Re: Script Reloading

[Tim Gogolin <tgogolin@...>]

On Aug 6, 2004, at 9:11 AM, John Paquin wrote:

> Have any of you guys dealt with the problem of using a class 
> inheritence structure and trying to reload scripts on the fly?
>
> We'd like to be a able to run our app (which would load some script 
> files), then be able to change the script files and reload them and 
> have the existing objects reflect the changed source.
>
> The problem, of course, is that we're using a class structure, and our 
> method tables point directly to the methods of the classes we've 
> inherited from.  When we reload the script, our references don't 
> change, there's simply a new version of the methods in the lua state 
> somewhere.
>
> One way to handle this would be to keep a list of the names of the 
> inherited classes for each class. Then when a method gets called, we'd 
> go through the list and get the inherited class definition from the 
> global table and try to find the method.  If it didn't exist, we move 
> on to the next name.
>
> youch.  It hurts just talking about doing it this way, but I'm 
> thinking that in reality, our class structure won't be very deep, so 
> lookups would be limited to 2 or 3 at most.
>
> Anyone else have any other brainy ideas?

Keep a weak keyed list of all Class instances and refresh their method 
tables after reloading a script?

-- Tim Gogolin