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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. #define FWD(a) std::forward<decltype(a)>(a)
  5. void foo(int& a) { cout << "lref" << endl; }
  6. void foo(const int& a) { cout << "cref" << endl; }
  7. void foo(int&& a) { cout << "rref" << endl; }
  8.  
  9. template <typename T>
  10. void call_foo(T&& t) { foo(FWD(t)); }
  11.  
  12.  
  13. int main() {
  14. 	int a = 10;
  15. 	call_foo(10); // 3) prints cref
  16.     call_foo(a);  // 4) prints cref
  17. 	return 0;
  18. }
Success #stdin #stdout 0s 3096KB
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Standard input is empty
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rref
lref
https://ideone.com/ZKHegx
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
secret

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