Sema.h revision eee3ef177a171c06f826c331e7a9e256d01eaeb0
1//===--- Sema.h - Semantic Analysis & AST Building --------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Sema class, which performs semantic analysis and 11// builds ASTs. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef LLVM_CLANG_SEMA_SEMA_H 16#define LLVM_CLANG_SEMA_SEMA_H 17 18#include "clang/Sema/Ownership.h" 19#include "clang/Sema/AnalysisBasedWarnings.h" 20#include "clang/Sema/IdentifierResolver.h" 21#include "clang/Sema/ObjCMethodList.h" 22#include "clang/Sema/DeclSpec.h" 23#include "clang/Sema/LocInfoType.h" 24#include "clang/Sema/TypoCorrection.h" 25#include "clang/AST/Expr.h" 26#include "clang/AST/DeclarationName.h" 27#include "clang/AST/ExternalASTSource.h" 28#include "clang/AST/TypeLoc.h" 29#include "clang/Basic/Specifiers.h" 30#include "clang/Basic/TemplateKinds.h" 31#include "clang/Basic/TypeTraits.h" 32#include "clang/Basic/ExpressionTraits.h" 33#include "llvm/ADT/OwningPtr.h" 34#include "llvm/ADT/SmallPtrSet.h" 35#include "llvm/ADT/SmallVector.h" 36#include <deque> 37#include <string> 38 39namespace llvm { 40 class APSInt; 41 template <typename ValueT> struct DenseMapInfo; 42 template <typename ValueT, typename ValueInfoT> class DenseSet; 43} 44 45namespace clang { 46 class ADLResult; 47 class ASTConsumer; 48 class ASTContext; 49 class ASTMutationListener; 50 class ASTReader; 51 class ASTWriter; 52 class ArrayType; 53 class AttributeList; 54 class BlockDecl; 55 class CXXBasePath; 56 class CXXBasePaths; 57 typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 58 class CXXConstructorDecl; 59 class CXXConversionDecl; 60 class CXXDestructorDecl; 61 class CXXFieldCollector; 62 class CXXMemberCallExpr; 63 class CXXMethodDecl; 64 class CXXScopeSpec; 65 class CXXTemporary; 66 class CXXTryStmt; 67 class CallExpr; 68 class ClassTemplateDecl; 69 class ClassTemplatePartialSpecializationDecl; 70 class ClassTemplateSpecializationDecl; 71 class CodeCompleteConsumer; 72 class CodeCompletionAllocator; 73 class CodeCompletionResult; 74 class Decl; 75 class DeclAccessPair; 76 class DeclContext; 77 class DeclRefExpr; 78 class DeclaratorDecl; 79 class DeducedTemplateArgument; 80 class DependentDiagnostic; 81 class DesignatedInitExpr; 82 class Designation; 83 class EnumConstantDecl; 84 class Expr; 85 class ExtVectorType; 86 class ExternalSemaSource; 87 class FormatAttr; 88 class FriendDecl; 89 class FunctionDecl; 90 class FunctionProtoType; 91 class FunctionTemplateDecl; 92 class ImplicitConversionSequence; 93 class InitListExpr; 94 class InitializationKind; 95 class InitializationSequence; 96 class InitializedEntity; 97 class IntegerLiteral; 98 class LabelStmt; 99 class LangOptions; 100 class LocalInstantiationScope; 101 class LookupResult; 102 class MacroInfo; 103 class MultiLevelTemplateArgumentList; 104 class NamedDecl; 105 class NonNullAttr; 106 class ObjCCategoryDecl; 107 class ObjCCategoryImplDecl; 108 class ObjCCompatibleAliasDecl; 109 class ObjCContainerDecl; 110 class ObjCImplDecl; 111 class ObjCImplementationDecl; 112 class ObjCInterfaceDecl; 113 class ObjCIvarDecl; 114 template <class T> class ObjCList; 115 class ObjCMessageExpr; 116 class ObjCMethodDecl; 117 class ObjCPropertyDecl; 118 class ObjCProtocolDecl; 119 class OverloadCandidateSet; 120 class OverloadExpr; 121 class ParenListExpr; 122 class ParmVarDecl; 123 class Preprocessor; 124 class PseudoDestructorTypeStorage; 125 class QualType; 126 class StandardConversionSequence; 127 class Stmt; 128 class StringLiteral; 129 class SwitchStmt; 130 class TargetAttributesSema; 131 class TemplateArgument; 132 class TemplateArgumentList; 133 class TemplateArgumentLoc; 134 class TemplateDecl; 135 class TemplateParameterList; 136 class TemplatePartialOrderingContext; 137 class TemplateTemplateParmDecl; 138 class Token; 139 class TypeAliasDecl; 140 class TypedefDecl; 141 class TypedefNameDecl; 142 class TypeLoc; 143 class UnqualifiedId; 144 class UnresolvedLookupExpr; 145 class UnresolvedMemberExpr; 146 class UnresolvedSetImpl; 147 class UnresolvedSetIterator; 148 class UsingDecl; 149 class UsingShadowDecl; 150 class ValueDecl; 151 class VarDecl; 152 class VisibilityAttr; 153 class VisibleDeclConsumer; 154 class IndirectFieldDecl; 155 156namespace sema { 157 class AccessedEntity; 158 class BlockScopeInfo; 159 class DelayedDiagnostic; 160 class FunctionScopeInfo; 161 class TemplateDeductionInfo; 162} 163 164// FIXME: No way to easily map from TemplateTypeParmTypes to 165// TemplateTypeParmDecls, so we have this horrible PointerUnion. 166typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 167 SourceLocation> UnexpandedParameterPack; 168 169/// Sema - This implements semantic analysis and AST building for C. 170class Sema { 171 Sema(const Sema&); // DO NOT IMPLEMENT 172 void operator=(const Sema&); // DO NOT IMPLEMENT 173 mutable const TargetAttributesSema* TheTargetAttributesSema; 174public: 175 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 176 typedef OpaquePtr<TemplateName> TemplateTy; 177 typedef OpaquePtr<QualType> TypeTy; 178 typedef Attr AttrTy; 179 typedef CXXBaseSpecifier BaseTy; 180 typedef CXXCtorInitializer MemInitTy; 181 typedef Expr ExprTy; 182 typedef Stmt StmtTy; 183 typedef TemplateParameterList TemplateParamsTy; 184 typedef NestedNameSpecifier CXXScopeTy; 185 186 OpenCLOptions OpenCLFeatures; 187 FPOptions FPFeatures; 188 189 const LangOptions &LangOpts; 190 Preprocessor &PP; 191 ASTContext &Context; 192 ASTConsumer &Consumer; 193 Diagnostic &Diags; 194 SourceManager &SourceMgr; 195 196 /// \brief Flag indicating whether or not to collect detailed statistics. 197 bool CollectStats; 198 199 /// \brief Source of additional semantic information. 200 ExternalSemaSource *ExternalSource; 201 202 /// \brief Code-completion consumer. 203 CodeCompleteConsumer *CodeCompleter; 204 205 /// CurContext - This is the current declaration context of parsing. 206 DeclContext *CurContext; 207 208 /// VAListTagName - The declaration name corresponding to __va_list_tag. 209 /// This is used as part of a hack to omit that class from ADL results. 210 DeclarationName VAListTagName; 211 212 /// PackContext - Manages the stack for #pragma pack. An alignment 213 /// of 0 indicates default alignment. 214 void *PackContext; // Really a "PragmaPackStack*" 215 216 bool MSStructPragmaOn; // True when #pragma ms_struct on 217 218 /// VisContext - Manages the stack for #pragma GCC visibility. 219 void *VisContext; // Really a "PragmaVisStack*" 220 221 /// ExprNeedsCleanups - True if the current evaluation context 222 /// requires cleanups to be run at its conclusion. 223 bool ExprNeedsCleanups; 224 225 /// \brief Stack containing information about each of the nested 226 /// function, block, and method scopes that are currently active. 227 /// 228 /// This array is never empty. Clients should ignore the first 229 /// element, which is used to cache a single FunctionScopeInfo 230 /// that's used to parse every top-level function. 231 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 232 233 /// ExprTemporaries - This is the stack of temporaries that are created by 234 /// the current full expression. 235 SmallVector<CXXTemporary*, 8> ExprTemporaries; 236 237 /// ExtVectorDecls - This is a list all the extended vector types. This allows 238 /// us to associate a raw vector type with one of the ext_vector type names. 239 /// This is only necessary for issuing pretty diagnostics. 240 SmallVector<TypedefNameDecl*, 24> ExtVectorDecls; 241 242 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 243 llvm::OwningPtr<CXXFieldCollector> FieldCollector; 244 245 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 246 247 /// PureVirtualClassDiagSet - a set of class declarations which we have 248 /// emitted a list of pure virtual functions. Used to prevent emitting the 249 /// same list more than once. 250 llvm::OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 251 252 /// ParsingInitForAutoVars - a set of declarations with auto types for which 253 /// we are currently parsing the initializer. 254 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 255 256 /// \brief A mapping from external names to the most recent 257 /// locally-scoped external declaration with that name. 258 /// 259 /// This map contains external declarations introduced in local 260 /// scoped, e.g., 261 /// 262 /// \code 263 /// void f() { 264 /// void foo(int, int); 265 /// } 266 /// \endcode 267 /// 268 /// Here, the name "foo" will be associated with the declaration on 269 /// "foo" within f. This name is not visible outside of 270 /// "f". However, we still find it in two cases: 271 /// 272 /// - If we are declaring another external with the name "foo", we 273 /// can find "foo" as a previous declaration, so that the types 274 /// of this external declaration can be checked for 275 /// compatibility. 276 /// 277 /// - If we would implicitly declare "foo" (e.g., due to a call to 278 /// "foo" in C when no prototype or definition is visible), then 279 /// we find this declaration of "foo" and complain that it is 280 /// not visible. 281 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 282 283 /// \brief All the tentative definitions encountered in the TU. 284 SmallVector<VarDecl *, 2> TentativeDefinitions; 285 286 /// \brief The set of file scoped decls seen so far that have not been used 287 /// and must warn if not used. Only contains the first declaration. 288 SmallVector<const DeclaratorDecl*, 4> UnusedFileScopedDecls; 289 290 /// \brief All the delegating constructors seen so far in the file, used for 291 /// cycle detection at the end of the TU. 292 SmallVector<CXXConstructorDecl*, 4> DelegatingCtorDecls; 293 294 /// \brief All the overriding destructors seen during a class definition 295 /// (there could be multiple due to nested classes) that had their exception 296 /// spec checks delayed, plus the overridden destructor. 297 SmallVector<std::pair<const CXXDestructorDecl*, 298 const CXXDestructorDecl*>, 2> 299 DelayedDestructorExceptionSpecChecks; 300 301 /// \brief Callback to the parser to parse templated functions when needed. 302 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 303 LateTemplateParserCB *LateTemplateParser; 304 void *OpaqueParser; 305 306 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 307 LateTemplateParser = LTP; 308 OpaqueParser = P; 309 } 310 311 class DelayedDiagnostics; 312 313 class ParsingDeclState { 314 unsigned SavedStackSize; 315 friend class Sema::DelayedDiagnostics; 316 }; 317 318 class ProcessingContextState { 319 unsigned SavedParsingDepth; 320 unsigned SavedActiveStackBase; 321 friend class Sema::DelayedDiagnostics; 322 }; 323 324 /// A class which encapsulates the logic for delaying diagnostics 325 /// during parsing and other processing. 326 class DelayedDiagnostics { 327 /// \brief The stack of diagnostics that were delayed due to being 328 /// produced during the parsing of a declaration. 329 sema::DelayedDiagnostic *Stack; 330 331 /// \brief The number of objects on the delayed-diagnostics stack. 332 unsigned StackSize; 333 334 /// \brief The current capacity of the delayed-diagnostics stack. 335 unsigned StackCapacity; 336 337 /// \brief The index of the first "active" delayed diagnostic in 338 /// the stack. When parsing class definitions, we ignore active 339 /// delayed diagnostics from the surrounding context. 340 unsigned ActiveStackBase; 341 342 /// \brief The depth of the declarations we're currently parsing. 343 /// This gets saved and reset whenever we enter a class definition. 344 unsigned ParsingDepth; 345 346 public: 347 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 348 ActiveStackBase(0), ParsingDepth(0) {} 349 350 ~DelayedDiagnostics() { 351 delete[] reinterpret_cast<char*>(Stack); 352 } 353 354 /// Adds a delayed diagnostic. 355 void add(const sema::DelayedDiagnostic &diag); 356 357 /// Determines whether diagnostics should be delayed. 358 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 359 360 /// Observe that we've started parsing a declaration. Access and 361 /// deprecation diagnostics will be delayed; when the declaration 362 /// is completed, all active delayed diagnostics will be evaluated 363 /// in its context, and then active diagnostics stack will be 364 /// popped down to the saved depth. 365 ParsingDeclState pushParsingDecl() { 366 ParsingDepth++; 367 368 ParsingDeclState state; 369 state.SavedStackSize = StackSize; 370 return state; 371 } 372 373 /// Observe that we're completed parsing a declaration. 374 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 375 376 /// Observe that we've started processing a different context, the 377 /// contents of which are semantically separate from the 378 /// declarations it may lexically appear in. This sets aside the 379 /// current stack of active diagnostics and starts afresh. 380 ProcessingContextState pushContext() { 381 assert(StackSize >= ActiveStackBase); 382 383 ProcessingContextState state; 384 state.SavedParsingDepth = ParsingDepth; 385 state.SavedActiveStackBase = ActiveStackBase; 386 387 ActiveStackBase = StackSize; 388 ParsingDepth = 0; 389 390 return state; 391 } 392 393 /// Observe that we've stopped processing a context. This 394 /// restores the previous stack of active diagnostics. 395 void popContext(ProcessingContextState state) { 396 assert(ActiveStackBase == StackSize); 397 assert(ParsingDepth == 0); 398 ActiveStackBase = state.SavedActiveStackBase; 399 ParsingDepth = state.SavedParsingDepth; 400 } 401 } DelayedDiagnostics; 402 403 /// A RAII object to temporarily push a declaration context. 404 class ContextRAII { 405 private: 406 Sema &S; 407 DeclContext *SavedContext; 408 ProcessingContextState SavedContextState; 409 410 public: 411 ContextRAII(Sema &S, DeclContext *ContextToPush) 412 : S(S), SavedContext(S.CurContext), 413 SavedContextState(S.DelayedDiagnostics.pushContext()) 414 { 415 assert(ContextToPush && "pushing null context"); 416 S.CurContext = ContextToPush; 417 } 418 419 void pop() { 420 if (!SavedContext) return; 421 S.CurContext = SavedContext; 422 S.DelayedDiagnostics.popContext(SavedContextState); 423 SavedContext = 0; 424 } 425 426 ~ContextRAII() { 427 pop(); 428 } 429 }; 430 431 /// WeakUndeclaredIdentifiers - Identifiers contained in 432 /// #pragma weak before declared. rare. may alias another 433 /// identifier, declared or undeclared 434 class WeakInfo { 435 IdentifierInfo *alias; // alias (optional) 436 SourceLocation loc; // for diagnostics 437 bool used; // identifier later declared? 438 public: 439 WeakInfo() 440 : alias(0), loc(SourceLocation()), used(false) {} 441 WeakInfo(IdentifierInfo *Alias, SourceLocation Loc) 442 : alias(Alias), loc(Loc), used(false) {} 443 inline IdentifierInfo * getAlias() const { return alias; } 444 inline SourceLocation getLocation() const { return loc; } 445 void setUsed(bool Used=true) { used = Used; } 446 inline bool getUsed() { return used; } 447 bool operator==(WeakInfo RHS) const { 448 return alias == RHS.getAlias() && loc == RHS.getLocation(); 449 } 450 bool operator!=(WeakInfo RHS) const { return !(*this == RHS); } 451 }; 452 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 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 /// \brief The set of declarations that have been referenced within 486 /// a potentially evaluated expression. 487 typedef SmallVector<std::pair<SourceLocation, Decl *>, 10> 488 PotentiallyReferencedDecls; 489 490 /// \brief A set of diagnostics that may be emitted. 491 typedef SmallVector<std::pair<SourceLocation, PartialDiagnostic>, 10> 492 PotentiallyEmittedDiagnostics; 493 494 /// \brief Describes how the expressions currently being parsed are 495 /// evaluated at run-time, if at all. 496 enum ExpressionEvaluationContext { 497 /// \brief The current expression and its subexpressions occur within an 498 /// unevaluated operand (C++0x [expr]p8), such as a constant expression 499 /// or the subexpression of \c sizeof, where the type or the value of the 500 /// expression may be significant but no code will be generated to evaluate 501 /// the value of the expression at run time. 502 Unevaluated, 503 504 /// \brief The current expression is potentially evaluated at run time, 505 /// which means that code may be generated to evaluate the value of the 506 /// expression at run time. 507 PotentiallyEvaluated, 508 509 /// \brief The current expression may be potentially evaluated or it may 510 /// be unevaluated, but it is impossible to tell from the lexical context. 511 /// This evaluation context is used primary for the operand of the C++ 512 /// \c typeid expression, whose argument is potentially evaluated only when 513 /// it is an lvalue of polymorphic class type (C++ [basic.def.odr]p2). 514 PotentiallyPotentiallyEvaluated, 515 516 /// \brief The current expression is potentially evaluated, but any 517 /// declarations referenced inside that expression are only used if 518 /// in fact the current expression is used. 519 /// 520 /// This value is used when parsing default function arguments, for which 521 /// we would like to provide diagnostics (e.g., passing non-POD arguments 522 /// through varargs) but do not want to mark declarations as "referenced" 523 /// until the default argument is used. 524 PotentiallyEvaluatedIfUsed 525 }; 526 527 /// \brief Data structure used to record current or nested 528 /// expression evaluation contexts. 529 struct ExpressionEvaluationContextRecord { 530 /// \brief The expression evaluation context. 531 ExpressionEvaluationContext Context; 532 533 /// \brief Whether the enclosing context needed a cleanup. 534 bool ParentNeedsCleanups; 535 536 /// \brief The number of temporaries that were active when we 537 /// entered this expression evaluation context. 538 unsigned NumTemporaries; 539 540 /// \brief The set of declarations referenced within a 541 /// potentially potentially-evaluated context. 542 /// 543 /// When leaving a potentially potentially-evaluated context, each 544 /// of these elements will be as referenced if the corresponding 545 /// potentially potentially evaluated expression is potentially 546 /// evaluated. 547 PotentiallyReferencedDecls *PotentiallyReferenced; 548 549 /// \brief The set of diagnostics to emit should this potentially 550 /// potentially-evaluated context become evaluated. 551 PotentiallyEmittedDiagnostics *PotentiallyDiagnosed; 552 553 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 554 unsigned NumTemporaries, 555 bool ParentNeedsCleanups) 556 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups), 557 NumTemporaries(NumTemporaries), 558 PotentiallyReferenced(0), PotentiallyDiagnosed(0) { } 559 560 void addReferencedDecl(SourceLocation Loc, Decl *Decl) { 561 if (!PotentiallyReferenced) 562 PotentiallyReferenced = new PotentiallyReferencedDecls; 563 PotentiallyReferenced->push_back(std::make_pair(Loc, Decl)); 564 } 565 566 void addDiagnostic(SourceLocation Loc, const PartialDiagnostic &PD) { 567 if (!PotentiallyDiagnosed) 568 PotentiallyDiagnosed = new PotentiallyEmittedDiagnostics; 569 PotentiallyDiagnosed->push_back(std::make_pair(Loc, PD)); 570 } 571 572 void Destroy() { 573 delete PotentiallyReferenced; 574 delete PotentiallyDiagnosed; 575 PotentiallyReferenced = 0; 576 PotentiallyDiagnosed = 0; 577 } 578 }; 579 580 /// A stack of expression evaluation contexts. 581 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 582 583 /// SpecialMemberOverloadResult - The overloading result for a special member 584 /// function. 585 /// 586 /// This is basically a wrapper around PointerIntPair. The lowest bit of the 587 /// integer is used to determine whether we have a parameter qualification 588 /// match, the second-lowest is whether we had success in resolving the 589 /// overload to a unique non-deleted function. 590 /// 591 /// The ConstParamMatch bit represents whether, when looking up a copy 592 /// constructor or assignment operator, we found a potential copy 593 /// constructor/assignment operator whose first parameter is const-qualified. 594 /// This is used for determining parameter types of other objects and is 595 /// utterly meaningless on other types of special members. 596 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 597 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 598 public: 599 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 600 : FastFoldingSetNode(ID) 601 {} 602 603 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 604 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 605 606 bool hasSuccess() const { return Pair.getInt() & 0x1; } 607 void setSuccess(bool B) { 608 Pair.setInt(unsigned(B) | hasConstParamMatch() << 1); 609 } 610 611 bool hasConstParamMatch() const { return Pair.getInt() & 0x2; } 612 void setConstParamMatch(bool B) { 613 Pair.setInt(B << 1 | unsigned(hasSuccess())); 614 } 615 }; 616 617 /// \brief A cache of special member function overload resolution results 618 /// for C++ records. 619 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 620 621 /// \brief Whether the code handled by Sema should be considered a 622 /// complete translation unit or not. 623 /// 624 /// When true (which is generally the case), Sema will perform 625 /// end-of-translation-unit semantic tasks (such as creating 626 /// initializers for tentative definitions in C) once parsing has 627 /// completed. This flag will be false when building PCH files, 628 /// since a PCH file is by definition not a complete translation 629 /// unit. 630 bool CompleteTranslationUnit; 631 632 llvm::BumpPtrAllocator BumpAlloc; 633 634 /// \brief The number of SFINAE diagnostics that have been trapped. 635 unsigned NumSFINAEErrors; 636 637 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> > 638 UnparsedDefaultArgInstantiationsMap; 639 640 /// \brief A mapping from parameters with unparsed default arguments to the 641 /// set of instantiations of each parameter. 642 /// 643 /// This mapping is a temporary data structure used when parsing 644 /// nested class templates or nested classes of class templates, 645 /// where we might end up instantiating an inner class before the 646 /// default arguments of its methods have been parsed. 647 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 648 649 // Contains the locations of the beginning of unparsed default 650 // argument locations. 651 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 652 653 /// UndefinedInternals - all the used, undefined objects with 654 /// internal linkage in this translation unit. 655 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 656 657 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 658 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 659 660 /// Method Pool - allows efficient lookup when typechecking messages to "id". 661 /// We need to maintain a list, since selectors can have differing signatures 662 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 663 /// of selectors are "overloaded"). 664 GlobalMethodPool MethodPool; 665 666 /// Method selectors used in a @selector expression. Used for implementation 667 /// of -Wselector. 668 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 669 670 GlobalMethodPool::iterator ReadMethodPool(Selector Sel); 671 672 /// Private Helper predicate to check for 'self'. 673 bool isSelfExpr(Expr *RExpr); 674public: 675 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 676 bool CompleteTranslationUnit = true, 677 CodeCompleteConsumer *CompletionConsumer = 0); 678 ~Sema(); 679 680 /// \brief Perform initialization that occurs after the parser has been 681 /// initialized but before it parses anything. 682 void Initialize(); 683 684 const LangOptions &getLangOptions() const { return LangOpts; } 685 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 686 FPOptions &getFPOptions() { return FPFeatures; } 687 688 Diagnostic &getDiagnostics() const { return Diags; } 689 SourceManager &getSourceManager() const { return SourceMgr; } 690 const TargetAttributesSema &getTargetAttributesSema() const; 691 Preprocessor &getPreprocessor() const { return PP; } 692 ASTContext &getASTContext() const { return Context; } 693 ASTConsumer &getASTConsumer() const { return Consumer; } 694 ASTMutationListener *getASTMutationListener() const; 695 696 void PrintStats() const; 697 698 /// \brief Helper class that creates diagnostics with optional 699 /// template instantiation stacks. 700 /// 701 /// This class provides a wrapper around the basic DiagnosticBuilder 702 /// class that emits diagnostics. SemaDiagnosticBuilder is 703 /// responsible for emitting the diagnostic (as DiagnosticBuilder 704 /// does) and, if the diagnostic comes from inside a template 705 /// instantiation, printing the template instantiation stack as 706 /// well. 707 class SemaDiagnosticBuilder : public DiagnosticBuilder { 708 Sema &SemaRef; 709 unsigned DiagID; 710 711 public: 712 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 713 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 714 715 explicit SemaDiagnosticBuilder(Sema &SemaRef) 716 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 717 718 ~SemaDiagnosticBuilder(); 719 }; 720 721 /// \brief Emit a diagnostic. 722 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 723 724 /// \brief Emit a partial diagnostic. 725 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 726 727 /// \brief Build a partial diagnostic. 728 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 729 730 bool findMacroSpelling(SourceLocation &loc, StringRef name); 731 732 ExprResult Owned(Expr* E) { return E; } 733 ExprResult Owned(ExprResult R) { return R; } 734 StmtResult Owned(Stmt* S) { return S; } 735 736 void ActOnEndOfTranslationUnit(); 737 738 void CheckDelegatingCtorCycles(); 739 740 Scope *getScopeForContext(DeclContext *Ctx); 741 742 void PushFunctionScope(); 743 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 744 void PopFunctionOrBlockScope(const sema::AnalysisBasedWarnings::Policy *WP =0, 745 const Decl *D = 0, const BlockExpr *blkExpr = 0); 746 747 sema::FunctionScopeInfo *getCurFunction() const { 748 return FunctionScopes.back(); 749 } 750 751 bool hasAnyUnrecoverableErrorsInThisFunction() const; 752 753 /// \brief Retrieve the current block, if any. 754 sema::BlockScopeInfo *getCurBlock(); 755 756 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 757 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 758 759 //===--------------------------------------------------------------------===// 760 // Type Analysis / Processing: SemaType.cpp. 761 // 762 763 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 764 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 765 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 766 } 767 QualType BuildPointerType(QualType T, 768 SourceLocation Loc, DeclarationName Entity); 769 QualType BuildReferenceType(QualType T, bool LValueRef, 770 SourceLocation Loc, DeclarationName Entity); 771 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 772 Expr *ArraySize, unsigned Quals, 773 SourceRange Brackets, DeclarationName Entity); 774 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 775 SourceLocation AttrLoc); 776 QualType BuildFunctionType(QualType T, 777 QualType *ParamTypes, unsigned NumParamTypes, 778 bool Variadic, unsigned Quals, 779 RefQualifierKind RefQualifier, 780 SourceLocation Loc, DeclarationName Entity, 781 FunctionType::ExtInfo Info); 782 QualType BuildMemberPointerType(QualType T, QualType Class, 783 SourceLocation Loc, 784 DeclarationName Entity); 785 QualType BuildBlockPointerType(QualType T, 786 SourceLocation Loc, DeclarationName Entity); 787 QualType BuildParenType(QualType T); 788 789 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); 790 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); 791 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 792 TypeSourceInfo *ReturnTypeInfo); 793 /// \brief Package the given type and TSI into a ParsedType. 