Re: [stack] QuoteAndEval

So IIUC applying the idea to a concatenative language like Cat:

   [is_weekend ["happy'] ["sad"] if] ` apply

Will generate different code depending on the day of week it is compiled.

Neat!

- Christopher

On Tue, May 13, 2008 at 4:35 PM, John Cowan <[email protected]> wrote:
>
>
>
>
> Manfred Von Thun scripsit:
>
>
> > The beauty of the various Unix utilities is that you can pipe the output
> > of one to become the input to the next. The backquote substitution
> > can make good use of it.
>
> Backquotes -- as is clearly shown by the alternative syntax $(...) --
> essentially belong to the lexical level of the shell, just like $name
> substitution. So they are very like Lisp macros: code inside backquotes
> runs in a subshell to produce *source code* which is then evaluated by
> the main shell in context, just as a Lisp macro runs in an subordinate
> evaluator to generate Lisp code to be run by the main evaluator in
> context.
>
> --
> What has four pairs of pants, lives John Cowan
> in Philadelphia, and it never rains http://www.ccil.org/~cowan
> but it pours? [email protected]
> --Rufus T. Firefly
>
>
>