(*
    ||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 D = Crg

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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.Meta s          -> out (P.sprintf "\"%s\";" s)
      | 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

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