X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Focaml%2Fparamodulation%2Finference.mli;h=55f3df414aa7949e0f8c7bc08cb368da216d7d4a;hb=4167cea65ca58897d1a3dbb81ff95de5074700cc;hp=5ced528bb81055550961d65e489068bded9c49cf;hpb=bdc855b1b6c9552a49a01769cb906a438ca60cc4;p=helm.git diff --git a/helm/ocaml/paramodulation/inference.mli b/helm/ocaml/paramodulation/inference.mli index 5ced528bb..55f3df414 100644 --- a/helm/ocaml/paramodulation/inference.mli +++ b/helm/ocaml/paramodulation/inference.mli @@ -1,32 +1,73 @@ +(* Copyright (C) 2005, HELM Team. + * + * This file is part of HELM, an Hypertextual, Electronic + * Library of Mathematics, developed at the Computer Science + * Department, University of Bologna, Italy. + * + * HELM is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * HELM is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with HELM; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, + * MA 02111-1307, USA. + * + * For details, see the HELM World-Wide-Web page, + * http://cs.unibo.it/helm/. + *) + type equality = - Cic.term * (* proof *) + int * (* weight *) + proof * (* proof *) (Cic.term * (* type *) Cic.term * (* left side *) Cic.term * (* right side *) Utils.comparison) * (* ordering *) Cic.metasenv * (* environment for metas *) Cic.term list (* arguments *) -;; -type environment = Cic.metasenv * Cic.context * CicUniv.universe_graph;; +and proof = + | NoProof + | BasicProof of Cic.term (* already a proof of a goal *) + | ProofBlock of (* proof of a rewrite step *) + Cic.substitution * UriManager.uri * (* eq_ind or eq_ind_r *) + (Cic.name * Cic.term) * Cic.term * (Utils.pos * equality) * proof + | ProofGoalBlock of proof * proof + (* proof of the new meta, proof of the goal from which this comes *) + | ProofSymBlock of Cic.term list * proof (* expl.named subst, proof *) + | SubProof of Cic.term * int * proof + (* parent proof, subgoal, proof of the subgoal *) + +type environment = Cic.metasenv * Cic.context * CicUniv.universe_graph + +(** builds the Cic.term encoded by proof *) +val build_proof_term: proof -> Cic.term +val string_of_proof: proof -> string exception MatchingFailure +(** matching between two terms. Can raise MatchingFailure *) val matching: Cic.metasenv -> Cic.context -> Cic.term -> Cic.term -> CicUniv.universe_graph -> Cic.substitution * Cic.metasenv * CicUniv.universe_graph - (** - Performs the beta expansion of the term "where" w.r.t. "what", - i.e. returns the list of all the terms t s.t. "(t what) = where". + special unification that checks if the two terms are "simple", and in + such case should be significantly faster than CicUnification.fo_unif *) -val beta_expand: - ?metas_ok:bool -> ?match_only:bool -> Cic.term -> Cic.term -> Cic.term -> - Cic.context -> Cic.metasenv -> CicUniv.universe_graph -> - (Cic.term * Cic.substitution * Cic.metasenv * CicUniv.universe_graph) list +val unification: + Cic.metasenv -> Cic.context -> Cic.term -> Cic.term -> + CicUniv.universe_graph -> + Cic.substitution * Cic.metasenv * CicUniv.universe_graph (** @@ -36,49 +77,52 @@ val beta_expand: fresh metas... *) val find_equalities: - ?eq_uri:UriManager.uri -> Cic.context -> ProofEngineTypes.proof -> - equality list * int - + Cic.context -> ProofEngineTypes.proof -> int list * equality list * int -exception TermIsNotAnEquality;; +(** + searches the library for equalities that can be applied to the current goal +*) +val find_library_equalities: + HMysql.dbd -> Cic.context -> ProofEngineTypes.status -> int -> + UriManager.UriSet.t * (UriManager.uri * equality) list * int (** - raises TermIsNotAnEquality if term is not an equation. - The first Cic.term is a proof of the equation + searches the library for theorems that are not equalities (returned by the + function above) *) -val equality_of_term: ?eq_uri:UriManager.uri -> Cic.term -> Cic.term -> - equality +val find_library_theorems: + HMysql.dbd -> environment -> ProofEngineTypes.status -> UriManager.UriSet.t -> + (Cic.term * Cic.term * Cic.metasenv) list (** - superposition_left env target source - returns a list of new clauses inferred with a left superposition step - the negative equation "target" and the positive equation "source" + searches the context for hypotheses that are not equalities *) -val superposition_left: environment -> equality -> equality -> equality list +val find_context_hypotheses: + environment -> int list -> (Cic.term * Cic.term * Cic.metasenv) list + + +exception TermIsNotAnEquality;; (** - superposition_right newmeta env target source - returns a list of new clauses inferred with a right superposition step - the positive equations "target" and "source" - "newmeta" is the first free meta index, i.e. the first number above the - highest meta index: its updated value is also returned + raises TermIsNotAnEquality if term is not an equation. + The first Cic.term is a proof of the equation *) -val superposition_right: - int -> environment -> equality -> equality -> int * equality list +val equality_of_term: Cic.term -> Cic.term -> equality + +val term_is_equality: Cic.term -> bool -val demodulation: int -> environment -> equality -> equality -> int * equality +(** tests a sort of alpha-convertibility between the two terms, but on the + metavariables *) +val meta_convertibility: Cic.term -> Cic.term -> bool +(** meta convertibility between two equations *) val meta_convertibility_eq: equality -> equality -> bool val is_identity: environment -> equality -> bool val string_of_equality: ?env:environment -> equality -> string -val subsumption: environment -> equality -> equality -> bool - val metas_of_term: Cic.term -> int list +(** ensures that metavariables in equality are unique *) val fix_metas: int -> equality -> int * equality - -val extract_differing_subterms: - Cic.term -> Cic.term -> (Cic.term * Cic.term) option