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[Caml-list] subtyping and inheritance (bug?)
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Date: 2002-06-25 (12:28)
From: Eray Ozkural <erayo@c...>
Subject: Re: [Caml-list] subtyping and inheritance (bug?)
On Tuesday 25 June 2002 05:54, Jacques Garrigue wrote:
> From: james woodyatt <>
> Sure. The children_set method contains a contravariant occurence of 'self.
> It cannot be compatible with its subclasses.  You don't need to have
> mutable data to have variance incompatibilities.
> No bug, business as usual.

Which programming style would express the intended semantics, then? I guess we 
would need a slightly different formulation.


Eray Ozkural <>
Comp. Sci. Dept., Bilkent University, Ankara
GPG public key fingerprint: 360C 852F 88B0 A745 F31B  EA0F 7C07 AE16 874D 539C

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