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/******************************************************************************
*
* file: UnlabeledValueArg.h
*
* Copyright (c) 2003, Michael E. Smoot .
* Copyright (c) 2004, Michael E. Smoot, Daniel Aarno.
* All rights reserved.
*
* See the file COPYING in the top directory of this distribution for
* more information.
*
* THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
*****************************************************************************/
#ifndef TCLAP_UNLABELED_VALUE_ARGUMENT_H
#define TCLAP_UNLABELED_VALUE_ARGUMENT_H
#include <string>
#include <vector>
#include <tclap/ValueArg.h>
#include <tclap/OptionalUnlabeledTracker.h>
namespace TCLAP {
/**
* The basic unlabeled argument that parses a value.
* This is a template class, which means the type T defines the type
* that a given object will attempt to parse when an UnlabeledValueArg
* is reached in the list of args that the CmdLine iterates over.
*/
template<class T>
class UnlabeledValueArg : public ValueArg<T>
{
// If compiler has two stage name lookup (as gcc >= 3.4 does)
// this is required to prevent undef. symbols
using ValueArg<T>::_ignoreable;
using ValueArg<T>::_hasBlanks;
using ValueArg<T>::_extractValue;
using ValueArg<T>::_typeDesc;
using ValueArg<T>::_name;
using ValueArg<T>::_description;
using ValueArg<T>::_alreadySet;
using ValueArg<T>::toString;
public:
/**
* UnlabeledValueArg constructor.
* \param name - A one word name for the argument. Note that this is used for
* identification, not as a long flag.
* \param desc - A description of what the argument is for or
* does.
* \param req - Whether the argument is required on the command
* line.
* \param value - The default value assigned to this argument if it
* is not present on the command line.
* \param typeDesc - A short, human readable description of the
* type that this object expects. This is used in the generation
* of the USAGE statement. The goal is to be helpful to the end user
* of the program.
* \param ignoreable - Allows you to specify that this argument can be
* ignored if the '--' flag is set. This defaults to false (cannot
* be ignored) and should generally stay that way unless you have
* some special need for certain arguments to be ignored.
* \param v - Optional Visitor. You should leave this blank unless
* you have a very good reason.
*/
UnlabeledValueArg( const std::string& name,
const std::string& desc,
bool req,
T value,
const std::string& typeDesc,
bool ignoreable = false,
Visitor* v = NULL);
/**
* UnlabeledValueArg constructor.
* \param name - A one word name for the argument. Note that this is used for
* identification, not as a long flag.
* \param desc - A description of what the argument is for or
* does.
* \param req - Whether the argument is required on the command
* line.
* \param value - The default value assigned to this argument if it
* is not present on the command line.
* \param typeDesc - A short, human readable description of the
* type that this object expects. This is used in the generation
* of the USAGE statement. The goal is to be helpful to the end user
* of the program.
* \param parser - A CmdLine parser object to add this Arg to
* \param ignoreable - Allows you to specify that this argument can be
* ignored if the '--' flag is set. This defaults to false (cannot
* be ignored) and should generally stay that way unless you have
* some special need for certain arguments to be ignored.
* \param v - Optional Visitor. You should leave this blank unless
* you have a very good reason.
*/
UnlabeledValueArg( const std::string& name,
const std::string& desc,
bool req,
T value,
const std::string& typeDesc,
CmdLineInterface& parser,
bool ignoreable = false,
Visitor* v = NULL );
/**
* UnlabeledValueArg constructor.
* \param name - A one word name for the argument. Note that this is used for
* identification, not as a long flag.
* \param desc - A description of what the argument is for or
* does.
* \param req - Whether the argument is required on the command
* line.
* \param value - The default value assigned to this argument if it
* is not present on the command line.
* \param constraint - A pointer to a Constraint object used
* to constrain this Arg.
* \param ignoreable - Allows you to specify that this argument can be
* ignored if the '--' flag is set. This defaults to false (cannot
* be ignored) and should generally stay that way unless you have
* some special need for certain arguments to be ignored.
* \param v - Optional Visitor. You should leave this blank unless
* you have a very good reason.
*/
UnlabeledValueArg( const std::string& name,
const std::string& desc,
bool req,
T value,
Constraint<T>* constraint,
bool ignoreable = false,
Visitor* v = NULL );
/**
* UnlabeledValueArg constructor.
* \param name - A one word name for the argument. Note that this is used for
* identification, not as a long flag.
* \param desc - A description of what the argument is for or
* does.
* \param req - Whether the argument is required on the command
* line.
* \param value - The default value assigned to this argument if it
* is not present on the command line.
* \param constraint - A pointer to a Constraint object used
* to constrain this Arg.
