comparison vendor/psy/psysh/src/CodeCleaner/NamespacePass.php @ 0:c75dbcec494b

Initial commit from drush-created site

+<?php
+
+/*
+ * This file is part of Psy Shell.
+ *
+ * (c) 2012-2018 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Psy\CodeCleaner;
+
+use PhpParser\Node\Name;
+use PhpParser\Node\Stmt\Namespace_;
+use Psy\CodeCleaner;
+
+/**
+ * Provide implicit namespaces for subsequent execution.
+ *
+ * The namespace pass remembers the last standalone namespace line encountered:
+ *
+ *     namespace Foo\Bar;
+ *
+ * ... which it then applies implicitly to all future evaluated code, until the
+ * namespace is replaced by another namespace. To reset to the top level
+ * namespace, enter `namespace {}`. This is a bit ugly, but it does the trick :)
+ */
+class NamespacePass extends CodeCleanerPass
+{
+    private $namespace = null;
+    private $cleaner;
+
+    /**
+     * @param CodeCleaner $cleaner
+     */
+    public function __construct(CodeCleaner $cleaner)
+    {
+        $this->cleaner = $cleaner;
+    }
+
+    /**
+     * If this is a standalone namespace line, remember it for later.
+     *
+     * Otherwise, apply remembered namespaces to the code until a new namespace
+     * is encountered.
+     *
+     * @param array $nodes
+     */
+    public function beforeTraverse(array $nodes)
+    {
+        if (empty($nodes)) {
+            return $nodes;
+        }
+
+        $last = end($nodes);
+
+        if ($last instanceof Namespace_) {
+            $kind = $last->getAttribute('kind');
+
+            // Treat all namespace statements pre-PHP-Parser v3.1.2 as "open",
+            // even though we really have no way of knowing.
+            if ($kind === null || $kind === Namespace_::KIND_SEMICOLON) {
+                // Save the current namespace for open namespaces
+                $this->setNamespace($last->name);
+            } else {
+                // Clear the current namespace after a braced namespace
+                $this->setNamespace(null);
+            }
+
+            return $nodes;
+        }
+
+        return $this->namespace ? [new Namespace_($this->namespace, $nodes)] : $nodes;
+    }
+
+    /**
+     * Remember the namespace and (re)set the namespace on the CodeCleaner as
+     * well.
+     *
+     * @param null|Name $namespace
+     */
+    private function setNamespace($namespace)
+    {
+        $this->namespace = $namespace;
+        $this->cleaner->setNamespace($namespace === null ? null : $namespace->parts);
+    }
+}