Re: Parent match
I made a somewhat similar patch several years ago. But rather than
adding a grouping operator, my version added a modifier that could be
used with the match operators. Initially, the modifier was % ("percent"
is close to "parent") but that was later changed to <. This would allow
use of patterns like <~P.
An old version of the patch is available from
http://schrab.com/aaron/mutt/.
I know I have a much newer version around somewhere. But it looks like
I've been really bad about keeping my patches page updated.