Server executing client's requested configuration with the right permissions
[hcoop/domtool2.git] / src / defaults.sml
1 (* HCoop Domtool (http://hcoop.sourceforge.net/)
2 * Copyright (c) 2006, Adam Chlipala
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
17 *)
18
19 (* Default record field database *)
20
21 structure Defaults :> DEFAULTS = struct
22
23 open Ast Print
24
25 structure SM = StringMap
26
27 val dmy = ErrorMsg.dummyLoc
28
29 val defaultT : record ref = ref SM.empty
30 val defaultV : (unit -> exp) SM.map ref = ref SM.empty
31
32 fun registerDefault (name, t, v) =
33 case SM.find (!defaultT, name) of
34 NONE => (defaultT := SM.insert (!defaultT, name, t);
35 defaultV := SM.insert (!defaultV, name, v))
36 | SOME _ => raise Fail "Duplicate default environment variable"
37
38 fun tInit () = (TAction ((CRoot, dmy),
39 !defaultT,
40 StringMap.empty),
41 dmy)
42
43 fun eInit () = SM.map (fn f => f ()) (!defaultV)
44
45
46 end