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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: Array Help?
Date: Wed, 29 Feb 2012 20:47:04 +0000
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Date: 2012-02-29T20:47:04+00:00
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Robert A Duff <bobduff@shell01.TheWorld.com> writes:

> Ludovic Brenta <ludovic@ludovic-brenta.org> writes:
>
>> Doesn't that preclude slices that don't start at 'First?
>
> Yes.
>
>> Supposing your declarations, can you call
>>
>> procedure Foo (Param : in out Integer_Array);
>>
>> like this:
>>
>> declare
>>    A : Integer_Array (1 .. 10) := (others => 0);
>> begin
>>    Foo (A (3 .. 8));
>> end;
>>
>> ?
>
> That will raise C_E.  IMHO, that's a language design flaw -- inside
> Foo, Param'First ought to be 1.  The fact that Foo can see that
> it came from a slice is a leak of abstraction.

I know that GNAT is a work-in-progress, but it doesn't raise C_E with
GNAT GPL 2011.