INTERFACE I.BidiIterator<Titem> EXTENDS I.Iterator @public

summary

Interface for an iterator that can go in both directions.

	$hasPrevious() bool @public	Returns TRUE when there is an item to fetch with previous().
	$previous() Titem @public	Returns the previous item and advances backwards.
	$peekPreviousSupported() bool @public	Returns TRUE when peekPrevious() is supported.
	$peekPrevious() Titem @public	Returns the previous item without advancing.

Inherited from I.Iterator:
	$hasNext() bool @public	Returns TRUE when there is another item to fetch.
	$next() Titem @public	Returns the next item and advances.
	$peekSupported() bool @public	Returns TRUE when peek() is supported.
	$peek() Titem @public	Returns the next item without advancing.

FUNC $hasPrevious() bool @abstract @public

Returns TRUE when there is an item to fetch with previous().

FUNC $peekPrevious() Titem @abstract @public

Returns the previous item without advancing.

When there is no previous item it throws an E.OutOfRange exception.

This is an optional method, when peeking is not possible it throws an E.Unsupported exception.

Returns TRUE when peekPrevious() is supported.

FUNC $previous() Titem @abstract @public

Returns the previous item and advances backwards.

When there is no previous item it throws an E.OutOfRange exception.

Licensed under the Apache License, Version 2.0. See the LICENSE file or obtain a copy at: http://www.apache.org/licenses/LICENSE-2.0