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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/ASTUnresolvedSet.h"
20 : #include "clang/AST/Attr.h"
21 : #include "clang/AST/Decl.h"
22 : #include "clang/AST/Expr.h"
23 : #include "clang/AST/LambdaCapture.h"
24 : #include "llvm/ADT/DenseMap.h"
25 : #include "llvm/ADT/PointerIntPair.h"
26 : #include "llvm/Support/Compiler.h"
27 :
28 : namespace clang {
29 :
30 : class ClassTemplateDecl;
31 : class ClassTemplateSpecializationDecl;
32 : class CXXBasePath;
33 : class CXXBasePaths;
34 : class CXXConstructorDecl;
35 : class CXXConversionDecl;
36 : class CXXDestructorDecl;
37 : class CXXMethodDecl;
38 : class CXXRecordDecl;
39 : class CXXMemberLookupCriteria;
40 : class CXXFinalOverriderMap;
41 : class CXXIndirectPrimaryBaseSet;
42 : class FriendDecl;
43 : class LambdaExpr;
44 : class UsingDecl;
45 :
46 : /// \brief Represents any kind of function declaration, whether it is a
47 : /// concrete function or a function template.
48 : class AnyFunctionDecl {
49 : NamedDecl *Function;
50 :
51 : AnyFunctionDecl(NamedDecl *ND) : Function(ND) { }
52 :
53 : public:
54 : AnyFunctionDecl(FunctionDecl *FD) : Function(FD) { }
55 : AnyFunctionDecl(FunctionTemplateDecl *FTD);
56 :
57 : /// \brief Implicily converts any function or function template into a
58 : /// named declaration.
59 : operator NamedDecl *() const { return Function; }
60 :
61 : /// \brief Retrieve the underlying function or function template.
62 : NamedDecl *get() const { return Function; }
63 :
64 : static AnyFunctionDecl getFromNamedDecl(NamedDecl *ND) {
65 : return AnyFunctionDecl(ND);
66 : }
67 : };
68 :
69 : } // end namespace clang
70 :
71 : namespace llvm {
72 : // Provide PointerLikeTypeTraits for non-cvr pointers.
73 : template<>
74 : class PointerLikeTypeTraits< ::clang::AnyFunctionDecl> {
75 : public:
76 : static inline void *getAsVoidPointer(::clang::AnyFunctionDecl F) {
77 : return F.get();
78 : }
79 : static inline ::clang::AnyFunctionDecl getFromVoidPointer(void *P) {
80 : return ::clang::AnyFunctionDecl::getFromNamedDecl(
81 : static_cast< ::clang::NamedDecl*>(P));
82 : }
83 :
84 : enum { NumLowBitsAvailable = 2 };
85 : };
86 :
87 : } // end namespace llvm
88 :
89 : namespace clang {
90 :
91 : /// \brief Represents an access specifier followed by colon ':'.
92 : ///
93 : /// An objects of this class represents sugar for the syntactic occurrence
94 : /// of an access specifier followed by a colon in the list of member
95 : /// specifiers of a C++ class definition.
96 : ///
97 : /// Note that they do not represent other uses of access specifiers,
98 : /// such as those occurring in a list of base specifiers.
99 : /// Also note that this class has nothing to do with so-called
100 : /// "access declarations" (C++98 11.3 [class.access.dcl]).
101 : class AccessSpecDecl : public Decl {
102 : virtual void anchor();
103 : /// \brief The location of the ':'.
104 : SourceLocation ColonLoc;
105 :
106 : AccessSpecDecl(AccessSpecifier AS, DeclContext *DC,
107 : SourceLocation ASLoc, SourceLocation ColonLoc)
108 : : Decl(AccessSpec, DC, ASLoc), ColonLoc(ColonLoc) {
109 : setAccess(AS);
110 : }
111 : AccessSpecDecl(EmptyShell Empty)
112 : : Decl(AccessSpec, Empty) { }
113 : public:
114 : /// \brief The location of the access specifier.
115 : SourceLocation getAccessSpecifierLoc() const { return getLocation(); }
116 : /// \brief Sets the location of the access specifier.
117 : void setAccessSpecifierLoc(SourceLocation ASLoc) { setLocation(ASLoc); }
118 :
119 : /// \brief The location of the colon following the access specifier.
120 : SourceLocation getColonLoc() const { return ColonLoc; }
121 : /// \brief Sets the location of the colon.
122 : void setColonLoc(SourceLocation CLoc) { ColonLoc = CLoc; }
123 :
124 : SourceRange getSourceRange() const override LLVM_READONLY {
125 : return SourceRange(getAccessSpecifierLoc(), getColonLoc());
126 : }
127 :
128 : static AccessSpecDecl *Create(ASTContext &C, AccessSpecifier AS,
129 : DeclContext *DC, SourceLocation ASLoc,
130 : SourceLocation ColonLoc) {
131 : return new (C, DC) AccessSpecDecl(AS, DC, ASLoc, ColonLoc);
132 : }
133 : static AccessSpecDecl *CreateDeserialized(ASTContext &C, unsigned ID);
134 :
135 : // Implement isa/cast/dyncast/etc.
136 : static bool classof(const Decl *D) { return classofKind(D->getKind()); }
137 : static bool classofKind(Kind K) { return K == AccessSpec; }
138 : };
139 :
140 :
141 : /// \brief Represents a base class of a C++ class.
142 : ///
143 : /// Each CXXBaseSpecifier represents a single, direct base class (or
144 : /// struct) of a C++ class (or struct). It specifies the type of that
145 : /// base class, whether it is a virtual or non-virtual base, and what
146 : /// level of access (public, protected, private) is used for the
147 : /// derivation. For example:
148 : ///
149 : /// \code
150 : /// class A { };
151 : /// class B { };
152 : /// class C : public virtual A, protected B { };
153 : /// \endcode
154 : ///
155 : /// In this code, C will have two CXXBaseSpecifiers, one for "public
156 : /// virtual A" and the other for "protected B".
157 : class CXXBaseSpecifier {
158 : /// \brief The source code range that covers the full base
159 : /// specifier, including the "virtual" (if present) and access
160 : /// specifier (if present).
161 : SourceRange Range;
162 :
163 : /// \brief The source location of the ellipsis, if this is a pack
164 : /// expansion.
165 : SourceLocation EllipsisLoc;
166 :
167 : /// \brief Whether this is a virtual base class or not.
168 : bool Virtual : 1;
169 :
170 : /// \brief Whether this is the base of a class (true) or of a struct (false).
171 : ///
172 : /// This determines the mapping from the access specifier as written in the
173 : /// source code to the access specifier used for semantic analysis.
174 : bool BaseOfClass : 1;
175 :
176 : /// \brief Access specifier as written in the source code (may be AS_none).
177 : ///
178 : /// The actual type of data stored here is an AccessSpecifier, but we use
179 : /// "unsigned" here to work around a VC++ bug.
180 : unsigned Access : 2;
181 :
182 : /// \brief Whether the class contains a using declaration
183 : /// to inherit the named class's constructors.
184 : bool InheritConstructors : 1;
185 :
186 : /// \brief The type of the base class.
187 : ///
188 : /// This will be a class or struct (or a typedef of such). The source code
189 : /// range does not include the \c virtual or the access specifier.
190 : TypeSourceInfo *BaseTypeInfo;
191 :
192 : public:
193 : CXXBaseSpecifier() { }
194 :
195 : CXXBaseSpecifier(SourceRange R, bool V, bool BC, AccessSpecifier A,
196 : TypeSourceInfo *TInfo, SourceLocation EllipsisLoc)
197 : : Range(R), EllipsisLoc(EllipsisLoc), Virtual(V), BaseOfClass(BC),
198 : Access(A), InheritConstructors(false), BaseTypeInfo(TInfo) { }
199 :
200 : /// \brief Retrieves the source range that contains the entire base specifier.
201 : SourceRange getSourceRange() const LLVM_READONLY { return Range; }
202 : SourceLocation getLocStart() const LLVM_READONLY { return Range.getBegin(); }
203 : SourceLocation getLocEnd() const LLVM_READONLY { return Range.getEnd(); }
204 :
205 : /// \brief Determines whether the base class is a virtual base class (or not).
206 : bool isVirtual() const { return Virtual; }
207 :
208 : /// \brief Determine whether this base class is a base of a class declared
209 : /// with the 'class' keyword (vs. one declared with the 'struct' keyword).
210 : bool isBaseOfClass() const { return BaseOfClass; }
211 :
212 : /// \brief Determine whether this base specifier is a pack expansion.
213 : bool isPackExpansion() const { return EllipsisLoc.isValid(); }
214 :
215 : /// \brief Determine whether this base class's constructors get inherited.
216 : bool getInheritConstructors() const { return InheritConstructors; }
217 :
218 : /// \brief Set that this base class's constructors should be inherited.
219 : void setInheritConstructors(bool Inherit = true) {
220 : InheritConstructors = Inherit;
221 : }
222 :
223 : /// \brief For a pack expansion, determine the location of the ellipsis.
224 : SourceLocation getEllipsisLoc() const {
225 : return EllipsisLoc;
226 : }
227 :
228 : /// \brief Returns the access specifier for this base specifier.
229 : ///
230 : /// This is the actual base specifier as used for semantic analysis, so
231 : /// the result can never be AS_none. To retrieve the access specifier as
232 : /// written in the source code, use getAccessSpecifierAsWritten().
233 : AccessSpecifier getAccessSpecifier() const {
234 : if ((AccessSpecifier)Access == AS_none)
235 : return BaseOfClass? AS_private : AS_public;
236 : else
237 : return (AccessSpecifier)Access;
238 : }
239 :
240 : /// \brief Retrieves the access specifier as written in the source code
241 : /// (which may mean that no access specifier was explicitly written).
242 : ///
243 : /// Use getAccessSpecifier() to retrieve the access specifier for use in
244 : /// semantic analysis.
245 : AccessSpecifier getAccessSpecifierAsWritten() const {
246 : return (AccessSpecifier)Access;
247 : }
248 :
249 : /// \brief Retrieves the type of the base class.
250 : ///
251 : /// This type will always be an unqualified class type.
252 : QualType getType() const {
253 : return BaseTypeInfo->getType().getUnqualifiedType();
254 : }
255 :
256 : /// \brief Retrieves the type and source location of the base class.
257 0 : TypeSourceInfo *getTypeSourceInfo() const { return BaseTypeInfo; }
258 : };
259 :
260 : /// \brief A lazy pointer to the definition data for a declaration.
261 : /// FIXME: This is a little CXXRecordDecl-specific that the moment.
262 : template<typename Decl, typename T> class LazyDefinitionDataPtr {
263 : llvm::PointerUnion<T *, Decl *> DataOrCanonicalDecl;
264 :
265 : LazyDefinitionDataPtr update() {
266 39 : if (Decl *Canon = DataOrCanonicalDecl.template dyn_cast<Decl*>()) {
267 0 : if (Canon->isCanonicalDecl())
268 0 : Canon->getMostRecentDecl();
269 : else
270 : // Declaration isn't canonical any more;
271 : // update it and perform path compression.
272 0 : *this = Canon->getPreviousDecl()->DefinitionData.update();
273 0 : }
274 39 : return *this;
275 : }
276 :
277 : public:
278 : LazyDefinitionDataPtr(Decl *Canon) : DataOrCanonicalDecl(Canon) {}
279 : LazyDefinitionDataPtr(T *Data) : DataOrCanonicalDecl(Data) {}
280 39 : T *getNotUpdated() { return DataOrCanonicalDecl.template dyn_cast<T*>(); }
281 39 : T *get() { return update().getNotUpdated(); }
282 : };
283 :
284 : /// \brief Represents a C++ struct/union/class.
285 : class CXXRecordDecl : public RecordDecl {
286 :
287 : friend void TagDecl::startDefinition();
288 :
289 : /// Values used in DefinitionData fields to represent special members.
290 : enum SpecialMemberFlags {
291 : SMF_DefaultConstructor = 0x1,
292 : SMF_CopyConstructor = 0x2,
293 : SMF_MoveConstructor = 0x4,
294 : SMF_CopyAssignment = 0x8,
295 : SMF_MoveAssignment = 0x10,
296 : SMF_Destructor = 0x20,
297 : SMF_All = 0x3f
298 : };
299 :
300 : struct DefinitionData {
301 : DefinitionData(CXXRecordDecl *D);
302 :
303 : /// \brief True if this class has any user-declared constructors.
304 : bool UserDeclaredConstructor : 1;
305 :
306 : /// \brief The user-declared special members which this class has.
307 : unsigned UserDeclaredSpecialMembers : 6;
308 :
309 : /// \brief True when this class is an aggregate.
310 : bool Aggregate : 1;
311 :
312 : /// \brief True when this class is a POD-type.
313 : bool PlainOldData : 1;
314 :
315 : /// true when this class is empty for traits purposes,
316 : /// i.e. has no data members other than 0-width bit-fields, has no
317 : /// virtual function/base, and doesn't inherit from a non-empty
318 : /// class. Doesn't take union-ness into account.
319 : bool Empty : 1;
320 :
321 : /// \brief True when this class is polymorphic, i.e., has at
322 : /// least one virtual member or derives from a polymorphic class.
323 : bool Polymorphic : 1;
324 :
325 : /// \brief True when this class is abstract, i.e., has at least
326 : /// one pure virtual function, (that can come from a base class).
327 : bool Abstract : 1;
328 :
329 : /// \brief True when this class has standard layout.
330 : ///
331 : /// C++11 [class]p7. A standard-layout class is a class that:
332 : /// * has no non-static data members of type non-standard-layout class (or
333 : /// array of such types) or reference,
334 : /// * has no virtual functions (10.3) and no virtual base classes (10.1),
335 : /// * has the same access control (Clause 11) for all non-static data
336 : /// members
337 : /// * has no non-standard-layout base classes,
338 : /// * either has no non-static data members in the most derived class and at
339 : /// most one base class with non-static data members, or has no base
340 : /// classes with non-static data members, and
341 : /// * has no base classes of the same type as the first non-static data
342 : /// member.
343 : bool IsStandardLayout : 1;
344 :
345 : /// \brief True when there are no non-empty base classes.
346 : ///
347 : /// This is a helper bit of state used to implement IsStandardLayout more
348 : /// efficiently.
349 : bool HasNoNonEmptyBases : 1;
350 :
351 : /// \brief True when there are private non-static data members.
352 : bool HasPrivateFields : 1;
353 :
354 : /// \brief True when there are protected non-static data members.
355 : bool HasProtectedFields : 1;
356 :
357 : /// \brief True when there are private non-static data members.
358 : bool HasPublicFields : 1;
359 :
360 : /// \brief True if this class (or any subobject) has mutable fields.
361 : bool HasMutableFields : 1;
362 :
363 : /// \brief True if this class (or any nested anonymous struct or union)
364 : /// has variant members.
365 : bool HasVariantMembers : 1;
366 :
367 : /// \brief True if there no non-field members declared by the user.
368 : bool HasOnlyCMembers : 1;
369 :
370 : /// \brief True if any field has an in-class initializer, including those
371 : /// within anonymous unions or structs.
372 : bool HasInClassInitializer : 1;
373 :
374 : /// \brief True if any field is of reference type, and does not have an
375 : /// in-class initializer.
376 : ///
377 : /// In this case, value-initialization of this class is illegal in C++98
378 : /// even if the class has a trivial default constructor.
379 : bool HasUninitializedReferenceMember : 1;
380 :
381 : /// \brief These flags are \c true if a defaulted corresponding special
382 : /// member can't be fully analyzed without performing overload resolution.
383 : /// @{
384 : bool NeedOverloadResolutionForMoveConstructor : 1;
385 : bool NeedOverloadResolutionForMoveAssignment : 1;
386 : bool NeedOverloadResolutionForDestructor : 1;
387 : /// @}
388 :
389 : /// \brief These flags are \c true if an implicit defaulted corresponding
390 : /// special member would be defined as deleted.
391 : /// @{
392 : bool DefaultedMoveConstructorIsDeleted : 1;
393 : bool DefaultedMoveAssignmentIsDeleted : 1;
394 : bool DefaultedDestructorIsDeleted : 1;
395 : /// @}
396 :
397 : /// \brief The trivial special members which this class has, per
398 : /// C++11 [class.ctor]p5, C++11 [class.copy]p12, C++11 [class.copy]p25,
399 : /// C++11 [class.dtor]p5, or would have if the member were not suppressed.
400 : ///
401 : /// This excludes any user-declared but not user-provided special members
402 : /// which have been declared but not yet defined.
403 : unsigned HasTrivialSpecialMembers : 6;
404 :
405 : /// \brief The declared special members of this class which are known to be
406 : /// non-trivial.
407 : ///
408 : /// This excludes any user-declared but not user-provided special members
409 : /// which have been declared but not yet defined, and any implicit special
410 : /// members which have not yet been declared.
411 : unsigned DeclaredNonTrivialSpecialMembers : 6;
412 :
413 : /// \brief True when this class has a destructor with no semantic effect.
414 : bool HasIrrelevantDestructor : 1;
415 :
416 : /// \brief True when this class has at least one user-declared constexpr
417 : /// constructor which is neither the copy nor move constructor.
418 : bool HasConstexprNonCopyMoveConstructor : 1;
419 :
420 : /// \brief True if a defaulted default constructor for this class would
421 : /// be constexpr.
422 : bool DefaultedDefaultConstructorIsConstexpr : 1;
423 :
424 : /// \brief True if this class has a constexpr default constructor.
425 : ///
426 : /// This is true for either a user-declared constexpr default constructor
427 : /// or an implicitly declared constexpr default constructor.
428 : bool HasConstexprDefaultConstructor : 1;
429 :
430 : /// \brief True when this class contains at least one non-static data
431 : /// member or base class of non-literal or volatile type.
432 : bool HasNonLiteralTypeFieldsOrBases : 1;
433 :
434 : /// \brief True when visible conversion functions are already computed
435 : /// and are available.
436 : bool ComputedVisibleConversions : 1;
437 :
438 : /// \brief Whether we have a C++11 user-provided default constructor (not
439 : /// explicitly deleted or defaulted).
440 : bool UserProvidedDefaultConstructor : 1;
441 :
442 : /// \brief The special members which have been declared for this class,
443 : /// either by the user or implicitly.
444 : unsigned DeclaredSpecialMembers : 6;
445 :
446 : /// \brief Whether an implicit copy constructor would have a const-qualified
447 : /// parameter.
