first commit for Carnet NC server

57 files changed, 10261 insertions, 0 deletions

diff --git a/vendor/symfony/polyfill-ctype/Ctype.php b/vendor/symfony/polyfill-ctype/Ctype.php
new file mode 100644
index 0000000..58414dc
--- /dev/null
+++ b/vendor/symfony/polyfill-ctype/Ctype.php
@@ -0,0 +1,227 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Polyfill\Ctype;
+
+/**
+ * Ctype implementation through regex.
+ *
+ * @internal
+ *
+ * @author Gert de Pagter <BackEndTea@gmail.com>
+ */
+final class Ctype
+{
+    /**
+     * Returns TRUE if every character in text is either a letter or a digit, FALSE otherwise.
+     *
+     * @see https://php.net/ctype-alnum
+     *
+     * @param string|int $text
+     *
+     * @return bool
+     */
+    public static function ctype_alnum($text)
+    {
+        $text = self::convert_int_to_char_for_ctype($text);
+
+        return \is_string($text) && '' !== $text && !preg_match('/[^A-Za-z0-9]/', $text);
+    }
+
+    /**
+     * Returns TRUE if every character in text is a letter, FALSE otherwise.
+     *
+     * @see https://php.net/ctype-alpha
+     *
+     * @param string|int $text
+     *
+     * @return bool
+     */
+    public static function ctype_alpha($text)
+    {
+        $text = self::convert_int_to_char_for_ctype($text);
+
+        return \is_string($text) && '' !== $text && !preg_match('/[^A-Za-z]/', $text);
+    }
+
+    /**
+     * Returns TRUE if every character in text is a control character from the current locale, FALSE otherwise.
+     *
+     * @see https://php.net/ctype-cntrl
+     *
+     * @param string|int $text
+     *
+     * @return bool
+     */
+    public static function ctype_cntrl($text)
+    {
+        $text = self::convert_int_to_char_for_ctype($text);
+
+        return \is_string($text) && '' !== $text && !preg_match('/[^\x00-\x1f\x7f]/', $text);
+    }
+
+    /**
+     * Returns TRUE if every character in the string text is a decimal digit, FALSE otherwise.
+     *
+     * @see https://php.net/ctype-digit
+     *
+     * @param string|int $text
+     *
+     * @return bool
+     */
+    public static function ctype_digit($text)
+    {
+        $text = self::convert_int_to_char_for_ctype($text);
+
+        return \is_string($text) && '' !== $text && !preg_match('/[^0-9]/', $text);
+    }
+
+    /**
+     * Returns TRUE if every character in text is printable and actually creates visible output (no white space), FALSE otherwise.
+     *
+     * @see https://php.net/ctype-graph
+     *
+     * @param string|int $text
+     *
+     * @return bool
+     */
+    public static function ctype_graph($text)
+    {
+        $text = self::convert_int_to_char_for_ctype($text);
+
+        return \is_string($text) && '' !== $text && !preg_match('/[^!-~]/', $text);
+    }
+
+    /**
+     * Returns TRUE if every character in text is a lowercase letter.
+     *
+     * @see https://php.net/ctype-lower
+     *
+     * @param string|int $text
+     *
+     * @return bool
+     */
+    public static function ctype_lower($text)
+    {
+        $text = self::convert_int_to_char_for_ctype($text);
+
+        return \is_string($text) && '' !== $text && !preg_match('/[^a-z]/', $text);
+    }
+
+    /**
+     * Returns TRUE if every character in text will actually create output (including blanks). Returns FALSE if text contains control characters or characters that do not have any output or control function at all.
+     *
+     * @see https://php.net/ctype-print
+     *
+     * @param string|int $text
+     *
+     * @return bool
+     */
+    public static function ctype_print($text)
+    {
+        $text = self::convert_int_to_char_for_ctype($text);
+
+        return \is_string($text) && '' !== $text && !preg_match('/[^ -~]/', $text);
+    }
+
+    /**
+     * Returns TRUE if every character in text is printable, but neither letter, digit or blank, FALSE otherwise.
+     *
+     * @see https://php.net/ctype-punct
+     *
+     * @param string|int $text
+     *
+     * @return bool
+     */
+    public static function ctype_punct($text)
+    {
+        $text = self::convert_int_to_char_for_ctype($text);
+
+        return \is_string($text) && '' !== $text && !preg_match('/[^!-\/\:-@\[-`\{-~]/', $text);
+    }
+
+    /**
+     * Returns TRUE if every character in text creates some sort of white space, FALSE otherwise. Besides the blank character this also includes tab, vertical tab, line feed, carriage return and form feed characters.
+     *
+     * @see https://php.net/ctype-space
+     *
+     * @param string|int $text
+     *
+     * @return bool
+     */
+    public static function ctype_space($text)
+    {
+        $text = self::convert_int_to_char_for_ctype($text);
+
+        return \is_string($text) && '' !== $text && !preg_match('/[^\s]/', $text);
+    }
+
+    /**
+     * Returns TRUE if every character in text is an uppercase letter.
+     *
+     * @see https://php.net/ctype-upper
+     *
+     * @param string|int $text
+     *
+     * @return bool
+     */
+    public static function ctype_upper($text)
+    {
+        $text = self::convert_int_to_char_for_ctype($text);
+
+        return \is_string($text) && '' !== $text && !preg_match('/[^A-Z]/', $text);
+    }
+
+    /**
+     * Returns TRUE if every character in text is a hexadecimal 'digit', that is a decimal digit or a character from [A-Fa-f] , FALSE otherwise.
+     *
+     * @see https://php.net/ctype-xdigit
+     *
+     * @param string|int $text
+     *
+     * @return bool
+     */
+    public static function ctype_xdigit($text)
+    {
+        $text = self::convert_int_to_char_for_ctype($text);
+
+        return \is_string($text) && '' !== $text && !preg_match('/[^A-Fa-f0-9]/', $text);
+    }
+
+    /**
+     * Converts integers to their char versions according to normal ctype behaviour, if needed.
+     *
+     * If an integer between -128 and 255 inclusive is provided,
+     * it is interpreted as the ASCII value of a single character
+     * (negative values have 256 added in order to allow characters in the Extended ASCII range).
+     * Any other integer is interpreted as a string containing the decimal digits of the integer.
+     *
+     * @param string|int $int
+     *
+     * @return mixed
+     */
+    private static function convert_int_to_char_for_ctype($int)
+    {
+        if (!\is_int($int)) {
+            return $int;
+        }
+
+        if ($int < -128 || $int > 255) {
+            return (string) $int;
+        }
+
+        if ($int < 0) {
+            $int += 256;
+        }
+
+        return \chr($int);
+    }
+}
diff --git a/vendor/symfony/polyfill-ctype/LICENSE b/vendor/symfony/polyfill-ctype/LICENSE
new file mode 100644
index 0000000..ad399a7
--- /dev/null
+++ b/vendor/symfony/polyfill-ctype/LICENSE
@@ -0,0 +1,19 @@
+Copyright (c) 2018 Fabien Potencier
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished
+to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/vendor/symfony/polyfill-ctype/README.md b/vendor/symfony/polyfill-ctype/README.md
new file mode 100644
index 0000000..8add1ab
--- /dev/null
+++ b/vendor/symfony/polyfill-ctype/README.md
@@ -0,0 +1,12 @@
+Symfony Polyfill / Ctype
+========================
+
+This component provides `ctype_*` functions to users who run php versions without the ctype extension.
+
+More information can be found in the
+[main Polyfill README](https://github.com/symfony/polyfill/blob/master/README.md).
+
+License
+=======
+
+This library is released under the [MIT license](LICENSE).
diff --git a/vendor/symfony/polyfill-ctype/bootstrap.php b/vendor/symfony/polyfill-ctype/bootstrap.php
new file mode 100644
index 0000000..14d1d0f
--- /dev/null
+++ b/vendor/symfony/polyfill-ctype/bootstrap.php
@@ -0,0 +1,26 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+use Symfony\Polyfill\Ctype as p;
+
+if (!function_exists('ctype_alnum')) {
+    function ctype_alnum($text) { return p\Ctype::ctype_alnum($text); }
+    function ctype_alpha($text) { return p\Ctype::ctype_alpha($text); }
+    function ctype_cntrl($text) { return p\Ctype::ctype_cntrl($text); }
+    function ctype_digit($text) { return p\Ctype::ctype_digit($text); }
+    function ctype_graph($text) { return p\Ctype::ctype_graph($text); }
+    function ctype_lower($text) { return p\Ctype::ctype_lower($text); }
+    function ctype_print($text) { return p\Ctype::ctype_print($text); }
+    function ctype_punct($text) { return p\Ctype::ctype_punct($text); }
+    function ctype_space($text) { return p\Ctype::ctype_space($text); }
+    function ctype_upper($text) { return p\Ctype::ctype_upper($text); }
+    function ctype_xdigit($text) { return p\Ctype::ctype_xdigit($text); }
+}
diff --git a/vendor/symfony/polyfill-ctype/composer.json b/vendor/symfony/polyfill-ctype/composer.json
new file mode 100644
index 0000000..094f8d8
--- /dev/null
+++ b/vendor/symfony/polyfill-ctype/composer.json
@@ -0,0 +1,34 @@
+{
+    "name": "symfony/polyfill-ctype",
+    "type": "library",
+    "description": "Symfony polyfill for ctype functions",
+    "keywords": ["polyfill", "compatibility", "portable", "ctype"],
+    "homepage": "https://symfony.com",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Gert de Pagter",
+            "email": "BackEndTea@gmail.com"
+        },
+        {
+            "name": "Symfony Community",
+            "homepage": "https://symfony.com/contributors"
+        }
+    ],
+    "require": {
+        "php": ">=5.3.3"
+    },
+    "autoload": {
+        "psr-4": { "Symfony\\Polyfill\\Ctype\\": "" },
+        "files": [ "bootstrap.php" ]
+    },
+    "suggest": {
+        "ext-ctype": "For best performance"
+    },
+    "minimum-stability": "dev",
+    "extra": {
+        "branch-alias": {
+            "dev-master": "1.9-dev"
+        }
+    }
+}
diff --git a/vendor/symfony/yaml/.gitignore b/vendor/symfony/yaml/.gitignore
new file mode 100644
index 0000000..c49a5d8
--- /dev/null
+++ b/vendor/symfony/yaml/.gitignore
@@ -0,0 +1,3 @@
+vendor/
+composer.lock
+phpunit.xml
diff --git a/vendor/symfony/yaml/CHANGELOG.md b/vendor/symfony/yaml/CHANGELOG.md
new file mode 100644
index 0000000..70d392d
--- /dev/null
+++ b/vendor/symfony/yaml/CHANGELOG.md
@@ -0,0 +1,179 @@
+CHANGELOG
+=========
+
+4.0.0
+-----
+
+ * The behavior of the non-specific tag `!` is changed and now forces
+   non-evaluating your values.
+ * complex mappings will throw a `ParseException`
+ * support for the comma as a group separator for floats has been dropped, use
+   the underscore instead
+ * support for the `!!php/object` tag has been dropped, use the `!php/object`
+   tag instead
+ * duplicate mapping keys throw a `ParseException`
+ * non-string mapping keys throw a `ParseException`, use the `Yaml::PARSE_KEYS_AS_STRINGS`
+   flag to cast them to strings
+ * `%` at the beginning of an unquoted string throw a `ParseException`
+ * mappings with a colon (`:`) that is not followed by a whitespace throw a
+   `ParseException`
+ * the `Dumper::setIndentation()` method has been removed
+ * being able to pass boolean options to the `Yaml::parse()`, `Yaml::dump()`,
+   `Parser::parse()`, and `Dumper::dump()` methods to configure the behavior of
+   the parser and dumper is no longer supported, pass bitmask flags instead
+ * the constructor arguments of the `Parser` class have been removed
+ * the `Inline` class is internal and no longer part of the BC promise
+ * removed support for the `!str` tag, use the `!!str` tag instead
+ * added support for tagged scalars.
+
+   ```yml
+   Yaml::parse('!foo bar', Yaml::PARSE_CUSTOM_TAGS);
+   // returns TaggedValue('foo', 'bar');
+   ```
+
+3.4.0
+-----
+
+ * added support for parsing YAML files using the `Yaml::parseFile()` or `Parser::parseFile()` method
+
+ * the `Dumper`, `Parser`, and `Yaml` classes are marked as final
+
+ * Deprecated the `!php/object:` tag which will be replaced by the
+   `!php/object` tag (without the colon) in 4.0.
+
+ * Deprecated the `!php/const:` tag which will be replaced by the
+   `!php/const` tag (without the colon) in 4.0.
+
+ * Support for the `!str` tag is deprecated, use the `!!str` tag instead.
+
+ * Deprecated using the non-specific tag `!` as its behavior will change in 4.0.
+   It will force non-evaluating your values in 4.0. Use plain integers or `!!float` instead.
+
+3.3.0
+-----
+
+ * Starting an unquoted string with a question mark followed by a space is
+   deprecated and will throw a `ParseException` in Symfony 4.0.
+
+ * Deprecated support for implicitly parsing non-string mapping keys as strings.
+   Mapping keys that are no strings will lead to a `ParseException` in Symfony
+   4.0. Use quotes to opt-in for keys to be parsed as strings.
+
+   Before:
+
+   ```php
+   $yaml = <<<YAML
+   null: null key
+   true: boolean true
+   2.0: float key
+   YAML;
+
+   Yaml::parse($yaml);
+   ```
+
+   After:
+
+   ```php
+
+   $yaml = <<<YAML
+   "null": null key
+   "true": boolean true
+   "2.0": float key
+   YAML;
+
+   Yaml::parse($yaml);
+   ```
+
+ * Omitted mapping values will be parsed as `null`.
+
+ * Omitting the key of a mapping is deprecated and will throw a `ParseException` in Symfony 4.0.
+
+ * Added support for dumping empty PHP arrays as YAML sequences:
+
+   ```php
+   Yaml::dump([], 0, 0, Yaml::DUMP_EMPTY_ARRAY_AS_SEQUENCE);
+   ```
+
+3.2.0
+-----
+
+ * Mappings with a colon (`:`) that is not followed by a whitespace are deprecated
+   when the mapping key is not quoted and will lead to a `ParseException` in
+   Symfony 4.0 (e.g. `foo:bar` must be `foo: bar`).
+
+ * Added support for parsing PHP constants:
+
+   ```php
+   Yaml::parse('!php/const:PHP_INT_MAX', Yaml::PARSE_CONSTANT);
+   ```
+
+ * Support for silently ignoring duplicate mapping keys in YAML has been
+   deprecated and will lead to a `ParseException` in Symfony 4.0.
+
+3.1.0
+-----
+
+ * Added support to dump `stdClass` and `ArrayAccess` objects as YAML mappings
+   through the `Yaml::DUMP_OBJECT_AS_MAP` flag.
+
+ * Strings that are not UTF-8 encoded will be dumped as base64 encoded binary
+   data.
+
+ * Added support for dumping multi line strings as literal blocks.
+
+ * Added support for parsing base64 encoded binary data when they are tagged
+   with the `!!binary` tag.
+
+ * Added support for parsing timestamps as `\DateTime` objects:
+
+   ```php
+   Yaml::parse('2001-12-15 21:59:43.10 -5', Yaml::PARSE_DATETIME);
+   ```
+
+ * `\DateTime` and `\DateTimeImmutable` objects are dumped as YAML timestamps.
+
+ * Deprecated usage of `%` at the beginning of an unquoted string.
+
+ * Added support for customizing the YAML parser behavior through an optional bit field:
+
+   ```php
+   Yaml::parse('{ "foo": "bar", "fiz": "cat" }', Yaml::PARSE_EXCEPTION_ON_INVALID_TYPE | Yaml::PARSE_OBJECT | Yaml::PARSE_OBJECT_FOR_MAP);
+   ```
+
+ * Added support for customizing the dumped YAML string through an optional bit field:
+
+   ```php
+   Yaml::dump(array('foo' => new A(), 'bar' => 1), 0, 0, Yaml::DUMP_EXCEPTION_ON_INVALID_TYPE | Yaml::DUMP_OBJECT);
+   ```
+
+3.0.0
+-----
+
+ * Yaml::parse() now throws an exception when a blackslash is not escaped
+   in double-quoted strings
+
+2.8.0
+-----
+
+ * Deprecated usage of a colon in an unquoted mapping value
+ * Deprecated usage of @, \`, | and > at the beginning of an unquoted string
+ * When surrounding strings with double-quotes, you must now escape `\` characters. Not
+   escaping those characters (when surrounded by double-quotes) is deprecated.
+
+   Before:
+
+   ```yml
+   class: "Foo\Var"
+   ```
+
+   After:
+
+   ```yml
+   class: "Foo\\Var"
+   ```
+
+2.1.0
+-----
+
+ * Yaml::parse() does not evaluate loaded files as PHP files by default
+   anymore (call Yaml::enablePhpParsing() to get back the old behavior)
diff --git a/vendor/symfony/yaml/Command/LintCommand.php b/vendor/symfony/yaml/Command/LintCommand.php
new file mode 100644
index 0000000..56bc96f
--- /dev/null
+++ b/vendor/symfony/yaml/Command/LintCommand.php
@@ -0,0 +1,250 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Yaml\Command;
+
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Exception\InvalidArgumentException;
+use Symfony\Component\Console\Exception\RuntimeException;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+use Symfony\Component\Yaml\Exception\ParseException;
+use Symfony\Component\Yaml\Parser;
+use Symfony\Component\Yaml\Yaml;
+
+/**
+ * Validates YAML files syntax and outputs encountered errors.
+ *
+ * @author Grégoire Pineau <lyrixx@lyrixx.info>
+ * @author Robin Chalas <robin.chalas@gmail.com>
+ */
+class LintCommand extends Command
+{
+    protected static $defaultName = 'lint:yaml';
+
+    private $parser;
+    private $format;
+    private $displayCorrectFiles;
+    private $directoryIteratorProvider;
+    private $isReadableProvider;
+
+    public function __construct(string $name = null, callable $directoryIteratorProvider = null, callable $isReadableProvider = null)
+    {
+        parent::__construct($name);
+
+        $this->directoryIteratorProvider = $directoryIteratorProvider;
+        $this->isReadableProvider = $isReadableProvider;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function configure()
+    {
+        $this
+            ->setDescription('Lints a file and outputs encountered errors')
+            ->addArgument('filename', null, 'A file or a directory or STDIN')
+            ->addOption('format', null, InputOption::VALUE_REQUIRED, 'The output format', 'txt')
+            ->addOption('parse-tags', null, InputOption::VALUE_NONE, 'Parse custom tags')
+            ->setHelp(<<<EOF
+The <info>%command.name%</info> command lints a YAML file and outputs to STDOUT
+the first encountered syntax error.
+
+You can validates YAML contents passed from STDIN:
+
+  <info>cat filename | php %command.full_name%</info>
+
+You can also validate the syntax of a file:
+
+  <info>php %command.full_name% filename</info>
+
+Or of a whole directory:
+
+  <info>php %command.full_name% dirname</info>
+  <info>php %command.full_name% dirname --format=json</info>
+
+EOF
+            )
+        ;
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output)
+    {
+        $io = new SymfonyStyle($input, $output);
+        $filename = $input->getArgument('filename');
+        $this->format = $input->getOption('format');
+        $this->displayCorrectFiles = $output->isVerbose();
+        $flags = $input->getOption('parse-tags') ? Yaml::PARSE_CUSTOM_TAGS : 0;
+
+        if (!$filename) {
+            if (!$stdin = $this->getStdin()) {
+                throw new RuntimeException('Please provide a filename or pipe file content to STDIN.');
+            }
+
+            return $this->display($io, array($this->validate($stdin, $flags)));
+        }
+
+        if (!$this->isReadable($filename)) {
+            throw new RuntimeException(sprintf('File or directory "%s" is not readable.', $filename));
+        }
+
+        $filesInfo = array();
+        foreach ($this->getFiles($filename) as $file) {
+            $filesInfo[] = $this->validate(file_get_contents($file), $flags, $file);
+        }
+
+        return $this->display($io, $filesInfo);
+    }
+
+    private function validate($content, $flags, $file = null)
+    {
+        $prevErrorHandler = set_error_handler(function ($level, $message, $file, $line) use (&$prevErrorHandler) {
+            if (E_USER_DEPRECATED === $level) {
+                throw new ParseException($message, $this->getParser()->getRealCurrentLineNb() + 1);
+            }
+
+            return $prevErrorHandler ? $prevErrorHandler($level, $message, $file, $line) : false;
+        });
+
+        try {
+            $this->getParser()->parse($content, Yaml::PARSE_CONSTANT | $flags);
+        } catch (ParseException $e) {
+            return array('file' => $file, 'line' => $e->getParsedLine(), 'valid' => false, 'message' => $e->getMessage());
+        } finally {
+            restore_error_handler();
+        }
+
+        return array('file' => $file, 'valid' => true);
+    }
+
+    private function display(SymfonyStyle $io, array $files)
+    {
+        switch ($this->format) {
+            case 'txt':
+                return $this->displayTxt($io, $files);
+            case 'json':
+                return $this->displayJson($io, $files);
+            default:
+                throw new InvalidArgumentException(sprintf('The format "%s" is not supported.', $this->format));
+        }
+    }
+
+    private function displayTxt(SymfonyStyle $io, array $filesInfo)
+    {
+        $countFiles = \count($filesInfo);
+        $erroredFiles = 0;
+
+        foreach ($filesInfo as $info) {
+            if ($info['valid'] && $this->displayCorrectFiles) {
+                $io->comment('<info>OK</info>'.($info['file'] ? sprintf(' in %s', $info['file']) : ''));
+            } elseif (!$info['valid']) {
+                ++$erroredFiles;
+                $io->text('<error> ERROR </error>'.($info['file'] ? sprintf(' in %s', $info['file']) : ''));
+                $io->text(sprintf('<error> >> %s</error>', $info['message']));
+            }
+        }
+
+        if (0 === $erroredFiles) {
+            $io->success(sprintf('All %d YAML files contain valid syntax.', $countFiles));
+        } else {
+            $io->warning(sprintf('%d YAML files have valid syntax and %d contain errors.', $countFiles - $erroredFiles, $erroredFiles));
+        }
+
+        return min($erroredFiles, 1);
+    }
+
+    private function displayJson(SymfonyStyle $io, array $filesInfo)
+    {
+        $errors = 0;
+
+        array_walk($filesInfo, function (&$v) use (&$errors) {
+            $v['file'] = (string) $v['file'];
+            if (!$v['valid']) {
+                ++$errors;
+            }
+        });
+
+        $io->writeln(json_encode($filesInfo, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES));
+
+        return min($errors, 1);
+    }
+
+    private function getFiles($fileOrDirectory)
+    {
+        if (is_file($fileOrDirectory)) {
+            yield new \SplFileInfo($fileOrDirectory);
+
+            return;
+        }
+
+        foreach ($this->getDirectoryIterator($fileOrDirectory) as $file) {
+            if (!\in_array($file->getExtension(), array('yml', 'yaml'))) {
+                continue;
+            }
+
+            yield $file;
+        }
+    }
+
+    private function getStdin()
+    {
+        if (0 !== ftell(STDIN)) {
+            return;
+        }
+
+        $inputs = '';
+        while (!feof(STDIN)) {
+            $inputs .= fread(STDIN, 1024);
+        }
+
+        return $inputs;
+    }
+
+    private function getParser()
+    {
+        if (!$this->parser) {
+            $this->parser = new Parser();
+        }
+
+        return $this->parser;
+    }
+
+    private function getDirectoryIterator($directory)
+    {
+        $default = function ($directory) {
+            return new \RecursiveIteratorIterator(
+                new \RecursiveDirectoryIterator($directory, \FilesystemIterator::SKIP_DOTS | \FilesystemIterator::FOLLOW_SYMLINKS),
+                \RecursiveIteratorIterator::LEAVES_ONLY
+            );
+        };
+
+        if (null !== $this->directoryIteratorProvider) {
+            return \call_user_func($this->directoryIteratorProvider, $directory, $default);
+        }
+
+        return $default($directory);
+    }
+
+    private function isReadable($fileOrDirectory)
+    {
+        $default = function ($fileOrDirectory) {
+            return is_readable($fileOrDirectory);
+        };
+
+        if (null !== $this->isReadableProvider) {
+            return \call_user_func($this->isReadableProvider, $fileOrDirectory, $default);
+        }
+
+        return $default($fileOrDirectory);
+    }
+}
diff --git a/vendor/symfony/yaml/Dumper.php b/vendor/symfony/yaml/Dumper.php
new file mode 100644
index 0000000..fdd34b6
--- /dev/null
+++ b/vendor/symfony/yaml/Dumper.php
@@ -0,0 +1,97 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Yaml;
+
+/**
+ * Dumper dumps PHP variables to YAML strings.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @final
+ */
+class Dumper
+{
+    /**
+     * The amount of spaces to use for indentation of nested nodes.
+     *
+     * @var int
+     */
+    protected $indentation;
+
+    public function __construct(int $indentation = 4)
+    {
+        if ($indentation < 1) {
+            throw new \InvalidArgumentException('The indentation must be greater than zero.');
+        }
+
+        $this->indentation = $indentation;
+    }
+
+    /**
+     * Dumps a PHP value to YAML.
+     *
+     * @param mixed $input  The PHP value
+     * @param int   $inline The level where you switch to inline YAML
+     * @param int   $indent The level of indentation (used internally)
+     * @param int   $flags  A bit field of Yaml::DUMP_* constants to customize the dumped YAML string
+     *
+     * @return string The YAML representation of the PHP value
+     */
+    public function dump($input, int $inline = 0, int $indent = 0, int $flags = 0): string
+    {
+        $output = '';
+        $prefix = $indent ? str_repeat(' ', $indent) : '';
+        $dumpObjectAsInlineMap = true;
+
+        if (Yaml::DUMP_OBJECT_AS_MAP & $flags && ($input instanceof \ArrayObject || $input instanceof \stdClass)) {
+            $dumpObjectAsInlineMap = empty((array) $input);
+        }
+
+        if ($inline <= 0 || (!\is_array($input) && $dumpObjectAsInlineMap) || empty($input)) {
+            $output .= $prefix.Inline::dump($input, $flags);
+        } else {
+            $dumpAsMap = Inline::isHash($input);
+
+            foreach ($input as $key => $value) {
+                if ($inline >= 1 && Yaml::DUMP_MULTI_LINE_LITERAL_BLOCK & $flags && \is_string($value) && false !== strpos($value, "\n") && false === strpos($value, "\r\n")) {
+                    // If the first line starts with a space character, the spec requires a blockIndicationIndicator
+                    // http://www.yaml.org/spec/1.2/spec.html#id2793979
+                    $blockIndentationIndicator = (' ' === substr($value, 0, 1)) ? (string) $this->indentation : '';
+                    $output .= sprintf("%s%s%s |%s\n", $prefix, $dumpAsMap ? Inline::dump($key, $flags).':' : '-', '', $blockIndentationIndicator);
+
+                    foreach (preg_split('/\n|\r\n/', $value) as $row) {
+                        $output .= sprintf("%s%s%s\n", $prefix, str_repeat(' ', $this->indentation), $row);
+                    }
+
+                    continue;
+                }
+
+                $dumpObjectAsInlineMap = true;
+
+                if (Yaml::DUMP_OBJECT_AS_MAP & $flags && ($value instanceof \ArrayObject || $value instanceof \stdClass)) {
+                    $dumpObjectAsInlineMap = empty((array) $value);
+                }
+
+                $willBeInlined = $inline - 1 <= 0 || !\is_array($value) && $dumpObjectAsInlineMap || empty($value);
+
+                $output .= sprintf('%s%s%s%s',
+                    $prefix,
+                    $dumpAsMap ? Inline::dump($key, $flags).':' : '-',
+                    $willBeInlined ? ' ' : "\n",
+                    $this->dump($value, $inline - 1, $willBeInlined ? 0 : $indent + $this->indentation, $flags)
+                ).($willBeInlined ? "\n" : '');
+            }
+        }
+
+        return $output;
+    }
+}
diff --git a/vendor/symfony/yaml/Escaper.php b/vendor/symfony/yaml/Escaper.php
new file mode 100644
index 0000000..4b2559e
--- /dev/null
+++ b/vendor/symfony/yaml/Escaper.php
@@ -0,0 +1,101 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Yaml;
+
+/**
+ * Escaper encapsulates escaping rules for single and double-quoted
+ * YAML strings.
+ *
+ * @author Matthew Lewinski <matthew@lewinski.org>
+ *
+ * @internal
+ */
+class Escaper
+{
+    // Characters that would cause a dumped string to require double quoting.
+    const REGEX_CHARACTER_TO_ESCAPE = "[\\x00-\\x1f]|\xc2\x85|\xc2\xa0|\xe2\x80\xa8|\xe2\x80\xa9";
+
+    // Mapping arrays for escaping a double quoted string. The backslash is
+    // first to ensure proper escaping because str_replace operates iteratively
+    // on the input arrays. This ordering of the characters avoids the use of strtr,
+    // which performs more slowly.
+    private static $escapees = array('\\', '\\\\', '\\"', '"',
+                                     "\x00",  "\x01",  "\x02",  "\x03",  "\x04",  "\x05",  "\x06",  "\x07",
+                                     "\x08",  "\x09",  "\x0a",  "\x0b",  "\x0c",  "\x0d",  "\x0e",  "\x0f",
+                                     "\x10",  "\x11",  "\x12",  "\x13",  "\x14",  "\x15",  "\x16",  "\x17",
+                                     "\x18",  "\x19",  "\x1a",  "\x1b",  "\x1c",  "\x1d",  "\x1e",  "\x1f",
+                                     "\xc2\x85", "\xc2\xa0", "\xe2\x80\xa8", "\xe2\x80\xa9",
+                               );
+    private static $escaped = array('\\\\', '\\"', '\\\\', '\\"',
+                                     '\\0',   '\\x01', '\\x02', '\\x03', '\\x04', '\\x05', '\\x06', '\\a',
+                                     '\\b',   '\\t',   '\\n',   '\\v',   '\\f',   '\\r',   '\\x0e', '\\x0f',
+                                     '\\x10', '\\x11', '\\x12', '\\x13', '\\x14', '\\x15', '\\x16', '\\x17',
+                                     '\\x18', '\\x19', '\\x1a', '\\e',   '\\x1c', '\\x1d', '\\x1e', '\\x1f',
+                                     '\\N', '\\_', '\\L', '\\P',
+                              );
+
+    /**
+     * Determines if a PHP value would require double quoting in YAML.
+     *
+     * @param string $value A PHP value
+     *
+     * @return bool True if the value would require double quotes
+     */
+    public static function requiresDoubleQuoting(string $value): bool
+    {
+        return 0 < preg_match('/'.self::REGEX_CHARACTER_TO_ESCAPE.'/u', $value);
+    }
+
+    /**
+     * Escapes and surrounds a PHP value with double quotes.
+     *
+     * @param string $value A PHP value
+     *
+     * @return string The quoted, escaped string
+     */
+    public static function escapeWithDoubleQuotes(string $value): string
+    {
+        return sprintf('"%s"', str_replace(self::$escapees, self::$escaped, $value));
+    }
+
+    /**
+     * Determines if a PHP value would require single quoting in YAML.
+     *
+     * @param string $value A PHP value
+     *
+     * @return bool True if the value would require single quotes
+     */
+    public static function requiresSingleQuoting(string $value): bool
+    {
+        // Determines if a PHP value is entirely composed of a value that would
+        // require single quoting in YAML.
+        if (\in_array(strtolower($value), array('null', '~', 'true', 'false', 'y', 'n', 'yes', 'no', 'on', 'off'))) {
+            return true;
+        }
+
+        // Determines if the PHP value contains any single characters that would
+        // cause it to require single quoting in YAML.
+        return 0 < preg_match('/[ \s \' " \: \{ \} \[ \] , & \* \# \?] | \A[ \- ? | < > = ! % @ ` ]/x', $value);
+    }
+
+    /**
+     * Escapes and surrounds a PHP value with single quotes.
+     *
+     * @param string $value A PHP value
+     *
+     * @return string The quoted, escaped string
+     */
+    public static function escapeWithSingleQuotes(string $value): string
+    {
+        return sprintf("'%s'", str_replace('\'', '\'\'', $value));
+    }
+}
diff --git a/vendor/symfony/yaml/Exception/DumpException.php b/vendor/symfony/yaml/Exception/DumpException.php
new file mode 100644
index 0000000..cce972f
--- /dev/null
+++ b/vendor/symfony/yaml/Exception/DumpException.php
@@ -0,0 +1,21 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Yaml\Exception;
+
+/**
+ * Exception class thrown when an error occurs during dumping.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class DumpException extends RuntimeException
+{
+}
diff --git a/vendor/symfony/yaml/Exception/ExceptionInterface.php b/vendor/symfony/yaml/Exception/ExceptionInterface.php
new file mode 100644
index 0000000..ad850ee
--- /dev/null
+++ b/vendor/symfony/yaml/Exception/ExceptionInterface.php
@@ -0,0 +1,21 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Yaml\Exception;
+
+/**
+ * Exception interface for all exceptions thrown by the component.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+interface ExceptionInterface
+{
+}
diff --git a/vendor/symfony/yaml/Exception/ParseException.php b/vendor/symfony/yaml/Exception/ParseException.php
new file mode 100644
index 0000000..95efe68
--- /dev/null
+++ b/vendor/symfony/yaml/Exception/ParseException.php
@@ -0,0 +1,139 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Yaml\Exception;
+
+/**
+ * Exception class thrown when an error occurs during parsing.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class ParseException extends RuntimeException
+{
+    private $parsedFile;
+    private $parsedLine;
+    private $snippet;
+    private $rawMessage;
+
+    /**
+     * @param string          $message    The error message
+     * @param int             $parsedLine The line where the error occurred
+     * @param string|null     $snippet    The snippet of code near the problem
+     * @param string|null     $parsedFile The file name where the error occurred
+     * @param \Exception|null $previous   The previous exception
+     */
+    public function __construct(string $message, int $parsedLine = -1, string $snippet = null, string $parsedFile = null, \Exception $previous = null)
+    {
+        $this->parsedFile = $parsedFile;
+        $this->parsedLine = $parsedLine;
+        $this->snippet = $snippet;
+        $this->rawMessage = $message;
+
+        $this->updateRepr();
+
+        parent::__construct($this->message, 0, $previous);
+    }
+
+    /**
+     * Gets the snippet of code near the error.
+     *
+     * @return string The snippet of code
+     */
+    public function getSnippet()
+    {
+        return $this->snippet;
+    }
+
+    /**
+     * Sets the snippet of code near the error.
+     *
+     * @param string $snippet The code snippet
+     */
+    public function setSnippet($snippet)
+    {
+        $this->snippet = $snippet;
+
+        $this->updateRepr();
+    }
+
+    /**
+     * Gets the filename where the error occurred.
+     *
+     * This method returns null if a string is parsed.
+     *
+     * @return string The filename
+     */
+    public function getParsedFile()
+    {
+        return $this->parsedFile;
+    }
+
+    /**
+     * Sets the filename where the error occurred.
+     *
+     * @param string $parsedFile The filename
+     */
+    public function setParsedFile($parsedFile)
+    {
+        $this->parsedFile = $parsedFile;
+
+        $this->updateRepr();
+    }
+
+    /**
+     * Gets the line where the error occurred.
+     *
+     * @return int The file line
+     */
+    public function getParsedLine()
+    {
+        return $this->parsedLine;
+    }
+
+    /**
+     * Sets the line where the error occurred.
+     *
+     * @param int $parsedLine The file line
+     */
+    public function setParsedLine($parsedLine)
+    {
+        $this->parsedLine = $parsedLine;
+
+        $this->updateRepr();
+    }
+
+    private function updateRepr()
+    {
+        $this->message = $this->rawMessage;
+
+        $dot = false;
+        if ('.' === substr($this->message, -1)) {
+            $this->message = substr($this->message, 0, -1);
+            $dot = true;
+        }
+
+        if (null !== $this->parsedFile) {
+            $this->message .= sprintf(' in %s', json_encode($this->parsedFile, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE));
+        }
+
+        if ($this->parsedLine >= 0) {
+            $this->message .= sprintf(' at line %d', $this->parsedLine);
+        }
+
+        if ($this->snippet) {
+            $this->message .= sprintf(' (near "%s")', $this->snippet);
+        }
+
+        if ($dot) {
+            $this->message .= '.';
+        }
+    }
+}
diff --git a/vendor/symfony/yaml/Exception/RuntimeException.php b/vendor/symfony/yaml/Exception/RuntimeException.php
new file mode 100644
index 0000000..3f36b73
--- /dev/null
+++ b/vendor/symfony/yaml/Exception/RuntimeException.php
@@ -0,0 +1,21 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Yaml\Exception;
+
+/**
+ * Exception class thrown when an error occurs during parsing.
+ *
+ * @author Romain Neutron <imprec@gmail.com>
+ */
+class RuntimeException extends \RuntimeException implements ExceptionInterface
+{
+}
diff --git a/vendor/symfony/yaml/Inline.php b/vendor/symfony/yaml/Inline.php
new file mode 100644
index 0000000..261d618
--- /dev/null
+++ b/vendor/symfony/yaml/Inline.php
@@ -0,0 +1,744 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Yaml;
+
+use Symfony\Component\Yaml\Exception\DumpException;
+use Symfony\Component\Yaml\Exception\ParseException;
+use Symfony\Component\Yaml\Tag\TaggedValue;
+
+/**
+ * Inline implements a YAML parser/dumper for the YAML inline syntax.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @internal
+ */
+class Inline
+{
+    const REGEX_QUOTED_STRING = '(?:"([^"\\\\]*+(?:\\\\.[^"\\\\]*+)*+)"|\'([^\']*+(?:\'\'[^\']*+)*+)\')';
+
+    public static $parsedLineNumber = -1;
+    public static $parsedFilename;
+
+    private static $exceptionOnInvalidType = false;
+    private static $objectSupport = false;
+    private static $objectForMap = false;
+    private static $constantSupport = false;
+
+    /**
+     * @param int         $flags
+     * @param int|null    $parsedLineNumber
+     * @param string|null $parsedFilename
+     */
+    public static function initialize($flags, $parsedLineNumber = null, $parsedFilename = null)
+    {
+        self::$exceptionOnInvalidType = (bool) (Yaml::PARSE_EXCEPTION_ON_INVALID_TYPE & $flags);
+        self::$objectSupport = (bool) (Yaml::PARSE_OBJECT & $flags);
+        self::$objectForMap = (bool) (Yaml::PARSE_OBJECT_FOR_MAP & $flags);
+        self::$constantSupport = (bool) (Yaml::PARSE_CONSTANT & $flags);
+        self::$parsedFilename = $parsedFilename;
+
+        if (null !== $parsedLineNumber) {
+            self::$parsedLineNumber = $parsedLineNumber;
+        }
+    }
+
+    /**
+     * Converts a YAML string to a PHP value.
+     *
+     * @param string $value      A YAML string
+     * @param int    $flags      A bit field of PARSE_* constants to customize the YAML parser behavior
+     * @param array  $references Mapping of variable names to values
+     *
+     * @return mixed A PHP value
+     *
+     * @throws ParseException
+     */
+    public static function parse(string $value = null, int $flags = 0, array $references = array())
+    {
+        self::initialize($flags);
+
+        $value = trim($value);
+
+        if ('' === $value) {
+            return '';
+        }
+
+        if (2 /* MB_OVERLOAD_STRING */ & (int) ini_get('mbstring.func_overload')) {
+            $mbEncoding = mb_internal_encoding();
+            mb_internal_encoding('ASCII');
+        }
+
+        $i = 0;
+        $tag = self::parseTag($value, $i, $flags);
+        switch ($value[$i]) {
+            case '[':
+                $result = self::parseSequence($value, $flags, $i, $references);
+                ++$i;
+                break;
+            case '{':
+                $result = self::parseMapping($value, $flags, $i, $references);
+                ++$i;
+                break;
+            default:
+                $result = self::parseScalar($value, $flags, null, $i, null === $tag, $references);
+        }
+
+        if (null !== $tag && '' !== $tag) {
+            return new TaggedValue($tag, $result);
+        }
+
+        // some comments are allowed at the end
+        if (preg_replace('/\s+#.*$/A', '', substr($value, $i))) {
+            throw new ParseException(sprintf('Unexpected characters near "%s".', substr($value, $i)), self::$parsedLineNumber + 1, $value, self::$parsedFilename);
+        }
+
+        if (isset($mbEncoding)) {
+            mb_internal_encoding($mbEncoding);
+        }
+
+        return $result;
+    }
+
+    /**
+     * Dumps a given PHP variable to a YAML string.
+     *
+     * @param mixed $value The PHP variable to convert
+     * @param int   $flags A bit field of Yaml::DUMP_* constants to customize the dumped YAML string
+     *
+     * @return string The YAML string representing the PHP value
+     *
+     * @throws DumpException When trying to dump PHP resource
+     */
+    public static function dump($value, int $flags = 0): string
+    {
+        switch (true) {
+            case \is_resource($value):
+                if (Yaml::DUMP_EXCEPTION_ON_INVALID_TYPE & $flags) {
+                    throw new DumpException(sprintf('Unable to dump PHP resources in a YAML file ("%s").', get_resource_type($value)));
+                }
+
+                return 'null';
+            case $value instanceof \DateTimeInterface:
+                return $value->format('c');
+            case \is_object($value):
+                if ($value instanceof TaggedValue) {
+                    return '!'.$value->getTag().' '.self::dump($value->getValue(), $flags);
+                }
+
+                if (Yaml::DUMP_OBJECT & $flags) {
+                    return '!php/object '.self::dump(serialize($value));
+                }
+
+                if (Yaml::DUMP_OBJECT_AS_MAP & $flags && ($value instanceof \stdClass || $value instanceof \ArrayObject)) {
+                    $output = array();
+
+                    foreach ($value as $key => $val) {
+                        $output[] = sprintf('%s: %s', self::dump($key, $flags), self::dump($val, $flags));
+                    }
+
+                    return sprintf('{ %s }', implode(', ', $output));
+                }
+
+                if (Yaml::DUMP_EXCEPTION_ON_INVALID_TYPE & $flags) {
+                    throw new DumpException('Object support when dumping a YAML file has been disabled.');
+                }
+
+                return 'null';
+            case \is_array($value):
+                return self::dumpArray($value, $flags);
+            case null === $value:
+                return 'null';
+            case true === $value:
+                return 'true';
+            case false === $value:
+                return 'false';
+            case ctype_digit($value):
+                return \is_string($value) ? "'$value'" : (int) $value;
+            case is_numeric($value):
+                $locale = setlocale(LC_NUMERIC, 0);
+                if (false !== $locale) {
+                    setlocale(LC_NUMERIC, 'C');
+                }
+                if (\is_float($value)) {
+                    $repr = (string) $value;
+                    if (is_infinite($value)) {
+                        $repr = str_ireplace('INF', '.Inf', $repr);
+                    } elseif (floor($value) == $value && $repr == $value) {
+                        // Preserve float data type since storing a whole number will result in integer value.
+                        $repr = '!!float '.$repr;
+                    }
+                } else {
+                    $repr = \is_string($value) ? "'$value'" : (string) $value;
+                }
+                if (false !== $locale) {
+                    setlocale(LC_NUMERIC, $locale);
+                }
+
+                return $repr;
+            case '' == $value:
+                return "''";
+            case self::isBinaryString($value):
+                return '!!binary '.base64_encode($value);
+            case Escaper::requiresDoubleQuoting($value):
+                return Escaper::escapeWithDoubleQuotes($value);
+            case Escaper::requiresSingleQuoting($value):
+            case Parser::preg_match('{^[0-9]+[_0-9]*$}', $value):
+            case Parser::preg_match(self::getHexRegex(), $value):
+            case Parser::preg_match(self::getTimestampRegex(), $value):
+                return Escaper::escapeWithSingleQuotes($value);
+            default:
+                return $value;
+        }
+    }
+
+    /**
+     * Check if given array is hash or just normal indexed array.
+     *
+     * @param array|\ArrayObject|\stdClass $value The PHP array or array-like object to check
+     *
+     * @return bool true if value is hash array, false otherwise
+     */
+    public static function isHash($value): bool
+    {
+        if ($value instanceof \stdClass || $value instanceof \ArrayObject) {
+            return true;
+        }
+
+        $expectedKey = 0;
+
+        foreach ($value as $key => $val) {
+            if ($key !== $expectedKey++) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Dumps a PHP array to a YAML string.
+     *
+     * @param array $value The PHP array to dump
+     * @param int   $flags A bit field of Yaml::DUMP_* constants to customize the dumped YAML string
+     *
+     * @return string The YAML string representing the PHP array
+     */
+    private static function dumpArray(array $value, int $flags): string
+    {
+        // array
+        if (($value || Yaml::DUMP_EMPTY_ARRAY_AS_SEQUENCE & $flags) && !self::isHash($value)) {
+            $output = array();
+            foreach ($value as $val) {
+                $output[] = self::dump($val, $flags);
+            }
+
+            return sprintf('[%s]', implode(', ', $output));
+        }
+
+        // hash
+        $output = array();
+        foreach ($value as $key => $val) {
+            $output[] = sprintf('%s: %s', self::dump($key, $flags), self::dump($val, $flags));
+        }
+
+        return sprintf('{ %s }', implode(', ', $output));
+    }
+
+    /**
+     * Parses a YAML scalar.
+     *
+     * @return mixed
+     *
+     * @throws ParseException When malformed inline YAML string is parsed
+     */
+    public static function parseScalar(string $scalar, int $flags = 0, array $delimiters = null, int &$i = 0, bool $evaluate = true, array $references = array())
+    {
+        if (\in_array($scalar[$i], array('"', "'"))) {
+            // quoted scalar
+            $output = self::parseQuotedScalar($scalar, $i);
+
+            if (null !== $delimiters) {
+                $tmp = ltrim(substr($scalar, $i), ' ');
+                if ('' === $tmp) {
+                    throw new ParseException(sprintf('Unexpected end of line, expected one of "%s".', implode($delimiters)), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
+                }
+                if (!\in_array($tmp[0], $delimiters)) {
+                    throw new ParseException(sprintf('Unexpected characters (%s).', substr($scalar, $i)), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
+                }
+            }
+        } else {
+            // "normal" string
+            if (!$delimiters) {
+                $output = substr($scalar, $i);
+                $i += \strlen($output);
+
+                // remove comments
+                if (Parser::preg_match('/[ \t]+#/', $output, $match, PREG_OFFSET_CAPTURE)) {
+                    $output = substr($output, 0, $match[0][1]);
+                }
+            } elseif (Parser::preg_match('/^(.*?)('.implode('|', $delimiters).')/', substr($scalar, $i), $match)) {
+                $output = $match[1];
+                $i += \strlen($output);
+                $output = trim($output);
+            } else {
+                throw new ParseException(sprintf('Malformed inline YAML string: %s.', $scalar), self::$parsedLineNumber + 1, null, self::$parsedFilename);
+            }
+
+            // a non-quoted string cannot start with @ or ` (reserved) nor with a scalar indicator (| or >)
+            if ($output && ('@' === $output[0] || '`' === $output[0] || '|' === $output[0] || '>' === $output[0] || '%' === $output[0])) {
+                throw new ParseException(sprintf('The reserved indicator "%s" cannot start a plain scalar; you need to quote the scalar.', $output[0]), self::$parsedLineNumber + 1, $output, self::$parsedFilename);
+            }
+
+            if ($evaluate) {
+                $output = self::evaluateScalar($output, $flags, $references);
+            }
+        }
+
+        return $output;
+    }
+
+    /**
+     * Parses a YAML quoted scalar.
+     *
+     * @throws ParseException When malformed inline YAML string is parsed
+     */
+    private static function parseQuotedScalar(string $scalar, int &$i): string
+    {
+        if (!Parser::preg_match('/'.self::REGEX_QUOTED_STRING.'/Au', substr($scalar, $i), $match)) {
+            throw new ParseException(sprintf('Malformed inline YAML string: %s.', substr($scalar, $i)), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
+        }
+
+        $output = substr($match[0], 1, \strlen($match[0]) - 2);
+
+        $unescaper = new Unescaper();
+        if ('"' == $scalar[$i]) {
+            $output = $unescaper->unescapeDoubleQuotedString($output);
+        } else {
+            $output = $unescaper->unescapeSingleQuotedString($output);
+        }
+
+        $i += \strlen($match[0]);
+
+        return $output;
+    }
+
+    /**
+     * Parses a YAML sequence.
+     *
+     * @throws ParseException When malformed inline YAML string is parsed
+     */
+    private static function parseSequence(string $sequence, int $flags, int &$i = 0, array $references = array()): array
+    {
+        $output = array();
+        $len = \strlen($sequence);
+        ++$i;
+
+        // [foo, bar, ...]
+        while ($i < $len) {
+            if (']' === $sequence[$i]) {
+                return $output;
+            }
+            if (',' === $sequence[$i] || ' ' === $sequence[$i]) {
+                ++$i;
+
+                continue;
+            }
+
+            $tag = self::parseTag($sequence, $i, $flags);
+            switch ($sequence[$i]) {
+                case '[':
+                    // nested sequence
+                    $value = self::parseSequence($sequence, $flags, $i, $references);
+                    break;
+                case '{':
+                    // nested mapping
+                    $value = self::parseMapping($sequence, $flags, $i, $references);
+                    break;
+                default:
+                    $isQuoted = \in_array($sequence[$i], array('"', "'"));
+                    $value = self::parseScalar($sequence, $flags, array(',', ']'), $i, null === $tag, $references);
+
+                    // the value can be an array if a reference has been resolved to an array var
+                    if (\is_string($value) && !$isQuoted && false !== strpos($value, ': ')) {
+                        // embedded mapping?
+                        try {
+                            $pos = 0;
+                            $value = self::parseMapping('{'.$value.'}', $flags, $pos, $references);
+                        } catch (\InvalidArgumentException $e) {
+                            // no, it's not
+                        }
+                    }
+
+                    --$i;
+            }
+
+            if (null !== $tag && '' !== $tag) {
+                $value = new TaggedValue($tag, $value);
+            }
+
+            $output[] = $value;
+
+            ++$i;
+        }
+
+        throw new ParseException(sprintf('Malformed inline YAML string: %s.', $sequence), self::$parsedLineNumber + 1, null, self::$parsedFilename);
+    }
+
+    /**
+     * Parses a YAML mapping.
+     *
+     * @return array|\stdClass
+     *
+     * @throws ParseException When malformed inline YAML string is parsed
+     */
+    private static function parseMapping(string $mapping, int $flags, int &$i = 0, array $references = array())
+    {
+        $output = array();
+        $len = \strlen($mapping);
+        ++$i;
+        $allowOverwrite = false;
+
+        // {foo: bar, bar:foo, ...}
+        while ($i < $len) {
+            switch ($mapping[$i]) {
+                case ' ':
+                case ',':
+                    ++$i;
+                    continue 2;
+                case '}':
+                    if (self::$objectForMap) {
+                        return (object) $output;
+                    }
+
+                    return $output;
+            }
+
+            // key
+            $offsetBeforeKeyParsing = $i;
+            $isKeyQuoted = \in_array($mapping[$i], array('"', "'"), true);
+            $key = self::parseScalar($mapping, $flags, array(':', ' '), $i, false, array());
+
+            if ($offsetBeforeKeyParsing === $i) {
+                throw new ParseException('Missing mapping key.', self::$parsedLineNumber + 1, $mapping);
+            }
+
+            if (false === $i = strpos($mapping, ':', $i)) {
+                break;
+            }
+
+            if (!$isKeyQuoted) {
+                $evaluatedKey = self::evaluateScalar($key, $flags, $references);
+
+                if ('' !== $key && $evaluatedKey !== $key && !\is_string($evaluatedKey) && !\is_int($evaluatedKey)) {
+                    throw new ParseException('Implicit casting of incompatible mapping keys to strings is not supported. Quote your evaluable mapping keys instead.', self::$parsedLineNumber + 1, $mapping);
+                }
+            }
+
+            if (!$isKeyQuoted && (!isset($mapping[$i + 1]) || !\in_array($mapping[$i + 1], array(' ', ',', '[', ']', '{', '}'), true))) {
+                throw new ParseException('Colons must be followed by a space or an indication character (i.e. " ", ",", "[", "]", "{", "}").', self::$parsedLineNumber + 1, $mapping);
+            }
+
+            if ('<<' === $key) {
+                $allowOverwrite = true;
+            }
+
+            while ($i < $len) {
+                if (':' === $mapping[$i] || ' ' === $mapping[$i]) {
+                    ++$i;
+
+                    continue;
+                }
+
+                $tag = self::parseTag($mapping, $i, $flags);
+                switch ($mapping[$i]) {
+                    case '[':
+                        // nested sequence
+                        $value = self::parseSequence($mapping, $flags, $i, $references);
+                        // Spec: Keys MUST be unique; first one wins.
+                        // Parser cannot abort this mapping earlier, since lines
+                        // are processed sequentially.
+                        // But overwriting is allowed when a merge node is used in current block.
+                        if ('<<' === $key) {
+                            foreach ($value as $parsedValue) {
+                                $output += $parsedValue;
+                            }
+                        } elseif ($allowOverwrite || !isset($output[$key])) {
+                            if (null !== $tag) {
+                                $output[$key] = new TaggedValue($tag, $value);
+                            } else {
+                                $output[$key] = $value;
+                            }
+                        } elseif (isset($output[$key])) {
+                            throw new ParseException(sprintf('Duplicate key "%s" detected.', $key), self::$parsedLineNumber + 1, $mapping);
+                        }
+                        break;
+                    case '{':
+                        // nested mapping
+                        $value = self::parseMapping($mapping, $flags, $i, $references);
+                        // Spec: Keys MUST be unique; first one wins.
+                        // Parser cannot abort this mapping earlier, since lines
+                        // are processed sequentially.
+                        // But overwriting is allowed when a merge node is used in current block.
+                        if ('<<' === $key) {
+                            $output += $value;
+                        } elseif ($allowOverwrite || !isset($output[$key])) {
+                            if (null !== $tag) {
+                                $output[$key] = new TaggedValue($tag, $value);
+                            } else {
+                                $output[$key] = $value;
+                            }
+                        } elseif (isset($output[$key])) {
+                            throw new ParseException(sprintf('Duplicate key "%s" detected.', $key), self::$parsedLineNumber + 1, $mapping);
+                        }
+                        break;
+                    default:
+                        $value = self::parseScalar($mapping, $flags, array(',', '}'), $i, null === $tag, $references);
+                        // Spec: Keys MUST be unique; first one wins.
+                        // Parser cannot abort this mapping earlier, since lines
+                        // are processed sequentially.
+                        // But overwriting is allowed when a merge node is used in current block.
+                        if ('<<' === $key) {
+                            $output += $value;
+                        } elseif ($allowOverwrite || !isset($output[$key])) {
+                            if (null !== $tag) {
+                                $output[$key] = new TaggedValue($tag, $value);
+                            } else {
+                                $output[$key] = $value;
+                            }
+                        } elseif (isset($output[$key])) {
+                            throw new ParseException(sprintf('Duplicate key "%s" detected.', $key), self::$parsedLineNumber + 1, $mapping);
+                        }
+                        --$i;
+                }
+                ++$i;
+
+                continue 2;
+            }
+        }
+
+        throw new ParseException(sprintf('Malformed inline YAML string: %s.', $mapping), self::$parsedLineNumber + 1, null, self::$parsedFilename);
+    }
+
+    /**
+     * Evaluates scalars and replaces magic values.
+     *
+     * @return mixed The evaluated YAML string
+     *
+     * @throws ParseException when object parsing support was disabled and the parser detected a PHP object or when a reference could not be resolved
+     */
+    private static function evaluateScalar(string $scalar, int $flags, array $references = array())
+    {
+        $scalar = trim($scalar);
+        $scalarLower = strtolower($scalar);
+
+        if (0 === strpos($scalar, '*')) {
+            if (false !== $pos = strpos($scalar, '#')) {
+                $value = substr($scalar, 1, $pos - 2);
+            } else {
+                $value = substr($scalar, 1);
+            }
+
+            // an unquoted *
+            if (false === $value || '' === $value) {
+                throw new ParseException('A reference must contain at least one character.', self::$parsedLineNumber + 1, $value, self::$parsedFilename);
+            }
+
+            if (!array_key_exists($value, $references)) {
+                throw new ParseException(sprintf('Reference "%s" does not exist.', $value), self::$parsedLineNumber + 1, $value, self::$parsedFilename);
+            }
+
+            return $references[$value];
+        }
+
+        switch (true) {
+            case 'null' === $scalarLower:
+            case '' === $scalar:
+            case '~' === $scalar:
+                return;
+            case 'true' === $scalarLower:
+                return true;
+            case 'false' === $scalarLower:
+                return false;
+            case '!' === $scalar[0]:
+                switch (true) {
+                    case 0 === strpos($scalar, '!!str '):
+                        return (string) substr($scalar, 6);
+                    case 0 === strpos($scalar, '! '):
+                        return substr($scalar, 2);
+                    case 0 === strpos($scalar, '!php/object'):
+                        if (self::$objectSupport) {
+                            return unserialize(self::parseScalar(substr($scalar, 12)));
+                        }
+
+                        if (self::$exceptionOnInvalidType) {
+                            throw new ParseException('Object support when parsing a YAML file has been disabled.', self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
+                        }
+
+                        return;
+                    case 0 === strpos($scalar, '!php/const'):
+                        if (self::$constantSupport) {
+                            $i = 0;
+                            if (\defined($const = self::parseScalar(substr($scalar, 11), 0, null, $i, false))) {
+                                return \constant($const);
+                            }
+
+                            throw new ParseException(sprintf('The constant "%s" is not defined.', $const), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
+                        }
+                        if (self::$exceptionOnInvalidType) {
+                            throw new ParseException(sprintf('The string "%s" could not be parsed as a constant. Have you forgotten to pass the "Yaml::PARSE_CONSTANT" flag to the parser?', $scalar), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
+                        }
+
+                        return;
+                    case 0 === strpos($scalar, '!!float '):
+                        return (float) substr($scalar, 8);
+                    case 0 === strpos($scalar, '!!binary '):
+                        return self::evaluateBinaryScalar(substr($scalar, 9));
+                    default:
+                        throw new ParseException(sprintf('The string "%s" could not be parsed as it uses an unsupported built-in tag.', $scalar), self::$parsedLineNumber, $scalar, self::$parsedFilename);
+                }
+
+            // Optimize for returning strings.
+            // no break
+            case '+' === $scalar[0] || '-' === $scalar[0] || '.' === $scalar[0] || is_numeric($scalar[0]):
+                switch (true) {
+                    case Parser::preg_match('{^[+-]?[0-9][0-9_]*$}', $scalar):
+                        $scalar = str_replace('_', '', (string) $scalar);
+                        // omitting the break / return as integers are handled in the next case
+                        // no break
+                    case ctype_digit($scalar):
+                        $raw = $scalar;
+                        $cast = (int) $scalar;
+
+                        return '0' == $scalar[0] ? octdec($scalar) : (((string) $raw == (string) $cast) ? $cast : $raw);
+                    case '-' === $scalar[0] && ctype_digit(substr($scalar, 1)):
+                        $raw = $scalar;
+                        $cast = (int) $scalar;
+
+                        return '0' == $scalar[1] ? octdec($scalar) : (((string) $raw === (string) $cast) ? $cast : $raw);
+                    case is_numeric($scalar):
+                    case Parser::preg_match(self::getHexRegex(), $scalar):
+                        $scalar = str_replace('_', '', $scalar);
+
+                        return '0x' === $scalar[0].$scalar[1] ? hexdec($scalar) : (float) $scalar;
+                    case '.inf' === $scalarLower:
+                    case '.nan' === $scalarLower:
+                        return -log(0);
+                    case '-.inf' === $scalarLower:
+                        return log(0);
+                    case Parser::preg_match('/^(-|\+)?[0-9][0-9_]*(\.[0-9_]+)?$/', $scalar):
+                        return (float) str_replace('_', '', $scalar);
+                    case Parser::preg_match(self::getTimestampRegex(), $scalar):
+                        if (Yaml::PARSE_DATETIME & $flags) {
+                            // When no timezone is provided in the parsed date, YAML spec says we must assume UTC.
+                            return new \DateTime($scalar, new \DateTimeZone('UTC'));
+                        }
+
+                        $timeZone = date_default_timezone_get();
+                        date_default_timezone_set('UTC');
+                        $time = strtotime($scalar);
+                        date_default_timezone_set($timeZone);
+
+                        return $time;
+                }
+        }
+
+        return (string) $scalar;
+    }
+
+    private static function parseTag(string $value, int &$i, int $flags): ?string
+    {
+        if ('!' !== $value[$i]) {
+            return null;
+        }
+
+        $tagLength = strcspn($value, " \t\n[]{},", $i + 1);
+        $tag = substr($value, $i + 1, $tagLength);
+
+        $nextOffset = $i + $tagLength + 1;
+        $nextOffset += strspn($value, ' ', $nextOffset);
+
+        // Is followed by a scalar and is a built-in tag
+        if ($tag && (!isset($value[$nextOffset]) || !\in_array($value[$nextOffset], array('[', '{'), true)) && ('!' === $tag[0] || 'str' === $tag || 'php/const' === $tag || 'php/object' === $tag)) {
+            // Manage in {@link self::evaluateScalar()}
+            return null;
+        }
+
+        $i = $nextOffset;
+
+        // Built-in tags
+        if ($tag && '!' === $tag[0]) {
+            throw new ParseException(sprintf('The built-in tag "!%s" is not implemented.', $tag), self::$parsedLineNumber + 1, $value, self::$parsedFilename);
+        }
+
+        if ('' === $tag || Yaml::PARSE_CUSTOM_TAGS & $flags) {
+            return $tag;
+        }
+
+        throw new ParseException(sprintf('Tags support is not enabled. Enable the `Yaml::PARSE_CUSTOM_TAGS` flag to use "!%s".', $tag), self::$parsedLineNumber + 1, $value, self::$parsedFilename);
+    }
+
+    public static function evaluateBinaryScalar(string $scalar): string
+    {
+        $parsedBinaryData = self::parseScalar(preg_replace('/\s/', '', $scalar));
+
+        if (0 !== (\strlen($parsedBinaryData) % 4)) {
+            throw new ParseException(sprintf('The normalized base64 encoded data (data without whitespace characters) length must be a multiple of four (%d bytes given).', \strlen($parsedBinaryData)), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
+        }
+
+        if (!Parser::preg_match('#^[A-Z0-9+/]+={0,2}$#i', $parsedBinaryData)) {
+            throw new ParseException(sprintf('The base64 encoded data (%s) contains invalid characters.', $parsedBinaryData), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
+        }
+
+        return base64_decode($parsedBinaryData, true);
+    }
+
+    private static function isBinaryString(string $value)
+    {
+        return !preg_match('//u', $value) || preg_match('/[^\x00\x07-\x0d\x1B\x20-\xff]/', $value);
+    }
+
+    /**
+     * Gets a regex that matches a YAML date.
+     *
+     * @return string The regular expression
+     *
+     * @see http://www.yaml.org/spec/1.2/spec.html#id2761573
+     */
+    private static function getTimestampRegex(): string
+    {
+        return <<<EOF
+        ~^
+        (?P<year>[0-9][0-9][0-9][0-9])
+        -(?P<month>[0-9][0-9]?)
+        -(?P<day>[0-9][0-9]?)
+        (?:(?:[Tt]|[ \t]+)
+        (?P<hour>[0-9][0-9]?)
+        :(?P<minute>[0-9][0-9])
+        :(?P<second>[0-9][0-9])
+        (?:\.(?P<fraction>[0-9]*))?
+        (?:[ \t]*(?P<tz>Z|(?P<tz_sign>[-+])(?P<tz_hour>[0-9][0-9]?)
+        (?::(?P<tz_minute>[0-9][0-9]))?))?)?
+        $~x
+EOF;
+    }
+
+    /**
+     * Gets a regex that matches a YAML number in hexadecimal notation.
+     *
+     * @return string
+     */
+    private static function getHexRegex(): string
+    {
+        return '~^0x[0-9a-f_]++$~i';
+    }
+}
diff --git a/vendor/symfony/yaml/LICENSE b/vendor/symfony/yaml/LICENSE
new file mode 100644
index 0000000..21d7fb9
--- /dev/null
+++ b/vendor/symfony/yaml/LICENSE
@@ -0,0 +1,19 @@
+Copyright (c) 2004-2018 Fabien Potencier
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished
+to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/vendor/symfony/yaml/Parser.php b/vendor/symfony/yaml/Parser.php
new file mode 100644
index 0000000..35e7443
--- /dev/null
+++ b/vendor/symfony/yaml/Parser.php
@@ -0,0 +1,1095 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Yaml;
+
+use Symfony\Component\Yaml\Exception\ParseException;
+use Symfony\Component\Yaml\Tag\TaggedValue;
+
+/**
+ * Parser parses YAML strings to convert them to PHP arrays.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @final
+ */
+class Parser
+{
+    const TAG_PATTERN = '(?P<tag>![\w!.\/:-]+)';
+    const BLOCK_SCALAR_HEADER_PATTERN = '(?P<separator>\||>)(?P<modifiers>\+|\-|\d+|\+\d+|\-\d+|\d+\+|\d+\-)?(?P<comments> +#.*)?';
+
+    private $filename;
+    private $offset = 0;
+    private $totalNumberOfLines;
+    private $lines = array();
+    private $currentLineNb = -1;
+    private $currentLine = '';
+    private $refs = array();
+    private $skippedLineNumbers = array();
+    private $locallySkippedLineNumbers = array();
+
+    /**
+     * Parses a YAML file into a PHP value.
+     *
+     * @param string $filename The path to the YAML file to be parsed
+     * @param int    $flags    A bit field of PARSE_* constants to customize the YAML parser behavior
+     *
+     * @return mixed The YAML converted to a PHP value
+     *
+     * @throws ParseException If the file could not be read or the YAML is not valid
+     */
+    public function parseFile(string $filename, int $flags = 0)
+    {
+        if (!is_file($filename)) {
+            throw new ParseException(sprintf('File "%s" does not exist.', $filename));
+        }
+
+        if (!is_readable($filename)) {
+            throw new ParseException(sprintf('File "%s" cannot be read.', $filename));
+        }
+
+        $this->filename = $filename;
+
+        try {
+            return $this->parse(file_get_contents($filename), $flags);
+        } finally {
+            $this->filename = null;
+        }
+    }
+
+    /**
+     * Parses a YAML string to a PHP value.
+     *
+     * @param string $value A YAML string
+     * @param int    $flags A bit field of PARSE_* constants to customize the YAML parser behavior
+     *
+     * @return mixed A PHP value
+     *
+     * @throws ParseException If the YAML is not valid
+     */
+    public function parse(string $value, int $flags = 0)
+    {
+        if (false === preg_match('//u', $value)) {
+            throw new ParseException('The YAML value does not appear to be valid UTF-8.', -1, null, $this->filename);
+        }
+
+        $this->refs = array();
+
+        $mbEncoding = null;
+        $data = null;
+
+        if (2 /* MB_OVERLOAD_STRING */ & (int) ini_get('mbstring.func_overload')) {
+            $mbEncoding = mb_internal_encoding();
+            mb_internal_encoding('UTF-8');
+        }
+
+        try {
+            $data = $this->doParse($value, $flags);
+        } finally {
+            if (null !== $mbEncoding) {
+                mb_internal_encoding($mbEncoding);
+            }
+            $this->lines = array();
+            $this->currentLine = '';
+            $this->refs = array();
+            $this->skippedLineNumbers = array();
+            $this->locallySkippedLineNumbers = array();
+        }
+
+        return $data;
+    }
+
+    /**
+     * @internal
+     *
+     * @return int
+     */
+    public function getLastLineNumberBeforeDeprecation(): int
+    {
+        return $this->getRealCurrentLineNb();
+    }
+
+    private function doParse(string $value, int $flags)
+    {
+        $this->currentLineNb = -1;
+        $this->currentLine = '';
+        $value = $this->cleanup($value);
+        $this->lines = explode("\n", $value);
+        $this->locallySkippedLineNumbers = array();
+
+        if (null === $this->totalNumberOfLines) {
+            $this->totalNumberOfLines = \count($this->lines);
+        }
+
+        if (!$this->moveToNextLine()) {
+            return null;
+        }
+
+        $data = array();
+        $context = null;
+        $allowOverwrite = false;
+
+        while ($this->isCurrentLineEmpty()) {
+            if (!$this->moveToNextLine()) {
+                return null;
+            }
+        }
+
+        // Resolves the tag and returns if end of the document
+        if (null !== ($tag = $this->getLineTag($this->currentLine, $flags, false)) && !$this->moveToNextLine()) {
+            return new TaggedValue($tag, '');
+        }
+
+        do {
+            if ($this->isCurrentLineEmpty()) {
+                continue;
+            }
+
+            // tab?
+            if ("\t" === $this->currentLine[0]) {
+                throw new ParseException('A YAML file cannot contain tabs as indentation.', $this->getRealCurrentLineNb() + 1, $this->currentLine, $this->filename);
+            }
+
+            Inline::initialize($flags, $this->getRealCurrentLineNb(), $this->filename);
+
+            $isRef = $mergeNode = false;
+            if (self::preg_match('#^\-((?P<leadspaces>\s+)(?P<value>.+))?$#u', rtrim($this->currentLine), $values)) {
+                if ($context && 'mapping' == $context) {
+                    throw new ParseException('You cannot define a sequence item when in a mapping', $this->getRealCurrentLineNb() + 1, $this->currentLine, $this->filename);
+                }
+                $context = 'sequence';
+
+                if (isset($values['value']) && self::preg_match('#^&(?P<ref>[^ ]+) *(?P<value>.*)#u', $values['value'], $matches)) {
+                    $isRef = $matches['ref'];
+                    $values['value'] = $matches['value'];
+                }
+
+                if (isset($values['value'][1]) && '?' === $values['value'][0] && ' ' === $values['value'][1]) {
+                    throw new ParseException('Complex mappings are not supported.', $this->getRealCurrentLineNb() + 1, $this->currentLine);
+                }
+
+                // array
+                if (!isset($values['value']) || '' == trim($values['value'], ' ') || 0 === strpos(ltrim($values['value'], ' '), '#')) {
+                    $data[] = $this->parseBlock($this->getRealCurrentLineNb() + 1, $this->getNextEmbedBlock(null, true) ?? '', $flags);
+                } elseif (null !== $subTag = $this->getLineTag(ltrim($values['value'], ' '), $flags)) {
+                    $data[] = new TaggedValue(
+                        $subTag,
+                        $this->parseBlock($this->getRealCurrentLineNb() + 1, $this->getNextEmbedBlock(null, true), $flags)
+                    );
+                } else {
+                    if (isset($values['leadspaces'])
+                        && self::preg_match('#^(?P<key>'.Inline::REGEX_QUOTED_STRING.'|[^ \'"\{\[].*?) *\:(\s+(?P<value>.+?))?\s*$#u', $this->trimTag($values['value']), $matches)
+                    ) {
+                        // this is a compact notation element, add to next block and parse
+                        $block = $values['value'];
+                        if ($this->isNextLineIndented()) {
+                            $block .= "\n".$this->getNextEmbedBlock($this->getCurrentLineIndentation() + \strlen($values['leadspaces']) + 1);
+                        }
+
+                        $data[] = $this->parseBlock($this->getRealCurrentLineNb(), $block, $flags);
+                    } else {
+                        $data[] = $this->parseValue($values['value'], $flags, $context);
+                    }
+                }
+                if ($isRef) {
+                    $this->refs[$isRef] = end($data);
+                }
+            } elseif (
+                self::preg_match('#^(?P<key>(?:![^\s]++\s++)?(?:'.Inline::REGEX_QUOTED_STRING.'|(?:!?!php/const:)?[^ \'"\[\{!].*?)) *\:(\s++(?P<value>.+))?$#u', rtrim($this->currentLine), $values)
+                && (false === strpos($values['key'], ' #') || \in_array($values['key'][0], array('"', "'")))
+            ) {
+                if ($context && 'sequence' == $context) {
+                    throw new ParseException('You cannot define a mapping item when in a sequence', $this->currentLineNb + 1, $this->currentLine, $this->filename);
+                }
+                $context = 'mapping';
+
+                try {
+                    $key = Inline::parseScalar($values['key']);
+                } catch (ParseException $e) {
+                    $e->setParsedLine($this->getRealCurrentLineNb() + 1);
+                    $e->setSnippet($this->currentLine);
+
+                    throw $e;
+                }
+
+                if (!\is_string($key) && !\is_int($key)) {
+                    throw new ParseException(sprintf('%s keys are not supported. Quote your evaluable mapping keys instead.', is_numeric($key) ? 'Numeric' : 'Non-string'), $this->getRealCurrentLineNb() + 1, $this->currentLine);
+                }
+
+                // Convert float keys to strings, to avoid being converted to integers by PHP
+                if (\is_float($key)) {
+                    $key = (string) $key;
+                }
+
+                if ('<<' === $key && (!isset($values['value']) || !self::preg_match('#^&(?P<ref>[^ ]+)#u', $values['value'], $refMatches))) {
+                    $mergeNode = true;
+                    $allowOverwrite = true;
+                    if (isset($values['value'][0]) && '*' === $values['value'][0]) {
+                        $refName = substr(rtrim($values['value']), 1);
+                        if (!array_key_exists($refName, $this->refs)) {
+                            throw new ParseException(sprintf('Reference "%s" does not exist.', $refName), $this->getRealCurrentLineNb() + 1, $this->currentLine, $this->filename);
+                        }
+
+                        $refValue = $this->refs[$refName];
+
+                        if (Yaml::PARSE_OBJECT_FOR_MAP & $flags && $refValue instanceof \stdClass) {
+                            $refValue = (array) $refValue;
+                        }
+
+                        if (!\is_array($refValue)) {
+                            throw new ParseException('YAML merge keys used with a scalar value instead of an array.', $this->getRealCurrentLineNb() + 1, $this->currentLine, $this->filename);
+                        }
+
+                        $data += $refValue; // array union
+                    } else {
+                        if (isset($values['value']) && '' !== $values['value']) {
+                            $value = $values['value'];
+                        } else {
+                            $value = $this->getNextEmbedBlock();
+                        }
+                        $parsed = $this->parseBlock($this->getRealCurrentLineNb() + 1, $value, $flags);
+
+                        if (Yaml::PARSE_OBJECT_FOR_MAP & $flags && $parsed instanceof \stdClass) {
+                            $parsed = (array) $parsed;
+                        }
+
+                        if (!\is_array($parsed)) {
+                            throw new ParseException('YAML merge keys used with a scalar value instead of an array.', $this->getRealCurrentLineNb() + 1, $this->currentLine, $this->filename);
+                        }
+
+                        if (isset($parsed[0])) {
+                            // If the value associated with the merge key is a sequence, then this sequence is expected to contain mapping nodes
+                            // and each of these nodes is merged in turn according to its order in the sequence. Keys in mapping nodes earlier
+                            // in the sequence override keys specified in later mapping nodes.
+                            foreach ($parsed as $parsedItem) {
+                                if (Yaml::PARSE_OBJECT_FOR_MAP & $flags && $parsedItem instanceof \stdClass) {
+                                    $parsedItem = (array) $parsedItem;
+                                }
+
+                                if (!\is_array($parsedItem)) {
+                                    throw new ParseException('Merge items must be arrays.', $this->getRealCurrentLineNb() + 1, $parsedItem, $this->filename);
+                                }
+
+                                $data += $parsedItem; // array union
+                            }
+                        } else {
+                            // If the value associated with the key is a single mapping node, each of its key/value pairs is inserted into the
+                            // current mapping, unless the key already exists in it.
+                            $data += $parsed; // array union
+                        }
+                    }
+                } elseif ('<<' !== $key && isset($values['value']) && self::preg_match('#^&(?P<ref>[^ ]++) *+(?P<value>.*)#u', $values['value'], $matches)) {
+                    $isRef = $matches['ref'];
+                    $values['value'] = $matches['value'];
+                }
+
+                $subTag = null;
+                if ($mergeNode) {
+                    // Merge keys
+                } elseif (!isset($values['value']) || '' === $values['value'] || 0 === strpos($values['value'], '#') || (null !== $subTag = $this->getLineTag($values['value'], $flags)) || '<<' === $key) {
+                    // hash
+                    // if next line is less indented or equal, then it means that the current value is null
+                    if (!$this->isNextLineIndented() && !$this->isNextLineUnIndentedCollection()) {
+                        // Spec: Keys MUST be unique; first one wins.
+                        // But overwriting is allowed when a merge node is used in current block.
+                        if ($allowOverwrite || !isset($data[$key])) {
+                            if (null !== $subTag) {
+                                $data[$key] = new TaggedValue($subTag, '');
+                            } else {
+                                $data[$key] = null;
+                            }
+                        } else {
+                            throw new ParseException(sprintf('Duplicate key "%s" detected.', $key), $this->getRealCurrentLineNb() + 1, $this->currentLine);
+                        }
+                    } else {
+                        // remember the parsed line number here in case we need it to provide some contexts in error messages below
+                        $realCurrentLineNbKey = $this->getRealCurrentLineNb();
+                        $value = $this->parseBlock($this->getRealCurrentLineNb() + 1, $this->getNextEmbedBlock(), $flags);
+                        if ('<<' === $key) {
+                            $this->refs[$refMatches['ref']] = $value;
+
+                            if (Yaml::PARSE_OBJECT_FOR_MAP & $flags && $value instanceof \stdClass) {
+                                $value = (array) $value;
+                            }
+
+                            $data += $value;
+                        } elseif ($allowOverwrite || !isset($data[$key])) {
+                            // Spec: Keys MUST be unique; first one wins.
+                            // But overwriting is allowed when a merge node is used in current block.
+                            if (null !== $subTag) {
+                                $data[$key] = new TaggedValue($subTag, $value);
+                            } else {
+                                $data[$key] = $value;
+                            }
+                        } else {
+                            throw new ParseException(sprintf('Duplicate key "%s" detected.', $key), $realCurrentLineNbKey + 1, $this->currentLine);
+                        }
+                    }
+                } else {
+                    $value = $this->parseValue(rtrim($values['value']), $flags, $context);
+                    // Spec: Keys MUST be unique; first one wins.
+                    // But overwriting is allowed when a merge node is used in current block.
+                    if ($allowOverwrite || !isset($data[$key])) {
+                        $data[$key] = $value;
+                    } else {
+                        throw new ParseException(sprintf('Duplicate key "%s" detected.', $key), $this->getRealCurrentLineNb() + 1, $this->currentLine);
+                    }
+                }
+                if ($isRef) {
+                    $this->refs[$isRef] = $data[$key];
+                }
+            } else {
+                // multiple documents are not supported
+                if ('---' === $this->currentLine) {
+                    throw new ParseException('Multiple documents are not supported.', $this->currentLineNb + 1, $this->currentLine, $this->filename);
+                }
+
+                if ($deprecatedUsage = (isset($this->currentLine[1]) && '?' === $this->currentLine[0] && ' ' === $this->currentLine[1])) {
+                    throw new ParseException('Complex mappings are not supported.', $this->getRealCurrentLineNb() + 1, $this->currentLine);
+                }
+
+                // 1-liner optionally followed by newline(s)
+                if (\is_string($value) && $this->lines[0] === trim($value)) {
+                    try {
+                        $value = Inline::parse($this->lines[0], $flags, $this->refs);
+                    } catch (ParseException $e) {
+                        $e->setParsedLine($this->getRealCurrentLineNb() + 1);
+                        $e->setSnippet($this->currentLine);
+
+                        throw $e;
+                    }
+
+                    return $value;
+                }
+
+                // try to parse the value as a multi-line string as a last resort
+                if (0 === $this->currentLineNb) {
+                    $previousLineWasNewline = false;
+                    $previousLineWasTerminatedWithBackslash = false;
+                    $value = '';
+
+                    foreach ($this->lines as $line) {
+                        // If the indentation is not consistent at offset 0, it is to be considered as a ParseError
+                        if (0 === $this->offset && !$deprecatedUsage && isset($line[0]) && ' ' === $line[0]) {
+                            throw new ParseException('Unable to parse.', $this->getRealCurrentLineNb() + 1, $this->currentLine, $this->filename);
+                        }
+                        if ('' === trim($line)) {
+                            $value .= "\n";
+                        } elseif (!$previousLineWasNewline && !$previousLineWasTerminatedWithBackslash) {
+                            $value .= ' ';
+                        }
+
+                        if ('' !== trim($line) && '\\' === substr($line, -1)) {
+                            $value .= ltrim(substr($line, 0, -1));
+                        } elseif ('' !== trim($line)) {
+                            $value .= trim($line);
+                        }
+
+                        if ('' === trim($line)) {
+                            $previousLineWasNewline = true;
+                            $previousLineWasTerminatedWithBackslash = false;
+                        } elseif ('\\' === substr($line, -1)) {
+                            $previousLineWasNewline = false;
+                            $previousLineWasTerminatedWithBackslash = true;
+                        } else {
+                            $previousLineWasNewline = false;
+                            $previousLineWasTerminatedWithBackslash = false;
+                        }
+                    }
+
+                    try {
+                        return Inline::parse(trim($value));
+                    } catch (ParseException $e) {
+                        // fall-through to the ParseException thrown below
+                    }
+                }
+
+                throw new ParseException('Unable to parse.', $this->getRealCurrentLineNb() + 1, $this->currentLine, $this->filename);
+            }
+        } while ($this->moveToNextLine());
+
+        if (null !== $tag) {
+            $data = new TaggedValue($tag, $data);
+        }
+
+        if (Yaml::PARSE_OBJECT_FOR_MAP & $flags && !\is_object($data) && 'mapping' === $context) {
+            $object = new \stdClass();
+
+            foreach ($data as $key => $value) {
+                $object->$key = $value;
+            }
+
+            $data = $object;
+        }
+
+        return empty($data) ? null : $data;
+    }
+
+    private function parseBlock(int $offset, string $yaml, int $flags)
+    {
+        $skippedLineNumbers = $this->skippedLineNumbers;
+
+        foreach ($this->locallySkippedLineNumbers as $lineNumber) {
+            if ($lineNumber < $offset) {
+                continue;
+            }
+
+            $skippedLineNumbers[] = $lineNumber;
+        }
+
+        $parser = new self();
+        $parser->offset = $offset;
+        $parser->totalNumberOfLines = $this->totalNumberOfLines;
+        $parser->skippedLineNumbers = $skippedLineNumbers;
+        $parser->refs = &$this->refs;
+
+        return $parser->doParse($yaml, $flags);
+    }
+
+    /**
+     * Returns the current line number (takes the offset into account).
+     *
+     * @internal
+     *
+     * @return int The current line number
+     */
+    public function getRealCurrentLineNb(): int
+    {
+        $realCurrentLineNumber = $this->currentLineNb + $this->offset;
+
+        foreach ($this->skippedLineNumbers as $skippedLineNumber) {
+            if ($skippedLineNumber > $realCurrentLineNumber) {
+                break;
+            }
+
+            ++$realCurrentLineNumber;
+        }
+
+        return $realCurrentLineNumber;
+    }
+
+    /**
+     * Returns the current line indentation.
+     *
+     * @return int The current line indentation
+     */
+    private function getCurrentLineIndentation(): int
+    {
+        return \strlen($this->currentLine) - \strlen(ltrim($this->currentLine, ' '));
+    }
+
+    /**
+     * Returns the next embed block of YAML.
+     *
+     * @param int|null $indentation The indent level at which the block is to be read, or null for default
+     * @param bool     $inSequence  True if the enclosing data structure is a sequence
+     *
+     * @return string A YAML string
+     *
+     * @throws ParseException When indentation problem are detected
+     */
+    private function getNextEmbedBlock(int $indentation = null, bool $inSequence = false): ?string
+    {
+        $oldLineIndentation = $this->getCurrentLineIndentation();
+        $blockScalarIndentations = array();
+
+        if ($this->isBlockScalarHeader()) {
+            $blockScalarIndentations[] = $oldLineIndentation;
+        }
+
+        if (!$this->moveToNextLine()) {
+            return null;
+        }
+
+        if (null === $indentation) {
+            $newIndent = null;
+            $movements = 0;
+
+            do {
+                $EOF = false;
+
+                // empty and comment-like lines do not influence the indentation depth
+                if ($this->isCurrentLineEmpty() || $this->isCurrentLineComment()) {
+                    $EOF = !$this->moveToNextLine();
+
+                    if (!$EOF) {
+                        ++$movements;
+                    }
+                } else {
+                    $newIndent = $this->getCurrentLineIndentation();
+                }
+            } while (!$EOF && null === $newIndent);
+
+            for ($i = 0; $i < $movements; ++$i) {
+                $this->moveToPreviousLine();
+            }
+
+            $unindentedEmbedBlock = $this->isStringUnIndentedCollectionItem();
+
+            if (!$this->isCurrentLineEmpty() && 0 === $newIndent && !$unindentedEmbedBlock) {
+                throw new ParseException('Indentation problem.', $this->getRealCurrentLineNb() + 1, $this->currentLine, $this->filename);
+            }
+        } else {
+            $newIndent = $indentation;
+        }
+
+        $data = array();
+        if ($this->getCurrentLineIndentation() >= $newIndent) {
+            $data[] = substr($this->currentLine, $newIndent);
+        } elseif ($this->isCurrentLineEmpty() || $this->isCurrentLineComment()) {
+            $data[] = $this->currentLine;
+        } else {
+            $this->moveToPreviousLine();
+
+            return null;
+        }
+
+        if ($inSequence && $oldLineIndentation === $newIndent && isset($data[0][0]) && '-' === $data[0][0]) {
+            // the previous line contained a dash but no item content, this line is a sequence item with the same indentation
+            // and therefore no nested list or mapping
+            $this->moveToPreviousLine();
+
+            return null;
+        }
+
+        $isItUnindentedCollection = $this->isStringUnIndentedCollectionItem();
+
+        if (empty($blockScalarIndentations) && $this->isBlockScalarHeader()) {
+            $blockScalarIndentations[] = $this->getCurrentLineIndentation();
+        }
+
+        $previousLineIndentation = $this->getCurrentLineIndentation();
+
+        while ($this->moveToNextLine()) {
+            $indent = $this->getCurrentLineIndentation();
+
+            // terminate all block scalars that are more indented than the current line
+            if (!empty($blockScalarIndentations) && $indent < $previousLineIndentation && '' !== trim($this->currentLine)) {
+                foreach ($blockScalarIndentations as $key => $blockScalarIndentation) {
+                    if ($blockScalarIndentation >= $indent) {
+                        unset($blockScalarIndentations[$key]);
+                    }
+                }
+            }
+
+            if (empty($blockScalarIndentations) && !$this->isCurrentLineComment() && $this->isBlockScalarHeader()) {
+                $blockScalarIndentations[] = $indent;
+            }
+
+            $previousLineIndentation = $indent;
+
+            if ($isItUnindentedCollection && !$this->isCurrentLineEmpty() && !$this->isStringUnIndentedCollectionItem() && $newIndent === $indent) {
+                $this->moveToPreviousLine();
+                break;
+            }
+
+            if ($this->isCurrentLineBlank()) {
+                $data[] = substr($this->currentLine, $newIndent);
+                continue;
+            }
+
+            if ($indent >= $newIndent) {
+                $data[] = substr($this->currentLine, $newIndent);
+            } elseif ($this->isCurrentLineComment()) {
+                $data[] = $this->currentLine;
+            } elseif (0 == $indent) {
+                $this->moveToPreviousLine();
+
+                break;
+            } else {
+                throw new ParseException('Indentation problem.', $this->getRealCurrentLineNb() + 1, $this->currentLine, $this->filename);
+            }
+        }
+
+        return implode("\n", $data);
+    }
+
+    /**
+     * Moves the parser to the next line.
+     *
+     * @return bool
+     */
+    private function moveToNextLine(): bool
+    {
+        if ($this->currentLineNb >= \count($this->lines) - 1) {
+            return false;
+        }
+
+        $this->currentLine = $this->lines[++$this->currentLineNb];
+
+        return true;
+    }
+
+    /**
+     * Moves the parser to the previous line.
+     *
+     * @return bool
+     */
+    private function moveToPreviousLine(): bool
+    {
+        if ($this->currentLineNb < 1) {
+            return false;
+        }
+
+        $this->currentLine = $this->lines[--$this->currentLineNb];
+
+        return true;
+    }
+
+    /**
+     * Parses a YAML value.
+     *
+     * @param string $value   A YAML value
+     * @param int    $flags   A bit field of PARSE_* constants to customize the YAML parser behavior
+     * @param string $context The parser context (either sequence or mapping)
+     *
+     * @return mixed A PHP value
+     *
+     * @throws ParseException When reference does not exist
+     */
+    private function parseValue(string $value, int $flags, string $context)
+    {
+        if (0 === strpos($value, '*')) {
+            if (false !== $pos = strpos($value, '#')) {
+                $value = substr($value, 1, $pos - 2);
+            } else {
+                $value = substr($value, 1);
+            }
+
+            if (!array_key_exists($value, $this->refs)) {
+                throw new ParseException(sprintf('Reference "%s" does not exist.', $value), $this->currentLineNb + 1, $this->currentLine, $this->filename);
+            }
+
+            return $this->refs[$value];
+        }
+
+        if (self::preg_match('/^(?:'.self::TAG_PATTERN.' +)?'.self::BLOCK_SCALAR_HEADER_PATTERN.'$/', $value, $matches)) {
+            $modifiers = isset($matches['modifiers']) ? $matches['modifiers'] : '';
+
+            $data = $this->parseBlockScalar($matches['separator'], preg_replace('#\d+#', '', $modifiers), (int) abs($modifiers));
+
+            if ('' !== $matches['tag'] && '!' !== $matches['tag']) {
+                if ('!!binary' === $matches['tag']) {
+                    return Inline::evaluateBinaryScalar($data);
+                }
+
+                return new TaggedValue(substr($matches['tag'], 1), $data);
+            }
+
+            return $data;
+        }
+
+        try {
+            $quotation = '' !== $value && ('"' === $value[0] || "'" === $value[0]) ? $value[0] : null;
+
+            // do not take following lines into account when the current line is a quoted single line value
+            if (null !== $quotation && self::preg_match('/^'.$quotation.'.*'.$quotation.'(\s*#.*)?$/', $value)) {
+                return Inline::parse($value, $flags, $this->refs);
+            }
+
+            $lines = array();
+
+            while ($this->moveToNextLine()) {
+                // unquoted strings end before the first unindented line
+                if (null === $quotation && 0 === $this->getCurrentLineIndentation()) {
+                    $this->moveToPreviousLine();
+
+                    break;
+                }
+
+                $lines[] = trim($this->currentLine);
+
+                // quoted string values end with a line that is terminated with the quotation character
+                if ('' !== $this->currentLine && substr($this->currentLine, -1) === $quotation) {
+                    break;
+                }
+            }
+
+            for ($i = 0, $linesCount = \count($lines), $previousLineBlank = false; $i < $linesCount; ++$i) {
+                if ('' === $lines[$i]) {
+                    $value .= "\n";
+                    $previousLineBlank = true;
+                } elseif ($previousLineBlank) {
+                    $value .= $lines[$i];
+                    $previousLineBlank = false;
+                } else {
+                    $value .= ' '.$lines[$i];
+                    $previousLineBlank = false;
+                }
+            }
+
+            Inline::$parsedLineNumber = $this->getRealCurrentLineNb();
+
+            $parsedValue = Inline::parse($value, $flags, $this->refs);
+
+            if ('mapping' === $context && \is_string($parsedValue) && '"' !== $value[0] && "'" !== $value[0] && '[' !== $value[0] && '{' !== $value[0] && '!' !== $value[0] && false !== strpos($parsedValue, ': ')) {
+                throw new ParseException('A colon cannot be used in an unquoted mapping value.', $this->getRealCurrentLineNb() + 1, $value, $this->filename);
+            }
+
+            return $parsedValue;
+        } catch (ParseException $e) {
+            $e->setParsedLine($this->getRealCurrentLineNb() + 1);
+            $e->setSnippet($this->currentLine);
+
+            throw $e;
+        }
+    }
+
+    /**
+     * Parses a block scalar.
+     *
+     * @param string $style       The style indicator that was used to begin this block scalar (| or >)
+     * @param string $chomping    The chomping indicator that was used to begin this block scalar (+ or -)
+     * @param int    $indentation The indentation indicator that was used to begin this block scalar
+     *
+     * @return string The text value
+     */
+    private function parseBlockScalar(string $style, string $chomping = '', int $indentation = 0): string
+    {
+        $notEOF = $this->moveToNextLine();
+        if (!$notEOF) {
+            return '';
+        }
+
+        $isCurrentLineBlank = $this->isCurrentLineBlank();
+        $blockLines = array();
+
+        // leading blank lines are consumed before determining indentation
+        while ($notEOF && $isCurrentLineBlank) {
+            // newline only if not EOF
+            if ($notEOF = $this->moveToNextLine()) {
+                $blockLines[] = '';
+                $isCurrentLineBlank = $this->isCurrentLineBlank();
+            }
+        }
+
+        // determine indentation if not specified
+        if (0 === $indentation) {
+            if (self::preg_match('/^ +/', $this->currentLine, $matches)) {
+                $indentation = \strlen($matches[0]);
+            }
+        }
+
+        if ($indentation > 0) {
+            $pattern = sprintf('/^ {%d}(.*)$/', $indentation);
+
+            while (
+                $notEOF && (
+                    $isCurrentLineBlank ||
+                    self::preg_match($pattern, $this->currentLine, $matches)
+                )
+            ) {
+                if ($isCurrentLineBlank && \strlen($this->currentLine) > $indentation) {
+                    $blockLines[] = substr($this->currentLine, $indentation);
+                } elseif ($isCurrentLineBlank) {
+                    $blockLines[] = '';
+                } else {
+                    $blockLines[] = $matches[1];
+                }
+
+                // newline only if not EOF
+                if ($notEOF = $this->moveToNextLine()) {
+                    $isCurrentLineBlank = $this->isCurrentLineBlank();
+                }
+            }
+        } elseif ($notEOF) {
+            $blockLines[] = '';
+        }
+
+        if ($notEOF) {
+            $blockLines[] = '';
+            $this->moveToPreviousLine();
+        } elseif (!$notEOF && !$this->isCurrentLineLastLineInDocument()) {
+            $blockLines[] = '';
+        }
+
+        // folded style
+        if ('>' === $style) {
+            $text = '';
+            $previousLineIndented = false;
+            $previousLineBlank = false;
+
+            for ($i = 0, $blockLinesCount = \count($blockLines); $i < $blockLinesCount; ++$i) {
+                if ('' === $blockLines[$i]) {
+                    $text .= "\n";
+                    $previousLineIndented = false;
+                    $previousLineBlank = true;
+                } elseif (' ' === $blockLines[$i][0]) {
+                    $text .= "\n".$blockLines[$i];
+                    $previousLineIndented = true;
+                    $previousLineBlank = false;
+                } elseif ($previousLineIndented) {
+                    $text .= "\n".$blockLines[$i];
+                    $previousLineIndented = false;
+                    $previousLineBlank = false;
+                } elseif ($previousLineBlank || 0 === $i) {
+                    $text .= $blockLines[$i];
+                    $previousLineIndented = false;
+                    $previousLineBlank = false;
+                } else {
+                    $text .= ' '.$blockLines[$i];
+                    $previousLineIndented = false;
+                    $previousLineBlank = false;
+                }
+            }
+        } else {
+            $text = implode("\n", $blockLines);
+        }
+
+        // deal with trailing newlines
+        if ('' === $chomping) {
+            $text = preg_replace('/\n+$/', "\n", $text);
+        } elseif ('-' === $chomping) {
+            $text = preg_replace('/\n+$/', '', $text);
+        }
+
+        return $text;
+    }
+
+    /**
+     * Returns true if the next line is indented.
+     *
+     * @return bool Returns true if the next line is indented, false otherwise
+     */
+    private function isNextLineIndented(): bool
+    {
+        $currentIndentation = $this->getCurrentLineIndentation();
+        $movements = 0;
+
+        do {
+            $EOF = !$this->moveToNextLine();
+
+            if (!$EOF) {
+                ++$movements;
+            }
+        } while (!$EOF && ($this->isCurrentLineEmpty() || $this->isCurrentLineComment()));
+
+        if ($EOF) {
+            return false;
+        }
+
+        $ret = $this->getCurrentLineIndentation() > $currentIndentation;
+
+        for ($i = 0; $i < $movements; ++$i) {
+            $this->moveToPreviousLine();
+        }
+
+        return $ret;
+    }
+
+    /**
+     * Returns true if the current line is blank or if it is a comment line.
+     *
+     * @return bool Returns true if the current line is empty or if it is a comment line, false otherwise
+     */
+    private function isCurrentLineEmpty(): bool
+    {
+        return $this->isCurrentLineBlank() || $this->isCurrentLineComment();
+    }
+
+    /**
+     * Returns true if the current line is blank.
+     *
+     * @return bool Returns true if the current line is blank, false otherwise
+     */
+    private function isCurrentLineBlank(): bool
+    {
+        return '' == trim($this->currentLine, ' ');
+    }
+
+    /**
+     * Returns true if the current line is a comment line.
+     *
+     * @return bool Returns true if the current line is a comment line, false otherwise
+     */
+    private function isCurrentLineComment(): bool
+    {
+        //checking explicitly the first char of the trim is faster than loops or strpos
+        $ltrimmedLine = ltrim($this->currentLine, ' ');
+
+        return '' !== $ltrimmedLine && '#' === $ltrimmedLine[0];
+    }
+
+    private function isCurrentLineLastLineInDocument(): bool
+    {
+        return ($this->offset + $this->currentLineNb) >= ($this->totalNumberOfLines - 1);
+    }
+
+    /**
+     * Cleanups a YAML string to be parsed.
+     *
+     * @param string $value The input YAML string
+     *
+     * @return string A cleaned up YAML string
+     */
+    private function cleanup(string $value): string
+    {
+        $value = str_replace(array("\r\n", "\r"), "\n", $value);
+
+        // strip YAML header
+        $count = 0;
+        $value = preg_replace('#^\%YAML[: ][\d\.]+.*\n#u', '', $value, -1, $count);
+        $this->offset += $count;
+
+        // remove leading comments
+        $trimmedValue = preg_replace('#^(\#.*?\n)+#s', '', $value, -1, $count);
+        if (1 === $count) {
+            // items have been removed, update the offset
+            $this->offset += substr_count($value, "\n") - substr_count($trimmedValue, "\n");
+            $value = $trimmedValue;
+        }
+
+        // remove start of the document marker (---)
+        $trimmedValue = preg_replace('#^\-\-\-.*?\n#s', '', $value, -1, $count);
+        if (1 === $count) {
+            // items have been removed, update the offset
+            $this->offset += substr_count($value, "\n") - substr_count($trimmedValue, "\n");
+            $value = $trimmedValue;
+
+            // remove end of the document marker (...)
+            $value = preg_replace('#\.\.\.\s*$#', '', $value);
+        }
+
+        return $value;
+    }
+
+    /**
+     * Returns true if the next line starts unindented collection.
+     *
+     * @return bool Returns true if the next line starts unindented collection, false otherwise
+     */
+    private function isNextLineUnIndentedCollection(): bool
+    {
+        $currentIndentation = $this->getCurrentLineIndentation();
+        $movements = 0;
+
+        do {
+            $EOF = !$this->moveToNextLine();
+
+            if (!$EOF) {
+                ++$movements;
+            }
+        } while (!$EOF && ($this->isCurrentLineEmpty() || $this->isCurrentLineComment()));
+
+        if ($EOF) {
+            return false;
+        }
+
+        $ret = $this->getCurrentLineIndentation() === $currentIndentation && $this->isStringUnIndentedCollectionItem();
+
+        for ($i = 0; $i < $movements; ++$i) {
+            $this->moveToPreviousLine();
+        }
+
+        return $ret;
+    }
+
+    /**
+     * Returns true if the string is un-indented collection item.
+     *
+     * @return bool Returns true if the string is un-indented collection item, false otherwise
+     */
+    private function isStringUnIndentedCollectionItem(): bool
+    {
+        return '-' === rtrim($this->currentLine) || 0 === strpos($this->currentLine, '- ');
+    }
+
+    /**
+     * Tests whether or not the current line is the header of a block scalar.
+     *
+     * @return bool
+     */
+    private function isBlockScalarHeader(): bool
+    {
+        return (bool) self::preg_match('~'.self::BLOCK_SCALAR_HEADER_PATTERN.'$~', $this->currentLine);
+    }
+
+    /**
+     * A local wrapper for `preg_match` which will throw a ParseException if there
+     * is an internal error in the PCRE engine.
+     *
+     * This avoids us needing to check for "false" every time PCRE is used
+     * in the YAML engine
+     *
+     * @throws ParseException on a PCRE internal error
+     *
+     * @see preg_last_error()
+     *
+     * @internal
+     */
+    public static function preg_match(string $pattern, string $subject, array &$matches = null, int $flags = 0, int $offset = 0): int
+    {
+        if (false === $ret = preg_match($pattern, $subject, $matches, $flags, $offset)) {
+            switch (preg_last_error()) {
+                case PREG_INTERNAL_ERROR:
+                    $error = 'Internal PCRE error.';
+                    break;
+                case PREG_BACKTRACK_LIMIT_ERROR:
+                    $error = 'pcre.backtrack_limit reached.';
+                    break;
+                case PREG_RECURSION_LIMIT_ERROR:
+                    $error = 'pcre.recursion_limit reached.';
+                    break;
+                case PREG_BAD_UTF8_ERROR:
+                    $error = 'Malformed UTF-8 data.';
+                    break;
+                case PREG_BAD_UTF8_OFFSET_ERROR:
+                    $error = 'Offset doesn\'t correspond to the begin of a valid UTF-8 code point.';
+                    break;
+                default:
+                    $error = 'Error.';
+            }
+
+            throw new ParseException($error);
+        }
+
+        return $ret;
+    }
+
+    /**
+     * Trim the tag on top of the value.
+     *
+     * Prevent values such as `!foo {quz: bar}` to be considered as
+     * a mapping block.
+     */
+    private function trimTag(string $value): string
+    {
+        if ('!' === $value[0]) {
+            return ltrim(substr($value, 1, strcspn($value, " \r\n", 1)), ' ');
+        }
+
+        return $value;
+    }
+
+    private function getLineTag(string $value, int $flags, bool $nextLineCheck = true): ?string
+    {
+        if ('' === $value || '!' !== $value[0] || 1 !== self::preg_match('/^'.self::TAG_PATTERN.' *( +#.*)?$/', $value, $matches)) {
+            return null;
+        }
+
+        if ($nextLineCheck && !$this->isNextLineIndented()) {
+            return null;
+        }
+
+        $tag = substr($matches['tag'], 1);
+
+        // Built-in tags
+        if ($tag && '!' === $tag[0]) {
+            throw new ParseException(sprintf('The built-in tag "!%s" is not implemented.', $tag), $this->getRealCurrentLineNb() + 1, $value, $this->filename);
+        }
+
+        if (Yaml::PARSE_CUSTOM_TAGS & $flags) {
+            return $tag;
+        }
+
+        throw new ParseException(sprintf('Tags support is not enabled. You must use the flag `Yaml::PARSE_CUSTOM_TAGS` to use "%s".', $matches['tag']), $this->getRealCurrentLineNb() + 1, $value, $this->filename);
+    }
+}
diff --git a/vendor/symfony/yaml/README.md b/vendor/symfony/yaml/README.md
new file mode 100644
index 0000000..0d32488
--- /dev/null
+++ b/vendor/symfony/yaml/README.md
@@ -0,0 +1,13 @@
+Yaml Component
+==============
+
+The Yaml component loads and dumps YAML files.
+
+Resources
+---------
+
+  * [Documentation](https://symfony.com/doc/current/components/yaml/index.html)
+  * [Contributing](https://symfony.com/doc/current/contributing/index.html)
+  * [Report issues](https://github.com/symfony/symfony/issues) and
+    [send Pull Requests](https://github.com/symfony/symfony/pulls)
+    in the [main Symfony repository](https://github.com/symfony/symfony)
diff --git a/vendor/symfony/yaml/Tag/TaggedValue.php b/vendor/symfony/yaml/Tag/TaggedValue.php
new file mode 100644
index 0000000..4ea3406
--- /dev/null
+++ b/vendor/symfony/yaml/Tag/TaggedValue.php
@@ -0,0 +1,38 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Yaml\Tag;
+
+/**
+ * @author Nicolas Grekas <p@tchwork.com>
+ * @author Guilhem N. <egetick@gmail.com>
+ */
+final class TaggedValue
+{
+    private $tag;
+    private $value;
+
+    public function __construct(string $tag, $value)
+    {
+        $this->tag = $tag;
+        $this->value = $value;
+    }
+
+    public function getTag(): string
+    {
+        return $this->tag;
+    }
+
+    public function getValue()
+    {
+        return $this->value;
+    }
+}
diff --git a/vendor/symfony/yaml/Tests/Command/LintCommandTest.php b/vendor/symfony/yaml/Tests/Command/LintCommandTest.php
new file mode 100644
index 0000000..a5baf23
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/Command/LintCommandTest.php
@@ -0,0 +1,139 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Yaml\Tests\Command;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Console\Application;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Tester\CommandTester;
+use Symfony\Component\Yaml\Command\LintCommand;
+
+/**
+ * Tests the YamlLintCommand.
+ *
+ * @author Robin Chalas <robin.chalas@gmail.com>
+ */
+class LintCommandTest extends TestCase
+{
+    private $files;
+
+    public function testLintCorrectFile()
+    {
+        $tester = $this->createCommandTester();
+        $filename = $this->createFile('foo: bar');
+
+        $ret = $tester->execute(array('filename' => $filename), array('verbosity' => OutputInterface::VERBOSITY_VERBOSE, 'decorated' => false));
+
+        $this->assertEquals(0, $ret, 'Returns 0 in case of success');
+        $this->assertRegExp('/^\/\/ OK in /', trim($tester->getDisplay()));
+    }
+
+    public function testLintIncorrectFile()
+    {
+        $incorrectContent = '
+foo:
+bar';
+        $tester = $this->createCommandTester();
+        $filename = $this->createFile($incorrectContent);
+
+        $ret = $tester->execute(array('filename' => $filename), array('decorated' => false));
+
+        $this->assertEquals(1, $ret, 'Returns 1 in case of error');
+        $this->assertContains('Unable to parse at line 3 (near "bar").', trim($tester->getDisplay()));
+    }
+
+    public function testConstantAsKey()
+    {
+        $yaml = <<<YAML
+!php/const 'Symfony\Component\Yaml\Tests\Command\Foo::TEST': bar
+YAML;
+        $ret = $this->createCommandTester()->execute(array('filename' => $this->createFile($yaml)), array('verbosity' => OutputInterface::VERBOSITY_VERBOSE, 'decorated' => false));
+        $this->assertSame(0, $ret, 'lint:yaml exits with code 0 in case of success');
+    }
+
+    public function testCustomTags()
+    {
+        $yaml = <<<YAML
+foo: !my_tag {foo: bar}
+YAML;
+        $ret = $this->createCommandTester()->execute(array('filename' => $this->createFile($yaml), '--parse-tags' => true), array('verbosity' => OutputInterface::VERBOSITY_VERBOSE, 'decorated' => false));
+        $this->assertSame(0, $ret, 'lint:yaml exits with code 0 in case of success');
+    }
+
+    public function testCustomTagsError()
+    {
+        $yaml = <<<YAML
+foo: !my_tag {foo: bar}
+YAML;
+        $ret = $this->createCommandTester()->execute(array('filename' => $this->createFile($yaml)), array('verbosity' => OutputInterface::VERBOSITY_VERBOSE, 'decorated' => false));
+        $this->assertSame(1, $ret, 'lint:yaml exits with code 1 in case of error');
+    }
+
+    /**
+     * @expectedException \RuntimeException
+     */
+    public function testLintFileNotReadable()
+    {
+        $tester = $this->createCommandTester();
+        $filename = $this->createFile('');
+        unlink($filename);
+
+        $ret = $tester->execute(array('filename' => $filename), array('decorated' => false));
+    }
+
+    /**
+     * @return string Path to the new file
+     */
+    private function createFile($content)
+    {
+        $filename = tempnam(sys_get_temp_dir().'/framework-yml-lint-test', 'sf-');
+        file_put_contents($filename, $content);
+
+        $this->files[] = $filename;
+
+        return $filename;
+    }
+
+    /**
+     * @return CommandTester
+     */
+    protected function createCommandTester()
+    {
+        $application = new Application();
+        $application->add(new LintCommand());
+        $command = $application->find('lint:yaml');
+
+        return new CommandTester($command);
+    }
+
+    protected function setUp()
+    {
+        $this->files = array();
+        @mkdir(sys_get_temp_dir().'/framework-yml-lint-test');
+    }
+
+    protected function tearDown()
+    {
+        foreach ($this->files as $file) {
+            if (file_exists($file)) {
+                unlink($file);
+            }
+        }
+
+        rmdir(sys_get_temp_dir().'/framework-yml-lint-test');
+    }
+}
+
+class Foo
+{
+    const TEST = 'foo';
+}
diff --git a/vendor/symfony/yaml/Tests/DumperTest.php b/vendor/symfony/yaml/Tests/DumperTest.php
new file mode 100644
index 0000000..85dfd5b
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/DumperTest.php
@@ -0,0 +1,429 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Yaml\Tests;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Yaml\Dumper;
+use Symfony\Component\Yaml\Parser;
+use Symfony\Component\Yaml\Yaml;
+
+class DumperTest extends TestCase
+{
+    protected $parser;
+    protected $dumper;
+    protected $path;
+
+    protected $array = array(
+        '' => 'bar',
+        'foo' => '#bar',
+        'foo\'bar' => array(),
+        'bar' => array(1, 'foo'),
+        'foobar' => array(
+            'foo' => 'bar',
+            'bar' => array(1, 'foo'),
+            'foobar' => array(
+                'foo' => 'bar',
+                'bar' => array(1, 'foo'),
+            ),
+        ),
+    );
+
+    protected function setUp()
+    {
+        $this->parser = new Parser();
+        $this->dumper = new Dumper();
+        $this->path = __DIR__.'/Fixtures';
+    }
+
+    protected function tearDown()
+    {
+        $this->parser = null;
+        $this->dumper = null;
+        $this->path = null;
+        $this->array = null;
+    }
+
+    public function testIndentationInConstructor()
+    {
+        $dumper = new Dumper(7);
+        $expected = <<<'EOF'
+'': bar
+foo: '#bar'
+'foo''bar': {  }
+bar:
+       - 1
+       - foo
+foobar:
+       foo: bar
+       bar:
+              - 1
+              - foo
+       foobar:
+              foo: bar
+              bar:
+                     - 1
+                     - foo
+
+EOF;
+        $this->assertEquals($expected, $dumper->dump($this->array, 4, 0));
+    }
+
+    public function testSpecifications()
+    {
+        $files = $this->parser->parse(file_get_contents($this->path.'/index.yml'));
+        foreach ($files as $file) {
+            $yamls = file_get_contents($this->path.'/'.$file.'.yml');
+
+            // split YAMLs documents
+            foreach (preg_split('/^---( %YAML\:1\.0)?/m', $yamls) as $yaml) {
+                if (!$yaml) {
+                    continue;
+                }
+
+                $test = $this->parser->parse($yaml);
+                if (isset($test['dump_skip']) && $test['dump_skip']) {
+                    continue;
+                } elseif (isset($test['todo']) && $test['todo']) {
+                    // TODO
+                } else {
+                    eval('$expected = '.trim($test['php']).';');
+                    $this->assertSame($expected, $this->parser->parse($this->dumper->dump($expected, 10)), $test['test']);
+                }
+            }
+        }
+    }
+
+    public function testInlineLevel()
+    {
+        $expected = <<<'EOF'
+{ '': bar, foo: '#bar', 'foo''bar': {  }, bar: [1, foo], foobar: { foo: bar, bar: [1, foo], foobar: { foo: bar, bar: [1, foo] } } }
+EOF;
+        $this->assertEquals($expected, $this->dumper->dump($this->array, -10), '->dump() takes an inline level argument');
+        $this->assertEquals($expected, $this->dumper->dump($this->array, 0), '->dump() takes an inline level argument');
+
+        $expected = <<<'EOF'
+'': bar
+foo: '#bar'
+'foo''bar': {  }
+bar: [1, foo]
+foobar: { foo: bar, bar: [1, foo], foobar: { foo: bar, bar: [1, foo] } }
+
+EOF;
+        $this->assertEquals($expected, $this->dumper->dump($this->array, 1), '->dump() takes an inline level argument');
+
+        $expected = <<<'EOF'
+'': bar
+foo: '#bar'
+'foo''bar': {  }
+bar:
+    - 1
+    - foo
+foobar:
+    foo: bar
+    bar: [1, foo]
+    foobar: { foo: bar, bar: [1, foo] }
+
+EOF;
+        $this->assertEquals($expected, $this->dumper->dump($this->array, 2), '->dump() takes an inline level argument');
+
+        $expected = <<<'EOF'
+'': bar
+foo: '#bar'
+'foo''bar': {  }
+bar:
+    - 1
+    - foo
+foobar:
+    foo: bar
+    bar:
+        - 1
+        - foo
+    foobar:
+        foo: bar
+        bar: [1, foo]
+
+EOF;
+        $this->assertEquals($expected, $this->dumper->dump($this->array, 3), '->dump() takes an inline level argument');
+
+        $expected = <<<'EOF'
+'': bar
+foo: '#bar'
+'foo''bar': {  }
+bar:
+    - 1
+    - foo
+foobar:
+    foo: bar
+    bar:
+        - 1
+        - foo
+    foobar:
+        foo: bar
+        bar:
+            - 1
+            - foo
+
+EOF;
+        $this->assertEquals($expected, $this->dumper->dump($this->array, 4), '->dump() takes an inline level argument');
+        $this->assertEquals($expected, $this->dumper->dump($this->array, 10), '->dump() takes an inline level argument');
+    }
+
+    public function testObjectSupportEnabled()
+    {
+        $dump = $this->dumper->dump(array('foo' => new A(), 'bar' => 1), 0, 0, Yaml::DUMP_OBJECT);
+
+        $this->assertEquals('{ foo: !php/object \'O:30:"Symfony\Component\Yaml\Tests\A":1:{s:1:"a";s:3:"foo";}\', bar: 1 }', $dump, '->dump() is able to dump objects');
+    }
+
+    public function testObjectSupportDisabledButNoExceptions()
+    {
+        $dump = $this->dumper->dump(array('foo' => new A(), 'bar' => 1));
+
+        $this->assertEquals('{ foo: null, bar: 1 }', $dump, '->dump() does not dump objects when disabled');
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\DumpException
+     */
+    public function testObjectSupportDisabledWithExceptions()
+    {
+        $this->dumper->dump(array('foo' => new A(), 'bar' => 1), 0, 0, Yaml::DUMP_EXCEPTION_ON_INVALID_TYPE);
+    }
+
+    /**
+     * @dataProvider getEscapeSequences
+     */
+    public function testEscapedEscapeSequencesInQuotedScalar($input, $expected)
+    {
+        $this->assertEquals($expected, $this->dumper->dump($input));
+    }
+
+    public function getEscapeSequences()
+    {
+        return array(
+            'empty string' => array('', "''"),
+            'null' => array("\x0", '"\\0"'),
+            'bell' => array("\x7", '"\\a"'),
+            'backspace' => array("\x8", '"\\b"'),
+            'horizontal-tab' => array("\t", '"\\t"'),
+            'line-feed' => array("\n", '"\\n"'),
+            'vertical-tab' => array("\v", '"\\v"'),
+            'form-feed' => array("\xC", '"\\f"'),
+            'carriage-return' => array("\r", '"\\r"'),
+            'escape' => array("\x1B", '"\\e"'),
+            'space' => array(' ', "' '"),
+            'double-quote' => array('"', "'\"'"),
+            'slash' => array('/', '/'),
+            'backslash' => array('\\', '\\'),
+            'next-line' => array("\xC2\x85", '"\\N"'),
+            'non-breaking-space' => array("\xc2\xa0", '"\\_"'),
+            'line-separator' => array("\xE2\x80\xA8", '"\\L"'),
+            'paragraph-separator' => array("\xE2\x80\xA9", '"\\P"'),
+            'colon' => array(':', "':'"),
+        );
+    }
+
+    public function testBinaryDataIsDumpedBase64Encoded()
+    {
+        $binaryData = file_get_contents(__DIR__.'/Fixtures/arrow.gif');
+        $expected = '{ data: !!binary '.base64_encode($binaryData).' }';
+
+        $this->assertSame($expected, $this->dumper->dump(array('data' => $binaryData)));
+    }
+
+    public function testNonUtf8DataIsDumpedBase64Encoded()
+    {
+        // "für" (ISO-8859-1 encoded)
+        $this->assertSame('!!binary ZsM/cg==', $this->dumper->dump("f\xc3\x3fr"));
+    }
+
+    /**
+     * @dataProvider objectAsMapProvider
+     */
+    public function testDumpObjectAsMap($object, $expected)
+    {
+        $yaml = $this->dumper->dump($object, 0, 0, Yaml::DUMP_OBJECT_AS_MAP);
+
+        $this->assertEquals($expected, Yaml::parse($yaml, Yaml::PARSE_OBJECT_FOR_MAP));
+    }
+
+    public function objectAsMapProvider()
+    {
+        $tests = array();
+
+        $bar = new \stdClass();
+        $bar->class = 'classBar';
+        $bar->args = array('bar');
+        $zar = new \stdClass();
+        $foo = new \stdClass();
+        $foo->bar = $bar;
+        $foo->zar = $zar;
+        $object = new \stdClass();
+        $object->foo = $foo;
+        $tests['stdClass'] = array($object, $object);
+
+        $arrayObject = new \ArrayObject();
+        $arrayObject['foo'] = 'bar';
+        $arrayObject['baz'] = 'foobar';
+        $parsedArrayObject = new \stdClass();
+        $parsedArrayObject->foo = 'bar';
+        $parsedArrayObject->baz = 'foobar';
+        $tests['ArrayObject'] = array($arrayObject, $parsedArrayObject);
+
+        $a = new A();
+        $tests['arbitrary-object'] = array($a, null);
+
+        return $tests;
+    }
+
+    public function testDumpingArrayObjectInstancesRespectsInlineLevel()
+    {
+        $deep = new \ArrayObject(array('deep1' => 'd', 'deep2' => 'e'));
+        $inner = new \ArrayObject(array('inner1' => 'b', 'inner2' => 'c', 'inner3' => $deep));
+        $outer = new \ArrayObject(array('outer1' => 'a', 'outer2' => $inner));
+
+        $yaml = $this->dumper->dump($outer, 2, 0, Yaml::DUMP_OBJECT_AS_MAP);
+
+        $expected = <<<YAML
+outer1: a
+outer2:
+    inner1: b
+    inner2: c
+    inner3: { deep1: d, deep2: e }
+
+YAML;
+        $this->assertSame($expected, $yaml);
+    }
+
+    public function testDumpingArrayObjectInstancesWithNumericKeysInlined()
+    {
+        $deep = new \ArrayObject(array('d', 'e'));
+        $inner = new \ArrayObject(array('b', 'c', $deep));
+        $outer = new \ArrayObject(array('a', $inner));
+
+        $yaml = $this->dumper->dump($outer, 0, 0, Yaml::DUMP_OBJECT_AS_MAP);
+        $expected = <<<YAML
+{ 0: a, 1: { 0: b, 1: c, 2: { 0: d, 1: e } } }
+YAML;
+        $this->assertSame($expected, $yaml);
+    }
+
+    public function testDumpingArrayObjectInstancesWithNumericKeysRespectsInlineLevel()
+    {
+        $deep = new \ArrayObject(array('d', 'e'));
+        $inner = new \ArrayObject(array('b', 'c', $deep));
+        $outer = new \ArrayObject(array('a', $inner));
+        $yaml = $this->dumper->dump($outer, 2, 0, Yaml::DUMP_OBJECT_AS_MAP);
+        $expected = <<<YAML
+0: a
+1:
+    0: b
+    1: c
+    2: { 0: d, 1: e }
+
+YAML;
+        $this->assertEquals($expected, $yaml);
+    }
+
+    public function testDumpEmptyArrayObjectInstanceAsMap()
+    {
+        $this->assertSame('{  }', $this->dumper->dump(new \ArrayObject(), 2, 0, Yaml::DUMP_OBJECT_AS_MAP));
+    }
+
+    public function testDumpEmptyStdClassInstanceAsMap()
+    {
+        $this->assertSame('{  }', $this->dumper->dump(new \stdClass(), 2, 0, Yaml::DUMP_OBJECT_AS_MAP));
+    }
+
+    public function testDumpingStdClassInstancesRespectsInlineLevel()
+    {
+        $deep = new \stdClass();
+        $deep->deep1 = 'd';
+        $deep->deep2 = 'e';
+
+        $inner = new \stdClass();
+        $inner->inner1 = 'b';
+        $inner->inner2 = 'c';
+        $inner->inner3 = $deep;
+
+        $outer = new \stdClass();
+        $outer->outer1 = 'a';
+        $outer->outer2 = $inner;
+
+        $yaml = $this->dumper->dump($outer, 2, 0, Yaml::DUMP_OBJECT_AS_MAP);
+
+        $expected = <<<YAML
+outer1: a
+outer2:
+    inner1: b
+    inner2: c
+    inner3: { deep1: d, deep2: e }
+
+YAML;
+        $this->assertSame($expected, $yaml);
+    }
+
+    public function testDumpMultiLineStringAsScalarBlock()
+    {
+        $data = array(
+            'data' => array(
+                'single_line' => 'foo bar baz',
+                'multi_line' => "foo\nline with trailing spaces:\n  \nbar\ninteger like line:\n123456789\nempty line:\n\nbaz",
+                'multi_line_with_carriage_return' => "foo\nbar\r\nbaz",
+                'nested_inlined_multi_line_string' => array(
+                    'inlined_multi_line' => "foo\nbar\r\nempty line:\n\nbaz",
+                ),
+            ),
+        );
+
+        $this->assertSame(file_get_contents(__DIR__.'/Fixtures/multiple_lines_as_literal_block.yml'), $this->dumper->dump($data, 2, 0, Yaml::DUMP_MULTI_LINE_LITERAL_BLOCK));
+    }
+
+    public function testDumpMultiLineStringAsScalarBlockWhenFirstLineHasLeadingSpace()
+    {
+        $data = array(
+            'data' => array(
+                'multi_line' => "    the first line has leading spaces\nThe second line does not.",
+            ),
+        );
+
+        $this->assertSame(file_get_contents(__DIR__.'/Fixtures/multiple_lines_as_literal_block_leading_space_in_first_line.yml'), $this->dumper->dump($data, 2, 0, Yaml::DUMP_MULTI_LINE_LITERAL_BLOCK));
+    }
+
+    public function testCarriageReturnIsMaintainedWhenDumpingAsMultiLineLiteralBlock()
+    {
+        $this->assertSame("- \"a\\r\\nb\\nc\"\n", $this->dumper->dump(array("a\r\nb\nc"), 2, 0, Yaml::DUMP_MULTI_LINE_LITERAL_BLOCK));
+    }
+
+    /**
+     * @expectedException \InvalidArgumentException
+     * @expectedExceptionMessage The indentation must be greater than zero
+     */
+    public function testZeroIndentationThrowsException()
+    {
+        new Dumper(0);
+    }
+
+    /**
+     * @expectedException \InvalidArgumentException
+     * @expectedExceptionMessage The indentation must be greater than zero
+     */
+    public function testNegativeIndentationThrowsException()
+    {
+        new Dumper(-4);
+    }
+}
+
+class A
+{
+    public $a = 'foo';
+}
diff --git a/vendor/symfony/yaml/Tests/Fixtures/YtsAnchorAlias.yml b/vendor/symfony/yaml/Tests/Fixtures/YtsAnchorAlias.yml
new file mode 100644
index 0000000..5f9c942
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/Fixtures/YtsAnchorAlias.yml
@@ -0,0 +1,31 @@
+--- %YAML:1.0
+test: Simple Alias Example
+brief: >
+    If you need to refer to the same item of data twice,
+    you can give that item an alias.  The alias is a plain
+    string, starting with an ampersand.  The item may then
+    be referred to by the alias throughout your document
+    by using an asterisk before the name of the alias.
