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  1. #include <iostream>
  2. #include <functional>
  3. using namespace std;
  4.  
  5. struct Block {
  6. 	function<int()> callback;
  7. };
  8.  
  9. void set_callback(Block &block) {
  10. 	int x = 1;
  11. 	int y = 2;
  12.  
  13. 	block.callback = [x=std::move(x), y=std::move(y)] {
  14. 		return x + y;
  15. 	};
  16. }
  17.  
  18. void run_callback(const Block &block) {
  19. 	cout << "result: " << block.callback() << endl;
  20. }
  21.  
  22. int main() {
  23.  
  24. 	Block block;
  25.  
  26. 	set_callback(block);
  27.  
  28. 	run_callback(block);
  29.  
  30. 	return 0;
  31. }
Success #stdin #stdout 0s 3232KB
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Standard input is empty
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result: 3
https://ideone.com/8nIW4F
Closure storage
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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