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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. |
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17 | *) |
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18 | |
19 | (* Some useful data structures *) |
20 | |
21 | structure DataStructures = struct |
22 | |
23 | type position = int * int |
24 | |
25 | structure StringOrdKey = struct |
26 | type ord_key = string |
27 | val compare = String.compare |
28 | end |
29 | |
30 | structure StringMap = BinaryMapFn(StringOrdKey) |
31 | structure StringSet = BinarySetFn(StringOrdKey) |
32 | |
33 | datatype 'a hierarchy = |
34 | Leaf of 'a |
35 | | Internal of 'a hierarchy StringMap.map |
36 | |
37 | end |