Sema.h revision e761230ae3751b525cadd8066c74ec278ee4ef57
1//===--- Sema.h - Semantic Analysis & AST Building --------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Sema class, which performs semantic analysis and 11// builds ASTs. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef LLVM_CLANG_SEMA_SEMA_H 16#define LLVM_CLANG_SEMA_SEMA_H 17 18#include "clang/Sema/Ownership.h" 19#include "clang/Sema/AnalysisBasedWarnings.h" 20#include "clang/Sema/IdentifierResolver.h" 21#include "clang/Sema/ObjCMethodList.h" 22#include "clang/Sema/DeclSpec.h" 23#include "clang/Sema/ExternalSemaSource.h" 24#include "clang/Sema/LocInfoType.h" 25#include "clang/Sema/TypoCorrection.h" 26#include "clang/Sema/Weak.h" 27#include "clang/AST/Expr.h" 28#include "clang/AST/DeclarationName.h" 29#include "clang/AST/ExternalASTSource.h" 30#include "clang/AST/TypeLoc.h" 31#include "clang/Basic/Specifiers.h" 32#include "clang/Basic/TemplateKinds.h" 33#include "clang/Basic/TypeTraits.h" 34#include "clang/Basic/ExpressionTraits.h" 35#include "llvm/ADT/OwningPtr.h" 36#include "llvm/ADT/SmallPtrSet.h" 37#include "llvm/ADT/SmallVector.h" 38#include <deque> 39#include <string> 40 41namespace llvm { 42 class APSInt; 43 template <typename ValueT> struct DenseMapInfo; 44 template <typename ValueT, typename ValueInfoT> class DenseSet; 45} 46 47namespace clang { 48 class ADLResult; 49 class ASTConsumer; 50 class ASTContext; 51 class ASTMutationListener; 52 class ASTReader; 53 class ASTWriter; 54 class ArrayType; 55 class AttributeList; 56 class BlockDecl; 57 class CXXBasePath; 58 class CXXBasePaths; 59 typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 60 class CXXConstructorDecl; 61 class CXXConversionDecl; 62 class CXXDestructorDecl; 63 class CXXFieldCollector; 64 class CXXMemberCallExpr; 65 class CXXMethodDecl; 66 class CXXScopeSpec; 67 class CXXTemporary; 68 class CXXTryStmt; 69 class CallExpr; 70 class ClassTemplateDecl; 71 class ClassTemplatePartialSpecializationDecl; 72 class ClassTemplateSpecializationDecl; 73 class CodeCompleteConsumer; 74 class CodeCompletionAllocator; 75 class CodeCompletionResult; 76 class Decl; 77 class DeclAccessPair; 78 class DeclContext; 79 class DeclRefExpr; 80 class DeclaratorDecl; 81 class DeducedTemplateArgument; 82 class DependentDiagnostic; 83 class DesignatedInitExpr; 84 class Designation; 85 class EnumConstantDecl; 86 class Expr; 87 class ExtVectorType; 88 class ExternalSemaSource; 89 class FormatAttr; 90 class FriendDecl; 91 class FunctionDecl; 92 class FunctionProtoType; 93 class FunctionTemplateDecl; 94 class ImplicitConversionSequence; 95 class InitListExpr; 96 class InitializationKind; 97 class InitializationSequence; 98 class InitializedEntity; 99 class IntegerLiteral; 100 class LabelStmt; 101 class LangOptions; 102 class LocalInstantiationScope; 103 class LookupResult; 104 class MacroInfo; 105 class MultiLevelTemplateArgumentList; 106 class NamedDecl; 107 class NonNullAttr; 108 class ObjCCategoryDecl; 109 class ObjCCategoryImplDecl; 110 class ObjCCompatibleAliasDecl; 111 class ObjCContainerDecl; 112 class ObjCImplDecl; 113 class ObjCImplementationDecl; 114 class ObjCInterfaceDecl; 115 class ObjCIvarDecl; 116 template <class T> class ObjCList; 117 class ObjCMessageExpr; 118 class ObjCMethodDecl; 119 class ObjCPropertyDecl; 120 class ObjCProtocolDecl; 121 class OverloadCandidateSet; 122 class OverloadExpr; 123 class ParenListExpr; 124 class ParmVarDecl; 125 class Preprocessor; 126 class PseudoDestructorTypeStorage; 127 class QualType; 128 class StandardConversionSequence; 129 class Stmt; 130 class StringLiteral; 131 class SwitchStmt; 132 class TargetAttributesSema; 133 class TemplateArgument; 134 class TemplateArgumentList; 135 class TemplateArgumentLoc; 136 class TemplateDecl; 137 class TemplateParameterList; 138 class TemplatePartialOrderingContext; 139 class TemplateTemplateParmDecl; 140 class Token; 141 class TypeAliasDecl; 142 class TypedefDecl; 143 class TypedefNameDecl; 144 class TypeLoc; 145 class UnqualifiedId; 146 class UnresolvedLookupExpr; 147 class UnresolvedMemberExpr; 148 class UnresolvedSetImpl; 149 class UnresolvedSetIterator; 150 class UsingDecl; 151 class UsingShadowDecl; 152 class ValueDecl; 153 class VarDecl; 154 class VisibilityAttr; 155 class VisibleDeclConsumer; 156 class IndirectFieldDecl; 157 158namespace sema { 159 class AccessedEntity; 160 class BlockScopeInfo; 161 class DelayedDiagnostic; 162 class FunctionScopeInfo; 163 class TemplateDeductionInfo; 164} 165 166// FIXME: No way to easily map from TemplateTypeParmTypes to 167// TemplateTypeParmDecls, so we have this horrible PointerUnion. 168typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 169 SourceLocation> UnexpandedParameterPack; 170 171/// Sema - This implements semantic analysis and AST building for C. 172class Sema { 173 Sema(const Sema&); // DO NOT IMPLEMENT 174 void operator=(const Sema&); // DO NOT IMPLEMENT 175 mutable const TargetAttributesSema* TheTargetAttributesSema; 176public: 177 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 178 typedef OpaquePtr<TemplateName> TemplateTy; 179 typedef OpaquePtr<QualType> TypeTy; 180 181 OpenCLOptions OpenCLFeatures; 182 FPOptions FPFeatures; 183 184 const LangOptions &LangOpts; 185 Preprocessor &PP; 186 ASTContext &Context; 187 ASTConsumer &Consumer; 188 Diagnostic &Diags; 189 SourceManager &SourceMgr; 190 191 /// \brief Flag indicating whether or not to collect detailed statistics. 192 bool CollectStats; 193 194 /// \brief Source of additional semantic information. 195 ExternalSemaSource *ExternalSource; 196 197 /// \brief Code-completion consumer. 198 CodeCompleteConsumer *CodeCompleter; 199 200 /// CurContext - This is the current declaration context of parsing. 201 DeclContext *CurContext; 202 203 /// VAListTagName - The declaration name corresponding to __va_list_tag. 204 /// This is used as part of a hack to omit that class from ADL results. 205 DeclarationName VAListTagName; 206 207 /// PackContext - Manages the stack for #pragma pack. An alignment 208 /// of 0 indicates default alignment. 209 void *PackContext; // Really a "PragmaPackStack*" 210 211 bool MSStructPragmaOn; // True when #pragma ms_struct on 212 213 /// VisContext - Manages the stack for #pragma GCC visibility. 214 void *VisContext; // Really a "PragmaVisStack*" 215 216 /// ExprNeedsCleanups - True if the current evaluation context 217 /// requires cleanups to be run at its conclusion. 218 bool ExprNeedsCleanups; 219 220 /// \brief Stack containing information about each of the nested 221 /// function, block, and method scopes that are currently active. 222 /// 223 /// This array is never empty. Clients should ignore the first 224 /// element, which is used to cache a single FunctionScopeInfo 225 /// that's used to parse every top-level function. 226 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 227 228 /// ExprTemporaries - This is the stack of temporaries that are created by 229 /// the current full expression. 230 SmallVector<CXXTemporary*, 8> ExprTemporaries; 231 232 typedef LazyVector<TypedefNameDecl *, ExternalSemaSource, 233 &ExternalSemaSource::ReadExtVectorDecls, 2, 2> 234 ExtVectorDeclsType; 235 236 /// ExtVectorDecls - This is a list all the extended vector types. This allows 237 /// us to associate a raw vector type with one of the ext_vector type names. 238 /// This is only necessary for issuing pretty diagnostics. 239 ExtVectorDeclsType ExtVectorDecls; 240 241 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 242 llvm::OwningPtr<CXXFieldCollector> FieldCollector; 243 244 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 245 246 /// PureVirtualClassDiagSet - a set of class declarations which we have 247 /// emitted a list of pure virtual functions. Used to prevent emitting the 248 /// same list more than once. 249 llvm::OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 250 251 /// ParsingInitForAutoVars - a set of declarations with auto types for which 252 /// we are currently parsing the initializer. 253 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 254 255 /// \brief A mapping from external names to the most recent 256 /// locally-scoped external declaration with that name. 257 /// 258 /// This map contains external declarations introduced in local 259 /// scoped, e.g., 260 /// 261 /// \code 262 /// void f() { 263 /// void foo(int, int); 264 /// } 265 /// \endcode 266 /// 267 /// Here, the name "foo" will be associated with the declaration on 268 /// "foo" within f. This name is not visible outside of 269 /// "f". However, we still find it in two cases: 270 /// 271 /// - If we are declaring another external with the name "foo", we 272 /// can find "foo" as a previous declaration, so that the types 273 /// of this external declaration can be checked for 274 /// compatibility. 275 /// 276 /// - If we would implicitly declare "foo" (e.g., due to a call to 277 /// "foo" in C when no prototype or definition is visible), then 278 /// we find this declaration of "foo" and complain that it is 279 /// not visible. 280 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 281 282 /// \brief Look for a locally scoped external declaration by the given name. 283 llvm::DenseMap<DeclarationName, NamedDecl *>::iterator 284 findLocallyScopedExternalDecl(DeclarationName Name); 285 286 typedef LazyVector<VarDecl *, ExternalSemaSource, 287 &ExternalSemaSource::ReadTentativeDefinitions, 2, 2> 288 TentativeDefinitionsType; 289 290 /// \brief All the tentative definitions encountered in the TU. 291 TentativeDefinitionsType TentativeDefinitions; 292 293 typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource, 294 &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2> 295 UnusedFileScopedDeclsType; 296 297 /// \brief The set of file scoped decls seen so far that have not been used 298 /// and must warn if not used. Only contains the first declaration. 299 UnusedFileScopedDeclsType UnusedFileScopedDecls; 300 301 typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource, 302 &ExternalSemaSource::ReadDelegatingConstructors, 2, 2> 303 DelegatingCtorDeclsType; 304 305 /// \brief All the delegating constructors seen so far in the file, used for 306 /// cycle detection at the end of the TU. 307 DelegatingCtorDeclsType DelegatingCtorDecls; 308 309 /// \brief All the overriding destructors seen during a class definition 310 /// (there could be multiple due to nested classes) that had their exception 311 /// spec checks delayed, plus the overridden destructor. 312 SmallVector<std::pair<const CXXDestructorDecl*, 313 const CXXDestructorDecl*>, 2> 314 DelayedDestructorExceptionSpecChecks; 315 316 /// \brief Callback to the parser to parse templated functions when needed. 317 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 318 LateTemplateParserCB *LateTemplateParser; 319 void *OpaqueParser; 320 321 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 322 LateTemplateParser = LTP; 323 OpaqueParser = P; 324 } 325 326 class DelayedDiagnostics; 327 328 class ParsingDeclState { 329 unsigned SavedStackSize; 330 friend class Sema::DelayedDiagnostics; 331 }; 332 333 class ProcessingContextState { 334 unsigned SavedParsingDepth; 335 unsigned SavedActiveStackBase; 336 friend class Sema::DelayedDiagnostics; 337 }; 338 339 /// A class which encapsulates the logic for delaying diagnostics 340 /// during parsing and other processing. 341 class DelayedDiagnostics { 342 /// \brief The stack of diagnostics that were delayed due to being 343 /// produced during the parsing of a declaration. 344 sema::DelayedDiagnostic *Stack; 345 346 /// \brief The number of objects on the delayed-diagnostics stack. 347 unsigned StackSize; 348 349 /// \brief The current capacity of the delayed-diagnostics stack. 350 unsigned StackCapacity; 351 352 /// \brief The index of the first "active" delayed diagnostic in 353 /// the stack. When parsing class definitions, we ignore active 354 /// delayed diagnostics from the surrounding context. 355 unsigned ActiveStackBase; 356 357 /// \brief The depth of the declarations we're currently parsing. 358 /// This gets saved and reset whenever we enter a class definition. 359 unsigned ParsingDepth; 360 361 public: 362 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 363 ActiveStackBase(0), ParsingDepth(0) {} 364 365 ~DelayedDiagnostics() { 366 delete[] reinterpret_cast<char*>(Stack); 367 } 368 369 /// Adds a delayed diagnostic. 370 void add(const sema::DelayedDiagnostic &diag); 371 372 /// Determines whether diagnostics should be delayed. 373 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 374 375 /// Observe that we've started parsing a declaration. Access and 376 /// deprecation diagnostics will be delayed; when the declaration 377 /// is completed, all active delayed diagnostics will be evaluated 378 /// in its context, and then active diagnostics stack will be 379 /// popped down to the saved depth. 380 ParsingDeclState pushParsingDecl() { 381 ParsingDepth++; 382 383 ParsingDeclState state; 384 state.SavedStackSize = StackSize; 385 return state; 386 } 387 388 /// Observe that we're completed parsing a declaration. 389 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 390 391 /// Observe that we've started processing a different context, the 392 /// contents of which are semantically separate from the 393 /// declarations it may lexically appear in. This sets aside the 394 /// current stack of active diagnostics and starts afresh. 395 ProcessingContextState pushContext() { 396 assert(StackSize >= ActiveStackBase); 397 398 ProcessingContextState state; 399 state.SavedParsingDepth = ParsingDepth; 400 state.SavedActiveStackBase = ActiveStackBase; 401 402 ActiveStackBase = StackSize; 403 ParsingDepth = 0; 404 405 return state; 406 } 407 408 /// Observe that we've stopped processing a context. This 409 /// restores the previous stack of active diagnostics. 410 void popContext(ProcessingContextState state) { 411 assert(ActiveStackBase == StackSize); 412 assert(ParsingDepth == 0); 413 ActiveStackBase = state.SavedActiveStackBase; 414 ParsingDepth = state.SavedParsingDepth; 415 } 416 } DelayedDiagnostics; 417 418 /// A RAII object to temporarily push a declaration context. 419 class ContextRAII { 420 private: 421 Sema &S; 422 DeclContext *SavedContext; 423 ProcessingContextState SavedContextState; 424 425 public: 426 ContextRAII(Sema &S, DeclContext *ContextToPush) 427 : S(S), SavedContext(S.CurContext), 428 SavedContextState(S.DelayedDiagnostics.pushContext()) 429 { 430 assert(ContextToPush && "pushing null context"); 431 S.CurContext = ContextToPush; 432 } 433 434 void pop() { 435 if (!SavedContext) return; 436 S.CurContext = SavedContext; 437 S.DelayedDiagnostics.popContext(SavedContextState); 438 SavedContext = 0; 439 } 440 441 ~ContextRAII() { 442 pop(); 443 } 444 }; 445 446 /// WeakUndeclaredIdentifiers - Identifiers contained in 447 /// #pragma weak before declared. rare. may alias another 448 /// identifier, declared or undeclared 449 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 450 451 /// \brief Load weak undeclared identifiers from the external source. 452 void LoadExternalWeakUndeclaredIdentifiers(); 453 454 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 455 /// #pragma weak during processing of other Decls. 456 /// I couldn't figure out a clean way to generate these in-line, so 457 /// we store them here and handle separately -- which is a hack. 458 /// It would be best to refactor this. 459 SmallVector<Decl*,2> WeakTopLevelDecl; 460 461 IdentifierResolver IdResolver; 462 463 /// Translation Unit Scope - useful to Objective-C actions that need 464 /// to lookup file scope declarations in the "ordinary" C decl namespace. 465 /// For example, user-defined classes, built-in "id" type, etc. 466 Scope *TUScope; 467 468 /// \brief The C++ "std" namespace, where the standard library resides. 469 LazyDeclPtr StdNamespace; 470 471 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 472 /// standard library. 473 LazyDeclPtr StdBadAlloc; 474 475 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 476 RecordDecl *CXXTypeInfoDecl; 477 478 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 479 RecordDecl *MSVCGuidDecl; 480 481 /// A flag to remember whether the implicit forms of operator new and delete 482 /// have been declared. 483 bool GlobalNewDeleteDeclared; 484 485 486 /// A flag that is set when parsing a -dealloc method and no [super dealloc] 487 /// call was found yet. 488 bool ObjCShouldCallSuperDealloc; 489 /// A flag that is set when parsing a -finalize method and no [super finalize] 490 /// call was found yet. 491 bool ObjCShouldCallSuperFinalize; 492 493 /// \brief The set of declarations that have been referenced within 494 /// a potentially evaluated expression. 495 typedef SmallVector<std::pair<SourceLocation, Decl *>, 10> 496 PotentiallyReferencedDecls; 497 498 /// \brief A set of diagnostics that may be emitted. 499 typedef SmallVector<std::pair<SourceLocation, PartialDiagnostic>, 10> 500 PotentiallyEmittedDiagnostics; 501 502 /// \brief Describes how the expressions currently being parsed are 503 /// evaluated at run-time, if at all. 504 enum ExpressionEvaluationContext { 505 /// \brief The current expression and its subexpressions occur within an 506 /// unevaluated operand (C++0x [expr]p8), such as a constant expression 507 /// or the subexpression of \c sizeof, where the type or the value of the 508 /// expression may be significant but no code will be generated to evaluate 509 /// the value of the expression at run time. 510 Unevaluated, 511 512 /// \brief The current expression is potentially evaluated at run time, 513 /// which means that code may be generated to evaluate the value of the 514 /// expression at run time. 515 PotentiallyEvaluated, 516 517 /// \brief The current expression may be potentially evaluated or it may 518 /// be unevaluated, but it is impossible to tell from the lexical context. 519 /// This evaluation context is used primary for the operand of the C++ 520 /// \c typeid expression, whose argument is potentially evaluated only when 521 /// it is an lvalue of polymorphic class type (C++ [basic.def.odr]p2). 522 PotentiallyPotentiallyEvaluated, 523 524 /// \brief The current expression is potentially evaluated, but any 525 /// declarations referenced inside that expression are only used if 526 /// in fact the current expression is used. 527 /// 528 /// This value is used when parsing default function arguments, for which 529 /// we would like to provide diagnostics (e.g., passing non-POD arguments 530 /// through varargs) but do not want to mark declarations as "referenced" 531 /// until the default argument is used. 532 PotentiallyEvaluatedIfUsed 533 }; 534 535 /// \brief Data structure used to record current or nested 536 /// expression evaluation contexts. 537 struct ExpressionEvaluationContextRecord { 538 /// \brief The expression evaluation context. 539 ExpressionEvaluationContext Context; 540 541 /// \brief Whether the enclosing context needed a cleanup. 542 bool ParentNeedsCleanups; 543 544 /// \brief The number of temporaries that were active when we 545 /// entered this expression evaluation context. 546 unsigned NumTemporaries; 547 548 /// \brief The set of declarations referenced within a 549 /// potentially potentially-evaluated context. 550 /// 551 /// When leaving a potentially potentially-evaluated context, each 552 /// of these elements will be as referenced if the corresponding 553 /// potentially potentially evaluated expression is potentially 554 /// evaluated. 555 PotentiallyReferencedDecls *PotentiallyReferenced; 556 557 /// \brief The set of diagnostics to emit should this potentially 558 /// potentially-evaluated context become evaluated. 559 PotentiallyEmittedDiagnostics *PotentiallyDiagnosed; 560 561 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 562 unsigned NumTemporaries, 563 bool ParentNeedsCleanups) 564 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups), 565 NumTemporaries(NumTemporaries), 566 PotentiallyReferenced(0), PotentiallyDiagnosed(0) { } 567 568 void addReferencedDecl(SourceLocation Loc, Decl *Decl) { 569 if (!PotentiallyReferenced) 570 PotentiallyReferenced = new PotentiallyReferencedDecls; 571 PotentiallyReferenced->push_back(std::make_pair(Loc, Decl)); 572 } 573 574 void addDiagnostic(SourceLocation Loc, const PartialDiagnostic &PD) { 575 if (!PotentiallyDiagnosed) 576 PotentiallyDiagnosed = new PotentiallyEmittedDiagnostics; 577 PotentiallyDiagnosed->push_back(std::make_pair(Loc, PD)); 578 } 579 580 void Destroy() { 581 delete PotentiallyReferenced; 582 delete PotentiallyDiagnosed; 583 PotentiallyReferenced = 0; 584 PotentiallyDiagnosed = 0; 585 } 586 }; 587 588 /// A stack of expression evaluation contexts. 589 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 590 591 /// SpecialMemberOverloadResult - The overloading result for a special member 592 /// function. 593 /// 594 /// This is basically a wrapper around PointerIntPair. The lowest bit of the 595 /// integer is used to determine whether we have a parameter qualification 596 /// match, the second-lowest is whether we had success in resolving the 597 /// overload to a unique non-deleted function. 598 /// 599 /// The ConstParamMatch bit represents whether, when looking up a copy 600 /// constructor or assignment operator, we found a potential copy 601 /// constructor/assignment operator whose first parameter is const-qualified. 602 /// This is used for determining parameter types of other objects and is 603 /// utterly meaningless on other types of special members. 604 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 605 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 606 public: 607 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 608 : FastFoldingSetNode(ID) 609 {} 610 611 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 612 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 613 614 bool hasSuccess() const { return Pair.getInt() & 0x1; } 615 void setSuccess(bool B) { 616 Pair.setInt(unsigned(B) | hasConstParamMatch() << 1); 617 } 618 619 bool hasConstParamMatch() const { return Pair.getInt() & 0x2; } 620 void setConstParamMatch(bool B) { 621 Pair.setInt(B << 1 | unsigned(hasSuccess())); 622 } 623 }; 624 625 /// \brief A cache of special member function overload resolution results 626 /// for C++ records. 627 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 628 629 /// \brief The kind of translation unit we are processing. 630 /// 631 /// When we're processing a complete translation unit, Sema will perform 632 /// end-of-translation-unit semantic tasks (such as creating 633 /// initializers for tentative definitions in C) once parsing has 634 /// completed. Modules and precompiled headers perform different kinds of 635 /// checks. 636 TranslationUnitKind TUKind; 637 638 llvm::BumpPtrAllocator BumpAlloc; 639 640 /// \brief The number of SFINAE diagnostics that have been trapped. 641 unsigned NumSFINAEErrors; 642 643 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> > 644 UnparsedDefaultArgInstantiationsMap; 645 646 /// \brief A mapping from parameters with unparsed default arguments to the 647 /// set of instantiations of each parameter. 648 /// 649 /// This mapping is a temporary data structure used when parsing 650 /// nested class templates or nested classes of class templates, 651 /// where we might end up instantiating an inner class before the 652 /// default arguments of its methods have been parsed. 653 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 654 655 // Contains the locations of the beginning of unparsed default 656 // argument locations. 657 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 658 659 /// UndefinedInternals - all the used, undefined objects with 660 /// internal linkage in this translation unit. 661 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 662 663 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 664 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 665 666 /// Method Pool - allows efficient lookup when typechecking messages to "id". 667 /// We need to maintain a list, since selectors can have differing signatures 668 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 669 /// of selectors are "overloaded"). 670 GlobalMethodPool MethodPool; 671 672 /// Method selectors used in a @selector expression. Used for implementation 673 /// of -Wselector. 674 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 675 676 GlobalMethodPool::iterator ReadMethodPool(Selector Sel); 677 678 /// Private Helper predicate to check for 'self'. 679 bool isSelfExpr(Expr *RExpr); 680public: 681 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 682 TranslationUnitKind TUKind = TU_Complete, 683 CodeCompleteConsumer *CompletionConsumer = 0); 684 ~Sema(); 685 686 /// \brief Perform initialization that occurs after the parser has been 687 /// initialized but before it parses anything. 688 void Initialize(); 689 690 const LangOptions &getLangOptions() const { return LangOpts; } 691 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 692 FPOptions &getFPOptions() { return FPFeatures; } 693 694 Diagnostic &getDiagnostics() const { return Diags; } 695 SourceManager &getSourceManager() const { return SourceMgr; } 696 const TargetAttributesSema &getTargetAttributesSema() const; 697 Preprocessor &getPreprocessor() const { return PP; } 698 ASTContext &getASTContext() const { return Context; } 699 ASTConsumer &getASTConsumer() const { return Consumer; } 700 ASTMutationListener *getASTMutationListener() const; 701 702 void PrintStats() const; 703 704 /// \brief Helper class that creates diagnostics with optional 705 /// template instantiation stacks. 706 /// 707 /// This class provides a wrapper around the basic DiagnosticBuilder 708 /// class that emits diagnostics. SemaDiagnosticBuilder is 709 /// responsible for emitting the diagnostic (as DiagnosticBuilder 710 /// does) and, if the diagnostic comes from inside a template 711 /// instantiation, printing the template instantiation stack as 712 /// well. 713 class SemaDiagnosticBuilder : public DiagnosticBuilder { 714 Sema &SemaRef; 715 unsigned DiagID; 716 717 public: 718 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 719 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 720 721 explicit SemaDiagnosticBuilder(Sema &SemaRef) 722 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 723 724 ~SemaDiagnosticBuilder(); 725 }; 726 727 /// \brief Emit a diagnostic. 728 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 729 730 /// \brief Emit a partial diagnostic. 731 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 732 733 /// \brief Build a partial diagnostic. 734 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 735 736 bool findMacroSpelling(SourceLocation &loc, StringRef name); 737 738 ExprResult Owned(Expr* E) { return E; } 739 ExprResult Owned(ExprResult R) { return R; } 740 StmtResult Owned(Stmt* S) { return S; } 741 742 void ActOnEndOfTranslationUnit(); 743 744 void CheckDelegatingCtorCycles(); 745 746 Scope *getScopeForContext(DeclContext *Ctx); 747 748 void PushFunctionScope(); 749 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 750 void PopFunctionOrBlockScope(const sema::AnalysisBasedWarnings::Policy *WP =0, 751 const Decl *D = 0, const BlockExpr *blkExpr = 0); 752 753 sema::FunctionScopeInfo *getCurFunction() const { 754 return FunctionScopes.back(); 755 } 756 757 bool hasAnyUnrecoverableErrorsInThisFunction() const; 758 759 /// \brief Retrieve the current block, if any. 760 sema::BlockScopeInfo *getCurBlock(); 761 762 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 763 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 764 765 //===--------------------------------------------------------------------===// 766 // Type Analysis / Processing: SemaType.cpp. 767 // 768 769 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 770 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 771 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 772 } 773 QualType BuildPointerType(QualType T, 774 SourceLocation Loc, DeclarationName Entity); 775 QualType BuildReferenceType(QualType T, bool LValueRef, 776 SourceLocation Loc, DeclarationName Entity); 777 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 778 Expr *ArraySize, unsigned Quals, 779 SourceRange Brackets, DeclarationName Entity); 780 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 781 SourceLocation AttrLoc); 782 QualType BuildFunctionType(QualType T, 783 QualType *ParamTypes, unsigned NumParamTypes, 784 bool Variadic, unsigned Quals, 785 RefQualifierKind RefQualifier, 786 SourceLocation Loc, DeclarationName Entity, 787 FunctionType::ExtInfo Info); 788 QualType BuildMemberPointerType(QualType T, QualType Class, 789 SourceLocation Loc, 790 DeclarationName Entity); 791 QualType BuildBlockPointerType(QualType T, 792 SourceLocation Loc, DeclarationName Entity); 793 QualType BuildParenType(QualType T); 794 795 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); 796 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); 797 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 798 TypeSourceInfo *ReturnTypeInfo); 799 /// \brief Package the given type and TSI into a ParsedType. 