Wrapping std::function<void()>

[gstavrinos]

Just a heads-up, I am trying to wrap a function that takes an std::function<void()> as an argument, and I get the following error. Seems like it has not been wrapped yet.

No appropriate factory for type St8functionIFvvEE
ERROR: LoadError: No appropriate factory for type St8functionIFvvEE

[sloede]

I have a similar question: Is it possible to wrap a function that on the C++ side expects an argument of type std::function<double(double)> func, and which I can then feed a Julia function?

[barche]

There is no direct conversion from Julia functions to std::function. You can use jlcxx::SafeCFunction or jl_function_t* as arguments to wrapper functions, and then use these to create a C++ lambda that is passed on to the function taking an std::function. There are examples of this in the functions.cpp example in libcxxwrap-julia.

Leaving this open since it may actually be possible to automatically do the conversion from jl_function_t* to std::function automatically, with some work.

[sloede]

Thanks a lot for the quick feedback @barche. I also found this section in the docs, which also sheds some light on it. This should allow me to achieve what I need to do - and with acceptable coding overhead. Great work with CxxWrap.jl, as usual 👍