Re: noob - How to architect c++ code to use lua as external code

[Kevin Martin <kev82@...>]

On 22 Oct 2012, at 18:51, Coda Highland wrote:

> Why use something as clumsy as a UUID for the key when you get a
> unique ID back from luaL_ref?

How can I use luaL_ref? I'm thinking to have a static function such as:

static int foo(lua_State *l) {
    lua_pushstring(l, "special key");
    lua_gettable(l, LUA_REGISTRYINDEX);
    SomeObject *o = lua_touserdata(l, -1);

    o->bar();

    return 0;
}

foo needs to know at compile time where to look to get the object (as there is no runtime data passed to foo), the returned value from luaL_ref is not known until runtime.

Thanks,
Kev