Hi, Jon.
On Thu, Sep 05, 2013 at 10:14:16PM -0700, Jon Dufresne wrote:
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"))
---
Thanks for any help.
Not what you asked, but as a suggestion, you might want to use the CC
Mode macros which deal with text properties on single characters. For
example, you could have used `c-put-char-property' instead of
`put-text-property'.
This has the following pros/cons: (i) these macros are slightly less
cumbersome to use, since they take only a single position parameter; (ii)
They also work in XEmacs; (iii) there is some effort involved in learning
about them and how they work.
If you're interested, search cc-defs.el for
Macros/functions to handle so-called "char properties",
and read the definitions in that page.