Function luaL_getmetafield

src/Chain/libraries/glua/lauxlib.cpp:2406–2419

LUALIB_API int luaL_getmetafield(lua_State *L, int obj, const char *event) {
    if (!lua_getmetatable(L, obj))  /* no metatable? */
        return LUA_TNIL;
    else {
        int tt;
        lua_pushstring(L, event);
        tt = lua_rawget(L, -2);
        if (tt == LUA_TNIL)  /* is metafield nil? */
            lua_pop(L, 2);  /* remove metatable and metafield */
        else
            lua_remove(L, -2);  /* remove only metatable */
        return tt;  /* return metafield type */
    }
}


LUALIB_API int luaL_callmeta(lua_State *L, int obj, const char *event) {