800 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 801 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 802 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 803 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 804 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 805 bool CheckDistantExceptionSpec(QualType T); 806 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 807 bool CheckEquivalentExceptionSpec( 808 const FunctionProtoType *Old, SourceLocation OldLoc, 809 const FunctionProtoType *New, SourceLocation NewLoc); 810 bool CheckEquivalentExceptionSpec( 811 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 812 const FunctionProtoType *Old, SourceLocation OldLoc, 813 const FunctionProtoType *New, SourceLocation NewLoc, 814 bool *MissingExceptionSpecification = 0, 815 bool *MissingEmptyExceptionSpecification = 0, 816 bool AllowNoexceptAllMatchWithNoSpec = false, 817 bool IsOperatorNew = false); 818 bool CheckExceptionSpecSubset( 819 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 820 const FunctionProtoType *Superset, SourceLocation SuperLoc, 821 const FunctionProtoType *Subset, SourceLocation SubLoc); 822 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 823 const FunctionProtoType *Target, SourceLocation TargetLoc, 824 const FunctionProtoType *Source, SourceLocation SourceLoc); 825 826 TypeResult ActOnTypeName(Scope *S, Declarator &D); 827 828 /// \brief The parser has parsed the context-sensitive type 'instancetype' 829 /// in an Objective-C message declaration. Return the appropriate type. 830 ParsedType ActOnObjCInstanceType(SourceLocation Loc); 831 832 bool RequireCompleteType(SourceLocation Loc, QualType T, 833 const PartialDiagnostic &PD, 834 std::pair<SourceLocation, PartialDiagnostic> Note); 835 bool RequireCompleteType(SourceLocation Loc, QualType T, 836 const PartialDiagnostic &PD); 837 bool RequireCompleteType(SourceLocation Loc, QualType T, 838 unsigned DiagID); 839 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 840 std::pair<SourceLocation, 841 PartialDiagnostic> Note); 842 843 844 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 845 const CXXScopeSpec &SS, QualType T); 846 847 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 848 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 849 QualType BuildUnaryTransformType(QualType BaseType, 850 UnaryTransformType::UTTKind UKind, 851 SourceLocation Loc); 852 853 //===--------------------------------------------------------------------===// 854 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 855 // 856 857 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 858 859 void DiagnoseUseOfUnimplementedSelectors(); 860 861 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 862 Scope *S, CXXScopeSpec *SS = 0, 863 bool isClassName = false, 864 bool HasTrailingDot = false, 865 ParsedType ObjectType = ParsedType(), 866 bool WantNontrivialTypeSourceInfo = false); 867 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 868 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS); 869 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 870 SourceLocation IILoc, 871 Scope *S, 872 CXXScopeSpec *SS, 873 ParsedType &SuggestedType); 874 875 /// \brief Describes the result of the name lookup and resolution performed 876 /// by \c ClassifyName(). 877 enum NameClassificationKind { 878 NC_Unknown, 879 NC_Error, 880 NC_Keyword, 881 NC_Type, 882 NC_Expression, 883 NC_NestedNameSpecifier, 884 NC_TypeTemplate, 885 NC_FunctionTemplate 886 }; 887 888 class NameClassification { 889 NameClassificationKind Kind; 890 ExprResult Expr; 891 TemplateName Template; 892 ParsedType Type; 893 const IdentifierInfo *Keyword; 894 895 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 896 897 public: 898 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 899 900 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 901 902 NameClassification(const IdentifierInfo *Keyword) 903 : Kind(NC_Keyword), Keyword(Keyword) { } 904 905 static NameClassification Error() { 906 return NameClassification(NC_Error); 907 } 908 909 static NameClassification Unknown() { 910 return NameClassification(NC_Unknown); 911 } 912 913 static NameClassification NestedNameSpecifier() { 914 return NameClassification(NC_NestedNameSpecifier); 915 } 916 917 static NameClassification TypeTemplate(TemplateName Name) { 918 NameClassification Result(NC_TypeTemplate); 919 Result.Template = Name; 920 return Result; 921 } 922 923 static NameClassification FunctionTemplate(TemplateName Name) { 924 NameClassification Result(NC_FunctionTemplate); 925 Result.Template = Name; 926 return Result; 927 } 928 929 NameClassificationKind getKind() const { return Kind; } 930 931 ParsedType getType() const { 932 assert(Kind == NC_Type); 933 return Type; 934 } 935 936 ExprResult getExpression() const { 937 assert(Kind == NC_Expression); 938 return Expr; 939 } 940 941 TemplateName getTemplateName() const { 942 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 943 return Template; 944 } 945 946 TemplateNameKind getTemplateNameKind() const { 947 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 948 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 949 } 950}; 951 952 /// \brief Perform name lookup on the given name, classifying it based on 953 /// the results of name lookup and the following token. 954 /// 955 /// This routine is used by the parser to resolve identifiers and help direct 956 /// parsing. When the identifier cannot be found, this routine will attempt 957 /// to correct the typo and classify based on the resulting name. 958 /// 959 /// \param S The scope in which we're performing name lookup. 960 /// 961 /// \param SS The nested-name-specifier that precedes the name. 962 /// 963 /// \param Name The identifier. If typo correction finds an alternative name, 964 /// this pointer parameter will be updated accordingly. 965 /// 966 /// \param NameLoc The location of the identifier. 967 /// 968 /// \param NextToken The token following the identifier. Used to help 969 /// disambiguate the name. 970 NameClassification ClassifyName(Scope *S, 971 CXXScopeSpec &SS, 972 IdentifierInfo *&Name, 973 SourceLocation NameLoc, 974 const Token &NextToken); 975 976 Decl *ActOnDeclarator(Scope *S, Declarator &D); 977 978 Decl *HandleDeclarator(Scope *S, Declarator &D, 979 MultiTemplateParamsArg TemplateParameterLists, 980 bool IsFunctionDefinition); 981 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 982 const LookupResult &Previous, 983 Scope *S); 984 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 985 void DiagnoseFunctionSpecifiers(Declarator& D); 986 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 987 void CheckShadow(Scope *S, VarDecl *D); 988 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 989 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 990 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 991 QualType R, TypeSourceInfo *TInfo, 992 LookupResult &Previous, bool &Redeclaration); 993 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 994 LookupResult &Previous, bool &Redeclaration); 995 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 996 QualType R, TypeSourceInfo *TInfo, 997 LookupResult &Previous, 998 MultiTemplateParamsArg TemplateParamLists, 999 bool &Redeclaration); 1000 void CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous, 1001 bool &Redeclaration); 1002 void CheckCompleteVariableDeclaration(VarDecl *var); 1003 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1004 QualType R, TypeSourceInfo *TInfo, 1005 LookupResult &Previous, 1006 MultiTemplateParamsArg TemplateParamLists, 1007 bool IsFunctionDefinition, 1008 bool &Redeclaration, 1009 bool &AddToScope); 1010 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1011 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1012 void CheckFunctionDeclaration(Scope *S, 1013 FunctionDecl *NewFD, LookupResult &Previous, 1014 bool IsExplicitSpecialization, 1015 bool &Redeclaration); 1016 void CheckMain(FunctionDecl *FD, const DeclSpec &D); 1017 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1018 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1019 SourceLocation Loc, 1020 QualType T); 1021 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1022 SourceLocation NameLoc, IdentifierInfo *Name, 1023 QualType T, TypeSourceInfo *TSInfo, 1024 StorageClass SC, StorageClass SCAsWritten); 1025 void ActOnParamDefaultArgument(Decl *param, 1026 SourceLocation EqualLoc, 1027 Expr *defarg); 1028 void ActOnParamUnparsedDefaultArgument(Decl *param, 1029 SourceLocation EqualLoc, 1030 SourceLocation ArgLoc); 1031 void ActOnParamDefaultArgumentError(Decl *param); 1032 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1033 SourceLocation EqualLoc); 1034 1035 void CheckSelfReference(Decl *OrigDecl, Expr *E); 1036 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1037 bool TypeMayContainAuto); 1038 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1039 void ActOnInitializerError(Decl *Dcl); 1040 void ActOnCXXForRangeDecl(Decl *D); 1041 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1042 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1043 void FinalizeDeclaration(Decl *D); 1044 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1045 Decl **Group, 1046 unsigned NumDecls); 1047 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1048 bool TypeMayContainAuto = true); 1049 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1050 SourceLocation LocAfterDecls); 1051 void CheckForFunctionRedefinition(FunctionDecl *FD); 1052 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1053 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1054 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1055 1056 void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope); 1057 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1058 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1059 1060 /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an 1061 /// attribute for which parsing is delayed. 1062 void ActOnFinishDelayedAttribute(Scope *S, Decl *D, ParsedAttributes &Attrs); 1063 1064 /// \brief Diagnose any unused parameters in the given sequence of 1065 /// ParmVarDecl pointers. 1066 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1067 ParmVarDecl * const *End); 1068 1069 /// \brief Diagnose whether the size of parameters or return value of a 1070 /// function or obj-c method definition is pass-by-value and larger than a 1071 /// specified threshold. 1072 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1073 ParmVarDecl * const *End, 1074 QualType ReturnTy, 1075 NamedDecl *D); 1076 1077 void DiagnoseInvalidJumps(Stmt *Body); 1078 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1079 SourceLocation AsmLoc, 1080 SourceLocation RParenLoc); 1081 1082 /// \brief The parser has processed a module import declaration. 1083 /// 1084 /// \param ImportLoc The location of the '__import_module__' keyword. 1085 /// 1086 /// \param ModuleName The name of the module. 1087 /// 1088 /// \param ModuleNameLoc The location of the module name. 1089 DeclResult ActOnModuleImport(SourceLocation ImportLoc, 1090 IdentifierInfo &ModuleName, 1091 SourceLocation ModuleNameLoc); 1092 1093 /// \brief Diagnose that \p New is a module-private redeclaration of 1094 /// \p Old. 1095 void diagnoseModulePrivateRedeclaration(NamedDecl *New, NamedDecl *Old, 1096 SourceLocation ModulePrivateKeyword 1097 = SourceLocation()); 1098 1099 /// Scope actions. 1100 void ActOnPopScope(SourceLocation Loc, Scope *S); 1101 void ActOnTranslationUnitScope(Scope *S); 1102 1103 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1104 DeclSpec &DS); 1105 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1106 DeclSpec &DS, 1107 MultiTemplateParamsArg TemplateParams); 1108 1109 StmtResult ActOnVlaStmt(const DeclSpec &DS); 1110 1111 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1112 AccessSpecifier AS, 1113 RecordDecl *Record); 1114 1115 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1116 RecordDecl *Record); 1117 1118 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1119 TagTypeKind NewTag, bool isDefinition, 1120 SourceLocation NewTagLoc, 1121 const IdentifierInfo &Name); 1122 1123 enum TagUseKind { 1124 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1125 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1126 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1127 TUK_Friend // Friend declaration: 'friend struct foo;' 1128 }; 1129 1130 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1131 SourceLocation KWLoc, CXXScopeSpec &SS, 1132 IdentifierInfo *Name, SourceLocation NameLoc, 1133 AttributeList *Attr, AccessSpecifier AS, 1134 SourceLocation ModulePrivateLoc, 1135 MultiTemplateParamsArg TemplateParameterLists, 1136 bool &OwnedDecl, bool &IsDependent, bool ScopedEnum, 1137 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1138 1139 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1140 unsigned TagSpec, SourceLocation TagLoc, 1141 CXXScopeSpec &SS, 1142 IdentifierInfo *Name, SourceLocation NameLoc, 1143 AttributeList *Attr, 1144 MultiTemplateParamsArg TempParamLists); 1145 1146 TypeResult ActOnDependentTag(Scope *S, 1147 unsigned TagSpec, 1148 TagUseKind TUK, 1149 const CXXScopeSpec &SS, 1150 IdentifierInfo *Name, 1151 SourceLocation TagLoc, 1152 SourceLocation NameLoc); 1153 1154 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1155 IdentifierInfo *ClassName, 1156 SmallVectorImpl<Decl *> &Decls); 1157 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1158 Declarator &D, Expr *BitfieldWidth); 1159 1160 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1161 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1162 AccessSpecifier AS); 1163 1164 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1165 TypeSourceInfo *TInfo, 1166 RecordDecl *Record, SourceLocation Loc, 1167 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1168 SourceLocation TSSL, 1169 AccessSpecifier AS, NamedDecl *PrevDecl, 1170 Declarator *D = 0); 1171 1172 enum CXXSpecialMember { 1173 CXXDefaultConstructor, 1174 CXXCopyConstructor, 1175 CXXMoveConstructor, 1176 CXXCopyAssignment, 1177 CXXMoveAssignment, 1178 CXXDestructor, 1179 CXXInvalid 1180 }; 1181 bool CheckNontrivialField(FieldDecl *FD); 1182 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1183 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1184 void ActOnLastBitfield(SourceLocation DeclStart, 1185 SmallVectorImpl<Decl *> &AllIvarDecls); 1186 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, 1187 Declarator &D, Expr *BitfieldWidth, 1188 tok::ObjCKeywordKind visibility); 1189 1190 // This is used for both record definitions and ObjC interface declarations. 1191 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1192 Decl **Fields, unsigned NumFields, 1193 SourceLocation LBrac, SourceLocation RBrac, 1194 AttributeList *AttrList); 1195 1196 /// ActOnTagStartDefinition - Invoked when we have entered the 1197 /// scope of a tag's definition (e.g., for an enumeration, class, 1198 /// struct, or union). 1199 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1200 1201 void ActOnObjCContainerStartDefinition(Decl *IDecl); 1202 1203 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1204 /// C++ record definition's base-specifiers clause and are starting its 1205 /// member declarations. 1206 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1207 SourceLocation FinalLoc, 1208 SourceLocation LBraceLoc); 1209 1210 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1211 /// the definition of a tag (enumeration, class, struct, or union). 1212 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1213 SourceLocation RBraceLoc); 1214 1215 void ActOnObjCContainerFinishDefinition(); 1216 1217 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1218 /// error parsing the definition of a tag. 1219 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1220 1221 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1222 EnumConstantDecl *LastEnumConst, 1223 SourceLocation IdLoc, 1224 IdentifierInfo *Id, 1225 Expr *val); 1226 1227 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1228 SourceLocation IdLoc, IdentifierInfo *Id, 1229 AttributeList *Attrs, 1230 SourceLocation EqualLoc, Expr *Val); 1231 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1232 SourceLocation RBraceLoc, Decl *EnumDecl, 1233 Decl **Elements, unsigned NumElements, 1234 Scope *S, AttributeList *Attr); 1235 1236 DeclContext *getContainingDC(DeclContext *DC); 1237 1238 /// Set the current declaration context until it gets popped. 1239 void PushDeclContext(Scope *S, DeclContext *DC); 1240 void PopDeclContext(); 1241 1242 /// EnterDeclaratorContext - Used when we must lookup names in the context 1243 /// of a declarator's nested name specifier. 1244 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1245 void ExitDeclaratorContext(Scope *S); 1246 1247 /// Push the parameters of D, which must be a function, into scope. 1248 void ActOnReenterFunctionContext(Scope* S, Decl* D); 1249 void ActOnExitFunctionContext() { PopDeclContext(); } 1250 1251 DeclContext *getFunctionLevelDeclContext(); 1252 1253 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1254 /// to the function decl for the function being parsed. If we're currently 1255 /// in a 'block', this returns the containing context. 1256 FunctionDecl *getCurFunctionDecl(); 1257 1258 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1259 /// the method decl for the method being parsed. If we're currently 1260 /// in a 'block', this returns the containing context. 1261 ObjCMethodDecl *getCurMethodDecl(); 1262 1263 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1264 /// or C function we're in, otherwise return null. If we're currently 1265 /// in a 'block', this returns the containing context. 1266 NamedDecl *getCurFunctionOrMethodDecl(); 1267 1268 /// Add this decl to the scope shadowed decl chains. 1269 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1270 1271 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1272 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1273 /// true if 'D' belongs to the given declaration context. 1274 /// 1275 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1276 /// whether the declaration is in scope for the purposes of explicit template 1277 /// instantiation or specialization. The default is false. 1278 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1279 bool ExplicitInstantiationOrSpecialization = false); 1280 1281 /// Finds the scope corresponding to the given decl context, if it 1282 /// happens to be an enclosing scope. Otherwise return NULL. 1283 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1284 1285 /// Subroutines of ActOnDeclarator(). 1286 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1287 TypeSourceInfo *TInfo); 1288 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1289 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1290 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1291 void mergeObjCMethodDecls(ObjCMethodDecl *New, const ObjCMethodDecl *Old); 1292 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1293 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1294 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1295 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1296 1297 // AssignmentAction - This is used by all the assignment diagnostic functions 1298 // to represent what is actually causing the operation 1299 enum AssignmentAction { 1300 AA_Assigning, 1301 AA_Passing, 1302 AA_Returning, 1303 AA_Converting, 1304 AA_Initializing, 1305 AA_Sending, 1306 AA_Casting 1307 }; 1308 1309 /// C++ Overloading. 1310 enum OverloadKind { 1311 /// This is a legitimate overload: the existing declarations are 1312 /// functions or function templates with different signatures. 1313 Ovl_Overload, 1314 1315 /// This is not an overload because the signature exactly matches 1316 /// an existing declaration. 1317 Ovl_Match, 1318 1319 /// This is not an overload because the lookup results contain a 1320 /// non-function. 1321 Ovl_NonFunction 1322 }; 1323 OverloadKind CheckOverload(Scope *S, 1324 FunctionDecl *New, 1325 const LookupResult &OldDecls, 1326 NamedDecl *&OldDecl, 1327 bool IsForUsingDecl); 1328 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1329 1330 /// \brief Checks availability of the function depending on the current 1331 /// function context.Inside an unavailable function,unavailability is ignored. 1332 /// 1333 /// \returns true if \arg FD is unavailable and current context is inside 1334 /// an available function, false otherwise. 1335 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1336 1337 ImplicitConversionSequence 1338 TryImplicitConversion(Expr *From, QualType ToType, 1339 bool SuppressUserConversions, 1340 bool AllowExplicit, 1341 bool InOverloadResolution, 1342 bool CStyle, 1343 bool AllowObjCWritebackConversion); 1344 1345 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1346 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1347 bool IsComplexPromotion(QualType FromType, QualType ToType); 1348 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1349 bool InOverloadResolution, 1350 QualType& ConvertedType, bool &IncompatibleObjC); 1351 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1352 QualType& ConvertedType, bool &IncompatibleObjC); 1353 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1354 QualType &ConvertedType); 1355 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1356 QualType& ConvertedType); 1357 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1358 const FunctionProtoType *NewType); 1359 1360 bool CheckPointerConversion(Expr *From, QualType ToType, 1361 CastKind &Kind, 1362 CXXCastPath& BasePath, 1363 bool IgnoreBaseAccess); 1364 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1365 bool InOverloadResolution, 1366 QualType &ConvertedType); 1367 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1368 CastKind &Kind, 1369 CXXCastPath &BasePath, 1370 bool IgnoreBaseAccess); 1371 bool IsQualificationConversion(QualType FromType, QualType ToType, 1372 bool CStyle, bool &ObjCLifetimeConversion); 1373 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1374 QualType &ResultTy); 1375 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1376 1377 1378 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1379 const VarDecl *NRVOCandidate, 1380 QualType ResultType, 1381 Expr *Value, 1382 bool AllowNRVO = true); 1383 1384 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1385 ExprResult Init); 1386 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1387 SourceLocation EqualLoc, 1388 ExprResult Init, 1389 bool TopLevelOfInitList = false); 1390 ExprResult PerformObjectArgumentInitialization(Expr *From, 1391 NestedNameSpecifier *Qualifier, 1392 NamedDecl *FoundDecl, 1393 CXXMethodDecl *Method); 1394 1395 ExprResult PerformContextuallyConvertToBool(Expr *From); 1396 ExprResult PerformContextuallyConvertToObjCPointer(Expr *From); 1397 1398 ExprResult 1399 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1400 const PartialDiagnostic &NotIntDiag, 1401 const PartialDiagnostic &IncompleteDiag, 1402 const PartialDiagnostic &ExplicitConvDiag, 1403 const PartialDiagnostic &ExplicitConvNote, 1404 const PartialDiagnostic &AmbigDiag, 1405 const PartialDiagnostic &AmbigNote, 1406 const PartialDiagnostic &ConvDiag); 1407 1408 ExprResult PerformObjectMemberConversion(Expr *From, 1409 NestedNameSpecifier *Qualifier, 1410 NamedDecl *FoundDecl, 1411 NamedDecl *Member); 1412 1413 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1414 // TODO: make this is a typesafe union. 1415 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1416 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1417 1418 void AddOverloadCandidate(NamedDecl *Function, 1419 DeclAccessPair FoundDecl, 1420 Expr **Args, unsigned NumArgs, 1421 OverloadCandidateSet &CandidateSet); 1422 1423 void AddOverloadCandidate(FunctionDecl *Function, 1424 DeclAccessPair FoundDecl, 1425 Expr **Args, unsigned NumArgs, 1426 OverloadCandidateSet& CandidateSet, 1427 bool SuppressUserConversions = false, 1428 bool PartialOverloading = false); 1429 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1430 Expr **Args, unsigned NumArgs, 1431 OverloadCandidateSet& CandidateSet, 1432 bool SuppressUserConversions = false); 1433 void AddMethodCandidate(DeclAccessPair FoundDecl, 1434 QualType ObjectType, 1435 Expr::Classification ObjectClassification, 1436 Expr **Args, unsigned NumArgs, 1437 OverloadCandidateSet& CandidateSet, 1438 bool SuppressUserConversion = false); 1439 void AddMethodCandidate(CXXMethodDecl *Method, 1440 DeclAccessPair FoundDecl, 1441 CXXRecordDecl *ActingContext, QualType ObjectType, 1442 Expr::Classification ObjectClassification, 1443 Expr **Args, unsigned NumArgs, 1444 OverloadCandidateSet& CandidateSet, 1445 bool SuppressUserConversions = false); 1446 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1447 DeclAccessPair FoundDecl, 1448 CXXRecordDecl *ActingContext, 1449 TemplateArgumentListInfo *ExplicitTemplateArgs, 1450 QualType ObjectType, 1451 Expr::Classification ObjectClassification, 1452 Expr **Args, unsigned NumArgs, 1453 OverloadCandidateSet& CandidateSet, 1454 bool SuppressUserConversions = false); 1455 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1456 DeclAccessPair FoundDecl, 1457 TemplateArgumentListInfo *ExplicitTemplateArgs, 1458 Expr **Args, unsigned NumArgs, 1459 OverloadCandidateSet& CandidateSet, 1460 bool SuppressUserConversions = false); 1461 void AddConversionCandidate(CXXConversionDecl *Conversion, 1462 DeclAccessPair FoundDecl, 1463 CXXRecordDecl *ActingContext, 1464 Expr *From, QualType ToType, 1465 OverloadCandidateSet& CandidateSet); 1466 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1467 DeclAccessPair FoundDecl, 1468 CXXRecordDecl *ActingContext, 1469 Expr *From, QualType ToType, 1470 OverloadCandidateSet &CandidateSet); 1471 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1472 DeclAccessPair FoundDecl, 1473 CXXRecordDecl *ActingContext, 1474 const FunctionProtoType *Proto, 1475 Expr *Object, Expr **Args, unsigned NumArgs, 1476 OverloadCandidateSet& CandidateSet); 1477 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1478 SourceLocation OpLoc, 1479 Expr **Args, unsigned NumArgs, 1480 OverloadCandidateSet& CandidateSet, 1481 SourceRange OpRange = SourceRange()); 1482 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1483 Expr **Args, unsigned NumArgs, 1484 OverloadCandidateSet& CandidateSet, 1485 bool IsAssignmentOperator = false, 1486 unsigned NumContextualBoolArguments = 0); 1487 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1488 SourceLocation OpLoc, 1489 Expr **Args, unsigned NumArgs, 1490 OverloadCandidateSet& CandidateSet); 1491 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1492 bool Operator, 1493 Expr **Args, unsigned NumArgs, 1494 TemplateArgumentListInfo *ExplicitTemplateArgs, 1495 OverloadCandidateSet& CandidateSet, 1496 bool PartialOverloading = false, 1497 bool StdNamespaceIsAssociated = false); 1498 1499 // Emit as a 'note' the specific overload candidate 1500 void NoteOverloadCandidate(FunctionDecl *Fn); 1501 1502 // Emit as a series of 'note's all template and non-templates 1503 // identified by the expression Expr 1504 void NoteAllOverloadCandidates(Expr* E); 1505 1506 // [PossiblyAFunctionType] --> [Return] 1507 // NonFunctionType --> NonFunctionType 1508 // R (A) --> R(A) 1509 // R (*)(A) --> R (A) 1510 // R (&)(A) --> R (A) 1511 // R (S::*)(A) --> R (A) 1512 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1513 1514 FunctionDecl *ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, QualType TargetType, 1515 bool Complain, 1516 DeclAccessPair &Found); 1517 1518 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1519 bool Complain = false, 1520 DeclAccessPair* Found = 0); 1521 1522 ExprResult ResolveAndFixSingleFunctionTemplateSpecialization( 1523 Expr *SrcExpr, bool DoFunctionPointerConverion = false, 1524 bool Complain = false, 1525 const SourceRange& OpRangeForComplaining = SourceRange(), 1526 QualType DestTypeForComplaining = QualType(), 1527 unsigned DiagIDForComplaining = 0); 1528 1529 1530 Expr *FixOverloadedFunctionReference(Expr *E, 1531 DeclAccessPair FoundDecl, 1532 FunctionDecl *Fn); 1533 ExprResult FixOverloadedFunctionReference(ExprResult, 1534 DeclAccessPair FoundDecl, 1535 FunctionDecl *Fn); 1536 1537 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1538 Expr **Args, unsigned NumArgs, 1539 OverloadCandidateSet &CandidateSet, 1540 bool PartialOverloading = false); 1541 1542 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1543 UnresolvedLookupExpr *ULE, 1544 SourceLocation LParenLoc, 1545 Expr **Args, unsigned NumArgs, 1546 SourceLocation RParenLoc, 1547 Expr *ExecConfig); 1548 1549 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1550 unsigned Opc, 1551 const UnresolvedSetImpl &Fns, 1552 Expr *input); 1553 1554 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1555 unsigned Opc, 1556 const UnresolvedSetImpl &Fns, 1557 Expr *LHS, Expr *RHS); 1558 1559 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1560 SourceLocation RLoc, 1561 Expr *Base,Expr *Idx); 1562 1563 ExprResult 1564 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1565 SourceLocation LParenLoc, Expr **Args, 1566 unsigned NumArgs, SourceLocation RParenLoc); 1567 ExprResult 1568 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1569 Expr **Args, unsigned NumArgs, 1570 SourceLocation RParenLoc); 1571 1572 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1573 SourceLocation OpLoc); 1574 1575 /// CheckCallReturnType - Checks that a call expression's return type is 1576 /// complete. Returns true on failure. The location passed in is the location 1577 /// that best represents the call. 1578 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1579 CallExpr *CE, FunctionDecl *FD); 1580 1581 /// Helpers for dealing with blocks and functions. 