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=0.2 required=5.0 tests=BAYES_00,INVALID_MSGID,
	REPLYTO_WITHOUT_TO_CC autolearn=no autolearn_force=no version=3.4.4
X-Google-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: 103376,ba92fa04d48e3ba0
X-Google-Attributes: gid103376,public
From: Mats Weber <Mats.Weber@elca-matrix.ch>
Subject: Re: "<" operator
Date: 1997/10/09
Message-ID: <343CE494.928C2F84@elca-matrix.ch>#1/1
X-Deja-AN: 278980795
References: <343A7434.36AD@newtimes.com>
 <mheaney-ya023680000710971821260001@news.ni.net>
Organization: ELCA Matrix SA
Reply-To: Mats.Weber@elca-matrix.ch
Newsgroups: comp.lang.ada
Date: 1997-10-09T00:00:00+00:00
List-Id: <comp.lang.ada>


Assuming the guy wants lexicographic order (and wants the function to work
with lists of different lengths), I think this should be corrected as follows:

> function "<"
>   (L, R : Character_List) return Boolean is
> begin
>    if L = null then
>       if R = null then
>          return True;

should be  return False;   -- because you probably want ("" < "") = False

>       else
>          raise <lists are not same length error>;

should be  return True;    -- because "" < anything

>       end if;
> 
>    elsif R = null then
>       raise <lists are not same length error>;

should be return False;   -- because anything > ""

>    else
>       return L.Item < R.Item and L.Next < R.Next;
> 
>    end if;
> end;