#ifndef _WORDSTREAMITERATOR_H
#define _WORDSTREAMITERATOR_H

// Owen Astrachan 7/3/95
//
// class WordStreamIterator
//
// void Open(astring name)
//        -- initializes iterator to file specified by name
//
// void First(), void Next(), bool IsDone()
//        -- "standard" iterating functions (see below)
//
// usage: call First(), before accessing Current()
//        call Next() to move to  the next word in the stream
//        call Current() to access the current word
//
// astring Current()
//        -- returns current astring (see below)
//
// words are retrieved from stream until sentinel LAST_WORD is encountered
// this sentinel word is read from the stream.  Once read, IsDone()
// will return true.
//
// properties:
//
// if IsDone() == false, then accessing the current word
//   is a valid operation; access is provided by the member
//   function Current()
//
// if IsDone() == true, then accessing the current word is
//   NOT a valid operation
//
//

#include <string>
#include <fstream>
using namespace std;

class WordStreamIterator
{
  public:
    WordStreamIterator();
    void Open(string name);            // bind stream to specific text file
    void Init  ();                     // initialize iterator
    string Current();                  // returns current word
    bool HasMore();                    // true if more words
    void Next();                       // advance to next word

  private:
    string myWord;                     // the current word
    bool myMore;                       // true if more words
    ifstream myInput;                  // the stream to read from
};

#endif