1 files changed, 301 insertions, 0 deletions
diff --git a/library/core/src/lib.rs b/library/core/src/lib.rs
new file mode 100644
index 00000000000..e4b499a8022
--- /dev/null
+++ b/library/core/src/lib.rs
@@ -0,0 +1,301 @@
+//! # The Rust Core Library
+//!
+//! The Rust Core Library is the dependency-free[^free] foundation of [The
+//! Rust Standard Library](../std/index.html). It is the portable glue
+//! between the language and its libraries, defining the intrinsic and
+//! primitive building blocks of all Rust code. It links to no
+//! upstream libraries, no system libraries, and no libc.
+//!
+//! [^free]: Strictly speaking, there are some symbols which are needed but
+//!          they aren't always necessary.
+//!
+//! The core library is *minimal*: it isn't even aware of heap allocation,
+//! nor does it provide concurrency or I/O. These things require
+//! platform integration, and this library is platform-agnostic.
+//!
+//! # How to use the core library
+//!
+//! Please note that all of these details are currently not considered stable.
+//!
+// FIXME: Fill me in with more detail when the interface settles
+//! This library is built on the assumption of a few existing symbols:
+//!
+//! * `memcpy`, `memcmp`, `memset` - These are core memory routines which are
+//!   often generated by LLVM. Additionally, this library can make explicit
+//!   calls to these functions. Their signatures are the same as found in C.
+//!   These functions are often provided by the system libc, but can also be
+//!   provided by the [compiler-builtins crate](https://crates.io/crates/compiler_builtins).
+//!
+//! * `rust_begin_panic` - This function takes four arguments, a
+//!   `fmt::Arguments`, a `&'static str`, and two `u32`'s. These four arguments
+//!   dictate the panic message, the file at which panic was invoked, and the
+//!   line and column inside the file. It is up to consumers of this core
+//!   library to define this panic function; it is only required to never
+//!   return. This requires a `lang` attribute named `panic_impl`.
+//!
+//! * `rust_eh_personality` - is used by the failure mechanisms of the
+//!    compiler. This is often mapped to GCC's personality function, but crates
+//!    which do not trigger a panic can be assured that this function is never
+//!    called. The `lang` attribute is called `eh_personality`.
+
+// Since libcore defines many fundamental lang items, all tests live in a
+// separate crate, libcoretest, to avoid bizarre issues.
+//
+// Here we explicitly #[cfg]-out this whole crate when testing. If we don't do
+// this, both the generated test artifact and the linked libtest (which
+// transitively includes libcore) will both define the same set of lang items,
+// and this will cause the E0152 "found duplicate lang item" error. See
+// discussion in #50466 for details.
+//
+// This cfg won't affect doc tests.
+#![cfg(not(test))]
+#![stable(feature = "core", since = "1.6.0")]
+#![doc(
+    html_root_url = "https://doc.rust-lang.org/nightly/",
+    html_playground_url = "https://play.rust-lang.org/",
+    issue_tracker_base_url = "https://github.com/rust-lang/rust/issues/",
+    test(no_crate_inject, attr(deny(warnings))),
+    test(attr(allow(dead_code, deprecated, unused_variables, unused_mut)))
+)]
+#![no_core]
+#![warn(deprecated_in_future)]
+#![warn(missing_docs)]
+#![warn(missing_debug_implementations)]
+#![deny(intra_doc_link_resolution_failure)] // rustdoc is run without -D warnings
+#![allow(explicit_outlives_requirements)]
+#![allow(incomplete_features)]
+#![feature(allow_internal_unstable)]
+#![feature(arbitrary_self_types)]
+#![feature(asm)]
+#![feature(bound_cloned)]
+#![feature(cfg_target_has_atomic)]
+#![feature(concat_idents)]
+#![feature(const_alloc_layout)]
+#![feature(const_discriminant)]
+#![feature(const_checked_int_methods)]
+#![feature(const_euclidean_int_methods)]
+#![feature(const_overflowing_int_methods)]
+#![feature(const_int_unchecked_arith)]
+#![feature(const_int_pow)]
+#![feature(constctlz)]
+#![feature(const_panic)]
+#![feature(const_fn_union)]
+#![feature(const_generics)]
+#![feature(const_option)]
+#![feature(const_ptr_offset)]
+#![feature(const_ptr_offset_from)]
+#![feature(const_raw_ptr_comparison)]
+#![feature(const_result)]
+#![feature(const_slice_from_raw_parts)]
+#![feature(const_slice_ptr_len)]
+#![feature(const_type_name)]
+#![feature(const_likely)]
+#![feature(const_unreachable_unchecked)]
+#![feature(custom_inner_attributes)]
+#![feature(decl_macro)]
+#![feature(doc_cfg)]
+#![cfg_attr(not(bootstrap), feature(doc_spotlight))]
+#![feature(duration_consts_2)]
+#![feature(extern_types)]
+#![feature(fundamental)]
+#![feature(intrinsics)]
+#![feature(try_find)]
+#![feature(is_sorted)]
