Re: Lua <-> C++ integration with "unused" stack slots

[Joshua Jensen <jjensen@...>]

----- Original Message -----
From: Oliver Schmidt
Date: 2/4/2010 4:15 PM
> On Thursday 04 February 2010, Philipp Janda wrote:
>    
> > Why are you doing that? You don't get deterministic cleanup of Lua
> > values anyway, and IIRC, the stack slots are removed when the function
> > returns.
> >      
> But if the C++ function does not return soon? If the C++ function does use a
> lot of (temporary) C++ objects representing Lua variables (e.g. inside
> a C++ loop body) and does call other C++ functions that are also using slots
> on the stack, the stack might get full of unused stack slots.
>    
LuaPlus (http://luaplus.org) lets you hold onto a Lua object within a 
C++ object:

LuaObject myDataObj = state->GetGlobal("MyData");
LuaObject valueObj = myDataObj["Value"];

The Lua data is stored within the LuaObject itself and does not need the 
Lua stack.

Josh