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Subject: Re: (j3.2006) (SC22WG5.5233) [ukfortran]   Ballot on draft DTS
From: Van Snyder <Van.Snyder@jpl.nasa.gov>
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>On Apr 15, 2014, at 12:35 AM, Malcolm Cohen <malcolm@nag-j.co.jp> wrote:
>> 
>> In particular, (1) the collectives CO MAX, CO MIN, CO REDUCE, CO SUM, 
>> should be split into two forms, one with RESULT, one without. The one 
>> with RESULT should have SOURCE as INTENT(IN), the one without should 
>> have SOURCE as INTENT(INOUT). RESULT must not be optional. The SOURCE 
>> INTENT(IN) form should have no coarray restrictions on SOURCE.

The interfaces would be

CO_MAX ( SOURCE, RESULT [, RESULT_IMAGE, STAT, ERRMSG ] )

and

CO_MAX ( SOURCE [, RESULT_IMAGE, STAT, ERRMSG ] )

Can this work in the case that SOURCE is integer?

If you CALL CO_MAX ( I, J, K ), which one is it?

is it CALL CO_MAX ( SOURCE=I, RESULT=J, RESULT_IMAGE=K )

or CALL CO_MAX ( SOURCE=I, RESULT_IMAGE=J, STAT=K )

If the interfaces were

CO_MAX ( SOURCE, RESULT [, ERRMSG, RESULT_IMAGE, STAT ] )

and

CO_MAX ( SOURCE [, ERRMSG, RESULT_IMAGE, STAT, ERRMSG ] )

generic resolution would work, but it feels a bit weird to put ERRMSG
before RESULT_IMAGE.