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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 <libsolidity/formal/SolverInterface.h>
#include <libsolidity/ast/AST.h>
#include <memory>
namespace dev
{
namespace solidity
{
class Declaration;
/**
* This class represents the symbolic version of a program variable.
*/
class SymbolicVariable
{
public:
explicit SymbolicVariable(Declaration const* _decl,
smt::SolverInterface& _interface);
SymbolicVariable(SymbolicVariable const&) = default;
SymbolicVariable(SymbolicVariable&&) = default;
SymbolicVariable& operator=(SymbolicVariable const&) = default;
SymbolicVariable& operator=(SymbolicVariable&&) = default;
smt::Expression operator()(int _seq) const
{
return valueAtSequence(_seq);
}
std::string uniqueSymbol() const;
virtual void setZeroValue(int _seq) = 0;
virtual void setUnknownValue(int _seq) = 0;
protected:
smt::Expression valueAtSequence(int _seq) const
{
return (*m_expression)(_seq);
}
Declaration const* m_declaration;
std::shared_ptr<smt::Expression> m_expression = nullptr;
smt::SolverInterface& m_interface;
};
}
}
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