unofficial mirror of bug-gnu-emacs@gnu.org 
 help / color / mirror / code / Atom feed
From: Ramesh Nedunchezian <rameshnedunchezian@outlook.com>
To: 59531@debbugs.gnu.org
Subject: bug#59531: 29.0.50: An alternative to `string-to-number` which throws an error (or returns a NIL value) when input is non-parseable as number
Date: Thu, 24 Nov 2022 11:44:43 +0530	[thread overview]
Message-ID: <TY2PR0101MB3693F7DD75CC1CCBA0EB9543DA0F9@TY2PR0101MB3693.apcprd01.prod.exchangelabs.com> (raw)

`string-to-number` returns ZERO if the input is not a number.  


This return value is not very helpful.  The choice of a number ZERO as "Not A Number" doesn't help one to distinguish between the following two cases

(1) Input was a valid number, and it parses to number zero

(2) Input was NOT a valid number, and it was forcibly reported as ZERO

Consider amending `string-to-number` to throw an error (or return NIL) when the input is not parseable as a number, or providing an alternative API to validate numbers.  I am trying to parse some fields in an org table, and see if the field value is a number or not;

If there is already an alternative to what I am trying to accomplish, I would appreciate a recipe.








             reply	other threads:[~2022-11-24  6:14 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-11-24  6:14 Ramesh Nedunchezian [this message]
2022-11-24  8:00 ` bug#59531: 29.0.50: An alternative to `string-to-number` which throws an error (or returns a NIL value) when input is non-parseable as number Eli Zaretskii
2022-12-14 16:40   ` Robert Pluim
2022-12-16  6:28     ` Jean Louis
2022-11-24 10:08 ` Jean Louis

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

  List information: https://www.gnu.org/software/emacs/

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=TY2PR0101MB3693F7DD75CC1CCBA0EB9543DA0F9@TY2PR0101MB3693.apcprd01.prod.exchangelabs.com \
    --to=rameshnedunchezian@outlook.com \
    --cc=59531@debbugs.gnu.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
Code repositories for project(s) associated with this public inbox

	https://git.savannah.gnu.org/cgit/emacs.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).