Rolling up PRs in the queue #20436
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Rolling up PRs in the queue #20436
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Mostly copy-editing, clarification---in particular, monomorphization
This commit is an implementation of [RFC 503][rfc] which is a stabilization story for the prelude. Most of the RFC was directly applied, removing reexports. Some reexports are kept around, however: * `range` remains until range syntax has landed to reduce churn. * `Path` and `GenericPath` remain until path reform lands. This is done to prevent many imports of `GenericPath` which will soon be removed. * All `io` traits remain until I/O reform lands so imports can be rewritten all at once to `std::io::prelude::*`. This is a breaking change because many prelude reexports have been removed, and the RFC can be consulted for the exact list of removed reexports, as well as to find the locations of where to import them. [rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0503-prelude-stabilization.md [breaking-change] Closes rust-lang#20068
Now that it's been removed from the prelude, we need to treat things differently. Fixes rust-lang#17967
This commit is a second pass stabilization for the `std::comm` module,
performing the following actions:
* The entire `std::comm` module was moved under `std::sync::mpsc`. This movement
reflects that channels are just yet another synchronization primitive, and
they don't necessarily deserve a special place outside of the other
concurrency primitives that the standard library offers.
* The `send` and `recv` methods have all been removed.
* The `send_opt` and `recv_opt` methods have been renamed to `send` and `recv`.
This means that all send/receive operations return a `Result` now indicating
whether the operation was successful or not.
* The error type of `send` is now a `SendError` to implement a custom error
message and allow for `unwrap()`. The error type contains an `into_inner`
method to extract the value.
* The error type of `recv` is now `RecvError` for the same reasons as `send`.
* The `TryRecvError` and `TrySendError` types have had public reexports removed
of their variants and the variant names have been tweaked with enum
namespacing rules.
* The `Messages` iterator is renamed to `Iter`
This functionality is now all `#[stable]`:
* `Sender`
* `SyncSender`
* `Receiver`
* `std::sync::mpsc`
* `channel`
* `sync_channel`
* `Iter`
* `Sender::send`
* `Sender::clone`
* `SyncSender::send`
* `SyncSender::try_send`
* `SyncSender::clone`
* `Receiver::recv`
* `Receiver::try_recv`
* `Receiver::iter`
* `SendError`
* `RecvError`
* `TrySendError::{mod, Full, Disconnected}`
* `TryRecvError::{mod, Empty, Disconnected}`
* `SendError::into_inner`
* `TrySendError::into_inner`
This is a breaking change due to the modification of where this module is
located, as well as the changing of the semantics of `send` and `recv`. Most
programs just need to rename imports of `std::comm` to `std::sync::mpsc` and
add calls to `unwrap` after a send or a receive operation.
[breaking-change]
There seems to be a problem introduced by 8b3c676 that causes "make install" to fail when the build is not configured to skip doc building.
This commit performs a second pass over the `std::thread_local` module. Most of the functionality remains explicitly unstable, but the specific actions taken were: * `thread_local` is now stable * `thread_local!` is now stable * `thread_local::Key` is now stable * `thread_local::Key::with` is now stable * `thread_local::Key::destroyed` is deprecated in favor of a more general `state` function * `thread_local::Key::state` was added to query the three states that a key can be in: uninitialized, valid, or destroyed. This function, and the corresponding `State` enum, are both marked unstable as we may wish to expand it later on. * `thread_local::scoped` is entirely unstable. There hasn't been a whole lot of usage of this module in the standard distribution, so it remains unstable at this time. Note that while the structure `Key` is marked stable, it is currently forced to expose all of its implementation details due to the use of construction-via-macro. The use of construction-via-macro is currently required in order to place the `#[thread_local]` attribute on static in a platform-specific manner. These stability attributes were assigned assuming that it will be acceptable to tweak the implementation of `Key` in the future.
