1 //===-- DeclCXX.h - Classes for representing C++ declarations -*- 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 /// \file 11 /// \brief Defines the C++ Decl subclasses, other than those for templates 12 /// (found in DeclTemplate.h) and friends (in DeclFriend.h). 13 /// 14 //===----------------------------------------------------------------------===// 15 16 #ifndef LLVM_CLANG_AST_DECLCXX_H 17 #define LLVM_CLANG_AST_DECLCXX_H 18 19 #include "clang/AST/ASTContext.h" 20 #include "clang/AST/ASTUnresolvedSet.h" 21 #include "clang/AST/Attr.h" 22 #include "clang/AST/Decl.h" 23 #include "clang/AST/Expr.h" 24 #include "clang/AST/LambdaCapture.h" 25 #include "llvm/ADT/DenseMap.h" 26 #include "llvm/ADT/PointerIntPair.h" 27 #include "llvm/Support/Compiler.h" 28 29 namespace clang { 30 31 class ClassTemplateDecl; 32 class ClassTemplateSpecializationDecl; 33 class ConstructorUsingShadowDecl; 34 class CXXBasePath; 35 class CXXBasePaths; 36 class CXXConstructorDecl; 37 class CXXConversionDecl; 38 class CXXDestructorDecl; 39 class CXXMethodDecl; 40 class CXXRecordDecl; 41 class CXXMemberLookupCriteria; 42 class CXXFinalOverriderMap; 43 class CXXIndirectPrimaryBaseSet; 44 class FriendDecl; 45 class LambdaExpr; 46 class UsingDecl; 47 48 /// \brief Represents any kind of function declaration, whether it is a 49 /// concrete function or a function template. 50 class AnyFunctionDecl { 51 NamedDecl *Function; 52 53 AnyFunctionDecl(NamedDecl *ND) : Function(ND) { } 54 55 public: 56 AnyFunctionDecl(FunctionDecl *FD) : Function(FD) { } 57 AnyFunctionDecl(FunctionTemplateDecl *FTD); 58 59 /// \brief Implicily converts any function or function template into a 60 /// named declaration. 61 operator NamedDecl *() const { return Function; } 62 63 /// \brief Retrieve the underlying function or function template. 64 NamedDecl *get() const { return Function; } 65 66 static AnyFunctionDecl getFromNamedDecl(NamedDecl *ND) { 67 return AnyFunctionDecl(ND); 68 } 69 }; 70 71 } // end namespace clang 72 73 namespace llvm { 74 // Provide PointerLikeTypeTraits for non-cvr pointers. 75 template<> 76 class PointerLikeTypeTraits< ::clang::AnyFunctionDecl> { 77 public: 78 static inline void *getAsVoidPointer(::clang::AnyFunctionDecl F) { 79 return F.get(); 80 } 81 static inline ::clang::AnyFunctionDecl getFromVoidPointer(void *P) { 82 return ::clang::AnyFunctionDecl::getFromNamedDecl( 83 static_cast< ::clang::NamedDecl*>(P)); 84 } 85 86 enum { NumLowBitsAvailable = 2 }; 87 }; 88 89 } // end namespace llvm 90 91 namespace clang { 92 93 /// \brief Represents an access specifier followed by colon ':'. 94 /// 95 /// An objects of this class represents sugar for the syntactic occurrence 96 /// of an access specifier followed by a colon in the list of member 97 /// specifiers of a C++ class definition. 98 /// 99 /// Note that they do not represent other uses of access specifiers, 100 /// such as those occurring in a list of base specifiers. 101 /// Also note that this class has nothing to do with so-called 102 /// "access declarations" (C++98 11.3 [class.access.dcl]). 103 class AccessSpecDecl : public Decl { 104 virtual void anchor(); 105 /// \brief The location of the ':'. 106 SourceLocation ColonLoc; 107 108 AccessSpecDecl(AccessSpecifier AS, DeclContext *DC, 109 SourceLocation ASLoc, SourceLocation ColonLoc) 110 : Decl(AccessSpec, DC, ASLoc), ColonLoc(ColonLoc) { 111 setAccess(AS); 112 } 113 AccessSpecDecl(EmptyShell Empty) 114 : Decl(AccessSpec, Empty) { } 115 public: 116 /// \brief The location of the access specifier. 117 SourceLocation getAccessSpecifierLoc() const { return getLocation(); } 118 /// \brief Sets the location of the access specifier. 119 void setAccessSpecifierLoc(SourceLocation ASLoc) { setLocation(ASLoc); } 120 121 /// \brief The location of the colon following the access specifier. 122 SourceLocation getColonLoc() const { return ColonLoc; } 123 /// \brief Sets the location of the colon. 124 void setColonLoc(SourceLocation CLoc) { ColonLoc = CLoc; } 125 126 SourceRange getSourceRange() const override LLVM_READONLY { 127 return SourceRange(getAccessSpecifierLoc(), getColonLoc()); 128 } 129 130 static AccessSpecDecl *Create(ASTContext &C, AccessSpecifier AS, 131 DeclContext *DC, SourceLocation ASLoc, 132 SourceLocation ColonLoc) { 133 return new (C, DC) AccessSpecDecl(AS, DC, ASLoc, ColonLoc); 134 } 135 static AccessSpecDecl *CreateDeserialized(ASTContext &C, unsigned ID); 136 137 // Implement isa/cast/dyncast/etc. 138 static bool classof(const Decl *D) { return classofKind(D->getKind()); } 139 static bool classofKind(Kind K) { return K == AccessSpec; } 140 }; 141 142 /// \brief Represents a base class of a C++ class. 143 /// 144 /// Each CXXBaseSpecifier represents a single, direct base class (or 145 /// struct) of a C++ class (or struct). It specifies the type of that 146 /// base class, whether it is a virtual or non-virtual base, and what 147 /// level of access (public, protected, private) is used for the 148 /// derivation. For example: 149 /// 150 /// \code 151 /// class A { }; 152 /// class B { }; 153 /// class C : public virtual A, protected B { }; 154 /// \endcode 155 /// 156 /// In this code, C will have two CXXBaseSpecifiers, one for "public 157 /// virtual A" and the other for "protected B". 158 class CXXBaseSpecifier { 159 /// \brief The source code range that covers the full base 160 /// specifier, including the "virtual" (if present) and access 161 /// specifier (if present). 162 SourceRange Range; 163 164 /// \brief The source location of the ellipsis, if this is a pack 165 /// expansion. 166 SourceLocation EllipsisLoc; 167 168 /// \brief Whether this is a virtual base class or not. 169 unsigned Virtual : 1; 170 171 /// \brief Whether this is the base of a class (true) or of a struct (false). 172 /// 173 /// This determines the mapping from the access specifier as written in the 174 /// source code to the access specifier used for semantic analysis. 175 unsigned BaseOfClass : 1; 176 177 /// \brief Access specifier as written in the source code (may be AS_none). 178 /// 179 /// The actual type of data stored here is an AccessSpecifier, but we use 180 /// "unsigned" here to work around a VC++ bug. 181 unsigned Access : 2; 182 183 /// \brief Whether the class contains a using declaration 184 /// to inherit the named class's constructors. 185 unsigned InheritConstructors : 1; 186 187 /// \brief The type of the base class. 188 /// 189 /// This will be a class or struct (or a typedef of such). The source code 190 /// range does not include the \c virtual or the access specifier. 191 TypeSourceInfo *BaseTypeInfo; 192 193 public: 194 CXXBaseSpecifier() { } 195 196 CXXBaseSpecifier(SourceRange R, bool V, bool BC, AccessSpecifier A, 197 TypeSourceInfo *TInfo, SourceLocation EllipsisLoc) 198 : Range(R), EllipsisLoc(EllipsisLoc), Virtual(V), BaseOfClass(BC), 199 Access(A), InheritConstructors(false), BaseTypeInfo(TInfo) { } 200 201 /// \brief Retrieves the source range that contains the entire base specifier. 202 SourceRange getSourceRange() const LLVM_READONLY { return Range; } 203 SourceLocation getLocStart() const LLVM_READONLY { return Range.getBegin(); } 204 SourceLocation getLocEnd() const LLVM_READONLY { return Range.getEnd(); } 205 206 /// \brief Get the location at which the base class type was written. 207 SourceLocation getBaseTypeLoc() const LLVM_READONLY { 208 return BaseTypeInfo->getTypeLoc().getLocStart(); 209 } 210 211 /// \brief Determines whether the base class is a virtual base class (or not). 212 bool isVirtual() const { return Virtual; } 213 214 /// \brief Determine whether this base class is a base of a class declared 215 /// with the 'class' keyword (vs. one declared with the 'struct' keyword). 216 bool isBaseOfClass() const { return BaseOfClass; } 217 218 /// \brief Determine whether this base specifier is a pack expansion. 219 bool isPackExpansion() const { return EllipsisLoc.isValid(); } 220 221 /// \brief Determine whether this base class's constructors get inherited. 222 bool getInheritConstructors() const { return InheritConstructors; } 223 224 /// \brief Set that this base class's constructors should be inherited. 225 void setInheritConstructors(bool Inherit = true) { 226 InheritConstructors = Inherit; 227 } 228 229 /// \brief For a pack expansion, determine the location of the ellipsis. 230 SourceLocation getEllipsisLoc() const { 231 return EllipsisLoc; 232 } 233 234 /// \brief Returns the access specifier for this base specifier. 235 /// 236 /// This is the actual base specifier as used for semantic analysis, so 237 /// the result can never be AS_none. To retrieve the access specifier as 238 /// written in the source code, use getAccessSpecifierAsWritten(). 239 AccessSpecifier getAccessSpecifier() const { 240 if ((AccessSpecifier)Access == AS_none) 241 return BaseOfClass? AS_private : AS_public; 242 else 243 return (AccessSpecifier)Access; 244 } 245 246 /// \brief Retrieves the access specifier as written in the source code 247 /// (which may mean that no access specifier was explicitly written). 248 /// 249 /// Use getAccessSpecifier() to retrieve the access specifier for use in 250 /// semantic analysis. 251 AccessSpecifier getAccessSpecifierAsWritten() const { 252 return (AccessSpecifier)Access; 253 } 254 255 /// \brief Retrieves the type of the base class. 256 /// 257 /// This type will always be an unqualified class type. 258 QualType getType() const { 259 return BaseTypeInfo->getType().getUnqualifiedType(); 260 } 261 262 /// \brief Retrieves the type and source location of the base class. 263 TypeSourceInfo *getTypeSourceInfo() const { return BaseTypeInfo; } 264 }; 265 266 /// \brief Represents a C++ struct/union/class. 267 class CXXRecordDecl : public RecordDecl { 268 269 friend void TagDecl::startDefinition(); 270 271 /// Values used in DefinitionData fields to represent special members. 272 enum SpecialMemberFlags { 273 SMF_DefaultConstructor = 0x1, 274 SMF_CopyConstructor = 0x2, 275 SMF_MoveConstructor = 0x4, 276 SMF_CopyAssignment = 0x8, 277 SMF_MoveAssignment = 0x10, 278 SMF_Destructor = 0x20, 279 SMF_All = 0x3f 280 }; 281 282 struct DefinitionData { 283 DefinitionData(CXXRecordDecl *D); 284 285 /// \brief True if this class has any user-declared constructors. 286 unsigned UserDeclaredConstructor : 1; 287 288 /// \brief The user-declared special members which this class has. 289 unsigned UserDeclaredSpecialMembers : 6; 290 291 /// \brief True when this class is an aggregate. 292 unsigned Aggregate : 1; 293 294 /// \brief True when this class is a POD-type. 295 unsigned PlainOldData : 1; 296 297 /// true when this class is empty for traits purposes, 298 /// i.e. has no data members other than 0-width bit-fields, has no 299 /// virtual function/base, and doesn't inherit from a non-empty 300 /// class. Doesn't take union-ness into account. 301 unsigned Empty : 1; 302 303 /// \brief True when this class is polymorphic, i.e., has at 304 /// least one virtual member or derives from a polymorphic class. 305 unsigned Polymorphic : 1; 306 307 /// \brief True when this class is abstract, i.e., has at least 308 /// one pure virtual function, (that can come from a base class). 309 unsigned Abstract : 1; 310 311 /// \brief True when this class has standard layout. 312 /// 313 /// C++11 [class]p7. A standard-layout class is a class that: 314 /// * has no non-static data members of type non-standard-layout class (or 315 /// array of such types) or reference, 316 /// * has no virtual functions (10.3) and no virtual base classes (10.1), 317 /// * has the same access control (Clause 11) for all non-static data 318 /// members 319 /// * has no non-standard-layout base classes, 320 /// * either has no non-static data members in the most derived class and at 321 /// most one base class with non-static data members, or has no base 322 /// classes with non-static data members, and 323 /// * has no base classes of the same type as the first non-static data 324 /// member. 325 unsigned IsStandardLayout : 1; 326 327 /// \brief True when there are no non-empty base classes. 328 /// 329 /// This is a helper bit of state used to implement IsStandardLayout more 330 /// efficiently. 331 unsigned HasNoNonEmptyBases : 1; 332 333 /// \brief True when there are private non-static data members. 334 unsigned HasPrivateFields : 1; 335 336 /// \brief True when there are protected non-static data members. 337 unsigned HasProtectedFields : 1; 338 339 /// \brief True when there are private non-static data members. 340 unsigned HasPublicFields : 1; 341 342 /// \brief True if this class (or any subobject) has mutable fields. 343 unsigned HasMutableFields : 1; 344 345 /// \brief True if this class (or any nested anonymous struct or union) 346 /// has variant members. 347 unsigned HasVariantMembers : 1; 348 349 /// \brief True if there no non-field members declared by the user. 350 unsigned HasOnlyCMembers : 1; 351 352 /// \brief True if any field has an in-class initializer, including those 353 /// within anonymous unions or structs. 354 unsigned HasInClassInitializer : 1; 355 356 /// \brief True if any field is of reference type, and does not have an 357 /// in-class initializer. 358 /// 359 /// In this case, value-initialization of this class is illegal in C++98 360 /// even if the class has a trivial default constructor. 361 unsigned HasUninitializedReferenceMember : 1; 362 363 /// \brief True if any non-mutable field whose type doesn't have a user- 364 /// provided default ctor also doesn't have an in-class initializer. 365 unsigned HasUninitializedFields : 1; 366 367 /// \brief True if there are any member using-declarations that inherit 368 /// constructors from a base class. 369 unsigned HasInheritedConstructor : 1; 370 371 /// \brief True if there are any member using-declarations named 372 /// 'operator='. 373 unsigned HasInheritedAssignment : 1; 374 375 /// \brief These flags are \c true if a defaulted corresponding special 376 /// member can't be fully analyzed without performing overload resolution. 377 /// @{ 378 unsigned NeedOverloadResolutionForMoveConstructor : 1; 379 unsigned NeedOverloadResolutionForMoveAssignment : 1; 380 unsigned NeedOverloadResolutionForDestructor : 1; 381 /// @} 382 383 /// \brief These flags are \c true if an implicit defaulted corresponding 384 /// special member would be defined as deleted. 385 /// @{ 386 unsigned DefaultedMoveConstructorIsDeleted : 1; 387 unsigned DefaultedMoveAssignmentIsDeleted : 1; 388 unsigned DefaultedDestructorIsDeleted : 1; 389 /// @} 390 391 /// \brief The trivial special members which this class has, per 392 /// C++11 [class.ctor]p5, C++11 [class.copy]p12, C++11 [class.copy]p25, 393 /// C++11 [class.dtor]p5, or would have if the member were not suppressed. 394 /// 395 /// This excludes any user-declared but not user-provided special members 396 /// which have been declared but not yet defined. 397 unsigned HasTrivialSpecialMembers : 6; 398 399 /// \brief The declared special members of this class which are known to be 400 /// non-trivial. 401 /// 402 /// This excludes any user-declared but not user-provided special members 403 /// which have been declared but not yet defined, and any implicit special 404 /// members which have not yet been declared. 405 unsigned DeclaredNonTrivialSpecialMembers : 6; 406 407 /// \brief True when this class has a destructor with no semantic effect. 408 unsigned HasIrrelevantDestructor : 1; 409 410 /// \brief True when this class has at least one user-declared constexpr 411 /// constructor which is neither the copy nor move constructor. 412 unsigned HasConstexprNonCopyMoveConstructor : 1; 413 414 /// \brief True if this class has a (possibly implicit) defaulted default 415 /// constructor. 416 unsigned HasDefaultedDefaultConstructor : 1; 417 418 /// \brief True if a defaulted default constructor for this class would 419 /// be constexpr. 420 unsigned DefaultedDefaultConstructorIsConstexpr : 1; 421 422 /// \brief True if this class has a constexpr default constructor. 423 /// 424 /// This is true for either a user-declared constexpr default constructor 425 /// or an implicitly declared constexpr default constructor. 426 unsigned HasConstexprDefaultConstructor : 1; 427 428 /// \brief True when this class contains at least one non-static data 429 /// member or base class of non-literal or volatile type. 430 unsigned HasNonLiteralTypeFieldsOrBases : 1; 431 432 /// \brief True when visible conversion functions are already computed 433 /// and are available. 434 unsigned ComputedVisibleConversions : 1; 435 436 /// \brief Whether we have a C++11 user-provided default constructor (not 437 /// explicitly deleted or defaulted). 438 unsigned UserProvidedDefaultConstructor : 1; 439 440 /// \brief The special members which have been declared for this class, 441 /// either by the user or implicitly. 442 unsigned DeclaredSpecialMembers : 6; 443 444 /// \brief Whether an implicit copy constructor could have a const-qualified 445 /// parameter, for initializing virtual bases and for other subobjects. 446 unsigned ImplicitCopyConstructorCanHaveConstParamForVBase : 1; 447 unsigned ImplicitCopyConstructorCanHaveConstParamForNonVBase : 1; 448 449 /// \brief Whether an implicit copy assignment operator would have a 450 /// const-qualified parameter. 451 unsigned ImplicitCopyAssignmentHasConstParam : 1; 452 453 /// \brief Whether any declared copy constructor has a const-qualified 454 /// parameter. 455 unsigned HasDeclaredCopyConstructorWithConstParam : 1; 456 457 /// \brief Whether any declared copy assignment operator has either a 458 /// const-qualified reference parameter or a non-reference parameter. 459 unsigned HasDeclaredCopyAssignmentWithConstParam : 1; 460 461 /// \brief Whether this class describes a C++ lambda. 462 unsigned IsLambda : 1; 463 464 /// \brief Whether we are currently parsing base specifiers. 465 unsigned IsParsingBaseSpecifiers : 1; 466 467 unsigned HasODRHash : 1; 468 469 /// \brief A hash of parts of the class to help in ODR checking. 470 unsigned ODRHash; 471 472 /// \brief The number of base class specifiers in Bases. 473 unsigned NumBases; 474 475 /// \brief The number of virtual base class specifiers in VBases. 476 unsigned NumVBases; 477 478 /// \brief Base classes of this class. 479 /// 480 /// FIXME: This is wasted space for a union. 