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//@ run-pass
fn main() {
let (mut a, mut b);
(a, b) = (0, 1);
assert_eq!((a, b), (0, 1));
(b, a) = (a, b);
assert_eq!((a, b), (1, 0));
(a, .., b) = (1, 2);
assert_eq!((a, b), (1, 2));
(.., a) = (1, 2);
assert_eq!((a, b), (2, 2));
(..) = (3, 4);
assert_eq!((a, b), (2, 2));
(b, ..) = (5, 6, 7);
assert_eq!(b, 5);
(a, _) = (8, 9);
assert_eq!(a, 8);
// Test for a non-Copy type (String):
let (mut c, mut d);
(c, d) = ("c".to_owned(), "d".to_owned());
assert_eq!(c, "c");
assert_eq!(d, "d");
(d, c) = (c, d);
assert_eq!(c, "d");
assert_eq!(d, "c");
// Test nesting/parentheses:
((a, b)) = (0, 1);
assert_eq!((a, b), (0, 1));
(((a, b)), (c)) = ((2, 3), d);
assert_eq!((a, b), (2, 3));
assert_eq!(c, "c");
((a, .., b), .., (..)) = ((4, 5), ());
assert_eq!((a, b), (4, 5));
}
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