Fix #44 - support empty namespaces

src/Psalm/Checker/FileChecker.php

@@ -213,8 +213,7 @@ class FileChecker extends SourceChecker implements StatementsSource
             if ($stmt instanceof PhpParser\Node\Stmt\Class_
                 || $stmt instanceof PhpParser\Node\Stmt\Interface_
                 || $stmt instanceof PhpParser\Node\Stmt\Trait_
-                || ($stmt instanceof PhpParser\Node\Stmt\Namespace_ &&
-                    $stmt->name instanceof PhpParser\Node\Name)
+                || $stmt instanceof PhpParser\Node\Stmt\Namespace_
             ) {
                 if ($stmt instanceof PhpParser\Node\Stmt\Class_ && $stmt->name) {
                     $class_checker = new ClassChecker($stmt, $this, $stmt->name);
@@ -232,10 +231,8 @@ class FileChecker extends SourceChecker implements StatementsSource
                     $interfaces_to_check[] = $class_checker;
                 } elseif ($stmt instanceof PhpParser\Node\Stmt\Trait_ && $stmt->name) {
                     $trait_checker = new TraitChecker($stmt, $this, $stmt->name);
-                } elseif ($stmt instanceof PhpParser\Node\Stmt\Namespace_ &&
-                    $stmt->name instanceof PhpParser\Node\Name
-                ) {
-                    $namespace_name = implode('\\', $stmt->name->parts);
+                } elseif ($stmt instanceof PhpParser\Node\Stmt\Namespace_) {
+                    $namespace_name = $stmt->name ? implode('\\', $stmt->name->parts) : '';
 
                     $namespace_checker = new NamespaceChecker($stmt, $this);
 

tests/NamespaceTest.php

@@ -0,0 +1,55 @@
+<?php
+namespace Psalm\Tests;
+
+use PhpParser\ParserFactory;
+use PHPUnit_Framework_TestCase;
+use Psalm\Checker\FileChecker;
+use Psalm\Config;
+use Psalm\Context;
+
+class NamespaceTest extends PHPUnit_Framework_TestCase
+{
+    /** @var \PhpParser\Parser */
+    protected static $parser;
+
+    /** @var \Psalm\Checker\ProjectChecker */
+    protected $project_checker;
+
+    public static function setUpBeforeClass()
+    {
+        self::$parser = (new ParserFactory)->create(ParserFactory::PREFER_PHP7);
+
+        $config = new TestConfig();
+    }
+
+    public function setUp()
+    {
+        FileChecker::clearCache();
+        $this->project_checker = new \Psalm\Checker\ProjectChecker();
+    }
+
+    public function testEmptyNamespace()
+    {
+        $stmts = self::$parser->parse('<?php
+        namespace A {
+            function foo() : void {
+
+            }
+
+            class Bar {
+
+            }
+        }
+        namespace {
+            A\foo();
+            \A\foo();
+
+            (new A\Bar);
+        }
+        ');
+
+        $file_checker = new FileChecker('somefile.php', $this->project_checker, $stmts);
+        $context = new Context('somefile.php');
+        $file_checker->visitAndAnalyzeMethods($context);
+    }
+}