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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. template <class T>
  5. struct test1 {
  6. 	enum test2 {
  7. 		test3, test4
  8. 	};
  9. 	friend test2 operator | (test2 f1, test2 f2) {
  10. 		return static_cast<test2>(
  11. 			static_cast<unsigned>(f1) | static_cast<unsigned>(f2)
  12. 		);
  13. 	}
  14. };
  15.  
  16. int main() {
  17. 	test1<int>::test2 flags = test1<int>::test3 | test1<int>::test4;
  18. }
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https://ideone.com/5EKbpB
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
secret

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