++ operator?

General Usage
1

The documentation for master mentions an operator ++. I can see that it is parsed, but what does it do?

I am aware of #11868, but other infix operators are also parsed (and left undefined), so I don’t see why ++ is mentioned explicitly in the precedence discussions.

2

No predefined meaning. AFAICT the reason it’s mentioned is pretty clear. The note that mentions them does not apply to any random operators.

3

It’s for one of the most core Julia packages.

https://github.com/pkofod/PlusPlus.jl