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77 lines
2.4 KiB
OCaml
77 lines
2.4 KiB
OCaml
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(* This file is free software, part of containers. See file "license" for more details. *)
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(** {1 Tuple Functions} *)
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type ('a,'b) t = ('a * 'b)
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val make : 'a -> 'b -> ('a, 'b) t
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(** Make a tuple from its components.
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@since 0.16 *)
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val map1 : ('a -> 'b) -> ('a * 'c) -> ('b * 'c)
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(** [map1 f (x, y)] returns [(f x, y)]. *)
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val map2 : ('a -> 'b) -> ('c * 'a) -> ('c * 'b)
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(** [map2 f (x, y)] returns [(x, f y)]. *)
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val map : ('a -> 'c) -> ('b -> 'd) -> ('a * 'b) -> ('c * 'd)
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(** Synonym to {!( *** )}. Map on both sides of a tuple. *)
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val map_same : ('a -> 'b) -> ('a * 'a) -> ('b * 'b)
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(** Like {!map} but specialized for pairs with elements of the same type. *)
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val map_fst : ('a -> 'b) -> ('a * _) -> 'b
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(** Compose the given function with [fst].
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@since 0.3.3 *)
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val map_snd : ('a -> 'b) -> (_ * 'a) -> 'b
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(** Compose the given function with [snd].
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@since 0.3.3 *)
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val iter : ('a -> 'b -> unit) -> ('a * 'b) -> unit
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val swap : ('a * 'b) -> ('b * 'a)
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(** Swap the components of the tuple. *)
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val (<<<) : ('a -> 'b) -> ('a * 'c) -> ('b * 'c)
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(** Map on the left side of the tuple. *)
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val (>>>) : ('a -> 'b) -> ('c * 'a) -> ('c * 'b)
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(** Map on the right side of the tuple. *)
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val ( *** ) : ('a -> 'c) -> ('b -> 'd) -> ('a * 'b) -> ('c * 'd)
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(** Map on both sides of a tuple. *)
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val ( &&& ) : ('a -> 'b) -> ('a -> 'c) -> 'a -> ('b * 'c)
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(** [f &&& g] is [fun x -> f x, g x]. It splits the computations into
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two parts. *)
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val merge : ('a -> 'b -> 'c) -> ('a * 'b) -> 'c
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(** Uncurrying (merges the two components of a tuple). *)
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val fold : ('a -> 'b -> 'c) -> ('a * 'b) -> 'c
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(** Synonym to {!merge}.
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@since 0.3.3 *)
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val dup : 'a -> ('a * 'a)
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(** [dup x = (x,x)] (duplicate the value).
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@since 0.3.3 *)
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val dup_map : ('a -> 'b) -> 'a -> ('a * 'b)
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(** [dup_map f x = (x, f x)]. Duplicates the value and applies the function
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to the second copy.
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@since 0.3.3 *)
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val equal : ('a -> 'a -> bool) -> ('b -> 'b -> bool) -> ('a * 'b) -> ('a * 'b) -> bool
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val compare : ('a -> 'a -> int) -> ('b -> 'b -> int) -> ('a * 'b) -> ('a * 'b) -> int
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val to_string : ?sep:string -> ('a -> string) -> ('b -> string) -> ('a * 'b) -> string
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(** Print tuple in a string
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@since 2.7 *)
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type 'a printer = Format.formatter -> 'a -> unit
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val pp : ?sep:string -> 'a printer -> 'b printer -> ('a * 'b) printer
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(** Print a pair given an optional separator and a method for printing each of its elements. *)
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