typeclass tree start

src/types.cpp

@@ -436,6 +436,36 @@ std::optional<utils::IdType> Type::GetFieldType(const std::string& name) const {
   return std::nullopt;
 }
 
+std::string Type::GetTypeName() const {
+  size_t index = type_.index();
+
+  switch (index) {
+  case 0:
+    return "AbstractType";
+  case 1:
+    return "DefinedType";
+  case 2:
+    return "Builtin";
+  case 3:
+    return "TupleType";
+  case 4:
+    return "VariantType";
+  case 5:
+    return "ReferenceToType";
+  case 6:
+    return "FunctionType";
+  case 7:
+    return "ArrayType";
+  case 8:
+    return "OptionalType";
+  default:
+    // error
+    break;
+  }
+
+  return ""; // ??
+}
+
 //
 
 template<typename T>