在Lua Code中註冊C/C++的枚舉很easy,就像註冊全局變量一樣。我們使用枚舉名稱作為命名空間,來避免註冊的枚舉發生沖突。註冊的枚舉存儲在全局環境(線程環境)中。

當在Lua Code中訪問枚舉時,通過名稱來訪問相應的值。

sample_9.cpp c++代碼例如以下：

//在Lua Code中註冊的enum,為了避免沖突,以名稱作為enumTable來存儲
enum Week
{
	Monday,
	Tuesday,
	Wednesday,
	Thursday,
	Friday,
	Saturday,
	Sunday,
};
//定義宏用來方便使用設置鍵值
#define LUA_ENUM(L, val)   lua_pushliteral(L, #val);   lua_pushnumber(L, val);   lua_settable(L, -3)


void register_enum(lua_State* L)
{   //創建一個enumTable,用於存儲Enum的全部枚舉。通過枚舉名稱=枚舉值
	lua_newtable(L);
	//設置 enumTable["Monday"]=Monday
	LUA_ENUM(L, Monday);
	LUA_ENUM(L, Tuesday);
	LUA_ENUM(L, Wednesday);
	LUA_ENUM(L, Thursday);
	LUA_ENUM(L, Friday);
	LUA_ENUM(L, Saturday);
	LUA_ENUM(L, Sunday);
	//把enumTable存在在_G 全局環境(線程環境)中,以枚舉名稱作為鍵
	lua_setglobal(L,"Week");
}
int main(int argc, char *argv[])
{
	lua_State* L = lua_open();
	luaL_openlibs(L);
	register_enum(L);
	luaL_dofile(L, "sample_9.lua");
    lua_close(L);
    return 0;
}

local Week=_G["Week"]
print(Week)
print(Week.Monday)
print(Week.Tuesday)
print(Week.Wednesday)
print(Week.Thursday)
print(Week.Friday)
print(Week.Saturday)
print(Week.Sunday)

Lua 與C/C++ 交互系列:註冊枚舉enum到Lua Code中