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  1. #include <iostream>
  2.  
  3. typedef double Func (double);
  4.  
  5. double add_one (double x)
  6. {
  7.     return x+1;
  8. }
  9.  
  10. template <Func Instance>
  11. struct test_type
  12. {
  13.     double operator() (double x)
  14.     {
  15.         return Instance (x);
  16.     }
  17. };
  18.  
  19. int main ()
  20. {
  21.     test_type<add_one> test;
  22.  
  23.     std::cout << test(10.0) << "\n";
  24.  
  25.     return 0;
  26. }
Success #stdin #stdout 0s 3340KB
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https://ideone.com/WEXcMI
language:
C++14 (gcc 8.3)
created:
12 years ago
visibility:
public

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