Unable to have an anonymous readonly class

[claudepache]

Description

The following code:

<?php

$a = new readonly class {
    public int $x;
    function __construct() {
        $this->x = 2;
     }
};
var_dump($a->x);

Resulted in this output:

Parse error: syntax error, unexpected token "readonly" in /in/3uciU on line 3

But I expected this output instead:

int(2)

PHP Version

PHP 8.2.1

Operating System

No response

[cmb69]

Indeed:

php-src/Zend/zend_language_parser.y

Lines 1090 to 1097 in 148ac36

	new_expr:
	T_NEW class_name_reference ctor_arguments
	{ $$ = zend_ast_create(ZEND_AST_NEW, $2, $3); }
	| T_NEW anonymous_class
	{ $$ = $2; }
	| T_NEW attributes anonymous_class
	{ zend_ast_with_attributes($3->child[0], $2); $$ = $3; }
	;

[nielsdos]

If no one is working on this yet and not planning to work on this, I'd like to give this a shot :)

[kocsismate]

The PR LGTM, however I'm glad if someone has suggestions about the target branch. I shared my preference in the PR