disable_partially_abstract_typeconsts hhconfig option can not be set

[lexidor]

disable_partially_abstract_typeconsts hhconfig option can not be set

[lexidor]

It looks like it was added in 2019 and not touched since then, so I wouldn't expect it to change any time soon. I don't think it's necessary to preemptively fix HHAST or other projects, we can always do that if/when someone wants to change the default.

[jjergus]

That said, if you want to enable this option in some of your projects but the HHAST dependency is preventing you, I certainly wouldn't be opposed to fixing it here.

[lexidor]

That said, if you want to enable this option in some of your projects but the HHAST dependency is preventing you, I certainly wouldn't be opposed to fixing it here.

If I knew what this setting did, I could make an informed decision. I don't understand the error it creates either. If others want to turn this feature on, please comment below.

[lexidor]

It seems like this area is being explored again.
facebook/hhvm@e72c9ef

[jjergus]

The current state/plan is now documented here: https://github.com/facebook/hhvm/blob/master/hphp/hack/doc/HIPs/converging_constants.md

[lexidor]

Thanks for publishing the HIP. I have given it a read, but I couldn't take it all in at once. I'll read this again tomorrow. (With a hh_client, hhvm, and pen and paper in hand 😄.)

[lexidor]

This issue has been resolved. The type constant does not have a default value anymore.