481 LazyCXXBaseSpecifiersPtr Bases; 482 483 /// \brief direct and indirect virtual base classes of this class. 484 LazyCXXBaseSpecifiersPtr VBases; 485 486 /// \brief The conversion functions of this C++ class (but not its 487 /// inherited conversion functions). 488 /// 489 /// Each of the entries in this overload set is a CXXConversionDecl. 490 LazyASTUnresolvedSet Conversions; 491 492 /// \brief The conversion functions of this C++ class and all those 493 /// inherited conversion functions that are visible in this class. 494 /// 495 /// Each of the entries in this overload set is a CXXConversionDecl or a 496 /// FunctionTemplateDecl. 497 LazyASTUnresolvedSet VisibleConversions; 498 499 /// \brief The declaration which defines this record. 500 CXXRecordDecl *Definition; 501 502 /// \brief The first friend declaration in this class, or null if there 503 /// aren't any. 504 /// 505 /// This is actually currently stored in reverse order. 506 LazyDeclPtr FirstFriend; 507 508 /// \brief Retrieve the set of direct base classes. 509 CXXBaseSpecifier *getBases() const { 510 if (!Bases.isOffset()) 511 return Bases.get(nullptr); 512 return getBasesSlowCase(); 513 } 514 515 /// \brief Retrieve the set of virtual base classes. 516 CXXBaseSpecifier *getVBases() const { 517 if (!VBases.isOffset()) 518 return VBases.get(nullptr); 519 return getVBasesSlowCase(); 520 } 521 522 ArrayRef<CXXBaseSpecifier> bases() const { 523 return llvm::makeArrayRef(getBases(), NumBases); 524 } 525 ArrayRef<CXXBaseSpecifier> vbases() const { 526 return llvm::makeArrayRef(getVBases(), NumVBases); 527 } 528 529 private: 530 CXXBaseSpecifier *getBasesSlowCase() const; 531 CXXBaseSpecifier *getVBasesSlowCase() const; 532 }; 533 534 struct DefinitionData *DefinitionData; 535 536 /// \brief Describes a C++ closure type (generated by a lambda expression). 537 struct LambdaDefinitionData : public DefinitionData { 538 typedef LambdaCapture Capture; 539 540 LambdaDefinitionData(CXXRecordDecl *D, TypeSourceInfo *Info, 541 bool Dependent, bool IsGeneric, 542 LambdaCaptureDefault CaptureDefault) 543 : DefinitionData(D), Dependent(Dependent), IsGenericLambda(IsGeneric), 544 CaptureDefault(CaptureDefault), NumCaptures(0), NumExplicitCaptures(0), 545 ManglingNumber(0), ContextDecl(nullptr), Captures(nullptr), 546 MethodTyInfo(Info) { 547 IsLambda = true; 548 549 // C++1z [expr.prim.lambda]p4: 550 // This class type is not an aggregate type. 551 Aggregate = false; 552 PlainOldData = false; 553 } 554 555 /// \brief Whether this lambda is known to be dependent, even if its 556 /// context isn't dependent. 557 /// 558 /// A lambda with a non-dependent context can be dependent if it occurs 559 /// within the default argument of a function template, because the 560 /// lambda will have been created with the enclosing context as its 561 /// declaration context, rather than function. This is an unfortunate 562 /// artifact of having to parse the default arguments before. 563 unsigned Dependent : 1; 564 565 /// \brief Whether this lambda is a generic lambda. 566 unsigned IsGenericLambda : 1; 567 568 /// \brief The Default Capture. 569 unsigned CaptureDefault : 2; 570 571 /// \brief The number of captures in this lambda is limited 2^NumCaptures. 572 unsigned NumCaptures : 15; 573 574 /// \brief The number of explicit captures in this lambda. 575 unsigned NumExplicitCaptures : 13; 576 577 /// \brief The number used to indicate this lambda expression for name 578 /// mangling in the Itanium C++ ABI. 579 unsigned ManglingNumber; 580 581 /// \brief The declaration that provides context for this lambda, if the 582 /// actual DeclContext does not suffice. This is used for lambdas that 583 /// occur within default arguments of function parameters within the class 584 /// or within a data member initializer. 585 LazyDeclPtr ContextDecl; 586 587 /// \brief The list of captures, both explicit and implicit, for this 588 /// lambda. 589 Capture *Captures; 590 591 /// \brief The type of the call method. 592 TypeSourceInfo *MethodTyInfo; 593 594 }; 595 596 struct DefinitionData *dataPtr() const { 597 // Complete the redecl chain (if necessary). 598 getMostRecentDecl(); 599 return DefinitionData; 600 } 601 602 struct DefinitionData &data() const { 603 auto *DD = dataPtr(); 604 assert(DD && "queried property of class with no definition"); 605 return *DD; 606 } 607 608 struct LambdaDefinitionData &getLambdaData() const { 609 // No update required: a merged definition cannot change any lambda 610 // properties. 611 auto *DD = DefinitionData; 612 assert(DD && DD->IsLambda && "queried lambda property of non-lambda class"); 613 return static_cast<LambdaDefinitionData&>(*DD); 614 } 615 616 /// \brief The template or declaration that this declaration 617 /// describes or was instantiated from, respectively. 618 /// 619 /// For non-templates, this value will be null. For record 620 /// declarations that describe a class template, this will be a 621 /// pointer to a ClassTemplateDecl. For member 622 /// classes of class template specializations, this will be the 623 /// MemberSpecializationInfo referring to the member class that was 624 /// instantiated or specialized. 625 llvm::PointerUnion<ClassTemplateDecl*, MemberSpecializationInfo*> 626 TemplateOrInstantiation; 627 628 friend class DeclContext; 629 friend class LambdaExpr; 630 631 /// \brief Called from setBases and addedMember to notify the class that a 632 /// direct or virtual base class or a member of class type has been added. 633 void addedClassSubobject(CXXRecordDecl *Base); 634 635 /// \brief Notify the class that member has been added. 636 /// 637 /// This routine helps maintain information about the class based on which 638 /// members have been added. It will be invoked by DeclContext::addDecl() 639 /// whenever a member is added to this record. 640 void addedMember(Decl *D); 641 642 void markedVirtualFunctionPure(); 643 friend void FunctionDecl::setPure(bool); 644 645 friend class ASTNodeImporter; 646 647 /// \brief Get the head of our list of friend declarations, possibly 648 /// deserializing the friends from an external AST source. 649 FriendDecl *getFirstFriend() const; 650 651 protected: 652 CXXRecordDecl(Kind K, TagKind TK, const ASTContext &C, DeclContext *DC, 653 SourceLocation StartLoc, SourceLocation IdLoc, 654 IdentifierInfo *Id, CXXRecordDecl *PrevDecl); 655 656 public: 657 /// \brief Iterator that traverses the base classes of a class. 658 typedef CXXBaseSpecifier* base_class_iterator; 659 660 /// \brief Iterator that traverses the base classes of a class. 661 typedef const CXXBaseSpecifier* base_class_const_iterator; 662 663 CXXRecordDecl *getCanonicalDecl() override { 664 return cast<CXXRecordDecl>(RecordDecl::getCanonicalDecl()); 665 } 666 const CXXRecordDecl *getCanonicalDecl() const { 667 return const_cast<CXXRecordDecl*>(this)->getCanonicalDecl(); 668 } 669 670 CXXRecordDecl *getPreviousDecl() { 671 return cast_or_null<CXXRecordDecl>( 672 static_cast<RecordDecl *>(this)->getPreviousDecl()); 673 } 674 const CXXRecordDecl *getPreviousDecl() const { 675 return const_cast<CXXRecordDecl*>(this)->getPreviousDecl(); 676 } 677 678 CXXRecordDecl *getMostRecentDecl() { 679 return cast<CXXRecordDecl>( 680 static_cast<RecordDecl *>(this)->getMostRecentDecl()); 681 } 682 683 const CXXRecordDecl *getMostRecentDecl() const { 684 return const_cast<CXXRecordDecl*>(this)->getMostRecentDecl(); 685 } 686 687 CXXRecordDecl *getDefinition() const { 688 // We only need an update if we don't already know which 689 // declaration is the definition. 690 auto *DD = DefinitionData ? DefinitionData : dataPtr(); 691 return DD ? DD->Definition : nullptr; 692 } 693 694 bool hasDefinition() const { return DefinitionData || dataPtr(); } 695 696 static CXXRecordDecl *Create(const ASTContext &C, TagKind TK, DeclContext *DC, 697 SourceLocation StartLoc, SourceLocation IdLoc, 698 IdentifierInfo *Id, 699 CXXRecordDecl *PrevDecl = nullptr, 700 bool DelayTypeCreation = false); 701 static CXXRecordDecl *CreateLambda(const ASTContext &C, DeclContext *DC, 702 TypeSourceInfo *Info, SourceLocation Loc, 703 bool DependentLambda, bool IsGeneric, 704 LambdaCaptureDefault CaptureDefault); 705 static CXXRecordDecl *CreateDeserialized(const ASTContext &C, unsigned ID); 706 707 bool isDynamicClass() const { 708 return data().Polymorphic || data().NumVBases != 0; 709 } 710 711 void setIsParsingBaseSpecifiers() { data().IsParsingBaseSpecifiers = true; } 712 713 bool isParsingBaseSpecifiers() const { 714 return data().IsParsingBaseSpecifiers; 715 } 716 717 unsigned getODRHash() const; 718 719 /// \brief Sets the base classes of this struct or class. 720 void setBases(CXXBaseSpecifier const * const *Bases, unsigned NumBases); 721 722 /// \brief Retrieves the number of base classes of this class. 723 unsigned getNumBases() const { return data().NumBases; } 724 725 typedef llvm::iterator_range<base_class_iterator> base_class_range; 726 typedef llvm::iterator_range<base_class_const_iterator> 727 base_class_const_range; 728 729 base_class_range bases() { 730 return base_class_range(bases_begin(), bases_end()); 731 } 732 base_class_const_range bases() const { 733 return base_class_const_range(bases_begin(), bases_end()); 734 } 735 736 base_class_iterator bases_begin() { return data().getBases(); } 737 base_class_const_iterator bases_begin() const { return data().getBases(); } 738 base_class_iterator bases_end() { return bases_begin() + data().NumBases; } 739 base_class_const_iterator bases_end() const { 740 return bases_begin() + data().NumBases; 741 } 742 743 /// \brief Retrieves the number of virtual base classes of this class. 744 unsigned getNumVBases() const { return data().NumVBases; } 745 746 base_class_range vbases() { 747 return base_class_range(vbases_begin(), vbases_end()); 748 } 749 base_class_const_range vbases() const { 750 return base_class_const_range(vbases_begin(), vbases_end()); 751 } 752 753 base_class_iterator vbases_begin() { return data().getVBases(); } 754 base_class_const_iterator vbases_begin() const { return data().getVBases(); } 755 base_class_iterator vbases_end() { return vbases_begin() + data().NumVBases; } 756 base_class_const_iterator vbases_end() const { 757 return vbases_begin() + data().NumVBases; 758 } 759 760 /// \brief Determine whether this class has any dependent base classes which 761 /// are not the current instantiation. 762 bool hasAnyDependentBases() const; 763 764 /// Iterator access to method members. The method iterator visits 765 /// all method members of the class, including non-instance methods, 766 /// special methods, etc. 767 typedef specific_decl_iterator<CXXMethodDecl> method_iterator; 768 typedef llvm::iterator_range<specific_decl_iterator<CXXMethodDecl>> 769 method_range; 770 771 method_range methods() const { 772 return method_range(method_begin(), method_end()); 773 } 774 775 /// \brief Method begin iterator. Iterates in the order the methods 776 /// were declared. 777 method_iterator method_begin() const { 778 return method_iterator(decls_begin()); 779 } 780 /// \brief Method past-the-end iterator. 781 method_iterator method_end() const { 782 return method_iterator(decls_end()); 783 } 784 785 /// Iterator access to constructor members. 786 typedef specific_decl_iterator<CXXConstructorDecl> ctor_iterator; 787 typedef llvm::iterator_range<specific_decl_iterator<CXXConstructorDecl>> 788 ctor_range; 789 790 ctor_range ctors() const { return ctor_range(ctor_begin(), ctor_end()); } 791 792 ctor_iterator ctor_begin() const { 793 return ctor_iterator(decls_begin()); 794 } 795 ctor_iterator ctor_end() const { 796 return ctor_iterator(decls_end()); 797 } 798 799 /// An iterator over friend declarations. All of these are defined 800 /// in DeclFriend.h. 801 class friend_iterator; 802 typedef llvm::iterator_range<friend_iterator> friend_range; 803 804 friend_range friends() const; 805 friend_iterator friend_begin() const; 806 friend_iterator friend_end() const; 807 void pushFriendDecl(FriendDecl *FD); 808 809 /// Determines whether this record has any friends. 810 bool hasFriends() const { 811 return data().FirstFriend.isValid(); 812 } 813 814 /// \brief \c true if we know for sure that this class has a single, 815 /// accessible, unambiguous move constructor that is not deleted. 816 bool hasSimpleMoveConstructor() const { 817 return !hasUserDeclaredMoveConstructor() && hasMoveConstructor() && 818 !data().DefaultedMoveConstructorIsDeleted; 819 } 820 /// \brief \c true if we know for sure that this class has a single, 821 /// accessible, unambiguous move assignment operator that is not deleted. 822 bool hasSimpleMoveAssignment() const { 823 return !hasUserDeclaredMoveAssignment() && hasMoveAssignment() && 824 !data().DefaultedMoveAssignmentIsDeleted; 825 } 826 /// \brief \c true if we know for sure that this class has an accessible 827 /// destructor that is not deleted. 828 bool hasSimpleDestructor() const { 829 return !hasUserDeclaredDestructor() && 830 !data().DefaultedDestructorIsDeleted; 831 } 832 833 /// \brief Determine whether this class has any default constructors. 834 bool hasDefaultConstructor() const { 835 return (data().DeclaredSpecialMembers & SMF_DefaultConstructor) || 836 needsImplicitDefaultConstructor(); 837 } 838 839 /// \brief Determine if we need to declare a default constructor for 840 /// this class. 841 /// 842 /// This value is used for lazy creation of default constructors. 843 bool needsImplicitDefaultConstructor() const { 844 return !data().UserDeclaredConstructor && 845 !(data().DeclaredSpecialMembers & SMF_DefaultConstructor) && 846 // C++14 [expr.prim.lambda]p20: 847 // The closure type associated with a lambda-expression has no 848 // default constructor. 849 !isLambda(); 850 } 851 852 /// \brief Determine whether this class has any user-declared constructors. 853 /// 854 /// When true, a default constructor will not be implicitly declared. 855 bool hasUserDeclaredConstructor() const { 856 return data().UserDeclaredConstructor; 857 } 858 859 /// \brief Whether this class has a user-provided default constructor 860 /// per C++11. 861 bool hasUserProvidedDefaultConstructor() const { 862 return data().UserProvidedDefaultConstructor; 863 } 864 865 /// \brief Determine whether this class has a user-declared copy constructor. 866 /// 867 /// When false, a copy constructor will be implicitly declared. 868 bool hasUserDeclaredCopyConstructor() const { 869 return data().UserDeclaredSpecialMembers & SMF_CopyConstructor; 870 } 871 872 /// \brief Determine whether this class needs an implicit copy 873 /// constructor to be lazily declared. 874 bool needsImplicitCopyConstructor() const { 875 return !(data().DeclaredSpecialMembers & SMF_CopyConstructor); 876 } 877 878 /// \brief Determine whether we need to eagerly declare a defaulted copy 879 /// constructor for this class. 880 bool needsOverloadResolutionForCopyConstructor() const { 881 return data().HasMutableFields; 882 } 883 884 /// \brief Determine whether an implicit copy constructor for this type 885 /// would have a parameter with a const-qualified reference type. 886 bool implicitCopyConstructorHasConstParam() const { 887 return data().ImplicitCopyConstructorCanHaveConstParamForNonVBase && 888 (isAbstract() || 889 data().ImplicitCopyConstructorCanHaveConstParamForVBase); 890 } 891 892 /// \brief Determine whether this class has a copy constructor with 893 /// a parameter type which is a reference to a const-qualified type. 894 bool hasCopyConstructorWithConstParam() const { 895 return data().HasDeclaredCopyConstructorWithConstParam || 896 (needsImplicitCopyConstructor() && 897 implicitCopyConstructorHasConstParam()); 898 } 899 900 /// \brief Whether this class has a user-declared move constructor or 901 /// assignment operator. 902 /// 903 /// When false, a move constructor and assignment operator may be 904 /// implicitly declared. 905 bool hasUserDeclaredMoveOperation() const { 906 return data().UserDeclaredSpecialMembers & 907 (SMF_MoveConstructor | SMF_MoveAssignment); 908 } 909 910 /// \brief Determine whether this class has had a move constructor 911 /// declared by the user. 912 bool hasUserDeclaredMoveConstructor() const { 913 return data().UserDeclaredSpecialMembers & SMF_MoveConstructor; 914 } 915 916 /// \brief Determine whether this class has a move constructor. 917 bool hasMoveConstructor() const { 918 return (data().DeclaredSpecialMembers & SMF_MoveConstructor) || 919 needsImplicitMoveConstructor(); 920 } 921 922 /// \brief Set that we attempted to declare an implicitly move 923 /// constructor, but overload resolution failed so we deleted it. 924 void setImplicitMoveConstructorIsDeleted() { 925 assert((data().DefaultedMoveConstructorIsDeleted || 926 needsOverloadResolutionForMoveConstructor()) && 927 "move constructor should not be deleted"); 928 data().DefaultedMoveConstructorIsDeleted = true; 929 } 930 931 /// \brief Determine whether this class should get an implicit move 932 /// constructor or if any existing special member function inhibits this. 933 bool needsImplicitMoveConstructor() const { 934 return !(data().DeclaredSpecialMembers & SMF_MoveConstructor) && 935 !hasUserDeclaredCopyConstructor() && 936 !hasUserDeclaredCopyAssignment() && 937 !hasUserDeclaredMoveAssignment() && 938 !hasUserDeclaredDestructor(); 939 } 940 941 /// \brief Determine whether we need to eagerly declare a defaulted move 942 /// constructor for this class. 943 bool needsOverloadResolutionForMoveConstructor() const { 944 return data().NeedOverloadResolutionForMoveConstructor; 945 } 946 947 /// \brief Determine whether this class has a user-declared copy assignment 948 /// operator. 949 /// 950 /// When false, a copy assigment operator will be implicitly declared. 951 bool hasUserDeclaredCopyAssignment() const { 952 return data().UserDeclaredSpecialMembers & SMF_CopyAssignment; 953 } 954 955 /// \brief Determine whether this class needs an implicit copy 956 /// assignment operator to be lazily declared. 957 bool needsImplicitCopyAssignment() const { 958 return !(data().DeclaredSpecialMembers & SMF_CopyAssignment); 959 } 960 961 /// \brief Determine whether we need to eagerly declare a defaulted copy 962 /// assignment operator for this class. 