7 template<typename Signature> class function;
28 class function<R (Args...)> {  class
31   function() : invoker (0) { }  in function()  function in function
32   function(const function& other) : invoker(0) {   in function()  function in function
37   template<typename F> function(const F& f) : invoker(0) {  in function()  function in function
41   ~function() {   in ~function()
46   function& operator=(const function& other) {   in operator =()
47     function(other).swap(*this);   in operator =()
52   function& operator=(const F& f) {  in operator =()
53     function(f).swap(*this);   in operator =()
57   void swap(function& other) {   in swap()
79   function<int(int, int)> f2a;  in test_function()
80   function<int(int, int)> f2b = add<int>();  in test_function()
81   function<int(int, int)> f2c = add<float>();  in test_function()
82   function<int(int, int)> f2d(f2b);  in test_function()
83   function<int(int, int)> f2e = &add_ints;  in test_function()