24 Numerics library [numerics]

24.8 Numeric arrays [numarray]

24.8.5 Class template slice_­array [template.slice.array]

24.8.5.2 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 the valarray<T> object to which the slice_­array object refers.