generics1.rs (642B)
1 // `Vec<T>` is generic over the type `T`. In most cases, the compiler is able to 2 // infer `T`, for example after pushing a value with a concrete type to the vector. 3 // But in this exercise, the compiler needs some help through a type annotation. 4 5 fn main() { 6 // TODO: Fix the compiler error by annotating the type of the vector 7 // `Vec<T>`. Choose `T` as some integer type that can be created from 8 // `u8` and `i8`. 9 let mut numbers: Vec<i16> = Vec::new(); 10 11 // Don't change the lines below. 12 let n1: u8 = 42; 13 numbers.push(n1.into()); 14 let n2: i8 = -1; 15 numbers.push(n2.into()); 16 17 println!("{numbers:?}"); 18 }