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) 2003-2009 |
---|
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 | // The contents of this file was inspired by the concept checking |
---|
20 | // utility of the BOOST library (http://www.boost.org). |
---|
21 | |
---|
22 | ///\file |
---|
23 | ///\brief Basic utilities for concept checking. |
---|
24 | /// |
---|
25 | |
---|
26 | #ifndef LEMON_CONCEPT_CHECK_H |
---|
27 | #define LEMON_CONCEPT_CHECK_H |
---|
28 | |
---|
29 | namespace lemon { |
---|
30 | |
---|
31 | /* |
---|
32 | "inline" is used for ignore_unused_variable_warning() |
---|
33 | and function_requires() to make sure there is no |
---|
34 | overtarget with g++. |
---|
35 | */ |
---|
36 | |
---|
37 | template <class T> inline void ignore_unused_variable_warning(const T&) { } |
---|
38 | |
---|
39 | ///\e |
---|
40 | template <class Concept> |
---|
41 | inline void function_requires() |
---|
42 | { |
---|
43 | #if !defined(NDEBUG) |
---|
44 | void (Concept::*x)() = & Concept::constraints; |
---|
45 | ignore_unused_variable_warning(x); |
---|
46 | #endif |
---|
47 | } |
---|
48 | |
---|
49 | ///\e |
---|
50 | template <typename Concept, typename Type> |
---|
51 | inline void checkConcept() { |
---|
52 | #if !defined(NDEBUG) |
---|
53 | typedef typename Concept::template Constraints<Type> ConceptCheck; |
---|
54 | void (ConceptCheck::*x)() = & ConceptCheck::constraints; |
---|
55 | ignore_unused_variable_warning(x); |
---|
56 | #endif |
---|
57 | } |
---|
58 | |
---|
59 | } // namespace lemon |
---|
60 | |
---|
61 | #endif // LEMON_CONCEPT_CHECK_H |
---|