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Date: Thu, 5 Dec 2013 16:13:42 +0100
From: Goswin von Brederlow <goswin-v-b@web.de>
To: Dmitri Boulytchev <dboulytchev@gmail.com>
Cc: caml-list <caml-list@inria.fr>
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Subject: Re: [Caml-list] Confusing behaviour of type inference for
 polymorphic classes.

On Mon, Dec 02, 2013 at 07:05:45PM +0400, Dmitri Boulytchev wrote:
> >I think this is caused by the recursion. The type inference assumes
> >that the recursive call will have the same type as the parent. Since
> >you switch 'a and 'b in the recursive call the compiler inferes that
> >'a == 'b.
> >
>     I don't think we have a recursive call here since we call
> a method from *another* object.
> 
>     BR,
>     DB

Different instance but same class and method. The type system is a bit
odd with objects sometimes.
 
MfG
	Goswin