From mboxrd@z Thu Jan  1 00:00:00 1970
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From: Robert A Duff <bobduff@world.std.com>
Subject: Re: BLAS
Date: 2000/05/15
Message-ID: <wccvh0g123s.fsf@world.std.com>#1/1
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Sender: bobduff@world.std.com (Robert A Duff)
References: <E12rFJO-00008Q-00@Baldrick>
Organization: The World Public Access UNIX, Brookline, MA
Newsgroups: comp.lang.ada
Date: 2000-05-15T00:00:00+00:00
List-Id: <comp.lang.ada>

Duncan Sands <sands@topo.math.u-psud.fr> writes:

> >> generic
> >>    type Float_Type is digits <>;
> >>    type Matrix is array (Integer range <>, Integer range <>) of Float_Type'Base;
> >> 
> >> is rejected by GNAT.  
> >
> >On what grounds?  It looks legal to me...
> 
> GNAT says:
> 3.    type Matrix is array (Integer range <>, Integer range <>) of Float_Type'Base;
>                      |
> >>> only a subtype mark is allowed in a formal
> 
> The RM says (Generic Units - Formal Array Types): "The only form of
> discrete_subtype_definition that is allowed within the declaration of
> a generic formal (constrained) array subtype is a subtype_mark."

But Float_Type'Base *is* a subtype_mark.  See AARM-3.2.2(4.a).
I suggest you send a bug report.

- Bob