1 (* Copyright (C) 2002, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
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15 * GNU General Public License for more details.
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19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://cs.unibo.it/helm/.
26 let new_meta_of_proof ~proof:(_, metasenv, _, _) =
27 CicMkImplicit.new_meta metasenv []
29 let subst_meta_in_proof proof meta term newmetasenv =
30 let uri,metasenv,bo,ty = proof in
31 (* empty context is ok for term since it wont be used by apply_subst *)
32 let subst_in = CicMetaSubst.apply_subst [meta,([], term)] in
34 newmetasenv @ (List.filter (function (m,_,_) -> m <> meta) metasenv)
38 (function i,canonical_context,ty ->
39 let canonical_context' =
42 Some (n,Cic.Decl s) -> Some (n,Cic.Decl (subst_in s))
43 | Some (n,Cic.Def (s,None)) -> Some (n,Cic.Def ((subst_in s),None))
45 | Some (_,Cic.Def (_,Some _)) -> assert false
48 i,canonical_context',(subst_in ty)
51 let bo' = subst_in bo in
52 (* Metavariables can appear also in the *statement* of the theorem
53 * since the parser does not reject as statements terms with
54 * metavariable therein *)
55 let ty' = subst_in ty in
56 let newproof = uri,metasenv'',bo',ty' in
57 (newproof, metasenv'')
59 (*CSC: commento vecchio *)
60 (* refine_meta_with_brand_new_metasenv meta term subst_in newmetasenv *)
61 (* This (heavy) function must be called when a tactic can instantiate old *)
62 (* metavariables (i.e. existential variables). It substitues the metasenv *)
63 (* of the proof with the result of removing [meta] from the domain of *)
64 (* [newmetasenv]. Then it replaces Cic.Meta [meta] with [term] everywhere *)
65 (* in the current proof. Finally it applies [apply_subst_replacing] to *)
67 (*CSC: A questo punto perche' passare un bo' gia' istantiato, se tanto poi *)
68 (*CSC: ci ripasso sopra apply_subst!!! *)
69 (*CSC: Attenzione! Ora questa funzione applica anche [subst_in] a *)
70 (*CSC: [newmetasenv]. *)
71 let subst_meta_and_metasenv_in_proof proof meta subst_in newmetasenv =
72 let (uri,_,bo,ty) = proof in
73 let bo' = subst_in bo in
74 (* Metavariables can appear also in the *statement* of the theorem
75 * since the parser does not reject as statements terms with
76 * metavariable therein *)
77 let ty' = subst_in ty in
80 (fun metasenv_entry i ->
81 match metasenv_entry with
82 (m,canonical_context,ty) when m <> meta ->
83 let canonical_context' =
87 | Some (i,Cic.Decl t) -> Some (i,Cic.Decl (subst_in t))
88 | Some (i,Cic.Def (t,None)) ->
89 Some (i,Cic.Def ((subst_in t),None))
90 | Some (_,Cic.Def (_,Some _)) -> assert false
93 (m,canonical_context',subst_in ty)::i
97 let newproof = uri,metasenv',bo',ty' in
100 let compare_metasenvs ~oldmetasenv ~newmetasenv =
101 List.map (function (i,_,_) -> i)
104 not (List.exists (fun (j,_,_) -> i=j) oldmetasenv)) newmetasenv)