From 123c66fb78fabfa933cb3fd948929936a12babb7 Mon Sep 17 00:00:00 2001
From: masbug <masbug@users.noreply.github.com>
Date: Wed, 4 Sep 2024 14:30:47 +0200
Subject: [PATCH] enum_flags_name: return name for 0, if it exists

---
 include/magic_enum/magic_enum_flags.hpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/magic_enum/magic_enum_flags.hpp b/include/magic_enum/magic_enum_flags.hpp
index 18d03ec..2ea5ef0 100644
--- a/include/magic_enum/magic_enum_flags.hpp
+++ b/include/magic_enum/magic_enum_flags.hpp
@@ -70,6 +70,14 @@ template <typename E>
   constexpr auto S = detail::enum_subtype::flags;
   static_assert(detail::is_reflected_v<D, S>, "magic_enum requires enum implementation and valid max and min.");
 
+  // There might be a name for value 0 (when no flags are set).
+  if constexpr(enum_contains<E>(0)) {
+    if(static_cast<U>(value) == 0) {
+      constexpr string_view zeroName = detail::enum_name_v<D, static_cast<D>(0)>;
+      return string(zeroName);
+    }
+  }
+
   string name;
   auto check_value = U{0};
   for (std::size_t i = 0; i < detail::count_v<D, S>; ++i) {