17 Language support library [language.support]

17.10 Initializer lists [support.initlist]

17.10.4 Initializer list range access [support.initlist.range]

template<class E> constexpr const E* begin(initializer_list<E> il) noexcept;
Returns: il.begin().
template<class E> constexpr const E* end(initializer_list<E> il) noexcept;
Returns: il.end().