On Wed, 10 May 2017 20:53:31 +0200 Michał Górny <mgo...@gentoo.org> wrote:
> Allow two special values in the implementation patterns for > _python_impl_matches(): -2 to indicate all Python 2-compatible > implementations, and -3 to indicate all Python 3-compatible > implementations. Both of those values are implemented using > the python_is_python3 function. Seems mostly reasonable, though the syntax is somewhat confusing at first glance. There are many places where we use "-value" to negate, so this looks like it means "not python 2" rather than "all python 2". Perhaps something like '+2' would make it easier to read. > This is mostly meant to make it easier and more fool-proof to write > dependencies on backports to Python 2 which in most cases apply to > PyPy2 as well.
