[template.gslice.array.overview]

# 29 Numerics library [[numerics]](./#numerics)

## 29.6 Numeric arrays [[numarray]](numarray#template.gslice.array.overview)

### 29.6.7 Class template gslice_array [[template.gslice.array]](template.gslice.array#overview)

#### 29.6.7.1 Overview [template.gslice.array.overview]

[ð](#lib:gslice_array)

namespace std {template<class T> class gslice_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;

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

 gslice_array() = delete; // as implied by declaring copy constructor above};}

[1](#1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/numerics.tex#L8786)

This template is a helper template used by thegslice subscript operator

[ð](#lib:gslice_array_)

`gslice_array<T> valarray<T>::operator[](const gslice&);
`

[2](#2)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/numerics.tex#L8796)

It has reference semantics to a subset of an array specified by agslice object[.](#2.sentence-1)

Thus, the expressiona[gslice(1, length, stride)] = b has the effect of assigning the elements ofb to a
generalized slice of the elements ina[.](#2.sentence-2)
