Bug Summary

File:tools/clang/lib/AST/DeclCXX.cpp
Warning:line 2569, column 11
Called C++ object pointer is null

Annotated Source Code

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clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name DeclCXX.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mthread-model posix -mframe-pointer=none -relaxed-aliasing -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-10/lib/clang/10.0.0 -D CLANG_VENDOR="Debian " -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-10~svn373517/build-llvm/tools/clang/lib/AST -I /build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST -I /build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include -I /build/llvm-toolchain-snapshot-10~svn373517/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-10~svn373517/build-llvm/include -I /build/llvm-toolchain-snapshot-10~svn373517/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/backward -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-10/lib/clang/10.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-10~svn373517/build-llvm/tools/clang/lib/AST -fdebug-prefix-map=/build/llvm-toolchain-snapshot-10~svn373517=. -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -stack-protector 2 -fobjc-runtime=gcc -fno-common -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -o /tmp/scan-build-2019-10-02-234743-9763-1 -x c++ /build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp

/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp

1//===- DeclCXX.cpp - C++ Declaration AST Node Implementation --------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file implements the C++ related Decl classes.
10//
11//===----------------------------------------------------------------------===//
12
13#include "clang/AST/DeclCXX.h"
14#include "clang/AST/ASTContext.h"
15#include "clang/AST/ASTLambda.h"
16#include "clang/AST/ASTMutationListener.h"
17#include "clang/AST/ASTUnresolvedSet.h"
18#include "clang/AST/CXXInheritance.h"
19#include "clang/AST/DeclBase.h"
20#include "clang/AST/DeclTemplate.h"
21#include "clang/AST/DeclarationName.h"
22#include "clang/AST/Expr.h"
23#include "clang/AST/ExprCXX.h"
24#include "clang/AST/LambdaCapture.h"
25#include "clang/AST/NestedNameSpecifier.h"
26#include "clang/AST/ODRHash.h"
27#include "clang/AST/Type.h"
28#include "clang/AST/TypeLoc.h"
29#include "clang/AST/UnresolvedSet.h"
30#include "clang/Basic/Diagnostic.h"
31#include "clang/Basic/IdentifierTable.h"
32#include "clang/Basic/LLVM.h"
33#include "clang/Basic/LangOptions.h"
34#include "clang/Basic/OperatorKinds.h"
35#include "clang/Basic/PartialDiagnostic.h"
36#include "clang/Basic/SourceLocation.h"
37#include "clang/Basic/Specifiers.h"
38#include "llvm/ADT/None.h"
39#include "llvm/ADT/SmallPtrSet.h"
40#include "llvm/ADT/SmallVector.h"
41#include "llvm/ADT/iterator_range.h"
42#include "llvm/Support/Casting.h"
43#include "llvm/Support/ErrorHandling.h"
44#include "llvm/Support/raw_ostream.h"
45#include <algorithm>
46#include <cassert>
47#include <cstddef>
48#include <cstdint>
49
50using namespace clang;
51
52//===----------------------------------------------------------------------===//
53// Decl Allocation/Deallocation Method Implementations
54//===----------------------------------------------------------------------===//
55
56void AccessSpecDecl::anchor() {}
57
58AccessSpecDecl *AccessSpecDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
59 return new (C, ID) AccessSpecDecl(EmptyShell());
60}
61
62void LazyASTUnresolvedSet::getFromExternalSource(ASTContext &C) const {
63 ExternalASTSource *Source = C.getExternalSource();
64 assert(Impl.Decls.isLazy() && "getFromExternalSource for non-lazy set")((Impl.Decls.isLazy() && "getFromExternalSource for non-lazy set"
) ? static_cast<void> (0) : __assert_fail ("Impl.Decls.isLazy() && \"getFromExternalSource for non-lazy set\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 64, __PRETTY_FUNCTION__))
;
65 assert(Source && "getFromExternalSource with no external source")((Source && "getFromExternalSource with no external source"
) ? static_cast<void> (0) : __assert_fail ("Source && \"getFromExternalSource with no external source\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 65, __PRETTY_FUNCTION__))
;
66
67 for (ASTUnresolvedSet::iterator I = Impl.begin(); I != Impl.end(); ++I)
68 I.setDecl(cast<NamedDecl>(Source->GetExternalDecl(
69 reinterpret_cast<uintptr_t>(I.getDecl()) >> 2)));
70 Impl.Decls.setLazy(false);
71}
72
73CXXRecordDecl::DefinitionData::DefinitionData(CXXRecordDecl *D)
74 : UserDeclaredConstructor(false), UserDeclaredSpecialMembers(0),
75 Aggregate(true), PlainOldData(true), Empty(true), Polymorphic(false),
76 Abstract(false), IsStandardLayout(true), IsCXX11StandardLayout(true),
77 HasBasesWithFields(false), HasBasesWithNonStaticDataMembers(false),
78 HasPrivateFields(false), HasProtectedFields(false),
79 HasPublicFields(false), HasMutableFields(false), HasVariantMembers(false),
80 HasOnlyCMembers(true), HasInClassInitializer(false),
81 HasUninitializedReferenceMember(false), HasUninitializedFields(false),
82 HasInheritedConstructor(false), HasInheritedAssignment(false),
83 NeedOverloadResolutionForCopyConstructor(false),
84 NeedOverloadResolutionForMoveConstructor(false),
85 NeedOverloadResolutionForMoveAssignment(false),
86 NeedOverloadResolutionForDestructor(false),
87 DefaultedCopyConstructorIsDeleted(false),
88 DefaultedMoveConstructorIsDeleted(false),
89 DefaultedMoveAssignmentIsDeleted(false),
90 DefaultedDestructorIsDeleted(false), HasTrivialSpecialMembers(SMF_All),
91 HasTrivialSpecialMembersForCall(SMF_All),
92 DeclaredNonTrivialSpecialMembers(0),
93 DeclaredNonTrivialSpecialMembersForCall(0), HasIrrelevantDestructor(true),
94 HasConstexprNonCopyMoveConstructor(false),
95 HasDefaultedDefaultConstructor(false),
96 DefaultedDefaultConstructorIsConstexpr(true),
97 HasConstexprDefaultConstructor(false),
98 DefaultedDestructorIsConstexpr(true),
99 HasNonLiteralTypeFieldsOrBases(false), ComputedVisibleConversions(false),
100 UserProvidedDefaultConstructor(false), DeclaredSpecialMembers(0),
101 ImplicitCopyConstructorCanHaveConstParamForVBase(true),
102 ImplicitCopyConstructorCanHaveConstParamForNonVBase(true),
103 ImplicitCopyAssignmentHasConstParam(true),
104 HasDeclaredCopyConstructorWithConstParam(false),
105 HasDeclaredCopyAssignmentWithConstParam(false), IsLambda(false),
106 IsParsingBaseSpecifiers(false), HasODRHash(false), Definition(D) {}
107
108CXXBaseSpecifier *CXXRecordDecl::DefinitionData::getBasesSlowCase() const {
109 return Bases.get(Definition->getASTContext().getExternalSource());
110}
111
112CXXBaseSpecifier *CXXRecordDecl::DefinitionData::getVBasesSlowCase() const {
113 return VBases.get(Definition->getASTContext().getExternalSource());
114}
115
116CXXRecordDecl::CXXRecordDecl(Kind K, TagKind TK, const ASTContext &C,
117 DeclContext *DC, SourceLocation StartLoc,
118 SourceLocation IdLoc, IdentifierInfo *Id,
119 CXXRecordDecl *PrevDecl)
120 : RecordDecl(K, TK, C, DC, StartLoc, IdLoc, Id, PrevDecl),
121 DefinitionData(PrevDecl ? PrevDecl->DefinitionData
122 : nullptr) {}
123
124CXXRecordDecl *CXXRecordDecl::Create(const ASTContext &C, TagKind TK,
125 DeclContext *DC, SourceLocation StartLoc,
126 SourceLocation IdLoc, IdentifierInfo *Id,
127 CXXRecordDecl *PrevDecl,
128 bool DelayTypeCreation) {
129 auto *R = new (C, DC) CXXRecordDecl(CXXRecord, TK, C, DC, StartLoc, IdLoc, Id,
130 PrevDecl);
131 R->setMayHaveOutOfDateDef(C.getLangOpts().Modules);
132
133 // FIXME: DelayTypeCreation seems like such a hack
134 if (!DelayTypeCreation)
135 C.getTypeDeclType(R, PrevDecl);
136 return R;
137}
138
139CXXRecordDecl *
140CXXRecordDecl::CreateLambda(const ASTContext &C, DeclContext *DC,
141 TypeSourceInfo *Info, SourceLocation Loc,
142 bool Dependent, bool IsGeneric,
143 LambdaCaptureDefault CaptureDefault) {
144 auto *R = new (C, DC) CXXRecordDecl(CXXRecord, TTK_Class, C, DC, Loc, Loc,
145 nullptr, nullptr);
146 R->setBeingDefined(true);
147 R->DefinitionData =
148 new (C) struct LambdaDefinitionData(R, Info, Dependent, IsGeneric,
149 CaptureDefault);
150 R->setMayHaveOutOfDateDef(false);
151 R->setImplicit(true);
152 C.getTypeDeclType(R, /*PrevDecl=*/nullptr);
153 return R;
154}
155
156CXXRecordDecl *
157CXXRecordDecl::CreateDeserialized(const ASTContext &C, unsigned ID) {
158 auto *R = new (C, ID) CXXRecordDecl(
159 CXXRecord, TTK_Struct, C, nullptr, SourceLocation(), SourceLocation(),
160 nullptr, nullptr);
161 R->setMayHaveOutOfDateDef(false);
162 return R;
163}
164
165/// Determine whether a class has a repeated base class. This is intended for
166/// use when determining if a class is standard-layout, so makes no attempt to
167/// handle virtual bases.
168static bool hasRepeatedBaseClass(const CXXRecordDecl *StartRD) {
169 llvm::SmallPtrSet<const CXXRecordDecl*, 8> SeenBaseTypes;
170 SmallVector<const CXXRecordDecl*, 8> WorkList = {StartRD};
171 while (!WorkList.empty()) {
172 const CXXRecordDecl *RD = WorkList.pop_back_val();
173 for (const CXXBaseSpecifier &BaseSpec : RD->bases()) {
174 if (const CXXRecordDecl *B = BaseSpec.getType()->getAsCXXRecordDecl()) {
175 if (!SeenBaseTypes.insert(B).second)
176 return true;
177 WorkList.push_back(B);
178 }
179 }
180 }
181 return false;
182}
183
184void
185CXXRecordDecl::setBases(CXXBaseSpecifier const * const *Bases,
186 unsigned NumBases) {
187 ASTContext &C = getASTContext();
188
189 if (!data().Bases.isOffset() && data().NumBases > 0)
190 C.Deallocate(data().getBases());
191
192 if (NumBases) {
193 if (!C.getLangOpts().CPlusPlus17) {
194 // C++ [dcl.init.aggr]p1:
195 // An aggregate is [...] a class with [...] no base classes [...].
196 data().Aggregate = false;
197 }
198
199 // C++ [class]p4:
200 // A POD-struct is an aggregate class...
201 data().PlainOldData = false;
202 }
203
204 // The set of seen virtual base types.
205 llvm::SmallPtrSet<CanQualType, 8> SeenVBaseTypes;
206
207 // The virtual bases of this class.
208 SmallVector<const CXXBaseSpecifier *, 8> VBases;
209
210 data().Bases = new(C) CXXBaseSpecifier [NumBases];
211 data().NumBases = NumBases;
212 for (unsigned i = 0; i < NumBases; ++i) {
213 data().getBases()[i] = *Bases[i];
214 // Keep track of inherited vbases for this base class.
215 const CXXBaseSpecifier *Base = Bases[i];
216 QualType BaseType = Base->getType();
217 // Skip dependent types; we can't do any checking on them now.
218 if (BaseType->isDependentType())
219 continue;
220 auto *BaseClassDecl =
221 cast<CXXRecordDecl>(BaseType->getAs<RecordType>()->getDecl());
222
223 // C++2a [class]p7:
224 // A standard-layout class is a class that:
225 // [...]
226 // -- has all non-static data members and bit-fields in the class and
227 // its base classes first declared in the same class
228 if (BaseClassDecl->data().HasBasesWithFields ||
229 !BaseClassDecl->field_empty()) {
230 if (data().HasBasesWithFields)
231 // Two bases have members or bit-fields: not standard-layout.
232 data().IsStandardLayout = false;
233 data().HasBasesWithFields = true;
234 }
235
236 // C++11 [class]p7:
237 // A standard-layout class is a class that:
238 // -- [...] has [...] at most one base class with non-static data
239 // members
240 if (BaseClassDecl->data().HasBasesWithNonStaticDataMembers ||
241 BaseClassDecl->hasDirectFields()) {
242 if (data().HasBasesWithNonStaticDataMembers)
243 data().IsCXX11StandardLayout = false;
244 data().HasBasesWithNonStaticDataMembers = true;
245 }
246
247 if (!BaseClassDecl->isEmpty()) {
248 // C++14 [meta.unary.prop]p4:
249 // T is a class type [...] with [...] no base class B for which
250 // is_empty<B>::value is false.
251 data().Empty = false;
252 }
253
254 // C++1z [dcl.init.agg]p1:
255 // An aggregate is a class with [...] no private or protected base classes
256 if (Base->getAccessSpecifier() != AS_public)
257 data().Aggregate = false;
258
259 // C++ [class.virtual]p1:
260 // A class that declares or inherits a virtual function is called a
261 // polymorphic class.
262 if (BaseClassDecl->isPolymorphic()) {
263 data().Polymorphic = true;
264
265 // An aggregate is a class with [...] no virtual functions.
266 data().Aggregate = false;
267 }
268
269 // C++0x [class]p7:
270 // A standard-layout class is a class that: [...]
271 // -- has no non-standard-layout base classes
272 if (!BaseClassDecl->isStandardLayout())
273 data().IsStandardLayout = false;
274 if (!BaseClassDecl->isCXX11StandardLayout())
275 data().IsCXX11StandardLayout = false;
276
277 // Record if this base is the first non-literal field or base.
278 if (!hasNonLiteralTypeFieldsOrBases() && !BaseType->isLiteralType(C))
279 data().HasNonLiteralTypeFieldsOrBases = true;
280
281 // Now go through all virtual bases of this base and add them.
282 for (const auto &VBase : BaseClassDecl->vbases()) {
283 // Add this base if it's not already in the list.
284 if (SeenVBaseTypes.insert(C.getCanonicalType(VBase.getType())).second) {
285 VBases.push_back(&VBase);
286
287 // C++11 [class.copy]p8:
288 // The implicitly-declared copy constructor for a class X will have
289 // the form 'X::X(const X&)' if each [...] virtual base class B of X
290 // has a copy constructor whose first parameter is of type
291 // 'const B&' or 'const volatile B&' [...]
292 if (CXXRecordDecl *VBaseDecl = VBase.getType()->getAsCXXRecordDecl())
293 if (!VBaseDecl->hasCopyConstructorWithConstParam())
294 data().ImplicitCopyConstructorCanHaveConstParamForVBase = false;
295
296 // C++1z [dcl.init.agg]p1:
297 // An aggregate is a class with [...] no virtual base classes
298 data().Aggregate = false;
299 }
300 }
301
302 if (Base->isVirtual()) {
303 // Add this base if it's not already in the list.
304 if (SeenVBaseTypes.insert(C.getCanonicalType(BaseType)).second)
305 VBases.push_back(Base);
306
307 // C++14 [meta.unary.prop] is_empty:
308 // T is a class type, but not a union type, with ... no virtual base
309 // classes
310 data().Empty = false;
311
312 // C++1z [dcl.init.agg]p1:
313 // An aggregate is a class with [...] no virtual base classes
314 data().Aggregate = false;
315
316 // C++11 [class.ctor]p5, C++11 [class.copy]p12, C++11 [class.copy]p25:
317 // A [default constructor, copy/move constructor, or copy/move assignment
318 // operator for a class X] is trivial [...] if:
319 // -- class X has [...] no virtual base classes
320 data().HasTrivialSpecialMembers &= SMF_Destructor;
321 data().HasTrivialSpecialMembersForCall &= SMF_Destructor;
322
323 // C++0x [class]p7:
324 // A standard-layout class is a class that: [...]
325 // -- has [...] no virtual base classes
326 data().IsStandardLayout = false;
327 data().IsCXX11StandardLayout = false;
328
329 // C++20 [dcl.constexpr]p3:
330 // In the definition of a constexpr function [...]
331 // -- if the function is a constructor or destructor,
332 // its class shall not have any virtual base classes
333 data().DefaultedDefaultConstructorIsConstexpr = false;
334 data().DefaultedDestructorIsConstexpr = false;
335
336 // C++1z [class.copy]p8:
337 // The implicitly-declared copy constructor for a class X will have
338 // the form 'X::X(const X&)' if each potentially constructed subobject
339 // has a copy constructor whose first parameter is of type
340 // 'const B&' or 'const volatile B&' [...]
341 if (!BaseClassDecl->hasCopyConstructorWithConstParam())
342 data().ImplicitCopyConstructorCanHaveConstParamForVBase = false;
343 } else {
344 // C++ [class.ctor]p5:
345 // A default constructor is trivial [...] if:
346 // -- all the direct base classes of its class have trivial default
347 // constructors.
348 if (!BaseClassDecl->hasTrivialDefaultConstructor())
349 data().HasTrivialSpecialMembers &= ~SMF_DefaultConstructor;
350
351 // C++0x [class.copy]p13:
352 // A copy/move constructor for class X is trivial if [...]
353 // [...]
354 // -- the constructor selected to copy/move each direct base class
355 // subobject is trivial, and
356 if (!BaseClassDecl->hasTrivialCopyConstructor())
357 data().HasTrivialSpecialMembers &= ~SMF_CopyConstructor;
358
359 if (!BaseClassDecl->hasTrivialCopyConstructorForCall())
360 data().HasTrivialSpecialMembersForCall &= ~SMF_CopyConstructor;
361
362 // If the base class doesn't have a simple move constructor, we'll eagerly
363 // declare it and perform overload resolution to determine which function
364 // it actually calls. If it does have a simple move constructor, this
365 // check is correct.
366 if (!BaseClassDecl->hasTrivialMoveConstructor())
367 data().HasTrivialSpecialMembers &= ~SMF_MoveConstructor;
368
369 if (!BaseClassDecl->hasTrivialMoveConstructorForCall())
370 data().HasTrivialSpecialMembersForCall &= ~SMF_MoveConstructor;
371
372 // C++0x [class.copy]p27:
373 // A copy/move assignment operator for class X is trivial if [...]
374 // [...]
375 // -- the assignment operator selected to copy/move each direct base
376 // class subobject is trivial, and
377 if (!BaseClassDecl->hasTrivialCopyAssignment())
378 data().HasTrivialSpecialMembers &= ~SMF_CopyAssignment;
379 // If the base class doesn't have a simple move assignment, we'll eagerly
380 // declare it and perform overload resolution to determine which function
381 // it actually calls. If it does have a simple move assignment, this
382 // check is correct.
383 if (!BaseClassDecl->hasTrivialMoveAssignment())
384 data().HasTrivialSpecialMembers &= ~SMF_MoveAssignment;
385
386 // C++11 [class.ctor]p6:
387 // If that user-written default constructor would satisfy the
388 // requirements of a constexpr constructor, the implicitly-defined
389 // default constructor is constexpr.
390 if (!BaseClassDecl->hasConstexprDefaultConstructor())
391 data().DefaultedDefaultConstructorIsConstexpr = false;
392
393 // C++1z [class.copy]p8:
394 // The implicitly-declared copy constructor for a class X will have
395 // the form 'X::X(const X&)' if each potentially constructed subobject
396 // has a copy constructor whose first parameter is of type
397 // 'const B&' or 'const volatile B&' [...]
398 if (!BaseClassDecl->hasCopyConstructorWithConstParam())
399 data().ImplicitCopyConstructorCanHaveConstParamForNonVBase = false;
400 }
401
402 // C++ [class.ctor]p3:
403 // A destructor is trivial if all the direct base classes of its class
404 // have trivial destructors.
405 if (!BaseClassDecl->hasTrivialDestructor())
406 data().HasTrivialSpecialMembers &= ~SMF_Destructor;
407
408 if (!BaseClassDecl->hasTrivialDestructorForCall())
409 data().HasTrivialSpecialMembersForCall &= ~SMF_Destructor;
410
411 if (!BaseClassDecl->hasIrrelevantDestructor())
412 data().HasIrrelevantDestructor = false;
413
414 // C++11 [class.copy]p18:
415 // The implicitly-declared copy assignment oeprator for a class X will
416 // have the form 'X& X::operator=(const X&)' if each direct base class B
417 // of X has a copy assignment operator whose parameter is of type 'const
418 // B&', 'const volatile B&', or 'B' [...]
419 if (!BaseClassDecl->hasCopyAssignmentWithConstParam())
420 data().ImplicitCopyAssignmentHasConstParam = false;
421
422 // A class has an Objective-C object member if... or any of its bases
423 // has an Objective-C object member.
424 if (BaseClassDecl->hasObjectMember())
425 setHasObjectMember(true);
426
427 if (BaseClassDecl->hasVolatileMember())
428 setHasVolatileMember(true);
429
430 if (BaseClassDecl->getArgPassingRestrictions() ==
431 RecordDecl::APK_CanNeverPassInRegs)
432 setArgPassingRestrictions(RecordDecl::APK_CanNeverPassInRegs);
433
434 // Keep track of the presence of mutable fields.
435 if (BaseClassDecl->hasMutableFields()) {
436 data().HasMutableFields = true;
437 data().NeedOverloadResolutionForCopyConstructor = true;
438 }
439
440 if (BaseClassDecl->hasUninitializedReferenceMember())
441 data().HasUninitializedReferenceMember = true;
442
443 if (!BaseClassDecl->allowConstDefaultInit())
444 data().HasUninitializedFields = true;
445
446 addedClassSubobject(BaseClassDecl);
447 }
448
449 // C++2a [class]p7:
450 // A class S is a standard-layout class if it:
451 // -- has at most one base class subobject of any given type
452 //
453 // Note that we only need to check this for classes with more than one base
454 // class. If there's only one base class, and it's standard layout, then
455 // we know there are no repeated base classes.
456 if (data().IsStandardLayout && NumBases > 1 && hasRepeatedBaseClass(this))
457 data().IsStandardLayout = false;
458
459 if (VBases.empty()) {
460 data().IsParsingBaseSpecifiers = false;
461 return;
462 }
463
464 // Create base specifier for any direct or indirect virtual bases.
465 data().VBases = new (C) CXXBaseSpecifier[VBases.size()];
466 data().NumVBases = VBases.size();
467 for (int I = 0, E = VBases.size(); I != E; ++I) {
468 QualType Type = VBases[I]->getType();
469 if (!Type->isDependentType())
470 addedClassSubobject(Type->getAsCXXRecordDecl());
471 data().getVBases()[I] = *VBases[I];
472 }
473
474 data().IsParsingBaseSpecifiers = false;
475}
476
477unsigned CXXRecordDecl::getODRHash() const {
478 assert(hasDefinition() && "ODRHash only for records with definitions")((hasDefinition() && "ODRHash only for records with definitions"
) ? static_cast<void> (0) : __assert_fail ("hasDefinition() && \"ODRHash only for records with definitions\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 478, __PRETTY_FUNCTION__))
;
479
480 // Previously calculated hash is stored in DefinitionData.
481 if (DefinitionData->HasODRHash)
482 return DefinitionData->ODRHash;
483
484 // Only calculate hash on first call of getODRHash per record.
485 ODRHash Hash;
486 Hash.AddCXXRecordDecl(getDefinition());
487 DefinitionData->HasODRHash = true;
488 DefinitionData->ODRHash = Hash.CalculateHash();
489
490 return DefinitionData->ODRHash;
491}
492
493void CXXRecordDecl::addedClassSubobject(CXXRecordDecl *Subobj) {
494 // C++11 [class.copy]p11:
495 // A defaulted copy/move constructor for a class X is defined as
496 // deleted if X has:
497 // -- a direct or virtual base class B that cannot be copied/moved [...]
498 // -- a non-static data member of class type M (or array thereof)
499 // that cannot be copied or moved [...]
500 if (!Subobj->hasSimpleCopyConstructor())
501 data().NeedOverloadResolutionForCopyConstructor = true;
502 if (!Subobj->hasSimpleMoveConstructor())
503 data().NeedOverloadResolutionForMoveConstructor = true;
504
505 // C++11 [class.copy]p23:
506 // A defaulted copy/move assignment operator for a class X is defined as
507 // deleted if X has:
508 // -- a direct or virtual base class B that cannot be copied/moved [...]
509 // -- a non-static data member of class type M (or array thereof)
510 // that cannot be copied or moved [...]
511 if (!Subobj->hasSimpleMoveAssignment())
512 data().NeedOverloadResolutionForMoveAssignment = true;
513
514 // C++11 [class.ctor]p5, C++11 [class.copy]p11, C++11 [class.dtor]p5:
515 // A defaulted [ctor or dtor] for a class X is defined as
516 // deleted if X has:
517 // -- any direct or virtual base class [...] has a type with a destructor
518 // that is deleted or inaccessible from the defaulted [ctor or dtor].
519 // -- any non-static data member has a type with a destructor
520 // that is deleted or inaccessible from the defaulted [ctor or dtor].
521 if (!Subobj->hasSimpleDestructor()) {
522 data().NeedOverloadResolutionForCopyConstructor = true;
523 data().NeedOverloadResolutionForMoveConstructor = true;
524 data().NeedOverloadResolutionForDestructor = true;
525 }
526
527 // C++2a [dcl.constexpr]p4:
528 // The definition of a constexpr destructor [shall] satisfy the
529 // following requirement:
530 // -- for every subobject of class type or (possibly multi-dimensional)
531 // array thereof, that class type shall have a constexpr destructor
532 if (!Subobj->hasConstexprDestructor())
533 data().DefaultedDestructorIsConstexpr = false;
534}
535
536bool CXXRecordDecl::hasConstexprDestructor() const {
537 auto *Dtor = getDestructor();
538 return Dtor ? Dtor->isConstexpr() : defaultedDestructorIsConstexpr();
539}
540
541bool CXXRecordDecl::hasAnyDependentBases() const {
542 if (!isDependentContext())
543 return false;
544
545 return !forallBases([](const CXXRecordDecl *) { return true; });
546}
547
548bool CXXRecordDecl::isTriviallyCopyable() const {
549 // C++0x [class]p5:
550 // A trivially copyable class is a class that:
551 // -- has no non-trivial copy constructors,
552 if (hasNonTrivialCopyConstructor()) return false;
553 // -- has no non-trivial move constructors,
554 if (hasNonTrivialMoveConstructor()) return false;
555 // -- has no non-trivial copy assignment operators,
556 if (hasNonTrivialCopyAssignment()) return false;
557 // -- has no non-trivial move assignment operators, and
558 if (hasNonTrivialMoveAssignment()) return false;
559 // -- has a trivial destructor.
560 if (!hasTrivialDestructor()) return false;
561
562 return true;
563}
564
565void CXXRecordDecl::markedVirtualFunctionPure() {
566 // C++ [class.abstract]p2:
567 // A class is abstract if it has at least one pure virtual function.
568 data().Abstract = true;
569}
570
571bool CXXRecordDecl::hasSubobjectAtOffsetZeroOfEmptyBaseType(
572 ASTContext &Ctx, const CXXRecordDecl *XFirst) {
573 if (!getNumBases())
574 return false;
575
576 llvm::SmallPtrSet<const CXXRecordDecl*, 8> Bases;
577 llvm::SmallPtrSet<const CXXRecordDecl*, 8> M;
578 SmallVector<const CXXRecordDecl*, 8> WorkList;
579
580 // Visit a type that we have determined is an element of M(S).
581 auto Visit = [&](const CXXRecordDecl *RD) -> bool {
582 RD = RD->getCanonicalDecl();
583
584 // C++2a [class]p8:
585 // A class S is a standard-layout class if it [...] has no element of the
586 // set M(S) of types as a base class.
587 //
588 // If we find a subobject of an empty type, it might also be a base class,
589 // so we'll need to walk the base classes to check.
590 if (!RD->data().HasBasesWithFields) {
591 // Walk the bases the first time, stopping if we find the type. Build a
592 // set of them so we don't need to walk them again.
593 if (Bases.empty()) {
594 bool RDIsBase = !forallBases([&](const CXXRecordDecl *Base) -> bool {
595 Base = Base->getCanonicalDecl();
596 if (RD == Base)
597 return false;
598 Bases.insert(Base);
599 return true;
600 });
601 if (RDIsBase)
602 return true;
603 } else {
604 if (Bases.count(RD))
605 return true;
606 }
607 }
608
609 if (M.insert(RD).second)
610 WorkList.push_back(RD);
611 return false;
612 };
613
614 if (Visit(XFirst))
615 return true;
616
617 while (!WorkList.empty()) {
618 const CXXRecordDecl *X = WorkList.pop_back_val();
619
620 // FIXME: We don't check the bases of X. That matches the standard, but
621 // that sure looks like a wording bug.
622
623 // -- If X is a non-union class type with a non-static data member
624 // [recurse to each field] that is either of zero size or is the
625 // first non-static data member of X
626 // -- If X is a union type, [recurse to union members]
627 bool IsFirstField = true;
628 for (auto *FD : X->fields()) {
629 // FIXME: Should we really care about the type of the first non-static
630 // data member of a non-union if there are preceding unnamed bit-fields?
631 if (FD->isUnnamedBitfield())
632 continue;
633
634 if (!IsFirstField && !FD->isZeroSize(Ctx))
635 continue;
636
637 // -- If X is n array type, [visit the element type]
638 QualType T = Ctx.getBaseElementType(FD->getType());
639 if (auto *RD = T->getAsCXXRecordDecl())
640 if (Visit(RD))
641 return true;
642
643 if (!X->isUnion())
644 IsFirstField = false;
645 }
646 }
647
648 return false;
649}
650
651bool CXXRecordDecl::lambdaIsDefaultConstructibleAndAssignable() const {
652 assert(isLambda() && "not a lambda")((isLambda() && "not a lambda") ? static_cast<void
> (0) : __assert_fail ("isLambda() && \"not a lambda\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 652, __PRETTY_FUNCTION__))
;
653
654 // C++2a [expr.prim.lambda.capture]p11:
655 // The closure type associated with a lambda-expression has no default
656 // constructor if the lambda-expression has a lambda-capture and a
657 // defaulted default constructor otherwise. It has a deleted copy
658 // assignment operator if the lambda-expression has a lambda-capture and
659 // defaulted copy and move assignment operators otherwise.
660 //
661 // C++17 [expr.prim.lambda]p21:
662 // The closure type associated with a lambda-expression has no default
663 // constructor and a deleted copy assignment operator.
664 if (getLambdaCaptureDefault() != LCD_None ||
665 getLambdaData().NumCaptures != 0)
666 return false;
667 return getASTContext().getLangOpts().CPlusPlus2a;
668}
669
670void CXXRecordDecl::addedMember(Decl *D) {
671 if (!D->isImplicit() &&
672 !isa<FieldDecl>(D) &&
673 !isa<IndirectFieldDecl>(D) &&
674 (!isa<TagDecl>(D) || cast<TagDecl>(D)->getTagKind() == TTK_Class ||
675 cast<TagDecl>(D)->getTagKind() == TTK_Interface))
676 data().HasOnlyCMembers = false;
677
678 // Ignore friends and invalid declarations.
679 if (D->getFriendObjectKind() || D->isInvalidDecl())
680 return;
681
682 auto *FunTmpl = dyn_cast<FunctionTemplateDecl>(D);
683 if (FunTmpl)
684 D = FunTmpl->getTemplatedDecl();
685
686 // FIXME: Pass NamedDecl* to addedMember?
687 Decl *DUnderlying = D;
688 if (auto *ND = dyn_cast<NamedDecl>(DUnderlying)) {
689 DUnderlying = ND->getUnderlyingDecl();
690 if (auto *UnderlyingFunTmpl = dyn_cast<FunctionTemplateDecl>(DUnderlying))
691 DUnderlying = UnderlyingFunTmpl->getTemplatedDecl();
692 }
693
694 if (const auto *Method = dyn_cast<CXXMethodDecl>(D)) {
695 if (Method->isVirtual()) {
696 // C++ [dcl.init.aggr]p1:
697 // An aggregate is an array or a class with [...] no virtual functions.
698 data().Aggregate = false;
699
700 // C++ [class]p4:
701 // A POD-struct is an aggregate class...
702 data().PlainOldData = false;
703
704 // C++14 [meta.unary.prop]p4:
705 // T is a class type [...] with [...] no virtual member functions...
706 data().Empty = false;
707
708 // C++ [class.virtual]p1:
709 // A class that declares or inherits a virtual function is called a
710 // polymorphic class.
711 data().Polymorphic = true;
712
713 // C++11 [class.ctor]p5, C++11 [class.copy]p12, C++11 [class.copy]p25:
714 // A [default constructor, copy/move constructor, or copy/move
715 // assignment operator for a class X] is trivial [...] if:
716 // -- class X has no virtual functions [...]
717 data().HasTrivialSpecialMembers &= SMF_Destructor;
718 data().HasTrivialSpecialMembersForCall &= SMF_Destructor;
719
720 // C++0x [class]p7:
721 // A standard-layout class is a class that: [...]
722 // -- has no virtual functions
723 data().IsStandardLayout = false;
724 data().IsCXX11StandardLayout = false;
725 }
726 }
727
728 // Notify the listener if an implicit member was added after the definition
729 // was completed.
730 if (!isBeingDefined() && D->isImplicit())
731 if (ASTMutationListener *L = getASTMutationListener())
732 L->AddedCXXImplicitMember(data().Definition, D);
733
734 // The kind of special member this declaration is, if any.
735 unsigned SMKind = 0;
736
737 // Handle constructors.
738 if (const auto *Constructor = dyn_cast<CXXConstructorDecl>(D)) {
739 if (!Constructor->isImplicit()) {
740 // Note that we have a user-declared constructor.
741 data().UserDeclaredConstructor = true;
742
743 // C++ [class]p4:
744 // A POD-struct is an aggregate class [...]
745 // Since the POD bit is meant to be C++03 POD-ness, clear it even if the
746 // type is technically an aggregate in C++0x since it wouldn't be in 03.
