std::set::swap

 

C++

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Technical Specifications

 

Containers library

array (C++11)

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std::set

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set::set

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set::beginset::cbegin (C++11)

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Modifiers

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Lookup

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Observers

set::key_comp

set::value_comp

 

void swap( set& other );		(until C++17)
void swap( set& other ) noexcept(/* see below */);		(since C++17)

Exchanges the contents of the container with those of other. Does not invoke any move, copy, or swap operations on individual elements.

All iterators and references remain valid. The past-the-end iterator is invalidated.

The Pred objects must be Swappable, and they are exchanged using unqualified call to non-member swap.

If std::allocator_traits<allocator_type>::propagate_on_container_swap::value is true, then the allocators are exchanged using an unqualified call to non-member swap. Otherwise, they are not swapped (and if get_allocator() != other.get_allocator(), the behavior is undefined).

(since C++11)

Parameters

other

-

container to exchange the contents with

Return value

(none)

Exceptions

Any exception thrown by the swap of the Compare objects.	(until C++17)
noexcept specification:   noexcept(std::allocator_traits<Allocator>::is_always_equal::value && std::is_nothrow_swappable<Compare>::value)	(since C++17)

Complexity

Constant.

See also

std::swap(std::set)

specializes the std::swap algorithm (function template)