1698 bool *ConstParam = 0); 1699 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1700 1701 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1702 Expr **Args, unsigned NumArgs, 1703 ADLResult &Functions, 1704 bool StdNamespaceIsAssociated = false); 1705 1706 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1707 VisibleDeclConsumer &Consumer, 1708 bool IncludeGlobalScope = true); 1709 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1710 VisibleDeclConsumer &Consumer, 1711 bool IncludeGlobalScope = true); 1712 1713 /// \brief The context in which typo-correction occurs. 1714 /// 1715 /// The typo-correction context affects which keywords (if any) are 1716 /// considered when trying to correct for typos. 1717 enum CorrectTypoContext { 1718 /// \brief An unknown context, where any keyword might be valid. 1719 CTC_Unknown, 1720 /// \brief A context where no keywords are used (e.g. we expect an actual 1721 /// name). 1722 CTC_NoKeywords, 1723 /// \brief A context where we're correcting a type name. 1724 CTC_Type, 1725 /// \brief An expression context. 1726 CTC_Expression, 1727 /// \brief A type cast, or anything else that can be followed by a '<'. 1728 CTC_CXXCasts, 1729 /// \brief A member lookup context. 1730 CTC_MemberLookup, 1731 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1732 CTC_ObjCIvarLookup, 1733 /// \brief An Objective-C property lookup context (e.g., self.prop). 1734 CTC_ObjCPropertyLookup, 1735 /// \brief The receiver of an Objective-C message send within an 1736 /// Objective-C method where 'super' is a valid keyword. 1737 CTC_ObjCMessageReceiver 1738 }; 1739 1740 DeclarationName CorrectTypo(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1741 DeclContext *MemberContext = 0, 1742 bool EnteringContext = false, 1743 CorrectTypoContext CTC = CTC_Unknown, 1744 const ObjCObjectPointerType *OPT = 0); 1745 1746 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1747 AssociatedNamespaceSet &AssociatedNamespaces, 1748 AssociatedClassSet &AssociatedClasses); 1749 1750 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1751 bool ConsiderLinkage, 1752 bool ExplicitInstantiationOrSpecialization); 1753 1754 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1755 //@} 1756 1757 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1758 SourceLocation IdLoc, 1759 bool TypoCorrection = false); 1760 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1761 Scope *S, bool ForRedeclaration, 1762 SourceLocation Loc); 1763 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1764 Scope *S); 1765 void AddKnownFunctionAttributes(FunctionDecl *FD); 1766 1767 // More parsing and symbol table subroutines. 1768 1769 // Decl attributes - this routine is the top level dispatcher. 1770 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1771 bool NonInheritable = true, bool Inheritable = true); 1772 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1773 bool NonInheritable = true, bool Inheritable = true); 1774 1775 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1776 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1777 bool CheckNoReturnAttr(const AttributeList &attr); 1778 1779 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1780 bool &IncompleteImpl, unsigned DiagID); 1781 void WarnConflictingTypedMethods(ObjCMethodDecl *ImpMethod, 1782 ObjCMethodDecl *MethodDecl, 1783 bool IsProtocolMethodDecl); 1784 1785 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1786 ObjCInterfaceDecl *IDecl); 1787 1788 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1789 1790 /// CheckProtocolMethodDefs - This routine checks unimplemented 1791 /// methods declared in protocol, and those referenced by it. 1792 /// \param IDecl - Used for checking for methods which may have been 1793 /// inherited. 1794 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1795 ObjCProtocolDecl *PDecl, 1796 bool& IncompleteImpl, 1797 const SelectorSet &InsMap, 1798 const SelectorSet &ClsMap, 1799 ObjCContainerDecl *CDecl); 1800 1801 /// CheckImplementationIvars - This routine checks if the instance variables 1802 /// listed in the implelementation match those listed in the interface. 1803 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1804 ObjCIvarDecl **Fields, unsigned nIvars, 1805 SourceLocation Loc); 1806 1807 /// \brief Determine whether we can synthesize a provisional ivar for the 1808 /// given name. 1809 ObjCPropertyDecl *canSynthesizeProvisionalIvar(IdentifierInfo *II); 1810 1811 /// \brief Determine whether we can synthesize a provisional ivar for the 1812 /// given property. 1813 bool canSynthesizeProvisionalIvar(ObjCPropertyDecl *Property); 1814 1815 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1816 /// remains unimplemented in the class or category @implementation. 1817 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1818 ObjCContainerDecl* IDecl, 1819 bool IncompleteImpl = false); 1820 1821 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1822 /// which must be implemented by this implementation. 1823 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1824 ObjCContainerDecl *CDecl, 1825 const SelectorSet &InsMap); 1826 1827 /// DefaultSynthesizeProperties - This routine default synthesizes all 1828 /// properties which must be synthesized in class's @implementation. 1829 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1830 ObjCInterfaceDecl *IDecl); 1831 1832 /// CollectImmediateProperties - This routine collects all properties in 1833 /// the class and its conforming protocols; but not those it its super class. 1834 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1835 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1836 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1837 1838 1839 /// LookupPropertyDecl - Looks up a property in the current class and all 1840 /// its protocols. 1841 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1842 IdentifierInfo *II); 1843 1844 /// Called by ActOnProperty to handle @property declarations in 1845 //// class extensions. 1846 Decl *HandlePropertyInClassExtension(Scope *S, 1847 ObjCCategoryDecl *CDecl, 1848 SourceLocation AtLoc, 1849 FieldDeclarator &FD, 1850 Selector GetterSel, 1851 Selector SetterSel, 1852 const bool isAssign, 1853 const bool isReadWrite, 1854 const unsigned Attributes, 1855 bool *isOverridingProperty, 1856 TypeSourceInfo *T, 1857 tok::ObjCKeywordKind MethodImplKind); 1858 1859 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1860 /// handle creating the ObjcPropertyDecl for a category or @interface. 1861 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1862 ObjCContainerDecl *CDecl, 1863 SourceLocation AtLoc, 1864 FieldDeclarator &FD, 1865 Selector GetterSel, 1866 Selector SetterSel, 1867 const bool isAssign, 1868 const bool isReadWrite, 1869 const unsigned Attributes, 1870 TypeSourceInfo *T, 1871 tok::ObjCKeywordKind MethodImplKind, 1872 DeclContext *lexicalDC = 0); 1873 1874 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1875 /// warning) when atomic property has one but not the other user-declared 1876 /// setter or getter. 1877 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1878 ObjCContainerDecl* IDecl); 1879 1880 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 1881 1882 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1883 1884 enum MethodMatchStrategy { 1885 MMS_loose, 1886 MMS_strict 1887 }; 1888 1889 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1890 /// true, or false, accordingly. 1891 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1892 const ObjCMethodDecl *PrevMethod, 1893 MethodMatchStrategy strategy = MMS_strict); 1894 1895 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1896 /// or protocol against those declared in their implementations. 1897 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1898 const SelectorSet &ClsMap, 1899 SelectorSet &InsMapSeen, 1900 SelectorSet &ClsMapSeen, 1901 ObjCImplDecl* IMPDecl, 1902 ObjCContainerDecl* IDecl, 1903 bool &IncompleteImpl, 1904 bool ImmediateClass); 1905 1906private: 1907 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1908 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1909 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1910 1911 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1912 /// optionally warns if there are multiple signatures. 1913 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1914 bool receiverIdOrClass, 1915 bool warn, bool instance); 1916 1917public: 1918 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1919 /// unit are added to a global pool. This allows us to efficiently associate 1920 /// a selector with a method declaraation for purposes of typechecking 1921 /// messages sent to "id" (where the class of the object is unknown). 1922 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1923 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1924 } 1925 1926 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1927 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1928 AddMethodToGlobalPool(Method, impl, /*instance*/false); 1929 } 1930 1931 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 1932 /// there are multiple signatures. 1933 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 1934 bool receiverIdOrClass=false, 1935 bool warn=true) { 1936 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1937 warn, /*instance*/true); 1938 } 1939 1940 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 1941 /// there are multiple signatures. 1942 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 1943 bool receiverIdOrClass=false, 1944 bool warn=true) { 1945 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1946 warn, /*instance*/false); 1947 } 1948 1949 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 1950 /// implementation. 1951 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 1952 1953 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 1954 /// initialization. 1955 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 1956 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 1957 1958 //===--------------------------------------------------------------------===// 1959 // Statement Parsing Callbacks: SemaStmt.cpp. 1960public: 1961 class FullExprArg { 1962 public: 1963 FullExprArg(Sema &actions) : E(0) { } 1964 1965 // FIXME: The const_cast here is ugly. RValue references would make this 1966 // much nicer (or we could duplicate a bunch of the move semantics 1967 // emulation code from Ownership.h). 1968 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 1969 1970 ExprResult release() { 1971 return move(E); 1972 } 1973 1974 Expr *get() const { return E; } 1975 1976 Expr *operator->() { 1977 return E; 1978 } 1979 1980 private: 1981 // FIXME: No need to make the entire Sema class a friend when it's just 1982 // Sema::MakeFullExpr that needs access to the constructor below. 1983 friend class Sema; 1984 1985 explicit FullExprArg(Expr *expr) : E(expr) {} 1986 1987 Expr *E; 1988 }; 1989 1990 FullExprArg MakeFullExpr(Expr *Arg) { 1991 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 1992 } 1993 1994 StmtResult ActOnExprStmt(FullExprArg Expr); 1995 1996 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 1997 SourceLocation LeadingEmptyMacroLoc = SourceLocation()); 1998 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 1999 MultiStmtArg Elts, 2000 bool isStmtExpr); 2001 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2002 SourceLocation StartLoc, 2003 SourceLocation EndLoc); 2004 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2005 StmtResult ActOnForEachLValueExpr(Expr *E); 2006 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2007 SourceLocation DotDotDotLoc, Expr *RHSVal, 2008 SourceLocation ColonLoc); 2009 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2010 2011 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2012 SourceLocation ColonLoc, 2013 Stmt *SubStmt, Scope *CurScope); 2014 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2015 SourceLocation ColonLoc, Stmt *SubStmt); 2016 2017 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2018 FullExprArg CondVal, Decl *CondVar, 2019 Stmt *ThenVal, 2020 SourceLocation ElseLoc, Stmt *ElseVal); 2021 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2022 Expr *Cond, 2023 Decl *CondVar); 2024 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2025 Stmt *Switch, Stmt *Body); 2026 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2027 FullExprArg Cond, 2028 Decl *CondVar, Stmt *Body); 2029 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2030 SourceLocation WhileLoc, 2031 SourceLocation CondLParen, Expr *Cond, 2032 SourceLocation CondRParen); 2033 2034 StmtResult ActOnForStmt(SourceLocation ForLoc, 2035 SourceLocation LParenLoc, 2036 Stmt *First, FullExprArg Second, 2037 Decl *SecondVar, 2038 FullExprArg Third, 2039 SourceLocation RParenLoc, 2040 Stmt *Body); 2041 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2042 SourceLocation LParenLoc, 2043 Stmt *First, Expr *Second, 2044 SourceLocation RParenLoc, Stmt *Body); 2045 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2046 SourceLocation LParenLoc, Stmt *LoopVar, 2047 SourceLocation ColonLoc, Expr *Collection, 2048 SourceLocation RParenLoc); 2049 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2050 SourceLocation ColonLoc, 2051 Stmt *RangeDecl, Stmt *BeginEndDecl, 2052 Expr *Cond, Expr *Inc, 2053 Stmt *LoopVarDecl, 2054 SourceLocation RParenLoc); 2055 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2056 2057 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2058 SourceLocation LabelLoc, 2059 LabelDecl *TheDecl); 2060 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2061 SourceLocation StarLoc, 2062 Expr *DestExp); 2063 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2064 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2065 2066 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2067 bool AllowFunctionParameters); 2068 2069 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2070 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2071 2072 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2073 bool IsSimple, bool IsVolatile, 2074 unsigned NumOutputs, unsigned NumInputs, 2075 IdentifierInfo **Names, 2076 MultiExprArg Constraints, 2077 MultiExprArg Exprs, 2078 Expr *AsmString, 2079 MultiExprArg Clobbers, 2080 SourceLocation RParenLoc, 2081 bool MSAsm = false); 2082 2083 2084 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2085 SourceLocation StartLoc, 2086 SourceLocation IdLoc, IdentifierInfo *Id, 2087 bool Invalid = false); 2088 2089 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2090 2091 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2092 Decl *Parm, Stmt *Body); 2093 2094 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2095 2096 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2097 MultiStmtArg Catch, Stmt *Finally); 2098 2099 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2100 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2101 Scope *CurScope); 2102 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2103 Expr *SynchExpr, 2104 Stmt *SynchBody); 2105 2106 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2107 2108 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2109 SourceLocation StartLoc, 2110 SourceLocation IdLoc, 2111 IdentifierInfo *Id); 2112 2113 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2114 2115 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2116 Decl *ExDecl, Stmt *HandlerBlock); 2117 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2118 MultiStmtArg Handlers); 2119 2120 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2121 SourceLocation TryLoc, 2122 Stmt *TryBlock, 2123 Stmt *Handler); 2124 2125 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2126 Expr *FilterExpr, 2127 Stmt *Block); 2128 2129 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2130 Stmt *Block); 2131 2132 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2133 2134 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2135 2136 /// \brief If it's a file scoped decl that must warn if not used, keep track 2137 /// of it. 2138 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2139 2140 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2141 /// whose result is unused, warn. 2142 void DiagnoseUnusedExprResult(const Stmt *S); 2143 void DiagnoseUnusedDecl(const NamedDecl *ND); 2144 2145 ParsingDeclState PushParsingDeclaration() { 2146 return DelayedDiagnostics.pushParsingDecl(); 2147 } 2148 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2149 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2150 } 2151 2152 typedef ProcessingContextState ParsingClassState; 2153 ParsingClassState PushParsingClass() { 2154 return DelayedDiagnostics.pushContext(); 2155 } 2156 void PopParsingClass(ParsingClassState state) { 2157 DelayedDiagnostics.popContext(state); 2158 } 2159 2160 void EmitDeprecationWarning(NamedDecl *D, llvm::StringRef Message, 2161 SourceLocation Loc, 2162 const ObjCInterfaceDecl *UnknownObjCClass=0); 2163 2164 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2165 2166 bool makeUnavailableInSystemHeader(SourceLocation loc, 2167 llvm::StringRef message); 2168 2169 //===--------------------------------------------------------------------===// 2170 // Expression Parsing Callbacks: SemaExpr.cpp. 2171 2172 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2173 const ObjCInterfaceDecl *UnknownObjCClass=0); 2174 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2175 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2176 ObjCMethodDecl *Getter, 2177 SourceLocation Loc); 2178 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2179 Expr **Args, unsigned NumArgs); 2180 2181 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 2182 2183 void PopExpressionEvaluationContext(); 2184 2185 void DiscardCleanupsInEvaluationContext(); 2186 2187 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 2188 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2189 void MarkDeclarationsReferencedInExpr(Expr *E); 2190 2191 /// \brief Figure out if an expression could be turned into a call. 2192 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2193 UnresolvedSetImpl &NonTemplateOverloads); 2194 /// \brief Give notes for a set of overloads. 2195 void NoteOverloads(const UnresolvedSetImpl &Overloads, 2196 const SourceLocation FinalNoteLoc); 2197 2198 /// \brief Conditionally issue a diagnostic based on the current 2199 /// evaluation context. 2200 /// 2201 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2202 /// the function body is parsed, and then do a basic reachability analysis to 2203 /// determine if the statement is reachable. If it is unreachable, the 2204 /// diagnostic will not be emitted. 2205 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *stmt, 2206 const PartialDiagnostic &PD); 2207 2208 // Primary Expressions. 2209 SourceRange getExprRange(Expr *E) const; 2210 2211 ObjCIvarDecl *SynthesizeProvisionalIvar(LookupResult &Lookup, 2212 IdentifierInfo *II, 2213 SourceLocation NameLoc); 2214 2215 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Name, 2216 bool HasTrailingLParen, bool IsAddressOfOperand); 2217 2218 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2219 TemplateArgumentListInfo &Buffer, 2220 DeclarationNameInfo &NameInfo, 2221 const TemplateArgumentListInfo *&TemplateArgs); 2222 2223 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2224 CorrectTypoContext CTC = CTC_Unknown); 2225 2226 ExprResult LookupInObjCMethod(LookupResult &R, Scope *S, IdentifierInfo *II, 2227 bool AllowBuiltinCreation=false); 2228 2229 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2230 const DeclarationNameInfo &NameInfo, 2231 bool isAddressOfOperand, 2232 const TemplateArgumentListInfo *TemplateArgs); 2233 2234 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2235 ExprValueKind VK, 2236 SourceLocation Loc, 2237 const CXXScopeSpec *SS = 0); 2238 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2239 ExprValueKind VK, 2240 const DeclarationNameInfo &NameInfo, 2241 const CXXScopeSpec *SS = 0); 2242 ExprResult 2243 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2244 SourceLocation nameLoc, 2245 IndirectFieldDecl *indirectField, 2246 Expr *baseObjectExpr = 0, 2247 SourceLocation opLoc = SourceLocation()); 2248 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2249 LookupResult &R, 2250 const TemplateArgumentListInfo *TemplateArgs); 2251 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2252 LookupResult &R, 2253 const TemplateArgumentListInfo *TemplateArgs, 2254 bool IsDefiniteInstance); 2255 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2256 const LookupResult &R, 2257 bool HasTrailingLParen); 2258 2259 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2260 const DeclarationNameInfo &NameInfo); 2261 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2262 const DeclarationNameInfo &NameInfo, 2263 const TemplateArgumentListInfo *TemplateArgs); 2264 2265 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2266 LookupResult &R, 2267 bool ADL); 2268 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2269 const DeclarationNameInfo &NameInfo, 2270 NamedDecl *D); 2271 2272 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2273 ExprResult ActOnNumericConstant(const Token &); 2274 ExprResult ActOnCharacterConstant(const Token &); 2275 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *Val); 2276 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2277 SourceLocation R, 2278 MultiExprArg Val, 2279 ParsedType TypeOfCast = ParsedType()); 2280 2281 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2282 /// fragments (e.g. "foo" "bar" L"baz"). 