ENH: np.finfo support for Numpy User DTypes #27231
Description
Proposed new feature or change:
Require the support for integrating User DTypes with numpy.finfo as currently it raises the ValueError
In [2]: np.finfo(QuadPrecDType)
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
Cell In[2], line 1
----> 1 np.finfo(QuadPrecDType)
File ~/Desktop/numpy-user-dtypes/quaddtype/.venv/lib/python3.11/site-packages/numpy/_core/getlimits.py:519, in finfo.__new__(cls, dtype)
517 dtype = newdtype
518 if not issubclass(dtype, numeric.inexact):
--> 519 raise ValueError("data type %r not inexact" % (dtype))
520 obj = cls._finfo_cache.get(dtype)
521 if obj is not None:
ValueError: data type <class 'numpy.object_'> not inexact