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Property	Old Value	New Value
File Mode	null	100755

				#!/usr/bin/env php
				<?php

				require_once dirname(__FILE__).'/../__init_script__.php';

				$args = new PhutilArgumentParser($argv);
				$args->setTagline(pht('test context-free grammars'));
				$args->setSynopsis(<<<EOHELP
				lipsum.php __class__
				Generate output from a named context-free grammar.
				EOHELP
				);
				$args->parseStandardArguments();
				$args->parse(
				array(
				array(
				'name' => 'class',
				'wildcard' => true,
				),
				));

				$class = $args->getArg('class');
				if (count($class) !== 1) {
				$args->printHelpAndExit();
				}
				$class = reset($class);

				$symbols = id(new PhutilClassMapQuery())
				->setAncestorClass('PhutilContextFreeGrammar')
				->execute();

				$symbols = ipull($symbols, 'name', 'name');

				if (empty($symbols[$class])) {
				$available = implode(', ', array_keys($symbols));
				throw new PhutilArgumentUsageException(
				pht(
				"Class '%s' is not a defined, concrete subclass of %s. ".
				"Available classes are: %s",
				$class,
				'PhutilContextFreeGrammar',
				$available));
				}

				$object = newv($class, array());
				echo $object->generate()."\n";