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  1. #include <iostream>
  2.  
  3. struct foo1 { };
  4. struct foo2 { typedef int bar; };
  5.  
  6. template<typename T>
  7. void dispatch_impl(...)
  8. {
  9.     std::cout << "default target\n";
  10. }
  11.  
  12. template<typename T>
  13. void dispatch_impl(typename T::bar*)
  14. {
  15.     std::cout << "specialized target\n";
  16. }
  17.  
  18. template<typename T>
  19. void dispatch()
  20. {
  21.     dispatch_impl<T>(0);
  22. }
  23.  
  24. int main()
  25. {
  26.     dispatch<foo1>();
  27.     dispatch<foo2>();
  28. }
Success #stdin #stdout 0s 2928KB
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stdin
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Standard input is empty
stdout
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default target
specialized target
https://ideone.com/6gxtW
language:
C++14 (gcc 8.3)
created:
13 years ago
visibility:
secret

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