X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fcomponents%2Fng_kernel%2FnCicEnvironment.ml;h=ef3bca22d06941ebfa20fe883d4423eb7ec87e0e;hb=235d5cc96af46d0406bdd28222f56b3ee2bf827e;hp=37cebe647cc567bfc4437ba8ce9aff87e632423e;hpb=a981dd18ae8ad9e9da79615fb80fe85dfe609f05;p=helm.git

diff --git a/helm/software/components/ng_kernel/nCicEnvironment.ml b/helm/software/components/ng_kernel/nCicEnvironment.ml
index 37cebe647..ef3bca22d 100644
--- a/helm/software/components/ng_kernel/nCicEnvironment.ml
+++ b/helm/software/components/ng_kernel/nCicEnvironment.ml
@@ -1,13 +1,231 @@
+(*
+    ||M||  This file is part of HELM, an Hypertextual, Electronic        
+    ||A||  Library of Mathematics, developed at the Computer Science     
+    ||T||  Department, University of Bologna, Italy.                     
+    ||I||                                                                
+    ||T||  HELM is free software; you can redistribute it and/or         
+    ||A||  modify it under the terms of the GNU General Public License   
+    \   /  version 2 or (at your option) any later version.      
+     \ /   This software is distributed as is, NO WARRANTY.     
+      V_______________________________________________________________ *)
+
+(* $Id$ *)
+
+module C = NCic
+module Ref = NReference
+
+exception CircularDependency of string Lazy.t;;
+exception ObjectNotFound of string Lazy.t;;
+exception BadDependency of string Lazy.t * exn;;
+exception BadConstraint of string Lazy.t;;
+
+let get_obj = ref (fun _ -> assert false);;
+let set_get_obj f = get_obj := f;;
+
+let type0 = []
+
+let max l1 l2 =
+ HExtlib.list_uniq ~eq:(fun (b1,u1) (b2,u2) -> b1=b2 && NUri.eq u1 u2)
+  (List.sort (fun (b1,u1) (b2,u2) ->
+    let res = compare b1 b2 in if res = 0 then NUri.compare u1 u2 else res)
+      (l1 @ l2))
+
+let le_constraints = ref [] (* strict,a,b *)
+
+let rec le_path_uri avoid strict a b =
+ (not strict && NUri.eq a b) ||
+ List.exists
+  (fun (strict',x,y) ->
+     NUri.eq y b && not (List.exists (NUri.eq x) avoid) &&
+       le_path_uri (x::avoid) (strict && not strict') a x
+  ) !le_constraints
+;;
+
+let leq_path a b = le_path_uri [b] (fst a) (snd a) b;;
+
+let universe_leq a b = 
+  match a, b with
+  | a,[(false,b)] -> List.for_all (fun a -> leq_path a b) a
+  | _,_ ->
+     raise (BadConstraint
+      (lazy "trying to check if a universe is less or equal than an inferred universe"))
+
+let universe_eq a b = 
+  match a,b with 
+  | [(false,_)], [(false,_)] -> universe_leq b a && universe_leq a b
+  | _, [(false,_)]
+  | [(false,_)],_ -> false
+  | _ ->
+     raise (BadConstraint
+      (lazy "trying to check if two inferred universes are equal"))
+;;
+
+let pp_constraint b x y =  
+  NUri.name_of_uri x ^ (if b then " < " else " <= ") ^ NUri.name_of_uri y
+;;
+
+let pp_constraints () =
+  String.concat "\n" (List.map (fun (b,x,y) -> pp_constraint b x y) !le_constraints)
+;;
+
+let universes = ref [];;
+
+let add_constraint strict a b = 
+  match a,b with
+  | [false,a2],[false,b2] -> 
+      if not (le_path_uri [] strict a2 b2) then (
+        if le_path_uri [] (not strict) b2 a2 then
+         (raise(BadConstraint(lazy("universe inconsistency adding "^pp_constraint strict a2 b2
+           ^ " to:\n" ^ pp_constraints ()))));
+        universes := a2 :: b2 :: 
+          List.filter (fun x -> not (NUri.eq x a2 || NUri.eq x b2)) !universes;
+        le_constraints := (strict,a2,b2) :: !le_constraints)
+  | _ -> raise (BadConstraint
+          (lazy "trying to add a constraint on an inferred universe"))
+;;
+
+let sup l =
+  match l with
+  | [false,_] -> Some l
+  | l ->
+   let bigger_than acc (s1,n1) = List.filter (le_path_uri [] s1 n1) acc in
+   let solutions = List.fold_left bigger_than !universes l in
+   let rec aux = function
+     | [] -> None
+     | u :: tl ->
+         if List.exists (fun x -> le_path_uri [] true x u) solutions then aux tl
+         else Some [false,u]
+   in
+    aux solutions
+;;
+
+
+
+let typecheck_obj,already_set = ref (fun _ -> assert false), ref false;;
+let set_typecheck_obj f =
+ if !already_set then
+  assert false
+ else
+  begin
+   typecheck_obj := f;
+   already_set := true
+  end
+;;
+
 let cache = NUri.UriHash.create 313;;
