feature #4518 Add invoke filter (Lorenz, Lorenzschaef, fabpot)

This PR was merged into the 3.x branch.

Discussion
----------

Add invoke filter

Adds a new filter `invoke`, to invoke arrow functions and other php callables.

See the discussion here: #4378 (comment)

Commits
-------

3e93e91 Finish the work
c4fd25f fix indentation
dacbe51 Apply suggestions from code review
2b95bd6 typo
09c30c3 fix merge
d58ac9a docs and changelog
edecc13 typehint instead of checkArrow
f271158 checkArrow, typehints
8b43275 invoke filter

CHANGELOG

@@ -1,5 +1,6 @@
 # 3.19.0 (2025-XX-XX)
 
+ * Add the `invoke` filter
  * Make `{}` optional for the `types` tag
  * Add `LastModifiedExtensionInterface` and implementation in `AbstractExtension` to track modification of runtime classes
 

doc/filters/invoke.rst

@@ -0,0 +1,16 @@
+``invoke``
+==========
+
+.. versionadded:: 3.19
+
+    The ``invoke`` filter has been added in Twig 3.19.
+
+The ``invoke`` filter invokes an arrow function with the given arguments:
+
+.. code-block:: twig
+
+    {% set person = { first: "Bob", last: "Smith" } %}
+    {% set func = p => "#{p.first} #{p.last}" %}
+
+    {{ func|invoke(person) }}
+    {# outputs Bob Smith #}

doc/templates.rst

@@ -1018,6 +1018,13 @@ The following operators don't fit into any of the other categories:
     Arrow function support for functions, macros, and method calls was added in
     Twig 3.15 (filters and tests were already supported).
 
+  Arrow functions can be called using the :doc:`invoke </filters/invoke>`
+  filter.
+
+  .. versionadded:: 3.19
+
+    The ``invoke`` filter has been added in Twig 3.19.
+
 Operators
 ~~~~~~~~~
 

src/Extension/CoreExtension.php

@@ -266,6 +266,7 @@ public function getFilters(): array
             // iteration and runtime
             new TwigFilter('default', [self::class, 'default'], ['node_class' => DefaultFilter::class]),
             new TwigFilter('keys', [self::class, 'keys']),
+            new TwigFilter('invoke', [self::class, 'invoke']),
         ];
     }
 
@@ -915,6 +916,16 @@ public static function keys($array): array
         return array_keys($array);
     }
 
+    /**
+     * Invokes a callable
+     *
+     * @internal
+     */
+    public static function invoke(\Closure $arrow, ...$arguments): mixed
+    {
+        return $arrow(...$arguments);
+    }
+
     /**
      * Reverses a variable.
      *

tests/Fixtures/filters/invoke.test

@@ -0,0 +1,14 @@
+--TEST--
+"invoke" filter
+--TEMPLATE--
+{% set func = x => 'Hello '~x %}
+{{ func|invoke('World') }}
+{% set func2 = (x, y) => x+y %}
+{{ func2|invoke(3, 2) }}
+--DATA--
+return []
+--CONFIG--
+return []
+--EXPECT--
+Hello World
+5