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  1. #include <functional>
  2. #include <iostream>
  3.  
  4.  
  5.     class Test
  6.     {
  7.     public:
  8.           void blah() { std::cout << "BLAH!" << std::endl; }
  9.     };
  10.  
  11.     class Bim
  12.     {
  13.     public:
  14.           void operator()(){ std::cout << "BIM!" << std::endl; }
  15.     };
  16.  
  17.     void boum() { std::cout << "BOUM!" << std::endl; }
  18.  
  19.  
  20. int main()
  21. {
  22.     // store the member function of an object:
  23.     Test test;  
  24.     std::function< void() > callback = std::bind( &Test::blah, test );
  25.     callback();
  26.  
  27.     // store a callable object (by copy)
  28.     callback = Bim{};
  29.     callback();
  30.  
  31.     // store the address of a static funtion
  32.     callback = &boum;
  33.     callback();
  34.  
  35.     // store a copy of a lambda (that is a callable object)
  36.     callback = [&]{ test.blah(); }; // might be clearer than calling std::bind()
  37.     callback();
  38. }
Success #stdin #stdout 0s 3020KB
comments (?)
stdin
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Standard input is empty
stdout
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BLAH!
BIM!
BOUM!
BLAH!
https://ideone.com/T6wVp
language:
C++14 (gcc 8.3)
created:
12 years ago
visibility:
public

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