forked from boostorg/intrusive
72 lines
1.5 KiB
C++
72 lines
1.5 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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//
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// (C) Copyright Joaquín M López Muñoz 2006-2007
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See 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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// See http://www.boost.org/libs/intrusive for documentation.
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//
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/////////////////////////////////////////////////////////////////////////////
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#ifndef BOOST_INTRUSIVE_DETAIL_EBO_HOLDER_HPP
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#define BOOST_INTRUSIVE_DETAIL_EBO_HOLDER_HPP
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#include <boost/type_traits/is_empty.hpp>
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namespace boost {
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namespace intrusive {
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namespace detail {
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template<typename T, bool IsEmpty = false>
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class ebo_holder_impl
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{
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public:
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ebo_holder_impl(){}
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ebo_holder_impl(const T& t):t(t){}
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T& get(){return t;}
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const T& get()const{return t;}
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private:
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T t;
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};
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template<typename T>
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class ebo_holder_impl<T, true>
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: private T
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{
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public:
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ebo_holder_impl(){}
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ebo_holder_impl(const T& t):T(t){}
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T& get(){return *this;}
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const T& get()const{return *this;}
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};
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template<typename T>
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class ebo_holder
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: public ebo_holder_impl<T,boost::is_empty<T>::value>
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{
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private:
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typedef ebo_holder_impl<T,boost::is_empty<T>::value> super;
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public:
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ebo_holder(){}
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ebo_holder(const T& t):super(t){}
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ebo_holder& operator=(const ebo_holder& x)
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{
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this->get()=x.get();
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return *this;
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}
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};
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} //namespace detail {
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} //namespace intrusive {
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} //namespace boost {
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#endif //#ifndef BOOST_INTRUSIVE_DETAIL_EBO_HOLDER_HPP
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