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#include <iostream>
using namespace std;
 
namespace foo {
template<typename T>
void cout (const T& value) {
	std::cout<<value;
}
 
template<typename T, typename... R>
void cout (const T& head, const R&... tail) {
	std::cout << head;
	cout(tail...);
}
}
 
int main() {
	using foo::cout;
	cout(23, endl, 12312, "\n", 12412);
	return 0;
}
 

prog.cpp: In function 'int main()':
prog.cpp:19:35: error: no matching function for call to 'cout(int, <unresolved overloaded function type>, int, const char [2], int)'
  cout(23, endl, 12312, "\n", 12412);
                                   ^
prog.cpp:19:35: note: candidates are:
prog.cpp:6:6: note: template<class T> void foo::cout(const T&)
 void cout (const T& value) {
      ^
prog.cpp:6:6: note:   template argument deduction/substitution failed:
prog.cpp:19:35: note:   candidate expects 1 argument, 5 provided
  cout(23, endl, 12312, "\n", 12412);
                                   ^
prog.cpp:11:6: note: void foo::cout(const T&, const R& ...) [with T = int; R = {}]
 void cout (const T& head, const R&... tail) {
      ^
prog.cpp:11:6: note:   candidate expects 1 argument, 5 provided

Standard output is empty