Hashtbl.HashedType(3o) OCaml library Hashtbl.HashedType(3o)
NAME
Hashtbl.HashedType - The input signature of the functor Hashtbl.Make.
Module type
Module type Hashtbl.HashedType
Documentation
Module type HashedType
= sig end
The input signature of the functor Hashtbl.Make .
type t
The type of the hashtable keys.
val equal : t -> t -> bool
The equality predicate used to compare keys.
val hash : t -> int
A hashing function on keys. It must be such that if two keys are equal
according to equal , then they have identical hash values as computed
by hash . Examples: suitable ( equal , hash ) pairs for arbitrary key
types include
- ( (=) , Hashtbl.HashedType.hash ) for comparing objects by
structure (provided objects do not contain floats)
- ( (fun x y -> compare x y = 0) , Hashtbl.HashedType.hash ) for
comparing objects by structure and handling nan correctly
- ( (==) , Hashtbl.HashedType.hash ) for comparing objects by
physical equality (e.g. for mutable or cyclic objects).
OCamldoc 2023-02-12 Hashtbl.HashedType(3o)
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