Mozilla 发布的编程语言，Rust 0.3 发布

   <p><a href="/misc/goto?guid=4958326621415688942" target="_blank">Rust 0.3</a> 发布了，Rust 是 Mozilla 目前正在开发一个新的编程语言，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。</p>    <p>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。</p>    <p>Rust 最早是在Mozilla的社区峰会上公之于众的，当时就有人问以后是否会用Rust重写Firefox，Brenda说希望如此。Rust目前还处于初期的开发阶段，开发团队目前并不想花太多的时间在语法上，不过他们还是提供了一小段代码：</p>    <p></p>    <pre class="brush:java; toolbar: true; auto-links: false;">iter pairs() -> tup(int,int) {     let int i = 0;     let int j = 0;      while (i < 10) {        put tup(i, j);        i += 1;        j += i;      }    }    fn main() {      let int i = 10;      let int j = 0;      for each (tup(int,int) p in pairs()) {          log p._0;          log p._1;          check (p._0 + 10 == i);          i += 1;          j = p._1;        }      check(j == 45);    }</pre>    <p></p>    <p>Rust 0.3 Changes：</p>    <pre>    <div id="LC4" class="line">        * ~1900 changes, numerous bugfixes    </div>      <div id="LC6" class="line">        * New coding conveniences    </div>      <div id="LC7" class="line">           * Integer-literal suffix inference    </div>      <div id="LC8" class="line">           * Per-item control over warnings, errors    </div>      <div id="LC9" class="line">           * #[cfg(windows)] and #[cfg(unix)] attributes    </div>      <div id="LC10" class="line">           * Documentation comments    </div>      <div id="LC11" class="line">           * More compact closure syntax    </div>      <div id="LC12" class="line">           * 'do' expressions for treating higher-order functions as    </div>      <div id="LC13" class="line">             control structures    </div>      <div id="LC14" class="line">           * *-patterns (wildcard extended to all constructor fields)    </div>      <div id="LC16" class="line">        * Semantic cleanup    </div>      <div id="LC17" class="line">           * Name resolution pass and exhaustiveness checker rewritten    </div>      <div id="LC18" class="line">           * Region pointers and borrow checking supersede alias    </div>      <div id="LC19" class="line">             analysis    </div>      <div id="LC20" class="line">           * Init-ness checking is now provided by a region-based liveness    </div>      <div id="LC21" class="line">             pass instead of the typestate pass; same for last-use analysis    </div>      <div id="LC22" class="line">           * Extensive work on region pointers    </div>      <div id="LC24" class="line">        * Experimental new language features    </div>      <div id="LC25" class="line">           * Slices and fixed-size, interior-allocated vectors    </div>      <div id="LC26" class="line">           * #!-comments for lang versioning, shell execution    </div>      <div id="LC27" class="line">           * Destructors and iface implementation for classes;    </div>      <div id="LC28" class="line">            type-parameterized classes and class methods    </div>      <div id="LC29" class="line">           * 'const' type kind for types that can be used to implement    </div>      <div id="LC30" class="line">             shared-memory concurrency patterns    </div>      <div id="LC32" class="line">        * Type reflection    </div>      <div id="LC34" class="line">        * Removal of various obsolete features    </div>      <div id="LC35" class="line">           * Keywords: 'be', 'prove', 'syntax', 'note', 'mutable', 'bind',    </div>      <div id="LC36" class="line">                      'crust', 'native' (now 'extern'), 'cont' (now 'again')    </div>      <div id="LC38" class="line">           * Constructs: do-while loops ('do' repurposed), fn binding,    </div>      <div id="LC39" class="line">                        resources (replaced by destructors)    </div>      <div id="LC41" class="line">        * Compiler reorganization    </div>      <div id="LC42" class="line">           * Syntax-layer of compiler split into separate crate    </div>      <div id="LC43" class="line">           * Clang (from LLVM project) integrated into build    </div>      <div id="LC44" class="line">           * Typechecker split into sub-modules    </div>      <div id="LC46" class="line">        * New library code    </div>      <div id="LC47" class="line">           * New time functions    </div>      <div id="LC48" class="line">           * Extension methods for many built-in types    </div>      <div id="LC49" class="line">           * Arc: atomic-refcount read-only / exclusive-use shared cells    </div>      <div id="LC50" class="line">           * Par: parallel map and search routines    </div>      <div id="LC51" class="line">           * Extensive work on libuv interface    </div>      <div id="LC52" class="line">           * Much vector code moved to libraries    </div>      <div id="LC53" class="line">           * Syntax extensions: #line, #col, #file, #mod, #stringify,    </div>      <div id="LC54" class="line">            #include, #include_str, #include_bin    </div>      <div id="LC56" class="line">        * Tool improvements    </div>      <div id="LC57" class="line">           * Cargo automatically resolves dependencies    </div>  </pre>