I am new to using coarrays in Fortran. At the moment I am rewriting one of my MPI codes in CAF. My mental picture is that expressing an array as a coarray [i.e., with square brackets] simply exposes the possibility of performing communication of that array among images.
In my case I have a certain array that is declared as a coarray at the beginning. But eventually in the subroutine hierarchy I reach a point where there is no more communication required. My question is: If I pass a previously declared coarray to a subroutine, must the corresponding dummy array be declared as a coarray if it will not, in that subroutine or any subsequent calls in that routine, be accessed via communication?
Thank you for your reply. Strange that there must have been some discussion 11 months ago, because I thought my question was answered, but now there appears to be no record of the discussion.
I think some people opt to set their messages to self-destruct in 24 hours, just like the Inspector gadget used to. I did not notice this question was old.
Indeed, there is a deleted message in this thread, which contains the previous context and answer. Any user is free to delete their post again, though (there is a time restriction of 6 months if I read the discourse settings correctly).
However, deleting a message bumps the thread up on the main page again, due to the deletion event, which could cause some confusion.
Something along this lines was discussed here, I think:
