Fix compiling class loader

Author: thekid

README.md

@@ -16,7 +16,7 @@ After adding the compiler to your project via `composer require xp-framework/com
 
 Example
 -------
-The following code uses Hack language, PHP 8.4, PHP 8.3, PHP 8.2, 8.1 and 8.0 features but runs on anything >= PHP 7.4. Builtin features from newer PHP versions are translated to work with the currently executing runtime if necessary.
+The following code uses Hack language, PHP 8.6, PHP 8.5, PHP 8.4, PHP 8.3, PHP 8.2, 8.1 and 8.0 features but runs on anything >= PHP 7.4. Builtin features from newer PHP versions are translated to work with the currently executing runtime if necessary.
 
 ```php
 <?php // In a file "HelloWorld.php"
@@ -34,7 +34,8 @@ class HelloWorld {
     $greet= fn($to, $from) => self::GREETING.' '.$to.' from '.$from;
     $author= Reflection::type(self::class)->annotation(Author::class)->argument(0);
 
-    Console::writeLine(new Date()->toString(), ': ', $greet($args[0] ?? 'World', from: $author));
+    Console::writeLine(new Date()->toString(), ': ');
+    $greet($args[0] ?? 'World', from: $author) |> Console::writeLine(?);
   }
 }
 ```

src/main/php/lang/ast/CompilingClassloader.class.php

@@ -2,6 +2,7 @@
 
 use lang\ast\emit\Reflection;
 use lang\ast\emit\php\XpMeta;
+use lang\ast\nodes\Placeholder;
 use lang\{
   ClassFormatException,
   ClassLoader,
@@ -23,6 +24,7 @@ class CompilingClassLoader implements IClassLoader {
   static function __static() {
 
     // See https://github.com/xp-framework/compiler/issues/122
+    Placeholder::__static();
     Reflection::__static();
   }
 

src/test/php/lang/ast/unittest/emit/EmulatePipelinesTest.class.php

@@ -56,7 +56,15 @@ public function to_callable_new() {
   }
 
   #[Test]
-  public function to_partial_function_application() {
+  public function to_partial_function_application_first() {
+    Assert::equals(
+      '\Console::writeLine("hi");',
+      $this->emit('"hi" |> Console::writeLine(?);')
+    );
+  }
+
+  #[Test]
+  public function to_partial_function_application_last() {
     Assert::equals(
       'str_replace("hi","hello","hi");',
       $this->emit('"hi" |> str_replace("hi", "hello", ?);')