| 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 |