[Cython] Buffer default options

[Stefan Behnel]

Hi,

Dag Sverre Seljebotn wrote:
> I'm thinking about letting the class author specify default buffer 
> options. Something like this:
> 
> cdef extern class Image ...:
>    __cythonbufferdefaults__ = {'ndim' : 2}
>    __cythonbuffermandatory__ = {'dtype': unsigned char, indirect=True}
>    __cythonbufferalways__ = True

I think default buffer options (mainly a default buffer layout) makes sense in
general. It's basically saying "when I return a buffer, it will look like this".

I wonder about the syntax, though. Wouldn't one special name + a couple of
keyword arguments be enough?

What about specifying it like this:

    cdef extern class Image ...:
        buffer[...buffer args...] __getbuffer__(...)

?

Stefan