Would it be better to put `(*unified_value_type)->repr_str()` here?    It looks similar to  https://github.com/pytorch/pytorch/blob/9a85167d22cf044968fc1b40a9bca47df9697a9b/torch/csrc/jit/frontend/ir_emitter.cpp#L1462-L1467    note: I'm not familiar with the code here, I just encounter the same problem recently.