forked from funkey/util
-
Notifications
You must be signed in to change notification settings - Fork 0
/
ProgramOptions.h
231 lines (163 loc) · 4.88 KB
/
ProgramOptions.h
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
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
#ifndef COMMANDLINEPARSER_H_
#define COMMANDLINEPARSER_H_
#include <iostream>
#include <sstream>
#include <string>
#include <set>
#include <map>
#include <boost/filesystem.hpp>
#include <boost/lexical_cast.hpp>
#include <boost/parameter.hpp>
#include <boost/program_options.hpp>
#include <util/typename.h>
namespace util {
// forward declarations
template <typename TargetType>
class OptionConverter;
class program_option_impl;
// for sorting in the option set
struct is_less {
bool operator()(program_option_impl* left, program_option_impl* right);
};
BOOST_PARAMETER_NAME(module)
BOOST_PARAMETER_NAME(long_name)
BOOST_PARAMETER_NAME(short_name)
BOOST_PARAMETER_NAME(description_text)
BOOST_PARAMETER_NAME(argument_sketch)
BOOST_PARAMETER_NAME(default_value)
BOOST_PARAMETER_NAME(is_positional)
class ProgramOptions {
public:
static void init(int argc, char** argv);
static bool isOptionSet(const program_option_impl& option);
static std::string getOptionValue(const program_option_impl& option);
static void addProgramOption(program_option_impl* option);
static void printUsage();
private:
ProgramOptions() {};
static void readFromFile(boost::filesystem::path configFile, boost::program_options::variables_map& values);
static std::set<program_option_impl*, is_less>* Options;
static std::set<std::string>* KnownLongParams;
static std::map<const program_option_impl*, std::string> Values;
static boost::program_options::options_description* CommandLineOptions;
static boost::program_options::positional_options_description* Positional;
static boost::program_options::options_description* ConfigFileOptions;
static std::string BinaryName;
};
class program_option_impl {
public:
template <class ArgumentPack>
program_option_impl(const ArgumentPack& args) :
_moduleName(args[_module | ""]),
_longParam(args[_long_name]),
_shortParam(args[_short_name | ""]),
_description(args[_description_text | ""]),
_argumentSketch(args[_argument_sketch | ""]),
_defaultValue(boost::lexical_cast<std::string>(args[_default_value | "0"])),
_isPositional(args[_is_positional | false]) {
ProgramOptions::addProgramOption(this);
}
std::string getModuleName() const;
std::string getLongParam() const;
std::string getShortParam() const;
std::string getDescription() const;
std::string getArgumentSketch() const;
std::string getDefaultValue() const;
bool isPositional() const;
/**
* Defines a lexicographic order on command line
* options.
*/
bool operator<(program_option_impl* right);
/**
* Implicit conversion to ValueType. This allows to convert the value of
* the program option into whatever type you expect. For instance, you
* can write for a ProgramOption fooOption
*
* int foo = fooOption;
*
* as long as the argument given to fooOption can be converted to int
* (otherwise, an exception will be thrown).
*
* This conversion also allows to check if an option is set. The implicit
* conversion to bool ensures:
*
* if (fooOption) {
*
* // fooOption is set to a value different to 'false'
*
* } else {
*
* // fooOption was not set or set to 'false'
* }
*/
template <typename ValueType>
operator ValueType() const {
OptionConverter<ValueType> converter;
return converter(*this);
}
/**
* Explicit conversion to ValueType.
*/
template <typename ValueType>
ValueType as() {
OptionConverter<ValueType> converter;
return converter(*this);
}
private:
std::string _moduleName;
std::string _longParam;
std::string _shortParam;
std::string _description;
std::string _argumentSketch;
std::string _defaultValue;
bool _isPositional;
};
class ProgramOption : public program_option_impl {
public:
BOOST_PARAMETER_CONSTRUCTOR(
ProgramOption,
(program_option_impl),
tag,
(required
(long_name, *))
(optional
(short_name, *)
(module, *)
(description_text, *)
(argument_sketch, *)))
};
/**
* Default type conversion for options. Tries to cast the value string to the
* desired type.
*/
template <typename TargetType>
struct OptionConverter {
TargetType operator()(const program_option_impl& option) const {
return boost::lexical_cast<TargetType>(ProgramOptions::getOptionValue(option));
}
};
/**
* Template specialisation for conversions to bool. Returns true, iff the
* option is set and its value is not 'false'.
*/
template <>
struct OptionConverter<bool> {
bool operator()(const program_option_impl& option) const {
// option is not set
if (!ProgramOptions::isOptionSet(option)) {
// is its default "true"?
if (boost::lexical_cast<bool>(ProgramOptions::getOptionValue(option)))
return true;
// otherwise, we say false
return false;
}
if (ProgramOptions::getOptionValue(option) == "false")
return false;
return true;
}
};
std::ostream&
operator<<(std::ostream& os, program_option_impl& option);
} // namespace util
#endif /*COMMANDLINEPARSER_H_*/