On Mar 17, 2008, at 4:05 PM, Aleksandar Donev wrote:
> On Monday 17 March 2008 14:40, Jeff Squyres wrote:
>
>> Craig mentioned last week that if we have these opaque Fortran types
>> (with their contents unspecified), that we could be guaranteed that
>> their first member would be at the first byte of the instance.
Sorry, I don't recall saying that. It's as Aleks says below, the
guarantee is that it will conform to the equivalent C struct for the
companion C compiler. Is
struct foo { int i; }
always equivalent to an int in C? I think the C calling convention
treats them differently enough so that defining an MPI_HANDLE as a
user defined type (essentially a C struct) with one integer component
won't be guaranteed to work. In that case, we need the typealias
Aleks so dearly wants :-) That was before my time on the committee
so I don't have a horse in that race.
Cheers,
Craig
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