Rand.and_bits: def of bend-collections-laws-math@1.0.0.0
Import: import bend-collections-laws-math@1.0.0.0/spec/math/random/rand.bend as Rand
Lines 38-43 of bend-collections-laws-math@1.0.0.0/spec/math/random/rand.bend: https://jend.leeeet.dev/read.txt?path=bend-collections-laws-math@1.0.0.0/spec/math/random/rand.bend&start_line=38&end_line=43

import Base
import bend-collections-laws-math@1.0.0.0/spec/lib/common.bend as C

def and_bits(w: Nat, +a: Nat, +b: Nat) -> Nat:
  match w:
    case 0n:
      0n
    case 1n+k:
      Nat.add(Nat.mul(C.bit(a), C.bit(b)), Nat.double(and_bits(k, C.half(a), C.half(b))))

Uses (6):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.add
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.double
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.mul
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-math@1.0.0.0/spec/lib/common.bend&name=bit
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-math@1.0.0.0/spec/lib/common.bend&name=half