Re: Font-lock decides function call is function declaration in C+ +

[Alan Mackenzie <acm@muc.de>]

Hi, Chong!

On Fri, Feb 09, 2007 at 04:25:21PM -0500, Chong Yidong wrote:
> Alan Mackenzie <acm@muc.de> writes:

> I think the problem is that when the buffer is in the state

>   foo
>   bar ();

> foo looks like a type, so it is inserted in the cache variable
> c-found-types.

Exactly!  Thanks for that.

> When you add the "()":

>   foo()
>   bar();

> this guess is no longer valid, but foo is not removed from
> c-found-types.  Therefore, when you insert the final ";",

>   foo();
>   bar();

> the call to foo(); is highlighted as though it were a constructor.
> Note that if you do M-: (c-clear-found-types) prior to inserting the
> final ";", the misfontification does not occur.

> I don't know what the Right Fix is, however.

Once a variable has been inserted into c-found-types, it will stay there
almost for ever; it will stay there until re-fontification is done from
BOB (I'm not sure whether or not that also means (point-min) on a
narrowed buffer).  This permanence seems to be the fundamental problem.

To Simon: Sorry about my saying that "M-o M-o will clear the spurious
font-lock-type-face".  It only does that when point is within 16 lines of
BOB.  :-(

I think a solution might be to remove "foo" from c-found-types whenever
text is inserted/deleted in the vicinity of "foo\n bar ();" which
syntactically destroys its status as a type identifier.  I'll need to
think a lot more about this.

-- 
Alan.