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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 | ||
24248d62 AC |
38 | fun allSets (e, _) = |
39 | case e of | |
40 | ESkip => true | |
41 | | ESet _ => true | |
42 | | ESeq es => List.all allSets es | |
43 | | _ => false | |
44 | ||
45 | val dmy = ErrorMsg.dummyLoc | |
46 | ||
47 | fun bodyType (_, _, SOME e) = | |
48 | if allSets e then | |
49 | (CPrefix (CRoot, dmy), dmy) | |
50 | else | |
51 | (CRoot, dmy) | |
52 | | bodyType _ = (CRoot, dmy) | |
53 | ||
54 | fun tInit p = | |
55 | (TAction (bodyType p, | |
56 | !defaultT, | |
57 | StringMap.empty), | |
58 | dmy) | |
aa56e112 AC |
59 | |
60 | fun eInit () = SM.map (fn f => f ()) (!defaultV) | |
61 | ||
62 | ||
63 | end |