--- /dev/null
+(* Copyright (C) 2002, 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/.
+ *)
+
+(* $Id$ *)
+
+open ProofEngineHelpers
+open ProofEngineTypes
+
+exception TheTypeOfTheCurrentGoalIsAMetaICannotChooseTheRightElimiantionPrinciple
+exception NotAnInductiveTypeToEliminate
+exception WrongUriToVariable of string
+
+(* lambda_abstract newmeta ty *)
+(* returns a triple [bo],[context],[ty'] where *)
+(* [ty] = Pi/LetIn [context].[ty'] ([context] is a vector!) *)
+(* and [bo] = Lambda/LetIn [context].(Meta [newmeta]) *)
+(* So, lambda_abstract is the core of the implementation of *)
+(* the Intros tactic. *)
+(* howmany = -1 means Intros, howmany > 0 means Intros n *)
+let lambda_abstract ?(howmany=(-1)) metasenv context newmeta ty mk_fresh_name =
+ let module C = Cic in
+ let rec collect_context context howmany ty =
+ match howmany with
+ | 0 ->
+ let irl =
+ CicMkImplicit.identity_relocation_list_for_metavariable context
+ in
+ context, ty, (C.Meta (newmeta,irl))
+ | _ ->
+ match ty with
+ C.Cast (te,_) -> collect_context context howmany te
+ | C.Prod (n,s,t) ->
+ let n' = mk_fresh_name metasenv context n ~typ:s in
+ let (context',ty,bo) =
+ collect_context ((Some (n',(C.Decl s)))::context) (howmany - 1) t
+ in
+ (context',ty,C.Lambda(n',s,bo))
+ | C.LetIn (n,s,t) ->
+ let (context',ty,bo) =
+ collect_context ((Some (n,(C.Def (s,None))))::context) (howmany - 1) t
+ in
+ (context',ty,C.LetIn(n,s,bo))
+ | _ as t ->
+ if howmany <= 0 then
+ let irl =
+ CicMkImplicit.identity_relocation_list_for_metavariable context
+ in
+ context, t, (C.Meta (newmeta,irl))
+ else
+ raise (Fail (lazy "intro(s): not enough products or let-ins"))
+ in
+ collect_context context howmany ty
+
+let eta_expand metasenv context t arg =
+ let module T = CicTypeChecker in
+ let module S = CicSubstitution in
+ let module C = Cic in
+ let rec aux n =
+ function
+ t' when t' = S.lift n arg -> C.Rel (1 + n)
+ | C.Rel m -> if m <= n then C.Rel m else C.Rel (m+1)
+ | C.Var (uri,exp_named_subst) ->
+ let exp_named_subst' = aux_exp_named_subst n exp_named_subst in
+ C.Var (uri,exp_named_subst')
+ | C.Meta (i,l) ->
+ let l' =
+ List.map (function None -> None | Some t -> Some (aux n t)) l
+ in
+ C.Meta (i, l')
+ | C.Sort _
+ | C.Implicit _ as t -> t
+ | C.Cast (te,ty) -> C.Cast (aux n te, aux n ty)
+ | C.Prod (nn,s,t) -> C.Prod (nn, aux n s, aux (n+1) t)
+ | C.Lambda (nn,s,t) -> C.Lambda (nn, aux n s, aux (n+1) t)
+ | C.LetIn (nn,s,t) -> C.LetIn (nn, aux n s, aux (n+1) t)
+ | C.Appl l -> C.Appl (List.map (aux n) l)
+ | C.Const (uri,exp_named_subst) ->
+ let exp_named_subst' = aux_exp_named_subst n exp_named_subst in
+ C.Const (uri,exp_named_subst')
+ | C.MutInd (uri,i,exp_named_subst) ->
+ let exp_named_subst' = aux_exp_named_subst n exp_named_subst in
+ C.MutInd (uri,i,exp_named_subst')
+ | C.MutConstruct (uri,i,j,exp_named_subst) ->
+ let exp_named_subst' = aux_exp_named_subst n exp_named_subst in
+ C.MutConstruct (uri,i,j,exp_named_subst')
+ | C.MutCase (sp,i,outt,t,pl) ->
