Method checkExternalTypeClashes

libsolidity/analysis/ContractLevelChecker.cpp:466–501

}

void ContractLevelChecker::checkExternalTypeClashes(ContractDefinition const& _contract)
{
	std::map<std::string, std::vector<std::pair<Declaration const*, FunctionTypePointer>>> externalDeclarations;
	for (ContractDefinition const* contract: _contract.annotation().linearizedBaseContracts)
	{
		for (FunctionDefinition const* f: contract->definedFunctions())
			if (f->isPartOfExternalInterface())
			{
				auto functionType = TypeProvider::function(*f);
				// under non error circumstances this should be true
				if (functionType->interfaceFunctionType())
					externalDeclarations[functionType->externalSignature()].emplace_back(
						f, functionType->asExternallyCallableFunction(false)
					);
			}
		for (VariableDeclaration const* v: contract->stateVariables())
			if (v->isPartOfExternalInterface())
			{
				auto functionType = TypeProvider::function(*v);
				// under non error circumstances this should be true
				if (functionType->interfaceFunctionType())
					externalDeclarations[functionType->externalSignature()].emplace_back(
						v, functionType->asExternallyCallableFunction(false)
					);
			}
	}
	for (auto const& it: externalDeclarations)
		for (size_t i = 0; i < it.second.size(); ++i)
			for (size_t j = i + 1; j < it.second.size(); ++j)
				if (!it.second[i].second->hasEqualParameterTypes(*it.second[j].second))
					m_errorReporter.typeError(
						9914_error,
						it.second[j].first->location(),
						"Function overload clash during conversion to external types for arguments."
					);
}

void ContractLevelChecker::checkHashCollisions(ContractDefinition const& _contract)
{