init

backend/vendor/doctrine/sql-formatter/src/Cursor.php

@@ -0,0 +1,52 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\SqlFormatter;
+
+final class Cursor
+{
+    private int $position = -1;
+
+    /** @param list<Token> $tokens */
+    public function __construct(
+        private readonly array $tokens,
+    ) {
+    }
+
+    /** @param Token::TOKEN_TYPE_* $exceptTokenType */
+    public function next(int|null $exceptTokenType = null): Token|null
+    {
+        while ($token = $this->tokens[++$this->position] ?? null) {
+            if ($exceptTokenType !== null && $token->isOfType($exceptTokenType)) {
+                continue;
+            }
+
+            return $token;
+        }
+
+        return null;
+    }
+
+    /** @param Token::TOKEN_TYPE_* $exceptTokenType */
+    public function previous(int|null $exceptTokenType = null): Token|null
+    {
+        while ($token = $this->tokens[--$this->position] ?? null) {
+            if ($exceptTokenType !== null && $token->isOfType($exceptTokenType)) {
+                continue;
+            }
+
+            return $token;
+        }
+
+        return null;
+    }
+
+    public function subCursor(): self
+    {
+        $cursor           = new self($this->tokens);
+        $cursor->position = $this->position;
+
+        return $cursor;
+    }
+}