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 autolearn=ham
	autolearn_force=no version=3.4.4
X-Google-Thread: a07f3367d7,4cad17e8664256c9
X-Google-Attributes: gida07f3367d7,public,usenet
X-Google-NewGroupId: yes
X-Google-Language: ENGLISH,ASCII
Path: 
 g2news2.google.com!postnews.google.com!x6g2000vbg.googlegroups.com!not-for-mail
From: Martin <martin.dowie@btopenworld.com>
Newsgroups: comp.lang.ada
Subject: Re: Allocation questions
Date: Thu, 28 May 2009 03:40:10 -0700 (PDT)
Organization: http://groups.google.com
Message-ID: <40a2a911-6b92-407e-b1e3-deabf154892f@x6g2000vbg.googlegroups.com>
References: <4a1e5d9e$0$2868$ba620e4c@news.skynet.be>
 <106ssailgl19b$.1sngvazrm7u5w.dlg@40tude.net>
NNTP-Posting-Host: 20.133.0.8
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
X-Trace: posting.google.com 1243507210 22777 127.0.0.1 (28 May 2009 10:40:10
 GMT)
X-Complaints-To: groups-abuse@google.com
NNTP-Posting-Date: Thu, 28 May 2009 10:40:10 +0000 (UTC)
Complaints-To: groups-abuse@google.com
Injection-Info: x6g2000vbg.googlegroups.com; posting-host=20.133.0.8;
	posting-account=g4n69woAAACHKbpceNrvOhHWViIbdQ9G
User-Agent: G2/1.0
X-HTTP-UserAgent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB;
 rv:1.9.0.10)
	Gecko/2009042316 Firefox/3.0.10,gzip(gfe),gzip(gfe)
Xref: g2news2.google.com comp.lang.ada:6062
Date: 2009-05-28T03:40:10-07:00
List-Id: <comp.lang.ada>

On May 28, 11:05=A0am, "Dmitry A. Kazakov" <mail...@dmitry-kazakov.de>
wrote:
[snip]
> =A0 =A0 =A0function Create_Delay(Time_Value: Time) return Delay_T is
> =A0 =A0 =A0 =A0 Result : Delay_T (Natural (Time_Value * 44_100.0));
> =A0 =A0 =A0begin
> =A0 =A0 =A0 =A0 Result.Delay_Time :=3D Time_Value;
> =A0 =A0 =A0 =A0 Result.Output =A0:=3D 0.0;
> =A0 =A0 =A0 =A0 return Result;
> =A0 =A0 =A0end Create_Delay;

It would be even better to do it all in a single assignment, so that
when new components are added to the record the compiler will complain
and force you to initialise them too.

Cheers
-- Martin

p.s. here's a demo:

with Ada.Text_IO; use Ada.Text_IO;
procedure Demo is
   package D is
      type No_Of_Samples is range 0 .. 1_000;
      type A_of_F is array (No_Of_Samples range <>) of Float;
      type R (S : No_Of_Samples :=3D 0) is private;
      function Create (N : No_Of_Samples) return R;
      procedure Put_Line (This_R : R);
   private
      type R (S : No_Of_Samples :=3D 0) is
         record
            I : Integer;
            B : Boolean;
            A : A_Of_F (1 .. S);
         end record;
   end D;
   package body D is
      function Create (N : No_Of_Samples) return R is
      begin
         return (S =3D> N,
                 I =3D> 0,
                 B =3D> False,
                 A =3D> (others =3D> 0.0));
      end Create;
      procedure Put_Line (This_R : R) is
      begin
         Put_Line (Integer'Image (This_R.I));
         Put_Line (Boolean'Image (This_R.B));
         Put_Line (No_Of_Samples'Image (This_R.S));
         for I in This_R.A'Range loop
            Put_Line (Float'Image (This_R.A (I)));
         end loop;
      end Put_Line;
   end D;

   R_1 : D.R :=3D D.Create (1);
   R_5 : D.R :=3D D.Create (5);
begin
   D.Put_Line (R_1);
   D.Put_Line (R_5);
end Demo;