357             Precedence::Assign | Precedence::Let | Precedence::Prefix => {  in rightmost_subexpression_precedence()
483         Expr::Assign(_) => fixup.previous_operator <= Precedence::Assign,  in scan_left()
485             Precedence::Assign => fixup.previous_operator <= Precedence::Assign,  in scan_left()
489         Expr::Range(e) => e.start.is_none() || fixup.previous_operator < Precedence::Assign,  in scan_left()
503         Precedence::Assign | Precedence::Compare => precedence <= fixup.next_operator,  in scan_right()
515         Expr::Assign(e) if e.attrs.is_empty() => {  in scan_right()
522             let right_fixup = fixup.rightmost_subexpression_fixup(false, false, Precedence::Assign);  in scan_right()
526                 Precedence::Assign,  in scan_right()
571             let right_needs_group = binop_prec != Precedence::Assign  in scan_right()
630                         Precedence::Assign | Precedence::Range => 0,  in scan_right()
636                     (Scan::Bailout, Precedence::Assign | Precedence::Range) => false,  in scan_right()
667                 Precedence::Assign if precedence > Precedence::Assign => Scan::Fail,  in scan_right()
684                 Precedence::Assign if precedence > Precedence::Assign => Scan::Fail,  in scan_right()
737         | Expr::Assign(_)  in scan_right()
768             Precedence::Assign | Precedence::Range if precedence == Precedence::Range => Scan::Fail,  in scan_right()