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#define SOL_ALL_SAFETIES_ON 1
#include <sol/sol.hpp>
#include <iostream>
struct test {
static int number;
};
int test::number = 25;
int main() {
sol::state lua;
lua.open_libraries();
lua.new_usertype<test>("test",
"direct",
sol::var(2),
"number",
sol::var(test::number),
"ref_number",
sol::var(std::ref(test::number)));
int direct_value = lua["test"]["direct"];
SOL_ASSERT(direct_value == 2);
int number = lua["test"]["number"];
SOL_ASSERT(number == 25);
int ref_number = lua["test"]["ref_number"];
SOL_ASSERT(ref_number == 25);
test::number = 542;
// number is its own memory: was passed by value
// So does not change
int number_again = lua["test"]["number"];
SOL_ASSERT(number_again == 25);
// ref_number is just test::number
// passed through std::ref
// so, it holds a reference
// which can be updated
int ref_number_again = lua["test"]["ref_number"];
SOL_ASSERT(ref_number_again == 542);
// be careful about referencing local variables,
// if they go out of scope but are still reference
// you'll suffer dangling reference bugs!
return 0;
}
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