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+/*
+ * This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
+ *
+ * This program 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.
+ *
+ * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef TRINITY_SMARTENUM_H
+#define TRINITY_SMARTENUM_H
+
+#include "IteratorPair.h"
+#include <iterator>
+
+struct EnumText
+{
+ EnumText(char const* c, char const* t, char const* d) : Constant(c), Title(t), Description(d) {}
+ // Enum constant of the value
+ char const* const Constant;
+ // Human-readable title of the value
+ char const* const Title;
+ // Human-readable description of the value
+ char const* const Description;
+};
+
+namespace Trinity
+{
+ namespace Impl
+ {
+ template <typename Enum>
+ struct EnumUtils
+ {
+ static size_t Count();
+ static EnumText ToString(Enum value);
+ static Enum FromIndex(size_t index);
+ };
+ }
+}
+
+class EnumUtils
+{
+ public:
+ template <typename Enum>
+ static size_t Count() { return Trinity::Impl::EnumUtils<Enum>::Count(); }
+ template <typename Enum>
+ static EnumText ToString(Enum value) { return Trinity::Impl::EnumUtils<Enum>::ToString(value); }
+ template <typename Enum>
+ static Enum FromIndex(size_t index) { return Trinity::Impl::EnumUtils<Enum>::FromIndex(index); }
+
+ template <typename Enum>
+ class Iterator
+ {
+ public:
+ using iterator_category = std::random_access_iterator_tag;
+ using value_type = Enum;
+ using pointer = Enum*;
+ using reference = Enum&;
+ using difference_type = std::ptrdiff_t;
+
+ Iterator() : _index(EnumUtils::Count<Enum>()) {}
+ explicit Iterator(size_t index) : _index(index) { }
+
+ bool operator==(const Iterator& other) const { return other._index == _index; }
+ bool operator!=(const Iterator& other) const { return !operator==(other); }
+ difference_type operator-(Iterator const& other) const { return _index - other._index; }
+ bool operator<(const Iterator& other) const { return _index < other._index; }
+ bool operator<=(const Iterator& other) const { return _index <= other._index; }
+ bool operator>(const Iterator& other) const { return _index > other._index; }
+ bool operator>=(const Iterator& other) const { return _index >= other._index; }
+
+ value_type operator[](difference_type d) const { return FromIndex<Enum>(_index + d); }
+ value_type operator*() const { return operator[](0); }
+
+ Iterator& operator+=(difference_type d) { _index += d; return *this; }
+ Iterator& operator++() { return operator+=(1); }
+ Iterator operator++(int) { Iterator i = *this; operator++(); return i; }
+ Iterator operator+(difference_type d) const { Iterator i = *this; i += d; return i; }
+
+ Iterator& operator-=(difference_type d) { _index -= d; return *this; }
+ Iterator& operator--() { return operator-=(1); }
+ Iterator operator--(int) { Iterator i = *this; operator--(); return i; }
+ Iterator operator-(difference_type d) const { Iterator i = *this; i -= d; return i; }
+
+ private:
+ difference_type _index;
+ };
+
+ template <typename Enum>
+ static Iterator<Enum> Begin() { return Iterator<Enum>(0); }
+
+ template <typename Enum>
+ static Iterator<Enum> End() { return Iterator<Enum>(); }
+
+ template <typename Enum>
+ static Trinity::IteratorPair<Iterator<Enum>> Iterate() { return { Begin<Enum>(), End<Enum>() }; }
+
+ template <typename Enum>
+ static char const* ToConstant(Enum value) { return ToString(value).Constant; }
+
+ template <typename Enum>
+ static char const* ToTitle(Enum value) { return ToString(value).Title; }
+
+ template <typename Enum>
+ static char const* ToDescription(Enum value) { return ToString(value).Description; }
+};
+
+#endif