//File chset.h

#ifndef CHSETH
#define CHSETH

#include <iostream.h>
#include "concglob.h"

class chset {
  public:
    chset(const char* s=NULL);
    ~chset();
    boolean in(char ch) const;
    void incl(char ch);
    void operator<(char ch);
    friend chset operator+(const chset& c1,const chset& c2);
    friend ostream& operator<<(ostream& co,const chset& c);
    chset& operator=(const chset& c);
  private:
	 char* set;
};


#endif