BinaryHeap.grown: def of bend-collections@1.0.0.0
Import: import bend-collections@1.0.0.0/src/containers/binary_heap.bend as BinaryHeap
Lines 213-216 of bend-collections@1.0.0.0/src/containers/binary_heap.bend: https://jend.leeeet.dev/read.txt?path=bend-collections@1.0.0.0/src/containers/binary_heap.bend&start_line=213&end_line=216

import Base

# Doubling: the old block becomes the lower half of a block one level deeper,
# so every element keeps its index.
def grown(~A: Data, +depth: Nat, arr: Array<Maybe<&2, A>>) -> Array<Maybe<&2, A>>:
  ANode{arr, empty_slots(~A, depth)}

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Array
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/containers/binary_heap.bend&name=empty_slots