Method getRegisteredInstruments

BambooTracker/module/song.cpp:205–213

}

std::set<int> Song::getRegisteredInstruments() const
{
	std::set<int> set;
	for (const Track& track : tracks_) {
		auto&& subset = track.getRegisteredInstruments();
		std::copy(subset.begin(), subset.end(), std::inserter(set, set.end()));
	}
	return set;
}

void Song::clearUnusedPatterns()
{