refactor enums

credits for class BitFlags go to Jelvan <3

tools/quake3/common/bitflags.h

@@ -0,0 +1,84 @@
+/*
+   Copyright (C) 2001-2006, William Joseph.
+   All Rights Reserved.
+
+   This file is part of GtkRadiant.
+
+   GtkRadiant is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   GtkRadiant 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with GtkRadiant; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#if !defined( INCLUDED_BITFLAGS_H )
+#define INCLUDED_BITFLAGS_H
+
+#include <type_traits>
+
+template <typename T, typename D>
+class BitFlags
+{
+public:
+	static_assert( std::is_integral<T>::value, "Integer wrapper" );
+
+	constexpr BitFlags( T flags = 0 ) noexcept
+		: flags_( flags )
+	{
+	}
+
+	constexpr explicit operator T() const
+	{
+		return flags_;
+	}
+
+	constexpr operator D() const
+	{
+		return D{ flags_ };
+	}
+
+	constexpr BitFlags& operator|=( BitFlags flags )
+	{
+		flags_ |= flags.flags_;
+		return *this;
+	}
+
+	constexpr BitFlags& operator&=( BitFlags flags )
+	{
+		flags_ &= flags.flags_;
+		return *this;
+	}
+
+	constexpr BitFlags operator~() const
+	{
+		return BitFlags( ~flags_ );
+	}
+
+	constexpr explicit operator bool() const
+	{
+		return flags_;
+	}
+
+	friend constexpr BitFlags operator|( BitFlags flags1, BitFlags flags2 )
+	{
+		return BitFlags( flags1.flags_ | flags2.flags_ );
+	}
+
+	friend constexpr BitFlags operator&( BitFlags flags1, BitFlags flags2 )
+	{
+		return BitFlags( flags1.flags_ & flags2.flags_ );
+	}
+
+private:
+	T flags_ = 0;
+};
+
+#endif