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From: Mendal@SU-SIERRA.ARPA (Geoff Mendal)
Newsgroups: net.lang.ada
Subject: Integer Range Question
Message-ID: <12220812234.39.MENDAL@su-sierra.arpa>
Date: Mon, 7-Jul-86 12:46:35 EDT
Article-I.D.: su-sierr.12220812234.39.MENDAL
Posted: Mon Jul  7 12:46:35 1986
Date-Received: Wed, 9-Jul-86 03:27:26 EDT
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Organization: The ARPA Internet
List-Id: <comp.lang.ada>

Here's another brain twister from the hackers at Stanford.
We're trying to determine whether the following predefined
integer type is valid (assume that it is the only predefined
integer type):

  type Integer is range 1 .. 0;

The real question here is whether a null range is "symmetric about
zero", as required for all predefined integer types.  Also at
issue is whether System.Min_Int *must* be negative, and likewise
System.Max_Int positive.

We don't know the answer, so any help is appreciated.

LRM references: 3.5(3); 3.5.4(6..7,13); 13.7.1(2..3)

gom
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