From: Jeffrey Carter <jeffrey.carter@boeing.com>
Subject: Re: Static assertions
Date: Thu, 17 May 2001 17:44:04 GMT
Date: 2001-05-17T17:44:04+00:00 [thread overview]
Message-ID: <3B040DE4.468E779F@boeing.com> (raw)
In-Reply-To: 9e0pfb$ao9$1@s1.read.news.oleane.net
Jean-Pierre Rosen wrote:
>
> package Verifier is
> subtype Assert is Boolean range True..True;
>
> Assert_1 : constant := Boolean'Pos( Assert (Integer'Size=32) );
> Assert_2 : constant := Boolean'Pos( Assert
> (Integer'Size=4*Character'Size) );
> end Verifier;
>
> (The Boolean'Pos serves to have a value used in a named number declaration,
> which requires a static context).
Interesting. However, Rational Apex 2.4.6 on HP compiles this fine even
if the declarations are changed to make the expressions false. A test
program to output the values of Assert_X produces 2 zeros.
If I change the declarations to
Assert_1 : constant Assert := Integer'Size = 73;
then the unit will not compile.
--
Jeffrey Carter
next prev parent reply other threads:[~2001-05-17 17:44 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-05-17 15:07 Static assertions Jean-Pierre Rosen
2001-05-17 17:44 ` Jeffrey Carter [this message]
2001-05-17 19:09 ` Marin David Condic
2001-05-17 22:34 ` Jeffrey Carter
2001-05-18 13:39 ` Marin David Condic
2001-05-18 1:23 ` Robert A Duff
2001-05-19 7:40 ` David Kristola
2001-05-19 22:56 ` Robert A Duff
2001-05-19 8:36 ` Aaro Koskinen
2001-05-21 7:50 ` Jean-Pierre Rosen
2001-06-12 3:59 ` David Thompson
-- strict thread matches above, loose matches on Subject: below --
2001-05-18 5:34 Christoph Grein
2001-05-18 13:38 ` Robert A Duff
2001-05-18 16:15 ` Jeffrey Carter
2001-05-18 17:25 ` Ted Dennison
2001-05-18 21:27 ` Robert A Duff
2001-05-18 22:46 ` Jeffrey Carter
2001-05-19 22:53 ` Robert A Duff
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