338                             as_token: None,  in ambig_ty()
362         let mut lifetimes = None::<BoundLifetimes>;  in ambig_ty()
398                     dyn_token: None,  in ambig_ty()
443                         Type::Path(TypePath { qself: None, path }) => {  in ambig_ty()
446                                 modifier: TraitBoundModifier::None,  in ambig_ty()
447                                 lifetimes: None,  in ambig_ty()
452                             dyn_token: None,  in ambig_ty()
457                                     dyn_token: None,  in ambig_ty()
477                         dyn_token: None,  in ambig_ty()
538                     paren_token: None,  in ambig_ty()
539                     modifier: TraitBoundModifier::None,  in ambig_ty()
562                     dyn_token: None,  in ambig_ty()
646                 (Some(input.parse()?), None)  in parse()
648                 (None, Some(input.parse()?))  in parse()
679             let mut variadic = None;  in parse()
838                 None => input.span(),  in parse()
857             let mut last_lifetime_span = None;  in parse_bounds()
907             let mut last_nontrait_span = None;  in parse()
1010             None  in parse_bare_fn_arg()
1017             None  in parse_bare_fn_arg()
1020             None  in parse_bare_fn_arg()
1028                 name = None;  in parse_bare_fn_arg()
1044                 None  in parse_bare_variadic()
1067                 Ok(None)  in parse()
1113                 None => {  in to_tokens()