//!
//! [rustc dev guide]: https://rustc-dev-guide.rust-lang.org/hir.html
-#![feature(array_value_iter)]
#![feature(crate_visibility_modifier)]
#![feature(const_fn)] // For the unsizing cast on `&[]`
#![feature(const_panic)]
#![feature(in_band_lifetimes)]
+#![feature(iterator_fold_self)]
#![feature(once_cell)]
#![feature(or_patterns)]
#![recursion_limit = "256"]