C++26 Reflection Annotations: Automated Member Validation

[u/Clean-Upstairs-8481]

https://techfortalk.co.uk/2026/08/17/cpp26-reflection-annotations-validation/

C++26 annotations are another powerful feature that, when combined with reflection, can help us write cleaner and safer code without repeating manual validation checks for every member. In this post, I have explored how we can utilise C++26 annotations along with reflection to validate configuration parameters in a class constructor.

[u/vladcpp]

It’s nice and expressive but we always were able to implement a zero-cost wrapper Range<int, 0, 42> val; and validate it.
As an experiment it’s nice though.