projects / ceph.git / blame
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|---|---|---|
| 7c673cae FG |
1 | /*============================================================================= |
| 2 | Copyright (c) 2003 Jonathan de Halleux (dehalleux@pelikhan.com) | |
| 3 | http://spirit.sourceforge.net/ | |
| 4 | ||
| 5 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
| 6 | file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
| 7 | =============================================================================*/ | |
| 8 | #ifndef BOOST_SPIRIT_ACTOR_SWAP_ACTOR_HPP | |
| 9 | #define BOOST_SPIRIT_ACTOR_SWAP_ACTOR_HPP | |
| 10 | ||
| 11 | #include <boost/spirit/home/classic/namespace.hpp> | |
| 12 | #include <boost/spirit/home/classic/actor/ref_value_actor.hpp> | |
| 13 | ||
| 14 | namespace boost { namespace spirit { | |
| 15 | ||
| 16 | BOOST_SPIRIT_CLASSIC_NAMESPACE_BEGIN | |
| 17 | ||
| 18 | /////////////////////////////////////////////////////////////////////////// | |
| 19 | // Summary: | |
| 20 | // A semantic action policy that swaps values. | |
| 21 | // (This doc uses convention available in actors.hpp) | |
| 22 | // | |
| 23 | // Actions (what it does): | |
| 24 | // ref.swap( value_ref ); | |
| 25 | // | |
| 26 | // Policy name: | |
| 27 | // swap_action | |
| 28 | // | |
| 29 | // Policy holder, corresponding helper method: | |
| 30 | // ref_value_actor, swap_a( ref ); | |
| 31 | // ref_const_ref_actor, swap_a( ref, value_ref ); | |
| 32 | // | |
| 33 | // () operators: both | |
| 34 | // | |
| 35 | // See also ref_value_actor and ref_const_ref_actor for more details. | |
| 36 | /////////////////////////////////////////////////////////////////////////// | |
| 37 | template< | |
| 38 | typename T | |
| 39 | > | |
| 40 | class swap_actor | |
| 41 | { | |
| 42 | private: | |
| 43 | T& ref; | |
| 44 | T& swap_ref; | |
| 45 | ||
| 46 | public: | |
| 47 | swap_actor( | |
| 48 | T& ref_, | |
| 49 | T& swap_ref_) | |
| 50 | : ref(ref_), swap_ref(swap_ref_) | |
| 51 | {}; | |
| 52 | ||
| 53 | template<typename T2> | |
| 54 | void operator()(T2 const& /*val*/) const | |
| 55 | { | |
| 56 | ref.swap(swap_ref); | |
| 57 | } | |
| 58 | ||
| 59 | ||
| 60 | template<typename IteratorT> | |
| 61 | void operator()( | |
| 62 | IteratorT const& /*first*/, | |
| 63 | IteratorT const& /*last*/ | |
| 64 | ) const | |
| 65 | { | |
| 66 | ref.swap(swap_ref); | |
| 67 | } | |
| 68 | }; | |
| 69 | ||
| 70 | template< | |
| 71 | typename T | |
| 72 | > | |
| 73 | inline swap_actor<T> swap_a( | |
| 74 | T& ref_, | |
| 75 | T& swap_ref_ | |
| 76 | ) | |
| 77 | { | |
| 78 | return swap_actor<T>(ref_,swap_ref_); | |
| 79 | } | |
| 80 | ||
| 81 | BOOST_SPIRIT_CLASSIC_NAMESPACE_END | |
| 82 | ||
| 83 | }} | |
| 84 | ||
| 85 | #endif |