From: Pierre-Alexandre Voye <ontologiae@gmail.com>
To: caml-list <caml-list@inria.fr>
Subject: [Caml-list] How an exception could be an argument
Date: Fri, 17 Feb 2012 19:16:42 +0100 [thread overview]
Message-ID: <CANnJ5GdKgpk_E1F3B9GDS-SC3EnnvLTTOgGRgEsvbZL0S_VGag@mail.gmail.com> (raw)
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Hello, I'm trying to implement a scala concept "partial application" in
which one can chains pattern matching function. If the first failed, the
second is tried.
It seems it is impossible to give an exception as argument to a function.
exception Nothing;;
let (<|||>) a b = try a
with
| Nothing -> (try b
with
| Nothing -> raise
Nothing);;
val ( <|||> ) : 'a -> 'a -> 'a = <fun>
(raise Nothing) <|||>
"jj";;
Exception: Nothing.
But if I try :
try (raise Nothing)
with
| Nothing -> (try
"jj"with
| Nothing -> raise
Nothing);;
- : string = "jj"
Is there a workaround ?
Regards,
P-A
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next reply other threads:[~2012-02-17 18:17 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-17 18:16 Pierre-Alexandre Voye [this message]
2012-02-17 18:33 ` Edgar Friendly
2012-02-17 18:49 ` Vincent Aravantinos
2012-02-17 19:31 ` Tiphaine Turpin
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