gi
Class LR0_Grammar.Context

java.lang.Object
  gi.Grammar.Production
      gi.LR0_Grammar.Context

Direct Known Subclasses:

LR1_Grammar.Context

Enclosing class:

LR0_Grammar

static class LR0_Grammar.Context

extends Grammar.Production

This class implements an LR(0) Context.

Version:

1.2

Author:

© 1999-2004 Craig A. Rich <carich@csupomona.edu>

Field Summary

(package private) Object	A The nonterminal on the left side of this Production.
(package private) Object[]	beta The phrase on the right side of this Production.
(package private) int	lookahead The lookahead position in this LR(0) Context.
(package private) int	serial The serial number of this Production.

Constructor Summary

(package private)

LR0_Grammar.Context(Grammar.Production p, int lookahead) Constructs an LR(0) Context.

Method Summary

String

toString() Returns the string representation of this LR(0) Context.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

lookahead

int lookahead

The lookahead position in this LR(0) Context.

A

Object A

The nonterminal on the left side of this Production.

beta

Object[] beta

The phrase on the right side of this Production.

serial

int serial

The serial number of this Production. It is the priority of this Production when resolving parse conflicts.

Constructor Detail

LR0_Grammar.Context

LR0_Grammar.Context(Grammar.Production p,
                    int lookahead)

Constructs an LR(0) Context.

Parameters:

p - the Production in this Context.

lookahead - the lookahead position in this Context.

Method Detail

toString

public String toString()

Returns the string representation of this LR(0) Context.

Overrides:

toString in class Grammar.Production

Returns:

the string representation of this Context.