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_DECREMENT_ACTOR_HPP | |
| 9 | #define BOOST_SPIRIT_ACTOR_DECREMENT_ACTOR_HPP | |
| 10 | ||
| 11 | #include <boost/spirit/home/classic/namespace.hpp> | |
| 12 | #include <boost/spirit/home/classic/actor/ref_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 calls the -- operator on a reference. | |
| 21 | // (This doc uses convention available in actors.hpp) | |
| 22 | // | |
| 23 | // Actions: | |
| 24 | // --ref; | |
| 25 | // | |
| 26 | // Policy name: | |
| 27 | // decrement_action | |
| 28 | // | |
| 29 | // Policy holder, corresponding helper method: | |
| 30 | // ref_actor, decrement_a( ref ); | |
| 31 | // | |
| 32 | // () operators: both. | |
| 33 | // | |
| 34 | // See also ref_actor for more details. | |
| 35 | /////////////////////////////////////////////////////////////////////////// | |
| 36 | struct decrement_action | |
| 37 | { | |
| 38 | template< | |
| 39 | typename T | |
| 40 | > | |
| 41 | void act(T& ref_) const | |
| 42 | { | |
| 43 | --ref_; | |
| 44 | } | |
| 45 | }; | |
| 46 | ||
| 47 | /////////////////////////////////////////////////////////////////////////// | |
| 48 | // helper method that creates a and_assign_actor. | |
| 49 | /////////////////////////////////////////////////////////////////////////// | |
| 50 | template<typename T> | |
| 51 | inline ref_actor<T,decrement_action> decrement_a(T& ref_) | |
| 52 | { | |
| 53 | return ref_actor<T,decrement_action>(ref_); | |
| 54 | } | |
| 55 | ||
| 56 | BOOST_SPIRIT_CLASSIC_NAMESPACE_END | |
| 57 | ||
| 58 | }} | |
| 59 | ||
| 60 | #endif |