de.unkrig.lfr.core

Class CharacterClass

java.lang.Object

de.unkrig.lfr.core.CharacterClass

public abstract class CharacterClass
extends Object

A CompositeSequence that implements matches(MatcherImpl, int) by applying matches(int) onto itself.

Constructor Summary

Constructors

Constructor and Description
CharacterClass()

Method Summary

Modifier and Type	Method and Description
de.unkrig.lfr.core.Sequence	concat(de.unkrig.lfr.core.Sequence that)
boolean	find(de.unkrig.lfr.core.MatcherImpl matcher, int start) Searches for the next occurrence, and, iff it finds one, updates groups[0] and groups[1], and returns true.
int	lowerBound() matches(int) is guaranteed to return false for all subjects smaller than lowerBound().
abstract boolean	matches(int c)
int	matches(de.unkrig.lfr.core.MatcherImpl matcher, int offset)
de.unkrig.lfr.core.Sequence	reverse()
int	sizeBound()
String	toString() Returns an unambiguous string form of this sequence; practical for verifying a compiled sequence e.g.
protected abstract String	toStringWithoutNext()
int	upperBound() matches(int) is guaranteed to return false for all subjects greater than or equal to upperBound().

Methods inherited from class java.lang.Object

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

Constructor Detail

CharacterClass

public CharacterClass()

Method Detail

matches

public final int matches(de.unkrig.lfr.core.MatcherImpl matcher,
                         int offset)

matches

public abstract boolean matches(int c)

Returns:

Whether c matches this character class

lowerBound

public int lowerBound()

matches(int) is guaranteed to return false for all subjects smaller than lowerBound().

upperBound

public int upperBound()

matches(int) is guaranteed to return false for all subjects greater than or equal to upperBound().

sizeBound

public int sizeBound()

Returns:

The number of values for which matches(int) returns true, or more

concat

public de.unkrig.lfr.core.Sequence concat(de.unkrig.lfr.core.Sequence that)

reverse

public de.unkrig.lfr.core.Sequence reverse()

toStringWithoutNext

protected abstract String toStringWithoutNext()

Returns:

A human-readable form of this sequence, but without the next sequence

toString

public String toString()

Returns an unambiguous string form of this sequence; practical for verifying a compiled sequence e.g. for correctness, efficiency, etc. The syntax resembles Java.

find

public boolean find(de.unkrig.lfr.core.MatcherImpl matcher,
                    int start)

Searches for the next occurrence, and, iff it finds one, updates groups[0] and groups[1], and returns true.