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#define SOL_ALL_SAFETIES_ON 1
#include <sol/sol.hpp>
#include <iostream>
// Uses some of the fancier bits of sol2, including the
// "transparent argument", sol::this_state, which gets the
// current state and does not increment function arguments
sol::object fancy_func(
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);
}
int main() {
sol::state lua;
lua["f"] = fancy_func;
int result = lua["f"](1, 2);
// result == 3
SOL_ASSERT(result == 3);
double result2 = lua["f"](false, 2.5);
// result2 == 2.5
SOL_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_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;
}
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