Make parser work with v2

src/parser/FileParser.php

@@ -6,11 +6,9 @@
 use phootwork\collection\Set;
 use phootwork\file\exception\FileNotFoundException;
 use phootwork\file\File;
-use PhpParser\Lexer\Emulative;
 use PhpParser\Node;
 use PhpParser\NodeTraverser;
 use PhpParser\NodeVisitorAbstract;
-use PhpParser\Parser;
 
 class FileParser extends NodeVisitorAbstract {
 
@@ -47,12 +45,21 @@ public function parse() {
 			throw new FileNotFoundException(sprintf('File (%s) does not exist.', $this->filename));
 		}
 
-		$parser = new Parser(new Emulative());
+		$parser = $this->getParser();
 		$traverser = new NodeTraverser();
 		$traverser->addVisitor($this);
 		$traverser->traverse($parser->parse($file->read()));
 	}
 
+	private function getParser() {
+		if (class_exists('\\PhpParser\\ParserFactory')) {
+			$factory = new \PhpParser\ParserFactory();
+			return $factory->create(\PhpParser\ParserFactory::PREFER_PHP7);
+		} else {
+			return new \PhpParser\Parser(new \PhpParser\Lexer\Emulative());
+		}
+	}
+
 	public function enterNode(Node $node) {
 		foreach ($this->visitors as $visitor) {
 			switch ($node->getType()) {