Re: Determining existence of text following point

[Christopher Dimech]

> Sent: Wednesday, May 19, 2021 at 12:02 AM
> From: tomas@tuxteam.de
> To: "Christopher Dimech" <dimech@gmx.com>
> Cc: help-gnu-emacs@gnu.org
> Subject: Re: Determining existence of text following point
>
> On Tue, May 18, 2021 at 01:26:12PM +0200, Christopher Dimech wrote:
>
> [...]
>
> > > On Tue, May 18, 2021 at 12:08:42PM +0200, Christopher Dimech wrote:
> > > > How is it that the following returns nil?
> > > >
> > > > (setq sa (string-match "[^[:blank:]]" "     "))
> > >
> > > Because you stated to match any non-blank character and there
> > > are only blank characters to match.
> >
> > The docstring for string-match is
> >
> > "Return index of start of first match for REGEXP in STRING, or nil."
> >
> > I find the description different from what string-match actually returns.
>
> ?

string-match looks as though it returns the index of the last match because

(setq sa (string-match "[^[:blank:]]" "  A neutrino is a fermion"))
(setq sb (not (string-match "[^[:blank:]]" "  A neutrino is a fermion")))

gives

sa: 2
sb: nil


> Cheers
>  - t
>