void swap(array& other) SPROUT_NOEXCEPT_EXPR(SPROUT_NOEXCEPT_EXPR(std::swap(std::declval<T&>(), std::declval<T&>())));
#include <sprout/array.hpp>
#include <sprout/assert.hpp>
using namespace sprout;
auto x = array<int, 10>{{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}};
auto y = array<int, 10>{{10, 9, 8, 7, 6, 5, 4, 3, 2, 1}};
x.swap(y);
SPROUT_ASSERT_MSG(x[0] = 10 && y[0] == 1, "each element are swapped.");