From 9130b27acaa454a909dab56dc2fd128513385a11 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gr=C3=A9goire=20Paris?= <gregoire.paris@manomano.com>
Date: Tue, 27 Sep 2022 13:35:13 +0200
Subject: [PATCH] Remove return type override

In the parent class, all 3 methods are documented to return mixed.
This was not forward compatible with the addition of return types.
---
 lib/Doctrine/ORM/Persisters/SqlValueVisitor.php | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/lib/Doctrine/ORM/Persisters/SqlValueVisitor.php b/lib/Doctrine/ORM/Persisters/SqlValueVisitor.php
index 301ab273c2f..a61d0a25f86 100644
--- a/lib/Doctrine/ORM/Persisters/SqlValueVisitor.php
+++ b/lib/Doctrine/ORM/Persisters/SqlValueVisitor.php
@@ -23,7 +23,7 @@ class SqlValueVisitor extends ExpressionVisitor
     /**
      * Converts a comparison expression into the target query language output.
      *
-     * @return void
+     * {@inheritDoc}
      */
     public function walkComparison(Comparison $comparison)
     {
@@ -32,35 +32,39 @@ public function walkComparison(Comparison $comparison)
         $operator = $comparison->getOperator();
 
         if (($operator === Comparison::EQ || $operator === Comparison::IS) && $value === null) {
-            return;
+            return null;
         } elseif ($operator === Comparison::NEQ && $value === null) {
-            return;
+            return null;
         }
 
         $this->values[] = $value;
         $this->types[]  = [$field, $value, $operator];
+
+        return null;
     }
 
     /**
      * Converts a composite expression into the target query language output.
      *
-     * @return void
+     * {@inheritDoc}
      */
     public function walkCompositeExpression(CompositeExpression $expr)
     {
         foreach ($expr->getExpressionList() as $child) {
             $this->dispatch($child);
         }
+
+        return null;
     }
 
     /**
      * Converts a value expression into the target query language part.
      *
-     * @return void
+     * {@inheritDoc}
      */
     public function walkValue(Value $value)
     {
-        return;
+        return null;
     }
 
     /**