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_______________________________________________________________ *)
16 type ('a, 'b) item = Term of 'a * 'b
22 type ('a, 'b) message = ('a, 'b) item list
24 type ('a, 'b) specs = {
25 pp_term: 'a -> F.formatter -> 'b -> unit;
26 pp_lenv: F.formatter -> 'a -> unit
31 let loc = ref "unknown location"
33 (* Internal functions *******************************************************)
35 let std = F.std_formatter
37 let err = F.err_formatter
39 let pp_items frm st l items =
40 let pp_item frm = function
41 | Term (c, t) -> F.fprintf frm "@,%a" (st.pp_term c) t
42 | LEnv c -> F.fprintf frm "%a" st.pp_lenv c
43 | Warn s -> F.fprintf frm "@,%s" s
44 | String s -> F.fprintf frm "%s " s
45 | Loc -> F.fprintf frm " <%s>" !loc
47 let iter map frm l = List.iter (map frm) l in
48 if !level >= l then F.fprintf frm "%a" (iter pp_item) items
50 (* Interface functions ******************************************************)
54 begin F.fprintf std "@,@[<v 2>%s" " "; F.pp_print_if_newline std () end
56 let unbox l = if !level >= l then F.fprintf std "@]"
58 let flush l = if !level >= l then F.fprintf std "@]@."
60 let box_err () = F.fprintf err "@[<v>"
62 let flush_err () = F.fprintf err "@]@."
64 let log st l items = pp_items std st l items
66 let error st items = pp_items err st 0 items
68 let items1 s = [Warn s]
71 [Warn st; Term (c, t)]
73 let et_items1 sc c st t =
74 [Warn sc; LEnv c; Warn st; Term (c, t)]
76 let et_items2 sc1 c1 st1 t1 ?sc2 ?c2 st2 t2 =
77 let tl = match sc2, c2 with
78 | Some sc2, Some c2 -> et_items1 sc2 c2 st2 t2
79 | None, None -> t_items1 st2 c1 t2
82 et_items1 sc1 c1 st1 t1 @ tl
84 let et_items3 sc1 c1 st1 t1 ?sc2 ?c2 st2 t2 ?sc3 ?c3 st3 t3 =
85 let tl = match sc3, c3 with
86 | Some sc3, Some c3 -> et_items1 sc3 c3 st3 t3
87 | None, None -> t_items1 st3 c1 t3
90 et_items2 sc1 c1 st1 t1 ?sc2 ?c2 st2 t2 @ tl
92 let warn msg = F.fprintf std "@,%s" msg