[Feature Request] PEP 604 Support

Hi @leycec , thanks for a great library!

Upon discovered of this decorator, I thought I’d give beartype a run in my codebase – I am a heavy user of dataclasses. And, of course, a heavy user of runtime-checks!

After the proof-of-concept work, everything still works. But I did notice:

• the from future import __annotations__ had to be removed (I’m a 3.9 user). Is this required by your users?
• the initial performance was poorer – I’d continue to move the handcrafted runtime checks into Is[]. I’d report back later on this.

[TeamSpen210]

Well, latest news is that the Steering Council has deferred accepting either of those PEPs, and are requesting more input from all stakeholders.

[leycec]

Yo, homie! Crazy union supported just dropped. Now you too can leverage the dark power of the | operator to satisfy all your succinct typing needs. Wow coworkers! Wow the wifey! Wow even that twenty-year stray cat with mange you took in against your University roommate’s wishes. You showed him, didn’t you? Now, show everyone else.

All this and more coming up in… beartype 0.10.0. Activate the thunderbolts and lightning, Zeus. 🌩️