r548:41bdb4d6c8c3
Mon, 12 Oct 2009 13:41:15
[Not Reviewed]
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@@ -1015,18 +1015,20 @@ |
| 1015 | 1015 |
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| 1016 | 1016 |
/// \brief The source of a path |
| 1017 | 1017 |
/// |
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/// This function returns the source of the given path. |
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/// This function returns the source node of the given path. |
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/// If the path is empty, then it returns \c INVALID. |
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template <typename Digraph, typename Path> |
| 1020 | 1021 |
typename Digraph::Node pathSource(const Digraph& digraph, const Path& path) {
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| 1021 |
return digraph.source(path.front()); |
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| 1022 |
return path.empty() ? INVALID : digraph.source(path.front()); |
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| 1022 | 1023 |
} |
| 1023 | 1024 |
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/// \brief The target of a path |
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/// |
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/// This function returns the target of the given path. |
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/// This function returns the target node of the given path. |
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/// If the path is empty, then it returns \c INVALID. |
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template <typename Digraph, typename Path> |
| 1028 | 1030 |
typename Digraph::Node pathTarget(const Digraph& digraph, const Path& path) {
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return digraph.target(path.back()); |
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return path.empty() ? INVALID : digraph.target(path.back()); |
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| 1030 | 1032 |
} |
| 1031 | 1033 |
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/// \brief Class which helps to iterate through the nodes of a path |
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