Function () with no paramater and pipe, AND, function () with 1 paramater and use

[bobjoe12131]

fn foo(n) {
  n + 1
}

fn baz(fun) {
  foo(fun())
}

fn main() {
  let bar = 1
  let a = bar |> foo() // works
  let a = a |> foo // also works
  use <- baz() // also also works
  use <- baz // also also also works
  a
}

Why does the formatter and/or the compiler allow both parentheses and no parentheses?
Currently I use parentheses cause it looks like I am calling the function, and it does not get colored in vscode otherwise. but Ive seen others code use none.
Which should i use?

[lpil]

Why does the formatter and/or the compiler allow both parentheses and no parentheses?

Because there's no way to know if it's safe to remove parens without performing type checking. It's recommended not to use parens.