std::map::swap

 

C++

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Regular expressions library (C++11)

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Technical Specifications

 

Containers library

array (C++11)

vector

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list

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map

multimap

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unordered_multimap (C++11)

stack

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std::map

Member functions

map::map

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Element access

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Iterators

map::beginmap::cbegin (C++11)

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map::rendmap::crend (C++11)

Capacity

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Modifiers

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map::erase

map::swap

Lookup

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Observers

map::key_comp

map::value_comp

 

void swap( map& other );

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 && noexcept(std::swap(std::declval<Compare&>(),std::declval<Compare&>())))	(since C++17)

Complexity

Constant.

See also

std::swap(std::map)

specializes the std::swap algorithm (function template)