From: Philippe Veber <philippe.veber@gmail.com>
To: caml users <caml-list@inria.fr>
Subject: [Caml-list] ignore semantics
Date: Mon, 17 Dec 2012 13:11:31 +0100 [thread overview]
Message-ID: <CAOOOohRkuj75HebyUpSVVfL8i3xmff0BfkxAiCqLadNy0cWDng@mail.gmail.com> (raw)
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Dear all,
This is a rather minor issue, but I was surprised by the following answers
of the interpreter:
OCaml version 4.00.1
# ignore succ;;
Warning 5: this function application is partial,
maybe some arguments are missing.
- : unit = ()
# (fun _ -> ()) succ;;
- : unit = ()
I naively used to think the two expressions were equivalent. Reading
pervasives.mli, I found that ignore is a primitive:
external ignore : 'a -> unit = "%ignore"
which means it is treated as a special case. Just for curiosity, what is
the rationale for the warning in the first case?
Cheers,
Philippe.
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next reply other threads:[~2012-12-17 12:11 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-17 12:11 Philippe Veber [this message]
2012-12-17 13:32 ` John Whitington
2012-12-18 13:41 ` Philippe Veber
2012-12-18 1:28 ` Francois Berenger
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