The Four Ways to Use Concepts
Explore the four distinct ways to use C++20 Concepts in function templates to enforce type constraints and improve code clarity. Understand requires clauses, trailing requires clauses, constrained template parameters, and abbreviated function templates to decide which suits your coding needs.
In this section, we’ll learn the four different ways we can use concepts with C++ functions and the four different ways to constrain function templates. Once we understand them and their differences, we’ll see how to choose among the different forms.
Types of concepts
For our examples, let’s assume that we have a concept called Number that requires a built-in arithmetic type of C++. As such, ...