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  1.  
  2. // regardless of the fact that members are exposed...
  3. template<typename T>
  4. struct TBase {
  5.    typedef T MemberType;
  6.    MemberType baseMember;
  7.    MemberType baseFunction() { return MemberType(); }
  8. };
  9.  
  10.  
  11. template<typename T>
  12. struct TDerived : public TBase<T> {
  13.    // http://w...content-available-to-author-only...t.com/c++-faq-lite/nondependent-name-lookup-members.html
  14.    // tells us to use a `using` declaration.
  15.    using typename TBase<T>::MemberType;
  16.    using TBase<T>::baseFunction;
  17.    using TBase<T>::baseMember;
  18.  
  19.        void useBaseFunction() { 
  20.           // what I want to be able to write:
  21.           baseFunction();
  22.           ++baseMember;
  23.           MemberType t; // error: expected primary-expression
  24.        }
  25. };
  26.  
  27.  
  28. int main(){ 
  29.   TDerived<int> d;
  30.   d.useBaseFunction();
  31. }
Compilation error #stdin compilation error #stdout 0.02s 2720KB
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stdin
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Standard input is empty
compilation info 
prog.cpp: In member function ‘void TDerived<T>::useBaseFunction()’:
prog.cpp:23: error: expected `;' before ‘t’
prog.cpp: In member function ‘void TDerived<T>::useBaseFunction() [with T = int]’:
prog.cpp:30:   instantiated from here
prog.cpp:23: error: expected primary-expression
stdout
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Standard output is empty
https://ideone.com/iUsXKG
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
public

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