From: Basile STARYNKEVITCH <basile@starynkevitch.net>
To: <flaig@hallucinogene.sanctacaris.net>, <flaig@hablas.com>
Cc: caml-list@inria.fr
Subject: [Caml-list] newbie questions
Date: Sat, 29 Mar 2003 10:15:47 +0100 [thread overview]
Message-ID: <16005.25667.709552.511315@hector.lesours> (raw)
In-Reply-To: <20030329084839.BAF874C99@sitemail.everyone.net>
>>>>> "Ruediger" == Dr Ruediger M Flaig <flaig@hablas.com> writes:
Ruediger> Good morning to all you bedouins out there :-) , as I am
Ruediger> a neophyte to CAML, forgive me if my questions have been
Ruediger> asked (and answered) a hundred times before...
You might have checked in the mailing list archive before asking...
Ruediger> 1.: Is there any means of doing list-type pattern
Ruediger> matching (style "| h::t -> ...") for recursion on
Ruediger> strings? [...]
unfortunately no. You cannot have pattern matching on strings.
But the Str module might help (it provides regular expressions).
See also recent postings on this issue:
http://caml.inria.fr/archives/200303/msg00289.html
http://caml.inria.fr/archives/200303/msg00399.html
Ruediger> 2.: A question on language design: why do recursive
Ruediger> functions have to be marked explicitly as such? [...]
Any (syntactically non-recursive) *expression* can appear on the right
hand side of let bindings, but this is not true for let rec bindings
which are restriced (syntactically) to functions and constant
constructors
see http://caml.inria.fr/ocaml/htmlman/manual015.html for more
(Historical note; many other languages require syntactic marking of
recursions: Scheme, Fortran90, PL1, ...)
--
Basile STARYNKEVITCH http://starynkevitch.net/Basile/
email: basile<at>starynkevitch<dot>net
aliases: basile<at>tunes<dot>org = bstarynk<at>nerim<dot>net
8, rue de la Faïencerie, 92340 Bourg La Reine, France
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next prev parent reply other threads:[~2003-03-29 9:15 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-29 8:48 Dr.Dr.Ruediger M.Flaig
2003-03-29 9:15 ` Basile STARYNKEVITCH [this message]
2003-03-29 11:04 ` Sylvain LE GALL
2003-03-30 9:53 ` Damien Doligez
2003-03-30 14:23 ` Wolfgang Lux
-- strict thread matches above, loose matches on Subject: below --
2001-12-11 0:25 Jose A. Ortega Ruiz
2001-12-11 2:32 ` Mike Leary
2001-12-11 10:23 ` Sven
2001-08-22 17:58 Collin Monahan
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