java_cup

Class parse_action_row

public class parse_action_row extends Object

This class represents one row (corresponding to one machine state) of the parse action table.
Field Summary
intdefault_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.
protected static int_size
Number of columns (terminals) in every row.
Constructor Summary
parse_action_row()
Simple constructor.
Method Summary
static voidclear()
voidcompute_default()
Compute the default (reduce) action for this row and store it in default_reduce.
static intsize()
Number of columns (terminals) in every row.

Field Detail

default_reduce

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

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.

_size

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

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

clear

public static void clear()

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).

size

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