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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 <map>
#include <string>
#include <vector>
#include <libdevcore/Common.h>
namespace dev
{
namespace solidity
{
namespace smt
{
enum class CheckResult
{
SAT, UNSAT, UNKNOWN
};
enum class Sort
{
Int, Bool
};
class Expression
{
friend class SMTLib2Interface;
/// Manual constructor, should only be used by SMTLib2Interface and the class itself.
Expression(std::string _name, std::vector<Expression> _arguments):
m_name(std::move(_name)), m_arguments(std::move(_arguments)) {}
public:
Expression(size_t _number): m_name(std::to_string(_number)) {}
Expression(u256 const& _number): m_name(std::to_string(_number)) {}
Expression(Expression const& _other) = default;
Expression(Expression&& _other) = default;
Expression& operator=(Expression const& _other) = default;
Expression& operator=(Expression&& _other) = default;
friend Expression operator!(Expression _a)
{
return Expression("not", _a);
}
friend Expression operator&&(Expression _a, Expression _b)
{
return Expression("and", _a, _b);
}
friend Expression operator||(Expression _a, Expression _b)
{
return Expression("or", _a, _b);
}
friend Expression operator==(Expression _a, Expression _b)
{
return Expression("=", _a, _b);
}
friend Expression operator!=(Expression _a, Expression _b)
{
return !(_a == _b);
}
friend Expression operator<(Expression _a, Expression _b)
{
return Expression("<", std::move(_a), std::move(_b));
}
friend Expression operator<=(Expression _a, Expression _b)
{
return Expression("<=", std::move(_a), std::move(_b));
}
friend Expression operator>(Expression _a, Expression _b)
{
return Expression(">", std::move(_a), std::move(_b));
}
friend Expression operator>=(Expression _a, Expression _b)
{
return Expression(">=", std::move(_a), std::move(_b));
}
friend Expression operator+(Expression _a, Expression _b)
{
return Expression("+", std::move(_a), std::move(_b));
}
friend Expression operator-(Expression _a, Expression _b)
{
return Expression("-", std::move(_a), std::move(_b));
}
friend Expression operator*(Expression _a, Expression _b)
{
return Expression("*", std::move(_a), std::move(_b));
}
std::string toSExpr() const
{
std::string sexpr = "(" + m_name;
for (auto const& arg: m_arguments)
sexpr += " " + arg.toSExpr();
sexpr += ")";
return sexpr;
}
private:
explicit Expression(std::string _name):
Expression(std::move(_name), std::vector<Expression>{}) {}
Expression(std::string _name, Expression _arg):
Expression(std::move(_name), std::vector<Expression>{std::move(_arg)}) {}
Expression(std::string _name, Expression _arg1, Expression _arg2):
Expression(std::move(_name), std::vector<Expression>{std::move(_arg1), std::move(_arg2)}) {}
std::string const m_name;
std::vector<Expression> const m_arguments;
};
class SMTLib2Interface
{
public:
void reset();
void push();
void pop();
Expression newFunction(std::string _name, Sort _domain, Sort _codomain);
Expression newInteger(std::string _name);
Expression newBool(std::string _name);
void addAssertion(Expression _expr);
CheckResult check();
std::string eval(Expression _expr);
};
}
}
}
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