| /*============================================================================= |
| 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_PUSH_FRONT_ACTOR_HPP |
| #define BOOST_SPIRIT_ACTOR_PUSH_FRONT_ACTOR_HPP |
| |
| #include <boost/spirit/home/classic/namespace.hpp> |
| #include <boost/spirit/home/classic/actor/ref_value_actor.hpp> |
| #include <boost/spirit/home/classic/actor/ref_const_ref_actor.hpp> |
| |
| namespace boost { namespace spirit { |
| |
| BOOST_SPIRIT_CLASSIC_NAMESPACE_BEGIN |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // Summary: |
| // |
| // A semantic action policy that appends a value to the front of a |
| // container. |
| // (This doc uses convention available in actors.hpp) |
| // |
| // Actions (what it does and what ref, value_ref must support): |
| // ref.push_front( value ); |
| // ref.push_front( T::value_type(first,last) ); |
| // ref.push_front( value_ref ); |
| // |
| // Policy name: |
| // push_front_action |
| // |
| // Policy holder, corresponding helper method: |
| // ref_value_actor, push_front_a( ref ); |
| // ref_const_ref_actor, push_front_a( ref, value_ref ); |
| // |
| // () operators: both |
| // |
| // See also ref_value_actor and ref_const_ref_actor for more details. |
| /////////////////////////////////////////////////////////////////////////// |
| struct push_front_action |
| { |
| template< |
| typename T, |
| typename ValueT |
| > |
| void act(T& ref_, ValueT const& value_) const |
| { |
| ref_.push_front( value_ ); |
| } |
| template< |
| typename T, |
| typename IteratorT |
| > |
| void act( |
| T& ref_, |
| IteratorT const& first_, |
| IteratorT const& last_ |
| ) const |
| { |
| typedef typename T::value_type value_type; |
| value_type value(first_,last_); |
| |
| ref_.push_front( value ); |
| } |
| }; |
| |
| template<typename T> |
| inline ref_value_actor<T,push_front_action> push_front_a(T& ref_) |
| { |
| return ref_value_actor<T,push_front_action>(ref_); |
| } |
| |
| template< |
| typename T, |
| typename ValueT |
| > |
| inline ref_const_ref_actor<T,ValueT,push_front_action> push_front_a( |
| T& ref_, |
| ValueT const& value_ |
| ) |
| { |
| return ref_const_ref_actor<T,ValueT,push_front_action>(ref_,value_); |
| } |
| |
| BOOST_SPIRIT_CLASSIC_NAMESPACE_END |
| |
| }} |
| |
| #endif |