Mozilla 编程语言,Rust 1.4 发布
Rust 是 Mozilla 的一个新的编程语言,由web语言的领军人物Brendan Eich(js之父),Dave Herman以及Mozilla公司的Graydon Hoare 合力开发。
创建这个新语言的目的是为了解决一个很顽疾的问题:软件的演进速度大大低于硬件的演进,软件在语言级别上无法真正利用多核计算带来的性能提升。Rust是针对多核体系提出的语言,并且吸收一些其他动态语言的重要特性,比如不需要管理内存,比如不会出现Null指针等等。
特点:
-
零成本的抽象
-
移动语义
-
保证内存安全
-
线程没有数据竞争
-
trait-based泛型
-
模式匹配
-
类型推断
-
最小运行时
-
高效的C绑定
重点
-
Windows builds targeting the 64-bit MSVC ABI and linker (instead of GNU) are now supported and recommended for use.
重大更新
-
Several changes have been made to fix type soundness and improve the behavior of associated types. See RFC 1214. Although we have mostly introduced these changes as warnings this release, to become errors next release, there are still some scenarios that will see immediate breakage.
-
The
str::lines
andBufRead::lines
iterators treat\r\n
as line breaks in addition to\n
.
语言
-
use
statements that import multiple items can now rename them, as inuse foo::{bar as kitten, baz as puppy}
. -
pub extern crate
, which does not behave as expected, issues a warning until a better solution is found.
Libraries
-
Many APIs were stabilized:
<Box<str>>::into_string
,Arc::downgrade
,Arc::get_mut
,Arc::make_mut
,Arc::try_unwrap
,Box::from_raw
,Box::into_raw
,CStr::to_str
,CStr::to_string_lossy
,CString::from_raw
,CString::into_raw
,IntoRawFd::into_raw_fd
,IntoRawFd
,IntoRawHandle::into_raw_handle
,IntoRawHandle
,IntoRawSocket::into_raw_socket
,IntoRawSocket
,Rc::downgrade
,Rc::get_mut
,Rc::make_mut
,Rc::try_unwrap
,Result::expect
,String::into_boxed_str
,TcpStream::read_timeout
,TcpStream::set_read_timeout
,TcpStream::set_write_timeout
,TcpStream::write_timeout
,UdpSocket::read_timeout
,UdpSocket::set_read_timeout
,UdpSocket::set_write_timeout
,UdpSocket::write_timeout
,Vec::append
,Vec::split_off
,VecDeque::append
,VecDeque::retain
,VecDeque::split_off
,rc::Weak::upgrade
,rc::Weak
,slice::Iter::as_slice
,slice::IterMut::into_slice
,str::CharIndices::as_str
,str::Chars::as_str
,str::split_at_mut
,str::split_at
,sync::Weak::upgrade
,sync::Weak
,thread::park_timeout
,thread::sleep
. -
Some APIs were deprecated:
BTreeMap::with_b
,BTreeSet::with_b
,Option::as_mut_slice
,Option::as_slice
,Result::as_mut_slice
,Result::as_slice
,f32::from_str_radix
,f64::from_str_radix
. -
Reverse-searching strings is faster with the 'two-way' algorithm.
-
The
Windows
,Chunks
, andChunksMut
iterators over slices alloverridecount
,nth
andlast
with an O(1) implementation. -
Extend<String>
andFromIterator<String
are both implemented forString
. -
HashMap
andHashSet
implementExtend<&T>
whereT: Copy
as part of RFC 839. -
extern fn
s of with the "Rust" and "C" ABIs implement common traits includingEq
,Ord
,Debug
,Hash
. -
&mut T
whereT: Write
also implementsWrite
. -
A stable regression in
VecDec::push_back
that caused panics for zero-sized types was fixed.
Miscellaneous
-
The compiler no longer uses the 'morestack' feature to prevent stack overflow. Instead it uses guard pages and stack probes (though stack probes are not yet implemented on any platform but Windows).
-
The compiler matches traits faster when projections are involved.
-
The 'improper_ctypes' lint no longer warns about use of
isize
andusize
. -
Cargo now displays useful information about what its doing during
cargo update
.
更新日志:RELEASES.md
下载地址:1.4.0