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Update release notes for 1.7
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Brian Anderson
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RELEASES.md
209
RELEASES.md
@ -1,3 +1,200 @@
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Version 1.7.0 (2016-03-03)
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==========================
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Language
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--------
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* Soundness fixes to the interactions between associated types and
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lifetimes, specified in [RFC 1214], [now generate errors][1.7sf] for
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code that violates the new rules. This is a significant change that
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is known to break existing code, so it has emitted warnings for the
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new error cases since 1.4 to give crate authors time to adapt. The
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details of what is changing are subtle; read the RFC for more.
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Libraries
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---------
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* Stabilized APIs:
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[`Path::strip_prefix`][] (renamed from relative_from),
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[`path::StripPrefixError`][] (new error type returned from strip_prefix),
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[`Ipv4Addr::is_loopback`],
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[`Ipv4Addr::is_private`],
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[`Ipv4Addr::is_link_local`],
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[`Ipv4Addr::is_multicast`],
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[`Ipv4Addr::is_broadcast`],
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[`Ipv4Addr::is_documentation`],
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[`Ipv6Addr::is_unspecified`],
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[`Ipv6Addr::is_loopback`],
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[`Ipv6Addr::is_multicast`],
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[`Vec::as_slice`],
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[`Vec::as_mut_slice`],
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[`String::as_str`],
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[`String::as_mut_str`],
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`<[T]>::`[`clone_from_slice`], which now requires the two slices to
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be the same length
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`<[T]>::`[`sort_by_key`],
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[`i32::checked_rem`],
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[`i32::checked_neg`],
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[`i32::checked_shl`],
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[`i32::checked_shr`],
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[`i32::saturating_mul`],
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[`i32::overflowing_add`],
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[`i32::overflowing_sub`],
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[`i32::overflowing_mul`],
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[`i32::overflowing_div`],
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[`i32::overflowing_rem`],
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[`i32::overflowing_neg`],
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[`i32::overflowing_shl`],
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[`i32::overflowing_shr`],
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[`u32::checked_rem`],
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[`u32::checked_neg`],
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[`u32::checked_shl`],
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[`u32::checked_shl`],
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[`u32::saturating_mul`],
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[`u32::overflowing_add`],
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[`u32::overflowing_sub`],
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[`u32::overflowing_mul`],
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[`u32::overflowing_div`],
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[`u32::overflowing_rem`],
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[`u32::overflowing_neg`],
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[`u32::overflowing_shl`],
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[`u32::overflowing_shr`],
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checked, saturated, and overflowing operations for other primitive types,
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[`ffi::IntoStringError`],
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[`CString::into_string`],
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[`CString::into_bytes`],
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[`CString::into_bytes_with_nul`],
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`From<CString> for Vec<u8>`,
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[`IntoStringError::into_cstring`],
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[`IntoStringError::utf8_error`],
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`Error for IntoStringError`.
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* [Validating UTF-8 is faster by a factor of between 7 and 14x for
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ASCII input][1.7utf8]. This means that creating `String`s and `str`s
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from bytes is faster.
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* [The performance of `LineWriter` (and thus `io::stdout`) was
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improved by using `memchr` to search for newlines][1.7m].
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* [`f32::to_degrees` and `f32::to_radians` are stable][1.7f]. The
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`f64` variants were stabilized previously.
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* [`BTreeMap` was rewritten to use less memory improve performance of
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insertion and iteration, the latter by as much as 5x`][1.7bm].
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* [`BTreeSet` and its iterators, `Iter`, `IntoIter`, and `Range` are
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covariant over their contained type][1.7bt].
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* [`LinkedList` and its iterators, `Iter` and `IntoIter` are covariant
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over their contained type][1.7ll].
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* [`str::replace` now accepts a `Pattern`][1.7rp], like other string
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searching methods.
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* [`Any` is implemented for unsized types][1.7a].
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* [`Hash` is implemented for `Duration`][1.7h].
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Misc
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----
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* [The `--error-format=json` flag to `rustc` causes it to emit errors
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in JSON format][1.7j]. This is an unstable flag and so also requires
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the `-Z unstable-options` flag.
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* [When running tests with `--test`, rustdoc will pass `--cfg`
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arguments to the compiler][1.7dt].
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* [The compiler is built with RPATH information by default][1.7rp].
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This means that it will be possible to run `rustc` when installed in
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unusual configurations without configuring the dynamic linker search
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path explicitly.
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* [`rustc` passes `--enable-new-dtags` to GNU ld][1.7dt]. This makes
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any RPATH entries (emitted with `-C rpath`) *not* take precedence
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over `LD_LIBRARY_PATH`.
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Cargo
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-----
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* [`cargo rustc` accepts a `--profile` flag that runs `rustc` under
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any of the compilation profiles, 'dev', 'bench', or 'test'][1.7cp].
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* [The `rerun-if-changed` build script directive no longer causes the
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build script to incorrectly run twice in certain scenarios][1.7rr].
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Compatibility Notes
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-------------------
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* [Several bugs in the compiler's visibility calculations were
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fixed][1.7v]. Since this was found to break significant amounts of
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code, the new errors will be emitted as warnings for several release
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cycles, under the `private_in_public` lint.
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* Defaulted type parameters were accidentally accepted in positions
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that were not intended. In this release, [defaulted type parameters
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appearing outside of type definitions will generate a
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warning][1.7d], which will become an error in future releases.
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* [Parsing "." as a float results in an error instead of
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0][1.7p]. That is, `".".parse::<f32>()` returns `Err`, not `Ok(0)`.
