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