1.9.0 #
- Released on: 26 May, 2016
- Branched from master on: 8 April, 2016
Language #
- The
#[deprecated]
attribute when applied to an API will generate warnings when used. The warnings may be suppressed with#[allow(deprecated)]
. RFC 1270. fn
item types are zero sized, and eachfn
names a unique type. This will break code that transmutesfn
s, so callingtransmute
on afn
type will generate a warning for a few cycles, then will be converted to an error.- Field and method resolution understand visibility, so private fields and methods cannot prevent the proper use of public fields and methods.
- The parser considers unicode codepoints in the
PATTERN_WHITE_SPACE
category to be whitespace.
Stabilized APIs #
std::panic
std::panic::catch_unwind
(renamed fromrecover
)std::panic::resume_unwind
(renamed frompropagate
)std::panic::AssertUnwindSafe
(renamed fromAssertRecoverSafe
)std::panic::UnwindSafe
(renamed fromRecoverSafe
)str::is_char_boundary
<*const T>::as_ref
<*mut T>::as_ref
<*mut T>::as_mut
AsciiExt::make_ascii_uppercase
AsciiExt::make_ascii_lowercase
char::decode_utf16
char::DecodeUtf16
char::DecodeUtf16Error
char::DecodeUtf16Error::unpaired_surrogate
BTreeSet::take
BTreeSet::replace
BTreeSet::get
HashSet::take
HashSet::replace
HashSet::get
OsString::with_capacity
OsString::clear
OsString::capacity
OsString::reserve
OsString::reserve_exact
OsStr::is_empty
OsStr::len
std::os::unix::thread
RawPthread
JoinHandleExt
JoinHandleExt::as_pthread_t
JoinHandleExt::into_pthread_t
HashSet::hasher
HashMap::hasher
CommandExt::exec
File::try_clone
SocketAddr::set_ip
SocketAddr::set_port
SocketAddrV4::set_ip
SocketAddrV4::set_port
SocketAddrV6::set_ip
SocketAddrV6::set_port
SocketAddrV6::set_flowinfo
SocketAddrV6::set_scope_id
slice::copy_from_slice
ptr::read_volatile
ptr::write_volatile
OpenOptions::create_new
TcpStream::set_nodelay
TcpStream::nodelay
TcpStream::set_ttl
TcpStream::ttl
TcpStream::set_only_v6
TcpStream::only_v6
TcpStream::take_error
TcpStream::set_nonblocking
TcpListener::set_ttl
TcpListener::ttl
TcpListener::set_only_v6
TcpListener::only_v6
TcpListener::take_error
TcpListener::set_nonblocking
UdpSocket::set_broadcast
UdpSocket::broadcast
UdpSocket::set_multicast_loop_v4
UdpSocket::multicast_loop_v4
UdpSocket::set_multicast_ttl_v4
UdpSocket::multicast_ttl_v4
UdpSocket::set_multicast_loop_v6
UdpSocket::multicast_loop_v6
UdpSocket::set_multicast_ttl_v6
UdpSocket::multicast_ttl_v6
UdpSocket::set_ttl
UdpSocket::ttl
UdpSocket::set_only_v6
UdpSocket::only_v6
UdpSocket::join_multicast_v4
UdpSocket::join_multicast_v6
UdpSocket::leave_multicast_v4
UdpSocket::leave_multicast_v6
UdpSocket::take_error
UdpSocket::connect
UdpSocket::send
UdpSocket::recv
UdpSocket::set_nonblocking
Libraries #
std::sync::Once
is poisoned if its initialization function fails.cell::Ref
andcell::RefMut
can contain unsized types.- Most types implement
fmt::Debug
. - The default buffer size used by
BufReader
andBufWriter
was reduced to 8K, from 64K. This is in line with the buffer size used by other languages. Instant
,SystemTime
andDuration
implement+=
and-=
.Duration
additionally implements*=
and/=
.Skip
is aDoubleEndedIterator
.From<[u8; 4]>
is implemented forIpv4Addr
.Chain
implementsBufRead
.HashMap
,HashSet
and iterators are covariant.
Cargo #
- Cargo can now run concurrently.
- Top-level overrides allow specific revisions of crates to be overridden through the entire crate graph. This is intended to make upgrades easier for large projects, by allowing crates to be forked temporarily until they’ve been upgraded and republished.
- Cargo exports a
CARGO_PKG_AUTHORS
environment variable. - Cargo will pass the contents of the
RUSTFLAGS
variable torustc
on the commandline.rustc
arguments can also be specified in thebuild.rustflags
configuration key.
Performance #
- The time complexity of comparing variables for equivalence during type unification is reduced from O(n!) to O(n). This leads to major compilation time improvement in some scenarios.
ToString
is specialized forstr
, giving it the same performance asto_owned
.- Spawning processes with
Command::output
no longer creates extra threads. #[derive(PartialEq)]
and#[derive(PartialOrd)]
emit less code for C-like enums.
Misc #
- Passing the
--quiet
flag to a test runner will produce much-abbreviated output. - The Rust Project now publishes std binaries for the
mips-unknown-linux-musl
,mipsel-unknown-linux-musl
, andi586-pc-windows-msvc
targets.
Compatibility Notes #
std::sync::Once
is poisoned if its initialization function fails.- It is illegal to define methods with the same name in overlapping
inherent
impl
blocks. fn
item types are zero sized, and eachfn
names a unique type. This will break code that transmutesfn
s, so callingtransmute
on afn
type will generate a warning for a few cycles, then will be converted to an error.- Improvements to const evaluation may trigger new errors when integer literals are out of range.