Allow bare pure-callable in namespace cc @azjezz

src/Psalm/Internal/Type/TypeTokenizer.php

@@ -41,6 +41,7 @@ class TypeTokenizer
         'class-string' => true,
         'callable-string' => true,
         'callable-array' => true,
+        'pure-callable' => true,
         'trait-string' => true,
         'mysql-escaped-string' => true,
         'html-escaped-string' => true,

tests/PureCallableTest.php

@@ -191,6 +191,17 @@ class PureCallableTest extends TestCase
                      */
                     function f(callable $p): void {}',
             ],
+            'varCallableInNamespace' => [
+                '<?php
+                    namespace Foo;
+
+                    /**
+                     * @param pure-callable $c
+                     */
+                    function bar(callable $c) : callable {
+                        return $c;
+                    }',
+            ],
         ];
     }