747 data().PlainOldData = false;
748 }
749
750 if (Constructor->isDefaultConstructor()) {
751 SMKind |= SMF_DefaultConstructor;
752
753 if (Constructor->isUserProvided())
754 data().UserProvidedDefaultConstructor = true;
755 if (Constructor->isConstexpr())
756 data().HasConstexprDefaultConstructor = true;
757 if (Constructor->isDefaulted())
758 data().HasDefaultedDefaultConstructor = true;
759 }
760
761 if (!FunTmpl) {
762 unsigned Quals;
763 if (Constructor->isCopyConstructor(Quals)) {
764 SMKind |= SMF_CopyConstructor;
765
766 if (Quals & Qualifiers::Const)
767 data().HasDeclaredCopyConstructorWithConstParam = true;
768 } else if (Constructor->isMoveConstructor())
769 SMKind |= SMF_MoveConstructor;
770 }
771
772 // C++11 [dcl.init.aggr]p1: DR1518
773 // An aggregate is an array or a class with no user-provided [or]
774 // explicit [...] constructors
775 // C++20 [dcl.init.aggr]p1:
776 // An aggregate is an array or a class with no user-declared [...]
777 // constructors
778 if (getASTContext().getLangOpts().CPlusPlus2a
779 ? !Constructor->isImplicit()
780 : (Constructor->isUserProvided() || Constructor->isExplicit()))
781 data().Aggregate = false;
782 }
783
784 // Handle constructors, including those inherited from base classes.
785 if (const auto *Constructor = dyn_cast<CXXConstructorDecl>(DUnderlying)) {
786 // Record if we see any constexpr constructors which are neither copy
787 // nor move constructors.
788 // C++1z [basic.types]p10:
789 // [...] has at least one constexpr constructor or constructor template
790 // (possibly inherited from a base class) that is not a copy or move
791 // constructor [...]
792 if (Constructor->isConstexpr() && !Constructor->isCopyOrMoveConstructor())
793 data().HasConstexprNonCopyMoveConstructor = true;
794 }
795
796 // Handle destructors.
797 if (const auto *DD = dyn_cast<CXXDestructorDecl>(D)) {
798 SMKind |= SMF_Destructor;
799
800 if (DD->isUserProvided())
801 data().HasIrrelevantDestructor = false;
802 // If the destructor is explicitly defaulted and not trivial or not public
803 // or if the destructor is deleted, we clear HasIrrelevantDestructor in
804 // finishedDefaultedOrDeletedMember.
805
806 // C++11 [class.dtor]p5:
807 // A destructor is trivial if [...] the destructor is not virtual.
808 if (DD->isVirtual()) {
809 data().HasTrivialSpecialMembers &= ~SMF_Destructor;
810 data().HasTrivialSpecialMembersForCall &= ~SMF_Destructor;
811 }
812 }
813
814 // Handle member functions.
815 if (const auto *Method = dyn_cast<CXXMethodDecl>(D)) {
816 if (Method->isCopyAssignmentOperator()) {
817 SMKind |= SMF_CopyAssignment;
818
819 const auto *ParamTy =
820 Method->getParamDecl(0)->getType()->getAs<ReferenceType>();
821 if (!ParamTy || ParamTy->getPointeeType().isConstQualified())
822 data().HasDeclaredCopyAssignmentWithConstParam = true;
823 }
824
825 if (Method->isMoveAssignmentOperator())
826 SMKind |= SMF_MoveAssignment;
827
828 // Keep the list of conversion functions up-to-date.
829 if (auto *Conversion = dyn_cast<CXXConversionDecl>(D)) {
830 // FIXME: We use the 'unsafe' accessor for the access specifier here,
831 // because Sema may not have set it yet. That's really just a misdesign
832 // in Sema. However, LLDB *will* have set the access specifier correctly,
833 // and adds declarations after the class is technically completed,
834 // so completeDefinition()'s overriding of the access specifiers doesn't
835 // work.
836 AccessSpecifier AS = Conversion->getAccessUnsafe();
837
838 if (Conversion->getPrimaryTemplate()) {
839 // We don't record specializations.
840 } else {
841 ASTContext &Ctx = getASTContext();
842 ASTUnresolvedSet &Conversions = data().Conversions.get(Ctx);
843 NamedDecl *Primary =
844 FunTmpl ? cast<NamedDecl>(FunTmpl) : cast<NamedDecl>(Conversion);
845 if (Primary->getPreviousDecl())
846 Conversions.replace(cast<NamedDecl>(Primary->getPreviousDecl()),
847 Primary, AS);
848 else
849 Conversions.addDecl(Ctx, Primary, AS);
850 }
851 }
852
853 if (SMKind) {
854 // If this is the first declaration of a special member, we no longer have
855 // an implicit trivial special member.
856 data().HasTrivialSpecialMembers &=
857 data().DeclaredSpecialMembers | ~SMKind;
858 data().HasTrivialSpecialMembersForCall &=
859 data().DeclaredSpecialMembers | ~SMKind;
860
861 if (!Method->isImplicit() && !Method->isUserProvided()) {
862 // This method is user-declared but not user-provided. We can't work out
863 // whether it's trivial yet (not until we get to the end of the class).
864 // We'll handle this method in finishedDefaultedOrDeletedMember.
865 } else if (Method->isTrivial()) {
866 data().HasTrivialSpecialMembers |= SMKind;
867 data().HasTrivialSpecialMembersForCall |= SMKind;
868 } else if (Method->isTrivialForCall()) {
869 data().HasTrivialSpecialMembersForCall |= SMKind;
870 data().DeclaredNonTrivialSpecialMembers |= SMKind;
871 } else {
872 data().DeclaredNonTrivialSpecialMembers |= SMKind;
873 // If this is a user-provided function, do not set
874 // DeclaredNonTrivialSpecialMembersForCall here since we don't know
875 // yet whether the method would be considered non-trivial for the
876 // purpose of calls (attribute "trivial_abi" can be dropped from the
877 // class later, which can change the special method's triviality).
878 if (!Method->isUserProvided())
879 data().DeclaredNonTrivialSpecialMembersForCall |= SMKind;
880 }
881
882 // Note when we have declared a declared special member, and suppress the
883 // implicit declaration of this special member.
884 data().DeclaredSpecialMembers |= SMKind;
885
886 if (!Method->isImplicit()) {
887 data().UserDeclaredSpecialMembers |= SMKind;
888
889 // C++03 [class]p4:
890 // A POD-struct is an aggregate class that has [...] no user-defined
891 // copy assignment operator and no user-defined destructor.
892 //
893 // Since the POD bit is meant to be C++03 POD-ness, and in C++03,
894 // aggregates could not have any constructors, clear it even for an
895 // explicitly defaulted or deleted constructor.
896 // type is technically an aggregate in C++0x since it wouldn't be in 03.
897 //
898 // Also, a user-declared move assignment operator makes a class non-POD.
899 // This is an extension in C++03.
900 data().PlainOldData = false;
901 }
902 }
903
904 return;
905 }
906
907 // Handle non-static data members.
908 if (const auto *Field = dyn_cast<FieldDecl>(D)) {
909 ASTContext &Context = getASTContext();
910
911 // C++2a [class]p7:
912 // A standard-layout class is a class that:
913 // [...]
914 // -- has all non-static data members and bit-fields in the class and
915 // its base classes first declared in the same class
916 if (data().HasBasesWithFields)
917 data().IsStandardLayout = false;
918
919 // C++ [class.bit]p2:
920 // A declaration for a bit-field that omits the identifier declares an
921 // unnamed bit-field. Unnamed bit-fields are not members and cannot be
922 // initialized.
923 if (Field->isUnnamedBitfield()) {
924 // C++ [meta.unary.prop]p4: [LWG2358]
925 // T is a class type [...] with [...] no unnamed bit-fields of non-zero
926 // length
927 if (data().Empty && !Field->isZeroLengthBitField(Context) &&
928 Context.getLangOpts().getClangABICompat() >
929 LangOptions::ClangABI::Ver6)
930 data().Empty = false;
931 return;
932 }
933
934 // C++11 [class]p7:
935 // A standard-layout class is a class that:
936 // -- either has no non-static data members in the most derived class
937 // [...] or has no base classes with non-static data members
938 if (data().HasBasesWithNonStaticDataMembers)
939 data().IsCXX11StandardLayout = false;
940
941 // C++ [dcl.init.aggr]p1:
942 // An aggregate is an array or a class (clause 9) with [...] no
943 // private or protected non-static data members (clause 11).
944 //
945 // A POD must be an aggregate.
946 if (D->getAccess() == AS_private || D->getAccess() == AS_protected) {
947 data().Aggregate = false;
948 data().PlainOldData = false;
949 }
950
951 // Track whether this is the first field. We use this when checking
952 // whether the class is standard-layout below.
953 bool IsFirstField = !data().HasPrivateFields &&
954 !data().HasProtectedFields && !data().HasPublicFields;
955
956 // C++0x [class]p7:
957 // A standard-layout class is a class that:
958 // [...]
959 // -- has the same access control for all non-static data members,
960 switch (D->getAccess()) {
961 case AS_private: data().HasPrivateFields = true; break;
962 case AS_protected: data().HasProtectedFields = true; break;
963 case AS_public: data().HasPublicFields = true; break;
964 case AS_none: llvm_unreachable("Invalid access specifier")::llvm::llvm_unreachable_internal("Invalid access specifier",
"/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 964)
;
965 };
966 if ((data().HasPrivateFields + data().HasProtectedFields +
967 data().HasPublicFields) > 1) {
968 data().IsStandardLayout = false;
969 data().IsCXX11StandardLayout = false;
970 }
971
972 // Keep track of the presence of mutable fields.
973 if (Field->isMutable()) {
974 data().HasMutableFields = true;
975 data().NeedOverloadResolutionForCopyConstructor = true;
976 }
977
978 // C++11 [class.union]p8, DR1460:
979 // If X is a union, a non-static data member of X that is not an anonymous
980 // union is a variant member of X.
981 if (isUnion() && !Field->isAnonymousStructOrUnion())
982 data().HasVariantMembers = true;
983
984 // C++0x [class]p9:
985 // A POD struct is a class that is both a trivial class and a
986 // standard-layout class, and has no non-static data members of type
987 // non-POD struct, non-POD union (or array of such types).
988 //
989 // Automatic Reference Counting: the presence of a member of Objective-C pointer type
990 // that does not explicitly have no lifetime makes the class a non-POD.
991 QualType T = Context.getBaseElementType(Field->getType());
992 if (T->isObjCRetainableType() || T.isObjCGCStrong()) {
993 if (T.hasNonTrivialObjCLifetime()) {
994 // Objective-C Automatic Reference Counting:
995 // If a class has a non-static data member of Objective-C pointer
996 // type (or array thereof), it is a non-POD type and its
997 // default constructor (if any), copy constructor, move constructor,
998 // copy assignment operator, move assignment operator, and destructor are
999 // non-trivial.
1000 setHasObjectMember(true);
1001 struct DefinitionData &Data = data();
1002 Data.PlainOldData = false;
1003 Data.HasTrivialSpecialMembers = 0;
1004
1005 // __strong or __weak fields do not make special functions non-trivial
1006 // for the purpose of calls.
1007 Qualifiers::ObjCLifetime LT = T.getQualifiers().getObjCLifetime();
1008 if (LT != Qualifiers::OCL_Strong && LT != Qualifiers::OCL_Weak)
1009 data().HasTrivialSpecialMembersForCall = 0;
1010
1011 // Structs with __weak fields should never be passed directly.
1012 if (LT == Qualifiers::OCL_Weak)
1013 setArgPassingRestrictions(RecordDecl::APK_CanNeverPassInRegs);
1014
1015 Data.HasIrrelevantDestructor = false;
1016
1017 if (isUnion()) {
1018 data().DefaultedCopyConstructorIsDeleted = true;
1019 data().DefaultedMoveConstructorIsDeleted = true;
1020 data().DefaultedMoveAssignmentIsDeleted = true;
1021 data().DefaultedDestructorIsDeleted = true;
1022 data().NeedOverloadResolutionForCopyConstructor = true;
1023 data().NeedOverloadResolutionForMoveConstructor = true;
1024 data().NeedOverloadResolutionForMoveAssignment = true;
1025 data().NeedOverloadResolutionForDestructor = true;
1026 }
1027 } else if (!Context.getLangOpts().ObjCAutoRefCount) {
1028 setHasObjectMember(true);
1029 }
1030 } else if (!T.isCXX98PODType(Context))
1031 data().PlainOldData = false;
1032
1033 if (T->isReferenceType()) {
1034 if (!Field->hasInClassInitializer())
1035 data().HasUninitializedReferenceMember = true;
1036
1037 // C++0x [class]p7:
1038 // A standard-layout class is a class that:
1039 // -- has no non-static data members of type [...] reference,
1040 data().IsStandardLayout = false;
1041 data().IsCXX11StandardLayout = false;
1042
1043 // C++1z [class.copy.ctor]p10:
1044 // A defaulted copy constructor for a class X is defined as deleted if X has:
1045 // -- a non-static data member of rvalue reference type
1046 if (T->isRValueReferenceType())
1047 data().DefaultedCopyConstructorIsDeleted = true;
1048 }
1049
1050 if (!Field->hasInClassInitializer() && !Field->isMutable()) {
1051 if (CXXRecordDecl *FieldType = T->getAsCXXRecordDecl()) {
1052 if (FieldType->hasDefinition() && !FieldType->allowConstDefaultInit())
1053 data().HasUninitializedFields = true;
1054 } else {
1055 data().HasUninitializedFields = true;
1056 }
1057 }
1058
1059 // Record if this field is the first non-literal or volatile field or base.
1060 if (!T->isLiteralType(Context) || T.isVolatileQualified())
1061 data().HasNonLiteralTypeFieldsOrBases = true;
1062
1063 if (Field->hasInClassInitializer() ||
1064 (Field->isAnonymousStructOrUnion() &&
1065 Field->getType()->getAsCXXRecordDecl()->hasInClassInitializer())) {
1066 data().HasInClassInitializer = true;
1067
1068 // C++11 [class]p5:
1069 // A default constructor is trivial if [...] no non-static data member
1070 // of its class has a brace-or-equal-initializer.
1071 data().HasTrivialSpecialMembers &= ~SMF_DefaultConstructor;
1072
1073 // C++11 [dcl.init.aggr]p1:
1074 // An aggregate is a [...] class with [...] no
1075 // brace-or-equal-initializers for non-static data members.
1076 //
1077 // This rule was removed in C++14.
1078 if (!getASTContext().getLangOpts().CPlusPlus14)
1079 data().Aggregate = false;
1080
1081 // C++11 [class]p10:
1082 // A POD struct is [...] a trivial class.
1083 data().PlainOldData = false;
1084 }
1085
1086 // C++11 [class.copy]p23:
1087 // A defaulted copy/move assignment operator for a class X is defined
1088 // as deleted if X has:
1089 // -- a non-static data member of reference type
1090 if (T->isReferenceType())
1091 data().DefaultedMoveAssignmentIsDeleted = true;
1092
1093 // Bitfields of length 0 are also zero-sized, but we already bailed out for
1094 // those because they are always unnamed.
1095 bool IsZeroSize = Field->isZeroSize(Context);
1096
1097 if (const auto *RecordTy = T->getAs<RecordType>()) {
1098 auto *FieldRec = cast<CXXRecordDecl>(RecordTy->getDecl());
1099 if (FieldRec->getDefinition()) {
1100 addedClassSubobject(FieldRec);
1101
1102 // We may need to perform overload resolution to determine whether a
1103 // field can be moved if it's const or volatile qualified.
1104 if (T.getCVRQualifiers() & (Qualifiers::Const | Qualifiers::Volatile)) {
1105 // We need to care about 'const' for the copy constructor because an
1106 // implicit copy constructor might be declared with a non-const
1107 // parameter.
1108 data().NeedOverloadResolutionForCopyConstructor = true;
1109 data().NeedOverloadResolutionForMoveConstructor = true;
1110 data().NeedOverloadResolutionForMoveAssignment = true;
1111 }
1112
1113 // C++11 [class.ctor]p5, C++11 [class.copy]p11:
1114 // A defaulted [special member] for a class X is defined as
1115 // deleted if:
1116 // -- X is a union-like class that has a variant member with a
1117 // non-trivial [corresponding special member]
1118 if (isUnion()) {
1119 if (FieldRec->hasNonTrivialCopyConstructor())
1120 data().DefaultedCopyConstructorIsDeleted = true;
1121 if (FieldRec->hasNonTrivialMoveConstructor())
1122 data().DefaultedMoveConstructorIsDeleted = true;
1123 if (FieldRec->hasNonTrivialMoveAssignment())
1124 data().DefaultedMoveAssignmentIsDeleted = true;
1125 if (FieldRec->hasNonTrivialDestructor())
1126 data().DefaultedDestructorIsDeleted = true;
1127 }
1128
1129 // For an anonymous union member, our overload resolution will perform
1130 // overload resolution for its members.
1131 if (Field->isAnonymousStructOrUnion()) {
1132 data().NeedOverloadResolutionForCopyConstructor |=
1133 FieldRec->data().NeedOverloadResolutionForCopyConstructor;
1134 data().NeedOverloadResolutionForMoveConstructor |=
1135 FieldRec->data().NeedOverloadResolutionForMoveConstructor;
1136 data().NeedOverloadResolutionForMoveAssignment |=
1137 FieldRec->data().NeedOverloadResolutionForMoveAssignment;
1138 data().NeedOverloadResolutionForDestructor |=
1139 FieldRec->data().NeedOverloadResolutionForDestructor;
1140 }
1141
1142 // C++0x [class.ctor]p5:
1143 // A default constructor is trivial [...] if:
1144 // -- for all the non-static data members of its class that are of
1145 // class type (or array thereof), each such class has a trivial
1146 // default constructor.
1147 if (!FieldRec->hasTrivialDefaultConstructor())
1148 data().HasTrivialSpecialMembers &= ~SMF_DefaultConstructor;
1149
1150 // C++0x [class.copy]p13:
1151 // A copy/move constructor for class X is trivial if [...]
1152 // [...]
1153 // -- for each non-static data member of X that is of class type (or
1154 // an array thereof), the constructor selected to copy/move that
1155 // member is trivial;
1156 if (!FieldRec->hasTrivialCopyConstructor())
1157 data().HasTrivialSpecialMembers &= ~SMF_CopyConstructor;
1158
1159 if (!FieldRec->hasTrivialCopyConstructorForCall())
1160 data().HasTrivialSpecialMembersForCall &= ~SMF_CopyConstructor;
1161
1162 // If the field doesn't have a simple move constructor, we'll eagerly
1163 // declare the move constructor for this class and we'll decide whether
1164 // it's trivial then.
1165 if (!FieldRec->hasTrivialMoveConstructor())
1166 data().HasTrivialSpecialMembers &= ~SMF_MoveConstructor;
1167
1168 if (!FieldRec->hasTrivialMoveConstructorForCall())
1169 data().HasTrivialSpecialMembersForCall &= ~SMF_MoveConstructor;
1170
1171 // C++0x [class.copy]p27:
1172 // A copy/move assignment operator for class X is trivial if [...]
1173 // [...]
1174 // -- for each non-static data member of X that is of class type (or
1175 // an array thereof), the assignment operator selected to
1176 // copy/move that member is trivial;
1177 if (!FieldRec->hasTrivialCopyAssignment())
1178 data().HasTrivialSpecialMembers &= ~SMF_CopyAssignment;
1179 // If the field doesn't have a simple move assignment, we'll eagerly
1180 // declare the move assignment for this class and we'll decide whether
1181 // it's trivial then.
1182 if (!FieldRec->hasTrivialMoveAssignment())
1183 data().HasTrivialSpecialMembers &= ~SMF_MoveAssignment;
1184
1185 if (!FieldRec->hasTrivialDestructor())
1186 data().HasTrivialSpecialMembers &= ~SMF_Destructor;
1187 if (!FieldRec->hasTrivialDestructorForCall())
1188 data().HasTrivialSpecialMembersForCall &= ~SMF_Destructor;
1189 if (!FieldRec->hasIrrelevantDestructor())
1190 data().HasIrrelevantDestructor = false;
1191 if (FieldRec->hasObjectMember())
1192 setHasObjectMember(true);
1193 if (FieldRec->hasVolatileMember())
1194 setHasVolatileMember(true);
1195 if (FieldRec->getArgPassingRestrictions() ==
1196 RecordDecl::APK_CanNeverPassInRegs)
1197 setArgPassingRestrictions(RecordDecl::APK_CanNeverPassInRegs);
1198
1199 // C++0x [class]p7:
1200 // A standard-layout class is a class that:
1201 // -- has no non-static data members of type non-standard-layout
1202 // class (or array of such types) [...]
1203 if (!FieldRec->isStandardLayout())
1204 data().IsStandardLayout = false;
1205 if (!FieldRec->isCXX11StandardLayout())
1206 data().IsCXX11StandardLayout = false;
1207
1208 // C++2a [class]p7:
1209 // A standard-layout class is a class that:
1210 // [...]
1211 // -- has no element of the set M(S) of types as a base class.
1212 if (data().IsStandardLayout &&
1213 (isUnion() || IsFirstField || IsZeroSize) &&
1214 hasSubobjectAtOffsetZeroOfEmptyBaseType(Context, FieldRec))
1215 data().IsStandardLayout = false;
1216
1217 // C++11 [class]p7:
1218 // A standard-layout class is a class that:
1219 // -- has no base classes of the same type as the first non-static
1220 // data member
1221 if (data().IsCXX11StandardLayout && IsFirstField) {
1222 // FIXME: We should check all base classes here, not just direct
1223 // base classes.
1224 for (const auto &BI : bases()) {
1225 if (Context.hasSameUnqualifiedType(BI.getType(), T)) {
1226 data().IsCXX11StandardLayout = false;
1227 break;
1228 }
1229 }
1230 }
1231
1232 // Keep track of the presence of mutable fields.
1233 if (FieldRec->hasMutableFields()) {
1234 data().HasMutableFields = true;
1235 data().NeedOverloadResolutionForCopyConstructor = true;
1236 }
1237
1238 // C++11 [class.copy]p13:
1239 // If the implicitly-defined constructor would satisfy the
1240 // requirements of a constexpr constructor, the implicitly-defined
1241 // constructor is constexpr.
1242 // C++11 [dcl.constexpr]p4:
1243 // -- every constructor involved in initializing non-static data
1244 // members [...] shall be a constexpr constructor
1245 if (!Field->hasInClassInitializer() &&
1246 !FieldRec->hasConstexprDefaultConstructor() && !isUnion())
1247 // The standard requires any in-class initializer to be a constant
1248 // expression. We consider this to be a defect.
1249 data().DefaultedDefaultConstructorIsConstexpr = false;
1250
1251 // C++11 [class.copy]p8:
1252 // The implicitly-declared copy constructor for a class X will have
1253 // the form 'X::X(const X&)' if each potentially constructed subobject
1254 // of a class type M (or array thereof) has a copy constructor whose
1255 // first parameter is of type 'const M&' or 'const volatile M&'.
1256 if (!FieldRec->hasCopyConstructorWithConstParam())
1257 data().ImplicitCopyConstructorCanHaveConstParamForNonVBase = false;
1258
1259 // C++11 [class.copy]p18:
1260 // The implicitly-declared copy assignment oeprator for a class X will
1261 // have the form 'X& X::operator=(const X&)' if [...] for all the
1262 // non-static data members of X that are of a class type M (or array
1263 // thereof), each such class type has a copy assignment operator whose
1264 // parameter is of type 'const M&', 'const volatile M&' or 'M'.
1265 if (!FieldRec->hasCopyAssignmentWithConstParam())
1266 data().ImplicitCopyAssignmentHasConstParam = false;
1267
1268 if (FieldRec->hasUninitializedReferenceMember() &&
1269 !Field->hasInClassInitializer())
1270 data().HasUninitializedReferenceMember = true;
1271
1272 // C++11 [class.union]p8, DR1460:
1273 // a non-static data member of an anonymous union that is a member of
1274 // X is also a variant member of X.
1275 if (FieldRec->hasVariantMembers() &&
1276 Field->isAnonymousStructOrUnion())
1277 data().HasVariantMembers = true;
1278 }
1279 } else {
1280 // Base element type of field is a non-class type.
1281 if (!T->isLiteralType(Context) ||
1282 (!Field->hasInClassInitializer() && !isUnion() &&
1283 !Context.getLangOpts().CPlusPlus2a))
1284 data().DefaultedDefaultConstructorIsConstexpr = false;
1285
1286 // C++11 [class.copy]p23:
1287 // A defaulted copy/move assignment operator for a class X is defined
1288 // as deleted if X has:
1289 // -- a non-static data member of const non-class type (or array
1290 // thereof)
1291 if (T.isConstQualified())
1292 data().DefaultedMoveAssignmentIsDeleted = true;
1293 }
1294
1295 // C++14 [meta.unary.prop]p4:
1296 // T is a class type [...] with [...] no non-static data members other
1297 // than subobjects of zero size
1298 if (data().Empty && !IsZeroSize)
1299 data().Empty = false;
1300 }
1301
1302 // Handle using declarations of conversion functions.
1303 if (auto *Shadow = dyn_cast<UsingShadowDecl>(D)) {
1304 if (Shadow->getDeclName().getNameKind()
1305 == DeclarationName::CXXConversionFunctionName) {
1306 ASTContext &Ctx = getASTContext();
1307 data().Conversions.get(Ctx).addDecl(Ctx, Shadow, Shadow->getAccess());
1308 }
1309 }
1310
1311 if (const auto *Using = dyn_cast<UsingDecl>(D)) {
1312 if (Using->getDeclName().getNameKind() ==
1313 DeclarationName::CXXConstructorName) {
1314 data().HasInheritedConstructor = true;
1315 // C++1z [dcl.init.aggr]p1:
1316 // An aggregate is [...] a class [...] with no inherited constructors
1317 data().Aggregate = false;
1318 }
1319
1320 if (Using->getDeclName().getCXXOverloadedOperator() == OO_Equal)
1321 data().HasInheritedAssignment = true;
1322 }
1323}
1324
1325void CXXRecordDecl::finishedDefaultedOrDeletedMember(CXXMethodDecl *D) {
1326 assert(!D->isImplicit() && !D->isUserProvided())((!D->isImplicit() && !D->isUserProvided()) ? static_cast
<void> (0) : __assert_fail ("!D->isImplicit() && !D->isUserProvided()"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1326, __PRETTY_FUNCTION__))
;
1327
1328 // The kind of special member this declaration is, if any.
1329 unsigned SMKind = 0;
1330
1331 if (const auto *Constructor = dyn_cast<CXXConstructorDecl>(D)) {
1332 if (Constructor->isDefaultConstructor()) {
1333 SMKind |= SMF_DefaultConstructor;
1334 if (Constructor->isConstexpr())
1335 data().HasConstexprDefaultConstructor = true;
1336 }
1337 if (Constructor->isCopyConstructor())
1338 SMKind |= SMF_CopyConstructor;
1339 else if (Constructor->isMoveConstructor())
1340 SMKind |= SMF_MoveConstructor;
1341 else if (Constructor->isConstexpr())
1342 // We may now know that the constructor is constexpr.
1343 data().HasConstexprNonCopyMoveConstructor = true;
1344 } else if (isa<CXXDestructorDecl>(D)) {
1345 SMKind |= SMF_Destructor;
1346 if (!D->isTrivial() || D->getAccess() != AS_public || D->isDeleted())
1347 data().HasIrrelevantDestructor = false;
1348 } else if (D->isCopyAssignmentOperator())
1349 SMKind |= SMF_CopyAssignment;
1350 else if (D->isMoveAssignmentOperator())
1351 SMKind |= SMF_MoveAssignment;
1352
1353 // Update which trivial / non-trivial special members we have.
1354 // addedMember will have skipped this step for this member.
1355 if (D->isTrivial())
1356 data().HasTrivialSpecialMembers |= SMKind;
1357 else
1358 data().DeclaredNonTrivialSpecialMembers |= SMKind;
1359}
1360
1361void CXXRecordDecl::setTrivialForCallFlags(CXXMethodDecl *D) {
1362 unsigned SMKind = 0;
1363
1364 if (const auto *Constructor = dyn_cast<CXXConstructorDecl>(D)) {
1365 if (Constructor->isCopyConstructor())
1366 SMKind = SMF_CopyConstructor;
1367 else if (Constructor->isMoveConstructor())
1368 SMKind = SMF_MoveConstructor;
1369 } else if (isa<CXXDestructorDecl>(D))
1370 SMKind = SMF_Destructor;
1371
1372 if (D->isTrivialForCall())
1373 data().HasTrivialSpecialMembersForCall |= SMKind;
1374 else
1375 data().DeclaredNonTrivialSpecialMembersForCall |= SMKind;
1376}
1377
1378bool CXXRecordDecl::isCLike() const {
1379 if (getTagKind() == TTK_Class || getTagKind() == TTK_Interface ||
1380 !TemplateOrInstantiation.isNull())
1381 return false;
1382 if (!hasDefinition())
1383 return true;
1384
1385 return isPOD() && data().HasOnlyCMembers;
1386}
1387
1388bool CXXRecordDecl::isGenericLambda() const {
1389 if (!isLambda()) return false;
1390 return getLambdaData().IsGenericLambda;
1391}
1392
1393#ifndef NDEBUG
1394static bool allLookupResultsAreTheSame(const DeclContext::lookup_result &R) {
1395 for (auto *D : R)
1396 if (!declaresSameEntity(D, R.front()))
1397 return false;
1398 return true;
1399}
1400#endif
1401
1402static NamedDecl* getLambdaCallOperatorHelper(const CXXRecordDecl &RD) {
1403 if (!RD.isLambda()) return nullptr;
1404 DeclarationName Name =
1405 RD.getASTContext().DeclarationNames.getCXXOperatorName(OO_Call);
1406 DeclContext::lookup_result Calls = RD.lookup(Name);
1407
1408 assert(!Calls.empty() && "Missing lambda call operator!")((!Calls.empty() && "Missing lambda call operator!") ?
static_cast<void> (0) : __assert_fail ("!Calls.empty() && \"Missing lambda call operator!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1408, __PRETTY_FUNCTION__))
;
1409 assert(allLookupResultsAreTheSame(Calls) &&((allLookupResultsAreTheSame(Calls) && "More than one lambda call operator!"
) ? static_cast<void> (0) : __assert_fail ("allLookupResultsAreTheSame(Calls) && \"More than one lambda call operator!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1410, __PRETTY_FUNCTION__))
1410 "More than one lambda call operator!")((allLookupResultsAreTheSame(Calls) && "More than one lambda call operator!"
) ? static_cast<void> (0) : __assert_fail ("allLookupResultsAreTheSame(Calls) && \"More than one lambda call operator!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1410, __PRETTY_FUNCTION__))
;
1411 return Calls.front();
1412}
1413
1414FunctionTemplateDecl* CXXRecordDecl::getDependentLambdaCallOperator() const {
1415 NamedDecl *CallOp = getLambdaCallOperatorHelper(*this);
1416 return dyn_cast_or_null<FunctionTemplateDecl>(CallOp);
1417}
1418
1419CXXMethodDecl *CXXRecordDecl::getLambdaCallOperator() const {
1420 NamedDecl *CallOp = getLambdaCallOperatorHelper(*this);
1421
1422 if (CallOp == nullptr)
1423 return nullptr;
1424
1425 if (const auto *CallOpTmpl = dyn_cast<FunctionTemplateDecl>(CallOp))
1426 return cast<CXXMethodDecl>(CallOpTmpl->getTemplatedDecl());
1427
1428 return cast<CXXMethodDecl>(CallOp);
1429}
1430
1431CXXMethodDecl* CXXRecordDecl::getLambdaStaticInvoker() const {
1432 if (!isLambda()) return nullptr;
1433 DeclarationName Name =
1434 &getASTContext().Idents.get(getLambdaStaticInvokerName());
1435 DeclContext::lookup_result Invoker = lookup(Name);
1436 if (Invoker.empty()) return nullptr;
1437 assert(allLookupResultsAreTheSame(Invoker) &&((allLookupResultsAreTheSame(Invoker) && "More than one static invoker operator!"
) ? static_cast<void> (0) : __assert_fail ("allLookupResultsAreTheSame(Invoker) && \"More than one static invoker operator!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1438, __PRETTY_FUNCTION__))
1438 "More than one static invoker operator!")((allLookupResultsAreTheSame(Invoker) && "More than one static invoker operator!"
) ? static_cast<void> (0) : __assert_fail ("allLookupResultsAreTheSame(Invoker) && \"More than one static invoker operator!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1438, __PRETTY_FUNCTION__))
;
1439 NamedDecl *InvokerFun = Invoker.front();
1440 if (const auto *InvokerTemplate = dyn_cast<FunctionTemplateDecl>(InvokerFun))
1441 return cast<CXXMethodDecl>(InvokerTemplate->getTemplatedDecl());
1442
1443 return cast<CXXMethodDecl>(InvokerFun);
1444}
1445
1446void CXXRecordDecl::getCaptureFields(
1447 llvm::DenseMap<const VarDecl *, FieldDecl *> &Captures,
1448 FieldDecl *&ThisCapture) const {
1449 Captures.clear();
1450 ThisCapture = nullptr;
1451
1452 LambdaDefinitionData &Lambda = getLambdaData();
1453 RecordDecl::field_iterator Field = field_begin();
1454 for (const LambdaCapture *C = Lambda.Captures, *CEnd = C + Lambda.NumCaptures;
1455 C != CEnd; ++C, ++Field) {
1456 if (C->capturesThis())
1457 ThisCapture = *Field;
1458 else if (C->capturesVariable())
1459 Captures[C->getCapturedVar()] = *Field;
1460 }
1461 assert(Field == field_end())((Field == field_end()) ? static_cast<void> (0) : __assert_fail
("Field == field_end()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1461, __PRETTY_FUNCTION__))
;
1462}
1463
1464TemplateParameterList *
1465CXXRecordDecl::getGenericLambdaTemplateParameterList() const {
1466 if (!isGenericLambda()) return nullptr;
1467 CXXMethodDecl *CallOp = getLambdaCallOperator();
1468 if (FunctionTemplateDecl *Tmpl = CallOp->getDescribedFunctionTemplate())
1469 return Tmpl->getTemplateParameters();
1470 return nullptr;
1471}
1472
1473ArrayRef<NamedDecl *>
1474CXXRecordDecl::getLambdaExplicitTemplateParameters() const {
1475 TemplateParameterList *List = getGenericLambdaTemplateParameterList();
1476 if (!List)
1477 return {};
1478
1479 assert(std::is_partitioned(List->begin(), List->end(),((std::is_partitioned(List->begin(), List->end(), [](const
NamedDecl *D) { return !D->isImplicit(); }) && "Explicit template params should be ordered before implicit ones"
) ? static_cast<void> (0) : __assert_fail ("std::is_partitioned(List->begin(), List->end(), [](const NamedDecl *D) { return !D->isImplicit(); }) && \"Explicit template params should be ordered before implicit ones\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1481, __PRETTY_FUNCTION__))
1480 [](const NamedDecl *D) { return !D->isImplicit(); })((std::is_partitioned(List->begin(), List->end(), [](const
NamedDecl *D) { return !D->isImplicit(); }) && "Explicit template params should be ordered before implicit ones"
) ? static_cast<void> (0) : __assert_fail ("std::is_partitioned(List->begin(), List->end(), [](const NamedDecl *D) { return !D->isImplicit(); }) && \"Explicit template params should be ordered before implicit ones\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1481, __PRETTY_FUNCTION__))
1481 && "Explicit template params should be ordered before implicit ones")((std::is_partitioned(List->begin(), List->end(), [](const
NamedDecl *D) { return !D->isImplicit(); }) && "Explicit template params should be ordered before implicit ones"
) ? static_cast<void> (0) : __assert_fail ("std::is_partitioned(List->begin(), List->end(), [](const NamedDecl *D) { return !D->isImplicit(); }) && \"Explicit template params should be ordered before implicit ones\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1481, __PRETTY_FUNCTION__))
;
1482
1483 const auto ExplicitEnd = llvm::partition_point(
1484 *List, [](const NamedDecl *D) { return !D->isImplicit(); });
1485 return llvm::makeArrayRef(List->begin(), ExplicitEnd);
1486}
1487
1488Decl *CXXRecordDecl::getLambdaContextDecl() const {
1489 assert(isLambda() && "Not a lambda closure type!")((isLambda() && "Not a lambda closure type!") ? static_cast
<void> (0) : __assert_fail ("isLambda() && \"Not a lambda closure type!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1489, __PRETTY_FUNCTION__))
;
1490 ExternalASTSource *Source = getParentASTContext().getExternalSource();
1491 return getLambdaData().ContextDecl.get(Source);
1492}
1493
1494static CanQualType GetConversionType(ASTContext &Context, NamedDecl *Conv) {
1495 QualType T =
1496 cast<CXXConversionDecl>(Conv->getUnderlyingDecl()->getAsFunction())
1497 ->getConversionType();
1498 return Context.getCanonicalType(T);
1499}
1500
1501/// Collect the visible conversions of a base class.
