From: Janne Nykopp <newcup@peruna.fi>
To: help-gnu-emacs@gnu.org
Subject: Regexp search: syntax class for comment starter (\s<) does not work consistently in all modes
Date: Fri, 27 Sep 2019 23:22:11 +0300 [thread overview]
Message-ID: <20190927202211.3onie75t3ydknsmb@peruna.fi> (raw)
Hello!
Seems that regexp search for comment starter syntax class, \s<,
doesn't work out of the box in C, C++, Java, javascript (neither for
// or /* comment styles), or pascal ((*), ada or sql (--) modes, for
instance.
It does work out of the box in e.g. lisp (;) - but not for the
two-character comment delimiter (#|), sh (#), fortran (C and !),
postscript ps-mode (%), DOS batch bat-mode (:: and REM), HTML mode
(<!--) ...
I find this strange, because e.g. bat-mode's or html-mode's syntax
specifications (C-h s) don't say anything about comments. On the other
hand, C and the other modes have syntax specifications filled with
detailed comment syntax information. Hence, I'd expect it to be
vice-versa, that \s< wouldn't work in bat-mode but would in c-mode.
I tested with freshly compiled emacs-24.5, 25.3 and 26.3, launching
them with emacs -q -Q. They all seem to behave identically.
I'm wondering whether it's a known and accepted issue that comment
starter syntax class regexp search doesn't quite work in all modes?
Best regards,
Janne Nykopp
next reply other threads:[~2019-09-27 20:22 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-27 20:22 Janne Nykopp [this message]
2019-09-27 21:32 ` Regexp search: syntax class for comment starter (\s<) does not work consistently in all modes Stefan Monnier
2019-10-01 20:08 ` Janne Nykopp
2019-10-02 1:44 ` Stefan Monnier
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