[857] | 1 | /*=============================================================================
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| 2 | Copyright (c) 2003 Jonathan de Halleux (dehalleux@pelikhan.com)
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| 3 | http://spirit.sourceforge.net/
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| 4 |
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| 5 | Use, modification and distribution is subject to the Boost Software
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| 6 | License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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| 7 | http://www.boost.org/LICENSE_1_0.txt)
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| 8 | =============================================================================*/
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| 9 | #ifndef BOOST_SPIRIT_ACTOR_SWAP_ACTOR_HPP
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| 10 | #define BOOST_SPIRIT_ACTOR_SWAP_ACTOR_HPP
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| 11 |
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| 12 | #include <boost/spirit/actor/ref_value_actor.hpp>
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| 13 |
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| 14 | namespace boost { namespace spirit {
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| 15 |
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| 16 | ///////////////////////////////////////////////////////////////////////////
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| 17 | // Summary:
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| 18 | // A semantic action policy that swaps values.
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| 19 | // (This doc uses convention available in actors.hpp)
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| 20 | //
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| 21 | // Actions (what it does):
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| 22 | // ref.swap( value_ref );
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| 23 | //
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| 24 | // Policy name:
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| 25 | // swap_action
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| 26 | //
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| 27 | // Policy holder, corresponding helper method:
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| 28 | // ref_value_actor, swap_a( ref );
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| 29 | // ref_const_ref_actor, swap_a( ref, value_ref );
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| 30 | //
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| 31 | // () operators: both
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| 32 | //
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| 33 | // See also ref_value_actor and ref_const_ref_actor for more details.
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| 34 | ///////////////////////////////////////////////////////////////////////////
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| 35 | template<
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| 36 | typename T
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| 37 | >
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| 38 | class swap_actor
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| 39 | {
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| 40 | private:
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| 41 | T& ref;
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| 42 | T& swap_ref;
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| 43 |
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| 44 | public:
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| 45 | swap_actor(
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| 46 | T& ref_,
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| 47 | T& swap_ref_)
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| 48 | : ref(ref_), swap_ref(swap_ref_)
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| 49 | {};
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| 50 |
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| 51 | template<typename T2>
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| 52 | void operator()(T2 const& /*val*/) const
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| 53 | {
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| 54 | ref.swap(swap_ref);
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| 55 | }
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| 56 |
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| 57 |
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| 58 | template<typename IteratorT>
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| 59 | void operator()(
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| 60 | IteratorT const& /*first*/,
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| 61 | IteratorT const& /*last*/
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| 62 | ) const
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| 63 | {
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| 64 | ref.swap(swap_ref);
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| 65 | }
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| 66 | };
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| 67 |
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| 68 | template<
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| 69 | typename T
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| 70 | >
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| 71 | inline swap_actor<T> swap_a(
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| 72 | T& ref_,
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| 73 | T& swap_ref_
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| 74 | )
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| 75 | {
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| 76 | return swap_actor<T>(ref_,swap_ref_);
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| 77 | }
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| 78 |
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| 79 | }}
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| 80 |
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| 81 | #endif
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