label.hpp

 
#ifndef UFO_CORE_LABEL_HPP
#define UFO_CORE_LABEL_HPP
 
// STL
#include <cstdint>
#include <format>
#include <ostream>
 
namespace ufo
{
struct Label {
    using value_type = std::uint32_t;
 
    value_type label{};
 
    [[nodiscard]] constexpr operator value_type() const noexcept { return label; }
 
    [[nodiscard]] friend constexpr auto operator<=>(Label lhs,
                                                    Label rhs) noexcept = default;
 
    [[nodiscard]] friend constexpr bool operator==(Label lhs, Label rhs) noexcept = default;
};
 
inline std::ostream& operator<<(std::ostream& out, Label l) { return out << l.label; }
}  // namespace ufo
 
template <>
struct std::formatter<ufo::Label> : std::formatter<ufo::Label::value_type> {
    auto format(ufo::Label l, std::format_context& ctx) const
    {
        return std::formatter<ufo::Label::value_type>::format(l.label, ctx);
    }
};
#endif  // UFO_CORE_LABEL_HPP