45 lines
1.3 KiB
C++
45 lines
1.3 KiB
C++
/*=============================================================================
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Copyright (c) 2005-2007 Joel de Guzman
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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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#ifndef PHOENIX_DETAIL_LOCAL_REFERENCE_HPP
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#define PHOENIX_DETAIL_LOCAL_REFERENCE_HPP
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#include <boost/utility/addressof.hpp>
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namespace boost { namespace phoenix { namespace detail
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{
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template <typename T>
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struct local_reference
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{
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typedef T type;
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explicit local_reference(T& t): t_(boost::addressof(t)) {}
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operator T& () const { return *t_; }
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local_reference& operator=(T const& x) { *t_ = x; return *this; }
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local_reference const& operator=(T const& x) const { *t_ = x; return *this; }
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T& get() const { return *t_; }
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T* get_pointer() 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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struct unwrap_local_reference
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{
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typedef T type; // T should be a reference
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};
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template <typename T>
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struct unwrap_local_reference<local_reference<T> >
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{
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typedef T type; // unwrap the reference; T is a value
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};
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}}}
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#endif
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