com.oracle.truffle.regex.tregex.matchers

Class BitSetMatcher

java.lang.Object

com.oracle.truffle.api.nodes.Node

com.oracle.truffle.regex.tregex.matchers.CharMatcher

com.oracle.truffle.regex.tregex.matchers.InvertibleCharMatcher

com.oracle.truffle.regex.tregex.matchers.BitSetMatcher

All Implemented Interfaces:

com.oracle.truffle.api.nodes.NodeInterface, Cloneable

public abstract class BitSetMatcher
extends InvertibleCharMatcher

Matcher that matches multiple characters with a common high byte using a bit set.
Example: characters တ, ဠ, ူ have a common high byte 0x10, so they are matched by this high byte and a bit set that matches 0x10, 0x20 and 0x30.

Nested Class Summary

Nested classes/interfaces inherited from class com.oracle.truffle.api.nodes.Node

com.oracle.truffle.api.nodes.Node.Child, com.oracle.truffle.api.nodes.Node.Children

Field Summary

Fields inherited from class com.oracle.truffle.regex.tregex.matchers.CharMatcher

EMPTY

Method Summary

Modifier and Type	Method and Description
static InvertibleCharMatcher	create(boolean invert, int highByte, long[] bitSet) Constructs a new bit-set-based character matcher.
int	estimatedCost() Conservatively estimate the equivalent number of integer comparisons of calling CharMatcher.execute(int).
long[]	getBitSet()
boolean	match(int c)
String	toString()

Methods inherited from class com.oracle.truffle.regex.tregex.matchers.InvertibleCharMatcher

modifiersToString, result

Methods inherited from class com.oracle.truffle.regex.tregex.matchers.CharMatcher

execute

Methods inherited from class com.oracle.truffle.api.nodes.Node

accept, adoptChildren, atomic, atomic, copy, deepCopy, getChildren, getCost, getDebugProperties, getDescription, getEncapsulatingSourceSection, getLock, getParent, getRootNode, getSourceSection, insert, insert, isAdoptable, isSafelyReplaceableBy, lookupContextReference, lookupLanguageReference, notifyInserted, onReplace, replace, replace, reportPolymorphicSpecialize

Methods inherited from class java.lang.Object

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

Method Detail

create

public static InvertibleCharMatcher create(boolean invert,
                                           int highByte,
                                           long[] bitSet)

Constructs a new bit-set-based character matcher.

Parameters:

invert - see InvertibleCharMatcher.

highByte - the high byte common to all characters to match.

bitSet - the bit set to match the low byte of the characters to match.

Returns:

a new BitSetMatcher or a NullHighByteBitSetMatcher.

getBitSet

public long[] getBitSet()

match

public boolean match(int c)

estimatedCost

public int estimatedCost()

Description copied from class: CharMatcher

Conservatively estimate the equivalent number of integer comparisons of calling CharMatcher.execute(int).

Specified by:

estimatedCost in class CharMatcher

Returns:

the number of integer comparisons one call to CharMatcher.execute(int) is roughly equivalent to. Array loads are treated as two comparisons.

toString

public String toString()

Overrides:

toString in class com.oracle.truffle.api.nodes.Node