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  1. #include <iostream>
  2.  
  3. template <typename T>
  4. struct Base
  5. {
  6.     using Type = int;
  7. };
  8.  
  9. template <typename T>
  10. struct intermediate : Base<T>
  11. {
  12. 	// using Type = typename intermediate<T>::Type; // Not needed
  13. };
  14.  
  15. template <typename T>
  16. struct Derived : intermediate<T>
  17. {
  18.     using Type =  intermediate<T>::Type;
  19. };
  20.  
  21. int main()
  22. {
  23.     Derived<void>::Type b = 1;
  24.     std::cout << b << std::endl;
  25. }
Compilation error #stdin compilation error #stdout 0s 16064KB
comments (?)
stdin
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Standard input is empty
compilation info 
prog.cpp:18:19: error: need ‘typename’ before ‘intermediate<T>::Type’ because ‘intermediate<T>’ is a dependent scope
     using Type =  intermediate<T>::Type;
                   ^~~~~~~~~~~~~~~
stdout
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Standard output is empty
https://ideone.com/qaHnBw
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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