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From: Brian Drummond <brian3@shapes.demon.co.uk>
Subject: Re: subtype of System.Address type
Newsgroups: comp.lang.ada
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On Wed, 26 Feb 2014 21:19:57 -0800, ashwath30jul77 wrote:

> Hello,
> My compiler(GNAT 3.1 ) gives an error for the following statement.
> 
>  subtype MEMORY_RANGE_TYPE is SYSTEM.ADDRESS range
>  16#0000_0000#..16#7FFF_FFFF#;
> 
> It says incorrect constraint for this type.

What makes you think SYSTEM.ADDRESS is 32 bits, or even a single quantity 
rather than a tuple(segment,offset) or something else?

- Brian