How to document CoffeeScript source code with JSDoc?

I have some code written in CoffeeScript and I want to optimize the generated JavaScript with the Google Closure Compiler, so these files need to be documented with JSDoc.

My question is, how can I document the *.coffee files to generate javascript containing working JSDoc for the closure compiler?

One more question: is there a way to keep a single-line comment in *.coffee ?

CoffeeScript Input:

### define function variable before block to avoid code being appended to closing part of JSDoc comment ###
cube = null

###*
 * Function to calculate cube of input
 * @param {number} Number to operate on
 * @return {number} Cube of input
 ###

cube = (x) -> x*x*x

JavaScript Output from windows cmd prompt for: coffee -cpb src.coffee

// Generated by CoffeeScript 1.6.3
/* define function variable before block to avoid code being appended to closing part of JSDoc comment*/

var cube;

cube = null;

/**
 * Function to calculate cube of input
 * @param {number} Number to operate on
 * @return {number} Cube of input
*/

cube = function(x) {
  return x * x * x;
};

Edit

As detailed in other answer CoffeeScript 1.7.1 has better method available to solve this problem.

Since I cannot respond directly to Billy above, it seems CoffeeScript 1.7.1 has better support for this:

###*
# Sets the language and redraws the UI.
# @param {object} data Object with `language` property
# @param {string} data.language Language code
###

handleLanguageSet: (data) ->

outputs

/**
 * Sets the language and redraws the UI.
 * @param {object} data Object with `language` property
 * @param {string} data.language Language code
 */
handleLanguageSet: function(data) {}