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  1. #include <iostream>
  2. #include <functional>
  3.  
  4. using namespace std;
  5.  
  6. class Me {};
  7.  
  8. using TGetter   = std::function<std::string( Me* )>;
  9.  
  10. std::string getter( Me* me )
  11. {
  12.   return std::string( "string" );
  13. }
  14.  
  15.     template<typename TGetter>
  16.     class Handler
  17.     {
  18.  
  19.     public:
  20.       using TValue =  typename TGetter::result_type;
  21.       Handler( TGetter getter ) :m_getter( getter ) {}
  22.       TValue get()
  23.       {
  24.         Me m;
  25.         return m_getter( &m );
  26.       }
  27.  
  28.     private:
  29.       TGetter m_getter;
  30.     };
  31.  
  32.     int main()
  33.     {
  34.       using MyHanlder = Handler<TGetter>;
  35.       MyHanlder h(getter);
  36.       MyHanlder::TValue s = h.get();
  37.       cout << s;
  38.     }
Success #stdin #stdout 0s 4516KB
comments (?)
stdin 
Standard input is empty
stdout 
string
https://ideone.com/BqGhPp
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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