[Python-Dev] Python API version & optional features

[Guido van Rossum]

> >> I guess one could argue that extension writers should check
> >> for narrow/wide builds in their extensions before using Unicode.
> >> 
> >> Since the number of Unicode extension writers is much smaller 
> >> than the number of users, I think that this apporach would be 
> >> reasonable, provided that we document the problem clearly in the 
> >> NEWS file.
> 
> > OK.  I approve.
> 
> I'm not sure I can follow. What did you approve? That extension
> writers should check whether their Unicode build matches the one they
> get at run-time? How are they going to do that?

With an explicit call.  They know their compile-time unicode width,
they can pass that to a function defined in the main Python/C API
which asserts that the argument is the same as *its* compile-time
unicode width.

--Guido van Rossum (home page: http://www.python.org/~guido/)