vendor/proc-macro2/src/marker.rs

   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(Rc<()>);
  16
  17 impl UnwindSafe for ProcMacroAutoTraits {}
  18 impl RefUnwindSafe for ProcMacroAutoTraits {}