4 * This file is part of Psy Shell.
6 * (c) 2012-2017 Justin Hileman
8 * For the full copyright and license information, please view the LICENSE
9 * file that was distributed with this source code.
12 namespace Psy\CodeCleaner;
14 use PhpParser\Node\Name;
15 use PhpParser\Node\Stmt\Namespace_ as NamespaceStmt;
19 * Provide implicit namespaces for subsequent execution.
21 * The namespace pass remembers the last standalone namespace line encountered:
25 * ... which it then applies implicitly to all future evaluated code, until the
26 * namespace is replaced by another namespace. To reset to the top level
27 * namespace, enter `namespace {}`. This is a bit ugly, but it does the trick :)
29 class NamespacePass extends CodeCleanerPass
31 private $namespace = null;
35 * @param CodeCleaner $cleaner
37 public function __construct(CodeCleaner $cleaner)
39 $this->cleaner = $cleaner;
43 * If this is a standalone namespace line, remember it for later.
45 * Otherwise, apply remembered namespaces to the code until a new namespace
50 public function beforeTraverse(array $nodes)
52 $first = reset($nodes);
53 if (count($nodes) === 1 && $first instanceof NamespaceStmt && empty($first->stmts)) {
54 $this->setNamespace($first->name);
56 foreach ($nodes as $key => $node) {
57 if ($node instanceof NamespaceStmt) {
58 $this->setNamespace(null);
59 } elseif ($this->namespace !== null) {
60 $nodes[$key] = new NamespaceStmt($this->namespace, array($node));
69 * Remember the namespace and (re)set the namespace on the CodeCleaner as
72 * @param null|Name $namespace
74 private function setNamespace($namespace)
76 $this->namespace = $namespace;
77 $this->cleaner->setNamespace($namespace === null ? null : $namespace->parts);