1502///
1503/// \param Record a base class of the class we're considering
1504/// \param InVirtual whether this base class is a virtual base (or a base
1505/// of a virtual base)
1506/// \param Access the access along the inheritance path to this base
1507/// \param ParentHiddenTypes the conversions provided by the inheritors
1508/// of this base
1509/// \param Output the set to which to add conversions from non-virtual bases
1510/// \param VOutput the set to which to add conversions from virtual bases
1511/// \param HiddenVBaseCs the set of conversions which were hidden in a
1512/// virtual base along some inheritance path
1513static void CollectVisibleConversions(ASTContext &Context,
1514 CXXRecordDecl *Record,
1515 bool InVirtual,
1516 AccessSpecifier Access,
1517 const llvm::SmallPtrSet<CanQualType, 8> &ParentHiddenTypes,
1518 ASTUnresolvedSet &Output,
1519 UnresolvedSetImpl &VOutput,
1520 llvm::SmallPtrSet<NamedDecl*, 8> &HiddenVBaseCs) {
1521 // The set of types which have conversions in this class or its
1522 // subclasses. As an optimization, we don't copy the derived set
1523 // unless it might change.
1524 const llvm::SmallPtrSet<CanQualType, 8> *HiddenTypes = &ParentHiddenTypes;
1525 llvm::SmallPtrSet<CanQualType, 8> HiddenTypesBuffer;
1526
1527 // Collect the direct conversions and figure out which conversions
1528 // will be hidden in the subclasses.
1529 CXXRecordDecl::conversion_iterator ConvI = Record->conversion_begin();
1530 CXXRecordDecl::conversion_iterator ConvE = Record->conversion_end();
1531 if (ConvI != ConvE) {
1532 HiddenTypesBuffer = ParentHiddenTypes;
1533 HiddenTypes = &HiddenTypesBuffer;
1534
1535 for (CXXRecordDecl::conversion_iterator I = ConvI; I != ConvE; ++I) {
1536 CanQualType ConvType(GetConversionType(Context, I.getDecl()));
1537 bool Hidden = ParentHiddenTypes.count(ConvType);
1538 if (!Hidden)
1539 HiddenTypesBuffer.insert(ConvType);
1540
1541 // If this conversion is hidden and we're in a virtual base,
1542 // remember that it's hidden along some inheritance path.
1543 if (Hidden && InVirtual)
1544 HiddenVBaseCs.insert(cast<NamedDecl>(I.getDecl()->getCanonicalDecl()));
1545
1546 // If this conversion isn't hidden, add it to the appropriate output.
1547 else if (!Hidden) {
1548 AccessSpecifier IAccess
1549 = CXXRecordDecl::MergeAccess(Access, I.getAccess());
1550
1551 if (InVirtual)
1552 VOutput.addDecl(I.getDecl(), IAccess);
1553 else
1554 Output.addDecl(Context, I.getDecl(), IAccess);
1555 }
1556 }
1557 }
1558
1559 // Collect information recursively from any base classes.
1560 for (const auto &I : Record->bases()) {
1561 const RecordType *RT = I.getType()->getAs<RecordType>();
1562 if (!RT) continue;
1563
1564 AccessSpecifier BaseAccess
1565 = CXXRecordDecl::MergeAccess(Access, I.getAccessSpecifier());
1566 bool BaseInVirtual = InVirtual || I.isVirtual();
1567
1568 auto *Base = cast<CXXRecordDecl>(RT->getDecl());
1569 CollectVisibleConversions(Context, Base, BaseInVirtual, BaseAccess,
1570 *HiddenTypes, Output, VOutput, HiddenVBaseCs);
1571 }
1572}
1573
1574/// Collect the visible conversions of a class.
1575///
1576/// This would be extremely straightforward if it weren't for virtual
1577/// bases. It might be worth special-casing that, really.
1578static void CollectVisibleConversions(ASTContext &Context,
1579 CXXRecordDecl *Record,
1580 ASTUnresolvedSet &Output) {
1581 // The collection of all conversions in virtual bases that we've
1582 // found. These will be added to the output as long as they don't
1583 // appear in the hidden-conversions set.
1584 UnresolvedSet<8> VBaseCs;
1585
1586 // The set of conversions in virtual bases that we've determined to
1587 // be hidden.
1588 llvm::SmallPtrSet<NamedDecl*, 8> HiddenVBaseCs;
1589
1590 // The set of types hidden by classes derived from this one.
1591 llvm::SmallPtrSet<CanQualType, 8> HiddenTypes;
1592
1593 // Go ahead and collect the direct conversions and add them to the
1594 // hidden-types set.
1595 CXXRecordDecl::conversion_iterator ConvI = Record->conversion_begin();
1596 CXXRecordDecl::conversion_iterator ConvE = Record->conversion_end();
1597 Output.append(Context, ConvI, ConvE);
1598 for (; ConvI != ConvE; ++ConvI)
1599 HiddenTypes.insert(GetConversionType(Context, ConvI.getDecl()));
1600
1601 // Recursively collect conversions from base classes.
1602 for (const auto &I : Record->bases()) {
1603 const RecordType *RT = I.getType()->getAs<RecordType>();
1604 if (!RT) continue;
1605
1606 CollectVisibleConversions(Context, cast<CXXRecordDecl>(RT->getDecl()),
1607 I.isVirtual(), I.getAccessSpecifier(),
1608 HiddenTypes, Output, VBaseCs, HiddenVBaseCs);
1609 }
1610
1611 // Add any unhidden conversions provided by virtual bases.
1612 for (UnresolvedSetIterator I = VBaseCs.begin(), E = VBaseCs.end();
1613 I != E; ++I) {
1614 if (!HiddenVBaseCs.count(cast<NamedDecl>(I.getDecl()->getCanonicalDecl())))
1615 Output.addDecl(Context, I.getDecl(), I.getAccess());
1616 }
1617}
1618
1619/// getVisibleConversionFunctions - get all conversion functions visible
1620/// in current class; including conversion function templates.
1621llvm::iterator_range<CXXRecordDecl::conversion_iterator>
1622CXXRecordDecl::getVisibleConversionFunctions() {
1623 ASTContext &Ctx = getASTContext();
1624
1625 ASTUnresolvedSet *Set;
1626 if (bases_begin() == bases_end()) {
1627 // If root class, all conversions are visible.
1628 Set = &data().Conversions.get(Ctx);
1629 } else {
1630 Set = &data().VisibleConversions.get(Ctx);
1631 // If visible conversion list is not evaluated, evaluate it.
1632 if (!data().ComputedVisibleConversions) {
1633 CollectVisibleConversions(Ctx, this, *Set);
1634 data().ComputedVisibleConversions = true;
1635 }
1636 }
1637 return llvm::make_range(Set->begin(), Set->end());
1638}
1639
1640void CXXRecordDecl::removeConversion(const NamedDecl *ConvDecl) {
1641 // This operation is O(N) but extremely rare. Sema only uses it to
1642 // remove UsingShadowDecls in a class that were followed by a direct
1643 // declaration, e.g.:
1644 // class A : B {
1645 // using B::operator int;
1646 // operator int();
1647 // };
1648 // This is uncommon by itself and even more uncommon in conjunction
1649 // with sufficiently large numbers of directly-declared conversions
1650 // that asymptotic behavior matters.
1651
1652 ASTUnresolvedSet &Convs = data().Conversions.get(getASTContext());
1653 for (unsigned I = 0, E = Convs.size(); I != E; ++I) {
1654 if (Convs[I].getDecl() == ConvDecl) {
1655 Convs.erase(I);
1656 assert(llvm::find(Convs, ConvDecl) == Convs.end() &&((llvm::find(Convs, ConvDecl) == Convs.end() && "conversion was found multiple times in unresolved set"
) ? static_cast<void> (0) : __assert_fail ("llvm::find(Convs, ConvDecl) == Convs.end() && \"conversion was found multiple times in unresolved set\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1657, __PRETTY_FUNCTION__))
1657 "conversion was found multiple times in unresolved set")((llvm::find(Convs, ConvDecl) == Convs.end() && "conversion was found multiple times in unresolved set"
) ? static_cast<void> (0) : __assert_fail ("llvm::find(Convs, ConvDecl) == Convs.end() && \"conversion was found multiple times in unresolved set\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1657, __PRETTY_FUNCTION__))
;
1658 return;
1659 }
1660 }
1661
1662 llvm_unreachable("conversion not found in set!")::llvm::llvm_unreachable_internal("conversion not found in set!"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1662)
;
1663}
1664
1665CXXRecordDecl *CXXRecordDecl::getInstantiatedFromMemberClass() const {
1666 if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo())
1667 return cast<CXXRecordDecl>(MSInfo->getInstantiatedFrom());
1668
1669 return nullptr;
1670}
1671
1672MemberSpecializationInfo *CXXRecordDecl::getMemberSpecializationInfo() const {
1673 return TemplateOrInstantiation.dyn_cast<MemberSpecializationInfo *>();
1674}
1675
1676void
1677CXXRecordDecl::setInstantiationOfMemberClass(CXXRecordDecl *RD,
1678 TemplateSpecializationKind TSK) {
1679 assert(TemplateOrInstantiation.isNull() &&((TemplateOrInstantiation.isNull() && "Previous template or instantiation?"
) ? static_cast<void> (0) : __assert_fail ("TemplateOrInstantiation.isNull() && \"Previous template or instantiation?\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1680, __PRETTY_FUNCTION__))
1680 "Previous template or instantiation?")((TemplateOrInstantiation.isNull() && "Previous template or instantiation?"
) ? static_cast<void> (0) : __assert_fail ("TemplateOrInstantiation.isNull() && \"Previous template or instantiation?\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1680, __PRETTY_FUNCTION__))
;
1681 assert(!isa<ClassTemplatePartialSpecializationDecl>(this))((!isa<ClassTemplatePartialSpecializationDecl>(this)) ?
static_cast<void> (0) : __assert_fail ("!isa<ClassTemplatePartialSpecializationDecl>(this)"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1681, __PRETTY_FUNCTION__))
;
1682 TemplateOrInstantiation
1683 = new (getASTContext()) MemberSpecializationInfo(RD, TSK);
1684}
1685
1686ClassTemplateDecl *CXXRecordDecl::getDescribedClassTemplate() const {
1687 return TemplateOrInstantiation.dyn_cast<ClassTemplateDecl *>();
1688}
1689
1690void CXXRecordDecl::setDescribedClassTemplate(ClassTemplateDecl *Template) {
1691 TemplateOrInstantiation = Template;
1692}
1693
1694TemplateSpecializationKind CXXRecordDecl::getTemplateSpecializationKind() const{
1695 if (const auto *Spec = dyn_cast<ClassTemplateSpecializationDecl>(this))
1696 return Spec->getSpecializationKind();
1697
1698 if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo())
1699 return MSInfo->getTemplateSpecializationKind();
1700
1701 return TSK_Undeclared;
1702}
1703
1704void
1705CXXRecordDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK) {
1706 if (auto *Spec = dyn_cast<ClassTemplateSpecializationDecl>(this)) {
1707 Spec->setSpecializationKind(TSK);
1708 return;
1709 }
1710
1711 if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo()) {
1712 MSInfo->setTemplateSpecializationKind(TSK);
1713 return;
1714 }
1715
1716 llvm_unreachable("Not a class template or member class specialization")::llvm::llvm_unreachable_internal("Not a class template or member class specialization"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1716)
;
1717}
1718
1719const CXXRecordDecl *CXXRecordDecl::getTemplateInstantiationPattern() const {
1720 auto GetDefinitionOrSelf =
1721 [](const CXXRecordDecl *D) -> const CXXRecordDecl * {
1722 if (auto *Def = D->getDefinition())
1723 return Def;
1724 return D;
1725 };
1726
1727 // If it's a class template specialization, find the template or partial
1728 // specialization from which it was instantiated.
1729 if (auto *TD = dyn_cast<ClassTemplateSpecializationDecl>(this)) {
1730 auto From = TD->getInstantiatedFrom();
1731 if (auto *CTD = From.dyn_cast<ClassTemplateDecl *>()) {
1732 while (auto *NewCTD = CTD->getInstantiatedFromMemberTemplate()) {
1733 if (NewCTD->isMemberSpecialization())
1734 break;
1735 CTD = NewCTD;
1736 }
1737 return GetDefinitionOrSelf(CTD->getTemplatedDecl());
1738 }
1739 if (auto *CTPSD =
1740 From.dyn_cast<ClassTemplatePartialSpecializationDecl *>()) {
1741 while (auto *NewCTPSD = CTPSD->getInstantiatedFromMember()) {
1742 if (NewCTPSD->isMemberSpecialization())
1743 break;
1744 CTPSD = NewCTPSD;
1745 }
1746 return GetDefinitionOrSelf(CTPSD);
1747 }
1748 }
1749
1750 if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo()) {
1751 if (isTemplateInstantiation(MSInfo->getTemplateSpecializationKind())) {
1752 const CXXRecordDecl *RD = this;
1753 while (auto *NewRD = RD->getInstantiatedFromMemberClass())
1754 RD = NewRD;
1755 return GetDefinitionOrSelf(RD);
1756 }
1757 }
1758
1759 assert(!isTemplateInstantiation(this->getTemplateSpecializationKind()) &&((!isTemplateInstantiation(this->getTemplateSpecializationKind
()) && "couldn't find pattern for class template instantiation"
) ? static_cast<void> (0) : __assert_fail ("!isTemplateInstantiation(this->getTemplateSpecializationKind()) && \"couldn't find pattern for class template instantiation\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1760, __PRETTY_FUNCTION__))
1760 "couldn't find pattern for class template instantiation")((!isTemplateInstantiation(this->getTemplateSpecializationKind
()) && "couldn't find pattern for class template instantiation"
) ? static_cast<void> (0) : __assert_fail ("!isTemplateInstantiation(this->getTemplateSpecializationKind()) && \"couldn't find pattern for class template instantiation\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1760, __PRETTY_FUNCTION__))
;
1761 return nullptr;
1762}
1763
1764CXXDestructorDecl *CXXRecordDecl::getDestructor() const {
1765 ASTContext &Context = getASTContext();
1766 QualType ClassType = Context.getTypeDeclType(this);
1767
1768 DeclarationName Name
1769 = Context.DeclarationNames.getCXXDestructorName(
1770 Context.getCanonicalType(ClassType));
1771
1772 DeclContext::lookup_result R = lookup(Name);
1773
1774 return R.empty() ? nullptr : dyn_cast<CXXDestructorDecl>(R.front());
1775}
1776
1777bool CXXRecordDecl::isAnyDestructorNoReturn() const {
1778 // Destructor is noreturn.
1779 if (const CXXDestructorDecl *Destructor = getDestructor())
1780 if (Destructor->isNoReturn())
1781 return true;
1782
1783 // Check base classes destructor for noreturn.
1784 for (const auto &Base : bases())
1785 if (const CXXRecordDecl *RD = Base.getType()->getAsCXXRecordDecl())
1786 if (RD->isAnyDestructorNoReturn())
1787 return true;
1788
1789 // Check fields for noreturn.
1790 for (const auto *Field : fields())
1791 if (const CXXRecordDecl *RD =
1792 Field->getType()->getBaseElementTypeUnsafe()->getAsCXXRecordDecl())
1793 if (RD->isAnyDestructorNoReturn())
1794 return true;
1795
1796 // All destructors are not noreturn.
1797 return false;
1798}
1799
1800static bool isDeclContextInNamespace(const DeclContext *DC) {
1801 while (!DC->isTranslationUnit()) {
1802 if (DC->isNamespace())
1803 return true;
1804 DC = DC->getParent();
1805 }
1806 return false;
1807}
1808
1809bool CXXRecordDecl::isInterfaceLike() const {
1810 assert(hasDefinition() && "checking for interface-like without a definition")((hasDefinition() && "checking for interface-like without a definition"
) ? static_cast<void> (0) : __assert_fail ("hasDefinition() && \"checking for interface-like without a definition\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1810, __PRETTY_FUNCTION__))
;
1811 // All __interfaces are inheritently interface-like.
1812 if (isInterface())
1813 return true;
1814
1815 // Interface-like types cannot have a user declared constructor, destructor,
1816 // friends, VBases, conversion functions, or fields. Additionally, lambdas
1817 // cannot be interface types.
1818 if (isLambda() || hasUserDeclaredConstructor() ||
1819 hasUserDeclaredDestructor() || !field_empty() || hasFriends() ||
1820 getNumVBases() > 0 || conversion_end() - conversion_begin() > 0)
1821 return false;
1822
1823 // No interface-like type can have a method with a definition.
1824 for (const auto *const Method : methods())
1825 if (Method->isDefined() && !Method->isImplicit())
1826 return false;
1827
1828 // Check "Special" types.
1829 const auto *Uuid = getAttr<UuidAttr>();
1830 // MS SDK declares IUnknown/IDispatch both in the root of a TU, or in an
1831 // extern C++ block directly in the TU. These are only valid if in one
1832 // of these two situations.
1833 if (Uuid && isStruct() && !getDeclContext()->isExternCContext() &&
1834 !isDeclContextInNamespace(getDeclContext()) &&
1835 ((getName() == "IUnknown" &&
1836 Uuid->getGuid() == "00000000-0000-0000-C000-000000000046") ||
1837 (getName() == "IDispatch" &&
1838 Uuid->getGuid() == "00020400-0000-0000-C000-000000000046"))) {
1839 if (getNumBases() > 0)
1840 return false;
1841 return true;
1842 }
1843
1844 // FIXME: Any access specifiers is supposed to make this no longer interface
1845 // like.
1846
1847 // If this isn't a 'special' type, it must have a single interface-like base.
1848 if (getNumBases() != 1)
1849 return false;
1850
1851 const auto BaseSpec = *bases_begin();
1852 if (BaseSpec.isVirtual() || BaseSpec.getAccessSpecifier() != AS_public)
1853 return false;
1854 const auto *Base = BaseSpec.getType()->getAsCXXRecordDecl();
1855 if (Base->isInterface() || !Base->isInterfaceLike())
1856 return false;
1857 return true;
1858}
1859
1860void CXXRecordDecl::completeDefinition() {
1861 completeDefinition(nullptr);
1862}
1863
1864void CXXRecordDecl::completeDefinition(CXXFinalOverriderMap *FinalOverriders) {
1865 RecordDecl::completeDefinition();
1866
1867 // If the class may be abstract (but hasn't been marked as such), check for
1868 // any pure final overriders.
1869 if (mayBeAbstract()) {
1870 CXXFinalOverriderMap MyFinalOverriders;
1871 if (!FinalOverriders) {
1872 getFinalOverriders(MyFinalOverriders);
1873 FinalOverriders = &MyFinalOverriders;
1874 }
1875
1876 bool Done = false;
1877 for (CXXFinalOverriderMap::iterator M = FinalOverriders->begin(),
1878 MEnd = FinalOverriders->end();
1879 M != MEnd && !Done; ++M) {
1880 for (OverridingMethods::iterator SO = M->second.begin(),
1881 SOEnd = M->second.end();
1882 SO != SOEnd && !Done; ++SO) {
1883 assert(SO->second.size() > 0 &&((SO->second.size() > 0 && "All virtual functions have overriding virtual functions"
) ? static_cast<void> (0) : __assert_fail ("SO->second.size() > 0 && \"All virtual functions have overriding virtual functions\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1884, __PRETTY_FUNCTION__))
1884 "All virtual functions have overriding virtual functions")((SO->second.size() > 0 && "All virtual functions have overriding virtual functions"
) ? static_cast<void> (0) : __assert_fail ("SO->second.size() > 0 && \"All virtual functions have overriding virtual functions\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1884, __PRETTY_FUNCTION__))
;
1885
1886 // C++ [class.abstract]p4:
1887 // A class is abstract if it contains or inherits at least one
1888 // pure virtual function for which the final overrider is pure
1889 // virtual.
1890 if (SO->second.front().Method->isPure()) {
1891 data().Abstract = true;
1892 Done = true;
1893 break;
1894 }
1895 }
1896 }
1897 }
1898
1899 // Set access bits correctly on the directly-declared conversions.
1900 for (conversion_iterator I = conversion_begin(), E = conversion_end();
1901 I != E; ++I)
1902 I.setAccess((*I)->getAccess());
1903}
1904
1905bool CXXRecordDecl::mayBeAbstract() const {
1906 if (data().Abstract || isInvalidDecl() || !data().Polymorphic ||
1907 isDependentContext())
1908 return false;
1909
1910 for (const auto &B : bases()) {
1911 const auto *BaseDecl =
1912 cast<CXXRecordDecl>(B.getType()->getAs<RecordType>()->getDecl());
1913 if (BaseDecl->isAbstract())
1914 return true;
1915 }
1916
1917 return false;
1918}
1919
1920void CXXDeductionGuideDecl::anchor() {}
1921
1922bool ExplicitSpecifier::isEquivalent(const ExplicitSpecifier Other) const {
1923 if ((getKind() != Other.getKind() ||
1924 getKind() == ExplicitSpecKind::Unresolved)) {
1925 if (getKind() == ExplicitSpecKind::Unresolved &&
1926 Other.getKind() == ExplicitSpecKind::Unresolved) {
1927 ODRHash SelfHash, OtherHash;
1928 SelfHash.AddStmt(getExpr());
1929 OtherHash.AddStmt(Other.getExpr());
1930 return SelfHash.CalculateHash() == OtherHash.CalculateHash();
1931 } else
1932 return false;
1933 }
1934 return true;
1935}
1936
1937ExplicitSpecifier ExplicitSpecifier::getFromDecl(FunctionDecl *Function) {
1938 switch (Function->getDeclKind()) {
1939 case Decl::Kind::CXXConstructor:
1940 return cast<CXXConstructorDecl>(Function)->getExplicitSpecifier();
1941 case Decl::Kind::CXXConversion:
1942 return cast<CXXConversionDecl>(Function)->getExplicitSpecifier();
1943 case Decl::Kind::CXXDeductionGuide:
1944 return cast<CXXDeductionGuideDecl>(Function)->getExplicitSpecifier();
1945 default:
1946 return {};
1947 }
1948}
1949
1950CXXDeductionGuideDecl *CXXDeductionGuideDecl::Create(
1951 ASTContext &C, DeclContext *DC, SourceLocation StartLoc,
1952 ExplicitSpecifier ES, const DeclarationNameInfo &NameInfo, QualType T,
1953 TypeSourceInfo *TInfo, SourceLocation EndLocation) {
1954 return new (C, DC) CXXDeductionGuideDecl(C, DC, StartLoc, ES, NameInfo, T,
1955 TInfo, EndLocation);
1956}
1957
1958CXXDeductionGuideDecl *CXXDeductionGuideDecl::CreateDeserialized(ASTContext &C,
1959 unsigned ID) {
1960 return new (C, ID) CXXDeductionGuideDecl(
1961 C, nullptr, SourceLocation(), ExplicitSpecifier(), DeclarationNameInfo(),
1962 QualType(), nullptr, SourceLocation());
1963}
1964
1965void CXXMethodDecl::anchor() {}
1966
1967bool CXXMethodDecl::isStatic() const {
1968 const CXXMethodDecl *MD = getCanonicalDecl();
1969
1970 if (MD->getStorageClass() == SC_Static)
1971 return true;
1972
1973 OverloadedOperatorKind OOK = getDeclName().getCXXOverloadedOperator();
1974 return isStaticOverloadedOperator(OOK);
1975}
1976
1977static bool recursivelyOverrides(const CXXMethodDecl *DerivedMD,
1978 const CXXMethodDecl *BaseMD) {
1979 for (const CXXMethodDecl *MD : DerivedMD->overridden_methods()) {
1980 if (MD->getCanonicalDecl() == BaseMD->getCanonicalDecl())
1981 return true;
1982 if (recursivelyOverrides(MD, BaseMD))
1983 return true;
1984 }
1985 return false;
1986}
1987
1988CXXMethodDecl *
1989CXXMethodDecl::getCorrespondingMethodDeclaredInClass(const CXXRecordDecl *RD,
1990 bool MayBeBase) {
1991 if (this->getParent()->getCanonicalDecl() == RD->getCanonicalDecl())
1992 return this;
1993
1994 // Lookup doesn't work for destructors, so handle them separately.
1995 if (isa<CXXDestructorDecl>(this)) {
1996 CXXMethodDecl *MD = RD->getDestructor();
1997 if (MD) {
1998 if (recursivelyOverrides(MD, this))
1999 return MD;
2000 if (MayBeBase && recursivelyOverrides(this, MD))
2001 return MD;
2002 }
2003 return nullptr;
2004 }
2005
2006 for (auto *ND : RD->lookup(getDeclName())) {
2007 auto *MD = dyn_cast<CXXMethodDecl>(ND);
2008 if (!MD)
2009 continue;
2010 if (recursivelyOverrides(MD, this))
2011 return MD;
2012 if (MayBeBase && recursivelyOverrides(this, MD))
2013 return MD;
2014 }
2015
2016 return nullptr;
2017}
2018
2019CXXMethodDecl *
2020CXXMethodDecl::getCorrespondingMethodInClass(const CXXRecordDecl *RD,
2021 bool MayBeBase) {
2022 if (auto *MD = getCorrespondingMethodDeclaredInClass(RD, MayBeBase))
2023 return MD;
2024
2025 for (const auto &I : RD->bases()) {
2026 const RecordType *RT = I.getType()->getAs<RecordType>();
2027 if (!RT)
2028 continue;
2029 const auto *Base = cast<CXXRecordDecl>(RT->getDecl());
2030 CXXMethodDecl *T = this->getCorrespondingMethodInClass(Base);
2031 if (T)
2032 return T;
2033 }
2034
2035 return nullptr;
2036}
2037
2038CXXMethodDecl *CXXMethodDecl::Create(ASTContext &C, CXXRecordDecl *RD,
2039 SourceLocation StartLoc,
2040 const DeclarationNameInfo &NameInfo,
2041 QualType T, TypeSourceInfo *TInfo,
2042 StorageClass SC, bool isInline,
2043 ConstexprSpecKind ConstexprKind,
2044 SourceLocation EndLocation) {
2045 return new (C, RD)
2046 CXXMethodDecl(CXXMethod, C, RD, StartLoc, NameInfo, T, TInfo, SC,
2047 isInline, ConstexprKind, EndLocation);
2048}
2049
2050CXXMethodDecl *CXXMethodDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2051 return new (C, ID) CXXMethodDecl(
2052 CXXMethod, C, nullptr, SourceLocation(), DeclarationNameInfo(),
2053 QualType(), nullptr, SC_None, false, CSK_unspecified, SourceLocation());
2054}
2055
2056CXXMethodDecl *CXXMethodDecl::getDevirtualizedMethod(const Expr *Base,
2057 bool IsAppleKext) {
2058 assert(isVirtual() && "this method is expected to be virtual")((isVirtual() && "this method is expected to be virtual"
) ? static_cast<void> (0) : __assert_fail ("isVirtual() && \"this method is expected to be virtual\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2058, __PRETTY_FUNCTION__))
;
2059
2060 // When building with -fapple-kext, all calls must go through the vtable since
2061 // the kernel linker can do runtime patching of vtables.
2062 if (IsAppleKext)
2063 return nullptr;
2064
2065 // If the member function is marked 'final', we know that it can't be
2066 // overridden and can therefore devirtualize it unless it's pure virtual.
2067 if (hasAttr<FinalAttr>())
2068 return isPure() ? nullptr : this;
2069
2070 // If Base is unknown, we cannot devirtualize.
2071 if (!Base)
2072 return nullptr;
2073
2074 // If the base expression (after skipping derived-to-base conversions) is a
2075 // class prvalue, then we can devirtualize.
2076 Base = Base->getBestDynamicClassTypeExpr();
2077 if (Base->isRValue() && Base->getType()->isRecordType())
2078 return this;
2079
2080 // If we don't even know what we would call, we can't devirtualize.
2081 const CXXRecordDecl *BestDynamicDecl = Base->getBestDynamicClassType();
2082 if (!BestDynamicDecl)
2083 return nullptr;
2084
2085 // There may be a method corresponding to MD in a derived class.
2086 CXXMethodDecl *DevirtualizedMethod =
2087 getCorrespondingMethodInClass(BestDynamicDecl);
2088
2089 // If that method is pure virtual, we can't devirtualize. If this code is
2090 // reached, the result would be UB, not a direct call to the derived class
2091 // function, and we can't assume the derived class function is defined.
2092 if (DevirtualizedMethod->isPure())
2093 return nullptr;
2094
2095 // If that method is marked final, we can devirtualize it.
2096 if (DevirtualizedMethod->hasAttr<FinalAttr>())
2097 return DevirtualizedMethod;
2098
2099 // Similarly, if the class itself or its destructor is marked 'final',
2100 // the class can't be derived from and we can therefore devirtualize the
2101 // member function call.
2102 if (BestDynamicDecl->hasAttr<FinalAttr>())
2103 return DevirtualizedMethod;
2104 if (const auto *dtor = BestDynamicDecl->getDestructor()) {
2105 if (dtor->hasAttr<FinalAttr>())
2106 return DevirtualizedMethod;
2107 }
2108
2109 if (const auto *DRE = dyn_cast<DeclRefExpr>(Base)) {
2110 if (const auto *VD = dyn_cast<VarDecl>(DRE->getDecl()))
2111 if (VD->getType()->isRecordType())
2112 // This is a record decl. We know the type and can devirtualize it.
2113 return DevirtualizedMethod;
2114
2115 return nullptr;
2116 }
2117
2118 // We can devirtualize calls on an object accessed by a class member access
2119 // expression, since by C++11 [basic.life]p6 we know that it can't refer to
2120 // a derived class object constructed in the same location.
2121 if (const auto *ME = dyn_cast<MemberExpr>(Base)) {
2122 const ValueDecl *VD = ME->getMemberDecl();
2123 return VD->getType()->isRecordType() ? DevirtualizedMethod : nullptr;
2124 }
2125
2126 // Likewise for calls on an object accessed by a (non-reference) pointer to
2127 // member access.
2128 if (auto *BO = dyn_cast<BinaryOperator>(Base)) {
2129 if (BO->isPtrMemOp()) {
2130 auto *MPT = BO->getRHS()->getType()->castAs<MemberPointerType>();
2131 if (MPT->getPointeeType()->isRecordType())
2132 return DevirtualizedMethod;
2133 }
2134 }
2135
2136 // We can't devirtualize the call.
2137 return nullptr;
2138}
2139
2140bool CXXMethodDecl::isUsualDeallocationFunction(
2141 SmallVectorImpl<const FunctionDecl *> &PreventedBy) const {
2142 assert(PreventedBy.empty() && "PreventedBy is expected to be empty")((PreventedBy.empty() && "PreventedBy is expected to be empty"
) ? static_cast<void> (0) : __assert_fail ("PreventedBy.empty() && \"PreventedBy is expected to be empty\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2142, __PRETTY_FUNCTION__))
;
2143 if (getOverloadedOperator() != OO_Delete &&
2144 getOverloadedOperator() != OO_Array_Delete)
2145 return false;
2146
2147 // C++ [basic.stc.dynamic.deallocation]p2:
2148 // A template instance is never a usual deallocation function,
2149 // regardless of its signature.
2150 if (getPrimaryTemplate())
2151 return false;
2152
2153 // C++ [basic.stc.dynamic.deallocation]p2:
2154 // If a class T has a member deallocation function named operator delete
2155 // with exactly one parameter, then that function is a usual (non-placement)
2156 // deallocation function. [...]
2157 if (getNumParams() == 1)
2158 return true;
2159 unsigned UsualParams = 1;
2160
2161 // C++ P0722:
2162 // A destroying operator delete is a usual deallocation function if
2163 // removing the std::destroying_delete_t parameter and changing the
2164 // first parameter type from T* to void* results in the signature of
2165 // a usual deallocation function.
2166 if (isDestroyingOperatorDelete())
2167 ++UsualParams;
2168
2169 // C++ <=14 [basic.stc.dynamic.deallocation]p2:
2170 // [...] If class T does not declare such an operator delete but does
2171 // declare a member deallocation function named operator delete with
2172 // exactly two parameters, the second of which has type std::size_t (18.1),
2173 // then this function is a usual deallocation function.
2174 //
2175 // C++17 says a usual deallocation function is one with the signature
2176 // (void* [, size_t] [, std::align_val_t] [, ...])
2177 // and all such functions are usual deallocation functions. It's not clear
2178 // that allowing varargs functions was intentional.
2179 ASTContext &Context = getASTContext();
2180 if (UsualParams < getNumParams() &&
2181 Context.hasSameUnqualifiedType(getParamDecl(UsualParams)->getType(),
2182 Context.getSizeType()))
2183 ++UsualParams;
2184
2185 if (UsualParams < getNumParams() &&
2186 getParamDecl(UsualParams)->getType()->isAlignValT())
2187 ++UsualParams;
2188
2189 if (UsualParams != getNumParams())
2190 return false;
2191
2192 // In C++17 onwards, all potential usual deallocation functions are actual
2193 // usual deallocation functions. Honor this behavior when post-C++14
2194 // deallocation functions are offered as extensions too.
2195 // FIXME(EricWF): Destrying Delete should be a language option. How do we
2196 // handle when destroying delete is used prior to C++17?
