Modules are coming to C++ in the next standard, and they will have an impact unlike any other new feature added to C++ since 1998. Modules are a first-class system for encapsulating and defining interfaces to translation units. They are a modern replacement for C++'s textual inclusion system (e.g. headers).
Other features change how you write C++ code. Modules change not only how you write your code; they will change the very structure of your C++ projects, your build system, your IDE, and your tools.
In this talk, I'll show you how modules work, how they contrast with the current header inclusion system, how you'll benefit from them, and the transition path for the C++ ecosystem.