1 | /* -*- C++ -*- |
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2 | * |
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3 | * This file is a part of LEMON, a generic C++ optimization library |
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4 | * |
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5 | * Copyright (C) 2003-2008 |
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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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19 | #ifndef LEMON_LIST_GRAPH_H |
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20 | #define LEMON_LIST_GRAPH_H |
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21 | |
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22 | ///\ingroup graphs |
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23 | ///\file |
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24 | ///\brief Virtual map support. |
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25 | |
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26 | namespace lemon { |
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27 | |
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28 | ///Base class of the virtual maps. |
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29 | template<class K, class V> |
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30 | class VMapBase |
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31 | { |
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32 | public: |
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33 | ///\e |
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34 | typedef K Key; |
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35 | ///\e |
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36 | typedef V Value; |
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37 | |
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38 | ///\e |
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39 | virtual Value operator[](const Key &) const { return Value();} |
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40 | ///\e |
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41 | virtual void set(const Key &,const Value &) {} |
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42 | }; |
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43 | |
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44 | ///Base class of the virtual reference maps. |
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45 | template<class K, class V> |
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46 | class VRefMapBase |
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47 | { |
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48 | public: |
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49 | ///\e |
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50 | typedef K Key; |
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51 | ///\e |
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52 | typedef V Value; |
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53 | |
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54 | ///\e |
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55 | virtual Value& operator[](Key &) = 0; |
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56 | ///\e |
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57 | virtual Value& operator[](const Key &) const = 0; |
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58 | ///\e |
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59 | virtual void set(const Key &,const Value &) = 0; |
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60 | }; |
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61 | |
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62 | ///Makes a virtual map from a \ref concepts::ReadMap "ReadMap" |
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63 | template<class M, class K=typename M::Key,class V=typename M::Value> |
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64 | class VReadMap : public VMapBase<K,V> |
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65 | { |
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66 | const M ↦ |
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67 | public: |
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68 | ///\e |
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69 | VReadMap(const M &m) : map(m) {} |
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70 | virtual Value operator[](const Key &k) const { return map[k];} |
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71 | }; |
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72 | |
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73 | ///Function interface for \ref VReadMap. |
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74 | template<class M, class K=typename M::Key,class V=typename M::Value> |
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75 | vReadMap(const M& m) {return VReadMap<M,K,V>(m);} |
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76 | |
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77 | ///Makes a virtual map from a \ref concepts::WriteMap "WriteMap" |
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78 | template<class M, class K=typename M::Key,class V=typename M::Value> |
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79 | class VWriteMap :public VMapBase<K,V> |
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80 | { |
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81 | M ↦ |
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82 | public: |
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83 | ///\e |
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84 | VWriteMap(M &m) : map(m) {} |
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85 | virtual void set(const Key &k,const Value &v) { map.set(k,v);} |
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86 | }; |
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87 | |
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88 | ///Function interface for \ref VWriteMap. |
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89 | template<class M, class K=typename M::Key,class V=typename M::Value> |
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90 | vWriteMap(const M& m) {return VReadMap<M,K,V>(m);} |
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91 | |
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92 | ///Makes a virtual map from a \ref concepts::ReadWriteMap "ReadWriteMap" |
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93 | template<class M, class K=typename M::Key,class V=typename M::Value> |
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94 | class VReadWriteMap :public VMapBase<K,V> |
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95 | { |
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96 | M ↦ |
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97 | public: |
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98 | ///\e |
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99 | VReadWriteMap(M &m) : map(m) {} |
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100 | virtual Value operator[](const Key &k) const { return map[k];} |
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101 | virtual void set(const Key &k,const Value &v) { map.set(k,v);} |
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102 | }; |
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103 | |
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104 | ///Function interface for \ref VReadWriteMap. |
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105 | template<class M, class K=typename M::Key,class V=typename M::Value> |
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106 | vReadWriteMap(const M& m) {return VReadMap<M,K,V>(m);} |
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107 | |
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108 | /// @} |
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109 | } //namespace lemon |
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110 | |
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111 | |
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112 | #endif |
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