DlistIterator.has_previous: def of bend-collections@1.0.0.0
Import: import bend-collections@1.0.0.0/src/containers/dlist_iterator.bend as DlistIterator
Lines 57-59 of bend-collections@1.0.0.0/src/containers/dlist_iterator.bend: https://jend.leeeet.dev/read.txt?path=bend-collections@1.0.0.0/src/containers/dlist_iterator.bend&start_line=57&end_line=59

import Base

def has_previous(~T: Data, it: Iterator<T>) -> Iterator<T> & Bool:
  IT{s, n, last, f, +i} = it
  (IT{s, n, last, f, i}, Nat.is_lt(0n, i))

Uses (5):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.is_lt
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Pair
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Sigma
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/containers/dlist_iterator.bend&name=Iterator