Bug Summary

File:build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/clang/lib/AST/QualTypeNames.cpp
Warning:line 308, column 36
Called C++ object pointer is null

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name QualTypeNames.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 -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mframe-pointer=none -relaxed-aliasing -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -ffunction-sections -fdata-sections -fcoverage-compilation-dir=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/build-llvm -resource-dir /usr/lib/llvm-15/lib/clang/15.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I tools/clang/lib/AST -I /build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/clang/lib/AST -I /build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/clang/include -I tools/clang/include -I include -I /build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/llvm/include -D _FORTIFY_SOURCE=2 -D NDEBUG -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/x86_64-linux-gnu/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/backward -internal-isystem /usr/lib/llvm-15/lib/clang/15.0.0/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fmacro-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/build-llvm=build-llvm -fmacro-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/= -fcoverage-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/build-llvm=build-llvm -fcoverage-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/= -O3 -Wno-unused-command-line-argument -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/build-llvm -fdebug-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/build-llvm=build-llvm -fdebug-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/= -ferror-limit 19 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -fcolor-diagnostics -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2022-04-20-140412-16051-1 -x c++ /build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/clang/lib/AST/QualTypeNames.cpp
1//===------- QualTypeNames.cpp - Generate Complete QualType Names ---------===//
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#include "clang/AST/DeclTemplate.h"
10#include "clang/AST/DeclarationName.h"
11#include "clang/AST/GlobalDecl.h"
12#include "clang/AST/Mangle.h"
13#include "clang/AST/QualTypeNames.h"
14
15#include <stdio.h>
16#include <memory>
17
18namespace clang {
19
20namespace TypeName {
21
22/// Create a NestedNameSpecifier for Namesp and its enclosing
23/// scopes.
24///
25/// \param[in] Ctx - the AST Context to be used.
26/// \param[in] Namesp - the NamespaceDecl for which a NestedNameSpecifier
27/// is requested.
28/// \param[in] WithGlobalNsPrefix - Indicate whether the global namespace
29/// specifier "::" should be prepended or not.
30static NestedNameSpecifier *createNestedNameSpecifier(
31 const ASTContext &Ctx,
32 const NamespaceDecl *Namesp,
33 bool WithGlobalNsPrefix);
34
35/// Create a NestedNameSpecifier for TagDecl and its enclosing
36/// scopes.
37///
38/// \param[in] Ctx - the AST Context to be used.
39/// \param[in] TD - the TagDecl for which a NestedNameSpecifier is
40/// requested.
41/// \param[in] FullyQualify - Convert all template arguments into fully
42/// qualified names.
43/// \param[in] WithGlobalNsPrefix - Indicate whether the global namespace
44/// specifier "::" should be prepended or not.
45static NestedNameSpecifier *createNestedNameSpecifier(
46 const ASTContext &Ctx, const TypeDecl *TD,
47 bool FullyQualify, bool WithGlobalNsPrefix);
48
49static NestedNameSpecifier *createNestedNameSpecifierForScopeOf(
50 const ASTContext &Ctx, const Decl *decl,
51 bool FullyQualified, bool WithGlobalNsPrefix);
52
53static NestedNameSpecifier *getFullyQualifiedNestedNameSpecifier(
54 const ASTContext &Ctx, NestedNameSpecifier *scope, bool WithGlobalNsPrefix);
55
56static bool getFullyQualifiedTemplateName(const ASTContext &Ctx,
57 TemplateName &TName,
58 bool WithGlobalNsPrefix) {
59 bool Changed = false;
60 NestedNameSpecifier *NNS = nullptr;
61
62 TemplateDecl *ArgTDecl = TName.getAsTemplateDecl();
63 // ArgTDecl won't be NULL because we asserted that this isn't a
64 // dependent context very early in the call chain.
65 assert(ArgTDecl != nullptr)(static_cast <bool> (ArgTDecl != nullptr) ? void (0) : __assert_fail
("ArgTDecl != nullptr", "clang/lib/AST/QualTypeNames.cpp", 65
, __extension__ __PRETTY_FUNCTION__));
1
Assuming the condition is true
→
2
←
'?' condition is true
→
66 QualifiedTemplateName *QTName = TName.getAsQualifiedTemplateName();
67
68 if (QTName && !QTName->hasTemplateKeyword()) {
3
←
Assuming 'QTName' is null
→
69 NNS = QTName->getQualifier();
70 NestedNameSpecifier *QNNS = getFullyQualifiedNestedNameSpecifier(
71 Ctx, NNS, WithGlobalNsPrefix);
72 if (QNNS != NNS) {
73 Changed = true;
74 NNS = QNNS;
75 } else {
76 NNS = nullptr;
77 }
78 } else {
79 NNS = createNestedNameSpecifierForScopeOf(
4
←
Calling 'createNestedNameSpecifierForScopeOf'
→
80 Ctx, ArgTDecl, true, WithGlobalNsPrefix);
81 }
82 if (NNS) {
83 TName = Ctx.getQualifiedTemplateName(NNS,
84 /*TemplateKeyword=*/false, ArgTDecl);
85 Changed = true;
86 }
87 return Changed;
88}
89
90static bool getFullyQualifiedTemplateArgument(const ASTContext &Ctx,
91 TemplateArgument &Arg,
92 bool WithGlobalNsPrefix) {
93 bool Changed = false;
94
95 // Note: we do not handle TemplateArgument::Expression, to replace it
96 // we need the information for the template instance decl.
97
98 if (Arg.getKind() == TemplateArgument::Template) {
99 TemplateName TName = Arg.getAsTemplate();
100 Changed = getFullyQualifiedTemplateName(Ctx, TName, WithGlobalNsPrefix);
101 if (Changed) {
102 Arg = TemplateArgument(TName);
103 }
104 } else if (Arg.getKind() == TemplateArgument::Type) {
105 QualType SubTy = Arg.getAsType();
106 // Check if the type needs more desugaring and recurse.
107 QualType QTFQ = getFullyQualifiedType(SubTy, Ctx, WithGlobalNsPrefix);
108 if (QTFQ != SubTy) {
109 Arg = TemplateArgument(QTFQ);
110 Changed = true;
111 }
112 }
113 return Changed;
114}
115
116static const Type *getFullyQualifiedTemplateType(const ASTContext &Ctx,
117 const Type *TypePtr,
118 bool WithGlobalNsPrefix) {
119 // DependentTemplateTypes exist within template declarations and
120 // definitions. Therefore we shouldn't encounter them at the end of
121 // a translation unit. If we do, the caller has made an error.
122 assert(!isa<DependentTemplateSpecializationType>(TypePtr))(static_cast <bool> (!isa<DependentTemplateSpecializationType
>(TypePtr)) ? void (0) : __assert_fail ("!isa<DependentTemplateSpecializationType>(TypePtr)"
, "clang/lib/AST/QualTypeNames.cpp", 122, __extension__ __PRETTY_FUNCTION__
));
123 // In case of template specializations, iterate over the arguments
124 // and fully qualify them as well.
125 if (const auto *TST = dyn_cast<const TemplateSpecializationType>(TypePtr)) {
126 bool MightHaveChanged = false;
127 SmallVector<TemplateArgument, 4> FQArgs;
128 for (TemplateSpecializationType::iterator I = TST->begin(), E = TST->end();
129 I != E; ++I) {
130 // Cheap to copy and potentially modified by
131 // getFullyQualifedTemplateArgument.
132 TemplateArgument Arg(*I);
133 MightHaveChanged |= getFullyQualifiedTemplateArgument(
134 Ctx, Arg, WithGlobalNsPrefix);
135 FQArgs.push_back(Arg);
136 }
137
138 // If a fully qualified arg is different from the unqualified arg,
139 // allocate new type in the AST.
140 if (MightHaveChanged) {
141 QualType QT = Ctx.getTemplateSpecializationType(
142 TST->getTemplateName(), FQArgs,
143 TST->getCanonicalTypeInternal());
144 // getTemplateSpecializationType returns a fully qualified
145 // version of the specialization itself, so no need to qualify
146 // it.
147 return QT.getTypePtr();
148 }
149 } else if (const auto *TSTRecord = dyn_cast<const RecordType>(TypePtr)) {
150 // We are asked to fully qualify and we have a Record Type,
151 // which can point to a template instantiation with no sugar in any of
152 // its template argument, however we still need to fully qualify them.
