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comparison: src/commandline.h

src/commandline.h

changeset 141
68d60e2cfa76
parent 139
cf11621ae422
equal deleted inserted replaced
140:04a6eb68f226 141:68d60e2cfa76
39 private: 39 private:
40 char _shortform; 40 char _shortform;
41 String _longform; 41 String _longform;
42 String _description; 42 String _description;
43 std::type_info const* _type; 43 std::type_info const* _type;
44 void* _ptr; 44
45 union PointerUnion
46 {
47 int* asInt;
48 long* asLong;
49 char* asChar;
50 bool* asBool;
51 String* asString;
52 double* asDouble;
53
54 PointerUnion (int* a) : asInt (a) {}
55 PointerUnion (bool* a) : asBool (a) {}
56 PointerUnion (String* a) : asString (a) {}
57 PointerUnion (double* a) : asDouble (a) {}
58 PointerUnion (long* a) : asLong (a) {}
59 PointerUnion (char* a) : asChar (a) {}
60
61 void setValue (int const& a) { *asInt = a; }
62 void setValue (bool const& a) { *asBool = a; }
63 void setValue (String const& a) { *asString = a; }
64 void setValue (double const& a) { *asDouble = a; }
65 void setValue (long const& a) { *asLong = a; }
66 void setValue (char const& a) { *asChar = a; }
67 } _ptr;
45 68
46 public: 69 public:
47 template<typename T> 70 template<typename T>
48 CommandLineOption (T& data, char shortform, const char* longform, const char* description) : 71 CommandLineOption (T& data, char shortform, const char* longform, const char* description) :
49 _shortform (shortform), 72 _shortform (shortform),
85 inline char shortform() const 108 inline char shortform() const
86 { 109 {
87 return _shortform; 110 return _shortform;
88 } 111 }
89 112
90 inline void* pointer() const 113 inline PointerUnion& pointer()
91 { 114 {
92 return _ptr; 115 return _ptr;
93 } 116 }
94 117
95 template<typename T> 118 template<typename T>
97 { 120 {
98 return &typeid(T) == _type; 121 return &typeid(T) == _type;
99 } 122 }
100 123
101 virtual void handleValue (String const& a); 124 virtual void handleValue (String const& a);
125 virtual String describeArgument() const;
126 virtual String describeExtra() const { return ""; }
102 }; 127 };
103 128
129 // _________________________________________________________________________________________________
130 //
104 template<typename T> 131 template<typename T>
105 class EnumeratedCommandLineOption : public CommandLineOption 132 class EnumeratedCommandLineOption : public CommandLineOption
106 { 133 {
107 StringList _values; 134 StringList _values;
108 135
109 public: 136 public:
137 using ValueType = typename std::underlying_type<T>::type;
138
110 EnumeratedCommandLineOption (T& data, char shortform, const char* longform, 139 EnumeratedCommandLineOption (T& data, char shortform, const char* longform,
111 const char* description) : 140 const char* description) :
112 CommandLineOption (data, shortform, longform, description) 141 CommandLineOption (reinterpret_cast<ValueType&> (data), shortform,
113 { 142 longform, description)
143 {
144 // Store values
114 for (int i = 0; i < int (T::NumValues); ++i) 145 for (int i = 0; i < int (T::NumValues); ++i)
115 { 146 {
116 String value = MakeFormatArgument (T (i)).toLowercase(); 147 String value = MakeFormatArgument (T (i)).toLowercase();
117 int pos; 148 int pos;
118 149
125 156
126 virtual void handleValue (String const& value) override 157 virtual void handleValue (String const& value) override
127 { 158 {
128 String const lowvalue (value.toLowercase()); 159 String const lowvalue (value.toLowercase());
129 160
130 for (int i = 0; i < _values.size(); ++i) 161 for (ValueType i = 0; i < _values.size(); ++i)
131 { 162 {
132 if (_values[i].toLowercase() == lowvalue) 163 if (_values[i] == lowvalue)
133 { 164 {
134 *reinterpret_cast<T*> (pointer()) = T (i); 165 pointer().setValue (i);
135 return; 166 return;
136 } 167 }
137 } 168 }
138 169
139 error ("bad value passed to %1 (%2), valid values are: %3", describe(), value, _values); 170 error ("bad value passed to %1 (%2), valid values are: %3", describe(), value, _values);
171 }
172
173 virtual String describeArgument() const
174 {
175 return "ENUM";
176 }
177
178 StringList const& validValues() const
179 {
180 return _values;
181 }
182
183 virtual String describeExtra() const
184 {
185 return format ("Valid values for %1: %2", describe(), validValues());
140 } 186 }
141 }; 187 };
142 188
143 // _________________________________________________________________________________________________ 189 // _________________________________________________________________________________________________
144 // 190 //
151 CommandLine() = default; 197 CommandLine() = default;
152 ~CommandLine(); 198 ~CommandLine();
153 template<typename Enum> 199 template<typename Enum>
154 void addEnumeratedOption (Enum& e, char shortform, const char* longform, 200 void addEnumeratedOption (Enum& e, char shortform, const char* longform,
155 const char* description); 201 const char* description);
156 void addOption (CommandLineOption* option); 202 String describeOptions() const;
157 StringList process (int argc, char* argv[]); 203 StringList process (const int argc, char* argv[]);
158 204
159 template<typename... Args> 205 template<typename... Args>
160 void addOption (Args... args) 206 void addOption (Args&&... args)
161 { 207 {
162 addOption (new CommandLineOption (args...)); 208 _options << new CommandLineOption (args...);
163 } 209 }
164 }; 210 };
165 211
166 // _________________________________________________________________________________________________ 212 // _________________________________________________________________________________________________
167 // 213 //
168 template<typename Enum> 214 template<typename Enum>
169 void CommandLine::addEnumeratedOption (Enum& e, char shortform, const char* longform, 215 void CommandLine::addEnumeratedOption (Enum& e, char shortform, const char* longform,
170 const char* description) 216 const char* description)
171 { 217 {
172 static_assert(std::is_enum<Enum>::value, "addEnumeratedOption requires a named enumerator"); 218 static_assert(std::is_enum<Enum>::value, "addEnumeratedOption requires a named enumerator");
173 auto enumoption = new EnumeratedCommandLineOption<Enum> (e, shortform, longform, 219 _options << new EnumeratedCommandLineOption<Enum> (e, shortform, longform,
174 description); 220 description);
175 addOption (static_cast<CommandLineOption*> (enumoption));
176 } 221 }

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