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From: "Clueless" <chris@dont.spam.me>
Subject: Naturals and discrete types
Newsgroups: comp.lang.ada
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Date: Thu, 01 Nov 2001 22:05:08 GMT
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Xref: archiver1.google.com comp.lang.ada:15592
Date: 2001-11-01T22:05:08+00:00
List-Id: <comp.lang.ada>

Recently I've been monkeying with the Ada.Command_Line package.

Now I'm running into trouble reading the argument count.

The Ada.Command_Line package returns a Natural type, however I've been
attempting to count the arguments using the Range attribute which expects
a discrete type.
What I've been doing is converting the Natural to an Integer using the
Value attribute. Sometimes this works, and sometimes I get an Exception.

Is it possible to get the 'Range function to accept a Natural type? Or am
I trekking down the wrong path entirely? It seems there has to be a better
way to do this.

Also, I've been checking my Ada docs to find out if the Natural type is
considered to be a Discrete or Real type by the GNAT compiler, but I
havent found any specific info yet. Although the compiler messages
certainly seem to indicate that Natural is a subtype of Real.

Forgive me if this question seems mundane. I've never really had to worry
about the difference back when I was doing C. Heh.

Any clarification, or pointers to the pertinent docs, would be helpful.

Clueless
McDoobie
chris@dont.spam.me