448 : bool ImplicitCopyConstructorHasConstParam : 1;
449 :
450 : /// \brief Whether an implicit copy assignment operator would have a
451 : /// const-qualified parameter.
452 : bool ImplicitCopyAssignmentHasConstParam : 1;
453 :
454 : /// \brief Whether any declared copy constructor has a const-qualified
455 : /// parameter.
456 : bool HasDeclaredCopyConstructorWithConstParam : 1;
457 :
458 : /// \brief Whether any declared copy assignment operator has either a
459 : /// const-qualified reference parameter or a non-reference parameter.
460 : bool HasDeclaredCopyAssignmentWithConstParam : 1;
461 :
462 : /// \brief Whether this class describes a C++ lambda.
463 : bool IsLambda : 1;
464 :
465 : /// \brief Whether we are currently parsing base specifiers.
466 : bool IsParsingBaseSpecifiers : 1;
467 :
468 : /// \brief The number of base class specifiers in Bases.
469 : unsigned NumBases;
470 :
471 : /// \brief The number of virtual base class specifiers in VBases.
472 : unsigned NumVBases;
473 :
474 : /// \brief Base classes of this class.
475 : ///
476 : /// FIXME: This is wasted space for a union.
477 : LazyCXXBaseSpecifiersPtr Bases;
478 :
479 : /// \brief direct and indirect virtual base classes of this class.
480 : LazyCXXBaseSpecifiersPtr VBases;
481 :
482 : /// \brief The conversion functions of this C++ class (but not its
483 : /// inherited conversion functions).
484 : ///
485 : /// Each of the entries in this overload set is a CXXConversionDecl.
486 : LazyASTUnresolvedSet Conversions;
487 :
488 : /// \brief The conversion functions of this C++ class and all those
489 : /// inherited conversion functions that are visible in this class.
490 : ///
491 : /// Each of the entries in this overload set is a CXXConversionDecl or a
492 : /// FunctionTemplateDecl.
493 : LazyASTUnresolvedSet VisibleConversions;
494 :
495 : /// \brief The declaration which defines this record.
496 : CXXRecordDecl *Definition;
497 :
498 : /// \brief The first friend declaration in this class, or null if there
499 : /// aren't any.
500 : ///
501 : /// This is actually currently stored in reverse order.
502 : LazyDeclPtr FirstFriend;
503 :
504 : /// \brief Retrieve the set of direct base classes.
505 : CXXBaseSpecifier *getBases() const {
506 26 : if (!Bases.isOffset())
507 26 : return Bases.get(nullptr);
508 0 : return getBasesSlowCase();
509 26 : }
510 :
511 : /// \brief Retrieve the set of virtual base classes.
512 : CXXBaseSpecifier *getVBases() const {
513 : if (!VBases.isOffset())
514 : return VBases.get(nullptr);
515 : return getVBasesSlowCase();
516 : }
517 :
518 : private:
519 : CXXBaseSpecifier *getBasesSlowCase() const;
520 : CXXBaseSpecifier *getVBasesSlowCase() const;
521 : };
522 :
523 : typedef LazyDefinitionDataPtr<CXXRecordDecl, struct DefinitionData>
524 : DefinitionDataPtr;
525 : friend class LazyDefinitionDataPtr<CXXRecordDecl, struct DefinitionData>;
526 :
527 : mutable DefinitionDataPtr DefinitionData;
528 :
529 : /// \brief Describes a C++ closure type (generated by a lambda expression).
530 : struct LambdaDefinitionData : public DefinitionData {
531 : typedef LambdaCapture Capture;
532 :
533 : LambdaDefinitionData(CXXRecordDecl *D, TypeSourceInfo *Info,
534 : bool Dependent, bool IsGeneric,
535 : LambdaCaptureDefault CaptureDefault)
536 : : DefinitionData(D), Dependent(Dependent), IsGenericLambda(IsGeneric),
537 : CaptureDefault(CaptureDefault), NumCaptures(0), NumExplicitCaptures(0),
538 : ManglingNumber(0), ContextDecl(nullptr), Captures(nullptr),
539 : MethodTyInfo(Info) {
540 : IsLambda = true;
541 :
542 : // C++11 [expr.prim.lambda]p3:
543 : // This class type is neither an aggregate nor a literal type.
544 : Aggregate = false;
545 : PlainOldData = false;
546 : HasNonLiteralTypeFieldsOrBases = true;
547 : }
548 :
549 : /// \brief Whether this lambda is known to be dependent, even if its
550 : /// context isn't dependent.
551 : ///
552 : /// A lambda with a non-dependent context can be dependent if it occurs
553 : /// within the default argument of a function template, because the
554 : /// lambda will have been created with the enclosing context as its
555 : /// declaration context, rather than function. This is an unfortunate
556 : /// artifact of having to parse the default arguments before.
557 : unsigned Dependent : 1;
558 :
559 : /// \brief Whether this lambda is a generic lambda.
560 : unsigned IsGenericLambda : 1;
561 :
562 : /// \brief The Default Capture.
563 : unsigned CaptureDefault : 2;
564 :
565 : /// \brief The number of captures in this lambda is limited 2^NumCaptures.
566 : unsigned NumCaptures : 15;
567 :
568 : /// \brief The number of explicit captures in this lambda.
569 : unsigned NumExplicitCaptures : 13;
570 :
571 : /// \brief The number used to indicate this lambda expression for name
572 : /// mangling in the Itanium C++ ABI.
573 : unsigned ManglingNumber;
574 :
575 : /// \brief The declaration that provides context for this lambda, if the
576 : /// actual DeclContext does not suffice. This is used for lambdas that
577 : /// occur within default arguments of function parameters within the class
578 : /// or within a data member initializer.
579 : Decl *ContextDecl;
580 :
581 : /// \brief The list of captures, both explicit and implicit, for this
582 : /// lambda.
583 : Capture *Captures;
584 :
585 : /// \brief The type of the call method.
586 : TypeSourceInfo *MethodTyInfo;
587 :
588 : };
589 :
590 : struct DefinitionData &data() const {
591 39 : auto *DD = DefinitionData.get();
592 78 : assert(DD && "queried property of class with no definition");
593 39 : return *DD;
594 : }
595 :
596 : struct LambdaDefinitionData &getLambdaData() const {
597 : // No update required: a merged definition cannot change any lambda
598 : // properties.
599 : auto *DD = DefinitionData.getNotUpdated();
600 : assert(DD && DD->IsLambda && "queried lambda property of non-lambda class");
601 : return static_cast<LambdaDefinitionData&>(*DD);
602 : }
603 :
604 : /// \brief The template or declaration that this declaration
605 : /// describes or was instantiated from, respectively.
606 : ///
607 : /// For non-templates, this value will be null. For record
608 : /// declarations that describe a class template, this will be a
609 : /// pointer to a ClassTemplateDecl. For member
610 : /// classes of class template specializations, this will be the
611 : /// MemberSpecializationInfo referring to the member class that was
612 : /// instantiated or specialized.
613 : llvm::PointerUnion<ClassTemplateDecl*, MemberSpecializationInfo*>
614 : TemplateOrInstantiation;
615 :
616 : friend class DeclContext;
617 : friend class LambdaExpr;
618 :
619 : /// \brief Called from setBases and addedMember to notify the class that a
620 : /// direct or virtual base class or a member of class type has been added.
621 : void addedClassSubobject(CXXRecordDecl *Base);
622 :
623 : /// \brief Notify the class that member has been added.
624 : ///
625 : /// This routine helps maintain information about the class based on which
626 : /// members have been added. It will be invoked by DeclContext::addDecl()
627 : /// whenever a member is added to this record.
628 : void addedMember(Decl *D);
629 :
630 : void markedVirtualFunctionPure();
631 : friend void FunctionDecl::setPure(bool);
632 :
633 : friend class ASTNodeImporter;
634 :
635 : /// \brief Get the head of our list of friend declarations, possibly
636 : /// deserializing the friends from an external AST source.
637 : FriendDecl *getFirstFriend() const;
638 :
639 : protected:
640 : CXXRecordDecl(Kind K, TagKind TK, const ASTContext &C, DeclContext *DC,
641 : SourceLocation StartLoc, SourceLocation IdLoc,
642 : IdentifierInfo *Id, CXXRecordDecl *PrevDecl);
643 :
644 : public:
645 : /// \brief Iterator that traverses the base classes of a class.
646 : typedef CXXBaseSpecifier* base_class_iterator;
647 :
648 : /// \brief Iterator that traverses the base classes of a class.
649 : typedef const CXXBaseSpecifier* base_class_const_iterator;
650 :
651 : CXXRecordDecl *getCanonicalDecl() override {
652 : return cast<CXXRecordDecl>(RecordDecl::getCanonicalDecl());
653 : }
654 : const CXXRecordDecl *getCanonicalDecl() const {
655 : return const_cast<CXXRecordDecl*>(this)->getCanonicalDecl();
656 : }
657 :
658 : CXXRecordDecl *getPreviousDecl() {
659 0 : return cast_or_null<CXXRecordDecl>(
660 0 : static_cast<RecordDecl *>(this)->getPreviousDecl());
661 : }
662 : const CXXRecordDecl *getPreviousDecl() const {
663 : return const_cast<CXXRecordDecl*>(this)->getPreviousDecl();
664 : }
665 :
666 : CXXRecordDecl *getMostRecentDecl() {
667 0 : return cast<CXXRecordDecl>(
668 0 : static_cast<RecordDecl *>(this)->getMostRecentDecl());
669 : }
670 :
671 : const CXXRecordDecl *getMostRecentDecl() const {
672 : return const_cast<CXXRecordDecl*>(this)->getMostRecentDecl();
673 : }
674 :
675 : CXXRecordDecl *getDefinition() const {
676 : auto *DD = DefinitionData.get();
677 : return DD ? DD->Definition : nullptr;
678 : }
679 :
680 : bool hasDefinition() const { return DefinitionData.get(); }
681 :
682 : static CXXRecordDecl *Create(const ASTContext &C, TagKind TK, DeclContext *DC,
683 : SourceLocation StartLoc, SourceLocation IdLoc,
684 : IdentifierInfo *Id,
685 : CXXRecordDecl *PrevDecl = nullptr,
686 : bool DelayTypeCreation = false);
687 : static CXXRecordDecl *CreateLambda(const ASTContext &C, DeclContext *DC,
688 : TypeSourceInfo *Info, SourceLocation Loc,
689 : bool DependentLambda, bool IsGeneric,
690 : LambdaCaptureDefault CaptureDefault);
691 : static CXXRecordDecl *CreateDeserialized(const ASTContext &C, unsigned ID);
692 :
693 : bool isDynamicClass() const {
694 : return data().Polymorphic || data().NumVBases != 0;
695 : }
696 :
697 : void setIsParsingBaseSpecifiers() { data().IsParsingBaseSpecifiers = true; }
698 :
699 : bool isParsingBaseSpecifiers() const {
700 : return data().IsParsingBaseSpecifiers;
701 : }
702 :
703 : /// \brief Sets the base classes of this struct or class.
704 : void setBases(CXXBaseSpecifier const * const *Bases, unsigned NumBases);
705 :
706 : /// \brief Retrieves the number of base classes of this class.
707 : unsigned getNumBases() const { return data().NumBases; }
708 :
709 : typedef llvm::iterator_range<base_class_iterator> base_class_range;
710 : typedef llvm::iterator_range<base_class_const_iterator>
711 : base_class_const_range;
712 :
713 : base_class_range bases() {
714 13 : return base_class_range(bases_begin(), bases_end());
715 : }
716 : base_class_const_range bases() const {
717 : return base_class_const_range(bases_begin(), bases_end());
718 : }
719 :
720 26 : base_class_iterator bases_begin() { return data().getBases(); }
721 : base_class_const_iterator bases_begin() const { return data().getBases(); }
722 13 : base_class_iterator bases_end() { return bases_begin() + data().NumBases; }
723 : base_class_const_iterator bases_end() const {
724 : return bases_begin() + data().NumBases;
725 : }
726 :
727 : /// \brief Retrieves the number of virtual base classes of this class.
728 : unsigned getNumVBases() const { return data().NumVBases; }
729 :
730 : base_class_range vbases() {
731 : return base_class_range(vbases_begin(), vbases_end());
732 : }
733 : base_class_const_range vbases() const {
734 : return base_class_const_range(vbases_begin(), vbases_end());
735 : }
736 :
737 : base_class_iterator vbases_begin() { return data().getVBases(); }
738 : base_class_const_iterator vbases_begin() const { return data().getVBases(); }
739 : base_class_iterator vbases_end() { return vbases_begin() + data().NumVBases; }
740 : base_class_const_iterator vbases_end() const {
741 : return vbases_begin() + data().NumVBases;
742 : }
743 :
744 : /// \brief Determine whether this class has any dependent base classes which
745 : /// are not the current instantiation.
746 : bool hasAnyDependentBases() const;
747 :
748 : /// Iterator access to method members. The method iterator visits
749 : /// all method members of the class, including non-instance methods,
750 : /// special methods, etc.
751 : typedef specific_decl_iterator<CXXMethodDecl> method_iterator;
752 : typedef llvm::iterator_range<specific_decl_iterator<CXXMethodDecl>>
753 : method_range;
754 :
755 : method_range methods() const {
756 : return method_range(method_begin(), method_end());
757 : }
758 :
759 : /// \brief Method begin iterator. Iterates in the order the methods
760 : /// were declared.
761 : method_iterator method_begin() const {
762 : return method_iterator(decls_begin());
763 : }
764 : /// \brief Method past-the-end iterator.
765 : method_iterator method_end() const {
766 : return method_iterator(decls_end());
767 : }
768 :
769 : /// Iterator access to constructor members.
770 : typedef specific_decl_iterator<CXXConstructorDecl> ctor_iterator;
771 : typedef llvm::iterator_range<specific_decl_iterator<CXXConstructorDecl>>
772 : ctor_range;
773 :
774 : ctor_range ctors() const { return ctor_range(ctor_begin(), ctor_end()); }
775 :
776 : ctor_iterator ctor_begin() const {
777 : return ctor_iterator(decls_begin());
778 : }
779 : ctor_iterator ctor_end() const {
780 : return ctor_iterator(decls_end());
781 : }
782 :
783 : /// An iterator over friend declarations. All of these are defined
784 : /// in DeclFriend.h.
785 : class friend_iterator;
786 : typedef llvm::iterator_range<friend_iterator> friend_range;
787 :
788 : friend_range friends() const;
789 : friend_iterator friend_begin() const;
790 : friend_iterator friend_end() const;
791 : void pushFriendDecl(FriendDecl *FD);
792 :
793 : /// Determines whether this record has any friends.
794 : bool hasFriends() const {
795 : return data().FirstFriend.isValid();
796 : }
797 :
798 : /// \brief \c true if we know for sure that this class has a single,
799 : /// accessible, unambiguous move constructor that is not deleted.
800 : bool hasSimpleMoveConstructor() const {
801 : return !hasUserDeclaredMoveConstructor() && hasMoveConstructor() &&
802 : !data().DefaultedMoveConstructorIsDeleted;
803 : }
804 : /// \brief \c true if we know for sure that this class has a single,
805 : /// accessible, unambiguous move assignment operator that is not deleted.
806 : bool hasSimpleMoveAssignment() const {
807 : return !hasUserDeclaredMoveAssignment() && hasMoveAssignment() &&
808 : !data().DefaultedMoveAssignmentIsDeleted;
809 : }
810 : /// \brief \c true if we know for sure that this class has an accessible
811 : /// destructor that is not deleted.
812 : bool hasSimpleDestructor() const {
813 : return !hasUserDeclaredDestructor() &&
814 : !data().DefaultedDestructorIsDeleted;
815 : }
816 :
817 : /// \brief Determine whether this class has any default constructors.
818 : bool hasDefaultConstructor() const {
819 : return (data().DeclaredSpecialMembers & SMF_DefaultConstructor) ||
820 : needsImplicitDefaultConstructor();
821 : }
822 :
823 : /// \brief Determine if we need to declare a default constructor for
824 : /// this class.
825 : ///
826 : /// This value is used for lazy creation of default constructors.
827 : bool needsImplicitDefaultConstructor() const {
828 : return !data().UserDeclaredConstructor &&
829 : !(data().DeclaredSpecialMembers & SMF_DefaultConstructor) &&
830 : // C++14 [expr.prim.lambda]p20:
831 : // The closure type associated with a lambda-expression has no
832 : // default constructor.
833 : !isLambda();
834 : }
835 :
836 : /// \brief Determine whether this class has any user-declared constructors.
837 : ///
838 : /// When true, a default constructor will not be implicitly declared.
839 : bool hasUserDeclaredConstructor() const {
840 : return data().UserDeclaredConstructor;
841 : }
842 :
843 : /// \brief Whether this class has a user-provided default constructor
844 : /// per C++11.
845 : bool hasUserProvidedDefaultConstructor() const {
846 : return data().UserProvidedDefaultConstructor;
847 : }
848 :
849 : /// \brief Determine whether this class has a user-declared copy constructor.
850 : ///
851 : /// When false, a copy constructor will be implicitly declared.
852 : bool hasUserDeclaredCopyConstructor() const {
853 : return data().UserDeclaredSpecialMembers & SMF_CopyConstructor;
854 : }
855 :
856 : /// \brief Determine whether this class needs an implicit copy
857 : /// constructor to be lazily declared.
858 : bool needsImplicitCopyConstructor() const {
859 : return !(data().DeclaredSpecialMembers & SMF_CopyConstructor);
860 : }
861 :
862 : /// \brief Determine whether we need to eagerly declare a defaulted copy
863 : /// constructor for this class.
864 : bool needsOverloadResolutionForCopyConstructor() const {
865 : return data().HasMutableFields;
866 : }
867 :
868 : /// \brief Determine whether an implicit copy constructor for this type
869 : /// would have a parameter with a const-qualified reference type.
870 : bool implicitCopyConstructorHasConstParam() const {
871 : return data().ImplicitCopyConstructorHasConstParam;
872 : }
873 :
874 : /// \brief Determine whether this class has a copy constructor with
875 : /// a parameter type which is a reference to a const-qualified type.
876 : bool hasCopyConstructorWithConstParam() const {
877 : return data().HasDeclaredCopyConstructorWithConstParam ||
878 : (needsImplicitCopyConstructor() &&
879 : implicitCopyConstructorHasConstParam());
880 : }
881 :
882 : /// \brief Whether this class has a user-declared move constructor or
883 : /// assignment operator.
