1 files changed, 52 insertions, 0 deletions

diff --git a/vendor/doctrine/collections/src/Expr/ExpressionVisitor.php b/vendor/doctrine/collections/src/Expr/ExpressionVisitor.php
new file mode 100644
index 0000000..afbd3d1
--- /dev/null
+++ b/vendor/doctrine/collections/src/Expr/ExpressionVisitor.php
@@ -0,0 +1,52 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Common\Collections\Expr;
+
+use RuntimeException;
+
+/**
+ * An Expression visitor walks a graph of expressions and turns them into a
+ * query for the underlying implementation.
+ */
+abstract class ExpressionVisitor
+{
+    /**
+     * Converts a comparison expression into the target query language output.
+     *
+     * @return mixed
+     */
+    abstract public function walkComparison(Comparison $comparison);
+
+    /**
+     * Converts a value expression into the target query language part.
+     *
+     * @return mixed
+     */
+    abstract public function walkValue(Value $value);
+
+    /**
+     * Converts a composite expression into the target query language output.
+     *
+     * @return mixed
+     */
+    abstract public function walkCompositeExpression(CompositeExpression $expr);
+
+    /**
+     * Dispatches walking an expression to the appropriate handler.
+     *
+     * @return mixed
+     *
+     * @throws RuntimeException
+     */
+    public function dispatch(Expression $expr)
+    {
+        return match (true) {
+            $expr instanceof Comparison => $this->walkComparison($expr),
+            $expr instanceof Value => $this->walkValue($expr),
+            $expr instanceof CompositeExpression => $this->walkCompositeExpression($expr),
+            default => throw new RuntimeException('Unknown Expression ' . $expr::class),
+        };
+    }
+}