CentOS 7.0 - man page for hashtbl.hashedtype (centos section 3)
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Hashtbl.HashedType(3) OCaml library Hashtbl.HashedType(3)
Hashtbl.HashedType - The input signature of the functor Hashtbl.Make.
Module type Hashtbl.HashedType
Module type HashedType
= sig end
The input signature of the functor Hashtbl.Make .
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.hash ) for comparing objects by structure (provided objects do
not contain floats)
- ( (fun x y -> compare x y = 0) , Hashtbl.hash ) for comparing objects by struc-
ture and handling Pervasives.nan correctly
- ( (==) , Hashtbl.hash ) for comparing objects by physical equality (e.g. for
mutable or cyclic objects).
OCamldoc 2014-06-09 Hashtbl.HashedType(3)
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