Sema.h revision 0a85183be6930571f3af8e5a976d24c3f95e5b25
1//===--- Sema.h - Semantic Analysis & AST Building --------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Sema class, which performs semantic analysis and 11// builds ASTs. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef LLVM_CLANG_SEMA_SEMA_H 16#define LLVM_CLANG_SEMA_SEMA_H 17 18#include "clang/Sema/Ownership.h" 19#include "clang/Sema/AnalysisBasedWarnings.h" 20#include "clang/Sema/IdentifierResolver.h" 21#include "clang/Sema/ObjCMethodList.h" 22#include "clang/Sema/DeclSpec.h" 23#include "clang/Sema/LocInfoType.h" 24#include "clang/Sema/TypoCorrection.h" 25#include "clang/AST/Expr.h" 26#include "clang/AST/DeclarationName.h" 27#include "clang/AST/ExternalASTSource.h" 28#include "clang/AST/TypeLoc.h" 29#include "clang/Basic/Specifiers.h" 30#include "clang/Basic/TemplateKinds.h" 31#include "clang/Basic/TypeTraits.h" 32#include "clang/Basic/ExpressionTraits.h" 33#include "llvm/ADT/OwningPtr.h" 34#include "llvm/ADT/SmallPtrSet.h" 35#include "llvm/ADT/SmallVector.h" 36#include <deque> 37#include <string> 38 39namespace llvm { 40 class APSInt; 41 template <typename ValueT> struct DenseMapInfo; 42 template <typename ValueT, typename ValueInfoT> class DenseSet; 43} 44 45namespace clang { 46 class ADLResult; 47 class ASTConsumer; 48 class ASTContext; 49 class ASTMutationListener; 50 class ASTReader; 51 class ASTWriter; 52 class ArrayType; 53 class AttributeList; 54 class BlockDecl; 55 class CXXBasePath; 56 class CXXBasePaths; 57 typedef llvm::SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 58 class CXXConstructorDecl; 59 class CXXConversionDecl; 60 class CXXDestructorDecl; 61 class CXXFieldCollector; 62 class CXXMemberCallExpr; 63 class CXXMethodDecl; 64 class CXXScopeSpec; 65 class CXXTemporary; 66 class CXXTryStmt; 67 class CallExpr; 68 class ClassTemplateDecl; 69 class ClassTemplatePartialSpecializationDecl; 70 class ClassTemplateSpecializationDecl; 71 class CodeCompleteConsumer; 72 class CodeCompletionAllocator; 73 class CodeCompletionResult; 74 class Decl; 75 class DeclAccessPair; 76 class DeclContext; 77 class DeclRefExpr; 78 class DeclaratorDecl; 79 class DeducedTemplateArgument; 80 class DependentDiagnostic; 81 class DesignatedInitExpr; 82 class Designation; 83 class EnumConstantDecl; 84 class Expr; 85 class ExtVectorType; 86 class ExternalSemaSource; 87 class FormatAttr; 88 class FriendDecl; 89 class FunctionDecl; 90 class FunctionProtoType; 91 class FunctionTemplateDecl; 92 class ImplicitConversionSequence; 93 class InitListExpr; 94 class InitializationKind; 95 class InitializationSequence; 96 class InitializedEntity; 97 class IntegerLiteral; 98 class LabelStmt; 99 class LangOptions; 100 class LocalInstantiationScope; 101 class LookupResult; 102 class MacroInfo; 103 class MultiLevelTemplateArgumentList; 104 class NamedDecl; 105 class NonNullAttr; 106 class ObjCCategoryDecl; 107 class ObjCCategoryImplDecl; 108 class ObjCCompatibleAliasDecl; 109 class ObjCContainerDecl; 110 class ObjCImplDecl; 111 class ObjCImplementationDecl; 112 class ObjCInterfaceDecl; 113 class ObjCIvarDecl; 114 template <class T> class ObjCList; 115 class ObjCMessageExpr; 116 class ObjCMethodDecl; 117 class ObjCPropertyDecl; 118 class ObjCProtocolDecl; 119 class OverloadCandidateSet; 120 class OverloadExpr; 121 class ParenListExpr; 122 class ParmVarDecl; 123 class Preprocessor; 124 class PseudoDestructorTypeStorage; 125 class QualType; 126 class StandardConversionSequence; 127 class Stmt; 128 class StringLiteral; 129 class SwitchStmt; 130 class TargetAttributesSema; 131 class TemplateArgument; 132 class TemplateArgumentList; 133 class TemplateArgumentLoc; 134 class TemplateDecl; 135 class TemplateParameterList; 136 class TemplatePartialOrderingContext; 137 class TemplateTemplateParmDecl; 138 class Token; 139 class TypeAliasDecl; 140 class TypedefDecl; 141 class TypedefNameDecl; 142 class TypeLoc; 143 class UnqualifiedId; 144 class UnresolvedLookupExpr; 145 class UnresolvedMemberExpr; 146 class UnresolvedSetImpl; 147 class UnresolvedSetIterator; 148 class UsingDecl; 149 class UsingShadowDecl; 150 class ValueDecl; 151 class VarDecl; 152 class VisibilityAttr; 153 class VisibleDeclConsumer; 154 class IndirectFieldDecl; 155 156namespace sema { 157 class AccessedEntity; 158 class BlockScopeInfo; 159 class DelayedDiagnostic; 160 class FunctionScopeInfo; 161 class TemplateDeductionInfo; 162} 163 164// FIXME: No way to easily map from TemplateTypeParmTypes to 165// TemplateTypeParmDecls, so we have this horrible PointerUnion. 166typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 167 SourceLocation> UnexpandedParameterPack; 168 169/// Sema - This implements semantic analysis and AST building for C. 170class Sema { 171 Sema(const Sema&); // DO NOT IMPLEMENT 172 void operator=(const Sema&); // DO NOT IMPLEMENT 173 mutable const TargetAttributesSema* TheTargetAttributesSema; 174public: 175 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 176 typedef OpaquePtr<TemplateName> TemplateTy; 177 typedef OpaquePtr<QualType> TypeTy; 178 typedef Attr AttrTy; 179 typedef CXXBaseSpecifier BaseTy; 180 typedef CXXCtorInitializer MemInitTy; 181 typedef Expr ExprTy; 182 typedef Stmt StmtTy; 183 typedef TemplateParameterList TemplateParamsTy; 184 typedef NestedNameSpecifier CXXScopeTy; 185 186 OpenCLOptions OpenCLFeatures; 187 FPOptions FPFeatures; 188 189 const LangOptions &LangOpts; 190 Preprocessor &PP; 191 ASTContext &Context; 192 ASTConsumer &Consumer; 193 Diagnostic &Diags; 194 SourceManager &SourceMgr; 195 196 /// \brief Source of additional semantic information. 197 ExternalSemaSource *ExternalSource; 198 199 /// \brief Code-completion consumer. 200 CodeCompleteConsumer *CodeCompleter; 201 202 /// CurContext - This is the current declaration context of parsing. 203 DeclContext *CurContext; 204 205 /// VAListTagName - The declaration name corresponding to __va_list_tag. 206 /// This is used as part of a hack to omit that class from ADL results. 207 DeclarationName VAListTagName; 208 209 /// PackContext - Manages the stack for #pragma pack. An alignment 210 /// of 0 indicates default alignment. 211 void *PackContext; // Really a "PragmaPackStack*" 212 213 bool MSStructPragmaOn; // True when #pragma ms_struct on 214 215 /// VisContext - Manages the stack for #pragma GCC visibility. 216 void *VisContext; // Really a "PragmaVisStack*" 217 218 /// ExprNeedsCleanups - True if the current evaluation context 219 /// requires cleanups to be run at its conclusion. 220 bool ExprNeedsCleanups; 221 222 /// \brief Stack containing information about each of the nested 223 /// function, block, and method scopes that are currently active. 224 /// 225 /// This array is never empty. Clients should ignore the first 226 /// element, which is used to cache a single FunctionScopeInfo 227 /// that's used to parse every top-level function. 228 llvm::SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 229 230 /// ExprTemporaries - This is the stack of temporaries that are created by 231 /// the current full expression. 232 llvm::SmallVector<CXXTemporary*, 8> ExprTemporaries; 233 234 /// ExtVectorDecls - This is a list all the extended vector types. This allows 235 /// us to associate a raw vector type with one of the ext_vector type names. 236 /// This is only necessary for issuing pretty diagnostics. 237 llvm::SmallVector<TypedefNameDecl*, 24> ExtVectorDecls; 238 239 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 240 llvm::OwningPtr<CXXFieldCollector> FieldCollector; 241 242 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 243 244 /// PureVirtualClassDiagSet - a set of class declarations which we have 245 /// emitted a list of pure virtual functions. Used to prevent emitting the 246 /// same list more than once. 247 llvm::OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 248 249 /// ParsingInitForAutoVars - a set of declarations with auto types for which 250 /// we are currently parsing the initializer. 251 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 252 253 /// \brief A mapping from external names to the most recent 254 /// locally-scoped external declaration with that name. 255 /// 256 /// This map contains external declarations introduced in local 257 /// scoped, e.g., 258 /// 259 /// \code 260 /// void f() { 261 /// void foo(int, int); 262 /// } 263 /// \endcode 264 /// 265 /// Here, the name "foo" will be associated with the declaration on 266 /// "foo" within f. This name is not visible outside of 267 /// "f". However, we still find it in two cases: 268 /// 269 /// - If we are declaring another external with the name "foo", we 270 /// can find "foo" as a previous declaration, so that the types 271 /// of this external declaration can be checked for 272 /// compatibility. 273 /// 274 /// - If we would implicitly declare "foo" (e.g., due to a call to 275 /// "foo" in C when no prototype or definition is visible), then 276 /// we find this declaration of "foo" and complain that it is 277 /// not visible. 278 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 279 280 /// \brief All the tentative definitions encountered in the TU. 281 llvm::SmallVector<VarDecl *, 2> TentativeDefinitions; 282 283 /// \brief The set of file scoped decls seen so far that have not been used 284 /// and must warn if not used. Only contains the first declaration. 285 llvm::SmallVector<const DeclaratorDecl*, 4> UnusedFileScopedDecls; 286 287 /// \brief All the delegating constructors seen so far in the file, used for 288 /// cycle detection at the end of the TU. 289 llvm::SmallVector<CXXConstructorDecl*, 4> DelegatingCtorDecls; 290 291 /// \brief All the overriding destructors seen during a class definition 292 /// (there could be multiple due to nested classes) that had their exception 293 /// spec checks delayed, plus the overridden destructor. 294 llvm::SmallVector<std::pair<const CXXDestructorDecl*, 295 const CXXDestructorDecl*>, 2> 296 DelayedDestructorExceptionSpecChecks; 297 298 /// \brief Callback to the parser to parse templated functions when needed. 299 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 300 LateTemplateParserCB *LateTemplateParser; 301 void *OpaqueParser; 302 303 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 304 LateTemplateParser = LTP; 305 OpaqueParser = P; 306 } 307 308 class DelayedDiagnostics; 309 310 class ParsingDeclState { 311 unsigned SavedStackSize; 312 friend class Sema::DelayedDiagnostics; 313 }; 314 315 class ProcessingContextState { 316 unsigned SavedParsingDepth; 317 unsigned SavedActiveStackBase; 318 friend class Sema::DelayedDiagnostics; 319 }; 320 321 /// A class which encapsulates the logic for delaying diagnostics 322 /// during parsing and other processing. 323 class DelayedDiagnostics { 324 /// \brief The stack of diagnostics that were delayed due to being 325 /// produced during the parsing of a declaration. 326 sema::DelayedDiagnostic *Stack; 327 328 /// \brief The number of objects on the delayed-diagnostics stack. 329 unsigned StackSize; 330 331 /// \brief The current capacity of the delayed-diagnostics stack. 332 unsigned StackCapacity; 333 334 /// \brief The index of the first "active" delayed diagnostic in 335 /// the stack. When parsing class definitions, we ignore active 336 /// delayed diagnostics from the surrounding context. 337 unsigned ActiveStackBase; 338 339 /// \brief The depth of the declarations we're currently parsing. 340 /// This gets saved and reset whenever we enter a class definition. 341 unsigned ParsingDepth; 342 343 public: 344 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 345 ActiveStackBase(0), ParsingDepth(0) {} 346 347 ~DelayedDiagnostics() { 348 delete[] reinterpret_cast<char*>(Stack); 349 } 350 351 /// Adds a delayed diagnostic. 352 void add(const sema::DelayedDiagnostic &diag); 353 354 /// Determines whether diagnostics should be delayed. 355 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 356 357 /// Observe that we've started parsing a declaration. Access and 358 /// deprecation diagnostics will be delayed; when the declaration 359 /// is completed, all active delayed diagnostics will be evaluated 360 /// in its context, and then active diagnostics stack will be 361 /// popped down to the saved depth. 362 ParsingDeclState pushParsingDecl() { 363 ParsingDepth++; 364 365 ParsingDeclState state; 366 state.SavedStackSize = StackSize; 367 return state; 368 } 369 370 /// Observe that we're completed parsing a declaration. 371 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 372 373 /// Observe that we've started processing a different context, the 374 /// contents of which are semantically separate from the 375 /// declarations it may lexically appear in. This sets aside the 376 /// current stack of active diagnostics and starts afresh. 377 ProcessingContextState pushContext() { 378 assert(StackSize >= ActiveStackBase); 379 380 ProcessingContextState state; 381 state.SavedParsingDepth = ParsingDepth; 382 state.SavedActiveStackBase = ActiveStackBase; 383 384 ActiveStackBase = StackSize; 385 ParsingDepth = 0; 386 387 return state; 388 } 389 390 /// Observe that we've stopped processing a context. This 391 /// restores the previous stack of active diagnostics. 392 void popContext(ProcessingContextState state) { 393 assert(ActiveStackBase == StackSize); 394 assert(ParsingDepth == 0); 395 ActiveStackBase = state.SavedActiveStackBase; 396 ParsingDepth = state.SavedParsingDepth; 397 } 398 } DelayedDiagnostics; 399 400 /// A RAII object to temporarily push a declaration context. 401 class ContextRAII { 402 private: 403 Sema &S; 404 DeclContext *SavedContext; 405 ProcessingContextState SavedContextState; 406 407 public: 408 ContextRAII(Sema &S, DeclContext *ContextToPush) 409 : S(S), SavedContext(S.CurContext), 410 SavedContextState(S.DelayedDiagnostics.pushContext()) 411 { 412 assert(ContextToPush && "pushing null context"); 413 S.CurContext = ContextToPush; 414 } 415 416 void pop() { 417 if (!SavedContext) return; 418 S.CurContext = SavedContext; 419 S.DelayedDiagnostics.popContext(SavedContextState); 420 SavedContext = 0; 421 } 422 423 ~ContextRAII() { 424 pop(); 425 } 426 }; 427 428 /// WeakUndeclaredIdentifiers - Identifiers contained in 429 /// #pragma weak before declared. rare. may alias another 430 /// identifier, declared or undeclared 431 class WeakInfo { 432 IdentifierInfo *alias; // alias (optional) 433 SourceLocation loc; // for diagnostics 434 bool used; // identifier later declared? 435 public: 436 WeakInfo() 437 : alias(0), loc(SourceLocation()), used(false) {} 438 WeakInfo(IdentifierInfo *Alias, SourceLocation Loc) 439 : alias(Alias), loc(Loc), used(false) {} 440 inline IdentifierInfo * getAlias() const { return alias; } 441 inline SourceLocation getLocation() const { return loc; } 442 void setUsed(bool Used=true) { used = Used; } 443 inline bool getUsed() { return used; } 444 bool operator==(WeakInfo RHS) const { 445 return alias == RHS.getAlias() && loc == RHS.getLocation(); 446 } 447 bool operator!=(WeakInfo RHS) const { return !(*this == RHS); } 448 }; 449 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 450 451 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 452 /// #pragma weak during processing of other Decls. 453 /// I couldn't figure out a clean way to generate these in-line, so 454 /// we store them here and handle separately -- which is a hack. 455 /// It would be best to refactor this. 456 llvm::SmallVector<Decl*,2> WeakTopLevelDecl; 457 458 IdentifierResolver IdResolver; 459 460 /// Translation Unit Scope - useful to Objective-C actions that need 461 /// to lookup file scope declarations in the "ordinary" C decl namespace. 462 /// For example, user-defined classes, built-in "id" type, etc. 463 Scope *TUScope; 464 465 /// \brief The C++ "std" namespace, where the standard library resides. 466 LazyDeclPtr StdNamespace; 467 468 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 469 /// standard library. 470 LazyDeclPtr StdBadAlloc; 471 472 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 473 RecordDecl *CXXTypeInfoDecl; 474 475 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 476 RecordDecl *MSVCGuidDecl; 477 478 /// A flag to remember whether the implicit forms of operator new and delete 479 /// have been declared. 480 bool GlobalNewDeleteDeclared; 481 482 /// \brief The set of declarations that have been referenced within 483 /// a potentially evaluated expression. 484 typedef llvm::SmallVector<std::pair<SourceLocation, Decl *>, 10> 485 PotentiallyReferencedDecls; 486 487 /// \brief A set of diagnostics that may be emitted. 488 typedef llvm::SmallVector<std::pair<SourceLocation, PartialDiagnostic>, 10> 489 PotentiallyEmittedDiagnostics; 490 491 /// \brief Describes how the expressions currently being parsed are 492 /// evaluated at run-time, if at all. 493 enum ExpressionEvaluationContext { 494 /// \brief The current expression and its subexpressions occur within an 495 /// unevaluated operand (C++0x [expr]p8), such as a constant expression 496 /// or the subexpression of \c sizeof, where the type or the value of the 497 /// expression may be significant but no code will be generated to evaluate 498 /// the value of the expression at run time. 499 Unevaluated, 500 501 /// \brief The current expression is potentially evaluated at run time, 502 /// which means that code may be generated to evaluate the value of the 503 /// expression at run time. 504 PotentiallyEvaluated, 505 506 /// \brief The current expression may be potentially evaluated or it may 507 /// be unevaluated, but it is impossible to tell from the lexical context. 508 /// This evaluation context is used primary for the operand of the C++ 509 /// \c typeid expression, whose argument is potentially evaluated only when 510 /// it is an lvalue of polymorphic class type (C++ [basic.def.odr]p2). 511 PotentiallyPotentiallyEvaluated, 512 513 /// \brief The current expression is potentially evaluated, but any 514 /// declarations referenced inside that expression are only used if 515 /// in fact the current expression is used. 516 /// 517 /// This value is used when parsing default function arguments, for which 518 /// we would like to provide diagnostics (e.g., passing non-POD arguments 519 /// through varargs) but do not want to mark declarations as "referenced" 520 /// until the default argument is used. 521 PotentiallyEvaluatedIfUsed 522 }; 523 524 /// \brief Data structure used to record current or nested 525 /// expression evaluation contexts. 526 struct ExpressionEvaluationContextRecord { 527 /// \brief The expression evaluation context. 528 ExpressionEvaluationContext Context; 529 530 /// \brief Whether the enclosing context needed a cleanup. 531 bool ParentNeedsCleanups; 532 533 /// \brief The number of temporaries that were active when we 534 /// entered this expression evaluation context. 535 unsigned NumTemporaries; 536 537 /// \brief The set of declarations referenced within a 538 /// potentially potentially-evaluated context. 539 /// 540 /// When leaving a potentially potentially-evaluated context, each 541 /// of these elements will be as referenced if the corresponding 542 /// potentially potentially evaluated expression is potentially 543 /// evaluated. 544 PotentiallyReferencedDecls *PotentiallyReferenced; 545 546 /// \brief The set of diagnostics to emit should this potentially 547 /// potentially-evaluated context become evaluated. 548 PotentiallyEmittedDiagnostics *PotentiallyDiagnosed; 549 550 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 551 unsigned NumTemporaries, 552 bool ParentNeedsCleanups) 553 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups), 554 NumTemporaries(NumTemporaries), 555 PotentiallyReferenced(0), PotentiallyDiagnosed(0) { } 556 557 void addReferencedDecl(SourceLocation Loc, Decl *Decl) { 558 if (!PotentiallyReferenced) 559 PotentiallyReferenced = new PotentiallyReferencedDecls; 560 PotentiallyReferenced->push_back(std::make_pair(Loc, Decl)); 561 } 562 563 void addDiagnostic(SourceLocation Loc, const PartialDiagnostic &PD) { 564 if (!PotentiallyDiagnosed) 565 PotentiallyDiagnosed = new PotentiallyEmittedDiagnostics; 566 PotentiallyDiagnosed->push_back(std::make_pair(Loc, PD)); 567 } 568 569 void Destroy() { 570 delete PotentiallyReferenced; 571 delete PotentiallyDiagnosed; 572 PotentiallyReferenced = 0; 573 PotentiallyDiagnosed = 0; 574 } 575 }; 576 577 /// A stack of expression evaluation contexts. 578 llvm::SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 579 580 /// SpecialMemberOverloadResult - The overloading result for a special member 581 /// function. 582 /// 583 /// This is basically a wrapper around PointerIntPair. The lowest bit of the 584 /// integer is used to determine whether we have a parameter qualification 585 /// match, the second-lowest is whether we had success in resolving the 586 /// overload to a unique non-deleted function. 587 /// 588 /// The ConstParamMatch bit represents whether, when looking up a copy 589 /// constructor or assignment operator, we found a potential copy 590 /// constructor/assignment operator whose first parameter is const-qualified. 591 /// This is used for determining parameter types of other objects and is 592 /// utterly meaningless on other types of special members. 593 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 594 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 595 public: 596 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 597 : FastFoldingSetNode(ID) 598 {} 599 600 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 601 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 602 603 bool hasSuccess() const { return Pair.getInt() & 0x1; } 604 void setSuccess(bool B) { 605 Pair.setInt(unsigned(B) | hasConstParamMatch() << 1); 606 } 607 608 bool hasConstParamMatch() const { return Pair.getInt() & 0x2; } 609 void setConstParamMatch(bool B) { 610 Pair.setInt(B << 1 | unsigned(hasSuccess())); 611 } 612 }; 613 614 /// \brief A cache of special member function overload resolution results 615 /// for C++ records. 616 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 617 618 /// \brief Whether the code handled by Sema should be considered a 619 /// complete translation unit or not. 620 /// 621 /// When true (which is generally the case), Sema will perform 622 /// end-of-translation-unit semantic tasks (such as creating 623 /// initializers for tentative definitions in C) once parsing has 624 /// completed. This flag will be false when building PCH files, 625 /// since a PCH file is by definition not a complete translation 626 /// unit. 627 bool CompleteTranslationUnit; 628 629 llvm::BumpPtrAllocator BumpAlloc; 630 631 /// \brief The number of SFINAE diagnostics that have been trapped. 632 unsigned NumSFINAEErrors; 633 634 typedef llvm::DenseMap<ParmVarDecl *, llvm::SmallVector<ParmVarDecl *, 1> > 635 UnparsedDefaultArgInstantiationsMap; 636 637 /// \brief A mapping from parameters with unparsed default arguments to the 638 /// set of instantiations of each parameter. 639 /// 640 /// This mapping is a temporary data structure used when parsing 641 /// nested class templates or nested classes of class templates, 642 /// where we might end up instantiating an inner class before the 643 /// default arguments of its methods have been parsed. 644 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 645 646 // Contains the locations of the beginning of unparsed default 647 // argument locations. 648 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 649 650 /// UndefinedInternals - all the used, undefined objects with 651 /// internal linkage in this translation unit. 652 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 653 654 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 655 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 656 657 /// Method Pool - allows efficient lookup when typechecking messages to "id". 658 /// We need to maintain a list, since selectors can have differing signatures 659 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 660 /// of selectors are "overloaded"). 661 GlobalMethodPool MethodPool; 662 663 /// Method selectors used in a @selector expression. Used for implementation 664 /// of -Wselector. 665 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 666 667 GlobalMethodPool::iterator ReadMethodPool(Selector Sel); 668 669 /// Private Helper predicate to check for 'self'. 670 bool isSelfExpr(Expr *RExpr); 671public: 672 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 673 bool CompleteTranslationUnit = true, 674 CodeCompleteConsumer *CompletionConsumer = 0); 675 ~Sema(); 676 677 /// \brief Perform initialization that occurs after the parser has been 678 /// initialized but before it parses anything. 679 void Initialize(); 680 681 const LangOptions &getLangOptions() const { return LangOpts; } 682 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 683 FPOptions &getFPOptions() { return FPFeatures; } 684 685 Diagnostic &getDiagnostics() const { return Diags; } 686 SourceManager &getSourceManager() const { return SourceMgr; } 687 const TargetAttributesSema &getTargetAttributesSema() const; 688 Preprocessor &getPreprocessor() const { return PP; } 689 ASTContext &getASTContext() const { return Context; } 690 ASTConsumer &getASTConsumer() const { return Consumer; } 691 ASTMutationListener *getASTMutationListener() const; 692 693 /// \brief Helper class that creates diagnostics with optional 694 /// template instantiation stacks. 695 /// 696 /// This class provides a wrapper around the basic DiagnosticBuilder 697 /// class that emits diagnostics. SemaDiagnosticBuilder is 698 /// responsible for emitting the diagnostic (as DiagnosticBuilder 699 /// does) and, if the diagnostic comes from inside a template 700 /// instantiation, printing the template instantiation stack as 701 /// well. 702 class SemaDiagnosticBuilder : public DiagnosticBuilder { 703 Sema &SemaRef; 704 unsigned DiagID; 705 706 public: 707 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 708 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 709 710 explicit SemaDiagnosticBuilder(Sema &SemaRef) 711 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 712 713 ~SemaDiagnosticBuilder(); 714 }; 715 716 /// \brief Emit a diagnostic. 717 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 718 719 /// \brief Emit a partial diagnostic. 720 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 721 722 /// \brief Build a partial diagnostic. 723 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 724 725 bool findMacroSpelling(SourceLocation &loc, llvm::StringRef name); 726 727 ExprResult Owned(Expr* E) { return E; } 728 ExprResult Owned(ExprResult R) { return R; } 729 StmtResult Owned(Stmt* S) { return S; } 730 731 void ActOnEndOfTranslationUnit(); 732 733 void CheckDelegatingCtorCycles(); 734 735 Scope *getScopeForContext(DeclContext *Ctx); 736 737 void PushFunctionScope(); 738 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 739 void PopFunctionOrBlockScope(const sema::AnalysisBasedWarnings::Policy *WP =0, 740 const Decl *D = 0, const BlockExpr *blkExpr = 0); 741 742 sema::FunctionScopeInfo *getCurFunction() const { 743 return FunctionScopes.back(); 744 } 745 746 bool hasAnyUnrecoverableErrorsInThisFunction() const; 747 748 /// \brief Retrieve the current block, if any. 749 sema::BlockScopeInfo *getCurBlock(); 750 751 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 752 llvm::SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 753 754 //===--------------------------------------------------------------------===// 755 // Type Analysis / Processing: SemaType.cpp. 756 // 757 758 QualType adjustParameterType(QualType T); 759 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 760 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 761 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 762 } 763 QualType BuildPointerType(QualType T, 764 SourceLocation Loc, DeclarationName Entity); 765 QualType BuildReferenceType(QualType T, bool LValueRef, 766 SourceLocation Loc, DeclarationName Entity); 767 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 768 Expr *ArraySize, unsigned Quals, 769 SourceRange Brackets, DeclarationName Entity); 770 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 771 SourceLocation AttrLoc); 772 QualType BuildFunctionType(QualType T, 773 QualType *ParamTypes, unsigned NumParamTypes, 774 bool Variadic, unsigned Quals, 775 RefQualifierKind RefQualifier, 776 SourceLocation Loc, DeclarationName Entity, 777 FunctionType::ExtInfo Info); 778 QualType BuildMemberPointerType(QualType T, QualType Class, 779 SourceLocation Loc, 780 DeclarationName Entity); 781 QualType BuildBlockPointerType(QualType T, 782 SourceLocation Loc, DeclarationName Entity); 783 QualType BuildParenType(QualType T); 784 785 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); 786 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); 787 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 788 TypeSourceInfo *ReturnTypeInfo); 789 /// \brief Package the given type and TSI into a ParsedType. 