2197 if (Context.getLangOpts().CPlusPlus17 ||
2198 Context.getLangOpts().AlignedAllocation ||
2199 isDestroyingOperatorDelete())
2200 return true;
2201
2202 // This function is a usual deallocation function if there are no
2203 // single-parameter deallocation functions of the same kind.
2204 DeclContext::lookup_result R = getDeclContext()->lookup(getDeclName());
2205 bool Result = true;
2206 for (const auto *D : R) {
2207 if (const auto *FD = dyn_cast<FunctionDecl>(D)) {
2208 if (FD->getNumParams() == 1) {
2209 PreventedBy.push_back(FD);
2210 Result = false;
2211 }
2212 }
2213 }
2214 return Result;
2215}
2216
2217bool CXXMethodDecl::isCopyAssignmentOperator() const {
2218 // C++0x [class.copy]p17:
2219 // A user-declared copy assignment operator X::operator= is a non-static
2220 // non-template member function of class X with exactly one parameter of
2221 // type X, X&, const X&, volatile X& or const volatile X&.
2222 if (/*operator=*/getOverloadedOperator() != OO_Equal ||
2223 /*non-static*/ isStatic() ||
2224 /*non-template*/getPrimaryTemplate() || getDescribedFunctionTemplate() ||
2225 getNumParams() != 1)
2226 return false;
2227
2228 QualType ParamType = getParamDecl(0)->getType();
2229 if (const auto *Ref = ParamType->getAs<LValueReferenceType>())
2230 ParamType = Ref->getPointeeType();
2231
2232 ASTContext &Context = getASTContext();
2233 QualType ClassType
2234 = Context.getCanonicalType(Context.getTypeDeclType(getParent()));
2235 return Context.hasSameUnqualifiedType(ClassType, ParamType);
2236}
2237
2238bool CXXMethodDecl::isMoveAssignmentOperator() const {
2239 // C++0x [class.copy]p19:
2240 // A user-declared move assignment operator X::operator= is a non-static
2241 // non-template member function of class X with exactly one parameter of type
2242 // X&&, const X&&, volatile X&&, or const volatile X&&.
2243 if (getOverloadedOperator() != OO_Equal || isStatic() ||
2244 getPrimaryTemplate() || getDescribedFunctionTemplate() ||
2245 getNumParams() != 1)
2246 return false;
2247
2248 QualType ParamType = getParamDecl(0)->getType();
2249 if (!isa<RValueReferenceType>(ParamType))
2250 return false;
2251 ParamType = ParamType->getPointeeType();
2252
2253 ASTContext &Context = getASTContext();
2254 QualType ClassType
2255 = Context.getCanonicalType(Context.getTypeDeclType(getParent()));
2256 return Context.hasSameUnqualifiedType(ClassType, ParamType);
2257}
2258
2259void CXXMethodDecl::addOverriddenMethod(const CXXMethodDecl *MD) {
2260 assert(MD->isCanonicalDecl() && "Method is not canonical!")((MD->isCanonicalDecl() && "Method is not canonical!"
) ? static_cast<void> (0) : __assert_fail ("MD->isCanonicalDecl() && \"Method is not canonical!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2260, __PRETTY_FUNCTION__))
;
2261 assert(!MD->getParent()->isDependentContext() &&((!MD->getParent()->isDependentContext() && "Can't add an overridden method to a class template!"
) ? static_cast<void> (0) : __assert_fail ("!MD->getParent()->isDependentContext() && \"Can't add an overridden method to a class template!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2262, __PRETTY_FUNCTION__))
2262 "Can't add an overridden method to a class template!")((!MD->getParent()->isDependentContext() && "Can't add an overridden method to a class template!"
) ? static_cast<void> (0) : __assert_fail ("!MD->getParent()->isDependentContext() && \"Can't add an overridden method to a class template!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2262, __PRETTY_FUNCTION__))
;
2263 assert(MD->isVirtual() && "Method is not virtual!")((MD->isVirtual() && "Method is not virtual!") ? static_cast
<void> (0) : __assert_fail ("MD->isVirtual() && \"Method is not virtual!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2263, __PRETTY_FUNCTION__))
;
2264
2265 getASTContext().addOverriddenMethod(this, MD);
2266}
2267
2268CXXMethodDecl::method_iterator CXXMethodDecl::begin_overridden_methods() const {
2269 if (isa<CXXConstructorDecl>(this)) return nullptr;
2270 return getASTContext().overridden_methods_begin(this);
2271}
2272
2273CXXMethodDecl::method_iterator CXXMethodDecl::end_overridden_methods() const {
2274 if (isa<CXXConstructorDecl>(this)) return nullptr;
2275 return getASTContext().overridden_methods_end(this);
2276}
2277
2278unsigned CXXMethodDecl::size_overridden_methods() const {
2279 if (isa<CXXConstructorDecl>(this)) return 0;
2280 return getASTContext().overridden_methods_size(this);
2281}
2282
2283CXXMethodDecl::overridden_method_range
2284CXXMethodDecl::overridden_methods() const {
2285 if (isa<CXXConstructorDecl>(this))
2286 return overridden_method_range(nullptr, nullptr);
2287 return getASTContext().overridden_methods(this);
2288}
2289
2290static QualType getThisObjectType(ASTContext &C, const FunctionProtoType *FPT,
2291 const CXXRecordDecl *Decl) {
2292 QualType ClassTy = C.getTypeDeclType(Decl);
2293 return C.getQualifiedType(ClassTy, FPT->getMethodQuals());
2294}
2295
2296QualType CXXMethodDecl::getThisType(const FunctionProtoType *FPT,
2297 const CXXRecordDecl *Decl) {
2298 ASTContext &C = Decl->getASTContext();
2299 QualType ObjectTy = ::getThisObjectType(C, FPT, Decl);
2300 return C.getPointerType(ObjectTy);
2301}
2302
2303QualType CXXMethodDecl::getThisObjectType(const FunctionProtoType *FPT,
2304 const CXXRecordDecl *Decl) {
2305 ASTContext &C = Decl->getASTContext();
2306 return ::getThisObjectType(C, FPT, Decl);
2307}
2308
2309QualType CXXMethodDecl::getThisType() const {
2310 // C++ 9.3.2p1: The type of this in a member function of a class X is X*.
2311 // If the member function is declared const, the type of this is const X*,
2312 // if the member function is declared volatile, the type of this is
2313 // volatile X*, and if the member function is declared const volatile,
2314 // the type of this is const volatile X*.
2315 assert(isInstance() && "No 'this' for static methods!")((isInstance() && "No 'this' for static methods!") ? static_cast
<void> (0) : __assert_fail ("isInstance() && \"No 'this' for static methods!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2315, __PRETTY_FUNCTION__))
;
2316
2317 return CXXMethodDecl::getThisType(getType()->getAs<FunctionProtoType>(),
2318 getParent());
2319}
2320
2321QualType CXXMethodDecl::getThisObjectType() const {
2322 // Ditto getThisType.
2323 assert(isInstance() && "No 'this' for static methods!")((isInstance() && "No 'this' for static methods!") ? static_cast
<void> (0) : __assert_fail ("isInstance() && \"No 'this' for static methods!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2323, __PRETTY_FUNCTION__))
;
2324
2325 return CXXMethodDecl::getThisObjectType(getType()->getAs<FunctionProtoType>(),
2326 getParent());
2327}
2328
2329bool CXXMethodDecl::hasInlineBody() const {
2330 // If this function is a template instantiation, look at the template from
2331 // which it was instantiated.
2332 const FunctionDecl *CheckFn = getTemplateInstantiationPattern();
2333 if (!CheckFn)
2334 CheckFn = this;
2335
2336 const FunctionDecl *fn;
2337 return CheckFn->isDefined(fn) && !fn->isOutOfLine() &&
2338 (fn->doesThisDeclarationHaveABody() || fn->willHaveBody());
2339}
2340
2341bool CXXMethodDecl::isLambdaStaticInvoker() const {
2342 const CXXRecordDecl *P = getParent();
2343 if (P->isLambda()) {
2344 if (const CXXMethodDecl *StaticInvoker = P->getLambdaStaticInvoker()) {
2345 if (StaticInvoker == this) return true;
2346 if (P->isGenericLambda() && this->isFunctionTemplateSpecialization())
2347 return StaticInvoker == this->getPrimaryTemplate()->getTemplatedDecl();
2348 }
2349 }
2350 return false;
2351}
2352
2353CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
2354 TypeSourceInfo *TInfo, bool IsVirtual,
2355 SourceLocation L, Expr *Init,
2356 SourceLocation R,
2357 SourceLocation EllipsisLoc)
2358 : Initializee(TInfo), MemberOrEllipsisLocation(EllipsisLoc), Init(Init),
2359 LParenLoc(L), RParenLoc(R), IsDelegating(false), IsVirtual(IsVirtual),
2360 IsWritten(false), SourceOrder(0) {}
2361
2362CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
2363 FieldDecl *Member,
2364 SourceLocation MemberLoc,
2365 SourceLocation L, Expr *Init,
2366 SourceLocation R)
2367 : Initializee(Member), MemberOrEllipsisLocation(MemberLoc), Init(Init),
2368 LParenLoc(L), RParenLoc(R), IsDelegating(false), IsVirtual(false),
2369 IsWritten(false), SourceOrder(0) {}
2370
2371CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
2372 IndirectFieldDecl *Member,
2373 SourceLocation MemberLoc,
2374 SourceLocation L, Expr *Init,
2375 SourceLocation R)
2376 : Initializee(Member), MemberOrEllipsisLocation(MemberLoc), Init(Init),
2377 LParenLoc(L), RParenLoc(R), IsDelegating(false), IsVirtual(false),
2378 IsWritten(false), SourceOrder(0) {}
2379
2380CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
2381 TypeSourceInfo *TInfo,
2382 SourceLocation L, Expr *Init,
2383 SourceLocation R)
2384 : Initializee(TInfo), Init(Init), LParenLoc(L), RParenLoc(R),
2385 IsDelegating(true), IsVirtual(false), IsWritten(false), SourceOrder(0) {}
2386
2387int64_t CXXCtorInitializer::getID(const ASTContext &Context) const {
2388 return Context.getAllocator()
2389 .identifyKnownAlignedObject<CXXCtorInitializer>(this);
2390}
2391
2392TypeLoc CXXCtorInitializer::getBaseClassLoc() const {
2393 if (isBaseInitializer())
2394 return Initializee.get<TypeSourceInfo*>()->getTypeLoc();
2395 else
2396 return {};
2397}
2398
2399const Type *CXXCtorInitializer::getBaseClass() const {
2400 if (isBaseInitializer())
2401 return Initializee.get<TypeSourceInfo*>()->getType().getTypePtr();
2402 else
2403 return nullptr;
2404}
2405
2406SourceLocation CXXCtorInitializer::getSourceLocation() const {
2407 if (isInClassMemberInitializer())
2408 return getAnyMember()->getLocation();
2409
2410 if (isAnyMemberInitializer())
2411 return getMemberLocation();
2412
2413 if (const auto *TSInfo = Initializee.get<TypeSourceInfo *>())
2414 return TSInfo->getTypeLoc().getLocalSourceRange().getBegin();
2415
2416 return {};
2417}
2418
2419SourceRange CXXCtorInitializer::getSourceRange() const {
2420 if (isInClassMemberInitializer()) {
2421 FieldDecl *D = getAnyMember();
2422 if (Expr *I = D->getInClassInitializer())
2423 return I->getSourceRange();
2424 return {};
2425 }
2426
2427 return SourceRange(getSourceLocation(), getRParenLoc());
2428}
2429
2430CXXConstructorDecl::CXXConstructorDecl(
2431 ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
2432 const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo,
2433 ExplicitSpecifier ES, bool isInline, bool isImplicitlyDeclared,
2434 ConstexprSpecKind ConstexprKind, InheritedConstructor Inherited)
2435 : CXXMethodDecl(CXXConstructor, C, RD, StartLoc, NameInfo, T, TInfo,
2436 SC_None, isInline, ConstexprKind, SourceLocation()) {
2437 setNumCtorInitializers(0);
2438 setInheritingConstructor(static_cast<bool>(Inherited));
2439 setImplicit(isImplicitlyDeclared);
2440 CXXConstructorDeclBits.HasTrailingExplicitSpecifier = ES.getExpr() ? 1 : 0;
2441 if (Inherited)
2442 *getTrailingObjects<InheritedConstructor>() = Inherited;
2443 setExplicitSpecifier(ES);
2444}
2445
2446void CXXConstructorDecl::anchor() {}
2447
2448CXXConstructorDecl *CXXConstructorDecl::CreateDeserialized(ASTContext &C,
2449 unsigned ID,
2450 uint64_t AllocKind) {
2451 bool hasTraillingExplicit = static_cast<bool>(AllocKind & TAKHasTailExplicit);
2452 bool isInheritingConstructor =
2453 static_cast<bool>(AllocKind & TAKInheritsConstructor);
2454 unsigned Extra =
2455 additionalSizeToAlloc<InheritedConstructor, ExplicitSpecifier>(
2456 isInheritingConstructor, hasTraillingExplicit);
2457 auto *Result = new (C, ID, Extra)
2458 CXXConstructorDecl(C, nullptr, SourceLocation(), DeclarationNameInfo(),
2459 QualType(), nullptr, ExplicitSpecifier(), false, false,
2460 CSK_unspecified, InheritedConstructor());
2461 Result->setInheritingConstructor(isInheritingConstructor);
2462 Result->CXXConstructorDeclBits.HasTrailingExplicitSpecifier =
2463 hasTraillingExplicit;
2464 Result->setExplicitSpecifier(ExplicitSpecifier());
2465 return Result;
2466}
2467
2468CXXConstructorDecl *CXXConstructorDecl::Create(
2469 ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
2470 const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo,
2471 ExplicitSpecifier ES, bool isInline, bool isImplicitlyDeclared,
2472 ConstexprSpecKind ConstexprKind, InheritedConstructor Inherited) {
2473 assert(NameInfo.getName().getNameKind()((NameInfo.getName().getNameKind() == DeclarationName::CXXConstructorName
&& "Name must refer to a constructor") ? static_cast
<void> (0) : __assert_fail ("NameInfo.getName().getNameKind() == DeclarationName::CXXConstructorName && \"Name must refer to a constructor\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2475, __PRETTY_FUNCTION__))
2474 == DeclarationName::CXXConstructorName &&((NameInfo.getName().getNameKind() == DeclarationName::CXXConstructorName
&& "Name must refer to a constructor") ? static_cast
<void> (0) : __assert_fail ("NameInfo.getName().getNameKind() == DeclarationName::CXXConstructorName && \"Name must refer to a constructor\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2475, __PRETTY_FUNCTION__))
2475 "Name must refer to a constructor")((NameInfo.getName().getNameKind() == DeclarationName::CXXConstructorName
&& "Name must refer to a constructor") ? static_cast
<void> (0) : __assert_fail ("NameInfo.getName().getNameKind() == DeclarationName::CXXConstructorName && \"Name must refer to a constructor\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2475, __PRETTY_FUNCTION__))
;
2476 unsigned Extra =
2477 additionalSizeToAlloc<InheritedConstructor, ExplicitSpecifier>(
2478 Inherited ? 1 : 0, ES.getExpr() ? 1 : 0);
2479 return new (C, RD, Extra)
2480 CXXConstructorDecl(C, RD, StartLoc, NameInfo, T, TInfo, ES, isInline,
2481 isImplicitlyDeclared, ConstexprKind, Inherited);
2482}
2483
2484CXXConstructorDecl::init_const_iterator CXXConstructorDecl::init_begin() const {
2485 return CtorInitializers.get(getASTContext().getExternalSource());
2486}
2487
2488CXXConstructorDecl *CXXConstructorDecl::getTargetConstructor() const {
2489 assert(isDelegatingConstructor() && "Not a delegating constructor!")((isDelegatingConstructor() && "Not a delegating constructor!"
) ? static_cast<void> (0) : __assert_fail ("isDelegatingConstructor() && \"Not a delegating constructor!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2489, __PRETTY_FUNCTION__))
;
2490 Expr *E = (*init_begin())->getInit()->IgnoreImplicit();
2491 if (const auto *Construct = dyn_cast<CXXConstructExpr>(E))
2492 return Construct->getConstructor();
2493
2494 return nullptr;
2495}
2496
2497bool CXXConstructorDecl::isDefaultConstructor() const {
2498 // C++ [class.ctor]p5:
2499 // A default constructor for a class X is a constructor of class
2500 // X that can be called without an argument.
2501 return (getNumParams() == 0) ||
2502 (getNumParams() > 0 && getParamDecl(0)->hasDefaultArg());
2503}
2504
2505bool
2506CXXConstructorDecl::isCopyConstructor(unsigned &TypeQuals) const {
2507 return isCopyOrMoveConstructor(TypeQuals) &&
2508 getParamDecl(0)->getType()->isLValueReferenceType();
2509}
2510
2511bool CXXConstructorDecl::isMoveConstructor(unsigned &TypeQuals) const {
2512 return isCopyOrMoveConstructor(TypeQuals) &&
2513 getParamDecl(0)->getType()->isRValueReferenceType();
2514}
2515
2516/// Determine whether this is a copy or move constructor.
2517bool CXXConstructorDecl::isCopyOrMoveConstructor(unsigned &TypeQuals) const {
2518 // C++ [class.copy]p2:
2519 // A non-template constructor for class X is a copy constructor
2520 // if its first parameter is of type X&, const X&, volatile X& or
2521 // const volatile X&, and either there are no other parameters
2522 // or else all other parameters have default arguments (8.3.6).
2523 // C++0x [class.copy]p3:
2524 // A non-template constructor for class X is a move constructor if its
2525 // first parameter is of type X&&, const X&&, volatile X&&, or
2526 // const volatile X&&, and either there are no other parameters or else
2527 // all other parameters have default arguments.
2528 if ((getNumParams() < 1) ||
2529 (getNumParams() > 1 && !getParamDecl(1)->hasDefaultArg()) ||
2530 (getPrimaryTemplate() != nullptr) ||
2531 (getDescribedFunctionTemplate() != nullptr))
2532 return false;
2533
2534 const ParmVarDecl *Param = getParamDecl(0);
2535
2536 // Do we have a reference type?
2537 const auto *ParamRefType = Param->getType()->getAs<ReferenceType>();
2538 if (!ParamRefType)
2539 return false;
2540
2541 // Is it a reference to our class type?
2542 ASTContext &Context = getASTContext();
2543
2544 CanQualType PointeeType
2545 = Context.getCanonicalType(ParamRefType->getPointeeType());
2546 CanQualType ClassTy
2547 = Context.getCanonicalType(Context.getTagDeclType(getParent()));
2548 if (PointeeType.getUnqualifiedType() != ClassTy)
2549 return false;
2550
2551 // FIXME: other qualifiers?
2552
2553 // We have a copy or move constructor.
2554 TypeQuals = PointeeType.getCVRQualifiers();
2555 return true;
2556}
2557
2558bool CXXConstructorDecl::isConvertingConstructor(bool AllowExplicit) const {
2559 // C++ [class.conv.ctor]p1:
2560 // A constructor declared without the function-specifier explicit
2561 // that can be called with a single parameter specifies a
2562 // conversion from the type of its first parameter to the type of
2563 // its class. Such a constructor is called a converting
2564 // constructor.
2565 if (isExplicit() && !AllowExplicit)
1
Calling 'CXXConstructorDecl::isExplicit'
6
Returning from 'CXXConstructorDecl::isExplicit'
2566 return false;
2567
2568 return (getNumParams() == 0 &&
7
Assuming the condition is true
2569 getType()->getAs<FunctionProtoType>()->isVariadic()) ||
8
Assuming the object is not a 'FunctionProtoType'
9
Called C++ object pointer is null
2570 (getNumParams() == 1) ||
2571 (getNumParams() > 1 &&
2572 (getParamDecl(1)->hasDefaultArg() ||
2573 getParamDecl(1)->isParameterPack()));
2574}
2575
2576bool CXXConstructorDecl::isSpecializationCopyingObject() const {
2577 if ((getNumParams() < 1) ||
2578 (getNumParams() > 1 && !getParamDecl(1)->hasDefaultArg()) ||
2579 (getDescribedFunctionTemplate() != nullptr))
2580 return false;
2581
2582 const ParmVarDecl *Param = getParamDecl(0);
2583
2584 ASTContext &Context = getASTContext();
2585 CanQualType ParamType = Context.getCanonicalType(Param->getType());
2586
2587 // Is it the same as our class type?
2588 CanQualType ClassTy
2589 = Context.getCanonicalType(Context.getTagDeclType(getParent()));
2590 if (ParamType.getUnqualifiedType() != ClassTy)
2591 return false;
2592
2593 return true;
2594}
2595
2596void CXXDestructorDecl::anchor() {}
2597
2598CXXDestructorDecl *
2599CXXDestructorDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2600 return new (C, ID)
2601 CXXDestructorDecl(C, nullptr, SourceLocation(), DeclarationNameInfo(),
2602 QualType(), nullptr, false, false, CSK_unspecified);
2603}
2604
2605CXXDestructorDecl *CXXDestructorDecl::Create(
2606 ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
2607 const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo,
2608 bool isInline, bool isImplicitlyDeclared, ConstexprSpecKind ConstexprKind) {
2609 assert(NameInfo.getName().getNameKind()((NameInfo.getName().getNameKind() == DeclarationName::CXXDestructorName
&& "Name must refer to a destructor") ? static_cast<
void> (0) : __assert_fail ("NameInfo.getName().getNameKind() == DeclarationName::CXXDestructorName && \"Name must refer to a destructor\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2611, __PRETTY_FUNCTION__))
2610 == DeclarationName::CXXDestructorName &&((NameInfo.getName().getNameKind() == DeclarationName::CXXDestructorName
&& "Name must refer to a destructor") ? static_cast<
void> (0) : __assert_fail ("NameInfo.getName().getNameKind() == DeclarationName::CXXDestructorName && \"Name must refer to a destructor\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2611, __PRETTY_FUNCTION__))
2611 "Name must refer to a destructor")((NameInfo.getName().getNameKind() == DeclarationName::CXXDestructorName
&& "Name must refer to a destructor") ? static_cast<
void> (0) : __assert_fail ("NameInfo.getName().getNameKind() == DeclarationName::CXXDestructorName && \"Name must refer to a destructor\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2611, __PRETTY_FUNCTION__))
;
2612 return new (C, RD)
2613 CXXDestructorDecl(C, RD, StartLoc, NameInfo, T, TInfo, isInline,
2614 isImplicitlyDeclared, ConstexprKind);
2615}
2616
2617void CXXDestructorDecl::setOperatorDelete(FunctionDecl *OD, Expr *ThisArg) {
2618 auto *First = cast<CXXDestructorDecl>(getFirstDecl());
2619 if (OD && !First->OperatorDelete) {
2620 First->OperatorDelete = OD;
2621 First->OperatorDeleteThisArg = ThisArg;
2622 if (auto *L = getASTMutationListener())
2623 L->ResolvedOperatorDelete(First, OD, ThisArg);
2624 }
2625}
2626
2627void CXXConversionDecl::anchor() {}
2628
2629CXXConversionDecl *
2630CXXConversionDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2631 return new (C, ID) CXXConversionDecl(
2632 C, nullptr, SourceLocation(), DeclarationNameInfo(), QualType(), nullptr,
2633 false, ExplicitSpecifier(), CSK_unspecified, SourceLocation());
2634}
2635
2636CXXConversionDecl *CXXConversionDecl::Create(
2637 ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
2638 const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo,
2639 bool isInline, ExplicitSpecifier ES, ConstexprSpecKind ConstexprKind,
2640 SourceLocation EndLocation) {
2641 assert(NameInfo.getName().getNameKind()((NameInfo.getName().getNameKind() == DeclarationName::CXXConversionFunctionName
&& "Name must refer to a conversion function") ? static_cast
<void> (0) : __assert_fail ("NameInfo.getName().getNameKind() == DeclarationName::CXXConversionFunctionName && \"Name must refer to a conversion function\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2643, __PRETTY_FUNCTION__))
2642 == DeclarationName::CXXConversionFunctionName &&((NameInfo.getName().getNameKind() == DeclarationName::CXXConversionFunctionName
&& "Name must refer to a conversion function") ? static_cast
<void> (0) : __assert_fail ("NameInfo.getName().getNameKind() == DeclarationName::CXXConversionFunctionName && \"Name must refer to a conversion function\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2643, __PRETTY_FUNCTION__))
2643 "Name must refer to a conversion function")((NameInfo.getName().getNameKind() == DeclarationName::CXXConversionFunctionName
&& "Name must refer to a conversion function") ? static_cast
<void> (0) : __assert_fail ("NameInfo.getName().getNameKind() == DeclarationName::CXXConversionFunctionName && \"Name must refer to a conversion function\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2643, __PRETTY_FUNCTION__))
;
2644 return new (C, RD)
2645 CXXConversionDecl(C, RD, StartLoc, NameInfo, T, TInfo, isInline, ES,
2646 ConstexprKind, EndLocation);
2647}
2648
2649bool CXXConversionDecl::isLambdaToBlockPointerConversion() const {
2650 return isImplicit() && getParent()->isLambda() &&
2651 getConversionType()->isBlockPointerType();
2652}
2653
2654LinkageSpecDecl::LinkageSpecDecl(DeclContext *DC, SourceLocation ExternLoc,
2655 SourceLocation LangLoc, LanguageIDs lang,
2656 bool HasBraces)
2657 : Decl(LinkageSpec, DC, LangLoc), DeclContext(LinkageSpec),
2658 ExternLoc(ExternLoc), RBraceLoc(SourceLocation()) {
2659 setLanguage(lang);
2660 LinkageSpecDeclBits.HasBraces = HasBraces;
2661}
2662
2663void LinkageSpecDecl::anchor() {}
2664
2665LinkageSpecDecl *LinkageSpecDecl::Create(ASTContext &C,
2666 DeclContext *DC,
2667 SourceLocation ExternLoc,
2668 SourceLocation LangLoc,
2669 LanguageIDs Lang,
2670 bool HasBraces) {
2671 return new (C, DC) LinkageSpecDecl(DC, ExternLoc, LangLoc, Lang, HasBraces);
2672}
2673
2674LinkageSpecDecl *LinkageSpecDecl::CreateDeserialized(ASTContext &C,
2675 unsigned ID) {
2676 return new (C, ID) LinkageSpecDecl(nullptr, SourceLocation(),
2677 SourceLocation(), lang_c, false);
2678}
2679
2680void UsingDirectiveDecl::anchor() {}
2681
2682UsingDirectiveDecl *UsingDirectiveDecl::Create(ASTContext &C, DeclContext *DC,
2683 SourceLocation L,
2684 SourceLocation NamespaceLoc,
2685 NestedNameSpecifierLoc QualifierLoc,
2686 SourceLocation IdentLoc,
2687 NamedDecl *Used,
2688 DeclContext *CommonAncestor) {
2689 if (auto *NS = dyn_cast_or_null<NamespaceDecl>(Used))
2690 Used = NS->getOriginalNamespace();
2691 return new (C, DC) UsingDirectiveDecl(DC, L, NamespaceLoc, QualifierLoc,
2692 IdentLoc, Used, CommonAncestor);
2693}
2694
2695UsingDirectiveDecl *UsingDirectiveDecl::CreateDeserialized(ASTContext &C,
2696 unsigned ID) {
2697 return new (C, ID) UsingDirectiveDecl(nullptr, SourceLocation(),
2698 SourceLocation(),
2699 NestedNameSpecifierLoc(),
2700 SourceLocation(), nullptr, nullptr);
2701}
2702
2703NamespaceDecl *UsingDirectiveDecl::getNominatedNamespace() {
2704 if (auto *NA = dyn_cast_or_null<NamespaceAliasDecl>(NominatedNamespace))
2705 return NA->getNamespace();
2706 return cast_or_null<NamespaceDecl>(NominatedNamespace);
2707}
2708
2709NamespaceDecl::NamespaceDecl(ASTContext &C, DeclContext *DC, bool Inline,
2710 SourceLocation StartLoc, SourceLocation IdLoc,
2711 IdentifierInfo *Id, NamespaceDecl *PrevDecl)
2712 : NamedDecl(Namespace, DC, IdLoc, Id), DeclContext(Namespace),
2713 redeclarable_base(C), LocStart(StartLoc),
2714 AnonOrFirstNamespaceAndInline(nullptr, Inline) {
2715 setPreviousDecl(PrevDecl);
2716
2717 if (PrevDecl)
2718 AnonOrFirstNamespaceAndInline.setPointer(PrevDecl->getOriginalNamespace());
2719}
2720
2721NamespaceDecl *NamespaceDecl::Create(ASTContext &C, DeclContext *DC,
2722 bool Inline, SourceLocation StartLoc,
2723 SourceLocation IdLoc, IdentifierInfo *Id,
2724 NamespaceDecl *PrevDecl) {
2725 return new (C, DC) NamespaceDecl(C, DC, Inline, StartLoc, IdLoc, Id,
2726 PrevDecl);
2727}
2728
2729NamespaceDecl *NamespaceDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2730 return new (C, ID) NamespaceDecl(C, nullptr, false, SourceLocation(),
2731 SourceLocation(), nullptr, nullptr);
2732}
2733
2734NamespaceDecl *NamespaceDecl::getOriginalNamespace() {
2735 if (isFirstDecl())
2736 return this;
2737
2738 return AnonOrFirstNamespaceAndInline.getPointer();
2739}
2740
2741const NamespaceDecl *NamespaceDecl::getOriginalNamespace() const {
2742 if (isFirstDecl())
2743 return this;
2744
2745 return AnonOrFirstNamespaceAndInline.getPointer();
2746}
2747
2748bool NamespaceDecl::isOriginalNamespace() const { return isFirstDecl(); }
2749
2750NamespaceDecl *NamespaceDecl::getNextRedeclarationImpl() {
2751 return getNextRedeclaration();
2752}
2753
2754NamespaceDecl *NamespaceDecl::getPreviousDeclImpl() {
2755 return getPreviousDecl();
2756}
2757
2758NamespaceDecl *NamespaceDecl::getMostRecentDeclImpl() {
2759 return getMostRecentDecl();
2760}
2761
2762void NamespaceAliasDecl::anchor() {}
2763
2764NamespaceAliasDecl *NamespaceAliasDecl::getNextRedeclarationImpl() {
2765 return getNextRedeclaration();
2766}
2767
2768NamespaceAliasDecl *NamespaceAliasDecl::getPreviousDeclImpl() {
2769 return getPreviousDecl();
2770}
2771
2772NamespaceAliasDecl *NamespaceAliasDecl::getMostRecentDeclImpl() {
2773 return getMostRecentDecl();
2774}
2775
2776NamespaceAliasDecl *NamespaceAliasDecl::Create(ASTContext &C, DeclContext *DC,
2777 SourceLocation UsingLoc,
2778 SourceLocation AliasLoc,
2779 IdentifierInfo *Alias,
2780 NestedNameSpecifierLoc QualifierLoc,
2781 SourceLocation IdentLoc,
2782 NamedDecl *Namespace) {
2783 // FIXME: Preserve the aliased namespace as written.
2784 if (auto *NS = dyn_cast_or_null<NamespaceDecl>(Namespace))
2785 Namespace = NS->getOriginalNamespace();
2786 return new (C, DC) NamespaceAliasDecl(C, DC, UsingLoc, AliasLoc, Alias,
2787 QualifierLoc, IdentLoc, Namespace);
2788}
2789
2790NamespaceAliasDecl *
2791NamespaceAliasDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2792 return new (C, ID) NamespaceAliasDecl(C, nullptr, SourceLocation(),
2793 SourceLocation(), nullptr,
2794 NestedNameSpecifierLoc(),
2795 SourceLocation(), nullptr);
2796}
2797
2798void UsingShadowDecl::anchor() {}
2799
2800UsingShadowDecl::UsingShadowDecl(Kind K, ASTContext &C, DeclContext *DC,
2801 SourceLocation Loc, UsingDecl *Using,
2802 NamedDecl *Target)
2803 : NamedDecl(K, DC, Loc, Using ? Using->getDeclName() : DeclarationName()),
2804 redeclarable_base(C), UsingOrNextShadow(cast<NamedDecl>(Using)) {
2805 if (Target)
2806 setTargetDecl(Target);
2807 setImplicit();
2808}
2809
2810UsingShadowDecl::UsingShadowDecl(Kind K, ASTContext &C, EmptyShell Empty)
2811 : NamedDecl(K, nullptr, SourceLocation(), DeclarationName()),
2812 redeclarable_base(C) {}
2813
2814UsingShadowDecl *
2815UsingShadowDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2816 return new (C, ID) UsingShadowDecl(UsingShadow, C, EmptyShell());
2817}
2818
2819UsingDecl *UsingShadowDecl::getUsingDecl() const {
2820 const UsingShadowDecl *Shadow = this;
2821 while (const auto *NextShadow =
2822 dyn_cast<UsingShadowDecl>(Shadow->UsingOrNextShadow))
2823 Shadow = NextShadow;
2824 return cast<UsingDecl>(Shadow->UsingOrNextShadow);
2825}
2826
2827void ConstructorUsingShadowDecl::anchor() {}
2828
2829ConstructorUsingShadowDecl *
2830ConstructorUsingShadowDecl::Create(ASTContext &C, DeclContext *DC,
2831 SourceLocation Loc, UsingDecl *Using,
2832 NamedDecl *Target, bool IsVirtual) {
2833 return new (C, DC) ConstructorUsingShadowDecl(C, DC, Loc, Using, Target,
2834 IsVirtual);
2835}
2836
2837ConstructorUsingShadowDecl *
2838ConstructorUsingShadowDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2839 return new (C, ID) ConstructorUsingShadowDecl(C, EmptyShell());
2840}
2841
2842CXXRecordDecl *ConstructorUsingShadowDecl::getNominatedBaseClass() const {
2843 return getUsingDecl()->getQualifier()->getAsRecordDecl();
2844}
2845
2846void UsingDecl::anchor() {}
2847
2848void UsingDecl::addShadowDecl(UsingShadowDecl *S) {
2849 assert(std::find(shadow_begin(), shadow_end(), S) == shadow_end() &&((std::find(shadow_begin(), shadow_end(), S) == shadow_end() &&
"declaration already in set") ? static_cast<void> (0) :
__assert_fail ("std::find(shadow_begin(), shadow_end(), S) == shadow_end() && \"declaration already in set\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2850, __PRETTY_FUNCTION__))
2850 "declaration already in set")((std::find(shadow_begin(), shadow_end(), S) == shadow_end() &&
"declaration already in set") ? static_cast<void> (0) :
__assert_fail ("std::find(shadow_begin(), shadow_end(), S) == shadow_end() && \"declaration already in set\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2850, __PRETTY_FUNCTION__))
;
2851 assert(S->getUsingDecl() == this)((S->getUsingDecl() == this) ? static_cast<void> (0)
: __assert_fail ("S->getUsingDecl() == this", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2851, __PRETTY_FUNCTION__))
;
2852
2853 if (FirstUsingShadow.getPointer())
2854 S->UsingOrNextShadow = FirstUsingShadow.getPointer();
2855 FirstUsingShadow.setPointer(S);
2856}
2857
2858void UsingDecl::removeShadowDecl(UsingShadowDecl *S) {
2859 assert(std::find(shadow_begin(), shadow_end(), S) != shadow_end() &&((std::find(shadow_begin(), shadow_end(), S) != shadow_end() &&
"declaration not in set") ? static_cast<void> (0) : __assert_fail
("std::find(shadow_begin(), shadow_end(), S) != shadow_end() && \"declaration not in set\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2860, __PRETTY_FUNCTION__))
2860 "declaration not in set")((std::find(shadow_begin(), shadow_end(), S) != shadow_end() &&
"declaration not in set") ? static_cast<void> (0) : __assert_fail
("std::find(shadow_begin(), shadow_end(), S) != shadow_end() && \"declaration not in set\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2860, __PRETTY_FUNCTION__))
;
2861 assert(S->getUsingDecl() == this)((S->getUsingDecl() == this) ? static_cast<void> (0)
: __assert_fail ("S->getUsingDecl() == this", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2861, __PRETTY_FUNCTION__))
;
2862
2863 // Remove S from the shadow decl chain. This is O(n) but hopefully rare.
