clang  6.0.0svn
USRGeneration.cpp
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1 //===- USRGeneration.cpp - Routines for USR generation --------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
11 #include "clang/AST/ASTContext.h"
12 #include "clang/AST/DeclTemplate.h"
13 #include "clang/AST/DeclVisitor.h"
15 #include "llvm/Support/Path.h"
16 #include "llvm/Support/raw_ostream.h"
17 
18 using namespace clang;
19 using namespace clang::index;
20 
21 //===----------------------------------------------------------------------===//
22 // USR generation.
23 //===----------------------------------------------------------------------===//
24 
25 /// \returns true on error.
26 static bool printLoc(llvm::raw_ostream &OS, SourceLocation Loc,
27  const SourceManager &SM, bool IncludeOffset) {
28  if (Loc.isInvalid()) {
29  return true;
30  }
31  Loc = SM.getExpansionLoc(Loc);
32  const std::pair<FileID, unsigned> &Decomposed = SM.getDecomposedLoc(Loc);
33  const FileEntry *FE = SM.getFileEntryForID(Decomposed.first);
34  if (FE) {
35  OS << llvm::sys::path::filename(FE->getName());
36  } else {
37  // This case really isn't interesting.
38  return true;
39  }
40  if (IncludeOffset) {
41  // Use the offest into the FileID to represent the location. Using
42  // a line/column can cause us to look back at the original source file,
43  // which is expensive.
44  OS << '@' << Decomposed.second;
45  }
46  return false;
47 }
48 
49 static StringRef GetExternalSourceContainer(const NamedDecl *D) {
50  if (!D)
51  return StringRef();
52  if (auto *attr = D->getExternalSourceSymbolAttr()) {
53  return attr->getDefinedIn();
54  }
55  return StringRef();
56 }
57 
58 namespace {
59 class USRGenerator : public ConstDeclVisitor<USRGenerator> {
61  llvm::raw_svector_ostream Out;
62  bool IgnoreResults;
63  ASTContext *Context;
64  bool generatedLoc;
65 
66  llvm::DenseMap<const Type *, unsigned> TypeSubstitutions;
67 
68 public:
69  explicit USRGenerator(ASTContext *Ctx, SmallVectorImpl<char> &Buf)
70  : Buf(Buf),
71  Out(Buf),
72  IgnoreResults(false),
73  Context(Ctx),
74  generatedLoc(false)
75  {
76  // Add the USR space prefix.
77  Out << getUSRSpacePrefix();
78  }
79 
80  bool ignoreResults() const { return IgnoreResults; }
81 
82  // Visitation methods from generating USRs from AST elements.
83  void VisitDeclContext(const DeclContext *D);
84  void VisitFieldDecl(const FieldDecl *D);
85  void VisitFunctionDecl(const FunctionDecl *D);
86  void VisitNamedDecl(const NamedDecl *D);
87  void VisitNamespaceDecl(const NamespaceDecl *D);
88  void VisitNamespaceAliasDecl(const NamespaceAliasDecl *D);
89  void VisitFunctionTemplateDecl(const FunctionTemplateDecl *D);
90  void VisitClassTemplateDecl(const ClassTemplateDecl *D);
91  void VisitObjCContainerDecl(const ObjCContainerDecl *CD,
92  const ObjCCategoryDecl *CatD = nullptr);
93  void VisitObjCMethodDecl(const ObjCMethodDecl *MD);
94  void VisitObjCPropertyDecl(const ObjCPropertyDecl *D);
95  void VisitObjCPropertyImplDecl(const ObjCPropertyImplDecl *D);
96  void VisitTagDecl(const TagDecl *D);
97  void VisitTypedefDecl(const TypedefDecl *D);
98  void VisitTemplateTypeParmDecl(const TemplateTypeParmDecl *D);
99  void VisitVarDecl(const VarDecl *D);
100  void VisitNonTypeTemplateParmDecl(const NonTypeTemplateParmDecl *D);
101  void VisitTemplateTemplateParmDecl(const TemplateTemplateParmDecl *D);
102  void VisitUnresolvedUsingValueDecl(const UnresolvedUsingValueDecl *D);
103  void VisitUnresolvedUsingTypenameDecl(const UnresolvedUsingTypenameDecl *D);
104 
105  void VisitLinkageSpecDecl(const LinkageSpecDecl *D) {
106  IgnoreResults = true;
107  }
108 
109  void VisitUsingDirectiveDecl(const UsingDirectiveDecl *D) {
110  IgnoreResults = true;
111  }
112 
113  void VisitUsingDecl(const UsingDecl *D) {
114  IgnoreResults = true;
115  }
116 
117  bool ShouldGenerateLocation(const NamedDecl *D);
118 
119  bool isLocal(const NamedDecl *D) {
120  return D->getParentFunctionOrMethod() != nullptr;
121  }
122 
123  void GenExtSymbolContainer(const NamedDecl *D);
124 
125  /// Generate the string component containing the location of the
126  /// declaration.
127  bool GenLoc(const Decl *D, bool IncludeOffset);
128 
129  /// String generation methods used both by the visitation methods
130  /// and from other clients that want to directly generate USRs. These
131  /// methods do not construct complete USRs (which incorporate the parents
132  /// of an AST element), but only the fragments concerning the AST element
133  /// itself.
134 
135  /// Generate a USR for an Objective-C class.
136  void GenObjCClass(StringRef cls, StringRef ExtSymDefinedIn,
137  StringRef CategoryContextExtSymbolDefinedIn) {
138  generateUSRForObjCClass(cls, Out, ExtSymDefinedIn,
139  CategoryContextExtSymbolDefinedIn);
140  }
141 
142  /// Generate a USR for an Objective-C class category.
143  void GenObjCCategory(StringRef cls, StringRef cat,
144  StringRef clsExt, StringRef catExt) {
145  generateUSRForObjCCategory(cls, cat, Out, clsExt, catExt);
146  }
147 
148  /// Generate a USR fragment for an Objective-C property.
149  void GenObjCProperty(StringRef prop, bool isClassProp) {
150  generateUSRForObjCProperty(prop, isClassProp, Out);
151  }
152 
153  /// Generate a USR for an Objective-C protocol.
154  void GenObjCProtocol(StringRef prot, StringRef ext) {
155  generateUSRForObjCProtocol(prot, Out, ext);
156  }
157 
158  void VisitType(QualType T);
159  void VisitTemplateParameterList(const TemplateParameterList *Params);
160  void VisitTemplateName(TemplateName Name);
161  void VisitTemplateArgument(const TemplateArgument &Arg);
162 
163  /// Emit a Decl's name using NamedDecl::printName() and return true if
164  /// the decl had no name.
