com.oracle.truffle.regex.tregex.matchers

Class CharMatcher

java.lang.Object

com.oracle.truffle.api.nodes.Node

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

All Implemented Interfaces:

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

Direct Known Subclasses:

AnyMatcher, EmptyMatcher, InvertibleCharMatcher, ProfilingCharMatcher

public abstract class CharMatcher
extends com.oracle.truffle.api.nodes.Node

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

Modifier and Type	Field and Description
static CharMatcher[]	EMPTY

Constructor Summary

Constructors

Constructor and Description
CharMatcher()

Method Summary

Modifier and Type	Method and Description
abstract int	estimatedCost() Conservatively estimate the equivalent number of integer comparisons of calling CharMatcher.execute(char, boolean).
abstract boolean	execute(char c, boolean compactString) Check if a given character matches this CharMatcher.

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, toString

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY

public static final CharMatcher[] EMPTY

Constructor Detail

CharMatcher

public CharMatcher()

Method Detail

execute

public abstract boolean execute(char c,
                                boolean compactString)

Check if a given character matches this CharMatcher.

Parameters:

c - any character.

compactString - true if c was read from a compact string and can therefore be treated as a byte. This parameter must always be partial evaluation constant!

Returns:

true if the character matches.

See Also:

CompilerDirectives.isPartialEvaluationConstant(Object)

estimatedCost

public abstract int estimatedCost()

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

Returns:

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