From be742cc27bb15a8c7bd9cf030e8a16f266e36f03 Mon Sep 17 00:00:00 2001
From: Wilmer Ricciotti <ricciott@cs.unibo.it>
Date: Thu, 12 May 2011 15:59:10 +0000
Subject: [PATCH] Record projections: no need to synthesize an ast term from a
 CIC term: just use NotationPt.NCic ; this also fixes a bug that used to
 prevent generation of projections when the types of some fields was
 associated to a notation (example: natural numbers expressed using
 \naturals).

---
 matita/components/ng_tactics/nCicElim.ml | 63 ++----------------------
 1 file changed, 3 insertions(+), 60 deletions(-)

diff --git a/matita/components/ng_tactics/nCicElim.ml b/matita/components/ng_tactics/nCicElim.ml
index 24fd7d8e9..bd6add07c 100644
--- a/matita/components/ng_tactics/nCicElim.ml
+++ b/matita/components/ng_tactics/nCicElim.ml
@@ -219,59 +219,6 @@ let rec nth_prod projs n ty =
   | _ -> assert false
 ;;
 
-(* this code should be unified with NTermCicContent.nast_of_cic0,
-   but the two contexts have different types *)
-let pp (status: #NCic.status) =
- let rec pp rels =
-  function
-    NCic.Rel i -> List.nth rels (i - 1)
-  | NCic.Const _ as t ->
-     NotationPt.Ident
-      (status#ppterm ~metasenv:[] ~subst:[] ~context:[] t,None)
-  | NCic.Sort s -> NotationPt.Sort (fst (ast_of_sort s))
-  | NCic.Meta _
-  | NCic.Implicit _ -> assert false
-  | NCic.Appl l -> NotationPt.Appl (List.map (pp rels) l)
-  | NCic.Prod (n,s,t) ->
-     let n = mk_id n in
-      NotationPt.Binder (`Pi, (n,Some (pp rels s)), pp (n::rels) t)
-  | NCic.Lambda (n,s,t) ->
-     let n = mk_id n in
-      NotationPt.Binder (`Lambda, (n,Some (pp rels s)), pp (n::rels) t)
-  | NCic.LetIn (n,s,ty,t) ->
-     let n = mk_id n in
-      NotationPt.LetIn ((n, Some (pp rels ty)), pp rels s, pp (n::rels) t)
-  | NCic.Match (NReference.Ref (uri,_) as r,outty,te,patterns) ->
-    let name = NUri.name_of_uri uri in
-    let case_indty = Some (name, None) in
-    let constructors, leftno =
-     let _,leftno,tys,_,n = NCicEnvironment.get_checked_indtys status r in
-     let _,_,_,cl  = List.nth tys n in
-      cl,leftno
-    in
-    let rec eat_branch n rels ty pat =
-      match (ty, pat) with
-      | NCic.Prod (name, s, t), _ when n > 0 ->
-         eat_branch (pred n) rels t pat
-      | NCic.Prod (_, _, t), NCic.Lambda (name, s, t') ->
-          let cv, rhs = eat_branch 0 ((mk_id name)::rels) t t' in
-           (mk_id name, Some (pp rels s)) :: cv, rhs
-      | _, _ -> [], pp rels pat
-    in
-    let patterns =
-      try
-        List.map2
-          (fun (_, name, ty) pat ->
-            let capture_variables,rhs = eat_branch leftno rels ty pat in
-             NotationPt.Pattern (name, None, capture_variables), rhs
-          ) constructors patterns
-      with Invalid_argument _ -> assert false
-    in
-     NotationPt.Case (pp rels te, case_indty, Some (pp rels outty), patterns)
- in
-  pp
-;;
-
 let mk_projection status leftno tyname consname consty (projname,_,_) i =
  let argsno = count_prods consty - leftno in
  let rec aux names ty leftno =
@@ -285,13 +232,9 @@ let mk_projection status leftno tyname consname consty (projname,_,_) i =
       HExtlib.mk_list underscore i @ [bvar,None] @
        HExtlib.mk_list underscore (argsno - i -1) in
      let branch = NotationPt.Pattern (consname,None,bvars), bvar in
-     let projs,outtype = nth_prod [] i ty in
-     let rels =
-      List.map
-       (fun name -> mk_appl (mk_id name :: List.rev names @ [arg])) projs
-      @ names in
-     let outtype = pp status rels outtype in
-     let outtype= NotationPt.Binder (`Lambda, (arg, Some arg_ty), outtype) in
+     let _,outtype = nth_prod [] i ty in
+     let outtype= 
+       NotationPt.Binder (`Lambda, (arg, Some arg_ty), NotationPt.NCic outtype) in
       [arg, Some arg_ty], NotationPt.Case (arg,None,Some outtype,[branch])
    | _,NCic.Prod (name,_,t) ->
       let name = mk_id name in
-- 
2.39.2