IndexSymbol.cpp revision 360784 
1//===--- IndexSymbol.cpp - Types and functions for indexing symbols -------===//
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/Index/IndexSymbol.h"
10#include "clang/AST/Attr.h"
11#include "clang/AST/DeclCXX.h"
12#include "clang/AST/DeclObjC.h"
13#include "clang/AST/DeclTemplate.h"
14#include "clang/AST/PrettyPrinter.h"
15#include "clang/Lex/MacroInfo.h"
16
17using namespace clang;
18using namespace clang::index;
19
20/// \returns true if \c D is a subclass of 'XCTestCase'.
21static bool isUnitTestCase(const ObjCInterfaceDecl *D) {
22  if (!D)
23    return false;
24  while (const ObjCInterfaceDecl *SuperD = D->getSuperClass()) {
25    if (SuperD->getName() == "XCTestCase")
26      return true;
27    D = SuperD;
28  }
29  return false;
30}
31
32/// \returns true if \c D is in a subclass of 'XCTestCase', returns void, has
33/// no parameters, and its name starts with 'test'.
34static bool isUnitTest(const ObjCMethodDecl *D) {
35  if (!D->parameters().empty())
36    return false;
37  if (!D->getReturnType()->isVoidType())
38    return false;
39  if (!D->getSelector().getNameForSlot(0).startswith("test"))
40    return false;
41  return isUnitTestCase(D->getClassInterface());
42}
43
44static void checkForIBOutlets(const Decl *D, SymbolPropertySet &PropSet) {
45  if (D->hasAttr<IBOutletAttr>()) {
46    PropSet |= (SymbolPropertySet)SymbolProperty::IBAnnotated;
47  } else if (D->hasAttr<IBOutletCollectionAttr>()) {
48    PropSet |= (SymbolPropertySet)SymbolProperty::IBAnnotated;
49    PropSet |= (SymbolPropertySet)SymbolProperty::IBOutletCollection;
50  }
51}
52
53bool index::isFunctionLocalSymbol(const Decl *D) {
54  assert(D);
55
56  if (isa<ParmVarDecl>(D))
57    return true;
58
59  if (isa<ObjCTypeParamDecl>(D))
60    return true;
61
62  if (isa<UsingDirectiveDecl>(D))
63    return false;
64  if (!D->getParentFunctionOrMethod())
65    return false;
66
67  if (const NamedDecl *ND = dyn_cast<NamedDecl>(D)) {
68    switch (ND->getFormalLinkage()) {
69      case NoLinkage:
70      case InternalLinkage:
71        return true;
72      case VisibleNoLinkage:
73      case UniqueExternalLinkage:
74      case ModuleInternalLinkage:
75        llvm_unreachable("Not a sema linkage");
76      case ModuleLinkage:
77      case ExternalLinkage:
78        return false;
79    }
80  }
81
82  return true;
83}
84
85SymbolInfo index::getSymbolInfo(const Decl *D) {
86  assert(D);
87  SymbolInfo Info;
88  Info.Kind = SymbolKind::Unknown;
89  Info.SubKind = SymbolSubKind::None;
90  Info.Properties = SymbolPropertySet();
91  Info.Lang = SymbolLanguage::C;
92
93  if (isFunctionLocalSymbol(D)) {
94    Info.Properties |= (SymbolPropertySet)SymbolProperty::Local;
95  }
96  if (isa<ObjCProtocolDecl>(D->getDeclContext())) {
97    Info.Properties |= (SymbolPropertySet)SymbolProperty::ProtocolInterface;
98  }
99
100  if (auto *VT = dyn_cast<VarTemplateDecl>(D)) {
101    Info.Properties |= (SymbolPropertySet)SymbolProperty::Generic;
102    Info.Lang = SymbolLanguage::CXX;
103    // All other fields are filled from the templated decl.