2864
2865 if (FirstUsingShadow.getPointer() == S) {
2866 FirstUsingShadow.setPointer(
2867 dyn_cast<UsingShadowDecl>(S->UsingOrNextShadow));
2868 S->UsingOrNextShadow = this;
2869 return;
2870 }
2871
2872 UsingShadowDecl *Prev = FirstUsingShadow.getPointer();
2873 while (Prev->UsingOrNextShadow != S)
2874 Prev = cast<UsingShadowDecl>(Prev->UsingOrNextShadow);
2875 Prev->UsingOrNextShadow = S->UsingOrNextShadow;
2876 S->UsingOrNextShadow = this;
2877}
2878
2879UsingDecl *UsingDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation UL,
2880 NestedNameSpecifierLoc QualifierLoc,
2881 const DeclarationNameInfo &NameInfo,
2882 bool HasTypename) {
2883 return new (C, DC) UsingDecl(DC, UL, QualifierLoc, NameInfo, HasTypename);
2884}
2885
2886UsingDecl *UsingDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2887 return new (C, ID) UsingDecl(nullptr, SourceLocation(),
2888 NestedNameSpecifierLoc(), DeclarationNameInfo(),
2889 false);
2890}
2891
2892SourceRange UsingDecl::getSourceRange() const {
2893 SourceLocation Begin = isAccessDeclaration()
2894 ? getQualifierLoc().getBeginLoc() : UsingLocation;
2895 return SourceRange(Begin, getNameInfo().getEndLoc());
2896}
2897
2898void UsingPackDecl::anchor() {}
2899
2900UsingPackDecl *UsingPackDecl::Create(ASTContext &C, DeclContext *DC,
2901 NamedDecl *InstantiatedFrom,
2902 ArrayRef<NamedDecl *> UsingDecls) {
2903 size_t Extra = additionalSizeToAlloc<NamedDecl *>(UsingDecls.size());
2904 return new (C, DC, Extra) UsingPackDecl(DC, InstantiatedFrom, UsingDecls);
2905}
2906
2907UsingPackDecl *UsingPackDecl::CreateDeserialized(ASTContext &C, unsigned ID,
2908 unsigned NumExpansions) {
2909 size_t Extra = additionalSizeToAlloc<NamedDecl *>(NumExpansions);
2910 auto *Result = new (C, ID, Extra) UsingPackDecl(nullptr, nullptr, None);
2911 Result->NumExpansions = NumExpansions;
2912 auto *Trail = Result->getTrailingObjects<NamedDecl *>();
2913 for (unsigned I = 0; I != NumExpansions; ++I)
2914 new (Trail + I) NamedDecl*(nullptr);
2915 return Result;
2916}
2917
2918void UnresolvedUsingValueDecl::anchor() {}
2919
2920UnresolvedUsingValueDecl *
2921UnresolvedUsingValueDecl::Create(ASTContext &C, DeclContext *DC,
2922 SourceLocation UsingLoc,
2923 NestedNameSpecifierLoc QualifierLoc,
2924 const DeclarationNameInfo &NameInfo,
2925 SourceLocation EllipsisLoc) {
2926 return new (C, DC) UnresolvedUsingValueDecl(DC, C.DependentTy, UsingLoc,
2927 QualifierLoc, NameInfo,
2928 EllipsisLoc);
2929}
2930
2931UnresolvedUsingValueDecl *
2932UnresolvedUsingValueDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2933 return new (C, ID) UnresolvedUsingValueDecl(nullptr, QualType(),
2934 SourceLocation(),
2935 NestedNameSpecifierLoc(),
2936 DeclarationNameInfo(),
2937 SourceLocation());
2938}
2939
2940SourceRange UnresolvedUsingValueDecl::getSourceRange() const {
2941 SourceLocation Begin = isAccessDeclaration()
2942 ? getQualifierLoc().getBeginLoc() : UsingLocation;
2943 return SourceRange(Begin, getNameInfo().getEndLoc());
2944}
2945
2946void UnresolvedUsingTypenameDecl::anchor() {}
2947
2948UnresolvedUsingTypenameDecl *
2949UnresolvedUsingTypenameDecl::Create(ASTContext &C, DeclContext *DC,
2950 SourceLocation UsingLoc,
2951 SourceLocation TypenameLoc,
2952 NestedNameSpecifierLoc QualifierLoc,
2953 SourceLocation TargetNameLoc,
2954 DeclarationName TargetName,
2955 SourceLocation EllipsisLoc) {
2956 return new (C, DC) UnresolvedUsingTypenameDecl(
2957 DC, UsingLoc, TypenameLoc, QualifierLoc, TargetNameLoc,
2958 TargetName.getAsIdentifierInfo(), EllipsisLoc);
2959}
2960
2961UnresolvedUsingTypenameDecl *
2962UnresolvedUsingTypenameDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2963 return new (C, ID) UnresolvedUsingTypenameDecl(
2964 nullptr, SourceLocation(), SourceLocation(), NestedNameSpecifierLoc(),
2965 SourceLocation(), nullptr, SourceLocation());
2966}
2967
2968void StaticAssertDecl::anchor() {}
2969
2970StaticAssertDecl *StaticAssertDecl::Create(ASTContext &C, DeclContext *DC,
2971 SourceLocation StaticAssertLoc,
2972 Expr *AssertExpr,
2973 StringLiteral *Message,
2974 SourceLocation RParenLoc,
2975 bool Failed) {
2976 return new (C, DC) StaticAssertDecl(DC, StaticAssertLoc, AssertExpr, Message,
2977 RParenLoc, Failed);
2978}
2979
2980StaticAssertDecl *StaticAssertDecl::CreateDeserialized(ASTContext &C,
2981 unsigned ID) {
2982 return new (C, ID) StaticAssertDecl(nullptr, SourceLocation(), nullptr,
2983 nullptr, SourceLocation(), false);
2984}
2985
2986void BindingDecl::anchor() {}
2987
2988BindingDecl *BindingDecl::Create(ASTContext &C, DeclContext *DC,
2989 SourceLocation IdLoc, IdentifierInfo *Id) {
2990 return new (C, DC) BindingDecl(DC, IdLoc, Id);
2991}
2992
2993BindingDecl *BindingDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2994 return new (C, ID) BindingDecl(nullptr, SourceLocation(), nullptr);
2995}
2996
2997ValueDecl *BindingDecl::getDecomposedDecl() const {
2998 ExternalASTSource *Source =
2999 Decomp.isOffset() ? getASTContext().getExternalSource() : nullptr;
3000 return cast_or_null<ValueDecl>(Decomp.get(Source));
3001}
3002
3003VarDecl *BindingDecl::getHoldingVar() const {
3004 Expr *B = getBinding();
3005 if (!B)
3006 return nullptr;
3007 auto *DRE = dyn_cast<DeclRefExpr>(B->IgnoreImplicit());
3008 if (!DRE)
3009 return nullptr;
3010
3011 auto *VD = dyn_cast<VarDecl>(DRE->getDecl());
3012 assert(VD->isImplicit() && "holding var for binding decl not implicit")((VD->isImplicit() && "holding var for binding decl not implicit"
) ? static_cast<void> (0) : __assert_fail ("VD->isImplicit() && \"holding var for binding decl not implicit\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 3012, __PRETTY_FUNCTION__))
;
3013 return VD;
3014}
3015
3016void DecompositionDecl::anchor() {}
3017
3018DecompositionDecl *DecompositionDecl::Create(ASTContext &C, DeclContext *DC,
3019 SourceLocation StartLoc,
3020 SourceLocation LSquareLoc,
3021 QualType T, TypeSourceInfo *TInfo,
3022 StorageClass SC,
3023 ArrayRef<BindingDecl *> Bindings) {
3024 size_t Extra = additionalSizeToAlloc<BindingDecl *>(Bindings.size());
3025 return new (C, DC, Extra)
3026 DecompositionDecl(C, DC, StartLoc, LSquareLoc, T, TInfo, SC, Bindings);
3027}
3028
3029DecompositionDecl *DecompositionDecl::CreateDeserialized(ASTContext &C,
3030 unsigned ID,
3031 unsigned NumBindings) {
3032 size_t Extra = additionalSizeToAlloc<BindingDecl *>(NumBindings);
3033 auto *Result = new (C, ID, Extra)
3034 DecompositionDecl(C, nullptr, SourceLocation(), SourceLocation(),
3035 QualType(), nullptr, StorageClass(), None);
3036 // Set up and clean out the bindings array.
3037 Result->NumBindings = NumBindings;
3038 auto *Trail = Result->getTrailingObjects<BindingDecl *>();
3039 for (unsigned I = 0; I != NumBindings; ++I)
3040 new (Trail + I) BindingDecl*(nullptr);
3041 return Result;
3042}
3043
3044void DecompositionDecl::printName(llvm::raw_ostream &os) const {
3045 os << '[';
3046 bool Comma = false;
3047 for (const auto *B : bindings()) {
3048 if (Comma)
3049 os << ", ";
3050 B->printName(os);
3051 Comma = true;
3052 }
3053 os << ']';
3054}
3055
3056void MSPropertyDecl::anchor() {}
3057
3058MSPropertyDecl *MSPropertyDecl::Create(ASTContext &C, DeclContext *DC,
3059 SourceLocation L, DeclarationName N,
3060 QualType T, TypeSourceInfo *TInfo,
3061 SourceLocation StartL,
3062 IdentifierInfo *Getter,
3063 IdentifierInfo *Setter) {
3064 return new (C, DC) MSPropertyDecl(DC, L, N, T, TInfo, StartL, Getter, Setter);
3065}
3066
3067MSPropertyDecl *MSPropertyDecl::CreateDeserialized(ASTContext &C,
3068 unsigned ID) {
3069 return new (C, ID) MSPropertyDecl(nullptr, SourceLocation(),
3070 DeclarationName(), QualType(), nullptr,
3071 SourceLocation(), nullptr, nullptr);
3072}
3073
3074static const char *getAccessName(AccessSpecifier AS) {
3075 switch (AS) {
3076 case AS_none:
3077 llvm_unreachable("Invalid access specifier!")::llvm::llvm_unreachable_internal("Invalid access specifier!"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 3077)
;
3078 case AS_public:
3079 return "public";
3080 case AS_private:
3081 return "private";
3082 case AS_protected:
3083 return "protected";
3084 }
3085 llvm_unreachable("Invalid access specifier!")::llvm::llvm_unreachable_internal("Invalid access specifier!"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 3085)
;
3086}
3087
3088const DiagnosticBuilder &clang::operator<<(const DiagnosticBuilder &DB,
3089 AccessSpecifier AS) {
3090 return DB << getAccessName(AS);
3091}
3092
3093const PartialDiagnostic &clang::operator<<(const PartialDiagnostic &DB,
3094 AccessSpecifier AS) {
3095 return DB << getAccessName(AS);
3096}

/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h

1//===- DeclCXX.h - Classes for representing C++ declarations --*- C++ -*-=====//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9/// \file
10/// Defines the C++ Decl subclasses, other than those for templates
11/// (found in DeclTemplate.h) and friends (in DeclFriend.h).
12//
13//===----------------------------------------------------------------------===//
14
15#ifndef LLVM_CLANG_AST_DECLCXX_H
16#define LLVM_CLANG_AST_DECLCXX_H
17
18#include "clang/AST/ASTContext.h"
19#include "clang/AST/ASTUnresolvedSet.h"
20#include "clang/AST/Attr.h"
21#include "clang/AST/Decl.h"
22#include "clang/AST/DeclBase.h"
23#include "clang/AST/DeclarationName.h"
24#include "clang/AST/Expr.h"
25#include "clang/AST/ExternalASTSource.h"
26#include "clang/AST/LambdaCapture.h"
27#include "clang/AST/NestedNameSpecifier.h"
28#include "clang/AST/Redeclarable.h"
29#include "clang/AST/Stmt.h"
30#include "clang/AST/Type.h"
31#include "clang/AST/TypeLoc.h"
32#include "clang/AST/UnresolvedSet.h"
33#include "clang/Basic/LLVM.h"
34#include "clang/Basic/Lambda.h"
35#include "clang/Basic/LangOptions.h"
36#include "clang/Basic/OperatorKinds.h"
37#include "clang/Basic/SourceLocation.h"
38#include "clang/Basic/Specifiers.h"
39#include "llvm/ADT/ArrayRef.h"
40#include "llvm/ADT/DenseMap.h"
41#include "llvm/ADT/PointerIntPair.h"
42#include "llvm/ADT/PointerUnion.h"
43#include "llvm/ADT/STLExtras.h"
44#include "llvm/ADT/iterator_range.h"
45#include "llvm/BinaryFormat/Dwarf.h"
46#include "llvm/Support/Casting.h"
47#include "llvm/Support/Compiler.h"
48#include "llvm/Support/PointerLikeTypeTraits.h"
49#include "llvm/Support/TrailingObjects.h"
50#include <cassert>
51#include <cstddef>
52#include <iterator>
53#include <memory>
54#include <vector>
55
56namespace clang {
57
58class ClassTemplateDecl;
59class ConstructorUsingShadowDecl;
60class CXXBasePath;
61class CXXBasePaths;
62class CXXConstructorDecl;
63class CXXDestructorDecl;
64class CXXFinalOverriderMap;
65class CXXIndirectPrimaryBaseSet;
66class CXXMethodDecl;
67class DecompositionDecl;
68class DiagnosticBuilder;
69class FriendDecl;
70class FunctionTemplateDecl;
71class IdentifierInfo;
72class MemberSpecializationInfo;
73class TemplateDecl;
74class TemplateParameterList;
75class UsingDecl;
76
77/// Represents an access specifier followed by colon ':'.
78///
79/// An objects of this class represents sugar for the syntactic occurrence
80/// of an access specifier followed by a colon in the list of member
81/// specifiers of a C++ class definition.
82///
83/// Note that they do not represent other uses of access specifiers,
84/// such as those occurring in a list of base specifiers.
85/// Also note that this class has nothing to do with so-called
86/// "access declarations" (C++98 11.3 [class.access.dcl]).
87class AccessSpecDecl : public Decl {
88 /// The location of the ':'.
89 SourceLocation ColonLoc;
90
91 AccessSpecDecl(AccessSpecifier AS, DeclContext *DC,
92 SourceLocation ASLoc, SourceLocation ColonLoc)
93 : Decl(AccessSpec, DC, ASLoc), ColonLoc(ColonLoc) {
94 setAccess(AS);
95 }
96
97 AccessSpecDecl(EmptyShell Empty) : Decl(AccessSpec, Empty) {}
98
99 virtual void anchor();
100
101public:
102 /// The location of the access specifier.
103 SourceLocation getAccessSpecifierLoc() const { return getLocation(); }
104
105 /// Sets the location of the access specifier.
106 void setAccessSpecifierLoc(SourceLocation ASLoc) { setLocation(ASLoc); }
107
108 /// The location of the colon following the access specifier.
109 SourceLocation getColonLoc() const { return ColonLoc; }
110
111 /// Sets the location of the colon.
112 void setColonLoc(SourceLocation CLoc) { ColonLoc = CLoc; }
113
114 SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) {
115 return SourceRange(getAccessSpecifierLoc(), getColonLoc());
116 }
117
118 static AccessSpecDecl *Create(ASTContext &C, AccessSpecifier AS,
119 DeclContext *DC, SourceLocation ASLoc,
120 SourceLocation ColonLoc) {
121 return new (C, DC) AccessSpecDecl(AS, DC, ASLoc, ColonLoc);
122 }
123
124 static AccessSpecDecl *CreateDeserialized(ASTContext &C, unsigned ID);
125
126 // Implement isa/cast/dyncast/etc.
127 static bool classof(const Decl *D) { return classofKind(D->getKind()); }
128 static bool classofKind(Kind K) { return K == AccessSpec; }
129};
130
131/// Represents a base class of a C++ class.
132///
133/// Each CXXBaseSpecifier represents a single, direct base class (or
134/// struct) of a C++ class (or struct). It specifies the type of that
135/// base class, whether it is a virtual or non-virtual base, and what
136/// level of access (public, protected, private) is used for the
137/// derivation. For example:
138///
139/// \code
140/// class A { };
141/// class B { };
142/// class C : public virtual A, protected B { };
143/// \endcode
144///
145/// In this code, C will have two CXXBaseSpecifiers, one for "public
146/// virtual A" and the other for "protected B".
147class CXXBaseSpecifier {
148 /// The source code range that covers the full base
149 /// specifier, including the "virtual" (if present) and access
150 /// specifier (if present).
151 SourceRange Range;
152
153 /// The source location of the ellipsis, if this is a pack
154 /// expansion.
155 SourceLocation EllipsisLoc;
156
157 /// Whether this is a virtual base class or not.
158 unsigned Virtual : 1;
159
160 /// Whether this is the base of a class (true) or of a struct (false).
161 ///
162 /// This determines the mapping from the access specifier as written in the
163 /// source code to the access specifier used for semantic analysis.
164 unsigned BaseOfClass : 1;
165
166 /// Access specifier as written in the source code (may be AS_none).
167 ///
168 /// The actual type of data stored here is an AccessSpecifier, but we use
169 /// "unsigned" here to work around a VC++ bug.
170 unsigned Access : 2;
171
172 /// Whether the class contains a using declaration
173 /// to inherit the named class's constructors.
174 unsigned InheritConstructors : 1;
175
176 /// The type of the base class.
177 ///
178 /// This will be a class or struct (or a typedef of such). The source code
179 /// range does not include the \c virtual or the access specifier.
180 TypeSourceInfo *BaseTypeInfo;
181
182public:
183 CXXBaseSpecifier() = default;
184 CXXBaseSpecifier(SourceRange R, bool V, bool BC, AccessSpecifier A,
185 TypeSourceInfo *TInfo, SourceLocation EllipsisLoc)
186 : Range(R), EllipsisLoc(EllipsisLoc), Virtual(V), BaseOfClass(BC),
187 Access(A), InheritConstructors(false), BaseTypeInfo(TInfo) {}
188
189 /// Retrieves the source range that contains the entire base specifier.
190 SourceRange getSourceRange() const LLVM_READONLY__attribute__((__pure__)) { return Range; }
191 SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return Range.getBegin(); }
192 SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return Range.getEnd(); }
193
194 /// Get the location at which the base class type was written.
195 SourceLocation getBaseTypeLoc() const LLVM_READONLY__attribute__((__pure__)) {
196 return BaseTypeInfo->getTypeLoc().getBeginLoc();
197 }
198
199 /// Determines whether the base class is a virtual base class (or not).
200 bool isVirtual() const { return Virtual; }
201
202 /// Determine whether this base class is a base of a class declared
203 /// with the 'class' keyword (vs. one declared with the 'struct' keyword).
204 bool isBaseOfClass() const { return BaseOfClass; }
205
206 /// Determine whether this base specifier is a pack expansion.
207 bool isPackExpansion() const { return EllipsisLoc.isValid(); }
208
209 /// Determine whether this base class's constructors get inherited.
210 bool getInheritConstructors() const { return InheritConstructors; }
211
212 /// Set that this base class's constructors should be inherited.
213 void setInheritConstructors(bool Inherit = true) {
214 InheritConstructors = Inherit;
215 }
216
217 /// For a pack expansion, determine the location of the ellipsis.
218 SourceLocation getEllipsisLoc() const {
219 return EllipsisLoc;
220 }
221
222 /// Returns the access specifier for this base specifier.
223 ///
224 /// This is the actual base specifier as used for semantic analysis, so
225 /// the result can never be AS_none. To retrieve the access specifier as
226 /// written in the source code, use getAccessSpecifierAsWritten().
227 AccessSpecifier getAccessSpecifier() const {
228 if ((AccessSpecifier)Access == AS_none)
229 return BaseOfClass? AS_private : AS_public;
230 else
231 return (AccessSpecifier)Access;
232 }
233
234 /// Retrieves the access specifier as written in the source code
235 /// (which may mean that no access specifier was explicitly written).
236 ///
237 /// Use getAccessSpecifier() to retrieve the access specifier for use in
238 /// semantic analysis.
239 AccessSpecifier getAccessSpecifierAsWritten() const {
240 return (AccessSpecifier)Access;
241 }
242
243 /// Retrieves the type of the base class.
244 ///
245 /// This type will always be an unqualified class type.
246 QualType getType() const {
247 return BaseTypeInfo->getType().getUnqualifiedType();
248 }
249
250 /// Retrieves the type and source location of the base class.
251 TypeSourceInfo *getTypeSourceInfo() const { return BaseTypeInfo; }
252};
253
254/// Represents a C++ struct/union/class.
255class CXXRecordDecl : public RecordDecl {
256 friend class ASTDeclReader;
257 friend class ASTDeclWriter;
258 friend class ASTNodeImporter;
259 friend class ASTReader;
260 friend class ASTRecordWriter;
261 friend class ASTWriter;
262 friend class DeclContext;
263 friend class LambdaExpr;
264
265 friend void FunctionDecl::setPure(bool);
266 friend void TagDecl::startDefinition();
267
268 /// Values used in DefinitionData fields to represent special members.
269 enum SpecialMemberFlags {
270 SMF_DefaultConstructor = 0x1,
271 SMF_CopyConstructor = 0x2,
272 SMF_MoveConstructor = 0x4,
273 SMF_CopyAssignment = 0x8,
274 SMF_MoveAssignment = 0x10,
275 SMF_Destructor = 0x20,
276 SMF_All = 0x3f
277 };
278
279 struct DefinitionData {
280 /// True if this class has any user-declared constructors.
281 unsigned UserDeclaredConstructor : 1;
282
283 /// The user-declared special members which this class has.
284 unsigned UserDeclaredSpecialMembers : 6;
285
286 /// True when this class is an aggregate.
287 unsigned Aggregate : 1;
288
289 /// True when this class is a POD-type.
290 unsigned PlainOldData : 1;
291
292 /// True when this class is empty for traits purposes, that is:
293 /// * has no data members other than 0-width bit-fields and empty fields
294 /// marked [[no_unique_address]]
295 /// * has no virtual function/base, and
296 /// * doesn't inherit from a non-empty class.
297 /// Doesn't take union-ness into account.
298 unsigned Empty : 1;
299
300 /// True when this class is polymorphic, i.e., has at
301 /// least one virtual member or derives from a polymorphic class.
302 unsigned Polymorphic : 1;
303
304 /// True when this class is abstract, i.e., has at least
305 /// one pure virtual function, (that can come from a base class).
306 unsigned Abstract : 1;
307
308 /// True when this class is standard-layout, per the applicable
309 /// language rules (including DRs).
310 unsigned IsStandardLayout : 1;
311
312 /// True when this class was standard-layout under the C++11
313 /// definition.
314 ///
315 /// C++11 [class]p7. A standard-layout class is a class that:
316 /// * has no non-static data members of type non-standard-layout class (or
317 /// array of such types) or reference,
318 /// * has no virtual functions (10.3) and no virtual base classes (10.1),
319 /// * has the same access control (Clause 11) for all non-static data
320 /// members
321 /// * has no non-standard-layout base classes,
322 /// * either has no non-static data members in the most derived class and at
323 /// most one base class with non-static data members, or has no base
324 /// classes with non-static data members, and
325 /// * has no base classes of the same type as the first non-static data
326 /// member.
327 unsigned IsCXX11StandardLayout : 1;
328
329 /// True when any base class has any declared non-static data
330 /// members or bit-fields.
331 /// This is a helper bit of state used to implement IsStandardLayout more
332 /// efficiently.
333 unsigned HasBasesWithFields : 1;
334
335 /// True when any base class has any declared non-static data
336 /// members.
337 /// This is a helper bit of state used to implement IsCXX11StandardLayout
338 /// more efficiently.
339 unsigned HasBasesWithNonStaticDataMembers : 1;
340
341 /// True when there are private non-static data members.
342 unsigned HasPrivateFields : 1;
343
344 /// True when there are protected non-static data members.
345 unsigned HasProtectedFields : 1;
346
347 /// True when there are private non-static data members.
348 unsigned HasPublicFields : 1;
349
350 /// True if this class (or any subobject) has mutable fields.
351 unsigned HasMutableFields : 1;
352
353 /// True if this class (or any nested anonymous struct or union)
354 /// has variant members.
355 unsigned HasVariantMembers : 1;
356
357 /// True if there no non-field members declared by the user.
358 unsigned HasOnlyCMembers : 1;
359
360 /// True if any field has an in-class initializer, including those
361 /// within anonymous unions or structs.
362 unsigned HasInClassInitializer : 1;
363
364 /// True if any field is of reference type, and does not have an
365 /// in-class initializer.
366 ///
367 /// In this case, value-initialization of this class is illegal in C++98
368 /// even if the class has a trivial default constructor.
369 unsigned HasUninitializedReferenceMember : 1;
370
371 /// True if any non-mutable field whose type doesn't have a user-
372 /// provided default ctor also doesn't have an in-class initializer.
373 unsigned HasUninitializedFields : 1;
374
375 /// True if there are any member using-declarations that inherit
376 /// constructors from a base class.
377 unsigned HasInheritedConstructor : 1;
378
379 /// True if there are any member using-declarations named
380 /// 'operator='.
381 unsigned HasInheritedAssignment : 1;
382
383 /// These flags are \c true if a defaulted corresponding special
384 /// member can't be fully analyzed without performing overload resolution.
385 /// @{
386 unsigned NeedOverloadResolutionForCopyConstructor : 1;
387 unsigned NeedOverloadResolutionForMoveConstructor : 1;
388 unsigned NeedOverloadResolutionForMoveAssignment : 1;
389 unsigned NeedOverloadResolutionForDestructor : 1;
390 /// @}
391
392 /// These flags are \c true if an implicit defaulted corresponding
393 /// special member would be defined as deleted.
394 /// @{
395 unsigned DefaultedCopyConstructorIsDeleted : 1;
396 unsigned DefaultedMoveConstructorIsDeleted : 1;
397 unsigned DefaultedMoveAssignmentIsDeleted : 1;
398 unsigned DefaultedDestructorIsDeleted : 1;
399 /// @}
400
401 /// The trivial special members which this class has, per
402 /// C++11 [class.ctor]p5, C++11 [class.copy]p12, C++11 [class.copy]p25,
403 /// C++11 [class.dtor]p5, or would have if the member were not suppressed.
404 ///
405 /// This excludes any user-declared but not user-provided special members
406 /// which have been declared but not yet defined.
407 unsigned HasTrivialSpecialMembers : 6;
408
409 /// These bits keep track of the triviality of special functions for the
410 /// purpose of calls. Only the bits corresponding to SMF_CopyConstructor,
411 /// SMF_MoveConstructor, and SMF_Destructor are meaningful here.
412 unsigned HasTrivialSpecialMembersForCall : 6;
413
414 /// The declared special members of this class which are known to be
415 /// non-trivial.
416 ///
417 /// This excludes any user-declared but not user-provided special members
418 /// which have been declared but not yet defined, and any implicit special
419 /// members which have not yet been declared.
420 unsigned DeclaredNonTrivialSpecialMembers : 6;
421
422 /// These bits keep track of the declared special members that are
423 /// non-trivial for the purpose of calls.
424 /// Only the bits corresponding to SMF_CopyConstructor,
425 /// SMF_MoveConstructor, and SMF_Destructor are meaningful here.
426 unsigned DeclaredNonTrivialSpecialMembersForCall : 6;
427
428 /// True when this class has a destructor with no semantic effect.
429 unsigned HasIrrelevantDestructor : 1;
430
431 /// True when this class has at least one user-declared constexpr
432 /// constructor which is neither the copy nor move constructor.
433 unsigned HasConstexprNonCopyMoveConstructor : 1;
434
435 /// True if this class has a (possibly implicit) defaulted default
436 /// constructor.
437 unsigned HasDefaultedDefaultConstructor : 1;
438
439 /// True if a defaulted default constructor for this class would
440 /// be constexpr.
441 unsigned DefaultedDefaultConstructorIsConstexpr : 1;
442
443 /// True if this class has a constexpr default constructor.
444 ///
445 /// This is true for either a user-declared constexpr default constructor
446 /// or an implicitly declared constexpr default constructor.
447 unsigned HasConstexprDefaultConstructor : 1;
448
449 /// True if a defaulted destructor for this class would be constexpr.
450 unsigned DefaultedDestructorIsConstexpr : 1;
451
452 /// True when this class contains at least one non-static data
453 /// member or base class of non-literal or volatile type.
454 unsigned HasNonLiteralTypeFieldsOrBases : 1;
455
456 /// True when visible conversion functions are already computed
457 /// and are available.
458 unsigned ComputedVisibleConversions : 1;
459
460 /// Whether we have a C++11 user-provided default constructor (not
461 /// explicitly deleted or defaulted).
462 unsigned UserProvidedDefaultConstructor : 1;
463
464 /// The special members which have been declared for this class,
465 /// either by the user or implicitly.
466 unsigned DeclaredSpecialMembers : 6;
467
468 /// Whether an implicit copy constructor could have a const-qualified
469 /// parameter, for initializing virtual bases and for other subobjects.
470 unsigned ImplicitCopyConstructorCanHaveConstParamForVBase : 1;
471 unsigned ImplicitCopyConstructorCanHaveConstParamForNonVBase : 1;
472
473 /// Whether an implicit copy assignment operator would have a
474 /// const-qualified parameter.
475 unsigned ImplicitCopyAssignmentHasConstParam : 1;
476
477 /// Whether any declared copy constructor has a const-qualified
478 /// parameter.
479 unsigned HasDeclaredCopyConstructorWithConstParam : 1;
480
481 /// Whether any declared copy assignment operator has either a
482 /// const-qualified reference parameter or a non-reference parameter.
483 unsigned HasDeclaredCopyAssignmentWithConstParam : 1;
484
485 /// Whether this class describes a C++ lambda.
486 unsigned IsLambda : 1;
487
488 /// Whether we are currently parsing base specifiers.
489 unsigned IsParsingBaseSpecifiers : 1;
490
491 unsigned HasODRHash : 1;
492
493 /// A hash of parts of the class to help in ODR checking.
494 unsigned ODRHash = 0;
495
496 /// The number of base class specifiers in Bases.
497 unsigned NumBases = 0;
498
499 /// The number of virtual base class specifiers in VBases.
500 unsigned NumVBases = 0;
501
502 /// Base classes of this class.
503 ///
504 /// FIXME: This is wasted space for a union.
505 LazyCXXBaseSpecifiersPtr Bases;
506
507 /// direct and indirect virtual base classes of this class.
508 LazyCXXBaseSpecifiersPtr VBases;
509
510 /// The conversion functions of this C++ class (but not its
511 /// inherited conversion functions).
512 ///
513 /// Each of the entries in this overload set is a CXXConversionDecl.
514 LazyASTUnresolvedSet Conversions;
515
516 /// The conversion functions of this C++ class and all those
517 /// inherited conversion functions that are visible in this class.
518 ///
519 /// Each of the entries in this overload set is a CXXConversionDecl or a
520 /// FunctionTemplateDecl.
521 LazyASTUnresolvedSet VisibleConversions;
522
523 /// The declaration which defines this record.
524 CXXRecordDecl *Definition;
525
526 /// The first friend declaration in this class, or null if there
527 /// aren't any.
528 ///
529 /// This is actually currently stored in reverse order.
530 LazyDeclPtr FirstFriend;
531
532 DefinitionData(CXXRecordDecl *D);
533
534 /// Retrieve the set of direct base classes.
535 CXXBaseSpecifier *getBases() const {
536 if (!Bases.isOffset())
537 return Bases.get(nullptr);
538 return getBasesSlowCase();
539 }
540
541 /// Retrieve the set of virtual base classes.
542 CXXBaseSpecifier *getVBases() const {
543 if (!VBases.isOffset())
544 return VBases.get(nullptr);
545 return getVBasesSlowCase();
546 }
547
548 ArrayRef<CXXBaseSpecifier> bases() const {
549 return llvm::makeArrayRef(getBases(), NumBases);
550 }
551
552 ArrayRef<CXXBaseSpecifier> vbases() const {
553 return llvm::makeArrayRef(getVBases(), NumVBases);
554 }
555
556 private:
557 CXXBaseSpecifier *getBasesSlowCase() const;
558 CXXBaseSpecifier *getVBasesSlowCase() const;
559 };
560
561 struct DefinitionData *DefinitionData;
562
563 /// Describes a C++ closure type (generated by a lambda expression).
564 struct LambdaDefinitionData : public DefinitionData {
565 using Capture = LambdaCapture;
566
567 /// Whether this lambda is known to be dependent, even if its
568 /// context isn't dependent.
569 ///
570 /// A lambda with a non-dependent context can be dependent if it occurs
571 /// within the default argument of a function template, because the
572 /// lambda will have been created with the enclosing context as its
573 /// declaration context, rather than function. This is an unfortunate
574 /// artifact of having to parse the default arguments before.
575 unsigned Dependent : 1;
576
577 /// Whether this lambda is a generic lambda.
578 unsigned IsGenericLambda : 1;
579
580 /// The Default Capture.
581 unsigned CaptureDefault : 2;
582
583 /// The number of captures in this lambda is limited 2^NumCaptures.
584 unsigned NumCaptures : 15;
585
586 /// The number of explicit captures in this lambda.
587 unsigned NumExplicitCaptures : 13;
588
589 /// The number used to indicate this lambda expression for name
590 /// mangling in the Itanium C++ ABI.
591 unsigned ManglingNumber = 0;
592
593 /// The declaration that provides context for this lambda, if the
594 /// actual DeclContext does not suffice. This is used for lambdas that
595 /// occur within default arguments of function parameters within the class
596 /// or within a data member initializer.
597 LazyDeclPtr ContextDecl;
598
599 /// The list of captures, both explicit and implicit, for this
600 /// lambda.
