Bin.to_nat: def of bend-lawful-stdlib@0.1.0.0
Import: import bend-lawful-stdlib@0.1.0.0/src/float/bin.bend as Bin
Lines 237-244 of bend-lawful-stdlib@0.1.0.0/src/float/bin.bend: https://jend.leeeet.dev/read.txt?path=bend-lawful-stdlib@0.1.0.0/src/float/bin.bend&start_line=237&end_line=244

import Base

def to_nat(a: Bin) -> Nat:
  match a:
    case BZ{}:
      0n
    case B0{r}:
      Nat.double(to_nat(r))
    case B1{r}:
      1n+Nat.double(to_nat(r))

Uses (3):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.double
  https://jend.leeeet.dev/definition.txt?path=bend-lawful-stdlib@0.1.0.0/src/float/bin.bend&name=Bin