(j3.2006) Question about co-arrays
Wed Feb 7 13:05:07 EST 2007
In addition to what John said, to address specifically:
> In light of Note 5.10 [91:8+1-3]
The difference between a co-array of a derived types with pointer components
and of type C_PTR is that the user can do something useful with pointer
components, specifically, they can have data-refs of the form:
and the compiler knows, from the reference, that this is remote data, and will
do the magic to get it.
On the other hand, there is nothing useful that can be done with a C pointer
x[i], since C does not understand co-arrays and cannot fetch data from remote
images. We specifically disallow such co-indexed pointers in C_LOC and
C_F_POINTER because it makes no sense to claim interop for something that is
not even part of the C standard.
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