Re: luaL_ref() on a string

[Peter Cawley <lua@...>]

2010/4/12 Andreas Falkenhahn <andreas@airsoftsoftwair.de>:
> when I use luaL_ref() on a string that is on top of the stack, and then obtain a pointer
> to this string. Is this pointer guaranteed to be valid until I call luaL_unref() or could
> the string be moved to an other memory location across function calls?

In practice, pointers to strings will remain valid for as long as
there is a reference to the string (e.g. by putting it in a table or
stack). If you follow the reference manual strictly, then pointers to
strings are only guaranteed to be valid for as long as the string is
on the stack. While not explicitly stated, userdata pointers will
remain valid for as long as there is a reference to the userdata, as
moving them could mess things up.