title: Why the compiler does not recognize Google Mock wildcard?
body: <p>When I try to use:</p>
  
  <pre><code>ON_CALL(mock, foo(_))
  </code></pre>
  
  <p>Compilation error is thrown:</p>
  
  <pre><code>Error   1   error C2065: '_' : undeclared identifier    
  </code></pre>
  
  <p>I am using visual studio 2012.</p>