790 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 791 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 792 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 793 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 794 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 795 bool CheckDistantExceptionSpec(QualType T); 796 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 797 bool CheckEquivalentExceptionSpec( 798 const FunctionProtoType *Old, SourceLocation OldLoc, 799 const FunctionProtoType *New, SourceLocation NewLoc); 800 bool CheckEquivalentExceptionSpec( 801 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 802 const FunctionProtoType *Old, SourceLocation OldLoc, 803 const FunctionProtoType *New, SourceLocation NewLoc, 804 bool *MissingExceptionSpecification = 0, 805 bool *MissingEmptyExceptionSpecification = 0, 806 bool AllowNoexceptAllMatchWithNoSpec = false, 807 bool IsOperatorNew = false); 808 bool CheckExceptionSpecSubset( 809 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 810 const FunctionProtoType *Superset, SourceLocation SuperLoc, 811 const FunctionProtoType *Subset, SourceLocation SubLoc); 812 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 813 const FunctionProtoType *Target, SourceLocation TargetLoc, 814 const FunctionProtoType *Source, SourceLocation SourceLoc); 815 816 TypeResult ActOnTypeName(Scope *S, Declarator &D); 817 818 bool RequireCompleteType(SourceLocation Loc, QualType T, 819 const PartialDiagnostic &PD, 820 std::pair<SourceLocation, PartialDiagnostic> Note); 821 bool RequireCompleteType(SourceLocation Loc, QualType T, 822 const PartialDiagnostic &PD); 823 bool RequireCompleteType(SourceLocation Loc, QualType T, 824 unsigned DiagID); 825 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 826 std::pair<SourceLocation, 827 PartialDiagnostic> Note); 828 829 830 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 831 const CXXScopeSpec &SS, QualType T); 832 833 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 834 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 835 QualType BuildUnaryTransformType(QualType BaseType, 836 UnaryTransformType::UTTKind UKind, 837 SourceLocation Loc); 838 839 //===--------------------------------------------------------------------===// 840 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 841 // 842 843 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 844 845 void DiagnoseUseOfUnimplementedSelectors(); 846 847 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 848 Scope *S, CXXScopeSpec *SS = 0, 849 bool isClassName = false, 850 bool HasTrailingDot = false, 851 ParsedType ObjectType = ParsedType(), 852 bool WantNontrivialTypeSourceInfo = false); 853 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 854 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS); 855 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 856 SourceLocation IILoc, 857 Scope *S, 858 CXXScopeSpec *SS, 859 ParsedType &SuggestedType); 860 861 /// \brief Describes the result of the name lookup and resolution performed 862 /// by \c ClassifyName(). 863 enum NameClassificationKind { 864 NC_Unknown, 865 NC_Error, 866 NC_Keyword, 867 NC_Type, 868 NC_Expression, 869 NC_NestedNameSpecifier, 870 NC_TypeTemplate, 871 NC_FunctionTemplate 872 }; 873 874 class NameClassification { 875 NameClassificationKind Kind; 876 ExprResult Expr; 877 TemplateName Template; 878 ParsedType Type; 879 const IdentifierInfo *Keyword; 880 881 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 882 883 public: 884 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 885 886 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 887 888 NameClassification(const IdentifierInfo *Keyword) 889 : Kind(NC_Keyword), Keyword(Keyword) { } 890 891 static NameClassification Error() { 892 return NameClassification(NC_Error); 893 } 894 895 static NameClassification Unknown() { 896 return NameClassification(NC_Unknown); 897 } 898 899 static NameClassification NestedNameSpecifier() { 900 return NameClassification(NC_NestedNameSpecifier); 901 } 902 903 static NameClassification TypeTemplate(TemplateName Name) { 904 NameClassification Result(NC_TypeTemplate); 905 Result.Template = Name; 906 return Result; 907 } 908 909 static NameClassification FunctionTemplate(TemplateName Name) { 910 NameClassification Result(NC_FunctionTemplate); 911 Result.Template = Name; 912 return Result; 913 } 914 915 NameClassificationKind getKind() const { return Kind; } 916 917 ParsedType getType() const { 918 assert(Kind == NC_Type); 919 return Type; 920 } 921 922 ExprResult getExpression() const { 923 assert(Kind == NC_Expression); 924 return Expr; 925 } 926 927 TemplateName getTemplateName() const { 928 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 929 return Template; 930 } 931 932 TemplateNameKind getTemplateNameKind() const { 933 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 934 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 935 } 936}; 937 938 /// \brief Perform name lookup on the given name, classifying it based on 939 /// the results of name lookup and the following token. 940 /// 941 /// This routine is used by the parser to resolve identifiers and help direct 942 /// parsing. When the identifier cannot be found, this routine will attempt 943 /// to correct the typo and classify based on the resulting name. 944 /// 945 /// \param S The scope in which we're performing name lookup. 946 /// 947 /// \param SS The nested-name-specifier that precedes the name. 948 /// 949 /// \param Name The identifier. If typo correction finds an alternative name, 950 /// this pointer parameter will be updated accordingly. 951 /// 952 /// \param NameLoc The location of the identifier. 953 /// 954 /// \param NextToken The token following the identifier. Used to help 955 /// disambiguate the name. 956 NameClassification ClassifyName(Scope *S, 957 CXXScopeSpec &SS, 958 IdentifierInfo *&Name, 959 SourceLocation NameLoc, 960 const Token &NextToken); 961 962 Decl *ActOnDeclarator(Scope *S, Declarator &D, 963 bool IsFunctionDefintion = false); 964 965 Decl *HandleDeclarator(Scope *S, Declarator &D, 966 MultiTemplateParamsArg TemplateParameterLists, 967 bool IsFunctionDefinition); 968 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 969 const LookupResult &Previous, 970 Scope *S); 971 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 972 void DiagnoseFunctionSpecifiers(Declarator& D); 973 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 974 void CheckShadow(Scope *S, VarDecl *D); 975 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 976 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 977 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 978 QualType R, TypeSourceInfo *TInfo, 979 LookupResult &Previous, bool &Redeclaration); 980 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 981 LookupResult &Previous, bool &Redeclaration); 982 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 983 QualType R, TypeSourceInfo *TInfo, 984 LookupResult &Previous, 985 MultiTemplateParamsArg TemplateParamLists, 986 bool &Redeclaration); 987 void CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous, 988 bool &Redeclaration); 989 void CheckCompleteVariableDeclaration(VarDecl *var); 990 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 991 QualType R, TypeSourceInfo *TInfo, 992 LookupResult &Previous, 993 MultiTemplateParamsArg TemplateParamLists, 994 bool IsFunctionDefinition, 995 bool &Redeclaration); 996 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 997 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 998 void CheckFunctionDeclaration(Scope *S, 999 FunctionDecl *NewFD, LookupResult &Previous, 1000 bool IsExplicitSpecialization, 1001 bool &Redeclaration); 1002 void CheckMain(FunctionDecl *FD); 1003 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1004 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1005 SourceLocation Loc, 1006 QualType T); 1007 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1008 SourceLocation NameLoc, IdentifierInfo *Name, 1009 QualType T, TypeSourceInfo *TSInfo, 1010 StorageClass SC, StorageClass SCAsWritten); 1011 void ActOnParamDefaultArgument(Decl *param, 1012 SourceLocation EqualLoc, 1013 Expr *defarg); 1014 void ActOnParamUnparsedDefaultArgument(Decl *param, 1015 SourceLocation EqualLoc, 1016 SourceLocation ArgLoc); 1017 void ActOnParamDefaultArgumentError(Decl *param); 1018 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1019 SourceLocation EqualLoc); 1020 1021 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1022 bool TypeMayContainAuto); 1023 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1024 void ActOnInitializerError(Decl *Dcl); 1025 void ActOnCXXForRangeDecl(Decl *D); 1026 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1027 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1028 void FinalizeDeclaration(Decl *D); 1029 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1030 Decl **Group, 1031 unsigned NumDecls); 1032 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1033 bool TypeMayContainAuto = true); 1034 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1035 SourceLocation LocAfterDecls); 1036 void CheckForFunctionRedefinition(FunctionDecl *FD); 1037 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1038 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1039 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1040 1041 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1042 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1043 1044 /// \brief Diagnose any unused parameters in the given sequence of 1045 /// ParmVarDecl pointers. 1046 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1047 ParmVarDecl * const *End); 1048 1049 /// \brief Diagnose whether the size of parameters or return value of a 1050 /// function or obj-c method definition is pass-by-value and larger than a 1051 /// specified threshold. 1052 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1053 ParmVarDecl * const *End, 1054 QualType ReturnTy, 1055 NamedDecl *D); 1056 1057 void DiagnoseInvalidJumps(Stmt *Body); 1058 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1059 SourceLocation AsmLoc, 1060 SourceLocation RParenLoc); 1061 1062 /// Scope actions. 1063 void ActOnPopScope(SourceLocation Loc, Scope *S); 1064 void ActOnTranslationUnitScope(Scope *S); 1065 1066 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1067 DeclSpec &DS); 1068 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1069 DeclSpec &DS, 1070 MultiTemplateParamsArg TemplateParams); 1071 1072 StmtResult ActOnVlaStmt(const DeclSpec &DS); 1073 1074 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1075 AccessSpecifier AS, 1076 RecordDecl *Record); 1077 1078 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1079 RecordDecl *Record); 1080 1081 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1082 TagTypeKind NewTag, bool isDefinition, 1083 SourceLocation NewTagLoc, 1084 const IdentifierInfo &Name); 1085 1086 enum TagUseKind { 1087 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1088 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1089 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1090 TUK_Friend // Friend declaration: 'friend struct foo;' 1091 }; 1092 1093 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1094 SourceLocation KWLoc, CXXScopeSpec &SS, 1095 IdentifierInfo *Name, SourceLocation NameLoc, 1096 AttributeList *Attr, AccessSpecifier AS, 1097 MultiTemplateParamsArg TemplateParameterLists, 1098 bool &OwnedDecl, bool &IsDependent, bool ScopedEnum, 1099 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1100 1101 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1102 unsigned TagSpec, SourceLocation TagLoc, 1103 CXXScopeSpec &SS, 1104 IdentifierInfo *Name, SourceLocation NameLoc, 1105 AttributeList *Attr, 1106 MultiTemplateParamsArg TempParamLists); 1107 1108 TypeResult ActOnDependentTag(Scope *S, 1109 unsigned TagSpec, 1110 TagUseKind TUK, 1111 const CXXScopeSpec &SS, 1112 IdentifierInfo *Name, 1113 SourceLocation TagLoc, 1114 SourceLocation NameLoc); 1115 1116 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1117 IdentifierInfo *ClassName, 1118 llvm::SmallVectorImpl<Decl *> &Decls); 1119 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1120 Declarator &D, Expr *BitfieldWidth); 1121 1122 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1123 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1124 AccessSpecifier AS); 1125 1126 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1127 TypeSourceInfo *TInfo, 1128 RecordDecl *Record, SourceLocation Loc, 1129 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1130 SourceLocation TSSL, 1131 AccessSpecifier AS, NamedDecl *PrevDecl, 1132 Declarator *D = 0); 1133 1134 enum CXXSpecialMember { 1135 CXXDefaultConstructor, 1136 CXXCopyConstructor, 1137 CXXMoveConstructor, 1138 CXXCopyAssignment, 1139 CXXMoveAssignment, 1140 CXXDestructor, 1141 CXXInvalid 1142 }; 1143 bool CheckNontrivialField(FieldDecl *FD); 1144 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1145 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1146 void ActOnLastBitfield(SourceLocation DeclStart, Decl *IntfDecl, 1147 llvm::SmallVectorImpl<Decl *> &AllIvarDecls); 1148 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, Decl *IntfDecl, 1149 Declarator &D, Expr *BitfieldWidth, 1150 tok::ObjCKeywordKind visibility); 1151 1152 // This is used for both record definitions and ObjC interface declarations. 1153 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1154 Decl **Fields, unsigned NumFields, 1155 SourceLocation LBrac, SourceLocation RBrac, 1156 AttributeList *AttrList); 1157 1158 /// ActOnTagStartDefinition - Invoked when we have entered the 1159 /// scope of a tag's definition (e.g., for an enumeration, class, 1160 /// struct, or union). 1161 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1162 1163 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1164 /// C++ record definition's base-specifiers clause and are starting its 1165 /// member declarations. 1166 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1167 SourceLocation FinalLoc, 1168 SourceLocation LBraceLoc); 1169 1170 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1171 /// the definition of a tag (enumeration, class, struct, or union). 1172 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1173 SourceLocation RBraceLoc); 1174 1175 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1176 /// error parsing the definition of a tag. 1177 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1178 1179 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1180 EnumConstantDecl *LastEnumConst, 1181 SourceLocation IdLoc, 1182 IdentifierInfo *Id, 1183 Expr *val); 1184 1185 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1186 SourceLocation IdLoc, IdentifierInfo *Id, 1187 AttributeList *Attrs, 1188 SourceLocation EqualLoc, Expr *Val); 1189 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1190 SourceLocation RBraceLoc, Decl *EnumDecl, 1191 Decl **Elements, unsigned NumElements, 1192 Scope *S, AttributeList *Attr); 1193 1194 DeclContext *getContainingDC(DeclContext *DC); 1195 1196 /// Set the current declaration context until it gets popped. 1197 void PushDeclContext(Scope *S, DeclContext *DC); 1198 void PopDeclContext(); 1199 1200 /// EnterDeclaratorContext - Used when we must lookup names in the context 1201 /// of a declarator's nested name specifier. 1202 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1203 void ExitDeclaratorContext(Scope *S); 1204 1205 DeclContext *getFunctionLevelDeclContext(); 1206 1207 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1208 /// to the function decl for the function being parsed. If we're currently 1209 /// in a 'block', this returns the containing context. 1210 FunctionDecl *getCurFunctionDecl(); 1211 1212 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1213 /// the method decl for the method being parsed. If we're currently 1214 /// in a 'block', this returns the containing context. 1215 ObjCMethodDecl *getCurMethodDecl(); 1216 1217 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1218 /// or C function we're in, otherwise return null. If we're currently 1219 /// in a 'block', this returns the containing context. 1220 NamedDecl *getCurFunctionOrMethodDecl(); 1221 1222 /// Add this decl to the scope shadowed decl chains. 1223 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1224 1225 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1226 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1227 /// true if 'D' belongs to the given declaration context. 1228 /// 1229 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1230 /// whether the declaration is in scope for the purposes of explicit template 1231 /// instantiation or specialization. The default is false. 1232 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1233 bool ExplicitInstantiationOrSpecialization = false); 1234 1235 /// Finds the scope corresponding to the given decl context, if it 1236 /// happens to be an enclosing scope. Otherwise return NULL. 1237 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1238 1239 /// Subroutines of ActOnDeclarator(). 1240 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1241 TypeSourceInfo *TInfo); 1242 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1243 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1244 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1245 void mergeObjCMethodDecls(ObjCMethodDecl *New, const ObjCMethodDecl *Old); 1246 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1247 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1248 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1249 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1250 1251 // AssignmentAction - This is used by all the assignment diagnostic functions 1252 // to represent what is actually causing the operation 1253 enum AssignmentAction { 1254 AA_Assigning, 1255 AA_Passing, 1256 AA_Returning, 1257 AA_Converting, 1258 AA_Initializing, 1259 AA_Sending, 1260 AA_Casting 1261 }; 1262 1263 /// C++ Overloading. 1264 enum OverloadKind { 1265 /// This is a legitimate overload: the existing declarations are 1266 /// functions or function templates with different signatures. 1267 Ovl_Overload, 1268 1269 /// This is not an overload because the signature exactly matches 1270 /// an existing declaration. 1271 Ovl_Match, 1272 1273 /// This is not an overload because the lookup results contain a 1274 /// non-function. 1275 Ovl_NonFunction 1276 }; 1277 OverloadKind CheckOverload(Scope *S, 1278 FunctionDecl *New, 1279 const LookupResult &OldDecls, 1280 NamedDecl *&OldDecl, 1281 bool IsForUsingDecl); 1282 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1283 1284 /// \brief Checks availability of the function depending on the current 1285 /// function context.Inside an unavailable function,unavailability is ignored. 1286 /// 1287 /// \returns true if \arg FD is unavailable and current context is inside 1288 /// an available function, false otherwise. 1289 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1290 1291 ImplicitConversionSequence 1292 TryImplicitConversion(Expr *From, QualType ToType, 1293 bool SuppressUserConversions, 1294 bool AllowExplicit, 1295 bool InOverloadResolution, 1296 bool CStyle, 1297 bool AllowObjCWritebackConversion); 1298 1299 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1300 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1301 bool IsComplexPromotion(QualType FromType, QualType ToType); 1302 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1303 bool InOverloadResolution, 1304 QualType& ConvertedType, bool &IncompatibleObjC); 1305 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1306 QualType& ConvertedType, bool &IncompatibleObjC); 1307 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1308 QualType &ConvertedType); 1309 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1310 QualType& ConvertedType); 1311 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1312 const FunctionProtoType *NewType); 1313 1314 bool CheckPointerConversion(Expr *From, QualType ToType, 1315 CastKind &Kind, 1316 CXXCastPath& BasePath, 1317 bool IgnoreBaseAccess); 1318 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1319 bool InOverloadResolution, 1320 QualType &ConvertedType); 1321 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1322 CastKind &Kind, 1323 CXXCastPath &BasePath, 1324 bool IgnoreBaseAccess); 1325 bool IsQualificationConversion(QualType FromType, QualType ToType, 1326 bool CStyle, bool &ObjCLifetimeConversion); 1327 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1328 QualType &ResultTy); 1329 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1330 1331 1332 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1333 const VarDecl *NRVOCandidate, 1334 QualType ResultType, 1335 Expr *Value); 1336 1337 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1338 ExprResult Init); 1339 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1340 SourceLocation EqualLoc, 1341 ExprResult Init); 1342 ExprResult PerformObjectArgumentInitialization(Expr *From, 1343 NestedNameSpecifier *Qualifier, 1344 NamedDecl *FoundDecl, 1345 CXXMethodDecl *Method); 1346 1347 ExprResult PerformContextuallyConvertToBool(Expr *From); 1348 ExprResult PerformContextuallyConvertToObjCId(Expr *From); 1349 1350 ExprResult 1351 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1352 const PartialDiagnostic &NotIntDiag, 1353 const PartialDiagnostic &IncompleteDiag, 1354 const PartialDiagnostic &ExplicitConvDiag, 1355 const PartialDiagnostic &ExplicitConvNote, 1356 const PartialDiagnostic &AmbigDiag, 1357 const PartialDiagnostic &AmbigNote, 1358 const PartialDiagnostic &ConvDiag); 1359 1360 ExprResult PerformObjectMemberConversion(Expr *From, 1361 NestedNameSpecifier *Qualifier, 1362 NamedDecl *FoundDecl, 1363 NamedDecl *Member); 1364 1365 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1366 // TODO: make this is a typesafe union. 1367 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1368 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1369 1370 void AddOverloadCandidate(NamedDecl *Function, 1371 DeclAccessPair FoundDecl, 1372 Expr **Args, unsigned NumArgs, 1373 OverloadCandidateSet &CandidateSet); 1374 1375 void AddOverloadCandidate(FunctionDecl *Function, 1376 DeclAccessPair FoundDecl, 1377 Expr **Args, unsigned NumArgs, 1378 OverloadCandidateSet& CandidateSet, 1379 bool SuppressUserConversions = false, 1380 bool PartialOverloading = false); 1381 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1382 Expr **Args, unsigned NumArgs, 1383 OverloadCandidateSet& CandidateSet, 1384 bool SuppressUserConversions = false); 1385 void AddMethodCandidate(DeclAccessPair FoundDecl, 1386 QualType ObjectType, 1387 Expr::Classification ObjectClassification, 1388 Expr **Args, unsigned NumArgs, 1389 OverloadCandidateSet& CandidateSet, 1390 bool SuppressUserConversion = false); 1391 void AddMethodCandidate(CXXMethodDecl *Method, 1392 DeclAccessPair FoundDecl, 1393 CXXRecordDecl *ActingContext, QualType ObjectType, 1394 Expr::Classification ObjectClassification, 1395 Expr **Args, unsigned NumArgs, 1396 OverloadCandidateSet& CandidateSet, 1397 bool SuppressUserConversions = false); 1398 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1399 DeclAccessPair FoundDecl, 1400 CXXRecordDecl *ActingContext, 1401 TemplateArgumentListInfo *ExplicitTemplateArgs, 1402 QualType ObjectType, 1403 Expr::Classification ObjectClassification, 1404 Expr **Args, unsigned NumArgs, 1405 OverloadCandidateSet& CandidateSet, 1406 bool SuppressUserConversions = false); 1407 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1408 DeclAccessPair FoundDecl, 1409 TemplateArgumentListInfo *ExplicitTemplateArgs, 1410 Expr **Args, unsigned NumArgs, 1411 OverloadCandidateSet& CandidateSet, 1412 bool SuppressUserConversions = false); 1413 void AddConversionCandidate(CXXConversionDecl *Conversion, 1414 DeclAccessPair FoundDecl, 1415 CXXRecordDecl *ActingContext, 1416 Expr *From, QualType ToType, 1417 OverloadCandidateSet& CandidateSet); 1418 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1419 DeclAccessPair FoundDecl, 1420 CXXRecordDecl *ActingContext, 1421 Expr *From, QualType ToType, 1422 OverloadCandidateSet &CandidateSet); 1423 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1424 DeclAccessPair FoundDecl, 1425 CXXRecordDecl *ActingContext, 1426 const FunctionProtoType *Proto, 1427 Expr *Object, Expr **Args, unsigned NumArgs, 1428 OverloadCandidateSet& CandidateSet); 1429 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1430 SourceLocation OpLoc, 1431 Expr **Args, unsigned NumArgs, 1432 OverloadCandidateSet& CandidateSet, 1433 SourceRange OpRange = SourceRange()); 1434 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1435 Expr **Args, unsigned NumArgs, 1436 OverloadCandidateSet& CandidateSet, 1437 bool IsAssignmentOperator = false, 1438 unsigned NumContextualBoolArguments = 0); 1439 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1440 SourceLocation OpLoc, 1441 Expr **Args, unsigned NumArgs, 1442 OverloadCandidateSet& CandidateSet); 1443 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1444 bool Operator, 1445 Expr **Args, unsigned NumArgs, 1446 TemplateArgumentListInfo *ExplicitTemplateArgs, 1447 OverloadCandidateSet& CandidateSet, 1448 bool PartialOverloading = false, 1449 bool StdNamespaceIsAssociated = false); 1450 1451 // Emit as a 'note' the specific overload candidate 1452 void NoteOverloadCandidate(FunctionDecl *Fn); 1453 1454 // Emit as a series of 'note's all template and non-templates 1455 // identified by the expression Expr 1456 void NoteAllOverloadCandidates(Expr* E); 1457 1458 // [PossiblyAFunctionType] --> [Return] 1459 // NonFunctionType --> NonFunctionType 1460 // R (A) --> R(A) 1461 // R (*)(A) --> R (A) 1462 // R (&)(A) --> R (A) 1463 // R (S::*)(A) --> R (A) 1464 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1465 1466 FunctionDecl *ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, QualType TargetType, 1467 bool Complain, 1468 DeclAccessPair &Found); 1469 1470 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1471 bool Complain = false, 1472 DeclAccessPair* Found = 0); 1473 1474 ExprResult ResolveAndFixSingleFunctionTemplateSpecialization( 1475 Expr *SrcExpr, bool DoFunctionPointerConverion = false, 1476 bool Complain = false, 1477 const SourceRange& OpRangeForComplaining = SourceRange(), 1478 QualType DestTypeForComplaining = QualType(), 1479 unsigned DiagIDForComplaining = 0); 1480 1481 1482 Expr *FixOverloadedFunctionReference(Expr *E, 1483 DeclAccessPair FoundDecl, 1484 FunctionDecl *Fn); 1485 ExprResult FixOverloadedFunctionReference(ExprResult, 1486 DeclAccessPair FoundDecl, 1487 FunctionDecl *Fn); 1488 1489 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1490 Expr **Args, unsigned NumArgs, 1491 OverloadCandidateSet &CandidateSet, 1492 bool PartialOverloading = false); 1493 1494 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1495 UnresolvedLookupExpr *ULE, 1496 SourceLocation LParenLoc, 1497 Expr **Args, unsigned NumArgs, 1498 SourceLocation RParenLoc, 1499 Expr *ExecConfig); 1500 1501 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1502 unsigned Opc, 1503 const UnresolvedSetImpl &Fns, 1504 Expr *input); 1505 1506 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1507 unsigned Opc, 1508 const UnresolvedSetImpl &Fns, 1509 Expr *LHS, Expr *RHS); 1510 1511 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1512 SourceLocation RLoc, 1513 Expr *Base,Expr *Idx); 1514 1515 ExprResult 1516 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1517 SourceLocation LParenLoc, Expr **Args, 1518 unsigned NumArgs, SourceLocation RParenLoc); 1519 ExprResult 1520 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1521 Expr **Args, unsigned NumArgs, 1522 SourceLocation RParenLoc); 1523 1524 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1525 SourceLocation OpLoc); 1526 1527 /// CheckCallReturnType - Checks that a call expression's return type is 1528 /// complete. Returns true on failure. The location passed in is the location 1529 /// that best represents the call. 1530 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1531 CallExpr *CE, FunctionDecl *FD); 1532 1533 /// Helpers for dealing with blocks and functions. 