From 92dfab4ac45c003131d202d2b2da133e0f732733 Mon Sep 17 00:00:00 2001
From: neargye <neargye@gmail.com>
Date: Mon, 30 Sep 2019 19:08:29 +0500
Subject: [PATCH] improve enum_value for dense enums

---
 include/magic_enum.hpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/include/magic_enum.hpp b/include/magic_enum.hpp
index 7a89a84..cffc658 100644
--- a/include/magic_enum.hpp
+++ b/include/magic_enum.hpp
@@ -33,6 +33,7 @@
 #define NEARGYE_MAGIC_ENUM_HPP
 
 #include <array>
+#include <cassert>
 #include <cstddef>
 #include <iosfwd>
 #include <limits>
@@ -397,7 +398,11 @@ struct enum_traits<E, std::enable_if_t<detail::is_enum_v<E>>> {
   }
 
   [[nodiscard]] static constexpr E value(std::size_t index) noexcept {
-    return values[index];
+    if constexpr (detail::size_v<E> != detail::count_v<E>) {
+      return assert(index < count), values[index];
+    } else {
+      return assert(index < count), static_cast<E>(detail::min_v<E> + index);
+    }
   }
 
   [[nodiscard]] static constexpr std::string_view name(E value) noexcept {