After dislocating my shoulder, I managed to write this patch [1] using my left hand only. Luckily I don't write c++ anymore :) Sadly, I'm used to touch type :(
Honestly, I now can feel the pain a hand disabled programmer can feel, total respect for those constantly writing in such conditions. Not being able to catch up your brain speed is really frustrating.
[1]
https://github.com/haskell-nix/hnix/pull/325#pullrequestreview-131745715