ClosureIteratorIterator

An extended IteratorIterator that applies a closure transformation to each element during iteration.

This class allows applying a transformation function dynamically while iterating over an existing Traversable.

Usage Example:

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• Full name: \FastForward\Iterator\ClosureIteratorIterator
• Parent class: \FastForward\Iterator\CountableIteratorIterator

Methods

__construct

Initializes the ClosureIteratorIterator.

public __construct(iterable $iterator, \Closure $closure): mixed

Parameters:

Parameter	Type	Description
$iterator	iterable	the underlying iterator to wrap
$closure	\Closure	the transformation function applied to each element

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current

Returns the current transformed element.

public current(): mixed

The closure is applied to the original current element of the iterator.

Return Value:

the transformed element

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Inherited methods

count

Counts the number of elements exposed by the inner iterator.

public count(): int

If the inner iterator implements

• See: \Countable, this method SHALL return the value provided by that implementation. Otherwise, it MUST count elements by iterating over the iterator. If the inner iterator is not cloneable, this method SHALL wrap the current object in an

• See: \IteratorIterator instance and count through that wrapper to avoid performing an invalid clone operation. If the inner iterator is cloneable, this method SHOULD count over a clone so that the original iterator state is preserved as much as possible.

Return Value:

the total number of elements available from the inner iterator

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