963 bool needsOverloadResolutionForCopyAssignment() const { 964 return data().HasMutableFields; 965 } 966 967 /// \brief Determine whether an implicit copy assignment operator for this 968 /// type would have a parameter with a const-qualified reference type. 969 bool implicitCopyAssignmentHasConstParam() const { 970 return data().ImplicitCopyAssignmentHasConstParam; 971 } 972 973 /// \brief Determine whether this class has a copy assignment operator with 974 /// a parameter type which is a reference to a const-qualified type or is not 975 /// a reference. 976 bool hasCopyAssignmentWithConstParam() const { 977 return data().HasDeclaredCopyAssignmentWithConstParam || 978 (needsImplicitCopyAssignment() && 979 implicitCopyAssignmentHasConstParam()); 980 } 981 982 /// \brief Determine whether this class has had a move assignment 983 /// declared by the user. 984 bool hasUserDeclaredMoveAssignment() const { 985 return data().UserDeclaredSpecialMembers & SMF_MoveAssignment; 986 } 987 988 /// \brief Determine whether this class has a move assignment operator. 989 bool hasMoveAssignment() const { 990 return (data().DeclaredSpecialMembers & SMF_MoveAssignment) || 991 needsImplicitMoveAssignment(); 992 } 993 994 /// \brief Set that we attempted to declare an implicit move assignment 995 /// operator, but overload resolution failed so we deleted it. 996 void setImplicitMoveAssignmentIsDeleted() { 997 assert((data().DefaultedMoveAssignmentIsDeleted || 998 needsOverloadResolutionForMoveAssignment()) && 999 "move assignment should not be deleted"); 1000 data().DefaultedMoveAssignmentIsDeleted = true; 1001 } 1002 1003 /// \brief Determine whether this class should get an implicit move 1004 /// assignment operator or if any existing special member function inhibits 1005 /// this. 1006 bool needsImplicitMoveAssignment() const { 1007 return !(data().DeclaredSpecialMembers & SMF_MoveAssignment) && 1008 !hasUserDeclaredCopyConstructor() && 1009 !hasUserDeclaredCopyAssignment() && 1010 !hasUserDeclaredMoveConstructor() && 1011 !hasUserDeclaredDestructor() && 1012 // C++1z [expr.prim.lambda]p21: "the closure type has a deleted copy 1013 // assignment operator". The intent is that this counts as a user 1014 // declared copy assignment, but we do not model it that way. 1015 !isLambda(); 1016 } 1017 1018 /// \brief Determine whether we need to eagerly declare a move assignment 1019 /// operator for this class. 1020 bool needsOverloadResolutionForMoveAssignment() const { 1021 return data().NeedOverloadResolutionForMoveAssignment; 1022 } 1023 1024 /// \brief Determine whether this class has a user-declared destructor. 1025 /// 1026 /// When false, a destructor will be implicitly declared. 1027 bool hasUserDeclaredDestructor() const { 1028 return data().UserDeclaredSpecialMembers & SMF_Destructor; 1029 } 1030 1031 /// \brief Determine whether this class needs an implicit destructor to 1032 /// be lazily declared. 1033 bool needsImplicitDestructor() const { 1034 return !(data().DeclaredSpecialMembers & SMF_Destructor); 1035 } 1036 1037 /// \brief Determine whether we need to eagerly declare a destructor for this 1038 /// class. 1039 bool needsOverloadResolutionForDestructor() const { 1040 return data().NeedOverloadResolutionForDestructor; 1041 } 1042 1043 /// \brief Determine whether this class describes a lambda function object. 1044 bool isLambda() const { 1045 // An update record can't turn a non-lambda into a lambda. 1046 auto *DD = DefinitionData; 1047 return DD && DD->IsLambda; 1048 } 1049 1050 /// \brief Determine whether this class describes a generic 1051 /// lambda function object (i.e. function call operator is 1052 /// a template). 1053 bool isGenericLambda() const; 1054 1055 /// \brief Retrieve the lambda call operator of the closure type 1056 /// if this is a closure type. 1057 CXXMethodDecl *getLambdaCallOperator() const; 1058 1059 /// \brief Retrieve the lambda static invoker, the address of which 1060 /// is returned by the conversion operator, and the body of which 1061 /// is forwarded to the lambda call operator. 1062 CXXMethodDecl *getLambdaStaticInvoker() const; 1063 1064 /// \brief Retrieve the generic lambda's template parameter list. 1065 /// Returns null if the class does not represent a lambda or a generic 1066 /// lambda. 1067 TemplateParameterList *getGenericLambdaTemplateParameterList() const; 1068 1069 LambdaCaptureDefault getLambdaCaptureDefault() const { 1070 assert(isLambda()); 1071 return static_cast<LambdaCaptureDefault>(getLambdaData().CaptureDefault); 1072 } 1073 1074 /// \brief For a closure type, retrieve the mapping from captured 1075 /// variables and \c this to the non-static data members that store the 1076 /// values or references of the captures. 1077 /// 1078 /// \param Captures Will be populated with the mapping from captured 1079 /// variables to the corresponding fields. 1080 /// 1081 /// \param ThisCapture Will be set to the field declaration for the 1082 /// \c this capture. 1083 /// 1084 /// \note No entries will be added for init-captures, as they do not capture 1085 /// variables. 1086 void getCaptureFields(llvm::DenseMap<const VarDecl *, FieldDecl *> &Captures, 1087 FieldDecl *&ThisCapture) const; 1088 1089 typedef const LambdaCapture *capture_const_iterator; 1090 typedef llvm::iterator_range<capture_const_iterator> capture_const_range; 1091 1092 capture_const_range captures() const { 1093 return capture_const_range(captures_begin(), captures_end()); 1094 } 1095 capture_const_iterator captures_begin() const { 1096 return isLambda() ? getLambdaData().Captures : nullptr; 1097 } 1098 capture_const_iterator captures_end() const { 1099 return isLambda() ? captures_begin() + getLambdaData().NumCaptures 1100 : nullptr; 1101 } 1102 1103 typedef UnresolvedSetIterator conversion_iterator; 1104 conversion_iterator conversion_begin() const { 1105 return data().Conversions.get(getASTContext()).begin(); 1106 } 1107 conversion_iterator conversion_end() const { 1108 return data().Conversions.get(getASTContext()).end(); 1109 } 1110 1111 /// Removes a conversion function from this class. The conversion 1112 /// function must currently be a member of this class. Furthermore, 1113 /// this class must currently be in the process of being defined. 1114 void removeConversion(const NamedDecl *Old); 1115 1116 /// \brief Get all conversion functions visible in current class, 1117 /// including conversion function templates. 1118 llvm::iterator_range<conversion_iterator> getVisibleConversionFunctions(); 1119 1120 /// Determine whether this class is an aggregate (C++ [dcl.init.aggr]), 1121 /// which is a class with no user-declared constructors, no private 1122 /// or protected non-static data members, no base classes, and no virtual 1123 /// functions (C++ [dcl.init.aggr]p1). 1124 bool isAggregate() const { return data().Aggregate; } 1125 1126 /// \brief Whether this class has any in-class initializers 1127 /// for non-static data members (including those in anonymous unions or 1128 /// structs). 1129 bool hasInClassInitializer() const { return data().HasInClassInitializer; } 1130 1131 /// \brief Whether this class or any of its subobjects has any members of 1132 /// reference type which would make value-initialization ill-formed. 1133 /// 1134 /// Per C++03 [dcl.init]p5: 1135 /// - if T is a non-union class type without a user-declared constructor, 1136 /// then every non-static data member and base-class component of T is 1137 /// value-initialized [...] A program that calls for [...] 1138 /// value-initialization of an entity of reference type is ill-formed. 1139 bool hasUninitializedReferenceMember() const { 1140 return !isUnion() && !hasUserDeclaredConstructor() && 1141 data().HasUninitializedReferenceMember; 1142 } 1143 1144 /// \brief Whether this class is a POD-type (C++ [class]p4) 1145 /// 1146 /// For purposes of this function a class is POD if it is an aggregate 1147 /// that has no non-static non-POD data members, no reference data 1148 /// members, no user-defined copy assignment operator and no 1149 /// user-defined destructor. 1150 /// 1151 /// Note that this is the C++ TR1 definition of POD. 1152 bool isPOD() const { return data().PlainOldData; } 1153 1154 /// \brief True if this class is C-like, without C++-specific features, e.g. 1155 /// it contains only public fields, no bases, tag kind is not 'class', etc. 1156 bool isCLike() const; 1157 1158 /// \brief Determine whether this is an empty class in the sense of 1159 /// (C++11 [meta.unary.prop]). 1160 /// 1161 /// The CXXRecordDecl is a class type, but not a union type, 1162 /// with no non-static data members other than bit-fields of length 0, 1163 /// no virtual member functions, no virtual base classes, 1164 /// and no base class B for which is_empty<B>::value is false. 1165 /// 1166 /// \note This does NOT include a check for union-ness. 1167 bool isEmpty() const { return data().Empty; } 1168 1169 /// \brief Determine whether this class has direct non-static data members. 1170 bool hasDirectFields() const { 1171 auto &D = data(); 1172 return D.HasPublicFields || D.HasProtectedFields || D.HasPrivateFields; 1173 } 1174 1175 /// Whether this class is polymorphic (C++ [class.virtual]), 1176 /// which means that the class contains or inherits a virtual function. 1177 bool isPolymorphic() const { return data().Polymorphic; } 1178 1179 /// \brief Determine whether this class has a pure virtual function. 1180 /// 1181 /// The class is is abstract per (C++ [class.abstract]p2) if it declares 1182 /// a pure virtual function or inherits a pure virtual function that is 1183 /// not overridden. 1184 bool isAbstract() const { return data().Abstract; } 1185 1186 /// \brief Determine whether this class has standard layout per 1187 /// (C++ [class]p7) 1188 bool isStandardLayout() const { return data().IsStandardLayout; } 1189 1190 /// \brief Determine whether this class, or any of its class subobjects, 1191 /// contains a mutable field. 1192 bool hasMutableFields() const { return data().HasMutableFields; } 1193 1194 /// \brief Determine whether this class has any variant members. 1195 bool hasVariantMembers() const { return data().HasVariantMembers; } 1196 1197 /// \brief Determine whether this class has a trivial default constructor 1198 /// (C++11 [class.ctor]p5). 1199 bool hasTrivialDefaultConstructor() const { 1200 return hasDefaultConstructor() && 1201 (data().HasTrivialSpecialMembers & SMF_DefaultConstructor); 1202 } 1203 1204 /// \brief Determine whether this class has a non-trivial default constructor 1205 /// (C++11 [class.ctor]p5). 1206 bool hasNonTrivialDefaultConstructor() const { 1207 return (data().DeclaredNonTrivialSpecialMembers & SMF_DefaultConstructor) || 1208 (needsImplicitDefaultConstructor() && 1209 !(data().HasTrivialSpecialMembers & SMF_DefaultConstructor)); 1210 } 1211 1212 /// \brief Determine whether this class has at least one constexpr constructor 1213 /// other than the copy or move constructors. 1214 bool hasConstexprNonCopyMoveConstructor() const { 1215 return data().HasConstexprNonCopyMoveConstructor || 1216 (needsImplicitDefaultConstructor() && 1217 defaultedDefaultConstructorIsConstexpr()); 1218 } 1219 1220 /// \brief Determine whether a defaulted default constructor for this class 1221 /// would be constexpr. 1222 bool defaultedDefaultConstructorIsConstexpr() const { 1223 return data().DefaultedDefaultConstructorIsConstexpr && 1224 (!isUnion() || hasInClassInitializer() || !hasVariantMembers()); 1225 } 1226 1227 /// \brief Determine whether this class has a constexpr default constructor. 1228 bool hasConstexprDefaultConstructor() const { 1229 return data().HasConstexprDefaultConstructor || 1230 (needsImplicitDefaultConstructor() && 1231 defaultedDefaultConstructorIsConstexpr()); 1232 } 1233 1234 /// \brief Determine whether this class has a trivial copy constructor 1235 /// (C++ [class.copy]p6, C++11 [class.copy]p12) 1236 bool hasTrivialCopyConstructor() const { 1237 return data().HasTrivialSpecialMembers & SMF_CopyConstructor; 1238 } 1239 1240 /// \brief Determine whether this class has a non-trivial copy constructor 1241 /// (C++ [class.copy]p6, C++11 [class.copy]p12) 1242 bool hasNonTrivialCopyConstructor() const { 1243 return data().DeclaredNonTrivialSpecialMembers & SMF_CopyConstructor || 1244 !hasTrivialCopyConstructor(); 1245 } 1246 1247 /// \brief Determine whether this class has a trivial move constructor 1248 /// (C++11 [class.copy]p12) 1249 bool hasTrivialMoveConstructor() const { 1250 return hasMoveConstructor() && 1251 (data().HasTrivialSpecialMembers & SMF_MoveConstructor); 1252 } 1253 1254 /// \brief Determine whether this class has a non-trivial move constructor 1255 /// (C++11 [class.copy]p12) 1256 bool hasNonTrivialMoveConstructor() const { 1257 return (data().DeclaredNonTrivialSpecialMembers & SMF_MoveConstructor) || 1258 (needsImplicitMoveConstructor() && 1259 !(data().HasTrivialSpecialMembers & SMF_MoveConstructor)); 1260 } 1261 1262 /// \brief Determine whether this class has a trivial copy assignment operator 1263 /// (C++ [class.copy]p11, C++11 [class.copy]p25) 1264 bool hasTrivialCopyAssignment() const { 1265 return data().HasTrivialSpecialMembers & SMF_CopyAssignment; 1266 } 1267 1268 /// \brief Determine whether this class has a non-trivial copy assignment 1269 /// operator (C++ [class.copy]p11, C++11 [class.copy]p25) 1270 bool hasNonTrivialCopyAssignment() const { 1271 return data().DeclaredNonTrivialSpecialMembers & SMF_CopyAssignment || 1272 !hasTrivialCopyAssignment(); 1273 } 1274 1275 /// \brief Determine whether this class has a trivial move assignment operator 1276 /// (C++11 [class.copy]p25) 1277 bool hasTrivialMoveAssignment() const { 1278 return hasMoveAssignment() && 1279 (data().HasTrivialSpecialMembers & SMF_MoveAssignment); 1280 } 1281 1282 /// \brief Determine whether this class has a non-trivial move assignment 1283 /// operator (C++11 [class.copy]p25) 1284 bool hasNonTrivialMoveAssignment() const { 1285 return (data().DeclaredNonTrivialSpecialMembers & SMF_MoveAssignment) || 1286 (needsImplicitMoveAssignment() && 1287 !(data().HasTrivialSpecialMembers & SMF_MoveAssignment)); 1288 } 1289 1290 /// \brief Determine whether this class has a trivial destructor 1291 /// (C++ [class.dtor]p3) 1292 bool hasTrivialDestructor() const { 1293 return data().HasTrivialSpecialMembers & SMF_Destructor; 1294 } 1295 1296 /// \brief Determine whether this class has a non-trivial destructor 1297 /// (C++ [class.dtor]p3) 1298 bool hasNonTrivialDestructor() const { 1299 return !(data().HasTrivialSpecialMembers & SMF_Destructor); 1300 } 1301 1302 /// \brief Determine whether declaring a const variable with this type is ok 1303 /// per core issue 253. 1304 bool allowConstDefaultInit() const { 1305 return !data().HasUninitializedFields || 1306 !(data().HasDefaultedDefaultConstructor || 1307 needsImplicitDefaultConstructor()); 1308 } 1309 1310 /// \brief Determine whether this class has a destructor which has no 1311 /// semantic effect. 1312 /// 1313 /// Any such destructor will be trivial, public, defaulted and not deleted, 1314 /// and will call only irrelevant destructors. 1315 bool hasIrrelevantDestructor() const { 1316 return data().HasIrrelevantDestructor; 1317 } 1318 1319 /// \brief Determine whether this class has a non-literal or/ volatile type 1320 /// non-static data member or base class. 1321 bool hasNonLiteralTypeFieldsOrBases() const { 1322 return data().HasNonLiteralTypeFieldsOrBases; 1323 } 1324 1325 /// \brief Determine whether this class has a using-declaration that names 1326 /// a user-declared base class constructor. 1327 bool hasInheritedConstructor() const { 1328 return data().HasInheritedConstructor; 1329 } 1330 1331 /// \brief Determine whether this class has a using-declaration that names 1332 /// a base class assignment operator. 1333 bool hasInheritedAssignment() const { 1334 return data().HasInheritedAssignment; 1335 } 1336 1337 /// \brief Determine whether this class is considered trivially copyable per 1338 /// (C++11 [class]p6). 1339 bool isTriviallyCopyable() const; 1340 1341 /// \brief Determine whether this class is considered trivial. 1342 /// 1343 /// C++11 [class]p6: 1344 /// "A trivial class is a class that has a trivial default constructor and 1345 /// is trivially copiable." 1346 bool isTrivial() const { 1347 return isTriviallyCopyable() && hasTrivialDefaultConstructor(); 1348 } 1349 1350 /// \brief Determine whether this class is a literal type. 1351 /// 1352 /// C++11 [basic.types]p10: 1353 /// A class type that has all the following properties: 1354 /// - it has a trivial destructor 1355 /// - every constructor call and full-expression in the 1356 /// brace-or-equal-intializers for non-static data members (if any) is 1357 /// a constant expression. 1358 /// - it is an aggregate type or has at least one constexpr constructor 1359 /// or constructor template that is not a copy or move constructor, and 1360 /// - all of its non-static data members and base classes are of literal 1361 /// types 1362 /// 1363 /// We resolve DR1361 by ignoring the second bullet. We resolve DR1452 by 1364 /// treating types with trivial default constructors as literal types. 1365 /// 1366 /// Only in C++1z and beyond, are lambdas literal types. 1367 bool isLiteral() const { 1368 return hasTrivialDestructor() && 1369 (!isLambda() || getASTContext().getLangOpts().CPlusPlus1z) && 1370 !hasNonLiteralTypeFieldsOrBases() && 1371 (isAggregate() || isLambda() || 1372 hasConstexprNonCopyMoveConstructor() || 1373 hasTrivialDefaultConstructor()); 1374 } 1375 1376 /// \brief If this record is an instantiation of a member class, 1377 /// retrieves the member class from which it was instantiated. 1378 /// 1379 /// This routine will return non-null for (non-templated) member 1380 /// classes of class templates. For example, given: 1381 /// 1382 /// \code 1383 /// template<typename T> 1384 /// struct X { 1385 /// struct A { }; 1386 /// }; 1387 /// \endcode 1388 /// 1389 /// The declaration for X<int>::A is a (non-templated) CXXRecordDecl 1390 /// whose parent is the class template specialization X<int>. For 1391 /// this declaration, getInstantiatedFromMemberClass() will return 1392 /// the CXXRecordDecl X<T>::A. When a complete definition of 1393 /// X<int>::A is required, it will be instantiated from the 1394 /// declaration returned by getInstantiatedFromMemberClass(). 