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|
(************************************************************************)
(* * The Coq Proof Assistant / The Coq Development Team *)
(* v * INRIA, CNRS and contributors - Copyright 1999-2018 *)
(* <O___,, * (see CREDITS file for the list of authors) *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(* * (see LICENSE file for the text of the license) *)
(************************************************************************)
open Constr
open Mod_subst
(** Dnets on constr terms.
An instantiation of Dnet on (an approximation of) constr. It
associates a term (possibly with Evar) with an
identifier. Identifiers must be unique (no two terms sharing the
same ident), and there must be a way to recover the full term from
the identifier (function constr_of).
Optionally, a pre-treatment on terms can be performed before adding
or searching (reduce). Practically, it is used to do some kind of
delta-reduction on terms before indexing them.
The results returned here are perfect, since post-filtering is done
inside here.
See tactics/dnet.mli for more details.
*)
(** Identifiers to store (right hand side of the association) *)
module type IDENT = sig
type t
val compare : t -> t -> int
(** how to substitute them for storage *)
val subst : substitution -> t -> t
(** how to recover the term from the identifier *)
val constr_of : t -> constr
end
(** Options : *)
module type OPT = sig
(** pre-treatment to terms before adding or searching *)
val reduce : constr -> constr
(** direction of post-filtering w.r.t sort subtyping :
- true means query <= terms in the structure
- false means terms <= query
*)
val direction : bool
end
module type S =
sig
type t
type ident
val empty : t
(** [add c i dn] adds the binding [(c,i)] to [dn]. [c] can be a
closed term or a pattern (with untyped Evars). No Metas accepted *)
val add : constr -> ident -> t -> t
(** merge of dnets. Faster than re-adding all terms *)
val union : t -> t -> t
val subst : substitution -> t -> t
(*
* High-level primitives describing specific search problems
*)
(** [search_pattern dn c] returns all terms/patterns in dn
matching/matched by c *)
val search_pattern : t -> constr -> ident list
(** [find_all dn] returns all idents contained in dn *)
val find_all : t -> ident list
val map : (ident -> ident) -> t -> t
val refresh_metas : t -> t
end
module Make :
functor (Ident : IDENT) ->
functor (Opt : OPT) ->
S with type ident = Ident.t
|
