| author | sl |
| Tue, 10 Jun 2014 14:32:02 +0200 | |
| changeset 1 | 260cb5ec6c19 |
| permissions | -rw-r--r-- |
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//----------------------------------------------------------------------------- |
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// boost variant/recursive_wrapper.hpp header file |
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// See http://www.boost.org for updates, documentation, and revision history. |
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//----------------------------------------------------------------------------- |
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// |
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// Copyright (c) 2002-2003 |
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// Eric Friedman, Itay Maman |
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// |
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// Distributed under the Boost Software License, Version 1.0. (See |
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// accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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|
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#ifndef BOOST_VARIANT_RECURSIVE_WRAPPER_HPP |
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#define BOOST_VARIANT_RECURSIVE_WRAPPER_HPP |
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#include "boost/variant/recursive_wrapper_fwd.hpp" |
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#include "boost/checked_delete.hpp" |
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|
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namespace boost {
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////////////////////////////////////////////////////////////////////////// |
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// class template recursive_wrapper |
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// |
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// See docs and recursive_wrapper_fwd.hpp for more information. |
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// |
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|
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template <typename T> |
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class recursive_wrapper |
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{
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public: // typedefs |
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typedef T type; |
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private: // representation |
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T* p_; |
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|
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public: // structors |
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|
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~recursive_wrapper(); |
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recursive_wrapper(); |
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|
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recursive_wrapper(const recursive_wrapper& operand); |
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recursive_wrapper(const T& operand); |
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private: // helpers, for modifiers (below) |
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void assign(const T& rhs); |
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|
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public: // modifiers |
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|
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recursive_wrapper& operator=(const recursive_wrapper& rhs) |
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{
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assign( rhs.get() ); |
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return *this; |
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} |
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|
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recursive_wrapper& operator=(const T& rhs) |
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{
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assign( rhs ); |
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return *this; |
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} |
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void swap(recursive_wrapper& operand) |
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{
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T* temp = operand.p_; |
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operand.p_ = p_; |
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p_ = temp; |
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} |
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public: // queries |
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T& get() { return *get_pointer(); }
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const T& get() const { return *get_pointer(); }
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T* get_pointer() { return p_; }
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const T* get_pointer() const { return p_; }
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}; |
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template <typename T> |
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recursive_wrapper<T>::~recursive_wrapper() |
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{
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boost::checked_delete(p_); |
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} |
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template <typename T> |
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recursive_wrapper<T>::recursive_wrapper() |
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: p_(new T) |
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{
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} |
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|
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template <typename T> |
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recursive_wrapper<T>::recursive_wrapper(const recursive_wrapper& operand) |
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: p_(new T( operand.get() )) |
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{
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} |
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template <typename T> |
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recursive_wrapper<T>::recursive_wrapper(const T& operand) |
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: p_(new T(operand)) |
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{
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} |
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template <typename T> |
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void recursive_wrapper<T>::assign(const T& rhs) |
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{
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this->get() = rhs; |
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} |
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// function template swap |
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// |
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// Swaps two recursive_wrapper<T> objects of the same type T. |
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// |
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template <typename T> |
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inline void swap(recursive_wrapper<T>& lhs, recursive_wrapper<T>& rhs) |
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{
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lhs.swap(rhs); |
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} |
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|
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} // namespace boost |
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|
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#endif // BOOST_VARIANT_RECURSIVE_WRAPPER_HPP |