mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
76 lines
2.0 KiB
C++
76 lines
2.0 KiB
C++
/*
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This file is part of solidity.
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solidity is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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solidity is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with solidity. If not, see <http://www.gnu.org/licenses/>.
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*/
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// SPDX-License-Identifier: GPL-3.0
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/**
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* @author Christian <c@ethdev.com>
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* @date 2015
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* Evaluator for types of constant expressions.
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*/
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#pragma once
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#include <libsolidity/ast/ASTVisitor.h>
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#include <utility>
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namespace solidity::langutil
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{
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class ErrorReporter;
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}
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namespace solidity::frontend
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{
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class TypeChecker;
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/**
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* Small drop-in replacement for TypeChecker to evaluate simple expressions of integer constants.
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*/
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class ConstantEvaluator: private ASTConstVisitor
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{
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public:
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ConstantEvaluator(
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langutil::ErrorReporter& _errorReporter,
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size_t _newDepth = 0,
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std::shared_ptr<std::map<ASTNode const*, TypePointer>> _types = std::make_shared<std::map<ASTNode const*, TypePointer>>()
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):
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m_errorReporter(_errorReporter),
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m_depth(_newDepth),
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m_types(std::move(_types))
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{
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}
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TypePointer evaluate(Expression const& _expr);
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private:
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void endVisit(BinaryOperation const& _operation) override;
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void endVisit(UnaryOperation const& _operation) override;
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void endVisit(Literal const& _literal) override;
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void endVisit(Identifier const& _identifier) override;
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void endVisit(TupleExpression const& _tuple) override;
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void setType(ASTNode const& _node, TypePointer const& _type);
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TypePointer type(ASTNode const& _node);
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langutil::ErrorReporter& m_errorReporter;
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/// Current recursion depth.
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size_t m_depth = 0;
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std::shared_ptr<std::map<ASTNode const*, TypePointer>> m_types;
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};
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}
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