std::valarray::swap

From cppreference.com
< cpplrm; | numericlrm; | valarray
void swap( valarray& other );

Swaps the contents with those of other.

Parameters

other - another valarray to swap the contents with

Return value

(none)

Exceptions

(none) (until C++11)
noexcept specification:
noexcept
(since C++11)