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- /*=============================================================================
- Copyright (c) 2003 Jonathan de Halleux (dehalleux@pelikhan.com)
- http://spirit.sourceforge.net/
- Distributed under the Boost Software License, Version 1.0. (See accompanying
- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
- =============================================================================*/
- #ifndef BOOST_SPIRIT_ACTOR_SWAP_ACTOR_HPP
- #define BOOST_SPIRIT_ACTOR_SWAP_ACTOR_HPP
- #include <boost/spirit/home/classic/namespace.hpp>
- #include <boost/spirit/home/classic/actor/ref_value_actor.hpp>
- namespace boost { namespace spirit {
- BOOST_SPIRIT_CLASSIC_NAMESPACE_BEGIN
- ///////////////////////////////////////////////////////////////////////////
- // Summary:
- // A semantic action policy that swaps values.
- // (This doc uses convention available in actors.hpp)
- //
- // Actions (what it does):
- // ref.swap( value_ref );
- //
- // Policy name:
- // swap_action
- //
- // Policy holder, corresponding helper method:
- // ref_value_actor, swap_a( ref );
- // ref_const_ref_actor, swap_a( ref, value_ref );
- //
- // () operators: both
- //
- // See also ref_value_actor and ref_const_ref_actor for more details.
- ///////////////////////////////////////////////////////////////////////////
- template<
- typename T
- >
- class swap_actor
- {
- private:
- T& ref;
- T& swap_ref;
- public:
- swap_actor(
- T& ref_,
- T& swap_ref_)
- : ref(ref_), swap_ref(swap_ref_)
- {};
- template<typename T2>
- void operator()(T2 const& /*val*/) const
- {
- ref.swap(swap_ref);
- }
- template<typename IteratorT>
- void operator()(
- IteratorT const& /*first*/,
- IteratorT const& /*last*/
- ) const
- {
- ref.swap(swap_ref);
- }
- };
- template<
- typename T
- >
- inline swap_actor<T> swap_a(
- T& ref_,
- T& swap_ref_
- )
- {
- return swap_actor<T>(ref_,swap_ref_);
- }
- BOOST_SPIRIT_CLASSIC_NAMESPACE_END
- }}
- #endif
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