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