[issue40114] support maxsize argument for lru_cache's user_function option

[Raymond Hettinger]

Raymond Hettinger <raymond.hettinger at gmail.com> added the comment:

Since the current signature allows *maxsize* and *typed* to be either positional or keyword arguments, we couldn't do this cleanly the way dataclasses did.  

The code in the PR is valiant attempt but is way too tricky for my tastes -- we would likely regret going down this path.

----------
nosy: +eric.smith

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40114>
_______________________________________