As discovered in rust-lang#20376, the MSYS shell will silently rewrite arguemnts that look like unix paths into their windows path counterparts for compatibility, but the recently added `:kind` syntax added to the `-L` flag does not allow for this form of rewriting. This means that the syntax can be difficult to use at an MSYS prompt, as well as causing tests to fail when run manuall right now. This commit takes the other option presented in the original issue to prefix the path with `kind=` instead of suffixing it with `:kind`. For consistence, the `-l` flag is also now migrating to `kind=name`. This is a breaking change due to the *removal* of behavior with `-L`. All code using `:kind` should now pass `kind=` for `-L` arguments. This is not currently, but will become, a breaking change for `-l` flags. The old `name:kind` syntax is still accepted, but all code should update to `kind=name`. [breaking-change] Closes rust-lang#20376
Part of rust-lang#19253 [breaking-change]
…ds having to loop the slice from the begining.
Closes rust-lang#17732 Closes rust-lang#18819 Closes rust-lang#19479 Closes rust-lang#19631 Closes rust-lang#19632 Closes rust-lang#19850 Closes rust-lang#19883 Closes rust-lang#20005 Closes rust-lang#20009 Closes rust-lang#20389
The binaries for some release channels to not contain the version number, which makes it hard for scripts to determine the version number.
This pass performs a second pass of stabilization through the `std::sync`
module, avoiding modules/types that are being handled in other PRs (e.g.
mutexes, rwlocks, condvars, and channels).
The following items are now stable
* `sync::atomic`
* `sync::atomic::ATOMIC_BOOL_INIT` (was `INIT_ATOMIC_BOOL`)
* `sync::atomic::ATOMIC_INT_INIT` (was `INIT_ATOMIC_INT`)
* `sync::atomic::ATOMIC_UINT_INIT` (was `INIT_ATOMIC_UINT`)
* `sync::Once`
* `sync::ONCE_INIT`
* `sync::Once::call_once` (was `doit`)
* C == `pthread_once(..)`
* Boost == `call_once(..)`
* Windows == `InitOnceExecuteOnce`
* `sync::Barrier`
* `sync::Barrier::new`
* `sync::Barrier::wait` (now returns a `bool`)
* `sync::Semaphore::new`
* `sync::Semaphore::acquire`
* `sync::Semaphore::release`
The following items remain unstable
* `sync::SemaphoreGuard`
* `sync::Semaphore::access` - it's unclear how this relates to the poisoning
story of mutexes.
* `sync::TaskPool` - the semantics of a failing task and whether a thread is
re-attached to a thread pool are somewhat unclear, and the
utility of this type in `sync` is question with respect to
the jobs of other primitives. This type will likely become
stable or move out of the standard library over time.
* `sync::Future` - futures as-is have yet to be deeply re-evaluated with the
recent core changes to Rust's synchronization story, and will
likely become stable in the future but are unstable until
that time comes.
