From f54b3ecaa20ea6db2a0c8444fc62dd82ec098e24 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Felix=20G=C3=BCndling?= <felix.guendling@gmail.com>
Date: Thu, 10 Oct 2024 14:22:20 +0200
Subject: [PATCH] bugfix for std::optional hashing

---
 include/cista/hashing.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/cista/hashing.h b/include/cista/hashing.h
index 58c14fa..3b60f30 100644
--- a/include/cista/hashing.h
+++ b/include/cista/hashing.h
@@ -123,7 +123,7 @@ struct hashing {
     } else if constexpr (is_strong_v<Type>) {
       return hashing<typename Type::value_t>{}(el.v_, seed);
     } else if constexpr (detail::is_optional<Type>::value) {
-      return el.has_value() ? 0U : hashing<typename Type::value_type>{}(*el);
+      return el.has_value() ? hashing<typename Type::value_type>{}(*el) : 0U;
     } else {
       static_assert(has_hash_v<Type> || std::is_scalar_v<Type> ||
                         has_std_hash_v<Type> || is_iterable_v<Type> ||