Rust 1.7.0

Libraries

---------

* Stabilized APIs

* Path

* [Path::strip_prefix] (renamed from relative_from)

* [path::StripPrefixError] (new error type returned from strip_prefix)

* Ipv4Addr

* [Ipv4Addr::is_loopback]

* [Ipv4Addr::is_private]

* [Ipv4Addr::is_link_local]

* [Ipv4Addr::is_multicast]

* [Ipv4Addr::is_broadcast]

* [Ipv4Addr::is_documentation]

* Ipv6Addr

* [Ipv6Addr::is_unspecified]

* [Ipv6Addr::is_loopback]

* [Ipv6Addr::is_multicast]

* Vec

* [Vec::as_slice]

* [Vec::as_mut_slice]

* String

* [String::as_str]

* [String::as_mut_str]

* Slices

* <[T]>::[clone_from_slice], which now requires the two slices to

be the same length

* <[T]>::[sort_by_key]

* checked, saturated, and overflowing operations

* [i32::checked_rem], [i32::checked_neg], [i32::checked_shl], [i32::checked_shr]

* [i32::saturating_mul]

* [i32::overflowing_add], [i32::overflowing_sub], [i32::overflowing_mul], [i32::overflowing_div]

* [i32::overflowing_rem], [i32::overflowing_neg], [i32::overflowing_shl], [i32::overflowing_shr]

* [u32::checked_rem], [u32::checked_neg], [u32::checked_shl], [u32::checked_shl]

* [u32::saturating_mul]

* [u32::overflowing_add], [u32::overflowing_sub], [u32::overflowing_mul], [u32::overflowing_div]

* [u32::overflowing_rem], [u32::overflowing_neg], [u32::overflowing_shl], [u32::overflowing_shr]

* and checked, saturated, and overflowing operations for other primitive types

* FFI

* [ffi::IntoStringError]

* [CString::into_string]

* [CString::into_bytes]

* [CString::into_bytes_with_nul]

* From for Vec

* IntoStringError

* [IntoStringError::into_cstring]

* [IntoStringError::utf8_error]

* Error for IntoStringError

* Hashing

* [std::hash::BuildHasher]

* [BuildHasher::Hasher]

* [BuildHasher::build_hasher]

* [std::hash::BuildHasherDefault]

* [HashMap::with_hasher]

* [HashMap::with_capacity_and_hasher]

* [HashSet::with_hasher]

* [HashSet::with_capacity_and_hasher]

* [std::collections::hash_map::RandomState]

* [RandomState::new]

* [Validating UTF-8 is faster by a factor of between 7 and 14x for

ASCII input][1.7utf8]. This means that creating Strings and strs

from bytes is faster.

* [The performance of LineWriter (and thus io::stdout) was

improved by using memchr to search for newlines][1.7m].

* [f32::to_degrees and f32::to_radians are stable][1.7f]. The

f64 variants were stabilized previously.

* [BTreeMap was rewritten to use less memory and improve the performance

of insertion and iteration, the latter by as much as 5x][1.7bm].

* [BTreeSet and its iterators, Iter, IntoIter, and Range are

covariant over their contained type][1.7bt].

* [LinkedList and its iterators, Iter and IntoIter are covariant

over their contained type][1.7ll].

* [str::replace now accepts a Pattern][1.7rp], like other string

searching methods.

* [Any is implemented for unsized types][1.7a].

* [Hash is implemented for Duration][1.7h].

Misc

----

* [When running tests with --test, rustdoc will pass --cfg

arguments to the compiler][1.7dt].

* [The compiler is built with RPATH information by default][1.7rpa].

This means that it will be possible to run rustc when installed in

unusual configurations without configuring the dynamic linker search

path explicitly.

* [rustc passes --enable-new-dtags to GNU ld][1.7dta]. This makes

any RPATH entries (emitted with -C rpath) not take precedence

over LD_LIBRARY_PATH.

Cargo

-----

* [cargo rustc accepts a --profile flag that runs rustc under

any of the compilation profiles, 'dev', 'bench', or 'test'][1.7cp].

* [The rerun-if-changed build script directive no longer causes the

build script to incorrectly run twice in certain scenarios][1.7rr].

Compatibility Notes

-------------------

* Soundness fixes to the interactions between associated types and

lifetimes, specified in [RFC 1214], [now generate errors][1.7sf] for

code that violates the new rules. This is a significant change that

is known to break existing code, so it has emitted warnings for the

new error cases since 1.4 to give crate authors time to adapt. The

details of what is changing are subtle; read the RFC for more.

* [Several bugs in the compiler's visibility calculations were

fixed][1.7v]. Since this was found to break significant amounts of

code, the new errors will be emitted as warnings for several release

cycles, under the private_in_public lint.

* Defaulted type parameters were accidentally accepted in positions

that were not intended. In this release, [defaulted type parameters

appearing outside of type definitions will generate a

warning][1.7d], which will become an error in future releases.

* [Parsing "." as a float results in an error instead of 0][1.7p].

That is, ".".parse::() returns Err, not Ok(0.0).

* [Borrows of closure parameters may not outlive the closure][1.7bc].

