text: /**
   * class Action
   *
   * Base class for all actions
   * Do not call in your code, use this class only for inherits your own action
   *
   * Information about how to convert command line strings to Javascript objects.
   * Action objects are used by an ArgumentParser to represent the information
   * needed to parse a single argument from one or more strings from the command
   * line. The keyword arguments to the Action constructor are also all attributes
   * of Action instances.
   *
   * #####Alowed keywords:
   *
   * - `store`
   * - `storeConstant`
   * - `storeTrue`
   * - `storeFalse`
   * - `append`
   * - `appendConstant`
   * - `count`
   * - `help`
   * - `version`
   *
   * Information about action options see [[Action.new]]
   *
   * See also [original guide](http://docs.python.org/dev/library/argparse.html#action)
   *
   **/
  
  'use strict';
  
  
  // Constants
  var c = require('./const');
  
  
  /**
   * new Action(options)
   *
   * Base class for all actions. Used only for inherits
   *
   *
   * ##### Options:
   *
   * - `optionStrings`  A list of command-line option strings for the action.
   * - `dest`  Attribute to hold the created object(s)
   * - `nargs`  The number of command-line arguments that should be consumed.
   * By default, one argument will be consumed and a single value will be
   * produced.
   * - `constant`  Default value for an action with no value.
   * - `defaultValue`  The value to be produced if the option is not specified.
   * - `type`  Cast to 'string'|'int'|'float'|'complex'|function (string). If
   * None, 'string'.
   * - `choices`  The choices available.
   * - `required`  True if the action must always be specified at the command
   * line.
   * - `help`  The help describing the argument.
   * - `metavar`  The name to be used for the option's argument with the help
   * string. If None, the 'dest' value will be used as the name.
   *
   * ##### nargs supported values:
   *
   * - `N` (an integer) consumes N arguments (and produces a list)
   * - `?`  consumes zero or one arguments
   * - `*` consumes zero or more arguments (and produces a list)
   * - `+` consumes one or more arguments (and produces a list)
   *
   * Note: that the difference between the default and nargs=1 is that with the
   * default, a single value will be produced, while with nargs=1, a list
   * containing a single value will be produced.
   **/
  var Action = module.exports = function Action(options) {
    options = options || {};
    this.optionStrings = options.optionStrings || [];
    this.dest = options.dest;
    this.nargs = typeof options.nargs !== 'undefined' ? options.nargs : null;
    this.constant = typeof options.constant !== 'undefined' ? options.constant : null;
    this.defaultValue = options.defaultValue;
    this.type = typeof options.type !== 'undefined' ? options.type : null;
    this.choices = typeof options.choices !== 'undefined' ? options.choices : null;
    this.required = typeof options.required !== 'undefined' ? options.required : false;
    this.help = typeof options.help !== 'undefined' ? options.help : null;
    this.metavar = typeof options.metavar !== 'undefined' ? options.metavar : null;
  
    if (!(this.optionStrings instanceof Array)) {
      throw new Error('optionStrings should be an array');
    }
    if (typeof this.required !== 'undefined' && typeof this.required !== 'boolean') {
      throw new Error('required should be a boolean');
    }
  };
  
  /**
   * Action#getName -> String
   *
   * Tells action name
   **/
  Action.prototype.getName = function () {
    if (this.optionStrings.length > 0) {
      return this.optionStrings.join('/');
    } else if (this.metavar !== null && this.metavar !== c.SUPPRESS) {
      return this.metavar;
    } else if (typeof this.dest !== 'undefined' && this.dest !== c.SUPPRESS) {
      return this.dest;
    }
    return null;
  };
  
  /**
   * Action#isOptional -> Boolean
   *
   * Return true if optional
   **/
  Action.prototype.isOptional = function () {
    return !this.isPositional();
  };
  
  /**
   * Action#isPositional -> Boolean
   *
   * Return true if positional
   **/
  Action.prototype.isPositional = function () {
    return (this.optionStrings.length === 0);
  };
  
  /**
   * Action#call(parser, namespace, values, optionString) -> Void
   * - parser (ArgumentParser): current parser
   * - namespace (Namespace): namespace for output data
   * - values (Array): parsed values
   * - optionString (Array): input option string(not parsed)
   *
   * Call the action. Should be implemented in inherited classes
   *
   * ##### Example
   *
   *      ActionCount.prototype.call = function (parser, namespace, values, optionString) {
   *        namespace.set(this.dest, (namespace[this.dest] || 0) + 1);
   *      };
   *
   **/
  Action.prototype.call = function () {
    throw new Error('.call() not defined');// Not Implemented error
  };
  