1582 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1583 bool CheckParameterNames); 1584 void CheckCXXDefaultArguments(FunctionDecl *FD); 1585 void CheckExtraCXXDefaultArguments(Declarator &D); 1586 Scope *getNonFieldDeclScope(Scope *S); 1587 1588 /// \name Name lookup 1589 /// 1590 /// These routines provide name lookup that is used during semantic 1591 /// analysis to resolve the various kinds of names (identifiers, 1592 /// overloaded operator names, constructor names, etc.) into zero or 1593 /// more declarations within a particular scope. The major entry 1594 /// points are LookupName, which performs unqualified name lookup, 1595 /// and LookupQualifiedName, which performs qualified name lookup. 1596 /// 1597 /// All name lookup is performed based on some specific criteria, 1598 /// which specify what names will be visible to name lookup and how 1599 /// far name lookup should work. These criteria are important both 1600 /// for capturing language semantics (certain lookups will ignore 1601 /// certain names, for example) and for performance, since name 1602 /// lookup is often a bottleneck in the compilation of C++. Name 1603 /// lookup criteria is specified via the LookupCriteria enumeration. 1604 /// 1605 /// The results of name lookup can vary based on the kind of name 1606 /// lookup performed, the current language, and the translation 1607 /// unit. In C, for example, name lookup will either return nothing 1608 /// (no entity found) or a single declaration. In C++, name lookup 1609 /// can additionally refer to a set of overloaded functions or 1610 /// result in an ambiguity. All of the possible results of name 1611 /// lookup are captured by the LookupResult class, which provides 1612 /// the ability to distinguish among them. 1613 //@{ 1614 1615 /// @brief Describes the kind of name lookup to perform. 1616 enum LookupNameKind { 1617 /// Ordinary name lookup, which finds ordinary names (functions, 1618 /// variables, typedefs, etc.) in C and most kinds of names 1619 /// (functions, variables, members, types, etc.) in C++. 1620 LookupOrdinaryName = 0, 1621 /// Tag name lookup, which finds the names of enums, classes, 1622 /// structs, and unions. 1623 LookupTagName, 1624 /// Label name lookup. 1625 LookupLabel, 1626 /// Member name lookup, which finds the names of 1627 /// class/struct/union members. 1628 LookupMemberName, 1629 /// Look up of an operator name (e.g., operator+) for use with 1630 /// operator overloading. This lookup is similar to ordinary name 1631 /// lookup, but will ignore any declarations that are class members. 1632 LookupOperatorName, 1633 /// Look up of a name that precedes the '::' scope resolution 1634 /// operator in C++. This lookup completely ignores operator, object, 1635 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1636 LookupNestedNameSpecifierName, 1637 /// Look up a namespace name within a C++ using directive or 1638 /// namespace alias definition, ignoring non-namespace names (C++ 1639 /// [basic.lookup.udir]p1). 1640 LookupNamespaceName, 1641 /// Look up all declarations in a scope with the given name, 1642 /// including resolved using declarations. This is appropriate 1643 /// for checking redeclarations for a using declaration. 1644 LookupUsingDeclName, 1645 /// Look up an ordinary name that is going to be redeclared as a 1646 /// name with linkage. This lookup ignores any declarations that 1647 /// are outside of the current scope unless they have linkage. See 1648 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1649 LookupRedeclarationWithLinkage, 1650 /// Look up the name of an Objective-C protocol. 1651 LookupObjCProtocolName, 1652 /// Look up implicit 'self' parameter of an objective-c method. 1653 LookupObjCImplicitSelfParam, 1654 /// \brief Look up any declaration with any name. 1655 LookupAnyName 1656 }; 1657 1658 /// \brief Specifies whether (or how) name lookup is being performed for a 1659 /// redeclaration (vs. a reference). 1660 enum RedeclarationKind { 1661 /// \brief The lookup is a reference to this name that is not for the 1662 /// purpose of redeclaring the name. 1663 NotForRedeclaration = 0, 1664 /// \brief The lookup results will be used for redeclaration of a name, 1665 /// if an entity by that name already exists. 1666 ForRedeclaration 1667 }; 1668 1669private: 1670 bool CppLookupName(LookupResult &R, Scope *S); 1671 1672 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1673 CXXSpecialMember SM, 1674 bool ConstArg, 1675 bool VolatileArg, 1676 bool RValueThis, 1677 bool ConstThis, 1678 bool VolatileThis); 1679 1680 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1681 // 1682 // The boolean value will be true to indicate that the namespace was loaded 1683 // from an AST/PCH file, or false otherwise. 1684 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1685 1686 /// \brief Whether we have already loaded known namespaces from an extenal 1687 /// source. 1688 bool LoadedExternalKnownNamespaces; 1689 1690public: 1691 /// \brief Look up a name, looking for a single declaration. Return 1692 /// null if the results were absent, ambiguous, or overloaded. 1693 /// 1694 /// It is preferable to use the elaborated form and explicitly handle 1695 /// ambiguity and overloaded. 1696 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1697 SourceLocation Loc, 1698 LookupNameKind NameKind, 1699 RedeclarationKind Redecl 1700 = NotForRedeclaration); 1701 bool LookupName(LookupResult &R, Scope *S, 1702 bool AllowBuiltinCreation = false); 1703 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1704 bool InUnqualifiedLookup = false); 1705 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1706 bool AllowBuiltinCreation = false, 1707 bool EnteringContext = false); 1708 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1709 1710 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1711 QualType T1, QualType T2, 1712 UnresolvedSetImpl &Functions); 1713 1714 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1715 SourceLocation GnuLabelLoc = SourceLocation()); 1716 1717 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1718 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1719 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1720 unsigned Quals, 1721 bool *ConstParam = 0); 1722 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1723 bool RValueThis, unsigned ThisQuals, 1724 bool *ConstParam = 0); 1725 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class); 1726 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, bool RValueThis, 1727 unsigned ThisQuals); 1728 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1729 1730 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1731 Expr **Args, unsigned NumArgs, 1732 ADLResult &Functions, 1733 bool StdNamespaceIsAssociated = false); 1734 1735 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1736 VisibleDeclConsumer &Consumer, 1737 bool IncludeGlobalScope = true); 1738 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1739 VisibleDeclConsumer &Consumer, 1740 bool IncludeGlobalScope = true); 1741 1742 /// \brief The context in which typo-correction occurs. 1743 /// 1744 /// The typo-correction context affects which keywords (if any) are 1745 /// considered when trying to correct for typos. 1746 enum CorrectTypoContext { 1747 /// \brief An unknown context, where any keyword might be valid. 1748 CTC_Unknown, 1749 /// \brief A context where no keywords are used (e.g. we expect an actual 1750 /// name). 1751 CTC_NoKeywords, 1752 /// \brief A context where we're correcting a type name. 1753 CTC_Type, 1754 /// \brief An expression context. 1755 CTC_Expression, 1756 /// \brief A type cast, or anything else that can be followed by a '<'. 1757 CTC_CXXCasts, 1758 /// \brief A member lookup context. 1759 CTC_MemberLookup, 1760 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1761 CTC_ObjCIvarLookup, 1762 /// \brief An Objective-C property lookup context (e.g., self.prop). 1763 CTC_ObjCPropertyLookup, 1764 /// \brief The receiver of an Objective-C message send within an 1765 /// Objective-C method where 'super' is a valid keyword. 1766 CTC_ObjCMessageReceiver 1767 }; 1768 1769 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1770 Sema::LookupNameKind LookupKind, 1771 Scope *S, CXXScopeSpec *SS, 1772 DeclContext *MemberContext = NULL, 1773 bool EnteringContext = false, 1774 CorrectTypoContext CTC = CTC_Unknown, 1775 const ObjCObjectPointerType *OPT = NULL); 1776 1777 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1778 AssociatedNamespaceSet &AssociatedNamespaces, 1779 AssociatedClassSet &AssociatedClasses); 1780 1781 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1782 bool ConsiderLinkage, 1783 bool ExplicitInstantiationOrSpecialization); 1784 1785 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1786 //@} 1787 1788 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1789 SourceLocation IdLoc, 1790 bool TypoCorrection = false); 1791 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1792 Scope *S, bool ForRedeclaration, 1793 SourceLocation Loc); 1794 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1795 Scope *S); 1796 void AddKnownFunctionAttributes(FunctionDecl *FD); 1797 1798 // More parsing and symbol table subroutines. 1799 1800 // Decl attributes - this routine is the top level dispatcher. 1801 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1802 bool NonInheritable = true, bool Inheritable = true); 1803 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1804 bool NonInheritable = true, bool Inheritable = true); 1805 1806 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1807 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1808 bool CheckNoReturnAttr(const AttributeList &attr); 1809 1810 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1811 bool &IncompleteImpl, unsigned DiagID); 1812 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 1813 ObjCMethodDecl *MethodDecl, 1814 bool IsProtocolMethodDecl, 1815 bool IsDeclaration = false); 1816 1817 /// WarnExactTypedMethods - This routine issues a warning if method 1818 /// implementation declaration matches exactly that of its declaration. 1819 void WarnExactTypedMethods(ObjCMethodDecl *Method, 1820 ObjCMethodDecl *MethodDecl, 1821 bool IsProtocolMethodDecl); 1822 1823 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1824 ObjCInterfaceDecl *IDecl); 1825 1826 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1827 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap; 1828 1829 /// CheckProtocolMethodDefs - This routine checks unimplemented 1830 /// methods declared in protocol, and those referenced by it. 1831 /// \param IDecl - Used for checking for methods which may have been 1832 /// inherited. 1833 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1834 ObjCProtocolDecl *PDecl, 1835 bool& IncompleteImpl, 1836 const SelectorSet &InsMap, 1837 const SelectorSet &ClsMap, 1838 ObjCContainerDecl *CDecl); 1839 1840 /// CheckImplementationIvars - This routine checks if the instance variables 1841 /// listed in the implelementation match those listed in the interface. 1842 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1843 ObjCIvarDecl **Fields, unsigned nIvars, 1844 SourceLocation Loc); 1845 1846 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1847 /// remains unimplemented in the class or category @implementation. 1848 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1849 ObjCContainerDecl* IDecl, 1850 bool IncompleteImpl = false); 1851 1852 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1853 /// which must be implemented by this implementation. 1854 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1855 ObjCContainerDecl *CDecl, 1856 const SelectorSet &InsMap); 1857 1858 /// DefaultSynthesizeProperties - This routine default synthesizes all 1859 /// properties which must be synthesized in class's @implementation. 1860 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1861 ObjCInterfaceDecl *IDecl); 1862 void DefaultSynthesizeProperties(Scope *S, Decl *D); 1863 1864 /// CollectImmediateProperties - This routine collects all properties in 1865 /// the class and its conforming protocols; but not those it its super class. 1866 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1867 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1868 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1869 1870 1871 /// LookupPropertyDecl - Looks up a property in the current class and all 1872 /// its protocols. 1873 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1874 IdentifierInfo *II); 1875 1876 /// Called by ActOnProperty to handle @property declarations in 1877 //// class extensions. 1878 Decl *HandlePropertyInClassExtension(Scope *S, 1879 SourceLocation AtLoc, 1880 FieldDeclarator &FD, 1881 Selector GetterSel, 1882 Selector SetterSel, 1883 const bool isAssign, 1884 const bool isReadWrite, 1885 const unsigned Attributes, 1886 bool *isOverridingProperty, 1887 TypeSourceInfo *T, 1888 tok::ObjCKeywordKind MethodImplKind); 1889 1890 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1891 /// handle creating the ObjcPropertyDecl for a category or @interface. 1892 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1893 ObjCContainerDecl *CDecl, 1894 SourceLocation AtLoc, 1895 FieldDeclarator &FD, 1896 Selector GetterSel, 1897 Selector SetterSel, 1898 const bool isAssign, 1899 const bool isReadWrite, 1900 const unsigned Attributes, 1901 TypeSourceInfo *T, 1902 tok::ObjCKeywordKind MethodImplKind, 1903 DeclContext *lexicalDC = 0); 1904 1905 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1906 /// warning) when atomic property has one but not the other user-declared 1907 /// setter or getter. 1908 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1909 ObjCContainerDecl* IDecl); 1910 1911 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 1912 1913 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1914 1915 enum MethodMatchStrategy { 1916 MMS_loose, 1917 MMS_strict 1918 }; 1919 1920 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1921 /// true, or false, accordingly. 1922 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1923 const ObjCMethodDecl *PrevMethod, 1924 MethodMatchStrategy strategy = MMS_strict); 1925 1926 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1927 /// or protocol against those declared in their implementations. 1928 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1929 const SelectorSet &ClsMap, 1930 SelectorSet &InsMapSeen, 1931 SelectorSet &ClsMapSeen, 1932 ObjCImplDecl* IMPDecl, 1933 ObjCContainerDecl* IDecl, 1934 bool &IncompleteImpl, 1935 bool ImmediateClass, 1936 bool WarnExactMatch=false); 1937 1938 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in 1939 /// category matches with those implemented in its primary class and 1940 /// warns each time an exact match is found. 1941 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP); 1942 1943private: 1944 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1945 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1946 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1947 1948 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1949 /// optionally warns if there are multiple signatures. 1950 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1951 bool receiverIdOrClass, 1952 bool warn, bool instance); 1953 1954public: 1955 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1956 /// unit are added to a global pool. This allows us to efficiently associate 1957 /// a selector with a method declaraation for purposes of typechecking 1958 /// messages sent to "id" (where the class of the object is unknown). 1959 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1960 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1961 } 1962 1963 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1964 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1965 AddMethodToGlobalPool(Method, impl, /*instance*/false); 1966 } 1967 1968 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global 1969 /// pool. 1970 void AddAnyMethodToGlobalPool(Decl *D); 1971 1972 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 1973 /// there are multiple signatures. 1974 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 1975 bool receiverIdOrClass=false, 1976 bool warn=true) { 1977 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1978 warn, /*instance*/true); 1979 } 1980 1981 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 1982 /// there are multiple signatures. 1983 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 1984 bool receiverIdOrClass=false, 1985 bool warn=true) { 1986 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1987 warn, /*instance*/false); 1988 } 1989 1990 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 1991 /// implementation. 1992 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 1993 1994 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 1995 /// initialization. 1996 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 1997 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 1998 1999 //===--------------------------------------------------------------------===// 2000 // Statement Parsing Callbacks: SemaStmt.cpp. 2001public: 2002 class FullExprArg { 2003 public: 2004 FullExprArg(Sema &actions) : E(0) { } 2005 2006 // FIXME: The const_cast here is ugly. RValue references would make this 2007 // much nicer (or we could duplicate a bunch of the move semantics 2008 // emulation code from Ownership.h). 2009 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 2010 2011 ExprResult release() { 2012 return move(E); 2013 } 2014 2015 Expr *get() const { return E; } 2016 2017 Expr *operator->() { 2018 return E; 2019 } 2020 2021 private: 2022 // FIXME: No need to make the entire Sema class a friend when it's just 2023 // Sema::MakeFullExpr that needs access to the constructor below. 2024 friend class Sema; 2025 2026 explicit FullExprArg(Expr *expr) : E(expr) {} 2027 2028 Expr *E; 2029 }; 2030 2031 FullExprArg MakeFullExpr(Expr *Arg) { 2032 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 2033 } 2034 2035 StmtResult ActOnExprStmt(FullExprArg Expr); 2036 2037 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 2038 bool HasLeadingEmptyMacro = false); 2039 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 2040 MultiStmtArg Elts, 2041 bool isStmtExpr); 2042 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2043 SourceLocation StartLoc, 2044 SourceLocation EndLoc); 2045 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2046 StmtResult ActOnForEachLValueExpr(Expr *E); 2047 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2048 SourceLocation DotDotDotLoc, Expr *RHSVal, 2049 SourceLocation ColonLoc); 2050 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2051 2052 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2053 SourceLocation ColonLoc, 2054 Stmt *SubStmt, Scope *CurScope); 2055 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2056 SourceLocation ColonLoc, Stmt *SubStmt); 2057 2058 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2059 FullExprArg CondVal, Decl *CondVar, 2060 Stmt *ThenVal, 2061 SourceLocation ElseLoc, Stmt *ElseVal); 2062 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2063 Expr *Cond, 2064 Decl *CondVar); 2065 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2066 Stmt *Switch, Stmt *Body); 2067 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2068 FullExprArg Cond, 2069 Decl *CondVar, Stmt *Body); 2070 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2071 SourceLocation WhileLoc, 2072 SourceLocation CondLParen, Expr *Cond, 2073 SourceLocation CondRParen); 2074 2075 StmtResult ActOnForStmt(SourceLocation ForLoc, 2076 SourceLocation LParenLoc, 2077 Stmt *First, FullExprArg Second, 2078 Decl *SecondVar, 2079 FullExprArg Third, 2080 SourceLocation RParenLoc, 2081 Stmt *Body); 2082 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc, 2083 Expr *collection); 2084 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2085 SourceLocation LParenLoc, 2086 Stmt *First, Expr *Second, 2087 SourceLocation RParenLoc, Stmt *Body); 2088 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2089 SourceLocation LParenLoc, Stmt *LoopVar, 2090 SourceLocation ColonLoc, Expr *Collection, 2091 SourceLocation RParenLoc); 2092 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2093 SourceLocation ColonLoc, 2094 Stmt *RangeDecl, Stmt *BeginEndDecl, 2095 Expr *Cond, Expr *Inc, 2096 Stmt *LoopVarDecl, 2097 SourceLocation RParenLoc); 2098 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2099 2100 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2101 SourceLocation LabelLoc, 2102 LabelDecl *TheDecl); 2103 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2104 SourceLocation StarLoc, 2105 Expr *DestExp); 2106 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2107 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2108 2109 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2110 bool AllowFunctionParameters); 2111 2112 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2113 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2114 2115 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2116 bool IsSimple, bool IsVolatile, 2117 unsigned NumOutputs, unsigned NumInputs, 2118 IdentifierInfo **Names, 2119 MultiExprArg Constraints, 2120 MultiExprArg Exprs, 2121 Expr *AsmString, 2122 MultiExprArg Clobbers, 2123 SourceLocation RParenLoc, 2124 bool MSAsm = false); 2125 2126 2127 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2128 SourceLocation StartLoc, 2129 SourceLocation IdLoc, IdentifierInfo *Id, 2130 bool Invalid = false); 2131 2132 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2133 2134 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2135 Decl *Parm, Stmt *Body); 2136 2137 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2138 2139 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2140 MultiStmtArg Catch, Stmt *Finally); 2141 2142 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2143 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2144 Scope *CurScope); 2145 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, 2146 Expr *operand); 2147 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2148 Expr *SynchExpr, 2149 Stmt *SynchBody); 2150 2151 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2152 2153 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2154 SourceLocation StartLoc, 2155 SourceLocation IdLoc, 2156 IdentifierInfo *Id); 2157 2158 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2159 2160 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2161 Decl *ExDecl, Stmt *HandlerBlock); 2162 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2163 MultiStmtArg Handlers); 2164 2165 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2166 SourceLocation TryLoc, 2167 Stmt *TryBlock, 2168 Stmt *Handler); 2169 2170 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2171 Expr *FilterExpr, 2172 Stmt *Block); 2173 2174 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2175 Stmt *Block); 2176 2177 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2178 2179 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2180 2181 /// \brief If it's a file scoped decl that must warn if not used, keep track 2182 /// of it. 2183 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2184 2185 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2186 /// whose result is unused, warn. 2187 void DiagnoseUnusedExprResult(const Stmt *S); 2188 void DiagnoseUnusedDecl(const NamedDecl *ND); 2189 2190 ParsingDeclState PushParsingDeclaration() { 2191 return DelayedDiagnostics.pushParsingDecl(); 2192 } 2193 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2194 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2195 } 2196 2197 typedef ProcessingContextState ParsingClassState; 2198 ParsingClassState PushParsingClass() { 2199 return DelayedDiagnostics.pushContext(); 2200 } 2201 void PopParsingClass(ParsingClassState state) { 2202 DelayedDiagnostics.popContext(state); 2203 } 2204 2205 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2206 SourceLocation Loc, 2207 const ObjCInterfaceDecl *UnknownObjCClass=0); 2208 2209 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2210 2211 bool makeUnavailableInSystemHeader(SourceLocation loc, 2212 StringRef message); 2213 2214 //===--------------------------------------------------------------------===// 2215 // Expression Parsing Callbacks: SemaExpr.cpp. 2216 2217 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2218 const ObjCInterfaceDecl *UnknownObjCClass=0); 2219 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2220 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2221 ObjCMethodDecl *Getter, 2222 SourceLocation Loc); 2223 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2224 Expr **Args, unsigned NumArgs); 2225 2226 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 2227 2228 void PopExpressionEvaluationContext(); 2229 2230 void DiscardCleanupsInEvaluationContext(); 2231 2232 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 2233 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2234 void MarkDeclarationsReferencedInExpr(Expr *E); 2235 2236 /// \brief Figure out if an expression could be turned into a call. 2237 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2238 UnresolvedSetImpl &NonTemplateOverloads); 2239 /// \brief Give notes for a set of overloads. 2240 void NoteOverloads(const UnresolvedSetImpl &Overloads, 2241 const SourceLocation FinalNoteLoc); 2242 2243 /// \brief Conditionally issue a diagnostic based on the current 2244 /// evaluation context. 2245 /// 2246 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2247 /// the function body is parsed, and then do a basic reachability analysis to 2248 /// determine if the statement is reachable. If it is unreachable, the 2249 /// diagnostic will not be emitted. 2250 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement, 2251 const PartialDiagnostic &PD); 2252 2253 // Primary Expressions. 2254 SourceRange getExprRange(Expr *E) const; 2255 2256 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Id, 2257 bool HasTrailingLParen, bool IsAddressOfOperand); 2258 2259 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2260 TemplateArgumentListInfo &Buffer, 2261 DeclarationNameInfo &NameInfo, 2262 const TemplateArgumentListInfo *&TemplateArgs); 2263 2264 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2265 CorrectTypoContext CTC = CTC_Unknown, 2266 TemplateArgumentListInfo *ExplicitTemplateArgs = 0, 2267 Expr **Args = 0, unsigned NumArgs = 0); 2268 2269 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S, 2270 IdentifierInfo *II, 2271 bool AllowBuiltinCreation=false); 2272 2273 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2274 const DeclarationNameInfo &NameInfo, 2275 bool isAddressOfOperand, 2276 const TemplateArgumentListInfo *TemplateArgs); 2277 2278 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2279 ExprValueKind VK, 2280 SourceLocation Loc, 2281 const CXXScopeSpec *SS = 0); 2282 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2283 ExprValueKind VK, 2284 const DeclarationNameInfo &NameInfo, 2285 const CXXScopeSpec *SS = 0); 2286 ExprResult 2287 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2288 SourceLocation nameLoc, 2289 IndirectFieldDecl *indirectField, 2290 Expr *baseObjectExpr = 0, 2291 SourceLocation opLoc = SourceLocation()); 2292 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2293 LookupResult &R, 2294 const TemplateArgumentListInfo *TemplateArgs); 2295 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2296 LookupResult &R, 2297 const TemplateArgumentListInfo *TemplateArgs, 2298 bool IsDefiniteInstance); 2299 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2300 const LookupResult &R, 2301 bool HasTrailingLParen); 2302 2303 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2304 const DeclarationNameInfo &NameInfo); 2305 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2306 const DeclarationNameInfo &NameInfo, 2307 const TemplateArgumentListInfo *TemplateArgs); 2308 2309 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2310 LookupResult &R, 2311 bool NeedsADL); 2312 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2313 const DeclarationNameInfo &NameInfo, 2314 NamedDecl *D); 2315 2316 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2317 ExprResult ActOnNumericConstant(const Token &Tok); 2318 ExprResult ActOnCharacterConstant(const Token &Tok); 2319 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E); 2320 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2321 SourceLocation R, 2322 MultiExprArg Val); 2323 2324 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2325 /// fragments (e.g. "foo" "bar" L"baz"). 