Advanced C++ Programming Cookbook

Learning how decltype type deduction rules work

In this recipe, we will learn about how type deduction works with decltype() and decltype(auto), and how to avoid the issues of referenceness with auto using decltype(auto) instead.

This recipe is important as auto has some strange behavior in how it handles references that decltype() addresses, providing C++ with a means to handle type deduction more predictably, especially when working with C++ templates.