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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_PUSH_FRONT_ACTOR_HPP | |
9 | #define BOOST_SPIRIT_ACTOR_PUSH_FRONT_ACTOR_HPP | |
10 | ||
11 | #include <boost/spirit/home/classic/namespace.hpp> | |
12 | #include <boost/spirit/home/classic/actor/ref_value_actor.hpp> | |
13 | #include <boost/spirit/home/classic/actor/ref_const_ref_actor.hpp> | |
14 | ||
15 | namespace boost { namespace spirit { | |
16 | ||
17 | BOOST_SPIRIT_CLASSIC_NAMESPACE_BEGIN | |
18 | ||
19 | /////////////////////////////////////////////////////////////////////////// | |
20 | // Summary: | |
21 | // | |
22 | // A semantic action policy that appends a value to the front of a | |
23 | // container. | |
24 | // (This doc uses convention available in actors.hpp) | |
25 | // | |
26 | // Actions (what it does and what ref, value_ref must support): | |
27 | // ref.push_front( value ); | |
28 | // ref.push_front( T::value_type(first,last) ); | |
29 | // ref.push_front( value_ref ); | |
30 | // | |
31 | // Policy name: | |
32 | // push_front_action | |
33 | // | |
34 | // Policy holder, corresponding helper method: | |
35 | // ref_value_actor, push_front_a( ref ); | |
36 | // ref_const_ref_actor, push_front_a( ref, value_ref ); | |
37 | // | |
38 | // () operators: both | |
39 | // | |
40 | // See also ref_value_actor and ref_const_ref_actor for more details. | |
41 | /////////////////////////////////////////////////////////////////////////// | |
42 | struct push_front_action | |
43 | { | |
44 | template< | |
45 | typename T, | |
46 | typename ValueT | |
47 | > | |
48 | void act(T& ref_, ValueT const& value_) const | |
49 | { | |
50 | ref_.push_front( value_ ); | |
51 | } | |
52 | template< | |
53 | typename T, | |
54 | typename IteratorT | |
55 | > | |
56 | void act( | |
57 | T& ref_, | |
58 | IteratorT const& first_, | |
59 | IteratorT const& last_ | |
60 | ) const | |
61 | { | |
62 | typedef typename T::value_type value_type; | |
63 | value_type value(first_,last_); | |
64 | ||
65 | ref_.push_front( value ); | |
66 | } | |
67 | }; | |
68 | ||
69 | template<typename T> | |
70 | inline ref_value_actor<T,push_front_action> push_front_a(T& ref_) | |
71 | { | |
72 | return ref_value_actor<T,push_front_action>(ref_); | |
73 | } | |
74 | ||
75 | template< | |
76 | typename T, | |
77 | typename ValueT | |
78 | > | |
79 | inline ref_const_ref_actor<T,ValueT,push_front_action> push_front_a( | |
80 | T& ref_, | |
81 | ValueT const& value_ | |
82 | ) | |
83 | { | |
84 | return ref_const_ref_actor<T,ValueT,push_front_action>(ref_,value_); | |
85 | } | |
86 | ||
87 | BOOST_SPIRIT_CLASSIC_NAMESPACE_END | |
88 | ||
89 | }} | |
90 | ||
91 | #endif |