[Cython] Automatic conversion with fixed-size C arrays

[Kurt Smith]

On Thu, Jul 24, 2014 at 9:13 PM, Kurt Smith <kwmsmith at gmail.com> wrote:

>
> I'm working on getting the `to_py_function` and `from_py_function`
> infrastructure to take arguments by reference; right now I'm getting
> something hacked into place, and I'd appreciate your review to point out
> the right way (or at least a better way) to do it.
>
> Will likely have a PR for you by this weekend.
>

Update: all the pieces are coming together.  I have sorted out all the code
generation pieces and nearly have a minimal example working, and will have
something for you to review soon.  From what I can tell, Cython has some
baked-in assumptions when it comes to assignment statements.  Telling
Cython that in this case, no, don't assign to something at the C level,
instead generate a function call and pass in the lvalue by reference takes
some doing.

I tried to fit things in with Cython's type system and pipelines, but I
have no doubt that it can be improved to do things the right way.
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