7411a9e7cc
## User-facing changes - Intra-doc links to primitives that currently go to rust-lang.org/nightly/std/primitive.x.html will start going to channel that rustdoc was built with. Nightly will continue going to /nightly; Beta will link to /beta; stable compilers will link to /1.52.1 (or whatever version they were built as). - Cross-crate links from std to core currently go to /nightly unconditionally. They will start going to /1.52.0 on stable channels (but remain the same on nightly channels). - Intra-crate links from std to std (or core to core) currently go to the same URL they are hosted at; they will continue to do so. Notably, this is different from everything else because it can preserve the distinction between /stable and /1.52.0 by using relative links. Note that "links" includes both intra-doc links and rustdoc's own automatically generated hyperlinks. ## Implementation changes - Update the testsuite to allow linking to /beta and /1.52.1 in docs - Use an html_root_url for the standard library that's dependent on the channel This avoids linking to nightly docs on stable. - Update rustdoc to use channel-dependent links for primitives from an unknown crate - Set DOC_RUST_LANG_ORG_CHANNEL from bootstrap to ensure it's in sync - Include doc.rust-lang.org in the channel
195 lines
6.4 KiB
Rust
195 lines
6.4 KiB
Rust
//! # The Rust core allocation and collections library
|
||
//!
|
||
//! This library provides smart pointers and collections for managing
|
||
//! heap-allocated values.
|
||
//!
|
||
//! This library, like libcore, normally doesn’t need to be used directly
|
||
//! since its contents are re-exported in the [`std` crate](../std/index.html).
|
||
//! Crates that use the `#![no_std]` attribute however will typically
|
||
//! not depend on `std`, so they’d use this crate instead.
|
||
//!
|
||
//! ## Boxed values
|
||
//!
|
||
//! The [`Box`] type is a smart pointer type. There can only be one owner of a
|
||
//! [`Box`], and the owner can decide to mutate the contents, which live on the
|
||
//! heap.
|
||
//!
|
||
//! This type can be sent among threads efficiently as the size of a `Box` value
|
||
//! is the same as that of a pointer. Tree-like data structures are often built
|
||
//! with boxes because each node often has only one owner, the parent.
|
||
//!
|
||
//! ## Reference counted pointers
|
||
//!
|
||
//! The [`Rc`] type is a non-threadsafe reference-counted pointer type intended
|
||
//! for sharing memory within a thread. An [`Rc`] pointer wraps a type, `T`, and
|
||
//! only allows access to `&T`, a shared reference.
|
||
//!
|
||
//! This type is useful when inherited mutability (such as using [`Box`]) is too
|
||
//! constraining for an application, and is often paired with the [`Cell`] or
|
||
//! [`RefCell`] types in order to allow mutation.
|
||
//!
|
||
//! ## Atomically reference counted pointers
|
||
//!
|
||
//! The [`Arc`] type is the threadsafe equivalent of the [`Rc`] type. It
|
||
//! provides all the same functionality of [`Rc`], except it requires that the
|
||
//! contained type `T` is shareable. Additionally, [`Arc<T>`][`Arc`] is itself
|
||
//! sendable while [`Rc<T>`][`Rc`] is not.
|
||
//!
|
||
//! This type allows for shared access to the contained data, and is often
|
||
//! paired with synchronization primitives such as mutexes to allow mutation of
|
||
//! shared resources.
|
||
//!
|
||
//! ## Collections
|
||
//!
|
||
//! Implementations of the most common general purpose data structures are
|
||
//! defined in this library. They are re-exported through the
|
||
//! [standard collections library](../std/collections/index.html).
|
||
//!
|
||
//! ## Heap interfaces
|
||
//!
|
||
//! The [`alloc`](alloc/index.html) module defines the low-level interface to the
|
||
//! default global allocator. It is not compatible with the libc allocator API.
|
||
//!
