[Python-Dev] Proper tail recursion

[Chris King]

On Mon, 19 Jul 2004 13:06:59 -0400, Phillip J. Eby
<pje at telecommunity.com> wrote:
> At 12:27 PM 7/19/04 -0400, Chris King wrote:
> >Given the proposed changes:
> >
> >1) make a seperate eval loop that supports tail calls so as not to
> >impact performance of normal programs,
> 
> Um, no.  Please look at ceval.c before you even consider proposing
> something like that, and then be sure to have a proposal for how you'd
> *maintain* this second eval loop.

I've spent a good deal of time in ceval.c implementing my previous
proposal, and an #include and some #defines should do the trick. 
Result: only one function to maintain, living in a seperate file. 
Yes, I realize that's a roundabout way of doing stuff, but even
projects as closely related to Python as numarray use much more
drastic measures to automate code duplication (hint: the C
preprocessor wasn't enough for numarray).