[J3] [EXTERNAL] Re: Is this legal in F202X? Rank agnosticism and scalars

[Vipul Parekh]

On Tue, Jan 24, 2023 at 11:52 AM Clune, Thomas L. (GSFC-6101) <
thomas.l.clune at nasa.gov> wrote:

> ..
>
>
>
> Yes – SELECT RANK could be the best way to sidestep this concern.  Thanks!
> ..
>

Hi Tom,

That is good to know re: SELECT RANK.

When you consider all your use cases toward templates with Rank-based
generics, do you think SELECT RANK semantics will cover all the scenarios
of interest, like the one you mentioned in the original message here?  That
is, at least as things stand with it in the current standard with no change
as far as I can recall in Fortran 2023?

If I can locate my notes I will share them but my recollection was SELECT
RANK holds great promise but as designed in the standard, there are
limitations.  For example, my understanding is it only be referenced with
*assumed-rank* entities (those defined with .. rank-spec).but what appears
of interest to you from the original message is also *assumed-shape*
received arguments and perhaps even deferred-shape.  So it may be worth a
discussion / proposal you may want to have with /DATA on this.

Regards,
Vipul
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