1534 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1535 bool CheckParameterNames); 1536 void CheckCXXDefaultArguments(FunctionDecl *FD); 1537 void CheckExtraCXXDefaultArguments(Declarator &D); 1538 Scope *getNonFieldDeclScope(Scope *S); 1539 1540 /// \name Name lookup 1541 /// 1542 /// These routines provide name lookup that is used during semantic 1543 /// analysis to resolve the various kinds of names (identifiers, 1544 /// overloaded operator names, constructor names, etc.) into zero or 1545 /// more declarations within a particular scope. The major entry 1546 /// points are LookupName, which performs unqualified name lookup, 1547 /// and LookupQualifiedName, which performs qualified name lookup. 1548 /// 1549 /// All name lookup is performed based on some specific criteria, 1550 /// which specify what names will be visible to name lookup and how 1551 /// far name lookup should work. These criteria are important both 1552 /// for capturing language semantics (certain lookups will ignore 1553 /// certain names, for example) and for performance, since name 1554 /// lookup is often a bottleneck in the compilation of C++. Name 1555 /// lookup criteria is specified via the LookupCriteria enumeration. 1556 /// 1557 /// The results of name lookup can vary based on the kind of name 1558 /// lookup performed, the current language, and the translation 1559 /// unit. In C, for example, name lookup will either return nothing 1560 /// (no entity found) or a single declaration. In C++, name lookup 1561 /// can additionally refer to a set of overloaded functions or 1562 /// result in an ambiguity. All of the possible results of name 1563 /// lookup are captured by the LookupResult class, which provides 1564 /// the ability to distinguish among them. 1565 //@{ 1566 1567 /// @brief Describes the kind of name lookup to perform. 1568 enum LookupNameKind { 1569 /// Ordinary name lookup, which finds ordinary names (functions, 1570 /// variables, typedefs, etc.) in C and most kinds of names 1571 /// (functions, variables, members, types, etc.) in C++. 1572 LookupOrdinaryName = 0, 1573 /// Tag name lookup, which finds the names of enums, classes, 1574 /// structs, and unions. 1575 LookupTagName, 1576 /// Label name lookup. 1577 LookupLabel, 1578 /// Member name lookup, which finds the names of 1579 /// class/struct/union members. 1580 LookupMemberName, 1581 /// Look up of an operator name (e.g., operator+) for use with 1582 /// operator overloading. This lookup is similar to ordinary name 1583 /// lookup, but will ignore any declarations that are class members. 1584 LookupOperatorName, 1585 /// Look up of a name that precedes the '::' scope resolution 1586 /// operator in C++. This lookup completely ignores operator, object, 1587 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1588 LookupNestedNameSpecifierName, 1589 /// Look up a namespace name within a C++ using directive or 1590 /// namespace alias definition, ignoring non-namespace names (C++ 1591 /// [basic.lookup.udir]p1). 1592 LookupNamespaceName, 1593 /// Look up all declarations in a scope with the given name, 1594 /// including resolved using declarations. This is appropriate 1595 /// for checking redeclarations for a using declaration. 1596 LookupUsingDeclName, 1597 /// Look up an ordinary name that is going to be redeclared as a 1598 /// name with linkage. This lookup ignores any declarations that 1599 /// are outside of the current scope unless they have linkage. See 1600 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1601 LookupRedeclarationWithLinkage, 1602 /// Look up the name of an Objective-C protocol. 1603 LookupObjCProtocolName, 1604 /// \brief Look up any declaration with any name. 1605 LookupAnyName 1606 }; 1607 1608 /// \brief Specifies whether (or how) name lookup is being performed for a 1609 /// redeclaration (vs. a reference). 1610 enum RedeclarationKind { 1611 /// \brief The lookup is a reference to this name that is not for the 1612 /// purpose of redeclaring the name. 1613 NotForRedeclaration = 0, 1614 /// \brief The lookup results will be used for redeclaration of a name, 1615 /// if an entity by that name already exists. 1616 ForRedeclaration 1617 }; 1618 1619private: 1620 bool CppLookupName(LookupResult &R, Scope *S); 1621 1622 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1623 CXXSpecialMember SM, 1624 bool ConstArg, 1625 bool VolatileArg, 1626 bool RValueThis, 1627 bool ConstThis, 1628 bool VolatileThis); 1629 1630 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1631 // 1632 // The boolean value will be true to indicate that the namespace was loaded 1633 // from an AST/PCH file, or false otherwise. 1634 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1635 1636 /// \brief Whether we have already loaded known namespaces from an extenal 1637 /// source. 1638 bool LoadedExternalKnownNamespaces; 1639 1640public: 1641 /// \brief Look up a name, looking for a single declaration. Return 1642 /// null if the results were absent, ambiguous, or overloaded. 1643 /// 1644 /// It is preferable to use the elaborated form and explicitly handle 1645 /// ambiguity and overloaded. 1646 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1647 SourceLocation Loc, 1648 LookupNameKind NameKind, 1649 RedeclarationKind Redecl 1650 = NotForRedeclaration); 1651 bool LookupName(LookupResult &R, Scope *S, 1652 bool AllowBuiltinCreation = false); 1653 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1654 bool InUnqualifiedLookup = false); 1655 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1656 bool AllowBuiltinCreation = false, 1657 bool EnteringContext = false); 1658 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1659 1660 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1661 QualType T1, QualType T2, 1662 UnresolvedSetImpl &Functions); 1663 1664 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1665 SourceLocation GnuLabelLoc = SourceLocation()); 1666 1667 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1668 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1669 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1670 unsigned Quals, 1671 bool *ConstParam = 0); 1672 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1673 bool RValueThis, unsigned ThisQuals, 1674 bool *ConstParam = 0); 1675 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1676 1677 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1678 Expr **Args, unsigned NumArgs, 1679 ADLResult &Functions, 1680 bool StdNamespaceIsAssociated = false); 1681 1682 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1683 VisibleDeclConsumer &Consumer, 1684 bool IncludeGlobalScope = true); 1685 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1686 VisibleDeclConsumer &Consumer, 1687 bool IncludeGlobalScope = true); 1688 1689 /// \brief The context in which typo-correction occurs. 1690 /// 1691 /// The typo-correction context affects which keywords (if any) are 1692 /// considered when trying to correct for typos. 1693 enum CorrectTypoContext { 1694 /// \brief An unknown context, where any keyword might be valid. 1695 CTC_Unknown, 1696 /// \brief A context where no keywords are used (e.g. we expect an actual 1697 /// name). 1698 CTC_NoKeywords, 1699 /// \brief A context where we're correcting a type name. 1700 CTC_Type, 1701 /// \brief An expression context. 1702 CTC_Expression, 1703 /// \brief A type cast, or anything else that can be followed by a '<'. 1704 CTC_CXXCasts, 1705 /// \brief A member lookup context. 1706 CTC_MemberLookup, 1707 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1708 CTC_ObjCIvarLookup, 1709 /// \brief An Objective-C property lookup context (e.g., self.prop). 1710 CTC_ObjCPropertyLookup, 1711 /// \brief The receiver of an Objective-C message send within an 1712 /// Objective-C method where 'super' is a valid keyword. 1713 CTC_ObjCMessageReceiver 1714 }; 1715 1716 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1717 Sema::LookupNameKind LookupKind, 1718 Scope *S, CXXScopeSpec *SS, 1719 DeclContext *MemberContext = NULL, 1720 bool EnteringContext = false, 1721 CorrectTypoContext CTC = CTC_Unknown, 1722 const ObjCObjectPointerType *OPT = NULL); 1723 1724 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1725 AssociatedNamespaceSet &AssociatedNamespaces, 1726 AssociatedClassSet &AssociatedClasses); 1727 1728 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1729 bool ConsiderLinkage, 1730 bool ExplicitInstantiationOrSpecialization); 1731 1732 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1733 //@} 1734 1735 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1736 SourceLocation IdLoc, 1737 bool TypoCorrection = false); 1738 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1739 Scope *S, bool ForRedeclaration, 1740 SourceLocation Loc); 1741 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1742 Scope *S); 1743 void AddKnownFunctionAttributes(FunctionDecl *FD); 1744 1745 // More parsing and symbol table subroutines. 1746 1747 // Decl attributes - this routine is the top level dispatcher. 1748 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1749 bool NonInheritable = true, bool Inheritable = true); 1750 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1751 bool NonInheritable = true, bool Inheritable = true); 1752 1753 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1754 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1755 bool CheckNoReturnAttr(const AttributeList &attr); 1756 1757 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1758 bool &IncompleteImpl, unsigned DiagID); 1759 void WarnConflictingTypedMethods(ObjCMethodDecl *ImpMethod, 1760 ObjCMethodDecl *MethodDecl, 1761 bool IsProtocolMethodDecl); 1762 1763 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1764 ObjCInterfaceDecl *IDecl); 1765 1766 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1767 1768 /// CheckProtocolMethodDefs - This routine checks unimplemented 1769 /// methods declared in protocol, and those referenced by it. 1770 /// \param IDecl - Used for checking for methods which may have been 1771 /// inherited. 1772 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1773 ObjCProtocolDecl *PDecl, 1774 bool& IncompleteImpl, 1775 const SelectorSet &InsMap, 1776 const SelectorSet &ClsMap, 1777 ObjCContainerDecl *CDecl); 1778 1779 /// CheckImplementationIvars - This routine checks if the instance variables 1780 /// listed in the implelementation match those listed in the interface. 1781 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1782 ObjCIvarDecl **Fields, unsigned nIvars, 1783 SourceLocation Loc); 1784 1785 /// \brief Determine whether we can synthesize a provisional ivar for the 1786 /// given name. 1787 ObjCPropertyDecl *canSynthesizeProvisionalIvar(IdentifierInfo *II); 1788 1789 /// \brief Determine whether we can synthesize a provisional ivar for the 1790 /// given property. 1791 bool canSynthesizeProvisionalIvar(ObjCPropertyDecl *Property); 1792 1793 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1794 /// remains unimplemented in the class or category @implementation. 1795 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1796 ObjCContainerDecl* IDecl, 1797 bool IncompleteImpl = false); 1798 1799 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1800 /// which must be implemented by this implementation. 1801 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1802 ObjCContainerDecl *CDecl, 1803 const SelectorSet &InsMap); 1804 1805 /// DefaultSynthesizeProperties - This routine default synthesizes all 1806 /// properties which must be synthesized in class's @implementation. 1807 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1808 ObjCInterfaceDecl *IDecl); 1809 1810 /// CollectImmediateProperties - This routine collects all properties in 1811 /// the class and its conforming protocols; but not those it its super class. 1812 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1813 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1814 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1815 1816 1817 /// LookupPropertyDecl - Looks up a property in the current class and all 1818 /// its protocols. 1819 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1820 IdentifierInfo *II); 1821 1822 /// Called by ActOnProperty to handle @property declarations in 1823 //// class extensions. 1824 Decl *HandlePropertyInClassExtension(Scope *S, 1825 ObjCCategoryDecl *CDecl, 1826 SourceLocation AtLoc, 1827 FieldDeclarator &FD, 1828 Selector GetterSel, 1829 Selector SetterSel, 1830 const bool isAssign, 1831 const bool isReadWrite, 1832 const unsigned Attributes, 1833 bool *isOverridingProperty, 1834 TypeSourceInfo *T, 1835 tok::ObjCKeywordKind MethodImplKind); 1836 1837 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1838 /// handle creating the ObjcPropertyDecl for a category or @interface. 1839 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1840 ObjCContainerDecl *CDecl, 1841 SourceLocation AtLoc, 1842 FieldDeclarator &FD, 1843 Selector GetterSel, 1844 Selector SetterSel, 1845 const bool isAssign, 1846 const bool isReadWrite, 1847 const unsigned Attributes, 1848 TypeSourceInfo *T, 1849 tok::ObjCKeywordKind MethodImplKind, 1850 DeclContext *lexicalDC = 0); 1851 1852 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1853 /// warning) when atomic property has one but not the other user-declared 1854 /// setter or getter. 1855 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1856 ObjCContainerDecl* IDecl); 1857 1858 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 1859 1860 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1861 1862 enum MethodMatchStrategy { 1863 MMS_loose, 1864 MMS_strict 1865 }; 1866 1867 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1868 /// true, or false, accordingly. 1869 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1870 const ObjCMethodDecl *PrevMethod, 1871 MethodMatchStrategy strategy = MMS_strict); 1872 1873 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1874 /// or protocol against those declared in their implementations. 1875 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1876 const SelectorSet &ClsMap, 1877 SelectorSet &InsMapSeen, 1878 SelectorSet &ClsMapSeen, 1879 ObjCImplDecl* IMPDecl, 1880 ObjCContainerDecl* IDecl, 1881 bool &IncompleteImpl, 1882 bool ImmediateClass); 1883 1884private: 1885 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1886 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1887 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1888 1889 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1890 /// optionally warns if there are multiple signatures. 1891 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1892 bool receiverIdOrClass, 1893 bool warn, bool instance); 1894 1895public: 1896 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1897 /// unit are added to a global pool. This allows us to efficiently associate 1898 /// a selector with a method declaraation for purposes of typechecking 1899 /// messages sent to "id" (where the class of the object is unknown). 1900 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1901 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1902 } 1903 1904 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1905 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1906 AddMethodToGlobalPool(Method, impl, /*instance*/false); 1907 } 1908 1909 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 1910 /// there are multiple signatures. 1911 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 1912 bool receiverIdOrClass=false, 1913 bool warn=true) { 1914 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1915 warn, /*instance*/true); 1916 } 1917 1918 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 1919 /// there are multiple signatures. 1920 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 1921 bool receiverIdOrClass=false, 1922 bool warn=true) { 1923 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1924 warn, /*instance*/false); 1925 } 1926 1927 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 1928 /// implementation. 1929 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 1930 1931 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 1932 /// initialization. 1933 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 1934 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 1935 1936 //===--------------------------------------------------------------------===// 1937 // Statement Parsing Callbacks: SemaStmt.cpp. 1938public: 1939 class FullExprArg { 1940 public: 1941 FullExprArg(Sema &actions) : E(0) { } 1942 1943 // FIXME: The const_cast here is ugly. RValue references would make this 1944 // much nicer (or we could duplicate a bunch of the move semantics 1945 // emulation code from Ownership.h). 1946 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 1947 1948 ExprResult release() { 1949 return move(E); 1950 } 1951 1952 Expr *get() const { return E; } 1953 1954 Expr *operator->() { 1955 return E; 1956 } 1957 1958 private: 1959 // FIXME: No need to make the entire Sema class a friend when it's just 1960 // Sema::MakeFullExpr that needs access to the constructor below. 1961 friend class Sema; 1962 1963 explicit FullExprArg(Expr *expr) : E(expr) {} 1964 1965 Expr *E; 1966 }; 1967 1968 FullExprArg MakeFullExpr(Expr *Arg) { 1969 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 1970 } 1971 1972 StmtResult ActOnExprStmt(FullExprArg Expr); 1973 1974 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 1975 SourceLocation LeadingEmptyMacroLoc = SourceLocation()); 1976 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 1977 MultiStmtArg Elts, 1978 bool isStmtExpr); 1979 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 1980 SourceLocation StartLoc, 1981 SourceLocation EndLoc); 1982 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 1983 StmtResult ActOnForEachLValueExpr(Expr *E); 1984 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 1985 SourceLocation DotDotDotLoc, Expr *RHSVal, 1986 SourceLocation ColonLoc); 1987 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 1988 1989 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 1990 SourceLocation ColonLoc, 1991 Stmt *SubStmt, Scope *CurScope); 1992 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 1993 SourceLocation ColonLoc, Stmt *SubStmt); 1994 1995 StmtResult ActOnIfStmt(SourceLocation IfLoc, 1996 FullExprArg CondVal, Decl *CondVar, 1997 Stmt *ThenVal, 1998 SourceLocation ElseLoc, Stmt *ElseVal); 1999 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2000 Expr *Cond, 2001 Decl *CondVar); 2002 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2003 Stmt *Switch, Stmt *Body); 2004 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2005 FullExprArg Cond, 2006 Decl *CondVar, Stmt *Body); 2007 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2008 SourceLocation WhileLoc, 2009 SourceLocation CondLParen, Expr *Cond, 2010 SourceLocation CondRParen); 2011 2012 StmtResult ActOnForStmt(SourceLocation ForLoc, 2013 SourceLocation LParenLoc, 2014 Stmt *First, FullExprArg Second, 2015 Decl *SecondVar, 2016 FullExprArg Third, 2017 SourceLocation RParenLoc, 2018 Stmt *Body); 2019 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2020 SourceLocation LParenLoc, 2021 Stmt *First, Expr *Second, 2022 SourceLocation RParenLoc, Stmt *Body); 2023 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2024 SourceLocation LParenLoc, Stmt *LoopVar, 2025 SourceLocation ColonLoc, Expr *Collection, 2026 SourceLocation RParenLoc); 2027 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2028 SourceLocation ColonLoc, 2029 Stmt *RangeDecl, Stmt *BeginEndDecl, 2030 Expr *Cond, Expr *Inc, 2031 Stmt *LoopVarDecl, 2032 SourceLocation RParenLoc); 2033 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2034 2035 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2036 SourceLocation LabelLoc, 2037 LabelDecl *TheDecl); 2038 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2039 SourceLocation StarLoc, 2040 Expr *DestExp); 2041 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2042 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2043 2044 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2045 bool AllowFunctionParameters); 2046 2047 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2048 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2049 2050 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2051 bool IsSimple, bool IsVolatile, 2052 unsigned NumOutputs, unsigned NumInputs, 2053 IdentifierInfo **Names, 2054 MultiExprArg Constraints, 2055 MultiExprArg Exprs, 2056 Expr *AsmString, 2057 MultiExprArg Clobbers, 2058 SourceLocation RParenLoc, 2059 bool MSAsm = false); 2060 2061 2062 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2063 SourceLocation StartLoc, 2064 SourceLocation IdLoc, IdentifierInfo *Id, 2065 bool Invalid = false); 2066 2067 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2068 2069 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2070 Decl *Parm, Stmt *Body); 2071 2072 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2073 2074 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2075 MultiStmtArg Catch, Stmt *Finally); 2076 2077 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2078 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2079 Scope *CurScope); 2080 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2081 Expr *SynchExpr, 2082 Stmt *SynchBody); 2083 2084 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2085 2086 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2087 SourceLocation StartLoc, 2088 SourceLocation IdLoc, 2089 IdentifierInfo *Id); 2090 2091 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2092 2093 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2094 Decl *ExDecl, Stmt *HandlerBlock); 2095 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2096 MultiStmtArg Handlers); 2097 2098 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2099 SourceLocation TryLoc, 2100 Stmt *TryBlock, 2101 Stmt *Handler); 2102 2103 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2104 Expr *FilterExpr, 2105 Stmt *Block); 2106 2107 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2108 Stmt *Block); 2109 2110 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2111 2112 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2113 2114 /// \brief If it's a file scoped decl that must warn if not used, keep track 2115 /// of it. 2116 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2117 2118 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2119 /// whose result is unused, warn. 2120 void DiagnoseUnusedExprResult(const Stmt *S); 2121 void DiagnoseUnusedDecl(const NamedDecl *ND); 2122 2123 ParsingDeclState PushParsingDeclaration() { 2124 return DelayedDiagnostics.pushParsingDecl(); 2125 } 2126 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2127 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2128 } 2129 2130 typedef ProcessingContextState ParsingClassState; 2131 ParsingClassState PushParsingClass() { 2132 return DelayedDiagnostics.pushContext(); 2133 } 2134 void PopParsingClass(ParsingClassState state) { 2135 DelayedDiagnostics.popContext(state); 2136 } 2137 2138 void EmitDeprecationWarning(NamedDecl *D, llvm::StringRef Message, 2139 SourceLocation Loc, 2140 const ObjCInterfaceDecl *UnknownObjCClass=0); 2141 2142 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2143 2144 bool makeUnavailableInSystemHeader(SourceLocation loc, 2145 llvm::StringRef message); 2146 2147 //===--------------------------------------------------------------------===// 2148 // Expression Parsing Callbacks: SemaExpr.cpp. 2149 2150 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2151 const ObjCInterfaceDecl *UnknownObjCClass=0); 2152 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2153 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2154 ObjCMethodDecl *Getter, 2155 SourceLocation Loc); 2156 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2157 Expr **Args, unsigned NumArgs); 2158 2159 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 2160 2161 void PopExpressionEvaluationContext(); 2162 2163 void DiscardCleanupsInEvaluationContext(); 2164 2165 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 2166 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2167 void MarkDeclarationsReferencedInExpr(Expr *E); 2168 2169 /// \brief Figure out if an expression could be turned into a call. 2170 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2171 UnresolvedSetImpl &NonTemplateOverloads); 2172 /// \brief Give notes for a set of overloads. 2173 void NoteOverloads(const UnresolvedSetImpl &Overloads, 2174 const SourceLocation FinalNoteLoc); 2175 2176 /// \brief Conditionally issue a diagnostic based on the current 2177 /// evaluation context. 2178 /// 2179 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2180 /// the function body is parsed, and then do a basic reachability analysis to 2181 /// determine if the statement is reachable. If it is unreachable, the 2182 /// diagnostic will not be emitted. 2183 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *stmt, 2184 const PartialDiagnostic &PD); 2185 2186 // Primary Expressions. 2187 SourceRange getExprRange(Expr *E) const; 2188 2189 ObjCIvarDecl *SynthesizeProvisionalIvar(LookupResult &Lookup, 2190 IdentifierInfo *II, 2191 SourceLocation NameLoc); 2192 2193 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Name, 2194 bool HasTrailingLParen, bool IsAddressOfOperand); 2195 2196 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2197 TemplateArgumentListInfo &Buffer, 2198 DeclarationNameInfo &NameInfo, 2199 const TemplateArgumentListInfo *&TemplateArgs); 2200 2201 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2202 CorrectTypoContext CTC = CTC_Unknown); 2203 2204 ExprResult LookupInObjCMethod(LookupResult &R, Scope *S, IdentifierInfo *II, 2205 bool AllowBuiltinCreation=false); 2206 2207 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2208 const DeclarationNameInfo &NameInfo, 2209 bool isAddressOfOperand, 2210 const TemplateArgumentListInfo *TemplateArgs); 2211 2212 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2213 ExprValueKind VK, 2214 SourceLocation Loc, 2215 const CXXScopeSpec *SS = 0); 2216 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2217 ExprValueKind VK, 2218 const DeclarationNameInfo &NameInfo, 2219 const CXXScopeSpec *SS = 0); 2220 ExprResult 2221 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2222 SourceLocation nameLoc, 2223 IndirectFieldDecl *indirectField, 2224 Expr *baseObjectExpr = 0, 2225 SourceLocation opLoc = SourceLocation()); 2226 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2227 LookupResult &R, 2228 const TemplateArgumentListInfo *TemplateArgs); 2229 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2230 LookupResult &R, 2231 const TemplateArgumentListInfo *TemplateArgs, 2232 bool IsDefiniteInstance); 2233 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2234 const LookupResult &R, 2235 bool HasTrailingLParen); 2236 2237 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2238 const DeclarationNameInfo &NameInfo); 2239 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2240 const DeclarationNameInfo &NameInfo, 2241 const TemplateArgumentListInfo *TemplateArgs); 2242 2243 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2244 LookupResult &R, 2245 bool ADL); 2246 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2247 const DeclarationNameInfo &NameInfo, 2248 NamedDecl *D); 2249 2250 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2251 ExprResult ActOnNumericConstant(const Token &); 2252 ExprResult ActOnCharacterConstant(const Token &); 2253 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *Val); 2254 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2255 SourceLocation R, 2256 MultiExprArg Val); 2257 2258 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2259 /// fragments (e.g. "foo" "bar" L"baz"). 