| /*============================================================================= | |
| 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 |