Guido,

On Thursday, January 16, 2014, Guido van Rossum <guido@python.org> wrote:
On Thu, Jan 16, 2014 at 11:15 AM, Yury Selivanov
<yselivanov.ml@gmail.com> wrote:
> The whole discussion of whether clinic should write its output
> right in the source file (buffered or not), or in a separate sidefile,
> started because we currently cannot run the clinic during the build
> process, since it’s written in python.

But that's why the output is checked in. It's the same with the parser
IIRC. (And yes, there's a bootstrap issue -- but that's solved by
using an older Python version.)

> But what if, at some point, someone implements the Tools/clinic.py in
> pure C, so that integrating it directly in the build process will be
> possible?  In this case, the question is — should we use python code
> in the argument clinic DSL?
>
> If we keep it strictly declarative, then, at least, we’ll have this
> possibility in the future.

Sounds like a pretty unlikely scenario. Why would you implement clinic in C?

Unlikely, yes.

There is just one reason for having it in C --
having it integrated in the build process,
so that the generated output/sidefiles 
are not in the repository.

Yury