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  1. #include <cstdio>
  2.  
  3. template<typename T> struct hi { };
  4. template<typename T> struct bye { };
  5.  
  6. template<typename T>
  7. struct Foo
  8. {
  9. 	struct Inner {
  10. 		template<typename U>
  11. 		void hi() { std::printf("hi!\n"); }
  12.  
  13. 		void bye() { std::printf("bye!\n"); }
  14. 	};
  15.  
  16. 	void sayStuff()
  17. 	{
  18. 		Inner i;
  19. 		i.template hi<T>();
  20. 		i.bye();
  21. 	}
  22. };
  23.  
  24.  
  25. int main() {
  26. 	Foo<int> f;
  27. 	f.sayStuff();
  28. 	return 0;
  29. }
Compilation error #stdin compilation error #stdout 0s 3140KB
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stdin
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Standard input is empty
compilation info 
prog.cpp: In member function 'void Foo<T>::sayStuff()':
prog.cpp:19:5: error: invalid use of 'struct hi<T>'
   i.template hi<T>();
     ^
stdout
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Standard output is empty
https://ideone.com/3fbQ0a
language:
C++ (gcc 8.3)
created:
9 years ago
visibility:
public

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