nonassoc_action.java

package java_cup ;


/**
 * This class represents a shift/reduce nonassociative error within the parse
 * table. If action_table element is assign to type nonassoc_action, it cannot
 * be changed, and signifies that there is a conflict between shifting and
 * reducing a production and a terminal that shouldn't be next to each other.
 * 
 * @version last updated: 7/2/96
 * @author Frank Flannery
 */
public class nonassoc_action extends parse_action
{
  /*-----------------------------------------------------------*/
  /*--- Constructor(s) ----------------------------------------*/
  /*-----------------------------------------------------------*/
  /**
   * Simple constructor.
   */
  public nonassoc_action ( ) throws internal_error
  {
    /* don't need to set anything, since it signifies error */
  }


  /*-----------------------------------------------------------*/
  /*--- General Methods ---------------------------------------*/
  /*-----------------------------------------------------------*/
  /** Quick access to type of action. */
  public int kind ( )
  {
    return NONASSOC ;
  }


  /* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . */
  /** Equality test. */
  public boolean equals ( parse_action other )
  {
    return other != null && other.kind ( ) == NONASSOC ;
  }


  /* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . */
  /** Generic equality test. */
  public boolean equals ( Object other )
  {
    if ( other instanceof parse_action )
      return equals ( ( parse_action ) other ) ;
    else return false ;
  }


  /* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . */
  /** Compute a hash code. */
  public int hashCode ( )
  {
    /* all objects of this class hash together */
    return 0xCafe321 ;
  }


  /** Convert to string. */
  public String toString ( )
  {
    return "NONASSOC" ;
  }
  /*-----------------------------------------------------------*/
}