Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 426 insertions, 0 deletions

diff --git a/library/core/src/lib.rs b/library/core/src/lib.rs
new file mode 100644
index 000000000..24742bb49
--- /dev/null
+++ b/library/core/src/lib.rs
@@ -0,0 +1,426 @@
+//! # 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`, `strlen` - 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))]
+// To run libcore tests without x.py without ending up with two copies of libcore, Miri needs to be
+// able to "empty" this crate. See <https://github.com/rust-lang/miri-test-libstd/issues/4>.
+// rustc itself never sets the feature, so this line has no affect there.
+#![cfg(any(not(feature = "miri-test-libstd"), test, doctest))]
+#![stable(feature = "core", since = "1.6.0")]
+#![doc(
+    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)))
+)]
+#![doc(cfg_hide(
+    not(test),
+    any(not(feature = "miri-test-libstd"), test, doctest),
+    no_fp_fmt_parse,
+    target_pointer_width = "16",
+    target_pointer_width = "32",
+    target_pointer_width = "64",
+    target_has_atomic = "8",
+    target_has_atomic = "16",
+    target_has_atomic = "32",
+    target_has_atomic = "64",
+    target_has_atomic = "ptr",
+    target_has_atomic_equal_alignment = "8",
+    target_has_atomic_equal_alignment = "16",
+    target_has_atomic_equal_alignment = "32",
+    target_has_atomic_equal_alignment = "64",
+    target_has_atomic_equal_alignment = "ptr",
+    target_has_atomic_load_store = "8",
+    target_has_atomic_load_store = "16",
+    target_has_atomic_load_store = "32",
+    target_has_atomic_load_store = "64",
+    target_has_atomic_load_store = "ptr",
+))]
+#![no_core]
+#![rustc_coherence_is_core]
+//
+// Lints:
+#![deny(rust_2021_incompatible_or_patterns)]
+#![deny(unsafe_op_in_unsafe_fn)]
+#![warn(deprecated_in_future)]
+#![warn(missing_debug_implementations)]
+#![warn(missing_docs)]
+#![allow(explicit_outlives_requirements)]
+//
+// Library features:
+#![feature(const_align_offset)]
+#![feature(const_align_of_val)]
+#![feature(const_arguments_as_str)]
+#![feature(const_array_into_iter_constructors)]
+#![feature(const_bigint_helper_methods)]
+#![feature(const_black_box)]
+#![feature(const_caller_location)]
+#![feature(const_cell_into_inner)]
+#![feature(const_char_convert)]
+#![feature(const_clone)]
+#![feature(const_cmp)]
+#![feature(const_discriminant)]
+#![feature(const_eval_select)]
+#![feature(const_float_bits_conv)]
+#![feature(const_float_classify)]
+#![feature(const_fmt_arguments_new)]
+#![feature(const_heap)]
+#![feature(const_convert)]
+#![feature(const_inherent_unchecked_arith)]
+#![feature(const_int_unchecked_arith)]
+#![feature(const_intrinsic_forget)]
+#![feature(const_likely)]
+#![feature(const_maybe_uninit_uninit_array)]
+#![feature(const_maybe_uninit_as_mut_ptr)]
+#![feature(const_maybe_uninit_assume_init)]
+#![feature(const_nonnull_new)]
+#![feature(const_num_from_num)]
+#![feature(const_ops)]
+#![feature(const_option)]
+#![feature(const_option_ext)]
+#![feature(const_pin)]
+#![feature(const_ptr_sub_ptr)]
+#![feature(const_replace)]
+#![feature(const_ptr_as_ref)]
+#![feature(const_ptr_is_null)]
+#![feature(const_ptr_offset_from)]
+#![feature(const_ptr_read)]
+#![feature(const_ptr_write)]
