Myers.band_keep_last: def of bend-edit-distance@0.2.2.0
Import: import bend-edit-distance@0.2.2.0/src/Myers.bend as Myers
Lines 230-237 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=230&end_line=237

import Base

# Edlib's conservative Ukkonen block bounds, rearranged so every term is
# nonnegative Nat arithmetic. Rows/columns here count consumed characters.
# The 62/63 constants adapt 2*WORD_SIZE-2/-1 from the pinned 64-bit code.
def band_keep_last(+score: Nat, bottom: Nat, +maximum: Nat,
                   length: Nat, target_length: Nat, column: Nat) -> Bool:
  Bool.and(Nat.is_lt(score, Nat.add(maximum, 32n)),
    Nat.is_le(Nat.add(Nat.add(bottom, score), target_length),
      Nat.add(Nat.add(Nat.add(maximum, length), column), 63n)))

Uses (6):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.and
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.add
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.is_le
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.is_lt