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1 //! The "main crate" of the Rust compiler. This crate contains common
2 //! type definitions that are used by the other crates in the rustc
3 //! "family". Some prominent examples (note that each of these modules
4 //! has their own README with further details).
5 //!
6 //! - **HIR.** The "high-level (H) intermediate representation (IR)" is
7 //!   defined in the `hir` module.
8 //! - **MIR.** The "mid-level (M) intermediate representation (IR)" is
9 //!   defined in the `mir` module. This module contains only the
10 //!   *definition* of the MIR; the passes that transform and operate
11 //!   on MIR are found in `rustc_const_eval` crate.
12 //! - **Types.** The internal representation of types used in rustc is
13 //!   defined in the `ty` module. This includes the **type context**
14 //!   (or `tcx`), which is the central context during most of
15 //!   compilation, containing the interners and other things.
16 //!
17 //! For more information about how rustc works, see the [rustc dev guide].
18 //!
19 //! [rustc dev guide]: https://rustc-dev-guide.rust-lang.org/
20 //!
21 //! # Note
22 //!
23 //! This API is completely unstable and subject to change.
24
25 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
26 #![feature(allocator_api)]
27 #![feature(array_windows)]
28 #![feature(assert_matches)]
29 #![feature(box_patterns)]
30 #![feature(core_intrinsics)]
31 #![feature(discriminant_kind)]
32 #![feature(exhaustive_patterns)]
33 #![feature(generators)]
34 #![feature(get_mut_unchecked)]
35 #![feature(if_let_guard)]
36 #![feature(iter_from_generator)]
37 #![feature(negative_impls)]
38 #![feature(never_type)]
39 #![feature(extern_types)]
40 #![feature(new_uninit)]
41 #![feature(once_cell)]
42 #![feature(let_chains)]
43 #![feature(min_specialization)]
44 #![feature(trusted_len)]
45 #![feature(type_alias_impl_trait)]
46 #![feature(associated_type_bounds)]
47 #![feature(rustc_attrs)]
48 #![feature(control_flow_enum)]
49 #![feature(associated_type_defaults)]
50 #![feature(trusted_step)]
51 #![feature(try_blocks)]
52 #![feature(try_reserve_kind)]
53 #![feature(nonzero_ops)]
54 #![feature(unwrap_infallible)]
55 #![feature(decl_macro)]
56 #![feature(drain_filter)]
57 #![feature(intra_doc_pointers)]
58 #![feature(yeet_expr)]
59 #![feature(result_option_inspect)]
60 #![feature(const_option)]
61 #![recursion_limit = "512"]
62 #![allow(rustc::potential_query_instability)]
63
64 #[macro_use]
65 extern crate bitflags;
66 #[macro_use]
67 extern crate rustc_macros;
68 #[macro_use]
69 extern crate rustc_data_structures;
70 #[macro_use]
71 extern crate tracing;
72 #[macro_use]
73 extern crate smallvec;
74
75 #[cfg(test)]
76 mod tests;
77
78 #[macro_use]
79 mod macros;
80
81 #[macro_use]
82 pub mod query;
83
84 #[macro_use]
85 pub mod arena;
86 #[macro_use]
87 pub mod dep_graph;
88 pub(crate) mod error;
89 pub mod hir;
90 pub mod infer;
91 pub mod lint;
92 pub mod metadata;
93 pub mod middle;
94 pub mod mir;
95 pub mod thir;
96 pub mod traits;
97 pub mod ty;
98 mod values;
99
100 pub mod util {
101     pub mod bug;
102     pub mod common;
103 }
104
105 // Allows macros to refer to this crate as `::rustc_middle`
106 extern crate self as rustc_middle;