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  1. #include <vector>
  2. #include <algorithm>
  3. #include <iterator>
  4. #include <iostream>
  5. namespace
  6. {
  7. class placeholder {};
  8. placeholder _1;
  9. }
  10.  
  11. class Test
  12. {
  13. public:
  14.   Test() {}
  15.   Test(const Test& p) {}
  16.   ~Test() {}
  17.   void do_stuff(const std::vector<int>& v)
  18.   {
  19.     std::vector<int>::const_iterator it = v.begin();
  20.     for (; it != v.end(); ++it) {
  21.       std::cout << *it << std::endl;
  22.     }
  23.   }
  24. };
  25.  
  26. class simple_bind_t
  27. {
  28.   typedef void(Test::*fn)(const std::vector<int>&);
  29.   fn fn_;
  30.   Test t_;
  31. public:
  32.   simple_bind_t(fn f, const Test& t): fn_(f), t_(t)
  33.   {
  34.     int i = 0;
  35.   }
  36.   ~simple_bind_t()
  37.   {
  38.     int i = 0;
  39.   }
  40.  
  41.   void operator()(const std::vector<int>& a)
  42.   {
  43.     return (t_.*fn_)(a);
  44.   }
  45. };
  46.  
  47. simple_bind_t simple_bind(void(Test::*fn)(const std::vector<int>&),
  48.                           const Test& t, const placeholder&)
  49. {
  50.   return simple_bind_t(fn, t);
  51. }
  52.  
  53. int main()
  54. {
  55.   Test t;
  56.   //boost::shared_ptr<Test> ptr_test = boost::make_shared<Test>();
  57.   std::vector<int> vec;
  58.   vec.push_back(42);
  59.   simple_bind(&Test::do_stuff, t, _1)(vec); //等同于下面2行代码逻辑
  60.   return 0;
  61. }
Success #stdin #stdout 0s 2872KB
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Standard input is empty
stdout
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42
https://ideone.com/HXe5E4
language:
C++ 4.3.2 (gcc-4.3.2)
created:
7 years ago
visibility:
public

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