794 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 795 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 796 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 797 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 798 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 799 bool CheckDistantExceptionSpec(QualType T); 800 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 801 bool CheckEquivalentExceptionSpec( 802 const FunctionProtoType *Old, SourceLocation OldLoc, 803 const FunctionProtoType *New, SourceLocation NewLoc); 804 bool CheckEquivalentExceptionSpec( 805 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 806 const FunctionProtoType *Old, SourceLocation OldLoc, 807 const FunctionProtoType *New, SourceLocation NewLoc, 808 bool *MissingExceptionSpecification = 0, 809 bool *MissingEmptyExceptionSpecification = 0, 810 bool AllowNoexceptAllMatchWithNoSpec = false, 811 bool IsOperatorNew = false); 812 bool CheckExceptionSpecSubset( 813 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 814 const FunctionProtoType *Superset, SourceLocation SuperLoc, 815 const FunctionProtoType *Subset, SourceLocation SubLoc); 816 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 817 const FunctionProtoType *Target, SourceLocation TargetLoc, 818 const FunctionProtoType *Source, SourceLocation SourceLoc); 819 820 TypeResult ActOnTypeName(Scope *S, Declarator &D); 821 822 bool RequireCompleteType(SourceLocation Loc, QualType T, 823 const PartialDiagnostic &PD, 824 std::pair<SourceLocation, PartialDiagnostic> Note); 825 bool RequireCompleteType(SourceLocation Loc, QualType T, 826 const PartialDiagnostic &PD); 827 bool RequireCompleteType(SourceLocation Loc, QualType T, 828 unsigned DiagID); 829 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 830 std::pair<SourceLocation, 831 PartialDiagnostic> Note); 832 833 834 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 835 const CXXScopeSpec &SS, QualType T); 836 837 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 838 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 839 QualType BuildUnaryTransformType(QualType BaseType, 840 UnaryTransformType::UTTKind UKind, 841 SourceLocation Loc); 842 843 //===--------------------------------------------------------------------===// 844 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 845 // 846 847 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 848 849 void DiagnoseUseOfUnimplementedSelectors(); 850 851 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 852 Scope *S, CXXScopeSpec *SS = 0, 853 bool isClassName = false, 854 bool HasTrailingDot = false, 855 ParsedType ObjectType = ParsedType(), 856 bool WantNontrivialTypeSourceInfo = false); 857 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 858 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS); 859 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 860 SourceLocation IILoc, 861 Scope *S, 862 CXXScopeSpec *SS, 863 ParsedType &SuggestedType); 864 865 /// \brief Describes the result of the name lookup and resolution performed 866 /// by \c ClassifyName(). 867 enum NameClassificationKind { 868 NC_Unknown, 869 NC_Error, 870 NC_Keyword, 871 NC_Type, 872 NC_Expression, 873 NC_NestedNameSpecifier, 874 NC_TypeTemplate, 875 NC_FunctionTemplate 876 }; 877 878 class NameClassification { 879 NameClassificationKind Kind; 880 ExprResult Expr; 881 TemplateName Template; 882 ParsedType Type; 883 const IdentifierInfo *Keyword; 884 885 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 886 887 public: 888 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 889 890 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 891 892 NameClassification(const IdentifierInfo *Keyword) 893 : Kind(NC_Keyword), Keyword(Keyword) { } 894 895 static NameClassification Error() { 896 return NameClassification(NC_Error); 897 } 898 899 static NameClassification Unknown() { 900 return NameClassification(NC_Unknown); 901 } 902 903 static NameClassification NestedNameSpecifier() { 904 return NameClassification(NC_NestedNameSpecifier); 905 } 906 907 static NameClassification TypeTemplate(TemplateName Name) { 908 NameClassification Result(NC_TypeTemplate); 909 Result.Template = Name; 910 return Result; 911 } 912 913 static NameClassification FunctionTemplate(TemplateName Name) { 914 NameClassification Result(NC_FunctionTemplate); 915 Result.Template = Name; 916 return Result; 917 } 918 919 NameClassificationKind getKind() const { return Kind; } 920 921 ParsedType getType() const { 922 assert(Kind == NC_Type); 923 return Type; 924 } 925 926 ExprResult getExpression() const { 927 assert(Kind == NC_Expression); 928 return Expr; 929 } 930 931 TemplateName getTemplateName() const { 932 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 933 return Template; 934 } 935 936 TemplateNameKind getTemplateNameKind() const { 937 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 938 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 939 } 940}; 941 942 /// \brief Perform name lookup on the given name, classifying it based on 943 /// the results of name lookup and the following token. 944 /// 945 /// This routine is used by the parser to resolve identifiers and help direct 946 /// parsing. When the identifier cannot be found, this routine will attempt 947 /// to correct the typo and classify based on the resulting name. 948 /// 949 /// \param S The scope in which we're performing name lookup. 950 /// 951 /// \param SS The nested-name-specifier that precedes the name. 952 /// 953 /// \param Name The identifier. If typo correction finds an alternative name, 954 /// this pointer parameter will be updated accordingly. 955 /// 956 /// \param NameLoc The location of the identifier. 957 /// 958 /// \param NextToken The token following the identifier. Used to help 959 /// disambiguate the name. 960 NameClassification ClassifyName(Scope *S, 961 CXXScopeSpec &SS, 962 IdentifierInfo *&Name, 963 SourceLocation NameLoc, 964 const Token &NextToken); 965 966 Decl *ActOnDeclarator(Scope *S, Declarator &D); 967 968 Decl *HandleDeclarator(Scope *S, Declarator &D, 969 MultiTemplateParamsArg TemplateParameterLists, 970 bool IsFunctionDefinition); 971 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 972 const LookupResult &Previous, 973 Scope *S); 974 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 975 void DiagnoseFunctionSpecifiers(Declarator& D); 976 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 977 void CheckShadow(Scope *S, VarDecl *D); 978 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 979 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 980 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 981 QualType R, TypeSourceInfo *TInfo, 982 LookupResult &Previous, bool &Redeclaration); 983 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 984 LookupResult &Previous, bool &Redeclaration); 985 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 986 QualType R, TypeSourceInfo *TInfo, 987 LookupResult &Previous, 988 MultiTemplateParamsArg TemplateParamLists, 989 bool &Redeclaration); 990 void CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous, 991 bool &Redeclaration); 992 void CheckCompleteVariableDeclaration(VarDecl *var); 993 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 994 QualType R, TypeSourceInfo *TInfo, 995 LookupResult &Previous, 996 MultiTemplateParamsArg TemplateParamLists, 997 bool IsFunctionDefinition, 998 bool &Redeclaration); 999 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1000 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1001 void CheckFunctionDeclaration(Scope *S, 1002 FunctionDecl *NewFD, LookupResult &Previous, 1003 bool IsExplicitSpecialization, 1004 bool &Redeclaration); 1005 void CheckMain(FunctionDecl *FD); 1006 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1007 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1008 SourceLocation Loc, 1009 QualType T); 1010 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1011 SourceLocation NameLoc, IdentifierInfo *Name, 1012 QualType T, TypeSourceInfo *TSInfo, 1013 StorageClass SC, StorageClass SCAsWritten); 1014 void ActOnParamDefaultArgument(Decl *param, 1015 SourceLocation EqualLoc, 1016 Expr *defarg); 1017 void ActOnParamUnparsedDefaultArgument(Decl *param, 1018 SourceLocation EqualLoc, 1019 SourceLocation ArgLoc); 1020 void ActOnParamDefaultArgumentError(Decl *param); 1021 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1022 SourceLocation EqualLoc); 1023 1024 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1025 bool TypeMayContainAuto); 1026 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1027 void ActOnInitializerError(Decl *Dcl); 1028 void ActOnCXXForRangeDecl(Decl *D); 1029 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1030 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1031 void FinalizeDeclaration(Decl *D); 1032 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1033 Decl **Group, 1034 unsigned NumDecls); 1035 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1036 bool TypeMayContainAuto = true); 1037 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1038 SourceLocation LocAfterDecls); 1039 void CheckForFunctionRedefinition(FunctionDecl *FD); 1040 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1041 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1042 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1043 1044 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1045 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1046 1047 /// \brief Diagnose any unused parameters in the given sequence of 1048 /// ParmVarDecl pointers. 1049 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1050 ParmVarDecl * const *End); 1051 1052 /// \brief Diagnose whether the size of parameters or return value of a 1053 /// function or obj-c method definition is pass-by-value and larger than a 1054 /// specified threshold. 1055 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1056 ParmVarDecl * const *End, 1057 QualType ReturnTy, 1058 NamedDecl *D); 1059 1060 void DiagnoseInvalidJumps(Stmt *Body); 1061 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1062 SourceLocation AsmLoc, 1063 SourceLocation RParenLoc); 1064 1065 /// Scope actions. 1066 void ActOnPopScope(SourceLocation Loc, Scope *S); 1067 void ActOnTranslationUnitScope(Scope *S); 1068 1069 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1070 DeclSpec &DS); 1071 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1072 DeclSpec &DS, 1073 MultiTemplateParamsArg TemplateParams); 1074 1075 StmtResult ActOnVlaStmt(const DeclSpec &DS); 1076 1077 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1078 AccessSpecifier AS, 1079 RecordDecl *Record); 1080 1081 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1082 RecordDecl *Record); 1083 1084 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1085 TagTypeKind NewTag, bool isDefinition, 1086 SourceLocation NewTagLoc, 1087 const IdentifierInfo &Name); 1088 1089 enum TagUseKind { 1090 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1091 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1092 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1093 TUK_Friend // Friend declaration: 'friend struct foo;' 1094 }; 1095 1096 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1097 SourceLocation KWLoc, CXXScopeSpec &SS, 1098 IdentifierInfo *Name, SourceLocation NameLoc, 1099 AttributeList *Attr, AccessSpecifier AS, 1100 MultiTemplateParamsArg TemplateParameterLists, 1101 bool &OwnedDecl, bool &IsDependent, bool ScopedEnum, 1102 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1103 1104 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1105 unsigned TagSpec, SourceLocation TagLoc, 1106 CXXScopeSpec &SS, 1107 IdentifierInfo *Name, SourceLocation NameLoc, 1108 AttributeList *Attr, 1109 MultiTemplateParamsArg TempParamLists); 1110 1111 TypeResult ActOnDependentTag(Scope *S, 1112 unsigned TagSpec, 1113 TagUseKind TUK, 1114 const CXXScopeSpec &SS, 1115 IdentifierInfo *Name, 1116 SourceLocation TagLoc, 1117 SourceLocation NameLoc); 1118 1119 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1120 IdentifierInfo *ClassName, 1121 SmallVectorImpl<Decl *> &Decls); 1122 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1123 Declarator &D, Expr *BitfieldWidth); 1124 1125 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1126 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1127 AccessSpecifier AS); 1128 1129 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1130 TypeSourceInfo *TInfo, 1131 RecordDecl *Record, SourceLocation Loc, 1132 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1133 SourceLocation TSSL, 1134 AccessSpecifier AS, NamedDecl *PrevDecl, 1135 Declarator *D = 0); 1136 1137 enum CXXSpecialMember { 1138 CXXDefaultConstructor, 1139 CXXCopyConstructor, 1140 CXXMoveConstructor, 1141 CXXCopyAssignment, 1142 CXXMoveAssignment, 1143 CXXDestructor, 1144 CXXInvalid 1145 }; 1146 bool CheckNontrivialField(FieldDecl *FD); 1147 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1148 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1149 void ActOnLastBitfield(SourceLocation DeclStart, Decl *IntfDecl, 1150 SmallVectorImpl<Decl *> &AllIvarDecls); 1151 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, Decl *IntfDecl, 1152 Declarator &D, Expr *BitfieldWidth, 1153 tok::ObjCKeywordKind visibility); 1154 1155 // This is used for both record definitions and ObjC interface declarations. 1156 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1157 Decl **Fields, unsigned NumFields, 1158 SourceLocation LBrac, SourceLocation RBrac, 1159 AttributeList *AttrList); 1160 1161 /// ActOnTagStartDefinition - Invoked when we have entered the 1162 /// scope of a tag's definition (e.g., for an enumeration, class, 1163 /// struct, or union). 1164 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1165 1166 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1167 /// C++ record definition's base-specifiers clause and are starting its 1168 /// member declarations. 1169 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1170 SourceLocation FinalLoc, 1171 SourceLocation LBraceLoc); 1172 1173 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1174 /// the definition of a tag (enumeration, class, struct, or union). 1175 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1176 SourceLocation RBraceLoc); 1177 1178 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1179 /// error parsing the definition of a tag. 1180 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1181 1182 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1183 EnumConstantDecl *LastEnumConst, 1184 SourceLocation IdLoc, 1185 IdentifierInfo *Id, 1186 Expr *val); 1187 1188 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1189 SourceLocation IdLoc, IdentifierInfo *Id, 1190 AttributeList *Attrs, 1191 SourceLocation EqualLoc, Expr *Val); 1192 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1193 SourceLocation RBraceLoc, Decl *EnumDecl, 1194 Decl **Elements, unsigned NumElements, 1195 Scope *S, AttributeList *Attr); 1196 1197 DeclContext *getContainingDC(DeclContext *DC); 1198 1199 /// Set the current declaration context until it gets popped. 1200 void PushDeclContext(Scope *S, DeclContext *DC); 1201 void PopDeclContext(); 1202 1203 /// EnterDeclaratorContext - Used when we must lookup names in the context 1204 /// of a declarator's nested name specifier. 1205 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1206 void ExitDeclaratorContext(Scope *S); 1207 1208 DeclContext *getFunctionLevelDeclContext(); 1209 1210 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1211 /// to the function decl for the function being parsed. If we're currently 1212 /// in a 'block', this returns the containing context. 1213 FunctionDecl *getCurFunctionDecl(); 1214 1215 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1216 /// the method decl for the method being parsed. If we're currently 1217 /// in a 'block', this returns the containing context. 1218 ObjCMethodDecl *getCurMethodDecl(); 1219 1220 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1221 /// or C function we're in, otherwise return null. If we're currently 1222 /// in a 'block', this returns the containing context. 1223 NamedDecl *getCurFunctionOrMethodDecl(); 1224 1225 /// Add this decl to the scope shadowed decl chains. 1226 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1227 1228 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1229 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1230 /// true if 'D' belongs to the given declaration context. 1231 /// 1232 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1233 /// whether the declaration is in scope for the purposes of explicit template 1234 /// instantiation or specialization. The default is false. 1235 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1236 bool ExplicitInstantiationOrSpecialization = false); 1237 1238 /// Finds the scope corresponding to the given decl context, if it 1239 /// happens to be an enclosing scope. Otherwise return NULL. 1240 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1241 1242 /// Subroutines of ActOnDeclarator(). 1243 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1244 TypeSourceInfo *TInfo); 1245 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1246 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1247 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1248 void mergeObjCMethodDecls(ObjCMethodDecl *New, const ObjCMethodDecl *Old); 1249 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1250 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1251 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1252 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1253 1254 // AssignmentAction - This is used by all the assignment diagnostic functions 1255 // to represent what is actually causing the operation 1256 enum AssignmentAction { 1257 AA_Assigning, 1258 AA_Passing, 1259 AA_Returning, 1260 AA_Converting, 1261 AA_Initializing, 1262 AA_Sending, 1263 AA_Casting 1264 }; 1265 1266 /// C++ Overloading. 1267 enum OverloadKind { 1268 /// This is a legitimate overload: the existing declarations are 1269 /// functions or function templates with different signatures. 1270 Ovl_Overload, 1271 1272 /// This is not an overload because the signature exactly matches 1273 /// an existing declaration. 1274 Ovl_Match, 1275 1276 /// This is not an overload because the lookup results contain a 1277 /// non-function. 1278 Ovl_NonFunction 1279 }; 1280 OverloadKind CheckOverload(Scope *S, 1281 FunctionDecl *New, 1282 const LookupResult &OldDecls, 1283 NamedDecl *&OldDecl, 1284 bool IsForUsingDecl); 1285 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1286 1287 /// \brief Checks availability of the function depending on the current 1288 /// function context.Inside an unavailable function,unavailability is ignored. 1289 /// 1290 /// \returns true if \arg FD is unavailable and current context is inside 1291 /// an available function, false otherwise. 1292 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1293 1294 ImplicitConversionSequence 1295 TryImplicitConversion(Expr *From, QualType ToType, 1296 bool SuppressUserConversions, 1297 bool AllowExplicit, 1298 bool InOverloadResolution, 1299 bool CStyle, 1300 bool AllowObjCWritebackConversion); 1301 1302 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1303 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1304 bool IsComplexPromotion(QualType FromType, QualType ToType); 1305 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1306 bool InOverloadResolution, 1307 QualType& ConvertedType, bool &IncompatibleObjC); 1308 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1309 QualType& ConvertedType, bool &IncompatibleObjC); 1310 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1311 QualType &ConvertedType); 1312 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1313 QualType& ConvertedType); 1314 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1315 const FunctionProtoType *NewType); 1316 1317 bool CheckPointerConversion(Expr *From, QualType ToType, 1318 CastKind &Kind, 1319 CXXCastPath& BasePath, 1320 bool IgnoreBaseAccess); 1321 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1322 bool InOverloadResolution, 1323 QualType &ConvertedType); 1324 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1325 CastKind &Kind, 1326 CXXCastPath &BasePath, 1327 bool IgnoreBaseAccess); 1328 bool IsQualificationConversion(QualType FromType, QualType ToType, 1329 bool CStyle, bool &ObjCLifetimeConversion); 1330 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1331 QualType &ResultTy); 1332 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1333 1334 1335 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1336 const VarDecl *NRVOCandidate, 1337 QualType ResultType, 1338 Expr *Value, 1339 bool AllowNRVO = true); 1340 1341 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1342 ExprResult Init); 1343 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1344 SourceLocation EqualLoc, 1345 ExprResult Init); 1346 ExprResult PerformObjectArgumentInitialization(Expr *From, 1347 NestedNameSpecifier *Qualifier, 1348 NamedDecl *FoundDecl, 1349 CXXMethodDecl *Method); 1350 1351 ExprResult PerformContextuallyConvertToBool(Expr *From); 1352 ExprResult PerformContextuallyConvertToObjCId(Expr *From); 1353 1354 ExprResult 1355 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1356 const PartialDiagnostic &NotIntDiag, 1357 const PartialDiagnostic &IncompleteDiag, 1358 const PartialDiagnostic &ExplicitConvDiag, 1359 const PartialDiagnostic &ExplicitConvNote, 1360 const PartialDiagnostic &AmbigDiag, 1361 const PartialDiagnostic &AmbigNote, 1362 const PartialDiagnostic &ConvDiag); 1363 1364 ExprResult PerformObjectMemberConversion(Expr *From, 1365 NestedNameSpecifier *Qualifier, 1366 NamedDecl *FoundDecl, 1367 NamedDecl *Member); 1368 1369 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1370 // TODO: make this is a typesafe union. 1371 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1372 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1373 1374 void AddOverloadCandidate(NamedDecl *Function, 1375 DeclAccessPair FoundDecl, 1376 Expr **Args, unsigned NumArgs, 1377 OverloadCandidateSet &CandidateSet); 1378 1379 void AddOverloadCandidate(FunctionDecl *Function, 1380 DeclAccessPair FoundDecl, 1381 Expr **Args, unsigned NumArgs, 1382 OverloadCandidateSet& CandidateSet, 1383 bool SuppressUserConversions = false, 1384 bool PartialOverloading = false); 1385 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1386 Expr **Args, unsigned NumArgs, 1387 OverloadCandidateSet& CandidateSet, 1388 bool SuppressUserConversions = false); 1389 void AddMethodCandidate(DeclAccessPair FoundDecl, 1390 QualType ObjectType, 1391 Expr::Classification ObjectClassification, 1392 Expr **Args, unsigned NumArgs, 1393 OverloadCandidateSet& CandidateSet, 1394 bool SuppressUserConversion = false); 1395 void AddMethodCandidate(CXXMethodDecl *Method, 1396 DeclAccessPair FoundDecl, 1397 CXXRecordDecl *ActingContext, QualType ObjectType, 1398 Expr::Classification ObjectClassification, 1399 Expr **Args, unsigned NumArgs, 1400 OverloadCandidateSet& CandidateSet, 1401 bool SuppressUserConversions = false); 1402 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1403 DeclAccessPair FoundDecl, 1404 CXXRecordDecl *ActingContext, 1405 TemplateArgumentListInfo *ExplicitTemplateArgs, 1406 QualType ObjectType, 1407 Expr::Classification ObjectClassification, 1408 Expr **Args, unsigned NumArgs, 1409 OverloadCandidateSet& CandidateSet, 1410 bool SuppressUserConversions = false); 1411 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1412 DeclAccessPair FoundDecl, 1413 TemplateArgumentListInfo *ExplicitTemplateArgs, 1414 Expr **Args, unsigned NumArgs, 1415 OverloadCandidateSet& CandidateSet, 1416 bool SuppressUserConversions = false); 1417 void AddConversionCandidate(CXXConversionDecl *Conversion, 1418 DeclAccessPair FoundDecl, 1419 CXXRecordDecl *ActingContext, 1420 Expr *From, QualType ToType, 1421 OverloadCandidateSet& CandidateSet); 1422 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1423 DeclAccessPair FoundDecl, 1424 CXXRecordDecl *ActingContext, 1425 Expr *From, QualType ToType, 1426 OverloadCandidateSet &CandidateSet); 1427 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1428 DeclAccessPair FoundDecl, 1429 CXXRecordDecl *ActingContext, 1430 const FunctionProtoType *Proto, 1431 Expr *Object, Expr **Args, unsigned NumArgs, 1432 OverloadCandidateSet& CandidateSet); 1433 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1434 SourceLocation OpLoc, 1435 Expr **Args, unsigned NumArgs, 1436 OverloadCandidateSet& CandidateSet, 1437 SourceRange OpRange = SourceRange()); 1438 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1439 Expr **Args, unsigned NumArgs, 1440 OverloadCandidateSet& CandidateSet, 1441 bool IsAssignmentOperator = false, 1442 unsigned NumContextualBoolArguments = 0); 1443 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1444 SourceLocation OpLoc, 1445 Expr **Args, unsigned NumArgs, 1446 OverloadCandidateSet& CandidateSet); 1447 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1448 bool Operator, 1449 Expr **Args, unsigned NumArgs, 1450 TemplateArgumentListInfo *ExplicitTemplateArgs, 1451 OverloadCandidateSet& CandidateSet, 1452 bool PartialOverloading = false, 1453 bool StdNamespaceIsAssociated = false); 1454 1455 // Emit as a 'note' the specific overload candidate 1456 void NoteOverloadCandidate(FunctionDecl *Fn); 1457 1458 // Emit as a series of 'note's all template and non-templates 1459 // identified by the expression Expr 1460 void NoteAllOverloadCandidates(Expr* E); 1461 1462 // [PossiblyAFunctionType] --> [Return] 1463 // NonFunctionType --> NonFunctionType 1464 // R (A) --> R(A) 1465 // R (*)(A) --> R (A) 1466 // R (&)(A) --> R (A) 1467 // R (S::*)(A) --> R (A) 1468 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1469 1470 FunctionDecl *ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, QualType TargetType, 1471 bool Complain, 1472 DeclAccessPair &Found); 1473 1474 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1475 bool Complain = false, 1476 DeclAccessPair* Found = 0); 1477 1478 ExprResult ResolveAndFixSingleFunctionTemplateSpecialization( 1479 Expr *SrcExpr, bool DoFunctionPointerConverion = false, 1480 bool Complain = false, 1481 const SourceRange& OpRangeForComplaining = SourceRange(), 1482 QualType DestTypeForComplaining = QualType(), 1483 unsigned DiagIDForComplaining = 0); 1484 1485 1486 Expr *FixOverloadedFunctionReference(Expr *E, 1487 DeclAccessPair FoundDecl, 1488 FunctionDecl *Fn); 1489 ExprResult FixOverloadedFunctionReference(ExprResult, 1490 DeclAccessPair FoundDecl, 1491 FunctionDecl *Fn); 1492 1493 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1494 Expr **Args, unsigned NumArgs, 1495 OverloadCandidateSet &CandidateSet, 1496 bool PartialOverloading = false); 1497 1498 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1499 UnresolvedLookupExpr *ULE, 1500 SourceLocation LParenLoc, 1501 Expr **Args, unsigned NumArgs, 1502 SourceLocation RParenLoc, 1503 Expr *ExecConfig); 1504 1505 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1506 unsigned Opc, 1507 const UnresolvedSetImpl &Fns, 1508 Expr *input); 1509 1510 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1511 unsigned Opc, 1512 const UnresolvedSetImpl &Fns, 1513 Expr *LHS, Expr *RHS); 1514 1515 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1516 SourceLocation RLoc, 1517 Expr *Base,Expr *Idx); 1518 1519 ExprResult 1520 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1521 SourceLocation LParenLoc, Expr **Args, 1522 unsigned NumArgs, SourceLocation RParenLoc); 1523 ExprResult 1524 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1525 Expr **Args, unsigned NumArgs, 1526 SourceLocation RParenLoc); 1527 1528 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1529 SourceLocation OpLoc); 1530 1531 /// CheckCallReturnType - Checks that a call expression's return type is 1532 /// complete. Returns true on failure. The location passed in is the location 1533 /// that best represents the call. 1534 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1535 CallExpr *CE, FunctionDecl *FD); 1536 1537 /// Helpers for dealing with blocks and functions. 1538 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1539 bool CheckParameterNames); 1540 void CheckCXXDefaultArguments(FunctionDecl *FD); 1541 void CheckExtraCXXDefaultArguments(Declarator &D); 1542 Scope *getNonFieldDeclScope(Scope *S); 1543 1544 /// \name Name lookup 1545 /// 1546 /// These routines provide name lookup that is used during semantic 1547 /// analysis to resolve the various kinds of names (identifiers, 1548 /// overloaded operator names, constructor names, etc.) into zero or 1549 /// more declarations within a particular scope. The major entry 1550 /// points are LookupName, which performs unqualified name lookup, 1551 /// and LookupQualifiedName, which performs qualified name lookup. 