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1 | // -*- mode:C++ -*- |
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2 | |
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3 | #ifndef HUGO_INVALID_H |
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4 | #define HUGO_INVALID_H |
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5 | |
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6 | namespace hugo { |
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7 | |
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8 | /// Dummy type to make it easier to make invalid iterators. |
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9 | |
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10 | /// See \ref INVALID, how to use it. |
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11 | |
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12 | struct Invalid {}; |
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13 | |
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14 | /// Invalid iterators. |
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15 | |
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16 | /// \ref Invalid is a global type that converts to each iterator |
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17 | /// in such a way that the value of the target iterator will be invalid. |
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18 | |
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19 | //extern Invalid INVALID; |
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20 | |
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21 | //const Invalid &INVALID = *(Invalid *)0; |
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22 | const Invalid INVALID = Invalid(); |
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23 | |
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24 | }; |
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25 | |
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26 | #endif |
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27 | |
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