mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
86 lines
2.9 KiB
C++
86 lines
2.9 KiB
C++
/*
|
|
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/>.
|
|
*/
|
|
// SPDX-License-Identifier: GPL-3.0
|
|
|
|
#pragma once
|
|
|
|
#include <libsolidity/ast/ASTVisitor.h>
|
|
#include <liblangutil/ErrorReporter.h>
|
|
|
|
#include <memory>
|
|
|
|
namespace solidity::frontend
|
|
{
|
|
|
|
/**
|
|
* Validates access and initialization of immutable variables:
|
|
* must be directly initialized in their respective c'tor or inline
|
|
* cannot be read before being initialized
|
|
* cannot be read when initializing state variables inline
|
|
* must be initialized outside loops (only one initialization)
|
|
* must be initialized outside ifs (must be initialized unconditionally)
|
|
* must be initialized exactly once (no multiple statements)
|
|
* must be initialized exactly once (no early return to skip initialization)
|
|
*/
|
|
class ImmutableValidator: private ASTConstVisitor
|
|
{
|
|
using CallableDeclarationSet = std::set<CallableDeclaration const*, ASTNode::CompareByID>;
|
|
|
|
public:
|
|
ImmutableValidator(langutil::ErrorReporter& _errorReporter, ContractDefinition const& _contractDefinition):
|
|
m_mostDerivedContract(_contractDefinition),
|
|
m_errorReporter(_errorReporter)
|
|
{ }
|
|
|
|
void analyze();
|
|
|
|
private:
|
|
bool visit(Assignment const& _assignment);
|
|
bool visit(FunctionDefinition const& _functionDefinition);
|
|
bool visit(ModifierDefinition const& _modifierDefinition);
|
|
bool visit(MemberAccess const& _memberAccess);
|
|
bool visit(IfStatement const& _ifStatement);
|
|
bool visit(WhileStatement const& _whileStatement);
|
|
bool visit(TryStatement const& _tryStatement);
|
|
void endVisit(IdentifierPath const& _identifierPath);
|
|
void endVisit(Identifier const& _identifier);
|
|
void endVisit(Return const& _return);
|
|
|
|
bool analyseCallable(CallableDeclaration const& _callableDeclaration);
|
|
void analyseVariableReference(VariableDeclaration const& _variableReference, Expression const& _expression);
|
|
|
|
void checkAllVariablesInitialized(langutil::SourceLocation const& _location);
|
|
|
|
void visitCallableIfNew(Declaration const& _declaration);
|
|
|
|
ContractDefinition const& m_mostDerivedContract;
|
|
|
|
CallableDeclarationSet m_visitedCallables;
|
|
|
|
std::set<VariableDeclaration const*, ASTNode::CompareByID> m_initializedStateVariables;
|
|
langutil::ErrorReporter& m_errorReporter;
|
|
|
|
FunctionDefinition const* m_currentConstructor = nullptr;
|
|
ContractDefinition const* m_currentConstructorContract = nullptr;
|
|
bool m_inLoop = false;
|
|
bool m_inBranch = false;
|
|
bool m_inCreationContext = true;
|
|
bool m_inTryStatement = false;
|
|
};
|
|
|
|
}
|