test.cpp

struct A { char* name = "A"; };
struct B { char* name = "B"; };

auto dispatch = [](int n, auto continuation) {
    switch (n) {
        case 0: return continuation(A{});
        case 1: return continuation(B{});
    }
    // throw or something here
};

auto f() {
    return dispatch(1, [](auto t) { return t.name; });
}