[Freeciv-Dev] Re: using OR in requirements

[Jason Dorje Short <jdorje@xxxxxxxxxxxx>]

Vasco Alexandre da Silva Costa wrote:
> On 12/2/05, Per Inge Mathisen <per@xxxxxxxxxxx> wrote:
>
> > could we perhaps add two kinds of reqs, one for ANDs and one for ORs? Such
> > as one_of_req (or) and all_of_reqs (and), as in:
>
> Yes, we could. However, the current code is a bit of a mess. Helptext
> generation,
> duplication of negative reqs and nreqs, etc. I believe these issues should be
> fixed first before we extend it again, lest it turn into an unfixable mess.
> As for the suggestions to use Lua, this functionality seems, to me, to be
> performance sensitive enough to warrant a native C code implementation.
We cannot easily use Lua because the AI and helptext both require that 
the effects logic be invertible; e.g., it needs to know what it has to 
do to acquire an effect.  This would mean lots of lua functions for each 
effect - one for each query type, basically.
-jason