Complete Modern C++ - Constant Expressions - constexpr (C++11)

The video tutorial explains the constexpr keyword introduced in C++11, highlighting its ability to evaluate expressions at compile time, thus improving performance. It contrasts constexpr with the constant keyword, emphasizing that not all constants are evaluated at compile time. The tutorial covers how to create constexpr functions, their limitations, and enhancements in C++14. It also discusses practical considerations for using constexpr and constant keywords effectively.

What is the purpose of the 'constexpr' keyword in C++?

How can you optimize a function to ensure its return value is computed at compile time?

What are the requirements for a function to be considered a constant expression function?

What types are considered literal types in the context of constant expressions?

What happens if you try to initialize a constant expression with a non-constant expression?

Describe the limitations of constant expression functions in C++.

Explain the difference between 'constexpr' and 'const' in terms of initialization time.