Rev | Line | |
---|
[906] | 1 | /* -*- C++ -*- |
---|
| 2 | * src/hugo/invalid.h - Part of HUGOlib, a generic C++ optimization library |
---|
| 3 | * |
---|
| 4 | * Copyright (C) 2004 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
---|
| 5 | * (Egervary Combinatorial Optimization Research Group, EGRES). |
---|
| 6 | * |
---|
| 7 | * Permission to use, modify and distribute this software is granted |
---|
| 8 | * provided that this copyright notice appears in all copies. For |
---|
| 9 | * precise terms see the accompanying LICENSE file. |
---|
| 10 | * |
---|
| 11 | * This software is provided "AS IS" with no warranty of any kind, |
---|
| 12 | * express or implied, and with no claim as to its suitability for any |
---|
| 13 | * purpose. |
---|
| 14 | * |
---|
| 15 | */ |
---|
[162] | 16 | |
---|
| 17 | #ifndef HUGO_INVALID_H |
---|
| 18 | #define HUGO_INVALID_H |
---|
| 19 | |
---|
[242] | 20 | ///\file |
---|
| 21 | ///\brief Definition of INVALID. |
---|
| 22 | |
---|
[162] | 23 | namespace hugo { |
---|
| 24 | |
---|
| 25 | /// Dummy type to make it easier to make invalid iterators. |
---|
| 26 | |
---|
| 27 | /// See \ref INVALID, how to use it. |
---|
| 28 | |
---|
[412] | 29 | struct Invalid { |
---|
| 30 | public: |
---|
| 31 | bool operator==(Invalid) { return true; } |
---|
| 32 | bool operator!=(Invalid) { return false; } |
---|
| 33 | bool operator< (Invalid) { return false; } |
---|
| 34 | }; |
---|
[162] | 35 | |
---|
| 36 | /// Invalid iterators. |
---|
| 37 | |
---|
| 38 | /// \ref Invalid is a global type that converts to each iterator |
---|
| 39 | /// in such a way that the value of the target iterator will be invalid. |
---|
[184] | 40 | |
---|
| 41 | // It is also used to convert the \c INVALID constant to the |
---|
| 42 | // node iterator that makes is possible to write |
---|
| 43 | |
---|
[165] | 44 | //extern Invalid INVALID; |
---|
[162] | 45 | |
---|
[169] | 46 | //const Invalid &INVALID = *(Invalid *)0; |
---|
| 47 | const Invalid INVALID = Invalid(); |
---|
[162] | 48 | |
---|
[389] | 49 | } //namespace hugo |
---|
[162] | 50 | |
---|
| 51 | #endif |
---|
| 52 | |
---|
Note: See
TracBrowser
for help on using the repository browser.