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In preparation for the I/O rejuvination of the standard library, this commit
renames the current `io` module to `old_io` in order to make room for the new
I/O modules. It is expected that the I/O RFCs will land incrementally over time
instead of all at once, and this provides a fresh clean path for new modules to
enter into as well as guaranteeing that all old infrastructure will remain in
place for some time.
As each `old_io` module is replaced it will be deprecated in-place for new
structures in `std::{io, fs, net}` (as appropriate).
This commit does *not* leave a reexport of `old_io as io` as the deprecation
lint does not currently warn on this form of use. This is quite a large breaking
change for all imports in existing code, but all functionality is retained
precisely as-is and path statements simply need to be renamed from `io` to
`old_io`.
[breaking-change]
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I searched for times when we were hiding functions with # in the documentation,
and fixed them to not use it unless neccesary.
I also made random improvements whenever I changed something. For example,
I changed Example to Examples, for consistency.
Fixes #13423
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This gets rid of the 'experimental' level, removes the non-staged_api
case (i.e. stability levels for out-of-tree crates), and lets the
staged_api attributes use 'unstable' and 'deprecated' lints.
This makes the transition period to the full feature staging design
a bit nicer.
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This commit is an implementation of [RFC 494][rfc] which removes the entire
`std::c_vec` module and redesigns the `std::c_str` module as `std::ffi`.
[rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0494-c_str-and-c_vec-stability.md
The interface of the new `CString` is outlined in the linked RFC, the primary
changes being:
* The `ToCStr` trait is gone, meaning the `with_c_str` and `to_c_str` methods
are now gone. These two methods are replaced with a `CString::from_slice`
method.
* The `CString` type is now just a wrapper around `Vec<u8>` with a static
guarantee that there is a trailing nul byte with no internal nul bytes. This
means that `CString` now implements `Deref<Target = [c_char]>`, which is where
it gains most of its methods from. A few helper methods are added to acquire a
slice of `u8` instead of `c_char`, as well as including a slice with the
trailing nul byte if necessary.
* All usage of non-owned `CString` values is now done via two functions inside
of `std::ffi`, called `c_str_to_bytes` and `c_str_to_bytes_with_nul`. These
functions are now the one method used to convert a `*const c_char` to a Rust
slice of `u8`.
Many more details, including newly deprecated methods, can be found linked in
the RFC. This is a:
[breaking-change]
Closes #20444
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Conflicts:
src/doc/guide.md
src/libcollections/bit.rs
src/libcollections/btree/node.rs
src/libcollections/slice.rs
src/libcore/ops.rs
src/libcore/prelude.rs
src/librand/rand_impls.rs
src/librustc/middle/check_match.rs
src/librustc/middle/infer/region_inference/mod.rs
src/librustc_driver/lib.rs
src/librustdoc/test.rs
src/libstd/bitflags.rs
src/libstd/io/comm_adapters.rs
src/libstd/io/mem.rs
src/libstd/io/mod.rs
src/libstd/io/net/pipe.rs
src/libstd/io/net/tcp.rs
src/libstd/io/net/udp.rs
src/libstd/io/pipe.rs
src/libstd/io/process.rs
src/libstd/io/stdio.rs
src/libstd/io/timer.rs
src/libstd/io/util.rs
src/libstd/macros.rs
src/libstd/os.rs
src/libstd/path/posix.rs
src/libstd/path/windows.rs
src/libstd/prelude/v1.rs
src/libstd/rand/mod.rs
src/libstd/rand/os.rs
src/libstd/sync/barrier.rs
src/libstd/sync/condvar.rs
src/libstd/sync/future.rs
src/libstd/sync/mpsc/mod.rs
src/libstd/sync/mpsc/mpsc_queue.rs
src/libstd/sync/mpsc/select.rs
src/libstd/sync/mpsc/spsc_queue.rs
src/libstd/sync/mutex.rs
src/libstd/sync/once.rs
src/libstd/sync/rwlock.rs
src/libstd/sync/semaphore.rs
src/libstd/sync/task_pool.rs
src/libstd/sys/common/helper_thread.rs
src/libstd/sys/unix/process.rs
src/libstd/sys/unix/timer.rs
src/libstd/sys/windows/c.rs
src/libstd/sys/windows/timer.rs
src/libstd/sys/windows/tty.rs
src/libstd/thread.rs
src/libstd/thread_local/mod.rs
src/libstd/thread_local/scoped.rs
src/libtest/lib.rs
src/test/auxiliary/cci_capture_clause.rs
src/test/bench/shootout-reverse-complement.rs
src/test/bench/shootout-spectralnorm.rs
src/test/compile-fail/array-old-syntax-2.rs
src/test/compile-fail/bind-by-move-no-guards.rs
src/test/compile-fail/builtin-superkinds-self-type.rs
src/test/compile-fail/comm-not-freeze-receiver.rs
src/test/compile-fail/comm-not-freeze.rs
src/test/compile-fail/issue-12041.rs
src/test/compile-fail/unsendable-class.rs
src/test/run-pass/builtin-superkinds-capabilities-transitive.rs
src/test/run-pass/builtin-superkinds-capabilities-xc.rs
