21 Containers library [containers]

21.6 Container adaptors [container.adaptors]

21.6.4 Class template queue [queue]

21.6.4.5 Specialized algorithms [queue.special]

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template<class T, class Container> void swap(queue<T, Container>& x, queue<T, Container>& y) noexcept(noexcept(x.swap(y)));
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Remarks: This function shall not participate in overload resolution unless is_­swappable_­v<Container> is true.
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Effects: As if by x.swap(y).