solidity/libsolidity/formal/SSAVariable.h

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/*
This file is part of solidity.
solidity 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 3 of the License, or
(at your option) any later version.
solidity 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 solidity. If not, see <http://www.gnu.org/licenses/>.
*/
// SPDX-License-Identifier: GPL-3.0
#pragma once
#include <memory>
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namespace solidity::frontend::smt
{
/**
* This class represents the SSA representation of a program variable.
*/
class SSAVariable
{
public:
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SSAVariable();
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/// Resets index to 0 and next index to 1.
void resetIndex();
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/// Sets index to _index and only adjusts next if next <= _index.
void setIndex(unsigned _index);
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/// This function returns the current index of this SSA variable.
unsigned index() const { return m_currentIndex; }
unsigned& index() { return m_currentIndex; }
unsigned operator++()
{
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return m_currentIndex = m_nextFreeIndex++;
}
private:
unsigned m_currentIndex;
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unsigned m_nextFreeIndex;
};
}