884 : ///
885 : /// When false, a move constructor and assignment operator may be
886 : /// implicitly declared.
887 : bool hasUserDeclaredMoveOperation() const {
888 : return data().UserDeclaredSpecialMembers &
889 : (SMF_MoveConstructor | SMF_MoveAssignment);
890 : }
891 :
892 : /// \brief Determine whether this class has had a move constructor
893 : /// declared by the user.
894 : bool hasUserDeclaredMoveConstructor() const {
895 : return data().UserDeclaredSpecialMembers & SMF_MoveConstructor;
896 : }
897 :
898 : /// \brief Determine whether this class has a move constructor.
899 : bool hasMoveConstructor() const {
900 : return (data().DeclaredSpecialMembers & SMF_MoveConstructor) ||
901 : needsImplicitMoveConstructor();
902 : }
903 :
904 : /// \brief Set that we attempted to declare an implicitly move
905 : /// constructor, but overload resolution failed so we deleted it.
906 : void setImplicitMoveConstructorIsDeleted() {
907 : assert((data().DefaultedMoveConstructorIsDeleted ||
908 : needsOverloadResolutionForMoveConstructor()) &&
909 : "move constructor should not be deleted");
910 : data().DefaultedMoveConstructorIsDeleted = true;
911 : }
912 :
913 : /// \brief Determine whether this class should get an implicit move
914 : /// constructor or if any existing special member function inhibits this.
915 : bool needsImplicitMoveConstructor() const {
916 : return !(data().DeclaredSpecialMembers & SMF_MoveConstructor) &&
917 : !hasUserDeclaredCopyConstructor() &&
918 : !hasUserDeclaredCopyAssignment() &&
919 : !hasUserDeclaredMoveAssignment() &&
920 : !hasUserDeclaredDestructor();
921 : }
922 :
923 : /// \brief Determine whether we need to eagerly declare a defaulted move
924 : /// constructor for this class.
925 : bool needsOverloadResolutionForMoveConstructor() const {
926 : return data().NeedOverloadResolutionForMoveConstructor;
927 : }
928 :
929 : /// \brief Determine whether this class has a user-declared copy assignment
930 : /// operator.
931 : ///
932 : /// When false, a copy assigment operator will be implicitly declared.
933 : bool hasUserDeclaredCopyAssignment() const {
934 : return data().UserDeclaredSpecialMembers & SMF_CopyAssignment;
935 : }
936 :
937 : /// \brief Determine whether this class needs an implicit copy
938 : /// assignment operator to be lazily declared.
939 : bool needsImplicitCopyAssignment() const {
940 : return !(data().DeclaredSpecialMembers & SMF_CopyAssignment);
941 : }
942 :
943 : /// \brief Determine whether we need to eagerly declare a defaulted copy
944 : /// assignment operator for this class.
945 : bool needsOverloadResolutionForCopyAssignment() const {
946 : return data().HasMutableFields;
947 : }
948 :
949 : /// \brief Determine whether an implicit copy assignment operator for this
950 : /// type would have a parameter with a const-qualified reference type.
951 : bool implicitCopyAssignmentHasConstParam() const {
952 : return data().ImplicitCopyAssignmentHasConstParam;
953 : }
954 :
955 : /// \brief Determine whether this class has a copy assignment operator with
956 : /// a parameter type which is a reference to a const-qualified type or is not
957 : /// a reference.
958 : bool hasCopyAssignmentWithConstParam() const {
959 : return data().HasDeclaredCopyAssignmentWithConstParam ||
960 : (needsImplicitCopyAssignment() &&
961 : implicitCopyAssignmentHasConstParam());
962 : }
963 :
964 : /// \brief Determine whether this class has had a move assignment
965 : /// declared by the user.
966 : bool hasUserDeclaredMoveAssignment() const {
967 : return data().UserDeclaredSpecialMembers & SMF_MoveAssignment;
968 : }
969 :
970 : /// \brief Determine whether this class has a move assignment operator.
971 : bool hasMoveAssignment() const {
972 : return (data().DeclaredSpecialMembers & SMF_MoveAssignment) ||
973 : needsImplicitMoveAssignment();
974 : }
975 :
976 : /// \brief Set that we attempted to declare an implicit move assignment
977 : /// operator, but overload resolution failed so we deleted it.
978 : void setImplicitMoveAssignmentIsDeleted() {
979 : assert((data().DefaultedMoveAssignmentIsDeleted ||
980 : needsOverloadResolutionForMoveAssignment()) &&
981 : "move assignment should not be deleted");
982 : data().DefaultedMoveAssignmentIsDeleted = true;
983 : }
984 :
985 : /// \brief Determine whether this class should get an implicit move
986 : /// assignment operator or if any existing special member function inhibits
987 : /// this.
988 : bool needsImplicitMoveAssignment() const {
989 : return !(data().DeclaredSpecialMembers & SMF_MoveAssignment) &&
990 : !hasUserDeclaredCopyConstructor() &&
991 : !hasUserDeclaredCopyAssignment() &&
992 : !hasUserDeclaredMoveConstructor() &&
993 : !hasUserDeclaredDestructor();
994 : }
995 :
996 : /// \brief Determine whether we need to eagerly declare a move assignment
997 : /// operator for this class.
998 : bool needsOverloadResolutionForMoveAssignment() const {
999 : return data().NeedOverloadResolutionForMoveAssignment;
1000 : }
1001 :
1002 : /// \brief Determine whether this class has a user-declared destructor.
1003 : ///
1004 : /// When false, a destructor will be implicitly declared.
1005 : bool hasUserDeclaredDestructor() const {
1006 : return data().UserDeclaredSpecialMembers & SMF_Destructor;
1007 : }
1008 :
1009 : /// \brief Determine whether this class needs an implicit destructor to
1010 : /// be lazily declared.
1011 : bool needsImplicitDestructor() const {
1012 : return !(data().DeclaredSpecialMembers & SMF_Destructor);
1013 : }
1014 :
1015 : /// \brief Determine whether we need to eagerly declare a destructor for this
1016 : /// class.
1017 : bool needsOverloadResolutionForDestructor() const {
1018 : return data().NeedOverloadResolutionForDestructor;
1019 : }
1020 :
1021 : /// \brief Determine whether this class describes a lambda function object.
1022 : bool isLambda() const {
1023 : // An update record can't turn a non-lambda into a lambda.
1024 : auto *DD = DefinitionData.getNotUpdated();
1025 : return DD && DD->IsLambda;
1026 : }
1027 :
1028 : /// \brief Determine whether this class describes a generic
1029 : /// lambda function object (i.e. function call operator is
1030 : /// a template).
1031 : bool isGenericLambda() const;
1032 :
1033 : /// \brief Retrieve the lambda call operator of the closure type
1034 : /// if this is a closure type.
1035 : CXXMethodDecl *getLambdaCallOperator() const;
1036 :
1037 : /// \brief Retrieve the lambda static invoker, the address of which
1038 : /// is returned by the conversion operator, and the body of which
1039 : /// is forwarded to the lambda call operator.
1040 : CXXMethodDecl *getLambdaStaticInvoker() const;
1041 :
1042 : /// \brief Retrieve the generic lambda's template parameter list.
1043 : /// Returns null if the class does not represent a lambda or a generic
1044 : /// lambda.
1045 : TemplateParameterList *getGenericLambdaTemplateParameterList() const;
1046 :
1047 : LambdaCaptureDefault getLambdaCaptureDefault() const {
1048 : assert(isLambda());
1049 : return static_cast<LambdaCaptureDefault>(getLambdaData().CaptureDefault);
1050 : }
1051 :
1052 : /// \brief For a closure type, retrieve the mapping from captured
1053 : /// variables and \c this to the non-static data members that store the
1054 : /// values or references of the captures.
1055 : ///
1056 : /// \param Captures Will be populated with the mapping from captured
1057 : /// variables to the corresponding fields.
1058 : ///
1059 : /// \param ThisCapture Will be set to the field declaration for the
1060 : /// \c this capture.
1061 : ///
1062 : /// \note No entries will be added for init-captures, as they do not capture
1063 : /// variables.
1064 : void getCaptureFields(llvm::DenseMap<const VarDecl *, FieldDecl *> &Captures,
1065 : FieldDecl *&ThisCapture) const;
1066 :
1067 : typedef const LambdaCapture *capture_const_iterator;
1068 : typedef llvm::iterator_range<capture_const_iterator> capture_const_range;
1069 :
1070 : capture_const_range captures() const {
1071 : return capture_const_range(captures_begin(), captures_end());
1072 : }
1073 : capture_const_iterator captures_begin() const {
1074 : return isLambda() ? getLambdaData().Captures : nullptr;
1075 : }
1076 : capture_const_iterator captures_end() const {
1077 : return isLambda() ? captures_begin() + getLambdaData().NumCaptures
1078 : : nullptr;
1079 : }
1080 :
1081 : typedef UnresolvedSetIterator conversion_iterator;
1082 : conversion_iterator conversion_begin() const {
1083 : return data().Conversions.get(getASTContext()).begin();
1084 : }
1085 : conversion_iterator conversion_end() const {
1086 : return data().Conversions.get(getASTContext()).end();
1087 : }
1088 :
1089 : /// Removes a conversion function from this class. The conversion
1090 : /// function must currently be a member of this class. Furthermore,
1091 : /// this class must currently be in the process of being defined.
1092 : void removeConversion(const NamedDecl *Old);
1093 :
1094 : /// \brief Get all conversion functions visible in current class,
1095 : /// including conversion function templates.
1096 : llvm::iterator_range<conversion_iterator> getVisibleConversionFunctions();
1097 :
1098 : /// Determine whether this class is an aggregate (C++ [dcl.init.aggr]),
1099 : /// which is a class with no user-declared constructors, no private
1100 : /// or protected non-static data members, no base classes, and no virtual
1101 : /// functions (C++ [dcl.init.aggr]p1).
1102 : bool isAggregate() const { return data().Aggregate; }
1103 :
1104 : /// \brief Whether this class has any in-class initializers
1105 : /// for non-static data members (including those in anonymous unions or
1106 : /// structs).
1107 : bool hasInClassInitializer() const { return data().HasInClassInitializer; }
1108 :
1109 : /// \brief Whether this class or any of its subobjects has any members of
1110 : /// reference type which would make value-initialization ill-formed.
1111 : ///
1112 : /// Per C++03 [dcl.init]p5:
1113 : /// - if T is a non-union class type without a user-declared constructor,
1114 : /// then every non-static data member and base-class component of T is
1115 : /// value-initialized [...] A program that calls for [...]
1116 : /// value-initialization of an entity of reference type is ill-formed.
1117 : bool hasUninitializedReferenceMember() const {
1118 : return !isUnion() && !hasUserDeclaredConstructor() &&
1119 : data().HasUninitializedReferenceMember;
1120 : }
1121 :
1122 : /// \brief Whether this class is a POD-type (C++ [class]p4)
1123 : ///
1124 : /// For purposes of this function a class is POD if it is an aggregate
1125 : /// that has no non-static non-POD data members, no reference data
1126 : /// members, no user-defined copy assignment operator and no
1127 : /// user-defined destructor.
1128 : ///
1129 : /// Note that this is the C++ TR1 definition of POD.
1130 : bool isPOD() const { return data().PlainOldData; }
1131 :
1132 : /// \brief True if this class is C-like, without C++-specific features, e.g.
1133 : /// it contains only public fields, no bases, tag kind is not 'class', etc.
1134 : bool isCLike() const;
1135 :
1136 : /// \brief Determine whether this is an empty class in the sense of
1137 : /// (C++11 [meta.unary.prop]).
1138 : ///
1139 : /// A non-union class is empty iff it has a virtual function, virtual base,
1140 : /// data member (other than 0-width bit-field) or inherits from a non-empty
1141 : /// class.
1142 : ///
1143 : /// \note This does NOT include a check for union-ness.
1144 : bool isEmpty() const { return data().Empty; }
1145 :
1146 : /// Whether this class is polymorphic (C++ [class.virtual]),
1147 : /// which means that the class contains or inherits a virtual function.
1148 : bool isPolymorphic() const { return data().Polymorphic; }
1149 :
1150 : /// \brief Determine whether this class has a pure virtual function.
1151 : ///
1152 : /// The class is is abstract per (C++ [class.abstract]p2) if it declares
1153 : /// a pure virtual function or inherits a pure virtual function that is
1154 : /// not overridden.
1155 : bool isAbstract() const { return data().Abstract; }
1156 :
1157 : /// \brief Determine whether this class has standard layout per
1158 : /// (C++ [class]p7)
1159 : bool isStandardLayout() const { return data().IsStandardLayout; }
1160 :
1161 : /// \brief Determine whether this class, or any of its class subobjects,
1162 : /// contains a mutable field.
1163 : bool hasMutableFields() const { return data().HasMutableFields; }
1164 :
1165 : /// \brief Determine whether this class has any variant members.
1166 : bool hasVariantMembers() const { return data().HasVariantMembers; }
1167 :
1168 : /// \brief Determine whether this class has a trivial default constructor
1169 : /// (C++11 [class.ctor]p5).
1170 : bool hasTrivialDefaultConstructor() const {
1171 : return hasDefaultConstructor() &&
1172 : (data().HasTrivialSpecialMembers & SMF_DefaultConstructor);
1173 : }
1174 :
1175 : /// \brief Determine whether this class has a non-trivial default constructor
1176 : /// (C++11 [class.ctor]p5).
1177 : bool hasNonTrivialDefaultConstructor() const {
1178 : return (data().DeclaredNonTrivialSpecialMembers & SMF_DefaultConstructor) ||
1179 : (needsImplicitDefaultConstructor() &&
1180 : !(data().HasTrivialSpecialMembers & SMF_DefaultConstructor));
1181 : }
1182 :
1183 : /// \brief Determine whether this class has at least one constexpr constructor
1184 : /// other than the copy or move constructors.
1185 : bool hasConstexprNonCopyMoveConstructor() const {
1186 : return data().HasConstexprNonCopyMoveConstructor ||
1187 : (needsImplicitDefaultConstructor() &&
1188 : defaultedDefaultConstructorIsConstexpr());
1189 : }
1190 :
1191 : /// \brief Determine whether a defaulted default constructor for this class
1192 : /// would be constexpr.
1193 : bool defaultedDefaultConstructorIsConstexpr() const {
1194 : return data().DefaultedDefaultConstructorIsConstexpr &&
1195 : (!isUnion() || hasInClassInitializer() || !hasVariantMembers());
1196 : }
1197 :
1198 : /// \brief Determine whether this class has a constexpr default constructor.
1199 : bool hasConstexprDefaultConstructor() const {
1200 : return data().HasConstexprDefaultConstructor ||
1201 : (needsImplicitDefaultConstructor() &&
1202 : defaultedDefaultConstructorIsConstexpr());
1203 : }
1204 :
1205 : /// \brief Determine whether this class has a trivial copy constructor
1206 : /// (C++ [class.copy]p6, C++11 [class.copy]p12)
1207 : bool hasTrivialCopyConstructor() const {
1208 : return data().HasTrivialSpecialMembers & SMF_CopyConstructor;
1209 : }
1210 :
1211 : /// \brief Determine whether this class has a non-trivial copy constructor
1212 : /// (C++ [class.copy]p6, C++11 [class.copy]p12)
1213 : bool hasNonTrivialCopyConstructor() const {
1214 : return data().DeclaredNonTrivialSpecialMembers & SMF_CopyConstructor ||
1215 : !hasTrivialCopyConstructor();
1216 : }
1217 :
1218 : /// \brief Determine whether this class has a trivial move constructor
1219 : /// (C++11 [class.copy]p12)
1220 : bool hasTrivialMoveConstructor() const {
1221 : return hasMoveConstructor() &&
1222 : (data().HasTrivialSpecialMembers & SMF_MoveConstructor);
1223 : }
1224 :
1225 : /// \brief Determine whether this class has a non-trivial move constructor
1226 : /// (C++11 [class.copy]p12)
1227 : bool hasNonTrivialMoveConstructor() const {
1228 : return (data().DeclaredNonTrivialSpecialMembers & SMF_MoveConstructor) ||
1229 : (needsImplicitMoveConstructor() &&
1230 : !(data().HasTrivialSpecialMembers & SMF_MoveConstructor));
1231 : }
1232 :
1233 : /// \brief Determine whether this class has a trivial copy assignment operator
1234 : /// (C++ [class.copy]p11, C++11 [class.copy]p25)
1235 : bool hasTrivialCopyAssignment() const {
1236 : return data().HasTrivialSpecialMembers & SMF_CopyAssignment;
1237 : }
1238 :
1239 : /// \brief Determine whether this class has a non-trivial copy assignment
1240 : /// operator (C++ [class.copy]p11, C++11 [class.copy]p25)
1241 : bool hasNonTrivialCopyAssignment() const {
1242 : return data().DeclaredNonTrivialSpecialMembers & SMF_CopyAssignment ||
1243 : !hasTrivialCopyAssignment();
1244 : }
1245 :
1246 : /// \brief Determine whether this class has a trivial move assignment operator
1247 : /// (C++11 [class.copy]p25)
1248 : bool hasTrivialMoveAssignment() const {
1249 : return hasMoveAssignment() &&
1250 : (data().HasTrivialSpecialMembers & SMF_MoveAssignment);
1251 : }
1252 :
1253 : /// \brief Determine whether this class has a non-trivial move assignment
1254 : /// operator (C++11 [class.copy]p25)
1255 : bool hasNonTrivialMoveAssignment() const {
1256 : return (data().DeclaredNonTrivialSpecialMembers & SMF_MoveAssignment) ||
1257 : (needsImplicitMoveAssignment() &&
1258 : !(data().HasTrivialSpecialMembers & SMF_MoveAssignment));
1259 : }
1260 :
1261 : /// \brief Determine whether this class has a trivial destructor
1262 : /// (C++ [class.dtor]p3)
1263 : bool hasTrivialDestructor() const {
1264 : return data().HasTrivialSpecialMembers & SMF_Destructor;
1265 : }
1266 :
1267 : /// \brief Determine whether this class has a non-trivial destructor
1268 : /// (C++ [class.dtor]p3)
1269 : bool hasNonTrivialDestructor() const {
1270 : return !(data().HasTrivialSpecialMembers & SMF_Destructor);
1271 : }
1272 :
1273 : /// \brief Determine whether this class has a destructor which has no
1274 : /// semantic effect.
