================ Comment at: include/__config:585-591 @@ +584,9 @@ +# endif +// Clang 3.0 and GCC 4.6 provide __decltype in all standard modes. +// XCode 5.0 is based off of Clang 3.3 SVN. We require Clang 3.3 +// be sure we have __decltype. +#if (defined(__apple_build_version__) && _CLANG_VER >= 500) || \ + (!defined(__apple_build_version__) && _CLANG_VER >= 303) || \ + _GNUC_VER >= 406 +# define decltype(__x) __decltype(__x) +#else ---------------- You can use `__is_identifier` for this. Clang's supported it since r206069 (version 3.5), which may be good enough? (How old a Clang release can still parse libc++?)
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