From: Yann Regis-Gianas <Yann.Regis-Gianas@inria.fr>
To: caml-list@inria.fr
Subject: Re: [Caml-list] let () =
Date: Tue, 3 Aug 2004 17:09:16 +0200 [thread overview]
Message-ID: <200408031709.16842.Yann.Regis-Gianas@inria.fr> (raw)
In-Reply-To: <86hdrkth3f.fsf@paul.rtelekom.ru>
Le mardi 3 Août 2004 16:46, Paul Argentoff a écrit :
> Hello World!
>
> Can anyone answer my silly question: what does "let () = bla" really mean?
from http://caml.inria.fr/ocaml/htmlman/manual015.html#s:localdef :
let pattern1 = expr1 and ... and patternn = exprn in expr
from http://caml.inria.fr/ocaml/htmlman/manual014.html :
pattern ::= value-name | ...
and given that '()' is the unique value of type unit, 'let () = bla' means "do
a must-succeed-match between the expression bla and ()'. Thus, this also
means "do nothing but evaluate (reduce) bla'.
Regards,
--
Y.
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next prev parent reply other threads:[~2004-08-03 15:09 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-03 14:46 Paul Argentoff
2004-08-03 15:09 ` Yann Regis-Gianas [this message]
2004-08-03 15:10 ` Richard Jones
2004-08-03 15:11 ` John Prevost
2004-08-03 17:08 ` Nicolas Cannasse
2004-08-04 10:14 ` Keith Wansbrough
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