std::multimap<Key,T,Compare,Allocator>::merge (3) - Linux Manuals

std::multimap<Key,T,Compare,Allocator>::merge: std::multimap<Key,T,Compare,Allocator>::merge

NAME

std::multimap<Key,T,Compare,Allocator>::merge - std::multimap<Key,T,Compare,Allocator>::merge

Synopsis

template<class C2> (1) (since C++17)
void merge(std::map<Key, T, C2, Allocator>& source);
template<class C2> (2) (since C++17)
void merge(std::map<Key, T, C2, Allocator>&& source);
template<class C2> (3) (since C++17)
void merge(std::multimap<Key, T, C2, Allocator>& source);
template<class C2> (4) (since C++17)
void merge(std::multimap<Key, T, C2, Allocator>&& source);

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

Parameters

source - compatible container to transfer the nodes from

Return value

(none)

Exceptions

Does not throw unless comparison throws.

Complexity

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

Example

 This section is incomplete
 Reason: no example