Number.eg_pos: def of bend-collections-laws-math@1.0.0.0
Import: import bend-collections-laws-math@1.0.0.0/spec/math/number.bend as Number
Lines 41-51 of bend-collections-laws-math@1.0.0.0/spec/math/number.bend: https://jend.leeeet.dev/read.txt?path=bend-collections-laws-math@1.0.0.0/spec/math/number.bend&start_line=41&end_line=51

import Base
import bend-collections-laws-math@1.0.0.0/src/math/number.bend as NB

# the signed Bezout identity a*x - b*y == g (neg false) or b*y - a*x == g
# (neg true), stated without subtraction: the positive side equals g plus
# the negative side
def eg_pos(+a: Nat, +b: Nat, r: NB.EGcd) -> Nat:
  match r:
    case NB.EG{g, +x, +y, neg}:
      match neg:
        case True{}:
          Nat.mul(b, y)
        case False{}:
          Nat.mul(a, x)

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  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/src/math/number.bend&name=EGcd