Deprecate all symbols in the Doctrine\Common\Proxy namespace

[nicolas-grekas]

Allowed by doctrine/orm#10837

[derrabus]

Do we actually plan to release a v4 without Proxies? If the ORM does not use common proxies anymore, we'd simply drop the dependency.

[nicolas-grekas]

Do we actually plan to release a v4 without Proxies?

This would cut the maintenance yes. Proxies are hard to maintain, especially in the form they take in this repo (see PRs related to readonly or enums for examples.)

[derrabus]

I understand that, but what remains of this library if we remove proxies is not worth maintaining imho. I think, we can simply archive the repo once the ORM doesn't use it anymore.

[nicolas-grekas]

It'd still be great to release a version with deprecations, so that ppl that rely on eg instanceof Common\Proxy\Proxy can know they should move on.

[derrabus]

Okay, how about:

• Annotate all classes and interfaces with @deprecated, not just the Proxy stuff
• Remove all mentions of version 4.0
• No runtime deprecation warnings as there is no urge to resolve them.
• A note in the README about our plans of sunsetting this library

[nicolas-grekas]

Remove all mentions of version 4.0
No runtime deprecation warnings as there is no urge to resolve them.

Done for those

For the rest, that's a separate effort to me.