104    D = VT->getTemplatedDecl();
105  }
106
107  if (const TagDecl *TD = dyn_cast<TagDecl>(D)) {
108    switch (TD->getTagKind()) {
109    case TTK_Struct:
110      Info.Kind = SymbolKind::Struct; break;
111    case TTK_Union:
112      Info.Kind = SymbolKind::Union; break;
113    case TTK_Class:
114      Info.Kind = SymbolKind::Class;
115      Info.Lang = SymbolLanguage::CXX;
116      break;
117    case TTK_Interface:
118      Info.Kind = SymbolKind::Protocol;
119      Info.Lang = SymbolLanguage::CXX;
120      break;
121    case TTK_Enum:
122      Info.Kind = SymbolKind::Enum; break;
123    }
124
125    if (const CXXRecordDecl *CXXRec = dyn_cast<CXXRecordDecl>(D)) {
126      if (!CXXRec->isCLike()) {
127        Info.Lang = SymbolLanguage::CXX;
128        if (CXXRec->getDescribedClassTemplate()) {
129          Info.Properties |= (SymbolPropertySet)SymbolProperty::Generic;
130        }
131      }
132    }
133
134    if (isa<ClassTemplatePartialSpecializationDecl>(D)) {
135      Info.Properties |= (SymbolPropertySet)SymbolProperty::Generic;
136      Info.Properties |=
137          (SymbolPropertySet)SymbolProperty::TemplatePartialSpecialization;
138    } else if (isa<ClassTemplateSpecializationDecl>(D)) {
139      Info.Properties |= (SymbolPropertySet)SymbolProperty::Generic;
140      Info.Properties |=
141          (SymbolPropertySet)SymbolProperty::TemplateSpecialization;
142    }
143
144  } else if (auto *VD = dyn_cast<VarDecl>(D)) {
145    Info.Kind = SymbolKind::Variable;
146    if (isa<ParmVarDecl>(D)) {
147      Info.Kind = SymbolKind::Parameter;
148    } else if (isa<CXXRecordDecl>(D->getDeclContext())) {
149      Info.Kind = SymbolKind::StaticProperty;
150      Info.Lang = SymbolLanguage::CXX;
151    }
152
153    if (isa<VarTemplatePartialSpecializationDecl>(D)) {
154      Info.Lang = SymbolLanguage::CXX;
155      Info.Properties |= (SymbolPropertySet)SymbolProperty::Generic;
156      Info.Properties |=
157          (SymbolPropertySet)SymbolProperty::TemplatePartialSpecialization;
158    } else if (isa<VarTemplateSpecializationDecl>(D)) {
159      Info.Lang = SymbolLanguage::CXX;
160      Info.Properties |= (SymbolPropertySet)SymbolProperty::Generic;
161      Info.Properties |=
162          (SymbolPropertySet)SymbolProperty::TemplateSpecialization;
163    } else if (VD->getDescribedVarTemplate()) {
164      Info.Lang = SymbolLanguage::CXX;
165      Info.Properties |= (SymbolPropertySet)SymbolProperty::Generic;
166    }
167
168  } else {
169    switch (D->getKind()) {
170    case Decl::Import:
171      Info.Kind = SymbolKind::Module;
172      break;
173    case Decl::Typedef:
174      Info.Kind = SymbolKind::TypeAlias; break; // Lang = C
175    case Decl::Function:
176      Info.Kind = SymbolKind::Function;
177      break;
178    case Decl::Field:
179    case Decl::IndirectField:
180      Info.Kind = SymbolKind::Field;
181      if (const CXXRecordDecl *
182            CXXRec = dyn_cast<CXXRecordDecl>(D->getDeclContext())) {
183        if (!CXXRec->isCLike())
184          Info.Lang = SymbolLanguage::CXX;
185      }
186      break;
187    case Decl::EnumConstant:
188      Info.Kind = SymbolKind::EnumConstant; break;
189    case Decl::ObjCInterface:
190    case Decl::ObjCImplementation: {
191      Info.Kind = SymbolKind::Class;
192      Info.Lang = SymbolLanguage::ObjC;
193      const ObjCInterfaceDecl *ClsD = dyn_cast<ObjCInterfaceDecl>(D);
194      if (!ClsD)
195        ClsD = cast<ObjCImplementationDecl>(D)->getClassInterface();
196      if (isUnitTestCase(ClsD))
197        Info.Properties |= (SymbolPropertySet)SymbolProperty::UnitTest;
