_flag_enum_operator_helpers.hh

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#ifndef __NCPP_FLAG_ENUM_OPERATOR_HELPERS_H
#define __NCPP_FLAG_ENUM_OPERATOR_HELPERS_H
 
#include <type_traits>
 
#include "_helpers.hh"
 
namespace ncpp
{
#define DECLARE_ENUM_FLAG_OPERATORS(__enum_name__)                      \
    NCPP_API_EXPORT constexpr __enum_name__ operator& (__enum_name__ x, __enum_name__ y) \
    { \
        typedef std::underlying_type<__enum_name__>::type etype; \
        return __enum_name__ (static_cast<etype> (x) & static_cast<etype> (y)); \
    } \
    NCPP_API_EXPORT constexpr __enum_name__& operator&= (__enum_name__& x, __enum_name__ y) \
    { \
        typedef std::underlying_type<__enum_name__>::type etype; \
        return x = __enum_name__ (static_cast<etype> (x) & static_cast<etype> (y)); \
    } \
    NCPP_API_EXPORT constexpr __enum_name__ operator| (__enum_name__ x, __enum_name__ y) \
    { \
        typedef std::underlying_type<__enum_name__>::type etype; \
        return __enum_name__ (static_cast<etype> (x) | static_cast<etype> (y)); \
    } \
    NCPP_API_EXPORT constexpr __enum_name__& operator|= (__enum_name__& x, __enum_name__ y) \
    { \
        typedef std::underlying_type<__enum_name__>::type etype; \
        return x = __enum_name__ (static_cast<etype> (x) | static_cast<etype> (y)); \
    } \
    NCPP_API_EXPORT constexpr __enum_name__ operator^ (__enum_name__ x, __enum_name__ y) \
    { \
        typedef std::underlying_type<__enum_name__>::type etype; \
        return __enum_name__ (static_cast<etype> (x) ^ static_cast<etype> (y)); \
    } \
    NCPP_API_EXPORT constexpr __enum_name__& operator^= (__enum_name__& x, __enum_name__ y) \
    { \
        typedef std::underlying_type<__enum_name__>::type etype; \
        return x = __enum_name__ (static_cast<etype> (x) ^ static_cast<etype> (y)); \
    } \
    NCPP_API_EXPORT constexpr __enum_name__& operator~ (__enum_name__& x) \
    { \
        typedef std::underlying_type<__enum_name__>::type etype; \
        return x = __enum_name__ (~static_cast<etype> (x)); \
    } \
    NCPP_API_EXPORT constexpr __enum_name__ operator~ (__enum_name__ x) \
    { \
        typedef std::underlying_type<__enum_name__>::type etype; \
        return __enum_name__ (~static_cast<etype> (x)); \
    }
}
#endif