strict typing and php 7.1

src/XML/BasicSearch.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
  *
@@ -70,7 +70,7 @@ class BasicSearch implements XmlDeserializable {
 	 * @return BasicSearch
 	 * @throws ParseException
 	 */
-	static function xmlDeserialize(Reader $reader) {
+	static function xmlDeserialize(Reader $reader): BasicSearch {
 		$search = new self();
 
 		$elements = \Sabre\Xml\Deserializer\keyValue($reader);

src/XML/BasicSearchSchema.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
  *

src/XML/Limit.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
  *
@@ -29,7 +29,7 @@ use SearchDAV\DAV\SearchPlugin;
  * The limit and offset of a search query
  */
 class Limit extends \SearchDAV\Query\Limit implements XmlDeserializable {
-	static function xmlDeserialize(Reader $reader) {
+	static function xmlDeserialize(Reader $reader): Limit {
 		$limit = new self();
 
 		$elements = \Sabre\Xml\Deserializer\keyValue($reader);

src/XML/Literal.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
  *
@@ -26,7 +26,7 @@ use Sabre\Xml\Reader;
 use Sabre\Xml\XmlDeserializable;
 
 class Literal extends \SearchDAV\Query\Literal implements XmlDeserializable {
-	static function xmlDeserialize(Reader $reader) {
+	static function xmlDeserialize(Reader $reader): Literal {
 		$literal = new self();
 
 		$literal->value = $reader->readText();

src/XML/Operator.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
  *
@@ -50,12 +50,12 @@ class Operator implements XmlDeserializable {
 	 * @param string $type
 	 * @param array $arguments
 	 */
-	public function __construct($type = '', array $arguments = []) {
+	public function __construct(string $type = '', array $arguments = []) {
 		$this->type = $type;
 		$this->arguments = $arguments;
 	}
 
-	static function xmlDeserialize(Reader $reader) {
+	static function xmlDeserialize(Reader $reader): Operator {
 		$operator = new self();
 
 		$operator->type = $reader->getClark();

src/XML/Order.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
  *
@@ -45,12 +45,12 @@ class Order implements XmlDeserializable {
 	 * @param string $property
 	 * @param string $order
 	 */
-	public function __construct($property = '', $order = \SearchDAV\Query\Order::ASC) {
+	public function __construct(string $property = '', string $order = \SearchDAV\Query\Order::ASC) {
 		$this->property = $property;
 		$this->order = $order;
 	}
 
-	static function xmlDeserialize(Reader $reader) {
+	static function xmlDeserialize(Reader $reader): Order {
 		$order = new self();
 
 		$childs = \Sabre\Xml\Deserializer\keyValue($reader);

src/XML/PropDesc.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
  *

src/XML/QueryDiscoverResponse.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
  *

src/XML/Scope.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
  *
@@ -25,7 +25,7 @@ use Sabre\Xml\Reader;
 use Sabre\Xml\XmlDeserializable;
 
 class Scope extends \SearchDAV\Query\Scope implements XmlDeserializable {
-	static function xmlDeserialize(Reader $reader) {
+	static function xmlDeserialize(Reader $reader): Scope {
 		$scope = new self();
 
 		$values = \Sabre\Xml\Deserializer\keyValue($reader);

src/XML/SupportedQueryGrammar.php

@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
  *