The Std::bind and function of c++11

• Basic Test Code
• 2. #include<iostream>
  4. #include<functional>
  8. void func(void)
  10. {
  12. std::cout << __FUNCTION__ << std::endl;
  14. }
  18. void callback(std::function<int(int,char*)> fr)
  20. {
  22. fr(1,"gdg");
  24. }
  28. int strlength(int n,constchar* str)
  30. {
  32. return n + strlen(str);
  34. }
  38. void outPut(int x,int y)
  40. {
  42. std::cout << x <<" "<< y << std::endl;
  44. }
  48. int main()
  50. {
  52. //测试bind
  54. auto fr = std::bind(strlength, std::placeholders::_1, std::placeholders::_2);
  58. //function作为函数参数
  60. callback(fr);
  64. std::bind(strlength,1,"hhha")();
  66. STD : bind ( Strlength std :: placeholders : _1 "HHA" 45 //the first parameter is passed out from the outside, the second parameter is already set
  68. STD : bind ( Strlength 23 STD : placeholders : _1 "Lallaa" //bind in the order of the parameters of the function
  70. STD : bind ( Strlength std :: placeholders : _2 STD : placeholders : _1 "HHAFDSF" 25 //the first argument with the passed-in second parameter, the second argument with the first parameter passed in
  72. std::bind(strlength, std::placeholders::_1, std::placeholders::_3)(12,45,"fhsafdf");//对，第二个参数没用到
  78. }

From for notes (Wiz)

The Std::bind and function of c++11