Q: Lua function in C++ function arguments

[shierru]

Question

Hi, I would like to ask you how I could implement a C++ function accessible from Lua, to which I could "pass" another function?

Perhaps with an example it will be easier to understand:

funcLua = function() -- Lua function
    print("call testPrint")
end

test(funcLua) -- Call C++ function

On the C++ side it should be possible to call a Lua function passed through arguments.

Thanks in advance for your help!

[Rochet2]

lua["test"] = [](sol::function funcLua) {
    return funcLua();
};

I believe it should be as easy as that. This code is C++ side code that defines test function to take in some kind of callable object (any function or object with __call metamethod) and then it calls it and returns the return value to the caller.

[shierru]

Man, this issue is useless from the start. I'm sorry!

Before my issue I first tried the option you suggested and it didn't work for me, throwing a "runtime error". And just now I found a completely stupid error ^_^

Thank you very much for your reply!