Where to add "#[YieldReady]"?

[RobbieLePommie]

We are getting the error Using "echo" is deprecated, use "yield" instead in "[filename]", then flag the class with #[YieldReady]. (Twig 3.10)

Where does this need to be added? Is there any documentation to follow?

The entirety of the class that is being flagged is as below. We have also "flagged" every custom class associated with Twig but to no avail.

declare(strict_types=1);

namespace Common\General\Site\TwigDebugger;

use jblond\TwigTrans\TransNode;

#[YieldReady]
class TransNodeDebug extends TransNode
{
    #[YieldReady]
    protected function getTransFunction(bool $plural): string
    {
        return $plural ? 'ngettext' : 'gettextDebug';
    }
}

[fabpot]

It should be:

namespace Common\General\Site\TwigDebugger;

use jblond\TwigTrans\TransNode;
use Twig\Attribute\YieldReady;

#[YieldReady]
class TransNodeDebug extends TransNode
{
    #[YieldReady]
    protected function getTransFunction(bool $plural): string
    {
        return $plural ? 'ngettext' : 'gettextDebug';
    }
}

Notice the missing use statement: use Twig\Attribute\YieldReady;

[RobbieLePommie]

Thank you for the response, Fabien. Yes, it was the "use" that was missing.

(For anyone else catching up, the second "YieldReady" in my code was not needed - just the one outside the class).

[fabpot]

Would #4446 have been helpful?

[RobbieLePommie]

Awesome! Yes, that would have saved a fair chunk of searching and testing. Thanks (on behalf of others) for adding.