https://bugs.kde.org/show_bug.cgi?id=434150
--- Comment #5 from Jonathan Wakely <zi...@kayari.org> ---
Maybe you meant to use typename A::value_type not typename T::value_type, but
it still wouldn't work.
This would be better:
template<typename A, typename R =
decltype(declval<A&>().push_back(std::declval<typename A::value_type>()))>
static constexpr bool test(A *pointer) {
return is_container<A>::value && std::is_same<R, void>::value;
}
You could also use std::is_void<R>::value instead of is_same.
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