From: "Denis Bueno" <dbueno@gmail.com>
To: "OCaml Mailing List" <caml-list@inria.fr>
Subject: Variable pattern matching tuple
Date: Mon, 18 Sep 2006 21:26:15 -0400 [thread overview]
Message-ID: <6dbd4d000609181826p6beca937y515903dc76628fc3@mail.gmail.com> (raw)
The following is not intuitive to me.
# type 'a withint = Withint of 'a * int;;
type 'a withint = Withint of 'a * int
# let foo = Withint ("hi there", 4);;
val foo : string withint = Withint ("hi there", 4)
# match foo with Withint _ -> ();;
- : unit = ()
# match foo with Withint d -> d;; (* expression A*)
Characters 15-24:
match foo with Withint d -> d;;
^^^^^^^^^
The constructor Withint expects 2 argument(s),
but is here applied to 1 argument(s)
#
What is the reason that expression A won't compile? Can't one variable
stand for a tuple in a pattern-matching clause?
-Denis
next reply other threads:[~2006-09-19 1:26 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-19 1:26 Denis Bueno [this message]
2006-09-19 1:40 ` [Caml-list] " Pietro Abate
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