New rule: Interface implemenations split across lines

[janisint]

Feature request

When a class implements multiple interfaces, it can quickly become unreadable.

That's why the PSR-2 section 4.1. Extends and Implements states that you MAY split the list of implements across lines:

class MyClass implements 
    SomeInterface,
    SecondInterface,
    ThirdInterface
{
}

I would appreciate if there was a PHP-CS-Fixer rule that does the multi-line split automatically.

Ideally with a given threshold (amount of implemented interfaces) as to where it changes from single-line to multi-line.

Let me know your thoughts about it.

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[keradus]

Hi and thanks for your request.

Is this part of a standard or used by a bigger (F)OSS community? For us that is a condition to add a rule to this project. Otherwise, you can create a custom fixer and use that in your projects. Thanks for understanding.

[janisint]

Hi, thanks for your response.

Yes, this is part of a standard. As initially stated, PSR-12 (the Php Standard Recommendations which most open source PHP projects follow) suggest you either have all your implemented interfaces in one line, or you may split them on separate lines.

Therefore, I think it would make sense for PHP-CS-Fixer to support this standard and provide the 'split across lines' option.