sl@0: //-----------------------------------------------------------------------------
sl@0: // boost variant/recursive_wrapper.hpp header file
sl@0: // See http://www.boost.org for updates, documentation, and revision history.
sl@0: //-----------------------------------------------------------------------------
sl@0: //
sl@0: // Copyright (c) 2002-2003
sl@0: // Eric Friedman, Itay Maman
sl@0: //
sl@0: // Distributed under the Boost Software License, Version 1.0. (See
sl@0: // accompanying file LICENSE_1_0.txt or copy at
sl@0: // http://www.boost.org/LICENSE_1_0.txt)
sl@0: 
sl@0: #ifndef BOOST_VARIANT_RECURSIVE_WRAPPER_HPP
sl@0: #define BOOST_VARIANT_RECURSIVE_WRAPPER_HPP
sl@0: 
sl@0: #include "boost/variant/recursive_wrapper_fwd.hpp"
sl@0: #include "boost/checked_delete.hpp"
sl@0: 
sl@0: namespace boost {
sl@0: 
sl@0: //////////////////////////////////////////////////////////////////////////
sl@0: // class template recursive_wrapper
sl@0: //
sl@0: // See docs and recursive_wrapper_fwd.hpp for more information.
sl@0: //
sl@0: 
sl@0: template <typename T>
sl@0: class recursive_wrapper
sl@0: {
sl@0: public: // typedefs
sl@0: 
sl@0:     typedef T type;
sl@0: 
sl@0: private: // representation
sl@0: 
sl@0:     T* p_;
sl@0: 
sl@0: public: // structors
sl@0: 
sl@0:     ~recursive_wrapper();
sl@0:     recursive_wrapper();
sl@0: 
sl@0:     recursive_wrapper(const recursive_wrapper& operand);
sl@0:     recursive_wrapper(const T& operand);
sl@0: 
sl@0: private: // helpers, for modifiers (below)
sl@0: 
sl@0:     void assign(const T& rhs);
sl@0: 
sl@0: public: // modifiers
sl@0: 
sl@0:     recursive_wrapper& operator=(const recursive_wrapper& rhs)
sl@0:     {
sl@0:         assign( rhs.get() );
sl@0:         return *this;
sl@0:     }
sl@0: 
sl@0:     recursive_wrapper& operator=(const T& rhs)
sl@0:     {
sl@0:         assign( rhs );
sl@0:         return *this;
sl@0:     }
sl@0: 
sl@0:     void swap(recursive_wrapper& operand)
sl@0:     {
sl@0:         T* temp = operand.p_;
sl@0:         operand.p_ = p_;
sl@0:         p_ = temp;
sl@0:     }
sl@0: 
sl@0: public: // queries
sl@0: 
sl@0:     T& get() { return *get_pointer(); }
sl@0:     const T& get() const { return *get_pointer(); }
sl@0: 
sl@0:     T* get_pointer() { return p_; }
sl@0:     const T* get_pointer() const { return p_; }
sl@0: 
sl@0: };
sl@0: 
sl@0: template <typename T>
sl@0: recursive_wrapper<T>::~recursive_wrapper()
sl@0: {
sl@0:     boost::checked_delete(p_);
sl@0: }
sl@0: 
sl@0: template <typename T>
sl@0: recursive_wrapper<T>::recursive_wrapper()
sl@0:     : p_(new T)
sl@0: {
sl@0: }
sl@0: 
sl@0: template <typename T>
sl@0: recursive_wrapper<T>::recursive_wrapper(const recursive_wrapper& operand)
sl@0:     : p_(new T( operand.get() ))
sl@0: {
sl@0: }
sl@0: 
sl@0: template <typename T>
sl@0: recursive_wrapper<T>::recursive_wrapper(const T& operand)
sl@0:     : p_(new T(operand))
sl@0: {
sl@0: }
sl@0: 
sl@0: template <typename T>
sl@0: void recursive_wrapper<T>::assign(const T& rhs)
sl@0: {
sl@0:     this->get() = rhs;
sl@0: }
sl@0: 
sl@0: // function template swap
sl@0: //
sl@0: // Swaps two recursive_wrapper<T> objects of the same type T.
sl@0: //
sl@0: template <typename T>
sl@0: inline void swap(recursive_wrapper<T>& lhs, recursive_wrapper<T>& rhs)
sl@0: {
sl@0:     lhs.swap(rhs);
sl@0: }
sl@0: 
sl@0: } // namespace boost
sl@0: 
sl@0: #endif // BOOST_VARIANT_RECURSIVE_WRAPPER_HPP