198      break;
199    }
200    case Decl::ObjCProtocol:
201      Info.Kind = SymbolKind::Protocol;
202      Info.Lang = SymbolLanguage::ObjC;
203      break;
204    case Decl::ObjCCategory:
205    case Decl::ObjCCategoryImpl: {
206      Info.Kind = SymbolKind::Extension;
207      Info.Lang = SymbolLanguage::ObjC;
208      const ObjCInterfaceDecl *ClsD = nullptr;
209      if (auto *CatD = dyn_cast<ObjCCategoryDecl>(D))
210        ClsD = CatD->getClassInterface();
211      else
212        ClsD = cast<ObjCCategoryImplDecl>(D)->getClassInterface();
213      if (isUnitTestCase(ClsD))
214        Info.Properties |= (SymbolPropertySet)SymbolProperty::UnitTest;
215      break;
216    }
217    case Decl::ObjCMethod: {
218      const ObjCMethodDecl *MD = cast<ObjCMethodDecl>(D);
219      Info.Kind = MD->isInstanceMethod() ? SymbolKind::InstanceMethod : SymbolKind::ClassMethod;
220      if (MD->isPropertyAccessor()) {
221        if (MD->param_size())
222          Info.SubKind = SymbolSubKind::AccessorSetter;
223        else
224          Info.SubKind = SymbolSubKind::AccessorGetter;
225      }
226      Info.Lang = SymbolLanguage::ObjC;
227      if (isUnitTest(MD))
228        Info.Properties |= (SymbolPropertySet)SymbolProperty::UnitTest;
229      if (D->hasAttr<IBActionAttr>())
230        Info.Properties |= (SymbolPropertySet)SymbolProperty::IBAnnotated;
231      break;
232    }
233    case Decl::ObjCProperty:
234      Info.Kind = SymbolKind::InstanceProperty;
235      Info.Lang = SymbolLanguage::ObjC;
236      checkForIBOutlets(D, Info.Properties);
237      if (auto *Annot = D->getAttr<AnnotateAttr>()) {
238        if (Annot->getAnnotation() == "gk_inspectable")
239          Info.Properties |= (SymbolPropertySet)SymbolProperty::GKInspectable;
240      }
241      break;
242    case Decl::ObjCIvar:
243      Info.Kind = SymbolKind::Field;
244      Info.Lang = SymbolLanguage::ObjC;
245      checkForIBOutlets(D, Info.Properties);
246      break;
247    case Decl::Namespace:
248      Info.Kind = SymbolKind::Namespace;
249      Info.Lang = SymbolLanguage::CXX;
250      break;
251    case Decl::NamespaceAlias:
252      Info.Kind = SymbolKind::NamespaceAlias;
253      Info.Lang = SymbolLanguage::CXX;
254      break;
255    case Decl::CXXConstructor: {
256      Info.Kind = SymbolKind::Constructor;
257      Info.Lang = SymbolLanguage::CXX;
258      auto *CD = cast<CXXConstructorDecl>(D);
259      if (CD->isCopyConstructor())
260        Info.SubKind = SymbolSubKind::CXXCopyConstructor;
261      else if (CD->isMoveConstructor())
262        Info.SubKind = SymbolSubKind::CXXMoveConstructor;
263      break;
264    }
265    case Decl::CXXDestructor:
266      Info.Kind = SymbolKind::Destructor;
267      Info.Lang = SymbolLanguage::CXX;
268      break;
269    case Decl::CXXConversion:
270      Info.Kind = SymbolKind::ConversionFunction;
271      Info.Lang = SymbolLanguage::CXX;
272      break;
273    case Decl::CXXMethod: {
274      const CXXMethodDecl *MD = cast<CXXMethodDecl>(D);
275      if (MD->isStatic())
276        Info.Kind = SymbolKind::StaticMethod;
277      else
278        Info.Kind = SymbolKind::InstanceMethod;
279      Info.Lang = SymbolLanguage::CXX;
280      break;
281    }
282    case Decl::ClassTemplate:
283      Info.Kind = SymbolKind::Class;
284      Info.Properties |= (SymbolPropertySet)SymbolProperty::Generic;
285      Info.Lang = SymbolLanguage::CXX;
286      break;
287    case Decl::FunctionTemplate:
288      Info.Kind = SymbolKind::Function;
289      Info.Properties |= (SymbolPropertySet)SymbolProperty::Generic;
