Re: [Freeciv-Dev] Script implementation

[Jules Bean <jmlb2@xxxxxxxxxxxxxxxx>]

> Scripts will be mostly embedded into rulesets.
> 
> [building_hydro_plant]
> name        = "Hydro Plant"
> tech_req    = "Electronics"
> obsolete_by = "None"
> is_wonder   = 0
> build_cost  = 240
> upkeep      = 4
> can_build = SCRIPT guile
> (
> .. script
> )
> ENDSCRIPT
> 
> Normal parser will real ruleset, when it will spot script keyword in
> correct place, it passes stream/text to SVM.  As we may want to have few
> dialects translating to same VM, type of script is next - but this is
> resolved by SVM. Call will be something like

OK.  Let me interject here to say that this is a very different solution
from the one I am thinking about.  I'm *definitely* not actually
claiming that mine is superior - I can see many advantages to Artur's -
but I want to outline the alternative approach.  To emphasise that I
don't speak for the project, and that this is just a personal project of
mine, I will call it 'jules-freeciv' below :)

I will be completely (but gradually) removing the ruleset files.  There
will be no parser in jules-freeciv at all.  Instead, jules-freeciv will
load object files in my bytecode, and the object files will include
both  the data and the scripts - which I prefer to call code.

This is good, in the jules-freeciv doesn't need to have the hooks to be
a parser/compiler, but bad in that an external compiler is necessary, so
working with jules-freeciv rule-objects requires an extra compile step.

My VM was originally conceived for another game, and the goal was to
provide what is predominantly a data format (and OO data format), and
secondarily can include simple code for cases when constant data isn't
appropriate.

Jules

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