60 lines
1.5 KiB
C++
60 lines
1.5 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop version of Telegram messaging app, see https://telegram.org
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Telegram Desktop is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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It is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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In addition, as a special exception, the copyright holders give permission
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to link the code of portions of this program with the OpenSSL library.
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Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
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Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
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*/
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#pragma once
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namespace base {
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template <typename Enum>
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class enum_mask {
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using Type = std::uint32_t;
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public:
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static_assert(static_cast<int>(Enum::kCount) <= 32, "We have only 32 bit.");
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enum_mask() = default;
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enum_mask(Enum value) : _value(ToBit(value)) {
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}
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enum_mask added(enum_mask other) const {
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auto result = *this;
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result.set(other);
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return result;
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}
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void set(enum_mask other) {
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_value |= other._value;
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}
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bool test(Enum value) const {
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return _value & ToBit(value);
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}
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explicit operator bool() const {
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return _value != 0;
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}
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private:
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inline static Type ToBit(Enum value) {
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return 1 << static_cast<Type>(value);
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}
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Type _value = 0;
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};
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} // namespace base
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