#!/usr/bin/ruby

#
## http://rosettacode.org/wiki/Generic_swap#Sidef
#

func swap_1(Ref a, Ref b) {
    var tmp = *a;
    *a = *b;
    *b = tmp;
}

func swap_2(Ref a, Ref b) {
    (*a, *b) = (*b, *a);
}

var (a, b) = ([1], [2]);
swap_1(\a, \b);
assert_eq(a, [2]);
assert_eq(b, [1]);

swap_2(\b, \a);
assert_eq(a, [1]);
assert_eq(b, [2]);

say "** Test passed!";
