Sha512.previous: def of bend-collections-laws-crypto@1.0.0.0
Import: import bend-collections-laws-crypto@1.0.0.0/spec/crypto/sha512.bend as Sha512
Lines 202-203 of bend-collections-laws-crypto@1.0.0.0/spec/crypto/sha512.bend: https://jend.leeeet.dev/read.txt?path=bend-collections-laws-crypto@1.0.0.0/spec/crypto/sha512.bend&start_line=202&end_line=203

import Base
import bend-collections-laws-crypto@1.0.0.0/src/crypto/sha512/types.bend as T

def previous(history: List<&2, T.Lane>, lag: Nat) -> T.Lane:
  nth(history, Nat.sub(lag, 1n))

Uses (5):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  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-collections-laws-crypto@1.0.0.0/spec/crypto/sha512.bend&name=nth
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/src/crypto/sha512/types.bend&name=Lane