The many forms of traits

In the preceding examples, we had a glimpse of the simplest form of trait. But there's more to traits than meets the eye. As you start interacting with traits in bigger code bases, you will encounter different forms of them. Depending on the complexity of the program and the problem to be solved, the simple form of traits might not be suitable. Rust provides us with other forms of traits that model the problem well. We'll take a look at some of the standard library traits and try to classify them so that we have a good idea when to use what.