title: Multiple Data Types with Vectors of Vectors
body: <p>I am trying to find a way to create a 3 dimensional vector with three different types, such that it is structured as: </p>
  
  <pre><code>Vector[long][int][double];
  </code></pre>
  
  <p>I have found plenty of examples that show how to create a 3d vector with a single data type, such as:</p>
  
  <pre><code>std::vector&lt;vector&lt;vector&lt;int&gt; &gt; &gt;;
  </code></pre>
  
  <p>But I can now find or figure out how to assign multiple data types to the vector. </p>