Support for pydantic dataclasses

[arogozhnikov]

Hi Patrick, randomly found this package and decided to give it a try.

For context, I use devtools for pprinting/pformatting of pydantics + dataclasses.
It works very well with a quirk of using multilines when it's not necessary.

I've tried adding custom _pformat, but it apparently is not applied recursively (to nested pydantics).

[patrick-kidger]

Hey there! Glad you found this :)

I've tried adding custom _pformat, but it apparently is not applied recursively (to nested pydantics).

This can/will happen if you call pformat(..., custom=custom) from inside custom! Take a look at how _pformat_dataclass works for example, by forwarding on the **kwargs which include custom:

wadler_lindig/wadler_lindig/_definitions.py

Line 308 in 03ed125

def _pformat_dataclass(obj, **kwargs) -> AbstractDoc:

That said, it'd also be reasonable to support pydantic out-of-the-box. I'd be happy to take a PR on this.