bit_proxy_reference.h

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#pragma once
 
#include "di/types/prelude.h"
 
namespace di::bit::detail {
class BitProxyReference {
public:
    constexpr explicit BitProxyReference(u8* byte, u8 bit_offset) : m_byte(byte), m_bit_offset(bit_offset) {}
 
    constexpr BitProxyReference(BitProxyReference const&) = default;
    constexpr BitProxyReference(BitProxyReference&&) = default;
 
    constexpr auto operator=(bool value) const -> BitProxyReference const& {
        if (value) {
            *m_byte |= (1U << m_bit_offset);
        } else {
            *m_byte &= ~(1U << m_bit_offset);
        }
        return *this;
    }
 
    // NOLINTNEXTLINE(bugprone-unhandled-self-assignment)
    constexpr auto operator=(BitProxyReference const& other) const -> BitProxyReference const& {
        return *this = bool(other);
    }
 
    constexpr operator bool() const { return !!(*m_byte & (1U << m_bit_offset)); }
 
    constexpr auto operator~() const -> bool { return !bool(*this); }
 
    constexpr auto flip() const -> BitProxyReference const& {
        *m_byte ^= (1U << m_bit_offset);
        return *this;
    }
 
private:
    u8* m_byte;
    u8 m_bit_offset;
};
}