bug#11841: 24.1; emacs hangs when opening cpp file with mixed eol styles

[Stefan Monnier]

>> > Just as an observation, (forward-comment -1) doesn't move back over a ^M.
>> 
>> Why should it?  It's not a whitespace, and while it has "comment end"
>> syntax, it does not have a matching comment-start.
>> 
>> I think you should give it whitespace syntax.
>> Currently "foo // bar ^M baz ^J" is treated in CC-mode as "foo <comment>
>> baz", which I think is wrong.

> Perhaps so, but in the file in question you have ^M^J with northing
> between them.  So a lone ^M is not an issue here.

Yes it is: without a "//" in front of it, a ^M is not a comment-ender
and syntax.c then treats it as a "strange char" (for \n used as comment
ender, syntax.c knows to treat it as whitespace when there's no
matching comment-starter, but that's a special case, for other chars
this is not so, e.g. for pascal's } it would be wrong to treat it as
whitespace).


        Stefan