Method uniqueInterfaceEvents

libsolidity/interface/Natspec.cpp:256–285

}

std::vector<EventDefinition const*>  Natspec::uniqueInterfaceEvents(ContractDefinition const& _contract)
{
	auto eventSignature = [](EventDefinition const* _event) -> std::string {
		FunctionType const* functionType = _event->functionType(true);
		solAssert(functionType, "");
		return functionType->externalSignature();
	};
	auto compareBySignature =
		[&](EventDefinition const* _lhs, EventDefinition const* _rhs) -> bool {
			return eventSignature(_lhs) < eventSignature(_rhs);
		};

	std::set<EventDefinition const*, decltype(compareBySignature)> uniqueEvents{compareBySignature};
	// Insert events defined in the contract first so that in case of a conflict
	// they're the ones that get selected.
	uniqueEvents += _contract.definedInterfaceEvents();

	std::set<EventDefinition const*, decltype(compareBySignature)> filteredUsedEvents{compareBySignature};
	std::set<std::string> usedSignatures;
	for (EventDefinition const* event: _contract.usedInterfaceEvents())
	{
		auto&& [eventIt, eventInserted] = filteredUsedEvents.insert(event);
		auto&& [signatureIt, signatureInserted] = usedSignatures.insert(eventSignature(event));
		if (!signatureInserted)
			filteredUsedEvents.erase(eventIt);
	}

	uniqueEvents += filteredUsedEvents;
	return util::convertContainer<std::vector<EventDefinition const*>>(std::move(uniqueEvents));
}