2283 ExprResult ActOnStringLiteral(const Token *Toks, unsigned NumToks); 2284 2285 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2286 SourceLocation DefaultLoc, 2287 SourceLocation RParenLoc, 2288 Expr *ControllingExpr, 2289 MultiTypeArg Types, 2290 MultiExprArg Exprs); 2291 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2292 SourceLocation DefaultLoc, 2293 SourceLocation RParenLoc, 2294 Expr *ControllingExpr, 2295 TypeSourceInfo **Types, 2296 Expr **Exprs, 2297 unsigned NumAssocs); 2298 2299 // Binary/Unary Operators. 'Tok' is the token for the operator. 2300 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2301 Expr *InputArg); 2302 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2303 UnaryOperatorKind Opc, Expr *input); 2304 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2305 tok::TokenKind Op, Expr *Input); 2306 2307 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *T, 2308 SourceLocation OpLoc, 2309 UnaryExprOrTypeTrait ExprKind, 2310 SourceRange R); 2311 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2312 UnaryExprOrTypeTrait ExprKind); 2313 ExprResult 2314 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2315 UnaryExprOrTypeTrait ExprKind, 2316 bool isType, void *TyOrEx, 2317 const SourceRange &ArgRange); 2318 2319 ExprResult CheckPlaceholderExpr(Expr *E); 2320 bool CheckVecStepExpr(Expr *E); 2321 2322 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2323 bool CheckUnaryExprOrTypeTraitOperand(QualType type, SourceLocation OpLoc, 2324 SourceRange R, 2325 UnaryExprOrTypeTrait ExprKind); 2326 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2327 SourceLocation OpLoc, 2328 IdentifierInfo &Name, 2329 SourceLocation NameLoc, 2330 SourceLocation RParenLoc); 2331 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2332 tok::TokenKind Kind, Expr *Input); 2333 2334 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2335 Expr *Idx, SourceLocation RLoc); 2336 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2337 Expr *Idx, SourceLocation RLoc); 2338 2339 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2340 SourceLocation OpLoc, bool IsArrow, 2341 CXXScopeSpec &SS, 2342 NamedDecl *FirstQualifierInScope, 2343 const DeclarationNameInfo &NameInfo, 2344 const TemplateArgumentListInfo *TemplateArgs); 2345 2346 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2347 SourceLocation OpLoc, bool IsArrow, 2348 const CXXScopeSpec &SS, 2349 NamedDecl *FirstQualifierInScope, 2350 LookupResult &R, 2351 const TemplateArgumentListInfo *TemplateArgs, 2352 bool SuppressQualifierCheck = false); 2353 2354 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2355 bool &IsArrow, SourceLocation OpLoc, 2356 CXXScopeSpec &SS, 2357 Decl *ObjCImpDecl, 2358 bool HasTemplateArgs); 2359 2360 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2361 const CXXScopeSpec &SS, 2362 const LookupResult &R); 2363 2364 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2365 bool IsArrow, SourceLocation OpLoc, 2366 const CXXScopeSpec &SS, 2367 NamedDecl *FirstQualifierInScope, 2368 const DeclarationNameInfo &NameInfo, 2369 const TemplateArgumentListInfo *TemplateArgs); 2370 2371 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2372 SourceLocation OpLoc, 2373 tok::TokenKind OpKind, 2374 CXXScopeSpec &SS, 2375 UnqualifiedId &Member, 2376 Decl *ObjCImpDecl, 2377 bool HasTrailingLParen); 2378 2379 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2380 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2381 FunctionDecl *FDecl, 2382 const FunctionProtoType *Proto, 2383 Expr **Args, unsigned NumArgs, 2384 SourceLocation RParenLoc); 2385 2386 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2387 /// This provides the location of the left/right parens and a list of comma 2388 /// locations. 2389 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2390 MultiExprArg Args, SourceLocation RParenLoc, 2391 Expr *ExecConfig = 0); 2392 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2393 SourceLocation LParenLoc, 2394 Expr **Args, unsigned NumArgs, 2395 SourceLocation RParenLoc, 2396 Expr *ExecConfig = 0); 2397 2398 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2399 MultiExprArg ExecConfig, SourceLocation GGGLoc); 2400 2401 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2402 ParsedType Ty, SourceLocation RParenLoc, 2403 Expr *Op); 2404 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2405 TypeSourceInfo *Ty, 2406 SourceLocation RParenLoc, 2407 Expr *Op); 2408 2409 bool TypeIsVectorType(ParsedType Ty) { 2410 return GetTypeFromParser(Ty)->isVectorType(); 2411 } 2412 2413 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2414 ExprResult ActOnCastOfParenListExpr(Scope *S, SourceLocation LParenLoc, 2415 SourceLocation RParenLoc, Expr *E, 2416 TypeSourceInfo *TInfo); 2417 2418 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2419 ParsedType Ty, 2420 SourceLocation RParenLoc, 2421 Expr *Op); 2422 2423 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2424 TypeSourceInfo *TInfo, 2425 SourceLocation RParenLoc, 2426 Expr *InitExpr); 2427 2428 ExprResult ActOnInitList(SourceLocation LParenLoc, 2429 MultiExprArg InitList, 2430 SourceLocation RParenLoc); 2431 2432 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2433 SourceLocation Loc, 2434 bool GNUSyntax, 2435 ExprResult Init); 2436 2437 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2438 tok::TokenKind Kind, Expr *LHS, Expr *RHS); 2439 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2440 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2441 ExprResult CreateBuiltinBinOp(SourceLocation TokLoc, 2442 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2443 2444 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2445 /// in the case of a the GNU conditional expr extension. 2446 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2447 SourceLocation ColonLoc, 2448 Expr *Cond, Expr *LHS, Expr *RHS); 2449 2450 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2451 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2452 LabelDecl *LD); 2453 2454 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2455 SourceLocation RPLoc); // "({..})" 2456 2457 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2458 struct OffsetOfComponent { 2459 SourceLocation LocStart, LocEnd; 2460 bool isBrackets; // true if [expr], false if .ident 2461 union { 2462 IdentifierInfo *IdentInfo; 2463 ExprTy *E; 2464 } U; 2465 }; 2466 2467 /// __builtin_offsetof(type, a.b[123][456].c) 2468 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2469 TypeSourceInfo *TInfo, 2470 OffsetOfComponent *CompPtr, 2471 unsigned NumComponents, 2472 SourceLocation RParenLoc); 2473 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2474 SourceLocation BuiltinLoc, 2475 SourceLocation TypeLoc, 2476 ParsedType Arg1, 2477 OffsetOfComponent *CompPtr, 2478 unsigned NumComponents, 2479 SourceLocation RParenLoc); 2480 2481 // __builtin_choose_expr(constExpr, expr1, expr2) 2482 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2483 Expr *cond, Expr *expr1, 2484 Expr *expr2, SourceLocation RPLoc); 2485 2486 // __builtin_va_arg(expr, type) 2487 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, 2488 Expr *expr, ParsedType type, 2489 SourceLocation RPLoc); 2490 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, 2491 Expr *expr, TypeSourceInfo *TInfo, 2492 SourceLocation RPLoc); 2493 2494 // __null 2495 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2496 2497 bool CheckCaseExpression(Expr *expr); 2498 2499 bool CheckMicrosoftIfExistsSymbol(CXXScopeSpec &SS, UnqualifiedId &Name); 2500 2501 //===------------------------- "Block" Extension ------------------------===// 2502 2503 /// ActOnBlockStart - This callback is invoked when a block literal is 2504 /// started. 2505 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2506 2507 /// ActOnBlockArguments - This callback allows processing of block arguments. 2508 /// If there are no arguments, this is still invoked. 2509 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2510 2511 /// ActOnBlockError - If there is an error parsing a block, this callback 2512 /// is invoked to pop the information about the block from the action impl. 2513 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2514 2515 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2516 /// literal was successfully completed. ^(int x){...} 2517 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, 2518 Stmt *Body, Scope *CurScope); 2519 2520 //===---------------------------- OpenCL Features -----------------------===// 2521 2522 /// __builtin_astype(...) 2523 ExprResult ActOnAsTypeExpr(Expr *expr, ParsedType DestTy, 2524 SourceLocation BuiltinLoc, 2525 SourceLocation RParenLoc); 2526 2527 //===---------------------------- C++ Features --------------------------===// 2528 2529 // Act on C++ namespaces 2530 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2531 SourceLocation NamespaceLoc, 2532 SourceLocation IdentLoc, 2533 IdentifierInfo *Ident, 2534 SourceLocation LBrace, 2535 AttributeList *AttrList); 2536 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2537 2538 NamespaceDecl *getStdNamespace() const; 2539 NamespaceDecl *getOrCreateStdNamespace(); 2540 2541 CXXRecordDecl *getStdBadAlloc() const; 2542 2543 Decl *ActOnUsingDirective(Scope *CurScope, 2544 SourceLocation UsingLoc, 2545 SourceLocation NamespcLoc, 2546 CXXScopeSpec &SS, 2547 SourceLocation IdentLoc, 2548 IdentifierInfo *NamespcName, 2549 AttributeList *AttrList); 2550 2551 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2552 2553 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2554 SourceLocation NamespaceLoc, 2555 SourceLocation AliasLoc, 2556 IdentifierInfo *Alias, 2557 CXXScopeSpec &SS, 2558 SourceLocation IdentLoc, 2559 IdentifierInfo *Ident); 2560 2561 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2562 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2563 const LookupResult &PreviousDecls); 2564 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2565 NamedDecl *Target); 2566 2567 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2568 bool isTypeName, 2569 const CXXScopeSpec &SS, 2570 SourceLocation NameLoc, 2571 const LookupResult &Previous); 2572 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2573 const CXXScopeSpec &SS, 2574 SourceLocation NameLoc); 2575 2576 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2577 SourceLocation UsingLoc, 2578 CXXScopeSpec &SS, 2579 const DeclarationNameInfo &NameInfo, 2580 AttributeList *AttrList, 2581 bool IsInstantiation, 2582 bool IsTypeName, 2583 SourceLocation TypenameLoc); 2584 2585 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2586 2587 Decl *ActOnUsingDeclaration(Scope *CurScope, 2588 AccessSpecifier AS, 2589 bool HasUsingKeyword, 2590 SourceLocation UsingLoc, 2591 CXXScopeSpec &SS, 2592 UnqualifiedId &Name, 2593 AttributeList *AttrList, 2594 bool IsTypeName, 2595 SourceLocation TypenameLoc); 2596 Decl *ActOnAliasDeclaration(Scope *CurScope, 2597 AccessSpecifier AS, 2598 MultiTemplateParamsArg TemplateParams, 2599 SourceLocation UsingLoc, 2600 UnqualifiedId &Name, 2601 TypeResult Type); 2602 2603 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2604 /// ActOnDeclarator, when a C++ direct initializer is present. 2605 /// e.g: "int x(1);" 2606 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2607 SourceLocation LParenLoc, 2608 MultiExprArg Exprs, 2609 SourceLocation RParenLoc, 2610 bool TypeMayContainAuto); 2611 2612 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2613 /// and sets it as the initializer for the the passed in VarDecl. 2614 bool InitializeVarWithConstructor(VarDecl *VD, 2615 CXXConstructorDecl *Constructor, 2616 MultiExprArg Exprs); 2617 2618 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2619 /// including handling of its default argument expressions. 2620 /// 2621 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2622 ExprResult 2623 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2624 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2625 bool RequiresZeroInit, unsigned ConstructKind, 2626 SourceRange ParenRange); 2627 2628 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2629 // the constructor can be elidable? 2630 ExprResult 2631 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2632 CXXConstructorDecl *Constructor, bool Elidable, 2633 MultiExprArg Exprs, bool RequiresZeroInit, 2634 unsigned ConstructKind, 2635 SourceRange ParenRange); 2636 2637 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2638 /// the default expr if needed. 2639 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2640 FunctionDecl *FD, 2641 ParmVarDecl *Param); 2642 2643 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2644 /// constructed variable. 2645 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2646 2647 /// \brief Helper class that collects exception specifications for 2648 /// implicitly-declared special member functions. 2649 class ImplicitExceptionSpecification { 2650 // Pointer to allow copying 2651 ASTContext *Context; 2652 // We order exception specifications thus: 2653 // noexcept is the most restrictive, but is only used in C++0x. 2654 // throw() comes next. 2655 // Then a throw(collected exceptions) 2656 // Finally no specification. 2657 // throw(...) is used instead if any called function uses it. 2658 // 2659 // If this exception specification cannot be known yet (for instance, 2660 // because this is the exception specification for a defaulted default 2661 // constructor and we haven't finished parsing the deferred parts of the 2662 // class yet), the C++0x standard does not specify how to behave. We 2663 // record this as an 'unknown' exception specification, which overrules 2664 // any other specification (even 'none', to keep this rule simple). 2665 ExceptionSpecificationType ComputedEST; 2666 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2667 llvm::SmallVector<QualType, 4> Exceptions; 2668 2669 void ClearExceptions() { 2670 ExceptionsSeen.clear(); 2671 Exceptions.clear(); 2672 } 2673 2674 public: 2675 explicit ImplicitExceptionSpecification(ASTContext &Context) 2676 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2677 if (!Context.getLangOptions().CPlusPlus0x) 2678 ComputedEST = EST_DynamicNone; 2679 } 2680 2681 /// \brief Get the computed exception specification type. 2682 ExceptionSpecificationType getExceptionSpecType() const { 2683 assert(ComputedEST != EST_ComputedNoexcept && 2684 "noexcept(expr) should not be a possible result"); 2685 return ComputedEST; 2686 } 2687 2688 /// \brief The number of exceptions in the exception specification. 2689 unsigned size() const { return Exceptions.size(); } 2690 2691 /// \brief The set of exceptions in the exception specification. 2692 const QualType *data() const { return Exceptions.data(); } 2693 2694 /// \brief Integrate another called method into the collected data. 2695 void CalledDecl(CXXMethodDecl *Method); 2696 2697 /// \brief Integrate an invoked expression into the collected data. 2698 void CalledExpr(Expr *E); 2699 2700 /// \brief Specify that the exception specification can't be detemined yet. 2701 void SetDelayed() { 2702 ClearExceptions(); 2703 ComputedEST = EST_Delayed; 2704 } 2705 2706 FunctionProtoType::ExtProtoInfo getEPI() const { 2707 FunctionProtoType::ExtProtoInfo EPI; 2708 EPI.ExceptionSpecType = getExceptionSpecType(); 2709 EPI.NumExceptions = size(); 2710 EPI.Exceptions = data(); 2711 return EPI; 2712 } 2713 }; 2714 2715 /// \brief Determine what sort of exception specification a defaulted 2716 /// copy constructor of a class will have. 2717 ImplicitExceptionSpecification 2718 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2719 2720 /// \brief Determine what sort of exception specification a defaulted 2721 /// default constructor of a class will have, and whether the parameter 2722 /// will be const. 2723 std::pair<ImplicitExceptionSpecification, bool> 2724 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2725 2726 /// \brief Determine what sort of exception specification a defautled 2727 /// copy assignment operator of a class will have, and whether the 2728 /// parameter will be const. 2729 std::pair<ImplicitExceptionSpecification, bool> 2730 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2731 2732 /// \brief Determine what sort of exception specification a defaulted 2733 /// destructor of a class will have. 2734 ImplicitExceptionSpecification 2735 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 2736 2737 /// \brief Determine if a defaulted default constructor ought to be 2738 /// deleted. 2739 bool ShouldDeleteDefaultConstructor(CXXConstructorDecl *CD); 2740 2741 /// \brief Determine if a defaulted copy constructor ought to be 2742 /// deleted. 2743 bool ShouldDeleteCopyConstructor(CXXConstructorDecl *CD); 2744 2745 /// \brief Determine if a defaulted copy assignment operator ought to be 2746 /// deleted. 2747 bool ShouldDeleteCopyAssignmentOperator(CXXMethodDecl *MD); 2748 2749 /// \brief Determine if a defaulted destructor ought to be deleted. 2750 bool ShouldDeleteDestructor(CXXDestructorDecl *DD); 2751 2752 /// \brief Declare the implicit default constructor for the given class. 2753 /// 2754 /// \param ClassDecl The class declaration into which the implicit 2755 /// default constructor will be added. 2756 /// 2757 /// \returns The implicitly-declared default constructor. 2758 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2759 CXXRecordDecl *ClassDecl); 2760 2761 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2762 /// defining this constructor as the default constructor. 2763 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2764 CXXConstructorDecl *Constructor); 2765 2766 /// \brief Declare the implicit destructor for the given class. 2767 /// 2768 /// \param ClassDecl The class declaration into which the implicit 2769 /// destructor will be added. 2770 /// 2771 /// \returns The implicitly-declared destructor. 2772 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2773 2774 /// DefineImplicitDestructor - Checks for feasibility of 2775 /// defining this destructor as the default destructor. 2776 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2777 CXXDestructorDecl *Destructor); 2778 2779 /// \brief Build an exception spec for destructors that don't have one. 2780 /// 2781 /// C++11 says that user-defined destructors with no exception spec get one 2782 /// that looks as if the destructor was implicitly declared. 2783 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 2784 CXXDestructorDecl *Destructor); 2785 2786 /// \brief Declare all inherited constructors for the given class. 2787 /// 2788 /// \param ClassDecl The class declaration into which the inherited 2789 /// constructors will be added. 2790 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2791 2792 /// \brief Declare the implicit copy constructor for the given class. 2793 /// 2794 /// \param S The scope of the class, which may be NULL if this is a 2795 /// template instantiation. 2796 /// 2797 /// \param ClassDecl The class declaration into which the implicit 2798 /// copy constructor will be added. 2799 /// 2800 /// \returns The implicitly-declared copy constructor. 2801 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2802 2803 /// DefineImplicitCopyConstructor - Checks for feasibility of 2804 /// defining this constructor as the copy constructor. 2805 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2806 CXXConstructorDecl *Constructor); 2807 2808 /// \brief Declare the implicit copy assignment operator for the given class. 2809 /// 2810 /// \param S The scope of the class, which may be NULL if this is a 2811 /// template instantiation. 2812 /// 2813 /// \param ClassDecl The class declaration into which the implicit 2814 /// copy-assignment operator will be added. 2815 /// 2816 /// \returns The implicitly-declared copy assignment operator. 2817 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2818 2819 /// \brief Defined an implicitly-declared copy assignment operator. 2820 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2821 CXXMethodDecl *MethodDecl); 2822 2823 /// \brief Force the declaration of any implicitly-declared members of this 2824 /// class. 2825 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2826 2827 /// MaybeBindToTemporary - If the passed in expression has a record type with 2828 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 2829 /// it simply returns the passed in expression. 2830 ExprResult MaybeBindToTemporary(Expr *E); 2831 2832 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 2833 MultiExprArg ArgsPtr, 2834 SourceLocation Loc, 2835 ASTOwningVector<Expr*> &ConvertedArgs); 2836 2837 ParsedType getDestructorName(SourceLocation TildeLoc, 2838 IdentifierInfo &II, SourceLocation NameLoc, 2839 Scope *S, CXXScopeSpec &SS, 2840 ParsedType ObjectType, 2841 bool EnteringContext); 2842 2843 // Checks that reinterpret casts don't have undefined behavior. 2844 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 2845 bool IsDereference, SourceRange Range); 2846 2847 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 2848 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 2849 tok::TokenKind Kind, 2850 SourceLocation LAngleBracketLoc, 2851 ParsedType Ty, 2852 SourceLocation RAngleBracketLoc, 2853 SourceLocation LParenLoc, 2854 Expr *E, 2855 SourceLocation RParenLoc); 2856 2857 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 2858 tok::TokenKind Kind, 2859 TypeSourceInfo *Ty, 2860 Expr *E, 2861 SourceRange AngleBrackets, 2862 SourceRange Parens); 2863 2864 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2865 SourceLocation TypeidLoc, 2866 TypeSourceInfo *Operand, 2867 SourceLocation RParenLoc); 2868 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2869 SourceLocation TypeidLoc, 2870 Expr *Operand, 2871 SourceLocation RParenLoc); 2872 2873 /// ActOnCXXTypeid - Parse typeid( something ). 2874 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 2875 SourceLocation LParenLoc, bool isType, 2876 void *TyOrExpr, 2877 SourceLocation RParenLoc); 2878 2879 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2880 SourceLocation TypeidLoc, 2881 TypeSourceInfo *Operand, 2882 SourceLocation RParenLoc); 2883 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2884 SourceLocation TypeidLoc, 2885 Expr *Operand, 2886 SourceLocation RParenLoc); 2887 2888 /// ActOnCXXUuidof - Parse __uuidof( something ). 2889 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 2890 SourceLocation LParenLoc, bool isType, 2891 void *TyOrExpr, 2892 SourceLocation RParenLoc); 2893 2894 2895 //// ActOnCXXThis - Parse 'this' pointer. 2896 ExprResult ActOnCXXThis(SourceLocation loc); 2897 2898 /// getAndCaptureCurrentThisType - Try to capture a 'this' pointer. Returns 2899 /// the type of the 'this' pointer, or a null type if this is not possible. 2900 QualType getAndCaptureCurrentThisType(); 2901 2902 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 2903 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 2904 2905 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 2906 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 2907 2908 //// ActOnCXXThrow - Parse throw expressions. 2909 ExprResult ActOnCXXThrow(SourceLocation OpLoc, Expr *expr); 2910 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E); 2911 2912 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 2913 /// Can be interpreted either as function-style casting ("int(x)") 2914 /// or class type construction ("ClassType(x,y,z)") 2915 /// or creation of a value-initialized type ("int()"). 2916 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 2917 SourceLocation LParenLoc, 2918 MultiExprArg Exprs, 2919 SourceLocation RParenLoc); 2920 2921 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 2922 SourceLocation LParenLoc, 2923 MultiExprArg Exprs, 2924 SourceLocation RParenLoc); 2925 2926 /// ActOnCXXNew - Parsed a C++ 'new' expression. 2927 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 2928 SourceLocation PlacementLParen, 2929 MultiExprArg PlacementArgs, 2930 SourceLocation PlacementRParen, 2931 SourceRange TypeIdParens, Declarator &D, 2932 SourceLocation ConstructorLParen, 2933 MultiExprArg ConstructorArgs, 2934 SourceLocation ConstructorRParen); 2935 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 2936 SourceLocation PlacementLParen, 2937 MultiExprArg PlacementArgs, 2938 SourceLocation PlacementRParen, 2939 SourceRange TypeIdParens, 2940 QualType AllocType, 2941 TypeSourceInfo *AllocTypeInfo, 2942 Expr *ArraySize, 2943 SourceLocation ConstructorLParen, 2944 MultiExprArg ConstructorArgs, 2945 SourceLocation ConstructorRParen, 2946 bool TypeMayContainAuto = true); 2947 2948 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 2949 SourceRange R); 2950 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 2951 bool UseGlobal, QualType AllocType, bool IsArray, 2952 Expr **PlaceArgs, unsigned NumPlaceArgs, 2953 FunctionDecl *&OperatorNew, 2954 FunctionDecl *&OperatorDelete); 2955 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 2956 DeclarationName Name, Expr** Args, 2957 unsigned NumArgs, DeclContext *Ctx, 2958 bool AllowMissing, FunctionDecl *&Operator, 2959 bool Diagnose = true); 2960 void DeclareGlobalNewDelete(); 2961 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 2962 QualType Argument, 2963 bool addMallocAttr = false); 2964 2965 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 2966 DeclarationName Name, FunctionDecl* &Operator, 2967 bool Diagnose = true); 2968 2969 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 2970 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 2971 bool UseGlobal, bool ArrayForm, 2972 Expr *Operand); 2973 2974 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 2975 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 2976 SourceLocation StmtLoc, 2977 bool ConvertToBoolean); 2978 2979 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 2980 Expr *Operand, SourceLocation RParen); 2981 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 2982 SourceLocation RParen); 2983 2984 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 2985 /// pseudo-functions. 2986 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 2987 SourceLocation KWLoc, 2988 ParsedType Ty, 2989 SourceLocation RParen); 2990 2991 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 2992 SourceLocation KWLoc, 2993 TypeSourceInfo *T, 2994 SourceLocation RParen); 2995 2996 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 2997 /// pseudo-functions. 2998 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 2999 SourceLocation KWLoc, 3000 ParsedType LhsTy, 3001 ParsedType RhsTy, 3002 SourceLocation RParen); 3003 3004 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3005 SourceLocation KWLoc, 3006 TypeSourceInfo *LhsT, 3007 TypeSourceInfo *RhsT, 3008 SourceLocation RParen); 3009 3010 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3011 /// pseudo-functions. 3012 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3013 SourceLocation KWLoc, 3014 ParsedType LhsTy, 3015 Expr *DimExpr, 3016 SourceLocation RParen); 3017 3018 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3019 SourceLocation KWLoc, 3020 TypeSourceInfo *TSInfo, 3021 Expr *DimExpr, 3022 SourceLocation RParen); 3023 3024 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3025 /// pseudo-functions. 3026 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3027 SourceLocation KWLoc, 3028 Expr *Queried, 3029 SourceLocation RParen); 3030 3031 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3032 SourceLocation KWLoc, 3033 Expr *Queried, 3034 SourceLocation RParen); 3035 3036 ExprResult ActOnStartCXXMemberReference(Scope *S, 3037 Expr *Base, 3038 SourceLocation OpLoc, 3039 tok::TokenKind OpKind, 3040 ParsedType &ObjectType, 3041 bool &MayBePseudoDestructor); 3042 3043 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3044 3045 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3046 SourceLocation OpLoc, 3047 tok::TokenKind OpKind, 3048 const CXXScopeSpec &SS, 3049 TypeSourceInfo *ScopeType, 3050 SourceLocation CCLoc, 3051 SourceLocation TildeLoc, 3052 PseudoDestructorTypeStorage DestroyedType, 3053 bool HasTrailingLParen); 3054 3055 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3056 SourceLocation OpLoc, 3057 tok::TokenKind OpKind, 3058 CXXScopeSpec &SS, 3059 UnqualifiedId &FirstTypeName, 3060 SourceLocation CCLoc, 3061 SourceLocation TildeLoc, 3062 UnqualifiedId &SecondTypeName, 3063 bool HasTrailingLParen); 3064 3065 /// MaybeCreateExprWithCleanups - If the current full-expression 3066 /// requires any cleanups, surround it with a ExprWithCleanups node. 3067 /// Otherwise, just returns the passed-in expression. 3068 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3069 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3070 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3071 3072 ExprResult ActOnFinishFullExpr(Expr *Expr); 3073 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3074 3075 // Marks SS invalid if it represents an incomplete type. 3076 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3077 3078 DeclContext *computeDeclContext(QualType T); 3079 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3080 bool EnteringContext = false); 3081 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3082 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3083 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3084 3085 /// \brief The parser has parsed a global nested-name-specifier '::'. 3086 /// 3087 /// \param S The scope in which this nested-name-specifier occurs. 3088 /// 3089 /// \param CCLoc The location of the '::'. 3090 /// 3091 /// \param SS The nested-name-specifier, which will be updated in-place 3092 /// to reflect the parsed nested-name-specifier. 3093 /// 3094 /// \returns true if an error occurred, false otherwise. 3095 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3096 CXXScopeSpec &SS); 3097 3098 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3099 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3100 3101 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3102 SourceLocation IdLoc, 3103 IdentifierInfo &II, 3104 ParsedType ObjectType); 3105 3106 bool BuildCXXNestedNameSpecifier(Scope *S, 3107 IdentifierInfo &Identifier, 3108 SourceLocation IdentifierLoc, 3109 SourceLocation CCLoc, 3110 QualType ObjectType, 3111 bool EnteringContext, 3112 CXXScopeSpec &SS, 3113 NamedDecl *ScopeLookupResult, 3114 bool ErrorRecoveryLookup); 3115 3116 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3117 /// 3118 /// \param S The scope in which this nested-name-specifier occurs. 3119 /// 3120 /// \param Identifier The identifier preceding the '::'. 3121 /// 3122 /// \param IdentifierLoc The location of the identifier. 3123 /// 3124 /// \param CCLoc The location of the '::'. 3125 /// 3126 /// \param ObjectType The type of the object, if we're parsing 3127 /// nested-name-specifier in a member access expression. 3128 /// 3129 /// \param EnteringContext Whether we're entering the context nominated by 3130 /// this nested-name-specifier. 3131 /// 3132 /// \param SS The nested-name-specifier, which is both an input 3133 /// parameter (the nested-name-specifier before this type) and an 3134 /// output parameter (containing the full nested-name-specifier, 3135 /// including this new type). 3136 /// 3137 /// \returns true if an error occurred, false otherwise. 3138 bool ActOnCXXNestedNameSpecifier(Scope *S, 3139 IdentifierInfo &Identifier, 3140 SourceLocation IdentifierLoc, 3141 SourceLocation CCLoc, 3142 ParsedType ObjectType, 3143 bool EnteringContext, 3144 CXXScopeSpec &SS); 3145 3146 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3147 IdentifierInfo &Identifier, 3148 SourceLocation IdentifierLoc, 3149 SourceLocation ColonLoc, 3150 ParsedType ObjectType, 3151 bool EnteringContext); 3152 3153 /// \brief The parser has parsed a nested-name-specifier 3154 /// 'template[opt] template-name < template-args >::'. 3155 /// 3156 /// \param S The scope in which this nested-name-specifier occurs. 3157 /// 3158 /// \param TemplateLoc The location of the 'template' keyword, if any. 3159 /// 3160 /// \param SS The nested-name-specifier, which is both an input 3161 /// parameter (the nested-name-specifier before this type) and an 3162 /// output parameter (containing the full nested-name-specifier, 3163 /// including this new type). 3164 /// 3165 /// \param TemplateLoc the location of the 'template' keyword, if any. 3166 /// \param TemplateName The template name. 3167 /// \param TemplateNameLoc The location of the template name. 3168 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3169 /// \param TemplateArgs The template arguments. 3170 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3171 /// \param CCLoc The location of the '::'. 3172 3173 /// \param EnteringContext Whether we're entering the context of the 3174 /// nested-name-specifier. 3175 /// 3176 /// 3177 /// \returns true if an error occurred, false otherwise. 3178 bool ActOnCXXNestedNameSpecifier(Scope *S, 3179 SourceLocation TemplateLoc, 3180 CXXScopeSpec &SS, 3181 TemplateTy Template, 3182 SourceLocation TemplateNameLoc, 3183 SourceLocation LAngleLoc, 3184 ASTTemplateArgsPtr TemplateArgs, 3185 SourceLocation RAngleLoc, 3186 SourceLocation CCLoc, 3187 bool EnteringContext); 3188 3189 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3190 /// that the parser can use later to reconstruct the given 3191 /// nested-name-specifier. 3192 /// 3193 /// \param SS A nested-name-specifier. 3194 /// 3195 /// \returns A pointer containing all of the information in the 3196 /// nested-name-specifier \p SS. 3197 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3198 3199 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3200 /// the nested-name-specifier structure. 3201 /// 3202 /// \param Annotation The annotation pointer, produced by 3203 /// \c SaveNestedNameSpecifierAnnotation(). 3204 /// 3205 /// \param AnnotationRange The source range corresponding to the annotation. 3206 /// 3207 /// \param SS The nested-name-specifier that will be updated with the contents 3208 /// of the annotation pointer. 3209 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3210 SourceRange AnnotationRange, 3211 CXXScopeSpec &SS); 3212 3213 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3214 3215 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3216 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3217 /// After this method is called, according to [C++ 3.4.3p3], names should be 3218 /// looked up in the declarator-id's scope, until the declarator is parsed and 3219 /// ActOnCXXExitDeclaratorScope is called. 3220 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3221 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3222 3223 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3224 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3225 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3226 /// Used to indicate that names should revert to being looked up in the 3227 /// defining scope. 3228 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3229 3230 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3231 /// initializer for the declaration 'Dcl'. 3232 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3233 /// static data member of class X, names should be looked up in the scope of 3234 /// class X. 3235 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3236 3237 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3238 /// initializer for the declaration 'Dcl'. 3239 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3240 3241 // ParseObjCStringLiteral - Parse Objective-C string literals. 3242 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3243 Expr **Strings, 3244 unsigned NumStrings); 3245 3246 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3247 TypeSourceInfo *EncodedTypeInfo, 3248 SourceLocation RParenLoc); 3249 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3250 CXXMethodDecl *Method); 3251 3252 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3253 SourceLocation EncodeLoc, 3254 SourceLocation LParenLoc, 3255 ParsedType Ty, 3256 SourceLocation RParenLoc); 3257 3258 // ParseObjCSelectorExpression - Build selector expression for @selector 3259 ExprResult ParseObjCSelectorExpression(Selector Sel, 3260 SourceLocation AtLoc, 3261 SourceLocation SelLoc, 3262 SourceLocation LParenLoc, 3263 SourceLocation RParenLoc); 3264 3265 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3266 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3267 SourceLocation AtLoc, 3268 SourceLocation ProtoLoc, 3269 SourceLocation LParenLoc, 3270 SourceLocation RParenLoc); 3271 3272 //===--------------------------------------------------------------------===// 3273 // C++ Declarations 3274 // 3275 Decl *ActOnStartLinkageSpecification(Scope *S, 3276 SourceLocation ExternLoc, 3277 SourceLocation LangLoc, 3278 llvm::StringRef Lang, 3279 SourceLocation LBraceLoc); 3280 Decl *ActOnFinishLinkageSpecification(Scope *S, 3281 Decl *LinkageSpec, 3282 SourceLocation RBraceLoc); 3283 3284 3285 //===--------------------------------------------------------------------===// 3286 // C++ Classes 3287 // 3288 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3289 const CXXScopeSpec *SS = 0); 3290 3291 Decl *ActOnAccessSpecifier(AccessSpecifier Access, 3292 SourceLocation ASLoc, 3293 SourceLocation ColonLoc); 3294 3295 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3296 Declarator &D, 3297 MultiTemplateParamsArg TemplateParameterLists, 3298 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3299 Expr *Init, bool HasDeferredInit, 3300 bool IsDefinition); 3301 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3302 Expr *Init); 3303 3304 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3305 Scope *S, 3306 CXXScopeSpec &SS, 3307 IdentifierInfo *MemberOrBase, 3308 ParsedType TemplateTypeTy, 3309 SourceLocation IdLoc, 3310 SourceLocation LParenLoc, 3311 Expr **Args, unsigned NumArgs, 3312 SourceLocation RParenLoc, 3313 SourceLocation EllipsisLoc); 3314 3315 MemInitResult BuildMemberInitializer(ValueDecl *Member, Expr **Args, 3316 unsigned NumArgs, SourceLocation IdLoc, 3317 SourceLocation LParenLoc, 3318 SourceLocation RParenLoc); 3319 3320 MemInitResult BuildBaseInitializer(QualType BaseType, 3321 TypeSourceInfo *BaseTInfo, 3322 Expr **Args, unsigned NumArgs, 3323 SourceLocation LParenLoc, 3324 SourceLocation RParenLoc, 3325 CXXRecordDecl *ClassDecl, 3326 SourceLocation EllipsisLoc); 3327 3328 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3329 Expr **Args, unsigned NumArgs, 3330 SourceLocation BaseLoc, 3331 SourceLocation RParenLoc, 3332 SourceLocation LParenLoc, 3333 CXXRecordDecl *ClassDecl); 3334 3335 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3336 CXXCtorInitializer *Initializer); 3337 3338 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3339 CXXCtorInitializer **Initializers, 3340 unsigned NumInitializers, bool AnyErrors); 3341 3342 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3343 3344 3345 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3346 /// mark all the non-trivial destructors of its members and bases as 3347 /// referenced. 3348 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3349 CXXRecordDecl *Record); 3350 3351 /// \brief The list of classes whose vtables have been used within 3352 /// this translation unit, and the source locations at which the 3353 /// first use occurred. 3354 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3355 3356 /// \brief The list of vtables that are required but have not yet been 3357 /// materialized. 