1 | /*************************************************************************** |
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2 | * blitz/listinit.h Classes for initialization lists |
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3 | * |
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4 | * $Id: listinit.h,v 1.4 2003/12/11 03:44:22 julianc Exp $ |
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5 | * |
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6 | * Copyright (C) 1997-2001 Todd Veldhuizen <tveldhui@oonumerics.org> |
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7 | * |
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8 | * This program is free software; you can redistribute it and/or |
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9 | * modify it under the terms of the GNU General Public License |
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10 | * as published by the Free Software Foundation; either version 2 |
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11 | * of the License, or (at your option) any later version. |
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12 | * |
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13 | * This program is distributed in the hope that it will be useful, |
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14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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16 | * GNU General Public License for more details. |
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17 | * |
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18 | * Suggestions: blitz-dev@oonumerics.org |
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19 | * Bugs: blitz-bugs@oonumerics.org |
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20 | * |
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21 | * For more information, please see the Blitz++ Home Page: |
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22 | * http://oonumerics.org/blitz/ |
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23 | * |
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24 | ***************************************************************************/ |
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25 | |
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26 | /* |
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27 | * Initialization lists provide a convenient way to set the elements |
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28 | * of an array. For example, |
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29 | * |
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30 | * Array<int,2> A(3,3); |
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31 | * A = 1, 0, 0, |
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32 | * 0, 1, 0, |
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33 | * 0, 0, 1; |
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34 | */ |
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35 | |
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36 | #ifndef BZ_LISTINIT_H |
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37 | #define BZ_LISTINIT_H |
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38 | |
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39 | BZ_NAMESPACE(blitz) |
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40 | |
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41 | template<typename T_numtype, typename T_iterator> |
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42 | class ListInitializer { |
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43 | |
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44 | public: |
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45 | ListInitializer(T_iterator iter) |
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46 | : iter_(iter) |
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47 | { |
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48 | } |
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49 | |
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50 | ListInitializer<T_numtype, T_iterator> operator,(T_numtype x) |
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51 | { |
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52 | *iter_ = x; |
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53 | return ListInitializer<T_numtype, T_iterator>(iter_ + 1); |
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54 | } |
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55 | |
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56 | private: |
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57 | ListInitializer(); |
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58 | |
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59 | protected: |
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60 | T_iterator iter_; |
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61 | }; |
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62 | |
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63 | template<typename T_array, typename T_iterator = _bz_typename T_array::T_numtype*> |
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64 | class ListInitializationSwitch { |
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65 | |
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66 | public: |
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67 | typedef _bz_typename T_array::T_numtype T_numtype; |
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68 | |
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69 | ListInitializationSwitch(const ListInitializationSwitch<T_array>& lis) |
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70 | : array_(lis.array_), value_(lis.value_), |
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71 | wipeOnDestruct_(true) |
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72 | { |
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73 | lis.disable(); |
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74 | } |
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75 | |
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76 | ListInitializationSwitch(T_array& array, T_numtype value) |
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77 | : array_(array), value_(value), wipeOnDestruct_(true) |
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78 | { } |
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79 | |
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80 | ~ListInitializationSwitch() |
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81 | { |
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82 | if (wipeOnDestruct_) |
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83 | array_.initialize(value_); |
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84 | } |
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85 | |
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86 | ListInitializer<T_numtype, T_iterator> operator,(T_numtype x) |
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87 | { |
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88 | wipeOnDestruct_ = false; |
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89 | T_iterator iter = array_.getInitializationIterator(); |
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90 | *iter = value_; |
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91 | T_iterator iter2 = iter + 1; |
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92 | *iter2 = x; |
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93 | return ListInitializer<T_numtype, T_iterator>(iter2 + 1); |
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94 | } |
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95 | |
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96 | void disable() const |
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97 | { |
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98 | wipeOnDestruct_ = false; |
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99 | } |
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100 | |
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101 | private: |
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102 | ListInitializationSwitch(); |
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103 | |
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104 | protected: |
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105 | T_array& array_; |
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106 | T_numtype value_; |
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107 | mutable bool wipeOnDestruct_; |
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108 | }; |
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109 | |
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110 | BZ_NAMESPACE_END |
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111 | |
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112 | #endif // BZ_LISTINIT_H |
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113 | |
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