In this section, we will review some concepts from C++ programming that will be conceptually important in understanding several topics covered in this book. Many of these concepts have been introduced relatively recently as part of C++11. We will look at: RAII, copy- and move-semantics, auto, range-based for-loops, and C++11 exception handling enhancements. We will look at how these features can be emulated under a pre-C++11 compiler using parts of the Boost libraries.