3358 llvm::SmallVector<VTableUse, 16> VTableUses; 3359 3360 /// \brief The set of classes whose vtables have been used within 3361 /// this translation unit, and a bit that will be true if the vtable is 3362 /// required to be emitted (otherwise, it should be emitted only if needed 3363 /// by code generation). 3364 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3365 3366 /// \brief A list of all of the dynamic classes in this translation 3367 /// unit. 3368 llvm::SmallVector<CXXRecordDecl *, 16> DynamicClasses; 3369 3370 /// \brief Note that the vtable for the given class was used at the 3371 /// given location. 3372 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3373 bool DefinitionRequired = false); 3374 3375 /// MarkVirtualMembersReferenced - Will mark all members of the given 3376 /// CXXRecordDecl referenced. 3377 void MarkVirtualMembersReferenced(SourceLocation Loc, 3378 const CXXRecordDecl *RD); 3379 3380 /// \brief Define all of the vtables that have been used in this 3381 /// translation unit and reference any virtual members used by those 3382 /// vtables. 3383 /// 3384 /// \returns true if any work was done, false otherwise. 3385 bool DefineUsedVTables(); 3386 3387 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3388 3389 void ActOnMemInitializers(Decl *ConstructorDecl, 3390 SourceLocation ColonLoc, 3391 MemInitTy **MemInits, unsigned NumMemInits, 3392 bool AnyErrors); 3393 3394 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3395 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3396 Decl *TagDecl, 3397 SourceLocation LBrac, 3398 SourceLocation RBrac, 3399 AttributeList *AttrList); 3400 3401 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3402 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3403 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3404 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3405 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3406 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3407 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3408 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3409 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3410 bool IsInsideALocalClassWithinATemplateFunction(); 3411 3412 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3413 Expr *AssertExpr, 3414 Expr *AssertMessageExpr, 3415 SourceLocation RParenLoc); 3416 3417 FriendDecl *CheckFriendTypeDecl(SourceLocation FriendLoc, 3418 TypeSourceInfo *TSInfo); 3419 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3420 MultiTemplateParamsArg TemplateParams); 3421 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, bool IsDefinition, 3422 MultiTemplateParamsArg TemplateParams); 3423 3424 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3425 StorageClass& SC); 3426 void CheckConstructor(CXXConstructorDecl *Constructor); 3427 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3428 StorageClass& SC); 3429 bool CheckDestructor(CXXDestructorDecl *Destructor); 3430 void CheckConversionDeclarator(Declarator &D, QualType &R, 3431 StorageClass& SC); 3432 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3433 3434 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3435 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3436 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3437 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3438 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3439 3440 //===--------------------------------------------------------------------===// 3441 // C++ Derived Classes 3442 // 3443 3444 /// ActOnBaseSpecifier - Parsed a base specifier 3445 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3446 SourceRange SpecifierRange, 3447 bool Virtual, AccessSpecifier Access, 3448 TypeSourceInfo *TInfo, 3449 SourceLocation EllipsisLoc); 3450 3451 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3452 SourceRange SpecifierRange, 3453 bool Virtual, AccessSpecifier Access, 3454 ParsedType basetype, 3455 SourceLocation BaseLoc, 3456 SourceLocation EllipsisLoc); 3457 3458 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3459 unsigned NumBases); 3460 void ActOnBaseSpecifiers(Decl *ClassDecl, BaseTy **Bases, unsigned NumBases); 3461 3462 bool IsDerivedFrom(QualType Derived, QualType Base); 3463 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3464 3465 // FIXME: I don't like this name. 3466 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3467 3468 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3469 3470 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3471 SourceLocation Loc, SourceRange Range, 3472 CXXCastPath *BasePath = 0, 3473 bool IgnoreAccess = false); 3474 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3475 unsigned InaccessibleBaseID, 3476 unsigned AmbigiousBaseConvID, 3477 SourceLocation Loc, SourceRange Range, 3478 DeclarationName Name, 3479 CXXCastPath *BasePath); 3480 3481 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3482 3483 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3484 /// covariant, according to C++ [class.virtual]p5. 3485 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3486 const CXXMethodDecl *Old); 3487 3488 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3489 /// spec is a subset of base spec. 3490 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3491 const CXXMethodDecl *Old); 3492 3493 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3494 3495 /// CheckOverrideControl - Check C++0x override control semantics. 3496 void CheckOverrideControl(const Decl *D); 3497 3498 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3499 /// overrides a virtual member function marked 'final', according to 3500 /// C++0x [class.virtual]p3. 3501 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3502 const CXXMethodDecl *Old); 3503 3504 3505 //===--------------------------------------------------------------------===// 3506 // C++ Access Control 3507 // 3508 3509 enum AccessResult { 3510 AR_accessible, 3511 AR_inaccessible, 3512 AR_dependent, 3513 AR_delayed 3514 }; 3515 3516 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3517 NamedDecl *PrevMemberDecl, 3518 AccessSpecifier LexicalAS); 3519 3520 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3521 DeclAccessPair FoundDecl); 3522 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3523 DeclAccessPair FoundDecl); 3524 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3525 SourceRange PlacementRange, 3526 CXXRecordDecl *NamingClass, 3527 DeclAccessPair FoundDecl, 3528 bool Diagnose = true); 3529 AccessResult CheckConstructorAccess(SourceLocation Loc, 3530 CXXConstructorDecl *D, 3531 const InitializedEntity &Entity, 3532 AccessSpecifier Access, 3533 bool IsCopyBindingRefToTemp = false); 3534 AccessResult CheckConstructorAccess(SourceLocation Loc, 3535 CXXConstructorDecl *D, 3536 AccessSpecifier Access, 3537 PartialDiagnostic PD); 3538 AccessResult CheckDestructorAccess(SourceLocation Loc, 3539 CXXDestructorDecl *Dtor, 3540 const PartialDiagnostic &PDiag); 3541 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3542 NamedDecl *D, 3543 const PartialDiagnostic &PDiag); 3544 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3545 Expr *ObjectExpr, 3546 Expr *ArgExpr, 3547 DeclAccessPair FoundDecl); 3548 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3549 DeclAccessPair FoundDecl); 3550 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3551 QualType Base, QualType Derived, 3552 const CXXBasePath &Path, 3553 unsigned DiagID, 3554 bool ForceCheck = false, 3555 bool ForceUnprivileged = false); 3556 void CheckLookupAccess(const LookupResult &R); 3557 3558 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3559 const MultiLevelTemplateArgumentList &TemplateArgs); 3560 void PerformDependentDiagnostics(const DeclContext *Pattern, 3561 const MultiLevelTemplateArgumentList &TemplateArgs); 3562 3563 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3564 3565 /// A flag to suppress access checking. 3566 bool SuppressAccessChecking; 3567 3568 /// \brief When true, access checking violations are treated as SFINAE 3569 /// failures rather than hard errors. 3570 bool AccessCheckingSFINAE; 3571 3572 void ActOnStartSuppressingAccessChecks(); 3573 void ActOnStopSuppressingAccessChecks(); 3574 3575 enum AbstractDiagSelID { 3576 AbstractNone = -1, 3577 AbstractReturnType, 3578 AbstractParamType, 3579 AbstractVariableType, 3580 AbstractFieldType, 3581 AbstractArrayType 3582 }; 3583 3584 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3585 const PartialDiagnostic &PD); 3586 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3587 3588 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3589 AbstractDiagSelID SelID = AbstractNone); 3590 3591 //===--------------------------------------------------------------------===// 3592 // C++ Overloaded Operators [C++ 13.5] 3593 // 3594 3595 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3596 3597 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3598 3599 //===--------------------------------------------------------------------===// 3600 // C++ Templates [C++ 14] 3601 // 3602 void FilterAcceptableTemplateNames(LookupResult &R); 3603 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3604 3605 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3606 QualType ObjectType, bool EnteringContext, 3607 bool &MemberOfUnknownSpecialization); 3608 3609 TemplateNameKind isTemplateName(Scope *S, 3610 CXXScopeSpec &SS, 3611 bool hasTemplateKeyword, 3612 UnqualifiedId &Name, 3613 ParsedType ObjectType, 3614 bool EnteringContext, 3615 TemplateTy &Template, 3616 bool &MemberOfUnknownSpecialization); 3617 3618 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3619 SourceLocation IILoc, 3620 Scope *S, 3621 const CXXScopeSpec *SS, 3622 TemplateTy &SuggestedTemplate, 3623 TemplateNameKind &SuggestedKind); 3624 3625 bool DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3626 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3627 3628 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3629 SourceLocation EllipsisLoc, 3630 SourceLocation KeyLoc, 3631 IdentifierInfo *ParamName, 3632 SourceLocation ParamNameLoc, 3633 unsigned Depth, unsigned Position, 3634 SourceLocation EqualLoc, 3635 ParsedType DefaultArg); 3636 3637 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3638 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3639 unsigned Depth, 3640 unsigned Position, 3641 SourceLocation EqualLoc, 3642 Expr *DefaultArg); 3643 Decl *ActOnTemplateTemplateParameter(Scope *S, 3644 SourceLocation TmpLoc, 3645 TemplateParamsTy *Params, 3646 SourceLocation EllipsisLoc, 3647 IdentifierInfo *ParamName, 3648 SourceLocation ParamNameLoc, 3649 unsigned Depth, 3650 unsigned Position, 3651 SourceLocation EqualLoc, 3652 ParsedTemplateArgument DefaultArg); 3653 3654 TemplateParamsTy * 3655 ActOnTemplateParameterList(unsigned Depth, 3656 SourceLocation ExportLoc, 3657 SourceLocation TemplateLoc, 3658 SourceLocation LAngleLoc, 3659 Decl **Params, unsigned NumParams, 3660 SourceLocation RAngleLoc); 3661 3662 /// \brief The context in which we are checking a template parameter 3663 /// list. 3664 enum TemplateParamListContext { 3665 TPC_ClassTemplate, 3666 TPC_FunctionTemplate, 3667 TPC_ClassTemplateMember, 3668 TPC_FriendFunctionTemplate, 3669 TPC_FriendFunctionTemplateDefinition, 3670 TPC_TypeAliasTemplate 3671 }; 3672 3673 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3674 TemplateParameterList *OldParams, 3675 TemplateParamListContext TPC); 3676 TemplateParameterList * 3677 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3678 SourceLocation DeclLoc, 3679 const CXXScopeSpec &SS, 3680 TemplateParameterList **ParamLists, 3681 unsigned NumParamLists, 3682 bool IsFriend, 3683 bool &IsExplicitSpecialization, 3684 bool &Invalid); 3685 3686 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3687 SourceLocation KWLoc, CXXScopeSpec &SS, 3688 IdentifierInfo *Name, SourceLocation NameLoc, 3689 AttributeList *Attr, 3690 TemplateParameterList *TemplateParams, 3691 AccessSpecifier AS, 3692 unsigned NumOuterTemplateParamLists, 3693 TemplateParameterList **OuterTemplateParamLists); 3694 3695 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3696 TemplateArgumentListInfo &Out); 3697 3698 void NoteAllFoundTemplates(TemplateName Name); 3699 3700 QualType CheckTemplateIdType(TemplateName Template, 3701 SourceLocation TemplateLoc, 3702 TemplateArgumentListInfo &TemplateArgs); 3703 3704 TypeResult 3705 ActOnTemplateIdType(CXXScopeSpec &SS, 3706 TemplateTy Template, SourceLocation TemplateLoc, 3707 SourceLocation LAngleLoc, 3708 ASTTemplateArgsPtr TemplateArgs, 3709 SourceLocation RAngleLoc); 3710 3711 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3712 /// such as \c class T::template apply<U>. 3713 /// 3714 /// \param TUK 3715 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3716 TypeSpecifierType TagSpec, 3717 SourceLocation TagLoc, 3718 CXXScopeSpec &SS, 3719 TemplateTy TemplateD, 3720 SourceLocation TemplateLoc, 3721 SourceLocation LAngleLoc, 3722 ASTTemplateArgsPtr TemplateArgsIn, 3723 SourceLocation RAngleLoc); 3724 3725 3726 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3727 LookupResult &R, 3728 bool RequiresADL, 3729 const TemplateArgumentListInfo &TemplateArgs); 3730 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3731 const DeclarationNameInfo &NameInfo, 3732 const TemplateArgumentListInfo &TemplateArgs); 3733 3734 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3735 SourceLocation TemplateKWLoc, 3736 CXXScopeSpec &SS, 3737 UnqualifiedId &Name, 3738 ParsedType ObjectType, 3739 bool EnteringContext, 3740 TemplateTy &Template); 3741 3742 DeclResult 3743 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3744 SourceLocation KWLoc, 3745 CXXScopeSpec &SS, 3746 TemplateTy Template, 3747 SourceLocation TemplateNameLoc, 3748 SourceLocation LAngleLoc, 3749 ASTTemplateArgsPtr TemplateArgs, 3750 SourceLocation RAngleLoc, 3751 AttributeList *Attr, 3752 MultiTemplateParamsArg TemplateParameterLists); 3753 3754 Decl *ActOnTemplateDeclarator(Scope *S, 3755 MultiTemplateParamsArg TemplateParameterLists, 3756 Declarator &D); 3757 3758 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3759 MultiTemplateParamsArg TemplateParameterLists, 3760 Declarator &D); 3761 3762 bool 3763 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3764 TemplateSpecializationKind NewTSK, 3765 NamedDecl *PrevDecl, 3766 TemplateSpecializationKind PrevTSK, 3767 SourceLocation PrevPtOfInstantiation, 3768 bool &SuppressNew); 3769 3770 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3771 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3772 LookupResult &Previous); 3773 3774 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 3775 TemplateArgumentListInfo *ExplicitTemplateArgs, 3776 LookupResult &Previous); 3777 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 3778 3779 DeclResult 3780 ActOnExplicitInstantiation(Scope *S, 3781 SourceLocation ExternLoc, 3782 SourceLocation TemplateLoc, 3783 unsigned TagSpec, 3784 SourceLocation KWLoc, 3785 const CXXScopeSpec &SS, 3786 TemplateTy Template, 3787 SourceLocation TemplateNameLoc, 3788 SourceLocation LAngleLoc, 3789 ASTTemplateArgsPtr TemplateArgs, 3790 SourceLocation RAngleLoc, 3791 AttributeList *Attr); 3792 3793 DeclResult 3794 ActOnExplicitInstantiation(Scope *S, 3795 SourceLocation ExternLoc, 3796 SourceLocation TemplateLoc, 3797 unsigned TagSpec, 3798 SourceLocation KWLoc, 3799 CXXScopeSpec &SS, 3800 IdentifierInfo *Name, 3801 SourceLocation NameLoc, 3802 AttributeList *Attr); 3803 3804 DeclResult ActOnExplicitInstantiation(Scope *S, 3805 SourceLocation ExternLoc, 3806 SourceLocation TemplateLoc, 3807 Declarator &D); 3808 3809 TemplateArgumentLoc 3810 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 3811 SourceLocation TemplateLoc, 3812 SourceLocation RAngleLoc, 3813 Decl *Param, 3814 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3815 3816 /// \brief Specifies the context in which a particular template 3817 /// argument is being checked. 3818 enum CheckTemplateArgumentKind { 3819 /// \brief The template argument was specified in the code or was 3820 /// instantiated with some deduced template arguments. 3821 CTAK_Specified, 3822 3823 /// \brief The template argument was deduced via template argument 3824 /// deduction. 3825 CTAK_Deduced, 3826 3827 /// \brief The template argument was deduced from an array bound 3828 /// via template argument deduction. 3829 CTAK_DeducedFromArrayBound 3830 }; 3831 3832 bool CheckTemplateArgument(NamedDecl *Param, 3833 const TemplateArgumentLoc &Arg, 3834 NamedDecl *Template, 3835 SourceLocation TemplateLoc, 3836 SourceLocation RAngleLoc, 3837 unsigned ArgumentPackIndex, 3838 llvm::SmallVectorImpl<TemplateArgument> &Converted, 3839 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3840 3841 /// \brief Check that the given template arguments can be be provided to 3842 /// the given template, converting the arguments along the way. 3843 /// 3844 /// \param Template The template to which the template arguments are being 3845 /// provided. 3846 /// 3847 /// \param TemplateLoc The location of the template name in the source. 3848 /// 3849 /// \param TemplateArgs The list of template arguments. If the template is 3850 /// a template template parameter, this function may extend the set of 3851 /// template arguments to also include substituted, defaulted template 3852 /// arguments. 3853 /// 3854 /// \param PartialTemplateArgs True if the list of template arguments is 3855 /// intentionally partial, e.g., because we're checking just the initial 3856 /// set of template arguments. 3857 /// 3858 /// \param Converted Will receive the converted, canonicalized template 3859 /// arguments. 3860 /// 3861 /// \returns True if an error occurred, false otherwise. 3862 bool CheckTemplateArgumentList(TemplateDecl *Template, 3863 SourceLocation TemplateLoc, 3864 TemplateArgumentListInfo &TemplateArgs, 3865 bool PartialTemplateArgs, 3866 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3867 3868 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 3869 const TemplateArgumentLoc &Arg, 3870 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3871 3872 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 3873 TypeSourceInfo *Arg); 3874 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 3875 TemplateArgument &Converted); 3876 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 3877 QualType InstantiatedParamType, Expr *Arg, 3878 TemplateArgument &Converted, 3879 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3880 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 3881 const TemplateArgumentLoc &Arg); 3882 3883 ExprResult 3884 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 3885 QualType ParamType, 3886 SourceLocation Loc); 3887 ExprResult 3888 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 3889 SourceLocation Loc); 3890 3891 /// \brief Enumeration describing how template parameter lists are compared 3892 /// for equality. 3893 enum TemplateParameterListEqualKind { 3894 /// \brief We are matching the template parameter lists of two templates 3895 /// that might be redeclarations. 3896 /// 3897 /// \code 3898 /// template<typename T> struct X; 3899 /// template<typename T> struct X; 3900 /// \endcode 3901 TPL_TemplateMatch, 3902 3903 /// \brief We are matching the template parameter lists of two template 3904 /// template parameters as part of matching the template parameter lists 3905 /// of two templates that might be redeclarations. 3906 /// 3907 /// \code 3908 /// template<template<int I> class TT> struct X; 3909 /// template<template<int Value> class Other> struct X; 3910 /// \endcode 3911 TPL_TemplateTemplateParmMatch, 3912 3913 /// \brief We are matching the template parameter lists of a template 3914 /// template argument against the template parameter lists of a template 3915 /// template parameter. 3916 /// 3917 /// \code 3918 /// template<template<int Value> class Metafun> struct X; 3919 /// template<int Value> struct integer_c; 3920 /// X<integer_c> xic; 3921 /// \endcode 3922 TPL_TemplateTemplateArgumentMatch 3923 }; 3924 3925 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 3926 TemplateParameterList *Old, 3927 bool Complain, 3928 TemplateParameterListEqualKind Kind, 3929 SourceLocation TemplateArgLoc 3930 = SourceLocation()); 3931 3932 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 3933 3934 /// \brief Called when the parser has parsed a C++ typename 3935 /// specifier, e.g., "typename T::type". 3936 /// 3937 /// \param S The scope in which this typename type occurs. 