[Cython] Cython 0.29 – or 29.0 ?

[Robert Bradshaw]

On Sat, Aug 18, 2018 at 10:24 AM, Jeroen Demeyer <J.Demeyer at ugent.be> wrote:
> On 2018-08-17 11:44, Stefan Behnel wrote:
>>
>> Hej, that gives us an alternative for the versioning switch. We could
>> release Cython 3.0 when we change the default language level (and require
>> users to select "language_level=2" for legacy code). Definitely a breaking
>> change that merits inceasing the major version, and 3.0 seems very
>> suitable.
>
>
> One annoying point with language_level=3 is that all string literals become
> unicode (like from __future__ import unicode_literals). Unlike the other
> changes that language_level=3 makes, this is a major breaking change on
> Python 2.
>
> So I would very much prefer enabling everything that language_level=3 does,
> but keeping strings of type "str" on Python 2. Maybe you could invent a new
> option for that, say "language_level=3str"?

Do the existing c_string_type and c_string_encoding directives not
cover this usecase? I suppose what you're asking for is str being the
str of the runtime, even if language_level=3 is set.