我正在使用以下代码测试通用引用,templatevectorattach_(vectorxs,T&&x){xs.push_back(std::forward(x));returnxs;}intmain(){intk=2;attach_(std::move(vector{1,2,3}),k);//notOKattach_(std::move(vector{1,2,3}),(int&)k);//notOKattach_(std::move(vector{1,2,3}),(int)k);//OKattach_(std::move(vector{1,2,3}),2);//OK}出现错误:nom