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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 |