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1 | /*============================================================================= |
2 | Copyright (c) 2001-2011 Joel de Guzman | |
3 | ||
4 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
5 | file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
6 | =============================================================================*/ | |
7 | #if !defined(SPIRIT_PASS_FUNCTION_FEBRUARY_05_2007_1138AM) | |
8 | #define SPIRIT_PASS_FUNCTION_FEBRUARY_05_2007_1138AM | |
9 | ||
10 | #if defined(_MSC_VER) | |
11 | #pragma once | |
12 | #endif | |
13 | ||
14 | #include <boost/spirit/home/support/unused.hpp> | |
15 | #include <boost/optional.hpp> | |
16 | ||
17 | namespace boost { namespace spirit { namespace qi { namespace detail | |
18 | { | |
19 | template <typename Iterator, typename Context, typename Skipper> | |
20 | struct pass_function | |
21 | { | |
22 | pass_function( | |
23 | Iterator& first_, Iterator const& last_ | |
24 | , Context& context_, Skipper const& skipper_) | |
25 | : first(first_) | |
26 | , last(last_) | |
27 | , context(context_) | |
28 | , skipper(skipper_) | |
29 | { | |
30 | } | |
31 | ||
32 | template <typename Component, typename Attribute> | |
33 | bool operator()(Component const& component, Attribute& attr) | |
34 | { | |
35 | // return true if the parser succeeds | |
36 | return component.parse(first, last, context, skipper, attr); | |
37 | } | |
38 | ||
39 | template <typename Component, typename Attribute> | |
40 | bool operator()(Component const& component, boost::optional<Attribute>& attr) | |
41 | { | |
42 | // return true if the parser succeeds | |
43 | Attribute val; | |
44 | if (component.parse(first, last, context, skipper, val)) | |
45 | { | |
46 | attr = val; | |
47 | return true; | |
48 | } | |
49 | return false; | |
50 | } | |
51 | ||
52 | template <typename Component> | |
53 | bool operator()(Component const& component) | |
54 | { | |
55 | // return true if the parser succeeds | |
56 | return component.parse(first, last, context, skipper, unused); | |
57 | } | |
58 | ||
59 | Iterator& first; | |
60 | Iterator const& last; | |
61 | Context& context; | |
62 | Skipper const& skipper; | |
63 | ||
64 | private: | |
65 | // silence MSVC warning C4512: assignment operator could not be generated | |
66 | pass_function& operator= (pass_function const&); | |
67 | }; | |
68 | }}}} | |
69 | ||
70 | #endif |