this improvement was started to improve code coverage
but also improves performance and adds support for escaping
escaping:
The following quoted string enumerates the characters which
may be escaped.
"+-=&|><!(){}[]^\"~*?:\\/ "
Note that this list includes space.
In order to escape these characters, they are prefixed with the \
(backslash) character. In all cases, using the escaped version
produces the character itself and is not interpretted by the
lexer.
Two simple examples:
my\ name
Will be interpretted as a single argument to a match query
with the value "my name".
"contains a\" character"
Will be interpretted as a single argument to a phrase query
with the value `contains a " character`.
Performance:
before$ go test -v -run=xxx -bench=BenchmarkLexer
BenchmarkLexer-4 100000 13991 ns/op
PASS
ok github.com/blevesearch/bleve 1.570s
after$ go test -v -run=xxx -bench=BenchmarkLexer
BenchmarkLexer-4 500000 3387 ns/op
PASS
ok github.com/blevesearch/bleve 1.740s
parsing of date ranges in queries no longer consults the
index mapping. it was deteremined that this wasn't very useful
and led to overly complicated query syntax/behavior.
instead, applications get set the datetime parser used for
date range queries with the top-level config QueryDateTimeParser
also, we now support querying date ranges in the query string,
the syntax is:
field:>"date"
>,>=,<,<= operators are supported
the date must be surrounded by quotes
and must parse in the configured date format
sed is used to massage the .go files output from nex and yacc.
However, the -i (in-place) option works slightly differently
between gnu (eg Linux) and bsd (eg OSX) sed.
This change should make it work on both flavours.
