Add support for anonymous classes

src/Psalm/Checker/ClassChecker.php

@@ -31,13 +31,19 @@ class ClassChecker extends ClassLikeChecker
      */
     protected static $class_extends = [];
 
+    protected static $anonymous_class_count = 0;
+
     /**
      * @param PhpParser\Node\Stmt\Class_ $class
      * @param StatementsSource           $source
-     * @param string                     $absolute_class
+     * @param string|null                $absolute_class
      */
     public function __construct(PhpParser\Node\Stmt\Class_ $class, StatementsSource $source, $absolute_class)
     {
+        if ($absolute_class === null) {
+            $absolute_class = 'PsalmAnonymousClass' . (self::$anonymous_class_count++);
+        }
+
         parent::__construct($class, $source, $absolute_class);
 
         self::$existing_classes[$absolute_class] = true;
@@ -193,6 +199,8 @@ class ClassChecker extends ClassLikeChecker
 
         self::$class_extends = [];
 
+        self::$anonymous_class_count = 0;
+
         MethodChecker::clearCache();
     }
 }

src/Psalm/Checker/ClassLikeChecker.php

@@ -487,6 +487,10 @@ abstract class ClassLikeChecker implements StatementsSource
                 }
             }
         }
+
+        if (!$this->class->name) {
+            $this->class->name = $this->absolute_class;
+        }
     }
 
     /**

src/Psalm/Checker/StatementsChecker.php

@@ -2059,6 +2059,13 @@ class StatementsChecker
                 }
             }
         }
+        elseif ($stmt->class instanceof PhpParser\Node\Stmt\Class_) {
+            $this->check([$stmt->class], $context);
+            $absolute_class = $stmt->class->name;
+        }
+        else {
+            $this->checkExpression($stmt->class, $context);
+        }
 
         if ($absolute_class) {
             $stmt->inferredType = new Type\Union([new Type\Atomic($absolute_class)]);

tests/Php70Test.php

@@ -119,7 +119,6 @@ class Php70Test extends PHPUnit_Framework_TestCase
 
     public function testAnonymousClass()
     {
-        $this->markTestIncomplete('Not yet supported');
         $stmts = self::$_parser->parse('<?php
         interface Logger {
             public function log(string $msg);