//! This API is completely unstable and subject to change.
#![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]
-#![feature(bool_to_option)]
#![feature(in_band_lifetimes)]
#![feature(nll)]
-#![feature(slice_patterns)]
+#![cfg_attr(bootstrap, feature(slice_patterns))]
#![recursion_limit = "256"]
#[macro_use]