601 Capture *Captures = nullptr;
602
603 /// The type of the call method.
604 TypeSourceInfo *MethodTyInfo;
605
606 LambdaDefinitionData(CXXRecordDecl *D, TypeSourceInfo *Info,
607 bool Dependent, bool IsGeneric,
608 LambdaCaptureDefault CaptureDefault)
609 : DefinitionData(D), Dependent(Dependent), IsGenericLambda(IsGeneric),
610 CaptureDefault(CaptureDefault), NumCaptures(0), NumExplicitCaptures(0),
611 MethodTyInfo(Info) {
612 IsLambda = true;
613
614 // C++1z [expr.prim.lambda]p4:
615 // This class type is not an aggregate type.
616 Aggregate = false;
617 PlainOldData = false;
618 }
619 };
620
621 struct DefinitionData *dataPtr() const {
622 // Complete the redecl chain (if necessary).
623 getMostRecentDecl();
624 return DefinitionData;
625 }
626
627 struct DefinitionData &data() const {
628 auto *DD = dataPtr();
629 assert(DD && "queried property of class with no definition")((DD && "queried property of class with no definition"
) ? static_cast<void> (0) : __assert_fail ("DD && \"queried property of class with no definition\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 629, __PRETTY_FUNCTION__))
;
630 return *DD;
631 }
632
633 struct LambdaDefinitionData &getLambdaData() const {
634 // No update required: a merged definition cannot change any lambda
635 // properties.
636 auto *DD = DefinitionData;
637 assert(DD && DD->IsLambda && "queried lambda property of non-lambda class")((DD && DD->IsLambda && "queried lambda property of non-lambda class"
) ? static_cast<void> (0) : __assert_fail ("DD && DD->IsLambda && \"queried lambda property of non-lambda class\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 637, __PRETTY_FUNCTION__))
;
638 return static_cast<LambdaDefinitionData&>(*DD);
639 }
640
641 /// The template or declaration that this declaration
642 /// describes or was instantiated from, respectively.
643 ///
644 /// For non-templates, this value will be null. For record
645 /// declarations that describe a class template, this will be a
646 /// pointer to a ClassTemplateDecl. For member
647 /// classes of class template specializations, this will be the
648 /// MemberSpecializationInfo referring to the member class that was
649 /// instantiated or specialized.
650 llvm::PointerUnion<ClassTemplateDecl *, MemberSpecializationInfo *>
651 TemplateOrInstantiation;
652
653 /// Called from setBases and addedMember to notify the class that a
654 /// direct or virtual base class or a member of class type has been added.
655 void addedClassSubobject(CXXRecordDecl *Base);
656
657 /// Notify the class that member has been added.
658 ///
659 /// This routine helps maintain information about the class based on which
660 /// members have been added. It will be invoked by DeclContext::addDecl()
661 /// whenever a member is added to this record.
662 void addedMember(Decl *D);
663
664 void markedVirtualFunctionPure();
665
666 /// Get the head of our list of friend declarations, possibly
667 /// deserializing the friends from an external AST source.
668 FriendDecl *getFirstFriend() const;
669
670 /// Determine whether this class has an empty base class subobject of type X
671 /// or of one of the types that might be at offset 0 within X (per the C++
672 /// "standard layout" rules).
673 bool hasSubobjectAtOffsetZeroOfEmptyBaseType(ASTContext &Ctx,
674 const CXXRecordDecl *X);
675
676protected:
677 CXXRecordDecl(Kind K, TagKind TK, const ASTContext &C, DeclContext *DC,
678 SourceLocation StartLoc, SourceLocation IdLoc,
679 IdentifierInfo *Id, CXXRecordDecl *PrevDecl);
680
681public:
682 /// Iterator that traverses the base classes of a class.
683 using base_class_iterator = CXXBaseSpecifier *;
684
685 /// Iterator that traverses the base classes of a class.
686 using base_class_const_iterator = const CXXBaseSpecifier *;
687
688 CXXRecordDecl *getCanonicalDecl() override {
689 return cast<CXXRecordDecl>(RecordDecl::getCanonicalDecl());
690 }
691
692 const CXXRecordDecl *getCanonicalDecl() const {
693 return const_cast<CXXRecordDecl*>(this)->getCanonicalDecl();
694 }
695
696 CXXRecordDecl *getPreviousDecl() {
697 return cast_or_null<CXXRecordDecl>(
698 static_cast<RecordDecl *>(this)->getPreviousDecl());
699 }
700
701 const CXXRecordDecl *getPreviousDecl() const {
702 return const_cast<CXXRecordDecl*>(this)->getPreviousDecl();
703 }
704
705 CXXRecordDecl *getMostRecentDecl() {
706 return cast<CXXRecordDecl>(
707 static_cast<RecordDecl *>(this)->getMostRecentDecl());
708 }
709
710 const CXXRecordDecl *getMostRecentDecl() const {
711 return const_cast<CXXRecordDecl*>(this)->getMostRecentDecl();
712 }
713
714 CXXRecordDecl *getMostRecentNonInjectedDecl() {
715 CXXRecordDecl *Recent =
716 static_cast<CXXRecordDecl *>(this)->getMostRecentDecl();
717 while (Recent->isInjectedClassName()) {
718 // FIXME: Does injected class name need to be in the redeclarations chain?
719 assert(Recent->getPreviousDecl())((Recent->getPreviousDecl()) ? static_cast<void> (0)
: __assert_fail ("Recent->getPreviousDecl()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 719, __PRETTY_FUNCTION__))
;
720 Recent = Recent->getPreviousDecl();
721 }
722 return Recent;
723 }
724
725 const CXXRecordDecl *getMostRecentNonInjectedDecl() const {
726 return const_cast<CXXRecordDecl*>(this)->getMostRecentNonInjectedDecl();
727 }
728
729 CXXRecordDecl *getDefinition() const {
730 // We only need an update if we don't already know which
731 // declaration is the definition.
732 auto *DD = DefinitionData ? DefinitionData : dataPtr();
733 return DD ? DD->Definition : nullptr;
734 }
735
736 bool hasDefinition() const { return DefinitionData || dataPtr(); }
737
738 static CXXRecordDecl *Create(const ASTContext &C, TagKind TK, DeclContext *DC,
739 SourceLocation StartLoc, SourceLocation IdLoc,
740 IdentifierInfo *Id,
741 CXXRecordDecl *PrevDecl = nullptr,
742 bool DelayTypeCreation = false);
743 static CXXRecordDecl *CreateLambda(const ASTContext &C, DeclContext *DC,
744 TypeSourceInfo *Info, SourceLocation Loc,
745 bool DependentLambda, bool IsGeneric,
746 LambdaCaptureDefault CaptureDefault);
747 static CXXRecordDecl *CreateDeserialized(const ASTContext &C, unsigned ID);
748
749 bool isDynamicClass() const {
750 return data().Polymorphic || data().NumVBases != 0;
751 }
752
753 /// @returns true if class is dynamic or might be dynamic because the
754 /// definition is incomplete of dependent.
755 bool mayBeDynamicClass() const {
756 return !hasDefinition() || isDynamicClass() || hasAnyDependentBases();
757 }
758
759 /// @returns true if class is non dynamic or might be non dynamic because the
760 /// definition is incomplete of dependent.
761 bool mayBeNonDynamicClass() const {
762 return !hasDefinition() || !isDynamicClass() || hasAnyDependentBases();
763 }
764
765 void setIsParsingBaseSpecifiers() { data().IsParsingBaseSpecifiers = true; }
766
767 bool isParsingBaseSpecifiers() const {
768 return data().IsParsingBaseSpecifiers;
769 }
770
771 unsigned getODRHash() const;
772
773 /// Sets the base classes of this struct or class.
774 void setBases(CXXBaseSpecifier const * const *Bases, unsigned NumBases);
775
776 /// Retrieves the number of base classes of this class.
777 unsigned getNumBases() const { return data().NumBases; }
778
779 using base_class_range = llvm::iterator_range<base_class_iterator>;
780 using base_class_const_range =
781 llvm::iterator_range<base_class_const_iterator>;
782
783 base_class_range bases() {
784 return base_class_range(bases_begin(), bases_end());
785 }
786 base_class_const_range bases() const {
787 return base_class_const_range(bases_begin(), bases_end());
788 }
789
790 base_class_iterator bases_begin() { return data().getBases(); }
791 base_class_const_iterator bases_begin() const { return data().getBases(); }
792 base_class_iterator bases_end() { return bases_begin() + data().NumBases; }
793 base_class_const_iterator bases_end() const {
794 return bases_begin() + data().NumBases;
795 }
796
797 /// Retrieves the number of virtual base classes of this class.
798 unsigned getNumVBases() const { return data().NumVBases; }
799
800 base_class_range vbases() {
801 return base_class_range(vbases_begin(), vbases_end());
802 }
803 base_class_const_range vbases() const {
804 return base_class_const_range(vbases_begin(), vbases_end());
805 }
806
807 base_class_iterator vbases_begin() { return data().getVBases(); }
808 base_class_const_iterator vbases_begin() const { return data().getVBases(); }
809 base_class_iterator vbases_end() { return vbases_begin() + data().NumVBases; }
810 base_class_const_iterator vbases_end() const {
811 return vbases_begin() + data().NumVBases;
812 }
813
814 /// Determine whether this class has any dependent base classes which
815 /// are not the current instantiation.
816 bool hasAnyDependentBases() const;
817
818 /// Iterator access to method members. The method iterator visits
819 /// all method members of the class, including non-instance methods,
820 /// special methods, etc.
821 using method_iterator = specific_decl_iterator<CXXMethodDecl>;
822 using method_range =
823 llvm::iterator_range<specific_decl_iterator<CXXMethodDecl>>;
824
825 method_range methods() const {
826 return method_range(method_begin(), method_end());
827 }
828
829 /// Method begin iterator. Iterates in the order the methods
830 /// were declared.
831 method_iterator method_begin() const {
832 return method_iterator(decls_begin());
833 }
834
835 /// Method past-the-end iterator.
836 method_iterator method_end() const {
837 return method_iterator(decls_end());
838 }
839
840 /// Iterator access to constructor members.
841 using ctor_iterator = specific_decl_iterator<CXXConstructorDecl>;
842 using ctor_range =
843 llvm::iterator_range<specific_decl_iterator<CXXConstructorDecl>>;
844
845 ctor_range ctors() const { return ctor_range(ctor_begin(), ctor_end()); }
846
847 ctor_iterator ctor_begin() const {
848 return ctor_iterator(decls_begin());
849 }
850
851 ctor_iterator ctor_end() const {
852 return ctor_iterator(decls_end());
853 }
854
855 /// An iterator over friend declarations. All of these are defined
856 /// in DeclFriend.h.
857 class friend_iterator;
858 using friend_range = llvm::iterator_range<friend_iterator>;
859
860 friend_range friends() const;
861 friend_iterator friend_begin() const;
862 friend_iterator friend_end() const;
863 void pushFriendDecl(FriendDecl *FD);
864
865 /// Determines whether this record has any friends.
866 bool hasFriends() const {
867 return data().FirstFriend.isValid();
868 }
869
870 /// \c true if a defaulted copy constructor for this class would be
871 /// deleted.
872 bool defaultedCopyConstructorIsDeleted() const {
873 assert((!needsOverloadResolutionForCopyConstructor() ||(((!needsOverloadResolutionForCopyConstructor() || (data().DeclaredSpecialMembers
& SMF_CopyConstructor)) && "this property has not yet been computed by Sema"
) ? static_cast<void> (0) : __assert_fail ("(!needsOverloadResolutionForCopyConstructor() || (data().DeclaredSpecialMembers & SMF_CopyConstructor)) && \"this property has not yet been computed by Sema\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 875, __PRETTY_FUNCTION__))
874 (data().DeclaredSpecialMembers & SMF_CopyConstructor)) &&(((!needsOverloadResolutionForCopyConstructor() || (data().DeclaredSpecialMembers
& SMF_CopyConstructor)) && "this property has not yet been computed by Sema"
) ? static_cast<void> (0) : __assert_fail ("(!needsOverloadResolutionForCopyConstructor() || (data().DeclaredSpecialMembers & SMF_CopyConstructor)) && \"this property has not yet been computed by Sema\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 875, __PRETTY_FUNCTION__))
875 "this property has not yet been computed by Sema")(((!needsOverloadResolutionForCopyConstructor() || (data().DeclaredSpecialMembers
& SMF_CopyConstructor)) && "this property has not yet been computed by Sema"
) ? static_cast<void> (0) : __assert_fail ("(!needsOverloadResolutionForCopyConstructor() || (data().DeclaredSpecialMembers & SMF_CopyConstructor)) && \"this property has not yet been computed by Sema\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 875, __PRETTY_FUNCTION__))
;
876 return data().DefaultedCopyConstructorIsDeleted;
877 }
878
879 /// \c true if a defaulted move constructor for this class would be
880 /// deleted.
881 bool defaultedMoveConstructorIsDeleted() const {
882 assert((!needsOverloadResolutionForMoveConstructor() ||(((!needsOverloadResolutionForMoveConstructor() || (data().DeclaredSpecialMembers
& SMF_MoveConstructor)) && "this property has not yet been computed by Sema"
) ? static_cast<void> (0) : __assert_fail ("(!needsOverloadResolutionForMoveConstructor() || (data().DeclaredSpecialMembers & SMF_MoveConstructor)) && \"this property has not yet been computed by Sema\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 884, __PRETTY_FUNCTION__))
883 (data().DeclaredSpecialMembers & SMF_MoveConstructor)) &&(((!needsOverloadResolutionForMoveConstructor() || (data().DeclaredSpecialMembers
& SMF_MoveConstructor)) && "this property has not yet been computed by Sema"
) ? static_cast<void> (0) : __assert_fail ("(!needsOverloadResolutionForMoveConstructor() || (data().DeclaredSpecialMembers & SMF_MoveConstructor)) && \"this property has not yet been computed by Sema\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 884, __PRETTY_FUNCTION__))
884 "this property has not yet been computed by Sema")(((!needsOverloadResolutionForMoveConstructor() || (data().DeclaredSpecialMembers
& SMF_MoveConstructor)) && "this property has not yet been computed by Sema"
) ? static_cast<void> (0) : __assert_fail ("(!needsOverloadResolutionForMoveConstructor() || (data().DeclaredSpecialMembers & SMF_MoveConstructor)) && \"this property has not yet been computed by Sema\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 884, __PRETTY_FUNCTION__))
;
885 return data().DefaultedMoveConstructorIsDeleted;
886 }
887
888 /// \c true if a defaulted destructor for this class would be deleted.
889 bool defaultedDestructorIsDeleted() const {
890 assert((!needsOverloadResolutionForDestructor() ||(((!needsOverloadResolutionForDestructor() || (data().DeclaredSpecialMembers
& SMF_Destructor)) && "this property has not yet been computed by Sema"
) ? static_cast<void> (0) : __assert_fail ("(!needsOverloadResolutionForDestructor() || (data().DeclaredSpecialMembers & SMF_Destructor)) && \"this property has not yet been computed by Sema\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 892, __PRETTY_FUNCTION__))
891 (data().DeclaredSpecialMembers & SMF_Destructor)) &&(((!needsOverloadResolutionForDestructor() || (data().DeclaredSpecialMembers
& SMF_Destructor)) && "this property has not yet been computed by Sema"
) ? static_cast<void> (0) : __assert_fail ("(!needsOverloadResolutionForDestructor() || (data().DeclaredSpecialMembers & SMF_Destructor)) && \"this property has not yet been computed by Sema\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 892, __PRETTY_FUNCTION__))
892 "this property has not yet been computed by Sema")(((!needsOverloadResolutionForDestructor() || (data().DeclaredSpecialMembers
& SMF_Destructor)) && "this property has not yet been computed by Sema"
) ? static_cast<void> (0) : __assert_fail ("(!needsOverloadResolutionForDestructor() || (data().DeclaredSpecialMembers & SMF_Destructor)) && \"this property has not yet been computed by Sema\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 892, __PRETTY_FUNCTION__))
;
893 return data().DefaultedDestructorIsDeleted;
894 }
895
896 /// \c true if we know for sure that this class has a single,
897 /// accessible, unambiguous copy constructor that is not deleted.
898 bool hasSimpleCopyConstructor() const {
899 return !hasUserDeclaredCopyConstructor() &&
900 !data().DefaultedCopyConstructorIsDeleted;
901 }
902
903 /// \c true if we know for sure that this class has a single,
904 /// accessible, unambiguous move constructor that is not deleted.
905 bool hasSimpleMoveConstructor() const {
906 return !hasUserDeclaredMoveConstructor() && hasMoveConstructor() &&
907 !data().DefaultedMoveConstructorIsDeleted;
908 }
909
910 /// \c true if we know for sure that this class has a single,
911 /// accessible, unambiguous move assignment operator that is not deleted.
912 bool hasSimpleMoveAssignment() const {
913 return !hasUserDeclaredMoveAssignment() && hasMoveAssignment() &&
914 !data().DefaultedMoveAssignmentIsDeleted;
915 }
916
917 /// \c true if we know for sure that this class has an accessible
918 /// destructor that is not deleted.
919 bool hasSimpleDestructor() const {
920 return !hasUserDeclaredDestructor() &&
921 !data().DefaultedDestructorIsDeleted;
922 }
923
924 /// Determine whether this class has any default constructors.
925 bool hasDefaultConstructor() const {
926 return (data().DeclaredSpecialMembers & SMF_DefaultConstructor) ||
927 needsImplicitDefaultConstructor();
928 }
929
930 /// Determine if we need to declare a default constructor for
931 /// this class.
932 ///
933 /// This value is used for lazy creation of default constructors.
934 bool needsImplicitDefaultConstructor() const {
935 return !data().UserDeclaredConstructor &&
936 !(data().DeclaredSpecialMembers & SMF_DefaultConstructor) &&
937 (!isLambda() || lambdaIsDefaultConstructibleAndAssignable());
938 }
939
940 /// Determine whether this class has any user-declared constructors.
941 ///
942 /// When true, a default constructor will not be implicitly declared.
943 bool hasUserDeclaredConstructor() const {
944 return data().UserDeclaredConstructor;
945 }
946
947 /// Whether this class has a user-provided default constructor
948 /// per C++11.
949 bool hasUserProvidedDefaultConstructor() const {
950 return data().UserProvidedDefaultConstructor;
951 }
952
953 /// Determine whether this class has a user-declared copy constructor.
954 ///
955 /// When false, a copy constructor will be implicitly declared.
956 bool hasUserDeclaredCopyConstructor() const {
957 return data().UserDeclaredSpecialMembers & SMF_CopyConstructor;
958 }
959
960 /// Determine whether this class needs an implicit copy
961 /// constructor to be lazily declared.
962 bool needsImplicitCopyConstructor() const {
963 return !(data().DeclaredSpecialMembers & SMF_CopyConstructor);
964 }
965
966 /// Determine whether we need to eagerly declare a defaulted copy
967 /// constructor for this class.
968 bool needsOverloadResolutionForCopyConstructor() const {
969 // C++17 [class.copy.ctor]p6:
970 // If the class definition declares a move constructor or move assignment
971 // operator, the implicitly declared copy constructor is defined as
972 // deleted.
973 // In MSVC mode, sometimes a declared move assignment does not delete an
974 // implicit copy constructor, so defer this choice to Sema.
975 if (data().UserDeclaredSpecialMembers &
976 (SMF_MoveConstructor | SMF_MoveAssignment))
977 return true;
978 return data().NeedOverloadResolutionForCopyConstructor;
979 }
980
981 /// Determine whether an implicit copy constructor for this type
982 /// would have a parameter with a const-qualified reference type.
983 bool implicitCopyConstructorHasConstParam() const {
984 return data().ImplicitCopyConstructorCanHaveConstParamForNonVBase &&
985 (isAbstract() ||
986 data().ImplicitCopyConstructorCanHaveConstParamForVBase);
987 }
988
989 /// Determine whether this class has a copy constructor with
990 /// a parameter type which is a reference to a const-qualified type.
991 bool hasCopyConstructorWithConstParam() const {
992 return data().HasDeclaredCopyConstructorWithConstParam ||
993 (needsImplicitCopyConstructor() &&
994 implicitCopyConstructorHasConstParam());
995 }
996
997 /// Whether this class has a user-declared move constructor or
998 /// assignment operator.
999 ///
1000 /// When false, a move constructor and assignment operator may be
1001 /// implicitly declared.
1002 bool hasUserDeclaredMoveOperation() const {
1003 return data().UserDeclaredSpecialMembers &
1004 (SMF_MoveConstructor | SMF_MoveAssignment);
1005 }
1006
1007 /// Determine whether this class has had a move constructor
1008 /// declared by the user.
1009 bool hasUserDeclaredMoveConstructor() const {
1010 return data().UserDeclaredSpecialMembers & SMF_MoveConstructor;
1011 }
1012
1013 /// Determine whether this class has a move constructor.
1014 bool hasMoveConstructor() const {
1015 return (data().DeclaredSpecialMembers & SMF_MoveConstructor) ||
1016 needsImplicitMoveConstructor();
1017 }
1018
1019 /// Set that we attempted to declare an implicit copy
1020 /// constructor, but overload resolution failed so we deleted it.
1021 void setImplicitCopyConstructorIsDeleted() {
1022 assert((data().DefaultedCopyConstructorIsDeleted ||(((data().DefaultedCopyConstructorIsDeleted || needsOverloadResolutionForCopyConstructor
()) && "Copy constructor should not be deleted") ? static_cast
<void> (0) : __assert_fail ("(data().DefaultedCopyConstructorIsDeleted || needsOverloadResolutionForCopyConstructor()) && \"Copy constructor should not be deleted\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 1024, __PRETTY_FUNCTION__))
1023 needsOverloadResolutionForCopyConstructor()) &&(((data().DefaultedCopyConstructorIsDeleted || needsOverloadResolutionForCopyConstructor
()) && "Copy constructor should not be deleted") ? static_cast
<void> (0) : __assert_fail ("(data().DefaultedCopyConstructorIsDeleted || needsOverloadResolutionForCopyConstructor()) && \"Copy constructor should not be deleted\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 1024, __PRETTY_FUNCTION__))
1024 "Copy constructor should not be deleted")(((data().DefaultedCopyConstructorIsDeleted || needsOverloadResolutionForCopyConstructor
()) && "Copy constructor should not be deleted") ? static_cast
<void> (0) : __assert_fail ("(data().DefaultedCopyConstructorIsDeleted || needsOverloadResolutionForCopyConstructor()) && \"Copy constructor should not be deleted\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 1024, __PRETTY_FUNCTION__))
;
1025 data().DefaultedCopyConstructorIsDeleted = true;
1026 }
1027
1028 /// Set that we attempted to declare an implicit move
1029 /// constructor, but overload resolution failed so we deleted it.
1030 void setImplicitMoveConstructorIsDeleted() {
1031 assert((data().DefaultedMoveConstructorIsDeleted ||(((data().DefaultedMoveConstructorIsDeleted || needsOverloadResolutionForMoveConstructor
()) && "move constructor should not be deleted") ? static_cast
<void> (0) : __assert_fail ("(data().DefaultedMoveConstructorIsDeleted || needsOverloadResolutionForMoveConstructor()) && \"move constructor should not be deleted\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 1033, __PRETTY_FUNCTION__))
1032 needsOverloadResolutionForMoveConstructor()) &&(((data().DefaultedMoveConstructorIsDeleted || needsOverloadResolutionForMoveConstructor
()) && "move constructor should not be deleted") ? static_cast
<void> (0) : __assert_fail ("(data().DefaultedMoveConstructorIsDeleted || needsOverloadResolutionForMoveConstructor()) && \"move constructor should not be deleted\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 1033, __PRETTY_FUNCTION__))
1033 "move constructor should not be deleted")(((data().DefaultedMoveConstructorIsDeleted || needsOverloadResolutionForMoveConstructor
()) && "move constructor should not be deleted") ? static_cast
<void> (0) : __assert_fail ("(data().DefaultedMoveConstructorIsDeleted || needsOverloadResolutionForMoveConstructor()) && \"move constructor should not be deleted\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 1033, __PRETTY_FUNCTION__))
;
1034 data().DefaultedMoveConstructorIsDeleted = true;
1035 }
1036
1037 /// Set that we attempted to declare an implicit destructor,
1038 /// but overload resolution failed so we deleted it.
1039 void setImplicitDestructorIsDeleted() {
1040 assert((data().DefaultedDestructorIsDeleted ||(((data().DefaultedDestructorIsDeleted || needsOverloadResolutionForDestructor
()) && "destructor should not be deleted") ? static_cast
<void> (0) : __assert_fail ("(data().DefaultedDestructorIsDeleted || needsOverloadResolutionForDestructor()) && \"destructor should not be deleted\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 1042, __PRETTY_FUNCTION__))
1041 needsOverloadResolutionForDestructor()) &&(((data().DefaultedDestructorIsDeleted || needsOverloadResolutionForDestructor
()) && "destructor should not be deleted") ? static_cast
<void> (0) : __assert_fail ("(data().DefaultedDestructorIsDeleted || needsOverloadResolutionForDestructor()) && \"destructor should not be deleted\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 1042, __PRETTY_FUNCTION__))
1042 "destructor should not be deleted")(((data().DefaultedDestructorIsDeleted || needsOverloadResolutionForDestructor
()) && "destructor should not be deleted") ? static_cast
<void> (0) : __assert_fail ("(data().DefaultedDestructorIsDeleted || needsOverloadResolutionForDestructor()) && \"destructor should not be deleted\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 1042, __PRETTY_FUNCTION__))
;
1043 data().DefaultedDestructorIsDeleted = true;
1044 }
1045
1046 /// Determine whether this class should get an implicit move
1047 /// constructor or if any existing special member function inhibits this.
1048 bool needsImplicitMoveConstructor() const {
1049 return !(data().DeclaredSpecialMembers & SMF_MoveConstructor) &&
1050 !hasUserDeclaredCopyConstructor() &&
1051 !hasUserDeclaredCopyAssignment() &&
1052 !hasUserDeclaredMoveAssignment() &&
1053 !hasUserDeclaredDestructor();
1054 }
1055
1056 /// Determine whether we need to eagerly declare a defaulted move
1057 /// constructor for this class.
1058 bool needsOverloadResolutionForMoveConstructor() const {
1059 return data().NeedOverloadResolutionForMoveConstructor;
1060 }
1061
1062 /// Determine whether this class has a user-declared copy assignment
1063 /// operator.
1064 ///
1065 /// When false, a copy assignment operator will be implicitly declared.
1066 bool hasUserDeclaredCopyAssignment() const {
1067 return data().UserDeclaredSpecialMembers & SMF_CopyAssignment;
1068 }
1069
1070 /// Determine whether this class needs an implicit copy
1071 /// assignment operator to be lazily declared.
1072 bool needsImplicitCopyAssignment() const {
1073 return !(data().DeclaredSpecialMembers & SMF_CopyAssignment);
1074 }
1075
1076 /// Determine whether we need to eagerly declare a defaulted copy
1077 /// assignment operator for this class.
1078 bool needsOverloadResolutionForCopyAssignment() const {
1079 return data().HasMutableFields;
1080 }
1081
1082 /// Determine whether an implicit copy assignment operator for this
1083 /// type would have a parameter with a const-qualified reference type.
1084 bool implicitCopyAssignmentHasConstParam() const {
1085 return data().ImplicitCopyAssignmentHasConstParam;
1086 }
1087
1088 /// Determine whether this class has a copy assignment operator with
1089 /// a parameter type which is a reference to a const-qualified type or is not
1090 /// a reference.
1091 bool hasCopyAssignmentWithConstParam() const {
1092 return data().HasDeclaredCopyAssignmentWithConstParam ||
1093 (needsImplicitCopyAssignment() &&
1094 implicitCopyAssignmentHasConstParam());
1095 }
1096
1097 /// Determine whether this class has had a move assignment
1098 /// declared by the user.
1099 bool hasUserDeclaredMoveAssignment() const {
1100 return data().UserDeclaredSpecialMembers & SMF_MoveAssignment;
1101 }
1102
1103 /// Determine whether this class has a move assignment operator.
1104 bool hasMoveAssignment() const {
1105 return (data().DeclaredSpecialMembers & SMF_MoveAssignment) ||
1106 needsImplicitMoveAssignment();
1107 }
1108
1109 /// Set that we attempted to declare an implicit move assignment
1110 /// operator, but overload resolution failed so we deleted it.
1111 void setImplicitMoveAssignmentIsDeleted() {
1112 assert((data().DefaultedMoveAssignmentIsDeleted ||(((data().DefaultedMoveAssignmentIsDeleted || needsOverloadResolutionForMoveAssignment
()) && "move assignment should not be deleted") ? static_cast
<void> (0) : __assert_fail ("(data().DefaultedMoveAssignmentIsDeleted || needsOverloadResolutionForMoveAssignment()) && \"move assignment should not be deleted\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 1114, __PRETTY_FUNCTION__))
1113 needsOverloadResolutionForMoveAssignment()) &&(((data().DefaultedMoveAssignmentIsDeleted || needsOverloadResolutionForMoveAssignment
()) && "move assignment should not be deleted") ? static_cast
<void> (0) : __assert_fail ("(data().DefaultedMoveAssignmentIsDeleted || needsOverloadResolutionForMoveAssignment()) && \"move assignment should not be deleted\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 1114, __PRETTY_FUNCTION__))
1114 "move assignment should not be deleted")(((data().DefaultedMoveAssignmentIsDeleted || needsOverloadResolutionForMoveAssignment
()) && "move assignment should not be deleted") ? static_cast
<void> (0) : __assert_fail ("(data().DefaultedMoveAssignmentIsDeleted || needsOverloadResolutionForMoveAssignment()) && \"move assignment should not be deleted\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 1114, __PRETTY_FUNCTION__))
;
1115 data().DefaultedMoveAssignmentIsDeleted = true;
1116 }
1117
1118 /// Determine whether this class should get an implicit move
1119 /// assignment operator or if any existing special member function inhibits
1120 /// this.
1121 bool needsImplicitMoveAssignment() const {
1122 return !(data().DeclaredSpecialMembers & SMF_MoveAssignment) &&
1123 !hasUserDeclaredCopyConstructor() &&
1124 !hasUserDeclaredCopyAssignment() &&
1125 !hasUserDeclaredMoveConstructor() &&
1126 !hasUserDeclaredDestructor() &&
1127 (!isLambda() || lambdaIsDefaultConstructibleAndAssignable());
1128 }
1129
1130 /// Determine whether we need to eagerly declare a move assignment
1131 /// operator for this class.
1132 bool needsOverloadResolutionForMoveAssignment() const {
1133 return data().NeedOverloadResolutionForMoveAssignment;
1134 }
1135
1136 /// Determine whether this class has a user-declared destructor.
1137 ///
1138 /// When false, a destructor will be implicitly declared.
1139 bool hasUserDeclaredDestructor() const {
1140 return data().UserDeclaredSpecialMembers & SMF_Destructor;
1141 }
1142
1143 /// Determine whether this class needs an implicit destructor to
1144 /// be lazily declared.
1145 bool needsImplicitDestructor() const {
1146 return !(data().DeclaredSpecialMembers & SMF_Destructor);
1147 }
1148
1149 /// Determine whether we need to eagerly declare a destructor for this
1150 /// class.
1151 bool needsOverloadResolutionForDestructor() const {
1152 return data().NeedOverloadResolutionForDestructor;
1153 }
1154
1155 /// Determine whether this class describes a lambda function object.
1156 bool isLambda() const {
1157 // An update record can't turn a non-lambda into a lambda.
1158 auto *DD = DefinitionData;
1159 return DD && DD->IsLambda;
1160 }
1161
1162 /// Determine whether this class describes a generic
1163 /// lambda function object (i.e. function call operator is
1164 /// a template).
1165 bool isGenericLambda() const;
1166
1167 /// Determine whether this lambda should have an implicit default constructor
1168 /// and copy and move assignment operators.
1169 bool lambdaIsDefaultConstructibleAndAssignable() const;
1170
1171 /// Retrieve the lambda call operator of the closure type
1172 /// if this is a closure type.
1173 CXXMethodDecl *getLambdaCallOperator() const;
1174
1175 /// Retrieve the dependent lambda call operator of the closure type
1176 /// if this is a templated closure type.
1177 FunctionTemplateDecl *getDependentLambdaCallOperator() const;
1178
1179 /// Retrieve the lambda static invoker, the address of which
1180 /// is returned by the conversion operator, and the body of which
1181 /// is forwarded to the lambda call operator.
1182 CXXMethodDecl *getLambdaStaticInvoker() const;
1183
1184 /// Retrieve the generic lambda's template parameter list.
1185 /// Returns null if the class does not represent a lambda or a generic
1186 /// lambda.
1187 TemplateParameterList *getGenericLambdaTemplateParameterList() const;
1188
1189 /// Retrieve the lambda template parameters that were specified explicitly.
1190 ArrayRef<NamedDecl *> getLambdaExplicitTemplateParameters() const;
1191
1192 LambdaCaptureDefault getLambdaCaptureDefault() const {
1193 assert(isLambda())((isLambda()) ? static_cast<void> (0) : __assert_fail (
"isLambda()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 1193, __PRETTY_FUNCTION__))
;
1194 return static_cast<LambdaCaptureDefault>(getLambdaData().CaptureDefault);
1195 }
1196
1197 /// For a closure type, retrieve the mapping from captured
1198 /// variables and \c this to the non-static data members that store the
1199 /// values or references of the captures.
1200 ///
1201 /// \param Captures Will be populated with the mapping from captured
1202 /// variables to the corresponding fields.
1203 ///
1204 /// \param ThisCapture Will be set to the field declaration for the
1205 /// \c this capture.
1206 ///
1207 /// \note No entries will be added for init-captures, as they do not capture
1208 /// variables.
1209 void getCaptureFields(llvm::DenseMap<const VarDecl *, FieldDecl *> &Captures,
1210 FieldDecl *&ThisCapture) const;
1211
1212 using capture_const_iterator = const LambdaCapture *;
1213 using capture_const_range = llvm::iterator_range<capture_const_iterator>;
1214
1215 capture_const_range captures() const {
1216 return capture_const_range(captures_begin(), captures_end());
1217 }
1218
1219 capture_const_iterator captures_begin() const {
1220 return isLambda() ? getLambdaData().Captures : nullptr;
1221 }
1222
1223 capture_const_iterator captures_end() const {
1224 return isLambda() ? captures_begin() + getLambdaData().NumCaptures
1225 : nullptr;
1226 }
1227
1228 using conversion_iterator = UnresolvedSetIterator;
1229
1230 conversion_iterator conversion_begin() const {
1231 return data().Conversions.get(getASTContext()).begin();
1232 }
1233
1234 conversion_iterator conversion_end() const {
1235 return data().Conversions.get(getASTContext()).end();
1236 }
1237
1238 /// Removes a conversion function from this class. The conversion
1239 /// function must currently be a member of this class. Furthermore,
1240 /// this class must currently be in the process of being defined.
