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std::unordered_multimap::emplace_hint

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< cpp‎ | container‎ | unordered multimap
Revision as of 08:50, 2 November 2012 by P12bot (Talk | contribs)

 
 
 
 
template <class... Args>
iterator emplace_hint( const_iterator hint, Args&&... args );
(since C++11)

Inserts a new element to the container, using hint as a suggestion where the element should go. The element is constructed in-place, i.e. no copy or move operations are performed. The constructor of the element type (value_type, that is, std::pair<const Key, T>) is called with exactly the same arguments as supplied to the function, forwarded with std::forward<Args>(args)....

If rehashing occurs due to the insertion, all iterators are invalidated. Otherwise iterators are not affected. References are not invalidated. Rehashing occurs only if the new number of elements is equal to or greater than max_load_factor()*bucket_count().

Contents

Parameters

hint - iterator, used as a suggestion as to where to insert the new element
args - arguments to forward to the constructor of the element

Return value

Returns an iterator to the newly inserted element.


Complexity

Amortized constant on average, worst case linear in the size of the container.

See also

constructs element in-place
(public member function) [edit]
inserts elements
(public member function) [edit]