[TypeDeclaration] Skip already typed param on AddClosureParamTypeForA…

…rrayReduceRector (#6737)

rules-tests/TypeDeclaration/Rector/FunctionLike/AddClosureParamTypeForArrayReduceRector/Fixture/skip_already_typed_param.php.inc

@@ -0,0 +1,16 @@
+<?php
+
+namespace Rector\Tests\TypeDeclaration\Rector\FunctionLike\AddClosureParamTypeForArrayReduceRector\Fixture;
+
+class SkipAlreadyTypedParam
+{
+    /**
+     * @param list<string> $array
+     */
+    public function run(array $array)
+    {
+        return array_reduce($array, function (string $carry, ?string $value) {
+            return $carry . $value;
+        }, '');
+    }
+}

rules/TypeDeclaration/Rector/FunctionLike/AddClosureParamTypeForArrayReduceRector.php

@@ -140,10 +140,7 @@ private function refactorParameter(Param $param, Type $type): bool
 
         // already set → no change
         if ($param->type instanceof Node) {
-            $currentParamType = $this->staticTypeMapper->mapPhpParserNodePHPStanType($param->type);
-            if ($this->typeComparator->areTypesEqual($currentParamType, $type)) {
-                return false;
-            }
+            return false;
         }
 
         $paramTypeNode = $this->staticTypeMapper->mapPHPStanTypeToPhpParserNode($type, TypeKind::PARAM);