+    This is called an anchor.
+yaml: |
+    - &showell Steve
+    - Clark
+    - Brian
+    - Oren
+    - *showell
+php: |
+    array('Steve', 'Clark', 'Brian', 'Oren', 'Steve')
+
+---
+test: Alias of a Mapping
+brief: >
+    An alias can be used on any item of data, including
+    sequences, mappings, and other complex data types.
+yaml: |
+    - &hello
+        Meat: pork
+        Starch: potato
+    - banana
+    - *hello
+php: |
+    array(array('Meat'=>'pork', 'Starch'=>'potato'), 'banana', array('Meat'=>'pork', 'Starch'=>'potato'))
diff --git a/vendor/symfony/yaml/Tests/Fixtures/YtsBasicTests.yml b/vendor/symfony/yaml/Tests/Fixtures/YtsBasicTests.yml
new file mode 100644
index 0000000..dfd9302
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/Fixtures/YtsBasicTests.yml
@@ -0,0 +1,202 @@
+--- %YAML:1.0
+test: Simple Sequence
+brief: |
+    You can specify a list in YAML by placing each
+    member of the list on a new line with an opening
+    dash. These lists are called sequences.
+yaml: |
+    - apple
+    - banana
+    - carrot
+php: |
+    array('apple', 'banana', 'carrot')
+---
+test: Sequence With Item Being Null In The Middle
+brief: |
+    You can specify a list in YAML by placing each
+    member of the list on a new line with an opening
+    dash. These lists are called sequences.
+yaml: |
+    - apple
+    -
+    - carrot
+php: |
+    array('apple', null, 'carrot')
+---
+test: Sequence With Last Item Being Null
+brief: |
+    You can specify a list in YAML by placing each
+    member of the list on a new line with an opening
+    dash. These lists are called sequences.
+yaml: |
+    - apple
+    - banana
+    -
+php: |
+    array('apple', 'banana', null)
+---
+test: Nested Sequences
+brief: |
+    You can include a sequence within another
+    sequence by giving the sequence an empty
+    dash, followed by an indented list.
+yaml: |
+    -
+     - foo
+     - bar
+     - baz
+php: |
+    array(array('foo', 'bar', 'baz'))
+---
+test: Mixed Sequences
+brief: |
+    Sequences can contain any YAML data,
+    including strings and other sequences.
+yaml: |
+    - apple
+    -
+     - foo
+     - bar
+     - x123
+    - banana
+    - carrot
+php: |
+    array('apple', array('foo', 'bar', 'x123'), 'banana', 'carrot')
+---
+test: Deeply Nested Sequences
+brief: |
+    Sequences can be nested even deeper, with each
+    level of indentation representing a level of
+    depth.
+yaml: |
+    -
+     -
+      - uno
+      - dos
+php: |
+    array(array(array('uno', 'dos')))
+---
+test: Simple Mapping
+brief: |
+    You can add a keyed list (also known as a dictionary or
+    hash) to your document by placing each member of the
+    list on a new line, with a colon separating the key
+    from its value.  In YAML, this type of list is called
+    a mapping.
+yaml: |
+    foo: whatever
+    bar: stuff
+php: |
+    array('foo' => 'whatever', 'bar' => 'stuff')
+---
+test: Sequence in a Mapping
+brief: |
+    A value in a mapping can be a sequence.
+yaml: |
+    foo: whatever
+    bar:
+     - uno
+     - dos
+php: |
+    array('foo' => 'whatever', 'bar' => array('uno', 'dos'))
+---
+test: Nested Mappings
+brief: |
+    A value in a mapping can be another mapping.
+yaml: |
+    foo: whatever
+    bar:
+     fruit: apple
+     name: steve
+     sport: baseball
+php: |
+    array(
+      'foo' => 'whatever',
+      'bar' => array(
+         'fruit' => 'apple',
+         'name' => 'steve',
+         'sport' => 'baseball'
+       )
+    )
+---
+test: Mixed Mapping
+brief: |
+    A mapping can contain any assortment
+    of mappings and sequences as values.
+yaml: |
+    foo: whatever
+    bar:
+     -
+       fruit: apple
+       name: steve
+       sport: baseball
+     - more
+     -
+       python: rocks
+       perl: papers
+       ruby: scissorses
+php: |
+    array(
+      'foo' => 'whatever',
+      'bar' => array(
+        array(
+            'fruit' => 'apple',
+            'name' => 'steve',
+            'sport' => 'baseball'
+        ),
+        'more',
+        array(
+            'python' => 'rocks',
+            'perl' => 'papers',
+            'ruby' => 'scissorses'
+        )
+      )
+    )
+---
+test: Mapping-in-Sequence Shortcut
+todo: true
+brief: |
+     If you are adding a mapping to a sequence, you
+     can place the mapping on the same line as the
+     dash as a shortcut.
+yaml: |
+     - work on YAML.py:
+        - work on Store
+php: |
+    array(array('work on YAML.py' => array('work on Store')))
+---
+test: Sequence-in-Mapping Shortcut
+todo: true
+brief: |
+     The dash in a sequence counts as indentation, so
+     you can add a sequence inside of a mapping without
+     needing spaces as indentation.
+yaml: |
+     allow:
+     - 'localhost'
+     - '%.sourceforge.net'
+     - '%.freepan.org'
+php: |
+     array('allow' => array('localhost', '%.sourceforge.net', '%.freepan.org'))
+---
+todo: true
+test: Merge key
+brief: |
+     A merge key ('<<') can be used in a mapping to insert other mappings.  If
+     the value associated with the merge key is a mapping, each of its key/value
+     pairs is inserted into the current mapping.
+yaml: |
+     mapping:
+       name: Joe
+       job: Accountant
+       <<:
+         age: 38
+php: |
+     array(
+       'mapping' =>
+       array(
+         'name' => 'Joe',
+         'job' => 'Accountant',
+         'age' => 38
+       )
+     )
diff --git a/vendor/symfony/yaml/Tests/Fixtures/YtsBlockMapping.yml b/vendor/symfony/yaml/Tests/Fixtures/YtsBlockMapping.yml
new file mode 100644
index 0000000..f7ca469
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/Fixtures/YtsBlockMapping.yml
@@ -0,0 +1,51 @@
+---
+test: One Element Mapping
+brief: |
+    A mapping with one key/value pair
+yaml: |
+    foo: bar
+php: |
+    array('foo' => 'bar')
+---
+test: Multi Element Mapping
+brief: |
+    More than one key/value pair
+yaml: |
+    red: baron
+    white: walls
+    blue: berries
+php: |
+    array(
+     'red' => 'baron',
+     'white' => 'walls',
+     'blue' => 'berries',
+    )
+---
+test: Values aligned
+brief: |
+    Often times human editors of documents will align the values even
+    though YAML emitters generally don't.
+yaml: |
+    red:   baron
+    white: walls
+    blue:  berries
+php: |
+    array(
+     'red' => 'baron',
+     'white' => 'walls',
+     'blue' => 'berries',
+    )
+---
+test: Colons aligned
+brief: |
+    Spaces can come before the ': ' key/value separator.
+yaml: |
+    red   : baron
+    white : walls
+    blue  : berries
+php: |
+    array(
+     'red' => 'baron',
+     'white' => 'walls',
+     'blue' => 'berries',
+    )
diff --git a/vendor/symfony/yaml/Tests/Fixtures/YtsDocumentSeparator.yml b/vendor/symfony/yaml/Tests/Fixtures/YtsDocumentSeparator.yml
new file mode 100644
index 0000000..d988102
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/Fixtures/YtsDocumentSeparator.yml
@@ -0,0 +1,85 @@
+--- %YAML:1.0
+test: Trailing Document Separator
+todo: true
+brief: >
+    You can separate YAML documents
+    with a string of three dashes.
+yaml: |
+    - foo: 1
+      bar: 2
+    ---
+    more: stuff
+python: |
+    [
+        [ { 'foo': 1, 'bar': 2 } ],
+        { 'more': 'stuff' }
+    ]
+ruby: |
+    [ { 'foo' => 1, 'bar' => 2 } ]
+
+---
+test: Leading Document Separator
+todo: true
+brief: >
+    You can explicitly give an opening
+    document separator to your YAML stream.
+yaml: |
+    ---
+    - foo: 1
+      bar: 2
+    ---
+    more: stuff
+python: |
+    [
+        [ {'foo': 1, 'bar': 2}],
+        {'more': 'stuff'}
+    ]
+ruby: |
+    [ { 'foo' => 1, 'bar' => 2 } ]
+
+---
+test: YAML Header
+todo: true
+brief: >
+    The opening separator can contain directives
+    to the YAML parser, such as the version
+    number.
+yaml: |
+    --- %YAML:1.0
+    foo: 1
+    bar: 2
+php: |
+    array('foo' => 1, 'bar' => 2)
+documents: 1
+
+---
+test: Red Herring Document Separator
+brief: >
+    Separators included in blocks or strings
+    are treated as blocks or strings, as the
+    document separator should have no indentation
+    preceding it.
+yaml: |
+    foo: |
+        ---
+php: |
+    array('foo' => "---\n")
+
+---
+test: Multiple Document Separators in Block
+brief: >
+    This technique allows you to embed other YAML
+    documents within literal blocks.
+yaml: |
+    foo: |
+        ---
+        foo: bar
+        ---
+        yo: baz
+    bar: |
+        fooness
+php: |
+    array(
+       'foo' => "---\nfoo: bar\n---\nyo: baz\n",
+       'bar' => "fooness\n"
+    )
diff --git a/vendor/symfony/yaml/Tests/Fixtures/YtsErrorTests.yml b/vendor/symfony/yaml/Tests/Fixtures/YtsErrorTests.yml
new file mode 100644
index 0000000..e8506fc
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/Fixtures/YtsErrorTests.yml
@@ -0,0 +1,25 @@
+---
+test: Missing value for hash item
+todo: true
+brief: |
+    Third item in this hash doesn't have a value
+yaml: |
+    okay: value
+    also okay: ~
+    causes error because no value specified
+    last key: value okay here too
+python-error: causes error because no value specified
+
+---
+test: Not indenting enough
+brief: |
+    There was a bug in PyYaml where it was off by one
+    in the indentation check.  It was allowing the YAML
+    below.
+# This is actually valid YAML now. Someone should tell showell.
+yaml: |
+    foo:
+    firstline: 1
+    secondline: 2
+php: |
+  array('foo' => null, 'firstline' => 1, 'secondline' => 2)
diff --git a/vendor/symfony/yaml/Tests/Fixtures/YtsFlowCollections.yml b/vendor/symfony/yaml/Tests/Fixtures/YtsFlowCollections.yml
new file mode 100644
index 0000000..03090e4
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/Fixtures/YtsFlowCollections.yml
@@ -0,0 +1,60 @@
+---
+test: Simple Inline Array
+brief: >
+    Sequences can be contained on a
+    single line, using the inline syntax.
+    Separate each entry with commas and
+    enclose in square brackets.
+yaml: |
+    seq: [ a, b, c ]
+php: |
+    array('seq' => array('a', 'b', 'c'))
+---
+test: Simple Inline Hash
+brief: >
+    Mapping can also be contained on
+    a single line, using the inline
+    syntax.  Each key-value pair is
+    separated by a colon, with a comma
+    between each entry in the mapping.
+    Enclose with curly braces.
+yaml: |
+    hash: { name: Steve, foo: bar }
+php: |
+    array('hash' => array('name' => 'Steve', 'foo' => 'bar'))
+---
+test: Multi-line Inline Collections
+todo: true
+brief: >
+    Both inline sequences and inline mappings
+    can span multiple lines, provided that you
+    indent the additional lines.
+yaml: |
+    languages: [ Ruby,
+                 Perl,
+                 Python ]
+    websites: { YAML: yaml.org,
+                Ruby: ruby-lang.org,
+                Python: python.org,
+                Perl: use.perl.org }
+php: |
+    array(
+      'languages' => array('Ruby', 'Perl', 'Python'),
+      'websites' => array(
+        'YAML' => 'yaml.org',
+        'Ruby' => 'ruby-lang.org',
+        'Python' => 'python.org',
+        'Perl' => 'use.perl.org'
+      )
+    )
+---
+test: Commas in Values (not in the spec!)
+todo: true
+brief: >
+    List items in collections are delimited by commas, but
+    there must be a space after each comma.  This allows you
+    to add numbers without quoting.
+yaml: |
+    attendances: [ 45,123, 70,000, 17,222 ]
+php: |
+    array('attendances' => array(45123, 70000, 17222))
diff --git a/vendor/symfony/yaml/Tests/Fixtures/YtsFoldedScalars.yml b/vendor/symfony/yaml/Tests/Fixtures/YtsFoldedScalars.yml
new file mode 100644
index 0000000..a14735a
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/Fixtures/YtsFoldedScalars.yml
@@ -0,0 +1,176 @@
+--- %YAML:1.0
+test: Single ending newline
+brief: >
+    A pipe character, followed by an indented
+    block of text is treated as a literal
+    block, in which newlines are preserved
+    throughout the block, including the final
+    newline.
+yaml: |
+    ---
+    this: |
+        Foo
+        Bar
+php: |
+    array('this' => "Foo\nBar\n")
+---
+test: The '+' indicator
+brief: >
+    The '+' indicator says to keep newlines at the end of text
+    blocks.
+yaml: |
+    normal: |
+      extra new lines not kept
+
+    preserving: |+
+      extra new lines are kept
+
+
+    dummy: value
+php: |
+    array(
+        'normal' => "extra new lines not kept\n",
+        'preserving' => "extra new lines are kept\n\n\n",
+        'dummy' => 'value'
+    )
+---
+test: Three trailing newlines in literals
+brief: >
+    To give you more control over how space
+    is preserved in text blocks, YAML has
+    the keep '+' and chomp '-' indicators.
+    The keep indicator will preserve all
+    ending newlines, while the chomp indicator
+    will strip all ending newlines.
+yaml: |
+    clipped: |
+        This has one newline.
+
+
+
+    same as "clipped" above: "This has one newline.\n"
+
+    stripped: |-
+        This has no newline.
+
+
+
+    same as "stripped" above: "This has no newline."
+
+    kept: |+
+        This has four newlines.
+
+
+
+    same as "kept" above: "This has four newlines.\n\n\n\n"
+php: |
+    array(
+      'clipped' => "This has one newline.\n",
+      'same as "clipped" above' => "This has one newline.\n",
+      'stripped' => 'This has no newline.',
+      'same as "stripped" above' => 'This has no newline.',
+      'kept' => "This has four newlines.\n\n\n\n",
+      'same as "kept" above' => "This has four newlines.\n\n\n\n"
+    )
+---
+test: Extra trailing newlines with spaces
+todo: true
+brief: >
+    Normally, only a single newline is kept
+    from the end of a literal block, unless the
+    keep '+' character is used in combination
+    with the pipe.  The following example
+    will preserve all ending whitespace
+    since the last line of both literal blocks
+    contains spaces which extend past the indentation
+    level.
+yaml: |
+    ---
+    this: |
+        Foo
+
+
+    kept: |+
+        Foo
+
+
+php: |
+    array('this' => "Foo\n\n  \n",
+      'kept' => "Foo\n\n  \n" )
+
+---
+test: Folded Block in a Sequence
+brief: >
+    A greater-then character, followed by an indented
+    block of text is treated as a folded block, in
+    which lines of text separated by a single newline
+    are concatenated as a single line.
+yaml: |
+    ---
+    - apple
+    - banana
+    - >
+        can't you see
+        the beauty of yaml?
+        hmm
+    - dog
+php: |
+    array(
+        'apple',
+        'banana',
+        "can't you see the beauty of yaml? hmm\n",
+        'dog'
+    )
+---
+test: Folded Block as a Mapping Value
+brief: >
+    Both literal and folded blocks can be
+    used in collections, as values in a
+    sequence or a mapping.
+yaml: |
+    ---
+    quote: >
+        Mark McGwire's
+        year was crippled
+        by a knee injury.
+    source: espn
+php: |
+    array(
+        'quote' => "Mark McGwire's year was crippled by a knee injury.\n",
+        'source' => 'espn'
+    )
+---
+test: Three trailing newlines in folded blocks
+brief: >
+    The keep and chomp indicators can also
+    be applied to folded blocks.
+yaml: |
+    clipped: >
+        This has one newline.
+
+
+
+    same as "clipped" above: "This has one newline.\n"
+
+    stripped: >-
+        This has no newline.
+
+
+
+    same as "stripped" above: "This has no newline."
+
+    kept: >+
+        This has four newlines.
+
+
+
+    same as "kept" above: "This has four newlines.\n\n\n\n"
+php: |
+    array(
+      'clipped' => "This has one newline.\n",
+      'same as "clipped" above' => "This has one newline.\n",
+      'stripped' => 'This has no newline.',
+      'same as "stripped" above' => 'This has no newline.',
+      'kept' => "This has four newlines.\n\n\n\n",
+      'same as "kept" above' => "This has four newlines.\n\n\n\n"
+    )
diff --git a/vendor/symfony/yaml/Tests/Fixtures/YtsNullsAndEmpties.yml b/vendor/symfony/yaml/Tests/Fixtures/YtsNullsAndEmpties.yml
new file mode 100644
index 0000000..9a5300f
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/Fixtures/YtsNullsAndEmpties.yml
@@ -0,0 +1,45 @@
+--- %YAML:1.0
+test: Empty Sequence
+brief: >
+    You can represent the empty sequence
+    with an empty inline sequence.
+yaml: |
+    empty: []
+php: |
+    array('empty' => array())
+---
+test: Empty Mapping
+brief: >
+    You can represent the empty mapping
+    with an empty inline mapping.
+yaml: |
+    empty: {}
+php: |
+    array('empty' => array())
+---
+test: Empty Sequence as Entire Document
+yaml: |
+    []
+php: |
+    array()
+---
+test: Empty Mapping as Entire Document
+yaml: |
+    {}
+php: |
+    array()
+---
+test: Null as Document
+yaml: |
+    ~
+php: |
+    null
+---
+test: Empty String
+brief: >
+    You can represent an empty string
+    with a pair of quotes.
+yaml: |
+    ''
+php: |
+    ''
diff --git a/vendor/symfony/yaml/Tests/Fixtures/YtsSpecificationExamples.yml b/vendor/symfony/yaml/Tests/Fixtures/YtsSpecificationExamples.yml
new file mode 100644
index 0000000..3ee795a
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/Fixtures/YtsSpecificationExamples.yml
@@ -0,0 +1,1662 @@
+--- %YAML:1.0
+test: Sequence of scalars
+spec: 2.1
+yaml: |
+  - Mark McGwire
+  - Sammy Sosa
+  - Ken Griffey
+php: |
+  array('Mark McGwire', 'Sammy Sosa', 'Ken Griffey')
+---
+test: Mapping of scalars to scalars
+spec: 2.2
+yaml: |
+  hr:  65
+  avg: 0.278
+  rbi: 147
+php: |
+  array('hr' => 65, 'avg' => 0.278, 'rbi' => 147)
+---
+test: Mapping of scalars to sequences
+spec: 2.3
+yaml: |
+    american:
+       - Boston Red Sox
+       - Detroit Tigers
+       - New York Yankees
+    national:
+       - New York Mets
+       - Chicago Cubs
+       - Atlanta Braves
+php: |
+    array('american' =>
+        array( 'Boston Red Sox', 'Detroit Tigers',
+          'New York Yankees' ),
+      'national' =>
+        array( 'New York Mets', 'Chicago Cubs',
+          'Atlanta Braves' )
+    )
+---
+test: Sequence of mappings
+spec: 2.4
+yaml: |
+    -
+      name: Mark McGwire
+      hr:   65
+      avg:  0.278
+    -
+      name: Sammy Sosa
+      hr:   63
+      avg:  0.288
+php: |
+    array(
+      array('name' => 'Mark McGwire', 'hr' => 65, 'avg' => 0.278),
+      array('name' => 'Sammy Sosa', 'hr' => 63, 'avg' => 0.288)
+    )
+---
+test: Legacy A5
+todo: true
+spec: legacy_A5
+yaml: |
+    ?
+        - New York Yankees
+        - Atlanta Braves
+    :
+      - 2001-07-02
+      - 2001-08-12
+      - 2001-08-14
+    ?
+        - Detroit Tigers
+        - Chicago Cubs
+    :
+      - 2001-07-23
+perl-busted: >
+    YAML.pm will be able to emulate this behavior soon. In this regard
+    it may be somewhat more correct than Python's native behaviour which
+    can only use tuples as mapping keys. PyYAML will also need to figure
+    out some clever way to roundtrip structured keys.
+python: |
+    [
+    {
+        ('New York Yankees', 'Atlanta Braves'):
+            [yaml.timestamp('2001-07-02'),
+             yaml.timestamp('2001-08-12'),
+             yaml.timestamp('2001-08-14')],
+        ('Detroit Tigers', 'Chicago Cubs'):
+        [yaml.timestamp('2001-07-23')]
+    }
+    ]
+ruby: |
+    {
+      [ 'New York Yankees', 'Atlanta Braves' ] =>
+        [ Date.new( 2001, 7, 2 ), Date.new( 2001, 8, 12 ), Date.new( 2001, 8, 14 ) ],
+      [ 'Detroit Tigers', 'Chicago Cubs' ] =>
+        [ Date.new( 2001, 7, 23 ) ]
+    }
+syck: |
+  struct test_node seq1[] = {
+      { T_STR, 0, "New York Yankees" },
+      { T_STR, 0, "Atlanta Braves" },
+      end_node
+  };
+  struct test_node seq2[] = {
+      { T_STR, 0, "2001-07-02" },
+      { T_STR, 0, "2001-08-12" },
+      { T_STR, 0, "2001-08-14" },
+      end_node
+  };
+  struct test_node seq3[] = {
+      { T_STR, 0, "Detroit Tigers" },
+      { T_STR, 0, "Chicago Cubs" },
+      end_node
+  };
+  struct test_node seq4[] = {
+      { T_STR, 0, "2001-07-23" },
+      end_node
+  };
+  struct test_node map[] = {
+      { T_SEQ, 0, 0, seq1 },
+      { T_SEQ, 0, 0, seq2 },
+      { T_SEQ, 0, 0, seq3 },
+      { T_SEQ, 0, 0, seq4 },
+      end_node
+  };
+  struct test_node stream[] = {
+      { T_MAP, 0, 0, map },
+      end_node
+  };
+
+---
+test: Sequence of sequences
+spec: 2.5
+yaml: |
+  - [ name         , hr , avg   ]
+  - [ Mark McGwire , 65 , 0.278 ]
+  - [ Sammy Sosa   , 63 , 0.288 ]
+php: |
+  array(
+    array( 'name', 'hr', 'avg' ),
+    array( 'Mark McGwire', 65, 0.278 ),
+    array( 'Sammy Sosa', 63, 0.288 )
+  )
+---
+test: Mapping of mappings
+todo: true
+spec: 2.6
+yaml: |
+  Mark McGwire: {hr: 65, avg: 0.278}
+  Sammy Sosa: {
+      hr: 63,
+      avg: 0.288
+    }
+php: |
+  array(
+    'Mark McGwire' =>
+      array( 'hr' => 65, 'avg' => 0.278 ),
+    'Sammy Sosa' =>
+      array( 'hr' => 63, 'avg' => 0.288 )
+  )
+---
+test: Two documents in a stream each with a leading comment
+todo: true
+spec: 2.7
+yaml: |
+  # Ranking of 1998 home runs
+  ---
+  - Mark McGwire
+  - Sammy Sosa
+  - Ken Griffey
+
+  # Team ranking
+  ---
+  - Chicago Cubs
+  - St Louis Cardinals
+ruby: |
+  y = YAML::Stream.new
+  y.add( [ 'Mark McGwire', 'Sammy Sosa', 'Ken Griffey' ] )
+  y.add( [ 'Chicago Cubs', 'St Louis Cardinals' ] )
+documents: 2
+
+---
+test: Play by play feed from a game
+todo: true
+spec: 2.8
+yaml: |
+  ---
+  time: 20:03:20
+  player: Sammy Sosa
+  action: strike (miss)
+  ...
+  ---
+  time: 20:03:47
+  player: Sammy Sosa
+  action: grand slam
+  ...
+perl: |
+  [ 'Mark McGwire', 'Sammy Sosa', 'Ken Griffey' ]
+documents: 2
+
+---
+test: Single document with two comments
+spec: 2.9
+yaml: |
+  hr: # 1998 hr ranking
+    - Mark McGwire
+    - Sammy Sosa
+  rbi:
+    # 1998 rbi ranking
+    - Sammy Sosa
+    - Ken Griffey
+php: |
+  array(
+    'hr' => array( 'Mark McGwire', 'Sammy Sosa' ),
+    'rbi' => array( 'Sammy Sosa', 'Ken Griffey' )
+  )
+---
+test: Node for Sammy Sosa appears twice in this document
+spec: 2.10
+yaml: |
+   ---
+   hr:
+      - Mark McGwire
+      # Following node labeled SS
+      - &SS Sammy Sosa
+   rbi:
+      - *SS # Subsequent occurrence
+      - Ken Griffey
+php: |
+   array(
+      'hr' =>
+         array('Mark McGwire', 'Sammy Sosa'),
+      'rbi' =>
+         array('Sammy Sosa', 'Ken Griffey')
+   )
+---
+test: Mapping between sequences
+todo: true
+spec: 2.11
+yaml: |
+   ? # PLAY SCHEDULE
+     - Detroit Tigers
+     - Chicago Cubs
+   :
+     - 2001-07-23
+
+   ? [ New York Yankees,
+       Atlanta Braves ]
+   : [ 2001-07-02, 2001-08-12,
+       2001-08-14 ]
+ruby: |
+   {
+      [ 'Detroit Tigers', 'Chicago Cubs' ] => [ Date.new( 2001, 7, 23 ) ],
+      [ 'New York Yankees', 'Atlanta Braves' ] => [ Date.new( 2001, 7, 2 ), Date.new( 2001, 8, 12 ), Date.new( 2001, 8, 14 ) ]
+   }
+syck: |
+  struct test_node seq1[] = {
+      { T_STR, 0, "New York Yankees" },
+      { T_STR, 0, "Atlanta Braves" },
+      end_node
+  };
+  struct test_node seq2[] = {
+      { T_STR, 0, "2001-07-02" },
+      { T_STR, 0, "2001-08-12" },
+      { T_STR, 0, "2001-08-14" },
+      end_node
+  };
+  struct test_node seq3[] = {
+      { T_STR, 0, "Detroit Tigers" },
+      { T_STR, 0, "Chicago Cubs" },
+      end_node
+  };
+  struct test_node seq4[] = {
+      { T_STR, 0, "2001-07-23" },
+      end_node
+  };
+  struct test_node map[] = {
+      { T_SEQ, 0, 0, seq3 },
+      { T_SEQ, 0, 0, seq4 },
+      { T_SEQ, 0, 0, seq1 },
+      { T_SEQ, 0, 0, seq2 },
+      end_node
+  };
+  struct test_node stream[] = {
+      { T_MAP, 0, 0, map },
+      end_node
+  };
+
+---
+test: Sequence key shortcut
+spec: 2.12
+yaml: |
+  ---
+  # products purchased
+  - item    : Super Hoop
+    quantity: 1
+  - item    : Basketball
+    quantity: 4
+  - item    : Big Shoes
+    quantity: 1
+php: |
+  array (
+    array (
+      'item' => 'Super Hoop',
+      'quantity' => 1,
+    ),
+    array (
+      'item' => 'Basketball',
+      'quantity' => 4,
+    ),
+    array (
+      'item' => 'Big Shoes',
+      'quantity' => 1,
+    )
+  )
+perl: |
+  [
+     { item => 'Super Hoop', quantity => 1 },
+     { item => 'Basketball', quantity => 4 },
+     { item => 'Big Shoes',  quantity => 1 }
+  ]
+
+ruby: |
+  [
+     { 'item' => 'Super Hoop', 'quantity' => 1 },
+     { 'item' => 'Basketball', 'quantity' => 4 },
+     { 'item' => 'Big Shoes', 'quantity' => 1 }
+  ]
+python: |
+  [
+       { 'item': 'Super Hoop', 'quantity': 1 },
+       { 'item': 'Basketball', 'quantity': 4 },
+       { 'item': 'Big Shoes',  'quantity': 1 }
+  ]
+syck: |
+  struct test_node map1[] = {
+      { T_STR, 0, "item" },
+          { T_STR, 0, "Super Hoop" },
+      { T_STR, 0, "quantity" },
+          { T_STR, 0, "1" },
+      end_node
+  };
+  struct test_node map2[] = {
+      { T_STR, 0, "item" },
+          { T_STR, 0, "Basketball" },
+      { T_STR, 0, "quantity" },
+          { T_STR, 0, "4" },
+      end_node
+  };
+  struct test_node map3[] = {
+      { T_STR, 0, "item" },
+          { T_STR, 0, "Big Shoes" },
+      { T_STR, 0, "quantity" },
+          { T_STR, 0, "1" },
+      end_node
+  };
+  struct test_node seq[] = {
+      { T_MAP, 0, 0, map1 },
+      { T_MAP, 0, 0, map2 },
+      { T_MAP, 0, 0, map3 },
+      end_node
+  };
+  struct test_node stream[] = {
+      { T_SEQ, 0, 0, seq },
+      end_node
+  };
+
+
+---
+test: Literal perserves newlines
+todo: true
+spec: 2.13
+yaml: |
+  # ASCII Art
+  --- |
+    \//||\/||
+    // ||  ||_
+perl: |
+  "\\//||\\/||\n// ||  ||_\n"
+ruby: |
+  "\\//||\\/||\n// ||  ||_\n"
+python: |
+    [
+        flushLeft(
+        """
+        \//||\/||
+        // ||  ||_
+        """
+        )
+    ]
+syck: |
+  struct test_node stream[] = {
+      { T_STR, 0, "\\//||\\/||\n// ||  ||_\n" },
+      end_node
+  };
+
+---
+test: Folded treats newlines as a space
+todo: true
+spec: 2.14
+yaml: |
+  ---
+    Mark McGwire's
+    year was crippled
+    by a knee injury.
+perl: |
+  "Mark McGwire's year was crippled by a knee injury."
+ruby: |
+  "Mark McGwire's year was crippled by a knee injury."
+python: |
+    [ "Mark McGwire's year was crippled by a knee injury." ]
+syck: |
+  struct test_node stream[] = {
+      { T_STR, 0, "Mark McGwire's year was crippled by a knee injury." },
+      end_node
+  };
+
+---
+test: Newlines preserved for indented and blank lines
+todo: true
+spec: 2.15
+yaml: |
+  --- >
+   Sammy Sosa completed another
+   fine season with great stats.
+
+     63 Home Runs
+     0.288 Batting Average
+
+   What a year!
+perl: |
+  "Sammy Sosa completed another fine season with great stats.\n\n  63 Home Runs\n  0.288 Batting Average\n\nWhat a year!\n"
+ruby: |
+  "Sammy Sosa completed another fine season with great stats.\n\n  63 Home Runs\n  0.288 Batting Average\n\nWhat a year!\n"
+python: |
+    [
+        flushLeft(
+        """
+        Sammy Sosa completed another fine season with great stats.
+
+          63 Home Runs
+          0.288 Batting Average
+
+        What a year!
+        """
+        )
+    ]
+syck: |
+  struct test_node stream[] = {
+      { T_STR, 0, "Sammy Sosa completed another fine season with great stats.\n\n  63 Home Runs\n  0.288 Batting Average\n\nWhat a year!\n" },
+      end_node
+  };
+
+
+---
+test: Indentation determines scope
+spec: 2.16
+yaml: |
+  name: Mark McGwire
+  accomplishment: >
+     Mark set a major league
+     home run record in 1998.
+  stats: |
+     65 Home Runs
+     0.278 Batting Average
+php: |
+  array(
+    'name' => 'Mark McGwire',
+    'accomplishment' => "Mark set a major league home run record in 1998.\n",
+    'stats' => "65 Home Runs\n0.278 Batting Average\n"
+  )
+---
+test: Quoted scalars
+todo: true
+spec: 2.17
+yaml: |
+  unicode: "Sosa did fine.\u263A"
+  control: "\b1998\t1999\t2000\n"
+  hexesc:  "\x0D\x0A is \r\n"
+
+  single: '"Howdy!" he cried.'
+  quoted: ' # not a ''comment''.'
+  tie-fighter: '|\-*-/|'
+ruby: |
+  {
+    "tie-fighter" => "|\\-*-/|",
+    "control"=>"\0101998\t1999\t2000\n",
+    "unicode"=>"Sosa did fine." + ["263A".hex ].pack('U*'),
+    "quoted"=>" # not a 'comment'.",
+    "single"=>"\"Howdy!\" he cried.",
+    "hexesc"=>"\r\n is \r\n"
+  }
+---
+test: Multiline flow scalars
+todo: true
+spec: 2.18
+yaml: |
+  plain:
+    This unquoted scalar
+    spans many lines.
+
+  quoted: "So does this
+    quoted scalar.\n"
+ruby: |
+  {
+    'plain' => 'This unquoted scalar spans many lines.',
+    'quoted' => "So does this quoted scalar.\n"
+  }
+---
+test: Integers
+spec: 2.19
+yaml: |
+  canonical: 12345
+  octal: 014
+  hexadecimal: 0xC
+php: |
+  array(
+    'canonical' => 12345,
+    'octal' => 014,
+    'hexadecimal' => 0xC
+  )
+---
+# FIX: spec shows parens around -inf and NaN
+test: Floating point
+spec: 2.20
+yaml: |
+  canonical: 1.23015e+3
+  exponential: 12.3015e+02
+  negative infinity: -.inf
+  not a number: .NaN
+  float as whole number: !!float 1
+php: |
+  array(
+    'canonical' => 1230.15,
+    'exponential' => 1230.15,
+    'negative infinity' => log(0),
+    'not a number' => -log(0),
+    'float as whole number' => (float) 1
+  )
+---
+test: Timestamps
+todo: true
+spec: 2.22
+yaml: |
+  canonical: 2001-12-15T02:59:43.1Z
+  iso8601:  2001-12-14t21:59:43.10-05:00
+  spaced:  2001-12-14 21:59:43.10 -05:00
+  date:   2002-12-14 # Time is noon UTC
+php: |
+  array(
+    'canonical' => YAML::mktime( 2001, 12, 15, 2, 59, 43, 0.10 ),
+    'iso8601' => YAML::mktime( 2001, 12, 14, 21, 59, 43, 0.10, "-05:00" ),
+    'spaced' => YAML::mktime( 2001, 12, 14, 21, 59, 43, 0.10, "-05:00" ),
+    'date' => Date.new( 2002, 12, 14 )
+  )
+---
+test: legacy Timestamps test
+todo: true
+spec: legacy D4
+yaml: |
+    canonical: 2001-12-15T02:59:43.00Z
+    iso8601:  2001-02-28t21:59:43.00-05:00
+    spaced:  2001-12-14 21:59:43.00 -05:00
+    date:   2002-12-14
+php: |
+   array(
+     'canonical' => Time::utc( 2001, 12, 15, 2, 59, 43, 0 ),
+     'iso8601' => YAML::mktime( 2001, 2, 28, 21, 59, 43, 0, "-05:00" ),
+     'spaced' => YAML::mktime( 2001, 12, 14, 21, 59, 43, 0, "-05:00" ),
+     'date' => Date.new( 2002, 12, 14 )
+   )
+---
+test: Various explicit families
+todo: true
+spec: 2.23
+yaml: |
+  not-date: !!str 2002-04-28
+  picture: !binary |
+   R0lGODlhDAAMAIQAAP//9/X
+   17unp5WZmZgAAAOfn515eXv
+   Pz7Y6OjuDg4J+fn5OTk6enp
+   56enmleECcgggoBADs=
+
+  application specific tag: !!something |
+   The semantics of the tag
+   above may be different for
+   different documents.
+
+ruby-setup: |
+  YAML.add_private_type( "something" ) do |type, val|
+    "SOMETHING: #{val}"
+  end
+ruby: |
+  {
+    'not-date' => '2002-04-28',
+    'picture' => "GIF89a\f\000\f\000\204\000\000\377\377\367\365\365\356\351\351\345fff\000\000\000\347\347\347^^^\363\363\355\216\216\216\340\340\340\237\237\237\223\223\223\247\247\247\236\236\236i^\020' \202\n\001\000;",
+    'application specific tag' => "SOMETHING: The semantics of the tag\nabove may be different for\ndifferent documents.\n"
+  }
+---
+test: Application specific family
+todo: true
+spec: 2.24
+yaml: |
+  # Establish a tag prefix
+  --- !clarkevans.com,2002/graph/^shape
+    # Use the prefix: shorthand for
+    # !clarkevans.com,2002/graph/circle
+  - !^circle
+    center: &ORIGIN {x: 73, 'y': 129}
+    radius: 7
+  - !^line # !clarkevans.com,2002/graph/line
+    start: *ORIGIN
+    finish: { x: 89, 'y': 102 }
+  - !^label
+    start: *ORIGIN
+    color: 0xFFEEBB
+    value: Pretty vector drawing.
