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+<h1>Well, In This Case...</h1>
+<table class="table meta-table table-condensed">
+  <tbody>
+    <tr>
+      <td class="header-column"><strong>Contributed by</strong></td>
+      <td>Andrew Phillips</td>
+    </tr>
+    <tr>
+      <td><strong>Source</strong></td>
+      <td><a target="_blank" href="https://groups.google.com/d/topic/scala-language/DDpvGcrs3QQ/">Didier Dupont </a></td>
+    </tr>
+    <tr>
+      <td><strong>First tested with Scala version</strong></td>
+      <td>2.11.2</td>
+    </tr>
+  </tbody>
+</table>
+<div class="code-snippet">
+  <h3>What is the result of executing the following code?</h3>
+<pre class="prettyprint lang-scala">
+case class Toy(squeezeMsg: String = this.toString) {
+  override def toString = squeezeMsg
+}
+println(Toy("My name is Fido!") == new Toy("My name is Fido!"))
+println(Toy() == new Toy())
+</pre>
+    <ol>
+    <li>Fails to compile</li>
+    <li id="correct-answer">Prints:
+<pre class="prettyprint lang-scala">
+true
+false
+</pre>
+    </li>
+    <li>Prints:
+<pre class="prettyprint lang-scala">
+true
+true
+</pre>
+    </li>
+    <li>The first statement prints:
+<pre class="prettyprint lang-scala">
+true
+</pre>
+and the second throws a runtime exception
+    </li>
+  </ol>
+</div>
+<button id="show-and-tell" class="btn btn-primary" href="#">Display the correct answer, explanation and comments</button>
+<div id="explanation" class="explanation" style="display:none">
+  <h3>Explanation</h3>
+  <p>
+    As per the SLS (&sect;5.3.2), if the elements (i.e. constructor parameters) of
+    a case class have default arguments, these are carried over to the 
+    <tt>apply</tt> factory method on the companion object that is generated by
+    the compiler. Also, when <tt>Toy</tt> is declared, there is indeed a 
+    <tt>this</tt> reference in scope, so the code compiles successfully.
+  </p>
+  <p>
+    The <tt>this</tt> in <tt>this.toString</tt> (the value of the default argument
+    for <tt>squeezeMsg</tt>) does not refer to the instance of <tt>Toy</tt> being
+    created, however. Instead, it resolves to the instance of the class or object
+    in which <tt>Toy</tt>'s constructor is defined.
+  </p>
+  <p>
+    When running the example in the REPL, the class or object invoking the
+    constructor <tt>new Toy()</tt> directly is a generated &quot;script object&quot;:
+<pre class="prettyprint lang-scala">
+scala> println(new Toy())
+$line46.$read$$iw$$iw$@7335aa7c
+</pre>
+    When creating a new <tt>Toy</tt> instance using the standard factory method
+    generated for case classes, however, the class or object invoking <tt>Toy</tt>'s
+    constructor is actually the companion object <tt>Toy</tt>:
+<pre class="prettyprint lang-scala">
+scala> println(Toy())
+Toy
+</pre>
+  </p>
+  <p>
+    Since the generated implementation of <tt>equals</tt> for case classes
+    uses the values of the case class's elements (<tt>squeezeMsg</tt>, in this case)
+    to determine equality, the two instances <tt>Toy()</tt> and <tt>new Toy()</tt>
+    are, thus, <em>not</em> equal.
+  </p>
+</div>
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