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#ifndef flags_hh_INCLUDED
#define flags_hh_INCLUDED
#include <type_traits>
#include "meta.hh"
namespace Kakoune
{
template<typename Flags>
constexpr bool with_bit_ops(Meta::Type<Flags>) { return false; }
template<typename Flags>
concept WithBitOps = with_bit_ops(Meta::Type<Flags>{});
template<typename Flags>
using UnderlyingType = std::underlying_type_t<Flags>;
template<WithBitOps Flags>
constexpr Flags operator|(Flags lhs, Flags rhs)
{
return (Flags)((UnderlyingType<Flags>) lhs | (UnderlyingType<Flags>) rhs);
}
template<WithBitOps Flags>
constexpr Flags& operator|=(Flags& lhs, Flags rhs)
{
(UnderlyingType<Flags>&) lhs |= (UnderlyingType<Flags>) rhs;
return lhs;
}
template<typename Flags>
struct TestableFlags
{
Flags value;
constexpr operator bool() const { return (UnderlyingType<Flags>)value; }
constexpr operator Flags() const { return value; }
constexpr operator UnderlyingType<Flags>() const { return (UnderlyingType<Flags>)value; }
constexpr bool operator==(const TestableFlags<Flags>& other) const = default;
};
template<WithBitOps Flags>
constexpr TestableFlags<Flags> operator&(Flags lhs, Flags rhs)
{
return { (Flags)((UnderlyingType<Flags>) lhs & (UnderlyingType<Flags>) rhs) };
}
template<WithBitOps Flags>
constexpr Flags& operator&=(Flags& lhs, Flags rhs)
{
(UnderlyingType<Flags>&) lhs &= (UnderlyingType<Flags>) rhs;
return lhs;
}
template<WithBitOps Flags>
constexpr Flags operator~(Flags lhs)
{
return (Flags)(~(UnderlyingType<Flags>)lhs);
}
template<WithBitOps Flags>
constexpr Flags operator^(Flags lhs, Flags rhs)
{
return (Flags)((UnderlyingType<Flags>) lhs ^ (UnderlyingType<Flags>) rhs);
}
template<WithBitOps Flags>
constexpr Flags& operator^=(Flags& lhs, Flags rhs)
{
(UnderlyingType<Flags>&) lhs ^= (UnderlyingType<Flags>) rhs;
return lhs;
}
}
#endif // flags_hh_INCLUDED
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