Update Nemirtingas overlay to latest.

overlay_experimental/System/ClassEnumUtils.hpp

@@ -0,0 +1,116 @@
+/*
+ * Copyright (C) Nemirtingas
+ * This file is part of System.
+ *
+ * System is free software; you can redistribute it
+ * and/or modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * System is distributed in the hope that it will be
+ * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with System; if not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <type_traits>
+
+namespace System {
+    template<typename Enum>
+    struct EnableBitMaskOperators
+    {
+        static constexpr bool enable = false;
+    };
+
+    template<typename T>
+    constexpr typename std::underlying_type<T>::type GetEnumValue(T enum_value)
+    {
+        return static_cast<typename std::underlying_type<T>::type>(enum_value);
+    }
+}
+
+template<typename Enum>
+constexpr typename std::enable_if<System::EnableBitMaskOperators<Enum>::enable, Enum>::type
+operator |(Enum lhs, Enum rhs)
+{
+    using underlying = typename std::underlying_type<Enum>::type;
+    return static_cast<Enum> (
+        static_cast<underlying>(lhs) |
+        static_cast<underlying>(rhs)
+        );
+}
+
+template<typename Enum>
+constexpr typename std::enable_if<System::EnableBitMaskOperators<Enum>::enable, Enum>::type
+operator &(Enum lhs, Enum rhs)
+{
+    using underlying = typename std::underlying_type<Enum>::type;
+    return static_cast<Enum> (
+        static_cast<underlying>(lhs) &
+        static_cast<underlying>(rhs)
+        );
+}
+
+template<typename Enum>
+constexpr typename std::enable_if<System::EnableBitMaskOperators<Enum>::enable, Enum>::type
+operator ^(Enum lhs, Enum rhs)
+{
+    using underlying = typename std::underlying_type<Enum>::type;
+    return static_cast<Enum> (
+        static_cast<underlying>(lhs) ^
+        static_cast<underlying>(rhs)
+        );
+}
+
+template<typename Enum>
+constexpr typename std::enable_if<System::EnableBitMaskOperators<Enum>::enable, Enum>::type
+operator ~(Enum lhs)
+{
+    using underlying = typename std::underlying_type<Enum>::type;
+    return static_cast<Enum> (~static_cast<underlying>(lhs));
+}
+
+template<typename Enum>
+constexpr typename std::enable_if<System::EnableBitMaskOperators<Enum>::enable, Enum>::type&
+operator |=(Enum& lhs, Enum rhs)
+{
+    lhs = lhs | rhs;
+    return lhs;
+}
+
+template<typename Enum>
+constexpr typename std::enable_if<System::EnableBitMaskOperators<Enum>::enable, Enum>::type&
+operator &=(Enum& lhs, Enum rhs)
+{
+    lhs = lhs & rhs;
+    return lhs;
+}
+
+template<typename Enum>
+constexpr typename std::enable_if<System::EnableBitMaskOperators<Enum>::enable, Enum>::type&
+operator ^=(Enum& lhs, Enum rhs)
+{
+    lhs = lhs ^ rhs;
+    return lhs;
+}
+
+template<typename Enum>
+constexpr typename std::enable_if<System::EnableBitMaskOperators<Enum>::enable, bool>::type
+operator !(Enum lhs)
+{
+    using underlying = typename std::underlying_type<Enum>::type;
+    return !static_cast<underlying>(lhs);
+}
+
+#define UTILS_ENABLE_BITMASK_OPERATORS(T) \
+template<>                                \
+struct System::EnableBitMaskOperators<T>   \
+{                                         \
+    static constexpr bool enable = true;  \
+}