The title says it all:

Binary literals and digit separators

by Marius Bancila

From the article:

The C++14 standard provides two new small features to the language: binary literals and digit separators. They are already available in Clang 3.4 and GCC 4.9 and now Visual Studio 2015 RC has implemented them. They may not be something you can’t leave without, but sometimes it’s convenient to have them. Let’s have a look...