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 X-Received: by 10.236.101.148 with SMTP id b20mr807778yhg.46.1407598568757; Sat, 09 Aug 2014 08:36:08 -0700 (PDT) X-Received: by 10.140.87.67 with SMTP id q61mr395834qgd.1.1407598568696; Sat, 09 Aug 2014 08:36:08 -0700 (PDT) Path: eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!news.eternal-september.org!news.eternal-september.org!news.eternal-september.org!feeder.eternal-september.org!usenet.blueworldhosting.com!feeder01.blueworldhosting.com!peer03.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!v10no5716497qac.1!news-out.google.com!j6ni34691qas.0!nntp.google.com!v10no5716496qac.1!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail Newsgroups: comp.lang.ada Date: Sat, 9 Aug 2014 08:36:08 -0700 (PDT) In-Reply-To: Complaints-To: groups-abuse@google.com Injection-Info: glegroupsg2000goo.googlegroups.com; posting-host=93.37.89.62; posting-account=9fwclgkAAAD6oQ5usUYhee1l39geVY99 NNTP-Posting-Host: 93.37.89.62 References: User-Agent: G2/1.0 MIME-Version: 1.0 Message-ID: Subject: Re: Null unbounded string From: mockturtle Injection-Date: Sat, 09 Aug 2014 15:36:08 +0000 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Received-Bytes: 1659 X-Received-Body-CRC: 1339945898 Xref: news.eternal-september.org comp.lang.ada:21605 Date: 2014-08-09T08:36:08-07:00 List-Id: On Saturday, August 9, 2014 5:28:49 PM UTC+2, Victor Porton wrote: > Is Ada.Strings.Unbounded.Null_Unbounded_String an empty string or is it= =20 > something different (like NULL char pointer in C)? >=20 I'm not a language lawyer, but I would say that from a "conceptual" point o= f view is a string (e.g., you can concatenate it with other strings). How = the null string is actually implemented, I think, it is a "private" matter = of the implementation that could decide to represent it as a NULL pointer. = Maybe a LL can elaborate more on this.