struct thing {

thing(sol::this_state ts) {

lua_State* L = ts;

// references the object that called this function

// in constructors:

sol::stack_object selfobj(L, 1);

// definitely the same

thing& self = selfobj.as<thing>();

c_assert(&self == this);

}

void func(sol::this_state ts) const {

lua_State* L = ts;

// references the object that called this function

// in regular member functions:

sol::stack_object selfobj(L, 1);

// "1" is the bottom of the Lua stack

// 2 is one up, so on and so forth...

thing& self = selfobj.as<thing>();

// definitely the same

c_assert(&self == this);

}

};

sol::state lua;

lua.open_libraries(sol::lib::base);

lua.new_usertype<thing>("thing", sol::constructors<thing(sol::this_state)>(), "func", &thing::func);

lua.script(R"(

)");

return 0;