Constraints
Let us say that you have a function that works with generics that multiplies two numeric values. Should this function work with all data types? Can this function work with all data types? Can you multiply two strings or two structures? The solution for avoiding that kind of issue is the use of constraints. Type constraints allow you to specify the list of data types that you want to work with in order to avoid logical errors and bugs.
Forget about multiplication for a while and think about something simpler. Let us say that we want to compare variables for equality—is there a way to tell Go that we only want to work with values that can be compared? Go 1.18 came with predefined type constraints—one of them is called comparable and includes data types that can be compared for equality or inequality.
For more predefined constraints, you should look at the constraints package (https://pkg.go.dev/golang.org/x/exp/constraints).
The code...
