Chris Colbert wrote:
> Hey all,
> 
> When coding for the scikits.image project, we are making extensive use 
> of Cython. It would be nice to have algorithms that work on multiple 
> datatypes (numpy dtypes) without having to hand code everything. So, 
> i've been toying around with how a simple templating syntax might look. 
> 
> I've thrown this up on pastebin:
> 
> http://pastebin.com/f1a49143d
> 
> I would think (but really i have no idea) that this would be possible to 
> have Cython do during cythonization. But I could implement a templating 
> script that does it, just as proof of concept. 
> 
> What do you all think of that?

I'm happy for any effort done in the area in general. But I'm kind of 
lukewarm to actually having your proposal into Cython as it stands. In 
my mind there's two seperate concepts.

1) String-based templating
2) Proper language templates

2) has been discussed pretty much in the past and is something we really 
want to have in Cython. However it is something closer to C++ templates 
or Java generics and would look quite different from the syntax you propose.

Your syntax is good for string-based templating (which is what you seem 
to propose), however for that I think it is just as well to use a proper 
templating engine and not couple Cython into it at all. I.e. write the 
files using e.g. proper Cheetah templates, then use a script to turn it 
into pyx (i.e. what you propose, but without the prospect of building it 
into Cython, and without (re)inventing yet another templating language).

What really lacks is Cython support for a decent build system -- making 
a convention that the ".tpyx" suffix means "run Cheetah on it, then 
Cython, then gcc" should be a ten-liner, not a huge and impossible 
battle with distutils.

-- 
Dag Sverre
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