apache/lucene-solr — pull request #33 by PaulElschot (2014-02-16 22:45:06+00:00)
Title: LUCENE-5092, 2nd try

In core introduce DocBlocksIterator.
Use this in FixedBitSet, in EliasFanoDocIdSet and in join module ToChild... and ToParent...
Also change BaseDocIdSetTestCase to test DocBlocksIterator.advanceToJustBefore.

This was simplified a lot by LUCENE-5441 and LUCENE-5440.