153
154 if (const auto *TSTDecl =
155 dyn_cast<ClassTemplateSpecializationDecl>(TSTRecord->getDecl())) {
156 const TemplateArgumentList &TemplateArgs = TSTDecl->getTemplateArgs();
157
158 bool MightHaveChanged = false;
159 SmallVector<TemplateArgument, 4> FQArgs;
160 for (unsigned int I = 0, E = TemplateArgs.size(); I != E; ++I) {
161 // cheap to copy and potentially modified by
162 // getFullyQualifedTemplateArgument
163 TemplateArgument Arg(TemplateArgs[I]);
164 MightHaveChanged |= getFullyQualifiedTemplateArgument(
165 Ctx, Arg, WithGlobalNsPrefix);
166 FQArgs.push_back(Arg);
167 }
168
169 // If a fully qualified arg is different from the unqualified arg,
170 // allocate new type in the AST.
171 if (MightHaveChanged) {
172 TemplateName TN(TSTDecl->getSpecializedTemplate());
173 QualType QT = Ctx.getTemplateSpecializationType(
174 TN, FQArgs,
175 TSTRecord->getCanonicalTypeInternal());
176 // getTemplateSpecializationType returns a fully qualified
177 // version of the specialization itself, so no need to qualify
178 // it.
179 return QT.getTypePtr();
180 }
181 }
182 }
183 return TypePtr;
184}
185
186static NestedNameSpecifier *createOuterNNS(const ASTContext &Ctx, const Decl *D,
187 bool FullyQualify,
188 bool WithGlobalNsPrefix) {
189 const DeclContext *DC = D->getDeclContext();
190 if (const auto *NS = dyn_cast<NamespaceDecl>(DC)) {
191 while (NS && NS->isInline()) {
192 // Ignore inline namespace;
193 NS = dyn_cast<NamespaceDecl>(NS->getDeclContext());
194 }
195 if (NS && NS->getDeclName()) {
196 return createNestedNameSpecifier(Ctx, NS, WithGlobalNsPrefix);
197 }
198 return nullptr; // no starting '::', no anonymous
199 } else if (const auto *TD = dyn_cast<TagDecl>(DC)) {
200 return createNestedNameSpecifier(Ctx, TD, FullyQualify, WithGlobalNsPrefix);
201 } else if (const auto *TDD = dyn_cast<TypedefNameDecl>(DC)) {
202 return createNestedNameSpecifier(
203 Ctx, TDD, FullyQualify, WithGlobalNsPrefix);
204 } else if (WithGlobalNsPrefix && DC->isTranslationUnit()) {
205 return NestedNameSpecifier::GlobalSpecifier(Ctx);
206 }
207 return nullptr; // no starting '::' if |WithGlobalNsPrefix| is false
208}
209
210/// Return a fully qualified version of this name specifier.
211static NestedNameSpecifier *getFullyQualifiedNestedNameSpecifier(
212 const ASTContext &Ctx, NestedNameSpecifier *Scope,
213 bool WithGlobalNsPrefix) {
214 switch (Scope->getKind()) {
215 case NestedNameSpecifier::Global:
216 // Already fully qualified
217 return Scope;
218 case NestedNameSpecifier::Namespace:
219 return TypeName::createNestedNameSpecifier(
220 Ctx, Scope->getAsNamespace(), WithGlobalNsPrefix);
221 case NestedNameSpecifier::NamespaceAlias:
222 // Namespace aliases are only valid for the duration of the
223 // scope where they were introduced, and therefore are often
224 // invalid at the end of the TU. So use the namespace name more
225 // likely to be valid at the end of the TU.
226 return TypeName::createNestedNameSpecifier(
227 Ctx,
228 Scope->getAsNamespaceAlias()->getNamespace()->getCanonicalDecl(),
229 WithGlobalNsPrefix);
230 case NestedNameSpecifier::Identifier:
231 // A function or some other construct that makes it un-namable
232 // at the end of the TU. Skip the current component of the name,
233 // but use the name of it's prefix.
