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update 02/21 and 03/10

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2014-06-10 12:14:55 +08:00
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chapter3/06_Attributes.html
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<h1 id="-">特性</h1>
<p>特性提供了关于声明和类型的更多信息。在Swift中有两类特性，用于修饰声明的以及用于修饰类型的。例如，<code>required</code>特性，当应用于一个类的指定或便利初始化器声明时，表明它的每个子类都必须实现那个初始化器。再比如<code>noreturn</code>特性，当应用于函数或方法类型时，表明该函数或方法不会返回到它的调用者。</p>