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_______________________________________________________________ *)
15 opening : bool; (* just opened section *)
16 reopening: bool; (* just reopened section *)
17 closing : bool; (* just closed section *)
18 explicit : bool; (* just found explicit context *)
19 block : bool; (* just found block opener *)
20 iao : int; (* implicit context after opening section *)
21 iar : int; (* implicit context after reopening section *)
22 iac : int; (* implicit context after closing section *)
23 iag : int (* implicit context after global statement *)
26 (* internal functions *******************************************************)
29 f {st with opening = false; reopening = false; closing = false}
32 let st = if st.opening then {st with iao = succ st.iao} else st in
33 let st = if st.reopening then {st with iar = succ st.iar} else st in
34 let st = if st.closing then {st with iac = succ st.iac} else st in
39 if st.explicit || st.block then st else {st with iag = succ st.iag}
43 let proc_section f st = function
44 | Some (true, _) -> f {st with opening = true}
45 | Some (false, _) -> f {st with reopening = true}
46 | None -> f {st with closing = true}
48 let proc_context f st =
49 orc_reset f {st with explicit = true}
52 orc_count (orc_reset f) {st with explicit = false; block = true}
54 let proc_global f st =
56 orc_count (orc_reset f) {st with explicit = false; block = false}
60 let proc_item f st item = match item with
61 | A.Section section -> proc_section f st section item
62 | A.Context _ -> proc_context f st item
63 | A.Block _ -> proc_block f st item
64 | A.Decl _ -> proc_global f st item
65 | A.Def _ -> proc_global f st item
67 (* interface functions ******************************************************)
69 let initial_status = {
70 opening = false; reopening = false; closing = false;
71 explicit = false; block = false;
72 iao = 0; iar = 0; iac = 0; iag = 0
75 let process_item = proc_item
77 let get_counters f st = f st.iao st.iar st.iac st.iag