From: Pierre Weis <weis@pauillac.inria.fr>
To: caml-list@pauillac.inria.fr
Subject: Polymorphic comparison
Date: Tue, 18 Oct 1994 10:32:11 +0100 (MET) [thread overview]
Message-ID: <9410180932.AA28209@pauillac.inria.fr> (raw)
To: caml-list@pauillac.inria.fr
Cc: John.Harrison@cl.cam.ac.uk
Subject: Polymorphic <<
Date: Mon, 17 Oct 94 16:10:57 +0100
Classic ML had a polymorphic test comparison "$<< : * -> ** -> bool"
(or in CAML parlance, "prefix << : 'a -> 'b -> bool"). This was claimed
to be substitutive w.r.t ML equality, i.e. if x = x' and y = y' then x
<< y iff x' << y' (I'm not sure about function types). Thus, unless
the implementation is globally hash-consed, it isn't just pointer comparison.
Anyway, though a bit of a hack, it's quite a handy thing to have around for
performing arbitrary canonicalizations. Does CAML Light have anything similar?
John.
next reply other threads:[~1994-10-18 9:32 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
1994-10-18 9:32 Pierre Weis [this message]
1994-10-18 9:43 Pierre Weis
1994-10-18 10:40 Judicael Courant
1994-10-18 12:54 ` John Harrison
1994-10-19 8:47 ` Xavier Leroy
1994-10-18 12:46 Franck.Delaplace
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