pub fn swap<T>(x: &mut T, y: &mut T)
Swap the values at two mutable locations of the same type, without deinitialising or copying either one.
Prefix searches with a type followed by a colon (e.g.
fn:) to restrict the search to a given type.
Accepted types are: fn, mod,
struct (or str), enum,
trait, typedef (or
tdef).