How to convert between different point cloud types using PCL?

edit

I wonder whether there is an elegant way to convert instances of pcl::PointCloud<pcl::PointXYZ> to pcl::PointCloud<pcl::PointXYZRGB>and vice-versa?

I am trying to load point cloud data from a .pcd-file that only includes XYZ data. Finally, I want to feed this point cloud into a module that requires PointXYZRGB data (but actually does not use the RGB data).

My current solution is to call pcd::io::loadPCDFile in order to populate pcl::PointCloud<pcl::PointXYZ> and then just copy points over one-by-one to a XYZRGB point cloud. Note that I am relatively new to C++ programming and might have overseen an obvious solution.

(I am using diamondback)