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From: JSharer-No_Spam_@psu.edu (Jack W. Sharer)
Subject: Re: Access and alias
Date: 2000/04/10
Message-ID: <8cshra$qbq@r02n01.cac.psu.edu>#1/1
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References: <8ckeup$9ed$1@nnrp1.deja.com>
 <K5rH4.445$uE2.158283@news.pacbell.net>
Organization: Penn State University, Center for Academic Computing
Reply-To: JSharer-No_Spam_@psu.edu (Jack W. Sharer)
Newsgroups: comp.lang.ada
Date: 2000-04-10T00:00:00+00:00
List-Id: <comp.lang.ada>

The following code does not compile. Why?  How do I fix it?

with Interfaces.C.Strings; use Interfaces.C.Strings;
procedure Test_Access is
   procedure EngOutputBuffer ( OutputBuffer: in Chars_Ptr );
   pragma Import ( C, EngOutputBuffer, "engOutputBuffer" );
   Matlab_Output: aliased Interfaces.C.Char_Array(1..50000);
begin
   EngOutputBuffer ( To_Chars_Ptr ( Matlab_Output'Access ) );
end Test_Access;

The compiler is gnat under Sun Solaris.
The compiler generated messages are
   warning: aliased object has explicit bounds
   warning: declare with explicit initialization
   warning: for use with unconstrained access
   object subtype must statically match designated subtype