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  1. #include <iostream>
  2. #include <vector>
  3.  
  4. class C {
  5. public:
  6.     void do_whatever() const {}
  7. };
  8.  
  9. template<class T>
  10. const T &apply_helper( const T *t ) { return *t; }
  11.  
  12. template<class T>
  13. typename std::enable_if<!std::is_pointer<T>::value, const T &>::type 
  14. apply_helper( const T &t )  { return t; }
  15.  
  16.  
  17.  
  18. template<class T,typename Func>
  19. void apply( const std::vector<T> &v, Func f )
  20. {
  21.     for( const auto &i : v ) f( apply_helper( i ) );
  22. }
  23.  
  24.  
  25.  
  26. int main() {
  27.     std::vector<C> vc;
  28.     std::vector<C*> vp;
  29.     auto call = []( const C &c ) { c.do_whatever(); };
  30.     apply( vc, call );
  31.     apply( vp, call );
  32.     return 0;
  33. }
Success #stdin #stdout 0s 4492KB
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https://ideone.com/FtaLXn
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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