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1 | // Copyright (c) 2001-2011 Hartmut Kaiser |
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_KARMA_AND_PREDICATE_MAR_22_2009_0412PM) | |
8 | #define SPIRIT_KARMA_AND_PREDICATE_MAR_22_2009_0412PM | |
9 | ||
10 | #if defined(_MSC_VER) | |
11 | #pragma once | |
12 | #endif | |
13 | ||
14 | #include <boost/spirit/home/karma/domain.hpp> | |
15 | #include <boost/spirit/home/karma/meta_compiler.hpp> | |
16 | #include <boost/spirit/home/karma/generator.hpp> | |
17 | #include <boost/spirit/home/karma/detail/output_iterator.hpp> | |
18 | #include <boost/spirit/home/karma/detail/attributes.hpp> | |
19 | #include <boost/spirit/home/support/info.hpp> | |
20 | #include <boost/spirit/home/support/has_semantic_action.hpp> | |
21 | #include <boost/spirit/home/support/handles_container.hpp> | |
22 | ||
23 | namespace boost { namespace spirit | |
24 | { | |
25 | /////////////////////////////////////////////////////////////////////////// | |
26 | // Enablers | |
27 | /////////////////////////////////////////////////////////////////////////// | |
28 | template <> | |
29 | struct use_operator<karma::domain, proto::tag::address_of> // enables &g | |
30 | : mpl::true_ {}; | |
31 | }} | |
32 | ||
33 | namespace boost { namespace spirit { namespace karma | |
34 | { | |
35 | template <typename Subject> | |
36 | struct and_predicate : unary_generator<and_predicate<Subject> > | |
37 | { | |
38 | typedef Subject subject_type; | |
39 | typedef mpl::int_< | |
40 | generator_properties::disabling | subject_type::properties::value | |
41 | > properties; | |
42 | ||
43 | template <typename Context, typename Iterator> | |
44 | struct attribute | |
45 | : traits::attribute_of<subject_type, Context, Iterator> | |
46 | {}; | |
47 | ||
48 | and_predicate(Subject const& subject) | |
49 | : subject(subject) {} | |
50 | ||
51 | template < | |
52 | typename OutputIterator, typename Context, typename Delimiter | |
53 | , typename Attribute> | |
54 | bool generate(OutputIterator& sink, Context& ctx, Delimiter const& d | |
55 | , Attribute const& attr) const | |
56 | { | |
57 | // inhibits output | |
58 | detail::disable_output<OutputIterator> disable(sink); | |
59 | return subject.generate(sink, ctx, d, attr); | |
60 | } | |
61 | ||
62 | template <typename Context> | |
63 | info what(Context& context) const | |
64 | { | |
65 | return info("and-predicate", subject.what(context)); | |
66 | } | |
67 | ||
68 | Subject subject; | |
69 | }; | |
70 | ||
71 | /////////////////////////////////////////////////////////////////////////// | |
72 | // Generator generators: make_xxx function (objects) | |
73 | /////////////////////////////////////////////////////////////////////////// | |
74 | template <typename Elements, typename Modifiers> | |
75 | struct make_composite<proto::tag::address_of, Elements, Modifiers> | |
76 | : make_unary_composite<Elements, and_predicate> {}; | |
77 | ||
78 | }}} | |
79 | ||
80 | namespace boost { namespace spirit { namespace traits | |
81 | { | |
82 | /////////////////////////////////////////////////////////////////////////// | |
83 | template <typename Subject> | |
84 | struct has_semantic_action<karma::and_predicate<Subject> > | |
85 | : unary_has_semantic_action<Subject> {}; | |
86 | ||
87 | /////////////////////////////////////////////////////////////////////////// | |
88 | template <typename Subject, typename Attribute, typename Context | |
89 | , typename Iterator> | |
90 | struct handles_container<karma::and_predicate<Subject>, Attribute | |
91 | , Context, Iterator> | |
92 | : unary_handles_container<Subject, Attribute, Context, Iterator> {}; | |
93 | }}} | |
94 | ||
95 | #endif |