title: May variable template variables vary?
body: <p>Draft C++14 has added support for variable templates. The examples in the proposal (<a href="http://isocpp.org/files/papers/N3651.pdf" rel="nofollow">N3651</a>) all show constants (either <code>constexpr</code> or <code>const</code>), but, from what I can tell, this is not required. May variable template variables vary, e.g., be assigned to?</p>
  
  <pre><code>template&lt;typename T&gt;
  T magicVal = 42;
  
  magicVal&lt;int&gt; = 0;       // okay?
  </code></pre>