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#include <iostream>
#include <vector>
using namespace std;
 
template <typename Q> std::wstring ToString(const Q& q) {
	return L"Original";
}
template<typename E> std::wstring ToString(const std::vector<E>& t) {
	return L"overload";
}
 
int main() {
	vector<int> v = {1, 3};
	int i = 1;
	cout << ToString(v) << endl;
	cout << ToString(i) << endl;
	return 0;
}

prog.cpp: In function 'int main()':
prog.cpp:15:20: error: cannot bind 'std::ostream {aka std::basic_ostream<char>}' lvalue to 'std::basic_ostream<char>&&'
  cout << ToString(v) << endl;
                    ^
In file included from /usr/include/c++/4.9/iostream:39:0,
                 from prog.cpp:1:
/usr/include/c++/4.9/ostream:602:5: note: initializing argument 1 of 'std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&&, const _Tp&) [with _CharT = char; _Traits = std::char_traits<char>; _Tp = std::basic_string<wchar_t>]'
     operator<<(basic_ostream<_CharT, _Traits>&& __os, const _Tp& __x)
     ^
prog.cpp:16:20: error: cannot bind 'std::ostream {aka std::basic_ostream<char>}' lvalue to 'std::basic_ostream<char>&&'
  cout << ToString(i) << endl;
                    ^
In file included from /usr/include/c++/4.9/iostream:39:0,
                 from prog.cpp:1:
/usr/include/c++/4.9/ostream:602:5: note: initializing argument 1 of 'std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&&, const _Tp&) [with _CharT = char; _Traits = std::char_traits<char>; _Tp = std::basic_string<wchar_t>]'
     operator<<(basic_ostream<_CharT, _Traits>&& __os, const _Tp& __x)
     ^

Standard output is empty