template<typename T, std::size_t N, typename Traits>
inline void
swap(sprout::basic_string<T, N, Traits>& lhs, sprout::basic_string<T, N, Traits>& rhs)
SPROUT_NOEXCEPT_EXPR(SPROUT_NOEXCEPT_EXPR(lhs.swap(rhs)));
#include <sprout/string.hpp>
#include <sprout/assert.hpp>
using namespace sprout;
auto x = string<8>("homuhomu");
auto y = string<8>("madocchi");
swap(x, y);
SPROUT_ASSERT_MSG(x == "madocchi" && y == "homuhomu", "each element are swapped.");