234 return getFullyQualifiedNestedNameSpecifier(
235 Ctx, Scope->getPrefix(), WithGlobalNsPrefix);
236 case NestedNameSpecifier::Super:
237 case NestedNameSpecifier::TypeSpec:
238 case NestedNameSpecifier::TypeSpecWithTemplate: {
239 const Type *Type = Scope->getAsType();
240 // Find decl context.
241 const TagDecl *TD = nullptr;
242 if (const TagType *TagDeclType = Type->getAs<TagType>()) {
243 TD = TagDeclType->getDecl();
244 } else {
245 TD = Type->getAsCXXRecordDecl();
246 }
247 if (TD) {
248 return TypeName::createNestedNameSpecifier(Ctx, TD,
249 true /*FullyQualified*/,
250 WithGlobalNsPrefix);
251 } else if (const auto *TDD = dyn_cast<TypedefType>(Type)) {
252 return TypeName::createNestedNameSpecifier(Ctx, TDD->getDecl(),
253 true /*FullyQualified*/,
254 WithGlobalNsPrefix);
255 }
256 return Scope;
257 }
258 }
259 llvm_unreachable("bad NNS kind")::llvm::llvm_unreachable_internal("bad NNS kind", "clang/lib/AST/QualTypeNames.cpp"
, 259);
260}
261
262/// Create a nested name specifier for the declaring context of
263/// the type.
264static NestedNameSpecifier *createNestedNameSpecifierForScopeOf(
265 const ASTContext &Ctx, const Decl *Decl,
266 bool FullyQualified, bool WithGlobalNsPrefix) {
267 assert(Decl)(static_cast <bool> (Decl) ? void (0) : __assert_fail (
"Decl", "clang/lib/AST/QualTypeNames.cpp", 267, __extension__
__PRETTY_FUNCTION__));
5
←
'?' condition is true
→
268
269 const DeclContext *DC = Decl->getDeclContext()->getRedeclContext();
6
←
'DC' initialized here
→
270 const auto *Outer = dyn_cast_or_null<NamedDecl>(DC);
7
←
Assuming null pointer is passed into cast
→
8
←
Assuming pointer value is null
→
271 const auto *OuterNS = dyn_cast_or_null<NamespaceDecl>(DC);
9
←
Assuming null pointer is passed into cast
→
272 if (Outer
9.1
'Outer' is null
 && !(OuterNS && OuterNS->isAnonymousNamespace())) {
273 if (const auto *CxxDecl = dyn_cast<CXXRecordDecl>(DC)) {
274 if (ClassTemplateDecl *ClassTempl =
275 CxxDecl->getDescribedClassTemplate()) {
276 // We are in the case of a type(def) that was declared in a
277 // class template but is *not* type dependent. In clang, it
278 // gets attached to the class template declaration rather than
279 // any specific class template instantiation. This result in
280 // 'odd' fully qualified typename:
281 //
282 // vector<_Tp,_Alloc>::size_type
283 //
284 // Make the situation is 'useable' but looking a bit odd by
285 // picking a random instance as the declaring context.
286 if (ClassTempl->spec_begin() != ClassTempl->spec_end()) {
287 Decl = *(ClassTempl->spec_begin());
288 Outer = dyn_cast<NamedDecl>(Decl);
289 OuterNS = dyn_cast<NamespaceDecl>(Decl);
290 }
291 }
292 }
293
294 if (OuterNS) {
295 return createNestedNameSpecifier(Ctx, OuterNS, WithGlobalNsPrefix);
296 } else if (const auto *TD = dyn_cast<TagDecl>(Outer)) {
297 return createNestedNameSpecifier(
298 Ctx, TD, FullyQualified, WithGlobalNsPrefix);
299 } else if (isa<TranslationUnitDecl>(Outer)) {
300 // Context is the TU. Nothing needs to be done.
301 return nullptr;
302 } else {
303 // Decl's context was neither the TU, a namespace, nor a
304 // TagDecl, which means it is a type local to a scope, and not
305 // accessible at the end of the TU.
306 return nullptr;
307 }
308 } else if (WithGlobalNsPrefix && DC->isTranslationUnit()) {
10
←
Assuming 'WithGlobalNsPrefix' is true
→
11
←
Called C++ object pointer is null
309 return NestedNameSpecifier::GlobalSpecifier(Ctx);
310 }
311 return nullptr;
312}
313
314/// Create a nested name specifier for the declaring context of
315/// the type.