165  bool EmitDeclName(const NamedDecl *D);
166 };
167 } // end anonymous namespace
168 
169 //===----------------------------------------------------------------------===//
170 // Generating USRs from ASTS.
171 //===----------------------------------------------------------------------===//
172 
173 bool USRGenerator::EmitDeclName(const NamedDecl *D) {
174  const unsigned startSize = Buf.size();
175  D->printName(Out);
176  const unsigned endSize = Buf.size();
177  return startSize == endSize;
178 }
179 
180 bool USRGenerator::ShouldGenerateLocation(const NamedDecl *D) {
181  if (D->isExternallyVisible())
182  return false;
183  if (D->getParentFunctionOrMethod())
184  return true;
185  SourceLocation Loc = D->getLocation();
186  if (Loc.isInvalid())
187  return false;
188  const SourceManager &SM = Context->getSourceManager();
189  return !SM.isInSystemHeader(Loc);
190 }
191 
192 void USRGenerator::VisitDeclContext(const DeclContext *DC) {
193  if (const NamedDecl *D = dyn_cast<NamedDecl>(DC))
194  Visit(D);
195 }
196 
197 void USRGenerator::VisitFieldDecl(const FieldDecl *D) {
198  // The USR for an ivar declared in a class extension is based on the
199  // ObjCInterfaceDecl, not the ObjCCategoryDecl.
200  if (const ObjCInterfaceDecl *ID = Context->getObjContainingInterface(D))
201  Visit(ID);
202  else
203  VisitDeclContext(D->getDeclContext());
204  Out << (isa<ObjCIvarDecl>(D) ? "@" : "@FI@");
205  if (EmitDeclName(D)) {
206  // Bit fields can be anonymous.
207  IgnoreResults = true;
208  return;
209  }
210 }
211 
212 void USRGenerator::VisitFunctionDecl(const FunctionDecl *D) {
213  if (ShouldGenerateLocation(D) && GenLoc(D, /*IncludeOffset=*/isLocal(D)))
214  return;
215 
216  const unsigned StartSize = Buf.size();
217  VisitDeclContext(D->getDeclContext());
218  if (Buf.size() == StartSize)
219  GenExtSymbolContainer(D);
220 
221  bool IsTemplate = false;
223  IsTemplate = true;
224  Out << "@FT@";
225  VisitTemplateParameterList(FunTmpl->getTemplateParameters());
226  } else
227  Out << "@F@";
228 
229  PrintingPolicy Policy(Context->getLangOpts());
230  // Forward references can have different template argument names. Suppress the
231  // template argument names in constructors to make their USR more stable.
233  D->getDeclName().print(Out, Policy);
234 
235  ASTContext &Ctx = *Context;
236  if ((!Ctx.getLangOpts().CPlusPlus || D->isExternC()) &&
237  !D->hasAttr<OverloadableAttr>())
238  return;
239 
240  if (const TemplateArgumentList *
241  SpecArgs = D->getTemplateSpecializationArgs()) {
242  Out << '<';
243  for (unsigned I = 0, N = SpecArgs->size(); I != N; ++I) {
244  Out << '#';
245  VisitTemplateArgument(SpecArgs->get(I));
246  }
247  Out << '>';
248  }
249 
250  // Mangle in type information for the arguments.
251  for (auto PD : D->parameters()) {
252  Out << '#';
253  VisitType(PD->getType());
254  }
255  if (D->isVariadic())
256  Out << '.';
257  if (IsTemplate) {
258  // Function templates can be overloaded by return type, for example:
259  // \code
260  // template <class T> typename T::A foo() {}
261  // template <class T> typename T::B foo() {}
262  // \endcode
263  Out << '#';
264  VisitType(D->getReturnType());
265  }
266  Out << '#';
267  if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D)) {
268  if (MD->isStatic())
269  Out << 'S';
270  if (unsigned quals = MD->getTypeQualifiers())
271  Out << (char)('0' + quals);
272  switch (MD->getRefQualifier()) {
273  case RQ_None: break;
274  case RQ_LValue: Out << '&'; break;
275  case RQ_RValue: Out << "&&"; break;
276  }
277  }
278 }
279 
280 void USRGenerator::VisitNamedDecl(const NamedDecl *D) {
281  VisitDeclContext(D->getDeclContext());
282  Out << "@";
283 
284  if (EmitDeclName(D)) {
285  // The string can be empty if the declaration has no name; e.g., it is
286  // the ParmDecl with no name for declaration of a function pointer type,
287  // e.g.: void (*f)(void *);
288  // In this case, don't generate a USR.
289  IgnoreResults = true;
290  }
291 }
292 
293 void USRGenerator::VisitVarDecl(const VarDecl *D) {
294  // VarDecls can be declared 'extern' within a function or method body,
295  // but their enclosing DeclContext is the function, not the TU. We need
296  // to check the storage class to correctly generate the USR.
297  if (ShouldGenerateLocation(D) && GenLoc(D, /*IncludeOffset=*/isLocal(D)))
298  return;
299 
300  VisitDeclContext(D->getDeclContext());
301 
302  if (VarTemplateDecl *VarTmpl = D->getDescribedVarTemplate()) {
303  Out << "@VT";
304  VisitTemplateParameterList(VarTmpl->getTemplateParameters());
305  } else if (const VarTemplatePartialSpecializationDecl *PartialSpec
306  = dyn_cast<VarTemplatePartialSpecializationDecl>(D)) {
307  Out << "@VP";
308  VisitTemplateParameterList(PartialSpec->getTemplateParameters());
309  }
310 
311  // Variables always have simple names.
312  StringRef s = D->getName();
313 
314  // The string can be empty if the declaration has no name; e.g., it is
315  // the ParmDecl with no name for declaration of a function pointer type, e.g.:
316  // void (*f)(void *);
317  // In this case, don't generate a USR.
318  if (s.empty())
319  IgnoreResults = true;
320  else
321  Out << '@' << s;
322 
323  // For a template specialization, mangle the template arguments.
