EmptyMatcher

java.lang.Object

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

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

public final class EmptyMatcher extends CharMatcher

A character matcher that never matches.

Constructor Summary

Constructors

Constructor

Description

EmptyMatcher()
Method Summary

Modifier and Type

Method

Description

static EmptyMatcher

create()

static CharMatcher

create(boolean invert)

int

estimatedCost()

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

boolean

match(int c)

Check if a given code point matches this CharMatcher.

String

toString()

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details
- EmptyMatcher
  
  public EmptyMatcher()
Method Details
- create
  
  public static EmptyMatcher create()
- create
  
  public static CharMatcher create(boolean invert)
- 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