Function main

examples/source/singleton.cpp:45–74

}

int main(int, char*[]) {
	std::cout << "=== singleton ===" << std::endl;

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

	lua.new_usertype<SomeLib>("SomeLib",
	     "new",
	     sol::no_constructor,
	     "getInstance",
	     &SomeLib::getInstance,
	     "doSomething",
	     &SomeLib::doSomething);

	lua.script(R"(

-- note we use the `.` here, not `:` (there's no self to access)
local sli = SomeLib.getInstance()

-- we use the `:` here because there is something to access
local value = sli:doSomething()

-- check
print('sli:doSomething() returned:', value)
assert(value == 20)
)");

	std::cout << std::endl;
	return 0;
}