--- /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_______________________________________________________________ *)
+
+module P = Printf
+module U = NUri
+module C = Cps
+module H = Hierarchy
+module Y = Entity
+module X = Library
+module D = Crg
+
+(****************************************************************************)
+
+let pp_attrs out a =
+ let map = function
+ | Y.Name (s, true) -> out (P.sprintf "%s;" s)
+ | Y.Name (s, false) -> out (P.sprintf "~%s;" s)
+ | Y.Apix i -> out (P.sprintf "+%i;" i)
+ | Y.Mark i -> out (P.sprintf "@%i;" i)
+ | Y.Priv -> out (P.sprintf "%s;" "~")
+ in
+ List.iter map a
+
+let rec pp_term out = function
+ | D.TSort (a, l) -> pp_attrs out a; out (P.sprintf "*%u" l)
+ | D.TLRef (a, i, j) -> pp_attrs out a; out (P.sprintf "#(%u,%u)" i j)
+ | D.TGRef (a, u) -> pp_attrs out a; out (P.sprintf "$")
+ | D.TCast (a, x, y) -> pp_attrs out a; out "<"; pp_term out x; out ">."; pp_term out y
+ | D.TProj (a, x, y) -> assert false
+ | D.TAppl (a, x, y) -> pp_attrs out a; pp_terms "(" ")" out x; pp_term out y
+ | D.TBind (a, x, y) -> pp_attrs out a; pp_bind out x; pp_term out y
+
+and pp_terms bg eg out vs =
+ let rec aux = function
+ | [] -> ()
+ | [v] -> pp_term out v
+ | v :: vs -> pp_term out v; out ", "; aux vs
+ in
+ out bg; aux vs; out (eg ^ ".")
+
+and pp_bind out = function
+ | D.Abst x -> pp_terms "[:" "]" out x
+ | D.Abbr x -> pp_terms "[=" "]" out x
+ | D.Void x -> out (P.sprintf "[%u]" x)
+
+let rec pp_lenv out = function
+ | D.ESort -> ()
+ | D.EProj (x, a, y) -> assert false
+ | D.EBind (x, a, y) -> pp_lenv out x; pp_attrs out a; pp_bind out y
+
+(****************************************************************************)
+
+let rec list_iter map l out tab = match l with
+ | [] -> ()
+ | hd :: tl -> map hd out tab; list_iter map tl out tab
+
+let list_rev_iter map e ns l out tab =
+ let rec aux err f e = function
+ | [], [] -> f e
+ | n :: ns, hd :: tl ->
+ let f e =
+(*
+ pp_lenv print_string e; print_string " |- ";
+ pp_term print_string hd; print_newline ();
+*)
+ map e hd out tab; f (D.push2 C.err C.start e n ~t:hd)
+ in
+ aux err f e (ns, tl)
+ | _ -> err ()
+ in
+ ignore (aux C.err C.start e (ns, l))
+
+let lenv_iter map1 map2 l out tab =
+ let rec aux f = function
+ | D.ESort -> f ()
+ | D.EBind (lenv, a, b) -> aux (fun () -> map1 a b out tab; f ()) lenv
+ | D.EProj (lenv, a, e) -> aux (fun () -> map2 a e out tab; f ()) lenv
+ in
+ aux C.start l
+
+let rec exp_term e t out tab = match t with
+ | D.TSort (a, l) ->
+ let a =
+ let err _ = a in
+ let f s = Y.Name (s, true) :: a in
+ H.get_sort err f l
+ in
+ let attrs = [X.position l; X.name a] in
+ X.tag X.sort attrs out tab
+ | D.TLRef (a, i, j) ->
+ let a =
+ let err _ = a in
+ let f n r = Y.Name (n, r) :: a in
+ D.get_name err f i j e
+ in
+ let attrs = [X.position i; X.offset j; X.name a] in
+ X.tag X.lref attrs out tab
+ | D.TGRef (a, n) ->
+ let a = Y.Name (U.name_of_uri n, true) :: a in
+ let attrs = [X.uri n; X.name a] in
+ X.tag X.gref attrs out tab
+ | D.TCast (a, u, t) ->
+ let attrs = [] in
+ X.tag X.cast attrs ~contents:(exp_term e u) out tab;
+ exp_term e t out tab
+ | D.TAppl (a, vs, t) ->
+ let attrs = [X.arity (List.length vs)] in
+ X.tag X.appl attrs ~contents:(list_iter (exp_term e) vs) out tab;
+ exp_term e t out tab
+ | D.TProj (a, lenv, t) ->
+ let attrs = [] in
+ X.tag X.proj attrs ~contents:(lenv_iter (exp_bind e) (exp_eproj e) lenv) out tab;
+ exp_term (D.push_proj C.start e a lenv) t out tab
+ | D.TBind (a, b, t) ->
+ exp_bind e a b out tab;
+ exp_term (D.push_bind C.start e a b) t out tab
+
+and exp_bind e a b out tab =
+ let f a ns = a, ns in
+ let a, ns = Y.get_names f a in
+ match b with
+ | D.Abst ws ->
+ let e = D.push_bind C.start e a (D.Abst []) in
+ let attrs = [X.name ns; X.mark a; X.arity (List.length ws)] in
+ X.tag X.abst attrs ~contents:(list_rev_iter exp_term e ns ws) out tab
+ | D.Abbr vs ->
+ let e = D.push_bind C.start e a (D.Abbr []) in
+ let attrs = [X.name ns; X.mark a; X.arity (List.length vs)] in
+ X.tag X.abbr attrs ~contents:(list_rev_iter exp_term e ns vs) out tab
+ | D.Void n ->
+ let attrs = [X.name a; X.mark a; X.arity n] in
+ X.tag X.void attrs out tab
+
+and exp_eproj e a lenv out tab =
+ let attrs = [] in
+ X.tag X.proj attrs ~contents:(lenv_iter (exp_bind e) (exp_eproj e) lenv) out tab
+
+(****************************************************************************)
+
+let export_term = exp_term D.empty_lenv
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