diff options
Diffstat (limited to 'exercises/14_generics')
| -rw-r--r-- | exercises/14_generics/generics1.rs | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/exercises/14_generics/generics1.rs b/exercises/14_generics/generics1.rs index c023e64..87ed990 100644 --- a/exercises/14_generics/generics1.rs +++ b/exercises/14_generics/generics1.rs @@ -1,7 +1,18 @@ -// This shopping list program isn't compiling! Use your knowledge of generics to -// fix it. +// `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() { - let mut shopping_list: Vec<?> = Vec::new(); - shopping_list.push("milk"); + // 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:?}"); } |
