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-(************************************************************************)
-(* v * The Coq Proof Assistant / The Coq Development Team *)
-(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2016 *)
-(* \VV/ **************************************************************)
-(* // * This file is distributed under the terms of the *)
-(* * GNU Lesser General Public License Version 2.1 *)
-(************************************************************************)
-
-open Util
-open Errors
-open Evar_refiner
-open Tacmach
-open Tacexpr
-open Refiner
-open Evd
-open Locus
-
-(* The instantiate tactic *)
-
-let instantiate_evar evk (ist,rawc) sigma =
- let evi = Evd.find sigma evk in
- let filtered = Evd.evar_filtered_env evi in
- let constrvars = Tacinterp.extract_ltac_constr_values ist filtered in
- let lvar = {
- Pretyping.ltac_constrs = constrvars;
- ltac_uconstrs = Names.Id.Map.empty;
- ltac_idents = Names.Id.Map.empty;
- ltac_genargs = ist.Geninterp.lfun;
- } in
- let sigma' = w_refine (evk,evi) (lvar ,rawc) sigma in
- tclEVARS sigma'
-
-let instantiate_tac n c ido =
- Proofview.V82.tactic begin fun gl ->
- let sigma = gl.sigma in
- let evl =
- match ido with
- ConclLocation () -> evar_list (pf_concl gl)
- | HypLocation (id,hloc) ->
- let decl = Environ.lookup_named_val id (Goal.V82.hyps sigma (sig_it gl)) in
- match hloc with
- InHyp ->
- (match decl with
- (_,None,typ) -> evar_list typ
- | _ -> error
- "Please be more specific: in type or value?")
- | InHypTypeOnly ->
- let (_, _, typ) = decl in evar_list typ
- | InHypValueOnly ->
- (match decl with
- (_,Some body,_) -> evar_list body
- | _ -> error "Not a defined hypothesis.") in
- if List.length evl < n then
- error "Not enough uninstantiated existential variables.";
- if n <= 0 then error "Incorrect existential variable index.";
- let evk,_ = List.nth evl (n-1) in
- instantiate_evar evk c sigma gl
- end
-
-let instantiate_tac_by_name id c =
- Proofview.V82.tactic begin fun gl ->
- let sigma = gl.sigma in
- let evk =
- try Evd.evar_key id sigma
- with Not_found -> error "Unknown existential variable." in
- instantiate_evar evk c sigma gl
- end
-
-let let_evar name typ =
- let src = (Loc.ghost,Evar_kinds.GoalEvar) in
- Proofview.Goal.enter begin fun gl ->
- let sigma = Proofview.Goal.sigma gl in
- let env = Proofview.Goal.env gl in
- let id = match name with
- | Names.Anonymous ->
- let id = Namegen.id_of_name_using_hdchar env typ name in
- Namegen.next_ident_away_in_goal id (Termops.ids_of_named_context (Environ.named_context env))
- | Names.Name id -> id in
- let sigma',evar = Evarutil.new_evar env sigma ~src ~naming:(Misctypes.IntroFresh id) typ in
- Tacticals.New.tclTHEN (Proofview.V82.tactic (Refiner.tclEVARS sigma'))
- (Tactics.letin_tac None (Names.Name id) evar None Locusops.nowhere)
- end