+#![feature(const_raw_ptr_comparison)]
+#![feature(const_size_of_val)]
+#![feature(const_slice_from_raw_parts_mut)]
+#![feature(const_slice_ptr_len)]
+#![feature(const_str_from_utf8_unchecked_mut)]
+#![feature(const_swap)]
+#![feature(const_trait_impl)]
+#![feature(const_type_id)]
+#![feature(const_type_name)]
+#![feature(const_default_impls)]
+#![feature(const_unsafecell_get_mut)]
+#![feature(core_panic)]
+#![feature(duration_consts_float)]
+#![feature(maybe_uninit_uninit_array)]
+#![feature(ptr_metadata)]
+#![feature(slice_ptr_get)]
+#![feature(str_internals)]
+#![feature(utf16_extra)]
+#![feature(utf16_extra_const)]
+#![feature(variant_count)]
+#![feature(const_array_from_ref)]
+#![feature(const_slice_from_ref)]
+#![feature(const_slice_index)]
+#![feature(const_is_char_boundary)]
+//
+// Language features:
+#![feature(abi_unadjusted)]
+#![feature(allow_internal_unsafe)]
+#![feature(allow_internal_unstable)]
+#![feature(associated_type_bounds)]
+#![feature(auto_traits)]
+#![feature(cfg_sanitize)]
+#![feature(cfg_target_has_atomic)]
+#![feature(cfg_target_has_atomic_equal_alignment)]
+#![feature(const_fn_floating_point_arithmetic)]
+#![feature(const_mut_refs)]
+#![feature(const_precise_live_drops)]
+#![feature(const_refs_to_cell)]
+#![feature(decl_macro)]
+#![feature(deprecated_suggestion)]
+#![feature(doc_cfg)]
+#![feature(doc_notable_trait)]
+#![feature(rustdoc_internals)]
+#![feature(exhaustive_patterns)]
+#![feature(doc_cfg_hide)]
+#![feature(extern_types)]
+#![feature(fundamental)]
+#![feature(if_let_guard)]
+#![feature(intra_doc_pointers)]
+#![feature(intrinsics)]
+#![feature(lang_items)]
+#![feature(link_llvm_intrinsics)]
+#![feature(macro_metavar_expr)]
+#![feature(min_specialization)]
+#![feature(mixed_integer_ops)]
+#![feature(must_not_suspend)]
+#![feature(negative_impls)]
+#![feature(never_type)]
+#![feature(no_core)]
+#![feature(no_coverage)] // rust-lang/rust#84605
+#![feature(platform_intrinsics)]
+#![feature(prelude_import)]
+#![feature(repr_simd)]
+#![feature(rustc_allow_const_fn_unstable)]
+#![feature(rustc_attrs)]
+#![feature(simd_ffi)]
+#![feature(staged_api)]
+#![feature(stmt_expr_attributes)]
+#![feature(trait_alias)]
+#![feature(transparent_unions)]
+#![feature(try_blocks)]
+#![feature(unboxed_closures)]
+#![feature(unsized_fn_params)]
+#![feature(asm_const)]
+//
+// Target features:
+#![feature(arm_target_feature)]
+#![feature(avx512_target_feature)]
+#![feature(cmpxchg16b_target_feature)]
+#![feature(f16c_target_feature)]
+#![feature(hexagon_target_feature)]
+#![feature(mips_target_feature)]
+#![feature(powerpc_target_feature)]
+#![feature(rtm_target_feature)]
+#![feature(sse4a_target_feature)]
+#![feature(tbm_target_feature)]
+#![feature(wasm_target_feature)]
+
+// allow using `core::` in intra-doc links
+#[allow(unused_extern_crates)]
+extern crate self as core;
+
+#[prelude_import]
+#[allow(unused)]
+use prelude::v1::*;
+
+#[cfg(not(test))] // See #65860
+#[macro_use]
+mod macros;
+
+// We don't export this through #[macro_export] for now, to avoid breakage.
+// See https://github.com/rust-lang/rust/issues/82913
+#[cfg(not(test))]
+#[unstable(feature = "assert_matches", issue = "82775")]
+/// Unstable module containing the unstable `assert_matches` macro.
