[ruby-core:17678] Re: [PATCH] ruby-mode.el: Fix here-doc strings with inner quotes

It was designed to fix the following case:

<<FOO
"
FOO
bar

where "bar" is wrongly highlighted in font-lock-string-face. It also 
fixes the following case:

<<FOO
<<BAR
BAR
FOO

in which FOO is *not* highlighted in font-lock-string-face when it 
should be.

I've attached a modified version that works with the case you pointed out.

Yukihiro Matsumoto wrote:
> In message "Re: [ruby-core:17615] [PATCH] ruby-mode.el: Fix here-doc strings with inner quotes"
>     on Sat, 5 Jul 2008 17:57:32 +0900, Nathan Weizenbaum <[e-mail]> writes:
> |
> |[1  <text/plain; ISO-8859-1 (7bit)>]
> |At the moment, ruby-mode.el uses font-lock-keywords as opposed to 
> |font-lock-syntactic-keywords to highlight here-doc strings. This means 
> |that Emacs doesn't actually recognize them as strings, so unbalanced 
> |quotes paint the whole buffer in font-lock-string-face. In addition, it 
> |improperly highlights strings that look like nested heredocs, like the 
> |following:
> |
> |<<FOO
> |<<BAR
> |BAR
> |FOO
> |
> |The attached patch uses font-lock-syntactic-keywords instead, so that 
> |heredocs actually register as strings, so stray quotation marks don't 
> |wreak havoc.
>
> I am not sure what this patch fixes.  But at least, the patched
> version does not work well for the following code:
>
> print <<FOO, <<BAR
> <<BAR
> foo
> FOO
> bar
> BAR
>
> it should highlight here-doc up to the last BAR.
>
> 							matz.
>
>
>