C++ Map to Values

// canonical way
template<typename MapType>
auto map_vals(const MapType& m)
{
	vector<typename MapType::mapped_type> res;
	res.reserve(m.size());
	transform(begin(m), end(m), back_inserter(res), [](const auto& p) {
	   return p.second; 
	});
	return res;
}

// Less efficient than the canonical one but more concise :)
template<typename MapType>
auto map_vals(const MapType& m)
{
   return accumulate(begin(m), end(m), vector<typename MapType::mapped_type>(), [](auto& values, const auto& curr){
        values.emplace_back(curr.second);
        return move(values);
   });
}