[Development] RFC: handling of C++ feature test macros

[Thiago Macieira]

On Thursday, 19 September 2019 06:23:26 PDT Giuseppe D'Angelo via Development 
wrote:
> On 18/09/2019 01:37, Thiago Macieira wrote:
> > Marc's proposal is that we should accept that these things are rare and
> > simply correct when they do happen. Since our code is tested with the
> > currently latest versions of all compilers, we're fairly sure that any
> > such macro works with the compilers that currently support the feature.
> 
> This is not entirely accurate, we don't have configurations in the CI
> that use /std:c++latest or similar flags. It's basically saying "our
> users will find out". But as I said it's really paranoid at the moment.

We don't test /std:c++latest because it's a bit unstable for us. Whoever uses 
that gets to fix issues.

But we did test -std=c++1z before C++17 because for GCC and Clang those were 
actually ok.

-- 
Thiago Macieira - thiago.macieira (AT) intel.com
  Software Architect - Intel System Software Products