(C++) std::unique_ptr

std::unique_ptr is an C++0x STL uncopyable smart pointer.


#include <cassert>

#include <memory>



struct Test { int m_x; };



int main()

{

  {

    std::unique_ptr<Test> p; //Uninitialized pointer

    //assert(p);  //Good: uninitialized pointer is detected

    //p->m_x = 3; //Bad: results in an access violation

  }

  {

    std::unique_ptr<Test> p(new Test);

    p->m_x = 3; //OK

  }

  {

    std::unique_ptr<Test> p;

    p.reset(new Test);

    p->m_x = 3; //OK

  }

  {

    std::unique_ptr<Test> p(new Test);

    //std::unique_ptr<Test> q(p); //std::unique_ptr cannot be copied

  }

}

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