1241 void removeConversion(const NamedDecl *Old);
1242
1243 /// Get all conversion functions visible in current class,
1244 /// including conversion function templates.
1245 llvm::iterator_range<conversion_iterator> getVisibleConversionFunctions();
1246
1247 /// Determine whether this class is an aggregate (C++ [dcl.init.aggr]),
1248 /// which is a class with no user-declared constructors, no private
1249 /// or protected non-static data members, no base classes, and no virtual
1250 /// functions (C++ [dcl.init.aggr]p1).
1251 bool isAggregate() const { return data().Aggregate; }
1252
1253 /// Whether this class has any in-class initializers
1254 /// for non-static data members (including those in anonymous unions or
1255 /// structs).
1256 bool hasInClassInitializer() const { return data().HasInClassInitializer; }
1257
1258 /// Whether this class or any of its subobjects has any members of
1259 /// reference type which would make value-initialization ill-formed.
1260 ///
1261 /// Per C++03 [dcl.init]p5:
1262 /// - if T is a non-union class type without a user-declared constructor,
1263 /// then every non-static data member and base-class component of T is
1264 /// value-initialized [...] A program that calls for [...]
1265 /// value-initialization of an entity of reference type is ill-formed.
1266 bool hasUninitializedReferenceMember() const {
1267 return !isUnion() && !hasUserDeclaredConstructor() &&
1268 data().HasUninitializedReferenceMember;
1269 }
1270
1271 /// Whether this class is a POD-type (C++ [class]p4)
1272 ///
1273 /// For purposes of this function a class is POD if it is an aggregate
1274 /// that has no non-static non-POD data members, no reference data
1275 /// members, no user-defined copy assignment operator and no
1276 /// user-defined destructor.
1277 ///
1278 /// Note that this is the C++ TR1 definition of POD.
1279 bool isPOD() const { return data().PlainOldData; }
1280
1281 /// True if this class is C-like, without C++-specific features, e.g.
1282 /// it contains only public fields, no bases, tag kind is not 'class', etc.
1283 bool isCLike() const;
1284
1285 /// Determine whether this is an empty class in the sense of
1286 /// (C++11 [meta.unary.prop]).
1287 ///
1288 /// The CXXRecordDecl is a class type, but not a union type,
1289 /// with no non-static data members other than bit-fields of length 0,
1290 /// no virtual member functions, no virtual base classes,
1291 /// and no base class B for which is_empty<B>::value is false.
1292 ///
1293 /// \note This does NOT include a check for union-ness.
1294 bool isEmpty() const { return data().Empty; }
1295
1296 bool hasPrivateFields() const {
1297 return data().HasPrivateFields;
1298 }
1299
1300 bool hasProtectedFields() const {
1301 return data().HasProtectedFields;
1302 }
1303
1304 /// Determine whether this class has direct non-static data members.
1305 bool hasDirectFields() const {
1306 auto &D = data();
1307 return D.HasPublicFields || D.HasProtectedFields || D.HasPrivateFields;
1308 }
1309
1310 /// Whether this class is polymorphic (C++ [class.virtual]),
1311 /// which means that the class contains or inherits a virtual function.
1312 bool isPolymorphic() const { return data().Polymorphic; }
1313
1314 /// Determine whether this class has a pure virtual function.
1315 ///
1316 /// The class is is abstract per (C++ [class.abstract]p2) if it declares
1317 /// a pure virtual function or inherits a pure virtual function that is
1318 /// not overridden.
1319 bool isAbstract() const { return data().Abstract; }
1320
1321 /// Determine whether this class is standard-layout per
1322 /// C++ [class]p7.
1323 bool isStandardLayout() const { return data().IsStandardLayout; }
1324
1325 /// Determine whether this class was standard-layout per
1326 /// C++11 [class]p7, specifically using the C++11 rules without any DRs.
1327 bool isCXX11StandardLayout() const { return data().IsCXX11StandardLayout; }
1328
1329 /// Determine whether this class, or any of its class subobjects,
1330 /// contains a mutable field.
1331 bool hasMutableFields() const { return data().HasMutableFields; }
1332
1333 /// Determine whether this class has any variant members.
1334 bool hasVariantMembers() const { return data().HasVariantMembers; }
1335
1336 /// Determine whether this class has a trivial default constructor
1337 /// (C++11 [class.ctor]p5).
1338 bool hasTrivialDefaultConstructor() const {
1339 return hasDefaultConstructor() &&
1340 (data().HasTrivialSpecialMembers & SMF_DefaultConstructor);
1341 }
1342
1343 /// Determine whether this class has a non-trivial default constructor
1344 /// (C++11 [class.ctor]p5).
1345 bool hasNonTrivialDefaultConstructor() const {
1346 return (data().DeclaredNonTrivialSpecialMembers & SMF_DefaultConstructor) ||
1347 (needsImplicitDefaultConstructor() &&
1348 !(data().HasTrivialSpecialMembers & SMF_DefaultConstructor));
1349 }
1350
1351 /// Determine whether this class has at least one constexpr constructor
1352 /// other than the copy or move constructors.
1353 bool hasConstexprNonCopyMoveConstructor() const {
1354 return data().HasConstexprNonCopyMoveConstructor ||
1355 (needsImplicitDefaultConstructor() &&
1356 defaultedDefaultConstructorIsConstexpr());
1357 }
1358
1359 /// Determine whether a defaulted default constructor for this class
1360 /// would be constexpr.
1361 bool defaultedDefaultConstructorIsConstexpr() const {
1362 return data().DefaultedDefaultConstructorIsConstexpr &&
1363 (!isUnion() || hasInClassInitializer() || !hasVariantMembers() ||
1364 getASTContext().getLangOpts().CPlusPlus2a);
1365 }
1366
1367 /// Determine whether this class has a constexpr default constructor.
1368 bool hasConstexprDefaultConstructor() const {
1369 return data().HasConstexprDefaultConstructor ||
1370 (needsImplicitDefaultConstructor() &&
1371 defaultedDefaultConstructorIsConstexpr());
1372 }
1373
1374 /// Determine whether this class has a trivial copy constructor
1375 /// (C++ [class.copy]p6, C++11 [class.copy]p12)
1376 bool hasTrivialCopyConstructor() const {
1377 return data().HasTrivialSpecialMembers & SMF_CopyConstructor;
1378 }
1379
1380 bool hasTrivialCopyConstructorForCall() const {
1381 return data().HasTrivialSpecialMembersForCall & SMF_CopyConstructor;
1382 }
1383
1384 /// Determine whether this class has a non-trivial copy constructor
1385 /// (C++ [class.copy]p6, C++11 [class.copy]p12)
1386 bool hasNonTrivialCopyConstructor() const {
1387 return data().DeclaredNonTrivialSpecialMembers & SMF_CopyConstructor ||
1388 !hasTrivialCopyConstructor();
1389 }
1390
1391 bool hasNonTrivialCopyConstructorForCall() const {
1392 return (data().DeclaredNonTrivialSpecialMembersForCall &
1393 SMF_CopyConstructor) ||
1394 !hasTrivialCopyConstructorForCall();
1395 }
1396
1397 /// Determine whether this class has a trivial move constructor
1398 /// (C++11 [class.copy]p12)
1399 bool hasTrivialMoveConstructor() const {
1400 return hasMoveConstructor() &&
1401 (data().HasTrivialSpecialMembers & SMF_MoveConstructor);
1402 }
1403
1404 bool hasTrivialMoveConstructorForCall() const {
1405 return hasMoveConstructor() &&
1406 (data().HasTrivialSpecialMembersForCall & SMF_MoveConstructor);
1407 }
1408
1409 /// Determine whether this class has a non-trivial move constructor
1410 /// (C++11 [class.copy]p12)
1411 bool hasNonTrivialMoveConstructor() const {
1412 return (data().DeclaredNonTrivialSpecialMembers & SMF_MoveConstructor) ||
1413 (needsImplicitMoveConstructor() &&
1414 !(data().HasTrivialSpecialMembers & SMF_MoveConstructor));
1415 }
1416
1417 bool hasNonTrivialMoveConstructorForCall() const {
1418 return (data().DeclaredNonTrivialSpecialMembersForCall &
1419 SMF_MoveConstructor) ||
1420 (needsImplicitMoveConstructor() &&
1421 !(data().HasTrivialSpecialMembersForCall & SMF_MoveConstructor));
1422 }
1423
1424 /// Determine whether this class has a trivial copy assignment operator
1425 /// (C++ [class.copy]p11, C++11 [class.copy]p25)
1426 bool hasTrivialCopyAssignment() const {
1427 return data().HasTrivialSpecialMembers & SMF_CopyAssignment;
1428 }
1429
1430 /// Determine whether this class has a non-trivial copy assignment
1431 /// operator (C++ [class.copy]p11, C++11 [class.copy]p25)
1432 bool hasNonTrivialCopyAssignment() const {
1433 return data().DeclaredNonTrivialSpecialMembers & SMF_CopyAssignment ||
1434 !hasTrivialCopyAssignment();
1435 }
1436
1437 /// Determine whether this class has a trivial move assignment operator
1438 /// (C++11 [class.copy]p25)
1439 bool hasTrivialMoveAssignment() const {
1440 return hasMoveAssignment() &&
1441 (data().HasTrivialSpecialMembers & SMF_MoveAssignment);
1442 }
1443
1444 /// Determine whether this class has a non-trivial move assignment
1445 /// operator (C++11 [class.copy]p25)
1446 bool hasNonTrivialMoveAssignment() const {
1447 return (data().DeclaredNonTrivialSpecialMembers & SMF_MoveAssignment) ||
1448 (needsImplicitMoveAssignment() &&
1449 !(data().HasTrivialSpecialMembers & SMF_MoveAssignment));
1450 }
1451
1452 /// Determine whether a defaulted default constructor for this class
1453 /// would be constexpr.
1454 bool defaultedDestructorIsConstexpr() const {
1455 return data().DefaultedDestructorIsConstexpr &&
1456 getASTContext().getLangOpts().CPlusPlus2a;
1457 }
1458
1459 /// Determine whether this class has a constexpr destructor.
1460 bool hasConstexprDestructor() const;
1461
1462 /// Determine whether this class has a trivial destructor
1463 /// (C++ [class.dtor]p3)
1464 bool hasTrivialDestructor() const {
1465 return data().HasTrivialSpecialMembers & SMF_Destructor;
1466 }
1467
1468 bool hasTrivialDestructorForCall() const {
1469 return data().HasTrivialSpecialMembersForCall & SMF_Destructor;
1470 }
1471
1472 /// Determine whether this class has a non-trivial destructor
1473 /// (C++ [class.dtor]p3)
1474 bool hasNonTrivialDestructor() const {
1475 return !(data().HasTrivialSpecialMembers & SMF_Destructor);
1476 }
1477
1478 bool hasNonTrivialDestructorForCall() const {
1479 return !(data().HasTrivialSpecialMembersForCall & SMF_Destructor);
1480 }
1481
1482 void setHasTrivialSpecialMemberForCall() {
1483 data().HasTrivialSpecialMembersForCall =
1484 (SMF_CopyConstructor | SMF_MoveConstructor | SMF_Destructor);
1485 }
1486
1487 /// Determine whether declaring a const variable with this type is ok
1488 /// per core issue 253.
1489 bool allowConstDefaultInit() const {
1490 return !data().HasUninitializedFields ||
1491 !(data().HasDefaultedDefaultConstructor ||
1492 needsImplicitDefaultConstructor());
1493 }
1494
1495 /// Determine whether this class has a destructor which has no
1496 /// semantic effect.
1497 ///
1498 /// Any such destructor will be trivial, public, defaulted and not deleted,
1499 /// and will call only irrelevant destructors.
1500 bool hasIrrelevantDestructor() const {
1501 return data().HasIrrelevantDestructor;
1502 }
1503
1504 /// Determine whether this class has a non-literal or/ volatile type
1505 /// non-static data member or base class.
1506 bool hasNonLiteralTypeFieldsOrBases() const {
1507 return data().HasNonLiteralTypeFieldsOrBases;
1508 }
1509
1510 /// Determine whether this class has a using-declaration that names
1511 /// a user-declared base class constructor.
1512 bool hasInheritedConstructor() const {
1513 return data().HasInheritedConstructor;
1514 }
1515
1516 /// Determine whether this class has a using-declaration that names
1517 /// a base class assignment operator.
1518 bool hasInheritedAssignment() const {
1519 return data().HasInheritedAssignment;
1520 }
1521
1522 /// Determine whether this class is considered trivially copyable per
1523 /// (C++11 [class]p6).
1524 bool isTriviallyCopyable() const;
1525
1526 /// Determine whether this class is considered trivial.
1527 ///
1528 /// C++11 [class]p6:
1529 /// "A trivial class is a class that has a trivial default constructor and
1530 /// is trivially copyable."
1531 bool isTrivial() const {
1532 return isTriviallyCopyable() && hasTrivialDefaultConstructor();
1533 }
1534
1535 /// Determine whether this class is a literal type.
1536 ///
1537 /// C++11 [basic.types]p10:
1538 /// A class type that has all the following properties:
1539 /// - it has a trivial destructor
1540 /// - every constructor call and full-expression in the
1541 /// brace-or-equal-intializers for non-static data members (if any) is
1542 /// a constant expression.
1543 /// - it is an aggregate type or has at least one constexpr constructor
1544 /// or constructor template that is not a copy or move constructor, and
1545 /// - all of its non-static data members and base classes are of literal
1546 /// types
1547 ///
1548 /// We resolve DR1361 by ignoring the second bullet. We resolve DR1452 by
1549 /// treating types with trivial default constructors as literal types.
1550 ///
1551 /// Only in C++17 and beyond, are lambdas literal types.
1552 bool isLiteral() const {
1553 ASTContext &Ctx = getASTContext();
1554 return (Ctx.getLangOpts().CPlusPlus2a ? hasConstexprDestructor()
1555 : hasTrivialDestructor()) &&
1556 (!isLambda() || Ctx.getLangOpts().CPlusPlus17) &&
1557 !hasNonLiteralTypeFieldsOrBases() &&
1558 (isAggregate() || isLambda() ||
1559 hasConstexprNonCopyMoveConstructor() ||
1560 hasTrivialDefaultConstructor());
1561 }
1562
1563 /// If this record is an instantiation of a member class,
1564 /// retrieves the member class from which it was instantiated.
1565 ///
1566 /// This routine will return non-null for (non-templated) member
1567 /// classes of class templates. For example, given:
1568 ///
1569 /// \code
1570 /// template<typename T>
1571 /// struct X {
1572 /// struct A { };
1573 /// };
1574 /// \endcode
1575 ///
1576 /// The declaration for X<int>::A is a (non-templated) CXXRecordDecl
1577 /// whose parent is the class template specialization X<int>. For
1578 /// this declaration, getInstantiatedFromMemberClass() will return
1579 /// the CXXRecordDecl X<T>::A. When a complete definition of
1580 /// X<int>::A is required, it will be instantiated from the
1581 /// declaration returned by getInstantiatedFromMemberClass().
1582 CXXRecordDecl *getInstantiatedFromMemberClass() const;
1583
1584 /// If this class is an instantiation of a member class of a
1585 /// class template specialization, retrieves the member specialization
1586 /// information.
1587 MemberSpecializationInfo *getMemberSpecializationInfo() const;
1588
1589 /// Specify that this record is an instantiation of the
1590 /// member class \p RD.
1591 void setInstantiationOfMemberClass(CXXRecordDecl *RD,
1592 TemplateSpecializationKind TSK);
1593
1594 /// Retrieves the class template that is described by this
1595 /// class declaration.
1596 ///
1597 /// Every class template is represented as a ClassTemplateDecl and a
1598 /// CXXRecordDecl. The former contains template properties (such as
1599 /// the template parameter lists) while the latter contains the
1600 /// actual description of the template's
1601 /// contents. ClassTemplateDecl::getTemplatedDecl() retrieves the
1602 /// CXXRecordDecl that from a ClassTemplateDecl, while
1603 /// getDescribedClassTemplate() retrieves the ClassTemplateDecl from
1604 /// a CXXRecordDecl.
1605 ClassTemplateDecl *getDescribedClassTemplate() const;
1606
1607 void setDescribedClassTemplate(ClassTemplateDecl *Template);
1608
1609 /// Determine whether this particular class is a specialization or
1610 /// instantiation of a class template or member class of a class template,
1611 /// and how it was instantiated or specialized.
1612 TemplateSpecializationKind getTemplateSpecializationKind() const;
1613
1614 /// Set the kind of specialization or template instantiation this is.
1615 void setTemplateSpecializationKind(TemplateSpecializationKind TSK);
1616
1617 /// Retrieve the record declaration from which this record could be
1618 /// instantiated. Returns null if this class is not a template instantiation.
1619 const CXXRecordDecl *getTemplateInstantiationPattern() const;
1620
1621 CXXRecordDecl *getTemplateInstantiationPattern() {
1622 return const_cast<CXXRecordDecl *>(const_cast<const CXXRecordDecl *>(this)
1623 ->getTemplateInstantiationPattern());
1624 }
1625
1626 /// Returns the destructor decl for this class.
1627 CXXDestructorDecl *getDestructor() const;
1628
1629 /// Returns true if the class destructor, or any implicitly invoked
1630 /// destructors are marked noreturn.
1631 bool isAnyDestructorNoReturn() const;
1632
1633 /// If the class is a local class [class.local], returns
1634 /// the enclosing function declaration.
1635 const FunctionDecl *isLocalClass() const {
1636 if (const auto *RD = dyn_cast<CXXRecordDecl>(getDeclContext()))
1637 return RD->isLocalClass();
1638
1639 return dyn_cast<FunctionDecl>(getDeclContext());
1640 }
1641
1642 FunctionDecl *isLocalClass() {
1643 return const_cast<FunctionDecl*>(
1644 const_cast<const CXXRecordDecl*>(this)->isLocalClass());
1645 }
1646
1647 /// Determine whether this dependent class is a current instantiation,
1648 /// when viewed from within the given context.
1649 bool isCurrentInstantiation(const DeclContext *CurContext) const;
1650
1651 /// Determine whether this class is derived from the class \p Base.
1652 ///
1653 /// This routine only determines whether this class is derived from \p Base,
1654 /// but does not account for factors that may make a Derived -> Base class
1655 /// ill-formed, such as private/protected inheritance or multiple, ambiguous
1656 /// base class subobjects.
1657 ///
1658 /// \param Base the base class we are searching for.
1659 ///
1660 /// \returns true if this class is derived from Base, false otherwise.
1661 bool isDerivedFrom(const CXXRecordDecl *Base) const;
1662
1663 /// Determine whether this class is derived from the type \p Base.
1664 ///
1665 /// This routine only determines whether this class is derived from \p Base,
1666 /// but does not account for factors that may make a Derived -> Base class
1667 /// ill-formed, such as private/protected inheritance or multiple, ambiguous
1668 /// base class subobjects.
1669 ///
1670 /// \param Base the base class we are searching for.
1671 ///
1672 /// \param Paths will contain the paths taken from the current class to the
1673 /// given \p Base class.
1674 ///
1675 /// \returns true if this class is derived from \p Base, false otherwise.
1676 ///
1677 /// \todo add a separate parameter to configure IsDerivedFrom, rather than
1678 /// tangling input and output in \p Paths
1679 bool isDerivedFrom(const CXXRecordDecl *Base, CXXBasePaths &Paths) const;
1680
1681 /// Determine whether this class is virtually derived from
1682 /// the class \p Base.
1683 ///
1684 /// This routine only determines whether this class is virtually
1685 /// derived from \p Base, but does not account for factors that may
1686 /// make a Derived -> Base class ill-formed, such as
1687 /// private/protected inheritance or multiple, ambiguous base class
1688 /// subobjects.
1689 ///
1690 /// \param Base the base class we are searching for.
1691 ///
1692 /// \returns true if this class is virtually derived from Base,
1693 /// false otherwise.
1694 bool isVirtuallyDerivedFrom(const CXXRecordDecl *Base) const;
1695
1696 /// Determine whether this class is provably not derived from
1697 /// the type \p Base.
1698 bool isProvablyNotDerivedFrom(const CXXRecordDecl *Base) const;
1699
1700 /// Function type used by forallBases() as a callback.
1701 ///
1702 /// \param BaseDefinition the definition of the base class
1703 ///
1704 /// \returns true if this base matched the search criteria
1705 using ForallBasesCallback =
1706 llvm::function_ref<bool(const CXXRecordDecl *BaseDefinition)>;
1707
1708 /// Determines if the given callback holds for all the direct
1709 /// or indirect base classes of this type.
1710 ///
1711 /// The class itself does not count as a base class. This routine
1712 /// returns false if the class has non-computable base classes.
1713 ///
1714 /// \param BaseMatches Callback invoked for each (direct or indirect) base
1715 /// class of this type, or if \p AllowShortCircuit is true then until a call
1716 /// returns false.
1717 ///
1718 /// \param AllowShortCircuit if false, forces the callback to be called
1719 /// for every base class, even if a dependent or non-matching base was
1720 /// found.
1721 bool forallBases(ForallBasesCallback BaseMatches,
1722 bool AllowShortCircuit = true) const;
1723
1724 /// Function type used by lookupInBases() to determine whether a
1725 /// specific base class subobject matches the lookup criteria.
1726 ///
1727 /// \param Specifier the base-class specifier that describes the inheritance
1728 /// from the base class we are trying to match.
1729 ///
1730 /// \param Path the current path, from the most-derived class down to the
1731 /// base named by the \p Specifier.
1732 ///
1733 /// \returns true if this base matched the search criteria, false otherwise.
1734 using BaseMatchesCallback =
1735 llvm::function_ref<bool(const CXXBaseSpecifier *Specifier,
1736 CXXBasePath &Path)>;
1737
1738 /// Look for entities within the base classes of this C++ class,
1739 /// transitively searching all base class subobjects.
1740 ///
1741 /// This routine uses the callback function \p BaseMatches to find base
1742 /// classes meeting some search criteria, walking all base class subobjects
1743 /// and populating the given \p Paths structure with the paths through the
1744 /// inheritance hierarchy that resulted in a match. On a successful search,
1745 /// the \p Paths structure can be queried to retrieve the matching paths and
1746 /// to determine if there were any ambiguities.
1747 ///
1748 /// \param BaseMatches callback function used to determine whether a given
1749 /// base matches the user-defined search criteria.
1750 ///
1751 /// \param Paths used to record the paths from this class to its base class
1752 /// subobjects that match the search criteria.
1753 ///
1754 /// \param LookupInDependent can be set to true to extend the search to
1755 /// dependent base classes.
1756 ///
1757 /// \returns true if there exists any path from this class to a base class
1758 /// subobject that matches the search criteria.
1759 bool lookupInBases(BaseMatchesCallback BaseMatches, CXXBasePaths &Paths,
1760 bool LookupInDependent = false) const;
1761
1762 /// Base-class lookup callback that determines whether the given
1763 /// base class specifier refers to a specific class declaration.
1764 ///
1765 /// This callback can be used with \c lookupInBases() to determine whether
1766 /// a given derived class has is a base class subobject of a particular type.
1767 /// The base record pointer should refer to the canonical CXXRecordDecl of the
1768 /// base class that we are searching for.
1769 static bool FindBaseClass(const CXXBaseSpecifier *Specifier,
1770 CXXBasePath &Path, const CXXRecordDecl *BaseRecord);
1771
1772 /// Base-class lookup callback that determines whether the
1773 /// given base class specifier refers to a specific class
1774 /// declaration and describes virtual derivation.
1775 ///
1776 /// This callback can be used with \c lookupInBases() to determine
1777 /// whether a given derived class has is a virtual base class
1778 /// subobject of a particular type. The base record pointer should
1779 /// refer to the canonical CXXRecordDecl of the base class that we
1780 /// are searching for.
1781 static bool FindVirtualBaseClass(const CXXBaseSpecifier *Specifier,
1782 CXXBasePath &Path,
1783 const CXXRecordDecl *BaseRecord);
1784
1785 /// Base-class lookup callback that determines whether there exists
1786 /// a tag with the given name.
1787 ///
1788 /// This callback can be used with \c lookupInBases() to find tag members
1789 /// of the given name within a C++ class hierarchy.
1790 static bool FindTagMember(const CXXBaseSpecifier *Specifier,
1791 CXXBasePath &Path, DeclarationName Name);
1792
1793 /// Base-class lookup callback that determines whether there exists
1794 /// a member with the given name.
1795 ///
1796 /// This callback can be used with \c lookupInBases() to find members
1797 /// of the given name within a C++ class hierarchy.
1798 static bool FindOrdinaryMember(const CXXBaseSpecifier *Specifier,
1799 CXXBasePath &Path, DeclarationName Name);
1800
1801 /// Base-class lookup callback that determines whether there exists
1802 /// a member with the given name.
1803 ///
1804 /// This callback can be used with \c lookupInBases() to find members
1805 /// of the given name within a C++ class hierarchy, including dependent
1806 /// classes.
1807 static bool
1808 FindOrdinaryMemberInDependentClasses(const CXXBaseSpecifier *Specifier,
1809 CXXBasePath &Path, DeclarationName Name);
1810
1811 /// Base-class lookup callback that determines whether there exists
1812 /// an OpenMP declare reduction member with the given name.
1813 ///
1814 /// This callback can be used with \c lookupInBases() to find members
1815 /// of the given name within a C++ class hierarchy.
1816 static bool FindOMPReductionMember(const CXXBaseSpecifier *Specifier,
1817 CXXBasePath &Path, DeclarationName Name);
1818
1819 /// Base-class lookup callback that determines whether there exists
1820 /// an OpenMP declare mapper member with the given name.
1821 ///
1822 /// This callback can be used with \c lookupInBases() to find members
1823 /// of the given name within a C++ class hierarchy.
1824 static bool FindOMPMapperMember(const CXXBaseSpecifier *Specifier,
1825 CXXBasePath &Path, DeclarationName Name);
1826
1827 /// Base-class lookup callback that determines whether there exists
1828 /// a member with the given name that can be used in a nested-name-specifier.
1829 ///
1830 /// This callback can be used with \c lookupInBases() to find members of
1831 /// the given name within a C++ class hierarchy that can occur within
1832 /// nested-name-specifiers.
1833 static bool FindNestedNameSpecifierMember(const CXXBaseSpecifier *Specifier,
1834 CXXBasePath &Path,
1835 DeclarationName Name);
1836
1837 /// Retrieve the final overriders for each virtual member
1838 /// function in the class hierarchy where this class is the
1839 /// most-derived class in the class hierarchy.
1840 void getFinalOverriders(CXXFinalOverriderMap &FinaOverriders) const;
1841
1842 /// Get the indirect primary bases for this class.
1843 void getIndirectPrimaryBases(CXXIndirectPrimaryBaseSet& Bases) const;
1844
1845 /// Performs an imprecise lookup of a dependent name in this class.
1846 ///
1847 /// This function does not follow strict semantic rules and should be used
1848 /// only when lookup rules can be relaxed, e.g. indexing.
1849 std::vector<const NamedDecl *>
1850 lookupDependentName(const DeclarationName &Name,
1851 llvm::function_ref<bool(const NamedDecl *ND)> Filter);
1852
1853 /// Renders and displays an inheritance diagram
1854 /// for this C++ class and all of its base classes (transitively) using
1855 /// GraphViz.
1856 void viewInheritance(ASTContext& Context) const;
1857
1858 /// Calculates the access of a decl that is reached
1859 /// along a path.
1860 static AccessSpecifier MergeAccess(AccessSpecifier PathAccess,
1861 AccessSpecifier DeclAccess) {
1862 assert(DeclAccess != AS_none)((DeclAccess != AS_none) ? static_cast<void> (0) : __assert_fail
("DeclAccess != AS_none", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 1862, __PRETTY_FUNCTION__))
;
1863 if (DeclAccess == AS_private) return AS_none;
1864 return (PathAccess > DeclAccess ? PathAccess : DeclAccess);
1865 }
1866
1867 /// Indicates that the declaration of a defaulted or deleted special
1868 /// member function is now complete.
1869 void finishedDefaultedOrDeletedMember(CXXMethodDecl *MD);
1870
1871 void setTrivialForCallFlags(CXXMethodDecl *MD);
1872
1873 /// Indicates that the definition of this class is now complete.
1874 void completeDefinition() override;
1875
1876 /// Indicates that the definition of this class is now complete,
1877 /// and provides a final overrider map to help determine
1878 ///
1879 /// \param FinalOverriders The final overrider map for this class, which can
1880 /// be provided as an optimization for abstract-class checking. If NULL,
1881 /// final overriders will be computed if they are needed to complete the
1882 /// definition.
1883 void completeDefinition(CXXFinalOverriderMap *FinalOverriders);
1884
1885 /// Determine whether this class may end up being abstract, even though
1886 /// it is not yet known to be abstract.
1887 ///
1888 /// \returns true if this class is not known to be abstract but has any
1889 /// base classes that are abstract. In this case, \c completeDefinition()
1890 /// will need to compute final overriders to determine whether the class is
1891 /// actually abstract.
1892 bool mayBeAbstract() const;
1893
1894 /// If this is the closure type of a lambda expression, retrieve the
1895 /// number to be used for name mangling in the Itanium C++ ABI.
1896 ///
1897 /// Zero indicates that this closure type has internal linkage, so the
1898 /// mangling number does not matter, while a non-zero value indicates which
1899 /// lambda expression this is in this particular context.
1900 unsigned getLambdaManglingNumber() const {
1901 assert(isLambda() && "Not a lambda closure type!")((isLambda() && "Not a lambda closure type!") ? static_cast
<void> (0) : __assert_fail ("isLambda() && \"Not a lambda closure type!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 1901, __PRETTY_FUNCTION__))
;
1902 return getLambdaData().ManglingNumber;
1903 }
1904
1905 /// Retrieve the declaration that provides additional context for a
1906 /// lambda, when the normal declaration context is not specific enough.
1907 ///
1908 /// Certain contexts (default arguments of in-class function parameters and
1909 /// the initializers of data members) have separate name mangling rules for
1910 /// lambdas within the Itanium C++ ABI. For these cases, this routine provides
1911 /// the declaration in which the lambda occurs, e.g., the function parameter
1912 /// or the non-static data member. Otherwise, it returns NULL to imply that
1913 /// the declaration context suffices.
1914 Decl *getLambdaContextDecl() const;
1915
1916 /// Set the mangling number and context declaration for a lambda
1917 /// class.
1918 void setLambdaMangling(unsigned ManglingNumber, Decl *ContextDecl) {
1919 getLambdaData().ManglingNumber = ManglingNumber;
1920 getLambdaData().ContextDecl = ContextDecl;
1921 }
1922
1923 /// Returns the inheritance model used for this record.
1924 MSInheritanceAttr::Spelling getMSInheritanceModel() const;
1925
1926 /// Calculate what the inheritance model would be for this class.
1927 MSInheritanceAttr::Spelling calculateInheritanceModel() const;
1928
1929 /// In the Microsoft C++ ABI, use zero for the field offset of a null data
1930 /// member pointer if we can guarantee that zero is not a valid field offset,
1931 /// or if the member pointer has multiple fields. Polymorphic classes have a
1932 /// vfptr at offset zero, so we can use zero for null. If there are multiple
1933 /// fields, we can use zero even if it is a valid field offset because
1934 /// null-ness testing will check the other fields.
1935 bool nullFieldOffsetIsZero() const {
1936 return !MSInheritanceAttr::hasOnlyOneField(/*IsMemberFunction=*/false,
1937 getMSInheritanceModel()) ||
1938 (hasDefinition() && isPolymorphic());
1939 }
1940
1941 /// Controls when vtordisps will be emitted if this record is used as a
1942 /// virtual base.
1943 MSVtorDispAttr::Mode getMSVtorDispMode() const;
1944
1945 /// Determine whether this lambda expression was known to be dependent
1946 /// at the time it was created, even if its context does not appear to be
1947 /// dependent.
1948 ///
1949 /// This flag is a workaround for an issue with parsing, where default
1950 /// arguments are parsed before their enclosing function declarations have
1951 /// been created. This means that any lambda expressions within those
1952 /// default arguments will have as their DeclContext the context enclosing
1953 /// the function declaration, which may be non-dependent even when the
1954 /// function declaration itself is dependent. This flag indicates when we
1955 /// know that the lambda is dependent despite that.
1956 bool isDependentLambda() const {
1957 return isLambda() && getLambdaData().Dependent;
1958 }
1959
1960 TypeSourceInfo *getLambdaTypeInfo() const {
1961 return getLambdaData().MethodTyInfo;
1962 }
1963
1964 // Determine whether this type is an Interface Like type for
1965 // __interface inheritance purposes.
1966 bool isInterfaceLike() const;
1967
1968 static bool classof(const Decl *D) { return classofKind(D->getKind()); }
1969 static bool classofKind(Kind K) {
1970 return K >= firstCXXRecord && K <= lastCXXRecord;
1971 }
1972};
1973
1974/// Store information needed for an explicit specifier.
1975/// used by CXXDeductionGuideDecl, CXXConstructorDecl and CXXConversionDecl.
1976class ExplicitSpecifier {
1977 llvm::PointerIntPair<Expr *, 2, ExplicitSpecKind> ExplicitSpec{
1978 nullptr, ExplicitSpecKind::ResolvedFalse};
1979
1980public:
1981 ExplicitSpecifier() = default;
1982 ExplicitSpecifier(Expr *Expression, ExplicitSpecKind Kind)
1983 : ExplicitSpec(Expression, Kind) {}
1984 ExplicitSpecKind getKind() const { return ExplicitSpec.getInt(); }
1985 const Expr *getExpr() const { return ExplicitSpec.getPointer(); }
1986 Expr *getExpr() { return ExplicitSpec.getPointer(); }
1987
1988 /// Return true if the ExplicitSpecifier isn't defaulted.
1989 bool isSpecified() const {
1990 return ExplicitSpec.getInt() != ExplicitSpecKind::ResolvedFalse ||
1991 ExplicitSpec.getPointer();
1992 }
1993
1994 /// Check for Equivalence of explicit specifiers.
1995 /// Return True if the explicit specifier are equivalent false otherwise.
1996 bool isEquivalent(const ExplicitSpecifier Other) const;
1997 /// Return true if the explicit specifier is already resolved to be explicit.
1998 bool isExplicit() const {
1999 return ExplicitSpec.getInt() == ExplicitSpecKind::ResolvedTrue;
3
Returning zero, which participates in a condition later
2000 }
2001 /// Return true if the ExplicitSpecifier isn't valid.
2002 /// This state occurs after a substitution failures.
2003 bool isInvalid() const {
2004 return ExplicitSpec.getInt() == ExplicitSpecKind::Unresolved &&
2005 !ExplicitSpec.getPointer();
2006 }
2007 void setKind(ExplicitSpecKind Kind) { ExplicitSpec.setInt(Kind); }
2008 void setExpr(Expr *E) { ExplicitSpec.setPointer(E); }
2009 // getFromDecl - retrieve the explicit specifier in the given declaration.
