fork download
copy 
  1. #include <functional>
  2. #include <iostream>
  3. using namespace std;
  4.  
  5. const function<void()>* pointer;
  6.  
  7. void a(const function<void()> & f)
  8. {
  9.     pointer = &f;
  10. }
  11.  
  12. void b()
  13. {
  14.     (*pointer)();
  15. }
  16.  
  17. int main()
  18. {
  19.     int value = 1;
  20.     std::cout << value << std::endl;
  21.  
  22.     // 1: this works    
  23.     function<void()> f = [&] () { std::cout << value << std::endl; };
  24.     a(f);
  25.  
  26.     // 2: this doesn't
  27.     a([&] () { std::cout << value << std::endl; });
  28.     //c();
  29.     char data[1024];
  30.     for (int i = 0; i < 1024; i++)
  31.         data[i] = i % 4; 
  32.  
  33.     b();
  34.  
  35.     return 0;
  36. }
Runtime error #stdin #stdout 0s 3016KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
1
https://ideone.com/AjAWYk
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!