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