RhodeCode

  /// Check whether a graph is undirected.

  ///

  /// This function returns \c true if the given graph is undirected.

#ifdef DOXYGEN

  template <typename GR>

  bool undirected(const GR& g) { return false; }

#else

  template <typename GR>

  typename enable_if<UndirectedTagIndicator<GR>, bool>::type

  undirected(const GR&) {

    return true;

  }

  template <typename GR>

  typename disable_if<UndirectedTagIndicator<GR>, bool>::type

  undirected(const GR&) {

    return false;

  }

#endif