text: 
  /*!
   * Stylus - Function
   * Copyright(c) 2010 LearnBoost <dev@learnboost.com>
   * MIT Licensed
   */
  
  /**
   * Module dependencies.
   */
  
  var Node = require('./node');
  
  /**
   * Initialize a new `Function` with `name`, `params`, and `body`.
   *
   * @param {String} name
   * @param {Params|Function} params
   * @param {Block} body
   * @api public
   */
  
  var Function = module.exports = function Function(name, params, body){
    Node.call(this);
    this.name = name;
    this.params = params;
    this.block = body;
    if ('function' == typeof params) this.fn = params;
  };
  
  /**
   * Check function arity.
   *
   * @return {Boolean}
   * @api public
   */
  
  Function.prototype.__defineGetter__('arity', function(){
    return this.params.length;
  });
  
  /**
   * Inherit from `Node.prototype`.
   */
  
  Function.prototype.__proto__ = Node.prototype;
  
  /**
   * Return hash.
   *
   * @return {String}
   * @api public
   */
  
  Function.prototype.__defineGetter__('hash', function(){
    return 'function ' + this.name;
  });
  
  /**
   * Return a clone of this node.
   * 
   * @return {Node}
   * @api public
   */
  
  Function.prototype.clone = function(){
    if (this.fn) {
      var clone = new Function(
          this.name
        , this.fn);
    } else {
      var clone = new Function(
          this.name
        , this.params.clone()
        , this.block.clone());
    }
    clone.lineno = this.lineno;
    clone.filename = this.filename;
    return clone;
  };
  
  /**
   * Return <name>(param1, param2, ...).
   *
   * @return {String}
   * @api public
   */
  
  Function.prototype.toString = function(){
    if (this.fn) {
      return this.name
        + '('
        + this.fn.toString()
          .match(/^function *\w*\((.*?)\)/)
          .slice(1)
          .join(', ')
        + ')';
    } else {
      return this.name
        + '('
        + this.params.nodes.join(', ')
        + ')';
    }
  };
  