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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 | (* 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 |