Re: [igraph] gcc (OK) vs. g++ (failure)?

[Tamas Nepusz]

 

I would like to know whether there is any means to make the below piece of code (igraph_get_shortest_paths_dijkstra.c, which is providen in the \example\simple together with igraph) work for c++?

Try this:

#define VECTOR_PTR(v) ((igraph_vector_t**)(v).stor_begin)

then replace every occurrence of VECTOR(vecs)[i] where vecs is of type igraph_vector_ptr_t with VECTOR_PTR(vecs)[i]. The VECTOR() macro does not work in C++ with igraph_vector_ptr_t types only, it still works with igraph_vector_t. Since an igraph_vector_ptr_t may store any pointer (not just pointers to igraph_vector_t), the VECTOR macro returns values of type void*, and you have to cast that explicitly into an igraph_vector_t**; this is what the above VECTOR_PTR macro will do.

And of course make print_vector return void :)

--
T.