1275 : ///
1276 : /// Any such destructor will be trivial, public, defaulted and not deleted,
1277 : /// and will call only irrelevant destructors.
1278 : bool hasIrrelevantDestructor() const {
1279 : return data().HasIrrelevantDestructor;
1280 : }
1281 :
1282 : /// \brief Determine whether this class has a non-literal or/ volatile type
1283 : /// non-static data member or base class.
1284 : bool hasNonLiteralTypeFieldsOrBases() const {
1285 : return data().HasNonLiteralTypeFieldsOrBases;
1286 : }
1287 :
1288 : /// \brief Determine whether this class is considered trivially copyable per
1289 : /// (C++11 [class]p6).
1290 : bool isTriviallyCopyable() const;
1291 :
1292 : /// \brief Determine whether this class is considered trivial.
1293 : ///
1294 : /// C++11 [class]p6:
1295 : /// "A trivial class is a class that has a trivial default constructor and
1296 : /// is trivially copiable."
1297 : bool isTrivial() const {
1298 : return isTriviallyCopyable() && hasTrivialDefaultConstructor();
1299 : }
1300 :
1301 : /// \brief Determine whether this class is a literal type.
1302 : ///
1303 : /// C++11 [basic.types]p10:
1304 : /// A class type that has all the following properties:
1305 : /// - it has a trivial destructor
1306 : /// - every constructor call and full-expression in the
1307 : /// brace-or-equal-intializers for non-static data members (if any) is
1308 : /// a constant expression.
1309 : /// - it is an aggregate type or has at least one constexpr constructor
1310 : /// or constructor template that is not a copy or move constructor, and
1311 : /// - all of its non-static data members and base classes are of literal
1312 : /// types
1313 : ///
1314 : /// We resolve DR1361 by ignoring the second bullet. We resolve DR1452 by
1315 : /// treating types with trivial default constructors as literal types.
1316 : bool isLiteral() const {
1317 : return hasTrivialDestructor() &&
1318 : (isAggregate() || hasConstexprNonCopyMoveConstructor() ||
1319 : hasTrivialDefaultConstructor()) &&
1320 : !hasNonLiteralTypeFieldsOrBases();
1321 : }
1322 :
1323 : /// \brief If this record is an instantiation of a member class,
1324 : /// retrieves the member class from which it was instantiated.
1325 : ///
1326 : /// This routine will return non-null for (non-templated) member
1327 : /// classes of class templates. For example, given:
1328 : ///
1329 : /// \code
1330 : /// template<typename T>
1331 : /// struct X {
1332 : /// struct A { };
1333 : /// };
1334 : /// \endcode
1335 : ///
1336 : /// The declaration for X<int>::A is a (non-templated) CXXRecordDecl
1337 : /// whose parent is the class template specialization X<int>. For
1338 : /// this declaration, getInstantiatedFromMemberClass() will return
1339 : /// the CXXRecordDecl X<T>::A. When a complete definition of
1340 : /// X<int>::A is required, it will be instantiated from the
1341 : /// declaration returned by getInstantiatedFromMemberClass().
1342 : CXXRecordDecl *getInstantiatedFromMemberClass() const;
1343 :
1344 : /// \brief If this class is an instantiation of a member class of a
1345 : /// class template specialization, retrieves the member specialization
1346 : /// information.
1347 : MemberSpecializationInfo *getMemberSpecializationInfo() const {
1348 : return TemplateOrInstantiation.dyn_cast<MemberSpecializationInfo *>();
1349 : }
1350 :
1351 : /// \brief Specify that this record is an instantiation of the
1352 : /// member class \p RD.
1353 : void setInstantiationOfMemberClass(CXXRecordDecl *RD,
1354 : TemplateSpecializationKind TSK);
1355 :
1356 : /// \brief Retrieves the class template that is described by this
1357 : /// class declaration.
1358 : ///
1359 : /// Every class template is represented as a ClassTemplateDecl and a
1360 : /// CXXRecordDecl. The former contains template properties (such as
1361 : /// the template parameter lists) while the latter contains the
1362 : /// actual description of the template's
1363 : /// contents. ClassTemplateDecl::getTemplatedDecl() retrieves the
1364 : /// CXXRecordDecl that from a ClassTemplateDecl, while
1365 : /// getDescribedClassTemplate() retrieves the ClassTemplateDecl from
1366 : /// a CXXRecordDecl.
1367 : ClassTemplateDecl *getDescribedClassTemplate() const {
1368 : return TemplateOrInstantiation.dyn_cast<ClassTemplateDecl*>();
1369 : }
1370 :
1371 : void setDescribedClassTemplate(ClassTemplateDecl *Template) {
1372 : TemplateOrInstantiation = Template;
1373 : }
1374 :
1375 : /// \brief Determine whether this particular class is a specialization or
1376 : /// instantiation of a class template or member class of a class template,
1377 : /// and how it was instantiated or specialized.
1378 : TemplateSpecializationKind getTemplateSpecializationKind() const;
1379 :
1380 : /// \brief Set the kind of specialization or template instantiation this is.
1381 : void setTemplateSpecializationKind(TemplateSpecializationKind TSK);
1382 :
1383 : /// \brief Retrieve the record declaration from which this record could be
1384 : /// instantiated. Returns null if this class is not a template instantiation.
1385 : const CXXRecordDecl *getTemplateInstantiationPattern() const;
1386 :
1387 : CXXRecordDecl *getTemplateInstantiationPattern() {
1388 : return const_cast<CXXRecordDecl *>(const_cast<const CXXRecordDecl *>(this)
1389 : ->getTemplateInstantiationPattern());
1390 : }
1391 :
1392 : /// \brief Returns the destructor decl for this class.
1393 : CXXDestructorDecl *getDestructor() const;
1394 :
1395 : /// \brief Returns true if the class destructor, or any implicitly invoked
1396 : /// destructors are marked noreturn.
1397 : bool isAnyDestructorNoReturn() const;
1398 :
1399 : /// \brief If the class is a local class [class.local], returns
1400 : /// the enclosing function declaration.
1401 : const FunctionDecl *isLocalClass() const {
1402 : if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(getDeclContext()))
1403 : return RD->isLocalClass();
1404 :
1405 : return dyn_cast<FunctionDecl>(getDeclContext());
1406 : }
1407 :
1408 : FunctionDecl *isLocalClass() {
1409 : return const_cast<FunctionDecl*>(
1410 : const_cast<const CXXRecordDecl*>(this)->isLocalClass());
1411 : }
1412 :
1413 : /// \brief Determine whether this dependent class is a current instantiation,
1414 : /// when viewed from within the given context.
1415 : bool isCurrentInstantiation(const DeclContext *CurContext) const;
1416 :
1417 : /// \brief Determine whether this class is derived from the class \p Base.
1418 : ///
1419 : /// This routine only determines whether this class is derived from \p Base,
1420 : /// but does not account for factors that may make a Derived -> Base class
1421 : /// ill-formed, such as private/protected inheritance or multiple, ambiguous
1422 : /// base class subobjects.
1423 : ///
1424 : /// \param Base the base class we are searching for.
1425 : ///
1426 : /// \returns true if this class is derived from Base, false otherwise.
1427 : bool isDerivedFrom(const CXXRecordDecl *Base) const;
1428 :
1429 : /// \brief Determine whether this class is derived from the type \p Base.
1430 : ///
1431 : /// This routine only determines whether this class is derived from \p Base,
1432 : /// but does not account for factors that may make a Derived -> Base class
1433 : /// ill-formed, such as private/protected inheritance or multiple, ambiguous
1434 : /// base class subobjects.
1435 : ///
1436 : /// \param Base the base class we are searching for.
1437 : ///
1438 : /// \param Paths will contain the paths taken from the current class to the
1439 : /// given \p Base class.
1440 : ///
1441 : /// \returns true if this class is derived from \p Base, false otherwise.
1442 : ///
1443 : /// \todo add a separate parameter to configure IsDerivedFrom, rather than
1444 : /// tangling input and output in \p Paths
1445 : bool isDerivedFrom(const CXXRecordDecl *Base, CXXBasePaths &Paths) const;
1446 :
1447 : /// \brief Determine whether this class is virtually derived from
1448 : /// the class \p Base.
1449 : ///
1450 : /// This routine only determines whether this class is virtually
1451 : /// derived from \p Base, but does not account for factors that may
1452 : /// make a Derived -> Base class ill-formed, such as
1453 : /// private/protected inheritance or multiple, ambiguous base class
1454 : /// subobjects.
1455 : ///
1456 : /// \param Base the base class we are searching for.
1457 : ///
1458 : /// \returns true if this class is virtually derived from Base,
1459 : /// false otherwise.
1460 : bool isVirtuallyDerivedFrom(const CXXRecordDecl *Base) const;
1461 :
1462 : /// \brief Determine whether this class is provably not derived from
1463 : /// the type \p Base.
1464 : bool isProvablyNotDerivedFrom(const CXXRecordDecl *Base) const;
1465 :
1466 : /// \brief Function type used by forallBases() as a callback.
1467 : ///
1468 : /// \param BaseDefinition the definition of the base class
1469 : ///
1470 : /// \returns true if this base matched the search criteria
1471 : typedef bool ForallBasesCallback(const CXXRecordDecl *BaseDefinition,
1472 : void *UserData);
1473 :
1474 : /// \brief Determines if the given callback holds for all the direct
1475 : /// or indirect base classes of this type.
1476 : ///
1477 : /// The class itself does not count as a base class. This routine
1478 : /// returns false if the class has non-computable base classes.
1479 : ///
1480 : /// \param BaseMatches Callback invoked for each (direct or indirect) base
1481 : /// class of this type, or if \p AllowShortCircuit is true then until a call
1482 : /// returns false.
1483 : ///
1484 : /// \param UserData Passed as the second argument of every call to
1485 : /// \p BaseMatches.
1486 : ///
1487 : /// \param AllowShortCircuit if false, forces the callback to be called
1488 : /// for every base class, even if a dependent or non-matching base was
1489 : /// found.
1490 : bool forallBases(ForallBasesCallback *BaseMatches, void *UserData,
1491 : bool AllowShortCircuit = true) const;
1492 :
1493 : /// \brief Function type used by lookupInBases() to determine whether a
1494 : /// specific base class subobject matches the lookup criteria.
1495 : ///
1496 : /// \param Specifier the base-class specifier that describes the inheritance
1497 : /// from the base class we are trying to match.
1498 : ///
1499 : /// \param Path the current path, from the most-derived class down to the
1500 : /// base named by the \p Specifier.
1501 : ///
1502 : /// \param UserData a single pointer to user-specified data, provided to
1503 : /// lookupInBases().
1504 : ///
1505 : /// \returns true if this base matched the search criteria, false otherwise.
1506 : typedef bool BaseMatchesCallback(const CXXBaseSpecifier *Specifier,
1507 : CXXBasePath &Path,
1508 : void *UserData);
1509 :
1510 : /// \brief Look for entities within the base classes of this C++ class,
1511 : /// transitively searching all base class subobjects.
1512 : ///
1513 : /// This routine uses the callback function \p BaseMatches to find base
1514 : /// classes meeting some search criteria, walking all base class subobjects
1515 : /// and populating the given \p Paths structure with the paths through the
1516 : /// inheritance hierarchy that resulted in a match. On a successful search,
1517 : /// the \p Paths structure can be queried to retrieve the matching paths and
1518 : /// to determine if there were any ambiguities.
1519 : ///
1520 : /// \param BaseMatches callback function used to determine whether a given
1521 : /// base matches the user-defined search criteria.
1522 : ///
1523 : /// \param UserData user data pointer that will be provided to \p BaseMatches.
1524 : ///
1525 : /// \param Paths used to record the paths from this class to its base class
1526 : /// subobjects that match the search criteria.
1527 : ///
1528 : /// \returns true if there exists any path from this class to a base class
1529 : /// subobject that matches the search criteria.
1530 : bool lookupInBases(BaseMatchesCallback *BaseMatches, void *UserData,
1531 : CXXBasePaths &Paths) const;
1532 :
1533 : /// \brief Base-class lookup callback that determines whether the given
1534 : /// base class specifier refers to a specific class declaration.
1535 : ///
1536 : /// This callback can be used with \c lookupInBases() to determine whether
1537 : /// a given derived class has is a base class subobject of a particular type.
1538 : /// The user data pointer should refer to the canonical CXXRecordDecl of the
1539 : /// base class that we are searching for.
1540 : static bool FindBaseClass(const CXXBaseSpecifier *Specifier,
1541 : CXXBasePath &Path, void *BaseRecord);
1542 :
1543 : /// \brief Base-class lookup callback that determines whether the
1544 : /// given base class specifier refers to a specific class
1545 : /// declaration and describes virtual derivation.
1546 : ///
1547 : /// This callback can be used with \c lookupInBases() to determine
1548 : /// whether a given derived class has is a virtual base class
1549 : /// subobject of a particular type. The user data pointer should
1550 : /// refer to the canonical CXXRecordDecl of the base class that we
1551 : /// are searching for.
1552 : static bool FindVirtualBaseClass(const CXXBaseSpecifier *Specifier,
1553 : CXXBasePath &Path, void *BaseRecord);
1554 :
1555 : /// \brief Base-class lookup callback that determines whether there exists
1556 : /// a tag with the given name.
1557 : ///
1558 : /// This callback can be used with \c lookupInBases() to find tag members
1559 : /// of the given name within a C++ class hierarchy. The user data pointer
1560 : /// is an opaque \c DeclarationName pointer.
1561 : static bool FindTagMember(const CXXBaseSpecifier *Specifier,
1562 : CXXBasePath &Path, void *Name);
1563 :
1564 : /// \brief Base-class lookup callback that determines whether there exists
1565 : /// a member with the given name.
1566 : ///
1567 : /// This callback can be used with \c lookupInBases() to find members
1568 : /// of the given name within a C++ class hierarchy. The user data pointer
1569 : /// is an opaque \c DeclarationName pointer.
1570 : static bool FindOrdinaryMember(const CXXBaseSpecifier *Specifier,
1571 : CXXBasePath &Path, void *Name);
1572 :
1573 : /// \brief Base-class lookup callback that determines whether there exists
1574 : /// a member with the given name that can be used in a nested-name-specifier.
1575 : ///
1576 : /// This callback can be used with \c lookupInBases() to find membes of
1577 : /// the given name within a C++ class hierarchy that can occur within
1578 : /// nested-name-specifiers.
1579 : static bool FindNestedNameSpecifierMember(const CXXBaseSpecifier *Specifier,
1580 : CXXBasePath &Path,
1581 : void *UserData);
1582 :
1583 : /// \brief Retrieve the final overriders for each virtual member
1584 : /// function in the class hierarchy where this class is the
1585 : /// most-derived class in the class hierarchy.
1586 : void getFinalOverriders(CXXFinalOverriderMap &FinaOverriders) const;
1587 :
1588 : /// \brief Get the indirect primary bases for this class.
1589 : void getIndirectPrimaryBases(CXXIndirectPrimaryBaseSet& Bases) const;
1590 :
1591 : /// Renders and displays an inheritance diagram
1592 : /// for this C++ class and all of its base classes (transitively) using
1593 : /// GraphViz.
1594 : void viewInheritance(ASTContext& Context) const;
1595 :
1596 : /// \brief Calculates the access of a decl that is reached
1597 : /// along a path.
1598 : static AccessSpecifier MergeAccess(AccessSpecifier PathAccess,
1599 : AccessSpecifier DeclAccess) {
1600 : assert(DeclAccess != AS_none);
1601 : if (DeclAccess == AS_private) return AS_none;
1602 : return (PathAccess > DeclAccess ? PathAccess : DeclAccess);
1603 : }
1604 :
1605 : /// \brief Indicates that the declaration of a defaulted or deleted special
1606 : /// member function is now complete.
1607 : void finishedDefaultedOrDeletedMember(CXXMethodDecl *MD);
1608 :
1609 : /// \brief Indicates that the definition of this class is now complete.
1610 : void completeDefinition() override;
1611 :
1612 : /// \brief Indicates that the definition of this class is now complete,
1613 : /// and provides a final overrider map to help determine
1614 : ///
1615 : /// \param FinalOverriders The final overrider map for this class, which can
1616 : /// be provided as an optimization for abstract-class checking. If NULL,
1617 : /// final overriders will be computed if they are needed to complete the
1618 : /// definition.
1619 : void completeDefinition(CXXFinalOverriderMap *FinalOverriders);
1620 :
1621 : /// \brief Determine whether this class may end up being abstract, even though
1622 : /// it is not yet known to be abstract.
1623 : ///
1624 : /// \returns true if this class is not known to be abstract but has any
1625 : /// base classes that are abstract. In this case, \c completeDefinition()
1626 : /// will need to compute final overriders to determine whether the class is
1627 : /// actually abstract.
1628 : bool mayBeAbstract() const;
1629 :
1630 : /// \brief If this is the closure type of a lambda expression, retrieve the
1631 : /// number to be used for name mangling in the Itanium C++ ABI.
1632 : ///
1633 : /// Zero indicates that this closure type has internal linkage, so the
1634 : /// mangling number does not matter, while a non-zero value indicates which
1635 : /// lambda expression this is in this particular context.
1636 : unsigned getLambdaManglingNumber() const {
1637 : assert(isLambda() && "Not a lambda closure type!");
1638 : return getLambdaData().ManglingNumber;
1639 : }
1640 :
1641 : /// \brief Retrieve the declaration that provides additional context for a
1642 : /// lambda, when the normal declaration context is not specific enough.
1643 : ///
1644 : /// Certain contexts (default arguments of in-class function parameters and
1645 : /// the initializers of data members) have separate name mangling rules for
1646 : /// lambdas within the Itanium C++ ABI. For these cases, this routine provides
1647 : /// the declaration in which the lambda occurs, e.g., the function parameter
1648 : /// or the non-static data member. Otherwise, it returns NULL to imply that
1649 : /// the declaration context suffices.
1650 : Decl *getLambdaContextDecl() const {
1651 : assert(isLambda() && "Not a lambda closure type!");
1652 : return getLambdaData().ContextDecl;
1653 : }
1654 :
1655 : /// \brief Set the mangling number and context declaration for a lambda
1656 : /// class.
