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  1. #include <utility>
  2. #include <new>
  3.  
  4. using std::move;
  5.  
  6. template <typename T>
  7. class container
  8. {
  9. public:
  10.     void add(T const & val)
  11.     {
  12.         obj_.~T();                  // ignore this shit
  13.         new (&obj_) T{val};         // force to use cctor
  14.     }
  15.  
  16.     void add(T && val)
  17.     {
  18.         obj_.~T();
  19.         new (&obj_) T{move(val)};    // force to use mctor
  20.     }
  21.  
  22. private:
  23.     T obj_;
  24. };
  25.  
  26. struct moveable
  27. {
  28.     moveable() = default;
  29.     moveable(moveable const &) = delete;
  30.     moveable(moveable &&) = default;
  31. };
  32.  
  33. int main()
  34. {
  35.     container<moveable> c;
  36.     c.add(moveable{});
  37. }
  38.  
Success #stdin #stdout 0s 3336KB
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https://ideone.com/UiMibZ
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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