Property hooks not supported

Problem/Motivation

It looks like property hooks (a PHP 8.4 feature) are not supported by coder.

An error occurred during processing; checking has been aborted. The error message was: $stackPtr is not a class member var

The error originated in the Drupal.NamingConventions.ValidVariableName sniff on line 41.

Note that property hooks are also not supported upstream by squizlabs/php_codesniffer, see https://github.com/PHPCSStandards/PHP_CodeSniffer/issues/734

Steps to reproduce

You can reproduce this on the example code at https://www.php.net/manual/en/language.oop5.property-hooks.php

class Example
{
    private bool $modified = false;

    public string $foo = 'default value' {
        get {
            if ($this->modified) {
                return $this->foo . ' (modified)';
            }
            return $this->foo;
        }
        set(string $value) {
            $this->foo = strtolower($value);
            $this->modified = true;
        }
    }
}

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes