com.oracle.truffle.regex.tregex.matchers

Class MultiBitSetMatcher

java.lang.Object

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

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

com.oracle.truffle.regex.tregex.matchers.MultiBitSetMatcher

public final class MultiBitSetMatcher
extends InvertibleCharMatcher

Character matcher that uses an array of 256 bit sets to fully cover the 16 bit character space. This matcher can take up to 8 kilobytes of space, so it should be used only when the set of characters to match is very large and sparse.

Method Summary

Modifier and Type	Method and Description
int	estimatedCost() Conservatively estimate the equivalent number of integer comparisons of calling CharMatcher.match(int).
static MultiBitSetMatcher	fromRanges(boolean inverse, ImmutableSortedListOfIntRanges cps)
boolean	match(int c) Check if a given code point matches this CharMatcher.
String	toString()

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

modifiersToString, result, result

Methods inherited from class java.lang.Object

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

Method Detail

fromRanges

public static MultiBitSetMatcher fromRanges(boolean inverse,
                                            ImmutableSortedListOfIntRanges cps)

match

public boolean match(int c)

Description copied from class: CharMatcher

Check if a given code point matches this CharMatcher.

Specified by:

match in class CharMatcher

Parameters:

c - any code point.

Returns:

true if the character matches.

See Also:

CompilerDirectives.isPartialEvaluationConstant(Object)

estimatedCost

public int estimatedCost()

Description copied from class: CharMatcher

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

Specified by:

estimatedCost in class CharMatcher

Returns:

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

toString

public String toString()

Overrides:

toString in class Object