com.oracle.truffle.regex.tregex.matchers

Class EmptyMatcher

java.lang.Object

com.oracle.truffle.api.nodes.Node

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

com.oracle.truffle.regex.tregex.matchers.EmptyMatcher

All Implemented Interfaces:

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

public abstract class EmptyMatcher
extends CharMatcher

A character matcher that never matches.

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

Constructor Summary

Constructors

Constructor and Description
EmptyMatcher()

Method Summary

Modifier and Type	Method and Description
static EmptyMatcher	create()
static CharMatcher	create(boolean invert)
int	estimatedCost() Conservatively estimate the equivalent number of integer comparisons of calling CharMatcher.execute(char, boolean).
String	toString()

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

Constructor Detail

EmptyMatcher

public EmptyMatcher()

Method Detail

create

public static EmptyMatcher create()

create

public static CharMatcher create(boolean invert)

estimatedCost

public int estimatedCost()

Description copied from class: CharMatcher

Conservatively estimate the equivalent number of integer comparisons of calling CharMatcher.execute(char, boolean).

Specified by:

estimatedCost in class CharMatcher

Returns:

the number of integer comparisons one call to CharMatcher.execute(char, boolean) 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