/
Interval.php
86 lines (70 loc) 路 1.41 KB
/
Interval.php
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<?php
declare(strict_types=1);
namespace Aeon\Calendar\Gregorian;
/**
* @psalm-immutable
*/
final class Interval
{
public const CLOSED = 0;
public const LEFT_OPEN = 1;
public const RIGHT_OPEN = 2;
public const OPEN = 4;
private int $type;
private function __construct(int $type)
{
$this->type = $type;
}
/**
* A <= x <= B.
*
* @psalm-pure
*/
public static function closed() : self
{
return new self(self::CLOSED);
}
/**
* A <= x < B.
*
* @psalm-pure
*/
public static function rightOpen() : self
{
return new self(self::RIGHT_OPEN);
}
/**
* A < x <= B.
*
* @psalm-pure
*/
public static function leftOpen() : self
{
return new self(self::LEFT_OPEN);
}
/**
* A < x < B.
*
* @psalm-pure
*/
public static function open() : self
{
return new self(self::OPEN);
}
public function isOpen() : bool
{
return $this->type === self::OPEN;
}
public function isLeftOpen() : bool
{
return $this->type === self::LEFT_OPEN || $this->type === self::OPEN;
}
public function isRightOpen() : bool
{
return $this->type === self::RIGHT_OPEN || $this->type === self::OPEN;
}
public function isClosed() : bool
{
return $this->type === self::CLOSED;
}
}