+let frozen_list = ref [];;
+
+exception Propagate of NUri.uri * exn;;
 
 let get_checked_obj u =
-  try NUri.UriHash.find cache u
-  with Not_found ->
-    let ouri = NUri.ouri_of_nuri u in
-    let o,_ = 
-      CicEnvironment.get_cooked_obj ~trust:false CicUniv.oblivion_ugraph 
-        ouri in
-    let no = OCic2NCic.convert_obj ouri o in
-    NUri.UriHash.add cache u no;
-    no
+ if List.exists (fun (k,_) -> NUri.eq u k) !frozen_list
+ then
+  raise (CircularDependency (lazy (NUri.string_of_uri u)))
+ else
+  let obj =
+   try NUri.UriHash.find cache u
+   with
+    Not_found ->
+     let saved_frozen_list = !frozen_list in
+     try
+      let obj = !get_obj u in
+       frozen_list := (u,obj)::saved_frozen_list;
+       !typecheck_obj obj;
+       frozen_list := saved_frozen_list;
+       let obj = `WellTyped obj in
+       NUri.UriHash.add cache u obj;
+       obj
+     with
+        Sys.Break as e ->
+         frozen_list := saved_frozen_list;
+         raise e
+      | Propagate (u',old_exn) as e' ->
+         frozen_list := saved_frozen_list;
+         let exn = `Exn (BadDependency (lazy (NUri.string_of_uri u ^
+           " depends (recursively) on " ^ NUri.string_of_uri u' ^
+           " which is not well-typed"), 
+           match old_exn with BadDependency (_,e) -> e | _ -> old_exn)) in
+         NUri.UriHash.add cache u exn;
+         if saved_frozen_list = [] then
+          exn
+         else
+          raise e'
+      | e ->
+         frozen_list := saved_frozen_list;
+         let exn = `Exn e in
+         NUri.UriHash.add cache u exn;
+         if saved_frozen_list = [] then
+          exn
+         else
+          raise (Propagate (u,e))
+  in
+   match obj with
+      `WellTyped o -> o
+    | `Exn e -> raise e
+;;
+
+let get_checked_decl = function
+  | Ref.Ref (uri, Ref.Decl) ->
+      (match get_checked_obj uri with
+      | _,height,_,_, C.Constant (rlv,name,None,ty,att) ->
+          rlv,name,ty,att,height
+      | _,_,_,_, C.Constant (_,_,Some _,_,_) ->
+          prerr_endline "get_checked_decl on a definition"; assert false
+      | _ -> prerr_endline "get_checked_decl on a non decl 2"; assert false)
+  | _ -> prerr_endline "get_checked_decl on a non decl"; assert false
+;;
+
+let get_checked_def = function
+  | Ref.Ref (uri, Ref.Def _) ->
+      (match get_checked_obj uri with
+      | _,height,_,_, C.Constant (rlv,name,Some bo,ty,att) ->
+          rlv,name,bo,ty,att,height
+      | _,_,_,_, C.Constant (_,_,None,_,_) ->
+          prerr_endline "get_checked_def on an axiom"; assert false
+      | _ -> prerr_endline "get_checked_def on a non def 2"; assert false)
+  | _ -> prerr_endline "get_checked_def on a non def"; assert false
+;;
+
+let get_checked_indtys = function
+  | Ref.Ref (uri, (Ref.Ind (_,n,_)|Ref.Con (n,_,_))) ->
+      (match get_checked_obj uri with
+      | _,_,_,_, C.Inductive (inductive,leftno,tys,att) ->
+        inductive,leftno,tys,att,n
+      | _ -> prerr_endline "get_checked_indtys on a non ind 2"; assert false)
+  | _ -> prerr_endline "get_checked_indtys on a non ind"; assert false
+;;
+
+let get_checked_fixes_or_cofixes = function
+  | Ref.Ref (uri, (Ref.Fix _|Ref.CoFix _))->
+      (match get_checked_obj uri with
+      | _,height,_,_, C.Fixpoint (_,funcs,att) ->
+         funcs, att, height
+      | _ ->prerr_endline "get_checked_(co)fix on a non (co)fix 2";assert false)
+  | _ -> prerr_endline "get_checked_(co)fix on a non (co)fix"; assert false
+;;
+
+let get_relevance (Ref.Ref (_, infos) as r) =
+  match infos with
+     Ref.Def _ -> let res,_,_,_,_,_ = get_checked_def r in res
+   | Ref.Decl -> let res,_,_,_,_ = get_checked_decl r in res
+   | Ref.Ind _ ->
+       let _,_,tl,_,n = get_checked_indtys r in
+       let res,_,_,_ = List.nth tl n in
+         res
+    | Ref.Con (_,i,_) ->
+       let _,_,tl,_,n = get_checked_indtys r in
+       let _,_,_,cl = List.nth tl n in
+       let res,_,_ = List.nth cl (i - 1) in
+         res
+    | Ref.Fix (fixno,_,_)
+    | Ref.CoFix fixno ->
+        let fl,_,_ = get_checked_fixes_or_cofixes r in
+        let res,_,_,_,_ = List.nth fl fixno in
+          res
+;;
+
+
+let invalidate _ = 
+  assert (!frozen_list = []);
+  NUri.UriHash.clear cache
 ;;