+ C.MutCase (sp,i,aux n outt, aux n t,
+ List.map (aux n) pl)
+ | C.Fix (i,fl) ->
+ let tylen = List.length fl in
+ let substitutedfl =
+ List.map
+ (fun (name,i,ty,bo) -> (name, i, aux n ty, aux (n+tylen) bo))
+ fl
+ in
+ C.Fix (i, substitutedfl)
+ | C.CoFix (i,fl) ->
+ let tylen = List.length fl in
+ let substitutedfl =
+ List.map
+ (fun (name,ty,bo) -> (name, aux n ty, aux (n+tylen) bo))
+ fl
+ in
+ C.CoFix (i, substitutedfl)
+ and aux_exp_named_subst n =
+ List.map (function uri,t -> uri,aux n t)
+ in
+ let argty,_ =
+ T.type_of_aux' metasenv context arg CicUniv.empty_ugraph (* TASSI: FIXME *)
+ in
+ let fresh_name =
+ FreshNamesGenerator.mk_fresh_name ~subst:[]
+ metasenv context (Cic.Name "Heta") ~typ:argty
+ in
+ (C.Appl [C.Lambda (fresh_name,argty,aux 0 t) ; arg])
+
+(*CSC: ma serve solamente la prima delle new_uninst e l'unione delle due!!! *)
+let classify_metas newmeta in_subst_domain subst_in metasenv =
+ List.fold_right
+ (fun (i,canonical_context,ty) (old_uninst,new_uninst) ->
+ if in_subst_domain i then
+ old_uninst,new_uninst
+ else
+ let ty' = subst_in canonical_context ty in
+ let canonical_context' =
+ List.fold_right
+ (fun entry canonical_context' ->
+ let entry' =
+ match entry with
+ Some (n,Cic.Decl s) ->
+ Some (n,Cic.Decl (subst_in canonical_context' s))
+ | Some (n,Cic.Def (s,None)) ->
+ Some (n,Cic.Def ((subst_in canonical_context' s),None))
+ | None -> None
+ | Some (n,Cic.Def (bo,Some ty)) ->
+ Some
+ (n,
+ Cic.Def
+ (subst_in canonical_context' bo,
+ Some (subst_in canonical_context' ty)))
+ in
+ entry'::canonical_context'
+ ) canonical_context []
+ in
+ if i < newmeta then
+ ((i,canonical_context',ty')::old_uninst),new_uninst
+ else
+ old_uninst,((i,canonical_context',ty')::new_uninst)
+ ) metasenv ([],[])
+
+(* Useful only inside apply_tac *)
+let
+ generalize_exp_named_subst_with_fresh_metas context newmeta uri exp_named_subst
+=
+ let module C = Cic in
+ let params =
+ let o,_ = CicEnvironment.get_obj CicUniv.empty_ugraph uri in
+ CicUtil.params_of_obj o
+ in
+ let exp_named_subst_diff,new_fresh_meta,newmetasenvfragment,exp_named_subst'=
+ let next_fresh_meta = ref newmeta in
+ let newmetasenvfragment = ref [] in
+ let exp_named_subst_diff = ref [] in
+ let rec aux =
+ function
+ [],[] -> []
+ | uri::tl,[] ->
+ let ty =
+ let o,_ = CicEnvironment.get_obj CicUniv.empty_ugraph uri in
+ match o with
+ C.Variable (_,_,ty,_,_) ->
+ CicSubstitution.subst_vars !exp_named_subst_diff ty
+ | _ -> raise (WrongUriToVariable (UriManager.string_of_uri uri))
+ in
+(* CSC: patch to generate ?1 : ?2 : Type in place of ?1 : Type to simulate ?1 :< Type
+ (match ty with
+ C.Sort (C.Type _) as s -> (* TASSI: ?? *)
+ let fresh_meta = !next_fresh_meta in
+ let fresh_meta' = fresh_meta + 1 in
+ next_fresh_meta := !next_fresh_meta + 2 ;
+ let subst_item = uri,C.Meta (fresh_meta',[]) in
+ newmetasenvfragment :=
+ (fresh_meta,[],C.Sort (C.Type (CicUniv.fresh()))) ::
+ (* TASSI: ?? *)
+ (fresh_meta',[],C.Meta (fresh_meta,[])) :: !newmetasenvfragment ;
+ exp_named_subst_diff := !exp_named_subst_diff @ [subst_item] ;
+ subst_item::(aux (tl,[]))
+ | _ ->
+*)
+ let irl =
+ CicMkImplicit.identity_relocation_list_for_metavariable context
+ in
+ let subst_item = uri,C.Meta (!next_fresh_meta,irl) in
+ newmetasenvfragment :=
+ (!next_fresh_meta,context,ty)::!newmetasenvfragment ;
+ exp_named_subst_diff := !exp_named_subst_diff @ [subst_item] ;
+ incr next_fresh_meta ;
+ subst_item::(aux (tl,[]))(*)*)
+ | uri::tl1,((uri',_) as s)::tl2 ->
+ assert (UriManager.eq uri uri') ;
+ s::(aux (tl1,tl2))
+ | [],_ -> assert false
+ in
+ let exp_named_subst' = aux (params,exp_named_subst) in
+ !exp_named_subst_diff,!next_fresh_meta,
+ List.rev !newmetasenvfragment, exp_named_subst'
+ in
+ new_fresh_meta,newmetasenvfragment,exp_named_subst',exp_named_subst_diff
+;;
+
+let new_metasenv_and_unify_and_t newmeta' metasenv' context term' ty termty goal_arity =
+ let (consthead,newmetasenv,arguments,_) =
+ saturate_term newmeta' metasenv' context termty goal_arity in
+ let subst,newmetasenv',_ =
+ CicUnification.fo_unif newmetasenv context consthead ty CicUniv.empty_ugraph
+ in
+ let t =
+ if List.length arguments = 0 then term' else Cic.Appl (term'::arguments)
+ in
+ subst,newmetasenv',t
+
+let rec count_prods context ty =
+ match CicReduction.whd context ty with
+ Cic.Prod (n,s,t) -> 1 + count_prods (Some (n,Cic.Decl s)::context) t
+ | _ -> 0
+
+let apply_tac_verbose_with_subst ~term (proof, goal) =
+ (* Assumption: The term "term" must be closed in the current context *)
+ let module T = CicTypeChecker in
+ let module R = CicReduction in
+ let module C = Cic in
+ let (_,metasenv,_,_) = proof in
+ let metano,context,ty = CicUtil.lookup_meta goal metasenv in
+ let newmeta = new_meta_of_proof ~proof in
+ let exp_named_subst_diff,newmeta',newmetasenvfragment,term' =
+ match term with
+ C.Var (uri,exp_named_subst) ->
+ let newmeta',newmetasenvfragment,exp_named_subst',exp_named_subst_diff =
+ generalize_exp_named_subst_with_fresh_metas context newmeta uri
+ exp_named_subst
+ in
+ exp_named_subst_diff,newmeta',newmetasenvfragment,
+ C.Var (uri,exp_named_subst')
+ | C.Const (uri,exp_named_subst) ->
+ let newmeta',newmetasenvfragment,exp_named_subst',exp_named_subst_diff =
+ generalize_exp_named_subst_with_fresh_metas context newmeta uri
+ exp_named_subst
+ in
+ exp_named_subst_diff,newmeta',newmetasenvfragment,
+ C.Const (uri,exp_named_subst')
+ | C.MutInd (uri,tyno,exp_named_subst) ->
+ let newmeta',newmetasenvfragment,exp_named_subst',exp_named_subst_diff =
+ generalize_exp_named_subst_with_fresh_metas context newmeta uri
+ exp_named_subst
+ in
+ exp_named_subst_diff,newmeta',newmetasenvfragment,
+ C.MutInd (uri,tyno,exp_named_subst')
+ | C.MutConstruct (uri,tyno,consno,exp_named_subst) ->
+ let newmeta',newmetasenvfragment,exp_named_subst',exp_named_subst_diff =
+ generalize_exp_named_subst_with_fresh_metas context newmeta uri
+ exp_named_subst
+ in
+ exp_named_subst_diff,newmeta',newmetasenvfragment,
+ C.MutConstruct (uri,tyno,consno,exp_named_subst')
+ | _ -> [],newmeta,[],term
+ in
+ let metasenv' = metasenv@newmetasenvfragment in
+ let termty,_ =
+ CicTypeChecker.type_of_aux' metasenv' context term' CicUniv.empty_ugraph
+ in
+ let termty =
+ CicSubstitution.subst_vars exp_named_subst_diff termty in
+ let goal_arity = count_prods context ty in
+ let subst,newmetasenv',t =
+ let rec add_one_argument n =
+ try
+ new_metasenv_and_unify_and_t newmeta' metasenv' context term' ty
+ termty n
+ with CicUnification.UnificationFailure _ when n > 0 ->
+ add_one_argument (n - 1)
+ in
+ add_one_argument goal_arity
+ in
+ let in_subst_domain i = List.exists (function (j,_) -> i=j) subst in
+ let apply_subst = CicMetaSubst.apply_subst subst in
+ let old_uninstantiatedmetas,new_uninstantiatedmetas =
+ (* subst_in doesn't need the context. Hence the underscore. *)
+ let subst_in _ = CicMetaSubst.apply_subst subst in
+ classify_metas newmeta in_subst_domain subst_in newmetasenv'
+ in
+ let bo' = apply_subst t in
+ let newmetasenv'' = new_uninstantiatedmetas@old_uninstantiatedmetas in
+ let subst_in =
+ (* if we just apply the subtitution, the type is irrelevant:
+ we may use Implicit, since it will be dropped *)
+ CicMetaSubst.apply_subst ((metano,(context,bo',Cic.Implicit None))::subst)
+ in
+ let (newproof, newmetasenv''') =
+ subst_meta_and_metasenv_in_proof proof metano subst_in newmetasenv''
+ in
+ (((metano,(context,bo',Cic.Implicit None))::subst)(* subst_in *), (* ALB *)
+ (newproof,
+ List.map (function (i,_,_) -> i) new_uninstantiatedmetas))
+
+
+(* ALB *)
+let apply_tac_verbose_with_subst ~term status =
+ try
+(* apply_tac_verbose ~term status *)
+ apply_tac_verbose_with_subst ~term status
+ (* TODO cacciare anche altre eccezioni? *)
+ with
+ | CicUnification.UnificationFailure msg
+ | CicTypeChecker.TypeCheckerFailure msg ->
+ raise (Fail msg)
+
+(* ALB *)
+let apply_tac_verbose ~term status =
+ let subst, status = apply_tac_verbose_with_subst ~term status in
+ (CicMetaSubst.apply_subst subst), status
+
+let apply_tac ~term status = snd (apply_tac_verbose ~term status)
+
+ (* TODO per implementare i tatticali e' necessario che tutte le tattiche
+ sollevino _solamente_ Fail *)
+let apply_tac ~term =
+ let apply_tac ~term status =
+ try
+ apply_tac ~term status
+ (* TODO cacciare anche altre eccezioni? *)
+ with
+ | CicUnification.UnificationFailure msg
+ | CicTypeChecker.TypeCheckerFailure msg ->
+ raise (Fail msg)
+ in
+ mk_tactic (apply_tac ~term)
+
+let intros_tac ?howmany ?(mk_fresh_name_callback = FreshNamesGenerator.mk_fresh_name ~subst:[]) ()=
+ let intros_tac
+ ?(mk_fresh_name_callback = (FreshNamesGenerator.mk_fresh_name ~subst:[])) ()
+ (proof, goal)
+ =
+ let module C = Cic in
+ let module R = CicReduction in
+ let (_,metasenv,_,_) = proof in
+ let metano,context,ty = CicUtil.lookup_meta goal metasenv in
+ let newmeta = new_meta_of_proof ~proof in
+ let (context',ty',bo') =
+ lambda_abstract ?howmany metasenv context newmeta ty mk_fresh_name_callback
+ in
+ let (newproof, _) =
+ subst_meta_in_proof proof metano bo' [newmeta,context',ty']
+ in
+ (newproof, [newmeta])
+ in
+ mk_tactic (intros_tac ~mk_fresh_name_callback ())
+
+let cut_tac ?(mk_fresh_name_callback = FreshNamesGenerator.mk_fresh_name ~subst:[]) term =
+ let cut_tac
+ ?(mk_fresh_name_callback = FreshNamesGenerator.mk_fresh_name ~subst:[])
+ term (proof, goal)
+ =
+ let module C = Cic in
+ let curi,metasenv,pbo,pty = proof in
+ let metano,context,ty = CicUtil.lookup_meta goal metasenv in
+ let newmeta1 = new_meta_of_proof ~proof in
+ let newmeta2 = newmeta1 + 1 in
+ let fresh_name =
+ mk_fresh_name_callback metasenv context (Cic.Name "Hcut") ~typ:term in
+ let context_for_newmeta1 =
+ (Some (fresh_name,C.Decl term))::context in
+ let irl1 =
+ CicMkImplicit.identity_relocation_list_for_metavariable
+ context_for_newmeta1
+ in
+ let irl2 =
+ CicMkImplicit.identity_relocation_list_for_metavariable context
+ in
+ let newmeta1ty = CicSubstitution.lift 1 ty in
+ let bo' =
+ C.Appl
+ [C.Lambda (fresh_name,term,C.Meta (newmeta1,irl1)) ;
+ C.Meta (newmeta2,irl2)]
+ in
+ let (newproof, _) =
+ subst_meta_in_proof proof metano bo'
+ [newmeta2,context,term; newmeta1,context_for_newmeta1,newmeta1ty];
+ in
+ (newproof, [newmeta1 ; newmeta2])
+ in
+ mk_tactic (cut_tac ~mk_fresh_name_callback term)
+
+let letin_tac ?(mk_fresh_name_callback=FreshNamesGenerator.mk_fresh_name ~subst:[]) term =
+ let letin_tac
+ ?(mk_fresh_name_callback = FreshNamesGenerator.mk_fresh_name ~subst:[])
+ term (proof, goal)
+ =
+ let module C = Cic in
+ let curi,metasenv,pbo,pty = proof in
+ let metano,context,ty = CicUtil.lookup_meta goal metasenv in
+ let _,_ = (* TASSI: FIXME *)
+ CicTypeChecker.type_of_aux' metasenv context term CicUniv.empty_ugraph in
+ let newmeta = new_meta_of_proof ~proof in
+ let fresh_name =
+ mk_fresh_name_callback metasenv context (Cic.Name "Hletin") ~typ:term in
+ let context_for_newmeta =
+ (Some (fresh_name,C.Def (term,None)))::context in
+ let irl =
+ CicMkImplicit.identity_relocation_list_for_metavariable
+ context_for_newmeta
+ in
+ let newmetaty = CicSubstitution.lift 1 ty in
+ let bo' = C.LetIn (fresh_name,term,C.Meta (newmeta,irl)) in
+ let (newproof, _) =
+ subst_meta_in_proof
+ proof metano bo'[newmeta,context_for_newmeta,newmetaty]
+ in
+ (newproof, [newmeta])
+ in
+ mk_tactic (letin_tac ~mk_fresh_name_callback term)
+
+ (** functional part of the "exact" tactic *)
+let exact_tac ~term =
+ let exact_tac ~term (proof, goal) =
+ (* Assumption: the term bo must be closed in the current context *)
+ let (_,metasenv,_,_) = proof in
+ let metano,context,ty = CicUtil.lookup_meta goal metasenv in
+ let module T = CicTypeChecker in
+ let module R = CicReduction in
+ let ty_term,u = T.type_of_aux' metasenv context term CicUniv.empty_ugraph in
+ let b,_ = R.are_convertible context ty_term ty u in (* TASSI: FIXME *)
+ if b then
+ begin
+ let (newproof, metasenv') =
+ subst_meta_in_proof proof metano term [] in
+ (newproof, [])
+ end
+ else
+ raise (Fail (lazy "The type of the provided term is not the one expected."))
+ in
+ mk_tactic (exact_tac ~term)
+
+(* not really "primitive" tactics .... *)
+let elim_tac ~term =
+ let elim_tac ~term (proof, goal) =
+ let module T = CicTypeChecker in
+ let module U = UriManager in
+ let module R = CicReduction in
+ let module C = Cic in
+ let (curi,metasenv,proofbo,proofty) = proof in
+ let metano,context,ty = CicUtil.lookup_meta goal metasenv in
+ let termty,_ = T.type_of_aux' metasenv context term CicUniv.empty_ugraph in
+ let (termty,metasenv',arguments,fresh_meta) =
+ ProofEngineHelpers.saturate_term
+ (ProofEngineHelpers.new_meta_of_proof proof) metasenv context termty 0 in
+ let term = if arguments = [] then term else Cic.Appl (term::arguments) in
+ let uri,exp_named_subst,typeno,args =
+ match termty with
+ C.MutInd (uri,typeno,exp_named_subst) -> (uri,exp_named_subst,typeno,[])
+ | C.Appl ((C.MutInd (uri,typeno,exp_named_subst))::args) ->
+ (uri,exp_named_subst,typeno,args)
+ | _ -> raise NotAnInductiveTypeToEliminate
+ in
+ let eliminator_uri =
+ let buri = U.buri_of_uri uri in
+ let name =
+ let o,_ = CicEnvironment.get_obj CicUniv.empty_ugraph uri in
+ match o with
+ C.InductiveDefinition (tys,_,_,_) ->
+ let (name,_,_,_) = List.nth tys typeno in
+ name
+ | _ -> assert false
+ in
+ let ty_ty,_ = T.type_of_aux' metasenv' context ty CicUniv.empty_ugraph in
+ let ext =
+ match ty_ty with
+ C.Sort C.Prop -> "_ind"
+ | C.Sort C.Set -> "_rec"
+ | C.Sort C.CProp -> "_rec"
+ | C.Sort (C.Type _)-> "_rect"
+ | C.Meta (_,_) -> raise TheTypeOfTheCurrentGoalIsAMetaICannotChooseTheRightElimiantionPrinciple
+ | _ -> assert false
+ in
+ U.uri_of_string (buri ^ "/" ^ name ^ ext ^ ".con")
+ in
+ let eliminator_ref = C.Const (eliminator_uri,exp_named_subst) in
+ let ety,_ =
+ T.type_of_aux' metasenv' context eliminator_ref CicUniv.empty_ugraph in
+ let rec find_args_no =
+ function
+ C.Prod (_,_,t) -> 1 + find_args_no t
+ | C.Cast (s,_) -> find_args_no s
+ | C.LetIn (_,_,t) -> 0 + find_args_no t
+ | _ -> 0
+ in
+ let args_no = find_args_no ety in
+ let term_to_refine =
+ let rec make_tl base_case =
+ function
+ 0 -> [base_case]
+ | n -> (C.Implicit None)::(make_tl base_case (n - 1))
+ in
+ C.Appl (eliminator_ref :: make_tl term (args_no - 1))
+ in
+ let refined_term,_,metasenv'',_ =
+ CicRefine.type_of_aux' metasenv' context term_to_refine
+ CicUniv.empty_ugraph
+ in
+ let new_goals =
+ ProofEngineHelpers.compare_metasenvs
+ ~oldmetasenv:metasenv ~newmetasenv:metasenv''
+ in
+ let proof' = curi,metasenv'',proofbo,proofty in
+ let proof'', new_goals' =
+ apply_tactic (apply_tac ~term:refined_term) (proof',goal)
+ in
+ (* The apply_tactic can have closed some of the new_goals *)
+ let patched_new_goals =
+ let (_,metasenv''',_,_) = proof'' in
+ List.filter
+ (function i -> List.exists (function (j,_,_) -> j=i) metasenv'''
+ ) new_goals @ new_goals'
+ in
+ proof'', patched_new_goals
+ in
+ mk_tactic (elim_tac ~term)
+;;
+
+let elim_intros_tac ?(mk_fresh_name_callback = FreshNamesGenerator.mk_fresh_name ~subst:[])
+ ?depth ?using what =
+ Tacticals.then_ ~start:(elim_tac ~term:what)
+ ~continuation:(intros_tac ~mk_fresh_name_callback ?howmany:depth ())
+;;
+
+(* The simplification is performed only on the conclusion *)
+let elim_intros_simpl_tac ?(mk_fresh_name_callback = FreshNamesGenerator.mk_fresh_name ~subst:[])
+ ?depth ?using what =
+ Tacticals.then_ ~start:(elim_tac ~term:what)
+ ~continuation:
+ (Tacticals.thens
+ ~start:(intros_tac ~mk_fresh_name_callback ?howmany:depth ())
+ ~continuations:
+ [ReductionTactics.simpl_tac
+ ~pattern:(ProofEngineTypes.conclusion_pattern None)])
+;;
projects / helm.git / blobdiff