Rational.Rational.add: def of bend-kit-bignum@0.1.0.0
Import: import bend-kit-bignum@0.1.0.0/rational.bend as Rational
Lines 56-60 of bend-kit-bignum@0.1.0.0/rational.bend: https://jend.leeeet.dev/read.txt?path=bend-kit-bignum@0.1.0.0/rational.bend&start_line=56&end_line=60

import Base
import bend-kit-bignum@0.1.0.0/bigint.bend as Big

def Rational.add(a: Rational, b: Rational) -> Rational:
  match a b:
    case Rational{an, +ad} Rational{bn, +bd}:
      Rational.norm(Big.BigInt.add(Big.BigInt.mul(an, bd),
        Big.BigInt.mul(bn, ad)), Big.BigInt.mul(ad, bd))

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=bend-kit-bignum@0.1.0.0/bigint.bend&name=BigInt.add
  https://jend.leeeet.dev/definition.txt?path=bend-kit-bignum@0.1.0.0/bigint.bend&name=BigInt.mul
  https://jend.leeeet.dev/definition.txt?path=bend-kit-bignum@0.1.0.0/rational.bend&name=Rational
  https://jend.leeeet.dev/definition.txt?path=bend-kit-bignum@0.1.0.0/rational.bend&name=Rational.norm