force loading class aliases used in typehints

src/Extension/ExtensionInterface.php

@@ -18,6 +18,9 @@ use Twig\TwigFilter;
 use Twig\TwigFunction;
 use Twig\TwigTest;
 
+// Ensure that the aliased name is loaded to keep BC for classes implementing the typehint with the old aliased name.
+class_exists('Twig\Environment');
+
 /**
  * Interface implemented by extension classes.
  *

src/Node/Node.php

@@ -14,6 +14,9 @@ namespace Twig\Node;
 
 use Twig\Compiler;
 
+// Ensure that the aliased name is loaded to keep BC for classes implementing the typehint with the old aliased name.
+class_exists('Twig\Compiler');
+
 /**
  * Represents a node in the AST.
  *

src/NodeVisitor/NodeVisitorInterface.php

@@ -13,6 +13,9 @@ namespace Twig\NodeVisitor;
 
 use Twig\Environment;
 
+// Ensure that the aliased name is loaded to keep BC for classes implementing the typehint with the old aliased name.
+class_exists('Twig\Environment');
+
 /**
  * Interface for node visitor classes.
  *

src/TokenParser/TokenParserInterface.php

@@ -15,6 +15,10 @@ use Twig\Error\SyntaxError;
 use Twig\Parser;
 use Twig\Token;
 
+// Ensure that the aliased name is loaded to keep BC for classes implementing the typehint with the old aliased name.
+class_exists('Twig\Token');
+class_exists('Twig\Parser');
+
 /**
  * Interface implemented by token parsers.
  *

src/TwigFilter.php

@@ -13,6 +13,9 @@ namespace Twig;
 
 use Twig\Node\Node;
 
+// Ensure that the aliased name is loaded to keep BC for classes implementing the typehint with the old aliased name.
+class_exists('Twig\Node\Node');
+
 /**
  * Represents a template filter.
  *

src/TwigFunction.php

@@ -13,6 +13,9 @@ namespace Twig;
 
 use Twig\Node\Node;
 
+// Ensure that the aliased name is loaded to keep BC for classes implementing the typehint with the old aliased name.
+class_exists('Twig\Node\Node');
+
 /**
  * Represents a template function.
  *