[209] | 1 | /* -*- mode: C++; indent-tabs-mode: nil; -*- |
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[25] | 2 | * |
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[209] | 3 | * This file is a part of LEMON, a generic C++ optimization library. |
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[25] | 4 | * |
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[440] | 5 | * Copyright (C) 2003-2009 |
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[25] | 6 | * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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| 7 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
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| 8 | * |
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| 9 | * Permission to use, modify and distribute this software is granted |
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| 10 | * provided that this copyright notice appears in all copies. For |
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| 11 | * precise terms see the accompanying LICENSE file. |
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| 12 | * |
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| 13 | * This software is provided "AS IS" with no warranty of any kind, |
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| 14 | * express or implied, and with no claim as to its suitability for any |
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| 15 | * purpose. |
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| 16 | * |
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| 17 | */ |
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| 18 | |
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[285] | 19 | // The contents of this file was inspired by the concept checking |
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| 20 | // utility of the BOOST library (http://www.boost.org). |
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[25] | 21 | |
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[53] | 22 | ///\file |
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| 23 | ///\brief Basic utilities for concept checking. |
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| 24 | /// |
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| 25 | |
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| 26 | #ifndef LEMON_CONCEPT_CHECK_H |
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| 27 | #define LEMON_CONCEPT_CHECK_H |
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[25] | 28 | |
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| 29 | namespace lemon { |
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| 30 | |
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| 31 | /* |
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| 32 | "inline" is used for ignore_unused_variable_warning() |
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| 33 | and function_requires() to make sure there is no |
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| 34 | overtarget with g++. |
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| 35 | */ |
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| 36 | |
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| 37 | template <class T> inline void ignore_unused_variable_warning(const T&) { } |
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[963] | 38 | template <class T1, class T2> |
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| 39 | inline void ignore_unused_variable_warning(const T1&, const T2&) { } |
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| 40 | template <class T1, class T2, class T3> |
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| 41 | inline void ignore_unused_variable_warning(const T1&, const T2&, |
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| 42 | const T3&) { } |
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| 43 | template <class T1, class T2, class T3, class T4> |
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| 44 | inline void ignore_unused_variable_warning(const T1&, const T2&, |
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| 45 | const T3&, const T4&) { } |
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| 46 | template <class T1, class T2, class T3, class T4, class T5> |
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| 47 | inline void ignore_unused_variable_warning(const T1&, const T2&, |
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| 48 | const T3&, const T4&, |
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| 49 | const T5&) { } |
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| 50 | template <class T1, class T2, class T3, class T4, class T5, class T6> |
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| 51 | inline void ignore_unused_variable_warning(const T1&, const T2&, |
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| 52 | const T3&, const T4&, |
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| 53 | const T5&, const T6&) { } |
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[25] | 54 | |
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[53] | 55 | ///\e |
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[25] | 56 | template <class Concept> |
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| 57 | inline void function_requires() |
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| 58 | { |
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| 59 | #if !defined(NDEBUG) |
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| 60 | void (Concept::*x)() = & Concept::constraints; |
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| 61 | ignore_unused_variable_warning(x); |
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| 62 | #endif |
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| 63 | } |
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| 64 | |
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[53] | 65 | ///\e |
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[25] | 66 | template <typename Concept, typename Type> |
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| 67 | inline void checkConcept() { |
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| 68 | #if !defined(NDEBUG) |
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| 69 | typedef typename Concept::template Constraints<Type> ConceptCheck; |
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| 70 | void (ConceptCheck::*x)() = & ConceptCheck::constraints; |
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| 71 | ignore_unused_variable_warning(x); |
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| 72 | #endif |
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| 73 | } |
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| 74 | |
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| 75 | } // namespace lemon |
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| 76 | |
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[53] | 77 | #endif // LEMON_CONCEPT_CHECK_H |
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