Constant proc_macro::__internal::CURRENT_SESS[]

const CURRENT_SESS: LocalKey<Cell<ProcMacroSess>> = {
    #[inline]
    fn __init() -> Cell<ProcMacroSess> { loop  { } }
    unsafe fn __getit()
     ->
         ::option::Option<&'static ::cell::UnsafeCell<::option::Option<Cell<ProcMacroSess>>>> {
                                                                                                  loop 
                                                                                                       {
                                                                                                  }
                                                                                              }
    unsafe { <::thread::LocalKey>::new(__getit, __init) }
}
🔬 This is a nightly-only experimental API. (proc_macro_internals #27812)