SPROUT_CXX14_CONSTEXPR pointer data() SPROUT_NOEXCEPT;
SPROUT_CONSTEXPR const_pointer data() const SPROUT_NOEXCEPT;
#include <sprout/string.hpp>
using namespace sprout;
SPROUT_STATIC_CONSTEXPR auto input = string<8>("homuhomu");
static_assert(input.data()[0] == 'h', "a first element is h.");