316static NestedNameSpecifier *createNestedNameSpecifierForScopeOf(
317 const ASTContext &Ctx, const Type *TypePtr,
318 bool FullyQualified, bool WithGlobalNsPrefix) {
319 if (!TypePtr) return nullptr;
320
321 Decl *Decl = nullptr;
322 // There are probably other cases ...
323 if (const auto *TDT = dyn_cast<TypedefType>(TypePtr)) {
324 Decl = TDT->getDecl();
325 } else if (const auto *TagDeclType = dyn_cast<TagType>(TypePtr)) {
326 Decl = TagDeclType->getDecl();
327 } else if (const auto *TST = dyn_cast<TemplateSpecializationType>(TypePtr)) {
328 Decl = TST->getTemplateName().getAsTemplateDecl();
329 } else {
330 Decl = TypePtr->getAsCXXRecordDecl();
331 }
332
333 if (!Decl) return nullptr;
334
335 return createNestedNameSpecifierForScopeOf(
336 Ctx, Decl, FullyQualified, WithGlobalNsPrefix);
337}
338
339NestedNameSpecifier *createNestedNameSpecifier(const ASTContext &Ctx,
340 const NamespaceDecl *Namespace,
341 bool WithGlobalNsPrefix) {
342 while (Namespace && Namespace->isInline()) {
343 // Ignore inline namespace;
344 Namespace = dyn_cast<NamespaceDecl>(Namespace->getDeclContext());
345 }
346 if (!Namespace) return nullptr;
347
348 bool FullyQualified = true; // doesn't matter, DeclContexts are namespaces
349 return NestedNameSpecifier::Create(
350 Ctx,
351 createOuterNNS(Ctx, Namespace, FullyQualified, WithGlobalNsPrefix),
352 Namespace);
353}
354
355NestedNameSpecifier *createNestedNameSpecifier(const ASTContext &Ctx,
356 const TypeDecl *TD,
357 bool FullyQualify,
358 bool WithGlobalNsPrefix) {
359 const Type *TypePtr = TD->getTypeForDecl();
360 if (isa<const TemplateSpecializationType>(TypePtr) ||
361 isa<const RecordType>(TypePtr)) {
362 // We are asked to fully qualify and we have a Record Type (which
363 // may point to a template specialization) or Template
364 // Specialization Type. We need to fully qualify their arguments.
365
366 TypePtr = getFullyQualifiedTemplateType(Ctx, TypePtr, WithGlobalNsPrefix);
367 }
368
369 return NestedNameSpecifier::Create(
370 Ctx, createOuterNNS(Ctx, TD, FullyQualify, WithGlobalNsPrefix),
371 false /*No TemplateKeyword*/, TypePtr);
372}
373
374/// Return the fully qualified type, including fully-qualified
375/// versions of any template parameters.
376QualType getFullyQualifiedType(QualType QT, const ASTContext &Ctx,
377 bool WithGlobalNsPrefix) {
378 // In case of myType* we need to strip the pointer first, fully
379 // qualify and attach the pointer once again.
380 if (isa<PointerType>(QT.getTypePtr())) {
381 // Get the qualifiers.
382 Qualifiers Quals = QT.getQualifiers();
383 QT = getFullyQualifiedType(QT->getPointeeType(), Ctx, WithGlobalNsPrefix);
384 QT = Ctx.getPointerType(QT);
385 // Add back the qualifiers.
386 QT = Ctx.getQualifiedType(QT, Quals);
387 return QT;
388 }
389
390 if (auto *MPT = dyn_cast<MemberPointerType>(QT.getTypePtr())) {
391 // Get the qualifiers.
392 Qualifiers Quals = QT.getQualifiers();
393 // Fully qualify the pointee and class types.
394 QT = getFullyQualifiedType(QT->getPointeeType(), Ctx, WithGlobalNsPrefix);
395 QualType Class = getFullyQualifiedType(QualType(MPT->getClass(), 0), Ctx,
396 WithGlobalNsPrefix);
397 QT = Ctx.getMemberPointerType(QT, Class.getTypePtr());
398 // Add back the qualifiers.
