For the class std::valarray<T> there is the following deduction guide

template<class T, size_t cnt> valarray(const T(&)[cnt], size_t) -> valarray;

However such a constructor is not listed among constructors of the class std::valaary<T>.

Is it correct?

With nest regards,
Vlad from Moscow

You can meet me at http://cpp.forum24.ru/ or www.stackoverflow.com or http://ru.stackoverflow.com