From: Neil Jerram <neil@ossau.uklinux.net>
Cc: tb@becket.net (Thomas Bushnell, BSG),
Sven Hartrumpf <Sven.Hartrumpf@FernUni-Hagen.de>,
guile-user@gnu.org
Subject: Re: stupid mail about letrec
Date: 25 Mar 2002 19:48:13 +0000 [thread overview]
Message-ID: <m37ko0fmyq.fsf@laruns.ossau.uklinux.net> (raw)
In-Reply-To: <87u1r4zdl8.fsf@zagadka.ping.de>
>>>>> "Marius" == Marius Vollmer <mvo@zagadka.ping.de> writes:
Marius> tb@becket.net (Thomas Bushnell, BSG) writes:
>> Sven Hartrumpf <Sven.Hartrumpf@FernUni-Hagen.de> writes:
>>
>> > >So chicken and MIT-scheme don't give you an error for the letrec
>> > >expression that you quoted before?
>> >
>> > No, all return 8 for (letrec ((a 2) (b (* a 4))) b).
>> > Also mzscheme, bigloo, chez, sisc, scsh, gauche, gambit.
>> > Only SCM behaves like guile.
>> > This might make an interesting posting in comp.lang.scheme :-)
>>
>> Yes, but it is an error nontheless.
Marius> However, I think it is an interesting extension. Internal defines
Marius> would behave more 'natural' that way. It's probably better to define
Marius> a new letrec* form, tho, instead of changing the definition of letrec.
I'm pretty sure there was a big discussion about this a few years ago.
Neil
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next prev parent reply other threads:[~2002-03-25 19:48 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-03-25 13:02 stupid mail about letrec Sven Hartrumpf
2002-03-25 16:02 ` Thomas Bushnell, BSG
2002-03-25 18:33 ` Per Bothner
2002-03-25 18:50 ` Marius Vollmer
2002-03-25 19:48 ` Neil Jerram [this message]
-- strict thread matches above, loose matches on Subject: below --
2002-03-21 17:22 Sebastien.deMentendeHorne
2002-03-21 23:09 ` Neil Jerram
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