From 58a391906e8a48759f9622f074562ba8a428c0af Mon Sep 17 00:00:00 2001
From: Pol Dellaiera <pol.dellaiera@protonmail.com>
Date: Wed, 29 Dec 2021 21:49:57 +0100
Subject: [PATCH] fix: Remove local variable.

---
 src/Operation/Flatten.php | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/src/Operation/Flatten.php b/src/Operation/Flatten.php
index 8b0e5ce8e..0cbce22f9 100644
--- a/src/Operation/Flatten.php
+++ b/src/Operation/Flatten.php
@@ -45,14 +45,9 @@ static function (Iterator $iterator) use ($depth): Generator {
                             continue;
                         }
 
-                        if (1 !== $depth) {
-                            /** @var callable(Iterator<TKey, T>): Generator<mixed, mixed> $flatten */
-                            $flatten = Flatten::of()($depth - 1);
-
-                            $value = $flatten(new IterableIterator($value));
-                        }
-
-                        yield from $value;
+                        yield from (1 !== $depth)
+                            ? (new Flatten())()($depth - 1)(new IterableIterator($value))
+                            : $value;
                     }
                 };
     }