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(* $Id$ *)
(* Discrimination nets. *)
type ('lbl,'tree) decompose_fun = 'tree -> ('lbl * 'tree list) option
type ('lbl,'pat,'inf) t (* = (('lbl * int) option,'pat * 'inf) Tlm.t *)
val create : unit -> ('lbl,'pat,'inf) t
(* [add t f (tree,inf)] adds a structured object [tree] together with
the associated information [inf] to the table [t]; the function
[f] is used to translated [tree] into its prefix decomposition: [f]
must decompose any tree into a label characterizing its root node and
the list of its subtree *)
val add : ('lbl,'pat,'inf) t -> ('lbl,'pat) decompose_fun -> 'pat * 'inf
-> ('lbl,'pat,'inf) t
val rmv : ('lbl,'pat,'inf) t -> ('lbl,'pat) decompose_fun -> 'pat * 'inf
-> ('lbl,'pat,'inf) t
(* [lookup t f tree] looks for trees (and their associated
information) in table [t] such that the structured object [tree]
matches against them; [f] is used to translated [tree] into its
prefix decomposition: [f] must decompose any tree into a label
characterizing its root node and the list of its subtree *)
val lookup : ('lbl,'pat,'inf) t -> ('lbl,'term) decompose_fun -> 'term
-> ('pat * 'inf) list
val app : (('pat * 'inf) -> unit) -> ('lbl,'pat,'inf) t -> unit
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