WIP: add a Val struct as an input/output when calling a function

src/model.cpp

@@ -2113,6 +2113,13 @@ bool Model::convert_to_bool(const pt::Space & space)
 }
 
 
+void Model::put_bool_to_stream(bool val, pt::Stream & str)
+{
+	if( val )
+		str << L"true";
+	else
+		str << L"false";
+}
 
 
 } // namespace