[1.7a]: https://github.com/rust-lang/rust/pull/30928

[1.7bc]: https://github.com/rust-lang/rust/pull/30341

[1.7bm]: https://github.com/rust-lang/rust/pull/30426

[1.7bt]: https://github.com/rust-lang/rust/pull/30998

[1.7cp]: https://github.com/rust-lang/cargo/pull/2224

[1.7d]: https://github.com/rust-lang/rust/pull/30724

[1.7dt]: https://github.com/rust-lang/rust/pull/30372

[1.7dta]: https://github.com/rust-lang/rust/pull/30394

[1.7f]: https://github.com/rust-lang/rust/pull/30672

[1.7h]: https://github.com/rust-lang/rust/pull/30818

[1.7ll]: https://github.com/rust-lang/rust/pull/30663

[1.7m]: https://github.com/rust-lang/rust/pull/30381

[1.7p]: https://github.com/rust-lang/rust/pull/30681

[1.7rp]: https://github.com/rust-lang/rust/pull/29498

[1.7rpa]: https://github.com/rust-lang/rust/pull/30353

[1.7rr]: https://github.com/rust-lang/cargo/pull/2279

[1.7sf]: https://github.com/rust-lang/rust/pull/30389

[1.7utf8]: https://github.com/rust-lang/rust/pull/30740

[1.7v]: https://github.com/rust-lang/rust/pull/29973

[RFC 1214]: https://github.com/rust-lang/rfcs/blob/master/text/1214-projections-lifetimes-and-wf.md

[BuildHasher::Hasher]: http://doc.rust-lang.org/nightly/std/hash/trait.Hasher.html

[BuildHasher::build_hasher]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html#tymethod.build_hasher

[CString::into_bytes_with_nul]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes_with_nul

[CString::into_bytes]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_bytes

[CString::into_string]: http://doc.rust-lang.org/nightly/std/ffi/struct.CString.html#method.into_string

[HashMap::with_capacity_and_hasher]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_capacity_and_hasher

[HashMap::with_hasher]: http://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html#method.with_hasher

[HashSet::with_capacity_and_hasher]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_capacity_and_hasher

[HashSet::with_hasher]: http://doc.rust-lang.org/nightly/std/collections/struct.HashSet.html#method.with_hasher

[IntoStringError::into_cstring]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.into_cstring

[IntoStringError::utf8_error]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html#method.utf8_error

[Ipv4Addr::is_broadcast]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_broadcast

[Ipv4Addr::is_documentation]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_documentation

[Ipv4Addr::is_link_local]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_link_local

[Ipv4Addr::is_loopback]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_loopback

[Ipv4Addr::is_multicast]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_multicast

[Ipv4Addr::is_private]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv4Addr.html#method.is_private

[Ipv6Addr::is_loopback]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_loopback

[Ipv6Addr::is_multicast]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_multicast

[Ipv6Addr::is_unspecified]: http://doc.rust-lang.org/nightly/std/net/struct.Ipv6Addr.html#method.is_unspecified

[Path::strip_prefix]: http://doc.rust-lang.org/nightly/std/path/struct.Path.html#method.strip_prefix

[RandomState::new]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html#method.new

[String::as_mut_str]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_mut_str

[String::as_str]: http://doc.rust-lang.org/nightly/std/string/struct.String.html#method.as_str

[Vec::as_mut_slice]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_mut_slice

[Vec::as_slice]: http://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#method.as_slice

[clone_from_slice]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.clone_from_slice

[ffi::IntoStringError]: http://doc.rust-lang.org/nightly/std/ffi/struct.IntoStringError.html

[i32::checked_neg]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_neg

[i32::checked_rem]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_rem

[i32::checked_shl]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shl

[i32::checked_shr]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.checked_shr

[i32::overflowing_add]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_add

[i32::overflowing_div]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_div

[i32::overflowing_mul]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_mul

[i32::overflowing_neg]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_neg

[i32::overflowing_rem]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_rem

[i32::overflowing_shl]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shl

[i32::overflowing_shr]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_shr

[i32::overflowing_sub]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.overflowing_sub

[i32::saturating_mul]: http://doc.rust-lang.org/nightly/std/primitive.i32.html#method.saturating_mul

[path::StripPrefixError]: http://doc.rust-lang.org/nightly/std/path/struct.StripPrefixError.html

[sort_by_key]: http://doc.rust-lang.org/nightly/std/primitive.slice.html#method.sort_by_key

[std::collections::hash_map::RandomState]: http://doc.rust-lang.org/nightly/std/collections/hash_map/struct.RandomState.html

[std::hash::BuildHasherDefault]: http://doc.rust-lang.org/nightly/std/hash/struct.BuildHasherDefault.html

[std::hash::BuildHasher]: http://doc.rust-lang.org/nightly/std/hash/trait.BuildHasher.html

[u32::checked_neg]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg

[u32::checked_rem]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_rem

[u32::checked_neg]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_neg

[u32::checked_shl]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.checked_shl

[u32::overflowing_add]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_add

[u32::overflowing_div]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_div

[u32::overflowing_mul]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_mul

[u32::overflowing_neg]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_neg

[u32::overflowing_rem]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_rem

[u32::overflowing_shl]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shl

[u32::overflowing_shr]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_shr

[u32::overflowing_sub]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.overflowing_sub

[u32::saturating_mul]: http://doc.rust-lang.org/nightly/std/primitive.u32.html#method.saturating_mul