Chris@16: //
Chris@16: //  Copyright (c) 2010 Artyom Beilis (Tonkikh)
Chris@16: //
Chris@16: //  Distributed under the Boost Software License, Version 1.0. (See
Chris@16: //  accompanying file LICENSE_1_0.txt or copy at
Chris@16: //  http://www.boost.org/LICENSE_1_0.txt)
Chris@16: //
Chris@16: #ifndef BOOST_LOCALE_HOLD_PTR_H
Chris@16: #define BOOST_LOCALE_HOLD_PTR_H
Chris@16: 
Chris@16: namespace boost { 
Chris@16: namespace locale {
Chris@16:     ///
Chris@16:     /// \brief a smart pointer similar to std::auto_ptr but it is non-copyable and the
Chris@16:     /// underlying object has the same constness as the pointer itself (unlike an ordinary pointer).
Chris@16:     ///
Chris@16:     template<typename T>
Chris@16:     class hold_ptr {
Chris@16:         hold_ptr(hold_ptr const &other); // non copyable 
Chris@16:         hold_ptr const &operator=(hold_ptr const &other); // non assignable
Chris@16:     public:
Chris@16:         ///
Chris@16:         /// Create new empty pointer
Chris@16:         ///
Chris@16:         hold_ptr() : ptr_(0) {}
Chris@16:         ///
Chris@16:         /// Create a pointer that holds \a v, ownership is transferred to smart pointer
Chris@16:         ///
Chris@16:         explicit hold_ptr(T *v) : ptr_(v) {}
Chris@16: 
Chris@16:         ///
Chris@16:         /// Destroy smart pointer and the object it owns.
Chris@16:         ///
Chris@16:         ~hold_ptr() 
Chris@16:         {
Chris@16:             delete ptr_;
Chris@16:         }
Chris@16: 
Chris@16:         ///
Chris@16:         /// Get a const pointer to the object
Chris@16:         ///
Chris@16:         T const *get() const { return ptr_; }
Chris@16:         ///
Chris@16:         /// Get a mutable pointer to the object 
Chris@16:         ///
Chris@16:         T *get() { return ptr_; }
Chris@16: 
Chris@16:         /// 
Chris@16:         /// Get a const reference to the object
Chris@16:         ///
Chris@16:         T const &operator *() const { return *ptr_; }
Chris@16:         /// 
Chris@16:         /// Get a mutable reference to the object
Chris@16:         ///
Chris@16:         T &operator *() { return *ptr_; }
Chris@16:         ///
Chris@16:         /// Get a const pointer to the object
Chris@16:         ///
Chris@16:         T const *operator->() const { return ptr_; }
Chris@16:         ///
Chris@16:         /// Get a mutable pointer to the object 
Chris@16:         ///
Chris@16:         T *operator->() { return ptr_; }
Chris@16: 
Chris@16:         ///
Chris@16:         /// Transfer an ownership on the pointer to user
Chris@16:         ///
Chris@16:         T *release() { T *tmp=ptr_; ptr_=0; return tmp; }
Chris@16: 
Chris@16:         ///
Chris@16:         /// Set new value to pointer, previous object is destroyed, ownership on new object is transferred
Chris@16:         ///
Chris@16:         void reset(T *p=0)
Chris@16:         {
Chris@16:             if(ptr_) delete ptr_;
Chris@16:             ptr_=p;
Chris@16:         }
Chris@16:         /// Swap two pointers
Chris@16:         void swap(hold_ptr &other)
Chris@16:         {
Chris@16:             T *tmp=other.ptr_;
Chris@16:             other.ptr_=ptr_;
Chris@16:             ptr_=tmp;
Chris@16:         }
Chris@16:     private:
Chris@16:         T *ptr_;
Chris@16:     };
Chris@16: 
Chris@16: } // locale
Chris@16: } // boost
Chris@16: 
Chris@16: #endif
Chris@16: // vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4