rust•armanriazi•generic
Every programming language has tools for effectively handling the duplication of concepts.
In Rust, one such tool is generics. Generics are abstract stand-ins for concrete types or other properties. When we’re writing code,
we can express the behavior of generics or how they relate to other generics without knowing what will be in their place when compiling and running the code.
The fragment <T: std::ops::Add<Output = T>> says that T must implement std::ops::Add. Using a single type variable T with the trait bound ensures that arguments i and j, as well as the result type, are the same type and that their type supports addition.