2 ||M|| This file is part of HELM, an Hypertextual, Electronic
3 ||A|| Library of Mathematics, developed at the Computer Science
4 ||T|| Department, University of Bologna, Italy.
6 ||T|| HELM is free software; you can redistribute it and/or
7 ||A|| modify it under the terms of the GNU General Public License
8 \ / version 2 or (at your option) any later version.
9 \ / This software is distributed as is, NO WARRANTY.
10 V_______________________________________________________________ *)
17 type id = string (* identifier *)
19 type name = id * bool (* token, real? *)
21 type names = name list
23 type attr = Name of name (* name *)
24 | Apix of int (* additional position index *)
25 | Mark of int (* node marker *)
26 | Meta of string (* metaliguistic annotation *)
27 | Priv (* private global definition *)
29 type attrs = attr list (* attributes *)
31 type 'term bind = Abst of 'term (* declaration: domain *)
32 | Abbr of 'term (* definition: body *)
33 | Void (* exclusion *)
35 type 'term entity = attrs * uri * 'term bind (* attrs, name, binder *)
38 delta: bool; (* global delta-expansion *)
39 rt: bool; (* reference typing *)
40 si: bool; (* sort inclusion *)
41 expand: bool (* always expand global definitions *)
44 (* helpers ******************************************************************)
46 let common f (a, u, _) = f a u
48 let rec name err f = function
49 | Name (n, r) :: _ -> f n r
50 | _ :: tl -> name err f tl
54 let rec aux f i a = function
56 | Name (n, r) :: tl -> aux (map f i n r) false a tl
57 | _ :: tl -> aux f i a tl
61 let rec get_name err f j = function
63 | Name (n, r) :: _ when j = 0 -> f n r
64 | Name _ :: tl -> get_name err f (pred j) tl
65 | _ :: tl -> get_name err f j tl
67 let rec get_names f = function
69 | Name _ as n :: tl ->
70 let f a ns = f a (n :: ns) in get_names f tl
72 let f a = f (e :: a) in get_names f tl
75 let rec aux k = function
77 | Name _ :: tl -> aux (succ k) tl
82 let rec apix err f = function
84 | _ :: tl -> apix err f tl
87 let rec mark err f = function
89 | _ :: tl -> mark err f tl
92 let rec priv err f = function
94 | _ :: tl -> priv err f tl
97 let rec meta err f = function
99 | _ :: tl -> meta err f tl
102 let resolve err f name a =
103 let rec aux i = function
104 | Name (n, true) :: _ when n = name -> f i
105 | _ :: tl -> aux (succ i) tl
110 let rec rev_append_names ns = function
112 | Name n :: tl -> rev_append_names (n :: ns) tl
113 | _ :: tl -> rev_append_names ns tl
115 let xlate f xlate_term = function
117 let f t = f (a, uri, Abst t) in xlate_term f t
119 let f t = f (a, uri, Abbr t) in xlate_term f t
123 let initial_status () = {
124 delta = false; rt = false; si = !G.si; expand = !G.expand
127 let refresh_status st = {st with
128 si = !G.si; expand = !G.expand