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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/>.
*/
/**
* @author Christian <c@ethdev.com>
* @date 2015
* Evaluator for types of constant expressions.
*/
#pragma once
#include <libsolidity/ast/ASTVisitor.h>
namespace langutil
{
class ErrorReporter;
}
namespace dev
{
namespace solidity
{
class TypeChecker;
/**
* Small drop-in replacement for TypeChecker to evaluate simple expressions of integer constants.
*/
class ConstantEvaluator: private ASTConstVisitor
{
public:
ConstantEvaluator(
langutil::ErrorReporter& _errorReporter,
size_t _newDepth = 0,
std::shared_ptr<std::map<ASTNode const*, TypePointer>> _types = std::make_shared<std::map<ASTNode const*, TypePointer>>()
):
m_errorReporter(_errorReporter),
m_depth(_newDepth),
m_types(_types)
{
}
TypePointer evaluate(Expression const& _expr);
private:
virtual void endVisit(BinaryOperation const& _operation);
virtual void endVisit(UnaryOperation const& _operation);
virtual void endVisit(Literal const& _literal);
virtual void endVisit(Identifier const& _identifier);
virtual void endVisit(TupleExpression const& _tuple);
void setType(ASTNode const& _node, TypePointer const& _type);
TypePointer type(ASTNode const& _node);
langutil::ErrorReporter& m_errorReporter;
/// Current recursion depth.
size_t m_depth = 0;
std::shared_ptr<std::map<ASTNode const*, TypePointer>> m_types;
};
}
}
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