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From: Pixel <pixel@mandrakesoft.com>
To: caml-list@pauillac.inria.fr
Subject: [Caml-list] "Or" patterns when both matchings
Date: 28 Oct 2001 12:02:02 +0100	[thread overview]
Message-ID: <ly3d44yqmt.fsf@leia.mandrakesoft.com> (raw)


from the documentation:
  The pattern pattern1 | pattern2 represents the logical ``or'' of the two
  patterns pattern1 and pattern2. [...] If both matchings succeed, it is
  undefined which set of bindings is selected.

is there a reason for not using the classical pattern matching rule, to make
the ordering matters? (i've been nastily beat by this :-/)

eg:


type foo = Bar | Foo of foo

let f1 = function
  | Foo(a) 
  | a -> a

let f2 = function
  | Foo(a) -> a
  | a -> a

let e1 = f1 (Foo Bar)  (*=> Foo Bar *)
let e2 = f2 (Foo Bar)  (*=> Bar *)


thanks
--
Pixel
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             reply	other threads:[~2001-10-28 11:03 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-10-28 11:02 Pixel [this message]
2001-10-29 10:37 ` Luc Maranget
2001-10-30 18:22 Manuel Fahndrich
2001-10-31  9:42 ` Luc Maranget

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