-XAPIAN FIELD PROCESSORS
-=======================
-
-Certain optional features of the notmuch query processor rely on the
-presence of the Xapian field processor API. You can determine if your
-notmuch was built against a sufficiently recent version of Xapian by running
-
-::
-
- % notmuch config get built_with.field_processor
-
-Currently the following features require field processor support:
-
-- non-range date queries, e.g. "date:today"
-- named queries e.g. "query:my_special_query"
-- regular expression searches, e.g. "subject:/^\\[SPAM\\]/"
-- thread subqueries, e.g. "thread:{from:bob}"
-