Change flip of assoc

Author: bronek89

src/AssocArray.php

@@ -226,11 +226,11 @@ public function toIterableValue(): IterableValue
     }
 
     /**
-     * @phpstan-return IterableValue<TValue, TKey>
+     * @phpstan-return AssocValue<int|string, TKey>
      */
-    public function flip(): IterableValue
+    public function flip(): AssocValue
     {
-        return $this->toIterableValue()->flip();
+        return new self(new Flip($this->items));
     }
 
     /**

src/AssocValue.php

@@ -145,9 +145,9 @@ public function only(...$keys): AssocValue;
     public function withoutElement($value): AssocValue;
 
     /**
-     * @phpstan-return IterableValue<TValue, TKey>
+     * @phpstan-return AssocValue<int|string, TKey>
      */
-    public function flip(): IterableValue;
+    public function flip(): AssocValue;
 
     /**
      * @param TKey $keyA

src/Associable/Flip.php

@@ -6,9 +6,9 @@
 use function array_flip;
 
 /**
- * @template TKey of int|string
+ * @template TKey
  * @template TValue of int|string
- * @implements Associable<TKey,TValue>
+ * @implements Associable<int|string,TValue>
  */
 final class Flip implements Associable
 {
@@ -23,7 +23,7 @@ public function __construct(Associable $associable)
         $this->associable = $associable;
     }
 
-    /** @return array<TKey,TValue> */
+    /** @return array<int|string,TValue> */
     public function toAssocArray(): array
     {
         return array_flip($this->associable->toAssocArray());