1395 CXXRecordDecl *getInstantiatedFromMemberClass() const; 1396 1397 /// \brief If this class is an instantiation of a member class of a 1398 /// class template specialization, retrieves the member specialization 1399 /// information. 1400 MemberSpecializationInfo *getMemberSpecializationInfo() const; 1401 1402 /// \brief Specify that this record is an instantiation of the 1403 /// member class \p RD. 1404 void setInstantiationOfMemberClass(CXXRecordDecl *RD, 1405 TemplateSpecializationKind TSK); 1406 1407 /// \brief Retrieves the class template that is described by this 1408 /// class declaration. 1409 /// 1410 /// Every class template is represented as a ClassTemplateDecl and a 1411 /// CXXRecordDecl. The former contains template properties (such as 1412 /// the template parameter lists) while the latter contains the 1413 /// actual description of the template's 1414 /// contents. ClassTemplateDecl::getTemplatedDecl() retrieves the 1415 /// CXXRecordDecl that from a ClassTemplateDecl, while 1416 /// getDescribedClassTemplate() retrieves the ClassTemplateDecl from 1417 /// a CXXRecordDecl. 1418 ClassTemplateDecl *getDescribedClassTemplate() const; 1419 1420 void setDescribedClassTemplate(ClassTemplateDecl *Template); 1421 1422 /// \brief Determine whether this particular class is a specialization or 1423 /// instantiation of a class template or member class of a class template, 1424 /// and how it was instantiated or specialized. 1425 TemplateSpecializationKind getTemplateSpecializationKind() const; 1426 1427 /// \brief Set the kind of specialization or template instantiation this is. 1428 void setTemplateSpecializationKind(TemplateSpecializationKind TSK); 1429 1430 /// \brief Retrieve the record declaration from which this record could be 1431 /// instantiated. Returns null if this class is not a template instantiation. 1432 const CXXRecordDecl *getTemplateInstantiationPattern() const; 1433 1434 CXXRecordDecl *getTemplateInstantiationPattern() { 1435 return const_cast<CXXRecordDecl *>(const_cast<const CXXRecordDecl *>(this) 1436 ->getTemplateInstantiationPattern()); 1437 } 1438 1439 /// \brief Returns the destructor decl for this class. 1440 CXXDestructorDecl *getDestructor() const; 1441 1442 /// \brief Returns true if the class destructor, or any implicitly invoked 1443 /// destructors are marked noreturn. 1444 bool isAnyDestructorNoReturn() const; 1445 1446 /// \brief If the class is a local class [class.local], returns 1447 /// the enclosing function declaration. 1448 const FunctionDecl *isLocalClass() const { 1449 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(getDeclContext())) 1450 return RD->isLocalClass(); 1451 1452 return dyn_cast<FunctionDecl>(getDeclContext()); 1453 } 1454 1455 FunctionDecl *isLocalClass() { 1456 return const_cast<FunctionDecl*>( 1457 const_cast<const CXXRecordDecl*>(this)->isLocalClass()); 1458 } 1459 1460 /// \brief Determine whether this dependent class is a current instantiation, 1461 /// when viewed from within the given context. 1462 bool isCurrentInstantiation(const DeclContext *CurContext) const; 1463 1464 /// \brief Determine whether this class is derived from the class \p Base. 1465 /// 1466 /// This routine only determines whether this class is derived from \p Base, 1467 /// but does not account for factors that may make a Derived -> Base class 1468 /// ill-formed, such as private/protected inheritance or multiple, ambiguous 1469 /// base class subobjects. 1470 /// 1471 /// \param Base the base class we are searching for. 1472 /// 1473 /// \returns true if this class is derived from Base, false otherwise. 1474 bool isDerivedFrom(const CXXRecordDecl *Base) const; 1475 1476 /// \brief Determine whether this class is derived from the type \p Base. 1477 /// 1478 /// This routine only determines whether this class is derived from \p Base, 1479 /// but does not account for factors that may make a Derived -> Base class 1480 /// ill-formed, such as private/protected inheritance or multiple, ambiguous 1481 /// base class subobjects. 1482 /// 1483 /// \param Base the base class we are searching for. 1484 /// 1485 /// \param Paths will contain the paths taken from the current class to the 1486 /// given \p Base class. 1487 /// 1488 /// \returns true if this class is derived from \p Base, false otherwise. 1489 /// 1490 /// \todo add a separate parameter to configure IsDerivedFrom, rather than 1491 /// tangling input and output in \p Paths 1492 bool isDerivedFrom(const CXXRecordDecl *Base, CXXBasePaths &Paths) const; 1493 1494 /// \brief Determine whether this class is virtually derived from 1495 /// the class \p Base. 1496 /// 1497 /// This routine only determines whether this class is virtually 1498 /// derived from \p Base, but does not account for factors that may 1499 /// make a Derived -> Base class ill-formed, such as 1500 /// private/protected inheritance or multiple, ambiguous base class 1501 /// subobjects. 1502 /// 1503 /// \param Base the base class we are searching for. 1504 /// 1505 /// \returns true if this class is virtually derived from Base, 1506 /// false otherwise. 1507 bool isVirtuallyDerivedFrom(const CXXRecordDecl *Base) const; 1508 1509 /// \brief Determine whether this class is provably not derived from 1510 /// the type \p Base. 1511 bool isProvablyNotDerivedFrom(const CXXRecordDecl *Base) const; 1512 1513 /// \brief Function type used by forallBases() as a callback. 1514 /// 1515 /// \param BaseDefinition the definition of the base class 1516 /// 1517 /// \returns true if this base matched the search criteria 1518 typedef llvm::function_ref<bool(const CXXRecordDecl *BaseDefinition)> 1519 ForallBasesCallback; 1520 1521 /// \brief Determines if the given callback holds for all the direct 1522 /// or indirect base classes of this type. 1523 /// 1524 /// The class itself does not count as a base class. This routine 1525 /// returns false if the class has non-computable base classes. 1526 /// 1527 /// \param BaseMatches Callback invoked for each (direct or indirect) base 1528 /// class of this type, or if \p AllowShortCircuit is true then until a call 1529 /// returns false. 1530 /// 1531 /// \param AllowShortCircuit if false, forces the callback to be called 1532 /// for every base class, even if a dependent or non-matching base was 1533 /// found. 1534 bool forallBases(ForallBasesCallback BaseMatches, 1535 bool AllowShortCircuit = true) const; 1536 1537 /// \brief Function type used by lookupInBases() to determine whether a 1538 /// specific base class subobject matches the lookup criteria. 1539 /// 1540 /// \param Specifier the base-class specifier that describes the inheritance 1541 /// from the base class we are trying to match. 1542 /// 1543 /// \param Path the current path, from the most-derived class down to the 1544 /// base named by the \p Specifier. 1545 /// 1546 /// \returns true if this base matched the search criteria, false otherwise. 1547 typedef llvm::function_ref<bool(const CXXBaseSpecifier *Specifier, 1548 CXXBasePath &Path)> BaseMatchesCallback; 1549 1550 /// \brief Look for entities within the base classes of this C++ class, 1551 /// transitively searching all base class subobjects. 1552 /// 1553 /// This routine uses the callback function \p BaseMatches to find base 1554 /// classes meeting some search criteria, walking all base class subobjects 1555 /// and populating the given \p Paths structure with the paths through the 1556 /// inheritance hierarchy that resulted in a match. On a successful search, 1557 /// the \p Paths structure can be queried to retrieve the matching paths and 1558 /// to determine if there were any ambiguities. 1559 /// 1560 /// \param BaseMatches callback function used to determine whether a given 1561 /// base matches the user-defined search criteria. 1562 /// 1563 /// \param Paths used to record the paths from this class to its base class 1564 /// subobjects that match the search criteria. 1565 /// 1566 /// \param LookupInDependent can be set to true to extend the search to 1567 /// dependent base classes. 1568 /// 1569 /// \returns true if there exists any path from this class to a base class 1570 /// subobject that matches the search criteria. 1571 bool lookupInBases(BaseMatchesCallback BaseMatches, CXXBasePaths &Paths, 1572 bool LookupInDependent = false) const; 1573 1574 /// \brief Base-class lookup callback that determines whether the given 1575 /// base class specifier refers to a specific class declaration. 1576 /// 1577 /// This callback can be used with \c lookupInBases() to determine whether 1578 /// a given derived class has is a base class subobject of a particular type. 1579 /// The base record pointer should refer to the canonical CXXRecordDecl of the 1580 /// base class that we are searching for. 1581 static bool FindBaseClass(const CXXBaseSpecifier *Specifier, 1582 CXXBasePath &Path, const CXXRecordDecl *BaseRecord); 1583 1584 /// \brief Base-class lookup callback that determines whether the 1585 /// given base class specifier refers to a specific class 1586 /// declaration and describes virtual derivation. 1587 /// 1588 /// This callback can be used with \c lookupInBases() to determine 1589 /// whether a given derived class has is a virtual base class 1590 /// subobject of a particular type. The base record pointer should 1591 /// refer to the canonical CXXRecordDecl of the base class that we 1592 /// are searching for. 1593 static bool FindVirtualBaseClass(const CXXBaseSpecifier *Specifier, 1594 CXXBasePath &Path, 1595 const CXXRecordDecl *BaseRecord); 1596 1597 /// \brief Base-class lookup callback that determines whether there exists 1598 /// a tag with the given name. 1599 /// 1600 /// This callback can be used with \c lookupInBases() to find tag members 1601 /// of the given name within a C++ class hierarchy. 1602 static bool FindTagMember(const CXXBaseSpecifier *Specifier, 1603 CXXBasePath &Path, DeclarationName Name); 1604 1605 /// \brief Base-class lookup callback that determines whether there exists 1606 /// a member with the given name. 1607 /// 1608 /// This callback can be used with \c lookupInBases() to find members 1609 /// of the given name within a C++ class hierarchy. 1610 static bool FindOrdinaryMember(const CXXBaseSpecifier *Specifier, 1611 CXXBasePath &Path, DeclarationName Name); 1612 1613 /// \brief Base-class lookup callback that determines whether there exists 1614 /// a member with the given name. 1615 /// 1616 /// This callback can be used with \c lookupInBases() to find members 1617 /// of the given name within a C++ class hierarchy, including dependent 1618 /// classes. 1619 static bool 1620 FindOrdinaryMemberInDependentClasses(const CXXBaseSpecifier *Specifier, 1621 CXXBasePath &Path, DeclarationName Name); 1622 1623 /// \brief Base-class lookup callback that determines whether there exists 1624 /// an OpenMP declare reduction member with the given name. 1625 /// 1626 /// This callback can be used with \c lookupInBases() to find members 1627 /// of the given name within a C++ class hierarchy. 1628 static bool FindOMPReductionMember(const CXXBaseSpecifier *Specifier, 1629 CXXBasePath &Path, DeclarationName Name); 1630 1631 /// \brief Base-class lookup callback that determines whether there exists 1632 /// a member with the given name that can be used in a nested-name-specifier. 1633 /// 1634 /// This callback can be used with \c lookupInBases() to find members of 1635 /// the given name within a C++ class hierarchy that can occur within 1636 /// nested-name-specifiers. 1637 static bool FindNestedNameSpecifierMember(const CXXBaseSpecifier *Specifier, 1638 CXXBasePath &Path, 1639 DeclarationName Name); 1640 1641 /// \brief Retrieve the final overriders for each virtual member 1642 /// function in the class hierarchy where this class is the 1643 /// most-derived class in the class hierarchy. 1644 void getFinalOverriders(CXXFinalOverriderMap &FinaOverriders) const; 1645 1646 /// \brief Get the indirect primary bases for this class. 1647 void getIndirectPrimaryBases(CXXIndirectPrimaryBaseSet& Bases) const; 1648 1649 /// Performs an imprecise lookup of a dependent name in this class. 1650 /// 1651 /// This function does not follow strict semantic rules and should be used 1652 /// only when lookup rules can be relaxed, e.g. indexing. 1653 std::vector<const NamedDecl *> 1654 lookupDependentName(const DeclarationName &Name, 1655 llvm::function_ref<bool(const NamedDecl *ND)> Filter); 1656 1657 /// Renders and displays an inheritance diagram 1658 /// for this C++ class and all of its base classes (transitively) using 1659 /// GraphViz. 1660 void viewInheritance(ASTContext& Context) const; 1661 1662 /// \brief Calculates the access of a decl that is reached 1663 /// along a path. 1664 static AccessSpecifier MergeAccess(AccessSpecifier PathAccess, 1665 AccessSpecifier DeclAccess) { 1666 assert(DeclAccess != AS_none); 1667 if (DeclAccess == AS_private) return AS_none; 1668 return (PathAccess > DeclAccess ? PathAccess : DeclAccess); 1669 } 1670 1671 /// \brief Indicates that the declaration of a defaulted or deleted special 1672 /// member function is now complete. 1673 void finishedDefaultedOrDeletedMember(CXXMethodDecl *MD); 1674 1675 /// \brief Indicates that the definition of this class is now complete. 1676 void completeDefinition() override; 1677 1678 /// \brief Indicates that the definition of this class is now complete, 1679 /// and provides a final overrider map to help determine 1680 /// 1681 /// \param FinalOverriders The final overrider map for this class, which can 1682 /// be provided as an optimization for abstract-class checking. If NULL, 1683 /// final overriders will be computed if they are needed to complete the 1684 /// definition. 1685 void completeDefinition(CXXFinalOverriderMap *FinalOverriders); 1686 1687 /// \brief Determine whether this class may end up being abstract, even though 1688 /// it is not yet known to be abstract. 1689 /// 1690 /// \returns true if this class is not known to be abstract but has any 1691 /// base classes that are abstract. In this case, \c completeDefinition() 1692 /// will need to compute final overriders to determine whether the class is 1693 /// actually abstract. 1694 bool mayBeAbstract() const; 1695 1696 /// \brief If this is the closure type of a lambda expression, retrieve the 1697 /// number to be used for name mangling in the Itanium C++ ABI. 1698 /// 1699 /// Zero indicates that this closure type has internal linkage, so the 1700 /// mangling number does not matter, while a non-zero value indicates which 1701 /// lambda expression this is in this particular context. 1702 unsigned getLambdaManglingNumber() const { 1703 assert(isLambda() && "Not a lambda closure type!"); 1704 return getLambdaData().ManglingNumber; 1705 } 1706 1707 /// \brief Retrieve the declaration that provides additional context for a 1708 /// lambda, when the normal declaration context is not specific enough. 1709 /// 1710 /// Certain contexts (default arguments of in-class function parameters and 1711 /// the initializers of data members) have separate name mangling rules for 1712 /// lambdas within the Itanium C++ ABI. For these cases, this routine provides 1713 /// the declaration in which the lambda occurs, e.g., the function parameter 1714 /// or the non-static data member. Otherwise, it returns NULL to imply that 1715 /// the declaration context suffices. 1716 Decl *getLambdaContextDecl() const; 1717 1718 /// \brief Set the mangling number and context declaration for a lambda 1719 /// class. 1720 void setLambdaMangling(unsigned ManglingNumber, Decl *ContextDecl) { 1721 getLambdaData().ManglingNumber = ManglingNumber; 1722 getLambdaData().ContextDecl = ContextDecl; 1723 } 1724 1725 /// \brief Returns the inheritance model used for this record. 1726 MSInheritanceAttr::Spelling getMSInheritanceModel() const; 1727 /// \brief Calculate what the inheritance model would be for this class. 1728 MSInheritanceAttr::Spelling calculateInheritanceModel() const; 1729 1730 /// In the Microsoft C++ ABI, use zero for the field offset of a null data 1731 /// member pointer if we can guarantee that zero is not a valid field offset, 1732 /// or if the member pointer has multiple fields. Polymorphic classes have a 1733 /// vfptr at offset zero, so we can use zero for null. If there are multiple 1734 /// fields, we can use zero even if it is a valid field offset because 1735 /// null-ness testing will check the other fields. 1736 bool nullFieldOffsetIsZero() const { 1737 return !MSInheritanceAttr::hasOnlyOneField(/*IsMemberFunction=*/false, 1738 getMSInheritanceModel()) || 1739 (hasDefinition() && isPolymorphic()); 1740 } 1741 1742 /// \brief Controls when vtordisps will be emitted if this record is used as a 1743 /// virtual base. 1744 MSVtorDispAttr::Mode getMSVtorDispMode() const; 1745 1746 /// \brief Determine whether this lambda expression was known to be dependent 1747 /// at the time it was created, even if its context does not appear to be 1748 /// dependent. 1749 /// 1750 /// This flag is a workaround for an issue with parsing, where default 1751 /// arguments are parsed before their enclosing function declarations have 1752 /// been created. This means that any lambda expressions within those 1753 /// default arguments will have as their DeclContext the context enclosing 1754 /// the function declaration, which may be non-dependent even when the 1755 /// function declaration itself is dependent. This flag indicates when we 1756 /// know that the lambda is dependent despite that. 1757 bool isDependentLambda() const { 1758 return isLambda() && getLambdaData().Dependent; 1759 } 1760 1761 TypeSourceInfo *getLambdaTypeInfo() const { 1762 return getLambdaData().MethodTyInfo; 1763 } 1764 1765 static bool classof(const Decl *D) { return classofKind(D->getKind()); } 1766 static bool classofKind(Kind K) { 1767 return K >= firstCXXRecord && K <= lastCXXRecord; 1768 } 1769 1770 friend class ASTDeclReader; 1771 friend class ASTDeclWriter; 1772 friend class ASTRecordWriter; 1773 friend class ASTReader; 1774 friend class ASTWriter; 1775 }; 1776 1777 /// \brief Represents a C++ deduction guide declaration. 