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
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
// Copyright Vladimir Prus 2002-2004.
// 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)
#ifndef BOOST_VARIABLES_MAP_VP_2003_05_19
#define BOOST_VARIABLES_MAP_VP_2003_05_19
#include <boost/program_options/config.hpp>
#include <boost/any.hpp>
#include <boost/shared_ptr.hpp>
#include <string>
#include <map>
#include <set>
namespace boost { namespace program_options {
template<class charT>
class basic_parsed_options;
class value_semantic;
class variables_map;
// forward declaration
/** Stores in 'm' all options that are defined in 'options'.
If 'm' already has a non-defaulted value of an option, that value
is not changed, even if 'options' specify some value.
*/
BOOST_PROGRAM_OPTIONS_DECL
void store(const basic_parsed_options<char>& options, variables_map& m,
bool utf8 = false);
/** Stores in 'm' all options that are defined in 'options'.
If 'm' already has a non-defaulted value of an option, that value
is not changed, even if 'options' specify some value.
This is wide character variant.
*/
BOOST_PROGRAM_OPTIONS_DECL
void store(const basic_parsed_options<wchar_t>& options,
variables_map& m);
/** Runs all 'notify' function for options in 'm'. */
BOOST_PROGRAM_OPTIONS_DECL void notify(variables_map& m);
/** Class holding value of option. Contains details about how the
value is set and allows to conveniently obtain the value.
*/
class BOOST_PROGRAM_OPTIONS_DECL variable_value {
public:
variable_value() : m_defaulted(false) {}
variable_value(const boost::any& v, bool defaulted)
: v(v), m_defaulted(defaulted)
{}
/** If stored value if of type T, returns that value. Otherwise,
throws boost::bad_any_cast exception. */
template<class T>
const T& as() const {
return boost::any_cast<const T&>(v);
}
/** @overload */
template<class T>
T& as() {
return boost::any_cast<T&>(v);
}
/// Returns true if no value is stored.
bool empty() const;
/** Returns true if the value was not explicitly
given, but has default value. */
bool defaulted() const;
/** Returns the contained value. */
const boost::any& value() const;
/** Returns the contained value. */
boost::any& value();
private:
boost::any v;
bool m_defaulted;
// Internal reference to value semantic. We need to run
// notifications when *final* values of options are known, and
// they are known only after all sources are stored. By that
// time options_description for the first source might not
// be easily accessible, so we need to store semantic here.
shared_ptr<const value_semantic> m_value_semantic;
friend BOOST_PROGRAM_OPTIONS_DECL
void store(const basic_parsed_options<char>& options,
variables_map& m, bool);
friend BOOST_PROGRAM_OPTIONS_DECL class variables_map;
};
/** Implements string->string mapping with convenient value casting
facilities. */
class BOOST_PROGRAM_OPTIONS_DECL abstract_variables_map {
public:
abstract_variables_map();
abstract_variables_map(const abstract_variables_map* next);
virtual ~abstract_variables_map() {}
/** Obtains the value of variable 'name', from *this and
possibly from the chain of variable maps.
- if there's no value in *this.
- if there's next variable map, returns value from it
- otherwise, returns empty value
- if there's defaulted value
- if there's next varaible map, which has a non-defauled
value, return that
- otherwise, return value from *this
- if there's a non-defauled value, returns it.
*/
const variable_value& operator[](const std::string& name) const;
/** Sets next variable map, which will be used to find
variables not found in *this. */
void next(abstract_variables_map* next);
private:
/** Returns value of variable 'name' stored in *this, or
empty value otherwise. */
virtual const variable_value& get(const std::string& name) const = 0;
const abstract_variables_map* m_next;
};
/** Concrete variables map which store variables in real map.
This class is derived from std::map<std::string, variable_value>,
so you can use all map operators to examine its content.
*/
class BOOST_PROGRAM_OPTIONS_DECL variables_map : public abstract_variables_map,
public std::map<std::string, variable_value>
{
public:
variables_map();
variables_map(const abstract_variables_map* next);
// Resolve conflict between inherited operators.
const variable_value& operator[](const std::string& name) const
{ return abstract_variables_map::operator[](name); }
void notify();
private:
/** Implementation of abstract_variables_map::get
which does 'find' in *this. */
const variable_value& get(const std::string& name) const;
/** Names of option with 'final' values -- which should not
be changed by subsequence assignments. */
std::set<std::string> m_final;
friend BOOST_PROGRAM_OPTIONS_DECL
void store(const basic_parsed_options<char>& options,
variables_map& xm,
bool utf8);
/** Names of required options, filled by parser which has
access to options_description. */
std::set<std::string> m_required;
};
/*
* Templates/inlines
*/
inline bool
variable_value::empty() const
{
return v.empty();
}
inline bool
variable_value::defaulted() const
{
return m_defaulted;
}
inline
const boost::any&
variable_value::value() const
{
return v;
}
inline
boost::any&
variable_value::value()
{
return v;
}
}}
#endif
|
Swift