2 /******************************************************************************
4 * file: UnlabeledValueArg.h
6 * Copyright (c) 2003, Michael E. Smoot .
7 * Copyright (c) 2004, Michael E. Smoot, Daniel Aarno.
10 * See the file COPYING in the top directory of this distribution for
13 * THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS
14 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
16 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
18 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
19 * DEALINGS IN THE SOFTWARE.
21 *****************************************************************************/
24 #ifndef TCLAP_UNLABELED_VALUE_ARGUMENT_H
25 #define TCLAP_UNLABELED_VALUE_ARGUMENT_H
30 #include <tclap/ValueArg.h>
31 #include <tclap/OptionalUnlabeledTracker.h>
37 * The basic unlabeled argument that parses a value.
38 * This is a template class, which means the type T defines the type
39 * that a given object will attempt to parse when an UnlabeledValueArg
40 * is reached in the list of args that the CmdLine iterates over.
43 class UnlabeledValueArg : public ValueArg<T>
46 // If compiler has two stage name lookup (as gcc >= 3.4 does)
47 // this is required to prevent undef. symbols
48 using ValueArg<T>::_ignoreable;
49 using ValueArg<T>::_hasBlanks;
50 using ValueArg<T>::_extractValue;
51 using ValueArg<T>::_typeDesc;
52 using ValueArg<T>::_name;
53 using ValueArg<T>::_description;
54 using ValueArg<T>::_alreadySet;
55 using ValueArg<T>::toString;
60 * UnlabeledValueArg constructor.
61 * \param name - A one word name for the argument. Note that this is used for
62 * identification, not as a long flag.
63 * \param desc - A description of what the argument is for or
65 * \param req - Whether the argument is required on the command
67 * \param value - The default value assigned to this argument if it
68 * is not present on the command line.
69 * \param typeDesc - A short, human readable description of the
70 * type that this object expects. This is used in the generation
71 * of the USAGE statement. The goal is to be helpful to the end user
73 * \param ignoreable - Allows you to specify that this argument can be
74 * ignored if the '--' flag is set. This defaults to false (cannot
75 * be ignored) and should generally stay that way unless you have
76 * some special need for certain arguments to be ignored.
77 * \param v - Optional Visitor. You should leave this blank unless
78 * you have a very good reason.
80 UnlabeledValueArg( const std::string& name,
81 const std::string& desc,
84 const std::string& typeDesc,
85 bool ignoreable = false,
89 * UnlabeledValueArg constructor.
90 * \param name - A one word name for the argument. Note that this is used for
91 * identification, not as a long flag.
92 * \param desc - A description of what the argument is for or
94 * \param req - Whether the argument is required on the command
96 * \param value - The default value assigned to this argument if it
97 * is not present on the command line.
98 * \param typeDesc - A short, human readable description of the
99 * type that this object expects. This is used in the generation
100 * of the USAGE statement. The goal is to be helpful to the end user
102 * \param parser - A CmdLine parser object to add this Arg to
103 * \param ignoreable - Allows you to specify that this argument can be
104 * ignored if the '--' flag is set. This defaults to false (cannot
105 * be ignored) and should generally stay that way unless you have
106 * some special need for certain arguments to be ignored.
107 * \param v - Optional Visitor. You should leave this blank unless
108 * you have a very good reason.
110 UnlabeledValueArg( const std::string& name,
111 const std::string& desc,
114 const std::string& typeDesc,
115 CmdLineInterface& parser,
116 bool ignoreable = false,
120 * UnlabeledValueArg constructor.
121 * \param name - A one word name for the argument. Note that this is used for
122 * identification, not as a long flag.
123 * \param desc - A description of what the argument is for or
125 * \param req - Whether the argument is required on the command
127 * \param value - The default value assigned to this argument if it
128 * is not present on the command line.
129 * \param constraint - A pointer to a Constraint object used
130 * to constrain this Arg.
131 * \param ignoreable - Allows you to specify that this argument can be
132 * ignored if the '--' flag is set. This defaults to false (cannot
133 * be ignored) and should generally stay that way unless you have
134 * some special need for certain arguments to be ignored.
135 * \param v - Optional Visitor. You should leave this blank unless
136 * you have a very good reason.
138 UnlabeledValueArg( const std::string& name,
139 const std::string& desc,
142 Constraint<T>* constraint,
143 bool ignoreable = false,
148 * UnlabeledValueArg constructor.
