From 4172418e5909961142b2bfa4cc842e6e48a028b6 Mon Sep 17 00:00:00 2001
From: neargye <neargye@gmail.com>
Date: Thu, 29 Aug 2019 18:48:54 +0500
Subject: [PATCH] fix type cast nameof_enum

---
 include/nameof.hpp | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/include/nameof.hpp b/include/nameof.hpp
index 327787d..e68d20e 100644
--- a/include/nameof.hpp
+++ b/include/nameof.hpp
@@ -281,11 +281,15 @@ template <typename E>
   static_assert(enum_range<D>::max < (std::numeric_limits<int>::max)(), "nameof::enum_range requires max must be less than INT_MAX.");
   static_assert(enum_range<D>::max > enum_range<D>::min, "nameof::enum_range requires max > min.");
   using U = std::underlying_type_t<D>;
-  constexpr auto max = enum_range<D>::max < (std::numeric_limits<U>::max)() ? enum_range<D>::max : (std::numeric_limits<U>::max)();
-  constexpr auto min = enum_range<D>::min > (std::numeric_limits<U>::min)() ? enum_range<D>::min : (std::numeric_limits<U>::min)();
+  constexpr int max = static_cast<int>(enum_range<D>::max < (std::numeric_limits<U>::max)() ? enum_range<D>::max : (std::numeric_limits<U>::max)());
+  constexpr int min = static_cast<int>(enum_range<D>::min > (std::numeric_limits<U>::min)() ? enum_range<D>::min : (std::numeric_limits<U>::min)());
   constexpr auto names = detail::enum_names<D, min>(std::make_integer_sequence<int, max - min + 1>{});
 
-  if (auto i = static_cast<std::size_t>(static_cast<int>(value) - min); i < names.size()) {
+  if (static_cast<U>(value) > static_cast<U>(max) || static_cast<U>(value) < static_cast<U>(min)) {
+    return {}; // Value out of range.
+  }
+
+  if (auto i = static_cast<std::size_t>(static_cast<U>(value) - min); i < names.size()) {
     return names[i];
   }