From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.5-pre1 (2020-06-20) on
	ip-172-31-74-118.ec2.internal
X-Spam-Level: 
X-Spam-Status: No, score=0.0 required=3.0 tests=BAYES_20,FREEMAIL_FROM,
	WEIRD_QUOTING autolearn=ham autolearn_force=no version=3.4.5-pre1
X-Received: by 2002:a37:a08c:: with SMTP id j134mr12023972qke.92.1611777557659;
        Wed, 27 Jan 2021 11:59:17 -0800 (PST)
X-Received: by 2002:a25:768e:: with SMTP id r136mr18988828ybc.92.1611777557452;
 Wed, 27 Jan 2021 11:59:17 -0800 (PST)
Path: eternal-september.org!reader02.eternal-september.org!news.uzoreto.com!feeder1.cambriumusenet.nl!feed.tweak.nl!209.85.160.216.MISMATCH!news-out.google.com!nntp.google.com!postnews.google.com!google-groups.googlegroups.com!not-for-mail
Newsgroups: comp.lang.ada
Date: Wed, 27 Jan 2021 11:59:17 -0800 (PST)
Complaints-To: groups-abuse@google.com
Injection-Info: google-groups.googlegroups.com; posting-host=70.21.182.175; posting-account=h3IwYwoAAAAeE2lWQnRSCqcQ0dO-KDvQ
NNTP-Posting-Host: 70.21.182.175
User-Agent: G2/1.0
MIME-Version: 1.0
Message-ID: <5af60c88-b7ab-4849-badb-c407823d45e0n@googlegroups.com>
Subject: Problem with unbounded string input
From: Brian McGuinness <b.mcguinness747@gmail.com>
Injection-Date: Wed, 27 Jan 2021 19:59:17 +0000
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
Xref: reader02.eternal-september.org comp.lang.ada:61222
List-Id: <comp.lang.ada>

I was having trouble reading unbounded strings, so I wrote a short test pro=
gram and had the same problem.

with Ada.Strings.Unbounded;
with Ada.Text_IO;
with Ada.Text_IO.Unbounded_IO;

procedure scan2 is
  use Ada.Strings.Unbounded;
  line : Ada.Strings.Unbounded.Unbounded_String;
begin
  loop
    Ada.Text_IO.Put ("-> ");
    line :=3D Ada.Text_IO.Unbounded_IO.Get_Line;
    exit when line =3D "quit";
    Ada.Text_IO.Unbounded_IO.Put_Line ("""" & line & """");
  end loop;
end scan2;

When I compile this with gnatmake 8.3.0 under Linux Mint Debian edition 4 a=
nd run it, every so often when I type a line and hit Enter there is no resp=
onse until I hit Enter again, and then everything typed before the first En=
ter is ignored.  The rest of the time the lines I type are read and returne=
d correctly.  I am really puzzled by this.  Is this a bug in the Ada librar=
y or am I doing something wrong?

--- Brian McGuinness