std::make_unsigned

template< class T >
struct make_unsigned;

If T is an integral (except bool) or enumeration type, provides the member typedef type which is the unsigned integer type corresponding to T, with the same cv-qualifiers.

If T is signed or unsigned char, short, int, long, longlong; the unsigned type from this list corresponding to T is provided.

If T is an enumeration type or char, wchar_t, char8_t(since C++20), char16_t, char32_t; the unsigned integer type with the smallest rank having the same sizeof as T is provided.

If the program adds specializations for std::make_unsigned, the behavior is undefined.

Member types

Helper types

template< class T >
using make_unsigned_t = typename make_unsigned<T>::type;

Example

#include <type_traits>

int main()
{
    using uchar_type = std::make_unsigned_t<char>;
    using uint_type  = std::make_unsigned_t<int>;
    using ulong_type = std::make_unsigned_t<volatile long>;
    
    static_assert(
        std::is_same_v<uchar_type, unsigned char> and
        std::is_same_v<uint_type, unsigned int> and
        std::is_same_v<ulong_type, volatile unsigned long>
    );
}

See also