1778 /// 1779 /// \code 1780 /// template<typename T> struct A { A(); A(T); }; 1781 /// A() -> A<int>; 1782 /// \endcode 1783 /// 1784 /// In this example, there will be an explicit deduction guide from the 1785 /// second line, and implicit deduction guide templates synthesized from 1786 /// the constructors of \c A. 1787 class CXXDeductionGuideDecl : public FunctionDecl { 1788 void anchor() override; 1789 private: 1790 CXXDeductionGuideDecl(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, 1791 bool IsExplicit, const DeclarationNameInfo &NameInfo, 1792 QualType T, TypeSourceInfo *TInfo, 1793 SourceLocation EndLocation) 1794 : FunctionDecl(CXXDeductionGuide, C, DC, StartLoc, NameInfo, T, TInfo, 1795 SC_None, false, false) { 1796 if (EndLocation.isValid()) 1797 setRangeEnd(EndLocation); 1798 IsExplicitSpecified = IsExplicit; 1799 } 1800 1801 public: 1802 static CXXDeductionGuideDecl *Create(ASTContext &C, DeclContext *DC, 1803 SourceLocation StartLoc, bool IsExplicit, 1804 const DeclarationNameInfo &NameInfo, 1805 QualType T, TypeSourceInfo *TInfo, 1806 SourceLocation EndLocation); 1807 1808 static CXXDeductionGuideDecl *CreateDeserialized(ASTContext &C, unsigned ID); 1809 1810 /// Whether this deduction guide is explicit. 1811 bool isExplicit() const { return IsExplicitSpecified; } 1812 1813 /// Whether this deduction guide was declared with the 'explicit' specifier. 1814 bool isExplicitSpecified() const { return IsExplicitSpecified; } 1815 1816 /// Get the template for which this guide performs deduction. 1817 TemplateDecl *getDeducedTemplate() const { 1818 return getDeclName().getCXXDeductionGuideTemplate(); 1819 } 1820 1821 // Implement isa/cast/dyncast/etc. 1822 static bool classof(const Decl *D) { return classofKind(D->getKind()); } 1823 static bool classofKind(Kind K) { return K == CXXDeductionGuide; } 1824 1825 friend class ASTDeclReader; 1826 friend class ASTDeclWriter; 1827 }; 1828 1829 /// \brief Represents a static or instance method of a struct/union/class. 1830 /// 1831 /// In the terminology of the C++ Standard, these are the (static and 1832 /// non-static) member functions, whether virtual or not. 1833 class CXXMethodDecl : public FunctionDecl { 1834 void anchor() override; 1835 protected: 1836 CXXMethodDecl(Kind DK, ASTContext &C, CXXRecordDecl *RD, 1837 SourceLocation StartLoc, const DeclarationNameInfo &NameInfo, 1838 QualType T, TypeSourceInfo *TInfo, 1839 StorageClass SC, bool isInline, 1840 bool isConstexpr, SourceLocation EndLocation) 1841 : FunctionDecl(DK, C, RD, StartLoc, NameInfo, T, TInfo, 1842 SC, isInline, isConstexpr) { 1843 if (EndLocation.isValid()) 1844 setRangeEnd(EndLocation); 1845 } 1846 1847 public: 1848 static CXXMethodDecl *Create(ASTContext &C, CXXRecordDecl *RD, 1849 SourceLocation StartLoc, 1850 const DeclarationNameInfo &NameInfo, 1851 QualType T, TypeSourceInfo *TInfo, 1852 StorageClass SC, 1853 bool isInline, 1854 bool isConstexpr, 1855 SourceLocation EndLocation); 1856 1857 static CXXMethodDecl *CreateDeserialized(ASTContext &C, unsigned ID); 1858 1859 bool isStatic() const; 1860 bool isInstance() const { return !isStatic(); } 1861 1862 /// Returns true if the given operator is implicitly static in a record 1863 /// context. 1864 static bool isStaticOverloadedOperator(OverloadedOperatorKind OOK) { 1865 // [class.free]p1: 1866 // Any allocation function for a class T is a static member 1867 // (even if not explicitly declared static). 1868 // [class.free]p6 Any deallocation function for a class X is a static member 1869 // (even if not explicitly declared static). 1870 return OOK == OO_New || OOK == OO_Array_New || OOK == OO_Delete || 1871 OOK == OO_Array_Delete; 1872 } 1873 1874 bool isConst() const { return getType()->castAs<FunctionType>()->isConst(); } 1875 bool isVolatile() const { return getType()->castAs<FunctionType>()->isVolatile(); } 1876 1877 bool isVirtual() const { 1878 CXXMethodDecl *CD = 1879 cast<CXXMethodDecl>(const_cast<CXXMethodDecl*>(this)->getCanonicalDecl()); 1880 1881 // Member function is virtual if it is marked explicitly so, or if it is 1882 // declared in __interface -- then it is automatically pure virtual. 1883 if (CD->isVirtualAsWritten() || CD->isPure()) 1884 return true; 1885 1886 return (CD->begin_overridden_methods() != CD->end_overridden_methods()); 1887 } 1888 1889 /// \brief Determine whether this is a usual deallocation function 1890 /// (C++ [basic.stc.dynamic.deallocation]p2), which is an overloaded 1891 /// delete or delete[] operator with a particular signature. 1892 bool isUsualDeallocationFunction() const; 1893 1894 /// \brief Determine whether this is a copy-assignment operator, regardless 1895 /// of whether it was declared implicitly or explicitly. 1896 bool isCopyAssignmentOperator() const; 1897 1898 /// \brief Determine whether this is a move assignment operator. 1899 bool isMoveAssignmentOperator() const; 1900 1901 CXXMethodDecl *getCanonicalDecl() override { 1902 return cast<CXXMethodDecl>(FunctionDecl::getCanonicalDecl()); 1903 } 1904 const CXXMethodDecl *getCanonicalDecl() const { 1905 return const_cast<CXXMethodDecl*>(this)->getCanonicalDecl(); 1906 } 1907 1908 CXXMethodDecl *getMostRecentDecl() { 1909 return cast<CXXMethodDecl>( 1910 static_cast<FunctionDecl *>(this)->getMostRecentDecl()); 1911 } 1912 const CXXMethodDecl *getMostRecentDecl() const { 1913 return const_cast<CXXMethodDecl*>(this)->getMostRecentDecl(); 1914 } 1915 1916 /// True if this method is user-declared and was not 1917 /// deleted or defaulted on its first declaration. 1918 bool isUserProvided() const { 1919 return !(isDeleted() || getCanonicalDecl()->isDefaulted()); 1920 } 1921 1922 /// 1923 void addOverriddenMethod(const CXXMethodDecl *MD); 1924 1925 typedef const CXXMethodDecl *const* method_iterator; 1926 1927 method_iterator begin_overridden_methods() const; 1928 method_iterator end_overridden_methods() const; 1929 unsigned size_overridden_methods() const; 1930 typedef ASTContext::overridden_method_range overridden_method_range; 1931 overridden_method_range overridden_methods() const; 1932 1933 /// Returns the parent of this method declaration, which 1934 /// is the class in which this method is defined. 1935 const CXXRecordDecl *getParent() const { 1936 return cast<CXXRecordDecl>(FunctionDecl::getParent()); 1937 } 1938 1939 /// Returns the parent of this method declaration, which 1940 /// is the class in which this method is defined. 1941 CXXRecordDecl *getParent() { 1942 return const_cast<CXXRecordDecl *>( 1943 cast<CXXRecordDecl>(FunctionDecl::getParent())); 1944 } 1945 1946 /// \brief Returns the type of the \c this pointer. 1947 /// 1948 /// Should only be called for instance (i.e., non-static) methods. 1949 QualType getThisType(ASTContext &C) const; 1950 1951 unsigned getTypeQualifiers() const { 1952 return getType()->getAs<FunctionProtoType>()->getTypeQuals(); 1953 } 1954 1955 /// \brief Retrieve the ref-qualifier associated with this method. 1956 /// 1957 /// In the following example, \c f() has an lvalue ref-qualifier, \c g() 1958 /// has an rvalue ref-qualifier, and \c h() has no ref-qualifier. 1959 /// @code 1960 /// struct X { 1961 /// void f() &; 1962 /// void g() &&; 1963 /// void h(); 1964 /// }; 1965 /// @endcode 1966 RefQualifierKind getRefQualifier() const { 1967 return getType()->getAs<FunctionProtoType>()->getRefQualifier(); 1968 } 1969 1970 bool hasInlineBody() const; 1971 1972 /// \brief Determine whether this is a lambda closure type's static member 1973 /// function that is used for the result of the lambda's conversion to 1974 /// function pointer (for a lambda with no captures). 1975 /// 1976 /// The function itself, if used, will have a placeholder body that will be 1977 /// supplied by IR generation to either forward to the function call operator 1978 /// or clone the function call operator. 1979 bool isLambdaStaticInvoker() const; 1980 1981 /// \brief Find the method in \p RD that corresponds to this one. 1982 /// 1983 /// Find if \p RD or one of the classes it inherits from override this method. 1984 /// If so, return it. \p RD is assumed to be a subclass of the class defining 1985 /// this method (or be the class itself), unless \p MayBeBase is set to true. 1986 CXXMethodDecl * 1987 getCorrespondingMethodInClass(const CXXRecordDecl *RD, 1988 bool MayBeBase = false); 1989 1990 const CXXMethodDecl * 1991 getCorrespondingMethodInClass(const CXXRecordDecl *RD, 1992 bool MayBeBase = false) const { 1993 return const_cast<CXXMethodDecl *>(this) 1994 ->getCorrespondingMethodInClass(RD, MayBeBase); 1995 } 1996 1997 // Implement isa/cast/dyncast/etc. 1998 static bool classof(const Decl *D) { return classofKind(D->getKind()); } 1999 static bool classofKind(Kind K) { 2000 return K >= firstCXXMethod && K <= lastCXXMethod; 2001 } 2002 }; 2003 2004 /// \brief Represents a C++ base or member initializer. 2005 /// 2006 /// This is part of a constructor initializer that 2007 /// initializes one non-static member variable or one base class. For 2008 /// example, in the following, both 'A(a)' and 'f(3.14159)' are member 2009 /// initializers: 2010 /// 2011 /// \code 2012 /// class A { }; 2013 /// class B : public A { 2014 /// float f; 2015 /// public: 2016 /// B(A& a) : A(a), f(3.14159) { } 2017 /// }; 2018 /// \endcode 2019 class CXXCtorInitializer final { 2020 /// \brief Either the base class name/delegating constructor type (stored as 2021 /// a TypeSourceInfo*), an normal field (FieldDecl), or an anonymous field 2022 /// (IndirectFieldDecl*) being initialized. 2023 llvm::PointerUnion3<TypeSourceInfo *, FieldDecl *, IndirectFieldDecl *> 2024 Initializee; 2025 2026 /// \brief The source location for the field name or, for a base initializer 2027 /// pack expansion, the location of the ellipsis. 2028 /// 2029 /// In the case of a delegating 2030 /// constructor, it will still include the type's source location as the 2031 /// Initializee points to the CXXConstructorDecl (to allow loop detection). 2032 SourceLocation MemberOrEllipsisLocation; 2033 2034 /// \brief The argument used to initialize the base or member, which may 2035 /// end up constructing an object (when multiple arguments are involved). 2036 Stmt *Init; 2037 2038 /// \brief Location of the left paren of the ctor-initializer. 2039 SourceLocation LParenLoc; 2040 2041 /// \brief Location of the right paren of the ctor-initializer. 2042 SourceLocation RParenLoc; 2043 2044 /// \brief If the initializee is a type, whether that type makes this 2045 /// a delegating initialization. 2046 unsigned IsDelegating : 1; 2047 2048 /// \brief If the initializer is a base initializer, this keeps track 2049 /// of whether the base is virtual or not. 2050 unsigned IsVirtual : 1; 2051 2052 /// \brief Whether or not the initializer is explicitly written 2053 /// in the sources. 2054 unsigned IsWritten : 1; 2055 2056 /// If IsWritten is true, then this number keeps track of the textual order 2057 /// of this initializer in the original sources, counting from 0. 2058 unsigned SourceOrder : 13; 2059 2060 public: 2061 /// \brief Creates a new base-class initializer. 2062 explicit 2063 CXXCtorInitializer(ASTContext &Context, TypeSourceInfo *TInfo, bool IsVirtual, 2064 SourceLocation L, Expr *Init, SourceLocation R, 2065 SourceLocation EllipsisLoc); 2066 2067 /// \brief Creates a new member initializer. 2068 explicit 2069 CXXCtorInitializer(ASTContext &Context, FieldDecl *Member, 2070 SourceLocation MemberLoc, SourceLocation L, Expr *Init, 2071 SourceLocation R); 2072 2073 /// \brief Creates a new anonymous field initializer. 2074 explicit 2075 CXXCtorInitializer(ASTContext &Context, IndirectFieldDecl *Member, 2076 SourceLocation MemberLoc, SourceLocation L, Expr *Init, 2077 SourceLocation R); 2078 2079 /// \brief Creates a new delegating initializer. 2080 explicit 2081 CXXCtorInitializer(ASTContext &Context, TypeSourceInfo *TInfo, 2082 SourceLocation L, Expr *Init, SourceLocation R); 2083 2084 /// \brief Determine whether this initializer is initializing a base class. 2085 bool isBaseInitializer() const { 2086 return Initializee.is<TypeSourceInfo*>() && !IsDelegating; 2087 } 2088 2089 /// \brief Determine whether this initializer is initializing a non-static 2090 /// data member. 2091 bool isMemberInitializer() const { return Initializee.is<FieldDecl*>(); } 2092 2093 bool isAnyMemberInitializer() const { 2094 return isMemberInitializer() || isIndirectMemberInitializer(); 2095 } 2096 2097 bool isIndirectMemberInitializer() const { 2098 return Initializee.is<IndirectFieldDecl*>(); 2099 } 2100 2101 /// \brief Determine whether this initializer is an implicit initializer 2102 /// generated for a field with an initializer defined on the member 2103 /// declaration. 2104 /// 2105 /// In-class member initializers (also known as "non-static data member 2106 /// initializations", NSDMIs) were introduced in C++11. 2107 bool isInClassMemberInitializer() const { 2108 return Init->getStmtClass() == Stmt::CXXDefaultInitExprClass; 2109 } 2110 2111 /// \brief Determine whether this initializer is creating a delegating 2112 /// constructor. 2113 bool isDelegatingInitializer() const { 2114 return Initializee.is<TypeSourceInfo*>() && IsDelegating; 2115 } 2116 2117 /// \brief Determine whether this initializer is a pack expansion. 2118 bool isPackExpansion() const { 2119 return isBaseInitializer() && MemberOrEllipsisLocation.isValid(); 2120 } 2121 2122 // \brief For a pack expansion, returns the location of the ellipsis. 2123 SourceLocation getEllipsisLoc() const { 2124 assert(isPackExpansion() && "Initializer is not a pack expansion"); 2125 return MemberOrEllipsisLocation; 2126 } 2127 2128 /// If this is a base class initializer, returns the type of the 2129 /// base class with location information. Otherwise, returns an NULL 2130 /// type location. 2131 TypeLoc getBaseClassLoc() const; 2132 2133 /// If this is a base class initializer, returns the type of the base class. 2134 /// Otherwise, returns null. 2135 const Type *getBaseClass() const; 2136 2137 /// Returns whether the base is virtual or not. 2138 bool isBaseVirtual() const { 2139 assert(isBaseInitializer() && "Must call this on base initializer!"); 2140 2141 return IsVirtual; 2142 } 2143 2144 /// \brief Returns the declarator information for a base class or delegating 2145 /// initializer. 2146 TypeSourceInfo *getTypeSourceInfo() const { 2147 return Initializee.dyn_cast<TypeSourceInfo *>(); 2148 } 2149 2150 /// \brief If this is a member initializer, returns the declaration of the 2151 /// non-static data member being initialized. Otherwise, returns null. 2152 FieldDecl *getMember() const { 2153 if (isMemberInitializer()) 2154 return Initializee.get<FieldDecl*>(); 2155 return nullptr; 2156 } 2157 FieldDecl *getAnyMember() const { 2158 if (isMemberInitializer()) 2159 return Initializee.get<FieldDecl*>(); 2160 if (isIndirectMemberInitializer()) 2161 return Initializee.get<IndirectFieldDecl*>()->getAnonField(); 2162 return nullptr; 2163 } 2164 2165 IndirectFieldDecl *getIndirectMember() const { 2166 if (isIndirectMemberInitializer()) 2167 return Initializee.get<IndirectFieldDecl*>(); 2168 return nullptr; 2169 } 2170 2171 SourceLocation getMemberLocation() const { 2172 return MemberOrEllipsisLocation; 2173 } 2174 2175 /// \brief Determine the source location of the initializer. 2176 SourceLocation getSourceLocation() const; 2177 2178 /// \brief Determine the source range covering the entire initializer. 2179 SourceRange getSourceRange() const LLVM_READONLY; 2180 2181 /// \brief Determine whether this initializer is explicitly written 2182 /// in the source code. 2183 bool isWritten() const { return IsWritten; } 2184 2185 /// \brief Return the source position of the initializer, counting from 0. 2186 /// If the initializer was implicit, -1 is returned. 2187 int getSourceOrder() const { 2188 return IsWritten ? static_cast<int>(SourceOrder) : -1; 2189 } 2190 2191 /// \brief Set the source order of this initializer. 2192 /// 2193 /// This can only be called once for each initializer; it cannot be called 2194 /// on an initializer having a positive number of (implicit) array indices. 2195 /// 2196 /// This assumes that the initializer was written in the source code, and 2197 /// ensures that isWritten() returns true. 2198 void setSourceOrder(int Pos) { 2199 assert(!IsWritten && 2200 "setSourceOrder() used on implicit initializer"); 2201 assert(SourceOrder == 0 && 2202 "calling twice setSourceOrder() on the same initializer"); 2203 assert(Pos >= 0 && 2204 "setSourceOrder() used to make an initializer implicit"); 2205 IsWritten = true; 2206 SourceOrder = static_cast<unsigned>(Pos); 2207 } 2208 2209 SourceLocation getLParenLoc() const { return LParenLoc; } 2210 SourceLocation getRParenLoc() const { return RParenLoc; } 2211 2212 /// \brief Get the initializer. 2213 Expr *getInit() const { return static_cast<Expr*>(Init); } 2214 }; 2215 2216 /// Description of a constructor that was inherited from a base class. 2217 class InheritedConstructor { 2218 ConstructorUsingShadowDecl *Shadow; 2219 CXXConstructorDecl *BaseCtor; 2220 2221 public: 2222 InheritedConstructor() : Shadow(), BaseCtor() {} 2223 InheritedConstructor(ConstructorUsingShadowDecl *Shadow, 2224 CXXConstructorDecl *BaseCtor) 2225 : Shadow(Shadow), BaseCtor(BaseCtor) {} 2226 2227 explicit operator bool() const { return Shadow; } 2228 2229 ConstructorUsingShadowDecl *getShadowDecl() const { return Shadow; } 2230 CXXConstructorDecl *getConstructor() const { return BaseCtor; } 2231 }; 2232 2233 /// \brief Represents a C++ constructor within a class. 2234 /// 2235 /// For example: 2236 /// 2237 /// \code 2238 /// class X { 2239 /// public: 2240 /// explicit X(int); // represented by a CXXConstructorDecl. 2241 /// }; 2242 /// \endcode 2243 class CXXConstructorDecl final 2244 : public CXXMethodDecl, 2245 private llvm::TrailingObjects<CXXConstructorDecl, InheritedConstructor> { 2246 void anchor() override; 2247 2248 /// \name Support for base and member initializers. 2249 /// \{ 2250 /// \brief The arguments used to initialize the base or member. 2251 LazyCXXCtorInitializersPtr CtorInitializers; 2252 unsigned NumCtorInitializers : 31; 2253 /// \} 2254 2255 /// \brief Whether this constructor declaration is an implicitly-declared 2256 /// inheriting constructor. 