324  if (const VarTemplateSpecializationDecl *Spec
325  = dyn_cast<VarTemplateSpecializationDecl>(D)) {
326  const TemplateArgumentList &Args = Spec->getTemplateArgs();
327  Out << '>';
328  for (unsigned I = 0, N = Args.size(); I != N; ++I) {
329  Out << '#';
330  VisitTemplateArgument(Args.get(I));
331  }
332  }
333 }
334 
335 void USRGenerator::VisitNonTypeTemplateParmDecl(
336  const NonTypeTemplateParmDecl *D) {
337  GenLoc(D, /*IncludeOffset=*/true);
338 }
339 
340 void USRGenerator::VisitTemplateTemplateParmDecl(
341  const TemplateTemplateParmDecl *D) {
342  GenLoc(D, /*IncludeOffset=*/true);
343 }
344 
345 void USRGenerator::VisitNamespaceDecl(const NamespaceDecl *D) {
346  if (D->isAnonymousNamespace()) {
347  Out << "@aN";
348  return;
349  }
350 
351  VisitDeclContext(D->getDeclContext());
352  if (!IgnoreResults)
353  Out << "@N@" << D->getName();
354 }
355 
356 void USRGenerator::VisitFunctionTemplateDecl(const FunctionTemplateDecl *D) {
357  VisitFunctionDecl(D->getTemplatedDecl());
358 }
359 
360 void USRGenerator::VisitClassTemplateDecl(const ClassTemplateDecl *D) {
361  VisitTagDecl(D->getTemplatedDecl());
362 }
363 
364 void USRGenerator::VisitNamespaceAliasDecl(const NamespaceAliasDecl *D) {
365  VisitDeclContext(D->getDeclContext());
366  if (!IgnoreResults)
367  Out << "@NA@" << D->getName();
368 }
369 
370 void USRGenerator::VisitObjCMethodDecl(const ObjCMethodDecl *D) {
371  const DeclContext *container = D->getDeclContext();
372  if (const ObjCProtocolDecl *pd = dyn_cast<ObjCProtocolDecl>(container)) {
373  Visit(pd);
374  }
375  else {
376  // The USR for a method declared in a class extension or category is based on
377  // the ObjCInterfaceDecl, not the ObjCCategoryDecl.
378  const ObjCInterfaceDecl *ID = D->getClassInterface();
379  if (!ID) {
380  IgnoreResults = true;
381  return;
382  }
383  auto getCategoryContext = [](const ObjCMethodDecl *D) ->
384  const ObjCCategoryDecl * {
385  if (auto *CD = dyn_cast<ObjCCategoryDecl>(D->getDeclContext()))
386  return CD;
387  if (auto *ICD = dyn_cast<ObjCCategoryImplDecl>(D->getDeclContext()))
388  return ICD->getCategoryDecl();
389  return nullptr;
390  };
391  auto *CD = getCategoryContext(D);
392  VisitObjCContainerDecl(ID, CD);
393  }
394  // Ideally we would use 'GenObjCMethod', but this is such a hot path
395  // for Objective-C code that we don't want to use
396  // DeclarationName::getAsString().
397  Out << (D->isInstanceMethod() ? "(im)" : "(cm)")
398  << DeclarationName(D->getSelector());
399 }
400 
401 void USRGenerator::VisitObjCContainerDecl(const ObjCContainerDecl *D,
402  const ObjCCategoryDecl *CatD) {
403  switch (D->getKind()) {
404  default:
405  llvm_unreachable("Invalid ObjC container.");
406  case Decl::ObjCInterface:
407  case Decl::ObjCImplementation:
408  GenObjCClass(D->getName(), GetExternalSourceContainer(D),
410  break;
411  case Decl::ObjCCategory: {
412  const ObjCCategoryDecl *CD = cast<ObjCCategoryDecl>(D);
413  const ObjCInterfaceDecl *ID = CD->getClassInterface();
414  if (!ID) {
415  // Handle invalid code where the @interface might not
416  // have been specified.
417  // FIXME: We should be able to generate this USR even if the
418  // @interface isn't available.
419  IgnoreResults = true;
420  return;
421  }
422  // Specially handle class extensions, which are anonymous categories.
423  // We want to mangle in the location to uniquely distinguish them.
424  if (CD->IsClassExtension()) {
425  Out << "objc(ext)" << ID->getName() << '@';
426  GenLoc(CD, /*IncludeOffset=*/true);
427  }
428  else
429  GenObjCCategory(ID->getName(), CD->getName(),
432 
433  break;
434  }
435  case Decl::ObjCCategoryImpl: {
436  const ObjCCategoryImplDecl *CD = cast<ObjCCategoryImplDecl>(D);
437  const ObjCInterfaceDecl *ID = CD->getClassInterface();
438  if (!ID) {
439  // Handle invalid code where the @interface might not
440  // have been specified.
441  // FIXME: We should be able to generate this USR even if the
442  // @interface isn't available.
443  IgnoreResults = true;
444  return;
445  }
446  GenObjCCategory(ID->getName(), CD->getName(),
449  break;
450  }
451  case Decl::ObjCProtocol: {
452  const ObjCProtocolDecl *PD = cast<ObjCProtocolDecl>(D);
453  GenObjCProtocol(PD->getName(), GetExternalSourceContainer(PD));
454  break;
455  }
456  }
457 }
458 
459 void USRGenerator::VisitObjCPropertyDecl(const ObjCPropertyDecl *D) {
460  // The USR for a property declared in a class extension or category is based
461  // on the ObjCInterfaceDecl, not the ObjCCategoryDecl.
462  if (const ObjCInterfaceDecl *ID = Context->getObjContainingInterface(D))
463  Visit(ID);
464  else
465  Visit(cast<Decl>(D->getDeclContext()));
466  GenObjCProperty(D->getName(), D->isClassProperty());
467 }
468 
469 void USRGenerator::VisitObjCPropertyImplDecl(const ObjCPropertyImplDecl *D) {
470  if (ObjCPropertyDecl *PD = D->getPropertyDecl()) {
471  VisitObjCPropertyDecl(PD);
472  return;
473  }
474 
475  IgnoreResults = true;
476 }
477 
478 void USRGenerator::VisitTagDecl(const TagDecl *D) {
479  // Add the location of the tag decl to handle resolution across
480  // translation units.
