From: lutz@iks-jena.de (Lutz Donnerhacke)
Subject: Re: Inheritance and Polymorphism in Ada !!
Date: 1999/10/15
Date: 1999-10-15T00:00:00+00:00 [thread overview]
Message-ID: <slrn80dobi.q4.lutz@taranis.iks-jena.de> (raw)
In-Reply-To: 3806DC34.1513E8B1@frqnet.de
* Andreas Winckler wrote:
>14 begin
>15 pointer := new type_b;
>16 type_b(pointer.all).second_field := 1;
>17 end inheritance_polymorphism;
>
>See line 16, the type of the referenced object must be known in advance.
>With "pointer.second_field :=1" the compiler fails. It seems that the
>strong typing restricts the features of polyormism in Ada. Any comments?
>Am I wrong?
Yep. To access data, please provide functions. They dispach as required for
polymorphism.
next prev parent reply other threads:[~1999-10-15 0:00 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-10-15 0:00 Inheritance and Polymorphism in Ada !! Chango Cho
1999-10-15 0:00 ` Andreas Winckler
1999-10-15 0:00 ` Lutz Donnerhacke [this message]
1999-10-15 0:00 ` Richard D Riehle
1999-10-15 0:00 ` Matthew Heaney
1999-10-15 0:00 ` Richard D Riehle
1999-10-18 0:00 ` Robert Dewar
1999-10-23 0:00 ` Richard D Riehle
1999-10-24 0:00 ` Robert Dewar
1999-10-24 0:00 ` Brian Rogoff
1999-10-26 0:00 ` Robert Dewar
1999-10-25 0:00 ` Robert A Duff
1999-10-26 0:00 ` Robert Dewar
1999-10-26 0:00 ` Robert A Duff
1999-10-18 0:00 ` Robert A Duff
1999-10-19 0:00 ` Robert Dewar
1999-10-20 0:00 ` Robert A Duff
1999-10-21 0:00 ` Robert Dewar
1999-10-21 0:00 ` Simon Wright
1999-10-21 0:00 ` Robert A Duff
1999-10-21 0:00 ` Paul Duquennoy
1999-10-22 0:00 ` Matthew Heaney
1999-10-15 0:00 ` tmoran
1999-10-15 0:00 ` tmoran
1999-10-15 0:00 ` Stephane Barbey
1999-10-15 0:00 ` Matthew Heaney
1999-10-18 0:00 ` Robert A Duff
1999-10-18 0:00 ` Brian Rogoff
1999-10-18 0:00 ` Robert A Duff
1999-10-15 0:00 ` Ted Dennison
1999-10-15 0:00 ` Lutz Donnerhacke
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