requires.hpp

#ifndef RTG_GUARD_RTGLIB_REQUIRES_HPP
#define RTG_GUARD_RTGLIB_REQUIRES_HPP

#include <type_traits>

namespace rtg {

template <bool... Bs>
struct and_ : std::is_same<and_<Bs...>, and_<(Bs || true)...>>
{
};

#define RTG_REQUIRES(...) class = typename std::enable_if<and_<__VA_ARGS__, true>{}>::type

} // namespace rtg

#endif