mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
81 lines
2.7 KiB
C++
81 lines
2.7 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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#pragma once
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#include <libsolidity/ast/ASTVisitor.h>
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#include <liblangutil/ErrorReporter.h>
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#include <memory>
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namespace solidity::frontend
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{
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/**
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* Validates access and initialization of immutable variables:
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* must be directly initialized in their respective c'tor
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* can not be read by any function/modifier called by the c'tor (or the c'tor itself)
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* must be initialized outside loops (only one initialization)
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* must be initialized outside ifs (must be initialized unconditionally)
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* must be initialized exactly once (no multiple statements)
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* must be initialized exactly once (no early return to skip initialization)
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*/
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class ImmutableValidator: private ASTConstVisitor
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{
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using CallableDeclarationSet = std::set<CallableDeclaration const*, ASTNode::CompareByID>;
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public:
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ImmutableValidator(langutil::ErrorReporter& _errorReporter, ContractDefinition const& _contractDefinition):
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m_currentContract(_contractDefinition),
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m_errorReporter(_errorReporter)
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{ }
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void analyze();
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private:
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bool visit(FunctionDefinition const& _functionDefinition);
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bool visit(ModifierDefinition const& _modifierDefinition);
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bool visit(MemberAccess const& _memberAccess);
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bool visit(IfStatement const& _ifStatement);
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bool visit(WhileStatement const& _whileStatement);
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void endVisit(IdentifierPath const& _identifierPath);
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void endVisit(Identifier const& _identifier);
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void endVisit(Return const& _return);
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bool analyseCallable(CallableDeclaration const& _callableDeclaration);
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void analyseVariableReference(VariableDeclaration const& _variableReference, Expression const& _expression);
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void checkAllVariablesInitialized(langutil::SourceLocation const& _location);
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void visitCallableIfNew(Declaration const& _declaration);
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ContractDefinition const& m_currentContract;
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CallableDeclarationSet m_visitedCallables;
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std::set<VariableDeclaration const*, ASTNode::CompareByID> m_initializedStateVariables;
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langutil::ErrorReporter& m_errorReporter;
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FunctionDefinition const* m_currentConstructor = nullptr;
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bool m_inLoop = false;
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bool m_inBranch = false;
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bool m_inConstructionContext = false;
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};
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}
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