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47 lines
1.4 KiB
47 lines
1.4 KiB
/*: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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