std:: 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 , long long ; 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

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