2260 ExprResult ActOnStringLiteral(const Token *Toks, unsigned NumToks); 2261 2262 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2263 SourceLocation DefaultLoc, 2264 SourceLocation RParenLoc, 2265 Expr *ControllingExpr, 2266 MultiTypeArg Types, 2267 MultiExprArg Exprs); 2268 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2269 SourceLocation DefaultLoc, 2270 SourceLocation RParenLoc, 2271 Expr *ControllingExpr, 2272 TypeSourceInfo **Types, 2273 Expr **Exprs, 2274 unsigned NumAssocs); 2275 2276 // Binary/Unary Operators. 'Tok' is the token for the operator. 2277 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2278 Expr *InputArg); 2279 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2280 UnaryOperatorKind Opc, Expr *input); 2281 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2282 tok::TokenKind Op, Expr *Input); 2283 2284 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *T, 2285 SourceLocation OpLoc, 2286 UnaryExprOrTypeTrait ExprKind, 2287 SourceRange R); 2288 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2289 UnaryExprOrTypeTrait ExprKind); 2290 ExprResult 2291 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2292 UnaryExprOrTypeTrait ExprKind, 2293 bool isType, void *TyOrEx, 2294 const SourceRange &ArgRange); 2295 2296 ExprResult CheckPlaceholderExpr(Expr *E); 2297 bool CheckVecStepExpr(Expr *E); 2298 2299 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2300 bool CheckUnaryExprOrTypeTraitOperand(QualType type, SourceLocation OpLoc, 2301 SourceRange R, 2302 UnaryExprOrTypeTrait ExprKind); 2303 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2304 SourceLocation OpLoc, 2305 IdentifierInfo &Name, 2306 SourceLocation NameLoc, 2307 SourceLocation RParenLoc); 2308 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2309 tok::TokenKind Kind, Expr *Input); 2310 2311 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2312 Expr *Idx, SourceLocation RLoc); 2313 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2314 Expr *Idx, SourceLocation RLoc); 2315 2316 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2317 SourceLocation OpLoc, bool IsArrow, 2318 CXXScopeSpec &SS, 2319 NamedDecl *FirstQualifierInScope, 2320 const DeclarationNameInfo &NameInfo, 2321 const TemplateArgumentListInfo *TemplateArgs); 2322 2323 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2324 SourceLocation OpLoc, bool IsArrow, 2325 const CXXScopeSpec &SS, 2326 NamedDecl *FirstQualifierInScope, 2327 LookupResult &R, 2328 const TemplateArgumentListInfo *TemplateArgs, 2329 bool SuppressQualifierCheck = false); 2330 2331 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2332 bool &IsArrow, SourceLocation OpLoc, 2333 CXXScopeSpec &SS, 2334 Decl *ObjCImpDecl, 2335 bool HasTemplateArgs); 2336 2337 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2338 const CXXScopeSpec &SS, 2339 const LookupResult &R); 2340 2341 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2342 bool IsArrow, SourceLocation OpLoc, 2343 const CXXScopeSpec &SS, 2344 NamedDecl *FirstQualifierInScope, 2345 const DeclarationNameInfo &NameInfo, 2346 const TemplateArgumentListInfo *TemplateArgs); 2347 2348 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2349 SourceLocation OpLoc, 2350 tok::TokenKind OpKind, 2351 CXXScopeSpec &SS, 2352 UnqualifiedId &Member, 2353 Decl *ObjCImpDecl, 2354 bool HasTrailingLParen); 2355 2356 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2357 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2358 FunctionDecl *FDecl, 2359 const FunctionProtoType *Proto, 2360 Expr **Args, unsigned NumArgs, 2361 SourceLocation RParenLoc); 2362 2363 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2364 /// This provides the location of the left/right parens and a list of comma 2365 /// locations. 2366 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2367 MultiExprArg Args, SourceLocation RParenLoc, 2368 Expr *ExecConfig = 0); 2369 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2370 SourceLocation LParenLoc, 2371 Expr **Args, unsigned NumArgs, 2372 SourceLocation RParenLoc, 2373 Expr *ExecConfig = 0); 2374 2375 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2376 MultiExprArg ExecConfig, SourceLocation GGGLoc); 2377 2378 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2379 Declarator &D, ParsedType &Ty, 2380 SourceLocation RParenLoc, Expr *Op); 2381 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2382 TypeSourceInfo *Ty, 2383 SourceLocation RParenLoc, 2384 Expr *Op); 2385 2386 /// \brief Build an altivec or OpenCL literal. 2387 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2388 SourceLocation RParenLoc, Expr *E, 2389 TypeSourceInfo *TInfo); 2390 2391 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2392 2393 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2394 ParsedType Ty, 2395 SourceLocation RParenLoc, 2396 Expr *Op); 2397 2398 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2399 TypeSourceInfo *TInfo, 2400 SourceLocation RParenLoc, 2401 Expr *InitExpr); 2402 2403 ExprResult ActOnInitList(SourceLocation LParenLoc, 2404 MultiExprArg InitList, 2405 SourceLocation RParenLoc); 2406 2407 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2408 SourceLocation Loc, 2409 bool GNUSyntax, 2410 ExprResult Init); 2411 2412 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2413 tok::TokenKind Kind, Expr *LHS, Expr *RHS); 2414 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2415 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2416 ExprResult CreateBuiltinBinOp(SourceLocation TokLoc, 2417 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2418 2419 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2420 /// in the case of a the GNU conditional expr extension. 2421 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2422 SourceLocation ColonLoc, 2423 Expr *Cond, Expr *LHS, Expr *RHS); 2424 2425 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2426 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2427 LabelDecl *LD); 2428 2429 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2430 SourceLocation RPLoc); // "({..})" 2431 2432 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2433 struct OffsetOfComponent { 2434 SourceLocation LocStart, LocEnd; 2435 bool isBrackets; // true if [expr], false if .ident 2436 union { 2437 IdentifierInfo *IdentInfo; 2438 ExprTy *E; 2439 } U; 2440 }; 2441 2442 /// __builtin_offsetof(type, a.b[123][456].c) 2443 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2444 TypeSourceInfo *TInfo, 2445 OffsetOfComponent *CompPtr, 2446 unsigned NumComponents, 2447 SourceLocation RParenLoc); 2448 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2449 SourceLocation BuiltinLoc, 2450 SourceLocation TypeLoc, 2451 ParsedType Arg1, 2452 OffsetOfComponent *CompPtr, 2453 unsigned NumComponents, 2454 SourceLocation RParenLoc); 2455 2456 // __builtin_choose_expr(constExpr, expr1, expr2) 2457 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2458 Expr *cond, Expr *expr1, 2459 Expr *expr2, SourceLocation RPLoc); 2460 2461 // __builtin_va_arg(expr, type) 2462 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, 2463 Expr *expr, ParsedType type, 2464 SourceLocation RPLoc); 2465 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, 2466 Expr *expr, TypeSourceInfo *TInfo, 2467 SourceLocation RPLoc); 2468 2469 // __null 2470 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2471 2472 bool CheckCaseExpression(Expr *expr); 2473 2474 bool CheckMicrosoftIfExistsSymbol(CXXScopeSpec &SS, UnqualifiedId &Name); 2475 2476 //===------------------------- "Block" Extension ------------------------===// 2477 2478 /// ActOnBlockStart - This callback is invoked when a block literal is 2479 /// started. 2480 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2481 2482 /// ActOnBlockArguments - This callback allows processing of block arguments. 2483 /// If there are no arguments, this is still invoked. 2484 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2485 2486 /// ActOnBlockError - If there is an error parsing a block, this callback 2487 /// is invoked to pop the information about the block from the action impl. 2488 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2489 2490 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2491 /// literal was successfully completed. ^(int x){...} 2492 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, 2493 Stmt *Body, Scope *CurScope); 2494 2495 //===---------------------------- OpenCL Features -----------------------===// 2496 2497 /// __builtin_astype(...) 2498 ExprResult ActOnAsTypeExpr(Expr *expr, ParsedType DestTy, 2499 SourceLocation BuiltinLoc, 2500 SourceLocation RParenLoc); 2501 2502 //===---------------------------- C++ Features --------------------------===// 2503 2504 // Act on C++ namespaces 2505 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2506 SourceLocation NamespaceLoc, 2507 SourceLocation IdentLoc, 2508 IdentifierInfo *Ident, 2509 SourceLocation LBrace, 2510 AttributeList *AttrList); 2511 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2512 2513 NamespaceDecl *getStdNamespace() const; 2514 NamespaceDecl *getOrCreateStdNamespace(); 2515 2516 CXXRecordDecl *getStdBadAlloc() const; 2517 2518 Decl *ActOnUsingDirective(Scope *CurScope, 2519 SourceLocation UsingLoc, 2520 SourceLocation NamespcLoc, 2521 CXXScopeSpec &SS, 2522 SourceLocation IdentLoc, 2523 IdentifierInfo *NamespcName, 2524 AttributeList *AttrList); 2525 2526 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2527 2528 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2529 SourceLocation NamespaceLoc, 2530 SourceLocation AliasLoc, 2531 IdentifierInfo *Alias, 2532 CXXScopeSpec &SS, 2533 SourceLocation IdentLoc, 2534 IdentifierInfo *Ident); 2535 2536 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2537 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2538 const LookupResult &PreviousDecls); 2539 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2540 NamedDecl *Target); 2541 2542 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2543 bool isTypeName, 2544 const CXXScopeSpec &SS, 2545 SourceLocation NameLoc, 2546 const LookupResult &Previous); 2547 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2548 const CXXScopeSpec &SS, 2549 SourceLocation NameLoc); 2550 2551 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2552 SourceLocation UsingLoc, 2553 CXXScopeSpec &SS, 2554 const DeclarationNameInfo &NameInfo, 2555 AttributeList *AttrList, 2556 bool IsInstantiation, 2557 bool IsTypeName, 2558 SourceLocation TypenameLoc); 2559 2560 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2561 2562 Decl *ActOnUsingDeclaration(Scope *CurScope, 2563 AccessSpecifier AS, 2564 bool HasUsingKeyword, 2565 SourceLocation UsingLoc, 2566 CXXScopeSpec &SS, 2567 UnqualifiedId &Name, 2568 AttributeList *AttrList, 2569 bool IsTypeName, 2570 SourceLocation TypenameLoc); 2571 Decl *ActOnAliasDeclaration(Scope *CurScope, 2572 AccessSpecifier AS, 2573 MultiTemplateParamsArg TemplateParams, 2574 SourceLocation UsingLoc, 2575 UnqualifiedId &Name, 2576 TypeResult Type); 2577 2578 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2579 /// ActOnDeclarator, when a C++ direct initializer is present. 2580 /// e.g: "int x(1);" 2581 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2582 SourceLocation LParenLoc, 2583 MultiExprArg Exprs, 2584 SourceLocation RParenLoc, 2585 bool TypeMayContainAuto); 2586 2587 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2588 /// and sets it as the initializer for the the passed in VarDecl. 2589 bool InitializeVarWithConstructor(VarDecl *VD, 2590 CXXConstructorDecl *Constructor, 2591 MultiExprArg Exprs); 2592 2593 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2594 /// including handling of its default argument expressions. 2595 /// 2596 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2597 ExprResult 2598 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2599 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2600 bool RequiresZeroInit, unsigned ConstructKind, 2601 SourceRange ParenRange); 2602 2603 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2604 // the constructor can be elidable? 2605 ExprResult 2606 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2607 CXXConstructorDecl *Constructor, bool Elidable, 2608 MultiExprArg Exprs, bool RequiresZeroInit, 2609 unsigned ConstructKind, 2610 SourceRange ParenRange); 2611 2612 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2613 /// the default expr if needed. 2614 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2615 FunctionDecl *FD, 2616 ParmVarDecl *Param); 2617 2618 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2619 /// constructed variable. 2620 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2621 2622 /// \brief Helper class that collects exception specifications for 2623 /// implicitly-declared special member functions. 2624 class ImplicitExceptionSpecification { 2625 // Pointer to allow copying 2626 ASTContext *Context; 2627 // We order exception specifications thus: 2628 // noexcept is the most restrictive, but is only used in C++0x. 2629 // throw() comes next. 2630 // Then a throw(collected exceptions) 2631 // Finally no specification. 2632 // throw(...) is used instead if any called function uses it. 2633 // 2634 // If this exception specification cannot be known yet (for instance, 2635 // because this is the exception specification for a defaulted default 2636 // constructor and we haven't finished parsing the deferred parts of the 2637 // class yet), the C++0x standard does not specify how to behave. We 2638 // record this as an 'unknown' exception specification, which overrules 2639 // any other specification (even 'none', to keep this rule simple). 2640 ExceptionSpecificationType ComputedEST; 2641 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2642 llvm::SmallVector<QualType, 4> Exceptions; 2643 2644 void ClearExceptions() { 2645 ExceptionsSeen.clear(); 2646 Exceptions.clear(); 2647 } 2648 2649 public: 2650 explicit ImplicitExceptionSpecification(ASTContext &Context) 2651 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2652 if (!Context.getLangOptions().CPlusPlus0x) 2653 ComputedEST = EST_DynamicNone; 2654 } 2655 2656 /// \brief Get the computed exception specification type. 2657 ExceptionSpecificationType getExceptionSpecType() const { 2658 assert(ComputedEST != EST_ComputedNoexcept && 2659 "noexcept(expr) should not be a possible result"); 2660 return ComputedEST; 2661 } 2662 2663 /// \brief The number of exceptions in the exception specification. 2664 unsigned size() const { return Exceptions.size(); } 2665 2666 /// \brief The set of exceptions in the exception specification. 2667 const QualType *data() const { return Exceptions.data(); } 2668 2669 /// \brief Integrate another called method into the collected data. 2670 void CalledDecl(CXXMethodDecl *Method); 2671 2672 /// \brief Integrate an invoked expression into the collected data. 2673 void CalledExpr(Expr *E); 2674 2675 /// \brief Specify that the exception specification can't be detemined yet. 2676 void SetDelayed() { 2677 ClearExceptions(); 2678 ComputedEST = EST_Delayed; 2679 } 2680 2681 FunctionProtoType::ExtProtoInfo getEPI() const { 2682 FunctionProtoType::ExtProtoInfo EPI; 2683 EPI.ExceptionSpecType = getExceptionSpecType(); 2684 EPI.NumExceptions = size(); 2685 EPI.Exceptions = data(); 2686 return EPI; 2687 } 2688 }; 2689 2690 /// \brief Determine what sort of exception specification a defaulted 2691 /// copy constructor of a class will have. 2692 ImplicitExceptionSpecification 2693 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2694 2695 /// \brief Determine what sort of exception specification a defaulted 2696 /// default constructor of a class will have, and whether the parameter 2697 /// will be const. 2698 std::pair<ImplicitExceptionSpecification, bool> 2699 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2700 2701 /// \brief Determine what sort of exception specification a defautled 2702 /// copy assignment operator of a class will have, and whether the 2703 /// parameter will be const. 2704 std::pair<ImplicitExceptionSpecification, bool> 2705 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2706 2707 /// \brief Determine what sort of exception specification a defaulted 2708 /// destructor of a class will have. 2709 ImplicitExceptionSpecification 2710 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 2711 2712 /// \brief Determine if a defaulted default constructor ought to be 2713 /// deleted. 2714 bool ShouldDeleteDefaultConstructor(CXXConstructorDecl *CD); 2715 2716 /// \brief Determine if a defaulted copy constructor ought to be 2717 /// deleted. 2718 bool ShouldDeleteCopyConstructor(CXXConstructorDecl *CD); 2719 2720 /// \brief Determine if a defaulted copy assignment operator ought to be 2721 /// deleted. 2722 bool ShouldDeleteCopyAssignmentOperator(CXXMethodDecl *MD); 2723 2724 /// \brief Determine if a defaulted destructor ought to be deleted. 2725 bool ShouldDeleteDestructor(CXXDestructorDecl *DD); 2726 2727 /// \brief Declare the implicit default constructor for the given class. 2728 /// 2729 /// \param ClassDecl The class declaration into which the implicit 2730 /// default constructor will be added. 2731 /// 2732 /// \returns The implicitly-declared default constructor. 2733 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2734 CXXRecordDecl *ClassDecl); 2735 2736 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2737 /// defining this constructor as the default constructor. 2738 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2739 CXXConstructorDecl *Constructor); 2740 2741 /// \brief Declare the implicit destructor for the given class. 2742 /// 2743 /// \param ClassDecl The class declaration into which the implicit 2744 /// destructor will be added. 2745 /// 2746 /// \returns The implicitly-declared destructor. 2747 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2748 2749 /// DefineImplicitDestructor - Checks for feasibility of 2750 /// defining this destructor as the default destructor. 2751 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2752 CXXDestructorDecl *Destructor); 2753 2754 /// \brief Build an exception spec for destructors that don't have one. 2755 /// 2756 /// C++11 says that user-defined destructors with no exception spec get one 2757 /// that looks as if the destructor was implicitly declared. 2758 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 2759 CXXDestructorDecl *Destructor); 2760 2761 /// \brief Declare all inherited constructors for the given class. 2762 /// 2763 /// \param ClassDecl The class declaration into which the inherited 2764 /// constructors will be added. 2765 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2766 2767 /// \brief Declare the implicit copy constructor for the given class. 2768 /// 2769 /// \param S The scope of the class, which may be NULL if this is a 2770 /// template instantiation. 2771 /// 2772 /// \param ClassDecl The class declaration into which the implicit 2773 /// copy constructor will be added. 2774 /// 2775 /// \returns The implicitly-declared copy constructor. 2776 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2777 2778 /// DefineImplicitCopyConstructor - Checks for feasibility of 2779 /// defining this constructor as the copy constructor. 2780 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2781 CXXConstructorDecl *Constructor); 2782 2783 /// \brief Declare the implicit copy assignment operator for the given class. 2784 /// 2785 /// \param S The scope of the class, which may be NULL if this is a 2786 /// template instantiation. 2787 /// 2788 /// \param ClassDecl The class declaration into which the implicit 2789 /// copy-assignment operator will be added. 2790 /// 2791 /// \returns The implicitly-declared copy assignment operator. 2792 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2793 2794 /// \brief Defined an implicitly-declared copy assignment operator. 2795 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2796 CXXMethodDecl *MethodDecl); 2797 2798 /// \brief Force the declaration of any implicitly-declared members of this 2799 /// class. 2800 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2801 2802 /// MaybeBindToTemporary - If the passed in expression has a record type with 2803 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 2804 /// it simply returns the passed in expression. 2805 ExprResult MaybeBindToTemporary(Expr *E); 2806 2807 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 2808 MultiExprArg ArgsPtr, 2809 SourceLocation Loc, 2810 ASTOwningVector<Expr*> &ConvertedArgs); 2811 2812 ParsedType getDestructorName(SourceLocation TildeLoc, 2813 IdentifierInfo &II, SourceLocation NameLoc, 2814 Scope *S, CXXScopeSpec &SS, 2815 ParsedType ObjectType, 2816 bool EnteringContext); 2817 2818 // Checks that reinterpret casts don't have undefined behavior. 2819 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 2820 bool IsDereference, SourceRange Range); 2821 2822 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 2823 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 2824 tok::TokenKind Kind, 2825 SourceLocation LAngleBracketLoc, 2826 Declarator &D, 2827 SourceLocation RAngleBracketLoc, 2828 SourceLocation LParenLoc, 2829 Expr *E, 2830 SourceLocation RParenLoc); 2831 2832 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 2833 tok::TokenKind Kind, 2834 TypeSourceInfo *Ty, 2835 Expr *E, 2836 SourceRange AngleBrackets, 2837 SourceRange Parens); 2838 2839 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2840 SourceLocation TypeidLoc, 2841 TypeSourceInfo *Operand, 2842 SourceLocation RParenLoc); 2843 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2844 SourceLocation TypeidLoc, 2845 Expr *Operand, 2846 SourceLocation RParenLoc); 2847 2848 /// ActOnCXXTypeid - Parse typeid( something ). 2849 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 2850 SourceLocation LParenLoc, bool isType, 2851 void *TyOrExpr, 2852 SourceLocation RParenLoc); 2853 2854 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2855 SourceLocation TypeidLoc, 2856 TypeSourceInfo *Operand, 2857 SourceLocation RParenLoc); 2858 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2859 SourceLocation TypeidLoc, 2860 Expr *Operand, 2861 SourceLocation RParenLoc); 2862 2863 /// ActOnCXXUuidof - Parse __uuidof( something ). 2864 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 2865 SourceLocation LParenLoc, bool isType, 2866 void *TyOrExpr, 2867 SourceLocation RParenLoc); 2868 2869 2870 //// ActOnCXXThis - Parse 'this' pointer. 2871 ExprResult ActOnCXXThis(SourceLocation loc); 2872 2873 /// getAndCaptureCurrentThisType - Try to capture a 'this' pointer. Returns 2874 /// the type of the 'this' pointer, or a null type if this is not possible. 2875 QualType getAndCaptureCurrentThisType(); 2876 2877 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 2878 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 2879 2880 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 2881 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 2882 2883 //// ActOnCXXThrow - Parse throw expressions. 2884 ExprResult ActOnCXXThrow(SourceLocation OpLoc, Expr *expr); 2885 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E); 2886 2887 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 2888 /// Can be interpreted either as function-style casting ("int(x)") 2889 /// or class type construction ("ClassType(x,y,z)") 2890 /// or creation of a value-initialized type ("int()"). 2891 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 2892 SourceLocation LParenLoc, 2893 MultiExprArg Exprs, 2894 SourceLocation RParenLoc); 2895 2896 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 2897 SourceLocation LParenLoc, 2898 MultiExprArg Exprs, 2899 SourceLocation RParenLoc); 2900 2901 /// ActOnCXXNew - Parsed a C++ 'new' expression. 2902 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 2903 SourceLocation PlacementLParen, 2904 MultiExprArg PlacementArgs, 2905 SourceLocation PlacementRParen, 2906 SourceRange TypeIdParens, Declarator &D, 2907 SourceLocation ConstructorLParen, 2908 MultiExprArg ConstructorArgs, 2909 SourceLocation ConstructorRParen); 2910 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 2911 SourceLocation PlacementLParen, 2912 MultiExprArg PlacementArgs, 2913 SourceLocation PlacementRParen, 2914 SourceRange TypeIdParens, 2915 QualType AllocType, 2916 TypeSourceInfo *AllocTypeInfo, 2917 Expr *ArraySize, 2918 SourceLocation ConstructorLParen, 2919 MultiExprArg ConstructorArgs, 2920 SourceLocation ConstructorRParen, 2921 bool TypeMayContainAuto = true); 2922 2923 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 2924 SourceRange R); 2925 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 2926 bool UseGlobal, QualType AllocType, bool IsArray, 2927 Expr **PlaceArgs, unsigned NumPlaceArgs, 2928 FunctionDecl *&OperatorNew, 2929 FunctionDecl *&OperatorDelete); 2930 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 2931 DeclarationName Name, Expr** Args, 2932 unsigned NumArgs, DeclContext *Ctx, 2933 bool AllowMissing, FunctionDecl *&Operator, 2934 bool Diagnose = true); 2935 void DeclareGlobalNewDelete(); 2936 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 2937 QualType Argument, 2938 bool addMallocAttr = false); 2939 2940 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 2941 DeclarationName Name, FunctionDecl* &Operator, 2942 bool Diagnose = true); 2943 2944 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 2945 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 2946 bool UseGlobal, bool ArrayForm, 2947 Expr *Operand); 2948 2949 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 2950 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 2951 SourceLocation StmtLoc, 2952 bool ConvertToBoolean); 2953 2954 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 2955 Expr *Operand, SourceLocation RParen); 2956 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 2957 SourceLocation RParen); 2958 2959 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 2960 /// pseudo-functions. 2961 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 2962 SourceLocation KWLoc, 2963 ParsedType Ty, 2964 SourceLocation RParen); 2965 2966 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 2967 SourceLocation KWLoc, 2968 TypeSourceInfo *T, 2969 SourceLocation RParen); 2970 2971 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 2972 /// pseudo-functions. 2973 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 2974 SourceLocation KWLoc, 2975 ParsedType LhsTy, 2976 ParsedType RhsTy, 2977 SourceLocation RParen); 2978 2979 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 2980 SourceLocation KWLoc, 2981 TypeSourceInfo *LhsT, 2982 TypeSourceInfo *RhsT, 2983 SourceLocation RParen); 2984 2985 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 2986 /// pseudo-functions. 2987 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 2988 SourceLocation KWLoc, 2989 ParsedType LhsTy, 2990 Expr *DimExpr, 2991 SourceLocation RParen); 2992 2993 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 2994 SourceLocation KWLoc, 2995 TypeSourceInfo *TSInfo, 2996 Expr *DimExpr, 2997 SourceLocation RParen); 2998 2999 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3000 /// pseudo-functions. 3001 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3002 SourceLocation KWLoc, 3003 Expr *Queried, 3004 SourceLocation RParen); 3005 3006 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3007 SourceLocation KWLoc, 3008 Expr *Queried, 3009 SourceLocation RParen); 3010 3011 ExprResult ActOnStartCXXMemberReference(Scope *S, 3012 Expr *Base, 3013 SourceLocation OpLoc, 3014 tok::TokenKind OpKind, 3015 ParsedType &ObjectType, 3016 bool &MayBePseudoDestructor); 3017 3018 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3019 3020 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3021 SourceLocation OpLoc, 3022 tok::TokenKind OpKind, 3023 const CXXScopeSpec &SS, 3024 TypeSourceInfo *ScopeType, 3025 SourceLocation CCLoc, 3026 SourceLocation TildeLoc, 3027 PseudoDestructorTypeStorage DestroyedType, 3028 bool HasTrailingLParen); 3029 3030 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3031 SourceLocation OpLoc, 3032 tok::TokenKind OpKind, 3033 CXXScopeSpec &SS, 3034 UnqualifiedId &FirstTypeName, 3035 SourceLocation CCLoc, 3036 SourceLocation TildeLoc, 3037 UnqualifiedId &SecondTypeName, 3038 bool HasTrailingLParen); 3039 3040 /// MaybeCreateExprWithCleanups - If the current full-expression 3041 /// requires any cleanups, surround it with a ExprWithCleanups node. 3042 /// Otherwise, just returns the passed-in expression. 