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(** {1 Equality Combinators} *)
type 'a t = 'a -> 'a -> bool
let poly = Stdlib.( = )
let physical = Stdlib.( == )
let int : int t = ( = )
let string : string t = Stdlib.( = )
let bool : bool t = Stdlib.( = )
let float : float t = Stdlib.( = )
let unit () () = true
let rec list f l1 l2 =
match l1, l2 with
| [], [] -> true
| [], _ | _, [] -> false
| x1 :: l1', x2 :: l2' -> f x1 x2 && list f l1' l2'
let array eq a b =
let rec aux i =
if i = Array.length a then
true
else
eq a.(i) b.(i) && aux (i + 1)
in
Array.length a = Array.length b && aux 0
let option f o1 o2 =
match o1, o2 with
| None, None -> true
| Some _, None | None, Some _ -> false
| Some x, Some y -> f x y
let pair f g (x1, y1) (x2, y2) = f x1 x2 && g y1 y2
let triple f g h (x1, y1, z1) (x2, y2, z2) = f x1 x2 && g y1 y2 && h z1 z2
let map f eq x y = eq (f x) (f y)
let always_eq _ _ = true
let never_eq _ _ = false
module Infix = struct
let ( >|= ) x f = map f x
end
include Infix