std::experimental::propagate_const::swap (3) Linux Manual Page

std::experimental::propagate_const<T>::swap – std::experimental::propagate_const<T>::swap

Synopsis

constexpr void swap(propagate_const & pt) noexcept(/* see below */); (library fundamentals TS v2)
Swaps the wrapped pointer with that of pt. Let t_ designate the private data member that is the wrapped pointer-like object, then this function is equivalent to swap(t_, pt.t_).

Parameters

pt – another propagate_const object to swap with

Exceptions

noexcept specification:
noexcept(noexcept(swap(t_, pt.t_)))