std::multimap::merge
From cppreference.com
| template<class C2> void merge(std::map<Key, T, C2, Allocator>& source); |
(1) | (since C++17) |
| template<class C2> void merge(std::map<Key, T, C2, Allocator>&& source); |
(2) | (since C++17) |
| template<class C2> void merge(std::multimap<Key, T, C2, Allocator>& source); |
(3) | (since C++17) |
| template<class C2> void merge(std::multimap<Key, T, 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().
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 |
See also
| (C++17) |
extracts nodes from the container (public member function) |
| inserts elements or nodes (since C++17) (public member function) |