[index] Improve indexing support for MSPropertyDecl.

[vsapsai]

Summary

Currently the symbol for MSPropertyDecl has kind SymbolKind::Unknown
which can trip up various indexing tools.

rdar://problem/46764224

[vsapsai]

Ping.

[vsapsai]

Ping.

[jkorous]

LGTM

Thanks for looking into this!

[vsapsai]

Thanks for reviewing the change!

clang/lib/Index/IndexDecl.cpp

if (D->getSynthesize()) {
       return true;
     }
     TRY_DECL(D, IndexCtx.handleDecl(D));
     handleDeclarator(D);
     return true;
   }
 
   bool VisitMSPropertyDecl(const MSPropertyDecl *D) {
+    TRY_DECL(D, IndexCtx.handleDecl(D));
     handleDeclarator(D);
     return true;
   }
 
   bool VisitEnumConstantDecl(const EnumConstantDecl *D) {
     TRY_DECL(D, IndexCtx.handleDecl(D));
     IndexCtx.indexBody(D->getInitExpr(), D);
     return true;

clang/lib/Index/IndexSymbol.cpp

case Decl::UnresolvedUsingValue:
       Info.SubKind = SymbolSubKind::UsingValue;
       Info.Lang = SymbolLanguage::CXX;
       Info.Properties |= (SymbolPropertySet)SymbolProperty::Generic;
       break;
     case Decl::Binding:
       Info.Kind = SymbolKind::Variable;
       Info.Lang = SymbolLanguage::CXX;
       break;
+    case Decl::MSProperty:
+      Info.Kind = SymbolKind::InstanceProperty;
+      if (const CXXRecordDecl *CXXRec =
+              dyn_cast<CXXRecordDecl>(D->getDeclContext())) {
+        if (!CXXRec->isCLike())
+          Info.Lang = SymbolLanguage::CXX;
+      }
+      break;
     default:
       break;
     }
   }
 
   if (Info.Kind == SymbolKind::Unknown)
     return Info;
 

clang/test/Index/ms-property.cpp

+// RUN: c-index-test core -print-source-symbols -- -fms-extensions -fno-ms-compatibility %s | FileCheck %s
+
+// CHECK: [[@LINE+1]]:8 | struct/C++ | Simple | [[Simple_USR:.*]] | <no-cgname> | Def | rel: 0
+struct Simple {
+  int GetX() const;
+  // CHECK: [[@LINE-1]]:7 | instance-method/C++ | GetX | [[GetX_USR:.*]] | __ZNK6Simple4GetXEv | Decl,RelChild | rel: 1
+  // CHECK-NEXT: RelChild | Simple | [[Simple_USR]]
+
+  void PutX(int i);
+  // CHECK: [[@LINE-1]]:8 | instance-method/C++ | PutX | [[PutX_USR:.*]] | __ZN6Simple4PutXEi | Decl,RelChild | rel: 1
+  // CHECK-NEXT: RelChild | Simple | [[Simple_USR]]
+
+  __declspec(property(get=GetX, put=PutX)) int propX;
+  // CHECK: [[@LINE-1]]:48 | instance-property/C++ | propX | [[propX_USR:.*]] | <no-cgname> | Def,RelChild | rel: 1
+  // CHECK-NEXT: RelChild | Simple | [[Simple_USR]]
+};
+
+// CHECK: [[@LINE+1]]:5 | function/C | test | [[test_USR:.*]] | __Z4testv | Def | rel: 0
+int test() {
+  Simple s;
+  s.propX = 5;
+  // CHECK: [[@LINE-1]]:5 | instance-property/C++ | propX | [[propX_USR]] | <no-cgname> | Ref,RelCont | rel: 1
+  // CHECK-NEXT: RelCont | test | [[test_USR]]
+  // CHECK: [[@LINE-3]]:5 | instance-method/C++ | PutX | [[PutX_USR]] | __ZN6Simple4PutXEi | Ref,Call,RelCall,RelCont | rel: 1
+  // CHECK-NEXT: RelCall,RelCont | test | [[test_USR]]
+
+  return s.propX;
+  // CHECK: [[@LINE-1]]:12 | instance-property/C++ | propX | [[propX_USR]] | <no-cgname> | Ref,RelCont | rel: 1
+  // CHECK-NEXT: RelCont | test | [[test_USR]]
+  // CHECK: [[@LINE-3]]:12 | instance-method/C++ | GetX | [[GetX_USR]] | __ZNK6Simple4GetXEv | Ref,Call,RelCall,RelCont | rel: 1
+  // CHECK-NEXT: RelCall,RelCont | test | [[test_USR]]
+}