2 ||M|| This file is part of HELM, an Hypertextual, Electronic
3 ||A|| Library of Mathematics, developed at the Computer Science
4 ||T|| Department, University of Bologna, Italy.
6 ||T|| HELM is free software; you can redistribute it and/or
7 ||A|| modify it under the terms of the GNU General Public License
8 \ / version 2 or (at your option) any later version.
9 \ / This software is distributed as is, NO WARRANTY.
10 V_______________________________________________________________ *)
16 module BE = BrgEnvironment
17 module BR = BrgReduction
19 module BV = BrgValidity
21 (* Interface functions ******************************************************)
24 let type_check err f st = function
25 | a, uri, E.Abst (n, t) ->
26 let err msg = err (L.Uri uri :: msg) in
28 let e = BE.set_entity (a, uri, E.Abst (n, xt)) in f tt e
30 BT.type_of err f st BR.empty_kam t
32 let err msg = err (L.Uri uri :: msg) in
34 let xt = match xt with
36 | _ -> B.Cast ([], tt, xt)
38 let e = BE.set_entity (a, uri, E.Abbr xt) in f tt e
40 BT.type_of err f st BR.empty_kam t
41 | _, _, E.Void -> assert false
43 let validate err f st e =
44 let uri, t = match e with
45 | _, uri, E.Abst (_, t) -> uri, t
46 | _, uri, E.Abbr t -> uri, t
47 | _, _, E.Void -> assert false
49 let err msg = err (L.Uri uri :: msg) in
50 let f () = let _ = BE.set_entity e in f () in
51 BV.validate err f st BR.empty_kam t