From 67c2efb85ca4e227618e306e9d8bc804ff74bc86 Mon Sep 17 00:00:00 2001
From: John Wellbelove <jwellbelove@users.noreply.github.com>
Date: Thu, 14 Jul 2022 17:31:20 +0100
Subject: [PATCH] Added is_enum

---
 .../etl/generators/type_traits_generator.h    | 22 ++++++++++++++++---
 include/etl/type_traits.h                     | 22 ++++++++++++++++---
 test/test_type_traits.cpp                     |  7 ++++--
 3 files changed, 43 insertions(+), 8 deletions(-)

diff --git a/include/etl/generators/type_traits_generator.h b/include/etl/generators/type_traits_generator.h
index 82acf12c..8d74b511 100644
--- a/include/etl/generators/type_traits_generator.h
+++ b/include/etl/generators/type_traits_generator.h
@@ -704,7 +704,7 @@ namespace etl
 #endif
 
   //***************************************************************************
-  /// decval
+  /// declval
 #if ETL_USING_CPP11
   template <typename T>
   typename etl::add_rvalue_reference<T>::type declval() ETL_NOEXCEPT;
@@ -742,7 +742,7 @@ namespace etl
   inline constexpr bool is_enum_v = etl::is_enum<T>::value;
 #endif
 
-#endif // ETL_USING_CPP11
+#endif
 
   //***************************************************************************
   /// is_convertible
@@ -1256,10 +1256,26 @@ namespace etl
 #endif
 
   //***************************************************************************
-  /// decval
+  /// declval
 #if ETL_USING_CPP11
   template <typename T>
   typename std::add_rvalue_reference<T>::type declval() ETL_NOEXCEPT;
+#endif
+
+#if ETL_USING_CPP11
+  //***************************************************************************
+  /// is_enum
+  ///\ingroup type_traits
+  template <typename T>
+  struct is_enum : std::is_enum<T>
+  {
+  };
+
+#if ETL_USING_CPP17
+  template <typename T>
+  inline constexpr bool is_enum_v = etl::is_enum<T>::value;
+#endif
+
 #endif
 
   //***************************************************************************
diff --git a/include/etl/type_traits.h b/include/etl/type_traits.h
index c503e7d8..adb67f9b 100644
--- a/include/etl/type_traits.h
+++ b/include/etl/type_traits.h
@@ -692,7 +692,7 @@ namespace etl
 #endif
 
   //***************************************************************************
-  /// decval
+  /// declval
 #if ETL_USING_CPP11
   template <typename T>
   typename etl::add_rvalue_reference<T>::type declval() ETL_NOEXCEPT;
@@ -730,7 +730,7 @@ namespace etl
   inline constexpr bool is_enum_v = etl::is_enum<T>::value;
 #endif
 
-#endif // ETL_USING_CPP11
+#endif
 
   //***************************************************************************
   /// is_convertible
@@ -1244,10 +1244,26 @@ namespace etl
 #endif
 
   //***************************************************************************
-  /// decval
+  /// declval
 #if ETL_USING_CPP11
   template <typename T>
   typename std::add_rvalue_reference<T>::type declval() ETL_NOEXCEPT;
+#endif
+
+#if ETL_USING_CPP11
+  //***************************************************************************
+  /// is_enum
+  ///\ingroup type_traits
+  template <typename T>
+  struct is_enum : std::is_enum<T>
+  {
+  };
+
+#if ETL_USING_CPP17
+  template <typename T>
+  inline constexpr bool is_enum_v = etl::is_enum<T>::value;
+#endif
+
 #endif
 
   //***************************************************************************
diff --git a/test/test_type_traits.cpp b/test/test_type_traits.cpp
index 61d01e08..83848757 100644
--- a/test/test_type_traits.cpp
+++ b/test/test_type_traits.cpp
@@ -67,14 +67,16 @@ namespace
   };
 
   // Class which can be implicitly converted to/from any default-constructable type
-  struct ToAny {
+  struct ToAny 
+  {
     ToAny() = default;
     template <typename T> ToAny(T){};
     template <typename T> operator T() { return T(); }
   };
 
   // Can't be default constructed
-  struct NotDefaultConstructable {
+  struct NotDefaultConstructable 
+  {
     NotDefaultConstructable() = delete;
   };
 
@@ -985,6 +987,7 @@ namespace
 
   //*************************************************************************
   #define CHECK_EQUAL_FOR_TYPE(type) CHECK_EQUAL(std::is_enum_v<type>, etl::is_enum_v<type>)
+
   TEST(test_is_enum) {
     CHECK_EQUAL_FOR_TYPE(void);
     CHECK_EQUAL_FOR_TYPE(void*);