Name

namespace boost {

  class bad_weak_ptr: public std::exception;

  template<class T> class weak_ptr;

  template<class T> class shared_ptr {

    public:

      typedef T element_type;

      shared_ptr(); // never throws
      template<class Y> explicit shared_ptr(Y * p);
      template<class Y, class D> shared_ptr(Y * p, D d);
      template<class Y, class D, class A> shared_ptr(Y * p, D d, A a);
      ~shared_ptr(); // never throws

      shared_ptr(shared_ptr const & r); // never throws
      template<class Y> shared_ptr(shared_ptr<Y> const & r); // never throws
      template<class Y> explicit shared_ptr(weak_ptr<Y> const & r);
      template<class Y> explicit shared_ptr(std::auto_ptr<Y> & r);

      shared_ptr & operator=(shared_ptr const & r); // never throws  
      template<class Y> shared_ptr & operator=(shared_ptr<Y> const & r); // never throws
      template<class Y> shared_ptr & operator=(std::auto_ptr<Y> & r);

      void reset(); // never throws
      template<class Y> void reset(Y * p);
      template<class Y, class D> void reset(Y * p, D d);
      template<class Y, class D, class A> void reset(Y * p, D d, A a);

      T & operator*() const; // never throws
      T * operator->() const; // never throws
      T * get() const; // never throws

      bool unique() const; // never throws
      long use_count() const; // never throws

      operator unspecified-bool-type() const; // never throws

      void swap(shared_ptr & b); // never throws
  };

  template<class T, class U>
    bool operator==(shared_ptr<T> const & a, shared_ptr<U> const & b); // never throws

  template<class T, class U>
    bool operator!=(shared_ptr<T> const & a, shared_ptr<U> const & b); // never throws

  template<class T, class U>
    bool operator<(shared_ptr<T> const & a, shared_ptr<U> const & b); // never throws

  template<class T> void swap(shared_ptr<T> & a, shared_ptr<T> & b); // never throws

  template<class T> T * get_pointer(shared_ptr<T> const & p); // never throws

  template<class T, class U>
    shared_ptr<T> static_pointer_cast(shared_ptr<U> const & r); // never throws

  template<class T, class U>
    shared_ptr<T> const_pointer_cast(shared_ptr<U> const & r); // never throws

  template<class T, class U>
    shared_ptr<T> dynamic_pointer_cast(shared_ptr<U> const & r); // never throws

  template<class E, class T, class Y>
    std::basic_ostream<E, T> & operator<< (std::basic_ostream<E, T> & os, shared_ptr<Y> const & p);

  template<class D, class T>
    D * get_deleter(shared_ptr<T> const & p);
}