Label.h

#ifndef UTIL_LABEL_H
#define UTIL_LABEL_H

/*
* Util Package - C++ Utilities for Scientific Computation
*
* Copyright 2010 - 2017, The Regents of the University of Minnesota
* Distributed under the terms of the GNU General Public License.
*/

#include <util/global.h>
#include <iostream>
#include <string>
#include <string>

namespace Util
{

   class Label
   {

   public:

      // Static Public Members

      static const int LabelWidth  = 20;

      static void clear();

      static bool isClear();

      static bool isMatched();

      // Non-static Public Members

      explicit Label(bool isRequired = true);

      Label(std::string string, bool isRequired = true);

      Label(const char* string, bool isRequired = true);

      Label(const Label& other);

      virtual ~Label();

      void setString(std::string string);

      bool match(std::istream& in);

      std::string string() const;

      bool isRequired() const;

   private:

      bool isRequired_;

      std::string string_;

   // Static members:

      static bool isClear_;

      static bool isMatched_;

      static std::string input_;

   //friends:

      friend std::istream& operator >> (std::istream& in, Label label);
      friend std::ostream& operator << (std::ostream& out, Label label);

   };

   // Friend function declarations

   std::istream& operator >> (std::istream& in, Label label);

   std::ostream& operator << (std::ostream& out, Label label);

   // Inline functions

   /*
   * Is this label a required component of the file format?
   */
   inline bool Label::isRequired() const
   {  return isRequired_; }

   /*
   * Did the most recent attempt to read match?
   */
   inline bool Label::isMatched()
   {  return isMatched_; }

} 
#endif