[mlpack-git] [mlpack/mlpack] Serialize a class with "map<int, Node*>" (#811)

[Ryan Curtin]

Sure, I am glad that it helped.

There are two options for serialization support for STL containers that hold mlpack objects: the first is to simply reimplement the STL container serialization support inside the class that uses the container (but that is a little ugly).  The second is a bit uglier:

A class template specialization can be added for each `SecondShim<std::type<...>>` object.  Inside of this  class, the `serialize()` method can be implemented in such a way that it is just the implementation of the STL container's `serialize()` function, except with `BOOST_SERIALIZATION_NVP()` replaced with `ar & data::CreateNVP(...)`.

It would be kind of complex and would require testing (although the test case would be simple... just make sure that `ar & data::CreateNVP(some STL container)` compiles).  I personally don't have any plans to implement this right now, but if you would like to the contribution would be welcome. :)

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