bit_width.h

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#pragma once
 
#include "di/bit/operation/countl_zero.h"
 
namespace di::bit {
namespace detail {
    struct BitWidthFunction {
        template<concepts::UnsignedInteger T>
        constexpr auto operator()(T value) const -> T {
            return math::NumericLimits<T>::digits - countl_zero(value);
        }
    };
}
 
constexpr inline auto bit_width = detail::BitWidthFunction {};
}
 
namespace di {
using bit::bit_width;
}