From d9ba68f01c70001c05e8b5eb6a8e4d1c13ee8b77 Mon Sep 17 00:00:00 2001
From: terik23 <neargye@gmail.com>
Date: Sun, 31 Mar 2019 20:29:02 +0500
Subject: [PATCH] add check to enum_to_string

---
 include/magic_enum.hpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/magic_enum.hpp b/include/magic_enum.hpp
index 979dccd..8604248 100644
--- a/include/magic_enum.hpp
+++ b/include/magic_enum.hpp
@@ -170,6 +170,9 @@ template <typename T, typename = std::enable_if_t<std::is_enum_v<std::decay_t<T>
 [[nodiscard]] constexpr std::optional<std::string_view> enum_to_string(T value) noexcept {
   constexpr bool s = std::is_signed_v<std::underlying_type_t<std::decay_t<T>>>;
   constexpr int min = s ? -MAGIC_ENUM_MAX_SEARCH_DEPTH : 0;
+  if (static_cast<int>(value) >= MAGIC_ENUM_MAX_SEARCH_DEPTH || static_cast<int>(value) <= -MAGIC_ENUM_MAX_SEARCH_DEPTH) {
+    return std::nullopt; // Enum variable out of range MAGIC_ENUM_MAX_SEARCH_DEPTH.
+  }
   return detail::enum_to_string_impl_t<std::decay_t<T>, min>{}(static_cast<int>(value));
 }