Anonymous classes
-----
<?php

new class {};
new class extends A implements B, C {};
new class($a) extends A {
    private $a;
    public function __construct($a) {
        $this->a = $a;
    }
};
new readonly class {};
-----
new class
{
};
new class extends A implements B, C
{
};
new class($a) extends A
{
    private $a;
    public function __construct($a)
    {
        $this->a = $a;
    }
};
new readonly class
{
};