26 Numerics library [numerics]

26.7 Numeric arrays [numarray]

26.7.5 Class template slice_­array [template.slice.array]

26.7.5.1 Overview [template.slice.array.overview]

namespace std {
  template<class T> class slice_array {
  public:
    using value_type = T;

    void operator=  (const valarray<T>&) const;
    void operator*= (const valarray<T>&) const;
    void operator/= (const valarray<T>&) const;
    void operator%= (const valarray<T>&) const;
    void operator+= (const valarray<T>&) const;
    void operator-= (const valarray<T>&) const;
    void operator^= (const valarray<T>&) const;
    void operator&= (const valarray<T>&) const;
    void operator|= (const valarray<T>&) const;
    void operator<<=(const valarray<T>&) const;
    void operator>>=(const valarray<T>&) const;

    slice_array(const slice_array&);
    ~slice_array();
    const slice_array& operator=(const slice_array&) const;
    void operator=(const T&) const;

    slice_array() = delete;     // as implied by declaring copy constructor above
  };
}
1
#
This template is a helper template used by the slice subscript operator 
slice_array<T> valarray<T>::operator[](slice);
2
#
It has reference semantics to a subset of an array specified by a slice object.
[ Example
:
The expression a[slice(1, 5, 3)] = b; has the effect of assigning the elements of b to a slice of the elements in a.
For the slice shown, the elements selected from a are .
— end example
 ]