bug#4835: 23.1; Improper `Invalid face reference' messages. Performance degraded.

[Chong Yidong]

"Drew Adams" <drew.adams@oracle.com> writes:

> Why is it necessary to restrict the function to a symbol - why disallow lambda
> forms? IOW, why can't we use (functionp keywords) instead of (fboundp 
> keywords)?

In principle, I don't see why matchers can't be lambda expressions.  The
main concern I have is that other parts of font lock might have subtle
assumptions about the matcher being a function name.  It seems easier to
make this implicit assumption an explicit one.