std::set::emplace

From cppreference.com
template< class... Args >
std::pair<iterator,bool> emplace( Args&&... args );
(since C++11)

Inserts a new element to the container. The element is constructed in-place, i.e. no copy or move operations are performed. The constructor of the element is called with exactly the same arguments, as supplied to the function.

No iterators or references are invalidated.

Contents

[edit] Parameters

args - arguments to forward to the constructor of the element

[edit] Return value

returns a pair consisting of a bool denoting whether the insertion took place and an iterator to the inserted element.

[edit] Complexity

Logarithmic in the size of the container.

[edit] See also

(C++11)
constructs elements in-place using a hint
(public member function)
inserts elements
(public member function)