#include <locale>
#include <type_traits>
#include <cassert>
int main()
{
std::locale l = std::locale::classic();
{
assert(std::has_facet<std::ctype<char> >(l));
const std::ctype<char>& f = std::use_facet<std::ctype<char> >(l);
{
(void)std::ctype<char>::id;
}
static_assert((std::is_same<std::ctype<char>::char_type, char>::value), "");
static_assert((std::is_base_of<std::ctype_base, std::ctype<char> >::value), "");
static_assert((std::is_base_of<std::locale::facet, std::ctype<char> >::value), "");
}
}