* \param parser - A CmdLine parser object to add this Arg to
* \param ignoreable - Allows you to specify that this argument can be
* ignored if the '--' flag is set. This defaults to false (cannot
* be ignored) and should generally stay that way unless you have
* some special need for certain arguments to be ignored.
* \param v - Optional Visitor. You should leave this blank unless
* you have a very good reason.
*/
UnlabeledValueArg( const std::string& name,
const std::string& desc,
bool req,
T value,
Constraint<T>* constraint,
CmdLineInterface& parser,
bool ignoreable = false,
Visitor* v = NULL);
/**
* Handles the processing of the argument.
* This re-implements the Arg version of this method to set the
* _value of the argument appropriately. Handling specific to
* unlabeled arguments.
* \param i - Pointer the the current argument in the list.
* \param args - Mutable list of strings.
*/
virtual bool processArg(int* i, std::vector<std::string>& args);
/**
* Overrides shortID for specific behavior.
*/
virtual std::string shortID(const std::string& val="val") const;
/**
* Overrides longID for specific behavior.
*/
virtual std::string longID(const std::string& val="val") const;
/**
* Overrides operator== for specific behavior.
*/
virtual bool operator==(const Arg& a ) const;
/**
* Instead of pushing to the front of list, push to the back.
* \param argList - The list to add this to.
*/
virtual void addToList( std::list<Arg*>& argList ) const;
};
/**
* Constructor implementation.
*/
template<class T>
UnlabeledValueArg<T>::UnlabeledValueArg(const std::string& name,
const std::string& desc,
bool req,
T val,
const std::string& typeDesc,
bool ignoreable,
Visitor* v)
: ValueArg<T>("", name, desc, req, val, typeDesc, v)
{
_ignoreable = ignoreable;
OptionalUnlabeledTracker::check(req, toString());
}
template<class T>
UnlabeledValueArg<T>::UnlabeledValueArg(const std::string& name,
const std::string& desc,
bool req,
T val,
const std::string& typeDesc,
CmdLineInterface& parser,
bool ignoreable,
Visitor* v)
: ValueArg<T>("", name, desc, req, val, typeDesc, v)
{
_ignoreable = ignoreable;
OptionalUnlabeledTracker::check(req, toString());
parser.add( this );
}
/**
* Constructor implementation.
*/
template<class T>
UnlabeledValueArg<T>::UnlabeledValueArg(const std::string& name,
const std::string& desc,
bool req,
T val,
Constraint<T>* constraint,
bool ignoreable,
Visitor* v)
: ValueArg<T>("", name, desc, req, val, constraint, v)
{
_ignoreable = ignoreable;
OptionalUnlabeledTracker::check(req, toString());
}
template<class T>
UnlabeledValueArg<T>::UnlabeledValueArg(const std::string& name,
const std::string& desc,
bool req,
T val,
Constraint<T>* constraint,
CmdLineInterface& parser,
bool ignoreable,
Visitor* v)
: ValueArg<T>("", name, desc, req, val, constraint, v)
{
_ignoreable = ignoreable;
OptionalUnlabeledTracker::check(req, toString());
parser.add( this );
}
/**
* Implementation of processArg().
*/
template<class T>
bool UnlabeledValueArg<T>::processArg(int *i, std::vector<std::string>& args)
{
if ( _alreadySet )
return false;
if ( _hasBlanks( args[*i] ) )
return false;
// never ignore an unlabeled arg
_extractValue( args[*i] );
_alreadySet = true;
return true;
}
/**
* Overriding shortID for specific output.
*/
template<class T>
std::string UnlabeledValueArg<T>::shortID(const std::string& val) const
{
static_cast<void>(val); // Ignore input, don't warn
return std::string("<") + _typeDesc + ">";
}
/**
* Overriding longID for specific output.
*/
template<class T>
std::string UnlabeledValueArg<T>::longID(const std::string& val) const
{
static_cast<void>(val); // Ignore input, don't warn
// Ideally we would like to be able to use RTTI to return the name
// of the type required for this argument. However, g++ at least,
// doesn't appear to return terribly useful "names" of the types.
return std::string("<") + _typeDesc + ">";
}
/**
* Overriding operator== for specific behavior.
*/
template<class T>
bool UnlabeledValueArg<T>::operator==(const Arg& a ) const
{
if ( _name == a.getName() || _description == a.getDescription() )
return true;
else
return false;
}
template<class T>
void UnlabeledValueArg<T>::addToList( std::list<Arg*>& argList ) const
{
argList.push_back( const_cast<Arg*>(static_cast<const Arg* const>(this)) );
}
}
#endif
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