290      Info.Lang = SymbolLanguage::CXX;
291      if (const CXXMethodDecl *MD = dyn_cast_or_null<CXXMethodDecl>(
292                           cast<FunctionTemplateDecl>(D)->getTemplatedDecl())) {
293        if (isa<CXXConstructorDecl>(MD))
294          Info.Kind = SymbolKind::Constructor;
295        else if (isa<CXXDestructorDecl>(MD))
296          Info.Kind = SymbolKind::Destructor;
297        else if (isa<CXXConversionDecl>(MD))
298          Info.Kind = SymbolKind::ConversionFunction;
299        else {
300          if (MD->isStatic())
301            Info.Kind = SymbolKind::StaticMethod;
302          else
303            Info.Kind = SymbolKind::InstanceMethod;
304        }
305      }
306      break;
307    case Decl::TypeAliasTemplate:
308      Info.Kind = SymbolKind::TypeAlias;
309      Info.Lang = SymbolLanguage::CXX;
310      Info.Properties |= (SymbolPropertySet)SymbolProperty::Generic;
311      break;
312    case Decl::TypeAlias:
313      Info.Kind = SymbolKind::TypeAlias;
314      Info.Lang = SymbolLanguage::CXX;
315      break;
316    case Decl::UnresolvedUsingTypename:
317      Info.Kind = SymbolKind::Using;
318      Info.SubKind = SymbolSubKind::UsingTypename;
319      Info.Lang = SymbolLanguage::CXX;
320      Info.Properties |= (SymbolPropertySet)SymbolProperty::Generic;
321      break;
322    case Decl::UnresolvedUsingValue:
323      Info.Kind = SymbolKind::Using;
324      Info.SubKind = SymbolSubKind::UsingValue;
325      Info.Lang = SymbolLanguage::CXX;
326      Info.Properties |= (SymbolPropertySet)SymbolProperty::Generic;
327      break;
328    case Decl::Using:
329      Info.Kind = SymbolKind::Using;
330      Info.Lang = SymbolLanguage::CXX;
331      break;
332    case Decl::Binding:
333      Info.Kind = SymbolKind::Variable;
334      Info.Lang = SymbolLanguage::CXX;
335      break;
336    case Decl::MSProperty:
337      Info.Kind = SymbolKind::InstanceProperty;
338      if (const CXXRecordDecl *CXXRec =
339              dyn_cast<CXXRecordDecl>(D->getDeclContext())) {
340        if (!CXXRec->isCLike())
341          Info.Lang = SymbolLanguage::CXX;
342      }
343      break;
344    case Decl::ClassTemplatePartialSpecialization:
345    case Decl::ClassScopeFunctionSpecialization:
346    case Decl::ClassTemplateSpecialization:
347    case Decl::CXXRecord:
348    case Decl::Enum:
349    case Decl::Record:
350      llvm_unreachable("records handled before");
351      break;
352    case Decl::VarTemplateSpecialization:
353    case Decl::VarTemplatePartialSpecialization:
354    case Decl::ImplicitParam:
355    case Decl::ParmVar:
356    case Decl::Var:
357    case Decl::VarTemplate:
358      llvm_unreachable("variables handled before");
359      break;
360    // Other decls get the 'unknown' kind.
361    default:
362      break;
363    }
364  }
365
366  if (Info.Kind == SymbolKind::Unknown)
367    return Info;
368
369  if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
370    if (FD->getTemplatedKind() ==
371          FunctionDecl::TK_FunctionTemplateSpecialization) {
372      Info.Properties |= (SymbolPropertySet)SymbolProperty::Generic;
373      Info.Properties |=
374          (SymbolPropertySet)SymbolProperty::TemplateSpecialization;
375    }
376  }
377
378  if (Info.Properties & (SymbolPropertySet)SymbolProperty::Generic)
379    Info.Lang = SymbolLanguage::CXX;
380
381  if (auto *attr = D->getExternalSourceSymbolAttr()) {
382    if (attr->getLanguage() == "Swift")
383      Info.Lang = SymbolLanguage::Swift;
384  }
385
386  return Info;
387}
388
389SymbolInfo index::getSymbolInfoForMacro(const MacroInfo &) {
