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  1. #include <iostream>
  2. #include <typeinfo>
  3. using std::cout;
  4.  
  5. // проверяю написанное в https://h...content-available-to-author-only...r.com/post/322132/
  6. // (часть Сжатие ссылок и универсальные ссылки)
  7.  
  8. template<typename T>
  9. void tester(T&)
  10. {
  11.   cout << "tester(" << typeid(T).name() << "&):\n\tlvalue reference - " << std::boolalpha <<
  12.     std::is_lvalue_reference<T>::value << "\n\trvalue reference - " << std::is_rvalue_reference<T>::value << '\n';
  13. }
  14.  
  15. template<typename T>
  16. void tester(T&&)
  17. {
  18.   cout << "tester(" << typeid(T).name() << "&&):\n\tlvalue reference - " << std::boolalpha <<
  19.     std::is_lvalue_reference<T>::value << "\n\trvalue reference - " << std::is_rvalue_reference<T>::value << '\n';
  20. }
  21.  
  22. class T{};
  23.  
  24. void tests()
  25. {
  26.   T value{};
  27.   T& ref{ value};
  28.   cout << "Testing lvalue reference.\t";	tester(ref);	tester<T>(value);
  29.   cout << "Testing rvalue reference.\t";	tester(T{});	tester<T>(T{});
  30.   cout << "Testing incomperhensible stuff.\t";	tester(value);	tester<T&>(value);
  31. }
  32.  
  33.  
  34. int main() 
  35. {
  36.   tests();
  37.   return 0;
  38. }
Success #stdin #stdout 0s 4536KB
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stdin
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Standard input is empty
stdout
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Testing lvalue reference.	tester(1T&):
	lvalue reference - false
	rvalue reference - false
tester(1T&):
	lvalue reference - false
	rvalue reference - false
Testing rvalue reference.	tester(1T&&):
	lvalue reference - false
	rvalue reference - false
tester(1T&&):
	lvalue reference - false
	rvalue reference - false
Testing incomperhensible stuff.	tester(1T&):
	lvalue reference - false
	rvalue reference - false
tester(1T&):
	lvalue reference - true
	rvalue reference - false
https://ideone.com/PL0ukW
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
secret

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