generator functions in another language

[castironpi at gmail.com]

On May 4, 12:21 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Sun, 04 May 2008 01:08:34 -0300, Marc 'BlackJack' Rintsch <bj_... at gmx.net> escribió:
>
> > On Sat, 03 May 2008 16:39:43 -0700, castironpi wrote:
>
> >> I'm actually curious if there's a way to write a generator function
> >> (not a generator expression) in C, or what the simplest way to do it
> >> is... besides link the Python run-time.
>
> > The reference implementation of Python is written in C, so obviously there
> > must be a way to write something like generators in C.
>
> Yes and no. Generators are tied to frames, and frames execute Python code, not C. There is no simple way to write generators in C, but there are some generator-like examples in the itertools module.
> See this threadhttp://groups.google.com/group/comp.lang.python/browse_thread/thread/...
>
> --
> Gabriel Genellina

Gabriel,
How did your attempt turn out from last May?  At first look, it's
outside the scope of Python, but it is not the scope of C
necessarily.  Generators offer a lot of simplicity (which I haven't
read about extensively, but am starting to see) that could gain some
reputation for Python.  What is the midpoint at which C could meet
Python?

There is no such thing as a 'frame' per se in C; byte code is
integral.  As there is no such thing as suspended state without
frames, and no such thing as generators without suspended state.  It's
a hard thing to Google for without knowing the prior terminology for
the work that's already been done on them in C.  What work is there?
Are any devs interested in pursuing it?

The frame implementation.

http://svn.python.org/projects/python/trunk/Include/frameobject.h
http://svn.python.org/projects/python/trunk/Objects/frameobject.c

The generator code.

http://svn.python.org/projects/python/trunk/Include/genobject.h
http://svn.python.org/projects/python/trunk/Objects/genobject.c

I used Microsoft's search engine (python frame generator
site:svn.python.org , links 3 and 5) to find it.