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From: David Bremner <david@tethera.net>
To: notmuch@notmuchmail.org
Subject: library prefix / field processor cleanup
Date: Sat, 28 Jan 2017 09:15:19 -0400
Message-Id: <20170128131521.26414-1-david@tethera.net>
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I started trying to generalize the regexp stuff to include
message-ids [1], but didn't get that far.  I think both of these patches
are defensible on their own, particularly the second. I'll probably
include something like them in a revised series for regexp searching.

Probably we should use more of the the "release()" style memory
management with Xapian; I didn't follow that up yet as I didn't want
to get _too_ distracted from current goal.


[1]: the complication is that message-ids are boolean fields, while
     from and subject are probabilistic. It's not insurmountable, but it
     did inspire re-thinking the way query fields are initialized.