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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: Ada.Command_Line and wildcards
Newsgroups: comp.lang.ada
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Date: Fri, 9 Mar 2007 19:22:52 +0100
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Date: 2007-03-09T19:22:38+01:00
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On Fri, 09 Mar 2007 18:11:59 +0100, Markus E Leypold wrote:

> I wouldn't want to use Ada as an interactive command language.

Why not? I never could understand why anybody would need phyton to
configure Ada projects...

But "interactive command language" is nonsense in these days. There exist
far better ways of interaction with human beings than command languages.
They are a legacy of teleprinters.

> There
> are, I think, ways to get (1) type safety, (2) proper quoting without
> too much overhead. I, personally, would built a new generation shell
> system on, ahem, OCaml, because of the type interference and because
> functional composition might take the part pipes have played in the
> past. Something like
> 
>   dir "/etc/fstab" | dir_purge (fun f -> newer_than (2006,08,11) f.date ) | flatten | print dir_entry_long

Huh, but the above looks quite untyped. A properly typed object named
"fstab" would not need special "dir" to enumerate its members. Even less it
would need pipes to communicate its members to procedures. It already has
these members in it. And why do you construct a new set before printing, if
you have closures? The same old flawed UNIX ideology? (:-))

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de