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  1. #include <iostream>
  2.  
  3. struct TestData {
  4. 	friend bool operator < (const TestData&, const TestData&);
  5. 	TestData(int keyField) : keyField_(keyField) {}
  6. private:
  7. 	int keyField_;
  8. };
  9.  
  10. bool operator < (const TestData& lhs, const TestData& rhs)
  11. {
  12. 	return lhs.keyField_ < rhs.keyField_;
  13. }
  14.  
  15. int main() {
  16. 	TestData a{1}, b{2};
  17. 	std::cout << (a < b) << '\n';
  18. 	return 0;
  19. }
Success #stdin #stdout 0s 3460KB
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https://ideone.com/Y7JGCD
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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