Deprecate passing non AbstractExpression nodes to MatchesBinary

CHANGELOG

@@ -1,5 +1,6 @@
 # 3.24.0 (2026-XX-XX)
 
+ * Deprecate passing a non-`AbstractExpression` node to `ParserTwig\Node\Expression\Binary\MatchesBinary` constructor
  * Deprecate passing a non-`AbstractExpression` node to `Parser::setParent()`
  * Add support for renaming variables in object destructuring (`{name: userName} = user`)
  * Add `html_attr_relaxed` escaping strategy that preserves :, @, [, and ] for front-end framework attribute names

doc/deprecated.rst

@@ -242,6 +242,11 @@ Parser
   deprecated as of Twig 3.24; the method will require an ``AbstractExpression``
   instance in Twig 4.0.
 
+* Passing non-``AbstractExpression`` nodes to
+  ``Twig\Node\Expression\Binary\MatchesBinary`` constructor is deprecated as of
+  Twig 3.24; the constructor will require an ``AbstractExpression`` instance in Twig
+  4.0.
+
 * The ``Twig\Parser::getExpressionParser()`` method is deprecated as of Twig
   3.21, use ``Twig\Parser::parseExpression()`` instead.
 

src/Node/Expression/Binary/MatchesBinary.php

@@ -13,6 +13,7 @@ namespace Twig\Node\Expression\Binary;
 
 use Twig\Compiler;
 use Twig\Error\SyntaxError;
+use Twig\Node\Expression\AbstractExpression;
 use Twig\Node\Expression\ConstantExpression;
 use Twig\Node\Expression\ReturnBoolInterface;
 use Twig\Node\Node;
@@ -21,6 +22,13 @@ class MatchesBinary extends AbstractBinary implements ReturnBoolInterface
 {
     public function __construct(Node $left, Node $right, int $lineno)
     {
+        if (!$left instanceof AbstractExpression) {
+            trigger_deprecation('twig/twig', '3.24', 'Passing a "%s" instance to "%s()" first argument is deprecated, pass an "AbstractExpression" instance instead.', $left::class, __METHOD__);
+        }
+        if (!$right instanceof AbstractExpression) {
+            trigger_deprecation('twig/twig', '3.24', 'Passing a "%s" instance to "%s()" second argument is deprecated, pass an "AbstractExpression" instance instead.', $right::class, __METHOD__);
+        }
+
         if ($right instanceof ConstantExpression) {
             $regexp = $right->getAttribute('value');
             set_error_handler(static fn ($t, $m) => throw new SyntaxError(\sprintf('Regexp "%s" passed to "matches" is not valid: %s.', $regexp, substr($m, 14)), $lineno));