390  SymbolInfo Info;
391  Info.Kind = SymbolKind::Macro;
392  Info.SubKind = SymbolSubKind::None;
393  Info.Properties = SymbolPropertySet();
394  Info.Lang = SymbolLanguage::C;
395  return Info;
396}
397
398bool index::applyForEachSymbolRoleInterruptible(SymbolRoleSet Roles,
399                                   llvm::function_ref<bool(SymbolRole)> Fn) {
400#define APPLY_FOR_ROLE(Role) \
401  if (Roles & (unsigned)SymbolRole::Role) \
402    if (!Fn(SymbolRole::Role)) \
403      return false;
404
405  APPLY_FOR_ROLE(Declaration);
406  APPLY_FOR_ROLE(Definition);
407  APPLY_FOR_ROLE(Reference);
408  APPLY_FOR_ROLE(Read);
409  APPLY_FOR_ROLE(Write);
410  APPLY_FOR_ROLE(Call);
411  APPLY_FOR_ROLE(Dynamic);
412  APPLY_FOR_ROLE(AddressOf);
413  APPLY_FOR_ROLE(Implicit);
414  APPLY_FOR_ROLE(Undefinition);
415  APPLY_FOR_ROLE(RelationChildOf);
416  APPLY_FOR_ROLE(RelationBaseOf);
417  APPLY_FOR_ROLE(RelationOverrideOf);
418  APPLY_FOR_ROLE(RelationReceivedBy);
419  APPLY_FOR_ROLE(RelationCalledBy);
420  APPLY_FOR_ROLE(RelationExtendedBy);
421  APPLY_FOR_ROLE(RelationAccessorOf);
422  APPLY_FOR_ROLE(RelationContainedBy);
423  APPLY_FOR_ROLE(RelationIBTypeOf);
424  APPLY_FOR_ROLE(RelationSpecializationOf);
425  APPLY_FOR_ROLE(NameReference);
426
427#undef APPLY_FOR_ROLE
428
429  return true;
430}
431
432void index::applyForEachSymbolRole(SymbolRoleSet Roles,
433                                   llvm::function_ref<void(SymbolRole)> Fn) {
434  applyForEachSymbolRoleInterruptible(Roles, [&](SymbolRole r) -> bool {
435    Fn(r);
436    return true;
437  });
438}
439
440void index::printSymbolRoles(SymbolRoleSet Roles, raw_ostream &OS) {
441  bool VisitedOnce = false;
442  applyForEachSymbolRole(Roles, [&](SymbolRole Role) {
443    if (VisitedOnce)
444      OS << ',';
445    else
446      VisitedOnce = true;
447    switch (Role) {
448    case SymbolRole::Declaration: OS << "Decl"; break;
449    case SymbolRole::Definition: OS << "Def"; break;
450    case SymbolRole::Reference: OS << "Ref"; break;
451    case SymbolRole::Read: OS << "Read"; break;
452    case SymbolRole::Write: OS << "Writ"; break;
453    case SymbolRole::Call: OS << "Call"; break;
454    case SymbolRole::Dynamic: OS << "Dyn"; break;
455    case SymbolRole::AddressOf: OS << "Addr"; break;
456    case SymbolRole::Implicit: OS << "Impl"; break;
457    case SymbolRole::Undefinition: OS << "Undef"; break;
458    case SymbolRole::RelationChildOf: OS << "RelChild"; break;
459    case SymbolRole::RelationBaseOf: OS << "RelBase"; break;
460    case SymbolRole::RelationOverrideOf: OS << "RelOver"; break;
461    case SymbolRole::RelationReceivedBy: OS << "RelRec"; break;
462    case SymbolRole::RelationCalledBy: OS << "RelCall"; break;
463    case SymbolRole::RelationExtendedBy: OS << "RelExt"; break;
464    case SymbolRole::RelationAccessorOf: OS << "RelAcc"; break;
465    case SymbolRole::RelationContainedBy: OS << "RelCont"; break;
466    case SymbolRole::RelationIBTypeOf: OS << "RelIBType"; break;
467    case SymbolRole::RelationSpecializationOf: OS << "RelSpecialization"; break;
468    case SymbolRole::NameReference: OS << "NameReference"; break;
469    }
470  });
471}
472
473bool index::printSymbolName(const Decl *D, const LangOptions &LO,
474                            raw_ostream &OS) {
475  if (auto *ND = dyn_cast<NamedDecl>(D)) {
476    PrintingPolicy Policy(LO);
477    // Forward references can have different template argument names. Suppress
478    // the template argument names in constructors to make their name more
479    // stable.
