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53 lines
1.1 KiB
53 lines
1.1 KiB
10 years ago
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/*
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This file is part of cpp-ethereum.
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cpp-ethereum 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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cpp-ethereum 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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You should have received a copy of the GNU General Public License
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along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file Diff.h
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* @author Gav Wood <i@gavwood.com>
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* @date 2014
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*/
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#pragma once
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namespace dev
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{
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enum class ExistDiff
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{
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Same,
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New,
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Dead
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};
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template <class T>
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class Diff
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{
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public:
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Diff() {}
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Diff(T _from, T _to): m_from(_from), m_to(_to) {}
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T const& from() const { return m_from; }
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T const& to() const { return m_to; }
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explicit operator bool() const { return m_from != m_to; }
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private:
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T m_from;
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T m_to;
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};
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}
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