481  if (!isa<EnumDecl>(D) &&
482  ShouldGenerateLocation(D) && GenLoc(D, /*IncludeOffset=*/isLocal(D)))
483  return;
484 
485  GenExtSymbolContainer(D);
486 
487  D = D->getCanonicalDecl();
488  VisitDeclContext(D->getDeclContext());
489 
490  bool AlreadyStarted = false;
491  if (const CXXRecordDecl *CXXRecord = dyn_cast<CXXRecordDecl>(D)) {
492  if (ClassTemplateDecl *ClassTmpl = CXXRecord->getDescribedClassTemplate()) {
493  AlreadyStarted = true;
494 
495  switch (D->getTagKind()) {
496  case TTK_Interface:
497  case TTK_Class:
498  case TTK_Struct: Out << "@ST"; break;
499  case TTK_Union: Out << "@UT"; break;
500  case TTK_Enum: llvm_unreachable("enum template");
501  }
502  VisitTemplateParameterList(ClassTmpl->getTemplateParameters());
503  } else if (const ClassTemplatePartialSpecializationDecl *PartialSpec
504  = dyn_cast<ClassTemplatePartialSpecializationDecl>(CXXRecord)) {
505  AlreadyStarted = true;
506 
507  switch (D->getTagKind()) {
508  case TTK_Interface:
509  case TTK_Class:
510  case TTK_Struct: Out << "@SP"; break;
511  case TTK_Union: Out << "@UP"; break;
512  case TTK_Enum: llvm_unreachable("enum partial specialization");
513  }
514  VisitTemplateParameterList(PartialSpec->getTemplateParameters());
515  }
516  }
517 
518  if (!AlreadyStarted) {
519  switch (D->getTagKind()) {
520  case TTK_Interface:
521  case TTK_Class:
522  case TTK_Struct: Out << "@S"; break;
523  case TTK_Union: Out << "@U"; break;
524  case TTK_Enum: Out << "@E"; break;
525  }
526  }
527 
528  Out << '@';
529  assert(Buf.size() > 0);
530  const unsigned off = Buf.size() - 1;
531 
532  if (EmitDeclName(D)) {
533  if (const TypedefNameDecl *TD = D->getTypedefNameForAnonDecl()) {
534  Buf[off] = 'A';
535  Out << '@' << *TD;
536  }
537  else {
538  if (D->isEmbeddedInDeclarator() && !D->isFreeStanding()) {
539  printLoc(Out, D->getLocation(), Context->getSourceManager(), true);
540  } else {
541  Buf[off] = 'a';
542  if (auto *ED = dyn_cast<EnumDecl>(D)) {
543  // Distinguish USRs of anonymous enums by using their first enumerator.
544  auto enum_range = ED->enumerators();
545  if (enum_range.begin() != enum_range.end()) {
546  Out << '@' << **enum_range.begin();
547  }
548  }
549  }
550  }
551  }
552 
553  // For a class template specialization, mangle the template arguments.
554  if (const ClassTemplateSpecializationDecl *Spec
555  = dyn_cast<ClassTemplateSpecializationDecl>(D)) {
556  const TemplateArgumentList &Args = Spec->getTemplateArgs();
557  Out << '>';
558  for (unsigned I = 0, N = Args.size(); I != N; ++I) {
559  Out << '#';
560  VisitTemplateArgument(Args.get(I));
561  }
562  }
563 }
564 
565 void USRGenerator::VisitTypedefDecl(const TypedefDecl *D) {
566  if (ShouldGenerateLocation(D) && GenLoc(D, /*IncludeOffset=*/isLocal(D)))
567  return;
568  const DeclContext *DC = D->getDeclContext();
569  if (const NamedDecl *DCN = dyn_cast<NamedDecl>(DC))
570  Visit(DCN);
571  Out << "@T@";
572  Out << D->getName();
573 }
574 
575 void USRGenerator::VisitTemplateTypeParmDecl(const TemplateTypeParmDecl *D) {
576  GenLoc(D, /*IncludeOffset=*/true);
577 }
578 
579 void USRGenerator::GenExtSymbolContainer(const NamedDecl *D) {
580  StringRef Container = GetExternalSourceContainer(D);
581  if (!Container.empty())
582  Out << "@M@" << Container;
583 }
584 
585 bool USRGenerator::GenLoc(const Decl *D, bool IncludeOffset) {
586  if (generatedLoc)
587  return IgnoreResults;
588  generatedLoc = true;
589 
590  // Guard against null declarations in invalid code.
591  if (!D) {
592  IgnoreResults = true;
593  return true;
594  }
595 
596  // Use the location of canonical decl.
597  D = D->getCanonicalDecl();
598 
599  IgnoreResults =
600  IgnoreResults || printLoc(Out, D->getLocStart(),
601  Context->getSourceManager(), IncludeOffset);
602 
603  return IgnoreResults;
604 }
605 
606 static void printQualifier(llvm::raw_ostream &Out, ASTContext &Ctx, NestedNameSpecifier *NNS) {
607  // FIXME: Encode the qualifier, don't just print it.
608  PrintingPolicy PO(Ctx.getLangOpts());
609  PO.SuppressTagKeyword = true;
610  PO.SuppressUnwrittenScope = true;
611  PO.ConstantArraySizeAsWritten = false;
612  PO.AnonymousTagLocations = false;
613  NNS->print(Out, PO);
614 }
615 
616 void USRGenerator::VisitType(QualType T) {
617  // This method mangles in USR information for types. It can possibly
618  // just reuse the naming-mangling logic used by codegen, although the
619  // requirements for USRs might not be the same.
620  ASTContext &Ctx = *Context;
621 
622  do {
623  T = Ctx.getCanonicalType(T);
624  Qualifiers Q = T.getQualifiers();
625  unsigned qVal = 0;
626  if (Q.hasConst())
627  qVal |= 0x1;
628  if (Q.hasVolatile())
629  qVal |= 0x2;
630  if (Q.hasRestrict())
631  qVal |= 0x4;
632  if(qVal)
633  Out << ((char) ('0' + qVal));
634 
635  // Mangle in ObjC GC qualifiers?
