rustlings/solutions/14_generics/generics1.rs
2024-06-27 02:00:08 +02:00

18 lines
562 B
Rust

// `Vec<T>` is generic over the type `T`. In most cases, the compiler is able to
// infer `T`, for example after pushing a value with a concrete type to the vector.
// But in this exercise, the compiler needs some help through a type annotation.
fn main() {
// `u8` and `i8` can both be converted to `i16`.
let mut numbers: Vec<i16> = Vec::new();
// ^^^^^^^^^^ added
// Don't change the lines below.
let n1: u8 = 42;
numbers.push(n1.into());
let n2: i8 = -1;
numbers.push(n2.into());
println!("{numbers:?}");
}