Advanced · Module 9 · Lesson 6 of 7
Compile-Time Programming: constexpr, consteval and static_assert
Move pure work and validation into compilation with constexpr functions, immediate functions and compile-time assertions.
Pro — members onlyAbout 11 minutes
By the end you can
- Distinguish runtime, constexpr and consteval evaluation
- Use static_assert to make a type or value requirement fail at the source
- Explain when compile-time computation improves correctness and when it increases build cost
01 · A question first
A packet parser knows its field width before the program starts, yet the program still checks it every time. Which work can the compiler perform once, and how can the build reject an invalid configuration before an executable exists?
Make a guess before you read on.
02 · The idea
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What's inside
- Start with the problem
- How the idea works
- Why it is correct
- What it costs
- Pitfalls and variations
- Production guidance
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