636 
637  if (const PackExpansionType *Expansion = T->getAs<PackExpansionType>()) {
638  Out << 'P';
639  T = Expansion->getPattern();
640  }
641 
642  if (const BuiltinType *BT = T->getAs<BuiltinType>()) {
643  unsigned char c = '\0';
644  switch (BT->getKind()) {
645  case BuiltinType::Void:
646  c = 'v'; break;
647  case BuiltinType::Bool:
648  c = 'b'; break;
649  case BuiltinType::UChar:
650  c = 'c'; break;
651  case BuiltinType::Char16:
652  c = 'q'; break;
653  case BuiltinType::Char32:
654  c = 'w'; break;
655  case BuiltinType::UShort:
656  c = 's'; break;
657  case BuiltinType::UInt:
658  c = 'i'; break;
659  case BuiltinType::ULong:
660  c = 'l'; break;
661  case BuiltinType::ULongLong:
662  c = 'k'; break;
663  case BuiltinType::UInt128:
664  c = 'j'; break;
665  case BuiltinType::Char_U:
666  case BuiltinType::Char_S:
667  c = 'C'; break;
668  case BuiltinType::SChar:
669  c = 'r'; break;
670  case BuiltinType::WChar_S:
671  case BuiltinType::WChar_U:
672  c = 'W'; break;
673  case BuiltinType::Short:
674  c = 'S'; break;
675  case BuiltinType::Int:
676  c = 'I'; break;
677  case BuiltinType::Long:
678  c = 'L'; break;
679  case BuiltinType::LongLong:
680  c = 'K'; break;
681  case BuiltinType::Int128:
682  c = 'J'; break;
683  case BuiltinType::Float16:
684  case BuiltinType::Half:
685  c = 'h'; break;
686  case BuiltinType::Float:
687  c = 'f'; break;
688  case BuiltinType::Double:
689  c = 'd'; break;
690  case BuiltinType::LongDouble:
691  c = 'D'; break;
692  case BuiltinType::Float128:
693  c = 'Q'; break;
694  case BuiltinType::NullPtr:
695  c = 'n'; break;
696 #define BUILTIN_TYPE(Id, SingletonId)
697 #define PLACEHOLDER_TYPE(Id, SingletonId) case BuiltinType::Id:
698 #include "clang/AST/BuiltinTypes.def"
699  case BuiltinType::Dependent:
700 #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
701  case BuiltinType::Id:
702 #include "clang/Basic/OpenCLImageTypes.def"
703  case BuiltinType::OCLEvent:
704  case BuiltinType::OCLClkEvent:
705  case BuiltinType::OCLQueue:
706  case BuiltinType::OCLReserveID:
707  case BuiltinType::OCLSampler:
708  IgnoreResults = true;
709  return;
710  case BuiltinType::ObjCId:
711  c = 'o'; break;
712  case BuiltinType::ObjCClass:
713  c = 'O'; break;
714  case BuiltinType::ObjCSel:
715  c = 'e'; break;
716  }
717  Out << c;
718  return;
719  }
720 
721  // If we have already seen this (non-built-in) type, use a substitution
722  // encoding.
723  llvm::DenseMap<const Type *, unsigned>::iterator Substitution
724  = TypeSubstitutions.find(T.getTypePtr());
725  if (Substitution != TypeSubstitutions.end()) {
726  Out << 'S' << Substitution->second << '_';
727  return;
728  } else {
729  // Record this as a substitution.
730  unsigned Number = TypeSubstitutions.size();
731  TypeSubstitutions[T.getTypePtr()] = Number;
732  }
733 
734  if (const PointerType *PT = T->getAs<PointerType>()) {
735  Out << '*';
736  T = PT->getPointeeType();
737  continue;
738  }
739  if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) {
740  Out << '*';
741  T = OPT->getPointeeType();
742  continue;
743  }
744  if (const RValueReferenceType *RT = T->getAs<RValueReferenceType>()) {
745  Out << "&&";
746  T = RT->getPointeeType();
747  continue;
748  }
749  if (const ReferenceType *RT = T->getAs<ReferenceType>()) {
750  Out << '&';
751  T = RT->getPointeeType();
752  continue;
753  }
754  if (const FunctionProtoType *FT = T->getAs<FunctionProtoType>()) {
755  Out << 'F';
756  VisitType(FT->getReturnType());
757  Out << '(';
758  for (const auto &I : FT->param_types()) {
759  Out << '#';
760  VisitType(I);
761  }
762  Out << ')';
763  if (FT->isVariadic())
764  Out << '.';
765  return;
766  }
767  if (const BlockPointerType *BT = T->getAs<BlockPointerType>()) {
768  Out << 'B';
769  T = BT->getPointeeType();
770  continue;
771  }
772  if (const ComplexType *CT = T->getAs<ComplexType>()) {
773  Out << '<';
774  T = CT->getElementType();
775  continue;
776  }
777  if (const TagType *TT = T->getAs<TagType>()) {
778  Out << '$';
779  VisitTagDecl(TT->getDecl());
780  return;
781  }
782  if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) {
783  Out << '$';
784  VisitObjCInterfaceDecl(OIT->getDecl());
785  return;
786  }
787  if (const ObjCObjectType *OIT = T->getAs<ObjCObjectType>()) {
788  Out << 'Q';
789  VisitType(OIT->getBaseType());
790  for (auto *Prot : OIT->getProtocols())
791  VisitObjCProtocolDecl(Prot);
792  return;
793  }
794  if (const TemplateTypeParmType *TTP = T->getAs<TemplateTypeParmType>()) {
795  Out << 't' << TTP->getDepth() << '.' << TTP->getIndex();
796  return;
797  }
798  if (const TemplateSpecializationType *Spec
800  Out << '>';
801  VisitTemplateName(Spec->getTemplateName());
802  Out << Spec->getNumArgs();
803  for (unsigned I = 0, N = Spec->getNumArgs(); I != N; ++I)
804  VisitTemplateArgument(Spec->getArg(I));
805  return;
806  }
807  if (const DependentNameType *DNT = T->getAs<DependentNameType>()) {
808  Out << '^';
809  printQualifier(Out, Ctx, DNT->getQualifier());
810  Out << ':' << DNT->getIdentifier()->getName();
811  return;
812  }
813  if (const InjectedClassNameType *InjT = T->getAs<InjectedClassNameType>()) {
814  T = InjT->getInjectedSpecializationType();
815  continue;
816  }
817  if (const auto *VT = T->getAs<VectorType>()) {
818  Out << (T->isExtVectorType() ? ']' : '[');
819  Out << VT->getNumElements();
820  T = VT->getElementType();
821  continue;
822  }
823  if (const auto *const AT = dyn_cast<ArrayType>(T)) {
824  Out << '{';
825  switch (AT->getSizeModifier()) {
826  case ArrayType::Static:
827  Out << 's';
828  break;
829  case ArrayType::Star:
830  Out << '*';
831  break;
832  case ArrayType::Normal:
833  Out << 'n';
834  break;
835  }
836  if (const auto *const CAT = dyn_cast<ConstantArrayType>(T))
837  Out << CAT->getSize();
838 
839  T = AT->getElementType();
840  continue;
841  }
842 
843  // Unhandled type.
