com.singularsys.jep.configurableparser

Class Lookahead2Iterator<E>

java.lang.Object

com.singularsys.jep.configurableparser.Lookahead2Iterator<E>

Direct Known Subclasses:

LookaheadNIterator

public class Lookahead2Iterator<E>
extends java.lang.Object

An iterator which stores the next two tokens.

Constructor Summary

Constructors

Constructor and Description
Lookahead2Iterator() Default constructor.
Lookahead2Iterator(java.util.Iterator<E> input) Decerator constructor around an iterator
Lookahead2Iterator(java.util.List<E> input) Constructor when the list of tokens is known beforehand.

Method Summary

Modifier and Type	Method and Description
void	consume() Eat one token.
E	nextnext()
E	peekNext()
E	prev() Return the token just consumed.
void	setInputIterator(java.util.Iterator<E> input) Should be called if the default constructor is used.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

Lookahead2Iterator

public Lookahead2Iterator()

Default constructor. If this constructor is used then the setInputIterator(Iterator) method should be called.

Since:

3.5

Lookahead2Iterator

public Lookahead2Iterator(java.util.List<E> input)

Constructor when the list of tokens is known beforehand.

Parameters:

input - the list of tokens

Lookahead2Iterator

public Lookahead2Iterator(java.util.Iterator<E> input)

Decerator constructor around an iterator

Parameters:

input - the input itterator

Method Detail

setInputIterator

public void setInputIterator(java.util.Iterator<E> input)

Should be called if the default constructor is used.

Parameters:

input - the new input itterator

Since:

3.5

peekNext

public E peekNext()

nextnext

public E nextnext()

prev

public E prev()

Return the token just consumed.

Returns:

the token, or null if no token consumed.

Since:

Jep 3.5

consume

public void consume()

Eat one token.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object