prot_flag.hpp

#pragma once
 
#include <cstdint>
#include <type_traits>
 
namespace plugify {
    enum ProtFlag {
        UNSET = 0, 
        X = 1 << 1, 
        R = 1 << 2, 
        W = 1 << 3, 
        S = 1 << 4, 
        P = 1 << 5, 
        N = 1 << 6, 
        RWX = R | W | X 
    };
 
    inline ProtFlag operator|(ProtFlag lhs, ProtFlag rhs) noexcept {
        using underlying = typename std::underlying_type<ProtFlag>::type;
        return static_cast<ProtFlag> (
                static_cast<underlying>(lhs) | static_cast<underlying>(rhs)
        );
    }
 
    inline bool operator&(ProtFlag lhs, ProtFlag rhs) noexcept {
        using underlying = typename std::underlying_type<ProtFlag>::type;
        return static_cast<underlying>(lhs) & static_cast<underlying>(rhs);
    }
 
    inline ProtFlag& operator|=(ProtFlag& lhs, ProtFlag rhs) noexcept {
        lhs = lhs | rhs;
        return lhs;
    }
} // namespace plugify