enum C {
  a(1, 2, z: 3),
  b(z: 3, 1, 2),
  c(1, z: 3, 2),
  d.named1(1, 2, 3),
  e.named2(1, 2, 3),
  f.named3(1, 2, 3),
  ;

  final String log;
  const C(int x, int y, {int z = 42}) : this.log = "x=$x, y=$y, z=$z";
  const C.named1(int x, int y, int z) : this(x, y, z: z);
  const C.named2(int x, int y, int z) : this(x, z: z, y);
  const C.named3(int x, int y, int z) : this(z: z, x, y);
}

main() {}
expect(expected, actual) {}