2257 unsigned IsInheritingConstructor : 1; 2258 2259 CXXConstructorDecl(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc, 2260 const DeclarationNameInfo &NameInfo, 2261 QualType T, TypeSourceInfo *TInfo, 2262 bool isExplicitSpecified, bool isInline, 2263 bool isImplicitlyDeclared, bool isConstexpr, 2264 InheritedConstructor Inherited) 2265 : CXXMethodDecl(CXXConstructor, C, RD, StartLoc, NameInfo, T, TInfo, 2266 SC_None, isInline, isConstexpr, SourceLocation()), 2267 CtorInitializers(nullptr), NumCtorInitializers(0), 2268 IsInheritingConstructor((bool)Inherited) { 2269 setImplicit(isImplicitlyDeclared); 2270 if (Inherited) 2271 *getTrailingObjects<InheritedConstructor>() = Inherited; 2272 IsExplicitSpecified = isExplicitSpecified; 2273 } 2274 2275 public: 2276 static CXXConstructorDecl *CreateDeserialized(ASTContext &C, unsigned ID, 2277 bool InheritsConstructor); 2278 static CXXConstructorDecl * 2279 Create(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc, 2280 const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo, 2281 bool isExplicit, bool isInline, bool isImplicitlyDeclared, 2282 bool isConstexpr, 2283 InheritedConstructor Inherited = InheritedConstructor()); 2284 2285 /// \brief Iterates through the member/base initializer list. 2286 typedef CXXCtorInitializer **init_iterator; 2287 2288 /// \brief Iterates through the member/base initializer list. 2289 typedef CXXCtorInitializer *const *init_const_iterator; 2290 2291 typedef llvm::iterator_range<init_iterator> init_range; 2292 typedef llvm::iterator_range<init_const_iterator> init_const_range; 2293 2294 init_range inits() { return init_range(init_begin(), init_end()); } 2295 init_const_range inits() const { 2296 return init_const_range(init_begin(), init_end()); 2297 } 2298 2299 /// \brief Retrieve an iterator to the first initializer. 2300 init_iterator init_begin() { 2301 const auto *ConstThis = this; 2302 return const_cast<init_iterator>(ConstThis->init_begin()); 2303 } 2304 /// \brief Retrieve an iterator to the first initializer. 2305 init_const_iterator init_begin() const; 2306 2307 /// \brief Retrieve an iterator past the last initializer. 2308 init_iterator init_end() { 2309 return init_begin() + NumCtorInitializers; 2310 } 2311 /// \brief Retrieve an iterator past the last initializer. 2312 init_const_iterator init_end() const { 2313 return init_begin() + NumCtorInitializers; 2314 } 2315 2316 typedef std::reverse_iterator<init_iterator> init_reverse_iterator; 2317 typedef std::reverse_iterator<init_const_iterator> 2318 init_const_reverse_iterator; 2319 2320 init_reverse_iterator init_rbegin() { 2321 return init_reverse_iterator(init_end()); 2322 } 2323 init_const_reverse_iterator init_rbegin() const { 2324 return init_const_reverse_iterator(init_end()); 2325 } 2326 2327 init_reverse_iterator init_rend() { 2328 return init_reverse_iterator(init_begin()); 2329 } 2330 init_const_reverse_iterator init_rend() const { 2331 return init_const_reverse_iterator(init_begin()); 2332 } 2333 2334 /// \brief Determine the number of arguments used to initialize the member 2335 /// or base. 2336 unsigned getNumCtorInitializers() const { 2337 return NumCtorInitializers; 2338 } 2339 2340 void setNumCtorInitializers(unsigned numCtorInitializers) { 2341 NumCtorInitializers = numCtorInitializers; 2342 } 2343 2344 void setCtorInitializers(CXXCtorInitializer **Initializers) { 2345 CtorInitializers = Initializers; 2346 } 2347 2348 /// Whether this function is marked as explicit explicitly. 2349 bool isExplicitSpecified() const { return IsExplicitSpecified; } 2350 2351 /// Whether this function is explicit. 2352 bool isExplicit() const { 2353 return getCanonicalDecl()->isExplicitSpecified(); 2354 } 2355 2356 /// \brief Determine whether this constructor is a delegating constructor. 2357 bool isDelegatingConstructor() const { 2358 return (getNumCtorInitializers() == 1) && 2359 init_begin()[0]->isDelegatingInitializer(); 2360 } 2361 2362 /// \brief When this constructor delegates to another, retrieve the target. 2363 CXXConstructorDecl *getTargetConstructor() const; 2364 2365 /// Whether this constructor is a default 2366 /// constructor (C++ [class.ctor]p5), which can be used to 2367 /// default-initialize a class of this type. 2368 bool isDefaultConstructor() const; 2369 2370 /// \brief Whether this constructor is a copy constructor (C++ [class.copy]p2, 2371 /// which can be used to copy the class. 2372 /// 2373 /// \p TypeQuals will be set to the qualifiers on the 2374 /// argument type. For example, \p TypeQuals would be set to \c 2375 /// Qualifiers::Const for the following copy constructor: 2376 /// 2377 /// \code 2378 /// class X { 2379 /// public: 2380 /// X(const X&); 2381 /// }; 2382 /// \endcode 2383 bool isCopyConstructor(unsigned &TypeQuals) const; 2384 2385 /// Whether this constructor is a copy 2386 /// constructor (C++ [class.copy]p2, which can be used to copy the 2387 /// class. 2388 bool isCopyConstructor() const { 2389 unsigned TypeQuals = 0; 2390 return isCopyConstructor(TypeQuals); 2391 } 2392 2393 /// \brief Determine whether this constructor is a move constructor 2394 /// (C++11 [class.copy]p3), which can be used to move values of the class. 2395 /// 2396 /// \param TypeQuals If this constructor is a move constructor, will be set 2397 /// to the type qualifiers on the referent of the first parameter's type. 2398 bool isMoveConstructor(unsigned &TypeQuals) const; 2399 2400 /// \brief Determine whether this constructor is a move constructor 2401 /// (C++11 [class.copy]p3), which can be used to move values of the class. 2402 bool isMoveConstructor() const { 2403 unsigned TypeQuals = 0; 2404 return isMoveConstructor(TypeQuals); 2405 } 2406 2407 /// \brief Determine whether this is a copy or move constructor. 2408 /// 2409 /// \param TypeQuals Will be set to the type qualifiers on the reference 2410 /// parameter, if in fact this is a copy or move constructor. 2411 bool isCopyOrMoveConstructor(unsigned &TypeQuals) const; 2412 2413 /// \brief Determine whether this a copy or move constructor. 2414 bool isCopyOrMoveConstructor() const { 2415 unsigned Quals; 2416 return isCopyOrMoveConstructor(Quals); 2417 } 2418 2419 /// Whether this constructor is a 2420 /// converting constructor (C++ [class.conv.ctor]), which can be 2421 /// used for user-defined conversions. 2422 bool isConvertingConstructor(bool AllowExplicit) const; 2423 2424 /// \brief Determine whether this is a member template specialization that 2425 /// would copy the object to itself. Such constructors are never used to copy 2426 /// an object. 2427 bool isSpecializationCopyingObject() const; 2428 2429 /// \brief Determine whether this is an implicit constructor synthesized to 2430 /// model a call to a constructor inherited from a base class. 2431 bool isInheritingConstructor() const { return IsInheritingConstructor; } 2432 2433 /// \brief Get the constructor that this inheriting constructor is based on. 2434 InheritedConstructor getInheritedConstructor() const { 2435 return IsInheritingConstructor ? *getTrailingObjects<InheritedConstructor>() 2436 : InheritedConstructor(); 2437 } 2438 2439 CXXConstructorDecl *getCanonicalDecl() override { 2440 return cast<CXXConstructorDecl>(FunctionDecl::getCanonicalDecl()); 2441 } 2442 const CXXConstructorDecl *getCanonicalDecl() const { 2443 return const_cast<CXXConstructorDecl*>(this)->getCanonicalDecl(); 2444 } 2445 2446 // Implement isa/cast/dyncast/etc. 2447 static bool classof(const Decl *D) { return classofKind(D->getKind()); } 2448 static bool classofKind(Kind K) { return K == CXXConstructor; } 2449 2450 friend class ASTDeclReader; 2451 friend class ASTDeclWriter; 2452 friend TrailingObjects; 2453 }; 2454 2455 /// \brief Represents a C++ destructor within a class. 2456 /// 2457 /// For example: 2458 /// 2459 /// \code 2460 /// class X { 2461 /// public: 2462 /// ~X(); // represented by a CXXDestructorDecl. 2463 /// }; 2464 /// \endcode 2465 class CXXDestructorDecl : public CXXMethodDecl { 2466 void anchor() override; 2467 2468 FunctionDecl *OperatorDelete; 2469 2470 CXXDestructorDecl(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc, 2471 const DeclarationNameInfo &NameInfo, 2472 QualType T, TypeSourceInfo *TInfo, 2473 bool isInline, bool isImplicitlyDeclared) 2474 : CXXMethodDecl(CXXDestructor, C, RD, StartLoc, NameInfo, T, TInfo, 2475 SC_None, isInline, /*isConstexpr=*/false, SourceLocation()), 2476 OperatorDelete(nullptr) { 2477 setImplicit(isImplicitlyDeclared); 2478 } 2479 2480 public: 2481 static CXXDestructorDecl *Create(ASTContext &C, CXXRecordDecl *RD, 2482 SourceLocation StartLoc, 2483 const DeclarationNameInfo &NameInfo, 2484 QualType T, TypeSourceInfo* TInfo, 2485 bool isInline, 2486 bool isImplicitlyDeclared); 2487 static CXXDestructorDecl *CreateDeserialized(ASTContext & C, unsigned ID); 2488 2489 void setOperatorDelete(FunctionDecl *OD); 2490 const FunctionDecl *getOperatorDelete() const { 2491 return getCanonicalDecl()->OperatorDelete; 2492 } 2493 2494 CXXDestructorDecl *getCanonicalDecl() override { 2495 return cast<CXXDestructorDecl>(FunctionDecl::getCanonicalDecl()); 2496 } 2497 const CXXDestructorDecl *getCanonicalDecl() const { 2498 return const_cast<CXXDestructorDecl*>(this)->getCanonicalDecl(); 2499 } 2500 2501 // Implement isa/cast/dyncast/etc. 2502 static bool classof(const Decl *D) { return classofKind(D->getKind()); } 2503 static bool classofKind(Kind K) { return K == CXXDestructor; } 2504 2505 friend class ASTDeclReader; 2506 friend class ASTDeclWriter; 2507 }; 2508 2509 /// \brief Represents a C++ conversion function within a class. 2510 /// 2511 /// For example: 2512 /// 2513 /// \code 2514 /// class X { 2515 /// public: 2516 /// operator bool(); 2517 /// }; 2518 /// \endcode 2519 class CXXConversionDecl : public CXXMethodDecl { 2520 void anchor() override; 2521 2522 CXXConversionDecl(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc, 2523 const DeclarationNameInfo &NameInfo, QualType T, 2524 TypeSourceInfo *TInfo, bool isInline, 2525 bool isExplicitSpecified, bool isConstexpr, 2526 SourceLocation EndLocation) 2527 : CXXMethodDecl(CXXConversion, C, RD, StartLoc, NameInfo, T, TInfo, 2528 SC_None, isInline, isConstexpr, EndLocation) { 2529 IsExplicitSpecified = isExplicitSpecified; 2530 } 2531 2532 public: 2533 static CXXConversionDecl *Create(ASTContext &C, CXXRecordDecl *RD, 2534 SourceLocation StartLoc, 2535 const DeclarationNameInfo &NameInfo, 2536 QualType T, TypeSourceInfo *TInfo, 2537 bool isInline, bool isExplicit, 2538 bool isConstexpr, 2539 SourceLocation EndLocation); 2540 static CXXConversionDecl *CreateDeserialized(ASTContext &C, unsigned ID); 2541 2542 /// Whether this function is marked as explicit explicitly. 2543 bool isExplicitSpecified() const { return IsExplicitSpecified; } 2544 2545 /// Whether this function is explicit. 2546 bool isExplicit() const { 2547 return getCanonicalDecl()->isExplicitSpecified(); 2548 } 2549 2550 /// \brief Returns the type that this conversion function is converting to. 2551 QualType getConversionType() const { 2552 return getType()->getAs<FunctionType>()->getReturnType(); 2553 } 2554 2555 /// \brief Determine whether this conversion function is a conversion from 2556 /// a lambda closure type to a block pointer. 2557 bool isLambdaToBlockPointerConversion() const; 2558 2559 CXXConversionDecl *getCanonicalDecl() override { 2560 return cast<CXXConversionDecl>(FunctionDecl::getCanonicalDecl()); 2561 } 2562 const CXXConversionDecl *getCanonicalDecl() const { 2563 return const_cast<CXXConversionDecl*>(this)->getCanonicalDecl(); 2564 } 2565 2566 // Implement isa/cast/dyncast/etc. 2567 static bool classof(const Decl *D) { return classofKind(D->getKind()); } 2568 static bool classofKind(Kind K) { return K == CXXConversion; } 2569 2570 friend class ASTDeclReader; 2571 friend class ASTDeclWriter; 2572 }; 2573 2574 /// \brief Represents a linkage specification. 2575 /// 2576 /// For example: 2577 /// \code 2578 /// extern "C" void foo(); 2579 /// \endcode 2580 class LinkageSpecDecl : public Decl, public DeclContext { 2581 virtual void anchor(); 2582 public: 2583 /// \brief Represents the language in a linkage specification. 2584 /// 2585 /// The values are part of the serialization ABI for 2586 /// ASTs and cannot be changed without altering that ABI. To help 2587 /// ensure a stable ABI for this, we choose the DW_LANG_ encodings 2588 /// from the dwarf standard. 2589 enum LanguageIDs { 2590 lang_c = /* DW_LANG_C */ 0x0002, 2591 lang_cxx = /* DW_LANG_C_plus_plus */ 0x0004 2592 }; 2593 private: 2594 /// \brief The language for this linkage specification. 2595 unsigned Language : 3; 2596 /// \brief True if this linkage spec has braces. 2597 /// 2598 /// This is needed so that hasBraces() returns the correct result while the 2599 /// linkage spec body is being parsed. Once RBraceLoc has been set this is 2600 /// not used, so it doesn't need to be serialized. 2601 unsigned HasBraces : 1; 2602 /// \brief The source location for the extern keyword. 2603 SourceLocation ExternLoc; 2604 /// \brief The source location for the right brace (if valid). 2605 SourceLocation RBraceLoc; 2606 2607 LinkageSpecDecl(DeclContext *DC, SourceLocation ExternLoc, 2608 SourceLocation LangLoc, LanguageIDs lang, bool HasBraces) 2609 : Decl(LinkageSpec, DC, LangLoc), DeclContext(LinkageSpec), 2610 Language(lang), HasBraces(HasBraces), ExternLoc(ExternLoc), 2611 RBraceLoc(SourceLocation()) { } 2612 2613 public: 2614 static LinkageSpecDecl *Create(ASTContext &C, DeclContext *DC, 2615 SourceLocation ExternLoc, 2616 SourceLocation LangLoc, LanguageIDs Lang, 2617 bool HasBraces); 2618 static LinkageSpecDecl *CreateDeserialized(ASTContext &C, unsigned ID); 2619 2620 /// \brief Return the language specified by this linkage specification. 2621 LanguageIDs getLanguage() const { return LanguageIDs(Language); } 2622 /// \brief Set the language specified by this linkage specification. 2623 void setLanguage(LanguageIDs L) { Language = L; } 2624 2625 /// \brief Determines whether this linkage specification had braces in 2626 /// its syntactic form. 2627 bool hasBraces() const { 2628 assert(!RBraceLoc.isValid() || HasBraces); 2629 return HasBraces; 2630 } 2631 2632 SourceLocation getExternLoc() const { return ExternLoc; } 2633 SourceLocation getRBraceLoc() const { return RBraceLoc; } 2634 void setExternLoc(SourceLocation L) { ExternLoc = L; } 2635 void setRBraceLoc(SourceLocation L) { 2636 RBraceLoc = L; 2637 HasBraces = RBraceLoc.isValid(); 2638 } 2639 2640 SourceLocation getLocEnd() const LLVM_READONLY { 2641 if (hasBraces()) 2642 return getRBraceLoc(); 2643 // No braces: get the end location of the (only) declaration in context 2644 // (if present). 2645 return decls_empty() ? getLocation() : decls_begin()->getLocEnd(); 2646 } 2647 2648 SourceRange getSourceRange() const override LLVM_READONLY { 2649 return SourceRange(ExternLoc, getLocEnd()); 2650 } 2651 2652 static bool classof(const Decl *D) { return classofKind(D->getKind()); } 2653 static bool classofKind(Kind K) { return K == LinkageSpec; } 2654 static DeclContext *castToDeclContext(const LinkageSpecDecl *D) { 2655 return static_cast<DeclContext *>(const_cast<LinkageSpecDecl*>(D)); 2656 } 2657 static LinkageSpecDecl *castFromDeclContext(const DeclContext *DC) { 2658 return static_cast<LinkageSpecDecl *>(const_cast<DeclContext*>(DC)); 2659 } 2660 }; 2661 2662 /// \brief Represents C++ using-directive. 2663 /// 2664 /// For example: 2665 /// \code 2666 /// using namespace std; 2667 /// \endcode 2668 /// 2669 /// \note UsingDirectiveDecl should be Decl not NamedDecl, but we provide 2670 /// artificial names for all using-directives in order to store 2671 /// them in DeclContext effectively. 2672 class UsingDirectiveDecl : public NamedDecl { 2673 void anchor() override; 2674 /// \brief The location of the \c using keyword. 2675 SourceLocation UsingLoc; 2676 2677 /// \brief The location of the \c namespace keyword. 2678 SourceLocation NamespaceLoc; 2679 2680 /// \brief The nested-name-specifier that precedes the namespace. 2681 NestedNameSpecifierLoc QualifierLoc; 2682 2683 /// \brief The namespace nominated by this using-directive. 2684 NamedDecl *NominatedNamespace; 2685 2686 /// Enclosing context containing both using-directive and nominated 2687 /// namespace. 2688 DeclContext *CommonAncestor; 2689 2690 /// \brief Returns special DeclarationName used by using-directives. 2691 /// 2692 /// This is only used by DeclContext for storing UsingDirectiveDecls in 2693 /// its lookup structure. 2694 static DeclarationName getName() { 2695 return DeclarationName::getUsingDirectiveName(); 2696 } 2697 2698 UsingDirectiveDecl(DeclContext *DC, SourceLocation UsingLoc, 2699 SourceLocation NamespcLoc, 2700 NestedNameSpecifierLoc QualifierLoc, 2701 SourceLocation IdentLoc, 2702 NamedDecl *Nominated, 2703 DeclContext *CommonAncestor) 2704 : NamedDecl(UsingDirective, DC, IdentLoc, getName()), UsingLoc(UsingLoc), 2705 NamespaceLoc(NamespcLoc), QualifierLoc(QualifierLoc), 2706 NominatedNamespace(Nominated), CommonAncestor(CommonAncestor) { } 2707 2708 public: 2709 /// \brief Retrieve the nested-name-specifier that qualifies the 2710 /// name of the namespace, with source-location information. 2711 NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; } 2712 2713 /// \brief Retrieve the nested-name-specifier that qualifies the 2714 /// name of the namespace. 2715 NestedNameSpecifier *getQualifier() const { 2716 return QualifierLoc.getNestedNameSpecifier(); 2717 } 2718 2719 NamedDecl *getNominatedNamespaceAsWritten() { return NominatedNamespace; } 2720 const NamedDecl *getNominatedNamespaceAsWritten() const { 2721 return NominatedNamespace; 2722 } 2723 2724 /// \brief Returns the namespace nominated by this using-directive. 2725 NamespaceDecl *getNominatedNamespace(); 2726 2727 const NamespaceDecl *getNominatedNamespace() const { 2728 return const_cast<UsingDirectiveDecl*>(this)->getNominatedNamespace(); 2729 } 2730 2731 /// \brief Returns the common ancestor context of this using-directive and 2732 /// its nominated namespace. 2733 DeclContext *getCommonAncestor() { return CommonAncestor; } 2734 const DeclContext *getCommonAncestor() const { return CommonAncestor; } 2735 2736 /// \brief Return the location of the \c using keyword. 2737 SourceLocation getUsingLoc() const { return UsingLoc; } 2738 2739 // FIXME: Could omit 'Key' in name. 2740 /// \brief Returns the location of the \c namespace keyword. 2741 SourceLocation getNamespaceKeyLocation() const { return NamespaceLoc; } 2742 2743 /// \brief Returns the location of this using declaration's identifier. 