1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
|
// Copyright (c) 2001-2011 Hartmut Kaiser
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#if !defined(BOOST_SPIRIT_KARMA_AUTO_NOV_29_2009_0339PM)
#define BOOST_SPIRIT_KARMA_AUTO_NOV_29_2009_0339PM
#if defined(_MSC_VER)
#pragma once
#endif
#include <boost/spirit/home/support/common_terminals.hpp>
#include <boost/spirit/home/support/info.hpp>
#include <boost/spirit/home/support/container.hpp>
#include <boost/spirit/home/support/assert_msg.hpp>
#include <boost/spirit/home/support/detail/hold_any.hpp>
#include <boost/spirit/home/karma/domain.hpp>
#include <boost/spirit/home/karma/meta_compiler.hpp>
#include <boost/spirit/home/karma/delimit_out.hpp>
#include <boost/spirit/home/karma/generator.hpp>
#include <boost/spirit/home/karma/auto/create_generator.hpp>
#include <boost/mpl/bool.hpp>
///////////////////////////////////////////////////////////////////////////////
namespace boost { namespace spirit
{
///////////////////////////////////////////////////////////////////////////
// Enablers
///////////////////////////////////////////////////////////////////////////
template <>
struct use_terminal<karma::domain, tag::auto_> // enables auto_
: mpl::true_ {};
template <typename A0>
struct use_terminal<karma::domain // enables auto_(...)
, terminal_ex<tag::auto_, fusion::vector1<A0> >
> : mpl::true_ {};
template <> // enables auto_(f)
struct use_lazy_terminal<
karma::domain, tag::auto_, 1 /*arity*/
> : mpl::true_ {};
}}
///////////////////////////////////////////////////////////////////////////////
namespace boost { namespace spirit { namespace karma
{
#ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
using spirit::auto_;
#endif
using spirit::auto_type;
///////////////////////////////////////////////////////////////////////////
template <typename Modifiers>
struct auto_generator
: generator<auto_generator<Modifiers> >
{
typedef mpl::int_<generator_properties::all_properties> properties;
template <typename Context, typename Unused>
struct attribute
{
typedef spirit::basic_hold_any<char> type;
};
auto_generator(Modifiers const& modifiers)
: modifiers_(modifiers) {}
// auto_generator has an attached attribute
template <
typename OutputIterator, typename Context, typename Delimiter
, typename Attribute>
bool generate(OutputIterator& sink, Context& context
, Delimiter const& d, Attribute const& attr) const
{
return compile<karma::domain>(create_generator<Attribute>(), modifiers_)
.generate(sink, context, d, attr);
}
// this auto_generator has no attribute attached, it needs to have been
// initialized from a value/variable
template <typename OutputIterator, typename Context
, typename Delimiter>
static bool
generate(OutputIterator&, Context&, Delimiter const&, unused_type)
{
// It is not possible (doesn't make sense) to use auto_ generators
// without providing any attribute, as the generator doesn't 'know'
// what to output. The following assertion fires if this situation
// is detected in your code.
BOOST_SPIRIT_ASSERT_MSG(false, auto_not_usable_without_attribute, ());
return false;
}
template <typename Context>
info what(Context& /*context*/) const
{
return info("auto_");
}
Modifiers modifiers_;
};
///////////////////////////////////////////////////////////////////////////
template <typename T, typename Modifiers>
struct lit_auto_generator
: generator<lit_auto_generator<T, Modifiers> >
{
typedef mpl::int_<generator_properties::all_properties> properties;
template <typename Context, typename Unused>
struct attribute
{
typedef unused_type type;
};
lit_auto_generator(typename add_reference<T>::type t, Modifiers const& modifiers)
: t_(t)
, generator_(compile<karma::domain>(create_generator<T>(), modifiers))
{}
// auto_generator has an attached attribute
template <
typename OutputIterator, typename Context, typename Delimiter
, typename Attribute>
bool generate(OutputIterator& sink, Context& context
, Delimiter const& d, Attribute const&) const
{
return generator_.generate(sink, context, d, t_);
}
template <typename Context>
info what(Context& /*context*/) const
{
return info("auto_");
}
typedef typename spirit::result_of::create_generator<T>::type
generator_type;
typedef typename spirit::result_of::compile<
karma::domain, generator_type, Modifiers>::type generator_impl_type;
T t_;
generator_impl_type generator_;
private:
// silence MSVC warning C4512: assignment operator could not be generated
lit_auto_generator& operator= (lit_auto_generator const&);
};
///////////////////////////////////////////////////////////////////////////
// Generator generators: make_xxx function (objects)
///////////////////////////////////////////////////////////////////////////
// auto_
template <typename Modifiers>
struct make_primitive<tag::auto_, Modifiers>
{
typedef auto_generator<Modifiers> result_type;
result_type operator()(unused_type, Modifiers const& modifiers) const
{
return result_type(modifiers);
}
};
// auto_(...)
template <typename Modifiers, typename A0>
struct make_primitive<
terminal_ex<tag::auto_, fusion::vector1<A0> >, Modifiers>
{
typedef typename add_const<A0>::type const_attribute;
typedef lit_auto_generator<const_attribute, Modifiers> result_type;
template <typename Terminal>
result_type operator()(Terminal const& term, Modifiers const& modifiers) const
{
return result_type(fusion::at_c<0>(term.args), modifiers);
}
};
}}}
#endif
|
