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48 lines
1.4 KiB
48 lines
1.4 KiB
4 years ago
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/*:nodoc:*
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* class ActionAppendConstant
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*
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* This stores a list, and appends the value specified by
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* the const keyword argument to the list.
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* (Note that the const keyword argument defaults to null.)
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* The 'appendConst' action is typically useful when multiple
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* arguments need to store constants to the same list.
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*
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* This class inherited from [[Action]]
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**/
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'use strict';
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var util = require('util');
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var Action = require('../../action');
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/*:nodoc:*
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* new ActionAppendConstant(options)
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* - options (object): options hash see [[Action.new]]
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*
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**/
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var ActionAppendConstant = module.exports = function ActionAppendConstant(options) {
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options = options || {};
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options.nargs = 0;
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if (typeof options.constant === 'undefined') {
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throw new Error('constant option is required for appendAction');
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}
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Action.call(this, options);
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};
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util.inherits(ActionAppendConstant, Action);
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/*:nodoc:*
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* ActionAppendConstant#call(parser, namespace, values, optionString) -> Void
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* - parser (ArgumentParser): current parser
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* - namespace (Namespace): namespace for output data
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* - values (Array): parsed values
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* - optionString (Array): input option string(not parsed)
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*
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* Call the action. Save result in namespace object
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**/
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ActionAppendConstant.prototype.call = function (parser, namespace) {
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var items = [].concat(namespace[this.dest] || []);
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items.push(this.constant);
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namespace.set(this.dest, items);
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};
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