LessThanComparableWith.h

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#pragma once

#include <scl/tools/meta/is_convertible.h>

namespace scl{
    namespace concepts{
        template <class T, class U>
        struct LessThanComparableWith{
            constexpr operator bool() const{
                using namespace scl::tools;
                static_assert(meta::is_convertible<
                    decltype(std::declval<T>() < std::declval<U>()),
                    bool
                >(), "LessThanComparableWith<T, U>: There is no operator< that compares a T and a U.");
                return true;
            }
        };
    }
}