- Update to version 1.50:
* This fixes build on armv7 - boo#1181643
+ Language
- You can now use const values for x in [x; N] array expressions.
This has been technically possible since 1.38.0, as it was
unintentionally stabilized.
- Assignments to ManuallyDrop union fields are now considered safe.
+ Compiler
- Added tier 3* support for the armv5te-unknown-linux-uclibceabi
target.
- Added tier 3 support for the aarch64-apple-ios-macabi target.
- The x86_64-unknown-freebsd is now built with the full toolset.
- Dropped support for all cloudabi targets.
* Refer to Rust's platform support page for more information on
Rust's tiered platform support.
+ Libraries
- proc_macro::Punct now implements PartialEq.
- ops::{Index, IndexMut} are now implemented for fixed sized
arrays of any length.
- On Unix platforms, the std::fs::File type now has a "niche" of -1.
This value cannot be a valid file descriptor, and now means Option
takes up the same amount of space as File.
+ Stabilized APIs
bool::then
btree_map::Entry::or_insert_with_key
f32::clamp
f64::clamp
hash_map::Entry::or_insert_with_key
Ord::clamp
RefCell::take
slice::fill
UnsafeCell::get_mut
- The following previously stable methods are now const.
IpAddr::is_ipv4
IpAddr::is_ipv6
IpAddr::is_unspecified
IpAddr::is_loopback
IpAddr::is_multicast
Ipv4Addr::octets
Ipv4Addr::is_loopback
Ipv4Addr::is_private
Ipv4Addr::is_link_local
Ipv4Addr::is_multicast
Ipv4Addr::is_broadcast
Ipv4Addr::is_documentation
Ipv4Addr::to_ipv6_compatible
Ipv4Addr::to_ipv6_mapped
Ipv6Addr::segments
Ipv6Addr::is_unspecified
Ipv6Addr::is_loopback
Ipv6Addr::is_multicast
Ipv6Addr::to_ipv4
Layout::size
Layout::align
Layout::from_size_align
pow for all integer types.
checked_pow for all integer types.
saturating_pow for all integer types.
wrapping_pow for all integer types.
next_power_of_two for all unsigned integer types.
checked_next_power_of_two for all unsigned integer types.
+ Cargo
- Added the [build.rustc-workspace-wrapper] option. This option
sets a wrapper to execute instead of rustc, for workspace members only.
- cargo:rerun-if-changed will now, if provided a directory,
scan the entire contents of that directory for changes.
- Added the --workspace flag to the cargo update command.
+ Misc
- The search results tab and the help button are focusable
with keyboard in rustdoc.
- Running tests will now print the total time taken to execute.
+ Compatibility Notes
- The compare_and_swap method on atomics has been deprecated.
It's recommended to use the compare_exchange and
compare_exchange_weak methods instead.
- Changes in how TokenStreams are checked have fixed some cases
where you could write unhygenic macro_rules! macros.
- #![test] as an inner attribute is now considered unstable
like other inner macro attributes, and reports an error by
default through the soft_unstable lint.
- Overriding a forbid lint at the same level that it was set
is now a hard error.
- You can no longer intercept panic! calls by supplying your own
macro. It's recommended to use the #[panic_handler] attribute
to provide your own implementation.
- Semi-colons after item statements (e.g. struct Foo {};)
now produce a warning.
- Add download_helper.sh to ease download of bootstrap packages