/*:nodoc:*
|
* class ActionAppendConstant
|
*
|
* This stores a list, and appends the value specified by
|
* the const keyword argument to the list.
|
* (Note that the const keyword argument defaults to null.)
|
* The 'appendConst' action is typically useful when multiple
|
* arguments need to store constants to the same list.
|
*
|
* This class inherited from [[Action]]
|
**/
|
|
'use strict';
|
|
var util = require('util');
|
|
var Action = require('../../action');
|
|
/*:nodoc:*
|
* new ActionAppendConstant(options)
|
* - options (object): options hash see [[Action.new]]
|
*
|
**/
|
var ActionAppendConstant = module.exports = function ActionAppendConstant(options) {
|
options = options || {};
|
options.nargs = 0;
|
if (typeof options.constant === 'undefined') {
|
throw new Error('constant option is required for appendAction');
|
}
|
Action.call(this, options);
|
};
|
util.inherits(ActionAppendConstant, Action);
|
|
/*:nodoc:*
|
* ActionAppendConstant#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. Save result in namespace object
|
**/
|
ActionAppendConstant.prototype.call = function (parser, namespace) {
|
var items = [].concat(namespace[this.dest] || []);
|
items.push(this.constant);
|
namespace.set(this.dest, items);
|
};
|
