rev_itlist2

Lib.rev_itlist2 : ('a -> 'b -> 'c -> 'c) -> 'a list -> 'b list -> 'c -> 'c

Applies a function to corresponding elements of 2 lists.

rev_itlist2 f [x1,...,xn] [y1,...,yn] z returns

   f xn yn (f xn-1 yn-1 ... (f x1 y1 z)...)

It returns z if both lists are empty.

Failure

Fails if the two lists are of different lengths, or if an application of f raises an exception.

Example

> rev_itlist2 (fn x => fn y => cons (x,y)) [1,2] [3,4] [];
val it = [(2, 4), (1, 3)]: (int * int) list

See also

Lib.itlist, Lib.rev_itlist, Lib.itlist2, Lib.end_itlist