title: Kotlin secondary constructor
body: <p>How do I declare a secondary constructor in Kotlin? </p>
  
  <p>Is there any documentation about that?</p>
  
  <p>Following does not compile...</p>
  
  <pre><code>class C(a : Int) {
    // Secondary constructor
    this(s : String) : this(s.length) { ... }
  }
  </code></pre>