Re: [stack] QuoteAndEval

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