2326 ExprResult ActOnStringLiteral(const Token *StringToks, 2327 unsigned NumStringToks); 2328 2329 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2330 SourceLocation DefaultLoc, 2331 SourceLocation RParenLoc, 2332 Expr *ControllingExpr, 2333 MultiTypeArg ArgTypes, 2334 MultiExprArg ArgExprs); 2335 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2336 SourceLocation DefaultLoc, 2337 SourceLocation RParenLoc, 2338 Expr *ControllingExpr, 2339 TypeSourceInfo **Types, 2340 Expr **Exprs, 2341 unsigned NumAssocs); 2342 2343 // Binary/Unary Operators. 'Tok' is the token for the operator. 2344 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2345 Expr *InputExpr); 2346 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2347 UnaryOperatorKind Opc, Expr *Input); 2348 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2349 tok::TokenKind Op, Expr *Input); 2350 2351 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo, 2352 SourceLocation OpLoc, 2353 UnaryExprOrTypeTrait ExprKind, 2354 SourceRange R); 2355 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2356 UnaryExprOrTypeTrait ExprKind); 2357 ExprResult 2358 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2359 UnaryExprOrTypeTrait ExprKind, 2360 bool IsType, void *TyOrEx, 2361 const SourceRange &ArgRange); 2362 2363 ExprResult CheckPlaceholderExpr(Expr *E); 2364 bool CheckVecStepExpr(Expr *E); 2365 2366 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2367 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc, 2368 SourceRange ExprRange, 2369 UnaryExprOrTypeTrait ExprKind); 2370 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2371 SourceLocation OpLoc, 2372 IdentifierInfo &Name, 2373 SourceLocation NameLoc, 2374 SourceLocation RParenLoc); 2375 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2376 tok::TokenKind Kind, Expr *Input); 2377 2378 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2379 Expr *Idx, SourceLocation RLoc); 2380 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2381 Expr *Idx, SourceLocation RLoc); 2382 2383 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2384 SourceLocation OpLoc, bool IsArrow, 2385 CXXScopeSpec &SS, 2386 NamedDecl *FirstQualifierInScope, 2387 const DeclarationNameInfo &NameInfo, 2388 const TemplateArgumentListInfo *TemplateArgs); 2389 2390 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2391 SourceLocation OpLoc, bool IsArrow, 2392 const CXXScopeSpec &SS, 2393 NamedDecl *FirstQualifierInScope, 2394 LookupResult &R, 2395 const TemplateArgumentListInfo *TemplateArgs, 2396 bool SuppressQualifierCheck = false); 2397 2398 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2399 bool &IsArrow, SourceLocation OpLoc, 2400 CXXScopeSpec &SS, 2401 Decl *ObjCImpDecl, 2402 bool HasTemplateArgs); 2403 2404 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2405 const CXXScopeSpec &SS, 2406 const LookupResult &R); 2407 2408 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2409 bool IsArrow, SourceLocation OpLoc, 2410 const CXXScopeSpec &SS, 2411 NamedDecl *FirstQualifierInScope, 2412 const DeclarationNameInfo &NameInfo, 2413 const TemplateArgumentListInfo *TemplateArgs); 2414 2415 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2416 SourceLocation OpLoc, 2417 tok::TokenKind OpKind, 2418 CXXScopeSpec &SS, 2419 UnqualifiedId &Member, 2420 Decl *ObjCImpDecl, 2421 bool HasTrailingLParen); 2422 2423 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2424 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2425 FunctionDecl *FDecl, 2426 const FunctionProtoType *Proto, 2427 Expr **Args, unsigned NumArgs, 2428 SourceLocation RParenLoc); 2429 2430 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2431 /// This provides the location of the left/right parens and a list of comma 2432 /// locations. 2433 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2434 MultiExprArg ArgExprs, SourceLocation RParenLoc, 2435 Expr *ExecConfig = 0); 2436 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2437 SourceLocation LParenLoc, 2438 Expr **Args, unsigned NumArgs, 2439 SourceLocation RParenLoc, 2440 Expr *Config = 0); 2441 2442 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2443 MultiExprArg ExecConfig, 2444 SourceLocation GGGLoc); 2445 2446 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2447 Declarator &D, ParsedType &Ty, 2448 SourceLocation RParenLoc, Expr *CastExpr); 2449 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2450 TypeSourceInfo *Ty, 2451 SourceLocation RParenLoc, 2452 Expr *Op); 2453 2454 /// \brief Build an altivec or OpenCL literal. 2455 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2456 SourceLocation RParenLoc, Expr *E, 2457 TypeSourceInfo *TInfo); 2458 2459 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2460 2461 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2462 ParsedType Ty, 2463 SourceLocation RParenLoc, 2464 Expr *InitExpr); 2465 2466 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2467 TypeSourceInfo *TInfo, 2468 SourceLocation RParenLoc, 2469 Expr *LiteralExpr); 2470 2471 ExprResult ActOnInitList(SourceLocation LBraceLoc, 2472 MultiExprArg InitArgList, 2473 SourceLocation RBraceLoc); 2474 2475 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2476 SourceLocation Loc, 2477 bool GNUSyntax, 2478 ExprResult Init); 2479 2480 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2481 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr); 2482 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2483 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr); 2484 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc, 2485 Expr *LHSExpr, Expr *RHSExpr); 2486 2487 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2488 /// in the case of a the GNU conditional expr extension. 2489 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2490 SourceLocation ColonLoc, 2491 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr); 2492 2493 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2494 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2495 LabelDecl *TheDecl); 2496 2497 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2498 SourceLocation RPLoc); // "({..})" 2499 2500 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2501 struct OffsetOfComponent { 2502 SourceLocation LocStart, LocEnd; 2503 bool isBrackets; // true if [expr], false if .ident 2504 union { 2505 IdentifierInfo *IdentInfo; 2506 Expr *E; 2507 } U; 2508 }; 2509 2510 /// __builtin_offsetof(type, a.b[123][456].c) 2511 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2512 TypeSourceInfo *TInfo, 2513 OffsetOfComponent *CompPtr, 2514 unsigned NumComponents, 2515 SourceLocation RParenLoc); 2516 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2517 SourceLocation BuiltinLoc, 2518 SourceLocation TypeLoc, 2519 ParsedType ParsedArgTy, 2520 OffsetOfComponent *CompPtr, 2521 unsigned NumComponents, 2522 SourceLocation RParenLoc); 2523 2524 // __builtin_choose_expr(constExpr, expr1, expr2) 2525 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2526 Expr *CondExpr, Expr *LHSExpr, 2527 Expr *RHSExpr, SourceLocation RPLoc); 2528 2529 // __builtin_va_arg(expr, type) 2530 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, 2531 SourceLocation RPLoc); 2532 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E, 2533 TypeSourceInfo *TInfo, SourceLocation RPLoc); 2534 2535 // __null 2536 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2537 2538 bool CheckCaseExpression(Expr *E); 2539 2540 bool CheckMicrosoftIfExistsSymbol(CXXScopeSpec &SS, UnqualifiedId &Name); 2541 2542 //===------------------------- "Block" Extension ------------------------===// 2543 2544 /// ActOnBlockStart - This callback is invoked when a block literal is 2545 /// started. 2546 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2547 2548 /// ActOnBlockArguments - This callback allows processing of block arguments. 2549 /// If there are no arguments, this is still invoked. 2550 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2551 2552 /// ActOnBlockError - If there is an error parsing a block, this callback 2553 /// is invoked to pop the information about the block from the action impl. 2554 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2555 2556 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2557 /// literal was successfully completed. ^(int x){...} 2558 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body, 2559 Scope *CurScope); 2560 2561 //===---------------------------- OpenCL Features -----------------------===// 2562 2563 /// __builtin_astype(...) 2564 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, 2565 SourceLocation BuiltinLoc, 2566 SourceLocation RParenLoc); 2567 2568 //===---------------------------- C++ Features --------------------------===// 2569 2570 // Act on C++ namespaces 2571 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2572 SourceLocation NamespaceLoc, 2573 SourceLocation IdentLoc, 2574 IdentifierInfo *Ident, 2575 SourceLocation LBrace, 2576 AttributeList *AttrList); 2577 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2578 2579 NamespaceDecl *getStdNamespace() const; 2580 NamespaceDecl *getOrCreateStdNamespace(); 2581 2582 CXXRecordDecl *getStdBadAlloc() const; 2583 2584 Decl *ActOnUsingDirective(Scope *CurScope, 2585 SourceLocation UsingLoc, 2586 SourceLocation NamespcLoc, 2587 CXXScopeSpec &SS, 2588 SourceLocation IdentLoc, 2589 IdentifierInfo *NamespcName, 2590 AttributeList *AttrList); 2591 2592 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2593 2594 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2595 SourceLocation NamespaceLoc, 2596 SourceLocation AliasLoc, 2597 IdentifierInfo *Alias, 2598 CXXScopeSpec &SS, 2599 SourceLocation IdentLoc, 2600 IdentifierInfo *Ident); 2601 2602 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2603 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2604 const LookupResult &PreviousDecls); 2605 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2606 NamedDecl *Target); 2607 2608 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2609 bool isTypeName, 2610 const CXXScopeSpec &SS, 2611 SourceLocation NameLoc, 2612 const LookupResult &Previous); 2613 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2614 const CXXScopeSpec &SS, 2615 SourceLocation NameLoc); 2616 2617 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2618 SourceLocation UsingLoc, 2619 CXXScopeSpec &SS, 2620 const DeclarationNameInfo &NameInfo, 2621 AttributeList *AttrList, 2622 bool IsInstantiation, 2623 bool IsTypeName, 2624 SourceLocation TypenameLoc); 2625 2626 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2627 2628 Decl *ActOnUsingDeclaration(Scope *CurScope, 2629 AccessSpecifier AS, 2630 bool HasUsingKeyword, 2631 SourceLocation UsingLoc, 2632 CXXScopeSpec &SS, 2633 UnqualifiedId &Name, 2634 AttributeList *AttrList, 2635 bool IsTypeName, 2636 SourceLocation TypenameLoc); 2637 Decl *ActOnAliasDeclaration(Scope *CurScope, 2638 AccessSpecifier AS, 2639 MultiTemplateParamsArg TemplateParams, 2640 SourceLocation UsingLoc, 2641 UnqualifiedId &Name, 2642 TypeResult Type); 2643 2644 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2645 /// ActOnDeclarator, when a C++ direct initializer is present. 2646 /// e.g: "int x(1);" 2647 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2648 SourceLocation LParenLoc, 2649 MultiExprArg Exprs, 2650 SourceLocation RParenLoc, 2651 bool TypeMayContainAuto); 2652 2653 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2654 /// and sets it as the initializer for the the passed in VarDecl. 2655 bool InitializeVarWithConstructor(VarDecl *VD, 2656 CXXConstructorDecl *Constructor, 2657 MultiExprArg Exprs); 2658 2659 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2660 /// including handling of its default argument expressions. 2661 /// 2662 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2663 ExprResult 2664 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2665 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2666 bool RequiresZeroInit, unsigned ConstructKind, 2667 SourceRange ParenRange); 2668 2669 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2670 // the constructor can be elidable? 2671 ExprResult 2672 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2673 CXXConstructorDecl *Constructor, bool Elidable, 2674 MultiExprArg Exprs, bool RequiresZeroInit, 2675 unsigned ConstructKind, 2676 SourceRange ParenRange); 2677 2678 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2679 /// the default expr if needed. 2680 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2681 FunctionDecl *FD, 2682 ParmVarDecl *Param); 2683 2684 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2685 /// constructed variable. 2686 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2687 2688 /// \brief Helper class that collects exception specifications for 2689 /// implicitly-declared special member functions. 2690 class ImplicitExceptionSpecification { 2691 // Pointer to allow copying 2692 ASTContext *Context; 2693 // We order exception specifications thus: 2694 // noexcept is the most restrictive, but is only used in C++0x. 2695 // throw() comes next. 2696 // Then a throw(collected exceptions) 2697 // Finally no specification. 2698 // throw(...) is used instead if any called function uses it. 2699 // 2700 // If this exception specification cannot be known yet (for instance, 2701 // because this is the exception specification for a defaulted default 2702 // constructor and we haven't finished parsing the deferred parts of the 2703 // class yet), the C++0x standard does not specify how to behave. We 2704 // record this as an 'unknown' exception specification, which overrules 2705 // any other specification (even 'none', to keep this rule simple). 2706 ExceptionSpecificationType ComputedEST; 2707 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2708 SmallVector<QualType, 4> Exceptions; 2709 2710 void ClearExceptions() { 2711 ExceptionsSeen.clear(); 2712 Exceptions.clear(); 2713 } 2714 2715 public: 2716 explicit ImplicitExceptionSpecification(ASTContext &Context) 2717 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2718 if (!Context.getLangOptions().CPlusPlus0x) 2719 ComputedEST = EST_DynamicNone; 2720 } 2721 2722 /// \brief Get the computed exception specification type. 2723 ExceptionSpecificationType getExceptionSpecType() const { 2724 assert(ComputedEST != EST_ComputedNoexcept && 2725 "noexcept(expr) should not be a possible result"); 2726 return ComputedEST; 2727 } 2728 2729 /// \brief The number of exceptions in the exception specification. 2730 unsigned size() const { return Exceptions.size(); } 2731 2732 /// \brief The set of exceptions in the exception specification. 2733 const QualType *data() const { return Exceptions.data(); } 2734 2735 /// \brief Integrate another called method into the collected data. 2736 void CalledDecl(CXXMethodDecl *Method); 2737 2738 /// \brief Integrate an invoked expression into the collected data. 2739 void CalledExpr(Expr *E); 2740 2741 /// \brief Specify that the exception specification can't be detemined yet. 2742 void SetDelayed() { 2743 ClearExceptions(); 2744 ComputedEST = EST_Delayed; 2745 } 2746 2747 FunctionProtoType::ExtProtoInfo getEPI() const { 2748 FunctionProtoType::ExtProtoInfo EPI; 2749 EPI.ExceptionSpecType = getExceptionSpecType(); 2750 EPI.NumExceptions = size(); 2751 EPI.Exceptions = data(); 2752 return EPI; 2753 } 2754 }; 2755 2756 /// \brief Determine what sort of exception specification a defaulted 2757 /// copy constructor of a class will have. 2758 ImplicitExceptionSpecification 2759 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2760 2761 /// \brief Determine what sort of exception specification a defaulted 2762 /// default constructor of a class will have, and whether the parameter 2763 /// will be const. 2764 std::pair<ImplicitExceptionSpecification, bool> 2765 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2766 2767 /// \brief Determine what sort of exception specification a defautled 2768 /// copy assignment operator of a class will have, and whether the 2769 /// parameter will be const. 2770 std::pair<ImplicitExceptionSpecification, bool> 2771 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2772 2773 /// \brief Determine what sort of exception specification a defaulted move 2774 /// constructor of a class will have. 2775 ImplicitExceptionSpecification 2776 ComputeDefaultedMoveCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2777 2778 /// \brief Determine what sort of exception specification a defaulted move 2779 /// assignment operator of a class will have. 2780 ImplicitExceptionSpecification 2781 ComputeDefaultedMoveAssignmentExceptionSpec(CXXRecordDecl *ClassDecl); 2782 2783 /// \brief Determine what sort of exception specification a defaulted 2784 /// destructor of a class will have. 2785 ImplicitExceptionSpecification 2786 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 2787 2788 /// \brief Determine if a defaulted default constructor ought to be 2789 /// deleted. 2790 bool ShouldDeleteDefaultConstructor(CXXConstructorDecl *CD); 2791 2792 /// \brief Determine if a defaulted copy constructor ought to be 2793 /// deleted. 2794 bool ShouldDeleteCopyConstructor(CXXConstructorDecl *CD); 2795 2796 /// \brief Determine if a defaulted copy assignment operator ought to be 2797 /// deleted. 2798 bool ShouldDeleteCopyAssignmentOperator(CXXMethodDecl *MD); 2799 2800 /// \brief Determine if a defaulted move constructor ought to be deleted. 2801 bool ShouldDeleteMoveConstructor(CXXConstructorDecl *CD); 2802 2803 /// \brief Determine if a defaulted move assignment operator ought to be 2804 /// deleted. 2805 bool ShouldDeleteMoveAssignmentOperator(CXXMethodDecl *MD); 2806 2807 /// \brief Determine if a defaulted destructor ought to be deleted. 2808 bool ShouldDeleteDestructor(CXXDestructorDecl *DD); 2809 2810 /// \brief Declare the implicit default constructor for the given class. 2811 /// 2812 /// \param ClassDecl The class declaration into which the implicit 2813 /// default constructor will be added. 2814 /// 2815 /// \returns The implicitly-declared default constructor. 2816 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2817 CXXRecordDecl *ClassDecl); 2818 2819 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2820 /// defining this constructor as the default constructor. 2821 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2822 CXXConstructorDecl *Constructor); 2823 2824 /// \brief Declare the implicit destructor for the given class. 2825 /// 2826 /// \param ClassDecl The class declaration into which the implicit 2827 /// destructor will be added. 2828 /// 2829 /// \returns The implicitly-declared destructor. 2830 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2831 2832 /// DefineImplicitDestructor - Checks for feasibility of 2833 /// defining this destructor as the default destructor. 2834 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2835 CXXDestructorDecl *Destructor); 2836 2837 /// \brief Build an exception spec for destructors that don't have one. 2838 /// 2839 /// C++11 says that user-defined destructors with no exception spec get one 2840 /// that looks as if the destructor was implicitly declared. 2841 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 2842 CXXDestructorDecl *Destructor); 2843 2844 /// \brief Declare all inherited constructors for the given class. 2845 /// 2846 /// \param ClassDecl The class declaration into which the inherited 2847 /// constructors will be added. 2848 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2849 2850 /// \brief Declare the implicit copy constructor for the given class. 2851 /// 2852 /// \param ClassDecl The class declaration into which the implicit 2853 /// copy constructor will be added. 2854 /// 2855 /// \returns The implicitly-declared copy constructor. 2856 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2857 2858 /// DefineImplicitCopyConstructor - Checks for feasibility of 2859 /// defining this constructor as the copy constructor. 2860 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2861 CXXConstructorDecl *Constructor); 2862 2863 /// \brief Declare the implicit move constructor for the given class. 2864 /// 2865 /// \param ClassDecl The Class declaration into which the implicit 2866 /// move constructor will be added. 2867 /// 2868 /// \returns The implicitly-declared move constructor, or NULL if it wasn't 2869 /// declared. 2870 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl); 2871 2872 /// DefineImplicitMoveConstructor - Checks for feasibility of 2873 /// defining this constructor as the move constructor. 2874 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation, 2875 CXXConstructorDecl *Constructor); 2876 2877 /// \brief Declare the implicit copy assignment operator for the given class. 2878 /// 2879 /// \param ClassDecl The class declaration into which the implicit 2880 /// copy assignment operator will be added. 2881 /// 2882 /// \returns The implicitly-declared copy assignment operator. 2883 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2884 2885 /// \brief Defines an implicitly-declared copy assignment operator. 2886 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2887 CXXMethodDecl *MethodDecl); 2888 2889 /// \brief Declare the implicit move assignment operator for the given class. 2890 /// 2891 /// \param ClassDecl The Class declaration into which the implicit 2892 /// move assignment operator will be added. 2893 /// 2894 /// \returns The implicitly-declared move assignment operator, or NULL if it 2895 /// wasn't declared. 2896 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl); 2897 2898 /// \brief Defines an implicitly-declared move assignment operator. 2899 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation, 2900 CXXMethodDecl *MethodDecl); 2901 2902 /// \brief Force the declaration of any implicitly-declared members of this 2903 /// class. 2904 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2905 2906 /// MaybeBindToTemporary - If the passed in expression has a record type with 2907 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 2908 /// it simply returns the passed in expression. 2909 ExprResult MaybeBindToTemporary(Expr *E); 2910 2911 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 2912 MultiExprArg ArgsPtr, 2913 SourceLocation Loc, 2914 ASTOwningVector<Expr*> &ConvertedArgs); 2915 2916 ParsedType getDestructorName(SourceLocation TildeLoc, 2917 IdentifierInfo &II, SourceLocation NameLoc, 2918 Scope *S, CXXScopeSpec &SS, 2919 ParsedType ObjectType, 2920 bool EnteringContext); 2921 2922 // Checks that reinterpret casts don't have undefined behavior. 2923 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 2924 bool IsDereference, SourceRange Range); 2925 2926 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 2927 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 2928 tok::TokenKind Kind, 2929 SourceLocation LAngleBracketLoc, 2930 Declarator &D, 2931 SourceLocation RAngleBracketLoc, 2932 SourceLocation LParenLoc, 2933 Expr *E, 2934 SourceLocation RParenLoc); 2935 2936 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 2937 tok::TokenKind Kind, 2938 TypeSourceInfo *Ty, 2939 Expr *E, 2940 SourceRange AngleBrackets, 2941 SourceRange Parens); 2942 2943 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2944 SourceLocation TypeidLoc, 2945 TypeSourceInfo *Operand, 2946 SourceLocation RParenLoc); 2947 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2948 SourceLocation TypeidLoc, 2949 Expr *Operand, 2950 SourceLocation RParenLoc); 2951 2952 /// ActOnCXXTypeid - Parse typeid( something ). 2953 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 2954 SourceLocation LParenLoc, bool isType, 2955 void *TyOrExpr, 2956 SourceLocation RParenLoc); 2957 2958 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2959 SourceLocation TypeidLoc, 2960 TypeSourceInfo *Operand, 2961 SourceLocation RParenLoc); 2962 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2963 SourceLocation TypeidLoc, 2964 Expr *Operand, 2965 SourceLocation RParenLoc); 2966 2967 /// ActOnCXXUuidof - Parse __uuidof( something ). 2968 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 2969 SourceLocation LParenLoc, bool isType, 2970 void *TyOrExpr, 2971 SourceLocation RParenLoc); 2972 2973 2974 //// ActOnCXXThis - Parse 'this' pointer. 2975 ExprResult ActOnCXXThis(SourceLocation loc); 2976 2977 /// getAndCaptureCurrentThisType - Try to capture a 'this' pointer. Returns 2978 /// the type of the 'this' pointer, or a null type if this is not possible. 2979 QualType getAndCaptureCurrentThisType(); 2980 2981 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 2982 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 2983 2984 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 2985 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 2986 2987 //// ActOnCXXThrow - Parse throw expressions. 2988 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 2989 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 2990 bool IsThrownVarInScope); 2991 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 2992 bool IsThrownVarInScope); 2993 2994 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 2995 /// Can be interpreted either as function-style casting ("int(x)") 2996 /// or class type construction ("ClassType(x,y,z)") 2997 /// or creation of a value-initialized type ("int()"). 2998 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 2999 SourceLocation LParenLoc, 3000 MultiExprArg Exprs, 3001 SourceLocation RParenLoc); 3002 3003 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 3004 SourceLocation LParenLoc, 3005 MultiExprArg Exprs, 3006 SourceLocation RParenLoc); 3007 3008 /// ActOnCXXNew - Parsed a C++ 'new' expression. 3009 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 3010 SourceLocation PlacementLParen, 3011 MultiExprArg PlacementArgs, 3012 SourceLocation PlacementRParen, 3013 SourceRange TypeIdParens, Declarator &D, 3014 SourceLocation ConstructorLParen, 3015 MultiExprArg ConstructorArgs, 3016 SourceLocation ConstructorRParen); 3017 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 3018 SourceLocation PlacementLParen, 3019 MultiExprArg PlacementArgs, 3020 SourceLocation PlacementRParen, 3021 SourceRange TypeIdParens, 3022 QualType AllocType, 3023 TypeSourceInfo *AllocTypeInfo, 3024 Expr *ArraySize, 3025 SourceLocation ConstructorLParen, 3026 MultiExprArg ConstructorArgs, 3027 SourceLocation ConstructorRParen, 3028 bool TypeMayContainAuto = true); 3029 3030 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 3031 SourceRange R); 3032 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 3033 bool UseGlobal, QualType AllocType, bool IsArray, 3034 Expr **PlaceArgs, unsigned NumPlaceArgs, 3035 FunctionDecl *&OperatorNew, 3036 FunctionDecl *&OperatorDelete); 3037 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 3038 DeclarationName Name, Expr** Args, 3039 unsigned NumArgs, DeclContext *Ctx, 3040 bool AllowMissing, FunctionDecl *&Operator, 3041 bool Diagnose = true); 3042 void DeclareGlobalNewDelete(); 3043 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 3044 QualType Argument, 3045 bool addMallocAttr = false); 3046 3047 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 3048 DeclarationName Name, FunctionDecl* &Operator, 3049 bool Diagnose = true); 3050 3051 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 3052 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 3053 bool UseGlobal, bool ArrayForm, 3054 Expr *Operand); 3055 3056 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 3057 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 3058 SourceLocation StmtLoc, 3059 bool ConvertToBoolean); 3060 3061 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 3062 Expr *Operand, SourceLocation RParen); 3063 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 3064 SourceLocation RParen); 3065 3066 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 3067 /// pseudo-functions. 3068 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 3069 SourceLocation KWLoc, 3070 ParsedType Ty, 3071 SourceLocation RParen); 3072 3073 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3074 SourceLocation KWLoc, 3075 TypeSourceInfo *T, 3076 SourceLocation RParen); 3077 3078 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3079 /// pseudo-functions. 