3938 /// \param TypenameLoc the location of the 'typename' keyword 3939 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3940 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 3941 /// \param IdLoc the location of the identifier. 3942 TypeResult 3943 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3944 const CXXScopeSpec &SS, const IdentifierInfo &II, 3945 SourceLocation IdLoc); 3946 3947 /// \brief Called when the parser has parsed a C++ typename 3948 /// specifier that ends in a template-id, e.g., 3949 /// "typename MetaFun::template apply<T1, T2>". 3950 /// 3951 /// \param S The scope in which this typename type occurs. 3952 /// \param TypenameLoc the location of the 'typename' keyword 3953 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3954 /// \param TemplateLoc the location of the 'template' keyword, if any. 3955 /// \param TemplateName The template name. 3956 /// \param TemplateNameLoc The location of the template name. 3957 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3958 /// \param TemplateArgs The template arguments. 3959 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3960 TypeResult 3961 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3962 const CXXScopeSpec &SS, 3963 SourceLocation TemplateLoc, 3964 TemplateTy Template, 3965 SourceLocation TemplateNameLoc, 3966 SourceLocation LAngleLoc, 3967 ASTTemplateArgsPtr TemplateArgs, 3968 SourceLocation RAngleLoc); 3969 3970 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 3971 SourceLocation KeywordLoc, 3972 NestedNameSpecifierLoc QualifierLoc, 3973 const IdentifierInfo &II, 3974 SourceLocation IILoc); 3975 3976 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 3977 SourceLocation Loc, 3978 DeclarationName Name); 3979 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 3980 3981 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 3982 3983 std::string 3984 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3985 const TemplateArgumentList &Args); 3986 3987 std::string 3988 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3989 const TemplateArgument *Args, 3990 unsigned NumArgs); 3991 3992 //===--------------------------------------------------------------------===// 3993 // C++ Variadic Templates (C++0x [temp.variadic]) 3994 //===--------------------------------------------------------------------===// 3995 3996 /// \brief The context in which an unexpanded parameter pack is 3997 /// being diagnosed. 3998 /// 3999 /// Note that the values of this enumeration line up with the first 4000 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4001 enum UnexpandedParameterPackContext { 4002 /// \brief An arbitrary expression. 4003 UPPC_Expression = 0, 4004 4005 /// \brief The base type of a class type. 4006 UPPC_BaseType, 4007 4008 /// \brief The type of an arbitrary declaration. 4009 UPPC_DeclarationType, 4010 4011 /// \brief The type of a data member. 4012 UPPC_DataMemberType, 4013 4014 /// \brief The size of a bit-field. 4015 UPPC_BitFieldWidth, 4016 4017 /// \brief The expression in a static assertion. 4018 UPPC_StaticAssertExpression, 4019 4020 /// \brief The fixed underlying type of an enumeration. 4021 UPPC_FixedUnderlyingType, 4022 4023 /// \brief The enumerator value. 4024 UPPC_EnumeratorValue, 4025 4026 /// \brief A using declaration. 4027 UPPC_UsingDeclaration, 4028 4029 /// \brief A friend declaration. 4030 UPPC_FriendDeclaration, 4031 4032 /// \brief A declaration qualifier. 4033 UPPC_DeclarationQualifier, 4034 4035 /// \brief An initializer. 4036 UPPC_Initializer, 4037 4038 /// \brief A default argument. 4039 UPPC_DefaultArgument, 4040 4041 /// \brief The type of a non-type template parameter. 4042 UPPC_NonTypeTemplateParameterType, 4043 4044 /// \brief The type of an exception. 4045 UPPC_ExceptionType, 4046 4047 /// \brief Partial specialization. 4048 UPPC_PartialSpecialization 4049 }; 4050 4051 /// \brief If the given type contains an unexpanded parameter pack, 4052 /// diagnose the error. 4053 /// 4054 /// \param Loc The source location where a diagnostc should be emitted. 4055 /// 4056 /// \param T The type that is being checked for unexpanded parameter 4057 /// packs. 4058 /// 4059 /// \returns true if an error occurred, false otherwise. 4060 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4061 UnexpandedParameterPackContext UPPC); 4062 4063 /// \brief If the given expression contains an unexpanded parameter 4064 /// pack, diagnose the error. 4065 /// 4066 /// \param E The expression that is being checked for unexpanded 4067 /// parameter packs. 4068 /// 4069 /// \returns true if an error occurred, false otherwise. 4070 bool DiagnoseUnexpandedParameterPack(Expr *E, 4071 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4072 4073 /// \brief If the given nested-name-specifier contains an unexpanded 4074 /// parameter pack, diagnose the error. 4075 /// 4076 /// \param SS The nested-name-specifier that is being checked for 4077 /// unexpanded parameter packs. 4078 /// 4079 /// \returns true if an error occurred, false otherwise. 4080 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4081 UnexpandedParameterPackContext UPPC); 4082 4083 /// \brief If the given name contains an unexpanded parameter pack, 4084 /// diagnose the error. 4085 /// 4086 /// \param NameInfo The name (with source location information) that 4087 /// is being checked for unexpanded parameter packs. 4088 /// 4089 /// \returns true if an error occurred, false otherwise. 4090 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4091 UnexpandedParameterPackContext UPPC); 4092 4093 /// \brief If the given template name contains an unexpanded parameter pack, 4094 /// diagnose the error. 4095 /// 4096 /// \param Loc The location of the template name. 4097 /// 4098 /// \param Template The template name that is being checked for unexpanded 4099 /// parameter packs. 4100 /// 4101 /// \returns true if an error occurred, false otherwise. 4102 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4103 TemplateName Template, 4104 UnexpandedParameterPackContext UPPC); 4105 4106 /// \brief If the given template argument contains an unexpanded parameter 4107 /// pack, diagnose the error. 4108 /// 4109 /// \param Arg The template argument that is being checked for unexpanded 4110 /// parameter packs. 4111 /// 4112 /// \returns true if an error occurred, false otherwise. 4113 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4114 UnexpandedParameterPackContext UPPC); 4115 4116 /// \brief Collect the set of unexpanded parameter packs within the given 4117 /// template argument. 4118 /// 4119 /// \param Arg The template argument that will be traversed to find 4120 /// unexpanded parameter packs. 4121 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4122 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4123 4124 /// \brief Collect the set of unexpanded parameter packs within the given 4125 /// template argument. 4126 /// 4127 /// \param Arg The template argument that will be traversed to find 4128 /// unexpanded parameter packs. 4129 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4130 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4131 4132 /// \brief Collect the set of unexpanded parameter packs within the given 4133 /// type. 4134 /// 4135 /// \param T The type that will be traversed to find 4136 /// unexpanded parameter packs. 4137 void collectUnexpandedParameterPacks(QualType T, 4138 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4139 4140 /// \brief Collect the set of unexpanded parameter packs within the given 4141 /// type. 4142 /// 4143 /// \param TL The type that will be traversed to find 4144 /// unexpanded parameter packs. 4145 void collectUnexpandedParameterPacks(TypeLoc TL, 4146 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4147 4148 /// \brief Invoked when parsing a template argument followed by an 4149 /// ellipsis, which creates a pack expansion. 4150 /// 4151 /// \param Arg The template argument preceding the ellipsis, which 4152 /// may already be invalid. 4153 /// 4154 /// \param EllipsisLoc The location of the ellipsis. 4155 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4156 SourceLocation EllipsisLoc); 4157 4158 /// \brief Invoked when parsing a type followed by an ellipsis, which 4159 /// creates a pack expansion. 4160 /// 4161 /// \param Type The type preceding the ellipsis, which will become 4162 /// the pattern of the pack expansion. 4163 /// 4164 /// \param EllipsisLoc The location of the ellipsis. 4165 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4166 4167 /// \brief Construct a pack expansion type from the pattern of the pack 4168 /// expansion. 4169 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4170 SourceLocation EllipsisLoc, 4171 llvm::Optional<unsigned> NumExpansions); 4172 4173 /// \brief Construct a pack expansion type from the pattern of the pack 4174 /// expansion. 4175 QualType CheckPackExpansion(QualType Pattern, 4176 SourceRange PatternRange, 4177 SourceLocation EllipsisLoc, 4178 llvm::Optional<unsigned> NumExpansions); 4179 4180 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4181 /// creates a pack expansion. 4182 /// 4183 /// \param Pattern The expression preceding the ellipsis, which will become 4184 /// the pattern of the pack expansion. 4185 /// 4186 /// \param EllipsisLoc The location of the ellipsis. 4187 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4188 4189 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4190 /// creates a pack expansion. 4191 /// 4192 /// \param Pattern The expression preceding the ellipsis, which will become 4193 /// the pattern of the pack expansion. 4194 /// 4195 /// \param EllipsisLoc The location of the ellipsis. 4196 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4197 llvm::Optional<unsigned> NumExpansions); 4198 4199 /// \brief Determine whether we could expand a pack expansion with the 4200 /// given set of parameter packs into separate arguments by repeatedly 4201 /// transforming the pattern. 4202 /// 4203 /// \param EllipsisLoc The location of the ellipsis that identifies the 4204 /// pack expansion. 4205 /// 4206 /// \param PatternRange The source range that covers the entire pattern of 4207 /// the pack expansion. 4208 /// 4209 /// \param Unexpanded The set of unexpanded parameter packs within the 4210 /// pattern. 4211 /// 4212 /// \param NumUnexpanded The number of unexpanded parameter packs in 4213 /// \p Unexpanded. 4214 /// 4215 /// \param ShouldExpand Will be set to \c true if the transformer should 4216 /// expand the corresponding pack expansions into separate arguments. When 4217 /// set, \c NumExpansions must also be set. 4218 /// 4219 /// \param RetainExpansion Whether the caller should add an unexpanded 4220 /// pack expansion after all of the expanded arguments. This is used 4221 /// when extending explicitly-specified template argument packs per 4222 /// C++0x [temp.arg.explicit]p9. 4223 /// 4224 /// \param NumExpansions The number of separate arguments that will be in 4225 /// the expanded form of the corresponding pack expansion. This is both an 4226 /// input and an output parameter, which can be set by the caller if the 4227 /// number of expansions is known a priori (e.g., due to a prior substitution) 4228 /// and will be set by the callee when the number of expansions is known. 4229 /// The callee must set this value when \c ShouldExpand is \c true; it may 4230 /// set this value in other cases. 4231 /// 4232 /// \returns true if an error occurred (e.g., because the parameter packs 4233 /// are to be instantiated with arguments of different lengths), false 4234 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4235 /// must be set. 4236 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4237 SourceRange PatternRange, 4238 const UnexpandedParameterPack *Unexpanded, 4239 unsigned NumUnexpanded, 4240 const MultiLevelTemplateArgumentList &TemplateArgs, 4241 bool &ShouldExpand, 4242 bool &RetainExpansion, 4243 llvm::Optional<unsigned> &NumExpansions); 4244 4245 /// \brief Determine the number of arguments in the given pack expansion 4246 /// type. 4247 /// 4248 /// This routine already assumes that the pack expansion type can be 4249 /// expanded and that the number of arguments in the expansion is 4250 /// consistent across all of the unexpanded parameter packs in its pattern. 4251 unsigned getNumArgumentsInExpansion(QualType T, 4252 const MultiLevelTemplateArgumentList &TemplateArgs); 4253 4254 /// \brief Determine whether the given declarator contains any unexpanded 4255 /// parameter packs. 4256 /// 4257 /// This routine is used by the parser to disambiguate function declarators 4258 /// with an ellipsis prior to the ')', e.g., 4259 /// 4260 /// \code 4261 /// void f(T...); 4262 /// \endcode 4263 /// 4264 /// To determine whether we have an (unnamed) function parameter pack or 4265 /// a variadic function. 4266 /// 4267 /// \returns true if the declarator contains any unexpanded parameter packs, 4268 /// false otherwise. 4269 bool containsUnexpandedParameterPacks(Declarator &D); 4270 4271 //===--------------------------------------------------------------------===// 4272 // C++ Template Argument Deduction (C++ [temp.deduct]) 4273 //===--------------------------------------------------------------------===// 4274 4275 /// \brief Describes the result of template argument deduction. 4276 /// 4277 /// The TemplateDeductionResult enumeration describes the result of 4278 /// template argument deduction, as returned from 4279 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4280 /// structure provides additional information about the results of 4281 /// template argument deduction, e.g., the deduced template argument 4282 /// list (if successful) or the specific template parameters or 4283 /// deduced arguments that were involved in the failure. 4284 enum TemplateDeductionResult { 4285 /// \brief Template argument deduction was successful. 4286 TDK_Success = 0, 4287 /// \brief Template argument deduction exceeded the maximum template 4288 /// instantiation depth (which has already been diagnosed). 4289 TDK_InstantiationDepth, 4290 /// \brief Template argument deduction did not deduce a value 4291 /// for every template parameter. 4292 TDK_Incomplete, 4293 /// \brief Template argument deduction produced inconsistent 4294 /// deduced values for the given template parameter. 4295 TDK_Inconsistent, 4296 /// \brief Template argument deduction failed due to inconsistent 4297 /// cv-qualifiers on a template parameter type that would 4298 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4299 /// but were given a non-const "X". 4300 TDK_Underqualified, 4301 /// \brief Substitution of the deduced template argument values 4302 /// resulted in an error. 4303 TDK_SubstitutionFailure, 4304 /// \brief Substitution of the deduced template argument values 4305 /// into a non-deduced context produced a type or value that 4306 /// produces a type that does not match the original template 4307 /// arguments provided. 4308 TDK_NonDeducedMismatch, 4309 /// \brief When performing template argument deduction for a function 4310 /// template, there were too many call arguments. 4311 TDK_TooManyArguments, 4312 /// \brief When performing template argument deduction for a function 4313 /// template, there were too few call arguments. 4314 TDK_TooFewArguments, 4315 /// \brief The explicitly-specified template arguments were not valid 4316 /// template arguments for the given template. 4317 TDK_InvalidExplicitArguments, 4318 /// \brief The arguments included an overloaded function name that could 4319 /// not be resolved to a suitable function. 4320 TDK_FailedOverloadResolution 4321 }; 4322 4323 TemplateDeductionResult 4324 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4325 const TemplateArgumentList &TemplateArgs, 4326 sema::TemplateDeductionInfo &Info); 4327 4328 TemplateDeductionResult 4329 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4330 TemplateArgumentListInfo &ExplicitTemplateArgs, 4331 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4332 llvm::SmallVectorImpl<QualType> &ParamTypes, 4333 QualType *FunctionType, 4334 sema::TemplateDeductionInfo &Info); 4335 4336 /// brief A function argument from which we performed template argument 4337 // deduction for a call. 4338 struct OriginalCallArg { 4339 OriginalCallArg(QualType OriginalParamType, 4340 unsigned ArgIdx, 4341 QualType OriginalArgType) 4342 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4343 OriginalArgType(OriginalArgType) { } 4344 4345 QualType OriginalParamType; 4346 unsigned ArgIdx; 4347 QualType OriginalArgType; 4348 }; 4349 4350 TemplateDeductionResult 4351 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4352 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4353 unsigned NumExplicitlySpecified, 4354 FunctionDecl *&Specialization, 4355 sema::TemplateDeductionInfo &Info, 4356 llvm::SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4357 4358 TemplateDeductionResult 4359 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4360 TemplateArgumentListInfo *ExplicitTemplateArgs, 4361 Expr **Args, unsigned NumArgs, 4362 FunctionDecl *&Specialization, 4363 sema::TemplateDeductionInfo &Info); 4364 4365 TemplateDeductionResult 4366 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4367 TemplateArgumentListInfo *ExplicitTemplateArgs, 4368 QualType ArgFunctionType, 4369 FunctionDecl *&Specialization, 4370 sema::TemplateDeductionInfo &Info); 4371 4372 TemplateDeductionResult 4373 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4374 QualType ToType, 4375 CXXConversionDecl *&Specialization, 4376 sema::TemplateDeductionInfo &Info); 4377 4378 TemplateDeductionResult 4379 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4380 TemplateArgumentListInfo *ExplicitTemplateArgs, 4381 FunctionDecl *&Specialization, 4382 sema::TemplateDeductionInfo &Info); 4383 4384 bool DeduceAutoType(TypeSourceInfo *AutoType, Expr *Initializer, 4385 TypeSourceInfo *&Result); 4386 4387 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4388 FunctionTemplateDecl *FT2, 4389 SourceLocation Loc, 4390 TemplatePartialOrderingContext TPOC, 4391 unsigned NumCallArguments); 4392 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4393 UnresolvedSetIterator SEnd, 4394 TemplatePartialOrderingContext TPOC, 4395 unsigned NumCallArguments, 4396 SourceLocation Loc, 4397 const PartialDiagnostic &NoneDiag, 4398 const PartialDiagnostic &AmbigDiag, 4399 const PartialDiagnostic &CandidateDiag, 4400 bool Complain = true); 4401 4402 ClassTemplatePartialSpecializationDecl * 4403 getMoreSpecializedPartialSpecialization( 4404 ClassTemplatePartialSpecializationDecl *PS1, 4405 ClassTemplatePartialSpecializationDecl *PS2, 4406 SourceLocation Loc); 4407 4408 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4409 bool OnlyDeduced, 4410 unsigned Depth, 4411 llvm::SmallVectorImpl<bool> &Used); 4412 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4413 llvm::SmallVectorImpl<bool> &Deduced); 4414 4415 //===--------------------------------------------------------------------===// 4416 // C++ Template Instantiation 4417 // 4418 4419 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4420 const TemplateArgumentList *Innermost = 0, 4421 bool RelativeToPrimary = false, 4422 const FunctionDecl *Pattern = 0); 4423 4424 /// \brief A template instantiation that is currently in progress. 4425 struct ActiveTemplateInstantiation { 4426 /// \brief The kind of template instantiation we are performing 4427 enum InstantiationKind { 4428 /// We are instantiating a template declaration. The entity is 4429 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4430 TemplateInstantiation, 4431 4432 /// We are instantiating a default argument for a template 4433 /// parameter. The Entity is the template, and 4434 /// TemplateArgs/NumTemplateArguments provides the template 4435 /// arguments as specified. 4436 /// FIXME: Use a TemplateArgumentList 4437 DefaultTemplateArgumentInstantiation, 4438 4439 /// We are instantiating a default argument for a function. 4440 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4441 /// provides the template arguments as specified. 4442 DefaultFunctionArgumentInstantiation, 4443 4444 /// We are substituting explicit template arguments provided for 4445 /// a function template. The entity is a FunctionTemplateDecl. 4446 ExplicitTemplateArgumentSubstitution, 4447 4448 /// We are substituting template argument determined as part of 4449 /// template argument deduction for either a class template 4450 /// partial specialization or a function template. The 4451 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4452 /// a FunctionTemplateDecl. 