Module type Filter_mappable_types.Generic

Generic output shape of filter-mappable structures on either an arity-0 or arity-1 type.

Generic strictly extends Generic_basic.

include Generic_basic

Generic_basic refers to the container type as 'a t, and the element type as 'a elt; substitute t/elt (arity-0) or 'a t/'a (arity-1) accordingly below.

include Generic_types.Generic
type ('a, 'phantom) t

Placeholder for the container type.

type 'a elt

Placeholder for the type of elements inside the container.

val filter_map : ('a, 'phantom) t -> f:('a elt -> 'b elt Base.option) -> ('b, 'phantom) t

filter_map c ~f maps f over every t in c, discarding any items for which f returns None.

val filter : ('a, 'phantom) t -> f:('a elt -> Base.bool) -> ('a, 'phantom) t

filter c ~f checks f over every t in c, discarding any items for which f returns false.

val exclude : ('a, 'phantom) t -> f:('a elt -> Base.bool) -> ('a, 'phantom) t

exclude c ~f checks f over every t in c, discarding any items for which f returns true.

We can also derive Mappable interfaces from filter-mappable ones, but leave that to a separate functor.