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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 |