Re: In-Band Information Considered Harmful

Chip Salzenberg writes:
> I'm glad you asked.  No, I'd define it this way:
>
>    \m{ATTR} -- states that subsequent characters can match iff they
>                have metadata that matches ATTR
>    \M{ATTR} -- s/have/do not have/
I advice to think whether we want to spend a precious char on
negation.  It may be possible to do with (?!), and if the positive
variant is going to be used 99% of time, then probably the negative
variant should be used.

Ilya