Rust 1.29.2

# Generics

There is a new edition of the book and this is an old link.

> Generics are abstract stand-ins for concrete types or other properties.

    struct Point<T, U> {
        x: T,
        y: U,
    }

    fn main() {
        let both_integer = Point { x: 5, y: 10 };
        let both_float = Point { x: 1.0, y: 4.0 };
        let integer_and_float = Point { x: 5, y: 4.0 };
    }Run

Here are the relevant sections in the new and old books:

- In the second edition: Ch 10.00 — Generic Types, Traits, and Lifetimes
- In the first edition: Ch 3.18 — Generics