prefer scalar type hints over phpdoc annotation

use method exists lookup to be safe and not break on old hhvm versions

add test that checks if type hint is preferred over annotation

lib/private/appframework/utility/controllermethodreflector.php

@@ -60,16 +60,18 @@ class ControllerMethodReflector implements IControllerMethodReflector{
 
 		// extract type parameter information
 		preg_match_all('/@param\h+(?P<type>\w+)\h+\$(?P<var>\w+)/', $docs, $matches);
-		// this is just a fix for PHP 5.3 (array_combine raises warning if called with
-		// two empty arrays
-		if($matches['var'] === array() && $matches['type'] === array()) {
-			$this->types = array();
-		} else {
-			$this->types = array_combine($matches['var'], $matches['type']);
-		}
+		$this->types = array_combine($matches['var'], $matches['type']);
 
-		// get method parameters
 		foreach ($reflection->getParameters() as $param) {
+			// extract type information from PHP 7 scalar types and prefer them
+			// over phpdoc annotations
+			if (method_exists($param, 'getType')) {
+				$type = $param->getType();
+				if ($type !== null) {
+					$this->types[$param->getName()] = (string) $type;
+				}
+			}
+
 			if($param->isOptional()) {
 				$default = $param->getDefaultValue();
 			} else {
@@ -82,9 +84,9 @@ class ControllerMethodReflector implements IControllerMethodReflector{
 
 	/**
 	 * Inspects the PHPDoc parameters for types
-	 * @param string $parameter the parameter whose type comments should be 
+	 * @param string $parameter the parameter whose type comments should be
 	 * parsed
-	 * @return string|null type in the type parameters (@param int $something) 
+	 * @return string|null type in the type parameters (@param int $something)
 	 * would return int or null if not existing
 	 */
 	public function getType($parameter) {

tests/lib/appframework/utility/ControllerMethodReflectorTest.php

@@ -104,6 +104,25 @@ class ControllerMethodReflectorTest extends \Test\TestCase {
 		$this->assertEquals('int', $reader->getType('test'));
 	}
 
+	/**
+	 * @Annotation
+	 * @param int $a
+	 * @param int $b
+	 * @requires PHP 7
+	 */
+	public function testReadTypeIntAnnotationsScalarTypes($a, float $b, int $c, $d){
+		$reader = new ControllerMethodReflector();
+		$reader->reflect(
+			'\OC\AppFramework\Utility\ControllerMethodReflectorTest',
+			'testReadTypeIntAnnotationsScalarTypes'
+		);
+
+		$this->assertEquals('int', $reader->getType('a'));
+		$this->assertEquals('float', $reader->getType('b'));
+		$this->assertEquals('int', $reader->getType('c'));
+		$this->assertNull($reader->getType('d'));
+	}
+
 
 	/**
 	 * @Annotation