- using nothrow_ = ::std::integral_constant< \
- bool, \
- noexcept(::std::declval<F>().membername(::std::declval<Args>()...))>; \
+ struct nothrow_ : std::integral_constant< \
+ bool, \
+ noexcept(::std::declval<F>().membername( \
+ ::std::declval<Args>()...))> {}; \