+ruby-setup: |
+  YAML.add_domain_type( "clarkevans.com,2002", 'graph/shape' ) { |type, val|
+    if Array === val
+      val << "Shape Container"
+      val
+    else
+      raise YAML::Error, "Invalid graph of class #{ val.class }: " + val.inspect
+    end
+  }
+  one_shape_proc = Proc.new { |type, val|
+    scheme, domain, type = type.split( /:/, 3 )
+    if val.is_a? ::Hash
+      val['TYPE'] = "Shape: #{type}"
+      val
+    else
+      raise YAML::Error, "Invalid graph of class #{ val.class }: " + val.inspect
+    end
+  }
+  YAML.add_domain_type( "clarkevans.com,2002", 'graph/circle', &one_shape_proc )
+  YAML.add_domain_type( "clarkevans.com,2002", 'graph/line', &one_shape_proc )
+  YAML.add_domain_type( "clarkevans.com,2002", 'graph/label', &one_shape_proc )
+ruby: |
+  [
+    {
+      "radius" => 7,
+      "center"=>
+      {
+        "x" => 73,
+        "y" => 129
+      },
+      "TYPE" => "Shape: graph/circle"
+    }, {
+      "finish" =>
+      {
+        "x" => 89,
+        "y" => 102
+      },
+      "TYPE" => "Shape: graph/line",
+      "start" =>
+      {
+        "x" => 73,
+        "y" => 129
+      }
+    }, {
+      "TYPE" => "Shape: graph/label",
+      "value" => "Pretty vector drawing.",
+      "start" =>
+      {
+        "x" => 73,
+        "y" => 129
+      },
+      "color" => 16772795
+    },
+    "Shape Container"
+  ]
+# ---
+# test: Unordered set
+# spec: 2.25
+# yaml: |
+#   # sets are represented as a
+#   # mapping where each key is
+#   # associated with the empty string
+#   --- !set
+#   ? Mark McGwire
+#   ? Sammy Sosa
+#   ? Ken Griff
+---
+test: Ordered mappings
+todo: true
+spec: 2.26
+yaml: |
+  # ordered maps are represented as
+  # a sequence of mappings, with
+  # each mapping having one key
+  --- !omap
+  - Mark McGwire: 65
+  - Sammy Sosa: 63
+  - Ken Griffy: 58
+ruby: |
+  YAML::Omap[
+    'Mark McGwire', 65,
+    'Sammy Sosa', 63,
+    'Ken Griffy', 58
+  ]
+---
+test: Invoice
+dump_skip: true
+spec: 2.27
+yaml: |
+  --- !clarkevans.com,2002/^invoice
+  invoice: 34843
+  date   : 2001-01-23
+  bill-to: &id001
+      given  : Chris
+      family : Dumars
+      address:
+          lines: |
+              458 Walkman Dr.
+              Suite #292
+          city    : Royal Oak
+          state   : MI
+          postal  : 48046
+  ship-to: *id001
+  product:
+      -
+        sku         : BL394D
+        quantity    : 4
+        description : Basketball
+        price       : 450.00
+      -
+        sku         : BL4438H
+        quantity    : 1
+        description : Super Hoop
+        price       : 2392.00
+  tax  : 251.42
+  total: 4443.52
+  comments: >
+    Late afternoon is best.
+    Backup contact is Nancy
+    Billsmer @ 338-4338.
+php: |
+  array(
+     'invoice' => 34843, 'date' => gmmktime(0, 0, 0, 1, 23, 2001),
+     'bill-to' =>
+      array( 'given' => 'Chris', 'family' => 'Dumars', 'address' => array( 'lines' => "458 Walkman Dr.\nSuite #292\n", 'city' => 'Royal Oak', 'state' => 'MI', 'postal' => 48046 ) )
+     , 'ship-to' =>
+      array( 'given' => 'Chris', 'family' => 'Dumars', 'address' => array( 'lines' => "458 Walkman Dr.\nSuite #292\n", 'city' => 'Royal Oak', 'state' => 'MI', 'postal' => 48046 ) )
+     , 'product' =>
+       array(
+        array( 'sku' => 'BL394D', 'quantity' => 4, 'description' => 'Basketball', 'price' => 450.00 ),
+        array( 'sku' => 'BL4438H', 'quantity' => 1, 'description' => 'Super Hoop', 'price' => 2392.00 )
+      ),
+     'tax' => 251.42, 'total' => 4443.52,
+     'comments' => "Late afternoon is best. Backup contact is Nancy Billsmer @ 338-4338.\n"
+  )
+---
+test: Log file
+todo: true
+spec: 2.28
+yaml: |
+  ---
+  Time: 2001-11-23 15:01:42 -05:00
+  User: ed
+  Warning: >
+    This is an error message
+    for the log file
+  ---
+  Time: 2001-11-23 15:02:31 -05:00
+  User: ed
+  Warning: >
+    A slightly different error
+    message.
+  ---
+  Date: 2001-11-23 15:03:17 -05:00
+  User: ed
+  Fatal: >
+    Unknown variable "bar"
+  Stack:
+    - file: TopClass.py
+      line: 23
+      code: |
+        x = MoreObject("345\n")
+    - file: MoreClass.py
+      line: 58
+      code: |-
+        foo = bar
+ruby: |
+  y = YAML::Stream.new
+  y.add( { 'Time' => YAML::mktime( 2001, 11, 23, 15, 01, 42, 00, "-05:00" ),
+           'User' => 'ed', 'Warning' => "This is an error message for the log file\n" } )
+  y.add( { 'Time' => YAML::mktime( 2001, 11, 23, 15, 02, 31, 00, "-05:00" ),
+           'User' => 'ed', 'Warning' => "A slightly different error message.\n" } )
+  y.add( { 'Date' => YAML::mktime( 2001, 11, 23, 15, 03, 17, 00, "-05:00" ),
+           'User' => 'ed', 'Fatal' => "Unknown variable \"bar\"\n",
+           'Stack' => [
+           { 'file' => 'TopClass.py', 'line' => 23, 'code' => "x = MoreObject(\"345\\n\")\n" },
+           { 'file' => 'MoreClass.py', 'line' => 58, 'code' => "foo = bar" } ] } )
+documents: 3
+
+---
+test: Throwaway comments
+yaml: |
+   ### These are four throwaway comment  ###
+
+   ### lines (the second line is empty). ###
+   this: |   # Comments may trail lines.
+      contains three lines of text.
+      The third one starts with a
+      # character. This isn't a comment.
+
+   # These are three throwaway comment
+   # lines (the first line is empty).
+php: |
+   array(
+     'this' => "contains three lines of text.\nThe third one starts with a\n# character. This isn't a comment.\n"
+   )
+---
+test: Document with a single value
+todo: true
+yaml: |
+   --- >
+   This YAML stream contains a single text value.
+   The next stream is a log file - a sequence of
+   log entries. Adding an entry to the log is a
+   simple matter of appending it at the end.
+ruby: |
+   "This YAML stream contains a single text value. The next stream is a log file - a sequence of log entries. Adding an entry to the log is a simple matter of appending it at the end.\n"
+---
+test: Document stream
+todo: true
+yaml: |
+   ---
+   at: 2001-08-12 09:25:00.00 Z
+   type: GET
+   HTTP: '1.0'
+   url: '/index.html'
+   ---
+   at: 2001-08-12 09:25:10.00 Z
+   type: GET
+   HTTP: '1.0'
+   url: '/toc.html'
+ruby: |
+   y = YAML::Stream.new
+   y.add( {
+      'at' => Time::utc( 2001, 8, 12, 9, 25, 00 ),
+      'type' => 'GET',
+      'HTTP' => '1.0',
+      'url' => '/index.html'
+   } )
+   y.add( {
+      'at' => Time::utc( 2001, 8, 12, 9, 25, 10 ),
+      'type' => 'GET',
+      'HTTP' => '1.0',
+      'url' => '/toc.html'
+   } )
+documents: 2
+
+---
+test: Top level mapping
+yaml: |
+   # This stream is an example of a top-level mapping.
+   invoice : 34843
+   date    : 2001-01-23
+   total   : 4443.52
+php: |
+   array(
+      'invoice' => 34843,
+      'date' => gmmktime(0, 0, 0, 1, 23, 2001),
+      'total' => 4443.52
+   )
+---
+test: Single-line documents
+todo: true
+yaml: |
+  # The following is a sequence of three documents.
+  # The first contains an empty mapping, the second
+  # an empty sequence, and the last an empty string.
+  --- {}
+  --- [ ]
+  --- ''
+ruby: |
+  y = YAML::Stream.new
+  y.add( {} )
+  y.add( [] )
+  y.add( '' )
+documents: 3
+
+---
+test: Document with pause
+todo: true
+yaml: |
+  # A communication channel based on a YAML stream.
+  ---
+  sent at: 2002-06-06 11:46:25.10 Z
+  payload: Whatever
+  # Receiver can process this as soon as the following is sent:
+  ...
+  # Even if the next message is sent long after:
+  ---
+  sent at: 2002-06-06 12:05:53.47 Z
+  payload: Whatever
+  ...
+ruby: |
+  y = YAML::Stream.new
+  y.add(
+    { 'sent at' => YAML::mktime( 2002, 6, 6, 11, 46, 25, 0.10 ),
+      'payload' => 'Whatever' }
+  )
+  y.add(
+    { "payload" => "Whatever", "sent at" => YAML::mktime( 2002, 6, 6, 12, 5, 53, 0.47 ) }
+  )
+documents: 2
+
+---
+test: Explicit typing
+yaml: |
+   integer: 12
+   no int: ! 12
+   string: !!str 12
+php: |
+   array( 'integer' => 12, 'no int' => '12', 'string' => '12' )
+---
+test: Private types
+todo: true
+yaml: |
+  # Both examples below make use of the 'x-private:ball'
+  # type family URI, but with different semantics.
+  ---
+  pool: !!ball
+    number: 8
+    color: black
+  ---
+  bearing: !!ball
+    material: steel
+ruby: |
+  y = YAML::Stream.new
+  y.add( { 'pool' =>
+    YAML::PrivateType.new( 'ball',
+      { 'number' => 8, 'color' => 'black' } ) }
+  )
+  y.add( { 'bearing' =>
+    YAML::PrivateType.new( 'ball',
+      { 'material' => 'steel' } ) }
+  )
+documents: 2
+
+---
+test: Type family under yaml.org
+yaml: |
+  # The URI is 'tag:yaml.org,2002:str'
+  - !!str a Unicode string
+php: |
+  array( 'a Unicode string' )
+---
+test: Type family under perl.yaml.org
+todo: true
+yaml: |
+  # The URI is 'tag:perl.yaml.org,2002:Text::Tabs'
+  - !perl/Text::Tabs {}
+ruby: |
+  [ YAML::DomainType.new( 'perl.yaml.org,2002', 'Text::Tabs', {} ) ]
+---
+test: Type family under clarkevans.com
+todo: true
+yaml: |
+  # The URI is 'tag:clarkevans.com,2003-02:timesheet'
+  - !clarkevans.com,2003-02/timesheet {}
+ruby: |
+  [ YAML::DomainType.new( 'clarkevans.com,2003-02', 'timesheet', {} ) ]
+---
+test: URI Escaping
+todo: true
+yaml: |
+  same:
+    - !domain.tld,2002/type\x30 value
+    - !domain.tld,2002/type0 value
+  different: # As far as the YAML parser is concerned
+    - !domain.tld,2002/type%30 value
+    - !domain.tld,2002/type0 value
+ruby-setup: |
+  YAML.add_domain_type( "domain.tld,2002", "type0" ) { |type, val|
+    "ONE: #{val}"
+  }
+  YAML.add_domain_type( "domain.tld,2002", "type%30" ) { |type, val|
+    "TWO: #{val}"
+  }
+ruby: |
+  { 'same' => [ 'ONE: value', 'ONE: value' ], 'different' => [ 'TWO: value', 'ONE: value' ] }
+---
+test: URI Prefixing
+todo: true
+yaml: |
+  # 'tag:domain.tld,2002:invoice' is some type family.
+  invoice: !domain.tld,2002/^invoice
+    # 'seq' is shorthand for 'tag:yaml.org,2002:seq'.
+    # This does not effect '^customer' below
+    # because it is does not specify a prefix.
+    customers: !seq
+      # '^customer' is shorthand for the full
+      # notation 'tag:domain.tld,2002:customer'.
+      - !^customer
+        given : Chris
+        family : Dumars
+ruby-setup: |
+  YAML.add_domain_type( "domain.tld,2002", /(invoice|customer)/ ) { |type, val|
+    if val.is_a? ::Hash
+      scheme, domain, type = type.split( /:/, 3 )
+      val['type'] = "domain #{type}"
+      val
+    else
+      raise YAML::Error, "Not a Hash in domain.tld/invoice: " + val.inspect
+    end
+  }
+ruby: |
+  { "invoice"=> { "customers"=> [ { "given"=>"Chris", "type"=>"domain customer", "family"=>"Dumars" } ], "type"=>"domain invoice" } }
+
+---
+test: Overriding anchors
+yaml: |
+  anchor : &A001 This scalar has an anchor.
+  override : &A001 >
+   The alias node below is a
+   repeated use of this value.
+  alias : *A001
+php: |
+  array( 'anchor' => 'This scalar has an anchor.',
+    'override' => "The alias node below is a repeated use of this value.\n",
+    'alias' => "The alias node below is a repeated use of this value.\n" )
+---
+test: Flow and block formatting
+todo: true
+yaml: |
+  empty: []
+  flow: [ one, two, three # May span lines,
+           , four,           # indentation is
+             five ]          # mostly ignored.
+  block:
+   - First item in top sequence
+   -
+    - Subordinate sequence entry
+   - >
+     A folded sequence entry
+   - Sixth item in top sequence
+ruby: |
+  { 'empty' => [], 'flow' => [ 'one', 'two', 'three', 'four', 'five' ],
+    'block' => [ 'First item in top sequence', [ 'Subordinate sequence entry' ],
+    "A folded sequence entry\n", 'Sixth item in top sequence' ] }
+---
+test: Complete mapping test
+todo: true
+yaml: |
+ empty: {}
+ flow: { one: 1, two: 2 }
+ spanning: { one: 1,
+    two: 2 }
+ block:
+  first : First entry
+  second:
+   key: Subordinate mapping
+  third:
+   - Subordinate sequence
+   - { }
+   - Previous mapping is empty.
+   - A key: value pair in a sequence.
+     A second: key:value pair.
+   - The previous entry is equal to the following one.
+   -
+     A key: value pair in a sequence.
+     A second: key:value pair.
+  !float 12 : This key is a float.
+  ? >
+   ?
+  : This key had to be protected.
+  "\a" : This key had to be escaped.
+  ? >
+   This is a
+   multi-line
+   folded key
+  : Whose value is
+    also multi-line.
+  ? this also works as a key
+  : with a value at the next line.
+  ?
+   - This key
+   - is a sequence
+  :
+   - With a sequence value.
+  ?
+   This: key
+   is a: mapping
+  :
+   with a: mapping value.
+ruby: |
+  { 'empty' => {}, 'flow' => { 'one' => 1, 'two' => 2 },
+    'spanning' => { 'one' => 1, 'two' => 2 },
+    'block' => { 'first' => 'First entry', 'second' =>
+    { 'key' => 'Subordinate mapping' }, 'third' =>
+      [ 'Subordinate sequence', {}, 'Previous mapping is empty.',
+        { 'A key' => 'value pair in a sequence.', 'A second' => 'key:value pair.' },
+        'The previous entry is equal to the following one.',
+        { 'A key' => 'value pair in a sequence.', 'A second' => 'key:value pair.' } ],
+    12.0 => 'This key is a float.', "?\n" => 'This key had to be protected.',
+    "\a" => 'This key had to be escaped.',
+    "This is a multi-line folded key\n" => "Whose value is also multi-line.",
+    'this also works as a key' => 'with a value at the next line.',
+    [ 'This key', 'is a sequence' ] => [ 'With a sequence value.' ] } }
+  # Couldn't recreate map exactly, so we'll do a detailed check to be sure it's entact
+  obj_y['block'].keys.each { |k|
+    if Hash === k
+      v = obj_y['block'][k]
+      if k['This'] == 'key' and k['is a'] == 'mapping' and v['with a'] == 'mapping value.'
+         obj_r['block'][k] = v
+      end
+    end
+  }
+---
+test: Literal explicit indentation
+yaml: |
+   # Explicit indentation must
+   # be given in all the three
+   # following cases.
+   leading spaces: |2
+         This value starts with four spaces.
+
+   leading line break: |2
+
+     This value starts with a line break.
+
+   leading comment indicator: |2
+     # first line starts with a
+     # character.
+
+   # Explicit indentation may
+   # also be given when it is
+   # not required.
+   redundant: |2
+     This value is indented 2 spaces.
+php: |
+   array(
+      'leading spaces' => "    This value starts with four spaces.\n",
+      'leading line break' => "\nThis value starts with a line break.\n",
+      'leading comment indicator' => "# first line starts with a\n# character.\n",
+      'redundant' => "This value is indented 2 spaces.\n"
+   )
+---
+test: Chomping and keep modifiers
+yaml: |
+    clipped: |
+        This has one newline.
+
+    same as "clipped" above: "This has one newline.\n"
+
+    stripped: |-
+        This has no newline.
+
+    same as "stripped" above: "This has no newline."
+
+    kept: |+
+        This has two newlines.
+
+    same as "kept" above: "This has two newlines.\n\n"
+php: |
+    array(
+      'clipped' => "This has one newline.\n",
+      'same as "clipped" above' => "This has one newline.\n",
+      'stripped' => 'This has no newline.',
+      'same as "stripped" above' => 'This has no newline.',
+      'kept' => "This has two newlines.\n\n",
+      'same as "kept" above' => "This has two newlines.\n\n"
+    )
+---
+test: Literal combinations
+todo: true
+yaml: |
+   empty: |
+
+   literal: |
+    The \ ' " characters may be
+    freely used. Leading white
+       space is significant.
+
+    Line breaks are significant.
+    Thus this value contains one
+    empty line and ends with a
+    single line break, but does
+    not start with one.
+
+   is equal to: "The \\ ' \" characters may \
+    be\nfreely used. Leading white\n   space \
+    is significant.\n\nLine breaks are \
+    significant.\nThus this value contains \
+    one\nempty line and ends with a\nsingle \
+    line break, but does\nnot start with one.\n"
+
+   # Comments may follow a block
+   # scalar value. They must be
+   # less indented.
+
+   # Modifiers may be combined in any order.
+   indented and chomped: |2-
+       This has no newline.
+
+   also written as: |-2
+       This has no newline.
+
+   both are equal to: "  This has no newline."
+php: |
+   array(
+     'empty' => '',
+     'literal' => "The \\ ' \" characters may be\nfreely used. Leading white\n   space " +
+       "is significant.\n\nLine breaks are significant.\nThus this value contains one\n" +
+       "empty line and ends with a\nsingle line break, but does\nnot start with one.\n",
+     'is equal to' => "The \\ ' \" characters may be\nfreely used. Leading white\n   space " +
+       "is significant.\n\nLine breaks are significant.\nThus this value contains one\n" +
+       "empty line and ends with a\nsingle line break, but does\nnot start with one.\n",
+     'indented and chomped' => '  This has no newline.',
+     'also written as' => '  This has no newline.',
+     'both are equal to' => '  This has no newline.'
+   )
+---
+test: Folded combinations
+todo: true
+yaml: |
+   empty: >
+
+   one paragraph: >
+    Line feeds are converted
+    to spaces, so this value
+    contains no line breaks
+    except for the final one.
+
+   multiple paragraphs: >2
+
+     An empty line, either
+     at the start or in
+     the value:
+
+     Is interpreted as a
+     line break. Thus this
+     value contains three
+     line breaks.
+
+   indented text: >
+       This is a folded
+       paragraph followed
+       by a list:
+        * first entry
+        * second entry
+       Followed by another
+       folded paragraph,
+       another list:
+
+        * first entry
+
+        * second entry
+
+       And a final folded
+       paragraph.
+
+   above is equal to: |
+       This is a folded paragraph followed by a list:
+        * first entry
+        * second entry
+       Followed by another folded paragraph, another list:
+
+        * first entry
+
+        * second entry
+
+       And a final folded paragraph.
+
+   # Explicit comments may follow
+   # but must be less indented.
+php: |
+   array(
+     'empty' => '',
+     'one paragraph' => 'Line feeds are converted to spaces, so this value'.
+       " contains no line breaks except for the final one.\n",
+     'multiple paragraphs' => "\nAn empty line, either at the start or in the value:\n".
+       "Is interpreted as a line break. Thus this value contains three line breaks.\n",
+     'indented text' => "This is a folded paragraph followed by a list:\n".
+       " * first entry\n * second entry\nFollowed by another folded paragraph, ".
+       "another list:\n\n * first entry\n\n * second entry\n\nAnd a final folded paragraph.\n",
+     'above is equal to' => "This is a folded paragraph followed by a list:\n".
+       " * first entry\n * second entry\nFollowed by another folded paragraph, ".
+       "another list:\n\n * first entry\n\n * second entry\n\nAnd a final folded paragraph.\n"
+   )
+---
+test: Single quotes
+todo: true
+yaml: |
+   empty: ''
+   second: '! : \ etc. can be used freely.'
+   third: 'a single quote '' must be escaped.'
+   span: 'this contains
+         six spaces
+
+         and one
+         line break'
+   is same as: "this contains six spaces\nand one line break"
+php: |
+   array(
+     'empty' => '',
+     'second' => '! : \\ etc. can be used freely.',
+     'third' => "a single quote ' must be escaped.",
+     'span' => "this contains six spaces\nand one line break",
+     'is same as' => "this contains six spaces\nand one line break"
+   )
+---
+test: Double quotes
+todo: true
+yaml: |
+   empty: ""
+   second: "! : etc. can be used freely."
+   third: "a \" or a \\ must be escaped."
+   fourth: "this value ends with an LF.\n"
+   span: "this contains
+     four  \
+         spaces"
+   is equal to: "this contains four  spaces"
+php: |
+   array(
+     'empty' => '',
+     'second' => '! : etc. can be used freely.',
+     'third' => 'a " or a \\ must be escaped.',
+     'fourth' => "this value ends with an LF.\n",
+     'span' => "this contains four  spaces",
+     'is equal to' => "this contains four  spaces"
+   )
+---
+test: Unquoted strings
+todo: true
+yaml: |
+   first: There is no unquoted empty string.
+
+   second: 12          ## This is an integer.
+
+   third: !!str 12      ## This is a string.
+
+   span: this contains
+         six spaces
+
+         and one
+         line break
+
+   indicators: this has no comments.
+               #:foo and bar# are
+               both text.
+
+   flow: [ can span
+              lines, # comment
+              like
+              this ]
+
+   note: { one-line keys: but multi-line values }
+
+php: |
+   array(
+     'first' => 'There is no unquoted empty string.',
+     'second' => 12,
+     'third' => '12',
+     'span' => "this contains six spaces\nand one line break",
+     'indicators' => "this has no comments. #:foo and bar# are both text.",
+     'flow' => [ 'can span lines', 'like this' ],
+     'note' => { 'one-line keys' => 'but multi-line values' }
+   )
+---
+test: Spanning sequences
+todo: true
+yaml: |
+   # The following are equal seqs
+   # with different identities.
+   flow: [ one, two ]
+   spanning: [ one,
+        two ]
+   block:
+     - one
+     - two
+php: |
+   array(
+     'flow' => [ 'one', 'two' ],
+     'spanning' => [ 'one', 'two' ],
+     'block' => [ 'one', 'two' ]
+   )
+---
+test: Flow mappings
+yaml: |
+   # The following are equal maps
+   # with different identities.
+   flow: { one: 1, two: 2 }
+   block:
+       one: 1
+       two: 2
+php: |
+   array(
+     'flow' => array( 'one' => 1, 'two' => 2 ),
+     'block' => array( 'one' => 1, 'two' => 2 )
+   )
+---
+test: Representations of 12
+todo: true
+yaml: |
+   - 12 # An integer
+   # The following scalars
+   # are loaded to the
+   # string value '1' '2'.
+   - !!str 12
+   - '12'
+   - "12"
+   - "\
+     1\
+     2\
+     "
+   # Strings containing paths and regexps can be unquoted:
+   - /foo/bar
+   - d:/foo/bar
+   - foo/bar
+   - /a.*b/
+php: |
+   array( 12, '12', '12', '12', '12', '/foo/bar', 'd:/foo/bar', 'foo/bar', '/a.*b/' )
+---
+test: "Null"
+todo: true
+yaml: |
+   canonical: ~
+
+   english: null
+
+   # This sequence has five
+   # entries, two with values.
+   sparse:
+     - ~
+     - 2nd entry
+     - Null
+     - 4th entry
+     -
+
+   four: This mapping has five keys,
+         only two with values.
+
+php: |
+   array (
+     'canonical' => null,
+     'english' => null,
+     'sparse' => array( null, '2nd entry', null, '4th entry', null ]),
+     'four' => 'This mapping has five keys, only two with values.'
+   )
+---
+test: Omap
+todo: true
+yaml: |
+   # Explicitly typed dictionary.
+   Bestiary: !omap
+     - aardvark: African pig-like ant eater. Ugly.
+     - anteater: South-American ant eater. Two species.
+     - anaconda: South-American constrictor snake. Scary.
+     # Etc.
+ruby: |
+   {
+     'Bestiary' => YAML::Omap[
+       'aardvark', 'African pig-like ant eater. Ugly.',
+       'anteater', 'South-American ant eater. Two species.',
+       'anaconda', 'South-American constrictor snake. Scary.'
+     ]
+   }
+
+---
+test: Pairs
+todo: true
+yaml: |
+  # Explicitly typed pairs.
+  tasks: !pairs
+    - meeting: with team.
+    - meeting: with boss.
+    - break: lunch.
+    - meeting: with client.
+ruby: |
+  {
+    'tasks' => YAML::Pairs[
+      'meeting', 'with team.',
+      'meeting', 'with boss.',
+      'break', 'lunch.',
+      'meeting', 'with client.'
+    ]
+  }
+
+---
+test: Set
+todo: true
+yaml: |
+  # Explicitly typed set.
+  baseball players: !set
+    Mark McGwire:
+    Sammy Sosa:
+    Ken Griffey:
+ruby: |
+  {
+    'baseball players' => YAML::Set[
+      'Mark McGwire', nil,
+      'Sammy Sosa', nil,
+      'Ken Griffey', nil
+    ]
+  }
+
+---
+test: Integer
+yaml: |
+   canonical: 12345
+   octal: 014
+   hexadecimal: 0xC
+php: |
+   array(
+     'canonical' => 12345,
+     'octal' => 12,
+     'hexadecimal' => 12
+   )
+---
+test: Float
+yaml: |
+   canonical: 1.23015e+3
+   exponential: 12.3015e+02
+   negative infinity: -.inf
+   not a number: .NaN
+php: |
+  array(
+    'canonical' => 1230.15,
+    'exponential' => 1230.15,
+    'negative infinity' => log(0),
+    'not a number' => -log(0)
+  )
+---
+test: Timestamp
+todo: true
+yaml: |
+   canonical:       2001-12-15T02:59:43.1Z
+   valid iso8601:   2001-12-14t21:59:43.10-05:00
+   space separated: 2001-12-14 21:59:43.10 -05:00
+   date (noon UTC): 2002-12-14
+ruby: |
+   array(
+     'canonical' => YAML::mktime( 2001, 12, 15, 2, 59, 43, 0.10 ),
+     'valid iso8601' => YAML::mktime( 2001, 12, 14, 21, 59, 43, 0.10, "-05:00" ),
+     'space separated' => YAML::mktime( 2001, 12, 14, 21, 59, 43, 0.10, "-05:00" ),
+     'date (noon UTC)' => Date.new( 2002, 12, 14 )
+   )
+---
+test: Binary
+todo: true
+yaml: |
+   canonical: !binary "\
+    R0lGODlhDAAMAIQAAP//9/X17unp5WZmZgAAAOfn515eXvPz7Y6OjuDg4J+fn5\
+    OTk6enp56enmlpaWNjY6Ojo4SEhP/++f/++f/++f/++f/++f/++f/++f/++f/+\
+    +f/++f/++f/++f/++f/++SH+Dk1hZGUgd2l0aCBHSU1QACwAAAAADAAMAAAFLC\
+    AgjoEwnuNAFOhpEMTRiggcz4BNJHrv/zCFcLiwMWYNG84BwwEeECcgggoBADs="
+   base64: !binary |
+    R0lGODlhDAAMAIQAAP//9/X17unp5WZmZgAAAOfn515eXvPz7Y6OjuDg4J+fn5
+    OTk6enp56enmlpaWNjY6Ojo4SEhP/++f/++f/++f/++f/++f/++f/++f/++f/+
+    +f/++f/++f/++f/++f/++SH+Dk1hZGUgd2l0aCBHSU1QACwAAAAADAAMAAAFLC
+    AgjoEwnuNAFOhpEMTRiggcz4BNJHrv/zCFcLiwMWYNG84BwwEeECcgggoBADs=
+   description: >
+    The binary value above is a tiny arrow
+    encoded as a gif image.
+ruby-setup: |
+   arrow_gif = "GIF89a\f\000\f\000\204\000\000\377\377\367\365\365\356\351\351\345fff\000\000\000\347\347\347^^^\363\363\355\216\216\216\340\340\340\237\237\237\223\223\223\247\247\247\236\236\236iiiccc\243\243\243\204\204\204\377\376\371\377\376\371\377\376\371\377\376\371\377\376\371\377\376\371\377\376\371\377\376\371\377\376\371\377\376\371\377\376\371\377\376\371\377\376\371\377\376\371!\376\016Made with GIMP\000,\000\000\000\000\f\000\f\000\000\005,  \216\2010\236\343@\024\350i\020\304\321\212\010\034\317\200M$z\357\3770\205p\270\2601f\r\e\316\001\303\001\036\020' \202\n\001\000;"
+ruby: |
+   {
+     'canonical' => arrow_gif,
+     'base64' => arrow_gif,
+     'description' => "The binary value above is a tiny arrow encoded as a gif image.\n"
+   }
+
+---
+test: Merge key
+todo: true
+yaml: |
+  ---
+  - &CENTER { x: 1, y: 2 }
+  - &LEFT { x: 0, y: 2 }
+  - &BIG { r: 10 }
+  - &SMALL { r: 1 }
+
+  # All the following maps are equal:
+
+  - # Explicit keys
+    x: 1
+    y: 2
+    r: 10
+    label: center/big
+
+  - # Merge one map
+    << : *CENTER
+    r: 10
+    label: center/big
+
+  - # Merge multiple maps
+    << : [ *CENTER, *BIG ]
+    label: center/big
+
+  - # Override
+    << : [ *BIG, *LEFT, *SMALL ]
+    x: 1
+    label: center/big
+
+ruby-setup: |
+  center = { 'x' => 1, 'y' => 2 }
+  left = { 'x' => 0, 'y' => 2 }
+  big = { 'r' => 10 }
+  small = { 'r' => 1 }
+  node1 = { 'x' => 1, 'y' => 2, 'r' => 10, 'label' => 'center/big' }
+  node2 = center.dup
+  node2.update( { 'r' => 10, 'label' => 'center/big' } )
+  node3 = big.dup
+  node3.update( center )
+  node3.update( { 'label' => 'center/big' } )
+  node4 = small.dup
+  node4.update( left )
+  node4.update( big )
+  node4.update( { 'x' => 1, 'label' => 'center/big' } )
+
+ruby: |
+  [
+    center, left, big, small, node1, node2, node3, node4
+  ]
+
+---
+test: Default key
+todo: true
+yaml: |
+   ---     # Old schema
+   link with:
+     - library1.dll
+     - library2.dll
+   ---     # New schema
+   link with:
+     - = : library1.dll
+       version: 1.2
+     - = : library2.dll
+       version: 2.3
+ruby: |
+   y = YAML::Stream.new
+   y.add( { 'link with' => [ 'library1.dll', 'library2.dll' ] } )
+   obj_h = Hash[ 'version' => 1.2 ]
+   obj_h.default = 'library1.dll'
+   obj_h2 = Hash[ 'version' => 2.3 ]
+   obj_h2.default = 'library2.dll'
+   y.add( { 'link with' => [ obj_h, obj_h2 ] } )
+documents: 2
+
+---
+test: Special keys
+todo: true
+yaml: |
+   "!": These three keys
+   "&": had to be quoted
+   "=": and are normal strings.
+   # NOTE: the following node should NOT be serialized this way.
+   encoded node :
+    !special '!' : '!type'
+    !special|canonical '&' : 12
+    = : value
+   # The proper way to serialize the above node is as follows:
+   node : !!type &12 value
+ruby: |
+   { '!' => 'These three keys', '&' => 'had to be quoted',
+     '=' => 'and are normal strings.',
+     'encoded node' => YAML::PrivateType.new( 'type', 'value' ),
+     'node' => YAML::PrivateType.new( 'type', 'value' ) }
diff --git a/vendor/symfony/yaml/Tests/Fixtures/YtsTypeTransfers.yml b/vendor/symfony/yaml/Tests/Fixtures/YtsTypeTransfers.yml
new file mode 100644
index 0000000..f1a7832
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/Fixtures/YtsTypeTransfers.yml
@@ -0,0 +1,224 @@
+--- %YAML:1.0
+test: Strings
+brief: >
+    Any group of characters beginning with an
+    alphabetic or numeric character is a string,
+    unless it belongs to one of the groups below
+    (such as an Integer or Time).
+yaml: |
+    String
+php: |
+    'String'
+---
+test: String characters
+brief: >
+    A string can contain any alphabetic or
+    numeric character, along with many
+    punctuation characters, including the
+    period, dash, space, quotes, exclamation, and
+    question mark.
+yaml: |
+    - What's Yaml?
+    - It's for writing data structures in plain text.
+    - And?
+    - And what? That's not good enough for you?
+    - No, I mean, "And what about Yaml?"
+    - Oh, oh yeah. Uh.. Yaml for Ruby.
+php: |
+    array(
+      "What's Yaml?",
+      "It's for writing data structures in plain text.",
+      "And?",
+      "And what? That's not good enough for you?",
+      "No, I mean, \"And what about Yaml?\"",
+      "Oh, oh yeah. Uh.. Yaml for Ruby."
+    )
+---
+test: Indicators in Strings
+brief: >
+    Be careful using indicators in strings.  In particular,
+    the comma, colon, and pound sign must be used carefully.
+yaml: |
+    the colon followed by space is an indicator: but is a string:right here
+    same for the pound sign: here we have it#in a string
+    the comma can, honestly, be used in most cases: [ but not in, inline collections ]
+php: |
+    array(
+      'the colon followed by space is an indicator' => 'but is a string:right here',
+      'same for the pound sign' => 'here we have it#in a string',
+      'the comma can, honestly, be used in most cases' => array('but not in', 'inline collections')
+    )
+---
+test: Forcing Strings
+brief: >
+    Any YAML type can be forced into a string using the
+    explicit !!str method.
+yaml: |
+    date string: !!str 2001-08-01
+    number string: !!str 192
+php: |
+    array(
+      'date string' => '2001-08-01',
+      'number string' => '192'
+    )
+---
+test: Single-quoted Strings
+brief: >
+    You can also enclose your strings within single quotes,
+    which allows use of slashes, colons, and other indicators
+    freely.  Inside single quotes, you can represent a single
+    quote in your string by using two single quotes next to
+    each other.
+yaml: |
+    all my favorite symbols: '#:!/%.)'
+    a few i hate: '&(*'
+    why do i hate them?: 'it''s very hard to explain'
+    entities: '&pound; me'
+php: |
+    array(
+      'all my favorite symbols' => '#:!/%.)',
+      'a few i hate' => '&(*',
+      'why do i hate them?' => 'it\'s very hard to explain',
+      'entities' => '&pound; me'
+    )
+---
+test: Double-quoted Strings
+brief: >
+    Enclosing strings in double quotes allows you
+    to use escapings to represent ASCII and
+    Unicode characters.
+yaml: |
+    i know where i want my line breaks: "one here\nand another here\n"
+php: |
+    array(
+      'i know where i want my line breaks' => "one here\nand another here\n"
+    )
+---
+test: Multi-line Quoted Strings
+todo: true
+brief: >
+    Both single- and double-quoted strings may be
+    carried on to new lines in your YAML document.
+    They must be indented a step and indentation
+    is interpreted as a single space.
+yaml: |
+    i want a long string: "so i'm going to
+      let it go on and on to other lines
+      until i end it with a quote."
+php: |
+    array('i want a long string' => "so i'm going to ".
+         "let it go on and on to other lines ".
+         "until i end it with a quote."
+    )
+
+---
+test: Plain scalars
+todo: true
+brief: >
+    Unquoted strings may also span multiple lines, if they
+    are free of YAML space indicators and indented.
+yaml: |
+    - My little toe is broken in two places;
+    - I'm crazy to have skied this way;
+    - I'm not the craziest he's seen, since there was always the German guy
+      who skied for 3 hours on a broken shin bone (just below the kneecap);
+    - Nevertheless, second place is respectable, and he doesn't
+      recommend going for the record;
+    - He's going to put my foot in plaster for a month;
+    - This would impair my skiing ability somewhat for the
+      duration, as can be imagined.
+php: |
+    array(
+      "My little toe is broken in two places;",
+      "I'm crazy to have skied this way;",
+      "I'm not the craziest he's seen, since there was always ".
+         "the German guy who skied for 3 hours on a broken shin ".
+         "bone (just below the kneecap);",
+      "Nevertheless, second place is respectable, and he doesn't ".
+         "recommend going for the record;",
+      "He's going to put my foot in plaster for a month;",
+      "This would impair my skiing ability somewhat for the duration, ".
+         "as can be imagined."
+    )
+---
+test: 'Null'
+brief: >
+    You can use the tilde '~' character for a null value.
+yaml: |
+    name: Mr. Show
+    hosted by: Bob and David
+    date of next season: ~
+php: |
+    array(
+      'name' => 'Mr. Show',
+      'hosted by' => 'Bob and David',
+      'date of next season' => null
+    )
+---
+test: Boolean
+brief: >
+    You can use 'true' and 'false' for Boolean values.
+yaml: |
+    Is Gus a Liar?: true
+    Do I rely on Gus for Sustenance?: false
+php: |
+    array(
+      'Is Gus a Liar?' => true,
+      'Do I rely on Gus for Sustenance?' => false
+    )
+---
+test: Integers
+dump_skip: true
+brief: >
+    An integer is a series of numbers, optionally
+    starting with a positive or negative sign.  Integers
+    may also contain commas for readability.
+yaml: |
+    zero: 0
+    simple: 12
+php: |
+    array(
+      'zero' => 0,
+      'simple' => 12,
+    )
+---
+test: Floats
+dump_skip: true
+brief: >
+     Floats are represented by numbers with decimals,
+     allowing for scientific notation, as well as
+     positive and negative infinity and "not a number."
+yaml: |
+     a simple float: 2.00
+     scientific notation: 1.00009e+3
+php: |
+     array(
+       'a simple float' => 2.0,
+       'scientific notation' => 1000.09
+     )
+---
+test: Time
+todo: true
+brief: >
+    You can represent timestamps by using
+    ISO8601 format, or a variation which
+    allows spaces between the date, time and
+    time zone.
+yaml: |
+    iso8601: 2001-12-14t21:59:43.10-05:00
+    space separated: 2001-12-14 21:59:43.10 -05:00
+php: |
+    array(
+      'iso8601' => mktime( 2001, 12, 14, 21, 59, 43, 0.10, "-05:00" ),
+      'space separated' => mktime( 2001, 12, 14, 21, 59, 43, 0.10, "-05:00" )
+    )
+---
+test: Date
+todo: true
+brief: >
+    A date can be represented by its year,
+    month and day in ISO8601 order.
