Removed pocketmine subdirectory, map PSR-4 style

src/utils/EnumTrait.php

@@ -0,0 +1,120 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+*/
+
+declare(strict_types=1);
+
+namespace pocketmine\utils;
+
+use function preg_match;
+
+trait EnumTrait{
+	use RegistryTrait;
+
+	/**
+	 * Registers the given object as an enum member.
+	 *
+	 * @param self $member
+	 *
+	 * @throws \InvalidArgumentException
+	 */
+	protected static function register(self $member) : void{
+		self::_registryRegister($member->name(), $member);
+	}
+
+	/**
+	 * Returns an array of enum members to be registered.
+	 *
+	 * (This ought to be private, but traits suck too much for that.)
+	 *
+	 * @return self[]|iterable
+	 */
+	abstract protected static function setup() : iterable;
+
+	/**
+	 * @internal Lazy-inits the enum if necessary.
+	 *
+	 * @throws \InvalidArgumentException
+	 */
+	protected static function checkInit() : void{
+		if(self::$members === null){
+			self::$members = [];
+			foreach(self::setup() as $item){
+				self::register($item);
+			}
+		}
+	}
+
+	/**
+	 * Returns all members of the enum.
+	 * This is overridden to change the return typehint.
+	 *
+	 * @return self[]
+	 */
+	public static function getAll() : array{
+		return self::_registryGetAll();
+	}
+
+	/**
+	 * Returns the enum member matching the given name.
+	 * This is overridden to change the return typehint.
+	 *
+	 * @param string $name
+	 *
+	 * @return self
+	 * @throws \InvalidArgumentException if no member matches.
+	 */
+	public static function fromString(string $name) : self{
+		return self::_registryFromString($name);
+	}
+
+	/** @var string */
+	private $enumName;
+
+	/**
+	 * @param string $enumName
+	 * @throws \InvalidArgumentException
+	 */
+	private function __construct(string $enumName){
+		static $pattern = '/^\D[A-Za-z\d_]+$/u';
+		if(preg_match($pattern, $enumName, $matches) === 0){
+			throw new \InvalidArgumentException("Invalid enum member name \"$enumName\", should only contain letters, numbers and underscores, and must not start with a number");
+		}
+		$this->enumName = $enumName;
+	}
+
+	/**
+	 * @return string
+	 */
+	public function name() : string{
+		return $this->enumName;
+	}
+
+	/**
+	 * Returns whether the two objects are equivalent.
+	 *
+	 * @param self $other
+	 *
+	 * @return bool
+	 */
+	public function equals(self $other) : bool{
+		return $this->enumName === $other->enumName;
+	}
+}