1552 /// 1553 /// All name lookup is performed based on some specific criteria, 1554 /// which specify what names will be visible to name lookup and how 1555 /// far name lookup should work. These criteria are important both 1556 /// for capturing language semantics (certain lookups will ignore 1557 /// certain names, for example) and for performance, since name 1558 /// lookup is often a bottleneck in the compilation of C++. Name 1559 /// lookup criteria is specified via the LookupCriteria enumeration. 1560 /// 1561 /// The results of name lookup can vary based on the kind of name 1562 /// lookup performed, the current language, and the translation 1563 /// unit. In C, for example, name lookup will either return nothing 1564 /// (no entity found) or a single declaration. In C++, name lookup 1565 /// can additionally refer to a set of overloaded functions or 1566 /// result in an ambiguity. All of the possible results of name 1567 /// lookup are captured by the LookupResult class, which provides 1568 /// the ability to distinguish among them. 1569 //@{ 1570 1571 /// @brief Describes the kind of name lookup to perform. 1572 enum LookupNameKind { 1573 /// Ordinary name lookup, which finds ordinary names (functions, 1574 /// variables, typedefs, etc.) in C and most kinds of names 1575 /// (functions, variables, members, types, etc.) in C++. 1576 LookupOrdinaryName = 0, 1577 /// Tag name lookup, which finds the names of enums, classes, 1578 /// structs, and unions. 1579 LookupTagName, 1580 /// Label name lookup. 1581 LookupLabel, 1582 /// Member name lookup, which finds the names of 1583 /// class/struct/union members. 1584 LookupMemberName, 1585 /// Look up of an operator name (e.g., operator+) for use with 1586 /// operator overloading. This lookup is similar to ordinary name 1587 /// lookup, but will ignore any declarations that are class members. 1588 LookupOperatorName, 1589 /// Look up of a name that precedes the '::' scope resolution 1590 /// operator in C++. This lookup completely ignores operator, object, 1591 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1592 LookupNestedNameSpecifierName, 1593 /// Look up a namespace name within a C++ using directive or 1594 /// namespace alias definition, ignoring non-namespace names (C++ 1595 /// [basic.lookup.udir]p1). 1596 LookupNamespaceName, 1597 /// Look up all declarations in a scope with the given name, 1598 /// including resolved using declarations. This is appropriate 1599 /// for checking redeclarations for a using declaration. 1600 LookupUsingDeclName, 1601 /// Look up an ordinary name that is going to be redeclared as a 1602 /// name with linkage. This lookup ignores any declarations that 1603 /// are outside of the current scope unless they have linkage. See 1604 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1605 LookupRedeclarationWithLinkage, 1606 /// Look up the name of an Objective-C protocol. 1607 LookupObjCProtocolName, 1608 /// Look up implicit 'self' parameter of an objective-c method. 1609 LookupObjCImplicitSelfParam, 1610 /// \brief Look up any declaration with any name. 1611 LookupAnyName 1612 }; 1613 1614 /// \brief Specifies whether (or how) name lookup is being performed for a 1615 /// redeclaration (vs. a reference). 1616 enum RedeclarationKind { 1617 /// \brief The lookup is a reference to this name that is not for the 1618 /// purpose of redeclaring the name. 1619 NotForRedeclaration = 0, 1620 /// \brief The lookup results will be used for redeclaration of a name, 1621 /// if an entity by that name already exists. 1622 ForRedeclaration 1623 }; 1624 1625private: 1626 bool CppLookupName(LookupResult &R, Scope *S); 1627 1628 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1629 CXXSpecialMember SM, 1630 bool ConstArg, 1631 bool VolatileArg, 1632 bool RValueThis, 1633 bool ConstThis, 1634 bool VolatileThis); 1635 1636 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1637 // 1638 // The boolean value will be true to indicate that the namespace was loaded 1639 // from an AST/PCH file, or false otherwise. 1640 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1641 1642 /// \brief Whether we have already loaded known namespaces from an extenal 1643 /// source. 1644 bool LoadedExternalKnownNamespaces; 1645 1646public: 1647 /// \brief Look up a name, looking for a single declaration. Return 1648 /// null if the results were absent, ambiguous, or overloaded. 1649 /// 1650 /// It is preferable to use the elaborated form and explicitly handle 1651 /// ambiguity and overloaded. 1652 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1653 SourceLocation Loc, 1654 LookupNameKind NameKind, 1655 RedeclarationKind Redecl 1656 = NotForRedeclaration); 1657 bool LookupName(LookupResult &R, Scope *S, 1658 bool AllowBuiltinCreation = false); 1659 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1660 bool InUnqualifiedLookup = false); 1661 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1662 bool AllowBuiltinCreation = false, 1663 bool EnteringContext = false); 1664 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1665 1666 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1667 QualType T1, QualType T2, 1668 UnresolvedSetImpl &Functions); 1669 1670 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1671 SourceLocation GnuLabelLoc = SourceLocation()); 1672 1673 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1674 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1675 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1676 unsigned Quals, 1677 bool *ConstParam = 0); 1678 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1679 bool RValueThis, unsigned ThisQuals, 1680 bool *ConstParam = 0); 1681 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1682 1683 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1684 Expr **Args, unsigned NumArgs, 1685 ADLResult &Functions, 1686 bool StdNamespaceIsAssociated = false); 1687 1688 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1689 VisibleDeclConsumer &Consumer, 1690 bool IncludeGlobalScope = true); 1691 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1692 VisibleDeclConsumer &Consumer, 1693 bool IncludeGlobalScope = true); 1694 1695 /// \brief The context in which typo-correction occurs. 1696 /// 1697 /// The typo-correction context affects which keywords (if any) are 1698 /// considered when trying to correct for typos. 1699 enum CorrectTypoContext { 1700 /// \brief An unknown context, where any keyword might be valid. 1701 CTC_Unknown, 1702 /// \brief A context where no keywords are used (e.g. we expect an actual 1703 /// name). 1704 CTC_NoKeywords, 1705 /// \brief A context where we're correcting a type name. 1706 CTC_Type, 1707 /// \brief An expression context. 1708 CTC_Expression, 1709 /// \brief A type cast, or anything else that can be followed by a '<'. 1710 CTC_CXXCasts, 1711 /// \brief A member lookup context. 1712 CTC_MemberLookup, 1713 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1714 CTC_ObjCIvarLookup, 1715 /// \brief An Objective-C property lookup context (e.g., self.prop). 1716 CTC_ObjCPropertyLookup, 1717 /// \brief The receiver of an Objective-C message send within an 1718 /// Objective-C method where 'super' is a valid keyword. 1719 CTC_ObjCMessageReceiver 1720 }; 1721 1722 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1723 Sema::LookupNameKind LookupKind, 1724 Scope *S, CXXScopeSpec *SS, 1725 DeclContext *MemberContext = NULL, 1726 bool EnteringContext = false, 1727 CorrectTypoContext CTC = CTC_Unknown, 1728 const ObjCObjectPointerType *OPT = NULL); 1729 1730 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1731 AssociatedNamespaceSet &AssociatedNamespaces, 1732 AssociatedClassSet &AssociatedClasses); 1733 1734 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1735 bool ConsiderLinkage, 1736 bool ExplicitInstantiationOrSpecialization); 1737 1738 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1739 //@} 1740 1741 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1742 SourceLocation IdLoc, 1743 bool TypoCorrection = false); 1744 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1745 Scope *S, bool ForRedeclaration, 1746 SourceLocation Loc); 1747 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1748 Scope *S); 1749 void AddKnownFunctionAttributes(FunctionDecl *FD); 1750 1751 // More parsing and symbol table subroutines. 1752 1753 // Decl attributes - this routine is the top level dispatcher. 1754 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1755 bool NonInheritable = true, bool Inheritable = true); 1756 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1757 bool NonInheritable = true, bool Inheritable = true); 1758 1759 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1760 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1761 bool CheckNoReturnAttr(const AttributeList &attr); 1762 1763 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1764 bool &IncompleteImpl, unsigned DiagID); 1765 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 1766 ObjCMethodDecl *MethodDecl, 1767 bool IsProtocolMethodDecl, 1768 bool IsDeclaration = false); 1769 1770 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1771 ObjCInterfaceDecl *IDecl); 1772 1773 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1774 1775 /// CheckProtocolMethodDefs - This routine checks unimplemented 1776 /// methods declared in protocol, and those referenced by it. 1777 /// \param IDecl - Used for checking for methods which may have been 1778 /// inherited. 1779 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1780 ObjCProtocolDecl *PDecl, 1781 bool& IncompleteImpl, 1782 const SelectorSet &InsMap, 1783 const SelectorSet &ClsMap, 1784 ObjCContainerDecl *CDecl); 1785 1786 /// CheckImplementationIvars - This routine checks if the instance variables 1787 /// listed in the implelementation match those listed in the interface. 1788 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1789 ObjCIvarDecl **Fields, unsigned nIvars, 1790 SourceLocation Loc); 1791 1792 /// \brief Determine whether we can synthesize a provisional ivar for the 1793 /// given name. 1794 ObjCPropertyDecl *canSynthesizeProvisionalIvar(IdentifierInfo *II); 1795 1796 /// \brief Determine whether we can synthesize a provisional ivar for the 1797 /// given property. 1798 bool canSynthesizeProvisionalIvar(ObjCPropertyDecl *Property); 1799 1800 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1801 /// remains unimplemented in the class or category @implementation. 1802 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1803 ObjCContainerDecl* IDecl, 1804 bool IncompleteImpl = false); 1805 1806 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1807 /// which must be implemented by this implementation. 1808 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1809 ObjCContainerDecl *CDecl, 1810 const SelectorSet &InsMap); 1811 1812 /// DefaultSynthesizeProperties - This routine default synthesizes all 1813 /// properties which must be synthesized in class's @implementation. 1814 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1815 ObjCInterfaceDecl *IDecl); 1816 1817 /// CollectImmediateProperties - This routine collects all properties in 1818 /// the class and its conforming protocols; but not those it its super class. 1819 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1820 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1821 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1822 1823 1824 /// LookupPropertyDecl - Looks up a property in the current class and all 1825 /// its protocols. 1826 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1827 IdentifierInfo *II); 1828 1829 /// Called by ActOnProperty to handle @property declarations in 1830 //// class extensions. 1831 Decl *HandlePropertyInClassExtension(Scope *S, 1832 ObjCCategoryDecl *CDecl, 1833 SourceLocation AtLoc, 1834 FieldDeclarator &FD, 1835 Selector GetterSel, 1836 Selector SetterSel, 1837 const bool isAssign, 1838 const bool isReadWrite, 1839 const unsigned Attributes, 1840 bool *isOverridingProperty, 1841 TypeSourceInfo *T, 1842 tok::ObjCKeywordKind MethodImplKind); 1843 1844 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1845 /// handle creating the ObjcPropertyDecl for a category or @interface. 1846 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1847 ObjCContainerDecl *CDecl, 1848 SourceLocation AtLoc, 1849 FieldDeclarator &FD, 1850 Selector GetterSel, 1851 Selector SetterSel, 1852 const bool isAssign, 1853 const bool isReadWrite, 1854 const unsigned Attributes, 1855 TypeSourceInfo *T, 1856 tok::ObjCKeywordKind MethodImplKind, 1857 DeclContext *lexicalDC = 0); 1858 1859 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1860 /// warning) when atomic property has one but not the other user-declared 1861 /// setter or getter. 1862 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1863 ObjCContainerDecl* IDecl); 1864 1865 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 1866 1867 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1868 1869 enum MethodMatchStrategy { 1870 MMS_loose, 1871 MMS_strict 1872 }; 1873 1874 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1875 /// true, or false, accordingly. 1876 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1877 const ObjCMethodDecl *PrevMethod, 1878 MethodMatchStrategy strategy = MMS_strict); 1879 1880 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1881 /// or protocol against those declared in their implementations. 1882 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1883 const SelectorSet &ClsMap, 1884 SelectorSet &InsMapSeen, 1885 SelectorSet &ClsMapSeen, 1886 ObjCImplDecl* IMPDecl, 1887 ObjCContainerDecl* IDecl, 1888 bool &IncompleteImpl, 1889 bool ImmediateClass); 1890 1891 /// MatchMethodsInClassAndItsProtocol - Check that any redeclaration of 1892 /// method in protocol in its qualified class match in their type and 1893 /// issue warnings otherwise. 1894 void MatchMethodsInClassAndItsProtocol(const ObjCInterfaceDecl *CDecl); 1895 1896private: 1897 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1898 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1899 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1900 1901 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1902 /// optionally warns if there are multiple signatures. 1903 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1904 bool receiverIdOrClass, 1905 bool warn, bool instance); 1906 1907public: 1908 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1909 /// unit are added to a global pool. This allows us to efficiently associate 1910 /// a selector with a method declaraation for purposes of typechecking 1911 /// messages sent to "id" (where the class of the object is unknown). 1912 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1913 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1914 } 1915 1916 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1917 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1918 AddMethodToGlobalPool(Method, impl, /*instance*/false); 1919 } 1920 1921 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 1922 /// there are multiple signatures. 1923 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 1924 bool receiverIdOrClass=false, 1925 bool warn=true) { 1926 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1927 warn, /*instance*/true); 1928 } 1929 1930 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 1931 /// there are multiple signatures. 1932 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 1933 bool receiverIdOrClass=false, 1934 bool warn=true) { 1935 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1936 warn, /*instance*/false); 1937 } 1938 1939 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 1940 /// implementation. 1941 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 1942 1943 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 1944 /// initialization. 1945 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 1946 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 1947 1948 //===--------------------------------------------------------------------===// 1949 // Statement Parsing Callbacks: SemaStmt.cpp. 1950public: 1951 class FullExprArg { 1952 public: 1953 FullExprArg(Sema &actions) : E(0) { } 1954 1955 // FIXME: The const_cast here is ugly. RValue references would make this 1956 // much nicer (or we could duplicate a bunch of the move semantics 1957 // emulation code from Ownership.h). 1958 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 1959 1960 ExprResult release() { 1961 return move(E); 1962 } 1963 1964 Expr *get() const { return E; } 1965 1966 Expr *operator->() { 1967 return E; 1968 } 1969 1970 private: 1971 // FIXME: No need to make the entire Sema class a friend when it's just 1972 // Sema::MakeFullExpr that needs access to the constructor below. 1973 friend class Sema; 1974 1975 explicit FullExprArg(Expr *expr) : E(expr) {} 1976 1977 Expr *E; 1978 }; 1979 1980 FullExprArg MakeFullExpr(Expr *Arg) { 1981 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 1982 } 1983 1984 StmtResult ActOnExprStmt(FullExprArg Expr); 1985 1986 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 1987 SourceLocation LeadingEmptyMacroLoc = SourceLocation()); 1988 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 1989 MultiStmtArg Elts, 1990 bool isStmtExpr); 1991 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 1992 SourceLocation StartLoc, 1993 SourceLocation EndLoc); 1994 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 1995 StmtResult ActOnForEachLValueExpr(Expr *E); 1996 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 1997 SourceLocation DotDotDotLoc, Expr *RHSVal, 1998 SourceLocation ColonLoc); 1999 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2000 2001 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2002 SourceLocation ColonLoc, 2003 Stmt *SubStmt, Scope *CurScope); 2004 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2005 SourceLocation ColonLoc, Stmt *SubStmt); 2006 2007 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2008 FullExprArg CondVal, Decl *CondVar, 2009 Stmt *ThenVal, 2010 SourceLocation ElseLoc, Stmt *ElseVal); 2011 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2012 Expr *Cond, 2013 Decl *CondVar); 2014 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2015 Stmt *Switch, Stmt *Body); 2016 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2017 FullExprArg Cond, 2018 Decl *CondVar, Stmt *Body); 2019 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2020 SourceLocation WhileLoc, 2021 SourceLocation CondLParen, Expr *Cond, 2022 SourceLocation CondRParen); 2023 2024 StmtResult ActOnForStmt(SourceLocation ForLoc, 2025 SourceLocation LParenLoc, 2026 Stmt *First, FullExprArg Second, 2027 Decl *SecondVar, 2028 FullExprArg Third, 2029 SourceLocation RParenLoc, 2030 Stmt *Body); 2031 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2032 SourceLocation LParenLoc, 2033 Stmt *First, Expr *Second, 2034 SourceLocation RParenLoc, Stmt *Body); 2035 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2036 SourceLocation LParenLoc, Stmt *LoopVar, 2037 SourceLocation ColonLoc, Expr *Collection, 2038 SourceLocation RParenLoc); 2039 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2040 SourceLocation ColonLoc, 2041 Stmt *RangeDecl, Stmt *BeginEndDecl, 2042 Expr *Cond, Expr *Inc, 2043 Stmt *LoopVarDecl, 2044 SourceLocation RParenLoc); 2045 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2046 2047 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2048 SourceLocation LabelLoc, 2049 LabelDecl *TheDecl); 2050 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2051 SourceLocation StarLoc, 2052 Expr *DestExp); 2053 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2054 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2055 2056 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2057 bool AllowFunctionParameters); 2058 2059 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2060 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2061 2062 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2063 bool IsSimple, bool IsVolatile, 2064 unsigned NumOutputs, unsigned NumInputs, 2065 IdentifierInfo **Names, 2066 MultiExprArg Constraints, 2067 MultiExprArg Exprs, 2068 Expr *AsmString, 2069 MultiExprArg Clobbers, 2070 SourceLocation RParenLoc, 2071 bool MSAsm = false); 2072 2073 2074 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2075 SourceLocation StartLoc, 2076 SourceLocation IdLoc, IdentifierInfo *Id, 2077 bool Invalid = false); 2078 2079 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2080 2081 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2082 Decl *Parm, Stmt *Body); 2083 2084 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2085 2086 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2087 MultiStmtArg Catch, Stmt *Finally); 2088 2089 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2090 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2091 Scope *CurScope); 2092 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2093 Expr *SynchExpr, 2094 Stmt *SynchBody); 2095 2096 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2097 2098 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2099 SourceLocation StartLoc, 2100 SourceLocation IdLoc, 2101 IdentifierInfo *Id); 2102 2103 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2104 2105 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2106 Decl *ExDecl, Stmt *HandlerBlock); 2107 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2108 MultiStmtArg Handlers); 2109 2110 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2111 SourceLocation TryLoc, 2112 Stmt *TryBlock, 2113 Stmt *Handler); 2114 2115 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2116 Expr *FilterExpr, 2117 Stmt *Block); 2118 2119 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2120 Stmt *Block); 2121 2122 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2123 2124 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2125 2126 /// \brief If it's a file scoped decl that must warn if not used, keep track 2127 /// of it. 2128 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2129 2130 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2131 /// whose result is unused, warn. 2132 void DiagnoseUnusedExprResult(const Stmt *S); 2133 void DiagnoseUnusedDecl(const NamedDecl *ND); 2134 2135 ParsingDeclState PushParsingDeclaration() { 2136 return DelayedDiagnostics.pushParsingDecl(); 2137 } 2138 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2139 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2140 } 2141 2142 typedef ProcessingContextState ParsingClassState; 2143 ParsingClassState PushParsingClass() { 2144 return DelayedDiagnostics.pushContext(); 2145 } 2146 void PopParsingClass(ParsingClassState state) { 2147 DelayedDiagnostics.popContext(state); 2148 } 2149 2150 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2151 SourceLocation Loc, 2152 const ObjCInterfaceDecl *UnknownObjCClass=0); 2153 2154 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2155 2156 bool makeUnavailableInSystemHeader(SourceLocation loc, 2157 StringRef message); 2158 2159 //===--------------------------------------------------------------------===// 2160 // Expression Parsing Callbacks: SemaExpr.cpp. 2161 2162 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2163 const ObjCInterfaceDecl *UnknownObjCClass=0); 2164 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2165 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2166 ObjCMethodDecl *Getter, 2167 SourceLocation Loc); 2168 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2169 Expr **Args, unsigned NumArgs); 2170 2171 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 2172 2173 void PopExpressionEvaluationContext(); 2174 2175 void DiscardCleanupsInEvaluationContext(); 2176 2177 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 2178 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2179 void MarkDeclarationsReferencedInExpr(Expr *E); 2180 2181 /// \brief Figure out if an expression could be turned into a call. 2182 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2183 UnresolvedSetImpl &NonTemplateOverloads); 2184 /// \brief Give notes for a set of overloads. 2185 void NoteOverloads(const UnresolvedSetImpl &Overloads, 2186 const SourceLocation FinalNoteLoc); 2187 2188 /// \brief Conditionally issue a diagnostic based on the current 2189 /// evaluation context. 2190 /// 2191 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2192 /// the function body is parsed, and then do a basic reachability analysis to 2193 /// determine if the statement is reachable. If it is unreachable, the 2194 /// diagnostic will not be emitted. 2195 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *stmt, 2196 const PartialDiagnostic &PD); 2197 2198 // Primary Expressions. 2199 SourceRange getExprRange(Expr *E) const; 2200 2201 ObjCIvarDecl *SynthesizeProvisionalIvar(LookupResult &Lookup, 2202 IdentifierInfo *II, 2203 SourceLocation NameLoc); 2204 2205 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Name, 2206 bool HasTrailingLParen, bool IsAddressOfOperand); 2207 2208 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2209 TemplateArgumentListInfo &Buffer, 2210 DeclarationNameInfo &NameInfo, 2211 const TemplateArgumentListInfo *&TemplateArgs); 2212 2213 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2214 CorrectTypoContext CTC = CTC_Unknown); 2215 2216 ExprResult LookupInObjCMethod(LookupResult &R, Scope *S, IdentifierInfo *II, 2217 bool AllowBuiltinCreation=false); 2218 2219 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2220 const DeclarationNameInfo &NameInfo, 2221 bool isAddressOfOperand, 2222 const TemplateArgumentListInfo *TemplateArgs); 2223 2224 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2225 ExprValueKind VK, 2226 SourceLocation Loc, 2227 const CXXScopeSpec *SS = 0); 2228 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2229 ExprValueKind VK, 2230 const DeclarationNameInfo &NameInfo, 2231 const CXXScopeSpec *SS = 0); 2232 ExprResult 2233 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2234 SourceLocation nameLoc, 2235 IndirectFieldDecl *indirectField, 2236 Expr *baseObjectExpr = 0, 2237 SourceLocation opLoc = SourceLocation()); 2238 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2239 LookupResult &R, 2240 const TemplateArgumentListInfo *TemplateArgs); 2241 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2242 LookupResult &R, 2243 const TemplateArgumentListInfo *TemplateArgs, 2244 bool IsDefiniteInstance); 2245 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2246 const LookupResult &R, 2247 bool HasTrailingLParen); 2248 2249 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2250 const DeclarationNameInfo &NameInfo); 2251 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2252 const DeclarationNameInfo &NameInfo, 2253 const TemplateArgumentListInfo *TemplateArgs); 2254 2255 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2256 LookupResult &R, 2257 bool ADL); 2258 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2259 const DeclarationNameInfo &NameInfo, 2260 NamedDecl *D); 2261 2262 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2263 ExprResult ActOnNumericConstant(const Token &); 2264 ExprResult ActOnCharacterConstant(const Token &); 2265 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *Val); 2266 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2267 SourceLocation R, 2268 MultiExprArg Val); 2269 2270 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2271 /// fragments (e.g. "foo" "bar" L"baz"). 2272 ExprResult ActOnStringLiteral(const Token *Toks, unsigned NumToks); 2273 2274 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2275 SourceLocation DefaultLoc, 2276 SourceLocation RParenLoc, 2277 Expr *ControllingExpr, 2278 MultiTypeArg Types, 2279 MultiExprArg Exprs); 2280 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2281 SourceLocation DefaultLoc, 2282 SourceLocation RParenLoc, 2283 Expr *ControllingExpr, 2284 TypeSourceInfo **Types, 2285 Expr **Exprs, 2286 unsigned NumAssocs); 2287 2288 // Binary/Unary Operators. 'Tok' is the token for the operator. 