Plural_Forms

9	#[AllowDynamicProperties]10	class Plural_Forms {11		/**12		 * Operator characters.13		 *14		 * @since 4.9.015		 * @var string OP_CHARS Operator characters.16		 */17		const OP_CHARS = '|&><!=%?:';18 19		/**20		 * Valid number characters.21		 *22		 * @since 4.9.023		 * @var string NUM_CHARS Valid number characters.24		 */25		const NUM_CHARS = '0123456789';26 27		/**28		 * Operator precedence.29		 *30		 * Operator precedence from highest to lowest. Higher numbers indicate31		 * higher precedence, and are executed first.32		 *33		 * @see https://en.wikipedia.org/wiki/Operators_in_C_and_C%2B%2B#Operator_precedence34		 *35		 * @since 4.9.036		 * @var array $op_precedence Operator precedence from highest to lowest.37		 */38		protected static $op_precedence = array(39			'%'  => 6,40 41			'<'  => 5,42			'<=' => 5,43			'>'  => 5,44			'>=' => 5,45 46			'==' => 4,47			'!=' => 4,48 49			'&&' => 3,50 51			'||' => 2,52 53			'?:' => 1,54			'?'  => 1,55 56			'('  => 0,57			')'  => 0,58		);59 60		/**61		 * Tokens generated from the string.62		 *63		 * @since 4.9.064		 * @var array $tokens List of tokens.65		 */66		protected $tokens = array();67 68		/**69		 * Cache for repeated calls to the function.70		 *71		 * @since 4.9.072		 * @var array $cache Map of $n => $result73		 */74		protected $cache = array();75 76		/**77		 * Constructor.78		 *79		 * @since 4.9.080		 *81		 * @param string $str Plural function (just the bit after `plural=` from Plural-Forms)82		 */83		public function __construct( $str ) {84			$this->parse( $str );85		}86 87		/**88		 * Parse a Plural-Forms string into tokens.