Check for the existance of the 'mixed' key to detect untyped parameters

vimeo · Apr 20, 2023 · 1bbe8c6 · 1bbe8c6
1 parent 0a40286
commit 1bbe8c6
Showing 1 changed file with 6 additions and 2 deletions.
diff --git a/src/Psalm/Type/UnionTrait.php b/src/Psalm/Type/UnionTrait.php
@@ -52,6 +52,8 @@
 use function sort;
 use function strpos;
 
+use const ARRAY_FILTER_USE_BOTH;
+
 /**
  * @psalm-immutable
  * @psalm-import-type TProperties from Union
@@ -800,11 +802,13 @@ public function isMixed(bool $check_templates = false): bool
         return count(
             array_filter(
                 $this->types,
-                static fn($type): bool => $type instanceof TMixed
+                static fn($type, $key): bool => $key == 'mixed'
+                    || $type instanceof TMixed
                     || ($check_templates
                         && $type instanceof TTemplateParam
                         && $type->as->isMixed()
-                    )
+                    ),
+                ARRAY_FILTER_USE_BOTH,
             ),
         ) === count($this->types);
     }