1Hashtbl.HashedType(3)            OCaml library           Hashtbl.HashedType(3)
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NAME

6       Hashtbl.HashedType - The input signature of the functor Hashtbl.Make.
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Module type

9       Module type   Hashtbl.HashedType
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Documentation

12       Module type HashedType
13        = sig end
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16       The input signature of the functor Hashtbl.Make .
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22       type t
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25       The type of the hashtable keys.
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29       val equal : t -> t -> bool
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31       The equality predicate used to compare keys.
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35       val hash : t -> int
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37       A  hashing function on keys. It must be such that if two keys are equal
38       according to equal , then they have identical hash values  as  computed
39       by  hash .  Examples: suitable ( equal , hash ) pairs for arbitrary key
40       types include
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42       -        ( (=) , Hashtbl.hash )  for  comparing  objects  by  structure
43       (provided objects do not contain floats)
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45       -         ( (fun x y -> compare x y = 0) , Hashtbl.hash ) for comparing
46       objects by structure and handling Pervasives.nan correctly
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48       -        ( (==) , Hashtbl.hash )  for  comparing  objects  by  physical
49       equality (e.g. for mutable or cyclic objects).
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56OCamldoc                          2018-07-14             Hashtbl.HashedType(3)