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rustlings/exercises/14_generics/generics1.rs

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// `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.
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fn main() {
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// TODO: Fix the compiler error by annotating the type of the vector
// `Vec<T>`. Choose `T` as some integer type that can be created from
// `u8` and `i8`.
let mut numbers = Vec::new();
// Don't change the lines below.
let n1: u8 = 42;
numbers.push(n1.into());
let n2: i8 = -1;
numbers.push(n2.into());
println!("{numbers:?}");
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}