#include <sstream>
#include <cassert>
int main()
{
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
{
std::ostringstream ss0(" 123 456");
std::ostringstream ss;
ss = std::move(ss0);
assert(ss.rdbuf() != 0);
assert(ss.good());
assert(ss.str() == " 123 456");
int i = 234;
ss << i << ' ' << 567;;
assert(ss.str() == "234 5676");
}
{
std::wostringstream ss0(L" 123 456");
std::wostringstream ss;
ss = std::move(ss0);
assert(ss.rdbuf() != 0);
assert(ss.good());
assert(ss.str() == L" 123 456");
int i = 234;
ss << i << ' ' << 567;;
assert(ss.str() == L"234 5676");
}
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
}