Search⌘ K

The Trailing <requires> Clause

Explore how to use the trailing requires clause in C++20 to add compiler-checked constraints to template functions. Understand how this clause improves type safety by restricting parameters to specific concept requirements, and learn to write scalable, readable constraints for templates handling multiple parameter types.

How to write trailing requires clause

We can also use the trailing requires clause that comes after the function parameter list (and any qualifiers, like const or override) and before the function implementation.

 ...