java_cup
Class parse_action_row

java.lang.Object
  java_cup.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

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

parse_action_row()
Simple constructor.

Method Summary

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).