Fixed.ones4: def of bend-collections-laws-math@1.0.0.0
Import: import bend-collections-laws-math@1.0.0.0/src/math/fixed.bend as Fixed
Lines 168-204 of bend-collections-laws-math@1.0.0.0/src/math/fixed.bend: https://jend.leeeet.dev/read.txt?path=bend-collections-laws-math@1.0.0.0/src/math/fixed.bend&start_line=168&end_line=204

import Base

# the 1 bits of a value below 16
def ones4(+n: Nat) -> Nat:
  match n:
    case 0n:
      0n
    case 1n:
      1n
    case 2n:
      1n
    case 3n:
      2n
    case 4n:
      1n
    case 5n:
      2n
    case 6n:
      2n
    case 7n:
      3n
    case 8n:
      1n
    case 9n:
      2n
    case 10n:
      2n
    case 11n:
      3n
    case 12n:
      2n
    case 13n:
      3n
    case 14n:
      3n
    case 15n:
      4n
    case 16n+m:
      0n

Uses (1):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat