diff options
Diffstat (limited to 'lib/hashtbl_alt.ml')
| -rw-r--r-- | lib/hashtbl_alt.ml | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/lib/hashtbl_alt.ml b/lib/hashtbl_alt.ml index 667f4f719..e6843174a 100644 --- a/lib/hashtbl_alt.ml +++ b/lib/hashtbl_alt.ml @@ -29,10 +29,6 @@ module type S = sig [constr] is stored in [H] and will be used as the canonical representation of this value in the future. *) val may_add_and_get : int -> elt -> elt - val combine : int -> int -> int - val combinesmall : int -> int -> int - val combine3 : int -> int -> int -> int - val combine4 : int -> int -> int -> int -> int end module Make (E : Hashtype) = @@ -96,6 +92,9 @@ module Make (E : Hashtype) = if hash == h2 && E.equals key k3 then k3 else find_rec hash key rest3 +end + +module Combine = struct (* These are helper functions to combine the hash keys in a similar way as [Hashtbl.hash] does. The constants [alpha] and [beta] must be prime numbers. There were chosen empirically. Notice that the @@ -107,5 +106,4 @@ module Make (E : Hashtype) = let combine3 x y z = combine x (combine y z) let combine4 x y z t = combine x (combine3 y z t) let combinesmall x y = beta * x + y - end |