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* [Borrows of closure parameters may not outlive the closure][1.7bc].
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[1.7a]: https://github.com/rust-lang/rust/pull/30928
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[1.7bc]: https://github.com/rust-lang/rust/pull/30341
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[1.7bm]: https://github.com/rust-lang/rust/pull/30426
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[1.7bt]: https://github.com/rust-lang/rust/pull/30998
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[1.7cp]: https://github.com/rust-lang/cargo/pull/2224
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[1.7d]: https://github.com/rust-lang/rust/pull/30724
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[1.7dt]: https://github.com/rust-lang/rust/pull/30372
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[1.7dt]: https://github.com/rust-lang/rust/pull/30394
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[1.7f]: https://github.com/rust-lang/rust/pull/30672
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[1.7h]: https://github.com/rust-lang/rust/pull/30818
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[1.7j]: https://github.com/rust-lang/rust/pull/30711
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[1.7ll]: https://github.com/rust-lang/rust/pull/30663
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[1.7m]: https://github.com/rust-lang/rust/pull/30381
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[1.7p]: https://github.com/rust-lang/rust/pull/30681
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[1.7rp]: https://github.com/rust-lang/rust/pull/29498
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[1.7rp]: https://github.com/rust-lang/rust/pull/30353
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[1.7rr]: https://github.com/rust-lang/cargo/pull/2279
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[1.7sf]: https://github.com/rust-lang/rust/pull/30389
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[1.7utf8]: https://github.com/rust-lang/rust/pull/30740
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[1.7v]: https://github.com/rust-lang/rust/pull/29973
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[RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md
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[`clone_from_slice`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.clone_from_slice
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[`sort_by_key`]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.sort_by_key
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[`CString::into_bytes_with_nul`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes_with_nul
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[`CString::into_bytes`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes
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[`CString::into_string`]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_string
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[`IntoStringError::into_cstring`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.into_cstring
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[`IntoStringError::utf8_error`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.utf8_error
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[`Ipv4Addr::is_broadcast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_broadcast
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[`Ipv4Addr::is_documentation`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_documentation
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[`Ipv4Addr::is_link_local`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_link_local
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[`Ipv4Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_loopback
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[`Ipv4Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_multicast
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[`Ipv4Addr::is_private`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_private
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[`Ipv6Addr::is_loopback`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_loopback
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[`Ipv6Addr::is_multicast`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_multicast
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[`Ipv6Addr::is_unspecified`]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_unspecified
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[`Path::strip_prefix`]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.strip_prefix
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[`String::as_mut_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_mut_str
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[`String::as_str`]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_str
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[`Vec::as_mut_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_mut_slice
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[`Vec::as_slice`]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_slice
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[`ffi::IntoStringError`]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html
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[`i32::checked_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_neg
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[`i32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_rem
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[`i32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shl
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[`i32::checked_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shr
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[`i32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_add
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[`i32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_div
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[`i32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_mul
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[`i32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_neg
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[`i32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_rem
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[`i32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shl
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[`i32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shr
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[`i32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_sub
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[`i32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.saturating_mul
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[`path::StripPrefixError`]: http://doc.rust-lang.org/nightly/std/path/struct.StripPrefixError.html
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[`u32::checked_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_rem
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[`u32::checked_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_shl
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[`u32::overflowing_add`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_add
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[`u32::overflowing_div`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_div
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[`u32::overflowing_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_mul
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[`u32::overflowing_neg`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_neg
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[`u32::overflowing_rem`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_rem
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[`u32::overflowing_shl`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shl
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[`u32::overflowing_shr`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shr
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[`u32::overflowing_sub`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_sub
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[`u32::saturating_mul`]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.saturating_mul
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Version 1.6.0 (2016-01-21)
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==========================
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@ -16,8 +213,9 @@ Libraries
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---------
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* Stabilized APIs:
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[`Read::read_exact`], [`ErrorKind::UnexpectedEof`] (renamed from
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`UnexpectedEOF`), [`fs::DirBuilder`], [`fs::DirBuilder::new`],
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[`Read::read_exact`],
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[`ErrorKind::UnexpectedEof`][] (renamed from `UnexpectedEOF`),
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[`fs::DirBuilder`], [`fs::DirBuilder::new`],
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[`fs::DirBuilder::recursive`], [`fs::DirBuilder::create`],
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[`os::unix::fs::DirBuilderExt`],
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[`os::unix::fs::DirBuilderExt::mode`], [`vec::Drain`],
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@ -29,10 +227,11 @@ Libraries
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[`collections::hash_set::HashSet::drain`],
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[`collections::binary_heap::Drain`],
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[`collections::binary_heap::BinaryHeap::drain`],
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[`Vec::extend_from_slice`] (renamed from `push_all`),
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[`Vec::extend_from_slice`][] (renamed from `push_all`),
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[`Mutex::get_mut`], [`Mutex::into_inner`], [`RwLock::get_mut`],
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[`RwLock::into_inner`], [`Iterator::min_by_key`] (renamed from
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`min_by`), [`Iterator::max_by_key`] (renamed from `max_by`).
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[`RwLock::into_inner`],
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[`Iterator::min_by_key`][] (renamed from `min_by`),
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[`Iterator::max_by_key`][] (renamed from `max_by`).
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* The [core library][1.6co] is stable, as are most of its APIs.
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* [The `assert_eq!` macro supports arguments that don't implement
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`Sized`][1.6ae], such as arrays. In this way it behaves more like
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