[Python-Dev] cpython (3.6): replace usage of Py_VA_COPY with the (C99) standard va_copy

[Benjamin Peterson]

On Fri, Sep 23, 2016, at 00:04, Victor Stinner wrote:
> 2016-09-23 8:47 GMT+02:00 Benjamin Peterson <benjamin at python.org>:
> > I'm being flippant here because of the triviality of the change. Anyone
> > using Py_VA_COPY or Py_MEMCPY can fix their code in a backwards and
> > forwards compatible manner in 7 seconds with a sed command.
> 
> Python 3 had the same argument with 2to3: run 2to3 once, and you are
> done. C99 is a new thing for Python >= 3.6, but when you want to
> support Python 2.7 and 3.5, you are stuck at Visual Studio 2010 which
> is less happy with C99 than VS 2015...

Python 2.7 doesn't provide Py_VA_COPY, so using it wouldn't do you much
good anyway in term of Python 2/3 compatibility.

This is not like 2to3 because the automatic transform is correct in all
cases.