The enable_packrat type annotation prevents passing None for cache_size_limit #498
Description
The method enable_packrat has a type annotation for cache_size_limit: int, as well as a default value of 128:
Line 1082 in d5aafc3
However, the method's docstring and implementation indicate that passing None will lead to an unbounded cache:
Lines 1119 to 1120 in d5aafc3
In a downstream project, we'd like to be able to pass None, and also use a typechecker to check our project. Currently, this doesn't seems possible. For example, mypy will say:
pydevicetree/source/grammar.py:23: error: Argument 1 to "enable_packrat" of "ParserElement" has incompatible type "int | None"; expected "int" [arg-type]
It seems like a simple update to the type annotation of enable_packrat. I'm happy to send a PR for that.