3043 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3044 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3045 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3046 3047 ExprResult ActOnFinishFullExpr(Expr *Expr); 3048 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3049 3050 // Marks SS invalid if it represents an incomplete type. 3051 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3052 3053 DeclContext *computeDeclContext(QualType T); 3054 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3055 bool EnteringContext = false); 3056 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3057 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3058 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3059 3060 /// \brief The parser has parsed a global nested-name-specifier '::'. 3061 /// 3062 /// \param S The scope in which this nested-name-specifier occurs. 3063 /// 3064 /// \param CCLoc The location of the '::'. 3065 /// 3066 /// \param SS The nested-name-specifier, which will be updated in-place 3067 /// to reflect the parsed nested-name-specifier. 3068 /// 3069 /// \returns true if an error occurred, false otherwise. 3070 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3071 CXXScopeSpec &SS); 3072 3073 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3074 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3075 3076 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3077 SourceLocation IdLoc, 3078 IdentifierInfo &II, 3079 ParsedType ObjectType); 3080 3081 bool BuildCXXNestedNameSpecifier(Scope *S, 3082 IdentifierInfo &Identifier, 3083 SourceLocation IdentifierLoc, 3084 SourceLocation CCLoc, 3085 QualType ObjectType, 3086 bool EnteringContext, 3087 CXXScopeSpec &SS, 3088 NamedDecl *ScopeLookupResult, 3089 bool ErrorRecoveryLookup); 3090 3091 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3092 /// 3093 /// \param S The scope in which this nested-name-specifier occurs. 3094 /// 3095 /// \param Identifier The identifier preceding the '::'. 3096 /// 3097 /// \param IdentifierLoc The location of the identifier. 3098 /// 3099 /// \param CCLoc The location of the '::'. 3100 /// 3101 /// \param ObjectType The type of the object, if we're parsing 3102 /// nested-name-specifier in a member access expression. 3103 /// 3104 /// \param EnteringContext Whether we're entering the context nominated by 3105 /// this nested-name-specifier. 3106 /// 3107 /// \param SS The nested-name-specifier, which is both an input 3108 /// parameter (the nested-name-specifier before this type) and an 3109 /// output parameter (containing the full nested-name-specifier, 3110 /// including this new type). 3111 /// 3112 /// \returns true if an error occurred, false otherwise. 3113 bool ActOnCXXNestedNameSpecifier(Scope *S, 3114 IdentifierInfo &Identifier, 3115 SourceLocation IdentifierLoc, 3116 SourceLocation CCLoc, 3117 ParsedType ObjectType, 3118 bool EnteringContext, 3119 CXXScopeSpec &SS); 3120 3121 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3122 IdentifierInfo &Identifier, 3123 SourceLocation IdentifierLoc, 3124 SourceLocation ColonLoc, 3125 ParsedType ObjectType, 3126 bool EnteringContext); 3127 3128 /// \brief The parser has parsed a nested-name-specifier 3129 /// 'template[opt] template-name < template-args >::'. 3130 /// 3131 /// \param S The scope in which this nested-name-specifier occurs. 3132 /// 3133 /// \param TemplateLoc The location of the 'template' keyword, if any. 3134 /// 3135 /// \param SS The nested-name-specifier, which is both an input 3136 /// parameter (the nested-name-specifier before this type) and an 3137 /// output parameter (containing the full nested-name-specifier, 3138 /// including this new type). 3139 /// 3140 /// \param TemplateLoc the location of the 'template' keyword, if any. 3141 /// \param TemplateName The template name. 3142 /// \param TemplateNameLoc The location of the template name. 3143 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3144 /// \param TemplateArgs The template arguments. 3145 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3146 /// \param CCLoc The location of the '::'. 3147 3148 /// \param EnteringContext Whether we're entering the context of the 3149 /// nested-name-specifier. 3150 /// 3151 /// 3152 /// \returns true if an error occurred, false otherwise. 3153 bool ActOnCXXNestedNameSpecifier(Scope *S, 3154 SourceLocation TemplateLoc, 3155 CXXScopeSpec &SS, 3156 TemplateTy Template, 3157 SourceLocation TemplateNameLoc, 3158 SourceLocation LAngleLoc, 3159 ASTTemplateArgsPtr TemplateArgs, 3160 SourceLocation RAngleLoc, 3161 SourceLocation CCLoc, 3162 bool EnteringContext); 3163 3164 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3165 /// that the parser can use later to reconstruct the given 3166 /// nested-name-specifier. 3167 /// 3168 /// \param SS A nested-name-specifier. 3169 /// 3170 /// \returns A pointer containing all of the information in the 3171 /// nested-name-specifier \p SS. 3172 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3173 3174 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3175 /// the nested-name-specifier structure. 3176 /// 3177 /// \param Annotation The annotation pointer, produced by 3178 /// \c SaveNestedNameSpecifierAnnotation(). 3179 /// 3180 /// \param AnnotationRange The source range corresponding to the annotation. 3181 /// 3182 /// \param SS The nested-name-specifier that will be updated with the contents 3183 /// of the annotation pointer. 3184 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3185 SourceRange AnnotationRange, 3186 CXXScopeSpec &SS); 3187 3188 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3189 3190 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3191 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3192 /// After this method is called, according to [C++ 3.4.3p3], names should be 3193 /// looked up in the declarator-id's scope, until the declarator is parsed and 3194 /// ActOnCXXExitDeclaratorScope is called. 3195 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3196 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3197 3198 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3199 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3200 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3201 /// Used to indicate that names should revert to being looked up in the 3202 /// defining scope. 3203 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3204 3205 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3206 /// initializer for the declaration 'Dcl'. 3207 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3208 /// static data member of class X, names should be looked up in the scope of 3209 /// class X. 3210 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3211 3212 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3213 /// initializer for the declaration 'Dcl'. 3214 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3215 3216 // ParseObjCStringLiteral - Parse Objective-C string literals. 3217 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3218 Expr **Strings, 3219 unsigned NumStrings); 3220 3221 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3222 TypeSourceInfo *EncodedTypeInfo, 3223 SourceLocation RParenLoc); 3224 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3225 CXXMethodDecl *Method); 3226 3227 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3228 SourceLocation EncodeLoc, 3229 SourceLocation LParenLoc, 3230 ParsedType Ty, 3231 SourceLocation RParenLoc); 3232 3233 // ParseObjCSelectorExpression - Build selector expression for @selector 3234 ExprResult ParseObjCSelectorExpression(Selector Sel, 3235 SourceLocation AtLoc, 3236 SourceLocation SelLoc, 3237 SourceLocation LParenLoc, 3238 SourceLocation RParenLoc); 3239 3240 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3241 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3242 SourceLocation AtLoc, 3243 SourceLocation ProtoLoc, 3244 SourceLocation LParenLoc, 3245 SourceLocation RParenLoc); 3246 3247 //===--------------------------------------------------------------------===// 3248 // C++ Declarations 3249 // 3250 Decl *ActOnStartLinkageSpecification(Scope *S, 3251 SourceLocation ExternLoc, 3252 SourceLocation LangLoc, 3253 llvm::StringRef Lang, 3254 SourceLocation LBraceLoc); 3255 Decl *ActOnFinishLinkageSpecification(Scope *S, 3256 Decl *LinkageSpec, 3257 SourceLocation RBraceLoc); 3258 3259 3260 //===--------------------------------------------------------------------===// 3261 // C++ Classes 3262 // 3263 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3264 const CXXScopeSpec *SS = 0); 3265 3266 Decl *ActOnAccessSpecifier(AccessSpecifier Access, 3267 SourceLocation ASLoc, 3268 SourceLocation ColonLoc); 3269 3270 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3271 Declarator &D, 3272 MultiTemplateParamsArg TemplateParameterLists, 3273 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3274 Expr *Init, bool HasDeferredInit, 3275 bool IsDefinition); 3276 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3277 Expr *Init); 3278 3279 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3280 Scope *S, 3281 CXXScopeSpec &SS, 3282 IdentifierInfo *MemberOrBase, 3283 ParsedType TemplateTypeTy, 3284 SourceLocation IdLoc, 3285 SourceLocation LParenLoc, 3286 Expr **Args, unsigned NumArgs, 3287 SourceLocation RParenLoc, 3288 SourceLocation EllipsisLoc); 3289 3290 MemInitResult BuildMemberInitializer(ValueDecl *Member, Expr **Args, 3291 unsigned NumArgs, SourceLocation IdLoc, 3292 SourceLocation LParenLoc, 3293 SourceLocation RParenLoc); 3294 3295 MemInitResult BuildBaseInitializer(QualType BaseType, 3296 TypeSourceInfo *BaseTInfo, 3297 Expr **Args, unsigned NumArgs, 3298 SourceLocation LParenLoc, 3299 SourceLocation RParenLoc, 3300 CXXRecordDecl *ClassDecl, 3301 SourceLocation EllipsisLoc); 3302 3303 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3304 Expr **Args, unsigned NumArgs, 3305 SourceLocation BaseLoc, 3306 SourceLocation RParenLoc, 3307 SourceLocation LParenLoc, 3308 CXXRecordDecl *ClassDecl); 3309 3310 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3311 CXXCtorInitializer *Initializer); 3312 3313 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3314 CXXCtorInitializer **Initializers, 3315 unsigned NumInitializers, bool AnyErrors); 3316 3317 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3318 3319 3320 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3321 /// mark all the non-trivial destructors of its members and bases as 3322 /// referenced. 3323 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3324 CXXRecordDecl *Record); 3325 3326 /// \brief The list of classes whose vtables have been used within 3327 /// this translation unit, and the source locations at which the 3328 /// first use occurred. 3329 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3330 3331 /// \brief The list of vtables that are required but have not yet been 3332 /// materialized. 3333 llvm::SmallVector<VTableUse, 16> VTableUses; 3334 3335 /// \brief The set of classes whose vtables have been used within 3336 /// this translation unit, and a bit that will be true if the vtable is 3337 /// required to be emitted (otherwise, it should be emitted only if needed 3338 /// by code generation). 3339 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3340 3341 /// \brief A list of all of the dynamic classes in this translation 3342 /// unit. 3343 llvm::SmallVector<CXXRecordDecl *, 16> DynamicClasses; 3344 3345 /// \brief Note that the vtable for the given class was used at the 3346 /// given location. 3347 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3348 bool DefinitionRequired = false); 3349 3350 /// MarkVirtualMembersReferenced - Will mark all members of the given 3351 /// CXXRecordDecl referenced. 3352 void MarkVirtualMembersReferenced(SourceLocation Loc, 3353 const CXXRecordDecl *RD); 3354 3355 /// \brief Define all of the vtables that have been used in this 3356 /// translation unit and reference any virtual members used by those 3357 /// vtables. 3358 /// 3359 /// \returns true if any work was done, false otherwise. 3360 bool DefineUsedVTables(); 3361 3362 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3363 3364 void ActOnMemInitializers(Decl *ConstructorDecl, 3365 SourceLocation ColonLoc, 3366 MemInitTy **MemInits, unsigned NumMemInits, 3367 bool AnyErrors); 3368 3369 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3370 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3371 Decl *TagDecl, 3372 SourceLocation LBrac, 3373 SourceLocation RBrac, 3374 AttributeList *AttrList); 3375 3376 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3377 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3378 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3379 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3380 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3381 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3382 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3383 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3384 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3385 bool IsInsideALocalClassWithinATemplateFunction(); 3386 3387 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3388 Expr *AssertExpr, 3389 Expr *AssertMessageExpr, 3390 SourceLocation RParenLoc); 3391 3392 FriendDecl *CheckFriendTypeDecl(SourceLocation FriendLoc, 3393 TypeSourceInfo *TSInfo); 3394 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3395 MultiTemplateParamsArg TemplateParams); 3396 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, bool IsDefinition, 3397 MultiTemplateParamsArg TemplateParams); 3398 3399 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3400 StorageClass& SC); 3401 void CheckConstructor(CXXConstructorDecl *Constructor); 3402 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3403 StorageClass& SC); 3404 bool CheckDestructor(CXXDestructorDecl *Destructor); 3405 void CheckConversionDeclarator(Declarator &D, QualType &R, 3406 StorageClass& SC); 3407 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3408 3409 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3410 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3411 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3412 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3413 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3414 3415 //===--------------------------------------------------------------------===// 3416 // C++ Derived Classes 3417 // 3418 3419 /// ActOnBaseSpecifier - Parsed a base specifier 3420 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3421 SourceRange SpecifierRange, 3422 bool Virtual, AccessSpecifier Access, 3423 TypeSourceInfo *TInfo, 3424 SourceLocation EllipsisLoc); 3425 3426 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3427 SourceRange SpecifierRange, 3428 bool Virtual, AccessSpecifier Access, 3429 ParsedType basetype, 3430 SourceLocation BaseLoc, 3431 SourceLocation EllipsisLoc); 3432 3433 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3434 unsigned NumBases); 3435 void ActOnBaseSpecifiers(Decl *ClassDecl, BaseTy **Bases, unsigned NumBases); 3436 3437 bool IsDerivedFrom(QualType Derived, QualType Base); 3438 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3439 3440 // FIXME: I don't like this name. 3441 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3442 3443 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3444 3445 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3446 SourceLocation Loc, SourceRange Range, 3447 CXXCastPath *BasePath = 0, 3448 bool IgnoreAccess = false); 3449 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3450 unsigned InaccessibleBaseID, 3451 unsigned AmbigiousBaseConvID, 3452 SourceLocation Loc, SourceRange Range, 3453 DeclarationName Name, 3454 CXXCastPath *BasePath); 3455 3456 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3457 3458 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3459 /// covariant, according to C++ [class.virtual]p5. 3460 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3461 const CXXMethodDecl *Old); 3462 3463 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3464 /// spec is a subset of base spec. 3465 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3466 const CXXMethodDecl *Old); 3467 3468 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3469 3470 /// CheckOverrideControl - Check C++0x override control semantics. 3471 void CheckOverrideControl(const Decl *D); 3472 3473 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3474 /// overrides a virtual member function marked 'final', according to 3475 /// C++0x [class.virtual]p3. 3476 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3477 const CXXMethodDecl *Old); 3478 3479 3480 //===--------------------------------------------------------------------===// 3481 // C++ Access Control 3482 // 3483 3484 enum AccessResult { 3485 AR_accessible, 3486 AR_inaccessible, 3487 AR_dependent, 3488 AR_delayed 3489 }; 3490 3491 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3492 NamedDecl *PrevMemberDecl, 3493 AccessSpecifier LexicalAS); 3494 3495 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3496 DeclAccessPair FoundDecl); 3497 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3498 DeclAccessPair FoundDecl); 3499 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3500 SourceRange PlacementRange, 3501 CXXRecordDecl *NamingClass, 3502 DeclAccessPair FoundDecl, 3503 bool Diagnose = true); 3504 AccessResult CheckConstructorAccess(SourceLocation Loc, 3505 CXXConstructorDecl *D, 3506 const InitializedEntity &Entity, 3507 AccessSpecifier Access, 3508 bool IsCopyBindingRefToTemp = false); 3509 AccessResult CheckConstructorAccess(SourceLocation Loc, 3510 CXXConstructorDecl *D, 3511 AccessSpecifier Access, 3512 PartialDiagnostic PD); 3513 AccessResult CheckDestructorAccess(SourceLocation Loc, 3514 CXXDestructorDecl *Dtor, 3515 const PartialDiagnostic &PDiag); 3516 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3517 NamedDecl *D, 3518 const PartialDiagnostic &PDiag); 3519 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3520 Expr *ObjectExpr, 3521 Expr *ArgExpr, 3522 DeclAccessPair FoundDecl); 3523 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3524 DeclAccessPair FoundDecl); 3525 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3526 QualType Base, QualType Derived, 3527 const CXXBasePath &Path, 3528 unsigned DiagID, 3529 bool ForceCheck = false, 3530 bool ForceUnprivileged = false); 3531 void CheckLookupAccess(const LookupResult &R); 3532 3533 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3534 const MultiLevelTemplateArgumentList &TemplateArgs); 3535 void PerformDependentDiagnostics(const DeclContext *Pattern, 3536 const MultiLevelTemplateArgumentList &TemplateArgs); 3537 3538 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3539 3540 /// A flag to suppress access checking. 3541 bool SuppressAccessChecking; 3542 3543 /// \brief When true, access checking violations are treated as SFINAE 3544 /// failures rather than hard errors. 3545 bool AccessCheckingSFINAE; 3546 3547 void ActOnStartSuppressingAccessChecks(); 3548 void ActOnStopSuppressingAccessChecks(); 3549 3550 enum AbstractDiagSelID { 3551 AbstractNone = -1, 3552 AbstractReturnType, 3553 AbstractParamType, 3554 AbstractVariableType, 3555 AbstractFieldType, 3556 AbstractArrayType 3557 }; 3558 3559 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3560 const PartialDiagnostic &PD); 3561 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3562 3563 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3564 AbstractDiagSelID SelID = AbstractNone); 3565 3566 //===--------------------------------------------------------------------===// 3567 // C++ Overloaded Operators [C++ 13.5] 3568 // 3569 3570 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3571 3572 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3573 3574 //===--------------------------------------------------------------------===// 3575 // C++ Templates [C++ 14] 3576 // 3577 void FilterAcceptableTemplateNames(LookupResult &R); 3578 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3579 3580 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3581 QualType ObjectType, bool EnteringContext, 3582 bool &MemberOfUnknownSpecialization); 3583 3584 TemplateNameKind isTemplateName(Scope *S, 3585 CXXScopeSpec &SS, 3586 bool hasTemplateKeyword, 3587 UnqualifiedId &Name, 3588 ParsedType ObjectType, 3589 bool EnteringContext, 3590 TemplateTy &Template, 3591 bool &MemberOfUnknownSpecialization); 3592 3593 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3594 SourceLocation IILoc, 3595 Scope *S, 3596 const CXXScopeSpec *SS, 3597 TemplateTy &SuggestedTemplate, 3598 TemplateNameKind &SuggestedKind); 3599 3600 bool DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3601 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3602 3603 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3604 SourceLocation EllipsisLoc, 3605 SourceLocation KeyLoc, 3606 IdentifierInfo *ParamName, 3607 SourceLocation ParamNameLoc, 3608 unsigned Depth, unsigned Position, 3609 SourceLocation EqualLoc, 3610 ParsedType DefaultArg); 3611 3612 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3613 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3614 unsigned Depth, 3615 unsigned Position, 3616 SourceLocation EqualLoc, 3617 Expr *DefaultArg); 3618 Decl *ActOnTemplateTemplateParameter(Scope *S, 3619 SourceLocation TmpLoc, 3620 TemplateParamsTy *Params, 3621 SourceLocation EllipsisLoc, 3622 IdentifierInfo *ParamName, 3623 SourceLocation ParamNameLoc, 3624 unsigned Depth, 3625 unsigned Position, 3626 SourceLocation EqualLoc, 3627 ParsedTemplateArgument DefaultArg); 3628 3629 TemplateParamsTy * 3630 ActOnTemplateParameterList(unsigned Depth, 3631 SourceLocation ExportLoc, 3632 SourceLocation TemplateLoc, 3633 SourceLocation LAngleLoc, 3634 Decl **Params, unsigned NumParams, 3635 SourceLocation RAngleLoc); 3636 3637 /// \brief The context in which we are checking a template parameter 3638 /// list. 3639 enum TemplateParamListContext { 3640 TPC_ClassTemplate, 3641 TPC_FunctionTemplate, 3642 TPC_ClassTemplateMember, 3643 TPC_FriendFunctionTemplate, 3644 TPC_FriendFunctionTemplateDefinition, 3645 TPC_TypeAliasTemplate 3646 }; 3647 3648 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3649 TemplateParameterList *OldParams, 3650 TemplateParamListContext TPC); 3651 TemplateParameterList * 3652 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3653 SourceLocation DeclLoc, 3654 const CXXScopeSpec &SS, 3655 TemplateParameterList **ParamLists, 3656 unsigned NumParamLists, 3657 bool IsFriend, 3658 bool &IsExplicitSpecialization, 3659 bool &Invalid); 3660 3661 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3662 SourceLocation KWLoc, CXXScopeSpec &SS, 3663 IdentifierInfo *Name, SourceLocation NameLoc, 3664 AttributeList *Attr, 3665 TemplateParameterList *TemplateParams, 3666 AccessSpecifier AS, 3667 unsigned NumOuterTemplateParamLists, 3668 TemplateParameterList **OuterTemplateParamLists); 3669 3670 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3671 TemplateArgumentListInfo &Out); 3672 3673 void NoteAllFoundTemplates(TemplateName Name); 3674 3675 QualType CheckTemplateIdType(TemplateName Template, 3676 SourceLocation TemplateLoc, 3677 TemplateArgumentListInfo &TemplateArgs); 3678 3679 TypeResult 3680 ActOnTemplateIdType(CXXScopeSpec &SS, 3681 TemplateTy Template, SourceLocation TemplateLoc, 3682 SourceLocation LAngleLoc, 3683 ASTTemplateArgsPtr TemplateArgs, 3684 SourceLocation RAngleLoc); 3685 3686 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3687 /// such as \c class T::template apply<U>. 3688 /// 3689 /// \param TUK 3690 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3691 TypeSpecifierType TagSpec, 3692 SourceLocation TagLoc, 3693 CXXScopeSpec &SS, 3694 TemplateTy TemplateD, 3695 SourceLocation TemplateLoc, 3696 SourceLocation LAngleLoc, 3697 ASTTemplateArgsPtr TemplateArgsIn, 3698 SourceLocation RAngleLoc); 3699 3700 3701 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3702 LookupResult &R, 3703 bool RequiresADL, 3704 const TemplateArgumentListInfo &TemplateArgs); 3705 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3706 const DeclarationNameInfo &NameInfo, 3707 const TemplateArgumentListInfo &TemplateArgs); 3708 3709 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3710 SourceLocation TemplateKWLoc, 3711 CXXScopeSpec &SS, 3712 UnqualifiedId &Name, 3713 ParsedType ObjectType, 3714 bool EnteringContext, 3715 TemplateTy &Template); 3716 3717 DeclResult 3718 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3719 SourceLocation KWLoc, 3720 CXXScopeSpec &SS, 3721 TemplateTy Template, 3722 SourceLocation TemplateNameLoc, 3723 SourceLocation LAngleLoc, 3724 ASTTemplateArgsPtr TemplateArgs, 3725 SourceLocation RAngleLoc, 3726 AttributeList *Attr, 3727 MultiTemplateParamsArg TemplateParameterLists); 3728 3729 Decl *ActOnTemplateDeclarator(Scope *S, 3730 MultiTemplateParamsArg TemplateParameterLists, 3731 Declarator &D); 3732 3733 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3734 MultiTemplateParamsArg TemplateParameterLists, 3735 Declarator &D); 3736 3737 bool 3738 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3739 TemplateSpecializationKind NewTSK, 3740 NamedDecl *PrevDecl, 3741 TemplateSpecializationKind PrevTSK, 3742 SourceLocation PrevPtOfInstantiation, 3743 bool &SuppressNew); 3744 3745 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3746 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3747 LookupResult &Previous); 3748 3749 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 3750 TemplateArgumentListInfo *ExplicitTemplateArgs, 3751 LookupResult &Previous); 3752 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 3753 3754 DeclResult 3755 ActOnExplicitInstantiation(Scope *S, 3756 SourceLocation ExternLoc, 3757 SourceLocation TemplateLoc, 3758 unsigned TagSpec, 3759 SourceLocation KWLoc, 3760 const CXXScopeSpec &SS, 3761 TemplateTy Template, 3762 SourceLocation TemplateNameLoc, 3763 SourceLocation LAngleLoc, 3764 ASTTemplateArgsPtr TemplateArgs, 3765 SourceLocation RAngleLoc, 3766 AttributeList *Attr); 3767 3768 DeclResult 3769 ActOnExplicitInstantiation(Scope *S, 3770 SourceLocation ExternLoc, 3771 SourceLocation TemplateLoc, 3772 unsigned TagSpec, 3773 SourceLocation KWLoc, 3774 CXXScopeSpec &SS, 3775 IdentifierInfo *Name, 3776 SourceLocation NameLoc, 3777 AttributeList *Attr); 3778 3779 DeclResult ActOnExplicitInstantiation(Scope *S, 3780 SourceLocation ExternLoc, 3781 SourceLocation TemplateLoc, 3782 Declarator &D); 3783 3784 TemplateArgumentLoc 3785 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 3786 SourceLocation TemplateLoc, 3787 SourceLocation RAngleLoc, 3788 Decl *Param, 3789 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3790 3791 /// \brief Specifies the context in which a particular template 3792 /// argument is being checked. 3793 enum CheckTemplateArgumentKind { 3794 /// \brief The template argument was specified in the code or was 3795 /// instantiated with some deduced template arguments. 3796 CTAK_Specified, 3797 3798 /// \brief The template argument was deduced via template argument 3799 /// deduction. 3800 CTAK_Deduced, 3801 3802 /// \brief The template argument was deduced from an array bound 3803 /// via template argument deduction. 3804 CTAK_DeducedFromArrayBound 3805 }; 3806 3807 bool CheckTemplateArgument(NamedDecl *Param, 3808 const TemplateArgumentLoc &Arg, 3809 NamedDecl *Template, 3810 SourceLocation TemplateLoc, 3811 SourceLocation RAngleLoc, 3812 unsigned ArgumentPackIndex, 3813 llvm::SmallVectorImpl<TemplateArgument> &Converted, 3814 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3815 3816 /// \brief Check that the given template arguments can be be provided to 3817 /// the given template, converting the arguments along the way. 3818 /// 3819 /// \param Template The template to which the template arguments are being 3820 /// provided. 3821 /// 3822 /// \param TemplateLoc The location of the template name in the source. 