Standard library header <initializer_list> (C++11)

// all freestanding
namespace std {
  template<class E> class initializer_list
  {
  public:
    using value_type = E;
    using reference = const E&;
    using const_reference = const E&;
    using size_type = size_t;

    using iterator = const E*;
    using const_iterator = const E*;

    constexpr initializer_list() noexcept;

    constexpr const E* data() const noexcept;
    constexpr size_t size() const noexcept;
    constexpr bool empty() const noexcept;
    constexpr const E* begin() const noexcept;
    constexpr const E* end() const noexcept;
  };
}