2289 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2290 Expr *InputArg); 2291 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2292 UnaryOperatorKind Opc, Expr *input); 2293 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2294 tok::TokenKind Op, Expr *Input); 2295 2296 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *T, 2297 SourceLocation OpLoc, 2298 UnaryExprOrTypeTrait ExprKind, 2299 SourceRange R); 2300 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2301 UnaryExprOrTypeTrait ExprKind); 2302 ExprResult 2303 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2304 UnaryExprOrTypeTrait ExprKind, 2305 bool isType, void *TyOrEx, 2306 const SourceRange &ArgRange); 2307 2308 ExprResult CheckPlaceholderExpr(Expr *E); 2309 bool CheckVecStepExpr(Expr *E); 2310 2311 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2312 bool CheckUnaryExprOrTypeTraitOperand(QualType type, SourceLocation OpLoc, 2313 SourceRange R, 2314 UnaryExprOrTypeTrait ExprKind); 2315 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2316 SourceLocation OpLoc, 2317 IdentifierInfo &Name, 2318 SourceLocation NameLoc, 2319 SourceLocation RParenLoc); 2320 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2321 tok::TokenKind Kind, Expr *Input); 2322 2323 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2324 Expr *Idx, SourceLocation RLoc); 2325 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2326 Expr *Idx, SourceLocation RLoc); 2327 2328 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2329 SourceLocation OpLoc, bool IsArrow, 2330 CXXScopeSpec &SS, 2331 NamedDecl *FirstQualifierInScope, 2332 const DeclarationNameInfo &NameInfo, 2333 const TemplateArgumentListInfo *TemplateArgs); 2334 2335 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2336 SourceLocation OpLoc, bool IsArrow, 2337 const CXXScopeSpec &SS, 2338 NamedDecl *FirstQualifierInScope, 2339 LookupResult &R, 2340 const TemplateArgumentListInfo *TemplateArgs, 2341 bool SuppressQualifierCheck = false); 2342 2343 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2344 bool &IsArrow, SourceLocation OpLoc, 2345 CXXScopeSpec &SS, 2346 Decl *ObjCImpDecl, 2347 bool HasTemplateArgs); 2348 2349 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2350 const CXXScopeSpec &SS, 2351 const LookupResult &R); 2352 2353 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2354 bool IsArrow, SourceLocation OpLoc, 2355 const CXXScopeSpec &SS, 2356 NamedDecl *FirstQualifierInScope, 2357 const DeclarationNameInfo &NameInfo, 2358 const TemplateArgumentListInfo *TemplateArgs); 2359 2360 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2361 SourceLocation OpLoc, 2362 tok::TokenKind OpKind, 2363 CXXScopeSpec &SS, 2364 UnqualifiedId &Member, 2365 Decl *ObjCImpDecl, 2366 bool HasTrailingLParen); 2367 2368 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2369 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2370 FunctionDecl *FDecl, 2371 const FunctionProtoType *Proto, 2372 Expr **Args, unsigned NumArgs, 2373 SourceLocation RParenLoc); 2374 2375 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2376 /// This provides the location of the left/right parens and a list of comma 2377 /// locations. 2378 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2379 MultiExprArg Args, SourceLocation RParenLoc, 2380 Expr *ExecConfig = 0); 2381 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2382 SourceLocation LParenLoc, 2383 Expr **Args, unsigned NumArgs, 2384 SourceLocation RParenLoc, 2385 Expr *ExecConfig = 0); 2386 2387 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2388 MultiExprArg ExecConfig, SourceLocation GGGLoc); 2389 2390 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2391 Declarator &D, ParsedType &Ty, 2392 SourceLocation RParenLoc, Expr *Op); 2393 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2394 TypeSourceInfo *Ty, 2395 SourceLocation RParenLoc, 2396 Expr *Op); 2397 2398 /// \brief Build an altivec or OpenCL literal. 2399 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2400 SourceLocation RParenLoc, Expr *E, 2401 TypeSourceInfo *TInfo); 2402 2403 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2404 2405 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2406 ParsedType Ty, 2407 SourceLocation RParenLoc, 2408 Expr *Op); 2409 2410 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2411 TypeSourceInfo *TInfo, 2412 SourceLocation RParenLoc, 2413 Expr *InitExpr); 2414 2415 ExprResult ActOnInitList(SourceLocation LParenLoc, 2416 MultiExprArg InitList, 2417 SourceLocation RParenLoc); 2418 2419 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2420 SourceLocation Loc, 2421 bool GNUSyntax, 2422 ExprResult Init); 2423 2424 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2425 tok::TokenKind Kind, Expr *LHS, Expr *RHS); 2426 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2427 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2428 ExprResult CreateBuiltinBinOp(SourceLocation TokLoc, 2429 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2430 2431 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2432 /// in the case of a the GNU conditional expr extension. 2433 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2434 SourceLocation ColonLoc, 2435 Expr *Cond, Expr *LHS, Expr *RHS); 2436 2437 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2438 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2439 LabelDecl *LD); 2440 2441 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2442 SourceLocation RPLoc); // "({..})" 2443 2444 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2445 struct OffsetOfComponent { 2446 SourceLocation LocStart, LocEnd; 2447 bool isBrackets; // true if [expr], false if .ident 2448 union { 2449 IdentifierInfo *IdentInfo; 2450 ExprTy *E; 2451 } U; 2452 }; 2453 2454 /// __builtin_offsetof(type, a.b[123][456].c) 2455 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2456 TypeSourceInfo *TInfo, 2457 OffsetOfComponent *CompPtr, 2458 unsigned NumComponents, 2459 SourceLocation RParenLoc); 2460 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2461 SourceLocation BuiltinLoc, 2462 SourceLocation TypeLoc, 2463 ParsedType Arg1, 2464 OffsetOfComponent *CompPtr, 2465 unsigned NumComponents, 2466 SourceLocation RParenLoc); 2467 2468 // __builtin_choose_expr(constExpr, expr1, expr2) 2469 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2470 Expr *cond, Expr *expr1, 2471 Expr *expr2, SourceLocation RPLoc); 2472 2473 // __builtin_va_arg(expr, type) 2474 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, 2475 Expr *expr, ParsedType type, 2476 SourceLocation RPLoc); 2477 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, 2478 Expr *expr, TypeSourceInfo *TInfo, 2479 SourceLocation RPLoc); 2480 2481 // __null 2482 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2483 2484 bool CheckCaseExpression(Expr *expr); 2485 2486 bool CheckMicrosoftIfExistsSymbol(CXXScopeSpec &SS, UnqualifiedId &Name); 2487 2488 //===------------------------- "Block" Extension ------------------------===// 2489 2490 /// ActOnBlockStart - This callback is invoked when a block literal is 2491 /// started. 2492 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2493 2494 /// ActOnBlockArguments - This callback allows processing of block arguments. 2495 /// If there are no arguments, this is still invoked. 2496 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2497 2498 /// ActOnBlockError - If there is an error parsing a block, this callback 2499 /// is invoked to pop the information about the block from the action impl. 2500 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2501 2502 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2503 /// literal was successfully completed. ^(int x){...} 2504 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, 2505 Stmt *Body, Scope *CurScope); 2506 2507 //===---------------------------- OpenCL Features -----------------------===// 2508 2509 /// __builtin_astype(...) 2510 ExprResult ActOnAsTypeExpr(Expr *expr, ParsedType DestTy, 2511 SourceLocation BuiltinLoc, 2512 SourceLocation RParenLoc); 2513 2514 //===---------------------------- C++ Features --------------------------===// 2515 2516 // Act on C++ namespaces 2517 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2518 SourceLocation NamespaceLoc, 2519 SourceLocation IdentLoc, 2520 IdentifierInfo *Ident, 2521 SourceLocation LBrace, 2522 AttributeList *AttrList); 2523 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2524 2525 NamespaceDecl *getStdNamespace() const; 2526 NamespaceDecl *getOrCreateStdNamespace(); 2527 2528 CXXRecordDecl *getStdBadAlloc() const; 2529 2530 Decl *ActOnUsingDirective(Scope *CurScope, 2531 SourceLocation UsingLoc, 2532 SourceLocation NamespcLoc, 2533 CXXScopeSpec &SS, 2534 SourceLocation IdentLoc, 2535 IdentifierInfo *NamespcName, 2536 AttributeList *AttrList); 2537 2538 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2539 2540 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2541 SourceLocation NamespaceLoc, 2542 SourceLocation AliasLoc, 2543 IdentifierInfo *Alias, 2544 CXXScopeSpec &SS, 2545 SourceLocation IdentLoc, 2546 IdentifierInfo *Ident); 2547 2548 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2549 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2550 const LookupResult &PreviousDecls); 2551 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2552 NamedDecl *Target); 2553 2554 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2555 bool isTypeName, 2556 const CXXScopeSpec &SS, 2557 SourceLocation NameLoc, 2558 const LookupResult &Previous); 2559 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2560 const CXXScopeSpec &SS, 2561 SourceLocation NameLoc); 2562 2563 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2564 SourceLocation UsingLoc, 2565 CXXScopeSpec &SS, 2566 const DeclarationNameInfo &NameInfo, 2567 AttributeList *AttrList, 2568 bool IsInstantiation, 2569 bool IsTypeName, 2570 SourceLocation TypenameLoc); 2571 2572 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2573 2574 Decl *ActOnUsingDeclaration(Scope *CurScope, 2575 AccessSpecifier AS, 2576 bool HasUsingKeyword, 2577 SourceLocation UsingLoc, 2578 CXXScopeSpec &SS, 2579 UnqualifiedId &Name, 2580 AttributeList *AttrList, 2581 bool IsTypeName, 2582 SourceLocation TypenameLoc); 2583 Decl *ActOnAliasDeclaration(Scope *CurScope, 2584 AccessSpecifier AS, 2585 MultiTemplateParamsArg TemplateParams, 2586 SourceLocation UsingLoc, 2587 UnqualifiedId &Name, 2588 TypeResult Type); 2589 2590 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2591 /// ActOnDeclarator, when a C++ direct initializer is present. 2592 /// e.g: "int x(1);" 2593 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2594 SourceLocation LParenLoc, 2595 MultiExprArg Exprs, 2596 SourceLocation RParenLoc, 2597 bool TypeMayContainAuto); 2598 2599 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2600 /// and sets it as the initializer for the the passed in VarDecl. 2601 bool InitializeVarWithConstructor(VarDecl *VD, 2602 CXXConstructorDecl *Constructor, 2603 MultiExprArg Exprs); 2604 2605 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2606 /// including handling of its default argument expressions. 2607 /// 2608 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2609 ExprResult 2610 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2611 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2612 bool RequiresZeroInit, unsigned ConstructKind, 2613 SourceRange ParenRange); 2614 2615 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2616 // the constructor can be elidable? 2617 ExprResult 2618 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2619 CXXConstructorDecl *Constructor, bool Elidable, 2620 MultiExprArg Exprs, bool RequiresZeroInit, 2621 unsigned ConstructKind, 2622 SourceRange ParenRange); 2623 2624 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2625 /// the default expr if needed. 2626 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2627 FunctionDecl *FD, 2628 ParmVarDecl *Param); 2629 2630 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2631 /// constructed variable. 2632 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2633 2634 /// \brief Helper class that collects exception specifications for 2635 /// implicitly-declared special member functions. 2636 class ImplicitExceptionSpecification { 2637 // Pointer to allow copying 2638 ASTContext *Context; 2639 // We order exception specifications thus: 2640 // noexcept is the most restrictive, but is only used in C++0x. 2641 // throw() comes next. 2642 // Then a throw(collected exceptions) 2643 // Finally no specification. 2644 // throw(...) is used instead if any called function uses it. 2645 // 2646 // If this exception specification cannot be known yet (for instance, 2647 // because this is the exception specification for a defaulted default 2648 // constructor and we haven't finished parsing the deferred parts of the 2649 // class yet), the C++0x standard does not specify how to behave. We 2650 // record this as an 'unknown' exception specification, which overrules 2651 // any other specification (even 'none', to keep this rule simple). 2652 ExceptionSpecificationType ComputedEST; 2653 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2654 SmallVector<QualType, 4> Exceptions; 2655 2656 void ClearExceptions() { 2657 ExceptionsSeen.clear(); 2658 Exceptions.clear(); 2659 } 2660 2661 public: 2662 explicit ImplicitExceptionSpecification(ASTContext &Context) 2663 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2664 if (!Context.getLangOptions().CPlusPlus0x) 2665 ComputedEST = EST_DynamicNone; 2666 } 2667 2668 /// \brief Get the computed exception specification type. 2669 ExceptionSpecificationType getExceptionSpecType() const { 2670 assert(ComputedEST != EST_ComputedNoexcept && 2671 "noexcept(expr) should not be a possible result"); 2672 return ComputedEST; 2673 } 2674 2675 /// \brief The number of exceptions in the exception specification. 2676 unsigned size() const { return Exceptions.size(); } 2677 2678 /// \brief The set of exceptions in the exception specification. 2679 const QualType *data() const { return Exceptions.data(); } 2680 2681 /// \brief Integrate another called method into the collected data. 2682 void CalledDecl(CXXMethodDecl *Method); 2683 2684 /// \brief Integrate an invoked expression into the collected data. 2685 void CalledExpr(Expr *E); 2686 2687 /// \brief Specify that the exception specification can't be detemined yet. 2688 void SetDelayed() { 2689 ClearExceptions(); 2690 ComputedEST = EST_Delayed; 2691 } 2692 2693 FunctionProtoType::ExtProtoInfo getEPI() const { 2694 FunctionProtoType::ExtProtoInfo EPI; 2695 EPI.ExceptionSpecType = getExceptionSpecType(); 2696 EPI.NumExceptions = size(); 2697 EPI.Exceptions = data(); 2698 return EPI; 2699 } 2700 }; 2701 2702 /// \brief Determine what sort of exception specification a defaulted 2703 /// copy constructor of a class will have. 2704 ImplicitExceptionSpecification 2705 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2706 2707 /// \brief Determine what sort of exception specification a defaulted 2708 /// default constructor of a class will have, and whether the parameter 2709 /// will be const. 2710 std::pair<ImplicitExceptionSpecification, bool> 2711 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2712 2713 /// \brief Determine what sort of exception specification a defautled 2714 /// copy assignment operator of a class will have, and whether the 2715 /// parameter will be const. 2716 std::pair<ImplicitExceptionSpecification, bool> 2717 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2718 2719 /// \brief Determine what sort of exception specification a defaulted 2720 /// destructor of a class will have. 2721 ImplicitExceptionSpecification 2722 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 2723 2724 /// \brief Determine if a defaulted default constructor ought to be 2725 /// deleted. 2726 bool ShouldDeleteDefaultConstructor(CXXConstructorDecl *CD); 2727 2728 /// \brief Determine if a defaulted copy constructor ought to be 2729 /// deleted. 2730 bool ShouldDeleteCopyConstructor(CXXConstructorDecl *CD); 2731 2732 /// \brief Determine if a defaulted copy assignment operator ought to be 2733 /// deleted. 2734 bool ShouldDeleteCopyAssignmentOperator(CXXMethodDecl *MD); 2735 2736 /// \brief Determine if a defaulted destructor ought to be deleted. 2737 bool ShouldDeleteDestructor(CXXDestructorDecl *DD); 2738 2739 /// \brief Declare the implicit default constructor for the given class. 2740 /// 2741 /// \param ClassDecl The class declaration into which the implicit 2742 /// default constructor will be added. 2743 /// 2744 /// \returns The implicitly-declared default constructor. 2745 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2746 CXXRecordDecl *ClassDecl); 2747 2748 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2749 /// defining this constructor as the default constructor. 2750 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2751 CXXConstructorDecl *Constructor); 2752 2753 /// \brief Declare the implicit destructor for the given class. 2754 /// 2755 /// \param ClassDecl The class declaration into which the implicit 2756 /// destructor will be added. 2757 /// 2758 /// \returns The implicitly-declared destructor. 2759 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2760 2761 /// DefineImplicitDestructor - Checks for feasibility of 2762 /// defining this destructor as the default destructor. 2763 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2764 CXXDestructorDecl *Destructor); 2765 2766 /// \brief Build an exception spec for destructors that don't have one. 2767 /// 2768 /// C++11 says that user-defined destructors with no exception spec get one 2769 /// that looks as if the destructor was implicitly declared. 2770 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 2771 CXXDestructorDecl *Destructor); 2772 2773 /// \brief Declare all inherited constructors for the given class. 2774 /// 2775 /// \param ClassDecl The class declaration into which the inherited 2776 /// constructors will be added. 2777 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2778 2779 /// \brief Declare the implicit copy constructor for the given class. 2780 /// 2781 /// \param S The scope of the class, which may be NULL if this is a 2782 /// template instantiation. 2783 /// 2784 /// \param ClassDecl The class declaration into which the implicit 2785 /// copy constructor will be added. 2786 /// 2787 /// \returns The implicitly-declared copy constructor. 2788 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2789 2790 /// DefineImplicitCopyConstructor - Checks for feasibility of 2791 /// defining this constructor as the copy constructor. 2792 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2793 CXXConstructorDecl *Constructor); 2794 2795 /// \brief Declare the implicit copy assignment operator for the given class. 2796 /// 2797 /// \param S The scope of the class, which may be NULL if this is a 2798 /// template instantiation. 2799 /// 2800 /// \param ClassDecl The class declaration into which the implicit 2801 /// copy-assignment operator will be added. 2802 /// 2803 /// \returns The implicitly-declared copy assignment operator. 2804 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2805 2806 /// \brief Defined an implicitly-declared copy assignment operator. 2807 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2808 CXXMethodDecl *MethodDecl); 2809 2810 /// \brief Force the declaration of any implicitly-declared members of this 2811 /// class. 2812 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2813 2814 /// MaybeBindToTemporary - If the passed in expression has a record type with 2815 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 2816 /// it simply returns the passed in expression. 2817 ExprResult MaybeBindToTemporary(Expr *E); 2818 2819 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 2820 MultiExprArg ArgsPtr, 2821 SourceLocation Loc, 2822 ASTOwningVector<Expr*> &ConvertedArgs); 2823 2824 ParsedType getDestructorName(SourceLocation TildeLoc, 2825 IdentifierInfo &II, SourceLocation NameLoc, 2826 Scope *S, CXXScopeSpec &SS, 2827 ParsedType ObjectType, 2828 bool EnteringContext); 2829 2830 // Checks that reinterpret casts don't have undefined behavior. 2831 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 2832 bool IsDereference, SourceRange Range); 2833 2834 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 2835 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 2836 tok::TokenKind Kind, 2837 SourceLocation LAngleBracketLoc, 2838 Declarator &D, 2839 SourceLocation RAngleBracketLoc, 2840 SourceLocation LParenLoc, 2841 Expr *E, 2842 SourceLocation RParenLoc); 2843 2844 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 2845 tok::TokenKind Kind, 2846 TypeSourceInfo *Ty, 2847 Expr *E, 2848 SourceRange AngleBrackets, 2849 SourceRange Parens); 2850 2851 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2852 SourceLocation TypeidLoc, 2853 TypeSourceInfo *Operand, 2854 SourceLocation RParenLoc); 2855 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2856 SourceLocation TypeidLoc, 2857 Expr *Operand, 2858 SourceLocation RParenLoc); 2859 2860 /// ActOnCXXTypeid - Parse typeid( something ). 2861 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 2862 SourceLocation LParenLoc, bool isType, 2863 void *TyOrExpr, 2864 SourceLocation RParenLoc); 2865 2866 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2867 SourceLocation TypeidLoc, 2868 TypeSourceInfo *Operand, 2869 SourceLocation RParenLoc); 2870 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2871 SourceLocation TypeidLoc, 2872 Expr *Operand, 2873 SourceLocation RParenLoc); 2874 2875 /// ActOnCXXUuidof - Parse __uuidof( something ). 2876 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 2877 SourceLocation LParenLoc, bool isType, 2878 void *TyOrExpr, 2879 SourceLocation RParenLoc); 2880 2881 2882 //// ActOnCXXThis - Parse 'this' pointer. 2883 ExprResult ActOnCXXThis(SourceLocation loc); 2884 2885 /// getAndCaptureCurrentThisType - Try to capture a 'this' pointer. Returns 2886 /// the type of the 'this' pointer, or a null type if this is not possible. 2887 QualType getAndCaptureCurrentThisType(); 2888 2889 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 2890 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 2891 2892 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 2893 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 2894 2895 //// ActOnCXXThrow - Parse throw expressions. 2896 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 2897 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 2898 bool IsThrownVarInScope); 2899 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 2900 bool IsThrownVarInScope); 2901 2902 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 2903 /// Can be interpreted either as function-style casting ("int(x)") 2904 /// or class type construction ("ClassType(x,y,z)") 2905 /// or creation of a value-initialized type ("int()"). 2906 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 2907 SourceLocation LParenLoc, 2908 MultiExprArg Exprs, 2909 SourceLocation RParenLoc); 2910 2911 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 2912 SourceLocation LParenLoc, 2913 MultiExprArg Exprs, 2914 SourceLocation RParenLoc); 2915 2916 /// ActOnCXXNew - Parsed a C++ 'new' expression. 2917 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 2918 SourceLocation PlacementLParen, 2919 MultiExprArg PlacementArgs, 2920 SourceLocation PlacementRParen, 2921 SourceRange TypeIdParens, Declarator &D, 2922 SourceLocation ConstructorLParen, 2923 MultiExprArg ConstructorArgs, 2924 SourceLocation ConstructorRParen); 2925 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 2926 SourceLocation PlacementLParen, 2927 MultiExprArg PlacementArgs, 2928 SourceLocation PlacementRParen, 2929 SourceRange TypeIdParens, 2930 QualType AllocType, 2931 TypeSourceInfo *AllocTypeInfo, 2932 Expr *ArraySize, 2933 SourceLocation ConstructorLParen, 2934 MultiExprArg ConstructorArgs, 2935 SourceLocation ConstructorRParen, 2936 bool TypeMayContainAuto = true); 2937 2938 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 2939 SourceRange R); 2940 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 2941 bool UseGlobal, QualType AllocType, bool IsArray, 2942 Expr **PlaceArgs, unsigned NumPlaceArgs, 2943 FunctionDecl *&OperatorNew, 2944 FunctionDecl *&OperatorDelete); 2945 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 2946 DeclarationName Name, Expr** Args, 2947 unsigned NumArgs, DeclContext *Ctx, 2948 bool AllowMissing, FunctionDecl *&Operator, 2949 bool Diagnose = true); 2950 void DeclareGlobalNewDelete(); 2951 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 2952 QualType Argument, 2953 bool addMallocAttr = false); 2954 2955 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 2956 DeclarationName Name, FunctionDecl* &Operator, 2957 bool Diagnose = true); 2958 2959 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 2960 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 2961 bool UseGlobal, bool ArrayForm, 2962 Expr *Operand); 2963 2964 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 2965 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 2966 SourceLocation StmtLoc, 2967 bool ConvertToBoolean); 2968 2969 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 2970 Expr *Operand, SourceLocation RParen); 2971 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 2972 SourceLocation RParen); 2973 2974 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 2975 /// pseudo-functions. 2976 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 2977 SourceLocation KWLoc, 2978 ParsedType Ty, 2979 SourceLocation RParen); 2980 2981 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 2982 SourceLocation KWLoc, 2983 TypeSourceInfo *T, 2984 SourceLocation RParen); 2985 2986 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 2987 /// pseudo-functions. 2988 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 2989 SourceLocation KWLoc, 2990 ParsedType LhsTy, 2991 ParsedType RhsTy, 2992 SourceLocation RParen); 2993 2994 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 2995 SourceLocation KWLoc, 2996 TypeSourceInfo *LhsT, 2997 TypeSourceInfo *RhsT, 2998 SourceLocation RParen); 2999 3000 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3001 /// pseudo-functions. 3002 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3003 SourceLocation KWLoc, 3004 ParsedType LhsTy, 3005 Expr *DimExpr, 3006 SourceLocation RParen); 3007 3008 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3009 SourceLocation KWLoc, 3010 TypeSourceInfo *TSInfo, 3011 Expr *DimExpr, 3012 SourceLocation RParen); 3013 3014 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3015 /// pseudo-functions. 3016 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3017 SourceLocation KWLoc, 3018 Expr *Queried, 3019 SourceLocation RParen); 3020 3021 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3022 SourceLocation KWLoc, 3023 Expr *Queried, 3024 SourceLocation RParen); 3025 3026 ExprResult ActOnStartCXXMemberReference(Scope *S, 3027 Expr *Base, 3028 SourceLocation OpLoc, 3029 tok::TokenKind OpKind, 3030 ParsedType &ObjectType, 3031 bool &MayBePseudoDestructor); 3032 3033 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3034 3035 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3036 SourceLocation OpLoc, 3037 tok::TokenKind OpKind, 3038 const CXXScopeSpec &SS, 3039 TypeSourceInfo *ScopeType, 3040 SourceLocation CCLoc, 3041 SourceLocation TildeLoc, 3042 PseudoDestructorTypeStorage DestroyedType, 3043 bool HasTrailingLParen); 3044 3045 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3046 SourceLocation OpLoc, 3047 tok::TokenKind OpKind, 3048 CXXScopeSpec &SS, 3049 UnqualifiedId &FirstTypeName, 3050 SourceLocation CCLoc, 3051 SourceLocation TildeLoc, 3052 UnqualifiedId &SecondTypeName, 3053 bool HasTrailingLParen); 3054 3055 /// MaybeCreateExprWithCleanups - If the current full-expression 3056 /// requires any cleanups, surround it with a ExprWithCleanups node. 3057 /// Otherwise, just returns the passed-in expression. 