[MPI3 Fortran] Summary of items on the table

[Bill Long]

Aleksandar Donev wrote:
> On Monday 28 April 2008 12:51, Bill Long wrote:
>
>   
>> Changing the actual argument to a C_LOC reference also has the side
>> effect of making the actual argument an expression whose value is not a
>> Fortran pointer.  Thus, the corresponding dummy argument cannot be
>> defined.  A problem for about half of the interesting MPI cases.
>>     
> That's a bogus complaint. The actual is a C pointer, and cannot be changed, 
> indeed. But its target can be changed through the pointer, which is exactly 
> the intent here.
>   

The problem is that the Fortran standard supports those semantics only 
for a Fortran pointer, not for a C pointer.  I know it "will work 
anyway",  but that does not mean it is valid.

Cheers,
Bill

> I'll give my "vote" when I have a little more time to think about it...
>
> Best,
> Aleks
>   


-- 
Bill Long                                   longb at cray.com
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