399 QT = Ctx.getQualifiedType(QT, Quals);
400 return QT;
401 }
402
403 // In case of myType& we need to strip the reference first, fully
404 // qualify and attach the reference once again.
405 if (isa<ReferenceType>(QT.getTypePtr())) {
406 // Get the qualifiers.
407 bool IsLValueRefTy = isa<LValueReferenceType>(QT.getTypePtr());
408 Qualifiers Quals = QT.getQualifiers();
409 QT = getFullyQualifiedType(QT->getPointeeType(), Ctx, WithGlobalNsPrefix);
410 // Add the r- or l-value reference type back to the fully
411 // qualified one.
412 if (IsLValueRefTy)
413 QT = Ctx.getLValueReferenceType(QT);
414 else
415 QT = Ctx.getRValueReferenceType(QT);
416 // Add back the qualifiers.
417 QT = Ctx.getQualifiedType(QT, Quals);
418 return QT;
419 }
420
421 // We don't consider the alias introduced by `using a::X` as a new type.
422 // The qualified name is still a::X.
423 if (isa<UsingType>(QT.getTypePtr())) {
424 return getFullyQualifiedType(QT.getSingleStepDesugaredType(Ctx), Ctx,
425 WithGlobalNsPrefix);
426 }
427
428 // Remove the part of the type related to the type being a template
429 // parameter (we won't report it as part of the 'type name' and it
430 // is actually make the code below to be more complex (to handle
431 // those)
432 while (isa<SubstTemplateTypeParmType>(QT.getTypePtr())) {
433 // Get the qualifiers.
434 Qualifiers Quals = QT.getQualifiers();
435
436 QT = cast<SubstTemplateTypeParmType>(QT.getTypePtr())->desugar();
437
438 // Add back the qualifiers.
439 QT = Ctx.getQualifiedType(QT, Quals);
440 }
441
442 NestedNameSpecifier *Prefix = nullptr;
443 // Local qualifiers are attached to the QualType outside of the
444 // elaborated type. Retrieve them before descending into the
445 // elaborated type.
446 Qualifiers PrefixQualifiers = QT.getLocalQualifiers();
447 QT = QualType(QT.getTypePtr(), 0);
448 ElaboratedTypeKeyword Keyword = ETK_None;
449 if (const auto *ETypeInput = dyn_cast<ElaboratedType>(QT.getTypePtr())) {
450 QT = ETypeInput->getNamedType();
451 assert(!QT.hasLocalQualifiers())(static_cast <bool> (!QT.hasLocalQualifiers()) ? void (
0) : __assert_fail ("!QT.hasLocalQualifiers()", "clang/lib/AST/QualTypeNames.cpp"
, 451, __extension__ __PRETTY_FUNCTION__));
452 Keyword = ETypeInput->getKeyword();
453 }
454 // Create a nested name specifier if needed.
455 Prefix = createNestedNameSpecifierForScopeOf(Ctx, QT.getTypePtr(),
456 true /*FullyQualified*/,
457 WithGlobalNsPrefix);
458
459 // In case of template specializations iterate over the arguments and
460 // fully qualify them as well.
461 if (isa<const TemplateSpecializationType>(QT.getTypePtr()) ||
462 isa<const RecordType>(QT.getTypePtr())) {
463 // We are asked to fully qualify and we have a Record Type (which
464 // may point to a template specialization) or Template
465 // Specialization Type. We need to fully qualify their arguments.
466
467 const Type *TypePtr = getFullyQualifiedTemplateType(
468 Ctx, QT.getTypePtr(), WithGlobalNsPrefix);
469 QT = QualType(TypePtr, 0);
470 }
471 if (Prefix || Keyword != ETK_None) {
472 QT = Ctx.getElaboratedType(Keyword, Prefix, QT);
473 }
474 QT = Ctx.getQualifiedType(QT, PrefixQualifiers);
475 return QT;
476}
477
478std::string getFullyQualifiedName(QualType QT,
479 const ASTContext &Ctx,
480 const PrintingPolicy &Policy,
481 bool WithGlobalNsPrefix) {
482 QualType FQQT = getFullyQualifiedType(QT, Ctx, WithGlobalNsPrefix);
483 return FQQT.getAsString(Policy);
484}
485
486} // end namespace TypeName
487} // end namespace clang