[cfe-dev] Keyword warnings in libc++'s type_traits and other headers

Howard Hinnant howard.hinnant at gmail.com
Mon Dec 23 20:40:13 PST 2013

On Dec 23, 2013, at 8:28 PM, Alp Toker <alp at nuanti.com> wrote:

> This would still conflict with the keyword in current clang versions and other compilers that don't have a quality __has_feature() implementation.
> To reiterate, you'll do well to avoid the __is_* prefix entirely regardless of whether you can feature-test for individual availability of the keywords.

Hi Alp.  libc++ was using __is_void first.  clang needs to avoid stepping on existing identifiers too.  Get a __has_feature going and we're happy to meet you half way.  Neither clang nor libc++ has full ownership of the __namespace.  We have to share it.  It would be just as silly for us to be telling you to avoid this space because we're likely to step on you in the future.


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