92 lines
2.8 KiB
Plaintext
92 lines
2.8 KiB
Plaintext
/*=============================================================================
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Copyright (c) 2003 Jonathan de Halleux (dehalleux@pelikhan.com)
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http://spirit.sourceforge.net/
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#ifndef BOOST_SPIRIT_ACTOR_PUSH_FRONT_ACTOR_HPP
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#define BOOST_SPIRIT_ACTOR_PUSH_FRONT_ACTOR_HPP
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#include <boost/spirit/home/classic/namespace.hpp>
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#include <boost/spirit/home/classic/actor/ref_value_actor.hpp>
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#include <boost/spirit/home/classic/actor/ref_const_ref_actor.hpp>
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namespace boost { namespace spirit {
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BOOST_SPIRIT_CLASSIC_NAMESPACE_BEGIN
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///////////////////////////////////////////////////////////////////////////
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// Summary:
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//
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// A semantic action policy that appends a value to the front of a
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// container.
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// (This doc uses convention available in actors.hpp)
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//
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// Actions (what it does and what ref, value_ref must support):
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// ref.push_front( value );
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// ref.push_front( T::value_type(first,last) );
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// ref.push_front( value_ref );
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//
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// Policy name:
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// push_front_action
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//
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// Policy holder, corresponding helper method:
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// ref_value_actor, push_front_a( ref );
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// ref_const_ref_actor, push_front_a( ref, value_ref );
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//
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// () operators: both
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//
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// See also ref_value_actor and ref_const_ref_actor for more details.
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///////////////////////////////////////////////////////////////////////////
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struct push_front_action
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{
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template<
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typename T,
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typename ValueT
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>
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void act(T& ref_, ValueT const& value_) const
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{
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ref_.push_front( value_ );
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}
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template<
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typename T,
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typename IteratorT
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>
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void act(
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T& ref_,
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IteratorT const& first_,
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IteratorT const& last_
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) const
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{
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typedef typename T::value_type value_type;
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value_type value(first_,last_);
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ref_.push_front( value );
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}
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};
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template<typename T>
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inline ref_value_actor<T,push_front_action> push_front_a(T& ref_)
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{
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return ref_value_actor<T,push_front_action>(ref_);
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}
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template<
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typename T,
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typename ValueT
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>
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inline ref_const_ref_actor<T,ValueT,push_front_action> push_front_a(
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T& ref_,
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ValueT const& value_
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)
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{
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return ref_const_ref_actor<T,ValueT,push_front_action>(ref_,value_);
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}
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BOOST_SPIRIT_CLASSIC_NAMESPACE_END
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}}
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#endif
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