1 //! Various data structures used by the Rust compiler. The intention
2 //! is that code in here should be not be *specific* to rustc, so that
3 //! it can be easily unit tested and so forth.
7 //! This API is completely unstable and subject to change.
9 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]
10 #![feature(in_band_lifetimes)]
11 #![feature(unboxed_closures)]
12 #![feature(generators)]
13 #![feature(generator_trait)]
14 #![feature(fn_traits)]
15 #![feature(min_specialization)]
16 #![feature(optin_builtin_traits)]
18 #![feature(allow_internal_unstable)]
19 #![feature(hash_raw_entry)]
20 #![feature(stmt_expr_attributes)]
21 #![feature(core_intrinsics)]
23 #![feature(associated_type_bounds)]
24 #![feature(thread_id_value)]
25 #![feature(extend_one)]
26 #![allow(rustc::default_hash_types)]
33 extern crate rustc_macros;
37 pub fn cold_path<F: FnOnce() -> R, R>(f: F) -> R {
44 #[allow(unused_unsafe)]
46 unsafe { std::intrinsics::likely($e) }
52 macro_rules! unlikely {
54 #[allow(unused_unsafe)]
56 unsafe { std::intrinsics::unlikely($e) }
62 pub mod binary_search_util;
72 pub mod obligation_forest;
80 pub use ena::snapshot_vec;
84 pub mod stable_hasher;
90 pub mod transitive_relation;
91 pub use ena::undo_log;
96 pub mod vec_linked_list;
98 pub use atomic_ref::AtomicRef;
102 pub struct OnDrop<F: Fn()>(pub F);
104 impl<F: Fn()> OnDrop<F> {
105 /// Forgets the function which prevents it from running.
106 /// Ensure that the function owns no memory, otherwise it will be leaked.
108 pub fn disable(self) {
109 std::mem::forget(self);
113 impl<F: Fn()> Drop for OnDrop<F> {
120 // See comments in src/librustc_middle/lib.rs
122 pub fn __noop_fix_for_27438() {}