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#include <iostream>
using namespace std;
template<class S> class Foo;
 
template<class Ret, class Arg, class... Args>
class Foo<Ret(Arg*, Args...)> 
{
public:
	template<class FUNC>
	Foo(FUNC func, int)
	{
		cout << "func" << endl;
	}
	template<class Rett>
	Foo(Rett(Arg::*method)(Args...)) { cout << "fptr" << endl; }
 
};
 
template class Foo<void(int*, int)>;
 
int main()
{
	return 0;
}
 

prog.cpp: In instantiation of 'class Foo<void(int*, int)>':
prog.cpp:19:16:   required from here
prog.cpp:15:2: error: creating pointer to member function of non-class type 'int'
  Foo(Rett(Arg::*method)(Args...)) { cout << "fptr" << endl; }
  ^

Standard output is empty