gi
Class Lexicon.Range

java.lang.Object
  gi.Lexicon.Expression
      gi.Lexicon.Alphabet
          gi.Lexicon.Range

Enclosing class:

Lexicon

protected static class Lexicon.Range

extends Lexicon.Alphabet

This class implements an Alphabet containing the characters in a range.

Version:

1.2

Author:

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

Field Summary

private char	a1 The first character in the range.
private char	a2 The last character in the range.

Fields inherited from class gi.Lexicon.Expression

f, i

Constructor Summary

Lexicon.Range(char a1, char a2)
Constructs an Alphabet containing the characters in a range, and builds the NFA constructed from this Expression.

Method Summary

(package private) boolean	contains(char a) Indicates whether a character occurs in this Alphabet.
(package private) Lexicon.Expression	copy() Creates a copy of this Alphabet, and replicates the NFA constructed from this Expression.

Methods inherited from class java.lang.Object

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

Field Detail

a1

private final char a1

The first character in the range.

a2

private final char a2

The last character in the range.

Constructor Detail

Lexicon.Range

public Lexicon.Range(char a1,
                     char a2)

Constructs an Alphabet containing the characters in a range, and builds the NFA constructed from this Expression.

Parameters:

a1 - the first character in the range.

a2 - the last character in the range.

Method Detail

contains

boolean contains(char a)

Indicates whether a character occurs in this Alphabet.

Specified by:

contains in class Lexicon.Alphabet

Parameters:

a - the character whose status is requested.

Returns:

true if a occurs in this Alphabet; false otherwise.

copy

Lexicon.Expression copy()

Creates a copy of this Alphabet, and replicates the NFA constructed from this Expression.

Specified by:

copy in class Lexicon.Expression

Returns:

a copy of this Alphabet.