title: Boost Lexical conversion (negative string ----> float)
body: <p>What would this return?</p>
  
  <pre><code>boost::lexical_cast&lt;float&gt;("-2"); 
  </code></pre>
  
  <p>I am not able to find a lexical_cast conversion from string  to float example in the documentation.</p>
  
  <p>Thanks</p>