set_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_SET_SIGNEDNESS_H)
#define CNL_IMPL_NUMBERS_SET_SIGNEDNESS_H
 
#include "../config.h"
#include "../cstdint/types.h"
 
#include <concepts>
#include <type_traits>
 
namespace cnl::numbers {
    template<class T, bool IsSigned>
    struct set_signedness;
 
    template<typename T>
    requires(std::is_integral_v<T>) struct set_signedness<T, false>
        : std::make_unsigned<T> {
    };
    template<typename T>
    requires(std::is_integral_v<T>) struct set_signedness<T, true>
        : std::make_signed<T> {
    };
 
    template<class T, bool IsSigned>
    using set_signedness_t = typename set_signedness<T, IsSigned>::type;
}
 
#endif  // CNL_IMPL_NUMBERS_SET_SIGNEDNESS_H