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diff --git a/vendor/symfony/css-selector/Parser/Tokenizer/TokenizerPatterns.php b/vendor/symfony/css-selector/Parser/Tokenizer/TokenizerPatterns.php
new file mode 100644
index 000000000..5b071cd09
--- /dev/null
+++ b/vendor/symfony/css-selector/Parser/Tokenizer/TokenizerPatterns.php
@@ -0,0 +1,162 @@
+<?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\CssSelector\Parser\Tokenizer;
+
+/**
+ * CSS selector tokenizer patterns builder.
+ *
+ * This component is a port of the Python cssselect library,
+ * which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect.
+ *
+ * @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com>
+ *
+ * @internal
+ */
+class TokenizerPatterns
+{
+    /**
+     * @var string
+     */
+    private $unicodeEscapePattern;
+
+    /**
+     * @var string
+     */
+    private $simpleEscapePattern;
+
+    /**
+     * @var string
+     */
+    private $newLineEscapePattern;
+
+    /**
+     * @var string
+     */
+    private $escapePattern;
+
+    /**
+     * @var string
+     */
+    private $stringEscapePattern;
+
+    /**
+     * @var string
+     */
+    private $nonAsciiPattern;
+
+    /**
+     * @var string
+     */
+    private $nmCharPattern;
+
+    /**
+     * @var string
+     */
+    private $nmStartPattern;
+
+    /**
+     * @var string
+     */
+    private $identifierPattern;
+
+    /**
+     * @var string
+     */
+    private $hashPattern;
+
+    /**
+     * @var string
+     */
+    private $numberPattern;
+
+    /**
+     * @var string
+     */
+    private $quotedStringPattern;
+
+    /**
+     * Constructor.
+     */
+    public function __construct()
+    {
+        $this->unicodeEscapePattern = '\\\\([0-9a-f]{1,6})(?:\r\n|[ \n\r\t\f])?';
+        $this->simpleEscapePattern = '\\\\(.)';
+        $this->newLineEscapePattern = '\\\\(?:\n|\r\n|\r|\f)';
+        $this->escapePattern = $this->unicodeEscapePattern.'|\\\\[^\n\r\f0-9a-f]';
+        $this->stringEscapePattern = $this->newLineEscapePattern.'|'.$this->escapePattern;
+        $this->nonAsciiPattern = '[^\x00-\x7F]';
+        $this->nmCharPattern = '[_a-z0-9-]|'.$this->escapePattern.'|'.$this->nonAsciiPattern;
+        $this->nmStartPattern = '[_a-z]|'.$this->escapePattern.'|'.$this->nonAsciiPattern;
+        $this->identifierPattern = '(?:'.$this->nmStartPattern.')(?:'.$this->nmCharPattern.')*';
+        $this->hashPattern = '#((?:'.$this->nmCharPattern.')+)';
+        $this->numberPattern = '[+-]?(?:[0-9]*\.[0-9]+|[0-9]+)';
+        $this->quotedStringPattern = '([^\n\r\f%s]|'.$this->stringEscapePattern.')*';
+    }
+
+    /**
+     * @return string
+     */
+    public function getNewLineEscapePattern()
+    {
+        return '~^'.$this->newLineEscapePattern.'~';
+    }
+
+    /**
+     * @return string
+     */
+    public function getSimpleEscapePattern()
+    {
+        return '~^'.$this->simpleEscapePattern.'~';
+    }
+
+    /**
+     * @return string
+     */
+    public function getUnicodeEscapePattern()
+    {
+        return '~^'.$this->unicodeEscapePattern.'~i';
+    }
+
+    /**
+     * @return string
+     */
+    public function getIdentifierPattern()
+    {
+        return '~^'.$this->identifierPattern.'~i';
+    }
+
+    /**
+     * @return string
+     */
+    public function getHashPattern()
+    {
+        return '~^'.$this->hashPattern.'~i';
+    }
+
+    /**
+     * @return string
+     */
+    public function getNumberPattern()
+    {
+        return '~^'.$this->numberPattern.'~';
+    }
+
+    /**
+     * @param string $quote
+     *
+     * @return string
+     */
+    public function getQuotedStringPattern($quote)
+    {
+        return '~^'.sprintf($this->quotedStringPattern, $quote).'~i';
+    }
+}