+#![feature(lang_items)]
+#![feature(link_llvm_intrinsics)]
+#![feature(llvm_asm)]
+#![feature(negative_impls)]
+#![feature(never_type)]
+#![feature(nll)]
+#![feature(exhaustive_patterns)]
+#![feature(no_core)]
+#![feature(optin_builtin_traits)]
+#![feature(or_patterns)]
+#![feature(prelude_import)]
+#![feature(repr_simd, platform_intrinsics)]
+#![feature(rustc_attrs)]
+#![feature(simd_ffi)]
+#![feature(specialization)]
+#![feature(staged_api)]
+#![feature(std_internals)]
+#![feature(stmt_expr_attributes)]
+#![feature(transparent_unions)]
+#![feature(unboxed_closures)]
+#![feature(unsized_locals)]
+#![feature(untagged_unions)]
+#![feature(unwind_attributes)]
+#![feature(variant_count)]
+#![feature(doc_alias)]
+#![feature(mmx_target_feature)]
+#![feature(tbm_target_feature)]
+#![feature(sse4a_target_feature)]
+#![feature(arm_target_feature)]
+#![feature(powerpc_target_feature)]
+#![feature(mips_target_feature)]
+#![feature(aarch64_target_feature)]
+#![feature(wasm_target_feature)]
+#![feature(avx512_target_feature)]
+#![feature(cmpxchg16b_target_feature)]
+#![feature(rtm_target_feature)]
+#![feature(f16c_target_feature)]
+#![feature(hexagon_target_feature)]
+#![feature(const_fn_transmute)]
+#![feature(abi_unadjusted)]
+#![feature(adx_target_feature)]
+#![feature(maybe_uninit_slice)]
+#![feature(external_doc)]
+#![feature(associated_type_bounds)]
+#![feature(const_type_id)]
+#![feature(const_caller_location)]
+#![feature(slice_ptr_get)]
+#![feature(no_niche)] // rust-lang/rust#68303
+#![feature(unsafe_block_in_unsafe_fn)]
+#![deny(intra_doc_link_resolution_failure)]
+#![deny(unsafe_op_in_unsafe_fn)]
+
+#[prelude_import]
+#[allow(unused)]
+use prelude::v1::*;
+
+#[cfg(not(test))] // See #65860
+#[macro_use]
+mod macros;
+
+#[macro_use]
+mod internal_macros;
+
+#[path = "num/int_macros.rs"]
+#[macro_use]
+mod int_macros;
+
+#[path = "num/i128.rs"]
+pub mod i128;
+#[path = "num/i16.rs"]
+pub mod i16;
+#[path = "num/i32.rs"]
+pub mod i32;
+#[path = "num/i64.rs"]
+pub mod i64;
+#[path = "num/i8.rs"]
+pub mod i8;
+#[path = "num/isize.rs"]
+pub mod isize;
+
+#[path = "num/u128.rs"]
+pub mod u128;
+#[path = "num/u16.rs"]
+pub mod u16;
+#[path = "num/u32.rs"]
+pub mod u32;
+#[path = "num/u64.rs"]
+pub mod u64;
+#[path = "num/u8.rs"]
+pub mod u8;
+#[path = "num/usize.rs"]
+pub mod usize;
+
+#[path = "num/f32.rs"]
+pub mod f32;
+#[path = "num/f64.rs"]
+pub mod f64;
+
+#[macro_use]
+pub mod num;
+
+/* The libcore prelude, not as all-encompassing as the libstd prelude */
+
+pub mod prelude;
+
+/* Core modules for ownership management */
+
+pub mod hint;
+pub mod intrinsics;
+pub mod mem;
+pub mod ptr;
+
+/* Core language traits */
+
+pub mod borrow;
+#[cfg(not(test))] // See #65860
+pub mod clone;
+#[cfg(not(test))] // See #65860
+pub mod cmp;
+pub mod convert;
+#[cfg(not(test))] // See #65860
+pub mod default;
+#[cfg(not(test))] // See #65860
+pub mod marker;
+pub mod ops;
+
+/* Core types and methods on primitives */
+
+pub mod any;
+#[cfg(not(test))] // See #65860
+pub mod array;
+pub mod ascii;
+pub mod cell;
+pub mod char;
+pub mod ffi;
+#[cfg(not(test))] // See #65860
+pub mod iter;
+#[unstable(feature = "once_cell", issue = "74465")]
+pub mod lazy;
+pub mod option;
+pub mod panic;
+pub mod panicking;
+#[cfg(not(test))] // See #65860
+pub mod pin;
+pub mod raw;
+pub mod result;
+pub mod sync;
+
+#[cfg(not(test))] // See #65860
+pub mod fmt;
+#[cfg(not(test))] // See #65860
+pub mod hash;
+pub mod slice;
+#[cfg(not(test))] // See #65860
+pub mod str;
+pub mod time;
+
+pub mod unicode;
+
+/* Async */
+#[cfg(not(test))] // See #65860
+pub mod future;
+pub mod task;
+
+/* Heap memory allocator trait */
+#[allow(missing_docs)]
+pub mod alloc;
+
+// note: does not need to be public
+mod bool;
+mod tuple;
+mod unit;
+
+#[stable(feature = "core_primitive", since = "1.43.0")]
+pub mod primitive;
+
+// Pull in the `core_arch` crate directly into libcore. The contents of
+// `core_arch` are in a different repository: rust-lang/stdarch.
+//
+// `core_arch` depends on libcore, but the contents of this module are
+// set up in such a way that directly pulling it here works such that the
+// crate uses the this crate as its libcore.
+#[path = "../../stdarch/crates/core_arch/src/mod.rs"]
+#[allow(
+    missing_docs,
+    missing_debug_implementations,
+    dead_code,
+    unused_imports,
+    unsafe_op_in_unsafe_fn
+)]
+// FIXME: This annotation should be moved into rust-lang/stdarch after clashing_extern_declarations is
+// merged. It currently cannot because bootstrap fails as the lint hasn't been defined yet.
+#[allow(clashing_extern_declarations)]
+#[unstable(feature = "stdsimd", issue = "48556")]
+mod core_arch;
+
+#[stable(feature = "simd_arch", since = "1.27.0")]
+pub use core_arch::arch;