From: dch@st-vincent (David Haslam)
Subject: 'size works for SunAda but not GNAT
Date: 1996/10/08
Date: 1996-10-08T00:00:00+00:00 [thread overview]
Message-ID: <53dv03$3ti@gcsin3.geccs.gecm.com> (raw)
I have a lot of code like this, which compiles fine
with SunAda 1.1:
subtype V is integer range 0..63;
type A is array (1..9) of V;
for A'size use 9 * 8;
GNAT complains "size for A must be at least 288".
GNAT wants V to be 32 bits, even though it can fit in 8.
If GNAT is correct in rejecting this, then it implies that the
code we have is non-portable (and relied on a Verdix implementation
dependent feature).
If so, how do I write portable rep clauses?
There are two ways of fixing the code for GNAT:
1. use a type instead of a subtype
2. add the line: "for A'component_size use 8;"
Which of these is better?
--
David Haslam Work: David.Haslam@gecm.com
GEC-Marconi S3I Ltd Home: dch@sirius.demon.co.uk
Simulation and Training Division
next reply other threads:[~1996-10-08 0:00 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
1996-10-08 0:00 David Haslam [this message]
1996-10-09 0:00 ` 'size works for SunAda but not GNAT Robert Dewar
1996-10-09 0:00 ` Stephen Leake
1996-10-11 0:00 ` Alan Brain
1996-10-11 0:00 ` Robert Dewar
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