1657 : void setLambdaMangling(unsigned ManglingNumber, Decl *ContextDecl) {
1658 : getLambdaData().ManglingNumber = ManglingNumber;
1659 : getLambdaData().ContextDecl = ContextDecl;
1660 : }
1661 :
1662 : /// \brief Returns the inheritance model used for this record.
1663 : MSInheritanceAttr::Spelling getMSInheritanceModel() const;
1664 : /// \brief Calculate what the inheritance model would be for this class.
1665 : MSInheritanceAttr::Spelling calculateInheritanceModel() const;
1666 :
1667 : /// In the Microsoft C++ ABI, use zero for the field offset of a null data
1668 : /// member pointer if we can guarantee that zero is not a valid field offset,
1669 : /// or if the member pointer has multiple fields. Polymorphic classes have a
1670 : /// vfptr at offset zero, so we can use zero for null. If there are multiple
1671 : /// fields, we can use zero even if it is a valid field offset because
1672 : /// null-ness testing will check the other fields.
1673 : bool nullFieldOffsetIsZero() const {
1674 : return !MSInheritanceAttr::hasOnlyOneField(/*IsMemberFunction=*/false,
1675 : getMSInheritanceModel()) ||
1676 : (hasDefinition() && isPolymorphic());
1677 : }
1678 :
1679 : /// \brief Controls when vtordisps will be emitted if this record is used as a
1680 : /// virtual base.
1681 : MSVtorDispAttr::Mode getMSVtorDispMode() const;
1682 :
1683 : /// \brief Determine whether this lambda expression was known to be dependent
1684 : /// at the time it was created, even if its context does not appear to be
1685 : /// dependent.
1686 : ///
1687 : /// This flag is a workaround for an issue with parsing, where default
1688 : /// arguments are parsed before their enclosing function declarations have
1689 : /// been created. This means that any lambda expressions within those
1690 : /// default arguments will have as their DeclContext the context enclosing
1691 : /// the function declaration, which may be non-dependent even when the
1692 : /// function declaration itself is dependent. This flag indicates when we
1693 : /// know that the lambda is dependent despite that.
1694 : bool isDependentLambda() const {
1695 : return isLambda() && getLambdaData().Dependent;
1696 : }
1697 :
1698 : TypeSourceInfo *getLambdaTypeInfo() const {
1699 : return getLambdaData().MethodTyInfo;
1700 : }
1701 :
1702 0 : static bool classof(const Decl *D) { return classofKind(D->getKind()); }
1703 : static bool classofKind(Kind K) {
1704 0 : return K >= firstCXXRecord && K <= lastCXXRecord;
1705 : }
1706 :
1707 : friend class ASTDeclReader;
1708 : friend class ASTDeclWriter;
1709 : friend class ASTReader;
1710 : friend class ASTWriter;
1711 : };
1712 :
1713 : /// \brief Represents a static or instance method of a struct/union/class.
1714 : ///
1715 : /// In the terminology of the C++ Standard, these are the (static and
1716 : /// non-static) member functions, whether virtual or not.
1717 : class CXXMethodDecl : public FunctionDecl {
1718 : void anchor() override;
1719 : protected:
1720 : CXXMethodDecl(Kind DK, ASTContext &C, CXXRecordDecl *RD,
1721 : SourceLocation StartLoc, const DeclarationNameInfo &NameInfo,
1722 : QualType T, TypeSourceInfo *TInfo,
1723 : StorageClass SC, bool isInline,
1724 : bool isConstexpr, SourceLocation EndLocation)
1725 : : FunctionDecl(DK, C, RD, StartLoc, NameInfo, T, TInfo,
1726 : SC, isInline, isConstexpr) {
1727 : if (EndLocation.isValid())
1728 : setRangeEnd(EndLocation);
1729 : }
1730 :
1731 : public:
1732 : static CXXMethodDecl *Create(ASTContext &C, CXXRecordDecl *RD,
1733 : SourceLocation StartLoc,
1734 : const DeclarationNameInfo &NameInfo,
1735 : QualType T, TypeSourceInfo *TInfo,
1736 : StorageClass SC,
1737 : bool isInline,
1738 : bool isConstexpr,
1739 : SourceLocation EndLocation);
1740 :
1741 : static CXXMethodDecl *CreateDeserialized(ASTContext &C, unsigned ID);
1742 :
1743 : bool isStatic() const;
1744 : bool isInstance() const { return !isStatic(); }
1745 :
1746 : /// Returns true if the given operator is implicitly static in a record
1747 : /// context.
1748 : static bool isStaticOverloadedOperator(OverloadedOperatorKind OOK) {
1749 : // [class.free]p1:
1750 : // Any allocation function for a class T is a static member
1751 : // (even if not explicitly declared static).
1752 : // [class.free]p6 Any deallocation function for a class X is a static member
1753 : // (even if not explicitly declared static).
1754 : return OOK == OO_New || OOK == OO_Array_New || OOK == OO_Delete ||
1755 : OOK == OO_Array_Delete;
1756 : }
1757 :
1758 : bool isConst() const { return getType()->castAs<FunctionType>()->isConst(); }
1759 : bool isVolatile() const { return getType()->castAs<FunctionType>()->isVolatile(); }
1760 :
1761 : bool isVirtual() const {
1762 : CXXMethodDecl *CD =
1763 : cast<CXXMethodDecl>(const_cast<CXXMethodDecl*>(this)->getCanonicalDecl());
1764 :
1765 : // Member function is virtual if it is marked explicitly so, or if it is
1766 : // declared in __interface -- then it is automatically pure virtual.
1767 : if (CD->isVirtualAsWritten() || CD->isPure())
1768 : return true;
1769 :
1770 : return (CD->begin_overridden_methods() != CD->end_overridden_methods());
1771 : }
1772 :
1773 : /// \brief Determine whether this is a usual deallocation function
1774 : /// (C++ [basic.stc.dynamic.deallocation]p2), which is an overloaded
1775 : /// delete or delete[] operator with a particular signature.
1776 : bool isUsualDeallocationFunction() const;
1777 :
1778 : /// \brief Determine whether this is a copy-assignment operator, regardless
1779 : /// of whether it was declared implicitly or explicitly.
1780 : bool isCopyAssignmentOperator() const;
1781 :
1782 : /// \brief Determine whether this is a move assignment operator.
1783 : bool isMoveAssignmentOperator() const;
1784 :
1785 : CXXMethodDecl *getCanonicalDecl() override {
1786 : return cast<CXXMethodDecl>(FunctionDecl::getCanonicalDecl());
1787 : }
1788 : const CXXMethodDecl *getCanonicalDecl() const {
1789 : return const_cast<CXXMethodDecl*>(this)->getCanonicalDecl();
1790 : }
1791 :
1792 : CXXMethodDecl *getMostRecentDecl() {
1793 : return cast<CXXMethodDecl>(
1794 : static_cast<FunctionDecl *>(this)->getMostRecentDecl());
1795 : }
1796 : const CXXMethodDecl *getMostRecentDecl() const {
1797 : return const_cast<CXXMethodDecl*>(this)->getMostRecentDecl();
1798 : }
1799 :
1800 : /// True if this method is user-declared and was not
1801 : /// deleted or defaulted on its first declaration.
1802 : bool isUserProvided() const {
1803 : return !(isDeleted() || getCanonicalDecl()->isDefaulted());
1804 : }
1805 :
1806 : ///
1807 : void addOverriddenMethod(const CXXMethodDecl *MD);
1808 :
1809 : typedef const CXXMethodDecl *const* method_iterator;
1810 :
1811 : method_iterator begin_overridden_methods() const;
1812 : method_iterator end_overridden_methods() const;
1813 : unsigned size_overridden_methods() const;
1814 :
1815 : /// Returns the parent of this method declaration, which
1816 : /// is the class in which this method is defined.
1817 : const CXXRecordDecl *getParent() const {
1818 : return cast<CXXRecordDecl>(FunctionDecl::getParent());
1819 : }
1820 :
1821 : /// Returns the parent of this method declaration, which
1822 : /// is the class in which this method is defined.
1823 : CXXRecordDecl *getParent() {
1824 : return const_cast<CXXRecordDecl *>(
1825 : cast<CXXRecordDecl>(FunctionDecl::getParent()));
1826 : }
1827 :
1828 : /// \brief Returns the type of the \c this pointer.
1829 : ///
1830 : /// Should only be called for instance (i.e., non-static) methods.
1831 : QualType getThisType(ASTContext &C) const;
1832 :
1833 : unsigned getTypeQualifiers() const {
1834 : return getType()->getAs<FunctionProtoType>()->getTypeQuals();
1835 : }
1836 :
1837 : /// \brief Retrieve the ref-qualifier associated with this method.
1838 : ///
1839 : /// In the following example, \c f() has an lvalue ref-qualifier, \c g()
1840 : /// has an rvalue ref-qualifier, and \c h() has no ref-qualifier.
1841 : /// @code
1842 : /// struct X {
1843 : /// void f() &;
1844 : /// void g() &&;
1845 : /// void h();
1846 : /// };
1847 : /// @endcode
1848 : RefQualifierKind getRefQualifier() const {
1849 : return getType()->getAs<FunctionProtoType>()->getRefQualifier();
1850 : }
1851 :
1852 : bool hasInlineBody() const;
1853 :
1854 : /// \brief Determine whether this is a lambda closure type's static member
1855 : /// function that is used for the result of the lambda's conversion to
1856 : /// function pointer (for a lambda with no captures).
1857 : ///
1858 : /// The function itself, if used, will have a placeholder body that will be
1859 : /// supplied by IR generation to either forward to the function call operator
1860 : /// or clone the function call operator.
1861 : bool isLambdaStaticInvoker() const;
1862 :
1863 : /// \brief Find the method in \p RD that corresponds to this one.
1864 : ///
1865 : /// Find if \p RD or one of the classes it inherits from override this method.
1866 : /// If so, return it. \p RD is assumed to be a subclass of the class defining
1867 : /// this method (or be the class itself), unless \p MayBeBase is set to true.
1868 : CXXMethodDecl *
1869 : getCorrespondingMethodInClass(const CXXRecordDecl *RD,
1870 : bool MayBeBase = false);
1871 :
1872 : const CXXMethodDecl *
1873 : getCorrespondingMethodInClass(const CXXRecordDecl *RD,
1874 : bool MayBeBase = false) const {
1875 : return const_cast<CXXMethodDecl *>(this)
1876 : ->getCorrespondingMethodInClass(RD, MayBeBase);
1877 : }
1878 :
1879 : // Implement isa/cast/dyncast/etc.
1880 : static bool classof(const Decl *D) { return classofKind(D->getKind()); }
1881 : static bool classofKind(Kind K) {
1882 : return K >= firstCXXMethod && K <= lastCXXMethod;
1883 : }
1884 : };
1885 :
1886 : /// \brief Represents a C++ base or member initializer.
1887 : ///
1888 : /// This is part of a constructor initializer that
1889 : /// initializes one non-static member variable or one base class. For
1890 : /// example, in the following, both 'A(a)' and 'f(3.14159)' are member
1891 : /// initializers:
1892 : ///
1893 : /// \code
1894 : /// class A { };
1895 : /// class B : public A {
1896 : /// float f;
1897 : /// public:
1898 : /// B(A& a) : A(a), f(3.14159) { }
1899 : /// };
1900 : /// \endcode
1901 : class CXXCtorInitializer {
1902 : /// \brief Either the base class name/delegating constructor type (stored as
1903 : /// a TypeSourceInfo*), an normal field (FieldDecl), or an anonymous field
1904 : /// (IndirectFieldDecl*) being initialized.
1905 : llvm::PointerUnion3<TypeSourceInfo *, FieldDecl *, IndirectFieldDecl *>
1906 : Initializee;
1907 :
1908 : /// \brief The source location for the field name or, for a base initializer
1909 : /// pack expansion, the location of the ellipsis.
1910 : ///
1911 : /// In the case of a delegating
1912 : /// constructor, it will still include the type's source location as the
1913 : /// Initializee points to the CXXConstructorDecl (to allow loop detection).
1914 : SourceLocation MemberOrEllipsisLocation;
1915 :
1916 : /// \brief The argument used to initialize the base or member, which may
1917 : /// end up constructing an object (when multiple arguments are involved).
1918 : Stmt *Init;
1919 :
1920 : /// \brief Location of the left paren of the ctor-initializer.
1921 : SourceLocation LParenLoc;
1922 :
1923 : /// \brief Location of the right paren of the ctor-initializer.
1924 : SourceLocation RParenLoc;
1925 :
1926 : /// \brief If the initializee is a type, whether that type makes this
1927 : /// a delegating initialization.
1928 : bool IsDelegating : 1;
1929 :
1930 : /// \brief If the initializer is a base initializer, this keeps track
1931 : /// of whether the base is virtual or not.
1932 : bool IsVirtual : 1;
1933 :
1934 : /// \brief Whether or not the initializer is explicitly written
1935 : /// in the sources.
1936 : bool IsWritten : 1;
1937 :
1938 : /// If IsWritten is true, then this number keeps track of the textual order
1939 : /// of this initializer in the original sources, counting from 0; otherwise,
1940 : /// it stores the number of array index variables stored after this object
1941 : /// in memory.
1942 : unsigned SourceOrderOrNumArrayIndices : 13;
1943 :
1944 : CXXCtorInitializer(ASTContext &Context, FieldDecl *Member,
1945 : SourceLocation MemberLoc, SourceLocation L, Expr *Init,
1946 : SourceLocation R, VarDecl **Indices, unsigned NumIndices);
1947 :
1948 : public:
1949 : /// \brief Creates a new base-class initializer.
1950 : explicit
1951 : CXXCtorInitializer(ASTContext &Context, TypeSourceInfo *TInfo, bool IsVirtual,
1952 : SourceLocation L, Expr *Init, SourceLocation R,
1953 : SourceLocation EllipsisLoc);
1954 :
1955 : /// \brief Creates a new member initializer.
1956 : explicit
1957 : CXXCtorInitializer(ASTContext &Context, FieldDecl *Member,
1958 : SourceLocation MemberLoc, SourceLocation L, Expr *Init,
1959 : SourceLocation R);
1960 :
1961 : /// \brief Creates a new anonymous field initializer.
1962 : explicit
1963 : CXXCtorInitializer(ASTContext &Context, IndirectFieldDecl *Member,
1964 : SourceLocation MemberLoc, SourceLocation L, Expr *Init,
1965 : SourceLocation R);
1966 :
1967 : /// \brief Creates a new delegating initializer.
1968 : explicit
1969 : CXXCtorInitializer(ASTContext &Context, TypeSourceInfo *TInfo,
1970 : SourceLocation L, Expr *Init, SourceLocation R);
1971 :
1972 : /// \brief Creates a new member initializer that optionally contains
1973 : /// array indices used to describe an elementwise initialization.
1974 : static CXXCtorInitializer *Create(ASTContext &Context, FieldDecl *Member,
1975 : SourceLocation MemberLoc, SourceLocation L,
1976 : Expr *Init, SourceLocation R,
1977 : VarDecl **Indices, unsigned NumIndices);
1978 :
1979 : /// \brief Determine whether this initializer is initializing a base class.
1980 : bool isBaseInitializer() const {
1981 : return Initializee.is<TypeSourceInfo*>() && !IsDelegating;
1982 : }
1983 :
1984 : /// \brief Determine whether this initializer is initializing a non-static
1985 : /// data member.
1986 1 : bool isMemberInitializer() const { return Initializee.is<FieldDecl*>(); }
1987 :
1988 : bool isAnyMemberInitializer() const {
1989 : return isMemberInitializer() || isIndirectMemberInitializer();
1990 : }
1991 :
1992 : bool isIndirectMemberInitializer() const {
1993 0 : return Initializee.is<IndirectFieldDecl*>();
1994 : }
1995 :
1996 : /// \brief Determine whether this initializer is an implicit initializer
1997 : /// generated for a field with an initializer defined on the member
1998 : /// declaration.
1999 : ///
2000 : /// In-class member initializers (also known as "non-static data member
2001 : /// initializations", NSDMIs) were introduced in C++11.
2002 : bool isInClassMemberInitializer() const {
2003 : return Init->getStmtClass() == Stmt::CXXDefaultInitExprClass;
2004 : }
2005 :
2006 : /// \brief Determine whether this initializer is creating a delegating
2007 : /// constructor.
2008 : bool isDelegatingInitializer() const {
2009 : return Initializee.is<TypeSourceInfo*>() && IsDelegating;
2010 : }
2011 :
2012 : /// \brief Determine whether this initializer is a pack expansion.
2013 : bool isPackExpansion() const {
2014 : return isBaseInitializer() && MemberOrEllipsisLocation.isValid();
2015 : }
2016 :
2017 : // \brief For a pack expansion, returns the location of the ellipsis.
2018 : SourceLocation getEllipsisLoc() const {
2019 : assert(isPackExpansion() && "Initializer is not a pack expansion");
2020 : return MemberOrEllipsisLocation;
2021 : }
2022 :
2023 : /// If this is a base class initializer, returns the type of the
2024 : /// base class with location information. Otherwise, returns an NULL
2025 : /// type location.
2026 : TypeLoc getBaseClassLoc() const;
2027 :
2028 : /// If this is a base class initializer, returns the type of the base class.
2029 : /// Otherwise, returns null.
2030 : const Type *getBaseClass() const;
2031 :
2032 : /// Returns whether the base is virtual or not.
2033 : bool isBaseVirtual() const {
2034 : assert(isBaseInitializer() && "Must call this on base initializer!");
2035 :
2036 : return IsVirtual;
2037 : }
2038 :
2039 : /// \brief Returns the declarator information for a base class or delegating
2040 : /// initializer.
2041 : TypeSourceInfo *getTypeSourceInfo() const {
2042 2 : return Initializee.dyn_cast<TypeSourceInfo *>();
2043 : }
2044 :
2045 : /// \brief If this is a member initializer, returns the declaration of the
2046 : /// non-static data member being initialized. Otherwise, returns null.
2047 : FieldDecl *getMember() const {
2048 : if (isMemberInitializer())
2049 : return Initializee.get<FieldDecl*>();
2050 : return nullptr;
2051 : }
2052 : FieldDecl *getAnyMember() const {
2053 1 : if (isMemberInitializer())
2054 1 : return Initializee.get<FieldDecl*>();
2055 0 : if (isIndirectMemberInitializer())
2056 0 : return Initializee.get<IndirectFieldDecl*>()->getAnonField();
2057 0 : return nullptr;
2058 1 : }
2059 :
2060 : IndirectFieldDecl *getIndirectMember() const {
2061 : if (isIndirectMemberInitializer())
2062 : return Initializee.get<IndirectFieldDecl*>();
2063 : return nullptr;
2064 : }
2065 :
2066 : SourceLocation getMemberLocation() const {
2067 : return MemberOrEllipsisLocation;
2068 : }
2069 :
2070 : /// \brief Determine the source location of the initializer.
