title: How to read meta data about R function?
body: <p>Let say there is an R function &quot;add&quot; from the &quot;R Packages&quot; book</p>
  <pre><code>#' Add together two numbers
  #' 
  #' @param x A number.
  #' @param y A number.
  #' @return The sum of \code{x} and \code{y}.
  #' @examples
  #' add(1, 1)
  #' add(10, 1)
  add &lt;- function(x, y) {
    x + y
  }
  </code></pre>
  <p>Is it possible to get data about @param value in some way?</p>
  <p>For example, to have function &quot;get_function_meta_data('function_name')&quot; that returns list of function parameters with their descriptions. For example, for function 'add' this function should return something like:</p>
  <pre><code>get_function_meta_data('add')
  &gt; 'param x' =  'A number'
  &gt; 'param y' = 'A number'
  </code></pre>
  <p>Thanks ahead for any ideas!</p>