mirror of
https://github.com/ethereum/solidity
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60 lines
2.3 KiB
C++
60 lines
2.3 KiB
C++
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/*
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This file is part of cpp-ethereum.
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cpp-ethereum 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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cpp-ethereum 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 cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
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*/
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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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#include <libsolidity/ConstantEvaluator.h>
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#include <libsolidity/AST.h>
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using namespace std;
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using namespace dev;
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using namespace dev::solidity;
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void ConstantEvaluator::endVisit(UnaryOperation const& _operation)
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{
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TypePointer const& subType = _operation.subExpression().annotation().type;
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if (!dynamic_cast<IntegerConstantType const*>(subType.get()))
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BOOST_THROW_EXCEPTION(_operation.subExpression().createTypeError("Invalid constant expression."));
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TypePointer t = subType->unaryOperatorResult(_operation.getOperator());
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_operation.annotation().type = t;
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}
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void ConstantEvaluator::endVisit(BinaryOperation const& _operation)
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{
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TypePointer const& leftType = _operation.leftExpression().annotation().type;
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TypePointer const& rightType = _operation.rightExpression().annotation().type;
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if (!dynamic_cast<IntegerConstantType const*>(leftType.get()))
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BOOST_THROW_EXCEPTION(_operation.leftExpression().createTypeError("Invalid constant expression."));
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if (!dynamic_cast<IntegerConstantType const*>(rightType.get()))
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BOOST_THROW_EXCEPTION(_operation.rightExpression().createTypeError("Invalid constant expression."));
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TypePointer commonType = leftType->binaryOperatorResult(_operation.getOperator(), rightType);
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if (Token::isCompareOp(_operation.getOperator()))
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commonType = make_shared<BoolType>();
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_operation.annotation().type = commonType;
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}
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void ConstantEvaluator::endVisit(Literal const& _literal)
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{
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_literal.annotation().type = Type::forLiteral(_literal);
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if (!_literal.annotation().type)
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BOOST_THROW_EXCEPTION(_literal.createTypeError("Invalid literal value."));
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}
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