2071 : SourceLocation getSourceLocation() const;
2072 :
2073 : /// \brief Determine the source range covering the entire initializer.
2074 : SourceRange getSourceRange() const LLVM_READONLY;
2075 :
2076 : /// \brief Determine whether this initializer is explicitly written
2077 : /// in the source code.
2078 2 : bool isWritten() const { return IsWritten; }
2079 :
2080 : /// \brief Return the source position of the initializer, counting from 0.
2081 : /// If the initializer was implicit, -1 is returned.
2082 : int getSourceOrder() const {
2083 6 : return IsWritten ? static_cast<int>(SourceOrderOrNumArrayIndices) : -1;
2084 : }
2085 :
2086 : /// \brief Set the source order of this initializer.
2087 : ///
2088 : /// This can only be called once for each initializer; it cannot be called
2089 : /// on an initializer having a positive number of (implicit) array indices.
2090 : ///
2091 : /// This assumes that the initializer was written in the source code, and
2092 : /// ensures that isWritten() returns true.
2093 : void setSourceOrder(int pos) {
2094 : assert(!IsWritten &&
2095 : "calling twice setSourceOrder() on the same initializer");
2096 : assert(SourceOrderOrNumArrayIndices == 0 &&
2097 : "setSourceOrder() used when there are implicit array indices");
2098 : assert(pos >= 0 &&
2099 : "setSourceOrder() used to make an initializer implicit");
2100 : IsWritten = true;
2101 : SourceOrderOrNumArrayIndices = static_cast<unsigned>(pos);
2102 : }
2103 :
2104 : SourceLocation getLParenLoc() const { return LParenLoc; }
2105 : SourceLocation getRParenLoc() const { return RParenLoc; }
2106 :
2107 : /// \brief Determine the number of implicit array indices used while
2108 : /// described an array member initialization.
2109 : unsigned getNumArrayIndices() const {
2110 : return IsWritten ? 0 : SourceOrderOrNumArrayIndices;
2111 : }
2112 :
2113 : /// \brief Retrieve a particular array index variable used to
2114 : /// describe an array member initialization.
2115 : VarDecl *getArrayIndex(unsigned I) {
2116 : assert(I < getNumArrayIndices() && "Out of bounds member array index");
2117 : return reinterpret_cast<VarDecl **>(this + 1)[I];
2118 : }
2119 : const VarDecl *getArrayIndex(unsigned I) const {
2120 : assert(I < getNumArrayIndices() && "Out of bounds member array index");
2121 : return reinterpret_cast<const VarDecl * const *>(this + 1)[I];
2122 : }
2123 : void setArrayIndex(unsigned I, VarDecl *Index) {
2124 : assert(I < getNumArrayIndices() && "Out of bounds member array index");
2125 : reinterpret_cast<VarDecl **>(this + 1)[I] = Index;
2126 : }
2127 : ArrayRef<VarDecl *> getArrayIndexes() {
2128 : assert(getNumArrayIndices() != 0 && "Getting indexes for non-array init");
2129 : return llvm::makeArrayRef(reinterpret_cast<VarDecl **>(this + 1),
2130 : getNumArrayIndices());
2131 : }
2132 :
2133 : /// \brief Get the initializer.
2134 1 : Expr *getInit() const { return static_cast<Expr*>(Init); }
2135 : };
2136 :
2137 : /// \brief Represents a C++ constructor within a class.
2138 : ///
2139 : /// For example:
2140 : ///
2141 : /// \code
2142 : /// class X {
2143 : /// public:
2144 : /// explicit X(int); // represented by a CXXConstructorDecl.
2145 : /// };
2146 : /// \endcode
2147 : class CXXConstructorDecl : public CXXMethodDecl {
2148 : void anchor() override;
2149 : /// \brief Whether this constructor declaration has the \c explicit keyword
2150 : /// specified.
2151 : bool IsExplicitSpecified : 1;
2152 :
2153 : /// \name Support for base and member initializers.
2154 : /// \{
2155 : /// \brief The arguments used to initialize the base or member.
2156 : LazyCXXCtorInitializersPtr CtorInitializers;
2157 : unsigned NumCtorInitializers;
2158 : /// \}
2159 :
2160 : CXXConstructorDecl(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
2161 : const DeclarationNameInfo &NameInfo,
2162 : QualType T, TypeSourceInfo *TInfo,
2163 : bool isExplicitSpecified, bool isInline,
2164 : bool isImplicitlyDeclared, bool isConstexpr)
2165 : : CXXMethodDecl(CXXConstructor, C, RD, StartLoc, NameInfo, T, TInfo,
2166 : SC_None, isInline, isConstexpr, SourceLocation()),
2167 : IsExplicitSpecified(isExplicitSpecified), CtorInitializers(nullptr),
2168 : NumCtorInitializers(0) {
2169 : setImplicit(isImplicitlyDeclared);
2170 : }
2171 :
2172 : public:
2173 : static CXXConstructorDecl *CreateDeserialized(ASTContext &C, unsigned ID);
2174 : static CXXConstructorDecl *Create(ASTContext &C, CXXRecordDecl *RD,
2175 : SourceLocation StartLoc,
2176 : const DeclarationNameInfo &NameInfo,
2177 : QualType T, TypeSourceInfo *TInfo,
2178 : bool isExplicit,
2179 : bool isInline, bool isImplicitlyDeclared,
2180 : bool isConstexpr);
2181 :
2182 : /// \brief Determine whether this constructor declaration has the
2183 : /// \c explicit keyword specified.
2184 : bool isExplicitSpecified() const { return IsExplicitSpecified; }
2185 :
2186 : /// \brief Determine whether this constructor was marked "explicit" or not.
2187 : bool isExplicit() const {
2188 : return cast<CXXConstructorDecl>(getFirstDecl())->isExplicitSpecified();
2189 : }
2190 :
2191 : /// \brief Iterates through the member/base initializer list.
2192 : typedef CXXCtorInitializer **init_iterator;
2193 :
2194 : /// \brief Iterates through the member/base initializer list.
2195 : typedef CXXCtorInitializer *const *init_const_iterator;
2196 :
2197 : typedef llvm::iterator_range<init_iterator> init_range;
2198 : typedef llvm::iterator_range<init_const_iterator> init_const_range;
2199 :
2200 4 : init_range inits() { return init_range(init_begin(), init_end()); }
2201 : init_const_range inits() const {
2202 : return init_const_range(init_begin(), init_end());
2203 : }
2204 :
2205 : /// \brief Retrieve an iterator to the first initializer.
2206 : init_iterator init_begin() {
2207 18 : const auto *ConstThis = this;
2208 18 : return const_cast<init_iterator>(ConstThis->init_begin());
2209 : }
2210 : /// \brief Retrieve an iterator to the first initializer.
2211 : init_const_iterator init_begin() const;
2212 :
2213 : /// \brief Retrieve an iterator past the last initializer.
2214 : init_iterator init_end() {
2215 10 : return init_begin() + NumCtorInitializers;
2216 : }
2217 : /// \brief Retrieve an iterator past the last initializer.
2218 : init_const_iterator init_end() const {
2219 : return init_begin() + NumCtorInitializers;
2220 : }
2221 :
2222 : typedef std::reverse_iterator<init_iterator> init_reverse_iterator;
2223 : typedef std::reverse_iterator<init_const_iterator>
2224 : init_const_reverse_iterator;
2225 :
2226 : init_reverse_iterator init_rbegin() {
2227 : return init_reverse_iterator(init_end());
2228 : }
2229 : init_const_reverse_iterator init_rbegin() const {
2230 : return init_const_reverse_iterator(init_end());
2231 : }
2232 :
2233 : init_reverse_iterator init_rend() {
2234 : return init_reverse_iterator(init_begin());
2235 : }
2236 : init_const_reverse_iterator init_rend() const {
2237 : return init_const_reverse_iterator(init_begin());
2238 : }
2239 :
2240 : /// \brief Determine the number of arguments used to initialize the member
2241 : /// or base.
2242 : unsigned getNumCtorInitializers() const {
2243 : return NumCtorInitializers;
2244 : }
2245 :
2246 : void setNumCtorInitializers(unsigned numCtorInitializers) {
2247 : NumCtorInitializers = numCtorInitializers;
2248 : }
2249 :
2250 : void setCtorInitializers(CXXCtorInitializer **Initializers) {
2251 : CtorInitializers = Initializers;
2252 : }
2253 :
2254 : /// \brief Determine whether this constructor is a delegating constructor.
2255 : bool isDelegatingConstructor() const {
2256 : return (getNumCtorInitializers() == 1) &&
2257 : init_begin()[0]->isDelegatingInitializer();
2258 : }
2259 :
2260 : /// \brief When this constructor delegates to another, retrieve the target.
2261 : CXXConstructorDecl *getTargetConstructor() const;
2262 :
2263 : /// Whether this constructor is a default
2264 : /// constructor (C++ [class.ctor]p5), which can be used to
2265 : /// default-initialize a class of this type.
2266 : bool isDefaultConstructor() const;
2267 :
2268 : /// \brief Whether this constructor is a copy constructor (C++ [class.copy]p2,
2269 : /// which can be used to copy the class.
2270 : ///
2271 : /// \p TypeQuals will be set to the qualifiers on the
2272 : /// argument type. For example, \p TypeQuals would be set to \c
2273 : /// Qualifiers::Const for the following copy constructor:
2274 : ///
2275 : /// \code
2276 : /// class X {
2277 : /// public:
2278 : /// X(const X&);
2279 : /// };
2280 : /// \endcode
2281 : bool isCopyConstructor(unsigned &TypeQuals) const;
2282 :
2283 : /// Whether this constructor is a copy
2284 : /// constructor (C++ [class.copy]p2, which can be used to copy the
2285 : /// class.
2286 : bool isCopyConstructor() const {
2287 : unsigned TypeQuals = 0;
2288 : return isCopyConstructor(TypeQuals);
2289 : }
2290 :
2291 : /// \brief Determine whether this constructor is a move constructor
2292 : /// (C++0x [class.copy]p3), which can be used to move values of the class.
2293 : ///
2294 : /// \param TypeQuals If this constructor is a move constructor, will be set
2295 : /// to the type qualifiers on the referent of the first parameter's type.
2296 : bool isMoveConstructor(unsigned &TypeQuals) const;
2297 :
2298 : /// \brief Determine whether this constructor is a move constructor
2299 : /// (C++0x [class.copy]p3), which can be used to move values of the class.
2300 : bool isMoveConstructor() const {
2301 : unsigned TypeQuals = 0;
2302 : return isMoveConstructor(TypeQuals);
2303 : }
2304 :
2305 : /// \brief Determine whether this is a copy or move constructor.
2306 : ///
2307 : /// \param TypeQuals Will be set to the type qualifiers on the reference
2308 : /// parameter, if in fact this is a copy or move constructor.
2309 : bool isCopyOrMoveConstructor(unsigned &TypeQuals) const;
2310 :
2311 : /// \brief Determine whether this a copy or move constructor.
2312 : bool isCopyOrMoveConstructor() const {
2313 : unsigned Quals;
2314 : return isCopyOrMoveConstructor(Quals);
2315 : }
2316 :
2317 : /// Whether this constructor is a
2318 : /// converting constructor (C++ [class.conv.ctor]), which can be
2319 : /// used for user-defined conversions.
2320 : bool isConvertingConstructor(bool AllowExplicit) const;
2321 :
2322 : /// \brief Determine whether this is a member template specialization that
2323 : /// would copy the object to itself. Such constructors are never used to copy
2324 : /// an object.
2325 : bool isSpecializationCopyingObject() const;
2326 :
2327 : /// \brief Get the constructor that this inheriting constructor is based on.
2328 : const CXXConstructorDecl *getInheritedConstructor() const;
2329 :
2330 : /// \brief Set the constructor that this inheriting constructor is based on.
2331 : void setInheritedConstructor(const CXXConstructorDecl *BaseCtor);
2332 :
2333 : CXXConstructorDecl *getCanonicalDecl() override {
2334 : return cast<CXXConstructorDecl>(FunctionDecl::getCanonicalDecl());
2335 : }
2336 : const CXXConstructorDecl *getCanonicalDecl() const {
2337 : return const_cast<CXXConstructorDecl*>(this)->getCanonicalDecl();
2338 : }
2339 :
2340 : // Implement isa/cast/dyncast/etc.
2341 20 : static bool classof(const Decl *D) { return classofKind(D->getKind()); }
2342 20 : static bool classofKind(Kind K) { return K == CXXConstructor; }
2343 :
2344 : friend class ASTDeclReader;
2345 : friend class ASTDeclWriter;
2346 : };
2347 :
2348 : /// \brief Represents a C++ destructor within a class.
2349 : ///
2350 : /// For example:
2351 : ///
2352 : /// \code
2353 : /// class X {
2354 : /// public:
2355 : /// ~X(); // represented by a CXXDestructorDecl.
2356 : /// };
2357 : /// \endcode
2358 : class CXXDestructorDecl : public CXXMethodDecl {
2359 : void anchor() override;
2360 :
2361 : FunctionDecl *OperatorDelete;
2362 :
2363 : CXXDestructorDecl(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
2364 : const DeclarationNameInfo &NameInfo,
2365 : QualType T, TypeSourceInfo *TInfo,
2366 : bool isInline, bool isImplicitlyDeclared)
2367 : : CXXMethodDecl(CXXDestructor, C, RD, StartLoc, NameInfo, T, TInfo,
2368 : SC_None, isInline, /*isConstexpr=*/false, SourceLocation()),
2369 : OperatorDelete(nullptr) {
2370 : setImplicit(isImplicitlyDeclared);
2371 : }
2372 :
2373 : public:
2374 : static CXXDestructorDecl *Create(ASTContext &C, CXXRecordDecl *RD,
2375 : SourceLocation StartLoc,
2376 : const DeclarationNameInfo &NameInfo,
2377 : QualType T, TypeSourceInfo* TInfo,
2378 : bool isInline,
2379 : bool isImplicitlyDeclared);
2380 : static CXXDestructorDecl *CreateDeserialized(ASTContext & C, unsigned ID);
2381 :
2382 : void setOperatorDelete(FunctionDecl *OD);
2383 : const FunctionDecl *getOperatorDelete() const {
2384 : return cast<CXXDestructorDecl>(getFirstDecl())->OperatorDelete;
2385 : }
2386 :
2387 : // Implement isa/cast/dyncast/etc.
2388 : static bool classof(const Decl *D) { return classofKind(D->getKind()); }
2389 : static bool classofKind(Kind K) { return K == CXXDestructor; }
2390 :
2391 : friend class ASTDeclReader;
2392 : friend class ASTDeclWriter;
2393 : };
2394 :
2395 : /// \brief Represents a C++ conversion function within a class.
2396 : ///
2397 : /// For example:
2398 : ///
2399 : /// \code
2400 : /// class X {
2401 : /// public:
2402 : /// operator bool();
2403 : /// };
2404 : /// \endcode
2405 : class CXXConversionDecl : public CXXMethodDecl {
2406 : void anchor() override;
2407 : /// Whether this conversion function declaration is marked
2408 : /// "explicit", meaning that it can only be applied when the user
2409 : /// explicitly wrote a cast. This is a C++0x feature.
2410 : bool IsExplicitSpecified : 1;
2411 :
2412 : CXXConversionDecl(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
2413 : const DeclarationNameInfo &NameInfo,
2414 : QualType T, TypeSourceInfo *TInfo,
2415 : bool isInline, bool isExplicitSpecified,
2416 : bool isConstexpr, SourceLocation EndLocation)
2417 : : CXXMethodDecl(CXXConversion, C, RD, StartLoc, NameInfo, T, TInfo,
2418 : SC_None, isInline, isConstexpr, EndLocation),
2419 : IsExplicitSpecified(isExplicitSpecified) { }
2420 :
2421 : public:
2422 : static CXXConversionDecl *Create(ASTContext &C, CXXRecordDecl *RD,
2423 : SourceLocation StartLoc,
2424 : const DeclarationNameInfo &NameInfo,
2425 : QualType T, TypeSourceInfo *TInfo,
2426 : bool isInline, bool isExplicit,
2427 : bool isConstexpr,
2428 : SourceLocation EndLocation);
2429 : static CXXConversionDecl *CreateDeserialized(ASTContext &C, unsigned ID);
2430 :
2431 : /// Whether this conversion function declaration is marked
2432 : /// "explicit", meaning that it can only be used for direct initialization
2433 : /// (including explitly written casts). This is a C++11 feature.
2434 : bool isExplicitSpecified() const { return IsExplicitSpecified; }
2435 :
2436 : /// \brief Whether this is an explicit conversion operator (C++11 and later).
2437 : ///
2438 : /// Explicit conversion operators are only considered for direct
2439 : /// initialization, e.g., when the user has explicitly written a cast.
2440 : bool isExplicit() const {
2441 : return cast<CXXConversionDecl>(getFirstDecl())->isExplicitSpecified();
2442 : }
2443 :
2444 : /// \brief Returns the type that this conversion function is converting to.
2445 : QualType getConversionType() const {
2446 : return getType()->getAs<FunctionType>()->getReturnType();
2447 : }
2448 :
2449 : /// \brief Determine whether this conversion function is a conversion from
2450 : /// a lambda closure type to a block pointer.
2451 : bool isLambdaToBlockPointerConversion() const;
2452 :
2453 : // Implement isa/cast/dyncast/etc.
2454 : static bool classof(const Decl *D) { return classofKind(D->getKind()); }
2455 : static bool classofKind(Kind K) { return K == CXXConversion; }
2456 :
2457 : friend class ASTDeclReader;
2458 : friend class ASTDeclWriter;
2459 : };
2460 :
2461 : /// \brief Represents a linkage specification.
2462 : ///
2463 : /// For example:
2464 : /// \code
2465 : /// extern "C" void foo();
2466 : /// \endcode
2467 : class LinkageSpecDecl : public Decl, public DeclContext {
2468 : virtual void anchor();
2469 : public:
2470 : /// \brief Represents the language in a linkage specification.
