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Re: [PATCH. libstdc++] Use the correct C++14 __cplusplus value (201402L). Added C++1z to the preprocessor.
- From: Rainer Orth <ro at CeBiTec dot Uni-Bielefeld dot DE>
- To: Paolo Carlini <paolo dot carlini at oracle dot com>
- Cc: Ed Smith-Rowland <3dw4rd at verizon dot net>, "libstdc++\ at gcc dot gnu dot org" <libstdc++ at gcc dot gnu dot org>, gcc-patches <gcc-patches at gcc dot gnu dot org>
- Date: Tue, 26 Aug 2014 10:42:10 +0200
- Subject: Re: [PATCH. libstdc++] Use the correct C++14 __cplusplus value (201402L). Added C++1z to the preprocessor.
- Authentication-results: sourceware.org; auth=none
- References: <53F91799 dot 2070902 at verizon dot net> <53FC4524 dot 9090606 at oracle dot com>
Paolo Carlini <paolo.carlini@oracle.com> writes:
> Hi,
>
> On 08/24/2014 12:37 AM, Ed Smith-Rowland wrote:
>> With revision 214400 we have the C++14 value of __cplusplus set to the
>> correct value of 201402L (from 201300L).
> It occurs to me: instead of having to remember every time those numbers,
> couldn't we predefine, for example:
>
> __cplusplus_98
> __cplusplus_11
> __cplusplus_14
>
> with the correct values of course?!?
But won't this lead to portability trouble in the future when people see
those macros and start using them in their own code, breaking
compilation with older or non-g++ compilers?
Rainer
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Rainer Orth, Center for Biotechnology, Bielefeld University