78 lines
2.6 KiB
C
78 lines
2.6 KiB
C
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/* -*- mode: C++; indent-tabs-mode: nil; -*-
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*
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* This file is a part of LEMON, a generic C++ optimization library.
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*
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* Copyright (C) 2003-2013
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* Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
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* (Egervary Research Group on Combinatorial Optimization, EGRES).
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*
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* Permission to use, modify and distribute this software is granted
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* provided that this copyright notice appears in all copies. For
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* precise terms see the accompanying LICENSE file.
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*
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* This software is provided "AS IS" with no warranty of any kind,
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* express or implied, and with no claim as to its suitability for any
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* purpose.
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*
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*/
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// The contents of this file was inspired by the concept checking
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// utility of the BOOST library (http://www.boost.org).
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///\file
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///\brief Basic utilities for concept checking.
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///
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#ifndef LEMON_CONCEPT_CHECK_H
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#define LEMON_CONCEPT_CHECK_H
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namespace lemon {
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/*
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"inline" is used for ignore_unused_variable_warning()
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and function_requires() to make sure there is no
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overtarget with g++.
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*/
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template <class T> inline void ignore_unused_variable_warning(const T&) { }
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template <class T1, class T2>
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inline void ignore_unused_variable_warning(const T1&, const T2&) { }
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template <class T1, class T2, class T3>
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inline void ignore_unused_variable_warning(const T1&, const T2&,
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const T3&) { }
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template <class T1, class T2, class T3, class T4>
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inline void ignore_unused_variable_warning(const T1&, const T2&,
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const T3&, const T4&) { }
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template <class T1, class T2, class T3, class T4, class T5>
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inline void ignore_unused_variable_warning(const T1&, const T2&,
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const T3&, const T4&,
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const T5&) { }
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template <class T1, class T2, class T3, class T4, class T5, class T6>
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inline void ignore_unused_variable_warning(const T1&, const T2&,
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const T3&, const T4&,
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const T5&, const T6&) { }
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///\e
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template <class Concept>
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inline void function_requires()
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{
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#if !defined(NDEBUG)
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void (Concept::*x)() = & Concept::constraints;
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::lemon::ignore_unused_variable_warning(x);
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#endif
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}
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///\e
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template <typename Concept, typename Type>
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inline void checkConcept() {
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#if !defined(NDEBUG)
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typedef typename Concept::template Constraints<Type> ConceptCheck;
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void (ConceptCheck::*x)() = & ConceptCheck::constraints;
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::lemon::ignore_unused_variable_warning(x);
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#endif
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}
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} // namespace lemon
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#endif // LEMON_CONCEPT_CHECK_H
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