+yaml: |
+    1976-07-31
+php: |
+    date( 1976, 7, 31 )
diff --git a/vendor/symfony/yaml/Tests/Fixtures/arrow.gif b/vendor/symfony/yaml/Tests/Fixtures/arrow.gif
new file mode 100644
index 0000000..443aca4
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/Fixtures/arrow.gif
diff --git a/vendor/symfony/yaml/Tests/Fixtures/booleanMappingKeys.yml b/vendor/symfony/yaml/Tests/Fixtures/booleanMappingKeys.yml
new file mode 100644
index 0000000..26799e8
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/Fixtures/booleanMappingKeys.yml
@@ -0,0 +1,11 @@
+--- %YAML:1.0
+test: Miscellaneous
+spec: 2.21
+yaml: |
+  true: true
+  false: false
+php: |
+  array(
+    'true' => true,
+    'false' => false,
+  )
diff --git a/vendor/symfony/yaml/Tests/Fixtures/embededPhp.yml b/vendor/symfony/yaml/Tests/Fixtures/embededPhp.yml
new file mode 100644
index 0000000..ec456ed
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/Fixtures/embededPhp.yml
@@ -0,0 +1 @@
+value: <?php echo 1 + 2 + 3 ?>
diff --git a/vendor/symfony/yaml/Tests/Fixtures/escapedCharacters.yml b/vendor/symfony/yaml/Tests/Fixtures/escapedCharacters.yml
new file mode 100644
index 0000000..cc0356d
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/Fixtures/escapedCharacters.yml
@@ -0,0 +1,155 @@
+test: outside double quotes
+yaml: |
+    \0 \ \a \b \n
+php: |
+    "\\0 \\ \\a \\b \\n"
+---
+test: 'null'
+yaml: |
+    "\0"
+php: |
+    "\x00"
+---
+test: bell
+yaml: |
+    "\a"
+php: |
+    "\x07"
+---
+test: backspace
+yaml: |
+    "\b"
+php: |
+    "\x08"
+---
+test: horizontal tab (1)
+yaml: |
+    "\t"
+php: |
+    "\x09"
+---
+test: horizontal tab (2)
+yaml: |
+    "\	"
+php: |
+    "\x09"
+---
+test: line feed
+yaml: |
+    "\n"
+php: |
+    "\x0a"
+---
+test: vertical tab
+yaml: |
+    "\v"
+php: |
+    "\x0b"
+---
+test: form feed
+yaml: |
+    "\f"
+php: |
+    "\x0c"
+---
+test: carriage return
+yaml: |
+    "\r"
+php: |
+    "\x0d"
+---
+test: escape
+yaml: |
+    "\e"
+php: |
+   "\x1b"
+---
+test: space
+yaml: |
+    "\ "
+php: |
+    "\x20"
+---
+test: slash
+yaml: |
+    "\/"
+php: |
+    "\x2f"
+---
+test: backslash
+yaml: |
+    "\\"
+php: |
+    "\\"
+---
+test: Unicode next line
+yaml: |
+    "\N"
+php: |
+    "\xc2\x85"
+---
+test: Unicode non-breaking space
+yaml: |
+    "\_"
+php: |
+    "\xc2\xa0"
+---
+test: Unicode line separator
+yaml: |
+    "\L"
+php: |
+    "\xe2\x80\xa8"
+---
+test: Unicode paragraph separator
+yaml: |
+    "\P"
+php: |
+    "\xe2\x80\xa9"
+---
+test: Escaped 8-bit Unicode
+yaml: |
+    "\x42"
+php: |
+    "B"
+---
+test: Escaped 16-bit Unicode
+yaml: |
+    "\u20ac"
+php: |
+    "\xe2\x82\xac"
+---
+test: Escaped 32-bit Unicode
+yaml: |
+    "\U00000043"
+php: |
+    "C"
+---
+test: Example 5.13 Escaped Characters
+note: |
+    Currently throws an error parsing first line. Maybe Symfony Yaml doesn't support
+    continuation of string across multiple lines? Keeping test here but disabled.
+todo: true
+yaml: |
+    "Fun with \\
+    \" \a \b \e \f \
+    \n \r \t \v \0 \
+    \  \_ \N \L \P \
+    \x41 \u0041 \U00000041"
+php: |
+    "Fun with \x5C\n\x22 \x07 \x08 \x1B \x0C\n\x0A \x0D \x09 \x0B \x00\n\x20 \xA0 \x85 \xe2\x80\xa8 \xe2\x80\xa9\nA A A"
+---
+test: Double quotes with a line feed
+yaml: |
+   { double: "some value\n \"some quoted string\" and 'some single quotes one'" }
+php: |
+    array(
+        'double' => "some value\n \"some quoted string\" and 'some single quotes one'"
+    )
+---
+test: Backslashes
+yaml: |
+    { single: 'foo\Var', no-quotes: foo\Var, double: "foo\\Var" }
+php: |
+    array(
+        'single' => 'foo\Var', 'no-quotes' => 'foo\Var', 'double' => 'foo\Var'
+    )
diff --git a/vendor/symfony/yaml/Tests/Fixtures/index.yml b/vendor/symfony/yaml/Tests/Fixtures/index.yml
new file mode 100644
index 0000000..3216a89
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/Fixtures/index.yml
@@ -0,0 +1,18 @@
+- escapedCharacters
+- sfComments
+- sfCompact
+- sfTests
+- sfObjects
+- sfMergeKey
+- sfQuotes
+- YtsAnchorAlias
+- YtsBasicTests
+- YtsBlockMapping
+- YtsDocumentSeparator
+- YtsErrorTests
+- YtsFlowCollections
+- YtsFoldedScalars
+- YtsNullsAndEmpties
+- YtsSpecificationExamples
+- YtsTypeTransfers
+- unindentedCollections
diff --git a/vendor/symfony/yaml/Tests/Fixtures/multiple_lines_as_literal_block.yml b/vendor/symfony/yaml/Tests/Fixtures/multiple_lines_as_literal_block.yml
new file mode 100644
index 0000000..9d72f09
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/Fixtures/multiple_lines_as_literal_block.yml
@@ -0,0 +1,14 @@
+data:
+    single_line: 'foo bar baz'
+    multi_line: |
+        foo
+        line with trailing spaces:
+          
+        bar
+        integer like line:
+        123456789
+        empty line:
+        
+        baz
+    multi_line_with_carriage_return: "foo\nbar\r\nbaz"
+    nested_inlined_multi_line_string: { inlined_multi_line: "foo\nbar\r\nempty line:\n\nbaz" }
diff --git a/vendor/symfony/yaml/Tests/Fixtures/multiple_lines_as_literal_block_leading_space_in_first_line.yml b/vendor/symfony/yaml/Tests/Fixtures/multiple_lines_as_literal_block_leading_space_in_first_line.yml
new file mode 100644
index 0000000..3f2dedd
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/Fixtures/multiple_lines_as_literal_block_leading_space_in_first_line.yml
@@ -0,0 +1,4 @@
+data:
+    multi_line: |4
+            the first line has leading spaces
+        The second line does not.
diff --git a/vendor/symfony/yaml/Tests/Fixtures/nonStringKeys.yml b/vendor/symfony/yaml/Tests/Fixtures/nonStringKeys.yml
new file mode 100644
index 0000000..354b079
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/Fixtures/nonStringKeys.yml
@@ -0,0 +1,3 @@
+- booleanMappingKeys
+- numericMappingKeys
+- nullMappingKey
diff --git a/vendor/symfony/yaml/Tests/Fixtures/not_readable.yml b/vendor/symfony/yaml/Tests/Fixtures/not_readable.yml
new file mode 100644
index 0000000..3216a89
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/Fixtures/not_readable.yml
@@ -0,0 +1,18 @@
+- escapedCharacters
+- sfComments
+- sfCompact
+- sfTests
+- sfObjects
+- sfMergeKey
+- sfQuotes
+- YtsAnchorAlias
+- YtsBasicTests
+- YtsBlockMapping
+- YtsDocumentSeparator
+- YtsErrorTests
+- YtsFlowCollections
+- YtsFoldedScalars
+- YtsNullsAndEmpties
+- YtsSpecificationExamples
+- YtsTypeTransfers
+- unindentedCollections
diff --git a/vendor/symfony/yaml/Tests/Fixtures/nullMappingKey.yml b/vendor/symfony/yaml/Tests/Fixtures/nullMappingKey.yml
new file mode 100644
index 0000000..7dcadc7
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/Fixtures/nullMappingKey.yml
@@ -0,0 +1,9 @@
+--- %YAML:1.0
+test: Miscellaneous
+spec: 2.21
+yaml: |
+  null: ~
+php: |
+  array(
+    'null' => null,
+  )
diff --git a/vendor/symfony/yaml/Tests/Fixtures/numericMappingKeys.yml b/vendor/symfony/yaml/Tests/Fixtures/numericMappingKeys.yml
new file mode 100644
index 0000000..9cfb771
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/Fixtures/numericMappingKeys.yml
@@ -0,0 +1,23 @@
+--- %YAML:1.0
+test: A sequence with an unordered array
+brief: >
+  A sequence with an unordered array
+yaml: |
+  1: foo
+  0: bar
+php: |
+  array(1 => 'foo', 0 => 'bar')
+---
+test: Integers as Map Keys
+brief: >
+    An integer can be used as dictionary key.
+yaml: |
+    1: one
+    2: two
+    3: three
+php: |
+    array(
+        1 => 'one',
+        2 => 'two',
+        3 => 'three'
+    )
diff --git a/vendor/symfony/yaml/Tests/Fixtures/sfComments.yml b/vendor/symfony/yaml/Tests/Fixtures/sfComments.yml
new file mode 100644
index 0000000..b72a9b6
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/Fixtures/sfComments.yml
@@ -0,0 +1,76 @@
+--- %YAML:1.0
+test: Comments at the end of a line
+brief: >
+    Comments at the end of a line
+yaml: |
+    ex1: "foo # bar"
+    ex2: "foo # bar" # comment
+    ex3: 'foo # bar' # comment
+    ex4: foo # comment
+    ex5: foo	#	comment with tab before  
+    ex6: foo#foo # comment here
+    ex7: foo 	# ignore me # and me
+php: |
+    array('ex1' => 'foo # bar', 'ex2' => 'foo # bar', 'ex3' => 'foo # bar', 'ex4' => 'foo', 'ex5' => 'foo', 'ex6' => 'foo#foo', 'ex7' => 'foo')
+---
+test: Comments in the middle
+brief: >
+  Comments in the middle
+yaml: |
+    foo:
+    # some comment
+    # some comment
+      bar: foo
+    # some comment
+    # some comment
+php: |
+    array('foo' => array('bar' => 'foo'))
+---
+test: Comments on a hash line
+brief: >
+  Comments on a hash line
+yaml: |
+    foo:   # a comment
+      foo: bar # a comment
+php: |
+    array('foo' => array('foo' => 'bar'))
+---
+test: 'Value starting with a #'
+brief: >
+  'Value starting with a #'
+yaml: |
+    foo:   '#bar'
+php: |
+    array('foo' => '#bar')
+---
+test: Document starting with a comment and a separator
+brief: >
+  Commenting before document start is allowed
+yaml: |
+    # document comment
+    ---
+    foo: bar # a comment
+php: |
+    array('foo' => 'bar')
+---
+test: Comment containing a colon on a hash line
+brief: >
+    Comment containing a colon on a scalar line
+yaml: 'foo # comment: this is also part of the comment'
+php: |
+    'foo'
+---
+test: 'Hash key containing a #'
+brief: >
+    'Hash key containing a #'
+yaml: 'foo#bar: baz'
+php: |
+    array('foo#bar' => 'baz')
+---
+test: 'Hash key ending with a space and a #'
+brief: >
+    'Hash key ending with a space and a #'
+yaml: |
+    'foo #': baz
+php: |
+    array('foo #' => 'baz')
diff --git a/vendor/symfony/yaml/Tests/Fixtures/sfCompact.yml b/vendor/symfony/yaml/Tests/Fixtures/sfCompact.yml
new file mode 100644
index 0000000..1339d23
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/Fixtures/sfCompact.yml
@@ -0,0 +1,159 @@
+--- %YAML:1.0
+test: Compact notation
+brief: |
+    Compact notation for sets of mappings with single element
+yaml: |
+  ---
+  # products purchased
+  - item    : Super Hoop
+  - item    : Basketball
+    quantity: 1
+  - item:
+      name: Big Shoes
+      nick: Biggies
+    quantity: 1
+php: |
+  array (
+    array (
+      'item' => 'Super Hoop',
+    ),
+    array (
+      'item' => 'Basketball',
+      'quantity' => 1,
+    ),
+    array (
+      'item' => array(
+        'name' => 'Big Shoes',
+        'nick' => 'Biggies'
+      ),
+      'quantity' => 1
+    )
+  )
+---
+test: Compact notation combined with inline notation
+brief: |
+    Combinations of compact and inline notation are allowed
+yaml: |
+  ---
+  items:
+    - { item: Super Hoop, quantity: 1 }
+    - [ Basketball, Big Shoes ]
+php: |
+  array (
+    'items' => array (
+      array (
+        'item' => 'Super Hoop',
+        'quantity' => 1,
+      ),
+      array (
+        'Basketball',
+        'Big Shoes'
+      )
+    )
+  )
+--- %YAML:1.0
+test: Compact notation
+brief: |
+    Compact notation for sets of mappings with single element
+yaml: |
+  ---
+  # products purchased
+  - item    : Super Hoop
+  - item    : Basketball
+    quantity: 1
+  - item:
+      name: Big Shoes
+      nick: Biggies
+    quantity: 1
+php: |
+  array (
+    array (
+      'item' => 'Super Hoop',
+    ),
+    array (
+      'item' => 'Basketball',
+      'quantity' => 1,
+    ),
+    array (
+      'item' => array(
+        'name' => 'Big Shoes',
+        'nick' => 'Biggies'
+      ),
+      'quantity' => 1
+    )
+  )
+---
+test: Compact notation combined with inline notation
+brief: |
+    Combinations of compact and inline notation are allowed
+yaml: |
+  ---
+  items:
+    - { item: Super Hoop, quantity: 1 }
+    - [ Basketball, Big Shoes ]
+php: |
+  array (
+    'items' => array (
+      array (
+        'item' => 'Super Hoop',
+        'quantity' => 1,
+      ),
+      array (
+        'Basketball',
+        'Big Shoes'
+      )
+    )
+  )
+--- %YAML:1.0
+test: Compact notation
+brief: |
+    Compact notation for sets of mappings with single element
+yaml: |
+  ---
+  # products purchased
+  - item    : Super Hoop
+  - item    : Basketball
+    quantity: 1
+  - item:
+      name: Big Shoes
+      nick: Biggies
+    quantity: 1
+php: |
+  array (
+    array (
+      'item' => 'Super Hoop',
+    ),
+    array (
+      'item' => 'Basketball',
+      'quantity' => 1,
+    ),
+    array (
+      'item' => array(
+        'name' => 'Big Shoes',
+        'nick' => 'Biggies'
+      ),
+      'quantity' => 1
+    )
+  )
+---
+test: Compact notation combined with inline notation
+brief: |
+    Combinations of compact and inline notation are allowed
+yaml: |
+  ---
+  items:
+    - { item: Super Hoop, quantity: 1 }
+    - [ Basketball, Big Shoes ]
+php: |
+  array (
+    'items' => array (
+      array (
+        'item' => 'Super Hoop',
+        'quantity' => 1,
+      ),
+      array (
+        'Basketball',
+        'Big Shoes'
+      )
+    )
+  )
diff --git a/vendor/symfony/yaml/Tests/Fixtures/sfMergeKey.yml b/vendor/symfony/yaml/Tests/Fixtures/sfMergeKey.yml
new file mode 100644
index 0000000..83264cf
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/Fixtures/sfMergeKey.yml
@@ -0,0 +1,61 @@
+--- %YAML:1.0
+test: Simple In Place Substitution
+brief: >
+    If you want to reuse an entire alias, only overwriting what is different
+    you can use a << in place substitution. This is not part of the official
+    YAML spec, but a widely implemented extension. See the following URL for
+    details: http://yaml.org/type/merge.html
+yaml: |
+    foo: &foo
+        a: Steve
+        b: Clark
+        c: Brian
+        e: notnull
+    bar:
+        a: before
+        d: other
+        e: ~
+        <<: *foo
+        b: new
+        x: Oren
+        c:
+            foo: bar
+            bar: foo
+    bar_inline: {a: before, d: other, <<: *foo, b: new, x: Oren, c: { foo: bar, bar: foo}}
+    foo2: &foo2
+        a: Ballmer
+    ding: &dong [ fi, fei, fo, fam]
+    check:
+        <<:
+            - *foo
+            - *dong
+        isit: tested
+    head:
+        <<: [ *foo , *dong , *foo2 ]
+    taz: &taz
+        a: Steve
+        w:
+            p: 1234
+    nested:
+        <<: *taz
+        d: Doug
+        w: &nestedref
+            p: 12345
+        z:
+            <<: *nestedref
+    head_inline: &head_inline { <<: [ *foo , *dong , *foo2 ] }
+    recursive_inline: { <<: *head_inline, c: { <<: *foo2 } }
+php: |
+    array(
+        'foo' => array('a' => 'Steve', 'b' => 'Clark', 'c' => 'Brian', 'e' => 'notnull'),
+        'bar' => array('a' => 'before', 'd' => 'other', 'e' => null, 'b' => 'new', 'c' => array('foo' => 'bar', 'bar' => 'foo'), 'x' => 'Oren'),
+        'bar_inline' => array('a' => 'before', 'd' => 'other', 'b' => 'new', 'c' => array('foo' => 'bar', 'bar' => 'foo'), 'e' => 'notnull', 'x' => 'Oren'),
+        'foo2' => array('a' => 'Ballmer'),
+        'ding' => array('fi', 'fei', 'fo', 'fam'),
+        'check' => array('a' => 'Steve', 'b' => 'Clark', 'c' => 'Brian', 'e' => 'notnull', 'fi', 'fei', 'fo', 'fam', 'isit' => 'tested'),
+        'head' => array('a' => 'Steve', 'b' => 'Clark', 'c' => 'Brian', 'e' => 'notnull', 'fi', 'fei', 'fo', 'fam'),
+        'taz' => array('a' => 'Steve', 'w' => array('p' => 1234)),
+        'nested' => array('a' => 'Steve', 'w' => array('p' => 12345), 'd' => 'Doug', 'z' => array('p' => 12345)),
+        'head_inline' => array('a' => 'Steve', 'b' => 'Clark', 'c' => 'Brian', 'e' => 'notnull', 'fi', 'fei', 'fo', 'fam'),
+        'recursive_inline' => array('a' => 'Steve', 'b' => 'Clark', 'c' => array('a' => 'Ballmer'), 'e' => 'notnull', 'fi', 'fei', 'fo', 'fam'),
+    )
diff --git a/vendor/symfony/yaml/Tests/Fixtures/sfObjects.yml b/vendor/symfony/yaml/Tests/Fixtures/sfObjects.yml
new file mode 100644
index 0000000..ee124b2
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/Fixtures/sfObjects.yml
@@ -0,0 +1,11 @@
+--- %YAML:1.0
+test: Objects
+brief: >
+    Comments at the end of a line
+yaml: |
+    ex1: "foo # bar"
+    ex2: "foo # bar" # comment
+    ex3: 'foo # bar' # comment
+    ex4: foo # comment
+php: |
+    array('ex1' => 'foo # bar', 'ex2' => 'foo # bar', 'ex3' => 'foo # bar', 'ex4' => 'foo')
diff --git a/vendor/symfony/yaml/Tests/Fixtures/sfQuotes.yml b/vendor/symfony/yaml/Tests/Fixtures/sfQuotes.yml
new file mode 100644
index 0000000..7c60bae
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/Fixtures/sfQuotes.yml
@@ -0,0 +1,33 @@
+--- %YAML:1.0
+test: Some characters at the beginning of a string must be escaped
+brief: >
+    Some characters at the beginning of a string must be escaped
+yaml: |
+    foo: '| bar'
+php: |
+    array('foo' => '| bar')
+---
+test: A key can be a quoted string
+brief: >
+  A key can be a quoted string
+yaml: |
+    "foo1": bar
+    'foo2': bar
+    "foo \" bar": bar
+    'foo '' bar': bar
+    'foo3: ': bar
+    "foo4: ": bar
+    foo5: { "foo \" bar: ": bar, 'foo '' bar: ': bar }
+php: |
+    array(
+      'foo1' => 'bar',
+      'foo2' => 'bar',
+      'foo " bar' => 'bar',
+      'foo \' bar' => 'bar',
+      'foo3: ' => 'bar',
+      'foo4: ' => 'bar',
+      'foo5' => array(
+        'foo " bar: ' => 'bar',
+        'foo \' bar: ' => 'bar',
+      ),
+    )
diff --git a/vendor/symfony/yaml/Tests/Fixtures/sfTests.yml b/vendor/symfony/yaml/Tests/Fixtures/sfTests.yml
new file mode 100644
index 0000000..2a0b9c8
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/Fixtures/sfTests.yml
@@ -0,0 +1,140 @@
+--- %YAML:1.0
+test: Multiple quoted string on one line
+brief: >
+    Multiple quoted string on one line
+yaml: |
+    stripped_title: { name: "foo bar", help: "bar foo" }
+php: |
+    array('stripped_title' => array('name' => 'foo bar', 'help' => 'bar foo'))
+---
+test: Empty sequence
+yaml: |
+    foo: [ ]
+php: |
+    array('foo' => array())
+---
+test: Empty value
+yaml: |
+    foo:
+php: |
+    array('foo' => null)
+---
+test: Inline string parsing
+brief: >
+    Inline string parsing
+yaml: |
+    test: ['complex: string', 'another [string]']
+php: |
+    array('test' => array('complex: string', 'another [string]'))
+---
+test: Boolean
+brief: >
+    Boolean
+yaml: |
+    - false
+    - true
+    - null
+    - ~
+    - 'false'
+    - 'true'
+    - 'null'
+    - '~'
+php: |
+    array(
+      false,
+      true,
+      null,
+      null,
+      'false',
+      'true',
+      'null',
+      '~',
+    )
+---
+test: Empty lines in literal blocks
+brief: >
+  Empty lines in literal blocks
+yaml: |
+  foo:
+    bar: |
+      foo
+
+
+        
+      bar
+php: |
+  array('foo' => array('bar' => "foo\n\n\n  \nbar\n"))
+---
+test: Empty lines in folded blocks
+brief: >
+  Empty lines in folded blocks
+yaml: |
+  foo:
+    bar: >
+
+      foo
+
+      
+      bar
+php: |
+  array('foo' => array('bar' => "\nfoo\n\nbar\n"))
+---
+test: IP addresses
+brief: >
+  IP addresses
+yaml: |
+  foo: 10.0.0.2
+php: |
+  array('foo' => '10.0.0.2')
+---
+test: A sequence with an embedded mapping
+brief: >
+  A sequence with an embedded mapping
+yaml: |
+  - foo
+  - bar: { bar: foo }
+php: |
+  array('foo', array('bar' => array('bar' => 'foo')))
+---
+test: Octal
+brief: as in spec example 2.19, octal value is converted
+yaml: |
+  foo: 0123
+php: |
+  array('foo' => 83)
+---
+test: Octal strings
+brief: Octal notation in a string must remain a string
+yaml: |
+  foo: "0123"
+php: |
+  array('foo' => '0123')
+---
+test: Octal strings
+brief: Octal notation in a string must remain a string
+yaml: |
+  foo: '0123'
+php: |
+  array('foo' => '0123')
+---
+test: Octal strings
+brief: Octal notation in a string must remain a string
+yaml: |
+  foo: |
+    0123
+php: |
+  array('foo' => "0123\n")
+---
+test: Document as a simple hash
+brief: Document as a simple hash
+yaml: |
+  { foo: bar }
+php: |
+  array('foo' => 'bar')
+---
+test: Document as a simple array
+brief: Document as a simple array
+yaml: |
+  [ foo, bar ]
+php: |
+  array('foo', 'bar')
diff --git a/vendor/symfony/yaml/Tests/Fixtures/unindentedCollections.yml b/vendor/symfony/yaml/Tests/Fixtures/unindentedCollections.yml
new file mode 100644
index 0000000..0c96108
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/Fixtures/unindentedCollections.yml
@@ -0,0 +1,82 @@
+--- %YAML:1.0
+test: Unindented collection
+brief: >
+    Unindented collection
+yaml: |
+    collection:
+    - item1
+    - item2
+    - item3
+php: |
+    array('collection' => array('item1', 'item2', 'item3'))
+---
+test: Nested unindented collection (two levels)
+brief: >
+    Nested unindented collection
+yaml: |
+    collection:
+        key:
+        - a
+        - b
+        - c
+php: |
+    array('collection' => array('key' => array('a', 'b', 'c')))
+---
+test: Nested unindented collection (three levels)
+brief: >
+    Nested unindented collection
+yaml: |
+    collection:
+        key:
+            subkey:
+            - one
+            - two
+            - three
+php: |
+    array('collection' => array('key' => array('subkey' => array('one', 'two', 'three'))))
+---
+test: Key/value after unindented collection (1)
+brief: >
+    Key/value after unindented collection (1)
+yaml: |
+    collection:
+        key:
+        - a
+        - b
+        - c
+    foo: bar
+php: |
+    array('collection' => array('key' => array('a', 'b', 'c')), 'foo' => 'bar')
+---
+test: Key/value after unindented collection (at the same level)
+brief: >
+    Key/value after unindented collection
+yaml: |
+    collection:
+        key:
+        - a
+        - b
+        - c
+        foo: bar
+php: |
+    array('collection' => array('key' => array('a', 'b', 'c'), 'foo' => 'bar'))
+---
+test: Shortcut Key after unindented collection
+brief: >
+    Key/value after unindented collection
+yaml: |
+    collection:
+    - key: foo
+      foo: bar
+php: |
+    array('collection' => array(array('key' => 'foo', 'foo' => 'bar')))
+---
+test: Shortcut Key after unindented collection with custom spaces
+brief: >
+    Key/value after unindented collection
+yaml: |
+    collection:
+    -  key: foo
+       foo: bar
+php: |
+    array('collection' => array(array('key' => 'foo', 'foo' => 'bar')))
diff --git a/vendor/symfony/yaml/Tests/InlineTest.php b/vendor/symfony/yaml/Tests/InlineTest.php
new file mode 100644
index 0000000..7ba46bd
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/InlineTest.php
@@ -0,0 +1,760 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Yaml\Tests;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Yaml\Exception\ParseException;
+use Symfony\Component\Yaml\Inline;
+use Symfony\Component\Yaml\Tag\TaggedValue;
+use Symfony\Component\Yaml\Yaml;
+
+class InlineTest extends TestCase
+{
+    protected function setUp()
+    {
+        Inline::initialize(0, 0);
+    }
+
+    /**
+     * @dataProvider getTestsForParse
+     */
+    public function testParse($yaml, $value, $flags = 0)
+    {
+        $this->assertSame($value, Inline::parse($yaml, $flags), sprintf('::parse() converts an inline YAML to a PHP structure (%s)', $yaml));
+    }
+
+    /**
+     * @dataProvider getTestsForParseWithMapObjects
+     */
+    public function testParseWithMapObjects($yaml, $value, $flags = Yaml::PARSE_OBJECT_FOR_MAP)
+    {
+        $actual = Inline::parse($yaml, $flags);
+
+        $this->assertSame(serialize($value), serialize($actual));
+    }
+
+    /**
+     * @dataProvider getTestsForParsePhpConstants
+     */
+    public function testParsePhpConstants($yaml, $value)
+    {
+        $actual = Inline::parse($yaml, Yaml::PARSE_CONSTANT);
+
+        $this->assertSame($value, $actual);
+    }
+
+    public function getTestsForParsePhpConstants()
+    {
+        return array(
+            array('!php/const Symfony\Component\Yaml\Yaml::PARSE_CONSTANT', Yaml::PARSE_CONSTANT),
+            array('!php/const PHP_INT_MAX', PHP_INT_MAX),
+            array('[!php/const PHP_INT_MAX]', array(PHP_INT_MAX)),
+            array('{ foo: !php/const PHP_INT_MAX }', array('foo' => PHP_INT_MAX)),
+            array('!php/const NULL', null),
+        );
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessage The constant "WRONG_CONSTANT" is not defined
+     */
+    public function testParsePhpConstantThrowsExceptionWhenUndefined()
+    {
+        Inline::parse('!php/const WRONG_CONSTANT', Yaml::PARSE_CONSTANT);
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessageRegExp #The string "!php/const PHP_INT_MAX" could not be parsed as a constant.*#
+     */
+    public function testParsePhpConstantThrowsExceptionOnInvalidType()
+    {
+        Inline::parse('!php/const PHP_INT_MAX', Yaml::PARSE_EXCEPTION_ON_INVALID_TYPE);
+    }
+
+    /**
+     * @dataProvider getTestsForDump
+     */
+    public function testDump($yaml, $value, $parseFlags = 0)
+    {
+        $this->assertEquals($yaml, Inline::dump($value), sprintf('::dump() converts a PHP structure to an inline YAML (%s)', $yaml));
+
+        $this->assertSame($value, Inline::parse(Inline::dump($value), $parseFlags), 'check consistency');
+    }
+
+    public function testDumpNumericValueWithLocale()
+    {
+        $locale = setlocale(LC_NUMERIC, 0);
+        if (false === $locale) {
+            $this->markTestSkipped('Your platform does not support locales.');
+        }
+
+        try {
+            $requiredLocales = array('fr_FR.UTF-8', 'fr_FR.UTF8', 'fr_FR.utf-8', 'fr_FR.utf8', 'French_France.1252');
+            if (false === setlocale(LC_NUMERIC, $requiredLocales)) {
+                $this->markTestSkipped('Could not set any of required locales: '.implode(', ', $requiredLocales));
+            }
+
+            $this->assertEquals('1.2', Inline::dump(1.2));
+            $this->assertContains('fr', strtolower(setlocale(LC_NUMERIC, 0)));
+        } finally {
+            setlocale(LC_NUMERIC, $locale);
+        }
+    }
+
+    public function testHashStringsResemblingExponentialNumericsShouldNotBeChangedToINF()
+    {
+        $value = '686e444';
+
+        $this->assertSame($value, Inline::parse(Inline::dump($value)));
+    }
+
+    /**
+     * @expectedException        \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessage Found unknown escape character "\V".
+     */
+    public function testParseScalarWithNonEscapedBlackslashShouldThrowException()
+    {
+        Inline::parse('"Foo\Var"');
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     */
+    public function testParseScalarWithNonEscapedBlackslashAtTheEndShouldThrowException()
+    {
+        Inline::parse('"Foo\\"');
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     */
+    public function testParseScalarWithIncorrectlyQuotedStringShouldThrowException()
+    {
+        $value = "'don't do somthin' like that'";
+        Inline::parse($value);
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     */
+    public function testParseScalarWithIncorrectlyDoubleQuotedStringShouldThrowException()
+    {
+        $value = '"don"t do somthin" like that"';
+        Inline::parse($value);
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     */
+    public function testParseInvalidMappingKeyShouldThrowException()
+    {
+        $value = '{ "foo " bar": "bar" }';
+        Inline::parse($value);
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessage Colons must be followed by a space or an indication character (i.e. " ", ",", "[", "]", "{", "}")
+     */
+    public function testParseMappingKeyWithColonNotFollowedBySpace()
+    {
+        Inline::parse('{foo:""}');
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     */
+    public function testParseInvalidMappingShouldThrowException()
+    {
+        Inline::parse('[foo] bar');
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     */
+    public function testParseInvalidSequenceShouldThrowException()
+    {
+        Inline::parse('{ foo: bar } bar');
+    }
+
+    public function testParseScalarWithCorrectlyQuotedStringShouldReturnString()
+    {
+        $value = "'don''t do somthin'' like that'";
+        $expect = "don't do somthin' like that";
+
+        $this->assertSame($expect, Inline::parseScalar($value));
+    }
+
+    /**
+     * @dataProvider getDataForParseReferences
+     */
+    public function testParseReferences($yaml, $expected)
+    {
+        $this->assertSame($expected, Inline::parse($yaml, 0, array('var' => 'var-value')));
+    }
+
+    public function getDataForParseReferences()
+    {
+        return array(
+            'scalar' => array('*var', 'var-value'),
+            'list' => array('[ *var ]', array('var-value')),
+            'list-in-list' => array('[[ *var ]]', array(array('var-value'))),
+            'map-in-list' => array('[ { key: *var } ]', array(array('key' => 'var-value'))),
+            'embedded-mapping-in-list' => array('[ key: *var ]', array(array('key' => 'var-value'))),
+            'map' => array('{ key: *var }', array('key' => 'var-value')),
+            'list-in-map' => array('{ key: [*var] }', array('key' => array('var-value'))),
+            'map-in-map' => array('{ foo: { bar: *var } }', array('foo' => array('bar' => 'var-value'))),
+        );
+    }
+
+    public function testParseMapReferenceInSequence()
+    {
+        $foo = array(
+            'a' => 'Steve',
+            'b' => 'Clark',
+            'c' => 'Brian',
+        );
+        $this->assertSame(array($foo), Inline::parse('[*foo]', 0, array('foo' => $foo)));
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessage A reference must contain at least one character at line 1.
+     */
+    public function testParseUnquotedAsterisk()
+    {
+        Inline::parse('{ foo: * }');
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessage A reference must contain at least one character at line 1.
