使用auto / decltype推导出数组类型

Question

要创建std ::对的字符串和绑定函数，我已设法执行以下操作

auto f1 = std::make_pair(std::wstring(L"send_order"),std::bind(&RESTListener::send_order, this, std::placeholders::_1));
auto f2 = std::make_pair(std::wstring(L"on_cancel_order"), std::bind(&RESTListener::on_cancel_all, this, std::placeholders::_1));
auto connectors = std::array<decltype(f1),2>({ f1,f2 });

有没有办法自动推断出数组的类型，所以我可以按照

的方式输入内容

auto connectors = std::array<?????,2>({std::make_pair(std::wstring(L"send_order"),std::bind(&RESTListener::send_order, this, std::placeholders::_1)),std::make_pair(std::wstring(L"on_cancel_order"), std::bind(&RESTListener::on_cancel_all,this, std::placeholders::_1))});

Answer 1

正如@nwp所指出的，更简单的解决方案是记住在执行auto foo = {，}时创建了std :: initializer_list。所以更简洁的解决方案是

auto connectors = {std::make_pair(std::wstring(L"send_order"),std::bind(&RESTListener::send_order, this, std::placeholders::_1)),
                   std::make_pair(std::wstring(L"on_cancel_order"), std::bind(&RESTListener::on_cancel_all, this, std::placeholders::_1)) };