diff options
| -rw-r--r-- | libstdc++-v3/include/std/type_traits | 25 |
1 files changed, 13 insertions, 12 deletions
diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index e19d964..e4d1679 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -286,18 +286,6 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION >::type __is_complete_or_unbounded(_TypeIdentity) { return {}; } - // For several sfinae-friendly trait implementations we transport both the - // result information (as the member type) and the failure information (no - // member type). This is very similar to std::enable_if, but we cannot use - // them, because we need to derive from them as an implementation detail. - - template<typename _Tp> - struct __success_type - { typedef _Tp type; }; - - struct __failure_type - { }; - // __remove_cv_t (std::remove_cv_t for C++11). template<typename _Tp> using __remove_cv_t = typename remove_cv<_Tp>::type; @@ -2162,6 +2150,19 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION // Sfinae-friendly common_type implementation: /// @cond undocumented + + // For several sfinae-friendly trait implementations we transport both the + // result information (as the member type) and the failure information (no + // member type). This is very similar to std::enable_if, but we cannot use + // that, because we need to derive from them as an implementation detail. + + template<typename _Tp> + struct __success_type + { typedef _Tp type; }; + + struct __failure_type + { }; + struct __do_common_type_impl { template<typename _Tp, typename _Up> |