source: trunk/c++_tools/utility/Option.h @ 601

#ifndef _theplu_utility_option_
#define _theplu_utility_option_

// $Id: Option.h 601 2006-08-29 01:45:59Z peter $
/*
  Copyright (C) 2006 Peter Johansson

  This file is part of the thep c++ tools library,
                                http://lev.thep.lu.se/trac/c++_tools

  The c++ tools library is free software; you can redistribute it
  and/or modify it under the terms of the GNU General Public License
  as published by the Free Software Foundation; either version 2 of
  the License, or (at your option) any later version.

  The c++ tools library is distributed in the hope that it will be
  useful, but WITHOUT ANY WARRANTY; without even the implied warranty
  of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  02111-1307, USA.
*/
#include <string>


namespace theplu {
namespace utility {

  ///
  /// @brief Container of variables for an option. @see CommandLine
  ///
  class Option
  {
  public:

    ///
    /// different types of arguments to an option
    ///
    enum argument_type {
      no_arg, string_arg, int_arg, double_arg
    };


    /// 
    /// @brief Constructor 
    /// 
    /// @param short_name one character key such as 'h' for -h flag
    /// @param long_name string key such as "help" for --help flag
    /// @param telling what kind argument this option expects
    /// @param desc string used in help display
    ///
    Option(char short_name, std::string long_name, 
           argument_type arg, std::string desc); 
           

    ///
    /// @return argument type for option
    ///
    inline const argument_type& arg_type(void) const { return arg_type_; }
    
    ///
    /// @return long name unless long name is empty in which case the
    /// short one character name is returned.
    ///
    inline std::string name(void) const 
    { return !long_name_.empty() ? long_name_ : std::string(&short_name_) ; }

    ///
    /// @return short name
    ///
    inline char short_name(void) const { return short_name_; }

    ///
    /// @return long name
    ///
    inline const std::string& long_name(void) const { return long_name_; }

    ///
    /// sends output to std::cerr of type
    ///
    /// -v, --verbose  explain what is going on
    ///
    void print(void) const;

    ///
    /// @return true if option has been detected in parsing
    ///
    inline bool& present(void) { return present_; }

    ///
    /// @return argument value
    ///
    inline std::string& value(void) { return value_; }


  private:
    argument_type arg_type_;
    std::string long_name_;
    std::string mess_;
    char short_name_;
    bool present_;
    std::string value_;
  };




} // end of namespace utility
} // end of namespace theplu

#endif