* Change the semantic of Index::create_in_dir.
It should return an error if the directory already contains an Index.
* Index::open_or_create is working
* additional test
* Checking that schema matches on open_or_create.
Simplifying unit tests.
* simplifying Eq
* A working version
* optimize the ngram parsing
* Decoding codepoint only once.
* Closes#429
* using leading_zeros to make code less cryptic
* lookup in a table
* Compute space usage of a Searcher / SegmentReader / CompositeFile
* Fix typo
* Add serde Serialize/Deserialize for all the SpaceUsage structs
* Fix indexing
* Public methods for consuming space usage information
* #281: Add a space usage method that takes a SegmentComponent to support code that is unaware of particular segment components, and to make it more likely to update methods when a new component type is added.
* Add support for space usage computation of positions skip index file (#281)
* Add some tests for space usage computation (#281)
* Make TopCollector generic
Make TopCollector take a generic type instead of only being tied to
score. This will allow for sharing code between a TopCollector that
sorts results by Score and a TopCollector that sorts documents by a fast
field. This commit makes no functional changes to TopCollector.
* Add TopFieldCollector and TopScoreCollector
Create two new collectors that use the refactored TopCollector.
TopFieldCollector has the same functionality that TopCollector
originally had. TopFieldCollector allows for sorting results by a given
fast field. Closestantivy-search/tantivy#388
* Make TopCollector private
Make TopCollector package private and export TopFieldCollector as
TopCollector to maintain backwards compatibility. Mark TopCollector
as deprecated to encourage use of the non-aliased TopFieldCollector.
Remove Collector implementation for TopCollector since it is not longer
used.
