If you can work out how to do it safely, then, sure, I don't think anybody would object to adding this feature. I dropped the proposal label because I don't see this as something that needs to go through the proposal process. The problem here is not a concern about whether it is a good idea, but a concern as to whether it is possible at all. A call to a C function needs to change stacks and change the calling convention, so it's not simple.

@ianlancetaylor Thanks, yep, that might be difficult, i just would like to have it for passing python callbacks wrapped with ctypes.Function to golang code, likewise we can do with C.

If you're willing to write cgo, you can always just write a function in a comment in the cgo file that takes a void* and calls it, no?

@quentinmit , do you mean write function signature only? I'm not sure about that, I will be very grateful if you provide a code snippet.

Thanks, i've found a way to do it, not very straightforward, but works