1 (* Copyright (C) 2004, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
7 * HELM is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * HELM is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with HELM; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://helm.cs.unibo.it/
28 let pp_binder = function
34 let pp_name = function Cic.Anonymous -> "_" | Cic.Name s -> s
36 let rec pp_term = function
37 | CicAst.AttributedTerm (_, term) -> pp_term term
38 | CicAst.Appl terms ->
39 sprintf "(%s)" (String.concat " " (List.map pp_term terms))
40 | CicAst.Binder (`Forall, (Cic.Anonymous, typ), body)
41 | CicAst.Binder (`Pi, (Cic.Anonymous, typ), body) ->
42 sprintf "(%s \\to %s)"
43 (match typ with None -> "?" | Some typ -> pp_term typ)
45 | CicAst.Binder (kind, var, body) ->
46 sprintf "\\%s %s.%s" (pp_binder kind) (pp_capture_variable var)
48 | CicAst.Case (term, indtype, typ, patterns) ->
49 sprintf "%smatch %s with %s"
50 (match typ with None -> "" | Some t -> sprintf "<%s>" (pp_term t))
51 (pp_term term) (pp_patterns patterns)
52 | CicAst.Cast (t1,t2) -> sprintf "(%s: %s)" (pp_term t1) (pp_term t2)
53 | CicAst.LetIn (var, t1, t2) ->
54 sprintf "let %s = %s in %s" (pp_capture_variable var) (pp_term t1)
56 | CicAst.LetRec (kind, definitions, term) ->
57 sprintf "let %s %s in %s"
58 (match kind with `Inductive -> "rec" | `CoInductive -> "corec")
59 (String.concat " and "
61 (fun (var, body, _) ->
62 sprintf "%s = %s" (pp_capture_variable var) (pp_term body))
65 | CicAst.Ident (name, Some []) | CicAst.Ident (name, None)
66 | CicAst.Uri (name, Some []) | CicAst.Uri (name, None) ->
68 | CicAst.Ident (name, Some substs)
69 | CicAst.Uri (name, Some substs) ->
70 sprintf "%s \\subst [%s]" name (pp_substs substs)
71 | CicAst.Implicit -> "?"
72 | CicAst.Meta (index, substs) ->
73 sprintf "%d[%s]" index
75 (List.map (function None -> "_" | Some term -> pp_term term) substs))
76 | CicAst.Num (num, _) -> num
77 | CicAst.Sort `Set -> "Set"
78 | CicAst.Sort `Prop -> "Prop"
79 | CicAst.Sort `Type -> "Type"
80 | CicAst.Sort `CProp -> "CProp"
81 | CicAst.Symbol (name, _) -> name
82 | CicAst.UserInput -> "%"
84 and pp_subst (name, term) = sprintf "%s \\Assign %s" name (pp_term term)
85 and pp_substs substs = String.concat "; " (List.map pp_subst substs)
87 and pp_pattern ((head, vars), term) =
88 sprintf "%s \\Rightarrow %s"
92 sprintf "(%s %s)" head
93 (String.concat " " (List.map pp_capture_variable vars)))
96 and pp_patterns patterns =
97 sprintf "[%s]" (String.concat " | " (List.map pp_pattern patterns))
99 and pp_capture_variable = function
100 | name, None -> pp_name name
101 | name, Some typ -> "(" ^ pp_name name ^ ": " ^ pp_term typ ^ ")"