From: Stefan Monnier <monnier@iro.umontreal.ca>
To: help-gnu-emacs@gnu.org
Subject: Re: Regexp search: syntax class for comment starter (\s<) does not work consistently in all modes
Date: Tue, 01 Oct 2019 21:44:14 -0400 [thread overview]
Message-ID: <jwvy2y4x70y.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: 20191001200840.6p3fi2wsmnbxacnl@peruna.fi
> by the way, at least in lisp-mode, \s< finds ";"
> inside a string as well).
Indeed, as I said, \s< only denotes those characters which the syntax
tables says "can" start a comment. Whether they do depends on where
they are.
> I'm still pretty confused how bat-mode, for example, works as the
> syntax table doesn't contain < syntax.
There is no single char which starts a comment in bat-mode, since the
comment delimiter is composed of 3 characters ("rem") and only in some
places (e.g. "remember" doesn't count as a comment, even though it
starts with "rem").
Syntax-tables can handle 2-char comment delimiters (which covers
languages like C), and for more complex cases such as bat-mode's you
have to use `syntax-propertize-function` as does
`bat--syntax-propertize` to apply a `<` syntax to those `r` characters
which are part of the magic "rem" sequence.
You might like to read the syntax-tables chapter in the Elisp manual.
Stefan
prev parent reply other threads:[~2019-10-02 1:44 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-27 20:22 Regexp search: syntax class for comment starter (\s<) does not work consistently in all modes Janne Nykopp
2019-09-27 21:32 ` Stefan Monnier
2019-10-01 20:08 ` Janne Nykopp
2019-10-02 1:44 ` Stefan Monnier [this message]
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