hpx::partitioned_vector serializer

[ct-clmsn]

PR for issue #1645

[ct-clmsn]

@hkaiser @sithhell libhpx_partitioned_vector isn't correctly linked by cmake into the serialized partitioned_vector unit test. The unit test can be built manually using hpxcxx without error. I've reviewed the partitioned_vector unit tests and haven't been able to sort out what needs to be added into cmake to fix the linking issue - do ya'll have any tips or suggestions?

[hkaiser]

@ct-clmsn In theory it is sufficient to declare the partitioned_vector_component as a dependency, but that has been done. I have no idea right away, but I'll have a look.

[ct-clmsn]

@hkaiser thanks!

[hkaiser]

@ct-clmsn There was a problem in the segmented parallel::fill implementation which was causing your linker errors. I added a commit to your branch here: e1cc39c. If this goes through now we can merge things from that branch. Thanks for your patience!

[hkaiser]

@ct-clmsn I have updated the commit mentioned above (see a5b25d0). I hope you don't mind me slightly simplifying your implementation... Things should be ready for merging now.

[ct-clmsn]

@hkaiser apologies for unnecessary complexity! i had concerns the most straight forward implementation might miss some compile-time nuances of the platform.

[hkaiser]

@ct-clmsn No apologies needed. Sometimes the simplest solution turns out to be the best in the end... The main issue was that bug in parallel::fill we had - this probably has thrown you off. Thanks again for your contributions!