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std::multiset::merge

From cppreference.com
< cpp‎ | container‎ | multiset
template<class C2>
void merge(std::set<Key, C2, Allocator>& source);
(1) (since C++17)
template<class C2>
void merge(std::set<Key, C2, Allocator>&& source);
(2) (since C++17)
template<class C2>
void merge(std::multiset<Key, C2, Allocator>& source);
(3) (since C++17)
template<class C2>
void merge(std::multiset<Key, C2, Allocator>&& source);
(4) (since C++17)

Attempts to extract ("splice") each element in source and insert it into *this using the the comparison object of *this.

No elements are copied or moved, only the internal pointers of the container nodes are repointed. All pointers and references to the transferred elements remain valid, but now refer into *this, not into source.

The behavior is undefined if get_allocator() != source.get_allocator().

Contents

[edit] Parameters

source - compatible container to transfer the nodes from

[edit] Return value

(none)

[edit] Exceptions

Does not throw unless comparison throws.

[edit] Complexity

N*log(size()+N)), where N is source.size()


[edit] Example

[edit] See also

(C++17)
extracts nodes from the container
(public member function) [edit]
inserts elements or nodes (since C++17)
(public member function) [edit]