// Token.java

/**
 * The Token class is the superclass of tokens generated by the parser.
 * Tokens are consumed by implementations of the TextMeter interface.
 *
 * @author Fredrik Kilander for ID1006
 */
public class Token {

  /**
   * Holds the characters in this token.
   */
  protected StringBuffer sb;

  /**
   * Creates a new token, initialized to the empty string.
   */
  public Token () {
    sb = new StringBuffer ();
  }

  /**
   * Creates a new token, initialized to the first character given.
   *
   * @param c The first character in the new token.
   */
  public Token (char c) {
    sb = new StringBuffer ();
    add (c);
  }

  /**
   * Appends a character to the token.j
   *
   * @param c The character to append to the token.
   */
  public void add (char c) {
    sb.append (c);
  }

  /**
   * Returns the string in the token.
   */
  public String toString () {
    return sb.toString ();
  }

} // class Token