diff options
Diffstat (limited to 'libstdc++-v3/include/bits/cpp_type_traits.h')
| -rw-r--r-- | libstdc++-v3/include/bits/cpp_type_traits.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/libstdc++-v3/include/bits/cpp_type_traits.h b/libstdc++-v3/include/bits/cpp_type_traits.h index f02caab0311..5ac9c98e704 100644 --- a/libstdc++-v3/include/bits/cpp_type_traits.h +++ b/libstdc++-v3/include/bits/cpp_type_traits.h @@ -364,6 +364,26 @@ namespace std }; }; + // + // A stripped-down version of std::tr1::is_empty + // + template<typename _Tp> + struct __is_empty + { + private: + template<typename> + struct __first { }; + template<typename _Up> + struct __second + : public _Up { }; + + public: + enum + { + __value = sizeof(__first<_Tp>) == sizeof(__second<_Tp>) + }; + }; + } // namespace std #endif //_CPP_TYPE_TRAITS_H |