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[Caml-list] exceptions and the polymorphic equality
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Date: | 2001-07-15 (13:05) |
From: | eijiro_sumii@a... |
Subject: | [Caml-list] exceptions and the polymorphic equality |
Hello, I have a question about the polymorphic equality and exceptions: it seems to me that the behaviour of "=" is counter-intuitive with respect to pattern matching of exceptions, for example as follows. Objective Caml version 3.01 # exception Foo;; exception Foo # let e = Foo;; val e : exn = Foo # exception Foo;; exception Foo # let e' = Foo;; val e' : exn = Foo # e = e';; - : bool = true # match e with Foo -> true | _ -> false;; - : bool = false # try raise e with Foo -> ();; Uncaught exception: Foo. # I know that the two Foo's above should be distinct, but then shouldn't e = e' also return false? Is this issue well known? Eijiro ------------------- Bug reports: http://caml.inria.fr/bin/caml-bugs FAQ: http://caml.inria.fr/FAQ/ To unsubscribe, mail caml-list-request@inria.fr Archives: http://caml.inria.fr