3058 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3059 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3060 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3061 3062 ExprResult ActOnFinishFullExpr(Expr *Expr); 3063 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3064 3065 // Marks SS invalid if it represents an incomplete type. 3066 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3067 3068 DeclContext *computeDeclContext(QualType T); 3069 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3070 bool EnteringContext = false); 3071 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3072 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3073 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3074 3075 /// \brief The parser has parsed a global nested-name-specifier '::'. 3076 /// 3077 /// \param S The scope in which this nested-name-specifier occurs. 3078 /// 3079 /// \param CCLoc The location of the '::'. 3080 /// 3081 /// \param SS The nested-name-specifier, which will be updated in-place 3082 /// to reflect the parsed nested-name-specifier. 3083 /// 3084 /// \returns true if an error occurred, false otherwise. 3085 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3086 CXXScopeSpec &SS); 3087 3088 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3089 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3090 3091 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3092 SourceLocation IdLoc, 3093 IdentifierInfo &II, 3094 ParsedType ObjectType); 3095 3096 bool BuildCXXNestedNameSpecifier(Scope *S, 3097 IdentifierInfo &Identifier, 3098 SourceLocation IdentifierLoc, 3099 SourceLocation CCLoc, 3100 QualType ObjectType, 3101 bool EnteringContext, 3102 CXXScopeSpec &SS, 3103 NamedDecl *ScopeLookupResult, 3104 bool ErrorRecoveryLookup); 3105 3106 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3107 /// 3108 /// \param S The scope in which this nested-name-specifier occurs. 3109 /// 3110 /// \param Identifier The identifier preceding the '::'. 3111 /// 3112 /// \param IdentifierLoc The location of the identifier. 3113 /// 3114 /// \param CCLoc The location of the '::'. 3115 /// 3116 /// \param ObjectType The type of the object, if we're parsing 3117 /// nested-name-specifier in a member access expression. 3118 /// 3119 /// \param EnteringContext Whether we're entering the context nominated by 3120 /// this nested-name-specifier. 3121 /// 3122 /// \param SS The nested-name-specifier, which is both an input 3123 /// parameter (the nested-name-specifier before this type) and an 3124 /// output parameter (containing the full nested-name-specifier, 3125 /// including this new type). 3126 /// 3127 /// \returns true if an error occurred, false otherwise. 3128 bool ActOnCXXNestedNameSpecifier(Scope *S, 3129 IdentifierInfo &Identifier, 3130 SourceLocation IdentifierLoc, 3131 SourceLocation CCLoc, 3132 ParsedType ObjectType, 3133 bool EnteringContext, 3134 CXXScopeSpec &SS); 3135 3136 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3137 IdentifierInfo &Identifier, 3138 SourceLocation IdentifierLoc, 3139 SourceLocation ColonLoc, 3140 ParsedType ObjectType, 3141 bool EnteringContext); 3142 3143 /// \brief The parser has parsed a nested-name-specifier 3144 /// 'template[opt] template-name < template-args >::'. 3145 /// 3146 /// \param S The scope in which this nested-name-specifier occurs. 3147 /// 3148 /// \param TemplateLoc The location of the 'template' keyword, if any. 3149 /// 3150 /// \param SS The nested-name-specifier, which is both an input 3151 /// parameter (the nested-name-specifier before this type) and an 3152 /// output parameter (containing the full nested-name-specifier, 3153 /// including this new type). 3154 /// 3155 /// \param TemplateLoc the location of the 'template' keyword, if any. 3156 /// \param TemplateName The template name. 3157 /// \param TemplateNameLoc The location of the template name. 3158 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3159 /// \param TemplateArgs The template arguments. 3160 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3161 /// \param CCLoc The location of the '::'. 3162 3163 /// \param EnteringContext Whether we're entering the context of the 3164 /// nested-name-specifier. 3165 /// 3166 /// 3167 /// \returns true if an error occurred, false otherwise. 3168 bool ActOnCXXNestedNameSpecifier(Scope *S, 3169 SourceLocation TemplateLoc, 3170 CXXScopeSpec &SS, 3171 TemplateTy Template, 3172 SourceLocation TemplateNameLoc, 3173 SourceLocation LAngleLoc, 3174 ASTTemplateArgsPtr TemplateArgs, 3175 SourceLocation RAngleLoc, 3176 SourceLocation CCLoc, 3177 bool EnteringContext); 3178 3179 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3180 /// that the parser can use later to reconstruct the given 3181 /// nested-name-specifier. 3182 /// 3183 /// \param SS A nested-name-specifier. 3184 /// 3185 /// \returns A pointer containing all of the information in the 3186 /// nested-name-specifier \p SS. 3187 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3188 3189 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3190 /// the nested-name-specifier structure. 3191 /// 3192 /// \param Annotation The annotation pointer, produced by 3193 /// \c SaveNestedNameSpecifierAnnotation(). 3194 /// 3195 /// \param AnnotationRange The source range corresponding to the annotation. 3196 /// 3197 /// \param SS The nested-name-specifier that will be updated with the contents 3198 /// of the annotation pointer. 3199 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3200 SourceRange AnnotationRange, 3201 CXXScopeSpec &SS); 3202 3203 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3204 3205 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3206 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3207 /// After this method is called, according to [C++ 3.4.3p3], names should be 3208 /// looked up in the declarator-id's scope, until the declarator is parsed and 3209 /// ActOnCXXExitDeclaratorScope is called. 3210 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3211 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3212 3213 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3214 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3215 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3216 /// Used to indicate that names should revert to being looked up in the 3217 /// defining scope. 3218 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3219 3220 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3221 /// initializer for the declaration 'Dcl'. 3222 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3223 /// static data member of class X, names should be looked up in the scope of 3224 /// class X. 3225 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3226 3227 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3228 /// initializer for the declaration 'Dcl'. 3229 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3230 3231 // ParseObjCStringLiteral - Parse Objective-C string literals. 3232 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3233 Expr **Strings, 3234 unsigned NumStrings); 3235 3236 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3237 TypeSourceInfo *EncodedTypeInfo, 3238 SourceLocation RParenLoc); 3239 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3240 CXXMethodDecl *Method); 3241 3242 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3243 SourceLocation EncodeLoc, 3244 SourceLocation LParenLoc, 3245 ParsedType Ty, 3246 SourceLocation RParenLoc); 3247 3248 // ParseObjCSelectorExpression - Build selector expression for @selector 3249 ExprResult ParseObjCSelectorExpression(Selector Sel, 3250 SourceLocation AtLoc, 3251 SourceLocation SelLoc, 3252 SourceLocation LParenLoc, 3253 SourceLocation RParenLoc); 3254 3255 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3256 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3257 SourceLocation AtLoc, 3258 SourceLocation ProtoLoc, 3259 SourceLocation LParenLoc, 3260 SourceLocation RParenLoc); 3261 3262 //===--------------------------------------------------------------------===// 3263 // C++ Declarations 3264 // 3265 Decl *ActOnStartLinkageSpecification(Scope *S, 3266 SourceLocation ExternLoc, 3267 SourceLocation LangLoc, 3268 StringRef Lang, 3269 SourceLocation LBraceLoc); 3270 Decl *ActOnFinishLinkageSpecification(Scope *S, 3271 Decl *LinkageSpec, 3272 SourceLocation RBraceLoc); 3273 3274 3275 //===--------------------------------------------------------------------===// 3276 // C++ Classes 3277 // 3278 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3279 const CXXScopeSpec *SS = 0); 3280 3281 Decl *ActOnAccessSpecifier(AccessSpecifier Access, 3282 SourceLocation ASLoc, 3283 SourceLocation ColonLoc); 3284 3285 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3286 Declarator &D, 3287 MultiTemplateParamsArg TemplateParameterLists, 3288 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3289 Expr *Init, bool HasDeferredInit, 3290 bool IsDefinition); 3291 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3292 Expr *Init); 3293 3294 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3295 Scope *S, 3296 CXXScopeSpec &SS, 3297 IdentifierInfo *MemberOrBase, 3298 ParsedType TemplateTypeTy, 3299 SourceLocation IdLoc, 3300 SourceLocation LParenLoc, 3301 Expr **Args, unsigned NumArgs, 3302 SourceLocation RParenLoc, 3303 SourceLocation EllipsisLoc); 3304 3305 MemInitResult BuildMemberInitializer(ValueDecl *Member, Expr **Args, 3306 unsigned NumArgs, SourceLocation IdLoc, 3307 SourceLocation LParenLoc, 3308 SourceLocation RParenLoc); 3309 3310 MemInitResult BuildBaseInitializer(QualType BaseType, 3311 TypeSourceInfo *BaseTInfo, 3312 Expr **Args, unsigned NumArgs, 3313 SourceLocation LParenLoc, 3314 SourceLocation RParenLoc, 3315 CXXRecordDecl *ClassDecl, 3316 SourceLocation EllipsisLoc); 3317 3318 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3319 Expr **Args, unsigned NumArgs, 3320 SourceLocation BaseLoc, 3321 SourceLocation RParenLoc, 3322 SourceLocation LParenLoc, 3323 CXXRecordDecl *ClassDecl); 3324 3325 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3326 CXXCtorInitializer *Initializer); 3327 3328 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3329 CXXCtorInitializer **Initializers, 3330 unsigned NumInitializers, bool AnyErrors); 3331 3332 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3333 3334 3335 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3336 /// mark all the non-trivial destructors of its members and bases as 3337 /// referenced. 3338 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3339 CXXRecordDecl *Record); 3340 3341 /// \brief The list of classes whose vtables have been used within 3342 /// this translation unit, and the source locations at which the 3343 /// first use occurred. 3344 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3345 3346 /// \brief The list of vtables that are required but have not yet been 3347 /// materialized. 3348 SmallVector<VTableUse, 16> VTableUses; 3349 3350 /// \brief The set of classes whose vtables have been used within 3351 /// this translation unit, and a bit that will be true if the vtable is 3352 /// required to be emitted (otherwise, it should be emitted only if needed 3353 /// by code generation). 3354 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3355 3356 /// \brief A list of all of the dynamic classes in this translation 3357 /// unit. 3358 SmallVector<CXXRecordDecl *, 16> DynamicClasses; 3359 3360 /// \brief Note that the vtable for the given class was used at the 3361 /// given location. 3362 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3363 bool DefinitionRequired = false); 3364 3365 /// MarkVirtualMembersReferenced - Will mark all members of the given 3366 /// CXXRecordDecl referenced. 3367 void MarkVirtualMembersReferenced(SourceLocation Loc, 3368 const CXXRecordDecl *RD); 3369 3370 /// \brief Define all of the vtables that have been used in this 3371 /// translation unit and reference any virtual members used by those 3372 /// vtables. 3373 /// 3374 /// \returns true if any work was done, false otherwise. 3375 bool DefineUsedVTables(); 3376 3377 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3378 3379 void ActOnMemInitializers(Decl *ConstructorDecl, 3380 SourceLocation ColonLoc, 3381 MemInitTy **MemInits, unsigned NumMemInits, 3382 bool AnyErrors); 3383 3384 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3385 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3386 Decl *TagDecl, 3387 SourceLocation LBrac, 3388 SourceLocation RBrac, 3389 AttributeList *AttrList); 3390 3391 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3392 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3393 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3394 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3395 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3396 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3397 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3398 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3399 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3400 bool IsInsideALocalClassWithinATemplateFunction(); 3401 3402 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3403 Expr *AssertExpr, 3404 Expr *AssertMessageExpr, 3405 SourceLocation RParenLoc); 3406 3407 FriendDecl *CheckFriendTypeDecl(SourceLocation FriendLoc, 3408 TypeSourceInfo *TSInfo); 3409 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3410 MultiTemplateParamsArg TemplateParams); 3411 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, bool IsDefinition, 3412 MultiTemplateParamsArg TemplateParams); 3413 3414 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3415 StorageClass& SC); 3416 void CheckConstructor(CXXConstructorDecl *Constructor); 3417 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3418 StorageClass& SC); 3419 bool CheckDestructor(CXXDestructorDecl *Destructor); 3420 void CheckConversionDeclarator(Declarator &D, QualType &R, 3421 StorageClass& SC); 3422 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3423 3424 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3425 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3426 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3427 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3428 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3429 3430 //===--------------------------------------------------------------------===// 3431 // C++ Derived Classes 3432 // 3433 3434 /// ActOnBaseSpecifier - Parsed a base specifier 3435 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3436 SourceRange SpecifierRange, 3437 bool Virtual, AccessSpecifier Access, 3438 TypeSourceInfo *TInfo, 3439 SourceLocation EllipsisLoc); 3440 3441 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3442 SourceRange SpecifierRange, 3443 bool Virtual, AccessSpecifier Access, 3444 ParsedType basetype, 3445 SourceLocation BaseLoc, 3446 SourceLocation EllipsisLoc); 3447 3448 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3449 unsigned NumBases); 3450 void ActOnBaseSpecifiers(Decl *ClassDecl, BaseTy **Bases, unsigned NumBases); 3451 3452 bool IsDerivedFrom(QualType Derived, QualType Base); 3453 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3454 3455 // FIXME: I don't like this name. 3456 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3457 3458 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3459 3460 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3461 SourceLocation Loc, SourceRange Range, 3462 CXXCastPath *BasePath = 0, 3463 bool IgnoreAccess = false); 3464 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3465 unsigned InaccessibleBaseID, 3466 unsigned AmbigiousBaseConvID, 3467 SourceLocation Loc, SourceRange Range, 3468 DeclarationName Name, 3469 CXXCastPath *BasePath); 3470 3471 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3472 3473 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3474 /// covariant, according to C++ [class.virtual]p5. 3475 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3476 const CXXMethodDecl *Old); 3477 3478 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3479 /// spec is a subset of base spec. 3480 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3481 const CXXMethodDecl *Old); 3482 3483 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3484 3485 /// CheckOverrideControl - Check C++0x override control semantics. 3486 void CheckOverrideControl(const Decl *D); 3487 3488 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3489 /// overrides a virtual member function marked 'final', according to 3490 /// C++0x [class.virtual]p3. 3491 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3492 const CXXMethodDecl *Old); 3493 3494 3495 //===--------------------------------------------------------------------===// 3496 // C++ Access Control 3497 // 3498 3499 enum AccessResult { 3500 AR_accessible, 3501 AR_inaccessible, 3502 AR_dependent, 3503 AR_delayed 3504 }; 3505 3506 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3507 NamedDecl *PrevMemberDecl, 3508 AccessSpecifier LexicalAS); 3509 3510 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3511 DeclAccessPair FoundDecl); 3512 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3513 DeclAccessPair FoundDecl); 3514 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3515 SourceRange PlacementRange, 3516 CXXRecordDecl *NamingClass, 3517 DeclAccessPair FoundDecl, 3518 bool Diagnose = true); 3519 AccessResult CheckConstructorAccess(SourceLocation Loc, 3520 CXXConstructorDecl *D, 3521 const InitializedEntity &Entity, 3522 AccessSpecifier Access, 3523 bool IsCopyBindingRefToTemp = false); 3524 AccessResult CheckConstructorAccess(SourceLocation Loc, 3525 CXXConstructorDecl *D, 3526 AccessSpecifier Access, 3527 PartialDiagnostic PD); 3528 AccessResult CheckDestructorAccess(SourceLocation Loc, 3529 CXXDestructorDecl *Dtor, 3530 const PartialDiagnostic &PDiag); 3531 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3532 NamedDecl *D, 3533 const PartialDiagnostic &PDiag); 3534 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3535 Expr *ObjectExpr, 3536 Expr *ArgExpr, 3537 DeclAccessPair FoundDecl); 3538 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3539 DeclAccessPair FoundDecl); 3540 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3541 QualType Base, QualType Derived, 3542 const CXXBasePath &Path, 3543 unsigned DiagID, 3544 bool ForceCheck = false, 3545 bool ForceUnprivileged = false); 3546 void CheckLookupAccess(const LookupResult &R); 3547 3548 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3549 const MultiLevelTemplateArgumentList &TemplateArgs); 3550 void PerformDependentDiagnostics(const DeclContext *Pattern, 3551 const MultiLevelTemplateArgumentList &TemplateArgs); 3552 3553 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3554 3555 /// A flag to suppress access checking. 3556 bool SuppressAccessChecking; 3557 3558 /// \brief When true, access checking violations are treated as SFINAE 3559 /// failures rather than hard errors. 3560 bool AccessCheckingSFINAE; 3561 3562 void ActOnStartSuppressingAccessChecks(); 3563 void ActOnStopSuppressingAccessChecks(); 3564 3565 enum AbstractDiagSelID { 3566 AbstractNone = -1, 3567 AbstractReturnType, 3568 AbstractParamType, 3569 AbstractVariableType, 3570 AbstractFieldType, 3571 AbstractArrayType 3572 }; 3573 3574 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3575 const PartialDiagnostic &PD); 3576 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3577 3578 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3579 AbstractDiagSelID SelID = AbstractNone); 3580 3581 //===--------------------------------------------------------------------===// 3582 // C++ Overloaded Operators [C++ 13.5] 3583 // 3584 3585 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3586 3587 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3588 3589 //===--------------------------------------------------------------------===// 3590 // C++ Templates [C++ 14] 3591 // 3592 void FilterAcceptableTemplateNames(LookupResult &R); 3593 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3594 3595 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3596 QualType ObjectType, bool EnteringContext, 3597 bool &MemberOfUnknownSpecialization); 3598 3599 TemplateNameKind isTemplateName(Scope *S, 3600 CXXScopeSpec &SS, 3601 bool hasTemplateKeyword, 3602 UnqualifiedId &Name, 3603 ParsedType ObjectType, 3604 bool EnteringContext, 3605 TemplateTy &Template, 3606 bool &MemberOfUnknownSpecialization); 3607 3608 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3609 SourceLocation IILoc, 3610 Scope *S, 3611 const CXXScopeSpec *SS, 3612 TemplateTy &SuggestedTemplate, 3613 TemplateNameKind &SuggestedKind); 3614 3615 bool DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3616 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3617 3618 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3619 SourceLocation EllipsisLoc, 3620 SourceLocation KeyLoc, 3621 IdentifierInfo *ParamName, 3622 SourceLocation ParamNameLoc, 3623 unsigned Depth, unsigned Position, 3624 SourceLocation EqualLoc, 3625 ParsedType DefaultArg); 3626 3627 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3628 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3629 unsigned Depth, 3630 unsigned Position, 3631 SourceLocation EqualLoc, 3632 Expr *DefaultArg); 3633 Decl *ActOnTemplateTemplateParameter(Scope *S, 3634 SourceLocation TmpLoc, 3635 TemplateParamsTy *Params, 3636 SourceLocation EllipsisLoc, 3637 IdentifierInfo *ParamName, 3638 SourceLocation ParamNameLoc, 3639 unsigned Depth, 3640 unsigned Position, 3641 SourceLocation EqualLoc, 3642 ParsedTemplateArgument DefaultArg); 3643 3644 TemplateParamsTy * 3645 ActOnTemplateParameterList(unsigned Depth, 3646 SourceLocation ExportLoc, 3647 SourceLocation TemplateLoc, 3648 SourceLocation LAngleLoc, 3649 Decl **Params, unsigned NumParams, 3650 SourceLocation RAngleLoc); 3651 3652 /// \brief The context in which we are checking a template parameter 3653 /// list. 3654 enum TemplateParamListContext { 3655 TPC_ClassTemplate, 3656 TPC_FunctionTemplate, 3657 TPC_ClassTemplateMember, 3658 TPC_FriendFunctionTemplate, 3659 TPC_FriendFunctionTemplateDefinition, 3660 TPC_TypeAliasTemplate 3661 }; 3662 3663 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3664 TemplateParameterList *OldParams, 3665 TemplateParamListContext TPC); 3666 TemplateParameterList * 3667 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3668 SourceLocation DeclLoc, 3669 const CXXScopeSpec &SS, 3670 TemplateParameterList **ParamLists, 3671 unsigned NumParamLists, 3672 bool IsFriend, 3673 bool &IsExplicitSpecialization, 3674 bool &Invalid); 3675 3676 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3677 SourceLocation KWLoc, CXXScopeSpec &SS, 3678 IdentifierInfo *Name, SourceLocation NameLoc, 3679 AttributeList *Attr, 3680 TemplateParameterList *TemplateParams, 3681 AccessSpecifier AS, 3682 unsigned NumOuterTemplateParamLists, 3683 TemplateParameterList **OuterTemplateParamLists); 3684 3685 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3686 TemplateArgumentListInfo &Out); 3687 3688 void NoteAllFoundTemplates(TemplateName Name); 3689 3690 QualType CheckTemplateIdType(TemplateName Template, 3691 SourceLocation TemplateLoc, 3692 TemplateArgumentListInfo &TemplateArgs); 3693 3694 TypeResult 3695 ActOnTemplateIdType(CXXScopeSpec &SS, 3696 TemplateTy Template, SourceLocation TemplateLoc, 3697 SourceLocation LAngleLoc, 3698 ASTTemplateArgsPtr TemplateArgs, 3699 SourceLocation RAngleLoc); 3700 3701 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3702 /// such as \c class T::template apply<U>. 3703 /// 3704 /// \param TUK 3705 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3706 TypeSpecifierType TagSpec, 3707 SourceLocation TagLoc, 3708 CXXScopeSpec &SS, 3709 TemplateTy TemplateD, 3710 SourceLocation TemplateLoc, 3711 SourceLocation LAngleLoc, 3712 ASTTemplateArgsPtr TemplateArgsIn, 3713 SourceLocation RAngleLoc); 3714 3715 3716 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3717 LookupResult &R, 3718 bool RequiresADL, 3719 const TemplateArgumentListInfo &TemplateArgs); 3720 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3721 const DeclarationNameInfo &NameInfo, 3722 const TemplateArgumentListInfo &TemplateArgs); 3723 3724 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3725 SourceLocation TemplateKWLoc, 3726 CXXScopeSpec &SS, 3727 UnqualifiedId &Name, 3728 ParsedType ObjectType, 3729 bool EnteringContext, 3730 TemplateTy &Template); 3731 3732 DeclResult 3733 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3734 SourceLocation KWLoc, 3735 CXXScopeSpec &SS, 3736 TemplateTy Template, 3737 SourceLocation TemplateNameLoc, 3738 SourceLocation LAngleLoc, 3739 ASTTemplateArgsPtr TemplateArgs, 3740 SourceLocation RAngleLoc, 3741 AttributeList *Attr, 3742 MultiTemplateParamsArg TemplateParameterLists); 3743 3744 Decl *ActOnTemplateDeclarator(Scope *S, 3745 MultiTemplateParamsArg TemplateParameterLists, 3746 Declarator &D); 3747 3748 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3749 MultiTemplateParamsArg TemplateParameterLists, 3750 Declarator &D); 3751 3752 bool 3753 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3754 TemplateSpecializationKind NewTSK, 3755 NamedDecl *PrevDecl, 3756 TemplateSpecializationKind PrevTSK, 3757 SourceLocation PrevPtOfInstantiation, 3758 bool &SuppressNew); 3759 3760 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3761 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3762 LookupResult &Previous); 3763 3764 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 3765 TemplateArgumentListInfo *ExplicitTemplateArgs, 3766 LookupResult &Previous); 3767 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 3768 3769 DeclResult 3770 ActOnExplicitInstantiation(Scope *S, 3771 SourceLocation ExternLoc, 3772 SourceLocation TemplateLoc, 3773 unsigned TagSpec, 3774 SourceLocation KWLoc, 3775 const CXXScopeSpec &SS, 3776 TemplateTy Template, 3777 SourceLocation TemplateNameLoc, 3778 SourceLocation LAngleLoc, 3779 ASTTemplateArgsPtr TemplateArgs, 3780 SourceLocation RAngleLoc, 3781 AttributeList *Attr); 3782 3783 DeclResult 3784 ActOnExplicitInstantiation(Scope *S, 3785 SourceLocation ExternLoc, 3786 SourceLocation TemplateLoc, 3787 unsigned TagSpec, 3788 SourceLocation KWLoc, 3789 CXXScopeSpec &SS, 3790 IdentifierInfo *Name, 3791 SourceLocation NameLoc, 3792 AttributeList *Attr); 3793 3794 DeclResult ActOnExplicitInstantiation(Scope *S, 3795 SourceLocation ExternLoc, 3796 SourceLocation TemplateLoc, 3797 Declarator &D); 3798 3799 TemplateArgumentLoc 3800 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 3801 SourceLocation TemplateLoc, 3802 SourceLocation RAngleLoc, 3803 Decl *Param, 3804 SmallVectorImpl<TemplateArgument> &Converted); 3805 3806 /// \brief Specifies the context in which a particular template 3807 /// argument is being checked. 3808 enum CheckTemplateArgumentKind { 3809 /// \brief The template argument was specified in the code or was 3810 /// instantiated with some deduced template arguments. 3811 CTAK_Specified, 3812 3813 /// \brief The template argument was deduced via template argument 3814 /// deduction. 3815 CTAK_Deduced, 3816 3817 /// \brief The template argument was deduced from an array bound 3818 /// via template argument deduction. 3819 CTAK_DeducedFromArrayBound 3820 }; 3821 3822 bool CheckTemplateArgument(NamedDecl *Param, 3823 const TemplateArgumentLoc &Arg, 3824 NamedDecl *Template, 3825 SourceLocation TemplateLoc, 3826 SourceLocation RAngleLoc, 3827 unsigned ArgumentPackIndex, 3828 SmallVectorImpl<TemplateArgument> &Converted, 3829 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3830 3831 /// \brief Check that the given template arguments can be be provided to 3832 /// the given template, converting the arguments along the way. 3833 /// 3834 /// \param Template The template to which the template arguments are being 3835 /// provided. 3836 /// 3837 /// \param TemplateLoc The location of the template name in the source. 3838 /// 3839 /// \param TemplateArgs The list of template arguments. If the template is 3840 /// a template template parameter, this function may extend the set of 3841 /// template arguments to also include substituted, defaulted template 3842 /// arguments. 3843 /// 3844 /// \param PartialTemplateArgs True if the list of template arguments is 3845 /// intentionally partial, e.g., because we're checking just the initial 3846 /// set of template arguments. 3847 /// 3848 /// \param Converted Will receive the converted, canonicalized template 3849 /// arguments. 