Myers.hw_start: def of bend-edit-distance@0.2.2.0
Import: import bend-edit-distance@0.2.2.0/src/Myers.bend as Myers
Lines 582-589 of bend-edit-distance@0.2.2.0/src/Myers.bend: https://jend.leeeet.dev/read.txt?path=bend-edit-distance@0.2.2.0/src/Myers.bend&start_line=582&end_line=589

import Base
import bend-edit-distance@0.2.2.0/EdlibTypes.bend as E
import bend-edit-distance@0.2.2.0/src/Alignment.bend as A

# Edlib selects the LAST optimal reverse-SHW end, hence the earliest start
# for each forward end. Preserve the special forward end -1 with start 0.
def hw_start(+end: Nat, reverse_location: A.Location) -> A.Location:
  match reverse_location:
    case A.Location{E.BeforeStart{}, _}:
      A.Location{E.Position{end}, 1n+end}
    case A.Location{E.Position{reverse_end}, _}:
      A.Location{E.Position{end}, Nat.sub(end, reverse_end)}

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.sub
  https://jend.leeeet.dev/definition.txt?path=bend-edit-distance@0.2.2.0/EdlibTypes.bend&name=Coordinate
  https://jend.leeeet.dev/definition.txt?path=bend-edit-distance@0.2.2.0/src/Alignment.bend&name=Location