On 26/08/2024 11:11, Andreas Leathley wrote:
On 26.08.24 11:26, Bilge wrote:
I would like to fix this if possible, because I think this should be
valid, with emphasis on /if possible/, because it may be
prohibitively complex. Will update later.
That would be a way to fix it, to basically make isset(default) a
possible check if there is no default, similar to an undefined
variable check. It would also recognize a default value of null as not
set in the same way, so one could not differentiate between null and
not defined, but that is in line with the language in general.
It would not be possible to write `isset(default)` because `isset()`
does not operate on expressions. Similarly, it would not be possible to
write `default === null ? ... : ...` because you would receive the same
error as above. If we special-case null coalesce then it will literally
only be possible to check with null coalesce.
As for feasibility, I definitely believe it is feasible. Though some may
argue whether it's worth the trouble for this edge case, I would still
like to implement it.
Cheers,
Bilge
