title: boost::program_options: parameters with a fixed and a variable token?
body: <p>Is it possible to use parameters of this kind with boost::program_options?  </p>
  
  <pre><code>program  -p1 123 -p2 234 -p3 345 -p12 678
  </code></pre>
  
  <p>i.e., is it possible to specify the parameter name with a first token (e.g. <code>-p</code>) followed by a number,  dynamically?<br>
  I would like to avoid this:</p>
  
  <pre><code>program  -p 1 123 -p 2 234 -p 3 345 -p 12 678
  </code></pre>