From: Ville-Pertti Keinonen <will@exomi.com>
To: "Christophe Poucet" <christophe.poucet@pandora.be>
Cc: <caml-list@inria.fr>
Subject: Re: [Caml-list] Sumtypes of records
Date: Fri, 9 May 2003 20:12:17 +0300 [thread overview]
Message-ID: <62B8AA7D-8241-11D7-A0A9-000393863F70@exomi.com> (raw)
In-Reply-To: <003e01c31645$2bfa3c00$e50e76d5@j>
> Why can't constructors of sumtypes take nameless records? (Warning
> stupid example follows)
>
> type plop = Foo | Bar {age : int};;
...
Probably because it wouldn't make much sense. Either the only way you
could access age in the above is by matching Bar { age = x }, which is
not very useful (you might as well have Bar of int, or a tuple for
multiple fields), or the record type needs to have a name so that x in
the pattern Bar x has some printable type.
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next prev parent reply other threads:[~2003-05-09 17:12 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-09 16:08 Christophe Poucet
2003-05-09 17:12 ` Ville-Pertti Keinonen [this message]
2003-05-17 1:35 ` Chris Hecker
2003-05-17 8:13 ` Ville-Pertti Keinonen
2003-05-17 8:24 ` Ville-Pertti Keinonen
2003-05-17 13:26 ` Marcin 'Qrczak' Kowalczyk
2003-05-18 6:33 ` Chris Hecker
2003-05-18 7:46 ` Marcin 'Qrczak' Kowalczyk
2003-06-02 21:29 ` John Max Skaller
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