136331963a
[SVN r79098]
65 lines
1.9 KiB
C++
65 lines
1.9 KiB
C++
/*=============================================================================
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Copyright (c) 2012 Joel falcou
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#include <iostream>
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#include <boost/mpl/transform.hpp>
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#include <boost/fusion/include/mpl.hpp>
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#include <boost/fusion/adapted/mpl.hpp>
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#include <boost/fusion/include/at.hpp>
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#include <boost/fusion/include/as_vector.hpp>
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#include <boost/type_traits/add_reference.hpp>
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#include <boost/fusion/include/adapt_struct.hpp>
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struct foo
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{
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double d; float f; short c;
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};
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BOOST_FUSION_ADAPT_STRUCT(foo,(double,d)(float,f)(short,c))
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template<class T>
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class composite_reference
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: public boost::mpl::
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transform < typename boost::fusion::result_of::
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as_vector<T>::type
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, boost::add_reference<boost::mpl::_>
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>::type
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{
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public:
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typedef typename boost::mpl::
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transform < typename boost::fusion::result_of::
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as_vector<T>::type
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, boost::add_reference<boost::mpl::_>
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>::type parent;
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composite_reference(T& src) : parent( src ) {}
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composite_reference(parent& src) : parent(src) {}
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composite_reference& operator=(T& src)
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{
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static_cast<parent&>(*this) = static_cast<parent&>(src);
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return *this;
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}
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composite_reference& operator=(parent const& src)
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{
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static_cast<parent&>(*this) = src;
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return *this;
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}
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};
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int main(int,char**)
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{
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foo f;
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composite_reference<foo> ref_f(f);
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boost::fusion::at_c<0>(ref_f) = 1.2;
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boost::fusion::at_c<1>(ref_f) = 1.2f;
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boost::fusion::at_c<2>(ref_f) = 12;
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std::cout << f.d << " " << f.f << " " << f.c << "\n";
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}
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