HelenOS sources

is_assignable     662 uspace/lib/cpp/include/__bits/type_traits/type_traits.hpp     struct is_assignable: false_type
is_assignable     666 uspace/lib/cpp/include/__bits/type_traits/type_traits.hpp     struct is_assignable<T, U, void_t<decltype(declval<T>() = declval<U>())>>