1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 //! # The Rust Core Library
13 //! The Rust Core Library is the dependency-free[^free] foundation of [The
14 //! Rust Standard Library](../std/index.html). It is the portable glue
15 //! between the language and its libraries, defining the intrinsic and
16 //! primitive building blocks of all Rust code. It links to no
17 //! upstream libraries, no system libraries, and no libc.
19 //! [^free]: Strictly speaking, there are some symbols which are needed but
20 //! they aren't always necessary.
22 //! The core library is *minimal*: it isn't even aware of heap allocation,
23 //! nor does it provide concurrency or I/O. These things require
24 //! platform integration, and this library is platform-agnostic.
26 //! # How to use the core library
28 //! Please note that all of these details are currently not considered stable.
30 // FIXME: Fill me in with more detail when the interface settles
31 //! This library is built on the assumption of a few existing symbols:
33 //! * `memcpy`, `memcmp`, `memset` - These are core memory routines which are
34 //! often generated by LLVM. Additionally, this library can make explicit
35 //! calls to these functions. Their signatures are the same as found in C.
36 //! These functions are often provided by the system libc, but can also be
37 //! provided by the [rlibc crate](https://crates.io/crates/rlibc).
39 //! * `rust_begin_panic` - This function takes four arguments, a
40 //! `fmt::Arguments`, a `&'static str`, and two `u32`'s. These four arguments
41 //! dictate the panic message, the file at which panic was invoked, and the
42 //! line and column inside the file. It is up to consumers of this core
43 //! library to define this panic function; it is only required to never
44 //! return. This requires a `lang` attribute named `panic_impl`.
46 //! * `rust_eh_personality` - is used by the failure mechanisms of the
47 //! compiler. This is often mapped to GCC's personality function, but crates
48 //! which do not trigger a panic can be assured that this function is never
49 //! called. The `lang` attribute is called `eh_personality`.
51 // Since libcore defines many fundamental lang items, all tests live in a
52 // separate crate, libcoretest, to avoid bizarre issues.
54 // Here we explicitly #[cfg]-out this whole crate when testing. If we don't do
55 // this, both the generated test artifact and the linked libtest (which
56 // transitively includes libcore) will both define the same set of lang items,
57 // and this will cause the E0152 "duplicate lang item found" error. See
58 // discussion in #50466 for details.
60 // This cfg won't affect doc tests.
63 #![stable(feature = "core", since = "1.6.0")]
64 #![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
65 html_favicon_url = "https://doc.rust-lang.org/favicon.ico",
66 html_root_url = "https://doc.rust-lang.org/nightly/",
67 html_playground_url = "https://play.rust-lang.org/",
68 issue_tracker_base_url = "https://github.com/rust-lang/rust/issues/",
69 test(no_crate_inject, attr(deny(warnings))),
70 test(attr(allow(dead_code, deprecated, unused_variables, unused_mut))))]
73 #![deny(missing_docs)]
74 #![deny(missing_debug_implementations)]
76 #![feature(allow_internal_unstable)]
77 #![feature(arbitrary_self_types)]
79 #![feature(associated_type_defaults)]
80 #![feature(cfg_target_has_atomic)]
81 #![feature(concat_idents)]
83 #![feature(const_int_ops)]
84 #![feature(const_fn_union)]
85 #![feature(const_manually_drop_new)]
86 #![feature(custom_attribute)]
88 #![feature(doc_spotlight)]
89 #![feature(extern_types)]
