1. 

  2. package com.sun.java_cup.internal;

  3. 

  4. /** This class represents a shift/reduce nonassociative error within the 

  5.  *  parse table.  If action_table element is assign to type

  6.  *  nonassoc_action, it cannot be changed, and signifies that there 

  7.  *  is a conflict between shifting and reducing a production and a

  8.  *  terminal that shouldn't be next to each other.

  9.  *

  10.  * @version last updated: 7/2/96

  11.  * @author  Frank Flannery

  12.  */

  13. public class nonassoc_action extends parse_action {

  14.  

  15.   /*-----------------------------------------------------------*/

  16.   /*--- Constructor(s) ----------------------------------------*/

  17.   /*-----------------------------------------------------------*/

  18. 

  19.   /** Simple constructor. 

  20.    */

  21.   public nonassoc_action() throws internal_error

  22.     {

  23. 	/* don't need to set anything, since it signifies error */

  24.     }

  25. 

  26.     /*-----------------------------------------------------------*/

  27.   /*--- General Methods ---------------------------------------*/

  28.   /*-----------------------------------------------------------*/

  29. 

  30.   /** Quick access to type of action. */

  31.   public int kind() {return NONASSOC;}

  32. 

  33.   /*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/

  34. 

  35.   /** Equality test. */

  36.   public boolean equals(parse_action other)

  37.     {

  38.       return other != null && other.kind() == NONASSOC;

  39.     }

  40. 

  41.   /*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/

  42. 

  43.   /** Generic equality test. */

  44.   public boolean equals(Object other)

  45.     {

  46.       if (other instanceof parse_action)

  47. 	return equals((parse_action)other);

  48.       else

  49.        return false;

  50.     }

  51. 

  52.   /*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/

  53. 

  54.   /** Compute a hash code. */

  55.   public int hashCode()

  56.     {

  57.       /* all objects of this class hash together */

  58.       return 0xCafe321;

  59.     }

  60. 

  61. 

  62. 

  63.   /** Convert to string. */

  64.   public String toString() 

  65.     {

  66.       return "NONASSOC";

  67.     }

  68. 

  69.   /*-----------------------------------------------------------*/

  70. 

  71. }