By now we all know now that constexpr can be used to generate virtually anything at compile time. But what does this mean for our normal day to day C++ work? How, why, and most importantly where do we use constexpr to get the most out of it in our quest for clean efficient C++?

Introduction

• History and background of C++
• Changes from C++11 to C++14
• Changes from C++14 to C++17
• Limitations of constexpr
• Exercises for demonstrating what can or cannot be constexpr

Preparing for constexpr

• Developing a constexpr mindset
• General advantages to types that fully support constexpr
• Disadvantages to constexpr

Using constexpr

• What is actually required to be executed at compile time?
• Compile-time data verification
• Creating compile-time resources
• Utilizing compile-time resources
• Compile-time sorting
• Compile-time testing

Conclusion

• Maintaining constexpr support
• Current compiler support status
• The future of constexpr for C++20