Package java_cup

Class parse_action_row


  • public class parse_action_row
    extends java.lang.Object
    This class represents one row (corresponding to one machine state) of the parse action table.
    • Field Summary

      Fields 
      Modifier and Type Field Description
      protected static int _size
      Number of columns (terminals) in every row.
      int default_reduce
      Default (reduce) action for this row.
      protected static int[] reduction_count
      Table of reduction counts (reused by compute_default()).
      parse_action[] under_term
      Actual action entries for the row.
    • Constructor Summary

      Constructors 
      Constructor Description
      parse_action_row()
      Simple constructor.
    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void compute_default()
      Compute the default (reduce) action for this row and store it in default_reduce.
      static int size()
      Number of columns (terminals) in every row.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Field Detail

      • _size

        protected static int _size
        Number of columns (terminals) in every row.
      • reduction_count

        protected static int[] reduction_count
        Table of reduction counts (reused by compute_default()).
      • under_term

        public parse_action[] under_term
        Actual action entries for the row.
      • default_reduce

        public int default_reduce
        Default (reduce) action for this row. -1 will represent default of error.
    • Constructor Detail

      • parse_action_row

        public parse_action_row()
        Simple constructor. Note: this should not be used until the number of terminals in the grammar has been established.
    • Method Detail

      • size

        public static int size()
        Number of columns (terminals) in every row.
      • compute_default

        public void compute_default()
        Compute the default (reduce) action for this row and store it in default_reduce. In the case of non-zero default we will have the effect of replacing all errors by that reduction. This may cause us to do erroneous reduces, but will never cause us to shift past the point of the error and never cause an incorrect parse. -1 will be used to encode the fact that no reduction can be used as a default (in which case error will be used).