[MPI3 Fortran] MPI buffer arguments - void and call-by-reference

[N.M. Maclaren]

On Feb 9 2009, Aleksandar Donev wrote:
>On Monday 09 February 2009 14:59, Rolf Rabenseifner wrote:
>
>>     Meaning: Same as what currently done, i.e., call-by-reference
>>     on the caller side, if call-by-reference is possible (i.e.,
>>     not for non-contiguous subarrays)
>
>What if call-by-reference is not possible?
>How is this different from what is currently there and why is it useful 
>enough over what is already there to warrant inclusion in the Fortran 
>standard?

As I teach in my Fortran course, those are not the only two possible
options.  Fortran permits Algol call-by-name (i.e. the mechanism used
for Jensen's device), for example.


Regards,
Nick Maclaren,
University of Cambridge Computing Service,
New Museums Site, Pembroke Street, Cambridge CB2 3QH, England.
Email:  nmm1 at cam.ac.uk
Tel.:  +44 1223 334761    Fax:  +44 1223 334679