[TwigComponent] Fix loadTemplate deprecation for Twig >= 3.21

Fix #2710

cf twigphp/Twig#4583

Author: smnandre

src/TwigComponent/CHANGELOG.md

@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## 2.25.0
+
+-  Fix `Template#loadTemplate` deprecation for Twig >=3.21
+
 ## 2.20.0
 
 -  Add Anonymous Component support for 3rd-party bundles #2019

src/TwigComponent/src/Twig/ComponentNode.php

@@ -19,6 +19,7 @@
 use Twig\Node\Expression\AbstractExpression;
 use Twig\Node\Node;
 use Twig\Node\NodeOutputInterface;
+use Twig\Template;
 
 /**
  * @author Fabien Potencier <[email protected]>
@@ -154,16 +155,29 @@ public function compile(Compiler $compiler): void
         if ($useYield) {
             $compiler->write('yield from ');
         }
-        $compiler
-            ->write('$this->loadTemplate(')
-            ->string($this->getAttribute('embedded_template'))
-            ->raw(', ')
-            ->repr($this->getTemplateName())
-            ->raw(', ')
-            ->repr($this->getTemplateLine())
-            ->raw(', ')
-            ->string($this->getAttribute('embedded_index'))
-            ->raw(')');
+
+        if (method_exists(Template::class, 'load')) {
+            $compiler
+               ->write('$this->load(')
+               ->string($this->getAttribute('embedded_template'))
+               ->raw(', ')
+               ->repr($this->getTemplateLine())
+               ->raw(', ')
+               ->string($this->getAttribute('embedded_index'))
+               ->raw(')');
+        } else {
+            // @deprecated since Twig 3.21
+            $compiler
+                ->write('$this->loadTemplate(')
+                ->string($this->getAttribute('embedded_template'))
+                ->raw(', ')
+                ->repr($this->getTemplateName())
+                ->raw(', ')
+                ->repr($this->getTemplateLine())
+                ->raw(', ')
+                ->string($this->getAttribute('embedded_index'))
+                ->raw(')');
+        }
 
         if ($useYield) {
             $compiler->raw('->unwrap()->yield(');