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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/>.
*/
#pragma once
#include <memory>
namespace dev
{
namespace solidity
{
/**
* This class represents the SSA representation of a program variable.
*/
class SSAVariable
{
public:
SSAVariable();
void resetIndex();
/// This function returns the current index of this SSA variable.
unsigned index() const { return m_currentIndex; }
unsigned& index() { return m_currentIndex; }
unsigned operator++()
{
return m_currentIndex = (*m_nextFreeIndex)++;
}
private:
unsigned m_currentIndex;
/// The next free index is a shared pointer because we want
/// the copy and the copied to share it.
std::shared_ptr<unsigned> m_nextFreeIndex;
};
}
}
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