2744 SourceLocation getIdentLocation() const { return getLocation(); } 2745 2746 static UsingDirectiveDecl *Create(ASTContext &C, DeclContext *DC, 2747 SourceLocation UsingLoc, 2748 SourceLocation NamespaceLoc, 2749 NestedNameSpecifierLoc QualifierLoc, 2750 SourceLocation IdentLoc, 2751 NamedDecl *Nominated, 2752 DeclContext *CommonAncestor); 2753 static UsingDirectiveDecl *CreateDeserialized(ASTContext &C, unsigned ID); 2754 2755 SourceRange getSourceRange() const override LLVM_READONLY { 2756 return SourceRange(UsingLoc, getLocation()); 2757 } 2758 2759 static bool classof(const Decl *D) { return classofKind(D->getKind()); } 2760 static bool classofKind(Kind K) { return K == UsingDirective; } 2761 2762 // Friend for getUsingDirectiveName. 2763 friend class DeclContext; 2764 2765 friend class ASTDeclReader; 2766 }; 2767 2768 /// \brief Represents a C++ namespace alias. 2769 /// 2770 /// For example: 2771 /// 2772 /// \code 2773 /// namespace Foo = Bar; 2774 /// \endcode 2775 class NamespaceAliasDecl : public NamedDecl, 2776 public Redeclarable<NamespaceAliasDecl> { 2777 void anchor() override; 2778 2779 /// \brief The location of the \c namespace keyword. 2780 SourceLocation NamespaceLoc; 2781 2782 /// \brief The location of the namespace's identifier. 2783 /// 2784 /// This is accessed by TargetNameLoc. 2785 SourceLocation IdentLoc; 2786 2787 /// \brief The nested-name-specifier that precedes the namespace. 2788 NestedNameSpecifierLoc QualifierLoc; 2789 2790 /// \brief The Decl that this alias points to, either a NamespaceDecl or 2791 /// a NamespaceAliasDecl. 2792 NamedDecl *Namespace; 2793 2794 NamespaceAliasDecl(ASTContext &C, DeclContext *DC, 2795 SourceLocation NamespaceLoc, SourceLocation AliasLoc, 2796 IdentifierInfo *Alias, NestedNameSpecifierLoc QualifierLoc, 2797 SourceLocation IdentLoc, NamedDecl *Namespace) 2798 : NamedDecl(NamespaceAlias, DC, AliasLoc, Alias), redeclarable_base(C), 2799 NamespaceLoc(NamespaceLoc), IdentLoc(IdentLoc), 2800 QualifierLoc(QualifierLoc), Namespace(Namespace) {} 2801 2802 typedef Redeclarable<NamespaceAliasDecl> redeclarable_base; 2803 NamespaceAliasDecl *getNextRedeclarationImpl() override; 2804 NamespaceAliasDecl *getPreviousDeclImpl() override; 2805 NamespaceAliasDecl *getMostRecentDeclImpl() override; 2806 2807 friend class ASTDeclReader; 2808 2809 public: 2810 static NamespaceAliasDecl *Create(ASTContext &C, DeclContext *DC, 2811 SourceLocation NamespaceLoc, 2812 SourceLocation AliasLoc, 2813 IdentifierInfo *Alias, 2814 NestedNameSpecifierLoc QualifierLoc, 2815 SourceLocation IdentLoc, 2816 NamedDecl *Namespace); 2817 2818 static NamespaceAliasDecl *CreateDeserialized(ASTContext &C, unsigned ID); 2819 2820 typedef redeclarable_base::redecl_range redecl_range; 2821 typedef redeclarable_base::redecl_iterator redecl_iterator; 2822 using redeclarable_base::redecls_begin; 2823 using redeclarable_base::redecls_end; 2824 using redeclarable_base::redecls; 2825 using redeclarable_base::getPreviousDecl; 2826 using redeclarable_base::getMostRecentDecl; 2827 2828 NamespaceAliasDecl *getCanonicalDecl() override { 2829 return getFirstDecl(); 2830 } 2831 const NamespaceAliasDecl *getCanonicalDecl() const { 2832 return getFirstDecl(); 2833 } 2834 2835 /// \brief Retrieve the nested-name-specifier that qualifies the 2836 /// name of the namespace, with source-location information. 2837 NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; } 2838 2839 /// \brief Retrieve the nested-name-specifier that qualifies the 2840 /// name of the namespace. 2841 NestedNameSpecifier *getQualifier() const { 2842 return QualifierLoc.getNestedNameSpecifier(); 2843 } 2844 2845 /// \brief Retrieve the namespace declaration aliased by this directive. 2846 NamespaceDecl *getNamespace() { 2847 if (NamespaceAliasDecl *AD = dyn_cast<NamespaceAliasDecl>(Namespace)) 2848 return AD->getNamespace(); 2849 2850 return cast<NamespaceDecl>(Namespace); 2851 } 2852 2853 const NamespaceDecl *getNamespace() const { 2854 return const_cast<NamespaceAliasDecl*>(this)->getNamespace(); 2855 } 2856 2857 /// Returns the location of the alias name, i.e. 'foo' in 2858 /// "namespace foo = ns::bar;". 2859 SourceLocation getAliasLoc() const { return getLocation(); } 2860 2861 /// Returns the location of the \c namespace keyword. 2862 SourceLocation getNamespaceLoc() const { return NamespaceLoc; } 2863 2864 /// Returns the location of the identifier in the named namespace. 2865 SourceLocation getTargetNameLoc() const { return IdentLoc; } 2866 2867 /// \brief Retrieve the namespace that this alias refers to, which 2868 /// may either be a NamespaceDecl or a NamespaceAliasDecl. 2869 NamedDecl *getAliasedNamespace() const { return Namespace; } 2870 2871 SourceRange getSourceRange() const override LLVM_READONLY { 2872 return SourceRange(NamespaceLoc, IdentLoc); 2873 } 2874 2875 static bool classof(const Decl *D) { return classofKind(D->getKind()); } 2876 static bool classofKind(Kind K) { return K == NamespaceAlias; } 2877 }; 2878 2879 /// \brief Represents a shadow declaration introduced into a scope by a 2880 /// (resolved) using declaration. 2881 /// 2882 /// For example, 2883 /// \code 2884 /// namespace A { 2885 /// void foo(); 2886 /// } 2887 /// namespace B { 2888 /// using A::foo; // <- a UsingDecl 2889 /// // Also creates a UsingShadowDecl for A::foo() in B 2890 /// } 2891 /// \endcode 2892 class UsingShadowDecl : public NamedDecl, public Redeclarable<UsingShadowDecl> { 2893 void anchor() override; 2894 2895 /// The referenced declaration. 2896 NamedDecl *Underlying; 2897 2898 /// \brief The using declaration which introduced this decl or the next using 2899 /// shadow declaration contained in the aforementioned using declaration. 2900 NamedDecl *UsingOrNextShadow; 2901 friend class UsingDecl; 2902 2903 typedef Redeclarable<UsingShadowDecl> redeclarable_base; 2904 UsingShadowDecl *getNextRedeclarationImpl() override { 2905 return getNextRedeclaration(); 2906 } 2907 UsingShadowDecl *getPreviousDeclImpl() override { 2908 return getPreviousDecl(); 2909 } 2910 UsingShadowDecl *getMostRecentDeclImpl() override { 2911 return getMostRecentDecl(); 2912 } 2913 2914 protected: 2915 UsingShadowDecl(Kind K, ASTContext &C, DeclContext *DC, SourceLocation Loc, 2916 UsingDecl *Using, NamedDecl *Target); 2917 UsingShadowDecl(Kind K, ASTContext &C, EmptyShell); 2918 2919 public: 2920 static UsingShadowDecl *Create(ASTContext &C, DeclContext *DC, 2921 SourceLocation Loc, UsingDecl *Using, 2922 NamedDecl *Target) { 2923 return new (C, DC) UsingShadowDecl(UsingShadow, C, DC, Loc, Using, Target); 2924 } 2925 2926 static UsingShadowDecl *CreateDeserialized(ASTContext &C, unsigned ID); 2927 2928 typedef redeclarable_base::redecl_range redecl_range; 2929 typedef redeclarable_base::redecl_iterator redecl_iterator; 2930 using redeclarable_base::redecls_begin; 2931 using redeclarable_base::redecls_end; 2932 using redeclarable_base::redecls; 2933 using redeclarable_base::getPreviousDecl; 2934 using redeclarable_base::getMostRecentDecl; 2935 using redeclarable_base::isFirstDecl; 2936 2937 UsingShadowDecl *getCanonicalDecl() override { 2938 return getFirstDecl(); 2939 } 2940 const UsingShadowDecl *getCanonicalDecl() const { 2941 return getFirstDecl(); 2942 } 2943 2944 /// \brief Gets the underlying declaration which has been brought into the 2945 /// local scope. 2946 NamedDecl *getTargetDecl() const { return Underlying; } 2947 2948 /// \brief Sets the underlying declaration which has been brought into the 2949 /// local scope. 2950 void setTargetDecl(NamedDecl* ND) { 2951 assert(ND && "Target decl is null!"); 2952 Underlying = ND; 2953 IdentifierNamespace = ND->getIdentifierNamespace(); 2954 } 2955 2956 /// \brief Gets the using declaration to which this declaration is tied. 2957 UsingDecl *getUsingDecl() const; 2958 2959 /// \brief The next using shadow declaration contained in the shadow decl 2960 /// chain of the using declaration which introduced this decl. 2961 UsingShadowDecl *getNextUsingShadowDecl() const { 2962 return dyn_cast_or_null<UsingShadowDecl>(UsingOrNextShadow); 2963 } 2964 2965 static bool classof(const Decl *D) { return classofKind(D->getKind()); } 2966 static bool classofKind(Kind K) { 2967 return K == Decl::UsingShadow || K == Decl::ConstructorUsingShadow; 2968 } 2969 2970 friend class ASTDeclReader; 2971 friend class ASTDeclWriter; 2972 }; 2973 2974 /// \brief Represents a shadow constructor declaration introduced into a 2975 /// class by a C++11 using-declaration that names a constructor. 2976 /// 2977 /// For example: 2978 /// \code 2979 /// struct Base { Base(int); }; 2980 /// struct Derived { 2981 /// using Base::Base; // creates a UsingDecl and a ConstructorUsingShadowDecl 2982 /// }; 2983 /// \endcode 2984 class ConstructorUsingShadowDecl final : public UsingShadowDecl { 2985 void anchor() override; 2986 2987 /// \brief If this constructor using declaration inherted the constructor 2988 /// from an indirect base class, this is the ConstructorUsingShadowDecl 2989 /// in the named direct base class from which the declaration was inherited. 2990 ConstructorUsingShadowDecl *NominatedBaseClassShadowDecl; 2991 2992 /// \brief If this constructor using declaration inherted the constructor 2993 /// from an indirect base class, this is the ConstructorUsingShadowDecl 2994 /// that will be used to construct the unique direct or virtual base class 2995 /// that receives the constructor arguments. 2996 ConstructorUsingShadowDecl *ConstructedBaseClassShadowDecl; 2997 2998 /// \brief \c true if the constructor ultimately named by this using shadow 2999 /// declaration is within a virtual base class subobject of the class that 3000 /// contains this declaration. 3001 unsigned IsVirtual : 1; 3002 3003 ConstructorUsingShadowDecl(ASTContext &C, DeclContext *DC, SourceLocation Loc, 3004 UsingDecl *Using, NamedDecl *Target, 3005 bool TargetInVirtualBase) 3006 : UsingShadowDecl(ConstructorUsingShadow, C, DC, Loc, Using, 3007 Target->getUnderlyingDecl()), 3008 NominatedBaseClassShadowDecl( 3009 dyn_cast<ConstructorUsingShadowDecl>(Target)), 3010 ConstructedBaseClassShadowDecl(NominatedBaseClassShadowDecl), 3011 IsVirtual(TargetInVirtualBase) { 3012 // If we found a constructor that chains to a constructor for a virtual 3013 // base, we should directly call that virtual base constructor instead. 3014 // FIXME: This logic belongs in Sema. 3015 if (NominatedBaseClassShadowDecl && 3016 NominatedBaseClassShadowDecl->constructsVirtualBase()) { 3017 ConstructedBaseClassShadowDecl = 3018 NominatedBaseClassShadowDecl->ConstructedBaseClassShadowDecl; 3019 IsVirtual = true; 3020 } 3021 } 3022 ConstructorUsingShadowDecl(ASTContext &C, EmptyShell Empty) 3023 : UsingShadowDecl(ConstructorUsingShadow, C, Empty), 3024 NominatedBaseClassShadowDecl(), ConstructedBaseClassShadowDecl(), 3025 IsVirtual(false) {} 3026 3027 public: 3028 static ConstructorUsingShadowDecl *Create(ASTContext &C, DeclContext *DC, 3029 SourceLocation Loc, 3030 UsingDecl *Using, NamedDecl *Target, 3031 bool IsVirtual); 3032 static ConstructorUsingShadowDecl *CreateDeserialized(ASTContext &C, 3033 unsigned ID); 3034 3035 /// Returns the parent of this using shadow declaration, which 3036 /// is the class in which this is declared. 3037 //@{ 3038 const CXXRecordDecl *getParent() const { 3039 return cast<CXXRecordDecl>(getDeclContext()); 3040 } 3041 CXXRecordDecl *getParent() { 3042 return cast<CXXRecordDecl>(getDeclContext()); 3043 } 3044 //@} 3045 3046 /// \brief Get the inheriting constructor declaration for the direct base 3047 /// class from which this using shadow declaration was inherited, if there is 3048 /// one. This can be different for each redeclaration of the same shadow decl. 3049 ConstructorUsingShadowDecl *getNominatedBaseClassShadowDecl() const { 3050 return NominatedBaseClassShadowDecl; 3051 } 3052 3053 /// \brief Get the inheriting constructor declaration for the base class 3054 /// for which we don't have an explicit initializer, if there is one. 3055 ConstructorUsingShadowDecl *getConstructedBaseClassShadowDecl() const { 3056 return ConstructedBaseClassShadowDecl; 3057 } 3058 3059 /// \brief Get the base class that was named in the using declaration. This 3060 /// can be different for each redeclaration of this same shadow decl. 3061 CXXRecordDecl *getNominatedBaseClass() const; 3062 3063 /// \brief Get the base class whose constructor or constructor shadow 3064 /// declaration is passed the constructor arguments. 3065 CXXRecordDecl *getConstructedBaseClass() const { 3066 return cast<CXXRecordDecl>((ConstructedBaseClassShadowDecl 3067 ? ConstructedBaseClassShadowDecl 3068 : getTargetDecl()) 3069 ->getDeclContext()); 3070 } 3071 3072 /// \brief Returns \c true if the constructed base class is a virtual base 3073 /// class subobject of this declaration's class. 3074 bool constructsVirtualBase() const { 3075 return IsVirtual; 3076 } 3077 3078 /// \brief Get the constructor or constructor template in the derived class 3079 /// correspnding to this using shadow declaration, if it has been implicitly 3080 /// declared already. 3081 CXXConstructorDecl *getConstructor() const; 3082 void setConstructor(NamedDecl *Ctor); 3083 3084 static bool classof(const Decl *D) { return classofKind(D->getKind()); } 3085 static bool classofKind(Kind K) { return K == ConstructorUsingShadow; } 3086 3087 friend class ASTDeclReader; 3088 friend class ASTDeclWriter; 3089 }; 3090 3091 /// \brief Represents a C++ using-declaration. 3092 /// 3093 /// For example: 3094 /// \code 3095 /// using someNameSpace::someIdentifier; 3096 /// \endcode 3097 class UsingDecl : public NamedDecl, public Mergeable<UsingDecl> { 3098 void anchor() override; 3099 3100 /// \brief The source location of the 'using' keyword itself. 3101 SourceLocation UsingLocation; 3102 3103 /// \brief The nested-name-specifier that precedes the name. 3104 NestedNameSpecifierLoc QualifierLoc; 3105 3106 /// \brief Provides source/type location info for the declaration name 3107 /// embedded in the ValueDecl base class. 3108 DeclarationNameLoc DNLoc; 3109 3110 /// \brief The first shadow declaration of the shadow decl chain associated 3111 /// with this using declaration. 3112 /// 3113 /// The bool member of the pair store whether this decl has the \c typename 3114 /// keyword. 3115 llvm::PointerIntPair<UsingShadowDecl *, 1, bool> FirstUsingShadow; 3116 3117 UsingDecl(DeclContext *DC, SourceLocation UL, 3118 NestedNameSpecifierLoc QualifierLoc, 3119 const DeclarationNameInfo &NameInfo, bool HasTypenameKeyword) 3120 : NamedDecl(Using, DC, NameInfo.getLoc(), NameInfo.getName()), 3121 UsingLocation(UL), QualifierLoc(QualifierLoc), 3122 DNLoc(NameInfo.getInfo()), FirstUsingShadow(nullptr, HasTypenameKeyword) { 3123 } 3124 3125 public: 3126 /// \brief Return the source location of the 'using' keyword. 3127 SourceLocation getUsingLoc() const { return UsingLocation; } 3128 3129 /// \brief Set the source location of the 'using' keyword. 3130 void setUsingLoc(SourceLocation L) { UsingLocation = L; } 3131 3132 /// \brief Retrieve the nested-name-specifier that qualifies the name, 3133 /// with source-location information. 3134 NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; } 3135 3136 /// \brief Retrieve the nested-name-specifier that qualifies the name. 3137 NestedNameSpecifier *getQualifier() const { 3138 return QualifierLoc.getNestedNameSpecifier(); 3139 } 3140 3141 DeclarationNameInfo getNameInfo() const { 3142 return DeclarationNameInfo(getDeclName(), getLocation(), DNLoc); 3143 } 3144 3145 /// \brief Return true if it is a C++03 access declaration (no 'using'). 3146 bool isAccessDeclaration() const { return UsingLocation.isInvalid(); } 3147 3148 /// \brief Return true if the using declaration has 'typename'. 3149 bool hasTypename() const { return FirstUsingShadow.getInt(); } 3150 3151 /// \brief Sets whether the using declaration has 'typename'. 3152 void setTypename(bool TN) { FirstUsingShadow.setInt(TN); } 3153 3154 /// \brief Iterates through the using shadow declarations associated with 3155 /// this using declaration. 3156 class shadow_iterator { 3157 /// \brief The current using shadow declaration. 3158 UsingShadowDecl *Current; 3159 3160 public: 3161 typedef UsingShadowDecl* value_type; 3162 typedef UsingShadowDecl* reference; 3163 typedef UsingShadowDecl* pointer; 3164 typedef std::forward_iterator_tag iterator_category; 3165 typedef std::ptrdiff_t difference_type; 3166 3167 shadow_iterator() : Current(nullptr) { } 3168 explicit shadow_iterator(UsingShadowDecl *C) : Current(C) { } 3169 3170 reference operator*() const { return Current; } 3171 pointer operator->() const { return Current; } 3172 3173 shadow_iterator& operator++() { 3174 Current = Current->getNextUsingShadowDecl(); 3175 return *this; 3176 } 3177 3178 shadow_iterator operator++(int) { 3179 shadow_iterator tmp(*this); 3180 ++(*this); 3181 return tmp; 3182 } 3183 3184 friend bool operator==(shadow_iterator x, shadow_iterator y) { 3185 return x.Current == y.Current; 3186 } 3187 friend bool operator!=(shadow_iterator x, shadow_iterator y) { 3188 return x.Current != y.Current; 3189 } 3190 }; 3191 3192 typedef llvm::iterator_range<shadow_iterator> shadow_range; 3193 3194 shadow_range shadows() const { 3195 return shadow_range(shadow_begin(), shadow_end()); 3196 } 3197 shadow_iterator shadow_begin() const { 3198 return shadow_iterator(FirstUsingShadow.getPointer()); 3199 } 3200 shadow_iterator shadow_end() const { return shadow_iterator(); } 3201 3202 /// \brief Return the number of shadowed declarations associated with this 3203 /// using declaration. 3204 unsigned shadow_size() const { 3205 return std::distance(shadow_begin(), shadow_end()); 3206 } 3207 3208 void addShadowDecl(UsingShadowDecl *S); 3209 void removeShadowDecl(UsingShadowDecl *S); 3210 3211 static UsingDecl *Create(ASTContext &C, DeclContext *DC, 3212 SourceLocation UsingL, 3213 NestedNameSpecifierLoc QualifierLoc, 3214 const DeclarationNameInfo &NameInfo, 3215 bool HasTypenameKeyword); 3216 3217 static UsingDecl *CreateDeserialized(ASTContext &C, unsigned ID); 3218 3219 SourceRange getSourceRange() const override LLVM_READONLY; 3220 3221 /// Retrieves the canonical declaration of this declaration. 