package preface

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package preface
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type 'a t = 'a Core.t

The type held by the Selective.

include Preface_specs.Apply.OPERATION with type 'a t := 'a t
val lift : ('a -> 'b) -> 'a t -> 'b t

Mapping over from 'a to 'b over 'a t to 'b t.

val lift3 : ('a -> 'b -> 'c -> 'd) -> 'a t -> 'b t -> 'c t -> 'd t

Mapping over from 'a and 'b and 'c to 'd over 'a t and 'b t and 'c t to 'd t.

val replace : 'a -> 'b t -> 'a t

Create a new 'a t, replacing all values in the 'b t by given a value of 'a.

val void : 'a t -> unit t

Create a new unit t, replacing all values in the 'a t by unit.

val if_ : bool t -> 'a t -> 'a t -> 'a t

Same of branch but using a Boolean as disjunction.

val bind_bool : bool t -> (bool -> 'a t) -> 'a t

Monad bind specialized for Boolean.

val when_ : bool t -> unit t -> unit t

Conditionally perform an effect.

val exists : ('a -> bool t) -> 'a list -> bool t

Selective version of List.exists.

val for_all : ('a -> bool t) -> 'a list -> bool t

Selective version of List.for_all.

val or_ : bool t -> bool t -> bool t

Or combinator.

val and_ : bool t -> bool t -> bool t

And combinator.

val while_ : bool t -> unit t

Keep checking an effectful condition while it holds.

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