<?php

namespace Amp;

/**
 * A NullCancellation can be used to avoid conditionals to check whether a cancellation has been provided.
 *
 * Instead of writing
 *
 * ```php
 * if ($cancellation) {
 *     $cancellation->throwIfRequested();
 * }
 * ```
 *
 * potentially multiple times, it allows writing
 *
 * ```php
 * $cancellation = $cancellation ?? new NullCancellation;
 *
 * // ...
 *
 * $cancellation->throwIfRequested();
 * ```
 *
 * instead.
 */
final class NullCancellation implements Cancellation
{
	public function subscribe(\Closure $callback): string
	{
		return "null-cancellation";
	}


	public function unsubscribe(string $id): void
	{
	}


	public function isRequested(): bool
	{
		return false;
	}


	public function throwIfRequested(): void
	{
	}
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----NTQ0NTYxNjg5NTQ0NjEzNSA4MzIyNjI2NjU3MTI5NTY1IDcyOTMyMDY0MTUyNzUzNDU=