844  Out << ' ';
845  break;
846  } while (true);
847 }
848 
849 void USRGenerator::VisitTemplateParameterList(
850  const TemplateParameterList *Params) {
851  if (!Params)
852  return;
853  Out << '>' << Params->size();
854  for (TemplateParameterList::const_iterator P = Params->begin(),
855  PEnd = Params->end();
856  P != PEnd; ++P) {
857  Out << '#';
858  if (isa<TemplateTypeParmDecl>(*P)) {
859  if (cast<TemplateTypeParmDecl>(*P)->isParameterPack())
860  Out<< 'p';
861  Out << 'T';
862  continue;
863  }
864 
865  if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(*P)) {
866  if (NTTP->isParameterPack())
867  Out << 'p';
868  Out << 'N';
869  VisitType(NTTP->getType());
870  continue;
871  }
872 
873  TemplateTemplateParmDecl *TTP = cast<TemplateTemplateParmDecl>(*P);
874  if (TTP->isParameterPack())
875  Out << 'p';
876  Out << 't';
877  VisitTemplateParameterList(TTP->getTemplateParameters());
878  }
879 }
880 
881 void USRGenerator::VisitTemplateName(TemplateName Name) {
882  if (TemplateDecl *Template = Name.getAsTemplateDecl()) {
883  if (TemplateTemplateParmDecl *TTP
884  = dyn_cast<TemplateTemplateParmDecl>(Template)) {
885  Out << 't' << TTP->getDepth() << '.' << TTP->getIndex();
886  return;
887  }
888 
889  Visit(Template);
890  return;
891  }
892 
893  // FIXME: Visit dependent template names.
894 }
895 
896 void USRGenerator::VisitTemplateArgument(const TemplateArgument &Arg) {
897  switch (Arg.getKind()) {
898  case TemplateArgument::Null:
899  break;
900 
901  case TemplateArgument::Declaration:
902  Visit(Arg.getAsDecl());
903  break;
904 
905  case TemplateArgument::NullPtr:
906  break;
907 
908  case TemplateArgument::TemplateExpansion:
909  Out << 'P'; // pack expansion of...
910  // Fall through
911  case TemplateArgument::Template:
912  VisitTemplateName(Arg.getAsTemplateOrTemplatePattern());
913  break;
914 
915  case TemplateArgument::Expression:
916  // FIXME: Visit expressions.
917  break;
918 
919  case TemplateArgument::Pack:
920  Out << 'p' << Arg.pack_size();
921  for (const auto &P : Arg.pack_elements())
922  VisitTemplateArgument(P);
923  break;
924 
925  case TemplateArgument::Type:
926  VisitType(Arg.getAsType());
927  break;
928 
929  case TemplateArgument::Integral:
930  Out << 'V';
931  VisitType(Arg.getIntegralType());
932  Out << Arg.getAsIntegral();
933  break;
934  }
935 }
936 
937 void USRGenerator::VisitUnresolvedUsingValueDecl(const UnresolvedUsingValueDecl *D) {
938  if (ShouldGenerateLocation(D) && GenLoc(D, /*IncludeOffset=*/isLocal(D)))
939  return;
940  VisitDeclContext(D->getDeclContext());
941  Out << "@UUV@";
942  printQualifier(Out, D->getASTContext(), D->getQualifier());
943  EmitDeclName(D);
944 }
945 
946 void USRGenerator::VisitUnresolvedUsingTypenameDecl(const UnresolvedUsingTypenameDecl *D) {
947  if (ShouldGenerateLocation(D) && GenLoc(D, /*IncludeOffset=*/isLocal(D)))
948  return;
949  VisitDeclContext(D->getDeclContext());
950  Out << "@UUT@";
951  printQualifier(Out, D->getASTContext(), D->getQualifier());
952  Out << D->getName(); // Simple name.
953 }
954 
955 
956 
957 //===----------------------------------------------------------------------===//
958 // USR generation functions.
959 //===----------------------------------------------------------------------===//
960 
961 static void combineClassAndCategoryExtContainers(StringRef ClsSymDefinedIn,
962  StringRef CatSymDefinedIn,
963  raw_ostream &OS) {
964  if (ClsSymDefinedIn.empty() && CatSymDefinedIn.empty())
965  return;
966  if (CatSymDefinedIn.empty()) {
967  OS << "@M@" << ClsSymDefinedIn << '@';
968  return;
969  }
970  OS << "@CM@" << CatSymDefinedIn << '@';
971  if (ClsSymDefinedIn != CatSymDefinedIn) {
972  OS << ClsSymDefinedIn << '@';
973  }
974 }
975 
976 void clang::index::generateUSRForObjCClass(StringRef Cls, raw_ostream &OS,
977  StringRef ExtSymDefinedIn,
978  StringRef CategoryContextExtSymbolDefinedIn) {
979  combineClassAndCategoryExtContainers(ExtSymDefinedIn,
980  CategoryContextExtSymbolDefinedIn, OS);
981  OS << "objc(cs)" << Cls;
982 }
983 
984 void clang::index::generateUSRForObjCCategory(StringRef Cls, StringRef Cat,
985  raw_ostream &OS,
986  StringRef ClsSymDefinedIn,
987  StringRef CatSymDefinedIn) {
988  combineClassAndCategoryExtContainers(ClsSymDefinedIn, CatSymDefinedIn, OS);
989  OS << "objc(cy)" << Cls << '@' << Cat;
990 }
991 
992 void clang::index::generateUSRForObjCIvar(StringRef Ivar, raw_ostream &OS) {
993  OS << '@' << Ivar;
994 }
995 
996 void clang::index::generateUSRForObjCMethod(StringRef Sel,
997  bool IsInstanceMethod,
998  raw_ostream &OS) {
999  OS << (IsInstanceMethod ? "(im)" : "(cm)") << Sel;
1000 }
1001 
1002 void clang::index::generateUSRForObjCProperty(StringRef Prop, bool isClassProp,
1003  raw_ostream &OS) {
1004  OS << (isClassProp ? "(cpy)" : "(py)") << Prop;
1005 }
1006 
1007 void clang::index::generateUSRForObjCProtocol(StringRef Prot, raw_ostream &OS,
1008  StringRef ExtSymDefinedIn) {
1009  if (!ExtSymDefinedIn.empty())
1010  OS << "@M@" << ExtSymDefinedIn << '@';
1011  OS << "objc(pl)" << Prot;
1012 }
1013 
1014 void clang::index::generateUSRForGlobalEnum(StringRef EnumName, raw_ostream &OS,
1015  StringRef ExtSymDefinedIn) {
1016  if (!ExtSymDefinedIn.empty())
1017  OS << "@M@" << ExtSymDefinedIn;
1018  OS << "@E@" << EnumName;
1019 }
1020 
1021 void clang::index::generateUSRForEnumConstant(StringRef EnumConstantName,
1022  raw_ostream &OS) {
1023  OS << '@' << EnumConstantName;
1024 }
1025 
1026 bool clang::index::generateUSRForDecl(const Decl *D,
1027  SmallVectorImpl<char> &Buf) {
1028  if (!D)
1029  return true;
1030  // We don't ignore decls with invalid source locations. Implicit decls, like
1031  // C++'s operator new function, can have invalid locations but it is fine to
1032  // create USRs that can identify them.
