sol::object a, sol::object b, sol::this_state s) {

sol::state_view lua(s);

if (a.is<int>() && b.is<int>()) {

return sol::object(

lua, sol::in_place, a.as<int>() + b.as<int>());

}

else if (a.is<bool>()) {

bool do_triple = a.as<bool>();

return sol::object(lua,

sol::in_place_type<double>,

b.as<double>() * (do_triple ? 3 : 1));

}

// Can also use make_object

return sol::make_object(lua, sol::lua_nil);

sol::state lua;

lua["f"] = fancy_func;

int result = lua["f"](1, 2);

// result == 3

sol_c_assert(result == 3);

double result2 = lua["f"](false, 2.5);

// result2 == 2.5

sol_c_assert(result2 == 2.5);

// call in Lua, get result

// notice we only need 2 arguments here, not 3

// (sol::this_state is transparent)

lua.script("result3 = f(true, 5.5)");

double result3 = lua["result3"];

// result3 == 16.5

sol_c_assert(result3 == 16.5);

std::cout << "=== any_return ===" << std::endl;

std::cout << "result : " << result << std::endl;

std::cout << "result2: " << result2 << std::endl;

std::cout << "result3: " << result3 << std::endl;

std::cout << std::endl;

return 0;

}