3823 /// 3824 /// \param TemplateArgs The list of template arguments. If the template is 3825 /// a template template parameter, this function may extend the set of 3826 /// template arguments to also include substituted, defaulted template 3827 /// arguments. 3828 /// 3829 /// \param PartialTemplateArgs True if the list of template arguments is 3830 /// intentionally partial, e.g., because we're checking just the initial 3831 /// set of template arguments. 3832 /// 3833 /// \param Converted Will receive the converted, canonicalized template 3834 /// arguments. 3835 /// 3836 /// \returns True if an error occurred, false otherwise. 3837 bool CheckTemplateArgumentList(TemplateDecl *Template, 3838 SourceLocation TemplateLoc, 3839 TemplateArgumentListInfo &TemplateArgs, 3840 bool PartialTemplateArgs, 3841 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3842 3843 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 3844 const TemplateArgumentLoc &Arg, 3845 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3846 3847 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 3848 TypeSourceInfo *Arg); 3849 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 3850 TemplateArgument &Converted); 3851 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 3852 QualType InstantiatedParamType, Expr *Arg, 3853 TemplateArgument &Converted, 3854 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3855 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 3856 const TemplateArgumentLoc &Arg); 3857 3858 ExprResult 3859 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 3860 QualType ParamType, 3861 SourceLocation Loc); 3862 ExprResult 3863 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 3864 SourceLocation Loc); 3865 3866 /// \brief Enumeration describing how template parameter lists are compared 3867 /// for equality. 3868 enum TemplateParameterListEqualKind { 3869 /// \brief We are matching the template parameter lists of two templates 3870 /// that might be redeclarations. 3871 /// 3872 /// \code 3873 /// template<typename T> struct X; 3874 /// template<typename T> struct X; 3875 /// \endcode 3876 TPL_TemplateMatch, 3877 3878 /// \brief We are matching the template parameter lists of two template 3879 /// template parameters as part of matching the template parameter lists 3880 /// of two templates that might be redeclarations. 3881 /// 3882 /// \code 3883 /// template<template<int I> class TT> struct X; 3884 /// template<template<int Value> class Other> struct X; 3885 /// \endcode 3886 TPL_TemplateTemplateParmMatch, 3887 3888 /// \brief We are matching the template parameter lists of a template 3889 /// template argument against the template parameter lists of a template 3890 /// template parameter. 3891 /// 3892 /// \code 3893 /// template<template<int Value> class Metafun> struct X; 3894 /// template<int Value> struct integer_c; 3895 /// X<integer_c> xic; 3896 /// \endcode 3897 TPL_TemplateTemplateArgumentMatch 3898 }; 3899 3900 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 3901 TemplateParameterList *Old, 3902 bool Complain, 3903 TemplateParameterListEqualKind Kind, 3904 SourceLocation TemplateArgLoc 3905 = SourceLocation()); 3906 3907 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 3908 3909 /// \brief Called when the parser has parsed a C++ typename 3910 /// specifier, e.g., "typename T::type". 3911 /// 3912 /// \param S The scope in which this typename type occurs. 3913 /// \param TypenameLoc the location of the 'typename' keyword 3914 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3915 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 3916 /// \param IdLoc the location of the identifier. 3917 TypeResult 3918 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3919 const CXXScopeSpec &SS, const IdentifierInfo &II, 3920 SourceLocation IdLoc); 3921 3922 /// \brief Called when the parser has parsed a C++ typename 3923 /// specifier that ends in a template-id, e.g., 3924 /// "typename MetaFun::template apply<T1, T2>". 3925 /// 3926 /// \param S The scope in which this typename type occurs. 3927 /// \param TypenameLoc the location of the 'typename' keyword 3928 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3929 /// \param TemplateLoc the location of the 'template' keyword, if any. 3930 /// \param TemplateName The template name. 3931 /// \param TemplateNameLoc The location of the template name. 3932 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3933 /// \param TemplateArgs The template arguments. 3934 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3935 TypeResult 3936 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3937 const CXXScopeSpec &SS, 3938 SourceLocation TemplateLoc, 3939 TemplateTy Template, 3940 SourceLocation TemplateNameLoc, 3941 SourceLocation LAngleLoc, 3942 ASTTemplateArgsPtr TemplateArgs, 3943 SourceLocation RAngleLoc); 3944 3945 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 3946 SourceLocation KeywordLoc, 3947 NestedNameSpecifierLoc QualifierLoc, 3948 const IdentifierInfo &II, 3949 SourceLocation IILoc); 3950 3951 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 3952 SourceLocation Loc, 3953 DeclarationName Name); 3954 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 3955 3956 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 3957 3958 std::string 3959 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3960 const TemplateArgumentList &Args); 3961 3962 std::string 3963 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3964 const TemplateArgument *Args, 3965 unsigned NumArgs); 3966 3967 //===--------------------------------------------------------------------===// 3968 // C++ Variadic Templates (C++0x [temp.variadic]) 3969 //===--------------------------------------------------------------------===// 3970 3971 /// \brief The context in which an unexpanded parameter pack is 3972 /// being diagnosed. 3973 /// 3974 /// Note that the values of this enumeration line up with the first 3975 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 3976 enum UnexpandedParameterPackContext { 3977 /// \brief An arbitrary expression. 3978 UPPC_Expression = 0, 3979 3980 /// \brief The base type of a class type. 3981 UPPC_BaseType, 3982 3983 /// \brief The type of an arbitrary declaration. 3984 UPPC_DeclarationType, 3985 3986 /// \brief The type of a data member. 3987 UPPC_DataMemberType, 3988 3989 /// \brief The size of a bit-field. 3990 UPPC_BitFieldWidth, 3991 3992 /// \brief The expression in a static assertion. 3993 UPPC_StaticAssertExpression, 3994 3995 /// \brief The fixed underlying type of an enumeration. 3996 UPPC_FixedUnderlyingType, 3997 3998 /// \brief The enumerator value. 3999 UPPC_EnumeratorValue, 4000 4001 /// \brief A using declaration. 4002 UPPC_UsingDeclaration, 4003 4004 /// \brief A friend declaration. 4005 UPPC_FriendDeclaration, 4006 4007 /// \brief A declaration qualifier. 4008 UPPC_DeclarationQualifier, 4009 4010 /// \brief An initializer. 4011 UPPC_Initializer, 4012 4013 /// \brief A default argument. 4014 UPPC_DefaultArgument, 4015 4016 /// \brief The type of a non-type template parameter. 4017 UPPC_NonTypeTemplateParameterType, 4018 4019 /// \brief The type of an exception. 4020 UPPC_ExceptionType, 4021 4022 /// \brief Partial specialization. 4023 UPPC_PartialSpecialization 4024 }; 4025 4026 /// \brief If the given type contains an unexpanded parameter pack, 4027 /// diagnose the error. 4028 /// 4029 /// \param Loc The source location where a diagnostc should be emitted. 4030 /// 4031 /// \param T The type that is being checked for unexpanded parameter 4032 /// packs. 4033 /// 4034 /// \returns true if an error occurred, false otherwise. 4035 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4036 UnexpandedParameterPackContext UPPC); 4037 4038 /// \brief If the given expression contains an unexpanded parameter 4039 /// pack, diagnose the error. 4040 /// 4041 /// \param E The expression that is being checked for unexpanded 4042 /// parameter packs. 4043 /// 4044 /// \returns true if an error occurred, false otherwise. 4045 bool DiagnoseUnexpandedParameterPack(Expr *E, 4046 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4047 4048 /// \brief If the given nested-name-specifier contains an unexpanded 4049 /// parameter pack, diagnose the error. 4050 /// 4051 /// \param SS The nested-name-specifier that is being checked for 4052 /// unexpanded parameter packs. 4053 /// 4054 /// \returns true if an error occurred, false otherwise. 4055 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4056 UnexpandedParameterPackContext UPPC); 4057 4058 /// \brief If the given name contains an unexpanded parameter pack, 4059 /// diagnose the error. 4060 /// 4061 /// \param NameInfo The name (with source location information) that 4062 /// is being checked for unexpanded parameter packs. 4063 /// 4064 /// \returns true if an error occurred, false otherwise. 4065 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4066 UnexpandedParameterPackContext UPPC); 4067 4068 /// \brief If the given template name contains an unexpanded parameter pack, 4069 /// diagnose the error. 4070 /// 4071 /// \param Loc The location of the template name. 4072 /// 4073 /// \param Template The template name that is being checked for unexpanded 4074 /// parameter packs. 4075 /// 4076 /// \returns true if an error occurred, false otherwise. 4077 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4078 TemplateName Template, 4079 UnexpandedParameterPackContext UPPC); 4080 4081 /// \brief If the given template argument contains an unexpanded parameter 4082 /// pack, diagnose the error. 4083 /// 4084 /// \param Arg The template argument that is being checked for unexpanded 4085 /// parameter packs. 4086 /// 4087 /// \returns true if an error occurred, false otherwise. 4088 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4089 UnexpandedParameterPackContext UPPC); 4090 4091 /// \brief Collect the set of unexpanded parameter packs within the given 4092 /// template argument. 4093 /// 4094 /// \param Arg The template argument that will be traversed to find 4095 /// unexpanded parameter packs. 4096 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4097 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4098 4099 /// \brief Collect the set of unexpanded parameter packs within the given 4100 /// template argument. 4101 /// 4102 /// \param Arg The template argument that will be traversed to find 4103 /// unexpanded parameter packs. 4104 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4105 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4106 4107 /// \brief Collect the set of unexpanded parameter packs within the given 4108 /// type. 4109 /// 4110 /// \param T The type that will be traversed to find 4111 /// unexpanded parameter packs. 4112 void collectUnexpandedParameterPacks(QualType T, 4113 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4114 4115 /// \brief Collect the set of unexpanded parameter packs within the given 4116 /// type. 4117 /// 4118 /// \param TL The type that will be traversed to find 4119 /// unexpanded parameter packs. 4120 void collectUnexpandedParameterPacks(TypeLoc TL, 4121 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4122 4123 /// \brief Invoked when parsing a template argument followed by an 4124 /// ellipsis, which creates a pack expansion. 4125 /// 4126 /// \param Arg The template argument preceding the ellipsis, which 4127 /// may already be invalid. 4128 /// 4129 /// \param EllipsisLoc The location of the ellipsis. 4130 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4131 SourceLocation EllipsisLoc); 4132 4133 /// \brief Invoked when parsing a type followed by an ellipsis, which 4134 /// creates a pack expansion. 4135 /// 4136 /// \param Type The type preceding the ellipsis, which will become 4137 /// the pattern of the pack expansion. 4138 /// 4139 /// \param EllipsisLoc The location of the ellipsis. 4140 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4141 4142 /// \brief Construct a pack expansion type from the pattern of the pack 4143 /// expansion. 4144 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4145 SourceLocation EllipsisLoc, 4146 llvm::Optional<unsigned> NumExpansions); 4147 4148 /// \brief Construct a pack expansion type from the pattern of the pack 4149 /// expansion. 4150 QualType CheckPackExpansion(QualType Pattern, 4151 SourceRange PatternRange, 4152 SourceLocation EllipsisLoc, 4153 llvm::Optional<unsigned> NumExpansions); 4154 4155 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4156 /// creates a pack expansion. 4157 /// 4158 /// \param Pattern The expression preceding the ellipsis, which will become 4159 /// the pattern of the pack expansion. 4160 /// 4161 /// \param EllipsisLoc The location of the ellipsis. 4162 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4163 4164 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4165 /// creates a pack expansion. 4166 /// 4167 /// \param Pattern The expression preceding the ellipsis, which will become 4168 /// the pattern of the pack expansion. 4169 /// 4170 /// \param EllipsisLoc The location of the ellipsis. 4171 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4172 llvm::Optional<unsigned> NumExpansions); 4173 4174 /// \brief Determine whether we could expand a pack expansion with the 4175 /// given set of parameter packs into separate arguments by repeatedly 4176 /// transforming the pattern. 4177 /// 4178 /// \param EllipsisLoc The location of the ellipsis that identifies the 4179 /// pack expansion. 4180 /// 4181 /// \param PatternRange The source range that covers the entire pattern of 4182 /// the pack expansion. 4183 /// 4184 /// \param Unexpanded The set of unexpanded parameter packs within the 4185 /// pattern. 4186 /// 4187 /// \param NumUnexpanded The number of unexpanded parameter packs in 4188 /// \p Unexpanded. 4189 /// 4190 /// \param ShouldExpand Will be set to \c true if the transformer should 4191 /// expand the corresponding pack expansions into separate arguments. When 4192 /// set, \c NumExpansions must also be set. 4193 /// 4194 /// \param RetainExpansion Whether the caller should add an unexpanded 4195 /// pack expansion after all of the expanded arguments. This is used 4196 /// when extending explicitly-specified template argument packs per 4197 /// C++0x [temp.arg.explicit]p9. 4198 /// 4199 /// \param NumExpansions The number of separate arguments that will be in 4200 /// the expanded form of the corresponding pack expansion. This is both an 4201 /// input and an output parameter, which can be set by the caller if the 4202 /// number of expansions is known a priori (e.g., due to a prior substitution) 4203 /// and will be set by the callee when the number of expansions is known. 4204 /// The callee must set this value when \c ShouldExpand is \c true; it may 4205 /// set this value in other cases. 4206 /// 4207 /// \returns true if an error occurred (e.g., because the parameter packs 4208 /// are to be instantiated with arguments of different lengths), false 4209 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4210 /// must be set. 4211 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4212 SourceRange PatternRange, 4213 const UnexpandedParameterPack *Unexpanded, 4214 unsigned NumUnexpanded, 4215 const MultiLevelTemplateArgumentList &TemplateArgs, 4216 bool &ShouldExpand, 4217 bool &RetainExpansion, 4218 llvm::Optional<unsigned> &NumExpansions); 4219 4220 /// \brief Determine the number of arguments in the given pack expansion 4221 /// type. 4222 /// 4223 /// This routine already assumes that the pack expansion type can be 4224 /// expanded and that the number of arguments in the expansion is 4225 /// consistent across all of the unexpanded parameter packs in its pattern. 4226 unsigned getNumArgumentsInExpansion(QualType T, 4227 const MultiLevelTemplateArgumentList &TemplateArgs); 4228 4229 /// \brief Determine whether the given declarator contains any unexpanded 4230 /// parameter packs. 4231 /// 4232 /// This routine is used by the parser to disambiguate function declarators 4233 /// with an ellipsis prior to the ')', e.g., 4234 /// 4235 /// \code 4236 /// void f(T...); 4237 /// \endcode 4238 /// 4239 /// To determine whether we have an (unnamed) function parameter pack or 4240 /// a variadic function. 4241 /// 4242 /// \returns true if the declarator contains any unexpanded parameter packs, 4243 /// false otherwise. 4244 bool containsUnexpandedParameterPacks(Declarator &D); 4245 4246 //===--------------------------------------------------------------------===// 4247 // C++ Template Argument Deduction (C++ [temp.deduct]) 4248 //===--------------------------------------------------------------------===// 4249 4250 /// \brief Describes the result of template argument deduction. 4251 /// 4252 /// The TemplateDeductionResult enumeration describes the result of 4253 /// template argument deduction, as returned from 4254 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4255 /// structure provides additional information about the results of 4256 /// template argument deduction, e.g., the deduced template argument 4257 /// list (if successful) or the specific template parameters or 4258 /// deduced arguments that were involved in the failure. 4259 enum TemplateDeductionResult { 4260 /// \brief Template argument deduction was successful. 4261 TDK_Success = 0, 4262 /// \brief Template argument deduction exceeded the maximum template 4263 /// instantiation depth (which has already been diagnosed). 4264 TDK_InstantiationDepth, 4265 /// \brief Template argument deduction did not deduce a value 4266 /// for every template parameter. 4267 TDK_Incomplete, 4268 /// \brief Template argument deduction produced inconsistent 4269 /// deduced values for the given template parameter. 4270 TDK_Inconsistent, 4271 /// \brief Template argument deduction failed due to inconsistent 4272 /// cv-qualifiers on a template parameter type that would 4273 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4274 /// but were given a non-const "X". 4275 TDK_Underqualified, 4276 /// \brief Substitution of the deduced template argument values 4277 /// resulted in an error. 4278 TDK_SubstitutionFailure, 4279 /// \brief Substitution of the deduced template argument values 4280 /// into a non-deduced context produced a type or value that 4281 /// produces a type that does not match the original template 4282 /// arguments provided. 4283 TDK_NonDeducedMismatch, 4284 /// \brief When performing template argument deduction for a function 4285 /// template, there were too many call arguments. 4286 TDK_TooManyArguments, 4287 /// \brief When performing template argument deduction for a function 4288 /// template, there were too few call arguments. 4289 TDK_TooFewArguments, 4290 /// \brief The explicitly-specified template arguments were not valid 4291 /// template arguments for the given template. 4292 TDK_InvalidExplicitArguments, 4293 /// \brief The arguments included an overloaded function name that could 4294 /// not be resolved to a suitable function. 4295 TDK_FailedOverloadResolution 4296 }; 4297 4298 TemplateDeductionResult 4299 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4300 const TemplateArgumentList &TemplateArgs, 4301 sema::TemplateDeductionInfo &Info); 4302 4303 TemplateDeductionResult 4304 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4305 TemplateArgumentListInfo &ExplicitTemplateArgs, 4306 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4307 llvm::SmallVectorImpl<QualType> &ParamTypes, 4308 QualType *FunctionType, 4309 sema::TemplateDeductionInfo &Info); 4310 4311 /// brief A function argument from which we performed template argument 4312 // deduction for a call. 4313 struct OriginalCallArg { 4314 OriginalCallArg(QualType OriginalParamType, 4315 unsigned ArgIdx, 4316 QualType OriginalArgType) 4317 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4318 OriginalArgType(OriginalArgType) { } 4319 4320 QualType OriginalParamType; 4321 unsigned ArgIdx; 4322 QualType OriginalArgType; 4323 }; 4324 4325 TemplateDeductionResult 4326 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4327 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4328 unsigned NumExplicitlySpecified, 4329 FunctionDecl *&Specialization, 4330 sema::TemplateDeductionInfo &Info, 4331 llvm::SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4332 4333 TemplateDeductionResult 4334 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4335 TemplateArgumentListInfo *ExplicitTemplateArgs, 4336 Expr **Args, unsigned NumArgs, 4337 FunctionDecl *&Specialization, 4338 sema::TemplateDeductionInfo &Info); 4339 4340 TemplateDeductionResult 4341 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4342 TemplateArgumentListInfo *ExplicitTemplateArgs, 4343 QualType ArgFunctionType, 4344 FunctionDecl *&Specialization, 4345 sema::TemplateDeductionInfo &Info); 4346 4347 TemplateDeductionResult 4348 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4349 QualType ToType, 4350 CXXConversionDecl *&Specialization, 4351 sema::TemplateDeductionInfo &Info); 4352 4353 TemplateDeductionResult 4354 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4355 TemplateArgumentListInfo *ExplicitTemplateArgs, 4356 FunctionDecl *&Specialization, 4357 sema::TemplateDeductionInfo &Info); 4358 4359 bool DeduceAutoType(TypeSourceInfo *AutoType, Expr *Initializer, 4360 TypeSourceInfo *&Result); 4361 4362 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4363 FunctionTemplateDecl *FT2, 4364 SourceLocation Loc, 4365 TemplatePartialOrderingContext TPOC, 4366 unsigned NumCallArguments); 4367 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4368 UnresolvedSetIterator SEnd, 4369 TemplatePartialOrderingContext TPOC, 4370 unsigned NumCallArguments, 4371 SourceLocation Loc, 4372 const PartialDiagnostic &NoneDiag, 4373 const PartialDiagnostic &AmbigDiag, 4374 const PartialDiagnostic &CandidateDiag, 4375 bool Complain = true); 4376 4377 ClassTemplatePartialSpecializationDecl * 4378 getMoreSpecializedPartialSpecialization( 4379 ClassTemplatePartialSpecializationDecl *PS1, 4380 ClassTemplatePartialSpecializationDecl *PS2, 4381 SourceLocation Loc); 4382 4383 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4384 bool OnlyDeduced, 4385 unsigned Depth, 4386 llvm::SmallVectorImpl<bool> &Used); 4387 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4388 llvm::SmallVectorImpl<bool> &Deduced); 4389 4390 //===--------------------------------------------------------------------===// 4391 // C++ Template Instantiation 4392 // 4393 4394 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4395 const TemplateArgumentList *Innermost = 0, 4396 bool RelativeToPrimary = false, 4397 const FunctionDecl *Pattern = 0); 4398 4399 /// \brief A template instantiation that is currently in progress. 4400 struct ActiveTemplateInstantiation { 4401 /// \brief The kind of template instantiation we are performing 4402 enum InstantiationKind { 4403 /// We are instantiating a template declaration. The entity is 4404 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4405 TemplateInstantiation, 4406 4407 /// We are instantiating a default argument for a template 4408 /// parameter. The Entity is the template, and 4409 /// TemplateArgs/NumTemplateArguments provides the template 4410 /// arguments as specified. 4411 /// FIXME: Use a TemplateArgumentList 4412 DefaultTemplateArgumentInstantiation, 4413 4414 /// We are instantiating a default argument for a function. 4415 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4416 /// provides the template arguments as specified. 4417 DefaultFunctionArgumentInstantiation, 4418 4419 /// We are substituting explicit template arguments provided for 4420 /// a function template. The entity is a FunctionTemplateDecl. 4421 ExplicitTemplateArgumentSubstitution, 4422 4423 /// We are substituting template argument determined as part of 4424 /// template argument deduction for either a class template 4425 /// partial specialization or a function template. The 4426 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4427 /// a FunctionTemplateDecl. 4428 DeducedTemplateArgumentSubstitution, 4429 4430 /// We are substituting prior template arguments into a new 4431 /// template parameter. The template parameter itself is either a 4432 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4433 PriorTemplateArgumentSubstitution, 4434 4435 /// We are checking the validity of a default template argument that 4436 /// has been used when naming a template-id. 4437 DefaultTemplateArgumentChecking 4438 } Kind; 4439 4440 /// \brief The point of instantiation within the source code. 4441 SourceLocation PointOfInstantiation; 4442 4443 /// \brief The template (or partial specialization) in which we are 4444 /// performing the instantiation, for substitutions of prior template 4445 /// arguments. 4446 NamedDecl *Template; 4447 4448 /// \brief The entity that is being instantiated. 4449 uintptr_t Entity; 4450 4451 /// \brief The list of template arguments we are substituting, if they 4452 /// are not part of the entity. 4453 const TemplateArgument *TemplateArgs; 4454 4455 /// \brief The number of template arguments in TemplateArgs. 4456 unsigned NumTemplateArgs; 4457 4458 /// \brief The template deduction info object associated with the 4459 /// substitution or checking of explicit or deduced template arguments. 4460 sema::TemplateDeductionInfo *DeductionInfo; 4461 4462 /// \brief The source range that covers the construct that cause 4463 /// the instantiation, e.g., the template-id that causes a class 4464 /// template instantiation. 4465 SourceRange InstantiationRange; 4466 4467 ActiveTemplateInstantiation() 4468 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4469 NumTemplateArgs(0), DeductionInfo(0) {} 4470 4471 /// \brief Determines whether this template is an actual instantiation 4472 /// that should be counted toward the maximum instantiation depth. 4473 bool isInstantiationRecord() const; 4474 4475 friend bool operator==(const ActiveTemplateInstantiation &X, 4476 const ActiveTemplateInstantiation &Y) { 4477 if (X.Kind != Y.Kind) 4478 return false; 4479 4480 if (X.Entity != Y.Entity) 4481 return false; 4482 4483 switch (X.Kind) { 4484 case TemplateInstantiation: 4485 return true; 4486 4487 case PriorTemplateArgumentSubstitution: 4488 case DefaultTemplateArgumentChecking: 4489 if (X.Template != Y.Template) 4490 return false; 4491 4492 // Fall through 4493 4494 case DefaultTemplateArgumentInstantiation: 4495 case ExplicitTemplateArgumentSubstitution: 4496 case DeducedTemplateArgumentSubstitution: 4497 case DefaultFunctionArgumentInstantiation: 4498 return X.TemplateArgs == Y.TemplateArgs; 4499 4500 } 4501 4502 return true; 4503 } 4504 4505 friend bool operator!=(const ActiveTemplateInstantiation &X, 4506 const ActiveTemplateInstantiation &Y) { 4507 return !(X == Y); 4508 } 4509 }; 4510 4511 /// \brief List of active template instantiations. 4512 /// 4513 /// This vector is treated as a stack. As one template instantiation 4514 /// requires another template instantiation, additional 4515 /// instantiations are pushed onto the stack up to a 4516 /// user-configurable limit LangOptions::InstantiationDepth. 4517 llvm::SmallVector<ActiveTemplateInstantiation, 16> 4518 ActiveTemplateInstantiations; 4519 4520 /// \brief Whether we are in a SFINAE context that is not associated with 4521 /// template instantiation. 4522 /// 4523 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4524 /// of a template instantiation or template argument deduction. 4525 bool InNonInstantiationSFINAEContext; 4526 4527 /// \brief The number of ActiveTemplateInstantiation entries in 4528 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4529 /// therefore, should not be counted as part of the instantiation depth. 4530 unsigned NonInstantiationEntries; 4531 4532 /// \brief The last template from which a template instantiation 4533 /// error or warning was produced. 4534 /// 4535 /// This value is used to suppress printing of redundant template 4536 /// instantiation backtraces when there are multiple errors in the 4537 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4538 /// to implement it anywhere else. 4539 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4540 4541 /// \brief The current index into pack expansion arguments that will be 4542 /// used for substitution of parameter packs. 4543 /// 4544 /// The pack expansion index will be -1 to indicate that parameter packs 4545 /// should be instantiated as themselves. Otherwise, the index specifies 4546 /// which argument within the parameter pack will be used for substitution. 