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=-0.3 required=5.0 tests=BAYES_00,FREEMAIL_FROM,
	REPLYTO_WITHOUT_TO_CC autolearn=no autolearn_force=no version=3.4.4
Path: 
 eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!news.eternal-september.org!news.eternal-september.org!news.eternal-september.org!feeder.eternal-september.org!aioe.org!.POSTED!not-for-mail
From: anon@att.net
Newsgroups: comp.lang.ada
Subject: Re: If a routine should return two results, how should it be done?
Date: Sun, 27 Jul 2014 11:59:28 +0000 (UTC)
Organization: Aioe.org NNTP Server
Message-ID: <lr2piv$ec2$1@speranza.aioe.org>
References: <lr0qb7$549$1@speranza.aioe.org>
Reply-To: anon@att.net
NNTP-Posting-Host: 5gPy4UMVqyTrHviwt7a6gw.user.speranza.aioe.org
X-Complaints-To: abuse@aioe.org
X-Notice: Filtered by postfilter v. 0.8.2
X-Newsreader: IBM NewsReader/2 2.0
Xref: news.eternal-september.org comp.lang.ada:21279
Date: 2014-07-27T11:59:28+00:00
List-Id: <comp.lang.ada>

You forgot one:
2.A function with one or more "in" argument(s) that are pointers.

1.   Procedure is the normally way to handle "out" arguments in all  
     Ada. And as of Ada 2012 it just one way.

2.   As for the function with or or more "out" arguments. The only 
     advantage is for interfacing to C routines and libraries. 
     Else, it not very useful. One reason is in some cases the 
     compiler can generate more code to handle the new function 
     design then a procedure.

2.A. As for function with one or more "in" pointer type of argument(s),
     it just bad programming and the compiler should check and report 
     is design as an error.

3.   As for result being a record type.  It just a standard result of 
     some function.


In <lr0qb7$549$1@speranza.aioe.org>, Victor Porton <porton@narod.ru> writes:
>If a routine should return two results, how should it be done?
>
>1. procedure with two out arguments;
>
>2. function with one out argument;
>
>3. create specific record type for the result type of the function?
>
>What are advantages and disadvantages of each variant?
>
>-- 
>Victor Porton - http://portonvictor.org