1033 
1034  USRGenerator UG(&D->getASTContext(), Buf);
1035  UG.Visit(D);
1036  return UG.ignoreResults();
1037 }
1038 
1040  const SourceManager &SM,
1041  SmallVectorImpl<char> &Buf) {
1042  if (!MD)
1043  return true;
1044  return generateUSRForMacro(MD->getName()->getName(), MD->getLocation(),
1045  SM, Buf);
1046 
1047 }
1048 
1050  const SourceManager &SM,
1051  SmallVectorImpl<char> &Buf) {
1052  // Don't generate USRs for things with invalid locations.
1053  if (MacroName.empty() || Loc.isInvalid())
1054  return true;
1055 
1056  llvm::raw_svector_ostream Out(Buf);
1057 
1058  // Assume that system headers are sane. Don't put source location
1059  // information into the USR if the macro comes from a system header.
1060  bool ShouldGenerateLocation = !SM.isInSystemHeader(Loc);
1061 
1062  Out << getUSRSpacePrefix();
1063  if (ShouldGenerateLocation)
1064  printLoc(Out, Loc, SM, /*IncludeOffset=*/true);
1065  Out << "@macro@";
1066  Out << MacroName;
1067  return false;
1068 }
VarTemplateDecl * getDescribedVarTemplate() const
Retrieves the variable template that is described by this variable declaration.
Definition: Decl.cpp:2393
Defines the clang::ASTContext interface.
An instance of this class is created to represent a function declaration or definition.
Definition: Decl.h:1697
bool generateUSRForMacro(const MacroDefinitionRecord *MD, const SourceManager &SM, SmallVectorImpl< char > &Buf)
Generate a USR for a macro, including the USR prefix.
PointerType - C99 6.7.5.1 - Pointer Declarators.
Definition: Type.h:2285
A (possibly-)qualified type.
Definition: Type.h:653
ObjCInterfaceDecl * getClassInterface()
Definition: DeclObjC.h:2344
void generateUSRForObjCCategory(StringRef Cls, StringRef Cat, raw_ostream &OS, StringRef ClsExtSymbolDefinedIn="", StringRef CatExtSymbolDefinedIn="")
Generate a USR fragment for an Objective-C class category.
bool isExternC() const
Determines whether this function is a function with external, C linkage.
Definition: Decl.cpp:2783
QualType getPointeeType() const
If this is a pointer, ObjC object pointer, or block pointer, this returns the respective pointee...
Definition: Type.cpp:456
TypedefDecl - Represents the declaration of a typedef-name via the &#39;typedef&#39; type specifier...
Definition: Decl.h:2888
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:86
Defines the C++ template declaration subclasses.
Declaration of a variable template.
NamespaceDecl - Represent a C++ namespace.
Definition: Decl.h:505
const DeclContext * getParentFunctionOrMethod() const
If this decl is defined inside a function/method/block it returns the corresponding DeclContext...
Definition: DeclBase.cpp:243
void generateUSRForObjCClass(StringRef Cls, raw_ostream &OS, StringRef ExtSymbolDefinedIn="", StringRef CategoryContextExtSymbolDefinedIn="")
Generate a USR fragment for an Objective-C class.
VarDecl - An instance of this class is created to represent a variable declaration or definition...
Definition: Decl.h:806
const T * getAs() const
Member-template getAs<specific type>&#39;.
Definition: Type.h:6307
The "union" keyword.
Definition: Type.h:4696
The "__interface" keyword.
Definition: Type.h:4693
Represents a variable template specialization, which refers to a variable template with a given set o...
ObjCMethodDecl - Represents an instance or class method declaration.
Definition: DeclObjC.h:139
Stores a list of template parameters for a TemplateDecl and its derived classes.
Definition: DeclTemplate.h:68
ExternalSourceSymbolAttr * getExternalSourceSymbolAttr() const
Looks on this and related declarations for an applicable external source symbol attribute.
Definition: DeclBase.cpp:439
Describes how types, statements, expressions, and declarations should be printed. ...
Definition: PrettyPrinter.h:38
The collection of all-type qualifiers we support.
Definition: Type.h:152
DeclarationName getDeclName() const
getDeclName - Get the actual, stored name of the declaration, which may be a special name...
Definition: Decl.h:291
Represents a class template specialization, which refers to a class template with a given set of temp...
Represents a class type in Objective C.
Definition: Type.h:5186
static StringRef getUSRSpacePrefix()
Definition: USRGeneration.h:24
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:149
Record the location of a macro definition.
static bool printLoc(llvm::raw_ostream &OS, SourceLocation Loc, const SourceManager &SM, bool IncludeOffset)
FieldDecl - An instance of this class is created by Sema::ActOnField to represent a member of a struc...
Definition: Decl.h:2457
bool isClassProperty() const
Definition: DeclObjC.h:896
Represents a C++ using-declaration.
Definition: DeclCXX.h:3275
An rvalue reference type, per C++11 [dcl.ref].
Definition: Type.h:2486
ObjCContainerDecl - Represents a container for method declarations.
Definition: DeclObjC.h:986
TagKind getTagKind() const
Definition: Decl.h:3146
FunctionTemplateDecl * getDescribedFunctionTemplate() const
Retrieves the function template that is described by this function declaration.
Definition: Decl.cpp:3222
SourceLocation getExpansionLoc(SourceLocation Loc) const
Given a SourceLocation object Loc, return the expansion location referenced by the ID...
const Type * getTypePtr() const
Retrieves a pointer to the underlying (unqualified) type.
Definition: Type.h:5720
Represents an Objective-C protocol declaration.
Definition: DeclObjC.h:2083
Represents an ObjC class declaration.
