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 }; }
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This template is a helper template used by the slice subscript operator slice_array<T> valarray<T>::operator[](slice);
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It has reference semantics to a subset of an array specified by a slice object.
[Example 1:
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]

26.7.5.2 Assignment [slice.arr.assign]

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void operator=(const valarray<T>&) const; const slice_array& operator=(const slice_array&) const;
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These assignment operators have reference semantics, assigning the values of the argument array elements to selected elements of the valarray<T> object to which the slice_­array object refers.

26.7.5.3 Compound assignment [slice.arr.comp.assign]

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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;
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These compound assignments have reference semantics, applying the indicated operation to the elements of the argument array and selected elements of the valarray<T> object to which the slice_­array object refers.

26.7.5.4 Fill function [slice.arr.fill]

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void operator=(const T&) const;
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This function has reference semantics, assigning the value of its argument to the elements of the valarray<T> object to which the slice_­array object refers.