solidity/libsolidity/formal/SymbolicVariables.h
2019-05-10 20:03:11 +02:00

218 lines
4.5 KiB
C++

/*
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/formal/SSAVariable.h>
#include <libsolidity/ast/Types.h>
#include <memory>
namespace dev
{
namespace solidity
{
namespace smt
{
class Type;
/**
* This abstract class represents the symbolic version of a program variable.
*/
class SymbolicVariable
{
public:
SymbolicVariable(
solidity::TypePointer _type,
std::string _uniqueName,
SolverInterface& _interface
);
SymbolicVariable(
SortPointer _sort,
std::string _uniqueName,
SolverInterface& _interface
);
virtual ~SymbolicVariable() = default;
Expression currentValue() const;
std::string currentName() const;
virtual Expression valueAtIndex(int _index) const;
virtual Expression increaseIndex();
virtual Expression operator()(std::vector<Expression> /*_arguments*/) const
{
solAssert(false, "Function application to non-function.");
}
unsigned index() const { return m_ssa->index(); }
unsigned& index() { return m_ssa->index(); }
solidity::TypePointer const& type() const { return m_type; }
protected:
std::string uniqueSymbol(unsigned _index) const;
/// SMT sort.
SortPointer m_sort;
/// Solidity type, used for size and range in number types.
solidity::TypePointer m_type;
std::string m_uniqueName;
SolverInterface& m_interface;
std::unique_ptr<SSAVariable> m_ssa;
};
/**
* Specialization of SymbolicVariable for Bool
*/
class SymbolicBoolVariable: public SymbolicVariable
{
public:
SymbolicBoolVariable(
solidity::TypePointer _type,
std::string _uniqueName,
SolverInterface& _interface
);
};
/**
* Specialization of SymbolicVariable for Integers
*/
class SymbolicIntVariable: public SymbolicVariable
{
public:
SymbolicIntVariable(
solidity::TypePointer _type,
std::string _uniqueName,
SolverInterface& _interface
);
};
/**
* Specialization of SymbolicVariable for Address
*/
class SymbolicAddressVariable: public SymbolicIntVariable
{
public:
SymbolicAddressVariable(
std::string _uniqueName,
SolverInterface& _interface
);
};
/**
* Specialization of SymbolicVariable for FixedBytes
*/
class SymbolicFixedBytesVariable: public SymbolicIntVariable
{
public:
SymbolicFixedBytesVariable(
unsigned _numBytes,
std::string _uniqueName,
SolverInterface& _interface
);
};
/**
* Specialization of SymbolicVariable for FunctionType
*/
class SymbolicFunctionVariable: public SymbolicVariable
{
public:
SymbolicFunctionVariable(
solidity::TypePointer _type,
std::string _uniqueName,
SolverInterface& _interface
);
Expression increaseIndex();
Expression operator()(std::vector<Expression> _arguments) const;
private:
/// Creates a new function declaration.
void resetDeclaration();
/// Stores the current function declaration.
Expression m_declaration;
};
/**
* Specialization of SymbolicVariable for Mapping
*/
class SymbolicMappingVariable: public SymbolicVariable
{
public:
SymbolicMappingVariable(
solidity::TypePointer _type,
std::string _uniqueName,
SolverInterface& _interface
);
};
/**
* Specialization of SymbolicVariable for Array
*/
class SymbolicArrayVariable: public SymbolicVariable
{
public:
SymbolicArrayVariable(
solidity::TypePointer _type,
std::string _uniqueName,
SolverInterface& _interface
);
};
/**
* Specialization of SymbolicVariable for Enum
*/
class SymbolicEnumVariable: public SymbolicVariable
{
public:
SymbolicEnumVariable(
solidity::TypePointer _type,
std::string _uniqueName,
SolverInterface& _interface
);
};
/**
* Specialization of SymbolicVariable for Tuple
*/
class SymbolicTupleVariable: public SymbolicVariable
{
public:
SymbolicTupleVariable(
solidity::TypePointer _type,
std::string _uniqueName,
SolverInterface& _interface
);
std::vector<std::shared_ptr<SymbolicVariable>> const& components()
{
return m_components;
}
void setComponents(std::vector<std::shared_ptr<SymbolicVariable>> _components);
private:
std::vector<std::shared_ptr<SymbolicVariable>> m_components;
};
}
}
}