COIN-OR::LEMON - Graph Library

source: lemon-0.x/src/work/alpar/invalid.h @ 209:9a37b8d02d74

Last change on this file since 209:9a37b8d02d74 was 184:08735c8704cd, checked in by Alpar Juttner, 16 years ago

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File size: 629 bytes
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1// -*- mode:C++ -*-
2
3#ifndef HUGO_INVALID_H
4#define HUGO_INVALID_H
5
6namespace hugo {
7
8  /// Dummy type to make it easier to make invalid iterators.
9 
10  /// See \ref INVALID, how to use it.
11 
12  struct Invalid {};
13 
14  /// Invalid iterators.
15 
16  /// \ref Invalid is a global type that converts to each iterator
17  /// in such a way that the value of the target iterator will be invalid.
18
19  // It is also used to convert the \c INVALID constant to the
20  // node iterator that makes is possible to write
21
22  //extern Invalid INVALID;
23
24  //const Invalid &INVALID = *(Invalid *)0;
25  const Invalid INVALID = Invalid();
26
27};
28
29#endif
30 
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