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Re: [Patch] [libstdc++] [constexpr] use macros in place of 'constexpr' to allow for disabling constexpr until fully supported by compiler

From: Paolo Carlini <paolo dot carlini at oracle dot com>
To: dev dot lists at jessamine dot co dot uk
Cc: Jonathan Wakely <jwakely dot gcc at gmail dot com>, libstdc++ <libstdc++ at gcc dot gnu dot org>, Marc Glisse <marc dot glisse at inria dot fr>, gcc-patches at gcc dot gnu dot org, Jason Merrill <jason at redhat dot com>
Date: Thu, 17 Feb 2011 23:37:09 +0100
Subject: Re: [Patch] [libstdc++] [constexpr] use macros in place of 'constexpr' to allow for disabling constexpr until fully supported by compiler
References: <3f47a1ba92b11724c7daafd3f4c15e75.squirrel@webmail.plus.net> <4D5D48A9.7020001@oracle.com> <AANLkTimP6W8r6DmZ_DnpcJCKH_yKNKvw8aYkOWGF1r+z@mail.gmail.com> <alpine.DEB.2.02.1102171958290.2488@laptop-mg.saclay.inria.fr> <AANLkTin8hZGZgvX0mZDxtJAaievKKphUaeKxvnhoRTX_@mail.gmail.com> <alpine.DEB.2.02.1102172114060.3089@laptop-mg.saclay.inria.fr> <AANLkTi=0kcewhTHiHbYRHBpU73MexsL8d=EHzgD1P6WH@mail.gmail.com> <e51001e3246817f039293066639020a4.squirrel@webmail.plus.net>

Hi,
> It is a moot point but I think in the case of constexpr vs static const
> this should be okay as differences could safely be translation unit
> specific.  It should work as if one unit was built in C++03 mode and one
> in C++0x which is supported by libstdc++ I think --
>   
It is not, really. It may work in some special cases but in general we
don't provide any such guarantee. Beware ;)

Paolo.

References:
- Re: [Patch] [libstdc++] [constexpr] use macros in place of 'constexpr' to allow for disabling constexpr until fully supported by compiler
  - From: Paolo Carlini
- Re: [Patch] [libstdc++] [constexpr] use macros in place of 'constexpr' to allow for disabling constexpr until fully supported by compiler
  - From: Jonathan Wakely
- Re: [Patch] [libstdc++] [constexpr] use macros in place of 'constexpr' to allow for disabling constexpr until fully supported by compiler
  - From: Marc Glisse
- Re: [Patch] [libstdc++] [constexpr] use macros in place of 'constexpr' to allow for disabling constexpr until fully supported by compiler
  - From: Jonathan Wakely
- Re: [Patch] [libstdc++] [constexpr] use macros in place of 'constexpr' to allow for disabling constexpr until fully supported by compiler
  - From: Marc Glisse
- Re: [Patch] [libstdc++] [constexpr] use macros in place of 'constexpr' to allow for disabling constexpr until fully supported by compiler
  - From: Jonathan Wakely
- Re: [Patch] [libstdc++] [constexpr] use macros in place of 'constexpr' to allow for disabling constexpr until fully supported by compiler
  - From: Adam Butcher

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