From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.3 required=5.0 tests=BAYES_00,INVALID_MSGID autolearn=no autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,555956c1cdd22308 X-Google-Attributes: gid103376,public From: tedennison@my-dejanews.com Subject: Re: Help - Constructors - ASAP. Date: 1998/08/03 Message-ID: <6q4d38$t7p$1@nnrp1.dejanews.com>#1/1 X-Deja-AN: 377475707 References: <6p75qi$rcj@news.latnet.lv> <6pi4jq$j73$1@nnrp1.dejanews.com> Organization: Deja News - The Leader in Internet Discussion X-Article-Creation-Date: Mon Aug 03 13:14:16 1998 GMT Newsgroups: comp.lang.ada X-Http-User-Agent: Mozilla/4.0 (compatible; MSIE 4.0; Windows NT; Gateway2000) Date: 1998-08-03T00:00:00+00:00 List-Id: In article , dewar@merv.cs.nyu.edu (Robert Dewar) wrote: > 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! ..or with only defaulted fields, or fields where sensible defaults exist. But yes, I'm beginning to see the light here. T.E.D. -----== Posted via Deja News, The Leader in Internet Discussion ==----- http://www.dejanews.com/rg_mkgrp.xp Create Your Own Free Member Forum