standard select1st and select2nd

Question

Is there any standard select1st and select2st equivalent in C++11?
It seems that these has been defined only in GNU CPP.

Answer 1

For all things that get is defined on:

template <std::size_t N>
constexpr auto select = [] (auto&& x) noexcept -> decltype(auto) {
  return std::get<N>(std::forward<decltype(x)>(x));
};