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Message-Id: <1791776.Xn1vn8C3jC@linux1.krischik.com>
From: Martin Krischik <martin@krischik.com>
Subject: Re: Memory limits in Ada where Fortran has none
Newsgroups: comp.lang.ada
Reply-To: martin@krischik.com
Date: Sun, 06 Mar 2005 10:33:09 +0100
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Xref: g2news1.google.com comp.lang.ada:8734
Date: 2005-03-06T10:33:09+01:00
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braver wrote:

> Overall, Ada being the language for large systems, I found it
> surprising that Fortran can allocate enough arrays to fill in my
> memory, or even take up virtual memory, while Ada raises
> STORAGE_ERRORs!  I'd like to simply use (1), as in Fortran, and be done
> with it...

It is a problem of the GNAT compiler. GNAT uses 32 bit Integer for the 'Size
attribute. And 'Size is the size in bit - not byte. A few years ago that
was fine but now you a the 2nd person in half a year to hit that limit.

Also, GNAT unlike other Ada compiler won't use heap memory unless beeing
told to (via the keyword new) so the array is either static or stack - both
might be limited by the operating system.

Martin
-- 
mailto://krischik@users.sourceforge.net
Ada programming at: http://ada.krischik.com