3850 /// 3851 /// \returns True if an error occurred, false otherwise. 3852 bool CheckTemplateArgumentList(TemplateDecl *Template, 3853 SourceLocation TemplateLoc, 3854 TemplateArgumentListInfo &TemplateArgs, 3855 bool PartialTemplateArgs, 3856 SmallVectorImpl<TemplateArgument> &Converted); 3857 3858 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 3859 const TemplateArgumentLoc &Arg, 3860 SmallVectorImpl<TemplateArgument> &Converted); 3861 3862 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 3863 TypeSourceInfo *Arg); 3864 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 3865 TemplateArgument &Converted); 3866 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 3867 QualType InstantiatedParamType, Expr *Arg, 3868 TemplateArgument &Converted, 3869 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3870 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 3871 const TemplateArgumentLoc &Arg); 3872 3873 ExprResult 3874 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 3875 QualType ParamType, 3876 SourceLocation Loc); 3877 ExprResult 3878 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 3879 SourceLocation Loc); 3880 3881 /// \brief Enumeration describing how template parameter lists are compared 3882 /// for equality. 3883 enum TemplateParameterListEqualKind { 3884 /// \brief We are matching the template parameter lists of two templates 3885 /// that might be redeclarations. 3886 /// 3887 /// \code 3888 /// template<typename T> struct X; 3889 /// template<typename T> struct X; 3890 /// \endcode 3891 TPL_TemplateMatch, 3892 3893 /// \brief We are matching the template parameter lists of two template 3894 /// template parameters as part of matching the template parameter lists 3895 /// of two templates that might be redeclarations. 3896 /// 3897 /// \code 3898 /// template<template<int I> class TT> struct X; 3899 /// template<template<int Value> class Other> struct X; 3900 /// \endcode 3901 TPL_TemplateTemplateParmMatch, 3902 3903 /// \brief We are matching the template parameter lists of a template 3904 /// template argument against the template parameter lists of a template 3905 /// template parameter. 3906 /// 3907 /// \code 3908 /// template<template<int Value> class Metafun> struct X; 3909 /// template<int Value> struct integer_c; 3910 /// X<integer_c> xic; 3911 /// \endcode 3912 TPL_TemplateTemplateArgumentMatch 3913 }; 3914 3915 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 3916 TemplateParameterList *Old, 3917 bool Complain, 3918 TemplateParameterListEqualKind Kind, 3919 SourceLocation TemplateArgLoc 3920 = SourceLocation()); 3921 3922 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 3923 3924 /// \brief Called when the parser has parsed a C++ typename 3925 /// specifier, e.g., "typename T::type". 3926 /// 3927 /// \param S The scope in which this typename type occurs. 3928 /// \param TypenameLoc the location of the 'typename' keyword 3929 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3930 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 3931 /// \param IdLoc the location of the identifier. 3932 TypeResult 3933 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3934 const CXXScopeSpec &SS, const IdentifierInfo &II, 3935 SourceLocation IdLoc); 3936 3937 /// \brief Called when the parser has parsed a C++ typename 3938 /// specifier that ends in a template-id, e.g., 3939 /// "typename MetaFun::template apply<T1, T2>". 3940 /// 3941 /// \param S The scope in which this typename type occurs. 3942 /// \param TypenameLoc the location of the 'typename' keyword 3943 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3944 /// \param TemplateLoc the location of the 'template' keyword, if any. 3945 /// \param TemplateName The template name. 3946 /// \param TemplateNameLoc The location of the template name. 3947 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3948 /// \param TemplateArgs The template arguments. 3949 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3950 TypeResult 3951 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3952 const CXXScopeSpec &SS, 3953 SourceLocation TemplateLoc, 3954 TemplateTy Template, 3955 SourceLocation TemplateNameLoc, 3956 SourceLocation LAngleLoc, 3957 ASTTemplateArgsPtr TemplateArgs, 3958 SourceLocation RAngleLoc); 3959 3960 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 3961 SourceLocation KeywordLoc, 3962 NestedNameSpecifierLoc QualifierLoc, 3963 const IdentifierInfo &II, 3964 SourceLocation IILoc); 3965 3966 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 3967 SourceLocation Loc, 3968 DeclarationName Name); 3969 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 3970 3971 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 3972 3973 std::string 3974 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3975 const TemplateArgumentList &Args); 3976 3977 std::string 3978 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3979 const TemplateArgument *Args, 3980 unsigned NumArgs); 3981 3982 //===--------------------------------------------------------------------===// 3983 // C++ Variadic Templates (C++0x [temp.variadic]) 3984 //===--------------------------------------------------------------------===// 3985 3986 /// \brief The context in which an unexpanded parameter pack is 3987 /// being diagnosed. 3988 /// 3989 /// Note that the values of this enumeration line up with the first 3990 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 3991 enum UnexpandedParameterPackContext { 3992 /// \brief An arbitrary expression. 3993 UPPC_Expression = 0, 3994 3995 /// \brief The base type of a class type. 3996 UPPC_BaseType, 3997 3998 /// \brief The type of an arbitrary declaration. 3999 UPPC_DeclarationType, 4000 4001 /// \brief The type of a data member. 4002 UPPC_DataMemberType, 4003 4004 /// \brief The size of a bit-field. 4005 UPPC_BitFieldWidth, 4006 4007 /// \brief The expression in a static assertion. 4008 UPPC_StaticAssertExpression, 4009 4010 /// \brief The fixed underlying type of an enumeration. 4011 UPPC_FixedUnderlyingType, 4012 4013 /// \brief The enumerator value. 4014 UPPC_EnumeratorValue, 4015 4016 /// \brief A using declaration. 4017 UPPC_UsingDeclaration, 4018 4019 /// \brief A friend declaration. 4020 UPPC_FriendDeclaration, 4021 4022 /// \brief A declaration qualifier. 4023 UPPC_DeclarationQualifier, 4024 4025 /// \brief An initializer. 4026 UPPC_Initializer, 4027 4028 /// \brief A default argument. 4029 UPPC_DefaultArgument, 4030 4031 /// \brief The type of a non-type template parameter. 4032 UPPC_NonTypeTemplateParameterType, 4033 4034 /// \brief The type of an exception. 4035 UPPC_ExceptionType, 4036 4037 /// \brief Partial specialization. 4038 UPPC_PartialSpecialization 4039 }; 4040 4041 /// \brief If the given type contains an unexpanded parameter pack, 4042 /// diagnose the error. 4043 /// 4044 /// \param Loc The source location where a diagnostc should be emitted. 4045 /// 4046 /// \param T The type that is being checked for unexpanded parameter 4047 /// packs. 4048 /// 4049 /// \returns true if an error occurred, false otherwise. 4050 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4051 UnexpandedParameterPackContext UPPC); 4052 4053 /// \brief If the given expression contains an unexpanded parameter 4054 /// pack, diagnose the error. 4055 /// 4056 /// \param E The expression that is being checked for unexpanded 4057 /// parameter packs. 4058 /// 4059 /// \returns true if an error occurred, false otherwise. 4060 bool DiagnoseUnexpandedParameterPack(Expr *E, 4061 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4062 4063 /// \brief If the given nested-name-specifier contains an unexpanded 4064 /// parameter pack, diagnose the error. 4065 /// 4066 /// \param SS The nested-name-specifier that is being checked for 4067 /// unexpanded parameter packs. 4068 /// 4069 /// \returns true if an error occurred, false otherwise. 4070 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4071 UnexpandedParameterPackContext UPPC); 4072 4073 /// \brief If the given name contains an unexpanded parameter pack, 4074 /// diagnose the error. 4075 /// 4076 /// \param NameInfo The name (with source location information) that 4077 /// is being checked for unexpanded parameter packs. 4078 /// 4079 /// \returns true if an error occurred, false otherwise. 4080 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4081 UnexpandedParameterPackContext UPPC); 4082 4083 /// \brief If the given template name contains an unexpanded parameter pack, 4084 /// diagnose the error. 4085 /// 4086 /// \param Loc The location of the template name. 4087 /// 4088 /// \param Template The template name that is being checked for unexpanded 4089 /// parameter packs. 4090 /// 4091 /// \returns true if an error occurred, false otherwise. 4092 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4093 TemplateName Template, 4094 UnexpandedParameterPackContext UPPC); 4095 4096 /// \brief If the given template argument contains an unexpanded parameter 4097 /// pack, diagnose the error. 4098 /// 4099 /// \param Arg The template argument that is being checked for unexpanded 4100 /// parameter packs. 4101 /// 4102 /// \returns true if an error occurred, false otherwise. 4103 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4104 UnexpandedParameterPackContext UPPC); 4105 4106 /// \brief Collect the set of unexpanded parameter packs within the given 4107 /// template argument. 4108 /// 4109 /// \param Arg The template argument that will be traversed to find 4110 /// unexpanded parameter packs. 4111 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4112 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4113 4114 /// \brief Collect the set of unexpanded parameter packs within the given 4115 /// template argument. 4116 /// 4117 /// \param Arg The template argument that will be traversed to find 4118 /// unexpanded parameter packs. 4119 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4120 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4121 4122 /// \brief Collect the set of unexpanded parameter packs within the given 4123 /// type. 4124 /// 4125 /// \param T The type that will be traversed to find 4126 /// unexpanded parameter packs. 4127 void collectUnexpandedParameterPacks(QualType T, 4128 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4129 4130 /// \brief Collect the set of unexpanded parameter packs within the given 4131 /// type. 4132 /// 4133 /// \param TL The type that will be traversed to find 4134 /// unexpanded parameter packs. 4135 void collectUnexpandedParameterPacks(TypeLoc TL, 4136 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4137 4138 /// \brief Invoked when parsing a template argument followed by an 4139 /// ellipsis, which creates a pack expansion. 4140 /// 4141 /// \param Arg The template argument preceding the ellipsis, which 4142 /// may already be invalid. 4143 /// 4144 /// \param EllipsisLoc The location of the ellipsis. 4145 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4146 SourceLocation EllipsisLoc); 4147 4148 /// \brief Invoked when parsing a type followed by an ellipsis, which 4149 /// creates a pack expansion. 4150 /// 4151 /// \param Type The type preceding the ellipsis, which will become 4152 /// the pattern of the pack expansion. 4153 /// 4154 /// \param EllipsisLoc The location of the ellipsis. 4155 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4156 4157 /// \brief Construct a pack expansion type from the pattern of the pack 4158 /// expansion. 4159 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4160 SourceLocation EllipsisLoc, 4161 llvm::Optional<unsigned> NumExpansions); 4162 4163 /// \brief Construct a pack expansion type from the pattern of the pack 4164 /// expansion. 4165 QualType CheckPackExpansion(QualType Pattern, 4166 SourceRange PatternRange, 4167 SourceLocation EllipsisLoc, 4168 llvm::Optional<unsigned> NumExpansions); 4169 4170 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4171 /// creates a pack expansion. 4172 /// 4173 /// \param Pattern The expression preceding the ellipsis, which will become 4174 /// the pattern of the pack expansion. 4175 /// 4176 /// \param EllipsisLoc The location of the ellipsis. 4177 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4178 4179 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4180 /// creates a pack expansion. 4181 /// 4182 /// \param Pattern The expression preceding the ellipsis, which will become 4183 /// the pattern of the pack expansion. 4184 /// 4185 /// \param EllipsisLoc The location of the ellipsis. 4186 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4187 llvm::Optional<unsigned> NumExpansions); 4188 4189 /// \brief Determine whether we could expand a pack expansion with the 4190 /// given set of parameter packs into separate arguments by repeatedly 4191 /// transforming the pattern. 4192 /// 4193 /// \param EllipsisLoc The location of the ellipsis that identifies the 4194 /// pack expansion. 4195 /// 4196 /// \param PatternRange The source range that covers the entire pattern of 4197 /// the pack expansion. 4198 /// 4199 /// \param Unexpanded The set of unexpanded parameter packs within the 4200 /// pattern. 4201 /// 4202 /// \param NumUnexpanded The number of unexpanded parameter packs in 4203 /// \p Unexpanded. 4204 /// 4205 /// \param ShouldExpand Will be set to \c true if the transformer should 4206 /// expand the corresponding pack expansions into separate arguments. When 4207 /// set, \c NumExpansions must also be set. 4208 /// 4209 /// \param RetainExpansion Whether the caller should add an unexpanded 4210 /// pack expansion after all of the expanded arguments. This is used 4211 /// when extending explicitly-specified template argument packs per 4212 /// C++0x [temp.arg.explicit]p9. 4213 /// 4214 /// \param NumExpansions The number of separate arguments that will be in 4215 /// the expanded form of the corresponding pack expansion. This is both an 4216 /// input and an output parameter, which can be set by the caller if the 4217 /// number of expansions is known a priori (e.g., due to a prior substitution) 4218 /// and will be set by the callee when the number of expansions is known. 4219 /// The callee must set this value when \c ShouldExpand is \c true; it may 4220 /// set this value in other cases. 4221 /// 4222 /// \returns true if an error occurred (e.g., because the parameter packs 4223 /// are to be instantiated with arguments of different lengths), false 4224 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4225 /// must be set. 4226 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4227 SourceRange PatternRange, 4228 const UnexpandedParameterPack *Unexpanded, 4229 unsigned NumUnexpanded, 4230 const MultiLevelTemplateArgumentList &TemplateArgs, 4231 bool &ShouldExpand, 4232 bool &RetainExpansion, 4233 llvm::Optional<unsigned> &NumExpansions); 4234 4235 /// \brief Determine the number of arguments in the given pack expansion 4236 /// type. 4237 /// 4238 /// This routine already assumes that the pack expansion type can be 4239 /// expanded and that the number of arguments in the expansion is 4240 /// consistent across all of the unexpanded parameter packs in its pattern. 4241 unsigned getNumArgumentsInExpansion(QualType T, 4242 const MultiLevelTemplateArgumentList &TemplateArgs); 4243 4244 /// \brief Determine whether the given declarator contains any unexpanded 4245 /// parameter packs. 4246 /// 4247 /// This routine is used by the parser to disambiguate function declarators 4248 /// with an ellipsis prior to the ')', e.g., 4249 /// 4250 /// \code 4251 /// void f(T...); 4252 /// \endcode 4253 /// 4254 /// To determine whether we have an (unnamed) function parameter pack or 4255 /// a variadic function. 4256 /// 4257 /// \returns true if the declarator contains any unexpanded parameter packs, 4258 /// false otherwise. 4259 bool containsUnexpandedParameterPacks(Declarator &D); 4260 4261 //===--------------------------------------------------------------------===// 4262 // C++ Template Argument Deduction (C++ [temp.deduct]) 4263 //===--------------------------------------------------------------------===// 4264 4265 /// \brief Describes the result of template argument deduction. 4266 /// 4267 /// The TemplateDeductionResult enumeration describes the result of 4268 /// template argument deduction, as returned from 4269 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4270 /// structure provides additional information about the results of 4271 /// template argument deduction, e.g., the deduced template argument 4272 /// list (if successful) or the specific template parameters or 4273 /// deduced arguments that were involved in the failure. 4274 enum TemplateDeductionResult { 4275 /// \brief Template argument deduction was successful. 4276 TDK_Success = 0, 4277 /// \brief Template argument deduction exceeded the maximum template 4278 /// instantiation depth (which has already been diagnosed). 4279 TDK_InstantiationDepth, 4280 /// \brief Template argument deduction did not deduce a value 4281 /// for every template parameter. 4282 TDK_Incomplete, 4283 /// \brief Template argument deduction produced inconsistent 4284 /// deduced values for the given template parameter. 4285 TDK_Inconsistent, 4286 /// \brief Template argument deduction failed due to inconsistent 4287 /// cv-qualifiers on a template parameter type that would 4288 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4289 /// but were given a non-const "X". 4290 TDK_Underqualified, 4291 /// \brief Substitution of the deduced template argument values 4292 /// resulted in an error. 4293 TDK_SubstitutionFailure, 4294 /// \brief Substitution of the deduced template argument values 4295 /// into a non-deduced context produced a type or value that 4296 /// produces a type that does not match the original template 4297 /// arguments provided. 4298 TDK_NonDeducedMismatch, 4299 /// \brief When performing template argument deduction for a function 4300 /// template, there were too many call arguments. 4301 TDK_TooManyArguments, 4302 /// \brief When performing template argument deduction for a function 4303 /// template, there were too few call arguments. 4304 TDK_TooFewArguments, 4305 /// \brief The explicitly-specified template arguments were not valid 4306 /// template arguments for the given template. 4307 TDK_InvalidExplicitArguments, 4308 /// \brief The arguments included an overloaded function name that could 4309 /// not be resolved to a suitable function. 4310 TDK_FailedOverloadResolution 4311 }; 4312 4313 TemplateDeductionResult 4314 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4315 const TemplateArgumentList &TemplateArgs, 4316 sema::TemplateDeductionInfo &Info); 4317 4318 TemplateDeductionResult 4319 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4320 TemplateArgumentListInfo &ExplicitTemplateArgs, 4321 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4322 SmallVectorImpl<QualType> &ParamTypes, 4323 QualType *FunctionType, 4324 sema::TemplateDeductionInfo &Info); 4325 4326 /// brief A function argument from which we performed template argument 4327 // deduction for a call. 4328 struct OriginalCallArg { 4329 OriginalCallArg(QualType OriginalParamType, 4330 unsigned ArgIdx, 4331 QualType OriginalArgType) 4332 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4333 OriginalArgType(OriginalArgType) { } 4334 4335 QualType OriginalParamType; 4336 unsigned ArgIdx; 4337 QualType OriginalArgType; 4338 }; 4339 4340 TemplateDeductionResult 4341 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4342 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4343 unsigned NumExplicitlySpecified, 4344 FunctionDecl *&Specialization, 4345 sema::TemplateDeductionInfo &Info, 4346 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4347 4348 TemplateDeductionResult 4349 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4350 TemplateArgumentListInfo *ExplicitTemplateArgs, 4351 Expr **Args, unsigned NumArgs, 4352 FunctionDecl *&Specialization, 4353 sema::TemplateDeductionInfo &Info); 4354 4355 TemplateDeductionResult 4356 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4357 TemplateArgumentListInfo *ExplicitTemplateArgs, 4358 QualType ArgFunctionType, 4359 FunctionDecl *&Specialization, 4360 sema::TemplateDeductionInfo &Info); 4361 4362 TemplateDeductionResult 4363 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4364 QualType ToType, 4365 CXXConversionDecl *&Specialization, 4366 sema::TemplateDeductionInfo &Info); 4367 4368 TemplateDeductionResult 4369 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4370 TemplateArgumentListInfo *ExplicitTemplateArgs, 4371 FunctionDecl *&Specialization, 4372 sema::TemplateDeductionInfo &Info); 4373 4374 bool DeduceAutoType(TypeSourceInfo *AutoType, Expr *Initializer, 4375 TypeSourceInfo *&Result); 4376 4377 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4378 FunctionTemplateDecl *FT2, 4379 SourceLocation Loc, 4380 TemplatePartialOrderingContext TPOC, 4381 unsigned NumCallArguments); 4382 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4383 UnresolvedSetIterator SEnd, 4384 TemplatePartialOrderingContext TPOC, 4385 unsigned NumCallArguments, 4386 SourceLocation Loc, 4387 const PartialDiagnostic &NoneDiag, 4388 const PartialDiagnostic &AmbigDiag, 4389 const PartialDiagnostic &CandidateDiag, 4390 bool Complain = true); 4391 4392 ClassTemplatePartialSpecializationDecl * 4393 getMoreSpecializedPartialSpecialization( 4394 ClassTemplatePartialSpecializationDecl *PS1, 4395 ClassTemplatePartialSpecializationDecl *PS2, 4396 SourceLocation Loc); 4397 4398 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4399 bool OnlyDeduced, 4400 unsigned Depth, 4401 SmallVectorImpl<bool> &Used); 4402 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4403 SmallVectorImpl<bool> &Deduced); 4404 4405 //===--------------------------------------------------------------------===// 4406 // C++ Template Instantiation 4407 // 4408 4409 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4410 const TemplateArgumentList *Innermost = 0, 4411 bool RelativeToPrimary = false, 4412 const FunctionDecl *Pattern = 0); 4413 4414 /// \brief A template instantiation that is currently in progress. 4415 struct ActiveTemplateInstantiation { 4416 /// \brief The kind of template instantiation we are performing 4417 enum InstantiationKind { 4418 /// We are instantiating a template declaration. The entity is 4419 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4420 TemplateInstantiation, 4421 4422 /// We are instantiating a default argument for a template 4423 /// parameter. The Entity is the template, and 4424 /// TemplateArgs/NumTemplateArguments provides the template 4425 /// arguments as specified. 4426 /// FIXME: Use a TemplateArgumentList 4427 DefaultTemplateArgumentInstantiation, 4428 4429 /// We are instantiating a default argument for a function. 4430 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4431 /// provides the template arguments as specified. 4432 DefaultFunctionArgumentInstantiation, 4433 4434 /// We are substituting explicit template arguments provided for 4435 /// a function template. The entity is a FunctionTemplateDecl. 4436 ExplicitTemplateArgumentSubstitution, 4437 4438 /// We are substituting template argument determined as part of 4439 /// template argument deduction for either a class template 4440 /// partial specialization or a function template. The 4441 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4442 /// a FunctionTemplateDecl. 4443 DeducedTemplateArgumentSubstitution, 4444 4445 /// We are substituting prior template arguments into a new 4446 /// template parameter. The template parameter itself is either a 4447 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4448 PriorTemplateArgumentSubstitution, 4449 4450 /// We are checking the validity of a default template argument that 4451 /// has been used when naming a template-id. 4452 DefaultTemplateArgumentChecking 4453 } Kind; 4454 4455 /// \brief The point of instantiation within the source code. 4456 SourceLocation PointOfInstantiation; 4457 4458 /// \brief The template (or partial specialization) in which we are 4459 /// performing the instantiation, for substitutions of prior template 4460 /// arguments. 4461 NamedDecl *Template; 4462 4463 /// \brief The entity that is being instantiated. 4464 uintptr_t Entity; 4465 4466 /// \brief The list of template arguments we are substituting, if they 4467 /// are not part of the entity. 4468 const TemplateArgument *TemplateArgs; 4469 4470 /// \brief The number of template arguments in TemplateArgs. 4471 unsigned NumTemplateArgs; 4472 4473 /// \brief The template deduction info object associated with the 4474 /// substitution or checking of explicit or deduced template arguments. 4475 sema::TemplateDeductionInfo *DeductionInfo; 4476 4477 /// \brief The source range that covers the construct that cause 4478 /// the instantiation, e.g., the template-id that causes a class 4479 /// template instantiation. 4480 SourceRange InstantiationRange; 4481 4482 ActiveTemplateInstantiation() 4483 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4484 NumTemplateArgs(0), DeductionInfo(0) {} 4485 4486 /// \brief Determines whether this template is an actual instantiation 4487 /// that should be counted toward the maximum instantiation depth. 4488 bool isInstantiationRecord() const; 4489 4490 friend bool operator==(const ActiveTemplateInstantiation &X, 4491 const ActiveTemplateInstantiation &Y) { 4492 if (X.Kind != Y.Kind) 4493 return false; 4494 4495 if (X.Entity != Y.Entity) 4496 return false; 4497 4498 switch (X.Kind) { 4499 case TemplateInstantiation: 4500 return true; 4501 4502 case PriorTemplateArgumentSubstitution: 4503 case DefaultTemplateArgumentChecking: 4504 if (X.Template != Y.Template) 4505 return false; 4506 4507 // Fall through 4508 4509 case DefaultTemplateArgumentInstantiation: 4510 case ExplicitTemplateArgumentSubstitution: 4511 case DeducedTemplateArgumentSubstitution: 4512 case DefaultFunctionArgumentInstantiation: 4513 return X.TemplateArgs == Y.TemplateArgs; 4514 4515 } 4516 4517 return true; 4518 } 4519 4520 friend bool operator!=(const ActiveTemplateInstantiation &X, 4521 const ActiveTemplateInstantiation &Y) { 4522 return !(X == Y); 4523 } 4524 }; 4525 4526 /// \brief List of active template instantiations. 4527 /// 4528 /// This vector is treated as a stack. As one template instantiation 4529 /// requires another template instantiation, additional 4530 /// instantiations are pushed onto the stack up to a 4531 /// user-configurable limit LangOptions::InstantiationDepth. 4532 SmallVector<ActiveTemplateInstantiation, 16> 4533 ActiveTemplateInstantiations; 4534 4535 /// \brief Whether we are in a SFINAE context that is not associated with 4536 /// template instantiation. 4537 /// 4538 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4539 /// of a template instantiation or template argument deduction. 4540 bool InNonInstantiationSFINAEContext; 4541 4542 /// \brief The number of ActiveTemplateInstantiation entries in 4543 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4544 /// therefore, should not be counted as part of the instantiation depth. 4545 unsigned NonInstantiationEntries; 4546 4547 /// \brief The last template from which a template instantiation 4548 /// error or warning was produced. 4549 /// 4550 /// This value is used to suppress printing of redundant template 4551 /// instantiation backtraces when there are multiple errors in the 4552 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4553 /// to implement it anywhere else. 4554 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4555 4556 /// \brief The current index into pack expansion arguments that will be 4557 /// used for substitution of parameter packs. 4558 /// 4559 /// The pack expansion index will be -1 to indicate that parameter packs 4560 /// should be instantiated as themselves. Otherwise, the index specifies 4561 /// which argument within the parameter pack will be used for substitution. 4562 int ArgumentPackSubstitutionIndex; 4563 4564 /// \brief RAII object used to change the argument pack substitution index 4565 /// within a \c Sema object. 4566 /// 4567 /// See \c ArgumentPackSubstitutionIndex for more information. 