Question : I'm a little confused about the content of the 28th slide of Basic Concepts V

[ChoiSeonMun]

Hi there.

I came here because I was studying and had trouble understanding something intuitively. The 28th slide says that A function can return a lambda (dynamic dispatch is also possible)

I'm wondering if the code below describes your intent.

auto f(int type) -> bool(*)(int, int)
{
    if (type % 2 == 0)
    {
        return [](int lhs, int rhs) { return lhs < rhs; };
    }
    else
    {
        return [](int lhs, int rhs) { return lhs > rhs; };
    }
}

If my understanding is not correct, could you unpack it a bit more and explain?

[federico-busato]

Hi @ChoiSeonMun, your understanding is correct. Note that you can only return a lambda as a function pointer bool(*)(int, int) only if it doesn't capture anything. Otherwise, dynamic dispatching will not work. I may need to clarify this point in the slides.