search for: om_match_nothing

...match the + wildcard "foo*", but bar does exist in the database. Previously, + such queries would be equivalent to "bar". Now, they will match + no documents. + * include/xapian/query.h,api/omqueryinternal.cc,api/omquery.cc: Add + an OM_MATCH_NOTHING query operator, and add a constructor for + nullary query operators (ie, queries with no subqueries). A + query with this operator represents a query which matches no + documents (such as a wildcard query which expands to no terms). + Add support for combining O...