Nat.read.if: def of Base
Import: import Base
Lines 2302-2307 of Base/base.bend: https://jend.leeeet.dev/read.txt?path=Base/base.bend&start_line=2302&end_line=2307

import Base

def Nat.read.if(t: String, acc: Nat, d: U32, ok: Bool) -> Maybe<&2, Nat>:
  match ok:
    case True{}:
      Nat.read.go(t, Nat.add(Nat.mul(acc, 10n), U32.to_nat(d)))
    case False{}:
      None{}

Uses (9):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  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=Base/base.bend&name=Nat.add
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.mul
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.read.go
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.to_nat