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package containers
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Persistent hash-table on top of OCaml's hashtables

Almost as efficient as the regular Hashtbl type, but with a persistent interface (rewinding changes to get back in the past history). This is mostly useful for backtracking-like uses, or forward uses (never using old values).

This module is not thread-safe.

type 'a sequence = ('a -> unit) -> unit
type 'a printer = Format.formatter -> 'a -> unit
type 'a equal = 'a -> 'a -> bool
module type HashedType = sig ... end

Signature of such a hashtable

module type S = sig ... end

Implementation

module Make (H : HashedType) : S with type key = H.t