/*:nodoc:* * class ActionVersion * * Support action for printing program version * This class inherited from [[Action]] **/'use strict'; var util = require('util'); var Action = require('../action'); //// Constants//var c = require('../const'); /*:nodoc:* * new ActionVersion(options) * - options (object): options hash see [[Action.new]] * **/var ActionVersion = module.exports = function ActionVersion(options) {  options = options || {};  options.defaultValue = (options.defaultValue ? options.defaultValue : c.SUPPRESS);  options.dest = (options.dest || c.SUPPRESS);  options.nargs = 0;  this.version = options.version;  Action.call(this, options);};util.inherits(ActionVersion, Action); /*:nodoc:* * ActionVersion#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) * * Print version and exit **/ActionVersion.prototype.call = function (parser) {  var version = this.version || parser.version;  var formatter = parser._getFormatter();  formatter.addText(version);  parser.exit(0, formatter.formatHelp());};