src/test/run-pass/builtin-superkinds-capabilities.rs
src/test/run-pass/builtin-superkinds-self-type.rs
src/test/run-pass/capturing-logging.rs
src/test/run-pass/closure-bounds-can-capture-chan.rs
src/test/run-pass/comm.rs
src/test/run-pass/core-run-destroy.rs
src/test/run-pass/drop-trait-enum.rs
src/test/run-pass/hashmap-memory.rs
src/test/run-pass/issue-13494.rs
src/test/run-pass/issue-3609.rs
src/test/run-pass/issue-4446.rs
src/test/run-pass/issue-4448.rs
src/test/run-pass/issue-8827.rs
src/test/run-pass/issue-9396.rs
src/test/run-pass/ivec-tag.rs
src/test/run-pass/rust-log-filter.rs
src/test/run-pass/send-resource.rs
src/test/run-pass/send-type-inference.rs
src/test/run-pass/sendable-class.rs
src/test/run-pass/spawn-types.rs
src/test/run-pass/task-comm-0.rs
src/test/run-pass/task-comm-10.rs
src/test/run-pass/task-comm-11.rs
src/test/run-pass/task-comm-13.rs
src/test/run-pass/task-comm-14.rs
src/test/run-pass/task-comm-15.rs
src/test/run-pass/task-comm-16.rs
src/test/run-pass/task-comm-3.rs
src/test/run-pass/task-comm-4.rs
src/test/run-pass/task-comm-5.rs
src/test/run-pass/task-comm-6.rs
src/test/run-pass/task-comm-7.rs
src/test/run-pass/task-comm-9.rs
src/test/run-pass/task-comm-chan-nil.rs
src/test/run-pass/task-spawn-move-and-copy.rs
src/test/run-pass/task-stderr.rs
src/test/run-pass/tcp-accept-stress.rs
src/test/run-pass/tcp-connect-timeouts.rs
src/test/run-pass/tempfile.rs
src/test/run-pass/trait-bounds-in-arc.rs
src/test/run-pass/trivial-message.rs
src/test/run-pass/unique-send-2.rs
src/test/run-pass/unique-send.rs
src/test/run-pass/unwind-resource.rs
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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 #20068
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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]
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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 #20068
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Sister pull request of https://github.com/rust-lang/rust/pull/19288, but
for the other style of block doc comment.
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This commit adds a `AsInner` trait to `sys_common` and provides
implementations on many `std::io` types. This is a building block for
exposing platform-specific APIs that hook into `std::io` types.
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This patch continues the runtime removal by moving pipe and
networking-related code into `sys`.
Because this eliminates APIs in `libnative` and `librustrt`, it is a:
[breaking-change]
This functionality is likely to be available publicly, in some form,
from `std` in the future.
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Conflicts:
src/libcollections/slice.rs
src/libcore/failure.rs
src/libsyntax/parse/token.rs
src/test/debuginfo/basic-types-mut-globals.rs
src/test/debuginfo/simple-struct.rs
src/test/debuginfo/trait-pointers.rs
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https://github.com/rust-lang/rfcs/pull/221
The current terminology of "task failure" often causes problems when
writing or speaking about code. You often want to talk about the
possibility of an operation that returns a Result "failing", but cannot
because of the ambiguity with task failure. Instead, you have to speak
of "the failing case" or "when the operation does not succeed" or other
circumlocutions.
Likewise, we use a "Failure" header in rustdoc to describe when
operations may fail the task, but it would often be helpful to separate
out a section describing the "Err-producing" case.
We have been steadily moving away from task failure and toward Result as
an error-handling mechanism, so we should optimize our terminology
accordingly: Result-producing functions should be easy to describe.
To update your code, rename any call to `fail!` to `panic!` instead.
Assuming you have not created your own macro named `panic!`, this
will work on UNIX based systems:
grep -lZR 'fail!' . | xargs -0 -l sed -i -e 's/fail!/panic!/g'
You can of course also do this by hand.
[breaking-change]
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This commit removes the `iotest!` macro from `std::io`. The macro was
primarily used to ensure that all io-related tests were run on both
libnative and libgreen/librustuv. However, now that the librustuv stack
is being removed, the macro is no longer needed.
See the [runtime removal
RFC](https://github.com/rust-lang/rfcs/pull/230) for more context.
[breaking-change]
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cc #17490
Reopening of #16230
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Replace `#[ignore(cfg(a, b))]` with `#[cfg_attr(all(a, b), ignore)]`
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Renamed as we may support pipes for other platforms.
Closes #12093
[breaking-change]
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