Function main

examples/source/self_from_lua.cpp:11–53

// low-level operation!

int main() {
	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>();
			SOL_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
			SOL_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"(
obj = thing.new()
obj:func()
	)");

	return 0;
}