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Date: Sun, 7 Nov 1999 11:37:12 +0100
From: Christian RINDERKNECHT <rinderkn@hugo.int-evry.fr>
To: Jerome Vouillon <Jerome.Vouillon@inria.fr>
Cc: caml-list@inria.fr
Subject: Re: [Q] Four micro-questions on objects and modules.
Message-ID: <19991107113712.B5760@hugo.int-evry.fr>
References: <19991102140952.A16438@jones.int-evry.fr> <19991103224029.11296@pauillac.inria.fr>
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In-Reply-To: <19991103224029.11296@pauillac.inria.fr>; from Jerome Vouillon on Wed, Nov 03, 1999 at 10:40:29PM +0100
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Hello,

> >  3) Would it be possible to allow the "include" feature in class
> >     types? 
> 
> What do you mean ? A class type can inherit from another class type :
>    class type c = object method m : int end
>    class type d = object inherit c method n : bool end

Okay. This is exactly what I was asking for. But... now I am a little
bit confused since I was used to think that inheritance was a concept
that applies to classes, and (sub)typing to class types. Could you
explain? (Please note I am new to these topics...)

It may be not related, but the toplevel does not print out the "inherit"
construct after the typing of the classes:

        Objective Caml version 2.02

# class x =                        
    object
      method m = ()
    end
  ;;
class x : object method m : unit end
# class y =
    object
      inherit x  
      method n = ()
    end
  ;;
class y : object method m : unit method n : unit end
                 ^^^^^^^^^^^^^^^
                 No "inherit x" used instead here...


Best regards,

-- 

Christian

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