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<!-- Generator: GNU source-highlight 
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
<pre><tt><i><font color="#9A1900">// Example Scala file for source-highlight.</font></i>

<b><font color="#0000FF">case</font></b> <b><font color="#0000FF">class</font></b> <font color="#008080">Point</font><font color="#990000">(</font>x<b><font color="#0000FF">:</font></b> <font color="#009900">Double</font><font color="#990000">,</font> y<b><font color="#0000FF">:</font></b> <font color="#009900">Double</font><font color="#990000">)</font>  

<b><font color="#0000FF">abstract</font></b> <b><font color="#0000FF">case</font></b> <b><font color="#0000FF">class</font></b> <font color="#008080">Shape</font> <font color="#FF0000">{</font> <b><font color="#0000FF">def</font></b> <b><font color="#000000">draw</font></b><font color="#990000">()</font><b><font color="#0000FF">:</font></b> Unit <b><font color="#0000FF">=</font></b> <b><font color="#000000">println</font></b><font color="#990000">(</font><b><font color="#0000FF">this</font></b><font color="#990000">)</font> <font color="#FF0000">}</font>  
<b><font color="#0000FF">case</font></b> <b><font color="#0000FF">class</font></b> <font color="#008080">Circle</font><font color="#990000">(</font>center<b><font color="#0000FF">:</font></b> Point<font color="#990000">,</font> radius<b><font color="#0000FF">:</font></b> <font color="#009900">Double</font><font color="#990000">)</font> <b><font color="#0000FF">extends</font></b> Shape  
<b><font color="#0000FF">case</font></b> <b><font color="#0000FF">class</font></b> <font color="#008080">Rectangle</font><font color="#990000">(</font>lowerLeft<b><font color="#0000FF">:</font></b> Point<font color="#990000">,</font> height<b><font color="#0000FF">:</font></b> <font color="#009900">Double</font><font color="#990000">,</font> width<b><font color="#0000FF">:</font></b> <font color="#009900">Double</font><font color="#990000">)</font> <b><font color="#0000FF">extends</font></b> Shape

<b><font color="#000080">import</font></b> scala<font color="#990000">.</font>actors<font color="#990000">.</font><b><font color="#0000FF">_</font></b>  
<b><font color="#000080">import</font></b> scala<font color="#990000">.</font>actors<font color="#990000">.</font>Actor<font color="#990000">.</font><b><font color="#0000FF">_</font></b>  

<b><font color="#0000FF">object</font></b> ShapeDrawer <b><font color="#0000FF">extends</font></b> Actor <font color="#FF0000">{</font>  
    <b><font color="#0000FF">def</font></b> <b><font color="#000000">act</font></b><font color="#990000">()</font> <font color="#FF0000">{</font>  
        loop <font color="#FF0000">{</font>   
            receive <font color="#FF0000">{</font>  
                <b><font color="#0000FF">case</font></b> s<b><font color="#0000FF">:</font></b> Shape <b><font color="#0000FF">=&gt;</font></b> <b><font color="#000000">s.draw</font></b><font color="#990000">()</font>  
                <b><font color="#0000FF">case</font></b> <font color="#FF0000">"exit"</font>   <b><font color="#0000FF">=&gt;</font></b> <font color="#FF0000">{</font> <b><font color="#000000">println</font></b><font color="#990000">(</font><font color="#FF0000">"exiting..."</font><font color="#990000">);</font> exit <font color="#FF0000">}</font>  
                <b><font color="#0000FF">case</font></b> x<b><font color="#0000FF">:</font></b> Any   <b><font color="#0000FF">=&gt;</font></b> <b><font color="#000000">println</font></b><font color="#990000">(</font><font color="#FF0000">"Error: Unknown message! "</font> <font color="#990000">+</font> x<font color="#990000">)</font>
            <font color="#FF0000">}</font>
        <font color="#FF0000">}</font>
    <font color="#FF0000">}</font>
<font color="#FF0000">}</font>

<b><font color="#000000">ShapeDrawer.start</font></b><font color="#990000">()</font> 
ShapeDrawer <font color="#990000">!</font> <b><font color="#000000">Circle(Point</font></b><font color="#990000">(</font><font color="#993399">0.0</font><font color="#990000">,</font><font color="#993399">0.0</font><font color="#990000">),</font> <font color="#993399">1.0</font><font color="#990000">)</font>     
ShapeDrawer <font color="#990000">!</font> <b><font color="#000000">Rectangle(Point</font></b><font color="#990000">(</font><font color="#993399">0.0</font><font color="#990000">,</font><font color="#993399">0.0</font><font color="#990000">),</font> <font color="#993399">2</font><font color="#990000">,</font> <font color="#993399">5</font><font color="#990000">)</font> 
ShapeDrawer <font color="#990000">!</font> <font color="#993399">3.14159</font>  
ShapeDrawer <font color="#990000">!</font> <font color="#FF0000">"exit"</font>   

<i><font color="#9A1900">// Output:</font></i>
<i><font color="#9A1900">// =&gt; Circle(Point(0.0,0.0),1.0)</font></i>
<i><font color="#9A1900">// =&gt; Rectangle(Point(0.0,0.0),2.0,5.0)</font></i>
<i><font color="#9A1900">// =&gt; Error: Unknown message! 3.14159</font></i>
<i><font color="#9A1900">// =&gt; exiting...</font></i>

Server<font color="#990000">.</font>fork<font color="#990000">;</font>
</tt></pre>