1 files changed, 58 insertions, 0 deletions
diff --git a/vendor/vlucas/phpdotenv/src/Parser/Lexer.php b/vendor/vlucas/phpdotenv/src/Parser/Lexer.php
new file mode 100644
index 0000000..981af24
--- /dev/null
+++ b/vendor/vlucas/phpdotenv/src/Parser/Lexer.php
@@ -0,0 +1,58 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Dotenv\Parser;
+
+final class Lexer
+{
+    /**
+     * The regex for each type of token.
+     */
+    private const PATTERNS = [
+        '[\r\n]{1,1000}', '[^\S\r\n]{1,1000}', '\\\\', '\'', '"', '\\#', '\\$', '([^(\s\\\\\'"\\#\\$)]|\\(|\\)){1,1000}',
+    ];
+
+    /**
+     * This class is a singleton.
+     *
+     * @codeCoverageIgnore
+     *
+     * @return void
+     */
+    private function __construct()
+    {
+        //
+    }
+
+    /**
+     * Convert content into a token stream.
+     *
+     * Multibyte string processing is not needed here, and nether is error
+     * handling, for performance reasons.
+     *
+     * @param string $content
+     *
+     * @return \Generator<string>
+     */
+    public static function lex(string $content)
+    {
+        static $regex;
+
+        if ($regex === null) {
+            $regex = '(('.\implode(')|(', self::PATTERNS).'))A';
+        }
+
+        $offset = 0;
+
+        while (isset($content[$offset])) {
+            if (!\preg_match($regex, $content, $matches, 0, $offset)) {
+                throw new \Error(\sprintf('Lexer encountered unexpected character [%s].', $content[$offset]));
+            }
+
+            $offset += \strlen($matches[0]);
+
+            yield $matches[0];
+        }
+    }
+}