1/*=============================================================================
2 Copyright (c) 2014 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#ifndef BOOST_SPIRIT_X3_DIRECTIVE_RAW_HPP
8#define BOOST_SPIRIT_X3_DIRECTIVE_RAW_HPP
9
10#include <boost/spirit/home/x3/core/skip_over.hpp>
11#include <boost/spirit/home/x3/core/parser.hpp>
12#include <boost/spirit/home/x3/support/traits/move_to.hpp>
13#include <boost/spirit/home/x3/support/traits/pseudo_attribute.hpp>
14#include <boost/range/iterator_range_core.hpp>
15
16namespace boost { namespace spirit { namespace x3
17{
18 // this is a pseudo attribute type indicating that the parser wants the
19 // iterator range pointing to the [first, last) matching characters from
20 // the input iterators.
21 struct raw_attribute_type {};
22
23 template <typename Subject>
24 struct raw_directive : unary_parser<Subject, raw_directive<Subject>>
25 {
26 typedef unary_parser<Subject, raw_directive<Subject> > base_type;
27 typedef raw_attribute_type attribute_type;
28 static bool const handles_container = true;
29 typedef Subject subject_type;
30
31 constexpr raw_directive(Subject const& subject)
32 : base_type(subject) {}
33
34 template <typename Iterator, typename Context
35 , typename RContext, typename Attribute>
36 bool parse(Iterator& first, Iterator const& last
37 , Context const& context, RContext& rcontext, Attribute& attr) const
38 {
39 x3::skip_over(first, last, context);
40 Iterator i = first;
41 if (this->subject.parse(i, last, context, rcontext, unused))
42 {
43 traits::move_to(first, i, attr);
44 first = i;
45 return true;
46 }
47 return false;
48 }
49
50 template <typename Iterator, typename Context, typename RContext>
51 bool parse(Iterator& first, Iterator const& last
52 , Context const& context, RContext& rcontext, unused_type) const
53 {
54 return this->subject.parse(first, last, context, rcontext, unused);
55 }
56 };
57
58 struct raw_gen
59 {
60 template <typename Subject>
61 constexpr raw_directive<typename extension::as_parser<Subject>::value_type>
62 operator[](Subject const& subject) const
63 {
64 return { as_parser(subject) };
65 }
66 };
67
68 constexpr auto raw = raw_gen{};
69
70 namespace traits
71 {
72 template <typename Context, typename Iterator>
73 struct pseudo_attribute<Context, raw_attribute_type, Iterator>
74 {
75 using attribute_type = raw_attribute_type;
76 using type = boost::iterator_range<Iterator>;
77
78 static type call(Iterator& first, Iterator const& last, attribute_type)
79 {
80 return { first, last };
81 }
82 };
83 }
84}}}
85
86#endif
87

source code of boost/libs/spirit/include/boost/spirit/home/x3/directive/raw.hpp