4568 class ArgumentPackSubstitutionIndexRAII { 4569 Sema &Self; 4570 int OldSubstitutionIndex; 4571 4572 public: 4573 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4574 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4575 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4576 } 4577 4578 ~ArgumentPackSubstitutionIndexRAII() { 4579 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4580 } 4581 }; 4582 4583 friend class ArgumentPackSubstitutionRAII; 4584 4585 /// \brief The stack of calls expression undergoing template instantiation. 4586 /// 4587 /// The top of this stack is used by a fixit instantiating unresolved 4588 /// function calls to fix the AST to match the textual change it prints. 4589 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4590 4591 /// \brief For each declaration that involved template argument deduction, the 4592 /// set of diagnostics that were suppressed during that template argument 4593 /// deduction. 4594 /// 4595 /// FIXME: Serialize this structure to the AST file. 4596 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 4597 SuppressedDiagnostics; 4598 4599 /// \brief A stack object to be created when performing template 4600 /// instantiation. 4601 /// 4602 /// Construction of an object of type \c InstantiatingTemplate 4603 /// pushes the current instantiation onto the stack of active 4604 /// instantiations. If the size of this stack exceeds the maximum 4605 /// number of recursive template instantiations, construction 4606 /// produces an error and evaluates true. 4607 /// 4608 /// Destruction of this object will pop the named instantiation off 4609 /// the stack. 4610 struct InstantiatingTemplate { 4611 /// \brief Note that we are instantiating a class template, 4612 /// function template, or a member thereof. 4613 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4614 Decl *Entity, 4615 SourceRange InstantiationRange = SourceRange()); 4616 4617 /// \brief Note that we are instantiating a default argument in a 4618 /// template-id. 4619 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4620 TemplateDecl *Template, 4621 const TemplateArgument *TemplateArgs, 4622 unsigned NumTemplateArgs, 4623 SourceRange InstantiationRange = SourceRange()); 4624 4625 /// \brief Note that we are instantiating a default argument in a 4626 /// template-id. 4627 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4628 FunctionTemplateDecl *FunctionTemplate, 4629 const TemplateArgument *TemplateArgs, 4630 unsigned NumTemplateArgs, 4631 ActiveTemplateInstantiation::InstantiationKind Kind, 4632 sema::TemplateDeductionInfo &DeductionInfo, 4633 SourceRange InstantiationRange = SourceRange()); 4634 4635 /// \brief Note that we are instantiating as part of template 4636 /// argument deduction for a class template partial 4637 /// specialization. 4638 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4639 ClassTemplatePartialSpecializationDecl *PartialSpec, 4640 const TemplateArgument *TemplateArgs, 4641 unsigned NumTemplateArgs, 4642 sema::TemplateDeductionInfo &DeductionInfo, 4643 SourceRange InstantiationRange = SourceRange()); 4644 4645 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4646 ParmVarDecl *Param, 4647 const TemplateArgument *TemplateArgs, 4648 unsigned NumTemplateArgs, 4649 SourceRange InstantiationRange = SourceRange()); 4650 4651 /// \brief Note that we are substituting prior template arguments into a 4652 /// non-type or template template parameter. 4653 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4654 NamedDecl *Template, 4655 NonTypeTemplateParmDecl *Param, 4656 const TemplateArgument *TemplateArgs, 4657 unsigned NumTemplateArgs, 4658 SourceRange InstantiationRange); 4659 4660 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4661 NamedDecl *Template, 4662 TemplateTemplateParmDecl *Param, 4663 const TemplateArgument *TemplateArgs, 4664 unsigned NumTemplateArgs, 4665 SourceRange InstantiationRange); 4666 4667 /// \brief Note that we are checking the default template argument 4668 /// against the template parameter for a given template-id. 4669 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4670 TemplateDecl *Template, 4671 NamedDecl *Param, 4672 const TemplateArgument *TemplateArgs, 4673 unsigned NumTemplateArgs, 4674 SourceRange InstantiationRange); 4675 4676 4677 /// \brief Note that we have finished instantiating this template. 4678 void Clear(); 4679 4680 ~InstantiatingTemplate() { Clear(); } 4681 4682 /// \brief Determines whether we have exceeded the maximum 4683 /// recursive template instantiations. 4684 operator bool() const { return Invalid; } 4685 4686 private: 4687 Sema &SemaRef; 4688 bool Invalid; 4689 bool SavedInNonInstantiationSFINAEContext; 4690 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4691 SourceRange InstantiationRange); 4692 4693 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4694 4695 InstantiatingTemplate& 4696 operator=(const InstantiatingTemplate&); // not implemented 4697 }; 4698 4699 void PrintInstantiationStack(); 4700 4701 /// \brief Determines whether we are currently in a context where 4702 /// template argument substitution failures are not considered 4703 /// errors. 4704 /// 4705 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4706 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4707 /// template-deduction context object, which can be used to capture 4708 /// diagnostics that will be suppressed. 4709 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4710 4711 /// \brief RAII class used to determine whether SFINAE has 4712 /// trapped any errors that occur during template argument 4713 /// deduction.` 4714 class SFINAETrap { 4715 Sema &SemaRef; 4716 unsigned PrevSFINAEErrors; 4717 bool PrevInNonInstantiationSFINAEContext; 4718 bool PrevAccessCheckingSFINAE; 4719 4720 public: 4721 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 4722 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 4723 PrevInNonInstantiationSFINAEContext( 4724 SemaRef.InNonInstantiationSFINAEContext), 4725 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 4726 { 4727 if (!SemaRef.isSFINAEContext()) 4728 SemaRef.InNonInstantiationSFINAEContext = true; 4729 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 4730 } 4731 4732 ~SFINAETrap() { 4733 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 4734 SemaRef.InNonInstantiationSFINAEContext 4735 = PrevInNonInstantiationSFINAEContext; 4736 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 4737 } 4738 4739 /// \brief Determine whether any SFINAE errors have been trapped. 4740 bool hasErrorOccurred() const { 4741 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 4742 } 4743 }; 4744 4745 /// \brief The current instantiation scope used to store local 4746 /// variables. 4747 LocalInstantiationScope *CurrentInstantiationScope; 4748 4749 /// \brief The number of typos corrected by CorrectTypo. 4750 unsigned TyposCorrected; 4751 4752 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 4753 UnqualifiedTyposCorrectedMap; 4754 4755 /// \brief A cache containing the results of typo correction for unqualified 4756 /// name lookup. 4757 /// 4758 /// The string is the string that we corrected to (which may be empty, if 4759 /// there was no correction), while the boolean will be true when the 4760 /// string represents a keyword. 4761 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 4762 4763 /// \brief Worker object for performing CFG-based warnings. 4764 sema::AnalysisBasedWarnings AnalysisWarnings; 4765 4766 /// \brief An entity for which implicit template instantiation is required. 4767 /// 4768 /// The source location associated with the declaration is the first place in 4769 /// the source code where the declaration was "used". It is not necessarily 4770 /// the point of instantiation (which will be either before or after the 4771 /// namespace-scope declaration that triggered this implicit instantiation), 4772 /// However, it is the location that diagnostics should generally refer to, 4773 /// because users will need to know what code triggered the instantiation. 4774 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 4775 4776 /// \brief The queue of implicit template instantiations that are required 4777 /// but have not yet been performed. 4778 std::deque<PendingImplicitInstantiation> PendingInstantiations; 4779 4780 /// \brief The queue of implicit template instantiations that are required 4781 /// and must be performed within the current local scope. 4782 /// 4783 /// This queue is only used for member functions of local classes in 4784 /// templates, which must be instantiated in the same scope as their 4785 /// enclosing function, so that they can reference function-local 4786 /// types, static variables, enumerators, etc. 4787 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 4788 4789 void PerformPendingInstantiations(bool LocalOnly = false); 4790 4791 TypeSourceInfo *SubstType(TypeSourceInfo *T, 4792 const MultiLevelTemplateArgumentList &TemplateArgs, 4793 SourceLocation Loc, DeclarationName Entity); 4794 4795 QualType SubstType(QualType T, 4796 const MultiLevelTemplateArgumentList &TemplateArgs, 4797 SourceLocation Loc, DeclarationName Entity); 4798 4799 TypeSourceInfo *SubstType(TypeLoc TL, 4800 const MultiLevelTemplateArgumentList &TemplateArgs, 4801 SourceLocation Loc, DeclarationName Entity); 4802 4803 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 4804 const MultiLevelTemplateArgumentList &TemplateArgs, 4805 SourceLocation Loc, 4806 DeclarationName Entity); 4807 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 4808 const MultiLevelTemplateArgumentList &TemplateArgs, 4809 int indexAdjustment, 4810 llvm::Optional<unsigned> NumExpansions); 4811 bool SubstParmTypes(SourceLocation Loc, 4812 ParmVarDecl **Params, unsigned NumParams, 4813 const MultiLevelTemplateArgumentList &TemplateArgs, 4814 SmallVectorImpl<QualType> &ParamTypes, 4815 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 4816 ExprResult SubstExpr(Expr *E, 4817 const MultiLevelTemplateArgumentList &TemplateArgs); 4818 4819 /// \brief Substitute the given template arguments into a list of 4820 /// expressions, expanding pack expansions if required. 4821 /// 4822 /// \param Exprs The list of expressions to substitute into. 4823 /// 4824 /// \param NumExprs The number of expressions in \p Exprs. 4825 /// 4826 /// \param IsCall Whether this is some form of call, in which case 4827 /// default arguments will be dropped. 4828 /// 4829 /// \param TemplateArgs The set of template arguments to substitute. 4830 /// 4831 /// \param Outputs Will receive all of the substituted arguments. 4832 /// 4833 /// \returns true if an error occurred, false otherwise. 4834 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 4835 const MultiLevelTemplateArgumentList &TemplateArgs, 4836 SmallVectorImpl<Expr *> &Outputs); 4837 4838 StmtResult SubstStmt(Stmt *S, 4839 const MultiLevelTemplateArgumentList &TemplateArgs); 4840 4841 Decl *SubstDecl(Decl *D, DeclContext *Owner, 4842 const MultiLevelTemplateArgumentList &TemplateArgs); 4843 4844 bool 4845 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 4846 CXXRecordDecl *Pattern, 4847 const MultiLevelTemplateArgumentList &TemplateArgs); 4848 4849 bool 4850 InstantiateClass(SourceLocation PointOfInstantiation, 4851 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 4852 const MultiLevelTemplateArgumentList &TemplateArgs, 4853 TemplateSpecializationKind TSK, 4854 bool Complain = true); 4855 4856 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 4857 const Decl *Pattern, Decl *Inst); 4858 4859 bool 4860 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 4861 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4862 TemplateSpecializationKind TSK, 4863 bool Complain = true); 4864 4865 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 4866 CXXRecordDecl *Instantiation, 4867 const MultiLevelTemplateArgumentList &TemplateArgs, 4868 TemplateSpecializationKind TSK); 4869 4870 void InstantiateClassTemplateSpecializationMembers( 4871 SourceLocation PointOfInstantiation, 4872 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4873 TemplateSpecializationKind TSK); 4874 4875 NestedNameSpecifierLoc 4876 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 4877 const MultiLevelTemplateArgumentList &TemplateArgs); 4878 4879 DeclarationNameInfo 4880 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 4881 const MultiLevelTemplateArgumentList &TemplateArgs); 4882 TemplateName 4883 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 4884 SourceLocation Loc, 4885 const MultiLevelTemplateArgumentList &TemplateArgs); 4886 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 4887 TemplateArgumentListInfo &Result, 4888 const MultiLevelTemplateArgumentList &TemplateArgs); 4889 4890 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 4891 FunctionDecl *Function, 4892 bool Recursive = false, 4893 bool DefinitionRequired = false); 4894 void InstantiateStaticDataMemberDefinition( 4895 SourceLocation PointOfInstantiation, 4896 VarDecl *Var, 4897 bool Recursive = false, 4898 bool DefinitionRequired = false); 4899 4900 void InstantiateMemInitializers(CXXConstructorDecl *New, 4901 const CXXConstructorDecl *Tmpl, 4902 const MultiLevelTemplateArgumentList &TemplateArgs); 4903 bool InstantiateInitializer(Expr *Init, 4904 const MultiLevelTemplateArgumentList &TemplateArgs, 4905 SourceLocation &LParenLoc, 4906 ASTOwningVector<Expr*> &NewArgs, 4907 SourceLocation &RParenLoc); 4908 4909 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 4910 const MultiLevelTemplateArgumentList &TemplateArgs); 4911 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 4912 const MultiLevelTemplateArgumentList &TemplateArgs); 4913 4914 // Objective-C declarations. 4915 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 4916 IdentifierInfo *ClassName, 4917 SourceLocation ClassLoc, 4918 IdentifierInfo *SuperName, 4919 SourceLocation SuperLoc, 4920 Decl * const *ProtoRefs, 4921 unsigned NumProtoRefs, 4922 const SourceLocation *ProtoLocs, 4923 SourceLocation EndProtoLoc, 4924 AttributeList *AttrList); 4925 4926 Decl *ActOnCompatiblityAlias( 4927 SourceLocation AtCompatibilityAliasLoc, 4928 IdentifierInfo *AliasName, SourceLocation AliasLocation, 4929 IdentifierInfo *ClassName, SourceLocation ClassLocation); 4930 4931 bool CheckForwardProtocolDeclarationForCircularDependency( 4932 IdentifierInfo *PName, 4933 SourceLocation &PLoc, SourceLocation PrevLoc, 4934 const ObjCList<ObjCProtocolDecl> &PList); 4935 4936 Decl *ActOnStartProtocolInterface( 4937 SourceLocation AtProtoInterfaceLoc, 4938 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 4939 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 4940 const SourceLocation *ProtoLocs, 4941 SourceLocation EndProtoLoc, 4942 AttributeList *AttrList); 4943 4944 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 4945 IdentifierInfo *ClassName, 4946 SourceLocation ClassLoc, 4947 IdentifierInfo *CategoryName, 4948 SourceLocation CategoryLoc, 4949 Decl * const *ProtoRefs, 4950 unsigned NumProtoRefs, 4951 const SourceLocation *ProtoLocs, 4952 SourceLocation EndProtoLoc); 4953 4954 Decl *ActOnStartClassImplementation( 4955 SourceLocation AtClassImplLoc, 4956 IdentifierInfo *ClassName, SourceLocation ClassLoc, 4957 IdentifierInfo *SuperClassname, 4958 SourceLocation SuperClassLoc); 4959 4960 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 4961 IdentifierInfo *ClassName, 4962 SourceLocation ClassLoc, 4963 IdentifierInfo *CatName, 4964 SourceLocation CatLoc); 4965 4966 Decl *ActOnForwardClassDeclaration(SourceLocation Loc, 4967 IdentifierInfo **IdentList, 4968 SourceLocation *IdentLocs, 4969 unsigned NumElts); 4970 4971 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 4972 const IdentifierLocPair *IdentList, 4973 unsigned NumElts, 4974 AttributeList *attrList); 4975 4976 void FindProtocolDeclaration(bool WarnOnDeclarations, 4977 const IdentifierLocPair *ProtocolId, 4978 unsigned NumProtocols, 4979 SmallVectorImpl<Decl *> &Protocols); 4980 4981 /// Ensure attributes are consistent with type. 4982 /// \param [in, out] Attributes The attributes to check; they will 4983 /// be modified to be consistent with \arg PropertyTy. 4984 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 4985 SourceLocation Loc, 4986 unsigned &Attributes); 4987 4988 /// Process the specified property declaration and create decls for the 4989 /// setters and getters as needed. 4990 /// \param property The property declaration being processed 4991 /// \param DC The semantic container for the property 4992 /// \param redeclaredProperty Declaration for property if redeclared 4993 /// in class extension. 4994 /// \param lexicalDC Container for redeclaredProperty. 4995 void ProcessPropertyDecl(ObjCPropertyDecl *property, 4996 ObjCContainerDecl *DC, 4997 ObjCPropertyDecl *redeclaredProperty = 0, 4998 ObjCContainerDecl *lexicalDC = 0); 4999 5000 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5001 ObjCPropertyDecl *SuperProperty, 5002 const IdentifierInfo *Name); 5003 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5004 5005 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5006 ObjCMethodDecl *MethodDecl, 5007 bool IsInstance); 5008 5009 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5010 5011 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5012 ObjCInterfaceDecl *ID); 5013 5014 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5015 ObjCProtocolDecl *PDecl); 5016 5017 void ActOnAtEnd(Scope *S, SourceRange AtEnd, Decl *classDecl, 5018 Decl **allMethods = 0, unsigned allNum = 0, 5019 Decl **allProperties = 0, unsigned pNum = 0, 5020 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5021 5022 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5023 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5024 Selector GetterSel, Selector SetterSel, 5025 Decl *ClassCategory, 5026 bool *OverridingProperty, 5027 tok::ObjCKeywordKind MethodImplKind, 5028 DeclContext *lexicalDC = 0); 5029 5030 Decl *ActOnPropertyImplDecl(Scope *S, 5031 SourceLocation AtLoc, 5032 SourceLocation PropertyLoc, 5033 bool ImplKind,Decl *ClassImplDecl, 5034 IdentifierInfo *PropertyId, 5035 IdentifierInfo *PropertyIvar, 5036 SourceLocation PropertyIvarLoc); 5037 5038 enum ObjCSpecialMethodKind { 5039 OSMK_None, 5040 OSMK_Alloc, 5041 OSMK_New, 5042 OSMK_Copy, 5043 OSMK_RetainingInit, 5044 OSMK_NonRetainingInit 5045 }; 5046 5047 struct ObjCArgInfo { 5048 IdentifierInfo *Name; 5049 SourceLocation NameLoc; 5050 // The Type is null if no type was specified, and the DeclSpec is invalid 5051 // in this case. 5052 ParsedType Type; 5053 ObjCDeclSpec DeclSpec; 5054 5055 /// ArgAttrs - Attribute list for this argument. 5056 AttributeList *ArgAttrs; 5057 }; 5058 5059 Decl *ActOnMethodDeclaration( 5060 Scope *S, 5061 SourceLocation BeginLoc, // location of the + or -. 5062 SourceLocation EndLoc, // location of the ; or {. 5063 tok::TokenKind MethodType, 5064 Decl *ClassDecl, ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5065 SourceLocation SelectorStartLoc, Selector Sel, 5066 // optional arguments. The number of types/arguments is obtained 5067 // from the Sel.getNumArgs(). 5068 ObjCArgInfo *ArgInfo, 5069 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5070 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5071 bool isVariadic, bool MethodDefinition); 5072 5073 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5074 // Will search "local" class/category implementations for a method decl. 5075 // Will also search in class's root looking for instance method. 5076 // Returns 0 if no method is found. 5077 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5078 ObjCInterfaceDecl *CDecl); 5079 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5080 ObjCInterfaceDecl *ClassDecl); 5081 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5082 const ObjCObjectPointerType *OPT, 5083 bool IsInstance); 5084 5085 bool inferObjCARCLifetime(ValueDecl *decl); 5086 5087 ExprResult 5088 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5089 Expr *BaseExpr, 5090 SourceLocation OpLoc, 5091 DeclarationName MemberName, 5092 SourceLocation MemberLoc, 5093 SourceLocation SuperLoc, QualType SuperType, 5094 bool Super); 5095 5096 ExprResult 5097 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5098 IdentifierInfo &propertyName, 5099 SourceLocation receiverNameLoc, 5100 SourceLocation propertyNameLoc); 5101 5102 ObjCMethodDecl *tryCaptureObjCSelf(); 5103 5104 /// \brief Describes the kind of message expression indicated by a message 5105 /// send that starts with an identifier. 5106 enum ObjCMessageKind { 5107 /// \brief The message is sent to 'super'. 5108 ObjCSuperMessage, 5109 /// \brief The message is an instance message. 5110 ObjCInstanceMessage, 5111 /// \brief The message is a class message, and the identifier is a type 5112 /// name. 5113 ObjCClassMessage 5114 }; 5115 5116 ObjCMessageKind getObjCMessageKind(Scope *S, 5117 IdentifierInfo *Name, 5118 SourceLocation NameLoc, 5119 bool IsSuper, 5120 bool HasTrailingDot, 5121 ParsedType &ReceiverType); 5122 5123 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5124 Selector Sel, 5125 SourceLocation LBracLoc, 5126 SourceLocation SelectorLoc, 5127 SourceLocation RBracLoc, 5128 MultiExprArg Args); 5129 5130 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5131 QualType ReceiverType, 5132 SourceLocation SuperLoc, 5133 Selector Sel, 5134 ObjCMethodDecl *Method, 5135 SourceLocation LBracLoc, 5136 SourceLocation SelectorLoc, 5137 SourceLocation RBracLoc, 5138 MultiExprArg Args); 5139 5140 ExprResult ActOnClassMessage(Scope *S, 5141 ParsedType Receiver, 5142 Selector Sel, 5143 SourceLocation LBracLoc, 5144 SourceLocation SelectorLoc, 5145 SourceLocation RBracLoc, 5146 MultiExprArg Args); 5147 5148 ExprResult BuildInstanceMessage(Expr *Receiver, 5149 QualType ReceiverType, 5150 SourceLocation SuperLoc, 5151 Selector Sel, 5152 ObjCMethodDecl *Method, 5153 SourceLocation LBracLoc, 5154 SourceLocation SelectorLoc, 5155 SourceLocation RBracLoc, 5156 MultiExprArg Args); 5157 5158 ExprResult ActOnInstanceMessage(Scope *S, 5159 Expr *Receiver, 5160 Selector Sel, 5161 SourceLocation LBracLoc, 5162 SourceLocation SelectorLoc, 5163 SourceLocation RBracLoc, 5164 MultiExprArg Args); 5165 5166 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5167 ObjCBridgeCastKind Kind, 5168 SourceLocation BridgeKeywordLoc, 5169 TypeSourceInfo *TSInfo, 5170 Expr *SubExpr); 5171 5172 ExprResult ActOnObjCBridgedCast(Scope *S, 5173 SourceLocation LParenLoc, 5174 ObjCBridgeCastKind Kind, 5175 SourceLocation BridgeKeywordLoc, 5176 ParsedType Type, 5177 SourceLocation RParenLoc, 5178 Expr *SubExpr); 5179 5180 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5181 5182 /// \brief Check whether the given new method is a valid override of the 5183 /// given overridden method, and set any properties that should be inherited. 5184 /// 5185 /// \returns True if an error occurred. 5186 bool CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5187 const ObjCMethodDecl *Overridden, 5188 bool IsImplementation); 5189 5190 /// \brief Check whether the given method overrides any methods in its class, 5191 /// calling \c CheckObjCMethodOverride for each overridden method. 5192 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5193 5194 enum PragmaOptionsAlignKind { 5195 POAK_Native, // #pragma options align=native 5196 POAK_Natural, // #pragma options align=natural 5197 POAK_Packed, // #pragma options align=packed 5198 POAK_Power, // #pragma options align=power 5199 POAK_Mac68k, // #pragma options align=mac68k 5200 POAK_Reset // #pragma options align=reset 5201 }; 5202 5203 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5204 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5205 SourceLocation PragmaLoc, 5206 SourceLocation KindLoc); 5207 5208 enum PragmaPackKind { 5209 PPK_Default, // #pragma pack([n]) 5210 PPK_Show, // #pragma pack(show), only supported by MSVC. 5211 PPK_Push, // #pragma pack(push, [identifier], [n]) 5212 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5213 }; 5214 5215 enum PragmaMSStructKind { 5216 PMSST_OFF, // #pragms ms_struct off 5217 PMSST_ON // #pragms ms_struct on 5218 }; 5219 5220 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5221 void ActOnPragmaPack(PragmaPackKind Kind, 5222 IdentifierInfo *Name, 5223 Expr *Alignment, 5224 SourceLocation PragmaLoc, 5225 SourceLocation LParenLoc, 5226 SourceLocation RParenLoc); 5227 5228 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5229 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5230 5231 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5232 void ActOnPragmaUnused(const Token &Identifier, 5233 Scope *curScope, 5234 SourceLocation PragmaLoc); 5235 5236 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5237 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 5238 SourceLocation PragmaLoc); 5239 5240 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II); 5241 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5242 5243 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5244 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5245 SourceLocation PragmaLoc, 5246 SourceLocation WeakNameLoc); 5247 5248 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5249 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5250 IdentifierInfo* AliasName, 5251 SourceLocation PragmaLoc, 5252 SourceLocation WeakNameLoc, 5253 SourceLocation AliasNameLoc); 5254 5255 /// ActOnPragmaFPContract - Called on well formed 5256 /// #pragma {STDC,OPENCL} FP_CONTRACT 5257 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5258 5259 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5260 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5261 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5262 5263 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5264 void AddMsStructLayoutForRecord(RecordDecl *RD); 5265 5266 /// FreePackedContext - Deallocate and null out PackContext. 5267 void FreePackedContext(); 5268 5269 /// PushNamespaceVisibilityAttr - Note that we've entered a 5270 /// namespace with a visibility attribute. 5271 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 5272 5273 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5274 /// add an appropriate visibility attribute. 5275 void AddPushedVisibilityAttribute(Decl *RD); 5276 5277 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5278 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5279 void PopPragmaVisibility(); 5280 5281 /// FreeVisContext - Deallocate and null out VisContext. 5282 void FreeVisContext(); 5283 5284 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5285 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, Expr *E); 5286 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, TypeSourceInfo *T); 5287 5288 /// CastCategory - Get the correct forwarded implicit cast result category 5289 /// from the inner expression. 5290 ExprValueKind CastCategory(Expr *E); 5291 5292 /// \brief The kind of conversion being performed. 5293 enum CheckedConversionKind { 5294 /// \brief An implicit conversion. 5295 CCK_ImplicitConversion, 5296 /// \brief A C-style cast. 5297 CCK_CStyleCast, 5298 /// \brief A functional-style cast. 5299 CCK_FunctionalCast, 5300 /// \brief A cast other than a C-style cast. 5301 CCK_OtherCast 5302 }; 5303 5304 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5305 /// cast. If there is already an implicit cast, merge into the existing one. 5306 /// If isLvalue, the result of the cast is an lvalue. 5307 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5308 ExprValueKind VK = VK_RValue, 5309 const CXXCastPath *BasePath = 0, 5310 CheckedConversionKind CCK 5311 = CCK_ImplicitConversion); 5312 5313 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5314 /// to the conversion from scalar type ScalarTy to the Boolean type. 5315 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5316 5317 /// IgnoredValueConversions - Given that an expression's result is 5318 /// syntactically ignored, perform any conversions that are 5319 /// required. 5320 ExprResult IgnoredValueConversions(Expr *E); 5321 5322 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5323 // functions and arrays to their respective pointers (C99 6.3.2.1). 5324 ExprResult UsualUnaryConversions(Expr *E); 5325 5326 // DefaultFunctionArrayConversion - converts functions and arrays 5327 // to their respective pointers (C99 6.3.2.1). 