COIN-OR::LEMON - Graph Library

source: lemon-0.x/src/include/invalid.h @ 389:770cc1f4861f

Last change on this file since 389:770cc1f4861f was 389:770cc1f4861f, checked in by marci, 18 years ago

modifications for better compatibility with gcc 3.4.0

File size: 688 bytes
Line 
1// -*- mode:C++ -*-
2
3#ifndef HUGO_INVALID_H
4#define HUGO_INVALID_H
5
6///\file
7///\brief Definition of INVALID.
8
9namespace hugo {
10
11  /// Dummy type to make it easier to make invalid iterators.
12 
13  /// See \ref INVALID, how to use it.
14 
15  struct Invalid {};
16 
17  /// Invalid iterators.
18 
19  /// \ref Invalid is a global type that converts to each iterator
20  /// in such a way that the value of the target iterator will be invalid.
21
22  // It is also used to convert the \c INVALID constant to the
23  // node iterator that makes is possible to write
24
25  //extern Invalid INVALID;
26
27  //const Invalid &INVALID = *(Invalid *)0;
28  const Invalid INVALID = Invalid();
29
30} //namespace hugo
31
32#endif
33 
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