From: dewar@merv.cs.nyu.edu (Robert Dewar)
Subject: Re: Help - Constructors - ASAP.
Date: 1998/08/01
Date: 1998-08-01T00:00:00+00:00 [thread overview]
Message-ID: <dewar.901945397@merv> (raw)
In-Reply-To: EACHUS.98Jul30114523@spectre.mitre.org
Robert Eachus says
<< There are two reasons for following the advice. First is that Ada
has a rule that inherited functions with a controlling result are
abstract, so they must be overridden. Yes, there are cases where
constructor functions can be safely inherited from the parent, but
this rule makes you think it through. Second is that when you do want
a constructor which can return any type in the class, the right thing
to do usually is to make it a classwide type.
>>
Well, the cases where safe inheritance would be feasible are limited to
extensions of the type with no additional fields, not very useful!
next prev parent reply other threads:[~1998-08-01 0:00 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-07-23 0:00 Help - Constructors - ASAP Maxim Senin
1998-07-26 0:00 ` Matthew Heaney
1998-07-27 0:00 ` dennison
1998-07-30 0:00 ` Robert I. Eachus
1998-07-30 0:00 ` tedennison
1998-07-31 0:00 ` Matthew Heaney
1998-07-31 0:00 ` Mats Weber
1998-07-31 0:00 ` dennison
1998-08-01 0:00 ` Matthew Heaney
1998-08-01 0:00 ` Robert Dewar
1998-08-01 0:00 ` Matthew Heaney
1998-08-03 0:00 ` Mats Weber
1998-07-31 0:00 ` Robert I. Eachus
1998-08-01 0:00 ` Matthew Heaney
1998-08-01 0:00 ` Robert Dewar [this message]
1998-08-01 0:00 ` Matthew Heaney
1998-08-03 0:00 ` Mats Weber
1998-08-03 0:00 ` Matthew Heaney
1998-08-03 0:00 ` Mats Weber
1998-08-04 0:00 ` Matthew Heaney
1998-08-04 0:00 ` Mats Weber
1998-08-05 0:00 ` Matthew Heaney
1998-08-10 0:00 ` Robert I. Eachus
1998-08-03 0:00 ` tedennison
-- strict thread matches above, loose matches on Subject: below --
1998-07-15 0:00 Maxim Senin
1998-07-16 0:00 ` Stephen Leake
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