[External] : Re: Draft JEP Announcement: "Computed Constants"

[Per-Ake Minborg]

Hi David.

Thanks for the encouragement.

You can actually *reference* CC objects in a circular way as long as you do not create circularity in the *evaluation* of CC objects. So, it is, for example, perfectly legal to query if a CC is bound via the isBound() method in a circular way.

Just to remind you, initialization can only be made at most once per CC instance/element.

Best, Per
________________________________
From: David Alayachew <davidalayachew at gmail.com>
Sent: Thursday, July 27, 2023 7:27 PM
To: Per-Ake Minborg <per-ake.minborg at oracle.com>
Cc: leyden-dev at openjdk.org <leyden-dev at openjdk.org>
Subject: [External] : Re: Draft JEP Announcement: "Computed Constants"

Hello Per,

Thank you for posting this JEP!

It looks great. The solution is concise, clear, and simple, and any complaints I have about verbosity can be mostly addressed with var. And that list suggestion was especially nice. That's very neat.

I'd like to ask about the safety point. I certainly understand the reason why it exists -- some developers will inadvertently create a circular reference and end up causing problems.

However, I see a lot of utility for circular references too. Any chance that we could allow devs to opt-in to circular references?

Earlier this month, I started 2 threads that were broaching the subject of a very similar pain point to this one. Here they both are.

https://mail.openjdk.org/pipermail/amber-dev/2023-July/008129.html

https://mail.openjdk.org/pipermail/amber-dev/2023-July/008154.html

I'm curious how this Computed Constant solution would work out for the problem I have. But in order for it to work, it would need to enable circular references, hence my question.

But even without it, I see a lot of utility for this tool. I'm excited to get to work prototyping with it.

Thank you for your time and help!
David Alayachew
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