2010 // if the given declaration has no explicit. the returned explicit specifier
2011 // is defaulted. .isSpecified() will be false.
2012 static ExplicitSpecifier getFromDecl(FunctionDecl *Function);
2013 static const ExplicitSpecifier getFromDecl(const FunctionDecl *Function) {
2014 return getFromDecl(const_cast<FunctionDecl *>(Function));
2015 }
2016 static ExplicitSpecifier Invalid() {
2017 return ExplicitSpecifier(nullptr, ExplicitSpecKind::Unresolved);
2018 }
2019};
2020
2021/// Represents a C++ deduction guide declaration.
2022///
2023/// \code
2024/// template<typename T> struct A { A(); A(T); };
2025/// A() -> A<int>;
2026/// \endcode
2027///
2028/// In this example, there will be an explicit deduction guide from the
2029/// second line, and implicit deduction guide templates synthesized from
2030/// the constructors of \c A.
2031class CXXDeductionGuideDecl : public FunctionDecl {
2032 void anchor() override;
2033
2034private:
2035 CXXDeductionGuideDecl(ASTContext &C, DeclContext *DC, SourceLocation StartLoc,
2036 ExplicitSpecifier ES,
2037 const DeclarationNameInfo &NameInfo, QualType T,
2038 TypeSourceInfo *TInfo, SourceLocation EndLocation)
2039 : FunctionDecl(CXXDeductionGuide, C, DC, StartLoc, NameInfo, T, TInfo,
2040 SC_None, false, CSK_unspecified),
2041 ExplicitSpec(ES) {
2042 if (EndLocation.isValid())
2043 setRangeEnd(EndLocation);
2044 setIsCopyDeductionCandidate(false);
2045 }
2046
2047 ExplicitSpecifier ExplicitSpec;
2048 void setExplicitSpecifier(ExplicitSpecifier ES) { ExplicitSpec = ES; }
2049
2050public:
2051 friend class ASTDeclReader;
2052 friend class ASTDeclWriter;
2053
2054 static CXXDeductionGuideDecl *
2055 Create(ASTContext &C, DeclContext *DC, SourceLocation StartLoc,
2056 ExplicitSpecifier ES, const DeclarationNameInfo &NameInfo, QualType T,
2057 TypeSourceInfo *TInfo, SourceLocation EndLocation);
2058
2059 static CXXDeductionGuideDecl *CreateDeserialized(ASTContext &C, unsigned ID);
2060
2061 ExplicitSpecifier getExplicitSpecifier() { return ExplicitSpec; }
2062 const ExplicitSpecifier getExplicitSpecifier() const { return ExplicitSpec; }
2063
2064 /// Return true if the declartion is already resolved to be explicit.
2065 bool isExplicit() const { return ExplicitSpec.isExplicit(); }
2066
2067 /// Get the template for which this guide performs deduction.
2068 TemplateDecl *getDeducedTemplate() const {
2069 return getDeclName().getCXXDeductionGuideTemplate();
2070 }
2071
2072 void setIsCopyDeductionCandidate(bool isCDC = true) {
2073 FunctionDeclBits.IsCopyDeductionCandidate = isCDC;
2074 }
2075
2076 bool isCopyDeductionCandidate() const {
2077 return FunctionDeclBits.IsCopyDeductionCandidate;
2078 }
2079
2080 // Implement isa/cast/dyncast/etc.
2081 static bool classof(const Decl *D) { return classofKind(D->getKind()); }
2082 static bool classofKind(Kind K) { return K == CXXDeductionGuide; }
2083};
2084
2085/// Represents a static or instance method of a struct/union/class.
2086///
2087/// In the terminology of the C++ Standard, these are the (static and
2088/// non-static) member functions, whether virtual or not.
2089class CXXMethodDecl : public FunctionDecl {
2090 void anchor() override;
2091
2092protected:
2093 CXXMethodDecl(Kind DK, ASTContext &C, CXXRecordDecl *RD,
2094 SourceLocation StartLoc, const DeclarationNameInfo &NameInfo,
2095 QualType T, TypeSourceInfo *TInfo, StorageClass SC,
2096 bool isInline, ConstexprSpecKind ConstexprKind,
2097 SourceLocation EndLocation)
2098 : FunctionDecl(DK, C, RD, StartLoc, NameInfo, T, TInfo, SC, isInline,
2099 ConstexprKind) {
2100 if (EndLocation.isValid())
2101 setRangeEnd(EndLocation);
2102 }
2103
2104public:
2105 static CXXMethodDecl *Create(ASTContext &C, CXXRecordDecl *RD,
2106 SourceLocation StartLoc,
2107 const DeclarationNameInfo &NameInfo, QualType T,
2108 TypeSourceInfo *TInfo, StorageClass SC,
2109 bool isInline, ConstexprSpecKind ConstexprKind,
2110 SourceLocation EndLocation);
2111
2112 static CXXMethodDecl *CreateDeserialized(ASTContext &C, unsigned ID);
2113
2114 bool isStatic() const;
2115 bool isInstance() const { return !isStatic(); }
2116
2117 /// Returns true if the given operator is implicitly static in a record
2118 /// context.
2119 static bool isStaticOverloadedOperator(OverloadedOperatorKind OOK) {
2120 // [class.free]p1:
2121 // Any allocation function for a class T is a static member
2122 // (even if not explicitly declared static).
2123 // [class.free]p6 Any deallocation function for a class X is a static member
2124 // (even if not explicitly declared static).
2125 return OOK == OO_New || OOK == OO_Array_New || OOK == OO_Delete ||
2126 OOK == OO_Array_Delete;
2127 }
2128
2129 bool isConst() const { return getType()->castAs<FunctionType>()->isConst(); }
2130 bool isVolatile() const { return getType()->castAs<FunctionType>()->isVolatile(); }
2131
2132 bool isVirtual() const {
2133 CXXMethodDecl *CD = const_cast<CXXMethodDecl*>(this)->getCanonicalDecl();
2134
2135 // Member function is virtual if it is marked explicitly so, or if it is
2136 // declared in __interface -- then it is automatically pure virtual.
2137 if (CD->isVirtualAsWritten() || CD->isPure())
2138 return true;
2139
2140 return CD->size_overridden_methods() != 0;
2141 }
2142
2143 /// If it's possible to devirtualize a call to this method, return the called
2144 /// function. Otherwise, return null.
2145
2146 /// \param Base The object on which this virtual function is called.
2147 /// \param IsAppleKext True if we are compiling for Apple kext.
2148 CXXMethodDecl *getDevirtualizedMethod(const Expr *Base, bool IsAppleKext);
2149
2150 const CXXMethodDecl *getDevirtualizedMethod(const Expr *Base,
2151 bool IsAppleKext) const {
2152 return const_cast<CXXMethodDecl *>(this)->getDevirtualizedMethod(
2153 Base, IsAppleKext);
2154 }
2155
2156 /// Determine whether this is a usual deallocation function (C++
2157 /// [basic.stc.dynamic.deallocation]p2), which is an overloaded delete or
2158 /// delete[] operator with a particular signature. Populates \p PreventedBy
2159 /// with the declarations of the functions of the same kind if they were the
2160 /// reason for this function returning false. This is used by
2161 /// Sema::isUsualDeallocationFunction to reconsider the answer based on the
2162 /// context.
2163 bool isUsualDeallocationFunction(
2164 SmallVectorImpl<const FunctionDecl *> &PreventedBy) const;
2165
2166 /// Determine whether this is a copy-assignment operator, regardless
2167 /// of whether it was declared implicitly or explicitly.
2168 bool isCopyAssignmentOperator() const;
2169
2170 /// Determine whether this is a move assignment operator.
2171 bool isMoveAssignmentOperator() const;
2172
2173 CXXMethodDecl *getCanonicalDecl() override {
2174 return cast<CXXMethodDecl>(FunctionDecl::getCanonicalDecl());
2175 }
2176 const CXXMethodDecl *getCanonicalDecl() const {
2177 return const_cast<CXXMethodDecl*>(this)->getCanonicalDecl();
2178 }
2179
2180 CXXMethodDecl *getMostRecentDecl() {
2181 return cast<CXXMethodDecl>(
2182 static_cast<FunctionDecl *>(this)->getMostRecentDecl());
2183 }
2184 const CXXMethodDecl *getMostRecentDecl() const {
2185 return const_cast<CXXMethodDecl*>(this)->getMostRecentDecl();
2186 }
2187
2188 /// True if this method is user-declared and was not
2189 /// deleted or defaulted on its first declaration.
2190 bool isUserProvided() const {
2191 auto *DeclAsWritten = this;
2192 if (auto *Pattern = getTemplateInstantiationPattern())
2193 DeclAsWritten = cast<CXXMethodDecl>(Pattern);
2194 return !(DeclAsWritten->isDeleted() ||
2195 DeclAsWritten->getCanonicalDecl()->isDefaulted());
2196 }
2197
2198 void addOverriddenMethod(const CXXMethodDecl *MD);
2199
2200 using method_iterator = const CXXMethodDecl *const *;
2201
2202 method_iterator begin_overridden_methods() const;
2203 method_iterator end_overridden_methods() const;
2204 unsigned size_overridden_methods() const;
2205
2206 using overridden_method_range= ASTContext::overridden_method_range;
2207
2208 overridden_method_range overridden_methods() const;
2209
2210 /// Return the parent of this method declaration, which
2211 /// is the class in which this method is defined.
2212 const CXXRecordDecl *getParent() const {
2213 return cast<CXXRecordDecl>(FunctionDecl::getParent());
2214 }
2215
2216 /// Return the parent of this method declaration, which
2217 /// is the class in which this method is defined.
2218 CXXRecordDecl *getParent() {
2219 return const_cast<CXXRecordDecl *>(
2220 cast<CXXRecordDecl>(FunctionDecl::getParent()));
2221 }
2222
2223 /// Return the type of the \c this pointer.
2224 ///
2225 /// Should only be called for instance (i.e., non-static) methods. Note
2226 /// that for the call operator of a lambda closure type, this returns the
2227 /// desugared 'this' type (a pointer to the closure type), not the captured
2228 /// 'this' type.
2229 QualType getThisType() const;
2230
2231 /// Return the type of the object pointed by \c this.
2232 ///
2233 /// See getThisType() for usage restriction.
2234 QualType getThisObjectType() const;
2235
2236 static QualType getThisType(const FunctionProtoType *FPT,
2237 const CXXRecordDecl *Decl);
2238
2239 static QualType getThisObjectType(const FunctionProtoType *FPT,
2240 const CXXRecordDecl *Decl);
2241
2242 Qualifiers getMethodQualifiers() const {
2243 return getType()->castAs<FunctionProtoType>()->getMethodQuals();
2244 }
2245
2246 /// Retrieve the ref-qualifier associated with this method.
2247 ///
2248 /// In the following example, \c f() has an lvalue ref-qualifier, \c g()
2249 /// has an rvalue ref-qualifier, and \c h() has no ref-qualifier.
2250 /// @code
2251 /// struct X {
2252 /// void f() &;
2253 /// void g() &&;
2254 /// void h();
2255 /// };
2256 /// @endcode
2257 RefQualifierKind getRefQualifier() const {
2258 return getType()->castAs<FunctionProtoType>()->getRefQualifier();
2259 }
2260
2261 bool hasInlineBody() const;
2262
2263 /// Determine whether this is a lambda closure type's static member
2264 /// function that is used for the result of the lambda's conversion to
2265 /// function pointer (for a lambda with no captures).
2266 ///
2267 /// The function itself, if used, will have a placeholder body that will be
2268 /// supplied by IR generation to either forward to the function call operator
2269 /// or clone the function call operator.
2270 bool isLambdaStaticInvoker() const;
2271
2272 /// Find the method in \p RD that corresponds to this one.
2273 ///
2274 /// Find if \p RD or one of the classes it inherits from override this method.
2275 /// If so, return it. \p RD is assumed to be a subclass of the class defining
2276 /// this method (or be the class itself), unless \p MayBeBase is set to true.
2277 CXXMethodDecl *
2278 getCorrespondingMethodInClass(const CXXRecordDecl *RD,
2279 bool MayBeBase = false);
2280
2281 const CXXMethodDecl *
2282 getCorrespondingMethodInClass(const CXXRecordDecl *RD,
2283 bool MayBeBase = false) const {
2284 return const_cast<CXXMethodDecl *>(this)
2285 ->getCorrespondingMethodInClass(RD, MayBeBase);
2286 }
2287
2288 /// Find if \p RD declares a function that overrides this function, and if so,
2289 /// return it. Does not search base classes.
2290 CXXMethodDecl *getCorrespondingMethodDeclaredInClass(const CXXRecordDecl *RD,
2291 bool MayBeBase = false);
2292 const CXXMethodDecl *
2293 getCorrespondingMethodDeclaredInClass(const CXXRecordDecl *RD,
2294 bool MayBeBase = false) const {
2295 return const_cast<CXXMethodDecl *>(this)
2296 ->getCorrespondingMethodDeclaredInClass(RD, MayBeBase);
2297 }
2298
2299 // Implement isa/cast/dyncast/etc.
2300 static bool classof(const Decl *D) { return classofKind(D->getKind()); }
2301 static bool classofKind(Kind K) {
2302 return K >= firstCXXMethod && K <= lastCXXMethod;
2303 }
2304};
2305
2306/// Represents a C++ base or member initializer.
2307///
2308/// This is part of a constructor initializer that
2309/// initializes one non-static member variable or one base class. For
2310/// example, in the following, both 'A(a)' and 'f(3.14159)' are member
2311/// initializers:
2312///
2313/// \code
2314/// class A { };
2315/// class B : public A {
2316/// float f;
2317/// public:
2318/// B(A& a) : A(a), f(3.14159) { }
2319/// };
2320/// \endcode
2321class CXXCtorInitializer final {
2322 /// Either the base class name/delegating constructor type (stored as
2323 /// a TypeSourceInfo*), an normal field (FieldDecl), or an anonymous field
2324 /// (IndirectFieldDecl*) being initialized.
2325 llvm::PointerUnion3<TypeSourceInfo *, FieldDecl *, IndirectFieldDecl *>
2326 Initializee;
2327
2328 /// The source location for the field name or, for a base initializer
2329 /// pack expansion, the location of the ellipsis.
2330 ///
2331 /// In the case of a delegating
2332 /// constructor, it will still include the type's source location as the
2333 /// Initializee points to the CXXConstructorDecl (to allow loop detection).
2334 SourceLocation MemberOrEllipsisLocation;
2335
2336 /// The argument used to initialize the base or member, which may
2337 /// end up constructing an object (when multiple arguments are involved).
2338 Stmt *Init;
2339
2340 /// Location of the left paren of the ctor-initializer.
2341 SourceLocation LParenLoc;
2342
2343 /// Location of the right paren of the ctor-initializer.
2344 SourceLocation RParenLoc;
2345
2346 /// If the initializee is a type, whether that type makes this
2347 /// a delegating initialization.
2348 unsigned IsDelegating : 1;
2349
2350 /// If the initializer is a base initializer, this keeps track
2351 /// of whether the base is virtual or not.
2352 unsigned IsVirtual : 1;
2353
2354 /// Whether or not the initializer is explicitly written
2355 /// in the sources.
2356 unsigned IsWritten : 1;
2357
2358 /// If IsWritten is true, then this number keeps track of the textual order
2359 /// of this initializer in the original sources, counting from 0.
2360 unsigned SourceOrder : 13;
2361
2362public:
2363 /// Creates a new base-class initializer.
2364 explicit
2365 CXXCtorInitializer(ASTContext &Context, TypeSourceInfo *TInfo, bool IsVirtual,
2366 SourceLocation L, Expr *Init, SourceLocation R,
2367 SourceLocation EllipsisLoc);
2368
2369 /// Creates a new member initializer.
2370 explicit
2371 CXXCtorInitializer(ASTContext &Context, FieldDecl *Member,
2372 SourceLocation MemberLoc, SourceLocation L, Expr *Init,
2373 SourceLocation R);
2374
2375 /// Creates a new anonymous field initializer.
2376 explicit
2377 CXXCtorInitializer(ASTContext &Context, IndirectFieldDecl *Member,
2378 SourceLocation MemberLoc, SourceLocation L, Expr *Init,
2379 SourceLocation R);
2380
2381 /// Creates a new delegating initializer.
2382 explicit
2383 CXXCtorInitializer(ASTContext &Context, TypeSourceInfo *TInfo,
2384 SourceLocation L, Expr *Init, SourceLocation R);
2385
2386 /// \return Unique reproducible object identifier.
2387 int64_t getID(const ASTContext &Context) const;
2388
2389 /// Determine whether this initializer is initializing a base class.
2390 bool isBaseInitializer() const {
2391 return Initializee.is<TypeSourceInfo*>() && !IsDelegating;
2392 }
2393
2394 /// Determine whether this initializer is initializing a non-static
2395 /// data member.
2396 bool isMemberInitializer() const { return Initializee.is<FieldDecl*>(); }
2397
2398 bool isAnyMemberInitializer() const {
2399 return isMemberInitializer() || isIndirectMemberInitializer();
2400 }
2401
2402 bool isIndirectMemberInitializer() const {
2403 return Initializee.is<IndirectFieldDecl*>();
2404 }
2405
2406 /// Determine whether this initializer is an implicit initializer
2407 /// generated for a field with an initializer defined on the member
2408 /// declaration.
2409 ///
2410 /// In-class member initializers (also known as "non-static data member
2411 /// initializations", NSDMIs) were introduced in C++11.
2412 bool isInClassMemberInitializer() const {
2413 return Init->getStmtClass() == Stmt::CXXDefaultInitExprClass;
2414 }
2415
2416 /// Determine whether this initializer is creating a delegating
2417 /// constructor.
2418 bool isDelegatingInitializer() const {
2419 return Initializee.is<TypeSourceInfo*>() && IsDelegating;
2420 }
2421
2422 /// Determine whether this initializer is a pack expansion.
2423 bool isPackExpansion() const {
2424 return isBaseInitializer() && MemberOrEllipsisLocation.isValid();
2425 }
2426
2427 // For a pack expansion, returns the location of the ellipsis.
2428 SourceLocation getEllipsisLoc() const {
2429 assert(isPackExpansion() && "Initializer is not a pack expansion")((isPackExpansion() && "Initializer is not a pack expansion"
) ? static_cast<void> (0) : __assert_fail ("isPackExpansion() && \"Initializer is not a pack expansion\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 2429, __PRETTY_FUNCTION__))
;
2430 return MemberOrEllipsisLocation;
2431 }
2432
2433 /// If this is a base class initializer, returns the type of the
2434 /// base class with location information. Otherwise, returns an NULL
2435 /// type location.
2436 TypeLoc getBaseClassLoc() const;
2437
2438 /// If this is a base class initializer, returns the type of the base class.
2439 /// Otherwise, returns null.
2440 const Type *getBaseClass() const;
2441
2442 /// Returns whether the base is virtual or not.
2443 bool isBaseVirtual() const {
2444 assert(isBaseInitializer() && "Must call this on base initializer!")((isBaseInitializer() && "Must call this on base initializer!"
) ? static_cast<void> (0) : __assert_fail ("isBaseInitializer() && \"Must call this on base initializer!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 2444, __PRETTY_FUNCTION__))
;
2445
2446 return IsVirtual;
2447 }
2448
2449 /// Returns the declarator information for a base class or delegating
2450 /// initializer.
2451 TypeSourceInfo *getTypeSourceInfo() const {
2452 return Initializee.dyn_cast<TypeSourceInfo *>();
2453 }
2454
2455 /// If this is a member initializer, returns the declaration of the
2456 /// non-static data member being initialized. Otherwise, returns null.
2457 FieldDecl *getMember() const {
2458 if (isMemberInitializer())
2459 return Initializee.get<FieldDecl*>();
2460 return nullptr;
2461 }
2462
2463 FieldDecl *getAnyMember() const {
2464 if (isMemberInitializer())
2465 return Initializee.get<FieldDecl*>();
2466 if (isIndirectMemberInitializer())
2467 return Initializee.get<IndirectFieldDecl*>()->getAnonField();
2468 return nullptr;
2469 }
2470
2471 IndirectFieldDecl *getIndirectMember() const {
2472 if (isIndirectMemberInitializer())
2473 return Initializee.get<IndirectFieldDecl*>();
2474 return nullptr;
2475 }
2476
2477 SourceLocation getMemberLocation() const {
2478 return MemberOrEllipsisLocation;
2479 }
2480
2481 /// Determine the source location of the initializer.
2482 SourceLocation getSourceLocation() const;
2483
2484 /// Determine the source range covering the entire initializer.
2485 SourceRange getSourceRange() const LLVM_READONLY__attribute__((__pure__));
2486
2487 /// Determine whether this initializer is explicitly written
2488 /// in the source code.
2489 bool isWritten() const { return IsWritten; }
2490
2491 /// Return the source position of the initializer, counting from 0.
2492 /// If the initializer was implicit, -1 is returned.
2493 int getSourceOrder() const {
2494 return IsWritten ? static_cast<int>(SourceOrder) : -1;
2495 }
2496
2497 /// Set the source order of this initializer.
2498 ///
2499 /// This can only be called once for each initializer; it cannot be called
2500 /// on an initializer having a positive number of (implicit) array indices.
2501 ///
2502 /// This assumes that the initializer was written in the source code, and
2503 /// ensures that isWritten() returns true.
2504 void setSourceOrder(int Pos) {
2505 assert(!IsWritten &&((!IsWritten && "setSourceOrder() used on implicit initializer"
) ? static_cast<void> (0) : __assert_fail ("!IsWritten && \"setSourceOrder() used on implicit initializer\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 2506, __PRETTY_FUNCTION__))
2506 "setSourceOrder() used on implicit initializer")((!IsWritten && "setSourceOrder() used on implicit initializer"
) ? static_cast<void> (0) : __assert_fail ("!IsWritten && \"setSourceOrder() used on implicit initializer\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 2506, __PRETTY_FUNCTION__))
;
2507 assert(SourceOrder == 0 &&((SourceOrder == 0 && "calling twice setSourceOrder() on the same initializer"
) ? static_cast<void> (0) : __assert_fail ("SourceOrder == 0 && \"calling twice setSourceOrder() on the same initializer\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 2508, __PRETTY_FUNCTION__))
2508 "calling twice setSourceOrder() on the same initializer")((SourceOrder == 0 && "calling twice setSourceOrder() on the same initializer"
) ? static_cast<void> (0) : __assert_fail ("SourceOrder == 0 && \"calling twice setSourceOrder() on the same initializer\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 2508, __PRETTY_FUNCTION__))
;
2509 assert(Pos >= 0 &&((Pos >= 0 && "setSourceOrder() used to make an initializer implicit"
) ? static_cast<void> (0) : __assert_fail ("Pos >= 0 && \"setSourceOrder() used to make an initializer implicit\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 2510, __PRETTY_FUNCTION__))
2510 "setSourceOrder() used to make an initializer implicit")((Pos >= 0 && "setSourceOrder() used to make an initializer implicit"
) ? static_cast<void> (0) : __assert_fail ("Pos >= 0 && \"setSourceOrder() used to make an initializer implicit\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 2510, __PRETTY_FUNCTION__))
;
2511 IsWritten = true;
2512 SourceOrder = static_cast<unsigned>(Pos);
2513 }
2514
2515 SourceLocation getLParenLoc() const { return LParenLoc; }
2516 SourceLocation getRParenLoc() const { return RParenLoc; }
2517
2518 /// Get the initializer.
2519 Expr *getInit() const { return static_cast<Expr *>(Init); }
2520};
2521
2522/// Description of a constructor that was inherited from a base class.
2523class InheritedConstructor {
2524 ConstructorUsingShadowDecl *Shadow = nullptr;
2525 CXXConstructorDecl *BaseCtor = nullptr;
2526
2527public:
2528 InheritedConstructor() = default;
2529 InheritedConstructor(ConstructorUsingShadowDecl *Shadow,
2530 CXXConstructorDecl *BaseCtor)
2531 : Shadow(Shadow), BaseCtor(BaseCtor) {}
2532
2533 explicit operator bool() const { return Shadow; }
2534
2535 ConstructorUsingShadowDecl *getShadowDecl() const { return Shadow; }
2536 CXXConstructorDecl *getConstructor() const { return BaseCtor; }
2537};
2538
2539/// Represents a C++ constructor within a class.
2540///
2541/// For example:
2542///
2543/// \code
2544/// class X {
2545/// public:
2546/// explicit X(int); // represented by a CXXConstructorDecl.
2547/// };
2548/// \endcode
2549class CXXConstructorDecl final
2550 : public CXXMethodDecl,
2551 private llvm::TrailingObjects<CXXConstructorDecl, InheritedConstructor,
2552 ExplicitSpecifier> {
2553 // This class stores some data in DeclContext::CXXConstructorDeclBits
2554 // to save some space. Use the provided accessors to access it.
2555
2556 /// \name Support for base and member initializers.
2557 /// \{
2558 /// The arguments used to initialize the base or member.
2559 LazyCXXCtorInitializersPtr CtorInitializers;
2560
2561 CXXConstructorDecl(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
2562 const DeclarationNameInfo &NameInfo, QualType T,
2563 TypeSourceInfo *TInfo, ExplicitSpecifier ES, bool isInline,
2564 bool isImplicitlyDeclared, ConstexprSpecKind ConstexprKind,
2565 InheritedConstructor Inherited);
2566
2567 void anchor() override;
2568
2569 size_t numTrailingObjects(OverloadToken<InheritedConstructor>) const {
2570 return CXXConstructorDeclBits.IsInheritingConstructor;
2571 }
2572 size_t numTrailingObjects(OverloadToken<ExplicitSpecifier>) const {
2573 return CXXConstructorDeclBits.HasTrailingExplicitSpecifier;
2574 }
2575
2576 ExplicitSpecifier getExplicitSpecifierInternal() const {
2577 if (CXXConstructorDeclBits.HasTrailingExplicitSpecifier)
2578 return *getTrailingObjects<ExplicitSpecifier>();
2579 return ExplicitSpecifier(
2580 nullptr, CXXConstructorDeclBits.IsSimpleExplicit
2581 ? ExplicitSpecKind::ResolvedTrue
2582 : ExplicitSpecKind::ResolvedFalse);
2583 }
2584
2585 void setExplicitSpecifier(ExplicitSpecifier ES) {
2586 assert((!ES.getExpr() ||(((!ES.getExpr() || CXXConstructorDeclBits.HasTrailingExplicitSpecifier
) && "cannot set this explicit specifier. no trail-allocated space for "
"explicit") ? static_cast<void> (0) : __assert_fail ("(!ES.getExpr() || CXXConstructorDeclBits.HasTrailingExplicitSpecifier) && \"cannot set this explicit specifier. no trail-allocated space for \" \"explicit\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 2589, __PRETTY_FUNCTION__))
2587 CXXConstructorDeclBits.HasTrailingExplicitSpecifier) &&(((!ES.getExpr() || CXXConstructorDeclBits.HasTrailingExplicitSpecifier
) && "cannot set this explicit specifier. no trail-allocated space for "
"explicit") ? static_cast<void> (0) : __assert_fail ("(!ES.getExpr() || CXXConstructorDeclBits.HasTrailingExplicitSpecifier) && \"cannot set this explicit specifier. no trail-allocated space for \" \"explicit\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 2589, __PRETTY_FUNCTION__))
2588 "cannot set this explicit specifier. no trail-allocated space for "(((!ES.getExpr() || CXXConstructorDeclBits.HasTrailingExplicitSpecifier
) && "cannot set this explicit specifier. no trail-allocated space for "
"explicit") ? static_cast<void> (0) : __assert_fail ("(!ES.getExpr() || CXXConstructorDeclBits.HasTrailingExplicitSpecifier) && \"cannot set this explicit specifier. no trail-allocated space for \" \"explicit\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 2589, __PRETTY_FUNCTION__))
2589 "explicit")(((!ES.getExpr() || CXXConstructorDeclBits.HasTrailingExplicitSpecifier
) && "cannot set this explicit specifier. no trail-allocated space for "
"explicit") ? static_cast<void> (0) : __assert_fail ("(!ES.getExpr() || CXXConstructorDeclBits.HasTrailingExplicitSpecifier) && \"cannot set this explicit specifier. no trail-allocated space for \" \"explicit\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 2589, __PRETTY_FUNCTION__))
;
2590 if (ES.getExpr())
2591 *getCanonicalDecl()->getTrailingObjects<ExplicitSpecifier>() = ES;
2592 else
2593 CXXConstructorDeclBits.IsSimpleExplicit = ES.isExplicit();
2594 }
2595
2596 enum TraillingAllocKind {
2597 TAKInheritsConstructor = 1,
2598 TAKHasTailExplicit = 1 << 1,
2599 };
2600
2601 uint64_t getTraillingAllocKind() const {
2602 return numTrailingObjects(OverloadToken<InheritedConstructor>()) |
2603 (numTrailingObjects(OverloadToken<ExplicitSpecifier>()) << 1);
2604 }
2605
2606public:
2607 friend class ASTDeclReader;
2608 friend class ASTDeclWriter;
2609 friend TrailingObjects;
2610
2611 static CXXConstructorDecl *CreateDeserialized(ASTContext &C, unsigned ID,
2612 uint64_t AllocKind);
2613 static CXXConstructorDecl *
2614 Create(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
2615 const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo,
2616 ExplicitSpecifier ES, bool isInline, bool isImplicitlyDeclared,
2617 ConstexprSpecKind ConstexprKind,
2618 InheritedConstructor Inherited = InheritedConstructor());
2619
2620 ExplicitSpecifier getExplicitSpecifier() {
2621 return getCanonicalDecl()->getExplicitSpecifierInternal();
2622 }
2623 const ExplicitSpecifier getExplicitSpecifier() const {
2624 return getCanonicalDecl()->getExplicitSpecifierInternal();
2625 }
2626
2627 /// Return true if the declartion is already resolved to be explicit.
2628 bool isExplicit() const { return getExplicitSpecifier().isExplicit(); }
2
Calling 'ExplicitSpecifier::isExplicit'
4
Returning from 'ExplicitSpecifier::isExplicit'
5
Returning zero, which participates in a condition later
2629
2630 /// Iterates through the member/base initializer list.
2631 using init_iterator = CXXCtorInitializer **;
2632
2633 /// Iterates through the member/base initializer list.
2634 using init_const_iterator = CXXCtorInitializer *const *;
2635
2636 using init_range = llvm::iterator_range<init_iterator>;
2637 using init_const_range = llvm::iterator_range<init_const_iterator>;
2638
2639 init_range inits() { return init_range(init_begin(), init_end()); }
2640 init_const_range inits() const {
2641 return init_const_range(init_begin(), init_end());
2642 }
2643
2644 /// Retrieve an iterator to the first initializer.
2645 init_iterator init_begin() {
2646 const auto *ConstThis = this;
2647 return const_cast<init_iterator>(ConstThis->init_begin());
2648 }
2649
2650 /// Retrieve an iterator to the first initializer.
2651 init_const_iterator init_begin() const;
2652
2653 /// Retrieve an iterator past the last initializer.
2654 init_iterator init_end() {
2655 return init_begin() + getNumCtorInitializers();
2656 }
2657
2658 /// Retrieve an iterator past the last initializer.
2659 init_const_iterator init_end() const {
2660 return init_begin() + getNumCtorInitializers();
2661 }
2662
2663 using init_reverse_iterator = std::reverse_iterator<init_iterator>;
2664 using init_const_reverse_iterator =
2665 std::reverse_iterator<init_const_iterator>;
2666
2667 init_reverse_iterator init_rbegin() {
2668 return init_reverse_iterator(init_end());
2669 }
2670 init_const_reverse_iterator init_rbegin() const {
2671 return init_const_reverse_iterator(init_end());
2672 }
2673
2674 init_reverse_iterator init_rend() {
2675 return init_reverse_iterator(init_begin());
2676 }
2677 init_const_reverse_iterator init_rend() const {
2678 return init_const_reverse_iterator(init_begin());
2679 }
2680
2681 /// Determine the number of arguments used to initialize the member
2682 /// or base.
2683 unsigned getNumCtorInitializers() const {
2684 return CXXConstructorDeclBits.NumCtorInitializers;
2685 }
2686
2687 void setNumCtorInitializers(unsigned numCtorInitializers) {
2688 CXXConstructorDeclBits.NumCtorInitializers = numCtorInitializers;
2689 // This assert added because NumCtorInitializers is stored
2690 // in CXXConstructorDeclBits as a bitfield and its width has
2691 // been shrunk from 32 bits to fit into CXXConstructorDeclBitfields.
2692 assert(CXXConstructorDeclBits.NumCtorInitializers ==((CXXConstructorDeclBits.NumCtorInitializers == numCtorInitializers
&& "NumCtorInitializers overflow!") ? static_cast<
void> (0) : __assert_fail ("CXXConstructorDeclBits.NumCtorInitializers == numCtorInitializers && \"NumCtorInitializers overflow!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 2693, __PRETTY_FUNCTION__))
2693 numCtorInitializers && "NumCtorInitializers overflow!")((CXXConstructorDeclBits.NumCtorInitializers == numCtorInitializers
&& "NumCtorInitializers overflow!") ? static_cast<
void> (0) : __assert_fail ("CXXConstructorDeclBits.NumCtorInitializers == numCtorInitializers && \"NumCtorInitializers overflow!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 2693, __PRETTY_FUNCTION__))
;
2694 }
2695
2696 void setCtorInitializers(CXXCtorInitializer **Initializers) {
2697 CtorInitializers = Initializers;
2698 }
2699
2700 /// Determine whether this constructor is a delegating constructor.
2701 bool isDelegatingConstructor() const {
2702 return (getNumCtorInitializers() == 1) &&
2703 init_begin()[0]->isDelegatingInitializer();
2704 }
2705
2706 /// When this constructor delegates to another, retrieve the target.
2707 CXXConstructorDecl *getTargetConstructor() const;
2708
2709 /// Whether this constructor is a default
2710 /// constructor (C++ [class.ctor]p5), which can be used to
2711 /// default-initialize a class of this type.
2712 bool isDefaultConstructor() const;
2713
2714 /// Whether this constructor is a copy constructor (C++ [class.copy]p2,
2715 /// which can be used to copy the class.
2716 ///
2717 /// \p TypeQuals will be set to the qualifiers on the
2718 /// argument type. For example, \p TypeQuals would be set to \c
2719 /// Qualifiers::Const for the following copy constructor:
2720 ///
2721 /// \code
2722 /// class X {
2723 /// public:
2724 /// X(const X&);
2725 /// };
2726 /// \endcode
2727 bool isCopyConstructor(unsigned &TypeQuals) const;
2728
2729 /// Whether this constructor is a copy
2730 /// constructor (C++ [class.copy]p2, which can be used to copy the
2731 /// class.
2732 bool isCopyConstructor() const {
2733 unsigned TypeQuals = 0;