Yes C++ is supported - you've already seen the importcpp section. I've wrapped fasttext successfully for example.
[https://github.com/facebookresearch/fastText/blob/master/src/fasttext.h](https://github.com/facebookresearch/fastText/blob/master/src/fasttext.h) [http://nimgen.genotrance.com/nimfastText/fasttext.nim.html](http://nimgen.genotrance.com/nimfastText/fasttext.nim.html) Note that this is autogenerated using [nimgen](https://github.com/genotrance/nimgen) and [c2nim](https://github.com/nim-lang/c2nim/). c2nim isn't able to understand all of C++ like templates or complicated preprocessor declarations so nimgen helps out by running code thru the preprocessor first and making appropriate edits to the code. So yes, it is possible but without seeing what issues you are running into, that's all we can say.
