In the fourth part of the series on generics in Go, constraints are discussed as a way to limit the types that can be used in generic functions. Constraints are crucial for enabling type-specific operations, such as adding numbers or accessing struct fields. The concept of unions, intersections, and type approximations are explained as ways to define constraints that allow a specific range of types. Additionally, the limitations of constraints compared to basic interfaces are highlighted. An exercise involving creating a generic function constrained by fmt.Stringer interface is also provided to demonstrate practical application. The article emphasizes the importance of constraints in utilizing the full potential of generics in Go programming.
https://bitfieldconsulting.com/posts/constraints