To: J3                                                        07-307
From: Bill Long and John Reid
Subject: Co-arrays should not be interoperable
Date: 2007 October 22
References: J3/07-007r3, 07-276r1

Discussion

In London, see 07-276r1, we decided that we needed to specify that
interfaces with a co-array dummy argument are not interoperable.
The editor did not accept the edit because he thinks that no co-array
should be interoperable. We agree. In particular, we overlooked the fact
that the desire to store co-arrays in a symmetric heap might be in
conflict with C's rules for storage of global variables. Furthermore,
there is some sentiment within WG5 that the co-array feature should be
reduced. This will make a small reduction and the restriction could be
relaxed in a later revision.

Edits:
--------

[467:1] In the first paragraph of 15.3.5 Interoperability of scalar
variables, before "and it" add ", it is not a co-array,".

[467:7] In the first paragraph of 15.3.6 Interoperability of array
variables, before "and it" add ", it is not a co-array,".