error[E0277]: the trait bound `Ipv4Addr: ToTokens` is not satisfied --> tests/ui/not-quotable.rs:6:13 | 6 | let _ = quote! { #ip }; | ^^^^^^^^^^^^^^ | | | the trait `ToTokens` is not implemented for `Ipv4Addr` | required by a bound introduced by this call | = help: the following other types implement trait `ToTokens`: bool char isize i8 i16 i32 i64 i128 and $N others = note: this error originates in the macro `quote` (in Nightly builds, run with -Z macro-backtrace for more info)