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/")]
11 #![feature(in_band_lifetimes)]
12 #![feature(unboxed_closures)]
13 #![feature(generators)]
14 #![feature(generator_trait)]
15 #![feature(fn_traits)]
17 #![feature(specialization)]
18 #![feature(optin_builtin_traits)]
20 #![feature(allow_internal_unstable)]
21 #![feature(hash_raw_entry)]
22 #![feature(stmt_expr_attributes)]
23 #![feature(core_intrinsics)]
24 #![feature(integer_atomics)]
26 #![cfg_attr(unix, feature(libc))]
27 #![cfg_attr(test, feature(test))]
29 #![deny(rust_2018_idioms)]
33 #[allow(unused_extern_crates)]
34 extern crate serialize as rustc_serialize; // used by deriving
40 // See librustc_cratesio_shim/Cargo.toml for a comment explaining this.
41 #[allow(unused_extern_crates)]
42 extern crate rustc_cratesio_shim;
44 pub use rustc_serialize::hex::ToHex;
48 pub fn cold_path<F: FnOnce() -> R, R>(f: F) -> R {
55 #[allow(unused_unsafe)]
57 unsafe { std::intrinsics::likely($e) }
63 macro_rules! unlikely {
65 #[allow(unused_unsafe)]
67 unsafe { std::intrinsics::unlikely($e) }
84 pub mod obligation_forest;
90 pub use ena::snapshot_vec;
92 #[macro_use] pub mod stable_hasher;
96 pub mod transitive_relation;
98 pub mod vec_linked_list;
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/lib.rs
122 pub fn __noop_fix_for_27438() {}