Re: Tuples and other constant values

[Tim Hill <drtimhill@...>]

> On Jul 8, 2015, at 2:36 PM, Philipp Janda <siffiejoe@gmx.net> wrote:
> 
> Have you ever wondered why strings aren't implemented as userdata (given Lua's minimalistic nature)? Both are essentially sequences of bytes, after all.
> 
>> 
>> -Andrew
> 
> Philipp
> 

Different visibility. A userdata cannot be mutated by Lua code, only C code (the exception being it can be GCed, but even then C code can be informed of this via __gc). This allows a C library to offload storage of state to Lua but still be assured coherence of that state.

—Tim