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#ifndef AL_BYTE_H
#define AL_BYTE_H
#include <cstddef>
#include <cstdint>
#include <limits>
#include <type_traits>
using uint = unsigned int;
namespace al {
/* The "canonical" way to store raw byte data. Like C++17's std::byte, it's not
* treated as a character type and does not work with arithmatic ops. Only
* bitwise ops are allowed.
*/
enum class byte : unsigned char { };
template<typename T>
constexpr std::enable_if_t<std::is_integral<T>::value,T>
to_integer(al::byte b) noexcept { return T(b); }
template<typename T>
constexpr std::enable_if_t<std::is_integral<T>::value,al::byte>
operator<<(al::byte lhs, T rhs) noexcept { return al::byte(to_integer<uint>(lhs) << rhs); }
template<typename T>
constexpr std::enable_if_t<std::is_integral<T>::value,al::byte>
operator>>(al::byte lhs, T rhs) noexcept { return al::byte(to_integer<uint>(lhs) >> rhs); }
template<typename T>
constexpr std::enable_if_t<std::is_integral<T>::value,al::byte&>
operator<<=(al::byte &lhs, T rhs) noexcept { lhs = lhs << rhs; return lhs; }
template<typename T>
constexpr std::enable_if_t<std::is_integral<T>::value,al::byte&>
operator>>=(al::byte &lhs, T rhs) noexcept { lhs = lhs >> rhs; return lhs; }
#define AL_DECL_OP(op, opeq) \
template<typename T> \
constexpr std::enable_if_t<std::is_integral<T>::value,al::byte> \
operator op (al::byte lhs, T rhs) noexcept \
{ return al::byte(to_integer<uint>(lhs) op static_cast<uint>(rhs)); } \
\
template<typename T> \
constexpr std::enable_if_t<std::is_integral<T>::value,al::byte&> \
operator opeq (al::byte &lhs, T rhs) noexcept { lhs = lhs op rhs; return lhs; } \
\
constexpr al::byte operator op (al::byte lhs, al::byte rhs) noexcept \
{ return al::byte(lhs op to_integer<uint>(rhs)); } \
\
constexpr al::byte& operator opeq (al::byte &lhs, al::byte rhs) noexcept \
{ lhs = lhs op rhs; return lhs; }
AL_DECL_OP(|, |=)
AL_DECL_OP(&, &=)
AL_DECL_OP(^, ^=)
#undef AL_DECL_OP
constexpr al::byte operator~(al::byte b) noexcept
{ return al::byte(~to_integer<uint>(b)); }
} // namespace al
#endif /* AL_BYTE_H */
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