|
||
//! [`Arc`]: sync
|
||
//! [`Box`]: boxed
|
||
//! [`Cell`]: core::cell
|
||
//! [`Rc`]: rc
|
||
//! [`RefCell`]: core::cell
|
||
|
||
#![allow(unused_attributes)]
|
||
#![stable(feature = "alloc", since = "1.36.0")]
|
||
#![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(allow(unused_variables), deny(warnings)))
|
||
)]
|
||
#![no_std]
|
||
#![needs_allocator]
|
||
#![warn(deprecated_in_future)]
|
||
#![warn(missing_docs)]
|
||
#![warn(missing_debug_implementations)]
|
||
#![allow(explicit_outlives_requirements)]
|
||
#![deny(unsafe_op_in_unsafe_fn)]
|
||
#![feature(rustc_allow_const_fn_unstable)]
|
||
#![cfg_attr(not(test), feature(generator_trait))]
|
||
#![cfg_attr(test, feature(test))]
|
||
#![cfg_attr(test, feature(new_uninit))]
|
||
#![feature(allocator_api)]
|
||
#![feature(array_chunks)]
|
||
#![feature(array_methods)]
|
||
#![feature(array_windows)]
|
||
#![feature(allow_internal_unstable)]
|
||
#![feature(arbitrary_self_types)]
|
||
#![feature(async_stream)]
|
||
#![feature(box_patterns)]
|
||
#![feature(box_syntax)]
|
||
#![feature(cfg_sanitize)]
|
||
#![feature(cfg_target_has_atomic)]
|
||
#![feature(coerce_unsized)]
|
||
#![cfg_attr(not(no_global_oom_handling), feature(const_btree_new))]
|
||
#![feature(const_fn_trait_bound)]
|
||
#![feature(cow_is_borrowed)]
|
||
#![feature(const_cow_is_borrowed)]
|
||
#![feature(destructuring_assignment)]
|
||
#![feature(dispatch_from_dyn)]
|
||
#![feature(core_intrinsics)]
|
||
#![feature(dropck_eyepatch)]
|
||
#![feature(exact_size_is_empty)]
|
||
#![feature(exclusive_range_pattern)]
|
||
#![feature(extend_one)]
|
||
#![feature(fmt_internals)]
|
||
#![feature(fn_traits)]
|
||
#![feature(fundamental)]
|
||
#![feature(inplace_iteration)]
|
||
// Technically, this is a bug in rustdoc: rustdoc sees the documentation on `#[lang = slice_alloc]`
|
||
// blocks is for `&[T]`, which also has documentation using this feature in `core`, and gets mad
|
||
// that the feature-gate isn't enabled. Ideally, it wouldn't check for the feature gate for docs
|
||
// from other crates, but since this can only appear for lang items, it doesn't seem worth fixing.
|
||
#![feature(intra_doc_pointers)]
|
||
#![feature(iter_zip)]
|
||
#![feature(lang_items)]
|
||
#![feature(layout_for_ptr)]
|
||
#![feature(maybe_uninit_ref)]
|
||
#![feature(negative_impls)]
|
||
#![feature(never_type)]
|
||
#![feature(nll)]
|
||
#![feature(nonnull_slice_from_raw_parts)]
|
||
#![feature(auto_traits)]
|
||
#![feature(option_result_unwrap_unchecked)]
|
||
#![feature(pattern)]
|
||
#![feature(ptr_internals)]
|
||
#![feature(rustc_attrs)]
|
||
#![feature(receiver_trait)]
|
||
#![feature(min_specialization)]
|
||
#![feature(set_ptr_value)]
|
||
#![feature(slice_ptr_get)]
|
||
#![feature(slice_ptr_len)]
|
||
#![feature(slice_range)]
|
||
#![feature(staged_api)]
|
||
#![feature(str_internals)]
|
||
#![feature(trusted_len)]
|
||
#![feature(unboxed_closures)]
|
||
#![feature(unicode_internals)]
|
||
#![feature(unsize)]
|
||
#![feature(unsized_fn_params)]
|
||
#![feature(allocator_internals)]
|
||
#![feature(slice_partition_dedup)]
|
||
#![feature(maybe_uninit_extra, maybe_uninit_slice, maybe_uninit_uninit_array)]
|
||
#![feature(alloc_layout_extra)]
|
||
#![feature(trusted_random_access)]
|
||
#![cfg_attr(bootstrap, feature(try_trait))]
|
||
#![cfg_attr(not(bootstrap), feature(try_trait_v2))]
|
||
#![feature(min_type_alias_impl_trait)]
|
||
#![feature(associated_type_bounds)]
|
||
#![feature(slice_group_by)]
|
||
#![feature(decl_macro)]
|
||
#![feature(bindings_after_at)]
|
||
// Allow testing this library
|
||
|
||
#[cfg(test)]
|
||
#[macro_use]
|
||
extern crate std;
|
||
#[cfg(test)]
|
||
extern crate test;
|
||
|
||
// Module with internal macros used by other modules (needs to be included before other modules).
|
||
#[macro_use]
|
||
mod macros;
|
||
|
||
// Heaps provided for low-level allocation strategies
|
||
|
||
pub mod alloc;
|
||
|
||
// Primitive types using the heaps above
|
||
|
||
// Need to conditionally define the mod from `boxed.rs` to avoid
|
||
// duplicating the lang-items when building in test cfg; but also need
|
||
// to allow code to have `use boxed::Box;` declarations.
|
||
#[cfg(not(test))]
|
||
pub mod boxed;
|
||
#[cfg(test)]
|
||
mod boxed {
|
||
pub use std::boxed::Box;
|
||
}
|
||
pub mod borrow;
|
||
pub mod collections;
|
||
pub mod fmt;
|
||
pub mod prelude;
|
||
pub mod raw_vec;
|
||
pub mod rc;
|
||
pub mod slice;
|
||
pub mod str;
|
||
pub mod string;
|
||
#[cfg(target_has_atomic = "ptr")]
|
||
pub mod sync;
|
||
#[cfg(all(not(no_global_oom_handling), target_has_atomic = "ptr"))]
|
||
pub mod task;
|
||
#[cfg(test)]
|
||
mod tests;
|
||
pub mod vec;
|
||
|
||
#[doc(hidden)]
|
||
#[unstable(feature = "liballoc_internals", issue = "none", reason = "implementation detail")]
|
||
pub mod __export {
|
||
pub use core::format_args;
|
||
}
|