1 use alloc::rc::Rc; 2 use core::marker::PhantomData; 3 use core::panic::{RefUnwindSafe, UnwindSafe}; 4 5 // Zero sized marker with the correct set of autotrait impls we want all proc 6 // macro types to have. 7 pub(crate) type Marker = PhantomData<ProcMacroAutoTraits>; 8 9 pub(crate) use self::value::*; 10 11 mod value { 12 pub(crate) use core::marker::PhantomData as Marker; 13 } 14 15 pub(crate) struct ProcMacroAutoTraits( 16 #[allow(dead_code)] // https://github.com/rust-lang/rust/issues/119645 17 Rc<()>, 18 ); 19 20 impl UnwindSafe for ProcMacroAutoTraits {} 21 impl RefUnwindSafe for ProcMacroAutoTraits {} 22