std::queue<T,Container>::swap

 

C++

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std::queue

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queue::push

queue::emplace (C++11)

queue::pop

queue::swap (C++11)

Non-member functions

operator==operator!=operator<operator>operator<=operator>=operator<=> (C++20)

std::swap

Deduction guides(C++17)

 

void swap( queue& other ) noexcept(/* see below */);		(since C++11)

Exchanges the contents of the container adaptor with those of other. Effectively calls using std::swap; swap(c, other.c);

Parameters

other

-

container adaptor to exchange the contents with

Return value

(none)

Exceptions

noexcept specification:   noexcept(noexcept(swap(c, other.c))) In the expression above, the identifier swap is looked up in the same manner as the one used by the C++17 std::is_nothrow_swappable trait.	(since C++11) (until C++17)
noexcept specification:   noexcept(std::is_nothrow_swappable_v<Container>)	(since C++17)

Complexity

Same as underlying container (typically constant).

Notes

Some implementations (e.g. libc++) provide the swap member function as an extension to pre-C++11 modes.

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR	Applied to	Behavior as published	Correct behavior
LWG 2456	C++11	the noexcept specification is ill-formed	made to work

See also

std::swap(std::queue) (C++11)

specializes the std::swap algorithm (function template)