3080 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3081 SourceLocation KWLoc, 3082 ParsedType LhsTy, 3083 ParsedType RhsTy, 3084 SourceLocation RParen); 3085 3086 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3087 SourceLocation KWLoc, 3088 TypeSourceInfo *LhsT, 3089 TypeSourceInfo *RhsT, 3090 SourceLocation RParen); 3091 3092 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3093 /// pseudo-functions. 3094 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3095 SourceLocation KWLoc, 3096 ParsedType LhsTy, 3097 Expr *DimExpr, 3098 SourceLocation RParen); 3099 3100 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3101 SourceLocation KWLoc, 3102 TypeSourceInfo *TSInfo, 3103 Expr *DimExpr, 3104 SourceLocation RParen); 3105 3106 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3107 /// pseudo-functions. 3108 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3109 SourceLocation KWLoc, 3110 Expr *Queried, 3111 SourceLocation RParen); 3112 3113 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3114 SourceLocation KWLoc, 3115 Expr *Queried, 3116 SourceLocation RParen); 3117 3118 ExprResult ActOnStartCXXMemberReference(Scope *S, 3119 Expr *Base, 3120 SourceLocation OpLoc, 3121 tok::TokenKind OpKind, 3122 ParsedType &ObjectType, 3123 bool &MayBePseudoDestructor); 3124 3125 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3126 3127 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3128 SourceLocation OpLoc, 3129 tok::TokenKind OpKind, 3130 const CXXScopeSpec &SS, 3131 TypeSourceInfo *ScopeType, 3132 SourceLocation CCLoc, 3133 SourceLocation TildeLoc, 3134 PseudoDestructorTypeStorage DestroyedType, 3135 bool HasTrailingLParen); 3136 3137 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3138 SourceLocation OpLoc, 3139 tok::TokenKind OpKind, 3140 CXXScopeSpec &SS, 3141 UnqualifiedId &FirstTypeName, 3142 SourceLocation CCLoc, 3143 SourceLocation TildeLoc, 3144 UnqualifiedId &SecondTypeName, 3145 bool HasTrailingLParen); 3146 3147 /// MaybeCreateExprWithCleanups - If the current full-expression 3148 /// requires any cleanups, surround it with a ExprWithCleanups node. 3149 /// Otherwise, just returns the passed-in expression. 3150 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3151 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3152 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3153 3154 ExprResult ActOnFinishFullExpr(Expr *Expr); 3155 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3156 3157 // Marks SS invalid if it represents an incomplete type. 3158 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3159 3160 DeclContext *computeDeclContext(QualType T); 3161 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3162 bool EnteringContext = false); 3163 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3164 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3165 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3166 3167 /// \brief The parser has parsed a global nested-name-specifier '::'. 3168 /// 3169 /// \param S The scope in which this nested-name-specifier occurs. 3170 /// 3171 /// \param CCLoc The location of the '::'. 3172 /// 3173 /// \param SS The nested-name-specifier, which will be updated in-place 3174 /// to reflect the parsed nested-name-specifier. 3175 /// 3176 /// \returns true if an error occurred, false otherwise. 3177 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3178 CXXScopeSpec &SS); 3179 3180 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3181 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3182 3183 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3184 SourceLocation IdLoc, 3185 IdentifierInfo &II, 3186 ParsedType ObjectType); 3187 3188 bool BuildCXXNestedNameSpecifier(Scope *S, 3189 IdentifierInfo &Identifier, 3190 SourceLocation IdentifierLoc, 3191 SourceLocation CCLoc, 3192 QualType ObjectType, 3193 bool EnteringContext, 3194 CXXScopeSpec &SS, 3195 NamedDecl *ScopeLookupResult, 3196 bool ErrorRecoveryLookup); 3197 3198 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3199 /// 3200 /// \param S The scope in which this nested-name-specifier occurs. 3201 /// 3202 /// \param Identifier The identifier preceding the '::'. 3203 /// 3204 /// \param IdentifierLoc The location of the identifier. 3205 /// 3206 /// \param CCLoc The location of the '::'. 3207 /// 3208 /// \param ObjectType The type of the object, if we're parsing 3209 /// nested-name-specifier in a member access expression. 3210 /// 3211 /// \param EnteringContext Whether we're entering the context nominated by 3212 /// this nested-name-specifier. 3213 /// 3214 /// \param SS The nested-name-specifier, which is both an input 3215 /// parameter (the nested-name-specifier before this type) and an 3216 /// output parameter (containing the full nested-name-specifier, 3217 /// including this new type). 3218 /// 3219 /// \returns true if an error occurred, false otherwise. 3220 bool ActOnCXXNestedNameSpecifier(Scope *S, 3221 IdentifierInfo &Identifier, 3222 SourceLocation IdentifierLoc, 3223 SourceLocation CCLoc, 3224 ParsedType ObjectType, 3225 bool EnteringContext, 3226 CXXScopeSpec &SS); 3227 3228 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3229 IdentifierInfo &Identifier, 3230 SourceLocation IdentifierLoc, 3231 SourceLocation ColonLoc, 3232 ParsedType ObjectType, 3233 bool EnteringContext); 3234 3235 /// \brief The parser has parsed a nested-name-specifier 3236 /// 'template[opt] template-name < template-args >::'. 3237 /// 3238 /// \param S The scope in which this nested-name-specifier occurs. 3239 /// 3240 /// \param TemplateLoc The location of the 'template' keyword, if any. 3241 /// 3242 /// \param SS The nested-name-specifier, which is both an input 3243 /// parameter (the nested-name-specifier before this type) and an 3244 /// output parameter (containing the full nested-name-specifier, 3245 /// including this new type). 3246 /// 3247 /// \param TemplateLoc the location of the 'template' keyword, if any. 3248 /// \param TemplateName The template name. 3249 /// \param TemplateNameLoc The location of the template name. 3250 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3251 /// \param TemplateArgs The template arguments. 3252 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3253 /// \param CCLoc The location of the '::'. 3254 3255 /// \param EnteringContext Whether we're entering the context of the 3256 /// nested-name-specifier. 3257 /// 3258 /// 3259 /// \returns true if an error occurred, false otherwise. 3260 bool ActOnCXXNestedNameSpecifier(Scope *S, 3261 SourceLocation TemplateLoc, 3262 CXXScopeSpec &SS, 3263 TemplateTy Template, 3264 SourceLocation TemplateNameLoc, 3265 SourceLocation LAngleLoc, 3266 ASTTemplateArgsPtr TemplateArgs, 3267 SourceLocation RAngleLoc, 3268 SourceLocation CCLoc, 3269 bool EnteringContext); 3270 3271 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3272 /// that the parser can use later to reconstruct the given 3273 /// nested-name-specifier. 3274 /// 3275 /// \param SS A nested-name-specifier. 3276 /// 3277 /// \returns A pointer containing all of the information in the 3278 /// nested-name-specifier \p SS. 3279 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3280 3281 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3282 /// the nested-name-specifier structure. 3283 /// 3284 /// \param Annotation The annotation pointer, produced by 3285 /// \c SaveNestedNameSpecifierAnnotation(). 3286 /// 3287 /// \param AnnotationRange The source range corresponding to the annotation. 3288 /// 3289 /// \param SS The nested-name-specifier that will be updated with the contents 3290 /// of the annotation pointer. 3291 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3292 SourceRange AnnotationRange, 3293 CXXScopeSpec &SS); 3294 3295 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3296 3297 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3298 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3299 /// After this method is called, according to [C++ 3.4.3p3], names should be 3300 /// looked up in the declarator-id's scope, until the declarator is parsed and 3301 /// ActOnCXXExitDeclaratorScope is called. 3302 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3303 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3304 3305 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3306 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3307 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3308 /// Used to indicate that names should revert to being looked up in the 3309 /// defining scope. 3310 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3311 3312 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3313 /// initializer for the declaration 'Dcl'. 3314 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3315 /// static data member of class X, names should be looked up in the scope of 3316 /// class X. 3317 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3318 3319 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3320 /// initializer for the declaration 'Dcl'. 3321 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3322 3323 // ParseObjCStringLiteral - Parse Objective-C string literals. 3324 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3325 Expr **Strings, 3326 unsigned NumStrings); 3327 3328 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3329 TypeSourceInfo *EncodedTypeInfo, 3330 SourceLocation RParenLoc); 3331 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3332 CXXMethodDecl *Method); 3333 3334 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3335 SourceLocation EncodeLoc, 3336 SourceLocation LParenLoc, 3337 ParsedType Ty, 3338 SourceLocation RParenLoc); 3339 3340 // ParseObjCSelectorExpression - Build selector expression for @selector 3341 ExprResult ParseObjCSelectorExpression(Selector Sel, 3342 SourceLocation AtLoc, 3343 SourceLocation SelLoc, 3344 SourceLocation LParenLoc, 3345 SourceLocation RParenLoc); 3346 3347 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3348 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3349 SourceLocation AtLoc, 3350 SourceLocation ProtoLoc, 3351 SourceLocation LParenLoc, 3352 SourceLocation RParenLoc); 3353 3354 //===--------------------------------------------------------------------===// 3355 // C++ Declarations 3356 // 3357 Decl *ActOnStartLinkageSpecification(Scope *S, 3358 SourceLocation ExternLoc, 3359 SourceLocation LangLoc, 3360 StringRef Lang, 3361 SourceLocation LBraceLoc); 3362 Decl *ActOnFinishLinkageSpecification(Scope *S, 3363 Decl *LinkageSpec, 3364 SourceLocation RBraceLoc); 3365 3366 3367 //===--------------------------------------------------------------------===// 3368 // C++ Classes 3369 // 3370 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3371 const CXXScopeSpec *SS = 0); 3372 3373 Decl *ActOnAccessSpecifier(AccessSpecifier Access, 3374 SourceLocation ASLoc, 3375 SourceLocation ColonLoc); 3376 3377 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3378 Declarator &D, 3379 MultiTemplateParamsArg TemplateParameterLists, 3380 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3381 Expr *Init, bool HasDeferredInit, 3382 bool IsDefinition); 3383 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3384 Expr *Init); 3385 3386 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3387 Scope *S, 3388 CXXScopeSpec &SS, 3389 IdentifierInfo *MemberOrBase, 3390 ParsedType TemplateTypeTy, 3391 SourceLocation IdLoc, 3392 SourceLocation LParenLoc, 3393 Expr **Args, unsigned NumArgs, 3394 SourceLocation RParenLoc, 3395 SourceLocation EllipsisLoc); 3396 3397 MemInitResult BuildMemberInitializer(ValueDecl *Member, Expr **Args, 3398 unsigned NumArgs, SourceLocation IdLoc, 3399 SourceLocation LParenLoc, 3400 SourceLocation RParenLoc); 3401 3402 MemInitResult BuildBaseInitializer(QualType BaseType, 3403 TypeSourceInfo *BaseTInfo, 3404 Expr **Args, unsigned NumArgs, 3405 SourceLocation LParenLoc, 3406 SourceLocation RParenLoc, 3407 CXXRecordDecl *ClassDecl, 3408 SourceLocation EllipsisLoc); 3409 3410 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3411 Expr **Args, unsigned NumArgs, 3412 SourceLocation BaseLoc, 3413 SourceLocation RParenLoc, 3414 SourceLocation LParenLoc, 3415 CXXRecordDecl *ClassDecl); 3416 3417 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3418 CXXCtorInitializer *Initializer); 3419 3420 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3421 CXXCtorInitializer **Initializers, 3422 unsigned NumInitializers, bool AnyErrors); 3423 3424 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3425 3426 3427 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3428 /// mark all the non-trivial destructors of its members and bases as 3429 /// referenced. 3430 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3431 CXXRecordDecl *Record); 3432 3433 /// \brief The list of classes whose vtables have been used within 3434 /// this translation unit, and the source locations at which the 3435 /// first use occurred. 3436 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3437 3438 /// \brief The list of vtables that are required but have not yet been 3439 /// materialized. 3440 SmallVector<VTableUse, 16> VTableUses; 3441 3442 /// \brief The set of classes whose vtables have been used within 3443 /// this translation unit, and a bit that will be true if the vtable is 3444 /// required to be emitted (otherwise, it should be emitted only if needed 3445 /// by code generation). 3446 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3447 3448 /// \brief Load any externally-stored vtable uses. 3449 void LoadExternalVTableUses(); 3450 3451 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 3452 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 3453 DynamicClassesType; 3454 3455 /// \brief A list of all of the dynamic classes in this translation 3456 /// unit. 3457 DynamicClassesType DynamicClasses; 3458 3459 /// \brief Note that the vtable for the given class was used at the 3460 /// given location. 3461 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3462 bool DefinitionRequired = false); 3463 3464 /// MarkVirtualMembersReferenced - Will mark all members of the given 3465 /// CXXRecordDecl referenced. 3466 void MarkVirtualMembersReferenced(SourceLocation Loc, 3467 const CXXRecordDecl *RD); 3468 3469 /// \brief Define all of the vtables that have been used in this 3470 /// translation unit and reference any virtual members used by those 3471 /// vtables. 3472 /// 3473 /// \returns true if any work was done, false otherwise. 3474 bool DefineUsedVTables(); 3475 3476 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3477 3478 void ActOnMemInitializers(Decl *ConstructorDecl, 3479 SourceLocation ColonLoc, 3480 CXXCtorInitializer **MemInits, 3481 unsigned NumMemInits, 3482 bool AnyErrors); 3483 3484 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3485 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3486 Decl *TagDecl, 3487 SourceLocation LBrac, 3488 SourceLocation RBrac, 3489 AttributeList *AttrList); 3490 3491 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3492 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3493 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3494 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3495 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3496 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3497 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3498 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3499 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3500 bool IsInsideALocalClassWithinATemplateFunction(); 3501 3502 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3503 Expr *AssertExpr, 3504 Expr *AssertMessageExpr, 3505 SourceLocation RParenLoc); 3506 3507 FriendDecl *CheckFriendTypeDecl(SourceLocation FriendLoc, 3508 TypeSourceInfo *TSInfo); 3509 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3510 MultiTemplateParamsArg TemplateParams); 3511 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, bool IsDefinition, 3512 MultiTemplateParamsArg TemplateParams); 3513 3514 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3515 StorageClass& SC); 3516 void CheckConstructor(CXXConstructorDecl *Constructor); 3517 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3518 StorageClass& SC); 3519 bool CheckDestructor(CXXDestructorDecl *Destructor); 3520 void CheckConversionDeclarator(Declarator &D, QualType &R, 3521 StorageClass& SC); 3522 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3523 3524 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3525 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3526 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3527 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3528 void CheckExplicitlyDefaultedMoveConstructor(CXXConstructorDecl *Ctor); 3529 void CheckExplicitlyDefaultedMoveAssignment(CXXMethodDecl *Method); 3530 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3531 3532 //===--------------------------------------------------------------------===// 3533 // C++ Derived Classes 3534 // 3535 3536 /// ActOnBaseSpecifier - Parsed a base specifier 3537 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3538 SourceRange SpecifierRange, 3539 bool Virtual, AccessSpecifier Access, 3540 TypeSourceInfo *TInfo, 3541 SourceLocation EllipsisLoc); 3542 3543 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3544 SourceRange SpecifierRange, 3545 bool Virtual, AccessSpecifier Access, 3546 ParsedType basetype, 3547 SourceLocation BaseLoc, 3548 SourceLocation EllipsisLoc); 3549 3550 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3551 unsigned NumBases); 3552 void ActOnBaseSpecifiers(Decl *ClassDecl, CXXBaseSpecifier **Bases, 3553 unsigned NumBases); 3554 3555 bool IsDerivedFrom(QualType Derived, QualType Base); 3556 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3557 3558 // FIXME: I don't like this name. 3559 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3560 3561 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3562 3563 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3564 SourceLocation Loc, SourceRange Range, 3565 CXXCastPath *BasePath = 0, 3566 bool IgnoreAccess = false); 3567 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3568 unsigned InaccessibleBaseID, 3569 unsigned AmbigiousBaseConvID, 3570 SourceLocation Loc, SourceRange Range, 3571 DeclarationName Name, 3572 CXXCastPath *BasePath); 3573 3574 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3575 3576 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3577 /// covariant, according to C++ [class.virtual]p5. 3578 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3579 const CXXMethodDecl *Old); 3580 3581 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3582 /// spec is a subset of base spec. 3583 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3584 const CXXMethodDecl *Old); 3585 3586 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3587 3588 /// CheckOverrideControl - Check C++0x override control semantics. 3589 void CheckOverrideControl(const Decl *D); 3590 3591 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3592 /// overrides a virtual member function marked 'final', according to 3593 /// C++0x [class.virtual]p3. 3594 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3595 const CXXMethodDecl *Old); 3596 3597 3598 //===--------------------------------------------------------------------===// 3599 // C++ Access Control 3600 // 3601 3602 enum AccessResult { 3603 AR_accessible, 3604 AR_inaccessible, 3605 AR_dependent, 3606 AR_delayed 3607 }; 3608 3609 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3610 NamedDecl *PrevMemberDecl, 3611 AccessSpecifier LexicalAS); 3612 3613 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3614 DeclAccessPair FoundDecl); 3615 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3616 DeclAccessPair FoundDecl); 3617 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3618 SourceRange PlacementRange, 3619 CXXRecordDecl *NamingClass, 3620 DeclAccessPair FoundDecl, 3621 bool Diagnose = true); 3622 AccessResult CheckConstructorAccess(SourceLocation Loc, 3623 CXXConstructorDecl *D, 3624 const InitializedEntity &Entity, 3625 AccessSpecifier Access, 3626 bool IsCopyBindingRefToTemp = false); 3627 AccessResult CheckConstructorAccess(SourceLocation Loc, 3628 CXXConstructorDecl *D, 3629 AccessSpecifier Access, 3630 PartialDiagnostic PD); 3631 AccessResult CheckDestructorAccess(SourceLocation Loc, 3632 CXXDestructorDecl *Dtor, 3633 const PartialDiagnostic &PDiag); 3634 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3635 NamedDecl *D, 3636 const PartialDiagnostic &PDiag); 3637 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3638 Expr *ObjectExpr, 3639 Expr *ArgExpr, 3640 DeclAccessPair FoundDecl); 3641 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3642 DeclAccessPair FoundDecl); 3643 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3644 QualType Base, QualType Derived, 3645 const CXXBasePath &Path, 3646 unsigned DiagID, 3647 bool ForceCheck = false, 3648 bool ForceUnprivileged = false); 3649 void CheckLookupAccess(const LookupResult &R); 3650 3651 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3652 const MultiLevelTemplateArgumentList &TemplateArgs); 3653 void PerformDependentDiagnostics(const DeclContext *Pattern, 3654 const MultiLevelTemplateArgumentList &TemplateArgs); 3655 3656 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3657 3658 /// A flag to suppress access checking. 3659 bool SuppressAccessChecking; 3660 3661 /// \brief When true, access checking violations are treated as SFINAE 3662 /// failures rather than hard errors. 3663 bool AccessCheckingSFINAE; 3664 3665 void ActOnStartSuppressingAccessChecks(); 3666 void ActOnStopSuppressingAccessChecks(); 3667 3668 enum AbstractDiagSelID { 3669 AbstractNone = -1, 3670 AbstractReturnType, 3671 AbstractParamType, 3672 AbstractVariableType, 3673 AbstractFieldType, 3674 AbstractArrayType 3675 }; 3676 3677 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3678 const PartialDiagnostic &PD); 3679 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3680 3681 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3682 AbstractDiagSelID SelID = AbstractNone); 3683 3684 //===--------------------------------------------------------------------===// 3685 // C++ Overloaded Operators [C++ 13.5] 3686 // 3687 3688 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3689 3690 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3691 3692 //===--------------------------------------------------------------------===// 3693 // C++ Templates [C++ 14] 3694 // 3695 void FilterAcceptableTemplateNames(LookupResult &R); 3696 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3697 3698 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3699 QualType ObjectType, bool EnteringContext, 3700 bool &MemberOfUnknownSpecialization); 3701 3702 TemplateNameKind isTemplateName(Scope *S, 3703 CXXScopeSpec &SS, 3704 bool hasTemplateKeyword, 3705 UnqualifiedId &Name, 3706 ParsedType ObjectType, 3707 bool EnteringContext, 3708 TemplateTy &Template, 3709 bool &MemberOfUnknownSpecialization); 3710 3711 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3712 SourceLocation IILoc, 3713 Scope *S, 3714 const CXXScopeSpec *SS, 3715 TemplateTy &SuggestedTemplate, 3716 TemplateNameKind &SuggestedKind); 3717 3718 bool DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3719 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3720 3721 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3722 SourceLocation EllipsisLoc, 3723 SourceLocation KeyLoc, 3724 IdentifierInfo *ParamName, 3725 SourceLocation ParamNameLoc, 3726 unsigned Depth, unsigned Position, 3727 SourceLocation EqualLoc, 3728 ParsedType DefaultArg); 3729 3730 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3731 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3732 unsigned Depth, 3733 unsigned Position, 3734 SourceLocation EqualLoc, 3735 Expr *DefaultArg); 3736 Decl *ActOnTemplateTemplateParameter(Scope *S, 3737 SourceLocation TmpLoc, 3738 TemplateParameterList *Params, 3739 SourceLocation EllipsisLoc, 3740 IdentifierInfo *ParamName, 3741 SourceLocation ParamNameLoc, 3742 unsigned Depth, 3743 unsigned Position, 3744 SourceLocation EqualLoc, 3745 ParsedTemplateArgument DefaultArg); 3746 3747 TemplateParameterList * 3748 ActOnTemplateParameterList(unsigned Depth, 3749 SourceLocation ExportLoc, 3750 SourceLocation TemplateLoc, 3751 SourceLocation LAngleLoc, 3752 Decl **Params, unsigned NumParams, 3753 SourceLocation RAngleLoc); 3754 3755 /// \brief The context in which we are checking a template parameter 3756 /// list. 3757 enum TemplateParamListContext { 3758 TPC_ClassTemplate, 3759 TPC_FunctionTemplate, 3760 TPC_ClassTemplateMember, 3761 TPC_FriendFunctionTemplate, 3762 TPC_FriendFunctionTemplateDefinition, 3763 TPC_TypeAliasTemplate 3764 }; 3765 3766 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3767 TemplateParameterList *OldParams, 3768 TemplateParamListContext TPC); 3769 TemplateParameterList * 3770 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3771 SourceLocation DeclLoc, 3772 const CXXScopeSpec &SS, 3773 TemplateParameterList **ParamLists, 3774 unsigned NumParamLists, 3775 bool IsFriend, 3776 bool &IsExplicitSpecialization, 3777 bool &Invalid); 3778 3779 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3780 SourceLocation KWLoc, CXXScopeSpec &SS, 3781 IdentifierInfo *Name, SourceLocation NameLoc, 3782 AttributeList *Attr, 3783 TemplateParameterList *TemplateParams, 3784 AccessSpecifier AS, 3785 SourceLocation ModulePrivateLoc, 3786 unsigned NumOuterTemplateParamLists, 3787 TemplateParameterList **OuterTemplateParamLists); 3788 3789 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3790 TemplateArgumentListInfo &Out); 3791 3792 void NoteAllFoundTemplates(TemplateName Name); 3793 3794 QualType CheckTemplateIdType(TemplateName Template, 3795 SourceLocation TemplateLoc, 3796 TemplateArgumentListInfo &TemplateArgs); 3797 3798 TypeResult 3799 ActOnTemplateIdType(CXXScopeSpec &SS, 3800 TemplateTy Template, SourceLocation TemplateLoc, 3801 SourceLocation LAngleLoc, 3802 ASTTemplateArgsPtr TemplateArgs, 3803 SourceLocation RAngleLoc); 3804 3805 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3806 /// such as \c class T::template apply<U>. 3807 /// 3808 /// \param TUK 3809 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3810 TypeSpecifierType TagSpec, 3811 SourceLocation TagLoc, 3812 CXXScopeSpec &SS, 3813 TemplateTy TemplateD, 3814 SourceLocation TemplateLoc, 3815 SourceLocation LAngleLoc, 3816 ASTTemplateArgsPtr TemplateArgsIn, 3817 SourceLocation RAngleLoc); 3818 3819 3820 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3821 LookupResult &R, 3822 bool RequiresADL, 3823 const TemplateArgumentListInfo &TemplateArgs); 3824 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3825 const DeclarationNameInfo &NameInfo, 3826 const TemplateArgumentListInfo &TemplateArgs); 3827 3828 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3829 SourceLocation TemplateKWLoc, 3830 CXXScopeSpec &SS, 3831 UnqualifiedId &Name, 3832 ParsedType ObjectType, 3833 bool EnteringContext, 3834 TemplateTy &Template); 3835 3836 DeclResult 3837 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3838 SourceLocation KWLoc, 3839 CXXScopeSpec &SS, 3840 TemplateTy Template, 3841 SourceLocation TemplateNameLoc, 3842 SourceLocation LAngleLoc, 3843 ASTTemplateArgsPtr TemplateArgs, 3844 SourceLocation RAngleLoc, 3845 AttributeList *Attr, 3846 MultiTemplateParamsArg TemplateParameterLists); 3847 3848 Decl *ActOnTemplateDeclarator(Scope *S, 3849 MultiTemplateParamsArg TemplateParameterLists, 3850 Declarator &D); 3851 3852 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3853 MultiTemplateParamsArg TemplateParameterLists, 3854 Declarator &D); 3855 3856 bool 3857 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3858 TemplateSpecializationKind NewTSK, 3859 NamedDecl *PrevDecl, 3860 TemplateSpecializationKind PrevTSK, 3861 SourceLocation PrevPtOfInstantiation, 3862 bool &SuppressNew); 3863 3864 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3865 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3866 LookupResult &Previous); 3867 3868 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 3869 TemplateArgumentListInfo *ExplicitTemplateArgs, 3870 LookupResult &Previous); 3871 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 3872 3873 DeclResult 3874 ActOnExplicitInstantiation(Scope *S, 3875 SourceLocation ExternLoc, 3876 SourceLocation TemplateLoc, 3877 unsigned TagSpec, 3878 SourceLocation KWLoc, 3879 const CXXScopeSpec &SS, 3880 TemplateTy Template, 3881 SourceLocation TemplateNameLoc, 3882 SourceLocation LAngleLoc, 3883 ASTTemplateArgsPtr TemplateArgs, 3884 SourceLocation RAngleLoc, 3885 AttributeList *Attr); 3886 3887 DeclResult 3888 ActOnExplicitInstantiation(Scope *S, 3889 SourceLocation ExternLoc, 3890 SourceLocation TemplateLoc, 3891 unsigned TagSpec, 3892 SourceLocation KWLoc, 3893 CXXScopeSpec &SS, 3894 IdentifierInfo *Name, 3895 SourceLocation NameLoc, 3896 AttributeList *Attr); 3897 3898 DeclResult ActOnExplicitInstantiation(Scope *S, 3899 SourceLocation ExternLoc, 3900 SourceLocation TemplateLoc, 3901 Declarator &D); 3902 3903 TemplateArgumentLoc 3904 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 3905 SourceLocation TemplateLoc, 3906 SourceLocation RAngleLoc, 3907 Decl *Param, 3908 SmallVectorImpl<TemplateArgument> &Converted); 3909 3910 /// \brief Specifies the context in which a particular template 3911 /// argument is being checked. 