COIN-OR::LEMON - Graph Library

source: lemon/lemon/concept_check.h @ 247:f1158744a112

Last change on this file since 247:f1158744a112 was 209:765619b7cbb2, checked in by Alpar Juttner <alpar@…>, 11 years ago

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1/* -*- mode: C++; indent-tabs-mode: nil; -*-
2 *
3 * This file is a part of LEMON, a generic C++ optimization library.
4 *
5 * Copyright (C) 2003-2008
6 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
7 * (Egervary Research Group on Combinatorial Optimization, EGRES).
8 *
9 * Permission to use, modify and distribute this software is granted
10 * provided that this copyright notice appears in all copies. For
11 * precise terms see the accompanying LICENSE file.
12 *
13 * This software is provided "AS IS" with no warranty of any kind,
14 * express or implied, and with no claim as to its suitability for any
15 * purpose.
16 *
17 */
18
19// This file contains a modified version of the concept checking
20// utility from BOOST.
21// See the appropriate copyright notice below.
22
23// (C) Copyright Jeremy Siek 2000.
24// Distributed under the Boost Software License, Version 1.0. (See
25// accompanying file LICENSE_1_0.txt or copy at
26// http://www.boost.org/LICENSE_1_0.txt)
27//
28// Revision History:
29//   05 May   2001: Workarounds for HP aCC from Thomas Matelich. (Jeremy Siek)
30//   02 April 2001: Removed limits header altogether. (Jeremy Siek)
31//   01 April 2001: Modified to use new <boost/limits.hpp> header. (JMaddock)
32//
33
34// See http://www.boost.org/libs/concept_check for documentation.
35
36///\file
37///\brief Basic utilities for concept checking.
38///
39///\todo Are we still using BOOST concept checking utility?
40///Is the BOOST copyright notice necessary?
41
42#ifndef LEMON_CONCEPT_CHECK_H
43#define LEMON_CONCEPT_CHECK_H
44
45namespace lemon {
46
47  /*
48    "inline" is used for ignore_unused_variable_warning()
49    and function_requires() to make sure there is no
50    overtarget with g++.
51  */
52
53  template <class T> inline void ignore_unused_variable_warning(const T&) { }
54
55  ///\e
56  template <class Concept>
57  inline void function_requires()
58  {
59#if !defined(NDEBUG)
60    void (Concept::*x)() = & Concept::constraints;
61    ignore_unused_variable_warning(x);
62#endif
63  }
64
65  ///\e
66  template <typename Concept, typename Type>
67  inline void checkConcept() {
68#if !defined(NDEBUG)
69    typedef typename Concept::template Constraints<Type> ConceptCheck;
70    void (ConceptCheck::*x)() = & ConceptCheck::constraints;
71    ignore_unused_variable_warning(x);
72#endif
73  }
74
75} // namespace lemon
76
77#endif // LEMON_CONCEPT_CHECK_H
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