4547 int ArgumentPackSubstitutionIndex; 4548 4549 /// \brief RAII object used to change the argument pack substitution index 4550 /// within a \c Sema object. 4551 /// 4552 /// See \c ArgumentPackSubstitutionIndex for more information. 4553 class ArgumentPackSubstitutionIndexRAII { 4554 Sema &Self; 4555 int OldSubstitutionIndex; 4556 4557 public: 4558 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4559 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4560 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4561 } 4562 4563 ~ArgumentPackSubstitutionIndexRAII() { 4564 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4565 } 4566 }; 4567 4568 friend class ArgumentPackSubstitutionRAII; 4569 4570 /// \brief The stack of calls expression undergoing template instantiation. 4571 /// 4572 /// The top of this stack is used by a fixit instantiating unresolved 4573 /// function calls to fix the AST to match the textual change it prints. 4574 llvm::SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4575 4576 /// \brief For each declaration that involved template argument deduction, the 4577 /// set of diagnostics that were suppressed during that template argument 4578 /// deduction. 4579 /// 4580 /// FIXME: Serialize this structure to the AST file. 4581 llvm::DenseMap<Decl *, llvm::SmallVector<PartialDiagnosticAt, 1> > 4582 SuppressedDiagnostics; 4583 4584 /// \brief A stack object to be created when performing template 4585 /// instantiation. 4586 /// 4587 /// Construction of an object of type \c InstantiatingTemplate 4588 /// pushes the current instantiation onto the stack of active 4589 /// instantiations. If the size of this stack exceeds the maximum 4590 /// number of recursive template instantiations, construction 4591 /// produces an error and evaluates true. 4592 /// 4593 /// Destruction of this object will pop the named instantiation off 4594 /// the stack. 4595 struct InstantiatingTemplate { 4596 /// \brief Note that we are instantiating a class template, 4597 /// function template, or a member thereof. 4598 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4599 Decl *Entity, 4600 SourceRange InstantiationRange = SourceRange()); 4601 4602 /// \brief Note that we are instantiating a default argument in a 4603 /// template-id. 4604 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4605 TemplateDecl *Template, 4606 const TemplateArgument *TemplateArgs, 4607 unsigned NumTemplateArgs, 4608 SourceRange InstantiationRange = SourceRange()); 4609 4610 /// \brief Note that we are instantiating a default argument in a 4611 /// template-id. 4612 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4613 FunctionTemplateDecl *FunctionTemplate, 4614 const TemplateArgument *TemplateArgs, 4615 unsigned NumTemplateArgs, 4616 ActiveTemplateInstantiation::InstantiationKind Kind, 4617 sema::TemplateDeductionInfo &DeductionInfo, 4618 SourceRange InstantiationRange = SourceRange()); 4619 4620 /// \brief Note that we are instantiating as part of template 4621 /// argument deduction for a class template partial 4622 /// specialization. 4623 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4624 ClassTemplatePartialSpecializationDecl *PartialSpec, 4625 const TemplateArgument *TemplateArgs, 4626 unsigned NumTemplateArgs, 4627 sema::TemplateDeductionInfo &DeductionInfo, 4628 SourceRange InstantiationRange = SourceRange()); 4629 4630 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4631 ParmVarDecl *Param, 4632 const TemplateArgument *TemplateArgs, 4633 unsigned NumTemplateArgs, 4634 SourceRange InstantiationRange = SourceRange()); 4635 4636 /// \brief Note that we are substituting prior template arguments into a 4637 /// non-type or template template parameter. 4638 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4639 NamedDecl *Template, 4640 NonTypeTemplateParmDecl *Param, 4641 const TemplateArgument *TemplateArgs, 4642 unsigned NumTemplateArgs, 4643 SourceRange InstantiationRange); 4644 4645 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4646 NamedDecl *Template, 4647 TemplateTemplateParmDecl *Param, 4648 const TemplateArgument *TemplateArgs, 4649 unsigned NumTemplateArgs, 4650 SourceRange InstantiationRange); 4651 4652 /// \brief Note that we are checking the default template argument 4653 /// against the template parameter for a given template-id. 4654 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4655 TemplateDecl *Template, 4656 NamedDecl *Param, 4657 const TemplateArgument *TemplateArgs, 4658 unsigned NumTemplateArgs, 4659 SourceRange InstantiationRange); 4660 4661 4662 /// \brief Note that we have finished instantiating this template. 4663 void Clear(); 4664 4665 ~InstantiatingTemplate() { Clear(); } 4666 4667 /// \brief Determines whether we have exceeded the maximum 4668 /// recursive template instantiations. 4669 operator bool() const { return Invalid; } 4670 4671 private: 4672 Sema &SemaRef; 4673 bool Invalid; 4674 bool SavedInNonInstantiationSFINAEContext; 4675 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4676 SourceRange InstantiationRange); 4677 4678 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4679 4680 InstantiatingTemplate& 4681 operator=(const InstantiatingTemplate&); // not implemented 4682 }; 4683 4684 void PrintInstantiationStack(); 4685 4686 /// \brief Determines whether we are currently in a context where 4687 /// template argument substitution failures are not considered 4688 /// errors. 4689 /// 4690 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4691 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4692 /// template-deduction context object, which can be used to capture 4693 /// diagnostics that will be suppressed. 4694 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4695 4696 /// \brief RAII class used to determine whether SFINAE has 4697 /// trapped any errors that occur during template argument 4698 /// deduction.` 4699 class SFINAETrap { 4700 Sema &SemaRef; 4701 unsigned PrevSFINAEErrors; 4702 bool PrevInNonInstantiationSFINAEContext; 4703 bool PrevAccessCheckingSFINAE; 4704 4705 public: 4706 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 4707 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 4708 PrevInNonInstantiationSFINAEContext( 4709 SemaRef.InNonInstantiationSFINAEContext), 4710 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 4711 { 4712 if (!SemaRef.isSFINAEContext()) 4713 SemaRef.InNonInstantiationSFINAEContext = true; 4714 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 4715 } 4716 4717 ~SFINAETrap() { 4718 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 4719 SemaRef.InNonInstantiationSFINAEContext 4720 = PrevInNonInstantiationSFINAEContext; 4721 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 4722 } 4723 4724 /// \brief Determine whether any SFINAE errors have been trapped. 4725 bool hasErrorOccurred() const { 4726 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 4727 } 4728 }; 4729 4730 /// \brief The current instantiation scope used to store local 4731 /// variables. 4732 LocalInstantiationScope *CurrentInstantiationScope; 4733 4734 /// \brief The number of typos corrected by CorrectTypo. 4735 unsigned TyposCorrected; 4736 4737 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 4738 UnqualifiedTyposCorrectedMap; 4739 4740 /// \brief A cache containing the results of typo correction for unqualified 4741 /// name lookup. 4742 /// 4743 /// The string is the string that we corrected to (which may be empty, if 4744 /// there was no correction), while the boolean will be true when the 4745 /// string represents a keyword. 4746 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 4747 4748 /// \brief Worker object for performing CFG-based warnings. 4749 sema::AnalysisBasedWarnings AnalysisWarnings; 4750 4751 /// \brief An entity for which implicit template instantiation is required. 4752 /// 4753 /// The source location associated with the declaration is the first place in 4754 /// the source code where the declaration was "used". It is not necessarily 4755 /// the point of instantiation (which will be either before or after the 4756 /// namespace-scope declaration that triggered this implicit instantiation), 4757 /// However, it is the location that diagnostics should generally refer to, 4758 /// because users will need to know what code triggered the instantiation. 4759 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 4760 4761 /// \brief The queue of implicit template instantiations that are required 4762 /// but have not yet been performed. 4763 std::deque<PendingImplicitInstantiation> PendingInstantiations; 4764 4765 /// \brief The queue of implicit template instantiations that are required 4766 /// and must be performed within the current local scope. 4767 /// 4768 /// This queue is only used for member functions of local classes in 4769 /// templates, which must be instantiated in the same scope as their 4770 /// enclosing function, so that they can reference function-local 4771 /// types, static variables, enumerators, etc. 4772 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 4773 4774 void PerformPendingInstantiations(bool LocalOnly = false); 4775 4776 TypeSourceInfo *SubstType(TypeSourceInfo *T, 4777 const MultiLevelTemplateArgumentList &TemplateArgs, 4778 SourceLocation Loc, DeclarationName Entity); 4779 4780 QualType SubstType(QualType T, 4781 const MultiLevelTemplateArgumentList &TemplateArgs, 4782 SourceLocation Loc, DeclarationName Entity); 4783 4784 TypeSourceInfo *SubstType(TypeLoc TL, 4785 const MultiLevelTemplateArgumentList &TemplateArgs, 4786 SourceLocation Loc, DeclarationName Entity); 4787 4788 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 4789 const MultiLevelTemplateArgumentList &TemplateArgs, 4790 SourceLocation Loc, 4791 DeclarationName Entity); 4792 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 4793 const MultiLevelTemplateArgumentList &TemplateArgs, 4794 int indexAdjustment, 4795 llvm::Optional<unsigned> NumExpansions); 4796 bool SubstParmTypes(SourceLocation Loc, 4797 ParmVarDecl **Params, unsigned NumParams, 4798 const MultiLevelTemplateArgumentList &TemplateArgs, 4799 llvm::SmallVectorImpl<QualType> &ParamTypes, 4800 llvm::SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 4801 ExprResult SubstExpr(Expr *E, 4802 const MultiLevelTemplateArgumentList &TemplateArgs); 4803 4804 /// \brief Substitute the given template arguments into a list of 4805 /// expressions, expanding pack expansions if required. 4806 /// 4807 /// \param Exprs The list of expressions to substitute into. 4808 /// 4809 /// \param NumExprs The number of expressions in \p Exprs. 4810 /// 4811 /// \param IsCall Whether this is some form of call, in which case 4812 /// default arguments will be dropped. 4813 /// 4814 /// \param TemplateArgs The set of template arguments to substitute. 4815 /// 4816 /// \param Outputs Will receive all of the substituted arguments. 4817 /// 4818 /// \returns true if an error occurred, false otherwise. 4819 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 4820 const MultiLevelTemplateArgumentList &TemplateArgs, 4821 llvm::SmallVectorImpl<Expr *> &Outputs); 4822 4823 StmtResult SubstStmt(Stmt *S, 4824 const MultiLevelTemplateArgumentList &TemplateArgs); 4825 4826 Decl *SubstDecl(Decl *D, DeclContext *Owner, 4827 const MultiLevelTemplateArgumentList &TemplateArgs); 4828 4829 bool 4830 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 4831 CXXRecordDecl *Pattern, 4832 const MultiLevelTemplateArgumentList &TemplateArgs); 4833 4834 bool 4835 InstantiateClass(SourceLocation PointOfInstantiation, 4836 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 4837 const MultiLevelTemplateArgumentList &TemplateArgs, 4838 TemplateSpecializationKind TSK, 4839 bool Complain = true); 4840 4841 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 4842 Decl *Pattern, Decl *Inst); 4843 4844 bool 4845 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 4846 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4847 TemplateSpecializationKind TSK, 4848 bool Complain = true); 4849 4850 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 4851 CXXRecordDecl *Instantiation, 4852 const MultiLevelTemplateArgumentList &TemplateArgs, 4853 TemplateSpecializationKind TSK); 4854 4855 void InstantiateClassTemplateSpecializationMembers( 4856 SourceLocation PointOfInstantiation, 4857 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4858 TemplateSpecializationKind TSK); 4859 4860 NestedNameSpecifierLoc 4861 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 4862 const MultiLevelTemplateArgumentList &TemplateArgs); 4863 4864 DeclarationNameInfo 4865 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 4866 const MultiLevelTemplateArgumentList &TemplateArgs); 4867 TemplateName 4868 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 4869 SourceLocation Loc, 4870 const MultiLevelTemplateArgumentList &TemplateArgs); 4871 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 4872 TemplateArgumentListInfo &Result, 4873 const MultiLevelTemplateArgumentList &TemplateArgs); 4874 4875 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 4876 FunctionDecl *Function, 4877 bool Recursive = false, 4878 bool DefinitionRequired = false); 4879 void InstantiateStaticDataMemberDefinition( 4880 SourceLocation PointOfInstantiation, 4881 VarDecl *Var, 4882 bool Recursive = false, 4883 bool DefinitionRequired = false); 4884 4885 void InstantiateMemInitializers(CXXConstructorDecl *New, 4886 const CXXConstructorDecl *Tmpl, 4887 const MultiLevelTemplateArgumentList &TemplateArgs); 4888 4889 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 4890 const MultiLevelTemplateArgumentList &TemplateArgs); 4891 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 4892 const MultiLevelTemplateArgumentList &TemplateArgs); 4893 4894 // Objective-C declarations. 4895 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 4896 IdentifierInfo *ClassName, 4897 SourceLocation ClassLoc, 4898 IdentifierInfo *SuperName, 4899 SourceLocation SuperLoc, 4900 Decl * const *ProtoRefs, 4901 unsigned NumProtoRefs, 4902 const SourceLocation *ProtoLocs, 4903 SourceLocation EndProtoLoc, 4904 AttributeList *AttrList); 4905 4906 Decl *ActOnCompatiblityAlias( 4907 SourceLocation AtCompatibilityAliasLoc, 4908 IdentifierInfo *AliasName, SourceLocation AliasLocation, 4909 IdentifierInfo *ClassName, SourceLocation ClassLocation); 4910 4911 bool CheckForwardProtocolDeclarationForCircularDependency( 4912 IdentifierInfo *PName, 4913 SourceLocation &PLoc, SourceLocation PrevLoc, 4914 const ObjCList<ObjCProtocolDecl> &PList); 4915 4916 Decl *ActOnStartProtocolInterface( 4917 SourceLocation AtProtoInterfaceLoc, 4918 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 4919 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 4920 const SourceLocation *ProtoLocs, 4921 SourceLocation EndProtoLoc, 4922 AttributeList *AttrList); 4923 4924 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 4925 IdentifierInfo *ClassName, 4926 SourceLocation ClassLoc, 4927 IdentifierInfo *CategoryName, 4928 SourceLocation CategoryLoc, 4929 Decl * const *ProtoRefs, 4930 unsigned NumProtoRefs, 4931 const SourceLocation *ProtoLocs, 4932 SourceLocation EndProtoLoc); 4933 4934 Decl *ActOnStartClassImplementation( 4935 SourceLocation AtClassImplLoc, 4936 IdentifierInfo *ClassName, SourceLocation ClassLoc, 4937 IdentifierInfo *SuperClassname, 4938 SourceLocation SuperClassLoc); 4939 4940 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 4941 IdentifierInfo *ClassName, 4942 SourceLocation ClassLoc, 4943 IdentifierInfo *CatName, 4944 SourceLocation CatLoc); 4945 4946 Decl *ActOnForwardClassDeclaration(SourceLocation Loc, 4947 IdentifierInfo **IdentList, 4948 SourceLocation *IdentLocs, 4949 unsigned NumElts); 4950 4951 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 4952 const IdentifierLocPair *IdentList, 4953 unsigned NumElts, 4954 AttributeList *attrList); 4955 4956 void FindProtocolDeclaration(bool WarnOnDeclarations, 4957 const IdentifierLocPair *ProtocolId, 4958 unsigned NumProtocols, 4959 llvm::SmallVectorImpl<Decl *> &Protocols); 4960 4961 /// Ensure attributes are consistent with type. 4962 /// \param [in, out] Attributes The attributes to check; they will 4963 /// be modified to be consistent with \arg PropertyTy. 4964 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 4965 SourceLocation Loc, 4966 unsigned &Attributes); 4967 4968 /// Process the specified property declaration and create decls for the 4969 /// setters and getters as needed. 4970 /// \param property The property declaration being processed 4971 /// \param DC The semantic container for the property 4972 /// \param redeclaredProperty Declaration for property if redeclared 4973 /// in class extension. 4974 /// \param lexicalDC Container for redeclaredProperty. 4975 void ProcessPropertyDecl(ObjCPropertyDecl *property, 4976 ObjCContainerDecl *DC, 4977 ObjCPropertyDecl *redeclaredProperty = 0, 4978 ObjCContainerDecl *lexicalDC = 0); 4979 4980 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 4981 ObjCPropertyDecl *SuperProperty, 4982 const IdentifierInfo *Name); 4983 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 4984 4985 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 4986 ObjCMethodDecl *MethodDecl, 4987 bool IsInstance); 4988 4989 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 4990 4991 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 4992 ObjCInterfaceDecl *ID); 4993 4994 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 4995 ObjCProtocolDecl *PDecl); 4996 4997 void ActOnAtEnd(Scope *S, SourceRange AtEnd, Decl *classDecl, 4998 Decl **allMethods = 0, unsigned allNum = 0, 4999 Decl **allProperties = 0, unsigned pNum = 0, 5000 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5001 5002 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5003 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5004 Selector GetterSel, Selector SetterSel, 5005 Decl *ClassCategory, 5006 bool *OverridingProperty, 5007 tok::ObjCKeywordKind MethodImplKind, 5008 DeclContext *lexicalDC = 0); 5009 5010 Decl *ActOnPropertyImplDecl(Scope *S, 5011 SourceLocation AtLoc, 5012 SourceLocation PropertyLoc, 5013 bool ImplKind,Decl *ClassImplDecl, 5014 IdentifierInfo *PropertyId, 5015 IdentifierInfo *PropertyIvar, 5016 SourceLocation PropertyIvarLoc); 5017 5018 enum ObjCSpecialMethodKind { 5019 OSMK_None, 5020 OSMK_Alloc, 5021 OSMK_New, 5022 OSMK_Copy, 5023 OSMK_RetainingInit, 5024 OSMK_NonRetainingInit 5025 }; 5026 5027 struct ObjCArgInfo { 5028 IdentifierInfo *Name; 5029 SourceLocation NameLoc; 5030 // The Type is null if no type was specified, and the DeclSpec is invalid 5031 // in this case. 5032 ParsedType Type; 5033 ObjCDeclSpec DeclSpec; 5034 5035 /// ArgAttrs - Attribute list for this argument. 5036 AttributeList *ArgAttrs; 5037 }; 5038 5039 Decl *ActOnMethodDeclaration( 5040 Scope *S, 5041 SourceLocation BeginLoc, // location of the + or -. 5042 SourceLocation EndLoc, // location of the ; or {. 5043 tok::TokenKind MethodType, 5044 Decl *ClassDecl, ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5045 SourceLocation SelectorStartLoc, Selector Sel, 5046 // optional arguments. The number of types/arguments is obtained 5047 // from the Sel.getNumArgs(). 5048 ObjCArgInfo *ArgInfo, 5049 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5050 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5051 bool isVariadic, bool MethodDefinition); 5052 5053 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5054 // Will search "local" class/category implementations for a method decl. 5055 // Will also search in class's root looking for instance method. 5056 // Returns 0 if no method is found. 5057 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5058 ObjCInterfaceDecl *CDecl); 5059 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5060 ObjCInterfaceDecl *ClassDecl); 5061 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5062 const ObjCObjectPointerType *OPT, 5063 bool IsInstance); 5064 5065 bool inferObjCARCLifetime(ValueDecl *decl); 5066 5067 ExprResult 5068 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5069 Expr *BaseExpr, 5070 SourceLocation OpLoc, 5071 DeclarationName MemberName, 5072 SourceLocation MemberLoc, 5073 SourceLocation SuperLoc, QualType SuperType, 5074 bool Super); 5075 5076 ExprResult 5077 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5078 IdentifierInfo &propertyName, 5079 SourceLocation receiverNameLoc, 5080 SourceLocation propertyNameLoc); 5081 5082 ObjCMethodDecl *tryCaptureObjCSelf(); 5083 5084 /// \brief Describes the kind of message expression indicated by a message 5085 /// send that starts with an identifier. 5086 enum ObjCMessageKind { 5087 /// \brief The message is sent to 'super'. 5088 ObjCSuperMessage, 5089 /// \brief The message is an instance message. 5090 ObjCInstanceMessage, 5091 /// \brief The message is a class message, and the identifier is a type 5092 /// name. 5093 ObjCClassMessage 5094 }; 5095 5096 ObjCMessageKind getObjCMessageKind(Scope *S, 5097 IdentifierInfo *Name, 5098 SourceLocation NameLoc, 5099 bool IsSuper, 5100 bool HasTrailingDot, 5101 ParsedType &ReceiverType); 5102 5103 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5104 Selector Sel, 5105 SourceLocation LBracLoc, 5106 SourceLocation SelectorLoc, 5107 SourceLocation RBracLoc, 5108 MultiExprArg Args); 5109 5110 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5111 QualType ReceiverType, 5112 SourceLocation SuperLoc, 5113 Selector Sel, 5114 ObjCMethodDecl *Method, 5115 SourceLocation LBracLoc, 5116 SourceLocation SelectorLoc, 5117 SourceLocation RBracLoc, 5118 MultiExprArg Args); 5119 5120 ExprResult ActOnClassMessage(Scope *S, 5121 ParsedType Receiver, 5122 Selector Sel, 5123 SourceLocation LBracLoc, 5124 SourceLocation SelectorLoc, 5125 SourceLocation RBracLoc, 5126 MultiExprArg Args); 5127 5128 ExprResult BuildInstanceMessage(Expr *Receiver, 5129 QualType ReceiverType, 5130 SourceLocation SuperLoc, 5131 Selector Sel, 5132 ObjCMethodDecl *Method, 5133 SourceLocation LBracLoc, 5134 SourceLocation SelectorLoc, 5135 SourceLocation RBracLoc, 5136 MultiExprArg Args); 5137 5138 ExprResult ActOnInstanceMessage(Scope *S, 5139 Expr *Receiver, 5140 Selector Sel, 5141 SourceLocation LBracLoc, 5142 SourceLocation SelectorLoc, 5143 SourceLocation RBracLoc, 5144 MultiExprArg Args); 5145 5146 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5147 ObjCBridgeCastKind Kind, 5148 SourceLocation BridgeKeywordLoc, 5149 TypeSourceInfo *TSInfo, 5150 Expr *SubExpr); 5151 5152 ExprResult ActOnObjCBridgedCast(Scope *S, 5153 SourceLocation LParenLoc, 5154 ObjCBridgeCastKind Kind, 5155 SourceLocation BridgeKeywordLoc, 5156 ParsedType Type, 5157 SourceLocation RParenLoc, 5158 Expr *SubExpr); 5159 5160 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5161 5162 /// \brief Check whether the given new method is a valid override of the 5163 /// given overridden method, and set any properties that should be inherited. 5164 /// 5165 /// \returns True if an error occurred. 5166 bool CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5167 const ObjCMethodDecl *Overridden, 5168 bool IsImplementation); 5169 5170 /// \brief Check whether the given method overrides any methods in its class, 5171 /// calling \c CheckObjCMethodOverride for each overridden method. 5172 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5173 5174 enum PragmaOptionsAlignKind { 5175 POAK_Native, // #pragma options align=native 5176 POAK_Natural, // #pragma options align=natural 5177 POAK_Packed, // #pragma options align=packed 5178 POAK_Power, // #pragma options align=power 5179 POAK_Mac68k, // #pragma options align=mac68k 5180 POAK_Reset // #pragma options align=reset 5181 }; 5182 5183 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5184 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5185 SourceLocation PragmaLoc, 5186 SourceLocation KindLoc); 5187 5188 enum PragmaPackKind { 5189 PPK_Default, // #pragma pack([n]) 5190 PPK_Show, // #pragma pack(show), only supported by MSVC. 5191 PPK_Push, // #pragma pack(push, [identifier], [n]) 5192 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5193 }; 5194 5195 enum PragmaMSStructKind { 5196 PMSST_OFF, // #pragms ms_struct off 5197 PMSST_ON // #pragms ms_struct on 5198 }; 5199 5200 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5201 void ActOnPragmaPack(PragmaPackKind Kind, 5202 IdentifierInfo *Name, 5203 Expr *Alignment, 5204 SourceLocation PragmaLoc, 5205 SourceLocation LParenLoc, 5206 SourceLocation RParenLoc); 5207 5208 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5209 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5210 5211 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5212 void ActOnPragmaUnused(const Token &Identifier, 5213 Scope *curScope, 5214 SourceLocation PragmaLoc); 5215 5216 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5217 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 5218 SourceLocation PragmaLoc); 5219 5220 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II); 5221 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5222 5223 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5224 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5225 SourceLocation PragmaLoc, 5226 SourceLocation WeakNameLoc); 5227 5228 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5229 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5230 IdentifierInfo* AliasName, 5231 SourceLocation PragmaLoc, 5232 SourceLocation WeakNameLoc, 5233 SourceLocation AliasNameLoc); 5234 5235 /// ActOnPragmaFPContract - Called on well formed 5236 /// #pragma {STDC,OPENCL} FP_CONTRACT 5237 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5238 5239 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5240 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5241 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5242 5243 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5244 void AddMsStructLayoutForRecord(RecordDecl *RD); 5245 5246 /// FreePackedContext - Deallocate and null out PackContext. 5247 void FreePackedContext(); 5248 5249 /// PushNamespaceVisibilityAttr - Note that we've entered a 5250 /// namespace with a visibility attribute. 5251 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 5252 5253 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5254 /// add an appropriate visibility attribute. 5255 void AddPushedVisibilityAttribute(Decl *RD); 5256 5257 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5258 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5259 void PopPragmaVisibility(); 5260 5261 /// FreeVisContext - Deallocate and null out VisContext. 5262 void FreeVisContext(); 5263 5264 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5265 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, Expr *E); 5266 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, TypeSourceInfo *T); 5267 5268 /// CastCategory - Get the correct forwarded implicit cast result category 5269 /// from the inner expression. 5270 ExprValueKind CastCategory(Expr *E); 5271 5272 /// \brief The kind of conversion being performed. 5273 enum CheckedConversionKind { 5274 /// \brief An implicit conversion. 5275 CCK_ImplicitConversion, 5276 /// \brief A C-style cast. 5277 CCK_CStyleCast, 5278 /// \brief A functional-style cast. 5279 CCK_FunctionalCast, 5280 /// \brief A cast other than a C-style cast. 5281 CCK_OtherCast 5282 }; 5283 5284 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5285 /// cast. If there is already an implicit cast, merge into the existing one. 5286 /// If isLvalue, the result of the cast is an lvalue. 5287 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5288 ExprValueKind VK = VK_RValue, 5289 const CXXCastPath *BasePath = 0, 5290 CheckedConversionKind CCK 5291 = CCK_ImplicitConversion); 5292 5293 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5294 /// to the conversion from scalar type ScalarTy to the Boolean type. 5295 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5296 5297 /// IgnoredValueConversions - Given that an expression's result is 5298 /// syntactically ignored, perform any conversions that are 5299 /// required. 5300 ExprResult IgnoredValueConversions(Expr *E); 5301 5302 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5303 // functions and arrays to their respective pointers (C99 6.3.2.1). 