3912 enum CheckTemplateArgumentKind { 3913 /// \brief The template argument was specified in the code or was 3914 /// instantiated with some deduced template arguments. 3915 CTAK_Specified, 3916 3917 /// \brief The template argument was deduced via template argument 3918 /// deduction. 3919 CTAK_Deduced, 3920 3921 /// \brief The template argument was deduced from an array bound 3922 /// via template argument deduction. 3923 CTAK_DeducedFromArrayBound 3924 }; 3925 3926 bool CheckTemplateArgument(NamedDecl *Param, 3927 const TemplateArgumentLoc &Arg, 3928 NamedDecl *Template, 3929 SourceLocation TemplateLoc, 3930 SourceLocation RAngleLoc, 3931 unsigned ArgumentPackIndex, 3932 SmallVectorImpl<TemplateArgument> &Converted, 3933 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3934 3935 /// \brief Check that the given template arguments can be be provided to 3936 /// the given template, converting the arguments along the way. 3937 /// 3938 /// \param Template The template to which the template arguments are being 3939 /// provided. 3940 /// 3941 /// \param TemplateLoc The location of the template name in the source. 3942 /// 3943 /// \param TemplateArgs The list of template arguments. If the template is 3944 /// a template template parameter, this function may extend the set of 3945 /// template arguments to also include substituted, defaulted template 3946 /// arguments. 3947 /// 3948 /// \param PartialTemplateArgs True if the list of template arguments is 3949 /// intentionally partial, e.g., because we're checking just the initial 3950 /// set of template arguments. 3951 /// 3952 /// \param Converted Will receive the converted, canonicalized template 3953 /// arguments. 3954 /// 3955 /// \returns True if an error occurred, false otherwise. 3956 bool CheckTemplateArgumentList(TemplateDecl *Template, 3957 SourceLocation TemplateLoc, 3958 TemplateArgumentListInfo &TemplateArgs, 3959 bool PartialTemplateArgs, 3960 SmallVectorImpl<TemplateArgument> &Converted); 3961 3962 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 3963 const TemplateArgumentLoc &Arg, 3964 SmallVectorImpl<TemplateArgument> &Converted); 3965 3966 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 3967 TypeSourceInfo *Arg); 3968 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 3969 TemplateArgument &Converted); 3970 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 3971 QualType InstantiatedParamType, Expr *Arg, 3972 TemplateArgument &Converted, 3973 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3974 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 3975 const TemplateArgumentLoc &Arg); 3976 3977 ExprResult 3978 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 3979 QualType ParamType, 3980 SourceLocation Loc); 3981 ExprResult 3982 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 3983 SourceLocation Loc); 3984 3985 /// \brief Enumeration describing how template parameter lists are compared 3986 /// for equality. 3987 enum TemplateParameterListEqualKind { 3988 /// \brief We are matching the template parameter lists of two templates 3989 /// that might be redeclarations. 3990 /// 3991 /// \code 3992 /// template<typename T> struct X; 3993 /// template<typename T> struct X; 3994 /// \endcode 3995 TPL_TemplateMatch, 3996 3997 /// \brief We are matching the template parameter lists of two template 3998 /// template parameters as part of matching the template parameter lists 3999 /// of two templates that might be redeclarations. 4000 /// 4001 /// \code 4002 /// template<template<int I> class TT> struct X; 4003 /// template<template<int Value> class Other> struct X; 4004 /// \endcode 4005 TPL_TemplateTemplateParmMatch, 4006 4007 /// \brief We are matching the template parameter lists of a template 4008 /// template argument against the template parameter lists of a template 4009 /// template parameter. 4010 /// 4011 /// \code 4012 /// template<template<int Value> class Metafun> struct X; 4013 /// template<int Value> struct integer_c; 4014 /// X<integer_c> xic; 4015 /// \endcode 4016 TPL_TemplateTemplateArgumentMatch 4017 }; 4018 4019 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 4020 TemplateParameterList *Old, 4021 bool Complain, 4022 TemplateParameterListEqualKind Kind, 4023 SourceLocation TemplateArgLoc 4024 = SourceLocation()); 4025 4026 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 4027 4028 /// \brief Called when the parser has parsed a C++ typename 4029 /// specifier, e.g., "typename T::type". 4030 /// 4031 /// \param S The scope in which this typename type occurs. 4032 /// \param TypenameLoc the location of the 'typename' keyword 4033 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4034 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 4035 /// \param IdLoc the location of the identifier. 4036 TypeResult 4037 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4038 const CXXScopeSpec &SS, const IdentifierInfo &II, 4039 SourceLocation IdLoc); 4040 4041 /// \brief Called when the parser has parsed a C++ typename 4042 /// specifier that ends in a template-id, e.g., 4043 /// "typename MetaFun::template apply<T1, T2>". 4044 /// 4045 /// \param S The scope in which this typename type occurs. 4046 /// \param TypenameLoc the location of the 'typename' keyword 4047 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4048 /// \param TemplateLoc the location of the 'template' keyword, if any. 4049 /// \param TemplateName The template name. 4050 /// \param TemplateNameLoc The location of the template name. 4051 /// \param LAngleLoc The location of the opening angle bracket ('<'). 4052 /// \param TemplateArgs The template arguments. 4053 /// \param RAngleLoc The location of the closing angle bracket ('>'). 4054 TypeResult 4055 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4056 const CXXScopeSpec &SS, 4057 SourceLocation TemplateLoc, 4058 TemplateTy Template, 4059 SourceLocation TemplateNameLoc, 4060 SourceLocation LAngleLoc, 4061 ASTTemplateArgsPtr TemplateArgs, 4062 SourceLocation RAngleLoc); 4063 4064 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 4065 SourceLocation KeywordLoc, 4066 NestedNameSpecifierLoc QualifierLoc, 4067 const IdentifierInfo &II, 4068 SourceLocation IILoc); 4069 4070 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 4071 SourceLocation Loc, 4072 DeclarationName Name); 4073 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 4074 4075 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 4076 4077 std::string 4078 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4079 const TemplateArgumentList &Args); 4080 4081 std::string 4082 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4083 const TemplateArgument *Args, 4084 unsigned NumArgs); 4085 4086 //===--------------------------------------------------------------------===// 4087 // C++ Variadic Templates (C++0x [temp.variadic]) 4088 //===--------------------------------------------------------------------===// 4089 4090 /// \brief The context in which an unexpanded parameter pack is 4091 /// being diagnosed. 4092 /// 4093 /// Note that the values of this enumeration line up with the first 4094 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4095 enum UnexpandedParameterPackContext { 4096 /// \brief An arbitrary expression. 4097 UPPC_Expression = 0, 4098 4099 /// \brief The base type of a class type. 4100 UPPC_BaseType, 4101 4102 /// \brief The type of an arbitrary declaration. 4103 UPPC_DeclarationType, 4104 4105 /// \brief The type of a data member. 4106 UPPC_DataMemberType, 4107 4108 /// \brief The size of a bit-field. 4109 UPPC_BitFieldWidth, 4110 4111 /// \brief The expression in a static assertion. 4112 UPPC_StaticAssertExpression, 4113 4114 /// \brief The fixed underlying type of an enumeration. 4115 UPPC_FixedUnderlyingType, 4116 4117 /// \brief The enumerator value. 4118 UPPC_EnumeratorValue, 4119 4120 /// \brief A using declaration. 4121 UPPC_UsingDeclaration, 4122 4123 /// \brief A friend declaration. 4124 UPPC_FriendDeclaration, 4125 4126 /// \brief A declaration qualifier. 4127 UPPC_DeclarationQualifier, 4128 4129 /// \brief An initializer. 4130 UPPC_Initializer, 4131 4132 /// \brief A default argument. 4133 UPPC_DefaultArgument, 4134 4135 /// \brief The type of a non-type template parameter. 4136 UPPC_NonTypeTemplateParameterType, 4137 4138 /// \brief The type of an exception. 4139 UPPC_ExceptionType, 4140 4141 /// \brief Partial specialization. 4142 UPPC_PartialSpecialization 4143 }; 4144 4145 /// \brief If the given type contains an unexpanded parameter pack, 4146 /// diagnose the error. 4147 /// 4148 /// \param Loc The source location where a diagnostc should be emitted. 4149 /// 4150 /// \param T The type that is being checked for unexpanded parameter 4151 /// packs. 4152 /// 4153 /// \returns true if an error occurred, false otherwise. 4154 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4155 UnexpandedParameterPackContext UPPC); 4156 4157 /// \brief If the given expression contains an unexpanded parameter 4158 /// pack, diagnose the error. 4159 /// 4160 /// \param E The expression that is being checked for unexpanded 4161 /// parameter packs. 4162 /// 4163 /// \returns true if an error occurred, false otherwise. 4164 bool DiagnoseUnexpandedParameterPack(Expr *E, 4165 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4166 4167 /// \brief If the given nested-name-specifier contains an unexpanded 4168 /// parameter pack, diagnose the error. 4169 /// 4170 /// \param SS The nested-name-specifier that is being checked for 4171 /// unexpanded parameter packs. 4172 /// 4173 /// \returns true if an error occurred, false otherwise. 4174 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4175 UnexpandedParameterPackContext UPPC); 4176 4177 /// \brief If the given name contains an unexpanded parameter pack, 4178 /// diagnose the error. 4179 /// 4180 /// \param NameInfo The name (with source location information) that 4181 /// is being checked for unexpanded parameter packs. 4182 /// 4183 /// \returns true if an error occurred, false otherwise. 4184 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4185 UnexpandedParameterPackContext UPPC); 4186 4187 /// \brief If the given template name contains an unexpanded parameter pack, 4188 /// diagnose the error. 4189 /// 4190 /// \param Loc The location of the template name. 4191 /// 4192 /// \param Template The template name that is being checked for unexpanded 4193 /// parameter packs. 4194 /// 4195 /// \returns true if an error occurred, false otherwise. 4196 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4197 TemplateName Template, 4198 UnexpandedParameterPackContext UPPC); 4199 4200 /// \brief If the given template argument contains an unexpanded parameter 4201 /// pack, diagnose the error. 4202 /// 4203 /// \param Arg The template argument that is being checked for unexpanded 4204 /// parameter packs. 4205 /// 4206 /// \returns true if an error occurred, false otherwise. 4207 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4208 UnexpandedParameterPackContext UPPC); 4209 4210 /// \brief Collect the set of unexpanded parameter packs within the given 4211 /// template argument. 4212 /// 4213 /// \param Arg The template argument that will be traversed to find 4214 /// unexpanded parameter packs. 4215 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4216 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4217 4218 /// \brief Collect the set of unexpanded parameter packs within the given 4219 /// template argument. 4220 /// 4221 /// \param Arg The template argument that will be traversed to find 4222 /// unexpanded parameter packs. 4223 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4224 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4225 4226 /// \brief Collect the set of unexpanded parameter packs within the given 4227 /// type. 4228 /// 4229 /// \param T The type that will be traversed to find 4230 /// unexpanded parameter packs. 4231 void collectUnexpandedParameterPacks(QualType T, 4232 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4233 4234 /// \brief Collect the set of unexpanded parameter packs within the given 4235 /// type. 4236 /// 4237 /// \param TL The type that will be traversed to find 4238 /// unexpanded parameter packs. 4239 void collectUnexpandedParameterPacks(TypeLoc TL, 4240 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4241 4242 /// \brief Invoked when parsing a template argument followed by an 4243 /// ellipsis, which creates a pack expansion. 4244 /// 4245 /// \param Arg The template argument preceding the ellipsis, which 4246 /// may already be invalid. 4247 /// 4248 /// \param EllipsisLoc The location of the ellipsis. 4249 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4250 SourceLocation EllipsisLoc); 4251 4252 /// \brief Invoked when parsing a type followed by an ellipsis, which 4253 /// creates a pack expansion. 4254 /// 4255 /// \param Type The type preceding the ellipsis, which will become 4256 /// the pattern of the pack expansion. 4257 /// 4258 /// \param EllipsisLoc The location of the ellipsis. 4259 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4260 4261 /// \brief Construct a pack expansion type from the pattern of the pack 4262 /// expansion. 4263 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4264 SourceLocation EllipsisLoc, 4265 llvm::Optional<unsigned> NumExpansions); 4266 4267 /// \brief Construct a pack expansion type from the pattern of the pack 4268 /// expansion. 4269 QualType CheckPackExpansion(QualType Pattern, 4270 SourceRange PatternRange, 4271 SourceLocation EllipsisLoc, 4272 llvm::Optional<unsigned> NumExpansions); 4273 4274 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4275 /// creates a pack expansion. 4276 /// 4277 /// \param Pattern The expression preceding the ellipsis, which will become 4278 /// the pattern of the pack expansion. 4279 /// 4280 /// \param EllipsisLoc The location of the ellipsis. 4281 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4282 4283 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4284 /// creates a pack expansion. 4285 /// 4286 /// \param Pattern The expression preceding the ellipsis, which will become 4287 /// the pattern of the pack expansion. 4288 /// 4289 /// \param EllipsisLoc The location of the ellipsis. 4290 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4291 llvm::Optional<unsigned> NumExpansions); 4292 4293 /// \brief Determine whether we could expand a pack expansion with the 4294 /// given set of parameter packs into separate arguments by repeatedly 4295 /// transforming the pattern. 4296 /// 4297 /// \param EllipsisLoc The location of the ellipsis that identifies the 4298 /// pack expansion. 4299 /// 4300 /// \param PatternRange The source range that covers the entire pattern of 4301 /// the pack expansion. 4302 /// 4303 /// \param Unexpanded The set of unexpanded parameter packs within the 4304 /// pattern. 4305 /// 4306 /// \param NumUnexpanded The number of unexpanded parameter packs in 4307 /// \p Unexpanded. 4308 /// 4309 /// \param ShouldExpand Will be set to \c true if the transformer should 4310 /// expand the corresponding pack expansions into separate arguments. When 4311 /// set, \c NumExpansions must also be set. 4312 /// 4313 /// \param RetainExpansion Whether the caller should add an unexpanded 4314 /// pack expansion after all of the expanded arguments. This is used 4315 /// when extending explicitly-specified template argument packs per 4316 /// C++0x [temp.arg.explicit]p9. 4317 /// 4318 /// \param NumExpansions The number of separate arguments that will be in 4319 /// the expanded form of the corresponding pack expansion. This is both an 4320 /// input and an output parameter, which can be set by the caller if the 4321 /// number of expansions is known a priori (e.g., due to a prior substitution) 4322 /// and will be set by the callee when the number of expansions is known. 4323 /// The callee must set this value when \c ShouldExpand is \c true; it may 4324 /// set this value in other cases. 4325 /// 4326 /// \returns true if an error occurred (e.g., because the parameter packs 4327 /// are to be instantiated with arguments of different lengths), false 4328 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4329 /// must be set. 4330 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4331 SourceRange PatternRange, 4332 const UnexpandedParameterPack *Unexpanded, 4333 unsigned NumUnexpanded, 4334 const MultiLevelTemplateArgumentList &TemplateArgs, 4335 bool &ShouldExpand, 4336 bool &RetainExpansion, 4337 llvm::Optional<unsigned> &NumExpansions); 4338 4339 /// \brief Determine the number of arguments in the given pack expansion 4340 /// type. 4341 /// 4342 /// This routine already assumes that the pack expansion type can be 4343 /// expanded and that the number of arguments in the expansion is 4344 /// consistent across all of the unexpanded parameter packs in its pattern. 4345 unsigned getNumArgumentsInExpansion(QualType T, 4346 const MultiLevelTemplateArgumentList &TemplateArgs); 4347 4348 /// \brief Determine whether the given declarator contains any unexpanded 4349 /// parameter packs. 4350 /// 4351 /// This routine is used by the parser to disambiguate function declarators 4352 /// with an ellipsis prior to the ')', e.g., 4353 /// 4354 /// \code 4355 /// void f(T...); 4356 /// \endcode 4357 /// 4358 /// To determine whether we have an (unnamed) function parameter pack or 4359 /// a variadic function. 4360 /// 4361 /// \returns true if the declarator contains any unexpanded parameter packs, 4362 /// false otherwise. 4363 bool containsUnexpandedParameterPacks(Declarator &D); 4364 4365 //===--------------------------------------------------------------------===// 4366 // C++ Template Argument Deduction (C++ [temp.deduct]) 4367 //===--------------------------------------------------------------------===// 4368 4369 /// \brief Describes the result of template argument deduction. 4370 /// 4371 /// The TemplateDeductionResult enumeration describes the result of 4372 /// template argument deduction, as returned from 4373 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4374 /// structure provides additional information about the results of 4375 /// template argument deduction, e.g., the deduced template argument 4376 /// list (if successful) or the specific template parameters or 4377 /// deduced arguments that were involved in the failure. 4378 enum TemplateDeductionResult { 4379 /// \brief Template argument deduction was successful. 4380 TDK_Success = 0, 4381 /// \brief Template argument deduction exceeded the maximum template 4382 /// instantiation depth (which has already been diagnosed). 4383 TDK_InstantiationDepth, 4384 /// \brief Template argument deduction did not deduce a value 4385 /// for every template parameter. 4386 TDK_Incomplete, 4387 /// \brief Template argument deduction produced inconsistent 4388 /// deduced values for the given template parameter. 4389 TDK_Inconsistent, 4390 /// \brief Template argument deduction failed due to inconsistent 4391 /// cv-qualifiers on a template parameter type that would 4392 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4393 /// but were given a non-const "X". 4394 TDK_Underqualified, 4395 /// \brief Substitution of the deduced template argument values 4396 /// resulted in an error. 4397 TDK_SubstitutionFailure, 4398 /// \brief Substitution of the deduced template argument values 4399 /// into a non-deduced context produced a type or value that 4400 /// produces a type that does not match the original template 4401 /// arguments provided. 4402 TDK_NonDeducedMismatch, 4403 /// \brief When performing template argument deduction for a function 4404 /// template, there were too many call arguments. 4405 TDK_TooManyArguments, 4406 /// \brief When performing template argument deduction for a function 4407 /// template, there were too few call arguments. 4408 TDK_TooFewArguments, 4409 /// \brief The explicitly-specified template arguments were not valid 4410 /// template arguments for the given template. 4411 TDK_InvalidExplicitArguments, 4412 /// \brief The arguments included an overloaded function name that could 4413 /// not be resolved to a suitable function. 4414 TDK_FailedOverloadResolution 4415 }; 4416 4417 TemplateDeductionResult 4418 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4419 const TemplateArgumentList &TemplateArgs, 4420 sema::TemplateDeductionInfo &Info); 4421 4422 TemplateDeductionResult 4423 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4424 TemplateArgumentListInfo &ExplicitTemplateArgs, 4425 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4426 SmallVectorImpl<QualType> &ParamTypes, 4427 QualType *FunctionType, 4428 sema::TemplateDeductionInfo &Info); 4429 4430 /// brief A function argument from which we performed template argument 4431 // deduction for a call. 4432 struct OriginalCallArg { 4433 OriginalCallArg(QualType OriginalParamType, 4434 unsigned ArgIdx, 4435 QualType OriginalArgType) 4436 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4437 OriginalArgType(OriginalArgType) { } 4438 4439 QualType OriginalParamType; 4440 unsigned ArgIdx; 4441 QualType OriginalArgType; 4442 }; 4443 4444 TemplateDeductionResult 4445 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4446 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4447 unsigned NumExplicitlySpecified, 4448 FunctionDecl *&Specialization, 4449 sema::TemplateDeductionInfo &Info, 4450 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4451 4452 TemplateDeductionResult 4453 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4454 TemplateArgumentListInfo *ExplicitTemplateArgs, 4455 Expr **Args, unsigned NumArgs, 4456 FunctionDecl *&Specialization, 4457 sema::TemplateDeductionInfo &Info); 4458 4459 TemplateDeductionResult 4460 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4461 TemplateArgumentListInfo *ExplicitTemplateArgs, 4462 QualType ArgFunctionType, 4463 FunctionDecl *&Specialization, 4464 sema::TemplateDeductionInfo &Info); 4465 4466 TemplateDeductionResult 4467 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4468 QualType ToType, 4469 CXXConversionDecl *&Specialization, 4470 sema::TemplateDeductionInfo &Info); 4471 4472 TemplateDeductionResult 4473 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4474 TemplateArgumentListInfo *ExplicitTemplateArgs, 4475 FunctionDecl *&Specialization, 4476 sema::TemplateDeductionInfo &Info); 4477 4478 bool DeduceAutoType(TypeSourceInfo *AutoType, Expr *Initializer, 4479 TypeSourceInfo *&Result); 4480 4481 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4482 FunctionTemplateDecl *FT2, 4483 SourceLocation Loc, 4484 TemplatePartialOrderingContext TPOC, 4485 unsigned NumCallArguments); 4486 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4487 UnresolvedSetIterator SEnd, 4488 TemplatePartialOrderingContext TPOC, 4489 unsigned NumCallArguments, 4490 SourceLocation Loc, 4491 const PartialDiagnostic &NoneDiag, 4492 const PartialDiagnostic &AmbigDiag, 4493 const PartialDiagnostic &CandidateDiag, 4494 bool Complain = true); 4495 4496 ClassTemplatePartialSpecializationDecl * 4497 getMoreSpecializedPartialSpecialization( 4498 ClassTemplatePartialSpecializationDecl *PS1, 4499 ClassTemplatePartialSpecializationDecl *PS2, 4500 SourceLocation Loc); 4501 4502 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4503 bool OnlyDeduced, 4504 unsigned Depth, 4505 SmallVectorImpl<bool> &Used); 4506 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4507 SmallVectorImpl<bool> &Deduced); 4508 4509 //===--------------------------------------------------------------------===// 4510 // C++ Template Instantiation 4511 // 4512 4513 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4514 const TemplateArgumentList *Innermost = 0, 4515 bool RelativeToPrimary = false, 4516 const FunctionDecl *Pattern = 0); 4517 4518 /// \brief A template instantiation that is currently in progress. 4519 struct ActiveTemplateInstantiation { 4520 /// \brief The kind of template instantiation we are performing 4521 enum InstantiationKind { 4522 /// We are instantiating a template declaration. The entity is 4523 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4524 TemplateInstantiation, 4525 4526 /// We are instantiating a default argument for a template 4527 /// parameter. The Entity is the template, and 4528 /// TemplateArgs/NumTemplateArguments provides the template 4529 /// arguments as specified. 4530 /// FIXME: Use a TemplateArgumentList 4531 DefaultTemplateArgumentInstantiation, 4532 4533 /// We are instantiating a default argument for a function. 4534 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4535 /// provides the template arguments as specified. 4536 DefaultFunctionArgumentInstantiation, 4537 4538 /// We are substituting explicit template arguments provided for 4539 /// a function template. The entity is a FunctionTemplateDecl. 4540 ExplicitTemplateArgumentSubstitution, 4541 4542 /// We are substituting template argument determined as part of 4543 /// template argument deduction for either a class template 4544 /// partial specialization or a function template. The 4545 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4546 /// a FunctionTemplateDecl. 4547 DeducedTemplateArgumentSubstitution, 4548 4549 /// We are substituting prior template arguments into a new 4550 /// template parameter. The template parameter itself is either a 4551 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4552 PriorTemplateArgumentSubstitution, 4553 4554 /// We are checking the validity of a default template argument that 4555 /// has been used when naming a template-id. 4556 DefaultTemplateArgumentChecking 4557 } Kind; 4558 4559 /// \brief The point of instantiation within the source code. 4560 SourceLocation PointOfInstantiation; 4561 4562 /// \brief The template (or partial specialization) in which we are 4563 /// performing the instantiation, for substitutions of prior template 4564 /// arguments. 4565 NamedDecl *Template; 4566 4567 /// \brief The entity that is being instantiated. 4568 uintptr_t Entity; 4569 4570 /// \brief The list of template arguments we are substituting, if they 4571 /// are not part of the entity. 4572 const TemplateArgument *TemplateArgs; 4573 4574 /// \brief The number of template arguments in TemplateArgs. 4575 unsigned NumTemplateArgs; 4576 4577 /// \brief The template deduction info object associated with the 4578 /// substitution or checking of explicit or deduced template arguments. 4579 sema::TemplateDeductionInfo *DeductionInfo; 4580 4581 /// \brief The source range that covers the construct that cause 4582 /// the instantiation, e.g., the template-id that causes a class 4583 /// template instantiation. 4584 SourceRange InstantiationRange; 4585 4586 ActiveTemplateInstantiation() 4587 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4588 NumTemplateArgs(0), DeductionInfo(0) {} 4589 4590 /// \brief Determines whether this template is an actual instantiation 4591 /// that should be counted toward the maximum instantiation depth. 4592 bool isInstantiationRecord() const; 4593 4594 friend bool operator==(const ActiveTemplateInstantiation &X, 4595 const ActiveTemplateInstantiation &Y) { 4596 if (X.Kind != Y.Kind) 4597 return false; 4598 4599 if (X.Entity != Y.Entity) 4600 return false; 4601 4602 switch (X.Kind) { 4603 case TemplateInstantiation: 4604 return true; 4605 4606 case PriorTemplateArgumentSubstitution: 4607 case DefaultTemplateArgumentChecking: 4608 if (X.Template != Y.Template) 4609 return false; 4610 4611 // Fall through 4612 4613 case DefaultTemplateArgumentInstantiation: 4614 case ExplicitTemplateArgumentSubstitution: 4615 case DeducedTemplateArgumentSubstitution: 4616 case DefaultFunctionArgumentInstantiation: 4617 return X.TemplateArgs == Y.TemplateArgs; 4618 4619 } 4620 4621 return true; 4622 } 4623 4624 friend bool operator!=(const ActiveTemplateInstantiation &X, 4625 const ActiveTemplateInstantiation &Y) { 4626 return !(X == Y); 4627 } 4628 }; 4629 4630 /// \brief List of active template instantiations. 4631 /// 4632 /// This vector is treated as a stack. As one template instantiation 4633 /// requires another template instantiation, additional 4634 /// instantiations are pushed onto the stack up to a 4635 /// user-configurable limit LangOptions::InstantiationDepth. 4636 SmallVector<ActiveTemplateInstantiation, 16> 4637 ActiveTemplateInstantiations; 4638 4639 /// \brief Whether we are in a SFINAE context that is not associated with 4640 /// template instantiation. 4641 /// 4642 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4643 /// of a template instantiation or template argument deduction. 4644 bool InNonInstantiationSFINAEContext; 4645 4646 /// \brief The number of ActiveTemplateInstantiation entries in 4647 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4648 /// therefore, should not be counted as part of the instantiation depth. 