[template.slice.array] (original) (raw)

29 Numerics library [numerics]

29.6 Numeric arrays [numarray]

29.6.5 Class template slice_array [template.slice.array]

29.6.5.1 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; };}

This template is a helper template used by theslice subscript operatorslice_array<T> valarray<T>::operator[](slice);

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

[Example 1:

The expressiona[slice(1, 5, 3)] = b;has the effect of assigning the elements ofbto a slice of the elements ina.

For the slice shown, the elements selected fromaare .

— _end example_]

29.6.5.2 Assignment [slice.arr.assign]

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

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

29.6.5.3 Compound assignment [slice.arr.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<T>object to which theslice_arrayobject refers.

29.6.5.4 Fill function [slice.arr.fill]

void operator=(const T&) const;

This function has reference semantics, assigning the value of its argument to the elements of thevalarray<T>object to which theslice_arrayobject refers.