def scan.entry.choose

mylsm-lsm-store@0.6.0.1 · src/scan/SstCursor.bend:66

import Base
import mylsm-lsm-store@0.6.0.1/src/ByteMemTable.bend as ByteMemTable
import mylsm-lsm-store@0.6.0.1/src/scan/ByteBlockReader.bend as ByteBlockReader
import bend-kit-bytes@0.3.2.0/bytes.bend as Bytes

66def scan.entry.choose(
67  valid: Bool,
68  key: Bytes.Bytes,
69  value: Bytes.Bytes,
70  cursor: ByteBlockReader.EntryCursor,
71  bounds: Bounds & Bounds
72) -> IO(Step):
73  match valid:
74    case True{}:
75      match bounds:
76        case (item_bounds, _):
77          IO.pure(Step, Item{ByteMemTable.Entry{key, Some{value}},
78            Active{cursor, item_bounds}})
79    case False{}:
80      match bounds:
81        case (_, skip_bounds): IO.pure(Step, Skip{Active{cursor, skip_bounds}})