From: Jacques Garrigue <garrigue@kurims.kyoto-u.ac.jp>
To: Vincent.Barichard@info.univ-angers.fr
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] ocaml 3.07 and optional arguments
Date: Tue, 30 Sep 2003 10:24:30 +0900 [thread overview]
Message-ID: <20030930102430J.garrigue@kurims.kyoto-u.ac.jp> (raw)
In-Reply-To: <3F78763D.000003.03248@lanfeust>
From: "Vincent Barichard" <Vincent.Barichard@info.univ-angers.fr>
> I've just downloaded ocaml 3.07 and compil it. But when I try to compil old
> programs, I encounter some problems with optional arguments in methods.
[...]
> Is there any changes with the use of optional arguments for methods ?
I don't remember introducing any change at that level.
Your exemple is not detailed enough that I can infer the real cause.
You should submit a bug report including a minimal set of sources
producing the error.
A reasonable hypothesis is that you have fallen into the
non-principality of optional arguments (which is explained in the
manual). Try compiling your sources with ocaml 3.06, adding the option
ocamlc -principal.
If it tells you that some use is not principal, then the cause is the
increased polymorphism in 3.07: some type sharing appearing in 3.06
does not appear in 3.07. In general more polymorphism is a good thing,
but with non-principal features it may introduce incompatibilities.
Here, this would mean that you need another type annotation elsewhere.
Byt the way, why do you write
(sol#scalarizingFunction : ?weightVector':Solution.cWeightVector -> Solution
cPoint -> float)
rather than "(sol : #Solution.solution)#scalarizingFunction" ?
Jacques Garrigue
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next prev parent reply other threads:[~2003-09-30 1:24 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-29 18:13 Vincent Barichard
2003-09-30 1:24 ` Jacques Garrigue [this message]
2003-09-30 3:07 ` Jacques Garrigue
2003-09-30 5:29 ` Vincent Barichard
2003-09-30 19:18 Arturo Borquez
2003-10-01 0:04 ` Jacques Garrigue
2003-10-01 8:43 ` Christophe Raffalli
2003-10-01 15:45 ` Yaron Minsky
2003-10-01 15:54 ` Alain.Frisch
2003-10-01 20:28 Arturo Borquez
2003-10-01 23:51 ` Jacques Garrigue
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