From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM
	autolearn=unavailable autolearn_force=no version=3.4.4
Path: 
 buffer1.nntp.dca1.giganews.com!border1.nntp.dca1.giganews.com!nntp.giganews.com!usenet.blueworldhosting.com!feeder01.blueworldhosting.com!feeder.erje.net!eu.feeder.erje.net!eternal-september.org!feeder.eternal-september.org!aioe.org!.POSTED!not-for-mail
From: Victor Porton <porton@narod.ru>
Newsgroups: comp.lang.ada
Subject: Why this program does not compile? (iterators)
Date: Fri, 22 Aug 2014 20:18:45 +0300
Organization: Aioe.org NNTP Server
Message-ID: <lt7u1i$6bn$1@speranza.aioe.org>
NNTP-Posting-Host: AnnUDmZwVERVUXyHDyOl5A.user.speranza.aioe.org
Mime-Version: 1.0
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 8Bit
X-Complaints-To: abuse@aioe.org
User-Agent: KNode/4.13.3
X-Notice: Filtered by postfilter v. 0.8.2
Xref: number.nntp.dca.giganews.com comp.lang.ada:188597
Date: 2014-08-22T20:18:45+03:00
List-Id: <comp.lang.ada>

Why this program does not compile?

gnatgcc -c -g -O2 -gnat2012 -g -O0 -gnato -fstack-check -gnatVa special_test.adb
<built-in>: In function ‘Special_Test’:
<built-in>: error: aggregate value used where an integer was expected

with Ada.Iterator_Interfaces;

procedure Special_Test is

   type My_Description_Cursor is null record;
   
   function Has_Element (Position: My_Description_Cursor) return Boolean is (False);

   package My_Description_Iterators is new Ada.Iterator_Interfaces(My_Description_Cursor, Has_Element);

   type My_Description_Iterator is new My_Description_Iterators.Forward_Iterator with null record;
   
   overriding function First (Object: My_Description_Iterator) return My_Description_Cursor is (null record);
   overriding function Next (Object: My_Description_Iterator; Position: My_Description_Cursor) return My_Description_Cursor is (null record);

   My_Iterator: My_Description_Iterator;

begin
   for C in My_Iterator loop
      null;
   end loop;
end;


-- 
Victor Porton - http://portonvictor.org