new kernel basic_rg: implements ufficial lambda-delta with de Bruijn indexes

[helm.git] / helm / software / lambda-delta / basic_rg / brgUntrusted.ml

diff --git a/helm/software/lambda-delta/basic_rg/brgUntrusted.ml b/helm/software/lambda-delta/basic_rg/brgUntrusted.ml
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+(*
+    ||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_______________________________________________________________ *)
+
+module L = Log
+module B = Brg
+module E = BrgEnvironment
+module T = BrgType
+
+(* Interface functions ******************************************************)
+
+(* to share *)
+let type_check f g = function
+   | None                    -> f None None
+   | Some (e, uri, B.Abst t) ->
+      let f tt obj = f (Some tt) (Some obj) in
+      let f xt tt = E.set_obj (f tt) (e, uri, B.Abst xt) in
+      L.loc := e; T.type_of f g B.empty_context t
+   | Some (e, uri, B.Abbr t) ->
+      let f tt obj = f (Some tt) (Some obj) in
+      let f xt tt = E.set_obj (f tt) (e, uri, B.Abbr xt) in
+      L.loc := e; T.type_of f g B.empty_context t
+   | Some (e, uri, B.Void)   ->
+      let f obj = f None (Some obj) in
+      L.loc := e; E.set_obj f (e, uri, B.Void)