// Package keyspan provides facilities for sorting, fragmenting and // iterating over spans of user keys. // // A Span represents a range of user key space with an inclusive start // key and exclusive end key. A span may hold any number of Keys which are // applied over the entirety of the span's keyspace. // // Spans are used within Pebble as an in-memory representation of range // deletion tombstones, and range key sets, unsets and deletes. Spans // are fragmented at overlapping key boundaries by the Fragmenter type. // This package's various iteration facilities require these // non-overlapping fragmented spans. package keyspan