#ifndef ENUM_FACTORY_H__
#define ENUM_FACTORY_H__

/*
Factory used example:
someEnum.h:
#include "enum_factory.h"
#define SOME_ENUM(XX) \
    XX(FirstValue,) \
    XX(SecondValue,) \
    XX(SomeOtherValue,=50) \
    XX(OneMoreValue,=100)

DECLARE_ENUM(SomeEnum,SOME_ENUM)

someEnum.cpp:
#include "someEnum.h"
DEFINE_ENUM(SomeEnum,SOME_ENUM)
*/

#include <string.h>
// expansion macro for enum value definition
#define ENUM_VALUE(name, assign) name assign,

// expansion macro for enum to string conversion
#define ENUM_CASE(name, assign)                                                \
    case name:                                                                 \
        return #name;

// expansion macro for string to enum conversion
#define ENUM_STRCMP(name, assign)                                              \
    if (!strcmp(str, #name))                                                   \
        return name;

/// declare the access function and define enum values
#define DECLARE_ENUM(EnumType, ENUM_DEF)                                       \
    enum EnumType { ENUM_DEF(ENUM_VALUE) };                                    \
    const char *GetString(EnumType dummy);                                     \
    EnumType Get##EnumType##Value(const char *string);

/// define the access function names
#define DEFINE_ENUM(EnumType, ENUM_DEF)                                        \
    const char *GetString(EnumType value) {                                    \
        switch (value) {                                                       \
            ENUM_DEF(ENUM_CASE)                                                \
        default:                                                               \
            return ""; /* handle input error */                                \
        }                                                                      \
    }                                                                          \
    EnumType Get##EnumType##Value(const char *str) {                           \
        ENUM_DEF(ENUM_STRCMP)                                                  \
        return (EnumType)0; /* handle input error */                           \
    }
#endif