480    Policy.SuppressTemplateArgsInCXXConstructors = true;
481    DeclarationName DeclName = ND->getDeclName();
482    if (DeclName.isEmpty())
483      return true;
484    DeclName.print(OS, Policy);
485    return false;
486  } else {
487    return true;
488  }
489}
490
491StringRef index::getSymbolKindString(SymbolKind K) {
492  switch (K) {
493  case SymbolKind::Unknown: return "<unknown>";
494  case SymbolKind::Module: return "module";
495  case SymbolKind::Namespace: return "namespace";
496  case SymbolKind::NamespaceAlias: return "namespace-alias";
497  case SymbolKind::Macro: return "macro";
498  case SymbolKind::Enum: return "enum";
499  case SymbolKind::Struct: return "struct";
500  case SymbolKind::Class: return "class";
501  case SymbolKind::Protocol: return "protocol";
502  case SymbolKind::Extension: return "extension";
503  case SymbolKind::Union: return "union";
504  case SymbolKind::TypeAlias: return "type-alias";
505  case SymbolKind::Function: return "function";
506  case SymbolKind::Variable: return "variable";
507  case SymbolKind::Field: return "field";
508  case SymbolKind::EnumConstant: return "enumerator";
509  case SymbolKind::InstanceMethod: return "instance-method";
510  case SymbolKind::ClassMethod: return "class-method";
511  case SymbolKind::StaticMethod: return "static-method";
512  case SymbolKind::InstanceProperty: return "instance-property";
513  case SymbolKind::ClassProperty: return "class-property";
514  case SymbolKind::StaticProperty: return "static-property";
515  case SymbolKind::Constructor: return "constructor";
516  case SymbolKind::Destructor: return "destructor";
517  case SymbolKind::ConversionFunction: return "conversion-func";
518  case SymbolKind::Parameter: return "param";
519  case SymbolKind::Using: return "using";
520  }
521  llvm_unreachable("invalid symbol kind");
522}
523
524StringRef index::getSymbolSubKindString(SymbolSubKind K) {
525  switch (K) {
526  case SymbolSubKind::None: return "<none>";
527  case SymbolSubKind::CXXCopyConstructor: return "cxx-copy-ctor";
528  case SymbolSubKind::CXXMoveConstructor: return "cxx-move-ctor";
529  case SymbolSubKind::AccessorGetter: return "acc-get";
530  case SymbolSubKind::AccessorSetter: return "acc-set";
531  case SymbolSubKind::UsingTypename: return "using-typename";
532  case SymbolSubKind::UsingValue: return "using-value";
533  }
534  llvm_unreachable("invalid symbol subkind");
535}
536
537StringRef index::getSymbolLanguageString(SymbolLanguage K) {
538  switch (K) {
539  case SymbolLanguage::C: return "C";
540  case SymbolLanguage::ObjC: return "ObjC";
541  case SymbolLanguage::CXX: return "C++";
542  case SymbolLanguage::Swift: return "Swift";
543  }
544  llvm_unreachable("invalid symbol language kind");
545}
546
547void index::applyForEachSymbolProperty(SymbolPropertySet Props,
548                                  llvm::function_ref<void(SymbolProperty)> Fn) {
549#define APPLY_FOR_PROPERTY(K)                                                  \
550  if (Props & (SymbolPropertySet)SymbolProperty::K)                            \
551  Fn(SymbolProperty::K)
552
553  APPLY_FOR_PROPERTY(Generic);
554  APPLY_FOR_PROPERTY(TemplatePartialSpecialization);
555  APPLY_FOR_PROPERTY(TemplateSpecialization);
556  APPLY_FOR_PROPERTY(UnitTest);
557  APPLY_FOR_PROPERTY(IBAnnotated);
558  APPLY_FOR_PROPERTY(IBOutletCollection);
559  APPLY_FOR_PROPERTY(GKInspectable);
560  APPLY_FOR_PROPERTY(Local);
561  APPLY_FOR_PROPERTY(ProtocolInterface);
562
563#undef APPLY_FOR_PROPERTY
564}
565
566void index::printSymbolProperties(SymbolPropertySet Props, raw_ostream &OS) {
567  bool VisitedOnce = false;
568  applyForEachSymbolProperty(Props, [&](SymbolProperty Prop) {
569    if (VisitedOnce)
570      OS << ',';
571    else
572      VisitedOnce = true;
573    switch (Prop) {
574    case SymbolProperty::Generic: OS << "Gen"; break;
575    case SymbolProperty::TemplatePartialSpecialization: OS << "TPS"; break;
576    case SymbolProperty::TemplateSpecialization: OS << "TS"; break;
577    case SymbolProperty::UnitTest: OS << "test"; break;
578    case SymbolProperty::IBAnnotated: OS << "IB"; break;
579    case SymbolProperty::IBOutletCollection: OS << "IBColl"; break;
580    case SymbolProperty::GKInspectable: OS << "GKI"; break;
581    case SymbolProperty::Local: OS << "local"; break;
582    case SymbolProperty::ProtocolInterface: OS << "protocol"; break;
583    }
584  });
585}
586