Module `CCPair`

Tuple Functions

type ('a, 'b) t = 'a * 'b

val make : 'a -> 'b -> ('a, 'b) t

Make a tuple from its components.

since: 0.16

val map1 : ('a -> 'b) -> ('a * 'c) -> 'b * 'c: map1 f (x, y) returns (f x, y).

val map2 : ('a -> 'b) -> ('c * 'a) -> 'c * 'b: map2 f (x, y) returns (x, f y).

val map : ('a -> 'c) -> ('b -> 'd) -> ('a * 'b) -> 'c * 'd: Synonym to ( *** ). Map on both sides of a tuple.

val map_same : ('a -> 'b) -> ('a * 'a) -> 'b * 'b: Like map but specialized for pairs with elements of the same type.

val map_fst : ('a -> 'b) -> ('a * _) -> 'b

Compose the given function with fst.

since: 0.3.3

val map_snd : ('a -> 'b) -> (_ * 'a) -> 'b

Compose the given function with snd.

since: 0.3.3

val iter : ('a -> 'b -> unit) -> ('a * 'b) -> unit
val swap : ('a * 'b) -> 'b * 'a: Swap the components of the tuple.

val (<<<) : ('a -> 'b) -> ('a * 'c) -> 'b * 'c: Map on the left side of the tuple.

val (>>>) : ('a -> 'b) -> ('c * 'a) -> 'c * 'b: Map on the right side of the tuple.

val (***) : ('a -> 'c) -> ('b -> 'd) -> ('a * 'b) -> 'c * 'd: Map on both sides of a tuple.

val (&&&) : ('a -> 'b) -> ('a -> 'c) -> 'a -> 'b * 'c: f &&& g is fun x -> f x, g x. It splits the computations into two parts.

val merge : ('a -> 'b -> 'c) -> ('a * 'b) -> 'c: Uncurrying (merges the two components of a tuple).

val fold : ('a -> 'b -> 'c) -> ('a * 'b) -> 'c

Synonym to merge.

since: 0.3.3

val dup : 'a -> 'a * 'a

dup x = (x,x) (duplicate the value).

since: 0.3.3

val dup_map : ('a -> 'b) -> 'a -> 'a * 'b

dup_map f x = (x, f x). Duplicates the value and applies the function to the second copy.

since: 0.3.3

val equal : ('a -> 'a -> bool) -> ('b -> 'b -> bool) -> ('a * 'b) -> ('a * 'b) -> bool
val compare : ('a -> 'a -> int) -> ('b -> 'b -> int) -> ('a * 'b) -> ('a * 'b) -> int

type 'a printer = Stdlib.Format.formatter -> 'a -> unit

val pp : ?⁠sep:string -> 'a printer -> 'b printer -> ('a * 'b) printer: Print a pair given an optional separator and a method for printing each of its elements.