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  1.     #include <exception>
  2.     #include <iostream>
  3.     #include <type_traits>
  4.  
  5.     class Moveable {
  6.       static int s_count;
  7.       int m_id;
  8.       const char* m_ptr;
  9.     public:
  10.       Moveable(const char* ptr) : m_id(s_count++), m_ptr(ptr) {
  11.         std::cout << "Moveable(ptr) " << m_id << '\n';
  12.       }
  13.  
  14.       Moveable(Moveable&& rhs) : m_id(s_count++), m_ptr(nullptr) {
  15.         std::cout << "Moveable(&&) " << m_id << " from " << rhs.m_id << '\n';
  16.         std::swap(m_ptr, rhs.m_ptr);
  17.       }
  18.  
  19.       ~Moveable() noexcept(false) {
  20.         std::cout << "Release " << m_id << " m_ptr " << (void*)m_ptr << '\n';
  21.       }
  22.  
  23.       Moveable(Moveable const &) = delete;
  24.       Moveable &operator=(Moveable const &) = delete;
  25.     };
  26.  
  27.     int Moveable::s_count;
  28.  
  29.     int main(int argc, char *argv[]) {
  30.       Moveable moveable{"hello world"};
  31.       Moveable moved{std::move(moveable)};
  32.       Moveable moved_again{std::move(moved)};
  33.     }
  34.  
Success #stdin #stdout 0s 3456KB
comments ()
stdin
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Standard input is empty
stdout
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Moveable(ptr) 0
Moveable(&&) 1 from 0
Moveable(&&) 2 from 1
Release 2 m_ptr 0x8048a26
Release 1 m_ptr 0
Release 0 m_ptr 0
https://ideone.com/WPFdaF
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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