+++ /dev/null
-(* Copyright (C) 2000, 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/.
- *)
-
-exception CannotSubstInMeta;;
-exception RelToHiddenHypothesis;;
-
-let lift n =
- let rec liftaux k =
- let module C = Cic in
- function
- C.Rel m ->
- if m < k then
- C.Rel m
- else
- C.Rel (m + n)
- | C.Var _ as t -> t
- | C.Meta (i,l) ->
- let l' =
- List.map
- (function
- None -> None
- | Some t -> Some (liftaux k t)
- ) l
- in
- C.Meta(i,l')
- | C.Sort _ as t -> t
- | C.Implicit as t -> t
- | C.Cast (te,ty) -> C.Cast (liftaux k te, liftaux k ty)
- | C.Prod (n,s,t) -> C.Prod (n, liftaux k s, liftaux (k+1) t)
- | C.Lambda (n,s,t) -> C.Lambda (n, liftaux k s, liftaux (k+1) t)
- | C.LetIn (n,s,t) -> C.LetIn (n, liftaux k s, liftaux (k+1) t)
- | C.Appl l -> C.Appl (List.map (liftaux k) l)
- | C.Const _ as t -> t
- | C.MutInd _ as t -> t
- | C.MutConstruct _ as t -> t
- | C.MutCase (sp,cookingsno,i,outty,t,pl) ->
- C.MutCase (sp, cookingsno, i, liftaux k outty, liftaux k t,
- List.map (liftaux k) pl)
- | C.Fix (i, fl) ->
- let len = List.length fl in
- let liftedfl =
- List.map
- (fun (name, i, ty, bo) -> (name, i, liftaux k ty, liftaux (k+len) bo))
- fl
- in
- C.Fix (i, liftedfl)
- | C.CoFix (i, fl) ->
- let len = List.length fl in
- let liftedfl =
- List.map
- (fun (name, ty, bo) -> (name, liftaux k ty, liftaux (k+len) bo))
- fl
- in
- C.CoFix (i, liftedfl)
- in
- if n = 0 then
- (function t -> t)
- else
- liftaux 1
-;;
-
-let subst arg =
- let rec substaux k =
- let module C = Cic in
- function
- C.Rel n as t ->
- (match n with
- n when n = k -> lift (k - 1) arg
- | n when n < k -> t
- | _ -> C.Rel (n - 1)
- )
- | C.Var _ as t -> t
- | C.Meta (i, l) as t ->
- let l' =
- List.map
- (function
- None -> None
- | Some t -> Some (substaux k t)
- ) l
- in
- C.Meta(i,l')
- | C.Sort _ as t -> t
- | C.Implicit as t -> t
- | C.Cast (te,ty) -> C.Cast (substaux k te, substaux k ty)
- | C.Prod (n,s,t) -> C.Prod (n, substaux k s, substaux (k + 1) t)
- | C.Lambda (n,s,t) -> C.Lambda (n, substaux k s, substaux (k + 1) t)
- | C.LetIn (n,s,t) -> C.LetIn (n, substaux k s, substaux (k + 1) t)
- | C.Appl (he::tl) ->
- (* Invariant: no Appl applied to another Appl *)
- let tl' = List.map (substaux k) tl in
- begin
- match substaux k he with
- C.Appl l -> C.Appl (l@tl')
- | _ as he' -> C.Appl (he'::tl')
- end
- | C.Appl _ -> assert false
- | C.Const _ as t -> t
- | C.MutInd _ as t -> t
- | C.MutConstruct _ as t -> t
- | C.MutCase (sp,cookingsno,i,outt,t,pl) ->
- C.MutCase (sp,cookingsno,i,substaux k outt, substaux k t,
- List.map (substaux k) pl)
- | C.Fix (i,fl) ->
- let len = List.length fl in
- let substitutedfl =
- List.map
- (fun (name,i,ty,bo) -> (name, i, substaux k ty, substaux (k+len) bo))
- fl
- in
- C.Fix (i, substitutedfl)
- | C.CoFix (i,fl) ->
- let len = List.length fl in
- let substitutedfl =
- List.map
- (fun (name,ty,bo) -> (name, substaux k ty, substaux (k+len) bo))
- fl
- in
- C.CoFix (i, substitutedfl)
- in
- substaux 1
-;;
-
-let undebrujin_inductive_def uri =
- function
- Cic.InductiveDefinition (dl,params,n_ind_params) ->
- let dl' =
- List.map
- (fun (name,inductive,arity,constructors) ->
- let constructors' =
- List.map
- (fun (name,ty,r) ->
- let ty' =
- let counter = ref (List.length dl) in
- List.fold_right
- (fun _ ->
- decr counter ;
- subst (Cic.MutInd (uri,0,!counter))
- ) dl ty
- in
- (name,ty',r)
- ) constructors
- in
- (name,inductive,arity,constructors')
- ) dl
- in
- Cic.InductiveDefinition (dl', params, n_ind_params)
- | obj -> obj
-;;
-
-(* l is the relocation list *)
-
-let lift_meta l t =
- let module C = Cic in
- if l = [] then t else
- let rec aux k = function
- C.Rel n as t ->
- if n <= k then t else
- (try
- match List.nth l (n-k-1) with
- None -> raise RelToHiddenHypothesis
- | Some t -> lift k t
- with
- (Failure _) -> assert false
- )
- | C.Var _ as t -> t
- | C.Meta (i,l) ->
- let l' =
- List.map
- (function
- None -> None
- | Some t ->
- try
- Some (aux k t)
- with
- RelToHiddenHypothesis -> None
- ) l
- in
- C.Meta(i,l')
- | C.Sort _ as t -> t
- | C.Implicit as t -> t
- | C.Cast (te,ty) -> C.Cast (aux k te, aux k ty) (*CSC ??? *)
- | C.Prod (n,s,t) -> C.Prod (n, aux k s, aux (k + 1) t)
- | C.Lambda (n,s,t) -> C.Lambda (n, aux k s, aux (k + 1) t)
- | C.LetIn (n,s,t) -> C.LetIn (n, aux k s, aux (k + 1) t)
- | C.Appl l -> C.Appl (List.map (aux k) l)
- | C.Const _ as t -> t
- | C.MutInd _ as t -> t
- | C.MutConstruct _ as t -> t
- | C.MutCase (sp,cookingsno,i,outt,t,pl) ->
- C.MutCase (sp,cookingsno,i,aux k outt, aux k t,
- List.map (aux k) pl)
- | C.Fix (i,fl) ->
- let len = List.length fl in
- let substitutedfl =
- List.map
- (fun (name,i,ty,bo) -> (name, i, aux k ty, aux (k+len) bo))
- fl
- in
- C.Fix (i, substitutedfl)
- | C.CoFix (i,fl) ->
- let len = List.length fl in
- let substitutedfl =
- List.map
- (fun (name,ty,bo) -> (name, aux k ty, aux (k+len) bo))
- fl
- in
- C.CoFix (i, substitutedfl)
- in
- aux 0 t
-;;
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