Definition: DeclObjC.h:1191
Represents a linkage specification.
Definition: DeclCXX.h:2743
bool hasConst() const
Definition: Type.h:269
unsigned SuppressTemplateArgsInCXXConstructors
When true, suppresses printing template arguments in names of C++ constructors.
ObjCPropertyImplDecl - Represents implementation declaration of a property in a class or category imp...
Definition: DeclObjC.h:2778
bool hasAttr() const
Definition: DeclBase.h:535
Represents a prototype with parameter type info, e.g.
Definition: Type.h:3270
bool isInSystemHeader(SourceLocation Loc) const
Returns if a SourceLocation is in a system header.
const FileEntry * getFileEntryForID(FileID FID) const
Returns the FileEntry record for the provided FileID.
const FunctionProtoType * T
Declaration of a template type parameter.
const TemplateArgumentList * getTemplateSpecializationArgs() const
Retrieve the template arguments used to produce this function template specialization from the primar...
Definition: Decl.cpp:3343
DeclContext * getDeclContext()
Definition: DeclBase.h:425
NonTypeTemplateParmDecl - Declares a non-type template parameter, e.g., "Size" in.
Represents a C++ template name within the type system.
Definition: TemplateName.h:178
TemplateTemplateParmDecl - Declares a template template parameter, e.g., "T" in.
const SourceManager & SM
Definition: Format.cpp:1337
static StringRef GetExternalSourceContainer(const NamedDecl *D)
virtual void printName(raw_ostream &os) const
Definition: Decl.cpp:1467
The "struct" keyword.
Definition: Type.h:4690
Encodes a location in the source.
StringRef getName() const
Definition: FileManager.h:84
Interfaces are the core concept in Objective-C for object oriented design.
Definition: Type.h:5386
TagDecl - Represents the declaration of a struct/union/class/enum.
Definition: Decl.h:2934
ASTContext & getASTContext() const LLVM_READONLY
Definition: DeclBase.cpp:365
TagDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: Decl.cpp:3691
Represents a dependent using declaration which was not marked with typename.
Definition: DeclCXX.h:3494
Cached information about one file (either on disk or in the virtual file system). ...
Definition: FileManager.h:59
ObjCCategoryDecl - Represents a category declaration.
Definition: DeclObjC.h:2299
bool hasRestrict() const
Definition: Type.h:283
const IdentifierInfo * getName() const
Retrieve the name of the macro being defined.
Represents one property declaration in an Objective-C interface.
Definition: DeclObjC.h:746
bool SuppressTagKeyword
Whether type printing should skip printing the tag keyword.
Definition: PrettyPrinter.h:94
Represents a pack expansion of types.
Definition: Type.h:4996
StringRef getName() const
Return the actual identifier string.
Base class for declarations which introduce a typedef-name.
Definition: Decl.h:2792
Represents a template argument.
Definition: TemplateBase.h:51
const ObjCInterfaceDecl * getClassInterface() const
Definition: DeclObjC.h:2459
Dataflow Directional Tag Classes.
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
Definition: DeclBase.h:1252
bool isEmbeddedInDeclarator() const
Definition: Decl.h:3102
Represents a dependent using declaration which was marked with typename.
Definition: DeclCXX.h:3590
DeclarationName - The name of a declaration.
Kind getKind() const
Definition: DeclBase.h:419
void generateUSRForObjCProtocol(StringRef Prot, raw_ostream &OS, StringRef ExtSymbolDefinedIn="")
Generate a USR fragment for an Objective-C protocol.
Represents a pointer to an Objective C object.
Definition: Type.h:5442
Pointer to a block type.
Definition: Type.h:2387
Complex values, per C99 6.2.5p11.
Definition: Type.h:2225
SourceLocation getLocation() const
Retrieve the location of the macro name in the definition.
Base for LValueReferenceType and RValueReferenceType.
Definition: Type.h:2421
The "class" keyword.
Definition: Type.h:4699
SourceManager & getSourceManager()
Definition: ASTContext.h:643
bool IsClassExtension() const
Definition: DeclObjC.h:2409
CanQualType getCanonicalType(QualType T) const
Return the canonical (structural) type corresponding to the specified potentially non-canonical type ...
Definition: ASTContext.h:2174
A template argument list.
Definition: DeclTemplate.h:210
TypedefNameDecl * getTypedefNameForAnonDecl() const
Definition: Decl.h:3177
Represents a C++ struct/union/class.
Definition: DeclCXX.h:299
void generateUSRForObjCProperty(StringRef Prop, bool isClassProp, raw_ostream &OS)
Generate a USR fragment for an Objective-C property.
const ObjCInterfaceDecl * getObjContainingInterface(const NamedDecl *ND) const
Returns the Objective-C interface that ND belongs to if it is an Objective-C method/property/ivar etc...
Qualifiers getQualifiers() const
Retrieve the set of qualifiers applied to this type.
Definition: Type.h:5747
The "enum" keyword.
Definition: Type.h:4702
Declaration of a class template.
This class is used for builtin types like &#39;int&#39;.
Definition: Type.h:2145
void print(raw_ostream &OS, const PrintingPolicy &Policy)
StringRef getName() const
getName - Get the name of identifier for this declaration as a StringRef.
Definition: Decl.h:270
bool hasVolatile() const
Definition: Type.h:276
Represents a type template specialization; the template must be a class template, a type alias templa...
Definition: Type.h:4495
ObjCPropertyDecl * getPropertyDecl() const
Definition: DeclObjC.h:2837
NamedDecl - This represents a decl with a name.
Definition: Decl.h:245
Represents a C++ namespace alias.
Definition: DeclCXX.h:2947
Represents C++ using-directive.
Definition: DeclCXX.h:2843
A simple visitor class that helps create declaration visitors.
Definition: DeclVisitor.h:77
bool isFreeStanding() const
Definition: Decl.h:3109
const LangOptions & getLangOpts() const
Definition: ASTContext.h:688
ObjCCategoryImplDecl - An object of this class encapsulates a category @implementation declaration...
Definition: DeclObjC.h:2518
This class handles loading and caching of source files into memory.
Declaration of a template function.
Definition: DeclTemplate.h:967
SourceLocation getLocation() const
Definition: DeclBase.h:416
bool isExternallyVisible() const
Definition: Decl.h:370
std::pair< FileID, unsigned > getDecomposedLoc(SourceLocation Loc) const
Decompose the specified location into a raw FileID + Offset pair.