Improve weakClosure() signature (#452)

Author: vudaltsov

README.md

@@ -446,9 +446,9 @@ time differences independent of wall-time.
 
 ```php
 /**
- * @template TReturn
- * @param Closure(...):TReturn $closure
- * @return Closure(...):TReturn
+ * @template TClosure of \Closure
+ * @param TClosure $closure
+ * @return TClosure
  */
 function weakClosure(Closure $closure): Closure
 ```

src/functions.php

@@ -129,11 +129,11 @@ function trapSignal(int|array $signals, bool $reference = true, ?Cancellation $c
  * prevent or delay automatic garbage collection.
  * Invoking the returned Closure after the object is destroyed will throw an instance of Error.
  *
- * @template TReturn
+ * @template TClosure of \Closure
  *
- * @param \Closure(...):TReturn $closure
+ * @param TClosure $closure
  *
- * @return \Closure(...):TReturn
+ * @return TClosure
  */
 function weakClosure(\Closure $closure): \Closure
 {
@@ -167,7 +167,7 @@ function weakClosure(\Closure $closure): \Closure
         throw new \RuntimeException('Unable to rebind closure scoped to ' . ($scope?->name ?? $that::class));
     }
 
-    /** @var \Closure(...):TReturn */
+    /** @var TClosure */
     return static function (mixed ...$args) use ($reference, $closure, $useBindTo): mixed {
         $that = $reference->get();
         if (!$that) {