5304 ExprResult UsualUnaryConversions(Expr *E); 5305 5306 // DefaultFunctionArrayConversion - converts functions and arrays 5307 // to their respective pointers (C99 6.3.2.1). 5308 ExprResult DefaultFunctionArrayConversion(Expr *E); 5309 5310 // DefaultFunctionArrayLvalueConversion - converts functions and 5311 // arrays to their respective pointers and performs the 5312 // lvalue-to-rvalue conversion. 5313 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5314 5315 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5316 // the operand. This is DefaultFunctionArrayLvalueConversion, 5317 // except that it assumes the operand isn't of function or array 5318 // type. 5319 ExprResult DefaultLvalueConversion(Expr *E); 5320 5321 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5322 // do not have a prototype. Integer promotions are performed on each 5323 // argument, and arguments that have type float are promoted to double. 5324 ExprResult DefaultArgumentPromotion(Expr *E); 5325 5326 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5327 enum VariadicCallType { 5328 VariadicFunction, 5329 VariadicBlock, 5330 VariadicMethod, 5331 VariadicConstructor, 5332 VariadicDoesNotApply 5333 }; 5334 5335 /// GatherArgumentsForCall - Collector argument expressions for various 5336 /// form of call prototypes. 5337 bool GatherArgumentsForCall(SourceLocation CallLoc, 5338 FunctionDecl *FDecl, 5339 const FunctionProtoType *Proto, 5340 unsigned FirstProtoArg, 5341 Expr **Args, unsigned NumArgs, 5342 llvm::SmallVector<Expr *, 8> &AllArgs, 5343 VariadicCallType CallType = VariadicDoesNotApply); 5344 5345 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5346 // will warn if the resulting type is not a POD type. 5347 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5348 FunctionDecl *FDecl); 5349 5350 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5351 // operands and then handles various conversions that are common to binary 5352 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5353 // routine returns the first non-arithmetic type found. The client is 5354 // responsible for emitting appropriate error diagnostics. 5355 QualType UsualArithmeticConversions(ExprResult &lExpr, ExprResult &rExpr, 5356 bool isCompAssign = false); 5357 5358 /// AssignConvertType - All of the 'assignment' semantic checks return this 5359 /// enum to indicate whether the assignment was allowed. These checks are 5360 /// done for simple assignments, as well as initialization, return from 5361 /// function, argument passing, etc. The query is phrased in terms of a 5362 /// source and destination type. 5363 enum AssignConvertType { 5364 /// Compatible - the types are compatible according to the standard. 5365 Compatible, 5366 5367 /// PointerToInt - The assignment converts a pointer to an int, which we 5368 /// accept as an extension. 5369 PointerToInt, 5370 5371 /// IntToPointer - The assignment converts an int to a pointer, which we 5372 /// accept as an extension. 5373 IntToPointer, 5374 5375 /// FunctionVoidPointer - The assignment is between a function pointer and 5376 /// void*, which the standard doesn't allow, but we accept as an extension. 5377 FunctionVoidPointer, 5378 5379 /// IncompatiblePointer - The assignment is between two pointers types that 5380 /// are not compatible, but we accept them as an extension. 5381 IncompatiblePointer, 5382 5383 /// IncompatiblePointer - The assignment is between two pointers types which 5384 /// point to integers which have a different sign, but are otherwise identical. 5385 /// This is a subset of the above, but broken out because it's by far the most 5386 /// common case of incompatible pointers. 5387 IncompatiblePointerSign, 5388 5389 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5390 /// c/v/r qualifiers, which we accept as an extension. 5391 CompatiblePointerDiscardsQualifiers, 5392 5393 /// IncompatiblePointerDiscardsQualifiers - The assignment 5394 /// discards qualifiers that we don't permit to be discarded, 5395 /// like address spaces. 5396 IncompatiblePointerDiscardsQualifiers, 5397 5398 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5399 /// nested pointer types, and the qualifiers other than the first two 5400 /// levels differ e.g. char ** -> const char **, but we accept them as an 5401 /// extension. 5402 IncompatibleNestedPointerQualifiers, 5403 5404 /// IncompatibleVectors - The assignment is between two vector types that 5405 /// have the same size, which we accept as an extension. 5406 IncompatibleVectors, 5407 5408 /// IntToBlockPointer - The assignment converts an int to a block 5409 /// pointer. We disallow this. 5410 IntToBlockPointer, 5411 5412 /// IncompatibleBlockPointer - The assignment is between two block 5413 /// pointers types that are not compatible. 5414 IncompatibleBlockPointer, 5415 5416 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5417 /// id type and something else (that is incompatible with it). For example, 5418 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5419 IncompatibleObjCQualifiedId, 5420 5421 /// Incompatible - We reject this conversion outright, it is invalid to 5422 /// represent it in the AST. 5423 Incompatible 5424 }; 5425 5426 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5427 /// assignment conversion type specified by ConvTy. This returns true if the 5428 /// conversion was invalid or false if the conversion was accepted. 5429 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5430 SourceLocation Loc, 5431 QualType DstType, QualType SrcType, 5432 Expr *SrcExpr, AssignmentAction Action, 5433 bool *Complained = 0); 5434 5435 /// CheckAssignmentConstraints - Perform type checking for assignment, 5436 /// argument passing, variable initialization, and function return values. 5437 /// C99 6.5.16. 5438 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5439 QualType lhs, QualType rhs); 5440 5441 /// Check assignment constraints and prepare for a conversion of the 5442 /// RHS to the LHS type. 5443 AssignConvertType CheckAssignmentConstraints(QualType lhs, ExprResult &rhs, 5444 CastKind &Kind); 5445 5446 // CheckSingleAssignmentConstraints - Currently used by 5447 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5448 // this routine performs the default function/array converions. 5449 AssignConvertType CheckSingleAssignmentConstraints(QualType lhs, 5450 ExprResult &rExprRes); 5451 5452 // \brief If the lhs type is a transparent union, check whether we 5453 // can initialize the transparent union with the given expression. 5454 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType lhs, 5455 ExprResult &rExpr); 5456 5457 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5458 5459 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5460 5461 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5462 AssignmentAction Action, 5463 bool AllowExplicit = false); 5464 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5465 AssignmentAction Action, 5466 bool AllowExplicit, 5467 ImplicitConversionSequence& ICS); 5468 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5469 const ImplicitConversionSequence& ICS, 5470 AssignmentAction Action, 5471 CheckedConversionKind CCK 5472 = CCK_ImplicitConversion); 5473 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5474 const StandardConversionSequence& SCS, 5475 AssignmentAction Action, 5476 CheckedConversionKind CCK); 5477 5478 /// the following "Check" methods will return a valid/converted QualType 5479 /// or a null QualType (indicating an error diagnostic was issued). 5480 5481 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5482 QualType InvalidOperands(SourceLocation l, ExprResult &lex, ExprResult &rex); 5483 QualType CheckPointerToMemberOperands( // C++ 5.5 5484 ExprResult &lex, ExprResult &rex, ExprValueKind &VK, 5485 SourceLocation OpLoc, bool isIndirect); 5486 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5487 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign, 5488 bool isDivide); 5489 QualType CheckRemainderOperands( // C99 6.5.5 5490 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 5491 QualType CheckAdditionOperands( // C99 6.5.6 5492 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 5493 QualType CheckSubtractionOperands( // C99 6.5.6 5494 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 5495 QualType CheckShiftOperands( // C99 6.5.7 5496 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 5497 bool isCompAssign = false); 5498 QualType CheckCompareOperands( // C99 6.5.8/9 5499 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 5500 bool isRelational); 5501 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 5502 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 5503 QualType CheckLogicalOperands( // C99 6.5.[13,14] 5504 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc); 5505 // CheckAssignmentOperands is used for both simple and compound assignment. 5506 // For simple assignment, pass both expressions and a null converted type. 5507 // For compound assignment, pass both expressions and the converted type. 5508 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 5509 Expr *lex, ExprResult &rex, SourceLocation OpLoc, QualType convertedType); 5510 5511 void ConvertPropertyForLValue(ExprResult &LHS, ExprResult &RHS, QualType& LHSTy); 5512 ExprResult ConvertPropertyForRValue(Expr *E); 5513 5514 QualType CheckConditionalOperands( // C99 6.5.15 5515 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5516 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5517 QualType CXXCheckConditionalOperands( // C++ 5.16 5518 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5519 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5520 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 5521 bool *NonStandardCompositeType = 0); 5522 QualType FindCompositePointerType(SourceLocation Loc, ExprResult &E1, ExprResult &E2, 5523 bool *NonStandardCompositeType = 0) { 5524 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 5525 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, NonStandardCompositeType); 5526 E1 = Owned(E1Tmp); 5527 E2 = Owned(E2Tmp); 5528 return Composite; 5529 } 5530 5531 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5532 SourceLocation questionLoc); 5533 5534 bool DiagnoseConditionalForNull(Expr *LHS, Expr *RHS, 5535 SourceLocation QuestionLoc); 5536 5537 /// type checking for vector binary operators. 5538 QualType CheckVectorOperands(ExprResult &lex, ExprResult &rex, 5539 SourceLocation Loc, bool isCompAssign); 5540 QualType CheckVectorCompareOperands(ExprResult &lex, ExprResult &rx, 5541 SourceLocation l, bool isRel); 5542 5543 /// type checking declaration initializers (C99 6.7.8) 5544 bool CheckInitList(const InitializedEntity &Entity, 5545 InitListExpr *&InitList, QualType &DeclType); 5546 bool CheckForConstantInitializer(Expr *e, QualType t); 5547 5548 // type checking C++ declaration initializers (C++ [dcl.init]). 5549 5550 /// ReferenceCompareResult - Expresses the result of comparing two 5551 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5552 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5553 enum ReferenceCompareResult { 5554 /// Ref_Incompatible - The two types are incompatible, so direct 5555 /// reference binding is not possible. 5556 Ref_Incompatible = 0, 5557 /// Ref_Related - The two types are reference-related, which means 5558 /// that their unqualified forms (T1 and T2) are either the same 5559 /// or T1 is a base class of T2. 5560 Ref_Related, 5561 /// Ref_Compatible_With_Added_Qualification - The two types are 5562 /// reference-compatible with added qualification, meaning that 5563 /// they are reference-compatible and the qualifiers on T1 (cv1) 5564 /// are greater than the qualifiers on T2 (cv2). 5565 Ref_Compatible_With_Added_Qualification, 5566 /// Ref_Compatible - The two types are reference-compatible and 5567 /// have equivalent qualifiers (cv1 == cv2). 5568 Ref_Compatible 5569 }; 5570 5571 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 5572 QualType T1, QualType T2, 5573 bool &DerivedToBase, 5574 bool &ObjCConversion, 5575 bool &ObjCLifetimeConversion); 5576 5577 /// CheckCastTypes - Check type constraints for casting between types under 5578 /// C semantics, or forward to CXXCheckCStyleCast in C++. 5579 ExprResult CheckCastTypes(SourceLocation CastStartLoc, SourceRange TyRange, 5580 QualType CastTy, Expr *CastExpr, CastKind &Kind, 5581 ExprValueKind &VK, CXXCastPath &BasePath, 5582 bool FunctionalStyle = false); 5583 5584 ExprResult checkUnknownAnyCast(SourceRange TyRange, QualType castType, 5585 Expr *castExpr, CastKind &castKind, 5586 ExprValueKind &valueKind, CXXCastPath &BasePath); 5587 5588 // CheckVectorCast - check type constraints for vectors. 5589 // Since vectors are an extension, there are no C standard reference for this. 5590 // We allow casting between vectors and integer datatypes of the same size. 5591 // returns true if the cast is invalid 5592 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 5593 CastKind &Kind); 5594 5595 // CheckExtVectorCast - check type constraints for extended vectors. 5596 // Since vectors are an extension, there are no C standard reference for this. 5597 // We allow casting between vectors and integer datatypes of the same size, 5598 // or vectors and the element type of that vector. 5599 // returns the cast expr 5600 ExprResult CheckExtVectorCast(SourceRange R, QualType VectorTy, Expr *CastExpr, 5601 CastKind &Kind); 5602 5603 /// CXXCheckCStyleCast - Check constraints of a C-style or function-style 5604 /// cast under C++ semantics. 5605 ExprResult CXXCheckCStyleCast(SourceRange R, QualType CastTy, ExprValueKind &VK, 5606 Expr *CastExpr, CastKind &Kind, 5607 CXXCastPath &BasePath, bool FunctionalStyle); 5608 5609 /// \brief Checks for valid expressions which can be cast to an ObjC 5610 /// pointer without needing a bridge cast. 5611 bool ValidObjCARCNoBridgeCastExpr(Expr *&Exp, QualType castType); 5612 5613 /// \brief Checks for invalid conversions and casts between 5614 /// retainable pointers and other pointer kinds. 5615 void CheckObjCARCConversion(SourceRange castRange, QualType castType, 5616 Expr *&op, CheckedConversionKind CCK); 5617 5618 /// checkRetainCycles - Check whether an Objective-C message send 5619 /// might create an obvious retain cycle. 5620 void checkRetainCycles(ObjCMessageExpr *msg); 5621 void checkRetainCycles(Expr *receiver, Expr *argument); 5622 5623 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 5624 /// to weak/__unsafe_unretained type. 5625 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 5626 5627 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 5628 /// to weak/__unsafe_unretained expression. 5629 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 5630 5631 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 5632 /// \param Method - May be null. 5633 /// \param [out] ReturnType - The return type of the send. 5634 /// \return true iff there were any incompatible types. 5635 bool CheckMessageArgumentTypes(QualType ReceiverType, 5636 Expr **Args, unsigned NumArgs, Selector Sel, 5637 ObjCMethodDecl *Method, bool isClassMessage, 5638 bool isSuperMessage, 5639 SourceLocation lbrac, SourceLocation rbrac, 5640 QualType &ReturnType, ExprValueKind &VK); 5641 5642 /// \brief Determine the result of a message send expression based on 5643 /// the type of the receiver, the method expected to receive the message, 5644 /// and the form of the message send. 5645 QualType getMessageSendResultType(QualType ReceiverType, 5646 ObjCMethodDecl *Method, 5647 bool isClassMessage, bool isSuperMessage); 5648 5649 /// \brief If the given expression involves a message send to a method 5650 /// with a related result type, emit a note describing what happened. 5651 void EmitRelatedResultTypeNote(const Expr *E); 5652 5653 /// CheckBooleanCondition - Diagnose problems involving the use of 5654 /// the given expression as a boolean condition (e.g. in an if 5655 /// statement). Also performs the standard function and array 5656 /// decays, possibly changing the input variable. 5657 /// 5658 /// \param Loc - A location associated with the condition, e.g. the 5659 /// 'if' keyword. 5660 /// \return true iff there were any errors 5661 ExprResult CheckBooleanCondition(Expr *CondExpr, SourceLocation Loc); 5662 5663 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 5664 Expr *SubExpr); 5665 5666 /// DiagnoseAssignmentAsCondition - Given that an expression is 5667 /// being used as a boolean condition, warn if it's an assignment. 5668 void DiagnoseAssignmentAsCondition(Expr *E); 5669 5670 /// \brief Redundant parentheses over an equality comparison can indicate 5671 /// that the user intended an assignment used as condition. 5672 void DiagnoseEqualityWithExtraParens(ParenExpr *parenE); 5673 5674 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 5675 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 5676 5677 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 5678 /// the specified width and sign. If an overflow occurs, detect it and emit 5679 /// the specified diagnostic. 5680 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 5681 unsigned NewWidth, bool NewSign, 5682 SourceLocation Loc, unsigned DiagID); 5683 5684 /// Checks that the Objective-C declaration is declared in the global scope. 5685 /// Emits an error and marks the declaration as invalid if it's not declared 5686 /// in the global scope. 5687 bool CheckObjCDeclScope(Decl *D); 5688 5689 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 5690 /// and reports the appropriate diagnostics. Returns false on success. 5691 /// Can optionally return the value of the expression. 5692 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 5693 5694 /// VerifyBitField - verifies that a bit field expression is an ICE and has 5695 /// the correct width, and that the field type is valid. 5696 /// Returns false on success. 5697 /// Can optionally return whether the bit-field is of width 0 5698 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 5699 QualType FieldTy, const Expr *BitWidth, 5700 bool *ZeroWidth = 0); 5701 5702 /// \name Code completion 5703 //@{ 5704 /// \brief Describes the context in which code completion occurs. 5705 enum ParserCompletionContext { 5706 /// \brief Code completion occurs at top-level or namespace context. 5707 PCC_Namespace, 5708 /// \brief Code completion occurs within a class, struct, or union. 5709 PCC_Class, 5710 /// \brief Code completion occurs within an Objective-C interface, protocol, 5711 /// or category. 5712 PCC_ObjCInterface, 5713 /// \brief Code completion occurs within an Objective-C implementation or 5714 /// category implementation 5715 PCC_ObjCImplementation, 5716 /// \brief Code completion occurs within the list of instance variables 5717 /// in an Objective-C interface, protocol, category, or implementation. 5718 PCC_ObjCInstanceVariableList, 5719 /// \brief Code completion occurs following one or more template 5720 /// headers. 5721 PCC_Template, 5722 /// \brief Code completion occurs following one or more template 5723 /// headers within a class. 5724 PCC_MemberTemplate, 5725 /// \brief Code completion occurs within an expression. 5726 PCC_Expression, 5727 /// \brief Code completion occurs within a statement, which may 5728 /// also be an expression or a declaration. 5729 PCC_Statement, 5730 /// \brief Code completion occurs at the beginning of the 5731 /// initialization statement (or expression) in a for loop. 5732 PCC_ForInit, 5733 /// \brief Code completion occurs within the condition of an if, 5734 /// while, switch, or for statement. 5735 PCC_Condition, 5736 /// \brief Code completion occurs within the body of a function on a 5737 /// recovery path, where we do not have a specific handle on our position 5738 /// in the grammar. 5739 PCC_RecoveryInFunction, 5740 /// \brief Code completion occurs where only a type is permitted. 5741 PCC_Type, 5742 /// \brief Code completion occurs in a parenthesized expression, which 5743 /// might also be a type cast. 5744 PCC_ParenthesizedExpression, 5745 /// \brief Code completion occurs within a sequence of declaration 5746 /// specifiers within a function, method, or block. 5747 PCC_LocalDeclarationSpecifiers 5748 }; 5749 5750 void CodeCompleteOrdinaryName(Scope *S, 5751 ParserCompletionContext CompletionContext); 5752 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 5753 bool AllowNonIdentifiers, 5754 bool AllowNestedNameSpecifiers); 5755 5756 struct CodeCompleteExpressionData; 5757 void CodeCompleteExpression(Scope *S, 5758 const CodeCompleteExpressionData &Data); 5759 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 5760 SourceLocation OpLoc, 5761 bool IsArrow); 5762 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 5763 void CodeCompleteTag(Scope *S, unsigned TagSpec); 5764 void CodeCompleteTypeQualifiers(DeclSpec &DS); 5765 void CodeCompleteCase(Scope *S); 5766 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 5767 void CodeCompleteInitializer(Scope *S, Decl *D); 5768 void CodeCompleteReturn(Scope *S); 5769 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 5770 5771 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 5772 bool EnteringContext); 5773 void CodeCompleteUsing(Scope *S); 5774 void CodeCompleteUsingDirective(Scope *S); 5775 void CodeCompleteNamespaceDecl(Scope *S); 5776 void CodeCompleteNamespaceAliasDecl(Scope *S); 5777 void CodeCompleteOperatorName(Scope *S); 5778 void CodeCompleteConstructorInitializer(Decl *Constructor, 5779 CXXCtorInitializer** Initializers, 5780 unsigned NumInitializers); 5781 5782 void CodeCompleteObjCAtDirective(Scope *S, Decl *ObjCImpDecl, 5783 bool InInterface); 5784 void CodeCompleteObjCAtVisibility(Scope *S); 5785 void CodeCompleteObjCAtStatement(Scope *S); 5786 void CodeCompleteObjCAtExpression(Scope *S); 5787 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 5788 void CodeCompleteObjCPropertyGetter(Scope *S, Decl *ClassDecl); 5789 void CodeCompleteObjCPropertySetter(Scope *S, Decl *ClassDecl); 5790 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 5791 bool IsParameter); 5792 void CodeCompleteObjCMessageReceiver(Scope *S); 5793 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 5794 IdentifierInfo **SelIdents, 5795 unsigned NumSelIdents, 5796 bool AtArgumentExpression); 5797 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 5798 IdentifierInfo **SelIdents, 5799 unsigned NumSelIdents, 5800 bool AtArgumentExpression, 5801 bool IsSuper = false); 5802 void CodeCompleteObjCInstanceMessage(Scope *S, ExprTy *Receiver, 5803 IdentifierInfo **SelIdents, 5804 unsigned NumSelIdents, 5805 bool AtArgumentExpression, 5806 ObjCInterfaceDecl *Super = 0); 5807 void CodeCompleteObjCForCollection(Scope *S, 5808 DeclGroupPtrTy IterationVar); 5809 void CodeCompleteObjCSelector(Scope *S, 5810 IdentifierInfo **SelIdents, 5811 unsigned NumSelIdents); 5812 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 5813 unsigned NumProtocols); 5814 void CodeCompleteObjCProtocolDecl(Scope *S); 5815 void CodeCompleteObjCInterfaceDecl(Scope *S); 5816 void CodeCompleteObjCSuperclass(Scope *S, 5817 IdentifierInfo *ClassName, 5818 SourceLocation ClassNameLoc); 5819 void CodeCompleteObjCImplementationDecl(Scope *S); 5820 void CodeCompleteObjCInterfaceCategory(Scope *S, 5821 IdentifierInfo *ClassName, 5822 SourceLocation ClassNameLoc); 5823 void CodeCompleteObjCImplementationCategory(Scope *S, 5824 IdentifierInfo *ClassName, 5825 SourceLocation ClassNameLoc); 5826 void CodeCompleteObjCPropertyDefinition(Scope *S, Decl *ObjCImpDecl); 5827 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 5828 IdentifierInfo *PropertyName, 5829 Decl *ObjCImpDecl); 5830 void CodeCompleteObjCMethodDecl(Scope *S, 5831 bool IsInstanceMethod, 5832 ParsedType ReturnType, 5833 Decl *IDecl); 5834 void CodeCompleteObjCMethodDeclSelector(Scope *S, 5835 bool IsInstanceMethod, 5836 bool AtParameterName, 5837 ParsedType ReturnType, 5838 IdentifierInfo **SelIdents, 5839 unsigned NumSelIdents); 5840 void CodeCompletePreprocessorDirective(bool InConditional); 5841 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 5842 void CodeCompletePreprocessorMacroName(bool IsDefinition); 5843 void CodeCompletePreprocessorExpression(); 5844 void CodeCompletePreprocessorMacroArgument(Scope *S, 5845 IdentifierInfo *Macro, 5846 MacroInfo *MacroInfo, 5847 unsigned Argument); 5848 void CodeCompleteNaturalLanguage(); 5849 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 5850 llvm::SmallVectorImpl<CodeCompletionResult> &Results); 5851 //@} 5852 5853 void PrintStats() const {} 5854 5855 //===--------------------------------------------------------------------===// 5856 // Extra semantic analysis beyond the C type system 5857 5858public: 5859 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 5860 unsigned ByteNo) const; 5861 5862private: 5863 void CheckArrayAccess(const Expr *E); 5864 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 5865 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 5866 5867 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 5868 bool CheckObjCString(Expr *Arg); 5869 5870 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5871 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5872 5873 bool SemaBuiltinVAStart(CallExpr *TheCall); 5874 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 5875 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 5876 5877public: 5878 // Used by C++ template instantiation. 5879 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 5880 5881private: 5882 bool SemaBuiltinPrefetch(CallExpr *TheCall); 5883 bool SemaBuiltinObjectSize(CallExpr *TheCall); 5884 bool SemaBuiltinLongjmp(CallExpr *TheCall); 5885 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 5886 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 5887 llvm::APSInt &Result); 5888 5889 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 5890 bool HasVAListArg, unsigned format_idx, 5891 unsigned firstDataArg, bool isPrintf); 5892 5893 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 5894 const CallExpr *TheCall, bool HasVAListArg, 5895 unsigned format_idx, unsigned firstDataArg, 5896 bool isPrintf); 5897 5898 void CheckNonNullArguments(const NonNullAttr *NonNull, 5899 const Expr * const *ExprArgs, 5900 SourceLocation CallSiteLoc); 5901 5902 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 5903 unsigned format_idx, unsigned firstDataArg, 5904 bool isPrintf); 5905 5906 /// \brief Enumeration used to describe which of the memory setting or copying 5907 /// functions is being checked by \c CheckMemsetcpymoveArguments(). 5908 enum CheckedMemoryFunction { 5909 CMF_Memset, 5910 CMF_Memcpy, 5911 CMF_Memmove 5912 }; 5913 5914 void CheckMemsetcpymoveArguments(const CallExpr *Call, 5915 CheckedMemoryFunction CMF, 5916 IdentifierInfo *FnName); 5917 5918 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 5919 SourceLocation ReturnLoc); 5920 void CheckFloatComparison(SourceLocation loc, Expr* lex, Expr* rex); 5921 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 5922 5923 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 5924 Expr *Init); 5925 5926 /// \brief The parser's current scope. 5927 /// 5928 /// The parser maintains this state here. 5929 Scope *CurScope; 5930 5931protected: 5932 friend class Parser; 5933 friend class InitializationSequence; 5934 friend class ASTReader; 5935 friend class ASTWriter; 5936 5937public: 5938 /// \brief Retrieve the parser's current scope. 5939 /// 5940 /// This routine must only be used when it is certain that semantic analysis 5941 /// and the parser are in precisely the same context, which is not the case 5942 /// when, e.g., we are performing any kind of template instantiation. 5943 /// Therefore, the only safe places to use this scope are in the parser 5944 /// itself and in routines directly invoked from the parser and *never* from 5945 /// template substitution or instantiation. 5946 Scope *getCurScope() const { return CurScope; } 5947}; 5948 5949/// \brief RAII object that enters a new expression evaluation context. 5950class EnterExpressionEvaluationContext { 5951 Sema &Actions; 5952 5953public: 5954 EnterExpressionEvaluationContext(Sema &Actions, 5955 Sema::ExpressionEvaluationContext NewContext) 5956 : Actions(Actions) { 5957 Actions.PushExpressionEvaluationContext(NewContext); 5958 } 5959 5960 ~EnterExpressionEvaluationContext() { 5961 Actions.PopExpressionEvaluationContext(); 5962 } 5963}; 5964 5965} // end namespace clang 5966 5967#endif 5968