lemon/concept_check.h
author Alpar Juttner <alpar@cs.elte.hu>
Thu, 01 Jan 2009 00:00:00 +0100
changeset 463 88ed40ad0d4f
parent 285 d8dc5acf739b
child 1157 761fe0846f49
permissions -rw-r--r--
Happy New Year again
- update the copyright headers + run the source unifier
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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) 2003-2009
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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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  ///\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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    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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    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