It's interesting to note that High Energy Physicists all around the world will answer "yes", in fact they even created a C++ interpreter: https://root.cern.ch/drupal/content/cint.
This is what is being used now: https://root.cern.ch/drupal/content/cling.
But if I remember correctly, then CINT wasn't actually developed by the root-team, but rather already existed when work on root started.
[1] Read: complicated.