Method findDuplicateDefinitions

libsolidity/analysis/ContractLevelChecker.cpp:233–290

template <class T>
void ContractLevelChecker::findDuplicateDefinitions(std::map<std::string, std::vector<T>> const& _definitions)
{
	for (auto const& it: _definitions)
	{
		std::vector<T> const& overloads = it.second;
		std::set<size_t> reported;
		for (size_t i = 0; i < overloads.size() && !reported.count(i); ++i)
		{
			SecondarySourceLocation ssl;

			for (size_t j = i + 1; j < overloads.size(); ++j)
				if (hasEqualExternalCallableParameters(*overloads[i], *overloads[j]))
				{
					solAssert(
						(
							dynamic_cast<ContractDefinition const*>(overloads[i]->scope()) &&
							dynamic_cast<ContractDefinition const*>(overloads[j]->scope()) &&
							overloads[i]->name() == overloads[j]->name()
						) ||
						(
							dynamic_cast<SourceUnit const*>(overloads[i]->scope()) &&
							dynamic_cast<SourceUnit const*>(overloads[j]->scope())
						),
						"Override is neither a namesake function/event in contract scope nor "
						"a free function/event (alias)."
					);
					ssl.append("Other declaration is here:", overloads[j]->location());
					reported.insert(j);
				}

			if (ssl.infos.size() > 0)
			{
				ErrorId error;
				std::string message;
				if constexpr (std::is_same_v<T, FunctionDefinition const*>)
				{
					error = 1686_error;
					message = "Function with same name and parameter types defined twice.";
				}
				else
				{
					static_assert(std::is_same_v<T, EventDefinition const*>, "Expected \"FunctionDefinition const*\" or \"EventDefinition const*\"");
					error = 5883_error;
					message = "Event with same name and parameter types defined twice.";
				}

				ssl.limitSize(message);

				m_errorReporter.declarationError(
					error,
					overloads[i]->location(),
					ssl,
					message
				);
			}
		}
	}
}