Re: variable command interpretter

[seba]

I agree??????????

-- 
Mark Un
c/o Mark William Sebastian Ban
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---- Evan Prodromou <address@hidden> wrote:
> >>>>> "PE" == Paul Emsley <address@hidden> writes:
> 
>     PE> Do I take it then that it can't be done today - but I
>     PE> should relax and let them choose python in the knowledge that
>     PE> sometime in the future I will be able drop python and link
>     PE> with guile and  python-> guile?
> 
> Two things, really quickly. First, if you really want to have custom
> syntax for your particular system, you should use Guile. Guile, like
> most Schemes, has a language extension mechanism, so you can actually
> make up new language primitives that will be more fit to your system.
> 
> For example, you might be able to define a syntax that does something
> like:
> 
>         (define-molecule water H-O-H) ; Does all the hard stuff
> 
>         (molecular-weight water) => 18 ; or whatever... uh.
>         (covalent-bonds water) => 2    ; again
>         (charge water) => 0
> 
>         (define-molecule stuff H=C-C=O-P) ; Over my head here B-)
> 
>         (mix-with stuff H+Cl-)
> 
>         (add NaCl H20) => (NaOH HCl)
>                 
> In this example, I used a format that chemists would actually
> understand more easily (I think -- not a chemist myself, obviously
> --
> roughly high-school level chem there) to define the molecule. Because
> Scheme lets you extend the language, the "define-molecule" macro I
> wrote there becomes a new part of your "chemistry language."
> 
> Second, why not start with Guile, and then let them use a
> Python-language compatibility module in the future? B-) Seriously,
> Python programmers tend to pick up lisp-like languages pretty easily.
> 
> ~ESP
> 
> -- 
> Evan Prodromou
> address@hidden
> 
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