Utility Functions Constrained
Explore how to use C++20 concepts to constrain utility functions with specific type requirements. Understand how concepts improve type safety, document intended usage, and provide clearer compiler error messages. This lesson helps you write more maintainable and robust template-based utility code.
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Utility functions are most often free or static functions. They are meant to be used with certain user-defined types.
Usually, utility functions make sense only with a handful of types. If the number of types is limited enough, or maybe if they are tied to a class hierarchy, using these utilities is straightforward.
However, if the available types are broad enough, they are often templatized. In such cases, documentation and (template) parameter names ...