CursorCleanupPolicy.combine: def of mylsm-lsm-store@0.6.0.1
Import: import mylsm-lsm-store@0.6.0.1/src/scan/CursorCleanupPolicy.bend as CursorCleanupPolicy
Lines 3-12 of mylsm-lsm-store@0.6.0.1/src/scan/CursorCleanupPolicy.bend: https://jend.leeeet.dev/read.txt?path=mylsm-lsm-store@0.6.0.1/src/scan/CursorCleanupPolicy.bend&start_line=3&end_line=12

import Base

# Preserves the first cleanup failure and otherwise returns the final result.
def combine(
  a,
  -E: Kind(a),
  first: Result<a, &1, E, Unit>,
  second: Result<a, &1, E, Unit>
) -> Result<a, &1, E, Unit>:
  match first:
    case Fail{error}: Fail{error}
    case Done{Unit{}}: second

Uses (2):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Result
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Unit