Function needs_par_as_let_scrutinee

pub fn needs_par_as_let_scrutinee(order: i8) -> bool

Suppose we have let _ = e and the order of e. Is the order such that e in let _ = e needs parentheses when it is on the RHS?

Conversely, suppose that we have (let _ = a) OP b and order is that of OP. Can we print this as let _ = a OP b?