c++调用lua注册的带参数的回调

main.cpp

int lua_cb = LUA_REFNIL;
int lua_cb_arg = LUA_REFNIL;
int setcb(lua_State *L)
{
    lua_pushvalue(L, -2);
    lua_callback = luaL_ref(L, LUA_REGISTRYINDEX);
    lua_pushvalue(L, -1);
    lua_cb_arg = luaL_ref(L, LUA_REGISTRYINDEX);
    return 0;
}

int main()
{
    lua_State* L = luaL_newstate();
    top = lua_gettop(L);
    luaopen_base(L);
    luaL_openlibs(L);

    //注册回调
    lua_register(L, "setcb", setcb);

    int ret = luaL_dofile(L, "test.lua");
    if(ret != 0)
    {
        printf("%s", lua_tostring(L, -1));
    }

    //调用回调
    lua_rawgeti(L, LUA_REGISTRYINDEX, lua_cb );
    lua_rawgeti(L, LUA_REGISTRYINDEX, lua_cb_arg);
    lua_call(L, 1, 0);

    lua_close(L);

    getchar();
    return 1;
}

test.lua

local cb_arg = {a=1};
setcb(function(_arg) 
    print("cb' s arg is a table, arg.a=" .. _arg["a"]);
end, cb_arg);