chore: move TagTypeKind conversion to ASTVisitorHelpers

Author: sdkrystian

source/AST/ASTVisitor.cpp

@@ -788,21 +788,7 @@ buildRecord(
     else
         I.Loc.emplace_back(line, File_.str(), IsFileInRootDir_);
 
-    switch(D->getTagKind())
-    {
-    case TagTypeKind::TTK_Struct:
-        I.KeyKind = RecordKeyKind::Struct;
-        break;
-    case TagTypeKind::TTK_Class:
-        I.KeyKind = RecordKeyKind::Class;
-        break;
-    case TagTypeKind::TTK_Union:
-        I.KeyKind = RecordKeyKind::Union;
-        break;
-    default:
-        // unsupported TagTypeKind
-        MRDOX_UNREACHABLE();
-    }
+    I.KeyKind = convertToRecordKeyKind(D->getTagKind());
 
     // These are from CXXRecordDecl::isEffectivelyFinal()
     I.specs.isFinal = D->template hasAttr<FinalAttr>();

source/AST/ASTVisitorHelpers.hpp

@@ -202,6 +202,23 @@ convertToReferenceKind(
     }
 }
 
+RecordKeyKind
+convertToRecordKeyKind(
+    TagTypeKind kind)
+{
+    using OldKind = TagTypeKind;
+    using NewKind = RecordKeyKind;
+    switch(kind)
+    {
+    case OldKind::TTK_Struct: return NewKind::Struct;
+    case OldKind::TTK_Class:  return NewKind::Class;
+    case OldKind::TTK_Union:  return NewKind::Union;
+    default:
+        // unsupported TagTypeKind
+        MRDOX_UNREACHABLE();
+    }
+}
+
 template<typename T, typename... Args>
 void insertChild(NamespaceInfo& I, Args&&... args)
 {