[breaking-change]
This commit is an implementation of [RFC 526][rfc] which is a change to alter the definition of the old `fmt::FormatWriter`. The new trait, renamed to `Writer`, now only exposes one method `write_str` in order to guarantee that all implementations of the formatting traits can only produce valid Unicode. [rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0526-fmt-text-writer.md One of the primary improvements of this patch is the performance of the `.to_string()` method by avoiding an almost-always redundant UTF-8 check. This is a breaking change due to the renaming of the trait as well as the loss of the `write` method, but migration paths should be relatively easy: * All usage of `write` should move to `write_str`. If truly binary data was being written in an implementation of `Show`, then it will need to use a different trait or an altogether different code path. * All usage of `write!` should continue to work as-is with no modifications. * All usage of `Show` where implementations just delegate to another should continue to work as-is. [breaking-change] Closes rust-lang#20352
This commit performs a second pass over the `std::boxed` module, taking the following actions: * `boxed` is now stable * `Box` is now stable * `BoxAny` is removed in favor of a direct `impl Box<Any>` * `Box::downcast` remains unstable while the name of the `downcast` family of methods is determined. This is a breaking change due to the removal of the `BoxAny` trait (note that the `downcast` method still exists), and existing consumers of `BoxAny` simply need to remove the import in their modules. [breaking-change]
… of rust-lang#19470 because of the backwards compatibility feature gate.) This is a [breaking-change]. The new rules require that, for an impl of a trait defined in some other crate, two conditions must hold: 1. Some type must be local. 2. Every type parameter must appear "under" some local type. Here are some examples that are legal: ```rust struct MyStruct<T> { ... } // Here `T` appears "under' `MyStruct`. impl<T> Clone for MyStruct<T> { } // Here `T` appears "under' `MyStruct` as well. Note that it also appears // elsewhere. impl<T> Iterator<T> for MyStruct<T> { } ``` Here is an illegal example: ```rust // Here `U` does not appear "under" `MyStruct` or any other local type. // We call `U` "uncovered". impl<T,U> Iterator<U> for MyStruct<T> { } ``` There are a couple of ways to rewrite this last example so that it is legal: 1. In some cases, the uncovered type parameter (here, `U`) should be converted into an associated type. This is however a non-local change that requires access to the original trait. Also, associated types are not fully baked. 2. Add `U` as a type parameter of `MyStruct`: ```rust struct MyStruct<T,U> { ... } impl<T,U> Iterator<U> for MyStruct<T,U> { } ``` 3. Create a newtype wrapper for `U` ```rust impl<T,U> Iterator<Wrapper<U>> for MyStruct<T,U> { } ``` Because associated types are not fully baked, which in the case of the `Hash` trait makes adhering to this rule impossible, you can temporarily disable this rule in your crate by using `#![feature(old_orphan_check)]`. Note that the `old_orphan_check` feature will be removed before 1.0 is released.
rules and cannot be updated until the libraries are synced, nor can they opt in to the old semantics.
various bugs in `trait_id_of_impl`. The end result was that looking up the "trait_id_of_impl" with a trait's def-id yielded the same trait again, even though it ought to have yielded None.
[breaking-change] `mod` is still accepted, but gives a deprecated warning
[breaking-change] `deriving is still accepted, but gives a deprecation warning
Closes rust-lang#17732 Closes rust-lang#18819 Closes rust-lang#19479 Closes rust-lang#19631 Closes rust-lang#19632 Closes rust-lang#19850 Closes rust-lang#19883 Closes rust-lang#20005 Closes rust-lang#20009 Closes rust-lang#20389 --- cc @nikomatsakis @sfackler
Conflicts: src/test/run-pass/issue-15734.rs src/test/run-pass/issue-3743.rs
This avoids having ast::Ty nodes which have no counterpart in the source.
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Conflicts: src/test/compile-fail/borrowck-loan-rcvr-overloaded-op.rs
Conflicts: src/librustc/middle/traits/mod.rs src/libstd/io/mod.rs src/test/run-pass/builtin-superkinds-self-type.rs
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Conflicts: src/liballoc/lib.rs src/libcollections/lib.rs src/libcollections/slice.rs src/libcore/ops.rs src/libcore/prelude.rs src/libcore/ptr.rs src/librustc/middle/traits/project.rs src/libstd/c_str.rs src/libstd/io/mem.rs src/libstd/io/mod.rs src/libstd/lib.rs src/libstd/path/posix.rs src/libstd/path/windows.rs src/libstd/prelude.rs src/libstd/rt/exclusive.rs src/libsyntax/lib.rs src/test/compile-fail/issue-18566.rs src/test/run-pass/deref-mut-on-ref.rs src/test/run-pass/deref-on-ref.rs src/test/run-pass/dst-deref-mut.rs src/test/run-pass/dst-deref.rs src/test/run-pass/fixup-deref-mut.rs src/test/run-pass/issue-13264.rs src/test/run-pass/overloaded-autoderef-indexing.rs
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