29 Numerics library [numerics]

29.6 Numeric arrays [numarray]

29.6.7 Class template gslice_array [template.gslice.array]

29.6.7.1 Overview [template.gslice.array.overview]

namespace std {template class gslice_array {public:using value_type = T; void operator= (const valarray&) const; void operator*= (const valarray&) const; void operator/= (const valarray&) const; void operator%= (const valarray&) const; void operator+= (const valarray&) const; void operator-= (const valarray&) const; void operator^= (const valarray&) const; void operator&= (const valarray&) const; void operator|= (const valarray&) const; void operator<<=(const valarray&) const; void operator>>=(const valarray&) 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};}

This template is a helper template used by thegslice subscript operator

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

It has reference semantics to a subset of an array specified by agslice object.

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

29.6.7.2 Assignment [gslice.array.assign]

void operator=(const valarray<T>&) const; const gslice_array& operator=(const gslice_array&) const;

These assignment operators have reference semantics, assigning the values of the argument array elements to selected elements of thevalarray object to which thegslice_array refers.

29.6.7.3 Compound assignment [gslice.array.comp.assign]

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;

These compound assignments have reference semantics, applying the indicated operation to the elements of the argument array and selected elements of thevalarray object to which thegslice_array object refers.

29.6.7.4 Fill function [gslice.array.fill]

void operator=(const T&) const;

This function has reference semantics, assigning the value of its argument to the elements of thevalarray object to which thegslice_array object refers.

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