4649 unsigned NonInstantiationEntries; 4650 4651 /// \brief The last template from which a template instantiation 4652 /// error or warning was produced. 4653 /// 4654 /// This value is used to suppress printing of redundant template 4655 /// instantiation backtraces when there are multiple errors in the 4656 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4657 /// to implement it anywhere else. 4658 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4659 4660 /// \brief The current index into pack expansion arguments that will be 4661 /// used for substitution of parameter packs. 4662 /// 4663 /// The pack expansion index will be -1 to indicate that parameter packs 4664 /// should be instantiated as themselves. Otherwise, the index specifies 4665 /// which argument within the parameter pack will be used for substitution. 4666 int ArgumentPackSubstitutionIndex; 4667 4668 /// \brief RAII object used to change the argument pack substitution index 4669 /// within a \c Sema object. 4670 /// 4671 /// See \c ArgumentPackSubstitutionIndex for more information. 4672 class ArgumentPackSubstitutionIndexRAII { 4673 Sema &Self; 4674 int OldSubstitutionIndex; 4675 4676 public: 4677 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4678 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4679 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4680 } 4681 4682 ~ArgumentPackSubstitutionIndexRAII() { 4683 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4684 } 4685 }; 4686 4687 friend class ArgumentPackSubstitutionRAII; 4688 4689 /// \brief The stack of calls expression undergoing template instantiation. 4690 /// 4691 /// The top of this stack is used by a fixit instantiating unresolved 4692 /// function calls to fix the AST to match the textual change it prints. 4693 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4694 4695 /// \brief For each declaration that involved template argument deduction, the 4696 /// set of diagnostics that were suppressed during that template argument 4697 /// deduction. 4698 /// 4699 /// FIXME: Serialize this structure to the AST file. 4700 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 4701 SuppressedDiagnostics; 4702 4703 /// \brief A stack object to be created when performing template 4704 /// instantiation. 4705 /// 4706 /// Construction of an object of type \c InstantiatingTemplate 4707 /// pushes the current instantiation onto the stack of active 4708 /// instantiations. If the size of this stack exceeds the maximum 4709 /// number of recursive template instantiations, construction 4710 /// produces an error and evaluates true. 4711 /// 4712 /// Destruction of this object will pop the named instantiation off 4713 /// the stack. 4714 struct InstantiatingTemplate { 4715 /// \brief Note that we are instantiating a class template, 4716 /// function template, or a member thereof. 4717 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4718 Decl *Entity, 4719 SourceRange InstantiationRange = SourceRange()); 4720 4721 /// \brief Note that we are instantiating a default argument in a 4722 /// template-id. 4723 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4724 TemplateDecl *Template, 4725 const TemplateArgument *TemplateArgs, 4726 unsigned NumTemplateArgs, 4727 SourceRange InstantiationRange = SourceRange()); 4728 4729 /// \brief Note that we are instantiating a default argument in a 4730 /// template-id. 4731 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4732 FunctionTemplateDecl *FunctionTemplate, 4733 const TemplateArgument *TemplateArgs, 4734 unsigned NumTemplateArgs, 4735 ActiveTemplateInstantiation::InstantiationKind Kind, 4736 sema::TemplateDeductionInfo &DeductionInfo, 4737 SourceRange InstantiationRange = SourceRange()); 4738 4739 /// \brief Note that we are instantiating as part of template 4740 /// argument deduction for a class template partial 4741 /// specialization. 4742 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4743 ClassTemplatePartialSpecializationDecl *PartialSpec, 4744 const TemplateArgument *TemplateArgs, 4745 unsigned NumTemplateArgs, 4746 sema::TemplateDeductionInfo &DeductionInfo, 4747 SourceRange InstantiationRange = SourceRange()); 4748 4749 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4750 ParmVarDecl *Param, 4751 const TemplateArgument *TemplateArgs, 4752 unsigned NumTemplateArgs, 4753 SourceRange InstantiationRange = SourceRange()); 4754 4755 /// \brief Note that we are substituting prior template arguments into a 4756 /// non-type or template template parameter. 4757 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4758 NamedDecl *Template, 4759 NonTypeTemplateParmDecl *Param, 4760 const TemplateArgument *TemplateArgs, 4761 unsigned NumTemplateArgs, 4762 SourceRange InstantiationRange); 4763 4764 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4765 NamedDecl *Template, 4766 TemplateTemplateParmDecl *Param, 4767 const TemplateArgument *TemplateArgs, 4768 unsigned NumTemplateArgs, 4769 SourceRange InstantiationRange); 4770 4771 /// \brief Note that we are checking the default template argument 4772 /// against the template parameter for a given template-id. 4773 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4774 TemplateDecl *Template, 4775 NamedDecl *Param, 4776 const TemplateArgument *TemplateArgs, 4777 unsigned NumTemplateArgs, 4778 SourceRange InstantiationRange); 4779 4780 4781 /// \brief Note that we have finished instantiating this template. 4782 void Clear(); 4783 4784 ~InstantiatingTemplate() { Clear(); } 4785 4786 /// \brief Determines whether we have exceeded the maximum 4787 /// recursive template instantiations. 4788 operator bool() const { return Invalid; } 4789 4790 private: 4791 Sema &SemaRef; 4792 bool Invalid; 4793 bool SavedInNonInstantiationSFINAEContext; 4794 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4795 SourceRange InstantiationRange); 4796 4797 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4798 4799 InstantiatingTemplate& 4800 operator=(const InstantiatingTemplate&); // not implemented 4801 }; 4802 4803 void PrintInstantiationStack(); 4804 4805 /// \brief Determines whether we are currently in a context where 4806 /// template argument substitution failures are not considered 4807 /// errors. 4808 /// 4809 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4810 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4811 /// template-deduction context object, which can be used to capture 4812 /// diagnostics that will be suppressed. 4813 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4814 4815 /// \brief RAII class used to determine whether SFINAE has 4816 /// trapped any errors that occur during template argument 4817 /// deduction.` 4818 class SFINAETrap { 4819 Sema &SemaRef; 4820 unsigned PrevSFINAEErrors; 4821 bool PrevInNonInstantiationSFINAEContext; 4822 bool PrevAccessCheckingSFINAE; 4823 4824 public: 4825 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 4826 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 4827 PrevInNonInstantiationSFINAEContext( 4828 SemaRef.InNonInstantiationSFINAEContext), 4829 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 4830 { 4831 if (!SemaRef.isSFINAEContext()) 4832 SemaRef.InNonInstantiationSFINAEContext = true; 4833 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 4834 } 4835 4836 ~SFINAETrap() { 4837 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 4838 SemaRef.InNonInstantiationSFINAEContext 4839 = PrevInNonInstantiationSFINAEContext; 4840 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 4841 } 4842 4843 /// \brief Determine whether any SFINAE errors have been trapped. 4844 bool hasErrorOccurred() const { 4845 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 4846 } 4847 }; 4848 4849 /// \brief The current instantiation scope used to store local 4850 /// variables. 4851 LocalInstantiationScope *CurrentInstantiationScope; 4852 4853 /// \brief The number of typos corrected by CorrectTypo. 4854 unsigned TyposCorrected; 4855 4856 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 4857 UnqualifiedTyposCorrectedMap; 4858 4859 /// \brief A cache containing the results of typo correction for unqualified 4860 /// name lookup. 4861 /// 4862 /// The string is the string that we corrected to (which may be empty, if 4863 /// there was no correction), while the boolean will be true when the 4864 /// string represents a keyword. 4865 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 4866 4867 /// \brief Worker object for performing CFG-based warnings. 4868 sema::AnalysisBasedWarnings AnalysisWarnings; 4869 4870 /// \brief An entity for which implicit template instantiation is required. 4871 /// 4872 /// The source location associated with the declaration is the first place in 4873 /// the source code where the declaration was "used". It is not necessarily 4874 /// the point of instantiation (which will be either before or after the 4875 /// namespace-scope declaration that triggered this implicit instantiation), 4876 /// However, it is the location that diagnostics should generally refer to, 4877 /// because users will need to know what code triggered the instantiation. 4878 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 4879 4880 /// \brief The queue of implicit template instantiations that are required 4881 /// but have not yet been performed. 4882 std::deque<PendingImplicitInstantiation> PendingInstantiations; 4883 4884 /// \brief The queue of implicit template instantiations that are required 4885 /// and must be performed within the current local scope. 4886 /// 4887 /// This queue is only used for member functions of local classes in 4888 /// templates, which must be instantiated in the same scope as their 4889 /// enclosing function, so that they can reference function-local 4890 /// types, static variables, enumerators, etc. 4891 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 4892 4893 void PerformPendingInstantiations(bool LocalOnly = false); 4894 4895 TypeSourceInfo *SubstType(TypeSourceInfo *T, 4896 const MultiLevelTemplateArgumentList &TemplateArgs, 4897 SourceLocation Loc, DeclarationName Entity); 4898 4899 QualType SubstType(QualType T, 4900 const MultiLevelTemplateArgumentList &TemplateArgs, 4901 SourceLocation Loc, DeclarationName Entity); 4902 4903 TypeSourceInfo *SubstType(TypeLoc TL, 4904 const MultiLevelTemplateArgumentList &TemplateArgs, 4905 SourceLocation Loc, DeclarationName Entity); 4906 4907 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 4908 const MultiLevelTemplateArgumentList &TemplateArgs, 4909 SourceLocation Loc, 4910 DeclarationName Entity); 4911 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 4912 const MultiLevelTemplateArgumentList &TemplateArgs, 4913 int indexAdjustment, 4914 llvm::Optional<unsigned> NumExpansions); 4915 bool SubstParmTypes(SourceLocation Loc, 4916 ParmVarDecl **Params, unsigned NumParams, 4917 const MultiLevelTemplateArgumentList &TemplateArgs, 4918 SmallVectorImpl<QualType> &ParamTypes, 4919 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 4920 ExprResult SubstExpr(Expr *E, 4921 const MultiLevelTemplateArgumentList &TemplateArgs); 4922 4923 /// \brief Substitute the given template arguments into a list of 4924 /// expressions, expanding pack expansions if required. 4925 /// 4926 /// \param Exprs The list of expressions to substitute into. 4927 /// 4928 /// \param NumExprs The number of expressions in \p Exprs. 4929 /// 4930 /// \param IsCall Whether this is some form of call, in which case 4931 /// default arguments will be dropped. 4932 /// 4933 /// \param TemplateArgs The set of template arguments to substitute. 4934 /// 4935 /// \param Outputs Will receive all of the substituted arguments. 4936 /// 4937 /// \returns true if an error occurred, false otherwise. 4938 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 4939 const MultiLevelTemplateArgumentList &TemplateArgs, 4940 SmallVectorImpl<Expr *> &Outputs); 4941 4942 StmtResult SubstStmt(Stmt *S, 4943 const MultiLevelTemplateArgumentList &TemplateArgs); 4944 4945 Decl *SubstDecl(Decl *D, DeclContext *Owner, 4946 const MultiLevelTemplateArgumentList &TemplateArgs); 4947 4948 bool 4949 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 4950 CXXRecordDecl *Pattern, 4951 const MultiLevelTemplateArgumentList &TemplateArgs); 4952 4953 bool 4954 InstantiateClass(SourceLocation PointOfInstantiation, 4955 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 4956 const MultiLevelTemplateArgumentList &TemplateArgs, 4957 TemplateSpecializationKind TSK, 4958 bool Complain = true); 4959 4960 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 4961 const Decl *Pattern, Decl *Inst); 4962 4963 bool 4964 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 4965 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4966 TemplateSpecializationKind TSK, 4967 bool Complain = true); 4968 4969 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 4970 CXXRecordDecl *Instantiation, 4971 const MultiLevelTemplateArgumentList &TemplateArgs, 4972 TemplateSpecializationKind TSK); 4973 4974 void InstantiateClassTemplateSpecializationMembers( 4975 SourceLocation PointOfInstantiation, 4976 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4977 TemplateSpecializationKind TSK); 4978 4979 NestedNameSpecifierLoc 4980 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 4981 const MultiLevelTemplateArgumentList &TemplateArgs); 4982 4983 DeclarationNameInfo 4984 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 4985 const MultiLevelTemplateArgumentList &TemplateArgs); 4986 TemplateName 4987 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 4988 SourceLocation Loc, 4989 const MultiLevelTemplateArgumentList &TemplateArgs); 4990 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 4991 TemplateArgumentListInfo &Result, 4992 const MultiLevelTemplateArgumentList &TemplateArgs); 4993 4994 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 4995 FunctionDecl *Function, 4996 bool Recursive = false, 4997 bool DefinitionRequired = false); 4998 void InstantiateStaticDataMemberDefinition( 4999 SourceLocation PointOfInstantiation, 5000 VarDecl *Var, 5001 bool Recursive = false, 5002 bool DefinitionRequired = false); 5003 5004 void InstantiateMemInitializers(CXXConstructorDecl *New, 5005 const CXXConstructorDecl *Tmpl, 5006 const MultiLevelTemplateArgumentList &TemplateArgs); 5007 bool InstantiateInitializer(Expr *Init, 5008 const MultiLevelTemplateArgumentList &TemplateArgs, 5009 SourceLocation &LParenLoc, 5010 ASTOwningVector<Expr*> &NewArgs, 5011 SourceLocation &RParenLoc); 5012 5013 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 5014 const MultiLevelTemplateArgumentList &TemplateArgs); 5015 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 5016 const MultiLevelTemplateArgumentList &TemplateArgs); 5017 5018 // Objective-C declarations. 5019 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 5020 IdentifierInfo *ClassName, 5021 SourceLocation ClassLoc, 5022 IdentifierInfo *SuperName, 5023 SourceLocation SuperLoc, 5024 Decl * const *ProtoRefs, 5025 unsigned NumProtoRefs, 5026 const SourceLocation *ProtoLocs, 5027 SourceLocation EndProtoLoc, 5028 AttributeList *AttrList); 5029 5030 Decl *ActOnCompatiblityAlias( 5031 SourceLocation AtCompatibilityAliasLoc, 5032 IdentifierInfo *AliasName, SourceLocation AliasLocation, 5033 IdentifierInfo *ClassName, SourceLocation ClassLocation); 5034 5035 bool CheckForwardProtocolDeclarationForCircularDependency( 5036 IdentifierInfo *PName, 5037 SourceLocation &PLoc, SourceLocation PrevLoc, 5038 const ObjCList<ObjCProtocolDecl> &PList); 5039 5040 Decl *ActOnStartProtocolInterface( 5041 SourceLocation AtProtoInterfaceLoc, 5042 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 5043 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 5044 const SourceLocation *ProtoLocs, 5045 SourceLocation EndProtoLoc, 5046 AttributeList *AttrList); 5047 5048 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 5049 IdentifierInfo *ClassName, 5050 SourceLocation ClassLoc, 5051 IdentifierInfo *CategoryName, 5052 SourceLocation CategoryLoc, 5053 Decl * const *ProtoRefs, 5054 unsigned NumProtoRefs, 5055 const SourceLocation *ProtoLocs, 5056 SourceLocation EndProtoLoc); 5057 5058 Decl *ActOnStartClassImplementation( 5059 SourceLocation AtClassImplLoc, 5060 IdentifierInfo *ClassName, SourceLocation ClassLoc, 5061 IdentifierInfo *SuperClassname, 5062 SourceLocation SuperClassLoc); 5063 5064 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 5065 IdentifierInfo *ClassName, 5066 SourceLocation ClassLoc, 5067 IdentifierInfo *CatName, 5068 SourceLocation CatLoc); 5069 5070 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc, 5071 IdentifierInfo **IdentList, 5072 SourceLocation *IdentLocs, 5073 unsigned NumElts); 5074 5075 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 5076 const IdentifierLocPair *IdentList, 5077 unsigned NumElts, 5078 AttributeList *attrList); 5079 5080 void FindProtocolDeclaration(bool WarnOnDeclarations, 5081 const IdentifierLocPair *ProtocolId, 5082 unsigned NumProtocols, 5083 SmallVectorImpl<Decl *> &Protocols); 5084 5085 /// Ensure attributes are consistent with type. 5086 /// \param [in, out] Attributes The attributes to check; they will 5087 /// be modified to be consistent with \arg PropertyTy. 5088 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5089 SourceLocation Loc, 5090 unsigned &Attributes); 5091 5092 /// Process the specified property declaration and create decls for the 5093 /// setters and getters as needed. 5094 /// \param property The property declaration being processed 5095 /// \param DC The semantic container for the property 5096 /// \param redeclaredProperty Declaration for property if redeclared 5097 /// in class extension. 5098 /// \param lexicalDC Container for redeclaredProperty. 5099 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5100 ObjCContainerDecl *DC, 5101 ObjCPropertyDecl *redeclaredProperty = 0, 5102 ObjCContainerDecl *lexicalDC = 0); 5103 5104 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5105 ObjCPropertyDecl *SuperProperty, 5106 const IdentifierInfo *Name); 5107 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5108 5109 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5110 ObjCMethodDecl *MethodDecl, 5111 bool IsInstance); 5112 5113 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5114 5115 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5116 ObjCInterfaceDecl *ID); 5117 5118 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5119 ObjCProtocolDecl *PDecl); 5120 5121 void ActOnAtEnd(Scope *S, SourceRange AtEnd, 5122 Decl **allMethods = 0, unsigned allNum = 0, 5123 Decl **allProperties = 0, unsigned pNum = 0, 5124 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5125 5126 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5127 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5128 Selector GetterSel, Selector SetterSel, 5129 bool *OverridingProperty, 5130 tok::ObjCKeywordKind MethodImplKind, 5131 DeclContext *lexicalDC = 0); 5132 5133 Decl *ActOnPropertyImplDecl(Scope *S, 5134 SourceLocation AtLoc, 5135 SourceLocation PropertyLoc, 5136 bool ImplKind, 5137 IdentifierInfo *PropertyId, 5138 IdentifierInfo *PropertyIvar, 5139 SourceLocation PropertyIvarLoc); 5140 5141 enum ObjCSpecialMethodKind { 5142 OSMK_None, 5143 OSMK_Alloc, 5144 OSMK_New, 5145 OSMK_Copy, 5146 OSMK_RetainingInit, 5147 OSMK_NonRetainingInit 5148 }; 5149 5150 struct ObjCArgInfo { 5151 IdentifierInfo *Name; 5152 SourceLocation NameLoc; 5153 // The Type is null if no type was specified, and the DeclSpec is invalid 5154 // in this case. 5155 ParsedType Type; 5156 ObjCDeclSpec DeclSpec; 5157 5158 /// ArgAttrs - Attribute list for this argument. 5159 AttributeList *ArgAttrs; 5160 }; 5161 5162 Decl *ActOnMethodDeclaration( 5163 Scope *S, 5164 SourceLocation BeginLoc, // location of the + or -. 5165 SourceLocation EndLoc, // location of the ; or {. 5166 tok::TokenKind MethodType, 5167 ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5168 SourceLocation SelectorStartLoc, Selector Sel, 5169 // optional arguments. The number of types/arguments is obtained 5170 // from the Sel.getNumArgs(). 5171 ObjCArgInfo *ArgInfo, 5172 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5173 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5174 bool isVariadic, bool MethodDefinition); 5175 5176 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5177 // Will search "local" class/category implementations for a method decl. 5178 // Will also search in class's root looking for instance method. 5179 // Returns 0 if no method is found. 5180 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5181 ObjCInterfaceDecl *CDecl); 5182 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5183 ObjCInterfaceDecl *ClassDecl); 5184 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5185 const ObjCObjectPointerType *OPT, 5186 bool IsInstance); 5187 5188 bool inferObjCARCLifetime(ValueDecl *decl); 5189 5190 ExprResult 5191 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5192 Expr *BaseExpr, 5193 SourceLocation OpLoc, 5194 DeclarationName MemberName, 5195 SourceLocation MemberLoc, 5196 SourceLocation SuperLoc, QualType SuperType, 5197 bool Super); 5198 5199 ExprResult 5200 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5201 IdentifierInfo &propertyName, 5202 SourceLocation receiverNameLoc, 5203 SourceLocation propertyNameLoc); 5204 5205 ObjCMethodDecl *tryCaptureObjCSelf(); 5206 5207 /// \brief Describes the kind of message expression indicated by a message 5208 /// send that starts with an identifier. 5209 enum ObjCMessageKind { 5210 /// \brief The message is sent to 'super'. 5211 ObjCSuperMessage, 5212 /// \brief The message is an instance message. 5213 ObjCInstanceMessage, 5214 /// \brief The message is a class message, and the identifier is a type 5215 /// name. 5216 ObjCClassMessage 5217 }; 5218 5219 ObjCMessageKind getObjCMessageKind(Scope *S, 5220 IdentifierInfo *Name, 5221 SourceLocation NameLoc, 5222 bool IsSuper, 5223 bool HasTrailingDot, 5224 ParsedType &ReceiverType); 5225 5226 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5227 Selector Sel, 5228 SourceLocation LBracLoc, 5229 SourceLocation SelectorLoc, 5230 SourceLocation RBracLoc, 5231 MultiExprArg Args); 5232 5233 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5234 QualType ReceiverType, 5235 SourceLocation SuperLoc, 5236 Selector Sel, 5237 ObjCMethodDecl *Method, 5238 SourceLocation LBracLoc, 5239 SourceLocation SelectorLoc, 5240 SourceLocation RBracLoc, 5241 MultiExprArg Args); 5242 5243 ExprResult ActOnClassMessage(Scope *S, 5244 ParsedType Receiver, 5245 Selector Sel, 5246 SourceLocation LBracLoc, 5247 SourceLocation SelectorLoc, 5248 SourceLocation RBracLoc, 5249 MultiExprArg Args); 5250 5251 ExprResult BuildInstanceMessage(Expr *Receiver, 5252 QualType ReceiverType, 5253 SourceLocation SuperLoc, 5254 Selector Sel, 5255 ObjCMethodDecl *Method, 5256 SourceLocation LBracLoc, 5257 SourceLocation SelectorLoc, 5258 SourceLocation RBracLoc, 5259 MultiExprArg Args); 5260 5261 ExprResult ActOnInstanceMessage(Scope *S, 5262 Expr *Receiver, 5263 Selector Sel, 5264 SourceLocation LBracLoc, 5265 SourceLocation SelectorLoc, 5266 SourceLocation RBracLoc, 5267 MultiExprArg Args); 5268 5269 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5270 ObjCBridgeCastKind Kind, 5271 SourceLocation BridgeKeywordLoc, 5272 TypeSourceInfo *TSInfo, 5273 Expr *SubExpr); 5274 5275 ExprResult ActOnObjCBridgedCast(Scope *S, 5276 SourceLocation LParenLoc, 5277 ObjCBridgeCastKind Kind, 5278 SourceLocation BridgeKeywordLoc, 5279 ParsedType Type, 5280 SourceLocation RParenLoc, 5281 Expr *SubExpr); 5282 5283 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5284 5285 /// \brief Check whether the given new method is a valid override of the 5286 /// given overridden method, and set any properties that should be inherited. 5287 /// 5288 /// \returns True if an error occurred. 5289 bool CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5290 const ObjCMethodDecl *Overridden, 5291 bool IsImplementation); 5292 5293 /// \brief Check whether the given method overrides any methods in its class, 5294 /// calling \c CheckObjCMethodOverride for each overridden method. 5295 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5296 5297 enum PragmaOptionsAlignKind { 5298 POAK_Native, // #pragma options align=native 5299 POAK_Natural, // #pragma options align=natural 5300 POAK_Packed, // #pragma options align=packed 5301 POAK_Power, // #pragma options align=power 5302 POAK_Mac68k, // #pragma options align=mac68k 5303 POAK_Reset // #pragma options align=reset 5304 }; 5305 5306 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5307 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5308 SourceLocation PragmaLoc, 5309 SourceLocation KindLoc); 5310 5311 enum PragmaPackKind { 5312 PPK_Default, // #pragma pack([n]) 5313 PPK_Show, // #pragma pack(show), only supported by MSVC. 5314 PPK_Push, // #pragma pack(push, [identifier], [n]) 5315 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5316 }; 5317 5318 enum PragmaMSStructKind { 5319 PMSST_OFF, // #pragms ms_struct off 5320 PMSST_ON // #pragms ms_struct on 5321 }; 5322 5323 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5324 void ActOnPragmaPack(PragmaPackKind Kind, 5325 IdentifierInfo *Name, 5326 Expr *Alignment, 5327 SourceLocation PragmaLoc, 5328 SourceLocation LParenLoc, 5329 SourceLocation RParenLoc); 5330 5331 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5332 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5333 5334 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5335 void ActOnPragmaUnused(const Token &Identifier, 5336 Scope *curScope, 5337 SourceLocation PragmaLoc); 5338 5339 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5340 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 5341 SourceLocation PragmaLoc); 5342 5343 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II, 5344 SourceLocation Loc); 5345 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5346 5347 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5348 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5349 SourceLocation PragmaLoc, 5350 SourceLocation WeakNameLoc); 5351 5352 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5353 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5354 IdentifierInfo* AliasName, 5355 SourceLocation PragmaLoc, 5356 SourceLocation WeakNameLoc, 5357 SourceLocation AliasNameLoc); 5358 5359 /// ActOnPragmaFPContract - Called on well formed 5360 /// #pragma {STDC,OPENCL} FP_CONTRACT 5361 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5362 5363 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5364 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5365 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5366 5367 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5368 void AddMsStructLayoutForRecord(RecordDecl *RD); 5369 5370 /// FreePackedContext - Deallocate and null out PackContext. 5371 void FreePackedContext(); 5372 5373 /// PushNamespaceVisibilityAttr - Note that we've entered a 5374 /// namespace with a visibility attribute. 5375 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 5376 5377 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5378 /// add an appropriate visibility attribute. 5379 void AddPushedVisibilityAttribute(Decl *RD); 5380 5381 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5382 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5383 void PopPragmaVisibility(); 5384 5385 /// FreeVisContext - Deallocate and null out VisContext. 5386 void FreeVisContext(); 5387 5388 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5389 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, Expr *E); 5390 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, TypeSourceInfo *T); 5391 5392 /// CastCategory - Get the correct forwarded implicit cast result category 5393 /// from the inner expression. 5394 ExprValueKind CastCategory(Expr *E); 5395 5396 /// \brief The kind of conversion being performed. 5397 enum CheckedConversionKind { 5398 /// \brief An implicit conversion. 5399 CCK_ImplicitConversion, 5400 /// \brief A C-style cast. 5401 CCK_CStyleCast, 5402 /// \brief A functional-style cast. 5403 CCK_FunctionalCast, 5404 /// \brief A cast other than a C-style cast. 5405 CCK_OtherCast 5406 }; 5407 5408 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5409 /// cast. If there is already an implicit cast, merge into the existing one. 5410 /// If isLvalue, the result of the cast is an lvalue. 5411 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5412 ExprValueKind VK = VK_RValue, 5413 const CXXCastPath *BasePath = 0, 5414 CheckedConversionKind CCK 5415 = CCK_ImplicitConversion); 5416 5417 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5418 /// to the conversion from scalar type ScalarTy to the Boolean type. 5419 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5420 5421 /// IgnoredValueConversions - Given that an expression's result is 5422 /// syntactically ignored, perform any conversions that are 5423 /// required. 