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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_ASSIGN_ACTOR_HPP | |
9 | #define BOOST_SPIRIT_ACTOR_ASSIGN_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 | // A semantic action policy that applies the assignement operator. | |
22 | // (This doc uses convention available in actors.hpp) | |
23 | // | |
24 | // Actions (what it does): | |
25 | // ref = value; | |
26 | // ref = T(first,last); | |
27 | // ref = value_ref; | |
28 | // | |
29 | // Policy name: | |
30 | // assign_action | |
31 | // | |
32 | // Policy holder, corresponding helper method: | |
33 | // ref_value_actor, assign_a( ref ); | |
34 | // ref_const_ref_actor, assign_a( ref, value_ref ); | |
35 | // | |
36 | // () operators: both | |
37 | // | |
38 | // See also ref_value_actor and ref_const_ref_actor for more details. | |
39 | /////////////////////////////////////////////////////////////////////////// | |
40 | struct assign_action | |
41 | { | |
42 | template< | |
43 | typename T, | |
44 | typename ValueT | |
45 | > | |
46 | void act(T& ref_, ValueT const& value_) const | |
47 | { | |
48 | ref_ = value_; | |
49 | } | |
50 | template< | |
51 | typename T, | |
52 | typename IteratorT | |
53 | > | |
54 | void act( | |
55 | T& ref_, | |
56 | IteratorT const& first_, | |
57 | IteratorT const& last_ | |
58 | ) const | |
59 | { | |
60 | typedef T value_type; | |
61 | #ifndef BOOST_NO_TEMPLATED_ITERATOR_CONSTRUCTORS | |
62 | value_type value(first_,last_); | |
63 | #else | |
64 | value_type value; | |
65 | std::copy(first_, last_, std::inserter(value, value.end())); | |
66 | #endif | |
67 | ref_ = value; | |
68 | } | |
69 | }; | |
70 | ||
71 | // Deprecated. Please use assign_a | |
72 | template<typename T> | |
73 | inline ref_value_actor<T,assign_action> assign(T& ref_) | |
74 | { | |
75 | return ref_value_actor<T,assign_action>(ref_); | |
76 | } | |
77 | ||
78 | template<typename T> | |
79 | inline ref_value_actor<T,assign_action> assign_a(T& ref_) | |
80 | { | |
81 | return ref_value_actor<T,assign_action>(ref_); | |
82 | } | |
83 | ||
84 | template< | |
85 | typename T, | |
86 | typename ValueT | |
87 | > | |
88 | inline ref_const_ref_actor<T,ValueT,assign_action> assign_a( | |
89 | T& ref_, | |
90 | ValueT const& value_ | |
91 | ) | |
92 | { | |
93 | return ref_const_ref_actor<T,ValueT,assign_action>(ref_,value_); | |
94 | } | |
95 | ||
96 | BOOST_SPIRIT_CLASSIC_NAMESPACE_END | |
97 | ||
98 | }} | |
99 | ||
100 | #endif |