+     */
+    public function testParseUnquotedAsteriskFollowedByAComment()
+    {
+        Inline::parse('{ foo: * #foo }');
+    }
+
+    /**
+     * @dataProvider getReservedIndicators
+     */
+    public function testParseUnquotedScalarStartingWithReservedIndicator($indicator)
+    {
+        if (method_exists($this, 'expectExceptionMessage')) {
+            $this->expectException(ParseException::class);
+            $this->expectExceptionMessage(sprintf('cannot start a plain scalar; you need to quote the scalar at line 1 (near "%sfoo").', $indicator));
+        } else {
+            $this->setExpectedException(ParseException::class, sprintf('cannot start a plain scalar; you need to quote the scalar at line 1 (near "%sfoo").', $indicator));
+        }
+
+        Inline::parse(sprintf('{ foo: %sfoo }', $indicator));
+    }
+
+    public function getReservedIndicators()
+    {
+        return array(array('@'), array('`'));
+    }
+
+    /**
+     * @dataProvider getScalarIndicators
+     */
+    public function testParseUnquotedScalarStartingWithScalarIndicator($indicator)
+    {
+        if (method_exists($this, 'expectExceptionMessage')) {
+            $this->expectException(ParseException::class);
+            $this->expectExceptionMessage(sprintf('cannot start a plain scalar; you need to quote the scalar at line 1 (near "%sfoo").', $indicator));
+        } else {
+            $this->setExpectedException(ParseException::class, sprintf('cannot start a plain scalar; you need to quote the scalar at line 1 (near "%sfoo").', $indicator));
+        }
+
+        Inline::parse(sprintf('{ foo: %sfoo }', $indicator));
+    }
+
+    public function getScalarIndicators()
+    {
+        return array(array('|'), array('>'), array('%'));
+    }
+
+    /**
+     * @dataProvider getDataForIsHash
+     */
+    public function testIsHash($array, $expected)
+    {
+        $this->assertSame($expected, Inline::isHash($array));
+    }
+
+    public function getDataForIsHash()
+    {
+        return array(
+            array(array(), false),
+            array(array(1, 2, 3), false),
+            array(array(2 => 1, 1 => 2, 0 => 3), true),
+            array(array('foo' => 1, 'bar' => 2), true),
+        );
+    }
+
+    public function getTestsForParse()
+    {
+        return array(
+            array('', ''),
+            array('null', null),
+            array('false', false),
+            array('true', true),
+            array('12', 12),
+            array('-12', -12),
+            array('1_2', 12),
+            array('_12', '_12'),
+            array('12_', 12),
+            array('"quoted string"', 'quoted string'),
+            array("'quoted string'", 'quoted string'),
+            array('12.30e+02', 12.30e+02),
+            array('123.45_67', 123.4567),
+            array('0x4D2', 0x4D2),
+            array('0x_4_D_2_', 0x4D2),
+            array('02333', 02333),
+            array('0_2_3_3_3', 02333),
+            array('.Inf', -log(0)),
+            array('-.Inf', log(0)),
+            array("'686e444'", '686e444'),
+            array('686e444', 646e444),
+            array('123456789123456789123456789123456789', '123456789123456789123456789123456789'),
+            array('"foo\r\nbar"', "foo\r\nbar"),
+            array("'foo#bar'", 'foo#bar'),
+            array("'foo # bar'", 'foo # bar'),
+            array("'#cfcfcf'", '#cfcfcf'),
+            array('::form_base.html.twig', '::form_base.html.twig'),
+
+            // Pre-YAML-1.2 booleans
+            array("'y'", 'y'),
+            array("'n'", 'n'),
+            array("'yes'", 'yes'),
+            array("'no'", 'no'),
+            array("'on'", 'on'),
+            array("'off'", 'off'),
+
+            array('2007-10-30', gmmktime(0, 0, 0, 10, 30, 2007)),
+            array('2007-10-30T02:59:43Z', gmmktime(2, 59, 43, 10, 30, 2007)),
+            array('2007-10-30 02:59:43 Z', gmmktime(2, 59, 43, 10, 30, 2007)),
+            array('1960-10-30 02:59:43 Z', gmmktime(2, 59, 43, 10, 30, 1960)),
+            array('1730-10-30T02:59:43Z', gmmktime(2, 59, 43, 10, 30, 1730)),
+
+            array('"a \\"string\\" with \'quoted strings inside\'"', 'a "string" with \'quoted strings inside\''),
+            array("'a \"string\" with ''quoted strings inside'''", 'a "string" with \'quoted strings inside\''),
+
+            // sequences
+            // urls are no key value mapping. see #3609. Valid yaml "key: value" mappings require a space after the colon
+            array('[foo, http://urls.are/no/mappings, false, null, 12]', array('foo', 'http://urls.are/no/mappings', false, null, 12)),
+            array('[  foo  ,   bar , false  ,  null     ,  12  ]', array('foo', 'bar', false, null, 12)),
+            array('[\'foo,bar\', \'foo bar\']', array('foo,bar', 'foo bar')),
+
+            // mappings
+            array('{foo: bar,bar: foo,"false": false, "null": null,integer: 12}', array('foo' => 'bar', 'bar' => 'foo', 'false' => false, 'null' => null, 'integer' => 12)),
+            array('{ foo  : bar, bar : foo, "false"  :   false,  "null"  :   null,  integer :  12  }', array('foo' => 'bar', 'bar' => 'foo', 'false' => false, 'null' => null, 'integer' => 12)),
+            array('{foo: \'bar\', bar: \'foo: bar\'}', array('foo' => 'bar', 'bar' => 'foo: bar')),
+            array('{\'foo\': \'bar\', "bar": \'foo: bar\'}', array('foo' => 'bar', 'bar' => 'foo: bar')),
+            array('{\'foo\'\'\': \'bar\', "bar\"": \'foo: bar\'}', array('foo\'' => 'bar', 'bar"' => 'foo: bar')),
+            array('{\'foo: \': \'bar\', "bar: ": \'foo: bar\'}', array('foo: ' => 'bar', 'bar: ' => 'foo: bar')),
+            array('{"foo:bar": "baz"}', array('foo:bar' => 'baz')),
+            array('{"foo":"bar"}', array('foo' => 'bar')),
+
+            // nested sequences and mappings
+            array('[foo, [bar, foo]]', array('foo', array('bar', 'foo'))),
+            array('[foo, {bar: foo}]', array('foo', array('bar' => 'foo'))),
+            array('{ foo: {bar: foo} }', array('foo' => array('bar' => 'foo'))),
+            array('{ foo: [bar, foo] }', array('foo' => array('bar', 'foo'))),
+            array('{ foo:{bar: foo} }', array('foo' => array('bar' => 'foo'))),
+            array('{ foo:[bar, foo] }', array('foo' => array('bar', 'foo'))),
+
+            array('[  foo, [  bar, foo  ]  ]', array('foo', array('bar', 'foo'))),
+
+            array('[{ foo: {bar: foo} }]', array(array('foo' => array('bar' => 'foo')))),
+
+            array('[foo, [bar, [foo, [bar, foo]], foo]]', array('foo', array('bar', array('foo', array('bar', 'foo')), 'foo'))),
+
+            array('[foo, {bar: foo, foo: [foo, {bar: foo}]}, [foo, {bar: foo}]]', array('foo', array('bar' => 'foo', 'foo' => array('foo', array('bar' => 'foo'))), array('foo', array('bar' => 'foo')))),
+
+            array('[foo, bar: { foo: bar }]', array('foo', '1' => array('bar' => array('foo' => 'bar')))),
+            array('[foo, \'@foo.baz\', { \'%foo%\': \'foo is %foo%\', bar: \'%foo%\' }, true, \'@service_container\']', array('foo', '@foo.baz', array('%foo%' => 'foo is %foo%', 'bar' => '%foo%'), true, '@service_container')),
+        );
+    }
+
+    public function getTestsForParseWithMapObjects()
+    {
+        return array(
+            array('', ''),
+            array('null', null),
+            array('false', false),
+            array('true', true),
+            array('12', 12),
+            array('-12', -12),
+            array('"quoted string"', 'quoted string'),
+            array("'quoted string'", 'quoted string'),
+            array('12.30e+02', 12.30e+02),
+            array('0x4D2', 0x4D2),
+            array('02333', 02333),
+            array('.Inf', -log(0)),
+            array('-.Inf', log(0)),
+            array("'686e444'", '686e444'),
+            array('686e444', 646e444),
+            array('123456789123456789123456789123456789', '123456789123456789123456789123456789'),
+            array('"foo\r\nbar"', "foo\r\nbar"),
+            array("'foo#bar'", 'foo#bar'),
+            array("'foo # bar'", 'foo # bar'),
+            array("'#cfcfcf'", '#cfcfcf'),
+            array('::form_base.html.twig', '::form_base.html.twig'),
+
+            array('2007-10-30', gmmktime(0, 0, 0, 10, 30, 2007)),
+            array('2007-10-30T02:59:43Z', gmmktime(2, 59, 43, 10, 30, 2007)),
+            array('2007-10-30 02:59:43 Z', gmmktime(2, 59, 43, 10, 30, 2007)),
+            array('1960-10-30 02:59:43 Z', gmmktime(2, 59, 43, 10, 30, 1960)),
+            array('1730-10-30T02:59:43Z', gmmktime(2, 59, 43, 10, 30, 1730)),
+
+            array('"a \\"string\\" with \'quoted strings inside\'"', 'a "string" with \'quoted strings inside\''),
+            array("'a \"string\" with ''quoted strings inside'''", 'a "string" with \'quoted strings inside\''),
+
+            // sequences
+            // urls are no key value mapping. see #3609. Valid yaml "key: value" mappings require a space after the colon
+            array('[foo, http://urls.are/no/mappings, false, null, 12]', array('foo', 'http://urls.are/no/mappings', false, null, 12)),
+            array('[  foo  ,   bar , false  ,  null     ,  12  ]', array('foo', 'bar', false, null, 12)),
+            array('[\'foo,bar\', \'foo bar\']', array('foo,bar', 'foo bar')),
+
+            // mappings
+            array('{foo: bar,bar: foo,"false": false,"null": null,integer: 12}', (object) array('foo' => 'bar', 'bar' => 'foo', 'false' => false, 'null' => null, 'integer' => 12), Yaml::PARSE_OBJECT_FOR_MAP),
+            array('{ foo  : bar, bar : foo,  "false"  :   false,  "null"  :   null,  integer :  12  }', (object) array('foo' => 'bar', 'bar' => 'foo', 'false' => false, 'null' => null, 'integer' => 12), Yaml::PARSE_OBJECT_FOR_MAP),
+            array('{foo: \'bar\', bar: \'foo: bar\'}', (object) array('foo' => 'bar', 'bar' => 'foo: bar')),
+            array('{\'foo\': \'bar\', "bar": \'foo: bar\'}', (object) array('foo' => 'bar', 'bar' => 'foo: bar')),
+            array('{\'foo\'\'\': \'bar\', "bar\"": \'foo: bar\'}', (object) array('foo\'' => 'bar', 'bar"' => 'foo: bar')),
+            array('{\'foo: \': \'bar\', "bar: ": \'foo: bar\'}', (object) array('foo: ' => 'bar', 'bar: ' => 'foo: bar')),
+            array('{"foo:bar": "baz"}', (object) array('foo:bar' => 'baz')),
+            array('{"foo":"bar"}', (object) array('foo' => 'bar')),
+
+            // nested sequences and mappings
+            array('[foo, [bar, foo]]', array('foo', array('bar', 'foo'))),
+            array('[foo, {bar: foo}]', array('foo', (object) array('bar' => 'foo'))),
+            array('{ foo: {bar: foo} }', (object) array('foo' => (object) array('bar' => 'foo'))),
+            array('{ foo: [bar, foo] }', (object) array('foo' => array('bar', 'foo'))),
+
+            array('[  foo, [  bar, foo  ]  ]', array('foo', array('bar', 'foo'))),
+
+            array('[{ foo: {bar: foo} }]', array((object) array('foo' => (object) array('bar' => 'foo')))),
+
+            array('[foo, [bar, [foo, [bar, foo]], foo]]', array('foo', array('bar', array('foo', array('bar', 'foo')), 'foo'))),
+
+            array('[foo, {bar: foo, foo: [foo, {bar: foo}]}, [foo, {bar: foo}]]', array('foo', (object) array('bar' => 'foo', 'foo' => array('foo', (object) array('bar' => 'foo'))), array('foo', (object) array('bar' => 'foo')))),
+
+            array('[foo, bar: { foo: bar }]', array('foo', '1' => (object) array('bar' => (object) array('foo' => 'bar')))),
+            array('[foo, \'@foo.baz\', { \'%foo%\': \'foo is %foo%\', bar: \'%foo%\' }, true, \'@service_container\']', array('foo', '@foo.baz', (object) array('%foo%' => 'foo is %foo%', 'bar' => '%foo%'), true, '@service_container')),
+
+            array('{}', new \stdClass()),
+            array('{ foo  : bar, bar : {}  }', (object) array('foo' => 'bar', 'bar' => new \stdClass())),
+            array('{ foo  : [], bar : {}  }', (object) array('foo' => array(), 'bar' => new \stdClass())),
+            array('{foo: \'bar\', bar: {} }', (object) array('foo' => 'bar', 'bar' => new \stdClass())),
+            array('{\'foo\': \'bar\', "bar": {}}', (object) array('foo' => 'bar', 'bar' => new \stdClass())),
+            array('{\'foo\': \'bar\', "bar": \'{}\'}', (object) array('foo' => 'bar', 'bar' => '{}')),
+
+            array('[foo, [{}, {}]]', array('foo', array(new \stdClass(), new \stdClass()))),
+            array('[foo, [[], {}]]', array('foo', array(array(), new \stdClass()))),
+            array('[foo, [[{}, {}], {}]]', array('foo', array(array(new \stdClass(), new \stdClass()), new \stdClass()))),
+            array('[foo, {bar: {}}]', array('foo', '1' => (object) array('bar' => new \stdClass()))),
+        );
+    }
+
+    public function getTestsForDump()
+    {
+        return array(
+            array('null', null),
+            array('false', false),
+            array('true', true),
+            array('12', 12),
+            array("'1_2'", '1_2'),
+            array('_12', '_12'),
+            array("'12_'", '12_'),
+            array("'quoted string'", 'quoted string'),
+            array('!!float 1230', 12.30e+02),
+            array('1234', 0x4D2),
+            array('1243', 02333),
+            array("'0x_4_D_2_'", '0x_4_D_2_'),
+            array("'0_2_3_3_3'", '0_2_3_3_3'),
+            array('.Inf', -log(0)),
+            array('-.Inf', log(0)),
+            array("'686e444'", '686e444'),
+            array('"foo\r\nbar"', "foo\r\nbar"),
+            array("'foo#bar'", 'foo#bar'),
+            array("'foo # bar'", 'foo # bar'),
+            array("'#cfcfcf'", '#cfcfcf'),
+
+            array("'a \"string\" with ''quoted strings inside'''", 'a "string" with \'quoted strings inside\''),
+
+            array("'-dash'", '-dash'),
+            array("'-'", '-'),
+
+            // Pre-YAML-1.2 booleans
+            array("'y'", 'y'),
+            array("'n'", 'n'),
+            array("'yes'", 'yes'),
+            array("'no'", 'no'),
+            array("'on'", 'on'),
+            array("'off'", 'off'),
+
+            // sequences
+            array('[foo, bar, false, null, 12]', array('foo', 'bar', false, null, 12)),
+            array('[\'foo,bar\', \'foo bar\']', array('foo,bar', 'foo bar')),
+
+            // mappings
+            array('{ foo: bar, bar: foo, \'false\': false, \'null\': null, integer: 12 }', array('foo' => 'bar', 'bar' => 'foo', 'false' => false, 'null' => null, 'integer' => 12)),
+            array('{ foo: bar, bar: \'foo: bar\' }', array('foo' => 'bar', 'bar' => 'foo: bar')),
+
+            // nested sequences and mappings
+            array('[foo, [bar, foo]]', array('foo', array('bar', 'foo'))),
+
+            array('[foo, [bar, [foo, [bar, foo]], foo]]', array('foo', array('bar', array('foo', array('bar', 'foo')), 'foo'))),
+
+            array('{ foo: { bar: foo } }', array('foo' => array('bar' => 'foo'))),
+
+            array('[foo, { bar: foo }]', array('foo', array('bar' => 'foo'))),
+
+            array('[foo, { bar: foo, foo: [foo, { bar: foo }] }, [foo, { bar: foo }]]', array('foo', array('bar' => 'foo', 'foo' => array('foo', array('bar' => 'foo'))), array('foo', array('bar' => 'foo')))),
+
+            array('[foo, \'@foo.baz\', { \'%foo%\': \'foo is %foo%\', bar: \'%foo%\' }, true, \'@service_container\']', array('foo', '@foo.baz', array('%foo%' => 'foo is %foo%', 'bar' => '%foo%'), true, '@service_container')),
+
+            array('{ foo: { bar: { 1: 2, baz: 3 } } }', array('foo' => array('bar' => array(1 => 2, 'baz' => 3)))),
+        );
+    }
+
+    /**
+     * @dataProvider getTimestampTests
+     */
+    public function testParseTimestampAsUnixTimestampByDefault($yaml, $year, $month, $day, $hour, $minute, $second)
+    {
+        $this->assertSame(gmmktime($hour, $minute, $second, $month, $day, $year), Inline::parse($yaml));
+    }
+
+    /**
+     * @dataProvider getTimestampTests
+     */
+    public function testParseTimestampAsDateTimeObject($yaml, $year, $month, $day, $hour, $minute, $second, $timezone)
+    {
+        $expected = new \DateTime($yaml);
+        $expected->setTimeZone(new \DateTimeZone('UTC'));
+        $expected->setDate($year, $month, $day);
+        $expected->setTime($hour, $minute, $second, 1000000 * ($second - (int) $second));
+
+        $date = Inline::parse($yaml, Yaml::PARSE_DATETIME);
+        $this->assertEquals($expected, $date);
+        $this->assertSame($timezone, $date->format('O'));
+    }
+
+    public function getTimestampTests()
+    {
+        return array(
+            'canonical' => array('2001-12-15T02:59:43.1Z', 2001, 12, 15, 2, 59, 43.1, '+0000'),
+            'ISO-8601' => array('2001-12-15t21:59:43.10-05:00', 2001, 12, 16, 2, 59, 43.1, '-0500'),
+            'spaced' => array('2001-12-15 21:59:43.10 -5', 2001, 12, 16, 2, 59, 43.1, '-0500'),
+            'date' => array('2001-12-15', 2001, 12, 15, 0, 0, 0, '+0000'),
+        );
+    }
+
+    /**
+     * @dataProvider getTimestampTests
+     */
+    public function testParseNestedTimestampListAsDateTimeObject($yaml, $year, $month, $day, $hour, $minute, $second)
+    {
+        $expected = new \DateTime($yaml);
+        $expected->setTimeZone(new \DateTimeZone('UTC'));
+        $expected->setDate($year, $month, $day);
+        $expected->setTime($hour, $minute, $second, 1000000 * ($second - (int) $second));
+
+        $expectedNested = array('nested' => array($expected));
+        $yamlNested = "{nested: [$yaml]}";
+
+        $this->assertEquals($expectedNested, Inline::parse($yamlNested, Yaml::PARSE_DATETIME));
+    }
+
+    /**
+     * @dataProvider getDateTimeDumpTests
+     */
+    public function testDumpDateTime($dateTime, $expected)
+    {
+        $this->assertSame($expected, Inline::dump($dateTime));
+    }
+
+    public function getDateTimeDumpTests()
+    {
+        $tests = array();
+
+        $dateTime = new \DateTime('2001-12-15 21:59:43', new \DateTimeZone('UTC'));
+        $tests['date-time-utc'] = array($dateTime, '2001-12-15T21:59:43+00:00');
+
+        $dateTime = new \DateTimeImmutable('2001-07-15 21:59:43', new \DateTimeZone('Europe/Berlin'));
+        $tests['immutable-date-time-europe-berlin'] = array($dateTime, '2001-07-15T21:59:43+02:00');
+
+        return $tests;
+    }
+
+    /**
+     * @dataProvider getBinaryData
+     */
+    public function testParseBinaryData($data)
+    {
+        $this->assertSame('Hello world', Inline::parse($data));
+    }
+
+    public function getBinaryData()
+    {
+        return array(
+            'enclosed with double quotes' => array('!!binary "SGVsbG8gd29ybGQ="'),
+            'enclosed with single quotes' => array("!!binary 'SGVsbG8gd29ybGQ='"),
+            'containing spaces' => array('!!binary  "SGVs bG8gd 29ybGQ="'),
+        );
+    }
+
+    /**
+     * @dataProvider getInvalidBinaryData
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     */
+    public function testParseInvalidBinaryData($data, $expectedMessage)
+    {
+        if (method_exists($this, 'expectException')) {
+            $this->expectExceptionMessageRegExp($expectedMessage);
+        } else {
+            $this->setExpectedExceptionRegExp(ParseException::class, $expectedMessage);
+        }
+
+        Inline::parse($data);
+    }
+
+    public function getInvalidBinaryData()
+    {
+        return array(
+            'length not a multiple of four' => array('!!binary "SGVsbG8d29ybGQ="', '/The normalized base64 encoded data \(data without whitespace characters\) length must be a multiple of four \(\d+ bytes given\)/'),
+            'invalid characters' => array('!!binary "SGVsbG8#d29ybGQ="', '/The base64 encoded data \(.*\) contains invalid characters/'),
+            'too many equals characters' => array('!!binary "SGVsbG8gd29yb==="', '/The base64 encoded data \(.*\) contains invalid characters/'),
+            'misplaced equals character' => array('!!binary "SGVsbG8gd29ybG=Q"', '/The base64 encoded data \(.*\) contains invalid characters/'),
+        );
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessage Malformed inline YAML string: {this, is not, supported} at line 1.
+     */
+    public function testNotSupportedMissingValue()
+    {
+        Inline::parse('{this, is not, supported}');
+    }
+
+    public function testVeryLongQuotedStrings()
+    {
+        $longStringWithQuotes = str_repeat("x\r\n\\\"x\"x", 1000);
+
+        $yamlString = Inline::dump(array('longStringWithQuotes' => $longStringWithQuotes));
+        $arrayFromYaml = Inline::parse($yamlString);
+
+        $this->assertEquals($longStringWithQuotes, $arrayFromYaml['longStringWithQuotes']);
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessage Missing mapping key
+     */
+    public function testMappingKeysCannotBeOmitted()
+    {
+        Inline::parse('{: foo}');
+    }
+
+    /**
+     * @dataProvider getTestsForNullValues
+     */
+    public function testParseMissingMappingValueAsNull($yaml, $expected)
+    {
+        $this->assertSame($expected, Inline::parse($yaml));
+    }
+
+    public function getTestsForNullValues()
+    {
+        return array(
+            'null before closing curly brace' => array('{foo:}', array('foo' => null)),
+            'null before comma' => array('{foo:, bar: baz}', array('foo' => null, 'bar' => 'baz')),
+        );
+    }
+
+    public function testTheEmptyStringIsAValidMappingKey()
+    {
+        $this->assertSame(array('' => 'foo'), Inline::parse('{ "": foo }'));
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessage Implicit casting of incompatible mapping keys to strings is not supported. Quote your evaluable mapping keys instead
+     *
+     * @dataProvider getNotPhpCompatibleMappingKeyData
+     */
+    public function testImplicitStringCastingOfMappingKeysIsDeprecated($yaml, $expected)
+    {
+        $this->assertSame($expected, Inline::parse($yaml));
+    }
+
+    public function getNotPhpCompatibleMappingKeyData()
+    {
+        return array(
+            'boolean-true' => array('{true: "foo"}', array('true' => 'foo')),
+            'boolean-false' => array('{false: "foo"}', array('false' => 'foo')),
+            'null' => array('{null: "foo"}', array('null' => 'foo')),
+            'float' => array('{0.25: "foo"}', array('0.25' => 'foo')),
+        );
+    }
+
+    public function testTagWithoutValueInSequence()
+    {
+        $value = Inline::parse('[!foo]', Yaml::PARSE_CUSTOM_TAGS);
+
+        $this->assertInstanceOf(TaggedValue::class, $value[0]);
+        $this->assertSame('foo', $value[0]->getTag());
+        $this->assertSame('', $value[0]->getValue());
+    }
+
+    public function testTagWithEmptyValueInSequence()
+    {
+        $value = Inline::parse('[!foo ""]', Yaml::PARSE_CUSTOM_TAGS);
+
+        $this->assertInstanceOf(TaggedValue::class, $value[0]);
+        $this->assertSame('foo', $value[0]->getTag());
+        $this->assertSame('', $value[0]->getValue());
+    }
+
+    public function testTagWithoutValueInMapping()
+    {
+        $value = Inline::parse('{foo: !bar}', Yaml::PARSE_CUSTOM_TAGS);
+
+        $this->assertInstanceOf(TaggedValue::class, $value['foo']);
+        $this->assertSame('bar', $value['foo']->getTag());
+        $this->assertSame('', $value['foo']->getValue());
+    }
+
+    public function testTagWithEmptyValueInMapping()
+    {
+        $value = Inline::parse('{foo: !bar ""}', Yaml::PARSE_CUSTOM_TAGS);
+
+        $this->assertInstanceOf(TaggedValue::class, $value['foo']);
+        $this->assertSame('bar', $value['foo']->getTag());
+        $this->assertSame('', $value['foo']->getValue());
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessage Unexpected end of line, expected one of ",}" at line 1 (near "{abc: 'def'").
+     */
+    public function testUnfinishedInlineMap()
+    {
+        Inline::parse("{abc: 'def'");
+    }
+}
diff --git a/vendor/symfony/yaml/Tests/ParseExceptionTest.php b/vendor/symfony/yaml/Tests/ParseExceptionTest.php
new file mode 100644
index 0000000..39579ed
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/ParseExceptionTest.php
@@ -0,0 +1,34 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Yaml\Tests;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Yaml\Exception\ParseException;
+
+class ParseExceptionTest extends TestCase
+{
+    public function testGetMessage()
+    {
+        $exception = new ParseException('Error message', 42, 'foo: bar', '/var/www/app/config.yml');
+        $message = 'Error message in "/var/www/app/config.yml" at line 42 (near "foo: bar")';
+
+        $this->assertEquals($message, $exception->getMessage());
+    }
+
+    public function testGetMessageWithUnicodeInFilename()
+    {
+        $exception = new ParseException('Error message', 42, 'foo: bar', 'äöü.yml');
+        $message = 'Error message in "äöü.yml" at line 42 (near "foo: bar")';
+
+        $this->assertEquals($message, $exception->getMessage());
+    }
+}
diff --git a/vendor/symfony/yaml/Tests/ParserTest.php b/vendor/symfony/yaml/Tests/ParserTest.php
new file mode 100644
index 0000000..16ad0af
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/ParserTest.php
@@ -0,0 +1,2104 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Yaml\Tests;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Yaml\Exception\ParseException;
+use Symfony\Component\Yaml\Parser;
+use Symfony\Component\Yaml\Tag\TaggedValue;
+use Symfony\Component\Yaml\Yaml;
+
+class ParserTest extends TestCase
+{
+    /** @var Parser */
+    protected $parser;
+
+    protected function setUp()
+    {
+        $this->parser = new Parser();
+    }
+
+    protected function tearDown()
+    {
+        $this->parser = null;
+
+        chmod(__DIR__.'/Fixtures/not_readable.yml', 0644);
+    }
+
+    /**
+     * @dataProvider getDataFormSpecifications
+     */
+    public function testSpecifications($expected, $yaml, $comment)
+    {
+        $this->assertEquals($expected, var_export($this->parser->parse($yaml), true), $comment);
+    }
+
+    public function getDataFormSpecifications()
+    {
+        return $this->loadTestsFromFixtureFiles('index.yml');
+    }
+
+    public function getNonStringMappingKeysData()
+    {
+        return $this->loadTestsFromFixtureFiles('nonStringKeys.yml');
+    }
+
+    public function testTabsInYaml()
+    {
+        // test tabs in YAML
+        $yamls = array(
+            "foo:\n	bar",
+            "foo:\n 	bar",
+            "foo:\n	 bar",
+            "foo:\n 	 bar",
+        );
+
+        foreach ($yamls as $yaml) {
+            try {
+                $content = $this->parser->parse($yaml);
+
+                $this->fail('YAML files must not contain tabs');
+            } catch (\Exception $e) {
+                $this->assertInstanceOf('\Exception', $e, 'YAML files must not contain tabs');
+                $this->assertEquals('A YAML file cannot contain tabs as indentation at line 2 (near "'.strpbrk($yaml, "\t").'").', $e->getMessage(), 'YAML files must not contain tabs');
+            }
+        }
+    }
+
+    public function testEndOfTheDocumentMarker()
+    {
+        $yaml = <<<'EOF'
+--- %YAML:1.0
+foo
+...
+EOF;
+
+        $this->assertEquals('foo', $this->parser->parse($yaml));
+    }
+
+    public function getBlockChompingTests()
+    {
+        $tests = array();
+
+        $yaml = <<<'EOF'
+foo: |-
+    one
+    two
+bar: |-
+    one
+    two
+
+EOF;
+        $expected = array(
+            'foo' => "one\ntwo",
+            'bar' => "one\ntwo",
+        );
+        $tests['Literal block chomping strip with single trailing newline'] = array($expected, $yaml);
+
+        $yaml = <<<'EOF'
+foo: |-
+    one
+    two
+
+bar: |-
+    one
+    two
+
+
+EOF;
+        $expected = array(
+            'foo' => "one\ntwo",
+            'bar' => "one\ntwo",
+        );
+        $tests['Literal block chomping strip with multiple trailing newlines'] = array($expected, $yaml);
+
+        $yaml = <<<'EOF'
+{}
+
+
+EOF;
+        $expected = array();
+        $tests['Literal block chomping strip with multiple trailing newlines after a 1-liner'] = array($expected, $yaml);
+
+        $yaml = <<<'EOF'
+foo: |-
+    one
+    two
+bar: |-
+    one
+    two
+EOF;
+        $expected = array(
+            'foo' => "one\ntwo",
+            'bar' => "one\ntwo",
+        );
+        $tests['Literal block chomping strip without trailing newline'] = array($expected, $yaml);
+
+        $yaml = <<<'EOF'
+foo: |
+    one
+    two
+bar: |
+    one
+    two
+
+EOF;
+        $expected = array(
+            'foo' => "one\ntwo\n",
+            'bar' => "one\ntwo\n",
+        );
+        $tests['Literal block chomping clip with single trailing newline'] = array($expected, $yaml);
+
+        $yaml = <<<'EOF'
+foo: |
+    one
+    two
+
+bar: |
+    one
+    two
+
+
+EOF;
+        $expected = array(
+            'foo' => "one\ntwo\n",
+            'bar' => "one\ntwo\n",
+        );
+        $tests['Literal block chomping clip with multiple trailing newlines'] = array($expected, $yaml);
+
+        $yaml = <<<'EOF'
+foo:
+- bar: |
+    one
+
+    two
+EOF;
+        $expected = array(
+            'foo' => array(
+                array(
+                    'bar' => "one\n\ntwo",
+                ),
+            ),
+        );
+        $tests['Literal block chomping clip with embedded blank line inside unindented collection'] = array($expected, $yaml);
+
+        $yaml = <<<'EOF'
+foo: |
+    one
+    two
+bar: |
+    one
+    two
+EOF;
+        $expected = array(
+            'foo' => "one\ntwo\n",
+            'bar' => "one\ntwo",
+        );
+        $tests['Literal block chomping clip without trailing newline'] = array($expected, $yaml);
+
+        $yaml = <<<'EOF'
+foo: |+
+    one
+    two
+bar: |+
+    one
+    two
+
+EOF;
+        $expected = array(
+            'foo' => "one\ntwo\n",
+            'bar' => "one\ntwo\n",
+        );
+        $tests['Literal block chomping keep with single trailing newline'] = array($expected, $yaml);
+
+        $yaml = <<<'EOF'
+foo: |+
+    one
+    two
+
+bar: |+
+    one
+    two
+
+
+EOF;
+        $expected = array(
+            'foo' => "one\ntwo\n\n",
+            'bar' => "one\ntwo\n\n",
+        );
+        $tests['Literal block chomping keep with multiple trailing newlines'] = array($expected, $yaml);
+
+        $yaml = <<<'EOF'
+foo: |+
+    one
+    two
+bar: |+
+    one
+    two
+EOF;
+        $expected = array(
+            'foo' => "one\ntwo\n",
+            'bar' => "one\ntwo",
+        );
+        $tests['Literal block chomping keep without trailing newline'] = array($expected, $yaml);
+
+        $yaml = <<<'EOF'
+foo: >-
+    one
+    two
+bar: >-
+    one
+    two
+
+EOF;
+        $expected = array(
+            'foo' => 'one two',
+            'bar' => 'one two',
+        );
+        $tests['Folded block chomping strip with single trailing newline'] = array($expected, $yaml);
+
+        $yaml = <<<'EOF'
+foo: >-
+    one
+    two
+
+bar: >-
+    one
+    two
+
+
+EOF;
+        $expected = array(
+            'foo' => 'one two',
+            'bar' => 'one two',
+        );
+        $tests['Folded block chomping strip with multiple trailing newlines'] = array($expected, $yaml);
+
+        $yaml = <<<'EOF'
+foo: >-
+    one
+    two
+bar: >-
+    one
+    two
+EOF;
+        $expected = array(
+            'foo' => 'one two',
+            'bar' => 'one two',
+        );
+        $tests['Folded block chomping strip without trailing newline'] = array($expected, $yaml);
+
+        $yaml = <<<'EOF'
+foo: >
+    one
+    two
+bar: >
+    one
+    two
+
+EOF;
+        $expected = array(
+            'foo' => "one two\n",
+            'bar' => "one two\n",
+        );
+        $tests['Folded block chomping clip with single trailing newline'] = array($expected, $yaml);
+
+        $yaml = <<<'EOF'
+foo: >
+    one
+    two
+
+bar: >
+    one
+    two
+
+
+EOF;
+        $expected = array(
+            'foo' => "one two\n",
+            'bar' => "one two\n",
+        );
+        $tests['Folded block chomping clip with multiple trailing newlines'] = array($expected, $yaml);
+
+        $yaml = <<<'EOF'
+foo: >
+    one
+    two
+bar: >
+    one
+    two
+EOF;
+        $expected = array(
+            'foo' => "one two\n",
+            'bar' => 'one two',
+        );
+        $tests['Folded block chomping clip without trailing newline'] = array($expected, $yaml);
+
+        $yaml = <<<'EOF'
+foo: >+
+    one
+    two
+bar: >+
+    one
+    two
+
+EOF;
+        $expected = array(
+            'foo' => "one two\n",
+            'bar' => "one two\n",
+        );
+        $tests['Folded block chomping keep with single trailing newline'] = array($expected, $yaml);
+
+        $yaml = <<<'EOF'
+foo: >+
+    one
+    two
+
+bar: >+
+    one
+    two
+
+
+EOF;
+        $expected = array(
+            'foo' => "one two\n\n",
+            'bar' => "one two\n\n",
+        );
+        $tests['Folded block chomping keep with multiple trailing newlines'] = array($expected, $yaml);
+
+        $yaml = <<<'EOF'
+foo: >+
+    one
+    two
+bar: >+
+    one
+    two
+EOF;
+        $expected = array(
+            'foo' => "one two\n",
+            'bar' => 'one two',
+        );
+        $tests['Folded block chomping keep without trailing newline'] = array($expected, $yaml);
+
+        return $tests;
+    }
+
+    /**
+     * @dataProvider getBlockChompingTests
+     */
+    public function testBlockChomping($expected, $yaml)
+    {
+        $this->assertSame($expected, $this->parser->parse($yaml));
+    }
+
+    /**
+     * Regression test for issue #7989.
+     *
+     * @see https://github.com/symfony/symfony/issues/7989
+     */
+    public function testBlockLiteralWithLeadingNewlines()
+    {
+        $yaml = <<<'EOF'
+foo: |-
+
+
+    bar
+
+EOF;
+        $expected = array(
+            'foo' => "\n\nbar",
+        );
+
+        $this->assertSame($expected, $this->parser->parse($yaml));
+    }
+
+    public function testObjectSupportEnabled()
+    {
+        $input = <<<'EOF'
+foo: !php/object O:30:"Symfony\Component\Yaml\Tests\B":1:{s:1:"b";s:3:"foo";}
+bar: 1
+EOF;
+        $this->assertEquals(array('foo' => new B(), 'bar' => 1), $this->parser->parse($input, Yaml::PARSE_OBJECT), '->parse() is able to parse objects');
+    }
+
+    public function testObjectSupportDisabledButNoExceptions()
+    {
+        $input = <<<'EOF'
+foo: !php/object O:30:"Symfony\Tests\Component\Yaml\B":1:{s:1:"b";s:3:"foo";}
+bar: 1
+EOF;
+        $this->assertEquals(array('foo' => null, 'bar' => 1), $this->parser->parse($input), '->parse() does not parse objects');
+    }
+
+    /**
+     * @dataProvider getObjectForMapTests
+     */
+    public function testObjectForMap($yaml, $expected)
+    {
+        $flags = Yaml::PARSE_OBJECT_FOR_MAP;
+
+        $this->assertEquals($expected, $this->parser->parse($yaml, $flags));
+    }
+
+    public function getObjectForMapTests()
+    {
+        $tests = array();
+
+        $yaml = <<<'EOF'
+foo:
+    fiz: [cat]
+EOF;
+        $expected = new \stdClass();
+        $expected->foo = new \stdClass();
+        $expected->foo->fiz = array('cat');
+        $tests['mapping'] = array($yaml, $expected);
+
+        $yaml = '{ "foo": "bar", "fiz": "cat" }';
+        $expected = new \stdClass();
+        $expected->foo = 'bar';
+        $expected->fiz = 'cat';
+        $tests['inline-mapping'] = array($yaml, $expected);
+
+        $yaml = "foo: bar\nbaz: foobar";
+        $expected = new \stdClass();
+        $expected->foo = 'bar';
+        $expected->baz = 'foobar';
+        $tests['object-for-map-is-applied-after-parsing'] = array($yaml, $expected);
+
+        $yaml = <<<'EOT'
+array:
+  - key: one
+  - key: two
+EOT;
+        $expected = new \stdClass();
+        $expected->array = array();
+        $expected->array[0] = new \stdClass();
+        $expected->array[0]->key = 'one';
+        $expected->array[1] = new \stdClass();
+        $expected->array[1]->key = 'two';
+        $tests['nest-map-and-sequence'] = array($yaml, $expected);
+
+        $yaml = <<<'YAML'
+map:
+  1: one
+  2: two
+YAML;
+        $expected = new \stdClass();
+        $expected->map = new \stdClass();
+        $expected->map->{1} = 'one';
+        $expected->map->{2} = 'two';
+        $tests['numeric-keys'] = array($yaml, $expected);
+
+        $yaml = <<<'YAML'
+map:
+  '0': one
+  '1': two
+YAML;
+        $expected = new \stdClass();
+        $expected->map = new \stdClass();
+        $expected->map->{0} = 'one';
+        $expected->map->{1} = 'two';
+        $tests['zero-indexed-numeric-keys'] = array($yaml, $expected);
+
+        return $tests;
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     */
+    public function testObjectsSupportDisabledWithExceptions()
+    {
+        $yaml = <<<'EOF'
+foo: !php/object:O:30:"Symfony\Tests\Component\Yaml\B":1:{s:1:"b";s:3:"foo";}
+bar: 1
+EOF;
+
+        $this->parser->parse($yaml, Yaml::PARSE_EXCEPTION_ON_INVALID_TYPE);
+    }
+
+    public function testCanParseContentWithTrailingSpaces()
+    {
+        $yaml = "items:  \n  foo: bar";
+
+        $expected = array(
+            'items' => array('foo' => 'bar'),
+        );
+
+        $this->assertSame($expected, $this->parser->parse($yaml));
+    }
+
+    /**
+     * @requires extension iconv
+     */
+    public function testNonUtf8Exception()
+    {
+        $yamls = array(
+            iconv('UTF-8', 'ISO-8859-1', "foo: 'äöüß'"),
+            iconv('UTF-8', 'ISO-8859-15', "euro: '€'"),
+            iconv('UTF-8', 'CP1252', "cp1252: '©ÉÇáñ'"),
+        );
+
+        foreach ($yamls as $yaml) {
+            try {
+                $this->parser->parse($yaml);
+
+                $this->fail('charsets other than UTF-8 are rejected.');
+            } catch (\Exception $e) {
+                $this->assertInstanceOf('Symfony\Component\Yaml\Exception\ParseException', $e, 'charsets other than UTF-8 are rejected.');
+            }
+        }
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     */
+    public function testUnindentedCollectionException()
+    {
+        $yaml = <<<'EOF'
+
+collection:
+-item1
+-item2
+-item3
+
+EOF;
+
+        $this->parser->parse($yaml);
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     */
+    public function testShortcutKeyUnindentedCollectionException()
+    {
+        $yaml = <<<'EOF'
+
+collection:
+-  key: foo
+  foo: bar
+
+EOF;
+
+        $this->parser->parse($yaml);
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessageRegExp /^Multiple documents are not supported.+/
+     */
+    public function testMultipleDocumentsNotSupportedException()
+    {
+        Yaml::parse(<<<'EOL'
+# Ranking of 1998 home runs
+---
+- Mark McGwire
+- Sammy Sosa
+- Ken Griffey
+
+# Team ranking
+---
+- Chicago Cubs
+- St Louis Cardinals
+EOL
+        );
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     */
+    public function testSequenceInAMapping()
+    {
+        Yaml::parse(<<<'EOF'
+yaml:
+  hash: me
+  - array stuff
+EOF
+        );
+    }
+
+    public function testSequenceInMappingStartedBySingleDashLine()
+    {
+        $yaml = <<<'EOT'
+a:
+-
+  b:
+  -
+    bar: baz
+- foo
+d: e
+EOT;
+        $expected = array(
+            'a' => array(
+                array(
+                    'b' => array(
+                        array(
+                            'bar' => 'baz',
+                        ),
+                    ),
+                ),
+                'foo',
+            ),
+            'd' => 'e',
+        );
+
+        $this->assertSame($expected, $this->parser->parse($yaml));
+    }
+
+    public function testSequenceFollowedByCommentEmbeddedInMapping()
+    {
+        $yaml = <<<'EOT'
+a:
+    b:
+        - c
+# comment
+    d: e
+EOT;
+        $expected = array(
+            'a' => array(
+                'b' => array('c'),
+                'd' => 'e',
+            ),
+        );
+
+        $this->assertSame($expected, $this->parser->parse($yaml));
+    }
+
+    public function testNonStringFollowedByCommentEmbeddedInMapping()
+    {
+        $yaml = <<<'EOT'
+a:
+    b:
+        {}
+# comment
+    d:
+        1.1
+# another comment
+EOT;
+        $expected = array(
+            'a' => array(
+                'b' => array(),
+                'd' => 1.1,
+            ),
+        );
+
+        $this->assertSame($expected, $this->parser->parse($yaml));
+    }
+
+    public function getParseExceptionNotAffectedMultiLineStringLastResortParsing()
+    {
+        $tests = array();
+
+        $yaml = <<<'EOT'
+a
+    b:
+EOT;
+        $tests['parse error on first line'] = array($yaml);
+
+        $yaml = <<<'EOT'
+a
+
+b
+    c:
+EOT;
+        $tests['parse error due to inconsistent indentation'] = array($yaml);
+
+        $yaml = <<<'EOT'
+ &  *  !  |  >  '  "  %  @  ` #, { asd a;sdasd }-@^qw3
+EOT;
+        $tests['symfony/symfony/issues/22967#issuecomment-322067742'] = array($yaml);
+
+        return $tests;
+    }
+
+    /**
+     * @dataProvider getParseExceptionNotAffectedMultiLineStringLastResortParsing
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     */
+    public function testParseExceptionNotAffectedByMultiLineStringLastResortParsing($yaml)
+    {
+        $this->parser->parse($yaml);
+    }
+
+    public function testMultiLineStringLastResortParsing()
+    {
+        $yaml = <<<'EOT'
+test:
+  You can have things that don't look like strings here
+  true
+  yes you can
+EOT;
+        $expected = array(
+            'test' => 'You can have things that don\'t look like strings here true yes you can',
+        );
+
+        $this->assertSame($expected, $this->parser->parse($yaml));
+
+        $yaml = <<<'EOT'
+a:
+    b
+       c
+EOT;
+        $expected = array(
+            'a' => 'b c',
+        );
+
+        $this->assertSame($expected, $this->parser->parse($yaml));
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     */
+    public function testMappingInASequence()
+    {
+        Yaml::parse(<<<'EOF'
+yaml:
+  - array stuff
+  hash: me
+EOF
+        );
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessage missing colon
+     */
+    public function testScalarInSequence()
+    {
+        Yaml::parse(<<<'EOF'
+foo:
+    - bar
+"missing colon"
+    foo: bar
+EOF
+        );
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessage Duplicate key "child" detected
+     *
+     * > It is an error for two equal keys to appear in the same mapping node.
+     * > In such a case the YAML processor may continue, ignoring the second
+     * > `key: value` pair and issuing an appropriate warning. This strategy
+     * > preserves a consistent information model for one-pass and random access
+     * > applications.
