1// Copyright (c) 2001-2011 Hartmut Kaiser
2//
3// Distributed under the Boost Software License, Version 1.0. (See accompanying
4// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
5
6#if !defined(BOOST_SPIRIT_KARMA_VERBATIM_MAR_02_2007_0303PM)
7#define BOOST_SPIRIT_KARMA_VERBATIM_MAR_02_2007_0303PM
8
9#if defined(_MSC_VER)
10#pragma once
11#endif
12
13#include <boost/spirit/home/karma/meta_compiler.hpp>
14#include <boost/spirit/home/karma/generator.hpp>
15#include <boost/spirit/home/karma/domain.hpp>
16#include <boost/spirit/home/karma/detail/unused_delimiter.hpp>
17#include <boost/spirit/home/karma/delimit_out.hpp>
18#include <boost/spirit/home/karma/auxiliary/lazy.hpp>
19#include <boost/spirit/home/support/unused.hpp>
20#include <boost/spirit/home/support/common_terminals.hpp>
21#include <boost/spirit/home/support/has_semantic_action.hpp>
22#include <boost/spirit/home/support/handles_container.hpp>
23#include <boost/spirit/home/karma/detail/attributes.hpp>
24#include <boost/spirit/home/support/info.hpp>
25
26namespace boost { namespace spirit
27{
28 ///////////////////////////////////////////////////////////////////////////
29 // Enablers
30 ///////////////////////////////////////////////////////////////////////////
31 template <>
32 struct use_directive<karma::domain, tag::verbatim> // enables verbatim[]
33 : mpl::true_ {};
34
35}}
36
37namespace boost { namespace spirit { namespace karma
38{
39#ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
40 using spirit::verbatim;
41#endif
42 using spirit::verbatim_type;
43
44 ///////////////////////////////////////////////////////////////////////////
45 // The verbatim generator is used for verbatim[...] directives.
46 ///////////////////////////////////////////////////////////////////////////
47 template <typename Subject>
48 struct verbatim_generator : unary_generator<verbatim_generator<Subject> >
49 {
50 typedef Subject subject_type;
51 typedef typename subject_type::properties properties;
52
53 template <typename Context, typename Iterator>
54 struct attribute
55 : traits::attribute_of<subject_type, Context, Iterator>
56 {};
57
58 verbatim_generator(Subject const& subject)
59 : subject(subject) {}
60
61 template <typename OutputIterator, typename Context, typename Delimiter
62 , typename Attribute>
63 bool generate(OutputIterator& sink, Context& ctx, Delimiter const& d
64 , Attribute const& attr) const
65 {
66 // the verbatim generator simply dispatches to the embedded
67 // generator while supplying unused_delimiter as the new delimiter
68 // to avoid delimiting down the generator stream
69 typedef detail::unused_delimiter<Delimiter> unused_delimiter;
70
71 return subject.generate(sink, ctx, unused_delimiter(d), attr) &&
72 karma::delimit_out(sink, d); // always do post-delimiting
73 }
74
75 template <typename Context>
76 info what(Context& context) const
77 {
78 return info("verbatim", subject.what(context));
79 }
80
81 Subject subject;
82 };
83
84 ///////////////////////////////////////////////////////////////////////////
85 // Generator generators: make_xxx function (objects)
86 ///////////////////////////////////////////////////////////////////////////
87 template <typename Subject, typename Modifiers>
88 struct make_directive<tag::verbatim, Subject, Modifiers>
89 {
90 typedef verbatim_generator<Subject> result_type;
91 result_type operator()(unused_type, Subject const& subject, unused_type) const
92 {
93 return result_type(subject);
94 }
95 };
96
97}}}
98
99namespace boost { namespace spirit { namespace traits
100{
101 ///////////////////////////////////////////////////////////////////////////
102 template <typename Subject>
103 struct has_semantic_action<karma::verbatim_generator<Subject> >
104 : unary_has_semantic_action<Subject> {};
105
106 ///////////////////////////////////////////////////////////////////////////
107 template <typename Subject, typename Attribute, typename Context
108 , typename Iterator>
109 struct handles_container<karma::verbatim_generator<Subject>, Attribute
110 , Context, Iterator>
111 : unary_handles_container<Subject, Attribute, Context, Iterator> {};
112}}}
113
114#endif
115

source code of boost/libs/spirit/include/boost/spirit/home/karma/directive/verbatim.hpp