5424 ExprResult IgnoredValueConversions(Expr *E); 5425 5426 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5427 // functions and arrays to their respective pointers (C99 6.3.2.1). 5428 ExprResult UsualUnaryConversions(Expr *E); 5429 5430 // DefaultFunctionArrayConversion - converts functions and arrays 5431 // to their respective pointers (C99 6.3.2.1). 5432 ExprResult DefaultFunctionArrayConversion(Expr *E); 5433 5434 // DefaultFunctionArrayLvalueConversion - converts functions and 5435 // arrays to their respective pointers and performs the 5436 // lvalue-to-rvalue conversion. 5437 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5438 5439 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5440 // the operand. This is DefaultFunctionArrayLvalueConversion, 5441 // except that it assumes the operand isn't of function or array 5442 // type. 5443 ExprResult DefaultLvalueConversion(Expr *E); 5444 5445 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5446 // do not have a prototype. Integer promotions are performed on each 5447 // argument, and arguments that have type float are promoted to double. 5448 ExprResult DefaultArgumentPromotion(Expr *E); 5449 5450 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5451 enum VariadicCallType { 5452 VariadicFunction, 5453 VariadicBlock, 5454 VariadicMethod, 5455 VariadicConstructor, 5456 VariadicDoesNotApply 5457 }; 5458 5459 /// GatherArgumentsForCall - Collector argument expressions for various 5460 /// form of call prototypes. 5461 bool GatherArgumentsForCall(SourceLocation CallLoc, 5462 FunctionDecl *FDecl, 5463 const FunctionProtoType *Proto, 5464 unsigned FirstProtoArg, 5465 Expr **Args, unsigned NumArgs, 5466 SmallVector<Expr *, 8> &AllArgs, 5467 VariadicCallType CallType = VariadicDoesNotApply); 5468 5469 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5470 // will warn if the resulting type is not a POD type. 5471 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5472 FunctionDecl *FDecl); 5473 5474 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5475 // operands and then handles various conversions that are common to binary 5476 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5477 // routine returns the first non-arithmetic type found. The client is 5478 // responsible for emitting appropriate error diagnostics. 5479 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS, 5480 bool IsCompAssign = false); 5481 5482 /// AssignConvertType - All of the 'assignment' semantic checks return this 5483 /// enum to indicate whether the assignment was allowed. These checks are 5484 /// done for simple assignments, as well as initialization, return from 5485 /// function, argument passing, etc. The query is phrased in terms of a 5486 /// source and destination type. 5487 enum AssignConvertType { 5488 /// Compatible - the types are compatible according to the standard. 5489 Compatible, 5490 5491 /// PointerToInt - The assignment converts a pointer to an int, which we 5492 /// accept as an extension. 5493 PointerToInt, 5494 5495 /// IntToPointer - The assignment converts an int to a pointer, which we 5496 /// accept as an extension. 5497 IntToPointer, 5498 5499 /// FunctionVoidPointer - The assignment is between a function pointer and 5500 /// void*, which the standard doesn't allow, but we accept as an extension. 5501 FunctionVoidPointer, 5502 5503 /// IncompatiblePointer - The assignment is between two pointers types that 5504 /// are not compatible, but we accept them as an extension. 5505 IncompatiblePointer, 5506 5507 /// IncompatiblePointer - The assignment is between two pointers types which 5508 /// point to integers which have a different sign, but are otherwise identical. 5509 /// This is a subset of the above, but broken out because it's by far the most 5510 /// common case of incompatible pointers. 5511 IncompatiblePointerSign, 5512 5513 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5514 /// c/v/r qualifiers, which we accept as an extension. 5515 CompatiblePointerDiscardsQualifiers, 5516 5517 /// IncompatiblePointerDiscardsQualifiers - The assignment 5518 /// discards qualifiers that we don't permit to be discarded, 5519 /// like address spaces. 5520 IncompatiblePointerDiscardsQualifiers, 5521 5522 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5523 /// nested pointer types, and the qualifiers other than the first two 5524 /// levels differ e.g. char ** -> const char **, but we accept them as an 5525 /// extension. 5526 IncompatibleNestedPointerQualifiers, 5527 5528 /// IncompatibleVectors - The assignment is between two vector types that 5529 /// have the same size, which we accept as an extension. 5530 IncompatibleVectors, 5531 5532 /// IntToBlockPointer - The assignment converts an int to a block 5533 /// pointer. We disallow this. 5534 IntToBlockPointer, 5535 5536 /// IncompatibleBlockPointer - The assignment is between two block 5537 /// pointers types that are not compatible. 5538 IncompatibleBlockPointer, 5539 5540 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5541 /// id type and something else (that is incompatible with it). For example, 5542 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5543 IncompatibleObjCQualifiedId, 5544 5545 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 5546 /// object with __weak qualifier. 5547 IncompatibleObjCWeakRef, 5548 5549 /// Incompatible - We reject this conversion outright, it is invalid to 5550 /// represent it in the AST. 5551 Incompatible 5552 }; 5553 5554 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5555 /// assignment conversion type specified by ConvTy. This returns true if the 5556 /// conversion was invalid or false if the conversion was accepted. 5557 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5558 SourceLocation Loc, 5559 QualType DstType, QualType SrcType, 5560 Expr *SrcExpr, AssignmentAction Action, 5561 bool *Complained = 0); 5562 5563 /// CheckAssignmentConstraints - Perform type checking for assignment, 5564 /// argument passing, variable initialization, and function return values. 5565 /// C99 6.5.16. 5566 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5567 QualType LHSType, 5568 QualType RHSType); 5569 5570 /// Check assignment constraints and prepare for a conversion of the 5571 /// RHS to the LHS type. 5572 AssignConvertType CheckAssignmentConstraints(QualType LHSType, 5573 ExprResult &RHS, 5574 CastKind &Kind); 5575 5576 // CheckSingleAssignmentConstraints - Currently used by 5577 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5578 // this routine performs the default function/array converions. 5579 AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType, 5580 ExprResult &RHS); 5581 5582 // \brief If the lhs type is a transparent union, check whether we 5583 // can initialize the transparent union with the given expression. 5584 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType, 5585 ExprResult &RHS); 5586 5587 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5588 5589 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5590 5591 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5592 AssignmentAction Action, 5593 bool AllowExplicit = false); 5594 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5595 AssignmentAction Action, 5596 bool AllowExplicit, 5597 ImplicitConversionSequence& ICS); 5598 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5599 const ImplicitConversionSequence& ICS, 5600 AssignmentAction Action, 5601 CheckedConversionKind CCK 5602 = CCK_ImplicitConversion); 5603 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5604 const StandardConversionSequence& SCS, 5605 AssignmentAction Action, 5606 CheckedConversionKind CCK); 5607 5608 /// the following "Check" methods will return a valid/converted QualType 5609 /// or a null QualType (indicating an error diagnostic was issued). 5610 5611 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5612 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS, 5613 ExprResult &RHS); 5614 QualType CheckPointerToMemberOperands( // C++ 5.5 5615 ExprResult &lex, ExprResult &rex, ExprValueKind &VK, 5616 SourceLocation OpLoc, bool isIndirect); 5617 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5618 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign, 5619 bool IsDivide); 5620 QualType CheckRemainderOperands( // C99 6.5.5 5621 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5622 bool IsCompAssign = false); 5623 QualType CheckAdditionOperands( // C99 6.5.6 5624 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5625 QualType* CompLHSTy = 0); 5626 QualType CheckSubtractionOperands( // C99 6.5.6 5627 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5628 QualType* CompLHSTy = 0); 5629 QualType CheckShiftOperands( // C99 6.5.7 5630 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 5631 bool IsCompAssign = false); 5632 QualType CheckCompareOperands( // C99 6.5.8/9 5633 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned OpaqueOpc, 5634 bool isRelational); 5635 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 5636 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5637 bool IsCompAssign = false); 5638 QualType CheckLogicalOperands( // C99 6.5.[13,14] 5639 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc); 5640 // CheckAssignmentOperands is used for both simple and compound assignment. 5641 // For simple assignment, pass both expressions and a null converted type. 5642 // For compound assignment, pass both expressions and the converted type. 5643 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 5644 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType); 5645 5646 void ConvertPropertyForLValue(ExprResult &LHS, ExprResult &RHS, 5647 QualType& LHSTy); 5648 ExprResult ConvertPropertyForRValue(Expr *E); 5649 5650 QualType CheckConditionalOperands( // C99 6.5.15 5651 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS, 5652 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc); 5653 QualType CXXCheckConditionalOperands( // C++ 5.16 5654 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5655 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5656 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 5657 bool *NonStandardCompositeType = 0); 5658 QualType FindCompositePointerType(SourceLocation Loc, ExprResult &E1, ExprResult &E2, 5659 bool *NonStandardCompositeType = 0) { 5660 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 5661 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, NonStandardCompositeType); 5662 E1 = Owned(E1Tmp); 5663 E2 = Owned(E2Tmp); 5664 return Composite; 5665 } 5666 5667 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5668 SourceLocation QuestionLoc); 5669 5670 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr, 5671 SourceLocation QuestionLoc); 5672 5673 /// type checking for vector binary operators. 5674 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS, 5675 SourceLocation Loc, bool IsCompAssign); 5676 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS, 5677 SourceLocation Loc, bool isRelational); 5678 5679 /// type checking declaration initializers (C99 6.7.8) 5680 bool CheckInitList(const InitializedEntity &Entity, 5681 InitListExpr *&InitList, QualType &DeclType); 5682 bool CheckForConstantInitializer(Expr *e, QualType t); 5683 5684 // type checking C++ declaration initializers (C++ [dcl.init]). 5685 5686 /// ReferenceCompareResult - Expresses the result of comparing two 5687 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5688 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5689 enum ReferenceCompareResult { 5690 /// Ref_Incompatible - The two types are incompatible, so direct 5691 /// reference binding is not possible. 5692 Ref_Incompatible = 0, 5693 /// Ref_Related - The two types are reference-related, which means 5694 /// that their unqualified forms (T1 and T2) are either the same 5695 /// or T1 is a base class of T2. 5696 Ref_Related, 5697 /// Ref_Compatible_With_Added_Qualification - The two types are 5698 /// reference-compatible with added qualification, meaning that 5699 /// they are reference-compatible and the qualifiers on T1 (cv1) 5700 /// are greater than the qualifiers on T2 (cv2). 5701 Ref_Compatible_With_Added_Qualification, 5702 /// Ref_Compatible - The two types are reference-compatible and 5703 /// have equivalent qualifiers (cv1 == cv2). 5704 Ref_Compatible 5705 }; 5706 5707 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 5708 QualType T1, QualType T2, 5709 bool &DerivedToBase, 5710 bool &ObjCConversion, 5711 bool &ObjCLifetimeConversion); 5712 5713 /// CheckCastTypes - Check type constraints for casting between types under 5714 /// C semantics, or forward to CXXCheckCStyleCast in C++. 5715 ExprResult CheckCastTypes(SourceLocation CastStartLoc, SourceRange TypeRange, 5716 QualType CastType, Expr *CastExpr, CastKind &Kind, 5717 ExprValueKind &VK, CXXCastPath &BasePath, 5718 bool FunctionalStyle = false); 5719 5720 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType, 5721 Expr *CastExpr, CastKind &CastKind, 5722 ExprValueKind &VK, CXXCastPath &Path); 5723 5724 // CheckVectorCast - check type constraints for vectors. 5725 // Since vectors are an extension, there are no C standard reference for this. 5726 // We allow casting between vectors and integer datatypes of the same size. 5727 // returns true if the cast is invalid 5728 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 5729 CastKind &Kind); 5730 5731 // CheckExtVectorCast - check type constraints for extended vectors. 5732 // Since vectors are an extension, there are no C standard reference for this. 5733 // We allow casting between vectors and integer datatypes of the same size, 5734 // or vectors and the element type of that vector. 5735 // returns the cast expr 5736 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr, 5737 CastKind &Kind); 5738 5739 /// CXXCheckCStyleCast - Check constraints of a C-style or function-style 5740 /// cast under C++ semantics. 5741 ExprResult CXXCheckCStyleCast(SourceRange R, QualType CastTy, ExprValueKind &VK, 5742 Expr *CastExpr, CastKind &Kind, 5743 CXXCastPath &BasePath, bool FunctionalStyle); 5744 5745 /// \brief Checks for valid expressions which can be cast to an ObjC 5746 /// pointer without needing a bridge cast. 5747 bool ValidObjCARCNoBridgeCastExpr(Expr *&Exp, QualType castType); 5748 5749 /// \brief Checks for invalid conversions and casts between 5750 /// retainable pointers and other pointer kinds. 5751 void CheckObjCARCConversion(SourceRange castRange, QualType castType, 5752 Expr *&op, CheckedConversionKind CCK); 5753 5754 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 5755 QualType ExprType); 5756 5757 /// checkRetainCycles - Check whether an Objective-C message send 5758 /// might create an obvious retain cycle. 5759 void checkRetainCycles(ObjCMessageExpr *msg); 5760 void checkRetainCycles(Expr *receiver, Expr *argument); 5761 5762 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 5763 /// to weak/__unsafe_unretained type. 5764 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 5765 5766 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 5767 /// to weak/__unsafe_unretained expression. 5768 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 5769 5770 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 5771 /// \param Method - May be null. 5772 /// \param [out] ReturnType - The return type of the send. 5773 /// \return true iff there were any incompatible types. 5774 bool CheckMessageArgumentTypes(QualType ReceiverType, 5775 Expr **Args, unsigned NumArgs, Selector Sel, 5776 ObjCMethodDecl *Method, bool isClassMessage, 5777 bool isSuperMessage, 5778 SourceLocation lbrac, SourceLocation rbrac, 5779 QualType &ReturnType, ExprValueKind &VK); 5780 5781 /// \brief Determine the result of a message send expression based on 5782 /// the type of the receiver, the method expected to receive the message, 5783 /// and the form of the message send. 5784 QualType getMessageSendResultType(QualType ReceiverType, 5785 ObjCMethodDecl *Method, 5786 bool isClassMessage, bool isSuperMessage); 5787 5788 /// \brief If the given expression involves a message send to a method 5789 /// with a related result type, emit a note describing what happened. 5790 void EmitRelatedResultTypeNote(const Expr *E); 5791 5792 /// CheckBooleanCondition - Diagnose problems involving the use of 5793 /// the given expression as a boolean condition (e.g. in an if 5794 /// statement). Also performs the standard function and array 5795 /// decays, possibly changing the input variable. 5796 /// 5797 /// \param Loc - A location associated with the condition, e.g. the 5798 /// 'if' keyword. 5799 /// \return true iff there were any errors 5800 ExprResult CheckBooleanCondition(Expr *E, SourceLocation Loc); 5801 5802 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 5803 Expr *SubExpr); 5804 5805 /// DiagnoseAssignmentAsCondition - Given that an expression is 5806 /// being used as a boolean condition, warn if it's an assignment. 5807 void DiagnoseAssignmentAsCondition(Expr *E); 5808 5809 /// \brief Redundant parentheses over an equality comparison can indicate 5810 /// that the user intended an assignment used as condition. 5811 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE); 5812 5813 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 5814 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 5815 5816 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 5817 /// the specified width and sign. If an overflow occurs, detect it and emit 5818 /// the specified diagnostic. 5819 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 5820 unsigned NewWidth, bool NewSign, 5821 SourceLocation Loc, unsigned DiagID); 5822 5823 /// Checks that the Objective-C declaration is declared in the global scope. 5824 /// Emits an error and marks the declaration as invalid if it's not declared 5825 /// in the global scope. 5826 bool CheckObjCDeclScope(Decl *D); 5827 5828 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 5829 /// and reports the appropriate diagnostics. Returns false on success. 5830 /// Can optionally return the value of the expression. 5831 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 5832 5833 /// VerifyBitField - verifies that a bit field expression is an ICE and has 5834 /// the correct width, and that the field type is valid. 5835 /// Returns false on success. 5836 /// Can optionally return whether the bit-field is of width 0 5837 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 5838 QualType FieldTy, const Expr *BitWidth, 5839 bool *ZeroWidth = 0); 5840 5841 /// \name Code completion 5842 //@{ 5843 /// \brief Describes the context in which code completion occurs. 5844 enum ParserCompletionContext { 5845 /// \brief Code completion occurs at top-level or namespace context. 5846 PCC_Namespace, 5847 /// \brief Code completion occurs within a class, struct, or union. 5848 PCC_Class, 5849 /// \brief Code completion occurs within an Objective-C interface, protocol, 5850 /// or category. 5851 PCC_ObjCInterface, 5852 /// \brief Code completion occurs within an Objective-C implementation or 5853 /// category implementation 5854 PCC_ObjCImplementation, 5855 /// \brief Code completion occurs within the list of instance variables 5856 /// in an Objective-C interface, protocol, category, or implementation. 5857 PCC_ObjCInstanceVariableList, 5858 /// \brief Code completion occurs following one or more template 5859 /// headers. 5860 PCC_Template, 5861 /// \brief Code completion occurs following one or more template 5862 /// headers within a class. 5863 PCC_MemberTemplate, 5864 /// \brief Code completion occurs within an expression. 5865 PCC_Expression, 5866 /// \brief Code completion occurs within a statement, which may 5867 /// also be an expression or a declaration. 5868 PCC_Statement, 5869 /// \brief Code completion occurs at the beginning of the 5870 /// initialization statement (or expression) in a for loop. 5871 PCC_ForInit, 5872 /// \brief Code completion occurs within the condition of an if, 5873 /// while, switch, or for statement. 5874 PCC_Condition, 5875 /// \brief Code completion occurs within the body of a function on a 5876 /// recovery path, where we do not have a specific handle on our position 5877 /// in the grammar. 5878 PCC_RecoveryInFunction, 5879 /// \brief Code completion occurs where only a type is permitted. 5880 PCC_Type, 5881 /// \brief Code completion occurs in a parenthesized expression, which 5882 /// might also be a type cast. 5883 PCC_ParenthesizedExpression, 5884 /// \brief Code completion occurs within a sequence of declaration 5885 /// specifiers within a function, method, or block. 5886 PCC_LocalDeclarationSpecifiers 5887 }; 5888 5889 void CodeCompleteOrdinaryName(Scope *S, 5890 ParserCompletionContext CompletionContext); 5891 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 5892 bool AllowNonIdentifiers, 5893 bool AllowNestedNameSpecifiers); 5894 5895 struct CodeCompleteExpressionData; 5896 void CodeCompleteExpression(Scope *S, 5897 const CodeCompleteExpressionData &Data); 5898 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 5899 SourceLocation OpLoc, 5900 bool IsArrow); 5901 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 5902 void CodeCompleteTag(Scope *S, unsigned TagSpec); 5903 void CodeCompleteTypeQualifiers(DeclSpec &DS); 5904 void CodeCompleteCase(Scope *S); 5905 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 5906 void CodeCompleteInitializer(Scope *S, Decl *D); 5907 void CodeCompleteReturn(Scope *S); 5908 void CodeCompleteAfterIf(Scope *S); 5909 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 5910 5911 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 5912 bool EnteringContext); 5913 void CodeCompleteUsing(Scope *S); 5914 void CodeCompleteUsingDirective(Scope *S); 5915 void CodeCompleteNamespaceDecl(Scope *S); 5916 void CodeCompleteNamespaceAliasDecl(Scope *S); 5917 void CodeCompleteOperatorName(Scope *S); 5918 void CodeCompleteConstructorInitializer(Decl *Constructor, 5919 CXXCtorInitializer** Initializers, 5920 unsigned NumInitializers); 5921 5922 void CodeCompleteObjCAtDirective(Scope *S); 5923 void CodeCompleteObjCAtVisibility(Scope *S); 5924 void CodeCompleteObjCAtStatement(Scope *S); 5925 void CodeCompleteObjCAtExpression(Scope *S); 5926 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 5927 void CodeCompleteObjCPropertyGetter(Scope *S); 5928 void CodeCompleteObjCPropertySetter(Scope *S); 5929 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 5930 bool IsParameter); 5931 void CodeCompleteObjCMessageReceiver(Scope *S); 5932 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 5933 IdentifierInfo **SelIdents, 5934 unsigned NumSelIdents, 5935 bool AtArgumentExpression); 5936 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 5937 IdentifierInfo **SelIdents, 5938 unsigned NumSelIdents, 5939 bool AtArgumentExpression, 5940 bool IsSuper = false); 5941 void CodeCompleteObjCInstanceMessage(Scope *S, Expr *Receiver, 5942 IdentifierInfo **SelIdents, 5943 unsigned NumSelIdents, 5944 bool AtArgumentExpression, 5945 ObjCInterfaceDecl *Super = 0); 5946 void CodeCompleteObjCForCollection(Scope *S, 5947 DeclGroupPtrTy IterationVar); 5948 void CodeCompleteObjCSelector(Scope *S, 5949 IdentifierInfo **SelIdents, 5950 unsigned NumSelIdents); 5951 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 5952 unsigned NumProtocols); 5953 void CodeCompleteObjCProtocolDecl(Scope *S); 5954 void CodeCompleteObjCInterfaceDecl(Scope *S); 5955 void CodeCompleteObjCSuperclass(Scope *S, 5956 IdentifierInfo *ClassName, 5957 SourceLocation ClassNameLoc); 5958 void CodeCompleteObjCImplementationDecl(Scope *S); 5959 void CodeCompleteObjCInterfaceCategory(Scope *S, 5960 IdentifierInfo *ClassName, 5961 SourceLocation ClassNameLoc); 5962 void CodeCompleteObjCImplementationCategory(Scope *S, 5963 IdentifierInfo *ClassName, 5964 SourceLocation ClassNameLoc); 5965 void CodeCompleteObjCPropertyDefinition(Scope *S); 5966 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 5967 IdentifierInfo *PropertyName); 5968 void CodeCompleteObjCMethodDecl(Scope *S, 5969 bool IsInstanceMethod, 5970 ParsedType ReturnType); 5971 void CodeCompleteObjCMethodDeclSelector(Scope *S, 5972 bool IsInstanceMethod, 5973 bool AtParameterName, 5974 ParsedType ReturnType, 5975 IdentifierInfo **SelIdents, 5976 unsigned NumSelIdents); 5977 void CodeCompletePreprocessorDirective(bool InConditional); 5978 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 5979 void CodeCompletePreprocessorMacroName(bool IsDefinition); 5980 void CodeCompletePreprocessorExpression(); 5981 void CodeCompletePreprocessorMacroArgument(Scope *S, 5982 IdentifierInfo *Macro, 5983 MacroInfo *MacroInfo, 5984 unsigned Argument); 5985 void CodeCompleteNaturalLanguage(); 5986 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 5987 SmallVectorImpl<CodeCompletionResult> &Results); 5988 //@} 5989 5990 //===--------------------------------------------------------------------===// 5991 // Extra semantic analysis beyond the C type system 5992 5993public: 5994 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 5995 unsigned ByteNo) const; 5996 5997private: 5998 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr, 5999 bool isSubscript=false, bool AllowOnePastEnd=true); 6000 void CheckArrayAccess(const Expr *E); 6001 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 6002 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 6003 6004 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 6005 bool CheckObjCString(Expr *Arg); 6006 6007 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6008 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6009 6010 bool SemaBuiltinVAStart(CallExpr *TheCall); 6011 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 6012 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 6013 6014public: 6015 // Used by C++ template instantiation. 6016 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 6017 6018private: 6019 bool SemaBuiltinPrefetch(CallExpr *TheCall); 6020 bool SemaBuiltinObjectSize(CallExpr *TheCall); 6021 bool SemaBuiltinLongjmp(CallExpr *TheCall); 6022 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 6023 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 6024 llvm::APSInt &Result); 6025 6026 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 6027 bool HasVAListArg, unsigned format_idx, 6028 unsigned firstDataArg, bool isPrintf); 6029 6030 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 6031 const CallExpr *TheCall, bool HasVAListArg, 6032 unsigned format_idx, unsigned firstDataArg, 6033 bool isPrintf); 6034 6035 void CheckNonNullArguments(const NonNullAttr *NonNull, 6036 const Expr * const *ExprArgs, 6037 SourceLocation CallSiteLoc); 6038 6039 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 6040 unsigned format_idx, unsigned firstDataArg, 6041 bool isPrintf); 6042 6043 /// \brief Enumeration used to describe which of the memory setting or copying 6044 /// functions is being checked by \c CheckMemaccessArguments(). 6045 enum CheckedMemoryFunction { 6046 CMF_Memset, 6047 CMF_Memcpy, 6048 CMF_Memmove, 6049 CMF_Memcmp 6050 }; 6051 6052 void CheckMemaccessArguments(const CallExpr *Call, CheckedMemoryFunction CMF, 6053 IdentifierInfo *FnName); 6054 6055 void CheckStrlcpycatArguments(const CallExpr *Call, 6056 IdentifierInfo *FnName); 6057 6058 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 6059 SourceLocation ReturnLoc); 6060 void CheckFloatComparison(SourceLocation loc, Expr* lex, Expr* rex); 6061 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 6062 6063 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 6064 Expr *Init); 6065 6066 /// \brief The parser's current scope. 6067 /// 6068 /// The parser maintains this state here. 6069 Scope *CurScope; 6070 6071protected: 6072 friend class Parser; 6073 friend class InitializationSequence; 6074 friend class ASTReader; 6075 friend class ASTWriter; 6076 6077public: 6078 /// \brief Retrieve the parser's current scope. 6079 /// 6080 /// This routine must only be used when it is certain that semantic analysis 6081 /// and the parser are in precisely the same context, which is not the case 6082 /// when, e.g., we are performing any kind of template instantiation. 6083 /// Therefore, the only safe places to use this scope are in the parser 6084 /// itself and in routines directly invoked from the parser and *never* from 6085 /// template substitution or instantiation. 6086 Scope *getCurScope() const { return CurScope; } 6087 6088 Decl *getObjCDeclContext() const; 6089}; 6090 6091/// \brief RAII object that enters a new expression evaluation context. 6092class EnterExpressionEvaluationContext { 6093 Sema &Actions; 6094 6095public: 6096 EnterExpressionEvaluationContext(Sema &Actions, 6097 Sema::ExpressionEvaluationContext NewContext) 6098 : Actions(Actions) { 6099 Actions.PushExpressionEvaluationContext(NewContext); 6100 } 6101 6102 ~EnterExpressionEvaluationContext() { 6103 Actions.PopExpressionEvaluationContext(); 6104 } 6105}; 6106 6107} // end namespace clang 6108 6109#endif 6110