Talk:Multi-dimensional array: Difference between revisions

::::Regarding FORALL, the interpretation is relatively simple, as with other array statements and functions introduced by Fortran 90: never rely on side effects, hence evaluate all right-hand side values before any assignment. This would involve allocating temporary storage and copying in a rigid interpretation of this rule. In many situations, however, the compiler is able to do better than that. FORALL is indeed useful only when the result does not depend on the evaluation order. Anyway, given the ability of modern compilers, I don't regard FORALL as very usueful, but see also [http://stackoverflow.com/questions/8602596/fortran-forall-restrictions here] and [http://stackoverflow.com/questions/4122099/do-fortran-95-constructs-such-as-where-forall-and-spread-generally-result-in-fa here].