Make `mix format` work with pipeline macros

Background

I use a library that defines a new pipeline macro, the triple arrow >>>. So in my code, it is normal to have something like this:

def safe_div(a, b), do:
  a 
  |> divide(b)
  >>> handle_result()

This magic here is in handle_result. What the >>> does is not important, what matters here is that this is a type of format that I want to see in my code.

Problem

The problem here is the mix format does not know how that it should treat >>> as it treats |>. So inevitably my code becomes:

def safe_div(a, b), do:
  a 
  |> divide(b) >>> handle_result()

Which is very ugly and impossible to read for larger functions.

I have tried to find a way to change mix format’s configuration to fix this issue, unfortunately I was not able to find anything.

Question

• Can I configure mix format to treat >>> as a |> ?
• If not, would it be a bad idea to make a PR where people would be allowed to define “pipelike” operators/macros, thus telling mix format how to behave?

Basically, what options do I have here ?