5328 ExprResult DefaultFunctionArrayConversion(Expr *E); 5329 5330 // DefaultFunctionArrayLvalueConversion - converts functions and 5331 // arrays to their respective pointers and performs the 5332 // lvalue-to-rvalue conversion. 5333 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5334 5335 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5336 // the operand. This is DefaultFunctionArrayLvalueConversion, 5337 // except that it assumes the operand isn't of function or array 5338 // type. 5339 ExprResult DefaultLvalueConversion(Expr *E); 5340 5341 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5342 // do not have a prototype. Integer promotions are performed on each 5343 // argument, and arguments that have type float are promoted to double. 5344 ExprResult DefaultArgumentPromotion(Expr *E); 5345 5346 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5347 enum VariadicCallType { 5348 VariadicFunction, 5349 VariadicBlock, 5350 VariadicMethod, 5351 VariadicConstructor, 5352 VariadicDoesNotApply 5353 }; 5354 5355 /// GatherArgumentsForCall - Collector argument expressions for various 5356 /// form of call prototypes. 5357 bool GatherArgumentsForCall(SourceLocation CallLoc, 5358 FunctionDecl *FDecl, 5359 const FunctionProtoType *Proto, 5360 unsigned FirstProtoArg, 5361 Expr **Args, unsigned NumArgs, 5362 SmallVector<Expr *, 8> &AllArgs, 5363 VariadicCallType CallType = VariadicDoesNotApply); 5364 5365 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5366 // will warn if the resulting type is not a POD type. 5367 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5368 FunctionDecl *FDecl); 5369 5370 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5371 // operands and then handles various conversions that are common to binary 5372 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5373 // routine returns the first non-arithmetic type found. The client is 5374 // responsible for emitting appropriate error diagnostics. 5375 QualType UsualArithmeticConversions(ExprResult &lExpr, ExprResult &rExpr, 5376 bool isCompAssign = false); 5377 5378 /// AssignConvertType - All of the 'assignment' semantic checks return this 5379 /// enum to indicate whether the assignment was allowed. These checks are 5380 /// done for simple assignments, as well as initialization, return from 5381 /// function, argument passing, etc. The query is phrased in terms of a 5382 /// source and destination type. 5383 enum AssignConvertType { 5384 /// Compatible - the types are compatible according to the standard. 5385 Compatible, 5386 5387 /// PointerToInt - The assignment converts a pointer to an int, which we 5388 /// accept as an extension. 5389 PointerToInt, 5390 5391 /// IntToPointer - The assignment converts an int to a pointer, which we 5392 /// accept as an extension. 5393 IntToPointer, 5394 5395 /// FunctionVoidPointer - The assignment is between a function pointer and 5396 /// void*, which the standard doesn't allow, but we accept as an extension. 5397 FunctionVoidPointer, 5398 5399 /// IncompatiblePointer - The assignment is between two pointers types that 5400 /// are not compatible, but we accept them as an extension. 5401 IncompatiblePointer, 5402 5403 /// IncompatiblePointer - The assignment is between two pointers types which 5404 /// point to integers which have a different sign, but are otherwise identical. 5405 /// This is a subset of the above, but broken out because it's by far the most 5406 /// common case of incompatible pointers. 5407 IncompatiblePointerSign, 5408 5409 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5410 /// c/v/r qualifiers, which we accept as an extension. 5411 CompatiblePointerDiscardsQualifiers, 5412 5413 /// IncompatiblePointerDiscardsQualifiers - The assignment 5414 /// discards qualifiers that we don't permit to be discarded, 5415 /// like address spaces. 5416 IncompatiblePointerDiscardsQualifiers, 5417 5418 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5419 /// nested pointer types, and the qualifiers other than the first two 5420 /// levels differ e.g. char ** -> const char **, but we accept them as an 5421 /// extension. 5422 IncompatibleNestedPointerQualifiers, 5423 5424 /// IncompatibleVectors - The assignment is between two vector types that 5425 /// have the same size, which we accept as an extension. 5426 IncompatibleVectors, 5427 5428 /// IntToBlockPointer - The assignment converts an int to a block 5429 /// pointer. We disallow this. 5430 IntToBlockPointer, 5431 5432 /// IncompatibleBlockPointer - The assignment is between two block 5433 /// pointers types that are not compatible. 5434 IncompatibleBlockPointer, 5435 5436 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5437 /// id type and something else (that is incompatible with it). For example, 5438 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5439 IncompatibleObjCQualifiedId, 5440 5441 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 5442 /// object with __weak qualifier. 5443 IncompatibleObjCWeakRef, 5444 5445 /// Incompatible - We reject this conversion outright, it is invalid to 5446 /// represent it in the AST. 5447 Incompatible 5448 }; 5449 5450 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5451 /// assignment conversion type specified by ConvTy. This returns true if the 5452 /// conversion was invalid or false if the conversion was accepted. 5453 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5454 SourceLocation Loc, 5455 QualType DstType, QualType SrcType, 5456 Expr *SrcExpr, AssignmentAction Action, 5457 bool *Complained = 0); 5458 5459 /// CheckAssignmentConstraints - Perform type checking for assignment, 5460 /// argument passing, variable initialization, and function return values. 5461 /// C99 6.5.16. 5462 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5463 QualType lhs, QualType rhs); 5464 5465 /// Check assignment constraints and prepare for a conversion of the 5466 /// RHS to the LHS type. 5467 AssignConvertType CheckAssignmentConstraints(QualType lhs, ExprResult &rhs, 5468 CastKind &Kind); 5469 5470 // CheckSingleAssignmentConstraints - Currently used by 5471 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5472 // this routine performs the default function/array converions. 5473 AssignConvertType CheckSingleAssignmentConstraints(QualType lhs, 5474 ExprResult &rExprRes); 5475 5476 // \brief If the lhs type is a transparent union, check whether we 5477 // can initialize the transparent union with the given expression. 5478 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType lhs, 5479 ExprResult &rExpr); 5480 5481 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5482 5483 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5484 5485 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5486 AssignmentAction Action, 5487 bool AllowExplicit = false); 5488 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5489 AssignmentAction Action, 5490 bool AllowExplicit, 5491 ImplicitConversionSequence& ICS); 5492 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5493 const ImplicitConversionSequence& ICS, 5494 AssignmentAction Action, 5495 CheckedConversionKind CCK 5496 = CCK_ImplicitConversion); 5497 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5498 const StandardConversionSequence& SCS, 5499 AssignmentAction Action, 5500 CheckedConversionKind CCK); 5501 5502 /// the following "Check" methods will return a valid/converted QualType 5503 /// or a null QualType (indicating an error diagnostic was issued). 5504 5505 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5506 QualType InvalidOperands(SourceLocation l, ExprResult &lex, ExprResult &rex); 5507 QualType CheckPointerToMemberOperands( // C++ 5.5 5508 ExprResult &lex, ExprResult &rex, ExprValueKind &VK, 5509 SourceLocation OpLoc, bool isIndirect); 5510 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5511 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign, 5512 bool isDivide); 5513 QualType CheckRemainderOperands( // C99 6.5.5 5514 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 5515 QualType CheckAdditionOperands( // C99 6.5.6 5516 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 5517 QualType CheckSubtractionOperands( // C99 6.5.6 5518 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 5519 QualType CheckShiftOperands( // C99 6.5.7 5520 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 5521 bool isCompAssign = false); 5522 QualType CheckCompareOperands( // C99 6.5.8/9 5523 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 5524 bool isRelational); 5525 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 5526 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 5527 QualType CheckLogicalOperands( // C99 6.5.[13,14] 5528 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc); 5529 // CheckAssignmentOperands is used for both simple and compound assignment. 5530 // For simple assignment, pass both expressions and a null converted type. 5531 // For compound assignment, pass both expressions and the converted type. 5532 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 5533 Expr *lex, ExprResult &rex, SourceLocation OpLoc, QualType convertedType); 5534 5535 void ConvertPropertyForLValue(ExprResult &LHS, ExprResult &RHS, QualType& LHSTy); 5536 ExprResult ConvertPropertyForRValue(Expr *E); 5537 5538 QualType CheckConditionalOperands( // C99 6.5.15 5539 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5540 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5541 QualType CXXCheckConditionalOperands( // C++ 5.16 5542 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5543 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5544 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 5545 bool *NonStandardCompositeType = 0); 5546 QualType FindCompositePointerType(SourceLocation Loc, ExprResult &E1, ExprResult &E2, 5547 bool *NonStandardCompositeType = 0) { 5548 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 5549 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, NonStandardCompositeType); 5550 E1 = Owned(E1Tmp); 5551 E2 = Owned(E2Tmp); 5552 return Composite; 5553 } 5554 5555 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5556 SourceLocation questionLoc); 5557 5558 bool DiagnoseConditionalForNull(Expr *LHS, Expr *RHS, 5559 SourceLocation QuestionLoc); 5560 5561 /// type checking for vector binary operators. 5562 QualType CheckVectorOperands(ExprResult &lex, ExprResult &rex, 5563 SourceLocation Loc, bool isCompAssign); 5564 QualType CheckVectorCompareOperands(ExprResult &lex, ExprResult &rx, 5565 SourceLocation l, bool isRel); 5566 5567 /// type checking declaration initializers (C99 6.7.8) 5568 bool CheckInitList(const InitializedEntity &Entity, 5569 InitListExpr *&InitList, QualType &DeclType); 5570 bool CheckForConstantInitializer(Expr *e, QualType t); 5571 5572 // type checking C++ declaration initializers (C++ [dcl.init]). 5573 5574 /// ReferenceCompareResult - Expresses the result of comparing two 5575 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5576 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5577 enum ReferenceCompareResult { 5578 /// Ref_Incompatible - The two types are incompatible, so direct 5579 /// reference binding is not possible. 5580 Ref_Incompatible = 0, 5581 /// Ref_Related - The two types are reference-related, which means 5582 /// that their unqualified forms (T1 and T2) are either the same 5583 /// or T1 is a base class of T2. 5584 Ref_Related, 5585 /// Ref_Compatible_With_Added_Qualification - The two types are 5586 /// reference-compatible with added qualification, meaning that 5587 /// they are reference-compatible and the qualifiers on T1 (cv1) 5588 /// are greater than the qualifiers on T2 (cv2). 5589 Ref_Compatible_With_Added_Qualification, 5590 /// Ref_Compatible - The two types are reference-compatible and 5591 /// have equivalent qualifiers (cv1 == cv2). 5592 Ref_Compatible 5593 }; 5594 5595 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 5596 QualType T1, QualType T2, 5597 bool &DerivedToBase, 5598 bool &ObjCConversion, 5599 bool &ObjCLifetimeConversion); 5600 5601 /// CheckCastTypes - Check type constraints for casting between types under 5602 /// C semantics, or forward to CXXCheckCStyleCast in C++. 5603 ExprResult CheckCastTypes(SourceLocation CastStartLoc, SourceRange TyRange, 5604 QualType CastTy, Expr *CastExpr, CastKind &Kind, 5605 ExprValueKind &VK, CXXCastPath &BasePath, 5606 bool FunctionalStyle = false); 5607 5608 ExprResult checkUnknownAnyCast(SourceRange TyRange, QualType castType, 5609 Expr *castExpr, CastKind &castKind, 5610 ExprValueKind &valueKind, CXXCastPath &BasePath); 5611 5612 // CheckVectorCast - check type constraints for vectors. 5613 // Since vectors are an extension, there are no C standard reference for this. 5614 // We allow casting between vectors and integer datatypes of the same size. 5615 // returns true if the cast is invalid 5616 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 5617 CastKind &Kind); 5618 5619 // CheckExtVectorCast - check type constraints for extended vectors. 5620 // Since vectors are an extension, there are no C standard reference for this. 5621 // We allow casting between vectors and integer datatypes of the same size, 5622 // or vectors and the element type of that vector. 5623 // returns the cast expr 5624 ExprResult CheckExtVectorCast(SourceRange R, QualType VectorTy, Expr *CastExpr, 5625 CastKind &Kind); 5626 5627 /// CXXCheckCStyleCast - Check constraints of a C-style or function-style 5628 /// cast under C++ semantics. 5629 ExprResult CXXCheckCStyleCast(SourceRange R, QualType CastTy, ExprValueKind &VK, 5630 Expr *CastExpr, CastKind &Kind, 5631 CXXCastPath &BasePath, bool FunctionalStyle); 5632 5633 /// \brief Checks for valid expressions which can be cast to an ObjC 5634 /// pointer without needing a bridge cast. 5635 bool ValidObjCARCNoBridgeCastExpr(Expr *&Exp, QualType castType); 5636 5637 /// \brief Checks for invalid conversions and casts between 5638 /// retainable pointers and other pointer kinds. 5639 void CheckObjCARCConversion(SourceRange castRange, QualType castType, 5640 Expr *&op, CheckedConversionKind CCK); 5641 5642 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 5643 QualType ExprType); 5644 5645 /// checkRetainCycles - Check whether an Objective-C message send 5646 /// might create an obvious retain cycle. 5647 void checkRetainCycles(ObjCMessageExpr *msg); 5648 void checkRetainCycles(Expr *receiver, Expr *argument); 5649 5650 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 5651 /// to weak/__unsafe_unretained type. 5652 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 5653 5654 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 5655 /// to weak/__unsafe_unretained expression. 5656 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 5657 5658 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 5659 /// \param Method - May be null. 5660 /// \param [out] ReturnType - The return type of the send. 5661 /// \return true iff there were any incompatible types. 5662 bool CheckMessageArgumentTypes(QualType ReceiverType, 5663 Expr **Args, unsigned NumArgs, Selector Sel, 5664 ObjCMethodDecl *Method, bool isClassMessage, 5665 bool isSuperMessage, 5666 SourceLocation lbrac, SourceLocation rbrac, 5667 QualType &ReturnType, ExprValueKind &VK); 5668 5669 /// \brief Determine the result of a message send expression based on 5670 /// the type of the receiver, the method expected to receive the message, 5671 /// and the form of the message send. 5672 QualType getMessageSendResultType(QualType ReceiverType, 5673 ObjCMethodDecl *Method, 5674 bool isClassMessage, bool isSuperMessage); 5675 5676 /// \brief If the given expression involves a message send to a method 5677 /// with a related result type, emit a note describing what happened. 5678 void EmitRelatedResultTypeNote(const Expr *E); 5679 5680 /// CheckBooleanCondition - Diagnose problems involving the use of 5681 /// the given expression as a boolean condition (e.g. in an if 5682 /// statement). Also performs the standard function and array 5683 /// decays, possibly changing the input variable. 5684 /// 5685 /// \param Loc - A location associated with the condition, e.g. the 5686 /// 'if' keyword. 5687 /// \return true iff there were any errors 5688 ExprResult CheckBooleanCondition(Expr *CondExpr, SourceLocation Loc); 5689 5690 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 5691 Expr *SubExpr); 5692 5693 /// DiagnoseAssignmentAsCondition - Given that an expression is 5694 /// being used as a boolean condition, warn if it's an assignment. 5695 void DiagnoseAssignmentAsCondition(Expr *E); 5696 5697 /// \brief Redundant parentheses over an equality comparison can indicate 5698 /// that the user intended an assignment used as condition. 5699 void DiagnoseEqualityWithExtraParens(ParenExpr *parenE); 5700 5701 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 5702 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 5703 5704 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 5705 /// the specified width and sign. If an overflow occurs, detect it and emit 5706 /// the specified diagnostic. 5707 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 5708 unsigned NewWidth, bool NewSign, 5709 SourceLocation Loc, unsigned DiagID); 5710 5711 /// Checks that the Objective-C declaration is declared in the global scope. 5712 /// Emits an error and marks the declaration as invalid if it's not declared 5713 /// in the global scope. 5714 bool CheckObjCDeclScope(Decl *D); 5715 5716 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 5717 /// and reports the appropriate diagnostics. Returns false on success. 5718 /// Can optionally return the value of the expression. 5719 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 5720 5721 /// VerifyBitField - verifies that a bit field expression is an ICE and has 5722 /// the correct width, and that the field type is valid. 5723 /// Returns false on success. 5724 /// Can optionally return whether the bit-field is of width 0 5725 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 5726 QualType FieldTy, const Expr *BitWidth, 5727 bool *ZeroWidth = 0); 5728 5729 /// \name Code completion 5730 //@{ 5731 /// \brief Describes the context in which code completion occurs. 5732 enum ParserCompletionContext { 5733 /// \brief Code completion occurs at top-level or namespace context. 5734 PCC_Namespace, 5735 /// \brief Code completion occurs within a class, struct, or union. 5736 PCC_Class, 5737 /// \brief Code completion occurs within an Objective-C interface, protocol, 5738 /// or category. 5739 PCC_ObjCInterface, 5740 /// \brief Code completion occurs within an Objective-C implementation or 5741 /// category implementation 5742 PCC_ObjCImplementation, 5743 /// \brief Code completion occurs within the list of instance variables 5744 /// in an Objective-C interface, protocol, category, or implementation. 5745 PCC_ObjCInstanceVariableList, 5746 /// \brief Code completion occurs following one or more template 5747 /// headers. 5748 PCC_Template, 5749 /// \brief Code completion occurs following one or more template 5750 /// headers within a class. 5751 PCC_MemberTemplate, 5752 /// \brief Code completion occurs within an expression. 5753 PCC_Expression, 5754 /// \brief Code completion occurs within a statement, which may 5755 /// also be an expression or a declaration. 5756 PCC_Statement, 5757 /// \brief Code completion occurs at the beginning of the 5758 /// initialization statement (or expression) in a for loop. 5759 PCC_ForInit, 5760 /// \brief Code completion occurs within the condition of an if, 5761 /// while, switch, or for statement. 5762 PCC_Condition, 5763 /// \brief Code completion occurs within the body of a function on a 5764 /// recovery path, where we do not have a specific handle on our position 5765 /// in the grammar. 5766 PCC_RecoveryInFunction, 5767 /// \brief Code completion occurs where only a type is permitted. 5768 PCC_Type, 5769 /// \brief Code completion occurs in a parenthesized expression, which 5770 /// might also be a type cast. 5771 PCC_ParenthesizedExpression, 5772 /// \brief Code completion occurs within a sequence of declaration 5773 /// specifiers within a function, method, or block. 5774 PCC_LocalDeclarationSpecifiers 5775 }; 5776 5777 void CodeCompleteOrdinaryName(Scope *S, 5778 ParserCompletionContext CompletionContext); 5779 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 5780 bool AllowNonIdentifiers, 5781 bool AllowNestedNameSpecifiers); 5782 5783 struct CodeCompleteExpressionData; 5784 void CodeCompleteExpression(Scope *S, 5785 const CodeCompleteExpressionData &Data); 5786 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 5787 SourceLocation OpLoc, 5788 bool IsArrow); 5789 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 5790 void CodeCompleteTag(Scope *S, unsigned TagSpec); 5791 void CodeCompleteTypeQualifiers(DeclSpec &DS); 5792 void CodeCompleteCase(Scope *S); 5793 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 5794 void CodeCompleteInitializer(Scope *S, Decl *D); 5795 void CodeCompleteReturn(Scope *S); 5796 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 5797 5798 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 5799 bool EnteringContext); 5800 void CodeCompleteUsing(Scope *S); 5801 void CodeCompleteUsingDirective(Scope *S); 5802 void CodeCompleteNamespaceDecl(Scope *S); 5803 void CodeCompleteNamespaceAliasDecl(Scope *S); 5804 void CodeCompleteOperatorName(Scope *S); 5805 void CodeCompleteConstructorInitializer(Decl *Constructor, 5806 CXXCtorInitializer** Initializers, 5807 unsigned NumInitializers); 5808 5809 void CodeCompleteObjCAtDirective(Scope *S, Decl *ObjCImpDecl, 5810 bool InInterface); 5811 void CodeCompleteObjCAtVisibility(Scope *S); 5812 void CodeCompleteObjCAtStatement(Scope *S); 5813 void CodeCompleteObjCAtExpression(Scope *S); 5814 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 5815 void CodeCompleteObjCPropertyGetter(Scope *S, Decl *ClassDecl); 5816 void CodeCompleteObjCPropertySetter(Scope *S, Decl *ClassDecl); 5817 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 5818 bool IsParameter); 5819 void CodeCompleteObjCMessageReceiver(Scope *S); 5820 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 5821 IdentifierInfo **SelIdents, 5822 unsigned NumSelIdents, 5823 bool AtArgumentExpression); 5824 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 5825 IdentifierInfo **SelIdents, 5826 unsigned NumSelIdents, 5827 bool AtArgumentExpression, 5828 bool IsSuper = false); 5829 void CodeCompleteObjCInstanceMessage(Scope *S, ExprTy *Receiver, 5830 IdentifierInfo **SelIdents, 5831 unsigned NumSelIdents, 5832 bool AtArgumentExpression, 5833 ObjCInterfaceDecl *Super = 0); 5834 void CodeCompleteObjCForCollection(Scope *S, 5835 DeclGroupPtrTy IterationVar); 5836 void CodeCompleteObjCSelector(Scope *S, 5837 IdentifierInfo **SelIdents, 5838 unsigned NumSelIdents); 5839 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 5840 unsigned NumProtocols); 5841 void CodeCompleteObjCProtocolDecl(Scope *S); 5842 void CodeCompleteObjCInterfaceDecl(Scope *S); 5843 void CodeCompleteObjCSuperclass(Scope *S, 5844 IdentifierInfo *ClassName, 5845 SourceLocation ClassNameLoc); 5846 void CodeCompleteObjCImplementationDecl(Scope *S); 5847 void CodeCompleteObjCInterfaceCategory(Scope *S, 5848 IdentifierInfo *ClassName, 5849 SourceLocation ClassNameLoc); 5850 void CodeCompleteObjCImplementationCategory(Scope *S, 5851 IdentifierInfo *ClassName, 5852 SourceLocation ClassNameLoc); 5853 void CodeCompleteObjCPropertyDefinition(Scope *S, Decl *ObjCImpDecl); 5854 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 5855 IdentifierInfo *PropertyName, 5856 Decl *ObjCImpDecl); 5857 void CodeCompleteObjCMethodDecl(Scope *S, 5858 bool IsInstanceMethod, 5859 ParsedType ReturnType, 5860 Decl *IDecl); 5861 void CodeCompleteObjCMethodDeclSelector(Scope *S, 5862 bool IsInstanceMethod, 5863 bool AtParameterName, 5864 ParsedType ReturnType, 5865 IdentifierInfo **SelIdents, 5866 unsigned NumSelIdents); 5867 void CodeCompletePreprocessorDirective(bool InConditional); 5868 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 5869 void CodeCompletePreprocessorMacroName(bool IsDefinition); 5870 void CodeCompletePreprocessorExpression(); 5871 void CodeCompletePreprocessorMacroArgument(Scope *S, 5872 IdentifierInfo *Macro, 5873 MacroInfo *MacroInfo, 5874 unsigned Argument); 5875 void CodeCompleteNaturalLanguage(); 5876 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 5877 SmallVectorImpl<CodeCompletionResult> &Results); 5878 //@} 5879 5880 //===--------------------------------------------------------------------===// 5881 // Extra semantic analysis beyond the C type system 5882 5883public: 5884 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 5885 unsigned ByteNo) const; 5886 5887private: 5888 void CheckArrayAccess(const Expr *E); 5889 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 5890 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 5891 5892 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 5893 bool CheckObjCString(Expr *Arg); 5894 5895 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5896 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5897 5898 bool SemaBuiltinVAStart(CallExpr *TheCall); 5899 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 5900 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 5901 5902public: 5903 // Used by C++ template instantiation. 5904 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 5905 5906private: 5907 bool SemaBuiltinPrefetch(CallExpr *TheCall); 5908 bool SemaBuiltinObjectSize(CallExpr *TheCall); 5909 bool SemaBuiltinLongjmp(CallExpr *TheCall); 5910 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 5911 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 5912 llvm::APSInt &Result); 5913 5914 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 5915 bool HasVAListArg, unsigned format_idx, 5916 unsigned firstDataArg, bool isPrintf); 5917 5918 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 5919 const CallExpr *TheCall, bool HasVAListArg, 5920 unsigned format_idx, unsigned firstDataArg, 5921 bool isPrintf); 5922 5923 void CheckNonNullArguments(const NonNullAttr *NonNull, 5924 const Expr * const *ExprArgs, 5925 SourceLocation CallSiteLoc); 5926 5927 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 5928 unsigned format_idx, unsigned firstDataArg, 5929 bool isPrintf); 5930 5931 /// \brief Enumeration used to describe which of the memory setting or copying 5932 /// functions is being checked by \c CheckMemsetcpymoveArguments(). 5933 enum CheckedMemoryFunction { 5934 CMF_Memset, 5935 CMF_Memcpy, 5936 CMF_Memmove 5937 }; 5938 5939 void CheckMemsetcpymoveArguments(const CallExpr *Call, 5940 CheckedMemoryFunction CMF, 5941 IdentifierInfo *FnName); 5942 5943 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 5944 SourceLocation ReturnLoc); 5945 void CheckFloatComparison(SourceLocation loc, Expr* lex, Expr* rex); 5946 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 5947 5948 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 5949 Expr *Init); 5950 5951 /// \brief The parser's current scope. 5952 /// 5953 /// The parser maintains this state here. 5954 Scope *CurScope; 5955 5956protected: 5957 friend class Parser; 5958 friend class InitializationSequence; 5959 friend class ASTReader; 5960 friend class ASTWriter; 5961 5962public: 5963 /// \brief Retrieve the parser's current scope. 5964 /// 5965 /// This routine must only be used when it is certain that semantic analysis 5966 /// and the parser are in precisely the same context, which is not the case 5967 /// when, e.g., we are performing any kind of template instantiation. 5968 /// Therefore, the only safe places to use this scope are in the parser 5969 /// itself and in routines directly invoked from the parser and *never* from 5970 /// template substitution or instantiation. 5971 Scope *getCurScope() const { return CurScope; } 5972}; 5973 5974/// \brief RAII object that enters a new expression evaluation context. 5975class EnterExpressionEvaluationContext { 5976 Sema &Actions; 5977 5978public: 5979 EnterExpressionEvaluationContext(Sema &Actions, 5980 Sema::ExpressionEvaluationContext NewContext) 5981 : Actions(Actions) { 5982 Actions.PushExpressionEvaluationContext(NewContext); 5983 } 5984 5985 ~EnterExpressionEvaluationContext() { 5986 Actions.PopExpressionEvaluationContext(); 5987 } 5988}; 5989 5990} // end namespace clang 5991 5992#endif 5993