90 #![feature(fundamental)]
91 #![cfg_attr(stage0, feature(impl_header_lifetime_elision))]
92 #![feature(intrinsics)]
93 #![feature(lang_items)]
94 #![feature(link_llvm_intrinsics)]
95 #![feature(never_type)]
97 #![feature(exhaustive_patterns)]
98 #![feature(macro_at_most_once_rep)]
100 #![feature(on_unimplemented)]
101 #![feature(optin_builtin_traits)]
102 #![feature(prelude_import)]
103 #![feature(repr_simd, platform_intrinsics)]
104 #![feature(rustc_attrs)]
105 #![feature(rustc_const_unstable)]
106 #![feature(simd_ffi)]
107 #![feature(specialization)]
108 #![feature(staged_api)]
109 #![feature(stmt_expr_attributes)]
110 #![feature(unboxed_closures)]
111 #![feature(untagged_unions)]
112 #![feature(unwind_attributes)]
113 #![feature(doc_alias)]
114 #![feature(mmx_target_feature)]
115 #![feature(tbm_target_feature)]
116 #![feature(sse4a_target_feature)]
117 #![feature(arm_target_feature)]
118 #![feature(powerpc_target_feature)]
119 #![feature(mips_target_feature)]
120 #![feature(aarch64_target_feature)]
121 #![feature(wasm_target_feature)]
122 #![feature(const_slice_len)]
123 #![feature(const_str_as_bytes)]
124 #![feature(const_str_len)]
125 #![feature(const_let)]
126 #![feature(const_int_rotate)]
127 #![feature(const_int_wrapping)]
128 #![feature(const_int_sign)]
129 #![feature(const_int_conversion)]
130 #![feature(const_transmute)]
131 #![feature(reverse_bits)]
132 #![feature(non_exhaustive)]
144 #[path = "num/int_macros.rs"]
148 #[path = "num/uint_macros.rs"]
152 #[path = "num/isize.rs"] pub mod isize;
153 #[path = "num/i8.rs"] pub mod i8;
154 #[path = "num/i16.rs"] pub mod i16;
155 #[path = "num/i32.rs"] pub mod i32;
156 #[path = "num/i64.rs"] pub mod i64;
157 #[path = "num/i128.rs"] pub mod i128;
159 #[path = "num/usize.rs"] pub mod usize;
160 #[path = "num/u8.rs"] pub mod u8;
161 #[path = "num/u16.rs"] pub mod u16;
162 #[path = "num/u32.rs"] pub mod u32;
163 #[path = "num/u64.rs"] pub mod u64;
164 #[path = "num/u128.rs"] pub mod u128;
166 #[path = "num/f32.rs"] pub mod f32;
167 #[path = "num/f64.rs"] pub mod f64;
172 /* The libcore prelude, not as all-encompassing as the libstd prelude */
176 /* Core modules for ownership management */
183 /* Core language traits */
193 /* Core types and methods on primitives */
222 /* Heap memory allocator trait */
223 #[allow(missing_docs)]
226 // note: does not need to be public
232 // Pull in the the `coresimd` crate directly into libcore. This is where all the
233 // architecture-specific (and vendor-specific) intrinsics are defined. AKA
234 // things like SIMD and such. Note that the actual source for all this lies in a
235 // different repository, rust-lang-nursery/stdsimd. That's why the setup here is
237 #[allow(unused_macros)]
238 macro_rules! test_v16 { ($item:item) => {}; }
239 #[allow(unused_macros)]
240 macro_rules! test_v32 { ($item:item) => {}; }
241 #[allow(unused_macros)]
242 macro_rules! test_v64 { ($item:item) => {}; }
243 #[allow(unused_macros)]
244 macro_rules! test_v128 { ($item:item) => {}; }
245 #[allow(unused_macros)]
246 macro_rules! test_v256 { ($item:item) => {}; }
247 #[allow(unused_macros)]
248 macro_rules! test_v512 { ($item:item) => {}; }
249 #[allow(unused_macros)]
250 macro_rules! vector_impl { ($([$f:ident, $($args:tt)*]),*) => { $($f!($($args)*);)* } }
251 #[path = "../stdsimd/coresimd/mod.rs"]
252 #[allow(missing_docs, missing_debug_implementations, dead_code, unused_imports)]
253 #[unstable(feature = "stdsimd", issue = "48556")]
254 #[cfg(not(stage0))] // allow changes to how stdsimd works in stage0
257 #[stable(feature = "simd_arch", since = "1.27.0")]
259 pub use coresimd::arch;