Can function return drop some elements from list? Bug or feature?

Can function return drop some elements from list? Bug or feature?

[Sasha Shashkevich]

Dear all,

I'm not sure if this a elisp bug or known behavior, so I'm posting my question here.

Some forewords first. I'm using irony-mode for editing my code and faced issue when code checker was unable to find some include headers. Pretty much trivial situation, so I've rechecked my environment and it was okay. After some analysis I've found place in irony-mode sources where list with compiling options (used by code checker) was cut at function return. I rewrote how function returns a list and my issue has gone.

More details with code you can find here: https://github.com/Sarcasm/irony-mode/issues/333

I'm not elisp expert, so question to experts: this is a elisp bug or normal behavior (and irony-mode bug), can be list somehow cut on return from function?

Regards,
Alexander

Re: Can function return drop some elements from list? Bug or feature?

[Andreas Schwab]

On Sep 16 2016, Sasha Shashkevich <alex@stunpix.com> wrote:

> I'm not elisp expert, so question to experts: this is a elisp bug or
> normal behavior (and irony-mode bug), can be list somehow cut on return
> from function?

You compute the return value from the loop variable e, which changes
each round through the loop.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."

Re: Can function return drop some elements from list? Bug or feature?

[Sasha Shashkevich]

>> I'm not elisp expert, so question to experts: this is a elisp bug or
>> normal behavior (and irony-mode bug), can be list somehow cut on return
>> from function?
> 
> You compute the return value from the loop variable e, which changes
> each round through the loop.

Definitely. How I couldn't see that? Question is closed.
Thank you!

Alexander.