Rust Generics

Let us look at Rust Generics.  You can start writing Generics in Rust as shown below:

struct Val {
val: f64,
}

struct GenVal<T> {
gen_val: T,
}

// impl of Val
impl Val {
fn value(&self) -> &f64 {
&self.val
}
}

// impl of GenVal for a generic type `T`
impl<T> GenVal<T> {
fn value(&self) -> &T {
&self.gen_val
}
}

fn main() {
let x = Val { val: 3.0 };
let y = GenVal { gen_val: 3i32 };

println!("{}, {}", x.value(), y.value());
}

The code above is compiled using the below command.

rustc generic_example.rs

The output will be as below:

apples-MacBook-Air:generics bhagvan.kommadi$ ls

generic_example generic_example.rs

apples-MacBook-Air:generics bhagvan.kommadi$ ./generic_example

5, 6

apples-MacBook-Air:generics bhagvan.kommadi$