4453 DeducedTemplateArgumentSubstitution, 4454 4455 /// We are substituting prior template arguments into a new 4456 /// template parameter. The template parameter itself is either a 4457 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4458 PriorTemplateArgumentSubstitution, 4459 4460 /// We are checking the validity of a default template argument that 4461 /// has been used when naming a template-id. 4462 DefaultTemplateArgumentChecking 4463 } Kind; 4464 4465 /// \brief The point of instantiation within the source code. 4466 SourceLocation PointOfInstantiation; 4467 4468 /// \brief The template (or partial specialization) in which we are 4469 /// performing the instantiation, for substitutions of prior template 4470 /// arguments. 4471 NamedDecl *Template; 4472 4473 /// \brief The entity that is being instantiated. 4474 uintptr_t Entity; 4475 4476 /// \brief The list of template arguments we are substituting, if they 4477 /// are not part of the entity. 4478 const TemplateArgument *TemplateArgs; 4479 4480 /// \brief The number of template arguments in TemplateArgs. 4481 unsigned NumTemplateArgs; 4482 4483 /// \brief The template deduction info object associated with the 4484 /// substitution or checking of explicit or deduced template arguments. 4485 sema::TemplateDeductionInfo *DeductionInfo; 4486 4487 /// \brief The source range that covers the construct that cause 4488 /// the instantiation, e.g., the template-id that causes a class 4489 /// template instantiation. 4490 SourceRange InstantiationRange; 4491 4492 ActiveTemplateInstantiation() 4493 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4494 NumTemplateArgs(0), DeductionInfo(0) {} 4495 4496 /// \brief Determines whether this template is an actual instantiation 4497 /// that should be counted toward the maximum instantiation depth. 4498 bool isInstantiationRecord() const; 4499 4500 friend bool operator==(const ActiveTemplateInstantiation &X, 4501 const ActiveTemplateInstantiation &Y) { 4502 if (X.Kind != Y.Kind) 4503 return false; 4504 4505 if (X.Entity != Y.Entity) 4506 return false; 4507 4508 switch (X.Kind) { 4509 case TemplateInstantiation: 4510 return true; 4511 4512 case PriorTemplateArgumentSubstitution: 4513 case DefaultTemplateArgumentChecking: 4514 if (X.Template != Y.Template) 4515 return false; 4516 4517 // Fall through 4518 4519 case DefaultTemplateArgumentInstantiation: 4520 case ExplicitTemplateArgumentSubstitution: 4521 case DeducedTemplateArgumentSubstitution: 4522 case DefaultFunctionArgumentInstantiation: 4523 return X.TemplateArgs == Y.TemplateArgs; 4524 4525 } 4526 4527 return true; 4528 } 4529 4530 friend bool operator!=(const ActiveTemplateInstantiation &X, 4531 const ActiveTemplateInstantiation &Y) { 4532 return !(X == Y); 4533 } 4534 }; 4535 4536 /// \brief List of active template instantiations. 4537 /// 4538 /// This vector is treated as a stack. As one template instantiation 4539 /// requires another template instantiation, additional 4540 /// instantiations are pushed onto the stack up to a 4541 /// user-configurable limit LangOptions::InstantiationDepth. 4542 llvm::SmallVector<ActiveTemplateInstantiation, 16> 4543 ActiveTemplateInstantiations; 4544 4545 /// \brief Whether we are in a SFINAE context that is not associated with 4546 /// template instantiation. 4547 /// 4548 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4549 /// of a template instantiation or template argument deduction. 4550 bool InNonInstantiationSFINAEContext; 4551 4552 /// \brief The number of ActiveTemplateInstantiation entries in 4553 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4554 /// therefore, should not be counted as part of the instantiation depth. 4555 unsigned NonInstantiationEntries; 4556 4557 /// \brief The last template from which a template instantiation 4558 /// error or warning was produced. 4559 /// 4560 /// This value is used to suppress printing of redundant template 4561 /// instantiation backtraces when there are multiple errors in the 4562 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4563 /// to implement it anywhere else. 4564 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4565 4566 /// \brief The current index into pack expansion arguments that will be 4567 /// used for substitution of parameter packs. 4568 /// 4569 /// The pack expansion index will be -1 to indicate that parameter packs 4570 /// should be instantiated as themselves. Otherwise, the index specifies 4571 /// which argument within the parameter pack will be used for substitution. 4572 int ArgumentPackSubstitutionIndex; 4573 4574 /// \brief RAII object used to change the argument pack substitution index 4575 /// within a \c Sema object. 4576 /// 4577 /// See \c ArgumentPackSubstitutionIndex for more information. 4578 class ArgumentPackSubstitutionIndexRAII { 4579 Sema &Self; 4580 int OldSubstitutionIndex; 4581 4582 public: 4583 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4584 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4585 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4586 } 4587 4588 ~ArgumentPackSubstitutionIndexRAII() { 4589 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4590 } 4591 }; 4592 4593 friend class ArgumentPackSubstitutionRAII; 4594 4595 /// \brief The stack of calls expression undergoing template instantiation. 4596 /// 4597 /// The top of this stack is used by a fixit instantiating unresolved 4598 /// function calls to fix the AST to match the textual change it prints. 4599 llvm::SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4600 4601 /// \brief For each declaration that involved template argument deduction, the 4602 /// set of diagnostics that were suppressed during that template argument 4603 /// deduction. 4604 /// 4605 /// FIXME: Serialize this structure to the AST file. 4606 llvm::DenseMap<Decl *, llvm::SmallVector<PartialDiagnosticAt, 1> > 4607 SuppressedDiagnostics; 4608 4609 /// \brief A stack object to be created when performing template 4610 /// instantiation. 4611 /// 4612 /// Construction of an object of type \c InstantiatingTemplate 4613 /// pushes the current instantiation onto the stack of active 4614 /// instantiations. If the size of this stack exceeds the maximum 4615 /// number of recursive template instantiations, construction 4616 /// produces an error and evaluates true. 4617 /// 4618 /// Destruction of this object will pop the named instantiation off 4619 /// the stack. 4620 struct InstantiatingTemplate { 4621 /// \brief Note that we are instantiating a class template, 4622 /// function template, or a member thereof. 4623 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4624 Decl *Entity, 4625 SourceRange InstantiationRange = SourceRange()); 4626 4627 /// \brief Note that we are instantiating a default argument in a 4628 /// template-id. 4629 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4630 TemplateDecl *Template, 4631 const TemplateArgument *TemplateArgs, 4632 unsigned NumTemplateArgs, 4633 SourceRange InstantiationRange = SourceRange()); 4634 4635 /// \brief Note that we are instantiating a default argument in a 4636 /// template-id. 4637 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4638 FunctionTemplateDecl *FunctionTemplate, 4639 const TemplateArgument *TemplateArgs, 4640 unsigned NumTemplateArgs, 4641 ActiveTemplateInstantiation::InstantiationKind Kind, 4642 sema::TemplateDeductionInfo &DeductionInfo, 4643 SourceRange InstantiationRange = SourceRange()); 4644 4645 /// \brief Note that we are instantiating as part of template 4646 /// argument deduction for a class template partial 4647 /// specialization. 4648 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4649 ClassTemplatePartialSpecializationDecl *PartialSpec, 4650 const TemplateArgument *TemplateArgs, 4651 unsigned NumTemplateArgs, 4652 sema::TemplateDeductionInfo &DeductionInfo, 4653 SourceRange InstantiationRange = SourceRange()); 4654 4655 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4656 ParmVarDecl *Param, 4657 const TemplateArgument *TemplateArgs, 4658 unsigned NumTemplateArgs, 4659 SourceRange InstantiationRange = SourceRange()); 4660 4661 /// \brief Note that we are substituting prior template arguments into a 4662 /// non-type or template template parameter. 4663 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4664 NamedDecl *Template, 4665 NonTypeTemplateParmDecl *Param, 4666 const TemplateArgument *TemplateArgs, 4667 unsigned NumTemplateArgs, 4668 SourceRange InstantiationRange); 4669 4670 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4671 NamedDecl *Template, 4672 TemplateTemplateParmDecl *Param, 4673 const TemplateArgument *TemplateArgs, 4674 unsigned NumTemplateArgs, 4675 SourceRange InstantiationRange); 4676 4677 /// \brief Note that we are checking the default template argument 4678 /// against the template parameter for a given template-id. 4679 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4680 TemplateDecl *Template, 4681 NamedDecl *Param, 4682 const TemplateArgument *TemplateArgs, 4683 unsigned NumTemplateArgs, 4684 SourceRange InstantiationRange); 4685 4686 4687 /// \brief Note that we have finished instantiating this template. 4688 void Clear(); 4689 4690 ~InstantiatingTemplate() { Clear(); } 4691 4692 /// \brief Determines whether we have exceeded the maximum 4693 /// recursive template instantiations. 4694 operator bool() const { return Invalid; } 4695 4696 private: 4697 Sema &SemaRef; 4698 bool Invalid; 4699 bool SavedInNonInstantiationSFINAEContext; 4700 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4701 SourceRange InstantiationRange); 4702 4703 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4704 4705 InstantiatingTemplate& 4706 operator=(const InstantiatingTemplate&); // not implemented 4707 }; 4708 4709 void PrintInstantiationStack(); 4710 4711 /// \brief Determines whether we are currently in a context where 4712 /// template argument substitution failures are not considered 4713 /// errors. 4714 /// 4715 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4716 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4717 /// template-deduction context object, which can be used to capture 4718 /// diagnostics that will be suppressed. 4719 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4720 4721 /// \brief RAII class used to determine whether SFINAE has 4722 /// trapped any errors that occur during template argument 4723 /// deduction.` 4724 class SFINAETrap { 4725 Sema &SemaRef; 4726 unsigned PrevSFINAEErrors; 4727 bool PrevInNonInstantiationSFINAEContext; 4728 bool PrevAccessCheckingSFINAE; 4729 4730 public: 4731 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 4732 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 4733 PrevInNonInstantiationSFINAEContext( 4734 SemaRef.InNonInstantiationSFINAEContext), 4735 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 4736 { 4737 if (!SemaRef.isSFINAEContext()) 4738 SemaRef.InNonInstantiationSFINAEContext = true; 4739 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 4740 } 4741 4742 ~SFINAETrap() { 4743 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 4744 SemaRef.InNonInstantiationSFINAEContext 4745 = PrevInNonInstantiationSFINAEContext; 4746 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 4747 } 4748 4749 /// \brief Determine whether any SFINAE errors have been trapped. 4750 bool hasErrorOccurred() const { 4751 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 4752 } 4753 }; 4754 4755 /// \brief The current instantiation scope used to store local 4756 /// variables. 4757 LocalInstantiationScope *CurrentInstantiationScope; 4758 4759 /// \brief The number of typos corrected by CorrectTypo. 4760 unsigned TyposCorrected; 4761 4762 typedef llvm::DenseMap<IdentifierInfo *, std::pair<llvm::StringRef, bool> > 4763 UnqualifiedTyposCorrectedMap; 4764 4765 /// \brief A cache containing the results of typo correction for unqualified 4766 /// name lookup. 4767 /// 4768 /// The string is the string that we corrected to (which may be empty, if 4769 /// there was no correction), while the boolean will be true when the 4770 /// string represents a keyword. 4771 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 4772 4773 /// \brief Worker object for performing CFG-based warnings. 4774 sema::AnalysisBasedWarnings AnalysisWarnings; 4775 4776 /// \brief An entity for which implicit template instantiation is required. 4777 /// 4778 /// The source location associated with the declaration is the first place in 4779 /// the source code where the declaration was "used". It is not necessarily 4780 /// the point of instantiation (which will be either before or after the 4781 /// namespace-scope declaration that triggered this implicit instantiation), 4782 /// However, it is the location that diagnostics should generally refer to, 4783 /// because users will need to know what code triggered the instantiation. 4784 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 4785 4786 /// \brief The queue of implicit template instantiations that are required 4787 /// but have not yet been performed. 4788 std::deque<PendingImplicitInstantiation> PendingInstantiations; 4789 4790 /// \brief The queue of implicit template instantiations that are required 4791 /// and must be performed within the current local scope. 4792 /// 4793 /// This queue is only used for member functions of local classes in 4794 /// templates, which must be instantiated in the same scope as their 4795 /// enclosing function, so that they can reference function-local 4796 /// types, static variables, enumerators, etc. 4797 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 4798 4799 void PerformPendingInstantiations(bool LocalOnly = false); 4800 4801 TypeSourceInfo *SubstType(TypeSourceInfo *T, 4802 const MultiLevelTemplateArgumentList &TemplateArgs, 4803 SourceLocation Loc, DeclarationName Entity); 4804 4805 QualType SubstType(QualType T, 4806 const MultiLevelTemplateArgumentList &TemplateArgs, 4807 SourceLocation Loc, DeclarationName Entity); 4808 4809 TypeSourceInfo *SubstType(TypeLoc TL, 4810 const MultiLevelTemplateArgumentList &TemplateArgs, 4811 SourceLocation Loc, DeclarationName Entity); 4812 4813 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 4814 const MultiLevelTemplateArgumentList &TemplateArgs, 4815 SourceLocation Loc, 4816 DeclarationName Entity); 4817 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 4818 const MultiLevelTemplateArgumentList &TemplateArgs, 4819 int indexAdjustment, 4820 llvm::Optional<unsigned> NumExpansions); 4821 bool SubstParmTypes(SourceLocation Loc, 4822 ParmVarDecl **Params, unsigned NumParams, 4823 const MultiLevelTemplateArgumentList &TemplateArgs, 4824 llvm::SmallVectorImpl<QualType> &ParamTypes, 4825 llvm::SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 4826 ExprResult SubstExpr(Expr *E, 4827 const MultiLevelTemplateArgumentList &TemplateArgs); 4828 4829 /// \brief Substitute the given template arguments into a list of 4830 /// expressions, expanding pack expansions if required. 4831 /// 4832 /// \param Exprs The list of expressions to substitute into. 4833 /// 4834 /// \param NumExprs The number of expressions in \p Exprs. 4835 /// 4836 /// \param IsCall Whether this is some form of call, in which case 4837 /// default arguments will be dropped. 4838 /// 4839 /// \param TemplateArgs The set of template arguments to substitute. 4840 /// 4841 /// \param Outputs Will receive all of the substituted arguments. 4842 /// 4843 /// \returns true if an error occurred, false otherwise. 4844 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 4845 const MultiLevelTemplateArgumentList &TemplateArgs, 4846 llvm::SmallVectorImpl<Expr *> &Outputs); 4847 4848 StmtResult SubstStmt(Stmt *S, 4849 const MultiLevelTemplateArgumentList &TemplateArgs); 4850 4851 Decl *SubstDecl(Decl *D, DeclContext *Owner, 4852 const MultiLevelTemplateArgumentList &TemplateArgs); 4853 4854 bool 4855 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 4856 CXXRecordDecl *Pattern, 4857 const MultiLevelTemplateArgumentList &TemplateArgs); 4858 4859 bool 4860 InstantiateClass(SourceLocation PointOfInstantiation, 4861 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 4862 const MultiLevelTemplateArgumentList &TemplateArgs, 4863 TemplateSpecializationKind TSK, 4864 bool Complain = true); 4865 4866 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 4867 Decl *Pattern, Decl *Inst); 4868 4869 bool 4870 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 4871 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4872 TemplateSpecializationKind TSK, 4873 bool Complain = true); 4874 4875 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 4876 CXXRecordDecl *Instantiation, 4877 const MultiLevelTemplateArgumentList &TemplateArgs, 4878 TemplateSpecializationKind TSK); 4879 4880 void InstantiateClassTemplateSpecializationMembers( 4881 SourceLocation PointOfInstantiation, 4882 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4883 TemplateSpecializationKind TSK); 4884 4885 NestedNameSpecifierLoc 4886 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 4887 const MultiLevelTemplateArgumentList &TemplateArgs); 4888 4889 DeclarationNameInfo 4890 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 4891 const MultiLevelTemplateArgumentList &TemplateArgs); 4892 TemplateName 4893 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 4894 SourceLocation Loc, 4895 const MultiLevelTemplateArgumentList &TemplateArgs); 4896 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 4897 TemplateArgumentListInfo &Result, 4898 const MultiLevelTemplateArgumentList &TemplateArgs); 4899 4900 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 4901 FunctionDecl *Function, 4902 bool Recursive = false, 4903 bool DefinitionRequired = false); 4904 void InstantiateStaticDataMemberDefinition( 4905 SourceLocation PointOfInstantiation, 4906 VarDecl *Var, 4907 bool Recursive = false, 4908 bool DefinitionRequired = false); 4909 4910 void InstantiateMemInitializers(CXXConstructorDecl *New, 4911 const CXXConstructorDecl *Tmpl, 4912 const MultiLevelTemplateArgumentList &TemplateArgs); 4913 4914 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 4915 const MultiLevelTemplateArgumentList &TemplateArgs); 4916 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 4917 const MultiLevelTemplateArgumentList &TemplateArgs); 4918 4919 // Objective-C declarations. 4920 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 4921 IdentifierInfo *ClassName, 4922 SourceLocation ClassLoc, 4923 IdentifierInfo *SuperName, 4924 SourceLocation SuperLoc, 4925 Decl * const *ProtoRefs, 4926 unsigned NumProtoRefs, 4927 const SourceLocation *ProtoLocs, 4928 SourceLocation EndProtoLoc, 4929 AttributeList *AttrList); 4930 4931 Decl *ActOnCompatiblityAlias( 4932 SourceLocation AtCompatibilityAliasLoc, 4933 IdentifierInfo *AliasName, SourceLocation AliasLocation, 4934 IdentifierInfo *ClassName, SourceLocation ClassLocation); 4935 4936 bool CheckForwardProtocolDeclarationForCircularDependency( 4937 IdentifierInfo *PName, 4938 SourceLocation &PLoc, SourceLocation PrevLoc, 4939 const ObjCList<ObjCProtocolDecl> &PList); 4940 4941 Decl *ActOnStartProtocolInterface( 4942 SourceLocation AtProtoInterfaceLoc, 4943 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 4944 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 4945 const SourceLocation *ProtoLocs, 4946 SourceLocation EndProtoLoc, 4947 AttributeList *AttrList); 4948 4949 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 4950 IdentifierInfo *ClassName, 4951 SourceLocation ClassLoc, 4952 IdentifierInfo *CategoryName, 4953 SourceLocation CategoryLoc, 4954 Decl * const *ProtoRefs, 4955 unsigned NumProtoRefs, 4956 const SourceLocation *ProtoLocs, 4957 SourceLocation EndProtoLoc); 4958 4959 Decl *ActOnStartClassImplementation( 4960 SourceLocation AtClassImplLoc, 4961 IdentifierInfo *ClassName, SourceLocation ClassLoc, 4962 IdentifierInfo *SuperClassname, 4963 SourceLocation SuperClassLoc); 4964 4965 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 4966 IdentifierInfo *ClassName, 4967 SourceLocation ClassLoc, 4968 IdentifierInfo *CatName, 4969 SourceLocation CatLoc); 4970 4971 Decl *ActOnForwardClassDeclaration(SourceLocation Loc, 4972 IdentifierInfo **IdentList, 4973 SourceLocation *IdentLocs, 4974 unsigned NumElts); 4975 4976 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 4977 const IdentifierLocPair *IdentList, 4978 unsigned NumElts, 4979 AttributeList *attrList); 4980 4981 void FindProtocolDeclaration(bool WarnOnDeclarations, 4982 const IdentifierLocPair *ProtocolId, 4983 unsigned NumProtocols, 4984 llvm::SmallVectorImpl<Decl *> &Protocols); 4985 4986 /// Ensure attributes are consistent with type. 4987 /// \param [in, out] Attributes The attributes to check; they will 4988 /// be modified to be consistent with \arg PropertyTy. 