On Mon, Apr 25, 2022 at 10:32:15PM -0700, Larry Hastings wrote: [...] > Whichever spelling we use here, the key idea is that C is bound to a > "ForwardClass" object. A "ForwardClass" object is /not/ a class, it's a > forward declaration of a class. (I suspect ForwardClass is similar to a > typing.ForwardRef, though I've never worked with those so I couldn't say > for sure.)
I know that the three devs working on this plan (Larry, Barry, Mark) are extremely competent, well-respected people, but this proto-PEP really feels to me like you aren't heavy users of typing and are proposing an extremely complex, complicated, problematic "solution" which even the typing people don't want. Carl Meyer has repeatedly said that this proposal won't solve the issues that you have designed it to solve. I don't think you have responded to him either time, which is worrying. https://mail.python.org/archives/list/python-dev@python.org/message/NMCS77YFM2V54PUB66AXEFTE4NXFHWPI/ https://mail.python.org/archives/list/python-dev@python.org/message/RVQSLD435BFKEVIMY2AIA5MCJB37BPHK/ Now Carl is only one person, and not necessarily representative, but Jelle Zijlstra is also heavily involved with mypy and typeshed and has expressed serious doubts about this proposal as well. So unless somebody with solid experience in typing contradict Carl and Jelle, we ought to take their comments as definitive and trust them that these "ForwardClass" objects won't solve the problem of forward declarations (or indeed that the problem doesn't really need solving beyond the two PEPs already on the table, plus stringified types). I realise that you have invested a lot of time and energy into this proto-PEP, but if it fails to solve the forward declaration problem, and introduces problems of its own, then maybe we should not fall into the Sunk Costs fallacy by continuing to debate the best syntax and implementation for something that we don't need. -- Steve _______________________________________________ Python-Dev mailing list -- python-dev@python.org To unsubscribe send an email to python-dev-le...@python.org https://mail.python.org/mailman3/lists/python-dev.python.org/ Message archived at https://mail.python.org/archives/list/python-dev@python.org/message/7JIR2D3WUCHHXVTQUQV57XY5VXSBWAVN/ Code of Conduct: http://python.org/psf/codeofconduct/
