From ec5a59e82563db18f10c9f0b926a697da55c44e0 Mon Sep 17 00:00:00 2001
From: terik23 <neargye@gmail.com>
Date: Thu, 25 Apr 2019 21:57:00 +0500
Subject: [PATCH] add check max/min

---
 include/nameof.hpp | 1 +
 test/test.cpp      | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/include/nameof.hpp b/include/nameof.hpp
index 79e56cc..f330dea 100644
--- a/include/nameof.hpp
+++ b/include/nameof.hpp
@@ -59,6 +59,7 @@ struct enum_range final {
   static_assert(std::is_enum_v<E>, "nameof::enum_range requires enum type.");
   static constexpr int min = std::is_signed_v<std::underlying_type_t<E>> ? NAMEOF_ENUM_RANGE_MIN : 0;
   static constexpr int max = NAMEOF_ENUM_RANGE_MAX;
+  static_assert(max > min, "nameof::enum_range requires max > min.");
 };
 
 namespace detail {
diff --git a/test/test.cpp b/test/test.cpp
index ef97b7a..d659bfb 100644
--- a/test/test.cpp
+++ b/test/test.cpp
@@ -82,8 +82,10 @@ enum number : unsigned long { zero = 0, one = 100, two = 200, three = 300, four
 namespace nameof {
 template <>
 struct enum_range<number> {
+  static_assert(std::is_enum_v<number>, "nameof::enum_range<number> requires enum type.");
   static constexpr int min = 100;
   static constexpr int max = 300;
+  static_assert(max > min, "nameof::enum_range<number> requires max > min.");
 };
 }