62 lines
1.9 KiB
Plaintext
62 lines
1.9 KiB
Plaintext
/*=============================================================================
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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_CLEAR_ACTOR_HPP
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#define BOOST_SPIRIT_ACTOR_CLEAR_ACTOR_HPP
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#include <boost/spirit/home/classic/namespace.hpp>
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#include <boost/spirit/home/classic/actor/ref_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 calls clear method.
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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.clear();
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//
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// Policy name:
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// clear_action
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//
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// Policy holder, corresponding helper method:
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// ref_actor, clear_a( ref );
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//
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// () operators: both.
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//
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// See also ref_actor for more details.
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///////////////////////////////////////////////////////////////////////////
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struct clear_action
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{
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template<
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typename T
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>
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void act(T& ref_) const
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{
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ref_.clear();
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}
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};
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///////////////////////////////////////////////////////////////////////////
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// helper method that creates a and_assign_actor.
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///////////////////////////////////////////////////////////////////////////
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template<typename T>
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inline ref_actor<T,clear_action> clear_a(T& ref_)
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{
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return ref_actor<T,clear_action>(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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