+pub mod assert_matches {
+    #[unstable(feature = "assert_matches", issue = "82775")]
+    pub use crate::macros::{assert_matches, debug_assert_matches};
+}
+
+#[macro_use]
+mod internal_macros;
+
+#[path = "num/shells/int_macros.rs"]
+#[macro_use]
+mod int_macros;
+
+#[path = "num/shells/i128.rs"]
+pub mod i128;
+#[path = "num/shells/i16.rs"]
+pub mod i16;
+#[path = "num/shells/i32.rs"]
+pub mod i32;
+#[path = "num/shells/i64.rs"]
+pub mod i64;
+#[path = "num/shells/i8.rs"]
+pub mod i8;
+#[path = "num/shells/isize.rs"]
+pub mod isize;
+
+#[path = "num/shells/u128.rs"]
+pub mod u128;
+#[path = "num/shells/u16.rs"]
+pub mod u16;
+#[path = "num/shells/u32.rs"]
+pub mod u32;
+#[path = "num/shells/u64.rs"]
+pub mod u64;
+#[path = "num/shells/u8.rs"]
+pub mod u8;
+#[path = "num/shells/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;
+pub mod clone;
+pub mod cmp;
+pub mod convert;
+pub mod default;
+pub mod marker;
+pub mod ops;
+
+/* Core types and methods on primitives */
+
+pub mod any;
+pub mod array;
+pub mod ascii;
+pub mod asserting;
+#[unstable(feature = "async_iterator", issue = "79024")]
+pub mod async_iter;
+pub mod cell;
+pub mod char;
+pub mod ffi;
+pub mod iter;
+#[unstable(feature = "once_cell", issue = "74465")]
+pub mod lazy;
+pub mod option;
+pub mod panic;
+pub mod panicking;
+pub mod pin;
+pub mod result;
+pub mod sync;
+
+pub mod fmt;
+pub mod hash;
+pub mod slice;
+pub mod str;
+pub mod time;
+
+pub mod unicode;
+
+/* Async */
+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
+)]
+#[allow(rustdoc::bare_urls)]
+// 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;
+
+#[doc = include_str!("../../stdarch/crates/core_arch/src/core_arch_docs.md")]
+#[stable(feature = "simd_arch", since = "1.27.0")]
+pub mod arch {
+    #[stable(feature = "simd_arch", since = "1.27.0")]
+    pub use crate::core_arch::arch::*;
+
+    /// Inline assembly.
+    ///
+    /// Refer to [rust by example] for a usage guide and the [reference] for
+    /// detailed information about the syntax and available options.
+    ///
+    /// [rust by example]: https://doc.rust-lang.org/nightly/rust-by-example/unsafe/asm.html
+    /// [reference]: https://doc.rust-lang.org/nightly/reference/inline-assembly.html
+    #[stable(feature = "asm", since = "1.59.0")]
+    #[rustc_builtin_macro]
+    pub macro asm("assembly template", $(operands,)* $(options($(option),*))?) {
+        /* compiler built-in */
+    }
+
+    /// Module-level inline assembly.
+    ///
+    /// Refer to [rust by example] for a usage guide and the [reference] for
+    /// detailed information about the syntax and available options.
+    ///
+    /// [rust by example]: https://doc.rust-lang.org/nightly/rust-by-example/unsafe/asm.html
+    /// [reference]: https://doc.rust-lang.org/nightly/reference/inline-assembly.html
+    #[stable(feature = "global_asm", since = "1.59.0")]
+    #[rustc_builtin_macro]
+    pub macro global_asm("assembly template", $(operands,)* $(options($(option),*))?) {
+        /* compiler built-in */
+    }
+}
+
+// Pull in the `core_simd` crate directly into libcore. The contents of
+// `core_simd` are in a different repository: rust-lang/portable-simd.
+//
+// `core_simd` 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 this crate as its libcore.
+#[path = "../../portable-simd/crates/core_simd/src/mod.rs"]
+#[allow(missing_debug_implementations, dead_code, unsafe_op_in_unsafe_fn, unused_unsafe)]
+#[allow(rustdoc::bare_urls)]
+#[unstable(feature = "portable_simd", issue = "86656")]
+mod core_simd;
+
+#[doc = include_str!("../../portable-simd/crates/core_simd/src/core_simd_docs.md")]
+#[unstable(feature = "portable_simd", issue = "86656")]
+pub mod simd {
+    #[unstable(feature = "portable_simd", issue = "86656")]
+    pub use crate::core_simd::simd::*;
+}
+
+include!("primitive_docs.rs");