From: Jacques Garrigue <garrigue@kurims.kyoto-u.ac.jp>
To: tews@tcs.inf.tu-dresden.de
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] Mixed class / type
Date: Mon, 04 Feb 2002 11:40:47 +0900 [thread overview]
Message-ID: <20020204114047M.garrigue@kurims.kyoto-u.ac.jp> (raw)
In-Reply-To: <15450.28384.978996.868534@gargle.gargle.HOWL>
From: Hendrik Tews <tews@tcs.inf.tu-dresden.de>
> The real solution would be to allow variant types and classes (or
> at least class types) to be mutually dependent.
>
> Why is this forbidden in ocaml?
The first reason is technical: class types and type declarations are
handled in two different modules, and integrating them would not be
easy.
But there are also more theoretical problems.
Basically, recursion between class types is monomorphic (to allow
propagation of type constraints), while it is polymorphic between type
declarations. So the meaning of a combined declaration is yet to be
defined.
Regards,
Jacques Garrigue
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prev parent reply other threads:[~2002-02-04 2:40 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-30 16:03 Warp
2002-01-30 16:52 ` Remi VANICAT
2002-01-30 23:31 ` Jacques Garrigue
2002-02-01 10:33 ` Hendrik Tews
2002-02-04 2:40 ` Jacques Garrigue [this message]
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