+++ /dev/null
-(*
- ||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_______________________________________________________________ *)
-
-type uri = NUri.uri
-type id = Aut.id
-
-type bind = Void (* exclusion *)
- | Abst of term (* abstraction *)
- | Abbr of term (* abbreviation *)
-
-and term = Sort of int (* hierarchy index *)
- | LRef of int (* reverse de Bruijn index *)
- | GRef of uri (* reference *)
- | Cast of term * term (* type, term *)
- | Appl of term * term (* argument, function *)
- | Bind of id * bind * term (* name, binder, scope *)
-
-type obj = int * uri * bind (* age, uri, binder, contents *)
-
-type item = obj option
-
-type context = int * (id * bind) list
-
-type message = (context, term) Log.item list
-
-(* Currified constructors ***************************************************)
-
-let abst w = Abst w
-
-let abbr v = Abbr v
-
-let cast u t = Cast (u, t)
-
-let appl u t = Appl (u, t)
-
-let bind id b t = Bind (id, b, t)
-
-let bind_abst id u t = Bind (id, Abst u, t)
-
-let bind_abbr id v t = Bind (id, Abbr v, t)
-
-(* context handling functions ***********************************************)
-
-let empty_context = 0, []
-
-let push f (l, es) id b =
- let c = succ l, (id, b) :: es in
- f c
-
-let append f (l1, es1) (l2, es2) =
- f (l2 + l1, List.append es2 es1)
-
-let map f map (l, es) =
- let f es = f (l, es) in
- Cps.list_map f map es
-
-let contents f (l, es) = f l es
-
-let get f (l, es) i =
- if i < 0 || i >= l then f None else
- let result = List.nth es (l - succ i) in
- f (Some result)
-