Hmap.HMap.split: def of bend-kit-collections@0.1.4.1
Import: import bend-kit-collections@0.1.4.1/hmap.bend as Hmap
Lines 68-82 of bend-kit-collections@0.1.4.1/hmap.bend: https://jend.leeeet.dev/read.txt?path=bend-kit-collections@0.1.4.1/hmap.bend&start_line=68&end_line=82

import Base

def HMap.split(
  ~K: Data, ~V: Data, ~eq: K -> K -> Bool,
  +n: Nat, +mask: U32, +oldhash: U32, +entries: List<&2, Entry<K, V>>,
  +hash: U32, +k: K, +v: V
) -> HMap<K, V>:
  match n:
    case 0n:
      HLeaf{oldhash, HMap.entries.put(~K, ~V, ~eq, entries, k, v)}
    case 1n+p:
      HMap.bool(HMap<K, V>, U32.is_eq((oldhash .&. mask : U32), (hash .&. mask : U32)),
        u => HMap.bool(HMap<K, V>, U32.is_eq((oldhash .&. mask : U32), 0),
          x => HBranch{HMap.split(~K, ~V, ~eq, p, (mask << 1n : U32), oldhash, entries, hash, k, v), HNil{}},
          x => HBranch{HNil{}, HMap.split(~K, ~V, ~eq, p, (mask << 1n : U32), oldhash, entries, hash, k, v)}),
        u => HMap.split.side(K, V, U32.is_eq((oldhash .&. mask : U32), 0),
          HLeaf{oldhash, entries}, HLeaf{hash, [Entry{k, v}]}))

Uses (12):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  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=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.and
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.is_eq
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.shln
  https://jend.leeeet.dev/definition.txt?path=bend-kit-collections@0.1.4.1/hmap.bend&name=Entry
  https://jend.leeeet.dev/definition.txt?path=bend-kit-collections@0.1.4.1/hmap.bend&name=HMap
  https://jend.leeeet.dev/definition.txt?path=bend-kit-collections@0.1.4.1/hmap.bend&name=HMap.bool
  https://jend.leeeet.dev/definition.txt?path=bend-kit-collections@0.1.4.1/hmap.bend&name=HMap.entries.put
  https://jend.leeeet.dev/definition.txt?path=bend-kit-collections@0.1.4.1/hmap.bend&name=HMap.split.side