149 * \param name - A one word name for the argument. Note that this is used for
150 * identification, not as a long flag.
151 * \param desc - A description of what the argument is for or
153 * \param req - Whether the argument is required on the command
155 * \param value - The default value assigned to this argument if it
156 * is not present on the command line.
157 * \param constraint - A pointer to a Constraint object used
158 * to constrain this Arg.
159 * \param parser - A CmdLine parser object to add this Arg to
160 * \param ignoreable - Allows you to specify that this argument can be
161 * ignored if the '--' flag is set. This defaults to false (cannot
162 * be ignored) and should generally stay that way unless you have
163 * some special need for certain arguments to be ignored.
164 * \param v - Optional Visitor. You should leave this blank unless
165 * you have a very good reason.
167 UnlabeledValueArg( const std::string& name,
168 const std::string& desc,
171 Constraint<T>* constraint,
172 CmdLineInterface& parser,
173 bool ignoreable = false,
177 * Handles the processing of the argument.
178 * This re-implements the Arg version of this method to set the
179 * _value of the argument appropriately. Handling specific to
180 * unlabeled arguments.
181 * \param i - Pointer the the current argument in the list.
182 * \param args - Mutable list of strings.
184 virtual bool processArg(int* i, std::vector<std::string>& args);
187 * Overrides shortID for specific behavior.
189 virtual std::string shortID(const std::string& val="val") const;
192 * Overrides longID for specific behavior.
194 virtual std::string longID(const std::string& val="val") const;
197 * Overrides operator== for specific behavior.
199 virtual bool operator==(const Arg& a ) const;
202 * Instead of pushing to the front of list, push to the back.
203 * \param argList - The list to add this to.
205 virtual void addToList( std::list<Arg*>& argList ) const;
210 * Constructor implementation.
213 UnlabeledValueArg<T>::UnlabeledValueArg(const std::string& name,
214 const std::string& desc,
217 const std::string& typeDesc,
220 : ValueArg<T>("", name, desc, req, val, typeDesc, v)
222 _ignoreable = ignoreable;
224 OptionalUnlabeledTracker::check(req, toString());
229 UnlabeledValueArg<T>::UnlabeledValueArg(const std::string& name,
230 const std::string& desc,
233 const std::string& typeDesc,
234 CmdLineInterface& parser,
237 : ValueArg<T>("", name, desc, req, val, typeDesc, v)
239 _ignoreable = ignoreable;
240 OptionalUnlabeledTracker::check(req, toString());
245 * Constructor implementation.
248 UnlabeledValueArg<T>::UnlabeledValueArg(const std::string& name,
249 const std::string& desc,
252 Constraint<T>* constraint,
255 : ValueArg<T>("", name, desc, req, val, constraint, v)
257 _ignoreable = ignoreable;
258 OptionalUnlabeledTracker::check(req, toString());
262 UnlabeledValueArg<T>::UnlabeledValueArg(const std::string& name,
263 const std::string& desc,
266 Constraint<T>* constraint,
267 CmdLineInterface& parser,
270 : ValueArg<T>("", name, desc, req, val, constraint, v)
272 _ignoreable = ignoreable;
273 OptionalUnlabeledTracker::check(req, toString());
278 * Implementation of processArg().
281 bool UnlabeledValueArg<T>::processArg(int *i, std::vector<std::string>& args)
287 if ( _hasBlanks( args[*i] ) )
290 // never ignore an unlabeled arg
292 _extractValue( args[*i] );
298 * Overriding shortID for specific output.
301 std::string UnlabeledValueArg<T>::shortID(const std::string& val) const
303 static_cast<void>(val); // Ignore input, don't warn
304 return std::string("<") + _typeDesc + ">";
308 * Overriding longID for specific output.
311 std::string UnlabeledValueArg<T>::longID(const std::string& val) const
313 static_cast<void>(val); // Ignore input, don't warn
315 // Ideally we would like to be able to use RTTI to return the name
316 // of the type required for this argument. However, g++ at least,
317 // doesn't appear to return terribly useful "names" of the types.
318 return std::string("<") + _typeDesc + ">";
322 * Overriding operator== for specific behavior.
325 bool UnlabeledValueArg<T>::operator==(const Arg& a ) const
327 if ( _name == a.getName() || _description == a.getDescription() )
334 void UnlabeledValueArg<T>::addToList( std::list<Arg*>& argList ) const
336 argList.push_back( const_cast<Arg*>(static_cast<const Arg* const>(this)) );