extern (c++) std::function?

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On Friday, 15 August 2014 at 03:10:43 UTC, Etienne Cimon wrote:
> I'm looking into making a binding for the C++ API called Botan, 
> and the constructors in it take a std::function. I'm wondering 
> if there's a D equivalent for this binding to work out, or if I 
> have to make a C++ wrapper as well?

There are some restrictions about sharing complex types between 
C++ and D. Currently only POD-structs and classes with virtual 
functions are supported for transparent interaction.

In this case things become even more complicated since 
std::function is template class and D can't instantiate C++ 
templates. You should stick with some predefined signatures and 
make wrappers on C++ side, which will accept 'plane' functions 
and construct std::function.