What is std::emplace in C++11?

Can you explain what std::emplace does in C++11?

Sure! std::emplace is a function that allows you to construct an object in place within a container, like a vector or map.

How is it different from std::insert?

The main difference is that std::emplace constructs the object directly in the container, while std::insert creates a copy of an existing object.

Can you give me an example of using std::emplace?

Of course! For example, if you have a std::vector, you can use it like this: vec.emplace_back(10, 'a'); to create an object with those parameters directly in the vector.

Are there any performance benefits to using std::emplace?

Yes, using std::emplace can improve performance by eliminating unnecessary copies and allowing for more efficient memory usage.