move

This post is about don'ts. Here are the two most important rules of this post: Don't use std::move thoughtless and don't slice. Let's start.

Today, we solve " ... a herefore unsolved problem in C++" (Bjarne Stroustrup). To make the long story short, I will write about perfect forwarding.

I will talk about two nice properties of the move semantic in this post that are not so often mentioned. Containers of the standard template library (STL) can have non-copyable elements. The copy semantic is the fallback for the move semantic. Irritated? I hope so!

A lot was written about the advantages of the move semantic to the copy semantic. Instead of an expensive copy operation you can use a cheap move operation. But, what does that mean? I will compare in this post the performance of the copy and move semantic for the containers the Standard Template Library (STL).