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  1. #include <iostream>
  2. #include <functional>
  3. #include <string>
  4.  
  5. class Node
  6. {
  7.     std::function<std::string()> execute;
  8. public:
  9.     Node(std::function<std::string()> _execute)
  10.         : execute(std::move(_execute))
  11.     {
  12.     }
  13.     void output() const
  14.     {
  15.     	std::cout << execute() << '\n';
  16.     }
  17. };
  18.  
  19. std::string f1() { return "f1"; }
  20. struct T { std::string f2() { return "f2"; } };
  21. struct F { std::string operator ()() const { return "f3"; } };
  22.  
  23. int main()
  24. {
  25.     T obj;
  26.  
  27.     Node n1 { f1 };
  28.     Node n2 { std::bind(&T::f2, &obj) };
  29.     Node n3 { F() };
  30.     Node n4 { []() { return std::string("f4"); } };
  31.  
  32. 	n1.output();
  33. 	n2.output();
  34. 	n3.output();
  35. 	n4.output();
  36. }
Success #stdin #stdout 0s 3464KB
comments (?)
stdin 
Standard input is empty
stdout 
f1
f2
f3
f4
https://ideone.com/pDgkuF
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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