Usually (F90 permits overloading), F90's array operations apply the same operation to each element of an array, and cannot process arrays which aren't conformal (same organization), so F90's array operation A = B * C would be the equivalent to

real,dimension(2,3,4) :: A, B, C
integer j, k, m

do j = 1, 2
  do k = 1, 3
     do m = 1, 4

         A(j,k,m) = B(j,k,m) * C(j,k,m)
     
     enddo
  enddo
enddo

[download]

Of course, Fortran programmers like typing no more than any other type of programmer1, so A = B * C would be preferred ;-).

I'm not saying that the F90 way is optimal; it's just that the philosophy behind the F90 standard is to make parallelization transparent to the application programmer, which means that having a different syntax for parallel operations would be frowned upon. Certainly, some of Perl's existing syntax (grep, many list operations) could be parallelized without any visible changes to the language.

1 Well, maybe COBOL programmers like typing, but I wouldn't want to stereotype them.

Information about American English usage here and here. Floating point issues? Please read this before posting. — emc

In reply to Re^5: Multi-core and the future by swampyankee
in thread Multi-core and the future by pileofrogs

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