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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_NO_DELIMIT_JAN_19_2010_0920AM) | |
7 | #define BOOST_SPIRIT_KARMA_NO_DELIMIT_JAN_19_2010_0920AM | |
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/auxiliary/lazy.hpp> | |
18 | #include <boost/spirit/home/support/unused.hpp> | |
19 | #include <boost/spirit/home/support/common_terminals.hpp> | |
20 | #include <boost/spirit/home/support/has_semantic_action.hpp> | |
21 | #include <boost/spirit/home/support/handles_container.hpp> | |
22 | #include <boost/spirit/home/karma/detail/attributes.hpp> | |
23 | #include <boost/spirit/home/support/info.hpp> | |
24 | ||
25 | namespace boost { namespace spirit | |
26 | { | |
27 | /////////////////////////////////////////////////////////////////////////// | |
28 | // Enablers | |
29 | /////////////////////////////////////////////////////////////////////////// | |
30 | template <> | |
31 | struct use_directive<karma::domain, tag::no_delimit> // enables no_delimit[] | |
32 | : mpl::true_ {}; | |
33 | ||
34 | }} | |
35 | ||
36 | namespace boost { namespace spirit { namespace karma | |
37 | { | |
38 | #ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS | |
39 | using spirit::no_delimit; | |
40 | #endif | |
41 | using spirit::no_delimit_type; | |
42 | ||
43 | /////////////////////////////////////////////////////////////////////////// | |
44 | // The no_delimit generator is used for no_delimit[...] directives. | |
45 | /////////////////////////////////////////////////////////////////////////// | |
46 | template <typename Subject> | |
47 | struct no_delimit_generator | |
48 | : unary_generator<no_delimit_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 | no_delimit_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 no_delimit 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 | // the difference to verbatim[] is that this does not post-delimit | |
72 | return subject.generate(sink, ctx, unused_delimiter(d), attr); | |
73 | } | |
74 | ||
75 | template <typename Context> | |
76 | info what(Context& context) const | |
77 | { | |
78 | return info("no_delimit", 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::no_delimit, Subject, Modifiers> | |
89 | { | |
90 | typedef no_delimit_generator<Subject> result_type; | |
91 | ||
92 | result_type | |
93 | operator()(unused_type, Subject const& subject, unused_type) const | |
94 | { | |
95 | return result_type(subject); | |
96 | } | |
97 | }; | |
98 | ||
99 | }}} | |
100 | ||
101 | namespace boost { namespace spirit { namespace traits | |
102 | { | |
103 | /////////////////////////////////////////////////////////////////////////// | |
104 | template <typename Subject> | |
105 | struct has_semantic_action<karma::no_delimit_generator<Subject> > | |
106 | : unary_has_semantic_action<Subject> {}; | |
107 | ||
108 | /////////////////////////////////////////////////////////////////////////// | |
109 | template <typename Subject, typename Attribute, typename Context | |
110 | , typename Iterator> | |
111 | struct handles_container<karma::no_delimit_generator<Subject>, Attribute | |
112 | , Context, Iterator> | |
113 | : unary_handles_container<Subject, Attribute, Context, Iterator> {}; | |
114 | }}} | |
115 | ||
116 | #endif |