Merge pull request #82 from tomxtobin/optional-new

Make `new` optional when instantiating ArgumentParser

Author: Vitaly Puzrin

lib/argument_parser.js

@@ -53,6 +53,9 @@ var Namespace = require('./namespace');
  * [1]:http://docs.python.org/dev/library/argparse.html#argumentparser-objects
  **/
 var ArgumentParser = module.exports = function ArgumentParser(options) {
+  if (!(this instanceof ArgumentParser)) {
+    return new ArgumentParser(options);
+  }
   var self = this;
   options = options || {};
 

test/base.js

@@ -244,4 +244,12 @@ describe('base', function () {
       args = parser.parseArgs([ '-y' ]);
     });
   });
+
+  it('should support instantiation without new', function () {
+    assert.doesNotThrow(function () {
+      /* jshint -W064 */
+      parser = ArgumentParser({debug: true});
+      /* jshint +W064 */
+    });
+  });
 });