Re: Exceptions in GNAT

["David C. Hoos, Sr." <david.c.hoos.sr@ada95.com>]

----- Original Message ----- 
From: "David Rasmussen" <pinkfloydhomer@yahoo.com>
Newsgroups: comp.lang.ada
To: <comp.lang.ada@ada.eu.org>
Sent: Sunday, June 02, 2002 6:01 AM
Subject: Exceptions in GNAT


> I am learning Ada, and in one exercise I am told to find out how large 
> and integer I can use on my system, before it overflows. The exercise 
> just tells me to add two larger and larger numbers and see when an 
> exception occurs. I have just compiled my program with gnatmake with no 
> options, and I am using gcc 3.1 . When the numbers get large enough, the 
> result is just a negative number because of wrap-around. Shouldn't I get 
> an exception, unless I turn it off? How do I compile for with most 
> checks for debug builds, and how do I compile with everything turned off 
> for performance intensive release builds?
> 
The answers to "how to" questions for GNAT are all contained in the
documentation with GNAT.  If you don't have that, it's downloadable from
ftp.cs.nyu.edu/pub/gnat/3.14p for whatever platform you're using.

E.g., the question about numeric overflow checking is answered by a
search for "numeric overflow" in the GNAT User's Guide.