None.php
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None.php
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	<?php

	namespace Keruald\OmniTools\DataTypes\Option;

	use InvalidArgumentException;

	class None extends Option {

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

	public function isNone () : bool {
	return true;
	}

	public function getValue () : mixed {
	throw new InvalidArgumentException(<<<'EOD'
	This option is a none, so it doesn't have a value.
	You can check first with isSome() if this is a value.
	EOD
	);
	}

	public function map (callable $callable) : Option {
	return $this;
	}

	public function or (Option $default) : Option {
	return $default;
	}

	public function orElse (callable $callable) : Option {
	return $callable();
	}

	public function getValueOr (mixed $default) : mixed {
	return $default;
	}

	public function getValueOrElse (callable $callable) : mixed {
	return $callable();
	}

	}