4989 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 4990 SourceLocation Loc, 4991 unsigned &Attributes); 4992 4993 /// Process the specified property declaration and create decls for the 4994 /// setters and getters as needed. 4995 /// \param property The property declaration being processed 4996 /// \param DC The semantic container for the property 4997 /// \param redeclaredProperty Declaration for property if redeclared 4998 /// in class extension. 4999 /// \param lexicalDC Container for redeclaredProperty. 5000 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5001 ObjCContainerDecl *DC, 5002 ObjCPropertyDecl *redeclaredProperty = 0, 5003 ObjCContainerDecl *lexicalDC = 0); 5004 5005 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5006 ObjCPropertyDecl *SuperProperty, 5007 const IdentifierInfo *Name); 5008 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5009 5010 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5011 ObjCMethodDecl *MethodDecl, 5012 bool IsInstance); 5013 5014 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5015 5016 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5017 ObjCInterfaceDecl *ID); 5018 5019 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5020 ObjCProtocolDecl *PDecl); 5021 5022 void ActOnAtEnd(Scope *S, SourceRange AtEnd, Decl *classDecl, 5023 Decl **allMethods = 0, unsigned allNum = 0, 5024 Decl **allProperties = 0, unsigned pNum = 0, 5025 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5026 5027 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5028 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5029 Selector GetterSel, Selector SetterSel, 5030 Decl *ClassCategory, 5031 bool *OverridingProperty, 5032 tok::ObjCKeywordKind MethodImplKind, 5033 DeclContext *lexicalDC = 0); 5034 5035 Decl *ActOnPropertyImplDecl(Scope *S, 5036 SourceLocation AtLoc, 5037 SourceLocation PropertyLoc, 5038 bool ImplKind,Decl *ClassImplDecl, 5039 IdentifierInfo *PropertyId, 5040 IdentifierInfo *PropertyIvar, 5041 SourceLocation PropertyIvarLoc); 5042 5043 enum ObjCSpecialMethodKind { 5044 OSMK_None, 5045 OSMK_Alloc, 5046 OSMK_New, 5047 OSMK_Copy, 5048 OSMK_RetainingInit, 5049 OSMK_NonRetainingInit 5050 }; 5051 5052 struct ObjCArgInfo { 5053 IdentifierInfo *Name; 5054 SourceLocation NameLoc; 5055 // The Type is null if no type was specified, and the DeclSpec is invalid 5056 // in this case. 5057 ParsedType Type; 5058 ObjCDeclSpec DeclSpec; 5059 5060 /// ArgAttrs - Attribute list for this argument. 5061 AttributeList *ArgAttrs; 5062 }; 5063 5064 Decl *ActOnMethodDeclaration( 5065 Scope *S, 5066 SourceLocation BeginLoc, // location of the + or -. 5067 SourceLocation EndLoc, // location of the ; or {. 5068 tok::TokenKind MethodType, 5069 Decl *ClassDecl, ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5070 SourceLocation SelectorStartLoc, Selector Sel, 5071 // optional arguments. The number of types/arguments is obtained 5072 // from the Sel.getNumArgs(). 5073 ObjCArgInfo *ArgInfo, 5074 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5075 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5076 bool isVariadic, bool MethodDefinition); 5077 5078 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5079 // Will search "local" class/category implementations for a method decl. 5080 // Will also search in class's root looking for instance method. 5081 // Returns 0 if no method is found. 5082 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5083 ObjCInterfaceDecl *CDecl); 5084 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5085 ObjCInterfaceDecl *ClassDecl); 5086 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5087 const ObjCObjectPointerType *OPT, 5088 bool IsInstance); 5089 5090 bool inferObjCARCLifetime(ValueDecl *decl); 5091 5092 ExprResult 5093 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5094 Expr *BaseExpr, 5095 DeclarationName MemberName, 5096 SourceLocation MemberLoc, 5097 SourceLocation SuperLoc, QualType SuperType, 5098 bool Super); 5099 5100 ExprResult 5101 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5102 IdentifierInfo &propertyName, 5103 SourceLocation receiverNameLoc, 5104 SourceLocation propertyNameLoc); 5105 5106 ObjCMethodDecl *tryCaptureObjCSelf(); 5107 5108 /// \brief Describes the kind of message expression indicated by a message 5109 /// send that starts with an identifier. 5110 enum ObjCMessageKind { 5111 /// \brief The message is sent to 'super'. 5112 ObjCSuperMessage, 5113 /// \brief The message is an instance message. 5114 ObjCInstanceMessage, 5115 /// \brief The message is a class message, and the identifier is a type 5116 /// name. 5117 ObjCClassMessage 5118 }; 5119 5120 ObjCMessageKind getObjCMessageKind(Scope *S, 5121 IdentifierInfo *Name, 5122 SourceLocation NameLoc, 5123 bool IsSuper, 5124 bool HasTrailingDot, 5125 ParsedType &ReceiverType); 5126 5127 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5128 Selector Sel, 5129 SourceLocation LBracLoc, 5130 SourceLocation SelectorLoc, 5131 SourceLocation RBracLoc, 5132 MultiExprArg Args); 5133 5134 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5135 QualType ReceiverType, 5136 SourceLocation SuperLoc, 5137 Selector Sel, 5138 ObjCMethodDecl *Method, 5139 SourceLocation LBracLoc, 5140 SourceLocation SelectorLoc, 5141 SourceLocation RBracLoc, 5142 MultiExprArg Args); 5143 5144 ExprResult ActOnClassMessage(Scope *S, 5145 ParsedType Receiver, 5146 Selector Sel, 5147 SourceLocation LBracLoc, 5148 SourceLocation SelectorLoc, 5149 SourceLocation RBracLoc, 5150 MultiExprArg Args); 5151 5152 ExprResult BuildInstanceMessage(Expr *Receiver, 5153 QualType ReceiverType, 5154 SourceLocation SuperLoc, 5155 Selector Sel, 5156 ObjCMethodDecl *Method, 5157 SourceLocation LBracLoc, 5158 SourceLocation SelectorLoc, 5159 SourceLocation RBracLoc, 5160 MultiExprArg Args); 5161 5162 ExprResult ActOnInstanceMessage(Scope *S, 5163 Expr *Receiver, 5164 Selector Sel, 5165 SourceLocation LBracLoc, 5166 SourceLocation SelectorLoc, 5167 SourceLocation RBracLoc, 5168 MultiExprArg Args); 5169 5170 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5171 ObjCBridgeCastKind Kind, 5172 SourceLocation BridgeKeywordLoc, 5173 TypeSourceInfo *TSInfo, 5174 Expr *SubExpr); 5175 5176 ExprResult ActOnObjCBridgedCast(Scope *S, 5177 SourceLocation LParenLoc, 5178 ObjCBridgeCastKind Kind, 5179 SourceLocation BridgeKeywordLoc, 5180 ParsedType Type, 5181 SourceLocation RParenLoc, 5182 Expr *SubExpr); 5183 5184 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5185 5186 /// \brief Check whether the given new method is a valid override of the 5187 /// given overridden method, and set any properties that should be inherited. 5188 /// 5189 /// \returns True if an error occurred. 5190 bool CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5191 const ObjCMethodDecl *Overridden, 5192 bool IsImplementation); 5193 5194 /// \brief Check whether the given method overrides any methods in its class, 5195 /// calling \c CheckObjCMethodOverride for each overridden method. 5196 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5197 5198 enum PragmaOptionsAlignKind { 5199 POAK_Native, // #pragma options align=native 5200 POAK_Natural, // #pragma options align=natural 5201 POAK_Packed, // #pragma options align=packed 5202 POAK_Power, // #pragma options align=power 5203 POAK_Mac68k, // #pragma options align=mac68k 5204 POAK_Reset // #pragma options align=reset 5205 }; 5206 5207 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5208 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5209 SourceLocation PragmaLoc, 5210 SourceLocation KindLoc); 5211 5212 enum PragmaPackKind { 5213 PPK_Default, // #pragma pack([n]) 5214 PPK_Show, // #pragma pack(show), only supported by MSVC. 5215 PPK_Push, // #pragma pack(push, [identifier], [n]) 5216 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5217 }; 5218 5219 enum PragmaMSStructKind { 5220 PMSST_OFF, // #pragms ms_struct off 5221 PMSST_ON // #pragms ms_struct on 5222 }; 5223 5224 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5225 void ActOnPragmaPack(PragmaPackKind Kind, 5226 IdentifierInfo *Name, 5227 Expr *Alignment, 5228 SourceLocation PragmaLoc, 5229 SourceLocation LParenLoc, 5230 SourceLocation RParenLoc); 5231 5232 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5233 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5234 5235 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5236 void ActOnPragmaUnused(const Token &Identifier, 5237 Scope *curScope, 5238 SourceLocation PragmaLoc); 5239 5240 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5241 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 5242 SourceLocation PragmaLoc); 5243 5244 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II); 5245 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5246 5247 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5248 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5249 SourceLocation PragmaLoc, 5250 SourceLocation WeakNameLoc); 5251 5252 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5253 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5254 IdentifierInfo* AliasName, 5255 SourceLocation PragmaLoc, 5256 SourceLocation WeakNameLoc, 5257 SourceLocation AliasNameLoc); 5258 5259 /// ActOnPragmaFPContract - Called on well formed 5260 /// #pragma {STDC,OPENCL} FP_CONTRACT 5261 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5262 5263 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5264 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5265 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5266 5267 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5268 void AddMsStructLayoutForRecord(RecordDecl *RD); 5269 5270 /// FreePackedContext - Deallocate and null out PackContext. 5271 void FreePackedContext(); 5272 5273 /// PushNamespaceVisibilityAttr - Note that we've entered a 5274 /// namespace with a visibility attribute. 5275 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 5276 5277 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5278 /// add an appropriate visibility attribute. 5279 void AddPushedVisibilityAttribute(Decl *RD); 5280 5281 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5282 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5283 void PopPragmaVisibility(); 5284 5285 /// FreeVisContext - Deallocate and null out VisContext. 5286 void FreeVisContext(); 5287 5288 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5289 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, Expr *E); 5290 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, TypeSourceInfo *T); 5291 5292 /// CastCategory - Get the correct forwarded implicit cast result category 5293 /// from the inner expression. 5294 ExprValueKind CastCategory(Expr *E); 5295 5296 /// \brief The kind of conversion being performed. 5297 enum CheckedConversionKind { 5298 /// \brief An implicit conversion. 5299 CCK_ImplicitConversion, 5300 /// \brief A C-style cast. 5301 CCK_CStyleCast, 5302 /// \brief A functional-style cast. 5303 CCK_FunctionalCast, 5304 /// \brief A cast other than a C-style cast. 5305 CCK_OtherCast 5306 }; 5307 5308 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5309 /// cast. If there is already an implicit cast, merge into the existing one. 5310 /// If isLvalue, the result of the cast is an lvalue. 5311 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5312 ExprValueKind VK = VK_RValue, 5313 const CXXCastPath *BasePath = 0, 5314 CheckedConversionKind CCK 5315 = CCK_ImplicitConversion); 5316 5317 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5318 /// to the conversion from scalar type ScalarTy to the Boolean type. 5319 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5320 5321 /// IgnoredValueConversions - Given that an expression's result is 5322 /// syntactically ignored, perform any conversions that are 5323 /// required. 5324 ExprResult IgnoredValueConversions(Expr *E); 5325 5326 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5327 // functions and arrays to their respective pointers (C99 6.3.2.1). 5328 ExprResult UsualUnaryConversions(Expr *E); 5329 5330 // DefaultFunctionArrayConversion - converts functions and arrays 5331 // to their respective pointers (C99 6.3.2.1). 5332 ExprResult DefaultFunctionArrayConversion(Expr *E); 5333 5334 // DefaultFunctionArrayLvalueConversion - converts functions and 5335 // arrays to their respective pointers and performs the 5336 // lvalue-to-rvalue conversion. 5337 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5338 5339 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5340 // the operand. This is DefaultFunctionArrayLvalueConversion, 5341 // except that it assumes the operand isn't of function or array 5342 // type. 5343 ExprResult DefaultLvalueConversion(Expr *E); 5344 5345 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5346 // do not have a prototype. Integer promotions are performed on each 5347 // argument, and arguments that have type float are promoted to double. 5348 ExprResult DefaultArgumentPromotion(Expr *E); 5349 5350 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5351 enum VariadicCallType { 5352 VariadicFunction, 5353 VariadicBlock, 5354 VariadicMethod, 5355 VariadicConstructor, 5356 VariadicDoesNotApply 5357 }; 5358 5359 /// GatherArgumentsForCall - Collector argument expressions for various 5360 /// form of call prototypes. 5361 bool GatherArgumentsForCall(SourceLocation CallLoc, 5362 FunctionDecl *FDecl, 5363 const FunctionProtoType *Proto, 5364 unsigned FirstProtoArg, 5365 Expr **Args, unsigned NumArgs, 5366 llvm::SmallVector<Expr *, 8> &AllArgs, 5367 VariadicCallType CallType = VariadicDoesNotApply); 5368 5369 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5370 // will warn if the resulting type is not a POD type. 5371 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5372 FunctionDecl *FDecl); 5373 5374 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5375 // operands and then handles various conversions that are common to binary 5376 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5377 // routine returns the first non-arithmetic type found. The client is 5378 // responsible for emitting appropriate error diagnostics. 5379 QualType UsualArithmeticConversions(ExprResult &lExpr, ExprResult &rExpr, 5380 bool isCompAssign = false); 5381 5382 /// AssignConvertType - All of the 'assignment' semantic checks return this 5383 /// enum to indicate whether the assignment was allowed. These checks are 5384 /// done for simple assignments, as well as initialization, return from 5385 /// function, argument passing, etc. The query is phrased in terms of a 5386 /// source and destination type. 5387 enum AssignConvertType { 5388 /// Compatible - the types are compatible according to the standard. 5389 Compatible, 5390 5391 /// PointerToInt - The assignment converts a pointer to an int, which we 5392 /// accept as an extension. 5393 PointerToInt, 5394 5395 /// IntToPointer - The assignment converts an int to a pointer, which we 5396 /// accept as an extension. 5397 IntToPointer, 5398 5399 /// FunctionVoidPointer - The assignment is between a function pointer and 5400 /// void*, which the standard doesn't allow, but we accept as an extension. 5401 FunctionVoidPointer, 5402 5403 /// IncompatiblePointer - The assignment is between two pointers types that 5404 /// are not compatible, but we accept them as an extension. 5405 IncompatiblePointer, 5406 5407 /// IncompatiblePointer - The assignment is between two pointers types which 5408 /// point to integers which have a different sign, but are otherwise identical. 5409 /// This is a subset of the above, but broken out because it's by far the most 5410 /// common case of incompatible pointers. 5411 IncompatiblePointerSign, 5412 5413 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5414 /// c/v/r qualifiers, which we accept as an extension. 5415 CompatiblePointerDiscardsQualifiers, 5416 5417 /// IncompatiblePointerDiscardsQualifiers - The assignment 5418 /// discards qualifiers that we don't permit to be discarded, 5419 /// like address spaces. 5420 IncompatiblePointerDiscardsQualifiers, 5421 5422 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5423 /// nested pointer types, and the qualifiers other than the first two 5424 /// levels differ e.g. char ** -> const char **, but we accept them as an 5425 /// extension. 5426 IncompatibleNestedPointerQualifiers, 5427 5428 /// IncompatibleVectors - The assignment is between two vector types that 5429 /// have the same size, which we accept as an extension. 5430 IncompatibleVectors, 5431 5432 /// IntToBlockPointer - The assignment converts an int to a block 5433 /// pointer. We disallow this. 5434 IntToBlockPointer, 5435 5436 /// IncompatibleBlockPointer - The assignment is between two block 5437 /// pointers types that are not compatible. 5438 IncompatibleBlockPointer, 5439 5440 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5441 /// id type and something else (that is incompatible with it). For example, 5442 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5443 IncompatibleObjCQualifiedId, 5444 5445 /// Incompatible - We reject this conversion outright, it is invalid to 5446 /// represent it in the AST. 5447 Incompatible 5448 }; 5449 5450 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5451 /// assignment conversion type specified by ConvTy. This returns true if the 5452 /// conversion was invalid or false if the conversion was accepted. 5453 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5454 SourceLocation Loc, 5455 QualType DstType, QualType SrcType, 5456 Expr *SrcExpr, AssignmentAction Action, 5457 bool *Complained = 0); 5458 5459 /// CheckAssignmentConstraints - Perform type checking for assignment, 5460 /// argument passing, variable initialization, and function return values. 5461 /// C99 6.5.16. 5462 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5463 QualType lhs, QualType rhs); 5464 5465 /// Check assignment constraints and prepare for a conversion of the 5466 /// RHS to the LHS type. 5467 AssignConvertType CheckAssignmentConstraints(QualType lhs, ExprResult &rhs, 5468 CastKind &Kind); 5469 5470 // CheckSingleAssignmentConstraints - Currently used by 5471 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5472 // this routine performs the default function/array converions. 5473 AssignConvertType CheckSingleAssignmentConstraints(QualType lhs, 5474 ExprResult &rExprRes); 5475 5476 // \brief If the lhs type is a transparent union, check whether we 5477 // can initialize the transparent union with the given expression. 5478 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType lhs, 5479 ExprResult &rExpr); 5480 5481 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5482 5483 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5484 5485 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5486 AssignmentAction Action, 5487 bool AllowExplicit = false); 5488 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5489 AssignmentAction Action, 5490 bool AllowExplicit, 5491 ImplicitConversionSequence& ICS); 5492 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5493 const ImplicitConversionSequence& ICS, 5494 AssignmentAction Action, 5495 CheckedConversionKind CCK 5496 = CCK_ImplicitConversion); 5497 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5498 const StandardConversionSequence& SCS, 5499 AssignmentAction Action, 5500 CheckedConversionKind CCK); 5501 5502 /// the following "Check" methods will return a valid/converted QualType 5503 /// or a null QualType (indicating an error diagnostic was issued). 