VisibleCursor.decision.step: def of mylsm-lsm-store@0.6.0.1
Import: import mylsm-lsm-store@0.6.0.1/src/scan/VisibleCursor.bend as VisibleCursor
Lines 241-264 of mylsm-lsm-store@0.6.0.1/src/scan/VisibleCursor.bend: https://jend.leeeet.dev/read.txt?path=mylsm-lsm-store@0.6.0.1/src/scan/VisibleCursor.bend&start_line=241&end_line=264

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/RangeCursor.bend as RangeCursor
import mylsm-lsm-store@0.6.0.1/src/scan/ScanMerge.bend as ScanMerge
import mylsm-lsm-store@0.6.0.1/src/scan/SstCursor.bend as SstCursor

def decision.step(
  decision: ScanMerge.Decision,
  base: Maybe<&1, SstCursor.Cursor>,
  base_entry: ByteMemTable.Entry,
  delta_entry: ByteMemTable.Entry,
  delta_tail: List<&1, ByteMemTable.Entry>,
  bounds: RangeCursor.Bounds
) -> Step:
  match decision:
    case ScanMerge.EmitDelta{}:
      delta.output(delta_entry, base, Some{base_entry}, delta_tail, bounds)
    case ScanMerge.EmitBase{}:
      match base:
        case Some{cursor}:
          Item{base_entry, Active{Some{cursor}, None{},
            Con{delta_entry, delta_tail}, bounds, None{}}}
        case None{}: End{}
    case ScanMerge.EmitBoth{}:
      delta.output(delta_entry, base, None{}, delta_tail, bounds)
    case ScanMerge.SkipDelta{}:
      Skip{Active{base, Some{base_entry}, delta_tail, bounds, None{}}}
    case ScanMerge.SkipBoth{}:
      Skip{Active{base, None{}, delta_tail, bounds, None{}}}
    case ScanMerge.Finished{}: End{}

Uses (9):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=mylsm-lsm-store@0.6.0.1/src/ByteMemTable.bend&name=Entry
  https://jend.leeeet.dev/definition.txt?path=mylsm-lsm-store@0.6.0.1/src/scan/RangeCursor.bend&name=Bounds
  https://jend.leeeet.dev/definition.txt?path=mylsm-lsm-store@0.6.0.1/src/scan/ScanMerge.bend&name=Decision
  https://jend.leeeet.dev/definition.txt?path=mylsm-lsm-store@0.6.0.1/src/scan/SstCursor.bend&name=Cursor
  https://jend.leeeet.dev/definition.txt?path=mylsm-lsm-store@0.6.0.1/src/scan/VisibleCursor.bend&name=Cursor
  https://jend.leeeet.dev/definition.txt?path=mylsm-lsm-store@0.6.0.1/src/scan/VisibleCursor.bend&name=Step
  https://jend.leeeet.dev/definition.txt?path=mylsm-lsm-store@0.6.0.1/src/scan/VisibleCursor.bend&name=delta.output