babel/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/hack-hash/pipe-in-arrow-function/input.js

const result = () => -2.2 // -2.2
  |> Math.floor(#) // -3
  |> (() => Math.pow(#, 5)) // () => -243
  |> #(); // -243

expect(result()).toBe(-243);