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  1. #include <iostream>
  2. #include <functional>
  3. #include <string>
  4.  
  5. class StringProxyDemo {
  6. public:
  7. 	class Proxy {
  8. 	public:
  9. 		Proxy(std::string value) : _value(std::move(value)) { }
  10. 		std::string *operator->() { return &_value; }
  11. 	private:
  12. 		std::string _value;
  13. 	};
  14.  
  15. 	Proxy operator->() {
  16. 		return _function();
  17. 	}
  18.  
  19. 	StringProxyDemo(std::function<std::string()> function)
  20. 	: _function(std::move(function)) { }
  21.  
  22. private:
  23. 	std::function<std::string()> _function;
  24. };
  25.  
  26. int main() {
  27. 	StringProxyDemo demo(
  28. 		[]() -> std::string {
  29. 			return "Hello, World!";
  30. 		}
  31. 	);
  32. 	std::cout << demo->size() << std::endl;
  33. 	std::cout << demo->c_str() << std::endl;
  34. }
  35.  
Success #stdin #stdout 0s 16064KB
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Standard input is empty
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13
Hello, World!
https://ideone.com/ZkvUmX
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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