From: Jon Dufresne <jon.dufresne@gmail.com>
To: emacs-devel@gnu.org
Subject: c-mode syntax strings and regexp word boundaries
Date: Thu, 5 Sep 2013 22:14:16 -0700 [thread overview]
Message-ID: <CADhq2b5kSexzU4ec-qcjFpEPLcRO96=eKvqYyQH3wmkp1BhgvA@mail.gmail.com> (raw)
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Hi,
I am trying to modify a major mode derived from c-mode. I am adding support
for an alternative string syntax (PHP heredoc). To do this I am using
"syntax-propertize-function" and
"syntax-propertize-extend-region-functions". (As an aside I am not sure
this is the best approach, but it is best I have come up with so far.)
When trying to extend the propertize region, a regexp fails, but I am not
clear as to why. I have isolated the problem with the following test case.
---
(with-temp-buffer
(c-mode)
(insert "END;\n")
(goto-char (point-min))
(message "Search forward first time")
(re-search-forward "^END\\b")
(put-text-property (1- (point)) (point)
'syntax-table (string-to-syntax "|"))
(goto-char (point-min))
(message "Search forward second time")
(re-search-forward "^END\\b"))
---
Running this give me the output:
Search forward first time
Search forward second time
Search failed: "^END\\b"
I do not understand why the second regexp fails. I suppose it has to do
with the text property string boundary. What is the correct way to look for
the boundary in this case?
Thanks for any help.
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next reply other threads:[~2013-09-06 5:14 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-06 5:14 Jon Dufresne [this message]
2013-09-06 12:21 ` c-mode syntax strings and regexp word boundaries Andreas Röhler
2013-09-06 14:07 ` Stefan Monnier
2013-09-06 14:55 ` Jon Dufresne
2013-09-06 15:44 ` Stefan Monnier
2013-09-06 17:04 ` Jon Dufresne
2013-09-06 20:19 ` Alan Mackenzie
2013-09-06 22:38 ` Jon Dufresne
2013-09-11 8:57 ` Andreas Röhler
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