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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. template <typename T> auto f(T x) -> decltype(x*x)
  6. {
  7.   return x * x;
  8. }
  9.  
  10. template <typename T> T g(T x)
  11. {
  12.   return x * x;
  13. }
  14.  
  15. template <typename F> void test(F f)
  16. {
  17. 	auto a = f(32);
  18. 	auto b = f(' ');
  19. 	auto c = f(2000000000L);
  20.  
  21. 	cout << a << ' ' << b << ' ' << c << endl;
  22. }
  23.  
  24. int main()
  25. {
  26. 	test([](auto x) { return f(x); });
  27. 	test([](auto x) { return g(x); });
  28.  
  29. 	return 0;
  30. }
Success #stdin #stdout 0s 3468KB
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stdin 
Standard input is empty
stdout 
1024 1024 -1651507200
1024  -1651507200
https://ideone.com/F8bJ5c
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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