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=-1.3 required=5.0 tests=BAYES_00,MAILING_LIST_MULTI, REPLYTO_WITHOUT_TO_CC autolearn=no autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,e5221eea63340249 X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2002-11-18 16:50:04 PST Path: archiver1.google.com!news1.google.com!newsfeed.stanford.edu!newsmi-us.news.garr.it!NewsITBone-GARR!news.mailgate.org!fr.usenet-edu.net!usenet-edu.net!enst.fr!not-for-mail From: sk Newsgroups: comp.lang.ada Subject: Re: how to check if a string variable contains a number or string? Date: Mon, 18 Nov 2002 18:44:49 -0600 Organization: ENST, France Sender: comp.lang.ada-admin@ada.eu.org Message-ID: References: Reply-To: comp.lang.ada@ada.eu.org NNTP-Posting-Host: marvin.enst.fr Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Trace: avanie.enst.fr 1037667003 37946 137.194.161.2 (19 Nov 2002 00:50:03 GMT) X-Complaints-To: usenet@enst.fr NNTP-Posting-Date: Tue, 19 Nov 2002 00:50:03 +0000 (UTC) Return-Path: X-Mailer: Mozilla 4.77 [en] (X11; U; Linux 2.2.19-4.3mdk i686) X-Accept-Language: en Errors-To: comp.lang.ada-admin@ada.eu.org X-BeenThere: comp.lang.ada@ada.eu.org X-Mailman-Version: 2.0.13 Precedence: bulk List-Unsubscribe: , List-Id: comp.lang.ada mail<->news gateway List-Post: List-Help: List-Subscribe: , Errors-To: comp.lang.ada-admin@ada.eu.org X-BeenThere: comp.lang.ada@ada.eu.org Xref: archiver1.google.com comp.lang.ada:31077 Date: 2002-11-18T18:44:49-06:00 Hi, 1) Stephen Leake > Try reading the number from the string using Ada.Text_IO.*. 2) "David C. Hoos" > If that's OK, then if calling Long_Float'Value doesn't > raise Constraint_Error, then the string is a valid > decimal representation of a number. OR, 3) Tokenize the string separating on spaces and use the Ada.Characters.Handling package ... function Is_Control (Item : in Character) return Boolean; function Is_Graphic (Item : in Character) return Boolean; function Is_Letter (Item : in Character) return Boolean; function Is_Lower (Item : in Character) return Boolean; function Is_Upper (Item : in Character) return Boolean; function Is_Basic (Item : in Character) return Boolean; function Is_Digit (Item : in Character) return Boolean; function Is_Decimal_Digit (Item : in Character) return Boolean renames Is_Digit; function Is_Hexadecimal_Digit (Item : in Character) return Boolean; function Is_Alphanumeric (Item : in Character) return Boolean; function Is_Special (Item : in Character) return Boolean; ... yes, time consuming, boring and not "sexy" but better, IMO, than using exception routines for predictable error circumstances. -- ------------------------------------- -- Merge vertically for real address ------------------------------------- s n p @ t . o k i e k c c m -------------------------------------