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From: "Clueless" <chris@dont.spam.me>
Subject: Re: Naturals and discrete types
Newsgroups: comp.lang.ada
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Date: Thu, 01 Nov 2001 22:59:48 GMT
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In article <oGjE7.221593$K6.106487221@news2>, "Clueless"
<chris@dont.spam.me> wrote:

> 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

Alright...I've got the Command_Line package figured out.

Basically, I stopped trying to rewrite what was already there. Heh.

However, I'm still a little fuzzy on the best way to convert between real
and discrete types.

Thanks for any pointers.

McDoobie
Clueless
chris@dont.spam.me