5504 5505 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5506 QualType InvalidOperands(SourceLocation l, ExprResult &lex, ExprResult &rex); 5507 QualType CheckPointerToMemberOperands( // C++ 5.5 5508 ExprResult &lex, ExprResult &rex, ExprValueKind &VK, 5509 SourceLocation OpLoc, bool isIndirect); 5510 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5511 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign, 5512 bool isDivide); 5513 QualType CheckRemainderOperands( // C99 6.5.5 5514 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 5515 QualType CheckAdditionOperands( // C99 6.5.6 5516 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 5517 QualType CheckSubtractionOperands( // C99 6.5.6 5518 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 5519 QualType CheckShiftOperands( // C99 6.5.7 5520 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 5521 bool isCompAssign = false); 5522 QualType CheckCompareOperands( // C99 6.5.8/9 5523 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 5524 bool isRelational); 5525 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 5526 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 5527 QualType CheckLogicalOperands( // C99 6.5.[13,14] 5528 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc); 5529 // CheckAssignmentOperands is used for both simple and compound assignment. 5530 // For simple assignment, pass both expressions and a null converted type. 5531 // For compound assignment, pass both expressions and the converted type. 5532 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 5533 Expr *lex, ExprResult &rex, SourceLocation OpLoc, QualType convertedType); 5534 5535 void ConvertPropertyForLValue(ExprResult &LHS, ExprResult &RHS, QualType& LHSTy); 5536 ExprResult ConvertPropertyForRValue(Expr *E); 5537 5538 QualType CheckConditionalOperands( // C99 6.5.15 5539 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5540 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5541 QualType CXXCheckConditionalOperands( // C++ 5.16 5542 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5543 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5544 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 5545 bool *NonStandardCompositeType = 0); 5546 QualType FindCompositePointerType(SourceLocation Loc, ExprResult &E1, ExprResult &E2, 5547 bool *NonStandardCompositeType = 0) { 5548 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 5549 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, NonStandardCompositeType); 5550 E1 = Owned(E1Tmp); 5551 E2 = Owned(E2Tmp); 5552 return Composite; 5553 } 5554 5555 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5556 SourceLocation questionLoc); 5557 5558 bool DiagnoseConditionalForNull(Expr *LHS, Expr *RHS, 5559 SourceLocation QuestionLoc); 5560 5561 /// type checking for vector binary operators. 5562 QualType CheckVectorOperands(ExprResult &lex, ExprResult &rex, 5563 SourceLocation Loc, bool isCompAssign); 5564 QualType CheckVectorCompareOperands(ExprResult &lex, ExprResult &rx, 5565 SourceLocation l, bool isRel); 5566 5567 /// type checking declaration initializers (C99 6.7.8) 5568 bool CheckInitList(const InitializedEntity &Entity, 5569 InitListExpr *&InitList, QualType &DeclType); 5570 bool CheckForConstantInitializer(Expr *e, QualType t); 5571 5572 // type checking C++ declaration initializers (C++ [dcl.init]). 5573 5574 /// ReferenceCompareResult - Expresses the result of comparing two 5575 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5576 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5577 enum ReferenceCompareResult { 5578 /// Ref_Incompatible - The two types are incompatible, so direct 5579 /// reference binding is not possible. 5580 Ref_Incompatible = 0, 5581 /// Ref_Related - The two types are reference-related, which means 5582 /// that their unqualified forms (T1 and T2) are either the same 5583 /// or T1 is a base class of T2. 5584 Ref_Related, 5585 /// Ref_Compatible_With_Added_Qualification - The two types are 5586 /// reference-compatible with added qualification, meaning that 5587 /// they are reference-compatible and the qualifiers on T1 (cv1) 5588 /// are greater than the qualifiers on T2 (cv2). 5589 Ref_Compatible_With_Added_Qualification, 5590 /// Ref_Compatible - The two types are reference-compatible and 5591 /// have equivalent qualifiers (cv1 == cv2). 5592 Ref_Compatible 5593 }; 5594 5595 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 5596 QualType T1, QualType T2, 5597 bool &DerivedToBase, 5598 bool &ObjCConversion, 5599 bool &ObjCLifetimeConversion); 5600 5601 /// CheckCastTypes - Check type constraints for casting between types under 5602 /// C semantics, or forward to CXXCheckCStyleCast in C++. 5603 ExprResult CheckCastTypes(SourceLocation CastStartLoc, SourceRange TyRange, 5604 QualType CastTy, Expr *CastExpr, CastKind &Kind, 5605 ExprValueKind &VK, CXXCastPath &BasePath, 5606 bool FunctionalStyle = false); 5607 5608 ExprResult checkUnknownAnyCast(SourceRange TyRange, QualType castType, 5609 Expr *castExpr, CastKind &castKind, 5610 ExprValueKind &valueKind, CXXCastPath &BasePath); 5611 5612 // CheckVectorCast - check type constraints for vectors. 5613 // Since vectors are an extension, there are no C standard reference for this. 5614 // We allow casting between vectors and integer datatypes of the same size. 5615 // returns true if the cast is invalid 5616 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 5617 CastKind &Kind); 5618 5619 // CheckExtVectorCast - check type constraints for extended vectors. 5620 // Since vectors are an extension, there are no C standard reference for this. 5621 // We allow casting between vectors and integer datatypes of the same size, 5622 // or vectors and the element type of that vector. 5623 // returns the cast expr 5624 ExprResult CheckExtVectorCast(SourceRange R, QualType VectorTy, Expr *CastExpr, 5625 CastKind &Kind); 5626 5627 /// CXXCheckCStyleCast - Check constraints of a C-style or function-style 5628 /// cast under C++ semantics. 5629 ExprResult CXXCheckCStyleCast(SourceRange R, QualType CastTy, ExprValueKind &VK, 5630 Expr *CastExpr, CastKind &Kind, 5631 CXXCastPath &BasePath, bool FunctionalStyle); 5632 5633 /// \brief Checks for valid expressions which can be cast to an ObjC 5634 /// pointer without needing a bridge cast. 5635 bool ValidObjCARCNoBridgeCastExpr(Expr *&Exp, QualType castType); 5636 5637 /// \brief Checks for invalid conversions and casts between 5638 /// retainable pointers and other pointer kinds. 5639 void CheckObjCARCConversion(SourceRange castRange, QualType castType, 5640 Expr *&op, CheckedConversionKind CCK); 5641 5642 /// checkRetainCycles - Check whether an Objective-C message send 5643 /// might create an obvious retain cycle. 5644 void checkRetainCycles(ObjCMessageExpr *msg); 5645 void checkRetainCycles(Expr *receiver, Expr *argument); 5646 5647 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 5648 /// to weak/__unsafe_unretained type. 5649 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 5650 5651 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 5652 /// to weak/__unsafe_unretained expression. 5653 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 5654 5655 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 5656 /// \param Method - May be null. 5657 /// \param [out] ReturnType - The return type of the send. 5658 /// \return true iff there were any incompatible types. 5659 bool CheckMessageArgumentTypes(QualType ReceiverType, 5660 Expr **Args, unsigned NumArgs, Selector Sel, 5661 ObjCMethodDecl *Method, bool isClassMessage, 5662 bool isSuperMessage, 5663 SourceLocation lbrac, SourceLocation rbrac, 5664 QualType &ReturnType, ExprValueKind &VK); 5665 5666 /// \brief Determine the result of a message send expression based on 5667 /// the type of the receiver, the method expected to receive the message, 5668 /// and the form of the message send. 5669 QualType getMessageSendResultType(QualType ReceiverType, 5670 ObjCMethodDecl *Method, 5671 bool isClassMessage, bool isSuperMessage); 5672 5673 /// \brief If the given expression involves a message send to a method 5674 /// with a related result type, emit a note describing what happened. 5675 void EmitRelatedResultTypeNote(const Expr *E); 5676 5677 /// CheckBooleanCondition - Diagnose problems involving the use of 5678 /// the given expression as a boolean condition (e.g. in an if 5679 /// statement). Also performs the standard function and array 5680 /// decays, possibly changing the input variable. 5681 /// 5682 /// \param Loc - A location associated with the condition, e.g. the 5683 /// 'if' keyword. 5684 /// \return true iff there were any errors 5685 ExprResult CheckBooleanCondition(Expr *CondExpr, SourceLocation Loc); 5686 5687 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 5688 Expr *SubExpr); 5689 5690 /// DiagnoseAssignmentAsCondition - Given that an expression is 5691 /// being used as a boolean condition, warn if it's an assignment. 5692 void DiagnoseAssignmentAsCondition(Expr *E); 5693 5694 /// \brief Redundant parentheses over an equality comparison can indicate 5695 /// that the user intended an assignment used as condition. 5696 void DiagnoseEqualityWithExtraParens(ParenExpr *parenE); 5697 5698 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 5699 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 5700 5701 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 5702 /// the specified width and sign. If an overflow occurs, detect it and emit 5703 /// the specified diagnostic. 5704 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 5705 unsigned NewWidth, bool NewSign, 5706 SourceLocation Loc, unsigned DiagID); 5707 5708 /// Checks that the Objective-C declaration is declared in the global scope. 5709 /// Emits an error and marks the declaration as invalid if it's not declared 5710 /// in the global scope. 5711 bool CheckObjCDeclScope(Decl *D); 5712 5713 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 5714 /// and reports the appropriate diagnostics. Returns false on success. 5715 /// Can optionally return the value of the expression. 5716 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 5717 5718 /// VerifyBitField - verifies that a bit field expression is an ICE and has 5719 /// the correct width, and that the field type is valid. 5720 /// Returns false on success. 5721 /// Can optionally return whether the bit-field is of width 0 5722 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 5723 QualType FieldTy, const Expr *BitWidth, 5724 bool *ZeroWidth = 0); 5725 5726 /// \name Code completion 5727 //@{ 5728 /// \brief Describes the context in which code completion occurs. 5729 enum ParserCompletionContext { 5730 /// \brief Code completion occurs at top-level or namespace context. 5731 PCC_Namespace, 5732 /// \brief Code completion occurs within a class, struct, or union. 5733 PCC_Class, 5734 /// \brief Code completion occurs within an Objective-C interface, protocol, 5735 /// or category. 5736 PCC_ObjCInterface, 5737 /// \brief Code completion occurs within an Objective-C implementation or 5738 /// category implementation 5739 PCC_ObjCImplementation, 5740 /// \brief Code completion occurs within the list of instance variables 5741 /// in an Objective-C interface, protocol, category, or implementation. 5742 PCC_ObjCInstanceVariableList, 5743 /// \brief Code completion occurs following one or more template 5744 /// headers. 5745 PCC_Template, 5746 /// \brief Code completion occurs following one or more template 5747 /// headers within a class. 5748 PCC_MemberTemplate, 5749 /// \brief Code completion occurs within an expression. 5750 PCC_Expression, 5751 /// \brief Code completion occurs within a statement, which may 5752 /// also be an expression or a declaration. 5753 PCC_Statement, 5754 /// \brief Code completion occurs at the beginning of the 5755 /// initialization statement (or expression) in a for loop. 5756 PCC_ForInit, 5757 /// \brief Code completion occurs within the condition of an if, 5758 /// while, switch, or for statement. 5759 PCC_Condition, 5760 /// \brief Code completion occurs within the body of a function on a 5761 /// recovery path, where we do not have a specific handle on our position 5762 /// in the grammar. 5763 PCC_RecoveryInFunction, 5764 /// \brief Code completion occurs where only a type is permitted. 5765 PCC_Type, 5766 /// \brief Code completion occurs in a parenthesized expression, which 5767 /// might also be a type cast. 5768 PCC_ParenthesizedExpression, 5769 /// \brief Code completion occurs within a sequence of declaration 5770 /// specifiers within a function, method, or block. 5771 PCC_LocalDeclarationSpecifiers 5772 }; 5773 5774 void CodeCompleteOrdinaryName(Scope *S, 5775 ParserCompletionContext CompletionContext); 5776 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 5777 bool AllowNonIdentifiers, 5778 bool AllowNestedNameSpecifiers); 5779 5780 struct CodeCompleteExpressionData; 5781 void CodeCompleteExpression(Scope *S, 5782 const CodeCompleteExpressionData &Data); 5783 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 5784 SourceLocation OpLoc, 5785 bool IsArrow); 5786 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 5787 void CodeCompleteTag(Scope *S, unsigned TagSpec); 5788 void CodeCompleteTypeQualifiers(DeclSpec &DS); 5789 void CodeCompleteCase(Scope *S); 5790 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 5791 void CodeCompleteInitializer(Scope *S, Decl *D); 5792 void CodeCompleteReturn(Scope *S); 5793 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 5794 5795 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 5796 bool EnteringContext); 5797 void CodeCompleteUsing(Scope *S); 5798 void CodeCompleteUsingDirective(Scope *S); 5799 void CodeCompleteNamespaceDecl(Scope *S); 5800 void CodeCompleteNamespaceAliasDecl(Scope *S); 5801 void CodeCompleteOperatorName(Scope *S); 5802 void CodeCompleteConstructorInitializer(Decl *Constructor, 5803 CXXCtorInitializer** Initializers, 5804 unsigned NumInitializers); 5805 5806 void CodeCompleteObjCAtDirective(Scope *S, Decl *ObjCImpDecl, 5807 bool InInterface); 5808 void CodeCompleteObjCAtVisibility(Scope *S); 5809 void CodeCompleteObjCAtStatement(Scope *S); 5810 void CodeCompleteObjCAtExpression(Scope *S); 5811 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 5812 void CodeCompleteObjCPropertyGetter(Scope *S, Decl *ClassDecl); 5813 void CodeCompleteObjCPropertySetter(Scope *S, Decl *ClassDecl); 5814 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 5815 bool IsParameter); 5816 void CodeCompleteObjCMessageReceiver(Scope *S); 5817 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 5818 IdentifierInfo **SelIdents, 5819 unsigned NumSelIdents, 5820 bool AtArgumentExpression); 5821 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 5822 IdentifierInfo **SelIdents, 5823 unsigned NumSelIdents, 5824 bool AtArgumentExpression, 5825 bool IsSuper = false); 5826 void CodeCompleteObjCInstanceMessage(Scope *S, ExprTy *Receiver, 5827 IdentifierInfo **SelIdents, 5828 unsigned NumSelIdents, 5829 bool AtArgumentExpression, 5830 ObjCInterfaceDecl *Super = 0); 5831 void CodeCompleteObjCForCollection(Scope *S, 5832 DeclGroupPtrTy IterationVar); 5833 void CodeCompleteObjCSelector(Scope *S, 5834 IdentifierInfo **SelIdents, 5835 unsigned NumSelIdents); 5836 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 5837 unsigned NumProtocols); 5838 void CodeCompleteObjCProtocolDecl(Scope *S); 5839 void CodeCompleteObjCInterfaceDecl(Scope *S); 5840 void CodeCompleteObjCSuperclass(Scope *S, 5841 IdentifierInfo *ClassName, 5842 SourceLocation ClassNameLoc); 5843 void CodeCompleteObjCImplementationDecl(Scope *S); 5844 void CodeCompleteObjCInterfaceCategory(Scope *S, 5845 IdentifierInfo *ClassName, 5846 SourceLocation ClassNameLoc); 5847 void CodeCompleteObjCImplementationCategory(Scope *S, 5848 IdentifierInfo *ClassName, 5849 SourceLocation ClassNameLoc); 5850 void CodeCompleteObjCPropertyDefinition(Scope *S, Decl *ObjCImpDecl); 5851 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 5852 IdentifierInfo *PropertyName, 5853 Decl *ObjCImpDecl); 5854 void CodeCompleteObjCMethodDecl(Scope *S, 5855 bool IsInstanceMethod, 5856 ParsedType ReturnType, 5857 Decl *IDecl); 5858 void CodeCompleteObjCMethodDeclSelector(Scope *S, 5859 bool IsInstanceMethod, 5860 bool AtParameterName, 5861 ParsedType ReturnType, 5862 IdentifierInfo **SelIdents, 5863 unsigned NumSelIdents); 5864 void CodeCompletePreprocessorDirective(bool InConditional); 5865 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 5866 void CodeCompletePreprocessorMacroName(bool IsDefinition); 5867 void CodeCompletePreprocessorExpression(); 5868 void CodeCompletePreprocessorMacroArgument(Scope *S, 5869 IdentifierInfo *Macro, 5870 MacroInfo *MacroInfo, 5871 unsigned Argument); 5872 void CodeCompleteNaturalLanguage(); 5873 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 5874 llvm::SmallVectorImpl<CodeCompletionResult> &Results); 5875 //@} 5876 5877 void PrintStats() const {} 5878 5879 //===--------------------------------------------------------------------===// 5880 // Extra semantic analysis beyond the C type system 5881 5882public: 5883 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 5884 unsigned ByteNo) const; 5885 5886private: 5887 void CheckArrayAccess(const Expr *E); 5888 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 5889 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 5890 5891 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 5892 bool CheckObjCString(Expr *Arg); 5893 5894 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5895 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5896 5897 bool SemaBuiltinVAStart(CallExpr *TheCall); 5898 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 5899 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 5900 5901public: 5902 // Used by C++ template instantiation. 5903 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 5904 5905private: 5906 bool SemaBuiltinPrefetch(CallExpr *TheCall); 5907 bool SemaBuiltinObjectSize(CallExpr *TheCall); 5908 bool SemaBuiltinLongjmp(CallExpr *TheCall); 5909 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 5910 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 5911 llvm::APSInt &Result); 5912 5913 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 5914 bool HasVAListArg, unsigned format_idx, 5915 unsigned firstDataArg, bool isPrintf); 5916 5917 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 5918 const CallExpr *TheCall, bool HasVAListArg, 5919 unsigned format_idx, unsigned firstDataArg, 5920 bool isPrintf); 5921 5922 void CheckNonNullArguments(const NonNullAttr *NonNull, 5923 const Expr * const *ExprArgs, 5924 SourceLocation CallSiteLoc); 5925 5926 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 5927 unsigned format_idx, unsigned firstDataArg, 5928 bool isPrintf); 5929 5930 /// \brief Enumeration used to describe which of the memory setting or copying 5931 /// functions is being checked by \c CheckMemsetcpymoveArguments(). 5932 enum CheckedMemoryFunction { 5933 CMF_Memset, 5934 CMF_Memcpy, 5935 CMF_Memmove 5936 }; 5937 5938 void CheckMemsetcpymoveArguments(const CallExpr *Call, 5939 CheckedMemoryFunction CMF, 5940 IdentifierInfo *FnName); 5941 5942 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 5943 SourceLocation ReturnLoc); 5944 void CheckFloatComparison(SourceLocation loc, Expr* lex, Expr* rex); 5945 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 5946 5947 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 5948 Expr *Init); 5949 5950 /// \brief The parser's current scope. 5951 /// 5952 /// The parser maintains this state here. 5953 Scope *CurScope; 5954 5955protected: 5956 friend class Parser; 5957 friend class InitializationSequence; 5958 5959public: 5960 /// \brief Retrieve the parser's current scope. 5961 /// 5962 /// This routine must only be used when it is certain that semantic analysis 5963 /// and the parser are in precisely the same context, which is not the case 5964 /// when, e.g., we are performing any kind of template instantiation. 5965 /// Therefore, the only safe places to use this scope are in the parser 5966 /// itself and in routines directly invoked from the parser and *never* from 5967 /// template substitution or instantiation. 5968 Scope *getCurScope() const { return CurScope; } 5969}; 5970 5971/// \brief RAII object that enters a new expression evaluation context. 5972class EnterExpressionEvaluationContext { 5973 Sema &Actions; 5974 5975public: 5976 EnterExpressionEvaluationContext(Sema &Actions, 5977 Sema::ExpressionEvaluationContext NewContext) 5978 : Actions(Actions) { 5979 Actions.PushExpressionEvaluationContext(NewContext); 5980 } 5981 5982 ~EnterExpressionEvaluationContext() { 5983 Actions.PopExpressionEvaluationContext(); 5984 } 5985}; 5986 5987} // end namespace clang 5988 5989#endif 5990