Github #26532: di:setup:compile fails with anonymous classes

[YevSent]

Description (*)

• Fixed parsing for anonymous classes during di:compile run
• Small code optimizations
• Extended and refactored related unit tests

Fixed Issues (if relevant)

1. di:setup:compile fails with anonymous classes #26532: di:setup:compile fails with anonymous classes
2. Anonyomus classes in 2.3 (test data provider) #21555: Anonymous classes in 2.3 (test data provider)

Manual testing scenarios (*)

1. Create a dummy class which contains an anonymous class, like Magento\DummyModule\Dummy (see a sample below)
2. Run bin/magento setup:di:compile CLI command

Sample class:

namespace Magento\DummyModule;

class Dummy
{
    public function execute($arg)
    {
        return new class($arg) {
            private $arg;

            public function __construct($arg)
            {
                $this->arg = $arg;
            }

            public function serialize()
            {
                return (string) $this->arg;
            }
        };
    }
}

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds are green)

[m2-assistant]

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[magento-engcom-team]

Hi @Stepa4man, thank you for the review.
ENGCOM-6686 has been created to process this Pull Request
✳️ @Stepa4man, could you please add one of the following labels to the Pull Request?

Label	Description
Auto-Tests: Covered	All changes in Pull Request is covered by auto-tests
Auto-Tests: Not Covered	Changes in Pull Request requires coverage by auto-tests
Auto-Tests: Not Required	Changes in Pull Request does not require coverage by auto-tests

[Stepa4man]

@magento run all tests

[engcom-Alfa]

✔️ QA Passed

Before:

After:

[YevSent]

Based on the internal discussion with @buskamuza, I made small refactoring and code simplification.

[m2-assistant]

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