2471 : ///
2472 : /// The values are part of the serialization ABI for
2473 : /// ASTs and cannot be changed without altering that ABI. To help
2474 : /// ensure a stable ABI for this, we choose the DW_LANG_ encodings
2475 : /// from the dwarf standard.
2476 : enum LanguageIDs {
2477 : lang_c = /* DW_LANG_C */ 0x0002,
2478 : lang_cxx = /* DW_LANG_C_plus_plus */ 0x0004
2479 : };
2480 : private:
2481 : /// \brief The language for this linkage specification.
2482 : unsigned Language : 3;
2483 : /// \brief True if this linkage spec has braces.
2484 : ///
2485 : /// This is needed so that hasBraces() returns the correct result while the
2486 : /// linkage spec body is being parsed. Once RBraceLoc has been set this is
2487 : /// not used, so it doesn't need to be serialized.
2488 : unsigned HasBraces : 1;
2489 : /// \brief The source location for the extern keyword.
2490 : SourceLocation ExternLoc;
2491 : /// \brief The source location for the right brace (if valid).
2492 : SourceLocation RBraceLoc;
2493 :
2494 : LinkageSpecDecl(DeclContext *DC, SourceLocation ExternLoc,
2495 : SourceLocation LangLoc, LanguageIDs lang, bool HasBraces)
2496 : : Decl(LinkageSpec, DC, LangLoc), DeclContext(LinkageSpec),
2497 : Language(lang), HasBraces(HasBraces), ExternLoc(ExternLoc),
2498 : RBraceLoc(SourceLocation()) { }
2499 :
2500 : public:
2501 : static LinkageSpecDecl *Create(ASTContext &C, DeclContext *DC,
2502 : SourceLocation ExternLoc,
2503 : SourceLocation LangLoc, LanguageIDs Lang,
2504 : bool HasBraces);
2505 : static LinkageSpecDecl *CreateDeserialized(ASTContext &C, unsigned ID);
2506 :
2507 : /// \brief Return the language specified by this linkage specification.
2508 : LanguageIDs getLanguage() const { return LanguageIDs(Language); }
2509 : /// \brief Set the language specified by this linkage specification.
2510 : void setLanguage(LanguageIDs L) { Language = L; }
2511 :
2512 : /// \brief Determines whether this linkage specification had braces in
2513 : /// its syntactic form.
2514 : bool hasBraces() const {
2515 : assert(!RBraceLoc.isValid() || HasBraces);
2516 : return HasBraces;
2517 : }
2518 :
2519 : SourceLocation getExternLoc() const { return ExternLoc; }
2520 : SourceLocation getRBraceLoc() const { return RBraceLoc; }
2521 : void setExternLoc(SourceLocation L) { ExternLoc = L; }
2522 : void setRBraceLoc(SourceLocation L) {
2523 : RBraceLoc = L;
2524 : HasBraces = RBraceLoc.isValid();
2525 : }
2526 :
2527 : SourceLocation getLocEnd() const LLVM_READONLY {
2528 : if (hasBraces())
2529 : return getRBraceLoc();
2530 : // No braces: get the end location of the (only) declaration in context
2531 : // (if present).
2532 : return decls_empty() ? getLocation() : decls_begin()->getLocEnd();
2533 : }
2534 :
2535 : SourceRange getSourceRange() const override LLVM_READONLY {
2536 : return SourceRange(ExternLoc, getLocEnd());
2537 : }
2538 :
2539 : static bool classof(const Decl *D) { return classofKind(D->getKind()); }
2540 : static bool classofKind(Kind K) { return K == LinkageSpec; }
2541 : static DeclContext *castToDeclContext(const LinkageSpecDecl *D) {
2542 0 : return static_cast<DeclContext *>(const_cast<LinkageSpecDecl*>(D));
2543 : }
2544 : static LinkageSpecDecl *castFromDeclContext(const DeclContext *DC) {
2545 : return static_cast<LinkageSpecDecl *>(const_cast<DeclContext*>(DC));
2546 : }
2547 : };
2548 :
2549 : /// \brief Represents C++ using-directive.
2550 : ///
2551 : /// For example:
2552 : /// \code
2553 : /// using namespace std;
2554 : /// \endcode
2555 : ///
2556 : /// \note UsingDirectiveDecl should be Decl not NamedDecl, but we provide
2557 : /// artificial names for all using-directives in order to store
2558 : /// them in DeclContext effectively.
2559 : class UsingDirectiveDecl : public NamedDecl {
2560 : void anchor() override;
2561 : /// \brief The location of the \c using keyword.
2562 : SourceLocation UsingLoc;
2563 :
2564 : /// \brief The location of the \c namespace keyword.
2565 : SourceLocation NamespaceLoc;
2566 :
2567 : /// \brief The nested-name-specifier that precedes the namespace.
2568 : NestedNameSpecifierLoc QualifierLoc;
2569 :
2570 : /// \brief The namespace nominated by this using-directive.
2571 : NamedDecl *NominatedNamespace;
2572 :
2573 : /// Enclosing context containing both using-directive and nominated
2574 : /// namespace.
2575 : DeclContext *CommonAncestor;
2576 :
2577 : /// \brief Returns special DeclarationName used by using-directives.
2578 : ///
2579 : /// This is only used by DeclContext for storing UsingDirectiveDecls in
2580 : /// its lookup structure.
2581 : static DeclarationName getName() {
2582 : return DeclarationName::getUsingDirectiveName();
2583 : }
2584 :
2585 : UsingDirectiveDecl(DeclContext *DC, SourceLocation UsingLoc,
2586 : SourceLocation NamespcLoc,
2587 : NestedNameSpecifierLoc QualifierLoc,
2588 : SourceLocation IdentLoc,
2589 : NamedDecl *Nominated,
2590 : DeclContext *CommonAncestor)
2591 : : NamedDecl(UsingDirective, DC, IdentLoc, getName()), UsingLoc(UsingLoc),
2592 : NamespaceLoc(NamespcLoc), QualifierLoc(QualifierLoc),
2593 : NominatedNamespace(Nominated), CommonAncestor(CommonAncestor) { }
2594 :
2595 : public:
2596 : /// \brief Retrieve the nested-name-specifier that qualifies the
2597 : /// name of the namespace, with source-location information.
2598 0 : NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; }
2599 :
2600 : /// \brief Retrieve the nested-name-specifier that qualifies the
2601 : /// name of the namespace.
2602 : NestedNameSpecifier *getQualifier() const {
2603 : return QualifierLoc.getNestedNameSpecifier();
2604 : }
2605 :
2606 : NamedDecl *getNominatedNamespaceAsWritten() { return NominatedNamespace; }
2607 : const NamedDecl *getNominatedNamespaceAsWritten() const {
2608 : return NominatedNamespace;
2609 : }
2610 :
2611 : /// \brief Returns the namespace nominated by this using-directive.
2612 : NamespaceDecl *getNominatedNamespace();
2613 :
2614 : const NamespaceDecl *getNominatedNamespace() const {
2615 : return const_cast<UsingDirectiveDecl*>(this)->getNominatedNamespace();
2616 : }
2617 :
2618 : /// \brief Returns the common ancestor context of this using-directive and
2619 : /// its nominated namespace.
2620 : DeclContext *getCommonAncestor() { return CommonAncestor; }
2621 : const DeclContext *getCommonAncestor() const { return CommonAncestor; }
2622 :
2623 : /// \brief Return the location of the \c using keyword.
2624 : SourceLocation getUsingLoc() const { return UsingLoc; }
2625 :
2626 : // FIXME: Could omit 'Key' in name.
2627 : /// \brief Returns the location of the \c namespace keyword.
2628 : SourceLocation getNamespaceKeyLocation() const { return NamespaceLoc; }
2629 :
2630 : /// \brief Returns the location of this using declaration's identifier.
2631 : SourceLocation getIdentLocation() const { return getLocation(); }
2632 :
2633 : static UsingDirectiveDecl *Create(ASTContext &C, DeclContext *DC,
2634 : SourceLocation UsingLoc,
2635 : SourceLocation NamespaceLoc,
2636 : NestedNameSpecifierLoc QualifierLoc,
2637 : SourceLocation IdentLoc,
2638 : NamedDecl *Nominated,
2639 : DeclContext *CommonAncestor);
2640 : static UsingDirectiveDecl *CreateDeserialized(ASTContext &C, unsigned ID);
2641 :
2642 : SourceRange getSourceRange() const override LLVM_READONLY {
2643 : return SourceRange(UsingLoc, getLocation());
2644 : }
2645 :
2646 : static bool classof(const Decl *D) { return classofKind(D->getKind()); }
2647 : static bool classofKind(Kind K) { return K == UsingDirective; }
2648 :
2649 : // Friend for getUsingDirectiveName.
2650 : friend class DeclContext;
2651 :
2652 : friend class ASTDeclReader;
2653 : };
2654 :
2655 : /// \brief Represents a C++ namespace alias.
2656 : ///
2657 : /// For example:
2658 : ///
2659 : /// \code
2660 : /// namespace Foo = Bar;
2661 : /// \endcode
2662 : class NamespaceAliasDecl : public NamedDecl,
2663 : public Redeclarable<NamespaceAliasDecl> {
2664 : void anchor() override;
2665 :
2666 : /// \brief The location of the \c namespace keyword.
2667 : SourceLocation NamespaceLoc;
2668 :
2669 : /// \brief The location of the namespace's identifier.
2670 : ///
2671 : /// This is accessed by TargetNameLoc.
2672 : SourceLocation IdentLoc;
2673 :
2674 : /// \brief The nested-name-specifier that precedes the namespace.
2675 : NestedNameSpecifierLoc QualifierLoc;
2676 :
2677 : /// \brief The Decl that this alias points to, either a NamespaceDecl or
2678 : /// a NamespaceAliasDecl.
2679 : NamedDecl *Namespace;
2680 :
2681 : NamespaceAliasDecl(ASTContext &C, DeclContext *DC,
2682 : SourceLocation NamespaceLoc, SourceLocation AliasLoc,
2683 : IdentifierInfo *Alias, NestedNameSpecifierLoc QualifierLoc,
2684 : SourceLocation IdentLoc, NamedDecl *Namespace)
2685 : : NamedDecl(NamespaceAlias, DC, AliasLoc, Alias), redeclarable_base(C),
2686 : NamespaceLoc(NamespaceLoc), IdentLoc(IdentLoc),
2687 : QualifierLoc(QualifierLoc), Namespace(Namespace) {}
2688 :
2689 : typedef Redeclarable<NamespaceAliasDecl> redeclarable_base;
2690 : NamespaceAliasDecl *getNextRedeclarationImpl() override;
2691 : NamespaceAliasDecl *getPreviousDeclImpl() override;
2692 : NamespaceAliasDecl *getMostRecentDeclImpl() override;
2693 :
2694 : friend class ASTDeclReader;
2695 :
2696 : public:
2697 : static NamespaceAliasDecl *Create(ASTContext &C, DeclContext *DC,
2698 : SourceLocation NamespaceLoc,
2699 : SourceLocation AliasLoc,
2700 : IdentifierInfo *Alias,
2701 : NestedNameSpecifierLoc QualifierLoc,
2702 : SourceLocation IdentLoc,
2703 : NamedDecl *Namespace);
2704 :
2705 : static NamespaceAliasDecl *CreateDeserialized(ASTContext &C, unsigned ID);
2706 :
2707 : typedef redeclarable_base::redecl_range redecl_range;
2708 : typedef redeclarable_base::redecl_iterator redecl_iterator;
2709 : using redeclarable_base::redecls_begin;
2710 : using redeclarable_base::redecls_end;
2711 : using redeclarable_base::redecls;
2712 : using redeclarable_base::getPreviousDecl;
2713 : using redeclarable_base::getMostRecentDecl;
2714 :
2715 : NamespaceAliasDecl *getCanonicalDecl() override {
2716 : return getFirstDecl();
2717 : }
2718 : const NamespaceAliasDecl *getCanonicalDecl() const {
2719 : return getFirstDecl();
2720 : }
2721 :
2722 : /// \brief Retrieve the nested-name-specifier that qualifies the
2723 : /// name of the namespace, with source-location information.
2724 : NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; }
2725 :
2726 : /// \brief Retrieve the nested-name-specifier that qualifies the
2727 : /// name of the namespace.
2728 : NestedNameSpecifier *getQualifier() const {
2729 : return QualifierLoc.getNestedNameSpecifier();
2730 : }
2731 :
2732 : /// \brief Retrieve the namespace declaration aliased by this directive.
2733 : NamespaceDecl *getNamespace() {
2734 : if (NamespaceAliasDecl *AD = dyn_cast<NamespaceAliasDecl>(Namespace))
2735 : return AD->getNamespace();
2736 :
2737 : return cast<NamespaceDecl>(Namespace);
2738 : }
2739 :
2740 : const NamespaceDecl *getNamespace() const {
2741 : return const_cast<NamespaceAliasDecl*>(this)->getNamespace();
2742 : }
2743 :
2744 : /// Returns the location of the alias name, i.e. 'foo' in
2745 : /// "namespace foo = ns::bar;".
2746 : SourceLocation getAliasLoc() const { return getLocation(); }
2747 :
2748 : /// Returns the location of the \c namespace keyword.
2749 : SourceLocation getNamespaceLoc() const { return NamespaceLoc; }
2750 :
2751 : /// Returns the location of the identifier in the named namespace.
2752 : SourceLocation getTargetNameLoc() const { return IdentLoc; }
2753 :
2754 : /// \brief Retrieve the namespace that this alias refers to, which
2755 : /// may either be a NamespaceDecl or a NamespaceAliasDecl.
2756 : NamedDecl *getAliasedNamespace() const { return Namespace; }
2757 :
2758 : SourceRange getSourceRange() const override LLVM_READONLY {
2759 : return SourceRange(NamespaceLoc, IdentLoc);
2760 : }
2761 :
2762 : static bool classof(const Decl *D) { return classofKind(D->getKind()); }
2763 : static bool classofKind(Kind K) { return K == NamespaceAlias; }
2764 : };
2765 :
2766 : /// \brief Represents a shadow declaration introduced into a scope by a
2767 : /// (resolved) using declaration.
2768 : ///
2769 : /// For example,
2770 : /// \code
2771 : /// namespace A {
2772 : /// void foo();
2773 : /// }
2774 : /// namespace B {
2775 : /// using A::foo; // <- a UsingDecl
2776 : /// // Also creates a UsingShadowDecl for A::foo() in B
2777 : /// }
2778 : /// \endcode
2779 : class UsingShadowDecl : public NamedDecl, public Redeclarable<UsingShadowDecl> {
2780 : void anchor() override;
2781 :
2782 : /// The referenced declaration.
2783 : NamedDecl *Underlying;
2784 :
2785 : /// \brief The using declaration which introduced this decl or the next using
2786 : /// shadow declaration contained in the aforementioned using declaration.
2787 : NamedDecl *UsingOrNextShadow;
2788 : friend class UsingDecl;
2789 :
2790 : UsingShadowDecl(ASTContext &C, DeclContext *DC, SourceLocation Loc,
2791 : UsingDecl *Using, NamedDecl *Target)
2792 : : NamedDecl(UsingShadow, DC, Loc, DeclarationName()),
2793 : redeclarable_base(C), Underlying(Target),
2794 : UsingOrNextShadow(reinterpret_cast<NamedDecl *>(Using)) {
2795 : if (Target) {
2796 : setDeclName(Target->getDeclName());
2797 : IdentifierNamespace = Target->getIdentifierNamespace();
2798 : }
2799 : setImplicit();
2800 : }
2801 :
2802 : typedef Redeclarable<UsingShadowDecl> redeclarable_base;
2803 : UsingShadowDecl *getNextRedeclarationImpl() override {
2804 : return getNextRedeclaration();
2805 : }
2806 : UsingShadowDecl *getPreviousDeclImpl() override {
2807 : return getPreviousDecl();
2808 : }
2809 : UsingShadowDecl *getMostRecentDeclImpl() override {
2810 : return getMostRecentDecl();
2811 : }
2812 :
2813 : public:
2814 : static UsingShadowDecl *Create(ASTContext &C, DeclContext *DC,
2815 : SourceLocation Loc, UsingDecl *Using,
2816 : NamedDecl *Target) {
2817 : return new (C, DC) UsingShadowDecl(C, DC, Loc, Using, Target);
2818 : }
2819 :
2820 : static UsingShadowDecl *CreateDeserialized(ASTContext &C, unsigned ID);
2821 :
2822 : typedef redeclarable_base::redecl_range redecl_range;
2823 : typedef redeclarable_base::redecl_iterator redecl_iterator;
2824 : using redeclarable_base::redecls_begin;
2825 : using redeclarable_base::redecls_end;
2826 : using redeclarable_base::redecls;
2827 : using redeclarable_base::getPreviousDecl;
2828 : using redeclarable_base::getMostRecentDecl;
2829 :
2830 : UsingShadowDecl *getCanonicalDecl() override {
2831 : return getFirstDecl();
2832 : }
2833 : const UsingShadowDecl *getCanonicalDecl() const {
2834 : return getFirstDecl();
2835 : }
2836 :
2837 : /// \brief Gets the underlying declaration which has been brought into the
2838 : /// local scope.
2839 : NamedDecl *getTargetDecl() const { return Underlying; }
2840 :
2841 : /// \brief Sets the underlying declaration which has been brought into the
2842 : /// local scope.
2843 : void setTargetDecl(NamedDecl* ND) {
2844 : assert(ND && "Target decl is null!");
2845 : Underlying = ND;
2846 : IdentifierNamespace = ND->getIdentifierNamespace();
2847 : }
2848 :
2849 : /// \brief Gets the using declaration to which this declaration is tied.
2850 : UsingDecl *getUsingDecl() const;
2851 :
2852 : /// \brief The next using shadow declaration contained in the shadow decl
2853 : /// chain of the using declaration which introduced this decl.
2854 : UsingShadowDecl *getNextUsingShadowDecl() const {
2855 : return dyn_cast_or_null<UsingShadowDecl>(UsingOrNextShadow);
2856 : }
2857 :
2858 : static bool classof(const Decl *D) { return classofKind(D->getKind()); }
2859 : static bool classofKind(Kind K) { return K == Decl::UsingShadow; }
2860 :
2861 : friend class ASTDeclReader;
2862 : friend class ASTDeclWriter;
2863 : };
2864 :
2865 : /// \brief Represents a C++ using-declaration.
2866 : ///
2867 : /// For example:
2868 : /// \code
2869 : /// using someNameSpace::someIdentifier;
2870 : /// \endcode
2871 : class UsingDecl : public NamedDecl, public Mergeable<UsingDecl> {
2872 : void anchor() override;
2873 :
2874 : /// \brief The source location of the 'using' keyword itself.
2875 : SourceLocation UsingLocation;
2876 :
2877 : /// \brief The nested-name-specifier that precedes the name.
2878 : NestedNameSpecifierLoc QualifierLoc;
2879 :
2880 : /// \brief Provides source/type location info for the declaration name
2881 : /// embedded in the ValueDecl base class.
2882 : DeclarationNameLoc DNLoc;
2883 :
2884 : /// \brief The first shadow declaration of the shadow decl chain associated
2885 : /// with this using declaration.
2886 : ///
2887 : /// The bool member of the pair store whether this decl has the \c typename
2888 : /// keyword.
2889 : llvm::PointerIntPair<UsingShadowDecl *, 1, bool> FirstUsingShadow;
2890 :
2891 : UsingDecl(DeclContext *DC, SourceLocation UL,
2892 : NestedNameSpecifierLoc QualifierLoc,
2893 : const DeclarationNameInfo &NameInfo, bool HasTypenameKeyword)
2894 : : NamedDecl(Using, DC, NameInfo.getLoc(), NameInfo.getName()),
2895 : UsingLocation(UL), QualifierLoc(QualifierLoc),
2896 : DNLoc(NameInfo.getInfo()), FirstUsingShadow(nullptr, HasTypenameKeyword) {
2897 : }
2898 :
2899 : public:
2900 : /// \brief Return the source location of the 'using' keyword.
2901 : SourceLocation getUsingLoc() const { return UsingLocation; }
2902 :
2903 : /// \brief Set the source location of the 'using' keyword.
2904 : void setUsingLoc(SourceLocation L) { UsingLocation = L; }
2905 :
2906 : /// \brief Retrieve the nested-name-specifier that qualifies the name,
2907 : /// with source-location information.
2908 0 : NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; }
2909 :
2910 : /// \brief Retrieve the nested-name-specifier that qualifies the name.
2911 : NestedNameSpecifier *getQualifier() const {
2912 : return QualifierLoc.getNestedNameSpecifier();
2913 : }
2914 :
2915 : DeclarationNameInfo getNameInfo() const {
2916 0 : return DeclarationNameInfo(getDeclName(), getLocation(), DNLoc);
2917 : }
2918 :
2919 : /// \brief Return true if it is a C++03 access declaration (no 'using').
2920 : bool isAccessDeclaration() const { return UsingLocation.isInvalid(); }
2921 :
2922 : /// \brief Return true if the using declaration has 'typename'.
2923 : bool hasTypename() const { return FirstUsingShadow.getInt(); }
2924 :
2925 : /// \brief Sets whether the using declaration has 'typename'.
2926 : void setTypename(bool TN) { FirstUsingShadow.setInt(TN); }
2927 :
2928 : /// \brief Iterates through the using shadow declarations associated with
2929 : /// this using declaration.
2930 : class shadow_iterator {
2931 : /// \brief The current using shadow declaration.
2932 : UsingShadowDecl *Current;
2933 :
2934 : public:
2935 : typedef UsingShadowDecl* value_type;
2936 : typedef UsingShadowDecl* reference;
2937 : typedef UsingShadowDecl* pointer;
2938 : typedef std::forward_iterator_tag iterator_category;
2939 : typedef std::ptrdiff_t difference_type;
2940 :
2941 : shadow_iterator() : Current(nullptr) { }
2942 : explicit shadow_iterator(UsingShadowDecl *C) : Current(C) { }
2943 :
2944 : reference operator*() const { return Current; }
2945 : pointer operator->() const { return Current; }
2946 :
2947 : shadow_iterator& operator++() {
2948 : Current = Current->getNextUsingShadowDecl();
2949 : return *this;
2950 : }
2951 :
2952 : shadow_iterator operator++(int) {
2953 : shadow_iterator tmp(*this);
2954 : ++(*this);
2955 : return tmp;
2956 : }
2957 :
2958 : friend bool operator==(shadow_iterator x, shadow_iterator y) {
2959 : return x.Current == y.Current;
2960 : }
2961 : friend bool operator!=(shadow_iterator x, shadow_iterator y) {
2962 : return x.Current != y.Current;
2963 : }
2964 : };
2965 :
2966 : typedef llvm::iterator_range<shadow_iterator> shadow_range;
2967 :
2968 : shadow_range shadows() const {
2969 : return shadow_range(shadow_begin(), shadow_end());
2970 : }
2971 : shadow_iterator shadow_begin() const {
2972 : return shadow_iterator(FirstUsingShadow.getPointer());
2973 : }
2974 : shadow_iterator shadow_end() const { return shadow_iterator(); }
2975 :
2976 : /// \brief Return the number of shadowed declarations associated with this
2977 : /// using declaration.
2978 : unsigned shadow_size() const {
2979 : return std::distance(shadow_begin(), shadow_end());
2980 : }
2981 :
2982 : void addShadowDecl(UsingShadowDecl *S);
2983 : void removeShadowDecl(UsingShadowDecl *S);
2984 :
2985 : static UsingDecl *Create(ASTContext &C, DeclContext *DC,
2986 : SourceLocation UsingL,
2987 : NestedNameSpecifierLoc QualifierLoc,
2988 : const DeclarationNameInfo &NameInfo,
2989 : bool HasTypenameKeyword);
2990 :
2991 : static UsingDecl *CreateDeserialized(ASTContext &C, unsigned ID);
2992 :
2993 : SourceRange getSourceRange() const override LLVM_READONLY;
2994 :
2995 : /// Retrieves the canonical declaration of this declaration.
2996 : UsingDecl *getCanonicalDecl() override { return getFirstDecl(); }
2997 : const UsingDecl *getCanonicalDecl() const { return getFirstDecl(); }
2998 :
2999 : static bool classof(const Decl *D) { return classofKind(D->getKind()); }
3000 : static bool classofKind(Kind K) { return K == Using; }
3001 :
3002 : friend class ASTDeclReader;
3003 : friend class ASTDeclWriter;
3004 : };
3005 :
3006 : /// \brief Represents a dependent using declaration which was not marked with
3007 : /// \c typename.
3008 : ///
3009 : /// Unlike non-dependent using declarations, these *only* bring through
3010 : /// non-types; otherwise they would break two-phase lookup.
3011 : ///
3012 : /// \code
3013 : /// template \<class T> class A : public Base<T> {
3014 : /// using Base<T>::foo;
3015 : /// };
3016 : /// \endcode
3017 : class UnresolvedUsingValueDecl : public ValueDecl,
3018 : public Mergeable<UnresolvedUsingValueDecl> {
3019 : void anchor() override;
3020 :
3021 : /// \brief The source location of the 'using' keyword
3022 : SourceLocation UsingLocation;
3023 :
3024 : /// \brief The nested-name-specifier that precedes the name.
3025 : NestedNameSpecifierLoc QualifierLoc;
3026 :
3027 : /// \brief Provides source/type location info for the declaration name
3028 : /// embedded in the ValueDecl base class.
3029 : DeclarationNameLoc DNLoc;
3030 :
3031 : UnresolvedUsingValueDecl(DeclContext *DC, QualType Ty,
3032 : SourceLocation UsingLoc,
3033 : NestedNameSpecifierLoc QualifierLoc,
3034 : const DeclarationNameInfo &NameInfo)
3035 : : ValueDecl(UnresolvedUsingValue, DC,
3036 : NameInfo.getLoc(), NameInfo.getName(), Ty),
3037 : UsingLocation(UsingLoc), QualifierLoc(QualifierLoc),
3038 : DNLoc(NameInfo.getInfo())
3039 : { }
3040 :
3041 : public:
3042 : /// \brief Returns the source location of the 'using' keyword.
3043 : SourceLocation getUsingLoc() const { return UsingLocation; }
3044 :
3045 : /// \brief Set the source location of the 'using' keyword.
3046 : void setUsingLoc(SourceLocation L) { UsingLocation = L; }
3047 :
3048 : /// \brief Return true if it is a C++03 access declaration (no 'using').
3049 : bool isAccessDeclaration() const { return UsingLocation.isInvalid(); }
3050 :
3051 : /// \brief Retrieve the nested-name-specifier that qualifies the name,
3052 : /// with source-location information.
3053 0 : NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; }
3054 :
3055 : /// \brief Retrieve the nested-name-specifier that qualifies the name.
3056 : NestedNameSpecifier *getQualifier() const {
3057 : return QualifierLoc.getNestedNameSpecifier();
3058 : }
3059 :
3060 : DeclarationNameInfo getNameInfo() const {
3061 0 : return DeclarationNameInfo(getDeclName(), getLocation(), DNLoc);
3062 : }
3063 :
3064 : static UnresolvedUsingValueDecl *
3065 : Create(ASTContext &C, DeclContext *DC, SourceLocation UsingLoc,
3066 : NestedNameSpecifierLoc QualifierLoc,
3067 : const DeclarationNameInfo &NameInfo);
3068 :
3069 : static UnresolvedUsingValueDecl *
3070 : CreateDeserialized(ASTContext &C, unsigned ID);
3071 :
3072 : SourceRange getSourceRange() const override LLVM_READONLY;
3073 :
3074 : /// Retrieves the canonical declaration of this declaration.
3075 : UnresolvedUsingValueDecl *getCanonicalDecl() override {
3076 : return getFirstDecl();
3077 : }
3078 : const UnresolvedUsingValueDecl *getCanonicalDecl() const {
3079 : return getFirstDecl();
3080 : }
3081 :
3082 : static bool classof(const Decl *D) { return classofKind(D->getKind()); }
3083 : static bool classofKind(Kind K) { return K == UnresolvedUsingValue; }
3084 :
3085 : friend class ASTDeclReader;
3086 : friend class ASTDeclWriter;
3087 : };
3088 :
3089 : /// \brief Represents a dependent using declaration which was marked with
3090 : /// \c typename.
3091 : ///
3092 : /// \code
3093 : /// template \<class T> class A : public Base<T> {
3094 : /// using typename Base<T>::foo;
3095 : /// };
3096 : /// \endcode
3097 : ///
3098 : /// The type associated with an unresolved using typename decl is
3099 : /// currently always a typename type.
3100 : class UnresolvedUsingTypenameDecl
3101 : : public TypeDecl,
3102 : public Mergeable<UnresolvedUsingTypenameDecl> {
3103 : void anchor() override;
3104 :
3105 : /// \brief The source location of the 'typename' keyword
3106 : SourceLocation TypenameLocation;
3107 :
3108 : /// \brief The nested-name-specifier that precedes the name.
3109 : NestedNameSpecifierLoc QualifierLoc;
3110 :
3111 : UnresolvedUsingTypenameDecl(DeclContext *DC, SourceLocation UsingLoc,
3112 : SourceLocation TypenameLoc,
3113 : NestedNameSpecifierLoc QualifierLoc,
3114 : SourceLocation TargetNameLoc,
3115 : IdentifierInfo *TargetName)
3116 : : TypeDecl(UnresolvedUsingTypename, DC, TargetNameLoc, TargetName,
3117 : UsingLoc),
3118 : TypenameLocation(TypenameLoc), QualifierLoc(QualifierLoc) { }
3119 :
3120 : friend class ASTDeclReader;
3121 :
3122 : public:
3123 : /// \brief Returns the source location of the 'using' keyword.
3124 : SourceLocation getUsingLoc() const { return getLocStart(); }
3125 :
3126 : /// \brief Returns the source location of the 'typename' keyword.
3127 : SourceLocation getTypenameLoc() const { return TypenameLocation; }
3128 :
3129 : /// \brief Retrieve the nested-name-specifier that qualifies the name,
3130 : /// with source-location information.
3131 0 : NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; }
3132 :
3133 : /// \brief Retrieve the nested-name-specifier that qualifies the name.
3134 : NestedNameSpecifier *getQualifier() const {
3135 : return QualifierLoc.getNestedNameSpecifier();
3136 : }
3137 :
3138 : static UnresolvedUsingTypenameDecl *
3139 : Create(ASTContext &C, DeclContext *DC, SourceLocation UsingLoc,
3140 : SourceLocation TypenameLoc, NestedNameSpecifierLoc QualifierLoc,
3141 : SourceLocation TargetNameLoc, DeclarationName TargetName);
3142 :
3143 : static UnresolvedUsingTypenameDecl *
3144 : CreateDeserialized(ASTContext &C, unsigned ID);
3145 :
3146 : /// Retrieves the canonical declaration of this declaration.
3147 : UnresolvedUsingTypenameDecl *getCanonicalDecl() override {
3148 : return getFirstDecl();
3149 : }
3150 : const UnresolvedUsingTypenameDecl *getCanonicalDecl() const {
3151 : return getFirstDecl();
3152 : }
3153 :
3154 : static bool classof(const Decl *D) { return classofKind(D->getKind()); }
3155 : static bool classofKind(Kind K) { return K == UnresolvedUsingTypename; }
3156 : };
3157 :
3158 : /// \brief Represents a C++11 static_assert declaration.
3159 : class StaticAssertDecl : public Decl {
3160 : virtual void anchor();
3161 : llvm::PointerIntPair<Expr *, 1, bool> AssertExprAndFailed;
3162 : StringLiteral *Message;
3163 : SourceLocation RParenLoc;
3164 :
3165 : StaticAssertDecl(DeclContext *DC, SourceLocation StaticAssertLoc,
3166 : Expr *AssertExpr, StringLiteral *Message,
3167 : SourceLocation RParenLoc, bool Failed)
3168 : : Decl(StaticAssert, DC, StaticAssertLoc),
3169 : AssertExprAndFailed(AssertExpr, Failed), Message(Message),
3170 : RParenLoc(RParenLoc) { }
3171 :
3172 : public:
3173 : static StaticAssertDecl *Create(ASTContext &C, DeclContext *DC,
3174 : SourceLocation StaticAssertLoc,
3175 : Expr *AssertExpr, StringLiteral *Message,
3176 : SourceLocation RParenLoc, bool Failed);
3177 : static StaticAssertDecl *CreateDeserialized(ASTContext &C, unsigned ID);
3178 :
3179 0 : Expr *getAssertExpr() { return AssertExprAndFailed.getPointer(); }
3180 : const Expr *getAssertExpr() const { return AssertExprAndFailed.getPointer(); }
3181 :
3182 0 : StringLiteral *getMessage() { return Message; }
3183 : const StringLiteral *getMessage() const { return Message; }
3184 :
3185 : bool isFailed() const { return AssertExprAndFailed.getInt(); }
3186 :
3187 : SourceLocation getRParenLoc() const { return RParenLoc; }
3188 :
3189 : SourceRange getSourceRange() const override LLVM_READONLY {
3190 : return SourceRange(getLocation(), getRParenLoc());
3191 : }
3192 :
3193 : static bool classof(const Decl *D) { return classofKind(D->getKind()); }
3194 : static bool classofKind(Kind K) { return K == StaticAssert; }
3195 :
3196 : friend class ASTDeclReader;
3197 : };
3198 :
3199 : /// An instance of this class represents the declaration of a property
3200 : /// member. This is a Microsoft extension to C++, first introduced in
3201 : /// Visual Studio .NET 2003 as a parallel to similar features in C#
3202 : /// and Managed C++.
3203 : ///
3204 : /// A property must always be a non-static class member.
3205 : ///
3206 : /// A property member superficially resembles a non-static data
3207 : /// member, except preceded by a property attribute:
3208 : /// __declspec(property(get=GetX, put=PutX)) int x;
3209 : /// Either (but not both) of the 'get' and 'put' names may be omitted.
3210 : ///
3211 : /// A reference to a property is always an lvalue. If the lvalue
3212 : /// undergoes lvalue-to-rvalue conversion, then a getter name is
3213 : /// required, and that member is called with no arguments.
3214 : /// If the lvalue is assigned into, then a setter name is required,
3215 : /// and that member is called with one argument, the value assigned.
3216 : /// Both operations are potentially overloaded. Compound assignments
3217 : /// are permitted, as are the increment and decrement operators.
3218 : ///
3219 : /// The getter and putter methods are permitted to be overloaded,
3220 : /// although their return and parameter types are subject to certain
3221 : /// restrictions according to the type of the property.
3222 : ///
3223 : /// A property declared using an incomplete array type may
3224 : /// additionally be subscripted, adding extra parameters to the getter
3225 : /// and putter methods.
3226 : class MSPropertyDecl : public DeclaratorDecl {
3227 : IdentifierInfo *GetterId, *SetterId;
3228 :
3229 : MSPropertyDecl(DeclContext *DC, SourceLocation L, DeclarationName N,
3230 : QualType T, TypeSourceInfo *TInfo, SourceLocation StartL,
3231 : IdentifierInfo *Getter, IdentifierInfo *Setter)
3232 : : DeclaratorDecl(MSProperty, DC, L, N, T, TInfo, StartL),
3233 : GetterId(Getter), SetterId(Setter) {}
3234 :
3235 : public:
3236 : static MSPropertyDecl *Create(ASTContext &C, DeclContext *DC,
3237 : SourceLocation L, DeclarationName N, QualType T,
3238 : TypeSourceInfo *TInfo, SourceLocation StartL,
3239 : IdentifierInfo *Getter, IdentifierInfo *Setter);
3240 : static MSPropertyDecl *CreateDeserialized(ASTContext &C, unsigned ID);
3241 :
3242 : static bool classof(const Decl *D) { return D->getKind() == MSProperty; }
3243 :
3244 : bool hasGetter() const { return GetterId != nullptr; }
3245 : IdentifierInfo* getGetterId() const { return GetterId; }
3246 : bool hasSetter() const { return SetterId != nullptr; }
3247 : IdentifierInfo* getSetterId() const { return SetterId; }
3248 :
3249 : friend class ASTDeclReader;
3250 : };
3251 :
3252 : /// Insertion operator for diagnostics. This allows sending an AccessSpecifier
3253 : /// into a diagnostic with <<.
3254 : const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB,
3255 : AccessSpecifier AS);
3256 :
3257 : const PartialDiagnostic &operator<<(const PartialDiagnostic &DB,
3258 : AccessSpecifier AS);
3259 :
3260 : } // end namespace clang
3261 :
3262 : #endif
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