Sourceval map : ('a -> ('b, 'c) result) -> 'a list -> ('b list, 'c) t Sourceval concat_map : 'a list -> ('a -> ('b list, 'c) result) -> ('b list, 'c) t Sourceval iter : ('a -> (unit, 'b) result) -> 'a list -> (unit, 'b) t Sourceval fold_left : ('a -> 'b -> ('a, 'c) result) -> 'a -> 'b list -> ('a, 'c) t Sourceval iter_left : ('a -> (unit, 'b) result) -> 'a list -> (unit, 'b) t