[patterns] Pattern matching

[Mark Raynsford]

Hello. I'm lagging behind the discussion a little; I've been having
mail delivery issues which are hopefully now corrected.

Could I verify that I have the right branch and commit to build the
patterns prototype?

My working directory:

$ hg branch
patterns

$ hg log -l 1
changeset:   2831:fdecf272d639
branch:      patterns
tag:         tip
parent:      2823:1fd5901544ac
user:        gbierman
date:        Fri Jun 30 16:35:59 2017 +0100
summary:     Initial changes for patterns branch

$ grep -rl __match .
$

The JDK that was built from the above doesn't seem to know anything
about __match or __matches, so I'm assuming that I've somehow not built
the right sources...

M