Package org.parboiled.matchervisitors

Class FollowMatchersVisitor

java.lang.Object

org.parboiled.matchervisitors.DefaultMatcherVisitor<Boolean>

org.parboiled.matchervisitors.FollowMatchersVisitor

All Implemented Interfaces:

MatcherVisitor<Boolean>

public class FollowMatchersVisitor
extends DefaultMatcherVisitor<Boolean>

Collects the matchers that can legally follow the given matcher according to the grammar into a given list. The visitor returns true if the collected matchers are all possible followers, and false if other matchers higher up the rule stack can also follow.

Constructor Summary

Constructors

Constructor	Description
FollowMatchersVisitor()

Method Summary

Modifier and Type	Method	Description
Boolean	defaultValue(AbstractMatcher matcher)	Returns the default value for all visiting methods that have not been overridden.
List<Matcher>	getFollowMatchers(MatcherContext currentContext)
Boolean	visit(OneOrMoreMatcher matcher)
Boolean	visit(SequenceMatcher matcher)
Boolean	visit(ZeroOrMoreMatcher matcher)

Methods inherited from class org.parboiled.matchervisitors.DefaultMatcherVisitor

visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

FollowMatchersVisitor

public FollowMatchersVisitor()

Method Details

getFollowMatchers

public List<Matcher> getFollowMatchers(MatcherContext currentContext)

visit

public Boolean visit(OneOrMoreMatcher matcher)

Specified by:

visit in interface MatcherVisitor<Boolean>

Overrides:

visit in class DefaultMatcherVisitor<Boolean>

visit

public Boolean visit(SequenceMatcher matcher)

Specified by:

visit in interface MatcherVisitor<Boolean>

Overrides:

visit in class DefaultMatcherVisitor<Boolean>

visit

public Boolean visit(ZeroOrMoreMatcher matcher)

Specified by:

visit in interface MatcherVisitor<Boolean>

Overrides:

visit in class DefaultMatcherVisitor<Boolean>

defaultValue

public Boolean defaultValue(AbstractMatcher matcher)

Description copied from class: DefaultMatcherVisitor

Returns the default value for all visiting methods that have not been overridden.

Overrides:

defaultValue in class DefaultMatcherVisitor<Boolean>

Parameters:

matcher - the matcher

Returns:

the return value (null by default)