[J3] Should ALLOCATED return True or False if ARRAY is zero-sized?

[Steve Lionel]

I recall this issue arising in Intel Fortran (or maybe even DEC Fortrran) -
ALLOCATED should return true even if the object is zero-sized.

Steve

On Fri, Jul 11, 2025 at 11:50 AM Daniel Chen via J3 <
j3 at mailman.j3-fortran.org> wrote:

> Hello all,
>
> ```
> real, allocatable :: r1(:)
> allocate(r1(0))
> print*, allocated(r1)
> end
> ```
>
> The standard seems allowing allocating a zero-sized array ([9.7.1.2
> Execution of an ALLOCATE statement]. Therefore, intrinsic ALLOCATED
> should return True for this code.
> Is this conclusion correct?
>
> Thanks,
> Daniel
>
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