Re: Eval a Lua expression

[Eugen-Andrei Gavriloaie <shiretu@...>]

On Apr 3, 2008, at 12:27 AM, Javier Guerra wrote:

> On Wed, Apr 2, 2008 at 4:12 PM, Eugen-Andrei Gavriloaie
> <shiretu@gmail.com> wrote:
> > So, on the second lua_evaluate_expression call from C++ I will have  
> > a value
> > of 2 instead of the string 'mysql' pushed on the stack because the  
> > entire
> > script execution stops at the first return. Am I right?
>
> no, each call to lua_evaluate_expression() would compile and execute a
> new script in the same context. it won't 'accumulate' a long script.
Hmmm, that is even worse unfortunately because I don't want to  
recompile the script over and over again. Some Lua variables may  
contain valuable informations and on the first call
of lua_evaluate_expression I will reset them. I'm talking about  
variables computed along the life of the lua_State like state  
variables for example. Further use of the lua_State will result in an
unknown behavior (some state variables,if any, will be lost). This  
would work great on config files written in Lua since they should  
contain only initialized variables (much like a database, or a file  
with key/value pairs). But when you have to deal with Lua scripts that  
needs to be executed and they must have some state variables defined  
in them, will be a disaster.

> --
> Javier
 Thank you