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/*
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/>.
*/
/**
* Component that verifies overloads, abstract contracts, function clashes and others
* checks at contract or function level.
*/
#pragma once
#include <libsolidity/ast/ASTForward.h>
#include <map>
namespace langutil
{
class ErrorReporter;
}
namespace dev
{
namespace solidity
{
/**
* Component that verifies overloads, abstract contracts, function clashes and others
* checks at contract or function level.
*/
class ContractLevelChecker
{
public:
/// @param _errorReporter provides the error logging functionality.
explicit ContractLevelChecker(langutil::ErrorReporter& _errorReporter):
m_errorReporter(_errorReporter)
{}
/// Performs checks on the given contract.
/// @returns true iff all checks passed. Note even if all checks passed, errors() can still contain warnings
bool check(ContractDefinition const& _contract);
private:
/// Checks that two functions defined in this contract with the same name have different
/// arguments and that there is at most one constructor.
void checkDuplicateFunctions(ContractDefinition const& _contract);
void checkDuplicateEvents(ContractDefinition const& _contract);
template <class T>
void findDuplicateDefinitions(std::map<std::string, std::vector<T>> const& _definitions, std::string _message);
void checkIllegalOverrides(ContractDefinition const& _contract);
/// Reports a type error with an appropriate message if overridden function signature differs.
/// Also stores the direct super function in the AST annotations.
void checkFunctionOverride(FunctionDefinition const& function, FunctionDefinition const& super);
void overrideError(FunctionDefinition const& function, FunctionDefinition const& super, std::string message);
void checkAbstractFunctions(ContractDefinition const& _contract);
void checkBaseConstructorArguments(ContractDefinition const& _contract);
void annotateBaseConstructorArguments(
ContractDefinition const& _currentContract,
FunctionDefinition const* _baseConstructor,
ASTNode const* _argumentNode
);
void checkConstructor(ContractDefinition const& _contract);
void checkFallbackFunction(ContractDefinition const& _contract);
/// Checks that different functions with external visibility end up having different
/// external argument types (i.e. different signature).
void checkExternalTypeClashes(ContractDefinition const& _contract);
/// Checks for hash collisions in external function signatures.
void checkHashCollisions(ContractDefinition const& _contract);
/// Checks that all requirements for a library are fulfilled if this is a library.
void checkLibraryRequirements(ContractDefinition const& _contract);
langutil::ErrorReporter& m_errorReporter;
};
}
}
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