3222 UsingDecl *getCanonicalDecl() override { return getFirstDecl(); } 3223 const UsingDecl *getCanonicalDecl() const { return getFirstDecl(); } 3224 3225 static bool classof(const Decl *D) { return classofKind(D->getKind()); } 3226 static bool classofKind(Kind K) { return K == Using; } 3227 3228 friend class ASTDeclReader; 3229 friend class ASTDeclWriter; 3230 }; 3231 3232 /// Represents a pack of using declarations that a single 3233 /// using-declarator pack-expanded into. 3234 /// 3235 /// \code 3236 /// template<typename ...T> struct X : T... { 3237 /// using T::operator()...; 3238 /// using T::operator T...; 3239 /// }; 3240 /// \endcode 3241 /// 3242 /// In the second case above, the UsingPackDecl will have the name 3243 /// 'operator T' (which contains an unexpanded pack), but the individual 3244 /// UsingDecls and UsingShadowDecls will have more reasonable names. 3245 class UsingPackDecl final 3246 : public NamedDecl, public Mergeable<UsingPackDecl>, 3247 private llvm::TrailingObjects<UsingPackDecl, NamedDecl *> { 3248 void anchor() override; 3249 3250 /// The UnresolvedUsingValueDecl or UnresolvedUsingTypenameDecl from 3251 /// which this waas instantiated. 3252 NamedDecl *InstantiatedFrom; 3253 3254 /// The number of using-declarations created by this pack expansion. 3255 unsigned NumExpansions; 3256 3257 UsingPackDecl(DeclContext *DC, NamedDecl *InstantiatedFrom, 3258 ArrayRef<NamedDecl *> UsingDecls) 3259 : NamedDecl(UsingPack, DC, 3260 InstantiatedFrom ? InstantiatedFrom->getLocation() 3261 : SourceLocation(), 3262 InstantiatedFrom ? InstantiatedFrom->getDeclName() 3263 : DeclarationName()), 3264 InstantiatedFrom(InstantiatedFrom), NumExpansions(UsingDecls.size()) { 3265 std::uninitialized_copy(UsingDecls.begin(), UsingDecls.end(), 3266 getTrailingObjects<NamedDecl *>()); 3267 } 3268 3269 public: 3270 /// Get the using declaration from which this was instantiated. This will 3271 /// always be an UnresolvedUsingValueDecl or an UnresolvedUsingTypenameDecl 3272 /// that is a pack expansion. 3273 NamedDecl *getInstantiatedFromUsingDecl() const { return InstantiatedFrom; } 3274 3275 /// Get the set of using declarations that this pack expanded into. Note that 3276 /// some of these may still be unresolved. 3277 ArrayRef<NamedDecl *> expansions() const { 3278 return llvm::makeArrayRef(getTrailingObjects<NamedDecl *>(), NumExpansions); 3279 } 3280 3281 static UsingPackDecl *Create(ASTContext &C, DeclContext *DC, 3282 NamedDecl *InstantiatedFrom, 3283 ArrayRef<NamedDecl *> UsingDecls); 3284 3285 static UsingPackDecl *CreateDeserialized(ASTContext &C, unsigned ID, 3286 unsigned NumExpansions); 3287 3288 SourceRange getSourceRange() const override LLVM_READONLY { 3289 return InstantiatedFrom->getSourceRange(); 3290 } 3291 3292 UsingPackDecl *getCanonicalDecl() override { return getFirstDecl(); } 3293 const UsingPackDecl *getCanonicalDecl() const { return getFirstDecl(); } 3294 3295 static bool classof(const Decl *D) { return classofKind(D->getKind()); } 3296 static bool classofKind(Kind K) { return K == UsingPack; } 3297 3298 friend class ASTDeclReader; 3299 friend class ASTDeclWriter; 3300 friend TrailingObjects; 3301 }; 3302 3303 /// \brief Represents a dependent using declaration which was not marked with 3304 /// \c typename. 3305 /// 3306 /// Unlike non-dependent using declarations, these *only* bring through 3307 /// non-types; otherwise they would break two-phase lookup. 3308 /// 3309 /// \code 3310 /// template \<class T> class A : public Base<T> { 3311 /// using Base<T>::foo; 3312 /// }; 3313 /// \endcode 3314 class UnresolvedUsingValueDecl : public ValueDecl, 3315 public Mergeable<UnresolvedUsingValueDecl> { 3316 void anchor() override; 3317 3318 /// \brief The source location of the 'using' keyword 3319 SourceLocation UsingLocation; 3320 3321 /// \brief If this is a pack expansion, the location of the '...'. 3322 SourceLocation EllipsisLoc; 3323 3324 /// \brief The nested-name-specifier that precedes the name. 3325 NestedNameSpecifierLoc QualifierLoc; 3326 3327 /// \brief Provides source/type location info for the declaration name 3328 /// embedded in the ValueDecl base class. 3329 DeclarationNameLoc DNLoc; 3330 3331 UnresolvedUsingValueDecl(DeclContext *DC, QualType Ty, 3332 SourceLocation UsingLoc, 3333 NestedNameSpecifierLoc QualifierLoc, 3334 const DeclarationNameInfo &NameInfo, 3335 SourceLocation EllipsisLoc) 3336 : ValueDecl(UnresolvedUsingValue, DC, 3337 NameInfo.getLoc(), NameInfo.getName(), Ty), 3338 UsingLocation(UsingLoc), EllipsisLoc(EllipsisLoc), 3339 QualifierLoc(QualifierLoc), DNLoc(NameInfo.getInfo()) 3340 { } 3341 3342 public: 3343 /// \brief Returns the source location of the 'using' keyword. 3344 SourceLocation getUsingLoc() const { return UsingLocation; } 3345 3346 /// \brief Set the source location of the 'using' keyword. 3347 void setUsingLoc(SourceLocation L) { UsingLocation = L; } 3348 3349 /// \brief Return true if it is a C++03 access declaration (no 'using'). 3350 bool isAccessDeclaration() const { return UsingLocation.isInvalid(); } 3351 3352 /// \brief Retrieve the nested-name-specifier that qualifies the name, 3353 /// with source-location information. 3354 NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; } 3355 3356 /// \brief Retrieve the nested-name-specifier that qualifies the name. 3357 NestedNameSpecifier *getQualifier() const { 3358 return QualifierLoc.getNestedNameSpecifier(); 3359 } 3360 3361 DeclarationNameInfo getNameInfo() const { 3362 return DeclarationNameInfo(getDeclName(), getLocation(), DNLoc); 3363 } 3364 3365 /// \brief Determine whether this is a pack expansion. 3366 bool isPackExpansion() const { 3367 return EllipsisLoc.isValid(); 3368 } 3369 3370 /// \brief Get the location of the ellipsis if this is a pack expansion. 3371 SourceLocation getEllipsisLoc() const { 3372 return EllipsisLoc; 3373 } 3374 3375 static UnresolvedUsingValueDecl * 3376 Create(ASTContext &C, DeclContext *DC, SourceLocation UsingLoc, 3377 NestedNameSpecifierLoc QualifierLoc, 3378 const DeclarationNameInfo &NameInfo, SourceLocation EllipsisLoc); 3379 3380 static UnresolvedUsingValueDecl * 3381 CreateDeserialized(ASTContext &C, unsigned ID); 3382 3383 SourceRange getSourceRange() const override LLVM_READONLY; 3384 3385 /// Retrieves the canonical declaration of this declaration. 3386 UnresolvedUsingValueDecl *getCanonicalDecl() override { 3387 return getFirstDecl(); 3388 } 3389 const UnresolvedUsingValueDecl *getCanonicalDecl() const { 3390 return getFirstDecl(); 3391 } 3392 3393 static bool classof(const Decl *D) { return classofKind(D->getKind()); } 3394 static bool classofKind(Kind K) { return K == UnresolvedUsingValue; } 3395 3396 friend class ASTDeclReader; 3397 friend class ASTDeclWriter; 3398 }; 3399 3400 /// \brief Represents a dependent using declaration which was marked with 3401 /// \c typename. 3402 /// 3403 /// \code 3404 /// template \<class T> class A : public Base<T> { 3405 /// using typename Base<T>::foo; 3406 /// }; 3407 /// \endcode 3408 /// 3409 /// The type associated with an unresolved using typename decl is 3410 /// currently always a typename type. 3411 class UnresolvedUsingTypenameDecl 3412 : public TypeDecl, 3413 public Mergeable<UnresolvedUsingTypenameDecl> { 3414 void anchor() override; 3415 3416 /// \brief The source location of the 'typename' keyword 3417 SourceLocation TypenameLocation; 3418 3419 /// \brief If this is a pack expansion, the location of the '...'. 3420 SourceLocation EllipsisLoc; 3421 3422 /// \brief The nested-name-specifier that precedes the name. 3423 NestedNameSpecifierLoc QualifierLoc; 3424 3425 UnresolvedUsingTypenameDecl(DeclContext *DC, SourceLocation UsingLoc, 3426 SourceLocation TypenameLoc, 3427 NestedNameSpecifierLoc QualifierLoc, 3428 SourceLocation TargetNameLoc, 3429 IdentifierInfo *TargetName, 3430 SourceLocation EllipsisLoc) 3431 : TypeDecl(UnresolvedUsingTypename, DC, TargetNameLoc, TargetName, 3432 UsingLoc), 3433 TypenameLocation(TypenameLoc), EllipsisLoc(EllipsisLoc), 3434 QualifierLoc(QualifierLoc) { } 3435 3436 friend class ASTDeclReader; 3437 3438 public: 3439 /// \brief Returns the source location of the 'using' keyword. 3440 SourceLocation getUsingLoc() const { return getLocStart(); } 3441 3442 /// \brief Returns the source location of the 'typename' keyword. 3443 SourceLocation getTypenameLoc() const { return TypenameLocation; } 3444 3445 /// \brief Retrieve the nested-name-specifier that qualifies the name, 3446 /// with source-location information. 3447 NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; } 3448 3449 /// \brief Retrieve the nested-name-specifier that qualifies the name. 3450 NestedNameSpecifier *getQualifier() const { 3451 return QualifierLoc.getNestedNameSpecifier(); 3452 } 3453 3454 DeclarationNameInfo getNameInfo() const { 3455 return DeclarationNameInfo(getDeclName(), getLocation()); 3456 } 3457 3458 /// \brief Determine whether this is a pack expansion. 3459 bool isPackExpansion() const { 3460 return EllipsisLoc.isValid(); 3461 } 3462 3463 /// \brief Get the location of the ellipsis if this is a pack expansion. 3464 SourceLocation getEllipsisLoc() const { 3465 return EllipsisLoc; 3466 } 3467 3468 static UnresolvedUsingTypenameDecl * 3469 Create(ASTContext &C, DeclContext *DC, SourceLocation UsingLoc, 3470 SourceLocation TypenameLoc, NestedNameSpecifierLoc QualifierLoc, 3471 SourceLocation TargetNameLoc, DeclarationName TargetName, 3472 SourceLocation EllipsisLoc); 3473 3474 static UnresolvedUsingTypenameDecl * 3475 CreateDeserialized(ASTContext &C, unsigned ID); 3476 3477 /// Retrieves the canonical declaration of this declaration. 3478 UnresolvedUsingTypenameDecl *getCanonicalDecl() override { 3479 return getFirstDecl(); 3480 } 3481 const UnresolvedUsingTypenameDecl *getCanonicalDecl() const { 3482 return getFirstDecl(); 3483 } 3484 3485 static bool classof(const Decl *D) { return classofKind(D->getKind()); } 3486 static bool classofKind(Kind K) { return K == UnresolvedUsingTypename; } 3487 }; 3488 3489 /// \brief Represents a C++11 static_assert declaration. 3490 class StaticAssertDecl : public Decl { 3491 virtual void anchor(); 3492 llvm::PointerIntPair<Expr *, 1, bool> AssertExprAndFailed; 3493 StringLiteral *Message; 3494 SourceLocation RParenLoc; 3495 3496 StaticAssertDecl(DeclContext *DC, SourceLocation StaticAssertLoc, 3497 Expr *AssertExpr, StringLiteral *Message, 3498 SourceLocation RParenLoc, bool Failed) 3499 : Decl(StaticAssert, DC, StaticAssertLoc), 3500 AssertExprAndFailed(AssertExpr, Failed), Message(Message), 3501 RParenLoc(RParenLoc) { } 3502 3503 public: 3504 static StaticAssertDecl *Create(ASTContext &C, DeclContext *DC, 3505 SourceLocation StaticAssertLoc, 3506 Expr *AssertExpr, StringLiteral *Message, 3507 SourceLocation RParenLoc, bool Failed); 3508 static StaticAssertDecl *CreateDeserialized(ASTContext &C, unsigned ID); 3509 3510 Expr *getAssertExpr() { return AssertExprAndFailed.getPointer(); } 3511 const Expr *getAssertExpr() const { return AssertExprAndFailed.getPointer(); } 3512 3513 StringLiteral *getMessage() { return Message; } 3514 const StringLiteral *getMessage() const { return Message; } 3515 3516 bool isFailed() const { return AssertExprAndFailed.getInt(); } 3517 3518 SourceLocation getRParenLoc() const { return RParenLoc; } 3519 3520 SourceRange getSourceRange() const override LLVM_READONLY { 3521 return SourceRange(getLocation(), getRParenLoc()); 3522 } 3523 3524 static bool classof(const Decl *D) { return classofKind(D->getKind()); } 3525 static bool classofKind(Kind K) { return K == StaticAssert; } 3526 3527 friend class ASTDeclReader; 3528 }; 3529 3530 /// A binding in a decomposition declaration. For instance, given: 3531 /// 3532 /// int n[3]; 3533 /// auto &[a, b, c] = n; 3534 /// 3535 /// a, b, and c are BindingDecls, whose bindings are the expressions 3536 /// x[0], x[1], and x[2] respectively, where x is the implicit 3537 /// DecompositionDecl of type 'int (&)[3]'. 3538 class BindingDecl : public ValueDecl { 3539 void anchor() override; 3540 3541 /// The binding represented by this declaration. References to this 3542 /// declaration are effectively equivalent to this expression (except 3543 /// that it is only evaluated once at the point of declaration of the 3544 /// binding). 3545 Expr *Binding; 3546 3547 BindingDecl(DeclContext *DC, SourceLocation IdLoc, IdentifierInfo *Id) 3548 : ValueDecl(Decl::Binding, DC, IdLoc, Id, QualType()), Binding(nullptr) {} 3549 3550 public: 3551 static BindingDecl *Create(ASTContext &C, DeclContext *DC, 3552 SourceLocation IdLoc, IdentifierInfo *Id); 3553 static BindingDecl *CreateDeserialized(ASTContext &C, unsigned ID); 3554 3555 /// Get the expression to which this declaration is bound. This may be null 3556 /// in two different cases: while parsing the initializer for the 3557 /// decomposition declaration, and when the initializer is type-dependent. 3558 Expr *getBinding() const { return Binding; } 3559 3560 /// Get the variable (if any) that holds the value of evaluating the binding. 3561 /// Only present for user-defined bindings for tuple-like types. 3562 VarDecl *getHoldingVar() const; 3563 3564 /// Set the binding for this BindingDecl, along with its declared type (which 3565 /// should be a possibly-cv-qualified form of the type of the binding, or a 3566 /// reference to such a type). 3567 void setBinding(QualType DeclaredType, Expr *Binding) { 3568 setType(DeclaredType); 3569 this->Binding = Binding; 3570 } 3571 3572 static bool classof(const Decl *D) { return classofKind(D->getKind()); } 3573 static bool classofKind(Kind K) { return K == Decl::Binding; } 3574 3575 friend class ASTDeclReader; 3576 }; 3577 3578 /// A decomposition declaration. For instance, given: 3579 /// 3580 /// int n[3]; 3581 /// auto &[a, b, c] = n; 3582 /// 3583 /// the second line declares a DecompositionDecl of type 'int (&)[3]', and 3584 /// three BindingDecls (named a, b, and c). An instance of this class is always 3585 /// unnamed, but behaves in almost all other respects like a VarDecl. 3586 class DecompositionDecl final 3587 : public VarDecl, 3588 private llvm::TrailingObjects<DecompositionDecl, BindingDecl *> { 3589 void anchor() override; 3590 3591 /// The number of BindingDecl*s following this object. 3592 unsigned NumBindings; 3593 3594 DecompositionDecl(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, 3595 SourceLocation LSquareLoc, QualType T, 3596 TypeSourceInfo *TInfo, StorageClass SC, 3597 ArrayRef<BindingDecl *> Bindings) 3598 : VarDecl(Decomposition, C, DC, StartLoc, LSquareLoc, nullptr, T, TInfo, 3599 SC), 3600 NumBindings(Bindings.size()) { 3601 std::uninitialized_copy(Bindings.begin(), Bindings.end(), 3602 getTrailingObjects<BindingDecl *>()); 3603 } 3604 3605 public: 3606 static DecompositionDecl *Create(ASTContext &C, DeclContext *DC, 3607 SourceLocation StartLoc, 3608 SourceLocation LSquareLoc, 3609 QualType T, TypeSourceInfo *TInfo, 3610 StorageClass S, 3611 ArrayRef<BindingDecl *> Bindings); 3612 static DecompositionDecl *CreateDeserialized(ASTContext &C, unsigned ID, 3613 unsigned NumBindings); 3614 3615 ArrayRef<BindingDecl *> bindings() const { 3616 return llvm::makeArrayRef(getTrailingObjects<BindingDecl *>(), NumBindings); 3617 } 3618 3619 void printName(raw_ostream &os) const override; 3620 3621 static bool classof(const Decl *D) { return classofKind(D->getKind()); } 3622 static bool classofKind(Kind K) { return K == Decomposition; } 3623 3624 friend TrailingObjects; 3625 friend class ASTDeclReader; 3626 }; 3627 3628 /// An instance of this class represents the declaration of a property 3629 /// member. This is a Microsoft extension to C++, first introduced in 3630 /// Visual Studio .NET 2003 as a parallel to similar features in C# 3631 /// and Managed C++. 3632 /// 3633 /// A property must always be a non-static class member. 3634 /// 3635 /// A property member superficially resembles a non-static data 3636 /// member, except preceded by a property attribute: 3637 /// __declspec(property(get=GetX, put=PutX)) int x; 3638 /// Either (but not both) of the 'get' and 'put' names may be omitted. 3639 /// 3640 /// A reference to a property is always an lvalue. If the lvalue 3641 /// undergoes lvalue-to-rvalue conversion, then a getter name is 3642 /// required, and that member is called with no arguments. 3643 /// If the lvalue is assigned into, then a setter name is required, 3644 /// and that member is called with one argument, the value assigned. 3645 /// Both operations are potentially overloaded. Compound assignments 3646 /// are permitted, as are the increment and decrement operators. 3647 /// 3648 /// The getter and putter methods are permitted to be overloaded, 3649 /// although their return and parameter types are subject to certain 3650 /// restrictions according to the type of the property. 3651 /// 3652 /// A property declared using an incomplete array type may 3653 /// additionally be subscripted, adding extra parameters to the getter 3654 /// and putter methods. 3655 class MSPropertyDecl : public DeclaratorDecl { 3656 IdentifierInfo *GetterId, *SetterId; 3657 3658 MSPropertyDecl(DeclContext *DC, SourceLocation L, DeclarationName N, 3659 QualType T, TypeSourceInfo *TInfo, SourceLocation StartL, 3660 IdentifierInfo *Getter, IdentifierInfo *Setter) 3661 : DeclaratorDecl(MSProperty, DC, L, N, T, TInfo, StartL), 3662 GetterId(Getter), SetterId(Setter) {} 3663 3664 public: 3665 static MSPropertyDecl *Create(ASTContext &C, DeclContext *DC, 3666 SourceLocation L, DeclarationName N, QualType T, 3667 TypeSourceInfo *TInfo, SourceLocation StartL, 3668 IdentifierInfo *Getter, IdentifierInfo *Setter); 3669 static MSPropertyDecl *CreateDeserialized(ASTContext &C, unsigned ID); 3670 3671 static bool classof(const Decl *D) { return D->getKind() == MSProperty; } 3672 3673 bool hasGetter() const { return GetterId != nullptr; } 3674 IdentifierInfo* getGetterId() const { return GetterId; } 3675 bool hasSetter() const { return SetterId != nullptr; } 3676 IdentifierInfo* getSetterId() const { return SetterId; } 3677 3678 friend class ASTDeclReader; 3679 }; 3680 3681 /// Insertion operator for diagnostics. This allows sending an AccessSpecifier 3682 /// into a diagnostic with <<. 3683 const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 3684 AccessSpecifier AS); 3685 3686 const PartialDiagnostic &operator<<(const PartialDiagnostic &DB, 3687 AccessSpecifier AS); 3688 3689 } // end namespace clang 3690 3691 #endif 3692