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Diffstat (limited to 'src/common/Utilities/SmartEnum.h')
-rw-r--r-- | src/common/Utilities/SmartEnum.h | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/src/common/Utilities/SmartEnum.h b/src/common/Utilities/SmartEnum.h new file mode 100644 index 00000000000..0966469f454 --- /dev/null +++ b/src/common/Utilities/SmartEnum.h @@ -0,0 +1,116 @@ +/* + * 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 |