I find your question to potentially be off-topic for Authorship of Code, being obviously broken and 'lacking context'.
I don't see much of a link with our rational for AoC as you're not asking us to explain the code.
Your code doesn't seem to have glaring issues that'd prevent usage, so isn't broken.
At least one user has enough context to see issues with your code.
And so there is enough context for your question to be answered.
The problem is there isn't enough code to tell if there is a logic or alignment problem here.
I don't think any more code is needed to be able to explain one of the logic problem or the alignment problem.
As an answerer can explain both problems.
Closing the question seems like pointless red tape.
- The asker has a bad user experience.
- (Non-diamond) moderators have to then spend time closing the question, reopening it and potentially having to deal with the complaint on Meta.
- Answerers can feel they can't answer it because they'll get downvoted even though it's answerable.
It in all just seems like a net loss for everyone involved.
Where if one C / C++ guru just answered it in a couple of minutes it would be a net benefit, rep would be shared amongst everyone involved and the asker would leave happy. Possibly to return and contribute more to Code Review because of a good experience.
Long in-depth explanation of why this happens
Over time (non-diamond) moderators pick up a gut feeling to be able to tell if a question is on or off topic by skimming the question.
Think of it like us being an AI we've seen the same off-topic thing time and time again that we can pattern match with our learned data set in seconds.
But just like AI our data sets can be biased.
We as a site don't get many "is this correct" questions like yours.
And so from the title we go into the question thinking it's off-topic.
It's hard to say what happens at this point in all users.
But for me I take the gut feeling and put it into words, pointing to what all the problems are in a comment.
This helps prevent me from incorrectly closing an on-topic question.
I've found this has two benefits:
- The site doesn't come across as hostile and hammer happy without reason.
- I don't make a fool of myself.
I've been wrong on meta, and I can say admitting to that is not fun.
The comfort of being wrong in my mind is immeasurably superior.
I'll run through this mental collision test so we can all be on the same page.
So is your question off-topic?
First I go through all of our rules.
This is a very basic gut comparison with a sprinkling of logic.
This filters out most of our rules and leaves us with the ones that seem relevant so we can focus on them.
- Best Practice
This doesn't apply as you're not asking for a best practice you're asking if it has UB.
- Broken - Known
You say it's not not broken so it's not known.
- Context -
Your code looks real enough and complete so is none of these.
Whilst it does have
_example our example reasoning is complicated and it's not a match. It's better to delegate to "Context - context".
- Missing Description
You've not really explained what the code is.
But a "bit field" is a fairly well known datatype.
These are allowed.
- Reviewing Design
Design question's are not off-topic.
- Explination of Code
You're not asking us to explain code.
- Code Inline
The code is inline in the question.
C and C++ are languages we review.
- Purpose of Code
We've not outlawed any questions based on what they do.
- Size - long
You were able to post your question so this is fine.
- Specific Question
These are allowed, we even have a meta somewhat related to your post.
Rules that look appropriate:
Author of Code
You are not the author.
Broken - Unknown
Not providing a test case doesn't make a question off-topic.
However the question you got the code from says the following:
I am trying to implement a C style bitfield in Java. Here is a rough example (I do not have the actual code in front of me at this moment).
Context - Context
Size - short
Whilst there is no size limit it looks a bit short can we actually safely review this?
Ok so my gut and I have found a couple of potential problems with your post.
Lets look into the rules a little more to see if there is a collision and if your post is off-topic.
Author of Code
Moral / Polite
I think this is ok.
You've come here not to shame the author but to learn from their code.
You can't explain why the code is the way it is.
You wouldn't be able to tell me why the code has the variable names it has or why it has whitespace I think is odd. (But I don't know C so it could be normal)
However this doesn't seem too important and you can probably understand the response you'd get.
IANAL but you may have committed a licence violation when posting it on Code Review.
IIRC you have to provide the title, author and licence of the entity.
You've provided one of these.
Overall since the legal aspect is not handled by us, it's a meh from me.
Broken - Unknown
Even though you've said it works fine we have had users post code with syntax errors and other unquestionably broken parts to their code.
In this case it seems like it should compile fine, so it's not broken.
Context - Context
I don't know C or C++ but from the little I've talked to someone I think there is enough context for this to be reviewed.
There is enough context to see "a logic or alignment problem" and so the question can be reasonably reviewed for correctness.
We come here to help people write better code.
Now that I know of these problems with the code I want to know how they can be manifested and how not to hit these problems if I learn C or C++.
Overall I don't really feel compelled that it's off-topic for AoC or being broken.
To close for missing context seems to go against the point of Code Review to me.
I think it's on-topic.