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From: mheaney@ni.net (Matthew Heaney)
Subject: Re: Associating strings with buffers?
Date: 1997/04/11
Message-ID: <mheaney-ya023680001104972227110001@news.ni.net>#1/1
X-Deja-AN: 234249509
References: <5im1cs$kap@basement.replay.com>
Organization: Estormza Software
Newsgroups: comp.lang.ada
Date: 1997-04-11T00:00:00+00:00
List-Id: <comp.lang.ada>


In article <5im1cs$kap@basement.replay.com>, Harold Hoes
<hhoes@nym.alias.net> wrote:

>Is there a predefined package to associate strings with buffers?
>Thanks in advance.

I don't know what you mean.

There are some string buffer packages, though:

Ada.Strings.Fixed
Ada.Strings.Bounded
Ada.Strings.Unbounded

Is that what you want?

Here's a lower-level way of associating a string with a buffer:

subtype Length_Range is Natural range 0 .. 132;

type String_Buffer (Length : Length_Range := 0) is
   record
      Text : String (1 .. Length);
   end record;

function "+" (R : String) return String_Buffer is
begin
   return (R'Length, R);
end;

So you can do this:

Send_Pete_To_Town:
declare
   The_String : String_Buffer;
begin
   The_String := +"how now brown cow";
   The_String := +"Goodbye Sister Disco";
   The_String := +"don't cry, don't say goodbye, it's only teenage wasteland";
   Text_IO.Put_Line (The_String.Text);
end Send_Pete_To_Town;

Of course, type Ada.Strings.Bounded is prefered for this sort of thing.  I
show this technique because it's sometimes useful for other kinds of
arrays.

--------------------------------------------------------------------
Matthew Heaney
Software Development Consultant
<mailto:matthew_heaney@acm.org>
(818) 985-1271