mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
69 lines
2.3 KiB
C++
69 lines
2.3 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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#include <libsolidity/analysis/ImmutableValidator.h>
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#include <range/v3/view/reverse.hpp>
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using namespace solidity::frontend;
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using namespace solidity::langutil;
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void ImmutableValidator::analyze()
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{
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auto linearizedContracts = m_mostDerivedContract.annotation().linearizedBaseContracts | ranges::views::reverse;
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for (ContractDefinition const* contract: linearizedContracts)
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{
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for (FunctionDefinition const* function: contract->definedFunctions())
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function->accept(*this);
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for (ModifierDefinition const* modifier: contract->functionModifiers())
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modifier->accept(*this);
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}
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}
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bool ImmutableValidator::visit(FunctionDefinition const& _functionDefinition)
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{
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return !_functionDefinition.isConstructor();
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}
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void ImmutableValidator::endVisit(MemberAccess const& _memberAccess)
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{
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analyseVariableReference(_memberAccess.annotation().referencedDeclaration, _memberAccess);
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}
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void ImmutableValidator::endVisit(Identifier const& _identifier)
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{
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analyseVariableReference(_identifier.annotation().referencedDeclaration, _identifier);
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}
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void ImmutableValidator::analyseVariableReference(Declaration const* _reference, Expression const& _expression)
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{
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auto const* variable = dynamic_cast<VariableDeclaration const*>(_reference);
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if (!variable || !variable->isStateVariable() || !variable->immutable())
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return;
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// If this is not an ordinary assignment, we write and read at the same time.
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if (_expression.annotation().willBeWrittenTo)
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m_errorReporter.typeError(
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1581_error,
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_expression.location(),
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"Cannot write to immutable here: Immutable variables can only be initialized inline or assigned directly in the constructor."
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);
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}
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