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package travesty
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Full signature of an arity-0 filter-mappable type.

Functions mapped over arity-0 types must preserve the element type.

include Types_intf.S0
type t

The container type.

type elt

The element type.

include Generic with type 'a t := t and type 'a elt := elt

Generic strictly extends Generic_basic.

include Generic_basic with type 'a t := t with type 'a elt := elt

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 Types_intf.Generic with type 'a t := t with type 'a elt := elt
val filter_map : t -> f:(elt -> elt Base.option) -> t

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

val filter : t -> f:(elt -> Base.bool) -> t

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

val exclude : t -> f:(elt -> Base.bool) -> 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.