+     *
+     * @see http://yaml.org/spec/1.2/spec.html#id2759572
+     * @see http://yaml.org/spec/1.1/#id932806
+     */
+    public function testMappingDuplicateKeyBlock()
+    {
+        $input = <<<'EOD'
+parent:
+    child: first
+    child: duplicate
+parent:
+    child: duplicate
+    child: duplicate
+EOD;
+        $expected = array(
+            'parent' => array(
+                'child' => 'first',
+            ),
+        );
+        $this->assertSame($expected, Yaml::parse($input));
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessage Duplicate key "child" detected
+     */
+    public function testMappingDuplicateKeyFlow()
+    {
+        $input = <<<'EOD'
+parent: { child: first, child: duplicate }
+parent: { child: duplicate, child: duplicate }
+EOD;
+        $expected = array(
+            'parent' => array(
+                'child' => 'first',
+            ),
+        );
+        $this->assertSame($expected, Yaml::parse($input));
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     * @dataProvider getParseExceptionOnDuplicateData
+     */
+    public function testParseExceptionOnDuplicate($input, $duplicateKey, $lineNumber)
+    {
+        $this->expectExceptionMessage(sprintf('Duplicate key "%s" detected at line %d', $duplicateKey, $lineNumber));
+
+        Yaml::parse($input);
+    }
+
+    public function getParseExceptionOnDuplicateData()
+    {
+        $tests = array();
+
+        $yaml = <<<EOD
+parent: { child: first, child: duplicate }
+EOD;
+        $tests[] = array($yaml, 'child', 1);
+
+        $yaml = <<<EOD
+parent:
+  child: first,
+  child: duplicate
+EOD;
+        $tests[] = array($yaml, 'child', 3);
+
+        $yaml = <<<EOD
+parent: { child: foo }
+parent: { child: bar }
+EOD;
+        $tests[] = array($yaml, 'parent', 2);
+
+        $yaml = <<<EOD
+parent: { child_mapping: { value: bar},  child_mapping: { value: bar} }
+EOD;
+        $tests[] = array($yaml, 'child_mapping', 1);
+
+        $yaml = <<<EOD
+parent:
+  child_mapping:
+    value: bar
+  child_mapping:
+    value: bar
+EOD;
+        $tests[] = array($yaml, 'child_mapping', 4);
+
+        $yaml = <<<EOD
+parent: { child_sequence: ['key1', 'key2', 'key3'],  child_sequence: ['key1', 'key2', 'key3'] }
+EOD;
+        $tests[] = array($yaml, 'child_sequence', 1);
+
+        $yaml = <<<EOD
+parent:
+  child_sequence:
+    - key1
+    - key2
+    - key3
+  child_sequence:
+    - key1
+    - key2
+    - key3
+EOD;
+        $tests[] = array($yaml, 'child_sequence', 6);
+
+        return $tests;
+    }
+
+    public function testEmptyValue()
+    {
+        $input = <<<'EOF'
+hash:
+EOF;
+
+        $this->assertEquals(array('hash' => null), Yaml::parse($input));
+    }
+
+    public function testCommentAtTheRootIndent()
+    {
+        $this->assertEquals(array(
+            'services' => array(
+                'app.foo_service' => array(
+                    'class' => 'Foo',
+                ),
+                'app/bar_service' => array(
+                    'class' => 'Bar',
+                ),
+            ),
+        ), Yaml::parse(<<<'EOF'
+# comment 1
+services:
+# comment 2
+    # comment 3
+    app.foo_service:
+        class: Foo
+# comment 4
+    # comment 5
+    app/bar_service:
+        class: Bar
+EOF
+        ));
+    }
+
+    public function testStringBlockWithComments()
+    {
+        $this->assertEquals(array('content' => <<<'EOT'
+# comment 1
+header
+
+    # comment 2
+    <body>
+        <h1>title</h1>
+    </body>
+
+footer # comment3
+EOT
+        ), Yaml::parse(<<<'EOF'
+content: |
+    # comment 1
+    header
+
+        # comment 2
+        <body>
+            <h1>title</h1>
+        </body>
+
+    footer # comment3
+EOF
+        ));
+    }
+
+    public function testFoldedStringBlockWithComments()
+    {
+        $this->assertEquals(array(array('content' => <<<'EOT'
+# comment 1
+header
+
+    # comment 2
+    <body>
+        <h1>title</h1>
+    </body>
+
+footer # comment3
+EOT
+        )), Yaml::parse(<<<'EOF'
+-
+    content: |
+        # comment 1
+        header
+
+            # comment 2
+            <body>
+                <h1>title</h1>
+            </body>
+
+        footer # comment3
+EOF
+        ));
+    }
+
+    public function testNestedFoldedStringBlockWithComments()
+    {
+        $this->assertEquals(array(array(
+            'title' => 'some title',
+            'content' => <<<'EOT'
+# comment 1
+header
+
+    # comment 2
+    <body>
+        <h1>title</h1>
+    </body>
+
+footer # comment3
+EOT
+        )), Yaml::parse(<<<'EOF'
+-
+    title: some title
+    content: |
+        # comment 1
+        header
+
+            # comment 2
+            <body>
+                <h1>title</h1>
+            </body>
+
+        footer # comment3
+EOF
+        ));
+    }
+
+    public function testReferenceResolvingInInlineStrings()
+    {
+        $this->assertEquals(array(
+            'var' => 'var-value',
+            'scalar' => 'var-value',
+            'list' => array('var-value'),
+            'list_in_list' => array(array('var-value')),
+            'map_in_list' => array(array('key' => 'var-value')),
+            'embedded_mapping' => array(array('key' => 'var-value')),
+            'map' => array('key' => 'var-value'),
+            'list_in_map' => array('key' => array('var-value')),
+            'map_in_map' => array('foo' => array('bar' => 'var-value')),
+        ), Yaml::parse(<<<'EOF'
+var:  &var var-value
+scalar: *var
+list: [ *var ]
+list_in_list: [[ *var ]]
+map_in_list: [ { key: *var } ]
+embedded_mapping: [ key: *var ]
+map: { key: *var }
+list_in_map: { key: [*var] }
+map_in_map: { foo: { bar: *var } }
+EOF
+        ));
+    }
+
+    public function testYamlDirective()
+    {
+        $yaml = <<<'EOF'
+%YAML 1.2
+---
+foo: 1
+bar: 2
+EOF;
+        $this->assertEquals(array('foo' => 1, 'bar' => 2), $this->parser->parse($yaml));
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessage Numeric keys are not supported. Quote your evaluable mapping keys instead
+     */
+    public function testFloatKeys()
+    {
+        $yaml = <<<'EOF'
+foo:
+    1.2: "bar"
+    1.3: "baz"
+EOF;
+
+        $this->parser->parse($yaml);
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessage Non-string keys are not supported. Quote your evaluable mapping keys instead
+     */
+    public function testBooleanKeys()
+    {
+        $yaml = <<<'EOF'
+true: foo
+false: bar
+EOF;
+
+        $this->parser->parse($yaml);
+    }
+
+    public function testExplicitStringCasting()
+    {
+        $yaml = <<<'EOF'
+'1.2': "bar"
+!!str 1.3: "baz"
+
+'true': foo
+!!str false: bar
+
+!!str null: 'null'
+'~': 'null'
+EOF;
+
+        $expected = array(
+            '1.2' => 'bar',
+            '1.3' => 'baz',
+            'true' => 'foo',
+            'false' => 'bar',
+            'null' => 'null',
+            '~' => 'null',
+        );
+
+        $this->assertEquals($expected, $this->parser->parse($yaml));
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessage A colon cannot be used in an unquoted mapping value
+     */
+    public function testColonInMappingValueException()
+    {
+        $yaml = <<<'EOF'
+foo: bar: baz
+EOF;
+
+        $this->parser->parse($yaml);
+    }
+
+    public function testColonInMappingValueExceptionNotTriggeredByColonInComment()
+    {
+        $yaml = <<<'EOT'
+foo:
+    bar: foobar # Note: a comment after a colon
+EOT;
+
+        $this->assertSame(array('foo' => array('bar' => 'foobar')), $this->parser->parse($yaml));
+    }
+
+    /**
+     * @dataProvider getCommentLikeStringInScalarBlockData
+     */
+    public function testCommentLikeStringsAreNotStrippedInBlockScalars($yaml, $expectedParserResult)
+    {
+        $this->assertSame($expectedParserResult, $this->parser->parse($yaml));
+    }
+
+    public function getCommentLikeStringInScalarBlockData()
+    {
+        $tests = array();
+
+        $yaml = <<<'EOT'
+pages:
+    -
+        title: some title
+        content: |
+            # comment 1
+            header
+
+                # comment 2
+                <body>
+                    <h1>title</h1>
+                </body>
+
+            footer # comment3
+EOT;
+        $expected = array(
+            'pages' => array(
+                array(
+                    'title' => 'some title',
+                    'content' => <<<'EOT'
+# comment 1
+header
+
+    # comment 2
+    <body>
+        <h1>title</h1>
+    </body>
+
+footer # comment3
+EOT
+                    ,
+                ),
+            ),
+        );
+        $tests[] = array($yaml, $expected);
+
+        $yaml = <<<'EOT'
+test: |
+    foo
+    # bar
+    baz
+collection:
+    - one: |
+        foo
+        # bar
+        baz
+    - two: |
+        foo
+        # bar
+        baz
+EOT;
+        $expected = array(
+            'test' => <<<'EOT'
+foo
+# bar
+baz
+
+EOT
+            ,
+            'collection' => array(
+                array(
+                    'one' => <<<'EOT'
+foo
+# bar
+baz
+
+EOT
+                    ,
+                ),
+                array(
+                    'two' => <<<'EOT'
+foo
+# bar
+baz
+EOT
+                    ,
+                ),
+            ),
+        );
+        $tests[] = array($yaml, $expected);
+
+        $yaml = <<<'EOT'
+foo:
+  bar:
+    scalar-block: >
+      line1
+      line2>
+  baz:
+# comment
+    foobar: ~
+EOT;
+        $expected = array(
+            'foo' => array(
+                'bar' => array(
+                    'scalar-block' => "line1 line2>\n",
+                ),
+                'baz' => array(
+                    'foobar' => null,
+                ),
+            ),
+        );
+        $tests[] = array($yaml, $expected);
+
+        $yaml = <<<'EOT'
+a:
+    b: hello
+#    c: |
+#        first row
+#        second row
+    d: hello
+EOT;
+        $expected = array(
+            'a' => array(
+                'b' => 'hello',
+                'd' => 'hello',
+            ),
+        );
+        $tests[] = array($yaml, $expected);
+
+        return $tests;
+    }
+
+    public function testBlankLinesAreParsedAsNewLinesInFoldedBlocks()
+    {
+        $yaml = <<<'EOT'
+test: >
+    <h2>A heading</h2>
+
+    <ul>
+    <li>a list</li>
+    <li>may be a good example</li>
+    </ul>
+EOT;
+
+        $this->assertSame(
+            array(
+                'test' => <<<'EOT'
+<h2>A heading</h2>
+<ul> <li>a list</li> <li>may be a good example</li> </ul>
+EOT
+                ,
+            ),
+            $this->parser->parse($yaml)
+        );
+    }
+
+    public function testAdditionallyIndentedLinesAreParsedAsNewLinesInFoldedBlocks()
+    {
+        $yaml = <<<'EOT'
+test: >
+    <h2>A heading</h2>
+
+    <ul>
+      <li>a list</li>
+      <li>may be a good example</li>
+    </ul>
+EOT;
+
+        $this->assertSame(
+            array(
+                'test' => <<<'EOT'
+<h2>A heading</h2>
+<ul>
+  <li>a list</li>
+  <li>may be a good example</li>
+</ul>
+EOT
+                ,
+            ),
+            $this->parser->parse($yaml)
+        );
+    }
+
+    /**
+     * @dataProvider getBinaryData
+     */
+    public function testParseBinaryData($data)
+    {
+        $this->assertSame(array('data' => 'Hello world'), $this->parser->parse($data));
+    }
+
+    public function getBinaryData()
+    {
+        return array(
+            'enclosed with double quotes' => array('data: !!binary "SGVsbG8gd29ybGQ="'),
+            'enclosed with single quotes' => array("data: !!binary 'SGVsbG8gd29ybGQ='"),
+            'containing spaces' => array('data: !!binary  "SGVs bG8gd 29ybGQ="'),
+            'in block scalar' => array(
+                <<<'EOT'
+data: !!binary |
+    SGVsbG8gd29ybGQ=
+EOT
+    ),
+            'containing spaces in block scalar' => array(
+                <<<'EOT'
+data: !!binary |
+    SGVs bG8gd 29ybGQ=
+EOT
+    ),
+        );
+    }
+
+    /**
+     * @dataProvider getInvalidBinaryData
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     */
+    public function testParseInvalidBinaryData($data, $expectedMessage)
+    {
+        if (method_exists($this, 'expectException')) {
+            $this->expectExceptionMessageRegExp($expectedMessage);
+        } else {
+            $this->setExpectedExceptionRegExp(ParseException::class, $expectedMessage);
+        }
+
+        $this->parser->parse($data);
+    }
+
+    public function getInvalidBinaryData()
+    {
+        return array(
+            'length not a multiple of four' => array('data: !!binary "SGVsbG8d29ybGQ="', '/The normalized base64 encoded data \(data without whitespace characters\) length must be a multiple of four \(\d+ bytes given\)/'),
+            'invalid characters' => array('!!binary "SGVsbG8#d29ybGQ="', '/The base64 encoded data \(.*\) contains invalid characters/'),
+            'too many equals characters' => array('data: !!binary "SGVsbG8gd29yb==="', '/The base64 encoded data \(.*\) contains invalid characters/'),
+            'misplaced equals character' => array('data: !!binary "SGVsbG8gd29ybG=Q"', '/The base64 encoded data \(.*\) contains invalid characters/'),
+            'length not a multiple of four in block scalar' => array(
+                <<<'EOT'
+data: !!binary |
+    SGVsbG8d29ybGQ=
+EOT
+                ,
+                '/The normalized base64 encoded data \(data without whitespace characters\) length must be a multiple of four \(\d+ bytes given\)/',
+            ),
+            'invalid characters in block scalar' => array(
+                <<<'EOT'
+data: !!binary |
+    SGVsbG8#d29ybGQ=
+EOT
+                ,
+                '/The base64 encoded data \(.*\) contains invalid characters/',
+            ),
+            'too many equals characters in block scalar' => array(
+                <<<'EOT'
+data: !!binary |
+    SGVsbG8gd29yb===
+EOT
+                ,
+                '/The base64 encoded data \(.*\) contains invalid characters/',
+            ),
+            'misplaced equals character in block scalar' => array(
+                <<<'EOT'
+data: !!binary |
+    SGVsbG8gd29ybG=Q
+EOT
+                ,
+                '/The base64 encoded data \(.*\) contains invalid characters/',
+            ),
+        );
+    }
+
+    public function testParseDateAsMappingValue()
+    {
+        $yaml = <<<'EOT'
+date: 2002-12-14
+EOT;
+        $expectedDate = new \DateTime();
+        $expectedDate->setTimeZone(new \DateTimeZone('UTC'));
+        $expectedDate->setDate(2002, 12, 14);
+        $expectedDate->setTime(0, 0, 0);
+
+        $this->assertEquals(array('date' => $expectedDate), $this->parser->parse($yaml, Yaml::PARSE_DATETIME));
+    }
+
+    /**
+     * @param $lineNumber
+     * @param $yaml
+     * @dataProvider parserThrowsExceptionWithCorrectLineNumberProvider
+     */
+    public function testParserThrowsExceptionWithCorrectLineNumber($lineNumber, $yaml)
+    {
+        if (method_exists($this, 'expectException')) {
+            $this->expectException('\Symfony\Component\Yaml\Exception\ParseException');
+            $this->expectExceptionMessage(sprintf('Unexpected characters near "," at line %d (near "bar: "123",").', $lineNumber));
+        } else {
+            $this->setExpectedException('\Symfony\Component\Yaml\Exception\ParseException', sprintf('Unexpected characters near "," at line %d (near "bar: "123",").', $lineNumber));
+        }
+
+        $this->parser->parse($yaml);
+    }
+
+    public function parserThrowsExceptionWithCorrectLineNumberProvider()
+    {
+        return array(
+            array(
+                4,
+                <<<'YAML'
+foo:
+    -
+        # bar
+        bar: "123",
+YAML
+            ),
+            array(
+                5,
+                <<<'YAML'
+foo:
+    -
+        # bar
+        # bar
+        bar: "123",
+YAML
+            ),
+            array(
+                8,
+                <<<'YAML'
+foo:
+    -
+        # foobar
+        baz: 123
+bar:
+    -
+        # bar
+        bar: "123",
+YAML
+            ),
+            array(
+                10,
+                <<<'YAML'
+foo:
+    -
+        # foobar
+        # foobar
+        baz: 123
+bar:
+    -
+        # bar
+        # bar
+        bar: "123",
+YAML
+            ),
+        );
+    }
+
+    public function testParseMultiLineQuotedString()
+    {
+        $yaml = <<<EOT
+foo: "bar
+  baz
+   foobar
+foo"
+bar: baz
+EOT;
+
+        $this->assertSame(array('foo' => 'bar baz foobar foo', 'bar' => 'baz'), $this->parser->parse($yaml));
+    }
+
+    public function testMultiLineQuotedStringWithTrailingBackslash()
+    {
+        $yaml = <<<YAML
+foobar:
+    "foo\
+    bar"
+YAML;
+
+        $this->assertSame(array('foobar' => 'foobar'), $this->parser->parse($yaml));
+    }
+
+    public function testCommentCharactersInMultiLineQuotedStrings()
+    {
+        $yaml = <<<YAML
+foo:
+    foobar: 'foo
+      #bar'
+    bar: baz
+YAML;
+        $expected = array(
+            'foo' => array(
+                'foobar' => 'foo #bar',
+                'bar' => 'baz',
+            ),
+        );
+
+        $this->assertSame($expected, $this->parser->parse($yaml));
+    }
+
+    public function testBlankLinesInQuotedMultiLineString()
+    {
+        $yaml = <<<YAML
+foobar: 'foo
+
+    bar'
+YAML;
+        $expected = array(
+            'foobar' => "foo\nbar",
+        );
+
+        $this->assertSame($expected, $this->parser->parse($yaml));
+    }
+
+    public function testParseMultiLineUnquotedString()
+    {
+        $yaml = <<<EOT
+foo: bar
+  baz
+   foobar
+  foo
+bar: baz
+EOT;
+
+        $this->assertSame(array('foo' => 'bar baz foobar foo', 'bar' => 'baz'), $this->parser->parse($yaml));
+    }
+
+    public function testParseMultiLineString()
+    {
+        $this->assertEquals("foo bar\nbaz", $this->parser->parse("foo\nbar\n\nbaz"));
+    }
+
+    /**
+     * @dataProvider multiLineDataProvider
+     */
+    public function testParseMultiLineMappingValue($yaml, $expected, $parseError)
+    {
+        $this->assertEquals($expected, $this->parser->parse($yaml));
+    }
+
+    public function multiLineDataProvider()
+    {
+        $tests = array();
+
+        $yaml = <<<'EOF'
+foo:
+- bar:
+    one
+
+    two
+    three
+EOF;
+        $expected = array(
+            'foo' => array(
+                array(
+                    'bar' => "one\ntwo three",
+                ),
+            ),
+        );
+
+        $tests[] = array($yaml, $expected, false);
+
+        $yaml = <<<'EOF'
+bar
+"foo"
+EOF;
+        $expected = 'bar "foo"';
+
+        $tests[] = array($yaml, $expected, false);
+
+        $yaml = <<<'EOF'
+bar
+"foo
+EOF;
+        $expected = 'bar "foo';
+
+        $tests[] = array($yaml, $expected, false);
+
+        $yaml = <<<'EOF'
+bar
+
+'foo'
+EOF;
+        $expected = "bar\n'foo'";
+
+        $tests[] = array($yaml, $expected, false);
+
+        $yaml = <<<'EOF'
+bar
+
+foo'
+EOF;
+        $expected = "bar\nfoo'";
+
+        $tests[] = array($yaml, $expected, false);
+
+        return $tests;
+    }
+
+    public function testTaggedInlineMapping()
+    {
+        $this->assertEquals(new TaggedValue('foo', array('foo' => 'bar')), $this->parser->parse('!foo {foo: bar}', Yaml::PARSE_CUSTOM_TAGS));
+    }
+
+    /**
+     * @dataProvider taggedValuesProvider
+     */
+    public function testCustomTagSupport($expected, $yaml)
+    {
+        $this->assertEquals($expected, $this->parser->parse($yaml, Yaml::PARSE_CUSTOM_TAGS));
+    }
+
+    public function taggedValuesProvider()
+    {
+        return array(
+            'scalars' => array(
+                array(
+                    'foo' => new TaggedValue('inline', 'bar'),
+                    'quz' => new TaggedValue('long', 'this is a long text'),
+                ),
+                <<<YAML
+foo: !inline bar
+quz: !long >
+  this is a long
+  text
+YAML
+            ),
+            'sequences' => array(
+                array(new TaggedValue('foo', array('yaml')), new TaggedValue('quz', array('bar'))),
+                <<<YAML
+- !foo
+    - yaml
+- !quz [bar]
+YAML
+            ),
+            'mappings' => array(
+                new TaggedValue('foo', array('foo' => new TaggedValue('quz', array('bar')), 'quz' => new TaggedValue('foo', array('quz' => 'bar')))),
+                <<<YAML
+!foo
+foo: !quz [bar]
+quz: !foo
+   quz: bar
+YAML
+            ),
+            'inline' => array(
+                array(new TaggedValue('foo', array('foo', 'bar')), new TaggedValue('quz', array('foo' => 'bar', 'quz' => new TaggedValue('bar', array('one' => 'bar'))))),
+                <<<YAML
+- !foo [foo, bar]
+- !quz {foo: bar, quz: !bar {one: bar}}
+YAML
+            ),
+            'spaces-around-tag-value-in-sequence' => array(
+                array(new TaggedValue('foo', 'bar')),
+                '[ !foo bar ]',
+            ),
+        );
+    }
+
+    public function testNonSpecificTagSupport()
+    {
+        $this->assertSame('12', $this->parser->parse('! 12'));
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessage Tags support is not enabled. Enable the `Yaml::PARSE_CUSTOM_TAGS` flag to use "!iterator" at line 1 (near "!iterator [foo]").
+     */
+    public function testCustomTagsDisabled()
+    {
+        $this->parser->parse('!iterator [foo]');
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessage Tags support is not enabled. Enable the `Yaml::PARSE_CUSTOM_TAGS` flag to use "!iterator" at line 1 (near "!iterator foo").
+     */
+    public function testUnsupportedTagWithScalar()
+    {
+        $this->parser->parse('!iterator foo');
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessage The string "!!iterator foo" could not be parsed as it uses an unsupported built-in tag at line 1 (near "!!iterator foo").
+     */
+    public function testUnsupportedBuiltInTagWithScalar()
+    {
+        $this->parser->parse('!!iterator foo');
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessage The built-in tag "!!foo" is not implemented at line 1 (near "!!foo").
+     */
+    public function testExceptionWhenUsingUnsuportedBuiltInTags()
+    {
+        $this->parser->parse('!!foo');
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessage Complex mappings are not supported at line 1 (near "? "1"").
+     */
+    public function testComplexMappingThrowsParseException()
+    {
+        $yaml = <<<YAML
+? "1"
+:
+  name: végétalien
+YAML;
+
+        $this->parser->parse($yaml);
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessage Complex mappings are not supported at line 2 (near "? "1"").
+     */
+    public function testComplexMappingNestedInMappingThrowsParseException()
+    {
+        $yaml = <<<YAML
+diet:
+  ? "1"
+  :
+    name: végétalien
+YAML;
+
+        $this->parser->parse($yaml);
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessage Complex mappings are not supported at line 1 (near "- ? "1"").
+     */
+    public function testComplexMappingNestedInSequenceThrowsParseException()
+    {
+        $yaml = <<<YAML
+- ? "1"
+  :
+    name: végétalien
+YAML;
+
+        $this->parser->parse($yaml);
+    }
+
+    /**
+     * @expectedException        \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessage Unable to parse at line 1 (near "[parameters]").
+     */
+    public function testParsingIniThrowsException()
+    {
+        $ini = <<<INI
+[parameters]
+  foo = bar
+  bar = %foo%
+INI;
+
+        $this->parser->parse($ini);
+    }
+
+    private function loadTestsFromFixtureFiles($testsFile)
+    {
+        $parser = new Parser();
+
+        $tests = array();
+        $files = $parser->parseFile(__DIR__.'/Fixtures/'.$testsFile);
+        foreach ($files as $file) {
+            $yamls = file_get_contents(__DIR__.'/Fixtures/'.$file.'.yml');
+
+            // split YAMLs documents
+            foreach (preg_split('/^---( %YAML\:1\.0)?/m', $yamls) as $yaml) {
+                if (!$yaml) {
+                    continue;
+                }
+
+                $test = $parser->parse($yaml);
+                if (isset($test['todo']) && $test['todo']) {
+                    // TODO
+                } else {
+                    eval('$expected = '.trim($test['php']).';');
+
+                    $tests[] = array(var_export($expected, true), $test['yaml'], $test['test']);
+                }
+            }
+        }
+
+        return $tests;
+    }
+
+    public function testCanParseVeryLongValue()
+    {
+        $longStringWithSpaces = str_repeat('xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ', 20000);
+        $trickyVal = array('x' => $longStringWithSpaces);
+
+        $yamlString = Yaml::dump($trickyVal);
+        $arrayFromYaml = $this->parser->parse($yamlString);
+
+        $this->assertEquals($trickyVal, $arrayFromYaml);
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessage Reference "foo" does not exist at line 2
+     */
+    public function testParserCleansUpReferencesBetweenRuns()
+    {
+        $yaml = <<<YAML
+foo: &foo
+    baz: foobar
+bar:
+    <<: *foo
+YAML;
+        $this->parser->parse($yaml);
+
+        $yaml = <<<YAML
+bar:
+    <<: *foo
+YAML;
+        $this->parser->parse($yaml);
+    }
+
+    public function testPhpConstantTagMappingKey()
+    {
+        $yaml = <<<YAML
+transitions:
+    !php/const 'Symfony\Component\Yaml\Tests\B::FOO':
+        from:
+            - !php/const 'Symfony\Component\Yaml\Tests\B::BAR'
+        to: !php/const 'Symfony\Component\Yaml\Tests\B::BAZ'
+YAML;
+        $expected = array(
+            'transitions' => array(
+                'foo' => array(
+                    'from' => array(
+                        'bar',
+                    ),
+                    'to' => 'baz',
+                ),
+            ),
+        );
+
+        $this->assertSame($expected, $this->parser->parse($yaml, Yaml::PARSE_CONSTANT));
+    }
+
+    public function testMergeKeysWhenMappingsAreParsedAsObjects()
+    {
+        $yaml = <<<YAML
+foo: &FOO
+    bar: 1
+bar: &BAR
+    baz: 2
+    <<: *FOO
+baz:
+    baz_foo: 3
+    <<:
+        baz_bar: 4
+foobar:
+    bar: ~
+    <<: [*FOO, *BAR]
+YAML;
+        $expected = (object) array(
+            'foo' => (object) array(
+                'bar' => 1,
+            ),
+            'bar' => (object) array(
+                'baz' => 2,
+                'bar' => 1,
+            ),
+            'baz' => (object) array(
+                'baz_foo' => 3,
+                'baz_bar' => 4,
+            ),
+            'foobar' => (object) array(
+                'bar' => null,
+                'baz' => 2,
+            ),
+        );
+
+        $this->assertEquals($expected, $this->parser->parse($yaml, Yaml::PARSE_OBJECT_FOR_MAP));
+    }
+
+    public function testFilenamesAreParsedAsStringsWithoutFlag()
+    {
+        $file = __DIR__.'/Fixtures/index.yml';
+
+        $this->assertSame($file, $this->parser->parse($file));
+    }
+
+    public function testParseFile()
+    {
+        $this->assertInternalType('array', $this->parser->parseFile(__DIR__.'/Fixtures/index.yml'));
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessageRegExp #^File ".+/Fixtures/nonexistent.yml" does not exist\.$#
+     */
+    public function testParsingNonExistentFilesThrowsException()
+    {
+        $this->parser->parseFile(__DIR__.'/Fixtures/nonexistent.yml');
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessageRegExp #^File ".+/Fixtures/not_readable.yml" cannot be read\.$#
+     */
+    public function testParsingNotReadableFilesThrowsException()
+    {
+        if ('\\' === \DIRECTORY_SEPARATOR) {
+            $this->markTestSkipped('chmod is not supported on Windows');
+        }
+
+        $file = __DIR__.'/Fixtures/not_readable.yml';
+        chmod($file, 0200);
+
+        $this->parser->parseFile($file);
+    }
+
+    public function testParseReferencesOnMergeKeys()
+    {
+        $yaml = <<<YAML
+mergekeyrefdef:
+    a: foo
+    <<: &quux
+        b: bar
+        c: baz
+mergekeyderef:
+    d: quux
+    <<: *quux
+YAML;
+        $expected = array(
+            'mergekeyrefdef' => array(
+                'a' => 'foo',
+                'b' => 'bar',
+                'c' => 'baz',
+            ),
+            'mergekeyderef' => array(
+                'd' => 'quux',
+                'b' => 'bar',
+                'c' => 'baz',
+            ),
+        );
+
+        $this->assertSame($expected, $this->parser->parse($yaml));
+    }
+
+    public function testParseReferencesOnMergeKeysWithMappingsParsedAsObjects()
+    {
+        $yaml = <<<YAML
+mergekeyrefdef:
+    a: foo
+    <<: &quux
+        b: bar
+        c: baz
+mergekeyderef:
+    d: quux
+    <<: *quux
+YAML;
+        $expected = (object) array(
+            'mergekeyrefdef' => (object) array(
+                'a' => 'foo',
+                'b' => 'bar',
+                'c' => 'baz',
+            ),
+            'mergekeyderef' => (object) array(
+                'd' => 'quux',
+                'b' => 'bar',
+                'c' => 'baz',
+            ),
+        );
+
+        $this->assertEquals($expected, $this->parser->parse($yaml, Yaml::PARSE_OBJECT_FOR_MAP));
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessage Reference "foo" does not exist
+     */
+    public function testEvalRefException()
+    {
+        $yaml = <<<EOE
+foo: { &foo { a: Steve, <<: *foo} }
+EOE;
+        $this->parser->parse($yaml);
+    }
+
+    /**
+     * @dataProvider indentedMappingData
+     */
+    public function testParseIndentedMappings($yaml, $expected)
+    {
+        $this->assertSame($expected, $this->parser->parse($yaml));
+    }
+
+    public function indentedMappingData()
+    {
+        $tests = array();
+
+        $yaml = <<<YAML
+foo:
+  - bar: "foobar"
+    # A comment
+    baz: "foobaz"
+YAML;
+        $expected = array(
+            'foo' => array(
+                array(
+                    'bar' => 'foobar',
+                    'baz' => 'foobaz',
+                ),
+            ),
+        );
+        $tests['comment line is first line in indented block'] = array($yaml, $expected);
+
+        $yaml = <<<YAML
+foo:
+    - bar:
+        # comment
+        baz: [1, 2, 3]
+YAML;
+        $expected = array(
+            'foo' => array(
+                array(
+                    'bar' => array(
+                        'baz' => array(1, 2, 3),
+                    ),
+                ),
+            ),
+        );
+        $tests['mapping value on new line starting with a comment line'] = array($yaml, $expected);
+
+        $yaml = <<<YAML
+foo:
+  -
+    bar: foobar
+YAML;
+        $expected = array(
+            'foo' => array(
+                array(
+                    'bar' => 'foobar',
+                ),
+            ),
+        );
+        $tests['mapping in sequence starting on a new line'] = array($yaml, $expected);
+
+        $yaml = <<<YAML
+foo:
+
+    bar: baz
+YAML;
+        $expected = array(
+            'foo' => array(
+                'bar' => 'baz',
+            ),
+        );
+        $tests['blank line at the beginning of an indented mapping value'] = array($yaml, $expected);
+
+        return $tests;
+    }
+}
+
+class B
+{
+    public $b = 'foo';
+
+    const FOO = 'foo';
+    const BAR = 'bar';
+    const BAZ = 'baz';
+}
diff --git a/vendor/symfony/yaml/Tests/YamlTest.php b/vendor/symfony/yaml/Tests/YamlTest.php
new file mode 100644
index 0000000..3f6c252
--- /dev/null
+++ b/vendor/symfony/yaml/Tests/YamlTest.php
@@ -0,0 +1,44 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Yaml\Tests;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Yaml\Yaml;
+
+class YamlTest extends TestCase
+{
+    public function testParseAndDump()
+    {
+        $data = array('lorem' => 'ipsum', 'dolor' => 'sit');
+        $yml = Yaml::dump($data);
+        $parsed = Yaml::parse($yml);
+        $this->assertEquals($data, $parsed);
+    }
+
+    /**
+     * @expectedException \InvalidArgumentException
+     * @expectedExceptionMessage The indentation must be greater than zero
+     */
+    public function testZeroIndentationThrowsException()
+    {
+        Yaml::dump(array('lorem' => 'ipsum', 'dolor' => 'sit'), 2, 0);
+    }
+
+    /**
+     * @expectedException \InvalidArgumentException
+     * @expectedExceptionMessage The indentation must be greater than zero
+     */
+    public function testNegativeIndentationThrowsException()
+    {
+        Yaml::dump(array('lorem' => 'ipsum', 'dolor' => 'sit'), 2, -4);
+    }
+}
diff --git a/vendor/symfony/yaml/Unescaper.php b/vendor/symfony/yaml/Unescaper.php
new file mode 100644
index 0000000..9c3a19e
--- /dev/null
+++ b/vendor/symfony/yaml/Unescaper.php
@@ -0,0 +1,138 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Yaml;
+
+use Symfony\Component\Yaml\Exception\ParseException;
+
+/**
+ * Unescaper encapsulates unescaping rules for single and double-quoted
+ * YAML strings.
+ *
+ * @author Matthew Lewinski <matthew@lewinski.org>
+ *
+ * @internal
+ */
+class Unescaper
+{
+    /**
+     * Regex fragment that matches an escaped character in a double quoted string.
+     */
+    const REGEX_ESCAPED_CHARACTER = '\\\\(x[0-9a-fA-F]{2}|u[0-9a-fA-F]{4}|U[0-9a-fA-F]{8}|.)';
+
+    /**
+     * Unescapes a single quoted string.
+     *
+     * @param string $value A single quoted string
+     *
+     * @return string The unescaped string
+     */
+    public function unescapeSingleQuotedString(string $value): string
+    {
+        return str_replace('\'\'', '\'', $value);
+    }
+
+    /**
+     * Unescapes a double quoted string.
+     *
+     * @param string $value A double quoted string
+     *
+     * @return string The unescaped string
+     */
+    public function unescapeDoubleQuotedString(string $value): string
+    {
+        $callback = function ($match) {
+            return $this->unescapeCharacter($match[0]);
+        };
+
+        // evaluate the string
+        return preg_replace_callback('/'.self::REGEX_ESCAPED_CHARACTER.'/u', $callback, $value);
+    }
+
+    /**
+     * Unescapes a character that was found in a double-quoted string.
+     *
+     * @param string $value An escaped character
+     *
+     * @return string The unescaped character
+     */
+    private function unescapeCharacter(string $value): string
+    {
+        switch ($value[1]) {
+            case '0':
+                return "\x0";
+            case 'a':
+                return "\x7";
+            case 'b':
+                return "\x8";
+            case 't':
+                return "\t";
+            case "\t":
+                return "\t";
+            case 'n':
+                return "\n";
+            case 'v':
+                return "\xB";
+            case 'f':
+                return "\xC";
+            case 'r':
+                return "\r";
+            case 'e':
+                return "\x1B";
+            case ' ':
+                return ' ';
+            case '"':
+                return '"';
+            case '/':
+                return '/';
+            case '\\':
+                return '\\';
+            case 'N':
+                // U+0085 NEXT LINE
+                return "\xC2\x85";
+            case '_':
+                // U+00A0 NO-BREAK SPACE
+                return "\xC2\xA0";
+            case 'L':
+                // U+2028 LINE SEPARATOR
+                return "\xE2\x80\xA8";
+            case 'P':
+                // U+2029 PARAGRAPH SEPARATOR
+                return "\xE2\x80\xA9";
+            case 'x':
+                return self::utf8chr(hexdec(substr($value, 2, 2)));
+            case 'u':
+                return self::utf8chr(hexdec(substr($value, 2, 4)));
+            case 'U':
+                return self::utf8chr(hexdec(substr($value, 2, 8)));
+            default:
+                throw new ParseException(sprintf('Found unknown escape character "%s".', $value));
+        }
+    }
+
+    /**
+     * Get the UTF-8 character for the given code point.
+     */
+    private static function utf8chr(int $c): string
+    {
+        if (0x80 > $c %= 0x200000) {
+            return \chr($c);
+        }
+        if (0x800 > $c) {
+            return \chr(0xC0 | $c >> 6).\chr(0x80 | $c & 0x3F);
+        }
+        if (0x10000 > $c) {
+            return \chr(0xE0 | $c >> 12).\chr(0x80 | $c >> 6 & 0x3F).\chr(0x80 | $c & 0x3F);
+        }
+
+        return \chr(0xF0 | $c >> 18).\chr(0x80 | $c >> 12 & 0x3F).\chr(0x80 | $c >> 6 & 0x3F).\chr(0x80 | $c & 0x3F);
+    }
+}
diff --git a/vendor/symfony/yaml/Yaml.php b/vendor/symfony/yaml/Yaml.php
new file mode 100644
index 0000000..80de7e8
--- /dev/null
+++ b/vendor/symfony/yaml/Yaml.php
@@ -0,0 +1,102 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Yaml;
+
+use Symfony\Component\Yaml\Exception\ParseException;
+
+/**
+ * Yaml offers convenience methods to load and dump YAML.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @final
+ */
+class Yaml
+{
+    const DUMP_OBJECT = 1;
+    const PARSE_EXCEPTION_ON_INVALID_TYPE = 2;
+    const PARSE_OBJECT = 4;
+    const PARSE_OBJECT_FOR_MAP = 8;
+    const DUMP_EXCEPTION_ON_INVALID_TYPE = 16;
+    const PARSE_DATETIME = 32;
+    const DUMP_OBJECT_AS_MAP = 64;
+    const DUMP_MULTI_LINE_LITERAL_BLOCK = 128;
+    const PARSE_CONSTANT = 256;
+    const PARSE_CUSTOM_TAGS = 512;
+    const DUMP_EMPTY_ARRAY_AS_SEQUENCE = 1024;
+
+    /**
+     * Parses a YAML file into a PHP value.
+     *
+     *  Usage:
+     *  <code>
+     *   $array = Yaml::parseFile('config.yml');
+     *   print_r($array);
+     *  </code>
+     *
+     * @param string $filename The path to the YAML file to be parsed
+     * @param int    $flags    A bit field of PARSE_* constants to customize the YAML parser behavior
+     *
+     * @return mixed The YAML converted to a PHP value
+     *
+     * @throws ParseException If the file could not be read or the YAML is not valid
+     */
+    public static function parseFile(string $filename, int $flags = 0)
+    {
+        $yaml = new Parser();
+
+        return $yaml->parseFile($filename, $flags);
+    }
+
+    /**
+     * Parses YAML into a PHP value.
+     *
+     *  Usage:
+     *  <code>
+     *   $array = Yaml::parse(file_get_contents('config.yml'));
+     *   print_r($array);
+     *  </code>
+     *
+     * @param string $input A string containing YAML
+     * @param int    $flags A bit field of PARSE_* constants to customize the YAML parser behavior
+     *
+     * @return mixed The YAML converted to a PHP value
+     *
+     * @throws ParseException If the YAML is not valid
+     */
+    public static function parse(string $input, int $flags = 0)
+    {
+        $yaml = new Parser();
+
+        return $yaml->parse($input, $flags);
+    }
+
+    /**
+     * Dumps a PHP value to a YAML string.
+     *
+     * The dump method, when supplied with an array, will do its best
+     * to convert the array into friendly YAML.
+     *
+     * @param mixed $input  The PHP value
+     * @param int   $inline The level where you switch to inline YAML
+     * @param int   $indent The amount of spaces to use for indentation of nested nodes
+     * @param int   $flags  A bit field of DUMP_* constants to customize the dumped YAML string
+     *
+     * @return string A YAML string representing the original PHP value
+     */
+    public static function dump($input, int $inline = 2, int $indent = 4, int $flags = 0): string
+    {
+        $yaml = new Dumper($indent);
+
+        return $yaml->dump($input, $inline, 0, $flags);
+    }
+}
diff --git a/vendor/symfony/yaml/composer.json b/vendor/symfony/yaml/composer.json
new file mode 100644
index 0000000..6537e42
--- /dev/null
+++ b/vendor/symfony/yaml/composer.json
@@ -0,0 +1,43 @@
+{
+    "name": "symfony/yaml",
+    "type": "library",
+    "description": "Symfony Yaml Component",
+    "keywords": [],
+    "homepage": "https://symfony.com",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Fabien Potencier",
+            "email": "fabien@symfony.com"
+        },
+        {
+            "name": "Symfony Community",
+            "homepage": "https://symfony.com/contributors"
+        }
+    ],
+    "require": {
+        "php": "^7.1.3",
+        "symfony/polyfill-ctype": "~1.8"
+    },
+    "require-dev": {
+        "symfony/console": "~3.4|~4.0"
+    },
+    "conflict": {
+        "symfony/console": "<3.4"
+    },
+    "suggest": {
+        "symfony/console": "For validating YAML files using the lint command"
+    },
+    "autoload": {
+        "psr-4": { "Symfony\\Component\\Yaml\\": "" },
+        "exclude-from-classmap": [
+            "/Tests/"
+        ]
+    },
+    "minimum-stability": "dev",
+    "extra": {
+        "branch-alias": {
+            "dev-master": "4.1-dev"
+        }
+    }
+}
diff --git a/vendor/symfony/yaml/phpunit.xml.dist b/vendor/symfony/yaml/phpunit.xml.dist
new file mode 100644
index 0000000..7c732f8
--- /dev/null
+++ b/vendor/symfony/yaml/phpunit.xml.dist
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="http://schema.phpunit.de/4.1/phpunit.xsd"
+         backupGlobals="false"
+         colors="true"
+         bootstrap="vendor/autoload.php"
+         failOnRisky="true"
+         failOnWarning="true"
+>
+    <php>
+        <ini name="error_reporting" value="-1" />
+    </php>
+
+    <testsuites>
+        <testsuite name="Symfony Yaml Component Test Suite">
+            <directory>./Tests/</directory>
+        </testsuite>
+    </testsuites>
+
+    <filter>
+        <whitelist>
+            <directory>./</directory>
+            <exclude>
+                <directory>./Tests</directory>
+                <directory>./vendor</directory>
+            </exclude>
+        </whitelist>
+    </filter>
+</phpunit>