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POWhy classes that don't extends other classes must extend from traits? (with doesn't work)
 

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    <p>i'm starting with Scala and i found this a little weird. In java i could do something like this:</p> <pre><code>interface Foo{} public class Bar implements Foo{} </code></pre> <p>I'm trying to do something similar with Scala, but it doesn't work:</p> <pre><code>trait Foo; class Bar with Foo; // This doesn't work! </code></pre> <p>I have to use the "extends" keyword:</p> <pre><code>class Bar extends Foo; // This works OK! </code></pre> <p>Now, it's fine, but it's not what i wanted.</p> <p>Another thing weird i noted is that given every class in Scala extends from AnyRef (see this image from scala-lang.org: <a href="http://www.scala-lang.org/sites/default/files/images/classhierarchy.png" rel="nofollow noreferrer">http://www.scala-lang.org/sites/default/files/images/classhierarchy.png</a>) i can do this:</p> <pre><code>class Bar extends AnyRef with Foo; // This works too! </code></pre> <p>So, what am i missing? Doesn't have sense to use a trait without extending it?</p> <p>Thank you!</p>
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