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/Src/Dependencies/Boost/boost/spirit/home/qi/operator/and_predicate.hpp

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C++ Header | 92 lines | 65 code | 13 blank | 14 comment | 0 complexity | 071c62bfbfdaf34f2bb0e65f96b6ab66 MD5 | raw file
 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_AND_PREDICATE_MARCH_23_2007_0617PM)
 8#define SPIRIT_AND_PREDICATE_MARCH_23_2007_0617PM
 9
10#if defined(_MSC_VER)
11#pragma once
12#endif
13
14#include <boost/spirit/home/qi/domain.hpp>
15#include <boost/spirit/home/qi/meta_compiler.hpp>
16#include <boost/spirit/home/qi/parser.hpp>
17#include <boost/spirit/home/qi/detail/attributes.hpp>
18#include <boost/spirit/home/support/info.hpp>
19#include <boost/spirit/home/support/has_semantic_action.hpp>
20#include <boost/spirit/home/support/handles_container.hpp>
21#include <boost/fusion/include/at.hpp>
22
23namespace boost { namespace spirit
24{
25    ///////////////////////////////////////////////////////////////////////////
26    // Enablers
27    ///////////////////////////////////////////////////////////////////////////
28    template <>
29    struct use_operator<qi::domain, proto::tag::address_of> // enables &p
30      : mpl::true_ {};
31}}
32
33namespace boost { namespace spirit { namespace qi
34{
35    template <typename Subject>
36    struct and_predicate : unary_parser<and_predicate<Subject> >
37    {
38        typedef Subject subject_type;
39
40        template <typename Context, typename Iterator>
41        struct attribute
42        {
43            typedef unused_type type;
44        };
45
46        and_predicate(Subject const& subject)
47          : subject(subject) {}
48
49        template <typename Iterator, typename Context
50          , typename Skipper, typename Attribute>
51        bool parse(Iterator& first, Iterator const& last
52          , Context& context, Skipper const& skipper
53          , Attribute& /*attr*/) const
54        {
55            Iterator i = first;
56            return subject.parse(i, last, context, skipper, unused);
57        }
58
59        template <typename Context>
60        info what(Context& context) const
61        {
62            return info("and-predicate", subject.what(context));
63        }
64
65        Subject subject;
66    };
67
68    ///////////////////////////////////////////////////////////////////////////
69    // Parser generators: make_xxx function (objects)
70    ///////////////////////////////////////////////////////////////////////////
71    template <typename Elements, typename Modifiers>
72    struct make_composite<proto::tag::address_of, Elements, Modifiers>
73      : make_unary_composite<Elements, and_predicate>
74    {};
75}}}
76
77namespace boost { namespace spirit { namespace traits
78{
79    ///////////////////////////////////////////////////////////////////////////
80    template <typename Subject>
81    struct has_semantic_action<qi::and_predicate<Subject> >
82      : unary_has_semantic_action<Subject> {};
83
84    ///////////////////////////////////////////////////////////////////////////
85    template <typename Subject, typename Attribute, typename Context
86      , typename Iterator>
87    struct handles_container<qi::and_predicate<Subject>, Attribute, Context
88      , Iterator>
89      : unary_handles_container<Subject, Attribute, Context, Iterator> {};
90}}}
91
92#endif