Changeset - r973:dc376822c17d
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kpeter (Peter Kovacs)
kpeter@inf.elte.hu
Add an undirected() function (#364)
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1 file changed with 19 insertions and 0 deletions:
lemon/core.h
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lemon/core.h
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@@ -445,6 +445,25 @@
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  }


			




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  /// Check whether a graph is undirected.


			




	
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  ///


			




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


			




	
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#ifdef DOXYGEN


			




	
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  template <typename GR>


			




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


			




	
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#else


			




	
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  template <typename GR>


			




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


			




	
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  undirected(const GR&) {


			




	
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    return true;


			




	
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  }


			




	
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  template <typename GR>


			




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


			




	
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  undirected(const GR&) {


			




	
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    return false;


			




	
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  }


			




	
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#endif


			




	
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  /// \brief Class to copy a digraph.


			




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  ///


			




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  /// Class to copy a digraph to another digraph (duplicate a digraph). The


			




        

    






    
    



    


    

     
    
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