[Numpy-discussion] Removing datetime support for 1.4.x series ?
Tue Feb 2 23:59:56 CST 2010
Travis Oliphant wrote:
> On Feb 2, 2010, at 11:46 PM, David Cournapeau wrote:
>> On Wed, Feb 3, 2010 at 12:23 PM, David Cournapeau
>> <firstname.lastname@example.org <mailto:email@example.com>> wrote:
>>> Sorry, my question was badly worded: besides the metadata pointer, is
>>> there any other change related to the metadata infratructure which may
>>> potentially change changes the publicly exported structures ? I wonder
>>> whereas the metadata infrastructure can be kept in 1.4.x independently
>>> of the datetime support without breaking the ABI
>> FWIW, keeping the metadata pointer, and only removing datetime-related
>> things makes numpy 1.4.x backward compatible, at least as far as scipy
>> is concerned. So it seems the PyArray_Funcs change is the only
>> ABI-incompatible change.
> What do you mean by the "PyArray_Funcs change"?
The change that broke the ABI is in the PyArray_Funcs structure
Because NPY_NTYPES is bigger after the datetime change.
If there is a way to have the datetime not expanding NPY_NTYPES, then I
think we can keep the ABI. I tried something with datetimes considered
as user types, but did not go very far (most certainly because I have
never used this part of the code before).
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