C++11 rvalue reference vs const reference

Question

This may be obvious but I think it is something difficult to me. Given this:

void test(std::string&&) { }

std::string x{\"test\"};
test(std::move(x)         


        

Answer 1

If you want a function to expressly allow const-Lvalue objects, but expressly disallow Rvalue objects, write the function signature like this:

void test(const std::string&) { }
void test(std::string&&) = delete;//Will now be considered when matching signatures

int main() {
    std::string string = "test";
    test(string);//OK
    //test(std::move(string));//Compile Error!
    //test("Test2");//Compile Error!
}