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  1. #include <iostream>
  2. #include <stdio.h>
  3.  
  4. struct SimpleStruct{
  5. 	const size_t i;
  6. 	constexpr SimpleStruct(const size_t i) : i(i) {}
  7. };
  8.  
  9. struct ComplexStructB{
  10. private:
  11. 	const SimpleStruct* const array_;
  12. public:
  13. 	const SimpleStruct& operator[](const size_t index){
  14. 		return array_[index];
  15. 	}
  16. 	constexpr ComplexStructB(const SimpleStruct* const array) : array_(array) {}
  17. };
  18.  
  19. struct ComplexStructA{
  20. private:
  21. 	const ComplexStructB* const array_;
  22. public:
  23. 	const ComplexStructB& operator[](const size_t index){
  24. 		return array_[index];
  25. 	}
  26. 	constexpr ComplexStructA(const ComplexStructB* const array) : array_(array) {}
  27. };
  28.  
  29. SimpleStruct simple = {42};
  30. ComplexStructB complex_b = {&simple};
  31. ComplexStructA complex_a = {&complex_b};
  32.  
  33. int main(void) {
  34.  
  35. 	std::cout << "Simple is " << simple.i << std::endl;
  36. 	std::cout << "Complex B is " << complex_b[0].i << std::endl;
  37.  
  38. 	auto extracted_b = complex_a[0];
  39. 	// Ошибка !
  40. 	std::cout << "Complex A is " << extracted_b[0].i << std::endl;
  41. 	return 0;
  42. }
Success #stdin #stdout 0s 4720KB
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stdin
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Standard input is empty
stdout
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Simple is 42
Complex B is 42
Complex A is 42
https://ideone.com/OCtDMd
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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