测试functional的bind以及相关功能

注：在VS2010 UPDATE1下测试通过

 /*测试functional的bind以及相关功能*/

 #include <iostream>
 #include <functional>

 using namespace std;
 using namespace std::placeholders;

 int TestAdd(int a, int b)
 {
     return a+b;
 }
 bool TestCompare(int a, int b)
 {
     return a<b;
 }
 class TestBindClass
 {
 public:
     bool operator() (const int &a, const int &b) const
     {
         cout << a << "<" << b << " ? " << ( a<b ? "true" : "false" ) << endl;
         return a<b;
     }
     typedef int first_argument_type;
     typedef int second_argument_type;
     typedef bool result_type;
 };
 template <class T> struct greater1
 {
     bool operator() (const T& x, const T& y) const
     {
         cout << x << ">" << y << " ? " << ( x>y ? "true" : "false" ) << endl;
         return x>y;
     }
     //void operator() (const T& a, const T& b) const {cout << "a<b ? " << ( a<b ? "true" : "false" ) << endl;}
     typedef T first_argument_type;
     typedef T second_argument_type;
     typedef bool result_type;
 };

 void main()
 {
     //test bind function
     auto fcn1 = bind(TestAdd, , );
     cout << fcn1() << endl;

     //test bind function
     auto fcn2 = bind(TestCompare, _1, );
     cout << fcn2() << endl;

     //test binder1st function
     binder1st<greater1<int>> fcn4(greater1<int>(), );
     cout << fcn4() << endl;

     //test binder1st function
     binder1st<TestBindClass> fcn3(TestBindClass(), );
     cout << fcn3() << endl;
 }