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: 1014db,4873305131bf4d94
X-Google-Attributes: gid1014db,public
X-Google-Thread: 103376,4873305131bf4d94
X-Google-Attributes: gid103376,public
X-Google-Thread: 10261c,90121986704b5776
X-Google-Attributes: gid10261c,public
X-Google-Thread: 109fba,4873305131bf4d94
X-Google-Attributes: gid109fba,public
From: dewar@merv.cs.nyu.edu (Robert Dewar)
Subject: Re: Yet another stupid language war (was: ... the only languages you
 need!!)
Date: 1997/11/02
Message-ID: <dewar.878482225@merv>#1/1
X-Deja-AN: 287393926
References: <34557f2b.1934172@news.mindspring.com>
  <3458D116.2D34@pseserv3.fw.hac.com> <63anc7$75p$1@darla.visi.com>
  <345947D2.D20EF8E9@horvath.com> <63d34m$ap7$1@darla.visi.com>
  <01bce627$82afbec0$400d6dce@my-pc.neosoft.com>
 <lVxfAOAEOzW0Ewsm@merlyn.demon.co.uk> <x7vg1pfilr5.fsf@pogner.demon.co.uk>
X-Complaints-To: usenet@news.nyu.edu
X-Trace: news.nyu.edu 878482251 21038 (None) 128.122.140.58
Organization: New York University
Newsgroups: comp.lang.ada,comp.lang.c,comp.lang.c++,comp.lang.pascal.misc
Date: 1997-11-02T00:00:00+00:00
List-Id: <comp.lang.ada>


Simon wrote

  pogner[8]$ cat sizes.ads
  package Sizes is
    type T is range -32768 .. 32768;
    for T'Size use 16;
  end Sizes;
  pogner[9]$ gcc -c -gnatc sizes.ads
  sizes.ads:3:18: size for "T" too small, minimum allowed is 17


Robert notes

For the above program, the error message from GNAT is most certainly
correct, the given range does require 17 bits. Probably what is intended
here is -32768 .. +32767, which on a 2's complement machine (i.e. pretty
much all machines in practice), will fit in 16 bits fine.

Robert Dewar
Ada Core Technologies