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: 103376,6ee6f1f1506a654b
X-Google-Attributes: gid103376,public
X-Google-Language: ENGLISH,ASCII-7-bit
Path: 
 g2news2.google.com!news2.google.com!news.germany.com!newsfeed01.sul.t-online.de!t-online.de!newsfeed.arcor.de!newsspool2.arcor-online.net!news.arcor.de.POSTED!not-for-mail
Newsgroups: comp.lang.ada
Subject: Re: Regular Expressions in Ada 2005?
From: Georg Bauhaus <bauhaus@futureapps.de>
In-Reply-To: <1163019181.939463.219520@h48g2000cwc.googlegroups.com>
References: <1163019181.939463.219520@h48g2000cwc.googlegroups.com>
Content-Type: text/plain
Content-Transfer-Encoding: 7bit
Organization: #
Message-ID: <1163020490.7172.33.camel@localhost.localdomain>
Mime-Version: 1.0
X-Mailer: Evolution 2.6.1 
Date: Wed, 08 Nov 2006 22:14:51 +0100
NNTP-Posting-Date: 08 Nov 2006 22:12:24 CET
NNTP-Posting-Host: 81357ecf.newsspool2.arcor-online.net
X-Trace: 
 DXC=eL7=cIfe[d<=FQB?mjjV50A9EHlD;3Yc24Fo<]lROoR1Fl8W>\BH3Y2Q\OId>O0_?<A:ho7QcPOV35`C?]<OAC:?9^cJg_04e9<
X-Complaints-To: usenet-abuse@arcor.de
Xref: g2news2.google.com comp.lang.ada:7377
Date: 2006-11-08T22:12:24+01:00
List-Id: <comp.lang.ada>

On Wed, 2006-11-08 at 12:53 -0800, matthias.kistler@gmx.de wrote:
> Hi!
> 
> Does anybody know, if it's possible to use regular expressions in Ada
> 2005? I come from Perl and I'm very interested in Ada but it's useless
> for me without the possibility of using regular expressions similar to
> Perl.

Ada comes with a rich set of string manipulation packages,
Ada.Strings.*, Ada.Characters.*, Ada.*Text_IO.Editing.

They cover a fair bit of what you would do using Perl's expressions
and translation operators in a sane way.

>   I found a GNAT-package providing only a regex-matcher. But I also
> need a replacer. Elsewise it'd be useless for me.

The GNAT packages do provide scanning and replacement. There is a
tutorial in the package specifications.

Example programs:
http://shootout.alioth.debian.org/gp4/benchmark.php?test=regexdna&lang=gnat&id=3
http://shootout.alioth.debian.org/gp4/benchmark.php?test=regexdna&lang=gnat&id=4

#3 uses Unix style regular expressions.
#4 uses SPITBOL regular expressions.

SPITBOL patterns are quite powerful and fast, in fact you
can write an entire program just as a pattern. But don't do
that.

Georg