chore: skip function likes without parameter types

Author: calebdw

rules-tests/DeadCode/Rector/FunctionLike/NarrowTooWideReturnTypeRector/Fixture/arrow_function.php.inc

@@ -2,24 +2,24 @@
 
 namespace Rector\Tests\DeadCode\Rector\FunctionLike\NarrowTooWideReturnTypeRector\Fixture;
 
-$simple = fn($x): string|int|bool => $x > 5 ? 'high' : 10;
+$simple = fn(int $x): string|int|bool => $x > 5 ? 'high' : 10;
 
-$ternary = fn($value): string|int|float|null =>
+$ternary = fn(?int $value): string|int|float|null =>
     $value === null ? null : ($value > 0 ? 'positive' : -1);
 
-$cast = fn($input): int|string|array => (int) $input;
+$cast = fn(mixed $input): int|string|array => (int) $input;
 
 ?>
 -----
 <?php
 
 namespace Rector\Tests\DeadCode\Rector\FunctionLike\NarrowTooWideReturnTypeRector\Fixture;
 
-$simple = fn($x): string|int => $x > 5 ? 'high' : 10;
+$simple = fn(int $x): string|int => $x > 5 ? 'high' : 10;
 
-$ternary = fn($value): string|int|null =>
+$ternary = fn(?int $value): string|int|null =>
     $value === null ? null : ($value > 0 ? 'positive' : -1);
 
-$cast = fn($input): int => (int) $input;
+$cast = fn(mixed $input): int => (int) $input;
 
 ?>

rules-tests/DeadCode/Rector/FunctionLike/NarrowTooWideReturnTypeRector/Fixture/phpdocs.php.inc

@@ -46,7 +46,7 @@ final class PhpDocs
     /**
      * @param int $a
      */
-    function quux($a): int|string
+    function quux(int $a): int|string
     {
         return $a;
     }
@@ -55,7 +55,7 @@ final class PhpDocs
      * @param int $a
      * @return int|string
      */
-    function mixedReturn($a): int|string
+    function mixedReturn(int $a): int|string
     {
         return $a;
     }
@@ -111,7 +111,7 @@ final class PhpDocs
     /**
      * @param int $a
      */
-    function quux($a): int
+    function quux(int $a): int
     {
         return $a;
     }
@@ -120,7 +120,7 @@ final class PhpDocs
      * @param int $a
      * @return int
      */
-    function mixedReturn($a): int
+    function mixedReturn(int $a): int
     {
         return $a;
     }

rules-tests/DeadCode/Rector/FunctionLike/NarrowTooWideReturnTypeRector/Fixture/skip_function_likes_without_parameter_types.php.inc

@@ -0,0 +1,17 @@
+<?php
+
+namespace Rector\Tests\DeadCode\Rector\FunctionLike\NarrowTooWideReturnTypeRector\Fixture;
+
+final class skip_function_likes_without_parameter_types
+{
+    /**
+     * @param class-string<SomeInterface> $class
+     * @return class-string<SomeInterface>|int
+     */
+    public function bar($class): string|int
+    {
+        return $class;
+    }
+}
+
+?>

rules/DeadCode/Rector/FunctionLike/NarrowTooWideReturnTypeRector.php

@@ -164,6 +164,12 @@ private function shouldSkipNode(ClassMethod|Function_|Closure|ArrowFunction $nod
             return true;
         }
 
+        foreach ($node->params as $param) {
+            if (! $param->type instanceof Node) {
+                return true;
+            }
+        }
+
         if (! $node instanceof ClassMethod) {
             return false;
         }