ENH: Add a mypy plugin for inferring the precision of np.ctypeslib.c_intp
#19062
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Follow up on #19029.
This PR updates numpy's mypy plugin such that it can assign the platform-specific precision of
np.ctypeslib.c_intp
,the latter taking one of the following three values:
ctypes.c_int
,ctypes.c_long
orctypes.c_longlong
.Without the plugin
c_intp
will default toctypes.c_int64
, which should be the correct type in most cases (i.e. on 64-bit platforms).