(j3.2006) (SC22WG5.3611) Preparing for the Tokyo meeting

Bill Long longb
Fri Oct 31 12:24:11 EDT 2008

John Reid wrote:
> As I see it, the most difficult problems that we need to face in Tokyo are:
> 1. Whether coarrays should be integrated in Part 1.
> 2. Whether to allow coarrays to be volatile.
> I have a suggestion re 1, which no-one seems to like (does this mean it might be 
> suitable as a compromise?!): 

I reject the idea that additional compromise is needed.  We've voted 
over and over on this topic and made a massive compromise at the last 
WG5 meeting to get consensus.  I've read through the new UK papers, and 
there is no new technical information there to suggest need for 
substantial changes.   There will always be a few who will never give up 
their argument that coarrays should not be in the standard.  They need 
to accept that they have lost and discontinue their rants.

> follow the precedent of Fortran 77 where there was 
> a full language and a subset language. 

You are right that no-one will like this idea.  It's a bad idea. It goes 
directly against the idea of "standard" (singular).  It sends a message 
that we "didn't really mean the coarray stuff", and is no different from 
the Part 2 proposal that was rejected.  For implementors, this would 
offer no meaningful advantage over the option of supporting just 1 
image, which is already allowed with the current, unified text. 


> One caught on and everyone talking of 
> Fortran 77 now means that one. It was done with facing pages specifying the two 
> levels, which would not be practical for Fortran 2008. I think we would need to 
> concatenate the two, which should not a problem in these days of electronic 
> publication. Which of the two is developed further (or neither or both) would 
> depend on their success in the field. If it is just one, that will be what 
> future generations will regard as Fortran 2008.
> My suggestion re 2 is in N1752.
> See you in Tokyo.
> John.
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Bill Long                                   longb at cray.com
Fortran Technical Support    &              voice: 651-605-9024
Bioinformatics Software Development         fax:   651-605-9142
Cray Inc., 1340 Mendota Heights Rd., Mendota Heights, MN, 55120


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