Documentation for prefix ++⚛ assembled from the following pages:

Class: atomicint §

From atomicint

(atomicint) prefix ++⚛ §

multi sub prefix:<++⚛>(atomicint $ is rw)

Performs an atomic increment on a native integer. This will be performed using hardware-provided atomic operations. Since the operation is atomic, it is safe to use without acquiring a lock. Returns the value resulting from the increment. Overflow will wrap around silently.