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Rust 1.1.0

Released on June 25, 2015

What's Changed

  • The [str::split_whitespace] method splits a string on unicode
  • On both Windows and Unix, new extension traits provide conversion of
  • On Unix, [std::os::unix::symlink] creates symlinks. On
  • The mpsc::Receiver type can now be converted into an iterator with
  • Ipv4Addr can be created from u32 with the From
  • The Debug implementation for RangeFull [creates output that is
  • [Debug is implemented for File][file].
  • The Default implementation for Arc [no longer requires `Sync +
  • [The Iterator methods count, nth, and last have been
  • Incorrect handling of paths on Windows has been improved in both the
  • [AtomicPtr gained a Default implementation][ap].
  • In accordance with Rust's policy on arithmetic overflow abs now
  • The [Cloned] iterator, which was accidentally left unstable for
  • The [Incoming] iterator, which iterates over incoming TCP
  • [BinaryHeap] no longer corrupts itself [when functions called by
  • The [split_off] method of LinkedList [no longer corrupts

  • The [std::fs module has been expanded][fs] to expand the set of
  • DirEntry now supports optimizations like file_type and metadata which
  • A symlink_metadata function has been added.
  • The fs::Metadata structure now lowers to its OS counterpart, providing
  • The compiler now contains extended explanations of many errors. When an error
  • Thanks to multiple [improvements][sk] to [type checking][pre], as
  • Type checking performance [has improved notably][sk] with
  • The compiler [suggests code changes][ch] for more errors.
  • rustc and it's build system have experimental support for [building
  • The compiler defines the target_env cfg value, which is used for
  • The [cargo rustc][crc] command invokes a build with custom flags
  • [Android executables are always position independent][pie].
  • [The drop_with_repr_extern lint warns about mixing repr(C)
Full Changelog

* ~850 changes, numerous bugfixes

Highlights

----------

* The [std::fs module has been expanded][fs] to expand the set of

functionality exposed:

* DirEntry now supports optimizations like file_type and metadata which

don't incur a syscall on some platforms.

* A symlink_metadata function has been added.

* The fs::Metadata structure now lowers to its OS counterpart, providing

access to all underlying information.

* The compiler now contains extended explanations of many errors. When an error

with an explanation occurs the compiler suggests using the --explain flag

to read the explanation. Error explanations are also [available online][err-index].

* Thanks to multiple [improvements][sk] to [type checking][pre], as

well as other work, the time to bootstrap the compiler decreased by

32%.

Libraries

---------

* The [str::split_whitespace] method splits a string on unicode

whitespace boundaries.

* On both Windows and Unix, new extension traits provide conversion of

I/O types to and from the underlying system handles. On Unix, these

traits are [FromRawFd] and [AsRawFd], on Windows FromRawHandle

and AsRawHandle. These are implemented for File, TcpStream,

TcpListener, and UpdSocket. Further implementations for std::process will be stabilized later.

* On Unix, [std::os::unix::symlink] creates symlinks. On

Windows, symlinks can be created with

std::os::windows::symlink_dir and std::os::windows::symlink_file.

* The mpsc::Receiver type can now be converted into an iterator with

into_iter on the [IntoIterator] trait.

* Ipv4Addr can be created from u32 with the From

implementation of the [From] trait.

* The Debug implementation for RangeFull [creates output that is

more consistent with other implementations][rf].

* [Debug is implemented for File][file].

* The Default implementation for Arc [no longer requires Sync +

Send][arc].

* [The Iterator methods count, nth, and last have been

overridden for slices to have O(1) performance instead of O(n)][si].

* Incorrect handling of paths on Windows has been improved in both the

compiler and the standard library.

* [AtomicPtr gained a Default implementation][ap].

* In accordance with Rust's policy on arithmetic overflow abs now

[panics on overflow when debug assertions are enabled][abs].

* The [Cloned] iterator, which was accidentally left unstable for

1.0 [has been stabilized][c].

* The [Incoming] iterator, which iterates over incoming TCP

connections, and which was accidentally unnamable in 1.0, [is now

properly exported][inc].

* [BinaryHeap] no longer corrupts itself [when functions called by

sift_up or sift_down panic][bh].

* The [split_off] method of LinkedList [no longer corrupts

the list in certain scenarios][ll].

Misc

----

* Type checking performance [has improved notably][sk] with

[multiple improvements][pre].

* The compiler [suggests code changes][ch] for more errors.

* rustc and it's build system have experimental support for [building

toolchains against MUSL][m] instead of glibc on Linux.

* The compiler defines the target_env cfg value, which is used for

distinguishing toolchains that are otherwise for the same

platform. Presently this is set to gnu for common GNU Linux

targets and for MinGW targets, and musl for MUSL Linux targets.

* The [cargo rustc][crc] command invokes a build with custom flags

to rustc.

* [Android executables are always position independent][pie].

* [The drop_with_repr_extern lint warns about mixing repr(C)

with Drop][24935].

[str::split_whitespace]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_whitespace

[FromRawFd]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.FromRawFd.html

[AsRawFd]: https://doc.rust-lang.org/nightly/std/os/unix/io/trait.AsRawFd.html

[std::os::unix::symlink]: https://doc.rust-lang.org/nightly/std/os/unix/fs/fn.symlink.html

[IntoIterator]: https://doc.rust-lang.org/nightly/std/iter/trait.IntoIterator.html

[From]: https://doc.rust-lang.org/nightly/std/convert/trait.From.html

[rf]: https://github.com/rust-lang/rust/pull/24491

[err-index]: https://doc.rust-lang.org/error-index.html

[sk]: https://github.com/rust-lang/rust/pull/24615

[pre]: https://github.com/rust-lang/rust/pull/25323

[file]: https://github.com/rust-lang/rust/pull/24598

[ch]: https://github.com/rust-lang/rust/pull/24683

[arc]: https://github.com/rust-lang/rust/pull/24695

[si]: https://github.com/rust-lang/rust/pull/24701

[ap]: https://github.com/rust-lang/rust/pull/24834

[m]: https://github.com/rust-lang/rust/pull/24777

[fs]: https://github.com/rust-lang/rfcs/blob/master/text/1044-io-fs-2.1.md

[crc]: https://github.com/rust-lang/cargo/pull/1568

[pie]: https://github.com/rust-lang/rust/pull/24953

[abs]: https://github.com/rust-lang/rust/pull/25441

[c]: https://github.com/rust-lang/rust/pull/25496

[Cloned]: https://doc.rust-lang.org/nightly/std/iter/struct.Cloned.html

[Incoming]: https://doc.rust-lang.org/nightly/std/net/struct.Incoming.html

[inc]: https://github.com/rust-lang/rust/pull/25522

[bh]: https://github.com/rust-lang/rust/pull/25856

[BinaryHeap]: https://doc.rust-lang.org/nightly/std/collections/struct.BinaryHeap.html

[ll]: https://github.com/rust-lang/rust/pull/26022

[split_off]: https://doc.rust-lang.org/nightly/collections/linked_list/struct.LinkedList.html#method.split_off

[24935]: https://github.com/rust-lang/rust/pull/24935