signedness.h

 
//          Copyright John McFarlane 2021.
// Distributed under the Boost Software License, Version 1.0.
//    (See accompanying file ../LICENSE_1_0.txt or copy at
//          http://www.boost.org/LICENSE_1_0.txt)
 
 
#if !defined(CNL_IMPL_NUMBERS_SIGNEDNESS_H)
#define CNL_IMPL_NUMBERS_SIGNEDNESS_H
 
#include "../config.h"
#include "../cstdint/types.h"
 
#include <concepts>
#include <type_traits>
 
namespace cnl::numbers {
    template<typename T>
    struct signedness;
 
    template<typename T>
    requires(std::is_integral_v<T>) struct signedness<T> : std::is_signed<T> {
    };
 
    template<typename T>
    requires(std::is_floating_point_v<T>) struct signedness<T> : std::true_type {
    };
 
    template<typename T>
    inline constexpr bool signedness_v = signedness<T>::value;
}
 
#endif  // CNL_IMPL_NUMBERS_SIGNEDNESS_H